1 /*- 2 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * a) Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * b) Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the distribution. 13 * 14 * c) Neither the name of Cisco Systems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_header.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_timer.h> 47 #include <netinet/sctp_bsd_addr.h> 48 #include <netinet/udp.h> 49 50 51 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 56 int 57 SCTP6_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(MOD_INET6, MODULE_GLOBAL(MOD_INET6, 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(MOD_INET6, MODULE_GLOBAL(MOD_INET6, 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 74 void 75 sctp_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 */ 138 139 struct sctp_vrf * 140 sctp_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 } 185 186 187 struct sctp_ifn * 188 sctp_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 } 208 209 210 211 struct sctp_vrf * 212 sctp_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 } 225 226 void 227 sctp_free_vrf(struct sctp_vrf *vrf) 228 { 229 int ret; 230 231 ret = atomic_fetchadd_int(&vrf->refcount, -1); 232 if (ret == 1) { 233 if (vrf->vrf_addr_hash) { 234 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 235 vrf->vrf_addr_hash = NULL; 236 } 237 /* We zero'd the count */ 238 LIST_REMOVE(vrf, next_vrf); 239 SCTP_FREE(vrf, SCTP_M_VRF); 240 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 241 } 242 } 243 244 void 245 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 246 { 247 int ret; 248 249 ret = atomic_fetchadd_int(&sctp_ifnp->refcount, -1); 250 if (ret == 1) { 251 /* We zero'd the count */ 252 if (sctp_ifnp->vrf) { 253 sctp_free_vrf(sctp_ifnp->vrf); 254 } 255 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 256 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 257 } 258 } 259 260 void 261 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 262 { 263 struct sctp_ifn *sctp_ifnp; 264 265 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 266 if (sctp_ifnp != NULL) { 267 sctp_ifnp->ifn_mtu = mtu; 268 } 269 } 270 271 272 void 273 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 274 { 275 int ret; 276 277 ret = atomic_fetchadd_int(&sctp_ifap->refcount, -1); 278 if (ret == 1) { 279 /* We zero'd the count */ 280 if (sctp_ifap->ifn_p) { 281 sctp_free_ifn(sctp_ifap->ifn_p); 282 } 283 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 284 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 285 } 286 } 287 288 static void 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 290 { 291 struct sctp_ifn *found; 292 293 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 294 if (found == NULL) { 295 /* Not in the list.. sorry */ 296 return; 297 } 298 if (hold_addr_lock == 0) 299 SCTP_IPI_ADDR_WLOCK(); 300 LIST_REMOVE(sctp_ifnp, next_bucket); 301 LIST_REMOVE(sctp_ifnp, next_ifn); 302 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 303 sctp_ifnp->registered_af); 304 if (hold_addr_lock == 0) 305 SCTP_IPI_ADDR_WUNLOCK(); 306 /* Take away the reference, and possibly free it */ 307 sctp_free_ifn(sctp_ifnp); 308 } 309 310 void 311 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 312 const char *if_name, uint32_t ifn_index) 313 { 314 struct sctp_vrf *vrf; 315 struct sctp_ifa *sctp_ifap = NULL; 316 317 SCTP_IPI_ADDR_RLOCK(); 318 vrf = sctp_find_vrf(vrf_id); 319 if (vrf == NULL) { 320 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 321 goto out; 322 323 } 324 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 325 if (sctp_ifap == NULL) { 326 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 327 goto out; 328 } 329 if (sctp_ifap->ifn_p == NULL) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 331 goto out; 332 } 333 if (if_name) { 334 int len1, len2; 335 336 len1 = strlen(if_name); 337 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 338 if (len1 != len2) { 339 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n", 340 len1, len2); 341 goto out; 342 } 343 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 345 sctp_ifap->ifn_p->ifn_name, 346 if_name); 347 goto out; 348 } 349 } else { 350 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 351 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 352 sctp_ifap->ifn_p->ifn_index, ifn_index); 353 goto out; 354 } 355 } 356 357 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 358 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 359 out: 360 SCTP_IPI_ADDR_RUNLOCK(); 361 } 362 363 void 364 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 365 const char *if_name, uint32_t ifn_index) 366 { 367 struct sctp_vrf *vrf; 368 struct sctp_ifa *sctp_ifap = NULL; 369 370 SCTP_IPI_ADDR_RLOCK(); 371 vrf = sctp_find_vrf(vrf_id); 372 if (vrf == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 374 goto out; 375 376 } 377 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 378 if (sctp_ifap == NULL) { 379 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 380 goto out; 381 } 382 if (sctp_ifap->ifn_p == NULL) { 383 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 384 goto out; 385 } 386 if (if_name) { 387 int len1, len2; 388 389 len1 = strlen(if_name); 390 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 391 if (len1 != len2) { 392 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n", 393 len1, len2); 394 goto out; 395 } 396 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 397 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 398 sctp_ifap->ifn_p->ifn_name, 399 if_name); 400 goto out; 401 } 402 } else { 403 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 404 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 405 sctp_ifap->ifn_p->ifn_index, ifn_index); 406 goto out; 407 } 408 } 409 410 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 411 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 412 out: 413 SCTP_IPI_ADDR_RUNLOCK(); 414 } 415 416 /*- 417 * Add an ifa to an ifn. 418 * Register the interface as necessary. 419 * NOTE: ADDR write lock MUST be held. 420 */ 421 static void 422 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 423 { 424 int ifa_af; 425 426 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 427 sctp_ifap->ifn_p = sctp_ifnp; 428 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 429 /* update address counts */ 430 sctp_ifnp->ifa_count++; 431 ifa_af = sctp_ifap->address.sa.sa_family; 432 if (ifa_af == AF_INET) 433 sctp_ifnp->num_v4++; 434 else 435 sctp_ifnp->num_v6++; 436 if (sctp_ifnp->ifa_count == 1) { 437 /* register the new interface */ 438 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 439 sctp_ifnp->registered_af = ifa_af; 440 } 441 } 442 443 /*- 444 * Remove an ifa from its ifn. 445 * If no more addresses exist, remove the ifn too. Otherwise, re-register 446 * the interface based on the remaining address families left. 447 * NOTE: ADDR write lock MUST be held. 448 */ 449 static void 450 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 451 { 452 uint32_t ifn_index; 453 454 LIST_REMOVE(sctp_ifap, next_ifa); 455 if (sctp_ifap->ifn_p) { 456 /* update address counts */ 457 sctp_ifap->ifn_p->ifa_count--; 458 if (sctp_ifap->address.sa.sa_family == AF_INET6) 459 sctp_ifap->ifn_p->num_v6--; 460 else if (sctp_ifap->address.sa.sa_family == AF_INET) 461 sctp_ifap->ifn_p->num_v4--; 462 463 ifn_index = sctp_ifap->ifn_p->ifn_index; 464 if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 465 /* remove the ifn, possibly freeing it */ 466 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 467 } else { 468 /* re-register address family type, if needed */ 469 if ((sctp_ifap->ifn_p->num_v6 == 0) && 470 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 471 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6); 472 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET); 473 sctp_ifap->ifn_p->registered_af = AF_INET; 474 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 475 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 476 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET); 477 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6); 478 sctp_ifap->ifn_p->registered_af = AF_INET6; 479 } 480 /* free the ifn refcount */ 481 sctp_free_ifn(sctp_ifap->ifn_p); 482 } 483 sctp_ifap->ifn_p = NULL; 484 } 485 } 486 487 struct sctp_ifa * 488 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 489 uint32_t ifn_type, const char *if_name, void *ifa, 490 struct sockaddr *addr, uint32_t ifa_flags, 491 int dynamic_add) 492 { 493 struct sctp_vrf *vrf; 494 struct sctp_ifn *sctp_ifnp = NULL; 495 struct sctp_ifa *sctp_ifap = NULL; 496 struct sctp_ifalist *hash_addr_head; 497 struct sctp_ifnlist *hash_ifn_head; 498 uint32_t hash_of_addr; 499 int new_ifn_af = 0; 500 501 #ifdef SCTP_DEBUG 502 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 503 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 504 #endif 505 SCTP_IPI_ADDR_WLOCK(); 506 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 507 if (sctp_ifnp) { 508 vrf = sctp_ifnp->vrf; 509 } else { 510 vrf = sctp_find_vrf(vrf_id); 511 if (vrf == NULL) { 512 vrf = sctp_allocate_vrf(vrf_id); 513 if (vrf == NULL) { 514 SCTP_IPI_ADDR_WUNLOCK(); 515 return (NULL); 516 } 517 } 518 } 519 if (sctp_ifnp == NULL) { 520 /* 521 * build one and add it, can't hold lock until after malloc 522 * done though. 523 */ 524 SCTP_IPI_ADDR_WUNLOCK(); 525 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 526 sizeof(struct sctp_ifn), SCTP_M_IFN); 527 if (sctp_ifnp == NULL) { 528 #ifdef INVARIANTS 529 panic("No memory for IFN:%u", sctp_ifnp->ifn_index); 530 #endif 531 return (NULL); 532 } 533 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 534 sctp_ifnp->ifn_index = ifn_index; 535 sctp_ifnp->ifn_p = ifn; 536 sctp_ifnp->ifn_type = ifn_type; 537 sctp_ifnp->refcount = 0; 538 sctp_ifnp->vrf = vrf; 539 atomic_add_int(&vrf->refcount, 1); 540 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 541 if (if_name != NULL) { 542 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ); 543 } else { 544 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ)); 545 } 546 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 547 LIST_INIT(&sctp_ifnp->ifalist); 548 SCTP_IPI_ADDR_WLOCK(); 549 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 550 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 551 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 552 new_ifn_af = 1; 553 } 554 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 555 if (sctp_ifap) { 556 /* Hmm, it already exists? */ 557 if ((sctp_ifap->ifn_p) && 558 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 559 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 560 sctp_ifap->ifn_p->ifn_name, ifn_index, 561 sctp_ifap); 562 if (new_ifn_af) { 563 /* Remove the created one that we don't want */ 564 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 565 } 566 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 567 /* easy to solve, just switch back to active */ 568 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 569 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 570 sctp_ifap->ifn_p = sctp_ifnp; 571 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 572 } 573 exit_stage_left: 574 SCTP_IPI_ADDR_WUNLOCK(); 575 return (sctp_ifap); 576 } else { 577 if (sctp_ifap->ifn_p) { 578 /* 579 * The last IFN gets the address, removee 580 * the old one 581 */ 582 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 583 sctp_ifap, sctp_ifap->ifn_p->ifn_name, 584 sctp_ifap->ifn_p->ifn_index, if_name, 585 ifn_index); 586 /* remove the address from the old ifn */ 587 sctp_remove_ifa_from_ifn(sctp_ifap); 588 /* move the address over to the new ifn */ 589 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 590 goto exit_stage_left; 591 } else { 592 /* repair ifnp which was NULL ? */ 593 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 594 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 595 sctp_ifnp, sctp_ifap); 596 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 597 } 598 goto exit_stage_left; 599 } 600 } 601 SCTP_IPI_ADDR_WUNLOCK(); 602 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 603 if (sctp_ifap == NULL) { 604 #ifdef INVARIANTS 605 panic("No memory for IFA"); 606 #endif 607 return (NULL); 608 } 609 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 610 sctp_ifap->ifn_p = sctp_ifnp; 611 atomic_add_int(&sctp_ifnp->refcount, 1); 612 sctp_ifap->vrf_id = vrf_id; 613 sctp_ifap->ifa = ifa; 614 memcpy(&sctp_ifap->address, addr, addr->sa_len); 615 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 616 sctp_ifap->flags = ifa_flags; 617 /* Set scope */ 618 switch (sctp_ifap->address.sa.sa_family) { 619 case AF_INET: 620 { 621 struct sockaddr_in *sin; 622 623 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 624 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 625 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 626 sctp_ifap->src_is_loop = 1; 627 } 628 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 629 sctp_ifap->src_is_priv = 1; 630 } 631 sctp_ifnp->num_v4++; 632 if (new_ifn_af) 633 new_ifn_af = AF_INET; 634 break; 635 } 636 #ifdef INET6 637 case AF_INET6: 638 { 639 /* ok to use deprecated addresses? */ 640 struct sockaddr_in6 *sin6; 641 642 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 643 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 644 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 645 sctp_ifap->src_is_loop = 1; 646 } 647 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 648 sctp_ifap->src_is_priv = 1; 649 } 650 sctp_ifnp->num_v6++; 651 if (new_ifn_af) 652 new_ifn_af = AF_INET6; 653 break; 654 } 655 #endif 656 default: 657 new_ifn_af = 0; 658 break; 659 } 660 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 661 662 if ((sctp_ifap->src_is_priv == 0) && 663 (sctp_ifap->src_is_loop == 0)) { 664 sctp_ifap->src_is_glob = 1; 665 } 666 SCTP_IPI_ADDR_WLOCK(); 667 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 668 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 669 sctp_ifap->refcount = 1; 670 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 671 sctp_ifnp->ifa_count++; 672 vrf->total_ifa_count++; 673 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 674 if (new_ifn_af) { 675 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 676 sctp_ifnp->registered_af = new_ifn_af; 677 } 678 SCTP_IPI_ADDR_WUNLOCK(); 679 if (dynamic_add) { 680 /* 681 * Bump up the refcount so that when the timer completes it 682 * will drop back down. 683 */ 684 struct sctp_laddr *wi; 685 686 atomic_add_int(&sctp_ifap->refcount, 1); 687 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 688 if (wi == NULL) { 689 /* 690 * Gak, what can we do? We have lost an address 691 * change can you say HOSED? 692 */ 693 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 694 /* Opps, must decrement the count */ 695 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 696 if_name); 697 return (NULL); 698 } 699 SCTP_INCR_LADDR_COUNT(); 700 bzero(wi, sizeof(*wi)); 701 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 702 wi->ifa = sctp_ifap; 703 wi->action = SCTP_ADD_IP_ADDRESS; 704 SCTP_IPI_ITERATOR_WQ_LOCK(); 705 /* 706 * Should this really be a tailq? As it is we will process 707 * the newest first :-0 708 */ 709 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 710 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 711 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 712 (struct sctp_inpcb *)NULL, 713 (struct sctp_tcb *)NULL, 714 (struct sctp_nets *)NULL); 715 } else { 716 /* it's ready for use */ 717 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 718 } 719 return (sctp_ifap); 720 } 721 722 void 723 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 724 uint32_t ifn_index, const char *if_name) 725 { 726 struct sctp_vrf *vrf; 727 struct sctp_ifa *sctp_ifap = NULL; 728 729 SCTP_IPI_ADDR_WLOCK(); 730 vrf = sctp_find_vrf(vrf_id); 731 if (vrf == NULL) { 732 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 733 goto out_now; 734 } 735 #ifdef SCTP_DEBUG 736 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 737 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 738 #endif 739 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 740 if (sctp_ifap) { 741 /* Validate the delete */ 742 if (sctp_ifap->ifn_p) { 743 int valid = 0; 744 745 /*- 746 * The name has priority over the ifn_index 747 * if its given. We do this especially for 748 * panda who might recycle indexes fast. 749 */ 750 if (if_name) { 751 int len1, len2; 752 753 len1 = min(SCTP_IFNAMSIZ, strlen(if_name)); 754 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name)); 755 if (len1 && len2 && (len1 == len2)) { 756 /* we can compare them */ 757 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) { 758 /* 759 * They match its a correct 760 * delete 761 */ 762 valid = 1; 763 } 764 } 765 } 766 if (!valid) { 767 /* last ditch check ifn_index */ 768 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 769 valid = 1; 770 } 771 } 772 if (!valid) { 773 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 774 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 775 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 776 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 777 SCTP_IPI_ADDR_WUNLOCK(); 778 return; 779 } 780 } 781 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap); 782 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 783 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 784 vrf->total_ifa_count--; 785 LIST_REMOVE(sctp_ifap, next_bucket); 786 sctp_remove_ifa_from_ifn(sctp_ifap); 787 } 788 #ifdef SCTP_DEBUG 789 else { 790 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 791 ifn_index); 792 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 793 } 794 #endif 795 796 out_now: 797 SCTP_IPI_ADDR_WUNLOCK(); 798 if (sctp_ifap) { 799 struct sctp_laddr *wi; 800 801 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 802 if (wi == NULL) { 803 /* 804 * Gak, what can we do? We have lost an address 805 * change can you say HOSED? 806 */ 807 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 808 809 /* Oops, must decrement the count */ 810 sctp_free_ifa(sctp_ifap); 811 return; 812 } 813 SCTP_INCR_LADDR_COUNT(); 814 bzero(wi, sizeof(*wi)); 815 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 816 wi->ifa = sctp_ifap; 817 wi->action = SCTP_DEL_IP_ADDRESS; 818 SCTP_IPI_ITERATOR_WQ_LOCK(); 819 /* 820 * Should this really be a tailq? As it is we will process 821 * the newest first :-0 822 */ 823 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 824 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 825 826 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 827 (struct sctp_inpcb *)NULL, 828 (struct sctp_tcb *)NULL, 829 (struct sctp_nets *)NULL); 830 } 831 return; 832 } 833 834 835 static struct sctp_tcb * 836 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 837 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 838 { 839 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 840 /* 841 * If we support the TCP model, then we must now dig through to see 842 * if we can find our endpoint in the list of tcp ep's. 843 */ 844 uint16_t lport, rport; 845 struct sctppcbhead *ephead; 846 struct sctp_inpcb *inp; 847 struct sctp_laddr *laddr; 848 struct sctp_tcb *stcb; 849 struct sctp_nets *net; 850 851 if ((to == NULL) || (from == NULL)) { 852 return (NULL); 853 } 854 if (to->sa_family == AF_INET && from->sa_family == AF_INET) { 855 lport = ((struct sockaddr_in *)to)->sin_port; 856 rport = ((struct sockaddr_in *)from)->sin_port; 857 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) { 858 lport = ((struct sockaddr_in6 *)to)->sin6_port; 859 rport = ((struct sockaddr_in6 *)from)->sin6_port; 860 } else { 861 return NULL; 862 } 863 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), SCTP_BASE_INFO(hashtcpmark))]; 864 /* 865 * Ok now for each of the guys in this bucket we must look and see: 866 * - Does the remote port match. - Does there single association's 867 * addresses match this address (to). If so we update p_ep to point 868 * to this ep and return the tcb from it. 869 */ 870 LIST_FOREACH(inp, ephead, sctp_hash) { 871 SCTP_INP_RLOCK(inp); 872 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 873 SCTP_INP_RUNLOCK(inp); 874 continue; 875 } 876 if (lport != inp->sctp_lport) { 877 SCTP_INP_RUNLOCK(inp); 878 continue; 879 } 880 if (inp->def_vrf_id != vrf_id) { 881 SCTP_INP_RUNLOCK(inp); 882 continue; 883 } 884 /* check to see if the ep has one of the addresses */ 885 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 886 /* We are NOT bound all, so look further */ 887 int match = 0; 888 889 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 890 891 if (laddr->ifa == NULL) { 892 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 893 continue; 894 } 895 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 896 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 897 continue; 898 } 899 if (laddr->ifa->address.sa.sa_family == 900 to->sa_family) { 901 /* see if it matches */ 902 struct sockaddr_in *intf_addr, *sin; 903 904 intf_addr = &laddr->ifa->address.sin; 905 sin = (struct sockaddr_in *)to; 906 if (from->sa_family == AF_INET) { 907 if (sin->sin_addr.s_addr == 908 intf_addr->sin_addr.s_addr) { 909 match = 1; 910 break; 911 } 912 } 913 #ifdef INET6 914 if (from->sa_family == AF_INET6) { 915 struct sockaddr_in6 *intf_addr6; 916 struct sockaddr_in6 *sin6; 917 918 sin6 = (struct sockaddr_in6 *) 919 to; 920 intf_addr6 = &laddr->ifa->address.sin6; 921 922 if (SCTP6_ARE_ADDR_EQUAL(sin6, 923 intf_addr6)) { 924 match = 1; 925 break; 926 } 927 } 928 #endif 929 } 930 } 931 if (match == 0) { 932 /* This endpoint does not have this address */ 933 SCTP_INP_RUNLOCK(inp); 934 continue; 935 } 936 } 937 /* 938 * Ok if we hit here the ep has the address, does it hold 939 * the tcb? 940 */ 941 942 stcb = LIST_FIRST(&inp->sctp_asoc_list); 943 if (stcb == NULL) { 944 SCTP_INP_RUNLOCK(inp); 945 continue; 946 } 947 SCTP_TCB_LOCK(stcb); 948 if (stcb->rport != rport) { 949 /* remote port does not match. */ 950 SCTP_TCB_UNLOCK(stcb); 951 SCTP_INP_RUNLOCK(inp); 952 continue; 953 } 954 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 955 SCTP_TCB_UNLOCK(stcb); 956 SCTP_INP_RUNLOCK(inp); 957 continue; 958 } 959 /* Does this TCB have a matching address? */ 960 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 961 962 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 963 /* not the same family, can't be a match */ 964 continue; 965 } 966 switch (from->sa_family) { 967 case AF_INET: 968 { 969 struct sockaddr_in *sin, *rsin; 970 971 sin = (struct sockaddr_in *)&net->ro._l_addr; 972 rsin = (struct sockaddr_in *)from; 973 if (sin->sin_addr.s_addr == 974 rsin->sin_addr.s_addr) { 975 /* found it */ 976 if (netp != NULL) { 977 *netp = net; 978 } 979 /* 980 * Update the endpoint 981 * pointer 982 */ 983 *inp_p = inp; 984 SCTP_INP_RUNLOCK(inp); 985 return (stcb); 986 } 987 break; 988 } 989 #ifdef INET6 990 case AF_INET6: 991 { 992 struct sockaddr_in6 *sin6, *rsin6; 993 994 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 995 rsin6 = (struct sockaddr_in6 *)from; 996 if (SCTP6_ARE_ADDR_EQUAL(sin6, 997 rsin6)) { 998 /* found it */ 999 if (netp != NULL) { 1000 *netp = net; 1001 } 1002 /* 1003 * Update the endpoint 1004 * pointer 1005 */ 1006 *inp_p = inp; 1007 SCTP_INP_RUNLOCK(inp); 1008 return (stcb); 1009 } 1010 break; 1011 } 1012 #endif 1013 default: 1014 /* TSNH */ 1015 break; 1016 } 1017 } 1018 SCTP_TCB_UNLOCK(stcb); 1019 SCTP_INP_RUNLOCK(inp); 1020 } 1021 return (NULL); 1022 } 1023 1024 /* 1025 * rules for use 1026 * 1027 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1028 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1029 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1030 * NULL. 1031 */ 1032 1033 struct sctp_tcb * 1034 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1035 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1036 { 1037 struct sctpasochead *head; 1038 struct sctp_inpcb *inp; 1039 struct sctp_tcb *stcb = NULL; 1040 struct sctp_nets *net; 1041 uint16_t rport; 1042 1043 inp = *inp_p; 1044 if (remote->sa_family == AF_INET) { 1045 rport = (((struct sockaddr_in *)remote)->sin_port); 1046 } else if (remote->sa_family == AF_INET6) { 1047 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1048 } else { 1049 return (NULL); 1050 } 1051 if (locked_tcb) { 