sys/netinet/sctp_pcb.c

   1 /*-
   2  * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
   4  * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * a) Redistributions of source code must retain the above copyright notice,
  10  *    this list of conditions and the following disclaimer.
  11  *
  12  * b) Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the distribution.
  15  *
  16  * c) Neither the name of Cisco Systems, Inc. nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  30  * THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <netinet/sctp_os.h>
  37 #include <sys/proc.h>
  38 #include <netinet/sctp_var.h>
  39 #include <netinet/sctp_sysctl.h>
  40 #include <netinet/sctp_pcb.h>
  41 #include <netinet/sctputil.h>
  42 #include <netinet/sctp.h>
  43 #include <netinet/sctp_header.h>
  44 #include <netinet/sctp_asconf.h>
  45 #include <netinet/sctp_output.h>
  46 #include <netinet/sctp_timer.h>
  47 #include <netinet/sctp_bsd_addr.h>
  48 #include <netinet/sctp_dtrace_define.h>
  49 #if defined(INET) || defined(INET6)
  50 #include <netinet/udp.h>
  51 #endif
  52 #ifdef INET6
  53 #include <netinet6/ip6_var.h>
  54 #endif
  55 #include <sys/sched.h>
  56 #include <sys/smp.h>
  57 #include <sys/unistd.h>
  58
  59
  60 VNET_DEFINE(struct sctp_base_info, system_base_info);
  61
  62 /* FIX: we don't handle multiple link local scopes */
  63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */
  64 #ifdef INET6
  65 int
  66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b)
  67 {
  68         struct sockaddr_in6 tmp_a, tmp_b;
  69
  70         memcpy(&tmp_a, a, sizeof(struct sockaddr_in6));
  71         if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  72                 return (0);
  73         }
  74         memcpy(&tmp_b, b, sizeof(struct sockaddr_in6));
  75         if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
  76                 return (0);
  77         }
  78         return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr));
  79 }
  80
  81 #endif
  82
  83 void
  84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb)
  85 {
  86         /*
  87          * We really don't need to lock this, but I will just because it
  88          * does not hurt.
  89          */
  90         SCTP_INP_INFO_RLOCK();
  91         spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep);
  92         spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc);
  93         spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr);
  94         spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr);
  95         spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk);
  96         spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq);
  97         spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq);
  98         spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks);
  99         SCTP_INP_INFO_RUNLOCK();
 100 }
 101
 102 /*-
 103  * Addresses are added to VRF's (Virtual Router's). For BSD we
 104  * have only the default VRF 0. We maintain a hash list of
 105  * VRF's. Each VRF has its own list of sctp_ifn's. Each of
 106  * these has a list of addresses. When we add a new address
 107  * to a VRF we lookup the ifn/ifn_index, if the ifn does
 108  * not exist we create it and add it to the list of IFN's
 109  * within the VRF. Once we have the sctp_ifn, we add the
 110  * address to the list. So we look something like:
 111  *
 112  * hash-vrf-table
 113  *   vrf-> ifn-> ifn -> ifn
 114  *   vrf    |
 115  *    ...   +--ifa-> ifa -> ifa
 116  *   vrf
 117  *
 118  * We keep these separate lists since the SCTP subsystem will
 119  * point to these from its source address selection nets structure.
 120  * When an address is deleted it does not happen right away on
 121  * the SCTP side, it gets scheduled. What we do when a
 122  * delete happens is immediately remove the address from
 123  * the master list and decrement the refcount. As our
 124  * addip iterator works through and frees the src address
 125  * selection pointing to the sctp_ifa, eventually the refcount
 126  * will reach 0 and we will delete it. Note that it is assumed
 127  * that any locking on system level ifn/ifa is done at the
 128  * caller of these functions and these routines will only
 129  * lock the SCTP structures as they add or delete things.
 130  *
 131  * Other notes on VRF concepts.
 132  *  - An endpoint can be in multiple VRF's
 133  *  - An association lives within a VRF and only one VRF.
 134  *  - Any incoming packet we can deduce the VRF for by
 135  *    looking at the mbuf/pak inbound (for BSD its VRF=0 :D)
 136  *  - Any downward send call or connect call must supply the
 137  *    VRF via ancillary data or via some sort of set default
 138  *    VRF socket option call (again for BSD no brainer since
 139  *    the VRF is always 0).
 140  *  - An endpoint may add multiple VRF's to it.
 141  *  - Listening sockets can accept associations in any
 142  *    of the VRF's they are in but the assoc will end up
 143  *    in only one VRF (gotten from the packet or connect/send).
 144  *
 145  */
 146
 147 struct sctp_vrf *
 148 sctp_allocate_vrf(int vrf_id)
 149 {
 150         struct sctp_vrf *vrf = NULL;
 151         struct sctp_vrflist *bucket;
 152
 153         /* First allocate the VRF structure */
 154         vrf = sctp_find_vrf(vrf_id);
 155         if (vrf) {
 156                 /* Already allocated */
 157                 return (vrf);
 158         }
 159         SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf),
 160             SCTP_M_VRF);
 161         if (vrf == NULL) {
 162                 /* No memory */
 163 #ifdef INVARIANTS
 164                 panic("No memory for VRF:%d", vrf_id);
 165 #endif
 166                 return (NULL);
 167         }
 168         /* setup the VRF */
 169         memset(vrf, 0, sizeof(struct sctp_vrf));
 170         vrf->vrf_id = vrf_id;
 171         LIST_INIT(&vrf->ifnlist);
 172         vrf->total_ifa_count = 0;
 173         vrf->refcount = 0;
 174         /* now also setup table ids */
 175         SCTP_INIT_VRF_TABLEID(vrf);
 176         /* Init the HASH of addresses */
 177         vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE,
 178             &vrf->vrf_addr_hashmark);
 179         if (vrf->vrf_addr_hash == NULL) {
 180                 /* No memory */
 181 #ifdef INVARIANTS
 182                 panic("No memory for VRF:%d", vrf_id);
 183 #endif
 184                 SCTP_FREE(vrf, SCTP_M_VRF);
 185                 return (NULL);
 186         }
 187         /* Add it to the hash table */
 188         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 189         LIST_INSERT_HEAD(bucket, vrf, next_vrf);
 190         atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 191         return (vrf);
 192 }
 193
 194
 195 struct sctp_ifn *
 196 sctp_find_ifn(void *ifn, uint32_t ifn_index)
 197 {
 198         struct sctp_ifn *sctp_ifnp;
 199         struct sctp_ifnlist *hash_ifn_head;
 200
 201         /*
 202          * We assume the lock is held for the addresses if that's wrong
 203          * problems could occur :-)
 204          */
 205         hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 206         LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) {
 207                 if (sctp_ifnp->ifn_index == ifn_index) {
 208                         return (sctp_ifnp);
 209                 }
 210                 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) {
 211                         return (sctp_ifnp);
 212                 }
 213         }
 214         return (NULL);
 215 }
 216
 217
 218 struct sctp_vrf *
 219 sctp_find_vrf(uint32_t vrf_id)
 220 {
 221         struct sctp_vrflist *bucket;
 222         struct sctp_vrf *liste;
 223
 224         bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))];
 225         LIST_FOREACH(liste, bucket, next_vrf) {
 226                 if (vrf_id == liste->vrf_id) {
 227                         return (liste);
 228                 }
 229         }
 230         return (NULL);
 231 }
 232
 233
 234 void
 235 sctp_free_vrf(struct sctp_vrf *vrf)
 236 {
 237         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) {
 238                 if (vrf->vrf_addr_hash) {
 239                         SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
 240                         vrf->vrf_addr_hash = NULL;
 241                 }
 242                 /* We zero'd the count */
 243                 LIST_REMOVE(vrf, next_vrf);
 244                 SCTP_FREE(vrf, SCTP_M_VRF);
 245                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1);
 246         }
 247 }
 248
 249
 250 void
 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp)
 252 {
 253         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) {
 254                 /* We zero'd the count */
 255                 if (sctp_ifnp->vrf) {
 256                         sctp_free_vrf(sctp_ifnp->vrf);
 257                 }
 258                 SCTP_FREE(sctp_ifnp, SCTP_M_IFN);
 259                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 260         }
 261 }
 262
 263
 264 void
 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu)
 266 {
 267         struct sctp_ifn *sctp_ifnp;
 268
 269         sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index);
 270         if (sctp_ifnp != NULL) {
 271                 sctp_ifnp->ifn_mtu = mtu;
 272         }
 273 }
 274
 275
 276 void
 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap)
 278 {
 279         if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) {
 280                 /* We zero'd the count */
 281                 if (sctp_ifap->ifn_p) {
 282                         sctp_free_ifn(sctp_ifap->ifn_p);
 283                 }
 284                 SCTP_FREE(sctp_ifap, SCTP_M_IFA);
 285                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 286         }
 287 }
 288
 289
 290 static void
 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock)
 292 {
 293         struct sctp_ifn *found;
 294
 295         found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index);
 296         if (found == NULL) {
 297                 /* Not in the list.. sorry */
 298                 return;
 299         }
 300         if (hold_addr_lock == 0)
 301                 SCTP_IPI_ADDR_WLOCK();
 302         LIST_REMOVE(sctp_ifnp, next_bucket);
 303         LIST_REMOVE(sctp_ifnp, next_ifn);
 304         SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index,
 305             sctp_ifnp->registered_af);
 306         if (hold_addr_lock == 0)
 307                 SCTP_IPI_ADDR_WUNLOCK();
 308         /* Take away the reference, and possibly free it */
 309         sctp_free_ifn(sctp_ifnp);
 310 }
 311
 312
 313 void
 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr,
 315     const char *if_name, uint32_t ifn_index)
 316 {
 317         struct sctp_vrf *vrf;
 318         struct sctp_ifa *sctp_ifap;
 319
 320         SCTP_IPI_ADDR_RLOCK();
 321         vrf = sctp_find_vrf(vrf_id);
 322         if (vrf == NULL) {
 323                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 324                 goto out;
 325
 326         }
 327         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 328         if (sctp_ifap == NULL) {
 329                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 330                 goto out;
 331         }
 332         if (sctp_ifap->ifn_p == NULL) {
 333                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 334                 goto out;
 335         }
 336         if (if_name) {
 337                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 338                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 339                             sctp_ifap->ifn_p->ifn_name, if_name);
 340                         goto out;
 341                 }
 342         } else {
 343                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 344                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 345                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 346                         goto out;
 347                 }
 348         }
 349
 350         sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID);
 351         sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
 352 out:
 353         SCTP_IPI_ADDR_RUNLOCK();
 354 }
 355
 356
 357 void
 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr,
 359     const char *if_name, uint32_t ifn_index)
 360 {
 361         struct sctp_vrf *vrf;
 362         struct sctp_ifa *sctp_ifap;
 363
 364         SCTP_IPI_ADDR_RLOCK();
 365         vrf = sctp_find_vrf(vrf_id);
 366         if (vrf == NULL) {
 367                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 368                 goto out;
 369
 370         }
 371         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 372         if (sctp_ifap == NULL) {
 373                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n");
 374                 goto out;
 375         }
 376         if (sctp_ifap->ifn_p == NULL) {
 377                 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n");
 378                 goto out;
 379         }
 380         if (if_name) {
 381                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) {
 382                         SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n",
 383                             sctp_ifap->ifn_p->ifn_name, if_name);
 384                         goto out;
 385                 }
 386         } else {
 387                 if (sctp_ifap->ifn_p->ifn_index != ifn_index) {
 388                         SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n",
 389                             sctp_ifap->ifn_p->ifn_index, ifn_index);
 390                         goto out;
 391                 }
 392         }
 393
 394         sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE);
 395         sctp_ifap->localifa_flags |= SCTP_ADDR_VALID;
 396 out:
 397         SCTP_IPI_ADDR_RUNLOCK();
 398 }
 399
 400
 401 /*-
 402  * Add an ifa to an ifn.
 403  * Register the interface as necessary.
 404  * NOTE: ADDR write lock MUST be held.
 405  */
 406 static void
 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap)
 408 {
 409         int ifa_af;
 410
 411         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 412         sctp_ifap->ifn_p = sctp_ifnp;
 413         atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 414         /* update address counts */
 415         sctp_ifnp->ifa_count++;
 416         ifa_af = sctp_ifap->address.sa.sa_family;
 417         switch (ifa_af) {
 418 #ifdef INET
 419         case AF_INET:
 420                 sctp_ifnp->num_v4++;
 421                 break;
 422 #endif
 423 #ifdef INET6
 424         case AF_INET6:
 425                 sctp_ifnp->num_v6++;
 426                 break;
 427 #endif
 428         default:
 429                 break;
 430         }
 431         if (sctp_ifnp->ifa_count == 1) {
 432                 /* register the new interface */
 433                 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af);
 434                 sctp_ifnp->registered_af = ifa_af;
 435         }
 436 }
 437
 438
 439 /*-
 440  * Remove an ifa from its ifn.
 441  * If no more addresses exist, remove the ifn too. Otherwise, re-register
 442  * the interface based on the remaining address families left.
 443  * NOTE: ADDR write lock MUST be held.
 444  */
 445 static void
 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap)
 447 {
 448         LIST_REMOVE(sctp_ifap, next_ifa);
 449         if (sctp_ifap->ifn_p) {
 450                 /* update address counts */
 451                 sctp_ifap->ifn_p->ifa_count--;
 452                 switch (sctp_ifap->address.sa.sa_family) {
 453 #ifdef INET
 454                 case AF_INET:
 455                         sctp_ifap->ifn_p->num_v4--;
 456                         break;
 457 #endif
 458 #ifdef INET6
 459                 case AF_INET6:
 460                         sctp_ifap->ifn_p->num_v6--;
 461                         break;
 462 #endif
 463                 default:
 464                         break;
 465                 }
 466
 467                 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) {
 468                         /* remove the ifn, possibly freeing it */
 469                         sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED);
 470                 } else {
 471                         /* re-register address family type, if needed */
 472                         if ((sctp_ifap->ifn_p->num_v6 == 0) &&
 473                             (sctp_ifap->ifn_p->registered_af == AF_INET6)) {
 474                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 475                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 476                                 sctp_ifap->ifn_p->registered_af = AF_INET;
 477                         } else if ((sctp_ifap->ifn_p->num_v4 == 0) &&
 478                             (sctp_ifap->ifn_p->registered_af == AF_INET)) {
 479                                 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET);
 480                                 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6);
 481                                 sctp_ifap->ifn_p->registered_af = AF_INET6;
 482                         }
 483                         /* free the ifn refcount */
 484                         sctp_free_ifn(sctp_ifap->ifn_p);
 485                 }
 486                 sctp_ifap->ifn_p = NULL;
 487         }
 488 }
 489
 490
 491 struct sctp_ifa *
 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index,
 493     uint32_t ifn_type, const char *if_name, void *ifa,
 494     struct sockaddr *addr, uint32_t ifa_flags,
 495     int dynamic_add)
 496 {
 497         struct sctp_vrf *vrf;
 498         struct sctp_ifn *sctp_ifnp = NULL;
 499         struct sctp_ifa *sctp_ifap = NULL;
 500         struct sctp_ifalist *hash_addr_head;
 501         struct sctp_ifnlist *hash_ifn_head;
 502         uint32_t hash_of_addr;
 503         int new_ifn_af = 0;
 504
 505 #ifdef SCTP_DEBUG
 506         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id);
 507         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 508 #endif
 509         SCTP_IPI_ADDR_WLOCK();
 510         sctp_ifnp = sctp_find_ifn(ifn, ifn_index);
 511         if (sctp_ifnp) {
 512                 vrf = sctp_ifnp->vrf;
 513         } else {
 514                 vrf = sctp_find_vrf(vrf_id);
 515                 if (vrf == NULL) {
 516                         vrf = sctp_allocate_vrf(vrf_id);
 517                         if (vrf == NULL) {
 518                                 SCTP_IPI_ADDR_WUNLOCK();
 519                                 return (NULL);
 520                         }
 521                 }
 522         }
 523         if (sctp_ifnp == NULL) {
 524                 /*
 525                  * build one and add it, can't hold lock until after malloc
 526                  * done though.
 527                  */
 528                 SCTP_IPI_ADDR_WUNLOCK();
 529                 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *,
 530                     sizeof(struct sctp_ifn), SCTP_M_IFN);
 531                 if (sctp_ifnp == NULL) {
 532 #ifdef INVARIANTS
 533                         panic("No memory for IFN");
 534 #endif
 535                         return (NULL);
 536                 }
 537                 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn));
 538                 sctp_ifnp->ifn_index = ifn_index;
 539                 sctp_ifnp->ifn_p = ifn;
 540                 sctp_ifnp->ifn_type = ifn_type;
 541                 sctp_ifnp->refcount = 0;
 542                 sctp_ifnp->vrf = vrf;
 543                 atomic_add_int(&vrf->refcount, 1);
 544                 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family);
 545                 if (if_name != NULL) {
 546                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name);
 547                 } else {
 548                         snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown");
 549                 }
 550                 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))];
 551                 LIST_INIT(&sctp_ifnp->ifalist);
 552                 SCTP_IPI_ADDR_WLOCK();
 553                 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket);
 554                 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn);
 555                 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1);
 556                 new_ifn_af = 1;
 557         }
 558         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 559         if (sctp_ifap) {
 560                 /* Hmm, it already exists? */
 561                 if ((sctp_ifap->ifn_p) &&
 562                     (sctp_ifap->ifn_p->ifn_index == ifn_index)) {
 563                         SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n",
 564                             sctp_ifap->ifn_p->ifn_name, ifn_index,
 565                             (void *)sctp_ifap);
 566                         if (new_ifn_af) {
 567                                 /* Remove the created one that we don't want */
 568                                 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED);
 569                         }
 570                         if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) {
 571                                 /* easy to solve, just switch back to active */
 572                                 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n");
 573                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 574                                 sctp_ifap->ifn_p = sctp_ifnp;
 575                                 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1);
 576                         }
 577         exit_stage_left:
 578                         SCTP_IPI_ADDR_WUNLOCK();
 579                         return (sctp_ifap);
 580                 } else {
 581                         if (sctp_ifap->ifn_p) {
 582                                 /*
 583                                  * The last IFN gets the address, remove the
 584                                  * old one
 585                                  */
 586                                 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n",
 587                                     (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name,
 588                                     sctp_ifap->ifn_p->ifn_index, if_name,
 589                                     ifn_index);
 590                                 /* remove the address from the old ifn */
 591                                 sctp_remove_ifa_from_ifn(sctp_ifap);
 592                                 /* move the address over to the new ifn */
 593                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 594                                 goto exit_stage_left;
 595                         } else {
 596                                 /* repair ifnp which was NULL ? */
 597                                 sctp_ifap->localifa_flags = SCTP_ADDR_VALID;
 598                                 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n",
 599                                     (void *)sctp_ifnp, (void *)sctp_ifap);
 600                                 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap);
 601                         }
 602                         goto exit_stage_left;
 603                 }
 604         }
 605         SCTP_IPI_ADDR_WUNLOCK();
 606         SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA);
 607         if (sctp_ifap == NULL) {
 608 #ifdef INVARIANTS
 609                 panic("No memory for IFA");
 610 #endif
 611                 return (NULL);
 612         }
 613         memset(sctp_ifap, 0, sizeof(struct sctp_ifa));
 614         sctp_ifap->ifn_p = sctp_ifnp;
 615         atomic_add_int(&sctp_ifnp->refcount, 1);
 616         sctp_ifap->vrf_id = vrf_id;
 617         sctp_ifap->ifa = ifa;
 618         memcpy(&sctp_ifap->address, addr, addr->sa_len);
 619         sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE;
 620         sctp_ifap->flags = ifa_flags;
 621         /* Set scope */
 622         switch (sctp_ifap->address.sa.sa_family) {
 623 #ifdef INET
 624         case AF_INET:
 625                 {
 626                         struct sockaddr_in *sin;
 627
 628                         sin = &sctp_ifap->address.sin;
 629                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 630                             (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) {
 631                                 sctp_ifap->src_is_loop = 1;
 632                         }
 633                         if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
 634                                 sctp_ifap->src_is_priv = 1;
 635                         }
 636                         sctp_ifnp->num_v4++;
 637                         if (new_ifn_af)
 638                                 new_ifn_af = AF_INET;
 639                         break;
 640                 }
 641 #endif
 642 #ifdef INET6
 643         case AF_INET6:
 644                 {
 645                         /* ok to use deprecated addresses? */
 646                         struct sockaddr_in6 *sin6;
 647
 648                         sin6 = &sctp_ifap->address.sin6;
 649                         if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) ||
 650                             (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) {
 651                                 sctp_ifap->src_is_loop = 1;
 652                         }
 653                         if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 654                                 sctp_ifap->src_is_priv = 1;
 655                         }
 656                         sctp_ifnp->num_v6++;
 657                         if (new_ifn_af)
 658                                 new_ifn_af = AF_INET6;
 659                         break;
 660                 }
 661 #endif
 662         default:
 663                 new_ifn_af = 0;
 664                 break;
 665         }
 666         hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa);
 667
 668         if ((sctp_ifap->src_is_priv == 0) &&
 669             (sctp_ifap->src_is_loop == 0)) {
 670                 sctp_ifap->src_is_glob = 1;
 671         }
 672         SCTP_IPI_ADDR_WLOCK();
 673         hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
 674         LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket);
 675         sctp_ifap->refcount = 1;
 676         LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa);
 677         sctp_ifnp->ifa_count++;
 678         vrf->total_ifa_count++;
 679         atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1);
 680         if (new_ifn_af) {
 681                 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af);
 682                 sctp_ifnp->registered_af = new_ifn_af;
 683         }
 684         SCTP_IPI_ADDR_WUNLOCK();
 685         if (dynamic_add) {
 686                 /*
 687                  * Bump up the refcount so that when the timer completes it
 688                  * will drop back down.
 689                  */
 690                 struct sctp_laddr *wi;
 691
 692                 atomic_add_int(&sctp_ifap->refcount, 1);
 693                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 694                 if (wi == NULL) {
 695                         /*
 696                          * Gak, what can we do? We have lost an address
 697                          * change can you say HOSED?
 698                          */
 699                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 700                         /* Opps, must decrement the count */
 701                         sctp_del_addr_from_vrf(vrf_id, addr, ifn_index,
 702                             if_name);
 703                         return (NULL);
 704                 }
 705                 SCTP_INCR_LADDR_COUNT();
 706                 bzero(wi, sizeof(*wi));
 707                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 708                 wi->ifa = sctp_ifap;
 709                 wi->action = SCTP_ADD_IP_ADDRESS;
 710
 711                 SCTP_WQ_ADDR_LOCK();
 712                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 713                 SCTP_WQ_ADDR_UNLOCK();
 714
 715                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 716                     (struct sctp_inpcb *)NULL,
 717                     (struct sctp_tcb *)NULL,
 718                     (struct sctp_nets *)NULL);
 719         } else {
 720                 /* it's ready for use */
 721                 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
 722         }
 723         return (sctp_ifap);
 724 }
 725
 726 void
 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr,
 728     uint32_t ifn_index, const char *if_name)
 729 {
 730         struct sctp_vrf *vrf;
 731         struct sctp_ifa *sctp_ifap = NULL;
 732
 733         SCTP_IPI_ADDR_WLOCK();
 734         vrf = sctp_find_vrf(vrf_id);
 735         if (vrf == NULL) {
 736                 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id);
 737                 goto out_now;
 738         }
 739 #ifdef SCTP_DEBUG
 740         SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id);
 741         SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr);
 742 #endif
 743         sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED);
 744         if (sctp_ifap) {
 745                 /* Validate the delete */
 746                 if (sctp_ifap->ifn_p) {
 747                         int valid = 0;
 748
 749                         /*-
 750                          * The name has priority over the ifn_index
 751                          * if its given. We do this especially for
 752                          * panda who might recycle indexes fast.
 753                          */
 754                         if (if_name) {
 755                                 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) {
 756                                         /* They match its a correct delete */
 757                                         valid = 1;
 758                                 }
 759                         }
 760                         if (!valid) {
 761                                 /* last ditch check ifn_index */
 762                                 if (ifn_index == sctp_ifap->ifn_p->ifn_index) {
 763                                         valid = 1;
 764                                 }
 765                         }
 766                         if (!valid) {
 767                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n",
 768                                     ifn_index, ((if_name == NULL) ? "NULL" : if_name));
 769                                 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n",
 770                                     sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name);
 771                                 SCTP_IPI_ADDR_WUNLOCK();
 772                                 return;
 773                         }
 774                 }
 775                 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap);
 776                 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID;
 777                 /*
 778                  * We don't set the flag. This means that the structure will
 779                  * hang around in EP's that have bound specific to it until
 780                  * they close. This gives us TCP like behavior if someone
 781                  * removes an address (or for that matter adds it right
 782                  * back).
 783                  */
 784                 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */
 785                 vrf->total_ifa_count--;
 786                 LIST_REMOVE(sctp_ifap, next_bucket);
 787                 sctp_remove_ifa_from_ifn(sctp_ifap);
 788         }
 789 #ifdef SCTP_DEBUG
 790         else {
 791                 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:",
 792                     ifn_index);
 793                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
 794         }
 795 #endif
 796
 797 out_now:
 798         SCTP_IPI_ADDR_WUNLOCK();
 799         if (sctp_ifap) {
 800                 struct sctp_laddr *wi;
 801
 802                 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
 803                 if (wi == NULL) {
 804                         /*
 805                          * Gak, what can we do? We have lost an address
 806                          * change can you say HOSED?
 807                          */
 808                         SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n");
 809
 810                         /* Oops, must decrement the count */
 811                         sctp_free_ifa(sctp_ifap);
 812                         return;
 813                 }
 814                 SCTP_INCR_LADDR_COUNT();
 815                 bzero(wi, sizeof(*wi));
 816                 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
 817                 wi->ifa = sctp_ifap;
 818                 wi->action = SCTP_DEL_IP_ADDRESS;
 819                 SCTP_WQ_ADDR_LOCK();
 820                 /*
 821                  * Should this really be a tailq? As it is we will process
 822                  * the newest first :-0
 823                  */
 824                 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
 825                 SCTP_WQ_ADDR_UNLOCK();
 826
 827                 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
 828                     (struct sctp_inpcb *)NULL,
 829                     (struct sctp_tcb *)NULL,
 830                     (struct sctp_nets *)NULL);
 831         }
 832         return;
 833 }
 834
 835
 836 static int
 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to)
 838 {
 839         int loopback_scope;
 840
 841 #if defined(INET)
 842         int ipv4_local_scope, ipv4_addr_legal;
 843
 844 #endif
 845 #if defined(INET6)
 846         int local_scope, site_scope, ipv6_addr_legal;
 847
 848 #endif
 849         struct sctp_vrf *vrf;
 850         struct sctp_ifn *sctp_ifn;
 851         struct sctp_ifa *sctp_ifa;
 852
 853         loopback_scope = stcb->asoc.scope.loopback_scope;
 854 #if defined(INET)
 855         ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope;
 856         ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal;
 857 #endif
 858 #if defined(INET6)
 859         local_scope = stcb->asoc.scope.local_scope;
 860         site_scope = stcb->asoc.scope.site_scope;
 861         ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal;
 862 #endif
 863
 864         SCTP_IPI_ADDR_RLOCK();
 865         vrf = sctp_find_vrf(stcb->asoc.vrf_id);
 866         if (vrf == NULL) {
 867                 /* no vrf, no addresses */
 868                 SCTP_IPI_ADDR_RUNLOCK();
 869                 return (0);
 870         }
 871         if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
 872                 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
 873                         if ((loopback_scope == 0) &&
 874                             SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
 875                                 continue;
 876                         }
 877                         LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
 878                                 if (sctp_is_addr_restricted(stcb, sctp_ifa) &&
 879                                     (!sctp_is_addr_pending(stcb, sctp_ifa))) {
 880                                         /*
 881                                          * We allow pending addresses, where
 882                                          * we have sent an asconf-add to be
 883                                          * considered valid.
