sctp_pcb.c revision 171572
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 171572 2007-07-24 20:06:02Z 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 vrf->refcount = 0; 159 /* now also setup table ids */ 160 SCTP_INIT_VRF_TABLEID(vrf); 161 /* Init the HASH of addresses */ 162 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 163 &vrf->vrf_addr_hashmark); 164 if (vrf->vrf_addr_hash == NULL) { 165 /* No memory */ 166#ifdef INVARIANTS 167 panic("No memory for VRF:%d", vrf_id); 168#endif 169 SCTP_FREE(vrf, SCTP_M_VRF); 170 return (NULL); 171 } 172 /* Add it to the hash table */ 173 bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)]; 174 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 175 atomic_add_int(&sctppcbinfo.ipi_count_vrfs, 1); 176 return (vrf); 177} 178 179 180struct sctp_ifn * 181sctp_find_ifn(void *ifn, uint32_t ifn_index) 182{ 183 struct sctp_ifn *sctp_ifnp; 184 struct sctp_ifnlist *hash_ifn_head; 185 186 /* 187 * We assume the lock is held for the addresses if thats wrong 188 * problems could occur :-) 189 */ 190 hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)]; 191 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 192 if (sctp_ifnp->ifn_index == ifn_index) { 193 return (sctp_ifnp); 194 } 195 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 196 return (sctp_ifnp); 197 } 198 } 199 return (NULL); 200} 201 202 203 204struct sctp_vrf * 205sctp_find_vrf(uint32_t vrf_id) 206{ 207 struct sctp_vrflist *bucket; 208 struct sctp_vrf *liste; 209 210 bucket = &sctppcbinfo.sctp_vrfhash[(vrf_id & sctppcbinfo.hashvrfmark)]; 211 LIST_FOREACH(liste, bucket, next_vrf) { 212 if (vrf_id == liste->vrf_id) { 213 return (liste); 214 } 215 } 216 return (NULL); 217} 218 219void 220sctp_free_vrf(struct sctp_vrf *vrf) 221{ 222 int ret; 223 224 ret = atomic_fetchadd_int(&vrf->refcount, -1); 225 if (ret == 1) { 226 /* We zero'd the count */ 227 LIST_REMOVE(vrf, next_vrf); 228 SCTP_FREE(vrf, SCTP_M_VRF); 229 atomic_subtract_int(&sctppcbinfo.ipi_count_vrfs, 1); 230 } 231} 232 233void 234sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 235{ 236 int ret; 237 238 ret = atomic_fetchadd_int(&sctp_ifnp->refcount, -1); 239 if (ret == 1) { 240 /* We zero'd the count */ 241 if (sctp_ifnp->vrf) { 242 sctp_free_vrf(sctp_ifnp->vrf); 243 } 244 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 245 atomic_subtract_int(&sctppcbinfo.ipi_count_ifns, 1); 246 } 247} 248 249void 250sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 251{ 252 struct sctp_ifn *sctp_ifnp; 253 254 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 255 if (sctp_ifnp != NULL) { 256 sctp_ifnp->ifn_mtu = mtu; 257 } 258} 259 260 261void 262sctp_free_ifa(struct sctp_ifa *sctp_ifap) 263{ 264 int ret; 265 266 ret = atomic_fetchadd_int(&sctp_ifap->refcount, -1); 267 if (ret == 1) { 268 /* We zero'd the count */ 269 if (sctp_ifap->ifn_p) { 270 sctp_free_ifn(sctp_ifap->ifn_p); 271 } 272 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 273 atomic_subtract_int(&sctppcbinfo.ipi_count_ifas, 1); 274 } 275} 276 277static void 278sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 279{ 280 struct sctp_ifn *found; 281 282 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 283 if (found == NULL) { 284 /* Not in the list.. sorry */ 285 return; 286 } 287 if (hold_addr_lock == 0) 288 SCTP_IPI_ADDR_LOCK(); 289 LIST_REMOVE(sctp_ifnp, next_bucket); 290 LIST_REMOVE(sctp_ifnp, next_ifn); 291 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 292 sctp_ifnp->registered_af); 293 if (hold_addr_lock == 0) 294 SCTP_IPI_ADDR_UNLOCK(); 295 /* Take away the reference, and possibly free it */ 296 sctp_free_ifn(sctp_ifnp); 297} 298 299 300struct sctp_ifa * 301sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 302 uint32_t ifn_type, const char *if_name, 303 void *ifa, struct sockaddr *addr, uint32_t ifa_flags, 304 int dynamic_add) 305{ 306 struct sctp_vrf *vrf; 307 struct sctp_ifn *sctp_ifnp = NULL; 308 struct sctp_ifa *sctp_ifap = NULL; 309 struct sctp_ifalist *hash_addr_head; 310 struct sctp_ifnlist *hash_ifn_head; 311 uint32_t hash_of_addr; 312 int new_ifn_af = 0; 313 314 /* How granular do we need the locks to be here? */ 315 SCTP_IPI_ADDR_LOCK(); 316 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 317 if (sctp_ifnp) { 318 vrf = sctp_ifnp->vrf; 319 } else { 320 vrf = sctp_find_vrf(vrf_id); 321 if (vrf == NULL) { 322 vrf = sctp_allocate_vrf(vrf_id); 323 if (vrf == NULL) { 324 SCTP_IPI_ADDR_UNLOCK(); 325 return (NULL); 326 } 327 } 328 } 329 if (sctp_ifnp == NULL) { 330 /* 331 * build one and add it, can't hold lock until after malloc 332 * done though. 333 */ 334 SCTP_IPI_ADDR_UNLOCK(); 335 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, sizeof(struct sctp_ifn), SCTP_M_IFN); 336 if (sctp_ifnp == NULL) { 337#ifdef INVARIANTS 338 panic("No memory for IFN:%u", sctp_ifnp->ifn_index); 339#endif 340 return (NULL); 341 } 342 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 343 sctp_ifnp->ifn_index = ifn_index; 344 sctp_ifnp->ifn_p = ifn; 345 sctp_ifnp->ifn_type = ifn_type; 346 sctp_ifnp->refcount = 1; 347 sctp_ifnp->vrf = vrf; 348 349 atomic_add_int(&vrf->refcount, 1); 350 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 351 if (if_name != NULL) { 352 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ); 353 } else { 354 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ)); 355 } 356 hash_ifn_head = &sctppcbinfo.vrf_ifn_hash[(ifn_index & sctppcbinfo.vrf_ifn_hashmark)]; 357 LIST_INIT(&sctp_ifnp->ifalist); 358 SCTP_IPI_ADDR_LOCK(); 359 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 360 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 361 atomic_add_int(&sctppcbinfo.ipi_count_ifns, 1); 362 new_ifn_af = 1; 363 } 364 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1); 365 if (sctp_ifap) { 366 /* Hmm, it already exists? */ 367 if ((sctp_ifap->ifn_p) && 368 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 369 if (new_ifn_af) { 370 /* Remove the created one that we don't want */ 371 sctp_delete_ifn(sctp_ifap->ifn_p, 1); 372 } 373 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 374 /* easy to solve, just switch back to active */ 375 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 376 sctp_ifap->ifn_p = sctp_ifnp; 377 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 378 exit_stage_left: 379 SCTP_IPI_ADDR_UNLOCK(); 380 return (sctp_ifap); 381 } else { 382 goto exit_stage_left; 383 } 384 } else { 385 if (sctp_ifap->ifn_p) { 386 /* 387 * The first IFN gets the address, 388 * duplicates are ignored. 389 */ 390 if (new_ifn_af) { 391 /* 392 * Remove the created one that we 393 * don't want 394 */ 395 sctp_delete_ifn(sctp_ifap->ifn_p, 1); 396 } 397 goto exit_stage_left; 398 } else { 399 /* repair ifnp which was NULL ? */ 400 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 401 sctp_ifap->ifn_p = sctp_ifnp; 402 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 403 } 404 goto exit_stage_left; 405 } 406 } 407 SCTP_IPI_ADDR_UNLOCK(); 408 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 409 if (sctp_ifap == NULL) { 410#ifdef INVARIANTS 411 panic("No memory for IFA"); 412#endif 413 return (NULL); 414 } 415 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 416 sctp_ifap->ifn_p = sctp_ifnp; 417 atomic_add_int(&sctp_ifnp->refcount, 1); 418 sctp_ifap->vrf_id = vrf_id; 419 sctp_ifap->ifa = ifa; 420 memcpy(&sctp_ifap->address, addr, addr->sa_len); 421 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 422 sctp_ifap->flags = ifa_flags; 423 /* Set scope */ 424 if (sctp_ifap->address.sa.sa_family == AF_INET) { 425 struct sockaddr_in *sin; 426 427 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 428 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 429 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 430 sctp_ifap->src_is_loop = 1; 431 } 432 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 433 sctp_ifap->src_is_priv = 1; 434 } 435 sctp_ifnp->num_v4++; 436 if (new_ifn_af) 437 new_ifn_af = AF_INET; 438 } else if (sctp_ifap->address.sa.sa_family == AF_INET6) { 439 /* ok to use deprecated addresses? */ 440 struct sockaddr_in6 *sin6; 441 442 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 443 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 444 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 445 sctp_ifap->src_is_loop = 1; 446 } 447 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 448 sctp_ifap->src_is_priv = 1; 449 } 450 sctp_ifnp->num_v6++; 451 if (new_ifn_af) 452 new_ifn_af = AF_INET6; 453 } else { 454 new_ifn_af = 0; 455 } 456 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 457 458 if ((sctp_ifap->src_is_priv == 0) && 459 (sctp_ifap->src_is_loop == 0)) { 460 sctp_ifap->src_is_glob = 1; 461 } 462 SCTP_IPI_ADDR_LOCK(); 463 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 464 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 465 sctp_ifap->refcount = 1; 466 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 467 sctp_ifnp->ifa_count++; 468 vrf->total_ifa_count++; 469 atomic_add_int(&sctppcbinfo.ipi_count_ifas, 1); 470 if (new_ifn_af) { 471 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 472 sctp_ifnp->registered_af = new_ifn_af; 473 } 474 SCTP_IPI_ADDR_UNLOCK(); 475 if (dynamic_add) { 476 /* 477 * Bump up the refcount so that when the timer completes it 478 * will drop back down. 479 */ 480 struct sctp_laddr *wi; 481 482 atomic_add_int(&sctp_ifap->refcount, 1); 483 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 484 if (wi == NULL) { 485 /* 486 * Gak, what can we do? We have lost an address 487 * change can you say HOSED? 488 */ 489 SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n"); 490 /* Opps, must decrement the count */ 491 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index); 492 return (NULL); 493 } 494 SCTP_INCR_LADDR_COUNT(); 495 bzero(wi, sizeof(*wi)); 496 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 497 wi->ifa = sctp_ifap; 498 wi->action = SCTP_ADD_IP_ADDRESS; 499 SCTP_IPI_ITERATOR_WQ_LOCK(); 500 /* 501 * Should this really be a tailq? As it is we will process 502 * the newest first :-0 503 */ 504 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr); 505 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 506 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 507 (struct sctp_inpcb *)NULL, 508 (struct sctp_tcb *)NULL, 509 (struct sctp_nets *)NULL); 510 } else { 511 /* it's ready for use */ 512 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 513 } 514 return (sctp_ifap); 515} 516 517void 518sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 519 uint32_t ifn_index) 520{ 521 struct sctp_vrf *vrf; 522 struct sctp_ifa *sctp_ifap = NULL; 523 524 SCTP_IPI_ADDR_LOCK(); 525 526 vrf = sctp_find_vrf(vrf_id); 527 if (vrf == NULL) { 528 SCTP_PRINTF("Can't find vrf_id:%d\n", vrf_id); 529 goto out_now; 530 } 531 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, 1); 532 if (sctp_ifap) { 533 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 534 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 535 vrf->total_ifa_count--; 536 LIST_REMOVE(sctp_ifap, next_bucket); 537 LIST_REMOVE(sctp_ifap, next_ifa); 538 if (sctp_ifap->ifn_p) { 539 sctp_ifap->ifn_p->ifa_count--; 540 if (sctp_ifap->address.sa.sa_family == AF_INET6) 541 sctp_ifap->ifn_p->num_v6--; 542 else if (sctp_ifap->address.sa.sa_family == AF_INET) 543 sctp_ifap->ifn_p->num_v4--; 544 if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 545 sctp_delete_ifn(sctp_ifap->ifn_p, 1); 546 } else { 547 if ((sctp_ifap->ifn_p->num_v6 == 0) && 548 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 549 SCTP_DEREGISTER_INTERFACE(ifn_index, 550 AF_INET6); 551 SCTP_REGISTER_INTERFACE(ifn_index, 552 AF_INET); 553 sctp_ifap->ifn_p->registered_af = AF_INET; 554 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 555 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 556 SCTP_DEREGISTER_INTERFACE(ifn_index, 557 AF_INET); 558 SCTP_REGISTER_INTERFACE(ifn_index, 559 AF_INET6); 560 sctp_ifap->ifn_p->registered_af = AF_INET6; 561 } 562 } 563 sctp_free_ifn(sctp_ifap->ifn_p); 564 sctp_ifap->ifn_p = NULL; 565 } 566 } 567#ifdef SCTP_DEBUG 568 else { 569 SCTPDBG(SCTP_DEBUG_PCB1, "Del Addr-ifn:%d Could not find address:", 570 ifn_index); 571 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 572 } 573#endif 574 575out_now: 576 SCTP_IPI_ADDR_UNLOCK(); 577 if (sctp_ifap) { 578 struct sctp_laddr *wi; 579 580 wi = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 581 if (wi == NULL) { 582 /* 583 * Gak, what can we do? We have lost an address 584 * change can you say HOSED? 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB1, "Lost and address change ???\n"); 587 588 /* Opps, must decrement the count */ 589 sctp_free_ifa(sctp_ifap); 590 return; 591 } 592 SCTP_INCR_LADDR_COUNT(); 593 bzero(wi, sizeof(*wi)); 594 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 595 wi->ifa = sctp_ifap; 596 wi->action = SCTP_DEL_IP_ADDRESS; 597 SCTP_IPI_ITERATOR_WQ_LOCK(); 598 /* 599 * Should this really be a tailq? As it is we will process 600 * the newest first :-0 601 */ 602 LIST_INSERT_HEAD(&sctppcbinfo.addr_wq, wi, sctp_nxt_addr); 603 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 604 605 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 606 (struct sctp_inpcb *)NULL, 607 (struct sctp_tcb *)NULL, 608 (struct sctp_nets *)NULL); 609 } 610 return; 611} 612 613 614 615static struct sctp_tcb * 616sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 617 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 618{ 619 /**** ASSUMSES THE CALLER holds the INP_INFO_RLOCK */ 620 /* 621 * If we support the TCP model, then we must now dig through to see 622 * if we can find our endpoint in the list of tcp ep's. 623 */ 624 uint16_t lport, rport; 625 struct sctppcbhead *ephead; 626 struct sctp_inpcb *inp; 627 struct sctp_laddr *laddr; 628 struct sctp_tcb *stcb; 629 struct sctp_nets *net; 630 631 if ((to == NULL) || (from == NULL)) { 632 return (NULL); 633 } 634 if (to->sa_family == AF_INET && from->sa_family == AF_INET) { 635 lport = ((struct sockaddr_in *)to)->sin_port; 636 rport = ((struct sockaddr_in *)from)->sin_port; 637 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) { 638 lport = ((struct sockaddr_in6 *)to)->sin6_port; 639 rport = ((struct sockaddr_in6 *)from)->sin6_port; 640 } else { 641 return NULL; 642 } 643 ephead = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR( 644 (lport + rport), sctppcbinfo.hashtcpmark)]; 645 /* 646 * Ok now for each of the guys in this bucket we must look and see: 647 * - Does the remote port match. - Does there single association's 648 * addresses match this address (to). If so we update p_ep to point 649 * to this ep and return the tcb from it. 650 */ 651 LIST_FOREACH(inp, ephead, sctp_hash) { 652 SCTP_INP_RLOCK(inp); 653 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 654 SCTP_INP_RUNLOCK(inp); 655 continue; 656 } 657 if (lport != inp->sctp_lport) { 658 SCTP_INP_RUNLOCK(inp); 659 continue; 660 } 661 if (inp->def_vrf_id != vrf_id) { 662 SCTP_INP_RUNLOCK(inp); 663 continue; 664 } 665 /* check to see if the ep has one of the addresses */ 666 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 667 /* We are NOT bound all, so look further */ 668 int match = 0; 669 670 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 671 672 if (laddr->ifa == NULL) { 673 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 674 continue; 675 } 676 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 677 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 678 continue; 679 } 680 if (laddr->ifa->address.sa.sa_family == 681 to->sa_family) { 682 /* see if it matches */ 683 struct sockaddr_in *intf_addr, *sin; 684 685 intf_addr = &laddr->ifa->address.sin; 686 sin = (struct sockaddr_in *)to; 687 if (from->sa_family == AF_INET) { 688 if (sin->sin_addr.s_addr == 689 intf_addr->sin_addr.s_addr) { 690 match = 1; 691 break; 692 } 693 } else { 694 struct sockaddr_in6 *intf_addr6; 695 struct sockaddr_in6 *sin6; 696 697 sin6 = (struct sockaddr_in6 *) 698 to; 699 intf_addr6 = &laddr->ifa->address.sin6; 700 701 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 702 &intf_addr6->sin6_addr)) { 703 match = 1; 704 break; 705 } 706 } 707 } 708 } 709 if (match == 0) { 710 /* This endpoint does not have this address */ 711 SCTP_INP_RUNLOCK(inp); 712 continue; 713 } 714 } 715 /* 716 * Ok if we hit here the ep has the address, does it hold 717 * the tcb? 718 */ 719 720 stcb = LIST_FIRST(&inp->sctp_asoc_list); 721 if (stcb == NULL) { 722 SCTP_INP_RUNLOCK(inp); 723 continue; 724 } 725 SCTP_TCB_LOCK(stcb); 726 if (stcb->rport != rport) { 727 /* remote port does not match. */ 728 SCTP_TCB_UNLOCK(stcb); 729 SCTP_INP_RUNLOCK(inp); 730 continue; 731 } 732 /* Does this TCB have a matching address? */ 733 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 734 735 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 736 /* not the same family, can't be a match */ 737 continue; 738 } 739 if (from->sa_family == AF_INET) { 740 struct sockaddr_in *sin, *rsin; 741 742 sin = (struct sockaddr_in *)&net->ro._l_addr; 743 rsin = (struct sockaddr_in *)from; 744 if (sin->sin_addr.s_addr == 745 rsin->sin_addr.s_addr) { 746 /* found it */ 747 if (netp != NULL) { 748 *netp = net; 749 } 750 /* Update the endpoint pointer */ 751 *inp_p = inp; 752 SCTP_INP_RUNLOCK(inp); 753 return (stcb); 754 } 755 } else { 756 struct sockaddr_in6 *sin6, *rsin6; 757 758 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 759 rsin6 = (struct sockaddr_in6 *)from; 760 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 761 &rsin6->sin6_addr)) { 762 /* found it */ 763 if (netp != NULL) { 764 *netp = net; 765 } 766 /* Update the endpoint pointer */ 767 *inp_p = inp; 768 SCTP_INP_RUNLOCK(inp); 769 return (stcb); 770 } 771 } 772 } 773 SCTP_TCB_UNLOCK(stcb); 774 SCTP_INP_RUNLOCK(inp); 775 } 776 return (NULL); 777} 778 779/* 780 * rules for use 781 * 782 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 783 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 784 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 785 * NULL. 786 */ 787 788struct sctp_tcb * 789sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 790 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 791{ 792 struct sctpasochead *head; 793 struct sctp_inpcb *inp; 794 struct sctp_tcb *stcb = NULL; 795 struct sctp_nets *net; 796 uint16_t rport; 797 798 inp = *inp_p; 799 if (remote->sa_family == AF_INET) { 800 rport = (((struct sockaddr_in *)remote)->sin_port); 801 } else if (remote->sa_family == AF_INET6) { 802 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 803 } else { 804 return (NULL); 805 } 806 if (locked_tcb) { 807 /* 808 * UN-lock so we can do proper locking here this occurs when 809 * called from load_addresses_from_init. 810 */ 811 SCTP_TCB_UNLOCK(locked_tcb); 812 } 813 SCTP_INP_INFO_RLOCK(); 814 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 815 /*- 816 * Now either this guy is our listener or it's the 817 * connector. If it is the one that issued the connect, then 818 * it's only chance is to be the first TCB in the list. If 819 * it is the acceptor, then do the special_lookup to hash 820 * and find the real inp. 821 */ 822 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 823 /* to is peer addr, from is my addr */ 824 stcb = sctp_tcb_special_locate(inp_p, remote, local, 825 netp, inp->def_vrf_id); 826 if ((stcb != NULL) && (locked_tcb == NULL)) { 827 /* we have a locked tcb, lower refcount */ 828 SCTP_INP_WLOCK(inp); 829 SCTP_INP_DECR_REF(inp); 830 SCTP_INP_WUNLOCK(inp); 831 } 832 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 833 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 834 SCTP_TCB_LOCK(locked_tcb); 835 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 836 } 837 SCTP_INP_INFO_RUNLOCK(); 838 return (stcb); 839 } else { 840 SCTP_INP_WLOCK(inp); 841 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 842 goto null_return; 843 } 844 stcb = LIST_FIRST(&inp->sctp_asoc_list); 845 if (stcb == NULL) { 846 goto null_return; 847 } 848 SCTP_TCB_LOCK(stcb); 849 if (stcb->rport != rport) { 850 /* remote port does not match. */ 851 SCTP_TCB_UNLOCK(stcb); 852 goto null_return; 853 } 854 /* now look at the list of remote addresses */ 855 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 856#ifdef INVARIANTS 857 if (net == (TAILQ_NEXT(net, sctp_next))) { 858 panic("Corrupt net list"); 859 } 860#endif 861 if (net->ro._l_addr.sa.sa_family != 862 remote->sa_family) { 863 /* not the same family */ 864 continue; 865 } 866 if (remote->sa_family == AF_INET) { 867 struct sockaddr_in *sin, *rsin; 868 869 sin = (struct sockaddr_in *) 870 &net->ro._l_addr; 871 rsin = (struct sockaddr_in *)remote; 872 if (sin->sin_addr.s_addr == 873 rsin->sin_addr.s_addr) { 874 /* found it */ 875 if (netp != NULL) { 876 *netp = net; 877 } 878 if (locked_tcb == NULL) { 879 SCTP_INP_DECR_REF(inp); 880 } else if (locked_tcb != stcb) { 881 SCTP_TCB_LOCK(locked_tcb); 882 } 883 SCTP_INP_WUNLOCK(inp); 884 SCTP_INP_INFO_RUNLOCK(); 885 return (stcb); 886 } 887 } else if (remote->sa_family == AF_INET6) { 888 struct sockaddr_in6 *sin6, *rsin6; 889 890 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 891 rsin6 = (struct sockaddr_in6 *)remote; 892 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 893 &rsin6->sin6_addr)) { 894 /* found it */ 895 if (netp != NULL) { 896 *netp = net; 897 } 898 if (locked_tcb == NULL) { 899 SCTP_INP_DECR_REF(inp); 900 } else if (locked_tcb != stcb) { 901 SCTP_TCB_LOCK(locked_tcb); 902 } 903 SCTP_INP_WUNLOCK(inp); 904 SCTP_INP_INFO_RUNLOCK(); 905 return (stcb); 906 } 907 } 908 } 909 SCTP_TCB_UNLOCK(stcb); 910 } 911 } else { 912 SCTP_INP_WLOCK(inp); 913 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 914 goto null_return; 915 } 916 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 917 inp->sctp_hashmark)]; 918 if (head == NULL) { 919 goto null_return; 920 } 921 LIST_FOREACH(stcb, head, sctp_tcbhash) { 922 if (stcb->rport != rport) { 923 /* remote port does not match */ 924 continue; 925 } 926 /* now look at the list of remote addresses */ 927 SCTP_TCB_LOCK(stcb); 928 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 929#ifdef INVARIANTS 930 if (net == (TAILQ_NEXT(net, sctp_next))) { 931 panic("Corrupt net list"); 932 } 933#endif 934 if (net->ro._l_addr.sa.sa_family != 935 remote->sa_family) { 936 /* not the same family */ 937 continue; 938 } 939 if (remote->sa_family == AF_INET) { 940 struct sockaddr_in *sin, *rsin; 941 942 sin = (struct sockaddr_in *) 943 &net->ro._l_addr; 944 rsin = (struct sockaddr_in *)remote; 945 if (sin->sin_addr.s_addr == 946 rsin->sin_addr.s_addr) { 947 /* found it */ 948 if (netp != NULL) { 949 *netp = net; 950 } 951 if (locked_tcb == NULL) { 952 SCTP_INP_DECR_REF(inp); 953 } else if (locked_tcb != stcb) { 954 SCTP_TCB_LOCK(locked_tcb); 955 } 956 SCTP_INP_WUNLOCK(inp); 957 SCTP_INP_INFO_RUNLOCK(); 958 return (stcb); 959 } 960 } else if (remote->sa_family == AF_INET6) { 961 struct sockaddr_in6 *sin6, *rsin6; 962 963 sin6 = (struct sockaddr_in6 *) 964 &net->ro._l_addr; 965 rsin6 = (struct sockaddr_in6 *)remote; 966 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 967 &rsin6->sin6_addr)) { 968 /* found it */ 969 if (netp != NULL) { 970 *netp = net; 971 } 972 if (locked_tcb == NULL) { 973 SCTP_INP_DECR_REF(inp); 974 } else if (locked_tcb != stcb) { 975 SCTP_TCB_LOCK(locked_tcb); 976 } 977 SCTP_INP_WUNLOCK(inp); 978 SCTP_INP_INFO_RUNLOCK(); 979 return (stcb); 980 } 981 } 982 } 983 SCTP_TCB_UNLOCK(stcb); 984 } 985 } 986null_return: 987 /* clean up for returning null */ 988 if (locked_tcb) { 989 SCTP_TCB_LOCK(locked_tcb); 990 } 991 SCTP_INP_WUNLOCK(inp); 992 SCTP_INP_INFO_RUNLOCK(); 993 /* not found */ 994 return (NULL); 995} 996 997/* 998 * Find an association for a specific endpoint using the association id given 999 * out in the COMM_UP notification 1000 */ 1001 1002struct sctp_tcb * 1003sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1004{ 1005 /* 1006 * Use my the assoc_id to find a endpoint 1007 */ 1008 struct sctpasochead *head; 1009 struct sctp_tcb *stcb; 1010 uint32_t id; 1011 1012 if (asoc_id == 0 || inp == NULL) { 1013 return (NULL); 1014 } 1015 SCTP_INP_INFO_RLOCK(); 1016 id = (uint32_t) asoc_id; 1017 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(id, 1018 sctppcbinfo.hashasocmark)]; 1019 if (head == NULL) { 1020 /* invalid id TSNH */ 1021 SCTP_INP_INFO_RUNLOCK(); 1022 return (NULL); 1023 } 1024 LIST_FOREACH(stcb, head, sctp_asocs) { 1025 SCTP_INP_RLOCK(stcb->sctp_ep); 1026 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1027 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1028 SCTP_INP_INFO_RUNLOCK(); 1029 return (NULL); 1030 } 1031 if (stcb->asoc.assoc_id == id) { 1032 /* candidate */ 1033 if (inp != stcb->sctp_ep) { 1034 /* 1035 * some other guy has the same id active (id 1036 * collision ??). 1037 */ 1038 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1039 continue; 1040 } 1041 if (want_lock) { 1042 SCTP_TCB_LOCK(stcb); 1043 } 1044 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1045 SCTP_INP_INFO_RUNLOCK(); 1046 return (stcb); 1047 } 1048 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1049 } 1050 /* Ok if we missed here, lets try the restart hash */ 1051 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(id, sctppcbinfo.hashrestartmark)]; 1052 if (head == NULL) { 1053 /* invalid id TSNH */ 1054 SCTP_INP_INFO_RUNLOCK(); 1055 return (NULL); 1056 } 1057 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { 1058 SCTP_INP_RLOCK(stcb->sctp_ep); 1059 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1060 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1061 continue; 1062 } 1063 if (want_lock) { 1064 SCTP_TCB_LOCK(stcb); 1065 } 1066 if (stcb->asoc.assoc_id == id) { 1067 /* candidate */ 1068 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1069 if (inp != stcb->sctp_ep) { 1070 /* 1071 * some other guy has the same id active (id 1072 * collision ??). 1073 */ 1074 if (want_lock) { 1075 SCTP_TCB_UNLOCK(stcb); 1076 } 1077 continue; 1078 } 1079 SCTP_INP_INFO_RUNLOCK(); 1080 return (stcb); 1081 } else { 1082 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1083 } 1084 if (want_lock) { 1085 SCTP_TCB_UNLOCK(stcb); 1086 } 1087 } 1088 SCTP_INP_INFO_RUNLOCK(); 1089 return (NULL); 1090} 1091 1092 1093static struct sctp_inpcb * 1094sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1095 uint16_t lport, uint32_t vrf_id) 1096{ 1097 struct sctp_inpcb *inp; 1098 struct sockaddr_in *sin; 1099 struct sockaddr_in6 *sin6; 1100 struct sctp_laddr *laddr; 1101 int fnd; 1102 1103 /* 1104 * Endpoing probe expects that the INP_INFO is locked. 1105 */ 1106 if (nam->sa_family == AF_INET) { 1107 sin = (struct sockaddr_in *)nam; 1108 sin6 = NULL; 1109 } else if (nam->sa_family == AF_INET6) { 1110 sin6 = (struct sockaddr_in6 *)nam; 1111 sin = NULL; 1112 } else { 1113 /* unsupported family */ 1114 return (NULL); 1115 } 1116 if (head == NULL) 1117 return (NULL); 1118 LIST_FOREACH(inp, head, sctp_hash) { 1119 SCTP_INP_RLOCK(inp); 1120 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1121 SCTP_INP_RUNLOCK(inp); 1122 continue; 1123 } 1124 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1125 (inp->sctp_lport == lport)) { 1126 /* got it */ 1127 if ((nam->sa_family == AF_INET) && 1128 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1129 SCTP_IPV6_V6ONLY(inp)) { 1130 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1131 SCTP_INP_RUNLOCK(inp); 1132 continue; 1133 } 1134 /* A V6 address and the endpoint is NOT bound V6 */ 1135 if (nam->sa_family == AF_INET6 && 1136 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1137 SCTP_INP_RUNLOCK(inp); 1138 continue; 1139 } 1140 /* does a VRF id match? */ 1141 fnd = 0; 1142 if (inp->def_vrf_id == vrf_id) 1143 fnd = 1; 1144 1145 SCTP_INP_RUNLOCK(inp); 1146 if (!fnd) 1147 continue; 1148 return (inp); 1149 } 1150 SCTP_INP_RUNLOCK(inp); 1151 } 1152 1153 if ((nam->sa_family == AF_INET) && 1154 (sin->sin_addr.s_addr == INADDR_ANY)) { 1155 /* Can't hunt for one that has no address specified */ 1156 return (NULL); 1157 } else if ((nam->sa_family == AF_INET6) && 1158 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 1159 /* Can't hunt for one that has no address specified */ 1160 return (NULL); 1161 } 1162 /* 1163 * ok, not bound to all so see if we can find a EP bound to this 1164 * address. 1165 */ 1166 LIST_FOREACH(inp, head, sctp_hash) { 1167 SCTP_INP_RLOCK(inp); 1168 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1169 SCTP_INP_RUNLOCK(inp); 1170 continue; 1171 } 1172 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 /* 1177 * Ok this could be a likely candidate, look at all of its 1178 * addresses 1179 */ 1180 if (inp->sctp_lport != lport) { 1181 SCTP_INP_RUNLOCK(inp); 1182 continue; 1183 } 1184 /* does a VRF id match? */ 1185 fnd = 0; 1186 if (inp->def_vrf_id == vrf_id) 1187 fnd = 1; 1188 1189 if (!fnd) { 1190 SCTP_INP_RUNLOCK(inp); 1191 continue; 1192 } 1193 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1194 if (laddr->ifa == NULL) { 1195 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1196 __FUNCTION__); 1197 continue; 1198 } 1199 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1200 laddr->ifa); 1201 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1202 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1203 continue; 1204 } 1205 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1206 /* possible, see if it matches */ 1207 struct sockaddr_in *intf_addr; 1208 1209 intf_addr = &laddr->ifa->address.sin; 1210 if (nam->sa_family == AF_INET) { 1211 if (sin->sin_addr.s_addr == 1212 intf_addr->sin_addr.s_addr) { 1213 SCTP_INP_RUNLOCK(inp); 1214 return (inp); 1215 } 1216 } else if (nam->sa_family == AF_INET6) { 1217 struct sockaddr_in6 *intf_addr6; 1218 1219 intf_addr6 = &laddr->ifa->address.sin6; 1220 if (SCTP6_ARE_ADDR_EQUAL(&sin6->sin6_addr, 1221 &intf_addr6->sin6_addr)) { 1222 SCTP_INP_RUNLOCK(inp); 1223 return (inp); 1224 } 1225 } 1226 } 1227 } 1228 SCTP_INP_RUNLOCK(inp); 1229 } 1230 return (NULL); 1231} 1232 1233 1234struct sctp_inpcb * 1235sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1236 uint32_t vrf_id) 1237{ 1238 /* 1239 * First we check the hash table to see if someone has this port 1240 * bound with just the port. 1241 */ 1242 struct sctp_inpcb *inp; 1243 struct sctppcbhead *head; 1244 struct sockaddr_in *sin; 1245 struct sockaddr_in6 *sin6; 1246 int lport; 1247 1248 if (nam->sa_family == AF_INET) { 1249 sin = (struct sockaddr_in *)nam; 1250 lport = ((struct sockaddr_in *)nam)->sin_port; 1251 } else if (nam->sa_family == AF_INET6) { 1252 sin6 = (struct sockaddr_in6 *)nam; 1253 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1254 } else { 1255 /* unsupported family */ 1256 return (NULL); 1257 } 1258 /* 1259 * I could cheat here and just cast to one of the types but we will 1260 * do it right. It also provides the check against an Unsupported 1261 * type too. 1262 */ 1263 /* Find the head of the ALLADDR chain */ 1264 if (have_lock == 0) { 1265 SCTP_INP_INFO_RLOCK(); 1266 1267 } 1268 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 1269 sctppcbinfo.hashmark)]; 1270 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1271 1272 /* 1273 * If the TCP model exists it could be that the main listening 1274 * endpoint is gone but there exists a connected socket for this guy 1275 * yet. If so we can return the first one that we find. This may NOT 1276 * be the correct one but the sctp_findassociation_ep_addr has 1277 * further code to look at all TCP models. 1278 */ 1279 if (inp == NULL && find_tcp_pool) { 1280 unsigned int i; 1281 1282 for (i = 0; i < sctppcbinfo.hashtblsize; i++) { 1283 /* 1284 * This is real gross, but we do NOT have a remote 1285 * port at this point depending on who is calling. 1286 * We must therefore look for ANY one that matches 1287 * our local port :/ 1288 */ 1289 head = &sctppcbinfo.sctp_tcpephash[i]; 1290 if (LIST_FIRST(head)) { 1291 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1292 if (inp) { 1293 /* Found one */ 1294 break; 1295 } 1296 } 1297 } 1298 } 1299 if (inp) { 1300 SCTP_INP_INCR_REF(inp); 1301 } 1302 if (have_lock == 0) { 1303 SCTP_INP_INFO_RUNLOCK(); 1304 } 1305 return (inp); 1306} 1307 1308/* 1309 * Find an association for an endpoint with the pointer to whom you want to 1310 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1311 * need to change the *to to some other struct like a mbuf... 1312 */ 1313struct sctp_tcb * 1314sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1315 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1316 uint32_t vrf_id) 1317{ 1318 struct sctp_inpcb *inp = NULL; 1319 struct sctp_tcb *retval; 1320 1321 SCTP_INP_INFO_RLOCK(); 1322 if (find_tcp_pool) { 1323 if (inp_p != NULL) { 1324 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1325 vrf_id); 1326 } else { 1327 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1328 vrf_id); 1329 } 1330 if (retval != NULL) { 1331 SCTP_INP_INFO_RUNLOCK(); 1332 return (retval); 1333 } 1334 } 1335 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1336 if (inp_p != NULL) { 1337 *inp_p = inp; 1338 } 1339 SCTP_INP_INFO_RUNLOCK(); 1340 1341 if (inp == NULL) { 1342 return (NULL); 1343 } 1344 /* 1345 * ok, we have an endpoint, now lets find the assoc for it (if any) 1346 * we now place the source address or from in the to of the find 1347 * endpoint call. Since in reality this chain is used from the 1348 * inbound packet side. 1349 */ 1350 if (inp_p != NULL) { 1351 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1352 NULL); 1353 } else { 1354 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1355 NULL); 1356 } 1357 return retval; 1358} 1359 1360 1361/* 1362 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1363 * find all addresses that the sender has specified in any address list. Each 1364 * address will be used to lookup the TCB and see if one exits. 1365 */ 1366static struct sctp_tcb * 1367sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1368 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1369 struct sockaddr *dest) 1370{ 1371 struct sockaddr_in sin4; 1372 struct sockaddr_in6 sin6; 1373 struct sctp_paramhdr *phdr, parm_buf; 1374 struct sctp_tcb *retval; 1375 uint32_t ptype, plen; 1376 1377 memset(&sin4, 0, sizeof(sin4)); 1378 memset(&sin6, 0, sizeof(sin6)); 1379 sin4.sin_len = sizeof(sin4); 1380 sin4.sin_family = AF_INET; 1381 sin4.sin_port = sh->src_port; 1382 sin6.sin6_len = sizeof(sin6); 1383 sin6.sin6_family = AF_INET6; 1384 sin6.sin6_port = sh->src_port; 1385 1386 retval = NULL; 1387 offset += sizeof(struct sctp_init_chunk); 1388 1389 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1390 while (phdr != NULL) { 1391 /* now we must see if we want the parameter */ 1392 ptype = ntohs(phdr->param_type); 1393 plen = ntohs(phdr->param_length); 1394 if (plen == 0) { 1395 break; 1396 } 1397 if (ptype == SCTP_IPV4_ADDRESS && 1398 plen == sizeof(struct sctp_ipv4addr_param)) { 1399 /* Get the rest of the address */ 1400 struct sctp_ipv4addr_param ip4_parm, *p4; 1401 1402 phdr = sctp_get_next_param(m, offset, 1403 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1404 if (phdr == NULL) { 1405 return (NULL); 1406 } 1407 p4 = (struct sctp_ipv4addr_param *)phdr; 1408 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 1409 /* look it up */ 1410 retval = sctp_findassociation_ep_addr(inp_p, 1411 (struct sockaddr *)&sin4, netp, dest, NULL); 1412 if (retval != NULL) { 1413 return (retval); 1414 } 1415 } else if (ptype == SCTP_IPV6_ADDRESS && 1416 plen == sizeof(struct sctp_ipv6addr_param)) { 1417 /* Get the rest of the address */ 1418 struct sctp_ipv6addr_param ip6_parm, *p6; 1419 1420 phdr = sctp_get_next_param(m, offset, 1421 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 1422 if (phdr == NULL) { 1423 return (NULL); 1424 } 1425 p6 = (struct sctp_ipv6addr_param *)phdr; 1426 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 1427 /* look it up */ 1428 retval = sctp_findassociation_ep_addr(inp_p, 1429 (struct sockaddr *)&sin6, netp, dest, NULL); 1430 if (retval != NULL) { 1431 return (retval); 1432 } 1433 } 1434 offset += SCTP_SIZE32(plen); 1435 phdr = sctp_get_next_param(m, offset, &parm_buf, 1436 sizeof(parm_buf)); 1437 } 1438 return (NULL); 1439} 1440 1441 1442static struct sctp_tcb * 1443sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag, 1444 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 1445 uint16_t lport, int skip_src_check) 1446{ 1447 /* 1448 * Use my vtag to hash. If we find it we then verify the source addr 1449 * is in the assoc. If all goes well we save a bit on rec of a 1450 * packet. 1451 */ 1452 struct sctpasochead *head; 1453 struct sctp_nets *net; 1454 struct sctp_tcb *stcb; 1455 1456 *netp = NULL; 1457 *inp_p = NULL; 1458 SCTP_INP_INFO_RLOCK(); 1459 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(vtag, 1460 sctppcbinfo.hashasocmark)]; 1461 if (head == NULL) { 1462 /* invalid vtag */ 1463 SCTP_INP_INFO_RUNLOCK(); 1464 return (NULL); 1465 } 1466 LIST_FOREACH(stcb, head, sctp_asocs) { 1467 SCTP_INP_RLOCK(stcb->sctp_ep); 1468 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1469 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1470 continue; 1471 } 1472 SCTP_TCB_LOCK(stcb); 1473 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1474 if (stcb->asoc.my_vtag == vtag) { 1475 /* candidate */ 1476 if (stcb->rport != rport) { 1477 /* 1478 * we could remove this if vtags are unique 1479 * across the system. 1480 */ 1481 SCTP_TCB_UNLOCK(stcb); 1482 continue; 1483 } 1484 if (stcb->sctp_ep->sctp_lport != lport) { 1485 /* 1486 * we could remove this if vtags are unique 1487 * across the system. 1488 */ 1489 SCTP_TCB_UNLOCK(stcb); 1490 continue; 1491 } 1492 if (skip_src_check) { 1493 *netp = NULL; /* unknown */ 1494 if (inp_p) 1495 *inp_p = stcb->sctp_ep; 1496 SCTP_INP_INFO_RUNLOCK(); 1497 return (stcb); 1498 } 1499 net = sctp_findnet(stcb, from); 1500 if (net) { 1501 /* yep its him. */ 1502 *netp = net; 1503 SCTP_STAT_INCR(sctps_vtagexpress); 1504 *inp_p = stcb->sctp_ep; 1505 SCTP_INP_INFO_RUNLOCK(); 1506 return (stcb); 1507 } else { 1508 /* 1509 * not him, this should only happen in rare 1510 * cases so I peg it. 1511 */ 1512 SCTP_STAT_INCR(sctps_vtagbogus); 1513 } 1514 } 1515 SCTP_TCB_UNLOCK(stcb); 1516 } 1517 SCTP_INP_INFO_RUNLOCK(); 1518 return (NULL); 1519} 1520 1521/* 1522 * Find an association with the pointer to the inbound IP packet. This can be 1523 * a IPv4 or IPv6 packet. 1524 */ 1525struct sctp_tcb * 1526sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 1527 struct sctphdr *sh, struct sctp_chunkhdr *ch, 1528 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 1529{ 1530 int find_tcp_pool; 1531 struct ip *iph; 1532 struct sctp_tcb *retval; 1533 struct sockaddr_storage to_store, from_store; 1534 struct sockaddr *to = (struct sockaddr *)&to_store; 1535 struct sockaddr *from = (struct sockaddr *)&from_store; 1536 struct sctp_inpcb *inp; 1537 1538 iph = mtod(m, struct ip *); 1539 if (iph->ip_v == IPVERSION) { 1540 /* its IPv4 */ 1541 struct sockaddr_in *from4; 1542 1543 from4 = (struct sockaddr_in *)&from_store; 1544 bzero(from4, sizeof(*from4)); 1545 from4->sin_family = AF_INET; 1546 from4->sin_len = sizeof(struct sockaddr_in); 1547 from4->sin_addr.s_addr = iph->ip_src.s_addr; 1548 from4->sin_port = sh->src_port; 1549 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1550 /* its IPv6 */ 1551 struct ip6_hdr *ip6; 1552 struct sockaddr_in6 *from6; 1553 1554 ip6 = mtod(m, struct ip6_hdr *); 1555 from6 = (struct sockaddr_in6 *)&from_store; 1556 bzero(from6, sizeof(*from6)); 1557 from6->sin6_family = AF_INET6; 1558 from6->sin6_len = sizeof(struct sockaddr_in6); 1559 from6->sin6_addr = ip6->ip6_src; 1560 from6->sin6_port = sh->src_port; 1561 /* Get the scopes in properly to the sin6 addr's */ 1562 /* we probably don't need these operations */ 1563 (void)sa6_recoverscope(from6); 1564 sa6_embedscope(from6, ip6_use_defzone); 1565 } else { 1566 /* Currently not supported. */ 1567 return (NULL); 1568 } 1569 if (sh->v_tag) { 1570 /* we only go down this path if vtag is non-zero */ 1571 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag), 1572 inp_p, netp, sh->src_port, sh->dest_port, 0); 1573 if (retval) { 1574 return (retval); 1575 } 1576 } 1577 if (iph->ip_v == IPVERSION) { 1578 /* its IPv4 */ 1579 struct sockaddr_in *to4; 1580 1581 to4 = (struct sockaddr_in *)&to_store; 1582 bzero(to4, sizeof(*to4)); 1583 to4->sin_family = AF_INET; 1584 to4->sin_len = sizeof(struct sockaddr_in); 1585 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 1586 to4->sin_port = sh->dest_port; 1587 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1588 /* its IPv6 */ 1589 struct ip6_hdr *ip6; 1590 struct sockaddr_in6 *to6; 1591 1592 ip6 = mtod(m, struct ip6_hdr *); 1593 to6 = (struct sockaddr_in6 *)&to_store; 1594 bzero(to6, sizeof(*to6)); 1595 to6->sin6_family = AF_INET6; 1596 to6->sin6_len = sizeof(struct sockaddr_in6); 1597 to6->sin6_addr = ip6->ip6_dst; 1598 to6->sin6_port = sh->dest_port; 1599 /* Get the scopes in properly to the sin6 addr's */ 1600 /* we probably don't need these operations */ 1601 (void)sa6_recoverscope(to6); 1602 sa6_embedscope(to6, ip6_use_defzone); 1603 } 1604 find_tcp_pool = 0; 1605 if ((ch->chunk_type != SCTP_INITIATION) && 1606 (ch->chunk_type != SCTP_INITIATION_ACK) && 1607 (ch->chunk_type != SCTP_COOKIE_ACK) && 1608 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 1609 /* Other chunk types go to the tcp pool. */ 1610 find_tcp_pool = 1; 1611 } 1612 if (inp_p) { 1613 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 1614 find_tcp_pool, vrf_id); 1615 inp = *inp_p; 1616 } else { 1617 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 1618 find_tcp_pool, vrf_id); 1619 } 1620 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 1621 if (retval == NULL && inp) { 1622 /* Found a EP but not this address */ 1623 if ((ch->chunk_type == SCTP_INITIATION) || 1624 (ch->chunk_type == SCTP_INITIATION_ACK)) { 1625 /*- 1626 * special hook, we do NOT return linp or an 1627 * association that is linked to an existing 1628 * association that is under the TCP pool (i.e. no 1629 * listener exists). The endpoint finding routine 1630 * will always find a listner before examining the 1631 * TCP pool. 1632 */ 1633 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 1634 if (inp_p) { 1635 *inp_p = NULL; 1636 } 1637 return (NULL); 1638 } 1639 retval = sctp_findassociation_special_addr(m, iphlen, 1640 offset, sh, &inp, netp, to); 1641 if (inp_p != NULL) { 1642 *inp_p = inp; 1643 } 1644 } 1645 } 1646 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 1647 return (retval); 1648} 1649 1650/* 1651 * lookup an association by an ASCONF lookup address. 