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 if (stcb->asoc.in_asocid_hash) { 2508 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2509 } 2510 /* Now insert the new_inp into the TCP connected hash */ 2511 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), 2512 SCTP_BASE_INFO(hashtcpmark))]; 2513 2514 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2515 /* Its safe to access */ 2516 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2517 2518 /* Now move the tcb into the endpoint list */ 2519 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2520 /* 2521 * Question, do we even need to worry about the ep-hash since we 2522 * only have one connection? Probably not :> so lets get rid of it 2523 * and not suck up any kernel memory in that. 2524 */ 2525 if (stcb->asoc.in_asocid_hash) { 2526 struct sctpasochead *lhd; 2527 2528 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2529 new_inp->hashasocidmark)]; 2530 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2531 } 2532 /* Ok. Let's restart timer. */ 2533 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2534 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2535 stcb, net); 2536 } 2537 2538 SCTP_INP_INFO_WUNLOCK(); 2539 if (new_inp->sctp_tcbhash != NULL) { 2540 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2541 new_inp->sctp_tcbhash = NULL; 2542 } 2543 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2544 /* Subset bound, so copy in the laddr list from the old_inp */ 2545 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2546 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2547 if (laddr == NULL) { 2548 /* 2549 * Gak, what can we do? This assoc is really 2550 * HOSED. We probably should send an abort 2551 * here. 2552 */ 2553 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2554 continue; 2555 } 2556 SCTP_INCR_LADDR_COUNT(); 2557 bzero(laddr, sizeof(*laddr)); 2558 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2559 laddr->ifa = oladdr->ifa; 2560 atomic_add_int(&laddr->ifa->refcount, 1); 2561 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2562 sctp_nxt_addr); 2563 new_inp->laddr_count++; 2564 } 2565 } 2566 /* 2567 * Now any running timers need to be adjusted since we really don't 2568 * care if they are running or not just blast in the new_inp into 2569 * all of them. 2570 */ 2571 2572 stcb->asoc.hb_timer.ep = (void *)new_inp; 2573 stcb->asoc.dack_timer.ep = (void *)new_inp; 2574 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2575 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2576 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2577 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2578 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2579 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2580 /* now what about the nets? */ 2581 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2582 net->pmtu_timer.ep = (void *)new_inp; 2583 net->rxt_timer.ep = (void *)new_inp; 2584 net->fr_timer.ep = (void *)new_inp; 2585 } 2586 SCTP_INP_WUNLOCK(new_inp); 2587 SCTP_INP_WUNLOCK(old_inp); 2588 } 2589 2590 2591 2592 2593 /* sctp_ifap is used to bypass normal local address validation checks */ 2594 int 2595 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2596 struct sctp_ifa *sctp_ifap, struct thread *p) 2597 { 2598 /* bind a ep to a socket address */ 2599 struct sctppcbhead *head; 2600 struct sctp_inpcb *inp, *inp_tmp; 2601 struct inpcb *ip_inp; 2602 int port_reuse_active = 0; 2603 int bindall; 2604 uint16_t lport; 2605 int error; 2606 uint32_t vrf_id; 2607 2608 lport = 0; 2609 error = 0; 2610 bindall = 1; 2611 inp = (struct sctp_inpcb *)so->so_pcb; 2612 ip_inp = (struct inpcb *)so->so_pcb; 2613 #ifdef SCTP_DEBUG 2614 if (addr) { 2615 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2616 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2617 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2618 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2619 } 2620 #endif 2621 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2622 /* already did a bind, subsequent binds NOT allowed ! */ 2623 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2624 return (EINVAL); 2625 } 2626 #ifdef INVARIANTS 2627 if (p == NULL) 2628 panic("null proc/thread"); 2629 #endif 2630 if (addr != NULL) { 2631 switch (addr->sa_family) { 2632 case AF_INET: 2633 { 2634 struct sockaddr_in *sin; 2635 2636 /* IPV6_V6ONLY socket? */ 2637 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2638 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2639 return (EINVAL); 2640 } 2641 if (addr->sa_len != sizeof(*sin)) { 2642 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2643 return (EINVAL); 2644 } 2645 sin = (struct sockaddr_in *)addr; 2646 lport = sin->sin_port; 2647 /* 2648 * For LOOPBACK the prison_local_ip4() call 2649 * will transmute the ip address to the 2650 * proper value. 2651 */ 2652 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2653 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2654 return (error); 2655 } 2656 if (sin->sin_addr.s_addr != INADDR_ANY) { 2657 bindall = 0; 2658 } 2659 break; 2660 } 2661 #ifdef INET6 2662 case AF_INET6: 2663 { 2664 /* 2665 * Only for pure IPv6 Address. (No IPv4 2666 * Mapped!) 2667 */ 2668 struct sockaddr_in6 *sin6; 2669 2670 sin6 = (struct sockaddr_in6 *)addr; 2671 2672 if (addr->sa_len != sizeof(*sin6)) { 2673 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2674 return (EINVAL); 2675 } 2676 lport = sin6->sin6_port; 2677 2678 /* 2679 * For LOOPBACK the prison_local_ip6() call 2680 * will transmute the ipv6 address to the 2681 * proper value. 2682 */ 2683 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2684 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2685 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2686 return (error); 2687 } 2688 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2689 bindall = 0; 2690 /* KAME hack: embed scopeid */ 2691 if (sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)) != 0) { 2692 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2693 return (EINVAL); 2694 } 2695 } 2696 /* this must be cleared for ifa_ifwithaddr() */ 2697 sin6->sin6_scope_id = 0; 2698 break; 2699 } 2700 #endif 2701 default: 2702 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2703 return (EAFNOSUPPORT); 2704 } 2705 } 2706 SCTP_INP_INFO_WLOCK(); 2707 SCTP_INP_WLOCK(inp); 2708 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2709 vrf_id = inp->def_vrf_id; 2710 2711 /* increase our count due to the unlock we do */ 2712 SCTP_INP_INCR_REF(inp); 2713 if (lport) { 2714 /* 2715 * Did the caller specify a port? if so we must see if a ep 2716 * already has this one bound. 2717 */ 2718 /* got to be root to get at low ports */ 2719 if (ntohs(lport) < IPPORT_RESERVED) { 2720 if (p && (error = 2721 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2722 )) { 2723 SCTP_INP_DECR_REF(inp); 2724 SCTP_INP_WUNLOCK(inp); 2725 SCTP_INP_INFO_WUNLOCK(); 2726 return (error); 2727 } 2728 } 2729 if (p == NULL) { 2730 SCTP_INP_DECR_REF(inp); 2731 SCTP_INP_WUNLOCK(inp); 2732 SCTP_INP_INFO_WUNLOCK(); 2733 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2734 return (error); 2735 } 2736 SCTP_INP_WUNLOCK(inp); 2737 if (bindall) { 2738 vrf_id = inp->def_vrf_id; 2739 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2740 if (inp_tmp != NULL) { 2741 /* 2742 * lock guy returned and lower count note 2743 * that we are not bound so inp_tmp should 2744 * NEVER be inp. And it is this inp 2745 * (inp_tmp) that gets the reference bump, 2746 * so we must lower it. 2747 */ 2748 SCTP_INP_DECR_REF(inp_tmp); 2749 /* unlock info */ 2750 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2751 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2752 /* 2753 * Ok, must be one-2-one and 2754 * allowing port re-use 2755 */ 2756 port_reuse_active = 1; 2757 goto continue_anyway; 2758 } 2759 SCTP_INP_DECR_REF(inp); 2760 SCTP_INP_INFO_WUNLOCK(); 2761 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2762 return (EADDRINUSE); 2763 } 2764 } else { 2765 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2766 if (inp_tmp != NULL) { 2767 /* 2768 * lock guy returned and lower count note 2769 * that we are not bound so inp_tmp should 2770 * NEVER be inp. And it is this inp 2771 * (inp_tmp) that gets the reference bump, 2772 * so we must lower it. 2773 */ 2774 SCTP_INP_DECR_REF(inp_tmp); 2775 /* unlock info */ 2776 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2777 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2778 /* 2779 * Ok, must be one-2-one and 2780 * allowing port re-use 2781 */ 2782 port_reuse_active = 1; 2783 goto continue_anyway; 2784 } 2785 SCTP_INP_DECR_REF(inp); 2786 SCTP_INP_INFO_WUNLOCK(); 2787 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2788 return (EADDRINUSE); 2789 } 2790 } 2791 continue_anyway: 2792 SCTP_INP_WLOCK(inp); 2793 if (bindall) { 2794 /* verify that no lport is not used by a singleton */ 2795 if ((port_reuse_active == 0) && 2796 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2797 ) { 2798 /* Sorry someone already has this one bound */ 2799 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2800 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2801 port_reuse_active = 1; 2802 } else { 2803 SCTP_INP_DECR_REF(inp); 2804 SCTP_INP_WUNLOCK(inp); 2805 SCTP_INP_INFO_WUNLOCK(); 2806 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2807 return (EADDRINUSE); 2808 } 2809 } 2810 } 2811 } else { 2812 uint16_t first, last, candidate; 2813 uint16_t count; 2814 int done; 2815 2816 if (ip_inp->inp_flags & INP_HIGHPORT) { 2817 first = MODULE_GLOBAL(MOD_INET, ipport_hifirstauto); 2818 last = MODULE_GLOBAL(MOD_INET, ipport_hilastauto); 2819 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2820 if (p && (error = 2821 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2822 )) { 2823 SCTP_INP_DECR_REF(inp); 2824 SCTP_INP_WUNLOCK(inp); 2825 SCTP_INP_INFO_WUNLOCK(); 2826 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2827 return (error); 2828 } 2829 first = MODULE_GLOBAL(MOD_INET, ipport_lowfirstauto); 2830 last = MODULE_GLOBAL(MOD_INET, ipport_lowlastauto); 2831 } else { 2832 first = MODULE_GLOBAL(MOD_INET, ipport_firstauto); 2833 last = MODULE_GLOBAL(MOD_INET, ipport_lastauto); 2834 } 2835 if (first > last) { 2836 uint16_t temp; 2837 2838 temp = first; 2839 first = last; 2840 last = temp; 2841 } 2842 count = last - first + 1; /* number of candidates */ 2843 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2844 2845 done = 0; 2846 while (!done) { 2847 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2848 done = 1; 2849 } 2850 if (!done) { 2851 if (--count == 0) { 2852 SCTP_INP_DECR_REF(inp); 2853 SCTP_INP_WUNLOCK(inp); 2854 SCTP_INP_INFO_WUNLOCK(); 2855 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2856 return (EADDRINUSE); 2857 } 2858 if (candidate == last) 2859 candidate = first; 2860 else 2861 candidate = candidate + 1; 2862 } 2863 } 2864 lport = htons(candidate); 2865 } 2866 SCTP_INP_DECR_REF(inp); 2867 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2868 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2869 /* 2870 * this really should not happen. The guy did a non-blocking 2871 * bind and then did a close at the same time. 2872 */ 2873 SCTP_INP_WUNLOCK(inp); 2874 SCTP_INP_INFO_WUNLOCK(); 2875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2876 return (EINVAL); 2877 } 2878 /* ok we look clear to give out this port, so lets setup the binding */ 2879 if (bindall) { 2880 /* binding to all addresses, so just set in the proper flags */ 2881 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2882 /* set the automatic addr changes from kernel flag */ 2883 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2884 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2885 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2886 } else { 2887 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2888 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2889 } 2890 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2891 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2892 } else { 2893 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2894 } 2895 /* 2896 * set the automatic mobility_base from kernel flag (by 2897 * micchie) 2898 */ 2899 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 2900 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 2901 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2902 } else { 2903 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 2904 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2905 } 2906 /* 2907 * set the automatic mobility_fasthandoff from kernel flag 2908 * (by micchie) 2909 */ 2910 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 2911 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 2912 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2913 } else { 2914 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 2915 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2916 } 2917 } else { 2918 /* 2919 * bind specific, make sure flags is off and add a new 2920 * address structure to the sctp_addr_list inside the ep 2921 * structure. 2922 * 2923 * We will need to allocate one and insert it at the head. The 2924 * socketopt call can just insert new addresses in there as 2925 * well. It will also have to do the embed scope kame hack 2926 * too (before adding). 2927 */ 2928 struct sctp_ifa *ifa; 2929 struct sockaddr_storage store_sa; 2930 2931 memset(&store_sa, 0, sizeof(store_sa)); 2932 if (addr->sa_family == AF_INET) { 2933 struct sockaddr_in *sin; 2934 2935 sin = (struct sockaddr_in *)&store_sa; 2936 memcpy(sin, addr, sizeof(struct sockaddr_in)); 2937 sin->sin_port = 0; 2938 } else if (addr->sa_family == AF_INET6) { 2939 struct sockaddr_in6 *sin6; 2940 2941 sin6 = (struct sockaddr_in6 *)&store_sa; 2942 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 2943 sin6->sin6_port = 0; 2944 } 2945 /* 2946 * first find the interface with the bound address need to 2947 * zero out the port to find the address! yuck! can't do 2948 * this earlier since need port for sctp_pcb_findep() 2949 */ 2950 if (sctp_ifap != NULL) 2951 ifa = sctp_ifap; 2952 else { 2953 /* 2954 * Note for BSD we hit here always other O/S's will 2955 * pass things in via the sctp_ifap argument 2956 * (Panda). 2957 */ 2958 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 2959 vrf_id, SCTP_ADDR_NOT_LOCKED); 2960 } 2961 if (ifa == NULL) { 2962 /* Can't find an interface with that address */ 2963 SCTP_INP_WUNLOCK(inp); 2964 SCTP_INP_INFO_WUNLOCK(); 2965 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 2966 return (EADDRNOTAVAIL); 2967 } 2968 if (addr->sa_family == AF_INET6) { 2969 /* GAK, more FIXME IFA lock? */ 2970 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 2971 /* Can't bind a non-existent addr. */ 2972 SCTP_INP_WUNLOCK(inp); 2973 SCTP_INP_INFO_WUNLOCK(); 2974 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2975 return (EINVAL); 2976 } 2977 } 2978 /* we're not bound all */ 2979 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 2980 /* allow bindx() to send ASCONF's for binding changes */ 2981 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2982 /* clear automatic addr changes from kernel flag */ 2983 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2984 2985 /* add this address to the endpoint list */ 2986 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 2987 if (error != 0) { 2988 SCTP_INP_WUNLOCK(inp); 2989 SCTP_INP_INFO_WUNLOCK(); 2990 return (error); 2991 } 2992 inp->laddr_count++; 2993 } 2994 /* find the bucket */ 2995 if (port_reuse_active) { 2996 /* Put it into tcp 1-2-1 hash */ 2997 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), 2998 SCTP_BASE_INFO(hashtcpmark))]; 2999 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3000 } else { 3001 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 3002 SCTP_BASE_INFO(hashmark))]; 3003 } 3004 /* put it in the bucket */ 3005 LIST_INSERT_HEAD(head, inp, sctp_hash); 3006 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3007 head, ntohs(lport), port_reuse_active); 3008 /* set in the port */ 3009 inp->sctp_lport = lport; 3010 3011 /* turn off just the unbound flag */ 3012 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3013 SCTP_INP_WUNLOCK(inp); 3014 SCTP_INP_INFO_WUNLOCK(); 3015 return (0); 3016 } 3017 3018 3019 static void 3020 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp, struct sctp_inpcb *inp_next) 3021 { 3022 struct sctp_iterator *it; 3023 3024 /* 3025 * We enter with the only the ITERATOR_LOCK in place and a write 3026 * lock on the inp_info stuff. 