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", __FUNCTION__);
1119                                         continue;
1120                                 }
1121                                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
1122                                         SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n");
1123                                         continue;
1124                                 }
1125                                 if (laddr->ifa->address.sa.sa_family ==
1126                                     to->sa_family) {
1127                                         /* see if it matches */
1128 #ifdef INET
1129                                         if (from->sa_family == AF_INET) {
1130                                                 struct sockaddr_in *intf_addr,
1131                                                            *sin;
1132
1133                                                 intf_addr = &laddr->ifa->address.sin;
1134                                                 sin = (struct sockaddr_in *)to;
1135                                                 if (sin->sin_addr.s_addr ==
1136                                                     intf_addr->sin_addr.s_addr) {
1137                                                         match = 1;
1138                                                         break;
1139                                                 }
1140                                         }
1141 #endif
1142 #ifdef INET6
1143                                         if (from->sa_family == AF_INET6) {
1144                                                 struct sockaddr_in6 *intf_addr6;
1145                                                 struct sockaddr_in6 *sin6;
1146
1147                                                 sin6 = (struct sockaddr_in6 *)
1148                                                     to;
1149                                                 intf_addr6 = &laddr->ifa->address.sin6;
1150
1151                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1152                                                     intf_addr6)) {
1153                                                         match = 1;
1154                                                         break;
1155                                                 }
1156                                         }
1157 #endif
1158                                 }
1159                         }
1160                         if (match == 0) {
1161                                 /* This endpoint does not have this address */
1162                                 SCTP_INP_RUNLOCK(inp);
1163                                 continue;
1164                         }
1165                 }
1166                 /*
1167                  * Ok if we hit here the ep has the address, does it hold
1168                  * the tcb?
1169                  */
1170                 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */
1171                 stcb = LIST_FIRST(&inp->sctp_asoc_list);
1172                 if (stcb == NULL) {
1173                         SCTP_INP_RUNLOCK(inp);
1174                         continue;
1175                 }
1176                 SCTP_TCB_LOCK(stcb);
1177                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1178                         SCTP_TCB_UNLOCK(stcb);
1179                         SCTP_INP_RUNLOCK(inp);
1180                         continue;
1181                 }
1182                 if (stcb->rport != rport) {
1183                         /* remote port does not match. */
1184                         SCTP_TCB_UNLOCK(stcb);
1185                         SCTP_INP_RUNLOCK(inp);
1186                         continue;
1187                 }
1188                 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1189                         SCTP_TCB_UNLOCK(stcb);
1190                         SCTP_INP_RUNLOCK(inp);
1191                         continue;
1192                 }
1193                 if (!sctp_does_stcb_own_this_addr(stcb, to)) {
1194                         SCTP_TCB_UNLOCK(stcb);
1195                         SCTP_INP_RUNLOCK(inp);
1196                         continue;
1197                 }
1198                 /* Does this TCB have a matching address? */
1199                 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1200
1201                         if (net->ro._l_addr.sa.sa_family != from->sa_family) {
1202                                 /* not the same family, can't be a match */
1203                                 continue;
1204                         }
1205                         switch (from->sa_family) {
1206 #ifdef INET
1207                         case AF_INET:
1208                                 {
1209                                         struct sockaddr_in *sin, *rsin;
1210
1211                                         sin = (struct sockaddr_in *)&net->ro._l_addr;
1212                                         rsin = (struct sockaddr_in *)from;
1213                                         if (sin->sin_addr.s_addr ==
1214                                             rsin->sin_addr.s_addr) {
1215                                                 /* found it */
1216                                                 if (netp != NULL) {
1217                                                         *netp = net;
1218                                                 }
1219                                                 /*
1220                                                  * Update the endpoint
1221                                                  * pointer
1222                                                  */
1223                                                 *inp_p = inp;
1224                                                 SCTP_INP_RUNLOCK(inp);
1225                                                 return (stcb);
1226                                         }
1227                                         break;
1228                                 }
1229 #endif
1230 #ifdef INET6
1231                         case AF_INET6:
1232                                 {
1233                                         struct sockaddr_in6 *sin6, *rsin6;
1234
1235                                         sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1236                                         rsin6 = (struct sockaddr_in6 *)from;
1237                                         if (SCTP6_ARE_ADDR_EQUAL(sin6,
1238                                             rsin6)) {
1239                                                 /* found it */
1240                                                 if (netp != NULL) {
1241                                                         *netp = net;
1242                                                 }
1243                                                 /*
1244                                                  * Update the endpoint
1245                                                  * pointer
1246                                                  */
1247                                                 *inp_p = inp;
1248                                                 SCTP_INP_RUNLOCK(inp);
1249                                                 return (stcb);
1250                                         }
1251                                         break;
1252                                 }
1253 #endif
1254                         default:
1255                                 /* TSNH */
1256                                 break;
1257                         }
1258                 }
1259                 SCTP_TCB_UNLOCK(stcb);
1260                 SCTP_INP_RUNLOCK(inp);
1261         }
1262         return (NULL);
1263 }
1264
1265
1266 /*
1267  * rules for use
1268  *
1269  * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an
1270  * stcb, both will be locked (locked_tcb and stcb) but decrement will be done
1271  * (if locked == NULL). 3) Decrement happens on return ONLY if locked ==
1272  * NULL.
1273  */
1274
1275 struct sctp_tcb *
1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote,
1277     struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb)
1278 {
1279         struct sctpasochead *head;
1280         struct sctp_inpcb *inp;
1281         struct sctp_tcb *stcb = NULL;
1282         struct sctp_nets *net;
1283         uint16_t rport;
1284
1285         inp = *inp_p;
1286         switch (remote->sa_family) {
1287 #ifdef INET
1288         case AF_INET:
1289                 rport = (((struct sockaddr_in *)remote)->sin_port);
1290                 break;
1291 #endif
1292 #ifdef INET6
1293         case AF_INET6:
1294                 rport = (((struct sockaddr_in6 *)remote)->sin6_port);
1295                 break;
1296 #endif
1297         default:
1298                 return (NULL);
1299         }
1300         if (locked_tcb) {
1301                 /*
1302                  * UN-lock so we can do proper locking here this occurs when
1303                  * called from load_addresses_from_init.
1304                  */
1305                 atomic_add_int(&locked_tcb->asoc.refcnt, 1);
1306                 SCTP_TCB_UNLOCK(locked_tcb);
1307         }
1308         SCTP_INP_INFO_RLOCK();
1309         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
1310             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
1311                 /*-
1312                  * Now either this guy is our listener or it's the
1313                  * connector. If it is the one that issued the connect, then
1314                  * it's only chance is to be the first TCB in the list. If
1315                  * it is the acceptor, then do the special_lookup to hash
1316                  * and find the real inp.
1317                  */
1318                 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) {
1319                         /* to is peer addr, from is my addr */
1320                         stcb = sctp_tcb_special_locate(inp_p, remote, local,
1321                             netp, inp->def_vrf_id);
1322                         if ((stcb != NULL) && (locked_tcb == NULL)) {
1323                                 /* we have a locked tcb, lower refcount */
1324                                 SCTP_INP_DECR_REF(inp);
1325                         }
1326                         if ((locked_tcb != NULL) && (locked_tcb != stcb)) {
1327                                 SCTP_INP_RLOCK(locked_tcb->sctp_ep);
1328                                 SCTP_TCB_LOCK(locked_tcb);
1329                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1330                                 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep);
1331                         }
1332                         SCTP_INP_INFO_RUNLOCK();
1333                         return (stcb);
1334                 } else {
1335                         SCTP_INP_WLOCK(inp);
1336                         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1337                                 goto null_return;
1338                         }
1339                         stcb = LIST_FIRST(&inp->sctp_asoc_list);
1340                         if (stcb == NULL) {
1341                                 goto null_return;
1342                         }
1343                         SCTP_TCB_LOCK(stcb);
1344
1345                         if (stcb->rport != rport) {
1346                                 /* remote port does not match. */
1347                                 SCTP_TCB_UNLOCK(stcb);
1348                                 goto null_return;
1349                         }
1350                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
1351                                 SCTP_TCB_UNLOCK(stcb);
1352                                 goto null_return;
1353                         }
1354                         if (local && !sctp_does_stcb_own_this_addr(stcb, local)) {
1355                                 SCTP_TCB_UNLOCK(stcb);
1356                                 goto null_return;
1357                         }
1358                         /* now look at the list of remote addresses */
1359                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
1360 #ifdef INVARIANTS
1361                                 if (net == (TAILQ_NEXT(net, sctp_next))) {
1362                                         panic("Corrupt net list");
1363                                 }
1364 #endif
1365                                 if (net->ro._l_addr.sa.sa_family !=
1366                                     remote->sa_family) {
1367                                         /* not the same family */
1368                                         continue;
1369                                 }
1370                                 switch (remote->sa_family) {
1371 #ifdef INET
1372                                 case AF_INET:
1373                                         {
1374                                                 struct sockaddr_in *sin,
1375                                                            *rsin;
1376
1377                                                 sin = (struct sockaddr_in *)
1378                                                     &net->ro._l_addr;
1379                                                 rsin = (struct sockaddr_in *)remote;
1380                                                 if (sin->sin_addr.s_addr ==
1381                                                     rsin->sin_addr.s_addr) {
1382                                                         /* found it */
1383                                                         if (netp != NULL) {
1384                                                                 *netp = net;
1385                                                         }
1386                                                         if (locked_tcb == NULL) {
1387                                                                 SCTP_INP_DECR_REF(inp);
1388                                                         } else if (locked_tcb != stcb) {
1389                                                                 SCTP_TCB_LOCK(locked_tcb);
1390                                                         }
1391                                                         if (locked_tcb) {
1392                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1393                                                         }
1394                                                         SCTP_INP_WUNLOCK(inp);
1395                                                         SCTP_INP_INFO_RUNLOCK();
1396                                                         return (stcb);
1397                                                 }
1398                                                 break;
1399                                         }
1400 #endif
1401 #ifdef INET6
1402                                 case AF_INET6:
1403                                         {
1404                                                 struct sockaddr_in6 *sin6,
1405                                                             *rsin6;
1406
1407                                                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
1408                                                 rsin6 = (struct sockaddr_in6 *)remote;
1409                                                 if (SCTP6_ARE_ADDR_EQUAL(sin6,
1410                                                     rsin6)) {
1411                                                         /* found it */
1412                                                         if (netp != NULL) {
1413                                                                 *netp = net;
1414                                                         }
1415                                                         if (locked_tcb == NULL) {
1416                                                                 SCTP_INP_DECR_REF(inp);
1417                                                         } else if (locked_tcb != stcb) {
1418                                                                 SCTP_TCB_LOCK(locked_tcb);
1419                                                         }
1420                                                         if (locked_tcb) {
1421                                                                 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1);
1422                                                         }
1423                                                         SCTP_INP_WUNLOCK(inp);
1424                                                         SCTP_INP_INFO_RUNLOCK();
1425                                                         return (stcb);
1426                                                 }
1427                                                 break;
1428                                         }
1429 #endif
1430                                 default:
1431                                         /* TSNH */
1432                                         break;
1433                                 }
1434                         }
1435                         SCTP_TCB_UNLOCK(stcb);
1436                 }
1437         } else {
1438                 SCTP_INP_WLOCK(inp);
1439                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1440                         goto null_return;
1441                 }
1442                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport,
1443                     inp->sctp_hashmark)];
1444                 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                                     __FUNCTION__);
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;
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         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport,
1881             SCTP_BASE_INFO(hashmark))];
1882         /* Kick out all non-listeners to the TCP hash */
1883         LIST_FOREACH(tinp, head, sctp_hash) {
1884                 if (tinp->sctp_lport != inp->sctp_lport) {
1885                         continue;
1886                 }
1887                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
1888                         continue;
1889                 }
1890                 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
1891                         continue;
1892                 }
1893                 if (tinp->sctp_socket->so_qlimit) {
1894                         continue;
1895                 }
1896                 SCTP_INP_WLOCK(tinp);
1897                 LIST_REMOVE(tinp, sctp_hash);
1898                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))];
1899                 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
1900                 LIST_INSERT_HEAD(head, tinp, sctp_hash);
1901                 SCTP_INP_WUNLOCK(tinp);
1902         }
1903         SCTP_INP_WLOCK(inp);
1904         /* Pull from where he was */
1905         LIST_REMOVE(inp, sctp_hash);
1906         inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL;
1907         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))];
1908         LIST_INSERT_HEAD(head, inp, sctp_hash);
1909         SCTP_INP_WUNLOCK(inp);
1910         SCTP_INP_RLOCK(inp);
1911         return (0);
1912 }
1913
1914
1915 struct sctp_inpcb *
1916 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock,
1917     uint32_t vrf_id)
1918 {
1919         /*
1920          * First we check the hash table to see if someone has this port
1921          * bound with just the port.
1922          */
1923         struct sctp_inpcb *inp;
1924         struct sctppcbhead *head;
1925         int lport;
1926         unsigned int i;
1927
1928 #ifdef INET
1929         struct sockaddr_in *sin;
1930
1931 #endif
1932 #ifdef INET6
1933         struct sockaddr_in6 *sin6;
1934
1935 #endif
1936
1937         switch (nam->sa_family) {
1938 #ifdef INET
1939         case AF_INET:
1940                 sin = (struct sockaddr_in *)nam;
1941                 lport = sin->sin_port;
1942                 break;
1943 #endif
1944 #ifdef INET6
1945         case AF_INET6:
1946                 sin6 = (struct sockaddr_in6 *)nam;
1947                 lport = sin6->sin6_port;
1948                 break;
1949 #endif
1950         default:
1951                 return (NULL);
1952         }
1953         /*
1954          * I could cheat here and just cast to one of the types but we will
1955          * do it right. It also provides the check against an Unsupported
1956          * type too.
1957          */
1958         /* Find the head of the ALLADDR chain */
1959         if (have_lock == 0) {
1960                 SCTP_INP_INFO_RLOCK();
1961         }
1962         head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport,
1963             SCTP_BASE_INFO(hashmark))];
1964         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1965
1966         /*
1967          * If the TCP model exists it could be that the main listening
1968          * endpoint is gone but there still exists a connected socket for
1969          * this guy. If so we can return the first one that we find. This
1970          * may NOT be the correct one so the caller should be wary on the
1971          * returned INP. Currently the only caller that sets find_tcp_pool
1972          * is in bindx where we are verifying that a user CAN bind the
1973          * address. He either has bound it already, or someone else has, or
1974          * its open to bind, so this is good enough.
1975          */
1976         if (inp == NULL && find_tcp_pool) {
1977                 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) {
1978                         head = &SCTP_BASE_INFO(sctp_tcpephash)[i];
1979                         inp = sctp_endpoint_probe(nam, head, lport, vrf_id);
1980                         if (inp) {
1981                                 break;
1982                         }
1983                 }
1984         }
1985         if (inp) {
1986                 SCTP_INP_INCR_REF(inp);
1987         }
1988         if (have_lock == 0) {
1989                 SCTP_INP_INFO_RUNLOCK();
1990         }
1991         return (inp);
1992 }
1993
1994
1995 /*
1996  * Find an association for an endpoint with the pointer to whom you want to
1997  * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may
1998  * need to change the *to to some other struct like a mbuf...
1999  */
2000 struct sctp_tcb *
2001 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to,
2002     struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool,
2003     uint32_t vrf_id)
2004 {
2005         struct sctp_inpcb *inp = NULL;
2006         struct sctp_tcb *stcb;
2007
2008         SCTP_INP_INFO_RLOCK();
2009         if (find_tcp_pool) {
2010                 if (inp_p != NULL) {
2011                         stcb = sctp_tcb_special_locate(inp_p, from, to, netp,
2012                             vrf_id);
2013                 } else {
2014                         stcb = sctp_tcb_special_locate(&inp, from, to, netp,
2015                             vrf_id);
2016                 }
2017                 if (stcb != NULL) {
2018                         SCTP_INP_INFO_RUNLOCK();
2019                         return (stcb);
2020                 }
2021         }
2022         inp = sctp_pcb_findep(to, 0, 1, vrf_id);
2023         if (inp_p != NULL) {
2024                 *inp_p = inp;
2025         }
2026         SCTP_INP_INFO_RUNLOCK();
2027         if (inp == NULL) {
2028                 return (NULL);
2029         }
2030         /*
2031          * ok, we have an endpoint, now lets find the assoc for it (if any)
2032          * we now place the source address or from in the to of the find
2033          * endpoint call. Since in reality this chain is used from the
2034          * inbound packet side.
2035          */
2036         if (inp_p != NULL) {
2037                 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to,
2038                     NULL);
2039         } else {
2040                 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to,
2041                     NULL);
2042         }
2043         return (stcb);
2044 }
2045
2046
2047 /*
2048  * This routine will grub through the mbuf that is a INIT or INIT-ACK and
2049  * find all addresses that the sender has specified in any address list. Each
2050  * address will be used to lookup the TCB and see if one exits.
2051  */
2052 static struct sctp_tcb *
2053 sctp_findassociation_special_addr(struct mbuf *m, int offset,
2054     struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp,
2055     struct sockaddr *dst)
2056 {
2057         struct sctp_paramhdr *phdr, parm_buf;
2058
2059 #if defined(INET) || defined(INET6)
2060         struct sctp_tcb *stcb;
2061         uint16_t ptype;
2062
2063 #endif
2064         uint16_t plen;
2065
2066 #ifdef INET
2067         struct sockaddr_in sin4;
2068
2069 #endif
2070 #ifdef INET6
2071         struct sockaddr_in6 sin6;
2072
2073 #endif
2074
2075 #ifdef INET
2076         memset(&sin4, 0, sizeof(sin4));
2077         sin4.sin_len = sizeof(sin4);
2078         sin4.sin_family = AF_INET;
2079         sin4.sin_port = sh->src_port;
2080 #endif
2081 #ifdef INET6
2082         memset(&sin6, 0, sizeof(sin6));
2083         sin6.sin6_len = sizeof(sin6);
2084         sin6.sin6_family = AF_INET6;
2085         sin6.sin6_port = sh->src_port;
2086 #endif
2087
2088         offset += sizeof(struct sctp_init_chunk);
2089
2090         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
2091         while (phdr != NULL) {
2092                 /* now we must see if we want the parameter */
2093 #if defined(INET) || defined(INET6)
2094                 ptype = ntohs(phdr->param_type);
2095 #endif
2096                 plen = ntohs(phdr->param_length);
2097                 if (plen == 0) {
2098                         break;
2099                 }
2100 #ifdef INET
2101                 if (ptype == SCTP_IPV4_ADDRESS &&
2102                     plen == sizeof(struct sctp_ipv4addr_param)) {
2103                         /* Get the rest of the address */
2104                         struct sctp_ipv4addr_param ip4_parm, *p4;
2105
2106                         phdr = sctp_get_next_param(m, offset,
2107                             (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm)));
2108                         if (phdr == NULL) {
2109                                 return (NULL);
2110                         }
2111                         p4 = (struct sctp_ipv4addr_param *)phdr;
2112                         memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr));
2113                         /* look it up */
2114                         stcb = sctp_findassociation_ep_addr(inp_p,
2115                             (struct sockaddr *)&sin4, netp, dst, NULL);
2116                         if (stcb != NULL) {
2117                                 return (stcb);
2118                         }
2119                 }
2120 #endif
2121 #ifdef INET6
2122                 if (ptype == SCTP_IPV6_ADDRESS &&
2123                     plen == sizeof(struct sctp_ipv6addr_param)) {
2124                         /* Get the rest of the address */
2125                         struct sctp_ipv6addr_param ip6_parm, *p6;
2126
2127                         phdr = sctp_get_next_param(m, offset,
2128                             (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm)));
2129                         if (phdr == NULL) {
2130                                 return (NULL);
2131                         }
2132                         p6 = (struct sctp_ipv6addr_param *)phdr;
2133                         memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr));
2134                         /* look it up */
2135                         stcb = sctp_findassociation_ep_addr(inp_p,
2136                             (struct sockaddr *)&sin6, netp, dst, NULL);
2137                         if (stcb != NULL) {
2138                                 return (stcb);
2139                         }
2140                 }
2141 #endif
2142                 offset += SCTP_SIZE32(plen);
2143                 phdr = sctp_get_next_param(m, offset, &parm_buf,
2144                     sizeof(parm_buf));
2145         }
2146         return (NULL);
2147 }
2148
2149 static struct sctp_tcb *
2150 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag,
2151     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport,
2152     uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag)
2153 {
2154         /*
2155          * Use my vtag to hash. If we find it we then verify the source addr
2156          * is in the assoc. If all goes well we save a bit on rec of a
2157          * packet.
2158          */
2159         struct sctpasochead *head;
2160         struct sctp_nets *net;
2161         struct sctp_tcb *stcb;
2162
2163         SCTP_INP_INFO_RLOCK();
2164         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag,
2165             SCTP_BASE_INFO(hashasocmark))];
2166         LIST_FOREACH(stcb, head, sctp_asocs) {
2167                 SCTP_INP_RLOCK(stcb->sctp_ep);
2168                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
2169                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2170                         continue;
2171                 }
2172                 if (stcb->sctp_ep->def_vrf_id != vrf_id) {
2173                         SCTP_INP_RUNLOCK(stcb->sctp_ep);
2174                         continue;
2175                 }
2176                 SCTP_TCB_LOCK(stcb);
2177                 SCTP_INP_RUNLOCK(stcb->sctp_ep);
2178                 if (stcb->asoc.my_vtag == vtag) {
2179                         /* candidate */
2180                         if (stcb->rport != rport) {
2181                                 SCTP_TCB_UNLOCK(stcb);
2182                                 continue;
2183                         }
2184                         if (stcb->sctp_ep->sctp_lport != lport) {
2185                                 SCTP_TCB_UNLOCK(stcb);
2186                                 continue;
2187                         }
2188                         if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
2189                                 SCTP_TCB_UNLOCK(stcb);
2190                                 continue;
2191                         }
2192                         /* RRS:Need toaddr check here */
2193                         if (sctp_does_stcb_own_this_addr(stcb, to) == 0) {
2194                                 /* Endpoint does not own this address */
2195                                 SCTP_TCB_UNLOCK(stcb);
2196                                 continue;
2197                         }
2198                         if (remote_tag) {
2199                                 /*
2200                                  * If we have both vtags that's all we match
2201                                  * on
2202                                  */
2203                                 if (stcb->asoc.peer_vtag == remote_tag) {
2204                                         /*
2205                                          * If both tags match we consider it
2206                                          * conclusive and check NO
2207                                          * source/destination addresses
2208                                          */
2209                                         goto conclusive;
2210                                 }
2211                         }
2212                         if (skip_src_check) {
2213                 conclusive:
2214                                 if (from) {
2215                                         *netp = sctp_findnet(stcb, from);
2216                                 } else {
2217                                         *netp = NULL;   /* unknown */
2218                                 }
2219                                 if (inp_p)
2220                                         *inp_p = stcb->sctp_ep;
2221                                 SCTP_INP_INFO_RUNLOCK();
2222                                 return (stcb);
2223                         }
2224                         net = sctp_findnet(stcb, from);
2225                         if (net) {
2226                                 /* yep its him. */
2227                                 *netp = net;
2228                                 SCTP_STAT_INCR(sctps_vtagexpress);
2229                                 *inp_p = stcb->sctp_ep;
2230                                 SCTP_INP_INFO_RUNLOCK();
2231                                 return (stcb);
2232                         } else {
2233                                 /*
2234                                  * not him, this should only happen in rare
2235                                  * cases so I peg it.
