sctp_pcb.c revision 170205
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 170205 2007-06-02 11:05:08Z 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 /* now also setup table ids */ 159 SCTP_INIT_VRF_TABLEID(vrf); 160 /* Init the HASH of addresses */ 161 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 162 &vrf->vrf_addr_hashmark); 163 if (vrf->vrf_addr_hash == NULL) { 164 /* No memory */ 165#ifdef INVARIANTS 166 panic("No memory for VRF:%d", vrf_id); 167#endif 168 SCTP_FREE(vrf, SCTP_M_VRF); 169 return (NULL); 170 } 171 /* Add it to the hash table */ 172 bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)]; 173 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 174 atomic_add_int(&sctppcbinfo.ipi_count_vrfs, 1); 175 return (vrf); 176} 177 178 179struct sctp_ifn * 180sctp_find_ifn(void *ifn, uint32_t ifn_index) 181{ 182 struct sctp_ifn *sctp_ifnp; 183 struct sctp_ifnlist *hash_ifn_head; 184 185 /* 186 * We assume the lock is held for the addresses if thats wrong 187 * problems could occur :-) 188 */ 189 hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)]; 190 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 191 if (sctp_ifnp->ifn_index == ifn_index) { 192 return (sctp_ifnp); 193 } 194 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 195 return (sctp_ifnp); 196 } 197 } 198 return (NULL); 199} 200 201 202 203struct sctp_vrf * 204sctp_find_vrf(uint32_t vrf_id) 205{ 206 struct sctp_vrflist *bucket; 207 struct sctp_vrf *liste; 208 209 bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)]; 210 LIST_FOREACH(liste, bucket, next_vrf) { 211 if (vrf_id == liste->vrf_id) { 212 return (liste); 213 } 214 } 215 return (NULL); 216} 217 218 219void 220sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 221{ 222 int ret; 223 224 ret = atomic_fetchadd_int(&sctp_ifnp->refcount, -1); 225 if (ret == 1) { 226 /* We zero'd the count */ 227 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 228 atomic_subtract_int(&sctppcbinfo.ipi_count_ifns, 1); 229 } 230} 231 232void 233sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 234{ 235 struct sctp_ifn *sctp_ifnp; 236 237 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 238 if (sctp_ifnp != NULL) { 239 sctp_ifnp->ifn_mtu = mtu; 240 } 241} 242 243 244void 245sctp_free_ifa(struct sctp_ifa *sctp_ifap) 246{ 247 int ret; 248 249 ret = atomic_fetchadd_int(&sctp_ifap->refcount, -1); 250 if (ret == 1) { 251 /* We zero'd the count */ 252 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 253 atomic_subtract_int(&sctppcbinfo.ipi_count_ifas, 1); 254 } 255} 256 257static void 258sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 259{ 260 struct sctp_ifn *found; 261 262 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 263 if (found == NULL) { 264 /* Not in the list.. sorry */ 265 return; 266 } 267 if (hold_addr_lock == 0) 268 SCTP_IPI_ADDR_LOCK(); 269 LIST_REMOVE(sctp_ifnp, next_bucket); 270 LIST_REMOVE(sctp_ifnp, next_ifn); 271 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 272 sctp_ifnp->registered_af); 273 if (hold_addr_lock == 0) 274 SCTP_IPI_ADDR_UNLOCK(); 275 /* Take away the reference, and possibly free it */ 276 sctp_free_ifn(sctp_ifnp); 277} 278 279 280struct sctp_ifa * 281sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 282 uint32_t ifn_type, const char *if_name, 283 void *ifa, struct sockaddr *addr, uint32_t ifa_flags, 284 int dynamic_add) 285{ 286 struct sctp_vrf *vrf; 287 struct sctp_ifn *sctp_ifnp = NULL; 288 struct sctp_ifa *sctp_ifap = NULL; 289 struct sctp_ifalist *hash_addr_head; 290 struct sctp_ifnlist *hash_ifn_head; 291 uint32_t hash_of_addr; 292 int new_ifn_af = 0; 293 294 /* How granular do we need the locks to be here? */ 295 SCTP_IPI_ADDR_LOCK(); 296 vrf = sctp_find_vrf(vrf_id); 297 if (vrf == NULL) { 298 vrf = sctp_allocate_vrf(vrf_id); 299 if (vrf == NULL) { 300 SCTP_IPI_ADDR_UNLOCK(); 301 return (NULL); 302 } 303 } 304 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 305 if (sctp_ifnp == NULL) { 306 /* 307 * build one and add it, can't hold lock until after malloc 308 * done though. 309 */ 310 SCTP_IPI_ADDR_UNLOCK(); 311 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, sizeof(struct sctp_ifn), SCTP_M_IFN); 312 if (sctp_ifnp == NULL) { 313#ifdef INVARIANTS 314 panic("No memory for IFN:%u", sctp_ifnp->ifn_index); 315#endif 316 return (NULL); 317 } 318 sctp_ifnp->ifn_index = ifn_index; 319 sctp_ifnp->ifn_p = ifn; 320 sctp_ifnp->ifn_type = ifn_type; 321 sctp_ifnp->ifa_count = 0; 322 sctp_ifnp->refcount = 1; 323 sctp_ifnp->vrf = vrf; 324 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 325 if (if_name != NULL) { 326 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ); 327 } else { 328 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ)); 329 } 330 hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)]; 331 LIST_INIT(&sctp_ifnp->ifalist); 332 SCTP_IPI_ADDR_LOCK(); 333 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 334 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 335 atomic_add_int(&sctppcbinfo.ipi_count_ifns, 1); 336 new_ifn_af = 1; 337 } 338 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1); 339 if (sctp_ifap) { 340 /* Hmm, it already exists? */ 341 if ((sctp_ifap->ifn_p) && 342 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 343 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 344 /* easy to solve, just switch back to active */ 345 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 346 sctp_ifap->ifn_p = sctp_ifnp; 347 exit_stage_left: 348 SCTP_IPI_ADDR_UNLOCK(); 349 return (sctp_ifap); 350 } else { 351 goto exit_stage_left; 352 } 353 } else { 354 if (sctp_ifap->ifn_p) { 355 /* 356 * The first IFN gets the address, 357 * duplicates are ignored. 358 */ 359 goto exit_stage_left; 360 } else { 361 /* repair ifnp which was NULL ? */ 362 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 363 sctp_ifap->ifn_p = sctp_ifnp; 364 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 365 } 366 goto exit_stage_left; 367 } 368 } 369 SCTP_IPI_ADDR_UNLOCK(); 370 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 371 if (sctp_ifap == NULL) { 372#ifdef INVARIANTS 373 panic("No memory for IFA"); 374#endif 375 return (NULL); 376 } 377 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 378 sctp_ifap->ifn_p = sctp_ifnp; 379 atomic_add_int(&sctp_ifnp->refcount, 1); 380 381 sctp_ifap->ifa = ifa; 382 memcpy(&sctp_ifap->address, addr, addr->sa_len); 383 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 384 sctp_ifap->flags = ifa_flags; 385 /* Set scope */ 386 if (sctp_ifap->address.sa.sa_family == AF_INET) { 387 struct sockaddr_in *sin; 388 389 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 390 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 391 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 392 sctp_ifap->src_is_loop = 1; 393 } 394 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 395 sctp_ifap->src_is_priv = 1; 396 } 397 sctp_ifnp->num_v4++; 398 if (new_ifn_af) 399 new_ifn_af = AF_INET; 400 } else if (sctp_ifap->address.sa.sa_family == AF_INET6) { 401 /* ok to use deprecated addresses? */ 402 struct sockaddr_in6 *sin6; 403 404 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 405 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 406 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 407 sctp_ifap->src_is_loop = 1; 408 } 409 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 410 sctp_ifap->src_is_priv = 1; 411 } 412 sctp_ifnp->num_v6++; 413 if (new_ifn_af) 414 new_ifn_af = AF_INET6; 415 } else { 416 new_ifn_af = 0; 417 } 418 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 419 420 if ((sctp_ifap->src_is_priv == 0) && 421 (sctp_ifap->src_is_loop == 0)) { 422 sctp_ifap->src_is_glob = 1; 423 } 424 SCTP_IPI_ADDR_LOCK(); 425 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 426 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 427 sctp_ifap->refcount = 1; 428 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 429 sctp_ifnp->ifa_count++; 430 vrf->total_ifa_count++; 431 atomic_add_int(&sctppcbinfo.ipi_count_ifas, 1); 432 if (new_ifn_af) { 433 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 434 sctp_ifnp->registered_af = new_ifn_af; 435 } 436 SCTP_IPI_ADDR_UNLOCK(); 437 if (dynamic_add) { 438 /* 439 * Bump up the refcount so that when the timer completes it 440 * will drop back down. 441 */ 442 struct sctp_laddr *wi; 443 444 atomic_add_int(&sctp_ifap->refcount, 1); 445 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 446 if (wi == NULL) { 447 /* 448 * Gak, what can we do? We have lost an address 449 * change can you say HOSED? 450 */ 451 SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n"); 452 /* Opps, must decrement the count */ 453 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index); 454 return (NULL); 455 } 456 SCTP_INCR_LADDR_COUNT(); 457 bzero(wi, sizeof(*wi)); 458 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 459 wi->ifa = sctp_ifap; 460 wi->action = SCTP_ADD_IP_ADDRESS; 461 SCTP_IPI_ITERATOR_WQ_LOCK(); 462 /* 463 * Should this really be a tailq? As it is we will process 464 * the newest first :-0 465 */ 466 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr); 467 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 468 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 469 (struct sctp_inpcb *)NULL, 470 (struct sctp_tcb *)NULL, 471 (struct sctp_nets *)NULL); 472 } else { 473 /* it's ready for use */ 474 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 475 } 476 return (sctp_ifap); 477} 478 479void 480sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 481 uint32_t ifn_index) 482{ 483 struct sctp_vrf *vrf; 484 struct sctp_ifa *sctp_ifap = NULL; 485 486 SCTP_IPI_ADDR_LOCK(); 487 488 vrf = sctp_find_vrf(vrf_id); 489 if (vrf == NULL) { 490 SCTP_PRINTF("Can't find vrf_id:%d\n", vrf_id); 491 goto out_now; 492 } 493 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1); 494 if (sctp_ifap) { 495 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 496 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 497 vrf->total_ifa_count--; 498 LIST_REMOVE(sctp_ifap, next_bucket); 499 LIST_REMOVE(sctp_ifap, next_ifa); 500 if (sctp_ifap->ifn_p) { 501 sctp_ifap->ifn_p->ifa_count--; 502 if (sctp_ifap->address.sa.sa_family == AF_INET6) 503 sctp_ifap->ifn_p->num_v6--; 504 else if (sctp_ifap->address.sa.sa_family == AF_INET) 505 sctp_ifap->ifn_p->num_v4--; 506 if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 507 sctp_delete_ifn(sctp_ifap->ifn_p, 1); 508 } else { 509 if ((sctp_ifap->ifn_p->num_v6 == 0) && 510 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 511 SCTP_DEREGISTER_INTERFACE(ifn_index, 512 AF_INET6); 513 SCTP_REGISTER_INTERFACE(ifn_index, 514 AF_INET); 515 sctp_ifap->ifn_p->registered_af = AF_INET; 516 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 517 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 518 SCTP_DEREGISTER_INTERFACE(ifn_index, 519 AF_INET); 520 SCTP_REGISTER_INTERFACE(ifn_index, 521 AF_INET6); 522 sctp_ifap->ifn_p->registered_af = AF_INET6; 523 } 524 } 525 sctp_free_ifn(sctp_ifap->ifn_p); 526 sctp_ifap->ifn_p = NULL; 527 } 528 } 529#ifdef SCTP_DEBUG 530 else { 531 SCTPDBG(SCTP_DEBUG_PCB1, "Del Addr-ifn:%d Could not find address:", 532 ifn_index); 533 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 534 } 535#endif 536 537out_now: 538 SCTP_IPI_ADDR_UNLOCK(); 539 if (sctp_ifap) { 540 struct sctp_laddr *wi; 541 542 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 543 if (wi == NULL) { 544 /* 545 * Gak, what can we do? We have lost an address 546 * change can you say HOSED? 547 */ 548 SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n"); 549 550 /* Opps, must decrement the count */ 551 sctp_free_ifa(sctp_ifap); 552 return; 553 } 554 SCTP_INCR_LADDR_COUNT(); 555 bzero(wi, sizeof(*wi)); 556 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 557 wi->ifa = sctp_ifap; 558 wi->action = SCTP_DEL_IP_ADDRESS; 559 SCTP_IPI_ITERATOR_WQ_LOCK(); 560 /* 561 * Should this really be a tailq? As it is we will process 562 * the newest first :-0 563 */ 564 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr); 565 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 566 567 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 568 (struct sctp_inpcb *)NULL, 569 (struct sctp_tcb *)NULL, 570 (struct sctp_nets *)NULL); 571 } 572 return; 573} 574 575 576 577static struct sctp_tcb * 578sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 579 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 580{ 581 /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */ 582 /* 583 * If we support the TCP model, then we must now dig through to see 584 * if we can find our endpoint in the list of tcp ep's. 585 */ 586 uint16_t lport, rport; 587 struct sctppcbhead *ephead; 588 struct sctp_inpcb *inp; 589 struct sctp_laddr *laddr; 590 struct sctp_tcb *stcb; 591 struct sctp_nets *net; 592 593 if ((to == NULL) || (from == NULL)) { 594 return (NULL); 595 } 596 if (to->sa_family == AF_INET && from->sa_family == AF_INET) { 597 lport = ((struct sockaddr_in *)to)->sin_port; 598 rport = ((struct sockaddr_in *)from)->sin_port; 599 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) { 600 lport = ((struct sockaddr_in6 *)to)->sin6_port; 601 rport = ((struct sockaddr_in6 *)from)->sin6_port; 602 } else { 603 return NULL; 604 } 605 ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR( 606 (lport + rport), sctppcbinfo.hashtcpmark)]; 607 /* 608 * Ok now for each of the guys in this bucket we must look and see: 609 * - Does the remote port match. - Does there single association's 610 * addresses match this address (to). If so we update p_ep to point 611 * to this ep and return the tcb from it. 612 */ 613 LIST_FOREACH(inp, ephead, sctp_hash) { 614 SCTP_INP_RLOCK(inp); 615 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 616 SCTP_INP_RUNLOCK(inp); 617 continue; 618 } 619 if (lport != inp->sctp_lport) { 620 SCTP_INP_RUNLOCK(inp); 621 continue; 622 } 623 if (inp->def_vrf_id != vrf_id) { 624 SCTP_INP_RUNLOCK(inp); 625 continue; 626 } 627 /* check to see if the ep has one of the addresses */ 628 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 629 /* We are NOT bound all, so look further */ 630 int match = 0; 631 632 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 633 634 if (laddr->ifa == NULL) { 635 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 636 continue; 637 } 638 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 639 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 640 continue; 641 } 642 if (laddr->ifa->address.sa.sa_family == 643 to->sa_family) { 644 /* see if it matches */ 645 struct sockaddr_in *intf_addr, *sin; 646 647 intf_addr = &laddr->ifa->address.sin; 648 sin = (struct sockaddr_in *)to; 649 if (from->sa_family == AF_INET) { 650 if (sin->sin_addr.s_addr == 651 intf_addr->sin_addr.s_addr) { 652 match = 1; 653 break; 654 } 655 } else { 656 struct sockaddr_in6 *intf_addr6; 657 struct sockaddr_in6 *sin6; 658 659 sin6 = (struct sockaddr_in6 *) 660 to; 661 intf_addr6 = &laddr->ifa->address.sin6; 662 663 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 664 &intf_addr6->sin6_addr)) { 665 match = 1; 666 break; 667 } 668 } 669 } 670 } 671 if (match == 0) { 672 /* This endpoint does not have this address */ 673 SCTP_INP_RUNLOCK(inp); 674 continue; 675 } 676 } 677 /* 678 * Ok if we hit here the ep has the address, does it hold 679 * the tcb? 680 */ 681 682 stcb = LIST_FIRST(&inp->sctp_asoc_list); 683 if (stcb == NULL) { 684 SCTP_INP_RUNLOCK(inp); 685 continue; 686 } 687 SCTP_TCB_LOCK(stcb); 688 if (stcb->rport != rport) { 689 /* remote port does not match. */ 690 SCTP_TCB_UNLOCK(stcb); 691 SCTP_INP_RUNLOCK(inp); 692 continue; 693 } 694 /* Does this TCB have a matching address? */ 695 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 696 697 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 698 /* not the same family, can't be a match */ 699 continue; 700 } 701 if (from->sa_family == AF_INET) { 702 struct sockaddr_in *sin, *rsin; 703 704 sin = (struct sockaddr_in *)&net->ro._l_addr; 705 rsin = (struct sockaddr_in *)from; 706 if (sin->sin_addr.s_addr == 707 rsin->sin_addr.s_addr) { 708 /* found it */ 709 if (netp != NULL) { 710 *netp = net; 711 } 712 /* Update the endpoint pointer */ 713 *inp_p = inp; 714 SCTP_INP_RUNLOCK(inp); 715 return (stcb); 716 } 717 } else { 718 struct sockaddr_in6 *sin6, *rsin6; 719 720 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 721 rsin6 = (struct sockaddr_in6 *)from; 722 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 723 &rsin6->sin6_addr)) { 724 /* found it */ 725 if (netp != NULL) { 726 *netp = net; 727 } 728 /* Update the endpoint pointer */ 729 *inp_p = inp; 730 SCTP_INP_RUNLOCK(inp); 731 return (stcb); 732 } 733 } 734 } 735 SCTP_TCB_UNLOCK(stcb); 736 SCTP_INP_RUNLOCK(inp); 737 } 738 return (NULL); 739} 740 741/* 742 * rules for use 743 * 744 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 745 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 746 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 747 * NULL. 748 */ 749 750struct sctp_tcb * 751sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 752 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 753{ 754 struct sctpasochead *head; 755 struct sctp_inpcb *inp; 756 struct sctp_tcb *stcb = NULL; 757 struct sctp_nets *net; 758 uint16_t rport; 759 760 inp = *inp_p; 761 if (remote->sa_family == AF_INET) { 762 rport = (((struct sockaddr_in *)remote)->sin_port); 763 } else if (remote->sa_family == AF_INET6) { 764 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 765 } else { 766 return (NULL); 767 } 768 if (locked_tcb) { 769 /* 770 * UN-lock so we can do proper locking here this occurs when 771 * called from load_addresses_from_init. 772 */ 773 SCTP_TCB_UNLOCK(locked_tcb); 774 } 775 SCTP_INP_INFO_RLOCK(); 776 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 777 /*- 778 * Now either this guy is our listener or it's the 779 * connector. If it is the one that issued the connect, then 780 * it's only chance is to be the first TCB in the list. If 781 * it is the acceptor, then do the special_lookup to hash 782 * and find the real inp. 783 */ 784 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 785 /* to is peer addr, from is my addr */ 786 stcb = sctp_tcb_special_locate(inp_p, remote, local, 787 netp, inp->def_vrf_id); 788 if ((stcb != NULL) && (locked_tcb == NULL)) { 789 /* we have a locked tcb, lower refcount */ 790 SCTP_INP_WLOCK(inp); 791 SCTP_INP_DECR_REF(inp); 792 SCTP_INP_WUNLOCK(inp); 793 } 794 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 795 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 796 SCTP_TCB_LOCK(locked_tcb); 797 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 798 } 799 SCTP_INP_INFO_RUNLOCK(); 800 return (stcb); 801 } else { 802 SCTP_INP_WLOCK(inp); 803 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 804 goto null_return; 805 } 806 stcb = LIST_FIRST(&inp->sctp_asoc_list); 807 if (stcb == NULL) { 808 goto null_return; 809 } 810 SCTP_TCB_LOCK(stcb); 811 if (stcb->rport != rport) { 812 /* remote port does not match. */ 813 SCTP_TCB_UNLOCK(stcb); 814 goto null_return; 815 } 816 /* now look at the list of remote addresses */ 817 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 818#ifdef INVARIANTS 819 if (net == (TAILQ_NEXT(net, sctp_next))) { 820 panic("Corrupt net list"); 821 } 822#endif 823 if (net->ro._l_addr.sa.sa_family != 824 remote->sa_family) { 825 /* not the same family */ 826 continue; 827 } 828 if (remote->sa_family == AF_INET) { 829 struct sockaddr_in *sin, *rsin; 830 831 sin = (struct sockaddr_in *) 832 &net->ro._l_addr; 833 rsin = (struct sockaddr_in *)remote; 834 if (sin->sin_addr.s_addr == 835 rsin->sin_addr.s_addr) { 836 /* found it */ 837 if (netp != NULL) { 838 *netp = net; 839 } 840 if (locked_tcb == NULL) { 841 SCTP_INP_DECR_REF(inp); 842 } else if (locked_tcb != stcb) { 843 SCTP_TCB_LOCK(locked_tcb); 844 } 845 SCTP_INP_WUNLOCK(inp); 846 SCTP_INP_INFO_RUNLOCK(); 847 return (stcb); 848 } 849 } else if (remote->sa_family == AF_INET6) { 850 struct sockaddr_in6 *sin6, *rsin6; 851 852 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 853 rsin6 = (struct sockaddr_in6 *)remote; 854 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 855 &rsin6->sin6_addr)) { 856 /* found it */ 857 if (netp != NULL) { 858 *netp = net; 859 } 860 if (locked_tcb == NULL) { 861 SCTP_INP_DECR_REF(inp); 862 } else if (locked_tcb != stcb) { 863 SCTP_TCB_LOCK(locked_tcb); 864 } 865 SCTP_INP_WUNLOCK(inp); 866 SCTP_INP_INFO_RUNLOCK(); 867 return (stcb); 868 } 869 } 870 } 871 SCTP_TCB_UNLOCK(stcb); 872 } 873 } else { 874 SCTP_INP_WLOCK(inp); 875 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 876 goto null_return; 877 } 878 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 879 inp->sctp_hashmark)]; 880 if (head == NULL) { 881 goto null_return; 882 } 883 LIST_FOREACH(stcb, head, sctp_tcbhash) { 884 if (stcb->rport != rport) { 885 /* remote port does not match */ 886 continue; 887 } 888 /* now look at the list of remote addresses */ 889 SCTP_TCB_LOCK(stcb); 890 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 891#ifdef INVARIANTS 892 if (net == (TAILQ_NEXT(net, sctp_next))) { 893 panic("Corrupt net list"); 894 } 895#endif 896 if (net->ro._l_addr.sa.sa_family != 897 remote->sa_family) { 898 /* not the same family */ 899 continue; 900 } 901 if (remote->sa_family == AF_INET) { 902 struct sockaddr_in *sin, *rsin; 903 904 sin = (struct sockaddr_in *) 905 &net->ro._l_addr; 906 rsin = (struct sockaddr_in *)remote; 907 if (sin->sin_addr.s_addr == 908 rsin->sin_addr.s_addr) { 909 /* found it */ 910 if (netp != NULL) { 911 *netp = net; 912 } 913 if (locked_tcb == NULL) { 914 SCTP_INP_DECR_REF(inp); 915 } else if (locked_tcb != stcb) { 916 SCTP_TCB_LOCK(locked_tcb); 917 } 918 SCTP_INP_WUNLOCK(inp); 919 SCTP_INP_INFO_RUNLOCK(); 920 return (stcb); 921 } 922 } else if (remote->sa_family == AF_INET6) { 923 struct sockaddr_in6 *sin6, *rsin6; 924 925 sin6 = (struct sockaddr_in6 *) 926 &net->ro._l_addr; 927 rsin6 = (struct sockaddr_in6 *)remote; 928 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 929 &rsin6->sin6_addr)) { 930 /* found it */ 931 if (netp != NULL) { 932 *netp = net; 933 } 934 if (locked_tcb == NULL) { 935 SCTP_INP_DECR_REF(inp); 936 } else if (locked_tcb != stcb) { 937 SCTP_TCB_LOCK(locked_tcb); 938 } 939 SCTP_INP_WUNLOCK(inp); 940 SCTP_INP_INFO_RUNLOCK(); 941 return (stcb); 942 } 943 } 944 } 945 SCTP_TCB_UNLOCK(stcb); 946 } 947 } 948null_return: 949 /* clean up for returning null */ 950 if (locked_tcb) { 951 SCTP_TCB_LOCK(locked_tcb); 952 } 953 SCTP_INP_WUNLOCK(inp); 954 SCTP_INP_INFO_RUNLOCK(); 955 /* not found */ 956 return (NULL); 957} 958 959/* 960 * Find an association for a specific endpoint using the association id given 961 * out in the COMM_UP notification 962 */ 963 964struct sctp_tcb * 965sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 966{ 967 /* 968 * Use my the assoc_id to find a endpoint 969 */ 970 struct sctpasochead *head; 971 struct sctp_tcb *stcb; 972 uint32_t id; 973 974 if (asoc_id == 0 || inp == NULL) { 975 return (NULL); 976 } 977 SCTP_INP_INFO_RLOCK(); 978 id = (uint32_t) asoc_id; 979 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id, 980 sctppcbinfo.hashasocmark)]; 981 if (head == NULL) { 982 /* invalid id TSNH */ 983 SCTP_INP_INFO_RUNLOCK(); 984 return (NULL); 985 } 986 LIST_FOREACH(stcb, head, sctp_asocs) { 987 SCTP_INP_RLOCK(stcb->sctp_ep); 988 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 989 SCTP_INP_RUNLOCK(stcb->sctp_ep); 990 SCTP_INP_INFO_RUNLOCK(); 991 return (NULL); 992 } 993 if (stcb->asoc.assoc_id == id) { 994 /* candidate */ 995 if (inp != stcb->sctp_ep) { 996 /* 997 * some other guy has the same id active (id 998 * collision ??). 