sctp_pcb.c revision 208883
1/*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * a) Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * b) Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the distribution. 13 * 14 * c) Neither the name of Cisco Systems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31/* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: head/sys/netinet/sctp_pcb.c 208883 2010-06-07 04:01:38Z rrs $"); 35 36#include <netinet/sctp_os.h> 37#include <sys/proc.h> 38#include <netinet/sctp_var.h> 39#include <netinet/sctp_sysctl.h> 40#include <netinet/sctp_pcb.h> 41#include <netinet/sctputil.h> 42#include <netinet/sctp.h> 43#include <netinet/sctp_header.h> 44#include <netinet/sctp_asconf.h> 45#include <netinet/sctp_output.h> 46#include <netinet/sctp_timer.h> 47#include <netinet/sctp_bsd_addr.h> 48#include <netinet/udp.h> 49 50 51VNET_DEFINE(struct sctp_base_info, system_base_info); 52 53/* FIX: we don't handle multiple link local scopes */ 54/* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 55#ifdef INET6 56int 57SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 58{ 59 struct sockaddr_in6 tmp_a, tmp_b; 60 61 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 62 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 63 return 0; 64 } 65 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 66 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 67 return 0; 68 } 69 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 70} 71 72#endif 73 74void 75sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 76{ 77 /* 78 * We really don't need to lock this, but I will just because it 79 * does not hurt. 80 */ 81 SCTP_INP_INFO_RLOCK(); 82 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 83 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 84 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 85 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 86 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 87 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 88 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 89 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 90 91 SCTP_INP_INFO_RUNLOCK(); 92} 93 94/* 95 * Addresses are added to VRF's (Virtual Router's). For BSD we 96 * have only the default VRF 0. We maintain a hash list of 97 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 98 * these has a list of addresses. When we add a new address 99 * to a VRF we lookup the ifn/ifn_index, if the ifn does 100 * not exist we create it and add it to the list of IFN's 101 * within the VRF. Once we have the sctp_ifn, we add the 102 * address to the list. So we look something like: 103 * 104 * hash-vrf-table 105 * vrf-> ifn-> ifn -> ifn 106 * vrf | 107 * ... +--ifa-> ifa -> ifa 108 * vrf 109 * 110 * We keep these seperate lists since the SCTP subsystem will 111 * point to these from its source address selection nets structure. 112 * When an address is deleted it does not happen right away on 113 * the SCTP side, it gets scheduled. What we do when a 114 * delete happens is immediately remove the address from 115 * the master list and decrement the refcount. As our 116 * addip iterator works through and frees the src address 117 * selection pointing to the sctp_ifa, eventually the refcount 118 * will reach 0 and we will delete it. Note that it is assumed 119 * that any locking on system level ifn/ifa is done at the 120 * caller of these functions and these routines will only 121 * lock the SCTP structures as they add or delete things. 122 * 123 * Other notes on VRF concepts. 124 * - An endpoint can be in multiple VRF's 125 * - An association lives within a VRF and only one VRF. 126 * - Any incoming packet we can deduce the VRF for by 127 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 128 * - Any downward send call or connect call must supply the 129 * VRF via ancillary data or via some sort of set default 130 * VRF socket option call (again for BSD no brainer since 131 * the VRF is always 0). 132 * - An endpoint may add multiple VRF's to it. 133 * - Listening sockets can accept associations in any 134 * of the VRF's they are in but the assoc will end up 135 * in only one VRF (gotten from the packet or connect/send). 136 * 137 */ 138 139struct sctp_vrf * 140sctp_allocate_vrf(int vrf_id) 141{ 142 struct sctp_vrf *vrf = NULL; 143 struct sctp_vrflist *bucket; 144 145 /* First allocate the VRF structure */ 146 vrf = sctp_find_vrf(vrf_id); 147 if (vrf) { 148 /* Already allocated */ 149 return (vrf); 150 } 151 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 152 SCTP_M_VRF); 153 if (vrf == NULL) { 154 /* No memory */ 155#ifdef INVARIANTS 156 panic("No memory for VRF:%d", vrf_id); 157#endif 158 return (NULL); 159 } 160 /* setup the VRF */ 161 memset(vrf, 0, sizeof(struct sctp_vrf)); 162 vrf->vrf_id = vrf_id; 163 LIST_INIT(&vrf->ifnlist); 164 vrf->total_ifa_count = 0; 165 vrf->refcount = 0; 166 /* now also setup table ids */ 167 SCTP_INIT_VRF_TABLEID(vrf); 168 /* Init the HASH of addresses */ 169 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 170 &vrf->vrf_addr_hashmark); 171 if (vrf->vrf_addr_hash == NULL) { 172 /* No memory */ 173#ifdef INVARIANTS 174 panic("No memory for VRF:%d", vrf_id); 175#endif 176 SCTP_FREE(vrf, SCTP_M_VRF); 177 return (NULL); 178 } 179 /* Add it to the hash table */ 180 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 181 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 182 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 183 return (vrf); 184} 185 186 187struct sctp_ifn * 188sctp_find_ifn(void *ifn, uint32_t ifn_index) 189{ 190 struct sctp_ifn *sctp_ifnp; 191 struct sctp_ifnlist *hash_ifn_head; 192 193 /* 194 * We assume the lock is held for the addresses if thats wrong 195 * problems could occur :-) 196 */ 197 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 198 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 199 if (sctp_ifnp->ifn_index == ifn_index) { 200 return (sctp_ifnp); 201 } 202 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 203 return (sctp_ifnp); 204 } 205 } 206 return (NULL); 207} 208 209 210 211struct sctp_vrf * 212sctp_find_vrf(uint32_t vrf_id) 213{ 214 struct sctp_vrflist *bucket; 215 struct sctp_vrf *liste; 216 217 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 218 LIST_FOREACH(liste, bucket, next_vrf) { 219 if (vrf_id == liste->vrf_id) { 220 return (liste); 221 } 222 } 223 return (NULL); 224} 225 226void 227sctp_free_vrf(struct sctp_vrf *vrf) 228{ 229 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 230 if (vrf->vrf_addr_hash) { 231 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 232 vrf->vrf_addr_hash = NULL; 233 } 234 /* We zero'd the count */ 235 LIST_REMOVE(vrf, next_vrf); 236 SCTP_FREE(vrf, SCTP_M_VRF); 237 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 238 } 239} 240 241void 242sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 243{ 244 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 245 /* We zero'd the count */ 246 if (sctp_ifnp->vrf) { 247 sctp_free_vrf(sctp_ifnp->vrf); 248 } 249 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 250 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 251 } 252} 253 254void 255sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 256{ 257 struct sctp_ifn *sctp_ifnp; 258 259 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 260 if (sctp_ifnp != NULL) { 261 sctp_ifnp->ifn_mtu = mtu; 262 } 263} 264 265 266void 267sctp_free_ifa(struct sctp_ifa *sctp_ifap) 268{ 269 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 270 /* We zero'd the count */ 271 if (sctp_ifap->ifn_p) { 272 sctp_free_ifn(sctp_ifap->ifn_p); 273 } 274 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 275 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 276 } 277} 278 279static void 280sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 281{ 282 struct sctp_ifn *found; 283 284 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 285 if (found == NULL) { 286 /* Not in the list.. sorry */ 287 return; 288 } 289 if (hold_addr_lock == 0) 290 SCTP_IPI_ADDR_WLOCK(); 291 LIST_REMOVE(sctp_ifnp, next_bucket); 292 LIST_REMOVE(sctp_ifnp, next_ifn); 293 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 294 sctp_ifnp->registered_af); 295 if (hold_addr_lock == 0) 296 SCTP_IPI_ADDR_WUNLOCK(); 297 /* Take away the reference, and possibly free it */ 298 sctp_free_ifn(sctp_ifnp); 299} 300 301void 302sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 303 const char *if_name, uint32_t ifn_index) 304{ 305 struct sctp_vrf *vrf; 306 struct sctp_ifa *sctp_ifap = NULL; 307 308 SCTP_IPI_ADDR_RLOCK(); 309 vrf = sctp_find_vrf(vrf_id); 310 if (vrf == NULL) { 311 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 312 goto out; 313 314 } 315 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 316 if (sctp_ifap == NULL) { 317 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 318 goto out; 319 } 320 if (sctp_ifap->ifn_p == NULL) { 321 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 322 goto out; 323 } 324 if (if_name) { 325 int len1, len2; 326 327 len1 = strlen(if_name); 328 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 329 if (len1 != len2) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n", 331 len1, len2); 332 goto out; 333 } 334 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 335 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 336 sctp_ifap->ifn_p->ifn_name, 337 if_name); 338 goto out; 339 } 340 } else { 341 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 342 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 343 sctp_ifap->ifn_p->ifn_index, ifn_index); 344 goto out; 345 } 346 } 347 348 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 349 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 350out: 351 SCTP_IPI_ADDR_RUNLOCK(); 352} 353 354void 355sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 356 const char *if_name, uint32_t ifn_index) 357{ 358 struct sctp_vrf *vrf; 359 struct sctp_ifa *sctp_ifap = NULL; 360 361 SCTP_IPI_ADDR_RLOCK(); 362 vrf = sctp_find_vrf(vrf_id); 363 if (vrf == NULL) { 364 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 365 goto out; 366 367 } 368 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 369 if (sctp_ifap == NULL) { 370 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 371 goto out; 372 } 373 if (sctp_ifap->ifn_p == NULL) { 374 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 375 goto out; 376 } 377 if (if_name) { 378 int len1, len2; 379 380 len1 = strlen(if_name); 381 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 382 if (len1 != len2) { 383 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n", 384 len1, len2); 385 goto out; 386 } 387 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 389 sctp_ifap->ifn_p->ifn_name, 390 if_name); 391 goto out; 392 } 393 } else { 394 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 395 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 396 sctp_ifap->ifn_p->ifn_index, ifn_index); 397 goto out; 398 } 399 } 400 401 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 402 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 403out: 404 SCTP_IPI_ADDR_RUNLOCK(); 405} 406 407/*- 408 * Add an ifa to an ifn. 409 * Register the interface as necessary. 410 * NOTE: ADDR write lock MUST be held. 411 */ 412static void 413sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 414{ 415 int ifa_af; 416 417 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 418 sctp_ifap->ifn_p = sctp_ifnp; 419 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 420 /* update address counts */ 421 sctp_ifnp->ifa_count++; 422 ifa_af = sctp_ifap->address.sa.sa_family; 423 if (ifa_af == AF_INET) 424 sctp_ifnp->num_v4++; 425 else 426 sctp_ifnp->num_v6++; 427 if (sctp_ifnp->ifa_count == 1) { 428 /* register the new interface */ 429 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 430 sctp_ifnp->registered_af = ifa_af; 431 } 432} 433 434/*- 435 * Remove an ifa from its ifn. 436 * If no more addresses exist, remove the ifn too. Otherwise, re-register 437 * the interface based on the remaining address families left. 438 * NOTE: ADDR write lock MUST be held. 439 */ 440static void 441sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 442{ 443 uint32_t ifn_index; 444 445 LIST_REMOVE(sctp_ifap, next_ifa); 446 if (sctp_ifap->ifn_p) { 447 /* update address counts */ 448 sctp_ifap->ifn_p->ifa_count--; 449 if (sctp_ifap->address.sa.sa_family == AF_INET6) 450 sctp_ifap->ifn_p->num_v6--; 451 else if (sctp_ifap->address.sa.sa_family == AF_INET) 452 sctp_ifap->ifn_p->num_v4--; 453 454 ifn_index = sctp_ifap->ifn_p->ifn_index; 455 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 456 /* remove the ifn, possibly freeing it */ 457 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 458 } else { 459 /* re-register address family type, if needed */ 460 if ((sctp_ifap->ifn_p->num_v6 == 0) && 461 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 462 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6); 463 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET); 464 sctp_ifap->ifn_p->registered_af = AF_INET; 465 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 466 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 467 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET); 468 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6); 469 sctp_ifap->ifn_p->registered_af = AF_INET6; 470 } 471 /* free the ifn refcount */ 472 sctp_free_ifn(sctp_ifap->ifn_p); 473 } 474 sctp_ifap->ifn_p = NULL; 475 } 476} 477 478struct sctp_ifa * 479sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 480 uint32_t ifn_type, const char *if_name, void *ifa, 481 struct sockaddr *addr, uint32_t ifa_flags, 482 int dynamic_add) 483{ 484 struct sctp_vrf *vrf; 485 struct sctp_ifn *sctp_ifnp = NULL; 486 struct sctp_ifa *sctp_ifap = NULL; 487 struct sctp_ifalist *hash_addr_head; 488 struct sctp_ifnlist *hash_ifn_head; 489 uint32_t hash_of_addr; 490 int new_ifn_af = 0; 491 492#ifdef SCTP_DEBUG 493 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 494 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 495#endif 496 SCTP_IPI_ADDR_WLOCK(); 497 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 498 if (sctp_ifnp) { 499 vrf = sctp_ifnp->vrf; 500 } else { 501 vrf = sctp_find_vrf(vrf_id); 502 if (vrf == NULL) { 503 vrf = sctp_allocate_vrf(vrf_id); 504 if (vrf == NULL) { 505 SCTP_IPI_ADDR_WUNLOCK(); 506 return (NULL); 507 } 508 } 509 } 510 if (sctp_ifnp == NULL) { 511 /* 512 * build one and add it, can't hold lock until after malloc 513 * done though. 514 */ 515 SCTP_IPI_ADDR_WUNLOCK(); 516 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 517 sizeof(struct sctp_ifn), SCTP_M_IFN); 518 if (sctp_ifnp == NULL) { 519#ifdef INVARIANTS 520 panic("No memory for IFN:%u", sctp_ifnp->ifn_index); 521#endif 522 return (NULL); 523 } 524 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 525 sctp_ifnp->ifn_index = ifn_index; 526 sctp_ifnp->ifn_p = ifn; 527 sctp_ifnp->ifn_type = ifn_type; 528 sctp_ifnp->refcount = 0; 529 sctp_ifnp->vrf = vrf; 530 atomic_add_int(&vrf->refcount, 1); 531 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 532 if (if_name != NULL) { 533 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ); 534 } else { 535 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ)); 536 } 537 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 538 LIST_INIT(&sctp_ifnp->ifalist); 539 SCTP_IPI_ADDR_WLOCK(); 540 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 541 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 542 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 543 new_ifn_af = 1; 544 } 545 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 546 if (sctp_ifap) { 547 /* Hmm, it already exists? */ 548 if ((sctp_ifap->ifn_p) && 549 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 550 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 551 sctp_ifap->ifn_p->ifn_name, ifn_index, 552 sctp_ifap); 553 if (new_ifn_af) { 554 /* Remove the created one that we don't want */ 555 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 556 } 557 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 558 /* easy to solve, just switch back to active */ 559 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 560 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 561 sctp_ifap->ifn_p = sctp_ifnp; 562 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 563 } 564 exit_stage_left: 565 SCTP_IPI_ADDR_WUNLOCK(); 566 return (sctp_ifap); 567 } else { 568 if (sctp_ifap->ifn_p) { 569 /* 570 * The last IFN gets the address, removee 571 * the old one 572 */ 573 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 574 sctp_ifap, sctp_ifap->ifn_p->ifn_name, 575 sctp_ifap->ifn_p->ifn_index, if_name, 576 ifn_index); 577 /* remove the address from the old ifn */ 578 sctp_remove_ifa_from_ifn(sctp_ifap); 579 /* move the address over to the new ifn */ 580 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 581 goto exit_stage_left; 582 } else { 583 /* repair ifnp which was NULL ? */ 584 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 585 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 586 sctp_ifnp, sctp_ifap); 587 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 588 } 589 goto exit_stage_left; 590 } 591 } 592 SCTP_IPI_ADDR_WUNLOCK(); 593 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 594 if (sctp_ifap == NULL) { 595#ifdef INVARIANTS 596 panic("No memory for IFA"); 597#endif 598 return (NULL); 599 } 600 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 601 sctp_ifap->ifn_p = sctp_ifnp; 602 atomic_add_int(&sctp_ifnp->refcount, 1); 603 sctp_ifap->vrf_id = vrf_id; 604 sctp_ifap->ifa = ifa; 605 memcpy(&sctp_ifap->address, addr, addr->sa_len); 606 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 607 sctp_ifap->flags = ifa_flags; 608 /* Set scope */ 609 switch (sctp_ifap->address.sa.sa_family) { 610 case AF_INET: 611 { 612 struct sockaddr_in *sin; 613 614 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 615 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 616 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 617 sctp_ifap->src_is_loop = 1; 618 } 619 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 620 sctp_ifap->src_is_priv = 1; 621 } 622 sctp_ifnp->num_v4++; 623 if (new_ifn_af) 624 new_ifn_af = AF_INET; 625 break; 626 } 627#ifdef INET6 628 case AF_INET6: 629 { 630 /* ok to use deprecated addresses? */ 631 struct sockaddr_in6 *sin6; 632 633 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 634 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 635 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 636 sctp_ifap->src_is_loop = 1; 637 } 638 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 639 sctp_ifap->src_is_priv = 1; 640 } 641 sctp_ifnp->num_v6++; 642 if (new_ifn_af) 643 new_ifn_af = AF_INET6; 644 break; 645 } 646#endif 647 default: 648 new_ifn_af = 0; 649 break; 650 } 651 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 652 653 if ((sctp_ifap->src_is_priv == 0) && 654 (sctp_ifap->src_is_loop == 0)) { 655 sctp_ifap->src_is_glob = 1; 656 } 657 SCTP_IPI_ADDR_WLOCK(); 658 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 659 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 660 sctp_ifap->refcount = 1; 661 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 662 sctp_ifnp->ifa_count++; 663 vrf->total_ifa_count++; 664 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 665 if (new_ifn_af) { 666 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 667 sctp_ifnp->registered_af = new_ifn_af; 668 } 669 SCTP_IPI_ADDR_WUNLOCK(); 670 if (dynamic_add) { 671 /* 672 * Bump up the refcount so that when the timer completes it 673 * will drop back down. 674 */ 675 struct sctp_laddr *wi; 676 677 atomic_add_int(&sctp_ifap->refcount, 1); 678 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 679 if (wi == NULL) { 680 /* 681 * Gak, what can we do? We have lost an address 682 * change can you say HOSED? 683 */ 684 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 685 /* Opps, must decrement the count */ 686 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 687 if_name); 688 return (NULL); 689 } 690 SCTP_INCR_LADDR_COUNT(); 691 bzero(wi, sizeof(*wi)); 692 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 693 wi->ifa = sctp_ifap; 694 wi->action = SCTP_ADD_IP_ADDRESS; 695 696 SCTP_WQ_ADDR_LOCK(); 697 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 698 SCTP_WQ_ADDR_UNLOCK(); 699 700 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 701 (struct sctp_inpcb *)NULL, 702 (struct sctp_tcb *)NULL, 703 (struct sctp_nets *)NULL); 704 } else { 705 /* it's ready for use */ 706 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 707 } 708 return (sctp_ifap); 709} 710 711void 712sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 713 uint32_t ifn_index, const char *if_name) 714{ 715 struct sctp_vrf *vrf; 716 struct sctp_ifa *sctp_ifap = NULL; 717 718 SCTP_IPI_ADDR_WLOCK(); 719 vrf = sctp_find_vrf(vrf_id); 720 if (vrf == NULL) { 721 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 722 goto out_now; 723 } 724#ifdef SCTP_DEBUG 725 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 726 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 727#endif 728 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 729 if (sctp_ifap) { 730 /* Validate the delete */ 731 if (sctp_ifap->ifn_p) { 732 int valid = 0; 733 734 /*- 735 * The name has priority over the ifn_index 736 * if its given. We do this especially for 737 * panda who might recycle indexes fast. 738 */ 739 if (if_name) { 740 int len1, len2; 741 742 len1 = min(SCTP_IFNAMSIZ, strlen(if_name)); 743 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name)); 744 if (len1 && len2 && (len1 == len2)) { 745 /* we can compare them */ 746 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) { 747 /* 748 * They match its a correct 749 * delete 750 */ 751 valid = 1; 752 } 753 } 754 } 755 if (!valid) { 756 /* last ditch check ifn_index */ 757 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 758 valid = 1; 759 } 760 } 761 if (!valid) { 762 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 763 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 764 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 765 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 766 SCTP_IPI_ADDR_WUNLOCK(); 767 return; 768 } 769 } 770 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap); 771 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 772 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 773 vrf->total_ifa_count--; 774 LIST_REMOVE(sctp_ifap, next_bucket); 775 sctp_remove_ifa_from_ifn(sctp_ifap); 776 } 777#ifdef SCTP_DEBUG 778 else { 779 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 780 ifn_index); 781 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 782 } 783#endif 784 785out_now: 786 SCTP_IPI_ADDR_WUNLOCK(); 787 if (sctp_ifap) { 788 struct sctp_laddr *wi; 789 790 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 791 if (wi == NULL) { 792 /* 793 * Gak, what can we do? We have lost an address 794 * change can you say HOSED? 