sctp_pcb.c revision 171158
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 171158 2007-07-02 19:22:22Z 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 FAST_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 /* FAST_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 /* number of streams to pre-open on a association */ 1915 m->pre_open_stream_count = sctp_nr_outgoing_streams_default; 1916 1917 /* Add adaptation cookie */ 1918 m->adaptation_layer_indicator = 0x504C5253; 1919 1920 /* seed random number generator */ 1921 m->random_counter = 1; 1922 m->store_at = SCTP_SIGNATURE_SIZE; 1923 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 1924 sctp_fill_random_store(m); 1925 1926 /* Minimum cookie size */ 1927 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 1928 sizeof(struct sctp_state_cookie); 1929 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 1930 1931 /* Setup the initial secret */ 1932 (void)SCTP_GETTIME_TIMEVAL(&time); 1933 m->time_of_secret_change = time.tv_sec; 1934 1935 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 1936 m->secret_key[0][i] = sctp_select_initial_TSN(m); 1937 } 1938 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 1939 1940 /* How long is a cookie good for ? */ 1941 m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default); 1942 /* 1943 * Initialize authentication parameters 1944 */ 1945 m->local_hmacs = sctp_default_supported_hmaclist(); 1946 m->local_auth_chunks = sctp_alloc_chunklist(); 1947 sctp_auth_set_default_chunks(m->local_auth_chunks); 1948 LIST_INIT(&m->shared_keys); 1949 /* add default NULL key as key id 0 */ 1950 null_key = sctp_alloc_sharedkey(); 1951 sctp_insert_sharedkey(&m->shared_keys, null_key); 1952 SCTP_INP_WUNLOCK(inp); 1953#ifdef SCTP_LOG_CLOSING 1954 sctp_log_closing(inp, NULL, 12); 1955#endif 1956 return (error); 1957} 1958 1959 1960void 1961sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 1962 struct sctp_tcb *stcb) 1963{ 1964 struct sctp_nets *net; 1965 uint16_t lport, rport; 1966 struct sctppcbhead *head; 1967 struct sctp_laddr *laddr, *oladdr; 1968 1969 SCTP_TCB_UNLOCK(stcb); 1970 SCTP_INP_INFO_WLOCK(); 1971 SCTP_INP_WLOCK(old_inp); 1972 SCTP_INP_WLOCK(new_inp); 1973 SCTP_TCB_LOCK(stcb); 1974 1975 new_inp->sctp_ep.time_of_secret_change = 1976 old_inp->sctp_ep.time_of_secret_change; 1977 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 1978 sizeof(old_inp->sctp_ep.secret_key)); 1979 new_inp->sctp_ep.current_secret_number = 1980 old_inp->sctp_ep.current_secret_number; 1981 new_inp->sctp_ep.last_secret_number = 1982 old_inp->sctp_ep.last_secret_number; 1983 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 1984 1985 /* make it so new data pours into the new socket */ 1986 stcb->sctp_socket = new_inp->sctp_socket; 1987 stcb->sctp_ep = new_inp; 1988 1989 /* Copy the port across */ 1990 lport = new_inp->sctp_lport = old_inp->sctp_lport; 1991 rport = stcb->rport; 1992 /* Pull the tcb from the old association */ 1993 LIST_REMOVE(stcb, sctp_tcbhash); 1994 LIST_REMOVE(stcb, sctp_tcblist); 1995 1996 /* Now insert the new_inp into the TCP connected hash */ 1997 head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport), 1998 sctppcbinfo.hashtcpmark)]; 1999 2000 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2001 /* Its safe to access */ 2002 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2003 2004 /* Now move the tcb into the endpoint list */ 2005 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2006 /* 2007 * Question, do we even need to worry about the ep-hash since we 2008 * only have one connection? Probably not :> so lets get rid of it 2009 * and not suck up any kernel memory in that. 2010 */ 2011 2012 /* Ok. Let's restart timer. */ 2013 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2014 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2015 stcb, net); 2016 } 2017 2018 SCTP_INP_INFO_WUNLOCK(); 2019 if (new_inp->sctp_tcbhash != NULL) { 2020 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2021 new_inp->sctp_tcbhash = NULL; 2022 } 2023 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2024 /* Subset bound, so copy in the laddr list from the old_inp */ 2025 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2026 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 2027 if (laddr == NULL) { 2028 /* 2029 * Gak, what can we do? This assoc is really 2030 * HOSED. We probably should send an abort 2031 * here. 2032 */ 2033 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2034 continue; 2035 } 2036 SCTP_INCR_LADDR_COUNT(); 2037 bzero(laddr, sizeof(*laddr)); 2038 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2039 laddr->ifa = oladdr->ifa; 2040 atomic_add_int(&laddr->ifa->refcount, 1); 2041 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2042 sctp_nxt_addr); 2043 new_inp->laddr_count++; 2044 } 2045 } 2046 /* 2047 * Now any running timers need to be adjusted since we really don't 2048 * care if they are running or not just blast in the new_inp into 2049 * all of them. 2050 */ 2051 2052 stcb->asoc.hb_timer.ep = (void *)new_inp; 2053 stcb->asoc.dack_timer.ep = (void *)new_inp; 2054 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2055 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2056 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2057 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2058 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2059 /* now what about the nets? */ 2060 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2061 net->pmtu_timer.ep = (void *)new_inp; 2062 net->rxt_timer.ep = (void *)new_inp; 2063 net->fr_timer.ep = (void *)new_inp; 2064 } 2065 SCTP_INP_WUNLOCK(new_inp); 2066 SCTP_INP_WUNLOCK(old_inp); 2067} 2068 2069static int 2070sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 2071{ 2072 struct sctppcbhead *head; 2073 struct sctp_inpcb *t_inp; 2074 int fnd; 2075 2076 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 2077 sctppcbinfo.hashmark)]; 2078 LIST_FOREACH(t_inp, head, sctp_hash) { 2079 if (t_inp->sctp_lport != lport) { 2080 continue; 2081 } 2082 /* is it in the VRF in question */ 2083 fnd = 0; 2084 if (t_inp->def_vrf_id == vrf_id) 2085 fnd = 1; 2086 if (!fnd) 2087 continue; 2088 2089 /* This one is in use. */ 2090 /* check the v6/v4 binding issue */ 2091 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2092 SCTP_IPV6_V6ONLY(t_inp)) { 2093 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2094 /* collision in V6 space */ 2095 return (1); 2096 } else { 2097 /* inp is BOUND_V4 no conflict */ 2098 continue; 2099 } 2100 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2101 /* t_inp is bound v4 and v6, conflict always */ 2102 return (1); 2103 } else { 2104 /* t_inp is bound only V4 */ 2105 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2106 SCTP_IPV6_V6ONLY(inp)) { 2107 /* no conflict */ 2108 continue; 2109 } 2110 /* else fall through to conflict */ 2111 } 2112 return (1); 2113 } 2114 return (0); 2115} 2116 2117 2118 2119int 2120sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2121 struct sctp_ifa *sctp_ifap, struct thread *p) 2122{ 2123 /* bind a ep to a socket address */ 2124 struct sctppcbhead *head; 2125 struct sctp_inpcb *inp, *inp_tmp; 2126 struct inpcb *ip_inp; 2127 int bindall; 2128 uint16_t lport; 2129 int error; 2130 uint32_t vrf_id; 2131 2132 lport = 0; 2133 error = 0; 2134 bindall = 1; 2135 inp = (struct sctp_inpcb *)so->so_pcb; 2136 ip_inp = (struct inpcb *)so->so_pcb; 2137#ifdef SCTP_DEBUG 2138 if (addr) { 2139 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2140 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2141 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2142 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2143 } 2144#endif 2145 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2146 /* already did a bind, subsequent binds NOT allowed ! */ 2147 return (EINVAL); 2148 } 2149 if (addr != NULL) { 2150 if (addr->sa_family == AF_INET) { 2151 struct sockaddr_in *sin; 2152 2153 /* IPV6_V6ONLY socket? */ 2154 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2155 return (EINVAL); 2156 } 2157 if (addr->sa_len != sizeof(*sin)) 2158 return (EINVAL); 2159 2160 sin = (struct sockaddr_in *)addr; 2161 lport = sin->sin_port; 2162 2163 if (sin->sin_addr.s_addr != INADDR_ANY) { 2164 bindall = 0; 2165 } 2166 } else if (addr->sa_family == AF_INET6) { 2167 /* Only for pure IPv6 Address. (No IPv4 Mapped!) */ 2168 struct sockaddr_in6 *sin6; 2169 2170 sin6 = (struct sockaddr_in6 *)addr; 2171 2172 if (addr->sa_len != sizeof(*sin6)) 2173 return (EINVAL); 2174 2175 lport = sin6->sin6_port; 2176 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2177 bindall = 0; 2178 /* KAME hack: embed scopeid */ 2179 if (sa6_embedscope(sin6, ip6_use_defzone) != 0) 2180 return (EINVAL); 2181 } 2182 /* this must be cleared for ifa_ifwithaddr() */ 2183 sin6->sin6_scope_id = 0; 2184 } else { 2185 return (EAFNOSUPPORT); 2186 } 2187 } 2188 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2189 vrf_id = inp->def_vrf_id; 2190 2191 SCTP_INP_INFO_WLOCK(); 2192 SCTP_INP_WLOCK(inp); 2193 /* increase our count due to the unlock we do */ 2194 SCTP_INP_INCR_REF(inp); 2195 if (lport) { 2196 /* 2197 * Did the caller specify a port? if so we must see if a ep 2198 * already has this one bound. 2199 */ 2200 /* got to be root to get at low ports */ 2201 if (ntohs(lport) < IPPORT_RESERVED) { 2202 if (p && (error = 2203 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2204 )) { 2205 SCTP_INP_DECR_REF(inp); 2206 SCTP_INP_WUNLOCK(inp); 2207 SCTP_INP_INFO_WUNLOCK(); 2208 return (error); 2209 } 2210 } 2211 if (p == NULL) { 2212 SCTP_INP_DECR_REF(inp); 2213 SCTP_INP_WUNLOCK(inp); 2214 SCTP_INP_INFO_WUNLOCK(); 2215 return (error); 2216 } 2217 SCTP_INP_WUNLOCK(inp); 2218 if (bindall) { 2219 vrf_id = inp->def_vrf_id; 2220 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2221 if (inp_tmp != NULL) { 2222 /* 2223 * lock guy returned and lower count note 2224 * that we are not bound so inp_tmp should 2225 * NEVER be inp. And it is this inp 2226 * (inp_tmp) that gets the reference bump, 2227 * so we must lower it. 2228 */ 2229 SCTP_INP_DECR_REF(inp_tmp); 2230 SCTP_INP_DECR_REF(inp); 2231 /* unlock info */ 2232 SCTP_INP_INFO_WUNLOCK(); 2233 return (EADDRINUSE); 2234 } 2235 } else { 2236 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2237 if (inp_tmp != NULL) { 2238 /* 2239 * lock guy returned and lower count note 2240 * that we are not bound so inp_tmp should 2241 * NEVER be inp. And it is this inp 2242 * (inp_tmp) that gets the reference bump, 2243 * so we must lower it. 2244 */ 2245 SCTP_INP_DECR_REF(inp_tmp); 2246 SCTP_INP_DECR_REF(inp); 2247 /* unlock info */ 2248 SCTP_INP_INFO_WUNLOCK(); 2249 return (EADDRINUSE); 2250 } 2251 } 2252 SCTP_INP_WLOCK(inp); 2253 if (bindall) { 2254 /* verify that no lport is not used by a singleton */ 2255 if (sctp_isport_inuse(inp, lport, vrf_id)) { 2256 /* Sorry someone already has this one bound */ 2257 SCTP_INP_DECR_REF(inp); 2258 SCTP_INP_WUNLOCK(inp); 2259 SCTP_INP_INFO_WUNLOCK(); 2260 return (EADDRINUSE); 2261 } 2262 } 2263 } else { 2264 uint16_t first, last, candidate; 2265 uint16_t count; 2266 int done; 2267 2268 if (ip_inp->inp_flags & INP_HIGHPORT) { 2269 first = ipport_hifirstauto; 2270 last = ipport_hilastauto; 2271 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2272 if (p && (error = 2273 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2274 )) { 2275 SCTP_INP_DECR_REF(inp); 2276 SCTP_INP_WUNLOCK(inp); 2277 SCTP_INP_INFO_WUNLOCK(); 2278 return (error); 2279 } 2280 first = ipport_lowfirstauto; 2281 last = ipport_lowlastauto; 2282 } else { 2283 first = ipport_firstauto; 2284 last = ipport_lastauto; 2285 } 2286 if (first > last) { 2287 uint16_t temp; 2288 2289 temp = first; 2290 first = last; 2291 last = temp; 2292 } 2293 count = last - first + 1; /* number of candidates */ 2294 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2295 2296 done = 0; 2297 while (!done) { 2298 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) { 2299 done = 1; 2300 } 2301 if (!done) { 2302 if (--count == 0) { 2303 SCTP_INP_DECR_REF(inp); 2304 SCTP_INP_WUNLOCK(inp); 2305 SCTP_INP_INFO_WUNLOCK(); 2306 return (EADDRINUSE); 2307 } 2308 if (candidate == last) 2309 candidate = first; 2310 else 2311 candidate = candidate + 1; 2312 } 2313 } 2314 lport = htons(candidate); 2315 } 2316 SCTP_INP_DECR_REF(inp); 2317 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2318 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2319 /* 2320 * this really should not happen. The guy did a non-blocking 2321 * bind and then did a close at the same time. 2322 */ 2323 SCTP_INP_WUNLOCK(inp); 2324 SCTP_INP_INFO_WUNLOCK(); 2325 return (EINVAL); 2326 } 2327 /* ok we look clear to give out this port, so lets setup the binding */ 2328 if (bindall) { 2329 /* binding to all addresses, so just set in the proper flags */ 2330 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2331 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2332 /* set the automatic addr changes from kernel flag */ 2333 if (sctp_auto_asconf == 0) { 2334 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2335 } else { 2336 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2337 } 2338 } else { 2339 /* 2340 * bind specific, make sure flags is off and add a new 2341 * address structure to the sctp_addr_list inside the ep 2342 * structure. 2343 * 2344 * We will need to allocate one and insert it at the head. The 2345 * socketopt call can just insert new addresses in there as 2346 * well. It will also have to do the embed scope kame hack 2347 * too (before adding). 