999 */ 1000 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1001 continue; 1002 } 1003 if (want_lock) { 1004 SCTP_TCB_LOCK(stcb); 1005 } 1006 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1007 SCTP_INP_INFO_RUNLOCK(); 1008 return (stcb); 1009 } 1010 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1011 } 1012 /* Ok if we missed here, lets try the restart hash */ 1013 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashrestartmark)]; 1014 if (head == NULL) { 1015 /* invalid id TSNH */ 1016 SCTP_INP_INFO_RUNLOCK(); 1017 return (NULL); 1018 } 1019 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { 1020 SCTP_INP_RLOCK(stcb->sctp_ep); 1021 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1022 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1023 continue; 1024 } 1025 if (want_lock) { 1026 SCTP_TCB_LOCK(stcb); 1027 } 1028 if (stcb->asoc.assoc_id == id) { 1029 /* candidate */ 1030 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1031 if (inp != stcb->sctp_ep) { 1032 /* 1033 * some other guy has the same id active (id 1034 * collision ??). 1035 */ 1036 if (want_lock) { 1037 SCTP_TCB_UNLOCK(stcb); 1038 } 1039 continue; 1040 } 1041 SCTP_INP_INFO_RUNLOCK(); 1042 return (stcb); 1043 } else { 1044 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1045 } 1046 if (want_lock) { 1047 SCTP_TCB_UNLOCK(stcb); 1048 } 1049 } 1050 SCTP_INP_INFO_RUNLOCK(); 1051 return (NULL); 1052} 1053 1054 1055static struct sctp_inpcb * 1056sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1057 uint16_t lport, uint32_t vrf_id) 1058{ 1059 struct sctp_inpcb *inp; 1060 struct sockaddr_in *sin; 1061 struct sockaddr_in6 *sin6; 1062 struct sctp_laddr *laddr; 1063 int fnd; 1064 1065 /* 1066 * Endpoing probe expects that the INP_INFO is locked. 1067 */ 1068 if (nam->sa_family == AF_INET) { 1069 sin = (struct sockaddr_in *)nam; 1070 sin6 = NULL; 1071 } else if (nam->sa_family == AF_INET6) { 1072 sin6 = (struct sockaddr_in6 *)nam; 1073 sin = NULL; 1074 } else { 1075 /* unsupported family */ 1076 return (NULL); 1077 } 1078 if (head == NULL) 1079 return (NULL); 1080 LIST_FOREACH(inp, head, sctp_hash) { 1081 SCTP_INP_RLOCK(inp); 1082 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1083 SCTP_INP_RUNLOCK(inp); 1084 continue; 1085 } 1086 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1087 (inp->sctp_lport == lport)) { 1088 /* got it */ 1089 if ((nam->sa_family == AF_INET) && 1090 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1091 SCTP_IPV6_V6ONLY(inp)) { 1092 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1093 SCTP_INP_RUNLOCK(inp); 1094 continue; 1095 } 1096 /* A V6 address and the endpoint is NOT bound V6 */ 1097 if (nam->sa_family == AF_INET6 && 1098 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1099 SCTP_INP_RUNLOCK(inp); 1100 continue; 1101 } 1102 /* does a VRF id match? */ 1103 fnd = 0; 1104 if (inp->def_vrf_id == vrf_id) 1105 fnd = 1; 1106 1107 SCTP_INP_RUNLOCK(inp); 1108 if (!fnd) 1109 continue; 1110 return (inp); 1111 } 1112 SCTP_INP_RUNLOCK(inp); 1113 } 1114 1115 if ((nam->sa_family == AF_INET) && 1116 (sin->sin_addr.s_addr == INADDR_ANY)) { 1117 /* Can't hunt for one that has no address specified */ 1118 return (NULL); 1119 } else if ((nam->sa_family == AF_INET6) && 1120 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 1121 /* Can't hunt for one that has no address specified */ 1122 return (NULL); 1123 } 1124 /* 1125 * ok, not bound to all so see if we can find a EP bound to this 1126 * address. 1127 */ 1128 LIST_FOREACH(inp, head, sctp_hash) { 1129 SCTP_INP_RLOCK(inp); 1130 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1131 SCTP_INP_RUNLOCK(inp); 1132 continue; 1133 } 1134 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1135 SCTP_INP_RUNLOCK(inp); 1136 continue; 1137 } 1138 /* 1139 * Ok this could be a likely candidate, look at all of its 1140 * addresses 1141 */ 1142 if (inp->sctp_lport != lport) { 1143 SCTP_INP_RUNLOCK(inp); 1144 continue; 1145 } 1146 /* does a VRF id match? */ 1147 fnd = 0; 1148 if (inp->def_vrf_id == vrf_id) 1149 fnd = 1; 1150 1151 if (!fnd) { 1152 SCTP_INP_RUNLOCK(inp); 1153 continue; 1154 } 1155 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1156 if (laddr->ifa == NULL) { 1157 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1158 __FUNCTION__); 1159 continue; 1160 } 1161 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1162 laddr->ifa); 1163 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1164 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1165 continue; 1166 } 1167 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1168 /* possible, see if it matches */ 1169 struct sockaddr_in *intf_addr; 1170 1171 intf_addr = &laddr->ifa->address.sin; 1172 if (nam->sa_family == AF_INET) { 1173 if (sin->sin_addr.s_addr == 1174 intf_addr->sin_addr.s_addr) { 1175 SCTP_INP_RUNLOCK(inp); 1176 return (inp); 1177 } 1178 } else if (nam->sa_family == AF_INET6) { 1179 struct sockaddr_in6 *intf_addr6; 1180 1181 intf_addr6 = &laddr->ifa->address.sin6; 1182 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 1183 &intf_addr6->sin6_addr)) { 1184 SCTP_INP_RUNLOCK(inp); 1185 return (inp); 1186 } 1187 } 1188 } 1189 } 1190 SCTP_INP_RUNLOCK(inp); 1191 } 1192 return (NULL); 1193} 1194 1195 1196struct sctp_inpcb * 1197sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1198 uint32_t vrf_id) 1199{ 1200 /* 1201 * First we check the hash table to see if someone has this port 1202 * bound with just the port. 1203 */ 1204 struct sctp_inpcb *inp; 1205 struct sctppcbhead *head; 1206 struct sockaddr_in *sin; 1207 struct sockaddr_in6 *sin6; 1208 int lport; 1209 1210 if (nam->sa_family == AF_INET) { 1211 sin = (struct sockaddr_in *)nam; 1212 lport = ((struct sockaddr_in *)nam)->sin_port; 1213 } else if (nam->sa_family == AF_INET6) { 1214 sin6 = (struct sockaddr_in6 *)nam; 1215 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1216 } else { 1217 /* unsupported family */ 1218 return (NULL); 1219 } 1220 /* 1221 * I could cheat here and just cast to one of the types but we will 1222 * do it right. It also provides the check against an Unsupported 1223 * type too. 1224 */ 1225 /* Find the head of the ALLADDR chain */ 1226 if (have_lock == 0) { 1227 SCTP_INP_INFO_RLOCK(); 1228 1229 } 1230 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 1231 sctppcbinfo.hashmark)]; 1232 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1233 1234 /* 1235 * If the TCP model exists it could be that the main listening 1236 * endpoint is gone but there exists a connected socket for this guy 1237 * yet. If so we can return the first one that we find. This may NOT 1238 * be the correct one but the sctp_findassociation_ep_addr has 1239 * further code to look at all TCP models. 1240 */ 1241 if (inp == NULL && find_tcp_pool) { 1242 unsigned int i; 1243 1244 for (i = 0; i < sctppcbinfo.hashtblsize; i++) { 1245 /* 1246 * This is real gross, but we do NOT have a remote 1247 * port at this point depending on who is calling. 1248 * We must therefore look for ANY one that matches 1249 * our local port :/ 1250 */ 1251 head = &sctppcbinfo.sctp_tcpephash[i]; 1252 if (LIST_FIRST(head)) { 1253 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1254 if (inp) { 1255 /* Found one */ 1256 break; 1257 } 1258 } 1259 } 1260 } 1261 if (inp) { 1262 SCTP_INP_INCR_REF(inp); 1263 } 1264 if (have_lock == 0) { 1265 SCTP_INP_INFO_RUNLOCK(); 1266 } 1267 return (inp); 1268} 1269 1270/* 1271 * Find an association for an endpoint with the pointer to whom you want to 1272 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1273 * need to change the *to to some other struct like a mbuf... 1274 */ 1275struct sctp_tcb * 1276sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1277 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, uint32_t vrf_id) 1278{ 1279 struct sctp_inpcb *inp = NULL; 1280 struct sctp_tcb *retval; 1281 1282 SCTP_INP_INFO_RLOCK(); 1283 if (find_tcp_pool) { 1284 if (inp_p != NULL) { 1285 retval = sctp_tcb_special_locate(inp_p, from, to, netp, vrf_id); 1286 } else { 1287 retval = sctp_tcb_special_locate(&inp, from, to, netp, vrf_id); 1288 } 1289 if (retval != NULL) { 1290 SCTP_INP_INFO_RUNLOCK(); 1291 return (retval); 1292 } 1293 } 1294 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1295 if (inp_p != NULL) { 1296 *inp_p = inp; 1297 } 1298 SCTP_INP_INFO_RUNLOCK(); 1299 1300 if (inp == NULL) { 1301 return (NULL); 1302 } 1303 /* 1304 * ok, we have an endpoint, now lets find the assoc for it (if any) 1305 * we now place the source address or from in the to of the find 1306 * endpoint call. Since in reality this chain is used from the 1307 * inbound packet side. 1308 */ 1309 if (inp_p != NULL) { 1310 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, NULL); 1311 } else { 1312 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, NULL); 1313 } 1314 return retval; 1315} 1316 1317 1318/* 1319 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1320 * find all addresses that the sender has specified in any address list. Each 1321 * address will be used to lookup the TCB and see if one exits. 1322 */ 1323static struct sctp_tcb * 1324sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1325 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1326 struct sockaddr *dest) 1327{ 1328 struct sockaddr_in sin4; 1329 struct sockaddr_in6 sin6; 1330 struct sctp_paramhdr *phdr, parm_buf; 1331 struct sctp_tcb *retval; 1332 uint32_t ptype, plen; 1333 1334 memset(&sin4, 0, sizeof(sin4)); 1335 memset(&sin6, 0, sizeof(sin6)); 1336 sin4.sin_len = sizeof(sin4); 1337 sin4.sin_family = AF_INET; 1338 sin4.sin_port = sh->src_port; 1339 sin6.sin6_len = sizeof(sin6); 1340 sin6.sin6_family = AF_INET6; 1341 sin6.sin6_port = sh->src_port; 1342 1343 retval = NULL; 1344 offset += sizeof(struct sctp_init_chunk); 1345 1346 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1347 while (phdr != NULL) { 1348 /* now we must see if we want the parameter */ 1349 ptype = ntohs(phdr->param_type); 1350 plen = ntohs(phdr->param_length); 1351 if (plen == 0) { 1352 break; 1353 } 1354 if (ptype == SCTP_IPV4_ADDRESS && 1355 plen == sizeof(struct sctp_ipv4addr_param)) { 1356 /* Get the rest of the address */ 1357 struct sctp_ipv4addr_param ip4_parm, *p4; 1358 1359 phdr = sctp_get_next_param(m, offset, 1360 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1361 if (phdr == NULL) { 1362 return (NULL); 1363 } 1364 p4 = (struct sctp_ipv4addr_param *)phdr; 1365 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 1366 /* look it up */ 1367 retval = sctp_findassociation_ep_addr(inp_p, 1368 (struct sockaddr *)&sin4, netp, dest, NULL); 1369 if (retval != NULL) { 1370 return (retval); 1371 } 1372 } else if (ptype == SCTP_IPV6_ADDRESS && 1373 plen == sizeof(struct sctp_ipv6addr_param)) { 1374 /* Get the rest of the address */ 1375 struct sctp_ipv6addr_param ip6_parm, *p6; 1376 1377 phdr = sctp_get_next_param(m, offset, 1378 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 1379 if (phdr == NULL) { 1380 return (NULL); 1381 } 1382 p6 = (struct sctp_ipv6addr_param *)phdr; 1383 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 1384 /* look it up */ 1385 retval = sctp_findassociation_ep_addr(inp_p, 1386 (struct sockaddr *)&sin6, netp, dest, NULL); 1387 if (retval != NULL) { 1388 return (retval); 1389 } 1390 } 1391 offset += SCTP_SIZE32(plen); 1392 phdr = sctp_get_next_param(m, offset, &parm_buf, 1393 sizeof(parm_buf)); 1394 } 1395 return (NULL); 1396} 1397 1398 1399static struct sctp_tcb * 1400sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag, 1401 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 1402 uint16_t lport, int skip_src_check) 1403{ 1404 /* 1405 * Use my vtag to hash. If we find it we then verify the source addr 1406 * is in the assoc. If all goes well we save a bit on rec of a 1407 * packet. 1408 */ 1409 struct sctpasochead *head; 1410 struct sctp_nets *net; 1411 struct sctp_tcb *stcb; 1412 1413 *netp = NULL; 1414 *inp_p = NULL; 1415 SCTP_INP_INFO_RLOCK(); 1416 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag, 1417 sctppcbinfo.hashasocmark)]; 1418 if (head == NULL) { 1419 /* invalid vtag */ 1420 SCTP_INP_INFO_RUNLOCK(); 1421 return (NULL); 1422 } 1423 LIST_FOREACH(stcb, head, sctp_asocs) { 1424 SCTP_INP_RLOCK(stcb->sctp_ep); 1425 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1426 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1427 continue; 1428 } 1429 SCTP_TCB_LOCK(stcb); 1430 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1431 if (stcb->asoc.my_vtag == vtag) { 1432 /* candidate */ 1433 if (stcb->rport != rport) { 1434 /* 1435 * we could remove this if vtags are unique 1436 * across the system. 1437 */ 1438 SCTP_TCB_UNLOCK(stcb); 1439 continue; 1440 } 1441 if (stcb->sctp_ep->sctp_lport != lport) { 1442 /* 1443 * we could remove this if vtags are unique 1444 * across the system. 1445 */ 1446 SCTP_TCB_UNLOCK(stcb); 1447 continue; 1448 } 1449 if (skip_src_check) { 1450 *netp = NULL; /* unknown */ 1451 if (inp_p) 1452 *inp_p = stcb->sctp_ep; 1453 SCTP_INP_INFO_RUNLOCK(); 1454 return (stcb); 1455 } 1456 net = sctp_findnet(stcb, from); 1457 if (net) { 1458 /* yep its him. */ 1459 *netp = net; 1460 SCTP_STAT_INCR(sctps_vtagexpress); 1461 *inp_p = stcb->sctp_ep; 1462 SCTP_INP_INFO_RUNLOCK(); 1463 return (stcb); 1464 } else { 1465 /* 1466 * not him, this should only happen in rare 1467 * cases so I peg it. 1468 */ 1469 SCTP_STAT_INCR(sctps_vtagbogus); 1470 } 1471 } 1472 SCTP_TCB_UNLOCK(stcb); 1473 } 1474 SCTP_INP_INFO_RUNLOCK(); 1475 return (NULL); 1476} 1477 1478/* 1479 * Find an association with the pointer to the inbound IP packet. This can be 1480 * a IPv4 or IPv6 packet. 1481 */ 1482struct sctp_tcb * 1483sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 1484 struct sctphdr *sh, struct sctp_chunkhdr *ch, 1485 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 1486{ 1487 int find_tcp_pool; 1488 struct ip *iph; 1489 struct sctp_tcb *retval; 1490 struct sockaddr_storage to_store, from_store; 1491 struct sockaddr *to = (struct sockaddr *)&to_store; 1492 struct sockaddr *from = (struct sockaddr *)&from_store; 1493 struct sctp_inpcb *inp; 1494 1495 iph = mtod(m, struct ip *); 1496 if (iph->ip_v == IPVERSION) { 1497 /* its IPv4 */ 1498 struct sockaddr_in *from4; 1499 1500 from4 = (struct sockaddr_in *)&from_store; 1501 bzero(from4, sizeof(*from4)); 1502 from4->sin_family = AF_INET; 1503 from4->sin_len = sizeof(struct sockaddr_in); 1504 from4->sin_addr.s_addr = iph->ip_src.s_addr; 1505 from4->sin_port = sh->src_port; 1506 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1507 /* its IPv6 */ 1508 struct ip6_hdr *ip6; 1509 struct sockaddr_in6 *from6; 1510 1511 ip6 = mtod(m, struct ip6_hdr *); 1512 from6 = (struct sockaddr_in6 *)&from_store; 1513 bzero(from6, sizeof(*from6)); 1514 from6->sin6_family = AF_INET6; 1515 from6->sin6_len = sizeof(struct sockaddr_in6); 1516 from6->sin6_addr = ip6->ip6_src; 1517 from6->sin6_port = sh->src_port; 1518 /* Get the scopes in properly to the sin6 addr's */ 1519 /* we probably don't need these operations */ 1520 (void)sa6_recoverscope(from6); 1521 sa6_embedscope(from6, ip6_use_defzone); 1522 } else { 1523 /* Currently not supported. */ 1524 return (NULL); 1525 } 1526 if (sh->v_tag) { 1527 /* we only go down this path if vtag is non-zero */ 1528 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag), 1529 inp_p, netp, sh->src_port, sh->dest_port, 0); 1530 if (retval) { 1531 return (retval); 1532 } 1533 } 1534 if (iph->ip_v == IPVERSION) { 1535 /* its IPv4 */ 1536 struct sockaddr_in *to4; 1537 1538 to4 = (struct sockaddr_in *)&to_store; 1539 bzero(to4, sizeof(*to4)); 1540 to4->sin_family = AF_INET; 1541 to4->sin_len = sizeof(struct sockaddr_in); 1542 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 1543 to4->sin_port = sh->dest_port; 1544 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1545 /* its IPv6 */ 1546 struct ip6_hdr *ip6; 1547 struct sockaddr_in6 *to6; 1548 1549 ip6 = mtod(m, struct ip6_hdr *); 1550 to6 = (struct sockaddr_in6 *)&to_store; 1551 bzero(to6, sizeof(*to6)); 1552 to6->sin6_family = AF_INET6; 1553 to6->sin6_len = sizeof(struct sockaddr_in6); 1554 to6->sin6_addr = ip6->ip6_dst; 1555 to6->sin6_port = sh->dest_port; 1556 /* Get the scopes in properly to the sin6 addr's */ 1557 /* we probably don't need these operations */ 1558 (void)sa6_recoverscope(to6); 1559 sa6_embedscope(to6, ip6_use_defzone); 1560 } 1561 find_tcp_pool = 0; 1562 if ((ch->chunk_type != SCTP_INITIATION) && 1563 (ch->chunk_type != SCTP_INITIATION_ACK) && 1564 (ch->chunk_type != SCTP_COOKIE_ACK) && 1565 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 1566 /* Other chunk types go to the tcp pool. */ 1567 find_tcp_pool = 1; 1568 } 1569 if (inp_p) { 1570 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 1571 find_tcp_pool, vrf_id); 1572 inp = *inp_p; 1573 } else { 1574 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 1575 find_tcp_pool, vrf_id); 1576 } 1577 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 1578 if (retval == NULL && inp) { 1579 /* Found a EP but not this address */ 1580 if ((ch->chunk_type == SCTP_INITIATION) || 1581 (ch->chunk_type == SCTP_INITIATION_ACK)) { 1582 /*- 1583 * special hook, we do NOT return linp or an 1584 * association that is linked to an existing 1585 * association that is under the TCP pool (i.e. no 1586 * listener exists). The endpoint finding routine 1587 * will always find a listner before examining the 1588 * TCP pool. 1589 */ 1590 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 1591 if (inp_p) { 1592 *inp_p = NULL; 1593 } 1594 return (NULL); 1595 } 1596 retval = sctp_findassociation_special_addr(m, iphlen, 1597 offset, sh, &inp, netp, to); 1598 if (inp_p != NULL) { 1599 *inp_p = inp; 1600 } 1601 } 1602 } 1603 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 1604 return (retval); 1605} 1606 1607/* 1608 * lookup an association by an ASCONF lookup address. 