sctp_pcb.c revision 212225
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 212225 2010-09-05 13:41:45Z 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"); 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 1013static int 1014sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1015{ 1016 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 1017 int ipv4_addr_legal, ipv6_addr_legal; 1018 struct sctp_vrf *vrf; 1019 struct sctp_ifn *sctp_ifn; 1020 struct sctp_ifa *sctp_ifa; 1021 1022 loopback_scope = stcb->asoc.loopback_scope; 1023 ipv4_local_scope = stcb->asoc.ipv4_local_scope; 1024 local_scope = stcb->asoc.local_scope; 1025 site_scope = stcb->asoc.site_scope; 1026 ipv4_addr_legal = ipv6_addr_legal = 0; 1027 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1028 ipv6_addr_legal = 1; 1029 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) { 1030 ipv4_addr_legal = 1; 1031 } 1032 } else { 1033 ipv4_addr_legal = 1; 1034 } 1035 1036 SCTP_IPI_ADDR_RLOCK(); 1037 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1038 if (vrf == NULL) { 1039 /* no vrf, no addresses */ 1040 SCTP_IPI_ADDR_RUNLOCK(); 1041 return (0); 1042 } 1043 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1044 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1045 if ((loopback_scope == 0) && 1046 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1047 continue; 1048 } 1049 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1050 if (sctp_is_addr_restricted(stcb, sctp_ifa)) 1051 continue; 1052 switch (sctp_ifa->address.sa.sa_family) { 1053#ifdef INET 1054 case AF_INET: 1055 if (ipv4_addr_legal) { 1056 struct sockaddr_in *sin, 1057 *rsin; 1058 1059 sin = &sctp_ifa->address.sin; 1060 rsin = (struct sockaddr_in *)to; 1061 if ((ipv4_local_scope == 0) && 1062 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1063 continue; 1064 } 1065 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1066 SCTP_IPI_ADDR_RUNLOCK(); 1067 return (1); 1068 } 1069 } 1070 break; 1071#endif 1072#ifdef INET6 1073 case AF_INET6: 1074 if (ipv6_addr_legal) { 1075 struct sockaddr_in6 *sin6, 1076 *rsin6; 1077 1078 sin6 = &sctp_ifa->address.sin6; 1079 rsin6 = (struct sockaddr_in6 *)to; 1080 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1081 if (local_scope == 0) 1082 continue; 1083 if (sin6->sin6_scope_id == 0) { 1084 if (sa6_recoverscope(sin6) != 0) 1085 continue; 1086 } 1087 } 1088 if ((site_scope == 0) && 1089 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1090 continue; 1091 } 1092 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1093 SCTP_IPI_ADDR_RUNLOCK(); 1094 return (1); 1095 } 1096 } 1097 break; 1098#endif 1099 default: 1100 /* TSNH */ 1101 break; 1102 } 1103 } 1104 } 1105 } else { 1106 struct sctp_laddr *laddr; 1107 1108 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1109 if (sctp_is_addr_restricted(stcb, laddr->ifa)) { 1110 continue; 1111 } 1112 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 1113 continue; 1114 } 1115 switch (to->sa_family) { 1116#ifdef INET 1117 case AF_INET: 1118 { 1119 struct sockaddr_in *sin, *rsin; 1120 1121 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 1122 rsin = (struct sockaddr_in *)to; 1123 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1124 SCTP_IPI_ADDR_RUNLOCK(); 1125 return (1); 1126 } 1127 break; 1128 } 1129#endif 1130#ifdef INET6 1131 case AF_INET6: 1132 { 1133 struct sockaddr_in6 *sin6, *rsin6; 1134 1135 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1136 rsin6 = (struct sockaddr_in6 *)to; 1137 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1138 SCTP_IPI_ADDR_RUNLOCK(); 1139 return (1); 1140 } 1141 break; 1142 } 1143 1144#endif 1145 default: 1146 /* TSNH */ 1147 break; 1148 } 1149 1150 } 1151 } 1152 SCTP_IPI_ADDR_RUNLOCK(); 1153 return (0); 1154} 1155 1156/* 1157 * rules for use 1158 * 1159 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1160 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1161 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1162 * NULL. 1163 */ 1164 1165struct sctp_tcb * 1166sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1167 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1168{ 1169 struct sctpasochead *head; 1170 struct sctp_inpcb *inp; 1171 struct sctp_tcb *stcb = NULL; 1172 struct sctp_nets *net; 1173 uint16_t rport; 1174 1175 inp = *inp_p; 1176 if (remote->sa_family == AF_INET) { 1177 rport = (((struct sockaddr_in *)remote)->sin_port); 1178 } else if (remote->sa_family == AF_INET6) { 1179 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1180 } else { 1181 return (NULL); 1182 } 1183 if (locked_tcb) { 1184 /* 1185 * UN-lock so we can do proper locking here this occurs when 1186 * called from load_addresses_from_init. 1187 */ 1188 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1189 SCTP_TCB_UNLOCK(locked_tcb); 1190 } 1191 SCTP_INP_INFO_RLOCK(); 1192 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1193 /*- 1194 * Now either this guy is our listener or it's the 1195 * connector. If it is the one that issued the connect, then 1196 * it's only chance is to be the first TCB in the list. If 1197 * it is the acceptor, then do the special_lookup to hash 1198 * and find the real inp. 1199 */ 1200 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1201 /* to is peer addr, from is my addr */ 1202 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1203 netp, inp->def_vrf_id); 1204 if ((stcb != NULL) && (locked_tcb == NULL)) { 1205 /* we have a locked tcb, lower refcount */ 1206 SCTP_INP_DECR_REF(inp); 1207 } 1208 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1209 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1210 SCTP_TCB_LOCK(locked_tcb); 1211 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1212 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1213 } 1214 SCTP_INP_INFO_RUNLOCK(); 1215 return (stcb); 1216 } else { 1217 SCTP_INP_WLOCK(inp); 1218 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1219 goto null_return; 1220 } 1221 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1222 if (stcb == NULL) { 1223 goto null_return; 1224 } 1225 SCTP_TCB_LOCK(stcb); 1226 1227 if (stcb->rport != rport) { 1228 /* remote port does not match. */ 1229 SCTP_TCB_UNLOCK(stcb); 1230 goto null_return; 1231 } 1232 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1233 SCTP_TCB_UNLOCK(stcb); 1234 goto null_return; 1235 } 1236 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1237 SCTP_TCB_UNLOCK(stcb); 1238 goto null_return; 1239 } 1240 /* now look at the list of remote addresses */ 1241 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1242#ifdef INVARIANTS 1243 if (net == (TAILQ_NEXT(net, sctp_next))) { 1244 panic("Corrupt net list"); 1245 } 1246#endif 1247 if (net->ro._l_addr.sa.sa_family != 1248 remote->sa_family) { 1249 /* not the same family */ 1250 continue; 1251 } 1252 switch (remote->sa_family) { 1253 case AF_INET: 1254 { 1255 struct sockaddr_in *sin, 1256 *rsin; 1257 1258 sin = (struct sockaddr_in *) 1259 &net->ro._l_addr; 1260 rsin = (struct sockaddr_in *)remote; 1261 if (sin->sin_addr.s_addr == 1262 rsin->sin_addr.s_addr) { 1263 /* found it */ 1264 if (netp != NULL) { 1265 *netp = net; 1266 } 1267 if (locked_tcb == NULL) { 1268 SCTP_INP_DECR_REF(inp); 1269 } else if (locked_tcb != stcb) { 1270 SCTP_TCB_LOCK(locked_tcb); 1271 } 1272 if (locked_tcb) { 1273 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1274 } 1275 SCTP_INP_WUNLOCK(inp); 1276 SCTP_INP_INFO_RUNLOCK(); 1277 return (stcb); 1278 } 1279 break; 1280 } 1281#ifdef INET6 1282 case AF_INET6: 1283 { 1284 struct sockaddr_in6 *sin6, 1285 *rsin6; 1286 1287 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1288 rsin6 = (struct sockaddr_in6 *)remote; 1289 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1290 rsin6)) { 1291 /* found it */ 1292 if (netp != NULL) { 1293 *netp = net; 1294 } 1295 if (locked_tcb == NULL) { 1296 SCTP_INP_DECR_REF(inp); 1297 } else if (locked_tcb != stcb) { 1298 SCTP_TCB_LOCK(locked_tcb); 1299 } 1300 if (locked_tcb) { 1301 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1302 } 1303 SCTP_INP_WUNLOCK(inp); 1304 SCTP_INP_INFO_RUNLOCK(); 1305 return (stcb); 1306 } 1307 break; 1308 } 1309#endif 1310 default: 1311 /* TSNH */ 1312 break; 1313 } 1314 } 1315 SCTP_TCB_UNLOCK(stcb); 1316 } 1317 } else { 1318 SCTP_INP_WLOCK(inp); 1319 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1320 goto null_return; 1321 } 1322 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1323 inp->sctp_hashmark)]; 1324 if (head == NULL) { 1325 goto null_return; 1326 } 1327 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1328 if (stcb->rport != rport) { 1329 /* remote port does not match */ 1330 continue; 1331 } 1332 SCTP_TCB_LOCK(stcb); 1333 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1334 SCTP_TCB_UNLOCK(stcb); 1335 continue; 1336 } 1337 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1338 SCTP_TCB_UNLOCK(stcb); 1339 continue; 1340 } 1341 /* now look at the list of remote addresses */ 1342 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1343#ifdef INVARIANTS 1344 if (net == (TAILQ_NEXT(net, sctp_next))) { 1345 panic("Corrupt net list"); 1346 } 1347#endif 1348 if (net->ro._l_addr.sa.sa_family != 1349 remote->sa_family) { 1350 /* not the same family */ 1351 continue; 1352 } 1353 switch (remote->sa_family) { 1354 case AF_INET: 1355 { 1356 struct sockaddr_in *sin, 1357 *rsin; 1358 1359 sin = (struct sockaddr_in *) 1360 &net->ro._l_addr; 1361 rsin = (struct sockaddr_in *)remote; 1362 if (sin->sin_addr.s_addr == 1363 rsin->sin_addr.s_addr) { 1364 /* found it */ 1365 if (netp != NULL) { 1366 *netp = net; 1367 } 1368 if (locked_tcb == NULL) { 1369 SCTP_INP_DECR_REF(inp); 1370 } else if (locked_tcb != stcb) { 1371 SCTP_TCB_LOCK(locked_tcb); 1372 } 1373 if (locked_tcb) { 1374 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1375 } 1376 SCTP_INP_WUNLOCK(inp); 1377 SCTP_INP_INFO_RUNLOCK(); 1378 return (stcb); 1379 } 1380 break; 1381 } 1382#ifdef INET6 1383 case AF_INET6: 1384 { 1385 struct sockaddr_in6 *sin6, 1386 *rsin6; 1387 1388 sin6 = (struct sockaddr_in6 *) 1389 &net->ro._l_addr; 1390 rsin6 = (struct sockaddr_in6 *)remote; 1391 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1392 rsin6)) { 1393 /* found it */ 1394 if (netp != NULL) { 1395 *netp = net; 1396 } 1397 if (locked_tcb == NULL) { 1398 SCTP_INP_DECR_REF(inp); 1399 } else if (locked_tcb != stcb) { 1400 SCTP_TCB_LOCK(locked_tcb); 1401 } 1402 if (locked_tcb) { 1403 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1404 } 1405 SCTP_INP_WUNLOCK(inp); 1406 SCTP_INP_INFO_RUNLOCK(); 1407 return (stcb); 1408 } 1409 break; 1410 } 1411#endif 1412 default: 1413 /* TSNH */ 1414 break; 1415 } 1416 } 1417 SCTP_TCB_UNLOCK(stcb); 1418 } 1419 } 1420null_return: 1421 /* clean up for returning null */ 1422 if (locked_tcb) { 1423 SCTP_TCB_LOCK(locked_tcb); 1424 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1425 } 1426 SCTP_INP_WUNLOCK(inp); 1427 SCTP_INP_INFO_RUNLOCK(); 1428 /* not found */ 1429 return (NULL); 1430} 1431 1432/* 1433 * Find an association for a specific endpoint using the association id given 1434 * out in the COMM_UP notification 1435 */ 1436 1437struct sctp_tcb * 1438sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1439{ 1440 /* 1441 * Use my the assoc_id to find a endpoint 1442 */ 1443 struct sctpasochead *head; 1444 struct sctp_tcb *stcb; 1445 uint32_t id; 1446 1447 if (inp == NULL) { 1448 SCTP_PRINTF("TSNH ep_associd\n"); 1449 return (NULL); 1450 } 1451 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1452 SCTP_PRINTF("TSNH ep_associd0\n"); 1453 return (NULL); 1454 } 1455 id = (uint32_t) asoc_id; 1456 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1457 if (head == NULL) { 1458 /* invalid id TSNH */ 1459 SCTP_PRINTF("TSNH ep_associd1\n"); 1460 return (NULL); 1461 } 1462 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1463 if (stcb->asoc.assoc_id == id) { 1464 if (inp != stcb->sctp_ep) { 1465 /* 1466 * some other guy has the same id active (id 1467 * collision ??). 1468 */ 1469 SCTP_PRINTF("TSNH ep_associd2\n"); 1470 continue; 1471 } 1472 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1473 continue; 1474 } 1475 if (want_lock) { 1476 SCTP_TCB_LOCK(stcb); 1477 } 1478 return (stcb); 1479 } 1480 } 1481 return (NULL); 1482} 1483 1484 1485struct sctp_tcb * 1486sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1487{ 1488 struct sctp_tcb *stcb; 1489 1490 SCTP_INP_RLOCK(inp); 1491 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1492 SCTP_INP_RUNLOCK(inp); 1493 return (stcb); 1494} 1495 1496 1497static struct sctp_inpcb * 1498sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1499 uint16_t lport, uint32_t vrf_id) 1500{ 1501 struct sctp_inpcb *inp; 1502 struct sockaddr_in *sin; 1503 1504#ifdef INET6 1505 struct sockaddr_in6 *sin6; 1506 1507#endif 1508 struct sctp_laddr *laddr; 1509 1510#ifdef INET6 1511 struct sockaddr_in6 *intf_addr6; 1512 1513#endif 1514 1515 int fnd; 1516 1517 /* 1518 * Endpoing probe expects that the INP_INFO is locked. 1519 */ 1520 sin = NULL; 1521#ifdef INET6 1522 sin6 = NULL; 1523#endif 1524 switch (nam->sa_family) { 1525 case AF_INET: 1526 sin = (struct sockaddr_in *)nam; 1527 break; 1528#ifdef INET6 1529 case AF_INET6: 1530 sin6 = (struct sockaddr_in6 *)nam; 1531 break; 1532#endif 1533 default: 1534 /* unsupported family */ 1535 return (NULL); 1536 } 1537 1538 if (head == NULL) 1539 return (NULL); 1540 1541 LIST_FOREACH(inp, head, sctp_hash) { 1542 SCTP_INP_RLOCK(inp); 1543 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1544 SCTP_INP_RUNLOCK(inp); 1545 continue; 1546 } 1547 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1548 (inp->sctp_lport == lport)) { 1549 /* got it */ 1550 if ((nam->sa_family == AF_INET) && 1551 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1552 SCTP_IPV6_V6ONLY(inp)) { 1553 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1554 SCTP_INP_RUNLOCK(inp); 1555 continue; 1556 } 1557 /* A V6 address and the endpoint is NOT bound V6 */ 1558 if (nam->sa_family == AF_INET6 && 1559 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1560 SCTP_INP_RUNLOCK(inp); 1561 continue; 1562 } 1563 /* does a VRF id match? */ 1564 fnd = 0; 1565 if (inp->def_vrf_id == vrf_id) 1566 fnd = 1; 1567 1568 SCTP_INP_RUNLOCK(inp); 1569 if (!fnd) 1570 continue; 1571 return (inp); 1572 } 1573 SCTP_INP_RUNLOCK(inp); 1574 } 1575 if ((nam->sa_family == AF_INET) && 1576 (sin->sin_addr.s_addr == INADDR_ANY)) { 1577 /* Can't hunt for one that has no address specified */ 1578 return (NULL); 1579 } 1580#ifdef INET6 1581 if ((nam->sa_family == AF_INET6) && 1582 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 1583 /* Can't hunt for one that has no address specified */ 1584 return (NULL); 1585 } 1586#endif 1587 /* 1588 * ok, not bound to all so see if we can find a EP bound to this 1589 * address. 1590 */ 1591 LIST_FOREACH(inp, head, sctp_hash) { 1592 SCTP_INP_RLOCK(inp); 1593 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1594 SCTP_INP_RUNLOCK(inp); 1595 continue; 1596 } 1597 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1598 SCTP_INP_RUNLOCK(inp); 1599 continue; 1600 } 1601 /* 1602 * Ok this could be a likely candidate, look at all of its 1603 * addresses 1604 */ 1605 if (inp->sctp_lport != lport) { 1606 SCTP_INP_RUNLOCK(inp); 1607 continue; 1608 } 1609 /* does a VRF id match? */ 1610 fnd = 0; 1611 if (inp->def_vrf_id == vrf_id) 1612 fnd = 1; 1613 1614 if (!fnd) { 1615 SCTP_INP_RUNLOCK(inp); 1616 continue; 1617 } 1618 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1619 if (laddr->ifa == NULL) { 1620 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1621 __FUNCTION__); 1622 continue; 1623 } 1624 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1625 laddr->ifa); 1626 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1627 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1628 continue; 1629 } 1630 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1631 /* possible, see if it matches */ 1632 struct sockaddr_in *intf_addr; 1633 1634 intf_addr = &laddr->ifa->address.sin; 1635 switch (nam->sa_family) { 1636 case AF_INET: 1637 if (sin->sin_addr.s_addr == 1638 intf_addr->sin_addr.s_addr) { 1639 SCTP_INP_RUNLOCK(inp); 1640 return (inp); 1641 } 1642 break; 1643#ifdef INET6 1644 case AF_INET6: 1645 intf_addr6 = &laddr->ifa->address.sin6; 1646 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1647 intf_addr6)) { 1648 SCTP_INP_RUNLOCK(inp); 1649 return (inp); 1650 } 1651 break; 1652#endif 1653 } 1654 } 1655 } 1656 SCTP_INP_RUNLOCK(inp); 1657 } 1658 return (NULL); 1659} 1660 1661 1662static struct sctp_inpcb * 1663sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1664{ 1665 struct sctppcbhead *head; 1666 struct sctp_inpcb *t_inp; 1667 int fnd; 1668 1669 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1670 SCTP_BASE_INFO(hashmark))]; 1671 LIST_FOREACH(t_inp, head, sctp_hash) { 1672 if (t_inp->sctp_lport != lport) { 1673 continue; 1674 } 1675 /* is it in the VRF in question */ 1676 fnd = 0; 1677 if (t_inp->def_vrf_id == vrf_id) 1678 fnd = 1; 1679 if (!fnd) 1680 continue; 1681 1682 /* This one is in use. */ 1683 /* check the v6/v4 binding issue */ 1684 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1685 SCTP_IPV6_V6ONLY(t_inp)) { 1686 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1687 /* collision in V6 space */ 1688 return (t_inp); 1689 } else { 1690 /* inp is BOUND_V4 no conflict */ 1691 continue; 1692 } 1693 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1694 /* t_inp is bound v4 and v6, conflict always */ 1695 return (t_inp); 1696 } else { 1697 /* t_inp is bound only V4 */ 1698 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1699 SCTP_IPV6_V6ONLY(inp)) { 1700 /* no conflict */ 1701 continue; 1702 } 1703 /* else fall through to conflict */ 1704 } 1705 return (t_inp); 1706 } 1707 return (NULL); 1708} 1709 1710 1711int 1712sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1713{ 1714 /* For 1-2-1 with port reuse */ 1715 struct sctppcbhead *head; 1716 struct sctp_inpcb *tinp; 1717 1718 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1719 /* only works with port reuse on */ 1720 return (-1); 1721 } 1722 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1723 return (0); 1724 } 1725 SCTP_INP_RUNLOCK(inp); 1726 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1727 SCTP_BASE_INFO(hashmark))]; 1728 /* Kick out all non-listeners to the TCP hash */ 1729 LIST_FOREACH(tinp, head, sctp_hash) { 1730 if (tinp->sctp_lport != inp->sctp_lport) { 1731 continue; 1732 } 1733 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1734 continue; 1735 } 1736 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1737 continue; 1738 } 1739 if (tinp->sctp_socket->so_qlimit) { 1740 continue; 1741 } 1742 SCTP_INP_WLOCK(tinp); 1743 LIST_REMOVE(tinp, sctp_hash); 1744 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1745 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1746 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1747 SCTP_INP_WUNLOCK(tinp); 1748 } 1749 SCTP_INP_WLOCK(inp); 1750 /* Pull from where he was */ 1751 LIST_REMOVE(inp, sctp_hash); 1752 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1753 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1754 LIST_INSERT_HEAD(head, inp, sctp_hash); 1755 SCTP_INP_WUNLOCK(inp); 1756 SCTP_INP_RLOCK(inp); 1757 return (0); 1758} 1759 1760 1761struct sctp_inpcb * 1762sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1763 uint32_t vrf_id) 1764{ 1765 /* 1766 * First we check the hash table to see if someone has this port 1767 * bound with just the port. 1768 */ 1769 struct sctp_inpcb *inp; 1770 struct sctppcbhead *head; 1771 struct sockaddr_in *sin; 1772 struct sockaddr_in6 *sin6; 1773 int lport; 1774 1775 if (nam->sa_family == AF_INET) { 1776 sin = (struct sockaddr_in *)nam; 1777 lport = ((struct sockaddr_in *)nam)->sin_port; 1778 } else if (nam->sa_family == AF_INET6) { 1779 sin6 = (struct sockaddr_in6 *)nam; 1780 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1781 } else { 1782 /* unsupported family */ 1783 return (NULL); 1784 } 1785 /* 1786 * I could cheat here and just cast to one of the types but we will 1787 * do it right. It also provides the check against an Unsupported 1788 * type too. 1789 */ 1790 /* Find the head of the ALLADDR chain */ 1791 if (have_lock == 0) { 1792 SCTP_INP_INFO_RLOCK(); 1793 } 1794 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1795 SCTP_BASE_INFO(hashmark))]; 1796 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1797 1798 /* 1799 * If the TCP model exists it could be that the main listening 1800 * endpoint is gone but there exists a connected socket for this guy 1801 * yet. If so we can return the first one that we find. This may NOT 1802 * be the correct one so the caller should be wary on the return 1803 * INP. Currently the onlyc caller that sets this flag is in bindx 1804 * where we are verifying that a user CAN bind the address. He 1805 * either has bound it already, or someone else has, or its open to 1806 * bind, so this is good enough. 1807 */ 1808 if (inp == NULL && find_tcp_pool) { 1809 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 1810 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1811 } 1812 if (inp) { 1813 SCTP_INP_INCR_REF(inp); 1814 } 1815 if (have_lock == 0) { 1816 SCTP_INP_INFO_RUNLOCK(); 1817 } 1818 return (inp); 1819} 1820 1821/* 1822 * Find an association for an endpoint with the pointer to whom you want to 1823 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1824 * need to change the *to to some other struct like a mbuf... 1825 */ 1826struct sctp_tcb * 1827sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1828 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1829 uint32_t vrf_id) 1830{ 1831 struct sctp_inpcb *inp = NULL; 1832 struct sctp_tcb *retval; 1833 1834 SCTP_INP_INFO_RLOCK(); 1835 if (find_tcp_pool) { 1836 if (inp_p != NULL) { 1837 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1838 vrf_id); 1839 } else { 1840 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1841 vrf_id); 1842 } 1843 if (retval != NULL) { 1844 SCTP_INP_INFO_RUNLOCK(); 1845 return (retval); 1846 } 1847 } 1848 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1849 if (inp_p != NULL) { 1850 *inp_p = inp; 1851 } 1852 SCTP_INP_INFO_RUNLOCK(); 1853 1854 if (inp == NULL) { 1855 return (NULL); 1856 } 1857 /* 1858 * ok, we have an endpoint, now lets find the assoc for it (if any) 1859 * we now place the source address or from in the to of the find 1860 * endpoint call. Since in reality this chain is used from the 1861 * inbound packet side. 1862 */ 1863 if (inp_p != NULL) { 1864 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1865 NULL); 1866 } else { 1867 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1868 NULL); 1869 } 1870 return retval; 1871} 1872 1873 1874/* 1875 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1876 * find all addresses that the sender has specified in any address list. Each 1877 * address will be used to lookup the TCB and see if one exits. 