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 static int 1014 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1015 { 1016 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 1017 int ipv4_addr_legal, ipv6_addr_legal; 1018 struct sctp_vrf *vrf; 1019 struct sctp_ifn *sctp_ifn; 1020 struct sctp_ifa *sctp_ifa; 1021 1022 loopback_scope = stcb->asoc.loopback_scope; 1023 ipv4_local_scope = stcb->asoc.ipv4_local_scope; 1024 local_scope = stcb->asoc.local_scope; 1025 site_scope = stcb->asoc.site_scope; 1026 ipv4_addr_legal = ipv6_addr_legal = 0; 1027 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1028 ipv6_addr_legal = 1; 1029 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) { 1030 ipv4_addr_legal = 1; 1031 } 1032 } else { 1033 ipv4_addr_legal = 1; 1034 } 1035 1036 SCTP_IPI_ADDR_RLOCK(); 1037 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1038 if (vrf == NULL) { 1039 /* no vrf, no addresses */ 1040 SCTP_IPI_ADDR_RUNLOCK(); 1041 return (0); 1042 } 1043 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1044 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1045 if ((loopback_scope == 0) && 1046 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1047 continue; 1048 } 1049 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1050 if (sctp_is_addr_restricted(stcb, sctp_ifa)) 1051 continue; 1052 switch (sctp_ifa->address.sa.sa_family) { 1053 #ifdef INET 1054 case AF_INET: 1055 if (ipv4_addr_legal) { 1056 struct sockaddr_in *sin, 1057 *rsin; 1058 1059 sin = &sctp_ifa->address.sin; 1060 rsin = (struct sockaddr_in *)to; 1061 if ((ipv4_local_scope == 0) && 1062 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1063 continue; 1064 } 1065 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1066 SCTP_IPI_ADDR_RUNLOCK(); 1067 return (1); 1068 } 1069 } 1070 break; 1071 #endif 1072 #ifdef INET6 1073 case AF_INET6: 1074 if (ipv6_addr_legal) { 1075 struct sockaddr_in6 *sin6, 1076 *rsin6; 1077 1078 sin6 = &sctp_ifa->address.sin6; 1079 rsin6 = (struct sockaddr_in6 *)to; 1080 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1081 if (local_scope == 0) 1082 continue; 1083 if (sin6->sin6_scope_id == 0) { 1084 if (sa6_recoverscope(sin6) != 0) 1085 continue; 1086 } 1087 } 1088 if ((site_scope == 0) && 1089 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1090 continue; 1091 } 1092 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1093 SCTP_IPI_ADDR_RUNLOCK(); 1094 return (1); 1095 } 1096 } 1097 break; 1098 #endif 1099 default: 1100 /* TSNH */ 1101 break; 1102 } 1103 } 1104 } 1105 } else { 1106 struct sctp_laddr *laddr; 1107 1108 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1109 if (sctp_is_addr_restricted(stcb, laddr->ifa)) { 1110 continue; 1111 } 1112 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 1113 continue; 1114 } 1115 switch (to->sa_family) { 1116 #ifdef INET 1117 case AF_INET: 1118 { 1119 struct sockaddr_in *sin, *rsin; 1120 1121 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 1122 rsin = (struct sockaddr_in *)to; 1123 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1124 SCTP_IPI_ADDR_RUNLOCK(); 1125 return (1); 1126 } 1127 break; 1128 } 1129 #endif 1130 #ifdef INET6 1131 case AF_INET6: 1132 { 1133 struct sockaddr_in6 *sin6, *rsin6; 1134 1135 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1136 rsin6 = (struct sockaddr_in6 *)to; 1137 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1138 SCTP_IPI_ADDR_RUNLOCK(); 1139 return (1); 1140 } 1141 break; 1142 } 1143 1144 #endif 1145 default: 1146 /* TSNH */ 1147 break; 1148 } 1149 1150 } 1151 } 1152 SCTP_IPI_ADDR_RUNLOCK(); 1153 return (0); 1154 } 1155 1156 /* 1157 * rules for use 1158 * 1159 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1160 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1161 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1162 * NULL. 1163 */ 1164 1165 struct sctp_tcb * 1166 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1167 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1168 { 1169 struct sctpasochead *head; 1170 struct sctp_inpcb *inp; 1171 struct sctp_tcb *stcb = NULL; 1172 struct sctp_nets *net; 1173 uint16_t rport; 1174 1175 inp = *inp_p; 1176 if (remote->sa_family == AF_INET) { 1177 rport = (((struct sockaddr_in *)remote)->sin_port); 1178 } else if (remote->sa_family == AF_INET6) { 1179 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1180 } else { 1181 return (NULL); 1182 } 1183 if (locked_tcb) { 1184 /* 1185 * UN-lock so we can do proper locking here this occurs when 1186 * called from load_addresses_from_init. 1187 */ 1188 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1189 SCTP_TCB_UNLOCK(locked_tcb); 1190 } 1191 SCTP_INP_INFO_RLOCK(); 1192 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1193 /*- 1194 * Now either this guy is our listener or it's the 1195 * connector. If it is the one that issued the connect, then 1196 * it's only chance is to be the first TCB in the list. If 1197 * it is the acceptor, then do the special_lookup to hash 1198 * and find the real inp. 1199 */ 1200 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1201 /* to is peer addr, from is my addr */ 1202 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1203 netp, inp->def_vrf_id); 1204 if ((stcb != NULL) && (locked_tcb == NULL)) { 1205 /* we have a locked tcb, lower refcount */ 1206 SCTP_INP_DECR_REF(inp); 1207 } 1208 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1209 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1210 SCTP_TCB_LOCK(locked_tcb); 1211 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1212 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1213 } 1214 SCTP_INP_INFO_RUNLOCK(); 1215 return (stcb); 1216 } else { 1217 SCTP_INP_WLOCK(inp); 1218 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1219 goto null_return; 1220 } 1221 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1222 if (stcb == NULL) { 1223 goto null_return; 1224 } 1225 SCTP_TCB_LOCK(stcb); 1226 1227 if (stcb->rport != rport) { 1228 /* remote port does not match. */ 1229 SCTP_TCB_UNLOCK(stcb); 1230 goto null_return; 1231 } 1232 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1233 SCTP_TCB_UNLOCK(stcb); 1234 goto null_return; 1235 } 1236 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1237 SCTP_TCB_UNLOCK(stcb); 1238 goto null_return; 1239 } 1240 /* now look at the list of remote addresses */ 1241 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1242 #ifdef INVARIANTS 1243 if (net == (TAILQ_NEXT(net, sctp_next))) { 1244 panic("Corrupt net list"); 1245 } 1246 #endif 1247 if (net->ro._l_addr.sa.sa_family != 1248 remote->sa_family) { 1249 /* not the same family */ 1250 continue; 1251 } 1252 switch (remote->sa_family) { 1253 case AF_INET: 1254 { 1255 struct sockaddr_in *sin, 1256 *rsin; 1257 1258 sin = (struct sockaddr_in *) 1259 &net->ro._l_addr; 1260 rsin = (struct sockaddr_in *)remote; 1261 if (sin->sin_addr.s_addr == 1262 rsin->sin_addr.s_addr) { 1263 /* found it */ 1264 if (netp != NULL) { 1265 *netp = net; 1266 } 1267 if (locked_tcb == NULL) { 1268 SCTP_INP_DECR_REF(inp); 1269 } else if (locked_tcb != stcb) { 1270 SCTP_TCB_LOCK(locked_tcb); 1271 } 1272 if (locked_tcb) { 1273 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1274 } 1275 SCTP_INP_WUNLOCK(inp); 1276 SCTP_INP_INFO_RUNLOCK(); 1277 return (stcb); 1278 } 1279 break; 1280 } 1281 #ifdef INET6 1282 case AF_INET6: 1283 { 1284 struct sockaddr_in6 *sin6, 1285 *rsin6; 1286 1287 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1288 rsin6 = (struct sockaddr_in6 *)remote; 1289 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1290 rsin6)) { 1291 /* found it */ 1292 if (netp != NULL) { 1293 *netp = net; 1294 } 1295 if (locked_tcb == NULL) { 1296 SCTP_INP_DECR_REF(inp); 1297 } else if (locked_tcb != stcb) { 1298 SCTP_TCB_LOCK(locked_tcb); 1299 } 1300 if (locked_tcb) { 1301 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1302 } 1303 SCTP_INP_WUNLOCK(inp); 1304 SCTP_INP_INFO_RUNLOCK(); 1305 return (stcb); 1306 } 1307 break; 1308 } 1309 #endif 1310 default: 1311 /* TSNH */ 1312 break; 1313 } 1314 } 1315 SCTP_TCB_UNLOCK(stcb); 1316 } 1317 } else { 1318 SCTP_INP_WLOCK(inp); 1319 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1320 goto null_return; 1321 } 1322 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1323 inp->sctp_hashmark)]; 1324 if (head == NULL) { 1325 goto null_return; 1326 } 1327 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1328 if (stcb->rport != rport) { 1329 /* remote port does not match */ 1330 continue; 1331 } 1332 SCTP_TCB_LOCK(stcb); 1333 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1334 SCTP_TCB_UNLOCK(stcb); 1335 continue; 1336 } 1337 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1338 SCTP_TCB_UNLOCK(stcb); 1339 continue; 1340 } 1341 /* now look at the list of remote addresses */ 1342 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1343 #ifdef INVARIANTS 1344 if (net == (TAILQ_NEXT(net, sctp_next))) { 1345 panic("Corrupt net list"); 1346 } 1347 #endif 1348 if (net->ro._l_addr.sa.sa_family != 1349 remote->sa_family) { 1350 /* not the same family */ 1351 continue; 1352 } 1353 switch (remote->sa_family) { 1354 case AF_INET: 1355 { 1356 struct sockaddr_in *sin, 1357 *rsin; 1358 1359 sin = (struct sockaddr_in *) 1360 &net->ro._l_addr; 1361 rsin = (struct sockaddr_in *)remote; 1362 if (sin->sin_addr.s_addr == 1363 rsin->sin_addr.s_addr) { 1364 /* found it */ 1365 if (netp != NULL) { 1366 *netp = net; 1367 } 1368 if (locked_tcb == NULL) { 1369 SCTP_INP_DECR_REF(inp); 1370 } else if (locked_tcb != stcb) { 1371 SCTP_TCB_LOCK(locked_tcb); 1372 } 1373 if (locked_tcb) { 1374 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1375 } 1376 SCTP_INP_WUNLOCK(inp); 1377 SCTP_INP_INFO_RUNLOCK(); 1378 return (stcb); 1379 } 1380 break; 1381 } 1382 #ifdef INET6 1383 case AF_INET6: 1384 { 1385 struct sockaddr_in6 *sin6, 1386 *rsin6; 1387 1388 sin6 = (struct sockaddr_in6 *) 1389 &net->ro._l_addr; 1390 rsin6 = (struct sockaddr_in6 *)remote; 1391 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1392 rsin6)) { 1393 /* found it */ 1394 if (netp != NULL) { 1395 *netp = net; 1396 } 1397 if (locked_tcb == NULL) { 1398 SCTP_INP_DECR_REF(inp); 1399 } else if (locked_tcb != stcb) { 1400 SCTP_TCB_LOCK(locked_tcb); 1401 } 1402 if (locked_tcb) { 1403 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1404 } 1405 SCTP_INP_WUNLOCK(inp); 1406 SCTP_INP_INFO_RUNLOCK(); 1407 return (stcb); 1408 } 1409 break; 1410 } 1411 #endif 1412 default: 1413 /* TSNH */ 1414 break; 1415 } 1416 } 1417 SCTP_TCB_UNLOCK(stcb); 1418 } 1419 } 1420 null_return: 1421 /* clean up for returning null */ 1422 if (locked_tcb) { 1423 SCTP_TCB_LOCK(locked_tcb); 1424 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1425 } 1426 SCTP_INP_WUNLOCK(inp); 1427 SCTP_INP_INFO_RUNLOCK(); 1428 /* not found */ 1429 return (NULL); 1430 } 1431 1432 /* 1433 * Find an association for a specific endpoint using the association id given 1434 * out in the COMM_UP notification 1435 */ 1436 1437 struct sctp_tcb * 1438 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1439 { 1440 /* 1441 * Use my the assoc_id to find a endpoint 1442 */ 1443 struct sctpasochead *head; 1444 struct sctp_tcb *stcb; 1445 uint32_t id; 1446 1447 if (inp == NULL) { 1448 SCTP_PRINTF("TSNH ep_associd\n"); 1449 return (NULL); 1450 } 1451 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1452 SCTP_PRINTF("TSNH ep_associd0\n"); 1453 return (NULL); 1454 } 1455 id = (uint32_t) asoc_id; 1456 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1457 if (head == NULL) { 1458 /* invalid id TSNH */ 1459 SCTP_PRINTF("TSNH ep_associd1\n"); 1460 return (NULL); 1461 } 1462 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1463 if (stcb->asoc.assoc_id == id) { 1464 if (inp != stcb->sctp_ep) { 1465 /* 1466 * some other guy has the same id active (id 1467 * collision ??). 1468 */ 1469 SCTP_PRINTF("TSNH ep_associd2\n"); 1470 continue; 1471 } 1472 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1473 continue; 1474 } 1475 if (want_lock) { 1476 SCTP_TCB_LOCK(stcb); 1477 } 1478 return (stcb); 1479 } 1480 } 1481 return (NULL); 1482 } 1483 1484 1485 struct sctp_tcb * 1486 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1487 { 1488 struct sctp_tcb *stcb; 1489 1490 SCTP_INP_RLOCK(inp); 1491 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1492 SCTP_INP_RUNLOCK(inp); 1493 return (stcb); 1494 } 1495 1496 1497 static struct sctp_inpcb * 1498 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1499 uint16_t lport, uint32_t vrf_id) 1500 { 1501 struct sctp_inpcb *inp; 1502 struct sockaddr_in *sin; 1503 1504 #ifdef INET6 1505 struct sockaddr_in6 *sin6; 1506 1507 #endif 1508 struct sctp_laddr *laddr; 1509 1510 #ifdef INET6 1511 struct sockaddr_in6 *intf_addr6; 1512 1513 #endif 1514 1515 int fnd; 1516 1517 /* 1518 * Endpoing probe expects that the INP_INFO is locked. 1519 */ 1520 sin = NULL; 1521 #ifdef INET6 1522 sin6 = NULL; 1523 #endif 1524 switch (nam->sa_family) { 1525 case AF_INET: 1526 sin = (struct sockaddr_in *)nam; 1527 break; 1528 #ifdef INET6 1529 case AF_INET6: 1530 sin6 = (struct sockaddr_in6 *)nam; 1531 break; 1532 #endif 1533 default: 1534 /* unsupported family */ 1535 return (NULL); 1536 } 1537 1538 if (head == NULL) 1539 return (NULL); 1540 1541 LIST_FOREACH(inp, head, sctp_hash) { 1542 SCTP_INP_RLOCK(inp); 1543 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1544 SCTP_INP_RUNLOCK(inp); 1545 continue; 1546 } 1547 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1548 (inp->sctp_lport == lport)) { 1549 /* got it */ 1550 if ((nam->sa_family == AF_INET) && 1551 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1552 SCTP_IPV6_V6ONLY(inp)) { 1553 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1554 SCTP_INP_RUNLOCK(inp); 1555 continue; 1556 } 1557 /* A V6 address and the endpoint is NOT bound V6 */ 1558 if (nam->sa_family == AF_INET6 && 1559 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1560 SCTP_INP_RUNLOCK(inp); 1561 continue; 1562 } 1563 /* does a VRF id match? */ 1564 fnd = 0; 1565 if (inp->def_vrf_id == vrf_id) 1566 fnd = 1; 1567 1568 SCTP_INP_RUNLOCK(inp); 1569 if (!fnd) 1570 continue; 1571 return (inp); 1572 } 1573 SCTP_INP_RUNLOCK(inp); 1574 } 1575 if ((nam->sa_family == AF_INET) && 1576 (sin->sin_addr.s_addr == INADDR_ANY)) { 1577 /* Can't hunt for one that has no address specified */ 1578 return (NULL); 1579 } 1580 #ifdef INET6 1581 if ((nam->sa_family == AF_INET6) && 1582 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 1583 /* Can't hunt for one that has no address specified */ 1584 return (NULL); 1585 } 1586 #endif 1587 /* 1588 * ok, not bound to all so see if we can find a EP bound to this 1589 * address. 1590 */ 1591 LIST_FOREACH(inp, head, sctp_hash) { 1592 SCTP_INP_RLOCK(inp); 1593 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1594 SCTP_INP_RUNLOCK(inp); 1595 continue; 1596 } 1597 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1598 SCTP_INP_RUNLOCK(inp); 1599 continue; 1600 } 1601 /* 1602 * Ok this could be a likely candidate, look at all of its 1603 * addresses 1604 */ 1605 if (inp->sctp_lport != lport) { 1606 SCTP_INP_RUNLOCK(inp); 1607 continue; 1608 } 1609 /* does a VRF id match? */ 1610 fnd = 0; 1611 if (inp->def_vrf_id == vrf_id) 1612 fnd = 1; 1613 1614 if (!fnd) { 1615 SCTP_INP_RUNLOCK(inp); 1616 continue; 1617 } 1618 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1619 if (laddr->ifa == NULL) { 1620 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1621 __FUNCTION__); 1622 continue; 1623 } 1624 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1625 laddr->ifa); 1626 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1627 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1628 continue; 1629 } 1630 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1631 /* possible, see if it matches */ 1632 struct sockaddr_in *intf_addr; 1633 1634 intf_addr = &laddr->ifa->address.sin; 1635 switch (nam->sa_family) { 1636 case AF_INET: 1637 if (sin->sin_addr.s_addr == 1638 intf_addr->sin_addr.s_addr) { 1639 SCTP_INP_RUNLOCK(inp); 1640 return (inp); 1641 } 1642 break; 1643 #ifdef INET6 1644 case AF_INET6: 1645 intf_addr6 = &laddr->ifa->address.sin6; 1646 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1647 intf_addr6)) { 1648 SCTP_INP_RUNLOCK(inp); 1649 return (inp); 1650 } 1651 break; 1652 #endif 1653 } 1654 } 1655 } 1656 SCTP_INP_RUNLOCK(inp); 1657 } 1658 return (NULL); 1659 } 1660 1661 1662 static struct sctp_inpcb * 1663 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1664 { 1665 struct sctppcbhead *head; 1666 struct sctp_inpcb *t_inp; 1667 int fnd; 1668 1669 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1670 SCTP_BASE_INFO(hashmark))]; 1671 LIST_FOREACH(t_inp, head, sctp_hash) { 1672 if (t_inp->sctp_lport != lport) { 1673 continue; 1674 } 1675 /* is it in the VRF in question */ 1676 fnd = 0; 1677 if (t_inp->def_vrf_id == vrf_id) 1678 fnd = 1; 1679 if (!fnd) 1680 continue; 1681 1682 /* This one is in use. */ 1683 /* check the v6/v4 binding issue */ 1684 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1685 SCTP_IPV6_V6ONLY(t_inp)) { 1686 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1687 /* collision in V6 space */ 1688 return (t_inp); 1689 } else { 1690 /* inp is BOUND_V4 no conflict */ 1691 continue; 1692 } 1693 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1694 /* t_inp is bound v4 and v6, conflict always */ 1695 return (t_inp); 1696 } else { 1697 /* t_inp is bound only V4 */ 1698 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1699 SCTP_IPV6_V6ONLY(inp)) { 1700 /* no conflict */ 1701 continue; 1702 } 1703 /* else fall through to conflict */ 1704 } 1705 return (t_inp); 1706 } 1707 return (NULL); 1708 } 1709 1710 1711 int 1712 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1713 { 1714 /* For 1-2-1 with port reuse */ 1715 struct sctppcbhead *head; 1716 struct sctp_inpcb *tinp; 1717 1718 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1719 /* only works with port reuse on */ 1720 return (-1); 1721 } 1722 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1723 return (0); 1724 } 1725 SCTP_INP_RUNLOCK(inp); 1726 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1727 SCTP_BASE_INFO(hashmark))]; 1728 /* Kick out all non-listeners to the TCP hash */ 1729 LIST_FOREACH(tinp, head, sctp_hash) { 1730 if (tinp->sctp_lport != inp->sctp_lport) { 1731 continue; 1732 } 1733 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1734 continue; 1735 } 1736 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1737 continue; 1738 } 1739 if (tinp->sctp_socket->so_qlimit) { 1740 continue; 1741 } 1742 SCTP_INP_WLOCK(tinp); 1743 LIST_REMOVE(tinp, sctp_hash); 1744 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1745 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1746 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1747 SCTP_INP_WUNLOCK(tinp); 1748 } 1749 SCTP_INP_WLOCK(inp); 1750 /* Pull from where he was */ 1751 LIST_REMOVE(inp, sctp_hash); 1752 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1753 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1754 LIST_INSERT_HEAD(head, inp, sctp_hash); 1755 SCTP_INP_WUNLOCK(inp); 1756 SCTP_INP_RLOCK(inp); 1757 return (0); 1758 } 1759 1760 1761 struct sctp_inpcb * 1762 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1763 uint32_t vrf_id) 1764 { 1765 /* 1766 * First we check the hash table to see if someone has this port 1767 * bound with just the port. 1768 */ 1769 struct sctp_inpcb *inp; 1770 struct sctppcbhead *head; 1771 struct sockaddr_in *sin; 1772 struct sockaddr_in6 *sin6; 1773 int lport; 1774 1775 if (nam->sa_family == AF_INET) { 1776 sin = (struct sockaddr_in *)nam; 1777 lport = ((struct sockaddr_in *)nam)->sin_port; 1778 } else if (nam->sa_family == AF_INET6) { 1779 sin6 = (struct sockaddr_in6 *)nam; 1780 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1781 } else { 1782 /* unsupported family */ 1783 return (NULL); 1784 } 1785 /* 1786 * I could cheat here and just cast to one of the types but we will 1787 * do it right. It also provides the check against an Unsupported 1788 * type too. 1789 */ 1790 /* Find the head of the ALLADDR chain */ 1791 if (have_lock == 0) { 1792 SCTP_INP_INFO_RLOCK(); 1793 } 1794 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1795 SCTP_BASE_INFO(hashmark))]; 1796 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1797 1798 /* 1799 * If the TCP model exists it could be that the main listening 1800 * endpoint is gone but there exists a connected socket for this guy 1801 * yet. If so we can return the first one that we find. This may NOT 1802 * be the correct one so the caller should be wary on the return 1803 * INP. Currently the onlyc caller that sets this flag is in bindx 1804 * where we are verifying that a user CAN bind the address. He 1805 * either has bound it already, or someone else has, or its open to 1806 * bind, so this is good enough. 1807 */ 1808 if (inp == NULL && find_tcp_pool) { 1809 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 1810 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1811 } 1812 if (inp) { 1813 SCTP_INP_INCR_REF(inp); 1814 } 1815 if (have_lock == 0) { 1816 SCTP_INP_INFO_RUNLOCK(); 1817 } 1818 return (inp); 1819 } 1820 1821 /* 1822 * Find an association for an endpoint with the pointer to whom you want to 1823 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1824 * need to change the *to to some other struct like a mbuf... 1825 */ 1826 struct sctp_tcb * 1827 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1828 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1829 uint32_t vrf_id) 1830 { 1831 struct sctp_inpcb *inp = NULL; 1832 struct sctp_tcb *retval; 1833 1834 SCTP_INP_INFO_RLOCK(); 1835 if (find_tcp_pool) { 1836 if (inp_p != NULL) { 1837 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1838 vrf_id); 1839 } else { 1840 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1841 vrf_id); 1842 } 1843 if (retval != NULL) { 1844 SCTP_INP_INFO_RUNLOCK(); 1845 return (retval); 1846 } 1847 } 1848 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1849 if (inp_p != NULL) { 1850 *inp_p = inp; 1851 } 1852 SCTP_INP_INFO_RUNLOCK(); 1853 1854 if (inp == NULL) { 1855 return (NULL); 1856 } 1857 /* 1858 * ok, we have an endpoint, now lets find the assoc for it (if any) 1859 * we now place the source address or from in the to of the find 1860 * endpoint call. Since in reality this chain is used from the 1861 * inbound packet side. 1862 */ 1863 if (inp_p != NULL) { 1864 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1865 NULL); 1866 } else { 1867 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1868 NULL); 1869 } 1870 return retval; 1871 } 1872 1873 1874 /* 1875 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1876 * find all addresses that the sender has specified in any address list. Each 1877 * address will be used to lookup the TCB and see if one exits. 