1609 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 1610 */ 1611struct sctp_tcb * 1612sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 1613 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp) 1614{ 1615 struct sctp_tcb *stcb; 1616 struct sockaddr_in *sin; 1617 struct sockaddr_in6 *sin6; 1618 struct sockaddr_storage local_store, remote_store; 1619 struct ip *iph; 1620 struct sctp_paramhdr parm_buf, *phdr; 1621 int ptype; 1622 int zero_address = 0; 1623 1624 1625 memset(&local_store, 0, sizeof(local_store)); 1626 memset(&remote_store, 0, sizeof(remote_store)); 1627 1628 /* First get the destination address setup too. */ 1629 iph = mtod(m, struct ip *); 1630 if (iph->ip_v == IPVERSION) { 1631 /* its IPv4 */ 1632 sin = (struct sockaddr_in *)&local_store; 1633 sin->sin_family = AF_INET; 1634 sin->sin_len = sizeof(*sin); 1635 sin->sin_port = sh->dest_port; 1636 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 1637 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1638 /* its IPv6 */ 1639 struct ip6_hdr *ip6; 1640 1641 ip6 = mtod(m, struct ip6_hdr *); 1642 sin6 = (struct sockaddr_in6 *)&local_store; 1643 sin6->sin6_family = AF_INET6; 1644 sin6->sin6_len = sizeof(*sin6); 1645 sin6->sin6_port = sh->dest_port; 1646 sin6->sin6_addr = ip6->ip6_dst; 1647 } else { 1648 return NULL; 1649 } 1650 1651 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 1652 &parm_buf, sizeof(struct sctp_paramhdr)); 1653 if (phdr == NULL) { 1654 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 1655 __FUNCTION__); 1656 return NULL; 1657 } 1658 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 1659 /* get the correlation address */ 1660 if (ptype == SCTP_IPV6_ADDRESS) { 1661 /* ipv6 address param */ 1662 struct sctp_ipv6addr_param *p6, p6_buf; 1663 1664 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 1665 return NULL; 1666 } 1667 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 1668 offset + sizeof(struct sctp_asconf_chunk), 1669 &p6_buf.ph, sizeof(*p6)); 1670 if (p6 == NULL) { 1671 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 1672 __FUNCTION__); 1673 return (NULL); 1674 } 1675 sin6 = (struct sockaddr_in6 *)&remote_store; 1676 sin6->sin6_family = AF_INET6; 1677 sin6->sin6_len = sizeof(*sin6); 1678 sin6->sin6_port = sh->src_port; 1679 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 1680 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 1681 zero_address = 1; 1682 } else if (ptype == SCTP_IPV4_ADDRESS) { 1683 /* ipv4 address param */ 1684 struct sctp_ipv4addr_param *p4, p4_buf; 1685 1686 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 1687 return NULL; 1688 } 1689 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 1690 offset + sizeof(struct sctp_asconf_chunk), 1691 &p4_buf.ph, sizeof(*p4)); 1692 if (p4 == NULL) { 1693 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 1694 __FUNCTION__); 1695 return (NULL); 1696 } 1697 sin = (struct sockaddr_in *)&remote_store; 1698 sin->sin_family = AF_INET; 1699 sin->sin_len = sizeof(*sin); 1700 sin->sin_port = sh->src_port; 1701 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 1702 if (sin->sin_addr.s_addr == INADDR_ANY) 1703 zero_address = 1; 1704 } else { 1705 /* invalid address param type */ 1706 return NULL; 1707 } 1708 1709 if (zero_address) { 1710 stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p, 1711 netp, sh->src_port, sh->dest_port, 1); 1712 /* 1713 * printf("findassociation_ep_asconf: zero lookup address 1714 * finds stcb 0x%x\n", (uint32_t)stcb); 1715 */ 1716 } else { 1717 stcb = sctp_findassociation_ep_addr(inp_p, 1718 (struct sockaddr *)&remote_store, netp, 1719 (struct sockaddr *)&local_store, NULL); 1720 } 1721 return (stcb); 1722} 1723 1724 1725/* 1726 * allocate a sctp_inpcb and setup a temporary binding to a port/all 1727 * addresses. This way if we don't get a bind we by default pick a ephemeral 1728 * port with all addresses bound. 1729 */ 1730int 1731sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 1732{ 1733 /* 1734 * we get called when a new endpoint starts up. We need to allocate 1735 * the sctp_inpcb structure from the zone and init it. Mark it as 1736 * unbound and find a port that we can use as an ephemeral with 1737 * INADDR_ANY. If the user binds later no problem we can then add in 1738 * the specific addresses. And setup the default parameters for the 1739 * EP. 1740 */ 1741 int i, error; 1742 struct sctp_inpcb *inp; 1743 struct sctp_pcb *m; 1744 struct timeval time; 1745 sctp_sharedkey_t *null_key; 1746 1747 error = 0; 1748 1749 SCTP_INP_INFO_WLOCK(); 1750 inp = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep, struct sctp_inpcb); 1751 if (inp == NULL) { 1752 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 1753 SCTP_INP_INFO_WUNLOCK(); 1754 return (ENOBUFS); 1755 } 1756 /* zap it */ 1757 bzero(inp, sizeof(*inp)); 1758 1759 /* bump generations */ 1760 /* setup socket pointers */ 1761 inp->sctp_socket = so; 1762 inp->ip_inp.inp.inp_socket = so; 1763 1764 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 1765 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 1766 1767#ifdef IPSEC 1768 { 1769 struct inpcbpolicy *pcb_sp = NULL; 1770 1771 error = ipsec_init_pcbpolicy(so, &pcb_sp); 1772 /* Arrange to share the policy */ 1773 inp->ip_inp.inp.inp_sp = pcb_sp; 1774 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 1775 } 1776 if (error != 0) { 1777 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1778 SCTP_INP_INFO_WUNLOCK(); 1779 return error; 1780 } 1781#endif /* IPSEC */ 1782 SCTP_INCR_EP_COUNT(); 1783 inp->ip_inp.inp.inp_ip_ttl = ip_defttl; 1784 SCTP_INP_INFO_WUNLOCK(); 1785 1786 so->so_pcb = (caddr_t)inp; 1787 1788 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 1789 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 1790 /* UDP style socket */ 1791 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 1792 SCTP_PCB_FLAGS_UNBOUND); 1793 /* Be sure it is NON-BLOCKING IO for UDP */ 1794 /* SCTP_SET_SO_NBIO(so); */ 1795 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 1796 /* TCP style socket */ 1797 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 1798 SCTP_PCB_FLAGS_UNBOUND); 1799 /* Be sure we have blocking IO by default */ 1800 SCTP_CLEAR_SO_NBIO(so); 1801 } else { 1802 /* 1803 * unsupported socket type (RAW, etc)- in case we missed it 1804 * in protosw 1805 */ 1806 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1807 return (EOPNOTSUPP); 1808 } 1809 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 1810 1811 inp->sctp_tcbhash = SCTP_HASH_INIT(sctp_pcbtblsize, 1812 &inp->sctp_hashmark); 1813 if (inp->sctp_tcbhash == NULL) { 1814 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 1815 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1816 return (ENOBUFS); 1817 } 1818 inp->def_vrf_id = vrf_id; 1819 1820 SCTP_INP_INFO_WLOCK(); 1821 SCTP_INP_LOCK_INIT(inp); 1822 SCTP_INP_READ_INIT(inp); 1823 SCTP_ASOC_CREATE_LOCK_INIT(inp); 1824 /* lock the new ep */ 1825 SCTP_INP_WLOCK(inp); 1826 1827 /* add it to the info area */ 1828 LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list); 1829 SCTP_INP_INFO_WUNLOCK(); 1830 1831 TAILQ_INIT(&inp->read_queue); 1832 LIST_INIT(&inp->sctp_addr_list); 1833 1834 LIST_INIT(&inp->sctp_asoc_list); 1835 1836#ifdef SCTP_TRACK_FREED_ASOCS 1837 /* TEMP CODE */ 1838 LIST_INIT(&inp->sctp_asoc_free_list); 1839#endif 1840 /* Init the timer structure for signature change */ 1841 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 1842 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 1843 1844 /* now init the actual endpoint default data */ 1845 m = &inp->sctp_ep; 1846 1847 /* setup the base timeout information */ 1848 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 1849 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 1850 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default); 1851 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default); 1852 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default); 1853 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default); 1854 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default); 1855 /* all max/min max are in ms */ 1856 m->sctp_maxrto = sctp_rto_max_default; 1857 m->sctp_minrto = sctp_rto_min_default; 1858 m->initial_rto = sctp_rto_initial_default; 1859 m->initial_init_rto_max = sctp_init_rto_max_default; 1860 m->sctp_sack_freq = sctp_sack_freq_default; 1861 1862 m->max_open_streams_intome = MAX_SCTP_STREAMS; 1863 1864 m->max_init_times = sctp_init_rtx_max_default; 1865 m->max_send_times = sctp_assoc_rtx_max_default; 1866 m->def_net_failure = sctp_path_rtx_max_default; 1867 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 1868 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 1869 m->max_burst = sctp_max_burst_default; 1870 /* number of streams to pre-open on a association */ 1871 m->pre_open_stream_count = sctp_nr_outgoing_streams_default; 1872 1873 /* Add adaptation cookie */ 1874 m->adaptation_layer_indicator = 0x504C5253; 1875 1876 /* seed random number generator */ 1877 m->random_counter = 1; 1878 m->store_at = SCTP_SIGNATURE_SIZE; 1879 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 1880 sctp_fill_random_store(m); 1881 1882 /* Minimum cookie size */ 1883 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 1884 sizeof(struct sctp_state_cookie); 1885 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 1886 1887 /* Setup the initial secret */ 1888 (void)SCTP_GETTIME_TIMEVAL(&time); 1889 m->time_of_secret_change = time.tv_sec; 1890 1891 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 1892 m->secret_key[0][i] = sctp_select_initial_TSN(m); 1893 } 1894 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 1895 1896 /* How long is a cookie good for ? */ 1897 m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default); 1898 /* 1899 * Initialize authentication parameters 1900 */ 1901 m->local_hmacs = sctp_default_supported_hmaclist(); 1902 m->local_auth_chunks = sctp_alloc_chunklist(); 1903 sctp_auth_set_default_chunks(m->local_auth_chunks); 1904 LIST_INIT(&m->shared_keys); 1905 /* add default NULL key as key id 0 */ 1906 null_key = sctp_alloc_sharedkey(); 1907 sctp_insert_sharedkey(&m->shared_keys, null_key); 1908 SCTP_INP_WUNLOCK(inp); 1909#ifdef SCTP_LOG_CLOSING 1910 sctp_log_closing(inp, NULL, 12); 1911#endif 1912 return (error); 1913} 1914 1915 1916void 1917sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 1918 struct sctp_tcb *stcb) 1919{ 1920 struct sctp_nets *net; 1921 uint16_t lport, rport; 1922 struct sctppcbhead *head; 1923 struct sctp_laddr *laddr, *oladdr; 1924 1925 SCTP_TCB_UNLOCK(stcb); 1926 SCTP_INP_INFO_WLOCK(); 1927 SCTP_INP_WLOCK(old_inp); 1928 SCTP_INP_WLOCK(new_inp); 1929 SCTP_TCB_LOCK(stcb); 1930 1931 new_inp->sctp_ep.time_of_secret_change = 1932 old_inp->sctp_ep.time_of_secret_change; 1933 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 1934 sizeof(old_inp->sctp_ep.secret_key)); 1935 new_inp->sctp_ep.current_secret_number = 1936 old_inp->sctp_ep.current_secret_number; 1937 new_inp->sctp_ep.last_secret_number = 1938 old_inp->sctp_ep.last_secret_number; 1939 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 1940 1941 /* make it so new data pours into the new socket */ 1942 stcb->sctp_socket = new_inp->sctp_socket; 1943 stcb->sctp_ep = new_inp; 1944 1945 /* Copy the port across */ 1946 lport = new_inp->sctp_lport = old_inp->sctp_lport; 1947 rport = stcb->rport; 1948 /* Pull the tcb from the old association */ 1949 LIST_REMOVE(stcb, sctp_tcbhash); 1950 LIST_REMOVE(stcb, sctp_tcblist); 1951 1952 /* Now insert the new_inp into the TCP connected hash */ 1953 head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport), 1954 sctppcbinfo.hashtcpmark)]; 1955 1956 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 1957 /* Its safe to access */ 1958 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 1959 1960 /* Now move the tcb into the endpoint list */ 1961 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 1962 /* 1963 * Question, do we even need to worry about the ep-hash since we 1964 * only have one connection? Probably not :> so lets get rid of it 1965 * and not suck up any kernel memory in that. 1966 */ 1967 1968 /* Ok. Let's restart timer. */ 1969 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1970 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 1971 stcb, net); 1972 } 1973 1974 SCTP_INP_INFO_WUNLOCK(); 1975 if (new_inp->sctp_tcbhash != NULL) { 1976 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 1977 new_inp->sctp_tcbhash = NULL; 1978 } 1979 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1980 /* Subset bound, so copy in the laddr list from the old_inp */ 1981 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 1982 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 1983 if (laddr == NULL) { 1984 /* 1985 * Gak, what can we do? This assoc is really 1986 * HOSED. We probably should send an abort 1987 * here. 1988 */ 1989 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 1990 continue; 1991 } 1992 SCTP_INCR_LADDR_COUNT(); 1993 bzero(laddr, sizeof(*laddr)); 1994 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 1995 laddr->ifa = oladdr->ifa; 1996 atomic_add_int(&laddr->ifa->refcount, 1); 1997 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 1998 sctp_nxt_addr); 1999 new_inp->laddr_count++; 2000 } 2001 } 2002 /* 2003 * Now any running timers need to be adjusted since we really don't 2004 * care if they are running or not just blast in the new_inp into 2005 * all of them. 2006 */ 2007 2008 stcb->asoc.hb_timer.ep = (void *)new_inp; 2009 stcb->asoc.dack_timer.ep = (void *)new_inp; 2010 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2011 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2012 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2013 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2014 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2015 /* now what about the nets? */ 2016 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2017 net->pmtu_timer.ep = (void *)new_inp; 2018 net->rxt_timer.ep = (void *)new_inp; 2019 net->fr_timer.ep = (void *)new_inp; 2020 } 2021 SCTP_INP_WUNLOCK(new_inp); 2022 SCTP_INP_WUNLOCK(old_inp); 2023} 2024 2025static int 2026sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 2027{ 2028 struct sctppcbhead *head; 2029 struct sctp_inpcb *t_inp; 2030 int fnd; 2031 2032 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 2033 sctppcbinfo.hashmark)]; 2034 LIST_FOREACH(t_inp, head, sctp_hash) { 2035 if (t_inp->sctp_lport != lport) { 2036 continue; 2037 } 2038 /* is it in the VRF in question */ 2039 fnd = 0; 2040 if (t_inp->def_vrf_id == vrf_id) 2041 fnd = 1; 2042 if (!fnd) 2043 continue; 2044 2045 /* This one is in use. */ 2046 /* check the v6/v4 binding issue */ 2047 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2048 SCTP_IPV6_V6ONLY(t_inp)) { 2049 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2050 /* collision in V6 space */ 2051 return (1); 2052 } else { 2053 /* inp is BOUND_V4 no conflict */ 2054 continue; 2055 } 2056 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2057 /* t_inp is bound v4 and v6, conflict always */ 2058 return (1); 2059 } else { 2060 /* t_inp is bound only V4 */ 2061 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2062 SCTP_IPV6_V6ONLY(inp)) { 2063 /* no conflict */ 2064 continue; 2065 } 2066 /* else fall through to conflict */ 2067 } 2068 return (1); 2069 } 2070 return (0); 2071} 2072 2073 2074 2075int 2076sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 2077{ 2078 /* bind a ep to a socket address */ 2079 struct sctppcbhead *head; 2080 struct sctp_inpcb *inp, *inp_tmp; 2081 struct inpcb *ip_inp; 2082 int bindall; 2083 uint16_t lport; 2084 int error; 2085 uint32_t vrf_id; 2086 2087 lport = 0; 2088 error = 0; 2089 bindall = 1; 2090 inp = (struct sctp_inpcb *)so->so_pcb; 2091 ip_inp = (struct inpcb *)so->so_pcb; 2092#ifdef SCTP_DEBUG 2093 if (addr) { 2094 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2095 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2096 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2097 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2098 } 2099#endif 2100 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2101 /* already did a bind, subsequent binds NOT allowed ! */ 2102 return (EINVAL); 2103 } 2104 if (addr != NULL) { 2105 if (addr->sa_family == AF_INET) { 2106 struct sockaddr_in *sin; 2107 2108 /* IPV6_V6ONLY socket? */ 2109 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2110 return (EINVAL); 2111 } 2112 if (addr->sa_len != sizeof(*sin)) 2113 return (EINVAL); 2114 2115 sin = (struct sockaddr_in *)addr; 2116 lport = sin->sin_port; 2117 2118 if (sin->sin_addr.s_addr != INADDR_ANY) { 2119 bindall = 0; 2120 } 2121 } else if (addr->sa_family == AF_INET6) { 2122 /* Only for pure IPv6 Address. (No IPv4 Mapped!) */ 2123 struct sockaddr_in6 *sin6; 2124 2125 sin6 = (struct sockaddr_in6 *)addr; 2126 2127 if (addr->sa_len != sizeof(*sin6)) 2128 return (EINVAL); 2129 2130 lport = sin6->sin6_port; 2131 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2132 bindall = 0; 2133 /* KAME hack: embed scopeid */ 2134 if (sa6_embedscope(sin6, ip6_use_defzone) != 0) 2135 return (EINVAL); 2136 } 2137 /* this must be cleared for ifa_ifwithaddr() */ 2138 sin6->sin6_scope_id = 0; 2139 } else { 2140 return (EAFNOSUPPORT); 2141 } 2142 } 2143 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2144 vrf_id = inp->def_vrf_id; 2145 2146 SCTP_INP_INFO_WLOCK(); 2147 SCTP_INP_WLOCK(inp); 2148 /* increase our count due to the unlock we do */ 2149 SCTP_INP_INCR_REF(inp); 2150 if (lport) { 2151 /* 2152 * Did the caller specify a port? if so we must see if a ep 2153 * already has this one bound. 2154 */ 2155 /* got to be root to get at low ports */ 2156 if (ntohs(lport) < IPPORT_RESERVED) { 2157 if (p && (error = 2158 priv_check_cred(p->td_ucred, 2159 PRIV_NETINET_RESERVEDPORT, 2160 SUSER_ALLOWJAIL 2161 ) 2162 )) { 2163 SCTP_INP_DECR_REF(inp); 2164 SCTP_INP_WUNLOCK(inp); 2165 SCTP_INP_INFO_WUNLOCK(); 2166 return (error); 2167 } 2168 } 2169 if (p == NULL) { 2170 SCTP_INP_DECR_REF(inp); 2171 SCTP_INP_WUNLOCK(inp); 2172 SCTP_INP_INFO_WUNLOCK(); 2173 return (error); 2174 } 2175 SCTP_INP_WUNLOCK(inp); 2176 if (bindall) { 2177 vrf_id = inp->def_vrf_id; 2178 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2179 if (inp_tmp != NULL) { 2180 /* 2181 * lock guy returned and lower count note 2182 * that we are not bound so inp_tmp should 2183 * NEVER be inp. And it is this inp 2184 * (inp_tmp) that gets the reference bump, 2185 * so we must lower it. 2186 */ 2187 SCTP_INP_DECR_REF(inp_tmp); 2188 SCTP_INP_DECR_REF(inp); 2189 /* unlock info */ 2190 SCTP_INP_INFO_WUNLOCK(); 2191 return (EADDRINUSE); 2192 } 2193 } else { 2194 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2195 if (inp_tmp != NULL) { 2196 /* 2197 * lock guy returned and lower count note 2198 * that we are not bound so inp_tmp should 2199 * NEVER be inp. And it is this inp 2200 * (inp_tmp) that gets the reference bump, 2201 * so we must lower it. 2202 */ 2203 SCTP_INP_DECR_REF(inp_tmp); 2204 SCTP_INP_DECR_REF(inp); 2205 /* unlock info */ 2206 SCTP_INP_INFO_WUNLOCK(); 2207 return (EADDRINUSE); 2208 } 2209 } 2210 SCTP_INP_WLOCK(inp); 2211 if (bindall) { 2212 /* verify that no lport is not used by a singleton */ 2213 if (sctp_isport_inuse(inp, lport, vrf_id)) { 2214 /* Sorry someone already has this one bound */ 2215 SCTP_INP_DECR_REF(inp); 2216 SCTP_INP_WUNLOCK(inp); 2217 SCTP_INP_INFO_WUNLOCK(); 2218 return (EADDRINUSE); 2219 } 2220 } 2221 } else { 2222 uint16_t first, last, candiate; 2223 uint16_t count; 2224 int done; 2225 2226 if (ip_inp->inp_flags & INP_HIGHPORT) { 2227 first = ipport_hifirstauto; 2228 last = ipport_hilastauto; 2229 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2230 if (p && (error = 2231 priv_check_cred(p->td_ucred, 2232 PRIV_NETINET_RESERVEDPORT, 2233 SUSER_ALLOWJAIL 2234 ) 2235 )) { 2236 SCTP_INP_DECR_REF(inp); 2237 SCTP_INP_WUNLOCK(inp); 2238 SCTP_INP_INFO_WUNLOCK(); 2239 return (error); 2240 } 2241 first = ipport_lowfirstauto; 2242 last = ipport_lowlastauto; 2243 } else { 2244 first = ipport_firstauto; 2245 last = ipport_lastauto; 2246 } 2247 if (first > last) { 2248 uint16_t temp; 2249 2250 temp = first; 2251 first = last; 2252 last = temp; 2253 } 2254 count = last - first + 1; /* number of candidates */ 2255 candiate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2256 2257 done = 0; 2258 while (!done) { 2259 if (sctp_isport_inuse(inp, htons(candiate), inp->def_vrf_id) == 0) { 2260 done = 1; 2261 } 2262 if (!done) { 2263 if (--count == 0) { 2264 SCTP_INP_DECR_REF(inp); 2265 SCTP_INP_WUNLOCK(inp); 2266 SCTP_INP_INFO_WUNLOCK(); 2267 return (EADDRINUSE); 2268 } 2269 if (candiate == last) 2270 candiate = first; 2271 else 2272 candiate = candiate + 1; 2273 } 2274 } 2275 lport = htons(candiate); 2276 } 2277 SCTP_INP_DECR_REF(inp); 2278 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2279 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2280 /* 2281 * this really should not happen. The guy did a non-blocking 2282 * bind and then did a close at the same time. 2283 */ 2284 SCTP_INP_WUNLOCK(inp); 2285 SCTP_INP_INFO_WUNLOCK(); 2286 return (EINVAL); 2287 } 2288 /* ok we look clear to give out this port, so lets setup the binding */ 2289 if (bindall) { 2290 /* binding to all addresses, so just set in the proper flags */ 2291 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2292 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2293 /* set the automatic addr changes from kernel flag */ 2294 if (sctp_auto_asconf == 0) { 2295 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2296 } else { 2297 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2298 } 2299 } else { 2300 /* 2301 * bind specific, make sure flags is off and add a new 2302 * address structure to the sctp_addr_list inside the ep 2303 * structure. 