sctp_pcb.c revision 170181
1/*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * a) Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * b) Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the distribution. 13 * 14 * c) Neither the name of Cisco Systems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31/* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: head/sys/netinet/sctp_pcb.c 170181 2007-06-01 11:19:54Z rrs $"); 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 49 50struct sctp_epinfo sctppcbinfo; 51 52/* FIX: we don't handle multiple link local scopes */ 53/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 54int 55SCTP6_ARE_ADDR_EQUAL(struct in6_addr *a, struct in6_addr *b) 56{ 57 struct in6_addr tmp_a, tmp_b; 58 59 /* use a copy of a and b */ 60 tmp_a = *a; 61 tmp_b = *b; 62 in6_clearscope(&tmp_a); 63 in6_clearscope(&tmp_b); 64 return (IN6_ARE_ADDR_EQUAL(&tmp_a, &tmp_b)); 65} 66 67void 68sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 69{ 70 /* 71 * We really don't need to lock this, but I will just because it 72 * does not hurt. 73 */ 74 SCTP_INP_INFO_RLOCK(); 75 spcb->ep_count = sctppcbinfo.ipi_count_ep; 76 spcb->asoc_count = sctppcbinfo.ipi_count_asoc; 77 spcb->laddr_count = sctppcbinfo.ipi_count_laddr; 78 spcb->raddr_count = sctppcbinfo.ipi_count_raddr; 79 spcb->chk_count = sctppcbinfo.ipi_count_chunk; 80 spcb->readq_count = sctppcbinfo.ipi_count_readq; 81 spcb->stream_oque = sctppcbinfo.ipi_count_strmoq; 82 spcb->free_chunks = sctppcbinfo.ipi_free_chunks; 83 84 SCTP_INP_INFO_RUNLOCK(); 85} 86 87/* 88 * Addresses are added to VRF's (Virtual Router's). For BSD we 89 * have only the default VRF 0. We maintain a hash list of 90 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 91 * these has a list of addresses. When we add a new address 92 * to a VRF we lookup the ifn/ifn_index, if the ifn does 93 * not exist we create it and add it to the list of IFN's 94 * within the VRF. Once we have the sctp_ifn, we add the 95 * address to the list. So we look something like: 96 * 97 * hash-vrf-table 98 * vrf-> ifn-> ifn -> ifn 99 * vrf | 100 * ... +--ifa-> ifa -> ifa 101 * vrf 102 * 103 * We keep these seperate lists since the SCTP subsystem will 104 * point to these from its source address selection nets structure. 105 * When an address is deleted it does not happen right away on 106 * the SCTP side, it gets scheduled. What we do when a 107 * delete happens is immediately remove the address from 108 * the master list and decrement the refcount. As our 109 * addip iterator works through and frees the src address 110 * selection pointing to the sctp_ifa, eventually the refcount 111 * will reach 0 and we will delete it. Note that it is assumed 112 * that any locking on system level ifn/ifa is done at the 113 * caller of these functions and these routines will only 114 * lock the SCTP structures as they add or delete things. 115 * 116 * Other notes on VRF concepts. 117 * - An endpoint can be in multiple VRF's 118 * - An association lives within a VRF and only one VRF. 119 * - Any incoming packet we can deduce the VRF for by 120 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 121 * - Any downward send call or connect call must supply the 122 * VRF via ancillary data or via some sort of set default 123 * VRF socket option call (again for BSD no brainer since 124 * the VRF is always 0). 125 * - An endpoint may add multiple VRF's to it. 126 * - Listening sockets can accept associations in any 127 * of the VRF's they are in but the assoc will end up 128 * in only one VRF (gotten from the packet or connect/send). 129 * 130 */ 131 132struct sctp_vrf * 133sctp_allocate_vrf(int vrf_id) 134{ 135 struct sctp_vrf *vrf = NULL; 136 struct sctp_vrflist *bucket; 137 138 /* First allocate the VRF structure */ 139 vrf = sctp_find_vrf(vrf_id); 140 if (vrf) { 141 /* Already allocated */ 142 return (vrf); 143 } 144 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 145 SCTP_M_VRF); 146 if (vrf == NULL) { 147 /* No memory */ 148#ifdef INVARIANTS 149 panic("No memory for VRF:%d", vrf_id); 150#endif 151 return (NULL); 152 } 153 /* setup the VRF */ 154 memset(vrf, 0, sizeof(struct sctp_vrf)); 155 vrf->vrf_id = vrf_id; 156 LIST_INIT(&vrf->ifnlist); 157 vrf->total_ifa_count = 0; 158 /* Init the HASH of addresses */ 159 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 160 &vrf->vrf_addr_hashmark); 161 if (vrf->vrf_addr_hash == NULL) { 162 /* No memory */ 163#ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165#endif 166 SCTP_FREE(vrf, SCTP_M_VRF); 167 return (NULL); 168 } 169 vrf->vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 170 &vrf->vrf_ifn_hashmark); 171 if (vrf->vrf_ifn_hash == NULL) { 172 /* No memory */ 173#ifdef INVARIANTS 174 panic("No memory for VRF:%d", vrf_id); 175#endif 176 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 177 SCTP_FREE(vrf, SCTP_M_VRF); 178 return (NULL); 179 } 180 /* Add it to the hash table */ 181 bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)]; 182 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 183 atomic_add_int(&sctppcbinfo.ipi_count_vrfs, 1); 184 return (vrf); 185} 186 187 188struct sctp_ifn * 189sctp_find_ifn(struct sctp_vrf *vrf, void *ifn, uint32_t ifn_index) 190{ 191 struct sctp_ifn *sctp_ifnp; 192 struct sctp_ifnlist *hash_ifn_head; 193 194 /* 195 * We assume the lock is held for the addresses if thats wrong 196 * problems could occur :-) 197 */ 198 hash_ifn_head = &vrf->vrf_ifn_hash[(ifn_index & vrf->vrf_ifn_hashmark)]; 199 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 200 if (sctp_ifnp->ifn_index == ifn_index) { 201 return (sctp_ifnp); 202 } 203 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 204 return (sctp_ifnp); 205 } 206 } 207 return (NULL); 208} 209 210 211 212struct sctp_vrf * 213sctp_find_vrf(uint32_t vrf_id) 214{ 215 struct sctp_vrflist *bucket; 216 struct sctp_vrf *liste; 217 218 bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)]; 219 LIST_FOREACH(liste, bucket, next_vrf) { 220 if (vrf_id == liste->vrf_id) { 221 return (liste); 222 } 223 } 224 return (NULL); 225} 226 227 228void 229sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 230{ 231 int ret; 232 233 ret = atomic_fetchadd_int(&sctp_ifnp->refcount, -1); 234 if (ret == 1) { 235 /* We zero'd the count */ 236 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 237 atomic_subtract_int(&sctppcbinfo.ipi_count_ifns, 1); 238 } 239} 240 241void 242sctp_update_ifn_mtu(uint32_t vrf_id, uint32_t ifn_index, uint32_t mtu) 243{ 244 struct sctp_ifn *sctp_ifnp; 245 struct sctp_vrf *vrf; 246 247 vrf = sctp_find_vrf(vrf_id); 248 if (vrf == NULL) 249 return; 250 sctp_ifnp = sctp_find_ifn(vrf, (void *)NULL, ifn_index); 251 if (sctp_ifnp != NULL) { 252 sctp_ifnp->ifn_mtu = mtu; 253 } 254} 255 256 257void 258sctp_free_ifa(struct sctp_ifa *sctp_ifap) 259{ 260 int ret; 261 262 ret = atomic_fetchadd_int(&sctp_ifap->refcount, -1); 263 if (ret == 1) { 264 /* We zero'd the count */ 265 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 266 atomic_subtract_int(&sctppcbinfo.ipi_count_ifas, 1); 267 } 268} 269 270static void 271sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 272{ 273 struct sctp_ifn *found; 274 275 found = sctp_find_ifn(sctp_ifnp->vrf, sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 276 if (found == NULL) { 277 /* Not in the list.. sorry */ 278 return; 279 } 280 if (hold_addr_lock == 0) 281 SCTP_IPI_ADDR_LOCK(); 282 LIST_REMOVE(sctp_ifnp, next_bucket); 283 LIST_REMOVE(sctp_ifnp, next_ifn); 284 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 285 sctp_ifnp->registered_af); 286 if (hold_addr_lock == 0) 287 SCTP_IPI_ADDR_UNLOCK(); 288 /* Take away the reference, and possibly free it */ 289 sctp_free_ifn(sctp_ifnp); 290} 291 292 293struct sctp_ifa * 294sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 295 uint32_t ifn_type, const char *if_name, 296 void *ifa, struct sockaddr *addr, uint32_t ifa_flags, 297 int dynamic_add) 298{ 299 struct sctp_vrf *vrf; 300 struct sctp_ifn *sctp_ifnp = NULL; 301 struct sctp_ifa *sctp_ifap = NULL; 302 struct sctp_ifalist *hash_addr_head; 303 struct sctp_ifnlist *hash_ifn_head; 304 uint32_t hash_of_addr; 305 int new_ifn_af = 0; 306 307 /* How granular do we need the locks to be here? */ 308 SCTP_IPI_ADDR_LOCK(); 309 vrf = sctp_find_vrf(vrf_id); 310 if (vrf == NULL) { 311 vrf = sctp_allocate_vrf(vrf_id); 312 if (vrf == NULL) { 313 SCTP_IPI_ADDR_UNLOCK(); 314 return (NULL); 315 } 316 } 317 sctp_ifnp = sctp_find_ifn(vrf, ifn, ifn_index); 318 if (sctp_ifnp == NULL) { 319 /* 320 * build one and add it, can't hold lock until after malloc 321 * done though. 322 */ 323 SCTP_IPI_ADDR_UNLOCK(); 324 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, sizeof(struct sctp_ifn), SCTP_M_IFN); 325 if (sctp_ifnp == NULL) { 326#ifdef INVARIANTS 327 panic("No memory for IFN:%u", sctp_ifnp->ifn_index); 328#endif 329 return (NULL); 330 } 331 sctp_ifnp->ifn_index = ifn_index; 332 sctp_ifnp->ifn_p = ifn; 333 sctp_ifnp->ifn_type = ifn_type; 334 sctp_ifnp->ifa_count = 0; 335 sctp_ifnp->refcount = 1; 336 sctp_ifnp->vrf = vrf; 337 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 338 if (if_name != NULL) { 339 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ); 340 } else { 341 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ)); 342 } 343 hash_ifn_head = &vrf->vrf_ifn_hash[(ifn_index & vrf->vrf_ifn_hashmark)]; 344 LIST_INIT(&sctp_ifnp->ifalist); 345 SCTP_IPI_ADDR_LOCK(); 346 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 347 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 348 atomic_add_int(&sctppcbinfo.ipi_count_ifns, 1); 349 new_ifn_af = 1; 350 } 351 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1); 352 if (sctp_ifap) { 353 /* Hmm, it already exists? */ 354 if ((sctp_ifap->ifn_p) && 355 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 356 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 357 /* easy to solve, just switch back to active */ 358 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 359 sctp_ifap->ifn_p = sctp_ifnp; 360 exit_stage_left: 361 SCTP_IPI_ADDR_UNLOCK(); 362 return (sctp_ifap); 363 } else { 364 goto exit_stage_left; 365 } 366 } else { 367 if (sctp_ifap->ifn_p) { 368 /* 369 * The first IFN gets the address, 370 * duplicates are ignored. 371 */ 372 goto exit_stage_left; 373 } else { 374 /* repair ifnp which was NULL ? */ 375 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 376 sctp_ifap->ifn_p = sctp_ifnp; 377 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 378 } 379 goto exit_stage_left; 380 } 381 } 382 SCTP_IPI_ADDR_UNLOCK(); 383 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 384 if (sctp_ifap == NULL) { 385#ifdef INVARIANTS 386 panic("No memory for IFA"); 387#endif 388 return (NULL); 389 } 390 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 391 sctp_ifap->ifn_p = sctp_ifnp; 392 atomic_add_int(&sctp_ifnp->refcount, 1); 393 394 sctp_ifap->ifa = ifa; 395 memcpy(&sctp_ifap->address, addr, addr->sa_len); 396 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 397 sctp_ifap->flags = ifa_flags; 398 /* Set scope */ 399 if (sctp_ifap->address.sa.sa_family == AF_INET) { 400 struct sockaddr_in *sin; 401 402 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 403 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 404 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 405 sctp_ifap->src_is_loop = 1; 406 } 407 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 408 sctp_ifap->src_is_priv = 1; 409 } 410 sctp_ifnp->num_v4++; 411 if (new_ifn_af) 412 new_ifn_af = AF_INET; 413 } else if (sctp_ifap->address.sa.sa_family == AF_INET6) { 414 /* ok to use deprecated addresses? */ 415 struct sockaddr_in6 *sin6; 416 417 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 418 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 419 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 420 sctp_ifap->src_is_loop = 1; 421 } 422 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 423 sctp_ifap->src_is_priv = 1; 424 } 425 sctp_ifnp->num_v6++; 426 if (new_ifn_af) 427 new_ifn_af = AF_INET6; 428 } else { 429 new_ifn_af = 0; 430 } 431 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 432 433 if ((sctp_ifap->src_is_priv == 0) && 434 (sctp_ifap->src_is_loop == 0)) { 435 sctp_ifap->src_is_glob = 1; 436 } 437 SCTP_IPI_ADDR_LOCK(); 438 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 439 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 440 sctp_ifap->refcount = 1; 441 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 442 sctp_ifnp->ifa_count++; 443 vrf->total_ifa_count++; 444 atomic_add_int(&sctppcbinfo.ipi_count_ifas, 1); 445 if (new_ifn_af) { 446 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 447 sctp_ifnp->registered_af = new_ifn_af; 448 } 449 SCTP_IPI_ADDR_UNLOCK(); 450 if (dynamic_add) { 451 /* 452 * Bump up the refcount so that when the timer completes it 453 * will drop back down. 454 */ 455 struct sctp_laddr *wi; 456 457 atomic_add_int(&sctp_ifap->refcount, 1); 458 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 459 if (wi == NULL) { 460 /* 461 * Gak, what can we do? We have lost an address 462 * change can you say HOSED? 463 */ 464 SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n"); 465 /* Opps, must decrement the count */ 466 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index); 467 return (NULL); 468 } 469 SCTP_INCR_LADDR_COUNT(); 470 bzero(wi, sizeof(*wi)); 471 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 472 wi->ifa = sctp_ifap; 473 wi->action = SCTP_ADD_IP_ADDRESS; 474 SCTP_IPI_ITERATOR_WQ_LOCK(); 475 /* 476 * Should this really be a tailq? As it is we will process 477 * the newest first :-0 478 */ 479 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr); 480 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 481 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 482 (struct sctp_inpcb *)NULL, 483 (struct sctp_tcb *)NULL, 484 (struct sctp_nets *)NULL); 485 } else { 486 /* it's ready for use */ 487 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 488 } 489 return (sctp_ifap); 490} 491 492void 493sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 494 uint32_t ifn_index) 495{ 496 struct sctp_vrf *vrf; 497 struct sctp_ifa *sctp_ifap = NULL; 498 499 SCTP_IPI_ADDR_LOCK(); 500 501 vrf = sctp_find_vrf(vrf_id); 502 if (vrf == NULL) { 503 SCTP_PRINTF("Can't find vrf_id:%d\n", vrf_id); 504 goto out_now; 505 } 506 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1); 507 if (sctp_ifap) { 508 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 509 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 510 vrf->total_ifa_count--; 511 LIST_REMOVE(sctp_ifap, next_bucket); 512 LIST_REMOVE(sctp_ifap, next_ifa); 513 if (sctp_ifap->ifn_p) { 514 sctp_ifap->ifn_p->ifa_count--; 515 if (sctp_ifap->address.sa.sa_family == AF_INET6) 516 sctp_ifap->ifn_p->num_v6--; 517 else if (sctp_ifap->address.sa.sa_family == AF_INET) 518 sctp_ifap->ifn_p->num_v4--; 519 if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 520 sctp_delete_ifn(sctp_ifap->ifn_p, 1); 521 } else { 522 if ((sctp_ifap->ifn_p->num_v6 == 0) && 523 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 524 SCTP_DEREGISTER_INTERFACE(ifn_index, 525 AF_INET6); 526 SCTP_REGISTER_INTERFACE(ifn_index, 527 AF_INET); 528 sctp_ifap->ifn_p->registered_af = AF_INET; 529 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 530 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 531 SCTP_DEREGISTER_INTERFACE(ifn_index, 532 AF_INET); 533 SCTP_REGISTER_INTERFACE(ifn_index, 534 AF_INET6); 535 sctp_ifap->ifn_p->registered_af = AF_INET6; 536 } 537 } 538 sctp_free_ifn(sctp_ifap->ifn_p); 539 sctp_ifap->ifn_p = NULL; 540 } 541 } 542#ifdef SCTP_DEBUG 543 else { 544 SCTPDBG(SCTP_DEBUG_PCB1, "Del Addr-ifn:%d Could not find address:", 545 ifn_index); 546 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 547 } 548#endif 549 550out_now: 551 SCTP_IPI_ADDR_UNLOCK(); 552 if (sctp_ifap) { 553 struct sctp_laddr *wi; 554 555 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 556 if (wi == NULL) { 557 /* 558 * Gak, what can we do? We have lost an address 559 * change can you say HOSED? 560 */ 561 SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n"); 562 563 /* Opps, must decrement the count */ 564 sctp_free_ifa(sctp_ifap); 565 return; 566 } 567 SCTP_INCR_LADDR_COUNT(); 568 bzero(wi, sizeof(*wi)); 569 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 570 wi->ifa = sctp_ifap; 571 wi->action = SCTP_DEL_IP_ADDRESS; 572 SCTP_IPI_ITERATOR_WQ_LOCK(); 573 /* 574 * Should this really be a tailq? As it is we will process 575 * the newest first :-0 576 */ 577 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr); 578 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 579 580 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 581 (struct sctp_inpcb *)NULL, 582 (struct sctp_tcb *)NULL, 583 (struct sctp_nets *)NULL); 584 } 585 return; 586} 587 588 589 590static struct sctp_tcb * 591sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 592 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 593{ 594 /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */ 595 /* 596 * If we support the TCP model, then we must now dig through to see 597 * if we can find our endpoint in the list of tcp ep's. 598 */ 599 uint16_t lport, rport; 600 struct sctppcbhead *ephead; 601 struct sctp_inpcb *inp; 602 struct sctp_laddr *laddr; 603 struct sctp_tcb *stcb; 604 struct sctp_nets *net; 605 606 if ((to == NULL) || (from == NULL)) { 607 return (NULL); 608 } 609 if (to->sa_family == AF_INET && from->sa_family == AF_INET) { 610 lport = ((struct sockaddr_in *)to)->sin_port; 611 rport = ((struct sockaddr_in *)from)->sin_port; 612 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) { 613 lport = ((struct sockaddr_in6 *)to)->sin6_port; 614 rport = ((struct sockaddr_in6 *)from)->sin6_port; 615 } else { 616 return NULL; 617 } 618 ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR( 619 (lport + rport), sctppcbinfo.hashtcpmark)]; 620 /* 621 * Ok now for each of the guys in this bucket we must look and see: 622 * - Does the remote port match. - Does there single association's 623 * addresses match this address (to). If so we update p_ep to point 624 * to this ep and return the tcb from it. 625 */ 626 LIST_FOREACH(inp, ephead, sctp_hash) { 627 SCTP_INP_RLOCK(inp); 628 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 629 SCTP_INP_RUNLOCK(inp); 630 continue; 631 } 632 if (lport != inp->sctp_lport) { 633 SCTP_INP_RUNLOCK(inp); 634 continue; 635 } 636 if (inp->def_vrf_id != vrf_id) { 637 SCTP_INP_RUNLOCK(inp); 638 continue; 639 } 640 /* check to see if the ep has one of the addresses */ 641 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 642 /* We are NOT bound all, so look further */ 643 int match = 0; 644 645 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 646 647 if (laddr->ifa == NULL) { 648 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 649 continue; 650 } 651 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 652 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 653 continue; 654 } 655 if (laddr->ifa->address.sa.sa_family == 656 to->sa_family) { 657 /* see if it matches */ 658 struct sockaddr_in *intf_addr, *sin; 659 660 intf_addr = &laddr->ifa->address.sin; 661 sin = (struct sockaddr_in *)to; 662 if (from->sa_family == AF_INET) { 663 if (sin->sin_addr.s_addr == 664 intf_addr->sin_addr.s_addr) { 665 match = 1; 666 break; 667 } 668 } else { 669 struct sockaddr_in6 *intf_addr6; 670 struct sockaddr_in6 *sin6; 671 672 sin6 = (struct sockaddr_in6 *) 673 to; 674 intf_addr6 = &laddr->ifa->address.sin6; 675 676 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 677 &intf_addr6->sin6_addr)) { 678 match = 1; 679 break; 680 } 681 } 682 } 683 } 684 if (match == 0) { 685 /* This endpoint does not have this address */ 686 SCTP_INP_RUNLOCK(inp); 687 continue; 688 } 689 } 690 /* 691 * Ok if we hit here the ep has the address, does it hold 692 * the tcb? 693 */ 694 695 stcb = LIST_FIRST(&inp->sctp_asoc_list); 696 if (stcb == NULL) { 697 SCTP_INP_RUNLOCK(inp); 698 continue; 699 } 700 SCTP_TCB_LOCK(stcb); 701 if (stcb->rport != rport) { 702 /* remote port does not match. */ 703 SCTP_TCB_UNLOCK(stcb); 704 SCTP_INP_RUNLOCK(inp); 705 continue; 706 } 707 /* Does this TCB have a matching address? */ 708 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 709 710 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 711 /* not the same family, can't be a match */ 712 continue; 713 } 714 if (from->sa_family == AF_INET) { 715 struct sockaddr_in *sin, *rsin; 716 717 sin = (struct sockaddr_in *)&net->ro._l_addr; 718 rsin = (struct sockaddr_in *)from; 719 if (sin->sin_addr.s_addr == 720 rsin->sin_addr.s_addr) { 721 /* found it */ 722 if (netp != NULL) { 723 *netp = net; 724 } 725 /* Update the endpoint pointer */ 726 *inp_p = inp; 727 SCTP_INP_RUNLOCK(inp); 728 return (stcb); 729 } 730 } else { 731 struct sockaddr_in6 *sin6, *rsin6; 732 733 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 734 rsin6 = (struct sockaddr_in6 *)from; 735 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 736 &rsin6->sin6_addr)) { 737 /* found it */ 738 if (netp != NULL) { 739 *netp = net; 740 } 741 /* Update the endpoint pointer */ 742 *inp_p = inp; 743 SCTP_INP_RUNLOCK(inp); 744 return (stcb); 745 } 746 } 747 } 748 SCTP_TCB_UNLOCK(stcb); 749 SCTP_INP_RUNLOCK(inp); 750 } 751 return (NULL); 752} 753 754/* 755 * rules for use 756 * 757 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 758 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 759 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 760 * NULL. 761 */ 762 763struct sctp_tcb * 764sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 765 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 766{ 767 struct sctpasochead *head; 768 struct sctp_inpcb *inp; 769 struct sctp_tcb *stcb = NULL; 770 struct sctp_nets *net; 771 uint16_t rport; 772 773 inp = *inp_p; 774 if (remote->sa_family == AF_INET) { 775 rport = (((struct sockaddr_in *)remote)->sin_port); 776 } else if (remote->sa_family == AF_INET6) { 777 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 778 } else { 779 return (NULL); 780 } 781 if (locked_tcb) { 782 /* 783 * UN-lock so we can do proper locking here this occurs when 784 * called from load_addresses_from_init. 785 */ 786 SCTP_TCB_UNLOCK(locked_tcb); 787 } 788 SCTP_INP_INFO_RLOCK(); 789 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 790 /*- 791 * Now either this guy is our listener or it's the 792 * connector. If it is the one that issued the connect, then 793 * it's only chance is to be the first TCB in the list. If 794 * it is the acceptor, then do the special_lookup to hash 795 * and find the real inp. 796 */ 797 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 798 /* to is peer addr, from is my addr */ 799 stcb = sctp_tcb_special_locate(inp_p, remote, local, 800 netp, inp->def_vrf_id); 801 if ((stcb != NULL) && (locked_tcb == NULL)) { 802 /* we have a locked tcb, lower refcount */ 803 SCTP_INP_WLOCK(inp); 804 SCTP_INP_DECR_REF(inp); 805 SCTP_INP_WUNLOCK(inp); 806 } 807 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 808 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 809 SCTP_TCB_LOCK(locked_tcb); 810 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 811 } 812 SCTP_INP_INFO_RUNLOCK(); 813 return (stcb); 814 } else { 815 SCTP_INP_WLOCK(inp); 816 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 817 goto null_return; 818 } 819 stcb = LIST_FIRST(&inp->sctp_asoc_list); 820 if (stcb == NULL) { 821 goto null_return; 822 } 823 SCTP_TCB_LOCK(stcb); 824 if (stcb->rport != rport) { 825 /* remote port does not match. */ 826 SCTP_TCB_UNLOCK(stcb); 827 goto null_return; 828 } 829 /* now look at the list of remote addresses */ 830 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 831#ifdef INVARIANTS 832 if (net == (TAILQ_NEXT(net, sctp_next))) { 833 panic("Corrupt net list"); 834 } 835#endif 836 if (net->ro._l_addr.sa.sa_family != 837 remote->sa_family) { 838 /* not the same family */ 839 continue; 840 } 841 if (remote->sa_family == AF_INET) { 842 struct sockaddr_in *sin, *rsin; 843 844 sin = (struct sockaddr_in *) 845 &net->ro._l_addr; 846 rsin = (struct sockaddr_in *)remote; 847 if (sin->sin_addr.s_addr == 848 rsin->sin_addr.s_addr) { 849 /* found it */ 850 if (netp != NULL) { 851 *netp = net; 852 } 853 if (locked_tcb == NULL) { 854 SCTP_INP_DECR_REF(inp); 855 } else if (locked_tcb != stcb) { 856 SCTP_TCB_LOCK(locked_tcb); 857 } 858 SCTP_INP_WUNLOCK(inp); 859 SCTP_INP_INFO_RUNLOCK(); 860 return (stcb); 861 } 862 } else if (remote->sa_family == AF_INET6) { 863 struct sockaddr_in6 *sin6, *rsin6; 864 865 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 866 rsin6 = (struct sockaddr_in6 *)remote; 867 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 868 &rsin6->sin6_addr)) { 869 /* found it */ 870 if (netp != NULL) { 871 *netp = net; 872 } 873 if (locked_tcb == NULL) { 874 SCTP_INP_DECR_REF(inp); 875 } else if (locked_tcb != stcb) { 876 SCTP_TCB_LOCK(locked_tcb); 877 } 878 SCTP_INP_WUNLOCK(inp); 879 SCTP_INP_INFO_RUNLOCK(); 880 return (stcb); 881 } 882 } 883 } 884 SCTP_TCB_UNLOCK(stcb); 885 } 886 } else { 887 SCTP_INP_WLOCK(inp); 888 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 889 goto null_return; 890 } 891 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 892 inp->sctp_hashmark)]; 893 if (head == NULL) { 894 goto null_return; 895 } 896 LIST_FOREACH(stcb, head, sctp_tcbhash) { 897 if (stcb->rport != rport) { 898 /* remote port does not match */ 899 continue; 900 } 901 /* now look at the list of remote addresses */ 902 SCTP_TCB_LOCK(stcb); 903 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 904#ifdef INVARIANTS 905 if (net == (TAILQ_NEXT(net, sctp_next))) { 906 panic("Corrupt net list"); 907 } 908#endif 909 if (net->ro._l_addr.sa.sa_family != 910 remote->sa_family) { 911 /* not the same family */ 912 continue; 913 } 914 if (remote->sa_family == AF_INET) { 915 struct sockaddr_in *sin, *rsin; 916 917 sin = (struct sockaddr_in *) 918 &net->ro._l_addr; 919 rsin = (struct sockaddr_in *)remote; 920 if (sin->sin_addr.s_addr == 921 rsin->sin_addr.s_addr) { 922 /* found it */ 923 if (netp != NULL) { 924 *netp = net; 925 } 926 if (locked_tcb == NULL) { 927 SCTP_INP_DECR_REF(inp); 928 } else if (locked_tcb != stcb) { 929 SCTP_TCB_LOCK(locked_tcb); 930 } 931 SCTP_INP_WUNLOCK(inp); 932 SCTP_INP_INFO_RUNLOCK(); 933 return (stcb); 934 } 935 } else if (remote->sa_family == AF_INET6) { 936 struct sockaddr_in6 *sin6, *rsin6; 937 938 sin6 = (struct sockaddr_in6 *) 939 &net->ro._l_addr; 940 rsin6 = (struct sockaddr_in6 *)remote; 941 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 942 &rsin6->sin6_addr)) { 943 /* found it */ 944 if (netp != NULL) { 945 *netp = net; 946 } 947 if (locked_tcb == NULL) { 948 SCTP_INP_DECR_REF(inp); 949 } else if (locked_tcb != stcb) { 950 SCTP_TCB_LOCK(locked_tcb); 951 } 952 SCTP_INP_WUNLOCK(inp); 953 SCTP_INP_INFO_RUNLOCK(); 954 return (stcb); 955 } 956 } 957 } 958 SCTP_TCB_UNLOCK(stcb); 959 } 960 } 961null_return: 962 /* clean up for returning null */ 963 if (locked_tcb) { 964 SCTP_TCB_LOCK(locked_tcb); 965 } 966 SCTP_INP_WUNLOCK(inp); 967 SCTP_INP_INFO_RUNLOCK(); 968 /* not found */ 969 return (NULL); 970} 971 972/* 973 * Find an association for a specific endpoint using the association id given 974 * out in the COMM_UP notification 975 */ 976 977struct sctp_tcb * 978sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 979{ 980 /* 981 * Use my the assoc_id to find a endpoint 982 */ 983 struct sctpasochead *head; 984 struct sctp_tcb *stcb; 985 uint32_t id; 986 987 if (asoc_id == 0 || inp == NULL) { 988 return (NULL); 989 } 990 SCTP_INP_INFO_RLOCK(); 991 id = (uint32_t) asoc_id; 992 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id, 993 sctppcbinfo.hashasocmark)]; 994 if (head == NULL) { 995 /* invalid id TSNH */ 996 SCTP_INP_INFO_RUNLOCK(); 997 return (NULL); 998 } 999 LIST_FOREACH(stcb, head, sctp_asocs) { 1000 SCTP_INP_RLOCK(stcb->sctp_ep); 1001 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1002 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1003 SCTP_INP_INFO_RUNLOCK(); 1004 return (NULL); 1005 } 1006 if (stcb->asoc.assoc_id == id) { 1007 /* candidate */ 1008 if (inp != stcb->sctp_ep) { 1009 /* 1010 * some other guy has the same id active (id 1011 * collision ??). 1012 */ 1013 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1014 continue; 1015 } 1016 if (want_lock) { 1017 SCTP_TCB_LOCK(stcb); 1018 } 1019 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1020 SCTP_INP_INFO_RUNLOCK(); 1021 return (stcb); 1022 } 1023 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1024 } 1025 /* Ok if we missed here, lets try the restart hash */ 1026 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashrestartmark)]; 1027 if (head == NULL) { 1028 /* invalid id TSNH */ 1029 SCTP_INP_INFO_RUNLOCK(); 1030 return (NULL); 1031 } 1032 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { 1033 SCTP_INP_RLOCK(stcb->sctp_ep); 1034 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1035 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1036 continue; 1037 } 1038 if (want_lock) { 1039 SCTP_TCB_LOCK(stcb); 1040 } 1041 if (stcb->asoc.assoc_id == id) { 1042 /* candidate */ 1043 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1044 if (inp != stcb->sctp_ep) { 1045 /* 1046 * some other guy has the same id active (id 1047 * collision ??). 1048 */ 1049 if (want_lock) { 1050 SCTP_TCB_UNLOCK(stcb); 1051 } 1052 continue; 1053 } 1054 SCTP_INP_INFO_RUNLOCK(); 1055 return (stcb); 1056 } else { 1057 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1058 } 1059 if (want_lock) { 1060 SCTP_TCB_UNLOCK(stcb); 1061 } 1062 } 1063 SCTP_INP_INFO_RUNLOCK(); 1064 return (NULL); 1065} 1066 1067 1068static struct sctp_inpcb * 1069sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1070 uint16_t lport, uint32_t vrf_id) 1071{ 1072 struct sctp_inpcb *inp; 1073 struct sockaddr_in *sin; 1074 struct sockaddr_in6 *sin6; 1075 struct sctp_laddr *laddr; 1076 int fnd; 1077 1078 /* 1079 * Endpoing probe expects that the INP_INFO is locked. 1080 */ 1081 if (nam->sa_family == AF_INET) { 1082 sin = (struct sockaddr_in *)nam; 1083 sin6 = NULL; 1084 } else if (nam->sa_family == AF_INET6) { 1085 sin6 = (struct sockaddr_in6 *)nam; 1086 sin = NULL; 1087 } else { 1088 /* unsupported family */ 1089 return (NULL); 1090 } 1091 if (head == NULL) 1092 return (NULL); 1093 LIST_FOREACH(inp, head, sctp_hash) { 1094 SCTP_INP_RLOCK(inp); 1095 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1096 SCTP_INP_RUNLOCK(inp); 1097 continue; 1098 } 1099 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1100 (inp->sctp_lport == lport)) { 1101 /* got it */ 1102 if ((nam->sa_family == AF_INET) && 1103 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1104 SCTP_IPV6_V6ONLY(inp)) { 1105 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1106 SCTP_INP_RUNLOCK(inp); 1107 continue; 1108 } 1109 /* A V6 address and the endpoint is NOT bound V6 */ 1110 if (nam->sa_family == AF_INET6 && 1111 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1112 SCTP_INP_RUNLOCK(inp); 1113 continue; 1114 } 1115 /* does a VRF id match? */ 1116 fnd = 0; 1117 if (inp->def_vrf_id == vrf_id) 1118 fnd = 1; 1119 1120 SCTP_INP_RUNLOCK(inp); 1121 if (!fnd) 1122 continue; 1123 return (inp); 1124 } 1125 SCTP_INP_RUNLOCK(inp); 1126 } 1127 1128 if ((nam->sa_family == AF_INET) && 1129 (sin->sin_addr.s_addr == INADDR_ANY)) { 1130 /* Can't hunt for one that has no address specified */ 1131 return (NULL); 1132 } else if ((nam->sa_family == AF_INET6) && 1133 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 1134 /* Can't hunt for one that has no address specified */ 1135 return (NULL); 1136 } 1137 /* 1138 * ok, not bound to all so see if we can find a EP bound to this 1139 * address. 1140 */ 1141 LIST_FOREACH(inp, head, sctp_hash) { 1142 SCTP_INP_RLOCK(inp); 1143 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1144 SCTP_INP_RUNLOCK(inp); 1145 continue; 1146 } 1147 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1148 SCTP_INP_RUNLOCK(inp); 1149 continue; 1150 } 1151 /* 1152 * Ok this could be a likely candidate, look at all of its 1153 * addresses 1154 */ 1155 if (inp->sctp_lport != lport) { 1156 SCTP_INP_RUNLOCK(inp); 1157 continue; 1158 } 1159 /* does a VRF id match? */ 1160 fnd = 0; 1161 if (inp->def_vrf_id == vrf_id) 1162 fnd = 1; 1163 1164 if (!fnd) { 1165 SCTP_INP_RUNLOCK(inp); 1166 continue; 1167 } 1168 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1169 if (laddr->ifa == NULL) { 1170 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1171 __FUNCTION__); 1172 continue; 1173 } 1174 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1175 laddr->ifa); 1176 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1177 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1178 continue; 1179 } 1180 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1181 /* possible, see if it matches */ 1182 struct sockaddr_in *intf_addr; 1183 1184 intf_addr = &laddr->ifa->address.sin; 1185 if (nam->sa_family == AF_INET) { 1186 if (sin->sin_addr.s_addr == 1187 intf_addr->sin_addr.s_addr) { 1188 SCTP_INP_RUNLOCK(inp); 1189 return (inp); 1190 } 1191 } else if (nam->sa_family == AF_INET6) { 1192 struct sockaddr_in6 *intf_addr6; 1193 1194 intf_addr6 = &laddr->ifa->address.sin6; 1195 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 1196 &intf_addr6->sin6_addr)) { 1197 SCTP_INP_RUNLOCK(inp); 1198 return (inp); 1199 } 1200 } 1201 } 1202 } 1203 SCTP_INP_RUNLOCK(inp); 1204 } 1205 return (NULL); 1206} 1207 1208 1209struct sctp_inpcb * 1210sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1211 uint32_t vrf_id) 1212{ 1213 /* 1214 * First we check the hash table to see if someone has this port 1215 * bound with just the port. 1216 */ 1217 struct sctp_inpcb *inp; 1218 struct sctppcbhead *head; 1219 struct sockaddr_in *sin; 1220 struct sockaddr_in6 *sin6; 1221 int lport; 1222 1223 if (nam->sa_family == AF_INET) { 1224 sin = (struct sockaddr_in *)nam; 1225 lport = ((struct sockaddr_in *)nam)->sin_port; 1226 } else if (nam->sa_family == AF_INET6) { 1227 sin6 = (struct sockaddr_in6 *)nam; 1228 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1229 } else { 1230 /* unsupported family */ 1231 return (NULL); 1232 } 1233 /* 1234 * I could cheat here and just cast to one of the types but we will 1235 * do it right. It also provides the check against an Unsupported 1236 * type too. 1237 */ 1238 /* Find the head of the ALLADDR chain */ 1239 if (have_lock == 0) { 1240 SCTP_INP_INFO_RLOCK(); 1241 1242 } 1243 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 1244 sctppcbinfo.hashmark)]; 1245 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1246 1247 /* 1248 * If the TCP model exists it could be that the main listening 1249 * endpoint is gone but there exists a connected socket for this guy 1250 * yet. If so we can return the first one that we find. This may NOT 1251 * be the correct one but the sctp_findassociation_ep_addr has 1252 * further code to look at all TCP models. 1253 */ 1254 if (inp == NULL && find_tcp_pool) { 1255 unsigned int i; 1256 1257 for (i = 0; i < sctppcbinfo.hashtblsize; i++) { 1258 /* 1259 * This is real gross, but we do NOT have a remote 1260 * port at this point depending on who is calling. 1261 * We must therefore look for ANY one that matches 1262 * our local port :/ 1263 */ 1264 head = &sctppcbinfo.sctp_tcpephash[i]; 1265 if (LIST_FIRST(head)) { 1266 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1267 if (inp) { 1268 /* Found one */ 1269 break; 1270 } 1271 } 1272 } 1273 } 1274 if (inp) { 1275 SCTP_INP_INCR_REF(inp); 1276 } 1277 if (have_lock == 0) { 1278 SCTP_INP_INFO_RUNLOCK(); 1279 } 1280 return (inp); 1281} 1282 1283/* 1284 * Find an association for an endpoint with the pointer to whom you want to 1285 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1286 * need to change the *to to some other struct like a mbuf... 1287 */ 1288struct sctp_tcb * 1289sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1290 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, uint32_t vrf_id) 1291{ 1292 struct sctp_inpcb *inp = NULL; 1293 struct sctp_tcb *retval; 1294 1295 SCTP_INP_INFO_RLOCK(); 1296 if (find_tcp_pool) { 1297 if (inp_p != NULL) { 1298 retval = sctp_tcb_special_locate(inp_p, from, to, netp, vrf_id); 1299 } else { 1300 retval = sctp_tcb_special_locate(&inp, from, to, netp, vrf_id); 1301 } 1302 if (retval != NULL) { 1303 SCTP_INP_INFO_RUNLOCK(); 1304 return (retval); 1305 } 1306 } 1307 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1308 if (inp_p != NULL) { 1309 *inp_p = inp; 1310 } 1311 SCTP_INP_INFO_RUNLOCK(); 1312 1313 if (inp == NULL) { 1314 return (NULL); 1315 } 1316 /* 1317 * ok, we have an endpoint, now lets find the assoc for it (if any) 1318 * we now place the source address or from in the to of the find 1319 * endpoint call. Since in reality this chain is used from the 1320 * inbound packet side. 1321 */ 1322 if (inp_p != NULL) { 1323 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL); 1324 } else { 1325 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, NULL); 1326 } 1327 return retval; 1328} 1329 1330 1331/* 1332 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1333 * find all addresses that the sender has specified in any address list. Each 1334 * address will be used to lookup the TCB and see if one exits. 1335 */ 1336static struct sctp_tcb * 1337sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1338 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1339 struct sockaddr *dest) 1340{ 1341 struct sockaddr_in sin4; 1342 struct sockaddr_in6 sin6; 1343 struct sctp_paramhdr *phdr, parm_buf; 1344 struct sctp_tcb *retval; 1345 uint32_t ptype, plen; 1346 1347 memset(&sin4, 0, sizeof(sin4)); 1348 memset(&sin6, 0, sizeof(sin6)); 1349 sin4.sin_len = sizeof(sin4); 1350 sin4.sin_family = AF_INET; 1351 sin4.sin_port = sh->src_port; 1352 sin6.sin6_len = sizeof(sin6); 1353 sin6.sin6_family = AF_INET6; 1354 sin6.sin6_port = sh->src_port; 1355 1356 retval = NULL; 1357 offset += sizeof(struct sctp_init_chunk); 1358 1359 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1360 while (phdr != NULL) { 1361 /* now we must see if we want the parameter */ 1362 ptype = ntohs(phdr->param_type); 1363 plen = ntohs(phdr->param_length); 1364 if (plen == 0) { 1365 break; 1366 } 1367 if (ptype == SCTP_IPV4_ADDRESS && 1368 plen == sizeof(struct sctp_ipv4addr_param)) { 1369 /* Get the rest of the address */ 1370 struct sctp_ipv4addr_param ip4_parm, *p4; 1371 1372 phdr = sctp_get_next_param(m, offset, 1373 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1374 if (phdr == NULL) { 1375 return (NULL); 1376 } 1377 p4 = (struct sctp_ipv4addr_param *)phdr; 1378 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 1379 /* look it up */ 1380 retval = sctp_findassociation_ep_addr(inp_p, 1381 (struct sockaddr *)&sin4, netp, dest, NULL); 1382 if (retval != NULL) { 1383 return (retval); 1384 } 1385 } else if (ptype == SCTP_IPV6_ADDRESS && 1386 plen == sizeof(struct sctp_ipv6addr_param)) { 1387 /* Get the rest of the address */ 1388 struct sctp_ipv6addr_param ip6_parm, *p6; 1389 1390 phdr = sctp_get_next_param(m, offset, 1391 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 1392 if (phdr == NULL) { 1393 return (NULL); 1394 } 1395 p6 = (struct sctp_ipv6addr_param *)phdr; 1396 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 1397 /* look it up */ 1398 retval = sctp_findassociation_ep_addr(inp_p, 1399 (struct sockaddr *)&sin6, netp, dest, NULL); 1400 if (retval != NULL) { 1401 return (retval); 1402 } 1403 } 1404 offset += SCTP_SIZE32(plen); 1405 phdr = sctp_get_next_param(m, offset, &parm_buf, 1406 sizeof(parm_buf)); 1407 } 1408 return (NULL); 1409} 1410 1411 1412static struct sctp_tcb * 1413sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag, 1414 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 1415 uint16_t lport, int skip_src_check) 1416{ 1417 /* 1418 * Use my vtag to hash. If we find it we then verify the source addr 1419 * is in the assoc. If all goes well we save a bit on rec of a 1420 * packet. 1421 */ 1422 struct sctpasochead *head; 1423 struct sctp_nets *net; 1424 struct sctp_tcb *stcb; 1425 1426 *netp = NULL; 1427 *inp_p = NULL; 1428 SCTP_INP_INFO_RLOCK(); 1429 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag, 1430 sctppcbinfo.hashasocmark)]; 1431 if (head == NULL) { 1432 /* invalid vtag */ 1433 SCTP_INP_INFO_RUNLOCK(); 1434 return (NULL); 1435 } 1436 LIST_FOREACH(stcb, head, sctp_asocs) { 1437 SCTP_INP_RLOCK(stcb->sctp_ep); 1438 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1439 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1440 continue; 1441 } 1442 SCTP_TCB_LOCK(stcb); 1443 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1444 if (stcb->asoc.my_vtag == vtag) { 1445 /* candidate */ 1446 if (stcb->rport != rport) { 1447 /* 1448 * we could remove this if vtags are unique 1449 * across the system. 1450 */ 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 if (stcb->sctp_ep->sctp_lport != lport) { 1455 /* 1456 * we could remove this if vtags are unique 1457 * across the system. 1458 */ 1459 SCTP_TCB_UNLOCK(stcb); 1460 continue; 1461 } 1462 if (skip_src_check) { 1463 *netp = NULL; /* unknown */ 1464 if (inp_p) 1465 *inp_p = stcb->sctp_ep; 1466 SCTP_INP_INFO_RUNLOCK(); 1467 return (stcb); 1468 } 1469 net = sctp_findnet(stcb, from); 1470 if (net) { 1471 /* yep its him. */ 1472 *netp = net; 1473 SCTP_STAT_INCR(sctps_vtagexpress); 1474 *inp_p = stcb->sctp_ep; 1475 SCTP_INP_INFO_RUNLOCK(); 1476 return (stcb); 1477 } else { 1478 /* 1479 * not him, this should only happen in rare 1480 * cases so I peg it. 1481 */ 1482 SCTP_STAT_INCR(sctps_vtagbogus); 1483 } 1484 } 1485 SCTP_TCB_UNLOCK(stcb); 1486 } 1487 SCTP_INP_INFO_RUNLOCK(); 1488 return (NULL); 1489} 1490 1491/* 1492 * Find an association with the pointer to the inbound IP packet. This can be 1493 * a IPv4 or IPv6 packet. 