1878 */ 1879static struct sctp_tcb * 1880sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1881 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1882 struct sockaddr *dest) 1883{ 1884 struct sockaddr_in sin4; 1885 struct sockaddr_in6 sin6; 1886 struct sctp_paramhdr *phdr, parm_buf; 1887 struct sctp_tcb *retval; 1888 uint32_t ptype, plen; 1889 1890 memset(&sin4, 0, sizeof(sin4)); 1891 memset(&sin6, 0, sizeof(sin6)); 1892 sin4.sin_len = sizeof(sin4); 1893 sin4.sin_family = AF_INET; 1894 sin4.sin_port = sh->src_port; 1895 sin6.sin6_len = sizeof(sin6); 1896 sin6.sin6_family = AF_INET6; 1897 sin6.sin6_port = sh->src_port; 1898 1899 retval = NULL; 1900 offset += sizeof(struct sctp_init_chunk); 1901 1902 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1903 while (phdr != NULL) { 1904 /* now we must see if we want the parameter */ 1905 ptype = ntohs(phdr->param_type); 1906 plen = ntohs(phdr->param_length); 1907 if (plen == 0) { 1908 break; 1909 } 1910 if (ptype == SCTP_IPV4_ADDRESS && 1911 plen == sizeof(struct sctp_ipv4addr_param)) { 1912 /* Get the rest of the address */ 1913 struct sctp_ipv4addr_param ip4_parm, *p4; 1914 1915 phdr = sctp_get_next_param(m, offset, 1916 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1917 if (phdr == NULL) { 1918 return (NULL); 1919 } 1920 p4 = (struct sctp_ipv4addr_param *)phdr; 1921 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 1922 /* look it up */ 1923 retval = sctp_findassociation_ep_addr(inp_p, 1924 (struct sockaddr *)&sin4, netp, dest, NULL); 1925 if (retval != NULL) { 1926 return (retval); 1927 } 1928 } else if (ptype == SCTP_IPV6_ADDRESS && 1929 plen == sizeof(struct sctp_ipv6addr_param)) { 1930 /* Get the rest of the address */ 1931 struct sctp_ipv6addr_param ip6_parm, *p6; 1932 1933 phdr = sctp_get_next_param(m, offset, 1934 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 1935 if (phdr == NULL) { 1936 return (NULL); 1937 } 1938 p6 = (struct sctp_ipv6addr_param *)phdr; 1939 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 1940 /* look it up */ 1941 retval = sctp_findassociation_ep_addr(inp_p, 1942 (struct sockaddr *)&sin6, netp, dest, NULL); 1943 if (retval != NULL) { 1944 return (retval); 1945 } 1946 } 1947 offset += SCTP_SIZE32(plen); 1948 phdr = sctp_get_next_param(m, offset, &parm_buf, 1949 sizeof(parm_buf)); 1950 } 1951 return (NULL); 1952} 1953 1954static struct sctp_tcb * 1955sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 1956 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 1957 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 1958{ 1959 /* 1960 * Use my vtag to hash. If we find it we then verify the source addr 1961 * is in the assoc. If all goes well we save a bit on rec of a 1962 * packet. 1963 */ 1964 struct sctpasochead *head; 1965 struct sctp_nets *net; 1966 struct sctp_tcb *stcb; 1967 1968 *netp = NULL; 1969 *inp_p = NULL; 1970 SCTP_INP_INFO_RLOCK(); 1971 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 1972 SCTP_BASE_INFO(hashasocmark))]; 1973 if (head == NULL) { 1974 /* invalid vtag */ 1975 SCTP_INP_INFO_RUNLOCK(); 1976 return (NULL); 1977 } 1978 LIST_FOREACH(stcb, head, sctp_asocs) { 1979 SCTP_INP_RLOCK(stcb->sctp_ep); 1980 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1981 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1982 continue; 1983 } 1984 SCTP_TCB_LOCK(stcb); 1985 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1986 if (stcb->asoc.my_vtag == vtag) { 1987 /* candidate */ 1988 if (stcb->rport != rport) { 1989 SCTP_TCB_UNLOCK(stcb); 1990 continue; 1991 } 1992 if (stcb->sctp_ep->sctp_lport != lport) { 1993 SCTP_TCB_UNLOCK(stcb); 1994 continue; 1995 } 1996 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1997 SCTP_TCB_UNLOCK(stcb); 1998 continue; 1999 } 2000 /* RRS:Need toaddr check here */ 2001 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2002 /* Endpoint does not own this address */ 2003 SCTP_TCB_UNLOCK(stcb); 2004 continue; 2005 } 2006 if (remote_tag) { 2007 /* 2008 * If we have both vtags thats all we match 2009 * on 2010 */ 2011 if (stcb->asoc.peer_vtag == remote_tag) { 2012 /* 2013 * If both tags match we consider it 2014 * conclusive and check NO 2015 * source/destination addresses 2016 */ 2017 goto conclusive; 2018 } 2019 } 2020 if (skip_src_check) { 2021 conclusive: 2022 if (from) { 2023 net = sctp_findnet(stcb, from); 2024 } else { 2025 *netp = NULL; /* unknown */ 2026 } 2027 if (inp_p) 2028 *inp_p = stcb->sctp_ep; 2029 SCTP_INP_INFO_RUNLOCK(); 2030 return (stcb); 2031 } 2032 net = sctp_findnet(stcb, from); 2033 if (net) { 2034 /* yep its him. */ 2035 *netp = net; 2036 SCTP_STAT_INCR(sctps_vtagexpress); 2037 *inp_p = stcb->sctp_ep; 2038 SCTP_INP_INFO_RUNLOCK(); 2039 return (stcb); 2040 } else { 2041 /* 2042 * not him, this should only happen in rare 2043 * cases so I peg it. 2044 */ 2045 SCTP_STAT_INCR(sctps_vtagbogus); 2046 } 2047 } 2048 SCTP_TCB_UNLOCK(stcb); 2049 } 2050 SCTP_INP_INFO_RUNLOCK(); 2051 return (NULL); 2052} 2053 2054/* 2055 * Find an association with the pointer to the inbound IP packet. This can be 2056 * a IPv4 or IPv6 packet. 2057 */ 2058struct sctp_tcb * 2059sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 2060 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2061 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2062{ 2063 int find_tcp_pool; 2064 struct ip *iph; 2065 struct sctp_tcb *retval; 2066 struct sockaddr_storage to_store, from_store; 2067 struct sockaddr *to = (struct sockaddr *)&to_store; 2068 struct sockaddr *from = (struct sockaddr *)&from_store; 2069 struct sctp_inpcb *inp; 2070 2071 iph = mtod(m, struct ip *); 2072 switch (iph->ip_v) { 2073 case IPVERSION: 2074 { 2075 /* its IPv4 */ 2076 struct sockaddr_in *from4; 2077 2078 from4 = (struct sockaddr_in *)&from_store; 2079 bzero(from4, sizeof(*from4)); 2080 from4->sin_family = AF_INET; 2081 from4->sin_len = sizeof(struct sockaddr_in); 2082 from4->sin_addr.s_addr = iph->ip_src.s_addr; 2083 from4->sin_port = sh->src_port; 2084 break; 2085 } 2086#ifdef INET6 2087 case IPV6_VERSION >> 4: 2088 { 2089 /* its IPv6 */ 2090 struct ip6_hdr *ip6; 2091 struct sockaddr_in6 *from6; 2092 2093 ip6 = mtod(m, struct ip6_hdr *); 2094 from6 = (struct sockaddr_in6 *)&from_store; 2095 bzero(from6, sizeof(*from6)); 2096 from6->sin6_family = AF_INET6; 2097 from6->sin6_len = sizeof(struct sockaddr_in6); 2098 from6->sin6_addr = ip6->ip6_src; 2099 from6->sin6_port = sh->src_port; 2100 /* Get the scopes in properly to the sin6 addr's */ 2101 /* we probably don't need these operations */ 2102 (void)sa6_recoverscope(from6); 2103 sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone)); 2104 break; 2105 } 2106#endif 2107 default: 2108 /* Currently not supported. */ 2109 return (NULL); 2110 } 2111 2112 2113 switch (iph->ip_v) { 2114 case IPVERSION: 2115 { 2116 /* its IPv4 */ 2117 struct sockaddr_in *to4; 2118 2119 to4 = (struct sockaddr_in *)&to_store; 2120 bzero(to4, sizeof(*to4)); 2121 to4->sin_family = AF_INET; 2122 to4->sin_len = sizeof(struct sockaddr_in); 2123 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 2124 to4->sin_port = sh->dest_port; 2125 break; 2126 } 2127#ifdef INET6 2128 case IPV6_VERSION >> 4: 2129 { 2130 /* its IPv6 */ 2131 struct ip6_hdr *ip6; 2132 struct sockaddr_in6 *to6; 2133 2134 ip6 = mtod(m, struct ip6_hdr *); 2135 to6 = (struct sockaddr_in6 *)&to_store; 2136 bzero(to6, sizeof(*to6)); 2137 to6->sin6_family = AF_INET6; 2138 to6->sin6_len = sizeof(struct sockaddr_in6); 2139 to6->sin6_addr = ip6->ip6_dst; 2140 to6->sin6_port = sh->dest_port; 2141 /* Get the scopes in properly to the sin6 addr's */ 2142 /* we probably don't need these operations */ 2143 (void)sa6_recoverscope(to6); 2144 sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone)); 2145 break; 2146 } 2147#endif 2148 default: 2149 /* TSNH */ 2150 break; 2151 } 2152 if (sh->v_tag) { 2153 /* we only go down this path if vtag is non-zero */ 2154 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag), 2155 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2156 if (retval) { 2157 return (retval); 2158 } 2159 } 2160 find_tcp_pool = 0; 2161 if ((ch->chunk_type != SCTP_INITIATION) && 2162 (ch->chunk_type != SCTP_INITIATION_ACK) && 2163 (ch->chunk_type != SCTP_COOKIE_ACK) && 2164 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2165 /* Other chunk types go to the tcp pool. */ 2166 find_tcp_pool = 1; 2167 } 2168 if (inp_p) { 2169 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 2170 find_tcp_pool, vrf_id); 2171 inp = *inp_p; 2172 } else { 2173 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 2174 find_tcp_pool, vrf_id); 2175 } 2176 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2177 if (retval == NULL && inp) { 2178 /* Found a EP but not this address */ 2179 if ((ch->chunk_type == SCTP_INITIATION) || 2180 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2181 /*- 2182 * special hook, we do NOT return linp or an 2183 * association that is linked to an existing 2184 * association that is under the TCP pool (i.e. no 2185 * listener exists). The endpoint finding routine 2186 * will always find a listner before examining the 2187 * TCP pool. 2188 */ 2189 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2190 if (inp_p) { 2191 *inp_p = NULL; 2192 } 2193 return (NULL); 2194 } 2195 retval = sctp_findassociation_special_addr(m, iphlen, 2196 offset, sh, &inp, netp, to); 2197 if (inp_p != NULL) { 2198 *inp_p = inp; 2199 } 2200 } 2201 } 2202 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2203 return (retval); 2204} 2205 2206/* 2207 * lookup an association by an ASCONF lookup address. 2208 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2209 */ 2210struct sctp_tcb * 2211sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 2212 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2213{ 2214 struct sctp_tcb *stcb; 2215 struct sockaddr_in *sin; 2216 2217#ifdef INET6 2218 struct sockaddr_in6 *sin6; 2219 2220#endif 2221 struct sockaddr_storage local_store, remote_store; 2222 struct sockaddr *to; 2223 struct ip *iph; 2224 2225#ifdef INET6 2226 struct ip6_hdr *ip6; 2227 2228#endif 2229 struct sctp_paramhdr parm_buf, *phdr; 2230 int ptype; 2231 int zero_address = 0; 2232 2233 2234 memset(&local_store, 0, sizeof(local_store)); 2235 memset(&remote_store, 0, sizeof(remote_store)); 2236 to = (struct sockaddr *)&local_store; 2237 /* First get the destination address setup too. */ 2238 iph = mtod(m, struct ip *); 2239 switch (iph->ip_v) { 2240 case IPVERSION: 2241 /* its IPv4 */ 2242 sin = (struct sockaddr_in *)&local_store; 2243 sin->sin_family = AF_INET; 2244 sin->sin_len = sizeof(*sin); 2245 sin->sin_port = sh->dest_port; 2246 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 2247 break; 2248#ifdef INET6 2249 case IPV6_VERSION >> 4: 2250 /* its IPv6 */ 2251 ip6 = mtod(m, struct ip6_hdr *); 2252 sin6 = (struct sockaddr_in6 *)&local_store; 2253 sin6->sin6_family = AF_INET6; 2254 sin6->sin6_len = sizeof(*sin6); 2255 sin6->sin6_port = sh->dest_port; 2256 sin6->sin6_addr = ip6->ip6_dst; 2257 break; 2258#endif 2259 default: 2260 return NULL; 2261 } 2262 2263 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2264 &parm_buf, sizeof(struct sctp_paramhdr)); 2265 if (phdr == NULL) { 2266 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2267 __FUNCTION__); 2268 return NULL; 2269 } 2270 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2271 /* get the correlation address */ 2272 switch (ptype) { 2273#ifdef INET6 2274 case SCTP_IPV6_ADDRESS: 2275 { 2276 /* ipv6 address param */ 2277 struct sctp_ipv6addr_param *p6, p6_buf; 2278 2279 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2280 return NULL; 2281 } 2282 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2283 offset + sizeof(struct sctp_asconf_chunk), 2284 &p6_buf.ph, sizeof(*p6)); 2285 if (p6 == NULL) { 2286 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2287 __FUNCTION__); 2288 return (NULL); 2289 } 2290 sin6 = (struct sockaddr_in6 *)&remote_store; 2291 sin6->sin6_family = AF_INET6; 2292 sin6->sin6_len = sizeof(*sin6); 2293 sin6->sin6_port = sh->src_port; 2294 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2295 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2296 zero_address = 1; 2297 break; 2298 } 2299#endif 2300 case SCTP_IPV4_ADDRESS: 2301 { 2302 /* ipv4 address param */ 2303 struct sctp_ipv4addr_param *p4, p4_buf; 2304 2305 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2306 return NULL; 2307 } 2308 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2309 offset + sizeof(struct sctp_asconf_chunk), 2310 &p4_buf.ph, sizeof(*p4)); 2311 if (p4 == NULL) { 2312 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2313 __FUNCTION__); 2314 return (NULL); 2315 } 2316 sin = (struct sockaddr_in *)&remote_store; 2317 sin->sin_family = AF_INET; 2318 sin->sin_len = sizeof(*sin); 2319 sin->sin_port = sh->src_port; 2320 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2321 if (sin->sin_addr.s_addr == INADDR_ANY) 2322 zero_address = 1; 2323 break; 2324 } 2325 default: 2326 /* invalid address param type */ 2327 return NULL; 2328 } 2329 2330 if (zero_address) { 2331 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p, 2332 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2333 /* 2334 * printf("findassociation_ep_asconf: zero lookup address 2335 * finds stcb 0x%x\n", (uint32_t)stcb); 2336 */ 2337 } else { 2338 stcb = sctp_findassociation_ep_addr(inp_p, 2339 (struct sockaddr *)&remote_store, netp, 2340 to, NULL); 2341 } 2342 return (stcb); 2343} 2344 2345 2346/* 2347 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2348 * addresses. This way if we don't get a bind we by default pick a ephemeral 2349 * port with all addresses bound. 2350 */ 2351int 2352sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2353{ 2354 /* 2355 * we get called when a new endpoint starts up. We need to allocate 2356 * the sctp_inpcb structure from the zone and init it. Mark it as 2357 * unbound and find a port that we can use as an ephemeral with 2358 * INADDR_ANY. If the user binds later no problem we can then add in 2359 * the specific addresses. And setup the default parameters for the 2360 * EP. 2361 */ 2362 int i, error; 2363 struct sctp_inpcb *inp; 2364 struct sctp_pcb *m; 2365 struct timeval time; 2366 sctp_sharedkey_t *null_key; 2367 2368 error = 0; 2369 2370 SCTP_INP_INFO_WLOCK(); 2371 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2372 if (inp == NULL) { 2373 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2374 SCTP_INP_INFO_WUNLOCK(); 2375 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2376 return (ENOBUFS); 2377 } 2378 /* zap it */ 2379 bzero(inp, sizeof(*inp)); 2380 2381 /* bump generations */ 2382 /* setup socket pointers */ 2383 inp->sctp_socket = so; 2384 inp->ip_inp.inp.inp_socket = so; 2385 inp->sctp_associd_counter = 1; 2386 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2387 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2388 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2389 /* init the small hash table we use to track asocid <-> tcb */ 2390 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2391 if (inp->sctp_asocidhash == NULL) { 2392 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2393 SCTP_INP_INFO_WUNLOCK(); 2394 return (ENOBUFS); 2395 } 2396#ifdef IPSEC 2397 { 2398 struct inpcbpolicy *pcb_sp = NULL; 2399 2400 error = ipsec_init_policy(so, &pcb_sp); 2401 /* Arrange to share the policy */ 2402 inp->ip_inp.inp.inp_sp = pcb_sp; 2403 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2404 } 2405 if (error != 0) { 2406 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2407 SCTP_INP_INFO_WUNLOCK(); 2408 return error; 2409 } 2410#endif /* IPSEC */ 2411 SCTP_INCR_EP_COUNT(); 2412 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2413 SCTP_INP_INFO_WUNLOCK(); 2414 2415 so->so_pcb = (caddr_t)inp; 2416 2417 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 2418 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 2419 /* UDP style socket */ 2420 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2421 SCTP_PCB_FLAGS_UNBOUND); 2422 /* Be sure it is NON-BLOCKING IO for UDP */ 2423 /* SCTP_SET_SO_NBIO(so); */ 2424 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2425 /* TCP style socket */ 2426 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2427 SCTP_PCB_FLAGS_UNBOUND); 2428 /* Be sure we have blocking IO by default */ 2429 SCTP_CLEAR_SO_NBIO(so); 2430 } else { 2431 /* 2432 * unsupported socket type (RAW, etc)- in case we missed it 2433 * in protosw 2434 */ 2435 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2436 so->so_pcb = NULL; 2437 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2438 return (EOPNOTSUPP); 2439 } 2440 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2441 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2442 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2443 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2444 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2445 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2446 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2447 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2448 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2449 } 2450 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2451 &inp->sctp_hashmark); 2452 if (inp->sctp_tcbhash == NULL) { 2453 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2454 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2455 so->so_pcb = NULL; 2456 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2457 return (ENOBUFS); 2458 } 2459 inp->def_vrf_id = vrf_id; 2460 2461 SCTP_INP_INFO_WLOCK(); 2462 SCTP_INP_LOCK_INIT(inp); 2463 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2464 SCTP_INP_READ_INIT(inp); 2465 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2466 /* lock the new ep */ 2467 SCTP_INP_WLOCK(inp); 2468 2469 /* add it to the info area */ 2470 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2471 SCTP_INP_INFO_WUNLOCK(); 2472 2473 TAILQ_INIT(&inp->read_queue); 2474 LIST_INIT(&inp->sctp_addr_list); 2475 2476 LIST_INIT(&inp->sctp_asoc_list); 2477 2478#ifdef SCTP_TRACK_FREED_ASOCS 2479 /* TEMP CODE */ 2480 LIST_INIT(&inp->sctp_asoc_free_list); 2481#endif 2482 /* Init the timer structure for signature change */ 2483 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2484 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2485 2486 /* now init the actual endpoint default data */ 2487 m = &inp->sctp_ep; 2488 2489 /* setup the base timeout information */ 2490 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2491 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2492 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2493 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2494 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2495 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2496 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2497 /* all max/min max are in ms */ 2498 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2499 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2500 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2501 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2502 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2503 2504 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2505 2506 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2507 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2508 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2509 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2510 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2511 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2512 if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) && 2513 (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) { 2514 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2515 } else { 2516 /* sysctl done with invalid value, set to 2581 */ 2517 m->sctp_default_cc_module = SCTP_CC_RFC2581; 2518 } 2519 /* number of streams to pre-open on a association */ 2520 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2521 2522 /* Add adaptation cookie */ 2523 m->adaptation_layer_indicator = 0x504C5253; 2524 2525 /* seed random number generator */ 2526 m->random_counter = 1; 2527 m->store_at = SCTP_SIGNATURE_SIZE; 2528 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2529 sctp_fill_random_store(m); 2530 2531 /* Minimum cookie size */ 2532 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2533 sizeof(struct sctp_state_cookie); 2534 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2535 2536 /* Setup the initial secret */ 2537 (void)SCTP_GETTIME_TIMEVAL(&time); 2538 m->time_of_secret_change = time.tv_sec; 2539 2540 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2541 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2542 } 2543 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2544 2545 /* How long is a cookie good for ? */ 2546 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2547 /* 2548 * Initialize authentication parameters 2549 */ 2550 m->local_hmacs = sctp_default_supported_hmaclist(); 2551 m->local_auth_chunks = sctp_alloc_chunklist(); 2552 sctp_auth_set_default_chunks(m->local_auth_chunks); 2553 LIST_INIT(&m->shared_keys); 2554 /* add default NULL key as key id 0 */ 2555 null_key = sctp_alloc_sharedkey(); 2556 sctp_insert_sharedkey(&m->shared_keys, null_key); 2557 SCTP_INP_WUNLOCK(inp); 2558#ifdef SCTP_LOG_CLOSING 2559 sctp_log_closing(inp, NULL, 12); 2560#endif 2561 return (error); 2562} 2563 2564 2565void 2566sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2567 struct sctp_tcb *stcb) 2568{ 2569 struct sctp_nets *net; 2570 uint16_t lport, rport; 2571 struct sctppcbhead *head; 2572 struct sctp_laddr *laddr, *oladdr; 2573 2574 atomic_add_int(&stcb->asoc.refcnt, 1); 2575 SCTP_TCB_UNLOCK(stcb); 2576 SCTP_INP_INFO_WLOCK(); 2577 SCTP_INP_WLOCK(old_inp); 2578 SCTP_INP_WLOCK(new_inp); 2579 SCTP_TCB_LOCK(stcb); 2580 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2581 2582 new_inp->sctp_ep.time_of_secret_change = 2583 old_inp->sctp_ep.time_of_secret_change; 2584 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2585 sizeof(old_inp->sctp_ep.secret_key)); 2586 new_inp->sctp_ep.current_secret_number = 2587 old_inp->sctp_ep.current_secret_number; 2588 new_inp->sctp_ep.last_secret_number = 2589 old_inp->sctp_ep.last_secret_number; 2590 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2591 2592 /* make it so new data pours into the new socket */ 2593 stcb->sctp_socket = new_inp->sctp_socket; 2594 stcb->sctp_ep = new_inp; 2595 2596 /* Copy the port across */ 2597 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2598 rport = stcb->rport; 2599 /* Pull the tcb from the old association */ 2600 LIST_REMOVE(stcb, sctp_tcbhash); 2601 LIST_REMOVE(stcb, sctp_tcblist); 2602 if (stcb->asoc.in_asocid_hash) { 2603 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2604 } 2605 /* Now insert the new_inp into the TCP connected hash */ 2606 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), 2607 SCTP_BASE_INFO(hashtcpmark))]; 2608 2609 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2610 /* Its safe to access */ 2611 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2612 2613 /* Now move the tcb into the endpoint list */ 2614 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2615 /* 2616 * Question, do we even need to worry about the ep-hash since we 2617 * only have one connection? Probably not :> so lets get rid of it 2618 * and not suck up any kernel memory in that. 2619 */ 2620 if (stcb->asoc.in_asocid_hash) { 2621 struct sctpasochead *lhd; 2622 2623 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2624 new_inp->hashasocidmark)]; 2625 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2626 } 2627 /* Ok. Let's restart timer. */ 2628 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2629 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2630 stcb, net); 2631 } 2632 2633 SCTP_INP_INFO_WUNLOCK(); 2634 if (new_inp->sctp_tcbhash != NULL) { 2635 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2636 new_inp->sctp_tcbhash = NULL; 2637 } 2638 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2639 /* Subset bound, so copy in the laddr list from the old_inp */ 2640 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2641 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2642 if (laddr == NULL) { 2643 /* 2644 * Gak, what can we do? This assoc is really 2645 * HOSED. We probably should send an abort 2646 * here. 2647 */ 2648 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2649 continue; 2650 } 2651 SCTP_INCR_LADDR_COUNT(); 2652 bzero(laddr, sizeof(*laddr)); 2653 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2654 laddr->ifa = oladdr->ifa; 2655 atomic_add_int(&laddr->ifa->refcount, 1); 2656 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2657 sctp_nxt_addr); 2658 new_inp->laddr_count++; 2659 } 2660 } 2661 /* 2662 * Now any running timers need to be adjusted since we really don't 2663 * care if they are running or not just blast in the new_inp into 2664 * all of them. 2665 */ 2666 2667 stcb->asoc.hb_timer.ep = (void *)new_inp; 2668 stcb->asoc.dack_timer.ep = (void *)new_inp; 2669 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2670 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2671 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2672 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2673 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2674 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2675 /* now what about the nets? */ 2676 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2677 net->pmtu_timer.ep = (void *)new_inp; 2678 net->rxt_timer.ep = (void *)new_inp; 2679 net->fr_timer.ep = (void *)new_inp; 2680 } 2681 SCTP_INP_WUNLOCK(new_inp); 2682 SCTP_INP_WUNLOCK(old_inp); 2683} 2684 2685 2686 2687 2688/* sctp_ifap is used to bypass normal local address validation checks */ 2689int 2690sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2691 struct sctp_ifa *sctp_ifap, struct thread *p) 2692{ 2693 /* bind a ep to a socket address */ 2694 struct sctppcbhead *head; 2695 struct sctp_inpcb *inp, *inp_tmp; 2696 struct inpcb *ip_inp; 2697 int port_reuse_active = 0; 2698 int bindall; 2699 uint16_t lport; 2700 int error; 2701 uint32_t vrf_id; 2702 2703 lport = 0; 2704 error = 0; 2705 bindall = 1; 2706 inp = (struct sctp_inpcb *)so->so_pcb; 2707 ip_inp = (struct inpcb *)so->so_pcb; 2708#ifdef SCTP_DEBUG 2709 if (addr) { 2710 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2711 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2712 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2713 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2714 } 2715#endif 2716 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2717 /* already did a bind, subsequent binds NOT allowed ! */ 2718 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2719 return (EINVAL); 2720 } 2721#ifdef INVARIANTS 2722 if (p == NULL) 2723 panic("null proc/thread"); 2724#endif 2725 if (addr != NULL) { 2726 switch (addr->sa_family) { 2727 case AF_INET: 2728 { 2729 struct sockaddr_in *sin; 2730 2731 /* IPV6_V6ONLY socket? */ 2732 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2733 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2734 return (EINVAL); 2735 } 2736 if (addr->sa_len != sizeof(*sin)) { 2737 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2738 return (EINVAL); 2739 } 2740 sin = (struct sockaddr_in *)addr; 2741 lport = sin->sin_port; 2742 /* 2743 * For LOOPBACK the prison_local_ip4() call 2744 * will transmute the ip address to the 2745 * proper value. 2746 */ 2747 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2748 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2749 return (error); 2750 } 2751 if (sin->sin_addr.s_addr != INADDR_ANY) { 2752 bindall = 0; 2753 } 2754 break; 2755 } 2756#ifdef INET6 2757 case AF_INET6: 2758 { 2759 /* 2760 * Only for pure IPv6 Address. (No IPv4 2761 * Mapped!) 2762 */ 2763 struct sockaddr_in6 *sin6; 2764 2765 sin6 = (struct sockaddr_in6 *)addr; 2766 2767 if (addr->sa_len != sizeof(*sin6)) { 2768 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2769 return (EINVAL); 2770 } 2771 lport = sin6->sin6_port; 2772 2773 /* 2774 * For LOOPBACK the prison_local_ip6() call 2775 * will transmute the ipv6 address to the 2776 * proper value. 2777 */ 2778 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2779 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2780 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2781 return (error); 2782 } 2783 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2784 bindall = 0; 2785 /* KAME hack: embed scopeid */ 2786 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2787 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2788 return (EINVAL); 2789 } 2790 } 2791 /* this must be cleared for ifa_ifwithaddr() */ 2792 sin6->sin6_scope_id = 0; 2793 break; 2794 } 2795#endif 2796 default: 2797 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2798 return (EAFNOSUPPORT); 2799 } 2800 } 2801 SCTP_INP_INFO_WLOCK(); 2802 SCTP_INP_WLOCK(inp); 2803 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2804 vrf_id = inp->def_vrf_id; 2805 2806 /* increase our count due to the unlock we do */ 2807 SCTP_INP_INCR_REF(inp); 2808 if (lport) { 2809 /* 2810 * Did the caller specify a port? if so we must see if a ep 2811 * already has this one bound. 2812 */ 2813 /* got to be root to get at low ports */ 2814 if (ntohs(lport) < IPPORT_RESERVED) { 2815 if (p && (error = 2816 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2817 )) { 2818 SCTP_INP_DECR_REF(inp); 2819 SCTP_INP_WUNLOCK(inp); 2820 SCTP_INP_INFO_WUNLOCK(); 2821 return (error); 2822 } 2823 } 2824 if (p == NULL) { 2825 SCTP_INP_DECR_REF(inp); 2826 SCTP_INP_WUNLOCK(inp); 2827 SCTP_INP_INFO_WUNLOCK(); 2828 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2829 return (error); 2830 } 2831 SCTP_INP_WUNLOCK(inp); 2832 if (bindall) { 2833 vrf_id = inp->def_vrf_id; 2834 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2835 if (inp_tmp != NULL) { 2836 /* 2837 * lock guy returned and lower count note 2838 * that we are not bound so inp_tmp should 2839 * NEVER be inp. And it is this inp 2840 * (inp_tmp) that gets the reference bump, 2841 * so we must lower it. 2842 */ 2843 SCTP_INP_DECR_REF(inp_tmp); 2844 /* unlock info */ 2845 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2846 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2847 /* 2848 * Ok, must be one-2-one and 2849 * allowing port re-use 2850 */ 2851 port_reuse_active = 1; 2852 goto continue_anyway; 2853 } 2854 SCTP_INP_DECR_REF(inp); 2855 SCTP_INP_INFO_WUNLOCK(); 2856 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2857 return (EADDRINUSE); 2858 } 2859 } else { 2860 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2861 if (inp_tmp != NULL) { 2862 /* 2863 * lock guy returned and lower count note 2864 * that we are not bound so inp_tmp should 2865 * NEVER be inp. And it is this inp 2866 * (inp_tmp) that gets the reference bump, 2867 * so we must lower it. 2868 */ 2869 SCTP_INP_DECR_REF(inp_tmp); 2870 /* unlock info */ 2871 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2872 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2873 /* 2874 * Ok, must be one-2-one and 2875 * allowing port re-use 2876 */ 2877 port_reuse_active = 1; 2878 goto continue_anyway; 2879 } 2880 SCTP_INP_DECR_REF(inp); 2881 SCTP_INP_INFO_WUNLOCK(); 2882 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2883 return (EADDRINUSE); 2884 } 2885 } 2886continue_anyway: 2887 SCTP_INP_WLOCK(inp); 2888 if (bindall) { 2889 /* verify that no lport is not used by a singleton */ 2890 if ((port_reuse_active == 0) && 2891 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2892 ) { 2893 /* Sorry someone already has this one bound */ 2894 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2895 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2896 port_reuse_active = 1; 2897 } else { 2898 SCTP_INP_DECR_REF(inp); 2899 SCTP_INP_WUNLOCK(inp); 2900 SCTP_INP_INFO_WUNLOCK(); 2901 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2902 return (EADDRINUSE); 2903 } 2904 } 2905 } 2906 } else { 2907 uint16_t first, last, candidate; 2908 uint16_t count; 2909 int done; 2910 2911 if (ip_inp->inp_flags & INP_HIGHPORT) { 2912 first = MODULE_GLOBAL(ipport_hifirstauto); 2913 last = MODULE_GLOBAL(ipport_hilastauto); 2914 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2915 if (p && (error = 2916 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2917 )) { 2918 SCTP_INP_DECR_REF(inp); 2919 SCTP_INP_WUNLOCK(inp); 2920 SCTP_INP_INFO_WUNLOCK(); 2921 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2922 return (error); 2923 } 2924 first = MODULE_GLOBAL(ipport_lowfirstauto); 2925 last = MODULE_GLOBAL(ipport_lowlastauto); 2926 } else { 2927 first = MODULE_GLOBAL(ipport_firstauto); 2928 last = MODULE_GLOBAL(ipport_lastauto); 2929 } 2930 if (first > last) { 2931 uint16_t temp; 2932 2933 temp = first; 2934 first = last; 2935 last = temp; 2936 } 2937 count = last - first + 1; /* number of candidates */ 2938 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2939 2940 done = 0; 2941 while (!done) { 2942 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2943 done = 1; 2944 } 2945 if (!done) { 2946 if (--count == 0) { 2947 SCTP_INP_DECR_REF(inp); 2948 SCTP_INP_WUNLOCK(inp); 2949 SCTP_INP_INFO_WUNLOCK(); 2950 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2951 return (EADDRINUSE); 2952 } 2953 if (candidate == last) 2954 candidate = first; 2955 else 2956 candidate = candidate + 1; 2957 } 2958 } 2959 lport = htons(candidate); 2960 } 2961 SCTP_INP_DECR_REF(inp); 2962 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2963 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2964 /* 2965 * this really should not happen. The guy did a non-blocking 2966 * bind and then did a close at the same time. 2967 */ 2968 SCTP_INP_WUNLOCK(inp); 2969 SCTP_INP_INFO_WUNLOCK(); 2970 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2971 return (EINVAL); 2972 } 2973 /* ok we look clear to give out this port, so lets setup the binding */ 2974 if (bindall) { 2975 /* binding to all addresses, so just set in the proper flags */ 2976 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2977 /* set the automatic addr changes from kernel flag */ 2978 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2979 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2980 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2981 } else { 2982 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2983 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2984 } 2985 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2986 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2987 } else { 2988 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2989 } 2990 /* 2991 * set the automatic mobility_base from kernel flag (by 2992 * micchie) 2993 */ 2994 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 2995 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 2996 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2997 } else { 2998 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 2999 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3000 } 3001 /* 3002 * set the automatic mobility_fasthandoff from kernel flag 3003 * (by micchie) 3004 */ 3005 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3006 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3007 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3008 } else { 3009 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3010 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3011 } 3012 } else { 3013 /* 3014 * bind specific, make sure flags is off and add a new 3015 * address structure to the sctp_addr_list inside the ep 3016 * structure. 3017 * 3018 * We will need to allocate one and insert it at the head. The 3019 * socketopt call can just insert new addresses in there as 3020 * well. It will also have to do the embed scope kame hack 3021 * too (before adding). 3022 */ 3023 struct sctp_ifa *ifa; 3024 struct sockaddr_storage store_sa; 3025 3026 memset(&store_sa, 0, sizeof(store_sa)); 3027 if (addr->sa_family == AF_INET) { 3028 struct sockaddr_in *sin; 3029 3030 sin = (struct sockaddr_in *)&store_sa; 3031 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3032 sin->sin_port = 0; 3033 } else if (addr->sa_family == AF_INET6) { 3034 struct sockaddr_in6 *sin6; 3035 3036 sin6 = (struct sockaddr_in6 *)&store_sa; 3037 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3038 sin6->sin6_port = 0; 3039 } 3040 /* 3041 * first find the interface with the bound address need to 3042 * zero out the port to find the address! yuck! can't do 3043 * this earlier since need port for sctp_pcb_findep() 3044 */ 3045 if (sctp_ifap != NULL) 3046 ifa = sctp_ifap; 3047 else { 3048 /* 3049 * Note for BSD we hit here always other O/S's will 3050 * pass things in via the sctp_ifap argument 3051 * (Panda). 3052 */ 3053 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3054 vrf_id, SCTP_ADDR_NOT_LOCKED); 3055 } 3056 if (ifa == NULL) { 3057 /* Can't find an interface with that address */ 3058 SCTP_INP_WUNLOCK(inp); 3059 SCTP_INP_INFO_WUNLOCK(); 3060 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3061 return (EADDRNOTAVAIL); 3062 } 3063 if (addr->sa_family == AF_INET6) { 3064 /* GAK, more FIXME IFA lock? */ 3065 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3066 /* Can't bind a non-existent addr. */ 3067 SCTP_INP_WUNLOCK(inp); 3068 SCTP_INP_INFO_WUNLOCK(); 3069 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3070 return (EINVAL); 3071 } 3072 } 3073 /* we're not bound all */ 3074 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3075 /* allow bindx() to send ASCONF's for binding changes */ 3076 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3077 /* clear automatic addr changes from kernel flag */ 3078 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3079 3080 /* add this address to the endpoint list */ 3081 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3082 if (error != 0) { 3083 SCTP_INP_WUNLOCK(inp); 3084 SCTP_INP_INFO_WUNLOCK(); 3085 return (error); 3086 } 3087 inp->laddr_count++; 3088 } 3089 /* find the bucket */ 3090 if (port_reuse_active) { 3091 /* Put it into tcp 1-2-1 hash */ 3092 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), 3093 SCTP_BASE_INFO(hashtcpmark))]; 3094 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3095 } else { 3096 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 3097 SCTP_BASE_INFO(hashmark))]; 3098 } 3099 /* put it in the bucket */ 3100 LIST_INSERT_HEAD(head, inp, sctp_hash); 3101 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3102 head, ntohs(lport), port_reuse_active); 3103 /* set in the port */ 3104 inp->sctp_lport = lport; 3105 3106 /* turn off just the unbound flag */ 3107 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3108 SCTP_INP_WUNLOCK(inp); 3109 SCTP_INP_INFO_WUNLOCK(); 3110 return (0); 3111} 3112 3113 3114static void 3115sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3116{ 3117 struct sctp_iterator *it, *nit; 3118 3119 /* 3120 * We enter with the only the ITERATOR_LOCK in place and a write 3121 * lock on the inp_info stuff. 3122 */ 3123 it = sctp_it_ctl.cur_it; 3124 if (it && (it->vn != curvnet)) { 3125 /* Its not looking at our VNET */ 3126 return; 3127 } 3128 if (it && (it->inp == inp)) { 3129 /* 3130 * This is tricky and we hold the iterator lock, but when it 3131 * returns and gets the lock (when we release it) the 3132 * iterator will try to operate on inp. We need to stop that 3133 * from happening. But of course the iterator has a 3134 * reference on the stcb and inp. We can mark it and it will 3135 * stop. 3136 * 3137 * If its a single iterator situation, we set the end iterator 3138 * flag. Otherwise we set the iterator to go to the next 3139 * inp. 3140 * 3141 */ 3142 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3143 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3144 } else { 3145 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3146 } 3147 } 3148 /* 3149 * Now go through and remove any single reference to our inp that 3150 * may be still pending on the list 3151 */ 3152 SCTP_IPI_ITERATOR_WQ_LOCK(); 3153 it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead); 3154 while (it) { 3155 nit = TAILQ_NEXT(it, sctp_nxt_itr); 3156 if (it->vn != curvnet) { 3157 it = nit; 3158 continue; 3159 } 3160 if (it->inp == inp) { 3161 /* This one points to me is it inp specific? */ 3162 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3163 /* Remove and free this one */ 3164 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3165 it, sctp_nxt_itr); 3166 if (it->function_atend != NULL) { 3167 (*it->function_atend) (it->pointer, it->val); 3168 } 3169 SCTP_FREE(it, SCTP_M_ITER); 3170 } else { 3171 it->inp = LIST_NEXT(it->inp, sctp_list); 3172 if (it->inp) { 3173 SCTP_INP_INCR_REF(it->inp); 3174 } 3175 } 3176 /* 3177 * When its put in the refcnt is incremented so decr 3178 * it 3179 */ 3180 SCTP_INP_DECR_REF(inp); 3181 } 3182 it = nit; 3183 } 3184 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3185} 3186 3187/* release sctp_inpcb unbind the port */ 3188void 3189sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3190{ 3191 /* 3192 * Here we free a endpoint. We must find it (if it is in the Hash 3193 * table) and remove it from there. Then we must also find it in the 3194 * overall list and remove it from there. After all removals are 3195 * complete then any timer has to be stopped. Then start the actual 3196 * freeing. a) Any local lists. b) Any associations. c) The hash of 3197 * all associations. d) finally the ep itself. 3198 */ 3199 struct sctp_pcb *m; 3200 struct sctp_tcb *asoc, *nasoc; 3201 struct sctp_laddr *laddr, *nladdr; 3202 struct inpcb *ip_pcb; 3203 struct socket *so; 3204 int being_refed = 0; 3205 struct sctp_queued_to_read *sq; 3206 3207 3208 int cnt; 3209 sctp_sharedkey_t *shared_key; 3210 3211 3212#ifdef SCTP_LOG_CLOSING 3213 sctp_log_closing(inp, NULL, 0); 3214#endif 3215 SCTP_ITERATOR_LOCK(); 3216 /* mark any iterators on the list or being processed */ 3217 sctp_iterator_inp_being_freed(inp); 3218 SCTP_ITERATOR_UNLOCK(); 3219 so = inp->sctp_socket; 3220 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3221 /* been here before.. eeks.. get out of here */ 3222 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3223#ifdef SCTP_LOG_CLOSING 3224 sctp_log_closing(inp, NULL, 1); 3225#endif 3226 return; 3227 } 3228 SCTP_ASOC_CREATE_LOCK(inp); 3229 SCTP_INP_INFO_WLOCK(); 3230 3231 SCTP_INP_WLOCK(inp); 3232 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3233 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3234 /* socket is gone, so no more wakeups allowed */ 3235 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3236 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3237 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3238 3239 } 3240 /* First time through we have the socket lock, after that no more. */ 3241 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3242 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3243 3244 if (inp->control) { 3245 sctp_m_freem(inp->control); 3246 inp->control = NULL; 3247 } 3248 if (inp->pkt) { 3249 sctp_m_freem(inp->pkt); 3250 inp->pkt = NULL; 3251 } 3252 m = &inp->sctp_ep; 3253 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3254 * here but I will be nice :> (i.e. 3255 * ip_pcb = ep;) */ 3256 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3257 int cnt_in_sd; 3258 3259 cnt_in_sd = 0; 3260 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 3261 asoc = nasoc) { 3262 SCTP_TCB_LOCK(asoc); 3263 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3264 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3265 /* Skip guys being freed */ 3266 cnt_in_sd++; 3267 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3268 /* 3269 * Special case - we did not start a 3270 * kill timer on the asoc due to it 3271 * was not closed. So go ahead and 3272 * start it now. 3273 */ 3274 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3275 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3276 } 3277 SCTP_TCB_UNLOCK(asoc); 3278 continue; 3279 } 3280 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3281 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3282 (asoc->asoc.total_output_queue_size == 0)) { 3283 /* 3284 * If we have data in queue, we don't want 3285 * to just free since the app may have done, 3286 * send()/close or connect/send/close. And 3287 * it wants the data to get across first. 