1652 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 1653 */ 1654struct sctp_tcb * 1655sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 1656 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp) 1657{ 1658 struct sctp_tcb *stcb; 1659 struct sockaddr_in *sin; 1660 struct sockaddr_in6 *sin6; 1661 struct sockaddr_storage local_store, remote_store; 1662 struct ip *iph; 1663 struct sctp_paramhdr parm_buf, *phdr; 1664 int ptype; 1665 int zero_address = 0; 1666 1667 1668 memset(&local_store, 0, sizeof(local_store)); 1669 memset(&remote_store, 0, sizeof(remote_store)); 1670 1671 /* First get the destination address setup too. */ 1672 iph = mtod(m, struct ip *); 1673 if (iph->ip_v == IPVERSION) { 1674 /* its IPv4 */ 1675 sin = (struct sockaddr_in *)&local_store; 1676 sin->sin_family = AF_INET; 1677 sin->sin_len = sizeof(*sin); 1678 sin->sin_port = sh->dest_port; 1679 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 1680 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 1681 /* its IPv6 */ 1682 struct ip6_hdr *ip6; 1683 1684 ip6 = mtod(m, struct ip6_hdr *); 1685 sin6 = (struct sockaddr_in6 *)&local_store; 1686 sin6->sin6_family = AF_INET6; 1687 sin6->sin6_len = sizeof(*sin6); 1688 sin6->sin6_port = sh->dest_port; 1689 sin6->sin6_addr = ip6->ip6_dst; 1690 } else { 1691 return NULL; 1692 } 1693 1694 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 1695 &parm_buf, sizeof(struct sctp_paramhdr)); 1696 if (phdr == NULL) { 1697 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 1698 __FUNCTION__); 1699 return NULL; 1700 } 1701 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 1702 /* get the correlation address */ 1703 if (ptype == SCTP_IPV6_ADDRESS) { 1704 /* ipv6 address param */ 1705 struct sctp_ipv6addr_param *p6, p6_buf; 1706 1707 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 1708 return NULL; 1709 } 1710 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 1711 offset + sizeof(struct sctp_asconf_chunk), 1712 &p6_buf.ph, sizeof(*p6)); 1713 if (p6 == NULL) { 1714 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 1715 __FUNCTION__); 1716 return (NULL); 1717 } 1718 sin6 = (struct sockaddr_in6 *)&remote_store; 1719 sin6->sin6_family = AF_INET6; 1720 sin6->sin6_len = sizeof(*sin6); 1721 sin6->sin6_port = sh->src_port; 1722 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 1723 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 1724 zero_address = 1; 1725 } else if (ptype == SCTP_IPV4_ADDRESS) { 1726 /* ipv4 address param */ 1727 struct sctp_ipv4addr_param *p4, p4_buf; 1728 1729 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 1730 return NULL; 1731 } 1732 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 1733 offset + sizeof(struct sctp_asconf_chunk), 1734 &p4_buf.ph, sizeof(*p4)); 1735 if (p4 == NULL) { 1736 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 1737 __FUNCTION__); 1738 return (NULL); 1739 } 1740 sin = (struct sockaddr_in *)&remote_store; 1741 sin->sin_family = AF_INET; 1742 sin->sin_len = sizeof(*sin); 1743 sin->sin_port = sh->src_port; 1744 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 1745 if (sin->sin_addr.s_addr == INADDR_ANY) 1746 zero_address = 1; 1747 } else { 1748 /* invalid address param type */ 1749 return NULL; 1750 } 1751 1752 if (zero_address) { 1753 stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p, 1754 netp, sh->src_port, sh->dest_port, 1); 1755 /* 1756 * printf("findassociation_ep_asconf: zero lookup address 1757 * finds stcb 0x%x\n", (uint32_t)stcb); 1758 */ 1759 } else { 1760 stcb = sctp_findassociation_ep_addr(inp_p, 1761 (struct sockaddr *)&remote_store, netp, 1762 (struct sockaddr *)&local_store, NULL); 1763 } 1764 return (stcb); 1765} 1766 1767 1768/* 1769 * allocate a sctp_inpcb and setup a temporary binding to a port/all 1770 * addresses. This way if we don't get a bind we by default pick a ephemeral 1771 * port with all addresses bound. 1772 */ 1773int 1774sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 1775{ 1776 /* 1777 * we get called when a new endpoint starts up. We need to allocate 1778 * the sctp_inpcb structure from the zone and init it. Mark it as 1779 * unbound and find a port that we can use as an ephemeral with 1780 * INADDR_ANY. If the user binds later no problem we can then add in 1781 * the specific addresses. And setup the default parameters for the 1782 * EP. 1783 */ 1784 int i, error; 1785 struct sctp_inpcb *inp; 1786 struct sctp_pcb *m; 1787 struct timeval time; 1788 sctp_sharedkey_t *null_key; 1789 1790 error = 0; 1791 1792 SCTP_INP_INFO_WLOCK(); 1793 inp = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep, struct sctp_inpcb); 1794 if (inp == NULL) { 1795 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 1796 SCTP_INP_INFO_WUNLOCK(); 1797 return (ENOBUFS); 1798 } 1799 /* zap it */ 1800 bzero(inp, sizeof(*inp)); 1801 1802 /* bump generations */ 1803 /* setup socket pointers */ 1804 inp->sctp_socket = so; 1805 inp->ip_inp.inp.inp_socket = so; 1806 1807 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 1808 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 1809 1810#ifdef IPSEC 1811 { 1812 struct inpcbpolicy *pcb_sp = NULL; 1813 1814 error = ipsec_init_policy(so, &pcb_sp); 1815 /* Arrange to share the policy */ 1816 inp->ip_inp.inp.inp_sp = pcb_sp; 1817 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 1818 } 1819 if (error != 0) { 1820 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1821 SCTP_INP_INFO_WUNLOCK(); 1822 return error; 1823 } 1824#endif /* IPSEC */ 1825 SCTP_INCR_EP_COUNT(); 1826 inp->ip_inp.inp.inp_ip_ttl = ip_defttl; 1827 SCTP_INP_INFO_WUNLOCK(); 1828 1829 so->so_pcb = (caddr_t)inp; 1830 1831 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 1832 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 1833 /* UDP style socket */ 1834 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 1835 SCTP_PCB_FLAGS_UNBOUND); 1836 /* Be sure it is NON-BLOCKING IO for UDP */ 1837 /* SCTP_SET_SO_NBIO(so); */ 1838 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 1839 /* TCP style socket */ 1840 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 1841 SCTP_PCB_FLAGS_UNBOUND); 1842 /* Be sure we have blocking IO by default */ 1843 SCTP_CLEAR_SO_NBIO(so); 1844 } else { 1845 /* 1846 * unsupported socket type (RAW, etc)- in case we missed it 1847 * in protosw 1848 */ 1849 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1850 return (EOPNOTSUPP); 1851 } 1852 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 1853 1854 inp->sctp_tcbhash = SCTP_HASH_INIT(sctp_pcbtblsize, 1855 &inp->sctp_hashmark); 1856 if (inp->sctp_tcbhash == NULL) { 1857 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 1858 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1859 return (ENOBUFS); 1860 } 1861 inp->def_vrf_id = vrf_id; 1862 1863 SCTP_INP_INFO_WLOCK(); 1864 SCTP_INP_LOCK_INIT(inp); 1865 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 1866 SCTP_INP_READ_INIT(inp); 1867 SCTP_ASOC_CREATE_LOCK_INIT(inp); 1868 /* lock the new ep */ 1869 SCTP_INP_WLOCK(inp); 1870 1871 /* add it to the info area */ 1872 LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list); 1873 SCTP_INP_INFO_WUNLOCK(); 1874 1875 TAILQ_INIT(&inp->read_queue); 1876 LIST_INIT(&inp->sctp_addr_list); 1877 1878 LIST_INIT(&inp->sctp_asoc_list); 1879 1880#ifdef SCTP_TRACK_FREED_ASOCS 1881 /* TEMP CODE */ 1882 LIST_INIT(&inp->sctp_asoc_free_list); 1883#endif 1884 /* Init the timer structure for signature change */ 1885 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 1886 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 1887 1888 /* now init the actual endpoint default data */ 1889 m = &inp->sctp_ep; 1890 1891 /* setup the base timeout information */ 1892 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 1893 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 1894 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default); 1895 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default); 1896 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default); 1897 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default); 1898 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default); 1899 /* all max/min max are in ms */ 1900 m->sctp_maxrto = sctp_rto_max_default; 1901 m->sctp_minrto = sctp_rto_min_default; 1902 m->initial_rto = sctp_rto_initial_default; 1903 m->initial_init_rto_max = sctp_init_rto_max_default; 1904 m->sctp_sack_freq = sctp_sack_freq_default; 1905 1906 m->max_open_streams_intome = MAX_SCTP_STREAMS; 1907 1908 m->max_init_times = sctp_init_rtx_max_default; 1909 m->max_send_times = sctp_assoc_rtx_max_default; 1910 m->def_net_failure = sctp_path_rtx_max_default; 1911 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 1912 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 1913 m->max_burst = sctp_max_burst_default; 1914 if ((sctp_default_cc_module >= SCTP_CC_RFC2581) && 1915 (sctp_default_cc_module <= SCTP_CC_HTCP)) { 1916 m->sctp_default_cc_module = sctp_default_cc_module; 1917 } else { 1918 /* sysctl done with invalid value, set to 2581 */ 1919 m->sctp_default_cc_module = SCTP_CC_RFC2581; 1920 } 1921 /* number of streams to pre-open on a association */ 1922 m->pre_open_stream_count = sctp_nr_outgoing_streams_default; 1923 1924 /* Add adaptation cookie */ 1925 m->adaptation_layer_indicator = 0x504C5253; 1926 1927 /* seed random number generator */ 1928 m->random_counter = 1; 1929 m->store_at = SCTP_SIGNATURE_SIZE; 1930 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 1931 sctp_fill_random_store(m); 1932 1933 /* Minimum cookie size */ 1934 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 1935 sizeof(struct sctp_state_cookie); 1936 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 1937 1938 /* Setup the initial secret */ 1939 (void)SCTP_GETTIME_TIMEVAL(&time); 1940 m->time_of_secret_change = time.tv_sec; 1941 1942 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 1943 m->secret_key[0][i] = sctp_select_initial_TSN(m); 1944 } 1945 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 1946 1947 /* How long is a cookie good for ? */ 1948 m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default); 1949 /* 1950 * Initialize authentication parameters 1951 */ 1952 m->local_hmacs = sctp_default_supported_hmaclist(); 1953 m->local_auth_chunks = sctp_alloc_chunklist(); 1954 sctp_auth_set_default_chunks(m->local_auth_chunks); 1955 LIST_INIT(&m->shared_keys); 1956 /* add default NULL key as key id 0 */ 1957 null_key = sctp_alloc_sharedkey(); 1958 sctp_insert_sharedkey(&m->shared_keys, null_key); 1959 SCTP_INP_WUNLOCK(inp); 1960#ifdef SCTP_LOG_CLOSING 1961 sctp_log_closing(inp, NULL, 12); 1962#endif 1963 return (error); 1964} 1965 1966 1967void 1968sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 1969 struct sctp_tcb *stcb) 1970{ 1971 struct sctp_nets *net; 1972 uint16_t lport, rport; 1973 struct sctppcbhead *head; 1974 struct sctp_laddr *laddr, *oladdr; 1975 1976 SCTP_TCB_UNLOCK(stcb); 1977 SCTP_INP_INFO_WLOCK(); 1978 SCTP_INP_WLOCK(old_inp); 1979 SCTP_INP_WLOCK(new_inp); 1980 SCTP_TCB_LOCK(stcb); 1981 1982 new_inp->sctp_ep.time_of_secret_change = 1983 old_inp->sctp_ep.time_of_secret_change; 1984 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 1985 sizeof(old_inp->sctp_ep.secret_key)); 1986 new_inp->sctp_ep.current_secret_number = 1987 old_inp->sctp_ep.current_secret_number; 1988 new_inp->sctp_ep.last_secret_number = 1989 old_inp->sctp_ep.last_secret_number; 1990 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 1991 1992 /* make it so new data pours into the new socket */ 1993 stcb->sctp_socket = new_inp->sctp_socket; 1994 stcb->sctp_ep = new_inp; 1995 1996 /* Copy the port across */ 1997 lport = new_inp->sctp_lport = old_inp->sctp_lport; 1998 rport = stcb->rport; 1999 /* Pull the tcb from the old association */ 2000 LIST_REMOVE(stcb, sctp_tcbhash); 2001 LIST_REMOVE(stcb, sctp_tcblist); 2002 2003 /* Now insert the new_inp into the TCP connected hash */ 2004 head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport), 2005 sctppcbinfo.hashtcpmark)]; 2006 2007 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2008 /* Its safe to access */ 2009 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2010 2011 /* Now move the tcb into the endpoint list */ 2012 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2013 /* 2014 * Question, do we even need to worry about the ep-hash since we 2015 * only have one connection? Probably not :> so lets get rid of it 2016 * and not suck up any kernel memory in that. 2017 */ 2018 2019 /* Ok. Let's restart timer. */ 2020 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2021 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2022 stcb, net); 2023 } 2024 2025 SCTP_INP_INFO_WUNLOCK(); 2026 if (new_inp->sctp_tcbhash != NULL) { 2027 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2028 new_inp->sctp_tcbhash = NULL; 2029 } 2030 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2031 /* Subset bound, so copy in the laddr list from the old_inp */ 2032 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2033 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 2034 if (laddr == NULL) { 2035 /* 2036 * Gak, what can we do? This assoc is really 2037 * HOSED. We probably should send an abort 2038 * here. 2039 */ 2040 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2041 continue; 2042 } 2043 SCTP_INCR_LADDR_COUNT(); 2044 bzero(laddr, sizeof(*laddr)); 2045 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2046 laddr->ifa = oladdr->ifa; 2047 atomic_add_int(&laddr->ifa->refcount, 1); 2048 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2049 sctp_nxt_addr); 2050 new_inp->laddr_count++; 2051 } 2052 } 2053 /* 2054 * Now any running timers need to be adjusted since we really don't 2055 * care if they are running or not just blast in the new_inp into 2056 * all of them. 2057 */ 2058 2059 stcb->asoc.hb_timer.ep = (void *)new_inp; 2060 stcb->asoc.dack_timer.ep = (void *)new_inp; 2061 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2062 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2063 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2064 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2065 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2066 /* now what about the nets? */ 2067 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2068 net->pmtu_timer.ep = (void *)new_inp; 2069 net->rxt_timer.ep = (void *)new_inp; 2070 net->fr_timer.ep = (void *)new_inp; 2071 } 2072 SCTP_INP_WUNLOCK(new_inp); 2073 SCTP_INP_WUNLOCK(old_inp); 2074} 2075 2076static int 2077sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 2078{ 2079 struct sctppcbhead *head; 2080 struct sctp_inpcb *t_inp; 2081 int fnd; 2082 2083 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 2084 sctppcbinfo.hashmark)]; 2085 LIST_FOREACH(t_inp, head, sctp_hash) { 2086 if (t_inp->sctp_lport != lport) { 2087 continue; 2088 } 2089 /* is it in the VRF in question */ 2090 fnd = 0; 2091 if (t_inp->def_vrf_id == vrf_id) 2092 fnd = 1; 2093 if (!fnd) 2094 continue; 2095 2096 /* This one is in use. */ 2097 /* check the v6/v4 binding issue */ 2098 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2099 SCTP_IPV6_V6ONLY(t_inp)) { 2100 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2101 /* collision in V6 space */ 2102 return (1); 2103 } else { 2104 /* inp is BOUND_V4 no conflict */ 2105 continue; 2106 } 2107 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2108 /* t_inp is bound v4 and v6, conflict always */ 2109 return (1); 2110 } else { 2111 /* t_inp is bound only V4 */ 2112 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2113 SCTP_IPV6_V6ONLY(inp)) { 2114 /* no conflict */ 2115 continue; 2116 } 2117 /* else fall through to conflict */ 2118 } 2119 return (1); 2120 } 2121 return (0); 2122} 2123 2124 2125 2126/* sctp_ifap is used to bypass normal local address validation checks */ 2127int 2128sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2129 struct sctp_ifa *sctp_ifap, struct thread *p) 2130{ 2131 /* bind a ep to a socket address */ 2132 struct sctppcbhead *head; 2133 struct sctp_inpcb *inp, *inp_tmp; 2134 struct inpcb *ip_inp; 2135 int bindall; 2136 int prison = 0; 2137 uint16_t lport; 2138 int error; 2139 uint32_t vrf_id; 2140 2141 lport = 0; 2142 error = 0; 2143 bindall = 1; 2144 inp = (struct sctp_inpcb *)so->so_pcb; 2145 ip_inp = (struct inpcb *)so->so_pcb; 2146#ifdef SCTP_DEBUG 2147 if (addr) { 2148 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2149 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2150 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2151 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2152 } 2153#endif 2154 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2155 /* already did a bind, subsequent binds NOT allowed ! */ 2156 return (EINVAL); 2157 } 2158#ifdef INVARIANTS 2159 if (p == NULL) 2160 panic("null proc/thread"); 2161#endif 2162 if (p && jailed(p->td_ucred)) { 2163 prison = 1; 2164 } 2165 if (addr != NULL) { 2166 if (addr->sa_family == AF_INET) { 2167 struct sockaddr_in *sin; 2168 2169 /* IPV6_V6ONLY socket? */ 2170 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2171 return (EINVAL); 2172 } 2173 if (addr->sa_len != sizeof(*sin)) 2174 return (EINVAL); 2175 2176 sin = (struct sockaddr_in *)addr; 2177 lport = sin->sin_port; 2178 if (prison) { 2179 /* 2180 * For INADDR_ANY and LOOPBACK the 2181 * prison_ip() call will tranmute the ip 2182 * address to the proper valie. 2183 */ 2184 if (prison_ip(p->td_ucred, 0, &sin->sin_addr.s_addr)) 2185 return (EINVAL); 2186 } 2187 if (sin->sin_addr.s_addr != INADDR_ANY) { 2188 bindall = 0; 2189 } 2190 } else if (addr->sa_family == AF_INET6) { 2191 /* Only for pure IPv6 Address. (No IPv4 Mapped!) */ 2192 struct sockaddr_in6 *sin6; 2193 2194 sin6 = (struct sockaddr_in6 *)addr; 2195 2196 if (addr->sa_len != sizeof(*sin6)) 2197 return (EINVAL); 2198 2199 lport = sin6->sin6_port; 2200 /* 2201 * Jail checks for IPv6 should go HERE! i.e. add the 2202 * prison_ip() equivilant in this postion to 2203 * transmute the addresses to the proper one jailed. 2204 */ 2205 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2206 bindall = 0; 2207 /* KAME hack: embed scopeid */ 2208 if (sa6_embedscope(sin6, ip6_use_defzone) != 0) 2209 return (EINVAL); 2210 } 2211 /* this must be cleared for ifa_ifwithaddr() */ 2212 sin6->sin6_scope_id = 0; 2213 } else { 2214 return (EAFNOSUPPORT); 2215 } 2216 } 2217 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2218 vrf_id = inp->def_vrf_id; 2219 2220 SCTP_INP_INFO_WLOCK(); 2221 SCTP_INP_WLOCK(inp); 2222 /* increase our count due to the unlock we do */ 2223 SCTP_INP_INCR_REF(inp); 2224 if (lport) { 2225 /* 2226 * Did the caller specify a port? if so we must see if a ep 2227 * already has this one bound. 2228 */ 2229 /* got to be root to get at low ports */ 2230 if (ntohs(lport) < IPPORT_RESERVED) { 2231 if (p && (error = 2232 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2233 )) { 2234 SCTP_INP_DECR_REF(inp); 2235 SCTP_INP_WUNLOCK(inp); 2236 SCTP_INP_INFO_WUNLOCK(); 2237 return (error); 2238 } 2239 } 2240 if (p == NULL) { 2241 SCTP_INP_DECR_REF(inp); 2242 SCTP_INP_WUNLOCK(inp); 2243 SCTP_INP_INFO_WUNLOCK(); 2244 return (error); 2245 } 2246 SCTP_INP_WUNLOCK(inp); 2247 if (bindall) { 2248 vrf_id = inp->def_vrf_id; 2249 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2250 if (inp_tmp != NULL) { 2251 /* 2252 * lock guy returned and lower count note 2253 * that we are not bound so inp_tmp should 2254 * NEVER be inp. And it is this inp 2255 * (inp_tmp) that gets the reference bump, 2256 * so we must lower it. 2257 */ 2258 SCTP_INP_DECR_REF(inp_tmp); 2259 SCTP_INP_DECR_REF(inp); 2260 /* unlock info */ 2261 SCTP_INP_INFO_WUNLOCK(); 2262 return (EADDRINUSE); 2263 } 2264 } else { 2265 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2266 if (inp_tmp != NULL) { 2267 /* 2268 * lock guy returned and lower count note 2269 * that we are not bound so inp_tmp should 2270 * NEVER be inp. And it is this inp 2271 * (inp_tmp) that gets the reference bump, 2272 * so we must lower it. 2273 */ 2274 SCTP_INP_DECR_REF(inp_tmp); 2275 SCTP_INP_DECR_REF(inp); 2276 /* unlock info */ 2277 SCTP_INP_INFO_WUNLOCK(); 2278 return (EADDRINUSE); 2279 } 2280 } 2281 SCTP_INP_WLOCK(inp); 2282 if (bindall) { 2283 /* verify that no lport is not used by a singleton */ 2284 if (sctp_isport_inuse(inp, lport, vrf_id)) { 2285 /* Sorry someone already has this one bound */ 2286 SCTP_INP_DECR_REF(inp); 2287 SCTP_INP_WUNLOCK(inp); 2288 SCTP_INP_INFO_WUNLOCK(); 2289 return (EADDRINUSE); 2290 } 2291 } 2292 } else { 2293 uint16_t first, last, candidate; 2294 uint16_t count; 2295 int done; 2296 2297 if (ip_inp->inp_flags & INP_HIGHPORT) { 2298 first = ipport_hifirstauto; 2299 last = ipport_hilastauto; 2300 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2301 if (p && (error = 2302 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2303 )) { 2304 SCTP_INP_DECR_REF(inp); 2305 SCTP_INP_WUNLOCK(inp); 2306 SCTP_INP_INFO_WUNLOCK(); 2307 return (error); 2308 } 2309 first = ipport_lowfirstauto; 2310 last = ipport_lowlastauto; 2311 } else { 2312 first = ipport_firstauto; 2313 last = ipport_lastauto; 2314 } 2315 if (first > last) { 2316 uint16_t temp; 2317 2318 temp = first; 2319 first = last; 2320 last = temp; 2321 } 2322 count = last - first + 1; /* number of candidates */ 2323 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2324 2325 done = 0; 2326 while (!done) { 2327 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) { 2328 done = 1; 2329 } 2330 if (!done) { 2331 if (--count == 0) { 2332 SCTP_INP_DECR_REF(inp); 2333 SCTP_INP_WUNLOCK(inp); 2334 SCTP_INP_INFO_WUNLOCK(); 2335 return (EADDRINUSE); 2336 } 2337 if (candidate == last) 2338 candidate = first; 2339 else 2340 candidate = candidate + 1; 2341 } 2342 } 2343 lport = htons(candidate); 2344 } 2345 SCTP_INP_DECR_REF(inp); 2346 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2347 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2348 /* 2349 * this really should not happen. The guy did a non-blocking 2350 * bind and then did a close at the same time. 2351 */ 2352 SCTP_INP_WUNLOCK(inp); 2353 SCTP_INP_INFO_WUNLOCK(); 2354 return (EINVAL); 2355 } 2356 /* ok we look clear to give out this port, so lets setup the binding */ 2357 if (bindall) { 2358 /* binding to all addresses, so just set in the proper flags */ 2359 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2360 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2361 /* set the automatic addr changes from kernel flag */ 2362 if (sctp_auto_asconf == 0) { 2363 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2364 } else { 2365 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2366 } 2367 } else { 2368 /* 2369 * bind specific, make sure flags is off and add a new 2370 * address structure to the sctp_addr_list inside the ep 2371 * structure. 