1494 */ 1495struct sctp_tcb * 1496sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 1497 struct sctphdr *sh, struct sctp_chunkhdr *ch, 1498 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 1499{ 1500 int find_tcp_pool; 1501 struct ip *iph; 1502 struct sctp_tcb *retval; 1503 struct sockaddr_storage to_store, from_store; 1504 struct sockaddr *to = (struct sockaddr *)&to_store; 1505 struct sockaddr *from = (struct sockaddr *)&from_store; 1506 struct sctp_inpcb *inp; 1507 1508 iph = mtod(m, struct ip *); 1509 if (iph->ip_v == IPVERSION) { 1510 /* its IPv4 */ 1511 struct sockaddr_in *from4; 1512 1513 from4 = (struct sockaddr_in *)&from_store; 1514 bzero(from4, sizeof(*from4)); 1515 from4->sin_family = AF_INET; 1516 from4->sin_len = sizeof(struct sockaddr_in); 1517 from4->sin_addr.s_addr = iph->ip_src.s_addr; 1518 from4->sin_port = sh->src_port; 1519 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1520 /* its IPv6 */ 1521 struct ip6_hdr *ip6; 1522 struct sockaddr_in6 *from6; 1523 1524 ip6 = mtod(m, struct ip6_hdr *); 1525 from6 = (struct sockaddr_in6 *)&from_store; 1526 bzero(from6, sizeof(*from6)); 1527 from6->sin6_family = AF_INET6; 1528 from6->sin6_len = sizeof(struct sockaddr_in6); 1529 from6->sin6_addr = ip6->ip6_src; 1530 from6->sin6_port = sh->src_port; 1531 /* Get the scopes in properly to the sin6 addr's */ 1532 /* we probably don't need these operations */ 1533 (void)sa6_recoverscope(from6); 1534 sa6_embedscope(from6, ip6_use_defzone); 1535 } else { 1536 /* Currently not supported. */ 1537 return (NULL); 1538 } 1539 if (sh->v_tag) { 1540 /* we only go down this path if vtag is non-zero */ 1541 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag), 1542 inp_p, netp, sh->src_port, sh->dest_port, 0); 1543 if (retval) { 1544 return (retval); 1545 } 1546 } 1547 if (iph->ip_v == IPVERSION) { 1548 /* its IPv4 */ 1549 struct sockaddr_in *to4; 1550 1551 to4 = (struct sockaddr_in *)&to_store; 1552 bzero(to4, sizeof(*to4)); 1553 to4->sin_family = AF_INET; 1554 to4->sin_len = sizeof(struct sockaddr_in); 1555 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 1556 to4->sin_port = sh->dest_port; 1557 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1558 /* its IPv6 */ 1559 struct ip6_hdr *ip6; 1560 struct sockaddr_in6 *to6; 1561 1562 ip6 = mtod(m, struct ip6_hdr *); 1563 to6 = (struct sockaddr_in6 *)&to_store; 1564 bzero(to6, sizeof(*to6)); 1565 to6->sin6_family = AF_INET6; 1566 to6->sin6_len = sizeof(struct sockaddr_in6); 1567 to6->sin6_addr = ip6->ip6_dst; 1568 to6->sin6_port = sh->dest_port; 1569 /* Get the scopes in properly to the sin6 addr's */ 1570 /* we probably don't need these operations */ 1571 (void)sa6_recoverscope(to6); 1572 sa6_embedscope(to6, ip6_use_defzone); 1573 } 1574 find_tcp_pool = 0; 1575 if ((ch->chunk_type != SCTP_INITIATION) && 1576 (ch->chunk_type != SCTP_INITIATION_ACK) && 1577 (ch->chunk_type != SCTP_COOKIE_ACK) && 1578 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 1579 /* Other chunk types go to the tcp pool. */ 1580 find_tcp_pool = 1; 1581 } 1582 if (inp_p) { 1583 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 1584 find_tcp_pool, vrf_id); 1585 inp = *inp_p; 1586 } else { 1587 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 1588 find_tcp_pool, vrf_id); 1589 } 1590 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 1591 if (retval == NULL && inp) { 1592 /* Found a EP but not this address */ 1593 if ((ch->chunk_type == SCTP_INITIATION) || 1594 (ch->chunk_type == SCTP_INITIATION_ACK)) { 1595 /*- 1596 * special hook, we do NOT return linp or an 1597 * association that is linked to an existing 1598 * association that is under the TCP pool (i.e. no 1599 * listener exists). The endpoint finding routine 1600 * will always find a listner before examining the 1601 * TCP pool. 1602 */ 1603 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 1604 if (inp_p) { 1605 *inp_p = NULL; 1606 } 1607 return (NULL); 1608 } 1609 retval = sctp_findassociation_special_addr(m, iphlen, 1610 offset, sh, &inp, netp, to); 1611 if (inp_p != NULL) { 1612 *inp_p = inp; 1613 } 1614 } 1615 } 1616 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 1617 return (retval); 1618} 1619 1620/* 1621 * lookup an association by an ASCONF lookup address. 1622 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 1623 */ 1624struct sctp_tcb * 1625sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 1626 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp) 1627{ 1628 struct sctp_tcb *stcb; 1629 struct sockaddr_in *sin; 1630 struct sockaddr_in6 *sin6; 1631 struct sockaddr_storage local_store, remote_store; 1632 struct ip *iph; 1633 struct sctp_paramhdr parm_buf, *phdr; 1634 int ptype; 1635 int zero_address = 0; 1636 1637 1638 memset(&local_store, 0, sizeof(local_store)); 1639 memset(&remote_store, 0, sizeof(remote_store)); 1640 1641 /* First get the destination address setup too. */ 1642 iph = mtod(m, struct ip *); 1643 if (iph->ip_v == IPVERSION) { 1644 /* its IPv4 */ 1645 sin = (struct sockaddr_in *)&local_store; 1646 sin->sin_family = AF_INET; 1647 sin->sin_len = sizeof(*sin); 1648 sin->sin_port = sh->dest_port; 1649 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 1650 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1651 /* its IPv6 */ 1652 struct ip6_hdr *ip6; 1653 1654 ip6 = mtod(m, struct ip6_hdr *); 1655 sin6 = (struct sockaddr_in6 *)&local_store; 1656 sin6->sin6_family = AF_INET6; 1657 sin6->sin6_len = sizeof(*sin6); 1658 sin6->sin6_port = sh->dest_port; 1659 sin6->sin6_addr = ip6->ip6_dst; 1660 } else { 1661 return NULL; 1662 } 1663 1664 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 1665 &parm_buf, sizeof(struct sctp_paramhdr)); 1666 if (phdr == NULL) { 1667 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 1668 __FUNCTION__); 1669 return NULL; 1670 } 1671 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 1672 /* get the correlation address */ 1673 if (ptype == SCTP_IPV6_ADDRESS) { 1674 /* ipv6 address param */ 1675 struct sctp_ipv6addr_param *p6, p6_buf; 1676 1677 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 1678 return NULL; 1679 } 1680 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 1681 offset + sizeof(struct sctp_asconf_chunk), 1682 &p6_buf.ph, sizeof(*p6)); 1683 if (p6 == NULL) { 1684 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 1685 __FUNCTION__); 1686 return (NULL); 1687 } 1688 sin6 = (struct sockaddr_in6 *)&remote_store; 1689 sin6->sin6_family = AF_INET6; 1690 sin6->sin6_len = sizeof(*sin6); 1691 sin6->sin6_port = sh->src_port; 1692 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 1693 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 1694 zero_address = 1; 1695 } else if (ptype == SCTP_IPV4_ADDRESS) { 1696 /* ipv4 address param */ 1697 struct sctp_ipv4addr_param *p4, p4_buf; 1698 1699 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 1700 return NULL; 1701 } 1702 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 1703 offset + sizeof(struct sctp_asconf_chunk), 1704 &p4_buf.ph, sizeof(*p4)); 1705 if (p4 == NULL) { 1706 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 1707 __FUNCTION__); 1708 return (NULL); 1709 } 1710 sin = (struct sockaddr_in *)&remote_store; 1711 sin->sin_family = AF_INET; 1712 sin->sin_len = sizeof(*sin); 1713 sin->sin_port = sh->src_port; 1714 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 1715 if (sin->sin_addr.s_addr == INADDR_ANY) 1716 zero_address = 1; 1717 } else { 1718 /* invalid address param type */ 1719 return NULL; 1720 } 1721 1722 if (zero_address) { 1723 stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p, 1724 netp, sh->src_port, sh->dest_port, 1); 1725 /* 1726 * printf("findassociation_ep_asconf: zero lookup address 1727 * finds stcb 0x%x\n", (uint32_t)stcb); 1728 */ 1729 } else { 1730 stcb = sctp_findassociation_ep_addr(inp_p, 1731 (struct sockaddr *)&remote_store, netp, 1732 (struct sockaddr *)&local_store, NULL); 1733 } 1734 return (stcb); 1735} 1736 1737 1738/* 1739 * allocate a sctp_inpcb and setup a temporary binding to a port/all 1740 * addresses. This way if we don't get a bind we by default pick a ephemeral 1741 * port with all addresses bound. 1742 */ 1743int 1744sctp_inpcb_alloc(struct socket *so) 1745{ 1746 /* 1747 * we get called when a new endpoint starts up. We need to allocate 1748 * the sctp_inpcb structure from the zone and init it. Mark it as 1749 * unbound and find a port that we can use as an ephemeral with 1750 * INADDR_ANY. If the user binds later no problem we can then add in 1751 * the specific addresses. And setup the default parameters for the 1752 * EP. 1753 */ 1754 int i, error; 1755 struct sctp_inpcb *inp; 1756 struct sctp_pcb *m; 1757 struct timeval time; 1758 sctp_sharedkey_t *null_key; 1759 1760 error = 0; 1761 1762 SCTP_INP_INFO_WLOCK(); 1763 inp = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep, struct sctp_inpcb); 1764 if (inp == NULL) { 1765 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 1766 SCTP_INP_INFO_WUNLOCK(); 1767 return (ENOBUFS); 1768 } 1769 /* zap it */ 1770 bzero(inp, sizeof(*inp)); 1771 1772 /* bump generations */ 1773 /* setup socket pointers */ 1774 inp->sctp_socket = so; 1775 inp->ip_inp.inp.inp_socket = so; 1776 1777 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 1778 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 1779 1780#ifdef IPSEC 1781 { 1782 struct inpcbpolicy *pcb_sp = NULL; 1783 1784 error = ipsec_init_pcbpolicy(so, &pcb_sp); 1785 /* Arrange to share the policy */ 1786 inp->ip_inp.inp.inp_sp = pcb_sp; 1787 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 1788 } 1789 if (error != 0) { 1790 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1791 SCTP_INP_INFO_WUNLOCK(); 1792 return error; 1793 } 1794#endif /* IPSEC */ 1795 SCTP_INCR_EP_COUNT(); 1796 inp->ip_inp.inp.inp_ip_ttl = ip_defttl; 1797 SCTP_INP_INFO_WUNLOCK(); 1798 1799 so->so_pcb = (caddr_t)inp; 1800 1801 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 1802 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 1803 /* UDP style socket */ 1804 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 1805 SCTP_PCB_FLAGS_UNBOUND); 1806 /* Be sure it is NON-BLOCKING IO for UDP */ 1807 /* SCTP_SET_SO_NBIO(so); */ 1808 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 1809 /* TCP style socket */ 1810 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 1811 SCTP_PCB_FLAGS_UNBOUND); 1812 /* Be sure we have blocking IO by default */ 1813 SCTP_CLEAR_SO_NBIO(so); 1814 } else { 1815 /* 1816 * unsupported socket type (RAW, etc)- in case we missed it 1817 * in protosw 1818 */ 1819 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1820 return (EOPNOTSUPP); 1821 } 1822 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 1823 1824 inp->sctp_tcbhash = SCTP_HASH_INIT(sctp_pcbtblsize, 1825 &inp->sctp_hashmark); 1826 if (inp->sctp_tcbhash == NULL) { 1827 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 1828 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1829 return (ENOBUFS); 1830 } 1831 inp->def_vrf_id = SCTP_DEFAULT_VRFID; 1832 1833 SCTP_INP_INFO_WLOCK(); 1834 SCTP_INP_LOCK_INIT(inp); 1835 SCTP_INP_READ_INIT(inp); 1836 SCTP_ASOC_CREATE_LOCK_INIT(inp); 1837 /* lock the new ep */ 1838 SCTP_INP_WLOCK(inp); 1839 1840 /* add it to the info area */ 1841 LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list); 1842 SCTP_INP_INFO_WUNLOCK(); 1843 1844 TAILQ_INIT(&inp->read_queue); 1845 LIST_INIT(&inp->sctp_addr_list); 1846 1847 LIST_INIT(&inp->sctp_asoc_list); 1848 1849#ifdef SCTP_TRACK_FREED_ASOCS 1850 /* TEMP CODE */ 1851 LIST_INIT(&inp->sctp_asoc_free_list); 1852#endif 1853 /* Init the timer structure for signature change */ 1854 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 1855 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 1856 1857 /* now init the actual endpoint default data */ 1858 m = &inp->sctp_ep; 1859 1860 /* setup the base timeout information */ 1861 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 1862 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 1863 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default); 1864 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default); 1865 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default); 1866 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default); 1867 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default); 1868 /* all max/min max are in ms */ 1869 m->sctp_maxrto = sctp_rto_max_default; 1870 m->sctp_minrto = sctp_rto_min_default; 1871 m->initial_rto = sctp_rto_initial_default; 1872 m->initial_init_rto_max = sctp_init_rto_max_default; 1873 m->sctp_sack_freq = sctp_sack_freq_default; 1874 1875 m->max_open_streams_intome = MAX_SCTP_STREAMS; 1876 1877 m->max_init_times = sctp_init_rtx_max_default; 1878 m->max_send_times = sctp_assoc_rtx_max_default; 1879 m->def_net_failure = sctp_path_rtx_max_default; 1880 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 1881 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 1882 m->max_burst = sctp_max_burst_default; 1883 /* number of streams to pre-open on a association */ 1884 m->pre_open_stream_count = sctp_nr_outgoing_streams_default; 1885 1886 /* Add adaptation cookie */ 1887 m->adaptation_layer_indicator = 0x504C5253; 1888 1889 /* seed random number generator */ 1890 m->random_counter = 1; 1891 m->store_at = SCTP_SIGNATURE_SIZE; 1892 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 1893 sctp_fill_random_store(m); 1894 1895 /* Minimum cookie size */ 1896 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 1897 sizeof(struct sctp_state_cookie); 1898 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 1899 1900 /* Setup the initial secret */ 1901 (void)SCTP_GETTIME_TIMEVAL(&time); 1902 m->time_of_secret_change = time.tv_sec; 1903 1904 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 1905 m->secret_key[0][i] = sctp_select_initial_TSN(m); 1906 } 1907 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 1908 1909 /* How long is a cookie good for ? */ 1910 m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default); 1911 /* 1912 * Initialize authentication parameters 1913 */ 1914 m->local_hmacs = sctp_default_supported_hmaclist(); 1915 m->local_auth_chunks = sctp_alloc_chunklist(); 1916 sctp_auth_set_default_chunks(m->local_auth_chunks); 1917 LIST_INIT(&m->shared_keys); 1918 /* add default NULL key as key id 0 */ 1919 null_key = sctp_alloc_sharedkey(); 1920 sctp_insert_sharedkey(&m->shared_keys, null_key); 1921 SCTP_INP_WUNLOCK(inp); 1922#ifdef SCTP_LOG_CLOSING 1923 sctp_log_closing(inp, NULL, 12); 1924#endif 1925 return (error); 1926} 1927 1928 1929void 1930sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 1931 struct sctp_tcb *stcb) 1932{ 1933 struct sctp_nets *net; 1934 uint16_t lport, rport; 1935 struct sctppcbhead *head; 1936 struct sctp_laddr *laddr, *oladdr; 1937 1938 SCTP_TCB_UNLOCK(stcb); 1939 SCTP_INP_INFO_WLOCK(); 1940 SCTP_INP_WLOCK(old_inp); 1941 SCTP_INP_WLOCK(new_inp); 1942 SCTP_TCB_LOCK(stcb); 1943 1944 new_inp->sctp_ep.time_of_secret_change = 1945 old_inp->sctp_ep.time_of_secret_change; 1946 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 1947 sizeof(old_inp->sctp_ep.secret_key)); 1948 new_inp->sctp_ep.current_secret_number = 1949 old_inp->sctp_ep.current_secret_number; 1950 new_inp->sctp_ep.last_secret_number = 1951 old_inp->sctp_ep.last_secret_number; 1952 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 1953 1954 /* make it so new data pours into the new socket */ 1955 stcb->sctp_socket = new_inp->sctp_socket; 1956 stcb->sctp_ep = new_inp; 1957 1958 /* Copy the port across */ 1959 lport = new_inp->sctp_lport = old_inp->sctp_lport; 1960 rport = stcb->rport; 1961 /* Pull the tcb from the old association */ 1962 LIST_REMOVE(stcb, sctp_tcbhash); 1963 LIST_REMOVE(stcb, sctp_tcblist); 1964 1965 /* Now insert the new_inp into the TCP connected hash */ 1966 head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport), 1967 sctppcbinfo.hashtcpmark)]; 1968 1969 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 1970 /* Its safe to access */ 1971 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 1972 1973 /* Now move the tcb into the endpoint list */ 1974 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 1975 /* 1976 * Question, do we even need to worry about the ep-hash since we 1977 * only have one connection? Probably not :> so lets get rid of it 1978 * and not suck up any kernel memory in that. 1979 */ 1980 1981 /* Ok. Let's restart timer. */ 1982 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1983 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 1984 stcb, net); 1985 } 1986 1987 SCTP_INP_INFO_WUNLOCK(); 1988 if (new_inp->sctp_tcbhash != NULL) { 1989 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 1990 new_inp->sctp_tcbhash = NULL; 1991 } 1992 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1993 /* Subset bound, so copy in the laddr list from the old_inp */ 1994 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 1995 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 1996 if (laddr == NULL) { 1997 /* 1998 * Gak, what can we do? This assoc is really 1999 * HOSED. We probably should send an abort 2000 * here. 2001 */ 2002 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2003 continue; 2004 } 2005 SCTP_INCR_LADDR_COUNT(); 2006 bzero(laddr, sizeof(*laddr)); 2007 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2008 laddr->ifa = oladdr->ifa; 2009 atomic_add_int(&laddr->ifa->refcount, 1); 2010 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2011 sctp_nxt_addr); 2012 new_inp->laddr_count++; 2013 } 2014 } 2015 /* 2016 * Now any running timers need to be adjusted since we really don't 2017 * care if they are running or not just blast in the new_inp into 2018 * all of them. 2019 */ 2020 2021 stcb->asoc.hb_timer.ep = (void *)new_inp; 2022 stcb->asoc.dack_timer.ep = (void *)new_inp; 2023 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2024 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2025 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2026 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2027 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2028 /* now what about the nets? */ 2029 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2030 net->pmtu_timer.ep = (void *)new_inp; 2031 net->rxt_timer.ep = (void *)new_inp; 2032 net->fr_timer.ep = (void *)new_inp; 2033 } 2034 SCTP_INP_WUNLOCK(new_inp); 2035 SCTP_INP_WUNLOCK(old_inp); 2036} 2037 2038static int 2039sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 2040{ 2041 struct sctppcbhead *head; 2042 struct sctp_inpcb *t_inp; 2043 int fnd; 2044 2045 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 2046 sctppcbinfo.hashmark)]; 2047 LIST_FOREACH(t_inp, head, sctp_hash) { 2048 if (t_inp->sctp_lport != lport) { 2049 continue; 2050 } 2051 /* is it in the VRF in question */ 2052 fnd = 0; 2053 if (t_inp->def_vrf_id == vrf_id) 2054 fnd = 1; 2055 if (!fnd) 2056 continue; 2057 2058 /* This one is in use. */ 2059 /* check the v6/v4 binding issue */ 2060 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2061 SCTP_IPV6_V6ONLY(t_inp)) { 2062 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2063 /* collision in V6 space */ 2064 return (1); 2065 } else { 2066 /* inp is BOUND_V4 no conflict */ 2067 continue; 2068 } 2069 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2070 /* t_inp is bound v4 and v6, conflict always */ 2071 return (1); 2072 } else { 2073 /* t_inp is bound only V4 */ 2074 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2075 SCTP_IPV6_V6ONLY(inp)) { 2076 /* no conflict */ 2077 continue; 2078 } 2079 /* else fall through to conflict */ 2080 } 2081 return (1); 2082 } 2083 return (0); 2084} 2085 2086 2087 2088int 2089sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 2090{ 2091 /* bind a ep to a socket address */ 2092 struct sctppcbhead *head; 2093 struct sctp_inpcb *inp, *inp_tmp; 2094 struct inpcb *ip_inp; 2095 int bindall; 2096 uint16_t lport; 2097 int error; 2098 uint32_t vrf_id; 2099 2100 lport = 0; 2101 error = 0; 2102 bindall = 1; 2103 inp = (struct sctp_inpcb *)so->so_pcb; 2104 ip_inp = (struct inpcb *)so->so_pcb; 2105#ifdef SCTP_DEBUG 2106 if (addr) { 2107 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2108 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2109 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2110 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2111 } 2112#endif 2113 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2114 /* already did a bind, subsequent binds NOT allowed ! */ 2115 return (EINVAL); 2116 } 2117 if (addr != NULL) { 2118 if (addr->sa_family == AF_INET) { 2119 struct sockaddr_in *sin; 2120 2121 /* IPV6_V6ONLY socket? */ 2122 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2123 return (EINVAL); 2124 } 2125 if (addr->sa_len != sizeof(*sin)) 2126 return (EINVAL); 2127 2128 sin = (struct sockaddr_in *)addr; 2129 lport = sin->sin_port; 2130 2131 if (sin->sin_addr.s_addr != INADDR_ANY) { 2132 bindall = 0; 2133 } 2134 } else if (addr->sa_family == AF_INET6) { 2135 /* Only for pure IPv6 Address. (No IPv4 Mapped!) */ 2136 struct sockaddr_in6 *sin6; 2137 2138 sin6 = (struct sockaddr_in6 *)addr; 2139 2140 if (addr->sa_len != sizeof(*sin6)) 2141 return (EINVAL); 2142 2143 lport = sin6->sin6_port; 2144 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2145 bindall = 0; 2146 /* KAME hack: embed scopeid */ 2147 if (sa6_embedscope(sin6, ip6_use_defzone) != 0) 2148 return (EINVAL); 2149 } 2150 /* this must be cleared for ifa_ifwithaddr() */ 2151 sin6->sin6_scope_id = 0; 2152 } else { 2153 return (EAFNOSUPPORT); 2154 } 2155 } 2156 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2157 vrf_id = inp->def_vrf_id; 2158 2159 SCTP_INP_INFO_WLOCK(); 2160 SCTP_INP_WLOCK(inp); 2161 /* increase our count due to the unlock we do */ 2162 SCTP_INP_INCR_REF(inp); 2163 if (lport) { 2164 /* 2165 * Did the caller specify a port? if so we must see if a ep 2166 * already has this one bound. 