795 */ 796 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 797 798 /* Oops, must decrement the count */ 799 sctp_free_ifa(sctp_ifap); 800 return; 801 } 802 SCTP_INCR_LADDR_COUNT(); 803 bzero(wi, sizeof(*wi)); 804 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 805 wi->ifa = sctp_ifap; 806 wi->action = SCTP_DEL_IP_ADDRESS; 807 SCTP_WQ_ADDR_LOCK(); 808 /* 809 * Should this really be a tailq? As it is we will process 810 * the newest first :-0 811 */ 812 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 813 SCTP_WQ_ADDR_UNLOCK(); 814 815 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 816 (struct sctp_inpcb *)NULL, 817 (struct sctp_tcb *)NULL, 818 (struct sctp_nets *)NULL); 819 } 820 return; 821} 822 823 824static struct sctp_tcb * 825sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 826 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 827{ 828 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 829 /* 830 * If we support the TCP model, then we must now dig through to see 831 * if we can find our endpoint in the list of tcp ep's. 832 */ 833 uint16_t lport, rport; 834 struct sctppcbhead *ephead; 835 struct sctp_inpcb *inp; 836 struct sctp_laddr *laddr; 837 struct sctp_tcb *stcb; 838 struct sctp_nets *net; 839 840 if ((to == NULL) || (from == NULL)) { 841 return (NULL); 842 } 843 if (to->sa_family == AF_INET && from->sa_family == AF_INET) { 844 lport = ((struct sockaddr_in *)to)->sin_port; 845 rport = ((struct sockaddr_in *)from)->sin_port; 846 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) { 847 lport = ((struct sockaddr_in6 *)to)->sin6_port; 848 rport = ((struct sockaddr_in6 *)from)->sin6_port; 849 } else { 850 return NULL; 851 } 852 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), SCTP_BASE_INFO(hashtcpmark))]; 853 /* 854 * Ok now for each of the guys in this bucket we must look and see: 855 * - Does the remote port match. - Does there single association's 856 * addresses match this address (to). If so we update p_ep to point 857 * to this ep and return the tcb from it. 858 */ 859 LIST_FOREACH(inp, ephead, sctp_hash) { 860 SCTP_INP_RLOCK(inp); 861 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 862 SCTP_INP_RUNLOCK(inp); 863 continue; 864 } 865 if (lport != inp->sctp_lport) { 866 SCTP_INP_RUNLOCK(inp); 867 continue; 868 } 869 if (inp->def_vrf_id != vrf_id) { 870 SCTP_INP_RUNLOCK(inp); 871 continue; 872 } 873 /* check to see if the ep has one of the addresses */ 874 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 875 /* We are NOT bound all, so look further */ 876 int match = 0; 877 878 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 879 880 if (laddr->ifa == NULL) { 881 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 882 continue; 883 } 884 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 885 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 886 continue; 887 } 888 if (laddr->ifa->address.sa.sa_family == 889 to->sa_family) { 890 /* see if it matches */ 891 struct sockaddr_in *intf_addr, *sin; 892 893 intf_addr = &laddr->ifa->address.sin; 894 sin = (struct sockaddr_in *)to; 895 if (from->sa_family == AF_INET) { 896 if (sin->sin_addr.s_addr == 897 intf_addr->sin_addr.s_addr) { 898 match = 1; 899 break; 900 } 901 } 902#ifdef INET6 903 if (from->sa_family == AF_INET6) { 904 struct sockaddr_in6 *intf_addr6; 905 struct sockaddr_in6 *sin6; 906 907 sin6 = (struct sockaddr_in6 *) 908 to; 909 intf_addr6 = &laddr->ifa->address.sin6; 910 911 if (SCTP6_ARE_ADDR_EQUAL(sin6, 912 intf_addr6)) { 913 match = 1; 914 break; 915 } 916 } 917#endif 918 } 919 } 920 if (match == 0) { 921 /* This endpoint does not have this address */ 922 SCTP_INP_RUNLOCK(inp); 923 continue; 924 } 925 } 926 /* 927 * Ok if we hit here the ep has the address, does it hold 928 * the tcb? 929 */ 930 931 stcb = LIST_FIRST(&inp->sctp_asoc_list); 932 if (stcb == NULL) { 933 SCTP_INP_RUNLOCK(inp); 934 continue; 935 } 936 SCTP_TCB_LOCK(stcb); 937 if (stcb->rport != rport) { 938 /* remote port does not match. */ 939 SCTP_TCB_UNLOCK(stcb); 940 SCTP_INP_RUNLOCK(inp); 941 continue; 942 } 943 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 944 SCTP_TCB_UNLOCK(stcb); 945 SCTP_INP_RUNLOCK(inp); 946 continue; 947 } 948 /* Does this TCB have a matching address? */ 949 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 950 951 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 952 /* not the same family, can't be a match */ 953 continue; 954 } 955 switch (from->sa_family) { 956 case AF_INET: 957 { 958 struct sockaddr_in *sin, *rsin; 959 960 sin = (struct sockaddr_in *)&net->ro._l_addr; 961 rsin = (struct sockaddr_in *)from; 962 if (sin->sin_addr.s_addr == 963 rsin->sin_addr.s_addr) { 964 /* found it */ 965 if (netp != NULL) { 966 *netp = net; 967 } 968 /* 969 * Update the endpoint 970 * pointer 971 */ 972 *inp_p = inp; 973 SCTP_INP_RUNLOCK(inp); 974 return (stcb); 975 } 976 break; 977 } 978#ifdef INET6 979 case AF_INET6: 980 { 981 struct sockaddr_in6 *sin6, *rsin6; 982 983 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 984 rsin6 = (struct sockaddr_in6 *)from; 985 if (SCTP6_ARE_ADDR_EQUAL(sin6, 986 rsin6)) { 987 /* found it */ 988 if (netp != NULL) { 989 *netp = net; 990 } 991 /* 992 * Update the endpoint 993 * pointer 994 */ 995 *inp_p = inp; 996 SCTP_INP_RUNLOCK(inp); 997 return (stcb); 998 } 999 break; 1000 } 1001#endif 1002 default: 1003 /* TSNH */ 1004 break; 1005 } 1006 } 1007 SCTP_TCB_UNLOCK(stcb); 1008 SCTP_INP_RUNLOCK(inp); 1009 } 1010 return (NULL); 1011} 1012 1013/* 1014 * rules for use 1015 * 1016 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1017 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1018 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1019 * NULL. 1020 */ 1021 1022struct sctp_tcb * 1023sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1024 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1025{ 1026 struct sctpasochead *head; 1027 struct sctp_inpcb *inp; 1028 struct sctp_tcb *stcb = NULL; 1029 struct sctp_nets *net; 1030 uint16_t rport; 1031 1032 inp = *inp_p; 1033 if (remote->sa_family == AF_INET) { 1034 rport = (((struct sockaddr_in *)remote)->sin_port); 1035 } else if (remote->sa_family == AF_INET6) { 1036 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1037 } else { 1038 return (NULL); 1039 } 1040 if (locked_tcb) { 1041 /* 1042 * UN-lock so we can do proper locking here this occurs when 1043 * called from load_addresses_from_init. 1044 */ 1045 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1046 SCTP_TCB_UNLOCK(locked_tcb); 1047 } 1048 SCTP_INP_INFO_RLOCK(); 1049 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1050 /*- 1051 * Now either this guy is our listener or it's the 1052 * connector. If it is the one that issued the connect, then 1053 * it's only chance is to be the first TCB in the list. If 1054 * it is the acceptor, then do the special_lookup to hash 1055 * and find the real inp. 1056 */ 1057 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1058 /* to is peer addr, from is my addr */ 1059 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1060 netp, inp->def_vrf_id); 1061 if ((stcb != NULL) && (locked_tcb == NULL)) { 1062 /* we have a locked tcb, lower refcount */ 1063 SCTP_INP_DECR_REF(inp); 1064 } 1065 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1066 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1067 SCTP_TCB_LOCK(locked_tcb); 1068 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1069 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1070 } 1071 SCTP_INP_INFO_RUNLOCK(); 1072 return (stcb); 1073 } else { 1074 SCTP_INP_WLOCK(inp); 1075 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1076 goto null_return; 1077 } 1078 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1079 if (stcb == NULL) { 1080 goto null_return; 1081 } 1082 SCTP_TCB_LOCK(stcb); 1083 1084 if (stcb->rport != rport) { 1085 /* remote port does not match. */ 1086 SCTP_TCB_UNLOCK(stcb); 1087 goto null_return; 1088 } 1089 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1090 SCTP_TCB_UNLOCK(stcb); 1091 goto null_return; 1092 } 1093 /* now look at the list of remote addresses */ 1094 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1095#ifdef INVARIANTS 1096 if (net == (TAILQ_NEXT(net, sctp_next))) { 1097 panic("Corrupt net list"); 1098 } 1099#endif 1100 if (net->ro._l_addr.sa.sa_family != 1101 remote->sa_family) { 1102 /* not the same family */ 1103 continue; 1104 } 1105 switch (remote->sa_family) { 1106 case AF_INET: 1107 { 1108 struct sockaddr_in *sin, 1109 *rsin; 1110 1111 sin = (struct sockaddr_in *) 1112 &net->ro._l_addr; 1113 rsin = (struct sockaddr_in *)remote; 1114 if (sin->sin_addr.s_addr == 1115 rsin->sin_addr.s_addr) { 1116 /* found it */ 1117 if (netp != NULL) { 1118 *netp = net; 1119 } 1120 if (locked_tcb == NULL) { 1121 SCTP_INP_DECR_REF(inp); 1122 } else if (locked_tcb != stcb) { 1123 SCTP_TCB_LOCK(locked_tcb); 1124 } 1125 if (locked_tcb) { 1126 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1127 } 1128 SCTP_INP_WUNLOCK(inp); 1129 SCTP_INP_INFO_RUNLOCK(); 1130 return (stcb); 1131 } 1132 break; 1133 } 1134#ifdef INET6 1135 case AF_INET6: 1136 { 1137 struct sockaddr_in6 *sin6, 1138 *rsin6; 1139 1140 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1141 rsin6 = (struct sockaddr_in6 *)remote; 1142 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1143 rsin6)) { 1144 /* found it */ 1145 if (netp != NULL) { 1146 *netp = net; 1147 } 1148 if (locked_tcb == NULL) { 1149 SCTP_INP_DECR_REF(inp); 1150 } else if (locked_tcb != stcb) { 1151 SCTP_TCB_LOCK(locked_tcb); 1152 } 1153 if (locked_tcb) { 1154 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1155 } 1156 SCTP_INP_WUNLOCK(inp); 1157 SCTP_INP_INFO_RUNLOCK(); 1158 return (stcb); 1159 } 1160 break; 1161 } 1162#endif 1163 default: 1164 /* TSNH */ 1165 break; 1166 } 1167 } 1168 SCTP_TCB_UNLOCK(stcb); 1169 } 1170 } else { 1171 SCTP_INP_WLOCK(inp); 1172 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1173 goto null_return; 1174 } 1175 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1176 inp->sctp_hashmark)]; 1177 if (head == NULL) { 1178 goto null_return; 1179 } 1180 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1181 if (stcb->rport != rport) { 1182 /* remote port does not match */ 1183 continue; 1184 } 1185 SCTP_TCB_LOCK(stcb); 1186 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1187 SCTP_TCB_UNLOCK(stcb); 1188 continue; 1189 } 1190 /* now look at the list of remote addresses */ 1191 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1192#ifdef INVARIANTS 1193 if (net == (TAILQ_NEXT(net, sctp_next))) { 1194 panic("Corrupt net list"); 1195 } 1196#endif 1197 if (net->ro._l_addr.sa.sa_family != 1198 remote->sa_family) { 1199 /* not the same family */ 1200 continue; 1201 } 1202 switch (remote->sa_family) { 1203 case AF_INET: 1204 { 1205 struct sockaddr_in *sin, 1206 *rsin; 1207 1208 sin = (struct sockaddr_in *) 1209 &net->ro._l_addr; 1210 rsin = (struct sockaddr_in *)remote; 1211 if (sin->sin_addr.s_addr == 1212 rsin->sin_addr.s_addr) { 1213 /* found it */ 1214 if (netp != NULL) { 1215 *netp = net; 1216 } 1217 if (locked_tcb == NULL) { 1218 SCTP_INP_DECR_REF(inp); 1219 } else if (locked_tcb != stcb) { 1220 SCTP_TCB_LOCK(locked_tcb); 1221 } 1222 if (locked_tcb) { 1223 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1224 } 1225 SCTP_INP_WUNLOCK(inp); 1226 SCTP_INP_INFO_RUNLOCK(); 1227 return (stcb); 1228 } 1229 break; 1230 } 1231#ifdef INET6 1232 case AF_INET6: 1233 { 1234 struct sockaddr_in6 *sin6, 1235 *rsin6; 1236 1237 sin6 = (struct sockaddr_in6 *) 1238 &net->ro._l_addr; 1239 rsin6 = (struct sockaddr_in6 *)remote; 1240 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1241 rsin6)) { 1242 /* found it */ 1243 if (netp != NULL) { 1244 *netp = net; 1245 } 1246 if (locked_tcb == NULL) { 1247 SCTP_INP_DECR_REF(inp); 1248 } else if (locked_tcb != stcb) { 1249 SCTP_TCB_LOCK(locked_tcb); 1250 } 1251 if (locked_tcb) { 1252 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1253 } 1254 SCTP_INP_WUNLOCK(inp); 1255 SCTP_INP_INFO_RUNLOCK(); 1256 return (stcb); 1257 } 1258 break; 1259 } 1260#endif 1261 default: 1262 /* TSNH */ 1263 break; 1264 } 1265 } 1266 SCTP_TCB_UNLOCK(stcb); 1267 } 1268 } 1269null_return: 1270 /* clean up for returning null */ 1271 if (locked_tcb) { 1272 SCTP_TCB_LOCK(locked_tcb); 1273 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1274 } 1275 SCTP_INP_WUNLOCK(inp); 1276 SCTP_INP_INFO_RUNLOCK(); 1277 /* not found */ 1278 return (NULL); 1279} 1280 1281/* 1282 * Find an association for a specific endpoint using the association id given 1283 * out in the COMM_UP notification 1284 */ 1285 1286struct sctp_tcb * 1287sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1288{ 1289 /* 1290 * Use my the assoc_id to find a endpoint 1291 */ 1292 struct sctpasochead *head; 1293 struct sctp_tcb *stcb; 1294 uint32_t id; 1295 1296 if (inp == NULL) { 1297 SCTP_PRINTF("TSNH ep_associd\n"); 1298 return (NULL); 1299 } 1300 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1301 SCTP_PRINTF("TSNH ep_associd0\n"); 1302 return (NULL); 1303 } 1304 id = (uint32_t) asoc_id; 1305 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1306 if (head == NULL) { 1307 /* invalid id TSNH */ 1308 SCTP_PRINTF("TSNH ep_associd1\n"); 1309 return (NULL); 1310 } 1311 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1312 if (stcb->asoc.assoc_id == id) { 1313 if (inp != stcb->sctp_ep) { 1314 /* 1315 * some other guy has the same id active (id 1316 * collision ??). 1317 */ 1318 SCTP_PRINTF("TSNH ep_associd2\n"); 1319 continue; 1320 } 1321 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1322 continue; 1323 } 1324 if (want_lock) { 1325 SCTP_TCB_LOCK(stcb); 1326 } 1327 return (stcb); 1328 } 1329 } 1330 return (NULL); 1331} 1332 1333 1334struct sctp_tcb * 1335sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1336{ 1337 struct sctp_tcb *stcb; 1338 1339 SCTP_INP_RLOCK(inp); 1340 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1341 SCTP_INP_RUNLOCK(inp); 1342 return (stcb); 1343} 1344 1345 1346static struct sctp_inpcb * 1347sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1348 uint16_t lport, uint32_t vrf_id) 1349{ 1350 struct sctp_inpcb *inp; 1351 struct sockaddr_in *sin; 1352 1353#ifdef INET6 1354 struct sockaddr_in6 *sin6; 1355 1356#endif 1357 struct sctp_laddr *laddr; 1358 1359#ifdef INET6 1360 struct sockaddr_in6 *intf_addr6; 1361 1362#endif 1363 1364 int fnd; 1365 1366 /* 1367 * Endpoing probe expects that the INP_INFO is locked. 1368 */ 1369 sin = NULL; 1370#ifdef INET6 1371 sin6 = NULL; 1372#endif 1373 switch (nam->sa_family) { 1374 case AF_INET: 1375 sin = (struct sockaddr_in *)nam; 1376 break; 1377#ifdef INET6 1378 case AF_INET6: 1379 sin6 = (struct sockaddr_in6 *)nam; 1380 break; 1381#endif 1382 default: 1383 /* unsupported family */ 1384 return (NULL); 1385 } 1386 1387 if (head == NULL) 1388 return (NULL); 1389 1390 LIST_FOREACH(inp, head, sctp_hash) { 1391 SCTP_INP_RLOCK(inp); 1392 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1393 SCTP_INP_RUNLOCK(inp); 1394 continue; 1395 } 1396 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1397 (inp->sctp_lport == lport)) { 1398 /* got it */ 1399 if ((nam->sa_family == AF_INET) && 1400 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1401 SCTP_IPV6_V6ONLY(inp)) { 1402 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1403 SCTP_INP_RUNLOCK(inp); 1404 continue; 1405 } 1406 /* A V6 address and the endpoint is NOT bound V6 */ 1407 if (nam->sa_family == AF_INET6 && 1408 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1409 SCTP_INP_RUNLOCK(inp); 1410 continue; 1411 } 1412 /* does a VRF id match? */ 1413 fnd = 0; 1414 if (inp->def_vrf_id == vrf_id) 1415 fnd = 1; 1416 1417 SCTP_INP_RUNLOCK(inp); 1418 if (!fnd) 1419 continue; 1420 return (inp); 1421 } 1422 SCTP_INP_RUNLOCK(inp); 1423 } 1424 if ((nam->sa_family == AF_INET) && 1425 (sin->sin_addr.s_addr == INADDR_ANY)) { 1426 /* Can't hunt for one that has no address specified */ 1427 return (NULL); 1428 } 1429#ifdef INET6 1430 if ((nam->sa_family == AF_INET6) && 1431 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 1432 /* Can't hunt for one that has no address specified */ 1433 return (NULL); 1434 } 1435#endif 1436 /* 1437 * ok, not bound to all so see if we can find a EP bound to this 1438 * address. 1439 */ 1440 LIST_FOREACH(inp, head, sctp_hash) { 1441 SCTP_INP_RLOCK(inp); 1442 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1443 SCTP_INP_RUNLOCK(inp); 1444 continue; 1445 } 1446 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1447 SCTP_INP_RUNLOCK(inp); 1448 continue; 1449 } 1450 /* 1451 * Ok this could be a likely candidate, look at all of its 1452 * addresses 1453 */ 1454 if (inp->sctp_lport != lport) { 1455 SCTP_INP_RUNLOCK(inp); 1456 continue; 1457 } 1458 /* does a VRF id match? */ 1459 fnd = 0; 1460 if (inp->def_vrf_id == vrf_id) 1461 fnd = 1; 1462 1463 if (!fnd) { 1464 SCTP_INP_RUNLOCK(inp); 1465 continue; 1466 } 1467 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1468 if (laddr->ifa == NULL) { 1469 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1470 __FUNCTION__); 1471 continue; 1472 } 1473 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1474 laddr->ifa); 1475 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1476 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1477 continue; 1478 } 1479 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1480 /* possible, see if it matches */ 1481 struct sockaddr_in *intf_addr; 1482 1483 intf_addr = &laddr->ifa->address.sin; 1484 switch (nam->sa_family) { 1485 case AF_INET: 1486 if (sin->sin_addr.s_addr == 1487 intf_addr->sin_addr.s_addr) { 1488 SCTP_INP_RUNLOCK(inp); 1489 return (inp); 1490 } 1491 break; 1492#ifdef INET6 1493 case AF_INET6: 1494 intf_addr6 = &laddr->ifa->address.sin6; 1495 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1496 intf_addr6)) { 1497 SCTP_INP_RUNLOCK(inp); 1498 return (inp); 1499 } 1500 break; 1501#endif 1502 } 1503 } 1504 } 1505 SCTP_INP_RUNLOCK(inp); 1506 } 1507 return (NULL); 1508} 1509 1510 1511static struct sctp_inpcb * 1512sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1513{ 1514 struct sctppcbhead *head; 1515 struct sctp_inpcb *t_inp; 1516 int fnd; 1517 1518 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1519 SCTP_BASE_INFO(hashmark))]; 1520 LIST_FOREACH(t_inp, head, sctp_hash) { 1521 if (t_inp->sctp_lport != lport) { 1522 continue; 1523 } 1524 /* is it in the VRF in question */ 1525 fnd = 0; 1526 if (t_inp->def_vrf_id == vrf_id) 1527 fnd = 1; 1528 if (!fnd) 1529 continue; 1530 1531 /* This one is in use. */ 1532 /* check the v6/v4 binding issue */ 1533 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1534 SCTP_IPV6_V6ONLY(t_inp)) { 1535 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1536 /* collision in V6 space */ 1537 return (t_inp); 1538 } else { 1539 /* inp is BOUND_V4 no conflict */ 1540 continue; 1541 } 1542 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1543 /* t_inp is bound v4 and v6, conflict always */ 1544 return (t_inp); 1545 } else { 1546 /* t_inp is bound only V4 */ 1547 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1548 SCTP_IPV6_V6ONLY(inp)) { 1549 /* no conflict */ 1550 continue; 1551 } 1552 /* else fall through to conflict */ 1553 } 1554 return (t_inp); 1555 } 1556 return (NULL); 1557} 1558 1559 1560int 1561sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1562{ 1563 /* For 1-2-1 with port reuse */ 1564 struct sctppcbhead *head; 1565 struct sctp_inpcb *tinp; 1566 1567 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1568 /* only works with port reuse on */ 1569 return (-1); 1570 } 1571 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1572 return (0); 1573 } 1574 SCTP_INP_RUNLOCK(inp); 1575 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1576 SCTP_BASE_INFO(hashmark))]; 1577 /* Kick out all non-listeners to the TCP hash */ 1578 LIST_FOREACH(tinp, head, sctp_hash) { 1579 if (tinp->sctp_lport != inp->sctp_lport) { 1580 continue; 1581 } 1582 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1583 continue; 1584 } 1585 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1586 continue; 1587 } 1588 if (tinp->sctp_socket->so_qlimit) { 1589 continue; 1590 } 1591 SCTP_INP_WLOCK(tinp); 1592 LIST_REMOVE(tinp, sctp_hash); 1593 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1594 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1595 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1596 SCTP_INP_WUNLOCK(tinp); 1597 } 1598 SCTP_INP_WLOCK(inp); 1599 /* Pull from where he was */ 1600 LIST_REMOVE(inp, sctp_hash); 1601 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1602 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1603 LIST_INSERT_HEAD(head, inp, sctp_hash); 1604 SCTP_INP_WUNLOCK(inp); 1605 SCTP_INP_RLOCK(inp); 1606 return (0); 1607} 1608 1609 1610struct sctp_inpcb * 1611sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1612 uint32_t vrf_id) 1613{ 1614 /* 1615 * First we check the hash table to see if someone has this port 1616 * bound with just the port. 1617 */ 1618 struct sctp_inpcb *inp; 1619 struct sctppcbhead *head; 1620 struct sockaddr_in *sin; 1621 struct sockaddr_in6 *sin6; 1622 int lport; 1623 1624 if (nam->sa_family == AF_INET) { 1625 sin = (struct sockaddr_in *)nam; 1626 lport = ((struct sockaddr_in *)nam)->sin_port; 1627 } else if (nam->sa_family == AF_INET6) { 1628 sin6 = (struct sockaddr_in6 *)nam; 1629 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1630 } else { 1631 /* unsupported family */ 1632 return (NULL); 1633 } 1634 /* 1635 * I could cheat here and just cast to one of the types but we will 1636 * do it right. It also provides the check against an Unsupported 1637 * type too. 1638 */ 1639 /* Find the head of the ALLADDR chain */ 1640 if (have_lock == 0) { 1641 SCTP_INP_INFO_RLOCK(); 1642 } 1643 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1644 SCTP_BASE_INFO(hashmark))]; 1645 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1646 1647 /* 1648 * If the TCP model exists it could be that the main listening 1649 * endpoint is gone but there exists a connected socket for this guy 1650 * yet. If so we can return the first one that we find. This may NOT 1651 * be the correct one so the caller should be wary on the return 1652 * INP. Currently the onlyc caller that sets this flag is in bindx 1653 * where we are verifying that a user CAN bind the address. He 1654 * either has bound it already, or someone else has, or its open to 1655 * bind, so this is good enough. 1656 */ 1657 if (inp == NULL && find_tcp_pool) { 1658 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 1659 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1660 } 1661 if (inp) { 1662 SCTP_INP_INCR_REF(inp); 1663 } 1664 if (have_lock == 0) { 1665 SCTP_INP_INFO_RUNLOCK(); 1666 } 1667 return (inp); 1668} 1669 1670/* 1671 * Find an association for an endpoint with the pointer to whom you want to 1672 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1673 * need to change the *to to some other struct like a mbuf... 1674 */ 1675struct sctp_tcb * 1676sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1677 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1678 uint32_t vrf_id) 1679{ 1680 struct sctp_inpcb *inp = NULL; 1681 struct sctp_tcb *retval; 1682 1683 SCTP_INP_INFO_RLOCK(); 1684 if (find_tcp_pool) { 1685 if (inp_p != NULL) { 1686 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1687 vrf_id); 1688 } else { 1689 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1690 vrf_id); 1691 } 1692 if (retval != NULL) { 1693 SCTP_INP_INFO_RUNLOCK(); 1694 return (retval); 1695 } 1696 } 1697 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1698 if (inp_p != NULL) { 1699 *inp_p = inp; 1700 } 1701 SCTP_INP_INFO_RUNLOCK(); 1702 1703 if (inp == NULL) { 1704 return (NULL); 1705 } 1706 /* 1707 * ok, we have an endpoint, now lets find the assoc for it (if any) 1708 * we now place the source address or from in the to of the find 1709 * endpoint call. Since in reality this chain is used from the 1710 * inbound packet side. 1711 */ 1712 if (inp_p != NULL) { 1713 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1714 NULL); 1715 } else { 1716 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1717 NULL); 1718 } 1719 return retval; 1720} 1721 1722 1723/* 1724 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1725 * find all addresses that the sender has specified in any address list. Each 1726 * address will be used to lookup the TCB and see if one exits. 1727 */ 1728static struct sctp_tcb * 1729sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1730 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1731 struct sockaddr *dest) 1732{ 1733 struct sockaddr_in sin4; 1734 struct sockaddr_in6 sin6; 1735 struct sctp_paramhdr *phdr, parm_buf; 1736 struct sctp_tcb *retval; 1737 uint32_t ptype, plen; 1738 1739 memset(&sin4, 0, sizeof(sin4)); 1740 memset(&sin6, 0, sizeof(sin6)); 1741 sin4.sin_len = sizeof(sin4); 1742 sin4.sin_family = AF_INET; 1743 sin4.sin_port = sh->src_port; 1744 sin6.sin6_len = sizeof(sin6); 1745 sin6.sin6_family = AF_INET6; 1746 sin6.sin6_port = sh->src_port; 1747 1748 retval = NULL; 1749 offset += sizeof(struct sctp_init_chunk); 1750 1751 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1752 while (phdr != NULL) { 1753 /* now we must see if we want the parameter */ 1754 ptype = ntohs(phdr->param_type); 1755 plen = ntohs(phdr->param_length); 1756 if (plen == 0) { 1757 break; 1758 } 1759 if (ptype == SCTP_IPV4_ADDRESS && 1760 plen == sizeof(struct sctp_ipv4addr_param)) { 1761 /* Get the rest of the address */ 1762 struct sctp_ipv4addr_param ip4_parm, *p4; 1763 1764 phdr = sctp_get_next_param(m, offset, 1765 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1766 if (phdr == NULL) { 1767 return (NULL); 1768 } 1769 p4 = (struct sctp_ipv4addr_param *)phdr; 1770 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 1771 /* look it up */ 1772 retval = sctp_findassociation_ep_addr(inp_p, 1773 (struct sockaddr *)&sin4, netp, dest, NULL); 1774 if (retval != NULL) { 1775 return (retval); 1776 } 1777 } else if (ptype == SCTP_IPV6_ADDRESS && 1778 plen == sizeof(struct sctp_ipv6addr_param)) { 1779 /* Get the rest of the address */ 1780 struct sctp_ipv6addr_param ip6_parm, *p6; 1781 1782 phdr = sctp_get_next_param(m, offset, 1783 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 1784 if (phdr == NULL) { 1785 return (NULL); 1786 } 1787 p6 = (struct sctp_ipv6addr_param *)phdr; 1788 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 1789 /* look it up */ 1790 retval = sctp_findassociation_ep_addr(inp_p, 1791 (struct sockaddr *)&sin6, netp, dest, NULL); 1792 if (retval != NULL) { 1793 return (retval); 1794 } 1795 } 1796 offset += SCTP_SIZE32(plen); 1797 phdr = sctp_get_next_param(m, offset, &parm_buf, 1798 sizeof(parm_buf)); 1799 } 1800 return (NULL); 1801} 1802 1803static int 1804sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1805{ 1806 struct sctp_nets *net; 1807 1808 /* 1809 * Simple question, the ports match, does the tcb own the to 1810 * address? 1811 */ 1812 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1813 /* of course */ 1814 return (1); 1815 } 1816 /* have to look at all bound addresses */ 1817 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1818 if (net->ro._l_addr.sa.sa_family != to->sa_family) { 1819 /* not the same family, can't be a match */ 1820 continue; 1821 } 1822 switch (to->sa_family) { 1823 case AF_INET: 1824 { 1825 struct sockaddr_in *sin, *rsin; 1826 1827 sin = (struct sockaddr_in *)&net->ro._l_addr; 1828 rsin = (struct sockaddr_in *)to; 1829 if (sin->sin_addr.s_addr == 1830 rsin->sin_addr.s_addr) { 1831 /* found it */ 1832 return (1); 1833 } 1834 break; 1835 } 1836#ifdef INET6 1837 case AF_INET6: 1838 { 1839 struct sockaddr_in6 *sin6, *rsin6; 1840 1841 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1842 rsin6 = (struct sockaddr_in6 *)to; 1843 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1844 rsin6)) { 1845 /* Update the endpoint pointer */ 1846 return (1); 1847 } 1848 break; 1849 } 1850#endif 1851 default: 1852 /* TSNH */ 1853 break; 1854 } 1855 } 1856 /* Nope, do not have the address ;-( */ 1857 return (0); 1858} 1859 1860static struct sctp_tcb * 1861sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 1862 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 1863 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 1864{ 1865 /* 1866 * Use my vtag to hash. If we find it we then verify the source addr 1867 * is in the assoc. If all goes well we save a bit on rec of a 1868 * packet. 