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("$FreeBSD$"); 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 50 struct sctp_epinfo sctppcbinfo; 51 52 /* FIX: we don't handle multiple link local scopes */ 53 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 54 int 55 SCTP6_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 67 void 68 sctp_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 */ 131 132 struct sctp_vrf * 133 sctp_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 } 178 179 180 struct sctp_ifn * 181 sctp_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 } 201 202 203 204 struct sctp_vrf * 205 sctp_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 } 218 219 void 220 sctp_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 } 232 233 void 234 sctp_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 } 248 249 void 250 sctp_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 } 259 260 261 void 262 sctp_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 } 276 277 static void 278 sctp_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 } 298 299 300 struct sctp_ifa * 301 sctp_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 } 516 517 void 518 sctp_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 574 575 out_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 } 612 613 614 615 static struct sctp_tcb * 616 sctp_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 */ 787 788 struct sctp_tcb * 789 sctp_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 } 986 null_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 1002 struct sctp_tcb * 1003 sctp_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 1093 static struct sctp_inpcb * 1094 sctp_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 1234 struct sctp_inpcb * 1235 sctp_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 */ 1313 struct sctp_tcb * 1314 sctp_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 */ 1366 static struct sctp_tcb * 1367 sctp_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 1442 static struct sctp_tcb * 1443 sctp_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 */ 1525 struct sctp_tcb * 1526 sctp_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 */ 1654 struct sctp_tcb * 1655 sctp_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 */ 1773 int 1774 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 1775 { 1776 /* 1777 * we get called when a new endpoint starts up. We need to allocate 1778 * the sctp_inpcb structure from the zone and init it. Mark it as 1779 * unbound and find a port that we can use as an ephemeral with 1780 * INADDR_ANY. If the user binds later no problem we can then add in 1781 * the specific addresses. And setup the default parameters for the 1782 * EP. 1783 */ 1784 int i, error; 1785 struct sctp_inpcb *inp; 1786 struct sctp_pcb *m; 1787 struct timeval time; 1788 sctp_sharedkey_t *null_key; 1789 1790 error = 0; 1791 1792 SCTP_INP_INFO_WLOCK(); 1793 inp = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_ep, struct sctp_inpcb); 1794 if (inp == NULL) { 1795 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 1796 SCTP_INP_INFO_WUNLOCK(); 1797 return (ENOBUFS); 1798 } 1799 /* zap it */ 1800 bzero(inp, sizeof(*inp)); 1801 1802 /* bump generations */ 1803 /* setup socket pointers */ 1804 inp->sctp_socket = so; 1805 inp->ip_inp.inp.inp_socket = so; 1806 1807 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 1808 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 1809 1810 #ifdef IPSEC 1811 { 1812 struct inpcbpolicy *pcb_sp = NULL; 1813 1814 error = ipsec_init_policy(so, &pcb_sp); 1815 /* Arrange to share the policy */ 1816 inp->ip_inp.inp.inp_sp = pcb_sp; 1817 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 1818 } 1819 if (error != 0) { 1820 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1821 SCTP_INP_INFO_WUNLOCK(); 1822 return error; 1823 } 1824 #endif /* IPSEC */ 1825 SCTP_INCR_EP_COUNT(); 1826 inp->ip_inp.inp.inp_ip_ttl = ip_defttl; 1827 SCTP_INP_INFO_WUNLOCK(); 1828 1829 so->so_pcb = (caddr_t)inp; 1830 1831 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 1832 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 1833 /* UDP style socket */ 1834 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 1835 SCTP_PCB_FLAGS_UNBOUND); 1836 /* Be sure it is NON-BLOCKING IO for UDP */ 1837 /* SCTP_SET_SO_NBIO(so); */ 1838 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 1839 /* TCP style socket */ 1840 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 1841 SCTP_PCB_FLAGS_UNBOUND); 1842 /* Be sure we have blocking IO by default */ 1843 SCTP_CLEAR_SO_NBIO(so); 1844 } else { 1845 /* 1846 * unsupported socket type (RAW, etc)- in case we missed it 1847 * in protosw 1848 */ 1849 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1850 return (EOPNOTSUPP); 1851 } 1852 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 1853 1854 inp->sctp_tcbhash = SCTP_HASH_INIT(sctp_pcbtblsize, 1855 &inp->sctp_hashmark); 1856 if (inp->sctp_tcbhash == NULL) { 1857 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 1858 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 1859 return (ENOBUFS); 1860 } 1861 inp->def_vrf_id = vrf_id; 1862 1863 SCTP_INP_INFO_WLOCK(); 1864 SCTP_INP_LOCK_INIT(inp); 1865 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 1866 SCTP_INP_READ_INIT(inp); 1867 SCTP_ASOC_CREATE_LOCK_INIT(inp); 1868 /* lock the new ep */ 1869 SCTP_INP_WLOCK(inp); 1870 1871 /* add it to the info area */ 1872 LIST_INSERT_HEAD(&sctppcbinfo.listhead, inp, sctp_list); 1873 SCTP_INP_INFO_WUNLOCK(); 1874 1875 TAILQ_INIT(&inp->read_queue); 1876 LIST_INIT(&inp->sctp_addr_list); 1877 1878 LIST_INIT(&inp->sctp_asoc_list); 1879 1880 #ifdef SCTP_TRACK_FREED_ASOCS 1881 /* TEMP CODE */ 1882 LIST_INIT(&inp->sctp_asoc_free_list); 1883 #endif 1884 /* Init the timer structure for signature change */ 1885 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 1886 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 1887 1888 /* now init the actual endpoint default data */ 1889 m = &inp->sctp_ep; 1890 1891 /* setup the base timeout information */ 1892 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 1893 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 1894 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(sctp_delayed_sack_time_default); 1895 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(sctp_heartbeat_interval_default); 1896 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(sctp_pmtu_raise_time_default); 1897 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(sctp_shutdown_guard_time_default); 1898 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(sctp_secret_lifetime_default); 1899 /* all max/min max are in ms */ 1900 m->sctp_maxrto = sctp_rto_max_default; 1901 m->sctp_minrto = sctp_rto_min_default; 1902 m->initial_rto = sctp_rto_initial_default; 1903 m->initial_init_rto_max = sctp_init_rto_max_default; 1904 m->sctp_sack_freq = sctp_sack_freq_default; 1905 1906 m->max_open_streams_intome = MAX_SCTP_STREAMS; 1907 1908 m->max_init_times = sctp_init_rtx_max_default; 1909 m->max_send_times = sctp_assoc_rtx_max_default; 1910 m->def_net_failure = sctp_path_rtx_max_default; 1911 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 1912 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 1913 m->max_burst = sctp_max_burst_default; 1914 if ((sctp_default_cc_module >= SCTP_CC_RFC2581) && 1915 (sctp_default_cc_module <= SCTP_CC_HTCP)) { 1916 m->sctp_default_cc_module = sctp_default_cc_module; 1917 } else { 1918 /* sysctl done with invalid value, set to 2581 */ 1919 m->sctp_default_cc_module = SCTP_CC_RFC2581; 1920 } 1921 /* number of streams to pre-open on a association */ 1922 m->pre_open_stream_count = sctp_nr_outgoing_streams_default; 1923 1924 /* Add adaptation cookie */ 1925 m->adaptation_layer_indicator = 0x504C5253; 1926 1927 /* seed random number generator */ 1928 m->random_counter = 1; 1929 m->store_at = SCTP_SIGNATURE_SIZE; 1930 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 1931 sctp_fill_random_store(m); 1932 1933 /* Minimum cookie size */ 1934 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 1935 sizeof(struct sctp_state_cookie); 1936 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 1937 1938 /* Setup the initial secret */ 1939 (void)SCTP_GETTIME_TIMEVAL(&time); 1940 m->time_of_secret_change = time.tv_sec; 1941 1942 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 1943 m->secret_key[0][i] = sctp_select_initial_TSN(m); 1944 } 1945 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 1946 1947 /* How long is a cookie good for ? */ 1948 m->def_cookie_life = MSEC_TO_TICKS(sctp_valid_cookie_life_default); 1949 /* 1950 * Initialize authentication parameters 1951 */ 1952 m->local_hmacs = sctp_default_supported_hmaclist(); 1953 m->local_auth_chunks = sctp_alloc_chunklist(); 1954 sctp_auth_set_default_chunks(m->local_auth_chunks); 1955 LIST_INIT(&m->shared_keys); 1956 /* add default NULL key as key id 0 */ 1957 null_key = sctp_alloc_sharedkey(); 1958 sctp_insert_sharedkey(&m->shared_keys, null_key); 1959 SCTP_INP_WUNLOCK(inp); 1960 #ifdef SCTP_LOG_CLOSING 1961 sctp_log_closing(inp, NULL, 12); 1962 #endif 1963 return (error); 1964 } 1965 1966 1967 void 1968 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 1969 struct sctp_tcb *stcb) 1970 { 1971 struct sctp_nets *net; 1972 uint16_t lport, rport; 1973 struct sctppcbhead *head; 1974 struct sctp_laddr *laddr, *oladdr; 1975 1976 SCTP_TCB_UNLOCK(stcb); 1977 SCTP_INP_INFO_WLOCK(); 1978 SCTP_INP_WLOCK(old_inp); 1979 SCTP_INP_WLOCK(new_inp); 1980 SCTP_TCB_LOCK(stcb); 1981 1982 new_inp->sctp_ep.time_of_secret_change = 1983 old_inp->sctp_ep.time_of_secret_change; 1984 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 1985 sizeof(old_inp->sctp_ep.secret_key)); 1986 new_inp->sctp_ep.current_secret_number = 1987 old_inp->sctp_ep.current_secret_number; 1988 new_inp->sctp_ep.last_secret_number = 1989 old_inp->sctp_ep.last_secret_number; 1990 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 1991 1992 /* make it so new data pours into the new socket */ 1993 stcb->sctp_socket = new_inp->sctp_socket; 1994 stcb->sctp_ep = new_inp; 1995 1996 /* Copy the port across */ 1997 lport = new_inp->sctp_lport = old_inp->sctp_lport; 1998 rport = stcb->rport; 1999 /* Pull the tcb from the old association */ 2000 LIST_REMOVE(stcb, sctp_tcbhash); 2001 LIST_REMOVE(stcb, sctp_tcblist); 2002 2003 /* Now insert the new_inp into the TCP connected hash */ 2004 head = &sctppcbinfo.sctp_tcpephash[SCTP_PCBHASH_ALLADDR((lport + rport), 2005 sctppcbinfo.hashtcpmark)]; 2006 2007 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2008 /* Its safe to access */ 2009 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2010 2011 /* Now move the tcb into the endpoint list */ 2012 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2013 /* 2014 * Question, do we even need to worry about the ep-hash since we 2015 * only have one connection? Probably not :> so lets get rid of it 2016 * and not suck up any kernel memory in that. 2017 */ 2018 2019 /* Ok. Let's restart timer. */ 2020 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2021 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2022 stcb, net); 2023 } 2024 2025 SCTP_INP_INFO_WUNLOCK(); 2026 if (new_inp->sctp_tcbhash != NULL) { 2027 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2028 new_inp->sctp_tcbhash = NULL; 2029 } 2030 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2031 /* Subset bound, so copy in the laddr list from the old_inp */ 2032 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2033 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 2034 if (laddr == NULL) { 2035 /* 2036 * Gak, what can we do? This assoc is really 2037 * HOSED. We probably should send an abort 2038 * here. 2039 */ 2040 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2041 continue; 2042 } 2043 SCTP_INCR_LADDR_COUNT(); 2044 bzero(laddr, sizeof(*laddr)); 2045 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2046 laddr->ifa = oladdr->ifa; 2047 atomic_add_int(&laddr->ifa->refcount, 1); 2048 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2049 sctp_nxt_addr); 2050 new_inp->laddr_count++; 2051 } 2052 } 2053 /* 2054 * Now any running timers need to be adjusted since we really don't 2055 * care if they are running or not just blast in the new_inp into 2056 * all of them. 2057 */ 2058 2059 stcb->asoc.hb_timer.ep = (void *)new_inp; 2060 stcb->asoc.dack_timer.ep = (void *)new_inp; 2061 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2062 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2063 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2064 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2065 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2066 /* now what about the nets? */ 2067 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2068 net->pmtu_timer.ep = (void *)new_inp; 2069 net->rxt_timer.ep = (void *)new_inp; 2070 net->fr_timer.ep = (void *)new_inp; 2071 } 2072 SCTP_INP_WUNLOCK(new_inp); 2073 SCTP_INP_WUNLOCK(old_inp); 2074 } 2075 2076 static int 2077 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 2078 { 2079 struct sctppcbhead *head; 2080 struct sctp_inpcb *t_inp; 2081 int fnd; 2082 2083 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 2084 sctppcbinfo.hashmark)]; 2085 LIST_FOREACH(t_inp, head, sctp_hash) { 2086 if (t_inp->sctp_lport != lport) { 2087 continue; 2088 } 2089 /* is it in the VRF in question */ 2090 fnd = 0; 2091 if (t_inp->def_vrf_id == vrf_id) 2092 fnd = 1; 2093 if (!fnd) 2094 continue; 2095 2096 /* This one is in use. */ 2097 /* check the v6/v4 binding issue */ 2098 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2099 SCTP_IPV6_V6ONLY(t_inp)) { 2100 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2101 /* collision in V6 space */ 2102 return (1); 2103 } else { 2104 /* inp is BOUND_V4 no conflict */ 2105 continue; 2106 } 2107 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 2108 /* t_inp is bound v4 and v6, conflict always */ 2109 return (1); 2110 } else { 2111 /* t_inp is bound only V4 */ 2112 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 2113 SCTP_IPV6_V6ONLY(inp)) { 2114 /* no conflict */ 2115 continue; 2116 } 2117 /* else fall through to conflict */ 2118 } 2119 return (1); 2120 } 2121 return (0); 2122 } 2123 2124 2125 2126 int 2127 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2128 struct thread *p) 2129 { 2130 /* bind a ep to a socket address */ 2131 struct sctppcbhead *head; 2132 struct sctp_inpcb *inp, *inp_tmp; 2133 struct inpcb *ip_inp; 2134 int bindall; 2135 int prison = 0; 2136 uint16_t lport; 2137 int error; 2138 uint32_t vrf_id; 2139 2140 lport = 0; 2141 error = 0; 2142 bindall = 1; 2143 inp = (struct sctp_inpcb *)so->so_pcb; 2144 ip_inp = (struct inpcb *)so->so_pcb; 2145 #ifdef SCTP_DEBUG 2146 if (addr) { 2147 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2148 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2149 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2150 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2151 } 2152 #endif 2153 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2154 /* already did a bind, subsequent binds NOT allowed ! */ 2155 return (EINVAL); 2156 } 2157 if (jailed(p->td_ucred)) { 2158 prison = 1; 2159 } 2160 if (addr != NULL) { 2161 if (addr->sa_family == AF_INET) { 2162 struct sockaddr_in *sin; 2163 2164 /* IPV6_V6ONLY socket? */ 2165 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2166 return (EINVAL); 2167 } 2168 if (addr->sa_len != sizeof(*sin)) 2169 return (EINVAL); 2170 2171 sin = (struct sockaddr_in *)addr; 2172 lport = sin->sin_port; 2173 if (prison) { 2174 /* 2175 * For INADDR_ANY and LOOPBACK the 2176 * prison_ip() call will tranmute the ip 2177 * address to the proper valie. 