2167 */ 2168 /* got to be root to get at low ports */ 2169 if (ntohs(lport) < IPPORT_RESERVED) { 2170 if (p && (error = 2171 priv_check_cred(p->td_ucred, 2172 PRIV_NETINET_RESERVEDPORT, 2173 SUSER_ALLOWJAIL 2174 ) 2175 )) { 2176 SCTP_INP_DECR_REF(inp); 2177 SCTP_INP_WUNLOCK(inp); 2178 SCTP_INP_INFO_WUNLOCK(); 2179 return (error); 2180 } 2181 } 2182 if (p == NULL) { 2183 SCTP_INP_DECR_REF(inp); 2184 SCTP_INP_WUNLOCK(inp); 2185 SCTP_INP_INFO_WUNLOCK(); 2186 return (error); 2187 } 2188 SCTP_INP_WUNLOCK(inp); 2189 if (bindall) { 2190 vrf_id = inp->def_vrf_id; 2191 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2192 if (inp_tmp != NULL) { 2193 /* 2194 * lock guy returned and lower count note 2195 * that we are not bound so inp_tmp should 2196 * NEVER be inp. And it is this inp 2197 * (inp_tmp) that gets the reference bump, 2198 * so we must lower it. 2199 */ 2200 SCTP_INP_DECR_REF(inp_tmp); 2201 SCTP_INP_DECR_REF(inp); 2202 /* unlock info */ 2203 SCTP_INP_INFO_WUNLOCK(); 2204 return (EADDRINUSE); 2205 } 2206 } else { 2207 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2208 if (inp_tmp != NULL) { 2209 /* 2210 * lock guy returned and lower count note 2211 * that we are not bound so inp_tmp should 2212 * NEVER be inp. And it is this inp 2213 * (inp_tmp) that gets the reference bump, 2214 * so we must lower it. 2215 */ 2216 SCTP_INP_DECR_REF(inp_tmp); 2217 SCTP_INP_DECR_REF(inp); 2218 /* unlock info */ 2219 SCTP_INP_INFO_WUNLOCK(); 2220 return (EADDRINUSE); 2221 } 2222 } 2223 SCTP_INP_WLOCK(inp); 2224 if (bindall) { 2225 /* verify that no lport is not used by a singleton */ 2226 if (sctp_isport_inuse(inp, lport, vrf_id)) { 2227 /* Sorry someone already has this one bound */ 2228 SCTP_INP_DECR_REF(inp); 2229 SCTP_INP_WUNLOCK(inp); 2230 SCTP_INP_INFO_WUNLOCK(); 2231 return (EADDRINUSE); 2232 } 2233 } 2234 } else { 2235 uint16_t first, last, candiate; 2236 uint16_t count; 2237 int done; 2238 2239 if (ip_inp->inp_flags & INP_HIGHPORT) { 2240 first = ipport_hifirstauto; 2241 last = ipport_hilastauto; 2242 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2243 if (p && (error = 2244 priv_check_cred(p->td_ucred, 2245 PRIV_NETINET_RESERVEDPORT, 2246 SUSER_ALLOWJAIL 2247 ) 2248 )) { 2249 SCTP_INP_DECR_REF(inp); 2250 SCTP_INP_WUNLOCK(inp); 2251 SCTP_INP_INFO_WUNLOCK(); 2252 return (error); 2253 } 2254 first = ipport_lowfirstauto; 2255 last = ipport_lowlastauto; 2256 } else { 2257 first = ipport_firstauto; 2258 last = ipport_lastauto; 2259 } 2260 if (first > last) { 2261 uint16_t temp; 2262 2263 temp = first; 2264 first = last; 2265 last = temp; 2266 } 2267 count = last - first + 1; /* number of candidates */ 2268 candiate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2269 2270 done = 0; 2271 while (!done) { 2272 if (sctp_isport_inuse(inp, htons(candiate), inp->def_vrf_id) == 0) { 2273 done = 1; 2274 } 2275 if (!done) { 2276 if (--count == 0) { 2277 SCTP_INP_DECR_REF(inp); 2278 SCTP_INP_WUNLOCK(inp); 2279 SCTP_INP_INFO_WUNLOCK(); 2280 return (EADDRINUSE); 2281 } 2282 if (candiate == last) 2283 candiate = first; 2284 else 2285 candiate = candiate + 1; 2286 } 2287 } 2288 lport = htons(candiate); 2289 } 2290 SCTP_INP_DECR_REF(inp); 2291 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2292 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2293 /* 2294 * this really should not happen. The guy did a non-blocking 2295 * bind and then did a close at the same time. 2296 */ 2297 SCTP_INP_WUNLOCK(inp); 2298 SCTP_INP_INFO_WUNLOCK(); 2299 return (EINVAL); 2300 } 2301 /* ok we look clear to give out this port, so lets setup the binding */ 2302 if (bindall) { 2303 /* binding to all addresses, so just set in the proper flags */ 2304 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2305 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2306 /* set the automatic addr changes from kernel flag */ 2307 if (sctp_auto_asconf == 0) { 2308 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2309 } else { 2310 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2311 } 2312 } else { 2313 /* 2314 * bind specific, make sure flags is off and add a new 2315 * address structure to the sctp_addr_list inside the ep 2316 * structure. 2317 * 2318 * We will need to allocate one and insert it at the head. The 2319 * socketopt call can just insert new addresses in there as 2320 * well. It will also have to do the embed scope kame hack 2321 * too (before adding). 2322 */ 2323 struct sctp_ifa *ifa; 2324 struct sockaddr_storage store_sa; 2325 2326 memset(&store_sa, 0, sizeof(store_sa)); 2327 if (addr->sa_family == AF_INET) { 2328 struct sockaddr_in *sin; 2329 2330 sin = (struct sockaddr_in *)&store_sa; 2331 memcpy(sin, addr, sizeof(struct sockaddr_in)); 2332 sin->sin_port = 0; 2333 } else if (addr->sa_family == AF_INET6) { 2334 struct sockaddr_in6 *sin6; 2335 2336 sin6 = (struct sockaddr_in6 *)&store_sa; 2337 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 2338 sin6->sin6_port = 0; 2339 } 2340 /* 2341 * first find the interface with the bound address need to 2342 * zero out the port to find the address! yuck! can't do 2343 * this earlier since need port for sctp_pcb_findep() 2344 */ 2345 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 2346 vrf_id, 0); 2347 if (ifa == NULL) { 2348 /* Can't find an interface with that address */ 2349 SCTP_INP_WUNLOCK(inp); 2350 SCTP_INP_INFO_WUNLOCK(); 2351 return (EADDRNOTAVAIL); 2352 } 2353 if (addr->sa_family == AF_INET6) { 2354 /* GAK, more FIXME IFA lock? */ 2355 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2356 /* Can't bind a non-existent addr. */ 2357 SCTP_INP_WUNLOCK(inp); 2358 SCTP_INP_INFO_WUNLOCK(); 2359 return (EINVAL); 2360 } 2361 } 2362 /* we're not bound all */ 2363 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 2364 /* allow bindx() to send ASCONF's for binding changes */ 2365 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2366 /* set the automatic addr changes from kernel flag */ 2367 if (sctp_auto_asconf == 0) { 2368 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2369 } else { 2370 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2371 } 2372 2373 /* add this address to the endpoint list */ 2374 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 2375 if (error != 0) { 2376 SCTP_INP_WUNLOCK(inp); 2377 SCTP_INP_INFO_WUNLOCK(); 2378 return (error); 2379 } 2380 inp->laddr_count++; 2381 } 2382 /* find the bucket */ 2383 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 2384 sctppcbinfo.hashmark)]; 2385 /* put it in the bucket */ 2386 LIST_INSERT_HEAD(head, inp, sctp_hash); 2387 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n", 2388 head, ntohs(lport)); 2389 /* set in the port */ 2390 inp->sctp_lport = lport; 2391 2392 /* turn off just the unbound flag */ 2393 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2394 SCTP_INP_WUNLOCK(inp); 2395 SCTP_INP_INFO_WUNLOCK(); 2396 return (0); 2397} 2398 2399 2400static void 2401sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next) 2402{ 2403 struct sctp_iterator *it; 2404 2405 /* 2406 * We enter with the only the ITERATOR_LOCK in place and a write 2407 * lock on the inp_info stuff. 2408 */ 2409 2410 /* 2411 * Go through all iterators, we must do this since it is possible 2412 * that some iterator does NOT have the lock, but is waiting for it. 2413 * And the one that had the lock has either moved in the last 2414 * iteration or we just cleared it above. We need to find all of 2415 * those guys. The list of iterators should never be very big 2416 * though. 2417 */ 2418 TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) { 2419 if (it == inp->inp_starting_point_for_iterator) 2420 /* skip this guy, he's special */ 2421 continue; 2422 if (it->inp == inp) { 2423 /* 2424 * This is tricky and we DON'T lock the iterator. 2425 * Reason is he's running but waiting for me since 2426 * inp->inp_starting_point_for_iterator has the lock 2427 * on me (the guy above we skipped). This tells us 2428 * its is not running but waiting for 2429 * inp->inp_starting_point_for_iterator to be 2430 * released by the guy that does have our INP in a 2431 * lock. 2432 */ 2433 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 2434 it->inp = NULL; 2435 it->stcb = NULL; 2436 } else { 2437 /* set him up to do the next guy not me */ 2438 it->inp = inp_next; 2439 it->stcb = NULL; 2440 } 2441 } 2442 } 2443 it = inp->inp_starting_point_for_iterator; 2444 if (it) { 2445 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 2446 it->inp = NULL; 2447 } else { 2448 it->inp = inp_next; 2449 } 2450 it->stcb = NULL; 2451 } 2452} 2453 2454/* release sctp_inpcb unbind the port */ 2455void 2456sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 2457{ 2458 /* 2459 * Here we free a endpoint. We must find it (if it is in the Hash 2460 * table) and remove it from there. Then we must also find it in the 2461 * overall list and remove it from there. After all removals are 2462 * complete then any timer has to be stopped. Then start the actual 2463 * freeing. a) Any local lists. b) Any associations. c) The hash of 2464 * all associations. d) finally the ep itself. 2465 */ 2466 struct sctp_pcb *m; 2467 struct sctp_inpcb *inp_save; 2468 struct sctp_tcb *asoc, *nasoc; 2469 struct sctp_laddr *laddr, *nladdr; 2470 struct inpcb *ip_pcb; 2471 struct socket *so; 2472 2473 struct sctp_queued_to_read *sq; 2474 2475 2476 int cnt; 2477 sctp_sharedkey_t *shared_key; 2478 2479 2480#ifdef SCTP_LOG_CLOSING 2481 sctp_log_closing(inp, NULL, 0); 2482#endif 2483 2484 SCTP_ITERATOR_LOCK(); 2485 so = inp->sctp_socket; 2486 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2487 /* been here before.. eeks.. get out of here */ 2488 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 2489 SCTP_ITERATOR_UNLOCK(); 2490#ifdef SCTP_LOG_CLOSING 2491 sctp_log_closing(inp, NULL, 1); 2492#endif 2493 return; 2494 } 2495 SCTP_ASOC_CREATE_LOCK(inp); 2496 SCTP_INP_INFO_WLOCK(); 2497 2498 SCTP_INP_WLOCK(inp); 2499 /* First time through we have the socket lock, after that no more. */ 2500 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 2501 /* 2502 * Once we are in we can remove the flag from = 1 is only 2503 * passed from the actual closing routines that are called 2504 * via the sockets layer. 2505 */ 2506 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 2507 } 2508 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 2509 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 2510 2511 if (inp->control) { 2512 sctp_m_freem(inp->control); 2513 inp->control = NULL; 2514 } 2515 if (inp->pkt) { 2516 sctp_m_freem(inp->pkt); 2517 inp->pkt = NULL; 2518 } 2519 m = &inp->sctp_ep; 2520 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 2521 * here but I will be nice :> (i.e. 2522 * ip_pcb = ep;) */ 2523 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 2524 int cnt_in_sd; 2525 2526 cnt_in_sd = 0; 2527 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 2528 asoc = nasoc) { 2529 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2530 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2531 /* Skip guys being freed */ 2532 asoc->sctp_socket = NULL; 2533 cnt_in_sd++; 2534 continue; 2535 } 2536 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 2537 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 2538 /* Just abandon things in the front states */ 2539 if (asoc->asoc.total_output_queue_size == 0) { 2540 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2); 2541 continue; 2542 } 2543 } 2544 SCTP_TCB_LOCK(asoc); 2545 /* Disconnect the socket please */ 2546 asoc->sctp_socket = NULL; 2547 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 2548 if ((asoc->asoc.size_on_reasm_queue > 0) || 2549 (asoc->asoc.control_pdapi) || 2550 (asoc->asoc.size_on_all_streams > 0) || 2551 (so && (so->so_rcv.sb_cc > 0)) 2552 ) { 2553 /* Left with Data unread */ 2554 struct mbuf *op_err; 2555 2556 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2557 0, M_DONTWAIT, 1, MT_DATA); 2558 if (op_err) { 2559 /* Fill in the user initiated abort */ 2560 struct sctp_paramhdr *ph; 2561 uint32_t *ippp; 2562 2563 SCTP_BUF_LEN(op_err) = 2564 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 2565 ph = mtod(op_err, 2566 struct sctp_paramhdr *); 2567 ph->param_type = htons( 2568 SCTP_CAUSE_USER_INITIATED_ABT); 2569 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2570 ippp = (uint32_t *) (ph + 1); 2571 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 2572 } 2573 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 2574 sctp_send_abort_tcb(asoc, op_err); 2575 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2576 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2577 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2578 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2579 } 2580 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4); 2581 continue; 2582 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 2583 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 2584 (asoc->asoc.stream_queue_cnt == 0) 2585 ) { 2586 if (asoc->asoc.locked_on_sending) { 2587 goto abort_anyway; 2588 } 2589 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 2590 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 2591 /* 2592 * there is nothing queued to send, 2593 * so I send shutdown 2594 */ 2595 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 2596 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2597 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2598 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2599 } 2600 asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT; 2601 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 2602 asoc->asoc.primary_destination); 2603 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 2604 asoc->asoc.primary_destination); 2605 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR); 2606 } 2607 } else { 2608 /* mark into shutdown pending */ 2609 struct sctp_stream_queue_pending *sp; 2610 2611 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 2612 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 2613 asoc->asoc.primary_destination); 2614 if (asoc->asoc.locked_on_sending) { 2615 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 2616 sctp_streamhead); 2617 if (sp == NULL) { 2618 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 2619 asoc->asoc.locked_on_sending, 2620 asoc->asoc.locked_on_sending->stream_no); 2621 } else { 2622 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 2623 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 2624 } 2625 } 2626 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 2627 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 2628 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 2629 struct mbuf *op_err; 2630 2631 abort_anyway: 2632 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2633 0, M_DONTWAIT, 1, MT_DATA); 2634 if (op_err) { 2635 /* 2636 * Fill in the user 2637 * initiated abort 2638 */ 2639 struct sctp_paramhdr *ph; 2640 uint32_t *ippp; 2641 2642 SCTP_BUF_LEN(op_err) = 2643 (sizeof(struct sctp_paramhdr) + 2644 sizeof(uint32_t)); 2645 ph = mtod(op_err, 2646 struct sctp_paramhdr *); 2647 ph->param_type = htons( 2648 SCTP_CAUSE_USER_INITIATED_ABT); 2649 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2650 ippp = (uint32_t *) (ph + 1); 2651 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 2652 } 2653 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 2654 sctp_send_abort_tcb(asoc, op_err); 2655 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2656 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2657 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2658 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2659 } 2660 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6); 2661 continue; 2662 } 2663 } 2664 cnt_in_sd++; 2665 SCTP_TCB_UNLOCK(asoc); 2666 } 2667 /* now is there some left in our SHUTDOWN state? */ 2668 if (cnt_in_sd) { 2669 SCTP_INP_WUNLOCK(inp); 2670 SCTP_ASOC_CREATE_UNLOCK(inp); 2671 SCTP_INP_INFO_WUNLOCK(); 2672 SCTP_ITERATOR_UNLOCK(); 2673#ifdef SCTP_LOG_CLOSING 2674 sctp_log_closing(inp, NULL, 2); 2675#endif 2676 return; 2677 } 2678 } 2679 inp->sctp_socket = NULL; 2680 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 2681 SCTP_PCB_FLAGS_UNBOUND) { 2682 /* 2683 * ok, this guy has been bound. It's port is somewhere in 2684 * the sctppcbinfo hash table. Remove it! 2685 */ 2686 LIST_REMOVE(inp, sctp_hash); 2687 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 2688 } 2689 /* 2690 * If there is a timer running to kill us, forget it, since it may 2691 * have a contest on the INP lock.. which would cause us to die ... 2692 */ 2693 cnt = 0; 2694 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 2695 asoc = nasoc) { 2696 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2697 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2698 cnt++; 2699 continue; 2700 } 2701 /* Free associations that are NOT killing us */ 2702 SCTP_TCB_LOCK(asoc); 2703 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 2704 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 2705 struct mbuf *op_err; 2706 uint32_t *ippp; 2707 2708 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2709 0, M_DONTWAIT, 1, MT_DATA); 2710 if (op_err) { 2711 /* Fill in the user initiated abort */ 2712 struct sctp_paramhdr *ph; 2713 2714 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 2715 sizeof(uint32_t)); 2716 ph = mtod(op_err, struct sctp_paramhdr *); 2717 ph->param_type = htons( 2718 SCTP_CAUSE_USER_INITIATED_ABT); 2719 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2720 ippp = (uint32_t *) (ph + 1); 2721 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 2722 2723 } 2724 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 2725 sctp_send_abort_tcb(asoc, op_err); 2726 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2727 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2728 cnt++; 2729 SCTP_TCB_UNLOCK(asoc); 2730 continue; 2731 } 2732 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2733 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2734 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2735 } 2736 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8); 2737 } 2738 if (cnt) { 2739 /* Ok we have someone out there that will kill us */ 2740 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2741 SCTP_INP_WUNLOCK(inp); 2742 SCTP_ASOC_CREATE_UNLOCK(inp); 2743 SCTP_INP_INFO_WUNLOCK(); 2744 SCTP_ITERATOR_UNLOCK(); 2745#ifdef SCTP_LOG_CLOSING 2746 sctp_log_closing(inp, NULL, 3); 2747#endif 2748 return; 2749 } 2750 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 2751 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2752 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 2753 SCTP_INP_WUNLOCK(inp); 2754 SCTP_ASOC_CREATE_UNLOCK(inp); 2755 SCTP_INP_INFO_WUNLOCK(); 2756 SCTP_ITERATOR_UNLOCK(); 2757#ifdef SCTP_LOG_CLOSING 2758 sctp_log_closing(inp, NULL, 4); 2759#endif 2760 return; 2761 } 2762 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2763 inp->sctp_ep.signature_change.type = 0; 2764 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 2765 2766#ifdef SCTP_LOG_CLOSING 2767 sctp_log_closing(inp, NULL, 5); 2768#endif 2769 2770 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2771 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE; 2772 /* Clear the read queue */ 2773 /* sa_ignore FREED_MEMORY */ 2774 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { 2775 /* Its only abandoned if it had data left */ 2776 if (sq->length) 2777 SCTP_STAT_INCR(sctps_left_abandon); 2778 2779 TAILQ_REMOVE(&inp->read_queue, sq, next); 2780 sctp_free_remote_addr(sq->whoFrom); 2781 if (so) 2782 so->so_rcv.sb_cc -= sq->length; 2783 if (sq->data) { 2784 sctp_m_freem(sq->data); 2785 sq->data = NULL; 2786 } 2787 /* 2788 * no need to free the net count, since at this point all 2789 * assoc's are gone. 2790 */ 2791 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); 2792 SCTP_DECR_READQ_COUNT(); 2793 } 2794 /* Now the sctp_pcb things */ 2795 /* 2796 * free each asoc if it is not already closed/free. we can't use the 2797 * macro here since le_next will get freed as part of the 2798 * sctp_free_assoc() call. 2799 */ 2800 cnt = 0; 2801 if (so) { 2802#ifdef IPSEC 2803 ipsec4_delete_pcbpolicy(ip_pcb); 2804#endif /* IPSEC */ 2805 2806 /* Unlocks not needed since the socket is gone now */ 2807 } 2808 if (ip_pcb->inp_options) { 2809 (void)sctp_m_free(ip_pcb->inp_options); 2810 ip_pcb->inp_options = 0; 2811 } 2812 if (ip_pcb->inp_moptions) { 2813 ip_freemoptions(ip_pcb->inp_moptions); 2814 ip_pcb->inp_moptions = 0; 2815 } 2816#ifdef INET6 2817 if (ip_pcb->inp_vflag & INP_IPV6) { 2818 struct in6pcb *in6p; 2819 2820 in6p = (struct in6pcb *)inp; 2821 ip6_freepcbopts(in6p->in6p_outputopts); 2822 } 2823#endif /* INET6 */ 2824 ip_pcb->inp_vflag = 0; 2825 /* free up authentication fields */ 2826 if (inp->sctp_ep.local_auth_chunks != NULL) 2827 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 2828 if (inp->sctp_ep.local_hmacs != NULL) 2829 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 2830 2831 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 2832 while (shared_key) { 2833 LIST_REMOVE(shared_key, next); 2834 sctp_free_sharedkey(shared_key); 2835 /* sa_ignore FREED_MEMORY */ 2836 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 2837 } 2838 2839 inp_save = LIST_NEXT(inp, sctp_list); 2840 LIST_REMOVE(inp, sctp_list); 2841 2842 /* fix any iterators only after out of the list */ 2843 sctp_iterator_inp_being_freed(inp, inp_save); 2844 /* 2845 * if we have an address list the following will free the list of 2846 * ifaddr's that are set into this ep. Again macro limitations here, 2847 * since the LIST_FOREACH could be a bad idea. 2848 */ 2849 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; 2850 laddr = nladdr) { 2851 nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 2852 sctp_remove_laddr(laddr); 2853 } 2854 2855#ifdef SCTP_TRACK_FREED_ASOCS 2856 /* TEMP CODE */ 2857 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; 2858 asoc = nasoc) { 2859 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2860 LIST_REMOVE(asoc, sctp_tcblist); 2861 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc); 2862 SCTP_DECR_ASOC_COUNT(); 2863 } 2864 /* *** END TEMP CODE *** */ 2865#endif 2866 /* Now lets see about freeing the EP hash table. */ 2867 if (inp->sctp_tcbhash != NULL) { 2868 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 2869 inp->sctp_tcbhash = NULL; 2870 } 2871 /* Now we must put the ep memory back into the zone pool */ 2872 SCTP_INP_LOCK_DESTROY(inp); 2873 SCTP_INP_READ_DESTROY(inp); 2874 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 2875 SCTP_INP_INFO_WUNLOCK(); 2876 2877 SCTP_ITERATOR_UNLOCK(); 2878 2879 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 2880 SCTP_DECR_EP_COUNT(); 2881 2882} 2883 2884 2885struct sctp_nets * 2886sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 2887{ 2888 struct sctp_nets *net; 2889 2890 /* locate the address */ 2891 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2892 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 2893 return (net); 2894 } 2895 return (NULL); 2896} 2897 2898 2899int 2900sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 2901{ 2902 struct sctp_ifa *sctp_ifa; 2903 2904 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0); 2905 if (sctp_ifa) { 2906 return (1); 2907 } else { 2908 return (0); 2909 } 2910} 2911 2912void 2913sctp_set_initial_cc_param(struct sctp_tcb *stcb, struct sctp_nets *net) 2914{ 2915 net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND)); 2916 /* we always get at LEAST 2 MTU's */ 2917 if (net->cwnd < (2 * net->mtu)) { 2918 net->cwnd = 2 * net->mtu; 2919 } 2920 net->ssthresh = stcb->asoc.peers_rwnd; 2921} 2922 2923 2924 2925/* 2926 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 2927 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 2928 * stats of stuff. 