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/sctp_dtrace_define.h> 49 #include <netinet/udp.h> 50 51 52 VNET_DEFINE(struct sctp_base_info, system_base_info); 53 54 /* FIX: we don't handle multiple link local scopes */ 55 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 56 #ifdef INET6 57 int 58 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 59 { 60 struct sockaddr_in6 tmp_a, tmp_b; 61 62 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 63 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 64 return 0; 65 } 66 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 67 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 68 return 0; 69 } 70 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 71 } 72 73 #endif 74 75 void 76 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 77 { 78 /* 79 * We really don't need to lock this, but I will just because it 80 * does not hurt. 81 */ 82 SCTP_INP_INFO_RLOCK(); 83 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 84 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 85 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 86 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 87 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 88 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 89 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 90 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 91 92 SCTP_INP_INFO_RUNLOCK(); 93 } 94 95 /* 96 * Addresses are added to VRF's (Virtual Router's). For BSD we 97 * have only the default VRF 0. We maintain a hash list of 98 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 99 * these has a list of addresses. When we add a new address 100 * to a VRF we lookup the ifn/ifn_index, if the ifn does 101 * not exist we create it and add it to the list of IFN's 102 * within the VRF. Once we have the sctp_ifn, we add the 103 * address to the list. So we look something like: 104 * 105 * hash-vrf-table 106 * vrf-> ifn-> ifn -> ifn 107 * vrf | 108 * ... +--ifa-> ifa -> ifa 109 * vrf 110 * 111 * We keep these separate lists since the SCTP subsystem will 112 * point to these from its source address selection nets structure. 113 * When an address is deleted it does not happen right away on 114 * the SCTP side, it gets scheduled. What we do when a 115 * delete happens is immediately remove the address from 116 * the master list and decrement the refcount. As our 117 * addip iterator works through and frees the src address 118 * selection pointing to the sctp_ifa, eventually the refcount 119 * will reach 0 and we will delete it. Note that it is assumed 120 * that any locking on system level ifn/ifa is done at the 121 * caller of these functions and these routines will only 122 * lock the SCTP structures as they add or delete things. 123 * 124 * Other notes on VRF concepts. 125 * - An endpoint can be in multiple VRF's 126 * - An association lives within a VRF and only one VRF. 127 * - Any incoming packet we can deduce the VRF for by 128 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 129 * - Any downward send call or connect call must supply the 130 * VRF via ancillary data or via some sort of set default 131 * VRF socket option call (again for BSD no brainer since 132 * the VRF is always 0). 133 * - An endpoint may add multiple VRF's to it. 134 * - Listening sockets can accept associations in any 135 * of the VRF's they are in but the assoc will end up 136 * in only one VRF (gotten from the packet or connect/send). 137 * 138 */ 139 140 struct sctp_vrf * 141 sctp_allocate_vrf(int vrf_id) 142 { 143 struct sctp_vrf *vrf = NULL; 144 struct sctp_vrflist *bucket; 145 146 /* First allocate the VRF structure */ 147 vrf = sctp_find_vrf(vrf_id); 148 if (vrf) { 149 /* Already allocated */ 150 return (vrf); 151 } 152 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 153 SCTP_M_VRF); 154 if (vrf == NULL) { 155 /* No memory */ 156 #ifdef INVARIANTS 157 panic("No memory for VRF:%d", vrf_id); 158 #endif 159 return (NULL); 160 } 161 /* setup the VRF */ 162 memset(vrf, 0, sizeof(struct sctp_vrf)); 163 vrf->vrf_id = vrf_id; 164 LIST_INIT(&vrf->ifnlist); 165 vrf->total_ifa_count = 0; 166 vrf->refcount = 0; 167 /* now also setup table ids */ 168 SCTP_INIT_VRF_TABLEID(vrf); 169 /* Init the HASH of addresses */ 170 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 171 &vrf->vrf_addr_hashmark); 172 if (vrf->vrf_addr_hash == NULL) { 173 /* No memory */ 174 #ifdef INVARIANTS 175 panic("No memory for VRF:%d", vrf_id); 176 #endif 177 SCTP_FREE(vrf, SCTP_M_VRF); 178 return (NULL); 179 } 180 /* Add it to the hash table */ 181 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 182 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 183 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 184 return (vrf); 185 } 186 187 188 struct sctp_ifn * 189 sctp_find_ifn(void *ifn, uint32_t ifn_index) 190 { 191 struct sctp_ifn *sctp_ifnp; 192 struct sctp_ifnlist *hash_ifn_head; 193 194 /* 195 * We assume the lock is held for the addresses if that's wrong 196 * problems could occur :-) 197 */ 198 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 199 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 200 if (sctp_ifnp->ifn_index == ifn_index) { 201 return (sctp_ifnp); 202 } 203 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 204 return (sctp_ifnp); 205 } 206 } 207 return (NULL); 208 } 209 210 211 212 struct sctp_vrf * 213 sctp_find_vrf(uint32_t vrf_id) 214 { 215 struct sctp_vrflist *bucket; 216 struct sctp_vrf *liste; 217 218 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 219 LIST_FOREACH(liste, bucket, next_vrf) { 220 if (vrf_id == liste->vrf_id) { 221 return (liste); 222 } 223 } 224 return (NULL); 225 } 226 227 void 228 sctp_free_vrf(struct sctp_vrf *vrf) 229 { 230 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 231 if (vrf->vrf_addr_hash) { 232 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 233 vrf->vrf_addr_hash = NULL; 234 } 235 /* We zero'd the count */ 236 LIST_REMOVE(vrf, next_vrf); 237 SCTP_FREE(vrf, SCTP_M_VRF); 238 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 239 } 240 } 241 242 void 243 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 244 { 245 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 246 /* We zero'd the count */ 247 if (sctp_ifnp->vrf) { 248 sctp_free_vrf(sctp_ifnp->vrf); 249 } 250 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 251 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 252 } 253 } 254 255 void 256 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 257 { 258 struct sctp_ifn *sctp_ifnp; 259 260 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 261 if (sctp_ifnp != NULL) { 262 sctp_ifnp->ifn_mtu = mtu; 263 } 264 } 265 266 267 void 268 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 269 { 270 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 271 /* We zero'd the count */ 272 if (sctp_ifap->ifn_p) { 273 sctp_free_ifn(sctp_ifap->ifn_p); 274 } 275 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 276 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 277 } 278 } 279 280 static void 281 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 282 { 283 struct sctp_ifn *found; 284 285 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 286 if (found == NULL) { 287 /* Not in the list.. sorry */ 288 return; 289 } 290 if (hold_addr_lock == 0) 291 SCTP_IPI_ADDR_WLOCK(); 292 LIST_REMOVE(sctp_ifnp, next_bucket); 293 LIST_REMOVE(sctp_ifnp, next_ifn); 294 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 295 sctp_ifnp->registered_af); 296 if (hold_addr_lock == 0) 297 SCTP_IPI_ADDR_WUNLOCK(); 298 /* Take away the reference, and possibly free it */ 299 sctp_free_ifn(sctp_ifnp); 300 } 301 302 void 303 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 304 const char *if_name, uint32_t ifn_index) 305 { 306 struct sctp_vrf *vrf; 307 struct sctp_ifa *sctp_ifap = NULL; 308 309 SCTP_IPI_ADDR_RLOCK(); 310 vrf = sctp_find_vrf(vrf_id); 311 if (vrf == NULL) { 312 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 313 goto out; 314 315 } 316 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 317 if (sctp_ifap == NULL) { 318 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 319 goto out; 320 } 321 if (sctp_ifap->ifn_p == NULL) { 322 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 323 goto out; 324 } 325 if (if_name) { 326 int len1, len2; 327 328 len1 = strlen(if_name); 329 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 330 if (len1 != len2) { 331 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n", 332 len1, len2); 333 goto out; 334 } 335 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 336 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 337 sctp_ifap->ifn_p->ifn_name, 338 if_name); 339 goto out; 340 } 341 } else { 342 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 343 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 344 sctp_ifap->ifn_p->ifn_index, ifn_index); 345 goto out; 346 } 347 } 348 349 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 350 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 351 out: 352 SCTP_IPI_ADDR_RUNLOCK(); 353 } 354 355 void 356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 357 const char *if_name, uint32_t ifn_index) 358 { 359 struct sctp_vrf *vrf; 360 struct sctp_ifa *sctp_ifap = NULL; 361 362 SCTP_IPI_ADDR_RLOCK(); 363 vrf = sctp_find_vrf(vrf_id); 364 if (vrf == NULL) { 365 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 366 goto out; 367 368 } 369 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 370 if (sctp_ifap == NULL) { 371 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 372 goto out; 373 } 374 if (sctp_ifap->ifn_p == NULL) { 375 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 376 goto out; 377 } 378 if (if_name) { 379 int len1, len2; 380 381 len1 = strlen(if_name); 382 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 383 if (len1 != len2) { 384 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n", 385 len1, len2); 386 goto out; 387 } 388 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 389 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 390 sctp_ifap->ifn_p->ifn_name, 391 if_name); 392 goto out; 393 } 394 } else { 395 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 396 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 397 sctp_ifap->ifn_p->ifn_index, ifn_index); 398 goto out; 399 } 400 } 401 402 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 403 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 404 out: 405 SCTP_IPI_ADDR_RUNLOCK(); 406 } 407 408 /*- 409 * Add an ifa to an ifn. 410 * Register the interface as necessary. 