2304 * 2305 * We will need to allocate one and insert it at the head. The 2306 * socketopt call can just insert new addresses in there as 2307 * well. It will also have to do the embed scope kame hack 2308 * too (before adding). 2309 */ 2310 struct sctp_ifa *ifa; 2311 struct sockaddr_storage store_sa; 2312 2313 memset(&store_sa, 0, sizeof(store_sa)); 2314 if (addr->sa_family == AF_INET) { 2315 struct sockaddr_in *sin; 2316 2317 sin = (struct sockaddr_in *)&store_sa; 2318 memcpy(sin, addr, sizeof(struct sockaddr_in)); 2319 sin->sin_port = 0; 2320 } else if (addr->sa_family == AF_INET6) { 2321 struct sockaddr_in6 *sin6; 2322 2323 sin6 = (struct sockaddr_in6 *)&store_sa; 2324 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 2325 sin6->sin6_port = 0; 2326 } 2327 /* 2328 * first find the interface with the bound address need to 2329 * zero out the port to find the address! yuck! can't do 2330 * this earlier since need port for sctp_pcb_findep() 2331 */ 2332 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 2333 vrf_id, 0); 2334 if (ifa == NULL) { 2335 /* Can't find an interface with that address */ 2336 SCTP_INP_WUNLOCK(inp); 2337 SCTP_INP_INFO_WUNLOCK(); 2338 return (EADDRNOTAVAIL); 2339 } 2340 if (addr->sa_family == AF_INET6) { 2341 /* GAK, more FIXME IFA lock? */ 2342 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2343 /* Can't bind a non-existent addr. */ 2344 SCTP_INP_WUNLOCK(inp); 2345 SCTP_INP_INFO_WUNLOCK(); 2346 return (EINVAL); 2347 } 2348 } 2349 /* we're not bound all */ 2350 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 2351 /* allow bindx() to send ASCONF's for binding changes */ 2352 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2353 /* set the automatic addr changes from kernel flag */ 2354 if (sctp_auto_asconf == 0) { 2355 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2356 } else { 2357 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2358 } 2359 2360 /* add this address to the endpoint list */ 2361 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 2362 if (error != 0) { 2363 SCTP_INP_WUNLOCK(inp); 2364 SCTP_INP_INFO_WUNLOCK(); 2365 return (error); 2366 } 2367 inp->laddr_count++; 2368 } 2369 /* find the bucket */ 2370 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 2371 sctppcbinfo.hashmark)]; 2372 /* put it in the bucket */ 2373 LIST_INSERT_HEAD(head, inp, sctp_hash); 2374 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n", 2375 head, ntohs(lport)); 2376 /* set in the port */ 2377 inp->sctp_lport = lport; 2378 2379 /* turn off just the unbound flag */ 2380 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2381 SCTP_INP_WUNLOCK(inp); 2382 SCTP_INP_INFO_WUNLOCK(); 2383 return (0); 2384} 2385 2386 2387static void 2388sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next) 2389{ 2390 struct sctp_iterator *it; 2391 2392 /* 2393 * We enter with the only the ITERATOR_LOCK in place and a write 2394 * lock on the inp_info stuff. 2395 */ 2396 2397 /* 2398 * Go through all iterators, we must do this since it is possible 2399 * that some iterator does NOT have the lock, but is waiting for it. 2400 * And the one that had the lock has either moved in the last 2401 * iteration or we just cleared it above. We need to find all of 2402 * those guys. The list of iterators should never be very big 2403 * though. 2404 */ 2405 TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) { 2406 if (it == inp->inp_starting_point_for_iterator) 2407 /* skip this guy, he's special */ 2408 continue; 2409 if (it->inp == inp) { 2410 /* 2411 * This is tricky and we DON'T lock the iterator. 2412 * Reason is he's running but waiting for me since 2413 * inp->inp_starting_point_for_iterator has the lock 2414 * on me (the guy above we skipped). This tells us 2415 * its is not running but waiting for 2416 * inp->inp_starting_point_for_iterator to be 2417 * released by the guy that does have our INP in a 2418 * lock. 2419 */ 2420 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 2421 it->inp = NULL; 2422 it->stcb = NULL; 2423 } else { 2424 /* set him up to do the next guy not me */ 2425 it->inp = inp_next; 2426 it->stcb = NULL; 2427 } 2428 } 2429 } 2430 it = inp->inp_starting_point_for_iterator; 2431 if (it) { 2432 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 2433 it->inp = NULL; 2434 } else { 2435 it->inp = inp_next; 2436 } 2437 it->stcb = NULL; 2438 } 2439} 2440 2441/* release sctp_inpcb unbind the port */ 2442void 2443sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 2444{ 2445 /* 2446 * Here we free a endpoint. We must find it (if it is in the Hash 2447 * table) and remove it from there. Then we must also find it in the 2448 * overall list and remove it from there. After all removals are 2449 * complete then any timer has to be stopped. Then start the actual 2450 * freeing. a) Any local lists. b) Any associations. c) The hash of 2451 * all associations. d) finally the ep itself. 2452 */ 2453 struct sctp_pcb *m; 2454 struct sctp_inpcb *inp_save; 2455 struct sctp_tcb *asoc, *nasoc; 2456 struct sctp_laddr *laddr, *nladdr; 2457 struct inpcb *ip_pcb; 2458 struct socket *so; 2459 2460 struct sctp_queued_to_read *sq; 2461 2462 2463 int cnt; 2464 sctp_sharedkey_t *shared_key; 2465 2466 2467#ifdef SCTP_LOG_CLOSING 2468 sctp_log_closing(inp, NULL, 0); 2469#endif 2470 2471 SCTP_ITERATOR_LOCK(); 2472 so = inp->sctp_socket; 2473 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2474 /* been here before.. eeks.. get out of here */ 2475 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 2476 SCTP_ITERATOR_UNLOCK(); 2477#ifdef SCTP_LOG_CLOSING 2478 sctp_log_closing(inp, NULL, 1); 2479#endif 2480 return; 2481 } 2482 SCTP_ASOC_CREATE_LOCK(inp); 2483 SCTP_INP_INFO_WLOCK(); 2484 2485 SCTP_INP_WLOCK(inp); 2486 /* First time through we have the socket lock, after that no more. */ 2487 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 2488 /* 2489 * Once we are in we can remove the flag from = 1 is only 2490 * passed from the actual closing routines that are called 2491 * via the sockets layer. 2492 */ 2493 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 2494 } 2495 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 2496 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 2497 2498 if (inp->control) { 2499 sctp_m_freem(inp->control); 2500 inp->control = NULL; 2501 } 2502 if (inp->pkt) { 2503 sctp_m_freem(inp->pkt); 2504 inp->pkt = NULL; 2505 } 2506 m = &inp->sctp_ep; 2507 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 2508 * here but I will be nice :> (i.e. 2509 * ip_pcb = ep;) */ 2510 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 2511 int cnt_in_sd; 2512 2513 cnt_in_sd = 0; 2514 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 2515 asoc = nasoc) { 2516 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2517 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2518 /* Skip guys being freed */ 2519 asoc->sctp_socket = NULL; 2520 cnt_in_sd++; 2521 continue; 2522 } 2523 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 2524 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 2525 /* Just abandon things in the front states */ 2526 if (asoc->asoc.total_output_queue_size == 0) { 2527 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2); 2528 continue; 2529 } 2530 } 2531 SCTP_TCB_LOCK(asoc); 2532 /* Disconnect the socket please */ 2533 asoc->sctp_socket = NULL; 2534 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 2535 if ((asoc->asoc.size_on_reasm_queue > 0) || 2536 (asoc->asoc.control_pdapi) || 2537 (asoc->asoc.size_on_all_streams > 0) || 2538 (so && (so->so_rcv.sb_cc > 0)) 2539 ) { 2540 /* Left with Data unread */ 2541 struct mbuf *op_err; 2542 2543 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2544 0, M_DONTWAIT, 1, MT_DATA); 2545 if (op_err) { 2546 /* Fill in the user initiated abort */ 2547 struct sctp_paramhdr *ph; 2548 uint32_t *ippp; 2549 2550 SCTP_BUF_LEN(op_err) = 2551 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 2552 ph = mtod(op_err, 2553 struct sctp_paramhdr *); 2554 ph->param_type = htons( 2555 SCTP_CAUSE_USER_INITIATED_ABT); 2556 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2557 ippp = (uint32_t *) (ph + 1); 2558 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 2559 } 2560 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 2561 sctp_send_abort_tcb(asoc, op_err); 2562 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2563 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2564 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2565 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2566 } 2567 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4); 2568 continue; 2569 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 2570 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 2571 (asoc->asoc.stream_queue_cnt == 0) 2572 ) { 2573 if (asoc->asoc.locked_on_sending) { 2574 goto abort_anyway; 2575 } 2576 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 2577 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 2578 /* 2579 * there is nothing queued to send, 2580 * so I send shutdown 2581 */ 2582 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 2583 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2584 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2585 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2586 } 2587 asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT; 2588 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 2589 asoc->asoc.primary_destination); 2590 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 2591 asoc->asoc.primary_destination); 2592 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR); 2593 } 2594 } else { 2595 /* mark into shutdown pending */ 2596 struct sctp_stream_queue_pending *sp; 2597 2598 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 2599 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 2600 asoc->asoc.primary_destination); 2601 if (asoc->asoc.locked_on_sending) { 2602 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 2603 sctp_streamhead); 2604 if (sp == NULL) { 2605 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 2606 asoc->asoc.locked_on_sending, 2607 asoc->asoc.locked_on_sending->stream_no); 2608 } else { 2609 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 2610 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 2611 } 2612 } 2613 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 2614 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 2615 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 2616 struct mbuf *op_err; 2617 2618 abort_anyway: 2619 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2620 0, M_DONTWAIT, 1, MT_DATA); 2621 if (op_err) { 2622 /* 2623 * Fill in the user 2624 * initiated abort 2625 */ 2626 struct sctp_paramhdr *ph; 2627 uint32_t *ippp; 2628 2629 SCTP_BUF_LEN(op_err) = 2630 (sizeof(struct sctp_paramhdr) + 2631 sizeof(uint32_t)); 2632 ph = mtod(op_err, 2633 struct sctp_paramhdr *); 2634 ph->param_type = htons( 2635 SCTP_CAUSE_USER_INITIATED_ABT); 2636 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2637 ippp = (uint32_t *) (ph + 1); 2638 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 2639 } 2640 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 2641 sctp_send_abort_tcb(asoc, op_err); 2642 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2643 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2644 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2645 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2646 } 2647 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6); 2648 continue; 2649 } 2650 } 2651 cnt_in_sd++; 2652 SCTP_TCB_UNLOCK(asoc); 2653 } 2654 /* now is there some left in our SHUTDOWN state? */ 2655 if (cnt_in_sd) { 2656 SCTP_INP_WUNLOCK(inp); 2657 SCTP_ASOC_CREATE_UNLOCK(inp); 2658 SCTP_INP_INFO_WUNLOCK(); 2659 SCTP_ITERATOR_UNLOCK(); 2660#ifdef SCTP_LOG_CLOSING 2661 sctp_log_closing(inp, NULL, 2); 2662#endif 2663 return; 2664 } 2665 } 2666 inp->sctp_socket = NULL; 2667 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 2668 SCTP_PCB_FLAGS_UNBOUND) { 2669 /* 2670 * ok, this guy has been bound. It's port is somewhere in 2671 * the sctppcbinfo hash table. Remove it! 2672 */ 2673 LIST_REMOVE(inp, sctp_hash); 2674 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 2675 } 2676 /* 2677 * If there is a timer running to kill us, forget it, since it may 2678 * have a contest on the INP lock.. which would cause us to die ... 2679 */ 2680 cnt = 0; 2681 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 2682 asoc = nasoc) { 2683 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2684 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2685 cnt++; 2686 continue; 2687 } 2688 /* Free associations that are NOT killing us */ 2689 SCTP_TCB_LOCK(asoc); 2690 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 2691 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 2692 struct mbuf *op_err; 2693 uint32_t *ippp; 2694 2695 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2696 0, M_DONTWAIT, 1, MT_DATA); 2697 if (op_err) { 2698 /* Fill in the user initiated abort */ 2699 struct sctp_paramhdr *ph; 2700 2701 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 2702 sizeof(uint32_t)); 2703 ph = mtod(op_err, struct sctp_paramhdr *); 2704 ph->param_type = htons( 2705 SCTP_CAUSE_USER_INITIATED_ABT); 2706 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2707 ippp = (uint32_t *) (ph + 1); 2708 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 2709 2710 } 2711 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 2712 sctp_send_abort_tcb(asoc, op_err); 2713 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2714 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2715 cnt++; 2716 SCTP_TCB_UNLOCK(asoc); 2717 continue; 2718 } 2719 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2720 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2721 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2722 } 2723 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8); 2724 } 2725 if (cnt) { 2726 /* Ok we have someone out there that will kill us */ 2727 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2728 SCTP_INP_WUNLOCK(inp); 2729 SCTP_ASOC_CREATE_UNLOCK(inp); 2730 SCTP_INP_INFO_WUNLOCK(); 2731 SCTP_ITERATOR_UNLOCK(); 2732#ifdef SCTP_LOG_CLOSING 2733 sctp_log_closing(inp, NULL, 3); 2734#endif 2735 return; 2736 } 2737 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 2738 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2739 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 2740 SCTP_INP_WUNLOCK(inp); 2741 SCTP_ASOC_CREATE_UNLOCK(inp); 2742 SCTP_INP_INFO_WUNLOCK(); 2743 SCTP_ITERATOR_UNLOCK(); 2744#ifdef SCTP_LOG_CLOSING 2745 sctp_log_closing(inp, NULL, 4); 2746#endif 2747 return; 2748 } 2749 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2750 inp->sctp_ep.signature_change.type = 0; 2751 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 2752 2753#ifdef SCTP_LOG_CLOSING 2754 sctp_log_closing(inp, NULL, 5); 2755#endif 2756 2757 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2758 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE; 2759 /* Clear the read queue */ 2760 /* sa_ignore FREED_MEMORY */ 2761 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { 2762 /* Its only abandoned if it had data left */ 2763 if (sq->length) 2764 SCTP_STAT_INCR(sctps_left_abandon); 2765 2766 TAILQ_REMOVE(&inp->read_queue, sq, next); 2767 sctp_free_remote_addr(sq->whoFrom); 2768 if (so) 2769 so->so_rcv.sb_cc -= sq->length; 2770 if (sq->data) { 2771 sctp_m_freem(sq->data); 2772 sq->data = NULL; 2773 } 2774 /* 2775 * no need to free the net count, since at this point all 2776 * assoc's are gone. 2777 */ 2778 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); 2779 SCTP_DECR_READQ_COUNT(); 2780 } 2781 /* Now the sctp_pcb things */ 2782 /* 2783 * free each asoc if it is not already closed/free. we can't use the 2784 * macro here since le_next will get freed as part of the 2785 * sctp_free_assoc() call. 2786 */ 2787 cnt = 0; 2788 if (so) { 2789#ifdef IPSEC 2790 ipsec4_delete_pcbpolicy(ip_pcb); 2791#endif /* IPSEC */ 2792 2793 /* Unlocks not needed since the socket is gone now */ 2794 } 2795 if (ip_pcb->inp_options) { 2796 (void)sctp_m_free(ip_pcb->inp_options); 2797 ip_pcb->inp_options = 0; 2798 } 2799 if (ip_pcb->inp_moptions) { 2800 ip_freemoptions(ip_pcb->inp_moptions); 2801 ip_pcb->inp_moptions = 0; 2802 } 2803#ifdef INET6 2804 if (ip_pcb->inp_vflag & INP_IPV6) { 2805 struct in6pcb *in6p; 2806 2807 in6p = (struct in6pcb *)inp; 2808 ip6_freepcbopts(in6p->in6p_outputopts); 2809 } 2810#endif /* INET6 */ 2811 ip_pcb->inp_vflag = 0; 2812 /* free up authentication fields */ 2813 if (inp->sctp_ep.local_auth_chunks != NULL) 2814 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 2815 if (inp->sctp_ep.local_hmacs != NULL) 2816 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 2817 2818 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 2819 while (shared_key) { 2820 LIST_REMOVE(shared_key, next); 2821 sctp_free_sharedkey(shared_key); 2822 /* sa_ignore FREED_MEMORY */ 2823 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 2824 } 2825 2826 inp_save = LIST_NEXT(inp, sctp_list); 2827 LIST_REMOVE(inp, sctp_list); 2828 2829 /* fix any iterators only after out of the list */ 2830 sctp_iterator_inp_being_freed(inp, inp_save); 2831 /* 2832 * if we have an address list the following will free the list of 2833 * ifaddr's that are set into this ep. Again macro limitations here, 2834 * since the LIST_FOREACH could be a bad idea. 2835 */ 2836 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; 2837 laddr = nladdr) { 2838 nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 2839 sctp_remove_laddr(laddr); 2840 } 2841 2842#ifdef SCTP_TRACK_FREED_ASOCS 2843 /* TEMP CODE */ 2844 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; 2845 asoc = nasoc) { 2846 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2847 LIST_REMOVE(asoc, sctp_tcblist); 2848 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc); 2849 SCTP_DECR_ASOC_COUNT(); 2850 } 2851 /* *** END TEMP CODE *** */ 2852#endif 2853 /* Now lets see about freeing the EP hash table. */ 2854 if (inp->sctp_tcbhash != NULL) { 2855 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 2856 inp->sctp_tcbhash = NULL; 2857 } 2858 /* Now we must put the ep memory back into the zone pool */ 2859 SCTP_INP_LOCK_DESTROY(inp); 2860 SCTP_INP_READ_DESTROY(inp); 2861 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 2862 SCTP_INP_INFO_WUNLOCK(); 2863 2864 SCTP_ITERATOR_UNLOCK(); 2865 2866 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 2867 SCTP_DECR_EP_COUNT(); 2868 2869} 2870 2871 2872struct sctp_nets * 2873sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 2874{ 2875 struct sctp_nets *net; 2876 2877 /* locate the address */ 2878 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2879 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 2880 return (net); 2881 } 2882 return (NULL); 2883} 2884 2885 2886int 2887sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 2888{ 2889 struct sctp_ifa *sctp_ifa; 2890 2891 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0); 2892 if (sctp_ifa) { 2893 return (1); 2894 } else { 2895 return (0); 2896 } 2897} 2898 2899void 2900sctp_set_initial_cc_param(struct sctp_tcb *stcb, struct sctp_nets *net) 2901{ 2902 net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND)); 2903 /* we always get at LEAST 2 MTU's */ 2904 if (net->cwnd < (2 * net->mtu)) { 2905 net->cwnd = 2 * net->mtu; 2906 } 2907 net->ssthresh = stcb->asoc.peers_rwnd; 2908} 2909 2910 2911 2912/* 2913 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 2914 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 2915 * stats of stuff. 