sctp_pcb.c revision 170642
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 170642 2007-06-13 01:31:53Z 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, 1278 uint32_t vrf_id) 1279{ 1280 struct sctp_inpcb *inp = NULL; 1281 struct sctp_tcb *retval; 1282 1283 SCTP_INP_INFO_RLOCK(); 1284 if (find_tcp_pool) { 1285 if (inp_p != NULL) { 1286 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1287 vrf_id); 1288 } else { 1289 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1290 vrf_id); 1291 } 1292 if (retval != NULL) { 1293 SCTP_INP_INFO_RUNLOCK(); 1294 return (retval); 1295 } 1296 } 1297 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1298 if (inp_p != NULL) { 1299 *inp_p = inp; 1300 } 1301 SCTP_INP_INFO_RUNLOCK(); 1302 1303 if (inp == NULL) { 1304 return (NULL); 1305 } 1306 /* 1307 * ok, we have an endpoint, now lets find the assoc for it (if any) 1308 * we now place the source address or from in the to of the find 1309 * endpoint call. Since in reality this chain is used from the 1310 * inbound packet side. 1311 */ 1312 if (inp_p != NULL) { 1313 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1314 NULL); 1315 } else { 1316 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1317 NULL); 1318 } 1319 return retval; 1320} 1321 1322 1323/* 1324 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1325 * find all addresses that the sender has specified in any address list. Each 1326 * address will be used to lookup the TCB and see if one exits. 1327 */ 1328static struct sctp_tcb * 1329sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1330 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1331 struct sockaddr *dest) 1332{ 1333 struct sockaddr_in sin4; 1334 struct sockaddr_in6 sin6; 1335 struct sctp_paramhdr *phdr, parm_buf; 1336 struct sctp_tcb *retval; 1337 uint32_t ptype, plen; 1338 1339 memset(&sin4, 0, sizeof(sin4)); 1340 memset(&sin6, 0, sizeof(sin6)); 1341 sin4.sin_len = sizeof(sin4); 1342 sin4.sin_family = AF_INET; 1343 sin4.sin_port = sh->src_port; 1344 sin6.sin6_len = sizeof(sin6); 1345 sin6.sin6_family = AF_INET6; 1346 sin6.sin6_port = sh->src_port; 1347 1348 retval = NULL; 1349 offset += sizeof(struct sctp_init_chunk); 1350 1351 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1352 while (phdr != NULL) { 1353 /* now we must see if we want the parameter */ 1354 ptype = ntohs(phdr->param_type); 1355 plen = ntohs(phdr->param_length); 1356 if (plen == 0) { 1357 break; 1358 } 1359 if (ptype == SCTP_IPV4_ADDRESS && 1360 plen == sizeof(struct sctp_ipv4addr_param)) { 1361 /* Get the rest of the address */ 1362 struct sctp_ipv4addr_param ip4_parm, *p4; 1363 1364 phdr = sctp_get_next_param(m, offset, 1365 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1366 if (phdr == NULL) { 1367 return (NULL); 1368 } 1369 p4 = (struct sctp_ipv4addr_param *)phdr; 1370 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 1371 /* look it up */ 1372 retval = sctp_findassociation_ep_addr(inp_p, 1373 (struct sockaddr *)&sin4, netp, dest, NULL); 1374 if (retval != NULL) { 1375 return (retval); 1376 } 1377 } else if (ptype == SCTP_IPV6_ADDRESS && 1378 plen == sizeof(struct sctp_ipv6addr_param)) { 1379 /* Get the rest of the address */ 1380 struct sctp_ipv6addr_param ip6_parm, *p6; 1381 1382 phdr = sctp_get_next_param(m, offset, 1383 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 1384 if (phdr == NULL) { 1385 return (NULL); 1386 } 1387 p6 = (struct sctp_ipv6addr_param *)phdr; 1388 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 1389 /* look it up */ 1390 retval = sctp_findassociation_ep_addr(inp_p, 1391 (struct sockaddr *)&sin6, netp, dest, NULL); 1392 if (retval != NULL) { 1393 return (retval); 1394 } 1395 } 1396 offset += SCTP_SIZE32(plen); 1397 phdr = sctp_get_next_param(m, offset, &parm_buf, 1398 sizeof(parm_buf)); 1399 } 1400 return (NULL); 1401} 1402 1403 1404static struct sctp_tcb * 1405sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag, 1406 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 1407 uint16_t lport, int skip_src_check) 1408{ 1409 /* 1410 * Use my vtag to hash. If we find it we then verify the source addr 1411 * is in the assoc. If all goes well we save a bit on rec of a 1412 * packet. 1413 */ 1414 struct sctpasochead *head; 1415 struct sctp_nets *net; 1416 struct sctp_tcb *stcb; 1417 1418 *netp = NULL; 1419 *inp_p = NULL; 1420 SCTP_INP_INFO_RLOCK(); 1421 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag, 1422 sctppcbinfo.hashasocmark)]; 1423 if (head == NULL) { 1424 /* invalid vtag */ 1425 SCTP_INP_INFO_RUNLOCK(); 1426 return (NULL); 1427 } 1428 LIST_FOREACH(stcb, head, sctp_asocs) { 1429 SCTP_INP_RLOCK(stcb->sctp_ep); 1430 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1431 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1432 continue; 1433 } 1434 SCTP_TCB_LOCK(stcb); 1435 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1436 if (stcb->asoc.my_vtag == vtag) { 1437 /* candidate */ 1438 if (stcb->rport != rport) { 1439 /* 1440 * we could remove this if vtags are unique 1441 * across the system. 1442 */ 1443 SCTP_TCB_UNLOCK(stcb); 1444 continue; 1445 } 1446 if (stcb->sctp_ep->sctp_lport != lport) { 1447 /* 1448 * we could remove this if vtags are unique 1449 * across the system. 1450 */ 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 if (skip_src_check) { 1455 *netp = NULL; /* unknown */ 1456 if (inp_p) 1457 *inp_p = stcb->sctp_ep; 1458 SCTP_INP_INFO_RUNLOCK(); 1459 return (stcb); 1460 } 1461 net = sctp_findnet(stcb, from); 1462 if (net) { 1463 /* yep its him. */ 1464 *netp = net; 1465 SCTP_STAT_INCR(sctps_vtagexpress); 1466 *inp_p = stcb->sctp_ep; 1467 SCTP_INP_INFO_RUNLOCK(); 1468 return (stcb); 1469 } else { 1470 /* 1471 * not him, this should only happen in rare 1472 * cases so I peg it. 1473 */ 1474 SCTP_STAT_INCR(sctps_vtagbogus); 1475 } 1476 } 1477 SCTP_TCB_UNLOCK(stcb); 1478 } 1479 SCTP_INP_INFO_RUNLOCK(); 1480 return (NULL); 1481} 1482 1483/* 1484 * Find an association with the pointer to the inbound IP packet. This can be 1485 * a IPv4 or IPv6 packet. 1486 */ 1487struct sctp_tcb * 1488sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 1489 struct sctphdr *sh, struct sctp_chunkhdr *ch, 1490 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 1491{ 1492 int find_tcp_pool; 1493 struct ip *iph; 1494 struct sctp_tcb *retval; 1495 struct sockaddr_storage to_store, from_store; 1496 struct sockaddr *to = (struct sockaddr *)&to_store; 1497 struct sockaddr *from = (struct sockaddr *)&from_store; 1498 struct sctp_inpcb *inp; 1499 1500 iph = mtod(m, struct ip *); 1501 if (iph->ip_v == IPVERSION) { 1502 /* its IPv4 */ 1503 struct sockaddr_in *from4; 1504 1505 from4 = (struct sockaddr_in *)&from_store; 1506 bzero(from4, sizeof(*from4)); 1507 from4->sin_family = AF_INET; 1508 from4->sin_len = sizeof(struct sockaddr_in); 1509 from4->sin_addr.s_addr = iph->ip_src.s_addr; 1510 from4->sin_port = sh->src_port; 1511 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1512 /* its IPv6 */ 1513 struct ip6_hdr *ip6; 1514 struct sockaddr_in6 *from6; 1515 1516 ip6 = mtod(m, struct ip6_hdr *); 1517 from6 = (struct sockaddr_in6 *)&from_store; 1518 bzero(from6, sizeof(*from6)); 1519 from6->sin6_family = AF_INET6; 1520 from6->sin6_len = sizeof(struct sockaddr_in6); 1521 from6->sin6_addr = ip6->ip6_src; 1522 from6->sin6_port = sh->src_port; 1523 /* Get the scopes in properly to the sin6 addr's */ 1524 /* we probably don't need these operations */ 1525 (void)sa6_recoverscope(from6); 1526 sa6_embedscope(from6, ip6_use_defzone); 1527 } else { 1528 /* Currently not supported. */ 1529 return (NULL); 1530 } 1531 if (sh->v_tag) { 1532 /* we only go down this path if vtag is non-zero */ 1533 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag), 1534 inp_p, netp, sh->src_port, sh->dest_port, 0); 1535 if (retval) { 1536 return (retval); 1537 } 1538 } 1539 if (iph->ip_v == IPVERSION) { 1540 /* its IPv4 */ 1541 struct sockaddr_in *to4; 1542 1543 to4 = (struct sockaddr_in *)&to_store; 1544 bzero(to4, sizeof(*to4)); 1545 to4->sin_family = AF_INET; 1546 to4->sin_len = sizeof(struct sockaddr_in); 1547 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 1548 to4->sin_port = sh->dest_port; 1549 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1550 /* its IPv6 */ 1551 struct ip6_hdr *ip6; 1552 struct sockaddr_in6 *to6; 1553 1554 ip6 = mtod(m, struct ip6_hdr *); 1555 to6 = (struct sockaddr_in6 *)&to_store; 1556 bzero(to6, sizeof(*to6)); 1557 to6->sin6_family = AF_INET6; 1558 to6->sin6_len = sizeof(struct sockaddr_in6); 1559 to6->sin6_addr = ip6->ip6_dst; 1560 to6->sin6_port = sh->dest_port; 1561 /* Get the scopes in properly to the sin6 addr's */ 1562 /* we probably don't need these operations */ 1563 (void)sa6_recoverscope(to6); 1564 sa6_embedscope(to6, ip6_use_defzone); 1565 } 1566 find_tcp_pool = 0; 1567 if ((ch->chunk_type != SCTP_INITIATION) && 1568 (ch->chunk_type != SCTP_INITIATION_ACK) && 1569 (ch->chunk_type != SCTP_COOKIE_ACK) && 1570 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 1571 /* Other chunk types go to the tcp pool. */ 1572 find_tcp_pool = 1; 1573 } 1574 if (inp_p) { 1575 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 1576 find_tcp_pool, vrf_id); 1577 inp = *inp_p; 1578 } else { 1579 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 1580 find_tcp_pool, vrf_id); 1581 } 1582 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 1583 if (retval == NULL && inp) { 1584 /* Found a EP but not this address */ 1585 if ((ch->chunk_type == SCTP_INITIATION) || 1586 (ch->chunk_type == SCTP_INITIATION_ACK)) { 1587 /*- 1588 * special hook, we do NOT return linp or an 1589 * association that is linked to an existing 1590 * association that is under the TCP pool (i.e. no 1591 * listener exists). The endpoint finding routine 1592 * will always find a listner before examining the 1593 * TCP pool. 1594 */ 1595 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 1596 if (inp_p) { 1597 *inp_p = NULL; 1598 } 1599 return (NULL); 1600 } 1601 retval = sctp_findassociation_special_addr(m, iphlen, 1602 offset, sh, &inp, netp, to); 1603 if (inp_p != NULL) { 1604 *inp_p = inp; 1605 } 1606 } 1607 } 1608 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 1609 return (retval); 1610} 1611 1612/* 1613 * lookup an association by an ASCONF lookup address. 1614 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 1615 */ 1616struct sctp_tcb * 1617sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 1618 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp) 1619{ 1620 struct sctp_tcb *stcb; 1621 struct sockaddr_in *sin; 1622 struct sockaddr_in6 *sin6; 1623 struct sockaddr_storage local_store, remote_store; 1624 struct ip *iph; 1625 struct sctp_paramhdr parm_buf, *phdr; 1626 int ptype; 1627 int zero_address = 0; 1628 1629 1630 memset(&local_store, 0, sizeof(local_store)); 1631 memset(&remote_store, 0, sizeof(remote_store)); 1632 1633 /* First get the destination address setup too. */ 1634 iph = mtod(m, struct ip *); 1635 if (iph->ip_v == IPVERSION) { 1636 /* its IPv4 */ 1637 sin = (struct sockaddr_in *)&local_store; 1638 sin->sin_family = AF_INET; 1639 sin->sin_len = sizeof(*sin); 1640 sin->sin_port = sh->dest_port; 1641 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 1642 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1643 /* its IPv6 */ 1644 struct ip6_hdr *ip6; 1645 1646 ip6 = mtod(m, struct ip6_hdr *); 1647 sin6 = (struct sockaddr_in6 *)&local_store; 1648 sin6->sin6_family = AF_INET6; 1649 sin6->sin6_len = sizeof(*sin6); 1650 sin6->sin6_port = sh->dest_port; 1651 sin6->sin6_addr = ip6->ip6_dst; 1652 } else { 1653 return NULL; 1654 } 1655 1656 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 1657 &parm_buf, sizeof(struct sctp_paramhdr)); 1658 if (phdr == NULL) { 1659 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 1660 __FUNCTION__); 1661 return NULL; 1662 } 1663 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 1664 /* get the correlation address */ 1665 if (ptype == SCTP_IPV6_ADDRESS) { 1666 /* ipv6 address param */ 1667 struct sctp_ipv6addr_param *p6, p6_buf; 1668 1669 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 1670 return NULL; 1671 } 1672 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 1673 offset + sizeof(struct sctp_asconf_chunk), 1674 &p6_buf.ph, sizeof(*p6)); 1675 if (p6 == NULL) { 1676 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 1677 __FUNCTION__); 1678 return (NULL); 1679 } 1680 sin6 = (struct sockaddr_in6 *)&remote_store; 1681 sin6->sin6_family = AF_INET6; 1682 sin6->sin6_len = sizeof(*sin6); 1683 sin6->sin6_port = sh->src_port; 1684 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 1685 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 1686 zero_address = 1; 1687 } else if (ptype == SCTP_IPV4_ADDRESS) { 1688 /* ipv4 address param */ 1689 struct sctp_ipv4addr_param *p4, p4_buf; 1690 1691 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 1692 return NULL; 1693 } 1694 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 1695 offset + sizeof(struct sctp_asconf_chunk), 1696 &p4_buf.ph, sizeof(*p4)); 1697 if (p4 == NULL) { 1698 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 1699 __FUNCTION__); 1700 return (NULL); 1701 } 1702 sin = (struct sockaddr_in *)&remote_store; 1703 sin->sin_family = AF_INET; 1704 sin->sin_len = sizeof(*sin); 1705 sin->sin_port = sh->src_port; 1706 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 1707 if (sin->sin_addr.s_addr == INADDR_ANY) 1708 zero_address = 1; 1709 } else { 1710 /* invalid address param type */ 1711 return NULL; 1712 } 1713 1714 if (zero_address) { 1715 stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p, 1716 netp, sh->src_port, sh->dest_port, 1); 1717 /* 1718 * printf("findassociation_ep_asconf: zero lookup address 1719 * finds stcb 0x%x\n", (uint32_t)stcb); 1720 */ 1721 } else { 1722 stcb = sctp_findassociation_ep_addr(inp_p, 1723 (struct sockaddr *)&remote_store, netp, 1724 (struct sockaddr *)&local_store, NULL); 1725 } 1726 return (stcb); 1727} 1728 1729 1730/* 1731 * allocate a sctp_inpcb and setup a temporary binding to a port/all 1732 * addresses. This way if we don't get a bind we by default pick a ephemeral 1733 * port with all addresses bound. 1734 */ 1735int 1736sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 1737{ 1738 /* 1739 * we get called when a new endpoint starts up. We need to allocate 1740 * the sctp_inpcb structure from the zone and init it. Mark it as 1741 * unbound and find a port that we can use as an ephemeral with 1742 * INADDR_ANY. If the user binds later no problem we can then add in 1743 * the specific addresses. And setup the default parameters for the 1744 * EP. 1745 */ 1746 int i, error; 1747 struct sctp_inpcb *inp; 1748 struct sctp_pcb *m; 1749 struct timeval time; 1750 sctp_sharedkey_t *null_key; 1751 1752 error = 0; 1753 1754 SCTP_INP_INFO_WLOCK(); 1755 inp = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep, struct sctp_inpcb); 1756 if (inp == NULL) { 1757 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 1758 SCTP_INP_INFO_WUNLOCK(); 1759 return (ENOBUFS); 1760 } 1761 /* zap it */ 1762 bzero(inp, sizeof(*inp)); 1763 1764 /* bump generations */ 1765 /* setup socket pointers */ 1766 inp->sctp_socket = so; 1767 inp->ip_inp.inp.inp_socket = so; 1768 1769 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 1770 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 1771 1772#ifdef IPSEC 1773 { 1774 struct inpcbpolicy *pcb_sp = NULL; 1775 1776 error = ipsec_init_pcbpolicy(so, &pcb_sp); 1777 /* Arrange to share the policy */ 1778 inp->ip_inp.inp.inp_sp = pcb_sp; 1779 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 1780 } 1781 if (error != 0) { 1782 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1783 SCTP_INP_INFO_WUNLOCK(); 1784 return error; 1785 } 1786#endif /* IPSEC */ 1787 SCTP_INCR_EP_COUNT(); 1788 inp->ip_inp.inp.inp_ip_ttl = ip_defttl; 1789 SCTP_INP_INFO_WUNLOCK(); 1790 1791 so->so_pcb = (caddr_t)inp; 1792 1793 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 1794 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 1795 /* UDP style socket */ 1796 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 1797 SCTP_PCB_FLAGS_UNBOUND); 1798 /* Be sure it is NON-BLOCKING IO for UDP */ 1799 /* SCTP_SET_SO_NBIO(so); */ 1800 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 1801 /* TCP style socket */ 1802 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 1803 SCTP_PCB_FLAGS_UNBOUND); 1804 /* Be sure we have blocking IO by default */ 1805 SCTP_CLEAR_SO_NBIO(so); 1806 } else { 1807 /* 1808 * unsupported socket type (RAW, etc)- in case we missed it 1809 * in protosw 1810 */ 1811 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1812 return (EOPNOTSUPP); 1813 } 1814 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 1815 1816 inp->sctp_tcbhash = SCTP_HASH_INIT(sctp_pcbtblsize, 1817 &inp->sctp_hashmark); 1818 if (inp->sctp_tcbhash == NULL) { 1819 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 1820 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1821 return (ENOBUFS); 1822 } 1823 inp->def_vrf_id = vrf_id; 1824 1825 SCTP_INP_INFO_WLOCK(); 1826 SCTP_INP_LOCK_INIT(inp); 1827 SCTP_INP_READ_INIT(inp); 1828 