2178 */ 2179 if (prison_ip(p->td_ucred, 0, &sin->sin_addr.s_addr)) 2180 return (EINVAL); 2181 } 2182 if (sin->sin_addr.s_addr != INADDR_ANY) { 2183 bindall = 0; 2184 } 2185 } else if (addr->sa_family == AF_INET6) { 2186 /* Only for pure IPv6 Address. (No IPv4 Mapped!) */ 2187 struct sockaddr_in6 *sin6; 2188 2189 sin6 = (struct sockaddr_in6 *)addr; 2190 2191 if (addr->sa_len != sizeof(*sin6)) 2192 return (EINVAL); 2193 2194 lport = sin6->sin6_port; 2195 /* 2196 * Jail checks for IPv6 should go HERE! i.e. add the 2197 * prison_ip() equivilant in this postion to 2198 * transmute the addresses to the proper one jailed. 2199 */ 2200 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2201 bindall = 0; 2202 /* KAME hack: embed scopeid */ 2203 if (sa6_embedscope(sin6, ip6_use_defzone) != 0) 2204 return (EINVAL); 2205 } 2206 /* this must be cleared for ifa_ifwithaddr() */ 2207 sin6->sin6_scope_id = 0; 2208 } else { 2209 return (EAFNOSUPPORT); 2210 } 2211 } 2212 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2213 vrf_id = inp->def_vrf_id; 2214 2215 SCTP_INP_INFO_WLOCK(); 2216 SCTP_INP_WLOCK(inp); 2217 /* increase our count due to the unlock we do */ 2218 SCTP_INP_INCR_REF(inp); 2219 if (lport) { 2220 /* 2221 * Did the caller specify a port? if so we must see if a ep 2222 * already has this one bound. 2223 */ 2224 /* got to be root to get at low ports */ 2225 if (ntohs(lport) < IPPORT_RESERVED) { 2226 if (p && (error = 2227 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2228 )) { 2229 SCTP_INP_DECR_REF(inp); 2230 SCTP_INP_WUNLOCK(inp); 2231 SCTP_INP_INFO_WUNLOCK(); 2232 return (error); 2233 } 2234 } 2235 if (p == NULL) { 2236 SCTP_INP_DECR_REF(inp); 2237 SCTP_INP_WUNLOCK(inp); 2238 SCTP_INP_INFO_WUNLOCK(); 2239 return (error); 2240 } 2241 SCTP_INP_WUNLOCK(inp); 2242 if (bindall) { 2243 vrf_id = inp->def_vrf_id; 2244 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2245 if (inp_tmp != NULL) { 2246 /* 2247 * lock guy returned and lower count note 2248 * that we are not bound so inp_tmp should 2249 * NEVER be inp. And it is this inp 2250 * (inp_tmp) that gets the reference bump, 2251 * so we must lower it. 2252 */ 2253 SCTP_INP_DECR_REF(inp_tmp); 2254 SCTP_INP_DECR_REF(inp); 2255 /* unlock info */ 2256 SCTP_INP_INFO_WUNLOCK(); 2257 return (EADDRINUSE); 2258 } 2259 } else { 2260 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2261 if (inp_tmp != NULL) { 2262 /* 2263 * lock guy returned and lower count note 2264 * that we are not bound so inp_tmp should 2265 * NEVER be inp. And it is this inp 2266 * (inp_tmp) that gets the reference bump, 2267 * so we must lower it. 2268 */ 2269 SCTP_INP_DECR_REF(inp_tmp); 2270 SCTP_INP_DECR_REF(inp); 2271 /* unlock info */ 2272 SCTP_INP_INFO_WUNLOCK(); 2273 return (EADDRINUSE); 2274 } 2275 } 2276 SCTP_INP_WLOCK(inp); 2277 if (bindall) { 2278 /* verify that no lport is not used by a singleton */ 2279 if (sctp_isport_inuse(inp, lport, vrf_id)) { 2280 /* Sorry someone already has this one bound */ 2281 SCTP_INP_DECR_REF(inp); 2282 SCTP_INP_WUNLOCK(inp); 2283 SCTP_INP_INFO_WUNLOCK(); 2284 return (EADDRINUSE); 2285 } 2286 } 2287 } else { 2288 uint16_t first, last, candidate; 2289 uint16_t count; 2290 int done; 2291 2292 if (ip_inp->inp_flags & INP_HIGHPORT) { 2293 first = ipport_hifirstauto; 2294 last = ipport_hilastauto; 2295 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2296 if (p && (error = 2297 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2298 )) { 2299 SCTP_INP_DECR_REF(inp); 2300 SCTP_INP_WUNLOCK(inp); 2301 SCTP_INP_INFO_WUNLOCK(); 2302 return (error); 2303 } 2304 first = ipport_lowfirstauto; 2305 last = ipport_lowlastauto; 2306 } else { 2307 first = ipport_firstauto; 2308 last = ipport_lastauto; 2309 } 2310 if (first > last) { 2311 uint16_t temp; 2312 2313 temp = first; 2314 first = last; 2315 last = temp; 2316 } 2317 count = last - first + 1; /* number of candidates */ 2318 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2319 2320 done = 0; 2321 while (!done) { 2322 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == 0) { 2323 done = 1; 2324 } 2325 if (!done) { 2326 if (--count == 0) { 2327 SCTP_INP_DECR_REF(inp); 2328 SCTP_INP_WUNLOCK(inp); 2329 SCTP_INP_INFO_WUNLOCK(); 2330 return (EADDRINUSE); 2331 } 2332 if (candidate == last) 2333 candidate = first; 2334 else 2335 candidate = candidate + 1; 2336 } 2337 } 2338 lport = htons(candidate); 2339 } 2340 SCTP_INP_DECR_REF(inp); 2341 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2342 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2343 /* 2344 * this really should not happen. The guy did a non-blocking 2345 * bind and then did a close at the same time. 2346 */ 2347 SCTP_INP_WUNLOCK(inp); 2348 SCTP_INP_INFO_WUNLOCK(); 2349 return (EINVAL); 2350 } 2351 /* ok we look clear to give out this port, so lets setup the binding */ 2352 if (bindall) { 2353 /* binding to all addresses, so just set in the proper flags */ 2354 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2355 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2356 /* set the automatic addr changes from kernel flag */ 2357 if (sctp_auto_asconf == 0) { 2358 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2359 } else { 2360 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2361 } 2362 } else { 2363 /* 2364 * bind specific, make sure flags is off and add a new 2365 * address structure to the sctp_addr_list inside the ep 2366 * structure. 2367 * 2368 * We will need to allocate one and insert it at the head. The 2369 * socketopt call can just insert new addresses in there as 2370 * well. It will also have to do the embed scope kame hack 2371 * too (before adding). 2372 */ 2373 struct sctp_ifa *ifa; 2374 struct sockaddr_storage store_sa; 2375 2376 memset(&store_sa, 0, sizeof(store_sa)); 2377 if (addr->sa_family == AF_INET) { 2378 struct sockaddr_in *sin; 2379 2380 sin = (struct sockaddr_in *)&store_sa; 2381 memcpy(sin, addr, sizeof(struct sockaddr_in)); 2382 sin->sin_port = 0; 2383 } else if (addr->sa_family == AF_INET6) { 2384 struct sockaddr_in6 *sin6; 2385 2386 sin6 = (struct sockaddr_in6 *)&store_sa; 2387 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 2388 sin6->sin6_port = 0; 2389 } 2390 /* 2391 * first find the interface with the bound address need to 2392 * zero out the port to find the address! yuck! can't do 2393 * this earlier since need port for sctp_pcb_findep() 2394 */ 2395 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 2396 vrf_id, 0); 2397 if (ifa == NULL) { 2398 /* Can't find an interface with that address */ 2399 SCTP_INP_WUNLOCK(inp); 2400 SCTP_INP_INFO_WUNLOCK(); 2401 return (EADDRNOTAVAIL); 2402 } 2403 if (addr->sa_family == AF_INET6) { 2404 /* GAK, more FIXME IFA lock? */ 2405 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2406 /* Can't bind a non-existent addr. */ 2407 SCTP_INP_WUNLOCK(inp); 2408 SCTP_INP_INFO_WUNLOCK(); 2409 return (EINVAL); 2410 } 2411 } 2412 /* we're not bound all */ 2413 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 2414 /* allow bindx() to send ASCONF's for binding changes */ 2415 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2416 /* clear automatic addr changes from kernel flag */ 2417 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2418 2419 /* add this address to the endpoint list */ 2420 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 2421 if (error != 0) { 2422 SCTP_INP_WUNLOCK(inp); 2423 SCTP_INP_INFO_WUNLOCK(); 2424 return (error); 2425 } 2426 inp->laddr_count++; 2427 } 2428 /* find the bucket */ 2429 head = &sctppcbinfo.sctp_ephash[SCTP_PCBHASH_ALLADDR(lport, 2430 sctppcbinfo.hashmark)]; 2431 /* put it in the bucket */ 2432 LIST_INSERT_HEAD(head, inp, sctp_hash); 2433 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d\n", 2434 head, ntohs(lport)); 2435 /* set in the port */ 2436 inp->sctp_lport = lport; 2437 2438 /* turn off just the unbound flag */ 2439 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2440 SCTP_INP_WUNLOCK(inp); 2441 SCTP_INP_INFO_WUNLOCK(); 2442 return (0); 2443 } 2444 2445 2446 static void 2447 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next) 2448 { 2449 struct sctp_iterator *it; 2450 2451 /* 2452 * We enter with the only the ITERATOR_LOCK in place and a write 2453 * lock on the inp_info stuff. 2454 */ 2455 2456 /* 2457 * Go through all iterators, we must do this since it is possible 2458 * that some iterator does NOT have the lock, but is waiting for it. 2459 * And the one that had the lock has either moved in the last 2460 * iteration or we just cleared it above. We need to find all of 2461 * those guys. The list of iterators should never be very big 2462 * though. 2463 */ 2464 TAILQ_FOREACH(it, &sctppcbinfo.iteratorhead, sctp_nxt_itr) { 2465 if (it == inp->inp_starting_point_for_iterator) 2466 /* skip this guy, he's special */ 2467 continue; 2468 if (it->inp == inp) { 2469 /* 2470 * This is tricky and we DON'T lock the iterator. 2471 * Reason is he's running but waiting for me since 2472 * inp->inp_starting_point_for_iterator has the lock 2473 * on me (the guy above we skipped). This tells us 2474 * its is not running but waiting for 2475 * inp->inp_starting_point_for_iterator to be 2476 * released by the guy that does have our INP in a 2477 * lock. 2478 */ 2479 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 2480 it->inp = NULL; 2481 it->stcb = NULL; 2482 } else { 2483 /* set him up to do the next guy not me */ 2484 it->inp = inp_next; 2485 it->stcb = NULL; 2486 } 2487 } 2488 } 2489 it = inp->inp_starting_point_for_iterator; 2490 if (it) { 2491 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 2492 it->inp = NULL; 2493 } else { 2494 it->inp = inp_next; 2495 } 2496 it->stcb = NULL; 2497 } 2498 } 2499 2500 /* release sctp_inpcb unbind the port */ 2501 void 2502 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 2503 { 2504 /* 2505 * Here we free a endpoint. We must find it (if it is in the Hash 2506 * table) and remove it from there. Then we must also find it in the 2507 * overall list and remove it from there. After all removals are 2508 * complete then any timer has to be stopped. Then start the actual 2509 * freeing. a) Any local lists. b) Any associations. c) The hash of 2510 * all associations. d) finally the ep itself. 2511 */ 2512 struct sctp_pcb *m; 2513 struct sctp_inpcb *inp_save; 2514 struct sctp_tcb *asoc, *nasoc; 2515 struct sctp_laddr *laddr, *nladdr; 2516 struct inpcb *ip_pcb; 2517 struct socket *so; 2518 2519 struct sctp_queued_to_read *sq; 2520 2521 2522 int cnt; 2523 sctp_sharedkey_t *shared_key; 2524 2525 2526 #ifdef SCTP_LOG_CLOSING 2527 sctp_log_closing(inp, NULL, 0); 2528 #endif 2529 2530 SCTP_ITERATOR_LOCK(); 2531 so = inp->sctp_socket; 2532 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2533 /* been here before.. eeks.. get out of here */ 2534 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 2535 SCTP_ITERATOR_UNLOCK(); 2536 #ifdef SCTP_LOG_CLOSING 2537 sctp_log_closing(inp, NULL, 1); 2538 #endif 2539 return; 2540 } 2541 SCTP_ASOC_CREATE_LOCK(inp); 2542 SCTP_INP_INFO_WLOCK(); 2543 2544 SCTP_INP_WLOCK(inp); 2545 /* First time through we have the socket lock, after that no more. */ 2546 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 2547 /* 2548 * Once we are in we can remove the flag from = 1 is only 2549 * passed from the actual closing routines that are called 2550 * via the sockets layer. 2551 */ 2552 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 2553 } 2554 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 2555 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 2556 2557 if (inp->control) { 2558 sctp_m_freem(inp->control); 2559 inp->control = NULL; 2560 } 2561 if (inp->pkt) { 2562 sctp_m_freem(inp->pkt); 2563 inp->pkt = NULL; 2564 } 2565 m = &inp->sctp_ep; 2566 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 2567 * here but I will be nice :> (i.e. 2568 * ip_pcb = ep;) */ 2569 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 2570 int cnt_in_sd; 2571 2572 cnt_in_sd = 0; 2573 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 2574 asoc = nasoc) { 2575 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2576 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2577 /* Skip guys being freed */ 2578 asoc->sctp_socket = NULL; 2579 cnt_in_sd++; 2580 continue; 2581 } 2582 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 2583 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 2584 /* 2585 * If we have data in queue, we don't want 2586 * to just free since the app may have done, 2587 * send()/close or connect/send/close. And 2588 * it wants the data to get across first. 2589 */ 2590 if (asoc->asoc.total_output_queue_size == 0) { 2591 /* 2592 * Just abandon things in the front 2593 * states 2594 */ 2595 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_2); 2596 continue; 2597 } 2598 } 2599 SCTP_TCB_LOCK(asoc); 2600 /* Disconnect the socket please */ 2601 asoc->sctp_socket = NULL; 2602 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 2603 if ((asoc->asoc.size_on_reasm_queue > 0) || 2604 (asoc->asoc.control_pdapi) || 2605 (asoc->asoc.size_on_all_streams > 0) || 2606 (so && (so->so_rcv.sb_cc > 0)) 2607 ) { 2608 /* Left with Data unread */ 2609 struct mbuf *op_err; 2610 2611 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2612 0, M_DONTWAIT, 1, MT_DATA); 2613 if (op_err) { 2614 /* Fill in the user initiated abort */ 2615 struct sctp_paramhdr *ph; 2616 uint32_t *ippp; 2617 2618 SCTP_BUF_LEN(op_err) = 2619 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 2620 ph = mtod(op_err, 2621 struct sctp_paramhdr *); 2622 ph->param_type = htons( 2623 SCTP_CAUSE_USER_INITIATED_ABT); 2624 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2625 ippp = (uint32_t *) (ph + 1); 2626 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 2627 } 2628 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 2629 sctp_send_abort_tcb(asoc, op_err); 2630 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2631 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2632 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2633 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2634 } 2635 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4); 2636 continue; 2637 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 2638 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 2639 (asoc->asoc.stream_queue_cnt == 0) 2640 ) { 2641 if (asoc->asoc.locked_on_sending) { 2642 goto abort_anyway; 2643 } 2644 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 2645 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 2646 /* 2647 * there is nothing queued to send, 2648 * so I send shutdown 2649 */ 2650 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 2651 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2652 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2653 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2654 } 2655 asoc->asoc.state = SCTP_STATE_SHUTDOWN_SENT; 2656 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 2657 asoc->asoc.primary_destination); 2658 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 2659 asoc->asoc.primary_destination); 2660 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR); 2661 } 2662 } else { 2663 /* mark into shutdown pending */ 2664 struct sctp_stream_queue_pending *sp; 2665 2666 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 2667 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 2668 asoc->asoc.primary_destination); 2669 if (asoc->asoc.locked_on_sending) { 2670 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 2671 sctp_streamhead); 2672 if (sp == NULL) { 2673 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 2674 asoc->asoc.locked_on_sending, 2675 asoc->asoc.locked_on_sending->stream_no); 2676 } else { 2677 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 2678 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 2679 } 2680 } 2681 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 2682 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 2683 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 2684 struct mbuf *op_err; 2685 2686 abort_anyway: 2687 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2688 0, M_DONTWAIT, 1, MT_DATA); 2689 if (op_err) { 2690 /* 2691 * Fill in the user 2692 * initiated abort 2693 */ 2694 struct sctp_paramhdr *ph; 2695 uint32_t *ippp; 2696 2697 SCTP_BUF_LEN(op_err) = 2698 (sizeof(struct sctp_paramhdr) + 2699 sizeof(uint32_t)); 2700 ph = mtod(op_err, 2701 struct sctp_paramhdr *); 2702 ph->param_type = htons( 2703 SCTP_CAUSE_USER_INITIATED_ABT); 2704 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2705 ippp = (uint32_t *) (ph + 1); 2706 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 2707 } 2708 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 2709 sctp_send_abort_tcb(asoc, op_err); 2710 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2711 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2712 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2713 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2714 } 2715 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_6); 2716 continue; 2717 } 2718 } 2719 cnt_in_sd++; 2720 SCTP_TCB_UNLOCK(asoc); 2721 } 2722 /* now is there some left in our SHUTDOWN state? */ 2723 if (cnt_in_sd) { 2724 SCTP_INP_WUNLOCK(inp); 2725 SCTP_ASOC_CREATE_UNLOCK(inp); 2726 SCTP_INP_INFO_WUNLOCK(); 2727 SCTP_ITERATOR_UNLOCK(); 2728 #ifdef SCTP_LOG_CLOSING 2729 sctp_log_closing(inp, NULL, 2); 2730 #endif 2731 return; 2732 } 2733 } 2734 inp->sctp_socket = NULL; 2735 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 2736 SCTP_PCB_FLAGS_UNBOUND) { 2737 /* 2738 * ok, this guy has been bound. It's port is somewhere in 2739 * the sctppcbinfo hash table. Remove it! 2740 */ 2741 LIST_REMOVE(inp, sctp_hash); 2742 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 2743 } 2744 /* 2745 * If there is a timer running to kill us, forget it, since it may 2746 * have a contest on the INP lock.. which would cause us to die ... 