1878 */ 1879 static struct sctp_tcb * 1880 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1881 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1882 struct sockaddr *dest) 1883 { 1884 struct sockaddr_in sin4; 1885 struct sockaddr_in6 sin6; 1886 struct sctp_paramhdr *phdr, parm_buf; 1887 struct sctp_tcb *retval; 1888 uint32_t ptype, plen; 1889 1890 memset(&sin4, 0, sizeof(sin4)); 1891 memset(&sin6, 0, sizeof(sin6)); 1892 sin4.sin_len = sizeof(sin4); 1893 sin4.sin_family = AF_INET; 1894 sin4.sin_port = sh->src_port; 1895 sin6.sin6_len = sizeof(sin6); 1896 sin6.sin6_family = AF_INET6; 1897 sin6.sin6_port = sh->src_port; 1898 1899 retval = NULL; 1900 offset += sizeof(struct sctp_init_chunk); 1901 1902 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1903 while (phdr != NULL) { 1904 /* now we must see if we want the parameter */ 1905 ptype = ntohs(phdr->param_type); 1906 plen = ntohs(phdr->param_length); 1907 if (plen == 0) { 1908 break; 1909 } 1910 if (ptype == SCTP_IPV4_ADDRESS && 1911 plen == sizeof(struct sctp_ipv4addr_param)) { 1912 /* Get the rest of the address */ 1913 struct sctp_ipv4addr_param ip4_parm, *p4; 1914 1915 phdr = sctp_get_next_param(m, offset, 1916 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1917 if (phdr == NULL) { 1918 return (NULL); 1919 } 1920 p4 = (struct sctp_ipv4addr_param *)phdr; 1921 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 1922 /* look it up */ 1923 retval = sctp_findassociation_ep_addr(inp_p, 1924 (struct sockaddr *)&sin4, netp, dest, NULL); 1925 if (retval != NULL) { 1926 return (retval); 1927 } 1928 } else if (ptype == SCTP_IPV6_ADDRESS && 1929 plen == sizeof(struct sctp_ipv6addr_param)) { 1930 /* Get the rest of the address */ 1931 struct sctp_ipv6addr_param ip6_parm, *p6; 1932 1933 phdr = sctp_get_next_param(m, offset, 1934 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 1935 if (phdr == NULL) { 1936 return (NULL); 1937 } 1938 p6 = (struct sctp_ipv6addr_param *)phdr; 1939 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 1940 /* look it up */ 1941 retval = sctp_findassociation_ep_addr(inp_p, 1942 (struct sockaddr *)&sin6, netp, dest, NULL); 1943 if (retval != NULL) { 1944 return (retval); 1945 } 1946 } 1947 offset += SCTP_SIZE32(plen); 1948 phdr = sctp_get_next_param(m, offset, &parm_buf, 1949 sizeof(parm_buf)); 1950 } 1951 return (NULL); 1952 } 1953 1954 static struct sctp_tcb * 1955 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 1956 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 1957 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 1958 { 1959 /* 1960 * Use my vtag to hash. If we find it we then verify the source addr 1961 * is in the assoc. If all goes well we save a bit on rec of a 1962 * packet. 1963 */ 1964 struct sctpasochead *head; 1965 struct sctp_nets *net; 1966 struct sctp_tcb *stcb; 1967 1968 *netp = NULL; 1969 *inp_p = NULL; 1970 SCTP_INP_INFO_RLOCK(); 1971 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 1972 SCTP_BASE_INFO(hashasocmark))]; 1973 if (head == NULL) { 1974 /* invalid vtag */ 1975 SCTP_INP_INFO_RUNLOCK(); 1976 return (NULL); 1977 } 1978 LIST_FOREACH(stcb, head, sctp_asocs) { 1979 SCTP_INP_RLOCK(stcb->sctp_ep); 1980 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1981 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1982 continue; 1983 } 1984 SCTP_TCB_LOCK(stcb); 1985 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1986 if (stcb->asoc.my_vtag == vtag) { 1987 /* candidate */ 1988 if (stcb->rport != rport) { 1989 SCTP_TCB_UNLOCK(stcb); 1990 continue; 1991 } 1992 if (stcb->sctp_ep->sctp_lport != lport) { 1993 SCTP_TCB_UNLOCK(stcb); 1994 continue; 1995 } 1996 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1997 SCTP_TCB_UNLOCK(stcb); 1998 continue; 1999 } 2000 /* RRS:Need toaddr check here */ 2001 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2002 /* Endpoint does not own this address */ 2003 SCTP_TCB_UNLOCK(stcb); 2004 continue; 2005 } 2006 if (remote_tag) { 2007 /* 2008 * If we have both vtags thats all we match 2009 * on 2010 */ 2011 if (stcb->asoc.peer_vtag == remote_tag) { 2012 /* 2013 * If both tags match we consider it 2014 * conclusive and check NO 2015 * source/destination addresses 2016 */ 2017 goto conclusive; 2018 } 2019 } 2020 if (skip_src_check) { 2021 conclusive: 2022 if (from) { 2023 net = sctp_findnet(stcb, from); 2024 } else { 2025 *netp = NULL; /* unknown */ 2026 } 2027 if (inp_p) 2028 *inp_p = stcb->sctp_ep; 2029 SCTP_INP_INFO_RUNLOCK(); 2030 return (stcb); 2031 } 2032 net = sctp_findnet(stcb, from); 2033 if (net) { 2034 /* yep its him. */ 2035 *netp = net; 2036 SCTP_STAT_INCR(sctps_vtagexpress); 2037 *inp_p = stcb->sctp_ep; 2038 SCTP_INP_INFO_RUNLOCK(); 2039 return (stcb); 2040 } else { 2041 /* 2042 * not him, this should only happen in rare 2043 * cases so I peg it. 2044 */ 2045 SCTP_STAT_INCR(sctps_vtagbogus); 2046 } 2047 } 2048 SCTP_TCB_UNLOCK(stcb); 2049 } 2050 SCTP_INP_INFO_RUNLOCK(); 2051 return (NULL); 2052 } 2053 2054 /* 2055 * Find an association with the pointer to the inbound IP packet. This can be 2056 * a IPv4 or IPv6 packet. 2057 */ 2058 struct sctp_tcb * 2059 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 2060 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2061 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2062 { 2063 int find_tcp_pool; 2064 struct ip *iph; 2065 struct sctp_tcb *retval; 2066 struct sockaddr_storage to_store, from_store; 2067 struct sockaddr *to = (struct sockaddr *)&to_store; 2068 struct sockaddr *from = (struct sockaddr *)&from_store; 2069 struct sctp_inpcb *inp; 2070 2071 iph = mtod(m, struct ip *); 2072 switch (iph->ip_v) { 2073 case IPVERSION: 2074 { 2075 /* its IPv4 */ 2076 struct sockaddr_in *from4; 2077 2078 from4 = (struct sockaddr_in *)&from_store; 2079 bzero(from4, sizeof(*from4)); 2080 from4->sin_family = AF_INET; 2081 from4->sin_len = sizeof(struct sockaddr_in); 2082 from4->sin_addr.s_addr = iph->ip_src.s_addr; 2083 from4->sin_port = sh->src_port; 2084 break; 2085 } 2086 #ifdef INET6 2087 case IPV6_VERSION >> 4: 2088 { 2089 /* its IPv6 */ 2090 struct ip6_hdr *ip6; 2091 struct sockaddr_in6 *from6; 2092 2093 ip6 = mtod(m, struct ip6_hdr *); 2094 from6 = (struct sockaddr_in6 *)&from_store; 2095 bzero(from6, sizeof(*from6)); 2096 from6->sin6_family = AF_INET6; 2097 from6->sin6_len = sizeof(struct sockaddr_in6); 2098 from6->sin6_addr = ip6->ip6_src; 2099 from6->sin6_port = sh->src_port; 2100 /* Get the scopes in properly to the sin6 addr's */ 2101 /* we probably don't need these operations */ 2102 (void)sa6_recoverscope(from6); 2103 sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone)); 2104 break; 2105 } 2106 #endif 2107 default: 2108 /* Currently not supported. */ 2109 return (NULL); 2110 } 2111 2112 2113 switch (iph->ip_v) { 2114 case IPVERSION: 2115 { 2116 /* its IPv4 */ 2117 struct sockaddr_in *to4; 2118 2119 to4 = (struct sockaddr_in *)&to_store; 2120 bzero(to4, sizeof(*to4)); 2121 to4->sin_family = AF_INET; 2122 to4->sin_len = sizeof(struct sockaddr_in); 2123 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 2124 to4->sin_port = sh->dest_port; 2125 break; 2126 } 2127 #ifdef INET6 2128 case IPV6_VERSION >> 4: 2129 { 2130 /* its IPv6 */ 2131 struct ip6_hdr *ip6; 2132 struct sockaddr_in6 *to6; 2133 2134 ip6 = mtod(m, struct ip6_hdr *); 2135 to6 = (struct sockaddr_in6 *)&to_store; 2136 bzero(to6, sizeof(*to6)); 2137 to6->sin6_family = AF_INET6; 2138 to6->sin6_len = sizeof(struct sockaddr_in6); 2139 to6->sin6_addr = ip6->ip6_dst; 2140 to6->sin6_port = sh->dest_port; 2141 /* Get the scopes in properly to the sin6 addr's */ 2142 /* we probably don't need these operations */ 2143 (void)sa6_recoverscope(to6); 2144 sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone)); 2145 break; 2146 } 2147 #endif 2148 default: 2149 /* TSNH */ 2150 break; 2151 } 2152 if (sh->v_tag) { 2153 /* we only go down this path if vtag is non-zero */ 2154 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag), 2155 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2156 if (retval) { 2157 return (retval); 2158 } 2159 } 2160 find_tcp_pool = 0; 2161 if ((ch->chunk_type != SCTP_INITIATION) && 2162 (ch->chunk_type != SCTP_INITIATION_ACK) && 2163 (ch->chunk_type != SCTP_COOKIE_ACK) && 2164 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2165 /* Other chunk types go to the tcp pool. */ 2166 find_tcp_pool = 1; 2167 } 2168 if (inp_p) { 2169 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 2170 find_tcp_pool, vrf_id); 2171 inp = *inp_p; 2172 } else { 2173 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 2174 find_tcp_pool, vrf_id); 2175 } 2176 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2177 if (retval == NULL && inp) { 2178 /* Found a EP but not this address */ 2179 if ((ch->chunk_type == SCTP_INITIATION) || 2180 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2181 /*- 2182 * special hook, we do NOT return linp or an 2183 * association that is linked to an existing 2184 * association that is under the TCP pool (i.e. no 2185 * listener exists). The endpoint finding routine 2186 * will always find a listner before examining the 2187 * TCP pool. 2188 */ 2189 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2190 if (inp_p) { 2191 *inp_p = NULL; 2192 } 2193 return (NULL); 2194 } 2195 retval = sctp_findassociation_special_addr(m, iphlen, 2196 offset, sh, &inp, netp, to); 2197 if (inp_p != NULL) { 2198 *inp_p = inp; 2199 } 2200 } 2201 } 2202 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2203 return (retval); 2204 } 2205 2206 /* 2207 * lookup an association by an ASCONF lookup address. 2208 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2209 */ 2210 struct sctp_tcb * 2211 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 2212 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2213 { 2214 struct sctp_tcb *stcb; 2215 struct sockaddr_in *sin; 2216 2217 #ifdef INET6 2218 struct sockaddr_in6 *sin6; 2219 2220 #endif 2221 struct sockaddr_storage local_store, remote_store; 2222 struct sockaddr *to; 2223 struct ip *iph; 2224 2225 #ifdef INET6 2226 struct ip6_hdr *ip6; 2227 2228 #endif 2229 struct sctp_paramhdr parm_buf, *phdr; 2230 int ptype; 2231 int zero_address = 0; 2232 2233 2234 memset(&local_store, 0, sizeof(local_store)); 2235 memset(&remote_store, 0, sizeof(remote_store)); 2236 to = (struct sockaddr *)&local_store; 2237 /* First get the destination address setup too. */ 2238 iph = mtod(m, struct ip *); 2239 switch (iph->ip_v) { 2240 case IPVERSION: 2241 /* its IPv4 */ 2242 sin = (struct sockaddr_in *)&local_store; 2243 sin->sin_family = AF_INET; 2244 sin->sin_len = sizeof(*sin); 2245 sin->sin_port = sh->dest_port; 2246 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 2247 break; 2248 #ifdef INET6 2249 case IPV6_VERSION >> 4: 2250 /* its IPv6 */ 2251 ip6 = mtod(m, struct ip6_hdr *); 2252 sin6 = (struct sockaddr_in6 *)&local_store; 2253 sin6->sin6_family = AF_INET6; 2254 sin6->sin6_len = sizeof(*sin6); 2255 sin6->sin6_port = sh->dest_port; 2256 sin6->sin6_addr = ip6->ip6_dst; 2257 break; 2258 #endif 2259 default: 2260 return NULL; 2261 } 2262 2263 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2264 &parm_buf, sizeof(struct sctp_paramhdr)); 2265 if (phdr == NULL) { 2266 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2267 __FUNCTION__); 2268 return NULL; 2269 } 2270 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2271 /* get the correlation address */ 2272 switch (ptype) { 2273 #ifdef INET6 2274 case SCTP_IPV6_ADDRESS: 2275 { 2276 /* ipv6 address param */ 2277 struct sctp_ipv6addr_param *p6, p6_buf; 2278 2279 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2280 return NULL; 2281 } 2282 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2283 offset + sizeof(struct sctp_asconf_chunk), 2284 &p6_buf.ph, sizeof(*p6)); 2285 if (p6 == NULL) { 2286 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2287 __FUNCTION__); 2288 return (NULL); 2289 } 2290 sin6 = (struct sockaddr_in6 *)&remote_store; 2291 sin6->sin6_family = AF_INET6; 2292 sin6->sin6_len = sizeof(*sin6); 2293 sin6->sin6_port = sh->src_port; 2294 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2295 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2296 zero_address = 1; 2297 break; 2298 } 2299 #endif 2300 case SCTP_IPV4_ADDRESS: 2301 { 2302 /* ipv4 address param */ 2303 struct sctp_ipv4addr_param *p4, p4_buf; 2304 2305 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2306 return NULL; 2307 } 2308 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2309 offset + sizeof(struct sctp_asconf_chunk), 2310 &p4_buf.ph, sizeof(*p4)); 2311 if (p4 == NULL) { 2312 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2313 __FUNCTION__); 2314 return (NULL); 2315 } 2316 sin = (struct sockaddr_in *)&remote_store; 2317 sin->sin_family = AF_INET; 2318 sin->sin_len = sizeof(*sin); 2319 sin->sin_port = sh->src_port; 2320 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2321 if (sin->sin_addr.s_addr == INADDR_ANY) 2322 zero_address = 1; 2323 break; 2324 } 2325 default: 2326 /* invalid address param type */ 2327 return NULL; 2328 } 2329 2330 if (zero_address) { 2331 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p, 2332 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2333 /* 2334 * printf("findassociation_ep_asconf: zero lookup address 2335 * finds stcb 0x%x\n", (uint32_t)stcb); 2336 */ 2337 } else { 2338 stcb = sctp_findassociation_ep_addr(inp_p, 2339 (struct sockaddr *)&remote_store, netp, 2340 to, NULL); 2341 } 2342 return (stcb); 2343 } 2344 2345 2346 /* 2347 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2348 * addresses. This way if we don't get a bind we by default pick a ephemeral 2349 * port with all addresses bound. 2350 */ 2351 int 2352 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2353 { 2354 /* 2355 * we get called when a new endpoint starts up. We need to allocate 2356 * the sctp_inpcb structure from the zone and init it. Mark it as 2357 * unbound and find a port that we can use as an ephemeral with 2358 * INADDR_ANY. If the user binds later no problem we can then add in 2359 * the specific addresses. And setup the default parameters for the 2360 * EP. 2361 */ 2362 int i, error; 2363 struct sctp_inpcb *inp; 2364 struct sctp_pcb *m; 2365 struct timeval time; 2366 sctp_sharedkey_t *null_key; 2367 2368 error = 0; 2369 2370 SCTP_INP_INFO_WLOCK(); 2371 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2372 if (inp == NULL) { 2373 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2374 SCTP_INP_INFO_WUNLOCK(); 2375 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2376 return (ENOBUFS); 2377 } 2378 /* zap it */ 2379 bzero(inp, sizeof(*inp)); 2380 2381 /* bump generations */ 2382 /* setup socket pointers */ 2383 inp->sctp_socket = so; 2384 inp->ip_inp.inp.inp_socket = so; 2385 inp->sctp_associd_counter = 1; 2386 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2387 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2388 /* init the small hash table we use to track asocid <-> tcb */ 2389 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2390 if (inp->sctp_asocidhash == NULL) { 2391 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2392 SCTP_INP_INFO_WUNLOCK(); 2393 return (ENOBUFS); 2394 } 2395 #ifdef IPSEC 2396 { 2397 struct inpcbpolicy *pcb_sp = NULL; 2398 2399 error = ipsec_init_policy(so, &pcb_sp); 2400 /* Arrange to share the policy */ 2401 inp->ip_inp.inp.inp_sp = pcb_sp; 2402 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2403 } 2404 if (error != 0) { 2405 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2406 SCTP_INP_INFO_WUNLOCK(); 2407 return error; 2408 } 2409 #endif /* IPSEC */ 2410 SCTP_INCR_EP_COUNT(); 2411 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2412 SCTP_INP_INFO_WUNLOCK(); 2413 2414 so->so_pcb = (caddr_t)inp; 2415 2416 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 2417 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 2418 /* UDP style socket */ 2419 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2420 SCTP_PCB_FLAGS_UNBOUND); 2421 /* Be sure it is NON-BLOCKING IO for UDP */ 2422 /* SCTP_SET_SO_NBIO(so); */ 2423 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2424 /* TCP style socket */ 2425 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2426 SCTP_PCB_FLAGS_UNBOUND); 2427 /* Be sure we have blocking IO by default */ 2428 SCTP_CLEAR_SO_NBIO(so); 2429 } else { 2430 /* 2431 * unsupported socket type (RAW, etc)- in case we missed it 2432 * in protosw 2433 */ 2434 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2435 so->so_pcb = NULL; 2436 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2437 return (EOPNOTSUPP); 2438 } 2439 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2440 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2441 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2442 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2443 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2444 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2445 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2446 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2447 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2448 } 2449 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2450 &inp->sctp_hashmark); 2451 if (inp->sctp_tcbhash == NULL) { 2452 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2453 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2454 so->so_pcb = NULL; 2455 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2456 return (ENOBUFS); 2457 } 2458 inp->def_vrf_id = vrf_id; 2459 2460 SCTP_INP_INFO_WLOCK(); 2461 SCTP_INP_LOCK_INIT(inp); 2462 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2463 SCTP_INP_READ_INIT(inp); 2464 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2465 /* lock the new ep */ 2466 SCTP_INP_WLOCK(inp); 2467 2468 /* add it to the info area */ 2469 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2470 SCTP_INP_INFO_WUNLOCK(); 2471 2472 TAILQ_INIT(&inp->read_queue); 2473 LIST_INIT(&inp->sctp_addr_list); 2474 2475 LIST_INIT(&inp->sctp_asoc_list); 2476 2477 #ifdef SCTP_TRACK_FREED_ASOCS 2478 /* TEMP CODE */ 2479 LIST_INIT(&inp->sctp_asoc_free_list); 2480 #endif 2481 /* Init the timer structure for signature change */ 2482 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2483 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2484 2485 /* now init the actual endpoint default data */ 2486 m = &inp->sctp_ep; 2487 2488 /* setup the base timeout information */ 2489 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2490 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2491 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2492 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2493 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2494 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2495 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2496 /* all max/min max are in ms */ 2497 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2498 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2499 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2500 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2501 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2502 2503 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2504 2505 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2506 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2507 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2508 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2509 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2510 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2511 if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) && 2512 (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) { 2513 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2514 } else { 2515 /* sysctl done with invalid value, set to 2581 */ 2516 m->sctp_default_cc_module = SCTP_CC_RFC2581; 2517 } 2518 /* number of streams to pre-open on a association */ 2519 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2520 2521 /* Add adaptation cookie */ 2522 m->adaptation_layer_indicator = 0x504C5253; 2523 2524 /* seed random number generator */ 2525 m->random_counter = 1; 2526 m->store_at = SCTP_SIGNATURE_SIZE; 2527 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2528 sctp_fill_random_store(m); 2529 2530 /* Minimum cookie size */ 2531 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2532 sizeof(struct sctp_state_cookie); 2533 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2534 2535 /* Setup the initial secret */ 2536 (void)SCTP_GETTIME_TIMEVAL(&time); 2537 m->time_of_secret_change = time.tv_sec; 2538 2539 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2540 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2541 } 2542 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2543 2544 /* How long is a cookie good for ? */ 2545 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2546 /* 2547 * Initialize authentication parameters 2548 */ 2549 m->local_hmacs = sctp_default_supported_hmaclist(); 2550 m->local_auth_chunks = sctp_alloc_chunklist(); 2551 sctp_auth_set_default_chunks(m->local_auth_chunks); 2552 LIST_INIT(&m->shared_keys); 2553 /* add default NULL key as key id 0 */ 2554 null_key = sctp_alloc_sharedkey(); 2555 sctp_insert_sharedkey(&m->shared_keys, null_key); 2556 SCTP_INP_WUNLOCK(inp); 2557 #ifdef SCTP_LOG_CLOSING 2558 sctp_log_closing(inp, NULL, 12); 2559 #endif 2560 return (error); 2561 } 2562 2563 2564 void 2565 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2566 struct sctp_tcb *stcb) 2567 { 2568 struct sctp_nets *net; 2569 uint16_t lport, rport; 2570 struct sctppcbhead *head; 2571 struct sctp_laddr *laddr, *oladdr; 2572 2573 