1052 /* 1053 * UN-lock so we can do proper locking here this occurs when 1054 * called from load_addresses_from_init. 1055 */ 1056 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1057 SCTP_TCB_UNLOCK(locked_tcb); 1058 } 1059 SCTP_INP_INFO_RLOCK(); 1060 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1061 /*- 1062 * Now either this guy is our listener or it's the 1063 * connector. If it is the one that issued the connect, then 1064 * it's only chance is to be the first TCB in the list. If 1065 * it is the acceptor, then do the special_lookup to hash 1066 * and find the real inp. 1067 */ 1068 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1069 /* to is peer addr, from is my addr */ 1070 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1071 netp, inp->def_vrf_id); 1072 if ((stcb != NULL) && (locked_tcb == NULL)) { 1073 /* we have a locked tcb, lower refcount */ 1074 SCTP_INP_DECR_REF(inp); 1075 } 1076 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1077 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1078 SCTP_TCB_LOCK(locked_tcb); 1079 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1080 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1081 } 1082 SCTP_INP_INFO_RUNLOCK(); 1083 return (stcb); 1084 } else { 1085 SCTP_INP_WLOCK(inp); 1086 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1087 goto null_return; 1088 } 1089 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1090 if (stcb == NULL) { 1091 goto null_return; 1092 } 1093 SCTP_TCB_LOCK(stcb); 1094 1095 if (stcb->rport != rport) { 1096 /* remote port does not match. */ 1097 SCTP_TCB_UNLOCK(stcb); 1098 goto null_return; 1099 } 1100 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1101 SCTP_TCB_UNLOCK(stcb); 1102 goto null_return; 1103 } 1104 /* now look at the list of remote addresses */ 1105 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1106 #ifdef INVARIANTS 1107 if (net == (TAILQ_NEXT(net, sctp_next))) { 1108 panic("Corrupt net list"); 1109 } 1110 #endif 1111 if (net->ro._l_addr.sa.sa_family != 1112 remote->sa_family) { 1113 /* not the same family */ 1114 continue; 1115 } 1116 switch (remote->sa_family) { 1117 case AF_INET: 1118 { 1119 struct sockaddr_in *sin, 1120 *rsin; 1121 1122 sin = (struct sockaddr_in *) 1123 &net->ro._l_addr; 1124 rsin = (struct sockaddr_in *)remote; 1125 if (sin->sin_addr.s_addr == 1126 rsin->sin_addr.s_addr) { 1127 /* found it */ 1128 if (netp != NULL) { 1129 *netp = net; 1130 } 1131 if (locked_tcb == NULL) { 1132 SCTP_INP_DECR_REF(inp); 1133 } else if (locked_tcb != stcb) { 1134 SCTP_TCB_LOCK(locked_tcb); 1135 } 1136 if (locked_tcb) { 1137 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1138 } 1139 SCTP_INP_WUNLOCK(inp); 1140 SCTP_INP_INFO_RUNLOCK(); 1141 return (stcb); 1142 } 1143 break; 1144 } 1145 #ifdef INET6 1146 case AF_INET6: 1147 { 1148 struct sockaddr_in6 *sin6, 1149 *rsin6; 1150 1151 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1152 rsin6 = (struct sockaddr_in6 *)remote; 1153 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1154 rsin6)) { 1155 /* found it */ 1156 if (netp != NULL) { 1157 *netp = net; 1158 } 1159 if (locked_tcb == NULL) { 1160 SCTP_INP_DECR_REF(inp); 1161 } else if (locked_tcb != stcb) { 1162 SCTP_TCB_LOCK(locked_tcb); 1163 } 1164 if (locked_tcb) { 1165 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1166 } 1167 SCTP_INP_WUNLOCK(inp); 1168 SCTP_INP_INFO_RUNLOCK(); 1169 return (stcb); 1170 } 1171 break; 1172 } 1173 #endif 1174 default: 1175 /* TSNH */ 1176 break; 1177 } 1178 } 1179 SCTP_TCB_UNLOCK(stcb); 1180 } 1181 } else { 1182 SCTP_INP_WLOCK(inp); 1183 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1184 goto null_return; 1185 } 1186 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1187 inp->sctp_hashmark)]; 1188 if (head == NULL) { 1189 goto null_return; 1190 } 1191 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1192 if (stcb->rport != rport) { 1193 /* remote port does not match */ 1194 continue; 1195 } 1196 SCTP_TCB_LOCK(stcb); 1197 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1198 SCTP_TCB_UNLOCK(stcb); 1199 continue; 1200 } 1201 /* now look at the list of remote addresses */ 1202 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1203 #ifdef INVARIANTS 1204 if (net == (TAILQ_NEXT(net, sctp_next))) { 1205 panic("Corrupt net list"); 1206 } 1207 #endif 1208 if (net->ro._l_addr.sa.sa_family != 1209 remote->sa_family) { 1210 /* not the same family */ 1211 continue; 1212 } 1213 switch (remote->sa_family) { 1214 case AF_INET: 1215 { 1216 struct sockaddr_in *sin, 1217 *rsin; 1218 1219 sin = (struct sockaddr_in *) 1220 &net->ro._l_addr; 1221 rsin = (struct sockaddr_in *)remote; 1222 if (sin->sin_addr.s_addr == 1223 rsin->sin_addr.s_addr) { 1224 /* found it */ 1225 if (netp != NULL) { 1226 *netp = net; 1227 } 1228 if (locked_tcb == NULL) { 1229 SCTP_INP_DECR_REF(inp); 1230 } else if (locked_tcb != stcb) { 1231 SCTP_TCB_LOCK(locked_tcb); 1232 } 1233 if (locked_tcb) { 1234 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1235 } 1236 SCTP_INP_WUNLOCK(inp); 1237 SCTP_INP_INFO_RUNLOCK(); 1238 return (stcb); 1239 } 1240 break; 1241 } 1242 #ifdef INET6 1243 case AF_INET6: 1244 { 1245 struct sockaddr_in6 *sin6, 1246 *rsin6; 1247 1248 sin6 = (struct sockaddr_in6 *) 1249 &net->ro._l_addr; 1250 rsin6 = (struct sockaddr_in6 *)remote; 1251 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1252 rsin6)) { 1253 /* found it */ 1254 if (netp != NULL) { 1255 *netp = net; 1256 } 1257 if (locked_tcb == NULL) { 1258 SCTP_INP_DECR_REF(inp); 1259 } else if (locked_tcb != stcb) { 1260 SCTP_TCB_LOCK(locked_tcb); 1261 } 1262 if (locked_tcb) { 1263 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1264 } 1265 SCTP_INP_WUNLOCK(inp); 1266 SCTP_INP_INFO_RUNLOCK(); 1267 return (stcb); 1268 } 1269 break; 1270 } 1271 #endif 1272 default: 1273 /* TSNH */ 1274 break; 1275 } 1276 } 1277 SCTP_TCB_UNLOCK(stcb); 1278 } 1279 } 1280 null_return: 1281 /* clean up for returning null */ 1282 if (locked_tcb) { 1283 SCTP_TCB_LOCK(locked_tcb); 1284 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1285 } 1286 SCTP_INP_WUNLOCK(inp); 1287 SCTP_INP_INFO_RUNLOCK(); 1288 /* not found */ 1289 return (NULL); 1290 } 1291 1292 /* 1293 * Find an association for a specific endpoint using the association id given 1294 * out in the COMM_UP notification 1295 */ 1296 1297 struct sctp_tcb * 1298 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1299 { 1300 /* 1301 * Use my the assoc_id to find a endpoint 1302 */ 1303 struct sctpasochead *head; 1304 struct sctp_tcb *stcb; 1305 uint32_t id; 1306 1307 if (asoc_id == 0 || inp == NULL) { 1308 return (NULL); 1309 } 1310 SCTP_INP_INFO_RLOCK(); 1311 id = (uint32_t) asoc_id; 1312 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(id, 1313 SCTP_BASE_INFO(hashasocmark))]; 1314 if (head == NULL) { 1315 /* invalid id TSNH */ 1316 SCTP_INP_INFO_RUNLOCK(); 1317 return (NULL); 1318 } 1319 LIST_FOREACH(stcb, head, sctp_asocs) { 1320 SCTP_INP_RLOCK(stcb->sctp_ep); 1321 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1322 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1323 SCTP_INP_INFO_RUNLOCK(); 1324 return (NULL); 1325 } 1326 if (stcb->asoc.assoc_id == id) { 1327 /* candidate */ 1328 if (inp != stcb->sctp_ep) { 1329 /* 1330 * some other guy has the same id active (id 1331 * collision ??). 1332 */ 1333 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1334 continue; 1335 } 1336 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1337 continue; 1338 } 1339 if (want_lock) { 1340 SCTP_TCB_LOCK(stcb); 1341 } 1342 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1343 SCTP_INP_INFO_RUNLOCK(); 1344 return (stcb); 1345 } 1346 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1347 } 1348 /* Ok if we missed here, lets try the restart hash */ 1349 head = &SCTP_BASE_INFO(sctp_restarthash)[SCTP_PCBHASH_ASOC(id, SCTP_BASE_INFO(hashrestartmark))]; 1350 if (head == NULL) { 1351 /* invalid id TSNH */ 1352 SCTP_INP_INFO_RUNLOCK(); 1353 return (NULL); 1354 } 1355 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { 1356 SCTP_INP_RLOCK(stcb->sctp_ep); 1357 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1358 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1359 continue; 1360 } 1361 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1362 continue; 1363 } 1364 if (want_lock) { 1365 SCTP_TCB_LOCK(stcb); 1366 } 1367 if (stcb->asoc.assoc_id == id) { 1368 /* candidate */ 1369 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1370 if (inp != stcb->sctp_ep) { 1371 /* 1372 * some other guy has the same id active (id 1373 * collision ??). 1374 */ 1375 if (want_lock) { 1376 SCTP_TCB_UNLOCK(stcb); 1377 } 1378 continue; 1379 } 1380 SCTP_INP_INFO_RUNLOCK(); 1381 return (stcb); 1382 } else { 1383 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1384 } 1385 if (want_lock) { 1386 SCTP_TCB_UNLOCK(stcb); 1387 } 1388 } 1389 SCTP_INP_INFO_RUNLOCK(); 1390 return (NULL); 1391 } 1392 1393 1394 static struct sctp_inpcb * 1395 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1396 uint16_t lport, uint32_t vrf_id) 1397 { 1398 struct sctp_inpcb *inp; 1399 struct sockaddr_in *sin; 1400 1401 #ifdef INET6 1402 struct sockaddr_in6 *sin6; 1403 1404 #endif 1405 struct sctp_laddr *laddr; 1406 1407 #ifdef INET6 1408 struct sockaddr_in6 *intf_addr6; 1409 1410 #endif 1411 1412 int fnd; 1413 1414 /* 1415 * Endpoing probe expects that the INP_INFO is locked. 1416 */ 1417 sin = NULL; 1418 #ifdef INET6 1419 sin6 = NULL; 1420 #endif 1421 switch (nam->sa_family) { 1422 case AF_INET: 1423 sin = (struct sockaddr_in *)nam; 1424 break; 1425 #ifdef INET6 1426 case AF_INET6: 1427 sin6 = (struct sockaddr_in6 *)nam; 1428 break; 1429 #endif 1430 default: 1431 /* unsupported family */ 1432 return (NULL); 1433 } 1434 1435 if (head == NULL) 1436 return (NULL); 1437 LIST_FOREACH(inp, head, sctp_hash) { 1438 SCTP_INP_RLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 SCTP_INP_RUNLOCK(inp); 1441 continue; 1442 } 1443 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1444 (inp->sctp_lport == lport)) { 1445 /* got it */ 1446 if ((nam->sa_family == AF_INET) && 1447 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1448 SCTP_IPV6_V6ONLY(inp)) { 1449 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1450 SCTP_INP_RUNLOCK(inp); 1451 continue; 1452 } 1453 /* A V6 address and the endpoint is NOT bound V6 */ 1454 if (nam->sa_family == AF_INET6 && 1455 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1456 SCTP_INP_RUNLOCK(inp); 1457 continue; 1458 } 1459 /* does a VRF id match? */ 1460 fnd = 0; 1461 if (inp->def_vrf_id == vrf_id) 1462 fnd = 1; 1463 1464 SCTP_INP_RUNLOCK(inp); 1465 if (!fnd) 1466 continue; 1467 return (inp); 1468 } 1469 SCTP_INP_RUNLOCK(inp); 1470 } 1471 if ((nam->sa_family == AF_INET) && 1472 (sin->sin_addr.s_addr == INADDR_ANY)) { 1473 /* Can't hunt for one that has no address specified */ 1474 return (NULL); 1475 } 1476 #ifdef INET6 1477 if ((nam->sa_family == AF_INET6) && 1478 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 1479 /* Can't hunt for one that has no address specified */ 1480 return (NULL); 1481 } 1482 #endif 1483 /* 1484 * ok, not bound to all so see if we can find a EP bound to this 1485 * address. 1486 */ 1487 LIST_FOREACH(inp, head, sctp_hash) { 1488 SCTP_INP_RLOCK(inp); 1489 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1490 SCTP_INP_RUNLOCK(inp); 1491 continue; 1492 } 1493 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1494 SCTP_INP_RUNLOCK(inp); 1495 continue; 1496 } 1497 /* 1498 * Ok this could be a likely candidate, look at all of its 1499 * addresses 1500 */ 1501 if (inp->sctp_lport != lport) { 1502 SCTP_INP_RUNLOCK(inp); 1503 continue; 1504 } 1505 /* does a VRF id match? */ 1506 fnd = 0; 1507 if (inp->def_vrf_id == vrf_id) 1508 fnd = 1; 1509 1510 if (!fnd) { 1511 SCTP_INP_RUNLOCK(inp); 1512 continue; 1513 } 1514 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1515 if (laddr->ifa == NULL) { 1516 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1517 __FUNCTION__); 1518 continue; 1519 } 1520 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1521 laddr->ifa); 1522 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1523 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1524 continue; 1525 } 1526 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1527 /* possible, see if it matches */ 1528 struct sockaddr_in *intf_addr; 1529 1530 intf_addr = &laddr->ifa->address.sin; 1531 switch (nam->sa_family) { 1532 case AF_INET: 1533 if (sin->sin_addr.s_addr == 1534 intf_addr->sin_addr.s_addr) { 1535 SCTP_INP_RUNLOCK(inp); 1536 return (inp); 1537 } 1538 break; 1539 #ifdef INET6 1540 case AF_INET6: 1541 intf_addr6 = &laddr->ifa->address.sin6; 1542 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1543 intf_addr6)) { 1544 SCTP_INP_RUNLOCK(inp); 1545 return (inp); 1546 } 1547 break; 1548 #endif 1549 } 1550 } 1551 } 1552 SCTP_INP_RUNLOCK(inp); 1553 } 1554 return (NULL); 1555 } 1556 1557 1558 static struct sctp_inpcb * 1559 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1560 { 1561 struct sctppcbhead *head; 1562 struct sctp_inpcb *t_inp; 1563 int fnd; 1564 1565 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1566 SCTP_BASE_INFO(hashmark))]; 1567 LIST_FOREACH(t_inp, head, sctp_hash) { 1568 if (t_inp->sctp_lport != lport) { 1569 continue; 1570 } 1571 /* is it in the VRF in question */ 1572 fnd = 0; 1573 if (t_inp->def_vrf_id == vrf_id) 1574 fnd = 1; 1575 if (!fnd) 1576 continue; 1577 1578 /* This one is in use. */ 1579 /* check the v6/v4 binding issue */ 1580 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1581 SCTP_IPV6_V6ONLY(t_inp)) { 1582 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1583 /* collision in V6 space */ 1584 return (t_inp); 1585 } else { 1586 /* inp is BOUND_V4 no conflict */ 1587 continue; 1588 } 1589 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1590 /* t_inp is bound v4 and v6, conflict always */ 1591 return (t_inp); 1592 } else { 1593 /* t_inp is bound only V4 */ 1594 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1595 SCTP_IPV6_V6ONLY(inp)) { 1596 /* no conflict */ 1597 continue; 1598 } 1599 /* else fall through to conflict */ 1600 } 1601 return (t_inp); 1602 } 1603 return (NULL); 1604 } 1605 1606 1607 int 1608 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1609 { 1610 /* For 1-2-1 with port reuse */ 1611 struct sctppcbhead *head; 1612 struct sctp_inpcb *tinp; 1613 1614 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1615 /* only works with port reuse on */ 1616 return (-1); 1617 } 1618 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1619 return (0); 1620 } 1621 SCTP_INP_RUNLOCK(inp); 1622 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1623 SCTP_BASE_INFO(hashmark))]; 1624 /* Kick out all non-listeners to the TCP hash */ 1625 LIST_FOREACH(tinp, head, sctp_hash) { 1626 if (tinp->sctp_lport != inp->sctp_lport) { 1627 continue; 1628 } 1629 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1630 continue; 1631 } 1632 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1633 continue; 1634 } 1635 if (tinp->sctp_socket->so_qlimit) { 1636 continue; 1637 } 1638 SCTP_INP_WLOCK(tinp); 1639 LIST_REMOVE(tinp, sctp_hash); 1640 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1641 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1642 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1643 SCTP_INP_WUNLOCK(tinp); 1644 } 1645 SCTP_INP_WLOCK(inp); 1646 /* Pull from where he was */ 1647 LIST_REMOVE(inp, sctp_hash); 1648 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1649 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1650 LIST_INSERT_HEAD(head, inp, sctp_hash); 1651 SCTP_INP_WUNLOCK(inp); 1652 SCTP_INP_RLOCK(inp); 1653 return (0); 1654 } 1655 1656 1657 struct sctp_inpcb * 1658 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1659 uint32_t vrf_id) 1660 { 1661 /* 1662 * First we check the hash table to see if someone has this port 1663 * bound with just the port. 1664 */ 1665 struct sctp_inpcb *inp; 1666 struct sctppcbhead *head; 1667 struct sockaddr_in *sin; 1668 struct sockaddr_in6 *sin6; 1669 int lport; 1670 1671 if (nam->sa_family == AF_INET) { 1672 sin = (struct sockaddr_in *)nam; 1673 lport = ((struct sockaddr_in *)nam)->sin_port; 1674 } else if (nam->sa_family == AF_INET6) { 1675 sin6 = (struct sockaddr_in6 *)nam; 1676 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1677 } else { 1678 /* unsupported family */ 1679 return (NULL); 1680 } 1681 /* 1682 * I could cheat here and just cast to one of the types but we will 1683 * do it right. It also provides the check against an Unsupported 1684 * type too. 1685 */ 1686 /* Find the head of the ALLADDR chain */ 1687 if (have_lock == 0) { 1688 SCTP_INP_INFO_RLOCK(); 1689 } 1690 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1691 SCTP_BASE_INFO(hashmark))]; 1692 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1693 1694 /* 1695 * If the TCP model exists it could be that the main listening 1696 * endpoint is gone but there exists a connected socket for this guy 1697 * yet. If so we can return the first one that we find. This may NOT 1698 * be the correct one but the sctp_findassociation_ep_addr has 1699 * further code to look at all TCP models. 1700 */ 1701 if (inp == NULL && find_tcp_pool) { 1702 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 1703 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1704 } 1705 if (inp) { 1706 SCTP_INP_INCR_REF(inp); 1707 } 1708 if (have_lock == 0) { 1709 SCTP_INP_INFO_RUNLOCK(); 1710 } 1711 return (inp); 1712 } 1713 1714 /* 1715 * Find an association for an endpoint with the pointer to whom you want to 1716 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1717 * need to change the *to to some other struct like a mbuf... 1718 */ 1719 struct sctp_tcb * 1720 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1721 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1722 uint32_t vrf_id) 1723 { 1724 struct sctp_inpcb *inp = NULL; 1725 struct sctp_tcb *retval; 1726 1727 SCTP_INP_INFO_RLOCK(); 1728 if (find_tcp_pool) { 1729 if (inp_p != NULL) { 1730 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1731 vrf_id); 1732 } else { 1733 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1734 vrf_id); 1735 } 1736 if (retval != NULL) { 1737 SCTP_INP_INFO_RUNLOCK(); 1738 return (retval); 1739 } 1740 } 1741 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1742 if (inp_p != NULL) { 1743 *inp_p = inp; 1744 } 1745 SCTP_INP_INFO_RUNLOCK(); 1746 1747 if (inp == NULL) { 1748 return (NULL); 1749 } 1750 /* 1751 * ok, we have an endpoint, now lets find the assoc for it (if any) 1752 * we now place the source address or from in the to of the find 1753 * endpoint call. Since in reality this chain is used from the 1754 * inbound packet side. 1755 */ 1756 if (inp_p != NULL) { 1757 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1758 NULL); 1759 } else { 1760 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1761 NULL); 1762 } 1763 return retval; 1764 } 1765 1766 1767 /* 1768 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1769 * find all addresses that the sender has specified in any address list. Each 1770 * address will be used to lookup the TCB and see if one exits. 1771 */ 1772 static struct sctp_tcb * 1773 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1774 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1775 struct sockaddr *dest) 1776 { 1777 struct sockaddr_in sin4; 1778 struct sockaddr_in6 sin6; 1779 struct sctp_paramhdr *phdr, parm_buf; 1780 struct sctp_tcb *retval; 1781 uint32_t ptype, plen; 1782 1783 memset(&sin4, 0, sizeof(sin4)); 1784 memset(&sin6, 0, sizeof(sin6)); 1785 sin4.sin_len = sizeof(sin4); 1786 sin4.sin_family = AF_INET; 1787 sin4.sin_port = sh->src_port; 1788 sin6.sin6_len = sizeof(sin6); 1789 sin6.sin6_family = AF_INET6; 1790 sin6.sin6_port = sh->src_port; 1791 1792 retval = NULL; 1793 offset += sizeof(struct sctp_init_chunk); 1794 1795 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1796 while (phdr != NULL) { 1797 /* now we must see if we want the parameter */ 1798 ptype = ntohs(phdr->param_type); 1799 plen = ntohs(phdr->param_length); 1800 if (plen == 0) { 1801 break; 1802 } 1803 if (ptype == SCTP_IPV4_ADDRESS && 1804 plen == sizeof(struct sctp_ipv4addr_param)) { 1805 /* Get the rest of the address */ 1806 struct sctp_ipv4addr_param ip4_parm, *p4; 1807 1808 phdr = sctp_get_next_param(m, offset, 1809 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1810 if (phdr == NULL) { 1811 return (NULL); 1812 } 1813 p4 = (struct sctp_ipv4addr_param *)phdr; 1814 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 1815 /* look it up */ 1816 retval = sctp_findassociation_ep_addr(inp_p, 1817 (struct sockaddr *)&sin4, netp, dest, NULL); 1818 if (retval != NULL) { 1819 return (retval); 1820 } 1821 } else if (ptype == SCTP_IPV6_ADDRESS && 1822 plen == sizeof(struct sctp_ipv6addr_param)) { 1823 /* Get the rest of the address */ 1824 struct sctp_ipv6addr_param ip6_parm, *p6; 1825 1826 phdr = sctp_get_next_param(m, offset, 1827 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 1828 if (phdr == NULL) { 1829 return (NULL); 1830 } 1831 p6 = (struct sctp_ipv6addr_param *)phdr; 1832 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 1833 /* look it up */ 1834 retval = sctp_findassociation_ep_addr(inp_p, 1835 (struct sockaddr *)&sin6, netp, dest, NULL); 1836 if (retval != NULL) { 1837 return (retval); 1838 } 1839 } 1840 offset += SCTP_SIZE32(plen); 1841 phdr = sctp_get_next_param(m, offset, &parm_buf, 1842 sizeof(parm_buf)); 1843 } 1844 return (NULL); 1845 } 1846 1847 1848 static struct sctp_tcb * 1849 sctp_findassoc_by_vtag(struct sockaddr *from, uint32_t vtag, 1850 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 1851 uint16_t lport, int skip_src_check) 1852 { 1853 /* 1854 * Use my vtag to hash. If we find it we then verify the source addr 1855 * is in the assoc. If all goes well we save a bit on rec of a 1856 * packet. 1857 */ 1858 struct sctpasochead *head; 1859 struct sctp_nets *net; 1860 struct sctp_tcb *stcb; 1861 1862 *netp = NULL; 1863 *inp_p = NULL; 1864 SCTP_INP_INFO_RLOCK(); 1865 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 1866 SCTP_BASE_INFO(hashasocmark))]; 1867 if (head == NULL) { 1868 /* invalid vtag */ 1869 SCTP_INP_INFO_RUNLOCK(); 1870 return (NULL); 1871 } 1872 LIST_FOREACH(stcb, head, sctp_asocs) { 1873 SCTP_INP_RLOCK(stcb->sctp_ep); 1874 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1875 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1876 continue; 1877 } 1878 SCTP_TCB_LOCK(stcb); 1879 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1880 if (stcb->asoc.my_vtag == vtag) { 1881 /* candidate */ 1882 if (stcb->rport != rport) { 1883 /* 1884 * we could remove this if vtags are unique 1885 * across the system. 1886 */ 1887 SCTP_TCB_UNLOCK(stcb); 1888 continue; 1889 } 1890 if (stcb->sctp_ep->sctp_lport != lport) { 1891 /* 1892 * we could remove this if vtags are unique 1893 * across the system. 1894 */ 1895 SCTP_TCB_UNLOCK(stcb); 1896 continue; 1897 } 1898 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1899 SCTP_TCB_UNLOCK(stcb); 1900 continue; 1901 } 1902 if (skip_src_check) { 1903 *netp = NULL; /* unknown */ 1904 if (inp_p) 1905 *inp_p = stcb->sctp_ep; 1906 SCTP_INP_INFO_RUNLOCK(); 1907 return (stcb); 1908 } 1909 net = sctp_findnet(stcb, from); 1910 if (net) { 1911 /* yep its him. */ 1912 *netp = net; 1913 SCTP_STAT_INCR(sctps_vtagexpress); 1914 *inp_p = stcb->sctp_ep; 1915 SCTP_INP_INFO_RUNLOCK(); 1916 return (stcb); 1917 } else { 1918 /* 1919 * not him, this should only happen in rare 1920 * cases so I peg it. 1921 */ 1922 SCTP_STAT_INCR(sctps_vtagbogus); 1923 } 1924 } 1925 SCTP_TCB_UNLOCK(stcb); 1926 } 1927 SCTP_INP_INFO_RUNLOCK(); 1928 return (NULL); 1929 } 1930 1931 /* 1932 * Find an association with the pointer to the inbound IP packet. This can be 1933 * a IPv4 or IPv6 packet. 