2747 */ 2748 cnt = 0; 2749 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 2750 asoc = nasoc) { 2751 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2752 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2753 cnt++; 2754 continue; 2755 } 2756 /* Free associations that are NOT killing us */ 2757 SCTP_TCB_LOCK(asoc); 2758 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 2759 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 2760 struct mbuf *op_err; 2761 uint32_t *ippp; 2762 2763 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 2764 0, M_DONTWAIT, 1, MT_DATA); 2765 if (op_err) { 2766 /* Fill in the user initiated abort */ 2767 struct sctp_paramhdr *ph; 2768 2769 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 2770 sizeof(uint32_t)); 2771 ph = mtod(op_err, struct sctp_paramhdr *); 2772 ph->param_type = htons( 2773 SCTP_CAUSE_USER_INITIATED_ABT); 2774 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 2775 ippp = (uint32_t *) (ph + 1); 2776 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 2777 2778 } 2779 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 2780 sctp_send_abort_tcb(asoc, op_err); 2781 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 2782 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2783 cnt++; 2784 SCTP_TCB_UNLOCK(asoc); 2785 continue; 2786 } 2787 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 2788 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 2789 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 2790 } 2791 sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8); 2792 } 2793 if (cnt) { 2794 /* Ok we have someone out there that will kill us */ 2795 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2796 SCTP_INP_WUNLOCK(inp); 2797 SCTP_ASOC_CREATE_UNLOCK(inp); 2798 SCTP_INP_INFO_WUNLOCK(); 2799 SCTP_ITERATOR_UNLOCK(); 2800 #ifdef SCTP_LOG_CLOSING 2801 sctp_log_closing(inp, NULL, 3); 2802 #endif 2803 return; 2804 } 2805 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 2806 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2807 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 2808 SCTP_INP_WUNLOCK(inp); 2809 SCTP_ASOC_CREATE_UNLOCK(inp); 2810 SCTP_INP_INFO_WUNLOCK(); 2811 SCTP_ITERATOR_UNLOCK(); 2812 #ifdef SCTP_LOG_CLOSING 2813 sctp_log_closing(inp, NULL, 4); 2814 #endif 2815 return; 2816 } 2817 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2818 inp->sctp_ep.signature_change.type = 0; 2819 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 2820 2821 #ifdef SCTP_LOG_CLOSING 2822 sctp_log_closing(inp, NULL, 5); 2823 #endif 2824 2825 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 2826 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE; 2827 /* Clear the read queue */ 2828 /* sa_ignore FREED_MEMORY */ 2829 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { 2830 /* Its only abandoned if it had data left */ 2831 if (sq->length) 2832 SCTP_STAT_INCR(sctps_left_abandon); 2833 2834 TAILQ_REMOVE(&inp->read_queue, sq, next); 2835 sctp_free_remote_addr(sq->whoFrom); 2836 if (so) 2837 so->so_rcv.sb_cc -= sq->length; 2838 if (sq->data) { 2839 sctp_m_freem(sq->data); 2840 sq->data = NULL; 2841 } 2842 /* 2843 * no need to free the net count, since at this point all 2844 * assoc's are gone. 2845 */ 2846 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); 2847 SCTP_DECR_READQ_COUNT(); 2848 } 2849 /* Now the sctp_pcb things */ 2850 /* 2851 * free each asoc if it is not already closed/free. we can't use the 2852 * macro here since le_next will get freed as part of the 2853 * sctp_free_assoc() call. 2854 */ 2855 cnt = 0; 2856 if (so) { 2857 #ifdef IPSEC 2858 ipsec4_delete_pcbpolicy(ip_pcb); 2859 #endif /* IPSEC */ 2860 2861 /* Unlocks not needed since the socket is gone now */ 2862 } 2863 if (ip_pcb->inp_options) { 2864 (void)sctp_m_free(ip_pcb->inp_options); 2865 ip_pcb->inp_options = 0; 2866 } 2867 if (ip_pcb->inp_moptions) { 2868 inp_freemoptions(ip_pcb->inp_moptions); 2869 ip_pcb->inp_moptions = 0; 2870 } 2871 #ifdef INET6 2872 if (ip_pcb->inp_vflag & INP_IPV6) { 2873 struct in6pcb *in6p; 2874 2875 in6p = (struct in6pcb *)inp; 2876 ip6_freepcbopts(in6p->in6p_outputopts); 2877 } 2878 #endif /* INET6 */ 2879 ip_pcb->inp_vflag = 0; 2880 /* free up authentication fields */ 2881 if (inp->sctp_ep.local_auth_chunks != NULL) 2882 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 2883 if (inp->sctp_ep.local_hmacs != NULL) 2884 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 2885 2886 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 2887 while (shared_key) { 2888 LIST_REMOVE(shared_key, next); 2889 sctp_free_sharedkey(shared_key); 2890 /* sa_ignore FREED_MEMORY */ 2891 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 2892 } 2893 2894 inp_save = LIST_NEXT(inp, sctp_list); 2895 LIST_REMOVE(inp, sctp_list); 2896 2897 /* fix any iterators only after out of the list */ 2898 sctp_iterator_inp_being_freed(inp, inp_save); 2899 /* 2900 * if we have an address list the following will free the list of 2901 * ifaddr's that are set into this ep. Again macro limitations here, 2902 * since the LIST_FOREACH could be a bad idea. 2903 */ 2904 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; 2905 laddr = nladdr) { 2906 nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 2907 sctp_remove_laddr(laddr); 2908 } 2909 2910 #ifdef SCTP_TRACK_FREED_ASOCS 2911 /* TEMP CODE */ 2912 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; 2913 asoc = nasoc) { 2914 nasoc = LIST_NEXT(asoc, sctp_tcblist); 2915 LIST_REMOVE(asoc, sctp_tcblist); 2916 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, asoc); 2917 SCTP_DECR_ASOC_COUNT(); 2918 } 2919 /* *** END TEMP CODE *** */ 2920 #endif 2921 /* Now lets see about freeing the EP hash table. */ 2922 if (inp->sctp_tcbhash != NULL) { 2923 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 2924 inp->sctp_tcbhash = NULL; 2925 } 2926 /* Now we must put the ep memory back into the zone pool */ 2927 INP_LOCK_DESTROY(&inp->ip_inp.inp); 2928 SCTP_INP_LOCK_DESTROY(inp); 2929 SCTP_INP_READ_DESTROY(inp); 2930 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 2931 SCTP_INP_INFO_WUNLOCK(); 2932 2933 SCTP_ITERATOR_UNLOCK(); 2934 2935 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_ep, inp); 2936 SCTP_DECR_EP_COUNT(); 2937 2938 } 2939 2940 2941 struct sctp_nets * 2942 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 2943 { 2944 struct sctp_nets *net; 2945 2946 /* locate the address */ 2947 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2948 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 2949 return (net); 2950 } 2951 return (NULL); 2952 } 2953 2954 2955 int 2956 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 2957 { 2958 struct sctp_ifa *sctp_ifa; 2959 2960 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, 0); 2961 if (sctp_ifa) { 2962 return (1); 2963 } else { 2964 return (0); 2965 } 2966 } 2967 2968 /* 2969 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 2970 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 2971 * stats of stuff. 2972 */ 2973 int 2974 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 2975 int set_scope, int from) 2976 { 2977 /* 2978 * The following is redundant to the same lines in the 2979 * sctp_aloc_assoc() but is needed since other's call the add 2980 * address function 2981 */ 2982 struct sctp_nets *net, *netfirst; 2983 int addr_inscope; 2984 2985 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 2986 from); 2987 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 2988 2989 netfirst = sctp_findnet(stcb, newaddr); 2990 if (netfirst) { 2991 /* 2992 * Lie and return ok, we don't want to make the association 2993 * go away for this behavior. It will happen in the TCP 2994 * model in a connected socket. It does not reach the hash 2995 * table until after the association is built so it can't be 2996 * found. Mark as reachable, since the initial creation will 2997 * have been cleared and the NOT_IN_ASSOC flag will have 2998 * been added... and we don't want to end up removing it 2999 * back out. 3000 */ 3001 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3002 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3003 SCTP_ADDR_UNCONFIRMED); 3004 } else { 3005 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3006 } 3007 3008 return (0); 3009 } 3010 addr_inscope = 1; 3011 if (newaddr->sa_family == AF_INET) { 3012 struct sockaddr_in *sin; 3013 3014 sin = (struct sockaddr_in *)newaddr; 3015 if (sin->sin_addr.s_addr == 0) { 3016 /* Invalid address */ 3017 return (-1); 3018 } 3019 /* zero out the bzero area */ 3020 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3021 3022 /* assure len is set */ 3023 sin->sin_len = sizeof(struct sockaddr_in); 3024 if (set_scope) { 3025 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3026 stcb->ipv4_local_scope = 1; 3027 #else 3028 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3029 stcb->asoc.ipv4_local_scope = 1; 3030 } 3031 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3032 } else { 3033 /* Validate the address is in scope */ 3034 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3035 (stcb->asoc.ipv4_local_scope == 0)) { 3036 addr_inscope = 0; 3037 } 3038 } 3039 } else if (newaddr->sa_family == AF_INET6) { 3040 struct sockaddr_in6 *sin6; 3041 3042 sin6 = (struct sockaddr_in6 *)newaddr; 3043 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3044 /* Invalid address */ 3045 return (-1); 3046 } 3047 /* assure len is set */ 3048 sin6->sin6_len = sizeof(struct sockaddr_in6); 3049 if (set_scope) { 3050 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3051 stcb->asoc.loopback_scope = 1; 3052 stcb->asoc.local_scope = 0; 3053 stcb->asoc.ipv4_local_scope = 1; 3054 stcb->asoc.site_scope = 1; 3055 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3056 /* 3057 * If the new destination is a LINK_LOCAL we 3058 * must have common site scope. Don't set 3059 * the local scope since we may not share 3060 * all links, only loopback can do this. 3061 * Links on the local network would also be 3062 * on our private network for v4 too. 3063 */ 3064 stcb->asoc.ipv4_local_scope = 1; 3065 stcb->asoc.site_scope = 1; 3066 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3067 /* 3068 * If the new destination is SITE_LOCAL then 3069 * we must have site scope in common. 3070 */ 3071 stcb->asoc.site_scope = 1; 3072 } 3073 } else { 3074 /* Validate the address is in scope */ 3075 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3076 (stcb->asoc.loopback_scope == 0)) { 3077 addr_inscope = 0; 3078 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3079 (stcb->asoc.local_scope == 0)) { 3080 addr_inscope = 0; 3081 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3082 (stcb->asoc.site_scope == 0)) { 3083 addr_inscope = 0; 3084 } 3085 } 3086 } else { 3087 /* not supported family type */ 3088 return (-1); 3089 } 3090 net = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_net, struct sctp_nets); 3091 if (net == NULL) { 3092 return (-1); 3093 } 3094 SCTP_INCR_RADDR_COUNT(); 3095 bzero(net, sizeof(*net)); 3096 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3097 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3098 if (newaddr->sa_family == AF_INET) { 3099 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3100 } else if (newaddr->sa_family == AF_INET6) { 3101 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3102 } 3103 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3104 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3105 stcb->asoc.loopback_scope = 1; 3106 stcb->asoc.ipv4_local_scope = 1; 3107 stcb->asoc.local_scope = 0; 3108 stcb->asoc.site_scope = 1; 3109 addr_inscope = 1; 3110 } 3111 net->failure_threshold = stcb->asoc.def_net_failure; 3112 if (addr_inscope == 0) { 3113 net->dest_state = (SCTP_ADDR_REACHABLE | 3114 SCTP_ADDR_OUT_OF_SCOPE); 3115 } else { 3116 if (from == SCTP_ADDR_IS_CONFIRMED) 3117 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3118 net->dest_state = SCTP_ADDR_REACHABLE; 3119 else 3120 net->dest_state = SCTP_ADDR_REACHABLE | 3121 SCTP_ADDR_UNCONFIRMED; 3122 } 3123 /* 3124 * We set this to 0, the timer code knows that this means its an 3125 * initial value 3126 */ 3127 net->RTO = 0; 3128 net->RTO_measured = 0; 3129 stcb->asoc.numnets++; 3130 *(&net->ref_count) = 1; 3131 net->tos_flowlabel = 0; 3132 #ifdef INET 3133 if (newaddr->sa_family == AF_INET) 3134 net->tos_flowlabel = stcb->asoc.default_tos; 3135 #endif 3136 #ifdef INET6 3137 if (newaddr->sa_family == AF_INET6) 3138 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3139 #endif 3140 /* Init the timer structure */ 3141 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3142 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3143 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3144 3145 /* Now generate a route for this guy */ 3146 /* KAME hack: embed scopeid */ 3147 if (newaddr->sa_family == AF_INET6) { 3148 struct sockaddr_in6 *sin6; 3149 3150 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3151 (void)sa6_embedscope(sin6, ip6_use_defzone); 3152 sin6->sin6_scope_id = 0; 3153 } 3154 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3155 3156 if (newaddr->sa_family == AF_INET6) { 3157 struct sockaddr_in6 *sin6; 3158 3159 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3160 (void)sa6_recoverscope(sin6); 3161 } 3162 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3163 /* Get source address */ 3164 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3165 stcb, 3166 (sctp_route_t *) & net->ro, 3167 net, 3168 0, 3169 stcb->asoc.vrf_id); 3170 /* Now get the interface MTU */ 3171 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3172 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3173 } else { 3174 net->mtu = 0; 3175 } 3176 #ifdef SCTP_PRINT_FOR_B_AND_M 3177 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu); 3178 #endif 3179 if (net->mtu == 0) { 3180 /* Huh ?? */ 3181 net->mtu = SCTP_DEFAULT_MTU; 3182 } else { 3183 uint32_t rmtu; 3184 3185 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3186 #ifdef SCTP_PRINT_FOR_B_AND_M 3187 SCTP_PRINTF("The route mtu is %d\n", rmtu); 3188 #endif 3189 if (rmtu == 0) { 3190 /* 3191 * Start things off to match mtu of 3192 * interface please. 