1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * a) Redistributions of source code must retain the above copyright notice, 8 * this list of conditions and the following disclaimer. 9 * 10 * b) Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the distribution. 13 * 14 * c) Neither the name of Cisco Systems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 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, 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, 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 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 230 if (vrf->vrf_addr_hash) { 231 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 232 vrf->vrf_addr_hash = NULL; 233 } 234 /* We zero'd the count */ 235 LIST_REMOVE(vrf, next_vrf); 236 SCTP_FREE(vrf, SCTP_M_VRF); 237 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 238 } 239 } 240 241 void 242 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 243 { 244 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 245 /* We zero'd the count */ 246 if (sctp_ifnp->vrf) { 247 sctp_free_vrf(sctp_ifnp->vrf); 248 } 249 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 250 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 251 } 252 } 253 254 void 255 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 256 { 257 struct sctp_ifn *sctp_ifnp; 258 259 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 260 if (sctp_ifnp != NULL) { 261 sctp_ifnp->ifn_mtu = mtu; 262 } 263 } 264 265 266 void 267 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 268 { 269 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 270 /* We zero'd the count */ 271 if (sctp_ifap->ifn_p) { 272 sctp_free_ifn(sctp_ifap->ifn_p); 273 } 274 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 275 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 276 } 277 } 278 279 static void 280 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 281 { 282 struct sctp_ifn *found; 283 284 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 285 if (found == NULL) { 286 /* Not in the list.. sorry */ 287 return; 288 } 289 if (hold_addr_lock == 0) 290 SCTP_IPI_ADDR_WLOCK(); 291 LIST_REMOVE(sctp_ifnp, next_bucket); 292 LIST_REMOVE(sctp_ifnp, next_ifn); 293 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 294 sctp_ifnp->registered_af); 295 if (hold_addr_lock == 0) 296 SCTP_IPI_ADDR_WUNLOCK(); 297 /* Take away the reference, and possibly free it */ 298 sctp_free_ifn(sctp_ifnp); 299 } 300 301 void 302 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 303 const char *if_name, uint32_t ifn_index) 304 { 305 struct sctp_vrf *vrf; 306 struct sctp_ifa *sctp_ifap = NULL; 307 308 SCTP_IPI_ADDR_RLOCK(); 309 vrf = sctp_find_vrf(vrf_id); 310 if (vrf == NULL) { 311 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 312 goto out; 313 314 } 315 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 316 if (sctp_ifap == NULL) { 317 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 318 goto out; 319 } 320 if (sctp_ifap->ifn_p == NULL) { 321 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 322 goto out; 323 } 324 if (if_name) { 325 int len1, len2; 326 327 len1 = strlen(if_name); 328 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 329 if (len1 != len2) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n", 331 len1, len2); 332 goto out; 333 } 334 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 335 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 336 sctp_ifap->ifn_p->ifn_name, 337 if_name); 338 goto out; 339 } 340 } else { 341 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 342 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 343 sctp_ifap->ifn_p->ifn_index, ifn_index); 344 goto out; 345 } 346 } 347 348 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 349 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 350 out: 351 SCTP_IPI_ADDR_RUNLOCK(); 352 } 353 354 void 355 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 356 const char *if_name, uint32_t ifn_index) 357 { 358 struct sctp_vrf *vrf; 359 struct sctp_ifa *sctp_ifap = NULL; 360 361 SCTP_IPI_ADDR_RLOCK(); 362 vrf = sctp_find_vrf(vrf_id); 363 if (vrf == NULL) { 364 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 365 goto out; 366 367 } 368 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 369 if (sctp_ifap == NULL) { 370 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 371 goto out; 372 } 373 if (sctp_ifap->ifn_p == NULL) { 374 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 375 goto out; 376 } 377 if (if_name) { 378 int len1, len2; 379 380 len1 = strlen(if_name); 381 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 382 if (len1 != len2) { 383 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different lenght %d vs %d - ignored\n", 384 len1, len2); 385 goto out; 386 } 387 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 389 sctp_ifap->ifn_p->ifn_name, 390 if_name); 391 goto out; 392 } 393 } else { 394 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 395 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 396 sctp_ifap->ifn_p->ifn_index, ifn_index); 397 goto out; 398 } 399 } 400 401 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 402 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 403 out: 404 SCTP_IPI_ADDR_RUNLOCK(); 405 } 406 407 /*- 408 * Add an ifa to an ifn. 409 * Register the interface as necessary. 410 * NOTE: ADDR write lock MUST be held. 411 */ 412 static void 413 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 414 { 415 int ifa_af; 416 417 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 418 sctp_ifap->ifn_p = sctp_ifnp; 419 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 420 /* update address counts */ 421 sctp_ifnp->ifa_count++; 422 ifa_af = sctp_ifap->address.sa.sa_family; 423 if (ifa_af == AF_INET) 424 sctp_ifnp->num_v4++; 425 else 426 sctp_ifnp->num_v6++; 427 if (sctp_ifnp->ifa_count == 1) { 428 /* register the new interface */ 429 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 430 sctp_ifnp->registered_af = ifa_af; 431 } 432 } 433 434 /*- 435 * Remove an ifa from its ifn. 436 * If no more addresses exist, remove the ifn too. Otherwise, re-register 437 * the interface based on the remaining address families left. 438 * NOTE: ADDR write lock MUST be held. 439 */ 440 static void 441 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 442 { 443 uint32_t ifn_index; 444 445 LIST_REMOVE(sctp_ifap, next_ifa); 446 if (sctp_ifap->ifn_p) { 447 /* update address counts */ 448 sctp_ifap->ifn_p->ifa_count--; 449 if (sctp_ifap->address.sa.sa_family == AF_INET6) 450 sctp_ifap->ifn_p->num_v6--; 451 else if (sctp_ifap->address.sa.sa_family == AF_INET) 452 sctp_ifap->ifn_p->num_v4--; 453 454 ifn_index = sctp_ifap->ifn_p->ifn_index; 455 if (SCTP_LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 456 /* remove the ifn, possibly freeing it */ 457 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 458 } else { 459 /* re-register address family type, if needed */ 460 if ((sctp_ifap->ifn_p->num_v6 == 0) && 461 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 462 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6); 463 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET); 464 sctp_ifap->ifn_p->registered_af = AF_INET; 465 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 466 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 467 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET); 468 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6); 469 sctp_ifap->ifn_p->registered_af = AF_INET6; 470 } 471 /* free the ifn refcount */ 472 sctp_free_ifn(sctp_ifap->ifn_p); 473 } 474 sctp_ifap->ifn_p = NULL; 475 } 476 } 477 478 struct sctp_ifa * 479 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 480 uint32_t ifn_type, const char *if_name, void *ifa, 481 struct sockaddr *addr, uint32_t ifa_flags, 482 int dynamic_add) 483 { 484 struct sctp_vrf *vrf; 485 struct sctp_ifn *sctp_ifnp = NULL; 486 struct sctp_ifa *sctp_ifap = NULL; 487 struct sctp_ifalist *hash_addr_head; 488 struct sctp_ifnlist *hash_ifn_head; 489 uint32_t hash_of_addr; 490 int new_ifn_af = 0; 491 492 #ifdef SCTP_DEBUG 493 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 494 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 495 #endif 496 SCTP_IPI_ADDR_WLOCK(); 497 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 498 if (sctp_ifnp) { 499 vrf = sctp_ifnp->vrf; 500 } else { 501 vrf = sctp_find_vrf(vrf_id); 502 if (vrf == NULL) { 503 vrf = sctp_allocate_vrf(vrf_id); 504 if (vrf == NULL) { 505 SCTP_IPI_ADDR_WUNLOCK(); 506 return (NULL); 507 } 508 } 509 } 510 if (sctp_ifnp == NULL) { 511 /* 512 * build one and add it, can't hold lock until after malloc 513 * done though. 514 */ 515 SCTP_IPI_ADDR_WUNLOCK(); 516 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 517 sizeof(struct sctp_ifn), SCTP_M_IFN); 518 if (sctp_ifnp == NULL) { 519 #ifdef INVARIANTS 520 panic("No memory for IFN:%u", sctp_ifnp->ifn_index); 521 #endif 522 return (NULL); 523 } 524 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 525 sctp_ifnp->ifn_index = ifn_index; 526 sctp_ifnp->ifn_p = ifn; 527 sctp_ifnp->ifn_type = ifn_type; 528 sctp_ifnp->refcount = 0; 529 sctp_ifnp->vrf = vrf; 530 atomic_add_int(&vrf->refcount, 1); 531 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 532 if (if_name != NULL) { 533 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ); 534 } else { 535 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ)); 536 } 537 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 538 LIST_INIT(&sctp_ifnp->ifalist); 539 SCTP_IPI_ADDR_WLOCK(); 540 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 541 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 542 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 543 new_ifn_af = 1; 544 } 545 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 546 if (sctp_ifap) { 547 /* Hmm, it already exists? */ 548 if ((sctp_ifap->ifn_p) && 549 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 550 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 551 sctp_ifap->ifn_p->ifn_name, ifn_index, 552 sctp_ifap); 553 if (new_ifn_af) { 554 /* Remove the created one that we don't want */ 555 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 556 } 557 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 558 /* easy to solve, just switch back to active */ 559 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 560 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 561 sctp_ifap->ifn_p = sctp_ifnp; 562 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 563 } 564 exit_stage_left: 565 SCTP_IPI_ADDR_WUNLOCK(); 566 return (sctp_ifap); 567 } else { 568 if (sctp_ifap->ifn_p) { 569 /* 570 * The last IFN gets the address, removee 571 * the old one 572 */ 573 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 574 sctp_ifap, sctp_ifap->ifn_p->ifn_name, 575 sctp_ifap->ifn_p->ifn_index, if_name, 576 ifn_index); 577 /* remove the address from the old ifn */ 578 sctp_remove_ifa_from_ifn(sctp_ifap); 579 /* move the address over to the new ifn */ 580 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 581 goto exit_stage_left; 582 } else { 583 /* repair ifnp which was NULL ? */ 584 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 585 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 586 sctp_ifnp, sctp_ifap); 587 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 588 } 589 goto exit_stage_left; 590 } 591 } 592 SCTP_IPI_ADDR_WUNLOCK(); 593 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 594 if (sctp_ifap == NULL) { 595 #ifdef INVARIANTS 596 panic("No memory for IFA"); 597 #endif 598 return (NULL); 599 } 600 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 601 sctp_ifap->ifn_p = sctp_ifnp; 602 atomic_add_int(&sctp_ifnp->refcount, 1); 603 sctp_ifap->vrf_id = vrf_id; 604 sctp_ifap->ifa = ifa; 605 memcpy(&sctp_ifap->address, addr, addr->sa_len); 606 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 607 sctp_ifap->flags = ifa_flags; 608 /* Set scope */ 609 switch (sctp_ifap->address.sa.sa_family) { 610 case AF_INET: 611 { 612 struct sockaddr_in *sin; 613 614 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 615 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 616 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 617 sctp_ifap->src_is_loop = 1; 618 } 619 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 620 sctp_ifap->src_is_priv = 1; 621 } 622 sctp_ifnp->num_v4++; 623 if (new_ifn_af) 624 new_ifn_af = AF_INET; 625 break; 626 } 627 #ifdef INET6 628 case AF_INET6: 629 { 630 /* ok to use deprecated addresses? */ 631 struct sockaddr_in6 *sin6; 632 633 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 634 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 635 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 636 sctp_ifap->src_is_loop = 1; 637 } 638 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 639 sctp_ifap->src_is_priv = 1; 640 } 641 sctp_ifnp->num_v6++; 642 if (new_ifn_af) 643 new_ifn_af = AF_INET6; 644 break; 645 } 646 #endif 647 default: 648 new_ifn_af = 0; 649 break; 650 } 651 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 652 653 if ((sctp_ifap->src_is_priv == 0) && 654 (sctp_ifap->src_is_loop == 0)) { 655 sctp_ifap->src_is_glob = 1; 656 } 657 SCTP_IPI_ADDR_WLOCK(); 658 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 659 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 660 sctp_ifap->refcount = 1; 661 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 662 sctp_ifnp->ifa_count++; 663 vrf->total_ifa_count++; 664 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 665 if (new_ifn_af) { 666 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 667 sctp_ifnp->registered_af = new_ifn_af; 668 } 669 SCTP_IPI_ADDR_WUNLOCK(); 670 if (dynamic_add) { 671 /* 672 * Bump up the refcount so that when the timer completes it 673 * will drop back down. 674 */ 675 struct sctp_laddr *wi; 676 677 atomic_add_int(&sctp_ifap->refcount, 1); 678 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 679 if (wi == NULL) { 680 /* 681 * Gak, what can we do? We have lost an address 682 * change can you say HOSED? 683 */ 684 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 685 /* Opps, must decrement the count */ 686 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 687 if_name); 688 return (NULL); 689 } 690 SCTP_INCR_LADDR_COUNT(); 691 bzero(wi, sizeof(*wi)); 692 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 693 wi->ifa = sctp_ifap; 694 wi->action = SCTP_ADD_IP_ADDRESS; 695 SCTP_IPI_ITERATOR_WQ_LOCK(); 696 /* 697 * Should this really be a tailq? As it is we will process 698 * the newest first :-0 699 */ 700 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 701 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 702 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 703 (struct sctp_inpcb *)NULL, 704 (struct sctp_tcb *)NULL, 705 (struct sctp_nets *)NULL); 706 } else { 707 /* it's ready for use */ 708 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 709 } 710 return (sctp_ifap); 711 } 712 713 void 714 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 715 uint32_t ifn_index, const char *if_name) 716 { 717 struct sctp_vrf *vrf; 718 struct sctp_ifa *sctp_ifap = NULL; 719 720 SCTP_IPI_ADDR_WLOCK(); 721 vrf = sctp_find_vrf(vrf_id); 722 if (vrf == NULL) { 723 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 724 goto out_now; 725 } 726 #ifdef SCTP_DEBUG 727 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 728 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 729 #endif 730 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 731 if (sctp_ifap) { 732 /* Validate the delete */ 733 if (sctp_ifap->ifn_p) { 734 int valid = 0; 735 736 /*- 737 * The name has priority over the ifn_index 738 * if its given. We do this especially for 739 * panda who might recycle indexes fast. 740 */ 741 if (if_name) { 742 int len1, len2; 743 744 len1 = min(SCTP_IFNAMSIZ, strlen(if_name)); 745 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name)); 746 if (len1 && len2 && (len1 == len2)) { 747 /* we can compare them */ 748 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) { 749 /* 750 * They match its a correct 751 * delete 752 */ 753 valid = 1; 754 } 755 } 756 } 757 if (!valid) { 758 /* last ditch check ifn_index */ 759 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 760 valid = 1; 761 } 762 } 763 if (!valid) { 764 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 765 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 766 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 767 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 768 SCTP_IPI_ADDR_WUNLOCK(); 769 return; 770 } 771 } 772 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap); 773 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 774 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 775 vrf->total_ifa_count--; 776 LIST_REMOVE(sctp_ifap, next_bucket); 777 sctp_remove_ifa_from_ifn(sctp_ifap); 778 } 779 #ifdef SCTP_DEBUG 780 else { 781 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 782 ifn_index); 783 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 784 } 785 #endif 786 787 out_now: 788 SCTP_IPI_ADDR_WUNLOCK(); 789 if (sctp_ifap) { 790 struct sctp_laddr *wi; 791 792 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 793 if (wi == NULL) { 794 /* 795 * Gak, what can we do? We have lost an address 796 * change can you say HOSED? 797 */ 798 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 799 800 /* Oops, must decrement the count */ 801 sctp_free_ifa(sctp_ifap); 802 return; 803 } 804 SCTP_INCR_LADDR_COUNT(); 805 bzero(wi, sizeof(*wi)); 806 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 807 wi->ifa = sctp_ifap; 808 wi->action = SCTP_DEL_IP_ADDRESS; 809 SCTP_IPI_ITERATOR_WQ_LOCK(); 810 /* 811 * Should this really be a tailq? As it is we will process 812 * the newest first :-0 813 */ 814 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 815 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 816 817 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 818 (struct sctp_inpcb *)NULL, 819 (struct sctp_tcb *)NULL, 820 (struct sctp_nets *)NULL); 821 } 822 return; 823 } 824 825 826 static struct sctp_tcb * 827 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 828 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 829 { 830 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 831 /* 832 * If we support the TCP model, then we must now dig through to see 833 * if we can find our endpoint in the list of tcp ep's. 834 */ 835 uint16_t lport, rport; 836 struct sctppcbhead *ephead; 837 struct sctp_inpcb *inp; 838 struct sctp_laddr *laddr; 839 struct sctp_tcb *stcb; 840 struct sctp_nets *net; 841 842 if ((to == NULL) || (from == NULL)) { 843 return (NULL); 844 } 845 if (to->sa_family == AF_INET && from->sa_family == AF_INET) { 846 lport = ((struct sockaddr_in *)to)->sin_port; 847 rport = ((struct sockaddr_in *)from)->sin_port; 848 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) { 849 lport = ((struct sockaddr_in6 *)to)->sin6_port; 850 rport = ((struct sockaddr_in6 *)from)->sin6_port; 851 } else { 852 return NULL; 853 } 854 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), SCTP_BASE_INFO(hashtcpmark))]; 855 /* 856 * Ok now for each of the guys in this bucket we must look and see: 857 * - Does the remote port match. - Does there single association's 858 * addresses match this address (to). If so we update p_ep to point 859 * to this ep and return the tcb from it. 860 */ 861 LIST_FOREACH(inp, ephead, sctp_hash) { 862 SCTP_INP_RLOCK(inp); 863 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 864 SCTP_INP_RUNLOCK(inp); 865 continue; 866 } 867 if (lport != inp->sctp_lport) { 868 SCTP_INP_RUNLOCK(inp); 869 continue; 870 } 871 if (inp->def_vrf_id != vrf_id) { 872 SCTP_INP_RUNLOCK(inp); 873 continue; 874 } 875 /* check to see if the ep has one of the addresses */ 876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 877 /* We are NOT bound all, so look further */ 878 int match = 0; 879 880 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 881 882 if (laddr->ifa == NULL) { 883 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 884 continue; 885 } 886 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 887 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 888 continue; 889 } 890 if (laddr->ifa->address.sa.sa_family == 891 to->sa_family) { 892 /* see if it matches */ 893 struct sockaddr_in *intf_addr, *sin; 894 895 intf_addr = &laddr->ifa->address.sin; 896 sin = (struct sockaddr_in *)to; 897 if (from->sa_family == AF_INET) { 898 if (sin->sin_addr.s_addr == 899 intf_addr->sin_addr.s_addr) { 900 match = 1; 901 break; 902 } 903 } 904 #ifdef INET6 905 if (from->sa_family == AF_INET6) { 906 struct sockaddr_in6 *intf_addr6; 907 struct sockaddr_in6 *sin6; 908 909 sin6 = (struct sockaddr_in6 *) 910 to; 911 intf_addr6 = &laddr->ifa->address.sin6; 912 913 if (SCTP6_ARE_ADDR_EQUAL(sin6, 914 intf_addr6)) { 915 match = 1; 916 break; 917 } 918 } 919 #endif 920 } 921 } 922 if (match == 0) { 923 /* This endpoint does not have this address */ 924 SCTP_INP_RUNLOCK(inp); 925 continue; 926 } 927 } 928 /* 929 * Ok if we hit here the ep has the address, does it hold 930 * the tcb? 931 */ 932 933 stcb = LIST_FIRST(&inp->sctp_asoc_list); 934 if (stcb == NULL) { 935 SCTP_INP_RUNLOCK(inp); 936 continue; 937 } 938 SCTP_TCB_LOCK(stcb); 939 if (stcb->rport != rport) { 940 /* remote port does not match. */ 941 SCTP_TCB_UNLOCK(stcb); 942 SCTP_INP_RUNLOCK(inp); 943 continue; 944 } 945 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 946 SCTP_TCB_UNLOCK(stcb); 947 SCTP_INP_RUNLOCK(inp); 948 continue; 949 } 950 /* Does this TCB have a matching address? */ 951 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 952 953 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 954 /* not the same family, can't be a match */ 955 continue; 956 } 957 switch (from->sa_family) { 958 case AF_INET: 959 { 960 struct sockaddr_in *sin, *rsin; 961 962 sin = (struct sockaddr_in *)&net->ro._l_addr; 963 rsin = (struct sockaddr_in *)from; 964 if (sin->sin_addr.s_addr == 965 rsin->sin_addr.s_addr) { 966 /* found it */ 967 if (netp != NULL) { 968 *netp = net; 969 } 970 /* 971 * Update the endpoint 972 * pointer 973 */ 974 *inp_p = inp; 975 SCTP_INP_RUNLOCK(inp); 976 return (stcb); 977 } 978 break; 979 } 980 #ifdef INET6 981 case AF_INET6: 982 { 983 struct sockaddr_in6 *sin6, *rsin6; 984 985 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 986 rsin6 = (struct sockaddr_in6 *)from; 987 if (SCTP6_ARE_ADDR_EQUAL(sin6, 988 rsin6)) { 989 /* found it */ 990 if (netp != NULL) { 991 *netp = net; 992 } 993 /* 994 * Update the endpoint 995 * pointer 996 */ 997 *inp_p = inp; 998 SCTP_INP_RUNLOCK(inp); 999 return (stcb); 1000 } 1001 break; 1002 } 1003 #endif 1004 default: 1005 /* TSNH */ 1006 break; 1007 } 1008 } 1009 SCTP_TCB_UNLOCK(stcb); 1010 SCTP_INP_RUNLOCK(inp); 1011 } 1012 return (NULL); 1013 } 1014 1015 /* 1016 * rules for use 1017 * 1018 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1019 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1020 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1021 * NULL. 1022 */ 1023 1024 struct sctp_tcb * 1025 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1026 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1027 { 1028 struct sctpasochead *head; 1029 struct sctp_inpcb *inp; 1030 struct sctp_tcb *stcb = NULL; 1031 struct sctp_nets *net; 1032 uint16_t rport; 1033 1034 inp = *inp_p; 1035 if (remote->sa_family == AF_INET) { 1036 rport = (((struct sockaddr_in *)remote)->sin_port); 1037 } else if (remote->sa_family == AF_INET6) { 1038 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1039 } else { 1040 return (NULL); 1041 } 1042 if (locked_tcb) { 1043 /* 1044 * UN-lock so we can do proper locking here this occurs when 1045 * called from load_addresses_from_init. 1046 */ 1047 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1048 SCTP_TCB_UNLOCK(locked_tcb); 1049 } 1050 SCTP_INP_INFO_RLOCK(); 1051 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1052 /*- 1053 * Now either this guy is our listener or it's the 1054 * connector. If it is the one that issued the connect, then 1055 * it's only chance is to be the first TCB in the list. If 1056 * it is the acceptor, then do the special_lookup to hash 1057 * and find the real inp. 1058 */ 1059 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1060 /* to is peer addr, from is my addr */ 1061 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1062 netp, inp->def_vrf_id); 1063 if ((stcb != NULL) && (locked_tcb == NULL)) { 1064 /* we have a locked tcb, lower refcount */ 1065 SCTP_INP_DECR_REF(inp); 1066 } 1067 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1068 