411 * NOTE: ADDR write lock MUST be held. 412 */ 413 static void 414 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 415 { 416 int ifa_af; 417 418 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 419 sctp_ifap->ifn_p = sctp_ifnp; 420 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 421 /* update address counts */ 422 sctp_ifnp->ifa_count++; 423 ifa_af = sctp_ifap->address.sa.sa_family; 424 if (ifa_af == AF_INET) 425 sctp_ifnp->num_v4++; 426 else 427 sctp_ifnp->num_v6++; 428 if (sctp_ifnp->ifa_count == 1) { 429 /* register the new interface */ 430 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 431 sctp_ifnp->registered_af = ifa_af; 432 } 433 } 434 435 /*- 436 * Remove an ifa from its ifn. 437 * If no more addresses exist, remove the ifn too. Otherwise, re-register 438 * the interface based on the remaining address families left. 439 * NOTE: ADDR write lock MUST be held. 440 */ 441 static void 442 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 443 { 444 uint32_t ifn_index; 445 446 LIST_REMOVE(sctp_ifap, next_ifa); 447 if (sctp_ifap->ifn_p) { 448 /* update address counts */ 449 sctp_ifap->ifn_p->ifa_count--; 450 if (sctp_ifap->address.sa.sa_family == AF_INET6) 451 sctp_ifap->ifn_p->num_v6--; 452 else if (sctp_ifap->address.sa.sa_family == AF_INET) 453 sctp_ifap->ifn_p->num_v4--; 454 455 ifn_index = sctp_ifap->ifn_p->ifn_index; 456 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 457 /* remove the ifn, possibly freeing it */ 458 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 459 } else { 460 /* re-register address family type, if needed */ 461 if ((sctp_ifap->ifn_p->num_v6 == 0) && 462 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 463 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6); 464 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET); 465 sctp_ifap->ifn_p->registered_af = AF_INET; 466 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 467 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 468 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET); 469 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6); 470 sctp_ifap->ifn_p->registered_af = AF_INET6; 471 } 472 /* free the ifn refcount */ 473 sctp_free_ifn(sctp_ifap->ifn_p); 474 } 475 sctp_ifap->ifn_p = NULL; 476 } 477 } 478 479 struct sctp_ifa * 480 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 481 uint32_t ifn_type, const char *if_name, void *ifa, 482 struct sockaddr *addr, uint32_t ifa_flags, 483 int dynamic_add) 484 { 485 struct sctp_vrf *vrf; 486 struct sctp_ifn *sctp_ifnp = NULL; 487 struct sctp_ifa *sctp_ifap = NULL; 488 struct sctp_ifalist *hash_addr_head; 489 struct sctp_ifnlist *hash_ifn_head; 490 uint32_t hash_of_addr; 491 int new_ifn_af = 0; 492 493 #ifdef SCTP_DEBUG 494 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 495 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 496 #endif 497 SCTP_IPI_ADDR_WLOCK(); 498 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 499 if (sctp_ifnp) { 500 vrf = sctp_ifnp->vrf; 501 } else { 502 vrf = sctp_find_vrf(vrf_id); 503 if (vrf == NULL) { 504 vrf = sctp_allocate_vrf(vrf_id); 505 if (vrf == NULL) { 506 SCTP_IPI_ADDR_WUNLOCK(); 507 return (NULL); 508 } 509 } 510 } 511 if (sctp_ifnp == NULL) { 512 /* 513 * build one and add it, can't hold lock until after malloc 514 * done though. 515 */ 516 SCTP_IPI_ADDR_WUNLOCK(); 517 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 518 sizeof(struct sctp_ifn), SCTP_M_IFN); 519 if (sctp_ifnp == NULL) { 520 #ifdef INVARIANTS 521 panic("No memory for IFN"); 522 #endif 523 return (NULL); 524 } 525 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 526 sctp_ifnp->ifn_index = ifn_index; 527 sctp_ifnp->ifn_p = ifn; 528 sctp_ifnp->ifn_type = ifn_type; 529 sctp_ifnp->refcount = 0; 530 sctp_ifnp->vrf = vrf; 531 atomic_add_int(&vrf->refcount, 1); 532 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 533 if (if_name != NULL) { 534 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ); 535 } else { 536 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ)); 537 } 538 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 539 LIST_INIT(&sctp_ifnp->ifalist); 540 SCTP_IPI_ADDR_WLOCK(); 541 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 542 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 543 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 544 new_ifn_af = 1; 545 } 546 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 547 if (sctp_ifap) { 548 /* Hmm, it already exists? */ 549 if ((sctp_ifap->ifn_p) && 550 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 551 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 552 sctp_ifap->ifn_p->ifn_name, ifn_index, 553 sctp_ifap); 554 if (new_ifn_af) { 555 /* Remove the created one that we don't want */ 556 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 557 } 558 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 559 /* easy to solve, just switch back to active */ 560 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 561 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 562 sctp_ifap->ifn_p = sctp_ifnp; 563 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 564 } 565 exit_stage_left: 566 SCTP_IPI_ADDR_WUNLOCK(); 567 return (sctp_ifap); 568 } else { 569 if (sctp_ifap->ifn_p) { 570 /* 571 * The last IFN gets the address, remove the 572 * old one 573 */ 574 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 575 sctp_ifap, sctp_ifap->ifn_p->ifn_name, 576 sctp_ifap->ifn_p->ifn_index, if_name, 577 ifn_index); 578 /* remove the address from the old ifn */ 579 sctp_remove_ifa_from_ifn(sctp_ifap); 580 /* move the address over to the new ifn */ 581 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 582 goto exit_stage_left; 583 } else { 584 /* repair ifnp which was NULL ? */ 585 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 586 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 587 sctp_ifnp, sctp_ifap); 588 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 589 } 590 goto exit_stage_left; 591 } 592 } 593 SCTP_IPI_ADDR_WUNLOCK(); 594 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 595 if (sctp_ifap == NULL) { 596 #ifdef INVARIANTS 597 panic("No memory for IFA"); 598 #endif 599 return (NULL); 600 } 601 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 602 sctp_ifap->ifn_p = sctp_ifnp; 603 atomic_add_int(&sctp_ifnp->refcount, 1); 604 sctp_ifap->vrf_id = vrf_id; 605 sctp_ifap->ifa = ifa; 606 memcpy(&sctp_ifap->address, addr, addr->sa_len); 607 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 608 sctp_ifap->flags = ifa_flags; 609 /* Set scope */ 610 switch (sctp_ifap->address.sa.sa_family) { 611 case AF_INET: 612 { 613 struct sockaddr_in *sin; 614 615 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 616 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 617 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 618 sctp_ifap->src_is_loop = 1; 619 } 620 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 621 sctp_ifap->src_is_priv = 1; 622 } 623 sctp_ifnp->num_v4++; 624 if (new_ifn_af) 625 new_ifn_af = AF_INET; 626 break; 627 } 628 #ifdef INET6 629 case AF_INET6: 630 { 631 /* ok to use deprecated addresses? */ 632 struct sockaddr_in6 *sin6; 633 634 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 635 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 636 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 637 sctp_ifap->src_is_loop = 1; 638 } 639 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 640 sctp_ifap->src_is_priv = 1; 641 } 642 sctp_ifnp->num_v6++; 643 if (new_ifn_af) 644 new_ifn_af = AF_INET6; 645 break; 646 } 647 #endif 648 default: 649 new_ifn_af = 0; 650 break; 651 } 652 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 653 654 if ((sctp_ifap->src_is_priv == 0) && 655 (sctp_ifap->src_is_loop == 0)) { 656 sctp_ifap->src_is_glob = 1; 657 } 658 SCTP_IPI_ADDR_WLOCK(); 659 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 660 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 661 sctp_ifap->refcount = 1; 662 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 663 sctp_ifnp->ifa_count++; 664 vrf->total_ifa_count++; 665 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 666 if (new_ifn_af) { 667 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 668 sctp_ifnp->registered_af = new_ifn_af; 669 } 670 SCTP_IPI_ADDR_WUNLOCK(); 671 if (dynamic_add) { 672 /* 673 * Bump up the refcount so that when the timer completes it 674 * will drop back down. 675 */ 676 struct sctp_laddr *wi; 677 678 atomic_add_int(&sctp_ifap->refcount, 1); 679 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 680 if (wi == NULL) { 681 /* 682 * Gak, what can we do? We have lost an address 683 * change can you say HOSED? 684 */ 685 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 686 /* Opps, must decrement the count */ 687 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 688 if_name); 689 return (NULL); 690 } 691 SCTP_INCR_LADDR_COUNT(); 692 bzero(wi, sizeof(*wi)); 693 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 694 wi->ifa = sctp_ifap; 695 wi->action = SCTP_ADD_IP_ADDRESS; 696 697 SCTP_WQ_ADDR_LOCK(); 698 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 699 SCTP_WQ_ADDR_UNLOCK(); 700 701 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 702 (struct sctp_inpcb *)NULL, 703 (struct sctp_tcb *)NULL, 704 (struct sctp_nets *)NULL); 705 } else { 706 /* it's ready for use */ 707 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 708 } 709 return (sctp_ifap); 710 } 711 712 void 713 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 714 uint32_t ifn_index, const char *if_name) 715 { 716 struct sctp_vrf *vrf; 717 struct sctp_ifa *sctp_ifap = NULL; 718 719 SCTP_IPI_ADDR_WLOCK(); 720 vrf = sctp_find_vrf(vrf_id); 721 if (vrf == NULL) { 722 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 723 goto out_now; 724 } 725 #ifdef SCTP_DEBUG 726 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 727 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 728 #endif 729 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 730 if (sctp_ifap) { 731 /* Validate the delete */ 732 if (sctp_ifap->ifn_p) { 733 int valid = 0; 734 735 /*- 736 * The name has priority over the ifn_index 737 * if its given. We do this especially for 738 * panda who might recycle indexes fast. 739 */ 740 if (if_name) { 741 int len1, len2; 742 743 len1 = min(SCTP_IFNAMSIZ, strlen(if_name)); 744 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name)); 745 if (len1 && len2 && (len1 == len2)) { 746 /* we can compare them */ 747 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) { 748 /* 749 * They match its a correct 750 * delete 751 */ 752 valid = 1; 753 } 754 } 755 } 756 if (!valid) { 757 /* last ditch check ifn_index */ 758 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 759 valid = 1; 760 } 761 } 762 if (!valid) { 763 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 764 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 765 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 766 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 767 SCTP_IPI_ADDR_WUNLOCK(); 768 return; 769 } 770 } 771 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap); 772 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 773 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 774 vrf->total_ifa_count--; 775 LIST_REMOVE(sctp_ifap, next_bucket); 776 sctp_remove_ifa_from_ifn(sctp_ifap); 777 } 778 #ifdef SCTP_DEBUG 779 else { 780 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 781 ifn_index); 782 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 783 } 784 #endif 785 786 out_now: 787 SCTP_IPI_ADDR_WUNLOCK(); 788 if (sctp_ifap) { 789 struct sctp_laddr *wi; 790 791 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 792 if (wi == NULL) { 793 /* 794 * Gak, what can we do? We have lost an address 795 * change can you say HOSED? 