3193 */ 3194 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3195 net->ro.ro_rt, net->mtu); 3196 } else { 3197 /* 3198 * we take the route mtu over the interface, 3199 * since the route may be leading out the 3200 * loopback, or a different interface. 3201 */ 3202 net->mtu = rmtu; 3203 } 3204 } 3205 if (from == SCTP_ALLOC_ASOC) { 3206 #ifdef SCTP_PRINT_FOR_B_AND_M 3207 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu); 3208 #endif 3209 stcb->asoc.smallest_mtu = net->mtu; 3210 } 3211 } else { 3212 net->mtu = stcb->asoc.smallest_mtu; 3213 } 3214 if (stcb->asoc.smallest_mtu > net->mtu) { 3215 #ifdef SCTP_PRINT_FOR_B_AND_M 3216 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n", 3217 net->mtu, stcb->asoc.smallest_mtu); 3218 #endif 3219 stcb->asoc.smallest_mtu = net->mtu; 3220 } 3221 /* JRS - Use the congestion control given in the CC module */ 3222 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 3223 3224 /* 3225 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3226 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3227 */ 3228 net->find_pseudo_cumack = 1; 3229 net->find_rtx_pseudo_cumack = 1; 3230 net->src_addr_selected = 0; 3231 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3232 if (net->ro.ro_rt == NULL) { 3233 /* Since we have no route put it at the back */ 3234 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3235 } else if (netfirst == NULL) { 3236 /* We are the first one in the pool. */ 3237 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3238 } else if (netfirst->ro.ro_rt == NULL) { 3239 /* 3240 * First one has NO route. Place this one ahead of the first 3241 * one. 3242 */ 3243 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3244 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3245 /* 3246 * This one has a different interface than the one at the 3247 * top of the list. Place it ahead. 3248 */ 3249 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3250 } else { 3251 /* 3252 * Ok we have the same interface as the first one. Move 3253 * forward until we find either a) one with a NULL route... 3254 * insert ahead of that b) one with a different ifp.. insert 3255 * after that. c) end of the list.. insert at the tail. 3256 */ 3257 struct sctp_nets *netlook; 3258 3259 do { 3260 netlook = TAILQ_NEXT(netfirst, sctp_next); 3261 if (netlook == NULL) { 3262 /* End of the list */ 3263 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3264 break; 3265 } else if (netlook->ro.ro_rt == NULL) { 3266 /* next one has NO route */ 3267 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 3268 break; 3269 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 3270 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 3271 net, sctp_next); 3272 break; 3273 } 3274 /* Shift forward */ 3275 netfirst = netlook; 3276 } while (netlook != NULL); 3277 } 3278 3279 /* got to have a primary set */ 3280 if (stcb->asoc.primary_destination == 0) { 3281 stcb->asoc.primary_destination = net; 3282 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 3283 (net->ro.ro_rt) && 3284 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 3285 /* No route to current primary adopt new primary */ 3286 stcb->asoc.primary_destination = net; 3287 } 3288 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 3289 net); 3290 /* Validate primary is first */ 3291 net = TAILQ_FIRST(&stcb->asoc.nets); 3292 if ((net != stcb->asoc.primary_destination) && 3293 (stcb->asoc.primary_destination)) { 3294 /* 3295 * first one on the list is NOT the primary sctp_cmpaddr() 3296 * is much more efficent if the primary is the first on the 3297 * list, make it so. 3298 */ 3299 TAILQ_REMOVE(&stcb->asoc.nets, 3300 stcb->asoc.primary_destination, sctp_next); 3301 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 3302 stcb->asoc.primary_destination, sctp_next); 3303 } 3304 return (0); 3305 } 3306 3307 3308 /* 3309 * allocate an association and add it to the endpoint. The caller must be 3310 * careful to add all additional addresses once they are know right away or 3311 * else the assoc will be may experience a blackout scenario. 3312 */ 3313 struct sctp_tcb * 3314 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 3315 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id) 3316 { 3317 struct sctp_tcb *stcb; 3318 struct sctp_association *asoc; 3319 struct sctpasochead *head; 3320 uint16_t rport; 3321 int err; 3322 3323 /* 3324 * Assumption made here: Caller has done a 3325 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 3326 * address does not exist already. 3327 */ 3328 if (sctppcbinfo.ipi_count_asoc >= SCTP_MAX_NUM_OF_ASOC) { 3329 /* Hit max assoc, sorry no more */ 3330 *error = ENOBUFS; 3331 return (NULL); 3332 } 3333 if (firstaddr == NULL) { 3334 *error = EINVAL; 3335 return (NULL); 3336 } 3337 SCTP_INP_RLOCK(inp); 3338 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 3339 /* 3340 * If its in the TCP pool, its NOT allowed to create an 3341 * association. The parent listener needs to call 3342 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 3343 * off, or connected one does this.. its an error. 3344 */ 3345 SCTP_INP_RUNLOCK(inp); 3346 *error = EINVAL; 3347 return (NULL); 3348 } 3349 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 3350 #ifdef SCTP_DEBUG 3351 if (firstaddr) { 3352 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 3353 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 3354 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 3355 } else { 3356 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 3357 } 3358 #endif /* SCTP_DEBUG */ 3359 if (firstaddr->sa_family == AF_INET) { 3360 struct sockaddr_in *sin; 3361 3362 sin = (struct sockaddr_in *)firstaddr; 3363 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 3364 /* Invalid address */ 3365 SCTP_INP_RUNLOCK(inp); 3366 *error = EINVAL; 3367 return (NULL); 3368 } 3369 rport = sin->sin_port; 3370 } else if (firstaddr->sa_family == AF_INET6) { 3371 struct sockaddr_in6 *sin6; 3372 3373 sin6 = (struct sockaddr_in6 *)firstaddr; 3374 if ((sin6->sin6_port == 0) || 3375 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 3376 /* Invalid address */ 3377 SCTP_INP_RUNLOCK(inp); 3378 *error = EINVAL; 3379 return (NULL); 3380 } 3381 rport = sin6->sin6_port; 3382 } else { 3383 /* not supported family type */ 3384 SCTP_INP_RUNLOCK(inp); 3385 *error = EINVAL; 3386 return (NULL); 3387 } 3388 SCTP_INP_RUNLOCK(inp); 3389 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 3390 /* 3391 * If you have not performed a bind, then we need to do the 3392 * ephemerial bind for you. 3393 */ 3394 if ((err = sctp_inpcb_bind(inp->sctp_socket, 3395 (struct sockaddr *)NULL, 3396 (struct thread *)NULL 3397 ))) { 3398 /* bind error, probably perm */ 3399 *error = err; 3400 return (NULL); 3401 } 3402 } 3403 stcb = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_asoc, struct sctp_tcb); 3404 if (stcb == NULL) { 3405 /* out of memory? */ 3406 *error = ENOMEM; 3407 return (NULL); 3408 } 3409 SCTP_INCR_ASOC_COUNT(); 3410 3411 bzero(stcb, sizeof(*stcb)); 3412 asoc = &stcb->asoc; 3413 SCTP_TCB_LOCK_INIT(stcb); 3414 SCTP_TCB_SEND_LOCK_INIT(stcb); 3415 /* setup back pointer's */ 3416 stcb->sctp_ep = inp; 3417 stcb->sctp_socket = inp->sctp_socket; 3418 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) { 3419 /* failed */ 3420 SCTP_TCB_LOCK_DESTROY(stcb); 3421 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3422 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3423 SCTP_DECR_ASOC_COUNT(); 3424 *error = err; 3425 return (NULL); 3426 } 3427 /* and the port */ 3428 stcb->rport = rport; 3429 SCTP_INP_INFO_WLOCK(); 3430 SCTP_INP_WLOCK(inp); 3431 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3432 /* inpcb freed while alloc going on */ 3433 SCTP_TCB_LOCK_DESTROY(stcb); 3434 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3435 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3436 SCTP_INP_WUNLOCK(inp); 3437 SCTP_INP_INFO_WUNLOCK(); 3438 SCTP_DECR_ASOC_COUNT(); 3439 *error = EINVAL; 3440 return (NULL); 3441 } 3442 SCTP_TCB_LOCK(stcb); 3443 3444 /* now that my_vtag is set, add it to the hash */ 3445 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, 3446 sctppcbinfo.hashasocmark)]; 3447 /* put it in the bucket in the vtag hash of assoc's for the system */ 3448 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 3449 SCTP_INP_INFO_WUNLOCK(); 3450 3451 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 3452 /* failure.. memory error? */ 3453 if (asoc->strmout) { 3454 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 3455 asoc->strmout = NULL; 3456 } 3457 if (asoc->mapping_array) { 3458 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 3459 asoc->mapping_array = NULL; 3460 } 3461 SCTP_DECR_ASOC_COUNT(); 3462 SCTP_TCB_LOCK_DESTROY(stcb); 3463 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3464 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 3465 SCTP_INP_WUNLOCK(inp); 3466 *error = ENOBUFS; 3467 return (NULL); 3468 } 3469 /* Init all the timers */ 3470 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 3471 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 3472 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 3473 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 3474 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 3475 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 3476 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 3477 3478 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 3479 /* now file the port under the hash as well */ 3480 if (inp->sctp_tcbhash != NULL) { 3481 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 3482 inp->sctp_hashmark)]; 3483 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 3484 } 3485 SCTP_INP_WUNLOCK(inp); 3486 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 3487 return (stcb); 3488 } 3489 3490 3491 void 3492 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 3493 { 3494 struct sctp_association *asoc; 3495 3496 asoc = &stcb->asoc; 3497 asoc->numnets--; 3498 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 3499 if (net == asoc->primary_destination) { 3500 /* Reset primary */ 3501 struct sctp_nets *lnet; 3502 3503 lnet = TAILQ_FIRST(&asoc->nets); 3504 /* Try to find a confirmed primary */ 3505 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 3506 } 3507 if (net == asoc->last_data_chunk_from) { 3508 /* Reset primary */ 3509 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 3510 } 3511 if (net == asoc->last_control_chunk_from) { 3512 /* Clear net */ 3513 asoc->last_control_chunk_from = NULL; 3514 } 3515 sctp_free_remote_addr(net); 3516 } 3517 3518 /* 3519 * remove a remote endpoint address from an association, it will fail if the 3520 * address does not exist. 3521 */ 3522 int 3523 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 3524 { 3525 /* 3526 * Here we need to remove a remote address. This is quite simple, we 3527 * first find it in the list of address for the association 3528 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 3529 * on that item. Note we do not allow it to be removed if there are 3530 * no other addresses. 3531 */ 3532 struct sctp_association *asoc; 3533 struct sctp_nets *net, *net_tmp; 3534 3535 asoc = &stcb->asoc; 3536 3537 /* locate the address */ 3538 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { 3539 net_tmp = TAILQ_NEXT(net, sctp_next); 3540 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 3541 continue; 3542 } 3543 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 3544 remaddr)) { 3545 /* we found the guy */ 3546 if (asoc->numnets < 2) { 3547 /* Must have at LEAST two remote addresses */ 3548 return (-1); 3549 } else { 3550 sctp_remove_net(stcb, net); 3551 return (0); 3552 } 3553 } 3554 } 3555 /* not found. */ 3556 return (-2); 3557 } 3558 3559 3560 void 3561 sctp_add_vtag_to_timewait(struct sctp_inpcb *inp, uint32_t tag, uint32_t time) 3562 { 3563 struct sctpvtaghead *chain; 3564 struct sctp_tagblock *twait_block; 3565 struct timeval now; 3566 int set, i; 3567 3568 (void)SCTP_GETTIME_TIMEVAL(&now); 3569 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 3570 set = 0; 3571 if (!SCTP_LIST_EMPTY(chain)) { 3572 /* Block(s) present, lets find space, and expire on the fly */ 3573 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 3574 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 3575 if ((twait_block->vtag_block[i].v_tag == 0) && 3576 !set) { 3577 twait_block->vtag_block[i].tv_sec_at_expire = 3578 now.tv_sec + time; 3579 twait_block->vtag_block[i].v_tag = tag; 3580 set = 1; 3581 } else if ((twait_block->vtag_block[i].v_tag) && 3582 ((long)twait_block->vtag_block[i].tv_sec_at_expire > 3583 now.tv_sec)) { 3584 /* Audit expires this guy */ 3585 twait_block->vtag_block[i].tv_sec_at_expire = 0; 3586 twait_block->vtag_block[i].v_tag = 0; 3587 if (set == 0) { 3588 /* Reuse it for my new tag */ 3589 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + SCTP_TIME_WAIT; 3590 twait_block->vtag_block[0].v_tag = tag; 3591 set = 1; 3592 } 3593 } 3594 } 3595 if (set) { 3596 /* 3597 * We only do up to the block where we can 3598 * place our tag for audits 3599 */ 3600 break; 3601 } 3602 } 3603 } 3604 /* Need to add a new block to chain */ 3605 if (!set) { 3606 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 3607 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 3608 if (twait_block == NULL) { 3609 return; 3610 } 3611 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 3612 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 3613 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + 3614 SCTP_TIME_WAIT; 3615 twait_block->vtag_block[0].v_tag = tag; 3616 } 3617 } 3618 3619 3620 static void 3621 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 3622 { 3623 struct sctp_iterator *it; 3624 3625 /* 3626 * Unlock the tcb lock we do this so we avoid a dead lock scenario 3627 * where the iterator is waiting on the TCB lock and the TCB lock is 3628 * waiting on the iterator lock. 3629 */ 3630 it = stcb->asoc.stcb_starting_point_for_iterator; 3631 if (it == NULL) { 3632 return; 3633 } 3634 if (it->inp != stcb->sctp_ep) { 3635 /* hmm, focused on the wrong one? */ 3636 return; 3637 } 3638 if (it->stcb != stcb) { 3639 return; 3640 } 3641 it->stcb = LIST_NEXT(stcb, sctp_tcblist); 3642 if (it->stcb == NULL) { 3643 /* done with all asoc's in this assoc */ 3644 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3645 it->inp = NULL; 3646 } else { 3647 it->inp = LIST_NEXT(inp, sctp_list); 3648 } 3649 } 3650 } 3651 3652 3653 /* 3654 * Free the association after un-hashing the remote port. 3655 */ 3656 int 3657 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 3658 { 3659 int i; 3660 struct sctp_association *asoc; 3661 struct sctp_nets *net, *prev; 3662 struct sctp_laddr *laddr; 3663 struct sctp_tmit_chunk *chk; 3664 struct sctp_asconf_addr *aparam; 3665 struct sctp_stream_reset_list *liste; 3666 struct sctp_queued_to_read *sq; 3667 struct sctp_stream_queue_pending *sp; 3668 sctp_sharedkey_t *shared_key; 3669 struct socket *so; 3670 int ccnt = 0; 3671 int cnt = 0; 3672 3673 /* first, lets purge the entry from the hash table. */ 3674 3675 #ifdef SCTP_LOG_CLOSING 3676 sctp_log_closing(inp, stcb, 6); 3677 #endif 3678 if (stcb->asoc.state == 0) { 3679 #ifdef SCTP_LOG_CLOSING 3680 sctp_log_closing(inp, NULL, 7); 3681 #endif 3682 /* there is no asoc, really TSNH :-0 */ 3683 return (1); 3684 } 3685 /* TEMP CODE */ 3686 if (stcb->freed_from_where == 0) { 3687 /* Only record the first place free happened from */ 3688 stcb->freed_from_where = from_location; 3689 } 3690 /* TEMP CODE */ 3691 3692 asoc = &stcb->asoc; 3693 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3694 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3695 /* nothing around */ 3696 so = NULL; 3697 else 3698 so = inp->sctp_socket; 3699 3700 /* 3701 * We used timer based freeing if a reader or writer is in the way. 3702 * So we first check if we are actually being called from a timer, 3703 * if so we abort early if a reader or writer is still in the way. 3704 */ 3705 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 3706 (from_inpcbfree == SCTP_NORMAL_PROC)) { 3707 /* 3708 * is it the timer driving us? if so are the reader/writers 3709 * gone? 3710 */ 3711 if (stcb->asoc.refcnt) { 3712 /* nope, reader or writer in the way */ 3713 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3714 /* no asoc destroyed */ 3715 SCTP_TCB_UNLOCK(stcb); 3716 #ifdef SCTP_LOG_CLOSING 3717 sctp_log_closing(inp, stcb, 8); 3718 #endif 3719 return (0); 3720 } 3721 } 3722 /* now clean up any other timers */ 3723 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 3724 asoc->hb_timer.self = NULL; 3725 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 3726 asoc->dack_timer.self = NULL; 3727 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3728 /*- 3729 * For stream reset we don't blast this unless 3730 * it is a str-reset timer, it might be the 3731 * free-asoc timer which we DON'T want to 3732 * disturb. 