2916 */ 2917int 2918sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 2919 int set_scope, int from) 2920{ 2921 /* 2922 * The following is redundant to the same lines in the 2923 * sctp_aloc_assoc() but is needed since other's call the add 2924 * address function 2925 */ 2926 struct sctp_nets *net, *netfirst; 2927 int addr_inscope; 2928 2929 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 2930 from); 2931 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 2932 2933 netfirst = sctp_findnet(stcb, newaddr); 2934 if (netfirst) { 2935 /* 2936 * Lie and return ok, we don't want to make the association 2937 * go away for this behavior. It will happen in the TCP 2938 * model in a connected socket. It does not reach the hash 2939 * table until after the association is built so it can't be 2940 * found. Mark as reachable, since the initial creation will 2941 * have been cleared and the NOT_IN_ASSOC flag will have 2942 * been added... and we don't want to end up removing it 2943 * back out. 2944 */ 2945 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 2946 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 2947 SCTP_ADDR_UNCONFIRMED); 2948 } else { 2949 netfirst->dest_state = SCTP_ADDR_REACHABLE; 2950 } 2951 2952 return (0); 2953 } 2954 addr_inscope = 1; 2955 if (newaddr->sa_family == AF_INET) { 2956 struct sockaddr_in *sin; 2957 2958 sin = (struct sockaddr_in *)newaddr; 2959 if (sin->sin_addr.s_addr == 0) { 2960 /* Invalid address */ 2961 return (-1); 2962 } 2963 /* zero out the bzero area */ 2964 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 2965 2966 /* assure len is set */ 2967 sin->sin_len = sizeof(struct sockaddr_in); 2968 if (set_scope) { 2969#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 2970 stcb->ipv4_local_scope = 1; 2971#else 2972 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2973 stcb->asoc.ipv4_local_scope = 1; 2974 } 2975#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 2976 } else { 2977 /* Validate the address is in scope */ 2978 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 2979 (stcb->asoc.ipv4_local_scope == 0)) { 2980 addr_inscope = 0; 2981 } 2982 } 2983 } else if (newaddr->sa_family == AF_INET6) { 2984 struct sockaddr_in6 *sin6; 2985 2986 sin6 = (struct sockaddr_in6 *)newaddr; 2987 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2988 /* Invalid address */ 2989 return (-1); 2990 } 2991 /* assure len is set */ 2992 sin6->sin6_len = sizeof(struct sockaddr_in6); 2993 if (set_scope) { 2994 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 2995 stcb->asoc.loopback_scope = 1; 2996 stcb->asoc.local_scope = 0; 2997 stcb->asoc.ipv4_local_scope = 1; 2998 stcb->asoc.site_scope = 1; 2999 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3000 /* 3001 * If the new destination is a LINK_LOCAL we 3002 * must have common site scope. Don't set 3003 * the local scope since we may not share 3004 * all links, only loopback can do this. 3005 * Links on the local network would also be 3006 * on our private network for v4 too. 3007 */ 3008 stcb->asoc.ipv4_local_scope = 1; 3009 stcb->asoc.site_scope = 1; 3010 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3011 /* 3012 * If the new destination is SITE_LOCAL then 3013 * we must have site scope in common. 3014 */ 3015 stcb->asoc.site_scope = 1; 3016 } 3017 } else { 3018 /* Validate the address is in scope */ 3019 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3020 (stcb->asoc.loopback_scope == 0)) { 3021 addr_inscope = 0; 3022 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3023 (stcb->asoc.local_scope == 0)) { 3024 addr_inscope = 0; 3025 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3026 (stcb->asoc.site_scope == 0)) { 3027 addr_inscope = 0; 3028 } 3029 } 3030 } else { 3031 /* not supported family type */ 3032 return (-1); 3033 } 3034 net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets); 3035 if (net == NULL) { 3036 return (-1); 3037 } 3038 SCTP_INCR_RADDR_COUNT(); 3039 bzero(net, sizeof(*net)); 3040 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3041 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3042 if (newaddr->sa_family == AF_INET) { 3043 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3044 } else if (newaddr->sa_family == AF_INET6) { 3045 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3046 } 3047 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3048 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3049 stcb->asoc.loopback_scope = 1; 3050 stcb->asoc.ipv4_local_scope = 1; 3051 stcb->asoc.local_scope = 0; 3052 stcb->asoc.site_scope = 1; 3053 addr_inscope = 1; 3054 } 3055 net->failure_threshold = stcb->asoc.def_net_failure; 3056 if (addr_inscope == 0) { 3057 net->dest_state = (SCTP_ADDR_REACHABLE | 3058 SCTP_ADDR_OUT_OF_SCOPE); 3059 } else { 3060 if (from == SCTP_ADDR_IS_CONFIRMED) 3061 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3062 net->dest_state = SCTP_ADDR_REACHABLE; 3063 else 3064 net->dest_state = SCTP_ADDR_REACHABLE | 3065 SCTP_ADDR_UNCONFIRMED; 3066 } 3067 net->RTO = stcb->asoc.initial_rto; 3068 stcb->asoc.numnets++; 3069 *(&net->ref_count) = 1; 3070 net->tos_flowlabel = 0; 3071#ifdef INET 3072 if (newaddr->sa_family == AF_INET) 3073 net->tos_flowlabel = stcb->asoc.default_tos; 3074#endif 3075#ifdef INET6 3076 if (newaddr->sa_family == AF_INET6) 3077 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3078#endif 3079 /* Init the timer structure */ 3080 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3081 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3082 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3083 3084 /* Now generate a route for this guy */ 3085 /* KAME hack: embed scopeid */ 3086 if (newaddr->sa_family == AF_INET6) { 3087 struct sockaddr_in6 *sin6; 3088 3089 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3090 (void)sa6_embedscope(sin6, ip6_use_defzone); 3091 sin6->sin6_scope_id = 0; 3092 } 3093 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3094 3095 if (newaddr->sa_family == AF_INET6) { 3096 struct sockaddr_in6 *sin6; 3097 3098 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3099 (void)sa6_recoverscope(sin6); 3100 } 3101 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3102 /* Get source address */ 3103 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3104 stcb, 3105 (sctp_route_t *) & net->ro, 3106 net, 3107 0, 3108 stcb->asoc.vrf_id); 3109 /* Now get the interface MTU */ 3110 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3111 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3112 } else { 3113 net->mtu = 0; 3114 } 3115#ifdef SCTP_PRINT_FOR_B_AND_M 3116 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu); 3117#endif 3118 if (net->mtu == 0) { 3119 /* Huh ?? */ 3120 net->mtu = SCTP_DEFAULT_MTU; 3121 } else { 3122 uint32_t rmtu; 3123 3124 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3125#ifdef SCTP_PRINT_FOR_B_AND_M 3126 SCTP_PRINTF("The route mtu is %d\n", rmtu); 3127#endif 3128 if (rmtu == 0) { 3129 /* 3130 * Start things off to match mtu of 3131 * interface please. 3132 */ 3133 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3134 net->ro.ro_rt, net->mtu); 3135 } else { 3136 /* 3137 * we take the route mtu over the interface, 3138 * since the route may be leading out the 3139 * loopback, or a different interface. 3140 */ 3141 net->mtu = rmtu; 3142 } 3143 } 3144 if (from == SCTP_ALLOC_ASOC) { 3145#ifdef SCTP_PRINT_FOR_B_AND_M 3146 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu); 3147#endif 3148 stcb->asoc.smallest_mtu = net->mtu; 3149 } 3150 } else { 3151 net->mtu = stcb->asoc.smallest_mtu; 3152 } 3153 if (stcb->asoc.smallest_mtu > net->mtu) { 3154#ifdef SCTP_PRINT_FOR_B_AND_M 3155 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n", 3156 net->mtu, stcb->asoc.smallest_mtu); 3157#endif 3158 stcb->asoc.smallest_mtu = net->mtu; 3159 } 3160 /* 3161 * We take the max of the burst limit times a MTU or the 3162 * INITIAL_CWND. We then limit this to 4 MTU's of sending. 3163 */ 3164 sctp_set_initial_cc_param(stcb, net); 3165 3166 3167#if defined(SCTP_CWND_MONITOR) || defined(SCTP_CWND_LOGGING) 3168 sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION); 3169#endif 3170 3171 /* 3172 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3173 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3174 */ 3175 net->find_pseudo_cumack = 1; 3176 net->find_rtx_pseudo_cumack = 1; 3177 net->src_addr_selected = 0; 3178 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3179 if (net->ro.ro_rt == NULL) { 3180 /* Since we have no route put it at the back */ 3181 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3182 } else if (netfirst == NULL) { 3183 /* We are the first one in the pool. */ 3184 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3185 } else if (netfirst->ro.ro_rt == NULL) { 3186 /* 3187 * First one has NO route. Place this one ahead of the first 3188 * one. 3189 */ 3190 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3191 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3192 /* 3193 * This one has a different interface than the one at the 3194 * top of the list. Place it ahead. 3195 */ 3196 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3197 } else { 3198 /* 3199 * Ok we have the same interface as the first one. Move 3200 * forward until we find either a) one with a NULL route... 3201 * insert ahead of that b) one with a different ifp.. insert 3202 * after that. c) end of the list.. insert at the tail. 3203 */ 3204 struct sctp_nets *netlook; 3205 3206 do { 3207 netlook = TAILQ_NEXT(netfirst, sctp_next); 3208 if (netlook == NULL) { 3209 /* End of the list */ 3210 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3211 break; 3212 } else if (netlook->ro.ro_rt == NULL) { 3213 /* next one has NO route */ 3214 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 3215 break; 3216 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 3217 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 3218 net, sctp_next); 3219 break; 3220 } 3221 /* Shift forward */ 3222 netfirst = netlook; 3223 } while (netlook != NULL); 3224 } 3225 3226 /* got to have a primary set */ 3227 if (stcb->asoc.primary_destination == 0) { 3228 stcb->asoc.primary_destination = net; 3229 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 3230 (net->ro.ro_rt) && 3231 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 3232 /* No route to current primary adopt new primary */ 3233 stcb->asoc.primary_destination = net; 3234 } 3235 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 3236 net); 3237 /* Validate primary is first */ 3238 net = TAILQ_FIRST(&stcb->asoc.nets); 3239 if ((net != stcb->asoc.primary_destination) && 3240 (stcb->asoc.primary_destination)) { 3241 /* 3242 * first one on the list is NOT the primary sctp_cmpaddr() 3243 * is much more efficent if the primary is the first on the 3244 * list, make it so. 3245 */ 3246 TAILQ_REMOVE(&stcb->asoc.nets, 3247 stcb->asoc.primary_destination, sctp_next); 3248 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 3249 stcb->asoc.primary_destination, sctp_next); 3250 } 3251 return (0); 3252} 3253 3254 3255/* 3256 * allocate an association and add it to the endpoint. The caller must be 3257 * careful to add all additional addresses once they are know right away or 3258 * else the assoc will be may experience a blackout scenario. 3259 */ 3260struct sctp_tcb * 3261sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 3262 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id) 3263{ 3264 struct sctp_tcb *stcb; 3265 struct sctp_association *asoc; 3266 struct sctpasochead *head; 3267 uint16_t rport; 3268 int err; 3269 3270 /* 3271 * Assumption made here: Caller has done a 3272 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 3273 * address does not exist already. 3274 */ 3275 if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) { 3276 /* Hit max assoc, sorry no more */ 3277 *error = ENOBUFS; 3278 return (NULL); 3279 } 3280 if (firstaddr == NULL) { 3281 *error = EINVAL; 3282 return (NULL); 3283 } 3284 SCTP_INP_RLOCK(inp); 3285 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 3286 /* 3287 * If its in the TCP pool, its NOT allowed to create an 3288 * association. The parent listener needs to call 3289 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 3290 * off, or connected one does this.. its an error. 3291 */ 3292 SCTP_INP_RUNLOCK(inp); 3293 *error = EINVAL; 3294 return (NULL); 3295 } 3296 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 3297#ifdef SCTP_DEBUG 3298 if (firstaddr) { 3299 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 3300 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 3301 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 3302 } else { 3303 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 3304 } 3305#endif /* SCTP_DEBUG */ 3306 if (firstaddr->sa_family == AF_INET) { 3307 struct sockaddr_in *sin; 3308 3309 sin = (struct sockaddr_in *)firstaddr; 3310 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 3311 /* Invalid address */ 3312 SCTP_INP_RUNLOCK(inp); 3313 *error = EINVAL; 3314 return (NULL); 3315 } 3316 rport = sin->sin_port; 3317 } else if (firstaddr->sa_family == AF_INET6) { 3318 struct sockaddr_in6 *sin6; 3319 3320 sin6 = (struct sockaddr_in6 *)firstaddr; 3321 if ((sin6->sin6_port == 0) || 3322 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 3323 /* Invalid address */ 3324 SCTP_INP_RUNLOCK(inp); 3325 *error = EINVAL; 3326 return (NULL); 3327 } 3328 rport = sin6->sin6_port; 3329 } else { 3330 /* not supported family type */ 3331 SCTP_INP_RUNLOCK(inp); 3332 *error = EINVAL; 3333 return (NULL); 3334 } 3335 SCTP_INP_RUNLOCK(inp); 3336 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 3337 /* 3338 * If you have not performed a bind, then we need to do the 3339 * ephemerial bind for you. 3340 */ 3341 if ((err = sctp_inpcb_bind(inp->sctp_socket, 3342 (struct sockaddr *)NULL, 3343 (struct thread *)NULL 3344 ))) { 3345 /* bind error, probably perm */ 3346 *error = err; 3347 return (NULL); 3348 } 3349 } 3350 stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb); 3351 if (stcb == NULL) { 3352 /* out of memory? */ 3353 *error = ENOMEM; 3354 return (NULL); 3355 } 3356 SCTP_INCR_ASOC_COUNT(); 3357 3358 bzero(stcb, sizeof(*stcb)); 3359 asoc = &stcb->asoc; 3360 SCTP_TCB_LOCK_INIT(stcb); 3361 SCTP_TCB_SEND_LOCK_INIT(stcb); 3362 /* setup back pointer's */ 3363 stcb->sctp_ep = inp; 3364 stcb->sctp_socket = inp->sctp_socket; 3365 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) { 3366 /* failed */ 3367 SCTP_TCB_LOCK_DESTROY(stcb); 3368 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3369 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3370 SCTP_DECR_ASOC_COUNT(); 3371 *error = err; 3372 return (NULL); 3373 } 3374 /* and the port */ 3375 stcb->rport = rport; 3376 SCTP_INP_INFO_WLOCK(); 3377 SCTP_INP_WLOCK(inp); 3378 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3379 /* inpcb freed while alloc going on */ 3380 SCTP_TCB_LOCK_DESTROY(stcb); 3381 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3382 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3383 SCTP_INP_WUNLOCK(inp); 3384 SCTP_INP_INFO_WUNLOCK(); 3385 SCTP_DECR_ASOC_COUNT(); 3386 *error = EINVAL; 3387 return (NULL); 3388 } 3389 SCTP_TCB_LOCK(stcb); 3390 3391 /* now that my_vtag is set, add it to the hash */ 3392 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, 3393 sctppcbinfo.hashasocmark)]; 3394 /* put it in the bucket in the vtag hash of assoc's for the system */ 3395 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 3396 SCTP_INP_INFO_WUNLOCK(); 3397 3398 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 3399 /* failure.. memory error? */ 3400 if (asoc->strmout) { 3401 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 3402 asoc->strmout = NULL; 3403 } 3404 if (asoc->mapping_array) { 3405 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 3406 asoc->mapping_array = NULL; 3407 } 3408 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3409 SCTP_DECR_ASOC_COUNT(); 3410 SCTP_TCB_LOCK_DESTROY(stcb); 3411 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3412 SCTP_INP_WUNLOCK(inp); 3413 *error = ENOBUFS; 3414 return (NULL); 3415 } 3416 /* Init all the timers */ 3417 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 3418 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 3419 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 3420 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 3421 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 3422 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 3423 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 3424 3425 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 3426 /* now file the port under the hash as well */ 3427 if (inp->sctp_tcbhash != NULL) { 3428 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 3429 inp->sctp_hashmark)]; 3430 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 3431 } 3432 SCTP_INP_WUNLOCK(inp); 3433 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 3434 return (stcb); 3435} 3436 3437 3438void 3439sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 3440{ 3441 struct sctp_association *asoc; 3442 3443 asoc = &stcb->asoc; 3444 asoc->numnets--; 3445 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 3446 if (net == asoc->primary_destination) { 3447 /* Reset primary */ 3448 struct sctp_nets *lnet; 3449 3450 lnet = TAILQ_FIRST(&asoc->nets); 3451 /* Try to find a confirmed primary */ 3452 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 3453 } 3454 if (net == asoc->last_data_chunk_from) { 3455 /* Reset primary */ 3456 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 3457 } 3458 if (net == asoc->last_control_chunk_from) { 3459 /* Clear net */ 3460 asoc->last_control_chunk_from = NULL; 3461 } 3462 sctp_free_remote_addr(net); 3463} 3464 3465/* 3466 * remove a remote endpoint address from an association, it will fail if the 3467 * address does not exist. 3468 */ 3469int 3470sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 3471{ 3472 /* 3473 * Here we need to remove a remote address. This is quite simple, we 3474 * first find it in the list of address for the association 3475 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 3476 * on that item. Note we do not allow it to be removed if there are 3477 * no other addresses. 3478 */ 3479 struct sctp_association *asoc; 3480 struct sctp_nets *net, *net_tmp; 3481 3482 asoc = &stcb->asoc; 3483 3484 /* locate the address */ 3485 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { 3486 net_tmp = TAILQ_NEXT(net, sctp_next); 3487 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 3488 continue; 3489 } 3490 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 3491 remaddr)) { 3492 /* we found the guy */ 3493 if (asoc->numnets < 2) { 3494 /* Must have at LEAST two remote addresses */ 3495 return (-1); 3496 } else { 3497 sctp_remove_net(stcb, net); 3498 return (0); 3499 } 3500 } 3501 } 3502 /* not found. */ 3503 return (-2); 3504} 3505 3506 3507void 3508sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time) 3509{ 3510 struct sctpvtaghead *chain; 3511 struct sctp_tagblock *twait_block; 3512 struct timeval now; 3513 int set, i; 3514 3515 (void)SCTP_GETTIME_TIMEVAL(&now); 3516 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 3517 set = 0; 3518 if (!SCTP_LIST_EMPTY(chain)) { 3519 /* Block(s) present, lets find space, and expire on the fly */ 3520 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 3521 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 3522 if ((twait_block->vtag_block[i].v_tag == 0) && 3523 !set) { 3524 twait_block->vtag_block[i].tv_sec_at_expire = 3525 now.tv_sec + time; 3526 twait_block->vtag_block[i].v_tag = tag; 3527 set = 1; 3528 } else if ((twait_block->vtag_block[i].v_tag) && 3529 ((long)twait_block->vtag_block[i].tv_sec_at_expire > 3530 now.tv_sec)) { 3531 /* Audit expires this guy */ 3532 twait_block->vtag_block[i].tv_sec_at_expire = 0; 3533 twait_block->vtag_block[i].v_tag = 0; 3534 if (set == 0) { 3535 /* Reuse it for my new tag */ 3536 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT; 3537 twait_block->vtag_block[0].v_tag = tag; 3538 set = 1; 3539 } 3540 } 3541 } 3542 if (set) { 3543 /* 3544 * We only do up to the block where we can 3545 * place our tag for audits 3546 */ 3547 break; 3548 } 3549 } 3550 } 3551 /* Need to add a new block to chain */ 3552 if (!set) { 3553 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 3554 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 3555 if (twait_block == NULL) { 3556 return; 3557 } 3558 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 3559 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 3560 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + 3561 SCTP_TIME_WAIT; 3562 twait_block->vtag_block[0].v_tag = tag; 3563 } 3564} 3565 3566 3567static void 3568sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 3569{ 3570 struct sctp_iterator *it; 3571 3572 /* 3573 * Unlock the tcb lock we do this so we avoid a dead lock scenario 3574 * where the iterator is waiting on the TCB lock and the TCB lock is 3575 * waiting on the iterator lock. 3576 */ 3577 it = stcb->asoc.stcb_starting_point_for_iterator; 3578 if (it == NULL) { 3579 return; 3580 } 3581 if (it->inp != stcb->sctp_ep) { 3582 /* hmm, focused on the wrong one? */ 3583 return; 3584 } 3585 if (it->stcb != stcb) { 3586 return; 3587 } 3588 it->stcb = LIST_NEXT(stcb, sctp_tcblist); 3589 if (it->stcb == NULL) { 3590 /* done with all asoc's in this assoc */ 3591 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3592 it->inp = NULL; 3593 } else { 3594 it->inp = LIST_NEXT(inp, sctp_list); 3595 } 3596 } 3597} 3598 3599 3600/* 3601 * Free the association after un-hashing the remote port. 3602 */ 3603int 3604sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 3605{ 3606 int i; 3607 struct sctp_association *asoc; 3608 struct sctp_nets *net, *prev; 3609 struct sctp_laddr *laddr; 3610 struct sctp_tmit_chunk *chk; 3611 struct sctp_asconf_addr *aparam; 3612 struct sctp_stream_reset_list *liste; 3613 struct sctp_queued_to_read *sq; 3614 struct sctp_stream_queue_pending *sp; 3615 sctp_sharedkey_t *shared_key; 3616 struct socket *so; 3617 int ccnt = 0; 3618 int cnt = 0; 3619 3620 /* first, lets purge the entry from the hash table. */ 3621 3622#ifdef SCTP_LOG_CLOSING 3623 sctp_log_closing(inp, stcb, 6); 3624#endif 3625 if (stcb->asoc.state == 0) { 3626#ifdef SCTP_LOG_CLOSING 3627 sctp_log_closing(inp, NULL, 7); 3628#endif 3629 /* there is no asoc, really TSNH :-0 */ 3630 return (1); 3631 } 3632 /* TEMP CODE */ 3633 if (stcb->freed_from_where == 0) { 3634 /* Only record the first place free happened from */ 3635 stcb->freed_from_where = from_location; 3636 } 3637 /* TEMP CODE */ 3638 3639 asoc = &stcb->asoc; 3640 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3641 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3642 /* nothing around */ 3643 so = NULL; 3644 else 3645 so = inp->sctp_socket; 3646 3647 /* 3648 * We used timer based freeing if a reader or writer is in the way. 3649 * So we first check if we are actually being called from a timer, 3650 * if so we abort early if a reader or writer is still in the way. 3651 */ 3652 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 3653 (from_inpcbfree == SCTP_NORMAL_PROC)) { 3654 /* 3655 * is it the timer driving us? if so are the reader/writers 3656 * gone? 3657 */ 3658 if (stcb->asoc.refcnt) { 3659 /* nope, reader or writer in the way */ 3660 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3661 /* no asoc destroyed */ 3662 SCTP_TCB_UNLOCK(stcb); 3663#ifdef SCTP_LOG_CLOSING 3664 sctp_log_closing(inp, stcb, 8); 3665#endif 3666 return (0); 3667 } 3668 } 3669 /* now clean up any other timers */ 3670 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 3671 asoc->hb_timer.self = NULL; 3672 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 3673 asoc->dack_timer.self = NULL; 3674 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3675 /*- 3676 * For stream reset we don't blast this unless 3677 * it is a str-reset timer, it might be the 3678 * free-asoc timer which we DON'T want to 3679 * disturb. 