796 */ 797 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 798 799 /* Oops, must decrement the count */ 800 sctp_free_ifa(sctp_ifap); 801 return; 802 } 803 SCTP_INCR_LADDR_COUNT(); 804 bzero(wi, sizeof(*wi)); 805 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 806 wi->ifa = sctp_ifap; 807 wi->action = SCTP_DEL_IP_ADDRESS; 808 SCTP_WQ_ADDR_LOCK(); 809 /* 810 * Should this really be a tailq? As it is we will process 811 * the newest first :-0 812 */ 813 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 814 SCTP_WQ_ADDR_UNLOCK(); 815 816 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 817 (struct sctp_inpcb *)NULL, 818 (struct sctp_tcb *)NULL, 819 (struct sctp_nets *)NULL); 820 } 821 return; 822 } 823 824 825 static struct sctp_tcb * 826 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 827 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 828 { 829 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 830 /* 831 * If we support the TCP model, then we must now dig through to see 832 * if we can find our endpoint in the list of tcp ep's. 833 */ 834 uint16_t lport, rport; 835 struct sctppcbhead *ephead; 836 struct sctp_inpcb *inp; 837 struct sctp_laddr *laddr; 838 struct sctp_tcb *stcb; 839 struct sctp_nets *net; 840 841 if ((to == NULL) || (from == NULL)) { 842 return (NULL); 843 } 844 if (to->sa_family == AF_INET && from->sa_family == AF_INET) { 845 lport = ((struct sockaddr_in *)to)->sin_port; 846 rport = ((struct sockaddr_in *)from)->sin_port; 847 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) { 848 lport = ((struct sockaddr_in6 *)to)->sin6_port; 849 rport = ((struct sockaddr_in6 *)from)->sin6_port; 850 } else { 851 return NULL; 852 } 853 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 854 /* 855 * Ok now for each of the guys in this bucket we must look and see: 856 * - Does the remote port match. - Does there single association's 857 * addresses match this address (to). If so we update p_ep to point 858 * to this ep and return the tcb from it. 859 */ 860 LIST_FOREACH(inp, ephead, sctp_hash) { 861 SCTP_INP_RLOCK(inp); 862 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 863 SCTP_INP_RUNLOCK(inp); 864 continue; 865 } 866 if (lport != inp->sctp_lport) { 867 SCTP_INP_RUNLOCK(inp); 868 continue; 869 } 870 if (inp->def_vrf_id != vrf_id) { 871 SCTP_INP_RUNLOCK(inp); 872 continue; 873 } 874 /* check to see if the ep has one of the addresses */ 875 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 876 /* We are NOT bound all, so look further */ 877 int match = 0; 878 879 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 880 881 if (laddr->ifa == NULL) { 882 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 883 continue; 884 } 885 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 886 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 887 continue; 888 } 889 if (laddr->ifa->address.sa.sa_family == 890 to->sa_family) { 891 /* see if it matches */ 892 struct sockaddr_in *intf_addr, *sin; 893 894 intf_addr = &laddr->ifa->address.sin; 895 sin = (struct sockaddr_in *)to; 896 if (from->sa_family == AF_INET) { 897 if (sin->sin_addr.s_addr == 898 intf_addr->sin_addr.s_addr) { 899 match = 1; 900 break; 901 } 902 } 903 #ifdef INET6 904 if (from->sa_family == AF_INET6) { 905 struct sockaddr_in6 *intf_addr6; 906 struct sockaddr_in6 *sin6; 907 908 sin6 = (struct sockaddr_in6 *) 909 to; 910 intf_addr6 = &laddr->ifa->address.sin6; 911 912 if (SCTP6_ARE_ADDR_EQUAL(sin6, 913 intf_addr6)) { 914 match = 1; 915 break; 916 } 917 } 918 #endif 919 } 920 } 921 if (match == 0) { 922 /* This endpoint does not have this address */ 923 SCTP_INP_RUNLOCK(inp); 924 continue; 925 } 926 } 927 /* 928 * Ok if we hit here the ep has the address, does it hold 929 * the tcb? 930 */ 931 932 stcb = LIST_FIRST(&inp->sctp_asoc_list); 933 if (stcb == NULL) { 934 SCTP_INP_RUNLOCK(inp); 935 continue; 936 } 937 SCTP_TCB_LOCK(stcb); 938 if (stcb->rport != rport) { 939 /* remote port does not match. */ 940 SCTP_TCB_UNLOCK(stcb); 941 SCTP_INP_RUNLOCK(inp); 942 continue; 943 } 944 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 945 SCTP_TCB_UNLOCK(stcb); 946 SCTP_INP_RUNLOCK(inp); 947 continue; 948 } 949 /* Does this TCB have a matching address? */ 950 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 951 952 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 953 /* not the same family, can't be a match */ 954 continue; 955 } 956 switch (from->sa_family) { 957 case AF_INET: 958 { 959 struct sockaddr_in *sin, *rsin; 960 961 sin = (struct sockaddr_in *)&net->ro._l_addr; 962 rsin = (struct sockaddr_in *)from; 963 if (sin->sin_addr.s_addr == 964 rsin->sin_addr.s_addr) { 965 /* found it */ 966 if (netp != NULL) { 967 *netp = net; 968 } 969 /* 970 * Update the endpoint 971 * pointer 972 */ 973 *inp_p = inp; 974 SCTP_INP_RUNLOCK(inp); 975 return (stcb); 976 } 977 break; 978 } 979 #ifdef INET6 980 case AF_INET6: 981 { 982 struct sockaddr_in6 *sin6, *rsin6; 983 984 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 985 rsin6 = (struct sockaddr_in6 *)from; 986 if (SCTP6_ARE_ADDR_EQUAL(sin6, 987 rsin6)) { 988 /* found it */ 989 if (netp != NULL) { 990 *netp = net; 991 } 992 /* 993 * Update the endpoint 994 * pointer 995 */ 996 *inp_p = inp; 997 SCTP_INP_RUNLOCK(inp); 998 return (stcb); 999 } 1000 break; 1001 } 1002 #endif 1003 default: 1004 /* TSNH */ 1005 break; 1006 } 1007 } 1008 SCTP_TCB_UNLOCK(stcb); 1009 SCTP_INP_RUNLOCK(inp); 1010 } 1011 return (NULL); 1012 } 1013 1014 static int 1015 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1016 { 1017 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 1018 int ipv4_addr_legal, ipv6_addr_legal; 1019 struct sctp_vrf *vrf; 1020 struct sctp_ifn *sctp_ifn; 1021 struct sctp_ifa *sctp_ifa; 1022 1023 loopback_scope = stcb->asoc.loopback_scope; 1024 ipv4_local_scope = stcb->asoc.ipv4_local_scope; 1025 local_scope = stcb->asoc.local_scope; 1026 site_scope = stcb->asoc.site_scope; 1027 ipv4_addr_legal = ipv6_addr_legal = 0; 1028 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1029 ipv6_addr_legal = 1; 1030 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) { 1031 ipv4_addr_legal = 1; 1032 } 1033 } else { 1034 ipv4_addr_legal = 1; 1035 } 1036 1037 SCTP_IPI_ADDR_RLOCK(); 1038 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1039 if (vrf == NULL) { 1040 /* no vrf, no addresses */ 1041 SCTP_IPI_ADDR_RUNLOCK(); 1042 return (0); 1043 } 1044 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1045 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1046 if ((loopback_scope == 0) && 1047 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1048 continue; 1049 } 1050 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1051 if (sctp_is_addr_restricted(stcb, sctp_ifa)) 1052 continue; 1053 switch (sctp_ifa->address.sa.sa_family) { 1054 #ifdef INET 1055 case AF_INET: 1056 if (ipv4_addr_legal) { 1057 struct sockaddr_in *sin, 1058 *rsin; 1059 1060 sin = &sctp_ifa->address.sin; 1061 rsin = (struct sockaddr_in *)to; 1062 if ((ipv4_local_scope == 0) && 1063 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1064 continue; 1065 } 1066 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1067 SCTP_IPI_ADDR_RUNLOCK(); 1068 return (1); 1069 } 1070 } 1071 break; 1072 #endif 1073 #ifdef INET6 1074 case AF_INET6: 1075 if (ipv6_addr_legal) { 1076 struct sockaddr_in6 *sin6, 1077 *rsin6; 1078 1079 sin6 = &sctp_ifa->address.sin6; 1080 rsin6 = (struct sockaddr_in6 *)to; 1081 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1082 if (local_scope == 0) 1083 continue; 1084 if (sin6->sin6_scope_id == 0) { 1085 if (sa6_recoverscope(sin6) != 0) 1086 continue; 1087 } 1088 } 1089 if ((site_scope == 0) && 1090 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1091 continue; 1092 } 1093 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1094 SCTP_IPI_ADDR_RUNLOCK(); 1095 return (1); 1096 } 1097 } 1098 break; 1099 #endif 1100 default: 1101 /* TSNH */ 1102 break; 1103 } 1104 } 1105 } 1106 } else { 1107 struct sctp_laddr *laddr; 1108 1109 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1110 if (sctp_is_addr_restricted(stcb, laddr->ifa)) { 1111 continue; 1112 } 1113 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 1114 continue; 1115 } 1116 switch (to->sa_family) { 1117 #ifdef INET 1118 case AF_INET: 1119 { 1120 struct sockaddr_in *sin, *rsin; 1121 1122 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 1123 rsin = (struct sockaddr_in *)to; 1124 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1125 SCTP_IPI_ADDR_RUNLOCK(); 1126 return (1); 1127 } 1128 break; 1129 } 1130 #endif 1131 #ifdef INET6 1132 case AF_INET6: 1133 { 1134 struct sockaddr_in6 *sin6, *rsin6; 1135 1136 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1137 rsin6 = (struct sockaddr_in6 *)to; 1138 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1139 SCTP_IPI_ADDR_RUNLOCK(); 1140 return (1); 1141 } 1142 break; 1143 } 1144 1145 #endif 1146 default: 1147 /* TSNH */ 1148 break; 1149 } 1150 1151 } 1152 } 1153 SCTP_IPI_ADDR_RUNLOCK(); 1154 return (0); 1155 } 1156 1157 /* 1158 * rules for use 1159 * 1160 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1161 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1162 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1163 * NULL. 1164 */ 1165 1166 struct sctp_tcb * 1167 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1168 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1169 { 1170 struct sctpasochead *head; 1171 struct sctp_inpcb *inp; 1172 struct sctp_tcb *stcb = NULL; 1173 struct sctp_nets *net; 1174 uint16_t rport; 1175 1176 inp = *inp_p; 1177 if (remote->sa_family == AF_INET) { 1178 rport = (((struct sockaddr_in *)remote)->sin_port); 1179 } else if (remote->sa_family == AF_INET6) { 1180 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1181 } else { 1182 return (NULL); 1183 } 1184 if (locked_tcb) { 1185 /* 1186 * UN-lock so we can do proper locking here this occurs when 1187 * called from load_addresses_from_init. 1188 */ 1189 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1190 SCTP_TCB_UNLOCK(locked_tcb); 1191 } 1192 SCTP_INP_INFO_RLOCK(); 1193 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1194 /*- 1195 * Now either this guy is our listener or it's the 1196 * connector. If it is the one that issued the connect, then 1197 * it's only chance is to be the first TCB in the list. If 1198 * it is the acceptor, then do the special_lookup to hash 1199 * and find the real inp. 1200 */ 1201 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1202 /* to is peer addr, from is my addr */ 1203 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1204 netp, inp->def_vrf_id); 1205 if ((stcb != NULL) && (locked_tcb == NULL)) { 1206 /* we have a locked tcb, lower refcount */ 1207 SCTP_INP_DECR_REF(inp); 1208 } 1209 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1210 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1211 SCTP_TCB_LOCK(locked_tcb); 1212 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1213 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1214 } 1215 SCTP_INP_INFO_RUNLOCK(); 1216 return (stcb); 1217 } else { 1218 SCTP_INP_WLOCK(inp); 1219 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1220 goto null_return; 1221 } 1222 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1223 if (stcb == NULL) { 1224 goto null_return; 1225 } 1226 SCTP_TCB_LOCK(stcb); 1227 1228 if (stcb->rport != rport) { 1229 /* remote port does not match. */ 1230 SCTP_TCB_UNLOCK(stcb); 1231 goto null_return; 1232 } 1233 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1234 SCTP_TCB_UNLOCK(stcb); 1235 goto null_return; 1236 } 1237 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1238 SCTP_TCB_UNLOCK(stcb); 1239 goto null_return; 1240 } 1241 /* now look at the list of remote addresses */ 1242 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1243 #ifdef INVARIANTS 1244 if (net == (TAILQ_NEXT(net, sctp_next))) { 1245 panic("Corrupt net list"); 1246 } 1247 #endif 1248 if (net->ro._l_addr.sa.sa_family != 1249 remote->sa_family) { 1250 /* not the same family */ 1251 continue; 1252 } 1253 switch (remote->sa_family) { 1254 case AF_INET: 1255 { 1256 struct sockaddr_in *sin, 1257 *rsin; 1258 1259 sin = (struct sockaddr_in *) 1260 &net->ro._l_addr; 1261 rsin = (struct sockaddr_in *)remote; 1262 if (sin->sin_addr.s_addr == 1263 rsin->sin_addr.s_addr) { 1264 /* found it */ 1265 if (netp != NULL) { 1266 *netp = net; 1267 } 1268 if (locked_tcb == NULL) { 1269 SCTP_INP_DECR_REF(inp); 1270 } else if (locked_tcb != stcb) { 1271 SCTP_TCB_LOCK(locked_tcb); 1272 } 1273 if (locked_tcb) { 1274 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1275 } 1276 SCTP_INP_WUNLOCK(inp); 1277 SCTP_INP_INFO_RUNLOCK(); 