 884                                          */
 885                                         continue;
 886                                 }
 887                                 if (sctp_ifa->address.sa.sa_family != to->sa_family) {
 888                                         continue;
 889                                 }
 890                                 switch (sctp_ifa->address.sa.sa_family) {
 891 #ifdef INET
 892                                 case AF_INET:
 893                                         if (ipv4_addr_legal) {
 894                                                 struct sockaddr_in *sin,
 895                                                            *rsin;
 896
 897                                                 sin = &sctp_ifa->address.sin;
 898                                                 rsin = (struct sockaddr_in *)to;
 899                                                 if ((ipv4_local_scope == 0) &&
 900                                                     IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
 901                                                         continue;
 902                                                 }
 903                                                 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred,
 904                                                     &sin->sin_addr) != 0) {
 905                                                         continue;
 906                                                 }
 907                                                 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 908                                                         SCTP_IPI_ADDR_RUNLOCK();
 909                                                         return (1);
 910                                                 }
 911                                         }
 912                                         break;
 913 #endif
 914 #ifdef INET6
 915                                 case AF_INET6:
 916                                         if (ipv6_addr_legal) {
 917                                                 struct sockaddr_in6 *sin6,
 918                                                             *rsin6;
 919
 920                                                 sin6 = &sctp_ifa->address.sin6;
 921                                                 rsin6 = (struct sockaddr_in6 *)to;
 922                                                 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred,
 923                                                     &sin6->sin6_addr) != 0) {
 924                                                         continue;
 925                                                 }
 926                                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
 927                                                         if (local_scope == 0)
 928                                                                 continue;
 929                                                         if (sin6->sin6_scope_id == 0) {
 930                                                                 if (sa6_recoverscope(sin6) != 0)
 931                                                                         continue;
 932                                                         }
 933                                                 }
 934                                                 if ((site_scope == 0) &&
 935                                                     (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
 936                                                         continue;
 937                                                 }
 938                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 939                                                         SCTP_IPI_ADDR_RUNLOCK();
 940                                                         return (1);
 941                                                 }
 942                                         }
 943                                         break;
 944 #endif
 945                                 default:
 946                                         /* TSNH */
 947                                         break;
 948                                 }
 949                         }
 950                 }
 951         } else {
 952                 struct sctp_laddr *laddr;
 953
 954                 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) {
 955                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
 956                                 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
 957                                 continue;
 958                         }
 959                         if (sctp_is_addr_restricted(stcb, laddr->ifa) &&
 960                             (!sctp_is_addr_pending(stcb, laddr->ifa))) {
 961                                 /*
 962                                  * We allow pending addresses, where we have
 963                                  * sent an asconf-add to be considered
 964                                  * valid.
 965                                  */
 966                                 continue;
 967                         }
 968                         if (laddr->ifa->address.sa.sa_family != to->sa_family) {
 969                                 continue;
 970                         }
 971                         switch (to->sa_family) {
 972 #ifdef INET
 973                         case AF_INET:
 974                                 {
 975                                         struct sockaddr_in *sin, *rsin;
 976
 977                                         sin = &laddr->ifa->address.sin;
 978                                         rsin = (struct sockaddr_in *)to;
 979                                         if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) {
 980                                                 SCTP_IPI_ADDR_RUNLOCK();
 981                                                 return (1);
 982                                         }
 983                                         break;
 984                                 }
 985 #endif
 986 #ifdef INET6
 987                         case AF_INET6:
 988                                 {
 989                                         struct sockaddr_in6 *sin6, *rsin6;
 990
 991                                         sin6 = &laddr->ifa->address.sin6;
 992                                         rsin6 = (struct sockaddr_in6 *)to;
 993                                         if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) {
 994                                                 SCTP_IPI_ADDR_RUNLOCK();
 995                                                 return (1);
 996                                         }
 997                                         break;
 998                                 }
 999
1000 #endif
1001                         default:
1002                                 /* TSNH */
1003                                 break;
1004                         }
1005
1006                 }
1007         }
1008         SCTP_IPI_ADDR_RUNLOCK();
1009         return (0);
1010 }
1011
1012
1013 static struct sctp_tcb *
1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from,
1015     struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id)
1016 {
1017         /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */
1018         /*
1019          * If we support the TCP model, then we must now dig through to see
1020          * if we can find our endpoint in the list of tcp ep's.
1021          */
1022         uint16_t lport, rport;
1023         struct sctppcbhead *ephead;
1024         struct sctp_inpcb *inp;
1025         struct sctp_laddr *laddr;
1026         struct sctp_tcb *stcb;
1027         struct sctp_nets *net;
1028
1029         if ((to == NULL) || (from == NULL)) {
1030                 return (NULL);
1031         }
1032         switch (to->sa_family) {
1033 #ifdef INET
1034         case AF_INET:
1035                 if (from->sa_family == AF_INET) {
1036                         lport = ((struct sockaddr_in *)to)->sin_port;
1037                         rport = ((struct sockaddr_in *)from)->sin_port;
1038                 } else {
1039                         return (NULL);
1040                 }
1041                 break;
1042 #endif
1043 #ifdef INET6
1044         case AF_INET6:
1045                 if (from->sa_family == AF_INET6) {
1046                         lport = ((struct sockaddr_in6 *)to)->sin6_port;
1047                         rport = ((struct sockaddr_in6 *)from)->sin6_port;
1048                 } else {
1049                         return (NULL);
1050                 }
1051                 break;
1052 #endif
1053         default:
1054                 return (NULL);
1055         }
1056         ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
1057         /*
1058          * Ok now for each of the guys in this bucket we must look and see:
1059          * - Does the remote port match. - Does there single association's
1060          * addresses match this address (to). If so we update p_ep to point
1061          * to this ep and return the tcb from it.
1062          */
1063         LIST_FOREACH(inp, ephead, sctp_hash) {
1064                 SCTP_INP_RLOCK(inp);
1065                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1066                         SCTP_INP_RUNLOCK(inp);
1067                         continue;
1068                 }
1069                 if (lport != inp->sctp_lport) {
1070                         SCTP_INP_RUNLOCK(inp);
1071                         continue;
1072                 }
1073                 switch (to->sa_family) {
1074 #ifdef INET
1075                 case AF_INET:
1076                         {
1077                                 struct sockaddr_in *sin;
1078
1079                                 sin = (struct sockaddr_in *)to;
1080                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1081                                     &sin->sin_addr) != 0) {
1082                                         SCTP_INP_RUNLOCK(inp);
1083                                         continue;
1084                                 }
1085                                 break;
1086                         }
1087 #endif
1088 #ifdef INET6
1089                 case AF_INET6:
1090                         {
1091                                 struct sockaddr_in6 *sin6;
1092
1093                                 sin6 = (struct sockaddr_in6 *)to;
1094                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1095                                     &sin6->sin6_addr) != 0) {
1096                                         SCTP_INP_RUNLOCK(inp);
1097                                         continue;
1098                                 }
1099                                 break;
1100                         }
1101 #endif
1102                 default:
1103                         SCTP_INP_RUNLOCK(inp);
1104                         continue;
1105                 }
1106                 if (inp->def_vrf_id != vrf_id) {
1107                         SCTP_INP_RUNLOCK(inp);
1108                         continue;
1109                 }
1110                 /* check to see if the ep has one of the addresses */
1111                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
1112                         /* We are NOT bound all, so look further */
1113                         int match = 0;
1114
1115                         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1116
1117                                 if (laddr->ifa == NULL) {
1118                                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__);
1119                                         continue;
1120                                 }
1121                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1122                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1123                                         continue;
1124                                 }
1125                                 if (laddr->ifa->address.sa.sa_family ==
1126                                     to->sa_family) {
1127                                         /* see if it matches */
1128 #ifdef INET
1129                                         if (from->sa_family == AF_INET) {
1130                                                 struct sockaddr_in *intf_addr,
1131                                                            *sin;
1132
1133                                                 intf_addr = &laddr->ifa->address.sin;
1134                                                 sin = (struct sockaddr_in *)to;
1135                                                 if (sin->sin_addr.s_addr ==
1136                                                     intf_addr->sin_addr.s_addr) {
1137                                                         match = 1;
1138                                                         break;
1139                                                 }
1140                                         }
1141 #endif
1142 #ifdef INET6
1143                                         if (from->sa_family == AF_INET6) {
1144                                                 struct sockaddr_in6 *intf_addr6;
1145                                                 struct sockaddr_in6 *sin6;
1146
1147                                                 sin6 = (struct sockaddr_in6 *)
1148                                                     to;
1149                                                 intf_addr6 = &laddr->ifa->address.sin6;
1150
1151                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1152                                                     intf_addr6)) {
1153                                                         match = 1;
1154                                                         break;
1155                                                 }
1156                                         }
1157 #endif
1158                                 }
1159                         }
1160                         if (match == 0) {
1161                                 /* This endpoint does not have this address */
1162                                 SCTP_INP_RUNLOCK(inp);
1163                                 continue;
1164                         }
1165                 }
1166                 /*
1167                  * Ok if we hit here the ep has the address, does it hold
1168                  * the tcb?
1169                  */
1170                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1171                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1172                 if (stcb == NULL) {
1173                         SCTP_INP_RUNLOCK(inp);
1174                         continue;
1175                 }
1176                 SCTP_TCB_LOCK(stcb);
1177                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1178                         SCTP_TCB_UNLOCK(stcb);
1179                         SCTP_INP_RUNLOCK(inp);
1180                         continue;
1181                 }
1182                 if (stcb->rport != rport) {
1183                         /* remote port does not match. */
1184                         SCTP_TCB_UNLOCK(stcb);
1185                         SCTP_INP_RUNLOCK(inp);
1186                         continue;
1187                 }
1188                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1189                         SCTP_TCB_UNLOCK(stcb);
1190                         SCTP_INP_RUNLOCK(inp);
1191                         continue;
1192                 }
1193                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1194                         SCTP_TCB_UNLOCK(stcb);
1195                         SCTP_INP_RUNLOCK(inp);
1196                         continue;
1197                 }
1198                 /* Does this TCB have a matching address? */
1199                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1200
1201                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1202                                 /* not the same family, can't be a match */
1203                                 continue;
1204                         }
1205                         switch (from->sa_family) {
1206 #ifdef INET
1207                         case AF_INET:
1208                                 {
1209                                         struct sockaddr_in *sin, *rsin;
1210
1211                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1212                                         rsin = (struct sockaddr_in *)from;
1213                                         if (sin->sin_addr.s_addr ==
1214                                             rsin->sin_addr.s_addr) {
1215                                                 /* found it */
1216                                                 if (netp != NULL) {
1217                                                         *netp = net;
1218                                                 }
1219                                                 /*
1220                                                  * Update the endpoint
1221                                                  * pointer
1222                                                  */
1223                                                 *inp_p = inp;
1224                                                 SCTP_INP_RUNLOCK(inp);
1225                                                 return (stcb);
1226                                         }
1227                                         break;
1228                                 }
1229 #endif
1230 #ifdef INET6
1231                         case AF_INET6:
1232                                 {
1233                                         struct sockaddr_in6 *sin6, *rsin6;
1234
1235                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1236                                         rsin6 = (struct sockaddr_in6 *)from;
1237                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1238                                             rsin6)) {
1239                                                 /* found it */
1240                                                 if (netp != NULL) {
1241                                                         *netp = net;
1242                                                 }
1243                                                 /*
1244                                                  * Update the endpoint
1245                                                  * pointer
1246                                                  */
1247                                                 *inp_p = inp;
1248                                                 SCTP_INP_RUNLOCK(inp);
1249                                                 return (stcb);
1250                                         }
1251                                         break;
1252                                 }
1253 #endif
1254                         default:
1255                                 /* TSNH */
1256                                 break;
1257                         }
1258                 }
1259                 SCTP_TCB_UNLOCK(stcb);
1260                 SCTP_INP_RUNLOCK(inp);
1261         }
1262         return (NULL);
1263 }
1264
1265
1266 /*
1267  * rules for use
1268  *
1269  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1270  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1271  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1272  * NULL.
1273  */
1274
1275 struct sctp_tcb *
1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1277     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1278 {
1279         struct sctpasochead *head;
1280         struct sctp_inpcb *inp;
1281         struct sctp_tcb *stcb = NULL;
1282         struct sctp_nets *net;
1283         uint16_t rport;
1284
1285         inp = *inp_p;
1286         switch (remote->sa_family) {
1287 #ifdef INET
1288         case AF_INET:
1289                 rport = (((struct sockaddr_in *)remote)->sin_port);
1290                 break;
1291 #endif
1292 #ifdef INET6
1293         case AF_INET6:
1294                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1295                 break;
1296 #endif
1297         default:
1298                 return (NULL);
1299         }
1300         if (locked_tcb) {
1301                 /*
1302                  * UN-lock so we can do proper locking here this occurs when
1303                  * called from load_addresses_from_init.
1304                  */
1305                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1306                 SCTP_TCB_UNLOCK(locked_tcb);
1307         }
1308         SCTP_INP_INFO_RLOCK();
1309         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1310             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1311                 /*-
1312                  * Now either this guy is our listener or it's the
1313                  * connector. If it is the one that issued the connect, then
1314                  * it's only chance is to be the first TCB in the list. If
1315                  * it is the acceptor, then do the special_lookup to hash
1316                  * and find the real inp.
1317                  */
1318                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1319                         /* to is peer addr, from is my addr */
1320                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1321                             netp, inp->def_vrf_id);
1322                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1323                                 /* we have a locked tcb, lower refcount */
1324                                 SCTP_INP_DECR_REF(inp);
1325                         }
1326                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1327                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1328                                 SCTP_TCB_LOCK(locked_tcb);
1329                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1330                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1331                         }
1332                         SCTP_INP_INFO_RUNLOCK();
1333                         return (stcb);
1334                 } else {
1335                         SCTP_INP_WLOCK(inp);
1336                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1337                                 goto null_return;
1338                         }
1339                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1340                         if (stcb == NULL) {
1341                                 goto null_return;
1342                         }
1343                         SCTP_TCB_LOCK(stcb);
1344
1345                         if (stcb->rport != rport) {
1346                                 /* remote port does not match. */
1347                                 SCTP_TCB_UNLOCK(stcb);
1348                                 goto null_return;
1349                         }
1350                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1351                                 SCTP_TCB_UNLOCK(stcb);
1352                                 goto null_return;
1353                         }
1354                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1355                                 SCTP_TCB_UNLOCK(stcb);
1356                                 goto null_return;
1357                         }
1358                         /* now look at the list of remote addresses */
1359                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1360 #ifdef INVARIANTS
1361                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1362                                         panic("Corrupt net list");
1363                                 }
1364 #endif
1365                                 if (net->ro._l_addr.sa.sa_family !=
1366                                     remote->sa_family) {
1367                                         /* not the same family */
1368                                         continue;
1369                                 }
1370                                 switch (remote->sa_family) {
1371 #ifdef INET
1372                                 case AF_INET:
1373                                         {
1374                                                 struct sockaddr_in *sin,
1375                                                            *rsin;
1376
1377                                                 sin = (struct sockaddr_in *)
1378                                                     &net->ro._l_addr;
1379                                                 rsin = (struct sockaddr_in *)remote;
1380                                                 if (sin->sin_addr.s_addr ==
1381                                                     rsin->sin_addr.s_addr) {
1382                                                         /* found it */
1383                                                         if (netp != NULL) {
1384                                                                 *netp = net;
1385                                                         }
1386                                                         if (locked_tcb == NULL) {
1387                                                                 SCTP_INP_DECR_REF(inp);
1388                                                         } else if (locked_tcb != stcb) {
1389                                                                 SCTP_TCB_LOCK(locked_tcb);
1390                                                         }
1391                                                         if (locked_tcb) {
1392                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1393                                                         }
1394                                                         SCTP_INP_WUNLOCK(inp);
1395                                                         SCTP_INP_INFO_RUNLOCK();
1396                                                         return (stcb);
1397                                                 }
1398                                                 break;
1399                                         }
1400 #endif
1401 #ifdef INET6
1402                                 case AF_INET6:
1403                                         {
1404                                                 struct sockaddr_in6 *sin6,
1405                                                             *rsin6;
1406
1407                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1408                                                 rsin6 = (struct sockaddr_in6 *)remote;
1409                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1410                                                     rsin6)) {
1411                                                         /* found it */
1412                                                         if (netp != NULL) {
1413                                                                 *netp = net;
1414                                                         }
1415                                                         if (locked_tcb == NULL) {
1416                                                                 SCTP_INP_DECR_REF(inp);
1417                                                         } else if (locked_tcb != stcb) {
1418                                                                 SCTP_TCB_LOCK(locked_tcb);
1419                                                         }
1420                                                         if (locked_tcb) {
1421                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1422                                                         }
1423                                                         SCTP_INP_WUNLOCK(inp);
1424                                                         SCTP_INP_INFO_RUNLOCK();
1425                                                         return (stcb);
1426                                                 }
1427                                                 break;
1428                                         }
1429 #endif
1430                                 default:
1431                                         /* TSNH */
1432                                         break;
1433                                 }
1434                         }
1435                         SCTP_TCB_UNLOCK(stcb);
1436                 }
1437         } else {
1438                 SCTP_INP_WLOCK(inp);
1439                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1440                         goto null_return;
1441                 }
1442                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1443                     inp->sctp_hashmark)];
1444                 LIST_FOREACH(stcb, head, sctp_tcbhash) {
1445                         if (stcb->rport != rport) {
1446                                 /* remote port does not match */
1447                                 continue;
1448                         }
1449                         SCTP_TCB_LOCK(stcb);
1450                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1451                                 SCTP_TCB_UNLOCK(stcb);
1452                                 continue;
1453                         }
1454                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1455                                 SCTP_TCB_UNLOCK(stcb);
1456                                 continue;
1457                         }
1458                         /* now look at the list of remote addresses */
1459                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1460 #ifdef INVARIANTS
1461                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1462                                         panic("Corrupt net list");
1463                                 }
1464 #endif
1465                                 if (net->ro._l_addr.sa.sa_family !=
1466                                     remote->sa_family) {
1467                                         /* not the same family */
1468                                         continue;
1469                                 }
1470                                 switch (remote->sa_family) {
1471 #ifdef INET
1472                                 case AF_INET:
1473                                         {
1474                                                 struct sockaddr_in *sin,
1475                                                            *rsin;
1476
1477                                                 sin = (struct sockaddr_in *)
1478                                                     &net->ro._l_addr;
1479                                                 rsin = (struct sockaddr_in *)remote;
1480                                                 if (sin->sin_addr.s_addr ==
1481                                                     rsin->sin_addr.s_addr) {
1482                                                         /* found it */
1483                                                         if (netp != NULL) {
1484                                                                 *netp = net;
1485                                                         }
1486                                                         if (locked_tcb == NULL) {
1487                                                                 SCTP_INP_DECR_REF(inp);
1488                                                         } else if (locked_tcb != stcb) {
1489                                                                 SCTP_TCB_LOCK(locked_tcb);
1490                                                         }
1491                                                         if (locked_tcb) {
1492                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1493                                                         }
1494                                                         SCTP_INP_WUNLOCK(inp);
1495                                                         SCTP_INP_INFO_RUNLOCK();
1496                                                         return (stcb);
1497                                                 }
1498                                                 break;
1499                                         }
1500 #endif
1501 #ifdef INET6
1502                                 case AF_INET6:
1503                                         {
1504                                                 struct sockaddr_in6 *sin6,
1505                                                             *rsin6;
1506
1507                                                 sin6 = (struct sockaddr_in6 *)
1508                                                     &net->ro._l_addr;
1509                                                 rsin6 = (struct sockaddr_in6 *)remote;
1510                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1511                                                     rsin6)) {
1512                                                         /* found it */
1513                                                         if (netp != NULL) {
1514                                                                 *netp = net;
1515                                                         }
1516                                                         if (locked_tcb == NULL) {
1517                                                                 SCTP_INP_DECR_REF(inp);
1518                                                         } else if (locked_tcb != stcb) {
1519                                                                 SCTP_TCB_LOCK(locked_tcb);
1520                                                         }
1521                                                         if (locked_tcb) {
1522                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1523                                                         }
1524                                                         SCTP_INP_WUNLOCK(inp);
1525                                                         SCTP_INP_INFO_RUNLOCK();
1526                                                         return (stcb);
1527                                                 }
1528                                                 break;
1529                                         }
1530 #endif
1531                                 default:
1532                                         /* TSNH */
1533                                         break;
1534                                 }
1535                         }
1536                         SCTP_TCB_UNLOCK(stcb);
1537                 }
1538         }
1539 null_return:
1540         /* clean up for returning null */
1541         if (locked_tcb) {
1542                 SCTP_TCB_LOCK(locked_tcb);
1543                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1544         }
1545         SCTP_INP_WUNLOCK(inp);
1546         SCTP_INP_INFO_RUNLOCK();
1547         /* not found */
1548         return (NULL);
1549 }
1550
1551
1552 /*
1553  * Find an association for a specific endpoint using the association id given
1554  * out in the COMM_UP notification
1555  */
1556 struct sctp_tcb *
1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1558 {
1559         /*
1560          * Use my the assoc_id to find a endpoint
1561          */
1562         struct sctpasochead *head;
1563         struct sctp_tcb *stcb;
1564         uint32_t id;
1565
1566         if (inp == NULL) {
1567                 SCTP_PRINTF("TSNH ep_associd\n");
1568                 return (NULL);
1569         }
1570         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1571                 SCTP_PRINTF("TSNH ep_associd0\n");
1572                 return (NULL);
1573         }
1574         id = (uint32_t) asoc_id;
1575         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
1576         if (head == NULL) {
1577                 /* invalid id TSNH */
1578                 SCTP_PRINTF("TSNH ep_associd1\n");
1579                 return (NULL);
1580         }
1581         LIST_FOREACH(stcb, head, sctp_tcbasocidhash) {
1582                 if (stcb->asoc.assoc_id == id) {
1583                         if (inp != stcb->sctp_ep) {
1584                                 /*
1585                                  * some other guy has the same id active (id
1586                                  * collision ??).
1587                                  */
1588                                 SCTP_PRINTF("TSNH ep_associd2\n");
1589                                 continue;
1590                         }
1591                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1592                                 continue;
1593                         }
1594                         if (want_lock) {
1595                                 SCTP_TCB_LOCK(stcb);
1596                         }
1597                         return (stcb);
1598                 }
1599         }
1600         return (NULL);
1601 }
1602
1603
1604 struct sctp_tcb *
1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock)
1606 {
1607         struct sctp_tcb *stcb;
1608
1609         SCTP_INP_RLOCK(inp);
1610         stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock);
1611         SCTP_INP_RUNLOCK(inp);
1612         return (stcb);
1613 }
1614
1615
1616 /*
1617  * Endpoint probe expects that the INP_INFO is locked.
1618  */
1619 static struct sctp_inpcb *
1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head,
1621     uint16_t lport, uint32_t vrf_id)
1622 {
1623         struct sctp_inpcb *inp;
1624         struct sctp_laddr *laddr;
1625
1626 #ifdef INET
1627         struct sockaddr_in *sin;
1628
1629 #endif
1630 #ifdef INET6
1631         struct sockaddr_in6 *sin6;
1632         struct sockaddr_in6 *intf_addr6;
1633
1634 #endif
1635         int fnd;
1636
1637 #ifdef INET
1638         sin = NULL;
1639 #endif
1640 #ifdef INET6
1641         sin6 = NULL;
1642 #endif
1643         switch (nam->sa_family) {
1644 #ifdef INET
1645         case AF_INET:
1646                 sin = (struct sockaddr_in *)nam;
1647                 break;
1648 #endif
1649 #ifdef INET6
1650         case AF_INET6:
1651                 sin6 = (struct sockaddr_in6 *)nam;
1652                 break;
1653 #endif
1654         default:
1655                 /* unsupported family */
1656                 return (NULL);
1657         }
1658
1659         if (head == NULL)
1660                 return (NULL);
1661
1662         LIST_FOREACH(inp, head, sctp_hash) {
1663                 SCTP_INP_RLOCK(inp);
1664                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1665                         SCTP_INP_RUNLOCK(inp);
1666                         continue;
1667                 }
1668                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) &&
1669                     (inp->sctp_lport == lport)) {
1670                         /* got it */
1671                         switch (nam->sa_family) {
1672 #ifdef INET
1673                         case AF_INET:
1674                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1675                                     SCTP_IPV6_V6ONLY(inp)) {
1676                                         /*
1677                                          * IPv4 on a IPv6 socket with ONLY
1678                                          * IPv6 set
1679                                          */
1680                                         SCTP_INP_RUNLOCK(inp);
1681                                         continue;
1682                                 }
1683                                 if (prison_check_ip4(inp->ip_inp.inp.inp_cred,
1684                                     &sin->sin_addr) != 0) {
1685                                         SCTP_INP_RUNLOCK(inp);
1686                                         continue;
1687                                 }
1688                                 break;
1689 #endif
1690 #ifdef INET6
1691                         case AF_INET6:
1692                                 /*
1693                                  * A V6 address and the endpoint is NOT
1694                                  * bound V6
1695                                  */
1696                                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
1697                                         SCTP_INP_RUNLOCK(inp);
1698                                         continue;
1699                                 }
1700                                 if (prison_check_ip6(inp->ip_inp.inp.inp_cred,
1701                                     &sin6->sin6_addr) != 0) {
1702                                         SCTP_INP_RUNLOCK(inp);
1703                                         continue;
1704                                 }
1705                                 break;
1706 #endif
1707                         default:
1708                                 break;
1709                         }
1710                         /* does a VRF id match? */
1711                         fnd = 0;
1712                         if (inp->def_vrf_id == vrf_id)
1713                                 fnd = 1;
1714
1715                         SCTP_INP_RUNLOCK(inp);
1716                         if (!fnd)
1717                                 continue;
1718                         return (inp);
1719                 }
1720                 SCTP_INP_RUNLOCK(inp);
1721         }
1722         switch (nam->sa_family) {
1723 #ifdef INET
1724         case AF_INET:
1725                 if (sin->sin_addr.s_addr == INADDR_ANY) {
1726                         /* Can't hunt for one that has no address specified */
1727                         return (NULL);
1728                 }
1729                 break;
1730 #endif
1731 #ifdef INET6
1732         case AF_INET6:
1733                 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1734                         /* Can't hunt for one that has no address specified */
1735                         return (NULL);
1736                 }
1737                 break;
1738 #endif
1739         default:
1740                 break;
1741         }
1742         /*
1743          * ok, not bound to all so see if we can find a EP bound to this
1744          * address.