1934 */ 1935 struct sctp_tcb * 1936 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 1937 struct sctphdr *sh, struct sctp_chunkhdr *ch, 1938 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 1939 { 1940 int find_tcp_pool; 1941 struct ip *iph; 1942 struct sctp_tcb *retval; 1943 struct sockaddr_storage to_store, from_store; 1944 struct sockaddr *to = (struct sockaddr *)&to_store; 1945 struct sockaddr *from = (struct sockaddr *)&from_store; 1946 struct sctp_inpcb *inp; 1947 1948 iph = mtod(m, struct ip *); 1949 switch (iph->ip_v) { 1950 case IPVERSION: 1951 { 1952 /* its IPv4 */ 1953 struct sockaddr_in *from4; 1954 1955 from4 = (struct sockaddr_in *)&from_store; 1956 bzero(from4, sizeof(*from4)); 1957 from4->sin_family = AF_INET; 1958 from4->sin_len = sizeof(struct sockaddr_in); 1959 from4->sin_addr.s_addr = iph->ip_src.s_addr; 1960 from4->sin_port = sh->src_port; 1961 break; 1962 } 1963 #ifdef INET6 1964 case IPV6_VERSION >> 4: 1965 { 1966 /* its IPv6 */ 1967 struct ip6_hdr *ip6; 1968 struct sockaddr_in6 *from6; 1969 1970 ip6 = mtod(m, struct ip6_hdr *); 1971 from6 = (struct sockaddr_in6 *)&from_store; 1972 bzero(from6, sizeof(*from6)); 1973 from6->sin6_family = AF_INET6; 1974 from6->sin6_len = sizeof(struct sockaddr_in6); 1975 from6->sin6_addr = ip6->ip6_src; 1976 from6->sin6_port = sh->src_port; 1977 /* Get the scopes in properly to the sin6 addr's */ 1978 /* we probably don't need these operations */ 1979 (void)sa6_recoverscope(from6); 1980 sa6_embedscope(from6, MODULE_GLOBAL(MOD_INET6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone))); 1981 break; 1982 } 1983 #endif 1984 default: 1985 /* Currently not supported. */ 1986 return (NULL); 1987 } 1988 if (sh->v_tag) { 1989 /* we only go down this path if vtag is non-zero */ 1990 retval = sctp_findassoc_by_vtag(from, ntohl(sh->v_tag), 1991 inp_p, netp, sh->src_port, sh->dest_port, 0); 1992 if (retval) { 1993 return (retval); 1994 } 1995 } 1996 switch (iph->ip_v) { 1997 case IPVERSION: 1998 { 1999 /* its IPv4 */ 2000 struct sockaddr_in *to4; 2001 2002 to4 = (struct sockaddr_in *)&to_store; 2003 bzero(to4, sizeof(*to4)); 2004 to4->sin_family = AF_INET; 2005 to4->sin_len = sizeof(struct sockaddr_in); 2006 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 2007 to4->sin_port = sh->dest_port; 2008 break; 2009 } 2010 #ifdef INET6 2011 case IPV6_VERSION >> 4: 2012 { 2013 /* its IPv6 */ 2014 struct ip6_hdr *ip6; 2015 struct sockaddr_in6 *to6; 2016 2017 ip6 = mtod(m, struct ip6_hdr *); 2018 to6 = (struct sockaddr_in6 *)&to_store; 2019 bzero(to6, sizeof(*to6)); 2020 to6->sin6_family = AF_INET6; 2021 to6->sin6_len = sizeof(struct sockaddr_in6); 2022 to6->sin6_addr = ip6->ip6_dst; 2023 to6->sin6_port = sh->dest_port; 2024 /* Get the scopes in properly to the sin6 addr's */ 2025 /* we probably don't need these operations */ 2026 (void)sa6_recoverscope(to6); 2027 sa6_embedscope(to6, MODULE_GLOBAL(MOD_INET6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone))); 2028 break; 2029 } 2030 #endif 2031 default: 2032 /* TSNH */ 2033 break; 2034 } 2035 find_tcp_pool = 0; 2036 if ((ch->chunk_type != SCTP_INITIATION) && 2037 (ch->chunk_type != SCTP_INITIATION_ACK) && 2038 (ch->chunk_type != SCTP_COOKIE_ACK) && 2039 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2040 /* Other chunk types go to the tcp pool. */ 2041 find_tcp_pool = 1; 2042 } 2043 if (inp_p) { 2044 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 2045 find_tcp_pool, vrf_id); 2046 inp = *inp_p; 2047 } else { 2048 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 2049 find_tcp_pool, vrf_id); 2050 } 2051 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2052 if (retval == NULL && inp) { 2053 /* Found a EP but not this address */ 2054 if ((ch->chunk_type == SCTP_INITIATION) || 2055 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2056 /*- 2057 * special hook, we do NOT return linp or an 2058 * association that is linked to an existing 2059 * association that is under the TCP pool (i.e. no 2060 * listener exists). The endpoint finding routine 2061 * will always find a listner before examining the 2062 * TCP pool. 2063 */ 2064 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2065 if (inp_p) { 2066 *inp_p = NULL; 2067 } 2068 return (NULL); 2069 } 2070 retval = sctp_findassociation_special_addr(m, iphlen, 2071 offset, sh, &inp, netp, to); 2072 if (inp_p != NULL) { 2073 *inp_p = inp; 2074 } 2075 } 2076 } 2077 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2078 return (retval); 2079 } 2080 2081 /* 2082 * lookup an association by an ASCONF lookup address. 2083 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2084 */ 2085 struct sctp_tcb * 2086 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 2087 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp) 2088 { 2089 struct sctp_tcb *stcb; 2090 struct sockaddr_in *sin; 2091 2092 #ifdef INET6 2093 struct sockaddr_in6 *sin6; 2094 2095 #endif 2096 struct sockaddr_storage local_store, remote_store; 2097 struct ip *iph; 2098 2099 #ifdef INET6 2100 struct ip6_hdr *ip6; 2101 2102 #endif 2103 struct sctp_paramhdr parm_buf, *phdr; 2104 int ptype; 2105 int zero_address = 0; 2106 2107 2108 memset(&local_store, 0, sizeof(local_store)); 2109 memset(&remote_store, 0, sizeof(remote_store)); 2110 2111 /* First get the destination address setup too. */ 2112 iph = mtod(m, struct ip *); 2113 switch (iph->ip_v) { 2114 case IPVERSION: 2115 /* its IPv4 */ 2116 sin = (struct sockaddr_in *)&local_store; 2117 sin->sin_family = AF_INET; 2118 sin->sin_len = sizeof(*sin); 2119 sin->sin_port = sh->dest_port; 2120 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 2121 break; 2122 #ifdef INET6 2123 case IPV6_VERSION >> 4: 2124 /* its IPv6 */ 2125 ip6 = mtod(m, struct ip6_hdr *); 2126 sin6 = (struct sockaddr_in6 *)&local_store; 2127 sin6->sin6_family = AF_INET6; 2128 sin6->sin6_len = sizeof(*sin6); 2129 sin6->sin6_port = sh->dest_port; 2130 sin6->sin6_addr = ip6->ip6_dst; 2131 break; 2132 #endif 2133 default: 2134 return NULL; 2135 } 2136 2137 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2138 &parm_buf, sizeof(struct sctp_paramhdr)); 2139 if (phdr == NULL) { 2140 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2141 __FUNCTION__); 2142 return NULL; 2143 } 2144 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2145 /* get the correlation address */ 2146 switch (ptype) { 2147 #ifdef INET6 2148 case SCTP_IPV6_ADDRESS: 2149 { 2150 /* ipv6 address param */ 2151 struct sctp_ipv6addr_param *p6, p6_buf; 2152 2153 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2154 return NULL; 2155 } 2156 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2157 offset + sizeof(struct sctp_asconf_chunk), 2158 &p6_buf.ph, sizeof(*p6)); 2159 if (p6 == NULL) { 2160 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2161 __FUNCTION__); 2162 return (NULL); 2163 } 2164 sin6 = (struct sockaddr_in6 *)&remote_store; 2165 sin6->sin6_family = AF_INET6; 2166 sin6->sin6_len = sizeof(*sin6); 2167 sin6->sin6_port = sh->src_port; 2168 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2169 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2170 zero_address = 1; 2171 break; 2172 } 2173 #endif 2174 case SCTP_IPV4_ADDRESS: 2175 { 2176 /* ipv4 address param */ 2177 struct sctp_ipv4addr_param *p4, p4_buf; 2178 2179 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2180 return NULL; 2181 } 2182 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2183 offset + sizeof(struct sctp_asconf_chunk), 2184 &p4_buf.ph, sizeof(*p4)); 2185 if (p4 == NULL) { 2186 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2187 __FUNCTION__); 2188 return (NULL); 2189 } 2190 sin = (struct sockaddr_in *)&remote_store; 2191 sin->sin_family = AF_INET; 2192 sin->sin_len = sizeof(*sin); 2193 sin->sin_port = sh->src_port; 2194 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2195 if (sin->sin_addr.s_addr == INADDR_ANY) 2196 zero_address = 1; 2197 break; 2198 } 2199 default: 2200 /* invalid address param type */ 2201 return NULL; 2202 } 2203 2204 if (zero_address) { 2205 stcb = sctp_findassoc_by_vtag(NULL, ntohl(sh->v_tag), inp_p, 2206 netp, sh->src_port, sh->dest_port, 1); 2207 /* 2208 * printf("findassociation_ep_asconf: zero lookup address 2209 * finds stcb 0x%x\n", (uint32_t)stcb); 2210 */ 2211 } else { 2212 stcb = sctp_findassociation_ep_addr(inp_p, 2213 (struct sockaddr *)&remote_store, netp, 2214 (struct sockaddr *)&local_store, NULL); 2215 } 2216 return (stcb); 2217 } 2218 2219 2220 /* 2221 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2222 * addresses. This way if we don't get a bind we by default pick a ephemeral 2223 * port with all addresses bound. 2224 */ 2225 int 2226 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2227 { 2228 /* 2229 * we get called when a new endpoint starts up. We need to allocate 2230 * the sctp_inpcb structure from the zone and init it. Mark it as 2231 * unbound and find a port that we can use as an ephemeral with 2232 * INADDR_ANY. If the user binds later no problem we can then add in 2233 * the specific addresses. And setup the default parameters for the 2234 * EP. 2235 */ 2236 int i, error; 2237 struct sctp_inpcb *inp; 2238 struct sctp_pcb *m; 2239 struct timeval time; 2240 sctp_sharedkey_t *null_key; 2241 2242 error = 0; 2243 2244 SCTP_INP_INFO_WLOCK(); 2245 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2246 if (inp == NULL) { 2247 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2248 SCTP_INP_INFO_WUNLOCK(); 2249 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2250 return (ENOBUFS); 2251 } 2252 /* zap it */ 2253 bzero(inp, sizeof(*inp)); 2254 2255 /* bump generations */ 2256 /* setup socket pointers */ 2257 inp->sctp_socket = so; 2258 inp->ip_inp.inp.inp_socket = so; 2259 2260 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2261 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2262 2263 #ifdef IPSEC 2264 { 2265 struct inpcbpolicy *pcb_sp = NULL; 2266 2267 error = ipsec_init_policy(so, &pcb_sp); 2268 /* Arrange to share the policy */ 2269 inp->ip_inp.inp.inp_sp = pcb_sp; 2270 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2271 } 2272 if (error != 0) { 2273 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2274 SCTP_INP_INFO_WUNLOCK(); 2275 return error; 2276 } 2277 #endif /* IPSEC */ 2278 SCTP_INCR_EP_COUNT(); 2279 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(MOD_INET, ip_defttl); 2280 SCTP_INP_INFO_WUNLOCK(); 2281 2282 so->so_pcb = (caddr_t)inp; 2283 2284 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 2285 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 2286 /* UDP style socket */ 2287 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2288 SCTP_PCB_FLAGS_UNBOUND); 2289 /* Be sure it is NON-BLOCKING IO for UDP */ 2290 /* SCTP_SET_SO_NBIO(so); */ 2291 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2292 /* TCP style socket */ 2293 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2294 SCTP_PCB_FLAGS_UNBOUND); 2295 /* Be sure we have blocking IO by default */ 2296 SCTP_CLEAR_SO_NBIO(so); 2297 } else { 2298 /* 2299 * unsupported socket type (RAW, etc)- in case we missed it 2300 * in protosw 2301 */ 2302 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2303 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2304 return (EOPNOTSUPP); 2305 } 2306 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2307 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2308 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2309 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2310 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2311 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2312 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2313 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2314 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2315 } 2316 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2317 &inp->sctp_hashmark); 2318 if (inp->sctp_tcbhash == NULL) { 2319 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2320 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2321 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2322 return (ENOBUFS); 2323 } 2324 inp->def_vrf_id = vrf_id; 2325 2326 SCTP_INP_INFO_WLOCK(); 2327 SCTP_INP_LOCK_INIT(inp); 2328 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2329 SCTP_INP_READ_INIT(inp); 2330 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2331 /* lock the new ep */ 2332 SCTP_INP_WLOCK(inp); 2333 2334 /* add it to the info area */ 2335 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2336 SCTP_INP_INFO_WUNLOCK(); 2337 2338 TAILQ_INIT(&inp->read_queue); 2339 LIST_INIT(&inp->sctp_addr_list); 2340 2341 LIST_INIT(&inp->sctp_asoc_list); 2342 2343 #ifdef SCTP_TRACK_FREED_ASOCS 2344 /* TEMP CODE */ 2345 LIST_INIT(&inp->sctp_asoc_free_list); 2346 #endif 2347 /* Init the timer structure for signature change */ 2348 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2349 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2350 2351 /* now init the actual endpoint default data */ 2352 m = &inp->sctp_ep; 2353 2354 /* setup the base timeout information */ 2355 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2356 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2357 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2358 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2359 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2360 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2361 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2362 /* all max/min max are in ms */ 2363 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2364 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2365 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2366 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2367 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2368 2369 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2370 2371 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2372 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2373 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2374 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2375 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2376 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2377 if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) && 2378 (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) { 2379 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2380 } else { 2381 /* sysctl done with invalid value, set to 2581 */ 2382 m->sctp_default_cc_module = SCTP_CC_RFC2581; 2383 } 2384 /* number of streams to pre-open on a association */ 2385 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2386 2387 /* Add adaptation cookie */ 2388 m->adaptation_layer_indicator = 0x504C5253; 2389 2390 /* seed random number generator */ 2391 m->random_counter = 1; 2392 m->store_at = SCTP_SIGNATURE_SIZE; 2393 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2394 sctp_fill_random_store(m); 2395 2396 /* Minimum cookie size */ 2397 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2398 sizeof(struct sctp_state_cookie); 2399 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2400 2401 /* Setup the initial secret */ 2402 (void)SCTP_GETTIME_TIMEVAL(&time); 2403 m->time_of_secret_change = time.tv_sec; 2404 2405 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2406 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2407 } 2408 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2409 2410 /* How long is a cookie good for ? */ 2411 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2412 /* 2413 * Initialize authentication parameters 2414 */ 2415 m->local_hmacs = sctp_default_supported_hmaclist(); 2416 m->local_auth_chunks = sctp_alloc_chunklist(); 2417 sctp_auth_set_default_chunks(m->local_auth_chunks); 2418 LIST_INIT(&m->shared_keys); 2419 /* add default NULL key as key id 0 */ 2420 null_key = sctp_alloc_sharedkey(); 2421 sctp_insert_sharedkey(&m->shared_keys, null_key); 2422 SCTP_INP_WUNLOCK(inp); 2423 #ifdef SCTP_LOG_CLOSING 2424 sctp_log_closing(inp, NULL, 12); 2425 #endif 2426 return (error); 2427 } 2428 2429 2430 void 2431 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2432 struct sctp_tcb *stcb) 2433 { 2434 struct sctp_nets *net; 2435 uint16_t lport, rport; 2436 struct sctppcbhead *head; 2437 struct sctp_laddr *laddr, *oladdr; 2438 2439 atomic_add_int(&stcb->asoc.refcnt, 1); 2440 SCTP_TCB_UNLOCK(stcb); 2441 SCTP_INP_INFO_WLOCK(); 2442 SCTP_INP_WLOCK(old_inp); 2443 SCTP_INP_WLOCK(new_inp); 2444 SCTP_TCB_LOCK(stcb); 2445 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2446 2447 new_inp->sctp_ep.time_of_secret_change = 2448 old_inp->sctp_ep.time_of_secret_change; 2449 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2450 sizeof(old_inp->sctp_ep.secret_key)); 2451 new_inp->sctp_ep.current_secret_number = 2452 old_inp->sctp_ep.current_secret_number; 2453 new_inp->sctp_ep.last_secret_number = 2454 old_inp->sctp_ep.last_secret_number; 2455 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2456 2457 /* make it so new data pours into the new socket */ 2458 stcb->sctp_socket = new_inp->sctp_socket; 2459 stcb->sctp_ep = new_inp; 2460 2461 /* Copy the port across */ 2462 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2463 rport = stcb->rport; 2464 /* Pull the tcb from the old association */ 2465 LIST_REMOVE(stcb, sctp_tcbhash); 2466 LIST_REMOVE(stcb, sctp_tcblist); 2467 2468 /* Now insert the new_inp into the TCP connected hash */ 2469 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), 2470 SCTP_BASE_INFO(hashtcpmark))]; 2471 2472 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2473 /* Its safe to access */ 2474 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2475 2476 /* Now move the tcb into the endpoint list */ 2477 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2478 /* 2479 * Question, do we even need to worry about the ep-hash since we 2480 * only have one connection? Probably not :> so lets get rid of it 2481 * and not suck up any kernel memory in that. 2482 */ 2483 2484 /* Ok. Let's restart timer. */ 2485 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2486 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2487 stcb, net); 2488 } 2489 2490 SCTP_INP_INFO_WUNLOCK(); 2491 if (new_inp->sctp_tcbhash != NULL) { 2492 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2493 new_inp->sctp_tcbhash = NULL; 2494 } 2495 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2496 /* Subset bound, so copy in the laddr list from the old_inp */ 2497 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2498 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2499 if (laddr == NULL) { 2500 /* 2501 * Gak, what can we do? This assoc is really 2502 * HOSED. We probably should send an abort 2503 * here. 2504 */ 2505 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2506 continue; 2507 } 2508 SCTP_INCR_LADDR_COUNT(); 2509 bzero(laddr, sizeof(*laddr)); 2510 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2511 laddr->ifa = oladdr->ifa; 2512 atomic_add_int(&laddr->ifa->refcount, 1); 2513 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2514 sctp_nxt_addr); 2515 new_inp->laddr_count++; 2516 } 2517 } 2518 /* 2519 * Now any running timers need to be adjusted since we really don't 2520 * care if they are running or not just blast in the new_inp into 2521 * all of them. 2522 */ 2523 2524 stcb->asoc.hb_timer.ep = (void *)new_inp; 2525 stcb->asoc.dack_timer.ep = (void *)new_inp; 2526 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2527 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2528 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2529 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2530 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2531 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2532 /* now what about the nets? */ 2533 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2534 net->pmtu_timer.ep = (void *)new_inp; 2535 net->rxt_timer.ep = (void *)new_inp; 2536 net->fr_timer.ep = (void *)new_inp; 2537 } 2538 SCTP_INP_WUNLOCK(new_inp); 2539 SCTP_INP_WUNLOCK(old_inp); 2540 } 2541 2542 2543 2544 2545 /* sctp_ifap is used to bypass normal local address validation checks */ 2546 int 2547 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2548 struct sctp_ifa *sctp_ifap, struct thread *p) 2549 { 2550 /* bind a ep to a socket address */ 2551 struct sctppcbhead *head; 2552 struct sctp_inpcb *inp, *inp_tmp; 2553 struct inpcb *ip_inp; 2554 int port_reuse_active = 0; 2555 int bindall; 2556 int prison = 0; 2557 uint16_t lport; 2558 int error; 2559 uint32_t vrf_id; 2560 2561 lport = 0; 2562 error = 0; 2563 bindall = 1; 2564 inp = (struct sctp_inpcb *)so->so_pcb; 2565 ip_inp = (struct inpcb *)so->so_pcb; 2566 #ifdef SCTP_DEBUG 2567 if (addr) { 2568 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2569 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2570 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2571 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2572 } 2573 #endif 2574 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2575 /* already did a bind, subsequent binds NOT allowed ! */ 2576 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2577 return (EINVAL); 2578 } 2579 #ifdef INVARIANTS 2580 if (p == NULL) 2581 panic("null proc/thread"); 2582 #endif 2583 if (p && jailed(p->td_ucred)) { 2584 prison = 1; 2585 } 2586 if (addr != NULL) { 2587 switch (addr->sa_family) { 2588 case AF_INET: 2589 { 2590 struct sockaddr_in *sin; 2591 2592 /* IPV6_V6ONLY socket? */ 2593 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2594 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2595 return (EINVAL); 2596 } 2597 if (addr->sa_len != sizeof(*sin)) { 2598 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2599 return (EINVAL); 2600 } 2601 sin = (struct sockaddr_in *)addr; 2602 lport = sin->sin_port; 2603 if (prison) { 2604 /* 2605 * For INADDR_ANY and LOOPBACK the 2606 * prison_ip() call will transmute 2607 * the ip address to the proper 2608 * value (i.e. the IP address owned 2609 * by the jail). 2610 */ 2611 if (prison_ip(p->td_ucred, 0, &sin->sin_addr.s_addr)) { 2612 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2613 return (EINVAL); 2614 } 2615 } 2616 if (sin->sin_addr.s_addr != INADDR_ANY) { 2617 bindall = 0; 2618 } 2619 break; 2620 } 2621 #ifdef INET6 2622 case AF_INET6: 2623 { 2624 /* 2625 * Only for pure IPv6 Address. (No IPv4 2626 * Mapped!) 2627 */ 2628 struct sockaddr_in6 *sin6; 2629 2630 sin6 = (struct sockaddr_in6 *)addr; 2631 2632 if (addr->sa_len != sizeof(*sin6)) { 2633 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2634 return (EINVAL); 2635 } 2636 lport = sin6->sin6_port; 2637 /* 2638 * Jail checks for IPv6 should go HERE! i.e. 2639 * add the prison_ip() equivilant in this 2640 * postion to transmute the addresses to the 2641 * proper one jailed. 2642 */ 2643 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2644 bindall = 0; 2645 /* KAME hack: embed scopeid */ 2646 if (sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)) != 0) { 2647 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2648 return (EINVAL); 2649 } 2650 } 2651 /* this must be cleared for ifa_ifwithaddr() */ 2652 sin6->sin6_scope_id = 0; 2653 break; 2654 } 2655 #endif 2656 default: 2657 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2658 return (EAFNOSUPPORT); 2659 } 2660 } 2661 SCTP_INP_INFO_WLOCK(); 2662 SCTP_INP_WLOCK(inp); 2663 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2664 vrf_id = inp->def_vrf_id; 2665 2666 /* increase our count due to the unlock we do */ 2667 SCTP_INP_INCR_REF(inp); 2668 if (lport) { 2669 /* 2670 * Did the caller specify a port? if so we must see if a ep 2671 * already has this one bound. 