2348 */ 2349 struct sctp_ifa *ifa; 2350 struct sockaddr_storage store_sa; 2351 2352 memset(&store_sa, 0, sizeof(store_sa)); 2353 if (addr->sa_family == AF_INET) { 2354 struct sockaddr_in *sin; 2355 2356 sin = (struct sockaddr_in *)&store_sa; 2357 memcpy(sin, addr, sizeof(struct sockaddr_in)); 2358 sin->sin_port = 0; 2359 } else if (addr->sa_family == AF_INET6) { 2360 struct sockaddr_in6 *sin6; 2361 2362 sin6 = (struct sockaddr_in6 *)&store_sa; 2363 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 2364 sin6->sin6_port = 0; 2365 } 2366 /* 2367 * first find the interface with the bound address need to 2368 * zero out the port to find the address! yuck! can't do 2369 * this earlier since need port for sctp_pcb_findep() 2370 */ 2371 if (sctp_ifap) 2372 ifa = sctp_ifap; 2373 else 2374 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 2375 vrf_id, 0); 2376 if (ifa == NULL) { 2377 /* Can't find an interface with that address */ 2378 SCTP_INP_WUNLOCK(inp); 2379 SCTP_INP_INFO_WUNLOCK(); 2380 return (EADDRNOTAVAIL); 2381 } 2382 if (addr->sa_family == AF_INET6) { 2383 /* GAK, more FIXME IFA lock? */ 2384 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2385 /* Can't bind a non-existent addr. */ 2386 SCTP_INP_WUNLOCK(inp); 2387 SCTP_INP_INFO_WUNLOCK(); 2388 return (EINVAL); 2389 } 2390 } 2391 /* we're not bound all */ 2392 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 2393 /* allow bindx() to send ASCONF's for binding changes */ 2394 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2395 /* clear automatic addr changes from kernel flag */ 2396 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2397 2398 /* add this address to the endpoint list */ 2399 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 2400 if (error != 0) { 2401 SCTP_INP_WUNLOCK(inp); 2402 SCTP_INP_INFO_WUNLOCK(); 2403 return (error); 2404 } 2405 inp->laddr_count++; 2406 } 2407 /* find the bucket */ 2408 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 2409 sctppcbinfo.hashmark)]; 2410 /* put it in the bucket */ 2411 LIST_INSERT_HEAD(head, inp, sctp_hash); 2412 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n", 2413 head, ntohs(lport)); 2414 /* set in the port */ 2415 inp->sctp_lport = lport; 2416 2417 /* turn off just the unbound flag */ 2418 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2419 SCTP_INP_WUNLOCK(inp); 2420 SCTP_INP_INFO_WUNLOCK(); 2421 return (0); 2422} 2423 2424 2425static void 2426sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next) 2427{ 2428 struct sctp_iterator *it; 2429 2430 /* 2431 * We enter with the only the ITERATOR_LOCK in place and a write 2432 * lock on the inp_info stuff. 2433 */ 2434 2435 /* 2436 * Go through all iterators, we must do this since it is possible 2437 * that some iterator does NOT have the lock, but is waiting for it. 2438 * And the one that had the lock has either moved in the last 2439 * iteration or we just cleared it above. We need to find all of 2440 * those guys. The list of iterators should never be very big 2441 * though. 2442 */ 2443 TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) { 2444 if (it == inp->inp_starting_point_for_iterator) 2445 /* skip this guy, he's special */ 2446 continue; 2447 if (it->inp == inp) { 2448 /* 2449 * This is tricky and we DON'T lock the iterator. 2450 * Reason is he's running but waiting for me since 2451 * inp->inp_starting_point_for_iterator has the lock 2452 * on me (the guy above we skipped). This tells us 2453 * its is not running but waiting for 2454 * inp->inp_starting_point_for_iterator to be 2455 * released by the guy that does have our INP in a 2456 * lock. 2457 */ 2458 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 2459 it->inp = NULL; 2460 it->stcb = NULL; 2461 } else { 2462 /* set him up to do the next guy not me */ 2463 it->inp = inp_next; 2464 it->stcb = NULL; 2465 } 2466 } 2467 } 2468 it = inp->inp_starting_point_for_iterator; 2469 if (it) { 2470 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 2471 it->inp = NULL; 2472 } else { 2473 it->inp = inp_next; 2474 } 2475 it->stcb = NULL; 2476 } 2477} 2478 2479/* release sctp_inpcb unbind the port */ 2480void 2481sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 2482{ 2483 /* 2484 * Here we free a endpoint. We must find it (if it is in the Hash 2485 * table) and remove it from there. Then we must also find it in the 2486 * overall list and remove it from there. After all removals are 2487 * complete then any timer has to be stopped. Then start the actual 2488 * freeing. a) Any local lists. b) Any associations. c) The hash of 2489 * all associations. d) finally the ep itself. 2490 */ 2491 struct sctp_pcb *m; 2492 struct sctp_inpcb *inp_save; 2493 struct sctp_tcb *asoc, *nasoc; 2494 struct sctp_laddr *laddr, *nladdr; 2495 struct inpcb *ip_pcb; 2496 struct socket *so; 2497 2498 struct sctp_queued_to_read *sq; 2499 2500 2501 int cnt; 2502 sctp_sharedkey_t *shared_key; 2503 2504 2505#ifdef SCTP_LOG_CLOSING 2506 sctp_log_closing(inp, NULL, 0); 2507#endif 2508 2509 SCTP_ITERATOR_LOCK(); 2510 so = inp->sctp_socket; 2511 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2512 /* been here before.. eeks.. get out of here */ 2513 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 2514 SCTP_ITERATOR_UNLOCK(); 2515#ifdef SCTP_LOG_CLOSING 2516 sctp_log_closing(inp, NULL, 1); 2517#endif 2518 return; 2519 } 2520 SCTP_ASOC_CREATE_LOCK(inp); 2521 SCTP_INP_INFO_WLOCK(); 2522 2523 SCTP_INP_WLOCK(inp); 2524 /* First time through we have the socket lock, after that no more. */ 2525 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 2526 /* 2527 * Once we are in we can remove the flag from = 1 is only 2528 * passed from the actual closing routines that are called 2529 * via the sockets layer. 2530 */ 2531 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 2532 } 2533 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 2534 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 2535 2536 if (inp->control) { 2537 sctp_m_freem(inp->control); 2538 inp->control = NULL; 2539 } 2540 if (inp->pkt) { 2541 sctp_m_freem(inp->pkt); 2542 inp->pkt = NULL; 2543 } 2544 m = &inp->sctp_ep; 2545 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 2546 * here but I will be nice :> (i.e. 2547 * ip_pcb = ep;) */ 2548 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 2549 int cnt_in_sd; 2550 2551 cnt_in_sd = 0; 2552 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 2553 asoc = nasoc) { 2554 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2555 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2556 /* Skip guys being freed */ 2557 asoc->sctp_socket = NULL; 2558 cnt_in_sd++; 2559 continue; 2560 } 2561 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 2562 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 2563 /* 2564 * If we have data in queue, we don't want 2565 * to just free since the app may have done, 2566 * send()/close or connect/send/close. And 2567 * it wants the data to get across first. 2568 */ 2569 if (asoc->asoc.total_output_queue_size == 0) { 2570 /* 2571 * Just abandon things in the front 2572 * states 2573 */ 2574 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2); 2575 continue; 2576 } 2577 } 2578 SCTP_TCB_LOCK(asoc); 2579 /* Disconnect the socket please */ 2580 asoc->sctp_socket = NULL; 2581 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 2582 if ((asoc->asoc.size_on_reasm_queue > 0) || 2583 (asoc->asoc.control_pdapi) || 2584 (asoc->asoc.size_on_all_streams > 0) || 2585 (so && (so->so_rcv.sb_cc > 0)) 2586 ) { 2587 /* Left with Data unread */ 2588 struct mbuf *op_err; 2589 2590 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2591 0, M_DONTWAIT, 1, MT_DATA); 2592 if (op_err) { 2593 /* Fill in the user initiated abort */ 2594 struct sctp_paramhdr *ph; 2595 uint32_t *ippp; 2596 2597 SCTP_BUF_LEN(op_err) = 2598 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 2599 ph = mtod(op_err, 2600 struct sctp_paramhdr *); 2601 ph->param_type = htons( 2602 SCTP_CAUSE_USER_INITIATED_ABT); 2603 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2604 ippp = (uint32_t *) (ph + 1); 2605 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 2606 } 2607 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 2608 sctp_send_abort_tcb(asoc, op_err); 2609 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2610 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2611 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2612 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2613 } 2614 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4); 2615 continue; 2616 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 2617 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 2618 (asoc->asoc.stream_queue_cnt == 0) 2619 ) { 2620 if (asoc->asoc.locked_on_sending) { 2621 goto abort_anyway; 2622 } 2623 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 2624 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 2625 /* 2626 * there is nothing queued to send, 2627 * so I send shutdown 2628 */ 2629 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 2630 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2631 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2632 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2633 } 2634 asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT; 2635 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 2636 asoc->asoc.primary_destination); 2637 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 2638 asoc->asoc.primary_destination); 2639 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR); 2640 } 2641 } else { 2642 /* mark into shutdown pending */ 2643 struct sctp_stream_queue_pending *sp; 2644 2645 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 2646 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 2647 asoc->asoc.primary_destination); 2648 if (asoc->asoc.locked_on_sending) { 2649 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 2650 sctp_streamhead); 2651 if (sp == NULL) { 2652 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 2653 asoc->asoc.locked_on_sending, 2654 asoc->asoc.locked_on_sending->stream_no); 2655 } else { 2656 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 2657 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 2658 } 2659 } 2660 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 2661 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 2662 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 2663 struct mbuf *op_err; 2664 2665 abort_anyway: 2666 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2667 0, M_DONTWAIT, 1, MT_DATA); 2668 if (op_err) { 2669 /* 2670 * Fill in the user 2671 * initiated abort 2672 */ 2673 struct sctp_paramhdr *ph; 2674 uint32_t *ippp; 2675 2676 SCTP_BUF_LEN(op_err) = 2677 (sizeof(struct sctp_paramhdr) + 2678 sizeof(uint32_t)); 2679 ph = mtod(op_err, 2680 struct sctp_paramhdr *); 2681 ph->param_type = htons( 2682 SCTP_CAUSE_USER_INITIATED_ABT); 2683 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2684 ippp = (uint32_t *) (ph + 1); 2685 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 2686 } 2687 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 2688 sctp_send_abort_tcb(asoc, op_err); 2689 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2690 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2691 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2692 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2693 } 2694 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6); 2695 continue; 2696 } 2697 } 2698 cnt_in_sd++; 2699 SCTP_TCB_UNLOCK(asoc); 2700 } 2701 /* now is there some left in our SHUTDOWN state? */ 2702 if (cnt_in_sd) { 2703 SCTP_INP_WUNLOCK(inp); 2704 SCTP_ASOC_CREATE_UNLOCK(inp); 2705 SCTP_INP_INFO_WUNLOCK(); 2706 SCTP_ITERATOR_UNLOCK(); 2707#ifdef SCTP_LOG_CLOSING 2708 sctp_log_closing(inp, NULL, 2); 2709#endif 2710 return; 2711 } 2712 } 2713 inp->sctp_socket = NULL; 2714 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 2715 SCTP_PCB_FLAGS_UNBOUND) { 2716 /* 2717 * ok, this guy has been bound. It's port is somewhere in 2718 * the sctppcbinfo hash table. Remove it! 2719 */ 2720 LIST_REMOVE(inp, sctp_hash); 2721 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 2722 } 2723 /* 2724 * If there is a timer running to kill us, forget it, since it may 2725 * have a contest on the INP lock.. which would cause us to die ... 2726 */ 2727 cnt = 0; 2728 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 2729 asoc = nasoc) { 2730 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2731 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2732 cnt++; 2733 continue; 2734 } 2735 /* Free associations that are NOT killing us */ 2736 SCTP_TCB_LOCK(asoc); 2737 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 2738 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 2739 struct mbuf *op_err; 2740 uint32_t *ippp; 2741 2742 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2743 0, M_DONTWAIT, 1, MT_DATA); 2744 if (op_err) { 2745 /* Fill in the user initiated abort */ 2746 struct sctp_paramhdr *ph; 2747 2748 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 2749 sizeof(uint32_t)); 2750 ph = mtod(op_err, struct sctp_paramhdr *); 2751 ph->param_type = htons( 2752 SCTP_CAUSE_USER_INITIATED_ABT); 2753 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2754 ippp = (uint32_t *) (ph + 1); 2755 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 2756 2757 } 2758 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 2759 sctp_send_abort_tcb(asoc, op_err); 2760 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2761 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2762 cnt++; 2763 SCTP_TCB_UNLOCK(asoc); 2764 continue; 2765 } 2766 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2767 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2768 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2769 } 2770 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8); 2771 } 2772 if (cnt) { 2773 /* Ok we have someone out there that will kill us */ 2774 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2775 SCTP_INP_WUNLOCK(inp); 2776 SCTP_ASOC_CREATE_UNLOCK(inp); 2777 SCTP_INP_INFO_WUNLOCK(); 2778 SCTP_ITERATOR_UNLOCK(); 2779#ifdef SCTP_LOG_CLOSING 2780 sctp_log_closing(inp, NULL, 3); 2781#endif 2782 return; 2783 } 2784 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 2785 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2786 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 2787 SCTP_INP_WUNLOCK(inp); 2788 SCTP_ASOC_CREATE_UNLOCK(inp); 2789 SCTP_INP_INFO_WUNLOCK(); 2790 SCTP_ITERATOR_UNLOCK(); 2791#ifdef SCTP_LOG_CLOSING 2792 sctp_log_closing(inp, NULL, 4); 2793#endif 2794 return; 2795 } 2796 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2797 inp->sctp_ep.signature_change.type = 0; 2798 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 2799 2800#ifdef SCTP_LOG_CLOSING 2801 sctp_log_closing(inp, NULL, 5); 2802#endif 2803 2804 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2805 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE; 2806 /* Clear the read queue */ 2807 /* sa_ignore FREED_MEMORY */ 2808 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { 2809 /* Its only abandoned if it had data left */ 2810 if (sq->length) 2811 SCTP_STAT_INCR(sctps_left_abandon); 2812 2813 TAILQ_REMOVE(&inp->read_queue, sq, next); 2814 sctp_free_remote_addr(sq->whoFrom); 2815 if (so) 2816 so->so_rcv.sb_cc -= sq->length; 2817 if (sq->data) { 2818 sctp_m_freem(sq->data); 2819 sq->data = NULL; 2820 } 2821 /* 2822 * no need to free the net count, since at this point all 2823 * assoc's are gone. 2824 */ 2825 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); 2826 SCTP_DECR_READQ_COUNT(); 2827 } 2828 /* Now the sctp_pcb things */ 2829 /* 2830 * free each asoc if it is not already closed/free. we can't use the 2831 * macro here since le_next will get freed as part of the 2832 * sctp_free_assoc() call. 2833 */ 2834 cnt = 0; 2835 if (so) { 2836#ifdef FAST_IPSEC 2837 ipsec4_delete_pcbpolicy(ip_pcb); 2838#endif /* FAST_IPSEC */ 2839 2840 /* Unlocks not needed since the socket is gone now */ 2841 } 2842 