1745          */
1746         LIST_FOREACH(inp, head, sctp_hash) {
1747                 SCTP_INP_RLOCK(inp);
1748                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1749                         SCTP_INP_RUNLOCK(inp);
1750                         continue;
1751                 }
1752                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) {
1753                         SCTP_INP_RUNLOCK(inp);
1754                         continue;
1755                 }
1756                 /*
1757                  * Ok this could be a likely candidate, look at all of its
1758                  * addresses
1759                  */
1760                 if (inp->sctp_lport != lport) {
1761                         SCTP_INP_RUNLOCK(inp);
1762                         continue;
1763                 }
1764                 /* does a VRF id match? */
1765                 fnd = 0;
1766                 if (inp->def_vrf_id == vrf_id)
1767                         fnd = 1;
1768
1769                 if (!fnd) {
1770                         SCTP_INP_RUNLOCK(inp);
1771                         continue;
1772                 }
1773                 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
1774                         if (laddr->ifa == NULL) {
1775                                 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
1776                                     __func__);
1777                                 continue;
1778                         }
1779                         SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ",
1780                             (void *)laddr->ifa);
1781                         if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1782                                 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n");
1783                                 continue;
1784                         }
1785                         if (laddr->ifa->address.sa.sa_family == nam->sa_family) {
1786                                 /* possible, see if it matches */
1787                                 switch (nam->sa_family) {
1788 #ifdef INET
1789                                 case AF_INET:
1790                                         if (sin->sin_addr.s_addr ==
1791                                             laddr->ifa->address.sin.sin_addr.s_addr) {
1792                                                 SCTP_INP_RUNLOCK(inp);
1793                                                 return (inp);
1794                                         }
1795                                         break;
1796 #endif
1797 #ifdef INET6
1798                                 case AF_INET6:
1799                                         intf_addr6 = &laddr->ifa->address.sin6;
1800                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1801                                             intf_addr6)) {
1802                                                 SCTP_INP_RUNLOCK(inp);
1803                                                 return (inp);
1804                                         }
1805                                         break;
1806 #endif
1807                                 }
1808                         }
1809                 }
1810                 SCTP_INP_RUNLOCK(inp);
1811         }
1812         return (NULL);
1813 }
1814
1815
1816 static struct sctp_inpcb *
1817 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id)
1818 {
1819         struct sctppcbhead *head;
1820         struct sctp_inpcb *t_inp;
1821         int fnd;
1822
1823         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1824             SCTP_BASE_INFO(hashmark))];
1825         LIST_FOREACH(t_inp, head, sctp_hash) {
1826                 if (t_inp->sctp_lport != lport) {
1827                         continue;
1828                 }
1829                 /* is it in the VRF in question */
1830                 fnd = 0;
1831                 if (t_inp->def_vrf_id == vrf_id)
1832                         fnd = 1;
1833                 if (!fnd)
1834                         continue;
1835
1836                 /* This one is in use. */
1837                 /* check the v6/v4 binding issue */
1838                 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1839                     SCTP_IPV6_V6ONLY(t_inp)) {
1840                         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1841                                 /* collision in V6 space */
1842                                 return (t_inp);
1843                         } else {
1844                                 /* inp is BOUND_V4 no conflict */
1845                                 continue;
1846                         }
1847                 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
1848                         /* t_inp is bound v4 and v6, conflict always */
1849                         return (t_inp);
1850                 } else {
1851                         /* t_inp is bound only V4 */
1852                         if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
1853                             SCTP_IPV6_V6ONLY(inp)) {
1854                                 /* no conflict */
1855                                 continue;
1856                         }
1857                         /* else fall through to conflict */
1858                 }
1859                 return (t_inp);
1860         }
1861         return (NULL);
1862 }
1863
1864
1865 int
1866 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp)
1867 {
1868         /* For 1-2-1 with port reuse */
1869         struct sctppcbhead *head;
1870         struct sctp_inpcb *tinp, *ninp;
1871
1872         if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) {
1873                 /* only works with port reuse on */
1874                 return (-1);
1875         }
1876         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) {
1877                 return (0);
1878         }
1879         SCTP_INP_RUNLOCK(inp);
1880         SCTP_INP_INFO_WLOCK();
1881         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1882             SCTP_BASE_INFO(hashmark))];
1883         /* Kick out all non-listeners to the TCP hash */
1884         LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) {
1885                 if (tinp->sctp_lport != inp->sctp_lport) {
1886                         continue;
1887                 }
1888                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1889                         continue;
1890                 }
1891                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1892                         continue;
1893                 }
1894                 if (tinp->sctp_socket->so_qlimit) {
1895                         continue;
1896                 }
1897                 SCTP_INP_WLOCK(tinp);
1898                 LIST_REMOVE(tinp, sctp_hash);
1899                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1900                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1901                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1902                 SCTP_INP_WUNLOCK(tinp);
1903         }
1904         SCTP_INP_WLOCK(inp);
1905         /* Pull from where he was */
1906         LIST_REMOVE(inp, sctp_hash);
1907         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1908         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1909         LIST_INSERT_HEAD(head, inp, sctp_hash);
1910         SCTP_INP_WUNLOCK(inp);
1911         SCTP_INP_RLOCK(inp);
1912         SCTP_INP_INFO_WUNLOCK();
1913         return (0);
1914 }
1915
1916
1917 struct sctp_inpcb *
1918 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1919     uint32_t vrf_id)
1920 {
1921         /*
1922          * First we check the hash table to see if someone has this port
1923          * bound with just the port.
1924          */
1925         struct sctp_inpcb *inp;
1926         struct sctppcbhead *head;
1927         int lport;
1928         unsigned int i;
1929
1930 #ifdef INET
1931         struct sockaddr_in *sin;
1932
1933 #endif
1934 #ifdef INET6
1935         struct sockaddr_in6 *sin6;
1936
1937 #endif
1938
1939         switch (nam->sa_family) {
1940 #ifdef INET
1941         case AF_INET:
1942                 sin = (struct sockaddr_in *)nam;
1943                 lport = sin->sin_port;
1944                 break;
1945 #endif
1946 #ifdef INET6
1947         case AF_INET6:
1948                 sin6 = (struct sockaddr_in6 *)nam;
1949                 lport = sin6->sin6_port;
1950                 break;
1951 #endif
1952         default:
1953                 return (NULL);
1954         }
1955         /*
1956          * I could cheat here and just cast to one of the types but we will
1957          * do it right. It also provides the check against an Unsupported
1958          * type too.
1959          */
1960         /* Find the head of the ALLADDR chain */
1961         if (have_lock == 0) {
1962                 SCTP_INP_INFO_RLOCK();
1963         }
1964         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1965             SCTP_BASE_INFO(hashmark))];
1966         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1967
1968         /*
1969          * If the TCP model exists it could be that the main listening
1970          * endpoint is gone but there still exists a connected socket for
1971          * this guy. If so we can return the first one that we find. This
1972          * may NOT be the correct one so the caller should be wary on the
1973          * returned INP. Currently the only caller that sets find_tcp_pool
1974          * is in bindx where we are verifying that a user CAN bind the
1975          * address. He either has bound it already, or someone else has, or
1976          * its open to bind, so this is good enough.
1977          */
1978         if (inp == NULL && find_tcp_pool) {
1979                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1980                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1981                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1982                         if (inp) {
1983                                 break;
1984                         }
1985                 }
1986         }
1987         if (inp) {
1988                 SCTP_INP_INCR_REF(inp);
1989         }
1990         if (have_lock == 0) {
1991                 SCTP_INP_INFO_RUNLOCK();
1992         }
1993         return (inp);
1994 }
1995
1996
1997 /*
1998  * Find an association for an endpoint with the pointer to whom you want to
1999  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
2000  * need to change the *to to some other struct like a mbuf...
2001  */
2002 struct sctp_tcb *
2003 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2004     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2005     uint32_t vrf_id)
2006 {
2007         struct sctp_inpcb *inp = NULL;
2008         struct sctp_tcb *stcb;
2009
2010         SCTP_INP_INFO_RLOCK();
2011         if (find_tcp_pool) {
2012                 if (inp_p != NULL) {
2013                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2014                             vrf_id);
2015                 } else {
2016                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2017                             vrf_id);
2018                 }
2019                 if (stcb != NULL) {
2020                         SCTP_INP_INFO_RUNLOCK();
2021                         return (stcb);
2022                 }
2023         }
2024         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2025         if (inp_p != NULL) {
2026                 *inp_p = inp;
2027         }
2028         SCTP_INP_INFO_RUNLOCK();
2029         if (inp == NULL) {
2030                 return (NULL);
2031         }
2032         /*
2033          * ok, we have an endpoint, now lets find the assoc for it (if any)
2034          * we now place the source address or from in the to of the find
2035          * endpoint call. Since in reality this chain is used from the
2036          * inbound packet side.
2037          */
2038         if (inp_p != NULL) {
2039                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2040                     NULL);
2041         } else {
2042                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2043                     NULL);
2044         }
2045         return (stcb);
2046 }
2047
2048
2049 /*
2050  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2051  * find all addresses that the sender has specified in any address list. Each
2052  * address will be used to lookup the TCB and see if one exits.
2053  */
2054 static struct sctp_tcb *
2055 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2056     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2057     struct sockaddr *dst)
2058 {
2059         struct sctp_paramhdr *phdr, parm_buf;
2060
2061 #if defined(INET) || defined(INET6)
2062         struct sctp_tcb *stcb;
2063         uint16_t ptype;
2064
2065 #endif
2066         uint16_t plen;
2067
2068 #ifdef INET
2069         struct sockaddr_in sin4;
2070
2071 #endif
2072 #ifdef INET6
2073         struct sockaddr_in6 sin6;
2074
2075 #endif
2076
2077 #ifdef INET
2078         memset(&sin4, 0, sizeof(sin4));
2079         sin4.sin_len = sizeof(sin4);
2080         sin4.sin_family = AF_INET;
2081         sin4.sin_port = sh->src_port;
2082 #endif
2083 #ifdef INET6
2084         memset(&sin6, 0, sizeof(sin6));
2085         sin6.sin6_len = sizeof(sin6);
2086         sin6.sin6_family = AF_INET6;
2087         sin6.sin6_port = sh->src_port;
2088 #endif
2089
2090         offset += sizeof(struct sctp_init_chunk);
2091
2092         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2093         while (phdr != NULL) {
2094                 /* now we must see if we want the parameter */
2095 #if defined(INET) || defined(INET6)
2096                 ptype = ntohs(phdr->param_type);
2097 #endif
2098                 plen = ntohs(phdr->param_length);
2099                 if (plen == 0) {
2100                         break;
2101                 }
2102 #ifdef INET
2103                 if (ptype == SCTP_IPV4_ADDRESS &&
2104                     plen == sizeof(struct sctp_ipv4addr_param)) {
2105                         /* Get the rest of the address */
2106                         struct sctp_ipv4addr_param ip4_parm, *p4;
2107
2108                         phdr = sctp_get_next_param(m, offset,
2109                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2110                         if (phdr == NULL) {
2111                                 return (NULL);
2112                         }
2113                         p4 = (struct sctp_ipv4addr_param *)phdr;
2114                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2115                         /* look it up */
2116                         stcb = sctp_findassociation_ep_addr(inp_p,
2117                             (struct sockaddr *)&sin4, netp, dst, NULL);
2118                         if (stcb != NULL) {
2119                                 return (stcb);
2120                         }
2121                 }
2122 #endif
2123 #ifdef INET6
2124                 if (ptype == SCTP_IPV6_ADDRESS &&
2125                     plen == sizeof(struct sctp_ipv6addr_param)) {
2126                         /* Get the rest of the address */
2127                         struct sctp_ipv6addr_param ip6_parm, *p6;
2128
2129                         phdr = sctp_get_next_param(m, offset,
2130                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2131                         if (phdr == NULL) {
2132                                 return (NULL);
2133                         }
2134                         p6 = (struct sctp_ipv6addr_param *)phdr;
2135                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2136                         /* look it up */
2137                         stcb = sctp_findassociation_ep_addr(inp_p,
2138                             (struct sockaddr *)&sin6, netp, dst, NULL);
2139                         if (stcb != NULL) {
2140                                 return (stcb);
2141                         }
2142                 }
2143 #endif
2144                 offset += SCTP_SIZE32(plen);
2145                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2146                     sizeof(parm_buf));
2147         }
2148         return (NULL);
2149 }
2150
2151 static struct sctp_tcb *
2152 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2153     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2154     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2155 {
2156         /*
2157          * Use my vtag to hash. If we find it we then verify the source addr
2158          * is in the assoc. If all goes well we save a bit on rec of a
2159          * packet.
2160          */
2161         struct sctpasochead *head;
2162         struct sctp_nets *net;
2163         struct sctp_tcb *stcb;
2164
2165         SCTP_INP_INFO_RLOCK();
2166         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2167             SCTP_BASE_INFO(hashasocmark))];
2168         LIST_FOREACH(stcb, head, sctp_asocs) {
2169                 SCTP_INP_RLOCK(stcb->sctp_ep);
2170                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2171                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2172                         continue;
2173                 }
2174                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2175                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2176                         continue;
2177                 }
2178                 SCTP_TCB_LOCK(stcb);
2179                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2180                 if (stcb->asoc.my_vtag == vtag) {
2181                         /* candidate */
2182                         if (stcb->rport != rport) {
2183                                 SCTP_TCB_UNLOCK(stcb);
2184                                 continue;
2185                         }
2186                         if (stcb->sctp_ep->sctp_lport != lport) {
2187                                 SCTP_TCB_UNLOCK(stcb);
2188                                 continue;
2189                         }
2190                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2191                                 SCTP_TCB_UNLOCK(stcb);
2192                                 continue;
2193                         }
2194                         /* RRS:Need toaddr check here */
2195                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2196                                 /* Endpoint does not own this address */
2197                                 SCTP_TCB_UNLOCK(stcb);
2198                                 continue;
2199                         }
2200                         if (remote_tag) {
2201                                 /*
2202                                  * If we have both vtags that's all we match
2203                                  * on
2204                                  */
2205                                 if (stcb->asoc.peer_vtag == remote_tag) {
2206                                         /*
2207                                          * If both tags match we consider it
2208                                          * conclusive and check NO
2209                                          * source/destination addresses
2210                                          */
2211                                         goto conclusive;
2212                                 }
2213                         }
2214                         if (skip_src_check) {
2215                 conclusive:
2216                                 if (from) {
2217                                         *netp = sctp_findnet(stcb, from);
2218                                 } else {
2219                                         *netp = NULL;   /* unknown */
2220                                 }
2221                                 if (inp_p)
2222                                         *inp_p = stcb->sctp_ep;
2223                                 SCTP_INP_INFO_RUNLOCK();
2224                                 return (stcb);
2225                         }
2226                         net = sctp_findnet(stcb, from);
2227                         if (net) {
2228                                 /* yep its him. */
2229                                 *netp = net;
2230                                 SCTP_STAT_INCR(sctps_vtagexpress);
2231                                 *inp_p = stcb->sctp_ep;
2232                                 SCTP_INP_INFO_RUNLOCK();
2233                                 return (stcb);
2234                         } else {
2235                                 /*
2236                                  * not him, this should only happen in rare
2237                                  * cases so I peg it.
2238                                  */
2239                                 SCTP_STAT_INCR(sctps_vtagbogus);
2240                         }
2241                 }
2242                 SCTP_TCB_UNLOCK(stcb);
2243         }
2244         SCTP_INP_INFO_RUNLOCK();
2245         return (NULL);
2246 }
2247
2248
2249 /*
2250  * Find an association with the pointer to the inbound IP packet. This can be
2251  * a IPv4 or IPv6 packet.
2252  */
2253 struct sctp_tcb *
2254 sctp_findassociation_addr(struct mbuf *m, int offset,
2255     struct sockaddr *src, struct sockaddr *dst,
2256     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2257     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2258 {
2259         struct sctp_tcb *stcb;
2260         struct sctp_inpcb *inp;
2261
2262         if (sh->v_tag) {
2263                 /* we only go down this path if vtag is non-zero */
2264                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2265                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2266                 if (stcb) {
2267                         return (stcb);
2268                 }
2269         }
2270         if (inp_p) {
2271                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2272                     1, vrf_id);
2273                 inp = *inp_p;
2274         } else {
2275                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2276                     1, vrf_id);
2277         }
2278         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2279         if (stcb == NULL && inp) {
2280                 /* Found a EP but not this address */
2281                 if ((ch->chunk_type == SCTP_INITIATION) ||
2282                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2283                         /*-
2284                          * special hook, we do NOT return linp or an
2285                          * association that is linked to an existing
2286                          * association that is under the TCP pool (i.e. no
2287                          * listener exists). The endpoint finding routine
2288                          * will always find a listener before examining the
2289                          * TCP pool.
2290                          */
2291                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2292                                 if (inp_p) {
2293                                         *inp_p = NULL;
2294                                 }
2295                                 return (NULL);
2296                         }
2297                         stcb = sctp_findassociation_special_addr(m,
2298                             offset, sh, &inp, netp, dst);
2299                         if (inp_p != NULL) {
2300                                 *inp_p = inp;
2301                         }
2302                 }
2303         }
2304         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2305         return (stcb);
2306 }
2307
2308 /*
2309  * lookup an association by an ASCONF lookup address.
2310  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2311  */
2312 struct sctp_tcb *
2313 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2314     struct sockaddr *dst, struct sctphdr *sh,
2315     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2316 {
2317         struct sctp_tcb *stcb;
2318         union sctp_sockstore remote_store;
2319         struct sctp_paramhdr parm_buf, *phdr;
2320         int ptype;
2321         int zero_address = 0;
2322
2323 #ifdef INET
2324         struct sockaddr_in *sin;
2325
2326 #endif
2327 #ifdef INET6
2328         struct sockaddr_in6 *sin6;
2329
2330 #endif
2331
2332         memset(&remote_store, 0, sizeof(remote_store));
2333         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2334             &parm_buf, sizeof(struct sctp_paramhdr));
2335         if (phdr == NULL) {
2336                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2337                     __func__);
2338                 return NULL;
2339         }
2340         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2341         /* get the correlation address */
2342         switch (ptype) {
2343 #ifdef INET6
2344         case SCTP_IPV6_ADDRESS:
2345                 {
2346                         /* ipv6 address param */
2347                         struct sctp_ipv6addr_param *p6, p6_buf;
2348
2349                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2350                                 return NULL;
2351                         }
2352                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2353                             offset + sizeof(struct sctp_asconf_chunk),
2354                             &p6_buf.ph, sizeof(*p6));
2355                         if (p6 == NULL) {
2356                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2357                                     __func__);
2358                                 return (NULL);
2359                         }
2360                         sin6 = &remote_store.sin6;
2361                         sin6->sin6_family = AF_INET6;
2362                         sin6->sin6_len = sizeof(*sin6);
2363                         sin6->sin6_port = sh->src_port;
2364                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2365                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2366                                 zero_address = 1;
2367                         break;
2368                 }
2369 #endif
2370 #ifdef INET
2371         case SCTP_IPV4_ADDRESS:
2372                 {
2373                         /* ipv4 address param */
2374                         struct sctp_ipv4addr_param *p4, p4_buf;
2375
2376                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2377                                 return NULL;
2378                         }
2379                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2380                             offset + sizeof(struct sctp_asconf_chunk),
2381                             &p4_buf.ph, sizeof(*p4));
2382                         if (p4 == NULL) {
2383                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2384                                     __func__);
2385                                 return (NULL);
2386                         }
2387                         sin = &remote_store.sin;
2388                         sin->sin_family = AF_INET;
2389                         sin->sin_len = sizeof(*sin);
2390                         sin->sin_port = sh->src_port;
2391                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2392                         if (sin->sin_addr.s_addr == INADDR_ANY)
2393                                 zero_address = 1;
2394                         break;
2395                 }
2396 #endif
2397         default:
2398                 /* invalid address param type */
2399                 return NULL;
2400         }
2401
2402         if (zero_address) {
2403                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2404                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2405                 if (stcb != NULL) {
2406                         SCTP_INP_DECR_REF(*inp_p);
2407                 }
2408         } else {
2409                 stcb = sctp_findassociation_ep_addr(inp_p,
2410                     &remote_store.sa, netp,
2411                     dst, NULL);
2412         }
2413         return (stcb);
2414 }
2415
2416
2417 /*
2418  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2419  * addresses. This way if we don't get a bind we by default pick a ephemeral
2420  * port with all addresses bound.
2421  */
2422 int
2423 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2424 {
2425         /*
2426          * we get called when a new endpoint starts up. We need to allocate
2427          * the sctp_inpcb structure from the zone and init it. Mark it as
2428          * unbound and find a port that we can use as an ephemeral with
2429          * INADDR_ANY. If the user binds later no problem we can then add in
2430          * the specific addresses. And setup the default parameters for the
2431          * EP.
2432          */
2433         int i, error;
2434         struct sctp_inpcb *inp;
2435         struct sctp_pcb *m;
2436         struct timeval time;
2437         sctp_sharedkey_t *null_key;
2438
2439         error = 0;
2440
2441         SCTP_INP_INFO_WLOCK();
2442         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2443         if (inp == NULL) {
2444                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2445                 SCTP_INP_INFO_WUNLOCK();
2446                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2447                 return (ENOBUFS);
2448         }
2449         /* zap it */
2450         bzero(inp, sizeof(*inp));
2451
2452         /* bump generations */
2453         /* setup socket pointers */
2454         inp->sctp_socket = so;
2455         inp->ip_inp.inp.inp_socket = so;
2456         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2457 #ifdef INET6
2458         if (INP_SOCKAF(so) == AF_INET6) {
2459                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2460                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2461                 }
2462                 if (MODULE_GLOBAL(ip6_v6only)) {
2463                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2464                 }
2465         }
2466 #endif
2467         inp->sctp_associd_counter = 1;
2468         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2469         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2470         inp->max_cwnd = 0;
2471         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2472         inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
2473         inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
2474         inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable);
2475         inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable);
2476         inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2477         inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2478         inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2479         inp->idata_supported = 0;
2480
2481         inp->fibnum = so->so_fibnum;
2482         /* init the small hash table we use to track asocid <-> tcb */
2483         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2484         if (inp->sctp_asocidhash == NULL) {
2485                 crfree(inp->ip_inp.inp.inp_cred);
2486                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2487                 SCTP_INP_INFO_WUNLOCK();
2488                 return (ENOBUFS);
2489         }
2490 #ifdef IPSEC
2491         error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp);
2492         if (error != 0) {
2493                 crfree(inp->ip_inp.inp.inp_cred);
2494                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2495                 SCTP_INP_INFO_WUNLOCK();
2496                 return error;
2497         }
2498 #endif                          /* IPSEC */
2499         SCTP_INCR_EP_COUNT();
2500         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2501         SCTP_INP_INFO_WUNLOCK();
2502
2503         so->so_pcb = (caddr_t)inp;
2504
2505         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2506                 /* UDP style socket */
2507                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2508                     SCTP_PCB_FLAGS_UNBOUND);
2509                 /* Be sure it is NON-BLOCKING IO for UDP */
2510                 /* SCTP_SET_SO_NBIO(so); */
2511         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2512                 /* TCP style socket */
2513                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2514                     SCTP_PCB_FLAGS_UNBOUND);
2515                 /* Be sure we have blocking IO by default */
2516                 SCTP_CLEAR_SO_NBIO(so);
2517         } else {
2518                 /*
2519                  * unsupported socket type (RAW, etc)- in case we missed it
2520                  * in protosw
2521                  */
2522                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2523                 so->so_pcb = NULL;
2524                 crfree(inp->ip_inp.inp.inp_cred);
2525 #ifdef IPSEC
2526                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2527 #endif
2528                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2529                 return (EOPNOTSUPP);
2530         }
2531         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2532                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2533                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2534         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2535                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2536                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2537         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2538                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2539                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2540         }
2541         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2542             &inp->sctp_hashmark);
2543         if (inp->sctp_tcbhash == NULL) {
2544                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2545                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2546                 so->so_pcb = NULL;
2547                 crfree(inp->ip_inp.inp.inp_cred);
2548 #ifdef IPSEC
2549                 ipsec_delete_pcbpolicy(&inp->ip_inp.inp);
2550 #endif
2551                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2552                 return (ENOBUFS);
2553         }
2554         inp->def_vrf_id = vrf_id;
2555
2556         SCTP_INP_INFO_WLOCK();
2557         SCTP_INP_LOCK_INIT(inp);
2558         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2559         SCTP_INP_READ_INIT(inp);
2560         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2561         /* lock the new ep */
2562         SCTP_INP_WLOCK(inp);
2563
2564         /* add it to the info area */
2565         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2566         SCTP_INP_INFO_WUNLOCK();
2567
2568         TAILQ_INIT(&inp->read_queue);
2569         LIST_INIT(&inp->sctp_addr_list);
2570
2571         LIST_INIT(&inp->sctp_asoc_list);
2572
2573 #ifdef SCTP_TRACK_FREED_ASOCS
2574         /* TEMP CODE */
2575         LIST_INIT(&inp->sctp_asoc_free_list);
2576 #endif
2577         /* Init the timer structure for signature change */
2578         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2579         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2580
2581         /* now init the actual endpoint default data */
2582         m = &inp->sctp_ep;
2583
2584         /* setup the base timeout information */
2585         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2586         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2587         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2588         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2589         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2590         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2591         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2592         /* all max/min max are in ms */
2593         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2594         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2595         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2596         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2597         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2598         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2599         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2600         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2601         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2602         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2603         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2604         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2605         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2606
2607         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2608         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2609         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2610         /* number of streams to pre-open on a association */
2611         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2612
2613         /* Add adaptation cookie */
2614         m->adaptation_layer_indicator = 0;
2615         m->adaptation_layer_indicator_provided = 0;
2616
2617         /* seed random number generator */
2618         m->random_counter = 1;
2619         m->store_at = SCTP_SIGNATURE_SIZE;
2620         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2621         sctp_fill_random_store(m);
2622
2623         /* Minimum cookie size */
2624         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2625             sizeof(struct sctp_state_cookie);
2626         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2627
2628         /* Setup the initial secret */
2629         (void)SCTP_GETTIME_TIMEVAL(&time);
2630         m->time_of_secret_change = time.tv_sec;
2631
2632         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2633                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2634         }
2635         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2636
2637         /* How long is a cookie good for ? */
2638         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2639         /*
2640          * Initialize authentication parameters
2641          */
2642         m->local_hmacs = sctp_default_supported_hmaclist();
2643         m->local_auth_chunks = sctp_alloc_chunklist();
2644         if (inp->asconf_supported) {
2645                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2646                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2647         }
2648         m->default_dscp = 0;
2649 #ifdef INET6
2650         m->default_flowlabel = 0;
2651 #endif
2652         m->port = 0;            /* encapsulation disabled by default */
2653         LIST_INIT(&m->shared_keys);
2654         /* add default NULL key as key id 0 */
2655         null_key = sctp_alloc_sharedkey();
2656         sctp_insert_sharedkey(&m->shared_keys, null_key);
2657         SCTP_INP_WUNLOCK(inp);
2658 #ifdef SCTP_LOG_CLOSING
2659         sctp_log_closing(inp, NULL, 12);
2660 #endif
2661         return (error);
2662 }
2663
2664
2665 void
2666 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2667     struct sctp_tcb *stcb)
2668 {
2669         struct sctp_nets *net;
2670         uint16_t lport, rport;
2671         struct sctppcbhead *head;
2672         struct sctp_laddr *laddr, *oladdr;
2673
2674         atomic_add_int(&stcb->asoc.refcnt, 1);
2675         SCTP_TCB_UNLOCK(stcb);
2676         SCTP_INP_INFO_WLOCK();
2677         SCTP_INP_WLOCK(old_inp);
2678         SCTP_INP_WLOCK(new_inp);
2679         SCTP_TCB_LOCK(stcb);
2680         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2681
2682         new_inp->sctp_ep.time_of_secret_change =
2683             old_inp->sctp_ep.time_of_secret_change;
2684         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2685             sizeof(old_inp->sctp_ep.secret_key));
2686         new_inp->sctp_ep.current_secret_number =
2687             old_inp->sctp_ep.current_secret_number;
2688         new_inp->sctp_ep.last_secret_number =
2689             old_inp->sctp_ep.last_secret_number;
2690         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2691
2692         /* make it so new data pours into the new socket */
2693         stcb->sctp_socket = new_inp->sctp_socket;
2694         stcb->sctp_ep = new_inp;
2695
2696         /* Copy the port across */
2697         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2698         rport = stcb->rport;
2699         /* Pull the tcb from the old association */
2700         LIST_REMOVE(stcb, sctp_tcbhash);
2701         LIST_REMOVE(stcb, sctp_tcblist);
2702         if (stcb->asoc.in_asocid_hash) {
2703                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2704         }
2705         /* Now insert the new_inp into the TCP connected hash */
2706         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2707
2708         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2709         /* Its safe to access */
2710         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2711
2712         /* Now move the tcb into the endpoint list */
2713         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2714         /*
2715          * Question, do we even need to worry about the ep-hash since we
2716          * only have one connection? Probably not :> so lets get rid of it
2717          * and not suck up any kernel memory in that.