1278 return (stcb); 1279 } 1280 break; 1281 } 1282 #ifdef INET6 1283 case AF_INET6: 1284 { 1285 struct sockaddr_in6 *sin6, 1286 *rsin6; 1287 1288 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1289 rsin6 = (struct sockaddr_in6 *)remote; 1290 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1291 rsin6)) { 1292 /* found it */ 1293 if (netp != NULL) { 1294 *netp = net; 1295 } 1296 if (locked_tcb == NULL) { 1297 SCTP_INP_DECR_REF(inp); 1298 } else if (locked_tcb != stcb) { 1299 SCTP_TCB_LOCK(locked_tcb); 1300 } 1301 if (locked_tcb) { 1302 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1303 } 1304 SCTP_INP_WUNLOCK(inp); 1305 SCTP_INP_INFO_RUNLOCK(); 1306 return (stcb); 1307 } 1308 break; 1309 } 1310 #endif 1311 default: 1312 /* TSNH */ 1313 break; 1314 } 1315 } 1316 SCTP_TCB_UNLOCK(stcb); 1317 } 1318 } else { 1319 SCTP_INP_WLOCK(inp); 1320 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1321 goto null_return; 1322 } 1323 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1324 inp->sctp_hashmark)]; 1325 if (head == NULL) { 1326 goto null_return; 1327 } 1328 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1329 if (stcb->rport != rport) { 1330 /* remote port does not match */ 1331 continue; 1332 } 1333 SCTP_TCB_LOCK(stcb); 1334 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1335 SCTP_TCB_UNLOCK(stcb); 1336 continue; 1337 } 1338 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1339 SCTP_TCB_UNLOCK(stcb); 1340 continue; 1341 } 1342 /* now look at the list of remote addresses */ 1343 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1344 #ifdef INVARIANTS 1345 if (net == (TAILQ_NEXT(net, sctp_next))) { 1346 panic("Corrupt net list"); 1347 } 1348 #endif 1349 if (net->ro._l_addr.sa.sa_family != 1350 remote->sa_family) { 1351 /* not the same family */ 1352 continue; 1353 } 1354 switch (remote->sa_family) { 1355 case AF_INET: 1356 { 1357 struct sockaddr_in *sin, 1358 *rsin; 1359 1360 sin = (struct sockaddr_in *) 1361 &net->ro._l_addr; 1362 rsin = (struct sockaddr_in *)remote; 1363 if (sin->sin_addr.s_addr == 1364 rsin->sin_addr.s_addr) { 1365 /* found it */ 1366 if (netp != NULL) { 1367 *netp = net; 1368 } 1369 if (locked_tcb == NULL) { 1370 SCTP_INP_DECR_REF(inp); 1371 } else if (locked_tcb != stcb) { 1372 SCTP_TCB_LOCK(locked_tcb); 1373 } 1374 if (locked_tcb) { 1375 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1376 } 1377 SCTP_INP_WUNLOCK(inp); 1378 SCTP_INP_INFO_RUNLOCK(); 1379 return (stcb); 1380 } 1381 break; 1382 } 1383 #ifdef INET6 1384 case AF_INET6: 1385 { 1386 struct sockaddr_in6 *sin6, 1387 *rsin6; 1388 1389 sin6 = (struct sockaddr_in6 *) 1390 &net->ro._l_addr; 1391 rsin6 = (struct sockaddr_in6 *)remote; 1392 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1393 rsin6)) { 1394 /* found it */ 1395 if (netp != NULL) { 1396 *netp = net; 1397 } 1398 if (locked_tcb == NULL) { 1399 SCTP_INP_DECR_REF(inp); 1400 } else if (locked_tcb != stcb) { 1401 SCTP_TCB_LOCK(locked_tcb); 1402 } 1403 if (locked_tcb) { 1404 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1405 } 1406 SCTP_INP_WUNLOCK(inp); 1407 SCTP_INP_INFO_RUNLOCK(); 1408 return (stcb); 1409 } 1410 break; 1411 } 1412 #endif 1413 default: 1414 /* TSNH */ 1415 break; 1416 } 1417 } 1418 SCTP_TCB_UNLOCK(stcb); 1419 } 1420 } 1421 null_return: 1422 /* clean up for returning null */ 1423 if (locked_tcb) { 1424 SCTP_TCB_LOCK(locked_tcb); 1425 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1426 } 1427 SCTP_INP_WUNLOCK(inp); 1428 SCTP_INP_INFO_RUNLOCK(); 1429 /* not found */ 1430 return (NULL); 1431 } 1432 1433 /* 1434 * Find an association for a specific endpoint using the association id given 1435 * out in the COMM_UP notification 1436 */ 1437 1438 struct sctp_tcb * 1439 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1440 { 1441 /* 1442 * Use my the assoc_id to find a endpoint 1443 */ 1444 struct sctpasochead *head; 1445 struct sctp_tcb *stcb; 1446 uint32_t id; 1447 1448 if (inp == NULL) { 1449 SCTP_PRINTF("TSNH ep_associd\n"); 1450 return (NULL); 1451 } 1452 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1453 SCTP_PRINTF("TSNH ep_associd0\n"); 1454 return (NULL); 1455 } 1456 id = (uint32_t) asoc_id; 1457 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1458 if (head == NULL) { 1459 /* invalid id TSNH */ 1460 SCTP_PRINTF("TSNH ep_associd1\n"); 1461 return (NULL); 1462 } 1463 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1464 if (stcb->asoc.assoc_id == id) { 1465 if (inp != stcb->sctp_ep) { 1466 /* 1467 * some other guy has the same id active (id 1468 * collision ??). 1469 */ 1470 SCTP_PRINTF("TSNH ep_associd2\n"); 1471 continue; 1472 } 1473 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1474 continue; 1475 } 1476 if (want_lock) { 1477 SCTP_TCB_LOCK(stcb); 1478 } 1479 return (stcb); 1480 } 1481 } 1482 return (NULL); 1483 } 1484 1485 1486 struct sctp_tcb * 1487 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1488 { 1489 struct sctp_tcb *stcb; 1490 1491 SCTP_INP_RLOCK(inp); 1492 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1493 SCTP_INP_RUNLOCK(inp); 1494 return (stcb); 1495 } 1496 1497 1498 static struct sctp_inpcb * 1499 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1500 uint16_t lport, uint32_t vrf_id) 1501 { 1502 struct sctp_inpcb *inp; 1503 struct sockaddr_in *sin; 1504 1505 #ifdef INET6 1506 struct sockaddr_in6 *sin6; 1507 1508 #endif 1509 struct sctp_laddr *laddr; 1510 1511 #ifdef INET6 1512 struct sockaddr_in6 *intf_addr6; 1513 1514 #endif 1515 1516 int fnd; 1517 1518 /* 1519 * Endpoint probe expects that the INP_INFO is locked. 1520 */ 1521 sin = NULL; 1522 #ifdef INET6 1523 sin6 = NULL; 1524 #endif 1525 switch (nam->sa_family) { 1526 case AF_INET: 1527 sin = (struct sockaddr_in *)nam; 1528 break; 1529 #ifdef INET6 1530 case AF_INET6: 1531 sin6 = (struct sockaddr_in6 *)nam; 1532 break; 1533 #endif 1534 default: 1535 /* unsupported family */ 1536 return (NULL); 1537 } 1538 1539 if (head == NULL) 1540 return (NULL); 1541 1542 LIST_FOREACH(inp, head, sctp_hash) { 1543 SCTP_INP_RLOCK(inp); 1544 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1545 SCTP_INP_RUNLOCK(inp); 1546 continue; 1547 } 1548 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1549 (inp->sctp_lport == lport)) { 1550 /* got it */ 1551 if ((nam->sa_family == AF_INET) && 1552 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1553 SCTP_IPV6_V6ONLY(inp)) { 1554 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1555 SCTP_INP_RUNLOCK(inp); 1556 continue; 1557 } 1558 /* A V6 address and the endpoint is NOT bound V6 */ 1559 if (nam->sa_family == AF_INET6 && 1560 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1561 SCTP_INP_RUNLOCK(inp); 1562 continue; 1563 } 1564 /* does a VRF id match? */ 1565 fnd = 0; 1566 if (inp->def_vrf_id == vrf_id) 1567 fnd = 1; 1568 1569 SCTP_INP_RUNLOCK(inp); 1570 if (!fnd) 1571 continue; 1572 return (inp); 1573 } 1574 SCTP_INP_RUNLOCK(inp); 1575 } 1576 if ((nam->sa_family == AF_INET) && 1577 (sin->sin_addr.s_addr == INADDR_ANY)) { 1578 /* Can't hunt for one that has no address specified */ 1579 return (NULL); 1580 } 1581 #ifdef INET6 1582 if ((nam->sa_family == AF_INET6) && 1583 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 1584 /* Can't hunt for one that has no address specified */ 1585 return (NULL); 1586 } 1587 #endif 1588 /* 1589 * ok, not bound to all so see if we can find a EP bound to this 1590 * address. 1591 */ 1592 LIST_FOREACH(inp, head, sctp_hash) { 1593 SCTP_INP_RLOCK(inp); 1594 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1595 SCTP_INP_RUNLOCK(inp); 1596 continue; 1597 } 1598 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1599 SCTP_INP_RUNLOCK(inp); 1600 continue; 1601 } 1602 /* 1603 * Ok this could be a likely candidate, look at all of its 1604 * addresses 1605 */ 1606 if (inp->sctp_lport != lport) { 1607 SCTP_INP_RUNLOCK(inp); 1608 continue; 1609 } 1610 /* does a VRF id match? */ 1611 fnd = 0; 1612 if (inp->def_vrf_id == vrf_id) 1613 fnd = 1; 1614 1615 if (!fnd) { 1616 SCTP_INP_RUNLOCK(inp); 1617 continue; 1618 } 1619 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1620 if (laddr->ifa == NULL) { 1621 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1622 __FUNCTION__); 1623 continue; 1624 } 1625 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1626 laddr->ifa); 1627 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1628 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1629 continue; 1630 } 1631 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1632 /* possible, see if it matches */ 1633 struct sockaddr_in *intf_addr; 1634 1635 intf_addr = &laddr->ifa->address.sin; 1636 switch (nam->sa_family) { 1637 case AF_INET: 1638 if (sin->sin_addr.s_addr == 1639 intf_addr->sin_addr.s_addr) { 1640 SCTP_INP_RUNLOCK(inp); 1641 return (inp); 1642 } 1643 break; 1644 #ifdef INET6 1645 case AF_INET6: 1646 intf_addr6 = &laddr->ifa->address.sin6; 1647 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1648 intf_addr6)) { 1649 SCTP_INP_RUNLOCK(inp); 1650 return (inp); 1651 } 1652 break; 1653 #endif 1654 } 1655 } 1656 } 1657 SCTP_INP_RUNLOCK(inp); 1658 } 1659 return (NULL); 1660 } 1661 1662 1663 static struct sctp_inpcb * 1664 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1665 { 1666 struct sctppcbhead *head; 1667 struct sctp_inpcb *t_inp; 1668 int fnd; 1669 1670 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1671 SCTP_BASE_INFO(hashmark))]; 1672 LIST_FOREACH(t_inp, head, sctp_hash) { 1673 if (t_inp->sctp_lport != lport) { 1674 continue; 1675 } 1676 /* is it in the VRF in question */ 1677 fnd = 0; 1678 if (t_inp->def_vrf_id == vrf_id) 1679 fnd = 1; 1680 if (!fnd) 1681 continue; 1682 1683 /* This one is in use. */ 1684 /* check the v6/v4 binding issue */ 1685 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1686 SCTP_IPV6_V6ONLY(t_inp)) { 1687 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1688 /* collision in V6 space */ 1689 return (t_inp); 1690 } else { 1691 /* inp is BOUND_V4 no conflict */ 1692 continue; 1693 } 1694 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1695 /* t_inp is bound v4 and v6, conflict always */ 1696 return (t_inp); 1697 } else { 1698 /* t_inp is bound only V4 */ 1699 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1700 SCTP_IPV6_V6ONLY(inp)) { 1701 /* no conflict */ 1702 continue; 1703 } 1704 /* else fall through to conflict */ 1705 } 1706 return (t_inp); 1707 } 1708 return (NULL); 1709 } 1710 1711 1712 int 1713 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1714 { 1715 /* For 1-2-1 with port reuse */ 1716 struct sctppcbhead *head; 1717 struct sctp_inpcb *tinp; 1718 1719 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1720 /* only works with port reuse on */ 1721 return (-1); 1722 } 1723 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1724 return (0); 1725 } 1726 SCTP_INP_RUNLOCK(inp); 1727 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1728 SCTP_BASE_INFO(hashmark))]; 1729 /* Kick out all non-listeners to the TCP hash */ 1730 LIST_FOREACH(tinp, head, sctp_hash) { 1731 if (tinp->sctp_lport != inp->sctp_lport) { 1732 continue; 1733 } 1734 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1735 continue; 1736 } 1737 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1738 continue; 1739 } 1740 if (tinp->sctp_socket->so_qlimit) { 1741 continue; 1742 } 1743 SCTP_INP_WLOCK(tinp); 1744 LIST_REMOVE(tinp, sctp_hash); 1745 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1746 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1747 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1748 SCTP_INP_WUNLOCK(tinp); 1749 } 1750 SCTP_INP_WLOCK(inp); 1751 /* Pull from where he was */ 1752 LIST_REMOVE(inp, sctp_hash); 1753 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1754 