1869 */ 1870 struct sctpasochead *head; 1871 struct sctp_nets *net; 1872 struct sctp_tcb *stcb; 1873 1874 *netp = NULL; 1875 *inp_p = NULL; 1876 SCTP_INP_INFO_RLOCK(); 1877 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 1878 SCTP_BASE_INFO(hashasocmark))]; 1879 if (head == NULL) { 1880 /* invalid vtag */ 1881 SCTP_INP_INFO_RUNLOCK(); 1882 return (NULL); 1883 } 1884 LIST_FOREACH(stcb, head, sctp_asocs) { 1885 SCTP_INP_RLOCK(stcb->sctp_ep); 1886 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1887 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1888 continue; 1889 } 1890 SCTP_TCB_LOCK(stcb); 1891 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1892 if (stcb->asoc.my_vtag == vtag) { 1893 /* candidate */ 1894 if (stcb->rport != rport) { 1895 SCTP_TCB_UNLOCK(stcb); 1896 continue; 1897 } 1898 if (stcb->sctp_ep->sctp_lport != lport) { 1899 SCTP_TCB_UNLOCK(stcb); 1900 continue; 1901 } 1902 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1903 SCTP_TCB_UNLOCK(stcb); 1904 continue; 1905 } 1906 /* RRS:Need toaddr check here */ 1907 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 1908 /* Endpoint does not own this address */ 1909 SCTP_TCB_UNLOCK(stcb); 1910 continue; 1911 } 1912 if (remote_tag) { 1913 /* 1914 * If we have both vtags thats all we match 1915 * on 1916 */ 1917 if (stcb->asoc.peer_vtag == remote_tag) { 1918 /* 1919 * If both tags match we consider it 1920 * conclusive and check NO 1921 * source/destination addresses 1922 */ 1923 goto conclusive; 1924 } 1925 } 1926 if (skip_src_check) { 1927 conclusive: 1928 if (from) { 1929 net = sctp_findnet(stcb, from); 1930 } else { 1931 *netp = NULL; /* unknown */ 1932 } 1933 if (inp_p) 1934 *inp_p = stcb->sctp_ep; 1935 SCTP_INP_INFO_RUNLOCK(); 1936 return (stcb); 1937 } 1938 net = sctp_findnet(stcb, from); 1939 if (net) { 1940 /* yep its him. */ 1941 *netp = net; 1942 SCTP_STAT_INCR(sctps_vtagexpress); 1943 *inp_p = stcb->sctp_ep; 1944 SCTP_INP_INFO_RUNLOCK(); 1945 return (stcb); 1946 } else { 1947 /* 1948 * not him, this should only happen in rare 1949 * cases so I peg it. 1950 */ 1951 SCTP_STAT_INCR(sctps_vtagbogus); 1952 } 1953 } 1954 SCTP_TCB_UNLOCK(stcb); 1955 } 1956 SCTP_INP_INFO_RUNLOCK(); 1957 return (NULL); 1958} 1959 1960/* 1961 * Find an association with the pointer to the inbound IP packet. This can be 1962 * a IPv4 or IPv6 packet. 1963 */ 1964struct sctp_tcb * 1965sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 1966 struct sctphdr *sh, struct sctp_chunkhdr *ch, 1967 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 1968{ 1969 int find_tcp_pool; 1970 struct ip *iph; 1971 struct sctp_tcb *retval; 1972 struct sockaddr_storage to_store, from_store; 1973 struct sockaddr *to = (struct sockaddr *)&to_store; 1974 struct sockaddr *from = (struct sockaddr *)&from_store; 1975 struct sctp_inpcb *inp; 1976 1977 iph = mtod(m, struct ip *); 1978 switch (iph->ip_v) { 1979 case IPVERSION: 1980 { 1981 /* its IPv4 */ 1982 struct sockaddr_in *from4; 1983 1984 from4 = (struct sockaddr_in *)&from_store; 1985 bzero(from4, sizeof(*from4)); 1986 from4->sin_family = AF_INET; 1987 from4->sin_len = sizeof(struct sockaddr_in); 1988 from4->sin_addr.s_addr = iph->ip_src.s_addr; 1989 from4->sin_port = sh->src_port; 1990 break; 1991 } 1992#ifdef INET6 1993 case IPV6_VERSION >> 4: 1994 { 1995 /* its IPv6 */ 1996 struct ip6_hdr *ip6; 1997 struct sockaddr_in6 *from6; 1998 1999 ip6 = mtod(m, struct ip6_hdr *); 2000 from6 = (struct sockaddr_in6 *)&from_store; 2001 bzero(from6, sizeof(*from6)); 2002 from6->sin6_family = AF_INET6; 2003 from6->sin6_len = sizeof(struct sockaddr_in6); 2004 from6->sin6_addr = ip6->ip6_src; 2005 from6->sin6_port = sh->src_port; 2006 /* Get the scopes in properly to the sin6 addr's */ 2007 /* we probably don't need these operations */ 2008 (void)sa6_recoverscope(from6); 2009 sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone)); 2010 break; 2011 } 2012#endif 2013 default: 2014 /* Currently not supported. */ 2015 return (NULL); 2016 } 2017 2018 2019 switch (iph->ip_v) { 2020 case IPVERSION: 2021 { 2022 /* its IPv4 */ 2023 struct sockaddr_in *to4; 2024 2025 to4 = (struct sockaddr_in *)&to_store; 2026 bzero(to4, sizeof(*to4)); 2027 to4->sin_family = AF_INET; 2028 to4->sin_len = sizeof(struct sockaddr_in); 2029 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 2030 to4->sin_port = sh->dest_port; 2031 break; 2032 } 2033#ifdef INET6 2034 case IPV6_VERSION >> 4: 2035 { 2036 /* its IPv6 */ 2037 struct ip6_hdr *ip6; 2038 struct sockaddr_in6 *to6; 2039 2040 ip6 = mtod(m, struct ip6_hdr *); 2041 to6 = (struct sockaddr_in6 *)&to_store; 2042 bzero(to6, sizeof(*to6)); 2043 to6->sin6_family = AF_INET6; 2044 to6->sin6_len = sizeof(struct sockaddr_in6); 2045 to6->sin6_addr = ip6->ip6_dst; 2046 to6->sin6_port = sh->dest_port; 2047 /* Get the scopes in properly to the sin6 addr's */ 2048 /* we probably don't need these operations */ 2049 (void)sa6_recoverscope(to6); 2050 sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone)); 2051 break; 2052 } 2053#endif 2054 default: 2055 /* TSNH */ 2056 break; 2057 } 2058 if (sh->v_tag) { 2059 /* we only go down this path if vtag is non-zero */ 2060 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag), 2061 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2062 if (retval) { 2063 return (retval); 2064 } 2065 } 2066 find_tcp_pool = 0; 2067 if ((ch->chunk_type != SCTP_INITIATION) && 2068 (ch->chunk_type != SCTP_INITIATION_ACK) && 2069 (ch->chunk_type != SCTP_COOKIE_ACK) && 2070 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2071 /* Other chunk types go to the tcp pool. */ 2072 find_tcp_pool = 1; 2073 } 2074 if (inp_p) { 2075 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 2076 find_tcp_pool, vrf_id); 2077 inp = *inp_p; 2078 } else { 2079 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 2080 find_tcp_pool, vrf_id); 2081 } 2082 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2083 if (retval == NULL && inp) { 2084 /* Found a EP but not this address */ 2085 if ((ch->chunk_type == SCTP_INITIATION) || 2086 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2087 /*- 2088 * special hook, we do NOT return linp or an 2089 * association that is linked to an existing 2090 * association that is under the TCP pool (i.e. no 2091 * listener exists). The endpoint finding routine 2092 * will always find a listner before examining the 2093 * TCP pool. 2094 */ 2095 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2096 if (inp_p) { 2097 *inp_p = NULL; 2098 } 2099 return (NULL); 2100 } 2101 retval = sctp_findassociation_special_addr(m, iphlen, 2102 offset, sh, &inp, netp, to); 2103 if (inp_p != NULL) { 2104 *inp_p = inp; 2105 } 2106 } 2107 } 2108 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2109 return (retval); 2110} 2111 2112/* 2113 * lookup an association by an ASCONF lookup address. 2114 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2115 */ 2116struct sctp_tcb * 2117sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 2118 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2119{ 2120 struct sctp_tcb *stcb; 2121 struct sockaddr_in *sin; 2122 2123#ifdef INET6 2124 struct sockaddr_in6 *sin6; 2125 2126#endif 2127 struct sockaddr_storage local_store, remote_store; 2128 struct sockaddr *to; 2129 struct ip *iph; 2130 2131#ifdef INET6 2132 struct ip6_hdr *ip6; 2133 2134#endif 2135 struct sctp_paramhdr parm_buf, *phdr; 2136 int ptype; 2137 int zero_address = 0; 2138 2139 2140 memset(&local_store, 0, sizeof(local_store)); 2141 memset(&remote_store, 0, sizeof(remote_store)); 2142 to = (struct sockaddr *)&local_store; 2143 /* First get the destination address setup too. */ 2144 iph = mtod(m, struct ip *); 2145 switch (iph->ip_v) { 2146 case IPVERSION: 2147 /* its IPv4 */ 2148 sin = (struct sockaddr_in *)&local_store; 2149 sin->sin_family = AF_INET; 2150 sin->sin_len = sizeof(*sin); 2151 sin->sin_port = sh->dest_port; 2152 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 2153 break; 2154#ifdef INET6 2155 case IPV6_VERSION >> 4: 2156 /* its IPv6 */ 2157 ip6 = mtod(m, struct ip6_hdr *); 2158 sin6 = (struct sockaddr_in6 *)&local_store; 2159 sin6->sin6_family = AF_INET6; 2160 sin6->sin6_len = sizeof(*sin6); 2161 sin6->sin6_port = sh->dest_port; 2162 sin6->sin6_addr = ip6->ip6_dst; 2163 break; 2164#endif 2165 default: 2166 return NULL; 2167 } 2168 2169 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2170 &parm_buf, sizeof(struct sctp_paramhdr)); 2171 if (phdr == NULL) { 2172 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2173 __FUNCTION__); 2174 return NULL; 2175 } 2176 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2177 /* get the correlation address */ 2178 switch (ptype) { 2179#ifdef INET6 2180 case SCTP_IPV6_ADDRESS: 2181 { 2182 /* ipv6 address param */ 2183 struct sctp_ipv6addr_param *p6, p6_buf; 2184 2185 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2186 return NULL; 2187 } 2188 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2189 offset + sizeof(struct sctp_asconf_chunk), 2190 &p6_buf.ph, sizeof(*p6)); 2191 if (p6 == NULL) { 2192 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2193 __FUNCTION__); 2194 return (NULL); 2195 } 2196 sin6 = (struct sockaddr_in6 *)&remote_store; 2197 sin6->sin6_family = AF_INET6; 2198 sin6->sin6_len = sizeof(*sin6); 2199 sin6->sin6_port = sh->src_port; 2200 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2201 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2202 zero_address = 1; 2203 break; 2204 } 2205#endif 2206 case SCTP_IPV4_ADDRESS: 2207 { 2208 /* ipv4 address param */ 2209 struct sctp_ipv4addr_param *p4, p4_buf; 2210 2211 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2212 return NULL; 2213 } 2214 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2215 offset + sizeof(struct sctp_asconf_chunk), 2216 &p4_buf.ph, sizeof(*p4)); 2217 if (p4 == NULL) { 2218 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2219 __FUNCTION__); 2220 return (NULL); 2221 } 2222 sin = (struct sockaddr_in *)&remote_store; 2223 sin->sin_family = AF_INET; 2224 sin->sin_len = sizeof(*sin); 2225 sin->sin_port = sh->src_port; 2226 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2227 if (sin->sin_addr.s_addr == INADDR_ANY) 2228 zero_address = 1; 2229 break; 2230 } 2231 default: 2232 /* invalid address param type */ 2233 return NULL; 2234 } 2235 2236 if (zero_address) { 2237 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p, 2238 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2239 /* 2240 * printf("findassociation_ep_asconf: zero lookup address 2241 * finds stcb 0x%x\n", (uint32_t)stcb); 2242 */ 2243 } else { 2244 stcb = sctp_findassociation_ep_addr(inp_p, 2245 (struct sockaddr *)&remote_store, netp, 2246 to, NULL); 2247 } 2248 return (stcb); 2249} 2250 2251 2252/* 2253 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2254 * addresses. This way if we don't get a bind we by default pick a ephemeral 2255 * port with all addresses bound. 2256 */ 2257int 2258sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2259{ 2260 /* 2261 * we get called when a new endpoint starts up. We need to allocate 2262 * the sctp_inpcb structure from the zone and init it. Mark it as 2263 * unbound and find a port that we can use as an ephemeral with 2264 * INADDR_ANY. If the user binds later no problem we can then add in 2265 * the specific addresses. And setup the default parameters for the 2266 * EP. 2267 */ 2268 int i, error; 2269 struct sctp_inpcb *inp; 2270 struct sctp_pcb *m; 2271 struct timeval time; 2272 sctp_sharedkey_t *null_key; 2273 2274 error = 0; 2275 2276 SCTP_INP_INFO_WLOCK(); 2277 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2278 if (inp == NULL) { 2279 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2280 SCTP_INP_INFO_WUNLOCK(); 2281 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2282 return (ENOBUFS); 2283 } 2284 /* zap it */ 2285 bzero(inp, sizeof(*inp)); 2286 2287 /* bump generations */ 2288 /* setup socket pointers */ 2289 inp->sctp_socket = so; 2290 inp->ip_inp.inp.inp_socket = so; 2291 inp->sctp_associd_counter = 1; 2292 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2293 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2294 /* init the small hash table we use to track asocid <-> tcb */ 2295 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2296 if (inp->sctp_asocidhash == NULL) { 2297 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2298 SCTP_INP_INFO_WUNLOCK(); 2299 return (ENOBUFS); 2300 } 2301#ifdef IPSEC 2302 { 2303 struct inpcbpolicy *pcb_sp = NULL; 2304 2305 error = ipsec_init_policy(so, &pcb_sp); 2306 /* Arrange to share the policy */ 2307 inp->ip_inp.inp.inp_sp = pcb_sp; 2308 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2309 } 2310 if (error != 0) { 2311 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2312 SCTP_INP_INFO_WUNLOCK(); 2313 return error; 2314 } 2315#endif /* IPSEC */ 2316 SCTP_INCR_EP_COUNT(); 2317 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2318 SCTP_INP_INFO_WUNLOCK(); 2319 2320 so->so_pcb = (caddr_t)inp; 2321 2322 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 2323 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 2324 /* UDP style socket */ 2325 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2326 SCTP_PCB_FLAGS_UNBOUND); 2327 /* Be sure it is NON-BLOCKING IO for UDP */ 2328 /* SCTP_SET_SO_NBIO(so); */ 2329 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2330 /* TCP style socket */ 2331 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2332 SCTP_PCB_FLAGS_UNBOUND); 2333 /* Be sure we have blocking IO by default */ 2334 SCTP_CLEAR_SO_NBIO(so); 2335 } else { 2336 /* 2337 * unsupported socket type (RAW, etc)- in case we missed it 2338 * in protosw 2339 */ 2340 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2341 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2342 return (EOPNOTSUPP); 2343 } 2344 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2345 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2346 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2347 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2348 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2349 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2350 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2351 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2352 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2353 } 2354 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2355 &inp->sctp_hashmark); 2356 if (inp->sctp_tcbhash == NULL) { 2357 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2358 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2359 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2360 return (ENOBUFS); 2361 } 2362 inp->def_vrf_id = vrf_id; 2363 2364 SCTP_INP_INFO_WLOCK(); 2365 SCTP_INP_LOCK_INIT(inp); 2366 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2367 SCTP_INP_READ_INIT(inp); 2368 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2369 /* lock the new ep */ 2370 SCTP_INP_WLOCK(inp); 2371 2372 /* add it to the info area */ 2373 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2374 SCTP_INP_INFO_WUNLOCK(); 2375 2376 TAILQ_INIT(&inp->read_queue); 2377 LIST_INIT(&inp->sctp_addr_list); 2378 2379 LIST_INIT(&inp->sctp_asoc_list); 2380 2381#ifdef SCTP_TRACK_FREED_ASOCS 2382 /* TEMP CODE */ 2383 LIST_INIT(&inp->sctp_asoc_free_list); 2384#endif 2385 /* Init the timer structure for signature change */ 2386 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2387 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2388 2389 /* now init the actual endpoint default data */ 2390 m = &inp->sctp_ep; 2391 2392 /* setup the base timeout information */ 2393 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2394 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2395 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2396 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2397 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2398 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2399 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2400 /* all max/min max are in ms */ 2401 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2402 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2403 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2404 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2405 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2406 2407 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2408 2409 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2410 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2411 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2412 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2413 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2414 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2415 if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) && 2416 (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) { 2417 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2418 } else { 2419 /* sysctl done with invalid value, set to 2581 */ 2420 m->sctp_default_cc_module = SCTP_CC_RFC2581; 2421 } 2422 /* number of streams to pre-open on a association */ 2423 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2424 2425 /* Add adaptation cookie */ 2426 m->adaptation_layer_indicator = 0x504C5253; 2427 2428 /* seed random number generator */ 2429 m->random_counter = 1; 2430 m->store_at = SCTP_SIGNATURE_SIZE; 2431 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2432 sctp_fill_random_store(m); 2433 2434 /* Minimum cookie size */ 2435 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2436 sizeof(struct sctp_state_cookie); 2437 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2438 2439 /* Setup the initial secret */ 2440 (void)SCTP_GETTIME_TIMEVAL(&time); 2441 m->time_of_secret_change = time.tv_sec; 2442 2443 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2444 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2445 } 2446 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2447 2448 /* How long is a cookie good for ? */ 2449 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2450 /* 2451 * Initialize authentication parameters 2452 */ 2453 m->local_hmacs = sctp_default_supported_hmaclist(); 2454 m->local_auth_chunks = sctp_alloc_chunklist(); 2455 sctp_auth_set_default_chunks(m->local_auth_chunks); 2456 LIST_INIT(&m->shared_keys); 2457 /* add default NULL key as key id 0 */ 2458 null_key = sctp_alloc_sharedkey(); 2459 sctp_insert_sharedkey(&m->shared_keys, null_key); 2460 SCTP_INP_WUNLOCK(inp); 2461#ifdef SCTP_LOG_CLOSING 2462 sctp_log_closing(inp, NULL, 12); 2463#endif 2464 return (error); 2465} 2466 2467 2468void 2469sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2470 struct sctp_tcb *stcb) 2471{ 2472 struct sctp_nets *net; 2473 uint16_t lport, rport; 2474 struct sctppcbhead *head; 2475 struct sctp_laddr *laddr, *oladdr; 2476 2477 atomic_add_int(&stcb->asoc.refcnt, 1); 2478 SCTP_TCB_UNLOCK(stcb); 2479 SCTP_INP_INFO_WLOCK(); 2480 SCTP_INP_WLOCK(old_inp); 2481 SCTP_INP_WLOCK(new_inp); 2482 SCTP_TCB_LOCK(stcb); 2483 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2484 2485 new_inp->sctp_ep.time_of_secret_change = 2486 old_inp->sctp_ep.time_of_secret_change; 2487 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2488 sizeof(old_inp->sctp_ep.secret_key)); 2489 new_inp->sctp_ep.current_secret_number = 2490 old_inp->sctp_ep.current_secret_number; 2491 new_inp->sctp_ep.last_secret_number = 2492 old_inp->sctp_ep.last_secret_number; 2493 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2494 2495 /* make it so new data pours into the new socket */ 2496 stcb->sctp_socket = new_inp->sctp_socket; 2497 stcb->sctp_ep = new_inp; 2498 2499 /* Copy the port across */ 2500 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2501 rport = stcb->rport; 2502 /* Pull the tcb from the old association */ 2503 LIST_REMOVE(stcb, sctp_tcbhash); 2504 LIST_REMOVE(stcb, sctp_tcblist); 2505 if (stcb->asoc.in_asocid_hash) { 2506 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2507 } 2508 /* Now insert the new_inp into the TCP connected hash */ 2509 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), 2510 SCTP_BASE_INFO(hashtcpmark))]; 2511 2512 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2513 /* Its safe to access */ 2514 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2515 2516 /* Now move the tcb into the endpoint list */ 2517 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2518 /* 2519 * Question, do we even need to worry about the ep-hash since we 2520 * only have one connection? Probably not :> so lets get rid of it 2521 * and not suck up any kernel memory in that. 2522 */ 2523 if (stcb->asoc.in_asocid_hash) { 2524 struct sctpasochead *lhd; 2525 2526 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2527 new_inp->hashasocidmark)]; 2528 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2529 } 2530 /* Ok. Let's restart timer. */ 2531 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2532 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2533 stcb, net); 2534 } 2535 2536 SCTP_INP_INFO_WUNLOCK(); 2537 if (new_inp->sctp_tcbhash != NULL) { 2538 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2539 new_inp->sctp_tcbhash = NULL; 2540 } 2541 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2542 /* Subset bound, so copy in the laddr list from the old_inp */ 2543 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2544 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2545 if (laddr == NULL) { 2546 /* 2547 * Gak, what can we do? This assoc is really 2548 * HOSED. We probably should send an abort 2549 * here. 2550 */ 2551 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2552 continue; 2553 } 2554 SCTP_INCR_LADDR_COUNT(); 2555 bzero(laddr, sizeof(*laddr)); 2556 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2557 laddr->ifa = oladdr->ifa; 2558 atomic_add_int(&laddr->ifa->refcount, 1); 2559 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2560 sctp_nxt_addr); 2561 new_inp->laddr_count++; 2562 } 2563 } 2564 /* 2565 * Now any running timers need to be adjusted since we really don't 2566 * care if they are running or not just blast in the new_inp into 2567 * all of them. 2568 */ 2569 2570 stcb->asoc.hb_timer.ep = (void *)new_inp; 2571 stcb->asoc.dack_timer.ep = (void *)new_inp; 2572 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2573 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2574 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2575 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2576 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2577 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2578 /* now what about the nets? */ 2579 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2580 net->pmtu_timer.ep = (void *)new_inp; 2581 net->rxt_timer.ep = (void *)new_inp; 2582 net->fr_timer.ep = (void *)new_inp; 2583 } 2584 SCTP_INP_WUNLOCK(new_inp); 2585 SCTP_INP_WUNLOCK(old_inp); 2586} 2587 2588 2589 2590 2591/* sctp_ifap is used to bypass normal local address validation checks */ 2592int 2593sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2594 struct sctp_ifa *sctp_ifap, struct thread *p) 2595{ 2596 /* bind a ep to a socket address */ 2597 struct sctppcbhead *head; 2598 struct sctp_inpcb *inp, *inp_tmp; 2599 struct inpcb *ip_inp; 2600 int port_reuse_active = 0; 2601 int bindall; 2602 uint16_t lport; 2603 int error; 2604 uint32_t vrf_id; 2605 2606 lport = 0; 2607 error = 0; 2608 bindall = 1; 2609 inp = (struct sctp_inpcb *)so->so_pcb; 2610 ip_inp = (struct inpcb *)so->so_pcb; 2611#ifdef SCTP_DEBUG 2612 if (addr) { 2613 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2614 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2615 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2616 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2617 } 2618#endif 2619 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2620 /* already did a bind, subsequent binds NOT allowed ! */ 2621 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2622 return (EINVAL); 2623 } 2624#ifdef INVARIANTS 2625 if (p == NULL) 2626 panic("null proc/thread"); 2627#endif 2628 if (addr != NULL) { 2629 switch (addr->sa_family) { 2630 case AF_INET: 2631 { 2632 struct sockaddr_in *sin; 2633 2634 /* IPV6_V6ONLY socket? */ 2635 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2636 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2637 return (EINVAL); 2638 } 2639 if (addr->sa_len != sizeof(*sin)) { 2640 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2641 return (EINVAL); 2642 } 2643 sin = (struct sockaddr_in *)addr; 2644 lport = sin->sin_port; 2645 /* 2646 * For LOOPBACK the prison_local_ip4() call 2647 * will transmute the ip address to the 2648 * proper value. 2649 */ 2650 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2651 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2652 return (error); 2653 } 2654 if (sin->sin_addr.s_addr != INADDR_ANY) { 2655 bindall = 0; 2656 } 2657 break; 2658 } 2659#ifdef INET6 2660 case AF_INET6: 2661 { 2662 /* 2663 * Only for pure IPv6 Address. (No IPv4 2664 * Mapped!) 