if (ip_pcb->inp_options) { 2843 (void)sctp_m_free(ip_pcb->inp_options); 2844 ip_pcb->inp_options = 0; 2845 } 2846 if (ip_pcb->inp_moptions) { 2847 inp_freemoptions(ip_pcb->inp_moptions); 2848 ip_pcb->inp_moptions = 0; 2849 } 2850#ifdef INET6 2851 if (ip_pcb->inp_vflag & INP_IPV6) { 2852 struct in6pcb *in6p; 2853 2854 in6p = (struct in6pcb *)inp; 2855 ip6_freepcbopts(in6p->in6p_outputopts); 2856 } 2857#endif /* INET6 */ 2858 ip_pcb->inp_vflag = 0; 2859 /* free up authentication fields */ 2860 if (inp->sctp_ep.local_auth_chunks != NULL) 2861 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 2862 if (inp->sctp_ep.local_hmacs != NULL) 2863 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 2864 2865 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 2866 while (shared_key) { 2867 LIST_REMOVE(shared_key, next); 2868 sctp_free_sharedkey(shared_key); 2869 /* sa_ignore FREED_MEMORY */ 2870 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 2871 } 2872 2873 inp_save = LIST_NEXT(inp, sctp_list); 2874 LIST_REMOVE(inp, sctp_list); 2875 2876 /* fix any iterators only after out of the list */ 2877 sctp_iterator_inp_being_freed(inp, inp_save); 2878 /* 2879 * if we have an address list the following will free the list of 2880 * ifaddr's that are set into this ep. Again macro limitations here, 2881 * since the LIST_FOREACH could be a bad idea. 2882 */ 2883 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; 2884 laddr = nladdr) { 2885 nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 2886 sctp_remove_laddr(laddr); 2887 } 2888 2889#ifdef SCTP_TRACK_FREED_ASOCS 2890 /* TEMP CODE */ 2891 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; 2892 asoc = nasoc) { 2893 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2894 LIST_REMOVE(asoc, sctp_tcblist); 2895 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc); 2896 SCTP_DECR_ASOC_COUNT(); 2897 } 2898 /* *** END TEMP CODE *** */ 2899#endif 2900 /* Now lets see about freeing the EP hash table. */ 2901 if (inp->sctp_tcbhash != NULL) { 2902 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 2903 inp->sctp_tcbhash = NULL; 2904 } 2905 /* Now we must put the ep memory back into the zone pool */ 2906 INP_LOCK_DESTROY(&inp->ip_inp.inp); 2907 SCTP_INP_LOCK_DESTROY(inp); 2908 SCTP_INP_READ_DESTROY(inp); 2909 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 2910 SCTP_INP_INFO_WUNLOCK(); 2911 2912 SCTP_ITERATOR_UNLOCK(); 2913 2914 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 2915 SCTP_DECR_EP_COUNT(); 2916 2917} 2918 2919 2920struct sctp_nets * 2921sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 2922{ 2923 struct sctp_nets *net; 2924 2925 /* locate the address */ 2926 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2927 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 2928 return (net); 2929 } 2930 return (NULL); 2931} 2932 2933 2934int 2935sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 2936{ 2937 struct sctp_ifa *sctp_ifa; 2938 2939 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0); 2940 if (sctp_ifa) { 2941 return (1); 2942 } else { 2943 return (0); 2944 } 2945} 2946 2947void 2948sctp_set_initial_cc_param(struct sctp_tcb *stcb, struct sctp_nets *net) 2949{ 2950 net->cwnd = min((net->mtu * 4), max((2 * net->mtu), SCTP_INITIAL_CWND)); 2951 /* we always get at LEAST 2 MTU's */ 2952 if (net->cwnd < (2 * net->mtu)) { 2953 net->cwnd = 2 * net->mtu; 2954 } 2955 net->ssthresh = stcb->asoc.peers_rwnd; 2956} 2957 2958 2959 2960/* 2961 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 2962 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 2963 * stats of stuff. 2964 */ 2965int 2966sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 2967 int set_scope, int from) 2968{ 2969 /* 2970 * The following is redundant to the same lines in the 2971 * sctp_aloc_assoc() but is needed since other's call the add 2972 * address function 2973 */ 2974 struct sctp_nets *net, *netfirst; 2975 int addr_inscope; 2976 2977 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 2978 from); 2979 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 2980 2981 netfirst = sctp_findnet(stcb, newaddr); 2982 if (netfirst) { 2983 /* 2984 * Lie and return ok, we don't want to make the association 2985 * go away for this behavior. It will happen in the TCP 2986 * model in a connected socket. It does not reach the hash 2987 * table until after the association is built so it can't be 2988 * found. Mark as reachable, since the initial creation will 2989 * have been cleared and the NOT_IN_ASSOC flag will have 2990 * been added... and we don't want to end up removing it 2991 * back out. 2992 */ 2993 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 2994 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 2995 SCTP_ADDR_UNCONFIRMED); 2996 } else { 2997 netfirst->dest_state = SCTP_ADDR_REACHABLE; 2998 } 2999 3000 return (0); 3001 } 3002 addr_inscope = 1; 3003 if (newaddr->sa_family == AF_INET) { 3004 struct sockaddr_in *sin; 3005 3006 sin = (struct sockaddr_in *)newaddr; 3007 if (sin->sin_addr.s_addr == 0) { 3008 /* Invalid address */ 3009 return (-1); 3010 } 3011 /* zero out the bzero area */ 3012 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3013 3014 /* assure len is set */ 3015 sin->sin_len = sizeof(struct sockaddr_in); 3016 if (set_scope) { 3017#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3018 stcb->ipv4_local_scope = 1; 3019#else 3020 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3021 stcb->asoc.ipv4_local_scope = 1; 3022 } 3023#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3024 } else { 3025 /* Validate the address is in scope */ 3026 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3027 (stcb->asoc.ipv4_local_scope == 0)) { 3028 addr_inscope = 0; 3029 } 3030 } 3031 } else if (newaddr->sa_family == AF_INET6) { 3032 struct sockaddr_in6 *sin6; 3033 3034 sin6 = (struct sockaddr_in6 *)newaddr; 3035 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3036 /* Invalid address */ 3037 return (-1); 3038 } 3039 /* assure len is set */ 3040 sin6->sin6_len = sizeof(struct sockaddr_in6); 3041 if (set_scope) { 3042 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3043 stcb->asoc.loopback_scope = 1; 3044 stcb->asoc.local_scope = 0; 3045 stcb->asoc.ipv4_local_scope = 1; 3046 stcb->asoc.site_scope = 1; 3047 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3048 /* 3049 * If the new destination is a LINK_LOCAL we 3050 * must have common site scope. Don't set 3051 * the local scope since we may not share 3052 * all links, only loopback can do this. 3053 * Links on the local network would also be 3054 * on our private network for v4 too. 3055 */ 3056 stcb->asoc.ipv4_local_scope = 1; 3057 stcb->asoc.site_scope = 1; 3058 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3059 /* 3060 * If the new destination is SITE_LOCAL then 3061 * we must have site scope in common. 3062 */ 3063 stcb->asoc.site_scope = 1; 3064 } 3065 } else { 3066 /* Validate the address is in scope */ 3067 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3068 (stcb->asoc.loopback_scope == 0)) { 3069 addr_inscope = 0; 3070 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3071 (stcb->asoc.local_scope == 0)) { 3072 addr_inscope = 0; 3073 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3074 (stcb->asoc.site_scope == 0)) { 3075 addr_inscope = 0; 3076 } 3077 } 3078 } else { 3079 /* not supported family type */ 3080 return (-1); 3081 } 3082 net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets); 3083 if (net == NULL) { 3084 return (-1); 3085 } 3086 SCTP_INCR_RADDR_COUNT(); 3087 bzero(net, sizeof(*net)); 3088 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3089 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3090 if (newaddr->sa_family == AF_INET) { 3091 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3092 } else if (newaddr->sa_family == AF_INET6) { 3093 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3094 } 3095 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3096 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3097 stcb->asoc.loopback_scope = 1; 3098 stcb->asoc.ipv4_local_scope = 1; 3099 stcb->asoc.local_scope = 0; 3100 stcb->asoc.site_scope = 1; 3101 addr_inscope = 1; 3102 } 3103 net->failure_threshold = stcb->asoc.def_net_failure; 3104 if (addr_inscope == 0) { 3105 net->dest_state = (SCTP_ADDR_REACHABLE | 3106 SCTP_ADDR_OUT_OF_SCOPE); 3107 } else { 3108 if (from == SCTP_ADDR_IS_CONFIRMED) 3109 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3110 net->dest_state = SCTP_ADDR_REACHABLE; 3111 else 3112 net->dest_state = SCTP_ADDR_REACHABLE | 3113 SCTP_ADDR_UNCONFIRMED; 3114 } 3115 /* 3116 * We set this to 0, the timer code knows that this means its an 3117 * initial value 3118 */ 3119 net->RTO = 0; 3120 net->RTO_measured = 0; 3121 stcb->asoc.numnets++; 3122 *(&net->ref_count) = 1; 3123 net->tos_flowlabel = 0; 3124#ifdef INET 3125 if (newaddr->sa_family == AF_INET) 3126 net->tos_flowlabel = stcb->asoc.default_tos; 3127#endif 3128#ifdef INET6 3129 if (newaddr->sa_family == AF_INET6) 3130 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3131#endif 3132 /* Init the timer structure */ 3133 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3134 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3135 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3136 3137 /* Now generate a route for this guy */ 3138 /* KAME hack: embed scopeid */ 3139 if (newaddr->sa_family == AF_INET6) { 3140 struct sockaddr_in6 *sin6; 3141 3142 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3143 (void)sa6_embedscope(sin6, ip6_use_defzone); 3144 sin6->sin6_scope_id = 0; 3145 } 3146 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3147 3148 if (newaddr->sa_family == AF_INET6) { 3149 struct sockaddr_in6 *sin6; 3150 3151 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3152 (void)sa6_recoverscope(sin6); 3153 } 3154 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3155 /* Get source address */ 3156 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3157 stcb, 3158 (sctp_route_t *) & net->ro, 3159 net, 3160 0, 3161 stcb->asoc.vrf_id); 3162 /* Now get the interface MTU */ 3163 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3164 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3165 } else { 3166 net->mtu = 0; 3167 } 3168#ifdef SCTP_PRINT_FOR_B_AND_M 3169 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu); 3170#endif 3171 if (net->mtu == 0) { 3172 /* Huh ?? */ 3173 net->mtu = SCTP_DEFAULT_MTU; 3174 } else { 3175 uint32_t rmtu; 3176 3177 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3178#ifdef SCTP_PRINT_FOR_B_AND_M 3179 SCTP_PRINTF("The route mtu is %d\n", rmtu); 3180#endif 3181 if (rmtu == 0) { 3182 /* 3183 * Start things off to match mtu of 3184 * interface please. 3185 */ 3186 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3187 net->ro.ro_rt, net->mtu); 3188 } else { 3189 /* 3190 * we take the route mtu over the interface, 3191 * since the route may be leading out the 3192 * loopback, or a different interface. 3193 */ 3194 net->mtu = rmtu; 3195 } 3196 } 3197 if (from == SCTP_ALLOC_ASOC) { 3198#ifdef SCTP_PRINT_FOR_B_AND_M 3199 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu); 3200#endif 3201 stcb->asoc.smallest_mtu = net->mtu; 3202 } 3203 } else { 3204 net->mtu = stcb->asoc.smallest_mtu; 3205 } 3206 if (stcb->asoc.smallest_mtu > net->mtu) { 3207#ifdef SCTP_PRINT_FOR_B_AND_M 3208 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n", 3209 net->mtu, stcb->asoc.smallest_mtu); 3210#endif 3211 stcb->asoc.smallest_mtu = net->mtu; 3212 } 3213 /* 3214 * We take the max of the burst limit times a MTU or the 3215 * INITIAL_CWND. We then limit this to 4 MTU's of sending. 3216 */ 3217 sctp_set_initial_cc_param(stcb, net); 3218 3219 3220 if (sctp_logging_level & (SCTP_CWND_MONITOR_ENABLE | SCTP_CWND_LOGGING_ENABLE)) { 3221 sctp_log_cwnd(stcb, net, 0, SCTP_CWND_INITIALIZATION); 3222 } 3223 /* 3224 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3225 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3226 */ 3227 net->find_pseudo_cumack = 1; 3228 net->find_rtx_pseudo_cumack = 1; 3229 net->src_addr_selected = 0; 3230 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3231 if (net->ro.ro_rt == NULL) { 3232 /* Since we have no route put it at the back */ 3233 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3234 } else if (netfirst == NULL) { 3235 /* We are the first one in the pool. */ 3236 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3237 } else if (netfirst->ro.ro_rt == NULL) { 3238 /* 3239 * First one has NO route. Place this one ahead of the first 3240 * one. 3241 */ 3242 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3243 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3244 /* 3245 * This one has a different interface than the one at the 3246 * top of the list. Place it ahead. 3247 */ 3248 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3249 } else { 3250 /* 3251 * Ok we have the same interface as the first one. Move 3252 * forward until we find either a) one with a NULL route... 3253 * insert ahead of that b) one with a different ifp.. insert 3254 * after that. c) end of the list.. insert at the tail. 3255 */ 3256 struct sctp_nets *netlook; 3257 3258 do { 3259 netlook = TAILQ_NEXT(netfirst, sctp_next); 3260 if (netlook == NULL) { 3261 /* End of the list */ 3262 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3263 break; 3264 } else if (netlook->ro.ro_rt == NULL) { 3265 /* next one has NO route */ 3266 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 3267 break; 3268 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 3269 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 3270 net, sctp_next); 3271 break; 3272 } 3273 /* Shift forward */ 3274 netfirst = netlook; 3275 } while (netlook != NULL); 3276 } 3277 3278 /* got to have a primary set */ 3279 if (stcb->asoc.primary_destination == 0) { 3280 stcb->asoc.primary_destination = net; 3281 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 3282 (net->ro.ro_rt) && 3283 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 3284 /* No route to current primary adopt new primary */ 3285 stcb->asoc.primary_destination = net; 3286 } 3287 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 3288 net); 3289 /* Validate primary is first */ 3290 net = TAILQ_FIRST(&stcb->asoc.nets); 3291 if ((net != stcb->asoc.primary_destination) && 3292 (stcb->asoc.primary_destination)) { 3293 /* 3294 * first one on the list is NOT the primary sctp_cmpaddr() 3295 * is much more efficent if the primary is the first on the 3296 * list, make it so. 3297 */ 3298 TAILQ_REMOVE(&stcb->asoc.nets, 3299 stcb->asoc.primary_destination, sctp_next); 3300 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 3301 stcb->asoc.primary_destination, sctp_next); 3302 } 3303 return (0); 3304} 3305 3306 3307/* 3308 * allocate an association and add it to the endpoint. The caller must be 3309 * careful to add all additional addresses once they are know right away or 3310 * else the assoc will be may experience a blackout scenario. 