2372 * 2373 * We will need to allocate one and insert it at the head. The 2374 * socketopt call can just insert new addresses in there as 2375 * well. It will also have to do the embed scope kame hack 2376 * too (before adding). 2377 */ 2378 struct sctp_ifa *ifa; 2379 struct sockaddr_storage store_sa; 2380 2381 memset(&store_sa, 0, sizeof(store_sa)); 2382 if (addr->sa_family == AF_INET) { 2383 struct sockaddr_in *sin; 2384 2385 sin = (struct sockaddr_in *)&store_sa; 2386 memcpy(sin, addr, sizeof(struct sockaddr_in)); 2387 sin->sin_port = 0; 2388 } else if (addr->sa_family == AF_INET6) { 2389 struct sockaddr_in6 *sin6; 2390 2391 sin6 = (struct sockaddr_in6 *)&store_sa; 2392 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 2393 sin6->sin6_port = 0; 2394 } 2395 /* 2396 * first find the interface with the bound address need to 2397 * zero out the port to find the address! yuck! can't do 2398 * this earlier since need port for sctp_pcb_findep() 2399 */ 2400 if (sctp_ifap != NULL) 2401 ifa = sctp_ifap; 2402 else { 2403 /* 2404 * Note for BSD we hit here always other O/S's will 2405 * pass things in via the sctp_ifap argument 2406 * (Panda). 2407 */ 2408 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 2409 vrf_id, 0); 2410 } 2411 if (ifa == NULL) { 2412 /* Can't find an interface with that address */ 2413 SCTP_INP_WUNLOCK(inp); 2414 SCTP_INP_INFO_WUNLOCK(); 2415 return (EADDRNOTAVAIL); 2416 } 2417 if (addr->sa_family == AF_INET6) { 2418 /* GAK, more FIXME IFA lock? */ 2419 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2420 /* Can't bind a non-existent addr. */ 2421 SCTP_INP_WUNLOCK(inp); 2422 SCTP_INP_INFO_WUNLOCK(); 2423 return (EINVAL); 2424 } 2425 } 2426 /* we're not bound all */ 2427 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 2428 /* allow bindx() to send ASCONF's for binding changes */ 2429 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2430 /* clear automatic addr changes from kernel flag */ 2431 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2432 2433 /* add this address to the endpoint list */ 2434 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 2435 if (error != 0) { 2436 SCTP_INP_WUNLOCK(inp); 2437 SCTP_INP_INFO_WUNLOCK(); 2438 return (error); 2439 } 2440 inp->laddr_count++; 2441 } 2442 /* find the bucket */ 2443 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 2444 sctppcbinfo.hashmark)]; 2445 /* put it in the bucket */ 2446 LIST_INSERT_HEAD(head, inp, sctp_hash); 2447 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n", 2448 head, ntohs(lport)); 2449 /* set in the port */ 2450 inp->sctp_lport = lport; 2451 2452 /* turn off just the unbound flag */ 2453 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2454 SCTP_INP_WUNLOCK(inp); 2455 SCTP_INP_INFO_WUNLOCK(); 2456 return (0); 2457} 2458 2459 2460static void 2461sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next) 2462{ 2463 struct sctp_iterator *it; 2464 2465 /* 2466 * We enter with the only the ITERATOR_LOCK in place and a write 2467 * lock on the inp_info stuff. 2468 */ 2469 2470 /* 2471 * Go through all iterators, we must do this since it is possible 2472 * that some iterator does NOT have the lock, but is waiting for it. 2473 * And the one that had the lock has either moved in the last 2474 * iteration or we just cleared it above. We need to find all of 2475 * those guys. The list of iterators should never be very big 2476 * though. 2477 */ 2478 TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) { 2479 if (it == inp->inp_starting_point_for_iterator) 2480 /* skip this guy, he's special */ 2481 continue; 2482 if (it->inp == inp) { 2483 /* 2484 * This is tricky and we DON'T lock the iterator. 2485 * Reason is he's running but waiting for me since 2486 * inp->inp_starting_point_for_iterator has the lock 2487 * on me (the guy above we skipped). This tells us 2488 * its is not running but waiting for 2489 * inp->inp_starting_point_for_iterator to be 2490 * released by the guy that does have our INP in a 2491 * lock. 2492 */ 2493 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 2494 it->inp = NULL; 2495 it->stcb = NULL; 2496 } else { 2497 /* set him up to do the next guy not me */ 2498 it->inp = inp_next; 2499 it->stcb = NULL; 2500 } 2501 } 2502 } 2503 it = inp->inp_starting_point_for_iterator; 2504 if (it) { 2505 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 2506 it->inp = NULL; 2507 } else { 2508 it->inp = inp_next; 2509 } 2510 it->stcb = NULL; 2511 } 2512} 2513 2514/* release sctp_inpcb unbind the port */ 2515void 2516sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 2517{ 2518 /* 2519 * Here we free a endpoint. We must find it (if it is in the Hash 2520 * table) and remove it from there. Then we must also find it in the 2521 * overall list and remove it from there. After all removals are 2522 * complete then any timer has to be stopped. Then start the actual 2523 * freeing. a) Any local lists. b) Any associations. c) The hash of 2524 * all associations. d) finally the ep itself. 2525 */ 2526 struct sctp_pcb *m; 2527 struct sctp_inpcb *inp_save; 2528 struct sctp_tcb *asoc, *nasoc; 2529 struct sctp_laddr *laddr, *nladdr; 2530 struct inpcb *ip_pcb; 2531 struct socket *so; 2532 2533 struct sctp_queued_to_read *sq; 2534 2535 2536 int cnt; 2537 sctp_sharedkey_t *shared_key; 2538 2539 2540#ifdef SCTP_LOG_CLOSING 2541 sctp_log_closing(inp, NULL, 0); 2542#endif 2543 2544 SCTP_ITERATOR_LOCK(); 2545 so = inp->sctp_socket; 2546 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2547 /* been here before.. eeks.. get out of here */ 2548 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 2549 SCTP_ITERATOR_UNLOCK(); 2550#ifdef SCTP_LOG_CLOSING 2551 sctp_log_closing(inp, NULL, 1); 2552#endif 2553 return; 2554 } 2555 SCTP_ASOC_CREATE_LOCK(inp); 2556 SCTP_INP_INFO_WLOCK(); 2557 2558 SCTP_INP_WLOCK(inp); 2559 /* First time through we have the socket lock, after that no more. */ 2560 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 2561 /* 2562 * Once we are in we can remove the flag from = 1 is only 2563 * passed from the actual closing routines that are called 2564 * via the sockets layer. 2565 */ 2566 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 2567 } 2568 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 2569 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 2570 2571 if (inp->control) { 2572 sctp_m_freem(inp->control); 2573 inp->control = NULL; 2574 } 2575 if (inp->pkt) { 2576 sctp_m_freem(inp->pkt); 2577 inp->pkt = NULL; 2578 } 2579 m = &inp->sctp_ep; 2580 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 2581 * here but I will be nice :> (i.e. 2582 * ip_pcb = ep;) */ 2583 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 2584 int cnt_in_sd; 2585 2586 cnt_in_sd = 0; 2587 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 2588 asoc = nasoc) { 2589 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2590 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2591 /* Skip guys being freed */ 2592 asoc->sctp_socket = NULL; 2593 cnt_in_sd++; 2594 continue; 2595 } 2596 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 2597 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 2598 /* 2599 * If we have data in queue, we don't want 2600 * to just free since the app may have done, 2601 * send()/close or connect/send/close. And 2602 * it wants the data to get across first. 2603 */ 2604 if (asoc->asoc.total_output_queue_size == 0) { 2605 /* 2606 * Just abandon things in the front 2607 * states 2608 */ 2609 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2); 2610 continue; 2611 } 2612 } 2613 SCTP_TCB_LOCK(asoc); 2614 /* Disconnect the socket please */ 2615 asoc->sctp_socket = NULL; 2616 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 2617 if ((asoc->asoc.size_on_reasm_queue > 0) || 2618 (asoc->asoc.control_pdapi) || 2619 (asoc->asoc.size_on_all_streams > 0) || 2620 (so && (so->so_rcv.sb_cc > 0)) 2621 ) { 2622 /* Left with Data unread */ 2623 struct mbuf *op_err; 2624 2625 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2626 0, M_DONTWAIT, 1, MT_DATA); 2627 if (op_err) { 2628 /* Fill in the user initiated abort */ 2629 struct sctp_paramhdr *ph; 2630 uint32_t *ippp; 2631 2632 SCTP_BUF_LEN(op_err) = 2633 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 2634 ph = mtod(op_err, 2635 struct sctp_paramhdr *); 2636 ph->param_type = htons( 2637 SCTP_CAUSE_USER_INITIATED_ABT); 2638 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2639 ippp = (uint32_t *) (ph + 1); 2640 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 2641 } 2642 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 2643 sctp_send_abort_tcb(asoc, op_err); 2644 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2645 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2646 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2647 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2648 } 2649 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4); 2650 continue; 2651 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 2652 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 2653 (asoc->asoc.stream_queue_cnt == 0) 2654 ) { 2655 if (asoc->asoc.locked_on_sending) { 2656 goto abort_anyway; 2657 } 2658 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 2659 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 2660 /* 2661 * there is nothing queued to send, 2662 * so I send shutdown 2663 */ 2664 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 2665 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2666 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2667 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2668 } 2669 asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT; 2670 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 2671 asoc->asoc.primary_destination); 2672 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 2673 asoc->asoc.primary_destination); 2674 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR); 2675 } 2676 } else { 2677 /* mark into shutdown pending */ 2678 struct sctp_stream_queue_pending *sp; 2679 2680 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 2681 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 2682 asoc->asoc.primary_destination); 2683 if (asoc->asoc.locked_on_sending) { 2684 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 2685 sctp_streamhead); 2686 if (sp == NULL) { 2687 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 2688 asoc->asoc.locked_on_sending, 2689 asoc->asoc.locked_on_sending->stream_no); 2690 } else { 2691 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 2692 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 2693 } 2694 } 2695 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 2696 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 2697 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 2698 struct mbuf *op_err; 2699 2700 abort_anyway: 2701 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2702 0, M_DONTWAIT, 1, MT_DATA); 2703 if (op_err) { 2704 /* 2705 * Fill in the user 2706 * initiated abort 2707 */ 2708 struct sctp_paramhdr *ph; 2709 uint32_t *ippp; 2710 2711 SCTP_BUF_LEN(op_err) = 2712 (sizeof(struct sctp_paramhdr) + 2713 sizeof(uint32_t)); 2714 ph = mtod(op_err, 2715 struct sctp_paramhdr *); 2716 ph->param_type = htons( 2717 SCTP_CAUSE_USER_INITIATED_ABT); 2718 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2719 ippp = (uint32_t *) (ph + 1); 2720 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 2721 } 2722 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 2723 sctp_send_abort_tcb(asoc, op_err); 2724 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2725 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2726 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2727 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2728 } 2729 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6); 2730 continue; 2731 } 2732 } 2733 cnt_in_sd++; 2734 SCTP_TCB_UNLOCK(asoc); 2735 } 2736 /* now is there some left in our SHUTDOWN state? */ 2737 if (cnt_in_sd) { 2738 SCTP_INP_WUNLOCK(inp); 2739 SCTP_ASOC_CREATE_UNLOCK(inp); 2740 SCTP_INP_INFO_WUNLOCK(); 2741 SCTP_ITERATOR_UNLOCK(); 2742#ifdef SCTP_LOG_CLOSING 2743 sctp_log_closing(inp, NULL, 2); 2744#endif 2745 return; 2746 } 2747 } 2748 inp->sctp_socket = NULL; 2749 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 2750 SCTP_PCB_FLAGS_UNBOUND) { 2751 /* 2752 * ok, this guy has been bound. It's port is somewhere in 2753 * the sctppcbinfo hash table. Remove it! 2754 */ 2755 LIST_REMOVE(inp, sctp_hash); 2756 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 2757 } 2758 /* 2759 * If there is a timer running to kill us, forget it, since it may 2760 * have a contest on the INP lock.. which would cause us to die ... 2761 */ 2762 cnt = 0; 2763 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 2764 asoc = nasoc) { 2765 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2766 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2767 cnt++; 2768 continue; 2769 } 2770 /* Free associations that are NOT killing us */ 2771 SCTP_TCB_LOCK(asoc); 2772 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 2773 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 2774 struct mbuf *op_err; 2775 uint32_t *ippp; 2776 2777 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2778 0, M_DONTWAIT, 1, MT_DATA); 2779 if (op_err) { 2780 /* Fill in the user initiated abort */ 2781 struct sctp_paramhdr *ph; 2782 2783 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 2784 sizeof(uint32_t)); 2785 ph = mtod(op_err, struct sctp_paramhdr *); 2786 ph->param_type = htons( 2787 SCTP_CAUSE_USER_INITIATED_ABT); 2788 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2789 ippp = (uint32_t *) (ph + 1); 2790 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 2791 2792 } 2793 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 2794 sctp_send_abort_tcb(asoc, op_err); 2795 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2796 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2797 cnt++; 2798 SCTP_TCB_UNLOCK(asoc); 2799 continue; 2800 } 2801 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2802 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2803 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2804 } 2805 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8); 2806 } 2807 if (cnt) { 2808 /* Ok we have someone out there that will kill us */ 2809 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2810 SCTP_INP_WUNLOCK(inp); 2811 SCTP_ASOC_CREATE_UNLOCK(inp); 2812 SCTP_INP_INFO_WUNLOCK(); 2813 SCTP_ITERATOR_UNLOCK(); 2814#ifdef SCTP_LOG_CLOSING 2815 sctp_log_closing(inp, NULL, 3); 2816#endif 2817 return; 2818 } 2819 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 2820 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2821 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 2822 SCTP_INP_WUNLOCK(inp); 2823 SCTP_ASOC_CREATE_UNLOCK(inp); 2824 SCTP_INP_INFO_WUNLOCK(); 2825 SCTP_ITERATOR_UNLOCK(); 2826#ifdef SCTP_LOG_CLOSING 2827 sctp_log_closing(inp, NULL, 4); 2828#endif 2829 return; 2830 } 2831 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2832 inp->sctp_ep.signature_change.type = 0; 2833 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 2834 2835#ifdef SCTP_LOG_CLOSING 2836 sctp_log_closing(inp, NULL, 5); 2837#endif 2838 2839 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2840 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE; 2841 /* Clear the read queue */ 2842 /* sa_ignore FREED_MEMORY */ 2843 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { 2844 /* Its only abandoned if it had data left */ 2845 if (sq->length) 2846 SCTP_STAT_INCR(sctps_left_abandon); 2847 2848 TAILQ_REMOVE(&inp->read_queue, sq, next); 2849 sctp_free_remote_addr(sq->whoFrom); 2850 if (so) 2851 so->so_rcv.sb_cc -= sq->length; 2852 if (sq->data) { 2853 sctp_m_freem(sq->data); 2854 sq->data = NULL; 2855 } 2856 /* 2857 * no need to free the net count, since at this point all 2858 * assoc's are gone. 2859 */ 2860 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); 2861 SCTP_DECR_READQ_COUNT(); 2862 } 2863 /* Now the sctp_pcb things */ 2864 /* 2865 * free each asoc if it is not already closed/free. we can't use the 2866 * macro here since le_next will get freed as part of the 2867 * sctp_free_assoc() call. 2868 */ 2869 cnt = 0; 2870 if (so) { 2871#ifdef IPSEC 2872 ipsec4_delete_pcbpolicy(ip_pcb); 2873#endif /* IPSEC */ 2874 2875 /* Unlocks not needed since the socket is gone now */ 2876 } 2877 if (ip_pcb->inp_options) { 2878 (void)sctp_m_free(ip_pcb->inp_options); 2879 ip_pcb->inp_options = 0; 2880 } 2881 if (ip_pcb->inp_moptions) { 2882 inp_freemoptions(ip_pcb->inp_moptions); 2883 ip_pcb->inp_moptions = 0; 2884 } 2885#ifdef INET6 2886 if (ip_pcb->inp_vflag & INP_IPV6) { 2887 struct in6pcb *in6p; 2888 2889 in6p = (struct in6pcb *)inp; 2890 ip6_freepcbopts(in6p->in6p_outputopts); 2891 } 2892#endif /* INET6 */ 2893 ip_pcb->inp_vflag = 0; 2894 /* free up authentication fields */ 2895 if (inp->sctp_ep.local_auth_chunks != NULL) 2896 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 2897 if (inp->sctp_ep.local_hmacs != NULL) 2898 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 2899 2900 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 2901 while (shared_key) { 2902 LIST_REMOVE(shared_key, next); 2903 sctp_free_sharedkey(shared_key); 2904 /* sa_ignore FREED_MEMORY */ 2905 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 2906 } 2907 2908 inp_save = LIST_NEXT(inp, sctp_list); 2909 LIST_REMOVE(inp, sctp_list); 2910 2911 /* fix any iterators only after out of the list */ 2912 sctp_iterator_inp_being_freed(inp, inp_save); 2913 /* 2914 * if we have an address list the following will free the list of 2915 * ifaddr's that are set into this ep. Again macro limitations here, 2916 * since the LIST_FOREACH could be a bad idea. 2917 */ 2918 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; 2919 laddr = nladdr) { 2920 nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 2921 sctp_remove_laddr(laddr); 2922 } 2923 2924#ifdef SCTP_TRACK_FREED_ASOCS 2925 /* TEMP CODE */ 2926 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; 2927 asoc = nasoc) { 2928 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2929 LIST_REMOVE(asoc, sctp_tcblist); 2930 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc); 2931 SCTP_DECR_ASOC_COUNT(); 2932 } 2933 /* *** END TEMP CODE *** */ 2934#endif 2935 /* Now lets see about freeing the EP hash table. */ 2936 if (inp->sctp_tcbhash != NULL) { 2937 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 2938 inp->sctp_tcbhash = NULL; 2939 } 2940 /* Now we must put the ep memory back into the zone pool */ 2941 INP_LOCK_DESTROY(&inp->ip_inp.inp); 2942 SCTP_INP_LOCK_DESTROY(inp); 2943 SCTP_INP_READ_DESTROY(inp); 2944 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 2945 SCTP_INP_INFO_WUNLOCK(); 2946 2947 SCTP_ITERATOR_UNLOCK(); 2948 2949 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 2950 SCTP_DECR_EP_COUNT(); 2951 2952} 2953 2954 2955struct sctp_nets * 2956sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 2957{ 2958 struct sctp_nets *net; 2959 2960 /* locate the address */ 2961 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2962 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 2963 return (net); 2964 } 2965 return (NULL); 2966} 2967 2968 2969int 2970sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 2971{ 2972 struct sctp_ifa *sctp_ifa; 2973 2974 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0); 2975 if (sctp_ifa) { 2976 return (1); 2977 } else { 2978 return (0); 2979 } 2980} 2981 2982/* 2983 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 2984 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 2985 * stats of stuff. 