2665 */ 2666 struct sockaddr_in6 *sin6; 2667 2668 sin6 = (struct sockaddr_in6 *)addr; 2669 2670 if (addr->sa_len != sizeof(*sin6)) { 2671 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2672 return (EINVAL); 2673 } 2674 lport = sin6->sin6_port; 2675 2676 /* 2677 * For LOOPBACK the prison_local_ip6() call 2678 * will transmute the ipv6 address to the 2679 * proper value. 2680 */ 2681 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2682 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2683 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2684 return (error); 2685 } 2686 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2687 bindall = 0; 2688 /* KAME hack: embed scopeid */ 2689 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2690 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2691 return (EINVAL); 2692 } 2693 } 2694 /* this must be cleared for ifa_ifwithaddr() */ 2695 sin6->sin6_scope_id = 0; 2696 break; 2697 } 2698#endif 2699 default: 2700 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2701 return (EAFNOSUPPORT); 2702 } 2703 } 2704 SCTP_INP_INFO_WLOCK(); 2705 SCTP_INP_WLOCK(inp); 2706 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2707 vrf_id = inp->def_vrf_id; 2708 2709 /* increase our count due to the unlock we do */ 2710 SCTP_INP_INCR_REF(inp); 2711 if (lport) { 2712 /* 2713 * Did the caller specify a port? if so we must see if a ep 2714 * already has this one bound. 2715 */ 2716 /* got to be root to get at low ports */ 2717 if (ntohs(lport) < IPPORT_RESERVED) { 2718 if (p && (error = 2719 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2720 )) { 2721 SCTP_INP_DECR_REF(inp); 2722 SCTP_INP_WUNLOCK(inp); 2723 SCTP_INP_INFO_WUNLOCK(); 2724 return (error); 2725 } 2726 } 2727 if (p == NULL) { 2728 SCTP_INP_DECR_REF(inp); 2729 SCTP_INP_WUNLOCK(inp); 2730 SCTP_INP_INFO_WUNLOCK(); 2731 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2732 return (error); 2733 } 2734 SCTP_INP_WUNLOCK(inp); 2735 if (bindall) { 2736 vrf_id = inp->def_vrf_id; 2737 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2738 if (inp_tmp != NULL) { 2739 /* 2740 * lock guy returned and lower count note 2741 * that we are not bound so inp_tmp should 2742 * NEVER be inp. And it is this inp 2743 * (inp_tmp) that gets the reference bump, 2744 * so we must lower it. 2745 */ 2746 SCTP_INP_DECR_REF(inp_tmp); 2747 /* unlock info */ 2748 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2749 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2750 /* 2751 * Ok, must be one-2-one and 2752 * allowing port re-use 2753 */ 2754 port_reuse_active = 1; 2755 goto continue_anyway; 2756 } 2757 SCTP_INP_DECR_REF(inp); 2758 SCTP_INP_INFO_WUNLOCK(); 2759 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2760 return (EADDRINUSE); 2761 } 2762 } else { 2763 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2764 if (inp_tmp != NULL) { 2765 /* 2766 * lock guy returned and lower count note 2767 * that we are not bound so inp_tmp should 2768 * NEVER be inp. And it is this inp 2769 * (inp_tmp) that gets the reference bump, 2770 * so we must lower it. 2771 */ 2772 SCTP_INP_DECR_REF(inp_tmp); 2773 /* unlock info */ 2774 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2775 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2776 /* 2777 * Ok, must be one-2-one and 2778 * allowing port re-use 2779 */ 2780 port_reuse_active = 1; 2781 goto continue_anyway; 2782 } 2783 SCTP_INP_DECR_REF(inp); 2784 SCTP_INP_INFO_WUNLOCK(); 2785 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2786 return (EADDRINUSE); 2787 } 2788 } 2789continue_anyway: 2790 SCTP_INP_WLOCK(inp); 2791 if (bindall) { 2792 /* verify that no lport is not used by a singleton */ 2793 if ((port_reuse_active == 0) && 2794 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2795 ) { 2796 /* Sorry someone already has this one bound */ 2797 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2798 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2799 port_reuse_active = 1; 2800 } else { 2801 SCTP_INP_DECR_REF(inp); 2802 SCTP_INP_WUNLOCK(inp); 2803 SCTP_INP_INFO_WUNLOCK(); 2804 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2805 return (EADDRINUSE); 2806 } 2807 } 2808 } 2809 } else { 2810 uint16_t first, last, candidate; 2811 uint16_t count; 2812 int done; 2813 2814 if (ip_inp->inp_flags & INP_HIGHPORT) { 2815 first = MODULE_GLOBAL(ipport_hifirstauto); 2816 last = MODULE_GLOBAL(ipport_hilastauto); 2817 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2818 if (p && (error = 2819 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2820 )) { 2821 SCTP_INP_DECR_REF(inp); 2822 SCTP_INP_WUNLOCK(inp); 2823 SCTP_INP_INFO_WUNLOCK(); 2824 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2825 return (error); 2826 } 2827 first = MODULE_GLOBAL(ipport_lowfirstauto); 2828 last = MODULE_GLOBAL(ipport_lowlastauto); 2829 } else { 2830 first = MODULE_GLOBAL(ipport_firstauto); 2831 last = MODULE_GLOBAL(ipport_lastauto); 2832 } 2833 if (first > last) { 2834 uint16_t temp; 2835 2836 temp = first; 2837 first = last; 2838 last = temp; 2839 } 2840 count = last - first + 1; /* number of candidates */ 2841 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2842 2843 done = 0; 2844 while (!done) { 2845 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2846 done = 1; 2847 } 2848 if (!done) { 2849 if (--count == 0) { 2850 SCTP_INP_DECR_REF(inp); 2851 SCTP_INP_WUNLOCK(inp); 2852 SCTP_INP_INFO_WUNLOCK(); 2853 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2854 return (EADDRINUSE); 2855 } 2856 if (candidate == last) 2857 candidate = first; 2858 else 2859 candidate = candidate + 1; 2860 } 2861 } 2862 lport = htons(candidate); 2863 } 2864 SCTP_INP_DECR_REF(inp); 2865 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2866 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2867 /* 2868 * this really should not happen. The guy did a non-blocking 2869 * bind and then did a close at the same time. 2870 */ 2871 SCTP_INP_WUNLOCK(inp); 2872 SCTP_INP_INFO_WUNLOCK(); 2873 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2874 return (EINVAL); 2875 } 2876 /* ok we look clear to give out this port, so lets setup the binding */ 2877 if (bindall) { 2878 /* binding to all addresses, so just set in the proper flags */ 2879 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2880 /* set the automatic addr changes from kernel flag */ 2881 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2882 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2883 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2884 } else { 2885 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2886 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2887 } 2888 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2889 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2890 } else { 2891 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2892 } 2893 /* 2894 * set the automatic mobility_base from kernel flag (by 2895 * micchie) 2896 */ 2897 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 2898 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 2899 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2900 } else { 2901 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 2902 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2903 } 2904 /* 2905 * set the automatic mobility_fasthandoff from kernel flag 2906 * (by micchie) 2907 */ 2908 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 2909 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 2910 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2911 } else { 2912 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 2913 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2914 } 2915 } else { 2916 /* 2917 * bind specific, make sure flags is off and add a new 2918 * address structure to the sctp_addr_list inside the ep 2919 * structure. 2920 * 2921 * We will need to allocate one and insert it at the head. The 2922 * socketopt call can just insert new addresses in there as 2923 * well. It will also have to do the embed scope kame hack 2924 * too (before adding). 2925 */ 2926 struct sctp_ifa *ifa; 2927 struct sockaddr_storage store_sa; 2928 2929 memset(&store_sa, 0, sizeof(store_sa)); 2930 if (addr->sa_family == AF_INET) { 2931 struct sockaddr_in *sin; 2932 2933 sin = (struct sockaddr_in *)&store_sa; 2934 memcpy(sin, addr, sizeof(struct sockaddr_in)); 2935 sin->sin_port = 0; 2936 } else if (addr->sa_family == AF_INET6) { 2937 struct sockaddr_in6 *sin6; 2938 2939 sin6 = (struct sockaddr_in6 *)&store_sa; 2940 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 2941 sin6->sin6_port = 0; 2942 } 2943 /* 2944 * first find the interface with the bound address need to 2945 * zero out the port to find the address! yuck! can't do 2946 * this earlier since need port for sctp_pcb_findep() 2947 */ 2948 if (sctp_ifap != NULL) 2949 ifa = sctp_ifap; 2950 else { 2951 /* 2952 * Note for BSD we hit here always other O/S's will 2953 * pass things in via the sctp_ifap argument 2954 * (Panda). 2955 */ 2956 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 2957 vrf_id, SCTP_ADDR_NOT_LOCKED); 2958 } 2959 if (ifa == NULL) { 2960 /* Can't find an interface with that address */ 2961 SCTP_INP_WUNLOCK(inp); 2962 SCTP_INP_INFO_WUNLOCK(); 2963 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 2964 return (EADDRNOTAVAIL); 2965 } 2966 if (addr->sa_family == AF_INET6) { 2967 /* GAK, more FIXME IFA lock? */ 2968 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2969 /* Can't bind a non-existent addr. */ 2970 SCTP_INP_WUNLOCK(inp); 2971 SCTP_INP_INFO_WUNLOCK(); 2972 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2973 return (EINVAL); 2974 } 2975 } 2976 /* we're not bound all */ 2977 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 2978 /* allow bindx() to send ASCONF's for binding changes */ 2979 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2980 /* clear automatic addr changes from kernel flag */ 2981 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2982 2983 /* add this address to the endpoint list */ 2984 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 2985 if (error != 0) { 2986 SCTP_INP_WUNLOCK(inp); 2987 SCTP_INP_INFO_WUNLOCK(); 2988 return (error); 2989 } 2990 inp->laddr_count++; 2991 } 2992 /* find the bucket */ 2993 if (port_reuse_active) { 2994 /* Put it into tcp 1-2-1 hash */ 2995 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), 2996 SCTP_BASE_INFO(hashtcpmark))]; 2997 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 2998 } else { 2999 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 3000 SCTP_BASE_INFO(hashmark))]; 3001 } 3002 /* put it in the bucket */ 3003 LIST_INSERT_HEAD(head, inp, sctp_hash); 3004 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3005 head, ntohs(lport), port_reuse_active); 3006 /* set in the port */ 3007 inp->sctp_lport = lport; 3008 3009 /* turn off just the unbound flag */ 3010 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3011 SCTP_INP_WUNLOCK(inp); 3012 SCTP_INP_INFO_WUNLOCK(); 3013 return (0); 3014} 3015 3016 3017static void 3018sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3019{ 3020 struct sctp_iterator *it, *nit; 3021 3022 /* 3023 * We enter with the only the ITERATOR_LOCK in place and a write 3024 * lock on the inp_info stuff. 3025 */ 3026 it = sctp_it_ctl.cur_it; 3027 if (it && (it->vn != curvnet)) { 3028 /* Its not looking at our VNET */ 3029 return; 3030 } 3031 if (it && (it->inp == inp)) { 3032 /* 3033 * This is tricky and we hold the iterator lock, but when it 3034 * returns and gets the lock (when we release it) the 3035 * iterator will try to operate on inp. We need to stop that 3036 * from happening. But of course the iterator has a 3037 * reference on the stcb and inp. We can mark it and it will 3038 * stop. 3039 * 3040 * If its a single iterator situation, we set the end iterator 3041 * flag. Otherwise we set the iterator to go to the next 3042 * inp. 3043 * 3044 */ 3045 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3046 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3047 } else { 3048 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3049 } 3050 } 3051 /* 3052 * Now go through and remove any single reference to our inp that 3053 * may be still pending on the list 3054 */ 3055 SCTP_IPI_ITERATOR_WQ_LOCK(); 3056 it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead); 3057 while (it) { 3058 nit = TAILQ_NEXT(it, sctp_nxt_itr); 3059 if (it->vn != curvnet) { 3060 it = nit; 3061 continue; 3062 } 3063 if (it->inp == inp) { 3064 /* This one points to me is it inp specific? */ 3065 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3066 /* Remove and free this one */ 3067 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3068 it, sctp_nxt_itr); 3069 if (it->function_atend != NULL) { 3070 (*it->function_atend) (it->pointer, it->val); 3071 } 3072 SCTP_FREE(it, SCTP_M_ITER); 3073 } else { 3074 it->inp = LIST_NEXT(it->inp, sctp_list); 3075 } 3076 } 3077 it = nit; 3078 } 3079 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3080} 3081 3082/* release sctp_inpcb unbind the port */ 3083void 3084sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3085{ 3086 /* 3087 * Here we free a endpoint. We must find it (if it is in the Hash 3088 * table) and remove it from there. Then we must also find it in the 3089 * overall list and remove it from there. After all removals are 3090 * complete then any timer has to be stopped. Then start the actual 3091 * freeing. a) Any local lists. b) Any associations. c) The hash of 3092 * all associations. d) finally the ep itself. 3093 */ 3094 struct sctp_pcb *m; 3095 struct sctp_tcb *asoc, *nasoc; 3096 struct sctp_laddr *laddr, *nladdr; 3097 struct inpcb *ip_pcb; 3098 struct socket *so; 3099 int being_refed = 0; 3100 struct sctp_queued_to_read *sq; 3101 3102 3103 int cnt; 3104 sctp_sharedkey_t *shared_key; 3105 3106 3107#ifdef SCTP_LOG_CLOSING 3108 sctp_log_closing(inp, NULL, 0); 3109#endif 3110 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3111 /* 3112 * Once we are in we can remove the flag from = 1 is only 3113 * passed from the actual closing routines that are called 3114 * via the sockets layer. 3115 */ 3116 SCTP_ITERATOR_LOCK(); 3117 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3118 /* socket is gone, so no more wakeups allowed */ 3119 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3120 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3121 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3122 3123 /* mark any iterators on the list or being processed */ 3124 sctp_iterator_inp_being_freed(inp); 3125 SCTP_ITERATOR_UNLOCK(); 3126 } 3127 so = inp->sctp_socket; 3128 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3129 /* been here before.. eeks.. get out of here */ 3130 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3131#ifdef SCTP_LOG_CLOSING 3132 sctp_log_closing(inp, NULL, 1); 3133#endif 3134 return; 3135 } 3136 SCTP_ASOC_CREATE_LOCK(inp); 3137 SCTP_INP_INFO_WLOCK(); 3138 3139 SCTP_INP_WLOCK(inp); 3140 /* First time through we have the socket lock, after that no more. */ 3141 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3142 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3143 3144 if (inp->control) { 3145 sctp_m_freem(inp->control); 3146 inp->control = NULL; 3147 } 3148 if (inp->pkt) { 3149 sctp_m_freem(inp->pkt); 3150 inp->pkt = NULL; 3151 } 3152 m = &inp->sctp_ep; 3153 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3154 * here but I will be nice :> (i.e. 3155 * ip_pcb = ep;) */ 3156 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3157 int cnt_in_sd; 3158 3159 cnt_in_sd = 0; 3160 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 3161 asoc = nasoc) { 3162 SCTP_TCB_LOCK(asoc); 3163 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3164 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3165 /* Skip guys being freed */ 3166 cnt_in_sd++; 3167 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3168 /* 3169 * Special case - we did not start a 3170 * kill timer on the asoc due to it 3171 * was not closed. So go ahead and 3172 * start it now. 3173 */ 3174 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3175 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3176 } 3177 SCTP_TCB_UNLOCK(asoc); 3178 continue; 3179 } 3180 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3181 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3182 (asoc->asoc.total_output_queue_size == 0)) { 3183 /* 3184 * If we have data in queue, we don't want 3185 * to just free since the app may have done, 3186 * send()/close or connect/send/close. And 3187 * it wants the data to get across first. 3188 */ 3189 /* Just abandon things in the front states */ 3190 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3191 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3192 cnt_in_sd++; 3193 } 3194 continue; 3195 } 3196 /* Disconnect the socket please */ 3197 asoc->sctp_socket = NULL; 3198 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3199 if ((asoc->asoc.size_on_reasm_queue > 0) || 3200 (asoc->asoc.control_pdapi) || 3201 (asoc->asoc.size_on_all_streams > 0) || 3202 (so && (so->so_rcv.sb_cc > 0)) 3203 ) { 3204 /* Left with Data unread */ 3205 struct mbuf *op_err; 3206 3207 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3208 0, M_DONTWAIT, 1, MT_DATA); 3209 if (op_err) { 3210 /* Fill in the user initiated abort */ 3211 struct sctp_paramhdr *ph; 3212 uint32_t *ippp; 3213 3214 SCTP_BUF_LEN(op_err) = 3215 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3216 ph = mtod(op_err, 3217 struct sctp_paramhdr *); 3218 ph->param_type = htons( 3219 SCTP_CAUSE_USER_INITIATED_ABT); 3220 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3221 ippp = (uint32_t *) (ph + 1); 3222 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3223 } 3224 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3225#if defined(SCTP_PANIC_ON_ABORT) 3226 panic("inpcb_free does an abort"); 3227#endif 3228 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3229 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3230 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3231 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3232 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3233 } 3234 if (sctp_free_assoc(inp, asoc, 3235 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3236 cnt_in_sd++; 3237 } 3238 continue; 3239 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3240 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3241 (asoc->asoc.stream_queue_cnt == 0) 3242 ) { 3243 if (asoc->asoc.locked_on_sending) { 3244 goto abort_anyway; 3245 } 3246 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3247 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3248 /* 3249 * there is nothing queued to send, 3250 * so I send shutdown 3251 */ 3252 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 3253 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3254 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3255 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3256 } 3257 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3258 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3259 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3260 asoc->asoc.primary_destination); 3261 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3262 asoc->asoc.primary_destination); 3263 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3264 } 3265 } else { 3266 /* mark into shutdown pending */ 3267 struct sctp_stream_queue_pending *sp; 3268 3269 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3270 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3271 asoc->asoc.primary_destination); 3272 if (asoc->asoc.locked_on_sending) { 3273 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3274 sctp_streamhead); 3275 if (sp == NULL) { 3276 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3277 asoc->asoc.locked_on_sending, 3278 asoc->asoc.locked_on_sending->stream_no); 3279 } else { 3280 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3281 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3282 } 3283 } 3284 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3285 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3286 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3287 struct mbuf *op_err; 3288 3289 abort_anyway: 3290 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3291 0, M_DONTWAIT, 1, MT_DATA); 3292 if (op_err) { 3293 /* 3294 * Fill in the user 3295 * initiated abort 3296 */ 3297 struct sctp_paramhdr *ph; 3298 uint32_t *ippp; 3299 3300 SCTP_BUF_LEN(op_err) = 3301 (sizeof(struct sctp_paramhdr) + 3302 sizeof(uint32_t)); 3303 ph = mtod(op_err, 3304 struct sctp_paramhdr *); 3305 ph->param_type = htons( 3306 SCTP_CAUSE_USER_INITIATED_ABT); 3307 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3308 ippp = (uint32_t *) (ph + 1); 3309 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3310 } 3311 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3312#if defined(SCTP_PANIC_ON_ABORT) 3313 panic("inpcb_free does an abort"); 3314#endif 3315 3316 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3317 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3318 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3319 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3320 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3321 } 3322 if (sctp_free_assoc(inp, asoc, 3323 SCTP_PCBFREE_NOFORCE, 3324 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3325 cnt_in_sd++; 3326 } 3327 continue; 3328 } else { 3329 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3330 } 3331 } 3332 cnt_in_sd++; 3333 SCTP_TCB_UNLOCK(asoc); 3334 } 3335 /* now is there some left in our SHUTDOWN state? */ 3336 if (cnt_in_sd) { 3337 SCTP_INP_WUNLOCK(inp); 3338 SCTP_ASOC_CREATE_UNLOCK(inp); 3339 SCTP_INP_INFO_WUNLOCK(); 3340#ifdef SCTP_LOG_CLOSING 3341 sctp_log_closing(inp, NULL, 2); 3342#endif 3343 inp->sctp_socket = NULL; 3344 return; 3345 } 3346 } 3347 inp->sctp_socket = NULL; 3348 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3349 SCTP_PCB_FLAGS_UNBOUND) { 3350 /* 3351 * ok, this guy has been bound. It's port is somewhere in 3352 * the SCTP_BASE_INFO(hash table). Remove it! 3353 */ 3354 LIST_REMOVE(inp, sctp_hash); 3355 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3356 } 3357 /* 3358 * If there is a timer running to kill us, forget it, since it may 3359 * have a contest on the INP lock.. which would cause us to die ... 