3311 */ 3312struct sctp_tcb * 3313sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 3314 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id) 3315{ 3316 struct sctp_tcb *stcb; 3317 struct sctp_association *asoc; 3318 struct sctpasochead *head; 3319 uint16_t rport; 3320 int err; 3321 3322 /* 3323 * Assumption made here: Caller has done a 3324 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 3325 * address does not exist already. 3326 */ 3327 if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) { 3328 /* Hit max assoc, sorry no more */ 3329 *error = ENOBUFS; 3330 return (NULL); 3331 } 3332 if (firstaddr == NULL) { 3333 *error = EINVAL; 3334 return (NULL); 3335 } 3336 SCTP_INP_RLOCK(inp); 3337 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 3338 /* 3339 * If its in the TCP pool, its NOT allowed to create an 3340 * association. The parent listener needs to call 3341 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 3342 * off, or connected one does this.. its an error. 3343 */ 3344 SCTP_INP_RUNLOCK(inp); 3345 *error = EINVAL; 3346 return (NULL); 3347 } 3348 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 3349#ifdef SCTP_DEBUG 3350 if (firstaddr) { 3351 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 3352 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 3353 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 3354 } else { 3355 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 3356 } 3357#endif /* SCTP_DEBUG */ 3358 if (firstaddr->sa_family == AF_INET) { 3359 struct sockaddr_in *sin; 3360 3361 sin = (struct sockaddr_in *)firstaddr; 3362 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 3363 /* Invalid address */ 3364 SCTP_INP_RUNLOCK(inp); 3365 *error = EINVAL; 3366 return (NULL); 3367 } 3368 rport = sin->sin_port; 3369 } else if (firstaddr->sa_family == AF_INET6) { 3370 struct sockaddr_in6 *sin6; 3371 3372 sin6 = (struct sockaddr_in6 *)firstaddr; 3373 if ((sin6->sin6_port == 0) || 3374 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 3375 /* Invalid address */ 3376 SCTP_INP_RUNLOCK(inp); 3377 *error = EINVAL; 3378 return (NULL); 3379 } 3380 rport = sin6->sin6_port; 3381 } else { 3382 /* not supported family type */ 3383 SCTP_INP_RUNLOCK(inp); 3384 *error = EINVAL; 3385 return (NULL); 3386 } 3387 SCTP_INP_RUNLOCK(inp); 3388 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 3389 /* 3390 * If you have not performed a bind, then we need to do the 3391 * ephemerial bind for you. 3392 */ 3393 if ((err = sctp_inpcb_bind(inp->sctp_socket, 3394 (struct sockaddr *)NULL, (struct sctp_ifa *)NULL, 3395 (struct thread *)NULL 3396 ))) { 3397 /* bind error, probably perm */ 3398 *error = err; 3399 return (NULL); 3400 } 3401 } 3402 stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb); 3403 if (stcb == NULL) { 3404 /* out of memory? */ 3405 *error = ENOMEM; 3406 return (NULL); 3407 } 3408 SCTP_INCR_ASOC_COUNT(); 3409 3410 bzero(stcb, sizeof(*stcb)); 3411 asoc = &stcb->asoc; 3412 SCTP_TCB_LOCK_INIT(stcb); 3413 SCTP_TCB_SEND_LOCK_INIT(stcb); 3414 /* setup back pointer's */ 3415 stcb->sctp_ep = inp; 3416 stcb->sctp_socket = inp->sctp_socket; 3417 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) { 3418 /* failed */ 3419 SCTP_TCB_LOCK_DESTROY(stcb); 3420 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3421 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3422 SCTP_DECR_ASOC_COUNT(); 3423 *error = err; 3424 return (NULL); 3425 } 3426 /* and the port */ 3427 stcb->rport = rport; 3428 SCTP_INP_INFO_WLOCK(); 3429 SCTP_INP_WLOCK(inp); 3430 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3431 /* inpcb freed while alloc going on */ 3432 SCTP_TCB_LOCK_DESTROY(stcb); 3433 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3434 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3435 SCTP_INP_WUNLOCK(inp); 3436 SCTP_INP_INFO_WUNLOCK(); 3437 SCTP_DECR_ASOC_COUNT(); 3438 *error = EINVAL; 3439 return (NULL); 3440 } 3441 SCTP_TCB_LOCK(stcb); 3442 3443 /* now that my_vtag is set, add it to the hash */ 3444 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, 3445 sctppcbinfo.hashasocmark)]; 3446 /* put it in the bucket in the vtag hash of assoc's for the system */ 3447 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 3448 SCTP_INP_INFO_WUNLOCK(); 3449 3450 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 3451 /* failure.. memory error? */ 3452 if (asoc->strmout) { 3453 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 3454 asoc->strmout = NULL; 3455 } 3456 if (asoc->mapping_array) { 3457 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 3458 asoc->mapping_array = NULL; 3459 } 3460 SCTP_DECR_ASOC_COUNT(); 3461 SCTP_TCB_LOCK_DESTROY(stcb); 3462 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3463 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3464 SCTP_INP_WUNLOCK(inp); 3465 *error = ENOBUFS; 3466 return (NULL); 3467 } 3468 /* Init all the timers */ 3469 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 3470 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 3471 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 3472 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 3473 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 3474 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 3475 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 3476 3477 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 3478 /* now file the port under the hash as well */ 3479 if (inp->sctp_tcbhash != NULL) { 3480 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 3481 inp->sctp_hashmark)]; 3482 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 3483 } 3484 SCTP_INP_WUNLOCK(inp); 3485 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 3486 return (stcb); 3487} 3488 3489 3490void 3491sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 3492{ 3493 struct sctp_association *asoc; 3494 3495 asoc = &stcb->asoc; 3496 asoc->numnets--; 3497 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 3498 if (net == asoc->primary_destination) { 3499 /* Reset primary */ 3500 struct sctp_nets *lnet; 3501 3502 lnet = TAILQ_FIRST(&asoc->nets); 3503 /* Try to find a confirmed primary */ 3504 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 3505 } 3506 if (net == asoc->last_data_chunk_from) { 3507 /* Reset primary */ 3508 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 3509 } 3510 if (net == asoc->last_control_chunk_from) { 3511 /* Clear net */ 3512 asoc->last_control_chunk_from = NULL; 3513 } 3514 sctp_free_remote_addr(net); 3515} 3516 3517/* 3518 * remove a remote endpoint address from an association, it will fail if the 3519 * address does not exist. 3520 */ 3521int 3522sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 3523{ 3524 /* 3525 * Here we need to remove a remote address. This is quite simple, we 3526 * first find it in the list of address for the association 3527 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 3528 * on that item. Note we do not allow it to be removed if there are 3529 * no other addresses. 3530 */ 3531 struct sctp_association *asoc; 3532 struct sctp_nets *net, *net_tmp; 3533 3534 asoc = &stcb->asoc; 3535 3536 /* locate the address */ 3537 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { 3538 net_tmp = TAILQ_NEXT(net, sctp_next); 3539 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 3540 continue; 3541 } 3542 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 3543 remaddr)) { 3544 /* we found the guy */ 3545 if (asoc->numnets < 2) { 3546 /* Must have at LEAST two remote addresses */ 3547 return (-1); 3548 } else { 3549 sctp_remove_net(stcb, net); 3550 return (0); 3551 } 3552 } 3553 } 3554 /* not found. */ 3555 return (-2); 3556} 3557 3558 3559void 3560sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time) 3561{ 3562 struct sctpvtaghead *chain; 3563 struct sctp_tagblock *twait_block; 3564 struct timeval now; 3565 int set, i; 3566 3567 (void)SCTP_GETTIME_TIMEVAL(&now); 3568 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 3569 set = 0; 3570 if (!SCTP_LIST_EMPTY(chain)) { 3571 /* Block(s) present, lets find space, and expire on the fly */ 3572 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 3573 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 3574 if ((twait_block->vtag_block[i].v_tag == 0) && 3575 !set) { 3576 twait_block->vtag_block[i].tv_sec_at_expire = 3577 now.tv_sec + time; 3578 twait_block->vtag_block[i].v_tag = tag; 3579 set = 1; 3580 } else if ((twait_block->vtag_block[i].v_tag) && 3581 ((long)twait_block->vtag_block[i].tv_sec_at_expire > 3582 now.tv_sec)) { 3583 /* Audit expires this guy */ 3584 twait_block->vtag_block[i].tv_sec_at_expire = 0; 3585 twait_block->vtag_block[i].v_tag = 0; 3586 if (set == 0) { 3587 /* Reuse it for my new tag */ 3588 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT; 3589 twait_block->vtag_block[0].v_tag = tag; 3590 set = 1; 3591 } 3592 } 3593 } 3594 if (set) { 3595 /* 3596 * We only do up to the block where we can 3597 * place our tag for audits 3598 */ 3599 break; 3600 } 3601 } 3602 } 3603 /* Need to add a new block to chain */ 3604 if (!set) { 3605 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 3606 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 3607 if (twait_block == NULL) { 3608 return; 3609 } 3610 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 3611 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 3612 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + 3613 SCTP_TIME_WAIT; 3614 twait_block->vtag_block[0].v_tag = tag; 3615 } 3616} 3617 3618 3619static void 3620sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 3621{ 3622 struct sctp_iterator *it; 3623 3624 /* 3625 * Unlock the tcb lock we do this so we avoid a dead lock scenario 3626 * where the iterator is waiting on the TCB lock and the TCB lock is 3627 * waiting on the iterator lock. 3628 */ 3629 it = stcb->asoc.stcb_starting_point_for_iterator; 3630 if (it == NULL) { 3631 return; 3632 } 3633 if (it->inp != stcb->sctp_ep) { 3634 /* hmm, focused on the wrong one? */ 3635 return; 3636 } 3637 if (it->stcb != stcb) { 3638 return; 3639 } 3640 it->stcb = LIST_NEXT(stcb, sctp_tcblist); 3641 if (it->stcb == NULL) { 3642 /* done with all asoc's in this assoc */ 3643 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3644 it->inp = NULL; 3645 } else { 3646 it->inp = LIST_NEXT(inp, sctp_list); 3647 } 3648 } 3649} 3650 3651 3652/* 3653 * Free the association after un-hashing the remote port. 3654 */ 3655int 3656sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 3657{ 3658 int i; 3659 struct sctp_association *asoc; 3660 struct sctp_nets *net, *prev; 3661 struct sctp_laddr *laddr; 3662 struct sctp_tmit_chunk *chk; 3663 struct sctp_asconf_addr *aparam; 3664 struct sctp_stream_reset_list *liste; 3665 struct sctp_queued_to_read *sq; 3666 struct sctp_stream_queue_pending *sp; 3667 sctp_sharedkey_t *shared_key; 3668 struct socket *so; 3669 int ccnt = 0; 3670 int cnt = 0; 3671 3672 /* first, lets purge the entry from the hash table. */ 3673 3674#ifdef SCTP_LOG_CLOSING 3675 sctp_log_closing(inp, stcb, 6); 3676#endif 3677 if (stcb->asoc.state == 0) { 3678#ifdef SCTP_LOG_CLOSING 3679 sctp_log_closing(inp, NULL, 7); 3680#endif 3681 /* there is no asoc, really TSNH :-0 */ 3682 return (1); 3683 } 3684 /* TEMP CODE */ 3685 if (stcb->freed_from_where == 0) { 3686 /* Only record the first place free happened from */ 3687 stcb->freed_from_where = from_location; 3688 } 3689 /* TEMP CODE */ 3690 3691 asoc = &stcb->asoc; 3692 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3693 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3694 /* nothing around */ 3695 so = NULL; 3696 else 3697 so = inp->sctp_socket; 3698 3699 /* 3700 * We used timer based freeing if a reader or writer is in the way. 3701 * So we first check if we are actually being called from a timer, 3702 * if so we abort early if a reader or writer is still in the way. 3703 */ 3704 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 3705 (from_inpcbfree == SCTP_NORMAL_PROC)) { 3706 /* 3707 * is it the timer driving us? if so are the reader/writers 3708 * gone? 3709 */ 3710 if (stcb->asoc.refcnt) { 3711 /* nope, reader or writer in the way */ 3712 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3713 /* no asoc destroyed */ 3714 SCTP_TCB_UNLOCK(stcb); 3715#ifdef SCTP_LOG_CLOSING 3716 sctp_log_closing(inp, stcb, 8); 3717#endif 3718 return (0); 3719 } 3720 } 3721 /* now clean up any other timers */ 3722 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 3723 asoc->hb_timer.self = NULL; 3724 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 3725 asoc->dack_timer.self = NULL; 3726 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3727 /*- 3728 * For stream reset we don't blast this unless 3729 * it is a str-reset timer, it might be the 3730 * free-asoc timer which we DON'T want to 3731 * disturb. 3732 */ 3733 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 3734 asoc->strreset_timer.self = NULL; 3735 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 3736 asoc->asconf_timer.self = NULL; 3737 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 3738 asoc->autoclose_timer.self = NULL; 3739 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 3740 asoc->shut_guard_timer.self = NULL; 3741 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 3742 asoc->delayed_event_timer.self = NULL; 3743 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 3744 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 3745 net->fr_timer.self = NULL; 3746 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 3747 net->rxt_timer.self = NULL; 3748 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 3749 net->pmtu_timer.self = NULL; 3750 } 3751 /* Now the read queue needs to be cleaned up (only once) */ 3752 cnt = 0; 3753 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 3754 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 3755 SCTP_INP_READ_LOCK(inp); 3756 TAILQ_FOREACH(sq, &inp->read_queue, next) { 3757 if (sq->stcb == stcb) { 3758 sq->do_not_ref_stcb = 1; 3759 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 3760 /* 3761 * If there is no end, there never will be 3762 * now. 3763 */ 3764 if (sq->end_added == 0) { 3765 /* Held for PD-API clear that. */ 3766 sq->pdapi_aborted = 1; 3767 sq->held_length = 0; 3768 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) { 3769 /* 3770 * Need to add a PD-API 3771 * aborted indication. 