2672 */ 2673 /* got to be root to get at low ports */ 2674 if (ntohs(lport) < IPPORT_RESERVED) { 2675 if (p && (error = 2676 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2677 )) { 2678 SCTP_INP_DECR_REF(inp); 2679 SCTP_INP_WUNLOCK(inp); 2680 SCTP_INP_INFO_WUNLOCK(); 2681 return (error); 2682 } 2683 } 2684 if (p == NULL) { 2685 SCTP_INP_DECR_REF(inp); 2686 SCTP_INP_WUNLOCK(inp); 2687 SCTP_INP_INFO_WUNLOCK(); 2688 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2689 return (error); 2690 } 2691 SCTP_INP_WUNLOCK(inp); 2692 if (bindall) { 2693 vrf_id = inp->def_vrf_id; 2694 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2695 if (inp_tmp != NULL) { 2696 /* 2697 * lock guy returned and lower count note 2698 * that we are not bound so inp_tmp should 2699 * NEVER be inp. And it is this inp 2700 * (inp_tmp) that gets the reference bump, 2701 * so we must lower it. 2702 */ 2703 SCTP_INP_DECR_REF(inp_tmp); 2704 /* unlock info */ 2705 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2706 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2707 /* 2708 * Ok, must be one-2-one and 2709 * allowing port re-use 2710 */ 2711 port_reuse_active = 1; 2712 goto continue_anyway; 2713 } 2714 SCTP_INP_DECR_REF(inp); 2715 SCTP_INP_INFO_WUNLOCK(); 2716 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2717 return (EADDRINUSE); 2718 } 2719 } else { 2720 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2721 if (inp_tmp != NULL) { 2722 /* 2723 * lock guy returned and lower count note 2724 * that we are not bound so inp_tmp should 2725 * NEVER be inp. And it is this inp 2726 * (inp_tmp) that gets the reference bump, 2727 * so we must lower it. 2728 */ 2729 SCTP_INP_DECR_REF(inp_tmp); 2730 /* unlock info */ 2731 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2732 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2733 /* 2734 * Ok, must be one-2-one and 2735 * allowing port re-use 2736 */ 2737 port_reuse_active = 1; 2738 goto continue_anyway; 2739 } 2740 SCTP_INP_DECR_REF(inp); 2741 SCTP_INP_INFO_WUNLOCK(); 2742 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2743 return (EADDRINUSE); 2744 } 2745 } 2746 continue_anyway: 2747 SCTP_INP_WLOCK(inp); 2748 if (bindall) { 2749 /* verify that no lport is not used by a singleton */ 2750 if ((port_reuse_active == 0) && 2751 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2752 ) { 2753 /* Sorry someone already has this one bound */ 2754 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2755 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2756 port_reuse_active = 1; 2757 } else { 2758 SCTP_INP_DECR_REF(inp); 2759 SCTP_INP_WUNLOCK(inp); 2760 SCTP_INP_INFO_WUNLOCK(); 2761 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2762 return (EADDRINUSE); 2763 } 2764 } 2765 } 2766 } else { 2767 uint16_t first, last, candidate; 2768 uint16_t count; 2769 int done; 2770 2771 if (ip_inp->inp_flags & INP_HIGHPORT) { 2772 first = MODULE_GLOBAL(MOD_INET, ipport_hifirstauto); 2773 last = MODULE_GLOBAL(MOD_INET, ipport_hilastauto); 2774 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2775 if (p && (error = 2776 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2777 )) { 2778 SCTP_INP_DECR_REF(inp); 2779 SCTP_INP_WUNLOCK(inp); 2780 SCTP_INP_INFO_WUNLOCK(); 2781 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2782 return (error); 2783 } 2784 first = MODULE_GLOBAL(MOD_INET, ipport_lowfirstauto); 2785 last = MODULE_GLOBAL(MOD_INET, ipport_lowlastauto); 2786 } else { 2787 first = ipport_firstauto; 2788 last = ipport_lastauto; 2789 } 2790 if (first > last) { 2791 uint16_t temp; 2792 2793 temp = first; 2794 first = last; 2795 last = temp; 2796 } 2797 count = last - first + 1; /* number of candidates */ 2798 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2799 2800 done = 0; 2801 while (!done) { 2802 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2803 done = 1; 2804 } 2805 if (!done) { 2806 if (--count == 0) { 2807 SCTP_INP_DECR_REF(inp); 2808 SCTP_INP_WUNLOCK(inp); 2809 SCTP_INP_INFO_WUNLOCK(); 2810 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2811 return (EADDRINUSE); 2812 } 2813 if (candidate == last) 2814 candidate = first; 2815 else 2816 candidate = candidate + 1; 2817 } 2818 } 2819 lport = htons(candidate); 2820 } 2821 SCTP_INP_DECR_REF(inp); 2822 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2823 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2824 /* 2825 * this really should not happen. The guy did a non-blocking 2826 * bind and then did a close at the same time. 2827 */ 2828 SCTP_INP_WUNLOCK(inp); 2829 SCTP_INP_INFO_WUNLOCK(); 2830 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2831 return (EINVAL); 2832 } 2833 /* ok we look clear to give out this port, so lets setup the binding */ 2834 if (bindall) { 2835 /* binding to all addresses, so just set in the proper flags */ 2836 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2837 /* set the automatic addr changes from kernel flag */ 2838 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2839 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2840 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2841 } else { 2842 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2843 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2844 } 2845 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2846 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2847 } else { 2848 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2849 } 2850 /* 2851 * set the automatic mobility_base from kernel flag (by 2852 * micchie) 2853 */ 2854 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 2855 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 2856 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2857 } else { 2858 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 2859 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2860 } 2861 /* 2862 * set the automatic mobility_fasthandoff from kernel flag 2863 * (by micchie) 2864 */ 2865 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 2866 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 2867 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2868 } else { 2869 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 2870 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2871 } 2872 } else { 2873 /* 2874 * bind specific, make sure flags is off and add a new 2875 * address structure to the sctp_addr_list inside the ep 2876 * structure. 2877 * 2878 * We will need to allocate one and insert it at the head. The 2879 * socketopt call can just insert new addresses in there as 2880 * well. It will also have to do the embed scope kame hack 2881 * too (before adding). 2882 */ 2883 struct sctp_ifa *ifa; 2884 struct sockaddr_storage store_sa; 2885 2886 memset(&store_sa, 0, sizeof(store_sa)); 2887 if (addr->sa_family == AF_INET) { 2888 struct sockaddr_in *sin; 2889 2890 sin = (struct sockaddr_in *)&store_sa; 2891 memcpy(sin, addr, sizeof(struct sockaddr_in)); 2892 sin->sin_port = 0; 2893 } else if (addr->sa_family == AF_INET6) { 2894 struct sockaddr_in6 *sin6; 2895 2896 sin6 = (struct sockaddr_in6 *)&store_sa; 2897 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 2898 sin6->sin6_port = 0; 2899 } 2900 /* 2901 * first find the interface with the bound address need to 2902 * zero out the port to find the address! yuck! can't do 2903 * this earlier since need port for sctp_pcb_findep() 2904 */ 2905 if (sctp_ifap != NULL) 2906 ifa = sctp_ifap; 2907 else { 2908 /* 2909 * Note for BSD we hit here always other O/S's will 2910 * pass things in via the sctp_ifap argument 2911 * (Panda). 2912 */ 2913 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 2914 vrf_id, SCTP_ADDR_NOT_LOCKED); 2915 } 2916 if (ifa == NULL) { 2917 /* Can't find an interface with that address */ 2918 SCTP_INP_WUNLOCK(inp); 2919 SCTP_INP_INFO_WUNLOCK(); 2920 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 2921 return (EADDRNOTAVAIL); 2922 } 2923 if (addr->sa_family == AF_INET6) { 2924 /* GAK, more FIXME IFA lock? */ 2925 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2926 /* Can't bind a non-existent addr. */ 2927 SCTP_INP_WUNLOCK(inp); 2928 SCTP_INP_INFO_WUNLOCK(); 2929 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2930 return (EINVAL); 2931 } 2932 } 2933 /* we're not bound all */ 2934 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 2935 /* allow bindx() to send ASCONF's for binding changes */ 2936 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2937 /* clear automatic addr changes from kernel flag */ 2938 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2939 2940 /* add this address to the endpoint list */ 2941 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 2942 if (error != 0) { 2943 SCTP_INP_WUNLOCK(inp); 2944 SCTP_INP_INFO_WUNLOCK(); 2945 return (error); 2946 } 2947 inp->laddr_count++; 2948 } 2949 /* find the bucket */ 2950 if (port_reuse_active) { 2951 /* Put it into tcp 1-2-1 hash */ 2952 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), 2953 SCTP_BASE_INFO(hashtcpmark))]; 2954 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 2955 } else { 2956 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 2957 SCTP_BASE_INFO(hashmark))]; 2958 } 2959 /* put it in the bucket */ 2960 LIST_INSERT_HEAD(head, inp, sctp_hash); 2961 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 2962 head, ntohs(lport), port_reuse_active); 2963 /* set in the port */ 2964 inp->sctp_lport = lport; 2965 2966 /* turn off just the unbound flag */ 2967 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2968 SCTP_INP_WUNLOCK(inp); 2969 SCTP_INP_INFO_WUNLOCK(); 2970 return (0); 2971 } 2972 2973 2974 static void 2975 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next) 2976 { 2977 struct sctp_iterator *it; 2978 2979 /* 2980 * We enter with the only the ITERATOR_LOCK in place and a write 2981 * lock on the inp_info stuff. 2982 */ 2983 2984 /* 2985 * Go through all iterators, we must do this since it is possible 2986 * that some iterator does NOT have the lock, but is waiting for it. 2987 * And the one that had the lock has either moved in the last 2988 * iteration or we just cleared it above. We need to find all of 2989 * those guys. The list of iterators should never be very big 2990 * though. 2991 */ 2992 TAILQ_FOREACH(it, &SCTP_BASE_INFO(iteratorhead), sctp_nxt_itr) { 2993 if (it == inp->inp_starting_point_for_iterator) 2994 /* skip this guy, he's special */ 2995 continue; 2996 if (it->inp == inp) { 2997 /* 2998 * This is tricky and we DON'T lock the iterator. 2999 * Reason is he's running but waiting for me since 3000 * inp->inp_starting_point_for_iterator has the lock 3001 * on me (the guy above we skipped). This tells us 3002 * its is not running but waiting for 3003 * inp->inp_starting_point_for_iterator to be 3004 * released by the guy that does have our INP in a 3005 * lock. 3006 */ 3007 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3008 it->inp = NULL; 3009 it->stcb = NULL; 3010 } else { 3011 /* set him up to do the next guy not me */ 3012 it->inp = inp_next; 3013 it->stcb = NULL; 3014 } 3015 } 3016 } 3017 it = inp->inp_starting_point_for_iterator; 3018 if (it) { 3019 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3020 it->inp = NULL; 3021 } else { 3022 it->inp = inp_next; 3023 } 3024 it->stcb = NULL; 3025 } 3026 } 3027 3028 /* release sctp_inpcb unbind the port */ 3029 void 3030 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3031 { 3032 /* 3033 * Here we free a endpoint. We must find it (if it is in the Hash 3034 * table) and remove it from there. Then we must also find it in the 3035 * overall list and remove it from there. After all removals are 3036 * complete then any timer has to be stopped. Then start the actual 3037 * freeing. a) Any local lists. b) Any associations. c) The hash of 3038 * all associations. d) finally the ep itself. 3039 */ 3040 struct sctp_pcb *m; 3041 struct sctp_inpcb *inp_save; 3042 struct sctp_tcb *asoc, *nasoc; 3043 struct sctp_laddr *laddr, *nladdr; 3044 struct inpcb *ip_pcb; 3045 struct socket *so; 3046 3047 struct sctp_queued_to_read *sq; 3048 3049 3050 int cnt; 3051 sctp_sharedkey_t *shared_key; 3052 3053 3054 #ifdef SCTP_LOG_CLOSING 3055 sctp_log_closing(inp, NULL, 0); 3056 #endif 3057 SCTP_ITERATOR_LOCK(); 3058 so = inp->sctp_socket; 3059 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3060 /* been here before.. eeks.. get out of here */ 3061 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3062 SCTP_ITERATOR_UNLOCK(); 3063 #ifdef SCTP_LOG_CLOSING 3064 sctp_log_closing(inp, NULL, 1); 3065 #endif 3066 return; 3067 } 3068 SCTP_ASOC_CREATE_LOCK(inp); 3069 SCTP_INP_INFO_WLOCK(); 3070 3071 SCTP_INP_WLOCK(inp); 3072 /* First time through we have the socket lock, after that no more. */ 3073 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3074 /* 3075 * Once we are in we can remove the flag from = 1 is only 3076 * passed from the actual closing routines that are called 3077 * via the sockets layer. 3078 */ 3079 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3080 /* socket is gone, so no more wakeups allowed */ 3081 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3082 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3083 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3084 } 3085 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3086 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3087 3088 if (inp->control) { 3089 sctp_m_freem(inp->control); 3090 inp->control = NULL; 3091 } 3092 if (inp->pkt) { 3093 sctp_m_freem(inp->pkt); 3094 inp->pkt = NULL; 3095 } 3096 m = &inp->sctp_ep; 3097 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3098 * here but I will be nice :> (i.e. 3099 * ip_pcb = ep;) */ 3100 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3101 int cnt_in_sd; 3102 3103 cnt_in_sd = 0; 3104 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 3105 asoc = nasoc) { 3106 SCTP_TCB_LOCK(asoc); 3107 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3108 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3109 /* Skip guys being freed */ 3110 /* asoc->sctp_socket = NULL; FIXME MT */ 3111 cnt_in_sd++; 3112 SCTP_TCB_UNLOCK(asoc); 3113 continue; 3114 } 3115 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3116 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 3117 /* 3118 * If we have data in queue, we don't want 3119 * to just free since the app may have done, 3120 * send()/close or connect/send/close. And 3121 * it wants the data to get across first. 3122 */ 3123 /* Just abandon things in the front states */ 3124 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3125 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3126 cnt_in_sd++; 3127 } 3128 continue; 3129 } 3130 /* Disconnect the socket please */ 3131 asoc->sctp_socket = NULL; 3132 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3133 if ((asoc->asoc.size_on_reasm_queue > 0) || 3134 (asoc->asoc.control_pdapi) || 3135 (asoc->asoc.size_on_all_streams > 0) || 3136 (so && (so->so_rcv.sb_cc > 0)) 3137 ) { 3138 /* Left with Data unread */ 3139 struct mbuf *op_err; 3140 3141 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3142 0, M_DONTWAIT, 1, MT_DATA); 3143 if (op_err) { 3144 /* Fill in the user initiated abort */ 3145 struct sctp_paramhdr *ph; 3146 uint32_t *ippp; 3147 3148 SCTP_BUF_LEN(op_err) = 3149 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3150 ph = mtod(op_err, 3151 struct sctp_paramhdr *); 3152 ph->param_type = htons( 3153 SCTP_CAUSE_USER_INITIATED_ABT); 3154 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3155 ippp = (uint32_t *) (ph + 1); 3156 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3157 } 3158 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3159 #if defined(SCTP_PANIC_ON_ABORT) 3160 panic("inpcb_free does an abort"); 3161 #endif 3162 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3163 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3164 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3165 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3166 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3167 } 3168 if (sctp_free_assoc(inp, asoc, 3169 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3170 cnt_in_sd++; 3171 } 3172 continue; 3173 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3174 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3175 (asoc->asoc.stream_queue_cnt == 0) 3176 ) { 3177 if (asoc->asoc.locked_on_sending) { 3178 goto abort_anyway; 3179 } 3180 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3181 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3182 /* 3183 * there is nothing queued to send, 3184 * so I send shutdown 3185 */ 3186 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 3187 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3188 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3189 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3190 } 3191 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3192 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3193 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3194 asoc->asoc.primary_destination); 3195 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3196 asoc->asoc.primary_destination); 3197 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3198 } 3199 } else { 3200 /* mark into shutdown pending */ 3201 struct sctp_stream_queue_pending *sp; 3202 3203 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3204 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3205 asoc->asoc.primary_destination); 3206 if (asoc->asoc.locked_on_sending) { 3207 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3208 sctp_streamhead); 3209 if (sp == NULL) { 3210 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3211 asoc->asoc.locked_on_sending, 3212 asoc->asoc.locked_on_sending->stream_no); 3213 } else { 3214 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3215 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3216 } 3217 } 3218 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3219 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3220 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3221 struct mbuf *op_err; 3222 3223 abort_anyway: 3224 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3225 0, M_DONTWAIT, 1, MT_DATA); 3226 if (op_err) { 3227 /* 3228 * Fill in the user 3229 * initiated abort 3230 */ 3231 struct sctp_paramhdr *ph; 3232 uint32_t *ippp; 3233 3234 SCTP_BUF_LEN(op_err) = 3235 (sizeof(struct sctp_paramhdr) + 3236 sizeof(uint32_t)); 3237 ph = mtod(op_err, 3238 struct sctp_paramhdr *); 3239 ph->param_type = htons( 3240 SCTP_CAUSE_USER_INITIATED_ABT); 3241 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3242 ippp = (uint32_t *) (ph + 1); 3243 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3244 } 3245 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3246 #if defined(SCTP_PANIC_ON_ABORT) 3247 panic("inpcb_free does an abort"); 3248 #endif 3249 3250 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3251 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3252 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3253 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3254 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3255 } 3256 if (sctp_free_assoc(inp, asoc, 3257 SCTP_PCBFREE_NOFORCE, 3258 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3259 cnt_in_sd++; 3260 } 3261 continue; 3262 } else { 3263 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3264 } 3265 } 3266 cnt_in_sd++; 3267 SCTP_TCB_UNLOCK(asoc); 3268 } 3269 /* now is there some left in our SHUTDOWN state? */ 3270 if (cnt_in_sd) { 3271 SCTP_INP_WUNLOCK(inp); 3272 SCTP_ASOC_CREATE_UNLOCK(inp); 3273 SCTP_INP_INFO_WUNLOCK(); 3274 SCTP_ITERATOR_UNLOCK(); 3275 #ifdef SCTP_LOG_CLOSING 3276 sctp_log_closing(inp, NULL, 2); 3277 #endif 3278 return; 3279 } 3280 } 3281 inp->sctp_socket = NULL; 3282 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3283 SCTP_PCB_FLAGS_UNBOUND) { 3284 /* 3285 * ok, this guy has been bound. It's port is somewhere in 3286 * the SCTP_BASE_INFO(hash table). Remove it! 3287 */ 3288 LIST_REMOVE(inp, sctp_hash); 3289 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3290 } 3291 /* 3292 * If there is a timer running to kill us, forget it, since it may 3293 * have a contest on the INP lock.. which would cause us to die ... 3294 */ 3295 cnt = 0; 3296 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 3297 asoc = nasoc) { 3298 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3299 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3300 cnt++; 3301 continue; 3302 } 3303 /* Free associations that are NOT killing us */ 3304 SCTP_TCB_LOCK(asoc); 3305 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3306 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3307 struct mbuf *op_err; 3308 uint32_t *ippp; 3309 3310 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3311 0, M_DONTWAIT, 1, MT_DATA); 3312 if (op_err) { 3313 /* Fill in the user initiated abort */ 3314 struct sctp_paramhdr *ph; 3315 3316 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3317 sizeof(uint32_t)); 3318 ph = mtod(op_err, struct sctp_paramhdr *); 3319 ph->param_type = htons( 3320 SCTP_CAUSE_USER_INITIATED_ABT); 3321 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3322 ippp = (uint32_t *) (ph + 1); 3323 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3324 3325 } 3326 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3327 #if defined(SCTP_PANIC_ON_ABORT) 3328 panic("inpcb_free does an abort"); 3329 #endif 3330 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3331 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3332 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3333 cnt++; 3334 SCTP_TCB_UNLOCK(asoc); 3335 continue; 3336 } 3337 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3338 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3339 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3340 } 3341 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3342 cnt++; 3343 } 3344 } 3345 if (cnt) { 3346 /* Ok we have someone out there that will kill us */ 3347 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3348 SCTP_INP_WUNLOCK(inp); 3349 SCTP_ASOC_CREATE_UNLOCK(inp); 3350 SCTP_INP_INFO_WUNLOCK(); 3351 SCTP_ITERATOR_UNLOCK(); 3352 #ifdef SCTP_LOG_CLOSING 3353 sctp_log_closing(inp, NULL, 3); 3354 #endif 3355 return; 3356 } 3357 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3358 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3359 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3360 SCTP_INP_WUNLOCK(inp); 3361 SCTP_ASOC_CREATE_UNLOCK(inp); 3362 SCTP_INP_INFO_WUNLOCK(); 3363 SCTP_ITERATOR_UNLOCK(); 3364 #ifdef SCTP_LOG_CLOSING 3365 sctp_log_closing(inp, NULL, 4); 3366 #endif 3367 return; 3368 } 3369 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3370 inp->sctp_ep.signature_change.type = 0; 3371 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3372 3373 #ifdef SCTP_LOG_CLOSING 3374 sctp_log_closing(inp, NULL, 5); 3375 #endif 3376 3377 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3378 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE; 3379 /* Clear the read queue */ 3380 /* sa_ignore FREED_MEMORY */ 3381 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { 3382 /* Its only abandoned if it had data left */ 3383 if (sq->length) 3384 SCTP_STAT_INCR(sctps_left_abandon); 3385 3386 TAILQ_REMOVE(&inp->read_queue, sq, next); 3387 sctp_free_remote_addr(sq->whoFrom); 3388 if (so) 3389 so->so_rcv.sb_cc -= sq->length; 3390 if (sq->data) { 3391 sctp_m_freem(sq->data); 3392 sq->data = NULL; 3393 } 3394 /* 3395 * no need to free the net count, since at this point all 3396 * assoc's are gone. 3397 */ 3398 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3399 SCTP_DECR_READQ_COUNT(); 3400 } 3401 /* Now the sctp_pcb things */ 3402 /* 3403 * free each asoc if it is not already closed/free. we can't use the 3404 * macro here since le_next will get freed as part of the 3405 * sctp_free_assoc() call. 3406 */ 3407 cnt = 0; 3408 if (so) { 3409 #ifdef IPSEC 3410 ipsec4_delete_pcbpolicy(ip_pcb); 3411 #endif /* IPSEC */ 3412 3413 /* Unlocks not needed since the socket is gone now */ 3414 } 3415 if (ip_pcb->inp_options) { 3416 (void)sctp_m_free(ip_pcb->inp_options); 3417 ip_pcb->inp_options = 0; 3418 } 3419 if (ip_pcb->inp_moptions) { 3420 inp_freemoptions(ip_pcb->inp_moptions); 3421 ip_pcb->inp_moptions = 0; 3422 } 3423 #ifdef INET6 3424 if (ip_pcb->inp_vflag & INP_IPV6) { 3425 struct in6pcb *in6p; 3426 3427 in6p = (struct in6pcb *)inp; 3428 ip6_freepcbopts(in6p->in6p_outputopts); 3429 } 3430 #endif /* INET6 */ 3431 ip_pcb->inp_vflag = 0; 3432 /* free up authentication fields */ 3433 if (inp->sctp_ep.local_auth_chunks != NULL) 3434 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3435 if (inp->sctp_ep.local_hmacs != NULL) 3436 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3437 3438 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 3439 while (shared_key) { 3440 LIST_REMOVE(shared_key, next); 3441 sctp_free_sharedkey(shared_key); 3442 /* sa_ignore FREED_MEMORY */ 3443 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 3444 } 3445 3446 inp_save = LIST_NEXT(inp, sctp_list); 3447 LIST_REMOVE(inp, sctp_list); 3448 3449 /* fix any iterators only after out of the list */ 3450 sctp_iterator_inp_being_freed(inp, inp_save); 3451 /* 3452 * if we have an address list the following will free the list of 3453 * ifaddr's that are set into this ep. Again macro limitations here, 3454 * since the LIST_FOREACH could be a bad idea. 3455 */ 3456 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; 3457 laddr = nladdr) { 3458 nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 3459 sctp_remove_laddr(laddr); 3460 } 3461 3462 #ifdef SCTP_TRACK_FREED_ASOCS 3463 /* TEMP CODE */ 3464 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; 3465 asoc = nasoc) { 3466 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3467 LIST_REMOVE(asoc, sctp_tcblist); 3468 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3469 SCTP_DECR_ASOC_COUNT(); 3470 } 3471 /* *** END TEMP CODE *** */ 3472 #endif 3473 /* Now lets see about freeing the EP hash table. */ 3474 if (inp->sctp_tcbhash != NULL) { 3475 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3476 inp->sctp_tcbhash = NULL; 3477 } 3478 /* Now we must put the ep memory back into the zone pool */ 3479 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3480 SCTP_INP_LOCK_DESTROY(inp); 3481 SCTP_INP_READ_DESTROY(inp); 3482 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3483 SCTP_INP_INFO_WUNLOCK(); 3484 SCTP_ITERATOR_UNLOCK(); 3485 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3486 SCTP_DECR_EP_COUNT(); 3487 } 3488 3489 3490 struct sctp_nets * 3491 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3492 { 3493 struct sctp_nets *net; 3494 3495 /* locate the address */ 3496 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3497 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3498 return (net); 3499 } 3500 return (NULL); 3501 } 3502 3503 3504 int 3505 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3506 { 3507 struct sctp_ifa *sctp_ifa; 3508 3509 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3510 if (sctp_ifa) { 3511 return (1); 3512 } else { 3513 return (0); 3514 } 3515 } 3516 3517 /* 3518 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3519 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3520 * stats of stuff. 