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1069 SCTP_TCB_LOCK(locked_tcb); 1070 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1071 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1072 } 1073 SCTP_INP_INFO_RUNLOCK(); 1074 return (stcb); 1075 } else { 1076 SCTP_INP_WLOCK(inp); 1077 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1078 goto null_return; 1079 } 1080 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1081 if (stcb == NULL) { 1082 goto null_return; 1083 } 1084 SCTP_TCB_LOCK(stcb); 1085 1086 if (stcb->rport != rport) { 1087 /* remote port does not match. */ 1088 SCTP_TCB_UNLOCK(stcb); 1089 goto null_return; 1090 } 1091 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1092 SCTP_TCB_UNLOCK(stcb); 1093 goto null_return; 1094 } 1095 /* now look at the list of remote addresses */ 1096 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1097 #ifdef INVARIANTS 1098 if (net == (TAILQ_NEXT(net, sctp_next))) { 1099 panic("Corrupt net list"); 1100 } 1101 #endif 1102 if (net->ro._l_addr.sa.sa_family != 1103 remote->sa_family) { 1104 /* not the same family */ 1105 continue; 1106 } 1107 switch (remote->sa_family) { 1108 case AF_INET: 1109 { 1110 struct sockaddr_in *sin, 1111 *rsin; 1112 1113 sin = (struct sockaddr_in *) 1114 &net->ro._l_addr; 1115 rsin = (struct sockaddr_in *)remote; 1116 if (sin->sin_addr.s_addr == 1117 rsin->sin_addr.s_addr) { 1118 /* found it */ 1119 if (netp != NULL) { 1120 *netp = net; 1121 } 1122 if (locked_tcb == NULL) { 1123 SCTP_INP_DECR_REF(inp); 1124 } else if (locked_tcb != stcb) { 1125 SCTP_TCB_LOCK(locked_tcb); 1126 } 1127 if (locked_tcb) { 1128 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1129 } 1130 SCTP_INP_WUNLOCK(inp); 1131 SCTP_INP_INFO_RUNLOCK(); 1132 return (stcb); 1133 } 1134 break; 1135 } 1136 #ifdef INET6 1137 case AF_INET6: 1138 { 1139 struct sockaddr_in6 *sin6, 1140 *rsin6; 1141 1142 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1143 rsin6 = (struct sockaddr_in6 *)remote; 1144 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1145 rsin6)) { 1146 /* found it */ 1147 if (netp != NULL) { 1148 *netp = net; 1149 } 1150 if (locked_tcb == NULL) { 1151 SCTP_INP_DECR_REF(inp); 1152 } else if (locked_tcb != stcb) { 1153 SCTP_TCB_LOCK(locked_tcb); 1154 } 1155 if (locked_tcb) { 1156 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1157 } 1158 SCTP_INP_WUNLOCK(inp); 1159 SCTP_INP_INFO_RUNLOCK(); 1160 return (stcb); 1161 } 1162 break; 1163 } 1164 #endif 1165 default: 1166 /* TSNH */ 1167 break; 1168 } 1169 } 1170 SCTP_TCB_UNLOCK(stcb); 1171 } 1172 } else { 1173 SCTP_INP_WLOCK(inp); 1174 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1175 goto null_return; 1176 } 1177 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1178 inp->sctp_hashmark)]; 1179 if (head == NULL) { 1180 goto null_return; 1181 } 1182 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1183 if (stcb->rport != rport) { 1184 /* remote port does not match */ 1185 continue; 1186 } 1187 SCTP_TCB_LOCK(stcb); 1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1189 SCTP_TCB_UNLOCK(stcb); 1190 continue; 1191 } 1192 /* now look at the list of remote addresses */ 1193 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1194 #ifdef INVARIANTS 1195 if (net == (TAILQ_NEXT(net, sctp_next))) { 1196 panic("Corrupt net list"); 1197 } 1198 #endif 1199 if (net->ro._l_addr.sa.sa_family != 1200 remote->sa_family) { 1201 /* not the same family */ 1202 continue; 1203 } 1204 switch (remote->sa_family) { 1205 case AF_INET: 1206 { 1207 struct sockaddr_in *sin, 1208 *rsin; 1209 1210 sin = (struct sockaddr_in *) 1211 &net->ro._l_addr; 1212 rsin = (struct sockaddr_in *)remote; 1213 if (sin->sin_addr.s_addr == 1214 rsin->sin_addr.s_addr) { 1215 /* found it */ 1216 if (netp != NULL) { 1217 *netp = net; 1218 } 1219 if (locked_tcb == NULL) { 1220 SCTP_INP_DECR_REF(inp); 1221 } else if (locked_tcb != stcb) { 1222 SCTP_TCB_LOCK(locked_tcb); 1223 } 1224 if (locked_tcb) { 1225 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1226 } 1227 SCTP_INP_WUNLOCK(inp); 1228 SCTP_INP_INFO_RUNLOCK(); 1229 return (stcb); 1230 } 1231 break; 1232 } 1233 #ifdef INET6 1234 case AF_INET6: 1235 { 1236 struct sockaddr_in6 *sin6, 1237 *rsin6; 1238 1239 sin6 = (struct sockaddr_in6 *) 1240 &net->ro._l_addr; 1241 rsin6 = (struct sockaddr_in6 *)remote; 1242 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1243 rsin6)) { 1244 /* found it */ 1245 if (netp != NULL) { 1246 *netp = net; 1247 } 1248 if (locked_tcb == NULL) { 1249 SCTP_INP_DECR_REF(inp); 1250 } else if (locked_tcb != stcb) { 1251 SCTP_TCB_LOCK(locked_tcb); 1252 } 1253 if (locked_tcb) { 1254 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1255 } 1256 SCTP_INP_WUNLOCK(inp); 1257 SCTP_INP_INFO_RUNLOCK(); 1258 return (stcb); 1259 } 1260 break; 1261 } 1262 #endif 1263 default: 1264 /* TSNH */ 1265 break; 1266 } 1267 } 1268 SCTP_TCB_UNLOCK(stcb); 1269 } 1270 } 1271 null_return: 1272 /* clean up for returning null */ 1273 if (locked_tcb) { 1274 SCTP_TCB_LOCK(locked_tcb); 1275 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1276 } 1277 SCTP_INP_WUNLOCK(inp); 1278 SCTP_INP_INFO_RUNLOCK(); 1279 /* not found */ 1280 return (NULL); 1281 } 1282 1283 /* 1284 * Find an association for a specific endpoint using the association id given 1285 * out in the COMM_UP notification 1286 */ 1287 1288 struct sctp_tcb * 1289 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1290 { 1291 /* 1292 * Use my the assoc_id to find a endpoint 1293 */ 1294 struct sctpasochead *head; 1295 struct sctp_tcb *stcb; 1296 uint32_t id; 1297 1298 if (inp == NULL) { 1299 SCTP_PRINTF("TSNH ep_associd\n"); 1300 return (NULL); 1301 } 1302 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1303 SCTP_PRINTF("TSNH ep_associd0\n"); 1304 return (NULL); 1305 } 1306 id = (uint32_t) asoc_id; 1307 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1308 if (head == NULL) { 1309 /* invalid id TSNH */ 1310 SCTP_PRINTF("TSNH ep_associd1\n"); 1311 return (NULL); 1312 } 1313 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1314 if (stcb->asoc.assoc_id == id) { 1315 if (inp != stcb->sctp_ep) { 1316 /* 1317 * some other guy has the same id active (id 1318 * collision ??). 1319 */ 1320 SCTP_PRINTF("TSNH ep_associd2\n"); 1321 continue; 1322 } 1323 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1324 continue; 1325 } 1326 if (want_lock) { 1327 SCTP_TCB_LOCK(stcb); 1328 } 1329 return (stcb); 1330 } 1331 } 1332 return (NULL); 1333 } 1334 1335 1336 struct sctp_tcb * 1337 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1338 { 1339 struct sctp_tcb *stcb; 1340 1341 SCTP_INP_RLOCK(inp); 1342 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1343 SCTP_INP_RUNLOCK(inp); 1344 return (stcb); 1345 } 1346 1347 1348 static struct sctp_inpcb * 1349 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1350 uint16_t lport, uint32_t vrf_id) 1351 { 1352 struct sctp_inpcb *inp; 1353 struct sockaddr_in *sin; 1354 1355 #ifdef INET6 1356 struct sockaddr_in6 *sin6; 1357 1358 #endif 1359 struct sctp_laddr *laddr; 1360 1361 #ifdef INET6 1362 struct sockaddr_in6 *intf_addr6; 1363 1364 #endif 1365 1366 int fnd; 1367 1368 /* 1369 * Endpoing probe expects that the INP_INFO is locked. 1370 */ 1371 sin = NULL; 1372 #ifdef INET6 1373 sin6 = NULL; 1374 #endif 1375 switch (nam->sa_family) { 1376 case AF_INET: 1377 sin = (struct sockaddr_in *)nam; 1378 break; 1379 #ifdef INET6 1380 case AF_INET6: 1381 sin6 = (struct sockaddr_in6 *)nam; 1382 break; 1383 #endif 1384 default: 1385 /* unsupported family */ 1386 return (NULL); 1387 } 1388 1389 if (head == NULL) 1390 return (NULL); 1391 1392 LIST_FOREACH(inp, head, sctp_hash) { 1393 SCTP_INP_RLOCK(inp); 1394 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1395 SCTP_INP_RUNLOCK(inp); 1396 continue; 1397 } 1398 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1399 (inp->sctp_lport == lport)) { 1400 /* got it */ 1401 if ((nam->sa_family == AF_INET) && 1402 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1403 SCTP_IPV6_V6ONLY(inp)) { 1404 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1405 SCTP_INP_RUNLOCK(inp); 1406 continue; 1407 } 1408 /* A V6 address and the endpoint is NOT bound V6 */ 1409 if (nam->sa_family == AF_INET6 && 1410 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1411 SCTP_INP_RUNLOCK(inp); 1412 continue; 1413 } 1414 /* does a VRF id match? */ 1415 fnd = 0; 1416 if (inp->def_vrf_id == vrf_id) 1417 fnd = 1; 1418 1419 SCTP_INP_RUNLOCK(inp); 1420 if (!fnd) 1421 continue; 1422 return (inp); 1423 } 1424 SCTP_INP_RUNLOCK(inp); 1425 } 1426 if ((nam->sa_family == AF_INET) && 1427 (sin->sin_addr.s_addr == INADDR_ANY)) { 1428 /* Can't hunt for one that has no address specified */ 1429 return (NULL); 1430 } 1431 #ifdef INET6 1432 if ((nam->sa_family == AF_INET6) && 1433 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 1434 /* Can't hunt for one that has no address specified */ 1435 return (NULL); 1436 } 1437 #endif 1438 /* 1439 * ok, not bound to all so see if we can find a EP bound to this 1440 * address. 1441 */ 1442 LIST_FOREACH(inp, head, sctp_hash) { 1443 SCTP_INP_RLOCK(inp); 1444 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1445 SCTP_INP_RUNLOCK(inp); 1446 continue; 1447 } 1448 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1449 SCTP_INP_RUNLOCK(inp); 1450 continue; 1451 } 1452 /* 1453 * Ok this could be a likely candidate, look at all of its 1454 * addresses 1455 */ 1456 if (inp->sctp_lport != lport) { 1457 SCTP_INP_RUNLOCK(inp); 1458 continue; 1459 } 1460 /* does a VRF id match? */ 1461 fnd = 0; 1462 if (inp->def_vrf_id == vrf_id) 1463 fnd = 1; 1464 1465 if (!fnd) { 1466 SCTP_INP_RUNLOCK(inp); 1467 continue; 1468 } 1469 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1470 if (laddr->ifa == NULL) { 1471 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1472 __FUNCTION__); 1473 continue; 1474 } 1475 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1476 laddr->ifa); 1477 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1478 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1479 continue; 1480 } 1481 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1482 /* possible, see if it matches */ 1483 struct sockaddr_in *intf_addr; 1484 1485 intf_addr = &laddr->ifa->address.sin; 1486 switch (nam->sa_family) { 1487 case AF_INET: 1488 if (sin->sin_addr.s_addr == 1489 intf_addr->sin_addr.s_addr) { 1490 SCTP_INP_RUNLOCK(inp); 1491 return (inp); 1492 } 1493 break; 1494 #ifdef INET6 1495 case AF_INET6: 1496 intf_addr6 = &laddr->ifa->address.sin6; 1497 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1498 intf_addr6)) { 1499 SCTP_INP_RUNLOCK(inp); 1500 return (inp); 1501 } 1502 break; 1503 #endif 1504 } 1505 } 1506 } 1507 SCTP_INP_RUNLOCK(inp); 1508 } 1509 return (NULL); 1510 } 1511 1512 1513 static struct sctp_inpcb * 1514 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1515 { 1516 struct sctppcbhead *head; 1517 struct sctp_inpcb *t_inp; 1518 int fnd; 1519 1520 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1521 SCTP_BASE_INFO(hashmark))]; 1522 LIST_FOREACH(t_inp, head, sctp_hash) { 1523 if (t_inp->sctp_lport != lport) { 1524 continue; 1525 } 1526 /* is it in the VRF in question */ 1527 fnd = 0; 1528 if (t_inp->def_vrf_id == vrf_id) 1529 fnd = 1; 1530 if (!fnd) 1531 continue; 1532 1533 /* This one is in use. */ 1534 /* check the v6/v4 binding issue */ 1535 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1536 SCTP_IPV6_V6ONLY(t_inp)) { 1537 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1538 /* collision in V6 space */ 1539 return (t_inp); 1540 } else { 1541 /* inp is BOUND_V4 no conflict */ 1542 continue; 1543 } 1544 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1545 /* t_inp is bound v4 and v6, conflict always */ 1546 return (t_inp); 1547 } else { 1548 /* t_inp is bound only V4 */ 1549 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1550 SCTP_IPV6_V6ONLY(inp)) { 1551 /* no conflict */ 1552 continue; 1553 } 1554 /* else fall through to conflict */ 1555 } 1556 return (t_inp); 1557 } 1558 return (NULL); 1559 } 1560 1561 1562 int 1563 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1564 { 1565 /* For 1-2-1 with port reuse */ 1566 struct sctppcbhead *head; 1567 struct sctp_inpcb *tinp; 1568 1569 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1570 /* only works with port reuse on */ 1571 return (-1); 1572 } 1573 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1574 return (0); 1575 } 1576 SCTP_INP_RUNLOCK(inp); 1577 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1578 SCTP_BASE_INFO(hashmark))]; 1579 /* Kick out all non-listeners to the TCP hash */ 1580 LIST_FOREACH(tinp, head, sctp_hash) { 1581 if (tinp->sctp_lport != inp->sctp_lport) { 1582 continue; 1583 } 1584 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1585 continue; 1586 } 1587 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1588 continue; 1589 } 1590 if (tinp->sctp_socket->so_qlimit) { 1591 continue; 1592 } 1593 SCTP_INP_WLOCK(tinp); 1594 LIST_REMOVE(tinp, sctp_hash); 1595 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1596 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1597 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1598 SCTP_INP_WUNLOCK(tinp); 1599 } 1600 SCTP_INP_WLOCK(inp); 1601 /* Pull from where he was */ 1602 LIST_REMOVE(inp, sctp_hash); 1603 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1604 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1605 LIST_INSERT_HEAD(head, inp, sctp_hash); 1606 SCTP_INP_WUNLOCK(inp); 1607 SCTP_INP_RLOCK(inp); 1608 return (0); 1609 } 1610 1611 1612 struct sctp_inpcb * 1613 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1614 uint32_t vrf_id) 1615 { 1616 /* 1617 * First we check the hash table to see if someone has this port 1618 * bound with just the port. 1619 */ 1620 struct sctp_inpcb *inp; 1621 struct sctppcbhead *head; 1622 struct sockaddr_in *sin; 1623 struct sockaddr_in6 *sin6; 1624 int lport; 1625 1626 if (nam->sa_family == AF_INET) { 1627 sin = (struct sockaddr_in *)nam; 1628 lport = ((struct sockaddr_in *)nam)->sin_port; 1629 } else if (nam->sa_family == AF_INET6) { 1630 sin6 = (struct sockaddr_in6 *)nam; 1631 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1632 } else { 1633 /* unsupported family */ 1634 return (NULL); 1635 } 1636 /* 1637 * I could cheat here and just cast to one of the types but we will 1638 * do it right. It also provides the check against an Unsupported 1639 * type too. 1640 */ 1641 /* Find the head of the ALLADDR chain */ 1642 if (have_lock == 0) { 1643 SCTP_INP_INFO_RLOCK(); 1644 } 1645 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1646 SCTP_BASE_INFO(hashmark))]; 1647 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1648 1649 /* 1650 * If the TCP model exists it could be that the main listening 1651 * endpoint is gone but there exists a connected socket for this guy 1652 * yet. If so we can return the first one that we find. This may NOT 1653 * be the correct one so the caller should be wary on the return 1654 * INP. Currently the onlyc caller that sets this flag is in bindx 1655 * where we are verifying that a user CAN bind the address. He 1656 * either has bound it already, or someone else has, or its open to 1657 * bind, so this is good enough. 1658 */ 1659 if (inp == NULL && find_tcp_pool) { 1660 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 1661 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1662 } 1663 if (inp) { 1664 SCTP_INP_INCR_REF(inp); 1665 } 1666 if (have_lock == 0) { 1667 SCTP_INP_INFO_RUNLOCK(); 1668 } 1669 return (inp); 1670 } 1671 1672 /* 1673 * Find an association for an endpoint with the pointer to whom you want to 1674 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1675 * need to change the *to to some other struct like a mbuf... 1676 */ 1677 struct sctp_tcb * 1678 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1679 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1680 uint32_t vrf_id) 1681 { 1682 struct sctp_inpcb *inp = NULL; 1683 struct sctp_tcb *retval; 1684 1685 SCTP_INP_INFO_RLOCK(); 1686 if (find_tcp_pool) { 1687 if (inp_p != NULL) { 1688 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1689 vrf_id); 1690 } else { 1691 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1692 vrf_id); 1693 } 1694 if (retval != NULL) { 1695 SCTP_INP_INFO_RUNLOCK(); 1696 return (retval); 1697 } 1698 } 1699 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1700 if (inp_p != NULL) { 1701 *inp_p = inp; 1702 } 1703 SCTP_INP_INFO_RUNLOCK(); 1704 1705 if (inp == NULL) { 1706 return (NULL); 1707 } 1708 /* 1709 * ok, we have an endpoint, now lets find the assoc for it (if any) 1710 * we now place the source address or from in the to of the find 1711 * endpoint call. Since in reality this chain is used from the 1712 * inbound packet side. 1713 */ 1714 if (inp_p != NULL) { 1715 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1716 NULL); 1717 } else { 1718 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1719 NULL); 1720 } 1721 return retval; 1722 } 1723 1724 1725 /* 1726 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1727 * find all addresses that the sender has specified in any address list. Each 1728 * address will be used to lookup the TCB and see if one exits. 1729 */ 1730 static struct sctp_tcb * 1731 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1732 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1733 struct sockaddr *dest) 1734 { 1735 struct sockaddr_in sin4; 1736 struct sockaddr_in6 sin6; 1737 struct sctp_paramhdr *phdr, parm_buf; 1738 struct sctp_tcb *retval; 1739 uint32_t ptype, plen; 1740 1741 memset(&sin4, 0, sizeof(sin4)); 1742 memset(&sin6, 0, sizeof(sin6)); 1743 sin4.sin_len = sizeof(sin4); 1744 sin4.sin_family = AF_INET; 1745 sin4.sin_port = sh->src_port; 1746 sin6.sin6_len = sizeof(sin6); 1747 sin6.sin6_family = AF_INET6; 1748 sin6.sin6_port = sh->src_port; 1749 1750 retval = NULL; 1751 offset += sizeof(struct sctp_init_chunk); 1752 1753 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1754 while (phdr != NULL) { 1755 /* now we must see if we want the parameter */ 1756 ptype = ntohs(phdr->param_type); 1757 plen = ntohs(phdr->param_length); 1758 if (plen == 0) { 1759 break; 1760 } 1761 if (ptype == SCTP_IPV4_ADDRESS && 1762 plen == sizeof(struct sctp_ipv4addr_param)) { 1763 /* Get the rest of the address */ 1764 struct sctp_ipv4addr_param ip4_parm, *p4; 1765 1766 phdr = sctp_get_next_param(m, offset, 1767 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1768 if (phdr == NULL) { 1769 return (NULL); 1770 } 1771 p4 = (struct sctp_ipv4addr_param *)phdr; 1772 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 1773 /* look it up */ 1774 retval = sctp_findassociation_ep_addr(inp_p, 1775 (struct sockaddr *)&sin4, netp, dest, NULL); 1776 if (retval != NULL) { 1777 return (retval); 1778 } 1779 } else if (ptype == SCTP_IPV6_ADDRESS && 1780 plen == sizeof(struct sctp_ipv6addr_param)) { 1781 /* Get the rest of the address */ 1782 struct sctp_ipv6addr_param ip6_parm, *p6; 1783 1784 phdr = sctp_get_next_param(m, offset, 1785 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 1786 if (phdr == NULL) { 1787 return (NULL); 1788 } 1789 p6 = (struct sctp_ipv6addr_param *)phdr; 1790 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 1791 /* look it up */ 1792 retval = sctp_findassociation_ep_addr(inp_p, 1793 (struct sockaddr *)&sin6, netp, dest, NULL); 1794 if (retval != NULL) { 1795 return (retval); 1796 } 1797 } 1798 offset += SCTP_SIZE32(plen); 1799 phdr = sctp_get_next_param(m, offset, &parm_buf, 1800 sizeof(parm_buf)); 1801 } 1802 return (NULL); 1803 } 1804 1805 static int 1806 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1807 { 1808 struct sctp_nets *net; 1809 1810 /* 1811 * Simple question, the ports match, does the tcb own the to 1812 * address? 1813 */ 1814 if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1815 /* of course */ 1816 return (1); 1817 } 1818 /* have to look at all bound addresses */ 1819 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1820 if (net->ro._l_addr.sa.sa_family != to->sa_family) { 1821 /* not the same family, can't be a match */ 1822 continue; 1823 } 1824 switch (to->sa_family) { 1825 case AF_INET: 1826 { 1827 struct sockaddr_in *sin, *rsin; 1828 1829 sin = (struct sockaddr_in *)&net->ro._l_addr; 1830 rsin = (struct sockaddr_in *)to; 1831 if (sin->sin_addr.s_addr == 1832 rsin->sin_addr.s_addr) { 1833 /* found it */ 1834 return (1); 1835 } 1836 break; 1837 } 1838 #ifdef INET6 1839 case AF_INET6: 1840 { 1841 struct sockaddr_in6 *sin6, *rsin6; 1842 1843 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1844 rsin6 = (struct sockaddr_in6 *)to; 1845 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1846 rsin6)) { 1847 /* Update the endpoint pointer */ 1848 return (1); 1849 } 1850 break; 1851 } 1852 #endif 1853 default: 1854 /* TSNH */ 1855 break; 1856 } 1857 } 1858 /* Nope, do not have the address ;-( */ 1859 return (0); 1860 } 1861 1862 static struct sctp_tcb * 1863 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 1864 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 1865 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 1866 { 1867 /* 1868 * Use my vtag to hash. If we find it we then verify the source addr 1869 * is in the assoc. If all goes well we save a bit on rec of a 1870 * packet. 1871 */ 1872 struct sctpasochead *head; 1873 struct sctp_nets *net; 1874 struct sctp_tcb *stcb; 1875 1876 *netp = NULL; 1877 *inp_p = NULL; 1878 SCTP_INP_INFO_RLOCK(); 1879 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 1880 SCTP_BASE_INFO(hashasocmark))]; 1881 if (head == NULL) { 1882 /* invalid vtag */ 1883 SCTP_INP_INFO_RUNLOCK(); 1884 return (NULL); 1885 } 1886 LIST_FOREACH(stcb, head, sctp_asocs) { 1887 SCTP_INP_RLOCK(stcb->sctp_ep); 1888 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1889 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1890 continue; 1891 } 1892 SCTP_TCB_LOCK(stcb); 1893 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1894 if (stcb->asoc.my_vtag == vtag) { 1895 /* candidate */ 1896 if (stcb->rport != rport) { 1897 SCTP_TCB_UNLOCK(stcb); 1898 continue; 1899 } 1900 if (stcb->sctp_ep->sctp_lport != lport) { 1901 SCTP_TCB_UNLOCK(stcb); 1902 continue; 1903 } 1904 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1905 SCTP_TCB_UNLOCK(stcb); 1906 continue; 1907 } 1908 /* RRS:Need toaddr check here */ 1909 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 1910 /* Endpoint does not own this address */ 1911 SCTP_TCB_UNLOCK(stcb); 1912 continue; 1913 } 1914 if (remote_tag) { 1915 /* 1916 * If we have both vtags thats all we match 1917 * on 1918 */ 1919 if (stcb->asoc.peer_vtag == remote_tag) { 1920 /* 1921 * If both tags match we consider it 1922 * conclusive and check NO 1923 * source/destination addresses 1924 */ 1925 goto conclusive; 1926 } 1927 } 1928 if (skip_src_check) { 1929 conclusive: 1930 if (from) { 1931 net = sctp_findnet(stcb, from); 1932 } else { 1933 *netp = NULL; /* unknown */ 1934 } 1935 if (inp_p) 1936 *inp_p = stcb->sctp_ep; 1937 SCTP_INP_INFO_RUNLOCK(); 1938 return (stcb); 1939 } 1940 net = sctp_findnet(stcb, from); 1941 if (net) { 1942 /* yep its him. */ 1943 *netp = net; 1944 SCTP_STAT_INCR(sctps_vtagexpress); 1945 *inp_p = stcb->sctp_ep; 1946 SCTP_INP_INFO_RUNLOCK(); 1947 return (stcb); 1948 } else { 1949 /* 1950 * not him, this should only happen in rare 1951 * cases so I peg it. 1952 */ 1953 SCTP_STAT_INCR(sctps_vtagbogus); 1954 } 1955 } 1956 SCTP_TCB_UNLOCK(stcb); 1957 } 1958 SCTP_INP_INFO_RUNLOCK(); 1959 return (NULL); 1960 } 1961 1962 /* 1963 * Find an association with the pointer to the inbound IP packet. This can be 1964 * a IPv4 or IPv6 packet. 