3772 * Setting the control_pdapi 3773 * assures that it will be 3774 * added right after this 3775 * msg. 3776 */ 3777 uint32_t strseq; 3778 3779 stcb->asoc.control_pdapi = sq; 3780 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 3781 sctp_notify_partial_delivery_indication(stcb, 3782 SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq); 3783 stcb->asoc.control_pdapi = NULL; 3784 } 3785 } 3786 /* Add an end to wake them */ 3787 sq->end_added = 1; 3788 cnt++; 3789 } 3790 } 3791 SCTP_INP_READ_UNLOCK(inp); 3792 if (stcb->block_entry) { 3793 cnt++; 3794 stcb->block_entry->error = ECONNRESET; 3795 stcb->block_entry = NULL; 3796 } 3797 } 3798 if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) { 3799 /* 3800 * reader or writer in the way, we have hopefully given him 3801 * something to chew on above. 3802 */ 3803 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3804 SCTP_TCB_UNLOCK(stcb); 3805 if (so) { 3806 SCTP_INP_RLOCK(inp); 3807 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3808 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3809 /* nothing around */ 3810 so = NULL; 3811 if (so) { 3812 /* Wake any reader/writers */ 3813 sctp_sorwakeup(inp, so); 3814 sctp_sowwakeup(inp, so); 3815 } 3816 SCTP_INP_RUNLOCK(inp); 3817 3818 } 3819#ifdef SCTP_LOG_CLOSING 3820 sctp_log_closing(inp, stcb, 9); 3821#endif 3822 /* no asoc destroyed */ 3823 return (0); 3824 } 3825#ifdef SCTP_LOG_CLOSING 3826 sctp_log_closing(inp, stcb, 10); 3827#endif 3828 /* 3829 * When I reach here, no others want to kill the assoc yet.. and I 3830 * own the lock. Now its possible an abort comes in when I do the 3831 * lock exchange below to grab all the locks to do the final take 3832 * out. to prevent this we increment the count, which will start a 3833 * timer and blow out above thus assuring us that we hold exclusive 3834 * killing of the asoc. Note that after getting back the TCB lock we 3835 * will go ahead and increment the counter back up and stop any 3836 * timer a passing stranger may have started :-S 3837 */ 3838 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3839 atomic_add_int(&stcb->asoc.refcnt, 1); 3840 3841 SCTP_TCB_UNLOCK(stcb); 3842 3843 SCTP_ITERATOR_LOCK(); 3844 SCTP_INP_INFO_WLOCK(); 3845 SCTP_INP_WLOCK(inp); 3846 SCTP_TCB_LOCK(stcb); 3847 } 3848 /* Double check the GONE flag */ 3849 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3850 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3851 /* nothing around */ 3852 so = NULL; 3853 3854 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 3855 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 3856 /* 3857 * For TCP type we need special handling when we are 3858 * connected. We also include the peel'ed off ones to. 3859 */ 3860 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 3861 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 3862 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 3863 if (so) { 3864 SOCK_LOCK(so); 3865 if (so->so_rcv.sb_cc == 0) { 3866 so->so_state &= ~(SS_ISCONNECTING | 3867 SS_ISDISCONNECTING | 3868 SS_ISCONFIRMING | 3869 SS_ISCONNECTED); 3870 } 3871 SOCK_UNLOCK(so); 3872 sctp_sowwakeup(inp, so); 3873 sctp_sorwakeup(inp, so); 3874 SCTP_SOWAKEUP(so); 3875 } 3876 } 3877 } 3878 /* 3879 * Make it invalid too, that way if its about to run it will abort 3880 * and return. 3881 */ 3882 sctp_iterator_asoc_being_freed(inp, stcb); 3883 /* re-increment the lock */ 3884 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3885 atomic_add_int(&stcb->asoc.refcnt, -1); 3886 } 3887 asoc->state = 0; 3888 if (inp->sctp_tcbhash) { 3889 LIST_REMOVE(stcb, sctp_tcbhash); 3890 } 3891 if (stcb->asoc.in_restart_hash) { 3892 LIST_REMOVE(stcb, sctp_tcbrestarhash); 3893 } 3894 /* Now lets remove it from the list of ALL associations in the EP */ 3895 LIST_REMOVE(stcb, sctp_tcblist); 3896 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3897 SCTP_INP_INCR_REF(inp); 3898 SCTP_INP_WUNLOCK(inp); 3899 SCTP_ITERATOR_UNLOCK(); 3900 } 3901 /* pull from vtag hash */ 3902 LIST_REMOVE(stcb, sctp_asocs); 3903 sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT); 3904 3905 3906 /* 3907 * Now restop the timers to be sure - this is paranoia at is finest! 3908 */ 3909 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3910 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 3911 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 3912 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3913 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 3914 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 3915 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 3916 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 3917 3918 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 3919 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 3920 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 3921 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 3922 } 3923 3924 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 3925 prev = NULL; 3926 /* 3927 * The chunk lists and such SHOULD be empty but we check them just 3928 * in case. 3929 */ 3930 /* anything on the wheel needs to be removed */ 3931 for (i = 0; i < asoc->streamoutcnt; i++) { 3932 struct sctp_stream_out *outs; 3933 3934 outs = &asoc->strmout[i]; 3935 /* now clean up any chunks here */ 3936 sp = TAILQ_FIRST(&outs->outqueue); 3937 while (sp) { 3938 TAILQ_REMOVE(&outs->outqueue, sp, next); 3939 if (sp->data) { 3940 sctp_m_freem(sp->data); 3941 sp->data = NULL; 3942 sp->tail_mbuf = NULL; 3943 } 3944 sctp_free_remote_addr(sp->net); 3945 sctp_free_spbufspace(stcb, asoc, sp); 3946 /* Free the zone stuff */ 3947 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp); 3948 SCTP_DECR_STRMOQ_COUNT(); 3949 /* sa_ignore FREED_MEMORY */ 3950 sp = TAILQ_FIRST(&outs->outqueue); 3951 } 3952 } 3953 3954 /* sa_ignore FREED_MEMORY */ 3955 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { 3956 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); 3957 SCTP_FREE(liste, SCTP_M_STRESET); 3958 } 3959 3960 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 3961 while (sq) { 3962 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 3963 if (sq->data) { 3964 sctp_m_freem(sq->data); 3965 sq->data = NULL; 3966 } 3967 sctp_free_remote_addr(sq->whoFrom); 3968 sq->whoFrom = NULL; 3969 sq->stcb = NULL; 3970 /* Free the ctl entry */ 3971 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); 3972 SCTP_DECR_READQ_COUNT(); 3973 /* sa_ignore FREED_MEMORY */ 3974 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 3975 } 3976 3977 chk = TAILQ_FIRST(&asoc->free_chunks); 3978 while (chk) { 3979 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 3980 if (chk->data) { 3981 sctp_m_freem(chk->data); 3982 chk->data = NULL; 3983 } 3984 ccnt++; 3985 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 3986 SCTP_DECR_CHK_COUNT(); 3987 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1); 3988 asoc->free_chunk_cnt--; 3989 /* sa_ignore FREED_MEMORY */ 3990 chk = TAILQ_FIRST(&asoc->free_chunks); 3991 } 3992 /* pending send queue SHOULD be empty */ 3993 if (!TAILQ_EMPTY(&asoc->send_queue)) { 3994 chk = TAILQ_FIRST(&asoc->send_queue); 3995 while (chk) { 3996 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 3997 if (chk->data) { 3998 sctp_m_freem(chk->data); 3999 chk->data = NULL; 4000 } 4001 ccnt++; 4002 sctp_free_remote_addr(chk->whoTo); 4003 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4004 SCTP_DECR_CHK_COUNT(); 4005 /* sa_ignore FREED_MEMORY */ 4006 chk = TAILQ_FIRST(&asoc->send_queue); 4007 } 4008 } 4009/* 4010 if(ccnt) { 4011 printf("Freed %d from send_queue\n", ccnt); 4012 ccnt = 0; 4013 } 4014*/ 4015 /* sent queue SHOULD be empty */ 4016 if (!TAILQ_EMPTY(&asoc->sent_queue)) { 4017 chk = TAILQ_FIRST(&asoc->sent_queue); 4018 while (chk) { 4019 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4020 if (chk->data) { 4021 sctp_m_freem(chk->data); 4022 chk->data = NULL; 4023 } 4024 ccnt++; 4025 sctp_free_remote_addr(chk->whoTo); 4026 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4027 SCTP_DECR_CHK_COUNT(); 4028 /* sa_ignore FREED_MEMORY */ 4029 chk = TAILQ_FIRST(&asoc->sent_queue); 4030 } 4031 } 4032/* 4033 if(ccnt) { 4034 printf("Freed %d from sent_queue\n", ccnt); 4035 ccnt = 0; 4036 } 4037*/ 4038 /* control queue MAY not be empty */ 4039 if (!TAILQ_EMPTY(&asoc->control_send_queue)) { 4040 chk = TAILQ_FIRST(&asoc->control_send_queue); 4041 while (chk) { 4042 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4043 if (chk->data) { 4044 sctp_m_freem(chk->data); 4045 chk->data = NULL; 4046 } 4047 ccnt++; 4048 sctp_free_remote_addr(chk->whoTo); 4049 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4050 SCTP_DECR_CHK_COUNT(); 4051 /* sa_ignore FREED_MEMORY */ 4052 chk = TAILQ_FIRST(&asoc->control_send_queue); 4053 } 4054 } 4055/* 4056 if(ccnt) { 4057 printf("Freed %d from ctrl_queue\n", ccnt); 4058 ccnt = 0; 4059 } 4060*/ 4061 if (!TAILQ_EMPTY(&asoc->reasmqueue)) { 4062 chk = TAILQ_FIRST(&asoc->reasmqueue); 4063 while (chk) { 4064 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4065 if (chk->data) { 4066 sctp_m_freem(chk->data); 4067 chk->data = NULL; 4068 } 4069 sctp_free_remote_addr(chk->whoTo); 4070 ccnt++; 4071 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4072 SCTP_DECR_CHK_COUNT(); 4073 /* sa_ignore FREED_MEMORY */ 4074 chk = TAILQ_FIRST(&asoc->reasmqueue); 4075 } 4076 } 4077/* 4078 if(ccnt) { 4079 printf("Freed %d from reasm_queue\n", ccnt); 4080 ccnt = 0; 4081 } 4082*/ 4083 if (asoc->mapping_array) { 4084 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4085 asoc->mapping_array = NULL; 4086 } 4087 /* the stream outs */ 4088 if (asoc->strmout) { 4089 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4090 asoc->strmout = NULL; 4091 } 4092 asoc->streamoutcnt = 0; 4093 if (asoc->strmin) { 4094 struct sctp_queued_to_read *ctl; 4095 4096 for (i = 0; i < asoc->streamincnt; i++) { 4097 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { 4098 /* We have somethings on the streamin queue */ 4099 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4100 while (ctl) { 4101 TAILQ_REMOVE(&asoc->strmin[i].inqueue, 4102 ctl, next); 4103 sctp_free_remote_addr(ctl->whoFrom); 4104 if (ctl->data) { 4105 sctp_m_freem(ctl->data); 4106 ctl->data = NULL; 4107 } 4108 /* 4109 * We don't free the address here 4110 * since all the net's were freed 4111 * above. 4112 */ 4113 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); 4114 SCTP_DECR_READQ_COUNT(); 4115 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4116 } 4117 } 4118 } 4119 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4120 asoc->strmin = NULL; 4121 } 4122 asoc->streamincnt = 0; 4123 while (!TAILQ_EMPTY(&asoc->nets)) { 4124 /* sa_ignore FREED_MEMORY */ 4125 net = TAILQ_FIRST(&asoc->nets); 4126 /* pull from list */ 4127 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) { 4128#ifdef INVARIANTS 4129 panic("no net's left alloc'ed, or list points to itself"); 4130#endif 4131 break; 4132 } 4133 prev = net; 4134 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4135 sctp_free_remote_addr(net); 4136 } 4137 4138 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) { 4139 /* sa_ignore FREED_MEMORY */ 4140 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); 4141 sctp_remove_laddr(laddr); 4142 } 4143 4144 /* pending asconf (address) parameters */ 4145 while (!TAILQ_EMPTY(&asoc->asconf_queue)) { 4146 /* sa_ignore FREED_MEMORY */ 4147 aparam = TAILQ_FIRST(&asoc->asconf_queue); 4148 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 4149 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 4150 } 4151 if (asoc->last_asconf_ack_sent != NULL) { 4152 sctp_m_freem(asoc->last_asconf_ack_sent); 4153 asoc->last_asconf_ack_sent = NULL; 4154 } 4155 /* clean up auth stuff */ 4156 if (asoc->local_hmacs) 4157 sctp_free_hmaclist(asoc->local_hmacs); 4158 if (asoc->peer_hmacs) 4159 sctp_free_hmaclist(asoc->peer_hmacs); 4160 4161 if (asoc->local_auth_chunks) 4162 sctp_free_chunklist(asoc->local_auth_chunks); 4163 if (asoc->peer_auth_chunks) 4164 sctp_free_chunklist(asoc->peer_auth_chunks); 4165 4166 sctp_free_authinfo(&asoc->authinfo); 4167 4168 shared_key = LIST_FIRST(&asoc->shared_keys); 4169 while (shared_key) { 4170 LIST_REMOVE(shared_key, next); 4171 sctp_free_sharedkey(shared_key); 4172 /* sa_ignore FREED_MEMORY */ 4173 shared_key = LIST_FIRST(&asoc->shared_keys); 4174 } 4175 4176 /* Insert new items here :> */ 4177 4178 /* Get rid of LOCK */ 4179 SCTP_TCB_LOCK_DESTROY(stcb); 4180 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4181 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4182 SCTP_INP_INFO_WUNLOCK(); 4183 SCTP_INP_RLOCK(inp); 4184 } 4185#ifdef SCTP_TRACK_FREED_ASOCS 4186 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4187 /* now clean up the tasoc itself */ 4188 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 4189 SCTP_DECR_ASOC_COUNT(); 4190 } else { 4191 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 4192 } 4193#else 4194 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 4195 SCTP_DECR_ASOC_COUNT(); 4196#endif 4197 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4198 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4199 /* 4200 * If its NOT the inp_free calling us AND sctp_close 4201 * as been called, we call back... 4202 */ 4203 SCTP_INP_RUNLOCK(inp); 4204 /* 4205 * This will start the kill timer (if we are the 4206 * lastone) since we hold an increment yet. But this 4207 * is the only safe way to do this since otherwise 4208 * if the socket closes at the same time we are here 4209 * we might collide in the cleanup. 4210 */ 4211 sctp_inpcb_free(inp, 4212 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 4213 SCTP_CALLED_DIRECTLY_NOCMPSET); 4214 SCTP_INP_DECR_REF(inp); 4215 goto out_of; 4216 } else { 4217 /* The socket is still open. */ 4218 SCTP_INP_DECR_REF(inp); 4219 } 4220 } 4221 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4222 SCTP_INP_RUNLOCK(inp); 4223 } 4224out_of: 4225 /* destroyed the asoc */ 4226#ifdef SCTP_LOG_CLOSING 4227 sctp_log_closing(inp, NULL, 11); 4228#endif 4229 return (1); 4230} 4231 4232 4233 4234/* 4235 * determine if a destination is "reachable" based upon the addresses bound 4236 * to the current endpoint (e.g. only v4 or v6 currently bound) 4237 */ 4238/* 4239 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 4240 * assoc level v4/v6 flags, as the assoc *may* not have the same address 4241 * types bound as its endpoint 4242 */ 4243int 4244sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 4245{ 4246 struct sctp_inpcb *inp; 4247 int answer; 4248 4249 /* 4250 * No locks here, the TCB, in all cases is already locked and an 4251 * assoc is up. There is either a INP lock by the caller applied (in 4252 * asconf case when deleting an address) or NOT in the HB case, 4253 * however if HB then the INP increment is up and the INP will not 4254 * be removed (on top of the fact that we have a TCB lock). So we 4255 * only want to read the sctp_flags, which is either bound-all or 4256 * not.. no protection needed since once an assoc is up you can't be 4257 * changing your binding. 