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