SCTP_ASOC_CREATE_LOCK_INIT(inp); 1829 /* lock the new ep */ 1830 SCTP_INP_WLOCK(inp); 1831 1832 /* add it to the info area */ 1833 LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list); 1834 SCTP_INP_INFO_WUNLOCK(); 1835 1836 TAILQ_INIT(&inp->read_queue); 1837 LIST_INIT(&inp->sctp_addr_list); 1838 1839 LIST_INIT(&inp->sctp_asoc_list); 1840 1841#ifdef SCTP_TRACK_FREED_ASOCS 1842 /* TEMP CODE */ 1843 LIST_INIT(&inp->sctp_asoc_free_list); 1844#endif 1845 /* Init the timer structure for signature change */ 1846 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 1847 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 1848 1849 /* now init the actual endpoint default data */ 1850 m = &inp->sctp_ep; 1851 1852 /* setup the base timeout information */ 1853 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 1854 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 1855 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default); 1856 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default); 1857 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default); 1858 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default); 1859 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default); 1860 /* all max/min max are in ms */ 1861 m->sctp_maxrto = sctp_rto_max_default; 1862 m->sctp_minrto = sctp_rto_min_default; 1863 m->initial_rto = sctp_rto_initial_default; 1864 m->initial_init_rto_max = sctp_init_rto_max_default; 1865 m->sctp_sack_freq = sctp_sack_freq_default; 1866 1867 m->max_open_streams_intome = MAX_SCTP_STREAMS; 1868 1869 m->max_init_times = sctp_init_rtx_max_default; 1870 m->max_send_times = sctp_assoc_rtx_max_default; 1871 m->def_net_failure = sctp_path_rtx_max_default; 1872 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 1873 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 1874 m->max_burst = sctp_max_burst_default; 1875 /* number of streams to pre-open on a association */ 1876 m->pre_open_stream_count = sctp_nr_outgoing_streams_default; 1877 1878 /* Add adaptation cookie */ 1879 m->adaptation_layer_indicator = 0x504C5253; 1880 1881 /* seed random number generator */ 1882 m->random_counter = 1; 1883 m->store_at = SCTP_SIGNATURE_SIZE; 1884 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 1885 sctp_fill_random_store(m); 1886 1887 /* Minimum cookie size */ 1888 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 1889 sizeof(struct sctp_state_cookie); 1890 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 1891 1892 /* Setup the initial secret */ 1893 (void)SCTP_GETTIME_TIMEVAL(&time); 1894 m->time_of_secret_change = time.tv_sec; 1895 1896 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 1897 m->secret_key[0][i] = sctp_select_initial_TSN(m); 1898 } 1899 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 1900 1901 /* How long is a cookie good for ? */ 1902 m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default); 1903 /* 1904 * Initialize authentication parameters 1905 */ 1906 m->local_hmacs = sctp_default_supported_hmaclist(); 1907 m->local_auth_chunks = sctp_alloc_chunklist(); 1908 sctp_auth_set_default_chunks(m->local_auth_chunks); 1909 LIST_INIT(&m->shared_keys); 1910 /* add default NULL key as key id 0 */ 1911 null_key = sctp_alloc_sharedkey(); 1912 sctp_insert_sharedkey(&m->shared_keys, null_key); 1913 SCTP_INP_WUNLOCK(inp); 1914#ifdef SCTP_LOG_CLOSING 1915 sctp_log_closing(inp, NULL, 12); 1916#endif 1917 return (error); 1918} 1919 1920 1921void 1922sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 1923 struct sctp_tcb *stcb) 1924{ 1925 struct sctp_nets *net; 1926 uint16_t lport, rport; 1927 struct sctppcbhead *head; 1928 struct sctp_laddr *laddr, *oladdr; 1929 1930 SCTP_TCB_UNLOCK(stcb); 1931 SCTP_INP_INFO_WLOCK(); 1932 SCTP_INP_WLOCK(old_inp); 1933 SCTP_INP_WLOCK(new_inp); 1934 SCTP_TCB_LOCK(stcb); 1935 1936 new_inp->sctp_ep.time_of_secret_change = 1937 old_inp->sctp_ep.time_of_secret_change; 1938 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 1939 sizeof(old_inp->sctp_ep.secret_key)); 1940 new_inp->sctp_ep.current_secret_number = 1941 old_inp->sctp_ep.current_secret_number; 1942 new_inp->sctp_ep.last_secret_number = 1943 old_inp->sctp_ep.last_secret_number; 1944 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 1945 1946 /* make it so new data pours into the new socket */ 1947 stcb->sctp_socket = new_inp->sctp_socket; 1948 stcb->sctp_ep = new_inp; 1949 1950 /* Copy the port across */ 1951 lport = new_inp->sctp_lport = old_inp->sctp_lport; 1952 rport = stcb->rport; 1953 /* Pull the tcb from the old association */ 1954 LIST_REMOVE(stcb, sctp_tcbhash); 1955 LIST_REMOVE(stcb, sctp_tcblist); 1956 1957 /* Now insert the new_inp into the TCP connected hash */ 1958 head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport), 1959 sctppcbinfo.hashtcpmark)]; 1960 1961 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 1962 /* Its safe to access */ 1963 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 1964 1965 /* Now move the tcb into the endpoint list */ 1966 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 1967 /* 1968 * Question, do we even need to worry about the ep-hash since we 1969 * only have one connection? Probably not :> so lets get rid of it 1970 * and not suck up any kernel memory in that. 1971 */ 1972 1973 /* Ok. Let's restart timer. */ 1974 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1975 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 1976 stcb, net); 1977 } 1978 1979 SCTP_INP_INFO_WUNLOCK(); 1980 if (new_inp->sctp_tcbhash != NULL) { 1981 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 1982 new_inp->sctp_tcbhash = NULL; 1983 } 1984 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1985 /* Subset bound, so copy in the laddr list from the old_inp */ 1986 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 1987 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 1988 if (laddr == NULL) { 1989 /* 1990 * Gak, what can we do? This assoc is really 1991 * HOSED. We probably should send an abort 1992 * here. 1993 */ 1994 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 1995 continue; 1996 } 1997 SCTP_INCR_LADDR_COUNT(); 1998 bzero(laddr, sizeof(*laddr)); 1999 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2000 laddr->ifa = oladdr->ifa; 2001 atomic_add_int(&laddr->ifa->refcount, 1); 2002 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2003 sctp_nxt_addr); 2004 new_inp->laddr_count++; 2005 } 2006 } 2007 /* 2008 * Now any running timers need to be adjusted since we really don't 2009 * care if they are running or not just blast in the new_inp into 2010 * all of them. 2011 */ 2012 2013 stcb->asoc.hb_timer.ep = (void *)new_inp; 2014 stcb->asoc.dack_timer.ep = (void *)new_inp; 2015 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2016 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2017 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2018 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2019 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2020 /* now what about the nets? */ 2021 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2022 net->pmtu_timer.ep = (void *)new_inp; 2023 net->rxt_timer.ep = (void *)new_inp; 2024 net->fr_timer.ep = (void *)new_inp; 2025 } 2026 SCTP_INP_WUNLOCK(new_inp); 2027 SCTP_INP_WUNLOCK(old_inp); 2028} 2029 2030static int 2031sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 2032{ 2033 struct sctppcbhead *head; 2034 struct sctp_inpcb *t_inp; 2035 int fnd; 2036 2037 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 2038 sctppcbinfo.hashmark)]; 2039 LIST_FOREACH(t_inp, head, sctp_hash) { 2040 if (t_inp->sctp_lport != lport) { 2041 continue; 2042 } 2043 /* is it in the VRF in question */ 2044 fnd = 0; 2045 if (t_inp->def_vrf_id == vrf_id) 2046 fnd = 1; 2047 if (!fnd) 2048 continue; 2049 2050 /* This one is in use. */ 2051 /* check the v6/v4 binding issue */ 2052 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2053 SCTP_IPV6_V6ONLY(t_inp)) { 2054 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2055 /* collision in V6 space */ 2056 return (1); 2057 } else { 2058 /* inp is BOUND_V4 no conflict */ 2059 continue; 2060 } 2061 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2062 /* t_inp is bound v4 and v6, conflict always */ 2063 return (1); 2064 } else { 2065 /* t_inp is bound only V4 */ 2066 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2067 SCTP_IPV6_V6ONLY(inp)) { 2068 /* no conflict */ 2069 continue; 2070 } 2071 /* else fall through to conflict */ 2072 } 2073 return (1); 2074 } 2075 return (0); 2076} 2077 2078 2079 2080int 2081sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, struct thread *p) 2082{ 2083 /* bind a ep to a socket address */ 2084 struct sctppcbhead *head; 2085 struct sctp_inpcb *inp, *inp_tmp; 2086 struct inpcb *ip_inp; 2087 int bindall; 2088 uint16_t lport; 2089 int error; 2090 uint32_t vrf_id; 2091 2092 lport = 0; 2093 error = 0; 2094 bindall = 1; 2095 inp = (struct sctp_inpcb *)so->so_pcb; 2096 ip_inp = (struct inpcb *)so->so_pcb; 2097#ifdef SCTP_DEBUG 2098 if (addr) { 2099 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2100 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2101 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2102 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2103 } 2104#endif 2105 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2106 /* already did a bind, subsequent binds NOT allowed ! */ 2107 return (EINVAL); 2108 } 2109 if (addr != NULL) { 2110 if (addr->sa_family == AF_INET) { 2111 struct sockaddr_in *sin; 2112 2113 /* IPV6_V6ONLY socket? */ 2114 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2115 return (EINVAL); 2116 } 2117 if (addr->sa_len != sizeof(*sin)) 2118 return (EINVAL); 2119 2120 sin = (struct sockaddr_in *)addr; 2121 lport = sin->sin_port; 2122 2123 if (sin->sin_addr.s_addr != INADDR_ANY) { 2124 bindall = 0; 2125 } 2126 } else if (addr->sa_family == AF_INET6) { 2127 /* Only for pure IPv6 Address. (No IPv4 Mapped!) */ 2128 struct sockaddr_in6 *sin6; 2129 2130 sin6 = (struct sockaddr_in6 *)addr; 2131 2132 if (addr->sa_len != sizeof(*sin6)) 2133 return (EINVAL); 2134 2135 lport = sin6->sin6_port; 2136 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2137 bindall = 0; 2138 /* KAME hack: embed scopeid */ 2139 if (sa6_embedscope(sin6, ip6_use_defzone) != 0) 2140 return (EINVAL); 2141 } 2142 /* this must be cleared for ifa_ifwithaddr() */ 2143 sin6->sin6_scope_id = 0; 2144 } else { 2145 return (EAFNOSUPPORT); 2146 } 2147 } 2148 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2149 vrf_id = inp->def_vrf_id; 2150 2151 SCTP_INP_INFO_WLOCK(); 2152 SCTP_INP_WLOCK(inp); 2153 /* increase our count due to the unlock we do */ 2154 SCTP_INP_INCR_REF(inp); 2155 if (lport) { 2156 /* 2157 * Did the caller specify a port? if so we must see if a ep 2158 * already has this one bound. 2159 */ 2160 /* got to be root to get at low ports */ 2161 if (ntohs(lport) < IPPORT_RESERVED) { 2162 if (p && (error = 2163 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2164 )) { 2165 SCTP_INP_DECR_REF(inp); 2166 SCTP_INP_WUNLOCK(inp); 2167 SCTP_INP_INFO_WUNLOCK(); 2168 return (error); 2169 } 2170 } 2171 if (p == NULL) { 2172 SCTP_INP_DECR_REF(inp); 2173 SCTP_INP_WUNLOCK(inp); 2174 SCTP_INP_INFO_WUNLOCK(); 2175 return (error); 2176 } 2177 SCTP_INP_WUNLOCK(inp); 2178 if (bindall) { 2179 vrf_id = inp->def_vrf_id; 2180 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2181 if (inp_tmp != NULL) { 2182 /* 2183 * lock guy returned and lower count note 2184 * that we are not bound so inp_tmp should 2185 * NEVER be inp. And it is this inp 2186 * (inp_tmp) that gets the reference bump, 2187 * so we must lower it. 2188 */ 2189 SCTP_INP_DECR_REF(inp_tmp); 2190 SCTP_INP_DECR_REF(inp); 2191 /* unlock info */ 2192 SCTP_INP_INFO_WUNLOCK(); 2193 return (EADDRINUSE); 2194 } 2195 } else { 2196 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2197 if (inp_tmp != NULL) { 2198 /* 2199 * lock guy returned and lower count note 2200 * that we are not bound so inp_tmp should 2201 * NEVER be inp. And it is this inp 2202 * (inp_tmp) that gets the reference bump, 2203 * so we must lower it. 2204 */ 2205 SCTP_INP_DECR_REF(inp_tmp); 2206 SCTP_INP_DECR_REF(inp); 2207 /* unlock info */ 2208 SCTP_INP_INFO_WUNLOCK(); 2209 return (EADDRINUSE); 2210 } 2211 } 2212 SCTP_INP_WLOCK(inp); 2213 if (bindall) { 2214 /* verify that no lport is not used by a singleton */ 2215 if (sctp_isport_inuse(inp, lport, vrf_id)) { 2216 /* Sorry someone already has this one bound */ 2217 SCTP_INP_DECR_REF(inp); 2218 SCTP_INP_WUNLOCK(inp); 2219 SCTP_INP_INFO_WUNLOCK(); 2220 return (EADDRINUSE); 2221 } 2222 } 2223 } else { 2224 uint16_t first, last, candidate; 2225 uint16_t count; 2226 int done; 2227 2228 if (ip_inp->inp_flags & INP_HIGHPORT) { 2229 first = ipport_hifirstauto; 2230 last = ipport_hilastauto; 2231 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2232 if (p && (error = 2233 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2234 )) { 2235 SCTP_INP_DECR_REF(inp); 2236 SCTP_INP_WUNLOCK(inp); 2237 SCTP_INP_INFO_WUNLOCK(); 2238 return (error); 2239 } 2240 first = ipport_lowfirstauto; 2241 last = ipport_lowlastauto; 2242 } else { 2243 first = ipport_firstauto; 2244 last = ipport_lastauto; 2245 } 2246 if (first > last) { 2247 uint16_t temp; 2248 2249 temp = first; 2250 first = last; 2251 last = temp; 2252 } 2253 count = last - first + 1; /* number of candidates */ 2254 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2255 2256 done = 0; 2257 while (!done) { 2258 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) { 2259 done = 1; 2260 } 2261 if (!done) { 2262 if (--count == 0) { 2263 SCTP_INP_DECR_REF(inp); 2264 SCTP_INP_WUNLOCK(inp); 2265 SCTP_INP_INFO_WUNLOCK(); 2266 return (EADDRINUSE); 2267 } 2268 if (candidate == last) 2269 candidate = first; 2270 else 2271 candidate = candidate + 1; 2272 } 2273 } 2274 lport = htons(candidate); 2275 } 2276 SCTP_INP_DECR_REF(inp); 2277 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2278 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2279 /* 2280 * this really should not happen. The guy did a non-blocking 2281 * bind and then did a close at the same time. 2282 */ 2283 SCTP_INP_WUNLOCK(inp); 2284 SCTP_INP_INFO_WUNLOCK(); 2285 return (EINVAL); 2286 } 2287 /* ok we look clear to give out this port, so lets setup the binding */ 2288 if (bindall) { 2289 /* binding to all addresses, so just set in the proper flags */ 2290 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2291 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2292 /* set the automatic addr changes from kernel flag */ 2293 if (sctp_auto_asconf == 0) { 2294 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2295 } else { 2296 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2297 } 2298 } else { 2299 /* 2300 * bind specific, make sure flags is off and add a new 2301 * address structure to the sctp_addr_list inside the ep 2302 * structure. 2303 * 2304 * We will need to allocate one and insert it at the head. The 2305 * socketopt call can just insert new addresses in there as 2306 * well. It will also have to do the embed scope kame hack 2307 * too (before adding). 2308 */ 2309 struct sctp_ifa *ifa; 2310 struct sockaddr_storage store_sa; 2311 2312 memset(&store_sa, 0, sizeof(store_sa)); 2313 if (addr->sa_family == AF_INET) { 2314 struct sockaddr_in *sin; 2315 2316 sin = (struct sockaddr_in *)&store_sa; 2317 memcpy(sin, addr, sizeof(struct sockaddr_in)); 2318 sin->sin_port = 0; 2319 } else if (addr->sa_family == AF_INET6) { 2320 struct sockaddr_in6 *sin6; 2321 2322 sin6 = (struct sockaddr_in6 *)&store_sa; 2323 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 2324 sin6->sin6_port = 0; 2325 } 2326 /* 2327 * first find the interface with the bound address need to 2328 * zero out the port to find the address! yuck! can't do 2329 * this earlier since need port for sctp_pcb_findep() 2330 */ 2331 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 2332 vrf_id, 0); 2333 if (ifa == NULL) { 2334 /* Can't find an interface with that address */ 2335 SCTP_INP_WUNLOCK(inp); 2336 SCTP_INP_INFO_WUNLOCK(); 2337 return (EADDRNOTAVAIL); 2338 } 2339 if (addr->sa_family == AF_INET6) { 2340 /* GAK, more FIXME IFA lock? */ 2341 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2342 /* Can't bind a non-existent addr. */ 2343 SCTP_INP_WUNLOCK(inp); 2344 SCTP_INP_INFO_WUNLOCK(); 2345 return (EINVAL); 2346 } 2347 } 2348 /* we're not bound all */ 2349 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 2350 /* allow bindx() to send ASCONF's for binding changes */ 2351 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2352 /* set the automatic addr changes from kernel flag */ 2353 if (sctp_auto_asconf == 0) { 2354 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2355 } else { 2356 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2357 } 2358 2359 /* add this address to the endpoint list */ 2360 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 2361 if (error != 0) { 2362 SCTP_INP_WUNLOCK(inp); 2363 SCTP_INP_INFO_WUNLOCK(); 2364 return (error); 2365 } 2366 inp->laddr_count++; 2367 } 2368 /* find the bucket */ 2369 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 2370 sctppcbinfo.hashmark)]; 2371 /* put it in the bucket */ 2372 LIST_INSERT_HEAD(head, inp, sctp_hash); 2373 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n", 2374 head, ntohs(lport)); 2375 /* set in the port */ 2376 inp->sctp_lport = lport; 2377 2378 /* turn off just the unbound flag */ 2379 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2380 SCTP_INP_WUNLOCK(inp); 2381 SCTP_INP_INFO_WUNLOCK(); 2382 return (0); 2383} 2384 2385 2386static void 2387sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next) 2388{ 2389 struct sctp_iterator *it; 2390 2391 /* 2392 * We enter with the only the ITERATOR_LOCK in place and a write 2393 * lock on the inp_info stuff. 