4258 */ 4259 inp = stcb->sctp_ep; 4260 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4261 /* if bound all, destination is not restricted */ 4262 /* 4263 * RRS: Question during lock work: Is this correct? If you 4264 * are bound-all you still might need to obey the V4--V6 4265 * flags??? IMO this bound-all stuff needs to be removed! 4266 */ 4267 return (1); 4268 } 4269 /* NOTE: all "scope" checks are done when local addresses are added */ 4270 if (destaddr->sa_family == AF_INET6) { 4271 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 4272 } else if (destaddr->sa_family == AF_INET) { 4273 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 4274 } else { 4275 /* invalid family, so it's unreachable */ 4276 answer = 0; 4277 } 4278 return (answer); 4279} 4280 4281/* 4282 * update the inp_vflags on an endpoint 4283 */ 4284static void 4285sctp_update_ep_vflag(struct sctp_inpcb *inp) 4286{ 4287 struct sctp_laddr *laddr; 4288 4289 /* first clear the flag */ 4290 inp->ip_inp.inp.inp_vflag = 0; 4291 /* set the flag based on addresses on the ep list */ 4292 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4293 if (laddr->ifa == NULL) { 4294 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 4295 __FUNCTION__); 4296 continue; 4297 } 4298 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 4299 continue; 4300 } 4301 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 4302 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4303 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 4304 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4305 } 4306 } 4307} 4308 4309/* 4310 * Add the address to the endpoint local address list There is nothing to be 4311 * done if we are bound to all addresses 4312 */ 4313void 4314sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 4315{ 4316 struct sctp_laddr *laddr; 4317 int fnd, error = 0; 4318 4319 fnd = 0; 4320 4321 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4322 /* You are already bound to all. You have it already */ 4323 return; 4324 } 4325 if (ifa->address.sa.sa_family == AF_INET6) { 4326 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 4327 /* Can't bind a non-useable addr. */ 4328 return; 4329 } 4330 } 4331 /* first, is it already present? */ 4332 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4333 if (laddr->ifa == ifa) { 4334 fnd = 1; 4335 break; 4336 } 4337 } 4338 4339 if (fnd == 0) { 4340 /* Not in the ep list */ 4341 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 4342 if (error != 0) 4343 return; 4344 inp->laddr_count++; 4345 /* update inp_vflag flags */ 4346 if (ifa->address.sa.sa_family == AF_INET6) { 4347 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4348 } else if (ifa->address.sa.sa_family == AF_INET) { 4349 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4350 } 4351 } 4352 return; 4353} 4354 4355 4356/* 4357 * select a new (hopefully reachable) destination net (should only be used 4358 * when we deleted an ep addr that is the only usable source address to reach 4359 * the destination net) 4360 */ 4361static void 4362sctp_select_primary_destination(struct sctp_tcb *stcb) 4363{ 4364 struct sctp_nets *net; 4365 4366 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4367 /* for now, we'll just pick the first reachable one we find */ 4368 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 4369 continue; 4370 if (sctp_destination_is_reachable(stcb, 4371 (struct sockaddr *)&net->ro._l_addr)) { 4372 /* found a reachable destination */ 4373 stcb->asoc.primary_destination = net; 4374 } 4375 } 4376 /* I can't there from here! ...we're gonna die shortly... */ 4377} 4378 4379 4380/* 4381 * Delete the address from the endpoint local address list There is nothing 4382 * to be done if we are bound to all addresses 4383 */ 4384void 4385sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 4386{ 4387 struct sctp_laddr *laddr; 4388 int fnd; 4389 4390 fnd = 0; 4391 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4392 /* You are already bound to all. You have it already */ 4393 return; 4394 } 4395 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4396 if (laddr->ifa == ifa) { 4397 fnd = 1; 4398 break; 4399 } 4400 } 4401 if (fnd && (inp->laddr_count < 2)) { 4402 /* can't delete unless there are at LEAST 2 addresses */ 4403 return; 4404 } 4405 if (fnd) { 4406 /* 4407 * clean up any use of this address go through our 4408 * associations and clear any last_used_address that match 4409 * this one for each assoc, see if a new primary_destination 4410 * is needed 4411 */ 4412 struct sctp_tcb *stcb; 4413 4414 /* clean up "next_addr_touse" */ 4415 if (inp->next_addr_touse == laddr) 4416 /* delete this address */ 4417 inp->next_addr_touse = NULL; 4418 4419 /* clean up "last_used_address" */ 4420 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 4421 struct sctp_nets *net; 4422 4423 SCTP_TCB_LOCK(stcb); 4424 if (stcb->asoc.last_used_address == laddr) 4425 /* delete this address */ 4426 stcb->asoc.last_used_address = NULL; 4427 /* 4428 * Now spin through all the nets and purge any ref 4429 * to laddr 4430 */ 4431 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4432 if (net->ro._s_addr && 4433 (net->ro._s_addr->ifa == laddr->ifa)) { 4434 /* Yep, purge src address selected */ 4435 sctp_rtentry_t *rt; 4436 4437 /* delete this address if cached */ 4438 rt = net->ro.ro_rt; 4439 if (rt != NULL) { 4440 RTFREE(rt); 4441 net->ro.ro_rt = NULL; 4442 } 4443 sctp_free_ifa(net->ro._s_addr); 4444 net->ro._s_addr = NULL; 4445 net->src_addr_selected = 0; 4446 } 4447 } 4448 SCTP_TCB_UNLOCK(stcb); 4449 } /* for each tcb */ 4450 /* remove it from the ep list */ 4451 sctp_remove_laddr(laddr); 4452 inp->laddr_count--; 4453 /* update inp_vflag flags */ 4454 sctp_update_ep_vflag(inp); 4455 } 4456 return; 4457} 4458 4459/* 4460 * Add the addr to the TCB local address list For the BOUNDALL or dynamic 4461 * case, this is a "pending" address list (eg. addresses waiting for an 4462 * ASCONF-ACK response) For the subset binding, static case, this is a 4463 * "valid" address list 4464 */ 4465void 4466sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa, int restricted_list) 4467{ 4468 struct sctp_inpcb *inp; 4469 struct sctp_laddr *laddr; 4470 struct sctpladdr *list; 4471 4472 /* 4473 * Assumes TCB is locked.. and possibly the INP. May need to 4474 * confirm/fix that if we need it and is not the case. 4475 */ 4476 list = &stcb->asoc.sctp_restricted_addrs; 4477 4478 inp = stcb->sctp_ep; 4479 if (ifa->address.sa.sa_family == AF_INET6) { 4480 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 4481 /* Can't bind a non-existent addr. */ 4482 return; 4483 } 4484 } 4485 /* does the address already exist? */ 4486 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 4487 if (laddr->ifa == ifa) { 4488 return; 4489 } 4490 } 4491 4492 /* add to the list */ 4493 (void)sctp_insert_laddr(list, ifa, 0); 4494 return; 4495} 4496 4497/* 4498 * insert an laddr entry with the given ifa for the desired list 4499 */ 4500int 4501sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 4502{ 4503 struct sctp_laddr *laddr; 4504 4505 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 4506 if (laddr == NULL) { 4507 /* out of memory? */ 4508 return (EINVAL); 4509 } 4510 SCTP_INCR_LADDR_COUNT(); 4511 bzero(laddr, sizeof(*laddr)); 4512 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 4513 laddr->ifa = ifa; 4514 laddr->action = act; 4515 atomic_add_int(&ifa->refcount, 1); 4516 /* insert it */ 4517 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 4518 4519 return (0); 4520} 4521 4522/* 4523 * Remove an laddr entry from the local address list (on an assoc) 4524 */ 4525void 4526sctp_remove_laddr(struct sctp_laddr *laddr) 4527{ 4528 4529 /* remove from the list */ 4530 LIST_REMOVE(laddr, sctp_nxt_addr); 4531 sctp_free_ifa(laddr->ifa); 4532 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr); 4533 SCTP_DECR_LADDR_COUNT(); 4534} 4535 4536/* 4537 * Remove an address from the TCB local address list 4538 */ 4539void 4540sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 4541{ 4542 struct sctp_inpcb *inp; 4543 struct sctp_laddr *laddr; 4544 4545 /* 4546 * This is called by asconf work. It is assumed that a) The TCB is 4547 * locked and b) The INP is locked. This is true in as much as I can 4548 * trace through the entry asconf code where I did these locks. 4549 * Again, the ASCONF code is a bit different in that it does lock 4550 * the INP during its work often times. This must be since we don't 4551 * want other proc's looking up things while what they are looking 4552 * up is changing :-D 4553 */ 4554 4555 inp = stcb->sctp_ep; 4556 /* if subset bound and don't allow ASCONF's, can't delete last */ 4557 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 4558 (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF) == 0)) { 4559 if (stcb->asoc.numnets < 2) { 4560 /* can't delete last address */ 4561 return; 4562 } 4563 } 4564 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 4565 /* remove the address if it exists */ 4566 if (laddr->ifa == NULL) 4567 continue; 4568 if (laddr->ifa == ifa) { 4569 sctp_remove_laddr(laddr); 4570 return; 4571 } 4572 } 4573 4574 /* address not found! */ 4575 return; 4576} 4577 4578static char sctp_pcb_initialized = 0; 4579 4580/* 4581 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 4582 */ 4583/* sysctl */ 4584static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 4585static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 4586 4587void 4588sctp_pcb_init() 4589{ 4590 /* 4591 * SCTP initialization for the PCB structures should be called by 4592 * the sctp_init() funciton. 4593 */ 4594 int i; 4595 4596 if (sctp_pcb_initialized != 0) { 4597 /* error I was called twice */ 4598 return; 4599 } 4600 sctp_pcb_initialized = 1; 4601 4602 bzero(&sctpstat, sizeof(struct sctpstat)); 4603 (void)SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime); 4604 /* init the empty list of (All) Endpoints */ 4605 LIST_INIT(&sctppcbinfo.listhead); 4606 4607 /* init the iterator head */ 4608 TAILQ_INIT(&sctppcbinfo.iteratorhead); 4609 4610 /* init the hash table of endpoints */ 4611 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize); 4612 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize); 4613 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale); 4614 sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31), 4615 &sctppcbinfo.hashasocmark); 4616 sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize, 4617 &sctppcbinfo.hashmark); 4618 sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize, 4619 &sctppcbinfo.hashtcpmark); 4620 sctppcbinfo.hashtblsize = sctp_hashtblsize; 4621 4622 /* init the small hash table we use to track restarted asoc's */ 4623 sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, 4624 &sctppcbinfo.hashrestartmark); 4625 4626 4627 sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 4628 &sctppcbinfo.hashvrfmark); 4629 4630 sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 4631 &sctppcbinfo.vrf_ifn_hashmark); 4632 4633 /* init the zones */ 4634 /* 4635 * FIX ME: Should check for NULL returns, but if it does fail we are 4636 * doomed to panic anyways... add later maybe. 4637 */ 4638 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep", 4639 sizeof(struct sctp_inpcb), maxsockets); 4640 4641 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc", 4642 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 4643 4644 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr", 4645 sizeof(struct sctp_laddr), 4646 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 4647 4648 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr", 4649 sizeof(struct sctp_nets), 4650 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 4651 4652 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk", 4653 sizeof(struct sctp_tmit_chunk), 4654 (sctp_max_number_of_assoc * sctp_chunkscale)); 4655 4656 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq", 4657 sizeof(struct sctp_queued_to_read), 4658 (sctp_max_number_of_assoc * sctp_chunkscale)); 4659 4660 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out", 4661 sizeof(struct sctp_stream_queue_pending), 4662 (sctp_max_number_of_assoc * sctp_chunkscale)); 4663 4664 /* Master Lock INIT for info structure */ 4665 SCTP_INP_INFO_LOCK_INIT(); 4666 SCTP_STATLOG_INIT_LOCK(); 4667 SCTP_ITERATOR_LOCK_INIT(); 4668 4669 SCTP_IPI_COUNT_INIT(); 4670 SCTP_IPI_ADDR_INIT(); 4671 SCTP_IPI_ITERATOR_WQ_INIT(); 4672#ifdef SCTP_PACKET_LOGGING 4673 SCTP_IP_PKTLOG_INIT(); 4674#endif 4675 LIST_INIT(&sctppcbinfo.addr_wq); 4676 4677 /* not sure if we need all the counts */ 4678 sctppcbinfo.ipi_count_ep = 0; 4679 /* assoc/tcb zone info */ 4680 sctppcbinfo.ipi_count_asoc = 0; 4681 /* local addrlist zone info */ 4682 sctppcbinfo.ipi_count_laddr = 0; 4683 /* remote addrlist zone info */ 4684 sctppcbinfo.ipi_count_raddr = 0; 4685 /* chunk info */ 4686 sctppcbinfo.ipi_count_chunk = 0; 4687 4688 /* socket queue zone info */ 4689 sctppcbinfo.ipi_count_readq = 0; 4690 4691 /* stream out queue cont */ 4692 sctppcbinfo.ipi_count_strmoq = 0; 4693 4694 sctppcbinfo.ipi_free_strmoq = 0; 4695 sctppcbinfo.ipi_free_chunks = 0; 4696 4697 SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer); 4698 4699 /* Init the TIMEWAIT list */ 4700 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) { 4701 LIST_INIT(&sctppcbinfo.vtag_timewait[i]); 4702 } 4703 4704#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 4705 sctppcbinfo.iterator_running = 0; 4706 sctp_startup_iterator(); 4707#endif 4708 4709 /* 4710 * INIT the default VRF which for BSD is the only one, other O/S's 4711 * may have more. But initially they must start with one and then 4712 * add the VRF's as addresses are added. 4713 */ 4714 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 4715 4716} 4717 4718 4719int 4720sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 4721 int iphlen, int offset, int limit, struct sctphdr *sh, 4722 struct sockaddr *altsa) 4723{ 4724 /* 4725 * grub through the INIT pulling addresses and loading them to the 4726 * nets structure in the asoc. The from address in the mbuf should 4727 * also be loaded (if it is not already). This routine can be called 4728 * with either INIT or INIT-ACK's as long as the m points to the IP 4729 * packet and the offset points to the beginning of the parameters. 