3027 */ 3028 3029 /* 3030 * Go through all iterators, we must do this since it is possible 3031 * that some iterator does NOT have the lock, but is waiting for it. 3032 * And the one that had the lock has either moved in the last 3033 * iteration or we just cleared it above. We need to find all of 3034 * those guys. The list of iterators should never be very big 3035 * though. 3036 */ 3037 TAILQ_FOREACH(it, &SCTP_BASE_INFO(iteratorhead), sctp_nxt_itr) { 3038 if (it == inp->inp_starting_point_for_iterator) 3039 /* skip this guy, he's special */ 3040 continue; 3041 if (it->inp == inp) { 3042 /* 3043 * This is tricky and we DON'T lock the iterator. 3044 * Reason is he's running but waiting for me since 3045 * inp->inp_starting_point_for_iterator has the lock 3046 * on me (the guy above we skipped). This tells us 3047 * its is not running but waiting for 3048 * inp->inp_starting_point_for_iterator to be 3049 * released by the guy that does have our INP in a 3050 * lock. 3051 */ 3052 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3053 it->inp = NULL; 3054 it->stcb = NULL; 3055 } else { 3056 /* set him up to do the next guy not me */ 3057 it->inp = inp_next; 3058 it->stcb = NULL; 3059 } 3060 } 3061 } 3062 it = inp->inp_starting_point_for_iterator; 3063 if (it) { 3064 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3065 it->inp = NULL; 3066 } else { 3067 it->inp = inp_next; 3068 } 3069 it->stcb = NULL; 3070 } 3071 } 3072 3073 /* release sctp_inpcb unbind the port */ 3074 void 3075 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3076 { 3077 /* 3078 * Here we free a endpoint. We must find it (if it is in the Hash 3079 * table) and remove it from there. Then we must also find it in the 3080 * overall list and remove it from there. After all removals are 3081 * complete then any timer has to be stopped. Then start the actual 3082 * freeing. a) Any local lists. b) Any associations. c) The hash of 3083 * all associations. d) finally the ep itself. 3084 */ 3085 struct sctp_pcb *m; 3086 struct sctp_inpcb *inp_save; 3087 struct sctp_tcb *asoc, *nasoc; 3088 struct sctp_laddr *laddr, *nladdr; 3089 struct inpcb *ip_pcb; 3090 struct socket *so; 3091 3092 struct sctp_queued_to_read *sq; 3093 3094 3095 int cnt; 3096 sctp_sharedkey_t *shared_key; 3097 3098 3099 #ifdef SCTP_LOG_CLOSING 3100 sctp_log_closing(inp, NULL, 0); 3101 #endif 3102 SCTP_ITERATOR_LOCK(); 3103 so = inp->sctp_socket; 3104 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3105 /* been here before.. eeks.. get out of here */ 3106 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3107 SCTP_ITERATOR_UNLOCK(); 3108 #ifdef SCTP_LOG_CLOSING 3109 sctp_log_closing(inp, NULL, 1); 3110 #endif 3111 return; 3112 } 3113 SCTP_ASOC_CREATE_LOCK(inp); 3114 SCTP_INP_INFO_WLOCK(); 3115 3116 SCTP_INP_WLOCK(inp); 3117 /* First time through we have the socket lock, after that no more. */ 3118 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3119 /* 3120 * Once we are in we can remove the flag from = 1 is only 3121 * passed from the actual closing routines that are called 3122 * via the sockets layer. 3123 */ 3124 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3125 /* socket is gone, so no more wakeups allowed */ 3126 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3127 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3128 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3129 } 3130 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3131 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3132 3133 if (inp->control) { 3134 sctp_m_freem(inp->control); 3135 inp->control = NULL; 3136 } 3137 if (inp->pkt) { 3138 sctp_m_freem(inp->pkt); 3139 inp->pkt = NULL; 3140 } 3141 m = &inp->sctp_ep; 3142 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3143 * here but I will be nice :> (i.e. 3144 * ip_pcb = ep;) */ 3145 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3146 int cnt_in_sd; 3147 3148 cnt_in_sd = 0; 3149 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 3150 asoc = nasoc) { 3151 SCTP_TCB_LOCK(asoc); 3152 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3153 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3154 /* Skip guys being freed */ 3155 /* asoc->sctp_socket = NULL; FIXME MT */ 3156 cnt_in_sd++; 3157 SCTP_TCB_UNLOCK(asoc); 3158 continue; 3159 } 3160 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3161 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) { 3162 /* 3163 * If we have data in queue, we don't want 3164 * to just free since the app may have done, 3165 * send()/close or connect/send/close. And 3166 * it wants the data to get across first. 3167 */ 3168 /* Just abandon things in the front states */ 3169 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3170 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3171 cnt_in_sd++; 3172 } 3173 continue; 3174 } 3175 /* Disconnect the socket please */ 3176 asoc->sctp_socket = NULL; 3177 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3178 if ((asoc->asoc.size_on_reasm_queue > 0) || 3179 (asoc->asoc.control_pdapi) || 3180 (asoc->asoc.size_on_all_streams > 0) || 3181 (so && (so->so_rcv.sb_cc > 0)) 3182 ) { 3183 /* Left with Data unread */ 3184 struct mbuf *op_err; 3185 3186 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3187 0, M_DONTWAIT, 1, MT_DATA); 3188 if (op_err) { 3189 /* Fill in the user initiated abort */ 3190 struct sctp_paramhdr *ph; 3191 uint32_t *ippp; 3192 3193 SCTP_BUF_LEN(op_err) = 3194 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3195 ph = mtod(op_err, 3196 struct sctp_paramhdr *); 3197 ph->param_type = htons( 3198 SCTP_CAUSE_USER_INITIATED_ABT); 3199 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3200 ippp = (uint32_t *) (ph + 1); 3201 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3202 } 3203 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3204 #if defined(SCTP_PANIC_ON_ABORT) 3205 panic("inpcb_free does an abort"); 3206 #endif 3207 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3208 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3209 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3210 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3211 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3212 } 3213 if (sctp_free_assoc(inp, asoc, 3214 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3215 cnt_in_sd++; 3216 } 3217 continue; 3218 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3219 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3220 (asoc->asoc.stream_queue_cnt == 0) 3221 ) { 3222 if (asoc->asoc.locked_on_sending) { 3223 goto abort_anyway; 3224 } 3225 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3226 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3227 /* 3228 * there is nothing queued to send, 3229 * so I send shutdown 3230 */ 3231 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 3232 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3233 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3234 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3235 } 3236 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3237 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3238 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3239 asoc->asoc.primary_destination); 3240 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3241 asoc->asoc.primary_destination); 3242 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3243 } 3244 } else { 3245 /* mark into shutdown pending */ 3246 struct sctp_stream_queue_pending *sp; 3247 3248 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3249 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3250 asoc->asoc.primary_destination); 3251 if (asoc->asoc.locked_on_sending) { 3252 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3253 sctp_streamhead); 3254 if (sp == NULL) { 3255 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3256 asoc->asoc.locked_on_sending, 3257 asoc->asoc.locked_on_sending->stream_no); 3258 } else { 3259 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3260 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3261 } 3262 } 3263 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3264 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3265 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3266 struct mbuf *op_err; 3267 3268 abort_anyway: 3269 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3270 0, M_DONTWAIT, 1, MT_DATA); 3271 if (op_err) { 3272 /* 3273 * Fill in the user 3274 * initiated abort 3275 */ 3276 struct sctp_paramhdr *ph; 3277 uint32_t *ippp; 3278 3279 SCTP_BUF_LEN(op_err) = 3280 (sizeof(struct sctp_paramhdr) + 3281 sizeof(uint32_t)); 3282 ph = mtod(op_err, 3283 struct sctp_paramhdr *); 3284 ph->param_type = htons( 3285 SCTP_CAUSE_USER_INITIATED_ABT); 3286 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3287 ippp = (uint32_t *) (ph + 1); 3288 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3289 } 3290 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3291 #if defined(SCTP_PANIC_ON_ABORT) 3292 panic("inpcb_free does an abort"); 3293 #endif 3294 3295 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3296 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3297 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3298 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3299 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3300 } 3301 if (sctp_free_assoc(inp, asoc, 3302 SCTP_PCBFREE_NOFORCE, 3303 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3304 cnt_in_sd++; 3305 } 3306 continue; 3307 } else { 3308 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3309 } 3310 } 3311 cnt_in_sd++; 3312 SCTP_TCB_UNLOCK(asoc); 3313 } 3314 /* now is there some left in our SHUTDOWN state? */ 3315 if (cnt_in_sd) { 3316 SCTP_INP_WUNLOCK(inp); 3317 SCTP_ASOC_CREATE_UNLOCK(inp); 3318 SCTP_INP_INFO_WUNLOCK(); 3319 SCTP_ITERATOR_UNLOCK(); 3320 #ifdef SCTP_LOG_CLOSING 3321 sctp_log_closing(inp, NULL, 2); 3322 #endif 3323 inp->sctp_socket = NULL; 3324 return; 3325 } 3326 } 3327 inp->sctp_socket = NULL; 3328 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3329 SCTP_PCB_FLAGS_UNBOUND) { 3330 /* 3331 * ok, this guy has been bound. It's port is somewhere in 3332 * the SCTP_BASE_INFO(hash table). Remove it! 3333 */ 3334 LIST_REMOVE(inp, sctp_hash); 3335 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3336 } 3337 /* 3338 * If there is a timer running to kill us, forget it, since it may 3339 * have a contest on the INP lock.. which would cause us to die ... 3340 */ 3341 cnt = 0; 3342 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 3343 asoc = nasoc) { 3344 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3345 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3346 cnt++; 3347 continue; 3348 } 3349 /* Free associations that are NOT killing us */ 3350 SCTP_TCB_LOCK(asoc); 3351 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3352 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3353 struct mbuf *op_err; 3354 uint32_t *ippp; 3355 3356 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3357 0, M_DONTWAIT, 1, MT_DATA); 3358 if (op_err) { 3359 /* Fill in the user initiated abort */ 3360 struct sctp_paramhdr *ph; 3361 3362 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3363 sizeof(uint32_t)); 3364 ph = mtod(op_err, struct sctp_paramhdr *); 3365 ph->param_type = htons( 3366 SCTP_CAUSE_USER_INITIATED_ABT); 3367 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3368 ippp = (uint32_t *) (ph + 1); 3369 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3370 3371 } 3372 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3373 #if defined(SCTP_PANIC_ON_ABORT) 3374 panic("inpcb_free does an abort"); 3375 #endif 3376 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3377 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3378 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3379 cnt++; 3380 SCTP_TCB_UNLOCK(asoc); 3381 continue; 3382 } 3383 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3384 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3385 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3386 } 3387 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3388 cnt++; 3389 } 3390 } 3391 if (cnt) { 3392 /* Ok we have someone out there that will kill us */ 3393 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3394 SCTP_INP_WUNLOCK(inp); 3395 SCTP_ASOC_CREATE_UNLOCK(inp); 3396 SCTP_INP_INFO_WUNLOCK(); 3397 SCTP_ITERATOR_UNLOCK(); 3398 #ifdef SCTP_LOG_CLOSING 3399 sctp_log_closing(inp, NULL, 3); 3400 #endif 3401 return; 3402 } 3403 if ((inp->refcount) || (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3404 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3405 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3406 SCTP_INP_WUNLOCK(inp); 3407 SCTP_ASOC_CREATE_UNLOCK(inp); 3408 SCTP_INP_INFO_WUNLOCK(); 3409 SCTP_ITERATOR_UNLOCK(); 3410 #ifdef SCTP_LOG_CLOSING 3411 sctp_log_closing(inp, NULL, 4); 3412 #endif 3413 return; 3414 } 3415 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3416 inp->sctp_ep.signature_change.type = 0; 3417 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3418 3419 #ifdef SCTP_LOG_CLOSING 3420 sctp_log_closing(inp, NULL, 5); 3421 #endif 3422 3423 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3424 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NONE; 3425 /* Clear the read queue */ 3426 if ((inp->sctp_asocidhash) != NULL) { 3427 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3428 inp->sctp_asocidhash = NULL; 3429 } 3430 /* sa_ignore FREED_MEMORY */ 3431 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { 3432 /* Its only abandoned if it had data left */ 3433 if (sq->length) 3434 SCTP_STAT_INCR(sctps_left_abandon); 3435 3436 TAILQ_REMOVE(&inp->read_queue, sq, next); 3437 sctp_free_remote_addr(sq->whoFrom); 3438 if (so) 3439 so->so_rcv.sb_cc -= sq->length; 3440 if (sq->data) { 3441 sctp_m_freem(sq->data); 3442 sq->data = NULL; 3443 } 3444 /* 3445 * no need to free the net count, since at this point all 3446 * assoc's are gone. 3447 */ 3448 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3449 SCTP_DECR_READQ_COUNT(); 3450 } 3451 /* Now the sctp_pcb things */ 3452 /* 3453 * free each asoc if it is not already closed/free. we can't use the 3454 * macro here since le_next will get freed as part of the 3455 * sctp_free_assoc() call. 3456 */ 3457 cnt = 0; 3458 if (so) { 3459 #ifdef IPSEC 3460 ipsec_delete_pcbpolicy(ip_pcb); 3461 #endif /* IPSEC */ 3462 3463 /* Unlocks not needed since the socket is gone now */ 3464 } 3465 if (ip_pcb->inp_options) { 3466 (void)sctp_m_free(ip_pcb->inp_options); 3467 ip_pcb->inp_options = 0; 3468 } 3469 if (ip_pcb->inp_moptions) { 3470 inp_freemoptions(ip_pcb->inp_moptions); 3471 ip_pcb->inp_moptions = 0; 3472 } 3473 #ifdef INET6 3474 if (ip_pcb->inp_vflag & INP_IPV6) { 3475 struct in6pcb *in6p; 3476 3477 in6p = (struct in6pcb *)inp; 3478 ip6_freepcbopts(in6p->in6p_outputopts); 3479 } 3480 #endif /* INET6 */ 3481 ip_pcb->inp_vflag = 0; 3482 /* free up authentication fields */ 3483 if (inp->sctp_ep.local_auth_chunks != NULL) 3484 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3485 if (inp->sctp_ep.local_hmacs != NULL) 3486 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3487 3488 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 3489 while (shared_key) { 3490 LIST_REMOVE(shared_key, next); 3491 sctp_free_sharedkey(shared_key); 3492 /* sa_ignore FREED_MEMORY */ 3493 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 3494 } 3495 3496 inp_save = LIST_NEXT(inp, sctp_list); 3497 LIST_REMOVE(inp, sctp_list); 3498 3499 /* fix any iterators only after out of the list */ 3500 sctp_iterator_inp_being_freed(inp, inp_save); 3501 /* 3502 * if we have an address list the following will free the list of 3503 * ifaddr's that are set into this ep. Again macro limitations here, 3504 * since the LIST_FOREACH could be a bad idea. 3505 */ 3506 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; 3507 laddr = nladdr) { 3508 nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 3509 sctp_remove_laddr(laddr); 3510 } 3511 3512 #ifdef SCTP_TRACK_FREED_ASOCS 3513 /* TEMP CODE */ 3514 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; 3515 asoc = nasoc) { 3516 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3517 LIST_REMOVE(asoc, sctp_tcblist); 3518 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3519 SCTP_DECR_ASOC_COUNT(); 3520 } 3521 /* *** END TEMP CODE *** */ 3522 #endif 3523 /* Now lets see about freeing the EP hash table. */ 3524 if (inp->sctp_tcbhash != NULL) { 3525 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3526 inp->sctp_tcbhash = NULL; 3527 } 3528 /* Now we must put the ep memory back into the zone pool */ 3529 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3530 SCTP_INP_LOCK_DESTROY(inp); 3531 SCTP_INP_READ_DESTROY(inp); 3532 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3533 SCTP_INP_INFO_WUNLOCK(); 3534 SCTP_ITERATOR_UNLOCK(); 3535 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3536 SCTP_DECR_EP_COUNT(); 3537 } 3538 3539 3540 struct sctp_nets * 3541 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3542 { 3543 struct sctp_nets *net; 3544 3545 /* locate the address */ 3546 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3547 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3548 return (net); 3549 } 3550 return (NULL); 3551 } 3552 3553 3554 int 3555 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3556 { 3557 struct sctp_ifa *sctp_ifa; 3558 3559 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3560 if (sctp_ifa) { 3561 return (1); 3562 } else { 3563 return (0); 3564 } 3565 } 3566 3567 /* 3568 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3569 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3570 * stats of stuff. 