2236                                  */
2237                                 SCTP_STAT_INCR(sctps_vtagbogus);
2238                         }
2239                 }
2240                 SCTP_TCB_UNLOCK(stcb);
2241         }
2242         SCTP_INP_INFO_RUNLOCK();
2243         return (NULL);
2244 }
2245
2246
2247 /*
2248  * Find an association with the pointer to the inbound IP packet. This can be
2249  * a IPv4 or IPv6 packet.
2250  */
2251 struct sctp_tcb *
2252 sctp_findassociation_addr(struct mbuf *m, int offset,
2253     struct sockaddr *src, struct sockaddr *dst,
2254     struct sctphdr *sh, struct sctp_chunkhdr *ch,
2255     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2256 {
2257         int find_tcp_pool;
2258         struct sctp_tcb *stcb;
2259         struct sctp_inpcb *inp;
2260
2261         if (sh->v_tag) {
2262                 /* we only go down this path if vtag is non-zero */
2263                 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag),
2264                     inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0);
2265                 if (stcb) {
2266                         return (stcb);
2267                 }
2268         }
2269         find_tcp_pool = 0;
2270         if ((ch->chunk_type != SCTP_INITIATION) &&
2271             (ch->chunk_type != SCTP_INITIATION_ACK) &&
2272             (ch->chunk_type != SCTP_COOKIE_ACK) &&
2273             (ch->chunk_type != SCTP_COOKIE_ECHO)) {
2274                 /* Other chunk types go to the tcp pool. */
2275                 find_tcp_pool = 1;
2276         }
2277         if (inp_p) {
2278                 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp,
2279                     find_tcp_pool, vrf_id);
2280                 inp = *inp_p;
2281         } else {
2282                 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp,
2283                     find_tcp_pool, vrf_id);
2284         }
2285         SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp);
2286         if (stcb == NULL && inp) {
2287                 /* Found a EP but not this address */
2288                 if ((ch->chunk_type == SCTP_INITIATION) ||
2289                     (ch->chunk_type == SCTP_INITIATION_ACK)) {
2290                         /*-
2291                          * special hook, we do NOT return linp or an
2292                          * association that is linked to an existing
2293                          * association that is under the TCP pool (i.e. no
2294                          * listener exists). The endpoint finding routine
2295                          * will always find a listener before examining the
2296                          * TCP pool.
2297                          */
2298                         if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) {
2299                                 if (inp_p) {
2300                                         *inp_p = NULL;
2301                                 }
2302                                 return (NULL);
2303                         }
2304                         stcb = sctp_findassociation_special_addr(m,
2305                             offset, sh, &inp, netp, dst);
2306                         if (inp_p != NULL) {
2307                                 *inp_p = inp;
2308                         }
2309                 }
2310         }
2311         SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb);
2312         return (stcb);
2313 }
2314
2315 /*
2316  * lookup an association by an ASCONF lookup address.
2317  * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup
2318  */
2319 struct sctp_tcb *
2320 sctp_findassociation_ep_asconf(struct mbuf *m, int offset,
2321     struct sockaddr *dst, struct sctphdr *sh,
2322     struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id)
2323 {
2324         struct sctp_tcb *stcb;
2325         union sctp_sockstore remote_store;
2326         struct sctp_paramhdr parm_buf, *phdr;
2327         int ptype;
2328         int zero_address = 0;
2329
2330 #ifdef INET
2331         struct sockaddr_in *sin;
2332
2333 #endif
2334 #ifdef INET6
2335         struct sockaddr_in6 *sin6;
2336
2337 #endif
2338
2339         memset(&remote_store, 0, sizeof(remote_store));
2340         phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk),
2341             &parm_buf, sizeof(struct sctp_paramhdr));
2342         if (phdr == NULL) {
2343                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n",
2344                     __FUNCTION__);
2345                 return NULL;
2346         }
2347         ptype = (int)((uint32_t) ntohs(phdr->param_type));
2348         /* get the correlation address */
2349         switch (ptype) {
2350 #ifdef INET6
2351         case SCTP_IPV6_ADDRESS:
2352                 {
2353                         /* ipv6 address param */
2354                         struct sctp_ipv6addr_param *p6, p6_buf;
2355
2356                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) {
2357                                 return NULL;
2358                         }
2359                         p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m,
2360                             offset + sizeof(struct sctp_asconf_chunk),
2361                             &p6_buf.ph, sizeof(*p6));
2362                         if (p6 == NULL) {
2363                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n",
2364                                     __FUNCTION__);
2365                                 return (NULL);
2366                         }
2367                         sin6 = &remote_store.sin6;
2368                         sin6->sin6_family = AF_INET6;
2369                         sin6->sin6_len = sizeof(*sin6);
2370                         sin6->sin6_port = sh->src_port;
2371                         memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr));
2372                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))
2373                                 zero_address = 1;
2374                         break;
2375                 }
2376 #endif
2377 #ifdef INET
2378         case SCTP_IPV4_ADDRESS:
2379                 {
2380                         /* ipv4 address param */
2381                         struct sctp_ipv4addr_param *p4, p4_buf;
2382
2383                         if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) {
2384                                 return NULL;
2385                         }
2386                         p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m,
2387                             offset + sizeof(struct sctp_asconf_chunk),
2388                             &p4_buf.ph, sizeof(*p4));
2389                         if (p4 == NULL) {
2390                                 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n",
2391                                     __FUNCTION__);
2392                                 return (NULL);
2393                         }
2394                         sin = &remote_store.sin;
2395                         sin->sin_family = AF_INET;
2396                         sin->sin_len = sizeof(*sin);
2397                         sin->sin_port = sh->src_port;
2398                         memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr));
2399                         if (sin->sin_addr.s_addr == INADDR_ANY)
2400                                 zero_address = 1;
2401                         break;
2402                 }
2403 #endif
2404         default:
2405                 /* invalid address param type */
2406                 return NULL;
2407         }
2408
2409         if (zero_address) {
2410                 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p,
2411                     netp, sh->src_port, sh->dest_port, 1, vrf_id, 0);
2412                 if (stcb != NULL) {
2413                         SCTP_INP_DECR_REF(*inp_p);
2414                 }
2415         } else {
2416                 stcb = sctp_findassociation_ep_addr(inp_p,
2417                     &remote_store.sa, netp,
2418                     dst, NULL);
2419         }
2420         return (stcb);
2421 }
2422
2423
2424 /*
2425  * allocate a sctp_inpcb and setup a temporary binding to a port/all
2426  * addresses. This way if we don't get a bind we by default pick a ephemeral
2427  * port with all addresses bound.
2428  */
2429 int
2430 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id)
2431 {
2432         /*
2433          * we get called when a new endpoint starts up. We need to allocate
2434          * the sctp_inpcb structure from the zone and init it. Mark it as
2435          * unbound and find a port that we can use as an ephemeral with
2436          * INADDR_ANY. If the user binds later no problem we can then add in
2437          * the specific addresses. And setup the default parameters for the
2438          * EP.
2439          */
2440         int i, error;
2441         struct sctp_inpcb *inp;
2442         struct sctp_pcb *m;
2443         struct timeval time;
2444         sctp_sharedkey_t *null_key;
2445
2446         error = 0;
2447
2448         SCTP_INP_INFO_WLOCK();
2449         inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb);
2450         if (inp == NULL) {
2451                 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n");
2452                 SCTP_INP_INFO_WUNLOCK();
2453                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2454                 return (ENOBUFS);
2455         }
2456         /* zap it */
2457         bzero(inp, sizeof(*inp));
2458
2459         /* bump generations */
2460         /* setup socket pointers */
2461         inp->sctp_socket = so;
2462         inp->ip_inp.inp.inp_socket = so;
2463         inp->ip_inp.inp.inp_cred = crhold(so->so_cred);
2464 #ifdef INET6
2465         if (INP_SOCKAF(so) == AF_INET6) {
2466                 if (MODULE_GLOBAL(ip6_auto_flowlabel)) {
2467                         inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL;
2468                 }
2469                 if (MODULE_GLOBAL(ip6_v6only)) {
2470                         inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY;
2471                 }
2472         }
2473 #endif
2474         inp->sctp_associd_counter = 1;
2475         inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT;
2476         inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT;
2477         inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off);
2478         inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable);
2479         inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable);
2480         inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable);
2481         inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable);
2482         inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable);
2483         inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable);
2484         inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable);
2485         /* init the small hash table we use to track asocid <-> tcb */
2486         inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark);
2487         if (inp->sctp_asocidhash == NULL) {
2488                 crfree(inp->ip_inp.inp.inp_cred);
2489                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2490                 SCTP_INP_INFO_WUNLOCK();
2491                 return (ENOBUFS);
2492         }
2493 #ifdef IPSEC
2494         {
2495                 struct inpcbpolicy *pcb_sp = NULL;
2496
2497                 error = ipsec_init_policy(so, &pcb_sp);
2498                 /* Arrange to share the policy */
2499                 inp->ip_inp.inp.inp_sp = pcb_sp;
2500                 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp;
2501         }
2502         if (error != 0) {
2503                 crfree(inp->ip_inp.inp.inp_cred);
2504                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2505                 SCTP_INP_INFO_WUNLOCK();
2506                 return error;
2507         }
2508 #endif                          /* IPSEC */
2509         SCTP_INCR_EP_COUNT();
2510         inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl);
2511         SCTP_INP_INFO_WUNLOCK();
2512
2513         so->so_pcb = (caddr_t)inp;
2514
2515         if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) {
2516                 /* UDP style socket */
2517                 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE |
2518                     SCTP_PCB_FLAGS_UNBOUND);
2519                 /* Be sure it is NON-BLOCKING IO for UDP */
2520                 /* SCTP_SET_SO_NBIO(so); */
2521         } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) {
2522                 /* TCP style socket */
2523                 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE |
2524                     SCTP_PCB_FLAGS_UNBOUND);
2525                 /* Be sure we have blocking IO by default */
2526                 SCTP_CLEAR_SO_NBIO(so);
2527         } else {
2528                 /*
2529                  * unsupported socket type (RAW, etc)- in case we missed it
2530                  * in protosw
2531                  */
2532                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP);
2533                 so->so_pcb = NULL;
2534                 crfree(inp->ip_inp.inp.inp_cred);
2535                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2536                 return (EOPNOTSUPP);
2537         }
2538         if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) {
2539                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2540                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2541         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) {
2542                 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2543                 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2544         } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) {
2545                 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE);
2546                 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS);
2547         }
2548         inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize),
2549             &inp->sctp_hashmark);
2550         if (inp->sctp_tcbhash == NULL) {
2551                 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n");
2552                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
2553                 so->so_pcb = NULL;
2554                 crfree(inp->ip_inp.inp.inp_cred);
2555                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
2556                 return (ENOBUFS);
2557         }
2558         inp->def_vrf_id = vrf_id;
2559
2560         SCTP_INP_INFO_WLOCK();
2561         SCTP_INP_LOCK_INIT(inp);
2562         INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp");
2563         SCTP_INP_READ_INIT(inp);
2564         SCTP_ASOC_CREATE_LOCK_INIT(inp);
2565         /* lock the new ep */
2566         SCTP_INP_WLOCK(inp);
2567
2568         /* add it to the info area */
2569         LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list);
2570         SCTP_INP_INFO_WUNLOCK();
2571
2572         TAILQ_INIT(&inp->read_queue);
2573         LIST_INIT(&inp->sctp_addr_list);
2574
2575         LIST_INIT(&inp->sctp_asoc_list);
2576
2577 #ifdef SCTP_TRACK_FREED_ASOCS
2578         /* TEMP CODE */
2579         LIST_INIT(&inp->sctp_asoc_free_list);
2580 #endif
2581         /* Init the timer structure for signature change */
2582         SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer);
2583         inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE;
2584
2585         /* now init the actual endpoint default data */
2586         m = &inp->sctp_ep;
2587
2588         /* setup the base timeout information */
2589         m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC);    /* needed ? */
2590         m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC);    /* needed ? */
2591         m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default));
2592         m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default));
2593         m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default));
2594         m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default));
2595         m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default));
2596         /* all max/min max are in ms */
2597         m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default);
2598         m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default);
2599         m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default);
2600         m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default);
2601         m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default);
2602         m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default);
2603         m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default);
2604         m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default);
2605         m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold);
2606         m->sctp_sws_sender = SCTP_SWS_SENDER_DEF;
2607         m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF;
2608         m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default);
2609         m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default);
2610
2611         m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module);
2612         m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module);
2613         m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default);
2614         /* number of streams to pre-open on a association */
2615         m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default);
2616
2617         /* Add adaptation cookie */
2618         m->adaptation_layer_indicator = 0;
2619         m->adaptation_layer_indicator_provided = 0;
2620
2621         /* seed random number generator */
2622         m->random_counter = 1;
2623         m->store_at = SCTP_SIGNATURE_SIZE;
2624         SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers));
2625         sctp_fill_random_store(m);
2626
2627         /* Minimum cookie size */
2628         m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) +
2629             sizeof(struct sctp_state_cookie);
2630         m->size_of_a_cookie += SCTP_SIGNATURE_SIZE;
2631
2632         /* Setup the initial secret */
2633         (void)SCTP_GETTIME_TIMEVAL(&time);
2634         m->time_of_secret_change = time.tv_sec;
2635
2636         for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
2637                 m->secret_key[0][i] = sctp_select_initial_TSN(m);
2638         }
2639         sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL);
2640
2641         /* How long is a cookie good for ? */
2642         m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default));
2643         /*
2644          * Initialize authentication parameters
2645          */
2646         m->local_hmacs = sctp_default_supported_hmaclist();
2647         m->local_auth_chunks = sctp_alloc_chunklist();
2648         if (inp->asconf_supported) {
2649                 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks);
2650                 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks);
2651         }
2652         m->default_dscp = 0;
2653 #ifdef INET6
2654         m->default_flowlabel = 0;
2655 #endif
2656         m->port = 0;            /* encapsulation disabled by default */
2657         LIST_INIT(&m->shared_keys);
2658         /* add default NULL key as key id 0 */
2659         null_key = sctp_alloc_sharedkey();
2660         sctp_insert_sharedkey(&m->shared_keys, null_key);
2661         SCTP_INP_WUNLOCK(inp);
2662 #ifdef SCTP_LOG_CLOSING
2663         sctp_log_closing(inp, NULL, 12);
2664 #endif
2665         return (error);
2666 }
2667
2668
2669 void
2670 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp,
2671     struct sctp_tcb *stcb)
2672 {
2673         struct sctp_nets *net;
2674         uint16_t lport, rport;
2675         struct sctppcbhead *head;
2676         struct sctp_laddr *laddr, *oladdr;
2677
2678         atomic_add_int(&stcb->asoc.refcnt, 1);
2679         SCTP_TCB_UNLOCK(stcb);
2680         SCTP_INP_INFO_WLOCK();
2681         SCTP_INP_WLOCK(old_inp);
2682         SCTP_INP_WLOCK(new_inp);
2683         SCTP_TCB_LOCK(stcb);
2684         atomic_subtract_int(&stcb->asoc.refcnt, 1);
2685
2686         new_inp->sctp_ep.time_of_secret_change =
2687             old_inp->sctp_ep.time_of_secret_change;
2688         memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key,
2689             sizeof(old_inp->sctp_ep.secret_key));
2690         new_inp->sctp_ep.current_secret_number =
2691             old_inp->sctp_ep.current_secret_number;
2692         new_inp->sctp_ep.last_secret_number =
2693             old_inp->sctp_ep.last_secret_number;
2694         new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie;
2695
2696         /* make it so new data pours into the new socket */
2697         stcb->sctp_socket = new_inp->sctp_socket;
2698         stcb->sctp_ep = new_inp;
2699
2700         /* Copy the port across */
2701         lport = new_inp->sctp_lport = old_inp->sctp_lport;
2702         rport = stcb->rport;
2703         /* Pull the tcb from the old association */
2704         LIST_REMOVE(stcb, sctp_tcbhash);
2705         LIST_REMOVE(stcb, sctp_tcblist);
2706         if (stcb->asoc.in_asocid_hash) {
2707                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
2708         }
2709         /* Now insert the new_inp into the TCP connected hash */
2710         head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))];
2711
2712         LIST_INSERT_HEAD(head, new_inp, sctp_hash);
2713         /* Its safe to access */
2714         new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
2715
2716         /* Now move the tcb into the endpoint list */
2717         LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist);
2718         /*
2719          * Question, do we even need to worry about the ep-hash since we
2720          * only have one connection? Probably not :> so lets get rid of it
2721          * and not suck up any kernel memory in that.
2722          */
2723         if (stcb->asoc.in_asocid_hash) {
2724                 struct sctpasochead *lhd;
2725
2726                 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id,
2727                     new_inp->hashasocidmark)];
2728                 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash);
2729         }
2730         /* Ok. Let's restart timer. */
2731         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2732                 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp,
2733                     stcb, net);
2734         }
2735
2736         SCTP_INP_INFO_WUNLOCK();
2737         if (new_inp->sctp_tcbhash != NULL) {
2738                 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark);
2739                 new_inp->sctp_tcbhash = NULL;
2740         }
2741         if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) {
2742                 /* Subset bound, so copy in the laddr list from the old_inp */
2743                 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) {
2744                         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
2745                         if (laddr == NULL) {
2746                                 /*
2747                                  * Gak, what can we do? This assoc is really
2748                                  * HOSED. We probably should send an abort
2749                                  * here.
2750                                  */
2751                                 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n");
2752                                 continue;
2753                         }
2754                         SCTP_INCR_LADDR_COUNT();
2755                         bzero(laddr, sizeof(*laddr));
2756                         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
2757                         laddr->ifa = oladdr->ifa;
2758                         atomic_add_int(&laddr->ifa->refcount, 1);
2759                         LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr,
2760                             sctp_nxt_addr);
2761                         new_inp->laddr_count++;
2762                         if (oladdr == stcb->asoc.last_used_address) {
2763                                 stcb->asoc.last_used_address = laddr;
2764                         }
2765                 }
2766         }
2767         /*
2768          * Now any running timers need to be adjusted since we really don't
2769          * care if they are running or not just blast in the new_inp into
2770          * all of them.
2771          */
2772
2773         stcb->asoc.dack_timer.ep = (void *)new_inp;
2774         stcb->asoc.asconf_timer.ep = (void *)new_inp;
2775         stcb->asoc.strreset_timer.ep = (void *)new_inp;
2776         stcb->asoc.shut_guard_timer.ep = (void *)new_inp;
2777         stcb->asoc.autoclose_timer.ep = (void *)new_inp;
2778         stcb->asoc.delayed_event_timer.ep = (void *)new_inp;
2779         stcb->asoc.delete_prim_timer.ep = (void *)new_inp;
2780         /* now what about the nets? */
2781         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
2782                 net->pmtu_timer.ep = (void *)new_inp;
2783                 net->hb_timer.ep = (void *)new_inp;
2784                 net->rxt_timer.ep = (void *)new_inp;
2785         }
2786         SCTP_INP_WUNLOCK(new_inp);
2787         SCTP_INP_WUNLOCK(old_inp);
2788 }
2789
2790
2791
2792
2793 /* sctp_ifap is used to bypass normal local address validation checks */
2794 int
2795 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr,
2796     struct sctp_ifa *sctp_ifap, struct thread *p)
2797 {
2798         /* bind a ep to a socket address */
2799         struct sctppcbhead *head;
2800         struct sctp_inpcb *inp, *inp_tmp;
2801         struct inpcb *ip_inp;
2802         int port_reuse_active = 0;
2803         int bindall;
2804         uint16_t lport;
2805         int error;
2806         uint32_t vrf_id;
2807
2808         lport = 0;
2809         bindall = 1;
2810         inp = (struct sctp_inpcb *)so->so_pcb;
2811         ip_inp = (struct inpcb *)so->so_pcb;
2812 #ifdef SCTP_DEBUG
2813         if (addr) {
2814                 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n",
2815                     ntohs(((struct sockaddr_in *)addr)->sin_port));
2816                 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: ");
2817                 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr);
2818         }
2819 #endif
2820         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) {
2821                 /* already did a bind, subsequent binds NOT allowed ! */
2822                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2823                 return (EINVAL);
2824         }
2825 #ifdef INVARIANTS
2826         if (p == NULL)
2827                 panic("null proc/thread");
2828 #endif
2829         if (addr != NULL) {
2830                 switch (addr->sa_family) {
2831 #ifdef INET
2832                 case AF_INET:
2833                         {
2834                                 struct sockaddr_in *sin;
2835
2836                                 /* IPV6_V6ONLY socket? */
2837                                 if (SCTP_IPV6_V6ONLY(ip_inp)) {
2838                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2839                                         return (EINVAL);
2840                                 }
2841                                 if (addr->sa_len != sizeof(*sin)) {
2842                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2843                                         return (EINVAL);
2844                                 }
2845                                 sin = (struct sockaddr_in *)addr;
2846                                 lport = sin->sin_port;
2847                                 /*
2848                                  * For LOOPBACK the prison_local_ip4() call
2849                                  * will transmute the ip address to the
2850                                  * proper value.
2851                                  */
2852                                 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) {
2853                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2854                                         return (error);
2855                                 }
2856                                 if (sin->sin_addr.s_addr != INADDR_ANY) {
2857                                         bindall = 0;
2858                                 }
2859                                 break;
2860                         }
2861 #endif
2862 #ifdef INET6
2863                 case AF_INET6:
2864                         {
2865                                 /*
2866                                  * Only for pure IPv6 Address. (No IPv4
2867                                  * Mapped!)
2868                                  */
2869                                 struct sockaddr_in6 *sin6;
2870
2871                                 sin6 = (struct sockaddr_in6 *)addr;
2872
2873                                 if (addr->sa_len != sizeof(*sin6)) {
2874                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2875                                         return (EINVAL);
2876                                 }
2877                                 lport = sin6->sin6_port;
2878                                 /*
2879                                  * For LOOPBACK the prison_local_ip6() call
2880                                  * will transmute the ipv6 address to the
2881                                  * proper value.
2882                                  */
2883                                 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr,
2884                                     (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) {
2885                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
2886                                         return (error);
2887                                 }
2888                                 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
2889                                         bindall = 0;
2890                                         /* KAME hack: embed scopeid */
2891                                         if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) {
2892                                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
2893                                                 return (EINVAL);
2894                                         }
2895                                 }
2896                                 /* this must be cleared for ifa_ifwithaddr() */
2897                                 sin6->sin6_scope_id = 0;
2898                                 break;
2899                         }
2900 #endif
2901                 default:
2902                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT);
2903                         return (EAFNOSUPPORT);
2904                 }
2905         }
2906         SCTP_INP_INFO_WLOCK();
2907         SCTP_INP_WLOCK(inp);
2908         /* Setup a vrf_id to be the default for the non-bind-all case. */
2909         vrf_id = inp->def_vrf_id;
2910
2911         /* increase our count due to the unlock we do */
2912         SCTP_INP_INCR_REF(inp);
2913         if (lport) {
2914                 /*
2915                  * Did the caller specify a port? if so we must see if an ep
2916                  * already has this one bound.