2986 */ 2987int 2988sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 2989 int set_scope, int from) 2990{ 2991 /* 2992 * The following is redundant to the same lines in the 2993 * sctp_aloc_assoc() but is needed since other's call the add 2994 * address function 2995 */ 2996 struct sctp_nets *net, *netfirst; 2997 int addr_inscope; 2998 2999 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3000 from); 3001 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3002 3003 netfirst = sctp_findnet(stcb, newaddr); 3004 if (netfirst) { 3005 /* 3006 * Lie and return ok, we don't want to make the association 3007 * go away for this behavior. It will happen in the TCP 3008 * model in a connected socket. It does not reach the hash 3009 * table until after the association is built so it can't be 3010 * found. Mark as reachable, since the initial creation will 3011 * have been cleared and the NOT_IN_ASSOC flag will have 3012 * been added... and we don't want to end up removing it 3013 * back out. 3014 */ 3015 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3016 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3017 SCTP_ADDR_UNCONFIRMED); 3018 } else { 3019 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3020 } 3021 3022 return (0); 3023 } 3024 addr_inscope = 1; 3025 if (newaddr->sa_family == AF_INET) { 3026 struct sockaddr_in *sin; 3027 3028 sin = (struct sockaddr_in *)newaddr; 3029 if (sin->sin_addr.s_addr == 0) { 3030 /* Invalid address */ 3031 return (-1); 3032 } 3033 /* zero out the bzero area */ 3034 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3035 3036 /* assure len is set */ 3037 sin->sin_len = sizeof(struct sockaddr_in); 3038 if (set_scope) { 3039#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3040 stcb->ipv4_local_scope = 1; 3041#else 3042 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3043 stcb->asoc.ipv4_local_scope = 1; 3044 } 3045#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3046 } else { 3047 /* Validate the address is in scope */ 3048 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3049 (stcb->asoc.ipv4_local_scope == 0)) { 3050 addr_inscope = 0; 3051 } 3052 } 3053 } else if (newaddr->sa_family == AF_INET6) { 3054 struct sockaddr_in6 *sin6; 3055 3056 sin6 = (struct sockaddr_in6 *)newaddr; 3057 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3058 /* Invalid address */ 3059 return (-1); 3060 } 3061 /* assure len is set */ 3062 sin6->sin6_len = sizeof(struct sockaddr_in6); 3063 if (set_scope) { 3064 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3065 stcb->asoc.loopback_scope = 1; 3066 stcb->asoc.local_scope = 0; 3067 stcb->asoc.ipv4_local_scope = 1; 3068 stcb->asoc.site_scope = 1; 3069 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3070 /* 3071 * If the new destination is a LINK_LOCAL we 3072 * must have common site scope. Don't set 3073 * the local scope since we may not share 3074 * all links, only loopback can do this. 3075 * Links on the local network would also be 3076 * on our private network for v4 too. 3077 */ 3078 stcb->asoc.ipv4_local_scope = 1; 3079 stcb->asoc.site_scope = 1; 3080 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3081 /* 3082 * If the new destination is SITE_LOCAL then 3083 * we must have site scope in common. 3084 */ 3085 stcb->asoc.site_scope = 1; 3086 } 3087 } else { 3088 /* Validate the address is in scope */ 3089 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3090 (stcb->asoc.loopback_scope == 0)) { 3091 addr_inscope = 0; 3092 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3093 (stcb->asoc.local_scope == 0)) { 3094 addr_inscope = 0; 3095 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3096 (stcb->asoc.site_scope == 0)) { 3097 addr_inscope = 0; 3098 } 3099 } 3100 } else { 3101 /* not supported family type */ 3102 return (-1); 3103 } 3104 net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets); 3105 if (net == NULL) { 3106 return (-1); 3107 } 3108 SCTP_INCR_RADDR_COUNT(); 3109 bzero(net, sizeof(*net)); 3110 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3111 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3112 if (newaddr->sa_family == AF_INET) { 3113 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3114 } else if (newaddr->sa_family == AF_INET6) { 3115 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3116 } 3117 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3118 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3119 stcb->asoc.loopback_scope = 1; 3120 stcb->asoc.ipv4_local_scope = 1; 3121 stcb->asoc.local_scope = 0; 3122 stcb->asoc.site_scope = 1; 3123 addr_inscope = 1; 3124 } 3125 net->failure_threshold = stcb->asoc.def_net_failure; 3126 if (addr_inscope == 0) { 3127 net->dest_state = (SCTP_ADDR_REACHABLE | 3128 SCTP_ADDR_OUT_OF_SCOPE); 3129 } else { 3130 if (from == SCTP_ADDR_IS_CONFIRMED) 3131 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3132 net->dest_state = SCTP_ADDR_REACHABLE; 3133 else 3134 net->dest_state = SCTP_ADDR_REACHABLE | 3135 SCTP_ADDR_UNCONFIRMED; 3136 } 3137 /* 3138 * We set this to 0, the timer code knows that this means its an 3139 * initial value 3140 */ 3141 net->RTO = 0; 3142 net->RTO_measured = 0; 3143 stcb->asoc.numnets++; 3144 *(&net->ref_count) = 1; 3145 net->tos_flowlabel = 0; 3146#ifdef INET 3147 if (newaddr->sa_family == AF_INET) 3148 net->tos_flowlabel = stcb->asoc.default_tos; 3149#endif 3150#ifdef INET6 3151 if (newaddr->sa_family == AF_INET6) 3152 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3153#endif 3154 /* Init the timer structure */ 3155 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3156 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3157 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3158 3159 /* Now generate a route for this guy */ 3160 /* KAME hack: embed scopeid */ 3161 if (newaddr->sa_family == AF_INET6) { 3162 struct sockaddr_in6 *sin6; 3163 3164 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3165 (void)sa6_embedscope(sin6, ip6_use_defzone); 3166 sin6->sin6_scope_id = 0; 3167 } 3168 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3169 3170 if (newaddr->sa_family == AF_INET6) { 3171 struct sockaddr_in6 *sin6; 3172 3173 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3174 (void)sa6_recoverscope(sin6); 3175 } 3176 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3177 /* Get source address */ 3178 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3179 stcb, 3180 (sctp_route_t *) & net->ro, 3181 net, 3182 0, 3183 stcb->asoc.vrf_id); 3184 /* Now get the interface MTU */ 3185 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3186 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3187 } else { 3188 net->mtu = 0; 3189 } 3190#ifdef SCTP_PRINT_FOR_B_AND_M 3191 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu); 3192#endif 3193 if (net->mtu == 0) { 3194 /* Huh ?? */ 3195 net->mtu = SCTP_DEFAULT_MTU; 3196 } else { 3197 uint32_t rmtu; 3198 3199 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3200#ifdef SCTP_PRINT_FOR_B_AND_M 3201 SCTP_PRINTF("The route mtu is %d\n", rmtu); 3202#endif 3203 if (rmtu == 0) { 3204 /* 3205 * Start things off to match mtu of 3206 * interface please. 3207 */ 3208 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3209 net->ro.ro_rt, net->mtu); 3210 } else { 3211 /* 3212 * we take the route mtu over the interface, 3213 * since the route may be leading out the 3214 * loopback, or a different interface. 3215 */ 3216 net->mtu = rmtu; 3217 } 3218 } 3219 if (from == SCTP_ALLOC_ASOC) { 3220#ifdef SCTP_PRINT_FOR_B_AND_M 3221 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu); 3222#endif 3223 stcb->asoc.smallest_mtu = net->mtu; 3224 } 3225 } else { 3226 net->mtu = stcb->asoc.smallest_mtu; 3227 } 3228 if (stcb->asoc.smallest_mtu > net->mtu) { 3229#ifdef SCTP_PRINT_FOR_B_AND_M 3230 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n", 3231 net->mtu, stcb->asoc.smallest_mtu); 3232#endif 3233 stcb->asoc.smallest_mtu = net->mtu; 3234 } 3235 /* JRS - Use the congestion control given in the CC module */ 3236 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 3237 3238 /* 3239 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3240 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3241 */ 3242 net->find_pseudo_cumack = 1; 3243 net->find_rtx_pseudo_cumack = 1; 3244 net->src_addr_selected = 0; 3245 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3246 if (net->ro.ro_rt == NULL) { 3247 /* Since we have no route put it at the back */ 3248 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3249 } else if (netfirst == NULL) { 3250 /* We are the first one in the pool. */ 3251 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3252 } else if (netfirst->ro.ro_rt == NULL) { 3253 /* 3254 * First one has NO route. Place this one ahead of the first 3255 * one. 3256 */ 3257 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3258 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3259 /* 3260 * This one has a different interface than the one at the 3261 * top of the list. Place it ahead. 3262 */ 3263 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3264 } else { 3265 /* 3266 * Ok we have the same interface as the first one. Move 3267 * forward until we find either a) one with a NULL route... 3268 * insert ahead of that b) one with a different ifp.. insert 3269 * after that. c) end of the list.. insert at the tail. 3270 */ 3271 struct sctp_nets *netlook; 3272 3273 do { 3274 netlook = TAILQ_NEXT(netfirst, sctp_next); 3275 if (netlook == NULL) { 3276 /* End of the list */ 3277 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3278 break; 3279 } else if (netlook->ro.ro_rt == NULL) { 3280 /* next one has NO route */ 3281 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 3282 break; 3283 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 3284 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 3285 net, sctp_next); 3286 break; 3287 } 3288 /* Shift forward */ 3289 netfirst = netlook; 3290 } while (netlook != NULL); 3291 } 3292 3293 /* got to have a primary set */ 3294 if (stcb->asoc.primary_destination == 0) { 3295 stcb->asoc.primary_destination = net; 3296 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 3297 (net->ro.ro_rt) && 3298 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 3299 /* No route to current primary adopt new primary */ 3300 stcb->asoc.primary_destination = net; 3301 } 3302 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 3303 net); 3304 /* Validate primary is first */ 3305 net = TAILQ_FIRST(&stcb->asoc.nets); 3306 if ((net != stcb->asoc.primary_destination) && 3307 (stcb->asoc.primary_destination)) { 3308 /* 3309 * first one on the list is NOT the primary sctp_cmpaddr() 3310 * is much more efficent if the primary is the first on the 3311 * list, make it so. 3312 */ 3313 TAILQ_REMOVE(&stcb->asoc.nets, 3314 stcb->asoc.primary_destination, sctp_next); 3315 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 3316 stcb->asoc.primary_destination, sctp_next); 3317 } 3318 return (0); 3319} 3320 3321 3322/* 3323 * allocate an association and add it to the endpoint. The caller must be 3324 * careful to add all additional addresses once they are know right away or 3325 * else the assoc will be may experience a blackout scenario. 3326 */ 3327struct sctp_tcb * 3328sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 3329 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id, 3330 struct thread *p 3331) 3332{ 3333 /* note the p argument is only valid in unbound sockets */ 3334 3335 struct sctp_tcb *stcb; 3336 struct sctp_association *asoc; 3337 struct sctpasochead *head; 3338 uint16_t rport; 3339 int err; 3340 3341 /* 3342 * Assumption made here: Caller has done a 3343 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 3344 * address does not exist already. 3345 */ 3346 if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) { 3347 /* Hit max assoc, sorry no more */ 3348 *error = ENOBUFS; 3349 return (NULL); 3350 } 3351 if (firstaddr == NULL) { 3352 *error = EINVAL; 3353 return (NULL); 3354 } 3355 SCTP_INP_RLOCK(inp); 3356 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 3357 /* 3358 * If its in the TCP pool, its NOT allowed to create an 3359 * association. The parent listener needs to call 3360 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 3361 * off, or connected one does this.. its an error. 3362 */ 3363 SCTP_INP_RUNLOCK(inp); 3364 *error = EINVAL; 3365 return (NULL); 3366 } 3367 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 3368#ifdef SCTP_DEBUG 3369 if (firstaddr) { 3370 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 3371 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 3372 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 3373 } else { 3374 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 3375 } 3376#endif /* SCTP_DEBUG */ 3377 if (firstaddr->sa_family == AF_INET) { 3378 struct sockaddr_in *sin; 3379 3380 sin = (struct sockaddr_in *)firstaddr; 3381 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 3382 /* Invalid address */ 3383 SCTP_INP_RUNLOCK(inp); 3384 *error = EINVAL; 3385 return (NULL); 3386 } 3387 rport = sin->sin_port; 3388 } else if (firstaddr->sa_family == AF_INET6) { 3389 struct sockaddr_in6 *sin6; 3390 3391 sin6 = (struct sockaddr_in6 *)firstaddr; 3392 if ((sin6->sin6_port == 0) || 3393 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 3394 /* Invalid address */ 3395 SCTP_INP_RUNLOCK(inp); 3396 *error = EINVAL; 3397 return (NULL); 3398 } 3399 rport = sin6->sin6_port; 3400 } else { 3401 /* not supported family type */ 3402 SCTP_INP_RUNLOCK(inp); 3403 *error = EINVAL; 3404 return (NULL); 3405 } 3406 SCTP_INP_RUNLOCK(inp); 3407 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 3408 /* 3409 * If you have not performed a bind, then we need to do the 3410 * ephemerial bind for you. 3411 */ 3412 if ((err = sctp_inpcb_bind(inp->sctp_socket, 3413 (struct sockaddr *)NULL, 3414 (struct sctp_ifa *)NULL, 3415 p 3416 ))) { 3417 /* bind error, probably perm */ 3418 *error = err; 3419 return (NULL); 3420 } 3421 } 3422 stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb); 3423 if (stcb == NULL) { 3424 /* out of memory? */ 3425 *error = ENOMEM; 3426 return (NULL); 3427 } 3428 SCTP_INCR_ASOC_COUNT(); 3429 3430 bzero(stcb, sizeof(*stcb)); 3431 asoc = &stcb->asoc; 3432 SCTP_TCB_LOCK_INIT(stcb); 3433 SCTP_TCB_SEND_LOCK_INIT(stcb); 3434 /* setup back pointer's */ 3435 stcb->sctp_ep = inp; 3436 stcb->sctp_socket = inp->sctp_socket; 3437 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) { 3438 /* failed */ 3439 SCTP_TCB_LOCK_DESTROY(stcb); 3440 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3441 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3442 SCTP_DECR_ASOC_COUNT(); 3443 *error = err; 3444 return (NULL); 3445 } 3446 /* and the port */ 3447 stcb->rport = rport; 3448 SCTP_INP_INFO_WLOCK(); 3449 SCTP_INP_WLOCK(inp); 3450 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3451 /* inpcb freed while alloc going on */ 3452 SCTP_TCB_LOCK_DESTROY(stcb); 3453 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3454 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3455 SCTP_INP_WUNLOCK(inp); 3456 SCTP_INP_INFO_WUNLOCK(); 3457 SCTP_DECR_ASOC_COUNT(); 3458 *error = EINVAL; 3459 return (NULL); 3460 } 3461 SCTP_TCB_LOCK(stcb); 3462 3463 /* now that my_vtag is set, add it to the hash */ 3464 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, 3465 sctppcbinfo.hashasocmark)]; 3466 /* put it in the bucket in the vtag hash of assoc's for the system */ 3467 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 3468 SCTP_INP_INFO_WUNLOCK(); 3469 3470 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 3471 /* failure.. memory error? */ 3472 if (asoc->strmout) { 3473 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 3474 asoc->strmout = NULL; 3475 } 3476 if (asoc->mapping_array) { 3477 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 3478 asoc->mapping_array = NULL; 3479 } 3480 SCTP_DECR_ASOC_COUNT(); 3481 SCTP_TCB_LOCK_DESTROY(stcb); 3482 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3483 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3484 SCTP_INP_WUNLOCK(inp); 3485 *error = ENOBUFS; 3486 return (NULL); 3487 } 3488 /* Init all the timers */ 3489 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 3490 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 3491 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 3492 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 3493 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 3494 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 3495 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 3496 3497 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 3498 /* now file the port under the hash as well */ 3499 if (inp->sctp_tcbhash != NULL) { 3500 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 3501 inp->sctp_hashmark)]; 3502 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 3503 } 3504 SCTP_INP_WUNLOCK(inp); 3505 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 3506 return (stcb); 3507} 3508 3509 3510void 3511sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 3512{ 3513 struct sctp_association *asoc; 3514 3515 asoc = &stcb->asoc; 3516 asoc->numnets--; 3517 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 3518 if (net == asoc->primary_destination) { 3519 /* Reset primary */ 3520 struct sctp_nets *lnet; 3521 3522 lnet = TAILQ_FIRST(&asoc->nets); 3523 /* Try to find a confirmed primary */ 3524 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 3525 } 3526 if (net == asoc->last_data_chunk_from) { 3527 /* Reset primary */ 3528 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 3529 } 3530 if (net == asoc->last_control_chunk_from) { 3531 /* Clear net */ 3532 asoc->last_control_chunk_from = NULL; 3533 } 3534 sctp_free_remote_addr(net); 3535} 3536 3537/* 3538 * remove a remote endpoint address from an association, it will fail if the 3539 * address does not exist. 3540 */ 3541int 3542sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 3543{ 3544 /* 3545 * Here we need to remove a remote address. This is quite simple, we 3546 * first find it in the list of address for the association 3547 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 3548 * on that item. Note we do not allow it to be removed if there are 3549 * no other addresses. 3550 */ 3551 struct sctp_association *asoc; 3552 struct sctp_nets *net, *net_tmp; 3553 3554 asoc = &stcb->asoc; 3555 3556 /* locate the address */ 3557 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { 3558 net_tmp = TAILQ_NEXT(net, sctp_next); 3559 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 3560 continue; 3561 } 3562 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 3563 remaddr)) { 3564 /* we found the guy */ 3565 if (asoc->numnets < 2) { 3566 /* Must have at LEAST two remote addresses */ 3567 return (-1); 3568 } else { 3569 sctp_remove_net(stcb, net); 3570 return (0); 3571 } 3572 } 3573 } 3574 /* not found. */ 3575 return (-2); 3576} 3577 3578 3579void 3580sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time) 3581{ 3582 struct sctpvtaghead *chain; 3583 struct sctp_tagblock *twait_block; 3584 struct timeval now; 3585 int set, i; 3586 3587 (void)SCTP_GETTIME_TIMEVAL(&now); 3588 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 3589 set = 0; 3590 if (!SCTP_LIST_EMPTY(chain)) { 3591 /* Block(s) present, lets find space, and expire on the fly */ 3592 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 3593 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 3594 if ((twait_block->vtag_block[i].v_tag == 0) && 3595 !set) { 3596 twait_block->vtag_block[i].tv_sec_at_expire = 3597 now.tv_sec + time; 3598 twait_block->vtag_block[i].v_tag = tag; 3599 set = 1; 3600 } else if ((twait_block->vtag_block[i].v_tag) && 3601 ((long)twait_block->vtag_block[i].tv_sec_at_expire > 3602 now.tv_sec)) { 3603 /* Audit expires this guy */ 3604 twait_block->vtag_block[i].tv_sec_at_expire = 0; 3605 twait_block->vtag_block[i].v_tag = 0; 3606 if (set == 0) { 3607 /* Reuse it for my new tag */ 3608 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT; 3609 twait_block->vtag_block[0].v_tag = tag; 3610 set = 1; 3611 } 3612 } 3613 } 3614 if (set) { 3615 /* 3616 * We only do up to the block where we can 3617 * place our tag for audits 3618 */ 3619 break; 3620 } 3621 } 3622 } 3623 /* Need to add a new block to chain */ 3624 if (!set) { 3625 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 3626 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 3627 if (twait_block == NULL) { 3628 return; 3629 } 3630 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 3631 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 3632 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + 3633 SCTP_TIME_WAIT; 3634 twait_block->vtag_block[0].v_tag = tag; 3635 } 3636} 3637 3638 3639static void 3640sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 3641{ 3642 struct sctp_iterator *it; 3643 3644 /* 3645 * Unlock the tcb lock we do this so we avoid a dead lock scenario 3646 * where the iterator is waiting on the TCB lock and the TCB lock is 3647 * waiting on the iterator lock. 3648 */ 3649 it = stcb->asoc.stcb_starting_point_for_iterator; 3650 if (it == NULL) { 3651 return; 3652 } 3653 if (it->inp != stcb->sctp_ep) { 3654 /* hmm, focused on the wrong one? */ 3655 return; 3656 } 3657 if (it->stcb != stcb) { 3658 return; 3659 } 3660 it->stcb = LIST_NEXT(stcb, sctp_tcblist); 3661 if (it->stcb == NULL) { 3662 /* done with all asoc's in this assoc */ 3663 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3664 it->inp = NULL; 3665 } else { 3666 it->inp = LIST_NEXT(inp, sctp_list); 3667 } 3668 } 3669} 3670 3671 3672/* 3673 * Free the association after un-hashing the remote port. 3674 */ 3675int 3676sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 3677{ 3678 int i; 3679 struct sctp_association *asoc; 3680 struct sctp_nets *net, *prev; 3681 struct sctp_laddr *laddr; 3682 struct sctp_tmit_chunk *chk; 3683 struct sctp_asconf_addr *aparam; 3684 struct sctp_stream_reset_list *liste; 3685 struct sctp_queued_to_read *sq; 3686 struct sctp_stream_queue_pending *sp; 3687 sctp_sharedkey_t *shared_key; 3688 struct socket *so; 3689 int ccnt = 0; 3690 int cnt = 0; 3691 3692 /* first, lets purge the entry from the hash table. */ 3693 3694#ifdef SCTP_LOG_CLOSING 3695 sctp_log_closing(inp, stcb, 6); 3696#endif 3697 if (stcb->asoc.state == 0) { 3698#ifdef SCTP_LOG_CLOSING 3699 sctp_log_closing(inp, NULL, 7); 3700#endif 3701 /* there is no asoc, really TSNH :-0 */ 3702 return (1); 3703 } 3704 /* TEMP CODE */ 3705 if (stcb->freed_from_where == 0) { 3706 /* Only record the first place free happened from */ 3707 stcb->freed_from_where = from_location; 3708 } 3709 /* TEMP CODE */ 3710 3711 asoc = &stcb->asoc; 3712 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3713 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3714 /* nothing around */ 3715 so = NULL; 3716 else 3717 so = inp->sctp_socket; 3718 3719 /* 3720 * We used timer based freeing if a reader or writer is in the way. 3721 * So we first check if we are actually being called from a timer, 3722 * if so we abort early if a reader or writer is still in the way. 3723 */ 3724 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 3725 (from_inpcbfree == SCTP_NORMAL_PROC)) { 3726 /* 3727 * is it the timer driving us? if so are the reader/writers 3728 * gone? 3729 */ 3730 if (stcb->asoc.refcnt) { 3731 /* nope, reader or writer in the way */ 3732 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3733 /* no asoc destroyed */ 3734 SCTP_TCB_UNLOCK(stcb); 3735#ifdef SCTP_LOG_CLOSING 3736 sctp_log_closing(inp, stcb, 8); 3737#endif 3738 return (0); 3739 } 3740 } 3741 /* now clean up any other timers */ 3742 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 3743 asoc->hb_timer.self = NULL; 3744 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 3745 asoc->dack_timer.self = NULL; 3746 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3747 /*- 3748 * For stream reset we don't blast this unless 3749 * it is a str-reset timer, it might be the 3750 * free-asoc timer which we DON'T want to 3751 * disturb. 