3571 */ 3572 int 3573 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3574 int set_scope, int from) 3575 { 3576 /* 3577 * The following is redundant to the same lines in the 3578 * sctp_aloc_assoc() but is needed since other's call the add 3579 * address function 3580 */ 3581 struct sctp_nets *net, *netfirst; 3582 int addr_inscope; 3583 3584 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3585 from); 3586 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3587 3588 netfirst = sctp_findnet(stcb, newaddr); 3589 if (netfirst) { 3590 /* 3591 * Lie and return ok, we don't want to make the association 3592 * go away for this behavior. It will happen in the TCP 3593 * model in a connected socket. It does not reach the hash 3594 * table until after the association is built so it can't be 3595 * found. Mark as reachable, since the initial creation will 3596 * have been cleared and the NOT_IN_ASSOC flag will have 3597 * been added... and we don't want to end up removing it 3598 * back out. 3599 */ 3600 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3601 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3602 SCTP_ADDR_UNCONFIRMED); 3603 } else { 3604 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3605 } 3606 3607 return (0); 3608 } 3609 addr_inscope = 1; 3610 if (newaddr->sa_family == AF_INET) { 3611 struct sockaddr_in *sin; 3612 3613 sin = (struct sockaddr_in *)newaddr; 3614 if (sin->sin_addr.s_addr == 0) { 3615 /* Invalid address */ 3616 return (-1); 3617 } 3618 /* zero out the bzero area */ 3619 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3620 3621 /* assure len is set */ 3622 sin->sin_len = sizeof(struct sockaddr_in); 3623 if (set_scope) { 3624 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3625 stcb->ipv4_local_scope = 1; 3626 #else 3627 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3628 stcb->asoc.ipv4_local_scope = 1; 3629 } 3630 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3631 } else { 3632 /* Validate the address is in scope */ 3633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3634 (stcb->asoc.ipv4_local_scope == 0)) { 3635 addr_inscope = 0; 3636 } 3637 } 3638 #ifdef INET6 3639 } else if (newaddr->sa_family == AF_INET6) { 3640 struct sockaddr_in6 *sin6; 3641 3642 sin6 = (struct sockaddr_in6 *)newaddr; 3643 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3644 /* Invalid address */ 3645 return (-1); 3646 } 3647 /* assure len is set */ 3648 sin6->sin6_len = sizeof(struct sockaddr_in6); 3649 if (set_scope) { 3650 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3651 stcb->asoc.loopback_scope = 1; 3652 stcb->asoc.local_scope = 0; 3653 stcb->asoc.ipv4_local_scope = 1; 3654 stcb->asoc.site_scope = 1; 3655 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3656 /* 3657 * If the new destination is a LINK_LOCAL we 3658 * must have common site scope. Don't set 3659 * the local scope since we may not share 3660 * all links, only loopback can do this. 3661 * Links on the local network would also be 3662 * on our private network for v4 too. 3663 */ 3664 stcb->asoc.ipv4_local_scope = 1; 3665 stcb->asoc.site_scope = 1; 3666 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3667 /* 3668 * If the new destination is SITE_LOCAL then 3669 * we must have site scope in common. 3670 */ 3671 stcb->asoc.site_scope = 1; 3672 } 3673 } else { 3674 /* Validate the address is in scope */ 3675 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3676 (stcb->asoc.loopback_scope == 0)) { 3677 addr_inscope = 0; 3678 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3679 (stcb->asoc.local_scope == 0)) { 3680 addr_inscope = 0; 3681 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3682 (stcb->asoc.site_scope == 0)) { 3683 addr_inscope = 0; 3684 } 3685 } 3686 #endif 3687 } else { 3688 /* not supported family type */ 3689 return (-1); 3690 } 3691 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3692 if (net == NULL) { 3693 return (-1); 3694 } 3695 SCTP_INCR_RADDR_COUNT(); 3696 bzero(net, sizeof(*net)); 3697 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3698 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3699 if (newaddr->sa_family == AF_INET) { 3700 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3701 } else if (newaddr->sa_family == AF_INET6) { 3702 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3703 } 3704 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3705 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3706 stcb->asoc.loopback_scope = 1; 3707 stcb->asoc.ipv4_local_scope = 1; 3708 stcb->asoc.local_scope = 0; 3709 stcb->asoc.site_scope = 1; 3710 addr_inscope = 1; 3711 } 3712 net->failure_threshold = stcb->asoc.def_net_failure; 3713 if (addr_inscope == 0) { 3714 net->dest_state = (SCTP_ADDR_REACHABLE | 3715 SCTP_ADDR_OUT_OF_SCOPE); 3716 } else { 3717 if (from == SCTP_ADDR_IS_CONFIRMED) 3718 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3719 net->dest_state = SCTP_ADDR_REACHABLE; 3720 else 3721 net->dest_state = SCTP_ADDR_REACHABLE | 3722 SCTP_ADDR_UNCONFIRMED; 3723 } 3724 /* 3725 * We set this to 0, the timer code knows that this means its an 3726 * initial value 3727 */ 3728 net->RTO = 0; 3729 net->RTO_measured = 0; 3730 stcb->asoc.numnets++; 3731 *(&net->ref_count) = 1; 3732 net->tos_flowlabel = 0; 3733 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 3734 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 3735 } else { 3736 net->port = 0; 3737 } 3738 #ifdef INET 3739 if (newaddr->sa_family == AF_INET) 3740 net->tos_flowlabel = stcb->asoc.default_tos; 3741 #endif 3742 #ifdef INET6 3743 if (newaddr->sa_family == AF_INET6) 3744 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3745 #endif 3746 /* Init the timer structure */ 3747 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3748 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3749 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3750 3751 /* Now generate a route for this guy */ 3752 #ifdef INET6 3753 /* KAME hack: embed scopeid */ 3754 if (newaddr->sa_family == AF_INET6) { 3755 struct sockaddr_in6 *sin6; 3756 3757 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3758 (void)sa6_embedscope(sin6, MODULE_GLOBAL(MOD_INET6, ip6_use_defzone)); 3759 sin6->sin6_scope_id = 0; 3760 } 3761 #endif 3762 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3763 3764 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3765 /* Get source address */ 3766 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3767 stcb, 3768 (sctp_route_t *) & net->ro, 3769 net, 3770 0, 3771 stcb->asoc.vrf_id); 3772 /* Now get the interface MTU */ 3773 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3774 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3775 } else { 3776 net->mtu = 0; 3777 } 3778 #ifdef SCTP_PRINT_FOR_B_AND_M 3779 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu); 3780 #endif 3781 if (net->mtu == 0) { 3782 /* Huh ?? */ 3783 net->mtu = SCTP_DEFAULT_MTU; 3784 } else { 3785 uint32_t rmtu; 3786 3787 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3788 #ifdef SCTP_PRINT_FOR_B_AND_M 3789 SCTP_PRINTF("The route mtu is %d\n", rmtu); 3790 #endif 3791 if (rmtu == 0) { 3792 /* 3793 * Start things off to match mtu of 3794 * interface please. 3795 */ 3796 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3797 net->ro.ro_rt, net->mtu); 3798 } else { 3799 /* 3800 * we take the route mtu over the interface, 3801 * since the route may be leading out the 3802 * loopback, or a different interface. 3803 */ 3804 net->mtu = rmtu; 3805 } 3806 } 3807 if (from == SCTP_ALLOC_ASOC) { 3808 #ifdef SCTP_PRINT_FOR_B_AND_M 3809 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu); 3810 #endif 3811 stcb->asoc.smallest_mtu = net->mtu; 3812 } 3813 } else { 3814 net->mtu = stcb->asoc.smallest_mtu; 3815 } 3816 #ifdef INET6 3817 if (newaddr->sa_family == AF_INET6) { 3818 struct sockaddr_in6 *sin6; 3819 3820 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3821 (void)sa6_recoverscope(sin6); 3822 } 3823 #endif 3824 if (net->port) { 3825 net->mtu -= sizeof(struct udphdr); 3826 } 3827 if (stcb->asoc.smallest_mtu > net->mtu) { 3828 #ifdef SCTP_PRINT_FOR_B_AND_M 3829 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n", 3830 net->mtu, stcb->asoc.smallest_mtu); 3831 #endif 3832 stcb->asoc.smallest_mtu = net->mtu; 3833 } 3834 /* JRS - Use the congestion control given in the CC module */ 3835 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 3836 3837 /* 3838 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3839 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3840 */ 3841 net->find_pseudo_cumack = 1; 3842 net->find_rtx_pseudo_cumack = 1; 3843 net->src_addr_selected = 0; 3844 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3845 if (net->ro.ro_rt == NULL) { 3846 /* Since we have no route put it at the back */ 3847 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3848 } else if (netfirst == NULL) { 3849 /* We are the first one in the pool. */ 3850 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3851 } else if (netfirst->ro.ro_rt == NULL) { 3852 /* 3853 * First one has NO route. Place this one ahead of the first 3854 * one. 3855 */ 3856 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3857 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3858 /* 3859 * This one has a different interface than the one at the 3860 * top of the list. Place it ahead. 3861 */ 3862 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3863 } else { 3864 /* 3865 * Ok we have the same interface as the first one. Move 3866 * forward until we find either a) one with a NULL route... 3867 * insert ahead of that b) one with a different ifp.. insert 3868 * after that. c) end of the list.. insert at the tail. 3869 */ 3870 struct sctp_nets *netlook; 3871 3872 do { 3873 netlook = TAILQ_NEXT(netfirst, sctp_next); 3874 if (netlook == NULL) { 3875 /* End of the list */ 3876 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3877 break; 3878 } else if (netlook->ro.ro_rt == NULL) { 3879 /* next one has NO route */ 3880 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 3881 break; 3882 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 3883 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 3884 net, sctp_next); 3885 break; 3886 } 3887 /* Shift forward */ 3888 netfirst = netlook; 3889 } while (netlook != NULL); 3890 } 3891 3892 /* got to have a primary set */ 3893 if (stcb->asoc.primary_destination == 0) { 3894 stcb->asoc.primary_destination = net; 3895 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 3896 (net->ro.ro_rt) && 3897 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 3898 /* No route to current primary adopt new primary */ 3899 stcb->asoc.primary_destination = net; 3900 } 3901 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 3902 net); 3903 /* Validate primary is first */ 3904 net = TAILQ_FIRST(&stcb->asoc.nets); 3905 if ((net != stcb->asoc.primary_destination) && 3906 (stcb->asoc.primary_destination)) { 3907 /* 3908 * first one on the list is NOT the primary sctp_cmpaddr() 3909 * is much more efficent if the primary is the first on the 3910 * list, make it so. 3911 */ 3912 TAILQ_REMOVE(&stcb->asoc.nets, 3913 stcb->asoc.primary_destination, sctp_next); 3914 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 3915 stcb->asoc.primary_destination, sctp_next); 3916 } 3917 return (0); 3918 } 3919 3920 3921 static uint32_t 3922 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 3923 { 3924 uint32_t id; 3925 struct sctpasochead *head; 3926 struct sctp_tcb *lstcb; 3927 3928 try_again: 3929 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3930 /* TSNH */ 3931 return (0); 3932 } 3933 SCTP_INP_WLOCK(inp); 3934 id = inp->sctp_associd_counter; 3935 inp->sctp_associd_counter++; 3936 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 3937 if (lstcb) { 3938 goto try_again; 3939 } 3940 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 3941 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 3942 stcb->asoc.in_asocid_hash = 1; 3943 SCTP_INP_WUNLOCK(inp); 3944 return id; 3945 } 3946 3947 /* 3948 * allocate an association and add it to the endpoint. The caller must be 3949 * careful to add all additional addresses once they are know right away or 3950 * else the assoc will be may experience a blackout scenario. 3951 */ 3952 struct sctp_tcb * 3953 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 3954 int for_a_init, int *error, uint32_t override_tag, uint32_t vrf_id, 3955 struct thread *p 3956 ) 3957 { 3958 /* note the p argument is only valid in unbound sockets */ 3959 3960 struct sctp_tcb *stcb; 3961 struct sctp_association *asoc; 3962 struct sctpasochead *head; 3963 uint16_t rport; 3964 int err; 3965 3966 /* 3967 * Assumption made here: Caller has done a 3968 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 3969 * address does not exist already. 3970 */ 3971 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 3972 /* Hit max assoc, sorry no more */ 3973 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 3974 *error = ENOBUFS; 3975 return (NULL); 3976 } 3977 if (firstaddr == NULL) { 3978 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3979 *error = EINVAL; 3980 return (NULL); 3981 } 3982 SCTP_INP_RLOCK(inp); 3983 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 3984 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 3985 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 3986 /* 3987 * If its in the TCP pool, its NOT allowed to create an 3988 * association. The parent listener needs to call 3989 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 3990 * off, or connected one does this.. its an error. 