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1755 LIST_INSERT_HEAD(head, inp, sctp_hash); 1756 SCTP_INP_WUNLOCK(inp); 1757 SCTP_INP_RLOCK(inp); 1758 return (0); 1759 } 1760 1761 1762 struct sctp_inpcb * 1763 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1764 uint32_t vrf_id) 1765 { 1766 /* 1767 * First we check the hash table to see if someone has this port 1768 * bound with just the port. 1769 */ 1770 struct sctp_inpcb *inp; 1771 struct sctppcbhead *head; 1772 struct sockaddr_in *sin; 1773 struct sockaddr_in6 *sin6; 1774 int lport; 1775 unsigned int i; 1776 1777 if (nam->sa_family == AF_INET) { 1778 sin = (struct sockaddr_in *)nam; 1779 lport = ((struct sockaddr_in *)nam)->sin_port; 1780 } else if (nam->sa_family == AF_INET6) { 1781 sin6 = (struct sockaddr_in6 *)nam; 1782 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1783 } else { 1784 /* unsupported family */ 1785 return (NULL); 1786 } 1787 /* 1788 * I could cheat here and just cast to one of the types but we will 1789 * do it right. It also provides the check against an Unsupported 1790 * type too. 1791 */ 1792 /* Find the head of the ALLADDR chain */ 1793 if (have_lock == 0) { 1794 SCTP_INP_INFO_RLOCK(); 1795 } 1796 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1797 SCTP_BASE_INFO(hashmark))]; 1798 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1799 1800 /* 1801 * If the TCP model exists it could be that the main listening 1802 * endpoint is gone but there still exists a connected socket for 1803 * this guy. If so we can return the first one that we find. This 1804 * may NOT be the correct one so the caller should be wary on the 1805 * returned INP. Currently the only caller that sets find_tcp_pool 1806 * is in bindx where we are verifying that a user CAN bind the 1807 * address. He either has bound it already, or someone else has, or 1808 * its open to bind, so this is good enough. 1809 */ 1810 if (inp == NULL && find_tcp_pool) { 1811 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1812 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1813 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1814 if (inp) { 1815 break; 1816 } 1817 } 1818 } 1819 if (inp) { 1820 SCTP_INP_INCR_REF(inp); 1821 } 1822 if (have_lock == 0) { 1823 SCTP_INP_INFO_RUNLOCK(); 1824 } 1825 return (inp); 1826 } 1827 1828 /* 1829 * Find an association for an endpoint with the pointer to whom you want to 1830 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1831 * need to change the *to to some other struct like a mbuf... 1832 */ 1833 struct sctp_tcb * 1834 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1835 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1836 uint32_t vrf_id) 1837 { 1838 struct sctp_inpcb *inp = NULL; 1839 struct sctp_tcb *retval; 1840 1841 SCTP_INP_INFO_RLOCK(); 1842 if (find_tcp_pool) { 1843 if (inp_p != NULL) { 1844 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1845 vrf_id); 1846 } else { 1847 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1848 vrf_id); 1849 } 1850 if (retval != NULL) { 1851 SCTP_INP_INFO_RUNLOCK(); 1852 return (retval); 1853 } 1854 } 1855 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1856 if (inp_p != NULL) { 1857 *inp_p = inp; 1858 } 1859 SCTP_INP_INFO_RUNLOCK(); 1860 1861 if (inp == NULL) { 1862 return (NULL); 1863 } 1864 /* 1865 * ok, we have an endpoint, now lets find the assoc for it (if any) 1866 * we now place the source address or from in the to of the find 1867 * endpoint call. Since in reality this chain is used from the 1868 * inbound packet side. 1869 */ 1870 if (inp_p != NULL) { 1871 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1872 NULL); 1873 } else { 1874 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1875 NULL); 1876 } 1877 return retval; 1878 } 1879 1880 1881 /* 1882 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1883 * find all addresses that the sender has specified in any address list. Each 1884 * address will be used to lookup the TCB and see if one exits. 1885 */ 1886 static struct sctp_tcb * 1887 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1888 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1889 struct sockaddr *dest) 1890 { 1891 struct sockaddr_in sin4; 1892 struct sockaddr_in6 sin6; 1893 struct sctp_paramhdr *phdr, parm_buf; 1894 struct sctp_tcb *retval; 1895 uint32_t ptype, plen; 1896 1897 memset(&sin4, 0, sizeof(sin4)); 1898 memset(&sin6, 0, sizeof(sin6)); 1899 sin4.sin_len = sizeof(sin4); 1900 sin4.sin_family = AF_INET; 1901 sin4.sin_port = sh->src_port; 1902 sin6.sin6_len = sizeof(sin6); 1903 sin6.sin6_family = AF_INET6; 1904 sin6.sin6_port = sh->src_port; 1905 1906 retval = NULL; 1907 offset += sizeof(struct sctp_init_chunk); 1908 1909 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1910 while (phdr != NULL) { 1911 /* now we must see if we want the parameter */ 1912 ptype = ntohs(phdr->param_type); 1913 plen = ntohs(phdr->param_length); 1914 if (plen == 0) { 1915 break; 1916 } 1917 if (ptype == SCTP_IPV4_ADDRESS && 1918 plen == sizeof(struct sctp_ipv4addr_param)) { 1919 /* Get the rest of the address */ 1920 struct sctp_ipv4addr_param ip4_parm, *p4; 1921 1922 phdr = sctp_get_next_param(m, offset, 1923 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1924 if (phdr == NULL) { 1925 return (NULL); 1926 } 1927 p4 = (struct sctp_ipv4addr_param *)phdr; 1928 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 1929 /* look it up */ 1930 retval = sctp_findassociation_ep_addr(inp_p, 1931 (struct sockaddr *)&sin4, netp, dest, NULL); 1932 if (retval != NULL) { 1933 return (retval); 1934 } 1935 } else if (ptype == SCTP_IPV6_ADDRESS && 1936 plen == sizeof(struct sctp_ipv6addr_param)) { 1937 /* Get the rest of the address */ 1938 struct sctp_ipv6addr_param ip6_parm, *p6; 1939 1940 phdr = sctp_get_next_param(m, offset, 1941 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 1942 if (phdr == NULL) { 1943 return (NULL); 1944 } 1945 p6 = (struct sctp_ipv6addr_param *)phdr; 1946 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 1947 /* look it up */ 1948 retval = sctp_findassociation_ep_addr(inp_p, 1949 (struct sockaddr *)&sin6, netp, dest, NULL); 1950 if (retval != NULL) { 1951 return (retval); 1952 } 1953 } 1954 offset += SCTP_SIZE32(plen); 1955 phdr = sctp_get_next_param(m, offset, &parm_buf, 1956 sizeof(parm_buf)); 1957 } 1958 return (NULL); 1959 } 1960 1961 static struct sctp_tcb * 1962 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 1963 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 1964 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 1965 { 1966 /* 1967 * Use my vtag to hash. If we find it we then verify the source addr 1968 * is in the assoc. If all goes well we save a bit on rec of a 1969 * packet. 1970 */ 1971 struct sctpasochead *head; 1972 struct sctp_nets *net; 1973 struct sctp_tcb *stcb; 1974 1975 *netp = NULL; 1976 *inp_p = NULL; 1977 SCTP_INP_INFO_RLOCK(); 1978 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 1979 SCTP_BASE_INFO(hashasocmark))]; 1980 if (head == NULL) { 1981 /* invalid vtag */ 1982 SCTP_INP_INFO_RUNLOCK(); 1983 return (NULL); 1984 } 1985 LIST_FOREACH(stcb, head, sctp_asocs) { 1986 SCTP_INP_RLOCK(stcb->sctp_ep); 1987 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1988 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1989 continue; 1990 } 1991 SCTP_TCB_LOCK(stcb); 1992 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1993 if (stcb->asoc.my_vtag == vtag) { 1994 /* candidate */ 1995 if (stcb->rport != rport) { 1996 SCTP_TCB_UNLOCK(stcb); 1997 continue; 1998 } 1999 if (stcb->sctp_ep->sctp_lport != lport) { 2000 SCTP_TCB_UNLOCK(stcb); 2001 continue; 2002 } 2003 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2004 SCTP_TCB_UNLOCK(stcb); 2005 continue; 2006 } 2007 /* RRS:Need toaddr check here */ 2008 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2009 /* Endpoint does not own this address */ 2010 SCTP_TCB_UNLOCK(stcb); 2011 continue; 2012 } 2013 if (remote_tag) { 2014 /* 2015 * If we have both vtags that's all we match 2016 * on 2017 */ 2018 if (stcb->asoc.peer_vtag == remote_tag) { 2019 /* 2020 * If both tags match we consider it 2021 * conclusive and check NO 2022 * source/destination addresses 2023 */ 2024 goto conclusive; 2025 } 2026 } 2027 if (skip_src_check) { 2028 conclusive: 2029 if (from) { 2030 net = sctp_findnet(stcb, from); 2031 } else { 2032 *netp = NULL; /* unknown */ 2033 } 2034 if (inp_p) 2035 *inp_p = stcb->sctp_ep; 2036 SCTP_INP_INFO_RUNLOCK(); 2037 return (stcb); 2038 } 2039 net = sctp_findnet(stcb, from); 2040 if (net) { 2041 /* yep its him. */ 2042 *netp = net; 2043 SCTP_STAT_INCR(sctps_vtagexpress); 2044 *inp_p = stcb->sctp_ep; 2045 SCTP_INP_INFO_RUNLOCK(); 2046 return (stcb); 2047 } else { 2048 /* 2049 * not him, this should only happen in rare 2050 * cases so I peg it. 2051 */ 2052 SCTP_STAT_INCR(sctps_vtagbogus); 2053 } 2054 } 2055 SCTP_TCB_UNLOCK(stcb); 2056 } 2057 SCTP_INP_INFO_RUNLOCK(); 2058 return (NULL); 2059 } 2060 2061 /* 2062 * Find an association with the pointer to the inbound IP packet. This can be 2063 * a IPv4 or IPv6 packet. 2064 */ 2065 struct sctp_tcb * 2066 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 2067 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2068 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2069 { 2070 int find_tcp_pool; 2071 struct ip *iph; 2072 struct sctp_tcb *retval; 2073 struct sockaddr_storage to_store, from_store; 2074 struct sockaddr *to = (struct sockaddr *)&to_store; 2075 struct sockaddr *from = (struct sockaddr *)&from_store; 2076 struct sctp_inpcb *inp; 2077 2078 iph = mtod(m, struct ip *); 2079 switch (iph->ip_v) { 2080 case IPVERSION: 2081 { 2082 /* its IPv4 */ 2083 struct sockaddr_in *from4; 2084 2085 from4 = (struct sockaddr_in *)&from_store; 2086 bzero(from4, sizeof(*from4)); 2087 from4->sin_family = AF_INET; 2088 from4->sin_len = sizeof(struct sockaddr_in); 2089 from4->sin_addr.s_addr = iph->ip_src.s_addr; 2090 from4->sin_port = sh->src_port; 2091 break; 2092 } 2093 #ifdef INET6 2094 case IPV6_VERSION >> 4: 2095 { 2096 /* its IPv6 */ 2097 struct ip6_hdr *ip6; 2098 struct sockaddr_in6 *from6; 2099 2100 ip6 = mtod(m, struct ip6_hdr *); 2101 from6 = (struct sockaddr_in6 *)&from_store; 2102 bzero(from6, sizeof(*from6)); 2103 from6->sin6_family = AF_INET6; 2104 from6->sin6_len = sizeof(struct sockaddr_in6); 2105 from6->sin6_addr = ip6->ip6_src; 2106 from6->sin6_port = sh->src_port; 2107 /* Get the scopes in properly to the sin6 addr's */ 2108 /* we probably don't need these operations */ 2109 (void)sa6_recoverscope(from6); 2110 sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone)); 2111 break; 2112 } 2113 #endif 2114 default: 2115 /* Currently not supported. */ 2116 return (NULL); 2117 } 2118 2119 2120 switch (iph->ip_v) { 2121 case IPVERSION: 2122 { 2123 /* its IPv4 */ 2124 struct sockaddr_in *to4; 2125 2126 to4 = (struct sockaddr_in *)&to_store; 2127 bzero(to4, sizeof(*to4)); 2128 to4->sin_family = AF_INET; 2129 to4->sin_len = sizeof(struct sockaddr_in); 2130 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 2131 to4->sin_port = sh->dest_port; 2132 break; 2133 } 2134 #ifdef INET6 2135 case IPV6_VERSION >> 4: 2136 { 2137 /* its IPv6 */ 2138 struct ip6_hdr *ip6; 2139 struct sockaddr_in6 *to6; 2140 2141 ip6 = mtod(m, struct ip6_hdr *); 2142 to6 = (struct sockaddr_in6 *)&to_store; 2143 bzero(to6, sizeof(*to6)); 2144 to6->sin6_family = AF_INET6; 2145 to6->sin6_len = sizeof(struct sockaddr_in6); 2146 to6->sin6_addr = ip6->ip6_dst; 2147 to6->sin6_port = sh->dest_port; 2148 /* Get the scopes in properly to the sin6 addr's */ 2149 /* we probably don't need these operations */ 2150 (void)sa6_recoverscope(to6); 2151 sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone)); 