3680 */ 3681 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 3682 asoc->strreset_timer.self = NULL; 3683 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 3684 asoc->asconf_timer.self = NULL; 3685 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 3686 asoc->autoclose_timer.self = NULL; 3687 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 3688 asoc->shut_guard_timer.self = NULL; 3689 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 3690 asoc->delayed_event_timer.self = NULL; 3691 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 3692 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 3693 net->fr_timer.self = NULL; 3694 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 3695 net->rxt_timer.self = NULL; 3696 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 3697 net->pmtu_timer.self = NULL; 3698 } 3699 /* Now the read queue needs to be cleaned up (only once) */ 3700 cnt = 0; 3701 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 3702 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 3703 SCTP_INP_READ_LOCK(inp); 3704 TAILQ_FOREACH(sq, &inp->read_queue, next) { 3705 if (sq->stcb == stcb) { 3706 sq->do_not_ref_stcb = 1; 3707 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 3708 /* 3709 * If there is no end, there never will be 3710 * now. 3711 */ 3712 if (sq->end_added == 0) { 3713 /* Held for PD-API clear that. */ 3714 sq->pdapi_aborted = 1; 3715 sq->held_length = 0; 3716 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) { 3717 /* 3718 * Need to add a PD-API 3719 * aborted indication. 3720 * Setting the control_pdapi 3721 * assures that it will be 3722 * added right after this 3723 * msg. 3724 */ 3725 uint32_t strseq; 3726 3727 stcb->asoc.control_pdapi = sq; 3728 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 3729 sctp_notify_partial_delivery_indication(stcb, 3730 SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq); 3731 stcb->asoc.control_pdapi = NULL; 3732 } 3733 } 3734 /* Add an end to wake them */ 3735 sq->end_added = 1; 3736 cnt++; 3737 } 3738 } 3739 SCTP_INP_READ_UNLOCK(inp); 3740 if (stcb->block_entry) { 3741 cnt++; 3742 stcb->block_entry->error = ECONNRESET; 3743 stcb->block_entry = NULL; 3744 } 3745 } 3746 if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) { 3747 /* 3748 * reader or writer in the way, we have hopefully given him 3749 * something to chew on above. 3750 */ 3751 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3752 SCTP_TCB_UNLOCK(stcb); 3753 if (so) { 3754 SCTP_INP_RLOCK(inp); 3755 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3756 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3757 /* nothing around */ 3758 so = NULL; 3759 if (so) { 3760 /* Wake any reader/writers */ 3761 sctp_sorwakeup(inp, so); 3762 sctp_sowwakeup(inp, so); 3763 } 3764 SCTP_INP_RUNLOCK(inp); 3765 3766 } 3767#ifdef SCTP_LOG_CLOSING 3768 sctp_log_closing(inp, stcb, 9); 3769#endif 3770 /* no asoc destroyed */ 3771 return (0); 3772 } 3773#ifdef SCTP_LOG_CLOSING 3774 sctp_log_closing(inp, stcb, 10); 3775#endif 3776 /* 3777 * When I reach here, no others want to kill the assoc yet.. and I 3778 * own the lock. Now its possible an abort comes in when I do the 3779 * lock exchange below to grab all the locks to do the final take 3780 * out. to prevent this we increment the count, which will start a 3781 * timer and blow out above thus assuring us that we hold exclusive 3782 * killing of the asoc. Note that after getting back the TCB lock we 3783 * will go ahead and increment the counter back up and stop any 3784 * timer a passing stranger may have started :-S 3785 */ 3786 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3787 atomic_add_int(&stcb->asoc.refcnt, 1); 3788 3789 SCTP_TCB_UNLOCK(stcb); 3790 3791 SCTP_ITERATOR_LOCK(); 3792 SCTP_INP_INFO_WLOCK(); 3793 SCTP_INP_WLOCK(inp); 3794 SCTP_TCB_LOCK(stcb); 3795 } 3796 /* Double check the GONE flag */ 3797 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3798 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3799 /* nothing around */ 3800 so = NULL; 3801 3802 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 3803 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 3804 /* 3805 * For TCP type we need special handling when we are 3806 * connected. We also include the peel'ed off ones to. 3807 */ 3808 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 3809 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 3810 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 3811 if (so) { 3812 SOCK_LOCK(so); 3813 if (so->so_rcv.sb_cc == 0) { 3814 so->so_state &= ~(SS_ISCONNECTING | 3815 SS_ISDISCONNECTING | 3816 SS_ISCONFIRMING | 3817 SS_ISCONNECTED); 3818 } 3819 SOCK_UNLOCK(so); 3820 sctp_sowwakeup(inp, so); 3821 sctp_sorwakeup(inp, so); 3822 SCTP_SOWAKEUP(so); 3823 } 3824 } 3825 } 3826 /* 3827 * Make it invalid too, that way if its about to run it will abort 3828 * and return. 3829 */ 3830 sctp_iterator_asoc_being_freed(inp, stcb); 3831 /* re-increment the lock */ 3832 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3833 atomic_add_int(&stcb->asoc.refcnt, -1); 3834 } 3835 asoc->state = 0; 3836 if (inp->sctp_tcbhash) { 3837 LIST_REMOVE(stcb, sctp_tcbhash); 3838 } 3839 if (stcb->asoc.in_restart_hash) { 3840 LIST_REMOVE(stcb, sctp_tcbrestarhash); 3841 } 3842 /* Now lets remove it from the list of ALL associations in the EP */ 3843 LIST_REMOVE(stcb, sctp_tcblist); 3844 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3845 SCTP_INP_INCR_REF(inp); 3846 SCTP_INP_WUNLOCK(inp); 3847 SCTP_ITERATOR_UNLOCK(); 3848 } 3849 /* pull from vtag hash */ 3850 LIST_REMOVE(stcb, sctp_asocs); 3851 sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT); 3852 3853 3854 /* 3855 * Now restop the timers to be sure - this is paranoia at is finest! 3856 */ 3857 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3858 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 3859 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 3860 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3861 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 3862 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 3863 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 3864 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 3865 3866 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 3867 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 3868 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 3869 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 3870 } 3871 3872 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 3873 prev = NULL; 3874 /* 3875 * The chunk lists and such SHOULD be empty but we check them just 3876 * in case. 3877 */ 3878 /* anything on the wheel needs to be removed */ 3879 for (i = 0; i < asoc->streamoutcnt; i++) { 3880 struct sctp_stream_out *outs; 3881 3882 outs = &asoc->strmout[i]; 3883 /* now clean up any chunks here */ 3884 sp = TAILQ_FIRST(&outs->outqueue); 3885 while (sp) { 3886 TAILQ_REMOVE(&outs->outqueue, sp, next); 3887 if (sp->data) { 3888 sctp_m_freem(sp->data); 3889 sp->data = NULL; 3890 sp->tail_mbuf = NULL; 3891 } 3892 sctp_free_remote_addr(sp->net); 3893 sctp_free_spbufspace(stcb, asoc, sp); 3894 /* Free the zone stuff */ 3895 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp); 3896 SCTP_DECR_STRMOQ_COUNT(); 3897 /* sa_ignore FREED_MEMORY */ 3898 sp = TAILQ_FIRST(&outs->outqueue); 3899 } 3900 } 3901 3902 /* sa_ignore FREED_MEMORY */ 3903 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { 3904 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); 3905 SCTP_FREE(liste, SCTP_M_STRESET); 3906 } 3907 3908 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 3909 while (sq) { 3910 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 3911 if (sq->data) { 3912 sctp_m_freem(sq->data); 3913 sq->data = NULL; 3914 } 3915 sctp_free_remote_addr(sq->whoFrom); 3916 sq->whoFrom = NULL; 3917 sq->stcb = NULL; 3918 /* Free the ctl entry */ 3919 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); 3920 SCTP_DECR_READQ_COUNT(); 3921 /* sa_ignore FREED_MEMORY */ 3922 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 3923 } 3924 3925 chk = TAILQ_FIRST(&asoc->free_chunks); 3926 while (chk) { 3927 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 3928 if (chk->data) { 3929 sctp_m_freem(chk->data); 3930 chk->data = NULL; 3931 } 3932 ccnt++; 3933 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 3934 SCTP_DECR_CHK_COUNT(); 3935 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1); 3936 asoc->free_chunk_cnt--; 3937 /* sa_ignore FREED_MEMORY */ 3938 chk = TAILQ_FIRST(&asoc->free_chunks); 3939 } 3940 /* pending send queue SHOULD be empty */ 3941 if (!TAILQ_EMPTY(&asoc->send_queue)) { 3942 chk = TAILQ_FIRST(&asoc->send_queue); 3943 while (chk) { 3944 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 3945 if (chk->data) { 3946 sctp_m_freem(chk->data); 3947 chk->data = NULL; 3948 } 3949 ccnt++; 3950 sctp_free_remote_addr(chk->whoTo); 3951 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 3952 SCTP_DECR_CHK_COUNT(); 3953 /* sa_ignore FREED_MEMORY */ 3954 chk = TAILQ_FIRST(&asoc->send_queue); 3955 } 3956 } 3957/* 3958 if(ccnt) { 3959 printf("Freed %d from send_queue\n", ccnt); 3960 ccnt = 0; 3961 } 3962*/ 3963 /* sent queue SHOULD be empty */ 3964 if (!TAILQ_EMPTY(&asoc->sent_queue)) { 3965 chk = TAILQ_FIRST(&asoc->sent_queue); 3966 while (chk) { 3967 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 3968 if (chk->data) { 3969 sctp_m_freem(chk->data); 3970 chk->data = NULL; 3971 } 3972 ccnt++; 3973 sctp_free_remote_addr(chk->whoTo); 3974 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 3975 SCTP_DECR_CHK_COUNT(); 3976 /* sa_ignore FREED_MEMORY */ 3977 chk = TAILQ_FIRST(&asoc->sent_queue); 3978 } 3979 } 3980/* 3981 if(ccnt) { 3982 printf("Freed %d from sent_queue\n", ccnt); 3983 ccnt = 0; 3984 } 3985*/ 3986 /* control queue MAY not be empty */ 3987 if (!TAILQ_EMPTY(&asoc->control_send_queue)) { 3988 chk = TAILQ_FIRST(&asoc->control_send_queue); 3989 while (chk) { 3990 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 3991 if (chk->data) { 3992 sctp_m_freem(chk->data); 3993 chk->data = NULL; 3994 } 3995 ccnt++; 3996 sctp_free_remote_addr(chk->whoTo); 3997 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 3998 SCTP_DECR_CHK_COUNT(); 3999 /* sa_ignore FREED_MEMORY */ 4000 chk = TAILQ_FIRST(&asoc->control_send_queue); 4001 } 4002 } 4003/* 4004 if(ccnt) { 4005 printf("Freed %d from ctrl_queue\n", ccnt); 4006 ccnt = 0; 4007 } 4008*/ 4009 if (!TAILQ_EMPTY(&asoc->reasmqueue)) { 4010 chk = TAILQ_FIRST(&asoc->reasmqueue); 4011 while (chk) { 4012 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4013 if (chk->data) { 4014 sctp_m_freem(chk->data); 4015 chk->data = NULL; 4016 } 4017 sctp_free_remote_addr(chk->whoTo); 4018 ccnt++; 4019 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4020 SCTP_DECR_CHK_COUNT(); 4021 /* sa_ignore FREED_MEMORY */ 4022 chk = TAILQ_FIRST(&asoc->reasmqueue); 4023 } 4024 } 4025/* 4026 if(ccnt) { 4027 printf("Freed %d from reasm_queue\n", ccnt); 4028 ccnt = 0; 4029 } 4030*/ 4031 if (asoc->mapping_array) { 4032 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4033 asoc->mapping_array = NULL; 4034 } 4035 /* the stream outs */ 4036 if (asoc->strmout) { 4037 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4038 asoc->strmout = NULL; 4039 } 4040 asoc->streamoutcnt = 0; 4041 if (asoc->strmin) { 4042 struct sctp_queued_to_read *ctl; 4043 4044 for (i = 0; i < asoc->streamincnt; i++) { 4045 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { 4046 /* We have somethings on the streamin queue */ 4047 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4048 while (ctl) { 4049 TAILQ_REMOVE(&asoc->strmin[i].inqueue, 4050 ctl, next); 4051 sctp_free_remote_addr(ctl->whoFrom); 4052 if (ctl->data) { 4053 sctp_m_freem(ctl->data); 4054 ctl->data = NULL; 4055 } 4056 /* 4057 * We don't free the address here 4058 * since all the net's were freed 4059 * above. 4060 */ 4061 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); 4062 SCTP_DECR_READQ_COUNT(); 4063 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4064 } 4065 } 4066 } 4067 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4068 asoc->strmin = NULL; 4069 } 4070 asoc->streamincnt = 0; 4071 while (!TAILQ_EMPTY(&asoc->nets)) { 4072 /* sa_ignore FREED_MEMORY */ 4073 net = TAILQ_FIRST(&asoc->nets); 4074 /* pull from list */ 4075 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) { 4076#ifdef INVARIANTS 4077 panic("no net's left alloc'ed, or list points to itself"); 4078#endif 4079 break; 4080 } 4081 prev = net; 4082 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4083 sctp_free_remote_addr(net); 4084 } 4085 4086 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) { 4087 /* sa_ignore FREED_MEMORY */ 4088 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); 4089 sctp_remove_laddr(laddr); 4090 } 4091 4092 /* pending asconf (address) parameters */ 4093 while (!TAILQ_EMPTY(&asoc->asconf_queue)) { 4094 /* sa_ignore FREED_MEMORY */ 4095 aparam = TAILQ_FIRST(&asoc->asconf_queue); 4096 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 4097 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 4098 } 4099 if (asoc->last_asconf_ack_sent != NULL) { 4100 sctp_m_freem(asoc->last_asconf_ack_sent); 4101 asoc->last_asconf_ack_sent = NULL; 4102 } 4103 /* clean up auth stuff */ 4104 if (asoc->local_hmacs) 4105 sctp_free_hmaclist(asoc->local_hmacs); 4106 if (asoc->peer_hmacs) 4107 sctp_free_hmaclist(asoc->peer_hmacs); 4108 4109 if (asoc->local_auth_chunks) 4110 sctp_free_chunklist(asoc->local_auth_chunks); 4111 if (asoc->peer_auth_chunks) 4112 sctp_free_chunklist(asoc->peer_auth_chunks); 4113 4114 sctp_free_authinfo(&asoc->authinfo); 4115 4116 shared_key = LIST_FIRST(&asoc->shared_keys); 4117 while (shared_key) { 4118 LIST_REMOVE(shared_key, next); 4119 sctp_free_sharedkey(shared_key); 4120 /* sa_ignore FREED_MEMORY */ 4121 shared_key = LIST_FIRST(&asoc->shared_keys); 4122 } 4123 4124 /* Insert new items here :> */ 4125 4126 /* Get rid of LOCK */ 4127 SCTP_TCB_LOCK_DESTROY(stcb); 4128 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4129 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4130 SCTP_INP_INFO_WUNLOCK(); 4131 SCTP_INP_RLOCK(inp); 4132 } 4133#ifdef SCTP_TRACK_FREED_ASOCS 4134 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4135 /* now clean up the tasoc itself */ 4136 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 4137 SCTP_DECR_ASOC_COUNT(); 4138 } else { 4139 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 4140 } 4141#else 4142 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 4143 SCTP_DECR_ASOC_COUNT(); 4144#endif 4145 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4146 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4147 /* 4148 * If its NOT the inp_free calling us AND sctp_close 4149 * as been called, we call back... 4150 */ 4151 SCTP_INP_RUNLOCK(inp); 4152 /* 4153 * This will start the kill timer (if we are the 4154 * lastone) since we hold an increment yet. But this 4155 * is the only safe way to do this since otherwise 4156 * if the socket closes at the same time we are here 4157 * we might collide in the cleanup. 4158 */ 4159 sctp_inpcb_free(inp, 4160 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 4161 SCTP_CALLED_DIRECTLY_NOCMPSET); 4162 SCTP_INP_DECR_REF(inp); 4163 goto out_of; 4164 } else { 4165 /* The socket is still open. */ 4166 SCTP_INP_DECR_REF(inp); 4167 } 4168 } 4169 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4170 SCTP_INP_RUNLOCK(inp); 4171 } 4172out_of: 4173 /* destroyed the asoc */ 4174#ifdef SCTP_LOG_CLOSING 4175 sctp_log_closing(inp, NULL, 11); 4176#endif 4177 return (1); 4178} 4179 4180 4181 4182/* 4183 * determine if a destination is "reachable" based upon the addresses bound 4184 * to the current endpoint (e.g. only v4 or v6 currently bound) 4185 */ 4186/* 4187 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 4188 * assoc level v4/v6 flags, as the assoc *may* not have the same address 4189 * types bound as its endpoint 4190 */ 4191int 4192sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 4193{ 4194 struct sctp_inpcb *inp; 4195 int answer; 4196 4197 /* 4198 * No locks here, the TCB, in all cases is already locked and an 4199 * assoc is up. There is either a INP lock by the caller applied (in 4200 * asconf case when deleting an address) or NOT in the HB case, 4201 * however if HB then the INP increment is up and the INP will not 4202 * be removed (on top of the fact that we have a TCB lock). So we 4203 * only want to read the sctp_flags, which is either bound-all or 4204 * not.. no protection needed since once an assoc is up you can't be 4205 * changing your binding. 4206 */ 4207 inp = stcb->sctp_ep; 4208 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4209 /* if bound all, destination is not restricted */ 4210 /* 4211 * RRS: Question during lock work: Is this correct? If you 4212 * are bound-all you still might need to obey the V4--V6 4213 * flags??? IMO this bound-all stuff needs to be removed! 