2394 */ 2395 2396 /* 2397 * Go through all iterators, we must do this since it is possible 2398 * that some iterator does NOT have the lock, but is waiting for it. 2399 * And the one that had the lock has either moved in the last 2400 * iteration or we just cleared it above. We need to find all of 2401 * those guys. The list of iterators should never be very big 2402 * though. 2403 */ 2404 TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) { 2405 if (it == inp->inp_starting_point_for_iterator) 2406 /* skip this guy, he's special */ 2407 continue; 2408 if (it->inp == inp) { 2409 /* 2410 * This is tricky and we DON'T lock the iterator. 2411 * Reason is he's running but waiting for me since 2412 * inp->inp_starting_point_for_iterator has the lock 2413 * on me (the guy above we skipped). This tells us 2414 * its is not running but waiting for 2415 * inp->inp_starting_point_for_iterator to be 2416 * released by the guy that does have our INP in a 2417 * lock. 2418 */ 2419 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 2420 it->inp = NULL; 2421 it->stcb = NULL; 2422 } else { 2423 /* set him up to do the next guy not me */ 2424 it->inp = inp_next; 2425 it->stcb = NULL; 2426 } 2427 } 2428 } 2429 it = inp->inp_starting_point_for_iterator; 2430 if (it) { 2431 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 2432 it->inp = NULL; 2433 } else { 2434 it->inp = inp_next; 2435 } 2436 it->stcb = NULL; 2437 } 2438} 2439 2440/* release sctp_inpcb unbind the port */ 2441void 2442sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 2443{ 2444 /* 2445 * Here we free a endpoint. We must find it (if it is in the Hash 2446 * table) and remove it from there. Then we must also find it in the 2447 * overall list and remove it from there. After all removals are 2448 * complete then any timer has to be stopped. Then start the actual 2449 * freeing. a) Any local lists. b) Any associations. c) The hash of 2450 * all associations. d) finally the ep itself. 2451 */ 2452 struct sctp_pcb *m; 2453 struct sctp_inpcb *inp_save; 2454 struct sctp_tcb *asoc, *nasoc; 2455 struct sctp_laddr *laddr, *nladdr; 2456 struct inpcb *ip_pcb; 2457 struct socket *so; 2458 2459 struct sctp_queued_to_read *sq; 2460 2461 2462 int cnt; 2463 sctp_sharedkey_t *shared_key; 2464 2465 2466#ifdef SCTP_LOG_CLOSING 2467 sctp_log_closing(inp, NULL, 0); 2468#endif 2469 2470 SCTP_ITERATOR_LOCK(); 2471 so = inp->sctp_socket; 2472 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2473 /* been here before.. eeks.. get out of here */ 2474 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 2475 SCTP_ITERATOR_UNLOCK(); 2476#ifdef SCTP_LOG_CLOSING 2477 sctp_log_closing(inp, NULL, 1); 2478#endif 2479 return; 2480 } 2481 SCTP_ASOC_CREATE_LOCK(inp); 2482 SCTP_INP_INFO_WLOCK(); 2483 2484 SCTP_INP_WLOCK(inp); 2485 /* First time through we have the socket lock, after that no more. */ 2486 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 2487 /* 2488 * Once we are in we can remove the flag from = 1 is only 2489 * passed from the actual closing routines that are called 2490 * via the sockets layer. 2491 */ 2492 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 2493 } 2494 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 2495 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 2496 2497 if (inp->control) { 2498 sctp_m_freem(inp->control); 2499 inp->control = NULL; 2500 } 2501 if (inp->pkt) { 2502 sctp_m_freem(inp->pkt); 2503 inp->pkt = NULL; 2504 } 2505 m = &inp->sctp_ep; 2506 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 2507 * here but I will be nice :> (i.e. 2508 * ip_pcb = ep;) */ 2509 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 2510 int cnt_in_sd; 2511 2512 cnt_in_sd = 0; 2513 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 2514 asoc = nasoc) { 2515 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2516 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2517 /* Skip guys being freed */ 2518 asoc->sctp_socket = NULL; 2519 cnt_in_sd++; 2520 continue; 2521 } 2522 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 2523 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 2524 /* Just abandon things in the front states */ 2525 if (asoc->asoc.total_output_queue_size == 0) { 2526 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2); 2527 continue; 2528 } 2529 } 2530 SCTP_TCB_LOCK(asoc); 2531 /* Disconnect the socket please */ 2532 asoc->sctp_socket = NULL; 2533 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 2534 if ((asoc->asoc.size_on_reasm_queue > 0) || 2535 (asoc->asoc.control_pdapi) || 2536 (asoc->asoc.size_on_all_streams > 0) || 2537 (so && (so->so_rcv.sb_cc > 0)) 2538 ) { 2539 /* Left with Data unread */ 2540 struct mbuf *op_err; 2541 2542 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2543 0, M_DONTWAIT, 1, MT_DATA); 2544 if (op_err) { 2545 /* Fill in the user initiated abort */ 2546 struct sctp_paramhdr *ph; 2547 uint32_t *ippp; 2548 2549 SCTP_BUF_LEN(op_err) = 2550 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 2551 ph = mtod(op_err, 2552 struct sctp_paramhdr *); 2553 ph->param_type = htons( 2554 SCTP_CAUSE_USER_INITIATED_ABT); 2555 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2556 ippp = (uint32_t *) (ph + 1); 2557 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 2558 } 2559 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 2560 sctp_send_abort_tcb(asoc, op_err); 2561 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2562 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2563 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2564 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2565 } 2566 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4); 2567 continue; 2568 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 2569 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 2570 (asoc->asoc.stream_queue_cnt == 0) 2571 ) { 2572 if (asoc->asoc.locked_on_sending) { 2573 goto abort_anyway; 2574 } 2575 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 2576 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 2577 /* 2578 * there is nothing queued to send, 2579 * so I send shutdown 2580 */ 2581 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 2582 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2583 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2584 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2585 } 2586 asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT; 2587 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 2588 asoc->asoc.primary_destination); 2589 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 2590 asoc->asoc.primary_destination); 2591 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR); 2592 } 2593 } else { 2594 /* mark into shutdown pending */ 2595 struct sctp_stream_queue_pending *sp; 2596 2597 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 2598 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 2599 asoc->asoc.primary_destination); 2600 if (asoc->asoc.locked_on_sending) { 2601 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 2602 sctp_streamhead); 2603 if (sp == NULL) { 2604 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 2605 asoc->asoc.locked_on_sending, 2606 asoc->asoc.locked_on_sending->stream_no); 2607 } else { 2608 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 2609 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 2610 } 2611 } 2612 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 2613 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 2614 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 2615 struct mbuf *op_err; 2616 2617 abort_anyway: 2618 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2619 0, M_DONTWAIT, 1, MT_DATA); 2620 if (op_err) { 2621 /* 2622 * Fill in the user 2623 * initiated abort 2624 */ 2625 struct sctp_paramhdr *ph; 2626 uint32_t *ippp; 2627 2628 SCTP_BUF_LEN(op_err) = 2629 (sizeof(struct sctp_paramhdr) + 2630 sizeof(uint32_t)); 2631 ph = mtod(op_err, 2632 struct sctp_paramhdr *); 2633 ph->param_type = htons( 2634 SCTP_CAUSE_USER_INITIATED_ABT); 2635 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2636 ippp = (uint32_t *) (ph + 1); 2637 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 2638 } 2639 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 2640 sctp_send_abort_tcb(asoc, op_err); 2641 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2642 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2643 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2644 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2645 } 2646 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6); 2647 continue; 2648 } 2649 } 2650 cnt_in_sd++; 2651 SCTP_TCB_UNLOCK(asoc); 2652 } 2653 /* now is there some left in our SHUTDOWN state? */ 2654 if (cnt_in_sd) { 2655 SCTP_INP_WUNLOCK(inp); 2656 SCTP_ASOC_CREATE_UNLOCK(inp); 2657 SCTP_INP_INFO_WUNLOCK(); 2658 SCTP_ITERATOR_UNLOCK(); 2659#ifdef SCTP_LOG_CLOSING 2660 sctp_log_closing(inp, NULL, 2); 2661#endif 2662 return; 2663 } 2664 } 2665 inp->sctp_socket = NULL; 2666 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 2667 SCTP_PCB_FLAGS_UNBOUND) { 2668 /* 2669 * ok, this guy has been bound. It's port is somewhere in 2670 * the sctppcbinfo hash table. Remove it! 2671 */ 2672 LIST_REMOVE(inp, sctp_hash); 2673 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 2674 } 2675 /* 2676 * If there is a timer running to kill us, forget it, since it may 2677 * have a contest on the INP lock.. which would cause us to die ... 2678 */ 2679 cnt = 0; 2680 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 2681 asoc = nasoc) { 2682 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2683 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2684 cnt++; 2685 continue; 2686 } 2687 /* Free associations that are NOT killing us */ 2688 SCTP_TCB_LOCK(asoc); 2689 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 2690 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 2691 struct mbuf *op_err; 2692 uint32_t *ippp; 2693 2694 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2695 0, M_DONTWAIT, 1, MT_DATA); 2696 if (op_err) { 2697 /* Fill in the user initiated abort */ 2698 struct sctp_paramhdr *ph; 2699 2700 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 2701 sizeof(uint32_t)); 2702 ph = mtod(op_err, struct sctp_paramhdr *); 2703 ph->param_type = htons( 2704 SCTP_CAUSE_USER_INITIATED_ABT); 2705 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2706 ippp = (uint32_t *) (ph + 1); 2707 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 2708 2709 } 2710 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 2711 sctp_send_abort_tcb(asoc, op_err); 2712 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2713 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2714 cnt++; 2715 SCTP_TCB_UNLOCK(asoc); 2716 continue; 2717 } 2718 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2719 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2720 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2721 } 2722 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8); 2723 } 2724 if (cnt) { 2725 /* Ok we have someone out there that will kill us */ 2726 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2727 SCTP_INP_WUNLOCK(inp); 2728 SCTP_ASOC_CREATE_UNLOCK(inp); 2729 SCTP_INP_INFO_WUNLOCK(); 2730 SCTP_ITERATOR_UNLOCK(); 2731#ifdef SCTP_LOG_CLOSING 2732 sctp_log_closing(inp, NULL, 3); 2733#endif 2734 return; 2735 } 2736 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 2737 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2738 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 2739 SCTP_INP_WUNLOCK(inp); 2740 SCTP_ASOC_CREATE_UNLOCK(inp); 2741 SCTP_INP_INFO_WUNLOCK(); 2742 SCTP_ITERATOR_UNLOCK(); 2743#ifdef SCTP_LOG_CLOSING 2744 sctp_log_closing(inp, NULL, 4); 2745#endif 2746 return; 2747 } 2748 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2749 inp->sctp_ep.signature_change.type = 0; 2750 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 2751 2752#ifdef SCTP_LOG_CLOSING 2753 sctp_log_closing(inp, NULL, 5); 2754#endif 2755 2756 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2757 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE; 2758 /* Clear the read queue */ 2759 /* sa_ignore FREED_MEMORY */ 2760 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { 2761 /* Its only abandoned if it had data left */ 2762 if (sq->length) 2763 SCTP_STAT_INCR(sctps_left_abandon); 2764 2765 TAILQ_REMOVE(&inp->read_queue, sq, next); 2766 sctp_free_remote_addr(sq->whoFrom); 2767 if (so) 2768 so->so_rcv.sb_cc -= sq->length; 2769 if (sq->data) { 2770 sctp_m_freem(sq->data); 2771 sq->data = NULL; 2772 } 2773 /* 2774 * no need to free the net count, since at this point all 2775 * assoc's are gone. 2776 */ 2777 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); 2778 SCTP_DECR_READQ_COUNT(); 2779 } 2780 /* Now the sctp_pcb things */ 2781 /* 2782 * free each asoc if it is not already closed/free. we can't use the 2783 * macro here since le_next will get freed as part of the 2784 * sctp_free_assoc() call. 2785 */ 2786 cnt = 0; 2787 if (so) { 2788#ifdef IPSEC 2789 ipsec4_delete_pcbpolicy(ip_pcb); 2790#endif /* IPSEC */ 2791 2792 /* Unlocks not needed since the socket is gone now */ 2793 } 2794 if (ip_pcb->inp_options) { 2795 (void)sctp_m_free(ip_pcb->inp_options); 2796 ip_pcb->inp_options = 0; 2797 } 2798 if (ip_pcb->inp_moptions) { 2799 inp_freemoptions(ip_pcb->inp_moptions); 2800 ip_pcb->inp_moptions = 0; 2801 } 2802#ifdef INET6 2803 if (ip_pcb->inp_vflag & INP_IPV6) { 2804 struct in6pcb *in6p; 2805 2806 in6p = (struct in6pcb *)inp; 2807 ip6_freepcbopts(in6p->in6p_outputopts); 2808 } 2809#endif /* INET6 */ 2810 ip_pcb->inp_vflag = 0; 2811 /* free up authentication fields */ 2812 if (inp->sctp_ep.local_auth_chunks != NULL) 2813 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 2814 if (inp->sctp_ep.local_hmacs != NULL) 2815 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 2816 2817 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 2818 while (shared_key) { 2819 LIST_REMOVE(shared_key, next); 2820 sctp_free_sharedkey(shared_key); 2821 /* sa_ignore FREED_MEMORY */ 2822 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 2823 } 2824 2825 inp_save = LIST_NEXT(inp, sctp_list); 2826 LIST_REMOVE(inp, sctp_list); 2827 2828 /* fix any iterators only after out of the list */ 2829 sctp_iterator_inp_being_freed(inp, inp_save); 2830 /* 2831 * if we have an address list the following will free the list of 2832 * ifaddr's that are set into this ep. Again macro limitations here, 2833 * since the LIST_FOREACH could be a bad idea. 2834 */ 2835 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; 2836 laddr = nladdr) { 2837 nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 2838 sctp_remove_laddr(laddr); 2839 } 2840 2841#ifdef SCTP_TRACK_FREED_ASOCS 2842 /* TEMP CODE */ 2843 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; 2844 asoc = nasoc) { 2845 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2846 LIST_REMOVE(asoc, sctp_tcblist); 2847 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc); 2848 SCTP_DECR_ASOC_COUNT(); 2849 } 2850 /* *** END TEMP CODE *** */ 2851#endif 2852 /* Now lets see about freeing the EP hash table. */ 2853 if (inp->sctp_tcbhash != NULL) { 2854 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 2855 inp->sctp_tcbhash = NULL; 2856 } 2857 /* Now we must put the ep memory back into the zone pool */ 2858 SCTP_INP_LOCK_DESTROY(inp); 2859 SCTP_INP_READ_DESTROY(inp); 2860 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 2861 SCTP_INP_INFO_WUNLOCK(); 2862 2863 SCTP_ITERATOR_UNLOCK(); 2864 2865 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 2866 SCTP_DECR_EP_COUNT(); 2867 2868} 2869 2870 2871struct sctp_nets * 2872sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 2873{ 2874 struct sctp_nets *net; 2875 2876 /* locate the address */ 2877 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2878 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 2879 return (net); 2880 } 2881 return (NULL); 2882} 2883 2884 2885int 2886sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 2887{ 2888 struct sctp_ifa *sctp_ifa; 2889 2890 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0); 2891 if (sctp_ifa) { 2892 return (1); 2893 } else { 2894 return (0); 2895 } 2896} 2897 2898void 2899sctp_set_initial_cc_param(struct sctp_tcb *stcb, struct sctp_nets *net) 2900{ 2901 net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND)); 2902 /* we always get at LEAST 2 MTU's */ 2903 if (net->cwnd < (2 * net->mtu)) { 2904 net->cwnd = 2 * net->mtu; 2905 } 2906 net->ssthresh = stcb->asoc.peers_rwnd; 2907} 2908 2909 2910 2911/* 2912 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 2913 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 2914 * stats of stuff. 