3360 */ 3361 cnt = 0; 3362 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 3363 asoc = nasoc) { 3364 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3365 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3366 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3367 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3368 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3369 } 3370 cnt++; 3371 continue; 3372 } 3373 /* Free associations that are NOT killing us */ 3374 SCTP_TCB_LOCK(asoc); 3375 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3376 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3377 struct mbuf *op_err; 3378 uint32_t *ippp; 3379 3380 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3381 0, M_DONTWAIT, 1, MT_DATA); 3382 if (op_err) { 3383 /* Fill in the user initiated abort */ 3384 struct sctp_paramhdr *ph; 3385 3386 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3387 sizeof(uint32_t)); 3388 ph = mtod(op_err, struct sctp_paramhdr *); 3389 ph->param_type = htons( 3390 SCTP_CAUSE_USER_INITIATED_ABT); 3391 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3392 ippp = (uint32_t *) (ph + 1); 3393 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3394 3395 } 3396 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3397#if defined(SCTP_PANIC_ON_ABORT) 3398 panic("inpcb_free does an abort"); 3399#endif 3400 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3401 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3402 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3403 cnt++; 3404 SCTP_TCB_UNLOCK(asoc); 3405 continue; 3406 } 3407 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3408 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3409 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3410 } 3411 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3412 cnt++; 3413 } 3414 } 3415 if (cnt) { 3416 /* Ok we have someone out there that will kill us */ 3417 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3418 SCTP_INP_WUNLOCK(inp); 3419 SCTP_ASOC_CREATE_UNLOCK(inp); 3420 SCTP_INP_INFO_WUNLOCK(); 3421#ifdef SCTP_LOG_CLOSING 3422 sctp_log_closing(inp, NULL, 3); 3423#endif 3424 return; 3425 } 3426 if (SCTP_INP_LOCK_CONTENDED(inp)) 3427 being_refed++; 3428 if (SCTP_INP_READ_CONTENDED(inp)) 3429 being_refed++; 3430 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3431 being_refed++; 3432 3433 if ((inp->refcount) || 3434 (being_refed) || 3435 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3436 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3437 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3438 SCTP_INP_WUNLOCK(inp); 3439 SCTP_ASOC_CREATE_UNLOCK(inp); 3440 SCTP_INP_INFO_WUNLOCK(); 3441#ifdef SCTP_LOG_CLOSING 3442 sctp_log_closing(inp, NULL, 4); 3443#endif 3444 return; 3445 } 3446 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3447 inp->sctp_ep.signature_change.type = 0; 3448 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3449 3450#ifdef SCTP_LOG_CLOSING 3451 sctp_log_closing(inp, NULL, 5); 3452#endif 3453 3454 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3455 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE; 3456 /* Clear the read queue */ 3457 if ((inp->sctp_asocidhash) != NULL) { 3458 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3459 inp->sctp_asocidhash = NULL; 3460 } 3461 /* sa_ignore FREED_MEMORY */ 3462 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { 3463 /* Its only abandoned if it had data left */ 3464 if (sq->length) 3465 SCTP_STAT_INCR(sctps_left_abandon); 3466 3467 TAILQ_REMOVE(&inp->read_queue, sq, next); 3468 sctp_free_remote_addr(sq->whoFrom); 3469 if (so) 3470 so->so_rcv.sb_cc -= sq->length; 3471 if (sq->data) { 3472 sctp_m_freem(sq->data); 3473 sq->data = NULL; 3474 } 3475 /* 3476 * no need to free the net count, since at this point all 3477 * assoc's are gone. 3478 */ 3479 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3480 SCTP_DECR_READQ_COUNT(); 3481 } 3482 /* Now the sctp_pcb things */ 3483 /* 3484 * free each asoc if it is not already closed/free. we can't use the 3485 * macro here since le_next will get freed as part of the 3486 * sctp_free_assoc() call. 3487 */ 3488 cnt = 0; 3489 if (so) { 3490#ifdef IPSEC 3491 ipsec_delete_pcbpolicy(ip_pcb); 3492#endif /* IPSEC */ 3493 3494 /* Unlocks not needed since the socket is gone now */ 3495 } 3496 if (ip_pcb->inp_options) { 3497 (void)sctp_m_free(ip_pcb->inp_options); 3498 ip_pcb->inp_options = 0; 3499 } 3500 if (ip_pcb->inp_moptions) { 3501 inp_freemoptions(ip_pcb->inp_moptions); 3502 ip_pcb->inp_moptions = 0; 3503 } 3504#ifdef INET6 3505 if (ip_pcb->inp_vflag & INP_IPV6) { 3506 struct in6pcb *in6p; 3507 3508 in6p = (struct in6pcb *)inp; 3509 ip6_freepcbopts(in6p->in6p_outputopts); 3510 } 3511#endif /* INET6 */ 3512 ip_pcb->inp_vflag = 0; 3513 /* free up authentication fields */ 3514 if (inp->sctp_ep.local_auth_chunks != NULL) 3515 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3516 if (inp->sctp_ep.local_hmacs != NULL) 3517 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3518 3519 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 3520 while (shared_key) { 3521 LIST_REMOVE(shared_key, next); 3522 sctp_free_sharedkey(shared_key); 3523 /* sa_ignore FREED_MEMORY */ 3524 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 3525 } 3526 3527 LIST_REMOVE(inp, sctp_list); 3528 3529 /* 3530 * if we have an address list the following will free the list of 3531 * ifaddr's that are set into this ep. Again macro limitations here, 3532 * since the LIST_FOREACH could be a bad idea. 3533 */ 3534 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; 3535 laddr = nladdr) { 3536 nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 3537 sctp_remove_laddr(laddr); 3538 } 3539 3540#ifdef SCTP_TRACK_FREED_ASOCS 3541 /* TEMP CODE */ 3542 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; 3543 asoc = nasoc) { 3544 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3545 LIST_REMOVE(asoc, sctp_tcblist); 3546 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3547 SCTP_DECR_ASOC_COUNT(); 3548 } 3549 /* *** END TEMP CODE *** */ 3550#endif 3551 /* Now lets see about freeing the EP hash table. */ 3552 if (inp->sctp_tcbhash != NULL) { 3553 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3554 inp->sctp_tcbhash = NULL; 3555 } 3556 /* Now we must put the ep memory back into the zone pool */ 3557 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3558 SCTP_INP_LOCK_DESTROY(inp); 3559 SCTP_INP_READ_DESTROY(inp); 3560 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3561 SCTP_INP_INFO_WUNLOCK(); 3562 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3563 SCTP_DECR_EP_COUNT(); 3564} 3565 3566 3567struct sctp_nets * 3568sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3569{ 3570 struct sctp_nets *net; 3571 3572 /* locate the address */ 3573 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3574 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3575 return (net); 3576 } 3577 return (NULL); 3578} 3579 3580 3581int 3582sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3583{ 3584 struct sctp_ifa *sctp_ifa; 3585 3586 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3587 if (sctp_ifa) { 3588 return (1); 3589 } else { 3590 return (0); 3591 } 3592} 3593 3594/* 3595 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3596 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3597 * stats of stuff. 3598 */ 3599int 3600sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3601 int set_scope, int from) 3602{ 3603 /* 3604 * The following is redundant to the same lines in the 3605 * sctp_aloc_assoc() but is needed since other's call the add 3606 * address function 3607 */ 3608 struct sctp_nets *net, *netfirst; 3609 int addr_inscope; 3610 3611 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3612 from); 3613 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3614 3615 netfirst = sctp_findnet(stcb, newaddr); 3616 if (netfirst) { 3617 /* 3618 * Lie and return ok, we don't want to make the association 3619 * go away for this behavior. It will happen in the TCP 3620 * model in a connected socket. It does not reach the hash 3621 * table until after the association is built so it can't be 3622 * found. Mark as reachable, since the initial creation will 3623 * have been cleared and the NOT_IN_ASSOC flag will have 3624 * been added... and we don't want to end up removing it 3625 * back out. 3626 */ 3627 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3628 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3629 SCTP_ADDR_UNCONFIRMED); 3630 } else { 3631 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3632 } 3633 3634 return (0); 3635 } 3636 addr_inscope = 1; 3637 if (newaddr->sa_family == AF_INET) { 3638 struct sockaddr_in *sin; 3639 3640 sin = (struct sockaddr_in *)newaddr; 3641 if (sin->sin_addr.s_addr == 0) { 3642 /* Invalid address */ 3643 return (-1); 3644 } 3645 /* zero out the bzero area */ 3646 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3647 3648 /* assure len is set */ 3649 sin->sin_len = sizeof(struct sockaddr_in); 3650 if (set_scope) { 3651#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3652 stcb->ipv4_local_scope = 1; 3653#else 3654 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3655 stcb->asoc.ipv4_local_scope = 1; 3656 } 3657#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3658 } else { 3659 /* Validate the address is in scope */ 3660 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3661 (stcb->asoc.ipv4_local_scope == 0)) { 3662 addr_inscope = 0; 3663 } 3664 } 3665#ifdef INET6 3666 } else if (newaddr->sa_family == AF_INET6) { 3667 struct sockaddr_in6 *sin6; 3668 3669 sin6 = (struct sockaddr_in6 *)newaddr; 3670 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3671 /* Invalid address */ 3672 return (-1); 3673 } 3674 /* assure len is set */ 3675 sin6->sin6_len = sizeof(struct sockaddr_in6); 3676 if (set_scope) { 3677 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3678 stcb->asoc.loopback_scope = 1; 3679 stcb->asoc.local_scope = 0; 3680 stcb->asoc.ipv4_local_scope = 1; 3681 stcb->asoc.site_scope = 1; 3682 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3683 /* 3684 * If the new destination is a LINK_LOCAL we 3685 * must have common site scope. Don't set 3686 * the local scope since we may not share 3687 * all links, only loopback can do this. 3688 * Links on the local network would also be 3689 * on our private network for v4 too. 3690 */ 3691 stcb->asoc.ipv4_local_scope = 1; 3692 stcb->asoc.site_scope = 1; 3693 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3694 /* 3695 * If the new destination is SITE_LOCAL then 3696 * we must have site scope in common. 3697 */ 3698 stcb->asoc.site_scope = 1; 3699 } 3700 } else { 3701 /* Validate the address is in scope */ 3702 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3703 (stcb->asoc.loopback_scope == 0)) { 3704 addr_inscope = 0; 3705 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3706 (stcb->asoc.local_scope == 0)) { 3707 addr_inscope = 0; 3708 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3709 (stcb->asoc.site_scope == 0)) { 3710 addr_inscope = 0; 3711 } 3712 } 3713#endif 3714 } else { 3715 /* not supported family type */ 3716 return (-1); 3717 } 3718 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3719 if (net == NULL) { 3720 return (-1); 3721 } 3722 SCTP_INCR_RADDR_COUNT(); 3723 bzero(net, sizeof(*net)); 3724 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3725 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3726 if (newaddr->sa_family == AF_INET) { 3727 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3728 } else if (newaddr->sa_family == AF_INET6) { 3729 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3730 } 3731 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3732 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3733 stcb->asoc.loopback_scope = 1; 3734 stcb->asoc.ipv4_local_scope = 1; 3735 stcb->asoc.local_scope = 0; 3736 stcb->asoc.site_scope = 1; 3737 addr_inscope = 1; 3738 } 3739 net->failure_threshold = stcb->asoc.def_net_failure; 3740 if (addr_inscope == 0) { 3741 net->dest_state = (SCTP_ADDR_REACHABLE | 3742 SCTP_ADDR_OUT_OF_SCOPE); 3743 } else { 3744 if (from == SCTP_ADDR_IS_CONFIRMED) 3745 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3746 net->dest_state = SCTP_ADDR_REACHABLE; 3747 else 3748 net->dest_state = SCTP_ADDR_REACHABLE | 3749 SCTP_ADDR_UNCONFIRMED; 3750 } 3751 /* 3752 * We set this to 0, the timer code knows that this means its an 3753 * initial value 3754 */ 3755 net->RTO = 0; 3756 net->RTO_measured = 0; 3757 stcb->asoc.numnets++; 3758 *(&net->ref_count) = 1; 3759 net->tos_flowlabel = 0; 3760 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 3761 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 3762 } else { 3763 net->port = 0; 3764 } 3765#ifdef INET 3766 if (newaddr->sa_family == AF_INET) 3767 net->tos_flowlabel = stcb->asoc.default_tos; 3768#endif 3769#ifdef INET6 3770 if (newaddr->sa_family == AF_INET6) 3771 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3772#endif 3773 /* Init the timer structure */ 3774 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3775 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3776 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3777 3778 /* Now generate a route for this guy */ 3779#ifdef INET6 3780 /* KAME hack: embed scopeid */ 3781 if (newaddr->sa_family == AF_INET6) { 3782 struct sockaddr_in6 *sin6; 3783 3784 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3785 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3786 sin6->sin6_scope_id = 0; 3787 } 3788#endif 3789 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3790 3791 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3792 /* Get source address */ 3793 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3794 stcb, 3795 (sctp_route_t *) & net->ro, 3796 net, 3797 0, 3798 stcb->asoc.vrf_id); 3799 /* Now get the interface MTU */ 3800 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3801 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3802 } else { 3803 net->mtu = 0; 3804 } 3805#ifdef SCTP_PRINT_FOR_B_AND_M 3806 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu); 3807#endif 3808 if (net->mtu == 0) { 3809 /* Huh ?? */ 3810 net->mtu = SCTP_DEFAULT_MTU; 3811 } else { 3812 uint32_t rmtu; 3813 3814 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3815#ifdef SCTP_PRINT_FOR_B_AND_M 3816 SCTP_PRINTF("The route mtu is %d\n", rmtu); 3817#endif 3818 if (rmtu == 0) { 3819 /* 3820 * Start things off to match mtu of 3821 * interface please. 3822 */ 3823 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3824 net->ro.ro_rt, net->mtu); 3825 } else { 3826 /* 3827 * we take the route mtu over the interface, 3828 * since the route may be leading out the 3829 * loopback, or a different interface. 3830 */ 3831 net->mtu = rmtu; 3832 } 3833 } 3834 if (from == SCTP_ALLOC_ASOC) { 3835#ifdef SCTP_PRINT_FOR_B_AND_M 3836 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu); 3837#endif 3838 stcb->asoc.smallest_mtu = net->mtu; 3839 } 3840 } else { 3841 net->mtu = stcb->asoc.smallest_mtu; 3842 } 3843#ifdef INET6 3844 if (newaddr->sa_family == AF_INET6) { 3845 struct sockaddr_in6 *sin6; 3846 3847 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3848 (void)sa6_recoverscope(sin6); 3849 } 3850#endif 3851 if (net->port) { 3852 net->mtu -= sizeof(struct udphdr); 3853 } 3854 if (stcb->asoc.smallest_mtu > net->mtu) { 3855#ifdef SCTP_PRINT_FOR_B_AND_M 3856 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n", 3857 net->mtu, stcb->asoc.smallest_mtu); 3858#endif 3859 stcb->asoc.smallest_mtu = net->mtu; 3860 } 3861 /* JRS - Use the congestion control given in the CC module */ 3862 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 3863 3864 /* 3865 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3866 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3867 */ 3868 net->find_pseudo_cumack = 1; 3869 net->find_rtx_pseudo_cumack = 1; 3870 net->src_addr_selected = 0; 3871 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3872 if (net->ro.ro_rt == NULL) { 3873 /* Since we have no route put it at the back */ 3874 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3875 } else if (netfirst == NULL) { 3876 /* We are the first one in the pool. */ 3877 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3878 } else if (netfirst->ro.ro_rt == NULL) { 3879 /* 3880 * First one has NO route. Place this one ahead of the first 3881 * one. 3882 */ 3883 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3884 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3885 /* 3886 * This one has a different interface than the one at the 3887 * top of the list. Place it ahead. 3888 */ 3889 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3890 } else { 3891 /* 3892 * Ok we have the same interface as the first one. Move 3893 * forward until we find either a) one with a NULL route... 3894 * insert ahead of that b) one with a different ifp.. insert 3895 * after that. c) end of the list.. insert at the tail. 3896 */ 3897 struct sctp_nets *netlook; 3898 3899 do { 3900 netlook = TAILQ_NEXT(netfirst, sctp_next); 3901 if (netlook == NULL) { 3902 /* End of the list */ 3903 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3904 break; 3905 } else if (netlook->ro.ro_rt == NULL) { 3906 /* next one has NO route */ 3907 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 3908 break; 3909 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 3910 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 3911 net, sctp_next); 3912 break; 3913 } 3914 /* Shift forward */ 3915 netfirst = netlook; 3916 } while (netlook != NULL); 3917 } 3918 3919 /* got to have a primary set */ 3920 if (stcb->asoc.primary_destination == 0) { 3921 stcb->asoc.primary_destination = net; 3922 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 3923 (net->ro.ro_rt) && 3924 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 3925 /* No route to current primary adopt new primary */ 3926 stcb->asoc.primary_destination = net; 3927 } 3928 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 3929 net); 3930 /* Validate primary is first */ 3931 net = TAILQ_FIRST(&stcb->asoc.nets); 3932 if ((net != stcb->asoc.primary_destination) && 3933 (stcb->asoc.primary_destination)) { 3934 /* 3935 * first one on the list is NOT the primary sctp_cmpaddr() 3936 * is much more efficent if the primary is the first on the 3937 * list, make it so. 3938 */ 3939 TAILQ_REMOVE(&stcb->asoc.nets, 3940 stcb->asoc.primary_destination, sctp_next); 3941 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 3942 stcb->asoc.primary_destination, sctp_next); 3943 } 3944 return (0); 3945} 3946 3947 3948static uint32_t 3949sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 3950{ 3951 uint32_t id; 3952 struct sctpasochead *head; 3953 struct sctp_tcb *lstcb; 3954 3955 SCTP_INP_WLOCK(inp); 3956try_again: 3957 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3958 /* TSNH */ 3959 SCTP_INP_WUNLOCK(inp); 3960 return (0); 3961 } 3962 /* 3963 * We don't allow assoc id to be 0, this is needed otherwise if the 3964 * id were to wrap we would have issues with some socket options. 3965 */ 3966 if (inp->sctp_associd_counter == 0) { 3967 inp->sctp_associd_counter++; 3968 } 3969 id = inp->sctp_associd_counter; 3970 inp->sctp_associd_counter++; 3971 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 3972 if (lstcb) { 3973 goto try_again; 3974 } 3975 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 3976 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 3977 stcb->asoc.in_asocid_hash = 1; 3978 SCTP_INP_WUNLOCK(inp); 3979 return id; 3980} 3981 3982/* 3983 * allocate an association and add it to the endpoint. The caller must be 3984 * careful to add all additional addresses once they are know right away or 3985 * else the assoc will be may experience a blackout scenario. 3986 */ 3987struct sctp_tcb * 3988sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 3989 int *error, uint32_t override_tag, uint32_t vrf_id, 3990 struct thread *p 3991) 3992{ 3993 /* note the p argument is only valid in unbound sockets */ 3994 3995 struct sctp_tcb *stcb; 3996 struct sctp_association *asoc; 3997 struct sctpasochead *head; 3998 uint16_t rport; 3999 int err; 4000 4001 /* 4002 * Assumption made here: Caller has done a 4003 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4004 * address does not exist already. 4005 */ 4006 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4007 /* Hit max assoc, sorry no more */ 4008 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4009 *error = ENOBUFS; 4010 return (NULL); 4011 } 4012 if (firstaddr == NULL) { 4013 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4014 *error = EINVAL; 4015 return (NULL); 4016 } 4017 SCTP_INP_RLOCK(inp); 4018 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4019 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4020 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4021 /* 4022 * If its in the TCP pool, its NOT allowed to create an 4023 * association. The parent listener needs to call 4024 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4025 * off, or connected one does this.. its an error. 4026 */ 4027 SCTP_INP_RUNLOCK(inp); 4028 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4029 *error = EINVAL; 4030 return (NULL); 4031 } 4032 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4033#ifdef SCTP_DEBUG 4034 if (firstaddr) { 4035 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4036 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4037 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4038 } else { 4039 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4040 } 4041#endif /* SCTP_DEBUG */ 4042 if (firstaddr->sa_family == AF_INET) { 4043 struct sockaddr_in *sin; 4044 4045 sin = (struct sockaddr_in *)firstaddr; 4046 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 4047 /* Invalid address */ 4048 SCTP_INP_RUNLOCK(inp); 4049 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4050 *error = EINVAL; 4051 return (NULL); 4052 } 4053 rport = sin->sin_port; 4054 } else if (firstaddr->sa_family == AF_INET6) { 4055 struct sockaddr_in6 *sin6; 4056 4057 sin6 = (struct sockaddr_in6 *)firstaddr; 4058 if ((sin6->sin6_port == 0) || 4059 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 4060 /* Invalid address */ 4061 SCTP_INP_RUNLOCK(inp); 4062 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4063 *error = EINVAL; 4064 return (NULL); 4065 } 4066 rport = sin6->sin6_port; 4067 } else { 4068 /* not supported family type */ 4069 SCTP_INP_RUNLOCK(inp); 4070 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4071 *error = EINVAL; 4072 return (NULL); 4073 } 4074 SCTP_INP_RUNLOCK(inp); 4075 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4076 /* 4077 * If you have not performed a bind, then we need to do the 4078 * ephemerial bind for you. 4079 */ 4080 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4081 (struct sockaddr *)NULL, 4082 (struct sctp_ifa *)NULL, 4083 p 4084 ))) { 4085 /* bind error, probably perm */ 4086 *error = err; 4087 return (NULL); 4088 } 4089 } 4090 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4091 if (stcb == NULL) { 4092 /* out of memory? */ 4093 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4094 *error = ENOMEM; 4095 return (NULL); 4096 } 4097 SCTP_INCR_ASOC_COUNT(); 4098 4099 bzero(stcb, sizeof(*stcb)); 4100 asoc = &stcb->asoc; 4101 4102 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4103 SCTP_TCB_LOCK_INIT(stcb); 4104 SCTP_TCB_SEND_LOCK_INIT(stcb); 4105 stcb->rport = rport; 4106 /* setup back pointer's */ 4107 stcb->sctp_ep = inp; 4108 stcb->sctp_socket = inp->sctp_socket; 4109 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4110 /* failed */ 4111 SCTP_TCB_LOCK_DESTROY(stcb); 4112 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4113 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4114 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4115 SCTP_DECR_ASOC_COUNT(); 4116 *error = err; 4117 return (NULL); 4118 } 4119 /* and the port */ 4120 SCTP_INP_INFO_WLOCK(); 4121 SCTP_INP_WLOCK(inp); 4122 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4123 /* inpcb freed while alloc going on */ 4124 SCTP_TCB_LOCK_DESTROY(stcb); 4125 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4126 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4127 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4128 SCTP_INP_WUNLOCK(inp); 4129 SCTP_INP_INFO_WUNLOCK(); 4130 SCTP_DECR_ASOC_COUNT(); 4131 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4132 *error = EINVAL; 4133 return (NULL); 4134 } 4135 SCTP_TCB_LOCK(stcb); 4136 4137 /* now that my_vtag is set, add it to the hash */ 4138 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4139 /* put it in the bucket in the vtag hash of assoc's for the system */ 4140 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4141 SCTP_INP_INFO_WUNLOCK(); 4142 4143 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4144 /* failure.. memory error? */ 4145 if (asoc->strmout) { 4146 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4147 asoc->strmout = NULL; 4148 } 4149 if (asoc->mapping_array) { 4150 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4151 asoc->mapping_array = NULL; 4152 } 4153 if (asoc->nr_mapping_array) { 4154 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4155 asoc->nr_mapping_array = NULL; 4156 } 4157 SCTP_DECR_ASOC_COUNT(); 4158 SCTP_TCB_LOCK_DESTROY(stcb); 4159 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4160 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4161 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4162 SCTP_INP_WUNLOCK(inp); 4163 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4164 *error = ENOBUFS; 4165 return (NULL); 4166 } 4167 /* Init all the timers */ 4168 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 4169 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4170 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4171 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4172 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4173 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4174 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4175 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4176 4177 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4178 /* now file the port under the hash as well */ 4179 if (inp->sctp_tcbhash != NULL) { 4180 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4181 inp->sctp_hashmark)]; 4182 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4183 } 4184 SCTP_INP_WUNLOCK(inp); 4185 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4186 return (stcb); 4187} 4188 4189 4190void 4191sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4192{ 4193 struct sctp_association *asoc; 4194 4195 asoc = &stcb->asoc; 4196 asoc->numnets--; 4197 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4198 if (net == asoc->primary_destination) { 4199 /* Reset primary */ 4200 struct sctp_nets *lnet; 4201 4202 lnet = TAILQ_FIRST(&asoc->nets); 4203 /* 4204 * Mobility adaptation Ideally, if deleted destination is 4205 * the primary, it becomes a fast retransmission trigger by 4206 * the subsequent SET PRIMARY. (by micchie) 4207 */ 4208 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4209 SCTP_MOBILITY_BASE) || 4210 sctp_is_mobility_feature_on(stcb->sctp_ep, 4211 SCTP_MOBILITY_FASTHANDOFF)) { 4212 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4213 if (asoc->deleted_primary != NULL) { 4214 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4215 goto out; 4216 } 4217 asoc->deleted_primary = net; 4218 atomic_add_int(&net->ref_count, 1); 4219 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4220 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4221 sctp_mobility_feature_on(stcb->sctp_ep, 4222 SCTP_MOBILITY_PRIM_DELETED); 4223 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4224 stcb->sctp_ep, stcb, NULL); 4225 } 4226out: 4227 /* Try to find a confirmed primary */ 4228 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4229 } 4230 if (net == asoc->last_data_chunk_from) { 4231 /* Reset primary */ 4232 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4233 } 4234 if (net == asoc->last_control_chunk_from) { 4235 /* Clear net */ 4236 asoc->last_control_chunk_from = NULL; 4237 } 4238 sctp_free_remote_addr(net); 4239} 4240 4241/* 4242 * remove a remote endpoint address from an association, it will fail if the 4243 * address does not exist. 