3752 */ 3753 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 3754 asoc->strreset_timer.self = NULL; 3755 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 3756 asoc->asconf_timer.self = NULL; 3757 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 3758 asoc->autoclose_timer.self = NULL; 3759 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 3760 asoc->shut_guard_timer.self = NULL; 3761 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 3762 asoc->delayed_event_timer.self = NULL; 3763 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 3764 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 3765 net->fr_timer.self = NULL; 3766 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 3767 net->rxt_timer.self = NULL; 3768 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 3769 net->pmtu_timer.self = NULL; 3770 } 3771 /* Now the read queue needs to be cleaned up (only once) */ 3772 cnt = 0; 3773 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 3774 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 3775 SCTP_INP_READ_LOCK(inp); 3776 TAILQ_FOREACH(sq, &inp->read_queue, next) { 3777 if (sq->stcb == stcb) { 3778 sq->do_not_ref_stcb = 1; 3779 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 3780 /* 3781 * If there is no end, there never will be 3782 * now. 3783 */ 3784 if (sq->end_added == 0) { 3785 /* Held for PD-API clear that. */ 3786 sq->pdapi_aborted = 1; 3787 sq->held_length = 0; 3788 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) { 3789 /* 3790 * Need to add a PD-API 3791 * aborted indication. 3792 * Setting the control_pdapi 3793 * assures that it will be 3794 * added right after this 3795 * msg. 3796 */ 3797 uint32_t strseq; 3798 3799 stcb->asoc.control_pdapi = sq; 3800 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 3801 sctp_notify_partial_delivery_indication(stcb, 3802 SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq); 3803 stcb->asoc.control_pdapi = NULL; 3804 } 3805 } 3806 /* Add an end to wake them */ 3807 sq->end_added = 1; 3808 cnt++; 3809 } 3810 } 3811 SCTP_INP_READ_UNLOCK(inp); 3812 if (stcb->block_entry) { 3813 cnt++; 3814 stcb->block_entry->error = ECONNRESET; 3815 stcb->block_entry = NULL; 3816 } 3817 } 3818 if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) { 3819 /* 3820 * reader or writer in the way, we have hopefully given him 3821 * something to chew on above. 3822 */ 3823 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3824 SCTP_TCB_UNLOCK(stcb); 3825 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3826 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3827 /* nothing around */ 3828 so = NULL; 3829 if (so) { 3830 /* Wake any reader/writers */ 3831 sctp_sorwakeup(inp, so); 3832 sctp_sowwakeup(inp, so); 3833 } 3834#ifdef SCTP_LOG_CLOSING 3835 sctp_log_closing(inp, stcb, 9); 3836#endif 3837 /* no asoc destroyed */ 3838 return (0); 3839 } 3840#ifdef SCTP_LOG_CLOSING 3841 sctp_log_closing(inp, stcb, 10); 3842#endif 3843 /* 3844 * When I reach here, no others want to kill the assoc yet.. and I 3845 * own the lock. Now its possible an abort comes in when I do the 3846 * lock exchange below to grab all the locks to do the final take 3847 * out. to prevent this we increment the count, which will start a 3848 * timer and blow out above thus assuring us that we hold exclusive 3849 * killing of the asoc. Note that after getting back the TCB lock we 3850 * will go ahead and increment the counter back up and stop any 3851 * timer a passing stranger may have started :-S 3852 */ 3853 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3854 atomic_add_int(&stcb->asoc.refcnt, 1); 3855 3856 SCTP_TCB_UNLOCK(stcb); 3857 3858 SCTP_ITERATOR_LOCK(); 3859 SCTP_INP_INFO_WLOCK(); 3860 SCTP_INP_WLOCK(inp); 3861 SCTP_TCB_LOCK(stcb); 3862 } 3863 /* Double check the GONE flag */ 3864 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3865 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3866 /* nothing around */ 3867 so = NULL; 3868 3869 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 3870 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 3871 /* 3872 * For TCP type we need special handling when we are 3873 * connected. We also include the peel'ed off ones to. 3874 */ 3875 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 3876 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 3877 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 3878 if (so) { 3879 SOCK_LOCK(so); 3880 if (so->so_rcv.sb_cc == 0) { 3881 so->so_state &= ~(SS_ISCONNECTING | 3882 SS_ISDISCONNECTING | 3883 SS_ISCONFIRMING | 3884 SS_ISCONNECTED); 3885 } 3886 SOCK_UNLOCK(so); 3887 sctp_sowwakeup(inp, so); 3888 sctp_sorwakeup(inp, so); 3889 SCTP_SOWAKEUP(so); 3890 } 3891 } 3892 } 3893 /* 3894 * Make it invalid too, that way if its about to run it will abort 3895 * and return. 3896 */ 3897 sctp_iterator_asoc_being_freed(inp, stcb); 3898 /* re-increment the lock */ 3899 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3900 atomic_add_int(&stcb->asoc.refcnt, -1); 3901 } 3902 asoc->state = 0; 3903 if (inp->sctp_tcbhash) { 3904 LIST_REMOVE(stcb, sctp_tcbhash); 3905 } 3906 if (stcb->asoc.in_restart_hash) { 3907 LIST_REMOVE(stcb, sctp_tcbrestarhash); 3908 } 3909 /* Now lets remove it from the list of ALL associations in the EP */ 3910 LIST_REMOVE(stcb, sctp_tcblist); 3911 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3912 SCTP_INP_INCR_REF(inp); 3913 SCTP_INP_WUNLOCK(inp); 3914 SCTP_ITERATOR_UNLOCK(); 3915 } 3916 /* pull from vtag hash */ 3917 LIST_REMOVE(stcb, sctp_asocs); 3918 sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT); 3919 3920 3921 /* 3922 * Now restop the timers to be sure - this is paranoia at is finest! 3923 */ 3924 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3925 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 3926 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 3927 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3928 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 3929 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 3930 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 3931 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 3932 3933 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 3934 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 3935 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 3936 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 3937 } 3938 3939 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 3940 prev = NULL; 3941 /* 3942 * The chunk lists and such SHOULD be empty but we check them just 3943 * in case. 3944 */ 3945 /* anything on the wheel needs to be removed */ 3946 for (i = 0; i < asoc->streamoutcnt; i++) { 3947 struct sctp_stream_out *outs; 3948 3949 outs = &asoc->strmout[i]; 3950 /* now clean up any chunks here */ 3951 sp = TAILQ_FIRST(&outs->outqueue); 3952 while (sp) { 3953 TAILQ_REMOVE(&outs->outqueue, sp, next); 3954 if (sp->data) { 3955 sctp_m_freem(sp->data); 3956 sp->data = NULL; 3957 sp->tail_mbuf = NULL; 3958 } 3959 sctp_free_remote_addr(sp->net); 3960 sctp_free_spbufspace(stcb, asoc, sp); 3961 /* Free the zone stuff */ 3962 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp); 3963 SCTP_DECR_STRMOQ_COUNT(); 3964 /* sa_ignore FREED_MEMORY */ 3965 sp = TAILQ_FIRST(&outs->outqueue); 3966 } 3967 } 3968 3969 /* sa_ignore FREED_MEMORY */ 3970 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { 3971 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); 3972 SCTP_FREE(liste, SCTP_M_STRESET); 3973 } 3974 3975 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 3976 while (sq) { 3977 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 3978 if (sq->data) { 3979 sctp_m_freem(sq->data); 3980 sq->data = NULL; 3981 } 3982 sctp_free_remote_addr(sq->whoFrom); 3983 sq->whoFrom = NULL; 3984 sq->stcb = NULL; 3985 /* Free the ctl entry */ 3986 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); 3987 SCTP_DECR_READQ_COUNT(); 3988 /* sa_ignore FREED_MEMORY */ 3989 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 3990 } 3991 3992 chk = TAILQ_FIRST(&asoc->free_chunks); 3993 while (chk) { 3994 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 3995 if (chk->data) { 3996 sctp_m_freem(chk->data); 3997 chk->data = NULL; 3998 } 3999 ccnt++; 4000 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4001 SCTP_DECR_CHK_COUNT(); 4002 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1); 4003 asoc->free_chunk_cnt--; 4004 /* sa_ignore FREED_MEMORY */ 4005 chk = TAILQ_FIRST(&asoc->free_chunks); 4006 } 4007 /* pending send queue SHOULD be empty */ 4008 if (!TAILQ_EMPTY(&asoc->send_queue)) { 4009 chk = TAILQ_FIRST(&asoc->send_queue); 4010 while (chk) { 4011 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4012 if (chk->data) { 4013 sctp_m_freem(chk->data); 4014 chk->data = NULL; 4015 } 4016 ccnt++; 4017 sctp_free_remote_addr(chk->whoTo); 4018 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4019 SCTP_DECR_CHK_COUNT(); 4020 /* sa_ignore FREED_MEMORY */ 4021 chk = TAILQ_FIRST(&asoc->send_queue); 4022 } 4023 } 4024/* 4025 if(ccnt) { 4026 printf("Freed %d from send_queue\n", ccnt); 4027 ccnt = 0; 4028 } 4029*/ 4030 /* sent queue SHOULD be empty */ 4031 if (!TAILQ_EMPTY(&asoc->sent_queue)) { 4032 chk = TAILQ_FIRST(&asoc->sent_queue); 4033 while (chk) { 4034 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4035 if (chk->data) { 4036 sctp_m_freem(chk->data); 4037 chk->data = NULL; 4038 } 4039 ccnt++; 4040 sctp_free_remote_addr(chk->whoTo); 4041 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4042 SCTP_DECR_CHK_COUNT(); 4043 /* sa_ignore FREED_MEMORY */ 4044 chk = TAILQ_FIRST(&asoc->sent_queue); 4045 } 4046 } 4047/* 4048 if(ccnt) { 4049 printf("Freed %d from sent_queue\n", ccnt); 4050 ccnt = 0; 4051 } 4052*/ 4053 /* control queue MAY not be empty */ 4054 if (!TAILQ_EMPTY(&asoc->control_send_queue)) { 4055 chk = TAILQ_FIRST(&asoc->control_send_queue); 4056 while (chk) { 4057 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4058 if (chk->data) { 4059 sctp_m_freem(chk->data); 4060 chk->data = NULL; 4061 } 4062 ccnt++; 4063 sctp_free_remote_addr(chk->whoTo); 4064 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4065 SCTP_DECR_CHK_COUNT(); 4066 /* sa_ignore FREED_MEMORY */ 4067 chk = TAILQ_FIRST(&asoc->control_send_queue); 4068 } 4069 } 4070/* 4071 if(ccnt) { 4072 printf("Freed %d from ctrl_queue\n", ccnt); 4073 ccnt = 0; 4074 } 4075*/ 4076 if (!TAILQ_EMPTY(&asoc->reasmqueue)) { 4077 chk = TAILQ_FIRST(&asoc->reasmqueue); 4078 while (chk) { 4079 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4080 if (chk->data) { 4081 sctp_m_freem(chk->data); 4082 chk->data = NULL; 4083 } 4084 sctp_free_remote_addr(chk->whoTo); 4085 ccnt++; 4086 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4087 SCTP_DECR_CHK_COUNT(); 4088 /* sa_ignore FREED_MEMORY */ 4089 chk = TAILQ_FIRST(&asoc->reasmqueue); 4090 } 4091 } 4092/* 4093 if(ccnt) { 4094 printf("Freed %d from reasm_queue\n", ccnt); 4095 ccnt = 0; 4096 } 4097*/ 4098 if (asoc->mapping_array) { 4099 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4100 asoc->mapping_array = NULL; 4101 } 4102 /* the stream outs */ 4103 if (asoc->strmout) { 4104 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4105 asoc->strmout = NULL; 4106 } 4107 asoc->streamoutcnt = 0; 4108 if (asoc->strmin) { 4109 struct sctp_queued_to_read *ctl; 4110 4111 for (i = 0; i < asoc->streamincnt; i++) { 4112 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { 4113 /* We have somethings on the streamin queue */ 4114 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4115 while (ctl) { 4116 TAILQ_REMOVE(&asoc->strmin[i].inqueue, 4117 ctl, next); 4118 sctp_free_remote_addr(ctl->whoFrom); 4119 if (ctl->data) { 4120 sctp_m_freem(ctl->data); 4121 ctl->data = NULL; 4122 } 4123 /* 4124 * We don't free the address here 4125 * since all the net's were freed 4126 * above. 4127 */ 4128 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); 4129 SCTP_DECR_READQ_COUNT(); 4130 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4131 } 4132 } 4133 } 4134 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4135 asoc->strmin = NULL; 4136 } 4137 asoc->streamincnt = 0; 4138 while (!TAILQ_EMPTY(&asoc->nets)) { 4139 /* sa_ignore FREED_MEMORY */ 4140 net = TAILQ_FIRST(&asoc->nets); 4141 /* pull from list */ 4142 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) { 4143#ifdef INVARIANTS 4144 panic("no net's left alloc'ed, or list points to itself"); 4145#endif 4146 break; 4147 } 4148 prev = net; 4149 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4150 sctp_free_remote_addr(net); 4151 } 4152 4153 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) { 4154 /* sa_ignore FREED_MEMORY */ 4155 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); 4156 sctp_remove_laddr(laddr); 4157 } 4158 4159 /* pending asconf (address) parameters */ 4160 while (!TAILQ_EMPTY(&asoc->asconf_queue)) { 4161 /* sa_ignore FREED_MEMORY */ 4162 aparam = TAILQ_FIRST(&asoc->asconf_queue); 4163 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 4164 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 4165 } 4166 if (asoc->last_asconf_ack_sent != NULL) { 4167 sctp_m_freem(asoc->last_asconf_ack_sent); 4168 asoc->last_asconf_ack_sent = NULL; 4169 } 4170 /* clean up auth stuff */ 4171 if (asoc->local_hmacs) 4172 sctp_free_hmaclist(asoc->local_hmacs); 4173 if (asoc->peer_hmacs) 4174 sctp_free_hmaclist(asoc->peer_hmacs); 4175 4176 if (asoc->local_auth_chunks) 4177 sctp_free_chunklist(asoc->local_auth_chunks); 4178 if (asoc->peer_auth_chunks) 4179 sctp_free_chunklist(asoc->peer_auth_chunks); 4180 4181 sctp_free_authinfo(&asoc->authinfo); 4182 4183 shared_key = LIST_FIRST(&asoc->shared_keys); 4184 while (shared_key) { 4185 LIST_REMOVE(shared_key, next); 4186 sctp_free_sharedkey(shared_key); 4187 /* sa_ignore FREED_MEMORY */ 4188 shared_key = LIST_FIRST(&asoc->shared_keys); 4189 } 4190 4191 /* Insert new items here :> */ 4192 4193 /* Get rid of LOCK */ 4194 SCTP_TCB_LOCK_DESTROY(stcb); 4195 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4196 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4197 SCTP_INP_INFO_WUNLOCK(); 4198 SCTP_INP_RLOCK(inp); 4199 } 4200#ifdef SCTP_TRACK_FREED_ASOCS 4201 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4202 /* now clean up the tasoc itself */ 4203 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 4204 SCTP_DECR_ASOC_COUNT(); 4205 } else { 4206 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 4207 } 4208#else 4209 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 4210 SCTP_DECR_ASOC_COUNT(); 4211#endif 4212 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4213 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4214 /* 4215 * If its NOT the inp_free calling us AND sctp_close 4216 * as been called, we call back... 4217 */ 4218 SCTP_INP_RUNLOCK(inp); 4219 /* 4220 * This will start the kill timer (if we are the 4221 * lastone) since we hold an increment yet. But this 4222 * is the only safe way to do this since otherwise 4223 * if the socket closes at the same time we are here 4224 * we might collide in the cleanup. 4225 */ 4226 sctp_inpcb_free(inp, 4227 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 4228 SCTP_CALLED_DIRECTLY_NOCMPSET); 4229 SCTP_INP_DECR_REF(inp); 4230 goto out_of; 4231 } else { 4232 /* The socket is still open. */ 4233 SCTP_INP_DECR_REF(inp); 4234 } 4235 } 4236 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4237 SCTP_INP_RUNLOCK(inp); 4238 } 4239out_of: 4240 /* destroyed the asoc */ 4241#ifdef SCTP_LOG_CLOSING 4242 sctp_log_closing(inp, NULL, 11); 4243#endif 4244 return (1); 4245} 4246 4247 4248 4249/* 4250 * determine if a destination is "reachable" based upon the addresses bound 4251 * to the current endpoint (e.g. only v4 or v6 currently bound) 4252 */ 4253/* 4254 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 4255 * assoc level v4/v6 flags, as the assoc *may* not have the same address 4256 * types bound as its endpoint 4257 */ 4258int 4259sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 4260{ 4261 struct sctp_inpcb *inp; 4262 int answer; 4263 4264 /* 4265 * No locks here, the TCB, in all cases is already locked and an 4266 * assoc is up. There is either a INP lock by the caller applied (in 4267 * asconf case when deleting an address) or NOT in the HB case, 4268 * however if HB then the INP increment is up and the INP will not 4269 * be removed (on top of the fact that we have a TCB lock). So we 4270 * only want to read the sctp_flags, which is either bound-all or 4271 * not.. no protection needed since once an assoc is up you can't be 4272 * changing your binding. 4273 */ 4274 inp = stcb->sctp_ep; 4275 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4276 /* if bound all, destination is not restricted */ 4277 /* 4278 * RRS: Question during lock work: Is this correct? If you 4279 * are bound-all you still might need to obey the V4--V6 4280 * flags??? IMO this bound-all stuff needs to be removed! 