3288 */ 3289 /* Just abandon things in the front states */ 3290 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3291 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3292 cnt_in_sd++; 3293 } 3294 continue; 3295 } 3296 /* Disconnect the socket please */ 3297 asoc->sctp_socket = NULL; 3298 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3299 if ((asoc->asoc.size_on_reasm_queue > 0) || 3300 (asoc->asoc.control_pdapi) || 3301 (asoc->asoc.size_on_all_streams > 0) || 3302 (so && (so->so_rcv.sb_cc > 0)) 3303 ) { 3304 /* Left with Data unread */ 3305 struct mbuf *op_err; 3306 3307 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3308 0, M_DONTWAIT, 1, MT_DATA); 3309 if (op_err) { 3310 /* Fill in the user initiated abort */ 3311 struct sctp_paramhdr *ph; 3312 uint32_t *ippp; 3313 3314 SCTP_BUF_LEN(op_err) = 3315 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3316 ph = mtod(op_err, 3317 struct sctp_paramhdr *); 3318 ph->param_type = htons( 3319 SCTP_CAUSE_USER_INITIATED_ABT); 3320 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3321 ippp = (uint32_t *) (ph + 1); 3322 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3323 } 3324 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3325#if defined(SCTP_PANIC_ON_ABORT) 3326 panic("inpcb_free does an abort"); 3327#endif 3328 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3329 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3330 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3331 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3332 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3333 } 3334 if (sctp_free_assoc(inp, asoc, 3335 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3336 cnt_in_sd++; 3337 } 3338 continue; 3339 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3340 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3341 (asoc->asoc.stream_queue_cnt == 0) 3342 ) { 3343 if (asoc->asoc.locked_on_sending) { 3344 goto abort_anyway; 3345 } 3346 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3347 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3348 /* 3349 * there is nothing queued to send, 3350 * so I send shutdown 3351 */ 3352 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 3353 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3354 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3355 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3356 } 3357 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3358 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3359 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3360 asoc->asoc.primary_destination); 3361 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3362 asoc->asoc.primary_destination); 3363 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3364 } 3365 } else { 3366 /* mark into shutdown pending */ 3367 struct sctp_stream_queue_pending *sp; 3368 3369 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3370 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3371 asoc->asoc.primary_destination); 3372 if (asoc->asoc.locked_on_sending) { 3373 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3374 sctp_streamhead); 3375 if (sp == NULL) { 3376 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3377 asoc->asoc.locked_on_sending, 3378 asoc->asoc.locked_on_sending->stream_no); 3379 } else { 3380 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3381 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3382 } 3383 } 3384 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3385 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3386 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3387 struct mbuf *op_err; 3388 3389 abort_anyway: 3390 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3391 0, M_DONTWAIT, 1, MT_DATA); 3392 if (op_err) { 3393 /* 3394 * Fill in the user 3395 * initiated abort 3396 */ 3397 struct sctp_paramhdr *ph; 3398 uint32_t *ippp; 3399 3400 SCTP_BUF_LEN(op_err) = 3401 (sizeof(struct sctp_paramhdr) + 3402 sizeof(uint32_t)); 3403 ph = mtod(op_err, 3404 struct sctp_paramhdr *); 3405 ph->param_type = htons( 3406 SCTP_CAUSE_USER_INITIATED_ABT); 3407 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3408 ippp = (uint32_t *) (ph + 1); 3409 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3410 } 3411 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3412#if defined(SCTP_PANIC_ON_ABORT) 3413 panic("inpcb_free does an abort"); 3414#endif 3415 3416 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3417 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3418 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3419 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3420 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3421 } 3422 if (sctp_free_assoc(inp, asoc, 3423 SCTP_PCBFREE_NOFORCE, 3424 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3425 cnt_in_sd++; 3426 } 3427 continue; 3428 } else { 3429 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3430 } 3431 } 3432 cnt_in_sd++; 3433 SCTP_TCB_UNLOCK(asoc); 3434 } 3435 /* now is there some left in our SHUTDOWN state? */ 3436 if (cnt_in_sd) { 3437#ifdef SCTP_LOG_CLOSING 3438 sctp_log_closing(inp, NULL, 2); 3439#endif 3440 inp->sctp_socket = NULL; 3441 SCTP_INP_WUNLOCK(inp); 3442 SCTP_ASOC_CREATE_UNLOCK(inp); 3443 SCTP_INP_INFO_WUNLOCK(); 3444 return; 3445 } 3446 } 3447 inp->sctp_socket = NULL; 3448 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3449 SCTP_PCB_FLAGS_UNBOUND) { 3450 /* 3451 * ok, this guy has been bound. It's port is somewhere in 3452 * the SCTP_BASE_INFO(hash table). Remove it! 3453 */ 3454 LIST_REMOVE(inp, sctp_hash); 3455 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3456 } 3457 /* 3458 * If there is a timer running to kill us, forget it, since it may 3459 * have a contest on the INP lock.. which would cause us to die ... 3460 */ 3461 cnt = 0; 3462 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 3463 asoc = nasoc) { 3464 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3465 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3466 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3467 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3468 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3469 } 3470 cnt++; 3471 continue; 3472 } 3473 /* Free associations that are NOT killing us */ 3474 SCTP_TCB_LOCK(asoc); 3475 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3476 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3477 struct mbuf *op_err; 3478 uint32_t *ippp; 3479 3480 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3481 0, M_DONTWAIT, 1, MT_DATA); 3482 if (op_err) { 3483 /* Fill in the user initiated abort */ 3484 struct sctp_paramhdr *ph; 3485 3486 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3487 sizeof(uint32_t)); 3488 ph = mtod(op_err, struct sctp_paramhdr *); 3489 ph->param_type = htons( 3490 SCTP_CAUSE_USER_INITIATED_ABT); 3491 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3492 ippp = (uint32_t *) (ph + 1); 3493 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3494 3495 } 3496 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3497#if defined(SCTP_PANIC_ON_ABORT) 3498 panic("inpcb_free does an abort"); 3499#endif 3500 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3501 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3502 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3503 cnt++; 3504 SCTP_TCB_UNLOCK(asoc); 3505 continue; 3506 } 3507 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3508 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3509 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3510 } 3511 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3512 cnt++; 3513 } 3514 } 3515 if (cnt) { 3516 /* Ok we have someone out there that will kill us */ 3517 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3518#ifdef SCTP_LOG_CLOSING 3519 sctp_log_closing(inp, NULL, 3); 3520#endif 3521 SCTP_INP_WUNLOCK(inp); 3522 SCTP_ASOC_CREATE_UNLOCK(inp); 3523 SCTP_INP_INFO_WUNLOCK(); 3524 return; 3525 } 3526 if (SCTP_INP_LOCK_CONTENDED(inp)) 3527 being_refed++; 3528 if (SCTP_INP_READ_CONTENDED(inp)) 3529 being_refed++; 3530 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3531 being_refed++; 3532 3533 if ((inp->refcount) || 3534 (being_refed) || 3535 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3536 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3537#ifdef SCTP_LOG_CLOSING 3538 sctp_log_closing(inp, NULL, 4); 3539#endif 3540 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3541 SCTP_INP_WUNLOCK(inp); 3542 SCTP_ASOC_CREATE_UNLOCK(inp); 3543 SCTP_INP_INFO_WUNLOCK(); 3544 return; 3545 } 3546 inp->sctp_ep.signature_change.type = 0; 3547 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3548 /* 3549 * Remove it from the list .. last thing we need a lock for. 3550 */ 3551 LIST_REMOVE(inp, sctp_list); 3552 SCTP_INP_WUNLOCK(inp); 3553 SCTP_ASOC_CREATE_UNLOCK(inp); 3554 SCTP_INP_INFO_WUNLOCK(); 3555 /* 3556 * Now we release all locks. Since this INP cannot be found anymore 3557 * except possbily by the kill timer that might be running. We call 3558 * the drain function here. It should hit the case were it sees the 3559 * ACTIVE flag cleared and exit out freeing us to proceed and 3560 * destroy everything. 3561 */ 3562 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3563 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3564 } else { 3565 /* Probably un-needed */ 3566 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3567 } 3568 3569#ifdef SCTP_LOG_CLOSING 3570 sctp_log_closing(inp, NULL, 5); 3571#endif 3572 3573 3574 if ((inp->sctp_asocidhash) != NULL) { 3575 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3576 inp->sctp_asocidhash = NULL; 3577 } 3578 /* sa_ignore FREED_MEMORY */ 3579 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { 3580 /* Its only abandoned if it had data left */ 3581 if (sq->length) 3582 SCTP_STAT_INCR(sctps_left_abandon); 3583 3584 TAILQ_REMOVE(&inp->read_queue, sq, next); 3585 sctp_free_remote_addr(sq->whoFrom); 3586 if (so) 3587 so->so_rcv.sb_cc -= sq->length; 3588 if (sq->data) { 3589 sctp_m_freem(sq->data); 3590 sq->data = NULL; 3591 } 3592 /* 3593 * no need to free the net count, since at this point all 3594 * assoc's are gone. 3595 */ 3596 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3597 SCTP_DECR_READQ_COUNT(); 3598 } 3599 /* Now the sctp_pcb things */ 3600 /* 3601 * free each asoc if it is not already closed/free. we can't use the 3602 * macro here since le_next will get freed as part of the 3603 * sctp_free_assoc() call. 3604 */ 3605 cnt = 0; 3606 if (so) { 3607#ifdef IPSEC 3608 ipsec_delete_pcbpolicy(ip_pcb); 3609#endif /* IPSEC */ 3610 3611 /* Unlocks not needed since the socket is gone now */ 3612 } 3613 if (ip_pcb->inp_options) { 3614 (void)sctp_m_free(ip_pcb->inp_options); 3615 ip_pcb->inp_options = 0; 3616 } 3617 if (ip_pcb->inp_moptions) { 3618 inp_freemoptions(ip_pcb->inp_moptions); 3619 ip_pcb->inp_moptions = 0; 3620 } 3621#ifdef INET6 3622 if (ip_pcb->inp_vflag & INP_IPV6) { 3623 struct in6pcb *in6p; 3624 3625 in6p = (struct in6pcb *)inp; 3626 ip6_freepcbopts(in6p->in6p_outputopts); 3627 } 3628#endif /* INET6 */ 3629 ip_pcb->inp_vflag = 0; 3630 /* free up authentication fields */ 3631 if (inp->sctp_ep.local_auth_chunks != NULL) 3632 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3633 if (inp->sctp_ep.local_hmacs != NULL) 3634 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3635 3636 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 3637 while (shared_key) { 3638 LIST_REMOVE(shared_key, next); 3639 sctp_free_sharedkey(shared_key); 3640 /* sa_ignore FREED_MEMORY */ 3641 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 3642 } 3643 3644 /* 3645 * if we have an address list the following will free the list of 3646 * ifaddr's that are set into this ep. Again macro limitations here, 3647 * since the LIST_FOREACH could be a bad idea. 3648 */ 3649 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; 3650 laddr = nladdr) { 3651 nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 3652 sctp_remove_laddr(laddr); 3653 } 3654 3655#ifdef SCTP_TRACK_FREED_ASOCS 3656 /* TEMP CODE */ 3657 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; 3658 asoc = nasoc) { 3659 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3660 LIST_REMOVE(asoc, sctp_tcblist); 3661 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3662 SCTP_DECR_ASOC_COUNT(); 3663 } 3664 /* *** END TEMP CODE *** */ 3665#endif 3666 /* Now lets see about freeing the EP hash table. */ 3667 if (inp->sctp_tcbhash != NULL) { 3668 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3669 inp->sctp_tcbhash = NULL; 3670 } 3671 /* Now we must put the ep memory back into the zone pool */ 3672 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3673 SCTP_INP_LOCK_DESTROY(inp); 3674 SCTP_INP_READ_DESTROY(inp); 3675 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3676 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3677 SCTP_DECR_EP_COUNT(); 3678} 3679 3680 3681struct sctp_nets * 3682sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3683{ 3684 struct sctp_nets *net; 3685 3686 /* locate the address */ 3687 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3688 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3689 return (net); 3690 } 3691 return (NULL); 3692} 3693 3694 3695int 3696sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3697{ 3698 struct sctp_ifa *sctp_ifa; 3699 3700 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3701 if (sctp_ifa) { 3702 return (1); 3703 } else { 3704 return (0); 3705 } 3706} 3707 3708/* 3709 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3710 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3711 * stats of stuff. 3712 */ 3713int 3714sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3715 int set_scope, int from) 3716{ 3717 /* 3718 * The following is redundant to the same lines in the 3719 * sctp_aloc_assoc() but is needed since other's call the add 3720 * address function 3721 */ 3722 struct sctp_nets *net, *netfirst; 3723 int addr_inscope; 3724 3725 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3726 from); 3727 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3728 3729 netfirst = sctp_findnet(stcb, newaddr); 3730 if (netfirst) { 3731 /* 3732 * Lie and return ok, we don't want to make the association 3733 * go away for this behavior. It will happen in the TCP 3734 * model in a connected socket. It does not reach the hash 3735 * table until after the association is built so it can't be 3736 * found. Mark as reachable, since the initial creation will 3737 * have been cleared and the NOT_IN_ASSOC flag will have 3738 * been added... and we don't want to end up removing it 3739 * back out. 3740 */ 3741 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3742 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3743 SCTP_ADDR_UNCONFIRMED); 3744 } else { 3745 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3746 } 3747 3748 return (0); 3749 } 3750 addr_inscope = 1; 3751 if (newaddr->sa_family == AF_INET) { 3752 struct sockaddr_in *sin; 3753 3754 sin = (struct sockaddr_in *)newaddr; 3755 if (sin->sin_addr.s_addr == 0) { 3756 /* Invalid address */ 3757 return (-1); 3758 } 3759 /* zero out the bzero area */ 3760 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3761 3762 /* assure len is set */ 3763 sin->sin_len = sizeof(struct sockaddr_in); 3764 if (set_scope) { 3765#ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3766 stcb->ipv4_local_scope = 1; 3767#else 3768 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3769 stcb->asoc.ipv4_local_scope = 1; 3770 } 3771#endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3772 } else { 3773 /* Validate the address is in scope */ 3774 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3775 (stcb->asoc.ipv4_local_scope == 0)) { 3776 addr_inscope = 0; 3777 } 3778 } 3779#ifdef INET6 3780 } else if (newaddr->sa_family == AF_INET6) { 3781 struct sockaddr_in6 *sin6; 3782 3783 sin6 = (struct sockaddr_in6 *)newaddr; 3784 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3785 /* Invalid address */ 3786 return (-1); 3787 } 3788 /* assure len is set */ 3789 sin6->sin6_len = sizeof(struct sockaddr_in6); 3790 if (set_scope) { 3791 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3792 stcb->asoc.loopback_scope = 1; 3793 stcb->asoc.local_scope = 0; 3794 stcb->asoc.ipv4_local_scope = 1; 3795 stcb->asoc.site_scope = 1; 3796 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3797 /* 3798 * If the new destination is a LINK_LOCAL we 3799 * must have common site scope. Don't set 3800 * the local scope since we may not share 3801 * all links, only loopback can do this. 3802 * Links on the local network would also be 3803 * on our private network for v4 too. 3804 */ 3805 stcb->asoc.ipv4_local_scope = 1; 3806 stcb->asoc.site_scope = 1; 3807 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3808 /* 3809 * If the new destination is SITE_LOCAL then 3810 * we must have site scope in common. 3811 */ 3812 stcb->asoc.site_scope = 1; 3813 } 3814 } else { 3815 /* Validate the address is in scope */ 3816 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3817 (stcb->asoc.loopback_scope == 0)) { 3818 addr_inscope = 0; 3819 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3820 (stcb->asoc.local_scope == 0)) { 3821 addr_inscope = 0; 3822 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3823 (stcb->asoc.site_scope == 0)) { 3824 addr_inscope = 0; 3825 } 3826 } 3827#endif 3828 } else { 3829 /* not supported family type */ 3830 return (-1); 3831 } 3832 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3833 if (net == NULL) { 3834 return (-1); 3835 } 3836 SCTP_INCR_RADDR_COUNT(); 3837 bzero(net, sizeof(*net)); 3838 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3839 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3840 if (newaddr->sa_family == AF_INET) { 3841 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3842 } else if (newaddr->sa_family == AF_INET6) { 3843 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3844 } 3845 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3846 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3847 stcb->asoc.loopback_scope = 1; 3848 stcb->asoc.ipv4_local_scope = 1; 3849 stcb->asoc.local_scope = 0; 3850 stcb->asoc.site_scope = 1; 3851 addr_inscope = 1; 3852 } 3853 net->failure_threshold = stcb->asoc.def_net_failure; 3854 if (addr_inscope == 0) { 3855 net->dest_state = (SCTP_ADDR_REACHABLE | 3856 SCTP_ADDR_OUT_OF_SCOPE); 3857 } else { 3858 if (from == SCTP_ADDR_IS_CONFIRMED) 3859 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3860 net->dest_state = SCTP_ADDR_REACHABLE; 3861 else 3862 net->dest_state = SCTP_ADDR_REACHABLE | 3863 SCTP_ADDR_UNCONFIRMED; 3864 } 3865 /* 3866 * We set this to 0, the timer code knows that this means its an 3867 * initial value 3868 */ 3869 net->RTO = 0; 3870 net->RTO_measured = 0; 3871 stcb->asoc.numnets++; 3872 *(&net->ref_count) = 1; 3873 net->tos_flowlabel = 0; 3874 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 3875 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 3876 } else { 3877 net->port = 0; 3878 } 3879#ifdef INET 3880 if (newaddr->sa_family == AF_INET) 3881 net->tos_flowlabel = stcb->asoc.default_tos; 3882#endif 3883#ifdef INET6 3884 if (newaddr->sa_family == AF_INET6) 3885 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3886#endif 3887 /* Init the timer structure */ 3888 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3889 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3890 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3891 3892 /* Now generate a route for this guy */ 3893#ifdef INET6 3894 /* KAME hack: embed scopeid */ 3895 if (newaddr->sa_family == AF_INET6) { 3896 struct sockaddr_in6 *sin6; 3897 3898 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3899 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3900 sin6->sin6_scope_id = 0; 3901 } 3902#endif 3903 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3904 3905 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3906 /* Get source address */ 3907 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3908 stcb, 3909 (sctp_route_t *) & net->ro, 3910 net, 3911 0, 3912 stcb->asoc.vrf_id); 3913 /* Now get the interface MTU */ 3914 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3915 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3916 } else { 3917 net->mtu = 0; 3918 } 3919#ifdef SCTP_PRINT_FOR_B_AND_M 3920 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu); 3921#endif 3922 if (net->mtu == 0) { 3923 /* Huh ?? */ 3924 net->mtu = SCTP_DEFAULT_MTU; 3925 } else { 3926 uint32_t rmtu; 3927 3928 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3929#ifdef SCTP_PRINT_FOR_B_AND_M 3930 SCTP_PRINTF("The route mtu is %d\n", rmtu); 3931#endif 3932 if (rmtu == 0) { 3933 /* 3934 * Start things off to match mtu of 3935 * interface please. 3936 */ 3937 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3938 net->ro.ro_rt, net->mtu); 3939 } else { 3940 /* 3941 * we take the route mtu over the interface, 3942 * since the route may be leading out the 3943 * loopback, or a different interface. 