4244 */ 4245int 4246sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4247{ 4248 /* 4249 * Here we need to remove a remote address. This is quite simple, we 4250 * first find it in the list of address for the association 4251 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4252 * on that item. Note we do not allow it to be removed if there are 4253 * no other addresses. 4254 */ 4255 struct sctp_association *asoc; 4256 struct sctp_nets *net, *net_tmp; 4257 4258 asoc = &stcb->asoc; 4259 4260 /* locate the address */ 4261 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { 4262 net_tmp = TAILQ_NEXT(net, sctp_next); 4263 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4264 continue; 4265 } 4266 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4267 remaddr)) { 4268 /* we found the guy */ 4269 if (asoc->numnets < 2) { 4270 /* Must have at LEAST two remote addresses */ 4271 return (-1); 4272 } else { 4273 sctp_remove_net(stcb, net); 4274 return (0); 4275 } 4276 } 4277 } 4278 /* not found. */ 4279 return (-2); 4280} 4281 4282void 4283sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4284{ 4285 struct sctpvtaghead *chain; 4286 struct sctp_tagblock *twait_block; 4287 int found = 0; 4288 int i; 4289 4290 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4291 if (!LIST_EMPTY(chain)) { 4292 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4293 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4294 if ((twait_block->vtag_block[i].v_tag == tag) && 4295 (twait_block->vtag_block[i].lport == lport) && 4296 (twait_block->vtag_block[i].rport == rport)) { 4297 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4298 twait_block->vtag_block[i].v_tag = 0; 4299 twait_block->vtag_block[i].lport = 0; 4300 twait_block->vtag_block[i].rport = 0; 4301 found = 1; 4302 break; 4303 } 4304 } 4305 if (found) 4306 break; 4307 } 4308 } 4309} 4310 4311int 4312sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4313{ 4314 struct sctpvtaghead *chain; 4315 struct sctp_tagblock *twait_block; 4316 int found = 0; 4317 int i; 4318 4319 SCTP_INP_INFO_WLOCK(); 4320 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4321 if (!LIST_EMPTY(chain)) { 4322 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4323 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4324 if ((twait_block->vtag_block[i].v_tag == tag) && 4325 (twait_block->vtag_block[i].lport == lport) && 4326 (twait_block->vtag_block[i].rport == rport)) { 4327 found = 1; 4328 break; 4329 } 4330 } 4331 if (found) 4332 break; 4333 } 4334 } 4335 SCTP_INP_INFO_WUNLOCK(); 4336 return (found); 4337} 4338 4339 4340void 4341sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4342{ 4343 struct sctpvtaghead *chain; 4344 struct sctp_tagblock *twait_block; 4345 struct timeval now; 4346 int set, i; 4347 4348 if (time == 0) { 4349 /* Its disabled */ 4350 return; 4351 } 4352 (void)SCTP_GETTIME_TIMEVAL(&now); 4353 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4354 set = 0; 4355 if (!LIST_EMPTY(chain)) { 4356 /* Block(s) present, lets find space, and expire on the fly */ 4357 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4358 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4359 if ((twait_block->vtag_block[i].v_tag == 0) && 4360 !set) { 4361 twait_block->vtag_block[i].tv_sec_at_expire = 4362 now.tv_sec + time; 4363 twait_block->vtag_block[i].v_tag = tag; 4364 twait_block->vtag_block[i].lport = lport; 4365 twait_block->vtag_block[i].rport = rport; 4366 set = 1; 4367 } else if ((twait_block->vtag_block[i].v_tag) && 4368 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4369 /* Audit expires this guy */ 4370 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4371 twait_block->vtag_block[i].v_tag = 0; 4372 twait_block->vtag_block[i].lport = 0; 4373 twait_block->vtag_block[i].rport = 0; 4374 if (set == 0) { 4375 /* Reuse it for my new tag */ 4376 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4377 twait_block->vtag_block[i].v_tag = tag; 4378 twait_block->vtag_block[i].lport = lport; 4379 twait_block->vtag_block[i].rport = rport; 4380 set = 1; 4381 } 4382 } 4383 } 4384 if (set) { 4385 /* 4386 * We only do up to the block where we can 4387 * place our tag for audits 4388 */ 4389 break; 4390 } 4391 } 4392 } 4393 /* Need to add a new block to chain */ 4394 if (!set) { 4395 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4396 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4397 if (twait_block == NULL) { 4398#ifdef INVARIANTS 4399 panic("Can not alloc tagblock"); 4400#endif 4401 return; 4402 } 4403 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4404 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4405 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4406 twait_block->vtag_block[0].v_tag = tag; 4407 twait_block->vtag_block[0].lport = lport; 4408 twait_block->vtag_block[0].rport = rport; 4409 } 4410} 4411 4412 4413static void 4414sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4415{ 4416 struct sctp_iterator *it; 4417 4418 /* 4419 * Unlock the tcb lock we do this so we avoid a dead lock scenario 4420 * where the iterator is waiting on the TCB lock and the TCB lock is 4421 * waiting on the iterator lock. 4422 */ 4423 it = stcb->asoc.stcb_starting_point_for_iterator; 4424 if (it == NULL) { 4425 return; 4426 } 4427 if (it->inp != stcb->sctp_ep) { 4428 /* hmm, focused on the wrong one? */ 4429 return; 4430 } 4431 if (it->stcb != stcb) { 4432 return; 4433 } 4434 it->stcb = LIST_NEXT(stcb, sctp_tcblist); 4435 if (it->stcb == NULL) { 4436 /* done with all asoc's in this assoc */ 4437 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 4438 it->inp = NULL; 4439 } else { 4440 it->inp = LIST_NEXT(inp, sctp_list); 4441 } 4442 } 4443} 4444 4445 4446/*- 4447 * Free the association after un-hashing the remote port. This 4448 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4449 * expect that the input to this function IS a locked TCB. 4450 * It will return 0, if it did NOT destroy the association (instead 4451 * it unlocks it. It will return NON-zero if it either destroyed the 4452 * association OR the association is already destroyed. 4453 */ 4454int 4455sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4456{ 4457 int i; 4458 struct sctp_association *asoc; 4459 struct sctp_nets *net, *prev; 4460 struct sctp_laddr *laddr; 4461 struct sctp_tmit_chunk *chk; 4462 struct sctp_asconf_addr *aparam; 4463 struct sctp_asconf_ack *aack; 4464 struct sctp_stream_reset_list *liste; 4465 struct sctp_queued_to_read *sq; 4466 struct sctp_stream_queue_pending *sp; 4467 sctp_sharedkey_t *shared_key; 4468 struct socket *so; 4469 int ccnt = 0; 4470 int cnt = 0; 4471 4472 /* first, lets purge the entry from the hash table. */ 4473 4474#ifdef SCTP_LOG_CLOSING 4475 sctp_log_closing(inp, stcb, 6); 4476#endif 4477 if (stcb->asoc.state == 0) { 4478#ifdef SCTP_LOG_CLOSING 4479 sctp_log_closing(inp, NULL, 7); 4480#endif 4481 /* there is no asoc, really TSNH :-0 */ 4482 return (1); 4483 } 4484 /* TEMP CODE */ 4485 if (stcb->freed_from_where == 0) { 4486 /* Only record the first place free happened from */ 4487 stcb->freed_from_where = from_location; 4488 } 4489 /* TEMP CODE */ 4490 4491 asoc = &stcb->asoc; 4492 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4493 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4494 /* nothing around */ 4495 so = NULL; 4496 else 4497 so = inp->sctp_socket; 4498 4499 /* 4500 * We used timer based freeing if a reader or writer is in the way. 4501 * So we first check if we are actually being called from a timer, 4502 * if so we abort early if a reader or writer is still in the way. 4503 */ 4504 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4505 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4506 /* 4507 * is it the timer driving us? if so are the reader/writers 4508 * gone? 4509 */ 4510 if (stcb->asoc.refcnt) { 4511 /* nope, reader or writer in the way */ 4512 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4513 /* no asoc destroyed */ 4514 SCTP_TCB_UNLOCK(stcb); 4515#ifdef SCTP_LOG_CLOSING 4516 sctp_log_closing(inp, stcb, 8); 4517#endif 4518 return (0); 4519 } 4520 } 4521 /* now clean up any other timers */ 4522 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4523 asoc->hb_timer.self = NULL; 4524 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4525 asoc->dack_timer.self = NULL; 4526 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4527 /*- 4528 * For stream reset we don't blast this unless 4529 * it is a str-reset timer, it might be the 4530 * free-asoc timer which we DON'T want to 4531 * disturb. 4532 */ 4533 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4534 asoc->strreset_timer.self = NULL; 4535 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4536 asoc->asconf_timer.self = NULL; 4537 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4538 asoc->autoclose_timer.self = NULL; 4539 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4540 asoc->shut_guard_timer.self = NULL; 4541 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4542 asoc->delayed_event_timer.self = NULL; 4543 /* Mobility adaptation */ 4544 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4545 asoc->delete_prim_timer.self = NULL; 4546 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4547 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4548 net->fr_timer.self = NULL; 4549 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4550 net->rxt_timer.self = NULL; 4551 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4552 net->pmtu_timer.self = NULL; 4553 } 4554 /* Now the read queue needs to be cleaned up (only once) */ 4555 cnt = 0; 4556 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4557 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4558 SCTP_INP_READ_LOCK(inp); 4559 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4560 if (sq->stcb == stcb) { 4561 sq->do_not_ref_stcb = 1; 4562 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4563 /* 4564 * If there is no end, there never will be 4565 * now. 4566 */ 4567 if (sq->end_added == 0) { 4568 /* Held for PD-API clear that. */ 4569 sq->pdapi_aborted = 1; 4570 sq->held_length = 0; 4571 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4572 /* 4573 * Need to add a PD-API 4574 * aborted indication. 4575 * Setting the control_pdapi 4576 * assures that it will be 4577 * added right after this 4578 * msg. 4579 */ 4580 uint32_t strseq; 4581 4582 stcb->asoc.control_pdapi = sq; 4583 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4584 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4585 stcb, 4586 SCTP_PARTIAL_DELIVERY_ABORTED, 4587 (void *)&strseq, 4588 SCTP_SO_LOCKED); 4589 stcb->asoc.control_pdapi = NULL; 4590 } 4591 } 4592 /* Add an end to wake them */ 4593 sq->end_added = 1; 4594 cnt++; 4595 } 4596 } 4597 SCTP_INP_READ_UNLOCK(inp); 4598 if (stcb->block_entry) { 4599 cnt++; 4600 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4601 stcb->block_entry->error = ECONNRESET; 4602 stcb->block_entry = NULL; 4603 } 4604 } 4605 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4606 /* 4607 * Someone holds a reference OR the socket is unaccepted 4608 * yet. 4609 */ 4610 if ((stcb->asoc.refcnt) || 4611 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4612 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4613 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4614 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4615 } 4616 SCTP_TCB_UNLOCK(stcb); 4617 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4618 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4619 /* nothing around */ 4620 so = NULL; 4621 if (so) { 4622 /* Wake any reader/writers */ 4623 sctp_sorwakeup(inp, so); 4624 sctp_sowwakeup(inp, so); 4625 } 4626#ifdef SCTP_LOG_CLOSING 4627 sctp_log_closing(inp, stcb, 9); 4628#endif 4629 /* no asoc destroyed */ 4630 return (0); 4631 } 4632#ifdef SCTP_LOG_CLOSING 4633 sctp_log_closing(inp, stcb, 10); 4634#endif 4635 /* 4636 * When I reach here, no others want to kill the assoc yet.. and I 4637 * own the lock. Now its possible an abort comes in when I do the 4638 * lock exchange below to grab all the locks to do the final take 4639 * out. to prevent this we increment the count, which will start a 4640 * timer and blow out above thus assuring us that we hold exclusive 4641 * killing of the asoc. Note that after getting back the TCB lock we 4642 * will go ahead and increment the counter back up and stop any 4643 * timer a passing stranger may have started :-S 4644 */ 4645 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4646 atomic_add_int(&stcb->asoc.refcnt, 1); 4647 4648 SCTP_TCB_UNLOCK(stcb); 4649 4650 SCTP_ITERATOR_LOCK(); 4651 SCTP_INP_INFO_WLOCK(); 4652 SCTP_INP_WLOCK(inp); 4653 SCTP_TCB_LOCK(stcb); 4654 } 4655 /* Double check the GONE flag */ 4656 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4657 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4658 /* nothing around */ 4659 so = NULL; 4660 4661 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4662 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4663 /* 4664 * For TCP type we need special handling when we are 4665 * connected. We also include the peel'ed off ones to. 4666 */ 4667 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4668 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4669 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4670 if (so) { 4671 SOCK_LOCK(so); 4672 if (so->so_rcv.sb_cc == 0) { 4673 so->so_state &= ~(SS_ISCONNECTING | 4674 SS_ISDISCONNECTING | 4675 SS_ISCONFIRMING | 4676 SS_ISCONNECTED); 4677 } 4678 socantrcvmore_locked(so); 4679 SOCK_UNLOCK(so); 4680 sctp_sowwakeup(inp, so); 4681 sctp_sorwakeup(inp, so); 4682 SCTP_SOWAKEUP(so); 4683 } 4684 } 4685 } 4686 /* 4687 * Make it invalid too, that way if its about to run it will abort 4688 * and return. 4689 */ 4690 sctp_iterator_asoc_being_freed(inp, stcb); 4691 /* re-increment the lock */ 4692 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4693 atomic_add_int(&stcb->asoc.refcnt, -1); 4694 } 4695 asoc->state = 0; 4696 if (inp->sctp_tcbhash) { 4697 LIST_REMOVE(stcb, sctp_tcbhash); 4698 } 4699 if (stcb->asoc.in_asocid_hash) { 4700 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4701 } 4702 /* Now lets remove it from the list of ALL associations in the EP */ 4703 LIST_REMOVE(stcb, sctp_tcblist); 4704 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4705 SCTP_INP_INCR_REF(inp); 4706 SCTP_INP_WUNLOCK(inp); 4707 SCTP_ITERATOR_UNLOCK(); 4708 } 4709 /* pull from vtag hash */ 4710 LIST_REMOVE(stcb, sctp_asocs); 4711 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4712 inp->sctp_lport, stcb->rport); 4713 4714 /* 4715 * Now restop the timers to be sure this is paranoia at is finest! 4716 */ 4717 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4718 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4719 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4720 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4721 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4722 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4723 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4724 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4725 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4726 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4727 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4728 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4729 } 4730 4731 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4732 prev = NULL; 4733 /* 4734 * The chunk lists and such SHOULD be empty but we check them just 4735 * in case. 4736 */ 4737 /* anything on the wheel needs to be removed */ 4738 for (i = 0; i < asoc->streamoutcnt; i++) { 4739 struct sctp_stream_out *outs; 4740 4741 outs = &asoc->strmout[i]; 4742 /* now clean up any chunks here */ 4743 sp = TAILQ_FIRST(&outs->outqueue); 4744 while (sp) { 4745 TAILQ_REMOVE(&outs->outqueue, sp, next); 4746 if (sp->data) { 4747 sctp_m_freem(sp->data); 4748 sp->data = NULL; 4749 sp->tail_mbuf = NULL; 4750 } 4751 sctp_free_remote_addr(sp->net); 4752 sctp_free_spbufspace(stcb, asoc, sp); 4753 if (sp->holds_key_ref) 4754 sctp_auth_key_release(stcb, sp->auth_keyid); 4755 /* Free the zone stuff */ 4756 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 4757 SCTP_DECR_STRMOQ_COUNT(); 4758 /* sa_ignore FREED_MEMORY */ 4759 sp = TAILQ_FIRST(&outs->outqueue); 4760 } 4761 } 4762 4763 /* sa_ignore FREED_MEMORY */ 4764 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { 4765 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); 4766 SCTP_FREE(liste, SCTP_M_STRESET); 4767 } 4768 4769 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 4770 while (sq) { 4771 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4772 if (sq->data) { 4773 sctp_m_freem(sq->data); 4774 sq->data = NULL; 4775 } 4776 sctp_free_remote_addr(sq->whoFrom); 4777 sq->whoFrom = NULL; 4778 sq->stcb = NULL; 4779 /* Free the ctl entry */ 4780 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4781 SCTP_DECR_READQ_COUNT(); 4782 /* sa_ignore FREED_MEMORY */ 4783 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 4784 } 4785 4786 chk = TAILQ_FIRST(&asoc->free_chunks); 4787 while (chk) { 4788 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4789 if (chk->data) { 4790 sctp_m_freem(chk->data); 4791 chk->data = NULL; 4792 } 4793 if (chk->holds_key_ref) 4794 sctp_auth_key_release(stcb, chk->auth_keyid); 4795 ccnt++; 4796 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4797 SCTP_DECR_CHK_COUNT(); 4798 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4799 asoc->free_chunk_cnt--; 4800 /* sa_ignore FREED_MEMORY */ 4801 chk = TAILQ_FIRST(&asoc->free_chunks); 4802 } 4803 /* pending send queue SHOULD be empty */ 4804 if (!TAILQ_EMPTY(&asoc->send_queue)) { 4805 chk = TAILQ_FIRST(&asoc->send_queue); 4806 while (chk) { 4807 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4808 if (chk->data) { 4809 sctp_m_freem(chk->data); 4810 chk->data = NULL; 4811 } 4812 if (chk->holds_key_ref) 4813 sctp_auth_key_release(stcb, chk->auth_keyid); 4814 ccnt++; 4815 sctp_free_remote_addr(chk->whoTo); 4816 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4817 SCTP_DECR_CHK_COUNT(); 4818 /* sa_ignore FREED_MEMORY */ 4819 chk = TAILQ_FIRST(&asoc->send_queue); 4820 } 4821 } 4822/* 4823 if (ccnt) { 4824 printf("Freed %d from send_queue\n", ccnt); 4825 ccnt = 0; 4826 } 4827*/ 4828 /* sent queue SHOULD be empty */ 4829 if (!TAILQ_EMPTY(&asoc->sent_queue)) { 4830 chk = TAILQ_FIRST(&asoc->sent_queue); 4831 while (chk) { 4832 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4833 if (chk->data) { 4834 sctp_m_freem(chk->data); 4835 chk->data = NULL; 4836 } 4837 if (chk->holds_key_ref) 4838 sctp_auth_key_release(stcb, chk->auth_keyid); 4839 ccnt++; 4840 sctp_free_remote_addr(chk->whoTo); 4841 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4842 SCTP_DECR_CHK_COUNT(); 4843 /* sa_ignore FREED_MEMORY */ 4844 chk = TAILQ_FIRST(&asoc->sent_queue); 4845 } 4846 } 4847/* 4848 if (ccnt) { 4849 printf("Freed %d from sent_queue\n", ccnt); 4850 ccnt = 0; 4851 } 4852*/ 4853 /* control queue MAY not be empty */ 4854 if (!TAILQ_EMPTY(&asoc->control_send_queue)) { 4855 chk = TAILQ_FIRST(&asoc->control_send_queue); 4856 while (chk) { 4857 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4858 if (chk->data) { 4859 sctp_m_freem(chk->data); 4860 chk->data = NULL; 4861 } 4862 if (chk->holds_key_ref) 4863 sctp_auth_key_release(stcb, chk->auth_keyid); 4864 ccnt++; 4865 sctp_free_remote_addr(chk->whoTo); 4866 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4867 SCTP_DECR_CHK_COUNT(); 4868 /* sa_ignore FREED_MEMORY */ 4869 chk = TAILQ_FIRST(&asoc->control_send_queue); 4870 } 4871 } 4872/* 4873 if (ccnt) { 4874 printf("Freed %d from ctrl_queue\n", ccnt); 4875 ccnt = 0; 4876 } 4877*/ 4878 4879 /* ASCONF queue MAY not be empty */ 4880 if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) { 4881 chk = TAILQ_FIRST(&asoc->asconf_send_queue); 4882 while (chk) { 4883 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4884 if (chk->data) { 4885 sctp_m_freem(chk->data); 4886 chk->data = NULL; 4887 } 4888 if (chk->holds_key_ref) 4889 sctp_auth_key_release(stcb, chk->auth_keyid); 4890 ccnt++; 4891 sctp_free_remote_addr(chk->whoTo); 4892 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4893 SCTP_DECR_CHK_COUNT(); 4894 /* sa_ignore FREED_MEMORY */ 4895 chk = TAILQ_FIRST(&asoc->asconf_send_queue); 4896 } 4897 } 4898/* 4899 if (ccnt) { 4900 printf("Freed %d from asconf_queue\n", ccnt); 4901 ccnt = 0; 4902 } 4903*/ 4904 if (!TAILQ_EMPTY(&asoc->reasmqueue)) { 4905 chk = TAILQ_FIRST(&asoc->reasmqueue); 4906 while (chk) { 4907 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4908 if (chk->data) { 4909 sctp_m_freem(chk->data); 4910 chk->data = NULL; 4911 } 4912 if (chk->holds_key_ref) 4913 sctp_auth_key_release(stcb, chk->auth_keyid); 4914 sctp_free_remote_addr(chk->whoTo); 4915 ccnt++; 4916 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4917 SCTP_DECR_CHK_COUNT(); 4918 /* sa_ignore FREED_MEMORY */ 4919 chk = TAILQ_FIRST(&asoc->reasmqueue); 4920 } 4921 } 4922/* 4923 if (ccnt) { 4924 printf("Freed %d from reasm_queue\n", ccnt); 4925 ccnt = 0; 4926 } 4927*/ 4928 if (asoc->mapping_array) { 4929 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4930 asoc->mapping_array = NULL; 4931 } 4932 if (asoc->nr_mapping_array) { 4933 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4934 asoc->nr_mapping_array = NULL; 4935 } 4936 /* the stream outs */ 4937 if (asoc->strmout) { 4938 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4939 asoc->strmout = NULL; 4940 } 4941 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 4942 if (asoc->strmin) { 4943 struct sctp_queued_to_read *ctl; 4944 4945 for (i = 0; i < asoc->streamincnt; i++) { 4946 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { 4947 /* We have somethings on the streamin queue */ 4948 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4949 while (ctl) { 4950 TAILQ_REMOVE(&asoc->strmin[i].inqueue, 4951 ctl, next); 4952 sctp_free_remote_addr(ctl->whoFrom); 4953 if (ctl->data) { 4954 sctp_m_freem(ctl->data); 4955 ctl->data = NULL; 4956 } 4957 /* 4958 * We don't free the address here 4959 * since all the net's were freed 4960 * above. 4961 */ 4962 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 4963 SCTP_DECR_READQ_COUNT(); 4964 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4965 } 4966 } 4967 } 4968 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4969 asoc->strmin = NULL; 4970 } 4971 asoc->streamincnt = 0; 4972 while (!TAILQ_EMPTY(&asoc->nets)) { 4973 /* sa_ignore FREED_MEMORY */ 4974 net = TAILQ_FIRST(&asoc->nets); 4975 /* pull from list */ 4976 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) { 4977#ifdef INVARIANTS 4978 panic("no net's left alloc'ed, or list points to itself"); 4979#endif 4980 break; 4981 } 4982 prev = net; 4983 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4984 sctp_free_remote_addr(net); 4985 } 4986 4987 while (!LIST_EMPTY(&asoc->sctp_restricted_addrs)) { 4988 /* sa_ignore FREED_MEMORY */ 4989 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); 4990 sctp_remove_laddr(laddr); 4991 } 4992 4993 /* pending asconf (address) parameters */ 4994 while (!TAILQ_EMPTY(&asoc->asconf_queue)) { 4995 /* sa_ignore FREED_MEMORY */ 4996 aparam = TAILQ_FIRST(&asoc->asconf_queue); 4997 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 4998 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 4999 } 5000 while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) { 5001 /* sa_ignore FREED_MEMORY */ 5002 aack = TAILQ_FIRST(&asoc->asconf_ack_sent); 5003 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5004 if (aack->data != NULL) { 5005 sctp_m_freem(aack->data); 5006 } 5007 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5008 } 5009 /* clean up auth stuff */ 5010 if (asoc->local_hmacs) 5011 sctp_free_hmaclist(asoc->local_hmacs); 5012 if (asoc->peer_hmacs) 5013 sctp_free_hmaclist(asoc->peer_hmacs); 5014 5015 if (asoc->local_auth_chunks) 5016 sctp_free_chunklist(asoc->local_auth_chunks); 5017 if (asoc->peer_auth_chunks) 5018 sctp_free_chunklist(asoc->peer_auth_chunks); 5019 5020 sctp_free_authinfo(&asoc->authinfo); 5021 5022 shared_key = LIST_FIRST(&asoc->shared_keys); 5023 while (shared_key) { 5024 LIST_REMOVE(shared_key, next); 5025 sctp_free_sharedkey(shared_key); 5026 /* sa_ignore FREED_MEMORY */ 5027 shared_key = LIST_FIRST(&asoc->shared_keys); 5028 } 5029 5030 /* Insert new items here :> */ 5031 5032 /* Get rid of LOCK */ 5033 SCTP_TCB_LOCK_DESTROY(stcb); 5034 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5035 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5036 SCTP_INP_INFO_WUNLOCK(); 5037 SCTP_INP_RLOCK(inp); 5038 } 5039#ifdef SCTP_TRACK_FREED_ASOCS 5040 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5041 /* now clean up the tasoc itself */ 5042 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5043 SCTP_DECR_ASOC_COUNT(); 5044 } else { 5045 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5046 } 5047#else 5048 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5049 SCTP_DECR_ASOC_COUNT(); 5050#endif 5051 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5052 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5053 /* 5054 * If its NOT the inp_free calling us AND sctp_close 5055 * as been called, we call back... 5056 */ 5057 SCTP_INP_RUNLOCK(inp); 5058 /* 5059 * This will start the kill timer (if we are the 5060 * lastone) since we hold an increment yet. But this 5061 * is the only safe way to do this since otherwise 5062 * if the socket closes at the same time we are here 5063 * we might collide in the cleanup. 