2718          */
2719         if (stcb->asoc.in_asocid_hash) {
2720                 struct sctpasochead *lhd;
2721
2722                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2723                     new_inp->hashasocidmark)];
2724                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2725         }
2726         /* Ok. Let's restart timer. */
2727         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2728                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2729                     stcb, net);
2730         }
2731
2732         SCTP_INP_INFO_WUNLOCK();
2733         if (new_inp->sctp_tcbhash != NULL) {
2734                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2735                 new_inp->sctp_tcbhash = NULL;
2736         }
2737         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2738                 /* Subset bound, so copy in the laddr list from the old_inp */
2739                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2740                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2741                         if (laddr == NULL) {
2742                                 /*
2743                                  * Gak, what can we do? This assoc is really
2744                                  * HOSED. We probably should send an abort
2745                                  * here.
2746                                  */
2747                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2748                                 continue;
2749                         }
2750                         SCTP_INCR_LADDR_COUNT();
2751                         bzero(laddr, sizeof(*laddr));
2752                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2753                         laddr->ifa = oladdr->ifa;
2754                         atomic_add_int(&laddr->ifa->refcount, 1);
2755                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2756                             sctp_nxt_addr);
2757                         new_inp->laddr_count++;
2758                         if (oladdr == stcb->asoc.last_used_address) {
2759                                 stcb->asoc.last_used_address = laddr;
2760                         }
2761                 }
2762         }
2763         /*
2764          * Now any running timers need to be adjusted since we really don't
2765          * care if they are running or not just blast in the new_inp into
2766          * all of them.
2767          */
2768
2769         stcb->asoc.dack_timer.ep = (void *)new_inp;
2770         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2771         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2772         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2773         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2774         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2775         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2776         /* now what about the nets? */
2777         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2778                 net->pmtu_timer.ep = (void *)new_inp;
2779                 net->hb_timer.ep = (void *)new_inp;
2780                 net->rxt_timer.ep = (void *)new_inp;
2781         }
2782         SCTP_INP_WUNLOCK(new_inp);
2783         SCTP_INP_WUNLOCK(old_inp);
2784 }
2785
2786 /*
2787  * insert an laddr entry with the given ifa for the desired list
2788  */
2789 static int
2790 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
2791 {
2792         struct sctp_laddr *laddr;
2793
2794         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2795         if (laddr == NULL) {
2796                 /* out of memory? */
2797                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2798                 return (EINVAL);
2799         }
2800         SCTP_INCR_LADDR_COUNT();
2801         bzero(laddr, sizeof(*laddr));
2802         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2803         laddr->ifa = ifa;
2804         laddr->action = act;
2805         atomic_add_int(&ifa->refcount, 1);
2806         /* insert it */
2807         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
2808
2809         return (0);
2810 }
2811
2812 /*
2813  * Remove an laddr entry from the local address list (on an assoc)
2814  */
2815 static void
2816 sctp_remove_laddr(struct sctp_laddr *laddr)
2817 {
2818
2819         /* remove from the list */
2820         LIST_REMOVE(laddr, sctp_nxt_addr);
2821         sctp_free_ifa(laddr->ifa);
2822         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
2823         SCTP_DECR_LADDR_COUNT();
2824 }
2825
2826
2827
2828 /* sctp_ifap is used to bypass normal local address validation checks */
2829 int
2830 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2831     struct sctp_ifa *sctp_ifap, struct thread *p)
2832 {
2833         /* bind a ep to a socket address */
2834         struct sctppcbhead *head;
2835         struct sctp_inpcb *inp, *inp_tmp;
2836         struct inpcb *ip_inp;
2837         int port_reuse_active = 0;
2838         int bindall;
2839         uint16_t lport;
2840         int error;
2841         uint32_t vrf_id;
2842
2843         lport = 0;
2844         bindall = 1;
2845         inp = (struct sctp_inpcb *)so->so_pcb;
2846         ip_inp = (struct inpcb *)so->so_pcb;
2847 #ifdef SCTP_DEBUG
2848         if (addr) {
2849                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2850                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2851                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2852                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2853         }
2854 #endif
2855         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2856                 /* already did a bind, subsequent binds NOT allowed ! */
2857                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2858                 return (EINVAL);
2859         }
2860 #ifdef INVARIANTS
2861         if (p == NULL)
2862                 panic("null proc/thread");
2863 #endif
2864         if (addr != NULL) {
2865                 switch (addr->sa_family) {
2866 #ifdef INET
2867                 case AF_INET:
2868                         {
2869                                 struct sockaddr_in *sin;
2870
2871                                 /* IPV6_V6ONLY socket? */
2872                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2873                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2874                                         return (EINVAL);
2875                                 }
2876                                 if (addr->sa_len != sizeof(*sin)) {
2877                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2878                                         return (EINVAL);
2879                                 }
2880                                 sin = (struct sockaddr_in *)addr;
2881                                 lport = sin->sin_port;
2882                                 /*
2883                                  * For LOOPBACK the prison_local_ip4() call
2884                                  * will transmute the ip address to the
2885                                  * proper value.
2886                                  */
2887                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2888                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2889                                         return (error);
2890                                 }
2891                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2892                                         bindall = 0;
2893                                 }
2894                                 break;
2895                         }
2896 #endif
2897 #ifdef INET6
2898                 case AF_INET6:
2899                         {
2900                                 /*
2901                                  * Only for pure IPv6 Address. (No IPv4
2902                                  * Mapped!)
2903                                  */
2904                                 struct sockaddr_in6 *sin6;
2905
2906                                 sin6 = (struct sockaddr_in6 *)addr;
2907
2908                                 if (addr->sa_len != sizeof(*sin6)) {
2909                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2910                                         return (EINVAL);
2911                                 }
2912                                 lport = sin6->sin6_port;
2913                                 /*
2914                                  * For LOOPBACK the prison_local_ip6() call
2915                                  * will transmute the ipv6 address to the
2916                                  * proper value.
2917                                  */
2918                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2919                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2920                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2921                                         return (error);
2922                                 }
2923                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2924                                         bindall = 0;
2925                                         /* KAME hack: embed scopeid */
2926                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2927                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2928                                                 return (EINVAL);
2929                                         }
2930                                 }
2931                                 /* this must be cleared for ifa_ifwithaddr() */
2932                                 sin6->sin6_scope_id = 0;
2933                                 break;
2934                         }
2935 #endif
2936                 default:
2937                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2938                         return (EAFNOSUPPORT);
2939                 }
2940         }
2941         SCTP_INP_INFO_WLOCK();
2942         SCTP_INP_WLOCK(inp);
2943         /* Setup a vrf_id to be the default for the non-bind-all case. */
2944         vrf_id = inp->def_vrf_id;
2945
2946         /* increase our count due to the unlock we do */
2947         SCTP_INP_INCR_REF(inp);
2948         if (lport) {
2949                 /*
2950                  * Did the caller specify a port? if so we must see if an ep
2951                  * already has this one bound.
2952                  */
2953                 /* got to be root to get at low ports */
2954                 if (ntohs(lport) < IPPORT_RESERVED) {
2955                         if (p && (error =
2956                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2957                             )) {
2958                                 SCTP_INP_DECR_REF(inp);
2959                                 SCTP_INP_WUNLOCK(inp);
2960                                 SCTP_INP_INFO_WUNLOCK();
2961                                 return (error);
2962                         }
2963                 }
2964                 SCTP_INP_WUNLOCK(inp);
2965                 if (bindall) {
2966                         vrf_id = inp->def_vrf_id;
2967                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2968                         if (inp_tmp != NULL) {
2969                                 /*
2970                                  * lock guy returned and lower count note
2971                                  * that we are not bound so inp_tmp should
2972                                  * NEVER be inp. And it is this inp
2973                                  * (inp_tmp) that gets the reference bump,
2974                                  * so we must lower it.
2975                                  */
2976                                 SCTP_INP_DECR_REF(inp_tmp);
2977                                 /* unlock info */
2978                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2979                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2980                                         /*
2981                                          * Ok, must be one-2-one and
2982                                          * allowing port re-use
2983                                          */
2984                                         port_reuse_active = 1;
2985                                         goto continue_anyway;
2986                                 }
2987                                 SCTP_INP_DECR_REF(inp);
2988                                 SCTP_INP_INFO_WUNLOCK();
2989                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2990                                 return (EADDRINUSE);
2991                         }
2992                 } else {
2993                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2994                         if (inp_tmp != NULL) {
2995                                 /*
2996                                  * lock guy returned and lower count note
2997                                  * that we are not bound so inp_tmp should
2998                                  * NEVER be inp. And it is this inp
2999                                  * (inp_tmp) that gets the reference bump,
3000                                  * so we must lower it.
3001                                  */
3002                                 SCTP_INP_DECR_REF(inp_tmp);
3003                                 /* unlock info */
3004                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3005                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3006                                         /*
3007                                          * Ok, must be one-2-one and
3008                                          * allowing port re-use
3009                                          */
3010                                         port_reuse_active = 1;
3011                                         goto continue_anyway;
3012                                 }
3013                                 SCTP_INP_DECR_REF(inp);
3014                                 SCTP_INP_INFO_WUNLOCK();
3015                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3016                                 return (EADDRINUSE);
3017                         }
3018                 }
3019 continue_anyway:
3020                 SCTP_INP_WLOCK(inp);
3021                 if (bindall) {
3022                         /* verify that no lport is not used by a singleton */
3023                         if ((port_reuse_active == 0) &&
3024                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
3025                                 /* Sorry someone already has this one bound */
3026                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
3027                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
3028                                         port_reuse_active = 1;
3029                                 } else {
3030                                         SCTP_INP_DECR_REF(inp);
3031                                         SCTP_INP_WUNLOCK(inp);
3032                                         SCTP_INP_INFO_WUNLOCK();
3033                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3034                                         return (EADDRINUSE);
3035                                 }
3036                         }
3037                 }
3038         } else {
3039                 uint16_t first, last, candidate;
3040                 uint16_t count;
3041                 int done;
3042
3043                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3044                         first = MODULE_GLOBAL(ipport_hifirstauto);
3045                         last = MODULE_GLOBAL(ipport_hilastauto);
3046                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3047                         if (p && (error =
3048                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3049                             )) {
3050                                 SCTP_INP_DECR_REF(inp);
3051                                 SCTP_INP_WUNLOCK(inp);
3052                                 SCTP_INP_INFO_WUNLOCK();
3053                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3054                                 return (error);
3055                         }
3056                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3057                         last = MODULE_GLOBAL(ipport_lowlastauto);
3058                 } else {
3059                         first = MODULE_GLOBAL(ipport_firstauto);
3060                         last = MODULE_GLOBAL(ipport_lastauto);
3061                 }
3062                 if (first > last) {
3063                         uint16_t temp;
3064
3065                         temp = first;
3066                         first = last;
3067                         last = temp;
3068                 }
3069                 count = last - first + 1;       /* number of candidates */
3070                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3071
3072                 done = 0;
3073                 while (!done) {
3074                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3075                                 done = 1;
3076                         }
3077                         if (!done) {
3078                                 if (--count == 0) {
3079                                         SCTP_INP_DECR_REF(inp);
3080                                         SCTP_INP_WUNLOCK(inp);
3081                                         SCTP_INP_INFO_WUNLOCK();
3082                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3083                                         return (EADDRINUSE);
3084                                 }
3085                                 if (candidate == last)
3086                                         candidate = first;
3087                                 else
3088                                         candidate = candidate + 1;
3089                         }
3090                 }
3091                 lport = htons(candidate);
3092         }
3093         SCTP_INP_DECR_REF(inp);
3094         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3095             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3096                 /*
3097                  * this really should not happen. The guy did a non-blocking
3098                  * bind and then did a close at the same time.
3099                  */
3100                 SCTP_INP_WUNLOCK(inp);
3101                 SCTP_INP_INFO_WUNLOCK();
3102                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3103                 return (EINVAL);
3104         }
3105         /* ok we look clear to give out this port, so lets setup the binding */
3106         if (bindall) {
3107                 /* binding to all addresses, so just set in the proper flags */
3108                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3109                 /* set the automatic addr changes from kernel flag */
3110                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3111                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3112                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3113                 } else {
3114                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3115                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3116                 }
3117                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3118                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3119                 } else {
3120                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3121                 }
3122                 /*
3123                  * set the automatic mobility_base from kernel flag (by
3124                  * micchie)
3125                  */
3126                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3127                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3128                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3129                 } else {
3130                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3131                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3132                 }
3133                 /*
3134                  * set the automatic mobility_fasthandoff from kernel flag
3135                  * (by micchie)
3136                  */
3137                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3138                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3139                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3140                 } else {
3141                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3142                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3143                 }
3144         } else {
3145                 /*
3146                  * bind specific, make sure flags is off and add a new
3147                  * address structure to the sctp_addr_list inside the ep
3148                  * structure.
3149                  *
3150                  * We will need to allocate one and insert it at the head. The
3151                  * socketopt call can just insert new addresses in there as
3152                  * well. It will also have to do the embed scope kame hack
3153                  * too (before adding).
3154                  */
3155                 struct sctp_ifa *ifa;
3156                 union sctp_sockstore store;
3157
3158                 memset(&store, 0, sizeof(store));
3159                 switch (addr->sa_family) {
3160 #ifdef INET
3161                 case AF_INET:
3162                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3163                         store.sin.sin_port = 0;
3164                         break;
3165 #endif
3166 #ifdef INET6
3167                 case AF_INET6:
3168                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3169                         store.sin6.sin6_port = 0;
3170                         break;
3171 #endif
3172                 default:
3173                         break;
3174                 }
3175                 /*
3176                  * first find the interface with the bound address need to
3177                  * zero out the port to find the address! yuck! can't do
3178                  * this earlier since need port for sctp_pcb_findep()
3179                  */
3180                 if (sctp_ifap != NULL) {
3181                         ifa = sctp_ifap;
3182                 } else {
3183                         /*
3184                          * Note for BSD we hit here always other O/S's will
3185                          * pass things in via the sctp_ifap argument
3186                          * (Panda).
3187                          */
3188                         ifa = sctp_find_ifa_by_addr(&store.sa,
3189                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3190                 }
3191                 if (ifa == NULL) {
3192                         /* Can't find an interface with that address */
3193                         SCTP_INP_WUNLOCK(inp);
3194                         SCTP_INP_INFO_WUNLOCK();
3195                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3196                         return (EADDRNOTAVAIL);
3197                 }
3198 #ifdef INET6
3199                 if (addr->sa_family == AF_INET6) {
3200                         /* GAK, more FIXME IFA lock? */
3201                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3202                                 /* Can't bind a non-existent addr. */
3203                                 SCTP_INP_WUNLOCK(inp);
3204                                 SCTP_INP_INFO_WUNLOCK();
3205                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3206                                 return (EINVAL);
3207                         }
3208                 }
3209 #endif
3210                 /* we're not bound all */
3211                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3212                 /* allow bindx() to send ASCONF's for binding changes */
3213                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3214                 /* clear automatic addr changes from kernel flag */
3215                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3216
3217                 /* add this address to the endpoint list */
3218                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3219                 if (error != 0) {
3220                         SCTP_INP_WUNLOCK(inp);
3221                         SCTP_INP_INFO_WUNLOCK();
3222                         return (error);
3223                 }
3224                 inp->laddr_count++;
3225         }
3226         /* find the bucket */
3227         if (port_reuse_active) {
3228                 /* Put it into tcp 1-2-1 hash */
3229                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3230                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3231         } else {
3232                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3233         }
3234         /* put it in the bucket */
3235         LIST_INSERT_HEAD(head, inp, sctp_hash);
3236         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3237             (void *)head, ntohs(lport), port_reuse_active);
3238         /* set in the port */
3239         inp->sctp_lport = lport;
3240
3241         /* turn off just the unbound flag */
3242         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3243         SCTP_INP_WUNLOCK(inp);
3244         SCTP_INP_INFO_WUNLOCK();
3245         return (0);
3246 }
3247
3248
3249 static void
3250 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3251 {
3252         struct sctp_iterator *it, *nit;
3253
3254         /*
3255          * We enter with the only the ITERATOR_LOCK in place and a write
3256          * lock on the inp_info stuff.
3257          */
3258         it = sctp_it_ctl.cur_it;
3259         if (it && (it->vn != curvnet)) {
3260                 /* Its not looking at our VNET */
3261                 return;
3262         }
3263         if (it && (it->inp == inp)) {
3264                 /*
3265                  * This is tricky and we hold the iterator lock, but when it
3266                  * returns and gets the lock (when we release it) the
3267                  * iterator will try to operate on inp. We need to stop that
3268                  * from happening. But of course the iterator has a
3269                  * reference on the stcb and inp. We can mark it and it will
3270                  * stop.
3271                  *
3272                  * If its a single iterator situation, we set the end iterator
3273                  * flag. Otherwise we set the iterator to go to the next
3274                  * inp.
3275                  *
3276                  */
3277                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3278                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3279                 } else {
3280                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3281                 }
3282         }
3283         /*
3284          * Now go through and remove any single reference to our inp that
3285          * may be still pending on the list
3286          */
3287         SCTP_IPI_ITERATOR_WQ_LOCK();
3288         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3289                 if (it->vn != curvnet) {
3290                         continue;
3291                 }
3292                 if (it->inp == inp) {
3293                         /* This one points to me is it inp specific? */
3294                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3295                                 /* Remove and free this one */
3296                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3297                                     it, sctp_nxt_itr);
3298                                 if (it->function_atend != NULL) {
3299                                         (*it->function_atend) (it->pointer, it->val);
3300                                 }
3301                                 SCTP_FREE(it, SCTP_M_ITER);
3302                         } else {
3303                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3304                                 if (it->inp) {
3305                                         SCTP_INP_INCR_REF(it->inp);
3306                                 }
3307                         }
3308                         /*
3309                          * When its put in the refcnt is incremented so decr
3310                          * it
3311                          */
3312                         SCTP_INP_DECR_REF(inp);
3313                 }
3314         }
3315         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3316 }
3317
3318 /* release sctp_inpcb unbind the port */
3319 void
3320 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3321 {
3322         /*
3323          * Here we free a endpoint. We must find it (if it is in the Hash
3324          * table) and remove it from there. Then we must also find it in the
3325          * overall list and remove it from there. After all removals are
3326          * complete then any timer has to be stopped. Then start the actual
3327          * freeing. a) Any local lists. b) Any associations. c) The hash of
3328          * all associations. d) finally the ep itself.
3329          */
3330         struct sctp_tcb *asoc, *nasoc;
3331         struct sctp_laddr *laddr, *nladdr;
3332         struct inpcb *ip_pcb;
3333         struct socket *so;
3334         int being_refed = 0;
3335         struct sctp_queued_to_read *sq, *nsq;
3336         int cnt;
3337         sctp_sharedkey_t *shared_key, *nshared_key;
3338
3339
3340 #ifdef SCTP_LOG_CLOSING
3341         sctp_log_closing(inp, NULL, 0);
3342 #endif
3343         SCTP_ITERATOR_LOCK();
3344         /* mark any iterators on the list or being processed */
3345         sctp_iterator_inp_being_freed(inp);
3346         SCTP_ITERATOR_UNLOCK();
3347         so = inp->sctp_socket;
3348         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3349                 /* been here before.. eeks.. get out of here */
3350                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3351 #ifdef SCTP_LOG_CLOSING
3352                 sctp_log_closing(inp, NULL, 1);
3353 #endif
3354                 return;
3355         }
3356         SCTP_ASOC_CREATE_LOCK(inp);
3357         SCTP_INP_INFO_WLOCK();
3358
3359         SCTP_INP_WLOCK(inp);
3360         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3361                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3362                 /* socket is gone, so no more wakeups allowed */
3363                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3364                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3365                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3366
3367         }
3368         /* First time through we have the socket lock, after that no more. */
3369         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3370             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3371
3372         if (inp->control) {
3373                 sctp_m_freem(inp->control);
3374                 inp->control = NULL;
3375         }
3376         if (inp->pkt) {
3377                 sctp_m_freem(inp->pkt);
3378                 inp->pkt = NULL;
3379         }
3380         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3381                                          * here but I will be nice :> (i.e.
3382                                          * ip_pcb = ep;) */
3383         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3384                 int cnt_in_sd;
3385
3386                 cnt_in_sd = 0;
3387                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3388                         SCTP_TCB_LOCK(asoc);
3389                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3390                                 /* Skip guys being freed */
3391                                 cnt_in_sd++;
3392                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3393                                         /*
3394                                          * Special case - we did not start a
3395                                          * kill timer on the asoc due to it
3396                                          * was not closed. So go ahead and
3397                                          * start it now.
3398                                          */
3399                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3400                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3401                                 }
3402                                 SCTP_TCB_UNLOCK(asoc);
3403                                 continue;
3404                         }
3405                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3406                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3407                             (asoc->asoc.total_output_queue_size == 0)) {
3408                                 /*
3409                                  * If we have data in queue, we don't want
3410                                  * to just free since the app may have done,
3411                                  * send()/close or connect/send/close. And
3412                                  * it wants the data to get across first.
3413                                  */
3414                                 /* Just abandon things in the front states */
3415                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3416                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3417                                         cnt_in_sd++;
3418                                 }
3419                                 continue;
3420                         }
3421                         /* Disconnect the socket please */
3422                         asoc->sctp_socket = NULL;
3423                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3424                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3425                             (asoc->asoc.control_pdapi) ||
3426                             (asoc->asoc.size_on_all_streams > 0) ||
3427                             (so && (so->so_rcv.sb_cc > 0))) {
3428                                 /* Left with Data unread */
3429                                 struct mbuf *op_err;
3430
3431                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3432                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3433                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3434                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3435                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3436                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3437                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3438                                 }
3439                                 if (sctp_free_assoc(inp, asoc,
3440                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3441                                         cnt_in_sd++;
3442                                 }
3443                                 continue;
3444                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3445                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3446                             (asoc->asoc.stream_queue_cnt == 0)) {
3447                                 if (asoc->asoc.locked_on_sending) {
3448                                         goto abort_anyway;
3449                                 }
3450                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3451                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3452                                         struct sctp_nets *netp;
3453
3454                                         /*
3455                                          * there is nothing queued to send,
3456                                          * so I send shutdown
3457                                          */
3458                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3459                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3460                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3461                                         }
3462                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3463                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3464                                         sctp_stop_timers_for_shutdown(asoc);
3465                                         if (asoc->asoc.alternate) {
3466                                                 netp = asoc->asoc.alternate;
3467                                         } else {
3468                                                 netp = asoc->asoc.primary_destination;
3469                                         }
3470                                         sctp_send_shutdown(asoc, netp);
3471                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3472                                             netp);
3473                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3474                                             asoc->asoc.primary_destination);
3475                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3476                                 }
3477                         } else {
3478                                 /* mark into shutdown pending */
3479                                 struct sctp_stream_queue_pending *sp;
3480
3481                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3482                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3483                                     asoc->asoc.primary_destination);
3484                                 if (asoc->asoc.locked_on_sending) {
3485                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3486                                             sctp_streamhead);
3487                                         if (sp == NULL) {
3488                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3489                                                     (void *)asoc->asoc.locked_on_sending,
3490                                                     asoc->asoc.locked_on_sending->stream_no);
3491                                         } else {
3492                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3493                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3494                                         }
3495                                 }
3496                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3497                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3498                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3499                                         struct mbuf *op_err;
3500
3501                         abort_anyway:
3502                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3503                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3504                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3505                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3506                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3507                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3508                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3509                                         }
3510                                         if (sctp_free_assoc(inp, asoc,
3511                                             SCTP_PCBFREE_NOFORCE,
3512                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3513                                                 cnt_in_sd++;
3514                                         }
3515                                         continue;
3516                                 } else {
3517                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3518                                 }
3519                         }
3520                         cnt_in_sd++;
3521                         SCTP_TCB_UNLOCK(asoc);
3522                 }
3523                 /* now is there some left in our SHUTDOWN state? */
3524                 if (cnt_in_sd) {
3525 #ifdef SCTP_LOG_CLOSING
3526                         sctp_log_closing(inp, NULL, 2);
3527 #endif
3528                         inp->sctp_socket = NULL;
3529                         SCTP_INP_WUNLOCK(inp);
3530                         SCTP_ASOC_CREATE_UNLOCK(inp);
3531                         SCTP_INP_INFO_WUNLOCK();
3532                         return;
3533                 }
3534         }
3535         inp->sctp_socket = NULL;
3536         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3537             SCTP_PCB_FLAGS_UNBOUND) {
3538                 /*
3539                  * ok, this guy has been bound. It's port is somewhere in
3540                  * the SCTP_BASE_INFO(hash table). Remove it!
3541                  */
3542                 LIST_REMOVE(inp, sctp_hash);
3543                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3544         }
3545         /*
3546          * If there is a timer running to kill us, forget it, since it may
3547          * have a contest on the INP lock.. which would cause us to die ...