2152 break; 2153 } 2154 #endif 2155 default: 2156 /* TSNH */ 2157 break; 2158 } 2159 if (sh->v_tag) { 2160 /* we only go down this path if vtag is non-zero */ 2161 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag), 2162 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2163 if (retval) { 2164 return (retval); 2165 } 2166 } 2167 find_tcp_pool = 0; 2168 if ((ch->chunk_type != SCTP_INITIATION) && 2169 (ch->chunk_type != SCTP_INITIATION_ACK) && 2170 (ch->chunk_type != SCTP_COOKIE_ACK) && 2171 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2172 /* Other chunk types go to the tcp pool. */ 2173 find_tcp_pool = 1; 2174 } 2175 if (inp_p) { 2176 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 2177 find_tcp_pool, vrf_id); 2178 inp = *inp_p; 2179 } else { 2180 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 2181 find_tcp_pool, vrf_id); 2182 } 2183 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2184 if (retval == NULL && inp) { 2185 /* Found a EP but not this address */ 2186 if ((ch->chunk_type == SCTP_INITIATION) || 2187 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2188 /*- 2189 * special hook, we do NOT return linp or an 2190 * association that is linked to an existing 2191 * association that is under the TCP pool (i.e. no 2192 * listener exists). The endpoint finding routine 2193 * will always find a listener before examining the 2194 * TCP pool. 2195 */ 2196 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2197 if (inp_p) { 2198 *inp_p = NULL; 2199 } 2200 return (NULL); 2201 } 2202 retval = sctp_findassociation_special_addr(m, iphlen, 2203 offset, sh, &inp, netp, to); 2204 if (inp_p != NULL) { 2205 *inp_p = inp; 2206 } 2207 } 2208 } 2209 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2210 return (retval); 2211 } 2212 2213 /* 2214 * lookup an association by an ASCONF lookup address. 2215 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2216 */ 2217 struct sctp_tcb * 2218 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 2219 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2220 { 2221 struct sctp_tcb *stcb; 2222 struct sockaddr_in *sin; 2223 2224 #ifdef INET6 2225 struct sockaddr_in6 *sin6; 2226 2227 #endif 2228 struct sockaddr_storage local_store, remote_store; 2229 struct sockaddr *to; 2230 struct ip *iph; 2231 2232 #ifdef INET6 2233 struct ip6_hdr *ip6; 2234 2235 #endif 2236 struct sctp_paramhdr parm_buf, *phdr; 2237 int ptype; 2238 int zero_address = 0; 2239 2240 2241 memset(&local_store, 0, sizeof(local_store)); 2242 memset(&remote_store, 0, sizeof(remote_store)); 2243 to = (struct sockaddr *)&local_store; 2244 /* First get the destination address setup too. */ 2245 iph = mtod(m, struct ip *); 2246 switch (iph->ip_v) { 2247 case IPVERSION: 2248 /* its IPv4 */ 2249 sin = (struct sockaddr_in *)&local_store; 2250 sin->sin_family = AF_INET; 2251 sin->sin_len = sizeof(*sin); 2252 sin->sin_port = sh->dest_port; 2253 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 2254 break; 2255 #ifdef INET6 2256 case IPV6_VERSION >> 4: 2257 /* its IPv6 */ 2258 ip6 = mtod(m, struct ip6_hdr *); 2259 sin6 = (struct sockaddr_in6 *)&local_store; 2260 sin6->sin6_family = AF_INET6; 2261 sin6->sin6_len = sizeof(*sin6); 2262 sin6->sin6_port = sh->dest_port; 2263 sin6->sin6_addr = ip6->ip6_dst; 2264 break; 2265 #endif 2266 default: 2267 return NULL; 2268 } 2269 2270 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2271 &parm_buf, sizeof(struct sctp_paramhdr)); 2272 if (phdr == NULL) { 2273 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2274 __FUNCTION__); 2275 return NULL; 2276 } 2277 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2278 /* get the correlation address */ 2279 switch (ptype) { 2280 #ifdef INET6 2281 case SCTP_IPV6_ADDRESS: 2282 { 2283 /* ipv6 address param */ 2284 struct sctp_ipv6addr_param *p6, p6_buf; 2285 2286 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2287 return NULL; 2288 } 2289 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2290 offset + sizeof(struct sctp_asconf_chunk), 2291 &p6_buf.ph, sizeof(*p6)); 2292 if (p6 == NULL) { 2293 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2294 __FUNCTION__); 2295 return (NULL); 2296 } 2297 sin6 = (struct sockaddr_in6 *)&remote_store; 2298 sin6->sin6_family = AF_INET6; 2299 sin6->sin6_len = sizeof(*sin6); 2300 sin6->sin6_port = sh->src_port; 2301 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2302 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2303 zero_address = 1; 2304 break; 2305 } 2306 #endif 2307 case SCTP_IPV4_ADDRESS: 2308 { 2309 /* ipv4 address param */ 2310 struct sctp_ipv4addr_param *p4, p4_buf; 2311 2312 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2313 return NULL; 2314 } 2315 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2316 offset + sizeof(struct sctp_asconf_chunk), 2317 &p4_buf.ph, sizeof(*p4)); 2318 if (p4 == NULL) { 2319 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2320 __FUNCTION__); 2321 return (NULL); 2322 } 2323 sin = (struct sockaddr_in *)&remote_store; 2324 sin->sin_family = AF_INET; 2325 sin->sin_len = sizeof(*sin); 2326 sin->sin_port = sh->src_port; 2327 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2328 if (sin->sin_addr.s_addr == INADDR_ANY) 2329 zero_address = 1; 2330 break; 2331 } 2332 default: 2333 /* invalid address param type */ 2334 return NULL; 2335 } 2336 2337 if (zero_address) { 2338 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p, 2339 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2340 /* 2341 * printf("findassociation_ep_asconf: zero lookup address 2342 * finds stcb 0x%x\n", (uint32_t)stcb); 2343 */ 2344 } else { 2345 stcb = sctp_findassociation_ep_addr(inp_p, 2346 (struct sockaddr *)&remote_store, netp, 2347 to, NULL); 2348 } 2349 return (stcb); 2350 } 2351 2352 2353 /* 2354 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2355 * addresses. This way if we don't get a bind we by default pick a ephemeral 2356 * port with all addresses bound. 2357 */ 2358 int 2359 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2360 { 2361 /* 2362 * we get called when a new endpoint starts up. We need to allocate 2363 * the sctp_inpcb structure from the zone and init it. Mark it as 2364 * unbound and find a port that we can use as an ephemeral with 2365 * INADDR_ANY. If the user binds later no problem we can then add in 2366 * the specific addresses. And setup the default parameters for the 2367 * EP. 2368 */ 2369 int i, error; 2370 struct sctp_inpcb *inp; 2371 struct sctp_pcb *m; 2372 struct timeval time; 2373 sctp_sharedkey_t *null_key; 2374 2375 error = 0; 2376 2377 SCTP_INP_INFO_WLOCK(); 2378 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2379 if (inp == NULL) { 2380 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2381 SCTP_INP_INFO_WUNLOCK(); 2382 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2383 return (ENOBUFS); 2384 } 2385 /* zap it */ 2386 bzero(inp, sizeof(*inp)); 2387 2388 /* bump generations */ 2389 /* setup socket pointers */ 2390 inp->sctp_socket = so; 2391 inp->ip_inp.inp.inp_socket = so; 2392 inp->sctp_associd_counter = 1; 2393 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2394 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2395 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2396 /* init the small hash table we use to track asocid <-> tcb */ 2397 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2398 if (inp->sctp_asocidhash == NULL) { 2399 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2400 SCTP_INP_INFO_WUNLOCK(); 2401 return (ENOBUFS); 2402 } 2403 #ifdef IPSEC 2404 { 2405 struct inpcbpolicy *pcb_sp = NULL; 2406 2407 error = ipsec_init_policy(so, &pcb_sp); 2408 /* Arrange to share the policy */ 2409 inp->ip_inp.inp.inp_sp = pcb_sp; 2410 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2411 } 2412 if (error != 0) { 2413 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2414 SCTP_INP_INFO_WUNLOCK(); 2415 return error; 2416 } 2417 #endif /* IPSEC */ 2418 SCTP_INCR_EP_COUNT(); 2419 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2420 SCTP_INP_INFO_WUNLOCK(); 2421 2422 so->so_pcb = (caddr_t)inp; 2423 2424 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 2425 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 2426 /* UDP style socket */ 2427 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2428 SCTP_PCB_FLAGS_UNBOUND); 2429 /* Be sure it is NON-BLOCKING IO for UDP */ 2430 /* SCTP_SET_SO_NBIO(so); */ 2431 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2432 /* TCP style socket */ 2433 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2434 SCTP_PCB_FLAGS_UNBOUND); 2435 /* Be sure we have blocking IO by default */ 2436 SCTP_CLEAR_SO_NBIO(so); 2437 } else { 2438 /* 2439 * unsupported socket type (RAW, etc)- in case we missed it 2440 * in protosw 2441 */ 2442 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2443 so->so_pcb = NULL; 2444 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2445 return (EOPNOTSUPP); 2446 } 2447 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2448 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2449 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2450 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2451 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2452 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2453 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2454 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2455 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2456 } 2457 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2458 &inp->sctp_hashmark); 2459 if (inp->sctp_tcbhash == NULL) { 2460 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2461 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2462 so->so_pcb = NULL; 2463 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2464 return (ENOBUFS); 2465 } 2466 inp->def_vrf_id = vrf_id; 2467 2468 SCTP_INP_INFO_WLOCK(); 2469 SCTP_INP_LOCK_INIT(inp); 2470 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2471 SCTP_INP_READ_INIT(inp); 2472 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2473 /* lock the new ep */ 2474 SCTP_INP_WLOCK(inp); 2475 2476 /* add it to the info area */ 2477 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2478 SCTP_INP_INFO_WUNLOCK(); 2479 2480 TAILQ_INIT(&inp->read_queue); 2481 LIST_INIT(&inp->sctp_addr_list); 2482 2483 LIST_INIT(&inp->sctp_asoc_list); 2484 2485 #ifdef SCTP_TRACK_FREED_ASOCS 2486 /* TEMP CODE */ 2487 LIST_INIT(&inp->sctp_asoc_free_list); 2488 #endif 2489 /* Init the timer structure for signature change */ 2490 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2491 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2492 2493 /* now init the actual endpoint default data */ 2494 m = &inp->sctp_ep; 2495 2496 /* setup the base timeout information */ 2497 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2498 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2499 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2500 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2501 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2502 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2503 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2504 /* all max/min max are in ms */ 2505 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2506 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2507 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2508 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2509 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2510 2511 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2512 2513 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2514 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2515 