2915 */ 2916int 2917sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 2918 int set_scope, int from) 2919{ 2920 /* 2921 * The following is redundant to the same lines in the 2922 * sctp_aloc_assoc() but is needed since other's call the add 2923 * address function 2924 */ 2925 struct sctp_nets *net, *netfirst; 2926 int addr_inscope; 2927 2928 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 2929 from); 2930 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 2931 2932 netfirst = sctp_findnet(stcb, newaddr); 2933 if (netfirst) { 2934 /* 2935 * Lie and return ok, we don't want to make the association 2936 * go away for this behavior. It will happen in the TCP 2937 * model in a connected socket. It does not reach the hash 2938 * table until after the association is built so it can't be 2939 * found. Mark as reachable, since the initial creation will 2940 * have been cleared and the NOT_IN_ASSOC flag will have 2941 * been added... and we don't want to end up removing it 2942 * back out. 2943 */ 2944 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 2945 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 2946 SCTP_ADDR_UNCONFIRMED); 2947 } else { 2948 netfirst->dest_state = SCTP_ADDR_REACHABLE; 2949 } 2950 2951 return (0); 2952 } 2953 addr_inscope = 1; 2954 if (newaddr->sa_family == AF_INET) { 2955 struct sockaddr_in *sin; 2956 2957 sin = (struct sockaddr_in *)newaddr; 2958 if (sin->sin_addr.s_addr == 0) { 2959 /* Invalid address */ 2960 return (-1); 2961 } 2962 /* zero out the bzero area */ 2963 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 2964 2965 /* assure len is set */ 2966 sin->sin_len = sizeof(struct sockaddr_in); 2967 if (set_scope) { 2968#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 2969 stcb->ipv4_local_scope = 1; 2970#else 2971 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 2972 stcb->asoc.ipv4_local_scope = 1; 2973 } 2974#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 2975 } else { 2976 /* Validate the address is in scope */ 2977 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 2978 (stcb->asoc.ipv4_local_scope == 0)) { 2979 addr_inscope = 0; 2980 } 2981 } 2982 } else if (newaddr->sa_family == AF_INET6) { 2983 struct sockaddr_in6 *sin6; 2984 2985 sin6 = (struct sockaddr_in6 *)newaddr; 2986 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2987 /* Invalid address */ 2988 return (-1); 2989 } 2990 /* assure len is set */ 2991 sin6->sin6_len = sizeof(struct sockaddr_in6); 2992 if (set_scope) { 2993 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 2994 stcb->asoc.loopback_scope = 1; 2995 stcb->asoc.local_scope = 0; 2996 stcb->asoc.ipv4_local_scope = 1; 2997 stcb->asoc.site_scope = 1; 2998 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 2999 /* 3000 * If the new destination is a LINK_LOCAL we 3001 * must have common site scope. Don't set 3002 * the local scope since we may not share 3003 * all links, only loopback can do this. 3004 * Links on the local network would also be 3005 * on our private network for v4 too. 3006 */ 3007 stcb->asoc.ipv4_local_scope = 1; 3008 stcb->asoc.site_scope = 1; 3009 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3010 /* 3011 * If the new destination is SITE_LOCAL then 3012 * we must have site scope in common. 3013 */ 3014 stcb->asoc.site_scope = 1; 3015 } 3016 } else { 3017 /* Validate the address is in scope */ 3018 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3019 (stcb->asoc.loopback_scope == 0)) { 3020 addr_inscope = 0; 3021 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3022 (stcb->asoc.local_scope == 0)) { 3023 addr_inscope = 0; 3024 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3025 (stcb->asoc.site_scope == 0)) { 3026 addr_inscope = 0; 3027 } 3028 } 3029 } else { 3030 /* not supported family type */ 3031 return (-1); 3032 } 3033 net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets); 3034 if (net == NULL) { 3035 return (-1); 3036 } 3037 SCTP_INCR_RADDR_COUNT(); 3038 bzero(net, sizeof(*net)); 3039 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3040 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3041 if (newaddr->sa_family == AF_INET) { 3042 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3043 } else if (newaddr->sa_family == AF_INET6) { 3044 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3045 } 3046 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3047 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3048 stcb->asoc.loopback_scope = 1; 3049 stcb->asoc.ipv4_local_scope = 1; 3050 stcb->asoc.local_scope = 0; 3051 stcb->asoc.site_scope = 1; 3052 addr_inscope = 1; 3053 } 3054 net->failure_threshold = stcb->asoc.def_net_failure; 3055 if (addr_inscope == 0) { 3056 net->dest_state = (SCTP_ADDR_REACHABLE | 3057 SCTP_ADDR_OUT_OF_SCOPE); 3058 } else { 3059 if (from == SCTP_ADDR_IS_CONFIRMED) 3060 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3061 net->dest_state = SCTP_ADDR_REACHABLE; 3062 else 3063 net->dest_state = SCTP_ADDR_REACHABLE | 3064 SCTP_ADDR_UNCONFIRMED; 3065 } 3066 /* 3067 * We set this to 0, the timer code knows that this means its an 3068 * initial value 3069 */ 3070 net->RTO = 0; 3071 net->RTO_measured = 0; 3072 stcb->asoc.numnets++; 3073 *(&net->ref_count) = 1; 3074 net->tos_flowlabel = 0; 3075#ifdef INET 3076 if (newaddr->sa_family == AF_INET) 3077 net->tos_flowlabel = stcb->asoc.default_tos; 3078#endif 3079#ifdef INET6 3080 if (newaddr->sa_family == AF_INET6) 3081 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3082#endif 3083 /* Init the timer structure */ 3084 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3085 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3086 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3087 3088 /* Now generate a route for this guy */ 3089 /* KAME hack: embed scopeid */ 3090 if (newaddr->sa_family == AF_INET6) { 3091 struct sockaddr_in6 *sin6; 3092 3093 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3094 (void)sa6_embedscope(sin6, ip6_use_defzone); 3095 sin6->sin6_scope_id = 0; 3096 } 3097 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3098 3099 if (newaddr->sa_family == AF_INET6) { 3100 struct sockaddr_in6 *sin6; 3101 3102 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3103 (void)sa6_recoverscope(sin6); 3104 } 3105 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3106 /* Get source address */ 3107 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3108 stcb, 3109 (sctp_route_t *) & net->ro, 3110 net, 3111 0, 3112 stcb->asoc.vrf_id); 3113 /* Now get the interface MTU */ 3114 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3115 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3116 } else { 3117 net->mtu = 0; 3118 } 3119#ifdef SCTP_PRINT_FOR_B_AND_M 3120 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu); 3121#endif 3122 if (net->mtu == 0) { 3123 /* Huh ?? */ 3124 net->mtu = SCTP_DEFAULT_MTU; 3125 } else { 3126 uint32_t rmtu; 3127 3128 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3129#ifdef SCTP_PRINT_FOR_B_AND_M 3130 SCTP_PRINTF("The route mtu is %d\n", rmtu); 3131#endif 3132 if (rmtu == 0) { 3133 /* 3134 * Start things off to match mtu of 3135 * interface please. 3136 */ 3137 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3138 net->ro.ro_rt, net->mtu); 3139 } else { 3140 /* 3141 * we take the route mtu over the interface, 3142 * since the route may be leading out the 3143 * loopback, or a different interface. 3144 */ 3145 net->mtu = rmtu; 3146 } 3147 } 3148 if (from == SCTP_ALLOC_ASOC) { 3149#ifdef SCTP_PRINT_FOR_B_AND_M 3150 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu); 3151#endif 3152 stcb->asoc.smallest_mtu = net->mtu; 3153 } 3154 } else { 3155 net->mtu = stcb->asoc.smallest_mtu; 3156 } 3157 if (stcb->asoc.smallest_mtu > net->mtu) { 3158#ifdef SCTP_PRINT_FOR_B_AND_M 3159 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n", 3160 net->mtu, stcb->asoc.smallest_mtu); 3161#endif 3162 stcb->asoc.smallest_mtu = net->mtu; 3163 } 3164 /* 3165 * We take the max of the burst limit times a MTU or the 3166 * INITIAL_CWND. We then limit this to 4 MTU's of sending. 3167 */ 3168 sctp_set_initial_cc_param(stcb, net); 3169 3170 3171#if defined(SCTP_CWND_MONITOR) || defined(SCTP_CWND_LOGGING) 3172 sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION); 3173#endif 3174 3175 /* 3176 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3177 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3178 */ 3179 net->find_pseudo_cumack = 1; 3180 net->find_rtx_pseudo_cumack = 1; 3181 net->src_addr_selected = 0; 3182 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3183 if (net->ro.ro_rt == NULL) { 3184 /* Since we have no route put it at the back */ 3185 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3186 } else if (netfirst == NULL) { 3187 /* We are the first one in the pool. */ 3188 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3189 } else if (netfirst->ro.ro_rt == NULL) { 3190 /* 3191 * First one has NO route. Place this one ahead of the first 3192 * one. 3193 */ 3194 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3195 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3196 /* 3197 * This one has a different interface than the one at the 3198 * top of the list. Place it ahead. 3199 */ 3200 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3201 } else { 3202 /* 3203 * Ok we have the same interface as the first one. Move 3204 * forward until we find either a) one with a NULL route... 3205 * insert ahead of that b) one with a different ifp.. insert 3206 * after that. c) end of the list.. insert at the tail. 3207 */ 3208 struct sctp_nets *netlook; 3209 3210 do { 3211 netlook = TAILQ_NEXT(netfirst, sctp_next); 3212 if (netlook == NULL) { 3213 /* End of the list */ 3214 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3215 break; 3216 } else if (netlook->ro.ro_rt == NULL) { 3217 /* next one has NO route */ 3218 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 3219 break; 3220 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 3221 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 3222 net, sctp_next); 3223 break; 3224 } 3225 /* Shift forward */ 3226 netfirst = netlook; 3227 } while (netlook != NULL); 3228 } 3229 3230 /* got to have a primary set */ 3231 if (stcb->asoc.primary_destination == 0) { 3232 stcb->asoc.primary_destination = net; 3233 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 3234 (net->ro.ro_rt) && 3235 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 3236 /* No route to current primary adopt new primary */ 3237 stcb->asoc.primary_destination = net; 3238 } 3239 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 3240 net); 3241 /* Validate primary is first */ 3242 net = TAILQ_FIRST(&stcb->asoc.nets); 3243 if ((net != stcb->asoc.primary_destination) && 3244 (stcb->asoc.primary_destination)) { 3245 /* 3246 * first one on the list is NOT the primary sctp_cmpaddr() 3247 * is much more efficent if the primary is the first on the 3248 * list, make it so. 3249 */ 3250 TAILQ_REMOVE(&stcb->asoc.nets, 3251 stcb->asoc.primary_destination, sctp_next); 3252 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 3253 stcb->asoc.primary_destination, sctp_next); 3254 } 3255 return (0); 3256} 3257 3258 3259/* 3260 * allocate an association and add it to the endpoint. The caller must be 3261 * careful to add all additional addresses once they are know right away or 3262 * else the assoc will be may experience a blackout scenario. 3263 */ 3264struct sctp_tcb * 3265sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 3266 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id) 3267{ 3268 struct sctp_tcb *stcb; 3269 struct sctp_association *asoc; 3270 struct sctpasochead *head; 3271 uint16_t rport; 3272 int err; 3273 3274 /* 3275 * Assumption made here: Caller has done a 3276 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 3277 * address does not exist already. 3278 */ 3279 if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) { 3280 /* Hit max assoc, sorry no more */ 3281 *error = ENOBUFS; 3282 return (NULL); 3283 } 3284 if (firstaddr == NULL) { 3285 *error = EINVAL; 3286 return (NULL); 3287 } 3288 SCTP_INP_RLOCK(inp); 3289 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 3290 /* 3291 * If its in the TCP pool, its NOT allowed to create an 3292 * association. The parent listener needs to call 3293 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 3294 * off, or connected one does this.. its an error. 3295 */ 3296 SCTP_INP_RUNLOCK(inp); 3297 *error = EINVAL; 3298 return (NULL); 3299 } 3300 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 3301#ifdef SCTP_DEBUG 3302 if (firstaddr) { 3303 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 3304 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 3305 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 3306 } else { 3307 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 3308 } 3309#endif /* SCTP_DEBUG */ 3310 if (firstaddr->sa_family == AF_INET) { 3311 struct sockaddr_in *sin; 3312 3313 sin = (struct sockaddr_in *)firstaddr; 3314 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 3315 /* Invalid address */ 3316 SCTP_INP_RUNLOCK(inp); 3317 *error = EINVAL; 3318 return (NULL); 3319 } 3320 rport = sin->sin_port; 3321 } else if (firstaddr->sa_family == AF_INET6) { 3322 struct sockaddr_in6 *sin6; 3323 3324 sin6 = (struct sockaddr_in6 *)firstaddr; 3325 if ((sin6->sin6_port == 0) || 3326 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 3327 /* Invalid address */ 3328 SCTP_INP_RUNLOCK(inp); 3329 *error = EINVAL; 3330 return (NULL); 3331 } 3332 rport = sin6->sin6_port; 3333 } else { 3334 /* not supported family type */ 3335 SCTP_INP_RUNLOCK(inp); 3336 *error = EINVAL; 3337 return (NULL); 3338 } 3339 SCTP_INP_RUNLOCK(inp); 3340 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 3341 /* 3342 * If you have not performed a bind, then we need to do the 3343 * ephemerial bind for you. 3344 */ 3345 if ((err = sctp_inpcb_bind(inp->sctp_socket, 3346 (struct sockaddr *)NULL, 3347 (struct thread *)NULL 3348 ))) { 3349 /* bind error, probably perm */ 3350 *error = err; 3351 return (NULL); 3352 } 3353 } 3354 stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb); 3355 if (stcb == NULL) { 3356 /* out of memory? */ 3357 *error = ENOMEM; 3358 return (NULL); 3359 } 3360 SCTP_INCR_ASOC_COUNT(); 3361 3362 bzero(stcb, sizeof(*stcb)); 3363 asoc = &stcb->asoc; 3364 SCTP_TCB_LOCK_INIT(stcb); 3365 SCTP_TCB_SEND_LOCK_INIT(stcb); 3366 /* setup back pointer's */ 3367 stcb->sctp_ep = inp; 3368 stcb->sctp_socket = inp->sctp_socket; 3369 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) { 3370 /* failed */ 3371 SCTP_TCB_LOCK_DESTROY(stcb); 3372 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3373 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3374 SCTP_DECR_ASOC_COUNT(); 3375 *error = err; 3376 return (NULL); 3377 } 3378 /* and the port */ 3379 stcb->rport = rport; 3380 SCTP_INP_INFO_WLOCK(); 3381 SCTP_INP_WLOCK(inp); 3382 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3383 /* inpcb freed while alloc going on */ 3384 SCTP_TCB_LOCK_DESTROY(stcb); 3385 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3386 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3387 SCTP_INP_WUNLOCK(inp); 3388 SCTP_INP_INFO_WUNLOCK(); 3389 SCTP_DECR_ASOC_COUNT(); 3390 *error = EINVAL; 3391 return (NULL); 3392 } 3393 SCTP_TCB_LOCK(stcb); 3394 3395 /* now that my_vtag is set, add it to the hash */ 3396 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, 3397 sctppcbinfo.hashasocmark)]; 3398 /* put it in the bucket in the vtag hash of assoc's for the system */ 3399 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 3400 SCTP_INP_INFO_WUNLOCK(); 3401 3402 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 3403 /* failure.. memory error? */ 3404 if (asoc->strmout) { 3405 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 3406 asoc->strmout = NULL; 3407 } 3408 if (asoc->mapping_array) { 3409 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 3410 asoc->mapping_array = NULL; 3411 } 3412 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3413 SCTP_DECR_ASOC_COUNT(); 3414 SCTP_TCB_LOCK_DESTROY(stcb); 3415 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3416 SCTP_INP_WUNLOCK(inp); 3417 *error = ENOBUFS; 3418 return (NULL); 3419 } 3420 /* Init all the timers */ 3421 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 3422 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 3423 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 3424 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 3425 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 3426 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 3427 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 3428 3429 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 3430 /* now file the port under the hash as well */ 3431 if (inp->sctp_tcbhash != NULL) { 3432 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 3433 inp->sctp_hashmark)]; 3434 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 3435 } 3436 SCTP_INP_WUNLOCK(inp); 3437 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 3438 return (stcb); 3439} 3440 3441 3442void 3443sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 3444{ 3445 struct sctp_association *asoc; 3446 3447 asoc = &stcb->asoc; 3448 asoc->numnets--; 3449 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 3450 if (net == asoc->primary_destination) { 3451 /* Reset primary */ 3452 struct sctp_nets *lnet; 3453 3454 lnet = TAILQ_FIRST(&asoc->nets); 3455 /* Try to find a confirmed primary */ 3456 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 3457 } 3458 if (net == asoc->last_data_chunk_from) { 3459 /* Reset primary */ 3460 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 3461 } 3462 if (net == asoc->last_control_chunk_from) { 3463 /* Clear net */ 3464 asoc->last_control_chunk_from = NULL; 3465 } 3466 sctp_free_remote_addr(net); 3467} 3468 3469/* 3470 * remove a remote endpoint address from an association, it will fail if the 3471 * address does not exist. 