3944 */ 3945 net->mtu = rmtu; 3946 } 3947 } 3948 if (from == SCTP_ALLOC_ASOC) { 3949#ifdef SCTP_PRINT_FOR_B_AND_M 3950 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu); 3951#endif 3952 stcb->asoc.smallest_mtu = net->mtu; 3953 } 3954 } else { 3955 net->mtu = stcb->asoc.smallest_mtu; 3956 } 3957#ifdef INET6 3958 if (newaddr->sa_family == AF_INET6) { 3959 struct sockaddr_in6 *sin6; 3960 3961 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3962 (void)sa6_recoverscope(sin6); 3963 } 3964#endif 3965 if (net->port) { 3966 net->mtu -= sizeof(struct udphdr); 3967 } 3968 if (stcb->asoc.smallest_mtu > net->mtu) { 3969#ifdef SCTP_PRINT_FOR_B_AND_M 3970 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n", 3971 net->mtu, stcb->asoc.smallest_mtu); 3972#endif 3973 stcb->asoc.smallest_mtu = net->mtu; 3974 } 3975 /* JRS - Use the congestion control given in the CC module */ 3976 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 3977 3978 /* 3979 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3980 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3981 */ 3982 net->find_pseudo_cumack = 1; 3983 net->find_rtx_pseudo_cumack = 1; 3984 net->src_addr_selected = 0; 3985 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3986 if (net->ro.ro_rt == NULL) { 3987 /* Since we have no route put it at the back */ 3988 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3989 } else if (netfirst == NULL) { 3990 /* We are the first one in the pool. */ 3991 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3992 } else if (netfirst->ro.ro_rt == NULL) { 3993 /* 3994 * First one has NO route. Place this one ahead of the first 3995 * one. 3996 */ 3997 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3998 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3999 /* 4000 * This one has a different interface than the one at the 4001 * top of the list. Place it ahead. 4002 */ 4003 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4004 } else { 4005 /* 4006 * Ok we have the same interface as the first one. Move 4007 * forward until we find either a) one with a NULL route... 4008 * insert ahead of that b) one with a different ifp.. insert 4009 * after that. c) end of the list.. insert at the tail. 4010 */ 4011 struct sctp_nets *netlook; 4012 4013 do { 4014 netlook = TAILQ_NEXT(netfirst, sctp_next); 4015 if (netlook == NULL) { 4016 /* End of the list */ 4017 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4018 break; 4019 } else if (netlook->ro.ro_rt == NULL) { 4020 /* next one has NO route */ 4021 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4022 break; 4023 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4024 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4025 net, sctp_next); 4026 break; 4027 } 4028 /* Shift forward */ 4029 netfirst = netlook; 4030 } while (netlook != NULL); 4031 } 4032 4033 /* got to have a primary set */ 4034 if (stcb->asoc.primary_destination == 0) { 4035 stcb->asoc.primary_destination = net; 4036 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4037 (net->ro.ro_rt) && 4038 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4039 /* No route to current primary adopt new primary */ 4040 stcb->asoc.primary_destination = net; 4041 } 4042 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 4043 net); 4044 /* Validate primary is first */ 4045 net = TAILQ_FIRST(&stcb->asoc.nets); 4046 if ((net != stcb->asoc.primary_destination) && 4047 (stcb->asoc.primary_destination)) { 4048 /* 4049 * first one on the list is NOT the primary sctp_cmpaddr() 4050 * is much more efficent if the primary is the first on the 4051 * list, make it so. 4052 */ 4053 TAILQ_REMOVE(&stcb->asoc.nets, 4054 stcb->asoc.primary_destination, sctp_next); 4055 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4056 stcb->asoc.primary_destination, sctp_next); 4057 } 4058 return (0); 4059} 4060 4061 4062static uint32_t 4063sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4064{ 4065 uint32_t id; 4066 struct sctpasochead *head; 4067 struct sctp_tcb *lstcb; 4068 4069 SCTP_INP_WLOCK(inp); 4070try_again: 4071 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4072 /* TSNH */ 4073 SCTP_INP_WUNLOCK(inp); 4074 return (0); 4075 } 4076 /* 4077 * We don't allow assoc id to be 0, this is needed otherwise if the 4078 * id were to wrap we would have issues with some socket options. 4079 */ 4080 if (inp->sctp_associd_counter == 0) { 4081 inp->sctp_associd_counter++; 4082 } 4083 id = inp->sctp_associd_counter; 4084 inp->sctp_associd_counter++; 4085 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4086 if (lstcb) { 4087 goto try_again; 4088 } 4089 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4090 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4091 stcb->asoc.in_asocid_hash = 1; 4092 SCTP_INP_WUNLOCK(inp); 4093 return id; 4094} 4095 4096/* 4097 * allocate an association and add it to the endpoint. The caller must be 4098 * careful to add all additional addresses once they are know right away or 4099 * else the assoc will be may experience a blackout scenario. 4100 */ 4101struct sctp_tcb * 4102sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4103 int *error, uint32_t override_tag, uint32_t vrf_id, 4104 struct thread *p 4105) 4106{ 4107 /* note the p argument is only valid in unbound sockets */ 4108 4109 struct sctp_tcb *stcb; 4110 struct sctp_association *asoc; 4111 struct sctpasochead *head; 4112 uint16_t rport; 4113 int err; 4114 4115 /* 4116 * Assumption made here: Caller has done a 4117 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4118 * address does not exist already. 4119 */ 4120 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4121 /* Hit max assoc, sorry no more */ 4122 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4123 *error = ENOBUFS; 4124 return (NULL); 4125 } 4126 if (firstaddr == NULL) { 4127 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4128 *error = EINVAL; 4129 return (NULL); 4130 } 4131 SCTP_INP_RLOCK(inp); 4132 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4133 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4134 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4135 /* 4136 * If its in the TCP pool, its NOT allowed to create an 4137 * association. The parent listener needs to call 4138 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4139 * off, or connected one does this.. its an error. 4140 */ 4141 SCTP_INP_RUNLOCK(inp); 4142 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4143 *error = EINVAL; 4144 return (NULL); 4145 } 4146 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4147#ifdef SCTP_DEBUG 4148 if (firstaddr) { 4149 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4150 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4151 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4152 } else { 4153 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4154 } 4155#endif /* SCTP_DEBUG */ 4156 if (firstaddr->sa_family == AF_INET) { 4157 struct sockaddr_in *sin; 4158 4159 sin = (struct sockaddr_in *)firstaddr; 4160 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 4161 /* Invalid address */ 4162 SCTP_INP_RUNLOCK(inp); 4163 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4164 *error = EINVAL; 4165 return (NULL); 4166 } 4167 rport = sin->sin_port; 4168 } else if (firstaddr->sa_family == AF_INET6) { 4169 struct sockaddr_in6 *sin6; 4170 4171 sin6 = (struct sockaddr_in6 *)firstaddr; 4172 if ((sin6->sin6_port == 0) || 4173 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 4174 /* Invalid address */ 4175 SCTP_INP_RUNLOCK(inp); 4176 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4177 *error = EINVAL; 4178 return (NULL); 4179 } 4180 rport = sin6->sin6_port; 4181 } else { 4182 /* not supported family type */ 4183 SCTP_INP_RUNLOCK(inp); 4184 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4185 *error = EINVAL; 4186 return (NULL); 4187 } 4188 SCTP_INP_RUNLOCK(inp); 4189 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4190 /* 4191 * If you have not performed a bind, then we need to do the 4192 * ephemerial bind for you. 4193 */ 4194 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4195 (struct sockaddr *)NULL, 4196 (struct sctp_ifa *)NULL, 4197 p 4198 ))) { 4199 /* bind error, probably perm */ 4200 *error = err; 4201 return (NULL); 4202 } 4203 } 4204 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4205 if (stcb == NULL) { 4206 /* out of memory? */ 4207 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4208 *error = ENOMEM; 4209 return (NULL); 4210 } 4211 SCTP_INCR_ASOC_COUNT(); 4212 4213 bzero(stcb, sizeof(*stcb)); 4214 asoc = &stcb->asoc; 4215 4216 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4217 SCTP_TCB_LOCK_INIT(stcb); 4218 SCTP_TCB_SEND_LOCK_INIT(stcb); 4219 stcb->rport = rport; 4220 /* setup back pointer's */ 4221 stcb->sctp_ep = inp; 4222 stcb->sctp_socket = inp->sctp_socket; 4223 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4224 /* failed */ 4225 SCTP_TCB_LOCK_DESTROY(stcb); 4226 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4227 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4228 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4229 SCTP_DECR_ASOC_COUNT(); 4230 *error = err; 4231 return (NULL); 4232 } 4233 /* and the port */ 4234 SCTP_INP_INFO_WLOCK(); 4235 SCTP_INP_WLOCK(inp); 4236 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4237 /* inpcb freed while alloc going on */ 4238 SCTP_TCB_LOCK_DESTROY(stcb); 4239 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4240 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4241 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4242 SCTP_INP_WUNLOCK(inp); 4243 SCTP_INP_INFO_WUNLOCK(); 4244 SCTP_DECR_ASOC_COUNT(); 4245 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4246 *error = EINVAL; 4247 return (NULL); 4248 } 4249 SCTP_TCB_LOCK(stcb); 4250 4251 /* now that my_vtag is set, add it to the hash */ 4252 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4253 /* put it in the bucket in the vtag hash of assoc's for the system */ 4254 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4255 SCTP_INP_INFO_WUNLOCK(); 4256 4257 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4258 /* failure.. memory error? */ 4259 if (asoc->strmout) { 4260 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4261 asoc->strmout = NULL; 4262 } 4263 if (asoc->mapping_array) { 4264 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4265 asoc->mapping_array = NULL; 4266 } 4267 if (asoc->nr_mapping_array) { 4268 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4269 asoc->nr_mapping_array = NULL; 4270 } 4271 SCTP_DECR_ASOC_COUNT(); 4272 SCTP_TCB_LOCK_DESTROY(stcb); 4273 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4274 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4275 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4276 SCTP_INP_WUNLOCK(inp); 4277 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4278 *error = ENOBUFS; 4279 return (NULL); 4280 } 4281 /* Init all the timers */ 4282 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 4283 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4284 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4285 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4286 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4287 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4288 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4289 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4290 4291 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4292 /* now file the port under the hash as well */ 4293 if (inp->sctp_tcbhash != NULL) { 4294 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4295 inp->sctp_hashmark)]; 4296 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4297 } 4298 SCTP_INP_WUNLOCK(inp); 4299 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4300 return (stcb); 4301} 4302 4303 4304void 4305sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4306{ 4307 struct sctp_association *asoc; 4308 4309 asoc = &stcb->asoc; 4310 asoc->numnets--; 4311 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4312 if (net == asoc->primary_destination) { 4313 /* Reset primary */ 4314 struct sctp_nets *lnet; 4315 4316 lnet = TAILQ_FIRST(&asoc->nets); 4317 /* 4318 * Mobility adaptation Ideally, if deleted destination is 4319 * the primary, it becomes a fast retransmission trigger by 4320 * the subsequent SET PRIMARY. (by micchie) 4321 */ 4322 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4323 SCTP_MOBILITY_BASE) || 4324 sctp_is_mobility_feature_on(stcb->sctp_ep, 4325 SCTP_MOBILITY_FASTHANDOFF)) { 4326 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4327 if (asoc->deleted_primary != NULL) { 4328 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4329 goto out; 4330 } 4331 asoc->deleted_primary = net; 4332 atomic_add_int(&net->ref_count, 1); 4333 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4334 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4335 sctp_mobility_feature_on(stcb->sctp_ep, 4336 SCTP_MOBILITY_PRIM_DELETED); 4337 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4338 stcb->sctp_ep, stcb, NULL); 4339 } 4340out: 4341 /* Try to find a confirmed primary */ 4342 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4343 } 4344 if (net == asoc->last_data_chunk_from) { 4345 /* Reset primary */ 4346 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4347 } 4348 if (net == asoc->last_control_chunk_from) { 4349 /* Clear net */ 4350 asoc->last_control_chunk_from = NULL; 4351 } 4352 sctp_free_remote_addr(net); 4353} 4354 4355/* 4356 * remove a remote endpoint address from an association, it will fail if the 4357 * address does not exist. 4358 */ 4359int 4360sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4361{ 4362 /* 4363 * Here we need to remove a remote address. This is quite simple, we 4364 * first find it in the list of address for the association 4365 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4366 * on that item. Note we do not allow it to be removed if there are 4367 * no other addresses. 4368 */ 4369 struct sctp_association *asoc; 4370 struct sctp_nets *net, *net_tmp; 4371 4372 asoc = &stcb->asoc; 4373 4374 /* locate the address */ 4375 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { 4376 net_tmp = TAILQ_NEXT(net, sctp_next); 4377 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4378 continue; 4379 } 4380 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4381 remaddr)) { 4382 /* we found the guy */ 4383 if (asoc->numnets < 2) { 4384 /* Must have at LEAST two remote addresses */ 4385 return (-1); 4386 } else { 4387 sctp_remove_net(stcb, net); 4388 return (0); 4389 } 4390 } 4391 } 4392 /* not found. */ 4393 return (-2); 4394} 4395 4396void 4397sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4398{ 4399 struct sctpvtaghead *chain; 4400 struct sctp_tagblock *twait_block; 4401 int found = 0; 4402 int i; 4403 4404 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4405 if (!LIST_EMPTY(chain)) { 4406 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4407 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4408 if ((twait_block->vtag_block[i].v_tag == tag) && 4409 (twait_block->vtag_block[i].lport == lport) && 4410 (twait_block->vtag_block[i].rport == rport)) { 4411 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4412 twait_block->vtag_block[i].v_tag = 0; 4413 twait_block->vtag_block[i].lport = 0; 4414 twait_block->vtag_block[i].rport = 0; 4415 found = 1; 4416 break; 4417 } 4418 } 4419 if (found) 4420 break; 4421 } 4422 } 4423} 4424 4425int 4426sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4427{ 4428 struct sctpvtaghead *chain; 4429 struct sctp_tagblock *twait_block; 4430 int found = 0; 4431 int i; 4432 4433 SCTP_INP_INFO_WLOCK(); 4434 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4435 if (!LIST_EMPTY(chain)) { 4436 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4437 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4438 if ((twait_block->vtag_block[i].v_tag == tag) && 4439 (twait_block->vtag_block[i].lport == lport) && 4440 (twait_block->vtag_block[i].rport == rport)) { 4441 found = 1; 4442 break; 4443 } 4444 } 4445 if (found) 4446 break; 4447 } 4448 } 4449 SCTP_INP_INFO_WUNLOCK(); 4450 return (found); 4451} 4452 4453 4454void 4455sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4456{ 4457 struct sctpvtaghead *chain; 4458 struct sctp_tagblock *twait_block; 4459 struct timeval now; 4460 int set, i; 4461 4462 if (time == 0) { 4463 /* Its disabled */ 4464 return; 4465 } 4466 (void)SCTP_GETTIME_TIMEVAL(&now); 4467 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4468 set = 0; 4469 if (!LIST_EMPTY(chain)) { 4470 /* Block(s) present, lets find space, and expire on the fly */ 4471 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4472 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4473 if ((twait_block->vtag_block[i].v_tag == 0) && 4474 !set) { 4475 twait_block->vtag_block[i].tv_sec_at_expire = 4476 now.tv_sec + time; 4477 twait_block->vtag_block[i].v_tag = tag; 4478 twait_block->vtag_block[i].lport = lport; 4479 twait_block->vtag_block[i].rport = rport; 4480 set = 1; 4481 } else if ((twait_block->vtag_block[i].v_tag) && 4482 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4483 /* Audit expires this guy */ 4484 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4485 twait_block->vtag_block[i].v_tag = 0; 4486 twait_block->vtag_block[i].lport = 0; 4487 twait_block->vtag_block[i].rport = 0; 4488 if (set == 0) { 4489 /* Reuse it for my new tag */ 4490 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4491 twait_block->vtag_block[i].v_tag = tag; 4492 twait_block->vtag_block[i].lport = lport; 4493 twait_block->vtag_block[i].rport = rport; 4494 set = 1; 4495 } 4496 } 4497 } 4498 if (set) { 4499 /* 4500 * We only do up to the block where we can 4501 * place our tag for audits 4502 */ 4503 break; 4504 } 4505 } 4506 } 4507 /* Need to add a new block to chain */ 4508 if (!set) { 4509 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4510 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4511 if (twait_block == NULL) { 4512#ifdef INVARIANTS 4513 panic("Can not alloc tagblock"); 4514#endif 4515 return; 4516 } 4517 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4518 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4519 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4520 twait_block->vtag_block[0].v_tag = tag; 4521 twait_block->vtag_block[0].lport = lport; 4522 twait_block->vtag_block[0].rport = rport; 4523 } 4524} 4525 4526 4527 4528/*- 4529 * Free the association after un-hashing the remote port. This 4530 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4531 * expect that the input to this function IS a locked TCB. 4532 * It will return 0, if it did NOT destroy the association (instead 4533 * it unlocks it. It will return NON-zero if it either destroyed the 4534 * association OR the association is already destroyed. 4535 */ 4536int 4537sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4538{ 4539 int i; 4540 struct sctp_association *asoc; 4541 struct sctp_nets *net, *prev; 4542 struct sctp_laddr *laddr; 4543 struct sctp_tmit_chunk *chk; 4544 struct sctp_asconf_addr *aparam; 4545 struct sctp_asconf_ack *aack; 4546 struct sctp_stream_reset_list *liste; 4547 struct sctp_queued_to_read *sq; 4548 struct sctp_stream_queue_pending *sp; 4549 sctp_sharedkey_t *shared_key; 4550 struct socket *so; 4551 int ccnt = 0; 4552 int cnt = 0; 4553 4554 /* first, lets purge the entry from the hash table. */ 4555 4556#ifdef SCTP_LOG_CLOSING 4557 sctp_log_closing(inp, stcb, 6); 4558#endif 4559 if (stcb->asoc.state == 0) { 4560#ifdef SCTP_LOG_CLOSING 4561 sctp_log_closing(inp, NULL, 7); 4562#endif 4563 /* there is no asoc, really TSNH :-0 */ 4564 return (1); 4565 } 4566 /* TEMP CODE */ 4567 if (stcb->freed_from_where == 0) { 4568 /* Only record the first place free happened from */ 4569 stcb->freed_from_where = from_location; 4570 } 4571 /* TEMP CODE */ 4572 4573 asoc = &stcb->asoc; 4574 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4575 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4576 /* nothing around */ 4577 so = NULL; 4578 else 4579 so = inp->sctp_socket; 4580 4581 /* 4582 * We used timer based freeing if a reader or writer is in the way. 4583 * So we first check if we are actually being called from a timer, 4584 * if so we abort early if a reader or writer is still in the way. 4585 */ 4586 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4587 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4588 /* 4589 * is it the timer driving us? if so are the reader/writers 4590 * gone? 4591 */ 4592 if (stcb->asoc.refcnt) { 4593 /* nope, reader or writer in the way */ 4594 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4595 /* no asoc destroyed */ 4596 SCTP_TCB_UNLOCK(stcb); 4597#ifdef SCTP_LOG_CLOSING 4598 sctp_log_closing(inp, stcb, 8); 4599#endif 4600 return (0); 4601 } 4602 } 4603 /* now clean up any other timers */ 4604 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4605 asoc->hb_timer.self = NULL; 4606 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4607 asoc->dack_timer.self = NULL; 4608 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4609 /*- 4610 * For stream reset we don't blast this unless 4611 * it is a str-reset timer, it might be the 4612 * free-asoc timer which we DON'T want to 4613 * disturb. 4614 */ 4615 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4616 asoc->strreset_timer.self = NULL; 4617 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4618 asoc->asconf_timer.self = NULL; 4619 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4620 asoc->autoclose_timer.self = NULL; 4621 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4622 asoc->shut_guard_timer.self = NULL; 4623 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4624 asoc->delayed_event_timer.self = NULL; 4625 /* Mobility adaptation */ 4626 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4627 asoc->delete_prim_timer.self = NULL; 4628 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4629 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4630 net->fr_timer.self = NULL; 4631 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4632 net->rxt_timer.self = NULL; 4633 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4634 net->pmtu_timer.self = NULL; 4635 } 4636 /* Now the read queue needs to be cleaned up (only once) */ 4637 cnt = 0; 4638 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4639 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4640 SCTP_INP_READ_LOCK(inp); 4641 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4642 if (sq->stcb == stcb) { 4643 sq->do_not_ref_stcb = 1; 4644 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4645 /* 4646 * If there is no end, there never will be 4647 * now. 4648 */ 4649 if (sq->end_added == 0) { 4650 /* Held for PD-API clear that. */ 4651 sq->pdapi_aborted = 1; 4652 sq->held_length = 0; 4653 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4654 /* 4655 * Need to add a PD-API 4656 * aborted indication. 