3521 */ 3522 int 3523 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3524 int set_scope, int from) 3525 { 3526 /* 3527 * The following is redundant to the same lines in the 3528 * sctp_aloc_assoc() but is needed since other's call the add 3529 * address function 3530 */ 3531 struct sctp_nets *net, *netfirst; 3532 int addr_inscope; 3533 3534 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3535 from); 3536 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3537 3538 netfirst = sctp_findnet(stcb, newaddr); 3539 if (netfirst) { 3540 /* 3541 * Lie and return ok, we don't want to make the association 3542 * go away for this behavior. It will happen in the TCP 3543 * model in a connected socket. It does not reach the hash 3544 * table until after the association is built so it can't be 3545 * found. Mark as reachable, since the initial creation will 3546 * have been cleared and the NOT_IN_ASSOC flag will have 3547 * been added... and we don't want to end up removing it 3548 * back out. 3549 */ 3550 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3551 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3552 SCTP_ADDR_UNCONFIRMED); 3553 } else { 3554 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3555 } 3556 3557 return (0); 3558 } 3559 addr_inscope = 1; 3560 if (newaddr->sa_family == AF_INET) { 3561 struct sockaddr_in *sin; 3562 3563 sin = (struct sockaddr_in *)newaddr; 3564 if (sin->sin_addr.s_addr == 0) { 3565 /* Invalid address */ 3566 return (-1); 3567 } 3568 /* zero out the bzero area */ 3569 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3570 3571 /* assure len is set */ 3572 sin->sin_len = sizeof(struct sockaddr_in); 3573 if (set_scope) { 3574 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3575 stcb->ipv4_local_scope = 1; 3576 #else 3577 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3578 stcb->asoc.ipv4_local_scope = 1; 3579 } 3580 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3581 } else { 3582 /* Validate the address is in scope */ 3583 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3584 (stcb->asoc.ipv4_local_scope == 0)) { 3585 addr_inscope = 0; 3586 } 3587 } 3588 #ifdef INET6 3589 } else if (newaddr->sa_family == AF_INET6) { 3590 struct sockaddr_in6 *sin6; 3591 3592 sin6 = (struct sockaddr_in6 *)newaddr; 3593 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3594 /* Invalid address */ 3595 return (-1); 3596 } 3597 /* assure len is set */ 3598 sin6->sin6_len = sizeof(struct sockaddr_in6); 3599 if (set_scope) { 3600 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3601 stcb->asoc.loopback_scope = 1; 3602 stcb->asoc.local_scope = 0; 3603 stcb->asoc.ipv4_local_scope = 1; 3604 stcb->asoc.site_scope = 1; 3605 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3606 /* 3607 * If the new destination is a LINK_LOCAL we 3608 * must have common site scope. Don't set 3609 * the local scope since we may not share 3610 * all links, only loopback can do this. 3611 * Links on the local network would also be 3612 * on our private network for v4 too. 3613 */ 3614 stcb->asoc.ipv4_local_scope = 1; 3615 stcb->asoc.site_scope = 1; 3616 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3617 /* 3618 * If the new destination is SITE_LOCAL then 3619 * we must have site scope in common. 3620 */ 3621 stcb->asoc.site_scope = 1; 3622 } 3623 } else { 3624 /* Validate the address is in scope */ 3625 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3626 (stcb->asoc.loopback_scope == 0)) { 3627 addr_inscope = 0; 3628 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3629 (stcb->asoc.local_scope == 0)) { 3630 addr_inscope = 0; 3631 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3632 (stcb->asoc.site_scope == 0)) { 3633 addr_inscope = 0; 3634 } 3635 } 3636 #endif 3637 } else { 3638 /* not supported family type */ 3639 return (-1); 3640 } 3641 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3642 if (net == NULL) { 3643 return (-1); 3644 } 3645 SCTP_INCR_RADDR_COUNT(); 3646 bzero(net, sizeof(*net)); 3647 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3648 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3649 if (newaddr->sa_family == AF_INET) { 3650 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3651 } else if (newaddr->sa_family == AF_INET6) { 3652 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3653 } 3654 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3655 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3656 stcb->asoc.loopback_scope = 1; 3657 stcb->asoc.ipv4_local_scope = 1; 3658 stcb->asoc.local_scope = 0; 3659 stcb->asoc.site_scope = 1; 3660 addr_inscope = 1; 3661 } 3662 net->failure_threshold = stcb->asoc.def_net_failure; 3663 if (addr_inscope == 0) { 3664 net->dest_state = (SCTP_ADDR_REACHABLE | 3665 SCTP_ADDR_OUT_OF_SCOPE); 3666 } else { 3667 if (from == SCTP_ADDR_IS_CONFIRMED) 3668 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3669 net->dest_state = SCTP_ADDR_REACHABLE; 3670 else 3671 net->dest_state = SCTP_ADDR_REACHABLE | 3672 SCTP_ADDR_UNCONFIRMED; 3673 } 3674 /* 3675 * We set this to 0, the timer code knows that this means its an 3676 * initial value 3677 */ 3678 net->RTO = 0; 3679 net->RTO_measured = 0; 3680 stcb->asoc.numnets++; 3681 *(&net->ref_count) = 1; 3682 net->tos_flowlabel = 0; 3683 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 3684 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 3685 } else { 3686 net->port = 0; 3687 } 3688 #ifdef INET 3689 if (newaddr->sa_family == AF_INET) 3690 net->tos_flowlabel = stcb->asoc.default_tos; 3691 #endif 3692 #ifdef INET6 3693 if (newaddr->sa_family == AF_INET6) 3694 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3695 #endif 3696 /* Init the timer structure */ 3697 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3698 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3699 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3700 3701 /* Now generate a route for this guy */ 3702 #ifdef INET6 3703 /* KAME hack: embed scopeid */ 3704 if (newaddr->sa_family == AF_INET6) { 3705 struct sockaddr_in6 *sin6; 3706 3707 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3708 (void)sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)); 3709 sin6->sin6_scope_id = 0; 3710 } 3711 #endif 3712 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3713 3714 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3715 /* Get source address */ 3716 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3717 stcb, 3718 (sctp_route_t *) & net->ro, 3719 net, 3720 0, 3721 stcb->asoc.vrf_id); 3722 /* Now get the interface MTU */ 3723 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3724 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3725 } else { 3726 net->mtu = 0; 3727 } 3728 #ifdef SCTP_PRINT_FOR_B_AND_M 3729 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu); 3730 #endif 3731 if (net->mtu == 0) { 3732 /* Huh ?? */ 3733 net->mtu = SCTP_DEFAULT_MTU; 3734 } else { 3735 uint32_t rmtu; 3736 3737 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3738 #ifdef SCTP_PRINT_FOR_B_AND_M 3739 SCTP_PRINTF("The route mtu is %d\n", rmtu); 3740 #endif 3741 if (rmtu == 0) { 3742 /* 3743 * Start things off to match mtu of 3744 * interface please. 3745 */ 3746 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3747 net->ro.ro_rt, net->mtu); 3748 } else { 3749 /* 3750 * we take the route mtu over the interface, 3751 * since the route may be leading out the 3752 * loopback, or a different interface. 3753 */ 3754 net->mtu = rmtu; 3755 } 3756 } 3757 if (from == SCTP_ALLOC_ASOC) { 3758 #ifdef SCTP_PRINT_FOR_B_AND_M 3759 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu); 3760 #endif 3761 stcb->asoc.smallest_mtu = net->mtu; 3762 } 3763 } else { 3764 net->mtu = stcb->asoc.smallest_mtu; 3765 } 3766 #ifdef INET6 3767 if (newaddr->sa_family == AF_INET6) { 3768 struct sockaddr_in6 *sin6; 3769 3770 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3771 (void)sa6_recoverscope(sin6); 3772 } 3773 #endif 3774 if (net->port) { 3775 net->mtu -= sizeof(struct udphdr); 3776 } 3777 if (stcb->asoc.smallest_mtu > net->mtu) { 3778 #ifdef SCTP_PRINT_FOR_B_AND_M 3779 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n", 3780 net->mtu, stcb->asoc.smallest_mtu); 3781 #endif 3782 stcb->asoc.smallest_mtu = net->mtu; 3783 } 3784 /* JRS - Use the congestion control given in the CC module */ 3785 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 3786 3787 /* 3788 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3789 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3790 */ 3791 net->find_pseudo_cumack = 1; 3792 net->find_rtx_pseudo_cumack = 1; 3793 net->src_addr_selected = 0; 3794 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3795 if (net->ro.ro_rt == NULL) { 3796 /* Since we have no route put it at the back */ 3797 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3798 } else if (netfirst == NULL) { 3799 /* We are the first one in the pool. */ 3800 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3801 } else if (netfirst->ro.ro_rt == NULL) { 3802 /* 3803 * First one has NO route. Place this one ahead of the first 3804 * one. 3805 */ 3806 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3807 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3808 /* 3809 * This one has a different interface than the one at the 3810 * top of the list. Place it ahead. 3811 */ 3812 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3813 } else { 3814 /* 3815 * Ok we have the same interface as the first one. Move 3816 * forward until we find either a) one with a NULL route... 3817 * insert ahead of that b) one with a different ifp.. insert 3818 * after that. c) end of the list.. insert at the tail. 3819 */ 3820 struct sctp_nets *netlook; 3821 3822 do { 3823 netlook = TAILQ_NEXT(netfirst, sctp_next); 3824 if (netlook == NULL) { 3825 /* End of the list */ 3826 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3827 break; 3828 } else if (netlook->ro.ro_rt == NULL) { 3829 /* next one has NO route */ 3830 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 3831 break; 3832 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 3833 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 3834 net, sctp_next); 3835 break; 3836 } 3837 /* Shift forward */ 3838 netfirst = netlook; 3839 } while (netlook != NULL); 3840 } 3841 3842 /* got to have a primary set */ 3843 if (stcb->asoc.primary_destination == 0) { 3844 stcb->asoc.primary_destination = net; 3845 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 3846 (net->ro.ro_rt) && 3847 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 3848 /* No route to current primary adopt new primary */ 3849 stcb->asoc.primary_destination = net; 3850 } 3851 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 3852 net); 3853 /* Validate primary is first */ 3854 net = TAILQ_FIRST(&stcb->asoc.nets); 3855 if ((net != stcb->asoc.primary_destination) && 3856 (stcb->asoc.primary_destination)) { 3857 /* 3858 * first one on the list is NOT the primary sctp_cmpaddr() 3859 * is much more efficent if the primary is the first on the 3860 * list, make it so. 3861 */ 3862 TAILQ_REMOVE(&stcb->asoc.nets, 3863 stcb->asoc.primary_destination, sctp_next); 3864 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 3865 stcb->asoc.primary_destination, sctp_next); 3866 } 3867 return (0); 3868 } 3869 3870 3871 /* 3872 * allocate an association and add it to the endpoint. The caller must be 3873 * careful to add all additional addresses once they are know right away or 3874 * else the assoc will be may experience a blackout scenario. 3875 */ 3876 struct sctp_tcb * 3877 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 3878 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id, 3879 struct thread *p 3880 ) 3881 { 3882 /* note the p argument is only valid in unbound sockets */ 3883 3884 struct sctp_tcb *stcb; 3885 struct sctp_association *asoc; 3886 struct sctpasochead *head; 3887 uint16_t rport; 3888 int err; 3889 3890 /* 3891 * Assumption made here: Caller has done a 3892 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 3893 * address does not exist already. 3894 */ 3895 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 3896 /* Hit max assoc, sorry no more */ 3897 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 3898 *error = ENOBUFS; 3899 return (NULL); 3900 } 3901 if (firstaddr == NULL) { 3902 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3903 *error = EINVAL; 3904 return (NULL); 3905 } 3906 SCTP_INP_RLOCK(inp); 3907 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 3908 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 3909 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 3910 /* 3911 * If its in the TCP pool, its NOT allowed to create an 3912 * association. The parent listener needs to call 3913 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 3914 * off, or connected one does this.. its an error. 3915 */ 3916 SCTP_INP_RUNLOCK(inp); 3917 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3918 *error = EINVAL; 3919 return (NULL); 3920 } 3921 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 3922 #ifdef SCTP_DEBUG 3923 if (firstaddr) { 3924 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 3925 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 3926 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 3927 } else { 3928 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 3929 } 3930 #endif /* SCTP_DEBUG */ 3931 if (firstaddr->sa_family == AF_INET) { 3932 struct sockaddr_in *sin; 3933 3934 sin = (struct sockaddr_in *)firstaddr; 3935 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 3936 /* Invalid address */ 3937 SCTP_INP_RUNLOCK(inp); 3938 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3939 *error = EINVAL; 3940 return (NULL); 3941 } 3942 rport = sin->sin_port; 3943 } else if (firstaddr->sa_family == AF_INET6) { 3944 struct sockaddr_in6 *sin6; 3945 3946 sin6 = (struct sockaddr_in6 *)firstaddr; 3947 if ((sin6->sin6_port == 0) || 3948 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 3949 /* Invalid address */ 3950 SCTP_INP_RUNLOCK(inp); 3951 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3952 *error = EINVAL; 3953 return (NULL); 3954 } 3955 rport = sin6->sin6_port; 3956 } else { 3957 /* not supported family type */ 3958 SCTP_INP_RUNLOCK(inp); 3959 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3960 *error = EINVAL; 3961 return (NULL); 3962 } 3963 SCTP_INP_RUNLOCK(inp); 3964 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 3965 /* 3966 * If you have not performed a bind, then we need to do the 3967 * ephemerial bind for you. 3968 */ 3969 if ((err = sctp_inpcb_bind(inp->sctp_socket, 3970 (struct sockaddr *)NULL, 3971 (struct sctp_ifa *)NULL, 3972 p 3973 ))) { 3974 /* bind error, probably perm */ 3975 *error = err; 3976 return (NULL); 3977 } 3978 } 3979 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 3980 if (stcb == NULL) { 3981 /* out of memory? */ 3982 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 3983 *error = ENOMEM; 3984 return (NULL); 3985 } 3986 SCTP_INCR_ASOC_COUNT(); 3987 3988 bzero(stcb, sizeof(*stcb)); 3989 asoc = &stcb->asoc; 3990 SCTP_TCB_LOCK_INIT(stcb); 3991 SCTP_TCB_SEND_LOCK_INIT(stcb); 3992 /* setup back pointer's */ 3993 stcb->sctp_ep = inp; 3994 stcb->sctp_socket = inp->sctp_socket; 3995 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) { 3996 /* failed */ 3997 SCTP_TCB_LOCK_DESTROY(stcb); 3998 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 3999 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4000 SCTP_DECR_ASOC_COUNT(); 4001 *error = err; 4002 return (NULL); 4003 } 4004 /* and the port */ 4005 stcb->rport = rport; 4006 SCTP_INP_INFO_WLOCK(); 4007 SCTP_INP_WLOCK(inp); 4008 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4009 /* inpcb freed while alloc going on */ 4010 SCTP_TCB_LOCK_DESTROY(stcb); 4011 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4012 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4013 SCTP_INP_WUNLOCK(inp); 4014 SCTP_INP_INFO_WUNLOCK(); 4015 SCTP_DECR_ASOC_COUNT(); 4016 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4017 *error = EINVAL; 4018 return (NULL); 4019 } 4020 SCTP_TCB_LOCK(stcb); 4021 4022 /* now that my_vtag is set, add it to the hash */ 4023 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, 4024 SCTP_BASE_INFO(hashasocmark))]; 4025 /* put it in the bucket in the vtag hash of assoc's for the system */ 4026 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4027 sctp_delete_from_timewait(stcb->asoc.my_vtag); 4028 4029 SCTP_INP_INFO_WUNLOCK(); 4030 4031 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4032 /* failure.. memory error? */ 4033 if (asoc->strmout) { 4034 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4035 asoc->strmout = NULL; 4036 } 4037 if (asoc->mapping_array) { 4038 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4039 asoc->mapping_array = NULL; 4040 } 4041 SCTP_DECR_ASOC_COUNT(); 4042 SCTP_TCB_LOCK_DESTROY(stcb); 4043 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4044 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4045 SCTP_INP_WUNLOCK(inp); 4046 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4047 *error = ENOBUFS; 4048 return (NULL); 4049 } 4050 /* Init all the timers */ 4051 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 4052 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4053 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4054 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4055 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4056 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4057 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4058 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4059 4060 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4061 /* now file the port under the hash as well */ 4062 if (inp->sctp_tcbhash != NULL) { 4063 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4064 inp->sctp_hashmark)]; 4065 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4066 } 4067 SCTP_INP_WUNLOCK(inp); 4068 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4069 return (stcb); 4070 } 4071 4072 4073 void 4074 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4075 { 4076 struct sctp_association *asoc; 4077 4078 asoc = &stcb->asoc; 4079 asoc->numnets--; 4080 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4081 if (net == asoc->primary_destination) { 4082 /* Reset primary */ 4083 struct sctp_nets *lnet; 4084 4085 lnet = TAILQ_FIRST(&asoc->nets); 4086 /* 4087 * Mobility adaptation Ideally, if deleted destination is 4088 * the primary, it becomes a fast retransmission trigger by 4089 * the subsequent SET PRIMARY. (by micchie) 4090 */ 4091 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4092 SCTP_MOBILITY_BASE) || 4093 sctp_is_mobility_feature_on(stcb->sctp_ep, 4094 SCTP_MOBILITY_FASTHANDOFF)) { 4095 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4096 if (asoc->deleted_primary != NULL) { 4097 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4098 goto out; 4099 } 4100 asoc->deleted_primary = net; 4101 atomic_add_int(&net->ref_count, 1); 4102 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4103 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4104 sctp_mobility_feature_on(stcb->sctp_ep, 4105 SCTP_MOBILITY_PRIM_DELETED); 4106 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4107 stcb->sctp_ep, stcb, NULL); 4108 } 4109 out: 4110 /* Try to find a confirmed primary */ 4111 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4112 } 4113 if (net == asoc->last_data_chunk_from) { 4114 /* Reset primary */ 4115 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4116 } 4117 if (net == asoc->last_control_chunk_from) { 4118 /* Clear net */ 4119 asoc->last_control_chunk_from = NULL; 4120 } 4121 sctp_free_remote_addr(net); 4122 } 4123 4124 /* 4125 * remove a remote endpoint address from an association, it will fail if the 4126 * address does not exist. 4127 */ 4128 int 4129 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4130 { 4131 /* 4132 * Here we need to remove a remote address. This is quite simple, we 4133 * first find it in the list of address for the association 4134 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4135 * on that item. Note we do not allow it to be removed if there are 4136 * no other addresses. 