4214 */ 4215 return (1); 4216 } 4217 /* NOTE: all "scope" checks are done when local addresses are added */ 4218 if (destaddr->sa_family == AF_INET6) { 4219 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 4220 } else if (destaddr->sa_family == AF_INET) { 4221 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 4222 } else { 4223 /* invalid family, so it's unreachable */ 4224 answer = 0; 4225 } 4226 return (answer); 4227} 4228 4229/* 4230 * update the inp_vflags on an endpoint 4231 */ 4232static void 4233sctp_update_ep_vflag(struct sctp_inpcb *inp) 4234{ 4235 struct sctp_laddr *laddr; 4236 4237 /* first clear the flag */ 4238 inp->ip_inp.inp.inp_vflag = 0; 4239 /* set the flag based on addresses on the ep list */ 4240 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4241 if (laddr->ifa == NULL) { 4242 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 4243 __FUNCTION__); 4244 continue; 4245 } 4246 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 4247 continue; 4248 } 4249 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 4250 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4251 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 4252 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4253 } 4254 } 4255} 4256 4257/* 4258 * Add the address to the endpoint local address list There is nothing to be 4259 * done if we are bound to all addresses 4260 */ 4261void 4262sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 4263{ 4264 struct sctp_laddr *laddr; 4265 int fnd, error = 0; 4266 4267 fnd = 0; 4268 4269 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4270 /* You are already bound to all. You have it already */ 4271 return; 4272 } 4273 if (ifa->address.sa.sa_family == AF_INET6) { 4274 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 4275 /* Can't bind a non-useable addr. */ 4276 return; 4277 } 4278 } 4279 /* first, is it already present? */ 4280 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4281 if (laddr->ifa == ifa) { 4282 fnd = 1; 4283 break; 4284 } 4285 } 4286 4287 if (fnd == 0) { 4288 /* Not in the ep list */ 4289 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 4290 if (error != 0) 4291 return; 4292 inp->laddr_count++; 4293 /* update inp_vflag flags */ 4294 if (ifa->address.sa.sa_family == AF_INET6) { 4295 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4296 } else if (ifa->address.sa.sa_family == AF_INET) { 4297 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4298 } 4299 } 4300 return; 4301} 4302 4303 4304/* 4305 * select a new (hopefully reachable) destination net (should only be used 4306 * when we deleted an ep addr that is the only usable source address to reach 4307 * the destination net) 4308 */ 4309static void 4310sctp_select_primary_destination(struct sctp_tcb *stcb) 4311{ 4312 struct sctp_nets *net; 4313 4314 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4315 /* for now, we'll just pick the first reachable one we find */ 4316 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 4317 continue; 4318 if (sctp_destination_is_reachable(stcb, 4319 (struct sockaddr *)&net->ro._l_addr)) { 4320 /* found a reachable destination */ 4321 stcb->asoc.primary_destination = net; 4322 } 4323 } 4324 /* I can't there from here! ...we're gonna die shortly... */ 4325} 4326 4327 4328/* 4329 * Delete the address from the endpoint local address list There is nothing 4330 * to be done if we are bound to all addresses 4331 */ 4332void 4333sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 4334{ 4335 struct sctp_laddr *laddr; 4336 int fnd; 4337 4338 fnd = 0; 4339 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4340 /* You are already bound to all. You have it already */ 4341 return; 4342 } 4343 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4344 if (laddr->ifa == ifa) { 4345 fnd = 1; 4346 break; 4347 } 4348 } 4349 if (fnd && (inp->laddr_count < 2)) { 4350 /* can't delete unless there are at LEAST 2 addresses */ 4351 return; 4352 } 4353 if (fnd) { 4354 /* 4355 * clean up any use of this address go through our 4356 * associations and clear any last_used_address that match 4357 * this one for each assoc, see if a new primary_destination 4358 * is needed 4359 */ 4360 struct sctp_tcb *stcb; 4361 4362 /* clean up "next_addr_touse" */ 4363 if (inp->next_addr_touse == laddr) 4364 /* delete this address */ 4365 inp->next_addr_touse = NULL; 4366 4367 /* clean up "last_used_address" */ 4368 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 4369 struct sctp_nets *net; 4370 4371 SCTP_TCB_LOCK(stcb); 4372 if (stcb->asoc.last_used_address == laddr) 4373 /* delete this address */ 4374 stcb->asoc.last_used_address = NULL; 4375 /* 4376 * Now spin through all the nets and purge any ref 4377 * to laddr 4378 */ 4379 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4380 if (net->ro._s_addr && 4381 (net->ro._s_addr->ifa == laddr->ifa)) { 4382 /* Yep, purge src address selected */ 4383 sctp_rtentry_t *rt; 4384 4385 /* delete this address if cached */ 4386 rt = net->ro.ro_rt; 4387 if (rt != NULL) { 4388 RTFREE(rt); 4389 net->ro.ro_rt = NULL; 4390 } 4391 sctp_free_ifa(net->ro._s_addr); 4392 net->ro._s_addr = NULL; 4393 net->src_addr_selected = 0; 4394 } 4395 } 4396 SCTP_TCB_UNLOCK(stcb); 4397 } /* for each tcb */ 4398 /* remove it from the ep list */ 4399 sctp_remove_laddr(laddr); 4400 inp->laddr_count--; 4401 /* update inp_vflag flags */ 4402 sctp_update_ep_vflag(inp); 4403 } 4404 return; 4405} 4406 4407/* 4408 * Add the addr to the TCB local address list For the BOUNDALL or dynamic 4409 * case, this is a "pending" address list (eg. addresses waiting for an 4410 * ASCONF-ACK response) For the subset binding, static case, this is a 4411 * "valid" address list 4412 */ 4413void 4414sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa, int restricted_list) 4415{ 4416 struct sctp_inpcb *inp; 4417 struct sctp_laddr *laddr; 4418 struct sctpladdr *list; 4419 4420 /* 4421 * Assumes TCB is locked.. and possibly the INP. May need to 4422 * confirm/fix that if we need it and is not the case. 4423 */ 4424 list = &stcb->asoc.sctp_restricted_addrs; 4425 4426 inp = stcb->sctp_ep; 4427 if (ifa->address.sa.sa_family == AF_INET6) { 4428 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 4429 /* Can't bind a non-existent addr. */ 4430 return; 4431 } 4432 } 4433 /* does the address already exist? */ 4434 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 4435 if (laddr->ifa == ifa) { 4436 return; 4437 } 4438 } 4439 4440 /* add to the list */ 4441 (void)sctp_insert_laddr(list, ifa, 0); 4442 return; 4443} 4444 4445/* 4446 * insert an laddr entry with the given ifa for the desired list 4447 */ 4448int 4449sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 4450{ 4451 struct sctp_laddr *laddr; 4452 4453 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 4454 if (laddr == NULL) { 4455 /* out of memory? */ 4456 return (EINVAL); 4457 } 4458 SCTP_INCR_LADDR_COUNT(); 4459 bzero(laddr, sizeof(*laddr)); 4460 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 4461 laddr->ifa = ifa; 4462 laddr->action = act; 4463 atomic_add_int(&ifa->refcount, 1); 4464 /* insert it */ 4465 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 4466 4467 return (0); 4468} 4469 4470/* 4471 * Remove an laddr entry from the local address list (on an assoc) 4472 */ 4473void 4474sctp_remove_laddr(struct sctp_laddr *laddr) 4475{ 4476 4477 /* remove from the list */ 4478 LIST_REMOVE(laddr, sctp_nxt_addr); 4479 sctp_free_ifa(laddr->ifa); 4480 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr); 4481 SCTP_DECR_LADDR_COUNT(); 4482} 4483 4484/* 4485 * Remove an address from the TCB local address list 4486 */ 4487void 4488sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 4489{ 4490 struct sctp_inpcb *inp; 4491 struct sctp_laddr *laddr; 4492 4493 /* 4494 * This is called by asconf work. It is assumed that a) The TCB is 4495 * locked and b) The INP is locked. This is true in as much as I can 4496 * trace through the entry asconf code where I did these locks. 4497 * Again, the ASCONF code is a bit different in that it does lock 4498 * the INP during its work often times. This must be since we don't 4499 * want other proc's looking up things while what they are looking 4500 * up is changing :-D 4501 */ 4502 4503 inp = stcb->sctp_ep; 4504 /* if subset bound and don't allow ASCONF's, can't delete last */ 4505 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 4506 (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF) == 0)) { 4507 if (stcb->asoc.numnets < 2) { 4508 /* can't delete last address */ 4509 return; 4510 } 4511 } 4512 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 4513 /* remove the address if it exists */ 4514 if (laddr->ifa == NULL) 4515 continue; 4516 if (laddr->ifa == ifa) { 4517 sctp_remove_laddr(laddr); 4518 return; 4519 } 4520 } 4521 4522 /* address not found! */ 4523 return; 4524} 4525 4526static char sctp_pcb_initialized = 0; 4527 4528/* 4529 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 4530 */ 4531/* sysctl */ 4532static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 4533static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 4534 4535void 4536sctp_pcb_init() 4537{ 4538 /* 4539 * SCTP initialization for the PCB structures should be called by 4540 * the sctp_init() funciton. 4541 */ 4542 int i; 4543 4544 if (sctp_pcb_initialized != 0) { 4545 /* error I was called twice */ 4546 return; 4547 } 4548 sctp_pcb_initialized = 1; 4549 4550 bzero(&sctpstat, sizeof(struct sctpstat)); 4551 (void)SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime); 4552 /* init the empty list of (All) Endpoints */ 4553 LIST_INIT(&sctppcbinfo.listhead); 4554 4555 /* init the iterator head */ 4556 TAILQ_INIT(&sctppcbinfo.iteratorhead); 4557 4558 /* init the hash table of endpoints */ 4559 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize); 4560 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize); 4561 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale); 4562 sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31), 4563 &sctppcbinfo.hashasocmark); 4564 sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize, 4565 &sctppcbinfo.hashmark); 4566 sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize, 4567 &sctppcbinfo.hashtcpmark); 4568 sctppcbinfo.hashtblsize = sctp_hashtblsize; 4569 4570 /* init the small hash table we use to track restarted asoc's */ 4571 sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, 4572 &sctppcbinfo.hashrestartmark); 4573 4574 4575 sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 4576 &sctppcbinfo.hashvrfmark); 4577 4578 sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 4579 &sctppcbinfo.vrf_ifn_hashmark); 4580 4581 /* init the zones */ 4582 /* 4583 * FIX ME: Should check for NULL returns, but if it does fail we are 4584 * doomed to panic anyways... add later maybe. 4585 */ 4586 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep", 4587 sizeof(struct sctp_inpcb), maxsockets); 4588 4589 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc", 4590 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 4591 4592 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr", 4593 sizeof(struct sctp_laddr), 4594 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 4595 4596 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr", 4597 sizeof(struct sctp_nets), 4598 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 4599 4600 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk", 4601 sizeof(struct sctp_tmit_chunk), 4602 (sctp_max_number_of_assoc * sctp_chunkscale)); 4603 4604 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq", 4605 sizeof(struct sctp_queued_to_read), 4606 (sctp_max_number_of_assoc * sctp_chunkscale)); 4607 4608 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out", 4609 sizeof(struct sctp_stream_queue_pending), 4610 (sctp_max_number_of_assoc * sctp_chunkscale)); 4611 4612 /* Master Lock INIT for info structure */ 4613 SCTP_INP_INFO_LOCK_INIT(); 4614 SCTP_STATLOG_INIT_LOCK(); 4615 SCTP_ITERATOR_LOCK_INIT(); 4616 4617 SCTP_IPI_COUNT_INIT(); 4618 SCTP_IPI_ADDR_INIT(); 4619 SCTP_IPI_ITERATOR_WQ_INIT(); 4620#ifdef SCTP_PACKET_LOGGING 4621 SCTP_IP_PKTLOG_INIT(); 4622#endif 4623 LIST_INIT(&sctppcbinfo.addr_wq); 4624 4625 /* not sure if we need all the counts */ 4626 sctppcbinfo.ipi_count_ep = 0; 4627 /* assoc/tcb zone info */ 4628 sctppcbinfo.ipi_count_asoc = 0; 4629 /* local addrlist zone info */ 4630 sctppcbinfo.ipi_count_laddr = 0; 4631 /* remote addrlist zone info */ 4632 sctppcbinfo.ipi_count_raddr = 0; 4633 /* chunk info */ 4634 sctppcbinfo.ipi_count_chunk = 0; 4635 4636 /* socket queue zone info */ 4637 sctppcbinfo.ipi_count_readq = 0; 4638 4639 /* stream out queue cont */ 4640 sctppcbinfo.ipi_count_strmoq = 0; 4641 4642 sctppcbinfo.ipi_free_strmoq = 0; 4643 sctppcbinfo.ipi_free_chunks = 0; 4644 4645 SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer); 4646 4647 /* Init the TIMEWAIT list */ 4648 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) { 4649 LIST_INIT(&sctppcbinfo.vtag_timewait[i]); 4650 } 4651 4652#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 4653 sctppcbinfo.iterator_running = 0; 4654 sctp_startup_iterator(); 4655#endif 4656 4657 /* 4658 * INIT the default VRF which for BSD is the only one, other O/S's 4659 * may have more. But initially they must start with one and then 4660 * add the VRF's as addresses are added. 4661 */ 4662 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 4663 4664} 4665 4666 4667int 4668sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 4669 int iphlen, int offset, int limit, struct sctphdr *sh, 4670 struct sockaddr *altsa) 4671{ 4672 /* 4673 * grub through the INIT pulling addresses and loading them to the 4674 * nets structure in the asoc. The from address in the mbuf should 4675 * also be loaded (if it is not already). This routine can be called 4676 * with either INIT or INIT-ACK's as long as the m points to the IP 4677 * packet and the offset points to the beginning of the parameters. 4678 */ 4679 struct sctp_inpcb *inp, *l_inp; 4680 struct sctp_nets *net, *net_tmp; 4681 struct ip *iph; 4682 struct sctp_paramhdr *phdr, parm_buf; 4683 struct sctp_tcb *stcb_tmp; 4684 uint16_t ptype, plen; 4685 struct sockaddr *sa; 4686 struct sockaddr_storage dest_store; 4687 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 4688 struct sockaddr_in sin; 4689 struct sockaddr_in6 sin6; 4690 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 4691 struct sctp_auth_random *p_random = NULL; 4692 uint16_t random_len = 0; 4693 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 4694 struct sctp_auth_hmac_algo *hmacs = NULL; 4695 uint16_t hmacs_len = 0; 4696 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 4697 struct sctp_auth_chunk_list *chunks = NULL; 4698 uint16_t num_chunks = 0; 4699 sctp_key_t *new_key; 4700 uint32_t keylen; 4701 int got_random = 0, got_hmacs = 0, got_chklist = 0; 4702 4703 /* First get the destination address setup too. */ 4704 memset(&sin, 0, sizeof(sin)); 4705 memset(&sin6, 0, sizeof(sin6)); 4706 4707 sin.sin_family = AF_INET; 4708 sin.sin_len = sizeof(sin); 4709 sin.sin_port = stcb->rport; 4710 4711 sin6.sin6_family = AF_INET6; 4712 sin6.sin6_len = sizeof(struct sockaddr_in6); 4713 sin6.sin6_port = stcb->rport; 4714 if (altsa == NULL) { 4715 iph = mtod(m, struct ip *); 4716 if (iph->ip_v == IPVERSION) { 4717 /* its IPv4 */ 4718 struct sockaddr_in *sin_2; 4719 4720 sin_2 = (struct sockaddr_in *)(local_sa); 4721 memset(sin_2, 0, sizeof(sin)); 4722 sin_2->sin_family = AF_INET; 4723 sin_2->sin_len = sizeof(sin); 4724 sin_2->sin_port = sh->dest_port; 4725 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 4726 sin.sin_addr = iph->ip_src; 4727 sa = (struct sockaddr *)&sin; 4728 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 4729 /* its IPv6 */ 4730 struct ip6_hdr *ip6; 4731 struct sockaddr_in6 *sin6_2; 4732 4733 ip6 = mtod(m, struct ip6_hdr *); 4734 sin6_2 = (struct sockaddr_in6 *)(local_sa); 4735 memset(sin6_2, 0, sizeof(sin6)); 4736 sin6_2->sin6_family = AF_INET6; 4737 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 4738 sin6_2->sin6_port = sh->dest_port; 4739 sin6.sin6_addr = ip6->ip6_src; 4740 sa = (struct sockaddr *)&sin6; 4741 } else { 4742 sa = NULL; 4743 } 4744 } else { 4745 /* 4746 * For cookies we use the src address NOT from the packet 4747 * but from the original INIT 4748 */ 4749 sa = altsa; 4750 } 4751 /* Turn off ECN until we get through all params */ 4752 stcb->asoc.ecn_allowed = 0; 4753 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4754 /* mark all addresses that we have currently on the list */ 4755 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 4756 } 4757 /* does the source address already exist? if so skip it */ 4758 l_inp = inp = stcb->sctp_ep; 4759 4760 atomic_add_int(&stcb->asoc.refcnt, 1); 4761 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 4762 atomic_add_int(&stcb->asoc.refcnt, -1); 4763 4764 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 4765 /* we must add the source address */ 4766 /* no scope set here since we have a tcb already. */ 4767 if ((sa->sa_family == AF_INET) && 4768 (stcb->asoc.ipv4_addr_legal)) { 4769 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 4770 return (-1); 4771 } 4772 } else if ((sa->sa_family == AF_INET6) && 4773 (stcb->asoc.ipv6_addr_legal)) { 4774 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 4775 return (-2); 4776 } 4777 } 4778 } else { 4779 if (net_tmp != NULL && stcb_tmp == stcb) { 4780 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 4781 } else if (stcb_tmp != stcb) { 4782 /* It belongs to another association? */ 4783 SCTP_TCB_UNLOCK(stcb_tmp); 4784 return (-3); 4785 } 4786 } 4787 if (stcb->asoc.state == 0) { 4788 /* the assoc was freed? */ 4789 return (-4); 4790 } 4791 /* now we must go through each of the params. */ 4792 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 4793 while (phdr) { 4794 ptype = ntohs(phdr->param_type); 4795 plen = ntohs(phdr->param_length); 4796 /* 4797 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 4798 * (int)plen); 4799 */ 4800 if (offset + plen > limit) { 4801 break; 4802 } 4803 if (plen == 0) { 4804 break; 4805 } 4806 if (ptype == SCTP_IPV4_ADDRESS) { 4807 if (stcb->asoc.ipv4_addr_legal) { 4808 struct sctp_ipv4addr_param *p4, p4_buf; 4809 4810 /* ok get the v4 address and check/add */ 4811 phdr = sctp_get_next_param(m, offset, 4812 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 4813 if (plen != sizeof(struct sctp_ipv4addr_param) || 4814 phdr == NULL) { 4815 return (-5); 4816 } 4817 p4 = (struct sctp_ipv4addr_param *)phdr; 4818 sin.sin_addr.s_addr = p4->addr; 4819 if (IN_MULTICAST(sin.sin_addr.s_addr)) { 4820 /* Skip multi-cast addresses */ 4821 goto next_param; 4822 } 4823 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 4824 (sin.sin_addr.s_addr == INADDR_ANY)) { 4825 goto next_param; 4826 } 4827 sa = (struct sockaddr *)&sin; 4828 inp = stcb->sctp_ep; 4829 atomic_add_int(&stcb->asoc.refcnt, 1); 4830 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 4831 local_sa, stcb); 4832 atomic_add_int(&stcb->asoc.refcnt, -1); 4833 4834 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 4835 inp == NULL) { 4836 /* we must add the source address */ 4837 /* 4838 * no scope set since we have a tcb 4839 * already 4840 */ 4841 4842 /* 4843 * we must validate the state again 4844 * here 4845 */ 4846 if (stcb->asoc.state == 0) { 4847 /* the assoc was freed? */ 4848 return (-7); 4849 } 4850 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 4851 return (-8); 4852 } 4853 } else if (stcb_tmp == stcb) { 4854 if (stcb->asoc.state == 0) { 4855 /* the assoc was freed? */ 4856 return (-10); 4857 } 4858 if (net != NULL) { 4859 /* clear flag */ 4860 net->dest_state &= 4861 ~SCTP_ADDR_NOT_IN_ASSOC; 4862 } 4863 } else { 4864 /* 4865 * strange, address is in another 4866 * assoc? straighten out locks. 4867 */ 4868 if (stcb->asoc.state == 0) { 4869 /* the assoc was freed? */ 4870 return (-12); 4871 } 4872 return (-13); 4873 } 4874 } 4875 } else if (ptype == SCTP_IPV6_ADDRESS) { 4876 if (stcb->asoc.ipv6_addr_legal) { 4877 /* ok get the v6 address and check/add */ 4878 struct sctp_ipv6addr_param *p6, p6_buf; 4879 4880 phdr = sctp_get_next_param(m, offset, 4881 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 4882 if (plen != sizeof(struct sctp_ipv6addr_param) || 4883 phdr == NULL) { 4884 return (-14); 4885 } 4886 p6 = (struct sctp_ipv6addr_param *)phdr; 4887 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 4888 sizeof(p6->addr)); 4889 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 4890 /* Skip multi-cast addresses */ 4891 goto next_param; 4892 } 4893 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 4894 /* 4895 * Link local make no sense without 4896 * scope 4897 */ 4898 goto next_param; 4899 } 4900 sa = (struct sockaddr *)&sin6; 4901 inp = stcb->sctp_ep; 4902 atomic_add_int(&stcb->asoc.refcnt, 1); 4903 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 4904 local_sa, stcb); 4905 atomic_add_int(&stcb->asoc.refcnt, -1); 4906 if (stcb_tmp == NULL && (inp == stcb->sctp_ep || 4907 inp == NULL)) { 4908 /* 4909 * we must validate the state again 4910 * here 4911 */ 4912 if (stcb->asoc.state == 0) { 4913 /* the assoc was freed? */ 4914 return (-16); 4915 } 4916 /* 4917 * we must add the address, no scope 4918 * set 4919 */ 4920 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 4921 return (-17); 4922 } 4923 } else if (stcb_tmp == stcb) { 4924 /* 4925 * we must validate the state again 4926 * here 4927 */ 4928 if (stcb->asoc.state == 0) { 4929 /* the assoc was freed? */ 4930 return (-19); 4931 } 4932 if (net != NULL) { 4933 /* clear flag */ 4934 net->dest_state &= 4935 ~SCTP_ADDR_NOT_IN_ASSOC; 4936 } 4937 } else { 4938 /* 4939 * strange, address is in another 4940 * assoc? straighten out locks. 