3548          */
3549         cnt = 0;
3550         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3551                 SCTP_TCB_LOCK(asoc);
3552                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3553                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3554                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3555                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3556                         }
3557                         cnt++;
3558                         SCTP_TCB_UNLOCK(asoc);
3559                         continue;
3560                 }
3561                 /* Free associations that are NOT killing us */
3562                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3563                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3564                         struct mbuf *op_err;
3565
3566                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3567                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3568                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3569                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3570                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3571                         cnt++;
3572                         SCTP_TCB_UNLOCK(asoc);
3573                         continue;
3574                 }
3575                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3576                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3577                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3578                 }
3579                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE,
3580                     SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3581                         cnt++;
3582                 }
3583         }
3584         if (cnt) {
3585                 /* Ok we have someone out there that will kill us */
3586                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3587 #ifdef SCTP_LOG_CLOSING
3588                 sctp_log_closing(inp, NULL, 3);
3589 #endif
3590                 SCTP_INP_WUNLOCK(inp);
3591                 SCTP_ASOC_CREATE_UNLOCK(inp);
3592                 SCTP_INP_INFO_WUNLOCK();
3593                 return;
3594         }
3595         if (SCTP_INP_LOCK_CONTENDED(inp))
3596                 being_refed++;
3597         if (SCTP_INP_READ_CONTENDED(inp))
3598                 being_refed++;
3599         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3600                 being_refed++;
3601
3602         if ((inp->refcount) ||
3603             (being_refed) ||
3604             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3605                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3606 #ifdef SCTP_LOG_CLOSING
3607                 sctp_log_closing(inp, NULL, 4);
3608 #endif
3609                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3610                 SCTP_INP_WUNLOCK(inp);
3611                 SCTP_ASOC_CREATE_UNLOCK(inp);
3612                 SCTP_INP_INFO_WUNLOCK();
3613                 return;
3614         }
3615         inp->sctp_ep.signature_change.type = 0;
3616         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3617         /*
3618          * Remove it from the list .. last thing we need a lock for.
3619          */
3620         LIST_REMOVE(inp, sctp_list);
3621         SCTP_INP_WUNLOCK(inp);
3622         SCTP_ASOC_CREATE_UNLOCK(inp);
3623         SCTP_INP_INFO_WUNLOCK();
3624         /*
3625          * Now we release all locks. Since this INP cannot be found anymore
3626          * except possibly by the kill timer that might be running. We call
3627          * the drain function here. It should hit the case were it sees the
3628          * ACTIVE flag cleared and exit out freeing us to proceed and
3629          * destroy everything.
3630          */
3631         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3632                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3633         } else {
3634                 /* Probably un-needed */
3635                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3636         }
3637
3638 #ifdef SCTP_LOG_CLOSING
3639         sctp_log_closing(inp, NULL, 5);
3640 #endif
3641
3642
3643         if ((inp->sctp_asocidhash) != NULL) {
3644                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3645                 inp->sctp_asocidhash = NULL;
3646         }
3647         /* sa_ignore FREED_MEMORY */
3648         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3649                 /* Its only abandoned if it had data left */
3650                 if (sq->length)
3651                         SCTP_STAT_INCR(sctps_left_abandon);
3652
3653                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3654                 sctp_free_remote_addr(sq->whoFrom);
3655                 if (so)
3656                         so->so_rcv.sb_cc -= sq->length;
3657                 if (sq->data) {
3658                         sctp_m_freem(sq->data);
3659                         sq->data = NULL;
3660                 }
3661                 /*
3662                  * no need to free the net count, since at this point all
3663                  * assoc's are gone.
3664                  */
3665                 sctp_free_a_readq(NULL, sq);
3666         }
3667         /* Now the sctp_pcb things */
3668         /*
3669          * free each asoc if it is not already closed/free. we can't use the
3670          * macro here since le_next will get freed as part of the
3671          * sctp_free_assoc() call.
3672          */
3673 #ifdef IPSEC
3674         ipsec_delete_pcbpolicy(ip_pcb);
3675 #endif
3676         if (ip_pcb->inp_options) {
3677                 (void)sctp_m_free(ip_pcb->inp_options);
3678                 ip_pcb->inp_options = 0;
3679         }
3680 #ifdef INET6
3681         if (ip_pcb->inp_vflag & INP_IPV6) {
3682                 struct in6pcb *in6p;
3683
3684                 in6p = (struct in6pcb *)inp;
3685                 ip6_freepcbopts(in6p->in6p_outputopts);
3686         }
3687 #endif                          /* INET6 */
3688         ip_pcb->inp_vflag = 0;
3689         /* free up authentication fields */
3690         if (inp->sctp_ep.local_auth_chunks != NULL)
3691                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3692         if (inp->sctp_ep.local_hmacs != NULL)
3693                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3694
3695         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3696                 LIST_REMOVE(shared_key, next);
3697                 sctp_free_sharedkey(shared_key);
3698                 /* sa_ignore FREED_MEMORY */
3699         }
3700
3701         /*
3702          * if we have an address list the following will free the list of
3703          * ifaddr's that are set into this ep. Again macro limitations here,
3704          * since the LIST_FOREACH could be a bad idea.
3705          */
3706         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3707                 sctp_remove_laddr(laddr);
3708         }
3709
3710 #ifdef SCTP_TRACK_FREED_ASOCS
3711         /* TEMP CODE */
3712         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3713                 LIST_REMOVE(asoc, sctp_tcblist);
3714                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3715                 SCTP_DECR_ASOC_COUNT();
3716         }
3717         /* *** END TEMP CODE *** */
3718 #endif
3719         /* Now lets see about freeing the EP hash table. */
3720         if (inp->sctp_tcbhash != NULL) {
3721                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3722                 inp->sctp_tcbhash = NULL;
3723         }
3724         /* Now we must put the ep memory back into the zone pool */
3725         crfree(inp->ip_inp.inp.inp_cred);
3726         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3727         SCTP_INP_LOCK_DESTROY(inp);
3728         SCTP_INP_READ_DESTROY(inp);
3729         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3730         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3731         SCTP_DECR_EP_COUNT();
3732 }
3733
3734
3735 struct sctp_nets *
3736 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3737 {
3738         struct sctp_nets *net;
3739
3740         /* locate the address */
3741         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3742                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3743                         return (net);
3744         }
3745         return (NULL);
3746 }
3747
3748
3749 int
3750 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3751 {
3752         struct sctp_ifa *sctp_ifa;
3753
3754         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3755         if (sctp_ifa) {
3756                 return (1);
3757         } else {
3758                 return (0);
3759         }
3760 }
3761
3762 /*
3763  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3764  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3765  * stats of stuff.
3766  */
3767 int
3768 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3769     struct sctp_nets **netp, int set_scope, int from)
3770 {
3771         /*
3772          * The following is redundant to the same lines in the
3773          * sctp_aloc_assoc() but is needed since others call the add address
3774          * function
3775          */
3776         struct sctp_nets *net, *netfirst;
3777         int addr_inscope;
3778
3779         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3780             from);
3781         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3782
3783         netfirst = sctp_findnet(stcb, newaddr);
3784         if (netfirst) {
3785                 /*
3786                  * Lie and return ok, we don't want to make the association
3787                  * go away for this behavior. It will happen in the TCP
3788                  * model in a connected socket. It does not reach the hash
3789                  * table until after the association is built so it can't be
3790                  * found. Mark as reachable, since the initial creation will
3791                  * have been cleared and the NOT_IN_ASSOC flag will have
3792                  * been added... and we don't want to end up removing it
3793                  * back out.
3794                  */
3795                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3796                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3797                             SCTP_ADDR_UNCONFIRMED);
3798                 } else {
3799                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3800                 }
3801
3802                 return (0);
3803         }
3804         addr_inscope = 1;
3805         switch (newaddr->sa_family) {
3806 #ifdef INET
3807         case AF_INET:
3808                 {
3809                         struct sockaddr_in *sin;
3810
3811                         sin = (struct sockaddr_in *)newaddr;
3812                         if (sin->sin_addr.s_addr == 0) {
3813                                 /* Invalid address */
3814                                 return (-1);
3815                         }
3816                         /* zero out the bzero area */
3817                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3818
3819                         /* assure len is set */
3820                         sin->sin_len = sizeof(struct sockaddr_in);
3821                         if (set_scope) {
3822                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3823                                         stcb->asoc.scope.ipv4_local_scope = 1;
3824                                 }
3825                         } else {
3826                                 /* Validate the address is in scope */
3827                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3828                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3829                                         addr_inscope = 0;
3830                                 }
3831                         }
3832                         break;
3833                 }
3834 #endif
3835 #ifdef INET6
3836         case AF_INET6:
3837                 {
3838                         struct sockaddr_in6 *sin6;
3839
3840                         sin6 = (struct sockaddr_in6 *)newaddr;
3841                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3842                                 /* Invalid address */
3843                                 return (-1);
3844                         }
3845                         /* assure len is set */
3846                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3847                         if (set_scope) {
3848                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3849                                         stcb->asoc.scope.loopback_scope = 1;
3850                                         stcb->asoc.scope.local_scope = 0;
3851                                         stcb->asoc.scope.ipv4_local_scope = 1;
3852                                         stcb->asoc.scope.site_scope = 1;
3853                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3854                                         /*
3855                                          * If the new destination is a
3856                                          * LINK_LOCAL we must have common
3857                                          * site scope. Don't set the local
3858                                          * scope since we may not share all
3859                                          * links, only loopback can do this.
3860                                          * Links on the local network would
3861                                          * also be on our private network
3862                                          * for v4 too.
3863                                          */
3864                                         stcb->asoc.scope.ipv4_local_scope = 1;
3865                                         stcb->asoc.scope.site_scope = 1;
3866                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3867                                         /*
3868                                          * If the new destination is
3869                                          * SITE_LOCAL then we must have site
3870                                          * scope in common.
3871                                          */
3872                                         stcb->asoc.scope.site_scope = 1;
3873                                 }
3874                         } else {
3875                                 /* Validate the address is in scope */
3876                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3877                                     (stcb->asoc.scope.loopback_scope == 0)) {
3878                                         addr_inscope = 0;
3879                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3880                                     (stcb->asoc.scope.local_scope == 0)) {
3881                                         addr_inscope = 0;
3882                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3883                                     (stcb->asoc.scope.site_scope == 0)) {
3884                                         addr_inscope = 0;
3885                                 }
3886                         }
3887                         break;
3888                 }
3889 #endif
3890         default:
3891                 /* not supported family type */
3892                 return (-1);
3893         }
3894         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3895         if (net == NULL) {
3896                 return (-1);
3897         }
3898         SCTP_INCR_RADDR_COUNT();
3899         bzero(net, sizeof(struct sctp_nets));
3900         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3901         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3902         switch (newaddr->sa_family) {
3903 #ifdef INET
3904         case AF_INET:
3905                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3906                 break;
3907 #endif
3908 #ifdef INET6
3909         case AF_INET6:
3910                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3911                 break;
3912 #endif
3913         default:
3914                 break;
3915         }
3916         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3917         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3918                 stcb->asoc.scope.loopback_scope = 1;
3919                 stcb->asoc.scope.ipv4_local_scope = 1;
3920                 stcb->asoc.scope.local_scope = 0;
3921                 stcb->asoc.scope.site_scope = 1;
3922                 addr_inscope = 1;
3923         }
3924         net->failure_threshold = stcb->asoc.def_net_failure;
3925         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3926         if (addr_inscope == 0) {
3927                 net->dest_state = (SCTP_ADDR_REACHABLE |
3928                     SCTP_ADDR_OUT_OF_SCOPE);
3929         } else {
3930                 if (from == SCTP_ADDR_IS_CONFIRMED)
3931                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3932                         net->dest_state = SCTP_ADDR_REACHABLE;
3933                 else
3934                         net->dest_state = SCTP_ADDR_REACHABLE |
3935                             SCTP_ADDR_UNCONFIRMED;
3936         }
3937         /*
3938          * We set this to 0, the timer code knows that this means its an
3939          * initial value
3940          */
3941         net->rto_needed = 1;
3942         net->RTO = 0;
3943         net->RTO_measured = 0;
3944         stcb->asoc.numnets++;
3945         net->ref_count = 1;
3946         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3947         net->port = stcb->asoc.port;
3948         net->dscp = stcb->asoc.default_dscp;
3949 #ifdef INET6
3950         net->flowlabel = stcb->asoc.default_flowlabel;
3951 #endif
3952         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3953                 net->dest_state |= SCTP_ADDR_NOHB;
3954         } else {
3955                 net->dest_state &= ~SCTP_ADDR_NOHB;
3956         }
3957         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3958                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3959         } else {
3960                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3961         }
3962         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3963         /* Init the timer structure */
3964         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3965         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3966         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3967
3968         /* Now generate a route for this guy */
3969 #ifdef INET6
3970         /* KAME hack: embed scopeid */
3971         if (newaddr->sa_family == AF_INET6) {
3972                 struct sockaddr_in6 *sin6;
3973
3974                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3975                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3976                 sin6->sin6_scope_id = 0;
3977         }
3978 #endif
3979         SCTP_RTALLOC((sctp_route_t *) & net->ro,
3980             stcb->asoc.vrf_id,
3981             stcb->sctp_ep->fibnum);
3982
3983         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3984                 /* Get source address */
3985                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3986                     stcb,
3987                     (sctp_route_t *) & net->ro,
3988                     net,
3989                     0,
3990                     stcb->asoc.vrf_id);
3991                 if (net->ro._s_addr != NULL) {
3992                         net->src_addr_selected = 1;
3993                         /* Now get the interface MTU */
3994                         if (net->ro._s_addr->ifn_p != NULL) {
3995                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3996                         }
3997                 } else {
3998                         net->src_addr_selected = 0;
3999                 }
4000                 if (net->mtu > 0) {
4001                         uint32_t rmtu;
4002
4003                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
4004                         if (rmtu == 0) {
4005                                 /*
4006                                  * Start things off to match mtu of
4007                                  * interface please.
4008                                  */
4009                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
4010                                     net->ro.ro_rt, net->mtu);
4011                         } else {
4012                                 /*
4013                                  * we take the route mtu over the interface,
4014                                  * since the route may be leading out the
4015                                  * loopback, or a different interface.
4016                                  */
4017                                 net->mtu = rmtu;
4018                         }
4019                 }
4020         } else {
4021                 net->src_addr_selected = 0;
4022         }
4023         if (net->mtu == 0) {
4024                 switch (newaddr->sa_family) {
4025 #ifdef INET
4026                 case AF_INET:
4027                         net->mtu = SCTP_DEFAULT_MTU;
4028                         break;
4029 #endif
4030 #ifdef INET6
4031                 case AF_INET6:
4032                         net->mtu = 1280;
4033                         break;
4034 #endif
4035                 default:
4036                         break;
4037                 }
4038         }
4039 #if defined(INET) || defined(INET6)
4040         if (net->port) {
4041                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4042         }
4043 #endif
4044         if (from == SCTP_ALLOC_ASOC) {
4045                 stcb->asoc.smallest_mtu = net->mtu;
4046         }
4047         if (stcb->asoc.smallest_mtu > net->mtu) {
4048                 stcb->asoc.smallest_mtu = net->mtu;
4049         }
4050 #ifdef INET6
4051         if (newaddr->sa_family == AF_INET6) {
4052                 struct sockaddr_in6 *sin6;
4053
4054                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4055                 (void)sa6_recoverscope(sin6);
4056         }
4057 #endif
4058
4059         /* JRS - Use the congestion control given in the CC module */
4060         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4061                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4062
4063         /*
4064          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4065          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4066          */
4067         net->find_pseudo_cumack = 1;
4068         net->find_rtx_pseudo_cumack = 1;
4069         /* Choose an initial flowid. */
4070         net->flowid = stcb->asoc.my_vtag ^
4071             ntohs(stcb->rport) ^
4072             ntohs(stcb->sctp_ep->sctp_lport);
4073         net->flowtype = M_HASHTYPE_OPAQUE;
4074         if (netp) {
4075                 *netp = net;
4076         }
4077         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4078         if (net->ro.ro_rt == NULL) {
4079                 /* Since we have no route put it at the back */
4080                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4081         } else if (netfirst == NULL) {
4082                 /* We are the first one in the pool. */
4083                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4084         } else if (netfirst->ro.ro_rt == NULL) {
4085                 /*
4086                  * First one has NO route. Place this one ahead of the first
4087                  * one.
4088                  */
4089                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4090         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4091                 /*
4092                  * This one has a different interface than the one at the
4093                  * top of the list. Place it ahead.
4094                  */
4095                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4096         } else {
4097                 /*
4098                  * Ok we have the same interface as the first one. Move
4099                  * forward until we find either a) one with a NULL route...
4100                  * insert ahead of that b) one with a different ifp.. insert
4101                  * after that. c) end of the list.. insert at the tail.
4102                  */
4103                 struct sctp_nets *netlook;
4104
4105                 do {
4106                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4107                         if (netlook == NULL) {
4108                                 /* End of the list */
4109                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4110                                 break;
4111                         } else if (netlook->ro.ro_rt == NULL) {
4112                                 /* next one has NO route */
4113                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4114                                 break;
4115                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4116                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4117                                     net, sctp_next);
4118                                 break;
4119                         }
4120                         /* Shift forward */
4121                         netfirst = netlook;
4122                 } while (netlook != NULL);
4123         }
4124
4125         /* got to have a primary set */
4126         if (stcb->asoc.primary_destination == 0) {
4127                 stcb->asoc.primary_destination = net;
4128         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4129                     (net->ro.ro_rt) &&
4130             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4131                 /* No route to current primary adopt new primary */
4132                 stcb->asoc.primary_destination = net;
4133         }
4134         /* Validate primary is first */
4135         net = TAILQ_FIRST(&stcb->asoc.nets);
4136         if ((net != stcb->asoc.primary_destination) &&
4137             (stcb->asoc.primary_destination)) {
4138                 /*
4139                  * first one on the list is NOT the primary sctp_cmpaddr()
4140                  * is much more efficient if the primary is the first on the
4141                  * list, make it so.
4142                  */
4143                 TAILQ_REMOVE(&stcb->asoc.nets,
4144                     stcb->asoc.primary_destination, sctp_next);
4145                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4146                     stcb->asoc.primary_destination, sctp_next);
4147         }
4148         return (0);
4149 }
4150
4151
4152 static uint32_t
4153 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4154 {
4155         uint32_t id;
4156         struct sctpasochead *head;
4157         struct sctp_tcb *lstcb;
4158
4159         SCTP_INP_WLOCK(inp);
4160 try_again:
4161         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4162                 /* TSNH */
4163                 SCTP_INP_WUNLOCK(inp);
4164                 return (0);
4165         }
4166         /*
4167          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4168          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4169          */
4170         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4171                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4172         }
4173         id = inp->sctp_associd_counter;
4174         inp->sctp_associd_counter++;
4175         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4176         if (lstcb) {
4177                 goto try_again;
4178         }
4179         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4180         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4181         stcb->asoc.in_asocid_hash = 1;
4182         SCTP_INP_WUNLOCK(inp);
4183         return id;
4184 }
4185
4186 /*
4187  * allocate an association and add it to the endpoint. The caller must be
4188  * careful to add all additional addresses once they are know right away or
4189  * else the assoc will be may experience a blackout scenario.
4190  */
4191 struct sctp_tcb *
4192 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4193     int *error, uint32_t override_tag, uint32_t vrf_id,
4194     uint16_t o_streams,
4195     struct thread *p
4196 )
4197 {
4198         /* note the p argument is only valid in unbound sockets */
4199
4200         struct sctp_tcb *stcb;
4201         struct sctp_association *asoc;
4202         struct sctpasochead *head;
4203         uint16_t rport;
4204         int err;
4205
4206         /*
4207          * Assumption made here: Caller has done a
4208          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4209          * address does not exist already.
4210          */
4211         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4212                 /* Hit max assoc, sorry no more */
4213                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4214                 *error = ENOBUFS;
4215                 return (NULL);
4216         }
4217         if (firstaddr == NULL) {
4218                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4219                 *error = EINVAL;
4220                 return (NULL);
4221         }
4222         SCTP_INP_RLOCK(inp);
4223         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4224             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4225             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4226                 /*
4227                  * If its in the TCP pool, its NOT allowed to create an
4228                  * association. The parent listener needs to call
4229                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4230                  * off, or connected one does this.. its an error.
4231                  */
4232                 SCTP_INP_RUNLOCK(inp);
4233                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4234                 *error = EINVAL;
4235                 return (NULL);
4236         }
4237         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4238             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4239                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4240                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4241                         SCTP_INP_RUNLOCK(inp);
4242                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4243                         *error = EINVAL;
4244                         return (NULL);
4245                 }
4246         }
4247         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4248 #ifdef SCTP_DEBUG
4249         if (firstaddr) {
4250                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4251                 switch (firstaddr->sa_family) {
4252 #ifdef INET
4253                 case AF_INET:
4254                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4255                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4256                         break;
4257 #endif
4258 #ifdef INET6
4259                 case AF_INET6:
4260                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4261                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4262                         break;
4263 #endif
4264                 default:
4265                         break;
4266                 }
4267         } else {
4268                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4269         }
4270 #endif                          /* SCTP_DEBUG */
4271         switch (firstaddr->sa_family) {
4272 #ifdef INET
4273         case AF_INET:
4274                 {
4275                         struct sockaddr_in *sin;
4276
4277                         sin = (struct sockaddr_in *)firstaddr;
4278                         if ((ntohs(sin->sin_port) == 0) ||
4279                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4280                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4281                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4282                                 /* Invalid address */
4283                                 SCTP_INP_RUNLOCK(inp);
4284                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4285                                 *error = EINVAL;
4286                                 return (NULL);
4287                         }
4288                         rport = sin->sin_port;
4289                         break;
4290                 }
4291 #endif
4292 #ifdef INET6
4293         case AF_INET6:
4294                 {
4295                         struct sockaddr_in6 *sin6;
4296
4297                         sin6 = (struct sockaddr_in6 *)firstaddr;
4298                         if ((ntohs(sin6->sin6_port) == 0) ||
4299                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4300                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4301                                 /* Invalid address */
4302                                 SCTP_INP_RUNLOCK(inp);
4303                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4304                                 *error = EINVAL;
4305                                 return (NULL);
4306                         }
4307                         rport = sin6->sin6_port;
4308                         break;
4309                 }
4310 #endif
4311         default:
4312                 /* not supported family type */
4313                 SCTP_INP_RUNLOCK(inp);
4314                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4315                 *error = EINVAL;
4316                 return (NULL);
4317         }
4318         SCTP_INP_RUNLOCK(inp);
4319         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4320                 /*
4321                  * If you have not performed a bind, then we need to do the
4322                  * ephemeral bind for you.
4323                  */
4324                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4325                     (struct sockaddr *)NULL,
4326                     (struct sctp_ifa *)NULL,
4327                     p
4328                     ))) {
4329                         /* bind error, probably perm */
4330                         *error = err;
4331                         return (NULL);
4332                 }
4333         }
4334         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4335         if (stcb == NULL) {
4336                 /* out of memory? */
4337                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4338                 *error = ENOMEM;
4339                 return (NULL);
4340         }
4341         SCTP_INCR_ASOC_COUNT();
4342
4343         bzero(stcb, sizeof(*stcb));
4344         asoc = &stcb->asoc;
4345
4346         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4347         SCTP_TCB_LOCK_INIT(stcb);
4348         SCTP_TCB_SEND_LOCK_INIT(stcb);
4349         stcb->rport = rport;
4350         /* setup back pointer's */
4351         stcb->sctp_ep = inp;
4352         stcb->sctp_socket = inp->sctp_socket;
4353         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) {
4354                 /* failed */
4355                 SCTP_TCB_LOCK_DESTROY(stcb);
4356                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4357                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4358                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4359                 SCTP_DECR_ASOC_COUNT();
4360                 *error = err;
4361                 return (NULL);
4362         }
4363         /* and the port */
4364         SCTP_INP_INFO_WLOCK();
4365         SCTP_INP_WLOCK(inp);
4366         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4367                 /* inpcb freed while alloc going on */
4368                 SCTP_TCB_LOCK_DESTROY(stcb);
4369                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4370                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4371                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4372                 SCTP_INP_WUNLOCK(inp);
4373                 SCTP_INP_INFO_WUNLOCK();
4374                 SCTP_DECR_ASOC_COUNT();
4375                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4376                 *error = EINVAL;
4377                 return (NULL);
4378         }
4379         SCTP_TCB_LOCK(stcb);
4380
4381         /* now that my_vtag is set, add it to the hash */
4382         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4383         /* put it in the bucket in the vtag hash of assoc's for the system */
4384         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4385         SCTP_INP_INFO_WUNLOCK();
4386
4387         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4388                 /* failure.. memory error? */
4389                 if (asoc->strmout) {
4390                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4391                         asoc->strmout = NULL;
4392                 }
4393                 if (asoc->mapping_array) {
4394                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4395                         asoc->mapping_array = NULL;
4396                 }
4397                 if (asoc->nr_mapping_array) {
4398                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4399                         asoc->nr_mapping_array = NULL;
4400                 }
4401                 SCTP_DECR_ASOC_COUNT();
4402                 SCTP_TCB_UNLOCK(stcb);
4403                 SCTP_TCB_LOCK_DESTROY(stcb);
4404                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4405                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4406                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4407                 SCTP_INP_WUNLOCK(inp);
4408                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4409                 *error = ENOBUFS;
4410                 return (NULL);
4411         }
4412         /* Init all the timers */
4413         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4414         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4415         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4416         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4417         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4418         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4419         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4420
4421         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4422         /* now file the port under the hash as well */
4423         if (inp->sctp_tcbhash != NULL) {
4424                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4425                     inp->sctp_hashmark)];
4426                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4427         }
4428         SCTP_INP_WUNLOCK(inp);
4429         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4430         return (stcb);
4431 }
4432
4433
4434 void
4435 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4436 {
4437         struct sctp_association *asoc;
4438
4439         asoc = &stcb->asoc;
4440         asoc->numnets--;
4441         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4442         if (net == asoc->primary_destination) {
4443                 /* Reset primary */
4444                 struct sctp_nets *lnet;
4445
4446                 lnet = TAILQ_FIRST(&asoc->nets);
4447                 /*
4448                  * Mobility adaptation Ideally, if deleted destination is
4449                  * the primary, it becomes a fast retransmission trigger by
4450                  * the subsequent SET PRIMARY. (by micchie)
4451                  */
4452                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4453                     SCTP_MOBILITY_BASE) ||
4454                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4455                     SCTP_MOBILITY_FASTHANDOFF)) {
4456                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4457                         if (asoc->deleted_primary != NULL) {
4458                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4459                                 goto out;
4460                         }
4461                         asoc->deleted_primary = net;
4462                         atomic_add_int(&net->ref_count, 1);
4463                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4464                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4465                         sctp_mobility_feature_on(stcb->sctp_ep,
4466                             SCTP_MOBILITY_PRIM_DELETED);
4467                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4468                             stcb->sctp_ep, stcb, NULL);
4469                 }
4470 out:
4471                 /* Try to find a confirmed primary */
4472                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4473         }
4474         if (net == asoc->last_data_chunk_from) {
4475                 /* Reset primary */
4476                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4477         }
4478         if (net == asoc->last_control_chunk_from) {
4479                 /* Clear net */
4480                 asoc->last_control_chunk_from = NULL;
4481         }
4482         if (net == stcb->asoc.alternate) {
4483                 sctp_free_remote_addr(stcb->asoc.alternate);
4484                 stcb->asoc.alternate = NULL;
4485         }
4486         sctp_free_remote_addr(net);
4487 }
4488
4489 /*
4490  * remove a remote endpoint address from an association, it will fail if the
4491  * address does not exist.