3472 */ 3473int 3474sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 3475{ 3476 /* 3477 * Here we need to remove a remote address. This is quite simple, we 3478 * first find it in the list of address for the association 3479 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 3480 * on that item. Note we do not allow it to be removed if there are 3481 * no other addresses. 3482 */ 3483 struct sctp_association *asoc; 3484 struct sctp_nets *net, *net_tmp; 3485 3486 asoc = &stcb->asoc; 3487 3488 /* locate the address */ 3489 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { 3490 net_tmp = TAILQ_NEXT(net, sctp_next); 3491 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 3492 continue; 3493 } 3494 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 3495 remaddr)) { 3496 /* we found the guy */ 3497 if (asoc->numnets < 2) { 3498 /* Must have at LEAST two remote addresses */ 3499 return (-1); 3500 } else { 3501 sctp_remove_net(stcb, net); 3502 return (0); 3503 } 3504 } 3505 } 3506 /* not found. */ 3507 return (-2); 3508} 3509 3510 3511void 3512sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time) 3513{ 3514 struct sctpvtaghead *chain; 3515 struct sctp_tagblock *twait_block; 3516 struct timeval now; 3517 int set, i; 3518 3519 (void)SCTP_GETTIME_TIMEVAL(&now); 3520 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 3521 set = 0; 3522 if (!SCTP_LIST_EMPTY(chain)) { 3523 /* Block(s) present, lets find space, and expire on the fly */ 3524 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 3525 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 3526 if ((twait_block->vtag_block[i].v_tag == 0) && 3527 !set) { 3528 twait_block->vtag_block[i].tv_sec_at_expire = 3529 now.tv_sec + time; 3530 twait_block->vtag_block[i].v_tag = tag; 3531 set = 1; 3532 } else if ((twait_block->vtag_block[i].v_tag) && 3533 ((long)twait_block->vtag_block[i].tv_sec_at_expire > 3534 now.tv_sec)) { 3535 /* Audit expires this guy */ 3536 twait_block->vtag_block[i].tv_sec_at_expire = 0; 3537 twait_block->vtag_block[i].v_tag = 0; 3538 if (set == 0) { 3539 /* Reuse it for my new tag */ 3540 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT; 3541 twait_block->vtag_block[0].v_tag = tag; 3542 set = 1; 3543 } 3544 } 3545 } 3546 if (set) { 3547 /* 3548 * We only do up to the block where we can 3549 * place our tag for audits 3550 */ 3551 break; 3552 } 3553 } 3554 } 3555 /* Need to add a new block to chain */ 3556 if (!set) { 3557 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 3558 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 3559 if (twait_block == NULL) { 3560 return; 3561 } 3562 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 3563 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 3564 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + 3565 SCTP_TIME_WAIT; 3566 twait_block->vtag_block[0].v_tag = tag; 3567 } 3568} 3569 3570 3571static void 3572sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 3573{ 3574 struct sctp_iterator *it; 3575 3576 /* 3577 * Unlock the tcb lock we do this so we avoid a dead lock scenario 3578 * where the iterator is waiting on the TCB lock and the TCB lock is 3579 * waiting on the iterator lock. 3580 */ 3581 it = stcb->asoc.stcb_starting_point_for_iterator; 3582 if (it == NULL) { 3583 return; 3584 } 3585 if (it->inp != stcb->sctp_ep) { 3586 /* hmm, focused on the wrong one? */ 3587 return; 3588 } 3589 if (it->stcb != stcb) { 3590 return; 3591 } 3592 it->stcb = LIST_NEXT(stcb, sctp_tcblist); 3593 if (it->stcb == NULL) { 3594 /* done with all asoc's in this assoc */ 3595 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3596 it->inp = NULL; 3597 } else { 3598 it->inp = LIST_NEXT(inp, sctp_list); 3599 } 3600 } 3601} 3602 3603 3604/* 3605 * Free the association after un-hashing the remote port. 3606 */ 3607int 3608sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 3609{ 3610 int i; 3611 struct sctp_association *asoc; 3612 struct sctp_nets *net, *prev; 3613 struct sctp_laddr *laddr; 3614 struct sctp_tmit_chunk *chk; 3615 struct sctp_asconf_addr *aparam; 3616 struct sctp_stream_reset_list *liste; 3617 struct sctp_queued_to_read *sq; 3618 struct sctp_stream_queue_pending *sp; 3619 sctp_sharedkey_t *shared_key; 3620 struct socket *so; 3621 int ccnt = 0; 3622 int cnt = 0; 3623 3624 /* first, lets purge the entry from the hash table. */ 3625 3626#ifdef SCTP_LOG_CLOSING 3627 sctp_log_closing(inp, stcb, 6); 3628#endif 3629 if (stcb->asoc.state == 0) { 3630#ifdef SCTP_LOG_CLOSING 3631 sctp_log_closing(inp, NULL, 7); 3632#endif 3633 /* there is no asoc, really TSNH :-0 */ 3634 return (1); 3635 } 3636 /* TEMP CODE */ 3637 if (stcb->freed_from_where == 0) { 3638 /* Only record the first place free happened from */ 3639 stcb->freed_from_where = from_location; 3640 } 3641 /* TEMP CODE */ 3642 3643 asoc = &stcb->asoc; 3644 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3645 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3646 /* nothing around */ 3647 so = NULL; 3648 else 3649 so = inp->sctp_socket; 3650 3651 /* 3652 * We used timer based freeing if a reader or writer is in the way. 3653 * So we first check if we are actually being called from a timer, 3654 * if so we abort early if a reader or writer is still in the way. 3655 */ 3656 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 3657 (from_inpcbfree == SCTP_NORMAL_PROC)) { 3658 /* 3659 * is it the timer driving us? if so are the reader/writers 3660 * gone? 3661 */ 3662 if (stcb->asoc.refcnt) { 3663 /* nope, reader or writer in the way */ 3664 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3665 /* no asoc destroyed */ 3666 SCTP_TCB_UNLOCK(stcb); 3667#ifdef SCTP_LOG_CLOSING 3668 sctp_log_closing(inp, stcb, 8); 3669#endif 3670 return (0); 3671 } 3672 } 3673 /* now clean up any other timers */ 3674 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 3675 asoc->hb_timer.self = NULL; 3676 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 3677 asoc->dack_timer.self = NULL; 3678 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3679 /*- 3680 * For stream reset we don't blast this unless 3681 * it is a str-reset timer, it might be the 3682 * free-asoc timer which we DON'T want to 3683 * disturb. 3684 */ 3685 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 3686 asoc->strreset_timer.self = NULL; 3687 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 3688 asoc->asconf_timer.self = NULL; 3689 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 3690 asoc->autoclose_timer.self = NULL; 3691 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 3692 asoc->shut_guard_timer.self = NULL; 3693 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 3694 asoc->delayed_event_timer.self = NULL; 3695 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 3696 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 3697 net->fr_timer.self = NULL; 3698 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 3699 net->rxt_timer.self = NULL; 3700 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 3701 net->pmtu_timer.self = NULL; 3702 } 3703 /* Now the read queue needs to be cleaned up (only once) */ 3704 cnt = 0; 3705 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 3706 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 3707 SCTP_INP_READ_LOCK(inp); 3708 TAILQ_FOREACH(sq, &inp->read_queue, next) { 3709 if (sq->stcb == stcb) { 3710 sq->do_not_ref_stcb = 1; 3711 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 3712 /* 3713 * If there is no end, there never will be 3714 * now. 3715 */ 3716 if (sq->end_added == 0) { 3717 /* Held for PD-API clear that. */ 3718 sq->pdapi_aborted = 1; 3719 sq->held_length = 0; 3720 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) { 3721 /* 3722 * Need to add a PD-API 3723 * aborted indication. 3724 * Setting the control_pdapi 3725 * assures that it will be 3726 * added right after this 3727 * msg. 3728 */ 3729 uint32_t strseq; 3730 3731 stcb->asoc.control_pdapi = sq; 3732 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 3733 sctp_notify_partial_delivery_indication(stcb, 3734 SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq); 3735 stcb->asoc.control_pdapi = NULL; 3736 } 3737 } 3738 /* Add an end to wake them */ 3739 sq->end_added = 1; 3740 cnt++; 3741 } 3742 } 3743 SCTP_INP_READ_UNLOCK(inp); 3744 if (stcb->block_entry) { 3745 cnt++; 3746 stcb->block_entry->error = ECONNRESET; 3747 stcb->block_entry = NULL; 3748 } 3749 } 3750 if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) { 3751 /* 3752 * reader or writer in the way, we have hopefully given him 3753 * something to chew on above. 3754 */ 3755 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3756 SCTP_TCB_UNLOCK(stcb); 3757 if (so) { 3758 SCTP_INP_RLOCK(inp); 3759 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3760 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3761 /* nothing around */ 3762 so = NULL; 3763 if (so) { 3764 /* Wake any reader/writers */ 3765 sctp_sorwakeup(inp, so); 3766 sctp_sowwakeup(inp, so); 3767 } 3768 SCTP_INP_RUNLOCK(inp); 3769 3770 } 3771#ifdef SCTP_LOG_CLOSING 3772 sctp_log_closing(inp, stcb, 9); 3773#endif 3774 /* no asoc destroyed */ 3775 return (0); 3776 } 3777#ifdef SCTP_LOG_CLOSING 3778 sctp_log_closing(inp, stcb, 10); 3779#endif 3780 /* 3781 * When I reach here, no others want to kill the assoc yet.. and I 3782 * own the lock. Now its possible an abort comes in when I do the 3783 * lock exchange below to grab all the locks to do the final take 3784 * out. to prevent this we increment the count, which will start a 3785 * timer and blow out above thus assuring us that we hold exclusive 3786 * killing of the asoc. Note that after getting back the TCB lock we 3787 * will go ahead and increment the counter back up and stop any 3788 * timer a passing stranger may have started :-S 3789 */ 3790 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3791 atomic_add_int(&stcb->asoc.refcnt, 1); 3792 3793 SCTP_TCB_UNLOCK(stcb); 3794 3795 SCTP_ITERATOR_LOCK(); 3796 SCTP_INP_INFO_WLOCK(); 3797 SCTP_INP_WLOCK(inp); 3798 SCTP_TCB_LOCK(stcb); 3799 } 3800 /* Double check the GONE flag */ 3801 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3802 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3803 /* nothing around */ 3804 so = NULL; 3805 3806 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 3807 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 3808 /* 3809 * For TCP type we need special handling when we are 3810 * connected. We also include the peel'ed off ones to. 3811 */ 3812 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 3813 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 3814 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 3815 if (so) { 3816 SOCK_LOCK(so); 3817 if (so->so_rcv.sb_cc == 0) { 3818 so->so_state &= ~(SS_ISCONNECTING | 3819 SS_ISDISCONNECTING | 3820 SS_ISCONFIRMING | 3821 SS_ISCONNECTED); 3822 } 3823 SOCK_UNLOCK(so); 3824 sctp_sowwakeup(inp, so); 3825 sctp_sorwakeup(inp, so); 3826 SCTP_SOWAKEUP(so); 3827 } 3828 } 3829 } 3830 /* 3831 * Make it invalid too, that way if its about to run it will abort 3832 * and return. 3833 */ 3834 sctp_iterator_asoc_being_freed(inp, stcb); 3835 /* re-increment the lock */ 3836 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3837 atomic_add_int(&stcb->asoc.refcnt, -1); 3838 } 3839 asoc->state = 0; 3840 if (inp->sctp_tcbhash) { 3841 LIST_REMOVE(stcb, sctp_tcbhash); 3842 } 3843 if (stcb->asoc.in_restart_hash) { 3844 LIST_REMOVE(stcb, sctp_tcbrestarhash); 3845 } 3846 /* Now lets remove it from the list of ALL associations in the EP */ 3847 LIST_REMOVE(stcb, sctp_tcblist); 3848 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3849 SCTP_INP_INCR_REF(inp); 3850 SCTP_INP_WUNLOCK(inp); 3851 SCTP_ITERATOR_UNLOCK(); 3852 } 3853 /* pull from vtag hash */ 3854 LIST_REMOVE(stcb, sctp_asocs); 3855 sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT); 3856 3857 3858 /* 3859 * Now restop the timers to be sure - this is paranoia at is finest! 3860 */ 3861 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3862 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 3863 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 3864 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3865 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 3866 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 3867 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 3868 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 3869 3870 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 3871 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 3872 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 3873 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 3874 } 3875 3876 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 3877 prev = NULL; 3878 /* 3879 * The chunk lists and such SHOULD be empty but we check them just 3880 * in case. 3881 */ 3882 /* anything on the wheel needs to be removed */ 3883 for (i = 0; i < asoc->streamoutcnt; i++) { 3884 struct sctp_stream_out *outs; 3885 3886 outs = &asoc->strmout[i]; 3887 /* now clean up any chunks here */ 3888 sp = TAILQ_FIRST(&outs->outqueue); 3889 while (sp) { 3890 TAILQ_REMOVE(&outs->outqueue, sp, next); 3891 if (sp->data) { 3892 sctp_m_freem(sp->data); 3893 sp->data = NULL; 3894 sp->tail_mbuf = NULL; 3895 } 3896 sctp_free_remote_addr(sp->net); 3897 sctp_free_spbufspace(stcb, asoc, sp); 3898 /* Free the zone stuff */ 3899 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp); 3900 SCTP_DECR_STRMOQ_COUNT(); 3901 /* sa_ignore FREED_MEMORY */ 3902 sp = TAILQ_FIRST(&outs->outqueue); 3903 } 3904 } 3905 3906 /* sa_ignore FREED_MEMORY */ 3907 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { 3908 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); 3909 SCTP_FREE(liste, SCTP_M_STRESET); 3910 } 3911 3912 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 3913 while (sq) { 3914 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 3915 if (sq->data) { 3916 sctp_m_freem(sq->data); 3917 sq->data = NULL; 3918 } 3919 sctp_free_remote_addr(sq->whoFrom); 3920 sq->whoFrom = NULL; 3921 sq->stcb = NULL; 3922 /* Free the ctl entry */ 3923 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); 3924 SCTP_DECR_READQ_COUNT(); 3925 /* sa_ignore FREED_MEMORY */ 3926 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 3927 } 3928 3929 chk = TAILQ_FIRST(&asoc->free_chunks); 3930 while (chk) { 3931 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 3932 if (chk->data) { 3933 sctp_m_freem(chk->data); 3934 chk->data = NULL; 3935 } 3936 ccnt++; 3937 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 3938 SCTP_DECR_CHK_COUNT(); 3939 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1); 3940 asoc->free_chunk_cnt--; 3941 /* sa_ignore FREED_MEMORY */ 3942 chk = TAILQ_FIRST(&asoc->free_chunks); 3943 } 3944 /* pending send queue SHOULD be empty */ 3945 if (!TAILQ_EMPTY(&asoc->send_queue)) { 3946 chk = TAILQ_FIRST(&asoc->send_queue); 3947 while (chk) { 3948 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 3949 if (chk->data) { 3950 sctp_m_freem(chk->data); 3951 chk->data = NULL; 3952 } 3953 ccnt++; 3954 sctp_free_remote_addr(chk->whoTo); 3955 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 3956 SCTP_DECR_CHK_COUNT(); 3957 /* sa_ignore FREED_MEMORY */ 3958 chk = TAILQ_FIRST(&asoc->send_queue); 3959 } 3960 } 3961/* 3962 if(ccnt) { 3963 printf("Freed %d from send_queue\n", ccnt); 3964 ccnt = 0; 3965 } 3966*/ 3967 /* sent queue SHOULD be empty */ 3968 if (!TAILQ_EMPTY(&asoc->sent_queue)) { 3969 chk = TAILQ_FIRST(&asoc->sent_queue); 3970 while (chk) { 3971 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 3972 if (chk->data) { 3973 sctp_m_freem(chk->data); 3974 chk->data = NULL; 3975 } 3976 ccnt++; 3977 sctp_free_remote_addr(chk->whoTo); 3978 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 3979 SCTP_DECR_CHK_COUNT(); 3980 /* sa_ignore FREED_MEMORY */ 3981 chk = TAILQ_FIRST(&asoc->sent_queue); 3982 } 3983 } 3984/* 3985 if(ccnt) { 3986 printf("Freed %d from sent_queue\n", ccnt); 3987 ccnt = 0; 3988 } 3989*/ 3990 /* control queue MAY not be empty */ 3991 if (!TAILQ_EMPTY(&asoc->control_send_queue)) { 3992 chk = TAILQ_FIRST(&asoc->control_send_queue); 3993 while (chk) { 3994 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 3995 if (chk->data) { 3996 sctp_m_freem(chk->data); 3997 chk->data = NULL; 3998 } 3999 ccnt++; 4000 sctp_free_remote_addr(chk->whoTo); 4001 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4002 SCTP_DECR_CHK_COUNT(); 4003 /* sa_ignore FREED_MEMORY */ 4004 chk = TAILQ_FIRST(&asoc->control_send_queue); 4005 } 4006 } 4007/* 4008 if(ccnt) { 4009 printf("Freed %d from ctrl_queue\n", ccnt); 4010 ccnt = 0; 4011 } 4012*/ 4013 if (!TAILQ_EMPTY(&asoc->reasmqueue)) { 4014 chk = TAILQ_FIRST(&asoc->reasmqueue); 4015 while (chk) { 4016 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4017 if (chk->data) { 4018 sctp_m_freem(chk->data); 4019 chk->data = NULL; 4020 } 4021 sctp_free_remote_addr(chk->whoTo); 4022 ccnt++; 4023 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4024 SCTP_DECR_CHK_COUNT(); 4025 /* sa_ignore FREED_MEMORY */ 4026 chk = TAILQ_FIRST(&asoc->reasmqueue); 4027 } 4028 } 4029/* 4030 if(ccnt) { 4031 printf("Freed %d from reasm_queue\n", ccnt); 4032 ccnt = 0; 4033 } 4034*/ 4035 if (asoc->mapping_array) { 4036 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4037 asoc->mapping_array = NULL; 4038 } 4039 /* the stream outs */ 4040 if (asoc->strmout) { 4041 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4042 asoc->strmout = NULL; 4043 } 4044 asoc->streamoutcnt = 0; 4045 if (asoc->strmin) { 4046 struct sctp_queued_to_read *ctl; 4047 4048 for (i = 0; i < asoc->streamincnt; i++) { 4049 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { 4050 /* We have somethings on the streamin queue */ 4051 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4052 while (ctl) { 4053 TAILQ_REMOVE(&asoc->strmin[i].inqueue, 4054 ctl, next); 4055 sctp_free_remote_addr(ctl->whoFrom); 4056 if (ctl->data) { 4057 sctp_m_freem(ctl->data); 4058 ctl->data = NULL; 4059 } 4060 /* 4061 * We don't free the address here 4062 * since all the net's were freed 4063 * above. 