1965 */ 1966 struct sctp_tcb * 1967 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 1968 struct sctphdr *sh, struct sctp_chunkhdr *ch, 1969 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 1970 { 1971 int find_tcp_pool; 1972 struct ip *iph; 1973 struct sctp_tcb *retval; 1974 struct sockaddr_storage to_store, from_store; 1975 struct sockaddr *to = (struct sockaddr *)&to_store; 1976 struct sockaddr *from = (struct sockaddr *)&from_store; 1977 struct sctp_inpcb *inp; 1978 1979 iph = mtod(m, struct ip *); 1980 switch (iph->ip_v) { 1981 case IPVERSION: 1982 { 1983 /* its IPv4 */ 1984 struct sockaddr_in *from4; 1985 1986 from4 = (struct sockaddr_in *)&from_store; 1987 bzero(from4, sizeof(*from4)); 1988 from4->sin_family = AF_INET; 1989 from4->sin_len = sizeof(struct sockaddr_in); 1990 from4->sin_addr.s_addr = iph->ip_src.s_addr; 1991 from4->sin_port = sh->src_port; 1992 break; 1993 } 1994 #ifdef INET6 1995 case IPV6_VERSION >> 4: 1996 { 1997 /* its IPv6 */ 1998 struct ip6_hdr *ip6; 1999 struct sockaddr_in6 *from6; 2000 2001 ip6 = mtod(m, struct ip6_hdr *); 2002 from6 = (struct sockaddr_in6 *)&from_store; 2003 bzero(from6, sizeof(*from6)); 2004 from6->sin6_family = AF_INET6; 2005 from6->sin6_len = sizeof(struct sockaddr_in6); 2006 from6->sin6_addr = ip6->ip6_src; 2007 from6->sin6_port = sh->src_port; 2008 /* Get the scopes in properly to the sin6 addr's */ 2009 /* we probably don't need these operations */ 2010 (void)sa6_recoverscope(from6); 2011 sa6_embedscope(from6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)); 2012 break; 2013 } 2014 #endif 2015 default: 2016 /* Currently not supported. */ 2017 return (NULL); 2018 } 2019 2020 2021 switch (iph->ip_v) { 2022 case IPVERSION: 2023 { 2024 /* its IPv4 */ 2025 struct sockaddr_in *to4; 2026 2027 to4 = (struct sockaddr_in *)&to_store; 2028 bzero(to4, sizeof(*to4)); 2029 to4->sin_family = AF_INET; 2030 to4->sin_len = sizeof(struct sockaddr_in); 2031 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 2032 to4->sin_port = sh->dest_port; 2033 break; 2034 } 2035 #ifdef INET6 2036 case IPV6_VERSION >> 4: 2037 { 2038 /* its IPv6 */ 2039 struct ip6_hdr *ip6; 2040 struct sockaddr_in6 *to6; 2041 2042 ip6 = mtod(m, struct ip6_hdr *); 2043 to6 = (struct sockaddr_in6 *)&to_store; 2044 bzero(to6, sizeof(*to6)); 2045 to6->sin6_family = AF_INET6; 2046 to6->sin6_len = sizeof(struct sockaddr_in6); 2047 to6->sin6_addr = ip6->ip6_dst; 2048 to6->sin6_port = sh->dest_port; 2049 /* Get the scopes in properly to the sin6 addr's */ 2050 /* we probably don't need these operations */ 2051 (void)sa6_recoverscope(to6); 2052 sa6_embedscope(to6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)); 2053 break; 2054 } 2055 #endif 2056 default: 2057 /* TSNH */ 2058 break; 2059 } 2060 if (sh->v_tag) { 2061 /* we only go down this path if vtag is non-zero */ 2062 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag), 2063 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2064 if (retval) { 2065 return (retval); 2066 } 2067 } 2068 find_tcp_pool = 0; 2069 if ((ch->chunk_type != SCTP_INITIATION) && 2070 (ch->chunk_type != SCTP_INITIATION_ACK) && 2071 (ch->chunk_type != SCTP_COOKIE_ACK) && 2072 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2073 /* Other chunk types go to the tcp pool. */ 2074 find_tcp_pool = 1; 2075 } 2076 if (inp_p) { 2077 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 2078 find_tcp_pool, vrf_id); 2079 inp = *inp_p; 2080 } else { 2081 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 2082 find_tcp_pool, vrf_id); 2083 } 2084 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2085 if (retval == NULL && inp) { 2086 /* Found a EP but not this address */ 2087 if ((ch->chunk_type == SCTP_INITIATION) || 2088 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2089 /*- 2090 * special hook, we do NOT return linp or an 2091 * association that is linked to an existing 2092 * association that is under the TCP pool (i.e. no 2093 * listener exists). The endpoint finding routine 2094 * will always find a listner before examining the 2095 * TCP pool. 2096 */ 2097 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2098 if (inp_p) { 2099 *inp_p = NULL; 2100 } 2101 return (NULL); 2102 } 2103 retval = sctp_findassociation_special_addr(m, iphlen, 2104 offset, sh, &inp, netp, to); 2105 if (inp_p != NULL) { 2106 *inp_p = inp; 2107 } 2108 } 2109 } 2110 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2111 return (retval); 2112 } 2113 2114 /* 2115 * lookup an association by an ASCONF lookup address. 2116 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2117 */ 2118 struct sctp_tcb * 2119 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 2120 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2121 { 2122 struct sctp_tcb *stcb; 2123 struct sockaddr_in *sin; 2124 2125 #ifdef INET6 2126 struct sockaddr_in6 *sin6; 2127 2128 #endif 2129 struct sockaddr_storage local_store, remote_store; 2130 struct sockaddr *to; 2131 struct ip *iph; 2132 2133 #ifdef INET6 2134 struct ip6_hdr *ip6; 2135 2136 #endif 2137 struct sctp_paramhdr parm_buf, *phdr; 2138 int ptype; 2139 int zero_address = 0; 2140 2141 2142 memset(&local_store, 0, sizeof(local_store)); 2143 memset(&remote_store, 0, sizeof(remote_store)); 2144 to = (struct sockaddr *)&local_store; 2145 /* First get the destination address setup too. */ 2146 iph = mtod(m, struct ip *); 2147 switch (iph->ip_v) { 2148 case IPVERSION: 2149 /* its IPv4 */ 2150 sin = (struct sockaddr_in *)&local_store; 2151 sin->sin_family = AF_INET; 2152 sin->sin_len = sizeof(*sin); 2153 sin->sin_port = sh->dest_port; 2154 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 2155 break; 2156 #ifdef INET6 2157 case IPV6_VERSION >> 4: 2158 /* its IPv6 */ 2159 ip6 = mtod(m, struct ip6_hdr *); 2160 sin6 = (struct sockaddr_in6 *)&local_store; 2161 sin6->sin6_family = AF_INET6; 2162 sin6->sin6_len = sizeof(*sin6); 2163 sin6->sin6_port = sh->dest_port; 2164 sin6->sin6_addr = ip6->ip6_dst; 2165 break; 2166 #endif 2167 default: 2168 return NULL; 2169 } 2170 2171 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2172 &parm_buf, sizeof(struct sctp_paramhdr)); 2173 if (phdr == NULL) { 2174 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2175 __FUNCTION__); 2176 return NULL; 2177 } 2178 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2179 /* get the correlation address */ 2180 switch (ptype) { 2181 #ifdef INET6 2182 case SCTP_IPV6_ADDRESS: 2183 { 2184 /* ipv6 address param */ 2185 struct sctp_ipv6addr_param *p6, p6_buf; 2186 2187 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2188 return NULL; 2189 } 2190 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2191 offset + sizeof(struct sctp_asconf_chunk), 2192 &p6_buf.ph, sizeof(*p6)); 2193 if (p6 == NULL) { 2194 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2195 __FUNCTION__); 2196 return (NULL); 2197 } 2198 sin6 = (struct sockaddr_in6 *)&remote_store; 2199 sin6->sin6_family = AF_INET6; 2200 sin6->sin6_len = sizeof(*sin6); 2201 sin6->sin6_port = sh->src_port; 2202 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2203 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2204 zero_address = 1; 2205 break; 2206 } 2207 #endif 2208 case SCTP_IPV4_ADDRESS: 2209 { 2210 /* ipv4 address param */ 2211 struct sctp_ipv4addr_param *p4, p4_buf; 2212 2213 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2214 return NULL; 2215 } 2216 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2217 offset + sizeof(struct sctp_asconf_chunk), 2218 &p4_buf.ph, sizeof(*p4)); 2219 if (p4 == NULL) { 2220 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2221 __FUNCTION__); 2222 return (NULL); 2223 } 2224 sin = (struct sockaddr_in *)&remote_store; 2225 sin->sin_family = AF_INET; 2226 sin->sin_len = sizeof(*sin); 2227 sin->sin_port = sh->src_port; 2228 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2229 if (sin->sin_addr.s_addr == INADDR_ANY) 2230 zero_address = 1; 2231 break; 2232 } 2233 default: 2234 /* invalid address param type */ 2235 return NULL; 2236 } 2237 2238 if (zero_address) { 2239 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p, 2240 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2241 /* 2242 * printf("findassociation_ep_asconf: zero lookup address 2243 * finds stcb 0x%x\n", (uint32_t)stcb); 2244 */ 2245 } else { 2246 stcb = sctp_findassociation_ep_addr(inp_p, 2247 (struct sockaddr *)&remote_store, netp, 2248 to, NULL); 2249 } 2250 return (stcb); 2251 } 2252 2253 2254 /* 2255 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2256 * addresses. This way if we don't get a bind we by default pick a ephemeral 2257 * port with all addresses bound. 2258 */ 2259 int 2260 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2261 { 2262 /* 2263 * we get called when a new endpoint starts up. We need to allocate 2264 * the sctp_inpcb structure from the zone and init it. Mark it as 2265 * unbound and find a port that we can use as an ephemeral with 2266 * INADDR_ANY. If the user binds later no problem we can then add in 2267 * the specific addresses. And setup the default parameters for the 2268 * EP. 2269 */ 2270 int i, error; 2271 struct sctp_inpcb *inp; 2272 struct sctp_pcb *m; 2273 struct timeval time; 2274 sctp_sharedkey_t *null_key; 2275 2276 error = 0; 2277 2278 SCTP_INP_INFO_WLOCK(); 2279 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2280 if (inp == NULL) { 2281 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2282 SCTP_INP_INFO_WUNLOCK(); 2283 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2284 return (ENOBUFS); 2285 } 2286 /* zap it */ 2287 bzero(inp, sizeof(*inp)); 2288 2289 /* bump generations */ 2290 /* setup socket pointers */ 2291 inp->sctp_socket = so; 2292 inp->ip_inp.inp.inp_socket = so; 2293 inp->sctp_associd_counter = 1; 2294 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2295 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2296 /* init the small hash table we use to track asocid <-> tcb */ 2297 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2298 if (inp->sctp_asocidhash == NULL) { 2299 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2300 SCTP_INP_INFO_WUNLOCK(); 2301 return error; 2302 } 2303 #ifdef IPSEC 2304 { 2305 struct inpcbpolicy *pcb_sp = NULL; 2306 2307 error = ipsec_init_policy(so, &pcb_sp); 2308 /* Arrange to share the policy */ 2309 inp->ip_inp.inp.inp_sp = pcb_sp; 2310 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2311 } 2312 if (error != 0) { 2313 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2314 SCTP_INP_INFO_WUNLOCK(); 2315 return error; 2316 } 2317 #endif /* IPSEC */ 2318 SCTP_INCR_EP_COUNT(); 2319 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(MOD_INET, ip_defttl); 2320 SCTP_INP_INFO_WUNLOCK(); 2321 2322 so->so_pcb = (caddr_t)inp; 2323 2324 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 2325 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 2326 /* UDP style socket */ 2327 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2328 SCTP_PCB_FLAGS_UNBOUND); 2329 /* Be sure it is NON-BLOCKING IO for UDP */ 2330 /* SCTP_SET_SO_NBIO(so); */ 2331 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2332 /* TCP style socket */ 2333 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2334 SCTP_PCB_FLAGS_UNBOUND); 2335 /* Be sure we have blocking IO by default */ 2336 SCTP_CLEAR_SO_NBIO(so); 2337 } else { 2338 /* 2339 * unsupported socket type (RAW, etc)- in case we missed it 2340 * in protosw 2341 */ 2342 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2343 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2344 return (EOPNOTSUPP); 2345 } 2346 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2347 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2348 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2349 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2350 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2351 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2352 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2353 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2354 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2355 } 2356 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2357 &inp->sctp_hashmark); 2358 if (inp->sctp_tcbhash == NULL) { 2359 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2360 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2361 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2362 return (ENOBUFS); 2363 } 2364 inp->def_vrf_id = vrf_id; 2365 2366 SCTP_INP_INFO_WLOCK(); 2367 SCTP_INP_LOCK_INIT(inp); 2368 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2369 SCTP_INP_READ_INIT(inp); 2370 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2371 /* lock the new ep */ 2372 SCTP_INP_WLOCK(inp); 2373 2374 /* add it to the info area */ 2375 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2376 SCTP_INP_INFO_WUNLOCK(); 2377 2378 TAILQ_INIT(&inp->read_queue); 2379 LIST_INIT(&inp->sctp_addr_list); 2380 2381 LIST_INIT(&inp->sctp_asoc_list); 2382 2383 #ifdef SCTP_TRACK_FREED_ASOCS 2384 /* TEMP CODE */ 2385 LIST_INIT(&inp->sctp_asoc_free_list); 2386 #endif 2387 /* Init the timer structure for signature change */ 2388 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2389 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2390 2391 /* now init the actual endpoint default data */ 2392 m = &inp->sctp_ep; 2393 2394 /* setup the base timeout information */ 2395 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2396 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2397 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2398 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2399 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2400 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2401 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2402 /* all max/min max are in ms */ 2403 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2404 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2405 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2406 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2407 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2408 2409 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2410 2411 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2412 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2413 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2414 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2415 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2416 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2417 if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) && 2418 (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) { 2419 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2420 } else { 2421 /* sysctl done with invalid value, set to 2581 */ 2422 m->sctp_default_cc_module = SCTP_CC_RFC2581; 2423 } 2424 /* number of streams to pre-open on a association */ 2425 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2426 2427 /* Add adaptation cookie */ 2428 m->adaptation_layer_indicator = 0x504C5253; 2429 2430 /* seed random number generator */ 2431 m->random_counter = 1; 2432 m->store_at = SCTP_SIGNATURE_SIZE; 2433 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2434 sctp_fill_random_store(m); 2435 2436 /* Minimum cookie size */ 2437 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2438 sizeof(struct sctp_state_cookie); 2439 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2440 2441 /* Setup the initial secret */ 2442 (void)SCTP_GETTIME_TIMEVAL(&time); 2443 m->time_of_secret_change = time.tv_sec; 2444 2445 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2446 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2447 } 2448 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2449 2450 /* How long is a cookie good for ? */ 2451 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2452 /* 2453 * Initialize authentication parameters 2454 */ 2455 m->local_hmacs = sctp_default_supported_hmaclist(); 2456 m->local_auth_chunks = sctp_alloc_chunklist(); 2457 sctp_auth_set_default_chunks(m->local_auth_chunks); 2458 LIST_INIT(&m->shared_keys); 2459 /* add default NULL key as key id 0 */ 2460 null_key = sctp_alloc_sharedkey(); 2461 sctp_insert_sharedkey(&m->shared_keys, null_key); 2462 SCTP_INP_WUNLOCK(inp); 2463 #ifdef SCTP_LOG_CLOSING 2464 sctp_log_closing(inp, NULL, 12); 2465 #endif 2466 return (error); 2467 } 2468 2469 2470 void 2471 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2472 struct sctp_tcb *stcb) 2473 { 2474 struct sctp_nets *net; 2475 uint16_t lport, rport; 2476 struct sctppcbhead *head; 2477 struct sctp_laddr *laddr, *oladdr; 2478 2479 atomic_add_int(&stcb->asoc.refcnt, 1); 2480 SCTP_TCB_UNLOCK(stcb); 2481 SCTP_INP_INFO_WLOCK(); 2482 SCTP_INP_WLOCK(old_inp); 2483 SCTP_INP_WLOCK(new_inp); 2484 SCTP_TCB_LOCK(stcb); 2485 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2486 2487 new_inp->sctp_ep.time_of_secret_change = 2488 old_inp->sctp_ep.time_of_secret_change; 2489 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2490 sizeof(old_inp->sctp_ep.secret_key)); 2491 new_inp->sctp_ep.current_secret_number = 2492 old_inp->sctp_ep.current_secret_number; 2493 new_inp->sctp_ep.last_secret_number = 2494 old_inp->sctp_ep.last_secret_number; 2495 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2496 2497 /* make it so new data pours into the new socket */ 2498 stcb->sctp_socket = new_inp->sctp_socket; 2499 stcb->sctp_ep = new_inp; 2500 2501 /* Copy the port across */ 2502 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2503 rport = stcb->rport; 2504 /* Pull the tcb from the old association */ 2505 LIST_REMOVE(stcb, sctp_tcbhash); 2506 LIST_REMOVE(stcb, sctp_tcblist); 2507 2508 /* Now insert the new_inp into the TCP connected hash */ 2509 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), 2510 SCTP_BASE_INFO(hashtcpmark))]; 2511 2512 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2513 /* Its safe to access */ 2514 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2515 2516 /* Now move the tcb into the endpoint list */ 2517 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2518 /* 2519 * Question, do we even need to worry about the ep-hash since we 2520 * only have one connection? Probably not :> so lets get rid of it 2521 * and not suck up any kernel memory in that. 2522 */ 2523 2524 /* Ok. Let's restart timer. */ 2525 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2526 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2527 stcb, net); 2528 } 2529 2530 SCTP_INP_INFO_WUNLOCK(); 2531 if (new_inp->sctp_tcbhash != NULL) { 2532 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2533 new_inp->sctp_tcbhash = NULL; 2534 } 2535 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2536 /* Subset bound, so copy in the laddr list from the old_inp */ 2537 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2538 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2539 if (laddr == NULL) { 2540 /* 2541 * Gak, what can we do? This assoc is really 2542 * HOSED. We probably should send an abort 2543 * here. 2544 */ 2545 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2546 continue; 2547 } 2548 SCTP_INCR_LADDR_COUNT(); 2549 bzero(laddr, sizeof(*laddr)); 2550 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2551 laddr->ifa = oladdr->ifa; 2552 atomic_add_int(&laddr->ifa->refcount, 1); 2553 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2554 sctp_nxt_addr); 2555 new_inp->laddr_count++; 2556 } 2557 } 2558 /* 2559 * Now any running timers need to be adjusted since we really don't 2560 * care if they are running or not just blast in the new_inp into 2561 * all of them. 2562 */ 2563 2564 stcb->asoc.hb_timer.ep = (void *)new_inp; 2565 stcb->asoc.dack_timer.ep = (void *)new_inp; 2566 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2567 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2568 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2569 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2570 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2571 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2572 /* now what about the nets? */ 2573 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2574 net->pmtu_timer.ep = (void *)new_inp; 2575 net->rxt_timer.ep = (void *)new_inp; 2576 net->fr_timer.ep = (void *)new_inp; 2577 } 2578 SCTP_INP_WUNLOCK(new_inp); 2579 SCTP_INP_WUNLOCK(old_inp); 2580 } 2581 2582 2583 2584 2585 /* sctp_ifap is used to bypass normal local address validation checks */ 2586 int 2587 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2588 struct sctp_ifa *sctp_ifap, struct thread *p) 2589 { 2590 /* bind a ep to a socket address */ 2591 struct sctppcbhead *head; 2592 struct sctp_inpcb *inp, *inp_tmp; 2593 struct inpcb *ip_inp; 2594 int port_reuse_active = 0; 2595 int bindall; 2596 uint16_t lport; 2597 int error; 2598 uint32_t vrf_id; 2599 2600 lport = 0; 2601 error = 0; 2602 bindall = 1; 2603 inp = (struct sctp_inpcb *)so->so_pcb; 2604 ip_inp = (struct inpcb *)so->so_pcb; 2605 #ifdef SCTP_DEBUG 2606 if (addr) { 2607 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2608 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2609 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2610 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2611 } 2612 #endif 2613 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2614 /* already did a bind, subsequent binds NOT allowed ! */ 2615 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2616 return (EINVAL); 2617 } 2618 #ifdef INVARIANTS 2619 if (p == NULL) 2620 panic("null proc/thread"); 2621 #endif 2622 if (addr != NULL) { 2623 switch (addr->sa_family) { 2624 case AF_INET: 2625 { 2626 struct sockaddr_in *sin; 2627 2628 /* IPV6_V6ONLY socket? */ 2629 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2630 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2631 return (EINVAL); 2632 } 2633 if (addr->sa_len != sizeof(*sin)) { 2634 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2635 return (EINVAL); 2636 } 2637 sin = (struct sockaddr_in *)addr; 2638 lport = sin->sin_port; 2639 /* 2640 * For LOOPBACK the prison_local_ip4() call 2641 * will transmute the ip address to the 2642 * proper value. 2643 */ 2644 if (p && prison_local_ip4(p->td_ucred, &sin->sin_addr) != 0) { 2645 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2646 return (EINVAL); 2647 } 2648 if (sin->sin_addr.s_addr != INADDR_ANY) { 2649 bindall = 0; 2650 } 2651 break; 2652 } 2653 #ifdef INET6 2654 case AF_INET6: 2655 { 2656 /* 2657 * Only for pure IPv6 Address. (No IPv4 2658 * Mapped!) 2659 */ 2660 struct sockaddr_in6 *sin6; 2661 2662 sin6 = (struct sockaddr_in6 *)addr; 2663 2664 if (addr->sa_len != sizeof(*sin6)) { 2665 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2666 return (EINVAL); 2667 } 2668 lport = sin6->sin6_port; 2669 2670 /* 2671 * For LOOPBACK the prison_local_ip6() call 2672 * will transmute the ipv6 address to the 2673 * proper value. 2674 */ 2675 if (p && prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2676 (SCTP_IPV6_V6ONLY(inp) != 0)) != 0) { 2677 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2678 return (EINVAL); 2679 } 2680 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2681 bindall = 0; 2682 /* KAME hack: embed scopeid */ 2683 if (sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)) != 0) { 2684 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2685 return (EINVAL); 2686 } 2687 } 2688 /* this must be cleared for ifa_ifwithaddr() */ 2689 sin6->sin6_scope_id = 0; 2690 break; 2691 } 2692 #endif 2693 default: 2694 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2695 return (EAFNOSUPPORT); 2696 } 2697 } 2698 SCTP_INP_INFO_WLOCK(); 2699 SCTP_INP_WLOCK(inp); 2700 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2701 vrf_id = inp->def_vrf_id; 2702 2703 /* increase our count due to the unlock we do */ 2704 SCTP_INP_INCR_REF(inp); 2705 if (lport) { 2706 /* 2707 * Did the caller specify a port? if so we must see if a ep 2708 * already has this one bound. 