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2516 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2517 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2518 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2519 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2520 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2521 /* number of streams to pre-open on a association */ 2522 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2523 2524 /* Add adaptation cookie */ 2525 m->adaptation_layer_indicator = 0x504C5253; 2526 2527 /* seed random number generator */ 2528 m->random_counter = 1; 2529 m->store_at = SCTP_SIGNATURE_SIZE; 2530 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2531 sctp_fill_random_store(m); 2532 2533 /* Minimum cookie size */ 2534 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2535 sizeof(struct sctp_state_cookie); 2536 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2537 2538 /* Setup the initial secret */ 2539 (void)SCTP_GETTIME_TIMEVAL(&time); 2540 m->time_of_secret_change = time.tv_sec; 2541 2542 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2543 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2544 } 2545 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2546 2547 /* How long is a cookie good for ? */ 2548 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2549 /* 2550 * Initialize authentication parameters 2551 */ 2552 m->local_hmacs = sctp_default_supported_hmaclist(); 2553 m->local_auth_chunks = sctp_alloc_chunklist(); 2554 sctp_auth_set_default_chunks(m->local_auth_chunks); 2555 LIST_INIT(&m->shared_keys); 2556 /* add default NULL key as key id 0 */ 2557 null_key = sctp_alloc_sharedkey(); 2558 sctp_insert_sharedkey(&m->shared_keys, null_key); 2559 SCTP_INP_WUNLOCK(inp); 2560 #ifdef SCTP_LOG_CLOSING 2561 sctp_log_closing(inp, NULL, 12); 2562 #endif 2563 return (error); 2564 } 2565 2566 2567 void 2568 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2569 struct sctp_tcb *stcb) 2570 { 2571 struct sctp_nets *net; 2572 uint16_t lport, rport; 2573 struct sctppcbhead *head; 2574 struct sctp_laddr *laddr, *oladdr; 2575 2576 atomic_add_int(&stcb->asoc.refcnt, 1); 2577 SCTP_TCB_UNLOCK(stcb); 2578 SCTP_INP_INFO_WLOCK(); 2579 SCTP_INP_WLOCK(old_inp); 2580 SCTP_INP_WLOCK(new_inp); 2581 SCTP_TCB_LOCK(stcb); 2582 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2583 2584 new_inp->sctp_ep.time_of_secret_change = 2585 old_inp->sctp_ep.time_of_secret_change; 2586 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2587 sizeof(old_inp->sctp_ep.secret_key)); 2588 new_inp->sctp_ep.current_secret_number = 2589 old_inp->sctp_ep.current_secret_number; 2590 new_inp->sctp_ep.last_secret_number = 2591 old_inp->sctp_ep.last_secret_number; 2592 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2593 2594 /* make it so new data pours into the new socket */ 2595 stcb->sctp_socket = new_inp->sctp_socket; 2596 stcb->sctp_ep = new_inp; 2597 2598 /* Copy the port across */ 2599 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2600 rport = stcb->rport; 2601 /* Pull the tcb from the old association */ 2602 LIST_REMOVE(stcb, sctp_tcbhash); 2603 LIST_REMOVE(stcb, sctp_tcblist); 2604 if (stcb->asoc.in_asocid_hash) { 2605 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2606 } 2607 /* Now insert the new_inp into the TCP connected hash */ 2608 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2609 2610 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2611 /* Its safe to access */ 2612 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2613 2614 /* Now move the tcb into the endpoint list */ 2615 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2616 /* 2617 * Question, do we even need to worry about the ep-hash since we 2618 * only have one connection? Probably not :> so lets get rid of it 2619 * and not suck up any kernel memory in that. 2620 */ 2621 if (stcb->asoc.in_asocid_hash) { 2622 struct sctpasochead *lhd; 2623 2624 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2625 new_inp->hashasocidmark)]; 2626 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2627 } 2628 /* Ok. Let's restart timer. */ 2629 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2630 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2631 stcb, net); 2632 } 2633 2634 SCTP_INP_INFO_WUNLOCK(); 2635 if (new_inp->sctp_tcbhash != NULL) { 2636 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2637 new_inp->sctp_tcbhash = NULL; 2638 } 2639 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2640 /* Subset bound, so copy in the laddr list from the old_inp */ 2641 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2642 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2643 if (laddr == NULL) { 2644 /* 2645 * Gak, what can we do? This assoc is really 2646 * HOSED. We probably should send an abort 2647 * here. 2648 */ 2649 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2650 continue; 2651 } 2652 SCTP_INCR_LADDR_COUNT(); 2653 bzero(laddr, sizeof(*laddr)); 2654 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2655 laddr->ifa = oladdr->ifa; 2656 atomic_add_int(&laddr->ifa->refcount, 1); 2657 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2658 sctp_nxt_addr); 2659 new_inp->laddr_count++; 2660 } 2661 } 2662 /* 2663 * Now any running timers need to be adjusted since we really don't 2664 * care if they are running or not just blast in the new_inp into 2665 * all of them. 2666 */ 2667 2668 stcb->asoc.hb_timer.ep = (void *)new_inp; 2669 stcb->asoc.dack_timer.ep = (void *)new_inp; 2670 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2671 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2672 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2673 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2674 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2675 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2676 /* now what about the nets? */ 2677 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2678 net->pmtu_timer.ep = (void *)new_inp; 2679 net->rxt_timer.ep = (void *)new_inp; 2680 net->fr_timer.ep = (void *)new_inp; 2681 } 2682 SCTP_INP_WUNLOCK(new_inp); 2683 SCTP_INP_WUNLOCK(old_inp); 2684 } 2685 2686 2687 2688 2689 /* sctp_ifap is used to bypass normal local address validation checks */ 2690 int 2691 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2692 struct sctp_ifa *sctp_ifap, struct thread *p) 2693 { 2694 /* bind a ep to a socket address */ 2695 struct sctppcbhead *head; 2696 struct sctp_inpcb *inp, *inp_tmp; 2697 struct inpcb *ip_inp; 2698 int port_reuse_active = 0; 2699 int bindall; 2700 uint16_t lport; 2701 int error; 2702 uint32_t vrf_id; 2703 2704 lport = 0; 2705 error = 0; 2706 bindall = 1; 2707 inp = (struct sctp_inpcb *)so->so_pcb; 2708 ip_inp = (struct inpcb *)so->so_pcb; 2709 #ifdef SCTP_DEBUG 2710 if (addr) { 2711 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2712 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2713 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2714 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2715 } 2716 #endif 2717 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2718 /* already did a bind, subsequent binds NOT allowed ! */ 2719 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2720 return (EINVAL); 2721 } 2722 #ifdef INVARIANTS 2723 if (p == NULL) 2724 panic("null proc/thread"); 2725 #endif 2726 if (addr != NULL) { 2727 switch (addr->sa_family) { 2728 case AF_INET: 2729 { 2730 struct sockaddr_in *sin; 2731 2732 /* IPV6_V6ONLY socket? */ 2733 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2734 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2735 return (EINVAL); 2736 } 2737 if (addr->sa_len != sizeof(*sin)) { 2738 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2739 return (EINVAL); 2740 } 2741 sin = (struct sockaddr_in *)addr; 2742 lport = sin->sin_port; 2743 /* 2744 * For LOOPBACK the prison_local_ip4() call 2745 * will transmute the ip address to the 2746 * proper value. 2747 */ 2748 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2749 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2750 return (error); 2751 } 2752 if (sin->sin_addr.s_addr != INADDR_ANY) { 2753 bindall = 0; 2754 } 2755 break; 2756 } 2757 #ifdef INET6 2758 case AF_INET6: 2759 { 2760 /* 2761 * Only for pure IPv6 Address. (No IPv4 2762 * Mapped!) 2763 */ 2764 struct sockaddr_in6 *sin6; 2765 2766 sin6 = (struct sockaddr_in6 *)addr; 2767 2768 if (addr->sa_len != sizeof(*sin6)) { 2769 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2770 return (EINVAL); 2771 } 2772 lport = sin6->sin6_port; 2773 2774 /* 2775 * For LOOPBACK the prison_local_ip6() call 2776 * will transmute the ipv6 address to the 2777 * proper value. 2778 */ 2779 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2780 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2781 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2782 return (error); 2783 } 2784 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2785 bindall = 0; 2786 /* KAME hack: embed scopeid */ 2787 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2788 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2789 return (EINVAL); 2790 } 2791 } 2792 /* this must be cleared for ifa_ifwithaddr() */ 2793 sin6->sin6_scope_id = 0; 2794 break; 2795 } 2796 #endif 2797 default: 2798 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2799 return (EAFNOSUPPORT); 2800 } 2801 } 2802 SCTP_INP_INFO_WLOCK(); 2803 SCTP_INP_WLOCK(inp); 2804 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2805 vrf_id = inp->def_vrf_id; 2806 2807 /* increase our count due to the unlock we do */ 2808 SCTP_INP_INCR_REF(inp); 2809 if (lport) { 2810 /* 2811 * Did the caller specify a port? if so we must see if a ep 2812 * already has this one bound. 2813 */ 2814 /* got to be root to get at low ports */ 2815 if (ntohs(lport) < IPPORT_RESERVED) { 2816 if (p && (error = 2817 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2818 )) { 2819 SCTP_INP_DECR_REF(inp); 2820 SCTP_INP_WUNLOCK(inp); 2821 SCTP_INP_INFO_WUNLOCK(); 2822 return (error); 2823 } 2824 } 2825 if (p == NULL) { 2826 SCTP_INP_DECR_REF(inp); 2827 SCTP_INP_WUNLOCK(inp); 2828 SCTP_INP_INFO_WUNLOCK(); 2829 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2830 return (error); 2831 } 2832 SCTP_INP_WUNLOCK(inp); 2833 if (bindall) { 2834 vrf_id = inp->def_vrf_id; 2835 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2836 if (inp_tmp != NULL) { 2837 /* 2838 * lock guy returned and lower count note 2839 * that we are not bound so inp_tmp should 2840 * NEVER be inp. And it is this inp 2841 * (inp_tmp) that gets the reference bump, 2842 * so we must lower it. 2843 */ 2844 SCTP_INP_DECR_REF(inp_tmp); 2845 /* unlock info */ 2846 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2847 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2848 /* 2849 * Ok, must be one-2-one and 2850 * allowing port re-use 2851 */ 2852 port_reuse_active = 1; 2853 goto continue_anyway; 2854 } 2855 SCTP_INP_DECR_REF(inp); 2856 SCTP_INP_INFO_WUNLOCK(); 2857 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2858 return (EADDRINUSE); 2859 } 2860 } else { 2861 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2862 if (inp_tmp != NULL) { 2863 /* 2864 * lock guy returned and lower count note 2865 * that we are not bound so inp_tmp should 2866 * NEVER be inp. And it is this inp 2867 * (inp_tmp) that gets the reference bump, 2868 * so we must lower it. 2869 */ 2870 SCTP_INP_DECR_REF(inp_tmp); 2871 /* unlock info */ 2872 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2873 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2874 /* 2875 * Ok, must be one-2-one and 2876 * allowing port re-use 2877 */ 2878 port_reuse_active = 1; 2879 goto continue_anyway; 