atomic_add_int(&stcb->asoc.refcnt, 1); 2574 SCTP_TCB_UNLOCK(stcb); 2575 SCTP_INP_INFO_WLOCK(); 2576 SCTP_INP_WLOCK(old_inp); 2577 SCTP_INP_WLOCK(new_inp); 2578 SCTP_TCB_LOCK(stcb); 2579 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2580 2581 new_inp->sctp_ep.time_of_secret_change = 2582 old_inp->sctp_ep.time_of_secret_change; 2583 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2584 sizeof(old_inp->sctp_ep.secret_key)); 2585 new_inp->sctp_ep.current_secret_number = 2586 old_inp->sctp_ep.current_secret_number; 2587 new_inp->sctp_ep.last_secret_number = 2588 old_inp->sctp_ep.last_secret_number; 2589 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2590 2591 /* make it so new data pours into the new socket */ 2592 stcb->sctp_socket = new_inp->sctp_socket; 2593 stcb->sctp_ep = new_inp; 2594 2595 /* Copy the port across */ 2596 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2597 rport = stcb->rport; 2598 /* Pull the tcb from the old association */ 2599 LIST_REMOVE(stcb, sctp_tcbhash); 2600 LIST_REMOVE(stcb, sctp_tcblist); 2601 if (stcb->asoc.in_asocid_hash) { 2602 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2603 } 2604 /* Now insert the new_inp into the TCP connected hash */ 2605 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), 2606 SCTP_BASE_INFO(hashtcpmark))]; 2607 2608 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2609 /* Its safe to access */ 2610 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2611 2612 /* Now move the tcb into the endpoint list */ 2613 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2614 /* 2615 * Question, do we even need to worry about the ep-hash since we 2616 * only have one connection? Probably not :> so lets get rid of it 2617 * and not suck up any kernel memory in that. 2618 */ 2619 if (stcb->asoc.in_asocid_hash) { 2620 struct sctpasochead *lhd; 2621 2622 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2623 new_inp->hashasocidmark)]; 2624 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2625 } 2626 /* Ok. Let's restart timer. */ 2627 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2628 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2629 stcb, net); 2630 } 2631 2632 SCTP_INP_INFO_WUNLOCK(); 2633 if (new_inp->sctp_tcbhash != NULL) { 2634 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2635 new_inp->sctp_tcbhash = NULL; 2636 } 2637 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2638 /* Subset bound, so copy in the laddr list from the old_inp */ 2639 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2640 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2641 if (laddr == NULL) { 2642 /* 2643 * Gak, what can we do? This assoc is really 2644 * HOSED. We probably should send an abort 2645 * here. 2646 */ 2647 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2648 continue; 2649 } 2650 SCTP_INCR_LADDR_COUNT(); 2651 bzero(laddr, sizeof(*laddr)); 2652 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2653 laddr->ifa = oladdr->ifa; 2654 atomic_add_int(&laddr->ifa->refcount, 1); 2655 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2656 sctp_nxt_addr); 2657 new_inp->laddr_count++; 2658 } 2659 } 2660 /* 2661 * Now any running timers need to be adjusted since we really don't 2662 * care if they are running or not just blast in the new_inp into 2663 * all of them. 2664 */ 2665 2666 stcb->asoc.hb_timer.ep = (void *)new_inp; 2667 stcb->asoc.dack_timer.ep = (void *)new_inp; 2668 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2669 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2670 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2671 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2672 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2673 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2674 /* now what about the nets? */ 2675 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2676 net->pmtu_timer.ep = (void *)new_inp; 2677 net->rxt_timer.ep = (void *)new_inp; 2678 net->fr_timer.ep = (void *)new_inp; 2679 } 2680 SCTP_INP_WUNLOCK(new_inp); 2681 SCTP_INP_WUNLOCK(old_inp); 2682 } 2683 2684 2685 2686 2687 /* sctp_ifap is used to bypass normal local address validation checks */ 2688 int 2689 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2690 struct sctp_ifa *sctp_ifap, struct thread *p) 2691 { 2692 /* bind a ep to a socket address */ 2693 struct sctppcbhead *head; 2694 struct sctp_inpcb *inp, *inp_tmp; 2695 struct inpcb *ip_inp; 2696 int port_reuse_active = 0; 2697 int bindall; 2698 uint16_t lport; 2699 int error; 2700 uint32_t vrf_id; 2701 2702 lport = 0; 2703 error = 0; 2704 bindall = 1; 2705 inp = (struct sctp_inpcb *)so->so_pcb; 2706 ip_inp = (struct inpcb *)so->so_pcb; 2707 #ifdef SCTP_DEBUG 2708 if (addr) { 2709 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2710 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2711 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2712 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2713 } 2714 #endif 2715 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2716 /* already did a bind, subsequent binds NOT allowed ! */ 2717 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2718 return (EINVAL); 2719 } 2720 #ifdef INVARIANTS 2721 if (p == NULL) 2722 panic("null proc/thread"); 2723 #endif 2724 if (addr != NULL) { 2725 switch (addr->sa_family) { 2726 case AF_INET: 2727 { 2728 struct sockaddr_in *sin; 2729 2730 /* IPV6_V6ONLY socket? */ 2731 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2732 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2733 return (EINVAL); 2734 } 2735 if (addr->sa_len != sizeof(*sin)) { 2736 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2737 return (EINVAL); 2738 } 2739 sin = (struct sockaddr_in *)addr; 2740 lport = sin->sin_port; 2741 /* 2742 * For LOOPBACK the prison_local_ip4() call 2743 * will transmute the ip address to the 2744 * proper value. 2745 */ 2746 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2747 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2748 return (error); 2749 } 2750 if (sin->sin_addr.s_addr != INADDR_ANY) { 2751 bindall = 0; 2752 } 2753 break; 2754 } 2755 #ifdef INET6 2756 case AF_INET6: 2757 { 2758 /* 2759 * Only for pure IPv6 Address. (No IPv4 2760 * Mapped!) 2761 */ 2762 struct sockaddr_in6 *sin6; 2763 2764 sin6 = (struct sockaddr_in6 *)addr; 2765 2766 if (addr->sa_len != sizeof(*sin6)) { 2767 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2768 return (EINVAL); 2769 } 2770 lport = sin6->sin6_port; 2771 2772 /* 2773 * For LOOPBACK the prison_local_ip6() call 2774 * will transmute the ipv6 address to the 2775 * proper value. 2776 */ 2777 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2778 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2779 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2780 return (error); 2781 } 2782 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2783 bindall = 0; 2784 /* KAME hack: embed scopeid */ 2785 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2786 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2787 return (EINVAL); 2788 } 2789 } 2790 /* this must be cleared for ifa_ifwithaddr() */ 2791 sin6->sin6_scope_id = 0; 2792 break; 2793 } 2794 #endif 2795 default: 2796 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2797 return (EAFNOSUPPORT); 2798 } 2799 } 2800 SCTP_INP_INFO_WLOCK(); 2801 SCTP_INP_WLOCK(inp); 2802 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2803 vrf_id = inp->def_vrf_id; 2804 2805 /* increase our count due to the unlock we do */ 2806 SCTP_INP_INCR_REF(inp); 2807 if (lport) { 2808 /* 2809 * Did the caller specify a port? if so we must see if a ep 2810 * already has this one bound. 2811 */ 2812 /* got to be root to get at low ports */ 2813 if (ntohs(lport) < IPPORT_RESERVED) { 2814 if (p && (error = 2815 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2816 )) { 2817 SCTP_INP_DECR_REF(inp); 2818 SCTP_INP_WUNLOCK(inp); 2819 SCTP_INP_INFO_WUNLOCK(); 2820 return (error); 2821 } 2822 } 2823 if (p == NULL) { 2824 SCTP_INP_DECR_REF(inp); 2825 SCTP_INP_WUNLOCK(inp); 2826 SCTP_INP_INFO_WUNLOCK(); 2827 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2828 return (error); 2829 } 2830 SCTP_INP_WUNLOCK(inp); 2831 if (bindall) { 2832 vrf_id = inp->def_vrf_id; 2833 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2834 if (inp_tmp != NULL) { 2835 /* 2836 * lock guy returned and lower count note 2837 * that we are not bound so inp_tmp should 2838 * NEVER be inp. And it is this inp 2839 * (inp_tmp) that gets the reference bump, 2840 * so we must lower it. 2841 */ 2842 SCTP_INP_DECR_REF(inp_tmp); 2843 /* unlock info */ 2844 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2845 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2846 /* 2847 * Ok, must be one-2-one and 2848 * allowing port re-use 2849 */ 2850 port_reuse_active = 1; 2851 goto continue_anyway; 2852 } 2853 SCTP_INP_DECR_REF(inp); 2854 SCTP_INP_INFO_WUNLOCK(); 2855 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2856 return (EADDRINUSE); 2857 } 2858 } else { 2859 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2860 if (inp_tmp != NULL) { 2861 /* 2862 * lock guy returned and lower count note 2863 * that we are not bound so inp_tmp should 2864 * NEVER be inp. And it is this inp 2865 * (inp_tmp) that gets the reference bump, 2866 * so we must lower it. 2867 */ 2868 SCTP_INP_DECR_REF(inp_tmp); 2869 /* unlock info */ 2870 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2871 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2872 /* 2873 * Ok, must be one-2-one and 2874 * allowing port re-use 2875 */ 2876 port_reuse_active = 1; 2877 goto continue_anyway; 2878 } 2879 SCTP_INP_DECR_REF(inp); 2880 SCTP_INP_INFO_WUNLOCK(); 2881 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2882 return (EADDRINUSE); 2883 } 2884 } 2885 continue_anyway: 2886 SCTP_INP_WLOCK(inp); 2887 if (bindall) { 2888 /* verify that no lport is not used by a singleton */ 2889 if ((port_reuse_active == 0) && 2890 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2891 ) { 2892 /* Sorry someone already has this one bound */ 2893 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2894 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2895 port_reuse_active = 1; 2896 } else { 2897 SCTP_INP_DECR_REF(inp); 2898 SCTP_INP_WUNLOCK(inp); 2899 SCTP_INP_INFO_WUNLOCK(); 2900 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2901 return (EADDRINUSE); 2902 } 2903 } 2904 } 2905 } else { 2906 uint16_t first, last, candidate; 2907 uint16_t count; 2908 int done; 2909 2910 if (ip_inp->inp_flags & INP_HIGHPORT) { 2911 first = MODULE_GLOBAL(ipport_hifirstauto); 2912 last = MODULE_GLOBAL(ipport_hilastauto); 2913 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2914 if (p && (error = 2915 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2916 )) { 2917 SCTP_INP_DECR_REF(inp); 2918 SCTP_INP_WUNLOCK(inp); 2919 SCTP_INP_INFO_WUNLOCK(); 2920 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2921 return (error); 2922 } 2923 first = MODULE_GLOBAL(ipport_lowfirstauto); 2924 last = MODULE_GLOBAL(ipport_lowlastauto); 2925 } else { 2926 first = MODULE_GLOBAL(ipport_firstauto); 2927 last = MODULE_GLOBAL(ipport_lastauto); 2928 } 2929 if (first > last) { 2930 uint16_t temp; 2931 2932 temp = first; 2933 first = last; 2934 last = temp; 2935 } 2936 count = last - first + 1; /* number of candidates */ 2937 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2938 2939 done = 0; 2940 while (!done) { 2941 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2942 done = 1; 2943 } 2944 if (!done) { 2945 if (--count == 0) { 2946 SCTP_INP_DECR_REF(inp); 2947 SCTP_INP_WUNLOCK(inp); 2948 SCTP_INP_INFO_WUNLOCK(); 2949 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2950 return (EADDRINUSE); 2951 } 2952 if (candidate == last) 2953 candidate = first; 2954 else 2955 candidate = candidate + 1; 2956 } 2957 } 2958 lport = htons(candidate); 2959 } 2960 SCTP_INP_DECR_REF(inp); 2961 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2962 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2963 /* 2964 * this really should not happen. The guy did a non-blocking 2965 * bind and then did a close at the same time. 2966 */ 2967 SCTP_INP_WUNLOCK(inp); 2968 SCTP_INP_INFO_WUNLOCK(); 2969 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2970 return (EINVAL); 2971 } 2972 /* ok we look clear to give out this port, so lets setup the binding */ 2973 if (bindall) { 2974 /* binding to all addresses, so just set in the proper flags */ 2975 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2976 /* set the automatic addr changes from kernel flag */ 2977 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2978 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2979 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2980 } else { 2981 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2982 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2983 } 2984 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2985 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2986 } else { 2987 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2988 } 2989 /* 2990 * set the automatic mobility_base from kernel flag (by 2991 * micchie) 2992 */ 2993 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 2994 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 2995 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2996 } else { 2997 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 2998 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2999 } 3000 /* 3001 * set the automatic mobility_fasthandoff from kernel flag 3002 * (by micchie) 3003 */ 3004 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3005 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3006 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3007 } else { 3008 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3009 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3010 } 3011 } else { 3012 /* 3013 * bind specific, make sure flags is off and add a new 3014 * address structure to the sctp_addr_list inside the ep 3015 * structure. 3016 * 3017 * We will need to allocate one and insert it at the head. The 3018 * socketopt call can just insert new addresses in there as 3019 * well. It will also have to do the embed scope kame hack 3020 * too (before adding). 3021 */ 3022 struct sctp_ifa *ifa; 3023 struct sockaddr_storage store_sa; 3024 3025 memset(&store_sa, 0, sizeof(store_sa)); 3026 if (addr->sa_family == AF_INET) { 3027 struct sockaddr_in *sin; 3028 3029 sin = (struct sockaddr_in *)&store_sa; 3030 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3031 sin->sin_port = 0; 3032 } else if (addr->sa_family == AF_INET6) { 3033 struct sockaddr_in6 *sin6; 3034 3035 sin6 = (struct sockaddr_in6 *)&store_sa; 3036 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3037 sin6->sin6_port = 0; 3038 } 3039 /* 3040 * first find the interface with the bound address need to 3041 * zero out the port to find the address! yuck! can't do 3042 * this earlier since need port for sctp_pcb_findep() 3043 */ 3044 if (sctp_ifap != NULL) 3045 ifa = sctp_ifap; 3046 else { 3047 /* 3048 * Note for BSD we hit here always other O/S's will 3049 * pass things in via the sctp_ifap argument 3050 * (Panda). 3051 */ 3052 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3053 vrf_id, SCTP_ADDR_NOT_LOCKED); 3054 } 3055 if (ifa == NULL) { 3056 /* Can't find an interface with that address */ 3057 SCTP_INP_WUNLOCK(inp); 3058 SCTP_INP_INFO_WUNLOCK(); 3059 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3060 return (EADDRNOTAVAIL); 3061 } 3062 if (addr->sa_family == AF_INET6) { 3063 /* GAK, more FIXME IFA lock? */ 3064 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3065 /* Can't bind a non-existent addr. */ 3066 SCTP_INP_WUNLOCK(inp); 3067 SCTP_INP_INFO_WUNLOCK(); 3068 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3069 return (EINVAL); 3070 } 3071 } 3072 /* we're not bound all */ 3073 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3074 /* allow bindx() to send ASCONF's for binding changes */ 3075 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3076 /* clear automatic addr changes from kernel flag */ 3077 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3078 3079 /* add this address to the endpoint list */ 3080 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3081 if (error != 0) { 3082 SCTP_INP_WUNLOCK(inp); 3083 SCTP_INP_INFO_WUNLOCK(); 3084 return (error); 3085 } 3086 inp->laddr_count++; 3087 } 3088 /* find the bucket */ 3089 if (port_reuse_active) { 3090 /* Put it into tcp 1-2-1 hash */ 3091 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport), 3092 SCTP_BASE_INFO(hashtcpmark))]; 3093 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3094 } else { 3095 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 3096 SCTP_BASE_INFO(hashmark))]; 3097 } 3098 /* put it in the bucket */ 3099 LIST_INSERT_HEAD(head, inp, sctp_hash); 3100 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3101 head, ntohs(lport), port_reuse_active); 3102 /* set in the port */ 3103 inp->sctp_lport = lport; 3104 3105 /* turn off just the unbound flag */ 3106 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3107 SCTP_INP_WUNLOCK(inp); 3108 SCTP_INP_INFO_WUNLOCK(); 3109 return (0); 3110 } 3111 3112 3113 static void 3114 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3115 { 3116 struct sctp_iterator *it, *nit; 3117 3118 /* 3119 * We enter with the only the ITERATOR_LOCK in place and a write 3120 * lock on the inp_info stuff. 3121 */ 3122 it = sctp_it_ctl.cur_it; 3123 if (it && (it->vn != curvnet)) { 3124 /* Its not looking at our VNET */ 3125 return; 3126 } 3127 if (it && (it->inp == inp)) { 3128 /* 3129 * This is tricky and we hold the iterator lock, but when it 3130 * returns and gets the lock (when we release it) the 3131 * iterator will try to operate on inp. We need to stop that 3132 * from happening. But of course the iterator has a 3133 * reference on the stcb and inp. We can mark it and it will 3134 * stop. 3135 * 3136 * If its a single iterator situation, we set the end iterator 3137 * flag. Otherwise we set the iterator to go to the next 3138 * inp. 3139 * 3140 */ 3141 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3142 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3143 } else { 3144 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3145 } 3146 } 3147 /* 3148 * Now go through and remove any single reference to our inp that 3149 * may be still pending on the list 3150 */ 3151 SCTP_IPI_ITERATOR_WQ_LOCK(); 3152 it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead); 3153 while (it) { 3154 nit = TAILQ_NEXT(it, sctp_nxt_itr); 3155 if (it->vn != curvnet) { 3156 it = nit; 3157 continue; 3158 } 3159 if (it->inp == inp) { 3160 /* This one points to me is it inp specific? */ 3161 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3162 /* Remove and free this one */ 3163 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3164 it, sctp_nxt_itr); 3165 if (it->function_atend != NULL) { 3166 (*it->function_atend) (it->pointer, it->val); 3167 } 3168 SCTP_FREE(it, SCTP_M_ITER); 3169 } else { 3170 it->inp = LIST_NEXT(it->inp, sctp_list); 3171 if (it->inp) { 3172 SCTP_INP_INCR_REF(it->inp); 3173 } 3174 } 3175 /* 3176 * When its put in the refcnt is incremented so decr 3177 * it 3178 */ 3179 SCTP_INP_DECR_REF(inp); 3180 } 3181 it = nit; 3182 } 3183 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3184 } 3185 3186 /* release sctp_inpcb unbind the port */ 3187 void 3188 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3189 { 3190 /* 3191 * Here we free a endpoint. We must find it (if it is in the Hash 3192 * table) and remove it from there. Then we must also find it in the 3193 * overall list and remove it from there. After all removals are 3194 * complete then any timer has to be stopped. Then start the actual 3195 * freeing. a) Any local lists. b) Any associations. c) The hash of 3196 * all associations. d) finally the ep itself. 3197 */ 3198 struct sctp_pcb *m; 3199 struct sctp_tcb *asoc, *nasoc; 3200 struct sctp_laddr *laddr, *nladdr; 3201 struct inpcb *ip_pcb; 3202 struct socket *so; 3203 int being_refed = 0; 3204 struct sctp_queued_to_read *sq; 3205 3206 3207 int cnt; 3208 sctp_sharedkey_t *shared_key; 3209 3210 3211 #ifdef SCTP_LOG_CLOSING 3212 sctp_log_closing(inp, NULL, 0); 3213 #endif 3214 SCTP_ITERATOR_LOCK(); 3215 /* mark any iterators on the list or being processed */ 3216 sctp_iterator_inp_being_freed(inp); 3217 SCTP_ITERATOR_UNLOCK(); 3218 so = inp->sctp_socket; 3219 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3220 /* been here before.. eeks.. get out of here */ 3221 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3222 #ifdef SCTP_LOG_CLOSING 3223 sctp_log_closing(inp, NULL, 1); 3224 #endif 3225 return; 3226 } 3227 SCTP_ASOC_CREATE_LOCK(inp); 3228 SCTP_INP_INFO_WLOCK(); 3229 3230 SCTP_INP_WLOCK(inp); 3231 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3232 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3233 /* socket is gone, so no more wakeups allowed */ 3234 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3235 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3236 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3237 3238 } 3239 /* First time through we have the socket lock, after that no more. */ 3240 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3241 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3242 3243 if (inp->control) { 3244 sctp_m_freem(inp->control); 3245 inp->control = NULL; 3246 } 3247 if (inp->pkt) { 3248 sctp_m_freem(inp->pkt); 3249 inp->pkt = NULL; 3250 } 3251 m = &inp->sctp_ep; 3252 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3253 * here but I will be nice :> (i.e. 3254 * ip_pcb = ep;) */ 3255 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3256 int cnt_in_sd; 3257 3258 cnt_in_sd = 0; 3259 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 3260 asoc = nasoc) { 3261 SCTP_TCB_LOCK(asoc); 3262 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3263 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3264 /* Skip guys being freed */ 3265 cnt_in_sd++; 3266 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3267 /* 3268 * Special case - we did not start a 3269 * kill timer on the asoc due to it 3270 * was not closed. So go ahead and 3271 * start it now. 3272 */ 3273 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3274 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3275 } 3276 SCTP_TCB_UNLOCK(asoc); 3277 continue; 3278 } 3279 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3280 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3281 (asoc->asoc.total_output_queue_size == 0)) { 3282 /* 3283 * If we have data in queue, we don't want 3284 * to just free since the app may have done, 3285 * send()/close or connect/send/close. And 3286 * it wants the data to get across first. 