2709 */ 2710 /* got to be root to get at low ports */ 2711 if (ntohs(lport) < IPPORT_RESERVED) { 2712 if (p && (error = 2713 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2714 )) { 2715 SCTP_INP_DECR_REF(inp); 2716 SCTP_INP_WUNLOCK(inp); 2717 SCTP_INP_INFO_WUNLOCK(); 2718 return (error); 2719 } 2720 } 2721 if (p == NULL) { 2722 SCTP_INP_DECR_REF(inp); 2723 SCTP_INP_WUNLOCK(inp); 2724 SCTP_INP_INFO_WUNLOCK(); 2725 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2726 return (error); 2727 } 2728 SCTP_INP_WUNLOCK(inp); 2729 if (bindall) { 2730 vrf_id = inp->def_vrf_id; 2731 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2732 if (inp_tmp != NULL) { 2733 /* 2734 * lock guy returned and lower count note 2735 * that we are not bound so inp_tmp should 2736 * NEVER be inp. And it is this inp 2737 * (inp_tmp) that gets the reference bump, 2738 * so we must lower it. 2739 */ 2740 SCTP_INP_DECR_REF(inp_tmp); 2741 /* unlock info */ 2742 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2743 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2744 /* 2745 * Ok, must be one-2-one and 2746 * allowing port re-use 2747 */ 2748 port_reuse_active = 1; 2749 goto continue_anyway; 2750 } 2751 SCTP_INP_DECR_REF(inp); 2752 SCTP_INP_INFO_WUNLOCK(); 2753 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2754 return (EADDRINUSE); 2755 } 2756 } else { 2757 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2758 if (inp_tmp != NULL) { 2759 /* 2760 * lock guy returned and lower count note 2761 * that we are not bound so inp_tmp should 2762 * NEVER be inp. And it is this inp 2763 * (inp_tmp) that gets the reference bump, 2764 * so we must lower it. 2765 */ 2766 SCTP_INP_DECR_REF(inp_tmp); 2767 /* unlock info */ 2768 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2769 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2770 /* 2771 * Ok, must be one-2-one and 2772 * allowing port re-use 2773 */ 2774 port_reuse_active = 1; 2775 goto continue_anyway; 2776 } 2777 SCTP_INP_DECR_REF(inp); 2778 SCTP_INP_INFO_WUNLOCK(); 2779 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2780 return (EADDRINUSE); 2781 } 2782 } 2783 continue_anyway: 2784 SCTP_INP_WLOCK(inp); 2785 if (bindall) { 2786 /* verify that no lport is not used by a singleton */ 2787 if ((port_reuse_active == 0) && 2788 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2789 ) { 2790 /* Sorry someone already has this one bound */ 2791 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2792 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2793 port_reuse_active = 1; 2794 } else { 2795 SCTP_INP_DECR_REF(inp); 2796 SCTP_INP_WUNLOCK(inp); 2797 SCTP_INP_INFO_WUNLOCK(); 2798 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2799 return (EADDRINUSE); 2800 } 2801 } 2802 } 2803 } else { 2804 uint16_t first, last, candidate; 2805 uint16_t count; 2806 int done; 2807 2808 if (ip_inp->inp_flags & INP_HIGHPORT) { 2809 first = MODULE_GLOBAL(MOD_INET, ipport_hifirstauto); 2810 last = MODULE_GLOBAL(MOD_INET, ipport_hilastauto); 2811 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2812 if (p && (error = 2813 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2814 )) { 2815 SCTP_INP_DECR_REF(inp); 2816 SCTP_INP_WUNLOCK(inp); 2817 SCTP_INP_INFO_WUNLOCK(); 2818 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2819 return (error); 2820 } 2821 first = MODULE_GLOBAL(MOD_INET, ipport_lowfirstauto); 2822 last = MODULE_GLOBAL(MOD_INET, ipport_lowlastauto); 2823 } else { 2824 first = MODULE_GLOBAL(MOD_INET, ipport_firstauto); 2825 last = MODULE_GLOBAL(MOD_INET, ipport_lastauto); 2826 } 2827 if (first > last) { 2828 uint16_t temp; 2829 2830 temp = first; 2831 first = last; 2832 last = temp; 2833 } 2834 count = last - first + 1; /* number of candidates */ 2835 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2836 2837 done = 0; 2838 while (!done) { 2839 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2840 done = 1; 2841 } 2842 if (!done) { 2843 if (--count == 0) { 2844 SCTP_INP_DECR_REF(inp); 2845 SCTP_INP_WUNLOCK(inp); 2846 SCTP_INP_INFO_WUNLOCK(); 2847 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2848 return (EADDRINUSE); 2849 } 2850 if (candidate == last) 2851 candidate = first; 2852 else 2853 candidate = candidate + 1; 2854 } 2855 } 2856 lport = htons(candidate); 2857 } 2858 SCTP_INP_DECR_REF(inp); 2859 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2860 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2861 /* 2862 * this really should not happen. The guy did a non-blocking 2863 * bind and then did a close at the same time. 2864 */ 2865 SCTP_INP_WUNLOCK(inp); 2866 SCTP_INP_INFO_WUNLOCK(); 2867 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2868 return (EINVAL); 2869 } 2870 /* ok we look clear to give out this port, so lets setup the binding */ 2871 if (bindall) { 2872 /* binding to all addresses, so just set in the proper flags */ 2873 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2874 /* set the automatic addr changes from kernel flag */ 2875 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2876 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2877 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2878 } else { 2879 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2880 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2881 } 2882 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2883 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2884 } else { 2885 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2886 } 2887 /* 2888 * set the automatic mobility_base from kernel flag (by 2889 * micchie) 2890 */ 2891 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 2892 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 2893 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2894 } else { 2895 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 2896 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2897 } 2898 /* 2899 * set the automatic mobility_fasthandoff from kernel flag 2900 * (by micchie) 2901 */ 2902 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 2903 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 2904 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2905 } else { 2906 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 2907 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2908 } 2909 } else { 2910 /* 2911 * bind specific, make sure flags is off and add a new 2912 * address structure to the sctp_addr_list inside the ep 2913 * structure. 2914 * 2915 * We will need to allocate one and insert it at the head. The 2916 * socketopt call can just insert new addresses in there as 2917 * well. It will also have to do the embed scope kame hack 2918 * too (before adding). 2919 */ 2920 struct sctp_ifa *ifa; 2921 struct sockaddr_storage store_sa; 2922 2923 memset(&store_sa, 0, sizeof(store_sa)); 2924 if (addr->sa_family == AF_INET) { 2925 struct sockaddr_in *sin; 2926 2927 sin = (struct sockaddr_in *)&store_sa; 2928 memcpy(sin, addr, sizeof(struct sockaddr_in)); 2929 sin->sin_port = 0; 2930 } else if (addr->sa_family == AF_INET6) { 2931 struct sockaddr_in6 *sin6; 2932 2933 sin6 = (struct sockaddr_in6 *)&store_sa; 2934 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 2935 sin6->sin6_port = 0; 2936 } 2937 /* 2938 * first find the interface with the bound address need to 2939 * zero out the port to find the address! yuck! can't do 2940 * this earlier since need port for sctp_pcb_findep() 2941 */ 2942 if (sctp_ifap != NULL) 2943 ifa = sctp_ifap; 2944 else { 2945 /* 2946 * Note for BSD we hit here always other O/S's will 2947 * pass things in via the sctp_ifap argument 2948 * (Panda). 2949 */ 2950 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 2951 vrf_id, SCTP_ADDR_NOT_LOCKED); 2952 } 2953 if (ifa == NULL) { 2954 /* Can't find an interface with that address */ 2955 SCTP_INP_WUNLOCK(inp); 2956 SCTP_INP_INFO_WUNLOCK(); 2957 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 2958 return (EADDRNOTAVAIL); 2959 } 2960 if (addr->sa_family == AF_INET6) { 2961 /* GAK, more FIXME IFA lock? */ 2962 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2963 /* Can't bind a non-existent addr. */ 2964 SCTP_INP_WUNLOCK(inp); 2965 SCTP_INP_INFO_WUNLOCK(); 2966 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2967 return (EINVAL); 2968 } 2969 } 2970 /* we're not bound all */ 2971 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 2972 /* allow bindx() to send ASCONF's for binding changes */ 2973 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2974 /* clear automatic addr changes from kernel flag */ 2975 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2976 2977 /* add this address to the endpoint list */ 2978 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 2979 if (error != 0) { 2980 SCTP_INP_WUNLOCK(inp); 2981 SCTP_INP_INFO_WUNLOCK(); 2982 return (error); 2983 } 2984 inp->laddr_count++; 2985 } 2986 /* find the bucket */ 2987 if (port_reuse_active) { 2988 /* Put it into tcp 1-2-1 hash */ 2989 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), 2990 SCTP_BASE_INFO(hashtcpmark))]; 2991 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 2992 } else { 2993 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 2994 SCTP_BASE_INFO(hashmark))]; 2995 } 2996 /* put it in the bucket */ 2997 LIST_INSERT_HEAD(head, inp, sctp_hash); 2998 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 2999 head, ntohs(lport), port_reuse_active); 3000 /* set in the port */ 3001 inp->sctp_lport = lport; 3002 3003 /* turn off just the unbound flag */ 3004 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3005 SCTP_INP_WUNLOCK(inp); 3006 SCTP_INP_INFO_WUNLOCK(); 3007 return (0); 3008 } 3009 3010 3011 static void 3012 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next) 3013 { 3014 struct sctp_iterator *it; 3015 3016 /* 3017 * We enter with the only the ITERATOR_LOCK in place and a write 3018 * lock on the inp_info stuff. 3019 */ 3020 3021 /* 3022 * Go through all iterators, we must do this since it is possible 3023 * that some iterator does NOT have the lock, but is waiting for it. 3024 * And the one that had the lock has either moved in the last 3025 * iteration or we just cleared it above. We need to find all of 3026 * those guys. The list of iterators should never be very big 3027 * though. 3028 */ 3029 TAILQ_FOREACH(it, &SCTP_BASE_INFO(iteratorhead), sctp_nxt_itr) { 3030 if (it == inp->inp_starting_point_for_iterator) 3031 /* skip this guy, he's special */ 3032 continue; 3033 if (it->inp == inp) { 3034 /* 3035 * This is tricky and we DON'T lock the iterator. 3036 * Reason is he's running but waiting for me since 3037 * inp->inp_starting_point_for_iterator has the lock 3038 * on me (the guy above we skipped). This tells us 3039 * its is not running but waiting for 3040 * inp->inp_starting_point_for_iterator to be 3041 * released by the guy that does have our INP in a 3042 * lock. 3043 */ 3044 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3045 it->inp = NULL; 3046 it->stcb = NULL; 3047 } else { 3048 /* set him up to do the next guy not me */ 3049 it->inp = inp_next; 3050 it->stcb = NULL; 3051 } 3052 } 3053 } 3054 it = inp->inp_starting_point_for_iterator; 3055 if (it) { 3056 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3057 it->inp = NULL; 3058 } else { 3059 it->inp = inp_next; 3060 } 3061 it->stcb = NULL; 3062 } 3063 } 3064 3065 /* release sctp_inpcb unbind the port */ 3066 void 3067 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3068 { 3069 /* 3070 * Here we free a endpoint. We must find it (if it is in the Hash 3071 * table) and remove it from there. Then we must also find it in the 3072 * overall list and remove it from there. After all removals are 3073 * complete then any timer has to be stopped. Then start the actual 3074 * freeing. a) Any local lists. b) Any associations. c) The hash of 3075 * all associations. d) finally the ep itself. 3076 */ 3077 struct sctp_pcb *m; 3078 struct sctp_inpcb *inp_save; 3079 struct sctp_tcb *asoc, *nasoc; 3080 struct sctp_laddr *laddr, *nladdr; 3081 struct inpcb *ip_pcb; 3082 struct socket *so; 3083 3084 struct sctp_queued_to_read *sq; 3085 3086 3087 int cnt; 3088 sctp_sharedkey_t *shared_key; 3089 3090 3091 #ifdef SCTP_LOG_CLOSING 3092 sctp_log_closing(inp, NULL, 0); 3093 #endif 3094 SCTP_ITERATOR_LOCK(); 3095 so = inp->sctp_socket; 3096 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3097 /* been here before.. eeks.. get out of here */ 3098 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3099 SCTP_ITERATOR_UNLOCK(); 3100 #ifdef SCTP_LOG_CLOSING 3101 sctp_log_closing(inp, NULL, 1); 3102 #endif 3103 return; 3104 } 3105 SCTP_ASOC_CREATE_LOCK(inp); 3106 SCTP_INP_INFO_WLOCK(); 3107 3108 SCTP_INP_WLOCK(inp); 3109 /* First time through we have the socket lock, after that no more. */ 3110 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3111 /* 3112 * Once we are in we can remove the flag from = 1 is only 3113 * passed from the actual closing routines that are called 3114 * via the sockets layer. 3115 */ 3116 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3117 /* socket is gone, so no more wakeups allowed */ 3118 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3119 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3120 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3121 } 3122 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3123 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3124 3125 if (inp->control) { 3126 sctp_m_freem(inp->control); 3127 inp->control = NULL; 3128 } 3129 if (inp->pkt) { 3130 sctp_m_freem(inp->pkt); 3131 inp->pkt = NULL; 3132 } 3133 m = &inp->sctp_ep; 3134 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3135 * here but I will be nice :> (i.e. 3136 * ip_pcb = ep;) */ 3137 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3138 int cnt_in_sd; 3139 3140 cnt_in_sd = 0; 3141 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 3142 asoc = nasoc) { 3143 SCTP_TCB_LOCK(asoc); 3144 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3145 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3146 /* Skip guys being freed */ 3147 /* asoc->sctp_socket = NULL; FIXME MT */ 3148 cnt_in_sd++; 3149 SCTP_TCB_UNLOCK(asoc); 3150 continue; 3151 } 3152 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3153 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 3154 /* 3155 * If we have data in queue, we don't want 3156 * to just free since the app may have done, 3157 * send()/close or connect/send/close. And 3158 * it wants the data to get across first. 3159 */ 3160 /* Just abandon things in the front states */ 3161 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3162 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3163 cnt_in_sd++; 3164 } 3165 continue; 3166 } 3167 /* Disconnect the socket please */ 3168 asoc->sctp_socket = NULL; 3169 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3170 if ((asoc->asoc.size_on_reasm_queue > 0) || 3171 (asoc->asoc.control_pdapi) || 3172 (asoc->asoc.size_on_all_streams > 0) || 3173 (so && (so->so_rcv.sb_cc > 0)) 3174 ) { 3175 /* Left with Data unread */ 3176 struct mbuf *op_err; 3177 3178 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3179 0, M_DONTWAIT, 1, MT_DATA); 3180 if (op_err) { 3181 /* Fill in the user initiated abort */ 3182 struct sctp_paramhdr *ph; 3183 uint32_t *ippp; 3184 3185 SCTP_BUF_LEN(op_err) = 3186 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3187 ph = mtod(op_err, 3188 struct sctp_paramhdr *); 3189 ph->param_type = htons( 3190 SCTP_CAUSE_USER_INITIATED_ABT); 3191 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3192 ippp = (uint32_t *) (ph + 1); 3193 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3194 } 3195 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3196 #if defined(SCTP_PANIC_ON_ABORT) 3197 panic("inpcb_free does an abort"); 3198 #endif 3199 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3200 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3201 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3202 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3203 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3204 } 3205 if (sctp_free_assoc(inp, asoc, 3206 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3207 cnt_in_sd++; 3208 } 3209 continue; 3210 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3211 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3212 (asoc->asoc.stream_queue_cnt == 0) 3213 ) { 3214 if (asoc->asoc.locked_on_sending) { 3215 goto abort_anyway; 3216 } 3217 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3218 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3219 /* 3220 * there is nothing queued to send, 3221 * so I send shutdown 3222 */ 3223 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 3224 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3225 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3226 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3227 } 3228 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3229 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3230 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3231 asoc->asoc.primary_destination); 3232 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3233 asoc->asoc.primary_destination); 3234 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3235 } 3236 } else { 3237 /* mark into shutdown pending */ 3238 struct sctp_stream_queue_pending *sp; 3239 3240 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3241 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3242 asoc->asoc.primary_destination); 3243 if (asoc->asoc.locked_on_sending) { 3244 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3245 sctp_streamhead); 3246 if (sp == NULL) { 3247 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3248 asoc->asoc.locked_on_sending, 3249 asoc->asoc.locked_on_sending->stream_no); 3250 } else { 3251 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3252 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3253 } 3254 } 3255 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3256 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3257 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3258 struct mbuf *op_err; 3259 3260 abort_anyway: 3261 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3262 0, M_DONTWAIT, 1, MT_DATA); 3263 if (op_err) { 3264 /* 3265 * Fill in the user 3266 * initiated abort 3267 */ 3268 struct sctp_paramhdr *ph; 3269 uint32_t *ippp; 3270 3271 SCTP_BUF_LEN(op_err) = 3272 (sizeof(struct sctp_paramhdr) + 3273 sizeof(uint32_t)); 3274 ph = mtod(op_err, 3275 struct sctp_paramhdr *); 3276 ph->param_type = htons( 3277 SCTP_CAUSE_USER_INITIATED_ABT); 3278 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3279 ippp = (uint32_t *) (ph + 1); 3280 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3281 } 3282 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3283 #if defined(SCTP_PANIC_ON_ABORT) 3284 panic("inpcb_free does an abort"); 3285 #endif 3286 3287 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3288 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3289 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3290 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3291 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3292 } 3293 if (sctp_free_assoc(inp, asoc, 3294 SCTP_PCBFREE_NOFORCE, 3295 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3296 cnt_in_sd++; 3297 } 3298 continue; 3299 } else { 3300 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3301 } 3302 } 3303 cnt_in_sd++; 3304 SCTP_TCB_UNLOCK(asoc); 3305 } 3306 /* now is there some left in our SHUTDOWN state? */ 3307 if (cnt_in_sd) { 3308 SCTP_INP_WUNLOCK(inp); 3309 SCTP_ASOC_CREATE_UNLOCK(inp); 3310 SCTP_INP_INFO_WUNLOCK(); 3311 SCTP_ITERATOR_UNLOCK(); 3312 #ifdef SCTP_LOG_CLOSING 3313 sctp_log_closing(inp, NULL, 2); 3314 #endif 3315 inp->sctp_socket = NULL; 3316 return; 3317 } 3318 } 3319 inp->sctp_socket = NULL; 3320 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3321 SCTP_PCB_FLAGS_UNBOUND) { 3322 /* 3323 * ok, this guy has been bound. It's port is somewhere in 3324 * the SCTP_BASE_INFO(hash table). Remove it! 3325 */ 3326 LIST_REMOVE(inp, sctp_hash); 3327 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3328 } 3329 /* 3330 * If there is a timer running to kill us, forget it, since it may 3331 * have a contest on the INP lock.. which would cause us to die ... 3332 */ 3333 cnt = 0; 3334 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 3335 asoc = nasoc) { 3336 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3337 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3338 cnt++; 3339 continue; 3340 } 3341 /* Free associations that are NOT killing us */ 3342 SCTP_TCB_LOCK(asoc); 3343 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3344 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3345 struct mbuf *op_err; 3346 uint32_t *ippp; 3347 3348 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3349 0, M_DONTWAIT, 1, MT_DATA); 3350 if (op_err) { 3351 /* Fill in the user initiated abort */ 3352 struct sctp_paramhdr *ph; 3353 3354 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3355 sizeof(uint32_t)); 3356 ph = mtod(op_err, struct sctp_paramhdr *); 3357 ph->param_type = htons( 3358 SCTP_CAUSE_USER_INITIATED_ABT); 3359 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3360 ippp = (uint32_t *) (ph + 1); 3361 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3362 3363 } 3364 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3365 #if defined(SCTP_PANIC_ON_ABORT) 3366 panic("inpcb_free does an abort"); 3367 #endif 3368 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3369 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3370 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3371 cnt++; 3372 SCTP_TCB_UNLOCK(asoc); 3373 continue; 3374 } 3375 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3376 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3377 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3378 } 3379 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3380 cnt++; 3381 } 3382 } 3383 if (cnt) { 3384 /* Ok we have someone out there that will kill us */ 3385 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3386 SCTP_INP_WUNLOCK(inp); 3387 SCTP_ASOC_CREATE_UNLOCK(inp); 3388 SCTP_INP_INFO_WUNLOCK(); 3389 SCTP_ITERATOR_UNLOCK(); 3390 #ifdef SCTP_LOG_CLOSING 3391 sctp_log_closing(inp, NULL, 3); 3392 #endif 3393 return; 3394 } 3395 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3396 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3397 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3398 SCTP_INP_WUNLOCK(inp); 3399 SCTP_ASOC_CREATE_UNLOCK(inp); 3400 SCTP_INP_INFO_WUNLOCK(); 3401 SCTP_ITERATOR_UNLOCK(); 3402 #ifdef SCTP_LOG_CLOSING 3403 sctp_log_closing(inp, NULL, 4); 3404 #endif 3405 return; 3406 } 3407 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3408 inp->sctp_ep.signature_change.type = 0; 3409 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3410 3411 #ifdef SCTP_LOG_CLOSING 3412 sctp_log_closing(inp, NULL, 5); 3413 #endif 3414 3415 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3416 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE; 3417 /* Clear the read queue */ 3418 if ((inp->sctp_asocidhash) != NULL) { 3419 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3420 inp->sctp_asocidhash = NULL; 3421 } 3422 /* sa_ignore FREED_MEMORY */ 3423 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { 3424 /* Its only abandoned if it had data left */ 3425 if (sq->length) 3426 SCTP_STAT_INCR(sctps_left_abandon); 3427 3428 TAILQ_REMOVE(&inp->read_queue, sq, next); 3429 sctp_free_remote_addr(sq->whoFrom); 3430 if (so) 3431 so->so_rcv.sb_cc -= sq->length; 3432 if (sq->data) { 3433 sctp_m_freem(sq->data); 3434 sq->data = NULL; 3435 } 3436 /* 3437 * no need to free the net count, since at this point all 3438 * assoc's are gone. 3439 */ 3440 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3441 SCTP_DECR_READQ_COUNT(); 3442 } 3443 /* Now the sctp_pcb things */ 3444 /* 3445 * free each asoc if it is not already closed/free. we can't use the 3446 * macro here since le_next will get freed as part of the 3447 * sctp_free_assoc() call. 3448 */ 3449 cnt = 0; 3450 if (so) { 3451 #ifdef IPSEC 3452 ipsec_delete_pcbpolicy(ip_pcb); 3453 #endif /* IPSEC */ 3454 3455 /* Unlocks not needed since the socket is gone now */ 3456 } 3457 if (ip_pcb->inp_options) { 3458 (void)sctp_m_free(ip_pcb->inp_options); 3459 ip_pcb->inp_options = 0; 3460 } 3461 if (ip_pcb->inp_moptions) { 3462 inp_freemoptions(ip_pcb->inp_moptions); 3463 ip_pcb->inp_moptions = 0; 3464 } 3465 #ifdef INET6 3466 if (ip_pcb->inp_vflag & INP_IPV6) { 3467 struct in6pcb *in6p; 3468 3469 in6p = (struct in6pcb *)inp; 3470 ip6_freepcbopts(in6p->in6p_outputopts); 3471 } 3472 #endif /* INET6 */ 3473 ip_pcb->inp_vflag = 0; 3474 /* free up authentication fields */ 3475 if (inp->sctp_ep.local_auth_chunks != NULL) 3476 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3477 if (inp->sctp_ep.local_hmacs != NULL) 3478 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3479 3480 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 3481 while (shared_key) { 3482 LIST_REMOVE(shared_key, next); 3483 sctp_free_sharedkey(shared_key); 3484 /* sa_ignore FREED_MEMORY */ 3485 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 3486 } 3487 3488 inp_save = LIST_NEXT(inp, sctp_list); 3489 LIST_REMOVE(inp, sctp_list); 3490 3491 /* fix any iterators only after out of the list */ 3492 sctp_iterator_inp_being_freed(inp, inp_save); 3493 /* 3494 * if we have an address list the following will free the list of 3495 * ifaddr's that are set into this ep. Again macro limitations here, 3496 * since the LIST_FOREACH could be a bad idea. 3497 */ 3498 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; 3499 laddr = nladdr) { 3500 nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 3501 sctp_remove_laddr(laddr); 3502 } 3503 3504 #ifdef SCTP_TRACK_FREED_ASOCS 3505 /* TEMP CODE */ 3506 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; 3507 asoc = nasoc) { 3508 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3509 LIST_REMOVE(asoc, sctp_tcblist); 3510 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3511 SCTP_DECR_ASOC_COUNT(); 3512 } 3513 /* *** END TEMP CODE *** */ 3514 #endif 3515 /* Now lets see about freeing the EP hash table. */ 3516 if (inp->sctp_tcbhash != NULL) { 3517 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3518 inp->sctp_tcbhash = NULL; 3519 } 3520 /* Now we must put the ep memory back into the zone pool */ 3521 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3522 SCTP_INP_LOCK_DESTROY(inp); 3523 SCTP_INP_READ_DESTROY(inp); 3524 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3525 SCTP_INP_INFO_WUNLOCK(); 3526 SCTP_ITERATOR_UNLOCK(); 3527 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3528 SCTP_DECR_EP_COUNT(); 3529 } 3530 3531 3532 struct sctp_nets * 3533 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3534 { 3535 struct sctp_nets *net; 3536 3537 /* locate the address */ 3538 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3539 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3540 return (net); 3541 } 3542 return (NULL); 3543 } 3544 3545 3546 int 3547 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3548 { 3549 struct sctp_ifa *sctp_ifa; 3550 3551 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3552 if (sctp_ifa) { 3553 return (1); 3554 } else { 3555 return (0); 3556 } 3557 } 3558 3559 /* 3560 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3561 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3562 * stats of stuff. 