4137 */ 4138 struct sctp_association *asoc; 4139 struct sctp_nets *net, *net_tmp; 4140 4141 asoc = &stcb->asoc; 4142 4143 /* locate the address */ 4144 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { 4145 net_tmp = TAILQ_NEXT(net, sctp_next); 4146 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4147 continue; 4148 } 4149 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4150 remaddr)) { 4151 /* we found the guy */ 4152 if (asoc->numnets < 2) { 4153 /* Must have at LEAST two remote addresses */ 4154 return (-1); 4155 } else { 4156 sctp_remove_net(stcb, net); 4157 return (0); 4158 } 4159 } 4160 } 4161 /* not found. */ 4162 return (-2); 4163 } 4164 4165 void 4166 sctp_delete_from_timewait(uint32_t tag) 4167 { 4168 struct sctpvtaghead *chain; 4169 struct sctp_tagblock *twait_block; 4170 int found = 0; 4171 int i; 4172 4173 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4174 if (!SCTP_LIST_EMPTY(chain)) { 4175 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4176 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4177 if (twait_block->vtag_block[i].v_tag == tag) { 4178 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4179 twait_block->vtag_block[i].v_tag = 0; 4180 found = 1; 4181 break; 4182 } 4183 } 4184 if (found) 4185 break; 4186 } 4187 } 4188 } 4189 4190 int 4191 sctp_is_in_timewait(uint32_t tag) 4192 { 4193 struct sctpvtaghead *chain; 4194 struct sctp_tagblock *twait_block; 4195 int found = 0; 4196 int i; 4197 4198 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4199 if (!SCTP_LIST_EMPTY(chain)) { 4200 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4201 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4202 if (twait_block->vtag_block[i].v_tag == tag) { 4203 found = 1; 4204 break; 4205 } 4206 } 4207 if (found) 4208 break; 4209 } 4210 } 4211 return (found); 4212 } 4213 4214 4215 void 4216 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time) 4217 { 4218 struct sctpvtaghead *chain; 4219 struct sctp_tagblock *twait_block; 4220 struct timeval now; 4221 int set, i; 4222 4223 (void)SCTP_GETTIME_TIMEVAL(&now); 4224 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4225 set = 0; 4226 if (!SCTP_LIST_EMPTY(chain)) { 4227 /* Block(s) present, lets find space, and expire on the fly */ 4228 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4229 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4230 if ((twait_block->vtag_block[i].v_tag == 0) && 4231 !set) { 4232 twait_block->vtag_block[i].tv_sec_at_expire = 4233 now.tv_sec + time; 4234 twait_block->vtag_block[i].v_tag = tag; 4235 set = 1; 4236 } else if ((twait_block->vtag_block[i].v_tag) && 4237 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4238 /* Audit expires this guy */ 4239 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4240 twait_block->vtag_block[i].v_tag = 0; 4241 if (set == 0) { 4242 /* Reuse it for my new tag */ 4243 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4244 twait_block->vtag_block[0].v_tag = tag; 4245 set = 1; 4246 } 4247 } 4248 } 4249 if (set) { 4250 /* 4251 * We only do up to the block where we can 4252 * place our tag for audits 4253 */ 4254 break; 4255 } 4256 } 4257 } 4258 /* Need to add a new block to chain */ 4259 if (!set) { 4260 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4261 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4262 if (twait_block == NULL) { 4263 return; 4264 } 4265 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4266 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4267 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4268 twait_block->vtag_block[0].v_tag = tag; 4269 } 4270 } 4271 4272 4273 static void 4274 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4275 { 4276 struct sctp_iterator *it; 4277 4278 /* 4279 * Unlock the tcb lock we do this so we avoid a dead lock scenario 4280 * where the iterator is waiting on the TCB lock and the TCB lock is 4281 * waiting on the iterator lock. 4282 */ 4283 it = stcb->asoc.stcb_starting_point_for_iterator; 4284 if (it == NULL) { 4285 return; 4286 } 4287 if (it->inp != stcb->sctp_ep) { 4288 /* hmm, focused on the wrong one? */ 4289 return; 4290 } 4291 if (it->stcb != stcb) { 4292 return; 4293 } 4294 it->stcb = LIST_NEXT(stcb, sctp_tcblist); 4295 if (it->stcb == NULL) { 4296 /* done with all asoc's in this assoc */ 4297 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 4298 it->inp = NULL; 4299 } else { 4300 it->inp = LIST_NEXT(inp, sctp_list); 4301 } 4302 } 4303 } 4304 4305 4306 /*- 4307 * Free the association after un-hashing the remote port. This 4308 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4309 * expect that the input to this function IS a locked TCB. 4310 * It will return 0, if it did NOT destroy the association (instead 4311 * it unlocks it. It will return NON-zero if it either destroyed the 4312 * association OR the association is already destroyed. 4313 */ 4314 int 4315 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4316 { 4317 int i; 4318 struct sctp_association *asoc; 4319 struct sctp_nets *net, *prev; 4320 struct sctp_laddr *laddr; 4321 struct sctp_tmit_chunk *chk; 4322 struct sctp_asconf_addr *aparam; 4323 struct sctp_asconf_ack *aack; 4324 struct sctp_stream_reset_list *liste; 4325 struct sctp_queued_to_read *sq; 4326 struct sctp_stream_queue_pending *sp; 4327 sctp_sharedkey_t *shared_key; 4328 struct socket *so; 4329 int ccnt = 0; 4330 int cnt = 0; 4331 4332 /* first, lets purge the entry from the hash table. */ 4333 4334 #ifdef SCTP_LOG_CLOSING 4335 sctp_log_closing(inp, stcb, 6); 4336 #endif 4337 if (stcb->asoc.state == 0) { 4338 #ifdef SCTP_LOG_CLOSING 4339 sctp_log_closing(inp, NULL, 7); 4340 #endif 4341 /* there is no asoc, really TSNH :-0 */ 4342 return (1); 4343 } 4344 /* TEMP CODE */ 4345 if (stcb->freed_from_where == 0) { 4346 /* Only record the first place free happened from */ 4347 stcb->freed_from_where = from_location; 4348 } 4349 /* TEMP CODE */ 4350 4351 asoc = &stcb->asoc; 4352 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4353 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4354 /* nothing around */ 4355 so = NULL; 4356 else 4357 so = inp->sctp_socket; 4358 4359 /* 4360 * We used timer based freeing if a reader or writer is in the way. 4361 * So we first check if we are actually being called from a timer, 4362 * if so we abort early if a reader or writer is still in the way. 4363 */ 4364 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4365 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4366 /* 4367 * is it the timer driving us? if so are the reader/writers 4368 * gone? 4369 */ 4370 if (stcb->asoc.refcnt) { 4371 /* nope, reader or writer in the way */ 4372 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4373 /* no asoc destroyed */ 4374 SCTP_TCB_UNLOCK(stcb); 4375 #ifdef SCTP_LOG_CLOSING 4376 sctp_log_closing(inp, stcb, 8); 4377 #endif 4378 return (0); 4379 } 4380 } 4381 /* now clean up any other timers */ 4382 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4383 asoc->hb_timer.self = NULL; 4384 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4385 asoc->dack_timer.self = NULL; 4386 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4387 /*- 4388 * For stream reset we don't blast this unless 4389 * it is a str-reset timer, it might be the 4390 * free-asoc timer which we DON'T want to 4391 * disturb. 4392 */ 4393 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4394 asoc->strreset_timer.self = NULL; 4395 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4396 asoc->asconf_timer.self = NULL; 4397 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4398 asoc->autoclose_timer.self = NULL; 4399 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4400 asoc->shut_guard_timer.self = NULL; 4401 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4402 asoc->delayed_event_timer.self = NULL; 4403 /* Mobility adaptation */ 4404 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4405 asoc->delete_prim_timer.self = NULL; 4406 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4407 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4408 net->fr_timer.self = NULL; 4409 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4410 net->rxt_timer.self = NULL; 4411 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4412 net->pmtu_timer.self = NULL; 4413 } 4414 /* Now the read queue needs to be cleaned up (only once) */ 4415 cnt = 0; 4416 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4417 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4418 SCTP_INP_READ_LOCK(inp); 4419 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4420 if (sq->stcb == stcb) { 4421 sq->do_not_ref_stcb = 1; 4422 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4423 /* 4424 * If there is no end, there never will be 4425 * now. 4426 */ 4427 if (sq->end_added == 0) { 4428 /* Held for PD-API clear that. */ 4429 sq->pdapi_aborted = 1; 4430 sq->held_length = 0; 4431 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4432 /* 4433 * Need to add a PD-API 4434 * aborted indication. 4435 * Setting the control_pdapi 4436 * assures that it will be 4437 * added right after this 4438 * msg. 4439 */ 4440 uint32_t strseq; 4441 4442 stcb->asoc.control_pdapi = sq; 4443 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4444 sctp_notify_partial_delivery_indication(stcb, 4445 SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq); 4446 stcb->asoc.control_pdapi = NULL; 4447 } 4448 } 4449 /* Add an end to wake them */ 4450 sq->end_added = 1; 4451 cnt++; 4452 } 4453 } 4454 SCTP_INP_READ_UNLOCK(inp); 4455 if (stcb->block_entry) { 4456 cnt++; 4457 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4458 stcb->block_entry->error = ECONNRESET; 4459 stcb->block_entry = NULL; 4460 } 4461 } 4462 if (stcb->asoc.refcnt) { 4463 /* 4464 * reader or writer in the way, we have hopefully given him 4465 * something to chew on above. 4466 */ 4467 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4468 SCTP_TCB_UNLOCK(stcb); 4469 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4470 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4471 /* nothing around */ 4472 so = NULL; 4473 if (so) { 4474 /* Wake any reader/writers */ 4475 sctp_sorwakeup(inp, so); 4476 sctp_sowwakeup(inp, so); 4477 } 4478 #ifdef SCTP_LOG_CLOSING 4479 sctp_log_closing(inp, stcb, 9); 4480 #endif 4481 /* no asoc destroyed */ 4482 return (0); 4483 } 4484 #ifdef SCTP_LOG_CLOSING 4485 sctp_log_closing(inp, stcb, 10); 4486 #endif 4487 /* 4488 * When I reach here, no others want to kill the assoc yet.. and I 4489 * own the lock. Now its possible an abort comes in when I do the 4490 * lock exchange below to grab all the locks to do the final take 4491 * out. to prevent this we increment the count, which will start a 4492 * timer and blow out above thus assuring us that we hold exclusive 4493 * killing of the asoc. Note that after getting back the TCB lock we 4494 * will go ahead and increment the counter back up and stop any 4495 * timer a passing stranger may have started :-S 4496 */ 4497 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4498 atomic_add_int(&stcb->asoc.refcnt, 1); 4499 4500 SCTP_TCB_UNLOCK(stcb); 4501 4502 SCTP_ITERATOR_LOCK(); 4503 SCTP_INP_INFO_WLOCK(); 4504 SCTP_INP_WLOCK(inp); 4505 SCTP_TCB_LOCK(stcb); 4506 } 4507 /* Double check the GONE flag */ 4508 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4509 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4510 /* nothing around */ 4511 so = NULL; 4512 4513 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4514 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4515 /* 4516 * For TCP type we need special handling when we are 4517 * connected. We also include the peel'ed off ones to. 4518 */ 4519 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4520 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4521 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4522 if (so) { 4523 SOCK_LOCK(so); 4524 if (so->so_rcv.sb_cc == 0) { 4525 so->so_state &= ~(SS_ISCONNECTING | 4526 SS_ISDISCONNECTING | 4527 SS_ISCONFIRMING | 4528 SS_ISCONNECTED); 4529 } 4530 SOCK_UNLOCK(so); 4531 socantrcvmore(so); 4532 sctp_sowwakeup(inp, so); 4533 sctp_sorwakeup(inp, so); 4534 SCTP_SOWAKEUP(so); 4535 } 4536 } 4537 } 4538 /* 4539 * Make it invalid too, that way if its about to run it will abort 4540 * and return. 4541 */ 4542 sctp_iterator_asoc_being_freed(inp, stcb); 4543 /* re-increment the lock */ 4544 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4545 atomic_add_int(&stcb->asoc.refcnt, -1); 4546 } 4547 asoc->state = 0; 4548 if (inp->sctp_tcbhash) { 4549 LIST_REMOVE(stcb, sctp_tcbhash); 4550 } 4551 if (stcb->asoc.in_restart_hash) { 4552 LIST_REMOVE(stcb, sctp_tcbrestarhash); 4553 } 4554 /* Now lets remove it from the list of ALL associations in the EP */ 4555 LIST_REMOVE(stcb, sctp_tcblist); 4556 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4557 SCTP_INP_INCR_REF(inp); 4558 SCTP_INP_WUNLOCK(inp); 4559 SCTP_ITERATOR_UNLOCK(); 4560 } 4561 /* pull from vtag hash */ 4562 LIST_REMOVE(stcb, sctp_asocs); 4563 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_TIME_WAIT); 4564 4565 /* 4566 * Now restop the timers to be sure - this is paranoia at is finest! 4567 */ 4568 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4569 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4570 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4571 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4572 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4573 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4574 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4575 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4576 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4577 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4578 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4579 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4580 } 4581 4582 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4583 prev = NULL; 4584 /* 4585 * The chunk lists and such SHOULD be empty but we check them just 4586 * in case. 4587 */ 4588 /* anything on the wheel needs to be removed */ 4589 for (i = 0; i < asoc->streamoutcnt; i++) { 4590 struct sctp_stream_out *outs; 4591 4592 outs = &asoc->strmout[i]; 4593 /* now clean up any chunks here */ 4594 sp = TAILQ_FIRST(&outs->outqueue); 4595 while (sp) { 4596 TAILQ_REMOVE(&outs->outqueue, sp, next); 4597 if (sp->data) { 4598 sctp_m_freem(sp->data); 4599 sp->data = NULL; 4600 sp->tail_mbuf = NULL; 4601 } 4602 sctp_free_remote_addr(sp->net); 4603 sctp_free_spbufspace(stcb, asoc, sp); 4604 /* Free the zone stuff */ 4605 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 4606 SCTP_DECR_STRMOQ_COUNT(); 4607 /* sa_ignore FREED_MEMORY */ 4608 sp = TAILQ_FIRST(&outs->outqueue); 4609 } 4610 } 4611 4612 /* sa_ignore FREED_MEMORY */ 4613 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { 4614 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); 4615 SCTP_FREE(liste, SCTP_M_STRESET); 4616 } 4617 4618 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 4619 while (sq) { 4620 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4621 if (sq->data) { 4622 sctp_m_freem(sq->data); 4623 sq->data = NULL; 4624 } 4625 sctp_free_remote_addr(sq->whoFrom); 4626 sq->whoFrom = NULL; 4627 sq->stcb = NULL; 4628 /* Free the ctl entry */ 4629 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4630 SCTP_DECR_READQ_COUNT(); 4631 /* sa_ignore FREED_MEMORY */ 4632 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 4633 } 4634 4635 chk = TAILQ_FIRST(&asoc->free_chunks); 4636 while (chk) { 4637 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4638 if (chk->data) { 4639 sctp_m_freem(chk->data); 4640 chk->data = NULL; 4641 } 4642 ccnt++; 4643 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4644 SCTP_DECR_CHK_COUNT(); 4645 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4646 asoc->free_chunk_cnt--; 4647 /* sa_ignore FREED_MEMORY */ 4648 chk = TAILQ_FIRST(&asoc->free_chunks); 4649 } 4650 /* pending send queue SHOULD be empty */ 4651 if (!TAILQ_EMPTY(&asoc->send_queue)) { 4652 chk = TAILQ_FIRST(&asoc->send_queue); 4653 while (chk) { 4654 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4655 if (chk->data) { 4656 sctp_m_freem(chk->data); 4657 chk->data = NULL; 4658 } 4659 ccnt++; 4660 sctp_free_remote_addr(chk->whoTo); 4661 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4662 SCTP_DECR_CHK_COUNT(); 4663 /* sa_ignore FREED_MEMORY */ 4664 chk = TAILQ_FIRST(&asoc->send_queue); 4665 } 4666 } 4667 /* 4668 if(ccnt) { 4669 printf("Freed %d from send_queue\n", ccnt); 4670 ccnt = 0; 4671 } 4672 */ 4673 /* sent queue SHOULD be empty */ 4674 if (!TAILQ_EMPTY(&asoc->sent_queue)) { 4675 chk = TAILQ_FIRST(&asoc->sent_queue); 4676 while (chk) { 4677 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4678 if (chk->data) { 4679 sctp_m_freem(chk->data); 4680 chk->data = NULL; 4681 } 4682 ccnt++; 4683 sctp_free_remote_addr(chk->whoTo); 4684 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4685 SCTP_DECR_CHK_COUNT(); 4686 /* sa_ignore FREED_MEMORY */ 4687 chk = TAILQ_FIRST(&asoc->sent_queue); 4688 } 4689 } 4690 /* 4691 if(ccnt) { 4692 printf("Freed %d from sent_queue\n", ccnt); 4693 ccnt = 0; 4694 } 4695 */ 4696 /* control queue MAY not be empty */ 4697 if (!TAILQ_EMPTY(&asoc->control_send_queue)) { 4698 chk = TAILQ_FIRST(&asoc->control_send_queue); 4699 while (chk) { 4700 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4701 if (chk->data) { 4702 sctp_m_freem(chk->data); 4703 chk->data = NULL; 4704 } 4705 ccnt++; 4706 sctp_free_remote_addr(chk->whoTo); 4707 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4708 SCTP_DECR_CHK_COUNT(); 4709 /* sa_ignore FREED_MEMORY */ 4710 chk = TAILQ_FIRST(&asoc->control_send_queue); 4711 } 4712 } 4713 /* 4714 if(ccnt) { 4715 printf("Freed %d from ctrl_queue\n", ccnt); 4716 ccnt = 0; 4717 } 4718 */ 4719 4720 /* ASCONF queue MAY not be empty */ 4721 if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) { 4722 chk = TAILQ_FIRST(&asoc->asconf_send_queue); 4723 while (chk) { 4724 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4725 if (chk->data) { 4726 sctp_m_freem(chk->data); 4727 chk->data = NULL; 4728 } 4729 ccnt++; 4730 sctp_free_remote_addr(chk->whoTo); 4731 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4732 SCTP_DECR_CHK_COUNT(); 4733 /* sa_ignore FREED_MEMORY */ 4734 chk = TAILQ_FIRST(&asoc->asconf_send_queue); 4735 } 4736 } 4737 /* 4738 if(ccnt) { 4739 printf("Freed %d from asconf_queue\n", ccnt); 4740 ccnt = 0; 4741 } 4742 */ 4743 if (!TAILQ_EMPTY(&asoc->reasmqueue)) { 4744 chk = TAILQ_FIRST(&asoc->reasmqueue); 4745 while (chk) { 4746 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4747 if (chk->data) { 4748 sctp_m_freem(chk->data); 4749 chk->data = NULL; 4750 } 4751 sctp_free_remote_addr(chk->whoTo); 4752 ccnt++; 4753 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4754 SCTP_DECR_CHK_COUNT(); 4755 /* sa_ignore FREED_MEMORY */ 4756 chk = TAILQ_FIRST(&asoc->reasmqueue); 4757 } 4758 } 4759 /* 4760 if(ccnt) { 4761 printf("Freed %d from reasm_queue\n", ccnt); 4762 ccnt = 0; 4763 } 4764 */ 4765 if (asoc->mapping_array) { 4766 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4767 asoc->mapping_array = NULL; 4768 } 4769 /* the stream outs */ 4770 if (asoc->strmout) { 4771 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4772 asoc->strmout = NULL; 4773 } 4774 asoc->streamoutcnt = 0; 4775 if (asoc->strmin) { 4776 struct sctp_queued_to_read *ctl; 4777 4778 for (i = 0; i < asoc->streamincnt; i++) { 4779 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { 4780 /* We have somethings on the streamin queue */ 4781 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4782 while (ctl) { 4783 TAILQ_REMOVE(&asoc->strmin[i].inqueue, 4784 ctl, next); 4785 sctp_free_remote_addr(ctl->whoFrom); 4786 if (ctl->data) { 4787 sctp_m_freem(ctl->data); 4788 ctl->data = NULL; 4789 } 4790 /* 4791 * We don't free the address here 4792 * since all the net's were freed 4793 * above. 4794 */ 4795 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 4796 SCTP_DECR_READQ_COUNT(); 4797 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4798 } 4799 } 4800 } 4801 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4802 asoc->strmin = NULL; 4803 } 4804 asoc->streamincnt = 0; 4805 while (!TAILQ_EMPTY(&asoc->nets)) { 4806 /* sa_ignore FREED_MEMORY */ 4807 net = TAILQ_FIRST(&asoc->nets); 4808 /* pull from list */ 4809 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) { 4810 #ifdef INVARIANTS 4811 panic("no net's left alloc'ed, or list points to itself"); 4812 #endif 4813 break; 4814 } 4815 prev = net; 4816 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4817 sctp_free_remote_addr(net); 4818 } 4819 4820 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) { 4821 /* sa_ignore FREED_MEMORY */ 4822 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); 4823 sctp_remove_laddr(laddr); 4824 } 4825 4826 /* pending asconf (address) parameters */ 4827 while (!TAILQ_EMPTY(&asoc->asconf_queue)) { 4828 /* sa_ignore FREED_MEMORY */ 4829 aparam = TAILQ_FIRST(&asoc->asconf_queue); 4830 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 4831 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 4832 } 4833 while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) { 4834 /* sa_ignore FREED_MEMORY */ 4835 aack = TAILQ_FIRST(&asoc->asconf_ack_sent); 4836 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 4837 if (aack->data != NULL) { 4838 sctp_m_freem(aack->data); 4839 } 4840 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 4841 } 4842 /* clean up auth stuff */ 4843 if (asoc->local_hmacs) 4844 sctp_free_hmaclist(asoc->local_hmacs); 4845 if (asoc->peer_hmacs) 4846 sctp_free_hmaclist(asoc->peer_hmacs); 4847 4848 if (asoc->local_auth_chunks) 4849 sctp_free_chunklist(asoc->local_auth_chunks); 4850 if (asoc->peer_auth_chunks) 4851 sctp_free_chunklist(asoc->peer_auth_chunks); 4852 4853 sctp_free_authinfo(&asoc->authinfo); 4854 4855 shared_key = LIST_FIRST(&asoc->shared_keys); 4856 while (shared_key) { 4857 LIST_REMOVE(shared_key, next); 4858 sctp_free_sharedkey(shared_key); 4859 /* sa_ignore FREED_MEMORY */ 4860 shared_key = LIST_FIRST(&asoc->shared_keys); 4861 } 4862 4863 /* Insert new items here :> */ 4864 4865 /* Get rid of LOCK */ 4866 SCTP_TCB_LOCK_DESTROY(stcb); 4867 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4868 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4869 SCTP_INP_INFO_WUNLOCK(); 4870 SCTP_INP_RLOCK(inp); 4871 } 4872 #ifdef SCTP_TRACK_FREED_ASOCS 4873 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4874 /* now clean up the tasoc itself */ 4875 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4876 SCTP_DECR_ASOC_COUNT(); 4877 } else { 4878 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 4879 } 4880 #else 4881 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4882 SCTP_DECR_ASOC_COUNT(); 4883 #endif 4884 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4885 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4886 /* 4887 * If its NOT the inp_free calling us AND sctp_close 4888 * as been called, we call back... 4889 */ 4890 SCTP_INP_RUNLOCK(inp); 4891 /* 4892 * This will start the kill timer (if we are the 4893 * lastone) since we hold an increment yet. But this 4894 * is the only safe way to do this since otherwise 4895 * if the socket closes at the same time we are here 4896 * we might collide in the cleanup. 4897 */ 4898 sctp_inpcb_free(inp, 4899 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 4900 SCTP_CALLED_DIRECTLY_NOCMPSET); 4901 SCTP_INP_DECR_REF(inp); 4902 goto out_of; 4903 } else { 4904 /* The socket is still open. */ 4905 SCTP_INP_DECR_REF(inp); 4906 } 4907 } 4908 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4909 SCTP_INP_RUNLOCK(inp); 4910 } 4911 out_of: 4912 /* destroyed the asoc */ 4913 #ifdef SCTP_LOG_CLOSING 4914 sctp_log_closing(inp, NULL, 11); 4915 #endif 4916 return (1); 4917 } 4918 4919 4920 4921 /* 4922 * determine if a destination is "reachable" based upon the addresses bound 4923 * to the current endpoint (e.g. only v4 or v6 currently bound) 4924 */ 4925 /* 4926 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 4927 * assoc level v4/v6 flags, as the assoc *may* not have the same address 4928 * types bound as its endpoint 4929 */ 4930 int 4931 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 4932 { 4933 struct sctp_inpcb *inp; 4934 int answer; 4935 4936 /* 4937 * No locks here, the TCB, in all cases is already locked and an 4938 * assoc is up. There is either a INP lock by the caller applied (in 4939 * asconf case when deleting an address) or NOT in the HB case, 4940 * however if HB then the INP increment is up and the INP will not 4941 * be removed (on top of the fact that we have a TCB lock). So we 4942 * only want to read the sctp_flags, which is either bound-all or 4943 * not.. no protection needed since once an assoc is up you can't be 4944 * changing your binding. 4945 */ 4946 inp = stcb->sctp_ep; 4947 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 4948 /* if bound all, destination is not restricted */ 4949 /* 4950 * RRS: Question during lock work: Is this correct? If you 4951 * are bound-all you still might need to obey the V4--V6 4952 * flags??? IMO this bound-all stuff needs to be removed! 