4492  */
4493 int
4494 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4495 {
4496         /*
4497          * Here we need to remove a remote address. This is quite simple, we
4498          * first find it in the list of address for the association
4499          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4500          * on that item. Note we do not allow it to be removed if there are
4501          * no other addresses.
4502          */
4503         struct sctp_association *asoc;
4504         struct sctp_nets *net, *nnet;
4505
4506         asoc = &stcb->asoc;
4507
4508         /* locate the address */
4509         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4510                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4511                         continue;
4512                 }
4513                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4514                     remaddr)) {
4515                         /* we found the guy */
4516                         if (asoc->numnets < 2) {
4517                                 /* Must have at LEAST two remote addresses */
4518                                 return (-1);
4519                         } else {
4520                                 sctp_remove_net(stcb, net);
4521                                 return (0);
4522                         }
4523                 }
4524         }
4525         /* not found. */
4526         return (-2);
4527 }
4528
4529 void
4530 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4531 {
4532         struct sctpvtaghead *chain;
4533         struct sctp_tagblock *twait_block;
4534         int found = 0;
4535         int i;
4536
4537         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4538         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4539                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4540                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4541                             (twait_block->vtag_block[i].lport == lport) &&
4542                             (twait_block->vtag_block[i].rport == rport)) {
4543                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4544                                 twait_block->vtag_block[i].v_tag = 0;
4545                                 twait_block->vtag_block[i].lport = 0;
4546                                 twait_block->vtag_block[i].rport = 0;
4547                                 found = 1;
4548                                 break;
4549                         }
4550                 }
4551                 if (found)
4552                         break;
4553         }
4554 }
4555
4556 int
4557 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4558 {
4559         struct sctpvtaghead *chain;
4560         struct sctp_tagblock *twait_block;
4561         int found = 0;
4562         int i;
4563
4564         SCTP_INP_INFO_WLOCK();
4565         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4566         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4567                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4568                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4569                             (twait_block->vtag_block[i].lport == lport) &&
4570                             (twait_block->vtag_block[i].rport == rport)) {
4571                                 found = 1;
4572                                 break;
4573                         }
4574                 }
4575                 if (found)
4576                         break;
4577         }
4578         SCTP_INP_INFO_WUNLOCK();
4579         return (found);
4580 }
4581
4582
4583 void
4584 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4585 {
4586         struct sctpvtaghead *chain;
4587         struct sctp_tagblock *twait_block;
4588         struct timeval now;
4589         int set, i;
4590
4591         if (time == 0) {
4592                 /* Its disabled */
4593                 return;
4594         }
4595         (void)SCTP_GETTIME_TIMEVAL(&now);
4596         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4597         set = 0;
4598         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4599                 /* Block(s) present, lets find space, and expire on the fly */
4600                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4601                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4602                             !set) {
4603                                 twait_block->vtag_block[i].tv_sec_at_expire =
4604                                     now.tv_sec + time;
4605                                 twait_block->vtag_block[i].v_tag = tag;
4606                                 twait_block->vtag_block[i].lport = lport;
4607                                 twait_block->vtag_block[i].rport = rport;
4608                                 set = 1;
4609                         } else if ((twait_block->vtag_block[i].v_tag) &&
4610                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4611                                 /* Audit expires this guy */
4612                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4613                                 twait_block->vtag_block[i].v_tag = 0;
4614                                 twait_block->vtag_block[i].lport = 0;
4615                                 twait_block->vtag_block[i].rport = 0;
4616                                 if (set == 0) {
4617                                         /* Reuse it for my new tag */
4618                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4619                                         twait_block->vtag_block[i].v_tag = tag;
4620                                         twait_block->vtag_block[i].lport = lport;
4621                                         twait_block->vtag_block[i].rport = rport;
4622                                         set = 1;
4623                                 }
4624                         }
4625                 }
4626                 if (set) {
4627                         /*
4628                          * We only do up to the block where we can place our
4629                          * tag for audits
4630                          */
4631                         break;
4632                 }
4633         }
4634         /* Need to add a new block to chain */
4635         if (!set) {
4636                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4637                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4638                 if (twait_block == NULL) {
4639 #ifdef INVARIANTS
4640                         panic("Can not alloc tagblock");
4641 #endif
4642                         return;
4643                 }
4644                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4645                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4646                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4647                 twait_block->vtag_block[0].v_tag = tag;
4648                 twait_block->vtag_block[0].lport = lport;
4649                 twait_block->vtag_block[0].rport = rport;
4650         }
4651 }
4652
4653 void
4654 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh)
4655 {
4656         struct sctp_tmit_chunk *chk, *nchk;
4657         struct sctp_queued_to_read *ctl, *nctl;
4658
4659         TAILQ_FOREACH_SAFE(ctl, rh, next_instrm, nctl) {
4660                 TAILQ_REMOVE(rh, ctl, next_instrm);
4661                 ctl->on_strm_q = 0;
4662                 if (ctl->on_read_q == 0) {
4663                         sctp_free_remote_addr(ctl->whoFrom);
4664                         if (ctl->data) {
4665                                 sctp_m_freem(ctl->data);
4666                                 ctl->data = NULL;
4667                         }
4668                 }
4669                 /* Reassembly free? */
4670                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
4671                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
4672                         if (chk->data) {
4673                                 sctp_m_freem(chk->data);
4674                                 chk->data = NULL;
4675                         }
4676                         if (chk->holds_key_ref)
4677                                 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4678                         sctp_free_remote_addr(chk->whoTo);
4679                         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4680                         SCTP_DECR_CHK_COUNT();
4681                         /* sa_ignore FREED_MEMORY */
4682                 }
4683                 /*
4684                  * We don't free the address here since all the net's were
4685                  * freed above.
4686                  */
4687                 if (ctl->on_read_q == 0) {
4688                         sctp_free_a_readq(stcb, ctl);
4689                 }
4690         }
4691 }
4692
4693
4694 /*-
4695  * Free the association after un-hashing the remote port. This
4696  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4697  * expect that the input to this function IS a locked TCB.
4698  * It will return 0, if it did NOT destroy the association (instead
4699  * it unlocks it. It will return NON-zero if it either destroyed the
4700  * association OR the association is already destroyed.
4701  */
4702 int
4703 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4704 {
4705         int i;
4706         struct sctp_association *asoc;
4707         struct sctp_nets *net, *nnet;
4708         struct sctp_laddr *laddr, *naddr;
4709         struct sctp_tmit_chunk *chk, *nchk;
4710         struct sctp_asconf_addr *aparam, *naparam;
4711         struct sctp_asconf_ack *aack, *naack;
4712         struct sctp_stream_reset_list *strrst, *nstrrst;
4713         struct sctp_queued_to_read *sq, *nsq;
4714         struct sctp_stream_queue_pending *sp, *nsp;
4715         sctp_sharedkey_t *shared_key, *nshared_key;
4716         struct socket *so;
4717
4718         /* first, lets purge the entry from the hash table. */
4719
4720 #ifdef SCTP_LOG_CLOSING
4721         sctp_log_closing(inp, stcb, 6);
4722 #endif
4723         if (stcb->asoc.state == 0) {
4724 #ifdef SCTP_LOG_CLOSING
4725                 sctp_log_closing(inp, NULL, 7);
4726 #endif
4727                 /* there is no asoc, really TSNH :-0 */
4728                 return (1);
4729         }
4730         if (stcb->asoc.alternate) {
4731                 sctp_free_remote_addr(stcb->asoc.alternate);
4732                 stcb->asoc.alternate = NULL;
4733         }
4734         /* TEMP CODE */
4735         if (stcb->freed_from_where == 0) {
4736                 /* Only record the first place free happened from */
4737                 stcb->freed_from_where = from_location;
4738         }
4739         /* TEMP CODE */
4740
4741         asoc = &stcb->asoc;
4742         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4743             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4744                 /* nothing around */
4745                 so = NULL;
4746         else
4747                 so = inp->sctp_socket;
4748
4749         /*
4750          * We used timer based freeing if a reader or writer is in the way.
4751          * So we first check if we are actually being called from a timer,
4752          * if so we abort early if a reader or writer is still in the way.
4753          */
4754         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4755             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4756                 /*
4757                  * is it the timer driving us? if so are the reader/writers
4758                  * gone?
4759                  */
4760                 if (stcb->asoc.refcnt) {
4761                         /* nope, reader or writer in the way */
4762                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4763                         /* no asoc destroyed */
4764                         SCTP_TCB_UNLOCK(stcb);
4765 #ifdef SCTP_LOG_CLOSING
4766                         sctp_log_closing(inp, stcb, 8);
4767 #endif
4768                         return (0);
4769                 }
4770         }
4771         /* now clean up any other timers */
4772         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4773         asoc->dack_timer.self = NULL;
4774         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4775         /*-
4776          * For stream reset we don't blast this unless
4777          * it is a str-reset timer, it might be the
4778          * free-asoc timer which we DON'T want to
4779          * disturb.
4780          */
4781         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4782                 asoc->strreset_timer.self = NULL;
4783         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4784         asoc->asconf_timer.self = NULL;
4785         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4786         asoc->autoclose_timer.self = NULL;
4787         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4788         asoc->shut_guard_timer.self = NULL;
4789         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4790         asoc->delayed_event_timer.self = NULL;
4791         /* Mobility adaptation */
4792         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4793         asoc->delete_prim_timer.self = NULL;
4794         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4795                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4796                 net->rxt_timer.self = NULL;
4797                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4798                 net->pmtu_timer.self = NULL;
4799                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4800                 net->hb_timer.self = NULL;
4801         }
4802         /* Now the read queue needs to be cleaned up (only once) */
4803         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4804                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4805                 SCTP_INP_READ_LOCK(inp);
4806                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4807                         if (sq->stcb == stcb) {
4808                                 sq->do_not_ref_stcb = 1;
4809                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4810                                 /*
4811                                  * If there is no end, there never will be
4812                                  * now.
4813                                  */
4814                                 if (sq->end_added == 0) {
4815                                         /* Held for PD-API clear that. */
4816                                         sq->pdapi_aborted = 1;
4817                                         sq->held_length = 0;
4818                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4819                                                 /*
4820                                                  * Need to add a PD-API
4821                                                  * aborted indication.
4822                                                  * Setting the control_pdapi
4823                                                  * assures that it will be
4824                                                  * added right after this
4825                                                  * msg.
4826                                                  */
4827                                                 uint32_t strseq;
4828
4829                                                 stcb->asoc.control_pdapi = sq;
4830                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4831                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4832                                                     stcb,
4833                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4834                                                     (void *)&strseq,
4835                                                     SCTP_SO_LOCKED);
4836                                                 stcb->asoc.control_pdapi = NULL;
4837                                         }
4838                                 }
4839                                 /* Add an end to wake them */
4840                                 sq->end_added = 1;
4841                         }
4842                 }
4843                 SCTP_INP_READ_UNLOCK(inp);
4844                 if (stcb->block_entry) {
4845                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4846                         stcb->block_entry->error = ECONNRESET;
4847                         stcb->block_entry = NULL;
4848                 }
4849         }
4850         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4851                 /*
4852                  * Someone holds a reference OR the socket is unaccepted
4853                  * yet.
4854                  */
4855                 if ((stcb->asoc.refcnt) ||
4856                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4857                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4858                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4859                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4860                 }
4861                 SCTP_TCB_UNLOCK(stcb);
4862                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4863                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4864                         /* nothing around */
4865                         so = NULL;
4866                 if (so) {
4867                         /* Wake any reader/writers */
4868                         sctp_sorwakeup(inp, so);
4869                         sctp_sowwakeup(inp, so);
4870                 }
4871 #ifdef SCTP_LOG_CLOSING
4872                 sctp_log_closing(inp, stcb, 9);
4873 #endif
4874                 /* no asoc destroyed */
4875                 return (0);
4876         }
4877 #ifdef SCTP_LOG_CLOSING
4878         sctp_log_closing(inp, stcb, 10);
4879 #endif
4880         /*
4881          * When I reach here, no others want to kill the assoc yet.. and I
4882          * own the lock. Now its possible an abort comes in when I do the
4883          * lock exchange below to grab all the locks to do the final take
4884          * out. to prevent this we increment the count, which will start a
4885          * timer and blow out above thus assuring us that we hold exclusive
4886          * killing of the asoc. Note that after getting back the TCB lock we
4887          * will go ahead and increment the counter back up and stop any
4888          * timer a passing stranger may have started :-S
4889          */
4890         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4891                 atomic_add_int(&stcb->asoc.refcnt, 1);
4892
4893                 SCTP_TCB_UNLOCK(stcb);
4894                 SCTP_INP_INFO_WLOCK();
4895                 SCTP_INP_WLOCK(inp);
4896                 SCTP_TCB_LOCK(stcb);
4897         }
4898         /* Double check the GONE flag */
4899         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4900             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4901                 /* nothing around */
4902                 so = NULL;
4903
4904         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4905             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4906                 /*
4907                  * For TCP type we need special handling when we are
4908                  * connected. We also include the peel'ed off ones to.
4909                  */
4910                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4911                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4912                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4913                         if (so) {
4914                                 SOCK_LOCK(so);
4915                                 if (so->so_rcv.sb_cc == 0) {
4916                                         so->so_state &= ~(SS_ISCONNECTING |
4917                                             SS_ISDISCONNECTING |
4918                                             SS_ISCONFIRMING |
4919                                             SS_ISCONNECTED);
4920                                 }
4921                                 socantrcvmore_locked(so);
4922                                 sctp_sowwakeup(inp, so);
4923                                 sctp_sorwakeup(inp, so);
4924                                 SCTP_SOWAKEUP(so);
4925                         }
4926                 }
4927         }
4928         /*
4929          * Make it invalid too, that way if its about to run it will abort
4930          * and return.
4931          */
4932         /* re-increment the lock */
4933         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4934                 atomic_add_int(&stcb->asoc.refcnt, -1);
4935         }
4936         if (stcb->asoc.refcnt) {
4937                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4938                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4939                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4940                         SCTP_INP_INFO_WUNLOCK();
4941                         SCTP_INP_WUNLOCK(inp);
4942                 }
4943                 SCTP_TCB_UNLOCK(stcb);
4944                 return (0);
4945         }
4946         asoc->state = 0;
4947         if (inp->sctp_tcbhash) {
4948                 LIST_REMOVE(stcb, sctp_tcbhash);
4949         }
4950         if (stcb->asoc.in_asocid_hash) {
4951                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4952         }
4953         /* Now lets remove it from the list of ALL associations in the EP */
4954         LIST_REMOVE(stcb, sctp_tcblist);
4955         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4956                 SCTP_INP_INCR_REF(inp);
4957                 SCTP_INP_WUNLOCK(inp);
4958         }
4959         /* pull from vtag hash */
4960         LIST_REMOVE(stcb, sctp_asocs);
4961         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4962             inp->sctp_lport, stcb->rport);
4963
4964         /*
4965          * Now restop the timers to be sure this is paranoia at is finest!
4966          */
4967         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4968         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4969         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4970         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4971         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4972         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4973         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4974         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4975                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4976                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4977                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4978         }
4979
4980         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4981         /*
4982          * The chunk lists and such SHOULD be empty but we check them just
4983          * in case.
4984          */
4985         /* anything on the wheel needs to be removed */
4986         for (i = 0; i < asoc->streamoutcnt; i++) {
4987                 struct sctp_stream_out *outs;
4988
4989                 outs = &asoc->strmout[i];
4990                 /* now clean up any chunks here */
4991                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4992                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4993                         sctp_free_spbufspace(stcb, asoc, sp);
4994                         if (sp->data) {
4995                                 if (so) {
4996                                         /* Still an open socket - report */
4997                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4998                                             0, (void *)sp, SCTP_SO_LOCKED);
4999                                 }
5000                                 if (sp->data) {
5001                                         sctp_m_freem(sp->data);
5002                                         sp->data = NULL;
5003                                         sp->tail_mbuf = NULL;
5004                                         sp->length = 0;
5005                                 }
5006                         }
5007                         if (sp->net) {
5008                                 sctp_free_remote_addr(sp->net);
5009                                 sp->net = NULL;
5010                         }
5011                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
5012                 }
5013         }
5014         /* sa_ignore FREED_MEMORY */
5015         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
5016                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
5017                 SCTP_FREE(strrst, SCTP_M_STRESET);
5018         }
5019         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
5020                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
5021                 if (sq->data) {
5022                         sctp_m_freem(sq->data);
5023                         sq->data = NULL;
5024                 }
5025                 sctp_free_remote_addr(sq->whoFrom);
5026                 sq->whoFrom = NULL;
5027                 sq->stcb = NULL;
5028                 /* Free the ctl entry */
5029                 sctp_free_a_readq(stcb, sq);
5030                 /* sa_ignore FREED_MEMORY */
5031         }
5032         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
5033                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
5034                 if (chk->data) {
5035                         sctp_m_freem(chk->data);
5036                         chk->data = NULL;
5037                 }
5038                 if (chk->holds_key_ref)
5039                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5040                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5041                 SCTP_DECR_CHK_COUNT();
5042                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
5043                 asoc->free_chunk_cnt--;
5044                 /* sa_ignore FREED_MEMORY */
5045         }
5046         /* pending send queue SHOULD be empty */
5047         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
5048                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5049                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5050 #ifdef INVARIANTS
5051                 } else {
5052                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5053 #endif
5054                 }
5055                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
5056                 if (chk->data) {
5057                         if (so) {
5058                                 /* Still a socket? */
5059                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
5060                                     0, chk, SCTP_SO_LOCKED);
5061                         }
5062                         if (chk->data) {
5063                                 sctp_m_freem(chk->data);
5064                                 chk->data = NULL;
5065                         }
5066                 }
5067                 if (chk->holds_key_ref)
5068                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5069                 if (chk->whoTo) {
5070                         sctp_free_remote_addr(chk->whoTo);
5071                         chk->whoTo = NULL;
5072                 }
5073                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5074                 SCTP_DECR_CHK_COUNT();
5075                 /* sa_ignore FREED_MEMORY */
5076         }
5077         /* sent queue SHOULD be empty */
5078         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5079                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5080                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5081                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5082 #ifdef INVARIANTS
5083                         } else {
5084                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5085 #endif
5086                         }
5087                 }
5088                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5089                 if (chk->data) {
5090                         if (so) {
5091                                 /* Still a socket? */
5092                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5093                                     0, chk, SCTP_SO_LOCKED);
5094                         }
5095                         if (chk->data) {
5096                                 sctp_m_freem(chk->data);
5097                                 chk->data = NULL;
5098                         }
5099                 }
5100                 if (chk->holds_key_ref)
5101                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5102                 sctp_free_remote_addr(chk->whoTo);
5103                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5104                 SCTP_DECR_CHK_COUNT();
5105                 /* sa_ignore FREED_MEMORY */
5106         }
5107 #ifdef INVARIANTS
5108         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5109                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5110                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5111                 }
5112         }
5113 #endif
5114         /* control queue MAY not be empty */
5115         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5116                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5117                 if (chk->data) {
5118                         sctp_m_freem(chk->data);
5119                         chk->data = NULL;
5120                 }
5121                 if (chk->holds_key_ref)
5122                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5123                 sctp_free_remote_addr(chk->whoTo);
5124                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5125                 SCTP_DECR_CHK_COUNT();
5126                 /* sa_ignore FREED_MEMORY */
5127         }
5128         /* ASCONF queue MAY not be empty */
5129         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5130                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5131                 if (chk->data) {
5132                         sctp_m_freem(chk->data);
5133                         chk->data = NULL;
5134                 }
5135                 if (chk->holds_key_ref)
5136                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5137                 sctp_free_remote_addr(chk->whoTo);
5138                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5139                 SCTP_DECR_CHK_COUNT();
5140                 /* sa_ignore FREED_MEMORY */
5141         }
5142         if (asoc->mapping_array) {
5143                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5144                 asoc->mapping_array = NULL;
5145         }
5146         if (asoc->nr_mapping_array) {
5147                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5148                 asoc->nr_mapping_array = NULL;
5149         }
5150         /* the stream outs */
5151         if (asoc->strmout) {
5152                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5153                 asoc->strmout = NULL;
5154         }
5155         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5156         if (asoc->strmin) {
5157                 for (i = 0; i < asoc->streamincnt; i++) {
5158                         sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue);
5159                         sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue);
5160                 }
5161                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5162                 asoc->strmin = NULL;
5163         }
5164         asoc->streamincnt = 0;
5165         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5166 #ifdef INVARIANTS
5167                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5168                         panic("no net's left alloc'ed, or list points to itself");
5169                 }
5170 #endif
5171                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5172                 sctp_free_remote_addr(net);
5173         }
5174         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5175                 /* sa_ignore FREED_MEMORY */
5176                 sctp_remove_laddr(laddr);
5177         }
5178
5179         /* pending asconf (address) parameters */
5180         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5181                 /* sa_ignore FREED_MEMORY */
5182                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5183                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5184         }
5185         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5186                 /* sa_ignore FREED_MEMORY */
5187                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5188                 if (aack->data != NULL) {
5189                         sctp_m_freem(aack->data);
5190                 }
5191                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5192         }
5193         /* clean up auth stuff */
5194         if (asoc->local_hmacs)
5195                 sctp_free_hmaclist(asoc->local_hmacs);
5196         if (asoc->peer_hmacs)
5197                 sctp_free_hmaclist(asoc->peer_hmacs);
5198
5199         if (asoc->local_auth_chunks)
5200                 sctp_free_chunklist(asoc->local_auth_chunks);
5201         if (asoc->peer_auth_chunks)
5202                 sctp_free_chunklist(asoc->peer_auth_chunks);
5203
5204         sctp_free_authinfo(&asoc->authinfo);
5205
5206         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5207                 LIST_REMOVE(shared_key, next);
5208                 sctp_free_sharedkey(shared_key);
5209                 /* sa_ignore FREED_MEMORY */
5210         }
5211
5212         /* Insert new items here :> */
5213
5214         /* Get rid of LOCK */
5215         SCTP_TCB_UNLOCK(stcb);
5216         SCTP_TCB_LOCK_DESTROY(stcb);
5217         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5218         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5219                 SCTP_INP_INFO_WUNLOCK();
5220                 SCTP_INP_RLOCK(inp);
5221         }
5222 #ifdef SCTP_TRACK_FREED_ASOCS
5223         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5224                 /* now clean up the tasoc itself */
5225                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5226                 SCTP_DECR_ASOC_COUNT();
5227         } else {
5228                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5229         }
5230 #else
5231         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5232         SCTP_DECR_ASOC_COUNT();
5233 #endif
5234         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5235                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5236                         /*
5237                          * If its NOT the inp_free calling us AND sctp_close
5238                          * as been called, we call back...
5239                          */
5240                         SCTP_INP_RUNLOCK(inp);
5241                         /*
5242                          * This will start the kill timer (if we are the
5243                          * last one) since we hold an increment yet. But
5244                          * this is the only safe way to do this since
5245                          * otherwise if the socket closes at the same time
5246                          * we are here we might collide in the cleanup.
5247                          */
5248                         sctp_inpcb_free(inp,
5249                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5250                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5251                         SCTP_INP_DECR_REF(inp);
5252                         goto out_of;
5253                 } else {
5254                         /* The socket is still open. */
5255                         SCTP_INP_DECR_REF(inp);
5256                 }
5257         }
5258         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5259                 SCTP_INP_RUNLOCK(inp);
5260         }
5261 out_of:
5262         /* destroyed the asoc */
5263 #ifdef SCTP_LOG_CLOSING
5264         sctp_log_closing(inp, NULL, 11);
5265 #endif
5266         return (1);
5267 }
5268
5269
5270
5271 /*
5272  * determine if a destination is "reachable" based upon the addresses bound
5273  * to the current endpoint (e.g. only v4 or v6 currently bound)
5274  */
5275 /*
5276  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5277  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5278  * types bound as its endpoint
5279  */
5280 int
5281 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5282 {
5283         struct sctp_inpcb *inp;
5284         int answer;
5285
5286         /*
5287          * No locks here, the TCB, in all cases is already locked and an
5288          * assoc is up. There is either a INP lock by the caller applied (in
5289          * asconf case when deleting an address) or NOT in the HB case,
5290          * however if HB then the INP increment is up and the INP will not
5291          * be removed (on top of the fact that we have a TCB lock). So we
5292          * only want to read the sctp_flags, which is either bound-all or
5293          * not.. no protection needed since once an assoc is up you can't be
5294          * changing your binding.
5295          */
5296         inp = stcb->sctp_ep;
5297         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5298                 /* if bound all, destination is not restricted */
5299                 /*
5300                  * RRS: Question during lock work: Is this correct? If you
5301                  * are bound-all you still might need to obey the V4--V6
5302                  * flags??? IMO this bound-all stuff needs to be removed!