3563 */ 3564 int 3565 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3566 int set_scope, int from) 3567 { 3568 /* 3569 * The following is redundant to the same lines in the 3570 * sctp_aloc_assoc() but is needed since other's call the add 3571 * address function 3572 */ 3573 struct sctp_nets *net, *netfirst; 3574 int addr_inscope; 3575 3576 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3577 from); 3578 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3579 3580 netfirst = sctp_findnet(stcb, newaddr); 3581 if (netfirst) { 3582 /* 3583 * Lie and return ok, we don't want to make the association 3584 * go away for this behavior. It will happen in the TCP 3585 * model in a connected socket. It does not reach the hash 3586 * table until after the association is built so it can't be 3587 * found. Mark as reachable, since the initial creation will 3588 * have been cleared and the NOT_IN_ASSOC flag will have 3589 * been added... and we don't want to end up removing it 3590 * back out. 3591 */ 3592 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3593 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3594 SCTP_ADDR_UNCONFIRMED); 3595 } else { 3596 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3597 } 3598 3599 return (0); 3600 } 3601 addr_inscope = 1; 3602 if (newaddr->sa_family == AF_INET) { 3603 struct sockaddr_in *sin; 3604 3605 sin = (struct sockaddr_in *)newaddr; 3606 if (sin->sin_addr.s_addr == 0) { 3607 /* Invalid address */ 3608 return (-1); 3609 } 3610 /* zero out the bzero area */ 3611 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3612 3613 /* assure len is set */ 3614 sin->sin_len = sizeof(struct sockaddr_in); 3615 if (set_scope) { 3616 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3617 stcb->ipv4_local_scope = 1; 3618 #else 3619 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3620 stcb->asoc.ipv4_local_scope = 1; 3621 } 3622 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3623 } else { 3624 /* Validate the address is in scope */ 3625 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3626 (stcb->asoc.ipv4_local_scope == 0)) { 3627 addr_inscope = 0; 3628 } 3629 } 3630 #ifdef INET6 3631 } else if (newaddr->sa_family == AF_INET6) { 3632 struct sockaddr_in6 *sin6; 3633 3634 sin6 = (struct sockaddr_in6 *)newaddr; 3635 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3636 /* Invalid address */ 3637 return (-1); 3638 } 3639 /* assure len is set */ 3640 sin6->sin6_len = sizeof(struct sockaddr_in6); 3641 if (set_scope) { 3642 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3643 stcb->asoc.loopback_scope = 1; 3644 stcb->asoc.local_scope = 0; 3645 stcb->asoc.ipv4_local_scope = 1; 3646 stcb->asoc.site_scope = 1; 3647 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3648 /* 3649 * If the new destination is a LINK_LOCAL we 3650 * must have common site scope. Don't set 3651 * the local scope since we may not share 3652 * all links, only loopback can do this. 3653 * Links on the local network would also be 3654 * on our private network for v4 too. 3655 */ 3656 stcb->asoc.ipv4_local_scope = 1; 3657 stcb->asoc.site_scope = 1; 3658 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3659 /* 3660 * If the new destination is SITE_LOCAL then 3661 * we must have site scope in common. 3662 */ 3663 stcb->asoc.site_scope = 1; 3664 } 3665 } else { 3666 /* Validate the address is in scope */ 3667 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3668 (stcb->asoc.loopback_scope == 0)) { 3669 addr_inscope = 0; 3670 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3671 (stcb->asoc.local_scope == 0)) { 3672 addr_inscope = 0; 3673 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3674 (stcb->asoc.site_scope == 0)) { 3675 addr_inscope = 0; 3676 } 3677 } 3678 #endif 3679 } else { 3680 /* not supported family type */ 3681 return (-1); 3682 } 3683 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3684 if (net == NULL) { 3685 return (-1); 3686 } 3687 SCTP_INCR_RADDR_COUNT(); 3688 bzero(net, sizeof(*net)); 3689 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3690 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3691 if (newaddr->sa_family == AF_INET) { 3692 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3693 } else if (newaddr->sa_family == AF_INET6) { 3694 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3695 } 3696 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3697 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3698 stcb->asoc.loopback_scope = 1; 3699 stcb->asoc.ipv4_local_scope = 1; 3700 stcb->asoc.local_scope = 0; 3701 stcb->asoc.site_scope = 1; 3702 addr_inscope = 1; 3703 } 3704 net->failure_threshold = stcb->asoc.def_net_failure; 3705 if (addr_inscope == 0) { 3706 net->dest_state = (SCTP_ADDR_REACHABLE | 3707 SCTP_ADDR_OUT_OF_SCOPE); 3708 } else { 3709 if (from == SCTP_ADDR_IS_CONFIRMED) 3710 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3711 net->dest_state = SCTP_ADDR_REACHABLE; 3712 else 3713 net->dest_state = SCTP_ADDR_REACHABLE | 3714 SCTP_ADDR_UNCONFIRMED; 3715 } 3716 /* 3717 * We set this to 0, the timer code knows that this means its an 3718 * initial value 3719 */ 3720 net->RTO = 0; 3721 net->RTO_measured = 0; 3722 stcb->asoc.numnets++; 3723 *(&net->ref_count) = 1; 3724 net->tos_flowlabel = 0; 3725 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 3726 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 3727 } else { 3728 net->port = 0; 3729 } 3730 #ifdef INET 3731 if (newaddr->sa_family == AF_INET) 3732 net->tos_flowlabel = stcb->asoc.default_tos; 3733 #endif 3734 #ifdef INET6 3735 if (newaddr->sa_family == AF_INET6) 3736 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3737 #endif 3738 /* Init the timer structure */ 3739 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3740 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3741 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3742 3743 /* Now generate a route for this guy */ 3744 #ifdef INET6 3745 /* KAME hack: embed scopeid */ 3746 if (newaddr->sa_family == AF_INET6) { 3747 struct sockaddr_in6 *sin6; 3748 3749 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3750 (void)sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)); 3751 sin6->sin6_scope_id = 0; 3752 } 3753 #endif 3754 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3755 3756 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3757 /* Get source address */ 3758 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3759 stcb, 3760 (sctp_route_t *) & net->ro, 3761 net, 3762 0, 3763 stcb->asoc.vrf_id); 3764 /* Now get the interface MTU */ 3765 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3766 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3767 } else { 3768 net->mtu = 0; 3769 } 3770 #ifdef SCTP_PRINT_FOR_B_AND_M 3771 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu); 3772 #endif 3773 if (net->mtu == 0) { 3774 /* Huh ?? */ 3775 net->mtu = SCTP_DEFAULT_MTU; 3776 } else { 3777 uint32_t rmtu; 3778 3779 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3780 #ifdef SCTP_PRINT_FOR_B_AND_M 3781 SCTP_PRINTF("The route mtu is %d\n", rmtu); 3782 #endif 3783 if (rmtu == 0) { 3784 /* 3785 * Start things off to match mtu of 3786 * interface please. 3787 */ 3788 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3789 net->ro.ro_rt, net->mtu); 3790 } else { 3791 /* 3792 * we take the route mtu over the interface, 3793 * since the route may be leading out the 3794 * loopback, or a different interface. 3795 */ 3796 net->mtu = rmtu; 3797 } 3798 } 3799 if (from == SCTP_ALLOC_ASOC) { 3800 #ifdef SCTP_PRINT_FOR_B_AND_M 3801 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu); 3802 #endif 3803 stcb->asoc.smallest_mtu = net->mtu; 3804 } 3805 } else { 3806 net->mtu = stcb->asoc.smallest_mtu; 3807 } 3808 #ifdef INET6 3809 if (newaddr->sa_family == AF_INET6) { 3810 struct sockaddr_in6 *sin6; 3811 3812 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3813 (void)sa6_recoverscope(sin6); 3814 } 3815 #endif 3816 if (net->port) { 3817 net->mtu -= sizeof(struct udphdr); 3818 } 3819 if (stcb->asoc.smallest_mtu > net->mtu) { 3820 #ifdef SCTP_PRINT_FOR_B_AND_M 3821 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n", 3822 net->mtu, stcb->asoc.smallest_mtu); 3823 #endif 3824 stcb->asoc.smallest_mtu = net->mtu; 3825 } 3826 /* JRS - Use the congestion control given in the CC module */ 3827 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 3828 3829 /* 3830 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3831 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3832 */ 3833 net->find_pseudo_cumack = 1; 3834 net->find_rtx_pseudo_cumack = 1; 3835 net->src_addr_selected = 0; 3836 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3837 if (net->ro.ro_rt == NULL) { 3838 /* Since we have no route put it at the back */ 3839 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3840 } else if (netfirst == NULL) { 3841 /* We are the first one in the pool. */ 3842 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3843 } else if (netfirst->ro.ro_rt == NULL) { 3844 /* 3845 * First one has NO route. Place this one ahead of the first 3846 * one. 3847 */ 3848 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3849 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3850 /* 3851 * This one has a different interface than the one at the 3852 * top of the list. Place it ahead. 3853 */ 3854 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3855 } else { 3856 /* 3857 * Ok we have the same interface as the first one. Move 3858 * forward until we find either a) one with a NULL route... 3859 * insert ahead of that b) one with a different ifp.. insert 3860 * after that. c) end of the list.. insert at the tail. 3861 */ 3862 struct sctp_nets *netlook; 3863 3864 do { 3865 netlook = TAILQ_NEXT(netfirst, sctp_next); 3866 if (netlook == NULL) { 3867 /* End of the list */ 3868 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3869 break; 3870 } else if (netlook->ro.ro_rt == NULL) { 3871 /* next one has NO route */ 3872 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 3873 break; 3874 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 3875 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 3876 net, sctp_next); 3877 break; 3878 } 3879 /* Shift forward */ 3880 netfirst = netlook; 3881 } while (netlook != NULL); 3882 } 3883 3884 /* got to have a primary set */ 3885 if (stcb->asoc.primary_destination == 0) { 3886 stcb->asoc.primary_destination = net; 3887 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 3888 (net->ro.ro_rt) && 3889 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 3890 /* No route to current primary adopt new primary */ 3891 stcb->asoc.primary_destination = net; 3892 } 3893 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 3894 net); 3895 /* Validate primary is first */ 3896 net = TAILQ_FIRST(&stcb->asoc.nets); 3897 if ((net != stcb->asoc.primary_destination) && 3898 (stcb->asoc.primary_destination)) { 3899 /* 3900 * first one on the list is NOT the primary sctp_cmpaddr() 3901 * is much more efficent if the primary is the first on the 3902 * list, make it so. 3903 */ 3904 TAILQ_REMOVE(&stcb->asoc.nets, 3905 stcb->asoc.primary_destination, sctp_next); 3906 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 3907 stcb->asoc.primary_destination, sctp_next); 3908 } 3909 return (0); 3910 } 3911 3912 3913 static uint32_t 3914 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 3915 { 3916 uint32_t id; 3917 struct sctpasochead *head; 3918 struct sctp_tcb *lstcb; 3919 3920 try_again: 3921 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3922 /* TSNH */ 3923 return (0); 3924 } 3925 SCTP_INP_WLOCK(inp); 3926 id = inp->sctp_associd_counter; 3927 inp->sctp_associd_counter++; 3928 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 3929 if (lstcb) { 3930 goto try_again; 3931 } 3932 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 3933 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 3934 stcb->asoc.in_asocid_hash = 1; 3935 SCTP_INP_WUNLOCK(inp); 3936 return id; 3937 } 3938 3939 /* 3940 * allocate an association and add it to the endpoint. The caller must be 3941 * careful to add all additional addresses once they are know right away or 3942 * else the assoc will be may experience a blackout scenario. 3943 */ 3944 struct sctp_tcb * 3945 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 3946 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id, 3947 struct thread *p 3948 ) 3949 { 3950 /* note the p argument is only valid in unbound sockets */ 3951 3952 struct sctp_tcb *stcb; 3953 struct sctp_association *asoc; 3954 struct sctpasochead *head; 3955 uint16_t rport; 3956 int err; 3957 3958 /* 3959 * Assumption made here: Caller has done a 3960 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 3961 * address does not exist already. 3962 */ 3963 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 3964 /* Hit max assoc, sorry no more */ 3965 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 3966 *error = ENOBUFS; 3967 return (NULL); 3968 } 3969 if (firstaddr == NULL) { 3970 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3971 *error = EINVAL; 3972 return (NULL); 3973 } 3974 SCTP_INP_RLOCK(inp); 3975 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 3976 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 3977 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 3978 /* 3979 * If its in the TCP pool, its NOT allowed to create an 3980 * association. The parent listener needs to call 3981 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 3982 * off, or connected one does this.. its an error. 3983 */ 3984 SCTP_INP_RUNLOCK(inp); 3985 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3986 *error = EINVAL; 3987 return (NULL); 3988 } 3989 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 3990 #ifdef SCTP_DEBUG 3991 if (firstaddr) { 3992 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 3993 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 3994 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 3995 } else { 3996 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 3997 } 3998 #endif /* SCTP_DEBUG */ 3999 if (firstaddr->sa_family == AF_INET) { 4000 struct sockaddr_in *sin; 4001 4002 sin = (struct sockaddr_in *)firstaddr; 4003 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 4004 /* Invalid address */ 4005 SCTP_INP_RUNLOCK(inp); 4006 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4007 *error = EINVAL; 4008 return (NULL); 4009 } 4010 rport = sin->sin_port; 4011 } else if (firstaddr->sa_family == AF_INET6) { 4012 struct sockaddr_in6 *sin6; 4013 4014 sin6 = (struct sockaddr_in6 *)firstaddr; 4015 if ((sin6->sin6_port == 0) || 4016 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 4017 /* Invalid address */ 4018 SCTP_INP_RUNLOCK(inp); 4019 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4020 *error = EINVAL; 4021 return (NULL); 4022 } 4023 rport = sin6->sin6_port; 4024 } else { 4025 /* not supported family type */ 4026 SCTP_INP_RUNLOCK(inp); 4027 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4028 *error = EINVAL; 4029 return (NULL); 4030 } 4031 SCTP_INP_RUNLOCK(inp); 4032 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4033 /* 4034 * If you have not performed a bind, then we need to do the 4035 * ephemerial bind for you. 4036 */ 4037 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4038 (struct sockaddr *)NULL, 4039 (struct sctp_ifa *)NULL, 4040 p 4041 ))) { 4042 /* bind error, probably perm */ 4043 *error = err; 4044 return (NULL); 4045 } 4046 } 4047 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4048 if (stcb == NULL) { 4049 /* out of memory? */ 4050 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4051 *error = ENOMEM; 4052 return (NULL); 4053 } 4054 SCTP_INCR_ASOC_COUNT(); 4055 4056 bzero(stcb, sizeof(*stcb)); 4057 asoc = &stcb->asoc; 4058 4059 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4060 SCTP_TCB_LOCK_INIT(stcb); 4061 SCTP_TCB_SEND_LOCK_INIT(stcb); 4062 stcb->rport = rport; 4063 /* setup back pointer's */ 4064 stcb->sctp_ep = inp; 4065 stcb->sctp_socket = inp->sctp_socket; 4066 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) { 4067 /* failed */ 4068 SCTP_TCB_LOCK_DESTROY(stcb); 4069 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4070 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4071 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4072 SCTP_DECR_ASOC_COUNT(); 4073 *error = err; 4074 return (NULL); 4075 } 4076 /* and the port */ 4077 SCTP_INP_INFO_WLOCK(); 4078 SCTP_INP_WLOCK(inp); 4079 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4080 /* inpcb freed while alloc going on */ 4081 SCTP_TCB_LOCK_DESTROY(stcb); 4082 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4083 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4084 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4085 SCTP_INP_WUNLOCK(inp); 4086 SCTP_INP_INFO_WUNLOCK(); 4087 SCTP_DECR_ASOC_COUNT(); 4088 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4089 *error = EINVAL; 4090 return (NULL); 4091 } 4092 SCTP_TCB_LOCK(stcb); 4093 4094 /* now that my_vtag is set, add it to the hash */ 4095 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4096 /* put it in the bucket in the vtag hash of assoc's for the system */ 4097 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4098 #ifdef MICHAELS_EXPERIMENT 4099 sctp_delete_from_timewait(stcb->asoc.my_vtag, inp->sctp_lport, stcb->rport); 4100 #endif 4101 SCTP_INP_INFO_WUNLOCK(); 4102 4103 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4104 /* failure.. memory error? */ 4105 if (asoc->strmout) { 4106 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4107 asoc->strmout = NULL; 4108 } 4109 if (asoc->mapping_array) { 4110 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4111 asoc->mapping_array = NULL; 4112 } 4113 SCTP_DECR_ASOC_COUNT(); 4114 SCTP_TCB_LOCK_DESTROY(stcb); 4115 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4116 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4117 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4118 SCTP_INP_WUNLOCK(inp); 4119 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4120 *error = ENOBUFS; 4121 return (NULL); 4122 } 4123 /* Init all the timers */ 4124 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 4125 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4126 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4127 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4128 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4129 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4130 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4131 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4132 4133 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4134 /* now file the port under the hash as well */ 4135 if (inp->sctp_tcbhash != NULL) { 4136 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4137 inp->sctp_hashmark)]; 4138 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4139 } 4140 SCTP_INP_WUNLOCK(inp); 4141 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4142 return (stcb); 4143 } 4144 4145 4146 void 4147 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4148 { 4149 struct sctp_association *asoc; 4150 4151 asoc = &stcb->asoc; 4152 asoc->numnets--; 4153 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4154 if (net == asoc->primary_destination) { 4155 /* Reset primary */ 4156 struct sctp_nets *lnet; 4157 4158 lnet = TAILQ_FIRST(&asoc->nets); 4159 /* 4160 * Mobility adaptation Ideally, if deleted destination is 4161 * the primary, it becomes a fast retransmission trigger by 4162 * the subsequent SET PRIMARY. (by micchie) 4163 */ 4164 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4165 SCTP_MOBILITY_BASE) || 4166 sctp_is_mobility_feature_on(stcb->sctp_ep, 4167 SCTP_MOBILITY_FASTHANDOFF)) { 4168 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4169 if (asoc->deleted_primary != NULL) { 4170 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4171 goto out; 4172 } 4173 asoc->deleted_primary = net; 4174 atomic_add_int(&net->ref_count, 1); 4175 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4176 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4177 sctp_mobility_feature_on(stcb->sctp_ep, 4178 SCTP_MOBILITY_PRIM_DELETED); 4179 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4180 stcb->sctp_ep, stcb, NULL); 4181 } 4182 out: 4183 /* Try to find a confirmed primary */ 4184 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4185 } 4186 if (net == asoc->last_data_chunk_from) { 4187 /* Reset primary */ 4188 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4189 } 4190 if (net == asoc->last_control_chunk_from) { 4191 /* Clear net */ 4192 asoc->last_control_chunk_from = NULL; 4193 } 4194 sctp_free_remote_addr(net); 4195 } 4196 4197 /* 4198 * remove a remote endpoint address from an association, it will fail if the 4199 * address does not exist. 4200 */ 4201 int 4202 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4203 { 4204 /* 4205 * Here we need to remove a remote address. This is quite simple, we 4206 * first find it in the list of address for the association 4207 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4208 * on that item. Note we do not allow it to be removed if there are 4209 * no other addresses. 