2917                  */
2918                 /* got to be root to get at low ports */
2919                 if (ntohs(lport) < IPPORT_RESERVED) {
2920                         if (p && (error =
2921                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
2922                             )) {
2923                                 SCTP_INP_DECR_REF(inp);
2924                                 SCTP_INP_WUNLOCK(inp);
2925                                 SCTP_INP_INFO_WUNLOCK();
2926                                 return (error);
2927                         }
2928                 }
2929                 SCTP_INP_WUNLOCK(inp);
2930                 if (bindall) {
2931                         vrf_id = inp->def_vrf_id;
2932                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2933                         if (inp_tmp != NULL) {
2934                                 /*
2935                                  * lock guy returned and lower count note
2936                                  * that we are not bound so inp_tmp should
2937                                  * NEVER be inp. And it is this inp
2938                                  * (inp_tmp) that gets the reference bump,
2939                                  * so we must lower it.
2940                                  */
2941                                 SCTP_INP_DECR_REF(inp_tmp);
2942                                 /* unlock info */
2943                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2944                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2945                                         /*
2946                                          * Ok, must be one-2-one and
2947                                          * allowing port re-use
2948                                          */
2949                                         port_reuse_active = 1;
2950                                         goto continue_anyway;
2951                                 }
2952                                 SCTP_INP_DECR_REF(inp);
2953                                 SCTP_INP_INFO_WUNLOCK();
2954                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2955                                 return (EADDRINUSE);
2956                         }
2957                 } else {
2958                         inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id);
2959                         if (inp_tmp != NULL) {
2960                                 /*
2961                                  * lock guy returned and lower count note
2962                                  * that we are not bound so inp_tmp should
2963                                  * NEVER be inp. And it is this inp
2964                                  * (inp_tmp) that gets the reference bump,
2965                                  * so we must lower it.
2966                                  */
2967                                 SCTP_INP_DECR_REF(inp_tmp);
2968                                 /* unlock info */
2969                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2970                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2971                                         /*
2972                                          * Ok, must be one-2-one and
2973                                          * allowing port re-use
2974                                          */
2975                                         port_reuse_active = 1;
2976                                         goto continue_anyway;
2977                                 }
2978                                 SCTP_INP_DECR_REF(inp);
2979                                 SCTP_INP_INFO_WUNLOCK();
2980                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2981                                 return (EADDRINUSE);
2982                         }
2983                 }
2984 continue_anyway:
2985                 SCTP_INP_WLOCK(inp);
2986                 if (bindall) {
2987                         /* verify that no lport is not used by a singleton */
2988                         if ((port_reuse_active == 0) &&
2989                             (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) {
2990                                 /* Sorry someone already has this one bound */
2991                                 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) &&
2992                                     (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) {
2993                                         port_reuse_active = 1;
2994                                 } else {
2995                                         SCTP_INP_DECR_REF(inp);
2996                                         SCTP_INP_WUNLOCK(inp);
2997                                         SCTP_INP_INFO_WUNLOCK();
2998                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
2999                                         return (EADDRINUSE);
3000                                 }
3001                         }
3002                 }
3003         } else {
3004                 uint16_t first, last, candidate;
3005                 uint16_t count;
3006                 int done;
3007
3008                 if (ip_inp->inp_flags & INP_HIGHPORT) {
3009                         first = MODULE_GLOBAL(ipport_hifirstauto);
3010                         last = MODULE_GLOBAL(ipport_hilastauto);
3011                 } else if (ip_inp->inp_flags & INP_LOWPORT) {
3012                         if (p && (error =
3013                             priv_check(p, PRIV_NETINET_RESERVEDPORT)
3014                             )) {
3015                                 SCTP_INP_DECR_REF(inp);
3016                                 SCTP_INP_WUNLOCK(inp);
3017                                 SCTP_INP_INFO_WUNLOCK();
3018                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error);
3019                                 return (error);
3020                         }
3021                         first = MODULE_GLOBAL(ipport_lowfirstauto);
3022                         last = MODULE_GLOBAL(ipport_lowlastauto);
3023                 } else {
3024                         first = MODULE_GLOBAL(ipport_firstauto);
3025                         last = MODULE_GLOBAL(ipport_lastauto);
3026                 }
3027                 if (first > last) {
3028                         uint16_t temp;
3029
3030                         temp = first;
3031                         first = last;
3032                         last = temp;
3033                 }
3034                 count = last - first + 1;       /* number of candidates */
3035                 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count);
3036
3037                 done = 0;
3038                 while (!done) {
3039                         if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) {
3040                                 done = 1;
3041                         }
3042                         if (!done) {
3043                                 if (--count == 0) {
3044                                         SCTP_INP_DECR_REF(inp);
3045                                         SCTP_INP_WUNLOCK(inp);
3046                                         SCTP_INP_INFO_WUNLOCK();
3047                                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE);
3048                                         return (EADDRINUSE);
3049                                 }
3050                                 if (candidate == last)
3051                                         candidate = first;
3052                                 else
3053                                         candidate = candidate + 1;
3054                         }
3055                 }
3056                 lport = htons(candidate);
3057         }
3058         SCTP_INP_DECR_REF(inp);
3059         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE |
3060             SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
3061                 /*
3062                  * this really should not happen. The guy did a non-blocking
3063                  * bind and then did a close at the same time.
3064                  */
3065                 SCTP_INP_WUNLOCK(inp);
3066                 SCTP_INP_INFO_WUNLOCK();
3067                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3068                 return (EINVAL);
3069         }
3070         /* ok we look clear to give out this port, so lets setup the binding */
3071         if (bindall) {
3072                 /* binding to all addresses, so just set in the proper flags */
3073                 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL;
3074                 /* set the automatic addr changes from kernel flag */
3075                 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) {
3076                         sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3077                         sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3078                 } else {
3079                         sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3080                         sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3081                 }
3082                 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) {
3083                         sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3084                 } else {
3085                         sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS);
3086                 }
3087                 /*
3088                  * set the automatic mobility_base from kernel flag (by
3089                  * micchie)
3090                  */
3091                 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) {
3092                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE);
3093                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3094                 } else {
3095                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE);
3096                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3097                 }
3098                 /*
3099                  * set the automatic mobility_fasthandoff from kernel flag
3100                  * (by micchie)
3101                  */
3102                 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) {
3103                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF);
3104                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3105                 } else {
3106                         sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF);
3107                         sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED);
3108                 }
3109         } else {
3110                 /*
3111                  * bind specific, make sure flags is off and add a new
3112                  * address structure to the sctp_addr_list inside the ep
3113                  * structure.
3114                  *
3115                  * We will need to allocate one and insert it at the head. The
3116                  * socketopt call can just insert new addresses in there as
3117                  * well. It will also have to do the embed scope kame hack
3118                  * too (before adding).
3119                  */
3120                 struct sctp_ifa *ifa;
3121                 union sctp_sockstore store;
3122
3123                 memset(&store, 0, sizeof(store));
3124                 switch (addr->sa_family) {
3125 #ifdef INET
3126                 case AF_INET:
3127                         memcpy(&store.sin, addr, sizeof(struct sockaddr_in));
3128                         store.sin.sin_port = 0;
3129                         break;
3130 #endif
3131 #ifdef INET6
3132                 case AF_INET6:
3133                         memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6));
3134                         store.sin6.sin6_port = 0;
3135                         break;
3136 #endif
3137                 default:
3138                         break;
3139                 }
3140                 /*
3141                  * first find the interface with the bound address need to
3142                  * zero out the port to find the address! yuck! can't do
3143                  * this earlier since need port for sctp_pcb_findep()
3144                  */
3145                 if (sctp_ifap != NULL) {
3146                         ifa = sctp_ifap;
3147                 } else {
3148                         /*
3149                          * Note for BSD we hit here always other O/S's will
3150                          * pass things in via the sctp_ifap argument
3151                          * (Panda).
3152                          */
3153                         ifa = sctp_find_ifa_by_addr(&store.sa,
3154                             vrf_id, SCTP_ADDR_NOT_LOCKED);
3155                 }
3156                 if (ifa == NULL) {
3157                         /* Can't find an interface with that address */
3158                         SCTP_INP_WUNLOCK(inp);
3159                         SCTP_INP_INFO_WUNLOCK();
3160                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL);
3161                         return (EADDRNOTAVAIL);
3162                 }
3163 #ifdef INET6
3164                 if (addr->sa_family == AF_INET6) {
3165                         /* GAK, more FIXME IFA lock? */
3166                         if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
3167                                 /* Can't bind a non-existent addr. */
3168                                 SCTP_INP_WUNLOCK(inp);
3169                                 SCTP_INP_INFO_WUNLOCK();
3170                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
3171                                 return (EINVAL);
3172                         }
3173                 }
3174 #endif
3175                 /* we're not bound all */
3176                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL;
3177                 /* allow bindx() to send ASCONF's for binding changes */
3178                 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF);
3179                 /* clear automatic addr changes from kernel flag */
3180                 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF);
3181
3182                 /* add this address to the endpoint list */
3183                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0);
3184                 if (error != 0) {
3185                         SCTP_INP_WUNLOCK(inp);
3186                         SCTP_INP_INFO_WUNLOCK();
3187                         return (error);
3188                 }
3189                 inp->laddr_count++;
3190         }
3191         /* find the bucket */
3192         if (port_reuse_active) {
3193                 /* Put it into tcp 1-2-1 hash */
3194                 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))];
3195                 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL;
3196         } else {
3197                 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))];
3198         }
3199         /* put it in the bucket */
3200         LIST_INSERT_HEAD(head, inp, sctp_hash);
3201         SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n",
3202             (void *)head, ntohs(lport), port_reuse_active);
3203         /* set in the port */
3204         inp->sctp_lport = lport;
3205
3206         /* turn off just the unbound flag */
3207         inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND;
3208         SCTP_INP_WUNLOCK(inp);
3209         SCTP_INP_INFO_WUNLOCK();
3210         return (0);
3211 }
3212
3213
3214 static void
3215 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp)
3216 {
3217         struct sctp_iterator *it, *nit;
3218
3219         /*
3220          * We enter with the only the ITERATOR_LOCK in place and a write
3221          * lock on the inp_info stuff.
3222          */
3223         it = sctp_it_ctl.cur_it;
3224         if (it && (it->vn != curvnet)) {
3225                 /* Its not looking at our VNET */
3226                 return;
3227         }
3228         if (it && (it->inp == inp)) {
3229                 /*
3230                  * This is tricky and we hold the iterator lock, but when it
3231                  * returns and gets the lock (when we release it) the
3232                  * iterator will try to operate on inp. We need to stop that
3233                  * from happening. But of course the iterator has a
3234                  * reference on the stcb and inp. We can mark it and it will
3235                  * stop.
3236                  *
3237                  * If its a single iterator situation, we set the end iterator
3238                  * flag. Otherwise we set the iterator to go to the next
3239                  * inp.
3240                  *
3241                  */
3242                 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3243                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
3244                 } else {
3245                         sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP;
3246                 }
3247         }
3248         /*
3249          * Now go through and remove any single reference to our inp that
3250          * may be still pending on the list
3251          */
3252         SCTP_IPI_ITERATOR_WQ_LOCK();
3253         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
3254                 if (it->vn != curvnet) {
3255                         continue;
3256                 }
3257                 if (it->inp == inp) {
3258                         /* This one points to me is it inp specific? */
3259                         if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
3260                                 /* Remove and free this one */
3261                                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead,
3262                                     it, sctp_nxt_itr);
3263                                 if (it->function_atend != NULL) {
3264                                         (*it->function_atend) (it->pointer, it->val);
3265                                 }
3266                                 SCTP_FREE(it, SCTP_M_ITER);
3267                         } else {
3268                                 it->inp = LIST_NEXT(it->inp, sctp_list);
3269                                 if (it->inp) {
3270                                         SCTP_INP_INCR_REF(it->inp);
3271                                 }
3272                         }
3273                         /*
3274                          * When its put in the refcnt is incremented so decr
3275                          * it
3276                          */
3277                         SCTP_INP_DECR_REF(inp);
3278                 }
3279         }
3280         SCTP_IPI_ITERATOR_WQ_UNLOCK();
3281 }
3282
3283 /* release sctp_inpcb unbind the port */
3284 void
3285 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from)
3286 {
3287         /*
3288          * Here we free a endpoint. We must find it (if it is in the Hash
3289          * table) and remove it from there. Then we must also find it in the
3290          * overall list and remove it from there. After all removals are
3291          * complete then any timer has to be stopped. Then start the actual
3292          * freeing. a) Any local lists. b) Any associations. c) The hash of
3293          * all associations. d) finally the ep itself.
3294          */
3295         struct sctp_tcb *asoc, *nasoc;
3296         struct sctp_laddr *laddr, *nladdr;
3297         struct inpcb *ip_pcb;
3298         struct socket *so;
3299         int being_refed = 0;
3300         struct sctp_queued_to_read *sq, *nsq;
3301         int cnt;
3302         sctp_sharedkey_t *shared_key, *nshared_key;
3303
3304
3305 #ifdef SCTP_LOG_CLOSING
3306         sctp_log_closing(inp, NULL, 0);
3307 #endif
3308         SCTP_ITERATOR_LOCK();
3309         /* mark any iterators on the list or being processed */
3310         sctp_iterator_inp_being_freed(inp);
3311         SCTP_ITERATOR_UNLOCK();
3312         so = inp->sctp_socket;
3313         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
3314                 /* been here before.. eeks.. get out of here */
3315                 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate);
3316 #ifdef SCTP_LOG_CLOSING
3317                 sctp_log_closing(inp, NULL, 1);
3318 #endif
3319                 return;
3320         }
3321         SCTP_ASOC_CREATE_LOCK(inp);
3322         SCTP_INP_INFO_WLOCK();
3323
3324         SCTP_INP_WLOCK(inp);
3325         if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) {
3326                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP;
3327                 /* socket is gone, so no more wakeups allowed */
3328                 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE;
3329                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT;
3330                 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT;
3331
3332         }
3333         /* First time through we have the socket lock, after that no more. */
3334         sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL,
3335             SCTP_FROM_SCTP_PCB + SCTP_LOC_1);
3336
3337         if (inp->control) {
3338                 sctp_m_freem(inp->control);
3339                 inp->control = NULL;
3340         }
3341         if (inp->pkt) {
3342                 sctp_m_freem(inp->pkt);
3343                 inp->pkt = NULL;
3344         }
3345         ip_pcb = &inp->ip_inp.inp;      /* we could just cast the main pointer
3346                                          * here but I will be nice :> (i.e.
3347                                          * ip_pcb = ep;) */
3348         if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) {
3349                 int cnt_in_sd;
3350
3351                 cnt_in_sd = 0;
3352                 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3353                         SCTP_TCB_LOCK(asoc);
3354                         if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3355                                 /* Skip guys being freed */
3356                                 cnt_in_sd++;
3357                                 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3358                                         /*
3359                                          * Special case - we did not start a
3360                                          * kill timer on the asoc due to it
3361                                          * was not closed. So go ahead and
3362                                          * start it now.
3363                                          */
3364                                         asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3365                                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3366                                 }
3367                                 SCTP_TCB_UNLOCK(asoc);
3368                                 continue;
3369                         }
3370                         if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) ||
3371                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) &&
3372                             (asoc->asoc.total_output_queue_size == 0)) {
3373                                 /*
3374                                  * If we have data in queue, we don't want
3375                                  * to just free since the app may have done,
3376                                  * send()/close or connect/send/close. And
3377                                  * it wants the data to get across first.
3378                                  */
3379                                 /* Just abandon things in the front states */
3380                                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE,
3381                                     SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) {
3382                                         cnt_in_sd++;
3383                                 }
3384                                 continue;
3385                         }
3386                         /* Disconnect the socket please */
3387                         asoc->sctp_socket = NULL;
3388                         asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET;
3389                         if ((asoc->asoc.size_on_reasm_queue > 0) ||
3390                             (asoc->asoc.control_pdapi) ||
3391                             (asoc->asoc.size_on_all_streams > 0) ||
3392                             (so && (so->so_rcv.sb_cc > 0))) {
3393                                 /* Left with Data unread */
3394                                 struct mbuf *op_err;
3395
3396                                 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3397                                 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3;
3398                                 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3399                                 SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3400                                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3401                                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3402                                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3403                                 }
3404                                 if (sctp_free_assoc(inp, asoc,
3405                                     SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) {
3406                                         cnt_in_sd++;
3407                                 }
3408                                 continue;
3409                         } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3410                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3411                             (asoc->asoc.stream_queue_cnt == 0)) {
3412                                 if (asoc->asoc.locked_on_sending) {
3413                                         goto abort_anyway;
3414                                 }
3415                                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) &&
3416                                     (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) {
3417                                         struct sctp_nets *netp;
3418
3419                                         /*
3420                                          * there is nothing queued to send,
3421                                          * so I send shutdown
3422                                          */
3423                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3424                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3425                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3426                                         }
3427                                         SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT);
3428                                         SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING);
3429                                         sctp_stop_timers_for_shutdown(asoc);
3430                                         if (asoc->asoc.alternate) {
3431                                                 netp = asoc->asoc.alternate;
3432                                         } else {
3433                                                 netp = asoc->asoc.primary_destination;
3434                                         }
3435                                         sctp_send_shutdown(asoc, netp);
3436                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc,
3437                                             netp);
3438                                         sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3439                                             asoc->asoc.primary_destination);
3440                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED);
3441                                 }
3442                         } else {
3443                                 /* mark into shutdown pending */
3444                                 struct sctp_stream_queue_pending *sp;
3445
3446                                 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING;
3447                                 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc,
3448                                     asoc->asoc.primary_destination);
3449                                 if (asoc->asoc.locked_on_sending) {
3450                                         sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue),
3451                                             sctp_streamhead);
3452                                         if (sp == NULL) {
3453                                                 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n",
3454                                                     (void *)asoc->asoc.locked_on_sending,
3455                                                     asoc->asoc.locked_on_sending->stream_no);
3456                                         } else {
3457                                                 if ((sp->length == 0) && (sp->msg_is_complete == 0))
3458                                                         asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT;
3459                                         }
3460                                 }
3461                                 if (TAILQ_EMPTY(&asoc->asoc.send_queue) &&
3462                                     TAILQ_EMPTY(&asoc->asoc.sent_queue) &&
3463                                     (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) {
3464                                         struct mbuf *op_err;
3465
3466                         abort_anyway:
3467                                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3468                                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5;
3469                                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3470                                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3471                                         if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3472                                             (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3473                                                 SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3474                                         }
3475                                         if (sctp_free_assoc(inp, asoc,
3476                                             SCTP_PCBFREE_NOFORCE,
3477                                             SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) {
3478                                                 cnt_in_sd++;
3479                                         }
3480                                         continue;
3481                                 } else {
3482                                         sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED);
3483                                 }
3484                         }
3485                         cnt_in_sd++;
3486                         SCTP_TCB_UNLOCK(asoc);
3487                 }
3488                 /* now is there some left in our SHUTDOWN state? */
3489                 if (cnt_in_sd) {
3490 #ifdef SCTP_LOG_CLOSING
3491                         sctp_log_closing(inp, NULL, 2);
3492 #endif
3493                         inp->sctp_socket = NULL;
3494                         SCTP_INP_WUNLOCK(inp);
3495                         SCTP_ASOC_CREATE_UNLOCK(inp);
3496                         SCTP_INP_INFO_WUNLOCK();
3497                         return;
3498                 }
3499         }
3500         inp->sctp_socket = NULL;
3501         if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) !=
3502             SCTP_PCB_FLAGS_UNBOUND) {
3503                 /*
3504                  * ok, this guy has been bound. It's port is somewhere in
3505                  * the SCTP_BASE_INFO(hash table). Remove it!
3506                  */
3507                 LIST_REMOVE(inp, sctp_hash);
3508                 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND;
3509         }
3510         /*
3511          * If there is a timer running to kill us, forget it, since it may
3512          * have a contest on the INP lock.. which would cause us to die ...
3513          */
3514         cnt = 0;
3515         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) {
3516                 SCTP_TCB_LOCK(asoc);
3517                 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3518                         if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) {
3519                                 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
3520                                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL);
3521                         }
3522                         cnt++;
3523                         SCTP_TCB_UNLOCK(asoc);
3524                         continue;
3525                 }
3526                 /* Free associations that are NOT killing us */
3527                 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) &&
3528                     ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) {
3529                         struct mbuf *op_err;
3530
3531                         op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, "");
3532                         asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7;
3533                         sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED);
3534                         SCTP_STAT_INCR_COUNTER32(sctps_aborted);
3535                 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
3536                         cnt++;
3537                         SCTP_TCB_UNLOCK(asoc);
3538                         continue;
3539                 }
3540                 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) ||
3541                     (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
3542                         SCTP_STAT_DECR_GAUGE32(sctps_currestab);
3543                 }
3544                 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) {
3545                         cnt++;
3546                 }
3547         }
3548         if (cnt) {
3549                 /* Ok we have someone out there that will kill us */
3550                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3551 #ifdef SCTP_LOG_CLOSING
3552                 sctp_log_closing(inp, NULL, 3);
3553 #endif
3554                 SCTP_INP_WUNLOCK(inp);
3555                 SCTP_ASOC_CREATE_UNLOCK(inp);
3556                 SCTP_INP_INFO_WUNLOCK();
3557                 return;
3558         }
3559         if (SCTP_INP_LOCK_CONTENDED(inp))
3560                 being_refed++;
3561         if (SCTP_INP_READ_CONTENDED(inp))
3562                 being_refed++;
3563         if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp))
3564                 being_refed++;
3565
3566         if ((inp->refcount) ||
3567             (being_refed) ||
3568             (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) {
3569                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3570 #ifdef SCTP_LOG_CLOSING
3571                 sctp_log_closing(inp, NULL, 4);
3572 #endif
3573                 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL);
3574                 SCTP_INP_WUNLOCK(inp);
3575                 SCTP_ASOC_CREATE_UNLOCK(inp);
3576                 SCTP_INP_INFO_WUNLOCK();
3577                 return;
3578         }
3579         inp->sctp_ep.signature_change.type = 0;
3580         inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE;
3581         /*
3582          * Remove it from the list .. last thing we need a lock for.
3583          */
3584         LIST_REMOVE(inp, sctp_list);
3585         SCTP_INP_WUNLOCK(inp);
3586         SCTP_ASOC_CREATE_UNLOCK(inp);
3587         SCTP_INP_INFO_WUNLOCK();
3588         /*
3589          * Now we release all locks. Since this INP cannot be found anymore
3590          * except possibly by the kill timer that might be running. We call
3591          * the drain function here. It should hit the case were it sees the
3592          * ACTIVE flag cleared and exit out freeing us to proceed and
3593          * destroy everything.
3594          */
3595         if (from != SCTP_CALLED_FROM_INPKILL_TIMER) {
3596                 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer);
3597         } else {
3598                 /* Probably un-needed */
3599                 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer);
3600         }
3601
3602 #ifdef SCTP_LOG_CLOSING
3603         sctp_log_closing(inp, NULL, 5);
3604 #endif
3605
3606
3607         if ((inp->sctp_asocidhash) != NULL) {
3608                 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark);
3609                 inp->sctp_asocidhash = NULL;
3610         }
3611         /* sa_ignore FREED_MEMORY */
3612         TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) {
3613                 /* Its only abandoned if it had data left */
3614                 if (sq->length)
3615                         SCTP_STAT_INCR(sctps_left_abandon);
3616
3617                 TAILQ_REMOVE(&inp->read_queue, sq, next);
3618                 sctp_free_remote_addr(sq->whoFrom);
3619                 if (so)
3620                         so->so_rcv.sb_cc -= sq->length;
3621                 if (sq->data) {
3622                         sctp_m_freem(sq->data);
3623                         sq->data = NULL;
3624                 }
3625                 /*
3626                  * no need to free the net count, since at this point all
3627                  * assoc's are gone.