2929 */ 2930int 2931sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 2932 int set_scope, int from) 2933{ 2934 /* 2935 * The following is redundant to the same lines in the 2936 * sctp_aloc_assoc() but is needed since other's call the add 2937 * address function 2938 */ 2939 struct sctp_nets *net, *netfirst; 2940 int addr_inscope; 2941 2942 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 2943 from); 2944 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 2945 2946 netfirst = sctp_findnet(stcb, newaddr); 2947 if (netfirst) { 2948 /* 2949 * Lie and return ok, we don't want to make the association 2950 * go away for this behavior. It will happen in the TCP 2951 * model in a connected socket. It does not reach the hash 2952 * table until after the association is built so it can't be 2953 * found. Mark as reachable, since the initial creation will 2954 * have been cleared and the NOT_IN_ASSOC flag will have 2955 * been added... and we don't want to end up removing it 2956 * back out. 2957 */ 2958 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 2959 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 2960 SCTP_ADDR_UNCONFIRMED); 2961 } else { 2962 netfirst->dest_state = SCTP_ADDR_REACHABLE; 2963 } 2964 2965 return (0); 2966 } 2967 addr_inscope = 1; 2968 if (newaddr->sa_family == AF_INET) { 2969 struct sockaddr_in *sin; 2970 2971 sin = (struct sockaddr_in *)newaddr; 2972 if (sin->sin_addr.s_addr == 0) { 2973 /* Invalid address */ 2974 return (-1); 2975 } 2976 /* zero out the bzero area */ 2977 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 2978 2979 /* assure len is set */ 2980 sin->sin_len = sizeof(struct sockaddr_in); 2981 if (set_scope) { 2982#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 2983 stcb->ipv4_local_scope = 1; 2984#else 2985 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2986 stcb->asoc.ipv4_local_scope = 1; 2987 } 2988#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 2989 } else { 2990 /* Validate the address is in scope */ 2991 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 2992 (stcb->asoc.ipv4_local_scope == 0)) { 2993 addr_inscope = 0; 2994 } 2995 } 2996 } else if (newaddr->sa_family == AF_INET6) { 2997 struct sockaddr_in6 *sin6; 2998 2999 sin6 = (struct sockaddr_in6 *)newaddr; 3000 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3001 /* Invalid address */ 3002 return (-1); 3003 } 3004 /* assure len is set */ 3005 sin6->sin6_len = sizeof(struct sockaddr_in6); 3006 if (set_scope) { 3007 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3008 stcb->asoc.loopback_scope = 1; 3009 stcb->asoc.local_scope = 0; 3010 stcb->asoc.ipv4_local_scope = 1; 3011 stcb->asoc.site_scope = 1; 3012 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3013 /* 3014 * If the new destination is a LINK_LOCAL we 3015 * must have common site scope. Don't set 3016 * the local scope since we may not share 3017 * all links, only loopback can do this. 3018 * Links on the local network would also be 3019 * on our private network for v4 too. 3020 */ 3021 stcb->asoc.ipv4_local_scope = 1; 3022 stcb->asoc.site_scope = 1; 3023 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3024 /* 3025 * If the new destination is SITE_LOCAL then 3026 * we must have site scope in common. 3027 */ 3028 stcb->asoc.site_scope = 1; 3029 } 3030 } else { 3031 /* Validate the address is in scope */ 3032 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3033 (stcb->asoc.loopback_scope == 0)) { 3034 addr_inscope = 0; 3035 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3036 (stcb->asoc.local_scope == 0)) { 3037 addr_inscope = 0; 3038 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3039 (stcb->asoc.site_scope == 0)) { 3040 addr_inscope = 0; 3041 } 3042 } 3043 } else { 3044 /* not supported family type */ 3045 return (-1); 3046 } 3047 net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets); 3048 if (net == NULL) { 3049 return (-1); 3050 } 3051 SCTP_INCR_RADDR_COUNT(); 3052 bzero(net, sizeof(*net)); 3053 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3054 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3055 if (newaddr->sa_family == AF_INET) { 3056 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3057 } else if (newaddr->sa_family == AF_INET6) { 3058 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3059 } 3060 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3061 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3062 stcb->asoc.loopback_scope = 1; 3063 stcb->asoc.ipv4_local_scope = 1; 3064 stcb->asoc.local_scope = 0; 3065 stcb->asoc.site_scope = 1; 3066 addr_inscope = 1; 3067 } 3068 net->failure_threshold = stcb->asoc.def_net_failure; 3069 if (addr_inscope == 0) { 3070 net->dest_state = (SCTP_ADDR_REACHABLE | 3071 SCTP_ADDR_OUT_OF_SCOPE); 3072 } else { 3073 if (from == SCTP_ADDR_IS_CONFIRMED) 3074 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3075 net->dest_state = SCTP_ADDR_REACHABLE; 3076 else 3077 net->dest_state = SCTP_ADDR_REACHABLE | 3078 SCTP_ADDR_UNCONFIRMED; 3079 } 3080 net->RTO = stcb->asoc.initial_rto; 3081 stcb->asoc.numnets++; 3082 *(&net->ref_count) = 1; 3083 net->tos_flowlabel = 0; 3084#ifdef INET 3085 if (newaddr->sa_family == AF_INET) 3086 net->tos_flowlabel = stcb->asoc.default_tos; 3087#endif 3088#ifdef INET6 3089 if (newaddr->sa_family == AF_INET6) 3090 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3091#endif 3092 /* Init the timer structure */ 3093 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3094 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3095 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3096 3097 /* Now generate a route for this guy */ 3098 /* KAME hack: embed scopeid */ 3099 if (newaddr->sa_family == AF_INET6) { 3100 struct sockaddr_in6 *sin6; 3101 3102 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3103 (void)sa6_embedscope(sin6, ip6_use_defzone); 3104 sin6->sin6_scope_id = 0; 3105 } 3106 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3107 3108 if (newaddr->sa_family == AF_INET6) { 3109 struct sockaddr_in6 *sin6; 3110 3111 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3112 (void)sa6_recoverscope(sin6); 3113 } 3114 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3115 /* Get source address */ 3116 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3117 stcb, 3118 (sctp_route_t *) & net->ro, 3119 net, 3120 0, 3121 stcb->asoc.vrf_id); 3122 /* Now get the interface MTU */ 3123 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3124 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3125 } else { 3126 net->mtu = 0; 3127 } 3128#ifdef SCTP_PRINT_FOR_B_AND_M 3129 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu); 3130#endif 3131 if (net->mtu == 0) { 3132 /* Huh ?? */ 3133 net->mtu = SCTP_DEFAULT_MTU; 3134 } else { 3135 uint32_t rmtu; 3136 3137 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3138#ifdef SCTP_PRINT_FOR_B_AND_M 3139 SCTP_PRINTF("The route mtu is %d\n", rmtu); 3140#endif 3141 if (rmtu == 0) { 3142 /* 3143 * Start things off to match mtu of 3144 * interface please. 3145 */ 3146 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3147 net->ro.ro_rt, net->mtu); 3148 } else { 3149 /* 3150 * we take the route mtu over the interface, 3151 * since the route may be leading out the 3152 * loopback, or a different interface. 3153 */ 3154 net->mtu = rmtu; 3155 } 3156 } 3157 if (from == SCTP_ALLOC_ASOC) { 3158#ifdef SCTP_PRINT_FOR_B_AND_M 3159 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu); 3160#endif 3161 stcb->asoc.smallest_mtu = net->mtu; 3162 } 3163 } else { 3164 net->mtu = stcb->asoc.smallest_mtu; 3165 } 3166 if (stcb->asoc.smallest_mtu > net->mtu) { 3167#ifdef SCTP_PRINT_FOR_B_AND_M 3168 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n", 3169 net->mtu, stcb->asoc.smallest_mtu); 3170#endif 3171 stcb->asoc.smallest_mtu = net->mtu; 3172 } 3173 /* 3174 * We take the max of the burst limit times a MTU or the 3175 * INITIAL_CWND. We then limit this to 4 MTU's of sending. 3176 */ 3177 sctp_set_initial_cc_param(stcb, net); 3178 3179 3180#if defined(SCTP_CWND_MONITOR) || defined(SCTP_CWND_LOGGING) 3181 sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION); 3182#endif 3183 3184 /* 3185 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3186 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3187 */ 3188 net->find_pseudo_cumack = 1; 3189 net->find_rtx_pseudo_cumack = 1; 3190 net->src_addr_selected = 0; 3191 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3192 if (net->ro.ro_rt == NULL) { 3193 /* Since we have no route put it at the back */ 3194 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3195 } else if (netfirst == NULL) { 3196 /* We are the first one in the pool. */ 3197 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3198 } else if (netfirst->ro.ro_rt == NULL) { 3199 /* 3200 * First one has NO route. Place this one ahead of the first 3201 * one. 3202 */ 3203 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3204 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3205 /* 3206 * This one has a different interface than the one at the 3207 * top of the list. Place it ahead. 3208 */ 3209 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3210 } else { 3211 /* 3212 * Ok we have the same interface as the first one. Move 3213 * forward until we find either a) one with a NULL route... 3214 * insert ahead of that b) one with a different ifp.. insert 3215 * after that. c) end of the list.. insert at the tail. 3216 */ 3217 struct sctp_nets *netlook; 3218 3219 do { 3220 netlook = TAILQ_NEXT(netfirst, sctp_next); 3221 if (netlook == NULL) { 3222 /* End of the list */ 3223 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3224 break; 3225 } else if (netlook->ro.ro_rt == NULL) { 3226 /* next one has NO route */ 3227 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 3228 break; 3229 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 3230 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 3231 net, sctp_next); 3232 break; 3233 } 3234 /* Shift forward */ 3235 netfirst = netlook; 3236 } while (netlook != NULL); 3237 } 3238 3239 /* got to have a primary set */ 3240 if (stcb->asoc.primary_destination == 0) { 3241 stcb->asoc.primary_destination = net; 3242 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 3243 (net->ro.ro_rt) && 3244 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 3245 /* No route to current primary adopt new primary */ 3246 stcb->asoc.primary_destination = net; 3247 } 3248 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 3249 net); 3250 /* Validate primary is first */ 3251 net = TAILQ_FIRST(&stcb->asoc.nets); 3252 if ((net != stcb->asoc.primary_destination) && 3253 (stcb->asoc.primary_destination)) { 3254 /* 3255 * first one on the list is NOT the primary sctp_cmpaddr() 3256 * is much more efficent if the primary is the first on the 3257 * list, make it so. 3258 */ 3259 TAILQ_REMOVE(&stcb->asoc.nets, 3260 stcb->asoc.primary_destination, sctp_next); 3261 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 3262 stcb->asoc.primary_destination, sctp_next); 3263 } 3264 return (0); 3265} 3266 3267 3268/* 3269 * allocate an association and add it to the endpoint. The caller must be 3270 * careful to add all additional addresses once they are know right away or 3271 * else the assoc will be may experience a blackout scenario. 3272 */ 3273struct sctp_tcb * 3274sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 3275 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id) 3276{ 3277 struct sctp_tcb *stcb; 3278 struct sctp_association *asoc; 3279 struct sctpasochead *head; 3280 uint16_t rport; 3281 int err; 3282 3283 /* 3284 * Assumption made here: Caller has done a 3285 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 3286 * address does not exist already. 3287 */ 3288 if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) { 3289 /* Hit max assoc, sorry no more */ 3290 *error = ENOBUFS; 3291 return (NULL); 3292 } 3293 if (firstaddr == NULL) { 3294 *error = EINVAL; 3295 return (NULL); 3296 } 3297 SCTP_INP_RLOCK(inp); 3298 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 3299 /* 3300 * If its in the TCP pool, its NOT allowed to create an 3301 * association. The parent listener needs to call 3302 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 3303 * off, or connected one does this.. its an error. 3304 */ 3305 SCTP_INP_RUNLOCK(inp); 3306 *error = EINVAL; 3307 return (NULL); 3308 } 3309 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 3310#ifdef SCTP_DEBUG 3311 if (firstaddr) { 3312 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 3313 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 3314 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 3315 } else { 3316 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 3317 } 3318#endif /* SCTP_DEBUG */ 3319 if (firstaddr->sa_family == AF_INET) { 3320 struct sockaddr_in *sin; 3321 3322 sin = (struct sockaddr_in *)firstaddr; 3323 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 3324 /* Invalid address */ 3325 SCTP_INP_RUNLOCK(inp); 3326 *error = EINVAL; 3327 return (NULL); 3328 } 3329 rport = sin->sin_port; 3330 } else if (firstaddr->sa_family == AF_INET6) { 3331 struct sockaddr_in6 *sin6; 3332 3333 sin6 = (struct sockaddr_in6 *)firstaddr; 3334 if ((sin6->sin6_port == 0) || 3335 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 3336 /* Invalid address */ 3337 SCTP_INP_RUNLOCK(inp); 3338 *error = EINVAL; 3339 return (NULL); 3340 } 3341 rport = sin6->sin6_port; 3342 } else { 3343 /* not supported family type */ 3344 SCTP_INP_RUNLOCK(inp); 3345 *error = EINVAL; 3346 return (NULL); 3347 } 3348 SCTP_INP_RUNLOCK(inp); 3349 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 3350 /* 3351 * If you have not performed a bind, then we need to do the 3352 * ephemerial bind for you. 3353 */ 3354 if ((err = sctp_inpcb_bind(inp->sctp_socket, 3355 (struct sockaddr *)NULL, 3356 (struct thread *)NULL 3357 ))) { 3358 /* bind error, probably perm */ 3359 *error = err; 3360 return (NULL); 3361 } 3362 } 3363 stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb); 3364 if (stcb == NULL) { 3365 /* out of memory? */ 3366 *error = ENOMEM; 3367 return (NULL); 3368 } 3369 SCTP_INCR_ASOC_COUNT(); 3370 3371 bzero(stcb, sizeof(*stcb)); 3372 asoc = &stcb->asoc; 3373 SCTP_TCB_LOCK_INIT(stcb); 3374 SCTP_TCB_SEND_LOCK_INIT(stcb); 3375 /* setup back pointer's */ 3376 stcb->sctp_ep = inp; 3377 stcb->sctp_socket = inp->sctp_socket; 3378 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) { 3379 /* failed */ 3380 SCTP_TCB_LOCK_DESTROY(stcb); 3381 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3382 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3383 SCTP_DECR_ASOC_COUNT(); 3384 *error = err; 3385 return (NULL); 3386 } 3387 /* and the port */ 3388 stcb->rport = rport; 3389 SCTP_INP_INFO_WLOCK(); 3390 SCTP_INP_WLOCK(inp); 3391 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3392 /* inpcb freed while alloc going on */ 3393 SCTP_TCB_LOCK_DESTROY(stcb); 3394 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3395 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3396 SCTP_INP_WUNLOCK(inp); 3397 SCTP_INP_INFO_WUNLOCK(); 3398 SCTP_DECR_ASOC_COUNT(); 3399 *error = EINVAL; 3400 return (NULL); 3401 } 3402 SCTP_TCB_LOCK(stcb); 3403 3404 /* now that my_vtag is set, add it to the hash */ 3405 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, 3406 sctppcbinfo.hashasocmark)]; 3407 /* put it in the bucket in the vtag hash of assoc's for the system */ 3408 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 3409 SCTP_INP_INFO_WUNLOCK(); 3410 3411 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 3412 /* failure.. memory error? */ 3413 if (asoc->strmout) { 3414 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 3415 asoc->strmout = NULL; 3416 } 3417 if (asoc->mapping_array) { 3418 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 3419 asoc->mapping_array = NULL; 3420 } 3421 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3422 SCTP_DECR_ASOC_COUNT(); 3423 SCTP_TCB_LOCK_DESTROY(stcb); 3424 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3425 SCTP_INP_WUNLOCK(inp); 3426 *error = ENOBUFS; 3427 return (NULL); 3428 } 3429 /* Init all the timers */ 3430 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 3431 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 3432 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 3433 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 3434 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 3435 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 3436 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 3437 3438 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 3439 /* now file the port under the hash as well */ 3440 if (inp->sctp_tcbhash != NULL) { 3441 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 3442 inp->sctp_hashmark)]; 3443 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 3444 } 3445 SCTP_INP_WUNLOCK(inp); 3446 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 3447 return (stcb); 3448} 3449 3450 3451void 3452sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 3453{ 3454 struct sctp_association *asoc; 3455 3456 asoc = &stcb->asoc; 3457 asoc->numnets--; 3458 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 3459 if (net == asoc->primary_destination) { 3460 /* Reset primary */ 3461 struct sctp_nets *lnet; 3462 3463 lnet = TAILQ_FIRST(&asoc->nets); 3464 /* Try to find a confirmed primary */ 3465 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 3466 } 3467 if (net == asoc->last_data_chunk_from) { 3468 /* Reset primary */ 3469 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 3470 } 3471 if (net == asoc->last_control_chunk_from) { 3472 /* Clear net */ 3473 asoc->last_control_chunk_from = NULL; 3474 } 3475 sctp_free_remote_addr(net); 3476} 3477 3478/* 3479 * remove a remote endpoint address from an association, it will fail if the 3480 * address does not exist. 3481 */ 3482int 3483sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 3484{ 3485 /* 3486 * Here we need to remove a remote address. This is quite simple, we 3487 * first find it in the list of address for the association 3488 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 3489 * on that item. Note we do not allow it to be removed if there are 3490 * no other addresses. 