3991 */ 3992 SCTP_INP_RUNLOCK(inp); 3993 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3994 *error = EINVAL; 3995 return (NULL); 3996 } 3997 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 3998 #ifdef SCTP_DEBUG 3999 if (firstaddr) { 4000 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4001 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4002 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4003 } else { 4004 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4005 } 4006 #endif /* SCTP_DEBUG */ 4007 if (firstaddr->sa_family == AF_INET) { 4008 struct sockaddr_in *sin; 4009 4010 sin = (struct sockaddr_in *)firstaddr; 4011 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 4012 /* Invalid address */ 4013 SCTP_INP_RUNLOCK(inp); 4014 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4015 *error = EINVAL; 4016 return (NULL); 4017 } 4018 rport = sin->sin_port; 4019 } else if (firstaddr->sa_family == AF_INET6) { 4020 struct sockaddr_in6 *sin6; 4021 4022 sin6 = (struct sockaddr_in6 *)firstaddr; 4023 if ((sin6->sin6_port == 0) || 4024 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 4025 /* Invalid address */ 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 rport = sin6->sin6_port; 4032 } else { 4033 /* not supported family type */ 4034 SCTP_INP_RUNLOCK(inp); 4035 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4036 *error = EINVAL; 4037 return (NULL); 4038 } 4039 SCTP_INP_RUNLOCK(inp); 4040 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4041 /* 4042 * If you have not performed a bind, then we need to do the 4043 * ephemerial bind for you. 4044 */ 4045 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4046 (struct sockaddr *)NULL, 4047 (struct sctp_ifa *)NULL, 4048 p 4049 ))) { 4050 /* bind error, probably perm */ 4051 *error = err; 4052 return (NULL); 4053 } 4054 } 4055 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4056 if (stcb == NULL) { 4057 /* out of memory? */ 4058 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4059 *error = ENOMEM; 4060 return (NULL); 4061 } 4062 SCTP_INCR_ASOC_COUNT(); 4063 4064 bzero(stcb, sizeof(*stcb)); 4065 asoc = &stcb->asoc; 4066 4067 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4068 SCTP_TCB_LOCK_INIT(stcb); 4069 SCTP_TCB_SEND_LOCK_INIT(stcb); 4070 stcb->rport = rport; 4071 /* setup back pointer's */ 4072 stcb->sctp_ep = inp; 4073 stcb->sctp_socket = inp->sctp_socket; 4074 if ((err = sctp_init_asoc(inp, stcb, for_a_init, override_tag, vrf_id))) { 4075 /* failed */ 4076 SCTP_TCB_LOCK_DESTROY(stcb); 4077 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4078 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4079 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4080 SCTP_DECR_ASOC_COUNT(); 4081 *error = err; 4082 return (NULL); 4083 } 4084 /* and the port */ 4085 SCTP_INP_INFO_WLOCK(); 4086 SCTP_INP_WLOCK(inp); 4087 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4088 /* inpcb freed while alloc going on */ 4089 SCTP_TCB_LOCK_DESTROY(stcb); 4090 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4091 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4092 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4093 SCTP_INP_WUNLOCK(inp); 4094 SCTP_INP_INFO_WUNLOCK(); 4095 SCTP_DECR_ASOC_COUNT(); 4096 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4097 *error = EINVAL; 4098 return (NULL); 4099 } 4100 SCTP_TCB_LOCK(stcb); 4101 4102 /* now that my_vtag is set, add it to the hash */ 4103 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4104 /* put it in the bucket in the vtag hash of assoc's for the system */ 4105 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4106 #ifdef MICHAELS_EXPERIMENT 4107 sctp_delete_from_timewait(stcb->asoc.my_vtag, inp->sctp_lport, stcb->rport); 4108 #endif 4109 SCTP_INP_INFO_WUNLOCK(); 4110 4111 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4112 /* failure.. memory error? */ 4113 if (asoc->strmout) { 4114 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4115 asoc->strmout = NULL; 4116 } 4117 if (asoc->mapping_array) { 4118 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4119 asoc->mapping_array = NULL; 4120 } 4121 SCTP_DECR_ASOC_COUNT(); 4122 SCTP_TCB_LOCK_DESTROY(stcb); 4123 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4124 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4125 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4126 SCTP_INP_WUNLOCK(inp); 4127 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4128 *error = ENOBUFS; 4129 return (NULL); 4130 } 4131 /* Init all the timers */ 4132 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 4133 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4134 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4135 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4136 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4137 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4138 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4139 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4140 4141 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4142 /* now file the port under the hash as well */ 4143 if (inp->sctp_tcbhash != NULL) { 4144 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4145 inp->sctp_hashmark)]; 4146 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4147 } 4148 SCTP_INP_WUNLOCK(inp); 4149 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4150 return (stcb); 4151 } 4152 4153 4154 void 4155 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4156 { 4157 struct sctp_association *asoc; 4158 4159 asoc = &stcb->asoc; 4160 asoc->numnets--; 4161 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4162 if (net == asoc->primary_destination) { 4163 /* Reset primary */ 4164 struct sctp_nets *lnet; 4165 4166 lnet = TAILQ_FIRST(&asoc->nets); 4167 /* 4168 * Mobility adaptation Ideally, if deleted destination is 4169 * the primary, it becomes a fast retransmission trigger by 4170 * the subsequent SET PRIMARY. (by micchie) 4171 */ 4172 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4173 SCTP_MOBILITY_BASE) || 4174 sctp_is_mobility_feature_on(stcb->sctp_ep, 4175 SCTP_MOBILITY_FASTHANDOFF)) { 4176 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4177 if (asoc->deleted_primary != NULL) { 4178 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4179 goto out; 4180 } 4181 asoc->deleted_primary = net; 4182 atomic_add_int(&net->ref_count, 1); 4183 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4184 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4185 sctp_mobility_feature_on(stcb->sctp_ep, 4186 SCTP_MOBILITY_PRIM_DELETED); 4187 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4188 stcb->sctp_ep, stcb, NULL); 4189 } 4190 out: 4191 /* Try to find a confirmed primary */ 4192 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4193 } 4194 if (net == asoc->last_data_chunk_from) { 4195 /* Reset primary */ 4196 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4197 } 4198 if (net == asoc->last_control_chunk_from) { 4199 /* Clear net */ 4200 asoc->last_control_chunk_from = NULL; 4201 } 4202 sctp_free_remote_addr(net); 4203 } 4204 4205 /* 4206 * remove a remote endpoint address from an association, it will fail if the 4207 * address does not exist. 4208 */ 4209 int 4210 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4211 { 4212 /* 4213 * Here we need to remove a remote address. This is quite simple, we 4214 * first find it in the list of address for the association 4215 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4216 * on that item. Note we do not allow it to be removed if there are 4217 * no other addresses. 4218 */ 4219 struct sctp_association *asoc; 4220 struct sctp_nets *net, *net_tmp; 4221 4222 asoc = &stcb->asoc; 4223 4224 /* locate the address */ 4225 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { 4226 net_tmp = TAILQ_NEXT(net, sctp_next); 4227 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4228 continue; 4229 } 4230 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4231 remaddr)) { 4232 /* we found the guy */ 4233 if (asoc->numnets < 2) { 4234 /* Must have at LEAST two remote addresses */ 4235 return (-1); 4236 } else { 4237 sctp_remove_net(stcb, net); 4238 return (0); 4239 } 4240 } 4241 } 4242 /* not found. */ 4243 return (-2); 4244 } 4245 4246 void 4247 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4248 { 4249 struct sctpvtaghead *chain; 4250 struct sctp_tagblock *twait_block; 4251 int found = 0; 4252 int i; 4253 4254 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4255 if (!SCTP_LIST_EMPTY(chain)) { 4256 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4257 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4258 if ((twait_block->vtag_block[i].v_tag == tag) && 4259 (twait_block->vtag_block[i].lport == lport) && 4260 (twait_block->vtag_block[i].rport == rport)) { 4261 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4262 twait_block->vtag_block[i].v_tag = 0; 4263 twait_block->vtag_block[i].lport = 0; 4264 twait_block->vtag_block[i].rport = 0; 4265 found = 1; 4266 break; 4267 } 4268 } 4269 if (found) 4270 break; 4271 } 4272 } 4273 } 4274 4275 int 4276 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4277 { 4278 struct sctpvtaghead *chain; 4279 struct sctp_tagblock *twait_block; 4280 int found = 0; 4281 int i; 4282 4283 SCTP_INP_INFO_WLOCK(); 4284 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4285 if (!SCTP_LIST_EMPTY(chain)) { 4286 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4287 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4288 if ((twait_block->vtag_block[i].v_tag == tag) && 4289 (twait_block->vtag_block[i].lport == lport) && 4290 (twait_block->vtag_block[i].rport == rport)) { 4291 found = 1; 4292 break; 4293 } 4294 } 4295 if (found) 4296 break; 4297 } 4298 } 4299 SCTP_INP_INFO_WUNLOCK(); 4300 return (found); 4301 } 4302 4303 4304 void 4305 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4306 { 4307 struct sctpvtaghead *chain; 4308 struct sctp_tagblock *twait_block; 4309 struct timeval now; 4310 int set, i; 4311 4312 (void)SCTP_GETTIME_TIMEVAL(&now); 4313 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4314 set = 0; 4315 if (!SCTP_LIST_EMPTY(chain)) { 4316 /* Block(s) present, lets find space, and expire on the fly */ 4317 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4318 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4319 if ((twait_block->vtag_block[i].v_tag == 0) && 4320 !set) { 4321 twait_block->vtag_block[i].tv_sec_at_expire = 4322 now.tv_sec + time; 4323 twait_block->vtag_block[i].v_tag = tag; 4324 twait_block->vtag_block[i].lport = lport; 4325 twait_block->vtag_block[i].rport = rport; 4326 set = 1; 4327 } else if ((twait_block->vtag_block[i].v_tag) && 4328 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4329 /* Audit expires this guy */ 4330 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4331 twait_block->vtag_block[i].v_tag = 0; 4332 twait_block->vtag_block[i].lport = 0; 4333 twait_block->vtag_block[i].rport = 0; 4334 if (set == 0) { 4335 /* Reuse it for my new tag */ 4336 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4337 twait_block->vtag_block[i].v_tag = tag; 4338 twait_block->vtag_block[i].lport = lport; 4339 twait_block->vtag_block[i].rport = rport; 4340 set = 1; 4341 } 4342 } 4343 } 4344 if (set) { 4345 /* 4346 * We only do up to the block where we can 4347 * place our tag for audits 4348 */ 4349 break; 4350 } 4351 } 4352 } 4353 /* Need to add a new block to chain */ 4354 if (!set) { 4355 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4356 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4357 if (twait_block == NULL) { 4358 #ifdef INVARIANTS 4359 panic("Can not alloc tagblock"); 4360 #endif 4361 return; 4362 } 4363 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4364 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4365 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4366 twait_block->vtag_block[0].v_tag = tag; 4367 twait_block->vtag_block[0].lport = lport; 4368 twait_block->vtag_block[0].rport = rport; 4369 } 4370 } 4371 4372 4373 static void 4374 sctp_iterator_asoc_being_freed(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4375 { 4376 struct sctp_iterator *it; 4377 4378 /* 4379 * Unlock the tcb lock we do this so we avoid a dead lock scenario 4380 * where the iterator is waiting on the TCB lock and the TCB lock is 4381 * waiting on the iterator lock. 4382 */ 4383 it = stcb->asoc.stcb_starting_point_for_iterator; 4384 if (it == NULL) { 4385 return; 4386 } 4387 if (it->inp != stcb->sctp_ep) { 4388 /* hmm, focused on the wrong one? */ 4389 return; 4390 } 4391 if (it->stcb != stcb) { 4392 return; 4393 } 4394 it->stcb = LIST_NEXT(stcb, sctp_tcblist); 4395 if (it->stcb == NULL) { 4396 /* done with all asoc's in this assoc */ 4397 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 4398 it->inp = NULL; 4399 } else { 4400 it->inp = LIST_NEXT(inp, sctp_list); 4401 } 4402 } 4403 } 4404 4405 4406 /*- 4407 * Free the association after un-hashing the remote port. This 4408 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4409 * expect that the input to this function IS a locked TCB. 4410 * It will return 0, if it did NOT destroy the association (instead 4411 * it unlocks it. It will return NON-zero if it either destroyed the 4412 * association OR the association is already destroyed. 4413 */ 4414 int 4415 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4416 { 4417 int i; 4418 struct sctp_association *asoc; 4419 struct sctp_nets *net, *prev; 4420 struct sctp_laddr *laddr; 4421 struct sctp_tmit_chunk *chk; 4422 struct sctp_asconf_addr *aparam; 4423 struct sctp_asconf_ack *aack; 4424 struct sctp_stream_reset_list *liste; 4425 struct sctp_queued_to_read *sq; 4426 struct sctp_stream_queue_pending *sp; 4427 sctp_sharedkey_t *shared_key; 4428 struct socket *so; 4429 int ccnt = 0; 4430 int cnt = 0; 4431 4432 /* first, lets purge the entry from the hash table. */ 4433 4434 #ifdef SCTP_LOG_CLOSING 4435 sctp_log_closing(inp, stcb, 6); 4436 #endif 4437 if (stcb->asoc.state == 0) { 4438 #ifdef SCTP_LOG_CLOSING 4439 sctp_log_closing(inp, NULL, 7); 4440 #endif 4441 /* there is no asoc, really TSNH :-0 */ 4442 return (1); 4443 } 4444 /* TEMP CODE */ 4445 if (stcb->freed_from_where == 0) { 4446 /* Only record the first place free happened from */ 4447 stcb->freed_from_where = from_location; 4448 } 4449 /* TEMP CODE */ 4450 4451 asoc = &stcb->asoc; 4452 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4453 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4454 /* nothing around */ 4455 so = NULL; 4456 else 4457 so = inp->sctp_socket; 4458 4459 /* 4460 * We used timer based freeing if a reader or writer is in the way. 4461 * So we first check if we are actually being called from a timer, 4462 * if so we abort early if a reader or writer is still in the way. 4463 */ 4464 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4465 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4466 /* 4467 * is it the timer driving us? if so are the reader/writers 4468 * gone? 4469 */ 4470 if (stcb->asoc.refcnt) { 4471 /* nope, reader or writer in the way */ 4472 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4473 /* no asoc destroyed */ 4474 SCTP_TCB_UNLOCK(stcb); 4475 #ifdef SCTP_LOG_CLOSING 4476 sctp_log_closing(inp, stcb, 8); 4477 #endif 4478 return (0); 4479 } 4480 } 4481 /* now clean up any other timers */ 4482 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4483 asoc->hb_timer.self = NULL; 4484 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4485 asoc->dack_timer.self = NULL; 4486 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4487 /*- 4488 * For stream reset we don't blast this unless 4489 * it is a str-reset timer, it might be the 4490 * free-asoc timer which we DON'T want to 4491 * disturb. 4492 */ 4493 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4494 asoc->strreset_timer.self = NULL; 4495 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4496 asoc->asconf_timer.self = NULL; 4497 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4498 asoc->autoclose_timer.self = NULL; 4499 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4500 asoc->shut_guard_timer.self = NULL; 4501 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4502 asoc->delayed_event_timer.self = NULL; 4503 /* Mobility adaptation */ 4504 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4505 asoc->delete_prim_timer.self = NULL; 4506 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4507 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4508 net->fr_timer.self = NULL; 4509 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4510 net->rxt_timer.self = NULL; 4511 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4512 net->pmtu_timer.self = NULL; 4513 } 4514 /* Now the read queue needs to be cleaned up (only once) */ 4515 cnt = 0; 4516 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4517 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4518 SCTP_INP_READ_LOCK(inp); 4519 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4520 if (sq->stcb == stcb) { 4521 sq->do_not_ref_stcb = 1; 4522 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4523 /* 4524 * If there is no end, there never will be 4525 * now. 4526 */ 4527 if (sq->end_added == 0) { 4528 /* Held for PD-API clear that. */ 4529 sq->pdapi_aborted = 1; 4530 sq->held_length = 0; 4531 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4532 /* 4533 * Need to add a PD-API 4534 * aborted indication. 4535 * Setting the control_pdapi 4536 * assures that it will be 4537 * added right after this 4538 * msg. 4539 */ 4540 uint32_t strseq; 4541 4542 stcb->asoc.control_pdapi = sq; 4543 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4544 sctp_notify_partial_delivery_indication(stcb, 4545 SCTP_PARTIAL_DELIVERY_ABORTED, 1, strseq); 4546 stcb->asoc.control_pdapi = NULL; 4547 } 4548 } 4549 /* Add an end to wake them */ 4550 sq->end_added = 1; 4551 cnt++; 4552 } 4553 } 4554 SCTP_INP_READ_UNLOCK(inp); 4555 if (stcb->block_entry) { 4556 cnt++; 4557 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4558 stcb->block_entry->error = ECONNRESET; 4559 stcb->block_entry = NULL; 4560 } 4561 } 4562 if (stcb->asoc.refcnt) { 4563 /* 4564 * reader or writer in the way, we have hopefully given him 4565 * something to chew on above. 