3733 */ 3734 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 3735 asoc->strreset_timer.self = NULL; 3736 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 3737 asoc->asconf_timer.self = NULL; 3738 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 3739 asoc->autoclose_timer.self = NULL; 3740 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 3741 asoc->shut_guard_timer.self = NULL; 3742 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 3743 asoc->delayed_event_timer.self = NULL; 3744 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 3745 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 3746 net->fr_timer.self = NULL; 3747 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 3748 net->rxt_timer.self = NULL; 3749 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 3750 net->pmtu_timer.self = NULL; 3751 } 3752 /* Now the read queue needs to be cleaned up (only once) */ 3753 cnt = 0; 3754 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 3755 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 3756 SCTP_INP_READ_LOCK(inp); 3757 TAILQ_FOREACH(sq, &inp->read_queue, next) { 3758 if (sq->stcb == stcb) { 3759 sq->do_not_ref_stcb = 1; 3760 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 3761 /* 3762 * If there is no end, there never will be 3763 * now. 3764 */ 3765 if (sq->end_added == 0) { 3766 /* Held for PD-API clear that. */ 3767 sq->pdapi_aborted = 1; 3768 sq->held_length = 0; 3769 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT)) { 3770 /* 3771 * Need to add a PD-API 3772 * aborted indication. 3773 * Setting the control_pdapi 3774 * assures that it will be 3775 * added right after this 3776 * msg. 3777 */ 3778 uint32_t strseq; 3779 3780 stcb->asoc.control_pdapi = sq; 3781 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 3782 sctp_notify_partial_delivery_indication(stcb, 3783 SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq); 3784 stcb->asoc.control_pdapi = NULL; 3785 } 3786 } 3787 /* Add an end to wake them */ 3788 sq->end_added = 1; 3789 cnt++; 3790 } 3791 } 3792 SCTP_INP_READ_UNLOCK(inp); 3793 if (stcb->block_entry) { 3794 cnt++; 3795 stcb->block_entry->error = ECONNRESET; 3796 stcb->block_entry = NULL; 3797 } 3798 } 3799 if ((from_inpcbfree != SCTP_PCBFREE_FORCE) && (stcb->asoc.refcnt)) { 3800 /* 3801 * reader or writer in the way, we have hopefully given him 3802 * something to chew on above. 3803 */ 3804 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 3805 SCTP_TCB_UNLOCK(stcb); 3806 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3807 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3808 /* nothing around */ 3809 so = NULL; 3810 if (so) { 3811 /* Wake any reader/writers */ 3812 sctp_sorwakeup(inp, so); 3813 sctp_sowwakeup(inp, so); 3814 } 3815 #ifdef SCTP_LOG_CLOSING 3816 sctp_log_closing(inp, stcb, 9); 3817 #endif 3818 /* no asoc destroyed */ 3819 return (0); 3820 } 3821 #ifdef SCTP_LOG_CLOSING 3822 sctp_log_closing(inp, stcb, 10); 3823 #endif 3824 /* 3825 * When I reach here, no others want to kill the assoc yet.. and I 3826 * own the lock. Now its possible an abort comes in when I do the 3827 * lock exchange below to grab all the locks to do the final take 3828 * out. to prevent this we increment the count, which will start a 3829 * timer and blow out above thus assuring us that we hold exclusive 3830 * killing of the asoc. Note that after getting back the TCB lock we 3831 * will go ahead and increment the counter back up and stop any 3832 * timer a passing stranger may have started :-S 3833 */ 3834 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3835 atomic_add_int(&stcb->asoc.refcnt, 1); 3836 3837 SCTP_TCB_UNLOCK(stcb); 3838 3839 SCTP_ITERATOR_LOCK(); 3840 SCTP_INP_INFO_WLOCK(); 3841 SCTP_INP_WLOCK(inp); 3842 SCTP_TCB_LOCK(stcb); 3843 } 3844 /* Double check the GONE flag */ 3845 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 3846 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 3847 /* nothing around */ 3848 so = NULL; 3849 3850 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 3851 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 3852 /* 3853 * For TCP type we need special handling when we are 3854 * connected. We also include the peel'ed off ones to. 3855 */ 3856 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 3857 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 3858 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 3859 if (so) { 3860 SOCK_LOCK(so); 3861 if (so->so_rcv.sb_cc == 0) { 3862 so->so_state &= ~(SS_ISCONNECTING | 3863 SS_ISDISCONNECTING | 3864 SS_ISCONFIRMING | 3865 SS_ISCONNECTED); 3866 } 3867 SOCK_UNLOCK(so); 3868 sctp_sowwakeup(inp, so); 3869 sctp_sorwakeup(inp, so); 3870 SCTP_SOWAKEUP(so); 3871 } 3872 } 3873 } 3874 /* 3875 * Make it invalid too, that way if its about to run it will abort 3876 * and return. 3877 */ 3878 sctp_iterator_asoc_being_freed(inp, stcb); 3879 /* re-increment the lock */ 3880 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3881 atomic_add_int(&stcb->asoc.refcnt, -1); 3882 } 3883 asoc->state = 0; 3884 if (inp->sctp_tcbhash) { 3885 LIST_REMOVE(stcb, sctp_tcbhash); 3886 } 3887 if (stcb->asoc.in_restart_hash) { 3888 LIST_REMOVE(stcb, sctp_tcbrestarhash); 3889 } 3890 /* Now lets remove it from the list of ALL associations in the EP */ 3891 LIST_REMOVE(stcb, sctp_tcblist); 3892 if (from_inpcbfree == SCTP_NORMAL_PROC) { 3893 SCTP_INP_INCR_REF(inp); 3894 SCTP_INP_WUNLOCK(inp); 3895 SCTP_ITERATOR_UNLOCK(); 3896 } 3897 /* pull from vtag hash */ 3898 LIST_REMOVE(stcb, sctp_asocs); 3899 sctp_add_vtag_to_timewait(inp, asoc->my_vtag, SCTP_TIME_WAIT); 3900 3901 3902 /* 3903 * Now restop the timers to be sure - this is paranoia at is finest! 3904 */ 3905 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3906 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 3907 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 3908 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 3909 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 3910 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 3911 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 3912 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 3913 3914 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 3915 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 3916 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 3917 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 3918 } 3919 3920 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 3921 prev = NULL; 3922 /* 3923 * The chunk lists and such SHOULD be empty but we check them just 3924 * in case. 3925 */ 3926 /* anything on the wheel needs to be removed */ 3927 for (i = 0; i < asoc->streamoutcnt; i++) { 3928 struct sctp_stream_out *outs; 3929 3930 outs = &asoc->strmout[i]; 3931 /* now clean up any chunks here */ 3932 sp = TAILQ_FIRST(&outs->outqueue); 3933 while (sp) { 3934 TAILQ_REMOVE(&outs->outqueue, sp, next); 3935 if (sp->data) { 3936 sctp_m_freem(sp->data); 3937 sp->data = NULL; 3938 sp->tail_mbuf = NULL; 3939 } 3940 sctp_free_remote_addr(sp->net); 3941 sctp_free_spbufspace(stcb, asoc, sp); 3942 /* Free the zone stuff */ 3943 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_strmoq, sp); 3944 SCTP_DECR_STRMOQ_COUNT(); 3945 /* sa_ignore FREED_MEMORY */ 3946 sp = TAILQ_FIRST(&outs->outqueue); 3947 } 3948 } 3949 3950 /* sa_ignore FREED_MEMORY */ 3951 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { 3952 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); 3953 SCTP_FREE(liste, SCTP_M_STRESET); 3954 } 3955 3956 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 3957 while (sq) { 3958 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 3959 if (sq->data) { 3960 sctp_m_freem(sq->data); 3961 sq->data = NULL; 3962 } 3963 sctp_free_remote_addr(sq->whoFrom); 3964 sq->whoFrom = NULL; 3965 sq->stcb = NULL; 3966 /* Free the ctl entry */ 3967 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, sq); 3968 SCTP_DECR_READQ_COUNT(); 3969 /* sa_ignore FREED_MEMORY */ 3970 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 3971 } 3972 3973 chk = TAILQ_FIRST(&asoc->free_chunks); 3974 while (chk) { 3975 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 3976 if (chk->data) { 3977 sctp_m_freem(chk->data); 3978 chk->data = NULL; 3979 } 3980 ccnt++; 3981 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 3982 SCTP_DECR_CHK_COUNT(); 3983 atomic_subtract_int(&sctppcbinfo.ipi_free_chunks, 1); 3984 asoc->free_chunk_cnt--; 3985 /* sa_ignore FREED_MEMORY */ 3986 chk = TAILQ_FIRST(&asoc->free_chunks); 3987 } 3988 /* pending send queue SHOULD be empty */ 3989 if (!TAILQ_EMPTY(&asoc->send_queue)) { 3990 chk = TAILQ_FIRST(&asoc->send_queue); 3991 while (chk) { 3992 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 3993 if (chk->data) { 3994 sctp_m_freem(chk->data); 3995 chk->data = NULL; 3996 } 3997 ccnt++; 3998 sctp_free_remote_addr(chk->whoTo); 3999 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4000 SCTP_DECR_CHK_COUNT(); 4001 /* sa_ignore FREED_MEMORY */ 4002 chk = TAILQ_FIRST(&asoc->send_queue); 4003 } 4004 } 4005 /* 4006 if(ccnt) { 4007 printf("Freed %d from send_queue\n", ccnt); 4008 ccnt = 0; 4009 } 4010 */ 4011 /* sent queue SHOULD be empty */ 4012 if (!TAILQ_EMPTY(&asoc->sent_queue)) { 4013 chk = TAILQ_FIRST(&asoc->sent_queue); 4014 while (chk) { 4015 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4016 if (chk->data) { 4017 sctp_m_freem(chk->data); 4018 chk->data = NULL; 4019 } 4020 ccnt++; 4021 sctp_free_remote_addr(chk->whoTo); 4022 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4023 SCTP_DECR_CHK_COUNT(); 4024 /* sa_ignore FREED_MEMORY */ 4025 chk = TAILQ_FIRST(&asoc->sent_queue); 4026 } 4027 } 4028 /* 4029 if(ccnt) { 4030 printf("Freed %d from sent_queue\n", ccnt); 4031 ccnt = 0; 4032 } 4033 */ 4034 /* control queue MAY not be empty */ 4035 if (!TAILQ_EMPTY(&asoc->control_send_queue)) { 4036 chk = TAILQ_FIRST(&asoc->control_send_queue); 4037 while (chk) { 4038 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4039 if (chk->data) { 4040 sctp_m_freem(chk->data); 4041 chk->data = NULL; 4042 } 4043 ccnt++; 4044 sctp_free_remote_addr(chk->whoTo); 4045 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4046 SCTP_DECR_CHK_COUNT(); 4047 /* sa_ignore FREED_MEMORY */ 4048 chk = TAILQ_FIRST(&asoc->control_send_queue); 4049 } 4050 } 4051 /* 4052 if(ccnt) { 4053 printf("Freed %d from ctrl_queue\n", ccnt); 4054 ccnt = 0; 4055 } 4056 */ 4057 if (!TAILQ_EMPTY(&asoc->reasmqueue)) { 4058 chk = TAILQ_FIRST(&asoc->reasmqueue); 4059 while (chk) { 4060 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4061 if (chk->data) { 4062 sctp_m_freem(chk->data); 4063 chk->data = NULL; 4064 } 4065 sctp_free_remote_addr(chk->whoTo); 4066 ccnt++; 4067 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_chunk, chk); 4068 SCTP_DECR_CHK_COUNT(); 4069 /* sa_ignore FREED_MEMORY */ 4070 chk = TAILQ_FIRST(&asoc->reasmqueue); 4071 } 4072 } 4073 /* 4074 if(ccnt) { 4075 printf("Freed %d from reasm_queue\n", ccnt); 4076 ccnt = 0; 4077 } 4078 */ 4079 if (asoc->mapping_array) { 4080 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4081 asoc->mapping_array = NULL; 4082 } 4083 /* the stream outs */ 4084 if (asoc->strmout) { 4085 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4086 asoc->strmout = NULL; 4087 } 4088 asoc->streamoutcnt = 0; 4089 if (asoc->strmin) { 4090 struct sctp_queued_to_read *ctl; 4091 4092 for (i = 0; i < asoc->streamincnt; i++) { 4093 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { 4094 /* We have somethings on the streamin queue */ 4095 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4096 while (ctl) { 4097 TAILQ_REMOVE(&asoc->strmin[i].inqueue, 4098 ctl, next); 4099 sctp_free_remote_addr(ctl->whoFrom); 4100 if (ctl->data) { 4101 sctp_m_freem(ctl->data); 4102 ctl->data = NULL; 4103 } 4104 /* 4105 * We don't free the address here 4106 * since all the net's were freed 4107 * above. 4108 */ 4109 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); 4110 SCTP_DECR_READQ_COUNT(); 4111 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4112 } 4113 } 4114 } 4115 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4116 asoc->strmin = NULL; 4117 } 4118 asoc->streamincnt = 0; 4119 while (!TAILQ_EMPTY(&asoc->nets)) { 4120 /* sa_ignore FREED_MEMORY */ 4121 net = TAILQ_FIRST(&asoc->nets); 4122 /* pull from list */ 4123 if ((sctppcbinfo.ipi_count_raddr == 0) || (prev == net)) { 4124 #ifdef INVARIANTS 4125 panic("no net's left alloc'ed, or list points to itself"); 4126 #endif 4127 break; 4128 } 4129 prev = net; 4130 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4131 sctp_free_remote_addr(net); 4132 } 4133 4134 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) { 4135 /* sa_ignore FREED_MEMORY */ 4136 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); 4137 sctp_remove_laddr(laddr); 4138 } 4139 4140 /* pending asconf (address) parameters */ 4141 while (!TAILQ_EMPTY(&asoc->asconf_queue)) { 4142 /* sa_ignore FREED_MEMORY */ 4143 aparam = TAILQ_FIRST(&asoc->asconf_queue); 4144 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 4145 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 4146 } 4147 if (asoc->last_asconf_ack_sent != NULL) { 4148 sctp_m_freem(asoc->last_asconf_ack_sent); 4149 asoc->last_asconf_ack_sent = NULL; 4150 } 4151 /* clean up auth stuff */ 4152 if (asoc->local_hmacs) 4153 sctp_free_hmaclist(asoc->local_hmacs); 4154 if (asoc->peer_hmacs) 4155 sctp_free_hmaclist(asoc->peer_hmacs); 4156 4157 if (asoc->local_auth_chunks) 4158 sctp_free_chunklist(asoc->local_auth_chunks); 4159 if (asoc->peer_auth_chunks) 4160 sctp_free_chunklist(asoc->peer_auth_chunks); 4161 4162 sctp_free_authinfo(&asoc->authinfo); 4163 4164 shared_key = LIST_FIRST(&asoc->shared_keys); 4165 while (shared_key) { 4166 LIST_REMOVE(shared_key, next); 4167 sctp_free_sharedkey(shared_key); 4168 /* sa_ignore FREED_MEMORY */ 4169 shared_key = LIST_FIRST(&asoc->shared_keys); 4170 } 4171 4172 /* Insert new items here :> */ 4173 4174 /* Get rid of LOCK */ 4175 SCTP_TCB_LOCK_DESTROY(stcb); 4176 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4177 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4178 SCTP_INP_INFO_WUNLOCK(); 4179 SCTP_INP_RLOCK(inp); 4180 } 4181 #ifdef SCTP_TRACK_FREED_ASOCS 4182 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4183 /* now clean up the tasoc itself */ 4184 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 4185 SCTP_DECR_ASOC_COUNT(); 4186 } else { 4187 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 4188 } 4189 #else 4190 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_asoc, stcb); 4191 SCTP_DECR_ASOC_COUNT(); 4192 #endif 4193 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4194 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4195 /* 4196 * If its NOT the inp_free calling us AND sctp_close 4197 * as been called, we call back... 4198 */ 4199 SCTP_INP_RUNLOCK(inp); 4200 /* 4201 * This will start the kill timer (if we are the 4202 * lastone) since we hold an increment yet. But this 4203 * is the only safe way to do this since otherwise 4204 * if the socket closes at the same time we are here 4205 * we might collide in the cleanup. 