4281 */ 4282 return (1); 4283 } 4284 /* NOTE: all "scope" checks are done when local addresses are added */ 4285 if (destaddr->sa_family == AF_INET6) { 4286 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 4287 } else if (destaddr->sa_family == AF_INET) { 4288 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 4289 } else { 4290 /* invalid family, so it's unreachable */ 4291 answer = 0; 4292 } 4293 return (answer); 4294} 4295 4296/* 4297 * update the inp_vflags on an endpoint 4298 */ 4299static void 4300sctp_update_ep_vflag(struct sctp_inpcb *inp) 4301{ 4302 struct sctp_laddr *laddr; 4303 4304 /* first clear the flag */ 4305 inp->ip_inp.inp.inp_vflag = 0; 4306 /* set the flag based on addresses on the ep list */ 4307 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4308 if (laddr->ifa == NULL) { 4309 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 4310 __FUNCTION__); 4311 continue; 4312 } 4313 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 4314 continue; 4315 } 4316 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 4317 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4318 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 4319 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4320 } 4321 } 4322} 4323 4324/* 4325 * Add the address to the endpoint local address list There is nothing to be 4326 * done if we are bound to all addresses 4327 */ 4328void 4329sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 4330{ 4331 struct sctp_laddr *laddr; 4332 int fnd, error = 0; 4333 4334 fnd = 0; 4335 4336 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4337 /* You are already bound to all. You have it already */ 4338 return; 4339 } 4340 if (ifa->address.sa.sa_family == AF_INET6) { 4341 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 4342 /* Can't bind a non-useable addr. */ 4343 return; 4344 } 4345 } 4346 /* first, is it already present? */ 4347 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4348 if (laddr->ifa == ifa) { 4349 fnd = 1; 4350 break; 4351 } 4352 } 4353 4354 if (fnd == 0) { 4355 /* Not in the ep list */ 4356 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 4357 if (error != 0) 4358 return; 4359 inp->laddr_count++; 4360 /* update inp_vflag flags */ 4361 if (ifa->address.sa.sa_family == AF_INET6) { 4362 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4363 } else if (ifa->address.sa.sa_family == AF_INET) { 4364 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4365 } 4366 } 4367 return; 4368} 4369 4370 4371/* 4372 * select a new (hopefully reachable) destination net (should only be used 4373 * when we deleted an ep addr that is the only usable source address to reach 4374 * the destination net) 4375 */ 4376static void 4377sctp_select_primary_destination(struct sctp_tcb *stcb) 4378{ 4379 struct sctp_nets *net; 4380 4381 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4382 /* for now, we'll just pick the first reachable one we find */ 4383 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 4384 continue; 4385 if (sctp_destination_is_reachable(stcb, 4386 (struct sockaddr *)&net->ro._l_addr)) { 4387 /* found a reachable destination */ 4388 stcb->asoc.primary_destination = net; 4389 } 4390 } 4391 /* I can't there from here! ...we're gonna die shortly... */ 4392} 4393 4394 4395/* 4396 * Delete the address from the endpoint local address list There is nothing 4397 * to be done if we are bound to all addresses 4398 */ 4399void 4400sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 4401{ 4402 struct sctp_laddr *laddr; 4403 int fnd; 4404 4405 fnd = 0; 4406 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4407 /* You are already bound to all. You have it already */ 4408 return; 4409 } 4410 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4411 if (laddr->ifa == ifa) { 4412 fnd = 1; 4413 break; 4414 } 4415 } 4416 if (fnd && (inp->laddr_count < 2)) { 4417 /* can't delete unless there are at LEAST 2 addresses */ 4418 return; 4419 } 4420 if (fnd) { 4421 /* 4422 * clean up any use of this address go through our 4423 * associations and clear any last_used_address that match 4424 * this one for each assoc, see if a new primary_destination 4425 * is needed 4426 */ 4427 struct sctp_tcb *stcb; 4428 4429 /* clean up "next_addr_touse" */ 4430 if (inp->next_addr_touse == laddr) 4431 /* delete this address */ 4432 inp->next_addr_touse = NULL; 4433 4434 /* clean up "last_used_address" */ 4435 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 4436 struct sctp_nets *net; 4437 4438 SCTP_TCB_LOCK(stcb); 4439 if (stcb->asoc.last_used_address == laddr) 4440 /* delete this address */ 4441 stcb->asoc.last_used_address = NULL; 4442 /* 4443 * Now spin through all the nets and purge any ref 4444 * to laddr 4445 */ 4446 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4447 if (net->ro._s_addr && 4448 (net->ro._s_addr->ifa == laddr->ifa)) { 4449 /* Yep, purge src address selected */ 4450 sctp_rtentry_t *rt; 4451 4452 /* delete this address if cached */ 4453 rt = net->ro.ro_rt; 4454 if (rt != NULL) { 4455 RTFREE(rt); 4456 net->ro.ro_rt = NULL; 4457 } 4458 sctp_free_ifa(net->ro._s_addr); 4459 net->ro._s_addr = NULL; 4460 net->src_addr_selected = 0; 4461 } 4462 } 4463 SCTP_TCB_UNLOCK(stcb); 4464 } /* for each tcb */ 4465 /* remove it from the ep list */ 4466 sctp_remove_laddr(laddr); 4467 inp->laddr_count--; 4468 /* update inp_vflag flags */ 4469 sctp_update_ep_vflag(inp); 4470 } 4471 return; 4472} 4473 4474/* 4475 * Add the address to the TCB local address restricted list. 4476 * This is a "pending" address list (eg. addresses waiting for an 4477 * ASCONF-ACK response) and cannot be used as a valid source address. 4478 */ 4479void 4480sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 4481{ 4482 struct sctp_inpcb *inp; 4483 struct sctp_laddr *laddr; 4484 struct sctpladdr *list; 4485 4486 /* 4487 * Assumes TCB is locked.. and possibly the INP. May need to 4488 * confirm/fix that if we need it and is not the case. 4489 */ 4490 list = &stcb->asoc.sctp_restricted_addrs; 4491 4492 inp = stcb->sctp_ep; 4493 if (ifa->address.sa.sa_family == AF_INET6) { 4494 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 4495 /* Can't bind a non-existent addr. */ 4496 return; 4497 } 4498 } 4499 /* does the address already exist? */ 4500 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 4501 if (laddr->ifa == ifa) { 4502 return; 4503 } 4504 } 4505 4506 /* add to the list */ 4507 (void)sctp_insert_laddr(list, ifa, 0); 4508 return; 4509} 4510 4511/* 4512 * insert an laddr entry with the given ifa for the desired list 4513 */ 4514int 4515sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 4516{ 4517 struct sctp_laddr *laddr; 4518 4519 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 4520 if (laddr == NULL) { 4521 /* out of memory? */ 4522 return (EINVAL); 4523 } 4524 SCTP_INCR_LADDR_COUNT(); 4525 bzero(laddr, sizeof(*laddr)); 4526 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 4527 laddr->ifa = ifa; 4528 laddr->action = act; 4529 atomic_add_int(&ifa->refcount, 1); 4530 /* insert it */ 4531 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 4532 4533 return (0); 4534} 4535 4536/* 4537 * Remove an laddr entry from the local address list (on an assoc) 4538 */ 4539void 4540sctp_remove_laddr(struct sctp_laddr *laddr) 4541{ 4542 4543 /* remove from the list */ 4544 LIST_REMOVE(laddr, sctp_nxt_addr); 4545 sctp_free_ifa(laddr->ifa); 4546 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr); 4547 SCTP_DECR_LADDR_COUNT(); 4548} 4549 4550/* 4551 * Remove a local address from the TCB local address restricted list 4552 */ 4553void 4554sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 4555{ 4556 struct sctp_inpcb *inp; 4557 struct sctp_laddr *laddr; 4558 4559 /* 4560 * This is called by asconf work. It is assumed that a) The TCB is 4561 * locked and b) The INP is locked. This is true in as much as I can 4562 * trace through the entry asconf code where I did these locks. 4563 * Again, the ASCONF code is a bit different in that it does lock 4564 * the INP during its work often times. This must be since we don't 4565 * want other proc's looking up things while what they are looking 4566 * up is changing :-D 4567 */ 4568 4569 inp = stcb->sctp_ep; 4570 /* if subset bound and don't allow ASCONF's, can't delete last */ 4571 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 4572 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 4573 if (stcb->sctp_ep->laddr_count < 2) { 4574 /* can't delete last address */ 4575 return; 4576 } 4577 } 4578 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 4579 /* remove the address if it exists */ 4580 if (laddr->ifa == NULL) 4581 continue; 4582 if (laddr->ifa == ifa) { 4583 sctp_remove_laddr(laddr); 4584 return; 4585 } 4586 } 4587 4588 /* address not found! */ 4589 return; 4590} 4591 4592static char sctp_pcb_initialized = 0; 4593 4594/* 4595 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 4596 */ 4597/* sysctl */ 4598static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 4599static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 4600 4601void 4602sctp_pcb_init() 4603{ 4604 /* 4605 * SCTP initialization for the PCB structures should be called by 4606 * the sctp_init() funciton. 4607 */ 4608 int i; 4609 4610 if (sctp_pcb_initialized != 0) { 4611 /* error I was called twice */ 4612 return; 4613 } 4614 sctp_pcb_initialized = 1; 4615 4616 bzero(&sctpstat, sizeof(struct sctpstat)); 4617 (void)SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime); 4618 /* init the empty list of (All) Endpoints */ 4619 LIST_INIT(&sctppcbinfo.listhead); 4620 4621 /* init the iterator head */ 4622 TAILQ_INIT(&sctppcbinfo.iteratorhead); 4623 4624 /* init the hash table of endpoints */ 4625 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize); 4626 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize); 4627 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale); 4628 sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31), 4629 &sctppcbinfo.hashasocmark); 4630 sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize, 4631 &sctppcbinfo.hashmark); 4632 sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize, 4633 &sctppcbinfo.hashtcpmark); 4634 sctppcbinfo.hashtblsize = sctp_hashtblsize; 4635 4636 /* init the small hash table we use to track restarted asoc's */ 4637 sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, 4638 &sctppcbinfo.hashrestartmark); 4639 4640 4641 sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 4642 &sctppcbinfo.hashvrfmark); 4643 4644 sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 4645 &sctppcbinfo.vrf_ifn_hashmark); 4646 4647 /* init the zones */ 4648 /* 4649 * FIX ME: Should check for NULL returns, but if it does fail we are 4650 * doomed to panic anyways... add later maybe. 4651 */ 4652 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep", 4653 sizeof(struct sctp_inpcb), maxsockets); 4654 4655 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc", 4656 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 4657 4658 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr", 4659 sizeof(struct sctp_laddr), 4660 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 4661 4662 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr", 4663 sizeof(struct sctp_nets), 4664 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 4665 4666 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk", 4667 sizeof(struct sctp_tmit_chunk), 4668 (sctp_max_number_of_assoc * sctp_chunkscale)); 4669 4670 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq", 4671 sizeof(struct sctp_queued_to_read), 4672 (sctp_max_number_of_assoc * sctp_chunkscale)); 4673 4674 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out", 4675 sizeof(struct sctp_stream_queue_pending), 4676 (sctp_max_number_of_assoc * sctp_chunkscale)); 4677 4678 /* Master Lock INIT for info structure */ 4679 SCTP_INP_INFO_LOCK_INIT(); 4680 SCTP_STATLOG_INIT_LOCK(); 4681 SCTP_ITERATOR_LOCK_INIT(); 4682 4683 SCTP_IPI_COUNT_INIT(); 4684 SCTP_IPI_ADDR_INIT(); 4685 SCTP_IPI_ITERATOR_WQ_INIT(); 4686#ifdef SCTP_PACKET_LOGGING 4687 SCTP_IP_PKTLOG_INIT(); 4688#endif 4689 LIST_INIT(&sctppcbinfo.addr_wq); 4690 4691 /* not sure if we need all the counts */ 4692 sctppcbinfo.ipi_count_ep = 0; 4693 /* assoc/tcb zone info */ 4694 sctppcbinfo.ipi_count_asoc = 0; 4695 /* local addrlist zone info */ 4696 sctppcbinfo.ipi_count_laddr = 0; 4697 /* remote addrlist zone info */ 4698 sctppcbinfo.ipi_count_raddr = 0; 4699 /* chunk info */ 4700 sctppcbinfo.ipi_count_chunk = 0; 4701 4702 /* socket queue zone info */ 4703 sctppcbinfo.ipi_count_readq = 0; 4704 4705 /* stream out queue cont */ 4706 sctppcbinfo.ipi_count_strmoq = 0; 4707 4708 sctppcbinfo.ipi_free_strmoq = 0; 4709 sctppcbinfo.ipi_free_chunks = 0; 4710 4711 SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer); 4712 4713 /* Init the TIMEWAIT list */ 4714 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) { 4715 LIST_INIT(&sctppcbinfo.vtag_timewait[i]); 4716 } 4717 4718#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 4719 sctppcbinfo.iterator_running = 0; 4720 sctp_startup_iterator(); 4721#endif 4722 4723 /* 4724 * INIT the default VRF which for BSD is the only one, other O/S's 4725 * may have more. But initially they must start with one and then 4726 * add the VRF's as addresses are added. 4727 */ 4728 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 4729 4730} 4731 4732 4733int 4734sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 4735 int iphlen, int offset, int limit, struct sctphdr *sh, 4736 struct sockaddr *altsa) 4737{ 4738 /* 4739 * grub through the INIT pulling addresses and loading them to the 4740 * nets structure in the asoc. The from address in the mbuf should 4741 * also be loaded (if it is not already). This routine can be called 4742 * with either INIT or INIT-ACK's as long as the m points to the IP 4743 * packet and the offset points to the beginning of the parameters. 4744 */ 4745 struct sctp_inpcb *inp, *l_inp; 4746 struct sctp_nets *net, *net_tmp; 4747 struct ip *iph; 4748 struct sctp_paramhdr *phdr, parm_buf; 4749 struct sctp_tcb *stcb_tmp; 4750 uint16_t ptype, plen; 4751 struct sockaddr *sa; 4752 struct sockaddr_storage dest_store; 4753 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 4754 struct sockaddr_in sin; 4755 struct sockaddr_in6 sin6; 4756 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 4757 struct sctp_auth_random *p_random = NULL; 4758 uint16_t random_len = 0; 4759 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 4760 struct sctp_auth_hmac_algo *hmacs = NULL; 4761 uint16_t hmacs_len = 0; 4762 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 4763 struct sctp_auth_chunk_list *chunks = NULL; 4764 uint16_t num_chunks = 0; 4765 sctp_key_t *new_key; 4766 uint32_t keylen; 4767 int got_random = 0, got_hmacs = 0, got_chklist = 0; 4768 4769 /* First get the destination address setup too. */ 4770 memset(&sin, 0, sizeof(sin)); 4771 memset(&sin6, 0, sizeof(sin6)); 4772 4773 sin.sin_family = AF_INET; 4774 sin.sin_len = sizeof(sin); 4775 sin.sin_port = stcb->rport; 4776 4777 sin6.sin6_family = AF_INET6; 4778 sin6.sin6_len = sizeof(struct sockaddr_in6); 4779 sin6.sin6_port = stcb->rport; 4780 if (altsa == NULL) { 4781 iph = mtod(m, struct ip *); 4782 if (iph->ip_v == IPVERSION) { 4783 /* its IPv4 */ 4784 struct sockaddr_in *sin_2; 4785 4786 sin_2 = (struct sockaddr_in *)(local_sa); 4787 memset(sin_2, 0, sizeof(sin)); 4788 sin_2->sin_family = AF_INET; 4789 sin_2->sin_len = sizeof(sin); 4790 sin_2->sin_port = sh->dest_port; 4791 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 4792 sin.sin_addr = iph->ip_src; 4793 sa = (struct sockaddr *)&sin; 4794 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 4795 /* its IPv6 */ 4796 struct ip6_hdr *ip6; 4797 struct sockaddr_in6 *sin6_2; 4798 4799 ip6 = mtod(m, struct ip6_hdr *); 4800 sin6_2 = (struct sockaddr_in6 *)(local_sa); 4801 memset(sin6_2, 0, sizeof(sin6)); 4802 sin6_2->sin6_family = AF_INET6; 4803 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 4804 sin6_2->sin6_port = sh->dest_port; 4805 sin6.sin6_addr = ip6->ip6_src; 4806 sa = (struct sockaddr *)&sin6; 4807 } else { 4808 sa = NULL; 4809 } 4810 } else { 4811 /* 4812 * For cookies we use the src address NOT from the packet 4813 * but from the original INIT 4814 */ 4815 sa = altsa; 4816 } 4817 /* Turn off ECN until we get through all params */ 4818 stcb->asoc.ecn_allowed = 0; 4819 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4820 /* mark all addresses that we have currently on the list */ 4821 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 4822 } 4823 /* does the source address already exist? if so skip it */ 4824 l_inp = inp = stcb->sctp_ep; 4825 4826 atomic_add_int(&stcb->asoc.refcnt, 1); 4827 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 4828 atomic_add_int(&stcb->asoc.refcnt, -1); 4829 4830 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 4831 /* we must add the source address */ 4832 /* no scope set here since we have a tcb already. */ 4833 if ((sa->sa_family == AF_INET) && 4834 (stcb->asoc.ipv4_addr_legal)) { 4835 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 4836 return (-1); 4837 } 4838 } else if ((sa->sa_family == AF_INET6) && 4839 (stcb->asoc.ipv6_addr_legal)) { 4840 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 4841 return (-2); 4842 } 4843 } 4844 } else { 4845 if (net_tmp != NULL && stcb_tmp == stcb) { 4846 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 4847 } else if (stcb_tmp != stcb) { 4848 /* It belongs to another association? */ 4849 if (stcb_tmp) 4850 SCTP_TCB_UNLOCK(stcb_tmp); 4851 return (-3); 4852 } 4853 } 4854 if (stcb->asoc.state == 0) { 4855 /* the assoc was freed? */ 4856 return (-4); 4857 } 4858 /* 4859 * peer must explicitly turn this on. This may have been initialized 4860 * to be "on" in order to allow local addr changes while INIT's are 4861 * in flight. 4862 */ 4863 stcb->asoc.peer_supports_asconf = 0; 4864 /* now we must go through each of the params. */ 4865 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 4866 while (phdr) { 4867 ptype = ntohs(phdr->param_type); 4868 plen = ntohs(phdr->param_length); 4869 /* 4870 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 4871 * (int)plen); 4872 */ 4873 if (offset + plen > limit) { 4874 break; 4875 } 4876 if (plen == 0) { 4877 break; 4878 } 4879 if (ptype == SCTP_IPV4_ADDRESS) { 4880 if (stcb->asoc.ipv4_addr_legal) { 4881 struct sctp_ipv4addr_param *p4, p4_buf; 4882 4883 /* ok get the v4 address and check/add */ 4884 phdr = sctp_get_next_param(m, offset, 4885 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 4886 if (plen != sizeof(struct sctp_ipv4addr_param) || 4887 phdr == NULL) { 4888 return (-5); 4889 } 4890 p4 = (struct sctp_ipv4addr_param *)phdr; 4891 sin.sin_addr.s_addr = p4->addr; 4892 if (IN_MULTICAST(sin.sin_addr.s_addr)) { 4893 /* Skip multi-cast addresses */ 4894 goto next_param; 4895 } 4896 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 4897 (sin.sin_addr.s_addr == INADDR_ANY)) { 4898 goto next_param; 4899 } 4900 sa = (struct sockaddr *)&sin; 4901 inp = stcb->sctp_ep; 4902 atomic_add_int(&stcb->asoc.refcnt, 1); 4903 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 4904 local_sa, stcb); 4905 atomic_add_int(&stcb->asoc.refcnt, -1); 4906 4907 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 4908 inp == NULL) { 4909 /* we must add the source address */ 4910 /* 4911 * no scope set since we have a tcb 4912 * already 4913 */ 4914 4915 /* 4916 * we must validate the state again 4917 * here 4918 */ 4919 if (stcb->asoc.state == 0) { 4920 /* the assoc was freed? */ 4921 return (-7); 4922 } 4923 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 4924 return (-8); 4925 } 4926 } else if (stcb_tmp == stcb) { 4927 if (stcb->asoc.state == 0) { 4928 /* the assoc was freed? */ 4929 return (-10); 4930 } 4931 if (net != NULL) { 4932 /* clear flag */ 4933 net->dest_state &= 4934 ~SCTP_ADDR_NOT_IN_ASSOC; 4935 } 4936 } else { 4937 /* 4938 * strange, address is in another 4939 * assoc? straighten out locks. 4940 */ 4941 if (stcb_tmp) 4942 SCTP_TCB_UNLOCK(stcb_tmp); 4943 4944 if (stcb->asoc.state == 0) { 4945 /* the assoc was freed? */ 4946 return (-12); 4947 } 4948 return (-13); 4949 } 4950 } 4951 } else if (ptype == SCTP_IPV6_ADDRESS) { 4952 if (stcb->asoc.ipv6_addr_legal) { 4953 /* ok get the v6 address and check/add */ 4954 struct sctp_ipv6addr_param *p6, p6_buf; 4955 4956 phdr = sctp_get_next_param(m, offset, 4957 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 4958 if (plen != sizeof(struct sctp_ipv6addr_param) || 4959 phdr == NULL) { 4960 return (-14); 4961 } 4962 p6 = (struct sctp_ipv6addr_param *)phdr; 4963 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 4964 sizeof(p6->addr)); 4965 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 4966 /* Skip multi-cast addresses */ 4967 goto next_param; 4968 } 4969 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 4970 /* 4971 * Link local make no sense without 4972 * scope 4973 */ 4974 goto next_param; 4975 } 4976 sa = (struct sockaddr *)&sin6; 4977 inp = stcb->sctp_ep; 4978 atomic_add_int(&stcb->asoc.refcnt, 1); 4979 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 4980 local_sa, stcb); 4981 atomic_add_int(&stcb->asoc.refcnt, -1); 4982 if (stcb_tmp == NULL && (inp == stcb->sctp_ep || 4983 inp == NULL)) { 4984 /* 4985 * we must validate the state again 4986 * here 4987 */ 4988 if (stcb->asoc.state == 0) { 4989 /* the assoc was freed? */ 4990 return (-16); 4991 } 4992 /* 4993 * we must add the address, no scope 4994 * set 4995 */ 4996 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 4997 return (-17); 4998 } 4999 } else if (stcb_tmp == stcb) { 5000 /* 5001 * we must validate the state again 5002 * here 5003 */ 5004 if (stcb->asoc.state == 0) { 5005 /* the assoc was freed? */ 5006 return (-19); 5007 } 5008 if (net != NULL) { 5009 /* clear flag */ 5010 net->dest_state &= 5011 ~SCTP_ADDR_NOT_IN_ASSOC; 5012 } 5013 } else { 5014 /* 5015 * strange, address is in another 5016 * assoc? straighten out locks. 