4566 */ 4567 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4568 SCTP_TCB_UNLOCK(stcb); 4569 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4570 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4571 /* nothing around */ 4572 so = NULL; 4573 if (so) { 4574 /* Wake any reader/writers */ 4575 sctp_sorwakeup(inp, so); 4576 sctp_sowwakeup(inp, so); 4577 } 4578 #ifdef SCTP_LOG_CLOSING 4579 sctp_log_closing(inp, stcb, 9); 4580 #endif 4581 /* no asoc destroyed */ 4582 return (0); 4583 } 4584 #ifdef SCTP_LOG_CLOSING 4585 sctp_log_closing(inp, stcb, 10); 4586 #endif 4587 /* 4588 * When I reach here, no others want to kill the assoc yet.. and I 4589 * own the lock. Now its possible an abort comes in when I do the 4590 * lock exchange below to grab all the locks to do the final take 4591 * out. to prevent this we increment the count, which will start a 4592 * timer and blow out above thus assuring us that we hold exclusive 4593 * killing of the asoc. Note that after getting back the TCB lock we 4594 * will go ahead and increment the counter back up and stop any 4595 * timer a passing stranger may have started :-S 4596 */ 4597 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4598 atomic_add_int(&stcb->asoc.refcnt, 1); 4599 4600 SCTP_TCB_UNLOCK(stcb); 4601 4602 SCTP_ITERATOR_LOCK(); 4603 SCTP_INP_INFO_WLOCK(); 4604 SCTP_INP_WLOCK(inp); 4605 SCTP_TCB_LOCK(stcb); 4606 } 4607 /* Double check the GONE flag */ 4608 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4609 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4610 /* nothing around */ 4611 so = NULL; 4612 4613 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4614 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4615 /* 4616 * For TCP type we need special handling when we are 4617 * connected. We also include the peel'ed off ones to. 4618 */ 4619 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4620 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4621 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4622 if (so) { 4623 SOCK_LOCK(so); 4624 if (so->so_rcv.sb_cc == 0) { 4625 so->so_state &= ~(SS_ISCONNECTING | 4626 SS_ISDISCONNECTING | 4627 SS_ISCONFIRMING | 4628 SS_ISCONNECTED); 4629 } 4630 SOCK_UNLOCK(so); 4631 socantrcvmore(so); 4632 sctp_sowwakeup(inp, so); 4633 sctp_sorwakeup(inp, so); 4634 SCTP_SOWAKEUP(so); 4635 } 4636 } 4637 } 4638 /* 4639 * Make it invalid too, that way if its about to run it will abort 4640 * and return. 4641 */ 4642 sctp_iterator_asoc_being_freed(inp, stcb); 4643 /* re-increment the lock */ 4644 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4645 atomic_add_int(&stcb->asoc.refcnt, -1); 4646 } 4647 asoc->state = 0; 4648 if (inp->sctp_tcbhash) { 4649 LIST_REMOVE(stcb, sctp_tcbhash); 4650 } 4651 if (stcb->asoc.in_asocid_hash) { 4652 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4653 } 4654 /* Now lets remove it from the list of ALL associations in the EP */ 4655 LIST_REMOVE(stcb, sctp_tcblist); 4656 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4657 SCTP_INP_INCR_REF(inp); 4658 SCTP_INP_WUNLOCK(inp); 4659 SCTP_ITERATOR_UNLOCK(); 4660 } 4661 /* pull from vtag hash */ 4662 LIST_REMOVE(stcb, sctp_asocs); 4663 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_TIME_WAIT, inp->sctp_lport, stcb->rport); 4664 4665 /* 4666 * Now restop the timers to be sure - this is paranoia at is finest! 4667 */ 4668 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4669 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4670 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4671 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4672 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4673 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4674 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4675 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4676 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4677 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4678 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4679 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4680 } 4681 4682 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4683 prev = NULL; 4684 /* 4685 * The chunk lists and such SHOULD be empty but we check them just 4686 * in case. 4687 */ 4688 /* anything on the wheel needs to be removed */ 4689 for (i = 0; i < asoc->streamoutcnt; i++) { 4690 struct sctp_stream_out *outs; 4691 4692 outs = &asoc->strmout[i]; 4693 /* now clean up any chunks here */ 4694 sp = TAILQ_FIRST(&outs->outqueue); 4695 while (sp) { 4696 TAILQ_REMOVE(&outs->outqueue, sp, next); 4697 if (sp->data) { 4698 sctp_m_freem(sp->data); 4699 sp->data = NULL; 4700 sp->tail_mbuf = NULL; 4701 } 4702 sctp_free_remote_addr(sp->net); 4703 sctp_free_spbufspace(stcb, asoc, sp); 4704 if (sp->holds_key_ref) 4705 sctp_auth_key_release(stcb, sp->auth_keyid); 4706 /* Free the zone stuff */ 4707 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 4708 SCTP_DECR_STRMOQ_COUNT(); 4709 /* sa_ignore FREED_MEMORY */ 4710 sp = TAILQ_FIRST(&outs->outqueue); 4711 } 4712 } 4713 4714 /* sa_ignore FREED_MEMORY */ 4715 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { 4716 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); 4717 SCTP_FREE(liste, SCTP_M_STRESET); 4718 } 4719 4720 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 4721 while (sq) { 4722 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4723 if (sq->data) { 4724 sctp_m_freem(sq->data); 4725 sq->data = NULL; 4726 } 4727 sctp_free_remote_addr(sq->whoFrom); 4728 sq->whoFrom = NULL; 4729 sq->stcb = NULL; 4730 /* Free the ctl entry */ 4731 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4732 SCTP_DECR_READQ_COUNT(); 4733 /* sa_ignore FREED_MEMORY */ 4734 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 4735 } 4736 4737 chk = TAILQ_FIRST(&asoc->free_chunks); 4738 while (chk) { 4739 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4740 if (chk->data) { 4741 sctp_m_freem(chk->data); 4742 chk->data = NULL; 4743 } 4744 if (chk->holds_key_ref) 4745 sctp_auth_key_release(stcb, chk->auth_keyid); 4746 ccnt++; 4747 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4748 SCTP_DECR_CHK_COUNT(); 4749 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4750 asoc->free_chunk_cnt--; 4751 /* sa_ignore FREED_MEMORY */ 4752 chk = TAILQ_FIRST(&asoc->free_chunks); 4753 } 4754 /* pending send queue SHOULD be empty */ 4755 if (!TAILQ_EMPTY(&asoc->send_queue)) { 4756 chk = TAILQ_FIRST(&asoc->send_queue); 4757 while (chk) { 4758 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4759 if (chk->data) { 4760 sctp_m_freem(chk->data); 4761 chk->data = NULL; 4762 } 4763 if (chk->holds_key_ref) 4764 sctp_auth_key_release(stcb, chk->auth_keyid); 4765 ccnt++; 4766 sctp_free_remote_addr(chk->whoTo); 4767 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4768 SCTP_DECR_CHK_COUNT(); 4769 /* sa_ignore FREED_MEMORY */ 4770 chk = TAILQ_FIRST(&asoc->send_queue); 4771 } 4772 } 4773 /* 4774 if (ccnt) { 4775 printf("Freed %d from send_queue\n", ccnt); 4776 ccnt = 0; 4777 } 4778 */ 4779 /* sent queue SHOULD be empty */ 4780 if (!TAILQ_EMPTY(&asoc->sent_queue)) { 4781 chk = TAILQ_FIRST(&asoc->sent_queue); 4782 while (chk) { 4783 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4784 if (chk->data) { 4785 sctp_m_freem(chk->data); 4786 chk->data = NULL; 4787 } 4788 if (chk->holds_key_ref) 4789 sctp_auth_key_release(stcb, chk->auth_keyid); 4790 ccnt++; 4791 sctp_free_remote_addr(chk->whoTo); 4792 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4793 SCTP_DECR_CHK_COUNT(); 4794 /* sa_ignore FREED_MEMORY */ 4795 chk = TAILQ_FIRST(&asoc->sent_queue); 4796 } 4797 } 4798 /* 4799 if (ccnt) { 4800 printf("Freed %d from sent_queue\n", ccnt); 4801 ccnt = 0; 4802 } 4803 */ 4804 /* control queue MAY not be empty */ 4805 if (!TAILQ_EMPTY(&asoc->control_send_queue)) { 4806 chk = TAILQ_FIRST(&asoc->control_send_queue); 4807 while (chk) { 4808 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4809 if (chk->data) { 4810 sctp_m_freem(chk->data); 4811 chk->data = NULL; 4812 } 4813 if (chk->holds_key_ref) 4814 sctp_auth_key_release(stcb, chk->auth_keyid); 4815 ccnt++; 4816 sctp_free_remote_addr(chk->whoTo); 4817 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4818 SCTP_DECR_CHK_COUNT(); 4819 /* sa_ignore FREED_MEMORY */ 4820 chk = TAILQ_FIRST(&asoc->control_send_queue); 4821 } 4822 } 4823 /* 4824 if (ccnt) { 4825 printf("Freed %d from ctrl_queue\n", ccnt); 4826 ccnt = 0; 4827 } 4828 */ 4829 4830 /* ASCONF queue MAY not be empty */ 4831 if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) { 4832 chk = TAILQ_FIRST(&asoc->asconf_send_queue); 4833 while (chk) { 4834 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4835 if (chk->data) { 4836 sctp_m_freem(chk->data); 4837 chk->data = NULL; 4838 } 4839 if (chk->holds_key_ref) 4840 sctp_auth_key_release(stcb, chk->auth_keyid); 4841 ccnt++; 4842 sctp_free_remote_addr(chk->whoTo); 4843 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4844 SCTP_DECR_CHK_COUNT(); 4845 /* sa_ignore FREED_MEMORY */ 4846 chk = TAILQ_FIRST(&asoc->asconf_send_queue); 4847 } 4848 } 4849 /* 4850 if (ccnt) { 4851 printf("Freed %d from asconf_queue\n", ccnt); 4852 ccnt = 0; 4853 } 4854 */ 4855 if (!TAILQ_EMPTY(&asoc->reasmqueue)) { 4856 chk = TAILQ_FIRST(&asoc->reasmqueue); 4857 while (chk) { 4858 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4859 if (chk->data) { 4860 sctp_m_freem(chk->data); 4861 chk->data = NULL; 4862 } 4863 if (chk->holds_key_ref) 4864 sctp_auth_key_release(stcb, chk->auth_keyid); 4865 sctp_free_remote_addr(chk->whoTo); 4866 ccnt++; 4867 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4868 SCTP_DECR_CHK_COUNT(); 4869 /* sa_ignore FREED_MEMORY */ 4870 chk = TAILQ_FIRST(&asoc->reasmqueue); 4871 } 4872 } 4873 /* 4874 if (ccnt) { 4875 printf("Freed %d from reasm_queue\n", ccnt); 4876 ccnt = 0; 4877 } 4878 */ 4879 if (asoc->mapping_array) { 4880 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4881 asoc->mapping_array = NULL; 4882 } 4883 /* the stream outs */ 4884 if (asoc->strmout) { 4885 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4886 asoc->strmout = NULL; 4887 } 4888 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 4889 if (asoc->strmin) { 4890 struct sctp_queued_to_read *ctl; 4891 4892 for (i = 0; i < asoc->streamincnt; i++) { 4893 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { 4894 /* We have somethings on the streamin queue */ 4895 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4896 while (ctl) { 4897 TAILQ_REMOVE(&asoc->strmin[i].inqueue, 4898 ctl, next); 4899 sctp_free_remote_addr(ctl->whoFrom); 4900 if (ctl->data) { 4901 sctp_m_freem(ctl->data); 4902 ctl->data = NULL; 4903 } 4904 /* 4905 * We don't free the address here 4906 * since all the net's were freed 4907 * above. 4908 */ 4909 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 4910 SCTP_DECR_READQ_COUNT(); 4911 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 4912 } 4913 } 4914 } 4915 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4916 asoc->strmin = NULL; 4917 } 4918 asoc->streamincnt = 0; 4919 while (!TAILQ_EMPTY(&asoc->nets)) { 4920 /* sa_ignore FREED_MEMORY */ 4921 net = TAILQ_FIRST(&asoc->nets); 4922 /* pull from list */ 4923 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) { 4924 #ifdef INVARIANTS 4925 panic("no net's left alloc'ed, or list points to itself"); 4926 #endif 4927 break; 4928 } 4929 prev = net; 4930 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4931 sctp_free_remote_addr(net); 4932 } 4933 4934 while (!SCTP_LIST_EMPTY(&asoc->sctp_restricted_addrs)) { 4935 /* sa_ignore FREED_MEMORY */ 4936 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); 4937 sctp_remove_laddr(laddr); 4938 } 4939 4940 /* pending asconf (address) parameters */ 4941 while (!TAILQ_EMPTY(&asoc->asconf_queue)) { 4942 /* sa_ignore FREED_MEMORY */ 4943 aparam = TAILQ_FIRST(&asoc->asconf_queue); 4944 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 4945 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 4946 } 4947 while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) { 4948 /* sa_ignore FREED_MEMORY */ 4949 aack = TAILQ_FIRST(&asoc->asconf_ack_sent); 4950 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 4951 if (aack->data != NULL) { 4952 sctp_m_freem(aack->data); 4953 } 4954 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 4955 } 4956 /* clean up auth stuff */ 4957 if (asoc->local_hmacs) 4958 sctp_free_hmaclist(asoc->local_hmacs); 4959 if (asoc->peer_hmacs) 4960 sctp_free_hmaclist(asoc->peer_hmacs); 4961 4962 if (asoc->local_auth_chunks) 4963 sctp_free_chunklist(asoc->local_auth_chunks); 4964 if (asoc->peer_auth_chunks) 4965 sctp_free_chunklist(asoc->peer_auth_chunks); 4966 4967 sctp_free_authinfo(&asoc->authinfo); 4968 4969 shared_key = LIST_FIRST(&asoc->shared_keys); 4970 while (shared_key) { 4971 LIST_REMOVE(shared_key, next); 4972 sctp_free_sharedkey(shared_key); 4973 /* sa_ignore FREED_MEMORY */ 4974 shared_key = LIST_FIRST(&asoc->shared_keys); 4975 } 4976 4977 /* Insert new items here :> */ 4978 4979 /* Get rid of LOCK */ 4980 SCTP_TCB_LOCK_DESTROY(stcb); 4981 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4982 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4983 SCTP_INP_INFO_WUNLOCK(); 4984 SCTP_INP_RLOCK(inp); 4985 } 4986 #ifdef SCTP_TRACK_FREED_ASOCS 4987 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 4988 /* now clean up the tasoc itself */ 4989 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4990 SCTP_DECR_ASOC_COUNT(); 4991 } else { 4992 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 4993 } 4994 #else 4995 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4996 SCTP_DECR_ASOC_COUNT(); 4997 #endif 4998 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4999 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5000 /* 5001 * If its NOT the inp_free calling us AND sctp_close 5002 * as been called, we call back... 5003 */ 5004 SCTP_INP_RUNLOCK(inp); 5005 /* 5006 * This will start the kill timer (if we are the 5007 * lastone) since we hold an increment yet. But this 5008 * is the only safe way to do this since otherwise 5009 * if the socket closes at the same time we are here 5010 * we might collide in the cleanup. 5011 */ 5012 sctp_inpcb_free(inp, 5013 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5014 SCTP_CALLED_DIRECTLY_NOCMPSET); 5015 SCTP_INP_DECR_REF(inp); 5016 goto out_of; 5017 } else { 5018 /* The socket is still open. */ 5019 SCTP_INP_DECR_REF(inp); 5020 } 5021 } 5022 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5023 SCTP_INP_RUNLOCK(inp); 5024 } 5025 out_of: 5026 /* destroyed the asoc */ 5027 #ifdef SCTP_LOG_CLOSING 5028 sctp_log_closing(inp, NULL, 11); 5029 #endif 5030 return (1); 5031 } 5032 5033 5034 5035 /* 5036 * determine if a destination is "reachable" based upon the addresses bound 5037 * to the current endpoint (e.g. only v4 or v6 currently bound) 5038 */ 5039 /* 5040 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5041 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5042 * types bound as its endpoint 5043 */ 5044 int 5045 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5046 { 5047 struct sctp_inpcb *inp; 5048 int answer; 5049 5050 /* 5051 * No locks here, the TCB, in all cases is already locked and an 5052 * assoc is up. There is either a INP lock by the caller applied (in 5053 * asconf case when deleting an address) or NOT in the HB case, 5054 * however if HB then the INP increment is up and the INP will not 5055 * be removed (on top of the fact that we have a TCB lock). So we 5056 * only want to read the sctp_flags, which is either bound-all or 5057 * not.. no protection needed since once an assoc is up you can't be 5058 * changing your binding. 5059 */ 5060 inp = stcb->sctp_ep; 5061 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5062 /* if bound all, destination is not restricted */ 5063 /* 5064 * RRS: Question during lock work: Is this correct? If you 5065 * are bound-all you still might need to obey the V4--V6 5066 * flags??? IMO this bound-all stuff needs to be removed! 