4210 */ 4211 struct sctp_association *asoc; 4212 struct sctp_nets *net, *net_tmp; 4213 4214 asoc = &stcb->asoc; 4215 4216 /* locate the address */ 4217 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { 4218 net_tmp = TAILQ_NEXT(net, sctp_next); 4219 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4220 continue; 4221 } 4222 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4223 remaddr)) { 4224 /* we found the guy */ 4225 if (asoc->numnets < 2) { 4226 /* Must have at LEAST two remote addresses */ 4227 return (-1); 4228 } else { 4229 sctp_remove_net(stcb, net); 4230 return (0); 4231 } 4232 } 4233 } 4234 /* not found. */ 4235 return (-2); 4236 } 4237 4238 void 4239 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4240 { 4241 struct sctpvtaghead *chain; 4242 struct sctp_tagblock *twait_block; 4243 int found = 0; 4244 int i; 4245 4246 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4247 if (!SCTP_LIST_EMPTY(chain)) { 4248 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4249 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4250 if ((twait_block->vtag_block[i].v_tag == tag) && 4251 (twait_block->vtag_block[i].lport == lport) && 4252 (twait_block->vtag_block[i].rport == rport)) { 4253 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4254 twait_block->vtag_block[i].v_tag = 0; 4255 twait_block->vtag_block[i].lport = 0; 4256 twait_block->vtag_block[i].rport = 0; 4257 found = 1; 4258 break; 4259 } 4260 } 4261 if (found) 4262 break; 4263 } 4264 } 4265 } 4266 4267 int 4268 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4269 { 4270 struct sctpvtaghead *chain; 4271 struct sctp_tagblock *twait_block; 4272 int found = 0; 4273 int i; 4274 4275 SCTP_INP_INFO_WLOCK(); 4276 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4277 if (!SCTP_LIST_EMPTY(chain)) { 4278 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4279 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4280 if ((twait_block->vtag_block[i].v_tag == tag) && 4281 (twait_block->vtag_block[i].lport == lport) && 4282 (twait_block->vtag_block[i].rport == rport)) { 4283 found = 1; 4284 break; 4285 } 4286 } 4287 if (found) 4288 break; 4289 } 4290 } 4291 SCTP_INP_INFO_WUNLOCK(); 4292 return (found); 4293 } 4294 4295 4296 void 4297 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4298 { 4299 struct sctpvtaghead *chain; 4300 struct sctp_tagblock *twait_block; 4301 struct timeval now; 4302 int set, i; 4303 4304 (void)SCTP_GETTIME_TIMEVAL(&now); 4305 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4306 set = 0; 4307 if (!SCTP_LIST_EMPTY(chain)) { 4308 /* Block(s) present, lets find space, and expire on the fly */ 4309 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4310 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4311 if ((twait_block->vtag_block[i].v_tag == 0) && 4312 !set) { 4313 twait_block->vtag_block[i].tv_sec_at_expire = 4314 now.tv_sec + time; 4315 twait_block->vtag_block[i].v_tag = tag; 4316 twait_block->vtag_block[i].lport = lport; 4317 twait_block->vtag_block[i].rport = rport; 4318 set = 1; 4319 } else if ((twait_block->vtag_block[i].v_tag) && 4320 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4321 /* Audit expires this guy */ 4322 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4323 twait_block->vtag_block[i].v_tag = 0; 4324 twait_block->vtag_block[i].lport = 0; 4325 twait_block->vtag_block[i].rport = 0; 4326 if (set == 0) { 4327 /* Reuse it for my new tag */ 4328 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4329 twait_block->vtag_block[i].v_tag = tag; 4330 twait_block->vtag_block[i].lport = lport; 4331 twait_block->vtag_block[i].rport = rport; 4332 set = 1; 4333 } 4334 } 4335 } 4336 if (set) { 4337 /* 4338 * We only do up to the block where we can 4339 * place our tag for audits 4340 */ 4341 break; 4342 } 4343 } 4344 } 4345 /* Need to add a new block to chain */ 4346 if (!set) { 4347 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4348 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4349 if (twait_block == NULL) { 4350 #ifdef INVARIANTS 4351 panic("Can not alloc tagblock"); 4352 #endif 4353 return; 4354 } 4355 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4356 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4357 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4358 twait_block->vtag_block[0].v_tag = tag; 4359 twait_block->vtag_block[0].lport = lport; 4360 twait_block->vtag_block[0].rport = rport; 4361 } 4362 } 4363 4364 4365 static void 4366 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4367 { 4368 struct sctp_iterator *it; 4369 4370 /* 4371 * Unlock the tcb lock we do this so we avoid a dead lock scenario 4372 * where the iterator is waiting on the TCB lock and the TCB lock is 4373 * waiting on the iterator lock. 4374 */ 4375 it = stcb->asoc.stcb_starting_point_for_iterator; 4376 if (it == NULL) { 4377 return; 4378 } 4379 if (it->inp != stcb->sctp_ep) { 4380 /* hmm, focused on the wrong one? */ 4381 return; 4382 } 4383 if (it->stcb != stcb) { 4384 return; 4385 } 4386 it->stcb = LIST_NEXT(stcb, sctp_tcblist); 4387 if (it->stcb == NULL) { 4388 /* done with all asoc's in this assoc */ 4389 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 4390 it->inp = NULL; 4391 } else { 4392 it->inp = LIST_NEXT(inp, sctp_list); 4393 } 4394 } 4395 } 4396 4397 4398 /*- 4399 * Free the association after un-hashing the remote port. This 4400 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4401 * expect that the input to this function IS a locked TCB. 4402 * It will return 0, if it did NOT destroy the association (instead 4403 * it unlocks it. It will return NON-zero if it either destroyed the 4404 * association OR the association is already destroyed. 4405 */ 4406 int 4407 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4408 { 4409 int i; 4410 struct sctp_association *asoc; 4411 struct sctp_nets *net, *prev; 4412 struct sctp_laddr *laddr; 4413 struct sctp_tmit_chunk *chk; 4414 struct sctp_asconf_addr *aparam; 4415 struct sctp_asconf_ack *aack; 4416 struct sctp_stream_reset_list *liste; 4417 struct sctp_queued_to_read *sq; 4418 struct sctp_stream_queue_pending *sp; 4419 sctp_sharedkey_t *shared_key; 4420 struct socket *so; 4421 int ccnt = 0; 4422 int cnt = 0; 4423 4424 /* first, lets purge the entry from the hash table. */ 4425 4426 #ifdef SCTP_LOG_CLOSING 4427 sctp_log_closing(inp, stcb, 6); 4428 #endif 4429 if (stcb->asoc.state == 0) { 4430 #ifdef SCTP_LOG_CLOSING 4431 sctp_log_closing(inp, NULL, 7); 4432 #endif 4433 /* there is no asoc, really TSNH :-0 */ 4434 return (1); 4435 } 4436 /* TEMP CODE */ 4437 if (stcb->freed_from_where == 0) { 4438 /* Only record the first place free happened from */ 4439 stcb->freed_from_where = from_location; 4440 } 4441 /* TEMP CODE */ 4442 4443 asoc = &stcb->asoc; 4444 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4445 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4446 /* nothing around */ 4447 so = NULL; 4448 else 4449 so = inp->sctp_socket; 4450 4451 /* 4452 * We used timer based freeing if a reader or writer is in the way. 4453 * So we first check if we are actually being called from a timer, 4454 * if so we abort early if a reader or writer is still in the way. 4455 */ 4456 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4457 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4458 /* 4459 * is it the timer driving us? if so are the reader/writers 4460 * gone? 4461 */ 4462 if (stcb->asoc.refcnt) { 4463 /* nope, reader or writer in the way */ 4464 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4465 /* no asoc destroyed */ 4466 SCTP_TCB_UNLOCK(stcb); 4467 #ifdef SCTP_LOG_CLOSING 4468 sctp_log_closing(inp, stcb, 8); 4469 #endif 4470 return (0); 4471 } 4472 } 4473 /* now clean up any other timers */ 4474 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4475 asoc->hb_timer.self = NULL; 4476 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4477 asoc->dack_timer.self = NULL; 4478 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4479 /*- 4480 * For stream reset we don't blast this unless 4481 * it is a str-reset timer, it might be the 4482 * free-asoc timer which we DON'T want to 4483 * disturb. 4484 */ 4485 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4486 asoc->strreset_timer.self = NULL; 4487 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4488 asoc->asconf_timer.self = NULL; 4489 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4490 asoc->autoclose_timer.self = NULL; 4491 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4492 asoc->shut_guard_timer.self = NULL; 4493 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4494 asoc->delayed_event_timer.self = NULL; 4495 /* Mobility adaptation */ 4496 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4497 asoc->delete_prim_timer.self = NULL; 4498 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4499 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4500 net->fr_timer.self = NULL; 4501 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4502 net->rxt_timer.self = NULL; 4503 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4504 net->pmtu_timer.self = NULL; 4505 } 4506 /* Now the read queue needs to be cleaned up (only once) */ 4507 cnt = 0; 4508 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4509 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4510 SCTP_INP_READ_LOCK(inp); 4511 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4512 if (sq->stcb == stcb) { 4513 sq->do_not_ref_stcb = 1; 4514 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4515 /* 4516 * If there is no end, there never will be 4517 * now. 4518 */ 4519 if (sq->end_added == 0) { 4520 /* Held for PD-API clear that. */ 4521 sq->pdapi_aborted = 1; 4522 sq->held_length = 0; 4523 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4524 /* 4525 * Need to add a PD-API 4526 * aborted indication. 4527 * Setting the control_pdapi 4528 * assures that it will be 4529 * added right after this 4530 * msg. 4531 */ 4532 uint32_t strseq; 4533 4534 stcb->asoc.control_pdapi = sq; 4535 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4536 sctp_notify_partial_delivery_indication(stcb, 4537 SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq); 4538 stcb->asoc.control_pdapi = NULL; 4539 } 4540 } 4541 /* Add an end to wake them */ 4542 sq->end_added = 1; 4543 cnt++; 4544 } 4545 } 4546 SCTP_INP_READ_UNLOCK(inp); 4547 if (stcb->block_entry) { 4548 cnt++; 4549 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4550 stcb->block_entry->error = ECONNRESET; 4551 stcb->block_entry = NULL; 4552 } 4553 } 4554 if (stcb->asoc.refcnt) { 4555 /* 4556 * reader or writer in the way, we have hopefully given him 4557 * something to chew on above. 4558 */ 4559 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4560 SCTP_TCB_UNLOCK(stcb); 4561 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4562 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4563 /* nothing around */ 4564 so = NULL; 4565 if (so) { 4566 /* Wake any reader/writers */ 4567 sctp_sorwakeup(inp, so); 4568 sctp_sowwakeup(inp, so); 4569 } 4570 #ifdef SCTP_LOG_CLOSING 4571 sctp_log_closing(inp, stcb, 9); 4572 #endif 4573 /* no asoc destroyed */ 4574 return (0); 4575 } 4576 #ifdef SCTP_LOG_CLOSING 4577 sctp_log_closing(inp, stcb, 10); 4578 #endif 4579 /* 4580 * When I reach here, no others want to kill the assoc yet.. and I 4581 * own the lock. Now its possible an abort comes in when I do the 4582 * lock exchange below to grab all the locks to do the final take 4583 * out. to prevent this we increment the count, which will start a 4584 * timer and blow out above thus assuring us that we hold exclusive 4585 * killing of the asoc. Note that after getting back the TCB lock we 4586 * will go ahead and increment the counter back up and stop any 4587 * timer a passing stranger may have started :-S 4588 */ 4589 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4590 atomic_add_int(&stcb->asoc.refcnt, 1); 4591 4592 SCTP_TCB_UNLOCK(stcb); 4593 4594 SCTP_ITERATOR_LOCK(); 4595 SCTP_INP_INFO_WLOCK(); 4596 SCTP_INP_WLOCK(inp); 4597 SCTP_TCB_LOCK(stcb); 4598 } 4599 /* Double check the GONE flag */ 4600 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4601 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4602 /* nothing around */ 4603 so = NULL; 4604 4605 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4606 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4607 /* 4608 * For TCP type we need special handling when we are 4609 * connected. We also include the peel'ed off ones to. 4610 */ 4611 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4612 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4613 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4614 if (so) { 4615 SOCK_LOCK(so); 4616 if (so->so_rcv.sb_cc == 0) { 4617 so->so_state &= ~(SS_ISCONNECTING | 4618 SS_ISDISCONNECTING | 4619 SS_ISCONFIRMING | 4620 SS_ISCONNECTED); 4621 } 4622 SOCK_UNLOCK(so); 4623 socantrcvmore(so); 4624 sctp_sowwakeup(inp, so); 4625 sctp_sorwakeup(inp, so); 4626 SCTP_SOWAKEUP(so); 4627 } 4628 } 4629 } 4630 /* 4631 * Make it invalid too, that way if its about to run it will abort 4632 * and return. 4633 */ 4634 sctp_iterator_asoc_being_freed(inp, stcb); 4635 /* re-increment the lock */ 4636 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4637 atomic_add_int(&stcb->asoc.refcnt, -1); 4638 } 4639 asoc->state = 0; 4640 if (inp->sctp_tcbhash) { 4641 LIST_REMOVE(stcb, sctp_tcbhash); 4642 } 4643 if (stcb->asoc.in_asocid_hash) { 4644 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4645 } 4646 /* Now lets remove it from the list of ALL associations in the EP */ 4647 LIST_REMOVE(stcb, sctp_tcblist); 4648 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4649 SCTP_INP_INCR_REF(inp); 4650 SCTP_INP_WUNLOCK(inp); 4651 SCTP_ITERATOR_UNLOCK(); 4652 } 4653 /* pull from vtag hash */ 4654 LIST_REMOVE(stcb, sctp_asocs); 4655 sctp_add_vtag_to_timewait(asoc->my_vtag, inp->sctp_lport, stcb->rport, SCTP_TIME_WAIT); 4656 4657 /* 4658 * Now restop the timers to be sure - this is paranoia at is finest! 4659 */ 4660 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4661 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4662 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4663 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4664 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4665 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4666 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4667 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4668 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4669 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4670 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4671 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4672 } 4673 4674 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4675 prev = NULL; 4676 /* 4677 * The chunk lists and such SHOULD be empty but we check them just 4678 * in case. 4679 */ 4680 /* anything on the wheel needs to be removed */ 4681 for (i = 0; i < asoc->streamoutcnt; i++) { 4682 struct sctp_stream_out *outs; 4683 4684 outs = &asoc->strmout[i]; 4685 /* now clean up any chunks here */ 4686 sp = TAILQ_FIRST(&outs->outqueue); 4687 while (sp) { 4688 TAILQ_REMOVE(&outs->outqueue, sp, next); 4689 if (sp->data) { 4690 sctp_m_freem(sp->data); 4691 sp->data = NULL; 4692 sp->tail_mbuf = NULL; 4693 } 4694 sctp_free_remote_addr(sp->net); 4695 sctp_free_spbufspace(stcb, asoc, sp); 4696 if (sp->holds_key_ref) 4697 sctp_auth_key_release(stcb, sp->auth_keyid); 4698 /* Free the zone stuff */ 4699 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 4700 SCTP_DECR_STRMOQ_COUNT(); 4701 /* sa_ignore FREED_MEMORY */ 4702 sp = TAILQ_FIRST(&outs->outqueue); 4703 } 4704 } 4705 4706 /* sa_ignore FREED_MEMORY */ 4707 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { 4708 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); 4709 SCTP_FREE(liste, SCTP_M_STRESET); 4710 } 4711 4712 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 4713 while (sq) { 4714 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4715 if (sq->data) { 4716 sctp_m_freem(sq->data); 4717 sq->data = NULL; 4718 } 4719 sctp_free_remote_addr(sq->whoFrom); 4720 sq->whoFrom = NULL; 4721 sq->stcb = NULL; 4722 /* Free the ctl entry */ 4723 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4724 SCTP_DECR_READQ_COUNT(); 4725 /* sa_ignore FREED_MEMORY */ 4726 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 4727 } 4728 4729 chk = TAILQ_FIRST(&asoc->free_chunks); 4730 while (chk) { 4731 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4732 if (chk->data) { 4733 sctp_m_freem(chk->data); 4734 chk->data = NULL; 4735 } 4736 if (chk->holds_key_ref) 4737 sctp_auth_key_release(stcb, chk->auth_keyid); 4738 ccnt++; 4739 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4740 SCTP_DECR_CHK_COUNT(); 4741 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4742 asoc->free_chunk_cnt--; 4743 /* sa_ignore FREED_MEMORY */ 4744 chk = TAILQ_FIRST(&asoc->free_chunks); 4745 } 4746 /* pending send queue SHOULD be empty */ 4747 if (!TAILQ_EMPTY(&asoc->send_queue)) { 4748 chk = TAILQ_FIRST(&asoc->send_queue); 4749 while (chk) { 4750 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4751 if (chk->data) { 4752 sctp_m_freem(chk->data); 4753 chk->data = NULL; 4754 } 4755 if (chk->holds_key_ref) 4756 sctp_auth_key_release(stcb, chk->auth_keyid); 4757 ccnt++; 4758 sctp_free_remote_addr(chk->whoTo); 4759 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4760 SCTP_DECR_CHK_COUNT(); 4761 /* sa_ignore FREED_MEMORY */ 4762 chk = TAILQ_FIRST(&asoc->send_queue); 4763 } 4764 } 4765 /* 4766 if(ccnt) { 4767 printf("Freed %d from send_queue\n", ccnt); 4768 ccnt = 0; 4769 } 4770 */ 4771 /* sent queue SHOULD be empty */ 4772 if (!TAILQ_EMPTY(&asoc->sent_queue)) { 4773 chk = TAILQ_FIRST(&asoc->sent_queue); 4774 while (chk) { 4775 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4776 if (chk->data) { 4777 sctp_m_freem(chk->data); 4778 chk->data = NULL; 4779 } 4780 if (chk->holds_key_ref) 4781 sctp_auth_key_release(stcb, chk->auth_keyid); 4782 ccnt++; 4783 sctp_free_remote_addr(chk->whoTo); 4784 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4785 SCTP_DECR_CHK_COUNT(); 4786 /* sa_ignore FREED_MEMORY */ 4787 chk = TAILQ_FIRST(&asoc->sent_queue); 4788 } 4789 } 4790 /* 4791 if(ccnt) { 4792 printf("Freed %d from sent_queue\n", ccnt); 4793 ccnt = 0; 4794 } 4795 */ 4796 /* control queue MAY not be empty */ 4797 if (!TAILQ_EMPTY(&asoc->control_send_queue)) { 4798 chk = TAILQ_FIRST(&asoc->control_send_queue); 4799 while (chk) { 4800 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4801 if (chk->data) { 4802 sctp_m_freem(chk->data); 4803 chk->data = NULL; 4804 } 4805 if (chk->holds_key_ref) 4806 sctp_auth_key_release(stcb, chk->auth_keyid); 4807 ccnt++; 4808 sctp_free_remote_addr(chk->whoTo); 4809 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4810 SCTP_DECR_CHK_COUNT(); 4811 /* sa_ignore FREED_MEMORY */ 4812 chk = TAILQ_FIRST(&asoc->control_send_queue); 4813 } 4814 } 4815 /* 4816 if(ccnt) { 4817 printf("Freed %d from ctrl_queue\n", ccnt); 4818 ccnt = 0; 4819 } 4820 */ 4821 4822 /* ASCONF queue MAY not be empty */ 4823 if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) { 4824 chk = TAILQ_FIRST(&asoc->asconf_send_queue); 4825 while (chk) { 4826 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4827 if (chk->data) { 4828 sctp_m_freem(chk->data); 4829 chk->data = NULL; 4830 } 4831 if (chk->holds_key_ref) 4832 sctp_auth_key_release(stcb, chk->auth_keyid); 4833 ccnt++; 4834 sctp_free_remote_addr(chk->whoTo); 4835 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4836 SCTP_DECR_CHK_COUNT(); 4837 /* sa_ignore FREED_MEMORY */ 4838 chk = TAILQ_FIRST(&asoc->asconf_send_queue); 4839 } 4840 } 4841 /* 4842 if(ccnt) { 4843 printf("Freed %d from asconf_queue\n", ccnt); 4844 ccnt = 0; 4845 } 4846 */ 4847 if (!TAILQ_EMPTY(&asoc->reasmqueue)) { 4848 chk = TAILQ_FIRST(&asoc->reasmqueue); 4849 while (chk) { 4850 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4851 if (chk->data) { 4852 sctp_m_freem(chk->data); 4853 chk->data = NULL; 4854 } 4855 if (chk->holds_key_ref) 4856 sctp_auth_key_release(stcb, chk->auth_keyid); 4857 sctp_free_remote_addr(chk->whoTo); 4858 ccnt++; 4859 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4860 SCTP_DECR_CHK_COUNT(); 4861 /* sa_ignore FREED_MEMORY */ 4862 chk = TAILQ_FIRST(&asoc->reasmqueue); 4863 } 4864 } 4865 /* 4866 if(ccnt) { 4867 printf("Freed %d from reasm_queue\n", ccnt); 4868 ccnt = 0; 4869 } 4870 */ 4871 if (asoc->mapping_array) { 4872 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4873 asoc->mapping_array = NULL; 4874 } 4875 /* the stream outs */ 4876 if (asoc->strmout) { 4877 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4878 asoc->strmout = NULL; 4879 } 4880 asoc->streamoutcnt = 0; 4881 if (asoc->strmin) { 4882 struct sctp_queued_to_read *ctl; 4883 4884 for (i = 0; i < asoc->streamincnt; i++) { 4885 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { 4886 /* We have somethings on the streamin queue */ 4887 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4888 while (ctl) { 4889 TAILQ_REMOVE(&asoc->strmin[i].inqueue, 4890 ctl, next); 4891 sctp_free_remote_addr(ctl->whoFrom); 4892 if (ctl->data) { 4893 sctp_m_freem(ctl->data); 4894 ctl->data = NULL; 4895 } 4896 /* 4897 * We don't free the address here 4898 * since all the net's were freed 4899 * above. 4900 */ 4901 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 4902 SCTP_DECR_READQ_COUNT(); 4903 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4904 } 4905 } 4906 } 4907 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4908 asoc->strmin = NULL; 4909 } 4910 asoc->streamincnt = 0; 4911 while (!TAILQ_EMPTY(&asoc->nets)) { 4912 /* sa_ignore FREED_MEMORY */ 4913 net = TAILQ_FIRST(&asoc->nets); 4914 /* pull from list */ 4915 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) { 4916 #ifdef INVARIANTS 4917 panic("no net's left alloc'ed, or list points to itself"); 4918 #endif 4919 break; 4920 } 4921 prev = net; 4922 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4923 sctp_free_remote_addr(net); 4924 } 4925 4926 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) { 4927 /* sa_ignore FREED_MEMORY */ 4928 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); 4929 sctp_remove_laddr(laddr); 4930 } 4931 4932 /* pending asconf (address) parameters */ 4933 while (!TAILQ_EMPTY(&asoc->asconf_queue)) { 4934 /* sa_ignore FREED_MEMORY */ 4935 aparam = TAILQ_FIRST(&asoc->asconf_queue); 4936 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 4937 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 4938 } 4939 while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) { 4940 /* sa_ignore FREED_MEMORY */ 4941 aack = TAILQ_FIRST(&asoc->asconf_ack_sent); 4942 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 4943 if (aack->data != NULL) { 4944 sctp_m_freem(aack->data); 4945 } 4946 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 4947 } 4948 /* clean up auth stuff */ 4949 if (asoc->local_hmacs) 4950 sctp_free_hmaclist(asoc->local_hmacs); 4951 if (asoc->peer_hmacs) 4952 sctp_free_hmaclist(asoc->peer_hmacs); 4953 4954 if (asoc->local_auth_chunks) 4955 sctp_free_chunklist(asoc->local_auth_chunks); 4956 if (asoc->peer_auth_chunks) 4957 sctp_free_chunklist(asoc->peer_auth_chunks); 4958 4959 sctp_free_authinfo(&asoc->authinfo); 4960 4961 shared_key = LIST_FIRST(&asoc->shared_keys); 4962 while (shared_key) { 4963 LIST_REMOVE(shared_key, next); 4964 sctp_free_sharedkey(shared_key); 4965 /* sa_ignore FREED_MEMORY */ 4966 shared_key = LIST_FIRST(&asoc->shared_keys); 4967 } 4968 4969 /* Insert new items here :> */ 4970 4971 /* Get rid of LOCK */ 4972 SCTP_TCB_LOCK_DESTROY(stcb); 4973 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4974 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4975 SCTP_INP_INFO_WUNLOCK(); 4976 SCTP_INP_RLOCK(inp); 4977 } 4978 #ifdef SCTP_TRACK_FREED_ASOCS 4979 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4980 /* now clean up the tasoc itself */ 4981 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4982 SCTP_DECR_ASOC_COUNT(); 4983 } else { 4984 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 4985 } 4986 #else 4987 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4988 SCTP_DECR_ASOC_COUNT(); 4989 #endif 4990 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4991 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4992 /* 4993 * If its NOT the inp_free calling us AND sctp_close 4994 * as been called, we call back... 4995 */ 4996 SCTP_INP_RUNLOCK(inp); 4997 /* 4998 * This will start the kill timer (if we are the 4999 * lastone) since we hold an increment yet. But this 5000 * is the only safe way to do this since otherwise 5001 * if the socket closes at the same time we are here 5002 * we might collide in the cleanup. 5003 */ 5004 sctp_inpcb_free(inp, 5005 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5006 SCTP_CALLED_DIRECTLY_NOCMPSET); 5007 SCTP_INP_DECR_REF(inp); 5008 goto out_of; 5009 } else { 5010 /* The socket is still open. */ 5011 SCTP_INP_DECR_REF(inp); 5012 } 5013 } 5014 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5015 SCTP_INP_RUNLOCK(inp); 5016 } 5017 out_of: 5018 /* destroyed the asoc */ 5019 #ifdef SCTP_LOG_CLOSING 5020 sctp_log_closing(inp, NULL, 11); 5021 #endif 5022 return (1); 5023 } 5024 5025 5026 5027 /* 5028 * determine if a destination is "reachable" based upon the addresses bound 5029 * to the current endpoint (e.g. only v4 or v6 currently bound) 5030 */ 5031 /* 5032 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5033 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5034 * types bound as its endpoint 5035 */ 5036 int 5037 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5038 { 5039 struct sctp_inpcb *inp; 5040 int answer; 5041 5042 /* 5043 * No locks here, the TCB, in all cases is already locked and an 5044 * assoc is up. There is either a INP lock by the caller applied (in 5045 * asconf case when deleting an address) or NOT in the HB case, 5046 * however if HB then the INP increment is up and the INP will not 5047 * be removed (on top of the fact that we have a TCB lock). So we 5048 * only want to read the sctp_flags, which is either bound-all or 5049 * not.. no protection needed since once an assoc is up you can't be 5050 * changing your binding. 5051 */ 5052 inp = stcb->sctp_ep; 5053 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5054 /* if bound all, destination is not restricted */ 5055 /* 5056 * RRS: Question during lock work: Is this correct? If you 5057 * are bound-all you still might need to obey the V4--V6 5058 * flags??? IMO this bound-all stuff needs to be removed! 