3287 */ 3288 /* Just abandon things in the front states */ 3289 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3290 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3291 cnt_in_sd++; 3292 } 3293 continue; 3294 } 3295 /* Disconnect the socket please */ 3296 asoc->sctp_socket = NULL; 3297 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3298 if ((asoc->asoc.size_on_reasm_queue > 0) || 3299 (asoc->asoc.control_pdapi) || 3300 (asoc->asoc.size_on_all_streams > 0) || 3301 (so && (so->so_rcv.sb_cc > 0)) 3302 ) { 3303 /* Left with Data unread */ 3304 struct mbuf *op_err; 3305 3306 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3307 0, M_DONTWAIT, 1, MT_DATA); 3308 if (op_err) { 3309 /* Fill in the user initiated abort */ 3310 struct sctp_paramhdr *ph; 3311 uint32_t *ippp; 3312 3313 SCTP_BUF_LEN(op_err) = 3314 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3315 ph = mtod(op_err, 3316 struct sctp_paramhdr *); 3317 ph->param_type = htons( 3318 SCTP_CAUSE_USER_INITIATED_ABT); 3319 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3320 ippp = (uint32_t *) (ph + 1); 3321 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3322 } 3323 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3324 #if defined(SCTP_PANIC_ON_ABORT) 3325 panic("inpcb_free does an abort"); 3326 #endif 3327 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3328 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3329 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3330 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3331 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3332 } 3333 if (sctp_free_assoc(inp, asoc, 3334 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3335 cnt_in_sd++; 3336 } 3337 continue; 3338 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3339 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3340 (asoc->asoc.stream_queue_cnt == 0) 3341 ) { 3342 if (asoc->asoc.locked_on_sending) { 3343 goto abort_anyway; 3344 } 3345 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3346 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3347 /* 3348 * there is nothing queued to send, 3349 * so I send shutdown 3350 */ 3351 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 3352 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3353 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3354 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3355 } 3356 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3357 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3358 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3359 asoc->asoc.primary_destination); 3360 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3361 asoc->asoc.primary_destination); 3362 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3363 } 3364 } else { 3365 /* mark into shutdown pending */ 3366 struct sctp_stream_queue_pending *sp; 3367 3368 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3369 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3370 asoc->asoc.primary_destination); 3371 if (asoc->asoc.locked_on_sending) { 3372 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3373 sctp_streamhead); 3374 if (sp == NULL) { 3375 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3376 asoc->asoc.locked_on_sending, 3377 asoc->asoc.locked_on_sending->stream_no); 3378 } else { 3379 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3380 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3381 } 3382 } 3383 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3384 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3385 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3386 struct mbuf *op_err; 3387 3388 abort_anyway: 3389 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3390 0, M_DONTWAIT, 1, MT_DATA); 3391 if (op_err) { 3392 /* 3393 * Fill in the user 3394 * initiated abort 3395 */ 3396 struct sctp_paramhdr *ph; 3397 uint32_t *ippp; 3398 3399 SCTP_BUF_LEN(op_err) = 3400 (sizeof(struct sctp_paramhdr) + 3401 sizeof(uint32_t)); 3402 ph = mtod(op_err, 3403 struct sctp_paramhdr *); 3404 ph->param_type = htons( 3405 SCTP_CAUSE_USER_INITIATED_ABT); 3406 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3407 ippp = (uint32_t *) (ph + 1); 3408 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3409 } 3410 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3411 #if defined(SCTP_PANIC_ON_ABORT) 3412 panic("inpcb_free does an abort"); 3413 #endif 3414 3415 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3416 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3417 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3418 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3419 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3420 } 3421 if (sctp_free_assoc(inp, asoc, 3422 SCTP_PCBFREE_NOFORCE, 3423 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3424 cnt_in_sd++; 3425 } 3426 continue; 3427 } else { 3428 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3429 } 3430 } 3431 cnt_in_sd++; 3432 SCTP_TCB_UNLOCK(asoc); 3433 } 3434 /* now is there some left in our SHUTDOWN state? */ 3435 if (cnt_in_sd) { 3436 #ifdef SCTP_LOG_CLOSING 3437 sctp_log_closing(inp, NULL, 2); 3438 #endif 3439 inp->sctp_socket = NULL; 3440 SCTP_INP_WUNLOCK(inp); 3441 SCTP_ASOC_CREATE_UNLOCK(inp); 3442 SCTP_INP_INFO_WUNLOCK(); 3443 return; 3444 } 3445 } 3446 inp->sctp_socket = NULL; 3447 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3448 SCTP_PCB_FLAGS_UNBOUND) { 3449 /* 3450 * ok, this guy has been bound. It's port is somewhere in 3451 * the SCTP_BASE_INFO(hash table). Remove it! 3452 */ 3453 LIST_REMOVE(inp, sctp_hash); 3454 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3455 } 3456 /* 3457 * If there is a timer running to kill us, forget it, since it may 3458 * have a contest on the INP lock.. which would cause us to die ... 3459 */ 3460 cnt = 0; 3461 for ((asoc = LIST_FIRST(&inp->sctp_asoc_list)); asoc != NULL; 3462 asoc = nasoc) { 3463 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3464 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3465 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3466 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3467 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3468 } 3469 cnt++; 3470 continue; 3471 } 3472 /* Free associations that are NOT killing us */ 3473 SCTP_TCB_LOCK(asoc); 3474 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3475 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3476 struct mbuf *op_err; 3477 uint32_t *ippp; 3478 3479 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3480 0, M_DONTWAIT, 1, MT_DATA); 3481 if (op_err) { 3482 /* Fill in the user initiated abort */ 3483 struct sctp_paramhdr *ph; 3484 3485 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3486 sizeof(uint32_t)); 3487 ph = mtod(op_err, struct sctp_paramhdr *); 3488 ph->param_type = htons( 3489 SCTP_CAUSE_USER_INITIATED_ABT); 3490 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3491 ippp = (uint32_t *) (ph + 1); 3492 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3493 3494 } 3495 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3496 #if defined(SCTP_PANIC_ON_ABORT) 3497 panic("inpcb_free does an abort"); 3498 #endif 3499 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3500 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3501 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3502 cnt++; 3503 SCTP_TCB_UNLOCK(asoc); 3504 continue; 3505 } 3506 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3507 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3508 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3509 } 3510 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3511 cnt++; 3512 } 3513 } 3514 if (cnt) { 3515 /* Ok we have someone out there that will kill us */ 3516 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3517 #ifdef SCTP_LOG_CLOSING 3518 sctp_log_closing(inp, NULL, 3); 3519 #endif 3520 SCTP_INP_WUNLOCK(inp); 3521 SCTP_ASOC_CREATE_UNLOCK(inp); 3522 SCTP_INP_INFO_WUNLOCK(); 3523 return; 3524 } 3525 if (SCTP_INP_LOCK_CONTENDED(inp)) 3526 being_refed++; 3527 if (SCTP_INP_READ_CONTENDED(inp)) 3528 being_refed++; 3529 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3530 being_refed++; 3531 3532 if ((inp->refcount) || 3533 (being_refed) || 3534 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3535 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3536 #ifdef SCTP_LOG_CLOSING 3537 sctp_log_closing(inp, NULL, 4); 3538 #endif 3539 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3540 SCTP_INP_WUNLOCK(inp); 3541 SCTP_ASOC_CREATE_UNLOCK(inp); 3542 SCTP_INP_INFO_WUNLOCK(); 3543 return; 3544 } 3545 inp->sctp_ep.signature_change.type = 0; 3546 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3547 /* 3548 * Remove it from the list .. last thing we need a lock for. 3549 */ 3550 LIST_REMOVE(inp, sctp_list); 3551 SCTP_INP_WUNLOCK(inp); 3552 SCTP_ASOC_CREATE_UNLOCK(inp); 3553 SCTP_INP_INFO_WUNLOCK(); 3554 /* 3555 * Now we release all locks. Since this INP cannot be found anymore 3556 * except possbily by the kill timer that might be running. We call 3557 * the drain function here. It should hit the case were it sees the 3558 * ACTIVE flag cleared and exit out freeing us to proceed and 3559 * destroy everything. 3560 */ 3561 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3562 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3563 } else { 3564 /* Probably un-needed */ 3565 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3566 } 3567 3568 #ifdef SCTP_LOG_CLOSING 3569 sctp_log_closing(inp, NULL, 5); 3570 #endif 3571 3572 3573 if ((inp->sctp_asocidhash) != NULL) { 3574 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3575 inp->sctp_asocidhash = NULL; 3576 } 3577 /* sa_ignore FREED_MEMORY */ 3578 while ((sq = TAILQ_FIRST(&inp->read_queue)) != NULL) { 3579 /* Its only abandoned if it had data left */ 3580 if (sq->length) 3581 SCTP_STAT_INCR(sctps_left_abandon); 3582 3583 TAILQ_REMOVE(&inp->read_queue, sq, next); 3584 sctp_free_remote_addr(sq->whoFrom); 3585 if (so) 3586 so->so_rcv.sb_cc -= sq->length; 3587 if (sq->data) { 3588 sctp_m_freem(sq->data); 3589 sq->data = NULL; 3590 } 3591 /* 3592 * no need to free the net count, since at this point all 3593 * assoc's are gone. 3594 */ 3595 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3596 SCTP_DECR_READQ_COUNT(); 3597 } 3598 /* Now the sctp_pcb things */ 3599 /* 3600 * free each asoc if it is not already closed/free. we can't use the 3601 * macro here since le_next will get freed as part of the 3602 * sctp_free_assoc() call. 3603 */ 3604 cnt = 0; 3605 if (so) { 3606 #ifdef IPSEC 3607 ipsec_delete_pcbpolicy(ip_pcb); 3608 #endif /* IPSEC */ 3609 3610 /* Unlocks not needed since the socket is gone now */ 3611 } 3612 if (ip_pcb->inp_options) { 3613 (void)sctp_m_free(ip_pcb->inp_options); 3614 ip_pcb->inp_options = 0; 3615 } 3616 if (ip_pcb->inp_moptions) { 3617 inp_freemoptions(ip_pcb->inp_moptions); 3618 ip_pcb->inp_moptions = 0; 3619 } 3620 #ifdef INET6 3621 if (ip_pcb->inp_vflag & INP_IPV6) { 3622 struct in6pcb *in6p; 3623 3624 in6p = (struct in6pcb *)inp; 3625 ip6_freepcbopts(in6p->in6p_outputopts); 3626 } 3627 #endif /* INET6 */ 3628 ip_pcb->inp_vflag = 0; 3629 /* free up authentication fields */ 3630 if (inp->sctp_ep.local_auth_chunks != NULL) 3631 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3632 if (inp->sctp_ep.local_hmacs != NULL) 3633 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3634 3635 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 3636 while (shared_key) { 3637 LIST_REMOVE(shared_key, next); 3638 sctp_free_sharedkey(shared_key); 3639 /* sa_ignore FREED_MEMORY */ 3640 shared_key = LIST_FIRST(&inp->sctp_ep.shared_keys); 3641 } 3642 3643 /* 3644 * if we have an address list the following will free the list of 3645 * ifaddr's that are set into this ep. Again macro limitations here, 3646 * since the LIST_FOREACH could be a bad idea. 3647 */ 3648 for ((laddr = LIST_FIRST(&inp->sctp_addr_list)); laddr != NULL; 3649 laddr = nladdr) { 3650 nladdr = LIST_NEXT(laddr, sctp_nxt_addr); 3651 sctp_remove_laddr(laddr); 3652 } 3653 3654 #ifdef SCTP_TRACK_FREED_ASOCS 3655 /* TEMP CODE */ 3656 for ((asoc = LIST_FIRST(&inp->sctp_asoc_free_list)); asoc != NULL; 3657 asoc = nasoc) { 3658 nasoc = LIST_NEXT(asoc, sctp_tcblist); 3659 LIST_REMOVE(asoc, sctp_tcblist); 3660 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3661 SCTP_DECR_ASOC_COUNT(); 3662 } 3663 /* *** END TEMP CODE *** */ 3664 #endif 3665 /* Now lets see about freeing the EP hash table. */ 3666 if (inp->sctp_tcbhash != NULL) { 3667 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3668 inp->sctp_tcbhash = NULL; 3669 } 3670 /* Now we must put the ep memory back into the zone pool */ 3671 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3672 SCTP_INP_LOCK_DESTROY(inp); 3673 SCTP_INP_READ_DESTROY(inp); 3674 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3675 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3676 SCTP_DECR_EP_COUNT(); 3677 } 3678 3679 3680 struct sctp_nets * 3681 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3682 { 3683 struct sctp_nets *net; 3684 3685 /* locate the address */ 3686 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3687 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3688 return (net); 3689 } 3690 return (NULL); 3691 } 3692 3693 3694 int 3695 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3696 { 3697 struct sctp_ifa *sctp_ifa; 3698 3699 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3700 if (sctp_ifa) { 3701 return (1); 3702 } else { 3703 return (0); 3704 } 3705 } 3706 3707 /* 3708 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3709 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3710 * stats of stuff. 3711 */ 3712 int 3713 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3714 int set_scope, int from) 3715 { 3716 /* 3717 * The following is redundant to the same lines in the 3718 * sctp_aloc_assoc() but is needed since other's call the add 3719 * address function 3720 */ 3721 struct sctp_nets *net, *netfirst; 3722 int addr_inscope; 3723 3724 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3725 from); 3726 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3727 3728 netfirst = sctp_findnet(stcb, newaddr); 3729 if (netfirst) { 3730 /* 3731 * Lie and return ok, we don't want to make the association 3732 * go away for this behavior. It will happen in the TCP 3733 * model in a connected socket. It does not reach the hash 3734 * table until after the association is built so it can't be 3735 * found. Mark as reachable, since the initial creation will 3736 * have been cleared and the NOT_IN_ASSOC flag will have 3737 * been added... and we don't want to end up removing it 3738 * back out. 3739 */ 3740 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3741 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3742 SCTP_ADDR_UNCONFIRMED); 3743 } else { 3744 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3745 } 3746 3747 return (0); 3748 } 3749 addr_inscope = 1; 3750 if (newaddr->sa_family == AF_INET) { 3751 struct sockaddr_in *sin; 3752 3753 sin = (struct sockaddr_in *)newaddr; 3754 if (sin->sin_addr.s_addr == 0) { 3755 /* Invalid address */ 3756 return (-1); 3757 } 3758 /* zero out the bzero area */ 3759 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3760 3761 /* assure len is set */ 3762 sin->sin_len = sizeof(struct sockaddr_in); 3763 if (set_scope) { 3764 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3765 stcb->ipv4_local_scope = 1; 3766 #else 3767 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3768 stcb->asoc.ipv4_local_scope = 1; 3769 } 3770 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3771 } else { 3772 /* Validate the address is in scope */ 3773 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3774 (stcb->asoc.ipv4_local_scope == 0)) { 3775 addr_inscope = 0; 3776 } 3777 } 3778 #ifdef INET6 3779 } else if (newaddr->sa_family == AF_INET6) { 3780 struct sockaddr_in6 *sin6; 3781 3782 sin6 = (struct sockaddr_in6 *)newaddr; 3783 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3784 /* Invalid address */ 3785 return (-1); 3786 } 3787 /* assure len is set */ 3788 sin6->sin6_len = sizeof(struct sockaddr_in6); 3789 if (set_scope) { 3790 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3791 stcb->asoc.loopback_scope = 1; 3792 stcb->asoc.local_scope = 0; 3793 stcb->asoc.ipv4_local_scope = 1; 3794 stcb->asoc.site_scope = 1; 3795 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3796 /* 3797 * If the new destination is a LINK_LOCAL we 3798 * must have common site scope. Don't set 3799 * the local scope since we may not share 3800 * all links, only loopback can do this. 3801 * Links on the local network would also be 3802 * on our private network for v4 too. 3803 */ 3804 stcb->asoc.ipv4_local_scope = 1; 3805 stcb->asoc.site_scope = 1; 3806 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3807 /* 3808 * If the new destination is SITE_LOCAL then 3809 * we must have site scope in common. 3810 */ 3811 stcb->asoc.site_scope = 1; 3812 } 3813 } else { 3814 /* Validate the address is in scope */ 3815 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3816 (stcb->asoc.loopback_scope == 0)) { 3817 addr_inscope = 0; 3818 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3819 (stcb->asoc.local_scope == 0)) { 3820 addr_inscope = 0; 3821 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3822 (stcb->asoc.site_scope == 0)) { 3823 addr_inscope = 0; 3824 } 3825 } 3826 #endif 3827 } else { 3828 /* not supported family type */ 3829 return (-1); 3830 } 3831 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3832 if (net == NULL) { 3833 return (-1); 3834 } 3835 SCTP_INCR_RADDR_COUNT(); 3836 bzero(net, sizeof(*net)); 3837 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3838 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3839 if (newaddr->sa_family == AF_INET) { 3840 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3841 } else if (newaddr->sa_family == AF_INET6) { 3842 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3843 } 3844 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3845 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3846 stcb->asoc.loopback_scope = 1; 3847 stcb->asoc.ipv4_local_scope = 1; 3848 stcb->asoc.local_scope = 0; 3849 stcb->asoc.site_scope = 1; 3850 addr_inscope = 1; 3851 } 3852 net->failure_threshold = stcb->asoc.def_net_failure; 3853 if (addr_inscope == 0) { 3854 net->dest_state = (SCTP_ADDR_REACHABLE | 3855 SCTP_ADDR_OUT_OF_SCOPE); 3856 } else { 3857 if (from == SCTP_ADDR_IS_CONFIRMED) 3858 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3859 net->dest_state = SCTP_ADDR_REACHABLE; 3860 else 3861 net->dest_state = SCTP_ADDR_REACHABLE | 3862 SCTP_ADDR_UNCONFIRMED; 3863 } 3864 /* 3865 * We set this to 0, the timer code knows that this means its an 3866 * initial value 3867 */ 3868 net->RTO = 0; 3869 net->RTO_measured = 0; 3870 stcb->asoc.numnets++; 3871 *(&net->ref_count) = 1; 3872 net->tos_flowlabel = 0; 3873 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 3874 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 3875 } else { 3876 net->port = 0; 3877 } 3878 #ifdef INET 3879 if (newaddr->sa_family == AF_INET) 3880 net->tos_flowlabel = stcb->asoc.default_tos; 3881 #endif 3882 #ifdef INET6 3883 if (newaddr->sa_family == AF_INET6) 3884 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3885 #endif 3886 /* Init the timer structure */ 3887 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3888 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3889 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3890 3891 /* Now generate a route for this guy */ 3892 #ifdef INET6 3893 /* KAME hack: embed scopeid */ 3894 if (newaddr->sa_family == AF_INET6) { 3895 struct sockaddr_in6 *sin6; 3896 3897 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3898 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3899 sin6->sin6_scope_id = 0; 3900 } 3901 #endif 3902 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3903 3904 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3905 /* Get source address */ 3906 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3907 stcb, 3908 (sctp_route_t *) & net->ro, 3909 net, 3910 0, 3911 stcb->asoc.vrf_id); 3912 /* Now get the interface MTU */ 3913 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3914 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3915 } else { 3916 net->mtu = 0; 3917 } 3918 #ifdef SCTP_PRINT_FOR_B_AND_M 3919 SCTP_PRINTF("We have found an interface mtu of %d\n", net->mtu); 3920 #endif 3921 if (net->mtu == 0) { 3922 /* Huh ?? */ 3923 net->mtu = SCTP_DEFAULT_MTU; 3924 } else { 3925 uint32_t rmtu; 3926 3927 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3928 #ifdef SCTP_PRINT_FOR_B_AND_M 3929 SCTP_PRINTF("The route mtu is %d\n", rmtu); 3930 #endif 3931 if (rmtu == 0) { 3932 /* 3933 * Start things off to match mtu of 3934 * interface please. 3935 */ 3936 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3937 net->ro.ro_rt, net->mtu); 3938 } else { 3939 /* 3940 * we take the route mtu over the interface, 3941 * since the route may be leading out the 3942 * loopback, or a different interface. 