3628                  */
3629                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
3630                 SCTP_DECR_READQ_COUNT();
3631         }
3632         /* Now the sctp_pcb things */
3633         /*
3634          * free each asoc if it is not already closed/free. we can't use the
3635          * macro here since le_next will get freed as part of the
3636          * sctp_free_assoc() call.
3637          */
3638         if (so) {
3639 #ifdef IPSEC
3640                 ipsec_delete_pcbpolicy(ip_pcb);
3641 #endif                          /* IPSEC */
3642
3643                 /* Unlocks not needed since the socket is gone now */
3644         }
3645         if (ip_pcb->inp_options) {
3646                 (void)sctp_m_free(ip_pcb->inp_options);
3647                 ip_pcb->inp_options = 0;
3648         }
3649 #ifdef INET6
3650         if (ip_pcb->inp_vflag & INP_IPV6) {
3651                 struct in6pcb *in6p;
3652
3653                 in6p = (struct in6pcb *)inp;
3654                 ip6_freepcbopts(in6p->in6p_outputopts);
3655         }
3656 #endif                          /* INET6 */
3657         ip_pcb->inp_vflag = 0;
3658         /* free up authentication fields */
3659         if (inp->sctp_ep.local_auth_chunks != NULL)
3660                 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks);
3661         if (inp->sctp_ep.local_hmacs != NULL)
3662                 sctp_free_hmaclist(inp->sctp_ep.local_hmacs);
3663
3664         LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) {
3665                 LIST_REMOVE(shared_key, next);
3666                 sctp_free_sharedkey(shared_key);
3667                 /* sa_ignore FREED_MEMORY */
3668         }
3669
3670         /*
3671          * if we have an address list the following will free the list of
3672          * ifaddr's that are set into this ep. Again macro limitations here,
3673          * since the LIST_FOREACH could be a bad idea.
3674          */
3675         LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) {
3676                 sctp_remove_laddr(laddr);
3677         }
3678
3679 #ifdef SCTP_TRACK_FREED_ASOCS
3680         /* TEMP CODE */
3681         LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) {
3682                 LIST_REMOVE(asoc, sctp_tcblist);
3683                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc);
3684                 SCTP_DECR_ASOC_COUNT();
3685         }
3686         /* *** END TEMP CODE *** */
3687 #endif
3688         /* Now lets see about freeing the EP hash table. */
3689         if (inp->sctp_tcbhash != NULL) {
3690                 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark);
3691                 inp->sctp_tcbhash = NULL;
3692         }
3693         /* Now we must put the ep memory back into the zone pool */
3694         crfree(inp->ip_inp.inp.inp_cred);
3695         INP_LOCK_DESTROY(&inp->ip_inp.inp);
3696         SCTP_INP_LOCK_DESTROY(inp);
3697         SCTP_INP_READ_DESTROY(inp);
3698         SCTP_ASOC_CREATE_LOCK_DESTROY(inp);
3699         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp);
3700         SCTP_DECR_EP_COUNT();
3701 }
3702
3703
3704 struct sctp_nets *
3705 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr)
3706 {
3707         struct sctp_nets *net;
3708
3709         /* locate the address */
3710         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
3711                 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr))
3712                         return (net);
3713         }
3714         return (NULL);
3715 }
3716
3717
3718 int
3719 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id)
3720 {
3721         struct sctp_ifa *sctp_ifa;
3722
3723         sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED);
3724         if (sctp_ifa) {
3725                 return (1);
3726         } else {
3727                 return (0);
3728         }
3729 }
3730
3731 /*
3732  * add's a remote endpoint address, done with the INIT/INIT-ACK as well as
3733  * when a ASCONF arrives that adds it. It will also initialize all the cwnd
3734  * stats of stuff.
3735  */
3736 int
3737 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr,
3738     struct sctp_nets **netp, int set_scope, int from)
3739 {
3740         /*
3741          * The following is redundant to the same lines in the
3742          * sctp_aloc_assoc() but is needed since others call the add address
3743          * function
3744          */
3745         struct sctp_nets *net, *netfirst;
3746         int addr_inscope;
3747
3748         SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ",
3749             from);
3750         SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr);
3751
3752         netfirst = sctp_findnet(stcb, newaddr);
3753         if (netfirst) {
3754                 /*
3755                  * Lie and return ok, we don't want to make the association
3756                  * go away for this behavior. It will happen in the TCP
3757                  * model in a connected socket. It does not reach the hash
3758                  * table until after the association is built so it can't be
3759                  * found. Mark as reachable, since the initial creation will
3760                  * have been cleared and the NOT_IN_ASSOC flag will have
3761                  * been added... and we don't want to end up removing it
3762                  * back out.
3763                  */
3764                 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) {
3765                         netfirst->dest_state = (SCTP_ADDR_REACHABLE |
3766                             SCTP_ADDR_UNCONFIRMED);
3767                 } else {
3768                         netfirst->dest_state = SCTP_ADDR_REACHABLE;
3769                 }
3770
3771                 return (0);
3772         }
3773         addr_inscope = 1;
3774         switch (newaddr->sa_family) {
3775 #ifdef INET
3776         case AF_INET:
3777                 {
3778                         struct sockaddr_in *sin;
3779
3780                         sin = (struct sockaddr_in *)newaddr;
3781                         if (sin->sin_addr.s_addr == 0) {
3782                                 /* Invalid address */
3783                                 return (-1);
3784                         }
3785                         /* zero out the bzero area */
3786                         memset(&sin->sin_zero, 0, sizeof(sin->sin_zero));
3787
3788                         /* assure len is set */
3789                         sin->sin_len = sizeof(struct sockaddr_in);
3790                         if (set_scope) {
3791 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE
3792                                 stcb->asoc.scope.ipv4_local_scope = 1;
3793 #else
3794                                 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) {
3795                                         stcb->asoc.scope.ipv4_local_scope = 1;
3796                                 }
3797 #endif                          /* SCTP_DONT_DO_PRIVADDR_SCOPE */
3798                         } else {
3799                                 /* Validate the address is in scope */
3800                                 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) &&
3801                                     (stcb->asoc.scope.ipv4_local_scope == 0)) {
3802                                         addr_inscope = 0;
3803                                 }
3804                         }
3805                         break;
3806                 }
3807 #endif
3808 #ifdef INET6
3809         case AF_INET6:
3810                 {
3811                         struct sockaddr_in6 *sin6;
3812
3813                         sin6 = (struct sockaddr_in6 *)newaddr;
3814                         if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
3815                                 /* Invalid address */
3816                                 return (-1);
3817                         }
3818                         /* assure len is set */
3819                         sin6->sin6_len = sizeof(struct sockaddr_in6);
3820                         if (set_scope) {
3821                                 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) {
3822                                         stcb->asoc.scope.loopback_scope = 1;
3823                                         stcb->asoc.scope.local_scope = 0;
3824                                         stcb->asoc.scope.ipv4_local_scope = 1;
3825                                         stcb->asoc.scope.site_scope = 1;
3826                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
3827                                         /*
3828                                          * If the new destination is a
3829                                          * LINK_LOCAL we must have common
3830                                          * site scope. Don't set the local
3831                                          * scope since we may not share all
3832                                          * links, only loopback can do this.
3833                                          * Links on the local network would
3834                                          * also be on our private network
3835                                          * for v4 too.
3836                                          */
3837                                         stcb->asoc.scope.ipv4_local_scope = 1;
3838                                         stcb->asoc.scope.site_scope = 1;
3839                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) {
3840                                         /*
3841                                          * If the new destination is
3842                                          * SITE_LOCAL then we must have site
3843                                          * scope in common.
3844                                          */
3845                                         stcb->asoc.scope.site_scope = 1;
3846                                 }
3847                         } else {
3848                                 /* Validate the address is in scope */
3849                                 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) &&
3850                                     (stcb->asoc.scope.loopback_scope == 0)) {
3851                                         addr_inscope = 0;
3852                                 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
3853                                     (stcb->asoc.scope.local_scope == 0)) {
3854                                         addr_inscope = 0;
3855                                 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
3856                                     (stcb->asoc.scope.site_scope == 0)) {
3857                                         addr_inscope = 0;
3858                                 }
3859                         }
3860                         break;
3861                 }
3862 #endif
3863         default:
3864                 /* not supported family type */
3865                 return (-1);
3866         }
3867         net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets);
3868         if (net == NULL) {
3869                 return (-1);
3870         }
3871         SCTP_INCR_RADDR_COUNT();
3872         bzero(net, sizeof(struct sctp_nets));
3873         (void)SCTP_GETTIME_TIMEVAL(&net->start_time);
3874         memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len);
3875         switch (newaddr->sa_family) {
3876 #ifdef INET
3877         case AF_INET:
3878                 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport;
3879                 break;
3880 #endif
3881 #ifdef INET6
3882         case AF_INET6:
3883                 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport;
3884                 break;
3885 #endif
3886         default:
3887                 break;
3888         }
3889         net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id);
3890         if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) {
3891                 stcb->asoc.scope.loopback_scope = 1;
3892                 stcb->asoc.scope.ipv4_local_scope = 1;
3893                 stcb->asoc.scope.local_scope = 0;
3894                 stcb->asoc.scope.site_scope = 1;
3895                 addr_inscope = 1;
3896         }
3897         net->failure_threshold = stcb->asoc.def_net_failure;
3898         net->pf_threshold = stcb->asoc.def_net_pf_threshold;
3899         if (addr_inscope == 0) {
3900                 net->dest_state = (SCTP_ADDR_REACHABLE |
3901                     SCTP_ADDR_OUT_OF_SCOPE);
3902         } else {
3903                 if (from == SCTP_ADDR_IS_CONFIRMED)
3904                         /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */
3905                         net->dest_state = SCTP_ADDR_REACHABLE;
3906                 else
3907                         net->dest_state = SCTP_ADDR_REACHABLE |
3908                             SCTP_ADDR_UNCONFIRMED;
3909         }
3910         /*
3911          * We set this to 0, the timer code knows that this means its an
3912          * initial value
3913          */
3914         net->rto_needed = 1;
3915         net->RTO = 0;
3916         net->RTO_measured = 0;
3917         stcb->asoc.numnets++;
3918         net->ref_count = 1;
3919         net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1;
3920         net->port = stcb->asoc.port;
3921         net->dscp = stcb->asoc.default_dscp;
3922 #ifdef INET6
3923         net->flowlabel = stcb->asoc.default_flowlabel;
3924 #endif
3925         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) {
3926                 net->dest_state |= SCTP_ADDR_NOHB;
3927         } else {
3928                 net->dest_state &= ~SCTP_ADDR_NOHB;
3929         }
3930         if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) {
3931                 net->dest_state |= SCTP_ADDR_NO_PMTUD;
3932         } else {
3933                 net->dest_state &= ~SCTP_ADDR_NO_PMTUD;
3934         }
3935         net->heart_beat_delay = stcb->asoc.heart_beat_delay;
3936         /* Init the timer structure */
3937         SCTP_OS_TIMER_INIT(&net->rxt_timer.timer);
3938         SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer);
3939         SCTP_OS_TIMER_INIT(&net->hb_timer.timer);
3940
3941         /* Now generate a route for this guy */
3942 #ifdef INET6
3943         /* KAME hack: embed scopeid */
3944         if (newaddr->sa_family == AF_INET6) {
3945                 struct sockaddr_in6 *sin6;
3946
3947                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
3948                 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone));
3949                 sin6->sin6_scope_id = 0;
3950         }
3951 #endif
3952         SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id);
3953
3954         if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) {
3955                 /* Get source address */
3956                 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep,
3957                     stcb,
3958                     (sctp_route_t *) & net->ro,
3959                     net,
3960                     0,
3961                     stcb->asoc.vrf_id);
3962                 if (net->ro._s_addr != NULL) {
3963                         net->src_addr_selected = 1;
3964                         /* Now get the interface MTU */
3965                         if (net->ro._s_addr->ifn_p != NULL) {
3966                                 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p);
3967                         }
3968                 } else {
3969                         net->src_addr_selected = 0;
3970                 }
3971                 if (net->mtu > 0) {
3972                         uint32_t rmtu;
3973
3974                         rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt);
3975                         if (rmtu == 0) {
3976                                 /*
3977                                  * Start things off to match mtu of
3978                                  * interface please.
3979                                  */
3980                                 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa,
3981                                     net->ro.ro_rt, net->mtu);
3982                         } else {
3983                                 /*
3984                                  * we take the route mtu over the interface,
3985                                  * since the route may be leading out the
3986                                  * loopback, or a different interface.
3987                                  */
3988                                 net->mtu = rmtu;
3989                         }
3990                 }
3991         } else {
3992                 net->src_addr_selected = 0;
3993         }
3994         if (net->mtu == 0) {
3995                 switch (newaddr->sa_family) {
3996 #ifdef INET
3997                 case AF_INET:
3998                         net->mtu = SCTP_DEFAULT_MTU;
3999                         break;
4000 #endif
4001 #ifdef INET6
4002                 case AF_INET6:
4003                         net->mtu = 1280;
4004                         break;
4005 #endif
4006                 default:
4007                         break;
4008                 }
4009         }
4010 #if defined(INET) || defined(INET6)
4011         if (net->port) {
4012                 net->mtu -= (uint32_t) sizeof(struct udphdr);
4013         }
4014 #endif
4015         if (from == SCTP_ALLOC_ASOC) {
4016                 stcb->asoc.smallest_mtu = net->mtu;
4017         }
4018         if (stcb->asoc.smallest_mtu > net->mtu) {
4019                 stcb->asoc.smallest_mtu = net->mtu;
4020         }
4021 #ifdef INET6
4022         if (newaddr->sa_family == AF_INET6) {
4023                 struct sockaddr_in6 *sin6;
4024
4025                 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr;
4026                 (void)sa6_recoverscope(sin6);
4027         }
4028 #endif
4029
4030         /* JRS - Use the congestion control given in the CC module */
4031         if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL)
4032                 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net);
4033
4034         /*
4035          * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning
4036          * of assoc (2005/06/27, iyengar@cis.udel.edu)
4037          */
4038         net->find_pseudo_cumack = 1;
4039         net->find_rtx_pseudo_cumack = 1;
4040         /* Choose an initial flowid. */
4041         net->flowid = stcb->asoc.my_vtag ^
4042             ntohs(stcb->rport) ^
4043             ntohs(stcb->sctp_ep->sctp_lport);
4044         net->flowtype = M_HASHTYPE_OPAQUE;
4045         if (netp) {
4046                 *netp = net;
4047         }
4048         netfirst = TAILQ_FIRST(&stcb->asoc.nets);
4049         if (net->ro.ro_rt == NULL) {
4050                 /* Since we have no route put it at the back */
4051                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4052         } else if (netfirst == NULL) {
4053                 /* We are the first one in the pool. */
4054                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4055         } else if (netfirst->ro.ro_rt == NULL) {
4056                 /*
4057                  * First one has NO route. Place this one ahead of the first
4058                  * one.
4059                  */
4060                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4061         } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) {
4062                 /*
4063                  * This one has a different interface than the one at the
4064                  * top of the list. Place it ahead.
4065                  */
4066                 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next);
4067         } else {
4068                 /*
4069                  * Ok we have the same interface as the first one. Move
4070                  * forward until we find either a) one with a NULL route...
4071                  * insert ahead of that b) one with a different ifp.. insert
4072                  * after that. c) end of the list.. insert at the tail.
4073                  */
4074                 struct sctp_nets *netlook;
4075
4076                 do {
4077                         netlook = TAILQ_NEXT(netfirst, sctp_next);
4078                         if (netlook == NULL) {
4079                                 /* End of the list */
4080                                 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next);
4081                                 break;
4082                         } else if (netlook->ro.ro_rt == NULL) {
4083                                 /* next one has NO route */
4084                                 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next);
4085                                 break;
4086                         } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) {
4087                                 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook,
4088                                     net, sctp_next);
4089                                 break;
4090                         }
4091                         /* Shift forward */
4092                         netfirst = netlook;
4093                 } while (netlook != NULL);
4094         }
4095
4096         /* got to have a primary set */
4097         if (stcb->asoc.primary_destination == 0) {
4098                 stcb->asoc.primary_destination = net;
4099         } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) &&
4100                     (net->ro.ro_rt) &&
4101             ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) {
4102                 /* No route to current primary adopt new primary */
4103                 stcb->asoc.primary_destination = net;
4104         }
4105         /* Validate primary is first */
4106         net = TAILQ_FIRST(&stcb->asoc.nets);
4107         if ((net != stcb->asoc.primary_destination) &&
4108             (stcb->asoc.primary_destination)) {
4109                 /*
4110                  * first one on the list is NOT the primary sctp_cmpaddr()
4111                  * is much more efficient if the primary is the first on the
4112                  * list, make it so.
4113                  */
4114                 TAILQ_REMOVE(&stcb->asoc.nets,
4115                     stcb->asoc.primary_destination, sctp_next);
4116                 TAILQ_INSERT_HEAD(&stcb->asoc.nets,
4117                     stcb->asoc.primary_destination, sctp_next);
4118         }
4119         return (0);
4120 }
4121
4122
4123 static uint32_t
4124 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb)
4125 {
4126         uint32_t id;
4127         struct sctpasochead *head;
4128         struct sctp_tcb *lstcb;
4129
4130         SCTP_INP_WLOCK(inp);
4131 try_again:
4132         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
4133                 /* TSNH */
4134                 SCTP_INP_WUNLOCK(inp);
4135                 return (0);
4136         }
4137         /*
4138          * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC,
4139          * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC.
4140          */
4141         if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) {
4142                 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1;
4143         }
4144         id = inp->sctp_associd_counter;
4145         inp->sctp_associd_counter++;
4146         lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0);
4147         if (lstcb) {
4148                 goto try_again;
4149         }
4150         head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)];
4151         LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash);
4152         stcb->asoc.in_asocid_hash = 1;
4153         SCTP_INP_WUNLOCK(inp);
4154         return id;
4155 }
4156
4157 /*
4158  * allocate an association and add it to the endpoint. The caller must be
4159  * careful to add all additional addresses once they are know right away or
4160  * else the assoc will be may experience a blackout scenario.
4161  */
4162 struct sctp_tcb *
4163 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr,
4164     int *error, uint32_t override_tag, uint32_t vrf_id,
4165     struct thread *p
4166 )
4167 {
4168         /* note the p argument is only valid in unbound sockets */
4169
4170         struct sctp_tcb *stcb;
4171         struct sctp_association *asoc;
4172         struct sctpasochead *head;
4173         uint16_t rport;
4174         int err;
4175
4176         /*
4177          * Assumption made here: Caller has done a
4178          * sctp_findassociation_ep_addr(ep, addr's); to make sure the
4179          * address does not exist already.
4180          */
4181         if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) {
4182                 /* Hit max assoc, sorry no more */
4183                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4184                 *error = ENOBUFS;
4185                 return (NULL);
4186         }
4187         if (firstaddr == NULL) {
4188                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4189                 *error = EINVAL;
4190                 return (NULL);
4191         }
4192         SCTP_INP_RLOCK(inp);
4193         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) &&
4194             ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) ||
4195             (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
4196                 /*
4197                  * If its in the TCP pool, its NOT allowed to create an
4198                  * association. The parent listener needs to call
4199                  * sctp_aloc_assoc.. or the one-2-many socket. If a peeled
4200                  * off, or connected one does this.. its an error.
4201                  */
4202                 SCTP_INP_RUNLOCK(inp);
4203                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4204                 *error = EINVAL;
4205                 return (NULL);
4206         }
4207         if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
4208             (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) {
4209                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) ||
4210                     (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) {
4211                         SCTP_INP_RUNLOCK(inp);
4212                         SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4213                         *error = EINVAL;
4214                         return (NULL);
4215                 }
4216         }
4217         SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:");
4218 #ifdef SCTP_DEBUG
4219         if (firstaddr) {
4220                 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr);
4221                 switch (firstaddr->sa_family) {
4222 #ifdef INET
4223                 case AF_INET:
4224                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4225                             ntohs(((struct sockaddr_in *)firstaddr)->sin_port));
4226                         break;
4227 #endif
4228 #ifdef INET6
4229                 case AF_INET6:
4230                         SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n",
4231                             ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port));
4232                         break;
4233 #endif
4234                 default:
4235                         break;
4236                 }
4237         } else {
4238                 SCTPDBG(SCTP_DEBUG_PCB3, "None\n");
4239         }
4240 #endif                          /* SCTP_DEBUG */
4241         switch (firstaddr->sa_family) {
4242 #ifdef INET
4243         case AF_INET:
4244                 {
4245                         struct sockaddr_in *sin;
4246
4247                         sin = (struct sockaddr_in *)firstaddr;
4248                         if ((ntohs(sin->sin_port) == 0) ||
4249                             (sin->sin_addr.s_addr == INADDR_ANY) ||
4250                             (sin->sin_addr.s_addr == INADDR_BROADCAST) ||
4251                             IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
4252                                 /* Invalid address */
4253                                 SCTP_INP_RUNLOCK(inp);
4254                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4255                                 *error = EINVAL;
4256                                 return (NULL);
4257                         }
4258                         rport = sin->sin_port;
4259                         break;
4260                 }
4261 #endif
4262 #ifdef INET6
4263         case AF_INET6:
4264                 {
4265                         struct sockaddr_in6 *sin6;
4266
4267                         sin6 = (struct sockaddr_in6 *)firstaddr;
4268                         if ((ntohs(sin6->sin6_port) == 0) ||
4269                             IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
4270                             IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
4271                                 /* Invalid address */
4272                                 SCTP_INP_RUNLOCK(inp);
4273                                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4274                                 *error = EINVAL;
4275                                 return (NULL);
4276                         }
4277                         rport = sin6->sin6_port;
4278                         break;
4279                 }
4280 #endif
4281         default:
4282                 /* not supported family type */
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         SCTP_INP_RUNLOCK(inp);
4289         if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
4290                 /*
4291                  * If you have not performed a bind, then we need to do the
4292                  * ephemeral bind for you.