5059 */ 5060 return (1); 5061 } 5062 /* NOTE: all "scope" checks are done when local addresses are added */ 5063 if (destaddr->sa_family == AF_INET6) { 5064 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5065 } else if (destaddr->sa_family == AF_INET) { 5066 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5067 } else { 5068 /* invalid family, so it's unreachable */ 5069 answer = 0; 5070 } 5071 return (answer); 5072 } 5073 5074 /* 5075 * update the inp_vflags on an endpoint 5076 */ 5077 static void 5078 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5079 { 5080 struct sctp_laddr *laddr; 5081 5082 /* first clear the flag */ 5083 inp->ip_inp.inp.inp_vflag = 0; 5084 /* set the flag based on addresses on the ep list */ 5085 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5086 if (laddr->ifa == NULL) { 5087 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5088 __FUNCTION__); 5089 continue; 5090 } 5091 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5092 continue; 5093 } 5094 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 5095 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5096 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 5097 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5098 } 5099 } 5100 } 5101 5102 /* 5103 * Add the address to the endpoint local address list There is nothing to be 5104 * done if we are bound to all addresses 5105 */ 5106 void 5107 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5108 { 5109 struct sctp_laddr *laddr; 5110 int fnd, error = 0; 5111 5112 fnd = 0; 5113 5114 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5115 /* You are already bound to all. You have it already */ 5116 return; 5117 } 5118 if (ifa->address.sa.sa_family == AF_INET6) { 5119 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5120 /* Can't bind a non-useable addr. */ 5121 return; 5122 } 5123 } 5124 /* first, is it already present? */ 5125 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5126 if (laddr->ifa == ifa) { 5127 fnd = 1; 5128 break; 5129 } 5130 } 5131 5132 if (fnd == 0) { 5133 /* Not in the ep list */ 5134 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5135 if (error != 0) 5136 return; 5137 inp->laddr_count++; 5138 /* update inp_vflag flags */ 5139 if (ifa->address.sa.sa_family == AF_INET6) { 5140 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5141 } else if (ifa->address.sa.sa_family == AF_INET) { 5142 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5143 } 5144 } 5145 return; 5146 } 5147 5148 5149 /* 5150 * select a new (hopefully reachable) destination net (should only be used 5151 * when we deleted an ep addr that is the only usable source address to reach 5152 * the destination net) 5153 */ 5154 static void 5155 sctp_select_primary_destination(struct sctp_tcb *stcb) 5156 { 5157 struct sctp_nets *net; 5158 5159 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5160 /* for now, we'll just pick the first reachable one we find */ 5161 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5162 continue; 5163 if (sctp_destination_is_reachable(stcb, 5164 (struct sockaddr *)&net->ro._l_addr)) { 5165 /* found a reachable destination */ 5166 stcb->asoc.primary_destination = net; 5167 } 5168 } 5169 /* I can't there from here! ...we're gonna die shortly... */ 5170 } 5171 5172 5173 /* 5174 * Delete the address from the endpoint local address list There is nothing 5175 * to be done if we are bound to all addresses 5176 */ 5177 void 5178 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5179 { 5180 struct sctp_laddr *laddr; 5181 int fnd; 5182 5183 fnd = 0; 5184 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5185 /* You are already bound to all. You have it already */ 5186 return; 5187 } 5188 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5189 if (laddr->ifa == ifa) { 5190 fnd = 1; 5191 break; 5192 } 5193 } 5194 if (fnd && (inp->laddr_count < 2)) { 5195 /* can't delete unless there are at LEAST 2 addresses */ 5196 return; 5197 } 5198 if (fnd) { 5199 /* 5200 * clean up any use of this address go through our 5201 * associations and clear any last_used_address that match 5202 * this one for each assoc, see if a new primary_destination 5203 * is needed 5204 */ 5205 struct sctp_tcb *stcb; 5206 5207 /* clean up "next_addr_touse" */ 5208 if (inp->next_addr_touse == laddr) 5209 /* delete this address */ 5210 inp->next_addr_touse = NULL; 5211 5212 /* clean up "last_used_address" */ 5213 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5214 struct sctp_nets *net; 5215 5216 SCTP_TCB_LOCK(stcb); 5217 if (stcb->asoc.last_used_address == laddr) 5218 /* delete this address */ 5219 stcb->asoc.last_used_address = NULL; 5220 /* 5221 * Now spin through all the nets and purge any ref 5222 * to laddr 5223 */ 5224 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5225 if (net->ro._s_addr && 5226 (net->ro._s_addr->ifa == laddr->ifa)) { 5227 /* Yep, purge src address selected */ 5228 sctp_rtentry_t *rt; 5229 5230 /* delete this address if cached */ 5231 rt = net->ro.ro_rt; 5232 if (rt != NULL) { 5233 RTFREE(rt); 5234 net->ro.ro_rt = NULL; 5235 } 5236 sctp_free_ifa(net->ro._s_addr); 5237 net->ro._s_addr = NULL; 5238 net->src_addr_selected = 0; 5239 } 5240 } 5241 SCTP_TCB_UNLOCK(stcb); 5242 } /* for each tcb */ 5243 /* remove it from the ep list */ 5244 sctp_remove_laddr(laddr); 5245 inp->laddr_count--; 5246 /* update inp_vflag flags */ 5247 sctp_update_ep_vflag(inp); 5248 } 5249 return; 5250 } 5251 5252 /* 5253 * Add the address to the TCB local address restricted list. 5254 * This is a "pending" address list (eg. addresses waiting for an 5255 * ASCONF-ACK response) and cannot be used as a valid source address. 5256 */ 5257 void 5258 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5259 { 5260 struct sctp_inpcb *inp; 5261 struct sctp_laddr *laddr; 5262 struct sctpladdr *list; 5263 5264 /* 5265 * Assumes TCB is locked.. and possibly the INP. May need to 5266 * confirm/fix that if we need it and is not the case. 5267 */ 5268 list = &stcb->asoc.sctp_restricted_addrs; 5269 5270 inp = stcb->sctp_ep; 5271 if (ifa->address.sa.sa_family == AF_INET6) { 5272 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5273 /* Can't bind a non-existent addr. */ 5274 return; 5275 } 5276 } 5277 /* does the address already exist? */ 5278 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5279 if (laddr->ifa == ifa) { 5280 return; 5281 } 5282 } 5283 5284 /* add to the list */ 5285 (void)sctp_insert_laddr(list, ifa, 0); 5286 return; 5287 } 5288 5289 /* 5290 * insert an laddr entry with the given ifa for the desired list 5291 */ 5292 int 5293 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5294 { 5295 struct sctp_laddr *laddr; 5296 5297 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5298 if (laddr == NULL) { 5299 /* out of memory? */ 5300 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5301 return (EINVAL); 5302 } 5303 SCTP_INCR_LADDR_COUNT(); 5304 bzero(laddr, sizeof(*laddr)); 5305 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5306 laddr->ifa = ifa; 5307 laddr->action = act; 5308 atomic_add_int(&ifa->refcount, 1); 5309 /* insert it */ 5310 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5311 5312 return (0); 5313 } 5314 5315 /* 5316 * Remove an laddr entry from the local address list (on an assoc) 5317 */ 5318 void 5319 sctp_remove_laddr(struct sctp_laddr *laddr) 5320 { 5321 5322 /* remove from the list */ 5323 LIST_REMOVE(laddr, sctp_nxt_addr); 5324 sctp_free_ifa(laddr->ifa); 5325 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5326 SCTP_DECR_LADDR_COUNT(); 5327 } 5328 5329 /* 5330 * Remove a local address from the TCB local address restricted list 5331 */ 5332 void 5333 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5334 { 5335 struct sctp_inpcb *inp; 5336 struct sctp_laddr *laddr; 5337 5338 /* 5339 * This is called by asconf work. It is assumed that a) The TCB is 5340 * locked and b) The INP is locked. This is true in as much as I can 5341 * trace through the entry asconf code where I did these locks. 5342 * Again, the ASCONF code is a bit different in that it does lock 5343 * the INP during its work often times. This must be since we don't 5344 * want other proc's looking up things while what they are looking 5345 * up is changing :-D 5346 */ 5347 5348 inp = stcb->sctp_ep; 5349 /* if subset bound and don't allow ASCONF's, can't delete last */ 5350 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5351 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5352 if (stcb->sctp_ep->laddr_count < 2) { 5353 /* can't delete last address */ 5354 return; 5355 } 5356 } 5357 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5358 /* remove the address if it exists */ 5359 if (laddr->ifa == NULL) 5360 continue; 5361 if (laddr->ifa == ifa) { 5362 sctp_remove_laddr(laddr); 5363 return; 5364 } 5365 } 5366 5367 /* address not found! */ 5368 return; 5369 } 5370 5371 /* 5372 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5373 */ 5374 /* sysctl */ 5375 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5376 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5377 5378 void 5379 sctp_pcb_init() 5380 { 5381 /* 5382 * SCTP initialization for the PCB structures should be called by 5383 * the sctp_init() funciton. 5384 */ 5385 int i; 5386 struct timeval tv; 5387 5388 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5389 /* error I was called twice */ 5390 return; 5391 } 5392 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5393 5394 #if defined(SCTP_LOCAL_TRACE_BUF) 5395 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5396 #endif 5397 (void)SCTP_GETTIME_TIMEVAL(&tv); 5398 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5399 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5400 /* init the empty list of (All) Endpoints */ 5401 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5402 5403 /* init the iterator head */ 5404 TAILQ_INIT(&SCTP_BASE_INFO(iteratorhead)); 5405 5406 /* init the hash table of endpoints */ 5407 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5408 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5409 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5410 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5411 &SCTP_BASE_INFO(hashasocmark)); 5412 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5413 &SCTP_BASE_INFO(hashmark)); 5414 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5415 &SCTP_BASE_INFO(hashtcpmark)); 5416 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5417 5418 5419 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5420 &SCTP_BASE_INFO(hashvrfmark)); 5421 5422 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5423 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5424 /* init the zones */ 5425 /* 5426 * FIX ME: Should check for NULL returns, but if it does fail we are 5427 * doomed to panic anyways... add later maybe. 5428 */ 5429 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5430 sizeof(struct sctp_inpcb), maxsockets); 5431 5432 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5433 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5434 5435 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5436 sizeof(struct sctp_laddr), 5437 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5438 5439 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5440 sizeof(struct sctp_nets), 5441 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5442 5443 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5444 sizeof(struct sctp_tmit_chunk), 5445 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5446 5447 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5448 sizeof(struct sctp_queued_to_read), 5449 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5450 5451 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5452 sizeof(struct sctp_stream_queue_pending), 5453 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5454 5455 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5456 sizeof(struct sctp_asconf), 5457 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5458 5459 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5460 sizeof(struct sctp_asconf_ack), 5461 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5462 5463 5464 /* Master Lock INIT for info structure */ 5465 SCTP_INP_INFO_LOCK_INIT(); 5466 SCTP_STATLOG_INIT_LOCK(); 5467 SCTP_ITERATOR_LOCK_INIT(); 5468 5469 SCTP_IPI_COUNT_INIT(); 5470 SCTP_IPI_ADDR_INIT(); 5471 SCTP_IPI_ITERATOR_WQ_INIT(); 5472 #ifdef SCTP_PACKET_LOGGING 5473 SCTP_IP_PKTLOG_INIT(); 5474 #endif 5475 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5476 5477 /* not sure if we need all the counts */ 5478 SCTP_BASE_INFO(ipi_count_ep) = 0; 5479 /* assoc/tcb zone info */ 5480 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5481 /* local addrlist zone info */ 5482 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5483 /* remote addrlist zone info */ 5484 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5485 /* chunk info */ 5486 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5487 5488 /* socket queue zone info */ 5489 SCTP_BASE_INFO(ipi_count_readq) = 0; 5490 5491 /* stream out queue cont */ 5492 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5493 5494 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5495 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5496 5497 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5498 5499 /* Init the TIMEWAIT list */ 5500 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5501 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait[i])); 5502 } 5503 5504 #if defined(SCTP_USE_THREAD_BASED_ITERATOR) 5505 SCTP_BASE_INFO(iterator_running) = 0; 5506 SCTP_BASE_INFO(threads_must_exit) = 0; 5507 sctp_startup_iterator(); 5508 #endif 5509 5510 /* 5511 * INIT the default VRF which for BSD is the only one, other O/S's 5512 * may have more. But initially they must start with one and then 5513 * add the VRF's as addresses are added. 5514 */ 5515 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5516 5517 } 5518 5519 /* 5520 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5521 */ 5522 void 5523 sctp_pcb_finish(void) 5524 { 5525 struct sctp_vrflist *vrf_bucket; 5526 struct sctp_vrf *vrf; 5527 struct sctp_ifn *ifn; 5528 struct sctp_ifa *ifa; 5529 struct sctpvtaghead *chain; 5530 struct sctp_tagblock *twait_block, *prev_twait_block; 5531 int i; 5532 5533 /* 5534 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5535 * destroyed first). 5536 */ 5537 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5538 vrf = LIST_FIRST(vrf_bucket); 5539 while (vrf) { 5540 ifn = LIST_FIRST(&vrf->ifnlist); 5541 while (ifn) { 5542 ifa = LIST_FIRST(&ifn->ifalist); 5543 while (ifa) { 5544 /* free the ifa */ 5545 LIST_REMOVE(ifa, next_bucket); 5546 LIST_REMOVE(ifa, next_ifa); 5547 SCTP_FREE(ifa, SCTP_M_IFA); 5548 ifa = LIST_FIRST(&ifn->ifalist); 5549 } 5550 /* free the ifn */ 5551 LIST_REMOVE(ifn, next_bucket); 5552 LIST_REMOVE(ifn, next_ifn); 5553 SCTP_FREE(ifn, SCTP_M_IFN); 5554 ifn = LIST_FIRST(&vrf->ifnlist); 5555 } 5556 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5557 /* free the vrf */ 5558 LIST_REMOVE(vrf, next_vrf); 5559 SCTP_FREE(vrf, SCTP_M_VRF); 5560 vrf = LIST_FIRST(vrf_bucket); 5561 } 5562 /* free the vrf hashes */ 5563 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5564 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5565 5566 /* 5567 * free the TIMEWAIT list elements malloc'd in the function 5568 * sctp_add_vtag_to_timewait()... 5569 */ 5570 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5571 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5572 if (!SCTP_LIST_EMPTY(chain)) { 5573 prev_twait_block = NULL; 5574 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5575 if (prev_twait_block) { 5576 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5577 } 5578 prev_twait_block = twait_block; 5579 } 5580 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5581 } 5582 } 5583 5584 /* free the locks and mutexes */ 5585 #ifdef SCTP_PACKET_LOGGING 5586 SCTP_IP_PKTLOG_DESTROY(); 5587 5588 #endif 5589 SCTP_IPI_ITERATOR_WQ_DESTROY(); 5590 SCTP_IPI_ADDR_DESTROY(); 5591 SCTP_ITERATOR_LOCK_DESTROY(); 5592 SCTP_STATLOG_DESTROY(); 5593 SCTP_INP_INFO_LOCK_DESTROY(); 5594 5595 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5596 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5597 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5598 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5599 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5600 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5601 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5602 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5603 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5604 /* Get rid of other stuff to */ 5605 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5606 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5607 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5608 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5609 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5610 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5611 5612 } 5613 5614 5615 int 5616 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5617 int iphlen, int offset, int limit, struct sctphdr *sh, 5618 struct sockaddr *altsa) 5619 { 5620 /* 5621 * grub through the INIT pulling addresses and loading them to the 5622 * nets structure in the asoc. The from address in the mbuf should 5623 * also be loaded (if it is not already). This routine can be called 5624 * with either INIT or INIT-ACK's as long as the m points to the IP 5625 * packet and the offset points to the beginning of the parameters. 5626 */ 5627 struct sctp_inpcb *inp, *l_inp; 5628 struct sctp_nets *net, *net_tmp; 5629 struct ip *iph; 5630 struct sctp_paramhdr *phdr, parm_buf; 5631 struct sctp_tcb *stcb_tmp; 5632 uint16_t ptype, plen; 5633 struct sockaddr *sa; 5634 struct sockaddr_storage dest_store; 5635 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 5636 struct sockaddr_in sin; 5637 struct sockaddr_in6 sin6; 5638 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5639 struct sctp_auth_random *p_random = NULL; 5640 uint16_t random_len = 0; 5641 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5642 struct sctp_auth_hmac_algo *hmacs = NULL; 5643 uint16_t hmacs_len = 0; 5644 uint8_t saw_asconf = 0; 5645 uint8_t saw_asconf_ack = 0; 5646 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 5647 struct sctp_auth_chunk_list *chunks = NULL; 5648 uint16_t num_chunks = 0; 5649 sctp_key_t *new_key; 5650 uint32_t keylen; 5651 int got_random = 0, got_hmacs = 0, got_chklist = 0; 5652 5653 /* First get the destination address setup too. */ 5654 memset(&sin, 0, sizeof(sin)); 5655 memset(&sin6, 0, sizeof(sin6)); 5656 5657 sin.sin_family = AF_INET; 5658 sin.sin_len = sizeof(sin); 5659 sin.sin_port = stcb->rport; 5660 5661 sin6.sin6_family = AF_INET6; 5662 sin6.sin6_len = sizeof(struct sockaddr_in6); 5663 sin6.sin6_port = stcb->rport; 5664 if (altsa == NULL) { 5665 iph = mtod(m, struct ip *); 5666 switch (iph->ip_v) { 5667 case IPVERSION: 5668 { 5669 /* its IPv4 */ 5670 struct sockaddr_in *sin_2; 5671 5672 sin_2 = (struct sockaddr_in *)(local_sa); 5673 memset(sin_2, 0, sizeof(sin)); 5674 sin_2->sin_family = AF_INET; 5675 sin_2->sin_len = sizeof(sin); 5676 sin_2->sin_port = sh->dest_port; 5677 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 5678 sin.sin_addr = iph->ip_src; 5679 sa = (struct sockaddr *)&sin; 5680 break; 5681 } 5682 #ifdef INET6 5683 case IPV6_VERSION >> 4: 5684 { 5685 /* its IPv6 */ 5686 struct ip6_hdr *ip6; 5687 struct sockaddr_in6 *sin6_2; 5688 5689 ip6 = mtod(m, struct ip6_hdr *); 5690 sin6_2 = (struct sockaddr_in6 *)(local_sa); 5691 memset(sin6_2, 0, sizeof(sin6)); 5692 sin6_2->sin6_family = AF_INET6; 5693 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 5694 sin6_2->sin6_port = sh->dest_port; 5695 sin6.sin6_addr = ip6->ip6_src; 5696 sa = (struct sockaddr *)&sin6; 5697 break; 5698 } 5699 #endif 5700 default: 5701 sa = NULL; 5702 break; 5703 } 5704 } else { 5705 /* 5706 * For cookies we use the src address NOT from the packet 5707 * but from the original INIT 5708 */ 5709 sa = altsa; 5710 } 5711 /* Turn off ECN until we get through all params */ 5712 stcb->asoc.ecn_allowed = 0; 5713 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5714 /* mark all addresses that we have currently on the list */ 5715 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 5716 } 5717 /* does the source address already exist? if so skip it */ 5718 l_inp = inp = stcb->sctp_ep; 5719 5720 atomic_add_int(&stcb->asoc.refcnt, 1); 5721 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 5722 atomic_add_int(&stcb->asoc.refcnt, -1); 5723 5724 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 5725 /* we must add the source address */ 5726 /* no scope set here since we have a tcb already. */ 5727 if ((sa->sa_family == AF_INET) && 5728 (stcb->asoc.ipv4_addr_legal)) { 5729 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 5730 return (-1); 5731 } 5732 } else if ((sa->sa_family == AF_INET6) && 5733 (stcb->asoc.ipv6_addr_legal)) { 5734 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 5735 return (-2); 5736 } 5737 } 5738 } else { 5739 if (net_tmp != NULL && stcb_tmp == stcb) { 5740 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 5741 } else if (stcb_tmp != stcb) { 5742 /* It belongs to another association? */ 5743 if (stcb_tmp) 5744 SCTP_TCB_UNLOCK(stcb_tmp); 5745 return (-3); 5746 } 5747 } 5748 if (stcb->asoc.state == 0) { 5749 /* the assoc was freed? */ 5750 return (-4); 5751 } 5752 /* 5753 * peer must explicitly turn this on. This may have been initialized 5754 * to be "on" in order to allow local addr changes while INIT's are 5755 * in flight. 5756 */ 5757 stcb->asoc.peer_supports_asconf = 0; 5758 /* now we must go through each of the params. */ 5759 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 5760 while (phdr) { 5761 ptype = ntohs(phdr->param_type); 5762 plen = ntohs(phdr->param_length); 5763 /* 5764 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 5765 * (int)plen); 5766 */ 5767 if (offset + plen > limit) { 5768 break; 5769 } 5770 if (plen == 0) { 5771 break; 5772 } 5773 if (ptype == SCTP_IPV4_ADDRESS) { 5774 if (stcb->asoc.ipv4_addr_legal) { 5775 struct sctp_ipv4addr_param *p4, p4_buf; 5776 5777 /* ok get the v4 address and check/add */ 5778 phdr = sctp_get_next_param(m, offset, 5779 (struct sctp_paramhdr *)&p4_buf, sizeof(p4_buf)); 5780 if (plen != sizeof(struct sctp_ipv4addr_param) || 5781 phdr == NULL) { 5782 return (-5); 5783 } 5784 p4 = (struct sctp_ipv4addr_param *)phdr; 5785 sin.sin_addr.s_addr = p4->addr; 5786 if (IN_MULTICAST(sin.sin_addr.s_addr)) { 5787 /* Skip multi-cast addresses */ 5788 goto next_param; 5789 } 5790 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 5791 (sin.sin_addr.s_addr == INADDR_ANY)) { 5792 goto next_param; 5793 } 5794 sa = (struct sockaddr *)&sin; 5795 inp = stcb->sctp_ep; 5796 atomic_add_int(&stcb->asoc.refcnt, 1); 5797 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5798 local_sa, stcb); 5799 atomic_add_int(&stcb->asoc.refcnt, -1); 5800 5801 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 5802 inp == NULL) { 5803 /* we must add the source address */ 5804 /* 5805 * no scope set since we have a tcb 5806 * already 5807 */ 5808 5809 /* 5810 * we must validate the state again 5811 * here 5812 */ 5813 add_it_now: 5814 if (stcb->asoc.state == 0) { 5815 /* the assoc was freed? */ 5816 return (-7); 5817 } 5818 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 5819 return (-8); 5820 } 5821 } else if (stcb_tmp == stcb) { 5822 if (stcb->asoc.state == 0) { 5823 /* the assoc was freed? */ 5824 return (-10); 5825 } 5826 if (net != NULL) { 5827 /* clear flag */ 5828 net->dest_state &= 5829 ~SCTP_ADDR_NOT_IN_ASSOC; 5830 } 5831 } else { 5832 /* 5833 * strange, address is in another 5834 * assoc? straighten out locks. 5835 */ 5836 if (stcb_tmp) { 5837 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 5838 /* 5839 * in setup state we 5840 * abort this guy 5841 */ 5842 sctp_abort_an_association(stcb_tmp->sctp_ep, 5843 stcb_tmp, 1, NULL, 0); 5844 goto add_it_now; 5845 } 5846 SCTP_TCB_UNLOCK(stcb_tmp); 5847 } 5848 if (stcb->asoc.state == 0) { 5849 /* the assoc was freed? */ 5850 return (-12); 5851 } 5852 return (-13); 5853 } 5854 } 5855 } else if (ptype == SCTP_IPV6_ADDRESS) { 5856 if (stcb->asoc.ipv6_addr_legal) { 5857 /* ok get the v6 address and check/add */ 5858 struct sctp_ipv6addr_param *p6, p6_buf; 5859 5860 phdr = sctp_get_next_param(m, offset, 5861 (struct sctp_paramhdr *)&p6_buf, sizeof(p6_buf)); 5862 if (plen != sizeof(struct sctp_ipv6addr_param) || 5863 phdr == NULL) { 5864 return (-14); 5865 } 5866 p6 = (struct sctp_ipv6addr_param *)phdr; 5867 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 5868 sizeof(p6->addr)); 5869 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 5870 /* Skip multi-cast addresses */ 5871 goto next_param; 5872 } 5873 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 5874 /* 5875 * Link local make no sense without 5876 * scope 5877 */ 5878 goto next_param; 5879 } 5880 sa = (struct sockaddr *)&sin6; 5881 inp = stcb->sctp_ep; 5882 atomic_add_int(&stcb->asoc.refcnt, 1); 5883 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5884 local_sa, stcb); 5885 atomic_add_int(&stcb->asoc.refcnt, -1); 5886 if (stcb_tmp == NULL && (inp == stcb->sctp_ep || 5887 inp == NULL)) { 5888 /* 5889 * we must validate the state again 5890 * here 5891 */ 5892 add_it_now6: 5893 if (stcb->asoc.state == 0) { 5894 /* the assoc was freed? */ 5895 return (-16); 5896 } 5897 /* 5898 * we must add the address, no scope 5899 * set 5900 */ 5901 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 5902 return (-17); 5903 } 5904 } else if (stcb_tmp == stcb) { 5905 /* 5906 * we must validate the state again 5907 * here 5908 */ 5909 if (stcb->asoc.state == 0) { 5910 /* the assoc was freed? */ 5911 return (-19); 5912 } 5913 if (net != NULL) { 5914 /* clear flag */ 5915 net->dest_state &= 5916 ~SCTP_ADDR_NOT_IN_ASSOC; 5917 } 5918 } else { 5919 /* 5920 * strange, address is in another 5921 * assoc? straighten out locks. 