3943 */ 3944 net->mtu = rmtu; 3945 } 3946 } 3947 if (from == SCTP_ALLOC_ASOC) { 3948 #ifdef SCTP_PRINT_FOR_B_AND_M 3949 SCTP_PRINTF("New assoc sets mtu to :%d\n", net->mtu); 3950 #endif 3951 stcb->asoc.smallest_mtu = net->mtu; 3952 } 3953 } else { 3954 net->mtu = stcb->asoc.smallest_mtu; 3955 } 3956 #ifdef INET6 3957 if (newaddr->sa_family == AF_INET6) { 3958 struct sockaddr_in6 *sin6; 3959 3960 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3961 (void)sa6_recoverscope(sin6); 3962 } 3963 #endif 3964 if (net->port) { 3965 net->mtu -= sizeof(struct udphdr); 3966 } 3967 if (stcb->asoc.smallest_mtu > net->mtu) { 3968 #ifdef SCTP_PRINT_FOR_B_AND_M 3969 SCTP_PRINTF("new address mtu:%d smaller than smallest:%d\n", 3970 net->mtu, stcb->asoc.smallest_mtu); 3971 #endif 3972 stcb->asoc.smallest_mtu = net->mtu; 3973 } 3974 /* JRS - Use the congestion control given in the CC module */ 3975 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 3976 3977 /* 3978 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3979 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3980 */ 3981 net->find_pseudo_cumack = 1; 3982 net->find_rtx_pseudo_cumack = 1; 3983 net->src_addr_selected = 0; 3984 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3985 if (net->ro.ro_rt == NULL) { 3986 /* Since we have no route put it at the back */ 3987 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3988 } else if (netfirst == NULL) { 3989 /* We are the first one in the pool. */ 3990 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3991 } else if (netfirst->ro.ro_rt == NULL) { 3992 /* 3993 * First one has NO route. Place this one ahead of the first 3994 * one. 3995 */ 3996 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3997 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3998 /* 3999 * This one has a different interface than the one at the 4000 * top of the list. Place it ahead. 4001 */ 4002 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4003 } else { 4004 /* 4005 * Ok we have the same interface as the first one. Move 4006 * forward until we find either a) one with a NULL route... 4007 * insert ahead of that b) one with a different ifp.. insert 4008 * after that. c) end of the list.. insert at the tail. 4009 */ 4010 struct sctp_nets *netlook; 4011 4012 do { 4013 netlook = TAILQ_NEXT(netfirst, sctp_next); 4014 if (netlook == NULL) { 4015 /* End of the list */ 4016 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4017 break; 4018 } else if (netlook->ro.ro_rt == NULL) { 4019 /* next one has NO route */ 4020 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4021 break; 4022 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4023 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4024 net, sctp_next); 4025 break; 4026 } 4027 /* Shift forward */ 4028 netfirst = netlook; 4029 } while (netlook != NULL); 4030 } 4031 4032 /* got to have a primary set */ 4033 if (stcb->asoc.primary_destination == 0) { 4034 stcb->asoc.primary_destination = net; 4035 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4036 (net->ro.ro_rt) && 4037 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4038 /* No route to current primary adopt new primary */ 4039 stcb->asoc.primary_destination = net; 4040 } 4041 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 4042 net); 4043 /* Validate primary is first */ 4044 net = TAILQ_FIRST(&stcb->asoc.nets); 4045 if ((net != stcb->asoc.primary_destination) && 4046 (stcb->asoc.primary_destination)) { 4047 /* 4048 * first one on the list is NOT the primary sctp_cmpaddr() 4049 * is much more efficent if the primary is the first on the 4050 * list, make it so. 4051 */ 4052 TAILQ_REMOVE(&stcb->asoc.nets, 4053 stcb->asoc.primary_destination, sctp_next); 4054 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4055 stcb->asoc.primary_destination, sctp_next); 4056 } 4057 return (0); 4058 } 4059 4060 4061 static uint32_t 4062 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4063 { 4064 uint32_t id; 4065 struct sctpasochead *head; 4066 struct sctp_tcb *lstcb; 4067 4068 SCTP_INP_WLOCK(inp); 4069 try_again: 4070 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4071 /* TSNH */ 4072 SCTP_INP_WUNLOCK(inp); 4073 return (0); 4074 } 4075 /* 4076 * We don't allow assoc id to be 0, this is needed otherwise if the 4077 * id were to wrap we would have issues with some socket options. 4078 */ 4079 if (inp->sctp_associd_counter == 0) { 4080 inp->sctp_associd_counter++; 4081 } 4082 id = inp->sctp_associd_counter; 4083 inp->sctp_associd_counter++; 4084 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4085 if (lstcb) { 4086 goto try_again; 4087 } 4088 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4089 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4090 stcb->asoc.in_asocid_hash = 1; 4091 SCTP_INP_WUNLOCK(inp); 4092 return id; 4093 } 4094 4095 /* 4096 * allocate an association and add it to the endpoint. The caller must be 4097 * careful to add all additional addresses once they are know right away or 4098 * else the assoc will be may experience a blackout scenario. 4099 */ 4100 struct sctp_tcb * 4101 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4102 int *error, uint32_t override_tag, uint32_t vrf_id, 4103 struct thread *p 4104 ) 4105 { 4106 /* note the p argument is only valid in unbound sockets */ 4107 4108 struct sctp_tcb *stcb; 4109 struct sctp_association *asoc; 4110 struct sctpasochead *head; 4111 uint16_t rport; 4112 int err; 4113 4114 /* 4115 * Assumption made here: Caller has done a 4116 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4117 * address does not exist already. 4118 */ 4119 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4120 /* Hit max assoc, sorry no more */ 4121 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4122 *error = ENOBUFS; 4123 return (NULL); 4124 } 4125 if (firstaddr == NULL) { 4126 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4127 *error = EINVAL; 4128 return (NULL); 4129 } 4130 SCTP_INP_RLOCK(inp); 4131 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4132 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4133 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4134 /* 4135 * If its in the TCP pool, its NOT allowed to create an 4136 * association. The parent listener needs to call 4137 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4138 * off, or connected one does this.. its an error. 4139 */ 4140 SCTP_INP_RUNLOCK(inp); 4141 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4142 *error = EINVAL; 4143 return (NULL); 4144 } 4145 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4146 #ifdef SCTP_DEBUG 4147 if (firstaddr) { 4148 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4149 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4150 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4151 } else { 4152 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4153 } 4154 #endif /* SCTP_DEBUG */ 4155 if (firstaddr->sa_family == AF_INET) { 4156 struct sockaddr_in *sin; 4157 4158 sin = (struct sockaddr_in *)firstaddr; 4159 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 4160 /* Invalid address */ 4161 SCTP_INP_RUNLOCK(inp); 4162 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4163 *error = EINVAL; 4164 return (NULL); 4165 } 4166 rport = sin->sin_port; 4167 } else if (firstaddr->sa_family == AF_INET6) { 4168 struct sockaddr_in6 *sin6; 4169 4170 sin6 = (struct sockaddr_in6 *)firstaddr; 4171 if ((sin6->sin6_port == 0) || 4172 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 4173 /* Invalid address */ 4174 SCTP_INP_RUNLOCK(inp); 4175 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4176 *error = EINVAL; 4177 return (NULL); 4178 } 4179 rport = sin6->sin6_port; 4180 } else { 4181 /* not supported family type */ 4182 SCTP_INP_RUNLOCK(inp); 4183 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4184 *error = EINVAL; 4185 return (NULL); 4186 } 4187 SCTP_INP_RUNLOCK(inp); 4188 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4189 /* 4190 * If you have not performed a bind, then we need to do the 4191 * ephemerial bind for you. 4192 */ 4193 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4194 (struct sockaddr *)NULL, 4195 (struct sctp_ifa *)NULL, 4196 p 4197 ))) { 4198 /* bind error, probably perm */ 4199 *error = err; 4200 return (NULL); 4201 } 4202 } 4203 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4204 if (stcb == NULL) { 4205 /* out of memory? */ 4206 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4207 *error = ENOMEM; 4208 return (NULL); 4209 } 4210 SCTP_INCR_ASOC_COUNT(); 4211 4212 bzero(stcb, sizeof(*stcb)); 4213 asoc = &stcb->asoc; 4214 4215 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4216 SCTP_TCB_LOCK_INIT(stcb); 4217 SCTP_TCB_SEND_LOCK_INIT(stcb); 4218 stcb->rport = rport; 4219 /* setup back pointer's */ 4220 stcb->sctp_ep = inp; 4221 stcb->sctp_socket = inp->sctp_socket; 4222 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4223 /* failed */ 4224 SCTP_TCB_LOCK_DESTROY(stcb); 4225 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4226 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4227 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4228 SCTP_DECR_ASOC_COUNT(); 4229 *error = err; 4230 return (NULL); 4231 } 4232 /* and the port */ 4233 SCTP_INP_INFO_WLOCK(); 4234 SCTP_INP_WLOCK(inp); 4235 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4236 /* inpcb freed while alloc going on */ 4237 SCTP_TCB_LOCK_DESTROY(stcb); 4238 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4239 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4240 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4241 SCTP_INP_WUNLOCK(inp); 4242 SCTP_INP_INFO_WUNLOCK(); 4243 SCTP_DECR_ASOC_COUNT(); 4244 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4245 *error = EINVAL; 4246 return (NULL); 4247 } 4248 SCTP_TCB_LOCK(stcb); 4249 4250 /* now that my_vtag is set, add it to the hash */ 4251 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4252 /* put it in the bucket in the vtag hash of assoc's for the system */ 4253 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4254 SCTP_INP_INFO_WUNLOCK(); 4255 4256 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4257 /* failure.. memory error? */ 4258 if (asoc->strmout) { 4259 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4260 asoc->strmout = NULL; 4261 } 4262 if (asoc->mapping_array) { 4263 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4264 asoc->mapping_array = NULL; 4265 } 4266 if (asoc->nr_mapping_array) { 4267 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4268 asoc->nr_mapping_array = NULL; 4269 } 4270 SCTP_DECR_ASOC_COUNT(); 4271 SCTP_TCB_LOCK_DESTROY(stcb); 4272 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4273 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4274 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4275 SCTP_INP_WUNLOCK(inp); 4276 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4277 *error = ENOBUFS; 4278 return (NULL); 4279 } 4280 /* Init all the timers */ 4281 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 4282 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4283 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4284 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4285 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4286 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4287 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4288 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4289 4290 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4291 /* now file the port under the hash as well */ 4292 if (inp->sctp_tcbhash != NULL) { 4293 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4294 inp->sctp_hashmark)]; 4295 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4296 } 4297 SCTP_INP_WUNLOCK(inp); 4298 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4299 return (stcb); 4300 } 4301 4302 4303 void 4304 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4305 { 4306 struct sctp_association *asoc; 4307 4308 asoc = &stcb->asoc; 4309 asoc->numnets--; 4310 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4311 if (net == asoc->primary_destination) { 4312 /* Reset primary */ 4313 struct sctp_nets *lnet; 4314 4315 lnet = TAILQ_FIRST(&asoc->nets); 4316 /* 4317 * Mobility adaptation Ideally, if deleted destination is 4318 * the primary, it becomes a fast retransmission trigger by 4319 * the subsequent SET PRIMARY. (by micchie) 4320 */ 4321 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4322 SCTP_MOBILITY_BASE) || 4323 sctp_is_mobility_feature_on(stcb->sctp_ep, 4324 SCTP_MOBILITY_FASTHANDOFF)) { 4325 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4326 if (asoc->deleted_primary != NULL) { 4327 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4328 goto out; 4329 } 4330 asoc->deleted_primary = net; 4331 atomic_add_int(&net->ref_count, 1); 4332 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4333 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4334 sctp_mobility_feature_on(stcb->sctp_ep, 4335 SCTP_MOBILITY_PRIM_DELETED); 4336 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4337 stcb->sctp_ep, stcb, NULL); 4338 } 4339 out: 4340 /* Try to find a confirmed primary */ 4341 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4342 } 4343 if (net == asoc->last_data_chunk_from) { 4344 /* Reset primary */ 4345 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4346 } 4347 if (net == asoc->last_control_chunk_from) { 4348 /* Clear net */ 4349 asoc->last_control_chunk_from = NULL; 4350 } 4351 sctp_free_remote_addr(net); 4352 } 4353 4354 /* 4355 * remove a remote endpoint address from an association, it will fail if the 4356 * address does not exist. 4357 */ 4358 int 4359 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4360 { 4361 /* 4362 * Here we need to remove a remote address. This is quite simple, we 4363 * first find it in the list of address for the association 4364 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4365 * on that item. Note we do not allow it to be removed if there are 4366 * no other addresses. 4367 */ 4368 struct sctp_association *asoc; 4369 struct sctp_nets *net, *net_tmp; 4370 4371 asoc = &stcb->asoc; 4372 4373 /* locate the address */ 4374 for (net = TAILQ_FIRST(&asoc->nets); net != NULL; net = net_tmp) { 4375 net_tmp = TAILQ_NEXT(net, sctp_next); 4376 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4377 continue; 4378 } 4379 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4380 remaddr)) { 4381 /* we found the guy */ 4382 if (asoc->numnets < 2) { 4383 /* Must have at LEAST two remote addresses */ 4384 return (-1); 4385 } else { 4386 sctp_remove_net(stcb, net); 4387 return (0); 4388 } 4389 } 4390 } 4391 /* not found. */ 4392 return (-2); 4393 } 4394 4395 void 4396 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4397 { 4398 struct sctpvtaghead *chain; 4399 struct sctp_tagblock *twait_block; 4400 int found = 0; 4401 int i; 4402 4403 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4404 if (!LIST_EMPTY(chain)) { 4405 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4406 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4407 if ((twait_block->vtag_block[i].v_tag == tag) && 4408 (twait_block->vtag_block[i].lport == lport) && 4409 (twait_block->vtag_block[i].rport == rport)) { 4410 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4411 twait_block->vtag_block[i].v_tag = 0; 4412 twait_block->vtag_block[i].lport = 0; 4413 twait_block->vtag_block[i].rport = 0; 4414 found = 1; 4415 break; 4416 } 4417 } 4418 if (found) 4419 break; 4420 } 4421 } 4422 } 4423 4424 int 4425 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4426 { 4427 struct sctpvtaghead *chain; 4428 struct sctp_tagblock *twait_block; 4429 int found = 0; 4430 int i; 4431 4432 SCTP_INP_INFO_WLOCK(); 4433 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4434 if (!LIST_EMPTY(chain)) { 4435 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4436 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4437 if ((twait_block->vtag_block[i].v_tag == tag) && 4438 (twait_block->vtag_block[i].lport == lport) && 4439 (twait_block->vtag_block[i].rport == rport)) { 4440 found = 1; 4441 break; 4442 } 4443 } 4444 if (found) 4445 break; 4446 } 4447 } 4448 SCTP_INP_INFO_WUNLOCK(); 4449 return (found); 4450 } 4451 4452 4453 void 4454 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4455 { 4456 struct sctpvtaghead *chain; 4457 struct sctp_tagblock *twait_block; 4458 struct timeval now; 4459 int set, i; 4460 4461 if (time == 0) { 4462 /* Its disabled */ 4463 return; 4464 } 4465 (void)SCTP_GETTIME_TIMEVAL(&now); 4466 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4467 set = 0; 4468 if (!LIST_EMPTY(chain)) { 4469 /* Block(s) present, lets find space, and expire on the fly */ 4470 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4471 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4472 if ((twait_block->vtag_block[i].v_tag == 0) && 4473 !set) { 4474 twait_block->vtag_block[i].tv_sec_at_expire = 4475 now.tv_sec + time; 4476 twait_block->vtag_block[i].v_tag = tag; 4477 twait_block->vtag_block[i].lport = lport; 4478 twait_block->vtag_block[i].rport = rport; 4479 set = 1; 4480 } else if ((twait_block->vtag_block[i].v_tag) && 4481 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4482 /* Audit expires this guy */ 4483 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4484 twait_block->vtag_block[i].v_tag = 0; 4485 twait_block->vtag_block[i].lport = 0; 4486 twait_block->vtag_block[i].rport = 0; 4487 if (set == 0) { 4488 /* Reuse it for my new tag */ 4489 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4490 twait_block->vtag_block[i].v_tag = tag; 4491 twait_block->vtag_block[i].lport = lport; 4492 twait_block->vtag_block[i].rport = rport; 4493 set = 1; 4494 } 4495 } 4496 } 4497 if (set) { 4498 /* 4499 * We only do up to the block where we can 4500 * place our tag for audits 4501 */ 4502 break; 4503 } 4504 } 4505 } 4506 /* Need to add a new block to chain */ 4507 if (!set) { 4508 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4509 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4510 if (twait_block == NULL) { 4511 #ifdef INVARIANTS 4512 panic("Can not alloc tagblock"); 4513 #endif 4514 return; 4515 } 4516 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4517 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4518 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4519 twait_block->vtag_block[0].v_tag = tag; 4520 twait_block->vtag_block[0].lport = lport; 4521 twait_block->vtag_block[0].rport = rport; 4522 } 4523 } 4524 4525 4526 4527 /*- 4528 * Free the association after un-hashing the remote port. This 4529 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4530 * expect that the input to this function IS a locked TCB. 4531 * It will return 0, if it did NOT destroy the association (instead 4532 * it unlocks it. It will return NON-zero if it either destroyed the 4533 * association OR the association is already destroyed. 4534 */ 4535 int 4536 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4537 { 4538 int i; 4539 struct sctp_association *asoc; 4540 struct sctp_nets *net, *prev; 4541 struct sctp_laddr *laddr; 4542 struct sctp_tmit_chunk *chk; 4543 struct sctp_asconf_addr *aparam; 4544 struct sctp_asconf_ack *aack; 4545 struct sctp_stream_reset_list *liste; 4546 struct sctp_queued_to_read *sq; 4547 struct sctp_stream_queue_pending *sp; 4548 sctp_sharedkey_t *shared_key; 4549 struct socket *so; 4550 int ccnt = 0; 4551 int cnt = 0; 4552 4553 /* first, lets purge the entry from the hash table. */ 4554 4555 #ifdef SCTP_LOG_CLOSING 4556 sctp_log_closing(inp, stcb, 6); 4557 #endif 4558 if (stcb->asoc.state == 0) { 4559 #ifdef SCTP_LOG_CLOSING 4560 sctp_log_closing(inp, NULL, 7); 4561 #endif 4562 /* there is no asoc, really TSNH :-0 */ 4563 return (1); 4564 } 4565 /* TEMP CODE */ 4566 if (stcb->freed_from_where == 0) { 4567 /* Only record the first place free happened from */ 4568 stcb->freed_from_where = from_location; 4569 } 4570 /* TEMP CODE */ 4571 4572 asoc = &stcb->asoc; 4573 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4574 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4575 /* nothing around */ 4576 so = NULL; 4577 else 4578 so = inp->sctp_socket; 4579 4580 /* 4581 * We used timer based freeing if a reader or writer is in the way. 4582 * So we first check if we are actually being called from a timer, 4583 * if so we abort early if a reader or writer is still in the way. 4584 */ 4585 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4586 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4587 /* 4588 * is it the timer driving us? if so are the reader/writers 4589 * gone? 4590 */ 4591 if (stcb->asoc.refcnt) { 4592 /* nope, reader or writer in the way */ 4593 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4594 /* no asoc destroyed */ 4595 SCTP_TCB_UNLOCK(stcb); 4596 #ifdef SCTP_LOG_CLOSING 4597 sctp_log_closing(inp, stcb, 8); 4598 #endif 4599 return (0); 4600 } 4601 } 4602 /* now clean up any other timers */ 4603 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4604 asoc->hb_timer.self = NULL; 4605 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4606 asoc->dack_timer.self = NULL; 4607 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4608 /*- 4609 * For stream reset we don't blast this unless 4610 * it is a str-reset timer, it might be the 4611 * free-asoc timer which we DON'T want to 4612 * disturb. 4613 */ 4614 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4615 asoc->strreset_timer.self = NULL; 4616 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4617 asoc->asconf_timer.self = NULL; 4618 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4619 asoc->autoclose_timer.self = NULL; 4620 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4621 asoc->shut_guard_timer.self = NULL; 4622 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4623 asoc->delayed_event_timer.self = NULL; 4624 /* Mobility adaptation */ 4625 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4626 asoc->delete_prim_timer.self = NULL; 4627 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4628 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4629 net->fr_timer.self = NULL; 4630 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4631 net->rxt_timer.self = NULL; 4632 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4633 net->pmtu_timer.self = NULL; 4634 } 4635 /* Now the read queue needs to be cleaned up (only once) */ 4636 cnt = 0; 4637 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4638 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4639 SCTP_INP_READ_LOCK(inp); 4640 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4641 if (sq->stcb == stcb) { 4642 sq->do_not_ref_stcb = 1; 4643 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4644 /* 4645 * If there is no end, there never will be 4646 * now. 4647 */ 4648 if (sq->end_added == 0) { 4649 /* Held for PD-API clear that. */ 4650 sq->pdapi_aborted = 1; 4651 sq->held_length = 0; 4652 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4653 /* 4654 * Need to add a PD-API 4655 * aborted indication. 