4293                  */
4294                 if ((err = sctp_inpcb_bind(inp->sctp_socket,
4295                     (struct sockaddr *)NULL,
4296                     (struct sctp_ifa *)NULL,
4297                     p
4298                     ))) {
4299                         /* bind error, probably perm */
4300                         *error = err;
4301                         return (NULL);
4302                 }
4303         }
4304         stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb);
4305         if (stcb == NULL) {
4306                 /* out of memory? */
4307                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
4308                 *error = ENOMEM;
4309                 return (NULL);
4310         }
4311         SCTP_INCR_ASOC_COUNT();
4312
4313         bzero(stcb, sizeof(*stcb));
4314         asoc = &stcb->asoc;
4315
4316         asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb);
4317         SCTP_TCB_LOCK_INIT(stcb);
4318         SCTP_TCB_SEND_LOCK_INIT(stcb);
4319         stcb->rport = rport;
4320         /* setup back pointer's */
4321         stcb->sctp_ep = inp;
4322         stcb->sctp_socket = inp->sctp_socket;
4323         if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) {
4324                 /* failed */
4325                 SCTP_TCB_LOCK_DESTROY(stcb);
4326                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4327                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4328                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4329                 SCTP_DECR_ASOC_COUNT();
4330                 *error = err;
4331                 return (NULL);
4332         }
4333         /* and the port */
4334         SCTP_INP_INFO_WLOCK();
4335         SCTP_INP_WLOCK(inp);
4336         if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
4337                 /* inpcb freed while alloc going on */
4338                 SCTP_TCB_LOCK_DESTROY(stcb);
4339                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4340                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4341                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4342                 SCTP_INP_WUNLOCK(inp);
4343                 SCTP_INP_INFO_WUNLOCK();
4344                 SCTP_DECR_ASOC_COUNT();
4345                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
4346                 *error = EINVAL;
4347                 return (NULL);
4348         }
4349         SCTP_TCB_LOCK(stcb);
4350
4351         /* now that my_vtag is set, add it to the hash */
4352         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))];
4353         /* put it in the bucket in the vtag hash of assoc's for the system */
4354         LIST_INSERT_HEAD(head, stcb, sctp_asocs);
4355         SCTP_INP_INFO_WUNLOCK();
4356
4357         if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) {
4358                 /* failure.. memory error? */
4359                 if (asoc->strmout) {
4360                         SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
4361                         asoc->strmout = NULL;
4362                 }
4363                 if (asoc->mapping_array) {
4364                         SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
4365                         asoc->mapping_array = NULL;
4366                 }
4367                 if (asoc->nr_mapping_array) {
4368                         SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
4369                         asoc->nr_mapping_array = NULL;
4370                 }
4371                 SCTP_DECR_ASOC_COUNT();
4372                 SCTP_TCB_UNLOCK(stcb);
4373                 SCTP_TCB_LOCK_DESTROY(stcb);
4374                 SCTP_TCB_SEND_LOCK_DESTROY(stcb);
4375                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4376                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
4377                 SCTP_INP_WUNLOCK(inp);
4378                 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS);
4379                 *error = ENOBUFS;
4380                 return (NULL);
4381         }
4382         /* Init all the timers */
4383         SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer);
4384         SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer);
4385         SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer);
4386         SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer);
4387         SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer);
4388         SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer);
4389         SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer);
4390
4391         LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist);
4392         /* now file the port under the hash as well */
4393         if (inp->sctp_tcbhash != NULL) {
4394                 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport,
4395                     inp->sctp_hashmark)];
4396                 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash);
4397         }
4398         SCTP_INP_WUNLOCK(inp);
4399         SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb);
4400         return (stcb);
4401 }
4402
4403
4404 void
4405 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net)
4406 {
4407         struct sctp_association *asoc;
4408
4409         asoc = &stcb->asoc;
4410         asoc->numnets--;
4411         TAILQ_REMOVE(&asoc->nets, net, sctp_next);
4412         if (net == asoc->primary_destination) {
4413                 /* Reset primary */
4414                 struct sctp_nets *lnet;
4415
4416                 lnet = TAILQ_FIRST(&asoc->nets);
4417                 /*
4418                  * Mobility adaptation Ideally, if deleted destination is
4419                  * the primary, it becomes a fast retransmission trigger by
4420                  * the subsequent SET PRIMARY. (by micchie)
4421                  */
4422                 if (sctp_is_mobility_feature_on(stcb->sctp_ep,
4423                     SCTP_MOBILITY_BASE) ||
4424                     sctp_is_mobility_feature_on(stcb->sctp_ep,
4425                     SCTP_MOBILITY_FASTHANDOFF)) {
4426                         SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n");
4427                         if (asoc->deleted_primary != NULL) {
4428                                 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n");
4429                                 goto out;
4430                         }
4431                         asoc->deleted_primary = net;
4432                         atomic_add_int(&net->ref_count, 1);
4433                         memset(&net->lastsa, 0, sizeof(net->lastsa));
4434                         memset(&net->lastsv, 0, sizeof(net->lastsv));
4435                         sctp_mobility_feature_on(stcb->sctp_ep,
4436                             SCTP_MOBILITY_PRIM_DELETED);
4437                         sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED,
4438                             stcb->sctp_ep, stcb, NULL);
4439                 }
4440 out:
4441                 /* Try to find a confirmed primary */
4442                 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0);
4443         }
4444         if (net == asoc->last_data_chunk_from) {
4445                 /* Reset primary */
4446                 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets);
4447         }
4448         if (net == asoc->last_control_chunk_from) {
4449                 /* Clear net */
4450                 asoc->last_control_chunk_from = NULL;
4451         }
4452         if (net == stcb->asoc.alternate) {
4453                 sctp_free_remote_addr(stcb->asoc.alternate);
4454                 stcb->asoc.alternate = NULL;
4455         }
4456         sctp_free_remote_addr(net);
4457 }
4458
4459 /*
4460  * remove a remote endpoint address from an association, it will fail if the
4461  * address does not exist.
4462  */
4463 int
4464 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr)
4465 {
4466         /*
4467          * Here we need to remove a remote address. This is quite simple, we
4468          * first find it in the list of address for the association
4469          * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE
4470          * on that item. Note we do not allow it to be removed if there are
4471          * no other addresses.
4472          */
4473         struct sctp_association *asoc;
4474         struct sctp_nets *net, *nnet;
4475
4476         asoc = &stcb->asoc;
4477
4478         /* locate the address */
4479         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
4480                 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) {
4481                         continue;
4482                 }
4483                 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr,
4484                     remaddr)) {
4485                         /* we found the guy */
4486                         if (asoc->numnets < 2) {
4487                                 /* Must have at LEAST two remote addresses */
4488                                 return (-1);
4489                         } else {
4490                                 sctp_remove_net(stcb, net);
4491                                 return (0);
4492                         }
4493                 }
4494         }
4495         /* not found. */
4496         return (-2);
4497 }
4498
4499 void
4500 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4501 {
4502         struct sctpvtaghead *chain;
4503         struct sctp_tagblock *twait_block;
4504         int found = 0;
4505         int i;
4506
4507         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4508         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4509                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4510                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4511                             (twait_block->vtag_block[i].lport == lport) &&
4512                             (twait_block->vtag_block[i].rport == rport)) {
4513                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4514                                 twait_block->vtag_block[i].v_tag = 0;
4515                                 twait_block->vtag_block[i].lport = 0;
4516                                 twait_block->vtag_block[i].rport = 0;
4517                                 found = 1;
4518                                 break;
4519                         }
4520                 }
4521                 if (found)
4522                         break;
4523         }
4524 }
4525
4526 int
4527 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport)
4528 {
4529         struct sctpvtaghead *chain;
4530         struct sctp_tagblock *twait_block;
4531         int found = 0;
4532         int i;
4533
4534         SCTP_INP_INFO_WLOCK();
4535         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4536         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4537                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4538                         if ((twait_block->vtag_block[i].v_tag == tag) &&
4539                             (twait_block->vtag_block[i].lport == lport) &&
4540                             (twait_block->vtag_block[i].rport == rport)) {
4541                                 found = 1;
4542                                 break;
4543                         }
4544                 }
4545                 if (found)
4546                         break;
4547         }
4548         SCTP_INP_INFO_WUNLOCK();
4549         return (found);
4550 }
4551
4552
4553 void
4554 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport)
4555 {
4556         struct sctpvtaghead *chain;
4557         struct sctp_tagblock *twait_block;
4558         struct timeval now;
4559         int set, i;
4560
4561         if (time == 0) {
4562                 /* Its disabled */
4563                 return;
4564         }
4565         (void)SCTP_GETTIME_TIMEVAL(&now);
4566         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
4567         set = 0;
4568         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
4569                 /* Block(s) present, lets find space, and expire on the fly */
4570                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
4571                         if ((twait_block->vtag_block[i].v_tag == 0) &&
4572                             !set) {
4573                                 twait_block->vtag_block[i].tv_sec_at_expire =
4574                                     now.tv_sec + time;
4575                                 twait_block->vtag_block[i].v_tag = tag;
4576                                 twait_block->vtag_block[i].lport = lport;
4577                                 twait_block->vtag_block[i].rport = rport;
4578                                 set = 1;
4579                         } else if ((twait_block->vtag_block[i].v_tag) &&
4580                             ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) {
4581                                 /* Audit expires this guy */
4582                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
4583                                 twait_block->vtag_block[i].v_tag = 0;
4584                                 twait_block->vtag_block[i].lport = 0;
4585                                 twait_block->vtag_block[i].rport = 0;
4586                                 if (set == 0) {
4587                                         /* Reuse it for my new tag */
4588                                         twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time;
4589                                         twait_block->vtag_block[i].v_tag = tag;
4590                                         twait_block->vtag_block[i].lport = lport;
4591                                         twait_block->vtag_block[i].rport = rport;
4592                                         set = 1;
4593                                 }
4594                         }
4595                 }
4596                 if (set) {
4597                         /*
4598                          * We only do up to the block where we can place our
4599                          * tag for audits
4600                          */
4601                         break;
4602                 }
4603         }
4604         /* Need to add a new block to chain */
4605         if (!set) {
4606                 SCTP_MALLOC(twait_block, struct sctp_tagblock *,
4607                     sizeof(struct sctp_tagblock), SCTP_M_TIMW);
4608                 if (twait_block == NULL) {
4609 #ifdef INVARIANTS
4610                         panic("Can not alloc tagblock");
4611 #endif
4612                         return;
4613                 }
4614                 memset(twait_block, 0, sizeof(struct sctp_tagblock));
4615                 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock);
4616                 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time;
4617                 twait_block->vtag_block[0].v_tag = tag;
4618                 twait_block->vtag_block[0].lport = lport;
4619                 twait_block->vtag_block[0].rport = rport;
4620         }
4621 }
4622
4623
4624
4625 /*-
4626  * Free the association after un-hashing the remote port. This
4627  * function ALWAYS returns holding NO LOCK on the stcb. It DOES
4628  * expect that the input to this function IS a locked TCB.
4629  * It will return 0, if it did NOT destroy the association (instead
4630  * it unlocks it. It will return NON-zero if it either destroyed the
4631  * association OR the association is already destroyed.
4632  */
4633 int
4634 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location)
4635 {
4636         int i;
4637         struct sctp_association *asoc;
4638         struct sctp_nets *net, *nnet;
4639         struct sctp_laddr *laddr, *naddr;
4640         struct sctp_tmit_chunk *chk, *nchk;
4641         struct sctp_asconf_addr *aparam, *naparam;
4642         struct sctp_asconf_ack *aack, *naack;
4643         struct sctp_stream_reset_list *strrst, *nstrrst;
4644         struct sctp_queued_to_read *sq, *nsq;
4645         struct sctp_stream_queue_pending *sp, *nsp;
4646         sctp_sharedkey_t *shared_key, *nshared_key;
4647         struct socket *so;
4648
4649         /* first, lets purge the entry from the hash table. */
4650
4651 #ifdef SCTP_LOG_CLOSING
4652         sctp_log_closing(inp, stcb, 6);
4653 #endif
4654         if (stcb->asoc.state == 0) {
4655 #ifdef SCTP_LOG_CLOSING
4656                 sctp_log_closing(inp, NULL, 7);
4657 #endif
4658                 /* there is no asoc, really TSNH :-0 */
4659                 return (1);
4660         }
4661         if (stcb->asoc.alternate) {
4662                 sctp_free_remote_addr(stcb->asoc.alternate);
4663                 stcb->asoc.alternate = NULL;
4664         }
4665         /* TEMP CODE */
4666         if (stcb->freed_from_where == 0) {
4667                 /* Only record the first place free happened from */
4668                 stcb->freed_from_where = from_location;
4669         }
4670         /* TEMP CODE */
4671
4672         asoc = &stcb->asoc;
4673         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4674             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4675                 /* nothing around */
4676                 so = NULL;
4677         else
4678                 so = inp->sctp_socket;
4679
4680         /*
4681          * We used timer based freeing if a reader or writer is in the way.
4682          * So we first check if we are actually being called from a timer,
4683          * if so we abort early if a reader or writer is still in the way.
4684          */
4685         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) &&
4686             (from_inpcbfree == SCTP_NORMAL_PROC)) {
4687                 /*
4688                  * is it the timer driving us? if so are the reader/writers
4689                  * gone?
4690                  */
4691                 if (stcb->asoc.refcnt) {
4692                         /* nope, reader or writer in the way */
4693                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4694                         /* no asoc destroyed */
4695                         SCTP_TCB_UNLOCK(stcb);
4696 #ifdef SCTP_LOG_CLOSING
4697                         sctp_log_closing(inp, stcb, 8);
4698 #endif
4699                         return (0);
4700                 }
4701         }
4702         /* now clean up any other timers */
4703         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4704         asoc->dack_timer.self = NULL;
4705         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4706         /*-
4707          * For stream reset we don't blast this unless
4708          * it is a str-reset timer, it might be the
4709          * free-asoc timer which we DON'T want to
4710          * disturb.
4711          */
4712         if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET)
4713                 asoc->strreset_timer.self = NULL;
4714         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4715         asoc->asconf_timer.self = NULL;
4716         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4717         asoc->autoclose_timer.self = NULL;
4718         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4719         asoc->shut_guard_timer.self = NULL;
4720         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4721         asoc->delayed_event_timer.self = NULL;
4722         /* Mobility adaptation */
4723         (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer);
4724         asoc->delete_prim_timer.self = NULL;
4725         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4726                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4727                 net->rxt_timer.self = NULL;
4728                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4729                 net->pmtu_timer.self = NULL;
4730                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4731                 net->hb_timer.self = NULL;
4732         }
4733         /* Now the read queue needs to be cleaned up (only once) */
4734         if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) {
4735                 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED;
4736                 SCTP_INP_READ_LOCK(inp);
4737                 TAILQ_FOREACH(sq, &inp->read_queue, next) {
4738                         if (sq->stcb == stcb) {
4739                                 sq->do_not_ref_stcb = 1;
4740                                 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
4741                                 /*
4742                                  * If there is no end, there never will be
4743                                  * now.
4744                                  */
4745                                 if (sq->end_added == 0) {
4746                                         /* Held for PD-API clear that. */
4747                                         sq->pdapi_aborted = 1;
4748                                         sq->held_length = 0;
4749                                         if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) {
4750                                                 /*
4751                                                  * Need to add a PD-API
4752                                                  * aborted indication.
4753                                                  * Setting the control_pdapi
4754                                                  * assures that it will be
4755                                                  * added right after this
4756                                                  * msg.
4757                                                  */
4758                                                 uint32_t strseq;
4759
4760                                                 stcb->asoc.control_pdapi = sq;
4761                                                 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn;
4762                                                 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION,
4763                                                     stcb,
4764                                                     SCTP_PARTIAL_DELIVERY_ABORTED,
4765                                                     (void *)&strseq,
4766                                                     SCTP_SO_LOCKED);
4767                                                 stcb->asoc.control_pdapi = NULL;
4768                                         }
4769                                 }
4770                                 /* Add an end to wake them */
4771                                 sq->end_added = 1;
4772                         }
4773                 }
4774                 SCTP_INP_READ_UNLOCK(inp);
4775                 if (stcb->block_entry) {
4776                         SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET);
4777                         stcb->block_entry->error = ECONNRESET;
4778                         stcb->block_entry = NULL;
4779                 }
4780         }
4781         if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) {
4782                 /*
4783                  * Someone holds a reference OR the socket is unaccepted
4784                  * yet.
4785                  */
4786                 if ((stcb->asoc.refcnt) ||
4787                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4788                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
4789                         stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4790                         sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4791                 }
4792                 SCTP_TCB_UNLOCK(stcb);
4793                 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4794                     (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4795                         /* nothing around */
4796                         so = NULL;
4797                 if (so) {
4798                         /* Wake any reader/writers */
4799                         sctp_sorwakeup(inp, so);
4800                         sctp_sowwakeup(inp, so);
4801                 }
4802 #ifdef SCTP_LOG_CLOSING
4803                 sctp_log_closing(inp, stcb, 9);
4804 #endif
4805                 /* no asoc destroyed */
4806                 return (0);
4807         }
4808 #ifdef SCTP_LOG_CLOSING
4809         sctp_log_closing(inp, stcb, 10);
4810 #endif
4811         /*
4812          * When I reach here, no others want to kill the assoc yet.. and I
4813          * own the lock. Now its possible an abort comes in when I do the
4814          * lock exchange below to grab all the locks to do the final take
4815          * out. to prevent this we increment the count, which will start a
4816          * timer and blow out above thus assuring us that we hold exclusive
4817          * killing of the asoc. Note that after getting back the TCB lock we
4818          * will go ahead and increment the counter back up and stop any
4819          * timer a passing stranger may have started :-S
4820          */
4821         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4822                 atomic_add_int(&stcb->asoc.refcnt, 1);
4823
4824                 SCTP_TCB_UNLOCK(stcb);
4825                 SCTP_INP_INFO_WLOCK();
4826                 SCTP_INP_WLOCK(inp);
4827                 SCTP_TCB_LOCK(stcb);
4828         }
4829         /* Double check the GONE flag */
4830         if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
4831             (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE))
4832                 /* nothing around */
4833                 so = NULL;
4834
4835         if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
4836             (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
4837                 /*
4838                  * For TCP type we need special handling when we are
4839                  * connected. We also include the peel'ed off ones to.
4840                  */
4841                 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) {
4842                         inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED;
4843                         inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED;
4844                         if (so) {
4845                                 SOCK_LOCK(so);
4846                                 if (so->so_rcv.sb_cc == 0) {
4847                                         so->so_state &= ~(SS_ISCONNECTING |
4848                                             SS_ISDISCONNECTING |
4849                                             SS_ISCONFIRMING |
4850                                             SS_ISCONNECTED);
4851                                 }
4852                                 socantrcvmore_locked(so);
4853                                 sctp_sowwakeup(inp, so);
4854                                 sctp_sorwakeup(inp, so);
4855                                 SCTP_SOWAKEUP(so);
4856                         }
4857                 }
4858         }
4859         /*
4860          * Make it invalid too, that way if its about to run it will abort
4861          * and return.
4862          */
4863         /* re-increment the lock */
4864         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4865                 atomic_add_int(&stcb->asoc.refcnt, -1);
4866         }
4867         if (stcb->asoc.refcnt) {
4868                 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE;
4869                 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL);
4870                 if (from_inpcbfree == SCTP_NORMAL_PROC) {
4871                         SCTP_INP_INFO_WUNLOCK();
4872                         SCTP_INP_WUNLOCK(inp);
4873                 }
4874                 SCTP_TCB_UNLOCK(stcb);
4875                 return (0);
4876         }
4877         asoc->state = 0;
4878         if (inp->sctp_tcbhash) {
4879                 LIST_REMOVE(stcb, sctp_tcbhash);
4880         }
4881         if (stcb->asoc.in_asocid_hash) {
4882                 LIST_REMOVE(stcb, sctp_tcbasocidhash);
4883         }
4884         /* Now lets remove it from the list of ALL associations in the EP */
4885         LIST_REMOVE(stcb, sctp_tcblist);
4886         if (from_inpcbfree == SCTP_NORMAL_PROC) {
4887                 SCTP_INP_INCR_REF(inp);
4888                 SCTP_INP_WUNLOCK(inp);
4889         }
4890         /* pull from vtag hash */
4891         LIST_REMOVE(stcb, sctp_asocs);
4892         sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait),
4893             inp->sctp_lport, stcb->rport);
4894
4895         /*
4896          * Now restop the timers to be sure this is paranoia at is finest!
4897          */
4898         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4899         (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
4900         (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
4901         (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
4902         (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer);
4903         (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
4904         (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
4905         TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
4906                 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer);
4907                 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
4908                 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
4909         }
4910
4911         asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE;
4912         /*
4913          * The chunk lists and such SHOULD be empty but we check them just
4914          * in case.
4915          */
4916         /* anything on the wheel needs to be removed */
4917         for (i = 0; i < asoc->streamoutcnt; i++) {
4918                 struct sctp_stream_out *outs;
4919
4920                 outs = &asoc->strmout[i];
4921                 /* now clean up any chunks here */
4922                 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
4923                         TAILQ_REMOVE(&outs->outqueue, sp, next);
4924                         sctp_free_spbufspace(stcb, asoc, sp);
4925                         if (sp->data) {
4926                                 if (so) {
4927                                         /* Still an open socket - report */
4928                                         sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
4929                                             0, (void *)sp, SCTP_SO_LOCKED);
4930                                 }
4931                                 if (sp->data) {
4932                                         sctp_m_freem(sp->data);
4933                                         sp->data = NULL;
4934                                         sp->tail_mbuf = NULL;
4935                                         sp->length = 0;
4936                                 }
4937                         }
4938                         if (sp->net) {
4939                                 sctp_free_remote_addr(sp->net);
4940                                 sp->net = NULL;
4941                         }
4942                         sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED);
4943                 }
4944         }
4945         /* sa_ignore FREED_MEMORY */
4946         TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) {
4947                 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp);
4948                 SCTP_FREE(strrst, SCTP_M_STRESET);
4949         }
4950         TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) {
4951                 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next);
4952                 if (sq->data) {
4953                         sctp_m_freem(sq->data);
4954                         sq->data = NULL;
4955                 }
4956                 sctp_free_remote_addr(sq->whoFrom);
4957                 sq->whoFrom = NULL;
4958                 sq->stcb = NULL;
4959                 /* Free the ctl entry */
4960                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq);
4961                 SCTP_DECR_READQ_COUNT();
4962                 /* sa_ignore FREED_MEMORY */
4963         }
4964         TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) {
4965                 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next);
4966                 if (chk->data) {
4967                         sctp_m_freem(chk->data);
4968                         chk->data = NULL;
4969                 }
4970                 if (chk->holds_key_ref)
4971                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
4972                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
4973                 SCTP_DECR_CHK_COUNT();
4974                 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1);
4975                 asoc->free_chunk_cnt--;
4976                 /* sa_ignore FREED_MEMORY */
4977         }
4978         /* pending send queue SHOULD be empty */
4979         TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
4980                 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
4981                         asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
4982 #ifdef INVARIANTS
4983                 } else {
4984                         panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
4985 #endif
4986                 }
4987                 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
4988                 if (chk->data) {
4989                         if (so) {
4990                                 /* Still a socket? */
4991                                 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
4992                                     0, chk, SCTP_SO_LOCKED);
4993                         }
4994                         if (chk->data) {
4995                                 sctp_m_freem(chk->data);
4996                                 chk->data = NULL;
4997                         }
4998                 }
4999                 if (chk->holds_key_ref)
5000                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5001                 if (chk->whoTo) {
5002                         sctp_free_remote_addr(chk->whoTo);
5003                         chk->whoTo = NULL;
5004                 }
5005                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5006                 SCTP_DECR_CHK_COUNT();
5007                 /* sa_ignore FREED_MEMORY */
5008         }
5009         /* sent queue SHOULD be empty */
5010         TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
5011                 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) {
5012                         if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) {
5013                                 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--;
5014 #ifdef INVARIANTS
5015                         } else {
5016                                 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number);
5017 #endif
5018                         }
5019                 }
5020                 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
5021                 if (chk->data) {
5022                         if (so) {
5023                                 /* Still a socket? */
5024                                 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
5025                                     0, chk, SCTP_SO_LOCKED);
5026                         }
5027                         if (chk->data) {
5028                                 sctp_m_freem(chk->data);
5029                                 chk->data = NULL;
5030                         }
5031                 }
5032                 if (chk->holds_key_ref)
5033                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5034                 sctp_free_remote_addr(chk->whoTo);
5035                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5036                 SCTP_DECR_CHK_COUNT();
5037                 /* sa_ignore FREED_MEMORY */
5038         }
5039 #ifdef INVARIANTS
5040         for (i = 0; i < stcb->asoc.streamoutcnt; i++) {
5041                 if (stcb->asoc.strmout[i].chunks_on_queues > 0) {
5042                         panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i);
5043                 }
5044         }
5045 #endif
5046         /* control queue MAY not be empty */
5047         TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) {
5048                 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next);
5049                 if (chk->data) {
5050                         sctp_m_freem(chk->data);
5051                         chk->data = NULL;
5052                 }
5053                 if (chk->holds_key_ref)
5054                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5055                 sctp_free_remote_addr(chk->whoTo);
5056                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5057                 SCTP_DECR_CHK_COUNT();
5058                 /* sa_ignore FREED_MEMORY */
5059         }
5060         /* ASCONF queue MAY not be empty */
5061         TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) {
5062                 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next);
5063                 if (chk->data) {
5064                         sctp_m_freem(chk->data);
5065                         chk->data = NULL;
5066                 }
5067                 if (chk->holds_key_ref)
5068                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5069                 sctp_free_remote_addr(chk->whoTo);
5070                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5071                 SCTP_DECR_CHK_COUNT();
5072                 /* sa_ignore FREED_MEMORY */
5073         }
5074         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
5075                 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
5076                 if (chk->data) {
5077                         sctp_m_freem(chk->data);
5078                         chk->data = NULL;
5079                 }
5080                 if (chk->holds_key_ref)
5081                         sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED);
5082                 sctp_free_remote_addr(chk->whoTo);
5083                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk);
5084                 SCTP_DECR_CHK_COUNT();
5085                 /* sa_ignore FREED_MEMORY */
5086         }
5087
5088         if (asoc->mapping_array) {
5089                 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
5090                 asoc->mapping_array = NULL;
5091         }
5092         if (asoc->nr_mapping_array) {
5093                 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
5094                 asoc->nr_mapping_array = NULL;
5095         }
5096         /* the stream outs */
5097         if (asoc->strmout) {
5098                 SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
5099                 asoc->strmout = NULL;
5100         }
5101         asoc->strm_realoutsize = asoc->streamoutcnt = 0;
5102         if (asoc->strmin) {
5103                 struct sctp_queued_to_read *ctl, *nctl;
5104
5105                 for (i = 0; i < asoc->streamincnt; i++) {
5106                         TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) {
5107                                 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next);
5108                                 sctp_free_remote_addr(ctl->whoFrom);
5109                                 if (ctl->data) {
5110                                         sctp_m_freem(ctl->data);
5111                                         ctl->data = NULL;
5112                                 }
5113                                 /*
5114                                  * We don't free the address here since all
5115                                  * the net's were freed above.