4064 */ 4065 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); 4066 SCTP_DECR_READQ_COUNT(); 4067 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4068 } 4069 } 4070 } 4071 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4072 asoc->strmin = NULL; 4073 } 4074 asoc->streamincnt = 0; 4075 while (!TAILQ_EMPTY(&asoc->nets)) { 4076 /* sa_ignore FREED_MEMORY */ 4077 net = TAILQ_FIRST(&asoc->nets); 4078 /* pull from list */ 4079 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) { 4080#ifdef INVARIANTS 4081 panic("no net's left alloc'ed, or list points to itself"); 4082#endif 4083 break; 4084 } 4085 prev = net; 4086 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4087 sctp_free_remote_addr(net); 4088 } 4089 4090 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) { 4091 /* sa_ignore FREED_MEMORY */ 4092 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); 4093 sctp_remove_laddr(laddr); 4094 } 4095 4096 /* pending asconf (address) parameters */ 4097 while (!TAILQ_EMPTY(&asoc->asconf_queue)) { 4098 /* sa_ignore FREED_MEMORY */ 4099 aparam = TAILQ_FIRST(&asoc->asconf_queue); 4100 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 4101 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 4102 } 4103 if (asoc->last_asconf_ack_sent != NULL) { 4104 sctp_m_freem(asoc->last_asconf_ack_sent); 4105 asoc->last_asconf_ack_sent = NULL; 4106 } 4107 /* clean up auth stuff */ 4108 if (asoc->local_hmacs) 4109 sctp_free_hmaclist(asoc->local_hmacs); 4110 if (asoc->peer_hmacs) 4111 sctp_free_hmaclist(asoc->peer_hmacs); 4112 4113 if (asoc->local_auth_chunks) 4114 sctp_free_chunklist(asoc->local_auth_chunks); 4115 if (asoc->peer_auth_chunks) 4116 sctp_free_chunklist(asoc->peer_auth_chunks); 4117 4118 sctp_free_authinfo(&asoc->authinfo); 4119 4120 shared_key = LIST_FIRST(&asoc->shared_keys); 4121 while (shared_key) { 4122 LIST_REMOVE(shared_key, next); 4123 sctp_free_sharedkey(shared_key); 4124 /* sa_ignore FREED_MEMORY */ 4125 shared_key = LIST_FIRST(&asoc->shared_keys); 4126 } 4127 4128 /* Insert new items here :> */ 4129 4130 /* Get rid of LOCK */ 4131 SCTP_TCB_LOCK_DESTROY(stcb); 4132 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4133 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4134 SCTP_INP_INFO_WUNLOCK(); 4135 SCTP_INP_RLOCK(inp); 4136 } 4137#ifdef SCTP_TRACK_FREED_ASOCS 4138 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4139 /* now clean up the tasoc itself */ 4140 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 4141 SCTP_DECR_ASOC_COUNT(); 4142 } else { 4143 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 4144 } 4145#else 4146 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 4147 SCTP_DECR_ASOC_COUNT(); 4148#endif 4149 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4150 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4151 /* 4152 * If its NOT the inp_free calling us AND sctp_close 4153 * as been called, we call back... 4154 */ 4155 SCTP_INP_RUNLOCK(inp); 4156 /* 4157 * This will start the kill timer (if we are the 4158 * lastone) since we hold an increment yet. But this 4159 * is the only safe way to do this since otherwise 4160 * if the socket closes at the same time we are here 4161 * we might collide in the cleanup. 4162 */ 4163 sctp_inpcb_free(inp, 4164 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 4165 SCTP_CALLED_DIRECTLY_NOCMPSET); 4166 SCTP_INP_DECR_REF(inp); 4167 goto out_of; 4168 } else { 4169 /* The socket is still open. */ 4170 SCTP_INP_DECR_REF(inp); 4171 } 4172 } 4173 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4174 SCTP_INP_RUNLOCK(inp); 4175 } 4176out_of: 4177 /* destroyed the asoc */ 4178#ifdef SCTP_LOG_CLOSING 4179 sctp_log_closing(inp, NULL, 11); 4180#endif 4181 return (1); 4182} 4183 4184 4185 4186/* 4187 * determine if a destination is "reachable" based upon the addresses bound 4188 * to the current endpoint (e.g. only v4 or v6 currently bound) 4189 */ 4190/* 4191 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 4192 * assoc level v4/v6 flags, as the assoc *may* not have the same address 4193 * types bound as its endpoint 4194 */ 4195int 4196sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 4197{ 4198 struct sctp_inpcb *inp; 4199 int answer; 4200 4201 /* 4202 * No locks here, the TCB, in all cases is already locked and an 4203 * assoc is up. There is either a INP lock by the caller applied (in 4204 * asconf case when deleting an address) or NOT in the HB case, 4205 * however if HB then the INP increment is up and the INP will not 4206 * be removed (on top of the fact that we have a TCB lock). So we 4207 * only want to read the sctp_flags, which is either bound-all or 4208 * not.. no protection needed since once an assoc is up you can't be 4209 * changing your binding. 4210 */ 4211 inp = stcb->sctp_ep; 4212 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4213 /* if bound all, destination is not restricted */ 4214 /* 4215 * RRS: Question during lock work: Is this correct? If you 4216 * are bound-all you still might need to obey the V4--V6 4217 * flags??? IMO this bound-all stuff needs to be removed! 4218 */ 4219 return (1); 4220 } 4221 /* NOTE: all "scope" checks are done when local addresses are added */ 4222 if (destaddr->sa_family == AF_INET6) { 4223 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 4224 } else if (destaddr->sa_family == AF_INET) { 4225 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 4226 } else { 4227 /* invalid family, so it's unreachable */ 4228 answer = 0; 4229 } 4230 return (answer); 4231} 4232 4233/* 4234 * update the inp_vflags on an endpoint 4235 */ 4236static void 4237sctp_update_ep_vflag(struct sctp_inpcb *inp) 4238{ 4239 struct sctp_laddr *laddr; 4240 4241 /* first clear the flag */ 4242 inp->ip_inp.inp.inp_vflag = 0; 4243 /* set the flag based on addresses on the ep list */ 4244 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4245 if (laddr->ifa == NULL) { 4246 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 4247 __FUNCTION__); 4248 continue; 4249 } 4250 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 4251 continue; 4252 } 4253 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 4254 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4255 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 4256 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4257 } 4258 } 4259} 4260 4261/* 4262 * Add the address to the endpoint local address list There is nothing to be 4263 * done if we are bound to all addresses 4264 */ 4265void 4266sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 4267{ 4268 struct sctp_laddr *laddr; 4269 int fnd, error = 0; 4270 4271 fnd = 0; 4272 4273 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4274 /* You are already bound to all. You have it already */ 4275 return; 4276 } 4277 if (ifa->address.sa.sa_family == AF_INET6) { 4278 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 4279 /* Can't bind a non-useable addr. */ 4280 return; 4281 } 4282 } 4283 /* first, is it already present? */ 4284 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4285 if (laddr->ifa == ifa) { 4286 fnd = 1; 4287 break; 4288 } 4289 } 4290 4291 if (fnd == 0) { 4292 /* Not in the ep list */ 4293 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 4294 if (error != 0) 4295 return; 4296 inp->laddr_count++; 4297 /* update inp_vflag flags */ 4298 if (ifa->address.sa.sa_family == AF_INET6) { 4299 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4300 } else if (ifa->address.sa.sa_family == AF_INET) { 4301 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4302 } 4303 } 4304 return; 4305} 4306 4307 4308/* 4309 * select a new (hopefully reachable) destination net (should only be used 4310 * when we deleted an ep addr that is the only usable source address to reach 4311 * the destination net) 4312 */ 4313static void 4314sctp_select_primary_destination(struct sctp_tcb *stcb) 4315{ 4316 struct sctp_nets *net; 4317 4318 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4319 /* for now, we'll just pick the first reachable one we find */ 4320 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 4321 continue; 4322 if (sctp_destination_is_reachable(stcb, 4323 (struct sockaddr *)&net->ro._l_addr)) { 4324 /* found a reachable destination */ 4325 stcb->asoc.primary_destination = net; 4326 } 4327 } 4328 /* I can't there from here! ...we're gonna die shortly... */ 4329} 4330 4331 4332/* 4333 * Delete the address from the endpoint local address list There is nothing 4334 * to be done if we are bound to all addresses 4335 */ 4336void 4337sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 4338{ 4339 struct sctp_laddr *laddr; 4340 int fnd; 4341 4342 fnd = 0; 4343 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4344 /* You are already bound to all. You have it already */ 4345 return; 4346 } 4347 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4348 if (laddr->ifa == ifa) { 4349 fnd = 1; 4350 break; 4351 } 4352 } 4353 if (fnd && (inp->laddr_count < 2)) { 4354 /* can't delete unless there are at LEAST 2 addresses */ 4355 return; 4356 } 4357 if (fnd) { 4358 /* 4359 * clean up any use of this address go through our 4360 * associations and clear any last_used_address that match 4361 * this one for each assoc, see if a new primary_destination 4362 * is needed 4363 */ 4364 struct sctp_tcb *stcb; 4365 4366 /* clean up "next_addr_touse" */ 4367 if (inp->next_addr_touse == laddr) 4368 /* delete this address */ 4369 inp->next_addr_touse = NULL; 4370 4371 /* clean up "last_used_address" */ 4372 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 4373 struct sctp_nets *net; 4374 4375 SCTP_TCB_LOCK(stcb); 4376 if (stcb->asoc.last_used_address == laddr) 4377 /* delete this address */ 4378 stcb->asoc.last_used_address = NULL; 4379 /* 4380 * Now spin through all the nets and purge any ref 4381 * to laddr 4382 */ 4383 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4384 if (net->ro._s_addr && 4385 (net->ro._s_addr->ifa == laddr->ifa)) { 4386 /* Yep, purge src address selected */ 4387 sctp_rtentry_t *rt; 4388 4389 /* delete this address if cached */ 4390 rt = net->ro.ro_rt; 4391 if (rt != NULL) { 4392 RTFREE(rt); 4393 net->ro.ro_rt = NULL; 4394 } 4395 sctp_free_ifa(net->ro._s_addr); 4396 net->ro._s_addr = NULL; 4397 net->src_addr_selected = 0; 4398 } 4399 } 4400 SCTP_TCB_UNLOCK(stcb); 4401 } /* for each tcb */ 4402 /* remove it from the ep list */ 4403 sctp_remove_laddr(laddr); 4404 inp->laddr_count--; 4405 /* update inp_vflag flags */ 4406 sctp_update_ep_vflag(inp); 4407 } 4408 return; 4409} 4410 4411/* 4412 * Add the addr to the TCB local address list For the BOUNDALL or dynamic 4413 * case, this is a "pending" address list (eg. addresses waiting for an 4414 * ASCONF-ACK response) For the subset binding, static case, this is a 4415 * "valid" address list 4416 */ 4417void 4418sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa, int restricted_list) 4419{ 4420 struct sctp_inpcb *inp; 4421 struct sctp_laddr *laddr; 4422 struct sctpladdr *list; 4423 4424 /* 4425 * Assumes TCB is locked.. and possibly the INP. May need to 4426 * confirm/fix that if we need it and is not the case. 4427 */ 4428 list = &stcb->asoc.sctp_restricted_addrs; 4429 4430 inp = stcb->sctp_ep; 4431 if (ifa->address.sa.sa_family == AF_INET6) { 4432 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 4433 /* Can't bind a non-existent addr. */ 4434 return; 4435 } 4436 } 4437 /* does the address already exist? */ 4438 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 4439 if (laddr->ifa == ifa) { 4440 return; 4441 } 4442 } 4443 4444 /* add to the list */ 4445 (void)sctp_insert_laddr(list, ifa, 0); 4446 return; 4447} 4448 4449/* 4450 * insert an laddr entry with the given ifa for the desired list 4451 */ 4452int 4453sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 4454{ 4455 struct sctp_laddr *laddr; 4456 4457 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 4458 if (laddr == NULL) { 4459 /* out of memory? */ 4460 return (EINVAL); 4461 } 4462 SCTP_INCR_LADDR_COUNT(); 4463 bzero(laddr, sizeof(*laddr)); 4464 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 4465 laddr->ifa = ifa; 4466 laddr->action = act; 4467 atomic_add_int(&ifa->refcount, 1); 4468 /* insert it */ 4469 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 4470 4471 return (0); 4472} 4473 4474/* 4475 * Remove an laddr entry from the local address list (on an assoc) 4476 */ 4477void 4478sctp_remove_laddr(struct sctp_laddr *laddr) 4479{ 4480 4481 /* remove from the list */ 4482 LIST_REMOVE(laddr, sctp_nxt_addr); 4483 sctp_free_ifa(laddr->ifa); 4484 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr); 4485 SCTP_DECR_LADDR_COUNT(); 4486} 4487 4488/* 4489 * Remove an address from the TCB local address list 4490 */ 4491void 4492sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 4493{ 4494 struct sctp_inpcb *inp; 4495 struct sctp_laddr *laddr; 4496 4497 /* 4498 * This is called by asconf work. It is assumed that a) The TCB is 4499 * locked and b) The INP is locked. This is true in as much as I can 4500 * trace through the entry asconf code where I did these locks. 4501 * Again, the ASCONF code is a bit different in that it does lock 4502 * the INP during its work often times. This must be since we don't 4503 * want other proc's looking up things while what they are looking 4504 * up is changing :-D 4505 */ 4506 4507 inp = stcb->sctp_ep; 4508 /* if subset bound and don't allow ASCONF's, can't delete last */ 4509 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 4510 (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF) == 0)) { 4511 if (stcb->asoc.numnets < 2) { 4512 /* can't delete last address */ 4513 return; 4514 } 4515 } 4516 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 4517 /* remove the address if it exists */ 4518 if (laddr->ifa == NULL) 4519 continue; 4520 if (laddr->ifa == ifa) { 4521 sctp_remove_laddr(laddr); 4522 return; 4523 } 4524 } 4525 4526 /* address not found! */ 4527 return; 4528} 4529 4530static char sctp_pcb_initialized = 0; 4531 4532/* 4533 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 4534 */ 4535/* sysctl */ 4536static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 4537static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 4538 4539void 4540sctp_pcb_init() 4541{ 4542 /* 4543 * SCTP initialization for the PCB structures should be called by 4544 * the sctp_init() funciton. 