4656 * Setting the control_pdapi 4657 * assures that it will be 4658 * added right after this 4659 * msg. 4660 */ 4661 uint32_t strseq; 4662 4663 stcb->asoc.control_pdapi = sq; 4664 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4665 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4666 stcb, 4667 SCTP_PARTIAL_DELIVERY_ABORTED, 4668 (void *)&strseq, 4669 SCTP_SO_LOCKED); 4670 stcb->asoc.control_pdapi = NULL; 4671 } 4672 } 4673 /* Add an end to wake them */ 4674 sq->end_added = 1; 4675 cnt++; 4676 } 4677 } 4678 SCTP_INP_READ_UNLOCK(inp); 4679 if (stcb->block_entry) { 4680 cnt++; 4681 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4682 stcb->block_entry->error = ECONNRESET; 4683 stcb->block_entry = NULL; 4684 } 4685 } 4686 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4687 /* 4688 * Someone holds a reference OR the socket is unaccepted 4689 * yet. 4690 */ 4691 if ((stcb->asoc.refcnt) || 4692 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4693 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4694 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4695 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4696 } 4697 SCTP_TCB_UNLOCK(stcb); 4698 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4699 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4700 /* nothing around */ 4701 so = NULL; 4702 if (so) { 4703 /* Wake any reader/writers */ 4704 sctp_sorwakeup(inp, so); 4705 sctp_sowwakeup(inp, so); 4706 } 4707 #ifdef SCTP_LOG_CLOSING 4708 sctp_log_closing(inp, stcb, 9); 4709 #endif 4710 /* no asoc destroyed */ 4711 return (0); 4712 } 4713 #ifdef SCTP_LOG_CLOSING 4714 sctp_log_closing(inp, stcb, 10); 4715 #endif 4716 /* 4717 * When I reach here, no others want to kill the assoc yet.. and I 4718 * own the lock. Now its possible an abort comes in when I do the 4719 * lock exchange below to grab all the locks to do the final take 4720 * out. to prevent this we increment the count, which will start a 4721 * timer and blow out above thus assuring us that we hold exclusive 4722 * killing of the asoc. Note that after getting back the TCB lock we 4723 * will go ahead and increment the counter back up and stop any 4724 * timer a passing stranger may have started :-S 4725 */ 4726 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4727 atomic_add_int(&stcb->asoc.refcnt, 1); 4728 4729 SCTP_TCB_UNLOCK(stcb); 4730 SCTP_INP_INFO_WLOCK(); 4731 SCTP_INP_WLOCK(inp); 4732 SCTP_TCB_LOCK(stcb); 4733 } 4734 /* Double check the GONE flag */ 4735 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4736 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4737 /* nothing around */ 4738 so = NULL; 4739 4740 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4741 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4742 /* 4743 * For TCP type we need special handling when we are 4744 * connected. We also include the peel'ed off ones to. 4745 */ 4746 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4747 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4748 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4749 if (so) { 4750 SOCK_LOCK(so); 4751 if (so->so_rcv.sb_cc == 0) { 4752 so->so_state &= ~(SS_ISCONNECTING | 4753 SS_ISDISCONNECTING | 4754 SS_ISCONFIRMING | 4755 SS_ISCONNECTED); 4756 } 4757 socantrcvmore_locked(so); 4758 sctp_sowwakeup(inp, so); 4759 sctp_sorwakeup(inp, so); 4760 SCTP_SOWAKEUP(so); 4761 } 4762 } 4763 } 4764 /* 4765 * Make it invalid too, that way if its about to run it will abort 4766 * and return. 4767 */ 4768 /* re-increment the lock */ 4769 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4770 atomic_add_int(&stcb->asoc.refcnt, -1); 4771 } 4772 if (stcb->asoc.refcnt) { 4773 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4774 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4775 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4776 SCTP_INP_INFO_WUNLOCK(); 4777 SCTP_INP_WUNLOCK(inp); 4778 } 4779 SCTP_TCB_UNLOCK(stcb); 4780 return (0); 4781 } 4782 asoc->state = 0; 4783 if (inp->sctp_tcbhash) { 4784 LIST_REMOVE(stcb, sctp_tcbhash); 4785 } 4786 if (stcb->asoc.in_asocid_hash) { 4787 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4788 } 4789 /* Now lets remove it from the list of ALL associations in the EP */ 4790 LIST_REMOVE(stcb, sctp_tcblist); 4791 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4792 SCTP_INP_INCR_REF(inp); 4793 SCTP_INP_WUNLOCK(inp); 4794 } 4795 /* pull from vtag hash */ 4796 LIST_REMOVE(stcb, sctp_asocs); 4797 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4798 inp->sctp_lport, stcb->rport); 4799 4800 /* 4801 * Now restop the timers to be sure this is paranoia at is finest! 4802 */ 4803 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4804 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4805 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4806 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4807 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4808 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4809 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4810 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4811 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4812 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4813 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4814 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4815 } 4816 4817 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4818 prev = NULL; 4819 /* 4820 * The chunk lists and such SHOULD be empty but we check them just 4821 * in case. 4822 */ 4823 /* anything on the wheel needs to be removed */ 4824 for (i = 0; i < asoc->streamoutcnt; i++) { 4825 struct sctp_stream_out *outs; 4826 4827 outs = &asoc->strmout[i]; 4828 /* now clean up any chunks here */ 4829 sp = TAILQ_FIRST(&outs->outqueue); 4830 while (sp) { 4831 TAILQ_REMOVE(&outs->outqueue, sp, next); 4832 if (sp->data) { 4833 sctp_m_freem(sp->data); 4834 sp->data = NULL; 4835 sp->tail_mbuf = NULL; 4836 } 4837 sctp_free_remote_addr(sp->net); 4838 sctp_free_spbufspace(stcb, asoc, sp); 4839 if (sp->holds_key_ref) 4840 sctp_auth_key_release(stcb, sp->auth_keyid); 4841 /* Free the zone stuff */ 4842 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 4843 SCTP_DECR_STRMOQ_COUNT(); 4844 /* sa_ignore FREED_MEMORY */ 4845 sp = TAILQ_FIRST(&outs->outqueue); 4846 } 4847 } 4848 4849 /* sa_ignore FREED_MEMORY */ 4850 while ((liste = TAILQ_FIRST(&asoc->resetHead)) != NULL) { 4851 TAILQ_REMOVE(&asoc->resetHead, liste, next_resp); 4852 SCTP_FREE(liste, SCTP_M_STRESET); 4853 } 4854 4855 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 4856 while (sq) { 4857 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4858 if (sq->data) { 4859 sctp_m_freem(sq->data); 4860 sq->data = NULL; 4861 } 4862 sctp_free_remote_addr(sq->whoFrom); 4863 sq->whoFrom = NULL; 4864 sq->stcb = NULL; 4865 /* Free the ctl entry */ 4866 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4867 SCTP_DECR_READQ_COUNT(); 4868 /* sa_ignore FREED_MEMORY */ 4869 sq = TAILQ_FIRST(&asoc->pending_reply_queue); 4870 } 4871 4872 chk = TAILQ_FIRST(&asoc->free_chunks); 4873 while (chk) { 4874 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4875 if (chk->data) { 4876 sctp_m_freem(chk->data); 4877 chk->data = NULL; 4878 } 4879 if (chk->holds_key_ref) 4880 sctp_auth_key_release(stcb, chk->auth_keyid); 4881 ccnt++; 4882 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4883 SCTP_DECR_CHK_COUNT(); 4884 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4885 asoc->free_chunk_cnt--; 4886 /* sa_ignore FREED_MEMORY */ 4887 chk = TAILQ_FIRST(&asoc->free_chunks); 4888 } 4889 /* pending send queue SHOULD be empty */ 4890 if (!TAILQ_EMPTY(&asoc->send_queue)) { 4891 chk = TAILQ_FIRST(&asoc->send_queue); 4892 while (chk) { 4893 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4894 if (chk->data) { 4895 sctp_m_freem(chk->data); 4896 chk->data = NULL; 4897 } 4898 if (chk->holds_key_ref) 4899 sctp_auth_key_release(stcb, chk->auth_keyid); 4900 ccnt++; 4901 sctp_free_remote_addr(chk->whoTo); 4902 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4903 SCTP_DECR_CHK_COUNT(); 4904 /* sa_ignore FREED_MEMORY */ 4905 chk = TAILQ_FIRST(&asoc->send_queue); 4906 } 4907 } 4908 /* 4909 if (ccnt) { 4910 printf("Freed %d from send_queue\n", ccnt); 4911 ccnt = 0; 4912 } 4913 */ 4914 /* sent queue SHOULD be empty */ 4915 if (!TAILQ_EMPTY(&asoc->sent_queue)) { 4916 chk = TAILQ_FIRST(&asoc->sent_queue); 4917 while (chk) { 4918 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4919 if (chk->data) { 4920 sctp_m_freem(chk->data); 4921 chk->data = NULL; 4922 } 4923 if (chk->holds_key_ref) 4924 sctp_auth_key_release(stcb, chk->auth_keyid); 4925 ccnt++; 4926 sctp_free_remote_addr(chk->whoTo); 4927 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4928 SCTP_DECR_CHK_COUNT(); 4929 /* sa_ignore FREED_MEMORY */ 4930 chk = TAILQ_FIRST(&asoc->sent_queue); 4931 } 4932 } 4933 /* 4934 if (ccnt) { 4935 printf("Freed %d from sent_queue\n", ccnt); 4936 ccnt = 0; 4937 } 4938 */ 4939 /* control queue MAY not be empty */ 4940 if (!TAILQ_EMPTY(&asoc->control_send_queue)) { 4941 chk = TAILQ_FIRST(&asoc->control_send_queue); 4942 while (chk) { 4943 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4944 if (chk->data) { 4945 sctp_m_freem(chk->data); 4946 chk->data = NULL; 4947 } 4948 if (chk->holds_key_ref) 4949 sctp_auth_key_release(stcb, chk->auth_keyid); 4950 ccnt++; 4951 sctp_free_remote_addr(chk->whoTo); 4952 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4953 SCTP_DECR_CHK_COUNT(); 4954 /* sa_ignore FREED_MEMORY */ 4955 chk = TAILQ_FIRST(&asoc->control_send_queue); 4956 } 4957 } 4958 /* 4959 if (ccnt) { 4960 printf("Freed %d from ctrl_queue\n", ccnt); 4961 ccnt = 0; 4962 } 4963 */ 4964 4965 /* ASCONF queue MAY not be empty */ 4966 if (!TAILQ_EMPTY(&asoc->asconf_send_queue)) { 4967 chk = TAILQ_FIRST(&asoc->asconf_send_queue); 4968 while (chk) { 4969 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4970 if (chk->data) { 4971 sctp_m_freem(chk->data); 4972 chk->data = NULL; 4973 } 4974 if (chk->holds_key_ref) 4975 sctp_auth_key_release(stcb, chk->auth_keyid); 4976 ccnt++; 4977 sctp_free_remote_addr(chk->whoTo); 4978 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4979 SCTP_DECR_CHK_COUNT(); 4980 /* sa_ignore FREED_MEMORY */ 4981 chk = TAILQ_FIRST(&asoc->asconf_send_queue); 4982 } 4983 } 4984 /* 4985 if (ccnt) { 4986 printf("Freed %d from asconf_queue\n", ccnt); 4987 ccnt = 0; 4988 } 4989 */ 4990 if (!TAILQ_EMPTY(&asoc->reasmqueue)) { 4991 chk = TAILQ_FIRST(&asoc->reasmqueue); 4992 while (chk) { 4993 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4994 if (chk->data) { 4995 sctp_m_freem(chk->data); 4996 chk->data = NULL; 4997 } 4998 if (chk->holds_key_ref) 4999 sctp_auth_key_release(stcb, chk->auth_keyid); 5000 sctp_free_remote_addr(chk->whoTo); 5001 ccnt++; 5002 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5003 SCTP_DECR_CHK_COUNT(); 5004 /* sa_ignore FREED_MEMORY */ 5005 chk = TAILQ_FIRST(&asoc->reasmqueue); 5006 } 5007 } 5008 /* 5009 if (ccnt) { 5010 printf("Freed %d from reasm_queue\n", ccnt); 5011 ccnt = 0; 5012 } 5013 */ 5014 if (asoc->mapping_array) { 5015 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5016 asoc->mapping_array = NULL; 5017 } 5018 if (asoc->nr_mapping_array) { 5019 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5020 asoc->nr_mapping_array = NULL; 5021 } 5022 /* the stream outs */ 5023 if (asoc->strmout) { 5024 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5025 asoc->strmout = NULL; 5026 } 5027 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5028 if (asoc->strmin) { 5029 struct sctp_queued_to_read *ctl; 5030 5031 for (i = 0; i < asoc->streamincnt; i++) { 5032 if (!TAILQ_EMPTY(&asoc->strmin[i].inqueue)) { 5033 /* We have somethings on the streamin queue */ 5034 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 5035 while (ctl) { 5036 TAILQ_REMOVE(&asoc->strmin[i].inqueue, 5037 ctl, next); 5038 sctp_free_remote_addr(ctl->whoFrom); 5039 if (ctl->data) { 5040 sctp_m_freem(ctl->data); 5041 ctl->data = NULL; 5042 } 5043 /* 5044 * We don't free the address here 5045 * since all the net's were freed 5046 * above. 5047 */ 5048 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5049 SCTP_DECR_READQ_COUNT(); 5050 ctl = TAILQ_FIRST(&asoc->strmin[i].inqueue); 5051 } 5052 } 5053 } 5054 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5055 asoc->strmin = NULL; 5056 } 5057 asoc->streamincnt = 0; 5058 while (!TAILQ_EMPTY(&asoc->nets)) { 5059 /* sa_ignore FREED_MEMORY */ 5060 net = TAILQ_FIRST(&asoc->nets); 5061 /* pull from list */ 5062 if ((SCTP_BASE_INFO(ipi_count_raddr) == 0) || (prev == net)) { 5063 #ifdef INVARIANTS 5064 panic("no net's left alloc'ed, or list points to itself"); 5065 #endif 5066 break; 5067 } 5068 prev = net; 5069 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5070 sctp_free_remote_addr(net); 5071 } 5072 5073 while (!LIST_EMPTY(&asoc->sctp_restricted_addrs)) { 5074 /* sa_ignore FREED_MEMORY */ 5075 laddr = LIST_FIRST(&asoc->sctp_restricted_addrs); 5076 sctp_remove_laddr(laddr); 5077 } 5078 5079 /* pending asconf (address) parameters */ 5080 while (!TAILQ_EMPTY(&asoc->asconf_queue)) { 5081 /* sa_ignore FREED_MEMORY */ 5082 aparam = TAILQ_FIRST(&asoc->asconf_queue); 5083 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5084 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5085 } 5086 while (!TAILQ_EMPTY(&asoc->asconf_ack_sent)) { 5087 /* sa_ignore FREED_MEMORY */ 5088 aack = TAILQ_FIRST(&asoc->asconf_ack_sent); 5089 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5090 if (aack->data != NULL) { 5091 sctp_m_freem(aack->data); 5092 } 5093 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5094 } 5095 /* clean up auth stuff */ 5096 if (asoc->local_hmacs) 5097 sctp_free_hmaclist(asoc->local_hmacs); 5098 if (asoc->peer_hmacs) 5099 sctp_free_hmaclist(asoc->peer_hmacs); 5100 5101 if (asoc->local_auth_chunks) 5102 sctp_free_chunklist(asoc->local_auth_chunks); 5103 if (asoc->peer_auth_chunks) 5104 sctp_free_chunklist(asoc->peer_auth_chunks); 5105 5106 sctp_free_authinfo(&asoc->authinfo); 5107 5108 shared_key = LIST_FIRST(&asoc->shared_keys); 5109 while (shared_key) { 5110 LIST_REMOVE(shared_key, next); 5111 sctp_free_sharedkey(shared_key); 5112 /* sa_ignore FREED_MEMORY */ 5113 shared_key = LIST_FIRST(&asoc->shared_keys); 5114 } 5115 5116 /* Insert new items here :> */ 5117 5118 /* Get rid of LOCK */ 5119 SCTP_TCB_LOCK_DESTROY(stcb); 5120 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5121 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5122 SCTP_INP_INFO_WUNLOCK(); 5123 SCTP_INP_RLOCK(inp); 5124 } 5125 #ifdef SCTP_TRACK_FREED_ASOCS 5126 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5127 /* now clean up the tasoc itself */ 5128 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5129 SCTP_DECR_ASOC_COUNT(); 5130 } else { 5131 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5132 } 5133 #else 5134 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5135 SCTP_DECR_ASOC_COUNT(); 5136 #endif 5137 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5138 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5139 /* 5140 * If its NOT the inp_free calling us AND sctp_close 5141 * as been called, we call back... 5142 */ 5143 SCTP_INP_RUNLOCK(inp); 5144 /* 5145 * This will start the kill timer (if we are the 5146 * lastone) since we hold an increment yet. But this 5147 * is the only safe way to do this since otherwise 5148 * if the socket closes at the same time we are here 5149 * we might collide in the cleanup. 5150 */ 5151 sctp_inpcb_free(inp, 5152 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5153 SCTP_CALLED_DIRECTLY_NOCMPSET); 5154 SCTP_INP_DECR_REF(inp); 5155 goto out_of; 5156 } else { 5157 /* The socket is still open. */ 5158 SCTP_INP_DECR_REF(inp); 5159 } 5160 } 5161 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5162 SCTP_INP_RUNLOCK(inp); 5163 } 5164 out_of: 5165 /* destroyed the asoc */ 5166 #ifdef SCTP_LOG_CLOSING 5167 sctp_log_closing(inp, NULL, 11); 5168 #endif 5169 return (1); 5170 } 5171 5172 5173 5174 /* 5175 * determine if a destination is "reachable" based upon the addresses bound 5176 * to the current endpoint (e.g. only v4 or v6 currently bound) 5177 */ 5178 /* 5179 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5180 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5181 * types bound as its endpoint 5182 */ 5183 int 5184 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5185 { 5186 struct sctp_inpcb *inp; 5187 int answer; 5188 5189 /* 5190 * No locks here, the TCB, in all cases is already locked and an 5191 * assoc is up. There is either a INP lock by the caller applied (in 5192 * asconf case when deleting an address) or NOT in the HB case, 5193 * however if HB then the INP increment is up and the INP will not 5194 * be removed (on top of the fact that we have a TCB lock). So we 5195 * only want to read the sctp_flags, which is either bound-all or 5196 * not.. no protection needed since once an assoc is up you can't be 5197 * changing your binding. 5198 */ 5199 inp = stcb->sctp_ep; 5200 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5201 /* if bound all, destination is not restricted */ 5202 /* 5203 * RRS: Question during lock work: Is this correct? If you 5204 * are bound-all you still might need to obey the V4--V6 5205 * flags??? IMO this bound-all stuff needs to be removed! 5206 */ 5207 return (1); 5208 } 5209 /* NOTE: all "scope" checks are done when local addresses are added */ 5210 if (destaddr->sa_family == AF_INET6) { 5211 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5212 } else if (destaddr->sa_family == AF_INET) { 5213 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5214 } else { 5215 /* invalid family, so it's unreachable */ 5216 answer = 0; 5217 } 5218 return (answer); 5219 } 5220 5221 /* 5222 * update the inp_vflags on an endpoint 5223 */ 5224 static void 5225 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5226 { 5227 struct sctp_laddr *laddr; 5228 5229 /* first clear the flag */ 5230 inp->ip_inp.inp.inp_vflag = 0; 5231 /* set the flag based on addresses on the ep list */ 5232 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5233 if (laddr->ifa == NULL) { 5234 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5235 __FUNCTION__); 5236 continue; 5237 } 5238 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5239 continue; 5240 } 5241 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 5242 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5243 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 5244 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5245 } 5246 } 5247 } 5248 5249 /* 5250 * Add the address to the endpoint local address list There is nothing to be 5251 * done if we are bound to all addresses 5252 */ 5253 void 5254 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5255 { 5256 struct sctp_laddr *laddr; 5257 int fnd, error = 0; 5258 5259 fnd = 0; 5260 5261 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5262 /* You are already bound to all. You have it already */ 5263 return; 5264 } 5265 if (ifa->address.sa.sa_family == AF_INET6) { 5266 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5267 /* Can't bind a non-useable addr. */ 5268 return; 5269 } 5270 } 5271 /* first, is it already present? */ 5272 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5273 if (laddr->ifa == ifa) { 5274 fnd = 1; 5275 break; 5276 } 5277 } 5278 5279 if (fnd == 0) { 5280 /* Not in the ep list */ 5281 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5282 if (error != 0) 5283 return; 5284 inp->laddr_count++; 5285 /* update inp_vflag flags */ 5286 if (ifa->address.sa.sa_family == AF_INET6) { 5287 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5288 } else if (ifa->address.sa.sa_family == AF_INET) { 5289 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5290 } 5291 } 5292 return; 5293 } 5294 5295 5296 /* 5297 * select a new (hopefully reachable) destination net (should only be used 5298 * when we deleted an ep addr that is the only usable source address to reach 5299 * the destination net) 5300 */ 5301 static void 5302 sctp_select_primary_destination(struct sctp_tcb *stcb) 5303 { 5304 struct sctp_nets *net; 5305 5306 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5307 /* for now, we'll just pick the first reachable one we find */ 5308 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5309 continue; 5310 if (sctp_destination_is_reachable(stcb, 5311 (struct sockaddr *)&net->ro._l_addr)) { 5312 /* found a reachable destination */ 5313 stcb->asoc.primary_destination = net; 5314 } 5315 } 5316 /* I can't there from here! ...we're gonna die shortly... */ 5317 } 5318 5319 5320 /* 5321 * Delete the address from the endpoint local address list There is nothing 5322 * to be done if we are bound to all addresses 5323 */ 5324 void 5325 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5326 { 5327 struct sctp_laddr *laddr; 5328 int fnd; 5329 5330 fnd = 0; 5331 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5332 /* You are already bound to all. You have it already */ 5333 return; 5334 } 5335 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5336 if (laddr->ifa == ifa) { 5337 fnd = 1; 5338 break; 5339 } 5340 } 5341 if (fnd && (inp->laddr_count < 2)) { 5342 /* can't delete unless there are at LEAST 2 addresses */ 5343 return; 5344 } 5345 if (fnd) { 5346 /* 5347 * clean up any use of this address go through our 5348 * associations and clear any last_used_address that match 5349 * this one for each assoc, see if a new primary_destination 5350 * is needed 5351 */ 5352 struct sctp_tcb *stcb; 5353 5354 /* clean up "next_addr_touse" */ 5355 if (inp->next_addr_touse == laddr) 5356 /* delete this address */ 5357 inp->next_addr_touse = NULL; 5358 5359 /* clean up "last_used_address" */ 5360 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5361 struct sctp_nets *net; 5362 5363 SCTP_TCB_LOCK(stcb); 5364 if (stcb->asoc.last_used_address == laddr) 5365 /* delete this address */ 5366 stcb->asoc.last_used_address = NULL; 5367 /* 5368 * Now spin through all the nets and purge any ref 5369 * to laddr 5370 */ 5371 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5372 if (net->ro._s_addr && 5373 (net->ro._s_addr->ifa == laddr->ifa)) { 5374 /* Yep, purge src address selected */ 5375 sctp_rtentry_t *rt; 5376 5377 /* delete this address if cached */ 5378 rt = net->ro.ro_rt; 5379 if (rt != NULL) { 5380 RTFREE(rt); 5381 net->ro.ro_rt = NULL; 5382 } 5383 sctp_free_ifa(net->ro._s_addr); 5384 net->ro._s_addr = NULL; 5385 net->src_addr_selected = 0; 5386 } 5387 } 5388 SCTP_TCB_UNLOCK(stcb); 5389 } /* for each tcb */ 5390 /* remove it from the ep list */ 5391 sctp_remove_laddr(laddr); 5392 inp->laddr_count--; 5393 /* update inp_vflag flags */ 5394 sctp_update_ep_vflag(inp); 5395 } 5396 return; 5397 } 5398 5399 /* 5400 * Add the address to the TCB local address restricted list. 5401 * This is a "pending" address list (eg. addresses waiting for an 5402 * ASCONF-ACK response) and cannot be used as a valid source address. 