4657 * Setting the control_pdapi 4658 * assures that it will be 4659 * added right after this 4660 * msg. 4661 */ 4662 uint32_t strseq; 4663 4664 stcb->asoc.control_pdapi = sq; 4665 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4666 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4667 stcb, 4668 SCTP_PARTIAL_DELIVERY_ABORTED, 4669 (void *)&strseq, 4670 SCTP_SO_LOCKED); 4671 stcb->asoc.control_pdapi = NULL; 4672 } 4673 } 4674 /* Add an end to wake them */ 4675 sq->end_added = 1; 4676 cnt++; 4677 } 4678 } 4679 SCTP_INP_READ_UNLOCK(inp); 4680 if (stcb->block_entry) { 4681 cnt++; 4682 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4683 stcb->block_entry->error = ECONNRESET; 4684 stcb->block_entry = NULL; 4685 } 4686 } 4687 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4688 /* 4689 * Someone holds a reference OR the socket is unaccepted 4690 * yet. 4691 */ 4692 if ((stcb->asoc.refcnt) || 4693 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4694 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4695 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4696 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4697 } 4698 SCTP_TCB_UNLOCK(stcb); 4699 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4700 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4701 /* nothing around */ 4702 so = NULL; 4703 if (so) { 4704 /* Wake any reader/writers */ 4705 sctp_sorwakeup(inp, so); 4706 sctp_sowwakeup(inp, so); 4707 } 4708#ifdef SCTP_LOG_CLOSING 4709 sctp_log_closing(inp, stcb, 9); 4710#endif 4711 /* no asoc destroyed */ 4712 return (0); 4713 } 4714#ifdef SCTP_LOG_CLOSING 4715 sctp_log_closing(inp, stcb, 10); 4716#endif 4717 /* 4718 * When I reach here, no others want to kill the assoc yet.. and I 4719 * own the lock. Now its possible an abort comes in when I do the 4720 * lock exchange below to grab all the locks to do the final take 4721 * out. to prevent this we increment the count, which will start a 4722 * timer and blow out above thus assuring us that we hold exclusive 4723 * killing of the asoc. Note that after getting back the TCB lock we 4724 * will go ahead and increment the counter back up and stop any 4725 * timer a passing stranger may have started :-S 4726 */ 4727 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4728 atomic_add_int(&stcb->asoc.refcnt, 1); 4729 4730 SCTP_TCB_UNLOCK(stcb); 4731 SCTP_INP_INFO_WLOCK(); 4732 SCTP_INP_WLOCK(inp); 4733 SCTP_TCB_LOCK(stcb); 4734 } 4735 /* Double check the GONE flag */ 4736 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4737 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4738 /* nothing around */ 4739 so = NULL; 4740 4741 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4742 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4743 /* 4744 * For TCP type we need special handling when we are 4745 * connected. We also include the peel'ed off ones to. 4746 */ 4747 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4748 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4749 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4750 if (so) { 4751 SOCK_LOCK(so); 4752 if (so->so_rcv.sb_cc == 0) { 4753 so->so_state &= ~(SS_ISCONNECTING | 4754 SS_ISDISCONNECTING | 4755 SS_ISCONFIRMING | 4756 SS_ISCONNECTED); 4757 } 4758 socantrcvmore_locked(so); 4759 sctp_sowwakeup(inp, so); 4760 sctp_sorwakeup(inp, so); 4761 SCTP_SOWAKEUP(so); 4762 } 4763 } 4764 } 4765 /* 4766 * Make it invalid too, that way if its about to run it will abort 4767 * and return. 4768 */ 4769 /* re-increment the lock */ 4770 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4771 atomic_add_int(&stcb->asoc.refcnt, -1); 4772 } 4773 if (stcb->asoc.refcnt) { 4774 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4775 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4776 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4777 SCTP_INP_INFO_WUNLOCK(); 4778 SCTP_INP_WUNLOCK(inp); 4779 } 4780 SCTP_TCB_UNLOCK(stcb); 4781 return (0); 4782 } 4783 asoc->state = 0; 4784 if (inp->sctp_tcbhash) { 4785 LIST_REMOVE(stcb, sctp_tcbhash); 4786 } 4787 if (stcb->asoc.in_asocid_hash) { 4788 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4789 } 4790 /* Now lets remove it from the list of ALL associations in the EP */ 4791 LIST_REMOVE(stcb, sctp_tcblist); 4792 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4793 SCTP_INP_INCR_REF(inp); 4794 SCTP_INP_WUNLOCK(inp); 4795 } 4796 /* pull from vtag hash */ 4797 LIST_REMOVE(stcb, sctp_asocs); 4798 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4799 inp->sctp_lport, stcb->rport); 4800 4801 /* 4802 * Now restop the timers to be sure this is paranoia at is finest! 4803 */ 4804 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4805 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4806 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4807 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4808 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4809 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4810 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4811 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4812 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4813 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4814 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4815 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4816 } 4817 4818 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4819 prev = NULL; 4820 /* 4821 * The chunk lists and such SHOULD be empty but we check them just 4822 * in case. 4823 */ 4824 /* anything on the wheel needs to be removed */ 4825 for (i = 0; i < asoc->streamoutcnt; i++) { 4826 struct sctp_stream_out *outs; 4827 4828 outs = &asoc->strmout[i]; 4829 /* now clean up any chunks here */ 4830 sp = TAILQ_FIRST(&outs->outqueue); 4831 while (sp) { 4832 TAILQ_REMOVE(&outs->outqueue, sp, next); 4833 if (sp->data) { 4834 if (so) { 4835 /* Still an open socket - report */ 4836 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4837 SCTP_NOTIFY_DATAGRAM_UNSENT, 4838 (void *)sp, 0); 4839 } 4840 if (sp->data) { 4841 sctp_m_freem(sp->data); 4842 sp->data = NULL; 4843 sp->tail_mbuf = NULL; 4844 } 4845 } 4846 sctp_free_remote_addr(sp->net); 4847 sctp_free_spbufspace(stcb, asoc, sp); 4848 if (sp->holds_key_ref) 4849 sctp_auth_key_release(stcb, sp->auth_keyid); 4850 /* Free the zone stuff */ 4851 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 4852 SCTP_DECR_STRMOQ_COUNT(); 4853 /* sa_ignore FREED_MEMORY */ 4854 sp = TAILQ_FIRST(&outs->outqueue); 4855 } 4856 } 4857 4858 /* sa_ignore FREED_MEMORY */ 4859 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { 4860 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); 4861 SCTP_FREE(liste, SCTP_M_STRESET); 4862 } 4863 4864 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 4865 while (sq) { 4866 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4867 if (sq->data) { 4868 sctp_m_freem(sq->data); 4869 sq->data = NULL; 4870 } 4871 sctp_free_remote_addr(sq->whoFrom); 4872 sq->whoFrom = NULL; 4873 sq->stcb = NULL; 4874 /* Free the ctl entry */ 4875 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4876 SCTP_DECR_READQ_COUNT(); 4877 /* sa_ignore FREED_MEMORY */ 4878 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 4879 } 4880 4881 chk = TAILQ_FIRST(&asoc->free_chunks); 4882 while (chk) { 4883 TAILQ_REMOVE(&asoc->free_chunks, 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_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4892 SCTP_DECR_CHK_COUNT(); 4893 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4894 asoc->free_chunk_cnt--; 4895 /* sa_ignore FREED_MEMORY */ 4896 chk = TAILQ_FIRST(&asoc->free_chunks); 4897 } 4898 /* pending send queue SHOULD be empty */ 4899 if (!TAILQ_EMPTY(&asoc->send_queue)) { 4900 chk = TAILQ_FIRST(&asoc->send_queue); 4901 while (chk) { 4902 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4903 if (chk->data) { 4904 if (so) { 4905 /* Still a socket? */ 4906 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 4907 SCTP_NOTIFY_DATAGRAM_UNSENT, chk, 0); 4908 } 4909 if (chk->data) { 4910 sctp_m_freem(chk->data); 4911 chk->data = NULL; 4912 } 4913 } 4914 if (chk->holds_key_ref) 4915 sctp_auth_key_release(stcb, chk->auth_keyid); 4916 ccnt++; 4917 sctp_free_remote_addr(chk->whoTo); 4918 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4919 SCTP_DECR_CHK_COUNT(); 4920 /* sa_ignore FREED_MEMORY */ 4921 chk = TAILQ_FIRST(&asoc->send_queue); 4922 } 4923 } 4924/* 4925 if (ccnt) { 4926 printf("Freed %d from send_queue\n", ccnt); 4927 ccnt = 0; 4928 } 4929*/ 4930 /* sent queue SHOULD be empty */ 4931 if (!TAILQ_EMPTY(&asoc->sent_queue)) { 4932 chk = TAILQ_FIRST(&asoc->sent_queue); 4933 while (chk) { 4934 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4935 if (chk->data) { 4936 if (so) { 4937 /* Still a socket? */ 4938 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 4939 SCTP_NOTIFY_DATAGRAM_SENT, chk, 0); 4940 } 4941 if (chk->data) { 4942 sctp_m_freem(chk->data); 4943 chk->data = NULL; 4944 } 4945 } 4946 if (chk->holds_key_ref) 4947 sctp_auth_key_release(stcb, chk->auth_keyid); 4948 ccnt++; 4949 sctp_free_remote_addr(chk->whoTo); 4950 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4951 SCTP_DECR_CHK_COUNT(); 4952 /* sa_ignore FREED_MEMORY */ 4953 chk = TAILQ_FIRST(&asoc->sent_queue); 4954 } 4955 } 4956/* 4957 if (ccnt) { 4958 printf("Freed %d from sent_queue\n", ccnt); 4959 ccnt = 0; 4960 } 4961*/ 4962 /* control queue MAY not be empty */ 4963 if (!TAILQ_EMPTY(&asoc->control_send_queue)) { 4964 chk = TAILQ_FIRST(&asoc->control_send_queue); 4965 while (chk) { 4966 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4967 if (chk->data) { 4968 sctp_m_freem(chk->data); 4969 chk->data = NULL; 4970 } 4971 if (chk->holds_key_ref) 4972 sctp_auth_key_release(stcb, chk->auth_keyid); 4973 ccnt++; 4974 sctp_free_remote_addr(chk->whoTo); 4975 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4976 SCTP_DECR_CHK_COUNT(); 4977 /* sa_ignore FREED_MEMORY */ 4978 chk = TAILQ_FIRST(&asoc->control_send_queue); 4979 } 4980 } 4981/* 4982 if (ccnt) { 4983 printf("Freed %d from ctrl_queue\n", ccnt); 4984 ccnt = 0; 4985 } 4986*/ 4987 4988 /* ASCONF queue MAY not be empty */ 4989 if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) { 4990 chk = TAILQ_FIRST(&asoc->asconf_send_queue); 4991 while (chk) { 4992 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4993 if (chk->data) { 4994 sctp_m_freem(chk->data); 4995 chk->data = NULL; 4996 } 4997 if (chk->holds_key_ref) 4998 sctp_auth_key_release(stcb, chk->auth_keyid); 4999 ccnt++; 5000 sctp_free_remote_addr(chk->whoTo); 5001 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5002 SCTP_DECR_CHK_COUNT(); 5003 /* sa_ignore FREED_MEMORY */ 5004 chk = TAILQ_FIRST(&asoc->asconf_send_queue); 5005 } 5006 } 5007/* 5008 if (ccnt) { 5009 printf("Freed %d from asconf_queue\n", ccnt); 5010 ccnt = 0; 5011 } 5012*/ 5013 if (!TAILQ_EMPTY(&asoc->reasmqueue)) { 5014 chk = TAILQ_FIRST(&asoc->reasmqueue); 5015 while (chk) { 5016 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5017 if (chk->data) { 5018 sctp_m_freem(chk->data); 5019 chk->data = NULL; 5020 } 5021 if (chk->holds_key_ref) 5022 sctp_auth_key_release(stcb, chk->auth_keyid); 5023 sctp_free_remote_addr(chk->whoTo); 5024 ccnt++; 5025 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5026 SCTP_DECR_CHK_COUNT(); 5027 /* sa_ignore FREED_MEMORY */ 5028 chk = TAILQ_FIRST(&asoc->reasmqueue); 5029 } 5030 } 5031/* 5032 if (ccnt) { 5033 printf("Freed %d from reasm_queue\n", ccnt); 5034 ccnt = 0; 5035 } 5036*/ 5037 if (asoc->mapping_array) { 5038 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5039 asoc->mapping_array = NULL; 5040 } 5041 if (asoc->nr_mapping_array) { 5042 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5043 asoc->nr_mapping_array = NULL; 5044 } 5045 /* the stream outs */ 5046 if (asoc->strmout) { 5047 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5048 asoc->strmout = NULL; 5049 } 5050 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5051 if (asoc->strmin) { 5052 struct sctp_queued_to_read *ctl; 5053 5054 for (i = 0; i < asoc->streamincnt; i++) { 5055 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { 5056 /* We have somethings on the streamin queue */ 5057 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 5058 while (ctl) { 5059 TAILQ_REMOVE(&asoc->strmin[i].inqueue, 5060 ctl, next); 5061 sctp_free_remote_addr(ctl->whoFrom); 5062 if (ctl->data) { 5063 sctp_m_freem(ctl->data); 5064 ctl->data = NULL; 5065 } 5066 /* 5067 * We don't free the address here 5068 * since all the net's were freed 5069 * above. 5070 */ 5071 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5072 SCTP_DECR_READQ_COUNT(); 5073 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 5074 } 5075 } 5076 } 5077 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5078 asoc->strmin = NULL; 5079 } 5080 asoc->streamincnt = 0; 5081 while (!TAILQ_EMPTY(&asoc->nets)) { 5082 /* sa_ignore FREED_MEMORY */ 5083 net = TAILQ_FIRST(&asoc->nets); 5084 /* pull from list */ 5085 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) { 5086#ifdef INVARIANTS 5087 panic("no net's left alloc'ed, or list points to itself"); 5088#endif 5089 break; 5090 } 5091 prev = net; 5092 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5093 sctp_free_remote_addr(net); 5094 } 5095 5096 while (!LIST_EMPTY(&asoc->sctp_restricted_addrs)) { 5097 /* sa_ignore FREED_MEMORY */ 5098 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); 5099 sctp_remove_laddr(laddr); 5100 } 5101 5102 /* pending asconf (address) parameters */ 5103 while (!TAILQ_EMPTY(&asoc->asconf_queue)) { 5104 /* sa_ignore FREED_MEMORY */ 5105 aparam = TAILQ_FIRST(&asoc->asconf_queue); 5106 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5107 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5108 } 5109 while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) { 5110 /* sa_ignore FREED_MEMORY */ 5111 aack = TAILQ_FIRST(&asoc->asconf_ack_sent); 5112 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5113 if (aack->data != NULL) { 5114 sctp_m_freem(aack->data); 5115 } 5116 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5117 } 5118 /* clean up auth stuff */ 5119 if (asoc->local_hmacs) 5120 sctp_free_hmaclist(asoc->local_hmacs); 5121 if (asoc->peer_hmacs) 5122 sctp_free_hmaclist(asoc->peer_hmacs); 5123 5124 if (asoc->local_auth_chunks) 5125 sctp_free_chunklist(asoc->local_auth_chunks); 5126 if (asoc->peer_auth_chunks) 5127 sctp_free_chunklist(asoc->peer_auth_chunks); 5128 5129 sctp_free_authinfo(&asoc->authinfo); 5130 5131 shared_key = LIST_FIRST(&asoc->shared_keys); 5132 while (shared_key) { 5133 LIST_REMOVE(shared_key, next); 5134 sctp_free_sharedkey(shared_key); 5135 /* sa_ignore FREED_MEMORY */ 5136 shared_key = LIST_FIRST(&asoc->shared_keys); 5137 } 5138 5139 /* Insert new items here :> */ 5140 5141 /* Get rid of LOCK */ 5142 SCTP_TCB_LOCK_DESTROY(stcb); 5143 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5144 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5145 SCTP_INP_INFO_WUNLOCK(); 5146 SCTP_INP_RLOCK(inp); 5147 } 5148#ifdef SCTP_TRACK_FREED_ASOCS 5149 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5150 /* now clean up the tasoc itself */ 5151 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5152 SCTP_DECR_ASOC_COUNT(); 5153 } else { 5154 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5155 } 5156#else 5157 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5158 SCTP_DECR_ASOC_COUNT(); 5159#endif 5160 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5161 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5162 /* 5163 * If its NOT the inp_free calling us AND sctp_close 5164 * as been called, we call back... 5165 */ 5166 SCTP_INP_RUNLOCK(inp); 5167 /* 5168 * This will start the kill timer (if we are the 5169 * lastone) since we hold an increment yet. But this 5170 * is the only safe way to do this since otherwise 5171 * if the socket closes at the same time we are here 5172 * we might collide in the cleanup. 5173 */ 5174 sctp_inpcb_free(inp, 5175 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5176 SCTP_CALLED_DIRECTLY_NOCMPSET); 5177 SCTP_INP_DECR_REF(inp); 5178 goto out_of; 5179 } else { 5180 /* The socket is still open. */ 5181 SCTP_INP_DECR_REF(inp); 5182 } 5183 } 5184 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5185 SCTP_INP_RUNLOCK(inp); 5186 } 5187out_of: 5188 /* destroyed the asoc */ 5189#ifdef SCTP_LOG_CLOSING 5190 sctp_log_closing(inp, NULL, 11); 5191#endif 5192 return (1); 5193} 5194 5195 5196 5197/* 5198 * determine if a destination is "reachable" based upon the addresses bound 5199 * to the current endpoint (e.g. only v4 or v6 currently bound) 5200 */ 5201/* 5202 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5203 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5204 * types bound as its endpoint 5205 */ 5206int 5207sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5208{ 5209 struct sctp_inpcb *inp; 5210 int answer; 5211 5212 /* 5213 * No locks here, the TCB, in all cases is already locked and an 5214 * assoc is up. There is either a INP lock by the caller applied (in 5215 * asconf case when deleting an address) or NOT in the HB case, 5216 * however if HB then the INP increment is up and the INP will not 5217 * be removed (on top of the fact that we have a TCB lock). So we 5218 * only want to read the sctp_flags, which is either bound-all or 5219 * not.. no protection needed since once an assoc is up you can't be 5220 * changing your binding. 5221 */ 5222 inp = stcb->sctp_ep; 5223 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5224 /* if bound all, destination is not restricted */ 5225 /* 5226 * RRS: Question during lock work: Is this correct? If you 5227 * are bound-all you still might need to obey the V4--V6 5228 * flags??? IMO this bound-all stuff needs to be removed! 5229 */ 5230 return (1); 5231 } 5232 /* NOTE: all "scope" checks are done when local addresses are added */ 5233 if (destaddr->sa_family == AF_INET6) { 5234 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5235 } else if (destaddr->sa_family == AF_INET) { 5236 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5237 } else { 5238 /* invalid family, so it's unreachable */ 5239 answer = 0; 5240 } 5241 return (answer); 5242} 5243 5244/* 5245 * update the inp_vflags on an endpoint 5246 */ 5247static void 5248sctp_update_ep_vflag(struct sctp_inpcb *inp) 5249{ 5250 struct sctp_laddr *laddr; 5251 5252 /* first clear the flag */ 5253 inp->ip_inp.inp.inp_vflag = 0; 5254 /* set the flag based on addresses on the ep list */ 5255 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5256 if (laddr->ifa == NULL) { 5257 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5258 __FUNCTION__); 5259 continue; 5260 } 5261 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5262 continue; 5263 } 5264 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 5265 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5266 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 5267 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5268 } 5269 } 5270} 5271 5272/* 5273 * Add the address to the endpoint local address list There is nothing to be 5274 * done if we are bound to all addresses 5275 */ 5276void 5277sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5278{ 5279 struct sctp_laddr *laddr; 5280 int fnd, error = 0; 5281 5282 fnd = 0; 5283 5284 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5285 /* You are already bound to all. You have it already */ 5286 return; 5287 } 5288 if (ifa->address.sa.sa_family == AF_INET6) { 5289 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5290 /* Can't bind a non-useable addr. */ 5291 return; 5292 } 5293 } 5294 /* first, is it already present? */ 5295 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5296 if (laddr->ifa == ifa) { 5297 fnd = 1; 5298 break; 5299 } 5300 } 5301 5302 if (fnd == 0) { 5303 /* Not in the ep list */ 5304 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5305 if (error != 0) 5306 return; 5307 inp->laddr_count++; 5308 /* update inp_vflag flags */ 5309 if (ifa->address.sa.sa_family == AF_INET6) { 5310 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5311 } else if (ifa->address.sa.sa_family == AF_INET) { 5312 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5313 } 5314 } 5315 return; 5316} 5317 5318 5319/* 5320 * select a new (hopefully reachable) destination net (should only be used 5321 * when we deleted an ep addr that is the only usable source address to reach 5322 * the destination net) 5323 */ 5324static void 5325sctp_select_primary_destination(struct sctp_tcb *stcb) 5326{ 5327 struct sctp_nets *net; 5328 5329 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5330 /* for now, we'll just pick the first reachable one we find */ 5331 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5332 continue; 5333 if (sctp_destination_is_reachable(stcb, 5334 (struct sockaddr *)&net->ro._l_addr)) { 5335 /* found a reachable destination */ 5336 stcb->asoc.primary_destination = net; 5337 } 5338 } 5339 /* I can't there from here! ...we're gonna die shortly... */ 5340} 5341 5342 5343/* 5344 * Delete the address from the endpoint local address list There is nothing 5345 * to be done if we are bound to all addresses 5346 */ 5347void 5348sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5349{ 5350 struct sctp_laddr *laddr; 5351 int fnd; 5352 5353 fnd = 0; 5354 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5355 /* You are already bound to all. You have it already */ 5356 return; 5357 } 5358 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5359 if (laddr->ifa == ifa) { 5360 fnd = 1; 5361 break; 5362 } 5363 } 5364 if (fnd && (inp->laddr_count < 2)) { 5365 /* can't delete unless there are at LEAST 2 addresses */ 5366 return; 5367 } 5368 if (fnd) { 5369 /* 5370 * clean up any use of this address go through our 5371 * associations and clear any last_used_address that match 5372 * this one for each assoc, see if a new primary_destination 5373 * is needed 5374 */ 5375 struct sctp_tcb *stcb; 5376 5377 /* clean up "next_addr_touse" */ 5378 if (inp->next_addr_touse == laddr) 5379 /* delete this address */ 5380 inp->next_addr_touse = NULL; 5381 5382 /* clean up "last_used_address" */ 5383 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5384 struct sctp_nets *net; 5385 5386 SCTP_TCB_LOCK(stcb); 5387 if (stcb->asoc.last_used_address == laddr) 5388 /* delete this address */ 5389 stcb->asoc.last_used_address = NULL; 5390 /* 5391 * Now spin through all the nets and purge any ref 5392 * to laddr 5393 */ 5394 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5395 if (net->ro._s_addr && 5396 (net->ro._s_addr->ifa == laddr->ifa)) { 5397 /* Yep, purge src address selected */ 5398 sctp_rtentry_t *rt; 5399 5400 /* delete this address if cached */ 5401 rt = net->ro.ro_rt; 5402 if (rt != NULL) { 5403 RTFREE(rt); 5404 net->ro.ro_rt = NULL; 5405 } 5406 sctp_free_ifa(net->ro._s_addr); 5407 net->ro._s_addr = NULL; 5408 net->src_addr_selected = 0; 5409 } 5410 } 5411 SCTP_TCB_UNLOCK(stcb); 5412 } /* for each tcb */ 5413 /* remove it from the ep list */ 5414 sctp_remove_laddr(laddr); 5415 inp->laddr_count--; 5416 /* update inp_vflag flags */ 5417 sctp_update_ep_vflag(inp); 5418 } 5419 return; 5420} 5421 5422/* 5423 * Add the address to the TCB local address restricted list. 5424 * This is a "pending" address list (eg. addresses waiting for an 5425 * ASCONF-ACK response) and cannot be used as a valid source address. 