5116                                  */
5117                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
5118                                 SCTP_DECR_READQ_COUNT();
5119                         }
5120                 }
5121                 SCTP_FREE(asoc->strmin, SCTP_M_STRMI);
5122                 asoc->strmin = NULL;
5123         }
5124         asoc->streamincnt = 0;
5125         TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) {
5126 #ifdef INVARIANTS
5127                 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) {
5128                         panic("no net's left alloc'ed, or list points to itself");
5129                 }
5130 #endif
5131                 TAILQ_REMOVE(&asoc->nets, net, sctp_next);
5132                 sctp_free_remote_addr(net);
5133         }
5134         LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) {
5135                 /* sa_ignore FREED_MEMORY */
5136                 sctp_remove_laddr(laddr);
5137         }
5138
5139         /* pending asconf (address) parameters */
5140         TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) {
5141                 /* sa_ignore FREED_MEMORY */
5142                 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next);
5143                 SCTP_FREE(aparam, SCTP_M_ASC_ADDR);
5144         }
5145         TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) {
5146                 /* sa_ignore FREED_MEMORY */
5147                 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next);
5148                 if (aack->data != NULL) {
5149                         sctp_m_freem(aack->data);
5150                 }
5151                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack);
5152         }
5153         /* clean up auth stuff */
5154         if (asoc->local_hmacs)
5155                 sctp_free_hmaclist(asoc->local_hmacs);
5156         if (asoc->peer_hmacs)
5157                 sctp_free_hmaclist(asoc->peer_hmacs);
5158
5159         if (asoc->local_auth_chunks)
5160                 sctp_free_chunklist(asoc->local_auth_chunks);
5161         if (asoc->peer_auth_chunks)
5162                 sctp_free_chunklist(asoc->peer_auth_chunks);
5163
5164         sctp_free_authinfo(&asoc->authinfo);
5165
5166         LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) {
5167                 LIST_REMOVE(shared_key, next);
5168                 sctp_free_sharedkey(shared_key);
5169                 /* sa_ignore FREED_MEMORY */
5170         }
5171
5172         /* Insert new items here :> */
5173
5174         /* Get rid of LOCK */
5175         SCTP_TCB_UNLOCK(stcb);
5176         SCTP_TCB_LOCK_DESTROY(stcb);
5177         SCTP_TCB_SEND_LOCK_DESTROY(stcb);
5178         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5179                 SCTP_INP_INFO_WUNLOCK();
5180                 SCTP_INP_RLOCK(inp);
5181         }
5182 #ifdef SCTP_TRACK_FREED_ASOCS
5183         if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5184                 /* now clean up the tasoc itself */
5185                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5186                 SCTP_DECR_ASOC_COUNT();
5187         } else {
5188                 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist);
5189         }
5190 #else
5191         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb);
5192         SCTP_DECR_ASOC_COUNT();
5193 #endif
5194         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5195                 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
5196                         /*
5197                          * If its NOT the inp_free calling us AND sctp_close
5198                          * as been called, we call back...
5199                          */
5200                         SCTP_INP_RUNLOCK(inp);
5201                         /*
5202                          * This will start the kill timer (if we are the
5203                          * last one) since we hold an increment yet. But
5204                          * this is the only safe way to do this since
5205                          * otherwise if the socket closes at the same time
5206                          * we are here we might collide in the cleanup.
5207                          */
5208                         sctp_inpcb_free(inp,
5209                             SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE,
5210                             SCTP_CALLED_DIRECTLY_NOCMPSET);
5211                         SCTP_INP_DECR_REF(inp);
5212                         goto out_of;
5213                 } else {
5214                         /* The socket is still open. */
5215                         SCTP_INP_DECR_REF(inp);
5216                 }
5217         }
5218         if (from_inpcbfree == SCTP_NORMAL_PROC) {
5219                 SCTP_INP_RUNLOCK(inp);
5220         }
5221 out_of:
5222         /* destroyed the asoc */
5223 #ifdef SCTP_LOG_CLOSING
5224         sctp_log_closing(inp, NULL, 11);
5225 #endif
5226         return (1);
5227 }
5228
5229
5230
5231 /*
5232  * determine if a destination is "reachable" based upon the addresses bound
5233  * to the current endpoint (e.g. only v4 or v6 currently bound)
5234  */
5235 /*
5236  * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use
5237  * assoc level v4/v6 flags, as the assoc *may* not have the same address
5238  * types bound as its endpoint
5239  */
5240 int
5241 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr)
5242 {
5243         struct sctp_inpcb *inp;
5244         int answer;
5245
5246         /*
5247          * No locks here, the TCB, in all cases is already locked and an
5248          * assoc is up. There is either a INP lock by the caller applied (in
5249          * asconf case when deleting an address) or NOT in the HB case,
5250          * however if HB then the INP increment is up and the INP will not
5251          * be removed (on top of the fact that we have a TCB lock). So we
5252          * only want to read the sctp_flags, which is either bound-all or
5253          * not.. no protection needed since once an assoc is up you can't be
5254          * changing your binding.
5255          */
5256         inp = stcb->sctp_ep;
5257         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5258                 /* if bound all, destination is not restricted */
5259                 /*
5260                  * RRS: Question during lock work: Is this correct? If you
5261                  * are bound-all you still might need to obey the V4--V6
5262                  * flags??? IMO this bound-all stuff needs to be removed!
5263                  */
5264                 return (1);
5265         }
5266         /* NOTE: all "scope" checks are done when local addresses are added */
5267         switch (destaddr->sa_family) {
5268 #ifdef INET6
5269         case AF_INET6:
5270                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6;
5271                 break;
5272 #endif
5273 #ifdef INET
5274         case AF_INET:
5275                 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4;
5276                 break;
5277 #endif
5278         default:
5279                 /* invalid family, so it's unreachable */
5280                 answer = 0;
5281                 break;
5282         }
5283         return (answer);
5284 }
5285
5286 /*
5287  * update the inp_vflags on an endpoint
5288  */
5289 static void
5290 sctp_update_ep_vflag(struct sctp_inpcb *inp)
5291 {
5292         struct sctp_laddr *laddr;
5293
5294         /* first clear the flag */
5295         inp->ip_inp.inp.inp_vflag = 0;
5296         /* set the flag based on addresses on the ep list */
5297         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5298                 if (laddr->ifa == NULL) {
5299                         SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n",
5300                             __FUNCTION__);
5301                         continue;
5302                 }
5303                 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) {
5304                         continue;
5305                 }
5306                 switch (laddr->ifa->address.sa.sa_family) {
5307 #ifdef INET6
5308                 case AF_INET6:
5309                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5310                         break;
5311 #endif
5312 #ifdef INET
5313                 case AF_INET:
5314                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5315                         break;
5316 #endif
5317                 default:
5318                         break;
5319                 }
5320         }
5321 }
5322
5323 /*
5324  * Add the address to the endpoint local address list There is nothing to be
5325  * done if we are bound to all addresses
5326  */
5327 void
5328 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action)
5329 {
5330         struct sctp_laddr *laddr;
5331         int fnd, error = 0;
5332
5333         fnd = 0;
5334
5335         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5336                 /* You are already bound to all. You have it already */
5337                 return;
5338         }
5339 #ifdef INET6
5340         if (ifa->address.sa.sa_family == AF_INET6) {
5341                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5342                         /* Can't bind a non-useable addr. */
5343                         return;
5344                 }
5345         }
5346 #endif
5347         /* first, is it already present? */
5348         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5349                 if (laddr->ifa == ifa) {
5350                         fnd = 1;
5351                         break;
5352                 }
5353         }
5354
5355         if (fnd == 0) {
5356                 /* Not in the ep list */
5357                 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action);
5358                 if (error != 0)
5359                         return;
5360                 inp->laddr_count++;
5361                 /* update inp_vflag flags */
5362                 switch (ifa->address.sa.sa_family) {
5363 #ifdef INET6
5364                 case AF_INET6:
5365                         inp->ip_inp.inp.inp_vflag |= INP_IPV6;
5366                         break;
5367 #endif
5368 #ifdef INET
5369                 case AF_INET:
5370                         inp->ip_inp.inp.inp_vflag |= INP_IPV4;
5371                         break;
5372 #endif
5373                 default:
5374                         break;
5375                 }
5376         }
5377         return;
5378 }
5379
5380
5381 /*
5382  * select a new (hopefully reachable) destination net (should only be used
5383  * when we deleted an ep addr that is the only usable source address to reach
5384  * the destination net)
5385  */
5386 static void
5387 sctp_select_primary_destination(struct sctp_tcb *stcb)
5388 {
5389         struct sctp_nets *net;
5390
5391         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5392                 /* for now, we'll just pick the first reachable one we find */
5393                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED)
5394                         continue;
5395                 if (sctp_destination_is_reachable(stcb,
5396                     (struct sockaddr *)&net->ro._l_addr)) {
5397                         /* found a reachable destination */
5398                         stcb->asoc.primary_destination = net;
5399                 }
5400         }
5401         /* I can't there from here! ...we're gonna die shortly... */
5402 }
5403
5404
5405 /*
5406  * Delete the address from the endpoint local address list There is nothing
5407  * to be done if we are bound to all addresses
5408  */
5409 void
5410 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa)
5411 {
5412         struct sctp_laddr *laddr;
5413         int fnd;
5414
5415         fnd = 0;
5416         if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
5417                 /* You are already bound to all. You have it already */
5418                 return;
5419         }
5420         LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
5421                 if (laddr->ifa == ifa) {
5422                         fnd = 1;
5423                         break;
5424                 }
5425         }
5426         if (fnd && (inp->laddr_count < 2)) {
5427                 /* can't delete unless there are at LEAST 2 addresses */
5428                 return;
5429         }
5430         if (fnd) {
5431                 /*
5432                  * clean up any use of this address go through our
5433                  * associations and clear any last_used_address that match
5434                  * this one for each assoc, see if a new primary_destination
5435                  * is needed
5436                  */
5437                 struct sctp_tcb *stcb;
5438
5439                 /* clean up "next_addr_touse" */
5440                 if (inp->next_addr_touse == laddr)
5441                         /* delete this address */
5442                         inp->next_addr_touse = NULL;
5443
5444                 /* clean up "last_used_address" */
5445                 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
5446                         struct sctp_nets *net;
5447
5448                         SCTP_TCB_LOCK(stcb);
5449                         if (stcb->asoc.last_used_address == laddr)
5450                                 /* delete this address */
5451                                 stcb->asoc.last_used_address = NULL;
5452                         /*
5453                          * Now spin through all the nets and purge any ref
5454                          * to laddr
5455                          */
5456                         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
5457                                 if (net->ro._s_addr &&
5458                                     (net->ro._s_addr->ifa == laddr->ifa)) {
5459                                         /* Yep, purge src address selected */
5460                                         sctp_rtentry_t *rt;
5461
5462                                         /* delete this address if cached */
5463                                         rt = net->ro.ro_rt;
5464                                         if (rt != NULL) {
5465                                                 RTFREE(rt);
5466                                                 net->ro.ro_rt = NULL;
5467                                         }
5468                                         sctp_free_ifa(net->ro._s_addr);
5469                                         net->ro._s_addr = NULL;
5470                                         net->src_addr_selected = 0;
5471                                 }
5472                         }
5473                         SCTP_TCB_UNLOCK(stcb);
5474                 }               /* for each tcb */
5475                 /* remove it from the ep list */
5476                 sctp_remove_laddr(laddr);
5477                 inp->laddr_count--;
5478                 /* update inp_vflag flags */
5479                 sctp_update_ep_vflag(inp);
5480         }
5481         return;
5482 }
5483
5484 /*
5485  * Add the address to the TCB local address restricted list.
5486  * This is a "pending" address list (eg. addresses waiting for an
5487  * ASCONF-ACK response) and cannot be used as a valid source address.
5488  */
5489 void
5490 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5491 {
5492         struct sctp_laddr *laddr;
5493         struct sctpladdr *list;
5494
5495         /*
5496          * Assumes TCB is locked.. and possibly the INP. May need to
5497          * confirm/fix that if we need it and is not the case.
5498          */
5499         list = &stcb->asoc.sctp_restricted_addrs;
5500
5501 #ifdef INET6
5502         if (ifa->address.sa.sa_family == AF_INET6) {
5503                 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) {
5504                         /* Can't bind a non-existent addr. */
5505                         return;
5506                 }
5507         }
5508 #endif
5509         /* does the address already exist? */
5510         LIST_FOREACH(laddr, list, sctp_nxt_addr) {
5511                 if (laddr->ifa == ifa) {
5512                         return;
5513                 }
5514         }
5515
5516         /* add to the list */
5517         (void)sctp_insert_laddr(list, ifa, 0);
5518         return;
5519 }
5520
5521 /*
5522  * insert an laddr entry with the given ifa for the desired list
5523  */
5524 int
5525 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act)
5526 {
5527         struct sctp_laddr *laddr;
5528
5529         laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
5530         if (laddr == NULL) {
5531                 /* out of memory? */
5532                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL);
5533                 return (EINVAL);
5534         }
5535         SCTP_INCR_LADDR_COUNT();
5536         bzero(laddr, sizeof(*laddr));
5537         (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time);
5538         laddr->ifa = ifa;
5539         laddr->action = act;
5540         atomic_add_int(&ifa->refcount, 1);
5541         /* insert it */
5542         LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr);
5543
5544         return (0);
5545 }
5546
5547 /*
5548  * Remove an laddr entry from the local address list (on an assoc)
5549  */
5550 void
5551 sctp_remove_laddr(struct sctp_laddr *laddr)
5552 {
5553
5554         /* remove from the list */
5555         LIST_REMOVE(laddr, sctp_nxt_addr);
5556         sctp_free_ifa(laddr->ifa);
5557         SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr);
5558         SCTP_DECR_LADDR_COUNT();
5559 }
5560
5561 /*
5562  * Remove a local address from the TCB local address restricted list
5563  */
5564 void
5565 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa)
5566 {
5567         struct sctp_inpcb *inp;
5568         struct sctp_laddr *laddr;
5569
5570         /*
5571          * This is called by asconf work. It is assumed that a) The TCB is
5572          * locked and b) The INP is locked. This is true in as much as I can
5573          * trace through the entry asconf code where I did these locks.
5574          * Again, the ASCONF code is a bit different in that it does lock
5575          * the INP during its work often times. This must be since we don't
5576          * want other proc's looking up things while what they are looking
5577          * up is changing :-D
5578          */
5579
5580         inp = stcb->sctp_ep;
5581         /* if subset bound and don't allow ASCONF's, can't delete last */
5582         if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) &&
5583             sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) {
5584                 if (stcb->sctp_ep->laddr_count < 2) {
5585                         /* can't delete last address */
5586                         return;
5587                 }
5588         }
5589         LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) {
5590                 /* remove the address if it exists */
5591                 if (laddr->ifa == NULL)
5592                         continue;
5593                 if (laddr->ifa == ifa) {
5594                         sctp_remove_laddr(laddr);
5595                         return;
5596                 }
5597         }
5598
5599         /* address not found! */
5600         return;
5601 }
5602
5603 /*
5604  * Temporarily remove for __APPLE__ until we use the Tiger equivalents
5605  */
5606 /* sysctl */
5607 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC;
5608 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR;
5609
5610
5611
5612 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5613 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL;
5614 int *sctp_cpuarry = NULL;
5615 void
5616 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use)
5617 {
5618         /* Queue a packet to a processor for the specified core */
5619         struct sctp_mcore_queue *qent;
5620         struct sctp_mcore_ctrl *wkq;
5621         int need_wake = 0;
5622
5623         if (sctp_mcore_workers == NULL) {
5624                 /* Something went way bad during setup */
5625                 sctp_input_with_port(m, off, 0);
5626                 return;
5627         }
5628         SCTP_MALLOC(qent, struct sctp_mcore_queue *,
5629             (sizeof(struct sctp_mcore_queue)),
5630             SCTP_M_MCORE);
5631         if (qent == NULL) {
5632                 /* This is trouble  */
5633                 sctp_input_with_port(m, off, 0);
5634                 return;
5635         }
5636         qent->vn = curvnet;
5637         qent->m = m;
5638         qent->off = off;
5639         qent->v6 = 0;
5640         wkq = &sctp_mcore_workers[cpu_to_use];
5641         SCTP_MCORE_QLOCK(wkq);
5642
5643         TAILQ_INSERT_TAIL(&wkq->que, qent, next);
5644         if (wkq->running == 0) {
5645                 need_wake = 1;
5646         }
5647         SCTP_MCORE_QUNLOCK(wkq);
5648         if (need_wake) {
5649                 wakeup(&wkq->running);
5650         }
5651 }
5652
5653 static void
5654 sctp_mcore_thread(void *arg)
5655 {
5656
5657         struct sctp_mcore_ctrl *wkq;
5658         struct sctp_mcore_queue *qent;
5659
5660         wkq = (struct sctp_mcore_ctrl *)arg;
5661         struct mbuf *m;
5662         int off, v6;
5663
5664         /* Wait for first tickle */
5665         SCTP_MCORE_LOCK(wkq);
5666         wkq->running = 0;
5667         msleep(&wkq->running,
5668             &wkq->core_mtx,
5669             0, "wait for pkt", 0);
5670         SCTP_MCORE_UNLOCK(wkq);
5671
5672         /* Bind to our cpu */
5673         thread_lock(curthread);
5674         sched_bind(curthread, wkq->cpuid);
5675         thread_unlock(curthread);
5676
5677         /* Now lets start working */
5678         SCTP_MCORE_LOCK(wkq);
5679         /* Now grab lock and go */
5680         for (;;) {
5681                 SCTP_MCORE_QLOCK(wkq);
5682 skip_sleep:
5683                 wkq->running = 1;
5684                 qent = TAILQ_FIRST(&wkq->que);
5685                 if (qent) {
5686                         TAILQ_REMOVE(&wkq->que, qent, next);
5687                         SCTP_MCORE_QUNLOCK(wkq);
5688                         CURVNET_SET(qent->vn);
5689                         m = qent->m;
5690                         off = qent->off;
5691                         v6 = qent->v6;
5692                         SCTP_FREE(qent, SCTP_M_MCORE);
5693                         if (v6 == 0) {
5694                                 sctp_input_with_port(m, off, 0);
5695                         } else {
5696                                 SCTP_PRINTF("V6 not yet supported\n");
5697                                 sctp_m_freem(m);
5698                         }
5699                         CURVNET_RESTORE();
5700                         SCTP_MCORE_QLOCK(wkq);
5701                 }
5702                 wkq->running = 0;
5703                 if (!TAILQ_EMPTY(&wkq->que)) {
5704                         goto skip_sleep;
5705                 }
5706                 SCTP_MCORE_QUNLOCK(wkq);
5707                 msleep(&wkq->running,
5708                     &wkq->core_mtx,
5709                     0, "wait for pkt", 0);
5710         }
5711 }
5712
5713 static void
5714 sctp_startup_mcore_threads(void)
5715 {
5716         int i, cpu;
5717
5718         if (mp_ncpus == 1)
5719                 return;
5720
5721         if (sctp_mcore_workers != NULL) {
5722                 /*
5723                  * Already been here in some previous vnet?
5724                  */
5725                 return;
5726         }
5727         SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *,
5728             ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)),
5729             SCTP_M_MCORE);
5730         if (sctp_mcore_workers == NULL) {
5731                 /* TSNH I hope */
5732                 return;
5733         }
5734         memset(sctp_mcore_workers, 0, ((mp_maxid + 1) *
5735             sizeof(struct sctp_mcore_ctrl)));
5736         /* Init the structures */
5737         for (i = 0; i <= mp_maxid; i++) {
5738                 TAILQ_INIT(&sctp_mcore_workers[i].que);
5739                 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]);
5740                 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]);
5741                 sctp_mcore_workers[i].cpuid = i;
5742         }
5743         if (sctp_cpuarry == NULL) {
5744                 SCTP_MALLOC(sctp_cpuarry, int *,
5745                     (mp_ncpus * sizeof(int)),
5746                     SCTP_M_MCORE);
5747                 i = 0;
5748                 CPU_FOREACH(cpu) {
5749                         sctp_cpuarry[i] = cpu;
5750                         i++;
5751                 }
5752         }
5753         /* Now start them all */
5754         CPU_FOREACH(cpu) {
5755                 (void)kproc_create(sctp_mcore_thread,
5756                     (void *)&sctp_mcore_workers[cpu],
5757                     &sctp_mcore_workers[cpu].thread_proc,
5758                     RFPROC,
5759                     SCTP_KTHREAD_PAGES,
5760                     SCTP_MCORE_NAME);
5761
5762         }
5763 }
5764
5765 #endif
5766
5767 void
5768 sctp_pcb_init()
5769 {
5770         /*
5771          * SCTP initialization for the PCB structures should be called by
5772          * the sctp_init() funciton.