5303                  */
5304                 return (1);
5305         }
5306         /* NOTE: all "scope" checks are done when local addresses are added */
5307         switch (destaddr->sa_family) {
5308 #ifdef INET6
5309         case AF_INET6:
5310                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5311                 break;
5312 #endif
5313 #ifdef INET
5314         case AF_INET:
5315                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5316                 break;
5317 #endif
5318         default:
5319                 /* invalid family, so it's unreachable */
5320                 answer = 0;
5321                 break;
5322         }
5323         return (answer);
5324 }
5325
5326 /*
5327  * update the inp_vflags on an endpoint
5328  */
5329 static void
5330 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5331 {
5332         struct sctp_laddr *laddr;
5333
5334         /* first clear the flag */
5335         inp->ip_inp.inp.inp_vflag = 0;
5336         /* set the flag based on addresses on the ep list */
5337         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5338                 if (laddr->ifa == NULL) {
5339                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5340                             __func__);
5341                         continue;
5342                 }
5343                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5344                         continue;
5345                 }
5346                 switch (laddr->ifa->address.sa.sa_family) {
5347 #ifdef INET6
5348                 case AF_INET6:
5349                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5350                         break;
5351 #endif
5352 #ifdef INET
5353                 case AF_INET:
5354                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5355                         break;
5356 #endif
5357                 default:
5358                         break;
5359                 }
5360         }
5361 }
5362
5363 /*
5364  * Add the address to the endpoint local address list There is nothing to be
5365  * done if we are bound to all addresses
5366  */
5367 void
5368 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5369 {
5370         struct sctp_laddr *laddr;
5371         struct sctp_tcb *stcb;
5372         int fnd, error = 0;
5373
5374         fnd = 0;
5375
5376         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5377                 /* You are already bound to all. You have it already */
5378                 return;
5379         }
5380 #ifdef INET6
5381         if (ifa->address.sa.sa_family == AF_INET6) {
5382                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5383                         /* Can't bind a non-useable addr. */
5384                         return;
5385                 }
5386         }
5387 #endif
5388         /* first, is it already present? */
5389         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5390                 if (laddr->ifa == ifa) {
5391                         fnd = 1;
5392                         break;
5393                 }
5394         }
5395
5396         if (fnd == 0) {
5397                 /* Not in the ep list */
5398                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5399                 if (error != 0)
5400                         return;
5401                 inp->laddr_count++;
5402                 /* update inp_vflag flags */
5403                 switch (ifa->address.sa.sa_family) {
5404 #ifdef INET6
5405                 case AF_INET6:
5406                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5407                         break;
5408 #endif
5409 #ifdef INET
5410                 case AF_INET:
5411                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5412                         break;
5413 #endif
5414                 default:
5415                         break;
5416                 }
5417                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5418                         sctp_add_local_addr_restricted(stcb, ifa);
5419                 }
5420         }
5421         return;
5422 }
5423
5424
5425 /*
5426  * select a new (hopefully reachable) destination net (should only be used
5427  * when we deleted an ep addr that is the only usable source address to reach
5428  * the destination net)
5429  */
5430 static void
5431 sctp_select_primary_destination(struct sctp_tcb *stcb)
5432 {
5433         struct sctp_nets *net;
5434
5435         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5436                 /* for now, we'll just pick the first reachable one we find */
5437                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5438                         continue;
5439                 if (sctp_destination_is_reachable(stcb,
5440                     (struct sockaddr *)&net->ro._l_addr)) {
5441                         /* found a reachable destination */
5442                         stcb->asoc.primary_destination = net;
5443                 }
5444         }
5445         /* I can't there from here! ...we're gonna die shortly... */
5446 }
5447
5448
5449 /*
5450  * Delete the address from the endpoint local address list. There is nothing
5451  * to be done if we are bound to all addresses
5452  */
5453 void
5454 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5455 {
5456         struct sctp_laddr *laddr;
5457         int fnd;
5458
5459         fnd = 0;
5460         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5461                 /* You are already bound to all. You have it already */
5462                 return;
5463         }
5464         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5465                 if (laddr->ifa == ifa) {
5466                         fnd = 1;
5467                         break;
5468                 }
5469         }
5470         if (fnd && (inp->laddr_count < 2)) {
5471                 /* can't delete unless there are at LEAST 2 addresses */
5472                 return;
5473         }
5474         if (fnd) {
5475                 /*
5476                  * clean up any use of this address go through our
5477                  * associations and clear any last_used_address that match
5478                  * this one for each assoc, see if a new primary_destination
5479                  * is needed
5480                  */
5481                 struct sctp_tcb *stcb;
5482
5483                 /* clean up "next_addr_touse" */
5484                 if (inp->next_addr_touse == laddr)
5485                         /* delete this address */
5486                         inp->next_addr_touse = NULL;
5487
5488                 /* clean up "last_used_address" */
5489                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5490                         struct sctp_nets *net;
5491
5492                         SCTP_TCB_LOCK(stcb);
5493                         if (stcb->asoc.last_used_address == laddr)
5494                                 /* delete this address */
5495                                 stcb->asoc.last_used_address = NULL;
5496                         /*
5497                          * Now spin through all the nets and purge any ref
5498                          * to laddr
5499                          */
5500                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5501                                 if (net->ro._s_addr == laddr->ifa) {
5502                                         /* Yep, purge src address selected */
5503                                         sctp_rtentry_t *rt;
5504
5505                                         /* delete this address if cached */
5506                                         rt = net->ro.ro_rt;
5507                                         if (rt != NULL) {
5508                                                 RTFREE(rt);
5509                                                 net->ro.ro_rt = NULL;
5510                                         }
5511                                         sctp_free_ifa(net->ro._s_addr);
5512                                         net->ro._s_addr = NULL;
5513                                         net->src_addr_selected = 0;
5514                                 }
5515                         }
5516                         SCTP_TCB_UNLOCK(stcb);
5517                 }               /* for each tcb */
5518                 /* remove it from the ep list */
5519                 sctp_remove_laddr(laddr);
5520                 inp->laddr_count--;
5521                 /* update inp_vflag flags */
5522                 sctp_update_ep_vflag(inp);
5523         }
5524         return;
5525 }
5526
5527 /*
5528  * Add the address to the TCB local address restricted list.
5529  * This is a "pending" address list (eg. addresses waiting for an
5530  * ASCONF-ACK response) and cannot be used as a valid source address.
5531  */
5532 void
5533 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5534 {
5535         struct sctp_laddr *laddr;
5536         struct sctpladdr *list;
5537
5538         /*
5539          * Assumes TCB is locked.. and possibly the INP. May need to
5540          * confirm/fix that if we need it and is not the case.
5541          */
5542         list = &stcb->asoc.sctp_restricted_addrs;
5543
5544 #ifdef INET6
5545         if (ifa->address.sa.sa_family == AF_INET6) {
5546                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5547                         /* Can't bind a non-existent addr. */
5548                         return;
5549                 }
5550         }
5551 #endif
5552         /* does the address already exist? */
5553         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5554                 if (laddr->ifa == ifa) {
5555                         return;
5556                 }
5557         }
5558
5559         /* add to the list */
5560         (void)sctp_insert_laddr(list, ifa, 0);
5561         return;
5562 }
5563
5564 /*
5565  * Remove a local address from the TCB local address restricted list
5566  */
5567 void
5568 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5569 {
5570         struct sctp_inpcb *inp;
5571         struct sctp_laddr *laddr;
5572
5573         /*
5574          * This is called by asconf work. It is assumed that a) The TCB is
5575          * locked and b) The INP is locked. This is true in as much as I can
5576          * trace through the entry asconf code where I did these locks.
5577          * Again, the ASCONF code is a bit different in that it does lock
5578          * the INP during its work often times. This must be since we don't
5579          * want other proc's looking up things while what they are looking
5580          * up is changing :-D
5581          */
5582
5583         inp = stcb->sctp_ep;
5584         /* if subset bound and don't allow ASCONF's, can't delete last */
5585         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5586             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5587                 if (stcb->sctp_ep->laddr_count < 2) {
5588                         /* can't delete last address */
5589                         return;
5590                 }
5591         }
5592         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5593                 /* remove the address if it exists */
5594                 if (laddr->ifa == NULL)
5595                         continue;
5596                 if (laddr->ifa == ifa) {
5597                         sctp_remove_laddr(laddr);
5598                         return;
5599                 }
5600         }
5601
5602         /* address not found! */
5603         return;
5604 }
5605
5606 /*
5607  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5608  */
5609 /* sysctl */
5610 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5611 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5612
5613
5614
5615 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5616 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5617 int *sctp_cpuarry = NULL;
5618 void
5619 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5620 {
5621         /* Queue a packet to a processor for the specified core */
5622         struct sctp_mcore_queue *qent;
5623         struct sctp_mcore_ctrl *wkq;
5624         int need_wake = 0;
5625
5626         if (sctp_mcore_workers == NULL) {
5627                 /* Something went way bad during setup */
5628                 sctp_input_with_port(m, off, 0);
5629                 return;
5630         }
5631         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5632             (sizeof(struct sctp_mcore_queue)),
5633             SCTP_M_MCORE);
5634         if (qent == NULL) {
5635                 /* This is trouble  */
5636                 sctp_input_with_port(m, off, 0);
5637                 return;
5638         }
5639         qent->vn = curvnet;
5640         qent->m = m;
5641         qent->off = off;
5642         qent->v6 = 0;
5643         wkq = &sctp_mcore_workers[cpu_to_use];
5644         SCTP_MCORE_QLOCK(wkq);
5645
5646         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5647         if (wkq->running == 0) {
5648                 need_wake = 1;
5649         }
5650         SCTP_MCORE_QUNLOCK(wkq);
5651         if (need_wake) {
5652                 wakeup(&wkq->running);
5653         }
5654 }
5655
5656 static void
5657 sctp_mcore_thread(void *arg)
5658 {
5659
5660         struct sctp_mcore_ctrl *wkq;
5661         struct sctp_mcore_queue *qent;
5662
5663         wkq = (struct sctp_mcore_ctrl *)arg;
5664         struct mbuf *m;
5665         int off, v6;
5666
5667         /* Wait for first tickle */
5668         SCTP_MCORE_LOCK(wkq);
5669         wkq->running = 0;
5670         msleep(&wkq->running,
5671             &wkq->core_mtx,
5672             0, "wait for pkt", 0);
5673         SCTP_MCORE_UNLOCK(wkq);
5674
5675         /* Bind to our cpu */
5676         thread_lock(curthread);
5677         sched_bind(curthread, wkq->cpuid);
5678         thread_unlock(curthread);
5679
5680         /* Now lets start working */
5681         SCTP_MCORE_LOCK(wkq);
5682         /* Now grab lock and go */
5683         for (;;) {
5684                 SCTP_MCORE_QLOCK(wkq);
5685 skip_sleep:
5686                 wkq->running = 1;
5687                 qent = TAILQ_FIRST(&wkq->que);
5688                 if (qent) {
5689                         TAILQ_REMOVE(&wkq->que, qent, next);
5690                         SCTP_MCORE_QUNLOCK(wkq);
5691                         CURVNET_SET(qent->vn);
5692                         m = qent->m;
5693                         off = qent->off;
5694                         v6 = qent->v6;
5695                         SCTP_FREE(qent, SCTP_M_MCORE);
5696                         if (v6 == 0) {
5697                                 sctp_input_with_port(m, off, 0);
5698                         } else {
5699                                 SCTP_PRINTF("V6 not yet supported\n");
5700                                 sctp_m_freem(m);
5701                         }
5702                         CURVNET_RESTORE();
5703                         SCTP_MCORE_QLOCK(wkq);
5704                 }
5705                 wkq->running = 0;
5706                 if (!TAILQ_EMPTY(&wkq->que)) {
5707                         goto skip_sleep;
5708                 }
5709                 SCTP_MCORE_QUNLOCK(wkq);
5710                 msleep(&wkq->running,
5711                     &wkq->core_mtx,
5712                     0, "wait for pkt", 0);
5713         }
5714 }
5715
5716 static void
5717 sctp_startup_mcore_threads(void)
5718 {
5719         int i, cpu;
5720
5721         if (mp_ncpus == 1)
5722                 return;
5723
5724         if (sctp_mcore_workers != NULL) {
5725                 /*
5726                  * Already been here in some previous vnet?
5727                  */
5728                 return;
5729         }
5730         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5731             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5732             SCTP_M_MCORE);
5733         if (sctp_mcore_workers == NULL) {
5734                 /* TSNH I hope */
5735                 return;
5736         }
5737         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5738             sizeof(struct sctp_mcore_ctrl)));
5739         /* Init the structures */
5740         for (i = 0; i <= mp_maxid; i++) {
5741                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5742                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5743                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5744                 sctp_mcore_workers[i].cpuid = i;
5745         }
5746         if (sctp_cpuarry == NULL) {
5747                 SCTP_MALLOC(sctp_cpuarry, int *,
5748                     (mp_ncpus * sizeof(int)),
5749                     SCTP_M_MCORE);
5750                 i = 0;
5751                 CPU_FOREACH(cpu) {
5752                         sctp_cpuarry[i] = cpu;
5753                         i++;
5754                 }
5755         }
5756         /* Now start them all */
5757         CPU_FOREACH(cpu) {
5758                 (void)kproc_create(sctp_mcore_thread,
5759                     (void *)&sctp_mcore_workers[cpu],
5760                     &sctp_mcore_workers[cpu].thread_proc,
5761                     RFPROC,
5762                     SCTP_KTHREAD_PAGES,
5763                     SCTP_MCORE_NAME);
5764
5765         }
5766 }
5767
5768 #endif
5769
5770 void
5771 sctp_pcb_init()
5772 {
5773         /*
5774          * SCTP initialization for the PCB structures should be called by
5775          * the sctp_init() funciton.
5776          */
5777         int i;
5778         struct timeval tv;
5779
5780         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5781                 /* error I was called twice */
5782                 return;
5783         }
5784         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5785
5786 #if defined(SCTP_LOCAL_TRACE_BUF)
5787         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5788 #endif
5789 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5790         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5791             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5792             SCTP_M_MCORE);
5793 #endif
5794         (void)SCTP_GETTIME_TIMEVAL(&tv);
5795 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5796         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5797         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5798         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5799 #else
5800         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5801         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5802         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5803 #endif
5804         /* init the empty list of (All) Endpoints */
5805         LIST_INIT(&SCTP_BASE_INFO(listhead));
5806
5807
5808         /* init the hash table of endpoints */
5809         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5810         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5811         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5812         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5813             &SCTP_BASE_INFO(hashasocmark));
5814         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5815             &SCTP_BASE_INFO(hashmark));
5816         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5817             &SCTP_BASE_INFO(hashtcpmark));
5818         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5819
5820
5821         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5822             &SCTP_BASE_INFO(hashvrfmark));
5823
5824         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5825             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5826         /* init the zones */
5827         /*
5828          * FIX ME: Should check for NULL returns, but if it does fail we are
5829          * doomed to panic anyways... add later maybe.
5830          */
5831         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5832             sizeof(struct sctp_inpcb), maxsockets);
5833
5834         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5835             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5836
5837         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5838             sizeof(struct sctp_laddr),
5839             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5840
5841         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5842             sizeof(struct sctp_nets),
5843             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5844
5845         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5846             sizeof(struct sctp_tmit_chunk),
5847             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5848
5849         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5850             sizeof(struct sctp_queued_to_read),
5851             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5852
5853         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5854             sizeof(struct sctp_stream_queue_pending),
5855             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5856
5857         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5858             sizeof(struct sctp_asconf),
5859             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5860
5861         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5862             sizeof(struct sctp_asconf_ack),
5863             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5864
5865
5866         /* Master Lock INIT for info structure */
5867         SCTP_INP_INFO_LOCK_INIT();
5868         SCTP_STATLOG_INIT_LOCK();
5869
5870         SCTP_IPI_COUNT_INIT();
5871         SCTP_IPI_ADDR_INIT();
5872 #ifdef SCTP_PACKET_LOGGING
5873         SCTP_IP_PKTLOG_INIT();
5874 #endif
5875         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5876
5877         SCTP_WQ_ADDR_INIT();
5878         /* not sure if we need all the counts */
5879         SCTP_BASE_INFO(ipi_count_ep) = 0;
5880         /* assoc/tcb zone info */
5881         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5882         /* local addrlist zone info */
5883         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5884         /* remote addrlist zone info */
5885         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5886         /* chunk info */
5887         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5888
5889         /* socket queue zone info */
5890         SCTP_BASE_INFO(ipi_count_readq) = 0;
5891
5892         /* stream out queue cont */
5893         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5894
5895         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5896         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5897
5898         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5899
5900         /* Init the TIMEWAIT list */
5901         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5902                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5903         }
5904         sctp_startup_iterator();
5905
5906 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5907         sctp_startup_mcore_threads();
5908 #endif
5909
5910         /*
5911          * INIT the default VRF which for BSD is the only one, other O/S's
5912          * may have more. But initially they must start with one and then
5913          * add the VRF's as addresses are added.
5914          */
5915         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5916 }
5917
5918 /*
5919  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5920  */
5921 void
5922 sctp_pcb_finish(void)
5923 {
5924         struct sctp_vrflist *vrf_bucket;
5925         struct sctp_vrf *vrf, *nvrf;
5926         struct sctp_ifn *ifn, *nifn;
5927         struct sctp_ifa *ifa, *nifa;
5928         struct sctpvtaghead *chain;
5929         struct sctp_tagblock *twait_block, *prev_twait_block;
5930         struct sctp_laddr *wi, *nwi;
5931         int i;
5932         struct sctp_iterator *it, *nit;
5933
5934         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
5935                 SCTP_PRINTF("%s: race condition on teardown.\n", __func__);
5936                 return;
5937         }
5938         SCTP_BASE_VAR(sctp_pcb_initialized) = 0;
5939         /*
5940          * In FreeBSD the iterator thread never exits but we do clean up.
5941          * The only way FreeBSD reaches here is if we have VRF's but we
5942          * still add the ifdef to make it compile on old versions.
5943          */
5944 retry:
5945         SCTP_IPI_ITERATOR_WQ_LOCK();
5946         /*
5947          * sctp_iterator_worker() might be working on an it entry without
5948          * holding the lock.  We won't find it on the list either and
5949          * continue and free/destroy it.  While holding the lock, spin, to
5950          * avoid the race condition as sctp_iterator_worker() will have to
5951          * wait to re-aquire the lock.
5952          */
5953         if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) {
5954                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
5955                 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. "
5956                     "cur_it=%p\n", __func__, sctp_it_ctl.cur_it);
5957                 DELAY(10);
5958                 goto retry;
5959         }
5960         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5961                 if (it->vn != curvnet) {
5962                         continue;
5963                 }
5964                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5965                 if (it->function_atend != NULL) {
5966                         (*it->function_atend) (it->pointer, it->val);
5967                 }
5968                 SCTP_FREE(it, SCTP_M_ITER);
5969         }
5970         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5971         SCTP_ITERATOR_LOCK();
5972         if ((sctp_it_ctl.cur_it) &&
5973             (sctp_it_ctl.cur_it->vn == curvnet)) {
5974                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5975         }
5976         SCTP_ITERATOR_UNLOCK();
5977         SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer));
5978         SCTP_WQ_ADDR_LOCK();
5979         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5980                 LIST_REMOVE(wi, sctp_nxt_addr);
5981                 SCTP_DECR_LADDR_COUNT();
5982                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5983                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5984                 }
5985                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5986         }
5987         SCTP_WQ_ADDR_UNLOCK();
5988
5989         /*
5990          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5991          * destroyed first).
5992          */
5993         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5994         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5995                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5996                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5997                                 /* free the ifa */
5998                                 LIST_REMOVE(ifa, next_bucket);
5999                                 LIST_REMOVE(ifa, next_ifa);
6000                                 SCTP_FREE(ifa, SCTP_M_IFA);
6001                         }
6002                         /* free the ifn */
6003                         LIST_REMOVE(ifn, next_bucket);
6004                         LIST_REMOVE(ifn, next_ifn);
6005                         SCTP_FREE(ifn, SCTP_M_IFN);
6006                 }
6007                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
6008                 /* free the vrf */
6009                 LIST_REMOVE(vrf, next_vrf);
6010                 SCTP_FREE(vrf, SCTP_M_VRF);
6011         }
6012         /* free the vrf hashes */
6013         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
6014         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
6015
6016         /*
6017          * free the TIMEWAIT list elements malloc'd in the function
6018          * sctp_add_vtag_to_timewait()...
6019          */
6020         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
6021                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
6022                 if (!LIST_EMPTY(chain)) {
6023                         prev_twait_block = NULL;
6024                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6025                                 if (prev_twait_block) {
6026                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6027                                 }
6028                                 prev_twait_block = twait_block;
6029                         }
6030                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6031                 }
6032         }
6033
6034         /* free the locks and mutexes */
6035 #ifdef SCTP_PACKET_LOGGING
6036         SCTP_IP_PKTLOG_DESTROY();
6037 #endif
6038         SCTP_IPI_ADDR_DESTROY();
6039         SCTP_STATLOG_DESTROY();
6040         SCTP_INP_INFO_LOCK_DESTROY();
6041
6042         SCTP_WQ_ADDR_DESTROY();
6043
6044         /* Get rid of other stuff too. */
6045         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6046                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6047         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6048                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6049         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6050                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6051
6052         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6053         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6054         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6055         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6056         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6057         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6058         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6059         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6060         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6061 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6062         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6063 #endif
6064 }
6065
6066
6067 int
6068 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6069     int offset, int limit,
6070     struct sockaddr *src, struct sockaddr *dst,
6071     struct sockaddr *altsa)
6072 {
6073         /*
6074          * grub through the INIT pulling addresses and loading them to the
6075          * nets structure in the asoc. The from address in the mbuf should
6076          * also be loaded (if it is not already). This routine can be called
6077          * with either INIT or INIT-ACK's as long as the m points to the IP
6078          * packet and the offset points to the beginning of the parameters.
6079          */
6080         struct sctp_inpcb *inp;
6081         struct sctp_nets *net, *nnet, *net_tmp;
6082         struct sctp_paramhdr *phdr, parm_buf;
6083         struct sctp_tcb *stcb_tmp;
6084         uint16_t ptype, plen;
6085         struct sockaddr *sa;
6086         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6087         struct sctp_auth_random *p_random = NULL;
6088         uint16_t random_len = 0;
6089         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6090         struct sctp_auth_hmac_algo *hmacs = NULL;
6091         uint16_t hmacs_len = 0;
6092         uint8_t saw_asconf = 0;
6093         uint8_t saw_asconf_ack = 0;
6094         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6095         struct sctp_auth_chunk_list *chunks = NULL;
6096         uint16_t num_chunks = 0;
6097         sctp_key_t *new_key;
6098         uint32_t keylen;
6099         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6100         uint8_t peer_supports_ecn;
6101         uint8_t peer_supports_prsctp;
6102         uint8_t peer_supports_auth;
6103         uint8_t peer_supports_asconf;
6104         uint8_t peer_supports_asconf_ack;
6105         uint8_t peer_supports_reconfig;
6106         uint8_t peer_supports_nrsack;
6107         uint8_t peer_supports_pktdrop;
6108         uint8_t peer_supports_idata;
6109
6110 #ifdef INET
6111         struct sockaddr_in sin;
6112
6113 #endif
6114 #ifdef INET6
6115         struct sockaddr_in6 sin6;
6116
6117 #endif
6118
6119         /* First get the destination address setup too. */
6120 #ifdef INET
6121         memset(&sin, 0, sizeof(sin));
6122         sin.sin_family = AF_INET;
6123         sin.sin_len = sizeof(sin);
6124         sin.sin_port = stcb->rport;
6125 #endif
6126 #ifdef INET6
6127         memset(&sin6, 0, sizeof(sin6));
6128         sin6.sin6_family = AF_INET6;
6129         sin6.sin6_len = sizeof(struct sockaddr_in6);
6130         sin6.sin6_port = stcb->rport;
6131 #endif
6132         if (altsa) {
6133                 sa = altsa;
6134         } else {
6135                 sa = src;
6136         }
6137         peer_supports_idata = 0;
6138         peer_supports_ecn = 0;
6139         peer_supports_prsctp = 0;
6140         peer_supports_auth = 0;
6141         peer_supports_asconf = 0;
6142         peer_supports_reconfig = 0;
6143         peer_supports_nrsack = 0;
6144         peer_supports_pktdrop = 0;
6145         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6146                 /* mark all addresses that we have currently on the list */
6147                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6148         }
6149         /* does the source address already exist? if so skip it */
6150         inp = stcb->sctp_ep;
6151         atomic_add_int(&stcb->asoc.refcnt, 1);
6152         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6153         atomic_add_int(&stcb->asoc.refcnt, -1);
6154
6155         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6156                 /* we must add the source address */
6157                 /* no scope set here since we have a tcb already. */
6158                 switch (sa->sa_family) {
6159 #ifdef INET
6160                 case AF_INET:
6161                         if (stcb->asoc.scope.ipv4_addr_legal) {
6162                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6163                                         return (-1);
6164                                 }
6165                         }
6166                         break;
6167 #endif
6168 #ifdef INET6
6169                 case AF_INET6:
6170                         if (stcb->asoc.scope.ipv6_addr_legal) {
6171                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6172                                         return (-2);
6173                                 }
6174                         }
6175                         break;
6176 #endif
6177                 default:
6178                         break;
6179                 }
6180         } else {
6181                 if (net_tmp != NULL && stcb_tmp == stcb) {
6182                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6183                 } else if (stcb_tmp != stcb) {
6184                         /* It belongs to another association? */
6185                         if (stcb_tmp)
6186                                 SCTP_TCB_UNLOCK(stcb_tmp);
6187                         return (-3);
6188                 }
6189         }
6190         if (stcb->asoc.state == 0) {
6191                 /* the assoc was freed? */
6192                 return (-4);
6193         }
6194         /* now we must go through each of the params. */
6195         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6196         while (phdr) {
6197                 ptype = ntohs(phdr->param_type);
6198                 plen = ntohs(phdr->param_length);
6199                 /*
6200                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6201                  * (uint32_t)ptype, (int)plen);
6202                  */
6203                 if (offset + plen > limit) {
6204                         break;
6205                 }
6206                 if (plen == 0) {
6207                         break;
6208                 }
6209 #ifdef INET
6210                 if (ptype == SCTP_IPV4_ADDRESS) {
6211                         if (stcb->asoc.scope.ipv4_addr_legal) {
6212                                 struct sctp_ipv4addr_param *p4, p4_buf;
6213
6214                                 /* ok get the v4 address and check/add */
6215                                 phdr = sctp_get_next_param(m, offset,
6216                                     (struct sctp_paramhdr *)&p4_buf,
6217                                     sizeof(p4_buf));
6218                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6219                                     phdr == NULL) {
6220                                         return (-5);
6221                                 }
6222                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6223                                 sin.sin_addr.s_addr = p4->addr;
6224                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6225                                         /* Skip multi-cast addresses */
6226                                         goto next_param;
6227                                 }
6228                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6229                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6230                                         goto next_param;
6231                                 }
6232                                 sa = (struct sockaddr *)&sin;
6233                                 inp = stcb->sctp_ep;
6234                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6235                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6236                                     dst, stcb);
6237                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6238
6239                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6240                                     inp == NULL) {
6241                                         /* we must add the source address */
6242                                         /*
6243                                          * no scope set since we have a tcb
6244                                          * already
6245                                          */
6246
6247                                         /*
6248                                          * we must validate the state again
6249                                          * here
6250                                          */
6251                         add_it_now:
6252                                         if (stcb->asoc.state == 0) {
6253                                                 /* the assoc was freed? */
6254                                                 return (-7);
6255                                         }
6256                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6257                                                 return (-8);
6258                                         }
6259                                 } else if (stcb_tmp == stcb) {
6260                                         if (stcb->asoc.state == 0) {
6261                                                 /* the assoc was freed? */
6262                                                 return (-10);
6263                                         }
6264                                         if (net != NULL) {
6265                                                 /* clear flag */
6266                                                 net->dest_state &=
6267                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6268                                         }
6269                                 } else {
6270                                         /*
6271                                          * strange, address is in another
6272                                          * assoc? straighten out locks.