4545 */ 4546 int i; 4547 4548 if (sctp_pcb_initialized != 0) { 4549 /* error I was called twice */ 4550 return; 4551 } 4552 sctp_pcb_initialized = 1; 4553 4554 bzero(&sctpstat, sizeof(struct sctpstat)); 4555 (void)SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime); 4556 /* init the empty list of (All) Endpoints */ 4557 LIST_INIT(&sctppcbinfo.listhead); 4558 4559 /* init the iterator head */ 4560 TAILQ_INIT(&sctppcbinfo.iteratorhead); 4561 4562 /* init the hash table of endpoints */ 4563 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize); 4564 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize); 4565 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale); 4566 sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31), 4567 &sctppcbinfo.hashasocmark); 4568 sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize, 4569 &sctppcbinfo.hashmark); 4570 sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize, 4571 &sctppcbinfo.hashtcpmark); 4572 sctppcbinfo.hashtblsize = sctp_hashtblsize; 4573 4574 /* init the small hash table we use to track restarted asoc's */ 4575 sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, 4576 &sctppcbinfo.hashrestartmark); 4577 4578 4579 sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 4580 &sctppcbinfo.hashvrfmark); 4581 4582 sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 4583 &sctppcbinfo.vrf_ifn_hashmark); 4584 4585 /* init the zones */ 4586 /* 4587 * FIX ME: Should check for NULL returns, but if it does fail we are 4588 * doomed to panic anyways... add later maybe. 4589 */ 4590 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep", 4591 sizeof(struct sctp_inpcb), maxsockets); 4592 4593 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc", 4594 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 4595 4596 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr", 4597 sizeof(struct sctp_laddr), 4598 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 4599 4600 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr", 4601 sizeof(struct sctp_nets), 4602 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 4603 4604 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk", 4605 sizeof(struct sctp_tmit_chunk), 4606 (sctp_max_number_of_assoc * sctp_chunkscale)); 4607 4608 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq", 4609 sizeof(struct sctp_queued_to_read), 4610 (sctp_max_number_of_assoc * sctp_chunkscale)); 4611 4612 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out", 4613 sizeof(struct sctp_stream_queue_pending), 4614 (sctp_max_number_of_assoc * sctp_chunkscale)); 4615 4616 /* Master Lock INIT for info structure */ 4617 SCTP_INP_INFO_LOCK_INIT(); 4618 SCTP_STATLOG_INIT_LOCK(); 4619 SCTP_ITERATOR_LOCK_INIT(); 4620 4621 SCTP_IPI_COUNT_INIT(); 4622 SCTP_IPI_ADDR_INIT(); 4623 SCTP_IPI_ITERATOR_WQ_INIT(); 4624#ifdef SCTP_PACKET_LOGGING 4625 SCTP_IP_PKTLOG_INIT(); 4626#endif 4627 LIST_INIT(&sctppcbinfo.addr_wq); 4628 4629 /* not sure if we need all the counts */ 4630 sctppcbinfo.ipi_count_ep = 0; 4631 /* assoc/tcb zone info */ 4632 sctppcbinfo.ipi_count_asoc = 0; 4633 /* local addrlist zone info */ 4634 sctppcbinfo.ipi_count_laddr = 0; 4635 /* remote addrlist zone info */ 4636 sctppcbinfo.ipi_count_raddr = 0; 4637 /* chunk info */ 4638 sctppcbinfo.ipi_count_chunk = 0; 4639 4640 /* socket queue zone info */ 4641 sctppcbinfo.ipi_count_readq = 0; 4642 4643 /* stream out queue cont */ 4644 sctppcbinfo.ipi_count_strmoq = 0; 4645 4646 sctppcbinfo.ipi_free_strmoq = 0; 4647 sctppcbinfo.ipi_free_chunks = 0; 4648 4649 SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer); 4650 4651 /* Init the TIMEWAIT list */ 4652 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) { 4653 LIST_INIT(&sctppcbinfo.vtag_timewait[i]); 4654 } 4655 4656#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 4657 sctppcbinfo.iterator_running = 0; 4658 sctp_startup_iterator(); 4659#endif 4660 4661 /* 4662 * INIT the default VRF which for BSD is the only one, other O/S's 4663 * may have more. But initially they must start with one and then 4664 * add the VRF's as addresses are added. 4665 */ 4666 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 4667 4668} 4669 4670 4671int 4672sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 4673 int iphlen, int offset, int limit, struct sctphdr *sh, 4674 struct sockaddr *altsa) 4675{ 4676 /* 4677 * grub through the INIT pulling addresses and loading them to the 4678 * nets structure in the asoc. The from address in the mbuf should 4679 * also be loaded (if it is not already). This routine can be called 4680 * with either INIT or INIT-ACK's as long as the m points to the IP 4681 * packet and the offset points to the beginning of the parameters. 4682 */ 4683 struct sctp_inpcb *inp, *l_inp; 4684 struct sctp_nets *net, *net_tmp; 4685 struct ip *iph; 4686 struct sctp_paramhdr *phdr, parm_buf; 4687 struct sctp_tcb *stcb_tmp; 4688 uint16_t ptype, plen; 4689 struct sockaddr *sa; 4690 struct sockaddr_storage dest_store; 4691 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 4692 struct sockaddr_in sin; 4693 struct sockaddr_in6 sin6; 4694 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 4695 struct sctp_auth_random *p_random = NULL; 4696 uint16_t random_len = 0; 4697 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 4698 struct sctp_auth_hmac_algo *hmacs = NULL; 4699 uint16_t hmacs_len = 0; 4700 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 4701 struct sctp_auth_chunk_list *chunks = NULL; 4702 uint16_t num_chunks = 0; 4703 sctp_key_t *new_key; 4704 uint32_t keylen; 4705 int got_random = 0, got_hmacs = 0, got_chklist = 0; 4706 4707 /* First get the destination address setup too. */ 4708 memset(&sin, 0, sizeof(sin)); 4709 memset(&sin6, 0, sizeof(sin6)); 4710 4711 sin.sin_family = AF_INET; 4712 sin.sin_len = sizeof(sin); 4713 sin.sin_port = stcb->rport; 4714 4715 sin6.sin6_family = AF_INET6; 4716 sin6.sin6_len = sizeof(struct sockaddr_in6); 4717 sin6.sin6_port = stcb->rport; 4718 if (altsa == NULL) { 4719 iph = mtod(m, struct ip *); 4720 if (iph->ip_v == IPVERSION) { 4721 /* its IPv4 */ 4722 struct sockaddr_in *sin_2; 4723 4724 sin_2 = (struct sockaddr_in *)(local_sa); 4725 memset(sin_2, 0, sizeof(sin)); 4726 sin_2->sin_family = AF_INET; 4727 sin_2->sin_len = sizeof(sin); 4728 sin_2->sin_port = sh->dest_port; 4729 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 4730 sin.sin_addr = iph->ip_src; 4731 sa = (struct sockaddr *)&sin; 4732 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 4733 /* its IPv6 */ 4734 struct ip6_hdr *ip6; 4735 struct sockaddr_in6 *sin6_2; 4736 4737 ip6 = mtod(m, struct ip6_hdr *); 4738 sin6_2 = (struct sockaddr_in6 *)(local_sa); 4739 memset(sin6_2, 0, sizeof(sin6)); 4740 sin6_2->sin6_family = AF_INET6; 4741 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 4742 sin6_2->sin6_port = sh->dest_port; 4743 sin6.sin6_addr = ip6->ip6_src; 4744 sa = (struct sockaddr *)&sin6; 4745 } else { 4746 sa = NULL; 4747 } 4748 } else { 4749 /* 4750 * For cookies we use the src address NOT from the packet 4751 * but from the original INIT 4752 */ 4753 sa = altsa; 4754 } 4755 /* Turn off ECN until we get through all params */ 4756 stcb->asoc.ecn_allowed = 0; 4757 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4758 /* mark all addresses that we have currently on the list */ 4759 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 4760 } 4761 /* does the source address already exist? if so skip it */ 4762 l_inp = inp = stcb->sctp_ep; 4763 4764 atomic_add_int(&stcb->asoc.refcnt, 1); 4765 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 4766 atomic_add_int(&stcb->asoc.refcnt, -1); 4767 4768 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 4769 /* we must add the source address */ 4770 /* no scope set here since we have a tcb already. */ 4771 if ((sa->sa_family == AF_INET) && 4772 (stcb->asoc.ipv4_addr_legal)) { 4773 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 4774 return (-1); 4775 } 4776 } else if ((sa->sa_family == AF_INET6) && 4777 (stcb->asoc.ipv6_addr_legal)) { 4778 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 4779 return (-2); 4780 } 4781 } 4782 } else { 4783 if (net_tmp != NULL && stcb_tmp == stcb) { 4784 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 4785 } else if (stcb_tmp != stcb) { 4786 /* It belongs to another association? */ 4787 SCTP_TCB_UNLOCK(stcb_tmp); 4788 return (-3); 4789 } 4790 } 4791 if (stcb->asoc.state == 0) { 4792 /* the assoc was freed? */ 4793 return (-4); 4794 } 4795 /* now we must go through each of the params. */ 4796 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 4797 while (phdr) { 4798 ptype = ntohs(phdr->param_type); 4799 plen = ntohs(phdr->param_length); 4800 /* 4801 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 4802 * (int)plen); 4803 */ 4804 if (offset + plen > limit) { 4805 break; 4806 } 4807 if (plen == 0) { 4808 break; 4809 } 4810 if (ptype == SCTP_IPV4_ADDRESS) { 4811 if (stcb->asoc.ipv4_addr_legal) { 4812 struct sctp_ipv4addr_param *p4, p4_buf; 4813 4814 /* ok get the v4 address and check/add */ 4815 phdr = sctp_get_next_param(m, offset, 4816 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 4817 if (plen != sizeof(struct sctp_ipv4addr_param) || 4818 phdr == NULL) { 4819 return (-5); 4820 } 4821 p4 = (struct sctp_ipv4addr_param *)phdr; 4822 sin.sin_addr.s_addr = p4->addr; 4823 if (IN_MULTICAST(sin.sin_addr.s_addr)) { 4824 /* Skip multi-cast addresses */ 4825 goto next_param; 4826 } 4827 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 4828 (sin.sin_addr.s_addr == INADDR_ANY)) { 4829 goto next_param; 4830 } 4831 sa = (struct sockaddr *)&sin; 4832 inp = stcb->sctp_ep; 4833 atomic_add_int(&stcb->asoc.refcnt, 1); 4834 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 4835 local_sa, stcb); 4836 atomic_add_int(&stcb->asoc.refcnt, -1); 4837 4838 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 4839 inp == NULL) { 4840 /* we must add the source address */ 4841 /* 4842 * no scope set since we have a tcb 4843 * already 4844 */ 4845 4846 /* 4847 * we must validate the state again 4848 * here 4849 */ 4850 if (stcb->asoc.state == 0) { 4851 /* the assoc was freed? */ 4852 return (-7); 4853 } 4854 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 4855 return (-8); 4856 } 4857 } else if (stcb_tmp == stcb) { 4858 if (stcb->asoc.state == 0) { 4859 /* the assoc was freed? */ 4860 return (-10); 4861 } 4862 if (net != NULL) { 4863 /* clear flag */ 4864 net->dest_state &= 4865 ~SCTP_ADDR_NOT_IN_ASSOC; 4866 } 4867 } else { 4868 /* 4869 * strange, address is in another 4870 * assoc? straighten out locks. 4871 */ 4872 if (stcb->asoc.state == 0) { 4873 /* the assoc was freed? */ 4874 return (-12); 4875 } 4876 return (-13); 4877 } 4878 } 4879 } else if (ptype == SCTP_IPV6_ADDRESS) { 4880 if (stcb->asoc.ipv6_addr_legal) { 4881 /* ok get the v6 address and check/add */ 4882 struct sctp_ipv6addr_param *p6, p6_buf; 4883 4884 phdr = sctp_get_next_param(m, offset, 4885 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 4886 if (plen != sizeof(struct sctp_ipv6addr_param) || 4887 phdr == NULL) { 4888 return (-14); 4889 } 4890 p6 = (struct sctp_ipv6addr_param *)phdr; 4891 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 4892 sizeof(p6->addr)); 4893 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 4894 /* Skip multi-cast addresses */ 4895 goto next_param; 4896 } 4897 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 4898 /* 4899 * Link local make no sense without 4900 * scope 4901 */ 4902 goto next_param; 4903 } 4904 sa = (struct sockaddr *)&sin6; 4905 inp = stcb->sctp_ep; 4906 atomic_add_int(&stcb->asoc.refcnt, 1); 4907 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 4908 local_sa, stcb); 4909 atomic_add_int(&stcb->asoc.refcnt, -1); 4910 if (stcb_tmp == NULL && (inp == stcb->sctp_ep || 4911 inp == NULL)) { 4912 /* 4913 * we must validate the state again 4914 * here 4915 */ 4916 if (stcb->asoc.state == 0) { 4917 /* the assoc was freed? */ 4918 return (-16); 4919 } 4920 /* 4921 * we must add the address, no scope 4922 * set 4923 */ 4924 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 4925 return (-17); 4926 } 4927 } else if (stcb_tmp == stcb) { 4928 /* 4929 * we must validate the state again 4930 * here 4931 */ 4932 if (stcb->asoc.state == 0) { 4933 /* the assoc was freed? */ 4934 return (-19); 4935 } 4936 if (net != NULL) { 4937 /* clear flag */ 4938 net->dest_state &= 4939 ~SCTP_ADDR_NOT_IN_ASSOC; 4940 } 4941 } else { 4942 /* 4943 * strange, address is in another 4944 * assoc? straighten out locks. 4945 */ 4946 if (stcb->asoc.state == 0) { 4947 /* the assoc was freed? */ 4948 return (-21); 4949 } 4950 return (-22); 4951 } 4952 } 4953 } else if (ptype == SCTP_ECN_CAPABLE) { 4954 stcb->asoc.ecn_allowed = 1; 4955 } else if (ptype == SCTP_ULP_ADAPTATION) { 4956 if (stcb->asoc.state != SCTP_STATE_OPEN) { 4957 struct sctp_adaptation_layer_indication ai, 4958 *aip; 4959 4960 phdr = sctp_get_next_param(m, offset, 4961 (struct sctp_paramhdr *)&ai, sizeof(ai)); 4962 aip = (struct sctp_adaptation_layer_indication *)phdr; 4963 if (aip) { 4964 sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION, 4965 stcb, ntohl(aip->indication), NULL); 4966 } 4967 } 4968 } else if (ptype == SCTP_SET_PRIM_ADDR) { 4969 struct sctp_asconf_addr_param lstore, *fee; 4970 struct sctp_asconf_addrv4_param *fii; 4971 int lptype; 4972 struct sockaddr *lsa = NULL; 4973 4974 stcb->asoc.peer_supports_asconf = 1; 4975 if (plen > sizeof(lstore)) { 4976 return (-23); 4977 } 4978 phdr = sctp_get_next_param(m, offset, 4979 (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore))); 4980 if (phdr == NULL) { 4981 return (-24); 4982 } 4983 fee = (struct sctp_asconf_addr_param *)phdr; 4984 lptype = ntohs(fee->addrp.ph.param_type); 4985 if (lptype == SCTP_IPV4_ADDRESS) { 4986 if (plen != 4987 sizeof(struct sctp_asconf_addrv4_param)) { 4988 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 4989 (int)sizeof(struct sctp_asconf_addrv4_param), 4990 plen); 4991 } else { 4992 fii = (struct sctp_asconf_addrv4_param *)fee; 4993 sin.sin_addr.s_addr = fii->addrp.addr; 4994 lsa = (struct sockaddr *)&sin; 4995 } 4996 } else if (lptype == SCTP_IPV6_ADDRESS) { 4997 if (plen != 4998 sizeof(struct sctp_asconf_addr_param)) { 4999 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 5000 (int)sizeof(struct sctp_asconf_addr_param), 5001 plen); 5002 } else { 5003 memcpy(sin6.sin6_addr.s6_addr, 5004 fee->addrp.addr, 5005 sizeof(fee->addrp.addr)); 5006 lsa = (struct sockaddr *)&sin6; 5007 } 5008 } 5009 if (lsa) { 5010 (void)sctp_set_primary_addr(stcb, sa, NULL); 5011 } 5012 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 5013 /* Peer supports pr-sctp */ 5014 stcb->asoc.peer_supports_prsctp = 1; 5015 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 5016 /* A supported extension chunk */ 5017 struct sctp_supported_chunk_types_param *pr_supported; 5018 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 5019 int num_ent, i; 5020 5021 phdr = sctp_get_next_param(m, offset, 5022 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 5023 if (phdr == NULL) { 5024 return (-25); 5025 } 5026 stcb->asoc.peer_supports_asconf = 0; 5027 stcb->asoc.peer_supports_prsctp = 0; 5028 stcb->asoc.peer_supports_pktdrop = 0; 5029 stcb->asoc.peer_supports_strreset = 0; 5030 stcb->asoc.peer_supports_auth = 0; 5031 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 5032 num_ent = plen - sizeof(struct sctp_paramhdr); 5033 for (i = 0; i < num_ent; i++) { 5034 switch (pr_supported->chunk_types[i]) { 5035 case SCTP_ASCONF: 5036 case SCTP_ASCONF_ACK: 5037 stcb->asoc.peer_supports_asconf = 1; 5038 break; 5039 case SCTP_FORWARD_CUM_TSN: 5040 stcb->asoc.peer_supports_prsctp = 1; 5041 break; 5042 case SCTP_PACKET_DROPPED: 5043 stcb->asoc.peer_supports_pktdrop = 1; 5044 break; 5045 case SCTP_STREAM_RESET: 5046 stcb->asoc.peer_supports_strreset = 1; 5047 break; 5048 case SCTP_AUTHENTICATION: 5049 stcb->asoc.peer_supports_auth = 1; 5050 break; 5051 default: 5052 /* one I have not learned yet */ 5053 break; 5054 5055 } 5056 } 5057 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 5058 /* Peer supports ECN-nonce */ 5059 stcb->asoc.peer_supports_ecn_nonce = 1; 5060 stcb->asoc.ecn_nonce_allowed = 1; 5061 } else if (ptype == SCTP_RANDOM) { 5062 if (plen > sizeof(random_store)) 5063 break; 5064 if (got_random) { 5065 /* already processed a RANDOM */ 5066 goto next_param; 5067 } 5068 phdr = sctp_get_next_param(m, offset, 5069 (struct sctp_paramhdr *)random_store, 5070 min(sizeof(random_store), plen)); 5071 if (phdr == NULL) 5072 return (-26); 5073 p_random = (struct sctp_auth_random *)phdr; 5074 random_len = plen - sizeof(*p_random); 5075 /* enforce the random length */ 5076 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 5077 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 5078 return (-27); 5079 } 5080 got_random = 1; 5081 } else if (ptype == SCTP_HMAC_LIST) { 5082 int num_hmacs; 5083 int i; 5084 5085 if (plen > sizeof(hmacs_store)) 5086 break; 5087 if (got_hmacs) { 5088 /* already processed a HMAC list */ 5089 goto next_param; 5090 } 5091 phdr = sctp_get_next_param(m, offset, 5092 (struct sctp_paramhdr *)hmacs_store, 5093 min(plen, sizeof(hmacs_store))); 5094 if (phdr == NULL) 5095 return (-28); 5096 hmacs = (struct sctp_auth_hmac_algo *)phdr; 5097 hmacs_len = plen - sizeof(*hmacs); 5098 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 5099 /* validate the hmac list */ 5100 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 5101 return (-29); 5102 } 5103 if (stcb->asoc.peer_hmacs != NULL) 5104 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 5105 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 5106 if (stcb->asoc.peer_hmacs != NULL) { 5107 for (i = 0; i < num_hmacs; i++) { 5108 