4953 */ 4954 return (1); 4955 } 4956 /* NOTE: all "scope" checks are done when local addresses are added */ 4957 if (destaddr->sa_family == AF_INET6) { 4958 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 4959 } else if (destaddr->sa_family == AF_INET) { 4960 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 4961 } else { 4962 /* invalid family, so it's unreachable */ 4963 answer = 0; 4964 } 4965 return (answer); 4966 } 4967 4968 /* 4969 * update the inp_vflags on an endpoint 4970 */ 4971 static void 4972 sctp_update_ep_vflag(struct sctp_inpcb *inp) 4973 { 4974 struct sctp_laddr *laddr; 4975 4976 /* first clear the flag */ 4977 inp->ip_inp.inp.inp_vflag = 0; 4978 /* set the flag based on addresses on the ep list */ 4979 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 4980 if (laddr->ifa == NULL) { 4981 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 4982 __FUNCTION__); 4983 continue; 4984 } 4985 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 4986 continue; 4987 } 4988 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 4989 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 4990 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 4991 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 4992 } 4993 } 4994 } 4995 4996 /* 4997 * Add the address to the endpoint local address list There is nothing to be 4998 * done if we are bound to all addresses 4999 */ 5000 void 5001 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5002 { 5003 struct sctp_laddr *laddr; 5004 int fnd, error = 0; 5005 5006 fnd = 0; 5007 5008 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5009 /* You are already bound to all. You have it already */ 5010 return; 5011 } 5012 if (ifa->address.sa.sa_family == AF_INET6) { 5013 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5014 /* Can't bind a non-useable addr. */ 5015 return; 5016 } 5017 } 5018 /* first, is it already present? */ 5019 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5020 if (laddr->ifa == ifa) { 5021 fnd = 1; 5022 break; 5023 } 5024 } 5025 5026 if (fnd == 0) { 5027 /* Not in the ep list */ 5028 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5029 if (error != 0) 5030 return; 5031 inp->laddr_count++; 5032 /* update inp_vflag flags */ 5033 if (ifa->address.sa.sa_family == AF_INET6) { 5034 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5035 } else if (ifa->address.sa.sa_family == AF_INET) { 5036 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5037 } 5038 } 5039 return; 5040 } 5041 5042 5043 /* 5044 * select a new (hopefully reachable) destination net (should only be used 5045 * when we deleted an ep addr that is the only usable source address to reach 5046 * the destination net) 5047 */ 5048 static void 5049 sctp_select_primary_destination(struct sctp_tcb *stcb) 5050 { 5051 struct sctp_nets *net; 5052 5053 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5054 /* for now, we'll just pick the first reachable one we find */ 5055 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5056 continue; 5057 if (sctp_destination_is_reachable(stcb, 5058 (struct sockaddr *)&net->ro._l_addr)) { 5059 /* found a reachable destination */ 5060 stcb->asoc.primary_destination = net; 5061 } 5062 } 5063 /* I can't there from here! ...we're gonna die shortly... */ 5064 } 5065 5066 5067 /* 5068 * Delete the address from the endpoint local address list There is nothing 5069 * to be done if we are bound to all addresses 5070 */ 5071 void 5072 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5073 { 5074 struct sctp_laddr *laddr; 5075 int fnd; 5076 5077 fnd = 0; 5078 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5079 /* You are already bound to all. You have it already */ 5080 return; 5081 } 5082 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5083 if (laddr->ifa == ifa) { 5084 fnd = 1; 5085 break; 5086 } 5087 } 5088 if (fnd && (inp->laddr_count < 2)) { 5089 /* can't delete unless there are at LEAST 2 addresses */ 5090 return; 5091 } 5092 if (fnd) { 5093 /* 5094 * clean up any use of this address go through our 5095 * associations and clear any last_used_address that match 5096 * this one for each assoc, see if a new primary_destination 5097 * is needed 5098 */ 5099 struct sctp_tcb *stcb; 5100 5101 /* clean up "next_addr_touse" */ 5102 if (inp->next_addr_touse == laddr) 5103 /* delete this address */ 5104 inp->next_addr_touse = NULL; 5105 5106 /* clean up "last_used_address" */ 5107 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5108 struct sctp_nets *net; 5109 5110 SCTP_TCB_LOCK(stcb); 5111 if (stcb->asoc.last_used_address == laddr) 5112 /* delete this address */ 5113 stcb->asoc.last_used_address = NULL; 5114 /* 5115 * Now spin through all the nets and purge any ref 5116 * to laddr 5117 */ 5118 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5119 if (net->ro._s_addr && 5120 (net->ro._s_addr->ifa == laddr->ifa)) { 5121 /* Yep, purge src address selected */ 5122 sctp_rtentry_t *rt; 5123 5124 /* delete this address if cached */ 5125 rt = net->ro.ro_rt; 5126 if (rt != NULL) { 5127 RTFREE(rt); 5128 net->ro.ro_rt = NULL; 5129 } 5130 sctp_free_ifa(net->ro._s_addr); 5131 net->ro._s_addr = NULL; 5132 net->src_addr_selected = 0; 5133 } 5134 } 5135 SCTP_TCB_UNLOCK(stcb); 5136 } /* for each tcb */ 5137 /* remove it from the ep list */ 5138 sctp_remove_laddr(laddr); 5139 inp->laddr_count--; 5140 /* update inp_vflag flags */ 5141 sctp_update_ep_vflag(inp); 5142 } 5143 return; 5144 } 5145 5146 /* 5147 * Add the address to the TCB local address restricted list. 5148 * This is a "pending" address list (eg. addresses waiting for an 5149 * ASCONF-ACK response) and cannot be used as a valid source address. 5150 */ 5151 void 5152 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5153 { 5154 struct sctp_inpcb *inp; 5155 struct sctp_laddr *laddr; 5156 struct sctpladdr *list; 5157 5158 /* 5159 * Assumes TCB is locked.. and possibly the INP. May need to 5160 * confirm/fix that if we need it and is not the case. 5161 */ 5162 list = &stcb->asoc.sctp_restricted_addrs; 5163 5164 inp = stcb->sctp_ep; 5165 if (ifa->address.sa.sa_family == AF_INET6) { 5166 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5167 /* Can't bind a non-existent addr. */ 5168 return; 5169 } 5170 } 5171 /* does the address already exist? */ 5172 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5173 if (laddr->ifa == ifa) { 5174 return; 5175 } 5176 } 5177 5178 /* add to the list */ 5179 (void)sctp_insert_laddr(list, ifa, 0); 5180 return; 5181 } 5182 5183 /* 5184 * insert an laddr entry with the given ifa for the desired list 5185 */ 5186 int 5187 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5188 { 5189 struct sctp_laddr *laddr; 5190 5191 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5192 if (laddr == NULL) { 5193 /* out of memory? */ 5194 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5195 return (EINVAL); 5196 } 5197 SCTP_INCR_LADDR_COUNT(); 5198 bzero(laddr, sizeof(*laddr)); 5199 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5200 laddr->ifa = ifa; 5201 laddr->action = act; 5202 atomic_add_int(&ifa->refcount, 1); 5203 /* insert it */ 5204 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5205 5206 return (0); 5207 } 5208 5209 /* 5210 * Remove an laddr entry from the local address list (on an assoc) 5211 */ 5212 void 5213 sctp_remove_laddr(struct sctp_laddr *laddr) 5214 { 5215 5216 /* remove from the list */ 5217 LIST_REMOVE(laddr, sctp_nxt_addr); 5218 sctp_free_ifa(laddr->ifa); 5219 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5220 SCTP_DECR_LADDR_COUNT(); 5221 } 5222 5223 /* 5224 * Remove a local address from the TCB local address restricted list 5225 */ 5226 void 5227 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5228 { 5229 struct sctp_inpcb *inp; 5230 struct sctp_laddr *laddr; 5231 5232 /* 5233 * This is called by asconf work. It is assumed that a) The TCB is 5234 * locked and b) The INP is locked. This is true in as much as I can 5235 * trace through the entry asconf code where I did these locks. 5236 * Again, the ASCONF code is a bit different in that it does lock 5237 * the INP during its work often times. This must be since we don't 5238 * want other proc's looking up things while what they are looking 5239 * up is changing :-D 5240 */ 5241 5242 inp = stcb->sctp_ep; 5243 /* if subset bound and don't allow ASCONF's, can't delete last */ 5244 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5245 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5246 if (stcb->sctp_ep->laddr_count < 2) { 5247 /* can't delete last address */ 5248 return; 5249 } 5250 } 5251 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5252 /* remove the address if it exists */ 5253 if (laddr->ifa == NULL) 5254 continue; 5255 if (laddr->ifa == ifa) { 5256 sctp_remove_laddr(laddr); 5257 return; 5258 } 5259 } 5260 5261 /* address not found! */ 5262 return; 5263 } 5264 5265 /* 5266 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5267 */ 5268 /* sysctl */ 5269 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5270 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5271 5272 void 5273 sctp_pcb_init() 5274 { 5275 /* 5276 * SCTP initialization for the PCB structures should be called by 5277 * the sctp_init() funciton. 5278 */ 5279 int i; 5280 struct timeval tv; 5281 5282 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5283 /* error I was called twice */ 5284 return; 5285 } 5286 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5287 5288 #if defined(SCTP_LOCAL_TRACE_BUF) 5289 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5290 #endif 5291 (void)SCTP_GETTIME_TIMEVAL(&tv); 5292 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5293 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5294 /* init the empty list of (All) Endpoints */ 5295 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5296 5297 /* init the iterator head */ 5298 TAILQ_INIT(&SCTP_BASE_INFO(iteratorhead)); 5299 5300 /* init the hash table of endpoints */ 5301 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5302 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5303 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5304 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5305 &SCTP_BASE_INFO(hashasocmark)); 5306 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5307 &SCTP_BASE_INFO(hashmark)); 5308 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5309 &SCTP_BASE_INFO(hashtcpmark)); 5310 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5311 5312 /* init the small hash table we use to track restarted asoc's */ 5313 SCTP_BASE_INFO(sctp_restarthash) = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, 5314 &SCTP_BASE_INFO(hashrestartmark)); 5315 5316 5317 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5318 &SCTP_BASE_INFO(hashvrfmark)); 5319 5320 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5321 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5322 5323 /* init the zones */ 5324 /* 5325 * FIX ME: Should check for NULL returns, but if it does fail we are 5326 * doomed to panic anyways... add later maybe. 5327 */ 5328 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5329 sizeof(struct sctp_inpcb), maxsockets); 5330 5331 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5332 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5333 5334 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5335 sizeof(struct sctp_laddr), 5336 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5337 5338 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5339 sizeof(struct sctp_nets), 5340 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5341 5342 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5343 sizeof(struct sctp_tmit_chunk), 5344 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5345 5346 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5347 sizeof(struct sctp_queued_to_read), 5348 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5349 5350 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5351 sizeof(struct sctp_stream_queue_pending), 5352 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5353 5354 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5355 sizeof(struct sctp_asconf), 5356 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5357 5358 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5359 sizeof(struct sctp_asconf_ack), 5360 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5361 5362 5363 /* Master Lock INIT for info structure */ 5364 SCTP_INP_INFO_LOCK_INIT(); 5365 SCTP_STATLOG_INIT_LOCK(); 5366 SCTP_ITERATOR_LOCK_INIT(); 5367 5368 SCTP_IPI_COUNT_INIT(); 5369 SCTP_IPI_ADDR_INIT(); 5370 SCTP_IPI_ITERATOR_WQ_INIT(); 5371 #ifdef SCTP_PACKET_LOGGING 5372 SCTP_IP_PKTLOG_INIT(); 5373 #endif 5374 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5375 5376 /* not sure if we need all the counts */ 5377 SCTP_BASE_INFO(ipi_count_ep) = 0; 5378 /* assoc/tcb zone info */ 5379 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5380 /* local addrlist zone info */ 5381 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5382 /* remote addrlist zone info */ 5383 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5384 /* chunk info */ 5385 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5386 5387 /* socket queue zone info */ 5388 SCTP_BASE_INFO(ipi_count_readq) = 0; 5389 5390 /* stream out queue cont */ 5391 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5392 5393 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5394 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5395 5396 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5397 5398 /* Init the TIMEWAIT list */ 5399 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) { 5400 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait[i])); 5401 } 5402 5403 #if defined(SCTP_USE_THREAD_BASED_ITERATOR) 5404 SCTP_BASE_INFO(iterator_running) = 0; 5405 SCTP_BASE_INFO(threads_must_exit) = 0; 5406 sctp_startup_iterator(); 5407 #endif 5408 5409 /* 5410 * INIT the default VRF which for BSD is the only one, other O/S's 5411 * may have more. But initially they must start with one and then 5412 * add the VRF's as addresses are added. 5413 */ 5414 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5415 5416 } 5417 5418 /* 5419 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5420 */ 5421 void 5422 sctp_pcb_finish(void) 5423 { 5424 struct sctp_vrflist *vrf_bucket; 5425 struct sctp_vrf *vrf; 5426 struct sctp_ifn *ifn; 5427 struct sctp_ifa *ifa; 5428 struct sctpvtaghead *chain; 5429 struct sctp_tagblock *twait_block, *prev_twait_block; 5430 int i; 5431 5432 /* 5433 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5434 * destroyed first). 5435 */ 5436 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5437 vrf = LIST_FIRST(vrf_bucket); 5438 while (vrf) { 5439 ifn = LIST_FIRST(&vrf->ifnlist); 5440 while (ifn) { 5441 ifa = LIST_FIRST(&ifn->ifalist); 5442 while (ifa) { 5443 /* free the ifa */ 5444 LIST_REMOVE(ifa, next_bucket); 5445 LIST_REMOVE(ifa, next_ifa); 5446 SCTP_FREE(ifa, SCTP_M_IFA); 5447 ifa = LIST_FIRST(&ifn->ifalist); 5448 } 5449 /* free the ifn */ 5450 LIST_REMOVE(ifn, next_bucket); 5451 LIST_REMOVE(ifn, next_ifn); 5452 SCTP_FREE(ifn, SCTP_M_IFN); 5453 ifn = LIST_FIRST(&vrf->ifnlist); 5454 } 5455 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5456 /* free the vrf */ 5457 LIST_REMOVE(vrf, next_vrf); 5458 SCTP_FREE(vrf, SCTP_M_VRF); 5459 vrf = LIST_FIRST(vrf_bucket); 5460 } 5461 /* free the vrf hashes */ 5462 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5463 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5464 5465 /* 5466 * free the TIMEWAIT list elements malloc'd in the function 5467 * sctp_add_vtag_to_timewait()... 5468 */ 5469 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE_A; i++) { 5470 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5471 if (!SCTP_LIST_EMPTY(chain)) { 5472 prev_twait_block = NULL; 5473 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5474 if (prev_twait_block) { 5475 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5476 } 5477 prev_twait_block = twait_block; 5478 } 5479 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5480 } 5481 } 5482 5483 /* free the locks and mutexes */ 5484 #ifdef SCTP_PACKET_LOGGING 5485 SCTP_IP_PKTLOG_DESTROY(); 5486 5487 #endif 5488 SCTP_IPI_ITERATOR_WQ_DESTROY(); 5489 SCTP_IPI_ADDR_DESTROY(); 5490 SCTP_ITERATOR_LOCK_DESTROY(); 5491 SCTP_STATLOG_DESTROY(); 5492 SCTP_INP_INFO_LOCK_DESTROY(); 5493 5494 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5495 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5496 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5497 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5498 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5499 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5500 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5501 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5502 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5503 /* Get rid of other stuff to */ 5504 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5505 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5506 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5507 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5508 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5509 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5510 if (SCTP_BASE_INFO(sctp_restarthash) != NULL) 5511 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_restarthash), SCTP_BASE_INFO(hashrestartmark)); 5512 5513 } 5514 5515 5516 int 5517 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5518 int iphlen, int offset, int limit, struct sctphdr *sh, 5519 struct sockaddr *altsa) 5520 { 5521 /* 5522 * grub through the INIT pulling addresses and loading them to the 5523 * nets structure in the asoc. The from address in the mbuf should 5524 * also be loaded (if it is not already). This routine can be called 5525 * with either INIT or INIT-ACK's as long as the m points to the IP 5526 * packet and the offset points to the beginning of the parameters. 5527 */ 5528 struct sctp_inpcb *inp, *l_inp; 5529 struct sctp_nets *net, *net_tmp; 5530 struct ip *iph; 5531 struct sctp_paramhdr *phdr, parm_buf; 5532 struct sctp_tcb *stcb_tmp; 5533 uint16_t ptype, plen; 5534 struct sockaddr *sa; 5535 struct sockaddr_storage dest_store; 5536 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 5537 struct sockaddr_in sin; 5538 struct sockaddr_in6 sin6; 5539 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5540 struct sctp_auth_random *p_random = NULL; 5541 uint16_t random_len = 0; 5542 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5543 struct sctp_auth_hmac_algo *hmacs = NULL; 5544 uint16_t hmacs_len = 0; 5545 uint8_t saw_asconf = 0; 5546 uint8_t saw_asconf_ack = 0; 5547 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 5548 struct sctp_auth_chunk_list *chunks = NULL; 5549 uint16_t num_chunks = 0; 5550 sctp_key_t *new_key; 5551 uint32_t keylen; 5552 int got_random = 0, got_hmacs = 0, got_chklist = 0; 5553 5554 /* First get the destination address setup too. */ 5555 memset(&sin, 0, sizeof(sin)); 5556 memset(&sin6, 0, sizeof(sin6)); 5557 5558 sin.sin_family = AF_INET; 5559 sin.sin_len = sizeof(sin); 5560 sin.sin_port = stcb->rport; 5561 5562 sin6.sin6_family = AF_INET6; 5563 sin6.sin6_len = sizeof(struct sockaddr_in6); 5564 sin6.sin6_port = stcb->rport; 5565 if (altsa == NULL) { 5566 iph = mtod(m, struct ip *); 5567 switch (iph->ip_v) { 5568 case IPVERSION: 5569 { 5570 /* its IPv4 */ 5571 struct sockaddr_in *sin_2; 5572 5573 sin_2 = (struct sockaddr_in *)(local_sa); 5574 memset(sin_2, 0, sizeof(sin)); 5575 sin_2->sin_family = AF_INET; 5576 sin_2->sin_len = sizeof(sin); 5577 sin_2->sin_port = sh->dest_port; 5578 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 5579 sin.sin_addr = iph->ip_src; 5580 sa = (struct sockaddr *)&sin; 5581 break; 5582 } 5583 #ifdef INET6 5584 case IPV6_VERSION >> 4: 5585 { 5586 /* its IPv6 */ 5587 struct ip6_hdr *ip6; 5588 struct sockaddr_in6 *sin6_2; 5589 5590 ip6 = mtod(m, struct ip6_hdr *); 5591 sin6_2 = (struct sockaddr_in6 *)(local_sa); 5592 memset(sin6_2, 0, sizeof(sin6)); 5593 sin6_2->sin6_family = AF_INET6; 5594 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 5595 sin6_2->sin6_port = sh->dest_port; 5596 sin6.sin6_addr = ip6->ip6_src; 5597 sa = (struct sockaddr *)&sin6; 5598 break; 5599 } 5600 #endif 5601 default: 5602 sa = NULL; 5603 break; 5604 } 5605 } else { 5606 /* 5607 * For cookies we use the src address NOT from the packet 5608 * but from the original INIT 5609 */ 5610 sa = altsa; 5611 } 5612 /* Turn off ECN until we get through all params */ 5613 stcb->asoc.ecn_allowed = 0; 5614 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5615 /* mark all addresses that we have currently on the list */ 5616 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 5617 } 5618 /* does the source address already exist? if so skip it */ 5619 l_inp = inp = stcb->sctp_ep; 5620 5621 atomic_add_int(&stcb->asoc.refcnt, 1); 5622 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 5623 atomic_add_int(&stcb->asoc.refcnt, -1); 5624 5625 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 5626 /* we must add the source address */ 5627 /* no scope set here since we have a tcb already. */ 5628 if ((sa->sa_family == AF_INET) && 5629 (stcb->asoc.ipv4_addr_legal)) { 5630 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 5631 return (-1); 5632 } 5633 } else if ((sa->sa_family == AF_INET6) && 5634 (stcb->asoc.ipv6_addr_legal)) { 5635 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 5636 return (-2); 5637 } 5638 } 5639 } else { 5640 if (net_tmp != NULL && stcb_tmp == stcb) { 5641 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 5642 } else if (stcb_tmp != stcb) { 5643 /* It belongs to another association? */ 5644 if (stcb_tmp) 5645 SCTP_TCB_UNLOCK(stcb_tmp); 5646 return (-3); 5647 } 5648 } 5649 if (stcb->asoc.state == 0) { 5650 /* the assoc was freed? */ 5651 return (-4); 5652 } 5653 /* 5654 * peer must explicitly turn this on. This may have been initialized 5655 * to be "on" in order to allow local addr changes while INIT's are 5656 * in flight. 5657 */ 5658 stcb->asoc.peer_supports_asconf = 0; 5659 /* now we must go through each of the params. */ 5660 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 5661 while (phdr) { 5662 ptype = ntohs(phdr->param_type); 5663 plen = ntohs(phdr->param_length); 5664 /* 5665 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 5666 * (int)plen); 5667 */ 5668 if (offset + plen > limit) { 5669 break; 5670 } 5671 if (plen == 0) { 5672 break; 5673 } 5674 if (ptype == SCTP_IPV4_ADDRESS) { 5675 if (stcb->asoc.ipv4_addr_legal) { 5676 struct sctp_ipv4addr_param *p4, p4_buf; 5677 5678 /* ok get the v4 address and check/add */ 5679 phdr = sctp_get_next_param(m, offset, 5680 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 5681 if (plen != sizeof(struct sctp_ipv4addr_param) || 5682 phdr == NULL) { 5683 return (-5); 5684 } 5685 p4 = (struct sctp_ipv4addr_param *)phdr; 5686 sin.sin_addr.s_addr = p4->addr; 5687 if (IN_MULTICAST(sin.sin_addr.s_addr)) { 5688 /* Skip multi-cast addresses */ 5689 goto next_param; 5690 } 5691 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 5692 (sin.sin_addr.s_addr == INADDR_ANY)) { 5693 goto next_param; 5694 } 5695 sa = (struct sockaddr *)&sin; 5696 inp = stcb->sctp_ep; 5697 atomic_add_int(&stcb->asoc.refcnt, 1); 5698 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5699 local_sa, stcb); 5700 atomic_add_int(&stcb->asoc.refcnt, -1); 5701 5702 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 5703 inp == NULL) { 5704 /* we must add the source address */ 5705 /* 5706 * no scope set since we have a tcb 5707 * already 5708 */ 5709 5710 /* 5711 * we must validate the state again 5712 * here 5713 */ 5714 add_it_now: 5715 if (stcb->asoc.state == 0) { 5716 /* the assoc was freed? */ 5717 return (-7); 5718 } 5719 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 5720 return (-8); 5721 } 5722 } else if (stcb_tmp == stcb) { 5723 if (stcb->asoc.state == 0) { 5724 /* the assoc was freed? */ 5725 return (-10); 5726 } 5727 if (net != NULL) { 5728 /* clear flag */ 5729 net->dest_state &= 5730 ~SCTP_ADDR_NOT_IN_ASSOC; 5731 } 5732 } else { 5733 /* 5734 * strange, address is in another 5735 * assoc? straighten out locks. 5736 */ 5737 if (stcb_tmp) { 5738 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 5739 /* 5740 * in setup state we 5741 * abort this guy 5742 */ 5743 sctp_abort_an_association(stcb_tmp->sctp_ep, 5744 stcb_tmp, 1, NULL, 0); 5745 goto add_it_now; 5746 } 5747 SCTP_TCB_UNLOCK(stcb_tmp); 5748 } 5749 if (stcb->asoc.state == 0) { 5750 /* the assoc was freed? */ 5751 return (-12); 5752 } 5753 return (-13); 5754 } 5755 } 5756 } else if (ptype == SCTP_IPV6_ADDRESS) { 5757 if (stcb->asoc.ipv6_addr_legal) { 5758 /* ok get the v6 address and check/add */ 5759 struct sctp_ipv6addr_param *p6, p6_buf; 5760 5761 phdr = sctp_get_next_param(m, offset, 5762 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 5763 if (plen != sizeof(struct sctp_ipv6addr_param) || 5764 phdr == NULL) { 5765 return (-14); 5766 } 5767 p6 = (struct sctp_ipv6addr_param *)phdr; 5768 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 5769 sizeof(p6->addr)); 5770 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 5771 /* Skip multi-cast addresses */ 5772 goto next_param; 5773 } 5774 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 5775 /* 5776 * Link local make no sense without 5777 * scope 5778 */ 5779 goto next_param; 5780 } 5781 sa = (struct sockaddr *)&sin6; 5782 inp = stcb->sctp_ep; 5783 atomic_add_int(&stcb->asoc.refcnt, 1); 5784 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5785 local_sa, stcb); 5786 atomic_add_int(&stcb->asoc.refcnt, -1); 5787 if (stcb_tmp == NULL && (inp == stcb->sctp_ep || 5788 inp == NULL)) { 5789 /* 5790 * we must validate the state again 5791 * here 5792 */ 5793 add_it_now6: 5794 if (stcb->asoc.state == 0) { 5795 /* the assoc was freed? */ 5796 return (-16); 5797 } 5798 /* 5799 * we must add the address, no scope 5800 * set 5801 */ 5802 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 5803 return (-17); 5804 } 5805 } else if (stcb_tmp == stcb) { 5806 /* 5807 * we must validate the state again 5808 * here 5809 */ 5810 if (stcb->asoc.state == 0) { 5811 /* the assoc was freed? */ 5812 return (-19); 5813 } 5814 if (net != NULL) { 5815 /* clear flag */ 5816 net->dest_state &= 5817 ~SCTP_ADDR_NOT_IN_ASSOC; 5818 } 5819 } else { 5820 /* 5821 * strange, address is in another 5822 * assoc? straighten out locks. 