5426 */ 5427void 5428sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5429{ 5430 struct sctp_inpcb *inp; 5431 struct sctp_laddr *laddr; 5432 struct sctpladdr *list; 5433 5434 /* 5435 * Assumes TCB is locked.. and possibly the INP. May need to 5436 * confirm/fix that if we need it and is not the case. 5437 */ 5438 list = &stcb->asoc.sctp_restricted_addrs; 5439 5440 inp = stcb->sctp_ep; 5441 if (ifa->address.sa.sa_family == AF_INET6) { 5442 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5443 /* Can't bind a non-existent addr. */ 5444 return; 5445 } 5446 } 5447 /* does the address already exist? */ 5448 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5449 if (laddr->ifa == ifa) { 5450 return; 5451 } 5452 } 5453 5454 /* add to the list */ 5455 (void)sctp_insert_laddr(list, ifa, 0); 5456 return; 5457} 5458 5459/* 5460 * insert an laddr entry with the given ifa for the desired list 5461 */ 5462int 5463sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5464{ 5465 struct sctp_laddr *laddr; 5466 5467 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5468 if (laddr == NULL) { 5469 /* out of memory? */ 5470 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5471 return (EINVAL); 5472 } 5473 SCTP_INCR_LADDR_COUNT(); 5474 bzero(laddr, sizeof(*laddr)); 5475 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5476 laddr->ifa = ifa; 5477 laddr->action = act; 5478 atomic_add_int(&ifa->refcount, 1); 5479 /* insert it */ 5480 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5481 5482 return (0); 5483} 5484 5485/* 5486 * Remove an laddr entry from the local address list (on an assoc) 5487 */ 5488void 5489sctp_remove_laddr(struct sctp_laddr *laddr) 5490{ 5491 5492 /* remove from the list */ 5493 LIST_REMOVE(laddr, sctp_nxt_addr); 5494 sctp_free_ifa(laddr->ifa); 5495 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5496 SCTP_DECR_LADDR_COUNT(); 5497} 5498 5499/* 5500 * Remove a local address from the TCB local address restricted list 5501 */ 5502void 5503sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5504{ 5505 struct sctp_inpcb *inp; 5506 struct sctp_laddr *laddr; 5507 5508 /* 5509 * This is called by asconf work. It is assumed that a) The TCB is 5510 * locked and b) The INP is locked. This is true in as much as I can 5511 * trace through the entry asconf code where I did these locks. 5512 * Again, the ASCONF code is a bit different in that it does lock 5513 * the INP during its work often times. This must be since we don't 5514 * want other proc's looking up things while what they are looking 5515 * up is changing :-D 5516 */ 5517 5518 inp = stcb->sctp_ep; 5519 /* if subset bound and don't allow ASCONF's, can't delete last */ 5520 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5521 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5522 if (stcb->sctp_ep->laddr_count < 2) { 5523 /* can't delete last address */ 5524 return; 5525 } 5526 } 5527 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5528 /* remove the address if it exists */ 5529 if (laddr->ifa == NULL) 5530 continue; 5531 if (laddr->ifa == ifa) { 5532 sctp_remove_laddr(laddr); 5533 return; 5534 } 5535 } 5536 5537 /* address not found! */ 5538 return; 5539} 5540 5541/* 5542 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5543 */ 5544/* sysctl */ 5545static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5546static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5547 5548void 5549sctp_pcb_init() 5550{ 5551 /* 5552 * SCTP initialization for the PCB structures should be called by 5553 * the sctp_init() funciton. 5554 */ 5555 int i; 5556 struct timeval tv; 5557 5558 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5559 /* error I was called twice */ 5560 return; 5561 } 5562 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5563 5564#if defined(SCTP_LOCAL_TRACE_BUF) 5565 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5566#endif 5567 (void)SCTP_GETTIME_TIMEVAL(&tv); 5568#if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5569 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5570 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5571#else 5572 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5573 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5574#endif 5575 /* init the empty list of (All) Endpoints */ 5576 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5577 5578 5579 /* init the hash table of endpoints */ 5580 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5581 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5582 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5583 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5584 &SCTP_BASE_INFO(hashasocmark)); 5585 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5586 &SCTP_BASE_INFO(hashmark)); 5587 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5588 &SCTP_BASE_INFO(hashtcpmark)); 5589 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5590 5591 5592 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5593 &SCTP_BASE_INFO(hashvrfmark)); 5594 5595 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5596 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5597 /* init the zones */ 5598 /* 5599 * FIX ME: Should check for NULL returns, but if it does fail we are 5600 * doomed to panic anyways... add later maybe. 5601 */ 5602 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5603 sizeof(struct sctp_inpcb), maxsockets); 5604 5605 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5606 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5607 5608 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5609 sizeof(struct sctp_laddr), 5610 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5611 5612 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5613 sizeof(struct sctp_nets), 5614 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5615 5616 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5617 sizeof(struct sctp_tmit_chunk), 5618 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5619 5620 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5621 sizeof(struct sctp_queued_to_read), 5622 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5623 5624 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5625 sizeof(struct sctp_stream_queue_pending), 5626 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5627 5628 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5629 sizeof(struct sctp_asconf), 5630 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5631 5632 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5633 sizeof(struct sctp_asconf_ack), 5634 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5635 5636 5637 /* Master Lock INIT for info structure */ 5638 SCTP_INP_INFO_LOCK_INIT(); 5639 SCTP_STATLOG_INIT_LOCK(); 5640 5641 SCTP_IPI_COUNT_INIT(); 5642 SCTP_IPI_ADDR_INIT(); 5643#ifdef SCTP_PACKET_LOGGING 5644 SCTP_IP_PKTLOG_INIT(); 5645#endif 5646 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5647 5648 SCTP_WQ_ADDR_INIT(); 5649 /* not sure if we need all the counts */ 5650 SCTP_BASE_INFO(ipi_count_ep) = 0; 5651 /* assoc/tcb zone info */ 5652 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5653 /* local addrlist zone info */ 5654 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5655 /* remote addrlist zone info */ 5656 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5657 /* chunk info */ 5658 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5659 5660 /* socket queue zone info */ 5661 SCTP_BASE_INFO(ipi_count_readq) = 0; 5662 5663 /* stream out queue cont */ 5664 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5665 5666 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5667 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5668 5669 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5670 5671 /* Init the TIMEWAIT list */ 5672 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5673 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5674 } 5675 5676 sctp_startup_iterator(); 5677 5678 /* 5679 * INIT the default VRF which for BSD is the only one, other O/S's 5680 * may have more. But initially they must start with one and then 5681 * add the VRF's as addresses are added. 5682 */ 5683 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5684 5685} 5686 5687/* 5688 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5689 */ 5690void 5691sctp_pcb_finish(void) 5692{ 5693 struct sctp_vrflist *vrf_bucket; 5694 struct sctp_vrf *vrf; 5695 struct sctp_ifn *ifn; 5696 struct sctp_ifa *ifa; 5697 struct sctpvtaghead *chain; 5698 struct sctp_tagblock *twait_block, *prev_twait_block; 5699 struct sctp_laddr *wi; 5700 int i; 5701 5702 /* 5703 * Free BSD the it thread never exits but we do clean up. The only 5704 * way freebsd reaches here if we have VRF's but we still add the 5705 * ifdef to make it compile on old versions. 5706 */ 5707 { 5708 struct sctp_iterator *it, *nit; 5709 5710 SCTP_IPI_ITERATOR_WQ_LOCK(); 5711 it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead); 5712 while (it) { 5713 nit = TAILQ_NEXT(it, sctp_nxt_itr); 5714 if (it->vn != curvnet) { 5715 it = nit; 5716 continue; 5717 } 5718 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 5719 it, sctp_nxt_itr); 5720 if (it->function_atend != NULL) { 5721 (*it->function_atend) (it->pointer, it->val); 5722 } 5723 SCTP_FREE(it, SCTP_M_ITER); 5724 it = nit; 5725 } 5726 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5727 SCTP_ITERATOR_LOCK(); 5728 if ((sctp_it_ctl.cur_it) && 5729 (sctp_it_ctl.cur_it->vn == curvnet)) { 5730 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5731 } 5732 SCTP_ITERATOR_UNLOCK(); 5733 } 5734 5735 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5736 SCTP_WQ_ADDR_LOCK(); 5737 while ((wi = LIST_FIRST(&SCTP_BASE_INFO(addr_wq))) != NULL) { 5738 LIST_REMOVE(wi, sctp_nxt_addr); 5739 SCTP_DECR_LADDR_COUNT(); 5740 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5741 } 5742 SCTP_WQ_ADDR_UNLOCK(); 5743 5744 /* 5745 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5746 * destroyed first). 5747 */ 5748 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5749 while ((vrf = LIST_FIRST(vrf_bucket)) != NULL) { 5750 while ((ifn = LIST_FIRST(&vrf->ifnlist)) != NULL) { 5751 while ((ifa = LIST_FIRST(&ifn->ifalist)) != NULL) { 5752 /* free the ifa */ 5753 LIST_REMOVE(ifa, next_bucket); 5754 LIST_REMOVE(ifa, next_ifa); 5755 SCTP_FREE(ifa, SCTP_M_IFA); 5756 } 5757 /* free the ifn */ 5758 LIST_REMOVE(ifn, next_bucket); 5759 LIST_REMOVE(ifn, next_ifn); 5760 SCTP_FREE(ifn, SCTP_M_IFN); 5761 } 5762 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5763 /* free the vrf */ 5764 LIST_REMOVE(vrf, next_vrf); 5765 SCTP_FREE(vrf, SCTP_M_VRF); 5766 } 5767 /* free the vrf hashes */ 5768 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5769 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5770 5771 /* 5772 * free the TIMEWAIT list elements malloc'd in the function 5773 * sctp_add_vtag_to_timewait()... 5774 */ 5775 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5776 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5777 if (!LIST_EMPTY(chain)) { 5778 prev_twait_block = NULL; 5779 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5780 if (prev_twait_block) { 5781 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5782 } 5783 prev_twait_block = twait_block; 5784 } 5785 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5786 } 5787 } 5788 5789 /* free the locks and mutexes */ 5790#ifdef SCTP_PACKET_LOGGING 5791 SCTP_IP_PKTLOG_DESTROY(); 5792#endif 5793 SCTP_IPI_ADDR_DESTROY(); 5794 SCTP_STATLOG_DESTROY(); 5795 SCTP_INP_INFO_LOCK_DESTROY(); 5796 5797 SCTP_WQ_ADDR_DESTROY(); 5798 5799 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5800 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5801 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5802 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5803 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5804 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5805 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5806 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5807 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5808 /* Get rid of other stuff to */ 5809 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5810 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5811 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5812 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5813 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5814 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5815 5816} 5817 5818 5819int 5820sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5821 int iphlen, int offset, int limit, struct sctphdr *sh, 5822 struct sockaddr *altsa) 5823{ 5824 /* 5825 * grub through the INIT pulling addresses and loading them to the 5826 * nets structure in the asoc. The from address in the mbuf should 5827 * also be loaded (if it is not already). This routine can be called 5828 * with either INIT or INIT-ACK's as long as the m points to the IP 5829 * packet and the offset points to the beginning of the parameters. 5830 */ 5831 struct sctp_inpcb *inp, *l_inp; 5832 struct sctp_nets *net, *net_tmp; 5833 struct ip *iph; 5834 struct sctp_paramhdr *phdr, parm_buf; 5835 struct sctp_tcb *stcb_tmp; 5836 uint16_t ptype, plen; 5837 struct sockaddr *sa; 5838 struct sockaddr_storage dest_store; 5839 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 5840 struct sockaddr_in sin; 5841 struct sockaddr_in6 sin6; 5842 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5843 struct sctp_auth_random *p_random = NULL; 5844 uint16_t random_len = 0; 5845 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5846 struct sctp_auth_hmac_algo *hmacs = NULL; 5847 uint16_t hmacs_len = 0; 5848 uint8_t saw_asconf = 0; 5849 uint8_t saw_asconf_ack = 0; 5850 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 5851 struct sctp_auth_chunk_list *chunks = NULL; 5852 uint16_t num_chunks = 0; 5853 sctp_key_t *new_key; 5854 uint32_t keylen; 5855 int got_random = 0, got_hmacs = 0, got_chklist = 0; 5856 5857 /* First get the destination address setup too. */ 5858 memset(&sin, 0, sizeof(sin)); 5859 memset(&sin6, 0, sizeof(sin6)); 5860 5861 sin.sin_family = AF_INET; 5862 sin.sin_len = sizeof(sin); 5863 sin.sin_port = stcb->rport; 5864 5865 sin6.sin6_family = AF_INET6; 5866 sin6.sin6_len = sizeof(struct sockaddr_in6); 5867 sin6.sin6_port = stcb->rport; 5868 if (altsa == NULL) { 5869 iph = mtod(m, struct ip *); 5870 switch (iph->ip_v) { 5871 case IPVERSION: 5872 { 5873 /* its IPv4 */ 5874 struct sockaddr_in *sin_2; 5875 5876 sin_2 = (struct sockaddr_in *)(local_sa); 5877 memset(sin_2, 0, sizeof(sin)); 5878 sin_2->sin_family = AF_INET; 5879 sin_2->sin_len = sizeof(sin); 5880 sin_2->sin_port = sh->dest_port; 5881 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 5882 sin.sin_addr = iph->ip_src; 5883 sa = (struct sockaddr *)&sin; 5884 break; 5885 } 5886#ifdef INET6 5887 case IPV6_VERSION >> 4: 5888 { 5889 /* its IPv6 */ 5890 struct ip6_hdr *ip6; 5891 struct sockaddr_in6 *sin6_2; 5892 5893 ip6 = mtod(m, struct ip6_hdr *); 5894 sin6_2 = (struct sockaddr_in6 *)(local_sa); 5895 memset(sin6_2, 0, sizeof(sin6)); 5896 sin6_2->sin6_family = AF_INET6; 5897 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 5898 sin6_2->sin6_port = sh->dest_port; 5899 sin6.sin6_addr = ip6->ip6_src; 5900 sa = (struct sockaddr *)&sin6; 5901 break; 5902 } 5903#endif 5904 default: 5905 return (-1); 5906 break; 5907 } 5908 } else { 5909 /* 5910 * For cookies we use the src address NOT from the packet 5911 * but from the original INIT 5912 */ 5913 sa = altsa; 5914 } 5915 /* Turn off ECN until we get through all params */ 5916 stcb->asoc.ecn_allowed = 0; 5917 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5918 /* mark all addresses that we have currently on the list */ 5919 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 5920 } 5921 /* does the source address already exist? if so skip it */ 5922 l_inp = inp = stcb->sctp_ep; 5923 5924 atomic_add_int(&stcb->asoc.refcnt, 1); 5925 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 5926 atomic_add_int(&stcb->asoc.refcnt, -1); 5927 5928 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 5929 /* we must add the source address */ 5930 /* no scope set here since we have a tcb already. */ 5931 if ((sa->sa_family == AF_INET) && 5932 (stcb->asoc.ipv4_addr_legal)) { 5933 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 5934 return (-1); 5935 } 5936 } else if ((sa->sa_family == AF_INET6) && 5937 (stcb->asoc.ipv6_addr_legal)) { 5938 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 5939 return (-2); 5940 } 5941 } 5942 } else { 5943 if (net_tmp != NULL && stcb_tmp == stcb) { 5944 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 5945 } else if (stcb_tmp != stcb) { 5946 /* It belongs to another association? */ 5947 if (stcb_tmp) 5948 SCTP_TCB_UNLOCK(stcb_tmp); 5949 return (-3); 5950 } 5951 } 5952 if (stcb->asoc.state == 0) { 5953 /* the assoc was freed? */ 5954 return (-4); 5955 } 5956 /* 5957 * peer must explicitly turn this on. This may have been initialized 5958 * to be "on" in order to allow local addr changes while INIT's are 5959 * in flight. 5960 */ 5961 stcb->asoc.peer_supports_asconf = 0; 5962 /* now we must go through each of the params. */ 5963 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 5964 while (phdr) { 5965 ptype = ntohs(phdr->param_type); 5966 plen = ntohs(phdr->param_length); 5967 /* 5968 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 5969 * (int)plen); 5970 */ 5971 if (offset + plen > limit) { 5972 break; 5973 } 5974 if (plen == 0) { 5975 break; 5976 } 5977 if (ptype == SCTP_IPV4_ADDRESS) { 5978 if (stcb->asoc.ipv4_addr_legal) { 5979 struct sctp_ipv4addr_param *p4, p4_buf; 5980 5981 /* ok get the v4 address and check/add */ 5982 phdr = sctp_get_next_param(m, offset, 5983 (struct sctp_paramhdr *)&p4_buf, 5984 sizeof(p4_buf)); 5985 if (plen != sizeof(struct sctp_ipv4addr_param) || 5986 phdr == NULL) { 5987 return (-5); 5988 } 5989 p4 = (struct sctp_ipv4addr_param *)phdr; 5990 sin.sin_addr.s_addr = p4->addr; 5991 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 5992 /* Skip multi-cast addresses */ 5993 goto next_param; 5994 } 5995 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 5996 (sin.sin_addr.s_addr == INADDR_ANY)) { 5997 goto next_param; 5998 } 5999 sa = (struct sockaddr *)&sin; 6000 inp = stcb->sctp_ep; 6001 atomic_add_int(&stcb->asoc.refcnt, 1); 6002 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6003 local_sa, stcb); 6004 atomic_add_int(&stcb->asoc.refcnt, -1); 6005 6006 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6007 inp == NULL) { 6008 /* we must add the source address */ 6009 /* 6010 * no scope set since we have a tcb 6011 * already 6012 */ 6013 6014 /* 6015 * we must validate the state again 6016 * here 6017 */ 6018 add_it_now: 6019 if (stcb->asoc.state == 0) { 6020 /* the assoc was freed? */ 6021 return (-7); 6022 } 6023 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6024 return (-8); 6025 } 6026 } else if (stcb_tmp == stcb) { 6027 if (stcb->asoc.state == 0) { 6028 /* the assoc was freed? */ 6029 return (-10); 6030 } 6031 if (net != NULL) { 6032 /* clear flag */ 6033 net->dest_state &= 6034 ~SCTP_ADDR_NOT_IN_ASSOC; 6035 } 6036 } else { 6037 /* 6038 * strange, address is in another 6039 * assoc? straighten out locks. 6040 */ 6041 if (stcb_tmp) { 6042 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6043 /* 6044 * in setup state we 6045 * abort this guy 6046 */ 6047 sctp_abort_an_association(stcb_tmp->sctp_ep, 6048 stcb_tmp, 1, NULL, 0); 6049 goto add_it_now; 6050 } 6051 SCTP_TCB_UNLOCK(stcb_tmp); 6052 } 6053 if (stcb->asoc.state == 0) { 6054 /* the assoc was freed? */ 6055 return (-12); 6056 } 6057 return (-13); 6058 } 6059 } 6060 } else if (ptype == SCTP_IPV6_ADDRESS) { 6061 if (stcb->asoc.ipv6_addr_legal) { 6062 /* ok get the v6 address and check/add */ 6063 struct sctp_ipv6addr_param *p6, p6_buf; 6064 6065 phdr = sctp_get_next_param(m, offset, 6066 (struct sctp_paramhdr *)&p6_buf, 6067 sizeof(p6_buf)); 6068 if (plen != sizeof(struct sctp_ipv6addr_param) || 6069 phdr == NULL) { 6070 return (-14); 6071 } 6072 p6 = (struct sctp_ipv6addr_param *)phdr; 6073 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6074 sizeof(p6->addr)); 6075 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6076 /* Skip multi-cast addresses */ 6077 goto next_param; 6078 } 6079 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6080 /* 6081 * Link local make no sense without 6082 * scope 6083 */ 6084 goto next_param; 6085 } 6086 sa = (struct sockaddr *)&sin6; 6087 inp = stcb->sctp_ep; 6088 atomic_add_int(&stcb->asoc.refcnt, 1); 6089 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6090 local_sa, stcb); 6091 atomic_add_int(&stcb->asoc.refcnt, -1); 6092 if (stcb_tmp == NULL && 6093 (inp == stcb->sctp_ep || inp == NULL)) { 6094 /* 6095 * we must validate the state again 6096 * here 6097 */ 6098 add_it_now6: 6099 if (stcb->asoc.state == 0) { 6100 /* the assoc was freed? */ 6101 return (-16); 6102 } 6103 /* 6104 * we must add the address, no scope 6105 * set 6106 */ 6107 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6108 return (-17); 6109 } 6110 } else if (stcb_tmp == stcb) { 6111 /* 6112 * we must validate the state again 6113 * here 6114 */ 6115 if (stcb->asoc.state == 0) { 6116 /* the assoc was freed? */ 6117 return (-19); 6118 } 6119 if (net != NULL) { 6120 /* clear flag */ 6121 net->dest_state &= 6122 ~SCTP_ADDR_NOT_IN_ASSOC; 6123 } 6124 } else { 6125 /* 6126 * strange, address is in another 6127 * assoc? straighten out locks. 