3491 */ 3492 struct sctp_association *asoc; 3493 struct sctp_nets *net, *net_tmp; 3494 3495 asoc = &stcb->asoc; 3496 3497 /* locate the address */ 3498 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { 3499 net_tmp = TAILQ_NEXT(net, sctp_next); 3500 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 3501 continue; 3502 } 3503 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 3504 remaddr)) { 3505 /* we found the guy */ 3506 if (asoc->numnets < 2) { 3507 /* Must have at LEAST two remote addresses */ 3508 return (-1); 3509 } else { 3510 sctp_remove_net(stcb, net); 3511 return (0); 3512 } 3513 } 3514 } 3515 /* not found. */ 3516 return (-2); 3517} 3518 3519 3520void 3521sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time) 3522{ 3523 struct sctpvtaghead *chain; 3524 struct sctp_tagblock *twait_block; 3525 struct timeval now; 3526 int set, i; 3527 3528 (void)SCTP_GETTIME_TIMEVAL(&now); 3529 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 3530 set = 0; 3531 if (!SCTP_LIST_EMPTY(chain)) { 3532 /* Block(s) present, lets find space, and expire on the fly */ 3533 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 3534 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 3535 if ((twait_block->vtag_block[i].v_tag == 0) && 3536 !set) { 3537 twait_block->vtag_block[i].tv_sec_at_expire = 3538 now.tv_sec + time; 3539 twait_block->vtag_block[i].v_tag = tag; 3540 set = 1; 3541 } else if ((twait_block->vtag_block[i].v_tag) && 3542 ((long)twait_block->vtag_block[i].tv_sec_at_expire > 3543 now.tv_sec)) { 3544 /* Audit expires this guy */ 3545 twait_block->vtag_block[i].tv_sec_at_expire = 0; 3546 twait_block->vtag_block[i].v_tag = 0; 3547 if (set == 0) { 3548 /* Reuse it for my new tag */ 3549 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT; 3550 twait_block->vtag_block[0].v_tag = tag; 3551 set = 1; 3552 } 3553 } 3554 } 3555 if (set) { 3556 /* 3557 * We only do up to the block where we can 3558 * place our tag for audits 3559 */ 3560 break; 3561 } 3562 } 3563 } 3564 /* Need to add a new block to chain */ 3565 if (!set) { 3566 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 3567 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 3568 if (twait_block == NULL) { 3569 return; 3570 } 3571 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 3572 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 3573 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + 3574 SCTP_TIME_WAIT; 3575 twait_block->vtag_block[0].v_tag = tag; 3576 } 3577} 3578 3579 3580static void 3581sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 3582{ 3583 struct sctp_iterator *it; 3584 3585 /* 3586 * Unlock the tcb lock we do this so we avoid a dead lock scenario 3587 * where the iterator is waiting on the TCB lock and the TCB lock is 3588 * waiting on the iterator lock. 3589 */ 3590 it = stcb->asoc.stcb_starting_point_for_iterator; 3591 if (it == NULL) { 3592 return; 3593 } 3594 if (it->inp != stcb->sctp_ep) { 3595 /* hmm, focused on the wrong one? */ 3596 return; 3597 } 3598 if (it->stcb != stcb) { 3599 return; 3600 } 3601 it->stcb = LIST_NEXT(stcb, sctp_tcblist); 3602 if (it->stcb == NULL) { 3603 /* done with all asoc's in this assoc */ 3604 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3605 it->inp = NULL; 3606 } else { 3607 it->inp = LIST_NEXT(inp, sctp_list); 3608 } 3609 } 3610} 3611 3612 3613/* 3614 * Free the association after un-hashing the remote port. 3615 */ 3616int 3617sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 3618{ 3619 int i; 3620 struct sctp_association *asoc; 3621 struct sctp_nets *net, *prev; 3622 struct sctp_laddr *laddr; 3623 struct sctp_tmit_chunk *chk; 3624 struct sctp_asconf_addr *aparam; 3625 struct sctp_stream_reset_list *liste; 3626 struct sctp_queued_to_read *sq; 3627 struct sctp_stream_queue_pending *sp; 3628 sctp_sharedkey_t *shared_key; 3629 struct socket *so; 3630 int ccnt = 0; 3631 int cnt = 0; 3632 3633 /* first, lets purge the entry from the hash table. */ 3634 3635#ifdef SCTP_LOG_CLOSING 3636 sctp_log_closing(inp, stcb, 6); 3637#endif 3638 if (stcb->asoc.state == 0) { 3639#ifdef SCTP_LOG_CLOSING 3640 sctp_log_closing(inp, NULL, 7); 3641#endif 3642 /* there is no asoc, really TSNH :-0 */ 3643 return (1); 3644 } 3645 /* TEMP CODE */ 3646 if (stcb->freed_from_where == 0) { 3647 /* Only record the first place free happened from */ 3648 stcb->freed_from_where = from_location; 3649 } 3650 /* TEMP CODE */ 3651 3652 asoc = &stcb->asoc; 3653 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3654 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3655 /* nothing around */ 3656 so = NULL; 3657 else 3658 so = inp->sctp_socket; 3659 3660 /* 3661 * We used timer based freeing if a reader or writer is in the way. 3662 * So we first check if we are actually being called from a timer, 3663 * if so we abort early if a reader or writer is still in the way. 3664 */ 3665 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 3666 (from_inpcbfree == SCTP_NORMAL_PROC)) { 3667 /* 3668 * is it the timer driving us? if so are the reader/writers 3669 * gone? 3670 */ 3671 if (stcb->asoc.refcnt) { 3672 /* nope, reader or writer in the way */ 3673 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3674 /* no asoc destroyed */ 3675 SCTP_TCB_UNLOCK(stcb); 3676#ifdef SCTP_LOG_CLOSING 3677 sctp_log_closing(inp, stcb, 8); 3678#endif 3679 return (0); 3680 } 3681 } 3682 /* now clean up any other timers */ 3683 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 3684 asoc->hb_timer.self = NULL; 3685 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 3686 asoc->dack_timer.self = NULL; 3687 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3688 /*- 3689 * For stream reset we don't blast this unless 3690 * it is a str-reset timer, it might be the 3691 * free-asoc timer which we DON'T want to 3692 * disturb. 3693 */ 3694 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 3695 asoc->strreset_timer.self = NULL; 3696 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 3697 asoc->asconf_timer.self = NULL; 3698 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 3699 asoc->autoclose_timer.self = NULL; 3700 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 3701 asoc->shut_guard_timer.self = NULL; 3702 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 3703 asoc->delayed_event_timer.self = NULL; 3704 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 3705 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 3706 net->fr_timer.self = NULL; 3707 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 3708 net->rxt_timer.self = NULL; 3709 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 3710 net->pmtu_timer.self = NULL; 3711 } 3712 /* Now the read queue needs to be cleaned up (only once) */ 3713 cnt = 0; 3714 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 3715 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 3716 SCTP_INP_READ_LOCK(inp); 3717 TAILQ_FOREACH(sq, &inp->read_queue, next) { 3718 if (sq->stcb == stcb) { 3719 sq->do_not_ref_stcb = 1; 3720 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 3721 /* 3722 * If there is no end, there never will be 3723 * now. 3724 */ 3725 if (sq->end_added == 0) { 3726 /* Held for PD-API clear that. */ 3727 sq->pdapi_aborted = 1; 3728 sq->held_length = 0; 3729 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) { 3730 /* 3731 * Need to add a PD-API 3732 * aborted indication. 3733 * Setting the control_pdapi 3734 * assures that it will be 3735 * added right after this 3736 * msg. 3737 */ 3738 uint32_t strseq; 3739 3740 stcb->asoc.control_pdapi = sq; 3741 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 3742 sctp_notify_partial_delivery_indication(stcb, 3743 SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq); 3744 stcb->asoc.control_pdapi = NULL; 3745 } 3746 } 3747 /* Add an end to wake them */ 3748 sq->end_added = 1; 3749 cnt++; 3750 } 3751 } 3752 SCTP_INP_READ_UNLOCK(inp); 3753 if (stcb->block_entry) { 3754 cnt++; 3755 stcb->block_entry->error = ECONNRESET; 3756 stcb->block_entry = NULL; 3757 } 3758 } 3759 if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) { 3760 /* 3761 * reader or writer in the way, we have hopefully given him 3762 * something to chew on above. 3763 */ 3764 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3765 SCTP_TCB_UNLOCK(stcb); 3766 if (so) { 3767 SCTP_INP_RLOCK(inp); 3768 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3769 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3770 /* nothing around */ 3771 so = NULL; 3772 if (so) { 3773 /* Wake any reader/writers */ 3774 sctp_sorwakeup(inp, so); 3775 sctp_sowwakeup(inp, so); 3776 } 3777 SCTP_INP_RUNLOCK(inp); 3778 3779 } 3780#ifdef SCTP_LOG_CLOSING 3781 sctp_log_closing(inp, stcb, 9); 3782#endif 3783 /* no asoc destroyed */ 3784 return (0); 3785 } 3786#ifdef SCTP_LOG_CLOSING 3787 sctp_log_closing(inp, stcb, 10); 3788#endif 3789 /* 3790 * When I reach here, no others want to kill the assoc yet.. and I 3791 * own the lock. Now its possible an abort comes in when I do the 3792 * lock exchange below to grab all the locks to do the final take 3793 * out. to prevent this we increment the count, which will start a 3794 * timer and blow out above thus assuring us that we hold exclusive 3795 * killing of the asoc. Note that after getting back the TCB lock we 3796 * will go ahead and increment the counter back up and stop any 3797 * timer a passing stranger may have started :-S 3798 */ 3799 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3800 atomic_add_int(&stcb->asoc.refcnt, 1); 3801 3802 SCTP_TCB_UNLOCK(stcb); 3803 3804 SCTP_ITERATOR_LOCK(); 3805 SCTP_INP_INFO_WLOCK(); 3806 SCTP_INP_WLOCK(inp); 3807 SCTP_TCB_LOCK(stcb); 3808 } 3809 /* Double check the GONE flag */ 3810 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3811 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3812 /* nothing around */ 3813 so = NULL; 3814 3815 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 3816 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 3817 /* 3818 * For TCP type we need special handling when we are 3819 * connected. We also include the peel'ed off ones to. 3820 */ 3821 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 3822 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 3823 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 3824 if (so) { 3825 SOCK_LOCK(so); 3826 if (so->so_rcv.sb_cc == 0) { 3827 so->so_state &= ~(SS_ISCONNECTING | 3828 SS_ISDISCONNECTING | 3829 SS_ISCONFIRMING | 3830 SS_ISCONNECTED); 3831 } 3832 SOCK_UNLOCK(so); 3833 sctp_sowwakeup(inp, so); 3834 sctp_sorwakeup(inp, so); 3835 SCTP_SOWAKEUP(so); 3836 } 3837 } 3838 } 3839 /* 3840 * Make it invalid too, that way if its about to run it will abort 3841 * and return. 3842 */ 3843 sctp_iterator_asoc_being_freed(inp, stcb); 3844 /* re-increment the lock */ 3845 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3846 atomic_add_int(&stcb->asoc.refcnt, -1); 3847 } 3848 asoc->state = 0; 3849 if (inp->sctp_tcbhash) { 3850 LIST_REMOVE(stcb, sctp_tcbhash); 3851 } 3852 if (stcb->asoc.in_restart_hash) { 3853 LIST_REMOVE(stcb, sctp_tcbrestarhash); 3854 } 3855 /* Now lets remove it from the list of ALL associations in the EP */ 3856 LIST_REMOVE(stcb, sctp_tcblist); 3857 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3858 SCTP_INP_INCR_REF(inp); 3859 SCTP_INP_WUNLOCK(inp); 3860 SCTP_ITERATOR_UNLOCK(); 3861 } 3862 /* pull from vtag hash */ 3863 LIST_REMOVE(stcb, sctp_asocs); 3864 sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT); 3865 3866 3867 /* 3868 * Now restop the timers to be sure - this is paranoia at is finest! 3869 */ 3870 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3871 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 3872 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 3873 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3874 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 3875 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 3876 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 3877 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 3878 3879 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 3880 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 3881 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 3882 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 3883 } 3884 3885 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 3886 prev = NULL; 3887 /* 3888 * The chunk lists and such SHOULD be empty but we check them just 3889 * in case. 3890 */ 3891 /* anything on the wheel needs to be removed */ 3892 for (i = 0; i < asoc->streamoutcnt; i++) { 3893 struct sctp_stream_out *outs; 3894 3895 outs = &asoc->strmout[i]; 3896 /* now clean up any chunks here */ 3897 sp = TAILQ_FIRST(&outs->outqueue); 3898 while (sp) { 3899 TAILQ_REMOVE(&outs->outqueue, sp, next); 3900 if (sp->data) { 3901 sctp_m_freem(sp->data); 3902 sp->data = NULL; 3903 sp->tail_mbuf = NULL; 3904 } 3905 sctp_free_remote_addr(sp->net); 3906 sctp_free_spbufspace(stcb, asoc, sp); 3907 /* Free the zone stuff */ 3908 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp); 3909 SCTP_DECR_STRMOQ_COUNT(); 3910 /* sa_ignore FREED_MEMORY */ 3911 sp = TAILQ_FIRST(&outs->outqueue); 3912 } 3913 } 3914 3915 /* sa_ignore FREED_MEMORY */ 3916 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { 3917 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); 3918 SCTP_FREE(liste, SCTP_M_STRESET); 3919 } 3920 3921 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 3922 while (sq) { 3923 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 3924 if (sq->data) { 3925 sctp_m_freem(sq->data); 3926 sq->data = NULL; 3927 } 3928 sctp_free_remote_addr(sq->whoFrom); 3929 sq->whoFrom = NULL; 3930 sq->stcb = NULL; 3931 /* Free the ctl entry */ 3932 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); 3933 SCTP_DECR_READQ_COUNT(); 3934 /* sa_ignore FREED_MEMORY */ 3935 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 3936 } 3937 3938 chk = TAILQ_FIRST(&asoc->free_chunks); 3939 while (chk) { 3940 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 3941 if (chk->data) { 3942 sctp_m_freem(chk->data); 3943 chk->data = NULL; 3944 } 3945 ccnt++; 3946 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 3947 SCTP_DECR_CHK_COUNT(); 3948 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1); 3949 asoc->free_chunk_cnt--; 3950 /* sa_ignore FREED_MEMORY */ 3951 chk = TAILQ_FIRST(&asoc->free_chunks); 3952 } 3953 /* pending send queue SHOULD be empty */ 3954 if (!TAILQ_EMPTY(&asoc->send_queue)) { 3955 chk = TAILQ_FIRST(&asoc->send_queue); 3956 while (chk) { 3957 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 3958 if (chk->data) { 3959 sctp_m_freem(chk->data); 3960 chk->data = NULL; 3961 } 3962 ccnt++; 3963 sctp_free_remote_addr(chk->whoTo); 3964 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 3965 SCTP_DECR_CHK_COUNT(); 3966 /* sa_ignore FREED_MEMORY */ 3967 chk = TAILQ_FIRST(&asoc->send_queue); 3968 } 3969 } 3970/* 3971 if(ccnt) { 3972 printf("Freed %d from send_queue\n", ccnt); 3973 ccnt = 0; 3974 } 3975*/ 3976 /* sent queue SHOULD be empty */ 3977 if (!TAILQ_EMPTY(&asoc->sent_queue)) { 3978 chk = TAILQ_FIRST(&asoc->sent_queue); 3979 while (chk) { 3980 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 3981 if (chk->data) { 3982 sctp_m_freem(chk->data); 3983 chk->data = NULL; 3984 } 3985 ccnt++; 3986 sctp_free_remote_addr(chk->whoTo); 3987 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 3988 SCTP_DECR_CHK_COUNT(); 3989 /* sa_ignore FREED_MEMORY */ 3990 chk = TAILQ_FIRST(&asoc->sent_queue); 3991 } 3992 } 3993/* 3994 if(ccnt) { 3995 printf("Freed %d from sent_queue\n", ccnt); 3996 ccnt = 0; 3997 } 3998*/ 3999 /* control queue MAY not be empty */ 4000 if (!TAILQ_EMPTY(&asoc->control_send_queue)) { 4001 chk = TAILQ_FIRST(&asoc->control_send_queue); 4002 while (chk) { 4003 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4004 if (chk->data) { 4005 sctp_m_freem(chk->data); 4006 chk->data = NULL; 4007 } 4008 ccnt++; 4009 sctp_free_remote_addr(chk->whoTo); 4010 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4011 SCTP_DECR_CHK_COUNT(); 4012 /* sa_ignore FREED_MEMORY */ 4013 chk = TAILQ_FIRST(&asoc->control_send_queue); 4014 } 4015 } 4016/* 4017 if(ccnt) { 4018 printf("Freed %d from ctrl_queue\n", ccnt); 4019 ccnt = 0; 4020 } 4021*/ 4022 if (!TAILQ_EMPTY(&asoc->reasmqueue)) { 4023 chk = TAILQ_FIRST(&asoc->reasmqueue); 4024 while (chk) { 4025 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4026 if (chk->data) { 4027 sctp_m_freem(chk->data); 4028 chk->data = NULL; 4029 } 4030 sctp_free_remote_addr(chk->whoTo); 4031 ccnt++; 4032 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4033 SCTP_DECR_CHK_COUNT(); 4034 /* sa_ignore FREED_MEMORY */ 4035 chk = TAILQ_FIRST(&asoc->reasmqueue); 4036 } 4037 } 4038/* 4039 if(ccnt) { 4040 printf("Freed %d from reasm_queue\n", ccnt); 4041 ccnt = 0; 4042 } 4043*/ 4044 if (asoc->mapping_array) { 4045 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4046 asoc->mapping_array = NULL; 4047 } 4048 /* the stream outs */ 4049 if (asoc->strmout) { 4050 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4051 asoc->strmout = NULL; 4052 } 4053 asoc->streamoutcnt = 0; 4054 if (asoc->strmin) { 4055 struct sctp_queued_to_read *ctl; 4056 4057 for (i = 0; i < asoc->streamincnt; i++) { 4058 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { 4059 /* We have somethings on the streamin queue */ 4060 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4061 while (ctl) { 4062 TAILQ_REMOVE(&asoc->strmin[i].inqueue, 4063 ctl, next); 4064 sctp_free_remote_addr(ctl->whoFrom); 4065 if (ctl->data) { 4066 sctp_m_freem(ctl->data); 4067 ctl->data = NULL; 4068 } 4069 /* 4070 * We don't free the address here 4071 * since all the net's were freed 4072 * above. 4073 */ 4074 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); 4075 SCTP_DECR_READQ_COUNT(); 4076 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4077 } 4078 } 4079 } 4080 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4081 asoc->strmin = NULL; 4082 } 4083 asoc->streamincnt = 0; 4084 while (!TAILQ_EMPTY(&asoc->nets)) { 4085 /* sa_ignore FREED_MEMORY */ 4086 net = TAILQ_FIRST(&asoc->nets); 4087 /* pull from list */ 4088 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) { 4089#ifdef INVARIANTS 4090 panic("no net's left alloc'ed, or list points to itself"); 4091#endif 4092 break; 4093 } 4094 prev = net; 4095 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4096 sctp_free_remote_addr(net); 4097 } 4098 4099 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) { 4100 /* sa_ignore FREED_MEMORY */ 4101 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); 4102 sctp_remove_laddr(laddr); 4103 } 4104 4105 /* pending asconf (address) parameters */ 4106 while (!TAILQ_EMPTY(&asoc->asconf_queue)) { 4107 /* sa_ignore FREED_MEMORY */ 4108 aparam = TAILQ_FIRST(&asoc->asconf_queue); 4109 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 4110 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 4111 } 4112 if (asoc->last_asconf_ack_sent != NULL) { 4113 sctp_m_freem(asoc->last_asconf_ack_sent); 4114 asoc->last_asconf_ack_sent = NULL; 4115 } 4116 /* clean up auth stuff */ 4117 if (asoc->local_hmacs) 4118 sctp_free_hmaclist(asoc->local_hmacs); 4119 if (asoc->peer_hmacs) 4120 sctp_free_hmaclist(asoc->peer_hmacs); 4121 4122 if (asoc->local_auth_chunks) 4123 sctp_free_chunklist(asoc->local_auth_chunks); 4124 if (asoc->peer_auth_chunks) 4125 sctp_free_chunklist(asoc->peer_auth_chunks); 4126 4127 sctp_free_authinfo(&asoc->authinfo); 4128 4129 shared_key = LIST_FIRST(&asoc->shared_keys); 4130 while (shared_key) { 4131 LIST_REMOVE(shared_key, next); 4132 sctp_free_sharedkey(shared_key); 4133 /* sa_ignore FREED_MEMORY */ 4134 shared_key = LIST_FIRST(&asoc->shared_keys); 4135 } 4136 4137 /* Insert new items here :> */ 4138 4139 /* Get rid of LOCK */ 4140 SCTP_TCB_LOCK_DESTROY(stcb); 4141 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4142 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4143 SCTP_INP_INFO_WUNLOCK(); 4144 SCTP_INP_RLOCK(inp); 4145 } 4146#ifdef SCTP_TRACK_FREED_ASOCS 4147 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4148 /* now clean up the tasoc itself */ 4149 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 4150 SCTP_DECR_ASOC_COUNT(); 4151 } else { 4152 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 4153 } 4154#else 4155 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 4156 SCTP_DECR_ASOC_COUNT(); 4157#endif 4158 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4159 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4160 /* 4161 * If its NOT the inp_free calling us AND sctp_close 4162 * as been called, we call back... 4163 */ 4164 SCTP_INP_RUNLOCK(inp); 4165 /* 4166 * This will start the kill timer (if we are the 4167 * lastone) since we hold an increment yet. But this 4168 * is the only safe way to do this since otherwise 4169 * if the socket closes at the same time we are here 4170 * we might collide in the cleanup. 4171 */ 4172 sctp_inpcb_free(inp, 4173 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 4174 SCTP_CALLED_DIRECTLY_NOCMPSET); 4175 SCTP_INP_DECR_REF(inp); 4176 goto out_of; 4177 } else { 4178 /* The socket is still open. */ 4179 SCTP_INP_DECR_REF(inp); 4180 } 4181 } 4182 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4183 SCTP_INP_RUNLOCK(inp); 4184 } 4185out_of: 4186 /* destroyed the asoc */ 4187#ifdef SCTP_LOG_CLOSING 4188 sctp_log_closing(inp, NULL, 11); 4189#endif 4190 return (1); 4191} 4192 4193 4194 4195/* 4196 * determine if a destination is "reachable" based upon the addresses bound 4197 * to the current endpoint (e.g. only v4 or v6 currently bound) 4198 */ 4199/* 4200 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 4201 * assoc level v4/v6 flags, as the assoc *may* not have the same address 4202 * types bound as its endpoint 4203 */ 4204int 4205sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 4206{ 4207 struct sctp_inpcb *inp; 4208 int answer; 4209 4210 /* 4211 * No locks here, the TCB, in all cases is already locked and an 4212 * assoc is up. There is either a INP lock by the caller applied (in 4213 * asconf case when deleting an address) or NOT in the HB case, 4214 * however if HB then the INP increment is up and the INP will not 4215 * be removed (on top of the fact that we have a TCB lock). So we 4216 * only want to read the sctp_flags, which is either bound-all or 4217 * not.. no protection needed since once an assoc is up you can't be 4218 * changing your binding. 4219 */ 4220 inp = stcb->sctp_ep; 4221 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4222 /* if bound all, destination is not restricted */ 4223 /* 4224 * RRS: Question during lock work: Is this correct? If you 4225 * are bound-all you still might need to obey the V4--V6 4226 * flags??? IMO this bound-all stuff needs to be removed! 