5403 */ 5404 void 5405 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5406 { 5407 struct sctp_inpcb *inp; 5408 struct sctp_laddr *laddr; 5409 struct sctpladdr *list; 5410 5411 /* 5412 * Assumes TCB is locked.. and possibly the INP. May need to 5413 * confirm/fix that if we need it and is not the case. 5414 */ 5415 list = &stcb->asoc.sctp_restricted_addrs; 5416 5417 inp = stcb->sctp_ep; 5418 if (ifa->address.sa.sa_family == AF_INET6) { 5419 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5420 /* Can't bind a non-existent addr. */ 5421 return; 5422 } 5423 } 5424 /* does the address already exist? */ 5425 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5426 if (laddr->ifa == ifa) { 5427 return; 5428 } 5429 } 5430 5431 /* add to the list */ 5432 (void)sctp_insert_laddr(list, ifa, 0); 5433 return; 5434 } 5435 5436 /* 5437 * insert an laddr entry with the given ifa for the desired list 5438 */ 5439 int 5440 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5441 { 5442 struct sctp_laddr *laddr; 5443 5444 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5445 if (laddr == NULL) { 5446 /* out of memory? */ 5447 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5448 return (EINVAL); 5449 } 5450 SCTP_INCR_LADDR_COUNT(); 5451 bzero(laddr, sizeof(*laddr)); 5452 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5453 laddr->ifa = ifa; 5454 laddr->action = act; 5455 atomic_add_int(&ifa->refcount, 1); 5456 /* insert it */ 5457 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5458 5459 return (0); 5460 } 5461 5462 /* 5463 * Remove an laddr entry from the local address list (on an assoc) 5464 */ 5465 void 5466 sctp_remove_laddr(struct sctp_laddr *laddr) 5467 { 5468 5469 /* remove from the list */ 5470 LIST_REMOVE(laddr, sctp_nxt_addr); 5471 sctp_free_ifa(laddr->ifa); 5472 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5473 SCTP_DECR_LADDR_COUNT(); 5474 } 5475 5476 /* 5477 * Remove a local address from the TCB local address restricted list 5478 */ 5479 void 5480 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5481 { 5482 struct sctp_inpcb *inp; 5483 struct sctp_laddr *laddr; 5484 5485 /* 5486 * This is called by asconf work. It is assumed that a) The TCB is 5487 * locked and b) The INP is locked. This is true in as much as I can 5488 * trace through the entry asconf code where I did these locks. 5489 * Again, the ASCONF code is a bit different in that it does lock 5490 * the INP during its work often times. This must be since we don't 5491 * want other proc's looking up things while what they are looking 5492 * up is changing :-D 5493 */ 5494 5495 inp = stcb->sctp_ep; 5496 /* if subset bound and don't allow ASCONF's, can't delete last */ 5497 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5498 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5499 if (stcb->sctp_ep->laddr_count < 2) { 5500 /* can't delete last address */ 5501 return; 5502 } 5503 } 5504 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5505 /* remove the address if it exists */ 5506 if (laddr->ifa == NULL) 5507 continue; 5508 if (laddr->ifa == ifa) { 5509 sctp_remove_laddr(laddr); 5510 return; 5511 } 5512 } 5513 5514 /* address not found! */ 5515 return; 5516 } 5517 5518 /* 5519 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5520 */ 5521 /* sysctl */ 5522 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5523 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5524 5525 void 5526 sctp_pcb_init() 5527 { 5528 /* 5529 * SCTP initialization for the PCB structures should be called by 5530 * the sctp_init() funciton. 5531 */ 5532 int i; 5533 struct timeval tv; 5534 5535 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5536 /* error I was called twice */ 5537 return; 5538 } 5539 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5540 5541 #if defined(SCTP_LOCAL_TRACE_BUF) 5542 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5543 #endif 5544 (void)SCTP_GETTIME_TIMEVAL(&tv); 5545 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5546 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5547 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5548 #else 5549 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5550 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5551 #endif 5552 /* init the empty list of (All) Endpoints */ 5553 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5554 5555 5556 /* init the hash table of endpoints */ 5557 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5558 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5559 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5560 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5561 &SCTP_BASE_INFO(hashasocmark)); 5562 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5563 &SCTP_BASE_INFO(hashmark)); 5564 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5565 &SCTP_BASE_INFO(hashtcpmark)); 5566 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5567 5568 5569 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5570 &SCTP_BASE_INFO(hashvrfmark)); 5571 5572 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5573 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5574 /* init the zones */ 5575 /* 5576 * FIX ME: Should check for NULL returns, but if it does fail we are 5577 * doomed to panic anyways... add later maybe. 5578 */ 5579 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5580 sizeof(struct sctp_inpcb), maxsockets); 5581 5582 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5583 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5584 5585 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5586 sizeof(struct sctp_laddr), 5587 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5588 5589 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5590 sizeof(struct sctp_nets), 5591 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5592 5593 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5594 sizeof(struct sctp_tmit_chunk), 5595 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5596 5597 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5598 sizeof(struct sctp_queued_to_read), 5599 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5600 5601 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5602 sizeof(struct sctp_stream_queue_pending), 5603 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5604 5605 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5606 sizeof(struct sctp_asconf), 5607 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5608 5609 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5610 sizeof(struct sctp_asconf_ack), 5611 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5612 5613 5614 /* Master Lock INIT for info structure */ 5615 SCTP_INP_INFO_LOCK_INIT(); 5616 SCTP_STATLOG_INIT_LOCK(); 5617 5618 SCTP_IPI_COUNT_INIT(); 5619 SCTP_IPI_ADDR_INIT(); 5620 #ifdef SCTP_PACKET_LOGGING 5621 SCTP_IP_PKTLOG_INIT(); 5622 #endif 5623 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5624 5625 SCTP_WQ_ADDR_INIT(); 5626 /* not sure if we need all the counts */ 5627 SCTP_BASE_INFO(ipi_count_ep) = 0; 5628 /* assoc/tcb zone info */ 5629 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5630 /* local addrlist zone info */ 5631 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5632 /* remote addrlist zone info */ 5633 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5634 /* chunk info */ 5635 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5636 5637 /* socket queue zone info */ 5638 SCTP_BASE_INFO(ipi_count_readq) = 0; 5639 5640 /* stream out queue cont */ 5641 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5642 5643 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5644 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5645 5646 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5647 5648 /* Init the TIMEWAIT list */ 5649 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5650 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5651 } 5652 5653 sctp_startup_iterator(); 5654 5655 /* 5656 * INIT the default VRF which for BSD is the only one, other O/S's 5657 * may have more. But initially they must start with one and then 5658 * add the VRF's as addresses are added. 5659 */ 5660 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5661 5662 } 5663 5664 /* 5665 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5666 */ 5667 void 5668 sctp_pcb_finish(void) 5669 { 5670 struct sctp_vrflist *vrf_bucket; 5671 struct sctp_vrf *vrf; 5672 struct sctp_ifn *ifn; 5673 struct sctp_ifa *ifa; 5674 struct sctpvtaghead *chain; 5675 struct sctp_tagblock *twait_block, *prev_twait_block; 5676 struct sctp_laddr *wi; 5677 int i; 5678 5679 /* 5680 * Free BSD the it thread never exits but we do clean up. The only 5681 * way freebsd reaches here if we have VRF's but we still add the 5682 * ifdef to make it compile on old versions. 5683 */ 5684 { 5685 struct sctp_iterator *it, *nit; 5686 5687 SCTP_IPI_ITERATOR_WQ_LOCK(); 5688 it = TAILQ_FIRST(&sctp_it_ctl.iteratorhead); 5689 while (it) { 5690 nit = TAILQ_NEXT(it, sctp_nxt_itr); 5691 if (it->vn != curvnet) { 5692 it = nit; 5693 continue; 5694 } 5695 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 5696 it, sctp_nxt_itr); 5697 if (it->function_atend != NULL) { 5698 (*it->function_atend) (it->pointer, it->val); 5699 } 5700 SCTP_FREE(it, SCTP_M_ITER); 5701 it = nit; 5702 } 5703 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5704 SCTP_ITERATOR_LOCK(); 5705 if ((sctp_it_ctl.cur_it) && 5706 (sctp_it_ctl.cur_it->vn == curvnet)) { 5707 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5708 } 5709 SCTP_ITERATOR_UNLOCK(); 5710 } 5711 5712 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5713 SCTP_WQ_ADDR_LOCK(); 5714 while ((wi = LIST_FIRST(&SCTP_BASE_INFO(addr_wq))) != NULL) { 5715 LIST_REMOVE(wi, sctp_nxt_addr); 5716 SCTP_DECR_LADDR_COUNT(); 5717 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5718 } 5719 SCTP_WQ_ADDR_UNLOCK(); 5720 5721 /* 5722 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5723 * destroyed first). 5724 */ 5725 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5726 while ((vrf = LIST_FIRST(vrf_bucket)) != NULL) { 5727 while ((ifn = LIST_FIRST(&vrf->ifnlist)) != NULL) { 5728 while ((ifa = LIST_FIRST(&ifn->ifalist)) != NULL) { 5729 /* free the ifa */ 5730 LIST_REMOVE(ifa, next_bucket); 5731 LIST_REMOVE(ifa, next_ifa); 5732 SCTP_FREE(ifa, SCTP_M_IFA); 5733 } 5734 /* free the ifn */ 5735 LIST_REMOVE(ifn, next_bucket); 5736 LIST_REMOVE(ifn, next_ifn); 5737 SCTP_FREE(ifn, SCTP_M_IFN); 5738 } 5739 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5740 /* free the vrf */ 5741 LIST_REMOVE(vrf, next_vrf); 5742 SCTP_FREE(vrf, SCTP_M_VRF); 5743 } 5744 /* free the vrf hashes */ 5745 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5746 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5747 5748 /* 5749 * free the TIMEWAIT list elements malloc'd in the function 5750 * sctp_add_vtag_to_timewait()... 5751 */ 5752 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5753 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5754 if (!LIST_EMPTY(chain)) { 5755 prev_twait_block = NULL; 5756 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5757 if (prev_twait_block) { 5758 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5759 } 5760 prev_twait_block = twait_block; 5761 } 5762 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5763 } 5764 } 5765 5766 /* free the locks and mutexes */ 5767 #ifdef SCTP_PACKET_LOGGING 5768 SCTP_IP_PKTLOG_DESTROY(); 5769 #endif 5770 SCTP_IPI_ADDR_DESTROY(); 5771 SCTP_STATLOG_DESTROY(); 5772 SCTP_INP_INFO_LOCK_DESTROY(); 5773 5774 SCTP_WQ_ADDR_DESTROY(); 5775 5776 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5777 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5778 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5779 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5780 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5781 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5782 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5783 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5784 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5785 /* Get rid of other stuff to */ 5786 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5787 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5788 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5789 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5790 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5791 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5792 5793 } 5794 5795 5796 int 5797 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5798 int iphlen, int offset, int limit, struct sctphdr *sh, 5799 struct sockaddr *altsa) 5800 { 5801 /* 5802 * grub through the INIT pulling addresses and loading them to the 5803 * nets structure in the asoc. The from address in the mbuf should 5804 * also be loaded (if it is not already). This routine can be called 5805 * with either INIT or INIT-ACK's as long as the m points to the IP 5806 * packet and the offset points to the beginning of the parameters. 5807 */ 5808 struct sctp_inpcb *inp, *l_inp; 5809 struct sctp_nets *net, *net_tmp; 5810 struct ip *iph; 5811 struct sctp_paramhdr *phdr, parm_buf; 5812 struct sctp_tcb *stcb_tmp; 5813 uint16_t ptype, plen; 5814 struct sockaddr *sa; 5815 struct sockaddr_storage dest_store; 5816 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 5817 struct sockaddr_in sin; 5818 struct sockaddr_in6 sin6; 5819 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5820 struct sctp_auth_random *p_random = NULL; 5821 uint16_t random_len = 0; 5822 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5823 struct sctp_auth_hmac_algo *hmacs = NULL; 5824 uint16_t hmacs_len = 0; 5825 uint8_t saw_asconf = 0; 5826 uint8_t saw_asconf_ack = 0; 5827 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 5828 struct sctp_auth_chunk_list *chunks = NULL; 5829 uint16_t num_chunks = 0; 5830 sctp_key_t *new_key; 5831 uint32_t keylen; 5832 int got_random = 0, got_hmacs = 0, got_chklist = 0; 5833 5834 /* First get the destination address setup too. */ 5835 memset(&sin, 0, sizeof(sin)); 5836 memset(&sin6, 0, sizeof(sin6)); 5837 5838 sin.sin_family = AF_INET; 5839 sin.sin_len = sizeof(sin); 5840 sin.sin_port = stcb->rport; 5841 5842 sin6.sin6_family = AF_INET6; 5843 sin6.sin6_len = sizeof(struct sockaddr_in6); 5844 sin6.sin6_port = stcb->rport; 5845 if (altsa == NULL) { 5846 iph = mtod(m, struct ip *); 5847 switch (iph->ip_v) { 5848 case IPVERSION: 5849 { 5850 /* its IPv4 */ 5851 struct sockaddr_in *sin_2; 5852 5853 sin_2 = (struct sockaddr_in *)(local_sa); 5854 memset(sin_2, 0, sizeof(sin)); 5855 sin_2->sin_family = AF_INET; 5856 sin_2->sin_len = sizeof(sin); 5857 sin_2->sin_port = sh->dest_port; 5858 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 5859 sin.sin_addr = iph->ip_src; 5860 sa = (struct sockaddr *)&sin; 5861 break; 5862 } 5863 #ifdef INET6 5864 case IPV6_VERSION >> 4: 5865 { 5866 /* its IPv6 */ 5867 struct ip6_hdr *ip6; 5868 struct sockaddr_in6 *sin6_2; 5869 5870 ip6 = mtod(m, struct ip6_hdr *); 5871 sin6_2 = (struct sockaddr_in6 *)(local_sa); 5872 memset(sin6_2, 0, sizeof(sin6)); 5873 sin6_2->sin6_family = AF_INET6; 5874 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 5875 sin6_2->sin6_port = sh->dest_port; 5876 sin6.sin6_addr = ip6->ip6_src; 5877 sa = (struct sockaddr *)&sin6; 5878 break; 5879 } 5880 #endif 5881 default: 5882 sa = NULL; 5883 break; 5884 } 5885 } else { 5886 /* 5887 * For cookies we use the src address NOT from the packet 5888 * but from the original INIT 5889 */ 5890 sa = altsa; 5891 } 5892 /* Turn off ECN until we get through all params */ 5893 stcb->asoc.ecn_allowed = 0; 5894 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5895 /* mark all addresses that we have currently on the list */ 5896 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 5897 } 5898 /* does the source address already exist? if so skip it */ 5899 l_inp = inp = stcb->sctp_ep; 5900 5901 atomic_add_int(&stcb->asoc.refcnt, 1); 5902 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 5903 atomic_add_int(&stcb->asoc.refcnt, -1); 5904 5905 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 5906 /* we must add the source address */ 5907 /* no scope set here since we have a tcb already. */ 5908 if ((sa->sa_family == AF_INET) && 5909 (stcb->asoc.ipv4_addr_legal)) { 5910 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 5911 return (-1); 5912 } 5913 } else if ((sa->sa_family == AF_INET6) && 5914 (stcb->asoc.ipv6_addr_legal)) { 5915 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 5916 return (-2); 5917 } 5918 } 5919 } else { 5920 if (net_tmp != NULL && stcb_tmp == stcb) { 5921 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 5922 } else if (stcb_tmp != stcb) { 5923 /* It belongs to another association? */ 5924 if (stcb_tmp) 5925 SCTP_TCB_UNLOCK(stcb_tmp); 5926 return (-3); 5927 } 5928 } 5929 if (stcb->asoc.state == 0) { 5930 /* the assoc was freed? */ 5931 return (-4); 5932 } 5933 /* 5934 * peer must explicitly turn this on. This may have been initialized 5935 * to be "on" in order to allow local addr changes while INIT's are 5936 * in flight. 5937 */ 5938 stcb->asoc.peer_supports_asconf = 0; 5939 /* now we must go through each of the params. */ 5940 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 5941 while (phdr) { 5942 ptype = ntohs(phdr->param_type); 5943 plen = ntohs(phdr->param_length); 5944 /* 5945 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 5946 * (int)plen); 5947 */ 5948 if (offset + plen > limit) { 5949 break; 5950 } 5951 if (plen == 0) { 5952 break; 5953 } 5954 if (ptype == SCTP_IPV4_ADDRESS) { 5955 if (stcb->asoc.ipv4_addr_legal) { 5956 struct sctp_ipv4addr_param *p4, p4_buf; 5957 5958 /* ok get the v4 address and check/add */ 5959 phdr = sctp_get_next_param(m, offset, 5960 (struct sctp_paramhdr *)&p4_buf, 5961 sizeof(p4_buf)); 5962 if (plen != sizeof(struct sctp_ipv4addr_param) || 5963 phdr == NULL) { 5964 return (-5); 5965 } 5966 p4 = (struct sctp_ipv4addr_param *)phdr; 5967 sin.sin_addr.s_addr = p4->addr; 5968 if (IN_MULTICAST(sin.sin_addr.s_addr)) { 5969 /* Skip multi-cast addresses */ 5970 goto next_param; 5971 } 5972 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 5973 (sin.sin_addr.s_addr == INADDR_ANY)) { 5974 goto next_param; 5975 } 5976 sa = (struct sockaddr *)&sin; 5977 inp = stcb->sctp_ep; 5978 atomic_add_int(&stcb->asoc.refcnt, 1); 5979 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5980 local_sa, stcb); 5981 atomic_add_int(&stcb->asoc.refcnt, -1); 5982 5983 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 5984 inp == NULL) { 5985 /* we must add the source address */ 5986 /* 5987 * no scope set since we have a tcb 5988 * already 5989 */ 5990 5991 /* 5992 * we must validate the state again 5993 * here 5994 */ 5995 add_it_now: 5996 if (stcb->asoc.state == 0) { 5997 /* the assoc was freed? */ 5998 return (-7); 5999 } 6000 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6001 return (-8); 6002 } 6003 } else if (stcb_tmp == stcb) { 6004 if (stcb->asoc.state == 0) { 6005 /* the assoc was freed? */ 6006 return (-10); 6007 } 6008 if (net != NULL) { 6009 /* clear flag */ 6010 net->dest_state &= 6011 ~SCTP_ADDR_NOT_IN_ASSOC; 6012 } 6013 } else { 6014 /* 6015 * strange, address is in another 6016 * assoc? straighten out locks. 6017 */ 6018 if (stcb_tmp) { 6019 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6020 /* 6021 * in setup state we 6022 * abort this guy 6023 */ 6024 sctp_abort_an_association(stcb_tmp->sctp_ep, 6025 stcb_tmp, 1, NULL, 0); 6026 goto add_it_now; 6027 } 6028 SCTP_TCB_UNLOCK(stcb_tmp); 6029 } 6030 if (stcb->asoc.state == 0) { 6031 /* the assoc was freed? */ 6032 return (-12); 6033 } 6034 return (-13); 6035 } 6036 } 6037 } else if (ptype == SCTP_IPV6_ADDRESS) { 6038 if (stcb->asoc.ipv6_addr_legal) { 6039 /* ok get the v6 address and check/add */ 6040 struct sctp_ipv6addr_param *p6, p6_buf; 6041 6042 phdr = sctp_get_next_param(m, offset, 6043 (struct sctp_paramhdr *)&p6_buf, 6044 sizeof(p6_buf)); 6045 if (plen != sizeof(struct sctp_ipv6addr_param) || 6046 phdr == NULL) { 6047 return (-14); 6048 } 6049 p6 = (struct sctp_ipv6addr_param *)phdr; 6050 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6051 sizeof(p6->addr)); 6052 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6053 /* Skip multi-cast addresses */ 6054 goto next_param; 6055 } 6056 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6057 /* 6058 * Link local make no sense without 6059 * scope 6060 */ 6061 goto next_param; 6062 } 6063 sa = (struct sockaddr *)&sin6; 6064 inp = stcb->sctp_ep; 6065 atomic_add_int(&stcb->asoc.refcnt, 1); 6066 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6067 local_sa, stcb); 6068 atomic_add_int(&stcb->asoc.refcnt, -1); 6069 if (stcb_tmp == NULL && 6070 (inp == stcb->sctp_ep || inp == NULL)) { 6071 /* 6072 * we must validate the state again 6073 * here 6074 */ 6075 add_it_now6: 6076 if (stcb->asoc.state == 0) { 6077 /* the assoc was freed? */ 6078 return (-16); 6079 } 6080 /* 6081 * we must add the address, no scope 6082 * set 6083 */ 6084 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6085 return (-17); 6086 } 6087 } else if (stcb_tmp == stcb) { 6088 /* 6089 * we must validate the state again 6090 * here 6091 */ 6092 if (stcb->asoc.state == 0) { 6093 /* the assoc was freed? */ 6094 return (-19); 6095 } 6096 if (net != NULL) { 6097 /* clear flag */ 6098 net->dest_state &= 6099 ~SCTP_ADDR_NOT_IN_ASSOC; 6100 } 6101 } else { 6102 /* 6103 * strange, address is in another 6104 * assoc? straighten out locks. 