4206 */ 4207 sctp_inpcb_free(inp, 4208 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 4209 SCTP_CALLED_DIRECTLY_NOCMPSET); 4210 SCTP_INP_DECR_REF(inp); 4211 goto out_of; 4212 } else { 4213 /* The socket is still open. */ 4214 SCTP_INP_DECR_REF(inp); 4215 } 4216 } 4217 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4218 SCTP_INP_RUNLOCK(inp); 4219 } 4220 out_of: 4221 /* destroyed the asoc */ 4222 #ifdef SCTP_LOG_CLOSING 4223 sctp_log_closing(inp, NULL, 11); 4224 #endif 4225 return (1); 4226 } 4227 4228 4229 4230 /* 4231 * determine if a destination is "reachable" based upon the addresses bound 4232 * to the current endpoint (e.g. only v4 or v6 currently bound) 4233 */ 4234 /* 4235 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 4236 * assoc level v4/v6 flags, as the assoc *may* not have the same address 4237 * types bound as its endpoint 4238 */ 4239 int 4240 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 4241 { 4242 struct sctp_inpcb *inp; 4243 int answer; 4244 4245 /* 4246 * No locks here, the TCB, in all cases is already locked and an 4247 * assoc is up. There is either a INP lock by the caller applied (in 4248 * asconf case when deleting an address) or NOT in the HB case, 4249 * however if HB then the INP increment is up and the INP will not 4250 * be removed (on top of the fact that we have a TCB lock). So we 4251 * only want to read the sctp_flags, which is either bound-all or 4252 * not.. no protection needed since once an assoc is up you can't be 4253 * changing your binding. 4254 */ 4255 inp = stcb->sctp_ep; 4256 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4257 /* if bound all, destination is not restricted */ 4258 /* 4259 * RRS: Question during lock work: Is this correct? If you 4260 * are bound-all you still might need to obey the V4--V6 4261 * flags??? IMO this bound-all stuff needs to be removed! 4262 */ 4263 return (1); 4264 } 4265 /* NOTE: all "scope" checks are done when local addresses are added */ 4266 if (destaddr->sa_family == AF_INET6) { 4267 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 4268 } else if (destaddr->sa_family == AF_INET) { 4269 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 4270 } else { 4271 /* invalid family, so it's unreachable */ 4272 answer = 0; 4273 } 4274 return (answer); 4275 } 4276 4277 /* 4278 * update the inp_vflags on an endpoint 4279 */ 4280 static void 4281 sctp_update_ep_vflag(struct sctp_inpcb *inp) 4282 { 4283 struct sctp_laddr *laddr; 4284 4285 /* first clear the flag */ 4286 inp->ip_inp.inp.inp_vflag = 0; 4287 /* set the flag based on addresses on the ep list */ 4288 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4289 if (laddr->ifa == NULL) { 4290 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 4291 __FUNCTION__); 4292 continue; 4293 } 4294 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 4295 continue; 4296 } 4297 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 4298 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4299 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 4300 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4301 } 4302 } 4303 } 4304 4305 /* 4306 * Add the address to the endpoint local address list There is nothing to be 4307 * done if we are bound to all addresses 4308 */ 4309 void 4310 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 4311 { 4312 struct sctp_laddr *laddr; 4313 int fnd, error = 0; 4314 4315 fnd = 0; 4316 4317 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4318 /* You are already bound to all. You have it already */ 4319 return; 4320 } 4321 if (ifa->address.sa.sa_family == AF_INET6) { 4322 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 4323 /* Can't bind a non-useable addr. */ 4324 return; 4325 } 4326 } 4327 /* first, is it already present? */ 4328 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4329 if (laddr->ifa == ifa) { 4330 fnd = 1; 4331 break; 4332 } 4333 } 4334 4335 if (fnd == 0) { 4336 /* Not in the ep list */ 4337 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 4338 if (error != 0) 4339 return; 4340 inp->laddr_count++; 4341 /* update inp_vflag flags */ 4342 if (ifa->address.sa.sa_family == AF_INET6) { 4343 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4344 } else if (ifa->address.sa.sa_family == AF_INET) { 4345 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4346 } 4347 } 4348 return; 4349 } 4350 4351 4352 /* 4353 * select a new (hopefully reachable) destination net (should only be used 4354 * when we deleted an ep addr that is the only usable source address to reach 4355 * the destination net) 4356 */ 4357 static void 4358 sctp_select_primary_destination(struct sctp_tcb *stcb) 4359 { 4360 struct sctp_nets *net; 4361 4362 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4363 /* for now, we'll just pick the first reachable one we find */ 4364 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 4365 continue; 4366 if (sctp_destination_is_reachable(stcb, 4367 (struct sockaddr *)&net->ro._l_addr)) { 4368 /* found a reachable destination */ 4369 stcb->asoc.primary_destination = net; 4370 } 4371 } 4372 /* I can't there from here! ...we're gonna die shortly... */ 4373 } 4374 4375 4376 /* 4377 * Delete the address from the endpoint local address list There is nothing 4378 * to be done if we are bound to all addresses 4379 */ 4380 void 4381 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 4382 { 4383 struct sctp_laddr *laddr; 4384 int fnd; 4385 4386 fnd = 0; 4387 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4388 /* You are already bound to all. You have it already */ 4389 return; 4390 } 4391 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4392 if (laddr->ifa == ifa) { 4393 fnd = 1; 4394 break; 4395 } 4396 } 4397 if (fnd && (inp->laddr_count < 2)) { 4398 /* can't delete unless there are at LEAST 2 addresses */ 4399 return; 4400 } 4401 if (fnd) { 4402 /* 4403 * clean up any use of this address go through our 4404 * associations and clear any last_used_address that match 4405 * this one for each assoc, see if a new primary_destination 4406 * is needed 4407 */ 4408 struct sctp_tcb *stcb; 4409 4410 /* clean up "next_addr_touse" */ 4411 if (inp->next_addr_touse == laddr) 4412 /* delete this address */ 4413 inp->next_addr_touse = NULL; 4414 4415 /* clean up "last_used_address" */ 4416 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 4417 struct sctp_nets *net; 4418 4419 SCTP_TCB_LOCK(stcb); 4420 if (stcb->asoc.last_used_address == laddr) 4421 /* delete this address */ 4422 stcb->asoc.last_used_address = NULL; 4423 /* 4424 * Now spin through all the nets and purge any ref 4425 * to laddr 4426 */ 4427 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4428 if (net->ro._s_addr && 4429 (net->ro._s_addr->ifa == laddr->ifa)) { 4430 /* Yep, purge src address selected */ 4431 sctp_rtentry_t *rt; 4432 4433 /* delete this address if cached */ 4434 rt = net->ro.ro_rt; 4435 if (rt != NULL) { 4436 RTFREE(rt); 4437 net->ro.ro_rt = NULL; 4438 } 4439 sctp_free_ifa(net->ro._s_addr); 4440 net->ro._s_addr = NULL; 4441 net->src_addr_selected = 0; 4442 } 4443 } 4444 SCTP_TCB_UNLOCK(stcb); 4445 } /* for each tcb */ 4446 /* remove it from the ep list */ 4447 sctp_remove_laddr(laddr); 4448 inp->laddr_count--; 4449 /* update inp_vflag flags */ 4450 sctp_update_ep_vflag(inp); 4451 } 4452 return; 4453 } 4454 4455 /* 4456 * Add the addr to the TCB local address list For the BOUNDALL or dynamic 4457 * case, this is a "pending" address list (eg. addresses waiting for an 4458 * ASCONF-ACK response) For the subset binding, static case, this is a 4459 * "valid" address list 4460 */ 4461 void 4462 sctp_add_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa, int restricted_list) 4463 { 4464 struct sctp_inpcb *inp; 4465 struct sctp_laddr *laddr; 4466 struct sctpladdr *list; 4467 4468 /* 4469 * Assumes TCB is locked.. and possibly the INP. May need to 4470 * confirm/fix that if we need it and is not the case. 4471 */ 4472 list = &stcb->asoc.sctp_restricted_addrs; 4473 4474 inp = stcb->sctp_ep; 4475 if (ifa->address.sa.sa_family == AF_INET6) { 4476 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 4477 /* Can't bind a non-existent addr. */ 4478 return; 4479 } 4480 } 4481 /* does the address already exist? */ 4482 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 4483 if (laddr->ifa == ifa) { 4484 return; 4485 } 4486 } 4487 4488 /* add to the list */ 4489 (void)sctp_insert_laddr(list, ifa, 0); 4490 return; 4491 } 4492 4493 /* 4494 * insert an laddr entry with the given ifa for the desired list 4495 */ 4496 int 4497 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 4498 { 4499 struct sctp_laddr *laddr; 4500 4501 laddr = SCTP_ZONE_GET(sctppcbinfo.ipi_zone_laddr, struct sctp_laddr); 4502 if (laddr == NULL) { 4503 /* out of memory? */ 4504 return (EINVAL); 4505 } 4506 SCTP_INCR_LADDR_COUNT(); 4507 bzero(laddr, sizeof(*laddr)); 4508 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 4509 laddr->ifa = ifa; 4510 laddr->action = act; 4511 atomic_add_int(&ifa->refcount, 1); 4512 /* insert it */ 4513 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 4514 4515 return (0); 4516 } 4517 4518 /* 4519 * Remove an laddr entry from the local address list (on an assoc) 4520 */ 4521 void 4522 sctp_remove_laddr(struct sctp_laddr *laddr) 4523 { 4524 4525 /* remove from the list */ 4526 LIST_REMOVE(laddr, sctp_nxt_addr); 4527 sctp_free_ifa(laddr->ifa); 4528 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_laddr, laddr); 4529 SCTP_DECR_LADDR_COUNT(); 4530 } 4531 4532 /* 4533 * Remove an address from the TCB local address list 4534 */ 4535 void 4536 sctp_del_local_addr_assoc(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 4537 { 4538 struct sctp_inpcb *inp; 4539 struct sctp_laddr *laddr; 4540 4541 /* 4542 * This is called by asconf work. It is assumed that a) The TCB is 4543 * locked and b) The INP is locked. This is true in as much as I can 4544 * trace through the entry asconf code where I did these locks. 4545 * Again, the ASCONF code is a bit different in that it does lock 4546 * the INP during its work often times. This must be since we don't 4547 * want other proc's looking up things while what they are looking 4548 * up is changing :-D 4549 */ 4550 4551 inp = stcb->sctp_ep; 4552 /* if subset bound and don't allow ASCONF's, can't delete last */ 4553 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 4554 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 4555 if (stcb->sctp_ep->laddr_count < 2) { 4556 /* can't delete last address */ 4557 return; 4558 } 4559 } 4560 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 4561 /* remove the address if it exists */ 4562 if (laddr->ifa == NULL) 4563 continue; 4564 if (laddr->ifa == ifa) { 4565 sctp_remove_laddr(laddr); 4566 return; 4567 } 4568 } 4569 4570 /* address not found! */ 4571 return; 4572 } 4573 4574 static char sctp_pcb_initialized = 0; 4575 4576 /* 4577 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 4578 */ 4579 /* sysctl */ 4580 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 4581 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 4582 4583 void 4584 sctp_pcb_init() 4585 { 4586 /* 4587 * SCTP initialization for the PCB structures should be called by 4588 * the sctp_init() funciton. 4589 */ 4590 int i; 4591 4592 if (sctp_pcb_initialized != 0) { 4593 /* error I was called twice */ 4594 return; 4595 } 4596 sctp_pcb_initialized = 1; 4597 4598 bzero(&sctpstat, sizeof(struct sctpstat)); 4599 (void)SCTP_GETTIME_TIMEVAL(&sctpstat.sctps_discontinuitytime); 4600 /* init the empty list of (All) Endpoints */ 4601 LIST_INIT(&sctppcbinfo.listhead); 4602 4603 /* init the iterator head */ 4604 TAILQ_INIT(&sctppcbinfo.iteratorhead); 4605 4606 /* init the hash table of endpoints */ 4607 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &sctp_hashtblsize); 4608 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &sctp_pcbtblsize); 4609 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &sctp_chunkscale); 4610 sctppcbinfo.sctp_asochash = SCTP_HASH_INIT((sctp_hashtblsize * 31), 4611 &sctppcbinfo.hashasocmark); 4612 sctppcbinfo.sctp_ephash = SCTP_HASH_INIT(sctp_hashtblsize, 4613 &sctppcbinfo.hashmark); 4614 sctppcbinfo.sctp_tcpephash = SCTP_HASH_INIT(sctp_hashtblsize, 4615 &sctppcbinfo.hashtcpmark); 4616 sctppcbinfo.hashtblsize = sctp_hashtblsize; 4617 4618 /* init the small hash table we use to track restarted asoc's */ 4619 sctppcbinfo.sctp_restarthash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, 4620 &sctppcbinfo.hashrestartmark); 4621 4622 4623 sctppcbinfo.sctp_vrfhash = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 4624 &sctppcbinfo.hashvrfmark); 4625 4626 sctppcbinfo.vrf_ifn_hash = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 4627 &sctppcbinfo.vrf_ifn_hashmark); 4628 4629 /* init the zones */ 4630 /* 4631 * FIX ME: Should check for NULL returns, but if it does fail we are 4632 * doomed to panic anyways... add later maybe. 4633 */ 4634 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_ep, "sctp_ep", 4635 sizeof(struct sctp_inpcb), maxsockets); 4636 4637 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_asoc, "sctp_asoc", 4638 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 4639 4640 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_laddr, "sctp_laddr", 4641 sizeof(struct sctp_laddr), 4642 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 4643 4644 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_net, "sctp_raddr", 4645 sizeof(struct sctp_nets), 4646 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 4647 4648 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_chunk, "sctp_chunk", 4649 sizeof(struct sctp_tmit_chunk), 4650 (sctp_max_number_of_assoc * sctp_chunkscale)); 4651 4652 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_readq, "sctp_readq", 4653 sizeof(struct sctp_queued_to_read), 4654 (sctp_max_number_of_assoc * sctp_chunkscale)); 4655 4656 SCTP_ZONE_INIT(sctppcbinfo.ipi_zone_strmoq, "sctp_stream_msg_out", 4657 sizeof(struct sctp_stream_queue_pending), 4658 (sctp_max_number_of_assoc * sctp_chunkscale)); 4659 4660 /* Master Lock INIT for info structure */ 4661 SCTP_INP_INFO_LOCK_INIT(); 4662 SCTP_STATLOG_INIT_LOCK(); 4663 SCTP_ITERATOR_LOCK_INIT(); 4664 4665 SCTP_IPI_COUNT_INIT(); 4666 SCTP_IPI_ADDR_INIT(); 4667 SCTP_IPI_ITERATOR_WQ_INIT(); 4668 #ifdef SCTP_PACKET_LOGGING 4669 SCTP_IP_PKTLOG_INIT(); 4670 #endif 4671 LIST_INIT(&sctppcbinfo.addr_wq); 4672 4673 /* not sure if we need all the counts */ 4674 sctppcbinfo.ipi_count_ep = 0; 4675 /* assoc/tcb zone info */ 4676 sctppcbinfo.ipi_count_asoc = 0; 4677 /* local addrlist zone info */ 4678 sctppcbinfo.ipi_count_laddr = 0; 4679 /* remote addrlist zone info */ 4680 sctppcbinfo.ipi_count_raddr = 0; 4681 /* chunk info */ 4682 sctppcbinfo.ipi_count_chunk = 0; 4683 4684 /* socket queue zone info */ 4685 sctppcbinfo.ipi_count_readq = 0; 4686 4687 /* stream out queue cont */ 4688 sctppcbinfo.ipi_count_strmoq = 0; 4689 4690 sctppcbinfo.ipi_free_strmoq = 0; 4691 sctppcbinfo.ipi_free_chunks = 0; 4692 4693 SCTP_OS_TIMER_INIT(&sctppcbinfo.addr_wq_timer.timer); 4694 4695 /* Init the TIMEWAIT list */ 4696 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) { 4697 LIST_INIT(&sctppcbinfo.vtag_timewait[i]); 4698 } 4699 4700 #if defined(SCTP_USE_THREAD_BASED_ITERATOR) 4701 sctppcbinfo.iterator_running = 0; 4702 sctp_startup_iterator(); 4703 #endif 4704 4705 /* 4706 * INIT the default VRF which for BSD is the only one, other O/S's 4707 * may have more. But initially they must start with one and then 4708 * add the VRF's as addresses are added. 