4227 */ 4228 return (1); 4229 } 4230 /* NOTE: all "scope" checks are done when local addresses are added */ 4231 if (destaddr->sa_family == AF_INET6) { 4232 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 4233 } else if (destaddr->sa_family == AF_INET) { 4234 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 4235 } else { 4236 /* invalid family, so it's unreachable */ 4237 answer = 0; 4238 } 4239 return (answer); 4240} 4241 4242/* 4243 * update the inp_vflags on an endpoint 4244 */ 4245static void 4246sctp_update_ep_vflag(struct sctp_inpcb *inp) 4247{ 4248 struct sctp_laddr *laddr; 4249 4250 /* first clear the flag */ 4251 inp->ip_inp.inp.inp_vflag = 0; 4252 /* set the flag based on addresses on the ep list */ 4253 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4254 if (laddr->ifa == NULL) { 4255 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 4256 __FUNCTION__); 4257 continue; 4258 } 4259 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 4260 continue; 4261 } 4262 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 4263 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4264 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 4265 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4266 } 4267 } 4268} 4269 4270/* 4271 * Add the address to the endpoint local address list There is nothing to be 4272 * done if we are bound to all addresses 4273 */ 4274void 4275sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 4276{ 4277 struct sctp_laddr *laddr; 4278 int fnd, error = 0; 4279 4280 fnd = 0; 4281 4282 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4283 /* You are already bound to all. You have it already */ 4284 return; 4285 } 4286 if (ifa->address.sa.sa_family == AF_INET6) { 4287 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 4288 /* Can't bind a non-useable addr. */ 4289 return; 4290 } 4291 } 4292 /* first, is it already present? */ 4293 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4294 if (laddr->ifa == ifa) { 4295 fnd = 1; 4296 break; 4297 } 4298 } 4299 4300 if (fnd == 0) { 4301 /* Not in the ep list */ 4302 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 4303 if (error != 0) 4304 return; 4305 inp->laddr_count++; 4306 /* update inp_vflag flags */ 4307 if (ifa->address.sa.sa_family == AF_INET6) { 4308 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4309 } else if (ifa->address.sa.sa_family == AF_INET) { 4310 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4311 } 4312 } 4313 return; 4314} 4315 4316 4317/* 4318 * select a new (hopefully reachable) destination net (should only be used 4319 * when we deleted an ep addr that is the only usable source address to reach 4320 * the destination net) 4321 */ 4322static void 4323sctp_select_primary_destination(struct sctp_tcb *stcb) 4324{ 4325 struct sctp_nets *net; 4326 4327 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4328 /* for now, we'll just pick the first reachable one we find */ 4329 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 4330 continue; 4331 if (sctp_destination_is_reachable(stcb, 4332 (struct sockaddr *)&net->ro._l_addr)) { 4333 /* found a reachable destination */ 4334 stcb->asoc.primary_destination = net; 4335 } 4336 } 4337 /* I can't there from here! ...we're gonna die shortly... */ 4338} 4339 4340 4341/* 4342 * Delete the address from the endpoint local address list There is nothing 4343 * to be done if we are bound to all addresses 4344 */ 4345void 4346sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 4347{ 4348 struct sctp_laddr *laddr; 4349 int fnd; 4350 4351 fnd = 0; 4352 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4353 /* You are already bound to all. You have it already */ 4354 return; 4355 } 4356 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4357 if (laddr->ifa == ifa) { 4358 fnd = 1; 4359 break; 4360 } 4361 } 4362 if (fnd && (inp->laddr_count < 2)) { 4363 /* can't delete unless there are at LEAST 2 addresses */ 4364 return; 4365 } 4366 if (fnd) { 4367 /* 4368 * clean up any use of this address go through our 4369 * associations and clear any last_used_address that match 4370 * this one for each assoc, see if a new primary_destination 4371 * is needed 4372 */ 4373 struct sctp_tcb *stcb; 4374 4375 /* clean up "next_addr_touse" */ 4376 if (inp->next_addr_touse == laddr) 4377 /* delete this address */ 4378 inp->next_addr_touse = NULL; 4379 4380 /* clean up "last_used_address" */ 4381 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 4382 struct sctp_nets *net; 4383 4384 SCTP_TCB_LOCK(stcb); 4385 if (stcb->asoc.last_used_address == laddr) 4386 /* delete this address */ 4387 stcb->asoc.last_used_address = NULL; 4388 /* 4389 * Now spin through all the nets and purge any ref 4390 * to laddr 4391 */ 4392 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4393 if (net->ro._s_addr && 4394 (net->ro._s_addr->ifa == laddr->ifa)) { 4395 /* Yep, purge src address selected */ 4396 sctp_rtentry_t *rt; 4397 4398 /* delete this address if cached */ 4399 rt = net->ro.ro_rt; 4400 if (rt != NULL) { 4401 RTFREE(rt); 4402 net->ro.ro_rt = NULL; 4403 } 4404 sctp_free_ifa(net->ro._s_addr); 4405 net->ro._s_addr = NULL; 4406 net->src_addr_selected = 0; 4407 } 4408 } 4409 SCTP_TCB_UNLOCK(stcb); 4410 } /* for each tcb */ 4411 /* remove it from the ep list */ 4412 sctp_remove_laddr(laddr); 4413 inp->laddr_count--; 4414 /* update inp_vflag flags */ 4415 sctp_update_ep_vflag(inp); 4416 } 4417 return; 4418} 4419 4420/* 4421 * Add the addr to the TCB local address list For the BOUNDALL or dynamic 4422 * case, this is a "pending" address list (eg. addresses waiting for an 4423 * ASCONF-ACK response) For the subset binding, static case, this is a 4424 * "valid" address list 4425 */ 4426void 4427sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa, int restricted_list) 4428{ 4429 struct sctp_inpcb *inp; 4430 struct sctp_laddr *laddr; 4431 struct sctpladdr *list; 4432 4433 /* 4434 * Assumes TCB is locked.. and possibly the INP. May need to 4435 * confirm/fix that if we need it and is not the case. 4436 */ 4437 list = &stcb->asoc.sctp_restricted_addrs; 4438 4439 inp = stcb->sctp_ep; 4440 if (ifa->address.sa.sa_family == AF_INET6) { 4441 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 4442 /* Can't bind a non-existent addr. */ 4443 return; 4444 } 4445 } 4446 /* does the address already exist? */ 4447 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 4448 if (laddr->ifa == ifa) { 4449 return; 4450 } 4451 } 4452 4453 /* add to the list */ 4454 (void)sctp_insert_laddr(list, ifa, 0); 4455 return; 4456} 4457 4458/* 4459 * insert an laddr entry with the given ifa for the desired list 4460 */ 4461int 4462sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 4463{ 4464 struct sctp_laddr *laddr; 4465 4466 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 4467 if (laddr == NULL) { 4468 /* out of memory? */ 4469 return (EINVAL); 4470 } 4471 SCTP_INCR_LADDR_COUNT(); 4472 bzero(laddr, sizeof(*laddr)); 4473 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 4474 laddr->ifa = ifa; 4475 laddr->action = act; 4476 atomic_add_int(&ifa->refcount, 1); 4477 /* insert it */ 4478 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 4479 4480 return (0); 4481} 4482 4483/* 4484 * Remove an laddr entry from the local address list (on an assoc) 4485 */ 4486void 4487sctp_remove_laddr(struct sctp_laddr *laddr) 4488{ 4489 4490 /* remove from the list */ 4491 LIST_REMOVE(laddr, sctp_nxt_addr); 4492 sctp_free_ifa(laddr->ifa); 4493 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr); 4494 SCTP_DECR_LADDR_COUNT(); 4495} 4496 4497/* 4498 * Remove an address from the TCB local address list 4499 */ 4500void 4501sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 4502{ 4503 struct sctp_inpcb *inp; 4504 struct sctp_laddr *laddr; 4505 4506 /* 4507 * This is called by asconf work. It is assumed that a) The TCB is 4508 * locked and b) The INP is locked. This is true in as much as I can 4509 * trace through the entry asconf code where I did these locks. 4510 * Again, the ASCONF code is a bit different in that it does lock 4511 * the INP during its work often times. This must be since we don't 4512 * want other proc's looking up things while what they are looking 4513 * up is changing :-D 4514 */ 4515 4516 inp = stcb->sctp_ep; 4517 /* if subset bound and don't allow ASCONF's, can't delete last */ 4518 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 4519 (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF) == 0)) { 4520 if (stcb->asoc.numnets < 2) { 4521 /* can't delete last address */ 4522 return; 4523 } 4524 } 4525 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 4526 /* remove the address if it exists */ 4527 if (laddr->ifa == NULL) 4528 continue; 4529 if (laddr->ifa == ifa) { 4530 sctp_remove_laddr(laddr); 4531 return; 4532 } 4533 } 4534 4535 /* address not found! */ 4536 return; 4537} 4538 4539static char sctp_pcb_initialized = 0; 4540 4541/* 4542 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 4543 */ 4544/* sysctl */ 4545static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 4546static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 4547 4548void 4549sctp_pcb_init() 4550{ 4551 /* 4552 * SCTP initialization for the PCB structures should be called by 4553 * the sctp_init() funciton. 4554 */ 4555 int i; 4556 4557 if (sctp_pcb_initialized != 0) { 4558 /* error I was called twice */ 4559 return; 4560 } 4561 sctp_pcb_initialized = 1; 4562 4563 bzero(&sctpstat, sizeof(struct sctpstat)); 4564 (void)SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime); 4565 /* init the empty list of (All) Endpoints */ 4566 LIST_INIT(&sctppcbinfo.listhead); 4567 4568 /* init the iterator head */ 4569 TAILQ_INIT(&sctppcbinfo.iteratorhead); 4570 4571 /* init the hash table of endpoints */ 4572 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize); 4573 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize); 4574 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale); 4575 sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31), 4576 &sctppcbinfo.hashasocmark); 4577 sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize, 4578 &sctppcbinfo.hashmark); 4579 sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize, 4580 &sctppcbinfo.hashtcpmark); 4581 sctppcbinfo.hashtblsize = sctp_hashtblsize; 4582 4583 /* init the small hash table we use to track restarted asoc's */ 4584 sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, 4585 &sctppcbinfo.hashrestartmark); 4586 4587 4588 sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 4589 &sctppcbinfo.hashvrfmark); 4590 4591 /* init the zones */ 4592 /* 4593 * FIX ME: Should check for NULL returns, but if it does fail we are 4594 * doomed to panic anyways... add later maybe. 4595 */ 4596 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep", 4597 sizeof(struct sctp_inpcb), maxsockets); 4598 4599 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc", 4600 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 4601 4602 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr", 4603 sizeof(struct sctp_laddr), 4604 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 4605 4606 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr", 4607 sizeof(struct sctp_nets), 4608 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 4609 4610 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk", 4611 sizeof(struct sctp_tmit_chunk), 4612 (sctp_max_number_of_assoc * sctp_chunkscale)); 4613 4614 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq", 4615 sizeof(struct sctp_queued_to_read), 4616 (sctp_max_number_of_assoc * sctp_chunkscale)); 4617 4618 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out", 4619 sizeof(struct sctp_stream_queue_pending), 4620 (sctp_max_number_of_assoc * sctp_chunkscale)); 4621 4622 /* Master Lock INIT for info structure */ 4623 SCTP_INP_INFO_LOCK_INIT(); 4624 SCTP_STATLOG_INIT_LOCK(); 4625 SCTP_ITERATOR_LOCK_INIT(); 4626 4627 SCTP_IPI_COUNT_INIT(); 4628 SCTP_IPI_ADDR_INIT(); 4629 SCTP_IPI_ITERATOR_WQ_INIT(); 4630#ifdef SCTP_PACKET_LOGGING 4631 SCTP_IP_PKTLOG_INIT(); 4632#endif 4633 LIST_INIT(&sctppcbinfo.addr_wq); 4634 4635 /* not sure if we need all the counts */ 4636 sctppcbinfo.ipi_count_ep = 0; 4637 /* assoc/tcb zone info */ 4638 sctppcbinfo.ipi_count_asoc = 0; 4639 /* local addrlist zone info */ 4640 sctppcbinfo.ipi_count_laddr = 0; 4641 /* remote addrlist zone info */ 4642 sctppcbinfo.ipi_count_raddr = 0; 4643 /* chunk info */ 4644 sctppcbinfo.ipi_count_chunk = 0; 4645 4646 /* socket queue zone info */ 4647 sctppcbinfo.ipi_count_readq = 0; 4648 4649 /* stream out queue cont */ 4650 sctppcbinfo.ipi_count_strmoq = 0; 4651 4652 sctppcbinfo.ipi_free_strmoq = 0; 4653 sctppcbinfo.ipi_free_chunks = 0; 4654 4655 SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer); 4656 4657 /* Init the TIMEWAIT list */ 4658 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) { 4659 LIST_INIT(&sctppcbinfo.vtag_timewait[i]); 4660 } 4661 4662#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 4663 sctppcbinfo.iterator_running = 0; 4664 sctp_startup_iterator(); 4665#endif 4666 4667 /* 4668 * INIT the default VRF which for BSD is the only one, other O/S's 4669 * may have more. But initially they must start with one and then 4670 * add the VRF's as addresses are added. 4671 */ 4672 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 4673 4674} 4675 4676 4677int 4678sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 4679 int iphlen, int offset, int limit, struct sctphdr *sh, 4680 struct sockaddr *altsa) 4681{ 4682 /* 4683 * grub through the INIT pulling addresses and loading them to the 4684 * nets structure in the asoc. The from address in the mbuf should 4685 * also be loaded (if it is not already). This routine can be called 4686 * with either INIT or INIT-ACK's as long as the m points to the IP 4687 * packet and the offset points to the beginning of the parameters. 4688 */ 4689 struct sctp_inpcb *inp, *l_inp; 4690 struct sctp_nets *net, *net_tmp; 4691 struct ip *iph; 4692 struct sctp_paramhdr *phdr, parm_buf; 4693 struct sctp_tcb *stcb_tmp; 4694 uint16_t ptype, plen; 4695 struct sockaddr *sa; 4696 struct sockaddr_storage dest_store; 4697 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 4698 struct sockaddr_in sin; 4699 struct sockaddr_in6 sin6; 4700 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 4701 struct sctp_auth_random *p_random = NULL; 4702 uint16_t random_len = 0; 4703 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 4704 struct sctp_auth_hmac_algo *hmacs = NULL; 4705 uint16_t hmacs_len = 0; 4706 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 4707 struct sctp_auth_chunk_list *chunks = NULL; 4708 uint16_t num_chunks = 0; 4709 sctp_key_t *new_key; 4710 uint32_t keylen; 4711 int got_random = 0, got_hmacs = 0, got_chklist = 0; 4712 4713 /* First get the destination address setup too. */ 4714 memset(&sin, 0, sizeof(sin)); 4715 memset(&sin6, 0, sizeof(sin6)); 4716 4717 sin.sin_family = AF_INET; 4718 sin.sin_len = sizeof(sin); 4719 sin.sin_port = stcb->rport; 4720 4721 sin6.sin6_family = AF_INET6; 4722 sin6.sin6_len = sizeof(struct sockaddr_in6); 4723 sin6.sin6_port = stcb->rport; 4724 if (altsa == NULL) { 4725 iph = mtod(m, struct ip *); 4726 if (iph->ip_v == IPVERSION) { 4727 /* its IPv4 */ 4728 struct sockaddr_in *sin_2; 4729 4730 sin_2 = (struct sockaddr_in *)(local_sa); 4731 memset(sin_2, 0, sizeof(sin)); 4732 sin_2->sin_family = AF_INET; 4733 sin_2->sin_len = sizeof(sin); 4734 sin_2->sin_port = sh->dest_port; 4735 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 4736 sin.sin_addr = iph->ip_src; 4737 sa = (struct sockaddr *)&sin; 4738 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 4739 /* its IPv6 */ 4740 struct ip6_hdr *ip6; 4741 struct sockaddr_in6 *sin6_2; 4742 4743 ip6 = mtod(m, struct ip6_hdr *); 4744 sin6_2 = (struct sockaddr_in6 *)(local_sa); 4745 memset(sin6_2, 0, sizeof(sin6)); 4746 sin6_2->sin6_family = AF_INET6; 4747 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 4748 sin6_2->sin6_port = sh->dest_port; 4749 sin6.sin6_addr = ip6->ip6_src; 4750 sa = (struct sockaddr *)&sin6; 4751 } else { 4752 sa = NULL; 4753 } 4754 } else { 4755 /* 4756 * For cookies we use the src address NOT from the packet 4757 * but from the original INIT 4758 */ 4759 sa = altsa; 4760 } 4761 /* Turn off ECN until we get through all params */ 4762 stcb->asoc.ecn_allowed = 0; 4763 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4764 /* mark all addresses that we have currently on the list */ 4765 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 4766 } 4767 /* does the source address already exist? if so skip it */ 4768 l_inp = inp = stcb->sctp_ep; 4769 4770 atomic_add_int(&stcb->asoc.refcnt, 1); 4771 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 4772 atomic_add_int(&stcb->asoc.refcnt, -1); 4773 4774 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 4775 /* we must add the source address */ 4776 /* no scope set here since we have a tcb already. */ 4777 if ((sa->sa_family == AF_INET) && 4778 (stcb->asoc.ipv4_addr_legal)) { 4779 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 4780 return (-1); 4781 } 4782 } else if ((sa->sa_family == AF_INET6) && 4783 (stcb->asoc.ipv6_addr_legal)) { 4784 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 4785 return (-2); 4786 } 4787 } 4788 } else { 4789 if (net_tmp != NULL && stcb_tmp == stcb) { 4790 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 4791 } else if (stcb_tmp != stcb) { 4792 /* It belongs to another association? */ 4793 SCTP_TCB_UNLOCK(stcb_tmp); 4794 return (-3); 4795 } 4796 } 4797 if (stcb->asoc.state == 0) { 4798 /* the assoc was freed? */ 4799 return (-4); 4800 } 4801 /* now we must go through each of the params. */ 4802 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 4803 while (phdr) { 4804 ptype = ntohs(phdr->param_type); 4805 plen = ntohs(phdr->param_length); 4806 /* 4807 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 4808 * (int)plen); 4809 */ 4810 if (offset + plen > limit) { 4811 break; 4812 } 4813 if (plen == 0) { 4814 break; 4815 } 4816 if (ptype == SCTP_IPV4_ADDRESS) { 4817 if (stcb->asoc.ipv4_addr_legal) { 4818 struct sctp_ipv4addr_param *p4, p4_buf; 4819 4820 /* ok get the v4 address and check/add */ 4821 phdr = sctp_get_next_param(m, offset, 4822 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 4823 if (plen != sizeof(struct sctp_ipv4addr_param) || 4824 phdr == NULL) { 4825 return (-5); 4826 } 4827 p4 = (struct sctp_ipv4addr_param *)phdr; 4828 sin.sin_addr.s_addr = p4->addr; 4829 if (IN_MULTICAST(sin.sin_addr.s_addr)) { 4830 /* Skip multi-cast addresses */ 4831 goto next_param; 4832 } 4833 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 4834 (sin.sin_addr.s_addr == INADDR_ANY)) { 4835 goto next_param; 4836 } 4837 sa = (struct sockaddr *)&sin; 4838 inp = stcb->sctp_ep; 4839 atomic_add_int(&stcb->asoc.refcnt, 1); 4840 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 4841 local_sa, stcb); 4842 atomic_add_int(&stcb->asoc.refcnt, -1); 4843 4844 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 4845 inp == NULL) { 4846 /* we must add the source address */ 4847 /* 4848 * no scope set since we have a tcb 4849 * already 4850 */ 4851 4852 /* 4853 * we must validate the state again 4854 * here 4855 */ 4856 if (stcb->asoc.state == 0) { 4857 /* the assoc was freed? */ 4858 return (-7); 4859 } 4860 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 4861 return (-8); 4862 } 4863 } else if (stcb_tmp == stcb) { 4864 if (stcb->asoc.state == 0) { 4865 /* the assoc was freed? */ 4866 return (-10); 4867 } 4868 if (net != NULL) { 4869 /* clear flag */ 4870 net->dest_state &= 4871 ~SCTP_ADDR_NOT_IN_ASSOC; 4872 } 4873 } else { 4874 /* 4875 * strange, address is in another 4876 * assoc? straighten out locks. 4877 */ 4878 if (stcb->asoc.state == 0) { 4879 /* the assoc was freed? */ 4880 return (-12); 4881 } 4882 return (-13); 4883 } 4884 } 4885 } else if (ptype == SCTP_IPV6_ADDRESS) { 4886 if (stcb->asoc.ipv6_addr_legal) { 4887 /* ok get the v6 address and check/add */ 4888 struct sctp_ipv6addr_param *p6, p6_buf; 4889 4890 phdr = sctp_get_next_param(m, offset, 4891 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 4892 if (plen != sizeof(struct sctp_ipv6addr_param) || 4893 phdr == NULL) { 4894 return (-14); 4895 } 4896 p6 = (struct sctp_ipv6addr_param *)phdr; 4897 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 4898 sizeof(p6->addr)); 4899 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 4900 /* Skip multi-cast addresses */ 4901 goto next_param; 4902 } 4903 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 4904 /* 4905 * Link local make no sense without 4906 * scope 4907 */ 4908 goto next_param; 4909 } 4910 sa = (struct sockaddr *)&sin6; 4911 inp = stcb->sctp_ep; 4912 atomic_add_int(&stcb->asoc.refcnt, 1); 4913 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 4914 local_sa, stcb); 4915 atomic_add_int(&stcb->asoc.refcnt, -1); 4916 if (stcb_tmp == NULL && (inp == stcb->sctp_ep || 4917 inp == NULL)) { 4918 /* 4919 * we must validate the state again 4920 * here 4921 */ 4922 if (stcb->asoc.state == 0) { 4923 /* the assoc was freed? */ 4924 return (-16); 4925 } 4926 /* 4927 * we must add the address, no scope 4928 * set 4929 */ 4930 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 4931 return (-17); 4932 } 4933 } else if (stcb_tmp == stcb) { 4934 /* 4935 * we must validate the state again 4936 * here 4937 */ 4938 if (stcb->asoc.state == 0) { 4939 /* the assoc was freed? */ 4940 return (-19); 4941 } 4942 if (net != NULL) { 4943 /* clear flag */ 4944 net->dest_state &= 4945 ~SCTP_ADDR_NOT_IN_ASSOC; 4946 } 4947 } else { 4948 /* 4949 * strange, address is in another 4950 * assoc? straighten out locks. 