6105 */ 6106 if (stcb_tmp) 6107 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6108 /* 6109 * in setup state we 6110 * abort this guy 6111 */ 6112 sctp_abort_an_association(stcb_tmp->sctp_ep, 6113 stcb_tmp, 1, NULL, 0); 6114 goto add_it_now6; 6115 } 6116 SCTP_TCB_UNLOCK(stcb_tmp); 6117 6118 if (stcb->asoc.state == 0) { 6119 /* the assoc was freed? */ 6120 return (-21); 6121 } 6122 return (-22); 6123 } 6124 } 6125 } else if (ptype == SCTP_ECN_CAPABLE) { 6126 stcb->asoc.ecn_allowed = 1; 6127 } else if (ptype == SCTP_ULP_ADAPTATION) { 6128 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6129 struct sctp_adaptation_layer_indication ai, 6130 *aip; 6131 6132 phdr = sctp_get_next_param(m, offset, 6133 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6134 aip = (struct sctp_adaptation_layer_indication *)phdr; 6135 if (aip) { 6136 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6137 stcb->asoc.adaptation_needed = 1; 6138 } 6139 } 6140 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6141 struct sctp_asconf_addr_param lstore, *fee; 6142 struct sctp_asconf_addrv4_param *fii; 6143 int lptype; 6144 struct sockaddr *lsa = NULL; 6145 6146 stcb->asoc.peer_supports_asconf = 1; 6147 if (plen > sizeof(lstore)) { 6148 return (-23); 6149 } 6150 phdr = sctp_get_next_param(m, offset, 6151 (struct sctp_paramhdr *)&lstore, 6152 min(plen, sizeof(lstore))); 6153 if (phdr == NULL) { 6154 return (-24); 6155 } 6156 fee = (struct sctp_asconf_addr_param *)phdr; 6157 lptype = ntohs(fee->addrp.ph.param_type); 6158 if (lptype == SCTP_IPV4_ADDRESS) { 6159 if (plen != 6160 sizeof(struct sctp_asconf_addrv4_param)) { 6161 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6162 (int)sizeof(struct sctp_asconf_addrv4_param), 6163 plen); 6164 } else { 6165 fii = (struct sctp_asconf_addrv4_param *)fee; 6166 sin.sin_addr.s_addr = fii->addrp.addr; 6167 lsa = (struct sockaddr *)&sin; 6168 } 6169 } else if (lptype == SCTP_IPV6_ADDRESS) { 6170 if (plen != 6171 sizeof(struct sctp_asconf_addr_param)) { 6172 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6173 (int)sizeof(struct sctp_asconf_addr_param), 6174 plen); 6175 } else { 6176 memcpy(sin6.sin6_addr.s6_addr, 6177 fee->addrp.addr, 6178 sizeof(fee->addrp.addr)); 6179 lsa = (struct sockaddr *)&sin6; 6180 } 6181 } 6182 if (lsa) { 6183 (void)sctp_set_primary_addr(stcb, sa, NULL); 6184 } 6185 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6186 stcb->asoc.peer_supports_nat = 1; 6187 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6188 /* Peer supports pr-sctp */ 6189 stcb->asoc.peer_supports_prsctp = 1; 6190 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6191 /* A supported extension chunk */ 6192 struct sctp_supported_chunk_types_param *pr_supported; 6193 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6194 int num_ent, i; 6195 6196 phdr = sctp_get_next_param(m, offset, 6197 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6198 if (phdr == NULL) { 6199 return (-25); 6200 } 6201 stcb->asoc.peer_supports_asconf = 0; 6202 stcb->asoc.peer_supports_prsctp = 0; 6203 stcb->asoc.peer_supports_pktdrop = 0; 6204 stcb->asoc.peer_supports_strreset = 0; 6205 stcb->asoc.peer_supports_nr_sack = 0; 6206 stcb->asoc.peer_supports_auth = 0; 6207 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6208 num_ent = plen - sizeof(struct sctp_paramhdr); 6209 for (i = 0; i < num_ent; i++) { 6210 switch (pr_supported->chunk_types[i]) { 6211 case SCTP_ASCONF: 6212 case SCTP_ASCONF_ACK: 6213 stcb->asoc.peer_supports_asconf = 1; 6214 break; 6215 case SCTP_FORWARD_CUM_TSN: 6216 stcb->asoc.peer_supports_prsctp = 1; 6217 break; 6218 case SCTP_PACKET_DROPPED: 6219 stcb->asoc.peer_supports_pktdrop = 1; 6220 break; 6221 case SCTP_NR_SELECTIVE_ACK: 6222 if (SCTP_BASE_SYSCTL(sctp_nr_sack_on_off)) 6223 stcb->asoc.peer_supports_nr_sack = 1; 6224 else 6225 stcb->asoc.peer_supports_nr_sack = 0; 6226 break; 6227 case SCTP_STREAM_RESET: 6228 stcb->asoc.peer_supports_strreset = 1; 6229 break; 6230 case SCTP_AUTHENTICATION: 6231 stcb->asoc.peer_supports_auth = 1; 6232 break; 6233 default: 6234 /* one I have not learned yet */ 6235 break; 6236 6237 } 6238 } 6239 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 6240 /* Peer supports ECN-nonce */ 6241 stcb->asoc.peer_supports_ecn_nonce = 1; 6242 stcb->asoc.ecn_nonce_allowed = 1; 6243 } else if (ptype == SCTP_RANDOM) { 6244 if (plen > sizeof(random_store)) 6245 break; 6246 if (got_random) { 6247 /* already processed a RANDOM */ 6248 goto next_param; 6249 } 6250 phdr = sctp_get_next_param(m, offset, 6251 (struct sctp_paramhdr *)random_store, 6252 min(sizeof(random_store), plen)); 6253 if (phdr == NULL) 6254 return (-26); 6255 p_random = (struct sctp_auth_random *)phdr; 6256 random_len = plen - sizeof(*p_random); 6257 /* enforce the random length */ 6258 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6259 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6260 return (-27); 6261 } 6262 got_random = 1; 6263 } else if (ptype == SCTP_HMAC_LIST) { 6264 int num_hmacs; 6265 int i; 6266 6267 if (plen > sizeof(hmacs_store)) 6268 break; 6269 if (got_hmacs) { 6270 /* already processed a HMAC list */ 6271 goto next_param; 6272 } 6273 phdr = sctp_get_next_param(m, offset, 6274 (struct sctp_paramhdr *)hmacs_store, 6275 min(plen, sizeof(hmacs_store))); 6276 if (phdr == NULL) 6277 return (-28); 6278 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6279 hmacs_len = plen - sizeof(*hmacs); 6280 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6281 /* validate the hmac list */ 6282 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6283 return (-29); 6284 } 6285 if (stcb->asoc.peer_hmacs != NULL) 6286 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6287 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6288 if (stcb->asoc.peer_hmacs != NULL) { 6289 for (i = 0; i < num_hmacs; i++) { 6290 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6291 ntohs(hmacs->hmac_ids[i])); 6292 } 6293 } 6294 got_hmacs = 1; 6295 } else if (ptype == SCTP_CHUNK_LIST) { 6296 int i; 6297 6298 if (plen > sizeof(chunks_store)) 6299 break; 6300 if (got_chklist) { 6301 /* already processed a Chunks list */ 6302 goto next_param; 6303 } 6304 phdr = sctp_get_next_param(m, offset, 6305 (struct sctp_paramhdr *)chunks_store, 6306 min(plen, sizeof(chunks_store))); 6307 if (phdr == NULL) 6308 return (-30); 6309 chunks = (struct sctp_auth_chunk_list *)phdr; 6310 num_chunks = plen - sizeof(*chunks); 6311 if (stcb->asoc.peer_auth_chunks != NULL) 6312 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6313 else 6314 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6315 for (i = 0; i < num_chunks; i++) { 6316 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6317 stcb->asoc.peer_auth_chunks); 6318 /* record asconf/asconf-ack if listed */ 6319 if (chunks->chunk_types[i] == SCTP_ASCONF) 6320 saw_asconf = 1; 6321 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6322 saw_asconf_ack = 1; 6323 6324 } 6325 got_chklist = 1; 6326 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6327 (ptype == SCTP_STATE_COOKIE) || 6328 (ptype == SCTP_UNRECOG_PARAM) || 6329 (ptype == SCTP_COOKIE_PRESERVE) || 6330 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6331 (ptype == SCTP_ADD_IP_ADDRESS) || 6332 (ptype == SCTP_DEL_IP_ADDRESS) || 6333 (ptype == SCTP_ERROR_CAUSE_IND) || 6334 (ptype == SCTP_SUCCESS_REPORT)) { 6335 /* don't care */ ; 6336 } else { 6337 if ((ptype & 0x8000) == 0x0000) { 6338 /* 6339 * must stop processing the rest of the 6340 * param's. Any report bits were handled 6341 * with the call to 6342 * sctp_arethere_unrecognized_parameters() 6343 * when the INIT or INIT-ACK was first seen. 6344 */ 6345 break; 6346 } 6347 } 6348 6349 next_param: 6350 offset += SCTP_SIZE32(plen); 6351 if (offset >= limit) { 6352 break; 6353 } 6354 phdr = sctp_get_next_param(m, offset, &parm_buf, 6355 sizeof(parm_buf)); 6356 } 6357 /* Now check to see if we need to purge any addresses */ 6358 for (net = TAILQ_FIRST(&stcb->asoc.nets); net != NULL; net = net_tmp) { 6359 net_tmp = TAILQ_NEXT(net, sctp_next); 6360 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6361 SCTP_ADDR_NOT_IN_ASSOC) { 6362 /* This address has been removed from the asoc */ 6363 /* remove and free it */ 6364 stcb->asoc.numnets--; 6365 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6366 sctp_free_remote_addr(net); 6367 if (net == stcb->asoc.primary_destination) { 6368 stcb->asoc.primary_destination = NULL; 6369 sctp_select_primary_destination(stcb); 6370 } 6371 } 6372 } 6373 /* validate authentication required parameters */ 6374 if (got_random && got_hmacs) { 6375 stcb->asoc.peer_supports_auth = 1; 6376 } else { 6377 stcb->asoc.peer_supports_auth = 0; 6378 } 6379 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6380 /* peer does not support auth but sent a chunks list? */ 6381 return (-31); 6382 } 6383 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6384 !stcb->asoc.peer_supports_auth) { 6385 /* peer supports asconf but not auth? */ 6386 return (-32); 6387 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6388 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6389 return (-33); 6390 } 6391 /* concatenate the full random key */ 6392 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6393 if (chunks != NULL) { 6394 keylen += sizeof(*chunks) + num_chunks; 6395 } 6396 new_key = sctp_alloc_key(keylen); 6397 if (new_key != NULL) { 6398 /* copy in the RANDOM */ 6399 if (p_random != NULL) { 6400 keylen = sizeof(*p_random) + random_len; 6401 bcopy(p_random, new_key->key, keylen); 6402 } 6403 /* append in the AUTH chunks */ 6404 if (chunks != NULL) { 6405 bcopy(chunks, new_key->key + keylen, 6406 sizeof(*chunks) + num_chunks); 6407 keylen += sizeof(*chunks) + num_chunks; 6408 } 6409 /* append in the HMACs */ 6410 if (hmacs != NULL) { 6411 bcopy(hmacs, new_key->key + keylen, 6412 sizeof(*hmacs) + hmacs_len); 6413 } 6414 } else { 6415 /* failed to get memory for the key */ 6416 return (-34); 6417 } 6418 if (stcb->asoc.authinfo.peer_random != NULL) 6419 sctp_free_key(stcb->asoc.authinfo.peer_random); 6420 stcb->asoc.authinfo.peer_random = new_key; 6421 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6422 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6423 6424 return (0); 6425 } 6426 6427 int 6428 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6429 struct sctp_nets *net) 6430 { 6431 /* make sure the requested primary address exists in the assoc */ 6432 if (net == NULL && sa) 6433 net = sctp_findnet(stcb, sa); 6434 6435 if (net == NULL) { 6436 /* didn't find the requested primary address! */ 6437 return (-1); 6438 } else { 6439 /* set the primary address */ 6440 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6441 /* Must be confirmed, so queue to set */ 6442 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6443 return (0); 6444 } 6445 stcb->asoc.primary_destination = net; 6446 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 6447 net = TAILQ_FIRST(&stcb->asoc.nets); 6448 if (net != stcb->asoc.primary_destination) { 6449 /* 6450 * first one on the list is NOT the primary 6451 * sctp_cmpaddr() is much more efficent if the 6452 * primary is the first on the list, make it so. 6453 */ 6454 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6455 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6456 } 6457 return (0); 6458 } 6459 } 6460 6461 int 6462 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6463 { 6464 /* 6465 * This function serves two purposes. It will see if a TAG can be 6466 * re-used and return 1 for yes it is ok and 0 for don't use that 6467 * tag. A secondary function it will do is purge out old tags that 6468 * can be removed. 6469 */ 6470 struct sctpvtaghead *chain; 6471 struct sctp_tagblock *twait_block; 6472 struct sctpasochead *head; 6473 struct sctp_tcb *stcb; 6474 int i; 6475 6476 SCTP_INP_INFO_RLOCK(); 6477 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6478 SCTP_BASE_INFO(hashasocmark))]; 6479 if (head == NULL) { 6480 /* invalid vtag */ 6481 goto skip_vtag_check; 6482 } 6483 LIST_FOREACH(stcb, head, sctp_asocs) { 6484 /* 6485 * We choose not to lock anything here. TCB's can't be 6486 * removed since we have the read lock, so they can't be 6487 * freed on us, same thing for the INP. I may be wrong with 6488 * this assumption, but we will go with it for now :-) 6489 */ 6490 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6491 continue; 6492 } 6493 if (stcb->asoc.my_vtag == tag) { 6494 /* candidate */ 6495 if (stcb->rport != rport) { 6496 continue; 6497 } 6498 if (stcb->sctp_ep->sctp_lport != lport) { 6499 continue; 6500 } 6501 /* Its a used tag set */ 6502 SCTP_INP_INFO_RUNLOCK(); 6503 return (0); 6504 } 6505 } 6506 skip_vtag_check: 6507 6508 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6509 /* Now what about timed wait ? */ 6510 if (!LIST_EMPTY(chain)) { 6511 /* 6512 * Block(s) are present, lets see if we have this tag in the 6513 * list 6514 */ 6515 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6516 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6517 if (twait_block->vtag_block[i].v_tag == 0) { 6518 /* not used */ 6519 continue; 6520 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6521 now->tv_sec) { 6522 /* Audit expires this guy */ 6523 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6524 twait_block->vtag_block[i].v_tag = 0; 6525 twait_block->vtag_block[i].lport = 0; 6526 twait_block->vtag_block[i].rport = 0; 6527 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6528 (twait_block->vtag_block[i].lport == lport) && 6529 (twait_block->vtag_block[i].rport == rport)) { 6530 /* Bad tag, sorry :< */ 6531 SCTP_INP_INFO_RUNLOCK(); 6532 return (0); 6533 } 6534 } 6535 } 6536 } 6537 SCTP_INP_INFO_RUNLOCK(); 6538 return (1); 6539 } 6540 6541 6542 static sctp_assoc_t reneged_asoc_ids[256]; 6543 static uint8_t reneged_at = 0; 6544 6545 6546 static void 6547 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6548 { 6549 /* 6550 * We must hunt this association for MBUF's past the cumack (i.e. 6551 * out of order data that we can renege on). 6552 */ 6553 struct sctp_association *asoc; 6554 struct sctp_tmit_chunk *chk, *nchk; 6555 uint32_t cumulative_tsn_p1; 6556 struct sctp_queued_to_read *ctl, *nctl; 6557 int cnt, strmat; 6558 uint32_t gap, i; 6559 int fnd = 0; 6560 6561 /* We look for anything larger than the cum-ack + 1 */ 6562 6563 asoc = &stcb->asoc; 6564 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6565 /* none we can reneg on. */ 6566 return; 6567 } 6568 SCTP_STAT_INCR(sctps_protocol_drains_done); 6569 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6570 cnt = 0; 6571 /* First look in the re-assembly queue */ 6572 chk = TAILQ_FIRST(&asoc->reasmqueue); 6573 while (chk) { 6574 /* Get the next one */ 6575 nchk = TAILQ_NEXT(chk, sctp_next); 6576 if (compare_with_wrap(chk->rec.data.TSN_seq, 6577 cumulative_tsn_p1, MAX_TSN)) { 6578 /* Yep it is above cum-ack */ 6579 cnt++; 6580 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6581 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6582 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6583 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6584 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6585 if (chk->data) { 6586 sctp_m_freem(chk->data); 6587 chk->data = NULL; 6588 } 6589 sctp_free_a_chunk(stcb, chk); 6590 } 6591 chk = nchk; 6592 } 6593 /* Ok that was fun, now we will drain all the inbound streams? */ 6594 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6595 ctl = TAILQ_FIRST(&asoc->strmin[strmat].inqueue); 6596 while (ctl) { 6597 nctl = TAILQ_NEXT(ctl, next); 6598 if (compare_with_wrap(ctl->sinfo_tsn, 6599 cumulative_tsn_p1, MAX_TSN)) { 6600 /* Yep it is above cum-ack */ 6601 cnt++; 6602 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6603 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6604 sctp_ucount_decr(asoc->cnt_on_all_streams); 6605 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6606 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6607 if (ctl->data) { 6608 sctp_m_freem(ctl->data); 6609 ctl->data = NULL; 6610 } 6611 sctp_free_remote_addr(ctl->whoFrom); 6612 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6613 SCTP_DECR_READQ_COUNT(); 6614 } 6615 ctl = nctl; 6616 } 6617 } 6618 if (cnt) { 6619 /* We must back down to see what the new highest is */ 6620 for (i = asoc->highest_tsn_inside_map; 6621 (compare_with_wrap(i, asoc->mapping_array_base_tsn, MAX_TSN) || (i == asoc->mapping_array_base_tsn)); 6622 i--) { 6623 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6624 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6625 asoc->highest_tsn_inside_map = i; 6626 fnd = 1; 6627 break; 6628 } 6629 } 6630 if (!fnd) { 6631 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6632 } 6633 /* 6634 * Question, should we go through the delivery queue? The 6635 * only reason things are on here is the app not reading OR 6636 * a p-d-api up. An attacker COULD send enough in to 6637 * initiate the PD-API and then send a bunch of stuff to 6638 * other streams... these would wind up on the delivery 6639 * queue.. and then we would not get to them. But in order 6640 * to do this I then have to back-track and un-deliver 6641 * sequence numbers in streams.. el-yucko. I think for now 6642 * we will NOT look at the delivery queue and leave it to be 6643 * something to consider later. An alternative would be to 6644 * abort the P-D-API with a notification and then deliver 6645 * the data.... Or another method might be to keep track of 6646 * how many times the situation occurs and if we see a 6647 * possible attack underway just abort the association. 6648 */ 6649 #ifdef SCTP_DEBUG 6650 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6651 #endif 6652 /* 6653 * Now do we need to find a new 6654 * asoc->highest_tsn_inside_map? 6655 */ 6656 asoc->last_revoke_count = cnt; 6657 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6658 /* sa_ignore NO_NULL_CHK */ 6659 sctp_send_sack(stcb); 6660 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6661 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 6662 reneged_at++; 6663 } 6664 /* 6665 * Another issue, in un-setting the TSN's in the mapping array we 6666 * DID NOT adjust the higest_tsn marker. This will cause one of two 6667 * things to occur. It may cause us to do extra work in checking for 6668 * our mapping array movement. More importantly it may cause us to 6669 * SACK every datagram. This may not be a bad thing though since we 6670 * will recover once we get our cum-ack above and all this stuff we 6671 * dumped recovered. 6672 */ 6673 } 6674 6675 void 6676 sctp_drain() 6677 { 6678 /* 6679 * We must walk the PCB lists for ALL associations here. The system 6680 * is LOW on MBUF's and needs help. This is where reneging will 6681 * occur. We really hope this does NOT happen! 6682 */ 6683 VNET_ITERATOR_DECL(vnet_iter); 6684 VNET_LIST_RLOCK_NOSLEEP(); 6685 VNET_FOREACH(vnet_iter) { 6686 CURVNET_SET(vnet_iter); 6687 struct sctp_inpcb *inp; 6688 struct sctp_tcb *stcb; 6689 6690 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6691 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6692 #ifdef VIMAGE 6693 continue; 6694 #else 6695 return; 6696 #endif 6697 } 6698 SCTP_INP_INFO_RLOCK(); 6699 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6700 /* For each endpoint */ 6701 SCTP_INP_RLOCK(inp); 6702 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6703 /* For each association */ 6704 SCTP_TCB_LOCK(stcb); 6705 sctp_drain_mbufs(inp, stcb); 6706 SCTP_TCB_UNLOCK(stcb); 6707 } 6708 SCTP_INP_RUNLOCK(inp); 6709 } 6710 SCTP_INP_INFO_RUNLOCK(); 6711 CURVNET_RESTORE(); 6712 } 6713 VNET_LIST_RUNLOCK_NOSLEEP(); 6714 } 6715 6716 /* 6717 * start a new iterator 6718 * iterates through all endpoints and associations based on the pcb_state 6719 * flags and asoc_state. "af" (mandatory) is executed for all matching 6720 * assocs and "ef" (optional) is executed when the iterator completes. 6721 * "inpf" (optional) is executed for each new endpoint as it is being 6722 * iterated through. inpe (optional) is called when the inp completes 6723 * its way through all the stcbs. 6724 */ 6725 int 6726 sctp_initiate_iterator(inp_func inpf, 6727 asoc_func af, 6728 inp_func inpe, 6729 uint32_t pcb_state, 6730 uint32_t pcb_features, 6731 uint32_t asoc_state, 6732 void *argp, 6733 uint32_t argi, 6734 end_func ef, 6735 struct sctp_inpcb *s_inp, 6736 uint8_t chunk_output_off) 6737 { 6738 struct sctp_iterator *it = NULL; 6739 6740 if (af == NULL) { 6741 return (-1); 6742 } 6743 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6744 SCTP_M_ITER); 6745 if (it == NULL) { 6746 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6747 return (ENOMEM); 6748 } 6749 memset(it, 0, sizeof(*it)); 6750 it->function_assoc = af; 6751 it->function_inp = inpf; 6752 if (inpf) 6753 it->done_current_ep = 0; 6754 else 6755 it->done_current_ep = 1; 6756 it->function_atend = ef; 6757 it->pointer = argp; 6758 it->val = argi; 6759 it->pcb_flags = pcb_state; 6760 it->pcb_features = pcb_features; 6761 it->asoc_state = asoc_state; 6762 it->function_inp_end = inpe; 6763 it->no_chunk_output = chunk_output_off; 6764 it->vn = curvnet; 6765 if (s_inp) { 6766 /* Assume lock is held here */ 6767 it->inp = s_inp; 6768 SCTP_INP_INCR_REF(it->inp); 6769 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6770 } else { 6771 SCTP_INP_INFO_RLOCK(); 6772 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6773 if (it->inp) { 6774 SCTP_INP_INCR_REF(it->inp); 6775 } 6776 SCTP_INP_INFO_RUNLOCK(); 6777 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6778 6779 } 6780 SCTP_IPI_ITERATOR_WQ_LOCK(); 6781 6782 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6783 if (sctp_it_ctl.iterator_running == 0) { 6784 sctp_wakeup_iterator(); 6785 } 6786 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6787 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6788 return (0); 6789 } 6790