6273                                          */
6274                                         if (stcb_tmp) {
6275                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6276                                                         struct mbuf *op_err;
6277                                                         char msg[SCTP_DIAG_INFO_LEN];
6278
6279                                                         /*
6280                                                          * in setup state we
6281                                                          * abort this guy
6282                                                          */
6283                                                         snprintf(msg, sizeof(msg),
6284                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6285                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6286                                                             msg);
6287                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6288                                                             stcb_tmp, op_err,
6289                                                             SCTP_SO_NOT_LOCKED);
6290                                                         goto add_it_now;
6291                                                 }
6292                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6293                                         }
6294                                         if (stcb->asoc.state == 0) {
6295                                                 /* the assoc was freed? */
6296                                                 return (-12);
6297                                         }
6298                                         return (-13);
6299                                 }
6300                         }
6301                 } else
6302 #endif
6303 #ifdef INET6
6304                 if (ptype == SCTP_IPV6_ADDRESS) {
6305                         if (stcb->asoc.scope.ipv6_addr_legal) {
6306                                 /* ok get the v6 address and check/add */
6307                                 struct sctp_ipv6addr_param *p6, p6_buf;
6308
6309                                 phdr = sctp_get_next_param(m, offset,
6310                                     (struct sctp_paramhdr *)&p6_buf,
6311                                     sizeof(p6_buf));
6312                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6313                                     phdr == NULL) {
6314                                         return (-14);
6315                                 }
6316                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6317                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6318                                     sizeof(p6->addr));
6319                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6320                                         /* Skip multi-cast addresses */
6321                                         goto next_param;
6322                                 }
6323                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6324                                         /*
6325                                          * Link local make no sense without
6326                                          * scope
6327                                          */
6328                                         goto next_param;
6329                                 }
6330                                 sa = (struct sockaddr *)&sin6;
6331                                 inp = stcb->sctp_ep;
6332                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6333                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6334                                     dst, stcb);
6335                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6336                                 if (stcb_tmp == NULL &&
6337                                     (inp == stcb->sctp_ep || inp == NULL)) {
6338                                         /*
6339                                          * we must validate the state again
6340                                          * here
6341                                          */
6342                         add_it_now6:
6343                                         if (stcb->asoc.state == 0) {
6344                                                 /* the assoc was freed? */
6345                                                 return (-16);
6346                                         }
6347                                         /*
6348                                          * we must add the address, no scope
6349                                          * set
6350                                          */
6351                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6352                                                 return (-17);
6353                                         }
6354                                 } else if (stcb_tmp == stcb) {
6355                                         /*
6356                                          * we must validate the state again
6357                                          * here
6358                                          */
6359                                         if (stcb->asoc.state == 0) {
6360                                                 /* the assoc was freed? */
6361                                                 return (-19);
6362                                         }
6363                                         if (net != NULL) {
6364                                                 /* clear flag */
6365                                                 net->dest_state &=
6366                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6367                                         }
6368                                 } else {
6369                                         /*
6370                                          * strange, address is in another
6371                                          * assoc? straighten out locks.
6372                                          */
6373                                         if (stcb_tmp) {
6374                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6375                                                         struct mbuf *op_err;
6376                                                         char msg[SCTP_DIAG_INFO_LEN];
6377
6378                                                         /*
6379                                                          * in setup state we
6380                                                          * abort this guy
6381                                                          */
6382                                                         snprintf(msg, sizeof(msg),
6383                                                             "%s:%d at %s", __FILE__, __LINE__, __func__);
6384                                                         op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code),
6385                                                             msg);
6386                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6387                                                             stcb_tmp, op_err,
6388                                                             SCTP_SO_NOT_LOCKED);
6389                                                         goto add_it_now6;
6390                                                 }
6391                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6392                                         }
6393                                         if (stcb->asoc.state == 0) {
6394                                                 /* the assoc was freed? */
6395                                                 return (-21);
6396                                         }
6397                                         return (-22);
6398                                 }
6399                         }
6400                 } else
6401 #endif
6402                 if (ptype == SCTP_ECN_CAPABLE) {
6403                         peer_supports_ecn = 1;
6404                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6405                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6406                                 struct sctp_adaptation_layer_indication ai,
6407                                                                 *aip;
6408
6409                                 phdr = sctp_get_next_param(m, offset,
6410                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6411                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6412                                 if (aip) {
6413                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6414                                         stcb->asoc.adaptation_needed = 1;
6415                                 }
6416                         }
6417                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6418                         struct sctp_asconf_addr_param lstore, *fee;
6419                         int lptype;
6420                         struct sockaddr *lsa = NULL;
6421
6422 #ifdef INET
6423                         struct sctp_asconf_addrv4_param *fii;
6424
6425 #endif
6426
6427                         if (stcb->asoc.asconf_supported == 0) {
6428                                 return (-100);
6429                         }
6430                         if (plen > sizeof(lstore)) {
6431                                 return (-23);
6432                         }
6433                         phdr = sctp_get_next_param(m, offset,
6434                             (struct sctp_paramhdr *)&lstore,
6435                             min(plen, sizeof(lstore)));
6436                         if (phdr == NULL) {
6437                                 return (-24);
6438                         }
6439                         fee = (struct sctp_asconf_addr_param *)phdr;
6440                         lptype = ntohs(fee->addrp.ph.param_type);
6441                         switch (lptype) {
6442 #ifdef INET
6443                         case SCTP_IPV4_ADDRESS:
6444                                 if (plen !=
6445                                     sizeof(struct sctp_asconf_addrv4_param)) {
6446                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6447                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6448                                             plen);
6449                                 } else {
6450                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6451                                         sin.sin_addr.s_addr = fii->addrp.addr;
6452                                         lsa = (struct sockaddr *)&sin;
6453                                 }
6454                                 break;
6455 #endif
6456 #ifdef INET6
6457                         case SCTP_IPV6_ADDRESS:
6458                                 if (plen !=
6459                                     sizeof(struct sctp_asconf_addr_param)) {
6460                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6461                                             (int)sizeof(struct sctp_asconf_addr_param),
6462                                             plen);
6463                                 } else {
6464                                         memcpy(sin6.sin6_addr.s6_addr,
6465                                             fee->addrp.addr,
6466                                             sizeof(fee->addrp.addr));
6467                                         lsa = (struct sockaddr *)&sin6;
6468                                 }
6469                                 break;
6470 #endif
6471                         default:
6472                                 break;
6473                         }
6474                         if (lsa) {
6475                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6476                         }
6477                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6478                         stcb->asoc.peer_supports_nat = 1;
6479                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6480                         /* Peer supports pr-sctp */
6481                         peer_supports_prsctp = 1;
6482                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6483                         /* A supported extension chunk */
6484                         struct sctp_supported_chunk_types_param *pr_supported;
6485                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6486                         int num_ent, i;
6487
6488                         phdr = sctp_get_next_param(m, offset,
6489                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6490                         if (phdr == NULL) {
6491                                 return (-25);
6492                         }
6493                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6494                         num_ent = plen - sizeof(struct sctp_paramhdr);
6495                         for (i = 0; i < num_ent; i++) {
6496                                 switch (pr_supported->chunk_types[i]) {
6497                                 case SCTP_ASCONF:
6498                                         peer_supports_asconf = 1;
6499                                         break;
6500                                 case SCTP_ASCONF_ACK:
6501                                         peer_supports_asconf_ack = 1;
6502                                         break;
6503                                 case SCTP_FORWARD_CUM_TSN:
6504                                         peer_supports_prsctp = 1;
6505                                         break;
6506                                 case SCTP_PACKET_DROPPED:
6507                                         peer_supports_pktdrop = 1;
6508                                         break;
6509                                 case SCTP_NR_SELECTIVE_ACK:
6510                                         peer_supports_nrsack = 1;
6511                                         break;
6512                                 case SCTP_STREAM_RESET:
6513                                         peer_supports_reconfig = 1;
6514                                         break;
6515                                 case SCTP_AUTHENTICATION:
6516                                         peer_supports_auth = 1;
6517                                         break;
6518                                 case SCTP_IDATA:
6519                                         peer_supports_idata = 1;
6520                                         break;
6521                                 default:
6522                                         /* one I have not learned yet */
6523                                         break;
6524
6525                                 }
6526                         }
6527                 } else if (ptype == SCTP_RANDOM) {
6528                         if (plen > sizeof(random_store))
6529                                 break;
6530                         if (got_random) {
6531                                 /* already processed a RANDOM */
6532                                 goto next_param;
6533                         }
6534                         phdr = sctp_get_next_param(m, offset,
6535                             (struct sctp_paramhdr *)random_store,
6536                             min(sizeof(random_store), plen));
6537                         if (phdr == NULL)
6538                                 return (-26);
6539                         p_random = (struct sctp_auth_random *)phdr;
6540                         random_len = plen - sizeof(*p_random);
6541                         /* enforce the random length */
6542                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6543                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6544                                 return (-27);
6545                         }
6546                         got_random = 1;
6547                 } else if (ptype == SCTP_HMAC_LIST) {
6548                         uint16_t num_hmacs;
6549                         uint16_t i;
6550
6551                         if (plen > sizeof(hmacs_store))
6552                                 break;
6553                         if (got_hmacs) {
6554                                 /* already processed a HMAC list */
6555                                 goto next_param;
6556                         }
6557                         phdr = sctp_get_next_param(m, offset,
6558                             (struct sctp_paramhdr *)hmacs_store,
6559                             min(plen, sizeof(hmacs_store)));
6560                         if (phdr == NULL)
6561                                 return (-28);
6562                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6563                         hmacs_len = plen - sizeof(*hmacs);
6564                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6565                         /* validate the hmac list */
6566                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6567                                 return (-29);
6568                         }
6569                         if (stcb->asoc.peer_hmacs != NULL)
6570                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6571                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6572                         if (stcb->asoc.peer_hmacs != NULL) {
6573                                 for (i = 0; i < num_hmacs; i++) {
6574                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6575                                             ntohs(hmacs->hmac_ids[i]));
6576                                 }
6577                         }
6578                         got_hmacs = 1;
6579                 } else if (ptype == SCTP_CHUNK_LIST) {
6580                         int i;
6581
6582                         if (plen > sizeof(chunks_store))
6583                                 break;
6584                         if (got_chklist) {
6585                                 /* already processed a Chunks list */
6586                                 goto next_param;
6587                         }
6588                         phdr = sctp_get_next_param(m, offset,
6589                             (struct sctp_paramhdr *)chunks_store,
6590                             min(plen, sizeof(chunks_store)));
6591                         if (phdr == NULL)
6592                                 return (-30);
6593                         chunks = (struct sctp_auth_chunk_list *)phdr;
6594                         num_chunks = plen - sizeof(*chunks);
6595                         if (stcb->asoc.peer_auth_chunks != NULL)
6596                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6597                         else
6598                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6599                         for (i = 0; i < num_chunks; i++) {
6600                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6601                                     stcb->asoc.peer_auth_chunks);
6602                                 /* record asconf/asconf-ack if listed */
6603                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6604                                         saw_asconf = 1;
6605                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6606                                         saw_asconf_ack = 1;
6607
6608                         }
6609                         got_chklist = 1;
6610                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6611                             (ptype == SCTP_STATE_COOKIE) ||
6612                             (ptype == SCTP_UNRECOG_PARAM) ||
6613                             (ptype == SCTP_COOKIE_PRESERVE) ||
6614                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6615                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6616                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6617                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6618                     (ptype == SCTP_SUCCESS_REPORT)) {
6619                          /* don't care */ ;
6620                 } else {
6621                         if ((ptype & 0x8000) == 0x0000) {
6622                                 /*
6623                                  * must stop processing the rest of the
6624                                  * param's. Any report bits were handled
6625                                  * with the call to
6626                                  * sctp_arethere_unrecognized_parameters()
6627                                  * when the INIT or INIT-ACK was first seen.
6628                                  */
6629                                 break;
6630                         }
6631                 }
6632
6633 next_param:
6634                 offset += SCTP_SIZE32(plen);
6635                 if (offset >= limit) {
6636                         break;
6637                 }
6638                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6639                     sizeof(parm_buf));
6640         }
6641         /* Now check to see if we need to purge any addresses */
6642         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6643                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6644                     SCTP_ADDR_NOT_IN_ASSOC) {
6645                         /* This address has been removed from the asoc */
6646                         /* remove and free it */
6647                         stcb->asoc.numnets--;
6648                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6649                         sctp_free_remote_addr(net);
6650                         if (net == stcb->asoc.primary_destination) {
6651                                 stcb->asoc.primary_destination = NULL;
6652                                 sctp_select_primary_destination(stcb);
6653                         }
6654                 }
6655         }
6656         if ((stcb->asoc.ecn_supported == 1) &&
6657             (peer_supports_ecn == 0)) {
6658                 stcb->asoc.ecn_supported = 0;
6659         }
6660         if ((stcb->asoc.prsctp_supported == 1) &&
6661             (peer_supports_prsctp == 0)) {
6662                 stcb->asoc.prsctp_supported = 0;
6663         }
6664         if ((stcb->asoc.auth_supported == 1) &&
6665             ((peer_supports_auth == 0) ||
6666             (got_random == 0) || (got_hmacs == 0))) {
6667                 stcb->asoc.auth_supported = 0;
6668         }
6669         if ((stcb->asoc.asconf_supported == 1) &&
6670             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6671             (stcb->asoc.auth_supported == 0) ||
6672             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6673                 stcb->asoc.asconf_supported = 0;
6674         }
6675         if ((stcb->asoc.reconfig_supported == 1) &&
6676             (peer_supports_reconfig == 0)) {
6677                 stcb->asoc.reconfig_supported = 0;
6678         }
6679         if ((stcb->asoc.idata_supported == 1) &&
6680             (peer_supports_idata == 0)) {
6681                 stcb->asoc.idata_supported = 0;
6682         }
6683         if ((stcb->asoc.nrsack_supported == 1) &&
6684             (peer_supports_nrsack == 0)) {
6685                 stcb->asoc.nrsack_supported = 0;
6686         }
6687         if ((stcb->asoc.pktdrop_supported == 1) &&
6688             (peer_supports_pktdrop == 0)) {
6689                 stcb->asoc.pktdrop_supported = 0;
6690         }
6691         /* validate authentication required parameters */
6692         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6693                 /* peer does not support auth but sent a chunks list? */
6694                 return (-31);
6695         }
6696         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6697                 /* peer supports asconf but not auth? */
6698                 return (-32);
6699         } else if ((peer_supports_asconf == 1) &&
6700                     (peer_supports_auth == 1) &&
6701             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6702                 return (-33);
6703         }
6704         /* concatenate the full random key */
6705         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6706         if (chunks != NULL) {
6707                 keylen += sizeof(*chunks) + num_chunks;
6708         }
6709         new_key = sctp_alloc_key(keylen);
6710         if (new_key != NULL) {
6711                 /* copy in the RANDOM */
6712                 if (p_random != NULL) {
6713                         keylen = sizeof(*p_random) + random_len;
6714                         bcopy(p_random, new_key->key, keylen);
6715                 }
6716                 /* append in the AUTH chunks */
6717                 if (chunks != NULL) {
6718                         bcopy(chunks, new_key->key + keylen,
6719                             sizeof(*chunks) + num_chunks);
6720                         keylen += sizeof(*chunks) + num_chunks;
6721                 }
6722                 /* append in the HMACs */
6723                 if (hmacs != NULL) {
6724                         bcopy(hmacs, new_key->key + keylen,
6725                             sizeof(*hmacs) + hmacs_len);
6726                 }
6727         } else {
6728                 /* failed to get memory for the key */
6729                 return (-34);
6730         }
6731         if (stcb->asoc.authinfo.peer_random != NULL)
6732                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6733         stcb->asoc.authinfo.peer_random = new_key;
6734         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6735         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6736
6737         return (0);
6738 }
6739
6740 int
6741 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6742     struct sctp_nets *net)
6743 {
6744         /* make sure the requested primary address exists in the assoc */
6745         if (net == NULL && sa)
6746                 net = sctp_findnet(stcb, sa);
6747
6748         if (net == NULL) {
6749                 /* didn't find the requested primary address! */
6750                 return (-1);
6751         } else {
6752                 /* set the primary address */
6753                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6754                         /* Must be confirmed, so queue to set */
6755                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6756                         return (0);
6757                 }
6758                 stcb->asoc.primary_destination = net;
6759                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6760                         sctp_free_remote_addr(stcb->asoc.alternate);
6761                         stcb->asoc.alternate = NULL;
6762                 }
6763                 net = TAILQ_FIRST(&stcb->asoc.nets);
6764                 if (net != stcb->asoc.primary_destination) {
6765                         /*
6766                          * first one on the list is NOT the primary
6767                          * sctp_cmpaddr() is much more efficient if the
6768                          * primary is the first on the list, make it so.
6769                          */
6770                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6771                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6772                 }
6773                 return (0);
6774         }
6775 }
6776
6777 int
6778 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6779 {
6780         /*
6781          * This function serves two purposes. It will see if a TAG can be
6782          * re-used and return 1 for yes it is ok and 0 for don't use that
6783          * tag. A secondary function it will do is purge out old tags that
6784          * can be removed.
6785          */
6786         struct sctpvtaghead *chain;
6787         struct sctp_tagblock *twait_block;
6788         struct sctpasochead *head;
6789         struct sctp_tcb *stcb;
6790         int i;
6791
6792         SCTP_INP_INFO_RLOCK();
6793         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6794             SCTP_BASE_INFO(hashasocmark))];
6795         LIST_FOREACH(stcb, head, sctp_asocs) {
6796                 /*
6797                  * We choose not to lock anything here. TCB's can't be
6798                  * removed since we have the read lock, so they can't be
6799                  * freed on us, same thing for the INP. I may be wrong with
6800                  * this assumption, but we will go with it for now :-)
6801                  */
6802                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6803                         continue;
6804                 }
6805                 if (stcb->asoc.my_vtag == tag) {
6806                         /* candidate */
6807                         if (stcb->rport != rport) {
6808                                 continue;
6809                         }
6810                         if (stcb->sctp_ep->sctp_lport != lport) {
6811                                 continue;
6812                         }
6813                         /* Its a used tag set */
6814                         SCTP_INP_INFO_RUNLOCK();
6815                         return (0);
6816                 }
6817         }
6818         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6819         /* Now what about timed wait ? */
6820         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6821                 /*
6822                  * Block(s) are present, lets see if we have this tag in the
6823                  * list
6824                  */
6825                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6826                         if (twait_block->vtag_block[i].v_tag == 0) {
6827                                 /* not used */
6828                                 continue;
6829                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6830                             now->tv_sec) {
6831                                 /* Audit expires this guy */
6832                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6833                                 twait_block->vtag_block[i].v_tag = 0;
6834                                 twait_block->vtag_block[i].lport = 0;
6835                                 twait_block->vtag_block[i].rport = 0;
6836                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6837                                     (twait_block->vtag_block[i].lport == lport) &&
6838                             (twait_block->vtag_block[i].rport == rport)) {
6839                                 /* Bad tag, sorry :< */
6840                                 SCTP_INP_INFO_RUNLOCK();
6841                                 return (0);
6842                         }
6843                 }
6844         }
6845         SCTP_INP_INFO_RUNLOCK();
6846         return (1);
6847 }
6848
6849 static void
6850 sctp_drain_mbufs(struct sctp_tcb *stcb)
6851 {
6852         /*
6853          * We must hunt this association for MBUF's past the cumack (i.e.
6854          * out of order data that we can renege on).
6855          */
6856         struct sctp_association *asoc;
6857         struct sctp_tmit_chunk *chk, *nchk;
6858         uint32_t cumulative_tsn_p1;
6859         struct sctp_queued_to_read *ctl, *nctl;
6860         int cnt, strmat;
6861         uint32_t gap, i;
6862         int fnd = 0;
6863
6864         /* We look for anything larger than the cum-ack + 1 */
6865
6866         asoc = &stcb->asoc;
6867         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6868                 /* none we can reneg on. */
6869                 return;
6870         }
6871         SCTP_STAT_INCR(sctps_protocol_drains_done);
6872         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6873         cnt = 0;
6874         /* Ok that was fun, now we will drain all the inbound streams? */
6875         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6876                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next_instrm, nctl) {
6877                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6878                                 /* Yep it is above cum-ack */
6879                                 cnt++;
6880                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6881                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6882                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6883                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6884                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next_instrm);
6885                                 if (ctl->data) {
6886                                         sctp_m_freem(ctl->data);
6887                                         ctl->data = NULL;
6888                                 }
6889                                 sctp_free_remote_addr(ctl->whoFrom);
6890                                 /* Now its reasm? */
6891                                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
6892                                         cnt++;
6893                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6894                                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6895                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6896                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6897                                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
6898                                         if (chk->data) {
6899                                                 sctp_m_freem(chk->data);
6900                                                 chk->data = NULL;
6901                                         }
6902                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6903                                 }
6904                                 sctp_free_a_readq(stcb, ctl);
6905                         }
6906                 }
6907                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].uno_inqueue, next_instrm, nctl) {
6908                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6909                                 /* Yep it is above cum-ack */
6910                                 cnt++;
6911                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6912                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6913                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6914                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6915                                 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, ctl, next_instrm);
6916                                 if (ctl->data) {
6917                                         sctp_m_freem(ctl->data);
6918                                         ctl->data = NULL;
6919                                 }
6920                                 sctp_free_remote_addr(ctl->whoFrom);
6921                                 /* Now its reasm? */
6922                                 TAILQ_FOREACH_SAFE(chk, &ctl->reasm, sctp_next, nchk) {
6923                                         cnt++;
6924                                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6925                                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6926                                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6927                                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6928                                         TAILQ_REMOVE(&ctl->reasm, chk, sctp_next);
6929                                         if (chk->data) {
6930                                                 sctp_m_freem(chk->data);
6931                                                 chk->data = NULL;
6932                                         }
6933                                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6934                                 }
6935                                 sctp_free_a_readq(stcb, ctl);
6936                         }
6937                 }
6938         }
6939         if (cnt) {
6940                 /* We must back down to see what the new highest is */
6941                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6942                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6943                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6944                                 asoc->highest_tsn_inside_map = i;
6945                                 fnd = 1;
6946                                 break;
6947                         }
6948                 }
6949                 if (!fnd) {
6950                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6951                 }
6952                 /*
6953                  * Question, should we go through the delivery queue? The
6954                  * only reason things are on here is the app not reading OR
6955                  * a p-d-api up. An attacker COULD send enough in to
6956                  * initiate the PD-API and then send a bunch of stuff to
6957                  * other streams... these would wind up on the delivery
6958                  * queue.. and then we would not get to them. But in order
6959                  * to do this I then have to back-track and un-deliver
6960                  * sequence numbers in streams.. el-yucko. I think for now
6961                  * we will NOT look at the delivery queue and leave it to be
6962                  * something to consider later. An alternative would be to
6963                  * abort the P-D-API with a notification and then deliver
6964                  * the data.... Or another method might be to keep track of
6965                  * how many times the situation occurs and if we see a
6966                  * possible attack underway just abort the association.
6967                  */
6968 #ifdef SCTP_DEBUG
6969                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6970 #endif
6971                 /*
6972                  * Now do we need to find a new
6973                  * asoc->highest_tsn_inside_map?
6974                  */
6975                 asoc->last_revoke_count = cnt;
6976                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6977                 /* sa_ignore NO_NULL_CHK */
6978                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6979                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6980         }
6981         /*
6982          * Another issue, in un-setting the TSN's in the mapping array we
6983          * DID NOT adjust the highest_tsn marker.  This will cause one of
6984          * two things to occur. It may cause us to do extra work in checking
6985          * for our mapping array movement. More importantly it may cause us
6986          * to SACK every datagram. This may not be a bad thing though since
6987          * we will recover once we get our cum-ack above and all this stuff
6988          * we dumped recovered.
6989          */
6990 }
6991
6992 void
6993 sctp_drain()
6994 {
6995         /*
6996          * We must walk the PCB lists for ALL associations here. The system
6997          * is LOW on MBUF's and needs help. This is where reneging will
6998          * occur. We really hope this does NOT happen!
6999          */
7000         VNET_ITERATOR_DECL(vnet_iter);
7001         VNET_LIST_RLOCK_NOSLEEP();
7002         VNET_FOREACH(vnet_iter) {
7003                 CURVNET_SET(vnet_iter);
7004                 struct sctp_inpcb *inp;
7005                 struct sctp_tcb *stcb;
7006
7007                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
7008                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
7009 #ifdef VIMAGE
7010                         continue;
7011 #else
7012                         return;
7013 #endif
7014                 }
7015                 SCTP_INP_INFO_RLOCK();
7016                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
7017                         /* For each endpoint */
7018                         SCTP_INP_RLOCK(inp);
7019                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
7020                                 /* For each association */
7021                                 SCTP_TCB_LOCK(stcb);
7022                                 sctp_drain_mbufs(stcb);
7023                                 SCTP_TCB_UNLOCK(stcb);
7024                         }
7025                         SCTP_INP_RUNLOCK(inp);
7026                 }
7027                 SCTP_INP_INFO_RUNLOCK();
7028                 CURVNET_RESTORE();
7029         }
7030         VNET_LIST_RUNLOCK_NOSLEEP();
7031 }
7032
7033 /*
7034  * start a new iterator
7035  * iterates through all endpoints and associations based on the pcb_state
7036  * flags and asoc_state.  "af" (mandatory) is executed for all matching
7037  * assocs and "ef" (optional) is executed when the iterator completes.
7038  * "inpf" (optional) is executed for each new endpoint as it is being
7039  * iterated through. inpe (optional) is called when the inp completes
7040  * its way through all the stcbs.
7041  */
7042 int
7043 sctp_initiate_iterator(inp_func inpf,
7044     asoc_func af,
7045     inp_func inpe,
7046     uint32_t pcb_state,
7047     uint32_t pcb_features,
7048     uint32_t asoc_state,
7049     void *argp,
7050     uint32_t argi,
7051     end_func ef,
7052     struct sctp_inpcb *s_inp,
7053     uint8_t chunk_output_off)
7054 {
7055         struct sctp_iterator *it = NULL;
7056
7057         if (af == NULL) {
7058                 return (-1);
7059         }
7060         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7061                 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__,
7062                     SCTP_BASE_VAR(sctp_pcb_initialized));
7063                 return (-1);
7064         }
7065         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
7066             SCTP_M_ITER);
7067         if (it == NULL) {
7068                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
7069                 return (ENOMEM);
7070         }
7071         memset(it, 0, sizeof(*it));
7072         it->function_assoc = af;
7073         it->function_inp = inpf;
7074         if (inpf)
7075                 it->done_current_ep = 0;
7076         else
7077                 it->done_current_ep = 1;
7078         it->function_atend = ef;
7079         it->pointer = argp;
7080         it->val = argi;
7081         it->pcb_flags = pcb_state;
7082         it->pcb_features = pcb_features;
7083         it->asoc_state = asoc_state;
7084         it->function_inp_end = inpe;
7085         it->no_chunk_output = chunk_output_off;
7086         it->vn = curvnet;
7087         if (s_inp) {
7088                 /* Assume lock is held here */
7089                 it->inp = s_inp;
7090                 SCTP_INP_INCR_REF(it->inp);
7091                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7092         } else {
7093                 SCTP_INP_INFO_RLOCK();
7094                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7095                 if (it->inp) {
7096                         SCTP_INP_INCR_REF(it->inp);
7097                 }
7098                 SCTP_INP_INFO_RUNLOCK();
7099                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7100
7101         }
7102         SCTP_IPI_ITERATOR_WQ_LOCK();
7103         if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) {
7104                 SCTP_IPI_ITERATOR_WQ_UNLOCK();
7105                 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__,
7106                     SCTP_BASE_VAR(sctp_pcb_initialized), it);
7107                 SCTP_FREE(it, SCTP_M_ITER);
7108                 return (-1);
7109         }
7110         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7111         if (sctp_it_ctl.iterator_running == 0) {
7112                 sctp_wakeup_iterator();
7113         }
7114         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7115         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7116         return (0);
7117 }