4730 */ 4731 struct sctp_inpcb *inp, *l_inp; 4732 struct sctp_nets *net, *net_tmp; 4733 struct ip *iph; 4734 struct sctp_paramhdr *phdr, parm_buf; 4735 struct sctp_tcb *stcb_tmp; 4736 uint16_t ptype, plen; 4737 struct sockaddr *sa; 4738 struct sockaddr_storage dest_store; 4739 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 4740 struct sockaddr_in sin; 4741 struct sockaddr_in6 sin6; 4742 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 4743 struct sctp_auth_random *p_random = NULL; 4744 uint16_t random_len = 0; 4745 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 4746 struct sctp_auth_hmac_algo *hmacs = NULL; 4747 uint16_t hmacs_len = 0; 4748 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 4749 struct sctp_auth_chunk_list *chunks = NULL; 4750 uint16_t num_chunks = 0; 4751 sctp_key_t *new_key; 4752 uint32_t keylen; 4753 int got_random = 0, got_hmacs = 0, got_chklist = 0; 4754 4755 /* First get the destination address setup too. */ 4756 memset(&sin, 0, sizeof(sin)); 4757 memset(&sin6, 0, sizeof(sin6)); 4758 4759 sin.sin_family = AF_INET; 4760 sin.sin_len = sizeof(sin); 4761 sin.sin_port = stcb->rport; 4762 4763 sin6.sin6_family = AF_INET6; 4764 sin6.sin6_len = sizeof(struct sockaddr_in6); 4765 sin6.sin6_port = stcb->rport; 4766 if (altsa == NULL) { 4767 iph = mtod(m, struct ip *); 4768 if (iph->ip_v == IPVERSION) { 4769 /* its IPv4 */ 4770 struct sockaddr_in *sin_2; 4771 4772 sin_2 = (struct sockaddr_in *)(local_sa); 4773 memset(sin_2, 0, sizeof(sin)); 4774 sin_2->sin_family = AF_INET; 4775 sin_2->sin_len = sizeof(sin); 4776 sin_2->sin_port = sh->dest_port; 4777 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 4778 sin.sin_addr = iph->ip_src; 4779 sa = (struct sockaddr *)&sin; 4780 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 4781 /* its IPv6 */ 4782 struct ip6_hdr *ip6; 4783 struct sockaddr_in6 *sin6_2; 4784 4785 ip6 = mtod(m, struct ip6_hdr *); 4786 sin6_2 = (struct sockaddr_in6 *)(local_sa); 4787 memset(sin6_2, 0, sizeof(sin6)); 4788 sin6_2->sin6_family = AF_INET6; 4789 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 4790 sin6_2->sin6_port = sh->dest_port; 4791 sin6.sin6_addr = ip6->ip6_src; 4792 sa = (struct sockaddr *)&sin6; 4793 } else { 4794 sa = NULL; 4795 } 4796 } else { 4797 /* 4798 * For cookies we use the src address NOT from the packet 4799 * but from the original INIT 4800 */ 4801 sa = altsa; 4802 } 4803 /* Turn off ECN until we get through all params */ 4804 stcb->asoc.ecn_allowed = 0; 4805 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4806 /* mark all addresses that we have currently on the list */ 4807 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 4808 } 4809 /* does the source address already exist? if so skip it */ 4810 l_inp = inp = stcb->sctp_ep; 4811 4812 atomic_add_int(&stcb->asoc.refcnt, 1); 4813 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 4814 atomic_add_int(&stcb->asoc.refcnt, -1); 4815 4816 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 4817 /* we must add the source address */ 4818 /* no scope set here since we have a tcb already. */ 4819 if ((sa->sa_family == AF_INET) && 4820 (stcb->asoc.ipv4_addr_legal)) { 4821 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 4822 return (-1); 4823 } 4824 } else if ((sa->sa_family == AF_INET6) && 4825 (stcb->asoc.ipv6_addr_legal)) { 4826 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 4827 return (-2); 4828 } 4829 } 4830 } else { 4831 if (net_tmp != NULL && stcb_tmp == stcb) { 4832 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 4833 } else if (stcb_tmp != stcb) { 4834 /* It belongs to another association? */ 4835 if (stcb_tmp) 4836 SCTP_TCB_UNLOCK(stcb_tmp); 4837 return (-3); 4838 } 4839 } 4840 if (stcb->asoc.state == 0) { 4841 /* the assoc was freed? */ 4842 return (-4); 4843 } 4844 /* now we must go through each of the params. */ 4845 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 4846 while (phdr) { 4847 ptype = ntohs(phdr->param_type); 4848 plen = ntohs(phdr->param_length); 4849 /* 4850 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 4851 * (int)plen); 4852 */ 4853 if (offset + plen > limit) { 4854 break; 4855 } 4856 if (plen == 0) { 4857 break; 4858 } 4859 if (ptype == SCTP_IPV4_ADDRESS) { 4860 if (stcb->asoc.ipv4_addr_legal) { 4861 struct sctp_ipv4addr_param *p4, p4_buf; 4862 4863 /* ok get the v4 address and check/add */ 4864 phdr = sctp_get_next_param(m, offset, 4865 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 4866 if (plen != sizeof(struct sctp_ipv4addr_param) || 4867 phdr == NULL) { 4868 return (-5); 4869 } 4870 p4 = (struct sctp_ipv4addr_param *)phdr; 4871 sin.sin_addr.s_addr = p4->addr; 4872 if (IN_MULTICAST(sin.sin_addr.s_addr)) { 4873 /* Skip multi-cast addresses */ 4874 goto next_param; 4875 } 4876 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 4877 (sin.sin_addr.s_addr == INADDR_ANY)) { 4878 goto next_param; 4879 } 4880 sa = (struct sockaddr *)&sin; 4881 inp = stcb->sctp_ep; 4882 atomic_add_int(&stcb->asoc.refcnt, 1); 4883 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 4884 local_sa, stcb); 4885 atomic_add_int(&stcb->asoc.refcnt, -1); 4886 4887 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 4888 inp == NULL) { 4889 /* we must add the source address */ 4890 /* 4891 * no scope set since we have a tcb 4892 * already 4893 */ 4894 4895 /* 4896 * we must validate the state again 4897 * here 4898 */ 4899 if (stcb->asoc.state == 0) { 4900 /* the assoc was freed? */ 4901 return (-7); 4902 } 4903 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 4904 return (-8); 4905 } 4906 } else if (stcb_tmp == stcb) { 4907 if (stcb->asoc.state == 0) { 4908 /* the assoc was freed? */ 4909 return (-10); 4910 } 4911 if (net != NULL) { 4912 /* clear flag */ 4913 net->dest_state &= 4914 ~SCTP_ADDR_NOT_IN_ASSOC; 4915 } 4916 } else { 4917 /* 4918 * strange, address is in another 4919 * assoc? straighten out locks. 4920 */ 4921 if (stcb->asoc.state == 0) { 4922 /* the assoc was freed? */ 4923 return (-12); 4924 } 4925 return (-13); 4926 } 4927 } 4928 } else if (ptype == SCTP_IPV6_ADDRESS) { 4929 if (stcb->asoc.ipv6_addr_legal) { 4930 /* ok get the v6 address and check/add */ 4931 struct sctp_ipv6addr_param *p6, p6_buf; 4932 4933 phdr = sctp_get_next_param(m, offset, 4934 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 4935 if (plen != sizeof(struct sctp_ipv6addr_param) || 4936 phdr == NULL) { 4937 return (-14); 4938 } 4939 p6 = (struct sctp_ipv6addr_param *)phdr; 4940 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 4941 sizeof(p6->addr)); 4942 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 4943 /* Skip multi-cast addresses */ 4944 goto next_param; 4945 } 4946 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 4947 /* 4948 * Link local make no sense without 4949 * scope 4950 */ 4951 goto next_param; 4952 } 4953 sa = (struct sockaddr *)&sin6; 4954 inp = stcb->sctp_ep; 4955 atomic_add_int(&stcb->asoc.refcnt, 1); 4956 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 4957 local_sa, stcb); 4958 atomic_add_int(&stcb->asoc.refcnt, -1); 4959 if (stcb_tmp == NULL && (inp == stcb->sctp_ep || 4960 inp == NULL)) { 4961 /* 4962 * we must validate the state again 4963 * here 4964 */ 4965 if (stcb->asoc.state == 0) { 4966 /* the assoc was freed? */ 4967 return (-16); 4968 } 4969 /* 4970 * we must add the address, no scope 4971 * set 4972 */ 4973 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 4974 return (-17); 4975 } 4976 } else if (stcb_tmp == stcb) { 4977 /* 4978 * we must validate the state again 4979 * here 4980 */ 4981 if (stcb->asoc.state == 0) { 4982 /* the assoc was freed? */ 4983 return (-19); 4984 } 4985 if (net != NULL) { 4986 /* clear flag */ 4987 net->dest_state &= 4988 ~SCTP_ADDR_NOT_IN_ASSOC; 4989 } 4990 } else { 4991 /* 4992 * strange, address is in another 4993 * assoc? straighten out locks. 4994 */ 4995 if (stcb->asoc.state == 0) { 4996 /* the assoc was freed? */ 4997 return (-21); 4998 } 4999 return (-22); 5000 } 5001 } 5002 } else if (ptype == SCTP_ECN_CAPABLE) { 5003 stcb->asoc.ecn_allowed = 1; 5004 } else if (ptype == SCTP_ULP_ADAPTATION) { 5005 if (stcb->asoc.state != SCTP_STATE_OPEN) { 5006 struct sctp_adaptation_layer_indication ai, 5007 *aip; 5008 5009 phdr = sctp_get_next_param(m, offset, 5010 (struct sctp_paramhdr *)&ai, sizeof(ai)); 5011 aip = (struct sctp_adaptation_layer_indication *)phdr; 5012 if (aip) { 5013 sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION, 5014 stcb, ntohl(aip->indication), NULL); 5015 } 5016 } 5017 } else if (ptype == SCTP_SET_PRIM_ADDR) { 5018 struct sctp_asconf_addr_param lstore, *fee; 5019 struct sctp_asconf_addrv4_param *fii; 5020 int lptype; 5021 struct sockaddr *lsa = NULL; 5022 5023 stcb->asoc.peer_supports_asconf = 1; 5024 if (plen > sizeof(lstore)) { 5025 return (-23); 5026 } 5027 phdr = sctp_get_next_param(m, offset, 5028 (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore))); 5029 if (phdr == NULL) { 5030 return (-24); 5031 } 5032 fee = (struct sctp_asconf_addr_param *)phdr; 5033 lptype = ntohs(fee->addrp.ph.param_type); 5034 if (lptype == SCTP_IPV4_ADDRESS) { 5035 if (plen != 5036 sizeof(struct sctp_asconf_addrv4_param)) { 5037 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 5038 (int)sizeof(struct sctp_asconf_addrv4_param), 5039 plen); 5040 } else { 5041 fii = (struct sctp_asconf_addrv4_param *)fee; 5042 sin.sin_addr.s_addr = fii->addrp.addr; 5043 lsa = (struct sockaddr *)&sin; 5044 } 5045 } else if (lptype == SCTP_IPV6_ADDRESS) { 5046 if (plen != 5047 sizeof(struct sctp_asconf_addr_param)) { 5048 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 5049 (int)sizeof(struct sctp_asconf_addr_param), 5050 plen); 5051 } else { 5052 memcpy(sin6.sin6_addr.s6_addr, 5053 fee->addrp.addr, 5054 sizeof(fee->addrp.addr)); 5055 lsa = (struct sockaddr *)&sin6; 5056 } 5057 } 5058 if (lsa) { 5059 (void)sctp_set_primary_addr(stcb, sa, NULL); 5060 } 5061 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 5062 /* Peer supports pr-sctp */ 5063 stcb->asoc.peer_supports_prsctp = 1; 5064 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 5065 /* A supported extension chunk */ 5066 struct sctp_supported_chunk_types_param *pr_supported; 5067 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 5068 int num_ent, i; 5069 5070 phdr = sctp_get_next_param(m, offset, 5071 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 5072 if (phdr == NULL) { 5073 return (-25); 5074 } 5075 stcb->asoc.peer_supports_asconf = 0; 5076 stcb->asoc.peer_supports_prsctp = 0; 5077 stcb->asoc.peer_supports_pktdrop = 0; 5078 stcb->asoc.peer_supports_strreset = 0; 5079 stcb->asoc.peer_supports_auth = 0; 5080 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 5081 num_ent = plen - sizeof(struct sctp_paramhdr); 5082 for (i = 0; i < num_ent; i++) { 5083 switch (pr_supported->chunk_types[i]) { 5084 case SCTP_ASCONF: 5085 case SCTP_ASCONF_ACK: 5086 stcb->asoc.peer_supports_asconf = 1; 5087 break; 5088 case SCTP_FORWARD_CUM_TSN: 5089 stcb->asoc.peer_supports_prsctp = 1; 5090 break; 5091 case SCTP_PACKET_DROPPED: 5092 stcb->asoc.peer_supports_pktdrop = 1; 5093 break; 5094 case SCTP_STREAM_RESET: 5095 stcb->asoc.peer_supports_strreset = 1; 5096 break; 5097 case SCTP_AUTHENTICATION: 5098 stcb->asoc.peer_supports_auth = 1; 5099 break; 5100 default: 5101 /* one I have not learned yet */ 5102 break; 5103 5104 } 5105 } 5106 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 5107 /* Peer supports ECN-nonce */ 5108 stcb->asoc.peer_supports_ecn_nonce = 1; 5109 stcb->asoc.ecn_nonce_allowed = 1; 5110 } else if (ptype == SCTP_RANDOM) { 5111 if (plen > sizeof(random_store)) 5112 break; 5113 if (got_random) { 5114 /* already processed a RANDOM */ 5115 goto next_param; 5116 } 5117 phdr = sctp_get_next_param(m, offset, 5118 (struct sctp_paramhdr *)random_store, 5119 min(sizeof(random_store), plen)); 5120 if (phdr == NULL) 5121 return (-26); 5122 p_random = (struct sctp_auth_random *)phdr; 5123 random_len = plen - sizeof(*p_random); 5124 /* enforce the random length */ 5125 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 5126 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 5127 return (-27); 5128 } 5129 got_random = 1; 5130 } else if (ptype == SCTP_HMAC_LIST) { 5131 int num_hmacs; 5132 int i; 5133 5134 if (plen > sizeof(hmacs_store)) 5135 break; 5136 if (got_hmacs) { 5137 /* already processed a HMAC list */ 5138 goto next_param; 5139 } 5140 phdr = sctp_get_next_param(m, offset, 5141 (struct sctp_paramhdr *)hmacs_store, 5142 min(plen, sizeof(hmacs_store))); 5143 if (phdr == NULL) 5144 return (-28); 5145 hmacs = (struct sctp_auth_hmac_algo *)phdr; 5146 hmacs_len = plen - sizeof(*hmacs); 5147 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 5148 /* validate the hmac list */ 5149 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 5150 return (-29); 5151 } 5152 if (stcb->asoc.peer_hmacs != NULL) 5153 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 5154 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 5155 if (stcb->asoc.peer_hmacs != NULL) { 5156 for (i = 0; i < num_hmacs; i++) { 5157 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 5158 ntohs(hmacs->hmac_ids[i])); 5159 } 5160 } 5161 got_hmacs = 1; 5162 } else if (ptype == SCTP_CHUNK_LIST) { 5163 int i; 5164 5165 if (plen > sizeof(chunks_store)) 5166 break; 5167 if (got_chklist) { 5168 /* already processed a Chunks list */ 5169 goto next_param; 5170 } 5171 phdr = sctp_get_next_param(m, offset, 5172 (struct sctp_paramhdr *)chunks_store, 5173 min(plen, sizeof(chunks_store))); 5174 if (phdr == NULL) 5175 return (-30); 5176 chunks = (struct sctp_auth_chunk_list *)phdr; 5177 num_chunks = plen - sizeof(*chunks); 5178 if (stcb->asoc.peer_auth_chunks != NULL) 5179 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 5180 else 5181 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 5182 for (i = 0; i < num_chunks; i++) { 5183 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 5184 stcb->asoc.peer_auth_chunks); 5185 } 5186 got_chklist = 1; 5187 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 5188 (ptype == SCTP_STATE_COOKIE) || 5189 (ptype == SCTP_UNRECOG_PARAM) || 5190 (ptype == SCTP_COOKIE_PRESERVE) || 5191 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 5192 (ptype == SCTP_ADD_IP_ADDRESS) || 5193 (ptype == SCTP_DEL_IP_ADDRESS) || 5194 (ptype == SCTP_ERROR_CAUSE_IND) || 5195 (ptype == SCTP_SUCCESS_REPORT)) { 5196 /* don't care */ ; 5197 } else { 5198 if ((ptype & 0x8000) == 0x0000) { 5199 /* 5200 * must stop processing the rest of the 5201 * param's. Any report bits were handled 5202 * with the call to 5203 * sctp_arethere_unrecognized_parameters() 5204 * when the INIT or INIT-ACK was first seen. 5205 */ 5206 break; 5207 } 5208 } 5209next_param: 5210 offset += SCTP_SIZE32(plen); 5211 if (offset >= limit) { 5212 break; 5213 } 5214 phdr = sctp_get_next_param(m, offset, &parm_buf, 5215 sizeof(parm_buf)); 5216 } 5217 /* Now check to see if we need to purge any addresses */ 5218 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { 5219 net_tmp = TAILQ_NEXT(net, sctp_next); 5220 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 5221 SCTP_ADDR_NOT_IN_ASSOC) { 5222 /* This address has been removed from the asoc */ 5223 /* remove and free it */ 5224 stcb->asoc.numnets--; 5225 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 5226 sctp_free_remote_addr(net); 