4941 */ 4942 if (stcb->asoc.state == 0) { 4943 /* the assoc was freed? */ 4944 return (-21); 4945 } 4946 return (-22); 4947 } 4948 } 4949 } else if (ptype == SCTP_ECN_CAPABLE) { 4950 stcb->asoc.ecn_allowed = 1; 4951 } else if (ptype == SCTP_ULP_ADAPTATION) { 4952 if (stcb->asoc.state != SCTP_STATE_OPEN) { 4953 struct sctp_adaptation_layer_indication ai, 4954 *aip; 4955 4956 phdr = sctp_get_next_param(m, offset, 4957 (struct sctp_paramhdr *)&ai, sizeof(ai)); 4958 aip = (struct sctp_adaptation_layer_indication *)phdr; 4959 if (aip) { 4960 sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION, 4961 stcb, ntohl(aip->indication), NULL); 4962 } 4963 } 4964 } else if (ptype == SCTP_SET_PRIM_ADDR) { 4965 struct sctp_asconf_addr_param lstore, *fee; 4966 struct sctp_asconf_addrv4_param *fii; 4967 int lptype; 4968 struct sockaddr *lsa = NULL; 4969 4970 stcb->asoc.peer_supports_asconf = 1; 4971 if (plen > sizeof(lstore)) { 4972 return (-23); 4973 } 4974 phdr = sctp_get_next_param(m, offset, 4975 (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore))); 4976 if (phdr == NULL) { 4977 return (-24); 4978 } 4979 fee = (struct sctp_asconf_addr_param *)phdr; 4980 lptype = ntohs(fee->addrp.ph.param_type); 4981 if (lptype == SCTP_IPV4_ADDRESS) { 4982 if (plen != 4983 sizeof(struct sctp_asconf_addrv4_param)) { 4984 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 4985 (int)sizeof(struct sctp_asconf_addrv4_param), 4986 plen); 4987 } else { 4988 fii = (struct sctp_asconf_addrv4_param *)fee; 4989 sin.sin_addr.s_addr = fii->addrp.addr; 4990 lsa = (struct sockaddr *)&sin; 4991 } 4992 } else if (lptype == SCTP_IPV6_ADDRESS) { 4993 if (plen != 4994 sizeof(struct sctp_asconf_addr_param)) { 4995 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 4996 (int)sizeof(struct sctp_asconf_addr_param), 4997 plen); 4998 } else { 4999 memcpy(sin6.sin6_addr.s6_addr, 5000 fee->addrp.addr, 5001 sizeof(fee->addrp.addr)); 5002 lsa = (struct sockaddr *)&sin6; 5003 } 5004 } 5005 if (lsa) { 5006 (void)sctp_set_primary_addr(stcb, sa, NULL); 5007 } 5008 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 5009 /* Peer supports pr-sctp */ 5010 stcb->asoc.peer_supports_prsctp = 1; 5011 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 5012 /* A supported extension chunk */ 5013 struct sctp_supported_chunk_types_param *pr_supported; 5014 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 5015 int num_ent, i; 5016 5017 phdr = sctp_get_next_param(m, offset, 5018 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 5019 if (phdr == NULL) { 5020 return (-25); 5021 } 5022 stcb->asoc.peer_supports_asconf = 0; 5023 stcb->asoc.peer_supports_prsctp = 0; 5024 stcb->asoc.peer_supports_pktdrop = 0; 5025 stcb->asoc.peer_supports_strreset = 0; 5026 stcb->asoc.peer_supports_auth = 0; 5027 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 5028 num_ent = plen - sizeof(struct sctp_paramhdr); 5029 for (i = 0; i < num_ent; i++) { 5030 switch (pr_supported->chunk_types[i]) { 5031 case SCTP_ASCONF: 5032 case SCTP_ASCONF_ACK: 5033 stcb->asoc.peer_supports_asconf = 1; 5034 break; 5035 case SCTP_FORWARD_CUM_TSN: 5036 stcb->asoc.peer_supports_prsctp = 1; 5037 break; 5038 case SCTP_PACKET_DROPPED: 5039 stcb->asoc.peer_supports_pktdrop = 1; 5040 break; 5041 case SCTP_STREAM_RESET: 5042 stcb->asoc.peer_supports_strreset = 1; 5043 break; 5044 case SCTP_AUTHENTICATION: 5045 stcb->asoc.peer_supports_auth = 1; 5046 break; 5047 default: 5048 /* one I have not learned yet */ 5049 break; 5050 5051 } 5052 } 5053 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 5054 /* Peer supports ECN-nonce */ 5055 stcb->asoc.peer_supports_ecn_nonce = 1; 5056 stcb->asoc.ecn_nonce_allowed = 1; 5057 } else if (ptype == SCTP_RANDOM) { 5058 if (plen > sizeof(random_store)) 5059 break; 5060 if (got_random) { 5061 /* already processed a RANDOM */ 5062 goto next_param; 5063 } 5064 phdr = sctp_get_next_param(m, offset, 5065 (struct sctp_paramhdr *)random_store, 5066 min(sizeof(random_store), plen)); 5067 if (phdr == NULL) 5068 return (-26); 5069 p_random = (struct sctp_auth_random *)phdr; 5070 random_len = plen - sizeof(*p_random); 5071 /* enforce the random length */ 5072 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 5073 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 5074 return (-27); 5075 } 5076 got_random = 1; 5077 } else if (ptype == SCTP_HMAC_LIST) { 5078 int num_hmacs; 5079 int i; 5080 5081 if (plen > sizeof(hmacs_store)) 5082 break; 5083 if (got_hmacs) { 5084 /* already processed a HMAC list */ 5085 goto next_param; 5086 } 5087 phdr = sctp_get_next_param(m, offset, 5088 (struct sctp_paramhdr *)hmacs_store, 5089 min(plen, sizeof(hmacs_store))); 5090 if (phdr == NULL) 5091 return (-28); 5092 hmacs = (struct sctp_auth_hmac_algo *)phdr; 5093 hmacs_len = plen - sizeof(*hmacs); 5094 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 5095 /* validate the hmac list */ 5096 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 5097 return (-29); 5098 } 5099 if (stcb->asoc.peer_hmacs != NULL) 5100 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 5101 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 5102 if (stcb->asoc.peer_hmacs != NULL) { 5103 for (i = 0; i < num_hmacs; i++) { 5104 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 5105 ntohs(hmacs->hmac_ids[i])); 5106 } 5107 } 5108 got_hmacs = 1; 5109 } else if (ptype == SCTP_CHUNK_LIST) { 5110 int i; 5111 5112 if (plen > sizeof(chunks_store)) 5113 break; 5114 if (got_chklist) { 5115 /* already processed a Chunks list */ 5116 goto next_param; 5117 } 5118 phdr = sctp_get_next_param(m, offset, 5119 (struct sctp_paramhdr *)chunks_store, 5120 min(plen, sizeof(chunks_store))); 5121 if (phdr == NULL) 5122 return (-30); 5123 chunks = (struct sctp_auth_chunk_list *)phdr; 5124 num_chunks = plen - sizeof(*chunks); 5125 if (stcb->asoc.peer_auth_chunks != NULL) 5126 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 5127 else 5128 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 5129 for (i = 0; i < num_chunks; i++) { 5130 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 5131 stcb->asoc.peer_auth_chunks); 5132 } 5133 got_chklist = 1; 5134 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 5135 (ptype == SCTP_STATE_COOKIE) || 5136 (ptype == SCTP_UNRECOG_PARAM) || 5137 (ptype == SCTP_COOKIE_PRESERVE) || 5138 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 5139 (ptype == SCTP_ADD_IP_ADDRESS) || 5140 (ptype == SCTP_DEL_IP_ADDRESS) || 5141 (ptype == SCTP_ERROR_CAUSE_IND) || 5142 (ptype == SCTP_SUCCESS_REPORT)) { 5143 /* don't care */ ; 5144 } else { 5145 if ((ptype & 0x8000) == 0x0000) { 5146 /* 5147 * must stop processing the rest of the 5148 * param's. Any report bits were handled 5149 * with the call to 5150 * sctp_arethere_unrecognized_parameters() 5151 * when the INIT or INIT-ACK was first seen. 5152 */ 5153 break; 5154 } 5155 } 5156next_param: 5157 offset += SCTP_SIZE32(plen); 5158 if (offset >= limit) { 5159 break; 5160 } 5161 phdr = sctp_get_next_param(m, offset, &parm_buf, 5162 sizeof(parm_buf)); 5163 } 5164 /* Now check to see if we need to purge any addresses */ 5165 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { 5166 net_tmp = TAILQ_NEXT(net, sctp_next); 5167 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 5168 SCTP_ADDR_NOT_IN_ASSOC) { 5169 /* This address has been removed from the asoc */ 5170 /* remove and free it */ 5171 stcb->asoc.numnets--; 5172 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 5173 sctp_free_remote_addr(net); 5174 if (net == stcb->asoc.primary_destination) { 5175 stcb->asoc.primary_destination = NULL; 5176 sctp_select_primary_destination(stcb); 5177 } 5178 } 5179 } 5180 /* validate authentication required parameters */ 5181 if (got_random && got_hmacs) { 5182 stcb->asoc.peer_supports_auth = 1; 5183 } else { 5184 stcb->asoc.peer_supports_auth = 0; 5185 } 5186 if (!stcb->asoc.peer_supports_auth && got_chklist) { 5187 /* peer does not support auth but sent a chunks list? */ 5188 return (-31); 5189 } 5190 if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf && 5191 !stcb->asoc.peer_supports_auth) { 5192 /* peer supports asconf but not auth? */ 5193 return (-32); 5194 } 5195 /* concatenate the full random key */ 5196#ifdef SCTP_AUTH_DRAFT_04 5197 keylen = random_len; 5198 new_key = sctp_alloc_key(keylen); 5199 if (new_key != NULL) { 5200 /* copy in the RANDOM */ 5201 if (p_random != NULL) 5202 bcopy(p_random->random_data, new_key->key, random_len); 5203 } 5204#else 5205 keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks + 5206 sizeof(*hmacs) + hmacs_len; 5207 new_key = sctp_alloc_key(keylen); 5208 if (new_key != NULL) { 5209 /* copy in the RANDOM */ 5210 if (p_random != NULL) { 5211 keylen = sizeof(*p_random) + random_len; 5212 bcopy(p_random, new_key->key, keylen); 5213 } 5214 /* append in the AUTH chunks */ 5215 if (chunks != NULL) { 5216 bcopy(chunks, new_key->key + keylen, 5217 sizeof(*chunks) + num_chunks); 5218 keylen += sizeof(*chunks) + num_chunks; 5219 } 5220 /* append in the HMACs */ 5221 if (hmacs != NULL) { 5222 bcopy(hmacs, new_key->key + keylen, 5223 sizeof(*hmacs) + hmacs_len); 5224 } 5225 } 5226#endif 5227 else { 5228 /* failed to get memory for the key */ 5229 return (-33); 5230 } 5231 if (stcb->asoc.authinfo.peer_random != NULL) 5232 sctp_free_key(stcb->asoc.authinfo.peer_random); 5233 stcb->asoc.authinfo.peer_random = new_key; 5234#ifdef SCTP_AUTH_DRAFT_04 5235 /* don't include the chunks and hmacs for draft -04 */ 5236 stcb->asoc.authinfo.peer_random->keylen = random_len; 5237#endif 5238 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 5239 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 5240 5241 return (0); 5242} 5243 5244int 5245sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 5246 struct sctp_nets *net) 5247{ 5248 /* make sure the requested primary address exists in the assoc */ 5249 if (net == NULL && sa) 5250 net = sctp_findnet(stcb, sa); 5251 5252 if (net == NULL) { 5253 /* didn't find the requested primary address! */ 5254 return (-1); 5255 } else { 5256 /* set the primary address */ 5257 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 5258 /* Must be confirmed, so queue to set */ 5259 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 5260 return (0); 5261 } 5262 stcb->asoc.primary_destination = net; 5263 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 5264 net = TAILQ_FIRST(&stcb->asoc.nets); 5265 if (net != stcb->asoc.primary_destination) { 5266 /* 5267 * first one on the list is NOT the primary 5268 * sctp_cmpaddr() is much more efficent if the 5269 * primary is the first on the list, make it so. 5270 */ 5271 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 5272 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 5273 } 5274 return (0); 5275 } 5276} 5277 5278 5279int 5280sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now) 5281{ 5282 /* 5283 * This function serves two purposes. It will see if a TAG can be 5284 * re-used and return 1 for yes it is ok and 0 for don't use that 5285 * tag. A secondary function it will do is purge out old tags that 5286 * can be removed. 5287 */ 5288 struct sctpasochead *head; 5289 struct sctpvtaghead *chain; 5290 struct sctp_tagblock *twait_block; 5291 struct sctp_tcb *stcb; 5292 int i; 5293 5294 SCTP_INP_INFO_WLOCK(); 5295 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 5296 /* First is the vtag in use ? */ 5297 5298 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag, 5299 sctppcbinfo.hashasocmark)]; 5300 if (head == NULL) { 5301 goto check_restart; 5302 } 5303 LIST_FOREACH(stcb, head, sctp_asocs) { 5304 5305 if (stcb->asoc.my_vtag == tag) { 5306 /* 5307 * We should remove this if and return 0 always if 5308 * we want vtags unique across all endpoints. For 5309 * now within a endpoint is ok. 5310 */ 5311 if (inp == stcb->sctp_ep) { 5312 /* bad tag, in use */ 5313 SCTP_INP_INFO_WUNLOCK(); 5314 return (0); 5315 } 5316 } 5317 } 5318check_restart: 5319 /* Now lets check the restart hash */ 5320 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag, 5321 sctppcbinfo.hashrestartmark)]; 5322 if (head == NULL) { 5323 goto check_time_wait; 5324 } 5325 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { 5326 if (stcb->asoc.assoc_id == tag) { 5327 /* candidate */ 5328 if (inp == stcb->sctp_ep) { 5329 /* bad tag, in use */ 5330 SCTP_INP_INFO_WUNLOCK(); 5331 return (0); 5332 } 5333 } 5334 } 5335check_time_wait: 5336 /* Now what about timed wait ? */ 5337 if (!SCTP_LIST_EMPTY(chain)) { 5338 /* 5339 * Block(s) are present, lets see if we have this tag in the 5340 * list 5341 */ 5342 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5343 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 5344 if (twait_block->vtag_block[i].v_tag == 0) { 5345 /* not used */ 5346 continue; 5347 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire > 5348 now->tv_sec) { 5349 /* Audit expires this guy */ 5350 twait_block->vtag_block[i].tv_sec_at_expire = 0; 5351 twait_block->vtag_block[i].v_tag = 0; 5352 } else if (twait_block->vtag_block[i].v_tag == 5353 tag) { 5354 /* Bad tag, sorry :< */ 5355 SCTP_INP_INFO_WUNLOCK(); 5356 return (0); 5357 } 5358 } 5359 } 5360 } 5361 /* Not found, ok to use the tag */ 5362 SCTP_INP_INFO_WUNLOCK(); 5363 return (1); 5364} 5365 5366 5367static sctp_assoc_t reneged_asoc_ids[256]; 5368static uint8_t reneged_at = 0; 5369 5370 5371static void 5372sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 5373{ 5374 /* 5375 * We must hunt this association for MBUF's past the cumack (i.e. 5376 * out of order data that we can renege on). 5377 */ 5378 struct sctp_association *asoc; 5379 struct sctp_tmit_chunk *chk, *nchk; 5380 uint32_t cumulative_tsn_p1, tsn; 5381 struct sctp_queued_to_read *ctl, *nctl; 5382 int cnt, strmat, gap; 5383 5384 /* We look for anything larger than the cum-ack + 1 */ 5385 5386 SCTP_STAT_INCR(sctps_protocol_drain_calls); 5387 if (sctp_do_drain == 0) { 5388 return; 5389 } 5390 asoc = &stcb->asoc; 5391 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 5392 /* none we can reneg on. */ 5393 return; 5394 } 5395 SCTP_STAT_INCR(sctps_protocol_drains_done); 5396 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 5397 cnt = 0; 5398 /* First look in the re-assembly queue */ 5399 chk = TAILQ_FIRST(&asoc->reasmqueue); 5400 while (chk) { 5401 /* Get the next one */ 5402 nchk = TAILQ_NEXT(chk, sctp_next); 5403 if (compare_with_wrap(chk->rec.data.TSN_seq, 5404 cumulative_tsn_p1, MAX_TSN)) { 5405 /* Yep it is above cum-ack */ 5406 cnt++; 5407 tsn = chk->rec.data.TSN_seq; 5408 if (tsn >= asoc->mapping_array_base_tsn) { 5409 gap = tsn - asoc->mapping_array_base_tsn; 5410 } else { 5411 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 5412 tsn + 1; 5413 } 5414 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 5415 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 5416 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 5417 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5418 if (chk->data) { 5419 sctp_m_freem(chk->data); 5420 chk->data = NULL; 5421 } 5422 sctp_free_remote_addr(chk->whoTo); 5423 sctp_free_a_chunk(stcb, chk); 5424 } 5425 chk = nchk; 5426 } 5427 /* Ok that was fun, now we will drain all the inbound streams? */ 5428 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 5429 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); 5430 while (ctl) { 5431 nctl = TAILQ_NEXT(ctl, next); 5432 if (compare_with_wrap(ctl->sinfo_tsn, 5433 cumulative_tsn_p1, MAX_TSN)) { 5434 /* Yep it is above cum-ack */ 5435 cnt++; 5436 tsn = ctl->sinfo_tsn; 5437 if (tsn >= asoc->mapping_array_base_tsn) { 5438 gap = tsn - 5439 asoc->mapping_array_base_tsn; 5440 } else { 5441 gap = (MAX_TSN - 5442 asoc->mapping_array_base_tsn) + 5443 tsn + 1; 5444 } 5445 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 5446 sctp_ucount_decr(asoc->cnt_on_all_streams); 5447 5448 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, 5449 gap); 5450 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, 5451 ctl, next); 5452 if (ctl->data) { 5453 sctp_m_freem(ctl->data); 5454 ctl->data = NULL; 5455 } 5456 sctp_free_remote_addr(ctl->whoFrom); 5457 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); 5458 SCTP_DECR_READQ_COUNT(); 5459 } 5460 ctl = nctl; 5461 } 5462 } 5463 /* 5464 * Question, should we go through the delivery queue? The only 5465 * reason things are on here is the app not reading OR a p-d-api up. 5466 * An attacker COULD send enough in to initiate the PD-API and then 5467 * send a bunch of stuff to other streams... these would wind up on 5468 * the delivery queue.. and then we would not get to them. But in 5469 * order to do this I then have to back-track and un-deliver 5470 * sequence numbers in streams.. el-yucko. I think for now we will 5471 * NOT look at the delivery queue and leave it to be something to 5472 * consider later. An alternative would be to abort the P-D-API with 5473 * a notification and then deliver the data.... Or another method 5474 * might be to keep track of how many times the situation occurs and 5475 * if we see a possible attack underway just abort the association. 5476 */ 5477#ifdef SCTP_DEBUG 5478 if (cnt) { 5479 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 5480 } 5481#endif 5482 if (cnt) { 5483 /* 5484 * Now do we need to find a new 5485 * asoc->highest_tsn_inside_map? 5486 */ 5487 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) { 5488 gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn; 5489 } else { 5490 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 5491 asoc->highest_tsn_inside_map + 1; 5492 } 5493 if (gap >= (asoc->mapping_array_size << 3)) { 5494 /* 5495 * Something bad happened or cum-ack and high were 5496 * behind the base, but if so earlier checks should 5497 * have found NO data... wierd... we will start at 5498 * end of mapping array. 5499 */ 5500 SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n", 5501 (int)gap, 5502 (int)(asoc->mapping_array_size << 3), 5503 (int)asoc->highest_tsn_inside_map); 5504 gap = asoc->mapping_array_size << 3; 5505 } 5506 while (gap > 0) { 5507 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 5508 /* found the new highest */ 5509 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap; 5510 break; 5511 } 5512 gap--; 5513 } 5514 if (gap == 0) { 5515 /* Nothing left in map */ 5516 memset(asoc->mapping_array, 0, asoc->mapping_array_size); 5517 asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1; 5518 asoc->highest_tsn_inside_map = asoc->cumulative_tsn; 5519 } 5520 asoc->last_revoke_count = cnt; 5521 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 5522 sctp_send_sack(stcb); 5523 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN); 5524 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 5525 reneged_at++; 5526 } 5527 /* 5528 * Another issue, in un-setting the TSN's in the mapping array we 5529 * DID NOT adjust the higest_tsn marker. This will cause one of two 5530 * things to occur. It may cause us to do extra work in checking for 5531 * our mapping array movement. More importantly it may cause us to 5532 * SACK every datagram. This may not be a bad thing though since we 5533 * will recover once we get our cum-ack above and all this stuff we 5534 * dumped recovered. 5535 */ 5536} 5537 5538void 5539sctp_drain() 5540{ 5541 /* 5542 * We must walk the PCB lists for ALL associations here. The system 5543 * is LOW on MBUF's and needs help. This is where reneging will 5544 * occur. We really hope this does NOT happen! 5545 */ 5546 struct sctp_inpcb *inp; 5547 struct sctp_tcb *stcb; 5548 5549 SCTP_INP_INFO_RLOCK(); 5550 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 5551 /* For each endpoint */ 5552 SCTP_INP_RLOCK(inp); 5553 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5554 /* For each association */ 5555 SCTP_TCB_LOCK(stcb); 5556 sctp_drain_mbufs(inp, stcb); 5557 SCTP_TCB_UNLOCK(stcb); 5558 } 5559 SCTP_INP_RUNLOCK(inp); 5560 } 5561 SCTP_INP_INFO_RUNLOCK(); 5562} 5563 5564/* 5565 * start a new iterator 5566 * iterates through all endpoints and associations based on the pcb_state 5567 * flags and asoc_state. "af" (mandatory) is executed for all matching 5568 * assocs and "ef" (optional) is executed when the iterator completes. 5569 * "inpf" (optional) is executed for each new endpoint as it is being 5570 * iterated through. inpe (optional) is called when the inp completes 5571 * its way through all the stcbs. 5572 */ 5573int 5574sctp_initiate_iterator(inp_func inpf, 5575 asoc_func af, 5576 inp_func inpe, 5577 uint32_t pcb_state, 5578 uint32_t pcb_features, 5579 uint32_t asoc_state, 5580 void *argp, 5581 uint32_t argi, 5582 end_func ef, 5583 struct sctp_inpcb *s_inp, 5584 uint8_t chunk_output_off) 5585{ 5586 struct sctp_iterator *it = NULL; 5587 5588 if (af == NULL) { 5589 return (-1); 5590 } 5591 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 5592 SCTP_M_ITER); 5593 if (it == NULL) { 5594 return (ENOMEM); 5595 } 5596 memset(it, 0, sizeof(*it)); 5597 it->function_assoc = af; 5598 it->function_inp = inpf; 5599 if (inpf) 5600 it->done_current_ep = 0; 5601 else 5602 it->done_current_ep = 1; 5603 it->function_atend = ef; 5604 it->pointer = argp; 5605 it->val = argi; 5606 it->pcb_flags = pcb_state; 5607 it->pcb_features = pcb_features; 5608 it->asoc_state = asoc_state; 5609 it->function_inp_end = inpe; 5610 it->no_chunk_output = chunk_output_off; 5611 if (s_inp) { 5612 it->inp = s_inp; 5613 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 5614 } else { 5615 SCTP_INP_INFO_RLOCK(); 5616 it->inp = LIST_FIRST(&sctppcbinfo.listhead); 5617 5618 SCTP_INP_INFO_RUNLOCK(); 5619 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 5620 5621 } 5622 SCTP_IPI_ITERATOR_WQ_LOCK(); 5623 if (it->inp) { 5624 SCTP_INP_INCR_REF(it->inp); 5625 } 5626 TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr); 5627#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 5628 if (sctppcbinfo.iterator_running == 0) { 5629 sctp_wakeup_iterator(); 5630 } 5631 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5632#else 5633 if (it->inp) 5634 SCTP_INP_DECR_REF(it->inp); 5635 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5636 /* Init the timer */ 5637 SCTP_OS_TIMER_INIT(&it->tmr.timer); 5638 /* add to the list of all iterators */ 5639 sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it, 5640 NULL, NULL); 5641#endif 5642 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 5643 return (0); 5644} 5645