5064 */ 5065 sctp_inpcb_free(inp, 5066 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5067 SCTP_CALLED_DIRECTLY_NOCMPSET); 5068 SCTP_INP_DECR_REF(inp); 5069 goto out_of; 5070 } else { 5071 /* The socket is still open. */ 5072 SCTP_INP_DECR_REF(inp); 5073 } 5074 } 5075 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5076 SCTP_INP_RUNLOCK(inp); 5077 } 5078out_of: 5079 /* destroyed the asoc */ 5080#ifdef SCTP_LOG_CLOSING 5081 sctp_log_closing(inp, NULL, 11); 5082#endif 5083 return (1); 5084} 5085 5086 5087 5088/* 5089 * determine if a destination is "reachable" based upon the addresses bound 5090 * to the current endpoint (e.g. only v4 or v6 currently bound) 5091 */ 5092/* 5093 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5094 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5095 * types bound as its endpoint 5096 */ 5097int 5098sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5099{ 5100 struct sctp_inpcb *inp; 5101 int answer; 5102 5103 /* 5104 * No locks here, the TCB, in all cases is already locked and an 5105 * assoc is up. There is either a INP lock by the caller applied (in 5106 * asconf case when deleting an address) or NOT in the HB case, 5107 * however if HB then the INP increment is up and the INP will not 5108 * be removed (on top of the fact that we have a TCB lock). So we 5109 * only want to read the sctp_flags, which is either bound-all or 5110 * not.. no protection needed since once an assoc is up you can't be 5111 * changing your binding. 5112 */ 5113 inp = stcb->sctp_ep; 5114 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5115 /* if bound all, destination is not restricted */ 5116 /* 5117 * RRS: Question during lock work: Is this correct? If you 5118 * are bound-all you still might need to obey the V4--V6 5119 * flags??? IMO this bound-all stuff needs to be removed! 5120 */ 5121 return (1); 5122 } 5123 /* NOTE: all "scope" checks are done when local addresses are added */ 5124 if (destaddr->sa_family == AF_INET6) { 5125 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5126 } else if (destaddr->sa_family == AF_INET) { 5127 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5128 } else { 5129 /* invalid family, so it's unreachable */ 5130 answer = 0; 5131 } 5132 return (answer); 5133} 5134 5135/* 5136 * update the inp_vflags on an endpoint 5137 */ 5138static void 5139sctp_update_ep_vflag(struct sctp_inpcb *inp) 5140{ 5141 struct sctp_laddr *laddr; 5142 5143 /* first clear the flag */ 5144 inp->ip_inp.inp.inp_vflag = 0; 5145 /* set the flag based on addresses on the ep list */ 5146 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5147 if (laddr->ifa == NULL) { 5148 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5149 __FUNCTION__); 5150 continue; 5151 } 5152 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5153 continue; 5154 } 5155 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 5156 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5157 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 5158 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5159 } 5160 } 5161} 5162 5163/* 5164 * Add the address to the endpoint local address list There is nothing to be 5165 * done if we are bound to all addresses 5166 */ 5167void 5168sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5169{ 5170 struct sctp_laddr *laddr; 5171 int fnd, error = 0; 5172 5173 fnd = 0; 5174 5175 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5176 /* You are already bound to all. You have it already */ 5177 return; 5178 } 5179 if (ifa->address.sa.sa_family == AF_INET6) { 5180 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5181 /* Can't bind a non-useable addr. */ 5182 return; 5183 } 5184 } 5185 /* first, is it already present? */ 5186 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5187 if (laddr->ifa == ifa) { 5188 fnd = 1; 5189 break; 5190 } 5191 } 5192 5193 if (fnd == 0) { 5194 /* Not in the ep list */ 5195 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5196 if (error != 0) 5197 return; 5198 inp->laddr_count++; 5199 /* update inp_vflag flags */ 5200 if (ifa->address.sa.sa_family == AF_INET6) { 5201 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5202 } else if (ifa->address.sa.sa_family == AF_INET) { 5203 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5204 } 5205 } 5206 return; 5207} 5208 5209 5210/* 5211 * select a new (hopefully reachable) destination net (should only be used 5212 * when we deleted an ep addr that is the only usable source address to reach 5213 * the destination net) 5214 */ 5215static void 5216sctp_select_primary_destination(struct sctp_tcb *stcb) 5217{ 5218 struct sctp_nets *net; 5219 5220 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5221 /* for now, we'll just pick the first reachable one we find */ 5222 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5223 continue; 5224 if (sctp_destination_is_reachable(stcb, 5225 (struct sockaddr *)&net->ro._l_addr)) { 5226 /* found a reachable destination */ 5227 stcb->asoc.primary_destination = net; 5228 } 5229 } 5230 /* I can't there from here! ...we're gonna die shortly... */ 5231} 5232 5233 5234/* 5235 * Delete the address from the endpoint local address list There is nothing 5236 * to be done if we are bound to all addresses 5237 */ 5238void 5239sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5240{ 5241 struct sctp_laddr *laddr; 5242 int fnd; 5243 5244 fnd = 0; 5245 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5246 /* You are already bound to all. You have it already */ 5247 return; 5248 } 5249 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5250 if (laddr->ifa == ifa) { 5251 fnd = 1; 5252 break; 5253 } 5254 } 5255 if (fnd && (inp->laddr_count < 2)) { 5256 /* can't delete unless there are at LEAST 2 addresses */ 5257 return; 5258 } 5259 if (fnd) { 5260 /* 5261 * clean up any use of this address go through our 5262 * associations and clear any last_used_address that match 5263 * this one for each assoc, see if a new primary_destination 5264 * is needed 5265 */ 5266 struct sctp_tcb *stcb; 5267 5268 /* clean up "next_addr_touse" */ 5269 if (inp->next_addr_touse == laddr) 5270 /* delete this address */ 5271 inp->next_addr_touse = NULL; 5272 5273 /* clean up "last_used_address" */ 5274 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5275 struct sctp_nets *net; 5276 5277 SCTP_TCB_LOCK(stcb); 5278 if (stcb->asoc.last_used_address == laddr) 5279 /* delete this address */ 5280 stcb->asoc.last_used_address = NULL; 5281 /* 5282 * Now spin through all the nets and purge any ref 5283 * to laddr 5284 */ 5285 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5286 if (net->ro._s_addr && 5287 (net->ro._s_addr->ifa == laddr->ifa)) { 5288 /* Yep, purge src address selected */ 5289 sctp_rtentry_t *rt; 5290 5291 /* delete this address if cached */ 5292 rt = net->ro.ro_rt; 5293 if (rt != NULL) { 5294 RTFREE(rt); 5295 net->ro.ro_rt = NULL; 5296 } 5297 sctp_free_ifa(net->ro._s_addr); 5298 net->ro._s_addr = NULL; 5299 net->src_addr_selected = 0; 5300 } 5301 } 5302 SCTP_TCB_UNLOCK(stcb); 5303 } /* for each tcb */ 5304 /* remove it from the ep list */ 5305 sctp_remove_laddr(laddr); 5306 inp->laddr_count--; 5307 /* update inp_vflag flags */ 5308 sctp_update_ep_vflag(inp); 5309 } 5310 return; 5311} 5312 5313/* 5314 * Add the address to the TCB local address restricted list. 5315 * This is a "pending" address list (eg. addresses waiting for an 5316 * ASCONF-ACK response) and cannot be used as a valid source address. 5317 */ 5318void 5319sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5320{ 5321 struct sctp_inpcb *inp; 5322 struct sctp_laddr *laddr; 5323 struct sctpladdr *list; 5324 5325 /* 5326 * Assumes TCB is locked.. and possibly the INP. May need to 5327 * confirm/fix that if we need it and is not the case. 5328 */ 5329 list = &stcb->asoc.sctp_restricted_addrs; 5330 5331 inp = stcb->sctp_ep; 5332 if (ifa->address.sa.sa_family == AF_INET6) { 5333 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5334 /* Can't bind a non-existent addr. */ 5335 return; 5336 } 5337 } 5338 /* does the address already exist? */ 5339 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5340 if (laddr->ifa == ifa) { 5341 return; 5342 } 5343 } 5344 5345 /* add to the list */ 5346 (void)sctp_insert_laddr(list, ifa, 0); 5347 return; 5348} 5349 5350/* 5351 * insert an laddr entry with the given ifa for the desired list 5352 */ 5353int 5354sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5355{ 5356 struct sctp_laddr *laddr; 5357 5358 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5359 if (laddr == NULL) { 5360 /* out of memory? */ 5361 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5362 return (EINVAL); 5363 } 5364 SCTP_INCR_LADDR_COUNT(); 5365 bzero(laddr, sizeof(*laddr)); 5366 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5367 laddr->ifa = ifa; 5368 laddr->action = act; 5369 atomic_add_int(&ifa->refcount, 1); 5370 /* insert it */ 5371 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5372 5373 return (0); 5374} 5375 5376/* 5377 * Remove an laddr entry from the local address list (on an assoc) 5378 */ 5379void 5380sctp_remove_laddr(struct sctp_laddr *laddr) 5381{ 5382 5383 /* remove from the list */ 5384 LIST_REMOVE(laddr, sctp_nxt_addr); 5385 sctp_free_ifa(laddr->ifa); 5386 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5387 SCTP_DECR_LADDR_COUNT(); 5388} 5389 5390/* 5391 * Remove a local address from the TCB local address restricted list 5392 */ 5393void 5394sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5395{ 5396 struct sctp_inpcb *inp; 5397 struct sctp_laddr *laddr; 5398 5399 /* 5400 * This is called by asconf work. It is assumed that a) The TCB is 5401 * locked and b) The INP is locked. This is true in as much as I can 5402 * trace through the entry asconf code where I did these locks. 5403 * Again, the ASCONF code is a bit different in that it does lock 5404 * the INP during its work often times. This must be since we don't 5405 * want other proc's looking up things while what they are looking 5406 * up is changing :-D 5407 */ 5408 5409 inp = stcb->sctp_ep; 5410 /* if subset bound and don't allow ASCONF's, can't delete last */ 5411 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5412 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5413 if (stcb->sctp_ep->laddr_count < 2) { 5414 /* can't delete last address */ 5415 return; 5416 } 5417 } 5418 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5419 /* remove the address if it exists */ 5420 if (laddr->ifa == NULL) 5421 continue; 5422 if (laddr->ifa == ifa) { 5423 sctp_remove_laddr(laddr); 5424 return; 5425 } 5426 } 5427 5428 /* address not found! */ 5429 return; 5430} 5431 5432/* 5433 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5434 */ 5435/* sysctl */ 5436static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5437static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5438 5439void 5440sctp_pcb_init() 5441{ 5442 /* 5443 * SCTP initialization for the PCB structures should be called by 5444 * the sctp_init() funciton. 5445 */ 5446 int i; 5447 struct timeval tv; 5448 5449 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5450 /* error I was called twice */ 5451 return; 5452 } 5453 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5454 5455#if defined(SCTP_LOCAL_TRACE_BUF) 5456 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5457#endif 5458 (void)SCTP_GETTIME_TIMEVAL(&tv); 5459#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5460 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5461 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5462#else 5463 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5464 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5465#endif 5466 /* init the empty list of (All) Endpoints */ 5467 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5468 5469 5470 /* init the hash table of endpoints */ 5471 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5472 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5473 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5474 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5475 &SCTP_BASE_INFO(hashasocmark)); 5476 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5477 &SCTP_BASE_INFO(hashmark)); 5478 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5479 &SCTP_BASE_INFO(hashtcpmark)); 5480 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5481 5482 5483 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5484 &SCTP_BASE_INFO(hashvrfmark)); 5485 5486 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5487 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5488 /* init the zones */ 5489 /* 5490 * FIX ME: Should check for NULL returns, but if it does fail we are 5491 * doomed to panic anyways... add later maybe. 5492 */ 5493 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5494 sizeof(struct sctp_inpcb), maxsockets); 5495 5496 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5497 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5498 5499 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5500 sizeof(struct sctp_laddr), 5501 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5502 5503 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5504 sizeof(struct sctp_nets), 5505 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5506 5507 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5508 sizeof(struct sctp_tmit_chunk), 5509 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5510 5511 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5512 sizeof(struct sctp_queued_to_read), 5513 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5514 5515 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5516 sizeof(struct sctp_stream_queue_pending), 5517 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5518 5519 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5520 sizeof(struct sctp_asconf), 5521 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5522 5523 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5524 sizeof(struct sctp_asconf_ack), 5525 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5526 5527 5528 /* Master Lock INIT for info structure */ 5529 SCTP_INP_INFO_LOCK_INIT(); 5530 SCTP_STATLOG_INIT_LOCK(); 5531 5532 SCTP_IPI_COUNT_INIT(); 5533 SCTP_IPI_ADDR_INIT(); 5534#ifdef SCTP_PACKET_LOGGING 5535 SCTP_IP_PKTLOG_INIT(); 5536#endif 5537 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5538 5539 SCTP_WQ_ADDR_INIT(); 5540 /* not sure if we need all the counts */ 5541 SCTP_BASE_INFO(ipi_count_ep) = 0; 5542 /* assoc/tcb zone info */ 5543 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5544 /* local addrlist zone info */ 5545 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5546 /* remote addrlist zone info */ 5547 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5548 /* chunk info */ 5549 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5550 5551 /* socket queue zone info */ 5552 SCTP_BASE_INFO(ipi_count_readq) = 0; 5553 5554 /* stream out queue cont */ 5555 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5556 5557 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5558 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5559 5560 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5561 5562 /* Init the TIMEWAIT list */ 5563 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5564 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5565 } 5566 5567 sctp_startup_iterator(); 5568 5569 /* 5570 * INIT the default VRF which for BSD is the only one, other O/S's 5571 * may have more. But initially they must start with one and then 5572 * add the VRF's as addresses are added. 5573 */ 5574 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5575 5576} 5577 5578/* 5579 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5580 */ 5581void 5582sctp_pcb_finish(void) 5583{ 5584 struct sctp_vrflist *vrf_bucket; 5585 struct sctp_vrf *vrf; 5586 struct sctp_ifn *ifn; 5587 struct sctp_ifa *ifa; 5588 struct sctpvtaghead *chain; 5589 struct sctp_tagblock *twait_block, *prev_twait_block; 5590 struct sctp_laddr *wi; 5591 int i; 5592 5593 /* 5594 * Free BSD the it thread never exits but we do clean up. The only 5595 * way freebsd reaches here if we have VRF's but we still add the 5596 * ifdef to make it compile on old versions. 5597 */ 5598 { 5599 struct sctp_iterator *it, *nit; 5600 5601 SCTP_IPI_ITERATOR_WQ_LOCK(); 5602 it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead); 5603 while (it) { 5604 nit = TAILQ_NEXT(it, sctp_nxt_itr); 5605 if (it->vn != curvnet) { 5606 it = nit; 5607 continue; 5608 } 5609 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 5610 it, sctp_nxt_itr); 5611 if (it->function_atend != NULL) { 5612 (*it->function_atend) (it->pointer, it->val); 5613 } 5614 SCTP_FREE(it, SCTP_M_ITER); 5615 it = nit; 5616 } 5617 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5618 SCTP_ITERATOR_LOCK(); 5619 if ((sctp_it_ctl.cur_it) && 5620 (sctp_it_ctl.cur_it->vn == curvnet)) { 5621 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5622 } 5623 SCTP_ITERATOR_UNLOCK(); 5624 } 5625 5626 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5627 SCTP_WQ_ADDR_LOCK(); 5628 while ((wi = LIST_FIRST(&SCTP_BASE_INFO(addr_wq))) != NULL) { 5629 LIST_REMOVE(wi, sctp_nxt_addr); 5630 SCTP_DECR_LADDR_COUNT(); 5631 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5632 } 5633 SCTP_WQ_ADDR_UNLOCK(); 5634 5635 /* 5636 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5637 * destroyed first). 5638 */ 5639 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5640 while ((vrf = LIST_FIRST(vrf_bucket)) != NULL) { 5641 while ((ifn = LIST_FIRST(&vrf->ifnlist)) != NULL) { 5642 while ((ifa = LIST_FIRST(&ifn->ifalist)) != NULL) { 5643 /* free the ifa */ 5644 LIST_REMOVE(ifa, next_bucket); 5645 LIST_REMOVE(ifa, next_ifa); 5646 SCTP_FREE(ifa, SCTP_M_IFA); 5647 } 5648 /* free the ifn */ 5649 LIST_REMOVE(ifn, next_bucket); 5650 LIST_REMOVE(ifn, next_ifn); 5651 SCTP_FREE(ifn, SCTP_M_IFN); 5652 } 5653 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5654 /* free the vrf */ 5655 LIST_REMOVE(vrf, next_vrf); 5656 SCTP_FREE(vrf, SCTP_M_VRF); 5657 } 5658 /* free the vrf hashes */ 5659 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5660 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5661 5662 /* 5663 * free the TIMEWAIT list elements malloc'd in the function 5664 * sctp_add_vtag_to_timewait()... 5665 */ 5666 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5667 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5668 if (!LIST_EMPTY(chain)) { 5669 prev_twait_block = NULL; 5670 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5671 if (prev_twait_block) { 5672 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5673 } 5674 prev_twait_block = twait_block; 5675 } 5676 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5677 } 5678 } 5679 5680 /* free the locks and mutexes */ 5681#ifdef SCTP_PACKET_LOGGING 5682 SCTP_IP_PKTLOG_DESTROY(); 5683#endif 5684 SCTP_IPI_ADDR_DESTROY(); 5685 SCTP_STATLOG_DESTROY(); 5686 SCTP_INP_INFO_LOCK_DESTROY(); 5687 5688 SCTP_WQ_ADDR_DESTROY(); 5689 5690 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5691 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5692 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5693 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5694 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5695 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5696 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5697 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5698 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5699 /* Get rid of other stuff to */ 5700 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5701 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5702 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5703 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5704 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5705 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5706 5707} 5708 5709 5710int 5711sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5712 int iphlen, int offset, int limit, struct sctphdr *sh, 5713 struct sockaddr *altsa) 5714{ 5715 /* 5716 * grub through the INIT pulling addresses and loading them to the 5717 * nets structure in the asoc. The from address in the mbuf should 5718 * also be loaded (if it is not already). This routine can be called 5719 * with either INIT or INIT-ACK's as long as the m points to the IP 5720 * packet and the offset points to the beginning of the parameters. 5721 */ 5722 struct sctp_inpcb *inp, *l_inp; 5723 struct sctp_nets *net, *net_tmp; 5724 struct ip *iph; 5725 struct sctp_paramhdr *phdr, parm_buf; 5726 struct sctp_tcb *stcb_tmp; 5727 uint16_t ptype, plen; 5728 struct sockaddr *sa; 5729 struct sockaddr_storage dest_store; 5730 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 5731 struct sockaddr_in sin; 5732 struct sockaddr_in6 sin6; 5733 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5734 struct sctp_auth_random *p_random = NULL; 5735 uint16_t random_len = 0; 5736 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5737 struct sctp_auth_hmac_algo *hmacs = NULL; 5738 uint16_t hmacs_len = 0; 5739 uint8_t saw_asconf = 0; 5740 uint8_t saw_asconf_ack = 0; 5741 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 5742 struct sctp_auth_chunk_list *chunks = NULL; 5743 uint16_t num_chunks = 0; 5744 sctp_key_t *new_key; 5745 uint32_t keylen; 5746 int got_random = 0, got_hmacs = 0, got_chklist = 0; 5747 5748 /* First get the destination address setup too. */ 5749 memset(&sin, 0, sizeof(sin)); 5750 memset(&sin6, 0, sizeof(sin6)); 5751 5752 sin.sin_family = AF_INET; 5753 sin.sin_len = sizeof(sin); 5754 sin.sin_port = stcb->rport; 5755 5756 sin6.sin6_family = AF_INET6; 5757 sin6.sin6_len = sizeof(struct sockaddr_in6); 5758 sin6.sin6_port = stcb->rport; 5759 if (altsa == NULL) { 5760 iph = mtod(m, struct ip *); 5761 switch (iph->ip_v) { 5762 case IPVERSION: 5763 { 5764 /* its IPv4 */ 5765 struct sockaddr_in *sin_2; 5766 5767 sin_2 = (struct sockaddr_in *)(local_sa); 5768 memset(sin_2, 0, sizeof(sin)); 5769 sin_2->sin_family = AF_INET; 5770 sin_2->sin_len = sizeof(sin); 5771 sin_2->sin_port = sh->dest_port; 5772 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 5773 sin.sin_addr = iph->ip_src; 5774 sa = (struct sockaddr *)&sin; 5775 break; 5776 } 5777#ifdef INET6 5778 case IPV6_VERSION >> 4: 5779 { 5780 /* its IPv6 */ 5781 struct ip6_hdr *ip6; 5782 struct sockaddr_in6 *sin6_2; 5783 5784 ip6 = mtod(m, struct ip6_hdr *); 5785 sin6_2 = (struct sockaddr_in6 *)(local_sa); 5786 memset(sin6_2, 0, sizeof(sin6)); 5787 sin6_2->sin6_family = AF_INET6; 5788 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 5789 sin6_2->sin6_port = sh->dest_port; 5790 sin6.sin6_addr = ip6->ip6_src; 5791 sa = (struct sockaddr *)&sin6; 5792 break; 5793 } 5794#endif 5795 default: 5796 sa = NULL; 5797 break; 5798 } 5799 } else { 5800 /* 5801 * For cookies we use the src address NOT from the packet 5802 * but from the original INIT 5803 */ 5804 sa = altsa; 5805 } 5806 /* Turn off ECN until we get through all params */ 5807 stcb->asoc.ecn_allowed = 0; 5808 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5809 /* mark all addresses that we have currently on the list */ 5810 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 5811 } 5812 /* does the source address already exist? if so skip it */ 5813 l_inp = inp = stcb->sctp_ep; 5814 5815 atomic_add_int(&stcb->asoc.refcnt, 1); 5816 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 5817 atomic_add_int(&stcb->asoc.refcnt, -1); 5818 5819 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 5820 /* we must add the source address */ 5821 /* no scope set here since we have a tcb already. */ 5822 if ((sa->sa_family == AF_INET) && 5823 (stcb->asoc.ipv4_addr_legal)) { 5824 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 5825 return (-1); 5826 } 5827 } else if ((sa->sa_family == AF_INET6) && 5828 (stcb->asoc.ipv6_addr_legal)) { 5829 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 5830 return (-2); 5831 } 5832 } 5833 } else { 5834 if (net_tmp != NULL && stcb_tmp == stcb) { 5835 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 5836 } else if (stcb_tmp != stcb) { 5837 /* It belongs to another association? */ 5838 if (stcb_tmp) 5839 SCTP_TCB_UNLOCK(stcb_tmp); 5840 return (-3); 5841 } 5842 } 5843 if (stcb->asoc.state == 0) { 5844 /* the assoc was freed? */ 5845 return (-4); 5846 } 5847 /* 5848 * peer must explicitly turn this on. This may have been initialized 5849 * to be "on" in order to allow local addr changes while INIT's are 5850 * in flight. 