4951 */ 4952 if (stcb->asoc.state == 0) { 4953 /* the assoc was freed? */ 4954 return (-21); 4955 } 4956 return (-22); 4957 } 4958 } 4959 } else if (ptype == SCTP_ECN_CAPABLE) { 4960 stcb->asoc.ecn_allowed = 1; 4961 } else if (ptype == SCTP_ULP_ADAPTATION) { 4962 if (stcb->asoc.state != SCTP_STATE_OPEN) { 4963 struct sctp_adaptation_layer_indication ai, 4964 *aip; 4965 4966 phdr = sctp_get_next_param(m, offset, 4967 (struct sctp_paramhdr *)&ai, sizeof(ai)); 4968 aip = (struct sctp_adaptation_layer_indication *)phdr; 4969 if (aip) { 4970 sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION, 4971 stcb, ntohl(aip->indication), NULL); 4972 } 4973 } 4974 } else if (ptype == SCTP_SET_PRIM_ADDR) { 4975 struct sctp_asconf_addr_param lstore, *fee; 4976 struct sctp_asconf_addrv4_param *fii; 4977 int lptype; 4978 struct sockaddr *lsa = NULL; 4979 4980 stcb->asoc.peer_supports_asconf = 1; 4981 if (plen > sizeof(lstore)) { 4982 return (-23); 4983 } 4984 phdr = sctp_get_next_param(m, offset, 4985 (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore))); 4986 if (phdr == NULL) { 4987 return (-24); 4988 } 4989 fee = (struct sctp_asconf_addr_param *)phdr; 4990 lptype = ntohs(fee->addrp.ph.param_type); 4991 if (lptype == SCTP_IPV4_ADDRESS) { 4992 if (plen != 4993 sizeof(struct sctp_asconf_addrv4_param)) { 4994 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 4995 (int)sizeof(struct sctp_asconf_addrv4_param), 4996 plen); 4997 } else { 4998 fii = (struct sctp_asconf_addrv4_param *)fee; 4999 sin.sin_addr.s_addr = fii->addrp.addr; 5000 lsa = (struct sockaddr *)&sin; 5001 } 5002 } else if (lptype == SCTP_IPV6_ADDRESS) { 5003 if (plen != 5004 sizeof(struct sctp_asconf_addr_param)) { 5005 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 5006 (int)sizeof(struct sctp_asconf_addr_param), 5007 plen); 5008 } else { 5009 memcpy(sin6.sin6_addr.s6_addr, 5010 fee->addrp.addr, 5011 sizeof(fee->addrp.addr)); 5012 lsa = (struct sockaddr *)&sin6; 5013 } 5014 } 5015 if (lsa) { 5016 (void)sctp_set_primary_addr(stcb, sa, NULL); 5017 } 5018 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 5019 /* Peer supports pr-sctp */ 5020 stcb->asoc.peer_supports_prsctp = 1; 5021 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 5022 /* A supported extension chunk */ 5023 struct sctp_supported_chunk_types_param *pr_supported; 5024 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 5025 int num_ent, i; 5026 5027 phdr = sctp_get_next_param(m, offset, 5028 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 5029 if (phdr == NULL) { 5030 return (-25); 5031 } 5032 stcb->asoc.peer_supports_asconf = 0; 5033 stcb->asoc.peer_supports_prsctp = 0; 5034 stcb->asoc.peer_supports_pktdrop = 0; 5035 stcb->asoc.peer_supports_strreset = 0; 5036 stcb->asoc.peer_supports_auth = 0; 5037 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 5038 num_ent = plen - sizeof(struct sctp_paramhdr); 5039 for (i = 0; i < num_ent; i++) { 5040 switch (pr_supported->chunk_types[i]) { 5041 case SCTP_ASCONF: 5042 case SCTP_ASCONF_ACK: 5043 stcb->asoc.peer_supports_asconf = 1; 5044 break; 5045 case SCTP_FORWARD_CUM_TSN: 5046 stcb->asoc.peer_supports_prsctp = 1; 5047 break; 5048 case SCTP_PACKET_DROPPED: 5049 stcb->asoc.peer_supports_pktdrop = 1; 5050 break; 5051 case SCTP_STREAM_RESET: 5052 stcb->asoc.peer_supports_strreset = 1; 5053 break; 5054 case SCTP_AUTHENTICATION: 5055 stcb->asoc.peer_supports_auth = 1; 5056 break; 5057 default: 5058 /* one I have not learned yet */ 5059 break; 5060 5061 } 5062 } 5063 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 5064 /* Peer supports ECN-nonce */ 5065 stcb->asoc.peer_supports_ecn_nonce = 1; 5066 stcb->asoc.ecn_nonce_allowed = 1; 5067 } else if (ptype == SCTP_RANDOM) { 5068 if (plen > sizeof(random_store)) 5069 break; 5070 if (got_random) { 5071 /* already processed a RANDOM */ 5072 goto next_param; 5073 } 5074 phdr = sctp_get_next_param(m, offset, 5075 (struct sctp_paramhdr *)random_store, 5076 min(sizeof(random_store), plen)); 5077 if (phdr == NULL) 5078 return (-26); 5079 p_random = (struct sctp_auth_random *)phdr; 5080 random_len = plen - sizeof(*p_random); 5081 /* enforce the random length */ 5082 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 5083 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 5084 return (-27); 5085 } 5086 got_random = 1; 5087 } else if (ptype == SCTP_HMAC_LIST) { 5088 int num_hmacs; 5089 int i; 5090 5091 if (plen > sizeof(hmacs_store)) 5092 break; 5093 if (got_hmacs) { 5094 /* already processed a HMAC list */ 5095 goto next_param; 5096 } 5097 phdr = sctp_get_next_param(m, offset, 5098 (struct sctp_paramhdr *)hmacs_store, 5099 min(plen, sizeof(hmacs_store))); 5100 if (phdr == NULL) 5101 return (-28); 5102 hmacs = (struct sctp_auth_hmac_algo *)phdr; 5103 hmacs_len = plen - sizeof(*hmacs); 5104 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 5105 /* validate the hmac list */ 5106 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 5107 return (-29); 5108 } 5109 if (stcb->asoc.peer_hmacs != NULL) 5110 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 5111 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 5112 if (stcb->asoc.peer_hmacs != NULL) { 5113 for (i = 0; i < num_hmacs; i++) { 5114 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 5115 ntohs(hmacs->hmac_ids[i])); 5116 } 5117 } 5118 got_hmacs = 1; 5119 } else if (ptype == SCTP_CHUNK_LIST) { 5120 int i; 5121 5122 if (plen > sizeof(chunks_store)) 5123 break; 5124 if (got_chklist) { 5125 /* already processed a Chunks list */ 5126 goto next_param; 5127 } 5128 phdr = sctp_get_next_param(m, offset, 5129 (struct sctp_paramhdr *)chunks_store, 5130 min(plen, sizeof(chunks_store))); 5131 if (phdr == NULL) 5132 return (-30); 5133 chunks = (struct sctp_auth_chunk_list *)phdr; 5134 num_chunks = plen - sizeof(*chunks); 5135 if (stcb->asoc.peer_auth_chunks != NULL) 5136 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 5137 else 5138 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 5139 for (i = 0; i < num_chunks; i++) { 5140 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 5141 stcb->asoc.peer_auth_chunks); 5142 } 5143 got_chklist = 1; 5144 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 5145 (ptype == SCTP_STATE_COOKIE) || 5146 (ptype == SCTP_UNRECOG_PARAM) || 5147 (ptype == SCTP_COOKIE_PRESERVE) || 5148 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 5149 (ptype == SCTP_ADD_IP_ADDRESS) || 5150 (ptype == SCTP_DEL_IP_ADDRESS) || 5151 (ptype == SCTP_ERROR_CAUSE_IND) || 5152 (ptype == SCTP_SUCCESS_REPORT)) { 5153 /* don't care */ ; 5154 } else { 5155 if ((ptype & 0x8000) == 0x0000) { 5156 /* 5157 * must stop processing the rest of the 5158 * param's. Any report bits were handled 5159 * with the call to 5160 * sctp_arethere_unrecognized_parameters() 5161 * when the INIT or INIT-ACK was first seen. 5162 */ 5163 break; 5164 } 5165 } 5166next_param: 5167 offset += SCTP_SIZE32(plen); 5168 if (offset >= limit) { 5169 break; 5170 } 5171 phdr = sctp_get_next_param(m, offset, &parm_buf, 5172 sizeof(parm_buf)); 5173 } 5174 /* Now check to see if we need to purge any addresses */ 5175 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { 5176 net_tmp = TAILQ_NEXT(net, sctp_next); 5177 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 5178 SCTP_ADDR_NOT_IN_ASSOC) { 5179 /* This address has been removed from the asoc */ 5180 /* remove and free it */ 5181 stcb->asoc.numnets--; 5182 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 5183 sctp_free_remote_addr(net); 5184 if (net == stcb->asoc.primary_destination) { 5185 stcb->asoc.primary_destination = NULL; 5186 sctp_select_primary_destination(stcb); 5187 } 5188 } 5189 } 5190 /* validate authentication required parameters */ 5191 if (got_random && got_hmacs) { 5192 stcb->asoc.peer_supports_auth = 1; 5193 } else { 5194 stcb->asoc.peer_supports_auth = 0; 5195 } 5196 if (!stcb->asoc.peer_supports_auth && got_chklist) { 5197 /* peer does not support auth but sent a chunks list? */ 5198 return (-31); 5199 } 5200 if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf && 5201 !stcb->asoc.peer_supports_auth) { 5202 /* peer supports asconf but not auth? */ 5203 return (-32); 5204 } 5205 /* concatenate the full random key */ 5206#ifdef SCTP_AUTH_DRAFT_04 5207 keylen = random_len; 5208 new_key = sctp_alloc_key(keylen); 5209 if (new_key != NULL) { 5210 /* copy in the RANDOM */ 5211 if (p_random != NULL) 5212 bcopy(p_random->random_data, new_key->key, random_len); 5213 } 5214#else 5215 keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks + 5216 sizeof(*hmacs) + hmacs_len; 5217 new_key = sctp_alloc_key(keylen); 5218 if (new_key != NULL) { 5219 /* copy in the RANDOM */ 5220 if (p_random != NULL) { 5221 keylen = sizeof(*p_random) + random_len; 5222 bcopy(p_random, new_key->key, keylen); 5223 } 5224 /* append in the AUTH chunks */ 5225 if (chunks != NULL) { 5226 bcopy(chunks, new_key->key + keylen, 5227 sizeof(*chunks) + num_chunks); 5228 keylen += sizeof(*chunks) + num_chunks; 5229 } 5230 /* append in the HMACs */ 5231 if (hmacs != NULL) { 5232 bcopy(hmacs, new_key->key + keylen, 5233 sizeof(*hmacs) + hmacs_len); 5234 } 5235 } 5236#endif 5237 else { 5238 /* failed to get memory for the key */ 5239 return (-33); 5240 } 5241 if (stcb->asoc.authinfo.peer_random != NULL) 5242 sctp_free_key(stcb->asoc.authinfo.peer_random); 5243 stcb->asoc.authinfo.peer_random = new_key; 5244#ifdef SCTP_AUTH_DRAFT_04 5245 /* don't include the chunks and hmacs for draft -04 */ 5246 stcb->asoc.authinfo.peer_random->keylen = random_len; 5247#endif 5248 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 5249 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 5250 5251 return (0); 5252} 5253 5254int 5255sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 5256 struct sctp_nets *net) 5257{ 5258 /* make sure the requested primary address exists in the assoc */ 5259 if (net == NULL && sa) 5260 net = sctp_findnet(stcb, sa); 5261 5262 if (net == NULL) { 5263 /* didn't find the requested primary address! */ 5264 return (-1); 5265 } else { 5266 /* set the primary address */ 5267 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 5268 /* Must be confirmed, so queue to set */ 5269 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 5270 return (0); 5271 } 5272 stcb->asoc.primary_destination = net; 5273 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 5274 net = TAILQ_FIRST(&stcb->asoc.nets); 5275 if (net != stcb->asoc.primary_destination) { 5276 /* 5277 * first one on the list is NOT the primary 5278 * sctp_cmpaddr() is much more efficent if the 5279 * primary is the first on the list, make it so. 5280 */ 5281 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 5282 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 5283 } 5284 return (0); 5285 } 5286} 5287 5288 5289int 5290sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now) 5291{ 5292 /* 5293 * This function serves two purposes. It will see if a TAG can be 5294 * re-used and return 1 for yes it is ok and 0 for don't use that 5295 * tag. A secondary function it will do is purge out old tags that 5296 * can be removed. 5297 */ 5298 struct sctpasochead *head; 5299 struct sctpvtaghead *chain; 5300 struct sctp_tagblock *twait_block; 5301 struct sctp_tcb *stcb; 5302 int i; 5303 5304 SCTP_INP_INFO_WLOCK(); 5305 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 5306 /* First is the vtag in use ? */ 5307 5308 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag, 5309 sctppcbinfo.hashasocmark)]; 5310 if (head == NULL) { 5311 goto check_restart; 5312 } 5313 LIST_FOREACH(stcb, head, sctp_asocs) { 5314 5315 if (stcb->asoc.my_vtag == tag) { 5316 /* 5317 * We should remove this if and return 0 always if 5318 * we want vtags unique across all endpoints. For 5319 * now within a endpoint is ok. 5320 */ 5321 if (inp == stcb->sctp_ep) { 5322 /* bad tag, in use */ 5323 SCTP_INP_INFO_WUNLOCK(); 5324 return (0); 5325 } 5326 } 5327 } 5328check_restart: 5329 /* Now lets check the restart hash */ 5330 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag, 5331 sctppcbinfo.hashrestartmark)]; 5332 if (head == NULL) { 5333 goto check_time_wait; 5334 } 5335 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { 5336 if (stcb->asoc.assoc_id == tag) { 5337 /* candidate */ 5338 if (inp == stcb->sctp_ep) { 5339 /* bad tag, in use */ 5340 SCTP_INP_INFO_WUNLOCK(); 5341 return (0); 5342 } 5343 } 5344 } 5345check_time_wait: 5346 /* Now what about timed wait ? */ 5347 if (!SCTP_LIST_EMPTY(chain)) { 5348 /* 5349 * Block(s) are present, lets see if we have this tag in the 5350 * list 5351 */ 5352 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5353 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 5354 if (twait_block->vtag_block[i].v_tag == 0) { 5355 /* not used */ 5356 continue; 5357 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire > 5358 now->tv_sec) { 5359 /* Audit expires this guy */ 5360 twait_block->vtag_block[i].tv_sec_at_expire = 0; 5361 twait_block->vtag_block[i].v_tag = 0; 5362 } else if (twait_block->vtag_block[i].v_tag == 5363 tag) { 5364 /* Bad tag, sorry :< */ 5365 SCTP_INP_INFO_WUNLOCK(); 5366 return (0); 5367 } 5368 } 5369 } 5370 } 5371 /* Not found, ok to use the tag */ 5372 SCTP_INP_INFO_WUNLOCK(); 5373 return (1); 5374} 5375 5376 5377static sctp_assoc_t reneged_asoc_ids[256]; 5378static uint8_t reneged_at = 0; 5379 5380 5381static void 5382sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 5383{ 5384 /* 5385 * We must hunt this association for MBUF's past the cumack (i.e. 5386 * out of order data that we can renege on). 5387 */ 5388 struct sctp_association *asoc; 5389 struct sctp_tmit_chunk *chk, *nchk; 5390 uint32_t cumulative_tsn_p1, tsn; 5391 struct sctp_queued_to_read *ctl, *nctl; 5392 int cnt, strmat, gap; 5393 5394 /* We look for anything larger than the cum-ack + 1 */ 5395 5396 SCTP_STAT_INCR(sctps_protocol_drain_calls); 5397 if (sctp_do_drain == 0) { 5398 return; 5399 } 5400 asoc = &stcb->asoc; 5401 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 5402 /* none we can reneg on. */ 5403 return; 5404 } 5405 SCTP_STAT_INCR(sctps_protocol_drains_done); 5406 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 5407 cnt = 0; 5408 /* First look in the re-assembly queue */ 5409 chk = TAILQ_FIRST(&asoc->reasmqueue); 5410 while (chk) { 5411 /* Get the next one */ 5412 nchk = TAILQ_NEXT(chk, sctp_next); 5413 if (compare_with_wrap(chk->rec.data.TSN_seq, 5414 cumulative_tsn_p1, MAX_TSN)) { 5415 /* Yep it is above cum-ack */ 5416 cnt++; 5417 tsn = chk->rec.data.TSN_seq; 5418 if (tsn >= asoc->mapping_array_base_tsn) { 5419 gap = tsn - asoc->mapping_array_base_tsn; 5420 } else { 5421 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 5422 tsn + 1; 5423 } 5424 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 5425 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 5426 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 5427 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5428 if (chk->data) { 5429 sctp_m_freem(chk->data); 5430 chk->data = NULL; 5431 } 5432 sctp_free_remote_addr(chk->whoTo); 5433 sctp_free_a_chunk(stcb, chk); 5434 } 5435 chk = nchk; 5436 } 5437 /* Ok that was fun, now we will drain all the inbound streams? */ 5438 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 5439 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); 5440 while (ctl) { 5441 nctl = TAILQ_NEXT(ctl, next); 5442 if (compare_with_wrap(ctl->sinfo_tsn, 5443 cumulative_tsn_p1, MAX_TSN)) { 5444 /* Yep it is above cum-ack */ 5445 cnt++; 5446 tsn = ctl->sinfo_tsn; 5447 if (tsn >= asoc->mapping_array_base_tsn) { 5448 gap = tsn - 5449 asoc->mapping_array_base_tsn; 5450 } else { 5451 gap = (MAX_TSN - 5452 asoc->mapping_array_base_tsn) + 5453 tsn + 1; 5454 } 5455 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 5456 sctp_ucount_decr(asoc->cnt_on_all_streams); 5457 5458 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, 5459 gap); 5460 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, 5461 ctl, next); 5462 if (ctl->data) { 5463 sctp_m_freem(ctl->data); 5464 ctl->data = NULL; 5465 } 5466 sctp_free_remote_addr(ctl->whoFrom); 5467 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); 5468 SCTP_DECR_READQ_COUNT(); 5469 } 5470 ctl = nctl; 5471 } 5472 } 5473 /* 5474 * Question, should we go through the delivery queue? The only 5475 * reason things are on here is the app not reading OR a p-d-api up. 5476 * An attacker COULD send enough in to initiate the PD-API and then 5477 * send a bunch of stuff to other streams... these would wind up on 5478 * the delivery queue.. and then we would not get to them. But in 5479 * order to do this I then have to back-track and un-deliver 5480 * sequence numbers in streams.. el-yucko. I think for now we will 5481 * NOT look at the delivery queue and leave it to be something to 5482 * consider later. An alternative would be to abort the P-D-API with 5483 * a notification and then deliver the data.... Or another method 5484 * might be to keep track of how many times the situation occurs and 5485 * if we see a possible attack underway just abort the association. 5486 */ 5487#ifdef SCTP_DEBUG 5488 if (cnt) { 5489 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 5490 } 5491#endif 5492 if (cnt) { 5493 /* 5494 * Now do we need to find a new 5495 * asoc->highest_tsn_inside_map? 5496 */ 5497 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) { 5498 gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn; 5499 } else { 5500 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 5501 asoc->highest_tsn_inside_map + 1; 5502 } 5503 if (gap >= (asoc->mapping_array_size << 3)) { 5504 /* 5505 * Something bad happened or cum-ack and high were 5506 * behind the base, but if so earlier checks should 5507 * have found NO data... wierd... we will start at 5508 * end of mapping array. 5509 */ 5510 SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n", 5511 (int)gap, 5512 (int)(asoc->mapping_array_size << 3), 5513 (int)asoc->highest_tsn_inside_map); 5514 gap = asoc->mapping_array_size << 3; 5515 } 5516 while (gap > 0) { 5517 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 5518 /* found the new highest */ 5519 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap; 5520 break; 5521 } 5522 gap--; 5523 } 5524 if (gap == 0) { 5525 /* Nothing left in map */ 5526 memset(asoc->mapping_array, 0, asoc->mapping_array_size); 5527 asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1; 5528 asoc->highest_tsn_inside_map = asoc->cumulative_tsn; 5529 } 5530 asoc->last_revoke_count = cnt; 5531 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 5532 sctp_send_sack(stcb); 5533 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN); 5534 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 5535 reneged_at++; 5536 } 5537 /* 5538 * Another issue, in un-setting the TSN's in the mapping array we 5539 * DID NOT adjust the higest_tsn marker. This will cause one of two 5540 * things to occur. It may cause us to do extra work in checking for 5541 * our mapping array movement. More importantly it may cause us to 5542 * SACK every datagram. This may not be a bad thing though since we 5543 * will recover once we get our cum-ack above and all this stuff we 5544 * dumped recovered. 5545 */ 5546} 5547 5548void 5549sctp_drain() 5550{ 5551 /* 5552 * We must walk the PCB lists for ALL associations here. The system 5553 * is LOW on MBUF's and needs help. This is where reneging will 5554 * occur. We really hope this does NOT happen! 5555 */ 5556 struct sctp_inpcb *inp; 5557 struct sctp_tcb *stcb; 5558 5559 SCTP_INP_INFO_RLOCK(); 5560 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 5561 /* For each endpoint */ 5562 SCTP_INP_RLOCK(inp); 5563 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5564 /* For each association */ 5565 SCTP_TCB_LOCK(stcb); 5566 sctp_drain_mbufs(inp, stcb); 5567 SCTP_TCB_UNLOCK(stcb); 5568 } 5569 SCTP_INP_RUNLOCK(inp); 5570 } 5571 SCTP_INP_INFO_RUNLOCK(); 5572} 5573 5574/* 5575 * start a new iterator 5576 * iterates through all endpoints and associations based on the pcb_state 5577 * flags and asoc_state. "af" (mandatory) is executed for all matching 5578 * assocs and "ef" (optional) is executed when the iterator completes. 5579 * "inpf" (optional) is executed for each new endpoint as it is being 5580 * iterated through. inpe (optional) is called when the inp completes 5581 * its way through all the stcbs. 5582 */ 5583int 5584sctp_initiate_iterator(inp_func inpf, 5585 asoc_func af, 5586 inp_func inpe, 5587 uint32_t pcb_state, 5588 uint32_t pcb_features, 5589 uint32_t asoc_state, 5590 void *argp, 5591 uint32_t argi, 5592 end_func ef, 5593 struct sctp_inpcb *s_inp, 5594 uint8_t chunk_output_off) 5595{ 5596 struct sctp_iterator *it = NULL; 5597 5598 if (af == NULL) { 5599 return (-1); 5600 } 5601 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 5602 SCTP_M_ITER); 5603 if (it == NULL) { 5604 return (ENOMEM); 5605 } 5606 memset(it, 0, sizeof(*it)); 5607 it->function_assoc = af; 5608 it->function_inp = inpf; 5609 if (inpf) 5610 it->done_current_ep = 0; 5611 else 5612 it->done_current_ep = 1; 5613 it->function_atend = ef; 5614 it->pointer = argp; 5615 it->val = argi; 5616 it->pcb_flags = pcb_state; 5617 it->pcb_features = pcb_features; 5618 it->asoc_state = asoc_state; 5619 it->function_inp_end = inpe; 5620 it->no_chunk_output = chunk_output_off; 5621 if (s_inp) { 5622 it->inp = s_inp; 5623 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 5624 } else { 5625 SCTP_INP_INFO_RLOCK(); 5626 it->inp = LIST_FIRST(&sctppcbinfo.listhead); 5627 5628 SCTP_INP_INFO_RUNLOCK(); 5629 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 5630 5631 } 5632 SCTP_IPI_ITERATOR_WQ_LOCK(); 5633 if (it->inp) { 5634 SCTP_INP_INCR_REF(it->inp); 5635 } 5636 TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr); 5637#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 5638 if (sctppcbinfo.iterator_running == 0) { 5639 sctp_wakeup_iterator(); 5640 } 5641 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5642#else 5643 if (it->inp) 5644 SCTP_INP_DECR_REF(it->inp); 5645 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5646 /* Init the timer */ 5647 SCTP_OS_TIMER_INIT(&it->tmr.timer); 5648 /* add to the list of all iterators */ 5649 sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it, 5650 NULL, NULL); 5651#endif 5652 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 5653 return (0); 5654} 5655