4709 */ 4710 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 4711 4712 } 4713 4714 4715 int 4716 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 4717 int iphlen, int offset, int limit, struct sctphdr *sh, 4718 struct sockaddr *altsa) 4719 { 4720 /* 4721 * grub through the INIT pulling addresses and loading them to the 4722 * nets structure in the asoc. The from address in the mbuf should 4723 * also be loaded (if it is not already). This routine can be called 4724 * with either INIT or INIT-ACK's as long as the m points to the IP 4725 * packet and the offset points to the beginning of the parameters. 4726 */ 4727 struct sctp_inpcb *inp, *l_inp; 4728 struct sctp_nets *net, *net_tmp; 4729 struct ip *iph; 4730 struct sctp_paramhdr *phdr, parm_buf; 4731 struct sctp_tcb *stcb_tmp; 4732 uint16_t ptype, plen; 4733 struct sockaddr *sa; 4734 struct sockaddr_storage dest_store; 4735 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 4736 struct sockaddr_in sin; 4737 struct sockaddr_in6 sin6; 4738 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 4739 struct sctp_auth_random *p_random = NULL; 4740 uint16_t random_len = 0; 4741 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 4742 struct sctp_auth_hmac_algo *hmacs = NULL; 4743 uint16_t hmacs_len = 0; 4744 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 4745 struct sctp_auth_chunk_list *chunks = NULL; 4746 uint16_t num_chunks = 0; 4747 sctp_key_t *new_key; 4748 uint32_t keylen; 4749 int got_random = 0, got_hmacs = 0, got_chklist = 0; 4750 4751 /* First get the destination address setup too. */ 4752 memset(&sin, 0, sizeof(sin)); 4753 memset(&sin6, 0, sizeof(sin6)); 4754 4755 sin.sin_family = AF_INET; 4756 sin.sin_len = sizeof(sin); 4757 sin.sin_port = stcb->rport; 4758 4759 sin6.sin6_family = AF_INET6; 4760 sin6.sin6_len = sizeof(struct sockaddr_in6); 4761 sin6.sin6_port = stcb->rport; 4762 if (altsa == NULL) { 4763 iph = mtod(m, struct ip *); 4764 if (iph->ip_v == IPVERSION) { 4765 /* its IPv4 */ 4766 struct sockaddr_in *sin_2; 4767 4768 sin_2 = (struct sockaddr_in *)(local_sa); 4769 memset(sin_2, 0, sizeof(sin)); 4770 sin_2->sin_family = AF_INET; 4771 sin_2->sin_len = sizeof(sin); 4772 sin_2->sin_port = sh->dest_port; 4773 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 4774 sin.sin_addr = iph->ip_src; 4775 sa = (struct sockaddr *)&sin; 4776 } else if (iph->ip_v == (IPV6_VERSION >> 4)) { 4777 /* its IPv6 */ 4778 struct ip6_hdr *ip6; 4779 struct sockaddr_in6 *sin6_2; 4780 4781 ip6 = mtod(m, struct ip6_hdr *); 4782 sin6_2 = (struct sockaddr_in6 *)(local_sa); 4783 memset(sin6_2, 0, sizeof(sin6)); 4784 sin6_2->sin6_family = AF_INET6; 4785 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 4786 sin6_2->sin6_port = sh->dest_port; 4787 sin6.sin6_addr = ip6->ip6_src; 4788 sa = (struct sockaddr *)&sin6; 4789 } else { 4790 sa = NULL; 4791 } 4792 } else { 4793 /* 4794 * For cookies we use the src address NOT from the packet 4795 * but from the original INIT 4796 */ 4797 sa = altsa; 4798 } 4799 /* Turn off ECN until we get through all params */ 4800 stcb->asoc.ecn_allowed = 0; 4801 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 4802 /* mark all addresses that we have currently on the list */ 4803 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 4804 } 4805 /* does the source address already exist? if so skip it */ 4806 l_inp = inp = stcb->sctp_ep; 4807 4808 atomic_add_int(&stcb->asoc.refcnt, 1); 4809 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 4810 atomic_add_int(&stcb->asoc.refcnt, -1); 4811 4812 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 4813 /* we must add the source address */ 4814 /* no scope set here since we have a tcb already. */ 4815 if ((sa->sa_family == AF_INET) && 4816 (stcb->asoc.ipv4_addr_legal)) { 4817 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 4818 return (-1); 4819 } 4820 } else if ((sa->sa_family == AF_INET6) && 4821 (stcb->asoc.ipv6_addr_legal)) { 4822 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 4823 return (-2); 4824 } 4825 } 4826 } else { 4827 if (net_tmp != NULL && stcb_tmp == stcb) { 4828 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 4829 } else if (stcb_tmp != stcb) { 4830 /* It belongs to another association? */ 4831 if (stcb_tmp) 4832 SCTP_TCB_UNLOCK(stcb_tmp); 4833 return (-3); 4834 } 4835 } 4836 if (stcb->asoc.state == 0) { 4837 /* the assoc was freed? */ 4838 return (-4); 4839 } 4840 /* 4841 * peer must explicitly turn this on. This may have been initialized 4842 * to be "on" in order to allow local addr changes while INIT's are 4843 * in flight. 4844 */ 4845 stcb->asoc.peer_supports_asconf = 0; 4846 /* now we must go through each of the params. */ 4847 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 4848 while (phdr) { 4849 ptype = ntohs(phdr->param_type); 4850 plen = ntohs(phdr->param_length); 4851 /* 4852 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 4853 * (int)plen); 4854 */ 4855 if (offset + plen > limit) { 4856 break; 4857 } 4858 if (plen == 0) { 4859 break; 4860 } 4861 if (ptype == SCTP_IPV4_ADDRESS) { 4862 if (stcb->asoc.ipv4_addr_legal) { 4863 struct sctp_ipv4addr_param *p4, p4_buf; 4864 4865 /* ok get the v4 address and check/add */ 4866 phdr = sctp_get_next_param(m, offset, 4867 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 4868 if (plen != sizeof(struct sctp_ipv4addr_param) || 4869 phdr == NULL) { 4870 return (-5); 4871 } 4872 p4 = (struct sctp_ipv4addr_param *)phdr; 4873 sin.sin_addr.s_addr = p4->addr; 4874 if (IN_MULTICAST(sin.sin_addr.s_addr)) { 4875 /* Skip multi-cast addresses */ 4876 goto next_param; 4877 } 4878 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 4879 (sin.sin_addr.s_addr == INADDR_ANY)) { 4880 goto next_param; 4881 } 4882 sa = (struct sockaddr *)&sin; 4883 inp = stcb->sctp_ep; 4884 atomic_add_int(&stcb->asoc.refcnt, 1); 4885 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 4886 local_sa, stcb); 4887 atomic_add_int(&stcb->asoc.refcnt, -1); 4888 4889 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 4890 inp == NULL) { 4891 /* we must add the source address */ 4892 /* 4893 * no scope set since we have a tcb 4894 * already 4895 */ 4896 4897 /* 4898 * we must validate the state again 4899 * here 4900 */ 4901 if (stcb->asoc.state == 0) { 4902 /* the assoc was freed? */ 4903 return (-7); 4904 } 4905 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 4906 return (-8); 4907 } 4908 } else if (stcb_tmp == stcb) { 4909 if (stcb->asoc.state == 0) { 4910 /* the assoc was freed? */ 4911 return (-10); 4912 } 4913 if (net != NULL) { 4914 /* clear flag */ 4915 net->dest_state &= 4916 ~SCTP_ADDR_NOT_IN_ASSOC; 4917 } 4918 } else { 4919 /* 4920 * strange, address is in another 4921 * assoc? straighten out locks. 4922 */ 4923 SCTP_TCB_UNLOCK(stcb_tmp); 4924 if (stcb->asoc.state == 0) { 4925 /* the assoc was freed? */ 4926 return (-12); 4927 } 4928 return (-13); 4929 } 4930 } 4931 } else if (ptype == SCTP_IPV6_ADDRESS) { 4932 if (stcb->asoc.ipv6_addr_legal) { 4933 /* ok get the v6 address and check/add */ 4934 struct sctp_ipv6addr_param *p6, p6_buf; 4935 4936 phdr = sctp_get_next_param(m, offset, 4937 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 4938 if (plen != sizeof(struct sctp_ipv6addr_param) || 4939 phdr == NULL) { 4940 return (-14); 4941 } 4942 p6 = (struct sctp_ipv6addr_param *)phdr; 4943 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 4944 sizeof(p6->addr)); 4945 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 4946 /* Skip multi-cast addresses */ 4947 goto next_param; 4948 } 4949 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 4950 /* 4951 * Link local make no sense without 4952 * scope 4953 */ 4954 goto next_param; 4955 } 4956 sa = (struct sockaddr *)&sin6; 4957 inp = stcb->sctp_ep; 4958 atomic_add_int(&stcb->asoc.refcnt, 1); 4959 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 4960 local_sa, stcb); 4961 atomic_add_int(&stcb->asoc.refcnt, -1); 4962 if (stcb_tmp == NULL && (inp == stcb->sctp_ep || 4963 inp == NULL)) { 4964 /* 4965 * we must validate the state again 4966 * here 4967 */ 4968 if (stcb->asoc.state == 0) { 4969 /* the assoc was freed? */ 4970 return (-16); 4971 } 4972 /* 4973 * we must add the address, no scope 4974 * set 4975 */ 4976 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 4977 return (-17); 4978 } 4979 } else if (stcb_tmp == stcb) { 4980 /* 4981 * we must validate the state again 4982 * here 4983 */ 4984 if (stcb->asoc.state == 0) { 4985 /* the assoc was freed? */ 4986 return (-19); 4987 } 4988 if (net != NULL) { 4989 /* clear flag */ 4990 net->dest_state &= 4991 ~SCTP_ADDR_NOT_IN_ASSOC; 4992 } 4993 } else { 4994 /* 4995 * strange, address is in another 4996 * assoc? straighten out locks. 4997 */ 4998 SCTP_TCB_UNLOCK(stcb_tmp); 4999 if (stcb->asoc.state == 0) { 5000 /* the assoc was freed? */ 5001 return (-21); 5002 } 5003 return (-22); 5004 } 5005 } 5006 } else if (ptype == SCTP_ECN_CAPABLE) { 5007 stcb->asoc.ecn_allowed = 1; 5008 } else if (ptype == SCTP_ULP_ADAPTATION) { 5009 if (stcb->asoc.state != SCTP_STATE_OPEN) { 5010 struct sctp_adaptation_layer_indication ai, 5011 *aip; 5012 5013 phdr = sctp_get_next_param(m, offset, 5014 (struct sctp_paramhdr *)&ai, sizeof(ai)); 5015 aip = (struct sctp_adaptation_layer_indication *)phdr; 5016 if (aip) { 5017 sctp_ulp_notify(SCTP_NOTIFY_ADAPTATION_INDICATION, 5018 stcb, ntohl(aip->indication), NULL); 5019 } 5020 } 5021 } else if (ptype == SCTP_SET_PRIM_ADDR) { 5022 struct sctp_asconf_addr_param lstore, *fee; 5023 struct sctp_asconf_addrv4_param *fii; 5024 int lptype; 5025 struct sockaddr *lsa = NULL; 5026 5027 stcb->asoc.peer_supports_asconf = 1; 5028 if (plen > sizeof(lstore)) { 5029 return (-23); 5030 } 5031 phdr = sctp_get_next_param(m, offset, 5032 (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore))); 5033 if (phdr == NULL) { 5034 return (-24); 5035 } 5036 fee = (struct sctp_asconf_addr_param *)phdr; 5037 lptype = ntohs(fee->addrp.ph.param_type); 5038 if (lptype == SCTP_IPV4_ADDRESS) { 5039 if (plen != 5040 sizeof(struct sctp_asconf_addrv4_param)) { 5041 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 5042 (int)sizeof(struct sctp_asconf_addrv4_param), 5043 plen); 5044 } else { 5045 fii = (struct sctp_asconf_addrv4_param *)fee; 5046 sin.sin_addr.s_addr = fii->addrp.addr; 5047 lsa = (struct sockaddr *)&sin; 5048 } 5049 } else if (lptype == SCTP_IPV6_ADDRESS) { 5050 if (plen != 5051 sizeof(struct sctp_asconf_addr_param)) { 5052 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 5053 (int)sizeof(struct sctp_asconf_addr_param), 5054 plen); 5055 } else { 5056 memcpy(sin6.sin6_addr.s6_addr, 5057 fee->addrp.addr, 5058 sizeof(fee->addrp.addr)); 5059 lsa = (struct sockaddr *)&sin6; 5060 } 5061 } 5062 if (lsa) { 5063 (void)sctp_set_primary_addr(stcb, sa, NULL); 5064 } 5065 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 5066 /* Peer supports pr-sctp */ 5067 stcb->asoc.peer_supports_prsctp = 1; 5068 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 5069 /* A supported extension chunk */ 5070 struct sctp_supported_chunk_types_param *pr_supported; 5071 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 5072 int num_ent, i; 5073 5074 phdr = sctp_get_next_param(m, offset, 5075 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 5076 if (phdr == NULL) { 5077 return (-25); 5078 } 5079 stcb->asoc.peer_supports_asconf = 0; 5080 stcb->asoc.peer_supports_prsctp = 0; 5081 stcb->asoc.peer_supports_pktdrop = 0; 5082 stcb->asoc.peer_supports_strreset = 0; 5083 stcb->asoc.peer_supports_auth = 0; 5084 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 5085 num_ent = plen - sizeof(struct sctp_paramhdr); 5086 for (i = 0; i < num_ent; i++) { 5087 switch (pr_supported->chunk_types[i]) { 5088 case SCTP_ASCONF: 5089 case SCTP_ASCONF_ACK: 5090 stcb->asoc.peer_supports_asconf = 1; 5091 break; 5092 case SCTP_FORWARD_CUM_TSN: 5093 stcb->asoc.peer_supports_prsctp = 1; 5094 break; 5095 case SCTP_PACKET_DROPPED: 5096 stcb->asoc.peer_supports_pktdrop = 1; 5097 break; 5098 case SCTP_STREAM_RESET: 5099 stcb->asoc.peer_supports_strreset = 1; 5100 break; 5101 case SCTP_AUTHENTICATION: 5102 stcb->asoc.peer_supports_auth = 1; 5103 break; 5104 default: 5105 /* one I have not learned yet */ 5106 break; 5107 5108 } 5109 } 5110 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 5111 /* Peer supports ECN-nonce */ 5112 stcb->asoc.peer_supports_ecn_nonce = 1; 5113 stcb->asoc.ecn_nonce_allowed = 1; 5114 } else if (ptype == SCTP_RANDOM) { 5115 if (plen > sizeof(random_store)) 5116 break; 5117 if (got_random) { 5118 /* already processed a RANDOM */ 5119 goto next_param; 5120 } 5121 phdr = sctp_get_next_param(m, offset, 5122 (struct sctp_paramhdr *)random_store, 5123 min(sizeof(random_store), plen)); 5124 if (phdr == NULL) 5125 return (-26); 5126 p_random = (struct sctp_auth_random *)phdr; 5127 random_len = plen - sizeof(*p_random); 5128 /* enforce the random length */ 5129 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 5130 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 5131 return (-27); 5132 } 5133 got_random = 1; 5134 } else if (ptype == SCTP_HMAC_LIST) { 5135 int num_hmacs; 5136 int i; 5137 5138 if (plen > sizeof(hmacs_store)) 5139 break; 5140 if (got_hmacs) { 5141 /* already processed a HMAC list */ 5142 goto next_param; 5143 } 5144 phdr = sctp_get_next_param(m, offset, 5145 (struct sctp_paramhdr *)hmacs_store, 5146 min(plen, sizeof(hmacs_store))); 5147 if (phdr == NULL) 5148 return (-28); 5149 hmacs = (struct sctp_auth_hmac_algo *)phdr; 5150 hmacs_len = plen - sizeof(*hmacs); 5151 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 5152 /* validate the hmac list */ 5153 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 5154 return (-29); 5155 } 5156 if (stcb->asoc.peer_hmacs != NULL) 5157 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 5158 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 5159 if (stcb->asoc.peer_hmacs != NULL) { 5160 for (i = 0; i < num_hmacs; i++) { 5161 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 5162 ntohs(hmacs->hmac_ids[i])); 5163 } 5164 } 5165 got_hmacs = 1; 5166 } else if (ptype == SCTP_CHUNK_LIST) { 5167 int i; 5168 5169 if (plen > sizeof(chunks_store)) 5170 break; 5171 if (got_chklist) { 5172 /* already processed a Chunks list */ 5173 goto next_param; 5174 } 5175 phdr = sctp_get_next_param(m, offset, 5176 (struct sctp_paramhdr *)chunks_store, 5177 min(plen, sizeof(chunks_store))); 5178 if (phdr == NULL) 5179 return (-30); 5180 chunks = (struct sctp_auth_chunk_list *)phdr; 5181 num_chunks = plen - sizeof(*chunks); 5182 if (stcb->asoc.peer_auth_chunks != NULL) 5183 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 5184 else 5185 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 5186 for (i = 0; i < num_chunks; i++) { 5187 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 5188 stcb->asoc.peer_auth_chunks); 5189 } 5190 got_chklist = 1; 5191 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 5192 (ptype == SCTP_STATE_COOKIE) || 5193 (ptype == SCTP_UNRECOG_PARAM) || 5194 (ptype == SCTP_COOKIE_PRESERVE) || 5195 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 5196 (ptype == SCTP_ADD_IP_ADDRESS) || 5197 (ptype == SCTP_DEL_IP_ADDRESS) || 5198 (ptype == SCTP_ERROR_CAUSE_IND) || 5199 (ptype == SCTP_SUCCESS_REPORT)) { 5200 /* don't care */ ; 5201 } else { 5202 if ((ptype & 0x8000) == 0x0000) { 5203 /* 5204 * must stop processing the rest of the 5205 * param's. Any report bits were handled 5206 * with the call to 5207 * sctp_arethere_unrecognized_parameters() 5208 * when the INIT or INIT-ACK was first seen. 5209 */ 5210 break; 5211 } 5212 } 5213 next_param: 5214 offset += SCTP_SIZE32(plen); 5215 if (offset >= limit) { 5216 break; 5217 } 5218 phdr = sctp_get_next_param(m, offset, &parm_buf, 5219 sizeof(parm_buf)); 5220 } 5221 /* Now check to see if we need to purge any addresses */ 5222 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { 5223 net_tmp = TAILQ_NEXT(net, sctp_next); 5224 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 5225 SCTP_ADDR_NOT_IN_ASSOC) { 5226 /* This address has been removed from the asoc */ 5227 /* remove and free it */ 5228 stcb->asoc.numnets--; 5229 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 5230 sctp_free_remote_addr(net); 5231 if (net == stcb->asoc.primary_destination) { 5232 stcb->asoc.primary_destination = NULL; 5233 sctp_select_primary_destination(stcb); 5234 } 5235 } 5236 } 5237 /* validate authentication required parameters */ 5238 if (got_random && got_hmacs) { 5239 stcb->asoc.peer_supports_auth = 1; 5240 } else { 5241 stcb->asoc.peer_supports_auth = 0; 5242 } 5243 if (!stcb->asoc.peer_supports_auth && got_chklist) { 5244 /* peer does not support auth but sent a chunks list? */ 5245 return (-31); 5246 } 5247 if (!sctp_asconf_auth_nochk && stcb->asoc.peer_supports_asconf && 5248 !stcb->asoc.peer_supports_auth) { 5249 /* peer supports asconf but not auth? */ 5250 return (-32); 5251 } 5252 /* concatenate the full random key */ 5253 #ifdef SCTP_AUTH_DRAFT_04 5254 keylen = random_len; 5255 new_key = sctp_alloc_key(keylen); 5256 if (new_key != NULL) { 5257 /* copy in the RANDOM */ 5258 if (p_random != NULL) 5259 bcopy(p_random->random_data, new_key->key, random_len); 5260 } 5261 #else 5262 keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks + 5263 sizeof(*hmacs) + hmacs_len; 5264 new_key = sctp_alloc_key(keylen); 5265 if (new_key != NULL) { 5266 /* copy in the RANDOM */ 5267 if (p_random != NULL) { 5268 keylen = sizeof(*p_random) + random_len; 5269 bcopy(p_random, new_key->key, keylen); 5270 } 5271 /* append in the AUTH chunks */ 5272 if (chunks != NULL) { 5273 bcopy(chunks, new_key->key + keylen, 5274 sizeof(*chunks) + num_chunks); 5275 keylen += sizeof(*chunks) + num_chunks; 5276 } 5277 /* append in the HMACs */ 5278 if (hmacs != NULL) { 5279 bcopy(hmacs, new_key->key + keylen, 5280 sizeof(*hmacs) + hmacs_len); 5281 } 5282 } 5283 #endif 5284 else { 5285 /* failed to get memory for the key */ 5286 return (-33); 5287 } 5288 if (stcb->asoc.authinfo.peer_random != NULL) 5289 sctp_free_key(stcb->asoc.authinfo.peer_random); 5290 stcb->asoc.authinfo.peer_random = new_key; 5291 #ifdef SCTP_AUTH_DRAFT_04 5292 /* don't include the chunks and hmacs for draft -04 */ 5293 stcb->asoc.authinfo.peer_random->keylen = random_len; 5294 #endif 5295 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 5296 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 5297 5298 return (0); 5299 } 5300 5301 int 5302 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 5303 struct sctp_nets *net) 5304 { 5305 /* make sure the requested primary address exists in the assoc */ 5306 if (net == NULL && sa) 5307 net = sctp_findnet(stcb, sa); 5308 5309 if (net == NULL) { 5310 /* didn't find the requested primary address! */ 5311 return (-1); 5312 } else { 5313 /* set the primary address */ 5314 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 5315 /* Must be confirmed, so queue to set */ 5316 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 5317 return (0); 5318 } 5319 stcb->asoc.primary_destination = net; 5320 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 5321 net = TAILQ_FIRST(&stcb->asoc.nets); 5322 if (net != stcb->asoc.primary_destination) { 5323 /* 5324 * first one on the list is NOT the primary 5325 * sctp_cmpaddr() is much more efficent if the 5326 * primary is the first on the list, make it so. 5327 */ 5328 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 5329 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 5330 } 5331 return (0); 5332 } 5333 } 5334 5335 5336 int 5337 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now) 5338 { 5339 /* 5340 * This function serves two purposes. It will see if a TAG can be 5341 * re-used and return 1 for yes it is ok and 0 for don't use that 5342 * tag. A secondary function it will do is purge out old tags that 5343 * can be removed. 5344 */ 5345 struct sctpasochead *head; 5346 struct sctpvtaghead *chain; 5347 struct sctp_tagblock *twait_block; 5348 struct sctp_tcb *stcb; 5349 int i; 5350 5351 SCTP_INP_INFO_WLOCK(); 5352 chain = &sctppcbinfo.vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 5353 /* First is the vtag in use ? */ 5354 5355 head = &sctppcbinfo.sctp_asochash[SCTP_PCBHASH_ASOC(tag, 5356 sctppcbinfo.hashasocmark)]; 5357 if (head == NULL) { 5358 goto check_restart; 5359 } 5360 LIST_FOREACH(stcb, head, sctp_asocs) { 5361 5362 if (stcb->asoc.my_vtag == tag) { 5363 /* 5364 * We should remove this if and return 0 always if 5365 * we want vtags unique across all endpoints. For 5366 * now within a endpoint is ok. 5367 */ 5368 if (inp == stcb->sctp_ep) { 5369 /* bad tag, in use */ 5370 SCTP_INP_INFO_WUNLOCK(); 5371 return (0); 5372 } 5373 } 5374 } 5375 check_restart: 5376 /* Now lets check the restart hash */ 5377 head = &sctppcbinfo.sctp_restarthash[SCTP_PCBHASH_ASOC(tag, 5378 sctppcbinfo.hashrestartmark)]; 5379 if (head == NULL) { 5380 goto check_time_wait; 5381 } 5382 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { 5383 if (stcb->asoc.assoc_id == tag) { 5384 /* candidate */ 5385 if (inp == stcb->sctp_ep) { 5386 /* bad tag, in use */ 5387 SCTP_INP_INFO_WUNLOCK(); 5388 return (0); 5389 } 5390 } 5391 } 5392 check_time_wait: 5393 /* Now what about timed wait ? */ 5394 if (!SCTP_LIST_EMPTY(chain)) { 5395 /* 5396 * Block(s) are present, lets see if we have this tag in the 5397 * list 5398 */ 5399 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5400 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 5401 if (twait_block->vtag_block[i].v_tag == 0) { 5402 /* not used */ 5403 continue; 5404 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire > 5405 now->tv_sec) { 5406 /* Audit expires this guy */ 5407 twait_block->vtag_block[i].tv_sec_at_expire = 0; 5408 twait_block->vtag_block[i].v_tag = 0; 5409 } else if (twait_block->vtag_block[i].v_tag == 5410 tag) { 5411 /* Bad tag, sorry :< */ 5412 SCTP_INP_INFO_WUNLOCK(); 5413 return (0); 5414 } 5415 } 5416 } 5417 } 5418 /* Not found, ok to use the tag */ 5419 SCTP_INP_INFO_WUNLOCK(); 5420 return (1); 5421 } 5422 5423 5424 static sctp_assoc_t reneged_asoc_ids[256]; 5425 static uint8_t reneged_at = 0; 5426 5427 5428 static void 5429 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 5430 { 5431 /* 5432 * We must hunt this association for MBUF's past the cumack (i.e. 5433 * out of order data that we can renege on). 5434 */ 5435 struct sctp_association *asoc; 5436 struct sctp_tmit_chunk *chk, *nchk; 5437 uint32_t cumulative_tsn_p1, tsn; 5438 struct sctp_queued_to_read *ctl, *nctl; 5439 int cnt, strmat, gap; 5440 5441 /* We look for anything larger than the cum-ack + 1 */ 5442 5443 SCTP_STAT_INCR(sctps_protocol_drain_calls); 5444 if (sctp_do_drain == 0) { 5445 return; 5446 } 5447 asoc = &stcb->asoc; 5448 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 5449 /* none we can reneg on. */ 5450 return; 5451 } 5452 SCTP_STAT_INCR(sctps_protocol_drains_done); 5453 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 5454 cnt = 0; 5455 /* First look in the re-assembly queue */ 5456 chk = TAILQ_FIRST(&asoc->reasmqueue); 5457 while (chk) { 5458 /* Get the next one */ 5459 nchk = TAILQ_NEXT(chk, sctp_next); 5460 if (compare_with_wrap(chk->rec.data.TSN_seq, 5461 cumulative_tsn_p1, MAX_TSN)) { 5462 /* Yep it is above cum-ack */ 5463 cnt++; 5464 tsn = chk->rec.data.TSN_seq; 5465 if (tsn >= asoc->mapping_array_base_tsn) { 5466 gap = tsn - asoc->mapping_array_base_tsn; 5467 } else { 5468 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 5469 tsn + 1; 5470 } 5471 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 5472 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 5473 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 5474 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5475 if (chk->data) { 5476 sctp_m_freem(chk->data); 5477 chk->data = NULL; 5478 } 5479 sctp_free_a_chunk(stcb, chk); 5480 } 5481 chk = nchk; 5482 } 5483 /* Ok that was fun, now we will drain all the inbound streams? */ 5484 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 5485 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); 5486 while (ctl) { 5487 nctl = TAILQ_NEXT(ctl, next); 5488 if (compare_with_wrap(ctl->sinfo_tsn, 5489 cumulative_tsn_p1, MAX_TSN)) { 5490 /* Yep it is above cum-ack */ 5491 cnt++; 5492 tsn = ctl->sinfo_tsn; 5493 if (tsn >= asoc->mapping_array_base_tsn) { 5494 gap = tsn - 5495 asoc->mapping_array_base_tsn; 5496 } else { 5497 gap = (MAX_TSN - 5498 asoc->mapping_array_base_tsn) + 5499 tsn + 1; 5500 } 5501 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 5502 sctp_ucount_decr(asoc->cnt_on_all_streams); 5503 5504 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, 5505 gap); 5506 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, 5507 ctl, next); 5508 if (ctl->data) { 5509 sctp_m_freem(ctl->data); 5510 ctl->data = NULL; 5511 } 5512 sctp_free_remote_addr(ctl->whoFrom); 5513 SCTP_ZONE_FREE(sctppcbinfo.ipi_zone_readq, ctl); 5514 SCTP_DECR_READQ_COUNT(); 5515 } 5516 ctl = nctl; 5517 } 5518 } 5519 /* 5520 * Question, should we go through the delivery queue? The only 5521 * reason things are on here is the app not reading OR a p-d-api up. 5522 * An attacker COULD send enough in to initiate the PD-API and then 5523 * send a bunch of stuff to other streams... these would wind up on 5524 * the delivery queue.. and then we would not get to them. But in 5525 * order to do this I then have to back-track and un-deliver 5526 * sequence numbers in streams.. el-yucko. I think for now we will 5527 * NOT look at the delivery queue and leave it to be something to 5528 * consider later. An alternative would be to abort the P-D-API with 5529 * a notification and then deliver the data.... Or another method 5530 * might be to keep track of how many times the situation occurs and 5531 * if we see a possible attack underway just abort the association. 5532 */ 5533 #ifdef SCTP_DEBUG 5534 if (cnt) { 5535 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 5536 } 5537 #endif 5538 if (cnt) { 5539 /* 5540 * Now do we need to find a new 5541 * asoc->highest_tsn_inside_map? 5542 */ 5543 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) { 5544 gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn; 5545 } else { 5546 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 5547 asoc->highest_tsn_inside_map + 1; 5548 } 5549 if (gap >= (asoc->mapping_array_size << 3)) { 5550 /* 5551 * Something bad happened or cum-ack and high were 5552 * behind the base, but if so earlier checks should 5553 * have found NO data... wierd... we will start at 5554 * end of mapping array. 5555 */ 5556 SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n", 5557 (int)gap, 5558 (int)(asoc->mapping_array_size << 3), 5559 (int)asoc->highest_tsn_inside_map); 5560 gap = asoc->mapping_array_size << 3; 5561 } 5562 while (gap > 0) { 5563 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 5564 /* found the new highest */ 5565 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap; 5566 break; 5567 } 5568 gap--; 5569 } 5570 if (gap == 0) { 5571 /* Nothing left in map */ 5572 memset(asoc->mapping_array, 0, asoc->mapping_array_size); 5573 asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1; 5574 asoc->highest_tsn_inside_map = asoc->cumulative_tsn; 5575 } 5576 asoc->last_revoke_count = cnt; 5577 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 5578 sctp_send_sack(stcb); 5579 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN); 5580 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 5581 reneged_at++; 5582 } 5583 /* 5584 * Another issue, in un-setting the TSN's in the mapping array we 5585 * DID NOT adjust the higest_tsn marker. This will cause one of two 5586 * things to occur. It may cause us to do extra work in checking for 5587 * our mapping array movement. More importantly it may cause us to 5588 * SACK every datagram. This may not be a bad thing though since we 5589 * will recover once we get our cum-ack above and all this stuff we 5590 * dumped recovered. 5591 */ 5592 } 5593 5594 void 5595 sctp_drain() 5596 { 5597 /* 5598 * We must walk the PCB lists for ALL associations here. The system 5599 * is LOW on MBUF's and needs help. This is where reneging will 5600 * occur. We really hope this does NOT happen! 5601 */ 5602 struct sctp_inpcb *inp; 5603 struct sctp_tcb *stcb; 5604 5605 SCTP_INP_INFO_RLOCK(); 5606 LIST_FOREACH(inp, &sctppcbinfo.listhead, sctp_list) { 5607 /* For each endpoint */ 5608 SCTP_INP_RLOCK(inp); 5609 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5610 /* For each association */ 5611 SCTP_TCB_LOCK(stcb); 5612 sctp_drain_mbufs(inp, stcb); 5613 SCTP_TCB_UNLOCK(stcb); 5614 } 5615 SCTP_INP_RUNLOCK(inp); 5616 } 5617 SCTP_INP_INFO_RUNLOCK(); 5618 } 5619 5620 /* 5621 * start a new iterator 5622 * iterates through all endpoints and associations based on the pcb_state 5623 * flags and asoc_state. "af" (mandatory) is executed for all matching 5624 * assocs and "ef" (optional) is executed when the iterator completes. 5625 * "inpf" (optional) is executed for each new endpoint as it is being 5626 * iterated through. inpe (optional) is called when the inp completes 5627 * its way through all the stcbs. 5628 */ 5629 int 5630 sctp_initiate_iterator(inp_func inpf, 5631 asoc_func af, 5632 inp_func inpe, 5633 uint32_t pcb_state, 5634 uint32_t pcb_features, 5635 uint32_t asoc_state, 5636 void *argp, 5637 uint32_t argi, 5638 end_func ef, 5639 struct sctp_inpcb *s_inp, 5640 uint8_t chunk_output_off) 5641 { 5642 struct sctp_iterator *it = NULL; 5643 5644 if (af == NULL) { 5645 return (-1); 5646 } 5647 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 5648 SCTP_M_ITER); 5649 if (it == NULL) { 5650 return (ENOMEM); 5651 } 5652 memset(it, 0, sizeof(*it)); 5653 it->function_assoc = af; 5654 it->function_inp = inpf; 5655 if (inpf) 5656 it->done_current_ep = 0; 5657 else 5658 it->done_current_ep = 1; 5659 it->function_atend = ef; 5660 it->pointer = argp; 5661 it->val = argi; 5662 it->pcb_flags = pcb_state; 5663 it->pcb_features = pcb_features; 5664 it->asoc_state = asoc_state; 5665 it->function_inp_end = inpe; 5666 it->no_chunk_output = chunk_output_off; 5667 if (s_inp) { 5668 it->inp = s_inp; 5669 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 5670 } else { 5671 SCTP_INP_INFO_RLOCK(); 5672 it->inp = LIST_FIRST(&sctppcbinfo.listhead); 5673 5674 SCTP_INP_INFO_RUNLOCK(); 5675 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 5676 5677 } 5678 SCTP_IPI_ITERATOR_WQ_LOCK(); 5679 if (it->inp) { 5680 SCTP_INP_INCR_REF(it->inp); 5681 } 5682 TAILQ_INSERT_TAIL(&sctppcbinfo.iteratorhead, it, sctp_nxt_itr); 5683 #if defined(SCTP_USE_THREAD_BASED_ITERATOR) 5684 if (sctppcbinfo.iterator_running == 0) { 5685 sctp_wakeup_iterator(); 5686 } 5687 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5688 #else 5689 if (it->inp) 5690 SCTP_INP_DECR_REF(it->inp); 5691 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5692 /* Init the timer */ 5693 SCTP_OS_TIMER_INIT(&it->tmr.timer); 5694 /* add to the list of all iterators */ 5695 sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it, 5696 NULL, NULL); 5697 #endif 5698 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 5699 return (0); 5700 } 5701