5851 */ 5852 stcb->asoc.peer_supports_asconf = 0; 5853 /* now we must go through each of the params. */ 5854 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 5855 while (phdr) { 5856 ptype = ntohs(phdr->param_type); 5857 plen = ntohs(phdr->param_length); 5858 /* 5859 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 5860 * (int)plen); 5861 */ 5862 if (offset + plen > limit) { 5863 break; 5864 } 5865 if (plen == 0) { 5866 break; 5867 } 5868 if (ptype == SCTP_IPV4_ADDRESS) { 5869 if (stcb->asoc.ipv4_addr_legal) { 5870 struct sctp_ipv4addr_param *p4, p4_buf; 5871 5872 /* ok get the v4 address and check/add */ 5873 phdr = sctp_get_next_param(m, offset, 5874 (struct sctp_paramhdr *)&p4_buf, 5875 sizeof(p4_buf)); 5876 if (plen != sizeof(struct sctp_ipv4addr_param) || 5877 phdr == NULL) { 5878 return (-5); 5879 } 5880 p4 = (struct sctp_ipv4addr_param *)phdr; 5881 sin.sin_addr.s_addr = p4->addr; 5882 if (IN_MULTICAST(sin.sin_addr.s_addr)) { 5883 /* Skip multi-cast addresses */ 5884 goto next_param; 5885 } 5886 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 5887 (sin.sin_addr.s_addr == INADDR_ANY)) { 5888 goto next_param; 5889 } 5890 sa = (struct sockaddr *)&sin; 5891 inp = stcb->sctp_ep; 5892 atomic_add_int(&stcb->asoc.refcnt, 1); 5893 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5894 local_sa, stcb); 5895 atomic_add_int(&stcb->asoc.refcnt, -1); 5896 5897 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 5898 inp == NULL) { 5899 /* we must add the source address */ 5900 /* 5901 * no scope set since we have a tcb 5902 * already 5903 */ 5904 5905 /* 5906 * we must validate the state again 5907 * here 5908 */ 5909 add_it_now: 5910 if (stcb->asoc.state == 0) { 5911 /* the assoc was freed? */ 5912 return (-7); 5913 } 5914 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 5915 return (-8); 5916 } 5917 } else if (stcb_tmp == stcb) { 5918 if (stcb->asoc.state == 0) { 5919 /* the assoc was freed? */ 5920 return (-10); 5921 } 5922 if (net != NULL) { 5923 /* clear flag */ 5924 net->dest_state &= 5925 ~SCTP_ADDR_NOT_IN_ASSOC; 5926 } 5927 } else { 5928 /* 5929 * strange, address is in another 5930 * assoc? straighten out locks. 5931 */ 5932 if (stcb_tmp) { 5933 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 5934 /* 5935 * in setup state we 5936 * abort this guy 5937 */ 5938 sctp_abort_an_association(stcb_tmp->sctp_ep, 5939 stcb_tmp, 1, NULL, 0); 5940 goto add_it_now; 5941 } 5942 SCTP_TCB_UNLOCK(stcb_tmp); 5943 } 5944 if (stcb->asoc.state == 0) { 5945 /* the assoc was freed? */ 5946 return (-12); 5947 } 5948 return (-13); 5949 } 5950 } 5951 } else if (ptype == SCTP_IPV6_ADDRESS) { 5952 if (stcb->asoc.ipv6_addr_legal) { 5953 /* ok get the v6 address and check/add */ 5954 struct sctp_ipv6addr_param *p6, p6_buf; 5955 5956 phdr = sctp_get_next_param(m, offset, 5957 (struct sctp_paramhdr *)&p6_buf, 5958 sizeof(p6_buf)); 5959 if (plen != sizeof(struct sctp_ipv6addr_param) || 5960 phdr == NULL) { 5961 return (-14); 5962 } 5963 p6 = (struct sctp_ipv6addr_param *)phdr; 5964 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 5965 sizeof(p6->addr)); 5966 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 5967 /* Skip multi-cast addresses */ 5968 goto next_param; 5969 } 5970 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 5971 /* 5972 * Link local make no sense without 5973 * scope 5974 */ 5975 goto next_param; 5976 } 5977 sa = (struct sockaddr *)&sin6; 5978 inp = stcb->sctp_ep; 5979 atomic_add_int(&stcb->asoc.refcnt, 1); 5980 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5981 local_sa, stcb); 5982 atomic_add_int(&stcb->asoc.refcnt, -1); 5983 if (stcb_tmp == NULL && 5984 (inp == stcb->sctp_ep || inp == NULL)) { 5985 /* 5986 * we must validate the state again 5987 * here 5988 */ 5989 add_it_now6: 5990 if (stcb->asoc.state == 0) { 5991 /* the assoc was freed? */ 5992 return (-16); 5993 } 5994 /* 5995 * we must add the address, no scope 5996 * set 5997 */ 5998 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 5999 return (-17); 6000 } 6001 } else if (stcb_tmp == stcb) { 6002 /* 6003 * we must validate the state again 6004 * here 6005 */ 6006 if (stcb->asoc.state == 0) { 6007 /* the assoc was freed? */ 6008 return (-19); 6009 } 6010 if (net != NULL) { 6011 /* clear flag */ 6012 net->dest_state &= 6013 ~SCTP_ADDR_NOT_IN_ASSOC; 6014 } 6015 } else { 6016 /* 6017 * strange, address is in another 6018 * assoc? straighten out locks. 6019 */ 6020 if (stcb_tmp) 6021 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6022 /* 6023 * in setup state we 6024 * abort this guy 6025 */ 6026 sctp_abort_an_association(stcb_tmp->sctp_ep, 6027 stcb_tmp, 1, NULL, 0); 6028 goto add_it_now6; 6029 } 6030 SCTP_TCB_UNLOCK(stcb_tmp); 6031 6032 if (stcb->asoc.state == 0) { 6033 /* the assoc was freed? */ 6034 return (-21); 6035 } 6036 return (-22); 6037 } 6038 } 6039 } else if (ptype == SCTP_ECN_CAPABLE) { 6040 stcb->asoc.ecn_allowed = 1; 6041 } else if (ptype == SCTP_ULP_ADAPTATION) { 6042 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6043 struct sctp_adaptation_layer_indication ai, 6044 *aip; 6045 6046 phdr = sctp_get_next_param(m, offset, 6047 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6048 aip = (struct sctp_adaptation_layer_indication *)phdr; 6049 if (aip) { 6050 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6051 stcb->asoc.adaptation_needed = 1; 6052 } 6053 } 6054 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6055 struct sctp_asconf_addr_param lstore, *fee; 6056 struct sctp_asconf_addrv4_param *fii; 6057 int lptype; 6058 struct sockaddr *lsa = NULL; 6059 6060 stcb->asoc.peer_supports_asconf = 1; 6061 if (plen > sizeof(lstore)) { 6062 return (-23); 6063 } 6064 phdr = sctp_get_next_param(m, offset, 6065 (struct sctp_paramhdr *)&lstore, 6066 min(plen, sizeof(lstore))); 6067 if (phdr == NULL) { 6068 return (-24); 6069 } 6070 fee = (struct sctp_asconf_addr_param *)phdr; 6071 lptype = ntohs(fee->addrp.ph.param_type); 6072 if (lptype == SCTP_IPV4_ADDRESS) { 6073 if (plen != 6074 sizeof(struct sctp_asconf_addrv4_param)) { 6075 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6076 (int)sizeof(struct sctp_asconf_addrv4_param), 6077 plen); 6078 } else { 6079 fii = (struct sctp_asconf_addrv4_param *)fee; 6080 sin.sin_addr.s_addr = fii->addrp.addr; 6081 lsa = (struct sockaddr *)&sin; 6082 } 6083 } else if (lptype == SCTP_IPV6_ADDRESS) { 6084 if (plen != 6085 sizeof(struct sctp_asconf_addr_param)) { 6086 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6087 (int)sizeof(struct sctp_asconf_addr_param), 6088 plen); 6089 } else { 6090 memcpy(sin6.sin6_addr.s6_addr, 6091 fee->addrp.addr, 6092 sizeof(fee->addrp.addr)); 6093 lsa = (struct sockaddr *)&sin6; 6094 } 6095 } 6096 if (lsa) { 6097 (void)sctp_set_primary_addr(stcb, sa, NULL); 6098 } 6099 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6100 stcb->asoc.peer_supports_nat = 1; 6101 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6102 /* Peer supports pr-sctp */ 6103 stcb->asoc.peer_supports_prsctp = 1; 6104 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6105 /* A supported extension chunk */ 6106 struct sctp_supported_chunk_types_param *pr_supported; 6107 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6108 int num_ent, i; 6109 6110 phdr = sctp_get_next_param(m, offset, 6111 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6112 if (phdr == NULL) { 6113 return (-25); 6114 } 6115 stcb->asoc.peer_supports_asconf = 0; 6116 stcb->asoc.peer_supports_prsctp = 0; 6117 stcb->asoc.peer_supports_pktdrop = 0; 6118 stcb->asoc.peer_supports_strreset = 0; 6119 stcb->asoc.peer_supports_nr_sack = 0; 6120 stcb->asoc.peer_supports_auth = 0; 6121 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6122 num_ent = plen - sizeof(struct sctp_paramhdr); 6123 for (i = 0; i < num_ent; i++) { 6124 switch (pr_supported->chunk_types[i]) { 6125 case SCTP_ASCONF: 6126 case SCTP_ASCONF_ACK: 6127 stcb->asoc.peer_supports_asconf = 1; 6128 break; 6129 case SCTP_FORWARD_CUM_TSN: 6130 stcb->asoc.peer_supports_prsctp = 1; 6131 break; 6132 case SCTP_PACKET_DROPPED: 6133 stcb->asoc.peer_supports_pktdrop = 1; 6134 break; 6135 case SCTP_NR_SELECTIVE_ACK: 6136 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off)) 6137 stcb->asoc.peer_supports_nr_sack = 1; 6138 else 6139 stcb->asoc.peer_supports_nr_sack = 0; 6140 break; 6141 case SCTP_STREAM_RESET: 6142 stcb->asoc.peer_supports_strreset = 1; 6143 break; 6144 case SCTP_AUTHENTICATION: 6145 stcb->asoc.peer_supports_auth = 1; 6146 break; 6147 default: 6148 /* one I have not learned yet */ 6149 break; 6150 6151 } 6152 } 6153 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 6154 /* Peer supports ECN-nonce */ 6155 stcb->asoc.peer_supports_ecn_nonce = 1; 6156 stcb->asoc.ecn_nonce_allowed = 1; 6157 } else if (ptype == SCTP_RANDOM) { 6158 if (plen > sizeof(random_store)) 6159 break; 6160 if (got_random) { 6161 /* already processed a RANDOM */ 6162 goto next_param; 6163 } 6164 phdr = sctp_get_next_param(m, offset, 6165 (struct sctp_paramhdr *)random_store, 6166 min(sizeof(random_store), plen)); 6167 if (phdr == NULL) 6168 return (-26); 6169 p_random = (struct sctp_auth_random *)phdr; 6170 random_len = plen - sizeof(*p_random); 6171 /* enforce the random length */ 6172 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6173 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6174 return (-27); 6175 } 6176 got_random = 1; 6177 } else if (ptype == SCTP_HMAC_LIST) { 6178 int num_hmacs; 6179 int i; 6180 6181 if (plen > sizeof(hmacs_store)) 6182 break; 6183 if (got_hmacs) { 6184 /* already processed a HMAC list */ 6185 goto next_param; 6186 } 6187 phdr = sctp_get_next_param(m, offset, 6188 (struct sctp_paramhdr *)hmacs_store, 6189 min(plen, sizeof(hmacs_store))); 6190 if (phdr == NULL) 6191 return (-28); 6192 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6193 hmacs_len = plen - sizeof(*hmacs); 6194 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6195 /* validate the hmac list */ 6196 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6197 return (-29); 6198 } 6199 if (stcb->asoc.peer_hmacs != NULL) 6200 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6201 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6202 if (stcb->asoc.peer_hmacs != NULL) { 6203 for (i = 0; i < num_hmacs; i++) { 6204 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6205 ntohs(hmacs->hmac_ids[i])); 6206 } 6207 } 6208 got_hmacs = 1; 6209 } else if (ptype == SCTP_CHUNK_LIST) { 6210 int i; 6211 6212 if (plen > sizeof(chunks_store)) 6213 break; 6214 if (got_chklist) { 6215 /* already processed a Chunks list */ 6216 goto next_param; 6217 } 6218 phdr = sctp_get_next_param(m, offset, 6219 (struct sctp_paramhdr *)chunks_store, 6220 min(plen, sizeof(chunks_store))); 6221 if (phdr == NULL) 6222 return (-30); 6223 chunks = (struct sctp_auth_chunk_list *)phdr; 6224 num_chunks = plen - sizeof(*chunks); 6225 if (stcb->asoc.peer_auth_chunks != NULL) 6226 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6227 else 6228 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6229 for (i = 0; i < num_chunks; i++) { 6230 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6231 stcb->asoc.peer_auth_chunks); 6232 /* record asconf/asconf-ack if listed */ 6233 if (chunks->chunk_types[i] == SCTP_ASCONF) 6234 saw_asconf = 1; 6235 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6236 saw_asconf_ack = 1; 6237 6238 } 6239 got_chklist = 1; 6240 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6241 (ptype == SCTP_STATE_COOKIE) || 6242 (ptype == SCTP_UNRECOG_PARAM) || 6243 (ptype == SCTP_COOKIE_PRESERVE) || 6244 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6245 (ptype == SCTP_ADD_IP_ADDRESS) || 6246 (ptype == SCTP_DEL_IP_ADDRESS) || 6247 (ptype == SCTP_ERROR_CAUSE_IND) || 6248 (ptype == SCTP_SUCCESS_REPORT)) { 6249 /* don't care */ ; 6250 } else { 6251 if ((ptype & 0x8000) == 0x0000) { 6252 /* 6253 * must stop processing the rest of the 6254 * param's. Any report bits were handled 6255 * with the call to 6256 * sctp_arethere_unrecognized_parameters() 6257 * when the INIT or INIT-ACK was first seen. 6258 */ 6259 break; 6260 } 6261 } 6262 6263next_param: 6264 offset += SCTP_SIZE32(plen); 6265 if (offset >= limit) { 6266 break; 6267 } 6268 phdr = sctp_get_next_param(m, offset, &parm_buf, 6269 sizeof(parm_buf)); 6270 } 6271 /* Now check to see if we need to purge any addresses */ 6272 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { 6273 net_tmp = TAILQ_NEXT(net, sctp_next); 6274 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6275 SCTP_ADDR_NOT_IN_ASSOC) { 6276 /* This address has been removed from the asoc */ 6277 /* remove and free it */ 6278 stcb->asoc.numnets--; 6279 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6280 sctp_free_remote_addr(net); 6281 if (net == stcb->asoc.primary_destination) { 6282 stcb->asoc.primary_destination = NULL; 6283 sctp_select_primary_destination(stcb); 6284 } 6285 } 6286 } 6287 /* validate authentication required parameters */ 6288 if (got_random && got_hmacs) { 6289 stcb->asoc.peer_supports_auth = 1; 6290 } else { 6291 stcb->asoc.peer_supports_auth = 0; 6292 } 6293 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6294 /* peer does not support auth but sent a chunks list? */ 6295 return (-31); 6296 } 6297 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6298 !stcb->asoc.peer_supports_auth) { 6299 /* peer supports asconf but not auth? */ 6300 return (-32); 6301 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6302 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6303 return (-33); 6304 } 6305 /* concatenate the full random key */ 6306 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6307 if (chunks != NULL) { 6308 keylen += sizeof(*chunks) + num_chunks; 6309 } 6310 new_key = sctp_alloc_key(keylen); 6311 if (new_key != NULL) { 6312 /* copy in the RANDOM */ 6313 if (p_random != NULL) { 6314 keylen = sizeof(*p_random) + random_len; 6315 bcopy(p_random, new_key->key, keylen); 6316 } 6317 /* append in the AUTH chunks */ 6318 if (chunks != NULL) { 6319 bcopy(chunks, new_key->key + keylen, 6320 sizeof(*chunks) + num_chunks); 6321 keylen += sizeof(*chunks) + num_chunks; 6322 } 6323 /* append in the HMACs */ 6324 if (hmacs != NULL) { 6325 bcopy(hmacs, new_key->key + keylen, 6326 sizeof(*hmacs) + hmacs_len); 6327 } 6328 } else { 6329 /* failed to get memory for the key */ 6330 return (-34); 6331 } 6332 if (stcb->asoc.authinfo.peer_random != NULL) 6333 sctp_free_key(stcb->asoc.authinfo.peer_random); 6334 stcb->asoc.authinfo.peer_random = new_key; 6335 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6336 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6337 6338 return (0); 6339} 6340 6341int 6342sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6343 struct sctp_nets *net) 6344{ 6345 /* make sure the requested primary address exists in the assoc */ 6346 if (net == NULL && sa) 6347 net = sctp_findnet(stcb, sa); 6348 6349 if (net == NULL) { 6350 /* didn't find the requested primary address! */ 6351 return (-1); 6352 } else { 6353 /* set the primary address */ 6354 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6355 /* Must be confirmed, so queue to set */ 6356 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6357 return (0); 6358 } 6359 stcb->asoc.primary_destination = net; 6360 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 6361 net = TAILQ_FIRST(&stcb->asoc.nets); 6362 if (net != stcb->asoc.primary_destination) { 6363 /* 6364 * first one on the list is NOT the primary 6365 * sctp_cmpaddr() is much more efficent if the 6366 * primary is the first on the list, make it so. 6367 */ 6368 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6369 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6370 } 6371 return (0); 6372 } 6373} 6374 6375int 6376sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6377{ 6378 /* 6379 * This function serves two purposes. It will see if a TAG can be 6380 * re-used and return 1 for yes it is ok and 0 for don't use that 6381 * tag. A secondary function it will do is purge out old tags that 6382 * can be removed. 6383 */ 6384 struct sctpvtaghead *chain; 6385 struct sctp_tagblock *twait_block; 6386 struct sctpasochead *head; 6387 struct sctp_tcb *stcb; 6388 int i; 6389 6390 SCTP_INP_INFO_RLOCK(); 6391 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6392 SCTP_BASE_INFO(hashasocmark))]; 6393 if (head == NULL) { 6394 /* invalid vtag */ 6395 goto skip_vtag_check; 6396 } 6397 LIST_FOREACH(stcb, head, sctp_asocs) { 6398 /* 6399 * We choose not to lock anything here. TCB's can't be 6400 * removed since we have the read lock, so they can't be 6401 * freed on us, same thing for the INP. I may be wrong with 6402 * this assumption, but we will go with it for now :-) 6403 */ 6404 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6405 continue; 6406 } 6407 if (stcb->asoc.my_vtag == tag) { 6408 /* candidate */ 6409 if (stcb->rport != rport) { 6410 continue; 6411 } 6412 if (stcb->sctp_ep->sctp_lport != lport) { 6413 continue; 6414 } 6415 /* Its a used tag set */ 6416 SCTP_INP_INFO_WUNLOCK(); 6417 return (0); 6418 } 6419 } 6420skip_vtag_check: 6421 6422 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6423 /* Now what about timed wait ? */ 6424 if (!LIST_EMPTY(chain)) { 6425 /* 6426 * Block(s) are present, lets see if we have this tag in the 6427 * list 6428 */ 6429 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6430 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6431 if (twait_block->vtag_block[i].v_tag == 0) { 6432 /* not used */ 6433 continue; 6434 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6435 now->tv_sec) { 6436 /* Audit expires this guy */ 6437 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6438 twait_block->vtag_block[i].v_tag = 0; 6439 twait_block->vtag_block[i].lport = 0; 6440 twait_block->vtag_block[i].rport = 0; 6441 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6442 (twait_block->vtag_block[i].lport == lport) && 6443 (twait_block->vtag_block[i].rport == rport)) { 6444 /* Bad tag, sorry :< */ 6445 SCTP_INP_INFO_WUNLOCK(); 6446 return (0); 6447 } 6448 } 6449 } 6450 } 6451 SCTP_INP_INFO_RUNLOCK(); 6452 return (1); 6453} 6454 6455 6456static sctp_assoc_t reneged_asoc_ids[256]; 6457static uint8_t reneged_at = 0; 6458 6459 6460static void 6461sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6462{ 6463 /* 6464 * We must hunt this association for MBUF's past the cumack (i.e. 6465 * out of order data that we can renege on). 6466 */ 6467 struct sctp_association *asoc; 6468 struct sctp_tmit_chunk *chk, *nchk; 6469 uint32_t cumulative_tsn_p1; 6470 struct sctp_queued_to_read *ctl, *nctl; 6471 int cnt, strmat; 6472 uint32_t gap, i; 6473 int fnd = 0; 6474 6475 /* We look for anything larger than the cum-ack + 1 */ 6476 6477 asoc = &stcb->asoc; 6478 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6479 /* none we can reneg on. */ 6480 return; 6481 } 6482 SCTP_STAT_INCR(sctps_protocol_drains_done); 6483 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6484 cnt = 0; 6485 /* First look in the re-assembly queue */ 6486 chk = TAILQ_FIRST(&asoc->reasmqueue); 6487 while (chk) { 6488 /* Get the next one */ 6489 nchk = TAILQ_NEXT(chk, sctp_next); 6490 if (compare_with_wrap(chk->rec.data.TSN_seq, 6491 cumulative_tsn_p1, MAX_TSN)) { 6492 /* Yep it is above cum-ack */ 6493 cnt++; 6494 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6495 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6496 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6497 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6498 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6499 if (chk->data) { 6500 sctp_m_freem(chk->data); 6501 chk->data = NULL; 6502 } 6503 sctp_free_a_chunk(stcb, chk); 6504 } 6505 chk = nchk; 6506 } 6507 /* Ok that was fun, now we will drain all the inbound streams? */ 6508 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6509 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); 6510 while (ctl) { 6511 nctl = TAILQ_NEXT(ctl, next); 6512 if (compare_with_wrap(ctl->sinfo_tsn, 6513 cumulative_tsn_p1, MAX_TSN)) { 6514 /* Yep it is above cum-ack */ 6515 cnt++; 6516 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6517 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6518 sctp_ucount_decr(asoc->cnt_on_all_streams); 6519 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6520 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6521 if (ctl->data) { 6522 sctp_m_freem(ctl->data); 6523 ctl->data = NULL; 6524 } 6525 sctp_free_remote_addr(ctl->whoFrom); 6526 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6527 SCTP_DECR_READQ_COUNT(); 6528 } 6529 ctl = nctl; 6530 } 6531 } 6532 if (cnt) { 6533 /* We must back down to see what the new highest is */ 6534 for (i = asoc->highest_tsn_inside_map; 6535 (compare_with_wrap(i, asoc->mapping_array_base_tsn, MAX_TSN) || (i == asoc->mapping_array_base_tsn)); 6536 i--) { 6537 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6538 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6539 asoc->highest_tsn_inside_map = i; 6540 fnd = 1; 6541 break; 6542 } 6543 } 6544 if (!fnd) { 6545 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6546 } 6547 /* 6548 * Question, should we go through the delivery queue? The 6549 * only reason things are on here is the app not reading OR 6550 * a p-d-api up. An attacker COULD send enough in to 6551 * initiate the PD-API and then send a bunch of stuff to 6552 * other streams... these would wind up on the delivery 6553 * queue.. and then we would not get to them. But in order 6554 * to do this I then have to back-track and un-deliver 6555 * sequence numbers in streams.. el-yucko. I think for now 6556 * we will NOT look at the delivery queue and leave it to be 6557 * something to consider later. An alternative would be to 6558 * abort the P-D-API with a notification and then deliver 6559 * the data.... Or another method might be to keep track of 6560 * how many times the situation occurs and if we see a 6561 * possible attack underway just abort the association. 6562 */ 6563#ifdef SCTP_DEBUG 6564 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6565#endif 6566 /* 6567 * Now do we need to find a new 6568 * asoc->highest_tsn_inside_map? 6569 */ 6570 asoc->last_revoke_count = cnt; 6571 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6572 /* sa_ignore NO_NULL_CHK */ 6573 sctp_send_sack(stcb); 6574 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6575 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 6576 reneged_at++; 6577 } 6578 /* 6579 * Another issue, in un-setting the TSN's in the mapping array we 6580 * DID NOT adjust the higest_tsn marker. This will cause one of two 6581 * things to occur. It may cause us to do extra work in checking for 6582 * our mapping array movement. More importantly it may cause us to 6583 * SACK every datagram. This may not be a bad thing though since we 6584 * will recover once we get our cum-ack above and all this stuff we 6585 * dumped recovered. 6586 */ 6587} 6588 6589void 6590sctp_drain() 6591{ 6592 /* 6593 * We must walk the PCB lists for ALL associations here. The system 6594 * is LOW on MBUF's and needs help. This is where reneging will 6595 * occur. We really hope this does NOT happen! 6596 */ 6597 VNET_ITERATOR_DECL(vnet_iter); 6598 VNET_LIST_RLOCK_NOSLEEP(); 6599 VNET_FOREACH(vnet_iter) { 6600 CURVNET_SET(vnet_iter); 6601 struct sctp_inpcb *inp; 6602 struct sctp_tcb *stcb; 6603 6604 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6605 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6606#ifdef VIMAGE 6607 continue; 6608#else 6609 return; 6610#endif 6611 } 6612 SCTP_INP_INFO_RLOCK(); 6613 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6614 /* For each endpoint */ 6615 SCTP_INP_RLOCK(inp); 6616 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6617 /* For each association */ 6618 SCTP_TCB_LOCK(stcb); 6619 sctp_drain_mbufs(inp, stcb); 6620 SCTP_TCB_UNLOCK(stcb); 6621 } 6622 SCTP_INP_RUNLOCK(inp); 6623 } 6624 SCTP_INP_INFO_RUNLOCK(); 6625 CURVNET_RESTORE(); 6626 } 6627 VNET_LIST_RUNLOCK_NOSLEEP(); 6628} 6629 6630/* 6631 * start a new iterator 6632 * iterates through all endpoints and associations based on the pcb_state 6633 * flags and asoc_state. "af" (mandatory) is executed for all matching 6634 * assocs and "ef" (optional) is executed when the iterator completes. 6635 * "inpf" (optional) is executed for each new endpoint as it is being 6636 * iterated through. inpe (optional) is called when the inp completes 6637 * its way through all the stcbs. 6638 */ 6639int 6640sctp_initiate_iterator(inp_func inpf, 6641 asoc_func af, 6642 inp_func inpe, 6643 uint32_t pcb_state, 6644 uint32_t pcb_features, 6645 uint32_t asoc_state, 6646 void *argp, 6647 uint32_t argi, 6648 end_func ef, 6649 struct sctp_inpcb *s_inp, 6650 uint8_t chunk_output_off) 6651{ 6652 struct sctp_iterator *it = NULL; 6653 6654 if (af == NULL) { 6655 return (-1); 6656 } 6657 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6658 SCTP_M_ITER); 6659 if (it == NULL) { 6660 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6661 return (ENOMEM); 6662 } 6663 memset(it, 0, sizeof(*it)); 6664 it->function_assoc = af; 6665 it->function_inp = inpf; 6666 if (inpf) 6667 it->done_current_ep = 0; 6668 else 6669 it->done_current_ep = 1; 6670 it->function_atend = ef; 6671 it->pointer = argp; 6672 it->val = argi; 6673 it->pcb_flags = pcb_state; 6674 it->pcb_features = pcb_features; 6675 it->asoc_state = asoc_state; 6676 it->function_inp_end = inpe; 6677 it->no_chunk_output = chunk_output_off; 6678 it->vn = curvnet; 6679 if (s_inp) { 6680 it->inp = s_inp; 6681 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6682 } else { 6683 SCTP_INP_INFO_RLOCK(); 6684 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6685 6686 SCTP_INP_INFO_RUNLOCK(); 6687 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6688 6689 } 6690 SCTP_IPI_ITERATOR_WQ_LOCK(); 6691 if (it->inp) { 6692 SCTP_INP_INCR_REF(it->inp); 6693 } 6694 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6695 if (sctp_it_ctl.iterator_running == 0) { 6696 sctp_wakeup_iterator(); 6697 } 6698 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6699 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6700 return (0); 6701} 6702