5823 */ 5824 if (stcb_tmp) 5825 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 5826 /* 5827 * in setup state we 5828 * abort this guy 5829 */ 5830 sctp_abort_an_association(stcb_tmp->sctp_ep, 5831 stcb_tmp, 1, NULL, 0); 5832 goto add_it_now6; 5833 } 5834 SCTP_TCB_UNLOCK(stcb_tmp); 5835 5836 if (stcb->asoc.state == 0) { 5837 /* the assoc was freed? */ 5838 return (-21); 5839 } 5840 return (-22); 5841 } 5842 } 5843 } else if (ptype == SCTP_ECN_CAPABLE) { 5844 stcb->asoc.ecn_allowed = 1; 5845 } else if (ptype == SCTP_ULP_ADAPTATION) { 5846 if (stcb->asoc.state != SCTP_STATE_OPEN) { 5847 struct sctp_adaptation_layer_indication ai, 5848 *aip; 5849 5850 phdr = sctp_get_next_param(m, offset, 5851 (struct sctp_paramhdr *)&ai, sizeof(ai)); 5852 aip = (struct sctp_adaptation_layer_indication *)phdr; 5853 if (aip) { 5854 stcb->asoc.peers_adaptation = ntohl(aip->indication); 5855 stcb->asoc.adaptation_needed = 1; 5856 } 5857 } 5858 } else if (ptype == SCTP_SET_PRIM_ADDR) { 5859 struct sctp_asconf_addr_param lstore, *fee; 5860 struct sctp_asconf_addrv4_param *fii; 5861 int lptype; 5862 struct sockaddr *lsa = NULL; 5863 5864 stcb->asoc.peer_supports_asconf = 1; 5865 if (plen > sizeof(lstore)) { 5866 return (-23); 5867 } 5868 phdr = sctp_get_next_param(m, offset, 5869 (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore))); 5870 if (phdr == NULL) { 5871 return (-24); 5872 } 5873 fee = (struct sctp_asconf_addr_param *)phdr; 5874 lptype = ntohs(fee->addrp.ph.param_type); 5875 if (lptype == SCTP_IPV4_ADDRESS) { 5876 if (plen != 5877 sizeof(struct sctp_asconf_addrv4_param)) { 5878 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 5879 (int)sizeof(struct sctp_asconf_addrv4_param), 5880 plen); 5881 } else { 5882 fii = (struct sctp_asconf_addrv4_param *)fee; 5883 sin.sin_addr.s_addr = fii->addrp.addr; 5884 lsa = (struct sockaddr *)&sin; 5885 } 5886 } else if (lptype == SCTP_IPV6_ADDRESS) { 5887 if (plen != 5888 sizeof(struct sctp_asconf_addr_param)) { 5889 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 5890 (int)sizeof(struct sctp_asconf_addr_param), 5891 plen); 5892 } else { 5893 memcpy(sin6.sin6_addr.s6_addr, 5894 fee->addrp.addr, 5895 sizeof(fee->addrp.addr)); 5896 lsa = (struct sockaddr *)&sin6; 5897 } 5898 } 5899 if (lsa) { 5900 (void)sctp_set_primary_addr(stcb, sa, NULL); 5901 } 5902 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 5903 /* Peer supports pr-sctp */ 5904 stcb->asoc.peer_supports_prsctp = 1; 5905 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 5906 /* A supported extension chunk */ 5907 struct sctp_supported_chunk_types_param *pr_supported; 5908 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 5909 int num_ent, i; 5910 5911 phdr = sctp_get_next_param(m, offset, 5912 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 5913 if (phdr == NULL) { 5914 return (-25); 5915 } 5916 stcb->asoc.peer_supports_asconf = 0; 5917 stcb->asoc.peer_supports_prsctp = 0; 5918 stcb->asoc.peer_supports_pktdrop = 0; 5919 stcb->asoc.peer_supports_strreset = 0; 5920 stcb->asoc.peer_supports_auth = 0; 5921 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 5922 num_ent = plen - sizeof(struct sctp_paramhdr); 5923 for (i = 0; i < num_ent; i++) { 5924 switch (pr_supported->chunk_types[i]) { 5925 case SCTP_ASCONF: 5926 case SCTP_ASCONF_ACK: 5927 stcb->asoc.peer_supports_asconf = 1; 5928 break; 5929 case SCTP_FORWARD_CUM_TSN: 5930 stcb->asoc.peer_supports_prsctp = 1; 5931 break; 5932 case SCTP_PACKET_DROPPED: 5933 stcb->asoc.peer_supports_pktdrop = 1; 5934 break; 5935 case SCTP_STREAM_RESET: 5936 stcb->asoc.peer_supports_strreset = 1; 5937 break; 5938 case SCTP_AUTHENTICATION: 5939 stcb->asoc.peer_supports_auth = 1; 5940 break; 5941 default: 5942 /* one I have not learned yet */ 5943 break; 5944 5945 } 5946 } 5947 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 5948 /* Peer supports ECN-nonce */ 5949 stcb->asoc.peer_supports_ecn_nonce = 1; 5950 stcb->asoc.ecn_nonce_allowed = 1; 5951 } else if (ptype == SCTP_RANDOM) { 5952 if (plen > sizeof(random_store)) 5953 break; 5954 if (got_random) { 5955 /* already processed a RANDOM */ 5956 goto next_param; 5957 } 5958 phdr = sctp_get_next_param(m, offset, 5959 (struct sctp_paramhdr *)random_store, 5960 min(sizeof(random_store), plen)); 5961 if (phdr == NULL) 5962 return (-26); 5963 p_random = (struct sctp_auth_random *)phdr; 5964 random_len = plen - sizeof(*p_random); 5965 /* enforce the random length */ 5966 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 5967 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 5968 return (-27); 5969 } 5970 got_random = 1; 5971 } else if (ptype == SCTP_HMAC_LIST) { 5972 int num_hmacs; 5973 int i; 5974 5975 if (plen > sizeof(hmacs_store)) 5976 break; 5977 if (got_hmacs) { 5978 /* already processed a HMAC list */ 5979 goto next_param; 5980 } 5981 phdr = sctp_get_next_param(m, offset, 5982 (struct sctp_paramhdr *)hmacs_store, 5983 min(plen, sizeof(hmacs_store))); 5984 if (phdr == NULL) 5985 return (-28); 5986 hmacs = (struct sctp_auth_hmac_algo *)phdr; 5987 hmacs_len = plen - sizeof(*hmacs); 5988 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 5989 /* validate the hmac list */ 5990 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 5991 return (-29); 5992 } 5993 if (stcb->asoc.peer_hmacs != NULL) 5994 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 5995 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 5996 if (stcb->asoc.peer_hmacs != NULL) { 5997 for (i = 0; i < num_hmacs; i++) { 5998 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 5999 ntohs(hmacs->hmac_ids[i])); 6000 } 6001 } 6002 got_hmacs = 1; 6003 } else if (ptype == SCTP_CHUNK_LIST) { 6004 int i; 6005 6006 if (plen > sizeof(chunks_store)) 6007 break; 6008 if (got_chklist) { 6009 /* already processed a Chunks list */ 6010 goto next_param; 6011 } 6012 phdr = sctp_get_next_param(m, offset, 6013 (struct sctp_paramhdr *)chunks_store, 6014 min(plen, sizeof(chunks_store))); 6015 if (phdr == NULL) 6016 return (-30); 6017 chunks = (struct sctp_auth_chunk_list *)phdr; 6018 num_chunks = plen - sizeof(*chunks); 6019 if (stcb->asoc.peer_auth_chunks != NULL) 6020 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6021 else 6022 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6023 for (i = 0; i < num_chunks; i++) { 6024 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6025 stcb->asoc.peer_auth_chunks); 6026 /* record asconf/asconf-ack if listed */ 6027 if (chunks->chunk_types[i] == SCTP_ASCONF) 6028 saw_asconf = 1; 6029 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6030 saw_asconf_ack = 1; 6031 6032 } 6033 got_chklist = 1; 6034 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6035 (ptype == SCTP_STATE_COOKIE) || 6036 (ptype == SCTP_UNRECOG_PARAM) || 6037 (ptype == SCTP_COOKIE_PRESERVE) || 6038 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6039 (ptype == SCTP_ADD_IP_ADDRESS) || 6040 (ptype == SCTP_DEL_IP_ADDRESS) || 6041 (ptype == SCTP_ERROR_CAUSE_IND) || 6042 (ptype == SCTP_SUCCESS_REPORT)) { 6043 /* don't care */ ; 6044 } else { 6045 if ((ptype & 0x8000) == 0x0000) { 6046 /* 6047 * must stop processing the rest of the 6048 * param's. Any report bits were handled 6049 * with the call to 6050 * sctp_arethere_unrecognized_parameters() 6051 * when the INIT or INIT-ACK was first seen. 6052 */ 6053 break; 6054 } 6055 } 6056 next_param: 6057 offset += SCTP_SIZE32(plen); 6058 if (offset >= limit) { 6059 break; 6060 } 6061 phdr = sctp_get_next_param(m, offset, &parm_buf, 6062 sizeof(parm_buf)); 6063 } 6064 /* Now check to see if we need to purge any addresses */ 6065 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { 6066 net_tmp = TAILQ_NEXT(net, sctp_next); 6067 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6068 SCTP_ADDR_NOT_IN_ASSOC) { 6069 /* This address has been removed from the asoc */ 6070 /* remove and free it */ 6071 stcb->asoc.numnets--; 6072 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6073 sctp_free_remote_addr(net); 6074 if (net == stcb->asoc.primary_destination) { 6075 stcb->asoc.primary_destination = NULL; 6076 sctp_select_primary_destination(stcb); 6077 } 6078 } 6079 } 6080 /* validate authentication required parameters */ 6081 if (got_random && got_hmacs) { 6082 stcb->asoc.peer_supports_auth = 1; 6083 } else { 6084 stcb->asoc.peer_supports_auth = 0; 6085 } 6086 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6087 /* peer does not support auth but sent a chunks list? */ 6088 return (-31); 6089 } 6090 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6091 !stcb->asoc.peer_supports_auth) { 6092 /* peer supports asconf but not auth? */ 6093 return (-32); 6094 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6095 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6096 return (-33); 6097 } 6098 /* concatenate the full random key */ 6099 #ifdef SCTP_AUTH_DRAFT_04 6100 keylen = random_len; 6101 new_key = sctp_alloc_key(keylen); 6102 if (new_key != NULL) { 6103 /* copy in the RANDOM */ 6104 if (p_random != NULL) 6105 bcopy(p_random->random_data, new_key->key, random_len); 6106 } 6107 #else 6108 keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks + 6109 sizeof(*hmacs) + hmacs_len; 6110 new_key = sctp_alloc_key(keylen); 6111 if (new_key != NULL) { 6112 /* copy in the RANDOM */ 6113 if (p_random != NULL) { 6114 keylen = sizeof(*p_random) + random_len; 6115 bcopy(p_random, new_key->key, keylen); 6116 } 6117 /* append in the AUTH chunks */ 6118 if (chunks != NULL) { 6119 bcopy(chunks, new_key->key + keylen, 6120 sizeof(*chunks) + num_chunks); 6121 keylen += sizeof(*chunks) + num_chunks; 6122 } 6123 /* append in the HMACs */ 6124 if (hmacs != NULL) { 6125 bcopy(hmacs, new_key->key + keylen, 6126 sizeof(*hmacs) + hmacs_len); 6127 } 6128 } 6129 #endif 6130 else { 6131 /* failed to get memory for the key */ 6132 return (-34); 6133 } 6134 if (stcb->asoc.authinfo.peer_random != NULL) 6135 sctp_free_key(stcb->asoc.authinfo.peer_random); 6136 stcb->asoc.authinfo.peer_random = new_key; 6137 #ifdef SCTP_AUTH_DRAFT_04 6138 /* don't include the chunks and hmacs for draft -04 */ 6139 stcb->asoc.authinfo.peer_random->keylen = random_len; 6140 #endif 6141 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6142 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6143 6144 return (0); 6145 } 6146 6147 int 6148 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6149 struct sctp_nets *net) 6150 { 6151 /* make sure the requested primary address exists in the assoc */ 6152 if (net == NULL && sa) 6153 net = sctp_findnet(stcb, sa); 6154 6155 if (net == NULL) { 6156 /* didn't find the requested primary address! */ 6157 return (-1); 6158 } else { 6159 /* set the primary address */ 6160 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6161 /* Must be confirmed, so queue to set */ 6162 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6163 return (0); 6164 } 6165 stcb->asoc.primary_destination = net; 6166 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 6167 net = TAILQ_FIRST(&stcb->asoc.nets); 6168 if (net != stcb->asoc.primary_destination) { 6169 /* 6170 * first one on the list is NOT the primary 6171 * sctp_cmpaddr() is much more efficent if the 6172 * primary is the first on the list, make it so. 6173 */ 6174 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6175 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6176 } 6177 return (0); 6178 } 6179 } 6180 6181 int 6182 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, struct timeval *now, int save_in_twait) 6183 { 6184 /* 6185 * This function serves two purposes. It will see if a TAG can be 6186 * re-used and return 1 for yes it is ok and 0 for don't use that 6187 * tag. A secondary function it will do is purge out old tags that 6188 * can be removed. 6189 */ 6190 struct sctpasochead *head; 6191 struct sctpvtaghead *chain; 6192 struct sctp_tagblock *twait_block; 6193 struct sctp_tcb *stcb; 6194 int i; 6195 6196 SCTP_INP_INFO_WLOCK(); 6197 chain = &SCTP_BASE_INFO(vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE))]; 6198 /* First is the vtag in use ? */ 6199 6200 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6201 SCTP_BASE_INFO(hashasocmark))]; 6202 if (head == NULL) { 6203 goto check_restart; 6204 } 6205 LIST_FOREACH(stcb, head, sctp_asocs) { 6206 6207 if (stcb->asoc.my_vtag == tag) { 6208 /* 6209 * We should remove this if and return 0 always if 6210 * we want vtags unique across all endpoints. For 6211 * now within a endpoint is ok. 6212 */ 6213 if (inp == stcb->sctp_ep) { 6214 /* bad tag, in use */ 6215 SCTP_INP_INFO_WUNLOCK(); 6216 return (0); 6217 } 6218 } 6219 } 6220 check_restart: 6221 /* Now lets check the restart hash */ 6222 head = &SCTP_BASE_INFO(sctp_restarthash)[SCTP_PCBHASH_ASOC(tag, 6223 SCTP_BASE_INFO(hashrestartmark))]; 6224 if (head == NULL) { 6225 goto check_time_wait; 6226 } 6227 LIST_FOREACH(stcb, head, sctp_tcbrestarhash) { 6228 if (stcb->asoc.assoc_id == tag) { 6229 /* candidate */ 6230 if (inp == stcb->sctp_ep) { 6231 /* bad tag, in use */ 6232 SCTP_INP_INFO_WUNLOCK(); 6233 return (0); 6234 } 6235 } 6236 } 6237 check_time_wait: 6238 /* Now what about timed wait ? */ 6239 if (!SCTP_LIST_EMPTY(chain)) { 6240 /* 6241 * Block(s) are present, lets see if we have this tag in the 6242 * list 6243 */ 6244 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6245 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6246 if (twait_block->vtag_block[i].v_tag == 0) { 6247 /* not used */ 6248 continue; 6249 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6250 now->tv_sec) { 6251 /* Audit expires this guy */ 6252 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6253 twait_block->vtag_block[i].v_tag = 0; 6254 } else if (twait_block->vtag_block[i].v_tag == 6255 tag) { 6256 /* Bad tag, sorry :< */ 6257 SCTP_INP_INFO_WUNLOCK(); 6258 return (0); 6259 } 6260 } 6261 } 6262 } 6263 /*- 6264 * Not found, ok to use the tag, add it to the time wait hash 6265 * as well this will prevent two sucessive cookies from getting 6266 * the same tag or two inits sent quickly on multi-processors. 6267 * We only keep the tag for the life of a cookie and when we 6268 * add this tag to the assoc hash we need to purge it from 6269 * the t-wait hash. 6270 */ 6271 if (save_in_twait) 6272 sctp_add_vtag_to_timewait(tag, TICKS_TO_SEC(inp->sctp_ep.def_cookie_life)); 6273 SCTP_INP_INFO_WUNLOCK(); 6274 return (1); 6275 } 6276 6277 6278 static sctp_assoc_t reneged_asoc_ids[256]; 6279 static uint8_t reneged_at = 0; 6280 6281 6282 static void 6283 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6284 { 6285 /* 6286 * We must hunt this association for MBUF's past the cumack (i.e. 6287 * out of order data that we can renege on). 6288 */ 6289 struct sctp_association *asoc; 6290 struct sctp_tmit_chunk *chk, *nchk; 6291 uint32_t cumulative_tsn_p1, tsn; 6292 struct sctp_queued_to_read *ctl, *nctl; 6293 int cnt, strmat, gap; 6294 6295 /* We look for anything larger than the cum-ack + 1 */ 6296 6297 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6298 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6299 return; 6300 } 6301 asoc = &stcb->asoc; 6302 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6303 /* none we can reneg on. */ 6304 return; 6305 } 6306 SCTP_STAT_INCR(sctps_protocol_drains_done); 6307 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6308 cnt = 0; 6309 /* First look in the re-assembly queue */ 6310 chk = TAILQ_FIRST(&asoc->reasmqueue); 6311 while (chk) { 6312 /* Get the next one */ 6313 nchk = TAILQ_NEXT(chk, sctp_next); 6314 if (compare_with_wrap(chk->rec.data.TSN_seq, 6315 cumulative_tsn_p1, MAX_TSN)) { 6316 /* Yep it is above cum-ack */ 6317 cnt++; 6318 tsn = chk->rec.data.TSN_seq; 6319 if (tsn >= asoc->mapping_array_base_tsn) { 6320 gap = tsn - asoc->mapping_array_base_tsn; 6321 } else { 6322 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 6323 tsn + 1; 6324 } 6325 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6326 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6327 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6328 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6329 if (chk->data) { 6330 sctp_m_freem(chk->data); 6331 chk->data = NULL; 6332 } 6333 sctp_free_a_chunk(stcb, chk); 6334 } 6335 chk = nchk; 6336 } 6337 /* Ok that was fun, now we will drain all the inbound streams? */ 6338 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6339 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); 6340 while (ctl) { 6341 nctl = TAILQ_NEXT(ctl, next); 6342 if (compare_with_wrap(ctl->sinfo_tsn, 6343 cumulative_tsn_p1, MAX_TSN)) { 6344 /* Yep it is above cum-ack */ 6345 cnt++; 6346 tsn = ctl->sinfo_tsn; 6347 if (tsn >= asoc->mapping_array_base_tsn) { 6348 gap = tsn - 6349 asoc->mapping_array_base_tsn; 6350 } else { 6351 gap = (MAX_TSN - 6352 asoc->mapping_array_base_tsn) + 6353 tsn + 1; 6354 } 6355 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6356 sctp_ucount_decr(asoc->cnt_on_all_streams); 6357 6358 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, 6359 gap); 6360 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, 6361 ctl, next); 6362 if (ctl->data) { 6363 sctp_m_freem(ctl->data); 6364 ctl->data = NULL; 6365 } 6366 sctp_free_remote_addr(ctl->whoFrom); 6367 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6368 SCTP_DECR_READQ_COUNT(); 6369 } 6370 ctl = nctl; 6371 } 6372 } 6373 /* 6374 * Question, should we go through the delivery queue? The only 6375 * reason things are on here is the app not reading OR a p-d-api up. 6376 * An attacker COULD send enough in to initiate the PD-API and then 6377 * send a bunch of stuff to other streams... these would wind up on 6378 * the delivery queue.. and then we would not get to them. But in 6379 * order to do this I then have to back-track and un-deliver 6380 * sequence numbers in streams.. el-yucko. I think for now we will 6381 * NOT look at the delivery queue and leave it to be something to 6382 * consider later. An alternative would be to abort the P-D-API with 6383 * a notification and then deliver the data.... Or another method 6384 * might be to keep track of how many times the situation occurs and 6385 * if we see a possible attack underway just abort the association. 6386 */ 6387 #ifdef SCTP_DEBUG 6388 if (cnt) { 6389 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6390 } 6391 #endif 6392 if (cnt) { 6393 /* 6394 * Now do we need to find a new 6395 * asoc->highest_tsn_inside_map? 6396 */ 6397 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) { 6398 gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn; 6399 } else { 6400 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 6401 asoc->highest_tsn_inside_map + 1; 6402 } 6403 if (gap >= (asoc->mapping_array_size << 3)) { 6404 /* 6405 * Something bad happened or cum-ack and high were 6406 * behind the base, but if so earlier checks should 6407 * have found NO data... wierd... we will start at 6408 * end of mapping array. 6409 */ 6410 SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n", 6411 (int)gap, 6412 (int)(asoc->mapping_array_size << 3), 6413 (int)asoc->highest_tsn_inside_map); 6414 gap = asoc->mapping_array_size << 3; 6415 } 6416 while (gap > 0) { 6417 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6418 /* found the new highest */ 6419 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap; 6420 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) { 6421 sctp_log_map(0, 8, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT); 6422 } 6423 break; 6424 } 6425 gap--; 6426 } 6427 if (gap == 0) { 6428 /* Nothing left in map */ 6429 memset(asoc->mapping_array, 0, asoc->mapping_array_size); 6430 asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1; 6431 asoc->highest_tsn_inside_map = asoc->cumulative_tsn; 6432 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) { 6433 sctp_log_map(0, 9, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT); 6434 } 6435 } 6436 asoc->last_revoke_count = cnt; 6437 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6438 /* sa_ignore NO_NULL_CHK */ 6439 sctp_send_sack(stcb); 6440 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6441 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 6442 reneged_at++; 6443 } 6444 /* 6445 * Another issue, in un-setting the TSN's in the mapping array we 6446 * DID NOT adjust the higest_tsn marker. This will cause one of two 6447 * things to occur. It may cause us to do extra work in checking for 6448 * our mapping array movement. More importantly it may cause us to 6449 * SACK every datagram. This may not be a bad thing though since we 6450 * will recover once we get our cum-ack above and all this stuff we 6451 * dumped recovered. 6452 */ 6453 } 6454 6455 void 6456 sctp_drain() 6457 { 6458 /* 6459 * We must walk the PCB lists for ALL associations here. The system 6460 * is LOW on MBUF's and needs help. This is where reneging will 6461 * occur. We really hope this does NOT happen! 6462 */ 6463 struct sctp_inpcb *inp; 6464 struct sctp_tcb *stcb; 6465 6466 SCTP_INP_INFO_RLOCK(); 6467 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6468 /* For each endpoint */ 6469 SCTP_INP_RLOCK(inp); 6470 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6471 /* For each association */ 6472 SCTP_TCB_LOCK(stcb); 6473 sctp_drain_mbufs(inp, stcb); 6474 SCTP_TCB_UNLOCK(stcb); 6475 } 6476 SCTP_INP_RUNLOCK(inp); 6477 } 6478 SCTP_INP_INFO_RUNLOCK(); 6479 } 6480 6481 /* 6482 * start a new iterator 6483 * iterates through all endpoints and associations based on the pcb_state 6484 * flags and asoc_state. "af" (mandatory) is executed for all matching 6485 * assocs and "ef" (optional) is executed when the iterator completes. 6486 * "inpf" (optional) is executed for each new endpoint as it is being 6487 * iterated through. inpe (optional) is called when the inp completes 6488 * its way through all the stcbs. 6489 */ 6490 int 6491 sctp_initiate_iterator(inp_func inpf, 6492 asoc_func af, 6493 inp_func inpe, 6494 uint32_t pcb_state, 6495 uint32_t pcb_features, 6496 uint32_t asoc_state, 6497 void *argp, 6498 uint32_t argi, 6499 end_func ef, 6500 struct sctp_inpcb *s_inp, 6501 uint8_t chunk_output_off) 6502 { 6503 struct sctp_iterator *it = NULL; 6504 6505 if (af == NULL) { 6506 return (-1); 6507 } 6508 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6509 SCTP_M_ITER); 6510 if (it == NULL) { 6511 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6512 return (ENOMEM); 6513 } 6514 memset(it, 0, sizeof(*it)); 6515 it->function_assoc = af; 6516 it->function_inp = inpf; 6517 if (inpf) 6518 it->done_current_ep = 0; 6519 else 6520 it->done_current_ep = 1; 6521 it->function_atend = ef; 6522 it->pointer = argp; 6523 it->val = argi; 6524 it->pcb_flags = pcb_state; 6525 it->pcb_features = pcb_features; 6526 it->asoc_state = asoc_state; 6527 it->function_inp_end = inpe; 6528 it->no_chunk_output = chunk_output_off; 6529 if (s_inp) { 6530 it->inp = s_inp; 6531 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6532 } else { 6533 SCTP_INP_INFO_RLOCK(); 6534 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6535 6536 SCTP_INP_INFO_RUNLOCK(); 6537 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6538 6539 } 6540 SCTP_IPI_ITERATOR_WQ_LOCK(); 6541 if (it->inp) { 6542 SCTP_INP_INCR_REF(it->inp); 6543 } 6544 TAILQ_INSERT_TAIL(&SCTP_BASE_INFO(iteratorhead), it, sctp_nxt_itr); 6545 #if defined(SCTP_USE_THREAD_BASED_ITERATOR) 6546 if (SCTP_BASE_INFO(iterator_running) == 0) { 6547 sctp_wakeup_iterator(); 6548 } 6549 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6550 #else 6551 if (it->inp) 6552 SCTP_INP_DECR_REF(it->inp); 6553 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6554 /* Init the timer */ 6555 SCTP_OS_TIMER_INIT(&it->tmr.timer); 6556 /* add to the list of all iterators */ 6557 sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it, 6558 NULL, NULL); 6559 #endif 6560 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6561 return (0); 6562 } 6563