5922 */ 5923 if (stcb_tmp) 5924 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 5925 /* 5926 * in setup state we 5927 * abort this guy 5928 */ 5929 sctp_abort_an_association(stcb_tmp->sctp_ep, 5930 stcb_tmp, 1, NULL, 0); 5931 goto add_it_now6; 5932 } 5933 SCTP_TCB_UNLOCK(stcb_tmp); 5934 5935 if (stcb->asoc.state == 0) { 5936 /* the assoc was freed? */ 5937 return (-21); 5938 } 5939 return (-22); 5940 } 5941 } 5942 } else if (ptype == SCTP_ECN_CAPABLE) { 5943 stcb->asoc.ecn_allowed = 1; 5944 } else if (ptype == SCTP_ULP_ADAPTATION) { 5945 if (stcb->asoc.state != SCTP_STATE_OPEN) { 5946 struct sctp_adaptation_layer_indication ai, 5947 *aip; 5948 5949 phdr = sctp_get_next_param(m, offset, 5950 (struct sctp_paramhdr *)&ai, sizeof(ai)); 5951 aip = (struct sctp_adaptation_layer_indication *)phdr; 5952 if (aip) { 5953 stcb->asoc.peers_adaptation = ntohl(aip->indication); 5954 stcb->asoc.adaptation_needed = 1; 5955 } 5956 } 5957 } else if (ptype == SCTP_SET_PRIM_ADDR) { 5958 struct sctp_asconf_addr_param lstore, *fee; 5959 struct sctp_asconf_addrv4_param *fii; 5960 int lptype; 5961 struct sockaddr *lsa = NULL; 5962 5963 stcb->asoc.peer_supports_asconf = 1; 5964 if (plen > sizeof(lstore)) { 5965 return (-23); 5966 } 5967 phdr = sctp_get_next_param(m, offset, 5968 (struct sctp_paramhdr *)&lstore, min(plen, sizeof(lstore))); 5969 if (phdr == NULL) { 5970 return (-24); 5971 } 5972 fee = (struct sctp_asconf_addr_param *)phdr; 5973 lptype = ntohs(fee->addrp.ph.param_type); 5974 if (lptype == SCTP_IPV4_ADDRESS) { 5975 if (plen != 5976 sizeof(struct sctp_asconf_addrv4_param)) { 5977 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 5978 (int)sizeof(struct sctp_asconf_addrv4_param), 5979 plen); 5980 } else { 5981 fii = (struct sctp_asconf_addrv4_param *)fee; 5982 sin.sin_addr.s_addr = fii->addrp.addr; 5983 lsa = (struct sockaddr *)&sin; 5984 } 5985 } else if (lptype == SCTP_IPV6_ADDRESS) { 5986 if (plen != 5987 sizeof(struct sctp_asconf_addr_param)) { 5988 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 5989 (int)sizeof(struct sctp_asconf_addr_param), 5990 plen); 5991 } else { 5992 memcpy(sin6.sin6_addr.s6_addr, 5993 fee->addrp.addr, 5994 sizeof(fee->addrp.addr)); 5995 lsa = (struct sockaddr *)&sin6; 5996 } 5997 } 5998 if (lsa) { 5999 (void)sctp_set_primary_addr(stcb, sa, NULL); 6000 } 6001 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6002 stcb->asoc.peer_supports_nat = 1; 6003 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6004 /* Peer supports pr-sctp */ 6005 stcb->asoc.peer_supports_prsctp = 1; 6006 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6007 /* A supported extension chunk */ 6008 struct sctp_supported_chunk_types_param *pr_supported; 6009 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6010 int num_ent, i; 6011 6012 phdr = sctp_get_next_param(m, offset, 6013 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6014 if (phdr == NULL) { 6015 return (-25); 6016 } 6017 stcb->asoc.peer_supports_asconf = 0; 6018 stcb->asoc.peer_supports_prsctp = 0; 6019 stcb->asoc.peer_supports_pktdrop = 0; 6020 stcb->asoc.peer_supports_strreset = 0; 6021 stcb->asoc.peer_supports_auth = 0; 6022 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6023 num_ent = plen - sizeof(struct sctp_paramhdr); 6024 for (i = 0; i < num_ent; i++) { 6025 switch (pr_supported->chunk_types[i]) { 6026 case SCTP_ASCONF: 6027 case SCTP_ASCONF_ACK: 6028 stcb->asoc.peer_supports_asconf = 1; 6029 break; 6030 case SCTP_FORWARD_CUM_TSN: 6031 stcb->asoc.peer_supports_prsctp = 1; 6032 break; 6033 case SCTP_PACKET_DROPPED: 6034 stcb->asoc.peer_supports_pktdrop = 1; 6035 break; 6036 case SCTP_STREAM_RESET: 6037 stcb->asoc.peer_supports_strreset = 1; 6038 break; 6039 case SCTP_AUTHENTICATION: 6040 stcb->asoc.peer_supports_auth = 1; 6041 break; 6042 default: 6043 /* one I have not learned yet */ 6044 break; 6045 6046 } 6047 } 6048 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 6049 /* Peer supports ECN-nonce */ 6050 stcb->asoc.peer_supports_ecn_nonce = 1; 6051 stcb->asoc.ecn_nonce_allowed = 1; 6052 } else if (ptype == SCTP_RANDOM) { 6053 if (plen > sizeof(random_store)) 6054 break; 6055 if (got_random) { 6056 /* already processed a RANDOM */ 6057 goto next_param; 6058 } 6059 phdr = sctp_get_next_param(m, offset, 6060 (struct sctp_paramhdr *)random_store, 6061 min(sizeof(random_store), plen)); 6062 if (phdr == NULL) 6063 return (-26); 6064 p_random = (struct sctp_auth_random *)phdr; 6065 random_len = plen - sizeof(*p_random); 6066 /* enforce the random length */ 6067 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6068 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6069 return (-27); 6070 } 6071 got_random = 1; 6072 } else if (ptype == SCTP_HMAC_LIST) { 6073 int num_hmacs; 6074 int i; 6075 6076 if (plen > sizeof(hmacs_store)) 6077 break; 6078 if (got_hmacs) { 6079 /* already processed a HMAC list */ 6080 goto next_param; 6081 } 6082 phdr = sctp_get_next_param(m, offset, 6083 (struct sctp_paramhdr *)hmacs_store, 6084 min(plen, sizeof(hmacs_store))); 6085 if (phdr == NULL) 6086 return (-28); 6087 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6088 hmacs_len = plen - sizeof(*hmacs); 6089 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6090 /* validate the hmac list */ 6091 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6092 return (-29); 6093 } 6094 if (stcb->asoc.peer_hmacs != NULL) 6095 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6096 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6097 if (stcb->asoc.peer_hmacs != NULL) { 6098 for (i = 0; i < num_hmacs; i++) { 6099 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6100 ntohs(hmacs->hmac_ids[i])); 6101 } 6102 } 6103 got_hmacs = 1; 6104 } else if (ptype == SCTP_CHUNK_LIST) { 6105 int i; 6106 6107 if (plen > sizeof(chunks_store)) 6108 break; 6109 if (got_chklist) { 6110 /* already processed a Chunks list */ 6111 goto next_param; 6112 } 6113 phdr = sctp_get_next_param(m, offset, 6114 (struct sctp_paramhdr *)chunks_store, 6115 min(plen, sizeof(chunks_store))); 6116 if (phdr == NULL) 6117 return (-30); 6118 chunks = (struct sctp_auth_chunk_list *)phdr; 6119 num_chunks = plen - sizeof(*chunks); 6120 if (stcb->asoc.peer_auth_chunks != NULL) 6121 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6122 else 6123 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6124 for (i = 0; i < num_chunks; i++) { 6125 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6126 stcb->asoc.peer_auth_chunks); 6127 /* record asconf/asconf-ack if listed */ 6128 if (chunks->chunk_types[i] == SCTP_ASCONF) 6129 saw_asconf = 1; 6130 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6131 saw_asconf_ack = 1; 6132 6133 } 6134 got_chklist = 1; 6135 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6136 (ptype == SCTP_STATE_COOKIE) || 6137 (ptype == SCTP_UNRECOG_PARAM) || 6138 (ptype == SCTP_COOKIE_PRESERVE) || 6139 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6140 (ptype == SCTP_ADD_IP_ADDRESS) || 6141 (ptype == SCTP_DEL_IP_ADDRESS) || 6142 (ptype == SCTP_ERROR_CAUSE_IND) || 6143 (ptype == SCTP_SUCCESS_REPORT)) { 6144 /* don't care */ ; 6145 } else { 6146 if ((ptype & 0x8000) == 0x0000) { 6147 /* 6148 * must stop processing the rest of the 6149 * param's. Any report bits were handled 6150 * with the call to 6151 * sctp_arethere_unrecognized_parameters() 6152 * when the INIT or INIT-ACK was first seen. 6153 */ 6154 break; 6155 } 6156 } 6157 next_param: 6158 offset += SCTP_SIZE32(plen); 6159 if (offset >= limit) { 6160 break; 6161 } 6162 phdr = sctp_get_next_param(m, offset, &parm_buf, 6163 sizeof(parm_buf)); 6164 } 6165 /* Now check to see if we need to purge any addresses */ 6166 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { 6167 net_tmp = TAILQ_NEXT(net, sctp_next); 6168 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6169 SCTP_ADDR_NOT_IN_ASSOC) { 6170 /* This address has been removed from the asoc */ 6171 /* remove and free it */ 6172 stcb->asoc.numnets--; 6173 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6174 sctp_free_remote_addr(net); 6175 if (net == stcb->asoc.primary_destination) { 6176 stcb->asoc.primary_destination = NULL; 6177 sctp_select_primary_destination(stcb); 6178 } 6179 } 6180 } 6181 /* validate authentication required parameters */ 6182 if (got_random && got_hmacs) { 6183 stcb->asoc.peer_supports_auth = 1; 6184 } else { 6185 stcb->asoc.peer_supports_auth = 0; 6186 } 6187 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6188 /* peer does not support auth but sent a chunks list? */ 6189 return (-31); 6190 } 6191 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6192 !stcb->asoc.peer_supports_auth) { 6193 /* peer supports asconf but not auth? */ 6194 return (-32); 6195 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6196 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6197 return (-33); 6198 } 6199 /* concatenate the full random key */ 6200 #ifdef SCTP_AUTH_DRAFT_04 6201 keylen = random_len; 6202 new_key = sctp_alloc_key(keylen); 6203 if (new_key != NULL) { 6204 /* copy in the RANDOM */ 6205 if (p_random != NULL) 6206 bcopy(p_random->random_data, new_key->key, random_len); 6207 } 6208 #else 6209 keylen = sizeof(*p_random) + random_len + sizeof(*chunks) + num_chunks + 6210 sizeof(*hmacs) + hmacs_len; 6211 new_key = sctp_alloc_key(keylen); 6212 if (new_key != NULL) { 6213 /* copy in the RANDOM */ 6214 if (p_random != NULL) { 6215 keylen = sizeof(*p_random) + random_len; 6216 bcopy(p_random, new_key->key, keylen); 6217 } 6218 /* append in the AUTH chunks */ 6219 if (chunks != NULL) { 6220 bcopy(chunks, new_key->key + keylen, 6221 sizeof(*chunks) + num_chunks); 6222 keylen += sizeof(*chunks) + num_chunks; 6223 } 6224 /* append in the HMACs */ 6225 if (hmacs != NULL) { 6226 bcopy(hmacs, new_key->key + keylen, 6227 sizeof(*hmacs) + hmacs_len); 6228 } 6229 } 6230 #endif 6231 else { 6232 /* failed to get memory for the key */ 6233 return (-34); 6234 } 6235 if (stcb->asoc.authinfo.peer_random != NULL) 6236 sctp_free_key(stcb->asoc.authinfo.peer_random); 6237 stcb->asoc.authinfo.peer_random = new_key; 6238 #ifdef SCTP_AUTH_DRAFT_04 6239 /* don't include the chunks and hmacs for draft -04 */ 6240 stcb->asoc.authinfo.peer_random->keylen = random_len; 6241 #endif 6242 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6243 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6244 6245 return (0); 6246 } 6247 6248 int 6249 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6250 struct sctp_nets *net) 6251 { 6252 /* make sure the requested primary address exists in the assoc */ 6253 if (net == NULL && sa) 6254 net = sctp_findnet(stcb, sa); 6255 6256 if (net == NULL) { 6257 /* didn't find the requested primary address! */ 6258 return (-1); 6259 } else { 6260 /* set the primary address */ 6261 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6262 /* Must be confirmed, so queue to set */ 6263 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6264 return (0); 6265 } 6266 stcb->asoc.primary_destination = net; 6267 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 6268 net = TAILQ_FIRST(&stcb->asoc.nets); 6269 if (net != stcb->asoc.primary_destination) { 6270 /* 6271 * first one on the list is NOT the primary 6272 * sctp_cmpaddr() is much more efficent if the 6273 * primary is the first on the list, make it so. 6274 */ 6275 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6276 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6277 } 6278 return (0); 6279 } 6280 } 6281 6282 int 6283 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6284 { 6285 /* 6286 * This function serves two purposes. It will see if a TAG can be 6287 * re-used and return 1 for yes it is ok and 0 for don't use that 6288 * tag. A secondary function it will do is purge out old tags that 6289 * can be removed. 6290 */ 6291 struct sctpvtaghead *chain; 6292 struct sctp_tagblock *twait_block; 6293 struct sctpasochead *head; 6294 struct sctp_tcb *stcb; 6295 int i; 6296 6297 SCTP_INP_INFO_RLOCK(); 6298 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6299 SCTP_BASE_INFO(hashasocmark))]; 6300 if (head == NULL) { 6301 /* invalid vtag */ 6302 goto skip_vtag_check; 6303 } 6304 LIST_FOREACH(stcb, head, sctp_asocs) { 6305 /* 6306 * We choose not to lock anything here. TCB's can't be 6307 * removed since we have the read lock, so they can't be 6308 * freed on us, same thing for the INP. I may be wrong with 6309 * this assumption, but we will go with it for now :-) 6310 */ 6311 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6312 continue; 6313 } 6314 if (stcb->asoc.my_vtag == tag) { 6315 /* candidate */ 6316 if (stcb->rport != rport) { 6317 continue; 6318 } 6319 if (stcb->sctp_ep->sctp_lport != lport) { 6320 continue; 6321 } 6322 /* Its a used tag set */ 6323 SCTP_INP_INFO_WUNLOCK(); 6324 return (0); 6325 } 6326 } 6327 skip_vtag_check: 6328 6329 chain = &SCTP_BASE_INFO(vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE))]; 6330 /* Now what about timed wait ? */ 6331 if (!SCTP_LIST_EMPTY(chain)) { 6332 /* 6333 * Block(s) are present, lets see if we have this tag in the 6334 * list 6335 */ 6336 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6337 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6338 if (twait_block->vtag_block[i].v_tag == 0) { 6339 /* not used */ 6340 continue; 6341 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6342 now->tv_sec) { 6343 /* Audit expires this guy */ 6344 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6345 twait_block->vtag_block[i].v_tag = 0; 6346 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6347 (twait_block->vtag_block[i].lport == lport) && 6348 (twait_block->vtag_block[i].rport == rport)) { 6349 /* Bad tag, sorry :< */ 6350 SCTP_INP_INFO_WUNLOCK(); 6351 return (0); 6352 } 6353 } 6354 } 6355 } 6356 SCTP_INP_INFO_RUNLOCK(); 6357 #ifdef MICHAELS_EXPERIMENT 6358 /*- 6359 * Not found, ok to use the tag, add it to the time wait hash 6360 * as well this will prevent two sucessive cookies from getting 6361 * the same tag or two inits sent quickly on multi-processors. 6362 * We only keep the tag for the life of a cookie and when we 6363 * add this tag to the assoc hash we need to purge it from 6364 * the t-wait hash. 6365 */ 6366 SCTP_INP_INFO_WLOCK(); 6367 if (save_in_twait) 6368 sctp_add_vtag_to_timewait(tag, TICKS_TO_SEC(inp->sctp_ep.def_cookie_life, lport, rport)); 6369 SCTP_INP_INFO_WUNLOCK(); 6370 #endif 6371 6372 return (1); 6373 } 6374 6375 6376 static sctp_assoc_t reneged_asoc_ids[256]; 6377 static uint8_t reneged_at = 0; 6378 6379 6380 static void 6381 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6382 { 6383 /* 6384 * We must hunt this association for MBUF's past the cumack (i.e. 6385 * out of order data that we can renege on). 6386 */ 6387 struct sctp_association *asoc; 6388 struct sctp_tmit_chunk *chk, *nchk; 6389 uint32_t cumulative_tsn_p1, tsn; 6390 struct sctp_queued_to_read *ctl, *nctl; 6391 int cnt, strmat, gap; 6392 6393 /* We look for anything larger than the cum-ack + 1 */ 6394 6395 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6396 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6397 return; 6398 } 6399 asoc = &stcb->asoc; 6400 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6401 /* none we can reneg on. */ 6402 return; 6403 } 6404 SCTP_STAT_INCR(sctps_protocol_drains_done); 6405 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6406 cnt = 0; 6407 /* First look in the re-assembly queue */ 6408 chk = TAILQ_FIRST(&asoc->reasmqueue); 6409 while (chk) { 6410 /* Get the next one */ 6411 nchk = TAILQ_NEXT(chk, sctp_next); 6412 if (compare_with_wrap(chk->rec.data.TSN_seq, 6413 cumulative_tsn_p1, MAX_TSN)) { 6414 /* Yep it is above cum-ack */ 6415 cnt++; 6416 tsn = chk->rec.data.TSN_seq; 6417 if (tsn >= asoc->mapping_array_base_tsn) { 6418 gap = tsn - asoc->mapping_array_base_tsn; 6419 } else { 6420 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 6421 tsn + 1; 6422 } 6423 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6424 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6425 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6426 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6427 if (chk->data) { 6428 sctp_m_freem(chk->data); 6429 chk->data = NULL; 6430 } 6431 sctp_free_a_chunk(stcb, chk); 6432 } 6433 chk = nchk; 6434 } 6435 /* Ok that was fun, now we will drain all the inbound streams? */ 6436 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6437 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); 6438 while (ctl) { 6439 nctl = TAILQ_NEXT(ctl, next); 6440 if (compare_with_wrap(ctl->sinfo_tsn, 6441 cumulative_tsn_p1, MAX_TSN)) { 6442 /* Yep it is above cum-ack */ 6443 cnt++; 6444 tsn = ctl->sinfo_tsn; 6445 if (tsn >= asoc->mapping_array_base_tsn) { 6446 gap = tsn - 6447 asoc->mapping_array_base_tsn; 6448 } else { 6449 gap = (MAX_TSN - 6450 asoc->mapping_array_base_tsn) + 6451 tsn + 1; 6452 } 6453 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6454 sctp_ucount_decr(asoc->cnt_on_all_streams); 6455 6456 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, 6457 gap); 6458 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, 6459 ctl, next); 6460 if (ctl->data) { 6461 sctp_m_freem(ctl->data); 6462 ctl->data = NULL; 6463 } 6464 sctp_free_remote_addr(ctl->whoFrom); 6465 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6466 SCTP_DECR_READQ_COUNT(); 6467 } 6468 ctl = nctl; 6469 } 6470 } 6471 /* 6472 * Question, should we go through the delivery queue? The only 6473 * reason things are on here is the app not reading OR a p-d-api up. 6474 * An attacker COULD send enough in to initiate the PD-API and then 6475 * send a bunch of stuff to other streams... these would wind up on 6476 * the delivery queue.. and then we would not get to them. But in 6477 * order to do this I then have to back-track and un-deliver 6478 * sequence numbers in streams.. el-yucko. I think for now we will 6479 * NOT look at the delivery queue and leave it to be something to 6480 * consider later. An alternative would be to abort the P-D-API with 6481 * a notification and then deliver the data.... Or another method 6482 * might be to keep track of how many times the situation occurs and 6483 * if we see a possible attack underway just abort the association. 6484 */ 6485 #ifdef SCTP_DEBUG 6486 if (cnt) { 6487 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6488 } 6489 #endif 6490 if (cnt) { 6491 /* 6492 * Now do we need to find a new 6493 * asoc->highest_tsn_inside_map? 6494 */ 6495 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) { 6496 gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn; 6497 } else { 6498 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 6499 asoc->highest_tsn_inside_map + 1; 6500 } 6501 if (gap >= (asoc->mapping_array_size << 3)) { 6502 /* 6503 * Something bad happened or cum-ack and high were 6504 * behind the base, but if so earlier checks should 6505 * have found NO data... wierd... we will start at 6506 * end of mapping array. 6507 */ 6508 SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n", 6509 (int)gap, 6510 (int)(asoc->mapping_array_size << 3), 6511 (int)asoc->highest_tsn_inside_map); 6512 gap = asoc->mapping_array_size << 3; 6513 } 6514 while (gap > 0) { 6515 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6516 /* found the new highest */ 6517 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap; 6518 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) { 6519 sctp_log_map(0, 8, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT); 6520 } 6521 break; 6522 } 6523 gap--; 6524 } 6525 if (gap == 0) { 6526 /* Nothing left in map */ 6527 memset(asoc->mapping_array, 0, asoc->mapping_array_size); 6528 asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1; 6529 asoc->highest_tsn_inside_map = asoc->cumulative_tsn; 6530 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) { 6531 sctp_log_map(0, 9, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT); 6532 } 6533 } 6534 asoc->last_revoke_count = cnt; 6535 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6536 /* sa_ignore NO_NULL_CHK */ 6537 sctp_send_sack(stcb); 6538 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6539 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 6540 reneged_at++; 6541 } 6542 /* 6543 * Another issue, in un-setting the TSN's in the mapping array we 6544 * DID NOT adjust the higest_tsn marker. This will cause one of two 6545 * things to occur. It may cause us to do extra work in checking for 6546 * our mapping array movement. More importantly it may cause us to 6547 * SACK every datagram. This may not be a bad thing though since we 6548 * will recover once we get our cum-ack above and all this stuff we 6549 * dumped recovered. 6550 */ 6551 } 6552 6553 void 6554 sctp_drain() 6555 { 6556 /* 6557 * We must walk the PCB lists for ALL associations here. The system 6558 * is LOW on MBUF's and needs help. This is where reneging will 6559 * occur. We really hope this does NOT happen! 6560 */ 6561 struct sctp_inpcb *inp; 6562 struct sctp_tcb *stcb; 6563 6564 SCTP_INP_INFO_RLOCK(); 6565 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6566 /* For each endpoint */ 6567 SCTP_INP_RLOCK(inp); 6568 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6569 /* For each association */ 6570 SCTP_TCB_LOCK(stcb); 6571 sctp_drain_mbufs(inp, stcb); 6572 SCTP_TCB_UNLOCK(stcb); 6573 } 6574 SCTP_INP_RUNLOCK(inp); 6575 } 6576 SCTP_INP_INFO_RUNLOCK(); 6577 } 6578 6579 /* 6580 * start a new iterator 6581 * iterates through all endpoints and associations based on the pcb_state 6582 * flags and asoc_state. "af" (mandatory) is executed for all matching 6583 * assocs and "ef" (optional) is executed when the iterator completes. 6584 * "inpf" (optional) is executed for each new endpoint as it is being 6585 * iterated through. inpe (optional) is called when the inp completes 6586 * its way through all the stcbs. 6587 */ 6588 int 6589 sctp_initiate_iterator(inp_func inpf, 6590 asoc_func af, 6591 inp_func inpe, 6592 uint32_t pcb_state, 6593 uint32_t pcb_features, 6594 uint32_t asoc_state, 6595 void *argp, 6596 uint32_t argi, 6597 end_func ef, 6598 struct sctp_inpcb *s_inp, 6599 uint8_t chunk_output_off) 6600 { 6601 struct sctp_iterator *it = NULL; 6602 6603 if (af == NULL) { 6604 return (-1); 6605 } 6606 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6607 SCTP_M_ITER); 6608 if (it == NULL) { 6609 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6610 return (ENOMEM); 6611 } 6612 memset(it, 0, sizeof(*it)); 6613 it->function_assoc = af; 6614 it->function_inp = inpf; 6615 if (inpf) 6616 it->done_current_ep = 0; 6617 else 6618 it->done_current_ep = 1; 6619 it->function_atend = ef; 6620 it->pointer = argp; 6621 it->val = argi; 6622 it->pcb_flags = pcb_state; 6623 it->pcb_features = pcb_features; 6624 it->asoc_state = asoc_state; 6625 it->function_inp_end = inpe; 6626 it->no_chunk_output = chunk_output_off; 6627 if (s_inp) { 6628 it->inp = s_inp; 6629 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6630 } else { 6631 SCTP_INP_INFO_RLOCK(); 6632 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6633 6634 SCTP_INP_INFO_RUNLOCK(); 6635 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6636 6637 } 6638 SCTP_IPI_ITERATOR_WQ_LOCK(); 6639 if (it->inp) { 6640 SCTP_INP_INCR_REF(it->inp); 6641 } 6642 TAILQ_INSERT_TAIL(&SCTP_BASE_INFO(iteratorhead), it, sctp_nxt_itr); 6643 #if defined(SCTP_USE_THREAD_BASED_ITERATOR) 6644 if (SCTP_BASE_INFO(iterator_running) == 0) { 6645 sctp_wakeup_iterator(); 6646 } 6647 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6648 #else 6649 if (it->inp) 6650 SCTP_INP_DECR_REF(it->inp); 6651 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6652 /* Init the timer */ 6653 SCTP_OS_TIMER_INIT(&it->tmr.timer); 6654 /* add to the list of all iterators */ 6655 sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it, 6656 NULL, NULL); 6657 #endif 6658 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6659 return (0); 6660 } 6661