5067 */ 5068 return (1); 5069 } 5070 /* NOTE: all "scope" checks are done when local addresses are added */ 5071 if (destaddr->sa_family == AF_INET6) { 5072 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5073 } else if (destaddr->sa_family == AF_INET) { 5074 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5075 } else { 5076 /* invalid family, so it's unreachable */ 5077 answer = 0; 5078 } 5079 return (answer); 5080 } 5081 5082 /* 5083 * update the inp_vflags on an endpoint 5084 */ 5085 static void 5086 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5087 { 5088 struct sctp_laddr *laddr; 5089 5090 /* first clear the flag */ 5091 inp->ip_inp.inp.inp_vflag = 0; 5092 /* set the flag based on addresses on the ep list */ 5093 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5094 if (laddr->ifa == NULL) { 5095 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5096 __FUNCTION__); 5097 continue; 5098 } 5099 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5100 continue; 5101 } 5102 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 5103 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5104 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 5105 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5106 } 5107 } 5108 } 5109 5110 /* 5111 * Add the address to the endpoint local address list There is nothing to be 5112 * done if we are bound to all addresses 5113 */ 5114 void 5115 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5116 { 5117 struct sctp_laddr *laddr; 5118 int fnd, error = 0; 5119 5120 fnd = 0; 5121 5122 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5123 /* You are already bound to all. You have it already */ 5124 return; 5125 } 5126 if (ifa->address.sa.sa_family == AF_INET6) { 5127 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5128 /* Can't bind a non-useable addr. */ 5129 return; 5130 } 5131 } 5132 /* first, is it already present? */ 5133 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5134 if (laddr->ifa == ifa) { 5135 fnd = 1; 5136 break; 5137 } 5138 } 5139 5140 if (fnd == 0) { 5141 /* Not in the ep list */ 5142 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5143 if (error != 0) 5144 return; 5145 inp->laddr_count++; 5146 /* update inp_vflag flags */ 5147 if (ifa->address.sa.sa_family == AF_INET6) { 5148 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5149 } else if (ifa->address.sa.sa_family == AF_INET) { 5150 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5151 } 5152 } 5153 return; 5154 } 5155 5156 5157 /* 5158 * select a new (hopefully reachable) destination net (should only be used 5159 * when we deleted an ep addr that is the only usable source address to reach 5160 * the destination net) 5161 */ 5162 static void 5163 sctp_select_primary_destination(struct sctp_tcb *stcb) 5164 { 5165 struct sctp_nets *net; 5166 5167 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5168 /* for now, we'll just pick the first reachable one we find */ 5169 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5170 continue; 5171 if (sctp_destination_is_reachable(stcb, 5172 (struct sockaddr *)&net->ro._l_addr)) { 5173 /* found a reachable destination */ 5174 stcb->asoc.primary_destination = net; 5175 } 5176 } 5177 /* I can't there from here! ...we're gonna die shortly... */ 5178 } 5179 5180 5181 /* 5182 * Delete the address from the endpoint local address list There is nothing 5183 * to be done if we are bound to all addresses 5184 */ 5185 void 5186 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5187 { 5188 struct sctp_laddr *laddr; 5189 int fnd; 5190 5191 fnd = 0; 5192 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5193 /* You are already bound to all. You have it already */ 5194 return; 5195 } 5196 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5197 if (laddr->ifa == ifa) { 5198 fnd = 1; 5199 break; 5200 } 5201 } 5202 if (fnd && (inp->laddr_count < 2)) { 5203 /* can't delete unless there are at LEAST 2 addresses */ 5204 return; 5205 } 5206 if (fnd) { 5207 /* 5208 * clean up any use of this address go through our 5209 * associations and clear any last_used_address that match 5210 * this one for each assoc, see if a new primary_destination 5211 * is needed 5212 */ 5213 struct sctp_tcb *stcb; 5214 5215 /* clean up "next_addr_touse" */ 5216 if (inp->next_addr_touse == laddr) 5217 /* delete this address */ 5218 inp->next_addr_touse = NULL; 5219 5220 /* clean up "last_used_address" */ 5221 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5222 struct sctp_nets *net; 5223 5224 SCTP_TCB_LOCK(stcb); 5225 if (stcb->asoc.last_used_address == laddr) 5226 /* delete this address */ 5227 stcb->asoc.last_used_address = NULL; 5228 /* 5229 * Now spin through all the nets and purge any ref 5230 * to laddr 5231 */ 5232 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5233 if (net->ro._s_addr && 5234 (net->ro._s_addr->ifa == laddr->ifa)) { 5235 /* Yep, purge src address selected */ 5236 sctp_rtentry_t *rt; 5237 5238 /* delete this address if cached */ 5239 rt = net->ro.ro_rt; 5240 if (rt != NULL) { 5241 RTFREE(rt); 5242 net->ro.ro_rt = NULL; 5243 } 5244 sctp_free_ifa(net->ro._s_addr); 5245 net->ro._s_addr = NULL; 5246 net->src_addr_selected = 0; 5247 } 5248 } 5249 SCTP_TCB_UNLOCK(stcb); 5250 } /* for each tcb */ 5251 /* remove it from the ep list */ 5252 sctp_remove_laddr(laddr); 5253 inp->laddr_count--; 5254 /* update inp_vflag flags */ 5255 sctp_update_ep_vflag(inp); 5256 } 5257 return; 5258 } 5259 5260 /* 5261 * Add the address to the TCB local address restricted list. 5262 * This is a "pending" address list (eg. addresses waiting for an 5263 * ASCONF-ACK response) and cannot be used as a valid source address. 5264 */ 5265 void 5266 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5267 { 5268 struct sctp_inpcb *inp; 5269 struct sctp_laddr *laddr; 5270 struct sctpladdr *list; 5271 5272 /* 5273 * Assumes TCB is locked.. and possibly the INP. May need to 5274 * confirm/fix that if we need it and is not the case. 5275 */ 5276 list = &stcb->asoc.sctp_restricted_addrs; 5277 5278 inp = stcb->sctp_ep; 5279 if (ifa->address.sa.sa_family == AF_INET6) { 5280 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5281 /* Can't bind a non-existent addr. */ 5282 return; 5283 } 5284 } 5285 /* does the address already exist? */ 5286 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5287 if (laddr->ifa == ifa) { 5288 return; 5289 } 5290 } 5291 5292 /* add to the list */ 5293 (void)sctp_insert_laddr(list, ifa, 0); 5294 return; 5295 } 5296 5297 /* 5298 * insert an laddr entry with the given ifa for the desired list 5299 */ 5300 int 5301 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5302 { 5303 struct sctp_laddr *laddr; 5304 5305 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5306 if (laddr == NULL) { 5307 /* out of memory? */ 5308 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5309 return (EINVAL); 5310 } 5311 SCTP_INCR_LADDR_COUNT(); 5312 bzero(laddr, sizeof(*laddr)); 5313 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5314 laddr->ifa = ifa; 5315 laddr->action = act; 5316 atomic_add_int(&ifa->refcount, 1); 5317 /* insert it */ 5318 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5319 5320 return (0); 5321 } 5322 5323 /* 5324 * Remove an laddr entry from the local address list (on an assoc) 5325 */ 5326 void 5327 sctp_remove_laddr(struct sctp_laddr *laddr) 5328 { 5329 5330 /* remove from the list */ 5331 LIST_REMOVE(laddr, sctp_nxt_addr); 5332 sctp_free_ifa(laddr->ifa); 5333 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5334 SCTP_DECR_LADDR_COUNT(); 5335 } 5336 5337 /* 5338 * Remove a local address from the TCB local address restricted list 5339 */ 5340 void 5341 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5342 { 5343 struct sctp_inpcb *inp; 5344 struct sctp_laddr *laddr; 5345 5346 /* 5347 * This is called by asconf work. It is assumed that a) The TCB is 5348 * locked and b) The INP is locked. This is true in as much as I can 5349 * trace through the entry asconf code where I did these locks. 5350 * Again, the ASCONF code is a bit different in that it does lock 5351 * the INP during its work often times. This must be since we don't 5352 * want other proc's looking up things while what they are looking 5353 * up is changing :-D 5354 */ 5355 5356 inp = stcb->sctp_ep; 5357 /* if subset bound and don't allow ASCONF's, can't delete last */ 5358 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5359 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5360 if (stcb->sctp_ep->laddr_count < 2) { 5361 /* can't delete last address */ 5362 return; 5363 } 5364 } 5365 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5366 /* remove the address if it exists */ 5367 if (laddr->ifa == NULL) 5368 continue; 5369 if (laddr->ifa == ifa) { 5370 sctp_remove_laddr(laddr); 5371 return; 5372 } 5373 } 5374 5375 /* address not found! */ 5376 return; 5377 } 5378 5379 /* 5380 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5381 */ 5382 /* sysctl */ 5383 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5384 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5385 5386 void 5387 sctp_pcb_init() 5388 { 5389 /* 5390 * SCTP initialization for the PCB structures should be called by 5391 * the sctp_init() funciton. 5392 */ 5393 int i; 5394 struct timeval tv; 5395 5396 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5397 /* error I was called twice */ 5398 return; 5399 } 5400 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5401 5402 #if defined(SCTP_LOCAL_TRACE_BUF) 5403 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5404 #endif 5405 (void)SCTP_GETTIME_TIMEVAL(&tv); 5406 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5407 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5408 /* init the empty list of (All) Endpoints */ 5409 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5410 5411 /* init the iterator head */ 5412 TAILQ_INIT(&SCTP_BASE_INFO(iteratorhead)); 5413 5414 /* init the hash table of endpoints */ 5415 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5416 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5417 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5418 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5419 &SCTP_BASE_INFO(hashasocmark)); 5420 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5421 &SCTP_BASE_INFO(hashmark)); 5422 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5423 &SCTP_BASE_INFO(hashtcpmark)); 5424 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5425 5426 5427 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5428 &SCTP_BASE_INFO(hashvrfmark)); 5429 5430 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5431 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5432 /* init the zones */ 5433 /* 5434 * FIX ME: Should check for NULL returns, but if it does fail we are 5435 * doomed to panic anyways... add later maybe. 5436 */ 5437 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5438 sizeof(struct sctp_inpcb), maxsockets); 5439 5440 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5441 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5442 5443 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5444 sizeof(struct sctp_laddr), 5445 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5446 5447 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5448 sizeof(struct sctp_nets), 5449 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5450 5451 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5452 sizeof(struct sctp_tmit_chunk), 5453 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5454 5455 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5456 sizeof(struct sctp_queued_to_read), 5457 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5458 5459 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5460 sizeof(struct sctp_stream_queue_pending), 5461 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5462 5463 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5464 sizeof(struct sctp_asconf), 5465 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5466 5467 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5468 sizeof(struct sctp_asconf_ack), 5469 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5470 5471 5472 /* Master Lock INIT for info structure */ 5473 SCTP_INP_INFO_LOCK_INIT(); 5474 SCTP_STATLOG_INIT_LOCK(); 5475 SCTP_ITERATOR_LOCK_INIT(); 5476 5477 SCTP_IPI_COUNT_INIT(); 5478 SCTP_IPI_ADDR_INIT(); 5479 SCTP_IPI_ITERATOR_WQ_INIT(); 5480 #ifdef SCTP_PACKET_LOGGING 5481 SCTP_IP_PKTLOG_INIT(); 5482 #endif 5483 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5484 5485 /* not sure if we need all the counts */ 5486 SCTP_BASE_INFO(ipi_count_ep) = 0; 5487 /* assoc/tcb zone info */ 5488 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5489 /* local addrlist zone info */ 5490 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5491 /* remote addrlist zone info */ 5492 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5493 /* chunk info */ 5494 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5495 5496 /* socket queue zone info */ 5497 SCTP_BASE_INFO(ipi_count_readq) = 0; 5498 5499 /* stream out queue cont */ 5500 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5501 5502 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5503 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5504 5505 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5506 5507 /* Init the TIMEWAIT list */ 5508 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5509 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait[i])); 5510 } 5511 5512 #if defined(SCTP_USE_THREAD_BASED_ITERATOR) 5513 SCTP_BASE_INFO(iterator_running) = 0; 5514 SCTP_BASE_INFO(threads_must_exit) = 0; 5515 sctp_startup_iterator(); 5516 #endif 5517 5518 /* 5519 * INIT the default VRF which for BSD is the only one, other O/S's 5520 * may have more. But initially they must start with one and then 5521 * add the VRF's as addresses are added. 5522 */ 5523 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5524 5525 } 5526 5527 /* 5528 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5529 */ 5530 void 5531 sctp_pcb_finish(void) 5532 { 5533 struct sctp_vrflist *vrf_bucket; 5534 struct sctp_vrf *vrf; 5535 struct sctp_ifn *ifn; 5536 struct sctp_ifa *ifa; 5537 struct sctpvtaghead *chain; 5538 struct sctp_tagblock *twait_block, *prev_twait_block; 5539 int i; 5540 5541 /* 5542 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5543 * destroyed first). 5544 */ 5545 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5546 vrf = LIST_FIRST(vrf_bucket); 5547 while (vrf) { 5548 ifn = LIST_FIRST(&vrf->ifnlist); 5549 while (ifn) { 5550 ifa = LIST_FIRST(&ifn->ifalist); 5551 while (ifa) { 5552 /* free the ifa */ 5553 LIST_REMOVE(ifa, next_bucket); 5554 LIST_REMOVE(ifa, next_ifa); 5555 SCTP_FREE(ifa, SCTP_M_IFA); 5556 ifa = LIST_FIRST(&ifn->ifalist); 5557 } 5558 /* free the ifn */ 5559 LIST_REMOVE(ifn, next_bucket); 5560 LIST_REMOVE(ifn, next_ifn); 5561 SCTP_FREE(ifn, SCTP_M_IFN); 5562 ifn = LIST_FIRST(&vrf->ifnlist); 5563 } 5564 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5565 /* free the vrf */ 5566 LIST_REMOVE(vrf, next_vrf); 5567 SCTP_FREE(vrf, SCTP_M_VRF); 5568 vrf = LIST_FIRST(vrf_bucket); 5569 } 5570 /* free the vrf hashes */ 5571 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5572 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5573 5574 /* 5575 * free the TIMEWAIT list elements malloc'd in the function 5576 * sctp_add_vtag_to_timewait()... 5577 */ 5578 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5579 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5580 if (!SCTP_LIST_EMPTY(chain)) { 5581 prev_twait_block = NULL; 5582 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5583 if (prev_twait_block) { 5584 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5585 } 5586 prev_twait_block = twait_block; 5587 } 5588 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5589 } 5590 } 5591 5592 /* free the locks and mutexes */ 5593 #ifdef SCTP_PACKET_LOGGING 5594 SCTP_IP_PKTLOG_DESTROY(); 5595 5596 #endif 5597 SCTP_IPI_ITERATOR_WQ_DESTROY(); 5598 SCTP_IPI_ADDR_DESTROY(); 5599 SCTP_ITERATOR_LOCK_DESTROY(); 5600 SCTP_STATLOG_DESTROY(); 5601 SCTP_INP_INFO_LOCK_DESTROY(); 5602 5603 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5604 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5605 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5606 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5607 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5608 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5609 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5610 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5611 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5612 /* Get rid of other stuff to */ 5613 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5614 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5615 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5616 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5617 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5618 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5619 5620 } 5621 5622 5623 int 5624 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5625 int iphlen, int offset, int limit, struct sctphdr *sh, 5626 struct sockaddr *altsa) 5627 { 5628 /* 5629 * grub through the INIT pulling addresses and loading them to the 5630 * nets structure in the asoc. The from address in the mbuf should 5631 * also be loaded (if it is not already). This routine can be called 5632 * with either INIT or INIT-ACK's as long as the m points to the IP 5633 * packet and the offset points to the beginning of the parameters. 