6128 */ 6129 if (stcb_tmp) 6130 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6131 /* 6132 * in setup state we 6133 * abort this guy 6134 */ 6135 sctp_abort_an_association(stcb_tmp->sctp_ep, 6136 stcb_tmp, 1, NULL, 0); 6137 goto add_it_now6; 6138 } 6139 SCTP_TCB_UNLOCK(stcb_tmp); 6140 6141 if (stcb->asoc.state == 0) { 6142 /* the assoc was freed? */ 6143 return (-21); 6144 } 6145 return (-22); 6146 } 6147 } 6148 } else if (ptype == SCTP_ECN_CAPABLE) { 6149 stcb->asoc.ecn_allowed = 1; 6150 } else if (ptype == SCTP_ULP_ADAPTATION) { 6151 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6152 struct sctp_adaptation_layer_indication ai, 6153 *aip; 6154 6155 phdr = sctp_get_next_param(m, offset, 6156 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6157 aip = (struct sctp_adaptation_layer_indication *)phdr; 6158 if (aip) { 6159 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6160 stcb->asoc.adaptation_needed = 1; 6161 } 6162 } 6163 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6164 struct sctp_asconf_addr_param lstore, *fee; 6165 struct sctp_asconf_addrv4_param *fii; 6166 int lptype; 6167 struct sockaddr *lsa = NULL; 6168 6169 stcb->asoc.peer_supports_asconf = 1; 6170 if (plen > sizeof(lstore)) { 6171 return (-23); 6172 } 6173 phdr = sctp_get_next_param(m, offset, 6174 (struct sctp_paramhdr *)&lstore, 6175 min(plen, sizeof(lstore))); 6176 if (phdr == NULL) { 6177 return (-24); 6178 } 6179 fee = (struct sctp_asconf_addr_param *)phdr; 6180 lptype = ntohs(fee->addrp.ph.param_type); 6181 if (lptype == SCTP_IPV4_ADDRESS) { 6182 if (plen != 6183 sizeof(struct sctp_asconf_addrv4_param)) { 6184 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6185 (int)sizeof(struct sctp_asconf_addrv4_param), 6186 plen); 6187 } else { 6188 fii = (struct sctp_asconf_addrv4_param *)fee; 6189 sin.sin_addr.s_addr = fii->addrp.addr; 6190 lsa = (struct sockaddr *)&sin; 6191 } 6192 } else if (lptype == SCTP_IPV6_ADDRESS) { 6193 if (plen != 6194 sizeof(struct sctp_asconf_addr_param)) { 6195 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6196 (int)sizeof(struct sctp_asconf_addr_param), 6197 plen); 6198 } else { 6199 memcpy(sin6.sin6_addr.s6_addr, 6200 fee->addrp.addr, 6201 sizeof(fee->addrp.addr)); 6202 lsa = (struct sockaddr *)&sin6; 6203 } 6204 } 6205 if (lsa) { 6206 (void)sctp_set_primary_addr(stcb, sa, NULL); 6207 } 6208 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6209 stcb->asoc.peer_supports_nat = 1; 6210 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6211 /* Peer supports pr-sctp */ 6212 stcb->asoc.peer_supports_prsctp = 1; 6213 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6214 /* A supported extension chunk */ 6215 struct sctp_supported_chunk_types_param *pr_supported; 6216 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6217 int num_ent, i; 6218 6219 phdr = sctp_get_next_param(m, offset, 6220 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6221 if (phdr == NULL) { 6222 return (-25); 6223 } 6224 stcb->asoc.peer_supports_asconf = 0; 6225 stcb->asoc.peer_supports_prsctp = 0; 6226 stcb->asoc.peer_supports_pktdrop = 0; 6227 stcb->asoc.peer_supports_strreset = 0; 6228 stcb->asoc.peer_supports_nr_sack = 0; 6229 stcb->asoc.peer_supports_auth = 0; 6230 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6231 num_ent = plen - sizeof(struct sctp_paramhdr); 6232 for (i = 0; i < num_ent; i++) { 6233 switch (pr_supported->chunk_types[i]) { 6234 case SCTP_ASCONF: 6235 case SCTP_ASCONF_ACK: 6236 stcb->asoc.peer_supports_asconf = 1; 6237 break; 6238 case SCTP_FORWARD_CUM_TSN: 6239 stcb->asoc.peer_supports_prsctp = 1; 6240 break; 6241 case SCTP_PACKET_DROPPED: 6242 stcb->asoc.peer_supports_pktdrop = 1; 6243 break; 6244 case SCTP_NR_SELECTIVE_ACK: 6245 stcb->asoc.peer_supports_nr_sack = 1; 6246 break; 6247 case SCTP_STREAM_RESET: 6248 stcb->asoc.peer_supports_strreset = 1; 6249 break; 6250 case SCTP_AUTHENTICATION: 6251 stcb->asoc.peer_supports_auth = 1; 6252 break; 6253 default: 6254 /* one I have not learned yet */ 6255 break; 6256 6257 } 6258 } 6259 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 6260 /* Peer supports ECN-nonce */ 6261 stcb->asoc.peer_supports_ecn_nonce = 1; 6262 stcb->asoc.ecn_nonce_allowed = 1; 6263 } else if (ptype == SCTP_RANDOM) { 6264 if (plen > sizeof(random_store)) 6265 break; 6266 if (got_random) { 6267 /* already processed a RANDOM */ 6268 goto next_param; 6269 } 6270 phdr = sctp_get_next_param(m, offset, 6271 (struct sctp_paramhdr *)random_store, 6272 min(sizeof(random_store), plen)); 6273 if (phdr == NULL) 6274 return (-26); 6275 p_random = (struct sctp_auth_random *)phdr; 6276 random_len = plen - sizeof(*p_random); 6277 /* enforce the random length */ 6278 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6279 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6280 return (-27); 6281 } 6282 got_random = 1; 6283 } else if (ptype == SCTP_HMAC_LIST) { 6284 int num_hmacs; 6285 int i; 6286 6287 if (plen > sizeof(hmacs_store)) 6288 break; 6289 if (got_hmacs) { 6290 /* already processed a HMAC list */ 6291 goto next_param; 6292 } 6293 phdr = sctp_get_next_param(m, offset, 6294 (struct sctp_paramhdr *)hmacs_store, 6295 min(plen, sizeof(hmacs_store))); 6296 if (phdr == NULL) 6297 return (-28); 6298 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6299 hmacs_len = plen - sizeof(*hmacs); 6300 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6301 /* validate the hmac list */ 6302 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6303 return (-29); 6304 } 6305 if (stcb->asoc.peer_hmacs != NULL) 6306 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6307 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6308 if (stcb->asoc.peer_hmacs != NULL) { 6309 for (i = 0; i < num_hmacs; i++) { 6310 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6311 ntohs(hmacs->hmac_ids[i])); 6312 } 6313 } 6314 got_hmacs = 1; 6315 } else if (ptype == SCTP_CHUNK_LIST) { 6316 int i; 6317 6318 if (plen > sizeof(chunks_store)) 6319 break; 6320 if (got_chklist) { 6321 /* already processed a Chunks list */ 6322 goto next_param; 6323 } 6324 phdr = sctp_get_next_param(m, offset, 6325 (struct sctp_paramhdr *)chunks_store, 6326 min(plen, sizeof(chunks_store))); 6327 if (phdr == NULL) 6328 return (-30); 6329 chunks = (struct sctp_auth_chunk_list *)phdr; 6330 num_chunks = plen - sizeof(*chunks); 6331 if (stcb->asoc.peer_auth_chunks != NULL) 6332 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6333 else 6334 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6335 for (i = 0; i < num_chunks; i++) { 6336 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6337 stcb->asoc.peer_auth_chunks); 6338 /* record asconf/asconf-ack if listed */ 6339 if (chunks->chunk_types[i] == SCTP_ASCONF) 6340 saw_asconf = 1; 6341 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6342 saw_asconf_ack = 1; 6343 6344 } 6345 got_chklist = 1; 6346 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6347 (ptype == SCTP_STATE_COOKIE) || 6348 (ptype == SCTP_UNRECOG_PARAM) || 6349 (ptype == SCTP_COOKIE_PRESERVE) || 6350 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6351 (ptype == SCTP_ADD_IP_ADDRESS) || 6352 (ptype == SCTP_DEL_IP_ADDRESS) || 6353 (ptype == SCTP_ERROR_CAUSE_IND) || 6354 (ptype == SCTP_SUCCESS_REPORT)) { 6355 /* don't care */ ; 6356 } else { 6357 if ((ptype & 0x8000) == 0x0000) { 6358 /* 6359 * must stop processing the rest of the 6360 * param's. Any report bits were handled 6361 * with the call to 6362 * sctp_arethere_unrecognized_parameters() 6363 * when the INIT or INIT-ACK was first seen. 6364 */ 6365 break; 6366 } 6367 } 6368 6369next_param: 6370 offset += SCTP_SIZE32(plen); 6371 if (offset >= limit) { 6372 break; 6373 } 6374 phdr = sctp_get_next_param(m, offset, &parm_buf, 6375 sizeof(parm_buf)); 6376 } 6377 /* Now check to see if we need to purge any addresses */ 6378 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { 6379 net_tmp = TAILQ_NEXT(net, sctp_next); 6380 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6381 SCTP_ADDR_NOT_IN_ASSOC) { 6382 /* This address has been removed from the asoc */ 6383 /* remove and free it */ 6384 stcb->asoc.numnets--; 6385 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6386 sctp_free_remote_addr(net); 6387 if (net == stcb->asoc.primary_destination) { 6388 stcb->asoc.primary_destination = NULL; 6389 sctp_select_primary_destination(stcb); 6390 } 6391 } 6392 } 6393 /* validate authentication required parameters */ 6394 if (got_random && got_hmacs) { 6395 stcb->asoc.peer_supports_auth = 1; 6396 } else { 6397 stcb->asoc.peer_supports_auth = 0; 6398 } 6399 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6400 /* peer does not support auth but sent a chunks list? */ 6401 return (-31); 6402 } 6403 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6404 !stcb->asoc.peer_supports_auth) { 6405 /* peer supports asconf but not auth? */ 6406 return (-32); 6407 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6408 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6409 return (-33); 6410 } 6411 /* concatenate the full random key */ 6412 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6413 if (chunks != NULL) { 6414 keylen += sizeof(*chunks) + num_chunks; 6415 } 6416 new_key = sctp_alloc_key(keylen); 6417 if (new_key != NULL) { 6418 /* copy in the RANDOM */ 6419 if (p_random != NULL) { 6420 keylen = sizeof(*p_random) + random_len; 6421 bcopy(p_random, new_key->key, keylen); 6422 } 6423 /* append in the AUTH chunks */ 6424 if (chunks != NULL) { 6425 bcopy(chunks, new_key->key + keylen, 6426 sizeof(*chunks) + num_chunks); 6427 keylen += sizeof(*chunks) + num_chunks; 6428 } 6429 /* append in the HMACs */ 6430 if (hmacs != NULL) { 6431 bcopy(hmacs, new_key->key + keylen, 6432 sizeof(*hmacs) + hmacs_len); 6433 } 6434 } else { 6435 /* failed to get memory for the key */ 6436 return (-34); 6437 } 6438 if (stcb->asoc.authinfo.peer_random != NULL) 6439 sctp_free_key(stcb->asoc.authinfo.peer_random); 6440 stcb->asoc.authinfo.peer_random = new_key; 6441 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6442 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6443 6444 return (0); 6445} 6446 6447int 6448sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6449 struct sctp_nets *net) 6450{ 6451 /* make sure the requested primary address exists in the assoc */ 6452 if (net == NULL && sa) 6453 net = sctp_findnet(stcb, sa); 6454 6455 if (net == NULL) { 6456 /* didn't find the requested primary address! */ 6457 return (-1); 6458 } else { 6459 /* set the primary address */ 6460 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6461 /* Must be confirmed, so queue to set */ 6462 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6463 return (0); 6464 } 6465 stcb->asoc.primary_destination = net; 6466 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 6467 net = TAILQ_FIRST(&stcb->asoc.nets); 6468 if (net != stcb->asoc.primary_destination) { 6469 /* 6470 * first one on the list is NOT the primary 6471 * sctp_cmpaddr() is much more efficent if the 6472 * primary is the first on the list, make it so. 6473 */ 6474 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6475 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6476 } 6477 return (0); 6478 } 6479} 6480 6481int 6482sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6483{ 6484 /* 6485 * This function serves two purposes. It will see if a TAG can be 6486 * re-used and return 1 for yes it is ok and 0 for don't use that 6487 * tag. A secondary function it will do is purge out old tags that 6488 * can be removed. 6489 */ 6490 struct sctpvtaghead *chain; 6491 struct sctp_tagblock *twait_block; 6492 struct sctpasochead *head; 6493 struct sctp_tcb *stcb; 6494 int i; 6495 6496 SCTP_INP_INFO_RLOCK(); 6497 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6498 SCTP_BASE_INFO(hashasocmark))]; 6499 if (head == NULL) { 6500 /* invalid vtag */ 6501 goto skip_vtag_check; 6502 } 6503 LIST_FOREACH(stcb, head, sctp_asocs) { 6504 /* 6505 * We choose not to lock anything here. TCB's can't be 6506 * removed since we have the read lock, so they can't be 6507 * freed on us, same thing for the INP. I may be wrong with 6508 * this assumption, but we will go with it for now :-) 6509 */ 6510 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6511 continue; 6512 } 6513 if (stcb->asoc.my_vtag == tag) { 6514 /* candidate */ 6515 if (stcb->rport != rport) { 6516 continue; 6517 } 6518 if (stcb->sctp_ep->sctp_lport != lport) { 6519 continue; 6520 } 6521 /* Its a used tag set */ 6522 SCTP_INP_INFO_RUNLOCK(); 6523 return (0); 6524 } 6525 } 6526skip_vtag_check: 6527 6528 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6529 /* Now what about timed wait ? */ 6530 if (!LIST_EMPTY(chain)) { 6531 /* 6532 * Block(s) are present, lets see if we have this tag in the 6533 * list 6534 */ 6535 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6536 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6537 if (twait_block->vtag_block[i].v_tag == 0) { 6538 /* not used */ 6539 continue; 6540 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6541 now->tv_sec) { 6542 /* Audit expires this guy */ 6543 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6544 twait_block->vtag_block[i].v_tag = 0; 6545 twait_block->vtag_block[i].lport = 0; 6546 twait_block->vtag_block[i].rport = 0; 6547 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6548 (twait_block->vtag_block[i].lport == lport) && 6549 (twait_block->vtag_block[i].rport == rport)) { 6550 /* Bad tag, sorry :< */ 6551 SCTP_INP_INFO_RUNLOCK(); 6552 return (0); 6553 } 6554 } 6555 } 6556 } 6557 SCTP_INP_INFO_RUNLOCK(); 6558 return (1); 6559} 6560 6561 6562static sctp_assoc_t reneged_asoc_ids[256]; 6563static uint8_t reneged_at = 0; 6564 6565 6566static void 6567sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6568{ 6569 /* 6570 * We must hunt this association for MBUF's past the cumack (i.e. 6571 * out of order data that we can renege on). 6572 */ 6573 struct sctp_association *asoc; 6574 struct sctp_tmit_chunk *chk, *nchk; 6575 uint32_t cumulative_tsn_p1; 6576 struct sctp_queued_to_read *ctl, *nctl; 6577 int cnt, strmat; 6578 uint32_t gap, i; 6579 int fnd = 0; 6580 6581 /* We look for anything larger than the cum-ack + 1 */ 6582 6583 asoc = &stcb->asoc; 6584 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6585 /* none we can reneg on. */ 6586 return; 6587 } 6588 SCTP_STAT_INCR(sctps_protocol_drains_done); 6589 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6590 cnt = 0; 6591 /* First look in the re-assembly queue */ 6592 chk = TAILQ_FIRST(&asoc->reasmqueue); 6593 while (chk) { 6594 /* Get the next one */ 6595 nchk = TAILQ_NEXT(chk, sctp_next); 6596 if (compare_with_wrap(chk->rec.data.TSN_seq, 6597 cumulative_tsn_p1, MAX_TSN)) { 6598 /* Yep it is above cum-ack */ 6599 cnt++; 6600 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6601 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6602 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6603 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6604 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6605 if (chk->data) { 6606 sctp_m_freem(chk->data); 6607 chk->data = NULL; 6608 } 6609 sctp_free_a_chunk(stcb, chk); 6610 } 6611 chk = nchk; 6612 } 6613 /* Ok that was fun, now we will drain all the inbound streams? */ 6614 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6615 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); 6616 while (ctl) { 6617 nctl = TAILQ_NEXT(ctl, next); 6618 if (compare_with_wrap(ctl->sinfo_tsn, 6619 cumulative_tsn_p1, MAX_TSN)) { 6620 /* Yep it is above cum-ack */ 6621 cnt++; 6622 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6623 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6624 sctp_ucount_decr(asoc->cnt_on_all_streams); 6625 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6626 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6627 if (ctl->data) { 6628 sctp_m_freem(ctl->data); 6629 ctl->data = NULL; 6630 } 6631 sctp_free_remote_addr(ctl->whoFrom); 6632 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6633 SCTP_DECR_READQ_COUNT(); 6634 } 6635 ctl = nctl; 6636 } 6637 } 6638 if (cnt) { 6639 /* We must back down to see what the new highest is */ 6640 for (i = asoc->highest_tsn_inside_map; 6641 (compare_with_wrap(i, asoc->mapping_array_base_tsn, MAX_TSN) || (i == asoc->mapping_array_base_tsn)); 6642 i--) { 6643 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6644 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6645 asoc->highest_tsn_inside_map = i; 6646 fnd = 1; 6647 break; 6648 } 6649 } 6650 if (!fnd) { 6651 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6652 } 6653 /* 6654 * Question, should we go through the delivery queue? The 6655 * only reason things are on here is the app not reading OR 6656 * a p-d-api up. An attacker COULD send enough in to 6657 * initiate the PD-API and then send a bunch of stuff to 6658 * other streams... these would wind up on the delivery 6659 * queue.. and then we would not get to them. But in order 6660 * to do this I then have to back-track and un-deliver 6661 * sequence numbers in streams.. el-yucko. I think for now 6662 * we will NOT look at the delivery queue and leave it to be 6663 * something to consider later. An alternative would be to 6664 * abort the P-D-API with a notification and then deliver 6665 * the data.... Or another method might be to keep track of 6666 * how many times the situation occurs and if we see a 6667 * possible attack underway just abort the association. 6668 */ 6669#ifdef SCTP_DEBUG 6670 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6671#endif 6672 /* 6673 * Now do we need to find a new 6674 * asoc->highest_tsn_inside_map? 6675 */ 6676 asoc->last_revoke_count = cnt; 6677 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6678 /* sa_ignore NO_NULL_CHK */ 6679 sctp_send_sack(stcb); 6680 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6681 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 6682 reneged_at++; 6683 } 6684 /* 6685 * Another issue, in un-setting the TSN's in the mapping array we 6686 * DID NOT adjust the higest_tsn marker. This will cause one of two 6687 * things to occur. It may cause us to do extra work in checking for 6688 * our mapping array movement. More importantly it may cause us to 6689 * SACK every datagram. This may not be a bad thing though since we 6690 * will recover once we get our cum-ack above and all this stuff we 6691 * dumped recovered. 6692 */ 6693} 6694 6695void 6696sctp_drain() 6697{ 6698 /* 6699 * We must walk the PCB lists for ALL associations here. The system 6700 * is LOW on MBUF's and needs help. This is where reneging will 6701 * occur. We really hope this does NOT happen! 6702 */ 6703 VNET_ITERATOR_DECL(vnet_iter); 6704 VNET_LIST_RLOCK_NOSLEEP(); 6705 VNET_FOREACH(vnet_iter) { 6706 CURVNET_SET(vnet_iter); 6707 struct sctp_inpcb *inp; 6708 struct sctp_tcb *stcb; 6709 6710 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6711 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6712#ifdef VIMAGE 6713 continue; 6714#else 6715 return; 6716#endif 6717 } 6718 SCTP_INP_INFO_RLOCK(); 6719 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6720 /* For each endpoint */ 6721 SCTP_INP_RLOCK(inp); 6722 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6723 /* For each association */ 6724 SCTP_TCB_LOCK(stcb); 6725 sctp_drain_mbufs(inp, stcb); 6726 SCTP_TCB_UNLOCK(stcb); 6727 } 6728 SCTP_INP_RUNLOCK(inp); 6729 } 6730 SCTP_INP_INFO_RUNLOCK(); 6731 CURVNET_RESTORE(); 6732 } 6733 VNET_LIST_RUNLOCK_NOSLEEP(); 6734} 6735 6736/* 6737 * start a new iterator 6738 * iterates through all endpoints and associations based on the pcb_state 6739 * flags and asoc_state. "af" (mandatory) is executed for all matching 6740 * assocs and "ef" (optional) is executed when the iterator completes. 6741 * "inpf" (optional) is executed for each new endpoint as it is being 6742 * iterated through. inpe (optional) is called when the inp completes 6743 * its way through all the stcbs. 6744 */ 6745int 6746sctp_initiate_iterator(inp_func inpf, 6747 asoc_func af, 6748 inp_func inpe, 6749 uint32_t pcb_state, 6750 uint32_t pcb_features, 6751 uint32_t asoc_state, 6752 void *argp, 6753 uint32_t argi, 6754 end_func ef, 6755 struct sctp_inpcb *s_inp, 6756 uint8_t chunk_output_off) 6757{ 6758 struct sctp_iterator *it = NULL; 6759 6760 if (af == NULL) { 6761 return (-1); 6762 } 6763 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6764 SCTP_M_ITER); 6765 if (it == NULL) { 6766 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6767 return (ENOMEM); 6768 } 6769 memset(it, 0, sizeof(*it)); 6770 it->function_assoc = af; 6771 it->function_inp = inpf; 6772 if (inpf) 6773 it->done_current_ep = 0; 6774 else 6775 it->done_current_ep = 1; 6776 it->function_atend = ef; 6777 it->pointer = argp; 6778 it->val = argi; 6779 it->pcb_flags = pcb_state; 6780 it->pcb_features = pcb_features; 6781 it->asoc_state = asoc_state; 6782 it->function_inp_end = inpe; 6783 it->no_chunk_output = chunk_output_off; 6784 it->vn = curvnet; 6785 if (s_inp) { 6786 /* Assume lock is held here */ 6787 it->inp = s_inp; 6788 SCTP_INP_INCR_REF(it->inp); 6789 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6790 } else { 6791 SCTP_INP_INFO_RLOCK(); 6792 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6793 if (it->inp) { 6794 SCTP_INP_INCR_REF(it->inp); 6795 } 6796 SCTP_INP_INFO_RUNLOCK(); 6797 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6798 6799 } 6800 SCTP_IPI_ITERATOR_WQ_LOCK(); 6801 6802 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6803 if (sctp_it_ctl.iterator_running == 0) { 6804 sctp_wakeup_iterator(); 6805 } 6806 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6807 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6808 return (0); 6809} 6810