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 5109 ntohs(hmacs->hmac_ids[i])); 5110 } 5111 } 5112 got_hmacs = 1; 5113 } else if (ptype == SCTP_CHUNK_LIST) { 5114 int i; 5115 5116 if (plen > sizeof(chunks_store)) 5117 break; 5118 if (got_chklist) { 5119 /* already processed a Chunks list */ 5120 goto next_param; 5121 } 5122 phdr = sctp_get_next_param(m, offset, 5123 (struct sctp_paramhdr *)chunks_store, 5124 min(plen, sizeof(chunks_store))); 5125 if (phdr == NULL) 5126 return (-30); 5127 chunks = (struct sctp_auth_chunk_list *)phdr; 5128 num_chunks = plen - sizeof(*chunks); 5129 if (stcb->asoc.peer_auth_chunks != NULL) 5130 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 5131 else 5132 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 5133 for (i = 0; i < num_chunks; i++) { 5134 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 5135 stcb->asoc.peer_auth_chunks); 5136 } 5137 got_chklist = 1; 5138 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 5139 (ptype == SCTP_STATE_COOKIE) || 5140 (ptype == SCTP_UNRECOG_PARAM) || 5141 (ptype == SCTP_COOKIE_PRESERVE) || 5142 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 5143 (ptype == SCTP_ADD_IP_ADDRESS) || 5144 (ptype == SCTP_DEL_IP_ADDRESS) || 5145 (ptype == SCTP_ERROR_CAUSE_IND) || 5146 (ptype == SCTP_SUCCESS_REPORT)) { 5147 /* don't care */ ; 5148 } else { 5149 if ((ptype & 0x8000) == 0x0000) { 5150 /* 5151 * must stop processing the rest of the 5152 * param's. Any report bits were handled 5153 * with the call to 5154 * sctp_arethere_unrecognized_parameters() 5155 * when the INIT or INIT-ACK was first seen. 5156 */ 5157 break; 5158 } 5159 } 5160next_param: 5161 offset += SCTP_SIZE32(plen); 5162 if (offset >= limit) { 5163 break; 5164 } 5165 phdr = sctp_get_next_param(m, offset, &parm_buf, 5166 sizeof(parm_buf)); 5167 } 5168 /* Now check to see if we need to purge any addresses */ 5169 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { 5170 net_tmp = TAILQ_NEXT(net, sctp_next); 5171 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 5172 SCTP_ADDR_NOT_IN_ASSOC) { 5173 /* This address has been removed from the asoc */ 5174 /* remove and free it */ 5175 stcb->asoc.numnets--; 5176 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 5177 sctp_free_remote_addr(net); 5178 if (net == stcb->asoc.primary_destination) { 5179 stcb->asoc.primary_destination = NULL; 5180 sctp_select_primary_destination(stcb); 5181 } 5182 } 5183 } 5184 /* validate authentication required parameters */ 5185 if (got_random && got_hmacs) { 5186 stcb->asoc.peer_supports_auth = 1; 5187 } else { 5188 stcb->asoc.peer_supports_auth = 0; 5189 } 5190 if (!stcb->asoc.peer_supports_auth && got_chklist) { 5191 /* peer does not support auth but sent a chunks list? */ 5192 return (-31); 5193 } 5194 if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf && 5195 !stcb->asoc.peer_supports_auth) { 5196 /* peer supports asconf but not auth? */ 5197 return (-32); 5198 } 5199 /* concatenate the full random key */ 5200#ifdef SCTP_AUTH_DRAFT_04 5201 keylen = random_len; 5202 new_key = sctp_alloc_key(keylen); 5203 if (new_key != NULL) { 5204 /* copy in the RANDOM */ 5205 if (p_random != NULL) 5206 bcopy(p_random->random_data, new_key->key, random_len); 5207 } 5208#else 5209 keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks + 5210 sizeof(*hmacs) + hmacs_len; 5211 new_key = sctp_alloc_key(keylen); 5212 if (new_key != NULL) { 5213 /* copy in the RANDOM */ 5214 if (p_random != NULL) { 5215 keylen = sizeof(*p_random) + random_len; 5216 bcopy(p_random, new_key->key, keylen); 5217 } 5218 /* append in the AUTH chunks */ 5219 if (chunks != NULL) { 5220 bcopy(chunks, new_key->key + keylen, 5221 sizeof(*chunks) + num_chunks); 5222 keylen += sizeof(*chunks) + num_chunks; 5223 } 5224 /* append in the HMACs */ 5225 if (hmacs != NULL) { 5226 bcopy(hmacs, new_key->key + keylen, 5227 sizeof(*hmacs) + hmacs_len); 5228 } 5229 } 5230#endif 5231 else { 5232 /* failed to get memory for the key */ 5233 return (-33); 5234 } 5235 if (stcb->asoc.authinfo.peer_random != NULL) 5236 sctp_free_key(stcb->asoc.authinfo.peer_random); 5237 stcb->asoc.authinfo.peer_random = new_key; 5238#ifdef SCTP_AUTH_DRAFT_04 5239 /* don't include the chunks and hmacs for draft -04 */ 5240 stcb->asoc.authinfo.peer_random->keylen = random_len; 5241#endif 5242 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 5243 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 5244 5245 return (0); 5246} 5247 5248int 5249sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 5250 struct sctp_nets *net) 5251{ 5252 /* make sure the requested primary address exists in the assoc */ 5253 if (net == NULL && sa) 5254 net = sctp_findnet(stcb, sa); 5255 5256 if (net == NULL) { 5257 /* didn't find the requested primary address! */ 5258 return (-1); 5259 } else { 5260 /* set the primary address */ 5261 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 5262 /* Must be confirmed, so queue to set */ 5263 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 5264 return (0); 5265 } 5266 stcb->asoc.primary_destination = net; 5267 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 5268 net = TAILQ_FIRST(&stcb->asoc.nets); 5269 if (net != stcb->asoc.primary_destination) { 5270 /* 5271 * first one on the list is NOT the primary 5272 * sctp_cmpaddr() is much more efficent if the 5273 * primary is the first on the list, make it so. 5274 */ 5275 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 5276 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 5277 } 5278 return (0); 5279 } 5280} 5281 5282 5283int 5284sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now) 5285{ 5286 /* 5287 * This function serves two purposes. It will see if a TAG can be 5288 * re-used and return 1 for yes it is ok and 0 for don't use that 5289 * tag. A secondary function it will do is purge out old tags that 5290 * can be removed. 5291 */ 5292 struct sctpasochead *head; 5293 struct sctpvtaghead *chain; 5294 struct sctp_tagblock *twait_block; 5295 struct sctp_tcb *stcb; 5296 int i; 5297 5298 SCTP_INP_INFO_WLOCK(); 5299 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 5300 /* First is the vtag in use ? */ 5301 5302 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag, 5303 sctppcbinfo.hashasocmark)]; 5304 if (head == NULL) { 5305 goto check_restart; 5306 } 5307 LIST_FOREACH(stcb, head, sctp_asocs) { 5308 5309 if (stcb->asoc.my_vtag == tag) { 5310 /* 5311 * We should remove this if and return 0 always if 5312 * we want vtags unique across all endpoints. For 5313 * now within a endpoint is ok. 5314 */ 5315 if (inp == stcb->sctp_ep) { 5316 /* bad tag, in use */ 5317 SCTP_INP_INFO_WUNLOCK(); 5318 return (0); 5319 } 5320 } 5321 } 5322check_restart: 5323 /* Now lets check the restart hash */ 5324 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag, 5325 sctppcbinfo.hashrestartmark)]; 5326 if (head == NULL) { 5327 goto check_time_wait; 5328 } 5329 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { 5330 if (stcb->asoc.assoc_id == tag) { 5331 /* candidate */ 5332 if (inp == stcb->sctp_ep) { 5333 /* bad tag, in use */ 5334 SCTP_INP_INFO_WUNLOCK(); 5335 return (0); 5336 } 5337 } 5338 } 5339check_time_wait: 5340 /* Now what about timed wait ? */ 5341 if (!SCTP_LIST_EMPTY(chain)) { 5342 /* 5343 * Block(s) are present, lets see if we have this tag in the 5344 * list 5345 */ 5346 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5347 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 5348 if (twait_block->vtag_block[i].v_tag == 0) { 5349 /* not used */ 5350 continue; 5351 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire > 5352 now->tv_sec) { 5353 /* Audit expires this guy */ 5354 twait_block->vtag_block[i].tv_sec_at_expire = 0; 5355 twait_block->vtag_block[i].v_tag = 0; 5356 } else if (twait_block->vtag_block[i].v_tag == 5357 tag) { 5358 /* Bad tag, sorry :< */ 5359 SCTP_INP_INFO_WUNLOCK(); 5360 return (0); 5361 } 5362 } 5363 } 5364 } 5365 /* Not found, ok to use the tag */ 5366 SCTP_INP_INFO_WUNLOCK(); 5367 return (1); 5368} 5369 5370 5371static sctp_assoc_t reneged_asoc_ids[256]; 5372static uint8_t reneged_at = 0; 5373 5374 5375static void 5376sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 5377{ 5378 /* 5379 * We must hunt this association for MBUF's past the cumack (i.e. 5380 * out of order data that we can renege on). 5381 */ 5382 struct sctp_association *asoc; 5383 struct sctp_tmit_chunk *chk, *nchk; 5384 uint32_t cumulative_tsn_p1, tsn; 5385 struct sctp_queued_to_read *ctl, *nctl; 5386 int cnt, strmat, gap; 5387 5388 /* We look for anything larger than the cum-ack + 1 */ 5389 5390 SCTP_STAT_INCR(sctps_protocol_drain_calls); 5391 if (sctp_do_drain == 0) { 5392 return; 5393 } 5394 asoc = &stcb->asoc; 5395 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 5396 /* none we can reneg on. */ 5397 return; 5398 } 5399 SCTP_STAT_INCR(sctps_protocol_drains_done); 5400 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 5401 cnt = 0; 5402 /* First look in the re-assembly queue */ 5403 chk = TAILQ_FIRST(&asoc->reasmqueue); 5404 while (chk) { 5405 /* Get the next one */ 5406 nchk = TAILQ_NEXT(chk, sctp_next); 5407 if (compare_with_wrap(chk->rec.data.TSN_seq, 5408 cumulative_tsn_p1, MAX_TSN)) { 5409 /* Yep it is above cum-ack */ 5410 cnt++; 5411 tsn = chk->rec.data.TSN_seq; 5412 if (tsn >= asoc->mapping_array_base_tsn) { 5413 gap = tsn - asoc->mapping_array_base_tsn; 5414 } else { 5415 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 5416 tsn + 1; 5417 } 5418 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 5419 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 5420 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 5421 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5422 if (chk->data) { 5423 sctp_m_freem(chk->data); 5424 chk->data = NULL; 5425 } 5426 sctp_free_remote_addr(chk->whoTo); 5427 sctp_free_a_chunk(stcb, chk); 5428 } 5429 chk = nchk; 5430 } 5431 /* Ok that was fun, now we will drain all the inbound streams? */ 5432 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 5433 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); 5434 while (ctl) { 5435 nctl = TAILQ_NEXT(ctl, next); 5436 if (compare_with_wrap(ctl->sinfo_tsn, 5437 cumulative_tsn_p1, MAX_TSN)) { 5438 /* Yep it is above cum-ack */ 5439 cnt++; 5440 tsn = ctl->sinfo_tsn; 5441 if (tsn >= asoc->mapping_array_base_tsn) { 5442 gap = tsn - 5443 asoc->mapping_array_base_tsn; 5444 } else { 5445 gap = (MAX_TSN - 5446 asoc->mapping_array_base_tsn) + 5447 tsn + 1; 5448 } 5449 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 5450 sctp_ucount_decr(asoc->cnt_on_all_streams); 5451 5452 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, 5453 gap); 5454 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, 5455 ctl, next); 5456 if (ctl->data) { 5457 sctp_m_freem(ctl->data); 5458 ctl->data = NULL; 5459 } 5460 sctp_free_remote_addr(ctl->whoFrom); 5461 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); 5462 SCTP_DECR_READQ_COUNT(); 5463 } 5464 ctl = nctl; 5465 } 5466 } 5467 /* 5468 * Question, should we go through the delivery queue? The only 5469 * reason things are on here is the app not reading OR a p-d-api up. 5470 * An attacker COULD send enough in to initiate the PD-API and then 5471 * send a bunch of stuff to other streams... these would wind up on 5472 * the delivery queue.. and then we would not get to them. But in 5473 * order to do this I then have to back-track and un-deliver 5474 * sequence numbers in streams.. el-yucko. I think for now we will 5475 * NOT look at the delivery queue and leave it to be something to 5476 * consider later. An alternative would be to abort the P-D-API with 5477 * a notification and then deliver the data.... Or another method 5478 * might be to keep track of how many times the situation occurs and 5479 * if we see a possible attack underway just abort the association. 5480 */ 5481#ifdef SCTP_DEBUG 5482 if (cnt) { 5483 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 5484 } 5485#endif 5486 if (cnt) { 5487 /* 5488 * Now do we need to find a new 5489 * asoc->highest_tsn_inside_map? 5490 */ 5491 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) { 5492 gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn; 5493 } else { 5494 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 5495 asoc->highest_tsn_inside_map + 1; 5496 } 5497 if (gap >= (asoc->mapping_array_size << 3)) { 5498 /* 5499 * Something bad happened or cum-ack and high were 5500 * behind the base, but if so earlier checks should 5501 * have found NO data... wierd... we will start at 5502 * end of mapping array. 5503 */ 5504 SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n", 5505 (int)gap, 5506 (int)(asoc->mapping_array_size << 3), 5507 (int)asoc->highest_tsn_inside_map); 5508 gap = asoc->mapping_array_size << 3; 5509 } 5510 while (gap > 0) { 5511 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 5512 /* found the new highest */ 5513 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap; 5514 break; 5515 } 5516 gap--; 5517 } 5518 if (gap == 0) { 5519 /* Nothing left in map */ 5520 memset(asoc->mapping_array, 0, asoc->mapping_array_size); 5521 asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1; 5522 asoc->highest_tsn_inside_map = asoc->cumulative_tsn; 5523 } 5524 asoc->last_revoke_count = cnt; 5525 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 5526 sctp_send_sack(stcb); 5527 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN); 5528 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 5529 reneged_at++; 5530 } 5531 /* 5532 * Another issue, in un-setting the TSN's in the mapping array we 5533 * DID NOT adjust the higest_tsn marker. This will cause one of two 5534 * things to occur. It may cause us to do extra work in checking for 5535 * our mapping array movement. More importantly it may cause us to 5536 * SACK every datagram. This may not be a bad thing though since we 5537 * will recover once we get our cum-ack above and all this stuff we 5538 * dumped recovered. 5539 */ 5540} 5541 5542void 5543sctp_drain() 5544{ 5545 /* 5546 * We must walk the PCB lists for ALL associations here. The system 5547 * is LOW on MBUF's and needs help. This is where reneging will 5548 * occur. We really hope this does NOT happen! 5549 */ 5550 struct sctp_inpcb *inp; 5551 struct sctp_tcb *stcb; 5552 5553 SCTP_INP_INFO_RLOCK(); 5554 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 5555 /* For each endpoint */ 5556 SCTP_INP_RLOCK(inp); 5557 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5558 /* For each association */ 5559 SCTP_TCB_LOCK(stcb); 5560 sctp_drain_mbufs(inp, stcb); 5561 SCTP_TCB_UNLOCK(stcb); 5562 } 5563 SCTP_INP_RUNLOCK(inp); 5564 } 5565 SCTP_INP_INFO_RUNLOCK(); 5566} 5567 5568/* 5569 * start a new iterator 5570 * iterates through all endpoints and associations based on the pcb_state 5571 * flags and asoc_state. "af" (mandatory) is executed for all matching 5572 * assocs and "ef" (optional) is executed when the iterator completes. 5573 * "inpf" (optional) is executed for each new endpoint as it is being 5574 * iterated through. inpe (optional) is called when the inp completes 5575 * its way through all the stcbs. 5576 */ 5577int 5578sctp_initiate_iterator(inp_func inpf, 5579 asoc_func af, 5580 inp_func inpe, 5581 uint32_t pcb_state, 5582 uint32_t pcb_features, 5583 uint32_t asoc_state, 5584 void *argp, 5585 uint32_t argi, 5586 end_func ef, 5587 struct sctp_inpcb *s_inp, 5588 uint8_t chunk_output_off) 5589{ 5590 struct sctp_iterator *it = NULL; 5591 5592 if (af == NULL) { 5593 return (-1); 5594 } 5595 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 5596 SCTP_M_ITER); 5597 if (it == NULL) { 5598 return (ENOMEM); 5599 } 5600 memset(it, 0, sizeof(*it)); 5601 it->function_assoc = af; 5602 it->function_inp = inpf; 5603 if (inpf) 5604 it->done_current_ep = 0; 5605 else 5606 it->done_current_ep = 1; 5607 it->function_atend = ef; 5608 it->pointer = argp; 5609 it->val = argi; 5610 it->pcb_flags = pcb_state; 5611 it->pcb_features = pcb_features; 5612 it->asoc_state = asoc_state; 5613 it->function_inp_end = inpe; 5614 it->no_chunk_output = chunk_output_off; 5615 if (s_inp) { 5616 it->inp = s_inp; 5617 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 5618 } else { 5619 SCTP_INP_INFO_RLOCK(); 5620 it->inp = LIST_FIRST(&sctppcbinfo.listhead); 5621 5622 SCTP_INP_INFO_RUNLOCK(); 5623 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 5624 5625 } 5626 SCTP_IPI_ITERATOR_WQ_LOCK(); 5627 if (it->inp) { 5628 SCTP_INP_INCR_REF(it->inp); 5629 } 5630 TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr); 5631#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 5632 if (sctppcbinfo.iterator_running == 0) { 5633 sctp_wakeup_iterator(); 5634 } 5635 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5636#else 5637 if (it->inp) 5638 SCTP_INP_DECR_REF(it->inp); 5639 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5640 /* Init the timer */ 5641 SCTP_OS_TIMER_INIT(&it->tmr.timer); 5642 /* add to the list of all iterators */ 5643 sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it, 5644 NULL, NULL); 5645#endif 5646 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 5647 return (0); 5648} 5649