5773          */
5774         int i;
5775         struct timeval tv;
5776
5777         if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) {
5778                 /* error I was called twice */
5779                 return;
5780         }
5781         SCTP_BASE_VAR(sctp_pcb_initialized) = 1;
5782
5783 #if defined(SCTP_LOCAL_TRACE_BUF)
5784         bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log));
5785 #endif
5786 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5787         SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *,
5788             ((mp_maxid + 1) * sizeof(struct sctpstat)),
5789             SCTP_M_MCORE);
5790 #endif
5791         (void)SCTP_GETTIME_TIMEVAL(&tv);
5792 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
5793         bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1)));
5794         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec;
5795         SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec;
5796 #else
5797         bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat));
5798         SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec;
5799         SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec;
5800 #endif
5801         /* init the empty list of (All) Endpoints */
5802         LIST_INIT(&SCTP_BASE_INFO(listhead));
5803
5804
5805         /* init the hash table of endpoints */
5806         TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize));
5807         TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize));
5808         TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale));
5809         SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31),
5810             &SCTP_BASE_INFO(hashasocmark));
5811         SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5812             &SCTP_BASE_INFO(hashmark));
5813         SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize),
5814             &SCTP_BASE_INFO(hashtcpmark));
5815         SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize);
5816
5817
5818         SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH,
5819             &SCTP_BASE_INFO(hashvrfmark));
5820
5821         SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE,
5822             &SCTP_BASE_INFO(vrf_ifn_hashmark));
5823         /* init the zones */
5824         /*
5825          * FIX ME: Should check for NULL returns, but if it does fail we are
5826          * doomed to panic anyways... add later maybe.
5827          */
5828         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep",
5829             sizeof(struct sctp_inpcb), maxsockets);
5830
5831         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc",
5832             sizeof(struct sctp_tcb), sctp_max_number_of_assoc);
5833
5834         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr",
5835             sizeof(struct sctp_laddr),
5836             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5837
5838         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr",
5839             sizeof(struct sctp_nets),
5840             (sctp_max_number_of_assoc * sctp_scale_up_for_address));
5841
5842         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk",
5843             sizeof(struct sctp_tmit_chunk),
5844             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5845
5846         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq",
5847             sizeof(struct sctp_queued_to_read),
5848             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5849
5850         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out",
5851             sizeof(struct sctp_stream_queue_pending),
5852             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5853
5854         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf",
5855             sizeof(struct sctp_asconf),
5856             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5857
5858         SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack",
5859             sizeof(struct sctp_asconf_ack),
5860             (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale)));
5861
5862
5863         /* Master Lock INIT for info structure */
5864         SCTP_INP_INFO_LOCK_INIT();
5865         SCTP_STATLOG_INIT_LOCK();
5866
5867         SCTP_IPI_COUNT_INIT();
5868         SCTP_IPI_ADDR_INIT();
5869 #ifdef SCTP_PACKET_LOGGING
5870         SCTP_IP_PKTLOG_INIT();
5871 #endif
5872         LIST_INIT(&SCTP_BASE_INFO(addr_wq));
5873
5874         SCTP_WQ_ADDR_INIT();
5875         /* not sure if we need all the counts */
5876         SCTP_BASE_INFO(ipi_count_ep) = 0;
5877         /* assoc/tcb zone info */
5878         SCTP_BASE_INFO(ipi_count_asoc) = 0;
5879         /* local addrlist zone info */
5880         SCTP_BASE_INFO(ipi_count_laddr) = 0;
5881         /* remote addrlist zone info */
5882         SCTP_BASE_INFO(ipi_count_raddr) = 0;
5883         /* chunk info */
5884         SCTP_BASE_INFO(ipi_count_chunk) = 0;
5885
5886         /* socket queue zone info */
5887         SCTP_BASE_INFO(ipi_count_readq) = 0;
5888
5889         /* stream out queue cont */
5890         SCTP_BASE_INFO(ipi_count_strmoq) = 0;
5891
5892         SCTP_BASE_INFO(ipi_free_strmoq) = 0;
5893         SCTP_BASE_INFO(ipi_free_chunks) = 0;
5894
5895         SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer));
5896
5897         /* Init the TIMEWAIT list */
5898         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5899                 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]);
5900         }
5901         sctp_startup_iterator();
5902
5903 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP)
5904         sctp_startup_mcore_threads();
5905 #endif
5906
5907         /*
5908          * INIT the default VRF which for BSD is the only one, other O/S's
5909          * may have more. But initially they must start with one and then
5910          * add the VRF's as addresses are added.
5911          */
5912         sctp_init_vrf_list(SCTP_DEFAULT_VRF);
5913 }
5914
5915 /*
5916  * Assumes that the SCTP_BASE_INFO() lock is NOT held.
5917  */
5918 void
5919 sctp_pcb_finish(void)
5920 {
5921         struct sctp_vrflist *vrf_bucket;
5922         struct sctp_vrf *vrf, *nvrf;
5923         struct sctp_ifn *ifn, *nifn;
5924         struct sctp_ifa *ifa, *nifa;
5925         struct sctpvtaghead *chain;
5926         struct sctp_tagblock *twait_block, *prev_twait_block;
5927         struct sctp_laddr *wi, *nwi;
5928         int i;
5929         struct sctp_iterator *it, *nit;
5930
5931         /*
5932          * In FreeBSD the iterator thread never exits but we do clean up.
5933          * The only way FreeBSD reaches here is if we have VRF's but we
5934          * still add the ifdef to make it compile on old versions.
5935          */
5936         SCTP_IPI_ITERATOR_WQ_LOCK();
5937         TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
5938                 if (it->vn != curvnet) {
5939                         continue;
5940                 }
5941                 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
5942                 if (it->function_atend != NULL) {
5943                         (*it->function_atend) (it->pointer, it->val);
5944                 }
5945                 SCTP_FREE(it, SCTP_M_ITER);
5946         }
5947         SCTP_IPI_ITERATOR_WQ_UNLOCK();
5948         SCTP_ITERATOR_LOCK();
5949         if ((sctp_it_ctl.cur_it) &&
5950             (sctp_it_ctl.cur_it->vn == curvnet)) {
5951                 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT;
5952         }
5953         SCTP_ITERATOR_UNLOCK();
5954         SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer));
5955         SCTP_WQ_ADDR_LOCK();
5956         LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
5957                 LIST_REMOVE(wi, sctp_nxt_addr);
5958                 SCTP_DECR_LADDR_COUNT();
5959                 if (wi->action == SCTP_DEL_IP_ADDRESS) {
5960                         SCTP_FREE(wi->ifa, SCTP_M_IFA);
5961                 }
5962                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi);
5963         }
5964         SCTP_WQ_ADDR_UNLOCK();
5965
5966         /*
5967          * free the vrf/ifn/ifa lists and hashes (be sure address monitor is
5968          * destroyed first).
5969          */
5970         vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))];
5971         LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) {
5972                 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) {
5973                         LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) {
5974                                 /* free the ifa */
5975                                 LIST_REMOVE(ifa, next_bucket);
5976                                 LIST_REMOVE(ifa, next_ifa);
5977                                 SCTP_FREE(ifa, SCTP_M_IFA);
5978                         }
5979                         /* free the ifn */
5980                         LIST_REMOVE(ifn, next_bucket);
5981                         LIST_REMOVE(ifn, next_ifn);
5982                         SCTP_FREE(ifn, SCTP_M_IFN);
5983                 }
5984                 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark);
5985                 /* free the vrf */
5986                 LIST_REMOVE(vrf, next_vrf);
5987                 SCTP_FREE(vrf, SCTP_M_VRF);
5988         }
5989         /* free the vrf hashes */
5990         SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark));
5991         SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark));
5992
5993         /*
5994          * free the TIMEWAIT list elements malloc'd in the function
5995          * sctp_add_vtag_to_timewait()...
5996          */
5997         for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) {
5998                 chain = &SCTP_BASE_INFO(vtag_timewait)[i];
5999                 if (!LIST_EMPTY(chain)) {
6000                         prev_twait_block = NULL;
6001                         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6002                                 if (prev_twait_block) {
6003                                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6004                                 }
6005                                 prev_twait_block = twait_block;
6006                         }
6007                         SCTP_FREE(prev_twait_block, SCTP_M_TIMW);
6008                 }
6009         }
6010
6011         /* free the locks and mutexes */
6012 #ifdef SCTP_PACKET_LOGGING
6013         SCTP_IP_PKTLOG_DESTROY();
6014 #endif
6015         SCTP_IPI_ADDR_DESTROY();
6016         SCTP_STATLOG_DESTROY();
6017         SCTP_INP_INFO_LOCK_DESTROY();
6018
6019         SCTP_WQ_ADDR_DESTROY();
6020
6021         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep));
6022         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc));
6023         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr));
6024         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net));
6025         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk));
6026         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq));
6027         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq));
6028         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf));
6029         SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack));
6030         /* Get rid of other stuff to */
6031         if (SCTP_BASE_INFO(sctp_asochash) != NULL)
6032                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark));
6033         if (SCTP_BASE_INFO(sctp_ephash) != NULL)
6034                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark));
6035         if (SCTP_BASE_INFO(sctp_tcpephash) != NULL)
6036                 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark));
6037 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT)
6038         SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE);
6039 #endif
6040 }
6041
6042
6043 int
6044 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m,
6045     int offset, int limit,
6046     struct sockaddr *src, struct sockaddr *dst,
6047     struct sockaddr *altsa)
6048 {
6049         /*
6050          * grub through the INIT pulling addresses and loading them to the
6051          * nets structure in the asoc. The from address in the mbuf should
6052          * also be loaded (if it is not already). This routine can be called
6053          * with either INIT or INIT-ACK's as long as the m points to the IP
6054          * packet and the offset points to the beginning of the parameters.
6055          */
6056         struct sctp_inpcb *inp;
6057         struct sctp_nets *net, *nnet, *net_tmp;
6058         struct sctp_paramhdr *phdr, parm_buf;
6059         struct sctp_tcb *stcb_tmp;
6060         uint16_t ptype, plen;
6061         struct sockaddr *sa;
6062         uint8_t random_store[SCTP_PARAM_BUFFER_SIZE];
6063         struct sctp_auth_random *p_random = NULL;
6064         uint16_t random_len = 0;
6065         uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE];
6066         struct sctp_auth_hmac_algo *hmacs = NULL;
6067         uint16_t hmacs_len = 0;
6068         uint8_t saw_asconf = 0;
6069         uint8_t saw_asconf_ack = 0;
6070         uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE];
6071         struct sctp_auth_chunk_list *chunks = NULL;
6072         uint16_t num_chunks = 0;
6073         sctp_key_t *new_key;
6074         uint32_t keylen;
6075         int got_random = 0, got_hmacs = 0, got_chklist = 0;
6076         uint8_t peer_supports_ecn;
6077         uint8_t peer_supports_prsctp;
6078         uint8_t peer_supports_auth;
6079         uint8_t peer_supports_asconf;
6080         uint8_t peer_supports_asconf_ack;
6081         uint8_t peer_supports_reconfig;
6082         uint8_t peer_supports_nrsack;
6083         uint8_t peer_supports_pktdrop;
6084
6085 #ifdef INET
6086         struct sockaddr_in sin;
6087
6088 #endif
6089 #ifdef INET6
6090         struct sockaddr_in6 sin6;
6091
6092 #endif
6093
6094         /* First get the destination address setup too. */
6095 #ifdef INET
6096         memset(&sin, 0, sizeof(sin));
6097         sin.sin_family = AF_INET;
6098         sin.sin_len = sizeof(sin);
6099         sin.sin_port = stcb->rport;
6100 #endif
6101 #ifdef INET6
6102         memset(&sin6, 0, sizeof(sin6));
6103         sin6.sin6_family = AF_INET6;
6104         sin6.sin6_len = sizeof(struct sockaddr_in6);
6105         sin6.sin6_port = stcb->rport;
6106 #endif
6107         if (altsa) {
6108                 sa = altsa;
6109         } else {
6110                 sa = src;
6111         }
6112         peer_supports_ecn = 0;
6113         peer_supports_prsctp = 0;
6114         peer_supports_auth = 0;
6115         peer_supports_asconf = 0;
6116         peer_supports_reconfig = 0;
6117         peer_supports_nrsack = 0;
6118         peer_supports_pktdrop = 0;
6119         TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) {
6120                 /* mark all addresses that we have currently on the list */
6121                 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC;
6122         }
6123         /* does the source address already exist? if so skip it */
6124         inp = stcb->sctp_ep;
6125         atomic_add_int(&stcb->asoc.refcnt, 1);
6126         stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb);
6127         atomic_add_int(&stcb->asoc.refcnt, -1);
6128
6129         if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) {
6130                 /* we must add the source address */
6131                 /* no scope set here since we have a tcb already. */
6132                 switch (sa->sa_family) {
6133 #ifdef INET
6134                 case AF_INET:
6135                         if (stcb->asoc.scope.ipv4_addr_legal) {
6136                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) {
6137                                         return (-1);
6138                                 }
6139                         }
6140                         break;
6141 #endif
6142 #ifdef INET6
6143                 case AF_INET6:
6144                         if (stcb->asoc.scope.ipv6_addr_legal) {
6145                                 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) {
6146                                         return (-2);
6147                                 }
6148                         }
6149                         break;
6150 #endif
6151                 default:
6152                         break;
6153                 }
6154         } else {
6155                 if (net_tmp != NULL && stcb_tmp == stcb) {
6156                         net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC;
6157                 } else if (stcb_tmp != stcb) {
6158                         /* It belongs to another association? */
6159                         if (stcb_tmp)
6160                                 SCTP_TCB_UNLOCK(stcb_tmp);
6161                         return (-3);
6162                 }
6163         }
6164         if (stcb->asoc.state == 0) {
6165                 /* the assoc was freed? */
6166                 return (-4);
6167         }
6168         /* now we must go through each of the params. */
6169         phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf));
6170         while (phdr) {
6171                 ptype = ntohs(phdr->param_type);
6172                 plen = ntohs(phdr->param_length);
6173                 /*
6174                  * SCTP_PRINTF("ptype => %0x, plen => %d\n",
6175                  * (uint32_t)ptype, (int)plen);
6176                  */
6177                 if (offset + plen > limit) {
6178                         break;
6179                 }
6180                 if (plen == 0) {
6181                         break;
6182                 }
6183 #ifdef INET
6184                 if (ptype == SCTP_IPV4_ADDRESS) {
6185                         if (stcb->asoc.scope.ipv4_addr_legal) {
6186                                 struct sctp_ipv4addr_param *p4, p4_buf;
6187
6188                                 /* ok get the v4 address and check/add */
6189                                 phdr = sctp_get_next_param(m, offset,
6190                                     (struct sctp_paramhdr *)&p4_buf,
6191                                     sizeof(p4_buf));
6192                                 if (plen != sizeof(struct sctp_ipv4addr_param) ||
6193                                     phdr == NULL) {
6194                                         return (-5);
6195                                 }
6196                                 p4 = (struct sctp_ipv4addr_param *)phdr;
6197                                 sin.sin_addr.s_addr = p4->addr;
6198                                 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) {
6199                                         /* Skip multi-cast addresses */
6200                                         goto next_param;
6201                                 }
6202                                 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) ||
6203                                     (sin.sin_addr.s_addr == INADDR_ANY)) {
6204                                         goto next_param;
6205                                 }
6206                                 sa = (struct sockaddr *)&sin;
6207                                 inp = stcb->sctp_ep;
6208                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6209                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6210                                     dst, stcb);
6211                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6212
6213                                 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) ||
6214                                     inp == NULL) {
6215                                         /* we must add the source address */
6216                                         /*
6217                                          * no scope set since we have a tcb
6218                                          * already
6219                                          */
6220
6221                                         /*
6222                                          * we must validate the state again
6223                                          * here
6224                                          */
6225                         add_it_now:
6226                                         if (stcb->asoc.state == 0) {
6227                                                 /* the assoc was freed? */
6228                                                 return (-7);
6229                                         }
6230                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) {
6231                                                 return (-8);
6232                                         }
6233                                 } else if (stcb_tmp == stcb) {
6234                                         if (stcb->asoc.state == 0) {
6235                                                 /* the assoc was freed? */
6236                                                 return (-10);
6237                                         }
6238                                         if (net != NULL) {
6239                                                 /* clear flag */
6240                                                 net->dest_state &=
6241                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6242                                         }
6243                                 } else {
6244                                         /*
6245                                          * strange, address is in another
6246                                          * assoc? straighten out locks.
6247                                          */
6248                                         if (stcb_tmp) {
6249                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6250                                                         /*
6251                                                          * in setup state we
6252                                                          * abort this guy
6253                                                          */
6254                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6255                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6256                                                         goto add_it_now;
6257                                                 }
6258                                                 SCTP_TCB_UNLOCK(stcb_tmp);
6259                                         }
6260                                         if (stcb->asoc.state == 0) {
6261                                                 /* the assoc was freed? */
6262                                                 return (-12);
6263                                         }
6264                                         return (-13);
6265                                 }
6266                         }
6267                 } else
6268 #endif
6269 #ifdef INET6
6270                 if (ptype == SCTP_IPV6_ADDRESS) {
6271                         if (stcb->asoc.scope.ipv6_addr_legal) {
6272                                 /* ok get the v6 address and check/add */
6273                                 struct sctp_ipv6addr_param *p6, p6_buf;
6274
6275                                 phdr = sctp_get_next_param(m, offset,
6276                                     (struct sctp_paramhdr *)&p6_buf,
6277                                     sizeof(p6_buf));
6278                                 if (plen != sizeof(struct sctp_ipv6addr_param) ||
6279                                     phdr == NULL) {
6280                                         return (-14);
6281                                 }
6282                                 p6 = (struct sctp_ipv6addr_param *)phdr;
6283                                 memcpy((caddr_t)&sin6.sin6_addr, p6->addr,
6284                                     sizeof(p6->addr));
6285                                 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) {
6286                                         /* Skip multi-cast addresses */
6287                                         goto next_param;
6288                                 }
6289                                 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) {
6290                                         /*
6291                                          * Link local make no sense without
6292                                          * scope
6293                                          */
6294                                         goto next_param;
6295                                 }
6296                                 sa = (struct sockaddr *)&sin6;
6297                                 inp = stcb->sctp_ep;
6298                                 atomic_add_int(&stcb->asoc.refcnt, 1);
6299                                 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net,
6300                                     dst, stcb);
6301                                 atomic_add_int(&stcb->asoc.refcnt, -1);
6302                                 if (stcb_tmp == NULL &&
6303                                     (inp == stcb->sctp_ep || inp == NULL)) {
6304                                         /*
6305                                          * we must validate the state again
6306                                          * here
6307                                          */
6308                         add_it_now6:
6309                                         if (stcb->asoc.state == 0) {
6310                                                 /* the assoc was freed? */
6311                                                 return (-16);
6312                                         }
6313                                         /*
6314                                          * we must add the address, no scope
6315                                          * set
6316                                          */
6317                                         if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) {
6318                                                 return (-17);
6319                                         }
6320                                 } else if (stcb_tmp == stcb) {
6321                                         /*
6322                                          * we must validate the state again
6323                                          * here
6324                                          */
6325                                         if (stcb->asoc.state == 0) {
6326                                                 /* the assoc was freed? */
6327                                                 return (-19);
6328                                         }
6329                                         if (net != NULL) {
6330                                                 /* clear flag */
6331                                                 net->dest_state &=
6332                                                     ~SCTP_ADDR_NOT_IN_ASSOC;
6333                                         }
6334                                 } else {
6335                                         /*
6336                                          * strange, address is in another
6337                                          * assoc? straighten out locks.