5227 if (net == stcb->asoc.primary_destination) { 5228 stcb->asoc.primary_destination = NULL; 5229 sctp_select_primary_destination(stcb); 5230 } 5231 } 5232 } 5233 /* validate authentication required parameters */ 5234 if (got_random && got_hmacs) { 5235 stcb->asoc.peer_supports_auth = 1; 5236 } else { 5237 stcb->asoc.peer_supports_auth = 0; 5238 } 5239 if (!stcb->asoc.peer_supports_auth && got_chklist) { 5240 /* peer does not support auth but sent a chunks list? */ 5241 return (-31); 5242 } 5243 if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf && 5244 !stcb->asoc.peer_supports_auth) { 5245 /* peer supports asconf but not auth? */ 5246 return (-32); 5247 } 5248 /* concatenate the full random key */ 5249#ifdef SCTP_AUTH_DRAFT_04 5250 keylen = random_len; 5251 new_key = sctp_alloc_key(keylen); 5252 if (new_key != NULL) { 5253 /* copy in the RANDOM */ 5254 if (p_random != NULL) 5255 bcopy(p_random->random_data, new_key->key, random_len); 5256 } 5257#else 5258 keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks + 5259 sizeof(*hmacs) + hmacs_len; 5260 new_key = sctp_alloc_key(keylen); 5261 if (new_key != NULL) { 5262 /* copy in the RANDOM */ 5263 if (p_random != NULL) { 5264 keylen = sizeof(*p_random) + random_len; 5265 bcopy(p_random, new_key->key, keylen); 5266 } 5267 /* append in the AUTH chunks */ 5268 if (chunks != NULL) { 5269 bcopy(chunks, new_key->key + keylen, 5270 sizeof(*chunks) + num_chunks); 5271 keylen += sizeof(*chunks) + num_chunks; 5272 } 5273 /* append in the HMACs */ 5274 if (hmacs != NULL) { 5275 bcopy(hmacs, new_key->key + keylen, 5276 sizeof(*hmacs) + hmacs_len); 5277 } 5278 } 5279#endif 5280 else { 5281 /* failed to get memory for the key */ 5282 return (-33); 5283 } 5284 if (stcb->asoc.authinfo.peer_random != NULL) 5285 sctp_free_key(stcb->asoc.authinfo.peer_random); 5286 stcb->asoc.authinfo.peer_random = new_key; 5287#ifdef SCTP_AUTH_DRAFT_04 5288 /* don't include the chunks and hmacs for draft -04 */ 5289 stcb->asoc.authinfo.peer_random->keylen = random_len; 5290#endif 5291 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 5292 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 5293 5294 return (0); 5295} 5296 5297int 5298sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 5299 struct sctp_nets *net) 5300{ 5301 /* make sure the requested primary address exists in the assoc */ 5302 if (net == NULL && sa) 5303 net = sctp_findnet(stcb, sa); 5304 5305 if (net == NULL) { 5306 /* didn't find the requested primary address! */ 5307 return (-1); 5308 } else { 5309 /* set the primary address */ 5310 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 5311 /* Must be confirmed, so queue to set */ 5312 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 5313 return (0); 5314 } 5315 stcb->asoc.primary_destination = net; 5316 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 5317 net = TAILQ_FIRST(&stcb->asoc.nets); 5318 if (net != stcb->asoc.primary_destination) { 5319 /* 5320 * first one on the list is NOT the primary 5321 * sctp_cmpaddr() is much more efficent if the 5322 * primary is the first on the list, make it so. 5323 */ 5324 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 5325 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 5326 } 5327 return (0); 5328 } 5329} 5330 5331 5332int 5333sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now) 5334{ 5335 /* 5336 * This function serves two purposes. It will see if a TAG can be 5337 * re-used and return 1 for yes it is ok and 0 for don't use that 5338 * tag. A secondary function it will do is purge out old tags that 5339 * can be removed. 5340 */ 5341 struct sctpasochead *head; 5342 struct sctpvtaghead *chain; 5343 struct sctp_tagblock *twait_block; 5344 struct sctp_tcb *stcb; 5345 int i; 5346 5347 SCTP_INP_INFO_WLOCK(); 5348 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 5349 /* First is the vtag in use ? */ 5350 5351 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag, 5352 sctppcbinfo.hashasocmark)]; 5353 if (head == NULL) { 5354 goto check_restart; 5355 } 5356 LIST_FOREACH(stcb, head, sctp_asocs) { 5357 5358 if (stcb->asoc.my_vtag == tag) { 5359 /* 5360 * We should remove this if and return 0 always if 5361 * we want vtags unique across all endpoints. For 5362 * now within a endpoint is ok. 5363 */ 5364 if (inp == stcb->sctp_ep) { 5365 /* bad tag, in use */ 5366 SCTP_INP_INFO_WUNLOCK(); 5367 return (0); 5368 } 5369 } 5370 } 5371check_restart: 5372 /* Now lets check the restart hash */ 5373 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag, 5374 sctppcbinfo.hashrestartmark)]; 5375 if (head == NULL) { 5376 goto check_time_wait; 5377 } 5378 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { 5379 if (stcb->asoc.assoc_id == tag) { 5380 /* candidate */ 5381 if (inp == stcb->sctp_ep) { 5382 /* bad tag, in use */ 5383 SCTP_INP_INFO_WUNLOCK(); 5384 return (0); 5385 } 5386 } 5387 } 5388check_time_wait: 5389 /* Now what about timed wait ? */ 5390 if (!SCTP_LIST_EMPTY(chain)) { 5391 /* 5392 * Block(s) are present, lets see if we have this tag in the 5393 * list 5394 */ 5395 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5396 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 5397 if (twait_block->vtag_block[i].v_tag == 0) { 5398 /* not used */ 5399 continue; 5400 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire > 5401 now->tv_sec) { 5402 /* Audit expires this guy */ 5403 twait_block->vtag_block[i].tv_sec_at_expire = 0; 5404 twait_block->vtag_block[i].v_tag = 0; 5405 } else if (twait_block->vtag_block[i].v_tag == 5406 tag) { 5407 /* Bad tag, sorry :< */ 5408 SCTP_INP_INFO_WUNLOCK(); 5409 return (0); 5410 } 5411 } 5412 } 5413 } 5414 /* Not found, ok to use the tag */ 5415 SCTP_INP_INFO_WUNLOCK(); 5416 return (1); 5417} 5418 5419 5420static sctp_assoc_t reneged_asoc_ids[256]; 5421static uint8_t reneged_at = 0; 5422 5423 5424static void 5425sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 5426{ 5427 /* 5428 * We must hunt this association for MBUF's past the cumack (i.e. 5429 * out of order data that we can renege on). 5430 */ 5431 struct sctp_association *asoc; 5432 struct sctp_tmit_chunk *chk, *nchk; 5433 uint32_t cumulative_tsn_p1, tsn; 5434 struct sctp_queued_to_read *ctl, *nctl; 5435 int cnt, strmat, gap; 5436 5437 /* We look for anything larger than the cum-ack + 1 */ 5438 5439 SCTP_STAT_INCR(sctps_protocol_drain_calls); 5440 if (sctp_do_drain == 0) { 5441 return; 5442 } 5443 asoc = &stcb->asoc; 5444 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 5445 /* none we can reneg on. */ 5446 return; 5447 } 5448 SCTP_STAT_INCR(sctps_protocol_drains_done); 5449 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 5450 cnt = 0; 5451 /* First look in the re-assembly queue */ 5452 chk = TAILQ_FIRST(&asoc->reasmqueue); 5453 while (chk) { 5454 /* Get the next one */ 5455 nchk = TAILQ_NEXT(chk, sctp_next); 5456 if (compare_with_wrap(chk->rec.data.TSN_seq, 5457 cumulative_tsn_p1, MAX_TSN)) { 5458 /* Yep it is above cum-ack */ 5459 cnt++; 5460 tsn = chk->rec.data.TSN_seq; 5461 if (tsn >= asoc->mapping_array_base_tsn) { 5462 gap = tsn - asoc->mapping_array_base_tsn; 5463 } else { 5464 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 5465 tsn + 1; 5466 } 5467 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 5468 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 5469 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 5470 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5471 if (chk->data) { 5472 sctp_m_freem(chk->data); 5473 chk->data = NULL; 5474 } 5475 sctp_free_a_chunk(stcb, chk); 5476 } 5477 chk = nchk; 5478 } 5479 /* Ok that was fun, now we will drain all the inbound streams? */ 5480 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 5481 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); 5482 while (ctl) { 5483 nctl = TAILQ_NEXT(ctl, next); 5484 if (compare_with_wrap(ctl->sinfo_tsn, 5485 cumulative_tsn_p1, MAX_TSN)) { 5486 /* Yep it is above cum-ack */ 5487 cnt++; 5488 tsn = ctl->sinfo_tsn; 5489 if (tsn >= asoc->mapping_array_base_tsn) { 5490 gap = tsn - 5491 asoc->mapping_array_base_tsn; 5492 } else { 5493 gap = (MAX_TSN - 5494 asoc->mapping_array_base_tsn) + 5495 tsn + 1; 5496 } 5497 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 5498 sctp_ucount_decr(asoc->cnt_on_all_streams); 5499 5500 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, 5501 gap); 5502 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, 5503 ctl, next); 5504 if (ctl->data) { 5505 sctp_m_freem(ctl->data); 5506 ctl->data = NULL; 5507 } 5508 sctp_free_remote_addr(ctl->whoFrom); 5509 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); 5510 SCTP_DECR_READQ_COUNT(); 5511 } 5512 ctl = nctl; 5513 } 5514 } 5515 /* 5516 * Question, should we go through the delivery queue? The only 5517 * reason things are on here is the app not reading OR a p-d-api up. 5518 * An attacker COULD send enough in to initiate the PD-API and then 5519 * send a bunch of stuff to other streams... these would wind up on 5520 * the delivery queue.. and then we would not get to them. But in 5521 * order to do this I then have to back-track and un-deliver 5522 * sequence numbers in streams.. el-yucko. I think for now we will 5523 * NOT look at the delivery queue and leave it to be something to 5524 * consider later. An alternative would be to abort the P-D-API with 5525 * a notification and then deliver the data.... Or another method 5526 * might be to keep track of how many times the situation occurs and 5527 * if we see a possible attack underway just abort the association. 5528 */ 5529#ifdef SCTP_DEBUG 5530 if (cnt) { 5531 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 5532 } 5533#endif 5534 if (cnt) { 5535 /* 5536 * Now do we need to find a new 5537 * asoc->highest_tsn_inside_map? 5538 */ 5539 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) { 5540 gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn; 5541 } else { 5542 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 5543 asoc->highest_tsn_inside_map + 1; 5544 } 5545 if (gap >= (asoc->mapping_array_size << 3)) { 5546 /* 5547 * Something bad happened or cum-ack and high were 5548 * behind the base, but if so earlier checks should 5549 * have found NO data... wierd... we will start at 5550 * end of mapping array. 5551 */ 5552 SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n", 5553 (int)gap, 5554 (int)(asoc->mapping_array_size << 3), 5555 (int)asoc->highest_tsn_inside_map); 5556 gap = asoc->mapping_array_size << 3; 5557 } 5558 while (gap > 0) { 5559 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 5560 /* found the new highest */ 5561 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap; 5562 break; 5563 } 5564 gap--; 5565 } 5566 if (gap == 0) { 5567 /* Nothing left in map */ 5568 memset(asoc->mapping_array, 0, asoc->mapping_array_size); 5569 asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1; 5570 asoc->highest_tsn_inside_map = asoc->cumulative_tsn; 5571 } 5572 asoc->last_revoke_count = cnt; 5573 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 5574 sctp_send_sack(stcb); 5575 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN); 5576 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 5577 reneged_at++; 5578 } 5579 /* 5580 * Another issue, in un-setting the TSN's in the mapping array we 5581 * DID NOT adjust the higest_tsn marker. This will cause one of two 5582 * things to occur. It may cause us to do extra work in checking for 5583 * our mapping array movement. More importantly it may cause us to 5584 * SACK every datagram. This may not be a bad thing though since we 5585 * will recover once we get our cum-ack above and all this stuff we 5586 * dumped recovered. 5587 */ 5588} 5589 5590void 5591sctp_drain() 5592{ 5593 /* 5594 * We must walk the PCB lists for ALL associations here. The system 5595 * is LOW on MBUF's and needs help. This is where reneging will 5596 * occur. We really hope this does NOT happen! 5597 */ 5598 struct sctp_inpcb *inp; 5599 struct sctp_tcb *stcb; 5600 5601 SCTP_INP_INFO_RLOCK(); 5602 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 5603 /* For each endpoint */ 5604 SCTP_INP_RLOCK(inp); 5605 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5606 /* For each association */ 5607 SCTP_TCB_LOCK(stcb); 5608 sctp_drain_mbufs(inp, stcb); 5609 SCTP_TCB_UNLOCK(stcb); 5610 } 5611 SCTP_INP_RUNLOCK(inp); 5612 } 5613 SCTP_INP_INFO_RUNLOCK(); 5614} 5615 5616/* 5617 * start a new iterator 5618 * iterates through all endpoints and associations based on the pcb_state 5619 * flags and asoc_state. "af" (mandatory) is executed for all matching 5620 * assocs and "ef" (optional) is executed when the iterator completes. 5621 * "inpf" (optional) is executed for each new endpoint as it is being 5622 * iterated through. inpe (optional) is called when the inp completes 5623 * its way through all the stcbs. 5624 */ 5625int 5626sctp_initiate_iterator(inp_func inpf, 5627 asoc_func af, 5628 inp_func inpe, 5629 uint32_t pcb_state, 5630 uint32_t pcb_features, 5631 uint32_t asoc_state, 5632 void *argp, 5633 uint32_t argi, 5634 end_func ef, 5635 struct sctp_inpcb *s_inp, 5636 uint8_t chunk_output_off) 5637{ 5638 struct sctp_iterator *it = NULL; 5639 5640 if (af == NULL) { 5641 return (-1); 5642 } 5643 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 5644 SCTP_M_ITER); 5645 if (it == NULL) { 5646 return (ENOMEM); 5647 } 5648 memset(it, 0, sizeof(*it)); 5649 it->function_assoc = af; 5650 it->function_inp = inpf; 5651 if (inpf) 5652 it->done_current_ep = 0; 5653 else 5654 it->done_current_ep = 1; 5655 it->function_atend = ef; 5656 it->pointer = argp; 5657 it->val = argi; 5658 it->pcb_flags = pcb_state; 5659 it->pcb_features = pcb_features; 5660 it->asoc_state = asoc_state; 5661 it->function_inp_end = inpe; 5662 it->no_chunk_output = chunk_output_off; 5663 if (s_inp) { 5664 it->inp = s_inp; 5665 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 5666 } else { 5667 SCTP_INP_INFO_RLOCK(); 5668 it->inp = LIST_FIRST(&sctppcbinfo.listhead); 5669 5670 SCTP_INP_INFO_RUNLOCK(); 5671 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 5672 5673 } 5674 SCTP_IPI_ITERATOR_WQ_LOCK(); 5675 if (it->inp) { 5676 SCTP_INP_INCR_REF(it->inp); 5677 } 5678 TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr); 5679#if defined(SCTP_USE_THREAD_BASED_ITERATOR) 5680 if (sctppcbinfo.iterator_running == 0) { 5681 sctp_wakeup_iterator(); 5682 } 5683 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5684#else 5685 if (it->inp) 5686 SCTP_INP_DECR_REF(it->inp); 5687 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5688 /* Init the timer */ 5689 SCTP_OS_TIMER_INIT(&it->tmr.timer); 5690 /* add to the list of all iterators */ 5691 sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it, 5692 NULL, NULL); 5693#endif 5694 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 5695 return (0); 5696} 5697