5634 */ 5635 struct sctp_inpcb *inp, *l_inp; 5636 struct sctp_nets *net, *net_tmp; 5637 struct ip *iph; 5638 struct sctp_paramhdr *phdr, parm_buf; 5639 struct sctp_tcb *stcb_tmp; 5640 uint16_t ptype, plen; 5641 struct sockaddr *sa; 5642 struct sockaddr_storage dest_store; 5643 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 5644 struct sockaddr_in sin; 5645 struct sockaddr_in6 sin6; 5646 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5647 struct sctp_auth_random *p_random = NULL; 5648 uint16_t random_len = 0; 5649 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5650 struct sctp_auth_hmac_algo *hmacs = NULL; 5651 uint16_t hmacs_len = 0; 5652 uint8_t saw_asconf = 0; 5653 uint8_t saw_asconf_ack = 0; 5654 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 5655 struct sctp_auth_chunk_list *chunks = NULL; 5656 uint16_t num_chunks = 0; 5657 sctp_key_t *new_key; 5658 uint32_t keylen; 5659 int got_random = 0, got_hmacs = 0, got_chklist = 0; 5660 5661 /* First get the destination address setup too. */ 5662 memset(&sin, 0, sizeof(sin)); 5663 memset(&sin6, 0, sizeof(sin6)); 5664 5665 sin.sin_family = AF_INET; 5666 sin.sin_len = sizeof(sin); 5667 sin.sin_port = stcb->rport; 5668 5669 sin6.sin6_family = AF_INET6; 5670 sin6.sin6_len = sizeof(struct sockaddr_in6); 5671 sin6.sin6_port = stcb->rport; 5672 if (altsa == NULL) { 5673 iph = mtod(m, struct ip *); 5674 switch (iph->ip_v) { 5675 case IPVERSION: 5676 { 5677 /* its IPv4 */ 5678 struct sockaddr_in *sin_2; 5679 5680 sin_2 = (struct sockaddr_in *)(local_sa); 5681 memset(sin_2, 0, sizeof(sin)); 5682 sin_2->sin_family = AF_INET; 5683 sin_2->sin_len = sizeof(sin); 5684 sin_2->sin_port = sh->dest_port; 5685 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 5686 sin.sin_addr = iph->ip_src; 5687 sa = (struct sockaddr *)&sin; 5688 break; 5689 } 5690 #ifdef INET6 5691 case IPV6_VERSION >> 4: 5692 { 5693 /* its IPv6 */ 5694 struct ip6_hdr *ip6; 5695 struct sockaddr_in6 *sin6_2; 5696 5697 ip6 = mtod(m, struct ip6_hdr *); 5698 sin6_2 = (struct sockaddr_in6 *)(local_sa); 5699 memset(sin6_2, 0, sizeof(sin6)); 5700 sin6_2->sin6_family = AF_INET6; 5701 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 5702 sin6_2->sin6_port = sh->dest_port; 5703 sin6.sin6_addr = ip6->ip6_src; 5704 sa = (struct sockaddr *)&sin6; 5705 break; 5706 } 5707 #endif 5708 default: 5709 sa = NULL; 5710 break; 5711 } 5712 } else { 5713 /* 5714 * For cookies we use the src address NOT from the packet 5715 * but from the original INIT 5716 */ 5717 sa = altsa; 5718 } 5719 /* Turn off ECN until we get through all params */ 5720 stcb->asoc.ecn_allowed = 0; 5721 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5722 /* mark all addresses that we have currently on the list */ 5723 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 5724 } 5725 /* does the source address already exist? if so skip it */ 5726 l_inp = inp = stcb->sctp_ep; 5727 5728 atomic_add_int(&stcb->asoc.refcnt, 1); 5729 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 5730 atomic_add_int(&stcb->asoc.refcnt, -1); 5731 5732 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 5733 /* we must add the source address */ 5734 /* no scope set here since we have a tcb already. */ 5735 if ((sa->sa_family == AF_INET) && 5736 (stcb->asoc.ipv4_addr_legal)) { 5737 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 5738 return (-1); 5739 } 5740 } else if ((sa->sa_family == AF_INET6) && 5741 (stcb->asoc.ipv6_addr_legal)) { 5742 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 5743 return (-2); 5744 } 5745 } 5746 } else { 5747 if (net_tmp != NULL && stcb_tmp == stcb) { 5748 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 5749 } else if (stcb_tmp != stcb) { 5750 /* It belongs to another association? */ 5751 if (stcb_tmp) 5752 SCTP_TCB_UNLOCK(stcb_tmp); 5753 return (-3); 5754 } 5755 } 5756 if (stcb->asoc.state == 0) { 5757 /* the assoc was freed? */ 5758 return (-4); 5759 } 5760 /* 5761 * peer must explicitly turn this on. This may have been initialized 5762 * to be "on" in order to allow local addr changes while INIT's are 5763 * in flight. 5764 */ 5765 stcb->asoc.peer_supports_asconf = 0; 5766 /* now we must go through each of the params. */ 5767 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 5768 while (phdr) { 5769 ptype = ntohs(phdr->param_type); 5770 plen = ntohs(phdr->param_length); 5771 /* 5772 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 5773 * (int)plen); 5774 */ 5775 if (offset + plen > limit) { 5776 break; 5777 } 5778 if (plen == 0) { 5779 break; 5780 } 5781 if (ptype == SCTP_IPV4_ADDRESS) { 5782 if (stcb->asoc.ipv4_addr_legal) { 5783 struct sctp_ipv4addr_param *p4, p4_buf; 5784 5785 /* ok get the v4 address and check/add */ 5786 phdr = sctp_get_next_param(m, offset, 5787 (struct sctp_paramhdr *)&p4_buf, 5788 sizeof(p4_buf)); 5789 if (plen != sizeof(struct sctp_ipv4addr_param) || 5790 phdr == NULL) { 5791 return (-5); 5792 } 5793 p4 = (struct sctp_ipv4addr_param *)phdr; 5794 sin.sin_addr.s_addr = p4->addr; 5795 if (IN_MULTICAST(sin.sin_addr.s_addr)) { 5796 /* Skip multi-cast addresses */ 5797 goto next_param; 5798 } 5799 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 5800 (sin.sin_addr.s_addr == INADDR_ANY)) { 5801 goto next_param; 5802 } 5803 sa = (struct sockaddr *)&sin; 5804 inp = stcb->sctp_ep; 5805 atomic_add_int(&stcb->asoc.refcnt, 1); 5806 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5807 local_sa, stcb); 5808 atomic_add_int(&stcb->asoc.refcnt, -1); 5809 5810 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 5811 inp == NULL) { 5812 /* we must add the source address */ 5813 /* 5814 * no scope set since we have a tcb 5815 * already 5816 */ 5817 5818 /* 5819 * we must validate the state again 5820 * here 5821 */ 5822 add_it_now: 5823 if (stcb->asoc.state == 0) { 5824 /* the assoc was freed? */ 5825 return (-7); 5826 } 5827 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 5828 return (-8); 5829 } 5830 } else if (stcb_tmp == stcb) { 5831 if (stcb->asoc.state == 0) { 5832 /* the assoc was freed? */ 5833 return (-10); 5834 } 5835 if (net != NULL) { 5836 /* clear flag */ 5837 net->dest_state &= 5838 ~SCTP_ADDR_NOT_IN_ASSOC; 5839 } 5840 } else { 5841 /* 5842 * strange, address is in another 5843 * assoc? straighten out locks. 5844 */ 5845 if (stcb_tmp) { 5846 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 5847 /* 5848 * in setup state we 5849 * abort this guy 5850 */ 5851 sctp_abort_an_association(stcb_tmp->sctp_ep, 5852 stcb_tmp, 1, NULL, 0); 5853 goto add_it_now; 5854 } 5855 SCTP_TCB_UNLOCK(stcb_tmp); 5856 } 5857 if (stcb->asoc.state == 0) { 5858 /* the assoc was freed? */ 5859 return (-12); 5860 } 5861 return (-13); 5862 } 5863 } 5864 } else if (ptype == SCTP_IPV6_ADDRESS) { 5865 if (stcb->asoc.ipv6_addr_legal) { 5866 /* ok get the v6 address and check/add */ 5867 struct sctp_ipv6addr_param *p6, p6_buf; 5868 5869 phdr = sctp_get_next_param(m, offset, 5870 (struct sctp_paramhdr *)&p6_buf, 5871 sizeof(p6_buf)); 5872 if (plen != sizeof(struct sctp_ipv6addr_param) || 5873 phdr == NULL) { 5874 return (-14); 5875 } 5876 p6 = (struct sctp_ipv6addr_param *)phdr; 5877 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 5878 sizeof(p6->addr)); 5879 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 5880 /* Skip multi-cast addresses */ 5881 goto next_param; 5882 } 5883 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 5884 /* 5885 * Link local make no sense without 5886 * scope 5887 */ 5888 goto next_param; 5889 } 5890 sa = (struct sockaddr *)&sin6; 5891 inp = stcb->sctp_ep; 5892 atomic_add_int(&stcb->asoc.refcnt, 1); 5893 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5894 local_sa, stcb); 5895 atomic_add_int(&stcb->asoc.refcnt, -1); 5896 if (stcb_tmp == NULL && 5897 (inp == stcb->sctp_ep || inp == NULL)) { 5898 /* 5899 * we must validate the state again 5900 * here 5901 */ 5902 add_it_now6: 5903 if (stcb->asoc.state == 0) { 5904 /* the assoc was freed? */ 5905 return (-16); 5906 } 5907 /* 5908 * we must add the address, no scope 5909 * set 5910 */ 5911 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 5912 return (-17); 5913 } 5914 } else if (stcb_tmp == stcb) { 5915 /* 5916 * we must validate the state again 5917 * here 5918 */ 5919 if (stcb->asoc.state == 0) { 5920 /* the assoc was freed? */ 5921 return (-19); 5922 } 5923 if (net != NULL) { 5924 /* clear flag */ 5925 net->dest_state &= 5926 ~SCTP_ADDR_NOT_IN_ASSOC; 5927 } 5928 } else { 5929 /* 5930 * strange, address is in another 5931 * assoc? straighten out locks. 5932 */ 5933 if (stcb_tmp) 5934 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 5935 /* 5936 * in setup state we 5937 * abort this guy 5938 */ 5939 sctp_abort_an_association(stcb_tmp->sctp_ep, 5940 stcb_tmp, 1, NULL, 0); 5941 goto add_it_now6; 5942 } 5943 SCTP_TCB_UNLOCK(stcb_tmp); 5944 5945 if (stcb->asoc.state == 0) { 5946 /* the assoc was freed? */ 5947 return (-21); 5948 } 5949 return (-22); 5950 } 5951 } 5952 } else if (ptype == SCTP_ECN_CAPABLE) { 5953 stcb->asoc.ecn_allowed = 1; 5954 } else if (ptype == SCTP_ULP_ADAPTATION) { 5955 if (stcb->asoc.state != SCTP_STATE_OPEN) { 5956 struct sctp_adaptation_layer_indication ai, 5957 *aip; 5958 5959 phdr = sctp_get_next_param(m, offset, 5960 (struct sctp_paramhdr *)&ai, sizeof(ai)); 5961 aip = (struct sctp_adaptation_layer_indication *)phdr; 5962 if (aip) { 5963 stcb->asoc.peers_adaptation = ntohl(aip->indication); 5964 stcb->asoc.adaptation_needed = 1; 5965 } 5966 } 5967 } else if (ptype == SCTP_SET_PRIM_ADDR) { 5968 struct sctp_asconf_addr_param lstore, *fee; 5969 struct sctp_asconf_addrv4_param *fii; 5970 int lptype; 5971 struct sockaddr *lsa = NULL; 5972 5973 stcb->asoc.peer_supports_asconf = 1; 5974 if (plen > sizeof(lstore)) { 5975 return (-23); 5976 } 5977 phdr = sctp_get_next_param(m, offset, 5978 (struct sctp_paramhdr *)&lstore, 5979 min(plen, sizeof(lstore))); 5980 if (phdr == NULL) { 5981 return (-24); 5982 } 5983 fee = (struct sctp_asconf_addr_param *)phdr; 5984 lptype = ntohs(fee->addrp.ph.param_type); 5985 if (lptype == SCTP_IPV4_ADDRESS) { 5986 if (plen != 5987 sizeof(struct sctp_asconf_addrv4_param)) { 5988 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 5989 (int)sizeof(struct sctp_asconf_addrv4_param), 5990 plen); 5991 } else { 5992 fii = (struct sctp_asconf_addrv4_param *)fee; 5993 sin.sin_addr.s_addr = fii->addrp.addr; 5994 lsa = (struct sockaddr *)&sin; 5995 } 5996 } else if (lptype == SCTP_IPV6_ADDRESS) { 5997 if (plen != 5998 sizeof(struct sctp_asconf_addr_param)) { 5999 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6000 (int)sizeof(struct sctp_asconf_addr_param), 6001 plen); 6002 } else { 6003 memcpy(sin6.sin6_addr.s6_addr, 6004 fee->addrp.addr, 6005 sizeof(fee->addrp.addr)); 6006 lsa = (struct sockaddr *)&sin6; 6007 } 6008 } 6009 if (lsa) { 6010 (void)sctp_set_primary_addr(stcb, sa, NULL); 6011 } 6012 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6013 stcb->asoc.peer_supports_nat = 1; 6014 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6015 /* Peer supports pr-sctp */ 6016 stcb->asoc.peer_supports_prsctp = 1; 6017 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6018 /* A supported extension chunk */ 6019 struct sctp_supported_chunk_types_param *pr_supported; 6020 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6021 int num_ent, i; 6022 6023 phdr = sctp_get_next_param(m, offset, 6024 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6025 if (phdr == NULL) { 6026 return (-25); 6027 } 6028 stcb->asoc.peer_supports_asconf = 0; 6029 stcb->asoc.peer_supports_prsctp = 0; 6030 stcb->asoc.peer_supports_pktdrop = 0; 6031 stcb->asoc.peer_supports_strreset = 0; 6032 stcb->asoc.peer_supports_auth = 0; 6033 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6034 num_ent = plen - sizeof(struct sctp_paramhdr); 6035 for (i = 0; i < num_ent; i++) { 6036 switch (pr_supported->chunk_types[i]) { 6037 case SCTP_ASCONF: 6038 case SCTP_ASCONF_ACK: 6039 stcb->asoc.peer_supports_asconf = 1; 6040 break; 6041 case SCTP_FORWARD_CUM_TSN: 6042 stcb->asoc.peer_supports_prsctp = 1; 6043 break; 6044 case SCTP_PACKET_DROPPED: 6045 stcb->asoc.peer_supports_pktdrop = 1; 6046 break; 6047 case SCTP_STREAM_RESET: 6048 stcb->asoc.peer_supports_strreset = 1; 6049 break; 6050 case SCTP_AUTHENTICATION: 6051 stcb->asoc.peer_supports_auth = 1; 6052 break; 6053 default: 6054 /* one I have not learned yet */ 6055 break; 6056 6057 } 6058 } 6059 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 6060 /* Peer supports ECN-nonce */ 6061 stcb->asoc.peer_supports_ecn_nonce = 1; 6062 stcb->asoc.ecn_nonce_allowed = 1; 6063 } else if (ptype == SCTP_RANDOM) { 6064 if (plen > sizeof(random_store)) 6065 break; 6066 if (got_random) { 6067 /* already processed a RANDOM */ 6068 goto next_param; 6069 } 6070 phdr = sctp_get_next_param(m, offset, 6071 (struct sctp_paramhdr *)random_store, 6072 min(sizeof(random_store), plen)); 6073 if (phdr == NULL) 6074 return (-26); 6075 p_random = (struct sctp_auth_random *)phdr; 6076 random_len = plen - sizeof(*p_random); 6077 /* enforce the random length */ 6078 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6079 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6080 return (-27); 6081 } 6082 got_random = 1; 6083 } else if (ptype == SCTP_HMAC_LIST) { 6084 int num_hmacs; 6085 int i; 6086 6087 if (plen > sizeof(hmacs_store)) 6088 break; 6089 if (got_hmacs) { 6090 /* already processed a HMAC list */ 6091 goto next_param; 6092 } 6093 phdr = sctp_get_next_param(m, offset, 6094 (struct sctp_paramhdr *)hmacs_store, 6095 min(plen, sizeof(hmacs_store))); 6096 if (phdr == NULL) 6097 return (-28); 6098 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6099 hmacs_len = plen - sizeof(*hmacs); 6100 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6101 /* validate the hmac list */ 6102 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6103 return (-29); 6104 } 6105 if (stcb->asoc.peer_hmacs != NULL) 6106 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6107 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6108 if (stcb->asoc.peer_hmacs != NULL) { 6109 for (i = 0; i < num_hmacs; i++) { 6110 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6111 ntohs(hmacs->hmac_ids[i])); 6112 } 6113 } 6114 got_hmacs = 1; 6115 } else if (ptype == SCTP_CHUNK_LIST) { 6116 int i; 6117 6118 if (plen > sizeof(chunks_store)) 6119 break; 6120 if (got_chklist) { 6121 /* already processed a Chunks list */ 6122 goto next_param; 6123 } 6124 phdr = sctp_get_next_param(m, offset, 6125 (struct sctp_paramhdr *)chunks_store, 6126 min(plen, sizeof(chunks_store))); 6127 if (phdr == NULL) 6128 return (-30); 6129 chunks = (struct sctp_auth_chunk_list *)phdr; 6130 num_chunks = plen - sizeof(*chunks); 6131 if (stcb->asoc.peer_auth_chunks != NULL) 6132 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6133 else 6134 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6135 for (i = 0; i < num_chunks; i++) { 6136 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6137 stcb->asoc.peer_auth_chunks); 6138 /* record asconf/asconf-ack if listed */ 6139 if (chunks->chunk_types[i] == SCTP_ASCONF) 6140 saw_asconf = 1; 6141 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6142 saw_asconf_ack = 1; 6143 6144 } 6145 got_chklist = 1; 6146 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6147 (ptype == SCTP_STATE_COOKIE) || 6148 (ptype == SCTP_UNRECOG_PARAM) || 6149 (ptype == SCTP_COOKIE_PRESERVE) || 6150 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6151 (ptype == SCTP_ADD_IP_ADDRESS) || 6152 (ptype == SCTP_DEL_IP_ADDRESS) || 6153 (ptype == SCTP_ERROR_CAUSE_IND) || 6154 (ptype == SCTP_SUCCESS_REPORT)) { 6155 /* don't care */ ; 6156 } else { 6157 if ((ptype & 0x8000) == 0x0000) { 6158 /* 6159 * must stop processing the rest of the 6160 * param's. Any report bits were handled 6161 * with the call to 6162 * sctp_arethere_unrecognized_parameters() 6163 * when the INIT or INIT-ACK was first seen. 6164 */ 6165 break; 6166 } 6167 } 6168 6169 next_param: 6170 offset += SCTP_SIZE32(plen); 6171 if (offset >= limit) { 6172 break; 6173 } 6174 phdr = sctp_get_next_param(m, offset, &parm_buf, 6175 sizeof(parm_buf)); 6176 } 6177 /* Now check to see if we need to purge any addresses */ 6178 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { 6179 net_tmp = TAILQ_NEXT(net, sctp_next); 6180 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6181 SCTP_ADDR_NOT_IN_ASSOC) { 6182 /* This address has been removed from the asoc */ 6183 /* remove and free it */ 6184 stcb->asoc.numnets--; 6185 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6186 sctp_free_remote_addr(net); 6187 if (net == stcb->asoc.primary_destination) { 6188 stcb->asoc.primary_destination = NULL; 6189 sctp_select_primary_destination(stcb); 6190 } 6191 } 6192 } 6193 /* validate authentication required parameters */ 6194 if (got_random && got_hmacs) { 6195 stcb->asoc.peer_supports_auth = 1; 6196 } else { 6197 stcb->asoc.peer_supports_auth = 0; 6198 } 6199 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6200 /* peer does not support auth but sent a chunks list? */ 6201 return (-31); 6202 } 6203 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6204 !stcb->asoc.peer_supports_auth) { 6205 /* peer supports asconf but not auth? */ 6206 return (-32); 6207 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6208 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6209 return (-33); 6210 } 6211 /* concatenate the full random key */ 6212 #ifdef SCTP_AUTH_DRAFT_04 6213 keylen = random_len; 6214 new_key = sctp_alloc_key(keylen); 6215 if (new_key != NULL) { 6216 /* copy in the RANDOM */ 6217 if (p_random != NULL) 6218 bcopy(p_random->random_data, new_key->key, random_len); 6219 } 6220 #else 6221 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6222 if (chunks != NULL) { 6223 keylen += sizeof(*chunks) + num_chunks; 6224 } 6225 new_key = sctp_alloc_key(keylen); 6226 if (new_key != NULL) { 6227 /* copy in the RANDOM */ 6228 if (p_random != NULL) { 6229 keylen = sizeof(*p_random) + random_len; 6230 bcopy(p_random, new_key->key, keylen); 6231 } 6232 /* append in the AUTH chunks */ 6233 if (chunks != NULL) { 6234 bcopy(chunks, new_key->key + keylen, 6235 sizeof(*chunks) + num_chunks); 6236 keylen += sizeof(*chunks) + num_chunks; 6237 } 6238 /* append in the HMACs */ 6239 if (hmacs != NULL) { 6240 bcopy(hmacs, new_key->key + keylen, 6241 sizeof(*hmacs) + hmacs_len); 6242 } 6243 } 6244 #endif 6245 else { 6246 /* failed to get memory for the key */ 6247 return (-34); 6248 } 6249 if (stcb->asoc.authinfo.peer_random != NULL) 6250 sctp_free_key(stcb->asoc.authinfo.peer_random); 6251 stcb->asoc.authinfo.peer_random = new_key; 6252 #ifdef SCTP_AUTH_DRAFT_04 6253 /* don't include the chunks and hmacs for draft -04 */ 6254 stcb->asoc.authinfo.peer_random->keylen = random_len; 6255 #endif 6256 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6257 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6258 6259 return (0); 6260 } 6261 6262 int 6263 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6264 struct sctp_nets *net) 6265 { 6266 /* make sure the requested primary address exists in the assoc */ 6267 if (net == NULL && sa) 6268 net = sctp_findnet(stcb, sa); 6269 6270 if (net == NULL) { 6271 /* didn't find the requested primary address! */ 6272 return (-1); 6273 } else { 6274 /* set the primary address */ 6275 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6276 /* Must be confirmed, so queue to set */ 6277 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6278 return (0); 6279 } 6280 stcb->asoc.primary_destination = net; 6281 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 6282 net = TAILQ_FIRST(&stcb->asoc.nets); 6283 if (net != stcb->asoc.primary_destination) { 6284 /* 6285 * first one on the list is NOT the primary 6286 * sctp_cmpaddr() is much more efficent if the 6287 * primary is the first on the list, make it so. 6288 */ 6289 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6290 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6291 } 6292 return (0); 6293 } 6294 } 6295 6296 int 6297 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6298 { 6299 /* 6300 * This function serves two purposes. It will see if a TAG can be 6301 * re-used and return 1 for yes it is ok and 0 for don't use that 6302 * tag. A secondary function it will do is purge out old tags that 6303 * can be removed. 6304 */ 6305 struct sctpvtaghead *chain; 6306 struct sctp_tagblock *twait_block; 6307 struct sctpasochead *head; 6308 struct sctp_tcb *stcb; 6309 int i; 6310 6311 SCTP_INP_INFO_RLOCK(); 6312 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6313 SCTP_BASE_INFO(hashasocmark))]; 6314 if (head == NULL) { 6315 /* invalid vtag */ 6316 goto skip_vtag_check; 6317 } 6318 LIST_FOREACH(stcb, head, sctp_asocs) { 6319 /* 6320 * We choose not to lock anything here. TCB's can't be 6321 * removed since we have the read lock, so they can't be 6322 * freed on us, same thing for the INP. I may be wrong with 6323 * this assumption, but we will go with it for now :-) 6324 */ 6325 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6326 continue; 6327 } 6328 if (stcb->asoc.my_vtag == tag) { 6329 /* candidate */ 6330 if (stcb->rport != rport) { 6331 continue; 6332 } 6333 if (stcb->sctp_ep->sctp_lport != lport) { 6334 continue; 6335 } 6336 /* Its a used tag set */ 6337 SCTP_INP_INFO_WUNLOCK(); 6338 return (0); 6339 } 6340 } 6341 skip_vtag_check: 6342 6343 chain = &SCTP_BASE_INFO(vtag_timewait[(tag % SCTP_STACK_VTAG_HASH_SIZE))]; 6344 /* Now what about timed wait ? */ 6345 if (!SCTP_LIST_EMPTY(chain)) { 6346 /* 6347 * Block(s) are present, lets see if we have this tag in the 6348 * list 6349 */ 6350 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6351 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6352 if (twait_block->vtag_block[i].v_tag == 0) { 6353 /* not used */ 6354 continue; 6355 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6356 now->tv_sec) { 6357 /* Audit expires this guy */ 6358 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6359 twait_block->vtag_block[i].v_tag = 0; 6360 twait_block->vtag_block[i].lport = 0; 6361 twait_block->vtag_block[i].rport = 0; 6362 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6363 (twait_block->vtag_block[i].lport == lport) && 6364 (twait_block->vtag_block[i].rport == rport)) { 6365 /* Bad tag, sorry :< */ 6366 SCTP_INP_INFO_WUNLOCK(); 6367 return (0); 6368 } 6369 } 6370 } 6371 } 6372 SCTP_INP_INFO_RUNLOCK(); 6373 #ifdef MICHAELS_EXPERIMENT 6374 /*- 6375 * Not found, ok to use the tag, add it to the time wait hash 6376 * as well this will prevent two sucessive cookies from getting 6377 * the same tag or two inits sent quickly on multi-processors. 6378 * We only keep the tag for the life of a cookie and when we 6379 * add this tag to the assoc hash we need to purge it from 6380 * the t-wait hash. 6381 */ 6382 SCTP_INP_INFO_WLOCK(); 6383 if (save_in_twait) 6384 sctp_add_vtag_to_timewait(tag, TICKS_TO_SEC(inp->sctp_ep.def_cookie_life, lport, rport)); 6385 SCTP_INP_INFO_WUNLOCK(); 6386 #endif 6387 6388 return (1); 6389 } 6390 6391 6392 static sctp_assoc_t reneged_asoc_ids[256]; 6393 static uint8_t reneged_at = 0; 6394 6395 6396 static void 6397 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6398 { 6399 /* 6400 * We must hunt this association for MBUF's past the cumack (i.e. 6401 * out of order data that we can renege on). 6402 */ 6403 struct sctp_association *asoc; 6404 struct sctp_tmit_chunk *chk, *nchk; 6405 uint32_t cumulative_tsn_p1, tsn; 6406 struct sctp_queued_to_read *ctl, *nctl; 6407 int cnt, strmat, gap; 6408 6409 /* We look for anything larger than the cum-ack + 1 */ 6410 6411 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6412 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6413 return; 6414 } 6415 asoc = &stcb->asoc; 6416 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6417 /* none we can reneg on. */ 6418 return; 6419 } 6420 SCTP_STAT_INCR(sctps_protocol_drains_done); 6421 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6422 cnt = 0; 6423 /* First look in the re-assembly queue */ 6424 chk = TAILQ_FIRST(&asoc->reasmqueue); 6425 while (chk) { 6426 /* Get the next one */ 6427 nchk = TAILQ_NEXT(chk, sctp_next); 6428 if (compare_with_wrap(chk->rec.data.TSN_seq, 6429 cumulative_tsn_p1, MAX_TSN)) { 6430 /* Yep it is above cum-ack */ 6431 cnt++; 6432 tsn = chk->rec.data.TSN_seq; 6433 if (tsn >= asoc->mapping_array_base_tsn) { 6434 gap = tsn - asoc->mapping_array_base_tsn; 6435 } else { 6436 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 6437 tsn + 1; 6438 } 6439 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6440 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6441 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6442 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6443 if (chk->data) { 6444 sctp_m_freem(chk->data); 6445 chk->data = NULL; 6446 } 6447 sctp_free_a_chunk(stcb, chk); 6448 } 6449 chk = nchk; 6450 } 6451 /* Ok that was fun, now we will drain all the inbound streams? */ 6452 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6453 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); 6454 while (ctl) { 6455 nctl = TAILQ_NEXT(ctl, next); 6456 if (compare_with_wrap(ctl->sinfo_tsn, 6457 cumulative_tsn_p1, MAX_TSN)) { 6458 /* Yep it is above cum-ack */ 6459 cnt++; 6460 tsn = ctl->sinfo_tsn; 6461 if (tsn >= asoc->mapping_array_base_tsn) { 6462 gap = tsn - 6463 asoc->mapping_array_base_tsn; 6464 } else { 6465 gap = (MAX_TSN - 6466 asoc->mapping_array_base_tsn) + 6467 tsn + 1; 6468 } 6469 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6470 sctp_ucount_decr(asoc->cnt_on_all_streams); 6471 6472 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, 6473 gap); 6474 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, 6475 ctl, next); 6476 if (ctl->data) { 6477 sctp_m_freem(ctl->data); 6478 ctl->data = NULL; 6479 } 6480 sctp_free_remote_addr(ctl->whoFrom); 6481 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6482 SCTP_DECR_READQ_COUNT(); 6483 } 6484 ctl = nctl; 6485 } 6486 } 6487 /* 6488 * Question, should we go through the delivery queue? The only 6489 * reason things are on here is the app not reading OR a p-d-api up. 6490 * An attacker COULD send enough in to initiate the PD-API and then 6491 * send a bunch of stuff to other streams... these would wind up on 6492 * the delivery queue.. and then we would not get to them. But in 6493 * order to do this I then have to back-track and un-deliver 6494 * sequence numbers in streams.. el-yucko. I think for now we will 6495 * NOT look at the delivery queue and leave it to be something to 6496 * consider later. An alternative would be to abort the P-D-API with 6497 * a notification and then deliver the data.... Or another method 6498 * might be to keep track of how many times the situation occurs and 6499 * if we see a possible attack underway just abort the association. 6500 */ 6501 #ifdef SCTP_DEBUG 6502 if (cnt) { 6503 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6504 } 6505 #endif 6506 if (cnt) { 6507 /* 6508 * Now do we need to find a new 6509 * asoc->highest_tsn_inside_map? 6510 */ 6511 if (asoc->highest_tsn_inside_map >= asoc->mapping_array_base_tsn) { 6512 gap = asoc->highest_tsn_inside_map - asoc->mapping_array_base_tsn; 6513 } else { 6514 gap = (MAX_TSN - asoc->mapping_array_base_tsn) + 6515 asoc->highest_tsn_inside_map + 1; 6516 } 6517 if (gap >= (asoc->mapping_array_size << 3)) { 6518 /* 6519 * Something bad happened or cum-ack and high were 6520 * behind the base, but if so earlier checks should 6521 * have found NO data... wierd... we will start at 6522 * end of mapping array. 6523 */ 6524 SCTP_PRINTF("Gap was larger than array?? %d set to max:%d maparraymax:%x\n", 6525 (int)gap, 6526 (int)(asoc->mapping_array_size << 3), 6527 (int)asoc->highest_tsn_inside_map); 6528 gap = asoc->mapping_array_size << 3; 6529 } 6530 while (gap > 0) { 6531 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6532 /* found the new highest */ 6533 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn + gap; 6534 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) { 6535 sctp_log_map(0, 8, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT); 6536 } 6537 break; 6538 } 6539 gap--; 6540 } 6541 if (gap == 0) { 6542 /* Nothing left in map */ 6543 memset(asoc->mapping_array, 0, asoc->mapping_array_size); 6544 asoc->mapping_array_base_tsn = asoc->cumulative_tsn + 1; 6545 asoc->highest_tsn_inside_map = asoc->cumulative_tsn; 6546 if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MAP_LOGGING_ENABLE) { 6547 sctp_log_map(0, 9, asoc->highest_tsn_inside_map, SCTP_MAP_SLIDE_RESULT); 6548 } 6549 } 6550 asoc->last_revoke_count = cnt; 6551 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6552 /* sa_ignore NO_NULL_CHK */ 6553 sctp_send_sack(stcb); 6554 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6555 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 6556 reneged_at++; 6557 } 6558 /* 6559 * Another issue, in un-setting the TSN's in the mapping array we 6560 * DID NOT adjust the higest_tsn marker. This will cause one of two 6561 * things to occur. It may cause us to do extra work in checking for 6562 * our mapping array movement. More importantly it may cause us to 6563 * SACK every datagram. This may not be a bad thing though since we 6564 * will recover once we get our cum-ack above and all this stuff we 6565 * dumped recovered. 6566 */ 6567 } 6568 6569 void 6570 sctp_drain() 6571 { 6572 /* 6573 * We must walk the PCB lists for ALL associations here. The system 6574 * is LOW on MBUF's and needs help. This is where reneging will 6575 * occur. We really hope this does NOT happen! 6576 */ 6577 struct sctp_inpcb *inp; 6578 struct sctp_tcb *stcb; 6579 6580 SCTP_INP_INFO_RLOCK(); 6581 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6582 /* For each endpoint */ 6583 SCTP_INP_RLOCK(inp); 6584 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6585 /* For each association */ 6586 SCTP_TCB_LOCK(stcb); 6587 sctp_drain_mbufs(inp, stcb); 6588 SCTP_TCB_UNLOCK(stcb); 6589 } 6590 SCTP_INP_RUNLOCK(inp); 6591 } 6592 SCTP_INP_INFO_RUNLOCK(); 6593 } 6594 6595 /* 6596 * start a new iterator 6597 * iterates through all endpoints and associations based on the pcb_state 6598 * flags and asoc_state. "af" (mandatory) is executed for all matching 6599 * assocs and "ef" (optional) is executed when the iterator completes. 6600 * "inpf" (optional) is executed for each new endpoint as it is being 6601 * iterated through. inpe (optional) is called when the inp completes 6602 * its way through all the stcbs. 6603 */ 6604 int 6605 sctp_initiate_iterator(inp_func inpf, 6606 asoc_func af, 6607 inp_func inpe, 6608 uint32_t pcb_state, 6609 uint32_t pcb_features, 6610 uint32_t asoc_state, 6611 void *argp, 6612 uint32_t argi, 6613 end_func ef, 6614 struct sctp_inpcb *s_inp, 6615 uint8_t chunk_output_off) 6616 { 6617 struct sctp_iterator *it = NULL; 6618 6619 if (af == NULL) { 6620 return (-1); 6621 } 6622 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6623 SCTP_M_ITER); 6624 if (it == NULL) { 6625 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6626 return (ENOMEM); 6627 } 6628 memset(it, 0, sizeof(*it)); 6629 it->function_assoc = af; 6630 it->function_inp = inpf; 6631 if (inpf) 6632 it->done_current_ep = 0; 6633 else 6634 it->done_current_ep = 1; 6635 it->function_atend = ef; 6636 it->pointer = argp; 6637 it->val = argi; 6638 it->pcb_flags = pcb_state; 6639 it->pcb_features = pcb_features; 6640 it->asoc_state = asoc_state; 6641 it->function_inp_end = inpe; 6642 it->no_chunk_output = chunk_output_off; 6643 if (s_inp) { 6644 it->inp = s_inp; 6645 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6646 } else { 6647 SCTP_INP_INFO_RLOCK(); 6648 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6649 6650 SCTP_INP_INFO_RUNLOCK(); 6651 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6652 6653 } 6654 SCTP_IPI_ITERATOR_WQ_LOCK(); 6655 if (it->inp) { 6656 SCTP_INP_INCR_REF(it->inp); 6657 } 6658 TAILQ_INSERT_TAIL(&SCTP_BASE_INFO(iteratorhead), it, sctp_nxt_itr); 6659 #if defined(SCTP_USE_THREAD_BASED_ITERATOR) 6660 if (SCTP_BASE_INFO(iterator_running) == 0) { 6661 sctp_wakeup_iterator(); 6662 } 6663 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6664 #else 6665 if (it->inp) 6666 SCTP_INP_DECR_REF(it->inp); 6667 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6668 /* Init the timer */ 6669 SCTP_OS_TIMER_INIT(&it->tmr.timer); 6670 /* add to the list of all iterators */ 6671 sctp_timer_start(SCTP_TIMER_TYPE_ITERATOR, (struct sctp_inpcb *)it, 6672 NULL, NULL); 6673 #endif 6674 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6675 return (0); 6676 } 6677