6338                                          */
6339                                         if (stcb_tmp)
6340                                                 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) {
6341                                                         /*
6342                                                          * in setup state we
6343                                                          * abort this guy
6344                                                          */
6345                                                         sctp_abort_an_association(stcb_tmp->sctp_ep,
6346                                                             stcb_tmp, NULL, SCTP_SO_NOT_LOCKED);
6347                                                         goto add_it_now6;
6348                                                 }
6349                                         SCTP_TCB_UNLOCK(stcb_tmp);
6350
6351                                         if (stcb->asoc.state == 0) {
6352                                                 /* the assoc was freed? */
6353                                                 return (-21);
6354                                         }
6355                                         return (-22);
6356                                 }
6357                         }
6358                 } else
6359 #endif
6360                 if (ptype == SCTP_ECN_CAPABLE) {
6361                         peer_supports_ecn = 1;
6362                 } else if (ptype == SCTP_ULP_ADAPTATION) {
6363                         if (stcb->asoc.state != SCTP_STATE_OPEN) {
6364                                 struct sctp_adaptation_layer_indication ai,
6365                                                                 *aip;
6366
6367                                 phdr = sctp_get_next_param(m, offset,
6368                                     (struct sctp_paramhdr *)&ai, sizeof(ai));
6369                                 aip = (struct sctp_adaptation_layer_indication *)phdr;
6370                                 if (aip) {
6371                                         stcb->asoc.peers_adaptation = ntohl(aip->indication);
6372                                         stcb->asoc.adaptation_needed = 1;
6373                                 }
6374                         }
6375                 } else if (ptype == SCTP_SET_PRIM_ADDR) {
6376                         struct sctp_asconf_addr_param lstore, *fee;
6377                         int lptype;
6378                         struct sockaddr *lsa = NULL;
6379
6380 #ifdef INET
6381                         struct sctp_asconf_addrv4_param *fii;
6382
6383 #endif
6384
6385                         if (stcb->asoc.asconf_supported == 0) {
6386                                 return (-100);
6387                         }
6388                         if (plen > sizeof(lstore)) {
6389                                 return (-23);
6390                         }
6391                         phdr = sctp_get_next_param(m, offset,
6392                             (struct sctp_paramhdr *)&lstore,
6393                             min(plen, sizeof(lstore)));
6394                         if (phdr == NULL) {
6395                                 return (-24);
6396                         }
6397                         fee = (struct sctp_asconf_addr_param *)phdr;
6398                         lptype = ntohs(fee->addrp.ph.param_type);
6399                         switch (lptype) {
6400 #ifdef INET
6401                         case SCTP_IPV4_ADDRESS:
6402                                 if (plen !=
6403                                     sizeof(struct sctp_asconf_addrv4_param)) {
6404                                         SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n",
6405                                             (int)sizeof(struct sctp_asconf_addrv4_param),
6406                                             plen);
6407                                 } else {
6408                                         fii = (struct sctp_asconf_addrv4_param *)fee;
6409                                         sin.sin_addr.s_addr = fii->addrp.addr;
6410                                         lsa = (struct sockaddr *)&sin;
6411                                 }
6412                                 break;
6413 #endif
6414 #ifdef INET6
6415                         case SCTP_IPV6_ADDRESS:
6416                                 if (plen !=
6417                                     sizeof(struct sctp_asconf_addr_param)) {
6418                                         SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n",
6419                                             (int)sizeof(struct sctp_asconf_addr_param),
6420                                             plen);
6421                                 } else {
6422                                         memcpy(sin6.sin6_addr.s6_addr,
6423                                             fee->addrp.addr,
6424                                             sizeof(fee->addrp.addr));
6425                                         lsa = (struct sockaddr *)&sin6;
6426                                 }
6427                                 break;
6428 #endif
6429                         default:
6430                                 break;
6431                         }
6432                         if (lsa) {
6433                                 (void)sctp_set_primary_addr(stcb, sa, NULL);
6434                         }
6435                 } else if (ptype == SCTP_HAS_NAT_SUPPORT) {
6436                         stcb->asoc.peer_supports_nat = 1;
6437                 } else if (ptype == SCTP_PRSCTP_SUPPORTED) {
6438                         /* Peer supports pr-sctp */
6439                         peer_supports_prsctp = 1;
6440                 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) {
6441                         /* A supported extension chunk */
6442                         struct sctp_supported_chunk_types_param *pr_supported;
6443                         uint8_t local_store[SCTP_PARAM_BUFFER_SIZE];
6444                         int num_ent, i;
6445
6446                         phdr = sctp_get_next_param(m, offset,
6447                             (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen));
6448                         if (phdr == NULL) {
6449                                 return (-25);
6450                         }
6451                         pr_supported = (struct sctp_supported_chunk_types_param *)phdr;
6452                         num_ent = plen - sizeof(struct sctp_paramhdr);
6453                         for (i = 0; i < num_ent; i++) {
6454                                 switch (pr_supported->chunk_types[i]) {
6455                                 case SCTP_ASCONF:
6456                                         peer_supports_asconf = 1;
6457                                         break;
6458                                 case SCTP_ASCONF_ACK:
6459                                         peer_supports_asconf_ack = 1;
6460                                         break;
6461                                 case SCTP_FORWARD_CUM_TSN:
6462                                         peer_supports_prsctp = 1;
6463                                         break;
6464                                 case SCTP_PACKET_DROPPED:
6465                                         peer_supports_pktdrop = 1;
6466                                         break;
6467                                 case SCTP_NR_SELECTIVE_ACK:
6468                                         peer_supports_nrsack = 1;
6469                                         break;
6470                                 case SCTP_STREAM_RESET:
6471                                         peer_supports_reconfig = 1;
6472                                         break;
6473                                 case SCTP_AUTHENTICATION:
6474                                         peer_supports_auth = 1;
6475                                         break;
6476                                 default:
6477                                         /* one I have not learned yet */
6478                                         break;
6479
6480                                 }
6481                         }
6482                 } else if (ptype == SCTP_RANDOM) {
6483                         if (plen > sizeof(random_store))
6484                                 break;
6485                         if (got_random) {
6486                                 /* already processed a RANDOM */
6487                                 goto next_param;
6488                         }
6489                         phdr = sctp_get_next_param(m, offset,
6490                             (struct sctp_paramhdr *)random_store,
6491                             min(sizeof(random_store), plen));
6492                         if (phdr == NULL)
6493                                 return (-26);
6494                         p_random = (struct sctp_auth_random *)phdr;
6495                         random_len = plen - sizeof(*p_random);
6496                         /* enforce the random length */
6497                         if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) {
6498                                 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n");
6499                                 return (-27);
6500                         }
6501                         got_random = 1;
6502                 } else if (ptype == SCTP_HMAC_LIST) {
6503                         uint16_t num_hmacs;
6504                         uint16_t i;
6505
6506                         if (plen > sizeof(hmacs_store))
6507                                 break;
6508                         if (got_hmacs) {
6509                                 /* already processed a HMAC list */
6510                                 goto next_param;
6511                         }
6512                         phdr = sctp_get_next_param(m, offset,
6513                             (struct sctp_paramhdr *)hmacs_store,
6514                             min(plen, sizeof(hmacs_store)));
6515                         if (phdr == NULL)
6516                                 return (-28);
6517                         hmacs = (struct sctp_auth_hmac_algo *)phdr;
6518                         hmacs_len = plen - sizeof(*hmacs);
6519                         num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]);
6520                         /* validate the hmac list */
6521                         if (sctp_verify_hmac_param(hmacs, num_hmacs)) {
6522                                 return (-29);
6523                         }
6524                         if (stcb->asoc.peer_hmacs != NULL)
6525                                 sctp_free_hmaclist(stcb->asoc.peer_hmacs);
6526                         stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs);
6527                         if (stcb->asoc.peer_hmacs != NULL) {
6528                                 for (i = 0; i < num_hmacs; i++) {
6529                                         (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs,
6530                                             ntohs(hmacs->hmac_ids[i]));
6531                                 }
6532                         }
6533                         got_hmacs = 1;
6534                 } else if (ptype == SCTP_CHUNK_LIST) {
6535                         int i;
6536
6537                         if (plen > sizeof(chunks_store))
6538                                 break;
6539                         if (got_chklist) {
6540                                 /* already processed a Chunks list */
6541                                 goto next_param;
6542                         }
6543                         phdr = sctp_get_next_param(m, offset,
6544                             (struct sctp_paramhdr *)chunks_store,
6545                             min(plen, sizeof(chunks_store)));
6546                         if (phdr == NULL)
6547                                 return (-30);
6548                         chunks = (struct sctp_auth_chunk_list *)phdr;
6549                         num_chunks = plen - sizeof(*chunks);
6550                         if (stcb->asoc.peer_auth_chunks != NULL)
6551                                 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks);
6552                         else
6553                                 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist();
6554                         for (i = 0; i < num_chunks; i++) {
6555                                 (void)sctp_auth_add_chunk(chunks->chunk_types[i],
6556                                     stcb->asoc.peer_auth_chunks);
6557                                 /* record asconf/asconf-ack if listed */
6558                                 if (chunks->chunk_types[i] == SCTP_ASCONF)
6559                                         saw_asconf = 1;
6560                                 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK)
6561                                         saw_asconf_ack = 1;
6562
6563                         }
6564                         got_chklist = 1;
6565                 } else if ((ptype == SCTP_HEARTBEAT_INFO) ||
6566                             (ptype == SCTP_STATE_COOKIE) ||
6567                             (ptype == SCTP_UNRECOG_PARAM) ||
6568                             (ptype == SCTP_COOKIE_PRESERVE) ||
6569                             (ptype == SCTP_SUPPORTED_ADDRTYPE) ||
6570                             (ptype == SCTP_ADD_IP_ADDRESS) ||
6571                             (ptype == SCTP_DEL_IP_ADDRESS) ||
6572                             (ptype == SCTP_ERROR_CAUSE_IND) ||
6573                     (ptype == SCTP_SUCCESS_REPORT)) {
6574                          /* don't care */ ;
6575                 } else {
6576                         if ((ptype & 0x8000) == 0x0000) {
6577                                 /*
6578                                  * must stop processing the rest of the
6579                                  * param's. Any report bits were handled
6580                                  * with the call to
6581                                  * sctp_arethere_unrecognized_parameters()
6582                                  * when the INIT or INIT-ACK was first seen.
6583                                  */
6584                                 break;
6585                         }
6586                 }
6587
6588 next_param:
6589                 offset += SCTP_SIZE32(plen);
6590                 if (offset >= limit) {
6591                         break;
6592                 }
6593                 phdr = sctp_get_next_param(m, offset, &parm_buf,
6594                     sizeof(parm_buf));
6595         }
6596         /* Now check to see if we need to purge any addresses */
6597         TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) {
6598                 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) ==
6599                     SCTP_ADDR_NOT_IN_ASSOC) {
6600                         /* This address has been removed from the asoc */
6601                         /* remove and free it */
6602                         stcb->asoc.numnets--;
6603                         TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next);
6604                         sctp_free_remote_addr(net);
6605                         if (net == stcb->asoc.primary_destination) {
6606                                 stcb->asoc.primary_destination = NULL;
6607                                 sctp_select_primary_destination(stcb);
6608                         }
6609                 }
6610         }
6611         if ((stcb->asoc.ecn_supported == 1) &&
6612             (peer_supports_ecn == 0)) {
6613                 stcb->asoc.ecn_supported = 0;
6614         }
6615         if ((stcb->asoc.prsctp_supported == 1) &&
6616             (peer_supports_prsctp == 0)) {
6617                 stcb->asoc.prsctp_supported = 0;
6618         }
6619         if ((stcb->asoc.auth_supported == 1) &&
6620             ((peer_supports_auth == 0) ||
6621             (got_random == 0) || (got_hmacs == 0))) {
6622                 stcb->asoc.auth_supported = 0;
6623         }
6624         if ((stcb->asoc.asconf_supported == 1) &&
6625             ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) ||
6626             (stcb->asoc.auth_supported == 0) ||
6627             (saw_asconf == 0) || (saw_asconf_ack == 0))) {
6628                 stcb->asoc.asconf_supported = 0;
6629         }
6630         if ((stcb->asoc.reconfig_supported == 1) &&
6631             (peer_supports_reconfig == 0)) {
6632                 stcb->asoc.reconfig_supported = 0;
6633         }
6634         if ((stcb->asoc.nrsack_supported == 1) &&
6635             (peer_supports_nrsack == 0)) {
6636                 stcb->asoc.nrsack_supported = 0;
6637         }
6638         if ((stcb->asoc.pktdrop_supported == 1) &&
6639             (peer_supports_pktdrop == 0)) {
6640                 stcb->asoc.pktdrop_supported = 0;
6641         }
6642         /* validate authentication required parameters */
6643         if ((peer_supports_auth == 0) && (got_chklist == 1)) {
6644                 /* peer does not support auth but sent a chunks list? */
6645                 return (-31);
6646         }
6647         if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) {
6648                 /* peer supports asconf but not auth? */
6649                 return (-32);
6650         } else if ((peer_supports_asconf == 1) &&
6651                     (peer_supports_auth == 1) &&
6652             ((saw_asconf == 0) || (saw_asconf_ack == 0))) {
6653                 return (-33);
6654         }
6655         /* concatenate the full random key */
6656         keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len;
6657         if (chunks != NULL) {
6658                 keylen += sizeof(*chunks) + num_chunks;
6659         }
6660         new_key = sctp_alloc_key(keylen);
6661         if (new_key != NULL) {
6662                 /* copy in the RANDOM */
6663                 if (p_random != NULL) {
6664                         keylen = sizeof(*p_random) + random_len;
6665                         bcopy(p_random, new_key->key, keylen);
6666                 }
6667                 /* append in the AUTH chunks */
6668                 if (chunks != NULL) {
6669                         bcopy(chunks, new_key->key + keylen,
6670                             sizeof(*chunks) + num_chunks);
6671                         keylen += sizeof(*chunks) + num_chunks;
6672                 }
6673                 /* append in the HMACs */
6674                 if (hmacs != NULL) {
6675                         bcopy(hmacs, new_key->key + keylen,
6676                             sizeof(*hmacs) + hmacs_len);
6677                 }
6678         } else {
6679                 /* failed to get memory for the key */
6680                 return (-34);
6681         }
6682         if (stcb->asoc.authinfo.peer_random != NULL)
6683                 sctp_free_key(stcb->asoc.authinfo.peer_random);
6684         stcb->asoc.authinfo.peer_random = new_key;
6685         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid);
6686         sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid);
6687
6688         return (0);
6689 }
6690
6691 int
6692 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa,
6693     struct sctp_nets *net)
6694 {
6695         /* make sure the requested primary address exists in the assoc */
6696         if (net == NULL && sa)
6697                 net = sctp_findnet(stcb, sa);
6698
6699         if (net == NULL) {
6700                 /* didn't find the requested primary address! */
6701                 return (-1);
6702         } else {
6703                 /* set the primary address */
6704                 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) {
6705                         /* Must be confirmed, so queue to set */
6706                         net->dest_state |= SCTP_ADDR_REQ_PRIMARY;
6707                         return (0);
6708                 }
6709                 stcb->asoc.primary_destination = net;
6710                 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) {
6711                         sctp_free_remote_addr(stcb->asoc.alternate);
6712                         stcb->asoc.alternate = NULL;
6713                 }
6714                 net = TAILQ_FIRST(&stcb->asoc.nets);
6715                 if (net != stcb->asoc.primary_destination) {
6716                         /*
6717                          * first one on the list is NOT the primary
6718                          * sctp_cmpaddr() is much more efficient if the
6719                          * primary is the first on the list, make it so.
6720                          */
6721                         TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6722                         TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next);
6723                 }
6724                 return (0);
6725         }
6726 }
6727
6728 int
6729 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now)
6730 {
6731         /*
6732          * This function serves two purposes. It will see if a TAG can be
6733          * re-used and return 1 for yes it is ok and 0 for don't use that
6734          * tag. A secondary function it will do is purge out old tags that
6735          * can be removed.
6736          */
6737         struct sctpvtaghead *chain;
6738         struct sctp_tagblock *twait_block;
6739         struct sctpasochead *head;
6740         struct sctp_tcb *stcb;
6741         int i;
6742
6743         SCTP_INP_INFO_RLOCK();
6744         head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag,
6745             SCTP_BASE_INFO(hashasocmark))];
6746         LIST_FOREACH(stcb, head, sctp_asocs) {
6747                 /*
6748                  * We choose not to lock anything here. TCB's can't be
6749                  * removed since we have the read lock, so they can't be
6750                  * freed on us, same thing for the INP. I may be wrong with
6751                  * this assumption, but we will go with it for now :-)
6752                  */
6753                 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) {
6754                         continue;
6755                 }
6756                 if (stcb->asoc.my_vtag == tag) {
6757                         /* candidate */
6758                         if (stcb->rport != rport) {
6759                                 continue;
6760                         }
6761                         if (stcb->sctp_ep->sctp_lport != lport) {
6762                                 continue;
6763                         }
6764                         /* Its a used tag set */
6765                         SCTP_INP_INFO_RUNLOCK();
6766                         return (0);
6767                 }
6768         }
6769         chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)];
6770         /* Now what about timed wait ? */
6771         LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) {
6772                 /*
6773                  * Block(s) are present, lets see if we have this tag in the
6774                  * list
6775                  */
6776                 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) {
6777                         if (twait_block->vtag_block[i].v_tag == 0) {
6778                                 /* not used */
6779                                 continue;
6780                         } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire <
6781                             now->tv_sec) {
6782                                 /* Audit expires this guy */
6783                                 twait_block->vtag_block[i].tv_sec_at_expire = 0;
6784                                 twait_block->vtag_block[i].v_tag = 0;
6785                                 twait_block->vtag_block[i].lport = 0;
6786                                 twait_block->vtag_block[i].rport = 0;
6787                         } else if ((twait_block->vtag_block[i].v_tag == tag) &&
6788                                     (twait_block->vtag_block[i].lport == lport) &&
6789                             (twait_block->vtag_block[i].rport == rport)) {
6790                                 /* Bad tag, sorry :< */
6791                                 SCTP_INP_INFO_RUNLOCK();
6792                                 return (0);
6793                         }
6794                 }
6795         }
6796         SCTP_INP_INFO_RUNLOCK();
6797         return (1);
6798 }
6799
6800 static void
6801 sctp_drain_mbufs(struct sctp_tcb *stcb)
6802 {
6803         /*
6804          * We must hunt this association for MBUF's past the cumack (i.e.
6805          * out of order data that we can renege on).
6806          */
6807         struct sctp_association *asoc;
6808         struct sctp_tmit_chunk *chk, *nchk;
6809         uint32_t cumulative_tsn_p1;
6810         struct sctp_queued_to_read *ctl, *nctl;
6811         int cnt, strmat;
6812         uint32_t gap, i;
6813         int fnd = 0;
6814
6815         /* We look for anything larger than the cum-ack + 1 */
6816
6817         asoc = &stcb->asoc;
6818         if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) {
6819                 /* none we can reneg on. */
6820                 return;
6821         }
6822         SCTP_STAT_INCR(sctps_protocol_drains_done);
6823         cumulative_tsn_p1 = asoc->cumulative_tsn + 1;
6824         cnt = 0;
6825         /* First look in the re-assembly queue */
6826         TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) {
6827                 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) {
6828                         /* Yep it is above cum-ack */
6829                         cnt++;
6830                         SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn);
6831                         asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size);
6832                         sctp_ucount_decr(asoc->cnt_on_reasm_queue);
6833                         SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6834                         TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next);
6835                         if (chk->data) {
6836                                 sctp_m_freem(chk->data);
6837                                 chk->data = NULL;
6838                         }
6839                         sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED);
6840                 }
6841         }
6842         /* Ok that was fun, now we will drain all the inbound streams? */
6843         for (strmat = 0; strmat < asoc->streamincnt; strmat++) {
6844                 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) {
6845                         if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) {
6846                                 /* Yep it is above cum-ack */
6847                                 cnt++;
6848                                 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn);
6849                                 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length);
6850                                 sctp_ucount_decr(asoc->cnt_on_all_streams);
6851                                 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap);
6852                                 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next);
6853                                 if (ctl->data) {
6854                                         sctp_m_freem(ctl->data);
6855                                         ctl->data = NULL;
6856                                 }
6857                                 sctp_free_remote_addr(ctl->whoFrom);
6858                                 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl);
6859                                 SCTP_DECR_READQ_COUNT();
6860                         }
6861                 }
6862         }
6863         if (cnt) {
6864                 /* We must back down to see what the new highest is */
6865                 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) {
6866                         SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn);
6867                         if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) {
6868                                 asoc->highest_tsn_inside_map = i;
6869                                 fnd = 1;
6870                                 break;
6871                         }
6872                 }
6873                 if (!fnd) {
6874                         asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1;
6875                 }
6876                 /*
6877                  * Question, should we go through the delivery queue? The
6878                  * only reason things are on here is the app not reading OR
6879                  * a p-d-api up. An attacker COULD send enough in to
6880                  * initiate the PD-API and then send a bunch of stuff to
6881                  * other streams... these would wind up on the delivery
6882                  * queue.. and then we would not get to them. But in order
6883                  * to do this I then have to back-track and un-deliver
6884                  * sequence numbers in streams.. el-yucko. I think for now
6885                  * we will NOT look at the delivery queue and leave it to be
6886                  * something to consider later. An alternative would be to
6887                  * abort the P-D-API with a notification and then deliver
6888                  * the data.... Or another method might be to keep track of
6889                  * how many times the situation occurs and if we see a
6890                  * possible attack underway just abort the association.
6891                  */
6892 #ifdef SCTP_DEBUG
6893                 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt);
6894 #endif
6895                 /*
6896                  * Now do we need to find a new
6897                  * asoc->highest_tsn_inside_map?
6898                  */
6899                 asoc->last_revoke_count = cnt;
6900                 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer);
6901                 /* sa_ignore NO_NULL_CHK */
6902                 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
6903                 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED);
6904         }
6905         /*
6906          * Another issue, in un-setting the TSN's in the mapping array we
6907          * DID NOT adjust the highest_tsn marker.  This will cause one of
6908          * two things to occur. It may cause us to do extra work in checking
6909          * for our mapping array movement. More importantly it may cause us
6910          * to SACK every datagram. This may not be a bad thing though since
6911          * we will recover once we get our cum-ack above and all this stuff
6912          * we dumped recovered.
6913          */
6914 }
6915
6916 void
6917 sctp_drain()
6918 {
6919         /*
6920          * We must walk the PCB lists for ALL associations here. The system
6921          * is LOW on MBUF's and needs help. This is where reneging will
6922          * occur. We really hope this does NOT happen!
6923          */
6924         VNET_ITERATOR_DECL(vnet_iter);
6925         VNET_LIST_RLOCK_NOSLEEP();
6926         VNET_FOREACH(vnet_iter) {
6927                 CURVNET_SET(vnet_iter);
6928                 struct sctp_inpcb *inp;
6929                 struct sctp_tcb *stcb;
6930
6931                 SCTP_STAT_INCR(sctps_protocol_drain_calls);
6932                 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) {
6933 #ifdef VIMAGE
6934                         continue;
6935 #else
6936                         return;
6937 #endif
6938                 }
6939                 SCTP_INP_INFO_RLOCK();
6940                 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) {
6941                         /* For each endpoint */
6942                         SCTP_INP_RLOCK(inp);
6943                         LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) {
6944                                 /* For each association */
6945                                 SCTP_TCB_LOCK(stcb);
6946                                 sctp_drain_mbufs(stcb);
6947                                 SCTP_TCB_UNLOCK(stcb);
6948                         }
6949                         SCTP_INP_RUNLOCK(inp);
6950                 }
6951                 SCTP_INP_INFO_RUNLOCK();
6952                 CURVNET_RESTORE();
6953         }
6954         VNET_LIST_RUNLOCK_NOSLEEP();
6955 }
6956
6957 /*
6958  * start a new iterator
6959  * iterates through all endpoints and associations based on the pcb_state
6960  * flags and asoc_state.  "af" (mandatory) is executed for all matching
6961  * assocs and "ef" (optional) is executed when the iterator completes.
6962  * "inpf" (optional) is executed for each new endpoint as it is being
6963  * iterated through. inpe (optional) is called when the inp completes
6964  * its way through all the stcbs.
6965  */
6966 int
6967 sctp_initiate_iterator(inp_func inpf,
6968     asoc_func af,
6969     inp_func inpe,
6970     uint32_t pcb_state,
6971     uint32_t pcb_features,
6972     uint32_t asoc_state,
6973     void *argp,
6974     uint32_t argi,
6975     end_func ef,
6976     struct sctp_inpcb *s_inp,
6977     uint8_t chunk_output_off)
6978 {
6979         struct sctp_iterator *it = NULL;
6980
6981         if (af == NULL) {
6982                 return (-1);
6983         }
6984         SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator),
6985             SCTP_M_ITER);
6986         if (it == NULL) {
6987                 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM);
6988                 return (ENOMEM);
6989         }
6990         memset(it, 0, sizeof(*it));
6991         it->function_assoc = af;
6992         it->function_inp = inpf;
6993         if (inpf)
6994                 it->done_current_ep = 0;
6995         else
6996                 it->done_current_ep = 1;
6997         it->function_atend = ef;
6998         it->pointer = argp;
6999         it->val = argi;
7000         it->pcb_flags = pcb_state;
7001         it->pcb_features = pcb_features;
7002         it->asoc_state = asoc_state;
7003         it->function_inp_end = inpe;
7004         it->no_chunk_output = chunk_output_off;
7005         it->vn = curvnet;
7006         if (s_inp) {
7007                 /* Assume lock is held here */
7008                 it->inp = s_inp;
7009                 SCTP_INP_INCR_REF(it->inp);
7010                 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP;
7011         } else {
7012                 SCTP_INP_INFO_RLOCK();
7013                 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead));
7014                 if (it->inp) {
7015                         SCTP_INP_INCR_REF(it->inp);
7016                 }
7017                 SCTP_INP_INFO_RUNLOCK();
7018                 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP;
7019
7020         }
7021         SCTP_IPI_ITERATOR_WQ_LOCK();
7022
7023         TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
7024         if (sctp_it_ctl.iterator_running == 0) {
7025                 sctp_wakeup_iterator();
7026         }
7027         SCTP_IPI_ITERATOR_WQ_UNLOCK();
7028         /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */
7029         return (0);
7030 }