5017 */ 5018 if (stcb_tmp) 5019 SCTP_TCB_UNLOCK(stcb_tmp); 5020 5021 if (stcb->asoc.state == 0) { 5022 /* the assoc was freed? */ 5023 return (-21); 5024 } 5025 return (-22); 5026 } 5027 } 5028 } else if (ptype == SCTP_ECN_CAPABLE) { 5029 stcb->asoc.ecn_allowed = 1; 5030 } else if (ptype == SCTP_ULP_ADAPTATION) { 5031 if (stcb->asoc.state != SCTP_STATE_OPEN) { 5032 struct sctp_adaptation_layer_indication ai, 5033 *aip; 5034 5035 phdr = sctp_get_next_param(m, offset, 5036 (struct sctp_paramhdr *)&ai, sizeof(ai)); 5037 aip = (struct sctp_adaptation_layer_indication *)phdr; 5038 if (aip) { 5039 sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION, 5040 stcb, ntohl(aip->indication), NULL); 5041 } 5042 } 5043 } else if (ptype == SCTP_SET_PRIM_ADDR) { 5044 struct sctp_asconf_addr_param lstore, *fee; 5045 struct sctp_asconf_addrv4_param *fii; 5046 int lptype; 5047 struct sockaddr *lsa = NULL; 5048 5049 stcb->asoc.peer_supports_asconf = 1; 5050 if (plen > sizeof(lstore)) { 5051 return (-23); 5052 } 5053 phdr = sctp_get_next_param(m, offset, 5054 (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore))); 5055 if (phdr == NULL) { 5056 return (-24); 5057 } 5058 fee = (struct sctp_asconf_addr_param *)phdr; 5059 lptype = ntohs(fee->addrp.ph.param_type); 5060 if (lptype == SCTP_IPV4_ADDRESS) { 5061 if (plen != 5062 sizeof(struct sctp_asconf_addrv4_param)) { 5063 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 5064 (int)sizeof(struct sctp_asconf_addrv4_param), 5065 plen); 5066 } else { 5067 fii = (struct sctp_asconf_addrv4_param *)fee; 5068 sin.sin_addr.s_addr = fii->addrp.addr; 5069 lsa = (struct sockaddr *)&sin; 5070 } 5071 } else if (lptype == SCTP_IPV6_ADDRESS) { 5072 if (plen != 5073 sizeof(struct sctp_asconf_addr_param)) { 5074 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 5075 (int)sizeof(struct sctp_asconf_addr_param), 5076 plen); 5077 } else { 5078 memcpy(sin6.sin6_addr.s6_addr, 5079 fee->addrp.addr, 5080 sizeof(fee->addrp.addr)); 5081 lsa = (struct sockaddr *)&sin6; 5082 } 5083 } 5084 if (lsa) { 5085 (void)sctp_set_primary_addr(stcb, sa, NULL); 5086 } 5087 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 5088 /* Peer supports pr-sctp */ 5089 stcb->asoc.peer_supports_prsctp = 1; 5090 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 5091 /* A supported extension chunk */ 5092 struct sctp_supported_chunk_types_param *pr_supported; 5093 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 5094 int num_ent, i; 5095 5096 phdr = sctp_get_next_param(m, offset, 5097 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 5098 if (phdr == NULL) { 5099 return (-25); 5100 } 5101 stcb->asoc.peer_supports_asconf = 0; 5102 stcb->asoc.peer_supports_prsctp = 0; 5103 stcb->asoc.peer_supports_pktdrop = 0; 5104 stcb->asoc.peer_supports_strreset = 0; 5105 stcb->asoc.peer_supports_auth = 0; 5106 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 5107 num_ent = plen - sizeof(struct sctp_paramhdr); 5108 for (i = 0; i < num_ent; i++) { 5109 switch (pr_supported->chunk_types[i]) { 5110 case SCTP_ASCONF: 5111 case SCTP_ASCONF_ACK: 5112 stcb->asoc.peer_supports_asconf = 1; 5113 break; 5114 case SCTP_FORWARD_CUM_TSN: 5115 stcb->asoc.peer_supports_prsctp = 1; 5116 break; 5117 case SCTP_PACKET_DROPPED: 5118 stcb->asoc.peer_supports_pktdrop = 1; 5119 break; 5120 case SCTP_STREAM_RESET: 5121 stcb->asoc.peer_supports_strreset = 1; 5122 break; 5123 case SCTP_AUTHENTICATION: 5124 stcb->asoc.peer_supports_auth = 1; 5125 break; 5126 default: 5127 /* one I have not learned yet */ 5128 break; 5129 5130 } 5131 } 5132 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 5133 /* Peer supports ECN-nonce */ 5134 stcb->asoc.peer_supports_ecn_nonce = 1; 5135 stcb->asoc.ecn_nonce_allowed = 1; 5136 } else if (ptype == SCTP_RANDOM) { 5137 if (plen > sizeof(random_store)) 5138 break; 5139 if (got_random) { 5140 /* already processed a RANDOM */ 5141 goto next_param; 5142 } 5143 phdr = sctp_get_next_param(m, offset, 5144 (struct sctp_paramhdr *)random_store, 5145 min(sizeof(random_store), plen)); 5146 if (phdr == NULL) 5147 return (-26); 5148 p_random = (struct sctp_auth_random *)phdr; 5149 random_len = plen - sizeof(*p_random); 5150 /* enforce the random length */ 5151 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 5152 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 5153 return (-27); 5154 } 5155 got_random = 1; 5156 } else if (ptype == SCTP_HMAC_LIST) { 5157 int num_hmacs; 5158 int i; 5159 5160 if (plen > sizeof(hmacs_store)) 5161 break; 5162 if (got_hmacs) { 5163 /* already processed a HMAC list */ 5164 goto next_param; 5165 } 5166 phdr = sctp_get_next_param(m, offset, 5167 (struct sctp_paramhdr *)hmacs_store, 5168 min(plen, sizeof(hmacs_store))); 5169 if (phdr == NULL) 5170 return (-28); 5171 hmacs = (struct sctp_auth_hmac_algo *)phdr; 5172 hmacs_len = plen - sizeof(*hmacs); 5173 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 5174 /* validate the hmac list */ 5175 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 5176 return (-29); 5177 } 5178 if (stcb->asoc.peer_hmacs != NULL) 5179 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 5180 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 5181 if (stcb->asoc.peer_hmacs != NULL) { 5182 for (i = 0; i < num_hmacs; i++) { 5183 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 5184 ntohs(hmacs->hmac_ids[i])); 5185 } 5186 } 5187 got_hmacs = 1; 5188 } else if (ptype == SCTP_CHUNK_LIST) { 5189 int i; 5190 5191 if (plen > sizeof(chunks_store)) 5192 break; 5193 if (got_chklist) { 5194 /* already processed a Chunks list */ 5195 goto next_param; 5196 } 5197 phdr = sctp_get_next_param(m, offset, 5198 (struct sctp_paramhdr *)chunks_store, 5199 min(plen, sizeof(chunks_store))); 5200 if (phdr == NULL) 5201 return (-30); 5202 chunks = (struct sctp_auth_chunk_list *)phdr; 5203 num_chunks = plen - sizeof(*chunks); 5204 if (stcb->asoc.peer_auth_chunks != NULL) 5205 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 5206 else 5207 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 5208 for (i = 0; i < num_chunks; i++) { 5209 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 5210 stcb->asoc.peer_auth_chunks); 5211 } 5212 got_chklist = 1; 5213 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 5214 (ptype == SCTP_STATE_COOKIE) || 5215 (ptype == SCTP_UNRECOG_PARAM) || 5216 (ptype == SCTP_COOKIE_PRESERVE) || 5217 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 5218 (ptype == SCTP_ADD_IP_ADDRESS) || 5219 (ptype == SCTP_DEL_IP_ADDRESS) || 5220 (ptype == SCTP_ERROR_CAUSE_IND) || 5221 (ptype == SCTP_SUCCESS_REPORT)) { 5222 /* don't care */ ; 5223 } else { 5224 if ((ptype & 0x8000) == 0x0000) { 5225 /* 5226 * must stop processing the rest of the 5227 * param's. Any report bits were handled 5228 * with the call to 5229 * sctp_arethere_unrecognized_parameters() 5230 * when the INIT or INIT-ACK was first seen. 5231 */ 5232 break; 5233 } 5234 } 5235next_param: 5236 offset += SCTP_SIZE32(plen); 5237 if (offset >= limit) { 5238 break; 5239 } 5240 phdr = sctp_get_next_param(m, offset, &parm_buf, 5241 sizeof(parm_buf)); 5242 } 5243 /* Now check to see if we need to purge any addresses */ 5244 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { 5245 net_tmp = TAILQ_NEXT(net, sctp_next); 5246 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 5247 SCTP_ADDR_NOT_IN_ASSOC) { 5248 /* This address has been removed from the asoc */ 5249 /* remove and free it */ 5250 stcb->asoc.numnets--; 5251 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 5252 sctp_free_remote_addr(net); 5253 if (net == stcb->asoc.primary_destination) { 5254 stcb->asoc.primary_destination = NULL; 5255 sctp_select_primary_destination(stcb); 5256 } 5257 } 5258 } 5259 /* validate authentication required parameters */ 5260 if (got_random && got_hmacs) { 5261 stcb->asoc.peer_supports_auth = 1; 5262 } else { 5263 stcb->asoc.peer_supports_auth = 0; 5264 } 5265 if (!stcb->asoc.peer_supports_auth && got_chklist) { 5266 /* peer does not support auth but sent a chunks list? */ 5267 return (-31); 5268 } 5269 if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf && 5270 !stcb->asoc.peer_supports_auth) { 5271 /* peer supports asconf but not auth? */ 5272 return (-32); 5273 } 5274 /* concatenate the full random key */ 5275#ifdef SCTP_AUTH_DRAFT_04 5276 keylen = random_len; 5277 new_key = sctp_alloc_key(keylen); 5278 if (new_key != NULL) { 5279 /* copy in the RANDOM */ 5280 if (p_random != NULL) 5281 bcopy(p_random->random_data, new_key->key, random_len); 5282 } 5283#else 5284 keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks + 5285 sizeof(*hmacs) + hmacs_len; 5286 new_key = sctp_alloc_key(keylen); 5287 if (new_key != NULL) { 5288 /* copy in the RANDOM */ 5289 if (p_random != NULL) { 5290 keylen = sizeof(*p_random) + random_len; 5291 bcopy(p_random, new_key->key, keylen); 5292 } 5293 /* append in the AUTH chunks */ 5294 if (chunks != NULL) { 5295 bcopy(chunks, new_key->key + keylen, 5296 sizeof(*chunks) + num_chunks); 5297 keylen += sizeof(*chunks) + num_chunks; 5298 } 5299 /* append in the HMACs */ 5300 if (hmacs != NULL) { 5301 bcopy(hmacs, new_key->key + keylen, 5302 sizeof(*hmacs) + hmacs_len); 5303 } 5304 } 5305#endif 5306 else { 5307 /* failed to get memory for the key */ 5308 return (-33); 5309 } 5310 if (stcb->asoc.authinfo.peer_random != NULL) 5311 sctp_free_key(stcb->asoc.authinfo.peer_random); 5312 stcb->asoc.authinfo.peer_random = new_key; 5313#ifdef SCTP_AUTH_DRAFT_04 5314 /* don't include the chunks and hmacs for draft -04 */ 5315 stcb->asoc.authinfo.peer_random->keylen = random_len; 5316#endif 5317 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 5318 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 5319 5320 return (0); 5321} 5322 5323int 5324sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 5325 struct sctp_nets *net) 5326{ 5327 /* make sure the requested primary address exists in the assoc */ 5328 if (net == NULL && sa) 5329 net = sctp_findnet(stcb, sa); 5330 5331 if (net == NULL) { 5332 /* didn't find the requested primary address! */ 5333 return (-1); 5334 } else { 5335 /* set the primary address */ 5336 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 5337 /* Must be confirmed, so queue to set */ 5338 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 5339 return (0); 5340 } 5341 stcb->asoc.primary_destination = net; 5342 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 5343 net = TAILQ_FIRST(&stcb->asoc.nets); 5344 if (net != stcb->asoc.primary_destination) { 5345 /* 5346 * first one on the list is NOT the primary 5347 * sctp_cmpaddr() is much more efficent if the 5348 * primary is the first on the list, make it so. 5349 */ 5350 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 5351 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 5352 } 5353 return (0); 5354 } 5355} 5356 5357 5358int 5359sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now) 5360{ 5361 /* 5362 * This function serves two purposes. It will see if a TAG can be 5363 * re-used and return 1 for yes it is ok and 0 for don't use that 5364 * tag. A secondary function it will do is purge out old tags that 5365 * can be removed. 5366 */ 5367 struct sctpasochead *head; 5368 struct sctpvtaghead *chain; 5369 struct sctp_tagblock *twait_block; 5370 struct sctp_tcb *stcb; 5371 int i; 5372 5373 SCTP_INP_INFO_WLOCK(); 5374 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 5375 /* First is the vtag in use ? */ 5376 5377 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag, 5378 sctppcbinfo.hashasocmark)]; 5379 if (head == NULL) { 5380 goto check_restart; 5381 } 5382 LIST_FOREACH(stcb, head, sctp_asocs) { 5383 5384 if (stcb->asoc.my_vtag == tag) { 5385 /* 5386 * We should remove this if and return 0 always if 5387 * we want vtags unique across all endpoints. For 5388 * now within a endpoint is ok. 5389 */ 5390 if (inp == stcb->sctp_ep) { 5391 /* bad tag, in use */ 5392 SCTP_INP_INFO_WUNLOCK(); 5393 return (0); 5394 } 5395 } 5396 } 5397check_restart: 5398 /* Now lets check the restart hash */ 5399 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag, 5400 sctppcbinfo.hashrestartmark)]; 5401 if (head == NULL) { 5402 goto check_time_wait; 5403 } 5404 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { 5405 if (stcb->asoc.assoc_id == tag) { 5406 /* candidate */ 5407 if (inp == stcb->sctp_ep) { 5408 /* bad tag, in use */ 5409 SCTP_INP_INFO_WUNLOCK(); 5410 return (0); 5411 } 5412 } 5413 } 5414check_time_wait: 5415 /* Now what about timed wait ? */ 5416 if (!SCTP_LIST_EMPTY(chain)) { 5417 /* 5418 * Block(s) are present, lets see if we have this tag in the 5419 * list 5420 */ 5421 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5422 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 5423 if (twait_block->vtag_block[i].v_tag == 0) { 5424 /* not used */ 5425 continue; 5426 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire > 5427 now->tv_sec) { 5428 /* Audit expires this guy */ 5429 twait_block->vtag_block[i].tv_sec_at_expire = 0; 5430 twait_block->vtag_block[i].v_tag = 0; 5431 } else if (twait_block->vtag_block[i].v_tag == 5432 tag) { 5433 /* Bad tag, sorry :< */ 5434 SCTP_INP_INFO_WUNLOCK(); 5435 return (0); 5436 } 5437 } 5438 } 5439 } 5440 /* Not found, ok to use the tag */ 5441 SCTP_INP_INFO_WUNLOCK(); 5442 return (1); 5443} 5444 5445 5446static sctp_assoc_t reneged_asoc_ids[256]; 5447static uint8_t reneged_at = 0; 5448 5449 5450static void 5451sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 5452{ 5453 /* 5454 * We must hunt this association for MBUF's past the cumack (i.e. 5455 * out of order data that we can renege on). 5456 */ 5457 struct sctp_association *asoc; 5458 struct sctp_tmit_chunk *chk, *nchk; 5459 uint32_t cumulative_tsn_p1, tsn; 5460 struct sctp_queued_to_read *ctl, *nctl; 5461 int cnt, strmat, gap; 5462 5463 /* We look for anything larger than the cum-ack + 1 */ 5464 5465 SCTP_STAT_INCR(sctps_protocol_drain_calls); 5466 if (sctp_do_drain == 0) { 5467 return; 5468 } 5469 asoc = &stcb->asoc; 5470 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 5471 /* none we can reneg on. */ 5472 return; 5473 } 5474 SCTP_STAT_INCR(sctps_protocol_drains_done); 5475 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 5476 cnt = 0; 5477 /* First look in the re-assembly queue */ 5478 chk = TAILQ_FIRST(&asoc->reasmqueue); 5479 while (chk) { 5480 /* Get the next one */ 5481 nchk = TAILQ_NEXT(chk, sctp_next); 5482 if (compare_with_wrap(chk->rec.data.TSN_seq, 5483 cumulative_tsn_p1, MAX_TSN)) { 5484 /* Yep it is above cum-ack */ 5485 cnt++; 5486 tsn = chk->rec.data.TSN_seq; 5487 if (tsn >= asoc->mapping_array_base_tsn) { 5488 gap = tsn - asoc->mapping_array_base_tsn; 5489 } else { 5490 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 5491 tsn + 1; 5492 } 5493 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 5494 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 5495 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 5496 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5497 if (chk->data) { 5498 sctp_m_freem(chk->data); 5499 chk->data = NULL; 5500 } 5501 sctp_free_a_chunk(stcb, chk); 5502 } 5503 chk = nchk; 5504 } 5505 /* Ok that was fun, now we will drain all the inbound streams? */ 5506 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 5507 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); 5508 while (ctl) { 5509 nctl = TAILQ_NEXT(ctl, next); 5510 if (compare_with_wrap(ctl->sinfo_tsn, 5511 cumulative_tsn_p1, MAX_TSN)) { 5512 /* Yep it is above cum-ack */ 5513 cnt++; 5514 tsn = ctl->sinfo_tsn; 5515 if (tsn >= asoc->mapping_array_base_tsn) { 5516 gap = tsn - 5517 asoc->mapping_array_base_tsn; 5518 } else { 5519 gap = (MAX_TSN - 5520 asoc->mapping_array_base_tsn) + 5521 tsn + 1; 5522 } 5523 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 5524 sctp_ucount_decr(asoc->cnt_on_all_streams); 5525 5526 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, 5527 gap); 5528 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, 5529 ctl, next); 5530 if (ctl->data) { 5531 sctp_m_freem(ctl->data); 5532 ctl->data = NULL; 5533 } 5534 sctp_free_remote_addr(ctl->whoFrom); 5535 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); 5536 SCTP_DECR_READQ_COUNT(); 5537 } 5538 ctl = nctl; 5539 } 5540 } 5541 /* 5542 * Question, should we go through the delivery queue? The only 5543 * reason things are on here is the app not reading OR a p-d-api up. 5544 * An attacker COULD send enough in to initiate the PD-API and then 5545 * send a bunch of stuff to other streams... these would wind up on 5546 * the delivery queue.. and then we would not get to them. But in 5547 * order to do this I then have to back-track and un-deliver 5548 * sequence numbers in streams.. el-yucko. I think for now we will 5549 * NOT look at the delivery queue and leave it to be something to 5550 * consider later. An alternative would be to abort the P-D-API with 5551 * a notification and then deliver the data.... Or another method 5552 * might be to keep track of how many times the situation occurs and 5553 * if we see a possible attack underway just abort the association. 5554 */ 5555#ifdef SCTP_DEBUG 5556 if (cnt) { 5557 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 5558 } 5559#endif 5560 if (cnt) { 5561 /* 5562 * Now do we need to find a new 5563 * asoc->highest_tsn_inside_map? 5564 */ 5565 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) { 5566 gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn; 5567 } else { 5568 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 5569 asoc->highest_tsn_inside_map + 1; 5570 } 5571 if (gap >= (asoc->mapping_array_size << 3)) { 5572 /* 5573 * Something bad happened or cum-ack and high were 5574 * behind the base, but if so earlier checks should 5575 * have found NO data... wierd... we will start at 5576 * end of mapping array. 5577 */ 5578 SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n", 5579 (int)gap, 5580 (int)(asoc->mapping_array_size << 3), 5581 (int)asoc->highest_tsn_inside_map); 5582 gap = asoc->mapping_array_size << 3; 5583 } 5584 while (gap > 0) { 5585 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 5586 /* found the new highest */ 5587 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap; 5588 break; 5589 } 5590 gap--; 5591 } 5592 if (gap == 0) { 5593 /* Nothing left in map */ 5594 memset(asoc->mapping_array, 0, asoc->mapping_array_size); 5595 asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1; 5596 asoc->highest_tsn_inside_map = asoc->cumulative_tsn; 5597 } 5598 asoc->last_revoke_count = cnt; 5599 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 5600 sctp_send_sack(stcb); 5601 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN); 5602 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 5603 reneged_at++; 5604 } 5605 /* 5606 * Another issue, in un-setting the TSN's in the mapping array we 5607 * DID NOT adjust the higest_tsn marker. This will cause one of two 5608 * things to occur. It may cause us to do extra work in checking for 5609 * our mapping array movement. More importantly it may cause us to 5610 * SACK every datagram. This may not be a bad thing though since we 5611 * will recover once we get our cum-ack above and all this stuff we 5612 * dumped recovered. 5613 */ 5614} 5615 5616void 5617sctp_drain() 5618{ 5619 /* 5620 * We must walk the PCB lists for ALL associations here. The system 5621 * is LOW on MBUF's and needs help. This is where reneging will 5622 * occur. We really hope this does NOT happen! 5623 */ 5624 struct sctp_inpcb *inp; 5625 struct sctp_tcb *stcb; 5626 5627 SCTP_INP_INFO_RLOCK(); 5628 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 5629 /* For each endpoint */ 5630 SCTP_INP_RLOCK(inp); 5631 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5632 /* For each association */ 5633 SCTP_TCB_LOCK(stcb); 5634 sctp_drain_mbufs(inp, stcb); 5635 SCTP_TCB_UNLOCK(stcb); 5636 } 5637 SCTP_INP_RUNLOCK(inp); 5638 } 5639 SCTP_INP_INFO_RUNLOCK(); 5640} 5641 5642/* 5643 * start a new iterator 5644 * iterates through all endpoints and associations based on the pcb_state 5645 * flags and asoc_state. "af" (mandatory) is executed for all matching 5646 * assocs and "ef" (optional) is executed when the iterator completes. 5647 * "inpf" (optional) is executed for each new endpoint as it is being 5648 * iterated through. inpe (optional) is called when the inp completes 5649 * its way through all the stcbs. 5650 */ 5651int 5652sctp_initiate_iterator(inp_func inpf, 5653 asoc_func af, 5654 inp_func inpe, 5655 uint32_t pcb_state, 5656 uint32_t pcb_features, 5657 uint32_t asoc_state, 5658 void *argp, 5659 uint32_t argi, 5660 end_func ef, 5661 struct sctp_inpcb *s_inp, 5662 uint8_t chunk_output_off) 5663{ 5664 struct sctp_iterator *it = NULL; 5665 5666 if (af == NULL) { 5667 return (-1); 5668 } 5669 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 5670 SCTP_M_ITER); 5671 if (it == NULL) { 5672 return (ENOMEM); 5673 } 5674 memset(it, 0, sizeof(*it)); 5675 it->function_assoc = af; 5676 it->function_inp = inpf; 5677 if (inpf) 5678 it->done_current_ep = 0; 5679 else 5680 it->done_current_ep = 1; 5681 it->function_atend = ef; 5682 it->pointer = argp; 5683 it->val = argi; 5684 it->pcb_flags = pcb_state; 5685 it->pcb_features = pcb_features; 5686 it->asoc_state = asoc_state; 5687 it->function_inp_end = inpe; 5688 it->no_chunk_output = chunk_output_off; 5689 if (s_inp) { 5690 it->inp = s_inp; 5691 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 5692 } else { 5693 SCTP_INP_INFO_RLOCK(); 5694 it->inp = LIST_FIRST(&sctppcbinfo.listhead); 5695 5696 SCTP_INP_INFO_RUNLOCK(); 5697 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 5698 5699 } 5700 SCTP_IPI_ITERATOR_WQ_LOCK(); 5701 if (it->inp) { 5702 SCTP_INP_INCR_REF(it->inp); 5703 } 5704 TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr); 5705#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 5706 if (sctppcbinfo.iterator_running == 0) { 5707 sctp_wakeup_iterator(); 5708 } 5709 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5710#else 5711 if (it->inp) 5712 SCTP_INP_DECR_REF(it->inp); 5713 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5714 /* Init the timer */ 5715 SCTP_OS_TIMER_INIT(&it->tmr.timer); 5716 /* add to the list of all iterators */ 5717 sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it, 5718 NULL, NULL); 5719#endif 5720 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 5721 return (0); 5722} 5723