2880 } 2881 SCTP_INP_DECR_REF(inp); 2882 SCTP_INP_INFO_WUNLOCK(); 2883 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2884 return (EADDRINUSE); 2885 } 2886 } 2887 continue_anyway: 2888 SCTP_INP_WLOCK(inp); 2889 if (bindall) { 2890 /* verify that no lport is not used by a singleton */ 2891 if ((port_reuse_active == 0) && 2892 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2893 ) { 2894 /* Sorry someone already has this one bound */ 2895 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2896 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2897 port_reuse_active = 1; 2898 } else { 2899 SCTP_INP_DECR_REF(inp); 2900 SCTP_INP_WUNLOCK(inp); 2901 SCTP_INP_INFO_WUNLOCK(); 2902 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2903 return (EADDRINUSE); 2904 } 2905 } 2906 } 2907 } else { 2908 uint16_t first, last, candidate; 2909 uint16_t count; 2910 int done; 2911 2912 if (ip_inp->inp_flags & INP_HIGHPORT) { 2913 first = MODULE_GLOBAL(ipport_hifirstauto); 2914 last = MODULE_GLOBAL(ipport_hilastauto); 2915 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2916 if (p && (error = 2917 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2918 )) { 2919 SCTP_INP_DECR_REF(inp); 2920 SCTP_INP_WUNLOCK(inp); 2921 SCTP_INP_INFO_WUNLOCK(); 2922 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2923 return (error); 2924 } 2925 first = MODULE_GLOBAL(ipport_lowfirstauto); 2926 last = MODULE_GLOBAL(ipport_lowlastauto); 2927 } else { 2928 first = MODULE_GLOBAL(ipport_firstauto); 2929 last = MODULE_GLOBAL(ipport_lastauto); 2930 } 2931 if (first > last) { 2932 uint16_t temp; 2933 2934 temp = first; 2935 first = last; 2936 last = temp; 2937 } 2938 count = last - first + 1; /* number of candidates */ 2939 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2940 2941 done = 0; 2942 while (!done) { 2943 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2944 done = 1; 2945 } 2946 if (!done) { 2947 if (--count == 0) { 2948 SCTP_INP_DECR_REF(inp); 2949 SCTP_INP_WUNLOCK(inp); 2950 SCTP_INP_INFO_WUNLOCK(); 2951 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2952 return (EADDRINUSE); 2953 } 2954 if (candidate == last) 2955 candidate = first; 2956 else 2957 candidate = candidate + 1; 2958 } 2959 } 2960 lport = htons(candidate); 2961 } 2962 SCTP_INP_DECR_REF(inp); 2963 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2964 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2965 /* 2966 * this really should not happen. The guy did a non-blocking 2967 * bind and then did a close at the same time. 2968 */ 2969 SCTP_INP_WUNLOCK(inp); 2970 SCTP_INP_INFO_WUNLOCK(); 2971 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2972 return (EINVAL); 2973 } 2974 /* ok we look clear to give out this port, so lets setup the binding */ 2975 if (bindall) { 2976 /* binding to all addresses, so just set in the proper flags */ 2977 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2978 /* set the automatic addr changes from kernel flag */ 2979 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2980 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2981 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2982 } else { 2983 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2984 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2985 } 2986 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2987 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2988 } else { 2989 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2990 } 2991 /* 2992 * set the automatic mobility_base from kernel flag (by 2993 * micchie) 2994 */ 2995 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 2996 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 2997 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2998 } else { 2999 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3000 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3001 } 3002 /* 3003 * set the automatic mobility_fasthandoff from kernel flag 3004 * (by micchie) 3005 */ 3006 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3007 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3008 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3009 } else { 3010 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3011 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3012 } 3013 } else { 3014 /* 3015 * bind specific, make sure flags is off and add a new 3016 * address structure to the sctp_addr_list inside the ep 3017 * structure. 3018 * 3019 * We will need to allocate one and insert it at the head. The 3020 * socketopt call can just insert new addresses in there as 3021 * well. It will also have to do the embed scope kame hack 3022 * too (before adding). 3023 */ 3024 struct sctp_ifa *ifa; 3025 struct sockaddr_storage store_sa; 3026 3027 memset(&store_sa, 0, sizeof(store_sa)); 3028 if (addr->sa_family == AF_INET) { 3029 struct sockaddr_in *sin; 3030 3031 sin = (struct sockaddr_in *)&store_sa; 3032 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3033 sin->sin_port = 0; 3034 } else if (addr->sa_family == AF_INET6) { 3035 struct sockaddr_in6 *sin6; 3036 3037 sin6 = (struct sockaddr_in6 *)&store_sa; 3038 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3039 sin6->sin6_port = 0; 3040 } 3041 /* 3042 * first find the interface with the bound address need to 3043 * zero out the port to find the address! yuck! can't do 3044 * this earlier since need port for sctp_pcb_findep() 3045 */ 3046 if (sctp_ifap != NULL) 3047 ifa = sctp_ifap; 3048 else { 3049 /* 3050 * Note for BSD we hit here always other O/S's will 3051 * pass things in via the sctp_ifap argument 3052 * (Panda). 3053 */ 3054 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3055 vrf_id, SCTP_ADDR_NOT_LOCKED); 3056 } 3057 if (ifa == NULL) { 3058 /* Can't find an interface with that address */ 3059 SCTP_INP_WUNLOCK(inp); 3060 SCTP_INP_INFO_WUNLOCK(); 3061 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3062 return (EADDRNOTAVAIL); 3063 } 3064 if (addr->sa_family == AF_INET6) { 3065 /* GAK, more FIXME IFA lock? */ 3066 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3067 /* Can't bind a non-existent addr. */ 3068 SCTP_INP_WUNLOCK(inp); 3069 SCTP_INP_INFO_WUNLOCK(); 3070 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3071 return (EINVAL); 3072 } 3073 } 3074 /* we're not bound all */ 3075 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3076 /* allow bindx() to send ASCONF's for binding changes */ 3077 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3078 /* clear automatic addr changes from kernel flag */ 3079 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3080 3081 /* add this address to the endpoint list */ 3082 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3083 if (error != 0) { 3084 SCTP_INP_WUNLOCK(inp); 3085 SCTP_INP_INFO_WUNLOCK(); 3086 return (error); 3087 } 3088 inp->laddr_count++; 3089 } 3090 /* find the bucket */ 3091 if (port_reuse_active) { 3092 /* Put it into tcp 1-2-1 hash */ 3093 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3094 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3095 } else { 3096 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 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 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3153 if (it->vn != curvnet) { 3154 continue; 3155 } 3156 if (it->inp == inp) { 3157 /* This one points to me is it inp specific? */ 3158 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3159 /* Remove and free this one */ 3160 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3161 it, sctp_nxt_itr); 3162 if (it->function_atend != NULL) { 3163 (*it->function_atend) (it->pointer, it->val); 3164 } 3165 SCTP_FREE(it, SCTP_M_ITER); 3166 } else { 3167 it->inp = LIST_NEXT(it->inp, sctp_list); 3168 if (it->inp) { 3169 SCTP_INP_INCR_REF(it->inp); 3170 } 3171 } 3172 /* 3173 * When its put in the refcnt is incremented so decr 3174 * it 3175 */ 3176 SCTP_INP_DECR_REF(inp); 3177 } 3178 } 3179 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3180 } 3181 3182 /* release sctp_inpcb unbind the port */ 3183 void 3184 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3185 { 3186 /* 3187 * Here we free a endpoint. We must find it (if it is in the Hash 3188 * table) and remove it from there. Then we must also find it in the 3189 * overall list and remove it from there. After all removals are 3190 * complete then any timer has to be stopped. Then start the actual 3191 * freeing. a) Any local lists. b) Any associations. c) The hash of 3192 * all associations. d) finally the ep itself. 3193 */ 3194 struct sctp_pcb *m; 3195 struct sctp_tcb *asoc, *nasoc; 3196 struct sctp_laddr *laddr, *nladdr; 3197 struct inpcb *ip_pcb; 3198 struct socket *so; 3199 int being_refed = 0; 3200 struct sctp_queued_to_read *sq, *nsq; 3201 int cnt; 3202 sctp_sharedkey_t *shared_key, *nshared_key; 3203 3204 3205 #ifdef SCTP_LOG_CLOSING 3206 sctp_log_closing(inp, NULL, 0); 3207 #endif 3208 SCTP_ITERATOR_LOCK(); 3209 /* mark any iterators on the list or being processed */ 3210 sctp_iterator_inp_being_freed(inp); 3211 SCTP_ITERATOR_UNLOCK(); 3212 so = inp->sctp_socket; 3213 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3214 /* been here before.. eeks.. get out of here */ 3215 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3216 #ifdef SCTP_LOG_CLOSING 3217 sctp_log_closing(inp, NULL, 1); 3218 #endif 3219 return; 3220 } 3221 SCTP_ASOC_CREATE_LOCK(inp); 3222 SCTP_INP_INFO_WLOCK(); 3223 3224 SCTP_INP_WLOCK(inp); 3225 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3226 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3227 /* socket is gone, so no more wakeups allowed */ 3228 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3229 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3230 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3231 3232 } 3233 /* First time through we have the socket lock, after that no more. */ 3234 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3235 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3236 3237 if (inp->control) { 3238 sctp_m_freem(inp->control); 3239 inp->control = NULL; 3240 } 3241 if (inp->pkt) { 3242 sctp_m_freem(inp->pkt); 3243 inp->pkt = NULL; 3244 } 3245 m = &inp->sctp_ep; 3246 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3247 * here but I will be nice :> (i.e. 3248 * ip_pcb = ep;) */ 3249 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3250 int cnt_in_sd; 3251 3252 cnt_in_sd = 0; 3253 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3254 SCTP_TCB_LOCK(asoc); 3255 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3256 /* Skip guys being freed */ 3257 cnt_in_sd++; 3258 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3259 /* 3260 * Special case - we did not start a 3261 * kill timer on the asoc due to it 3262 * was not closed. So go ahead and 3263 * start it now. 3264 */ 3265 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3266 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3267 } 3268 SCTP_TCB_UNLOCK(asoc); 3269 continue; 3270 } 3271 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3272 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3273 (asoc->asoc.total_output_queue_size == 0)) { 3274 /* 3275 * If we have data in queue, we don't want 3276 * to just free since the app may have done, 3277 * send()/close or connect/send/close. And 3278 * it wants the data to get across first. 3279 */ 3280 /* Just abandon things in the front states */ 3281 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3282 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3283 cnt_in_sd++; 3284 } 3285 continue; 3286 } 3287 /* Disconnect the socket please */ 3288 asoc->sctp_socket = NULL; 3289 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3290 if ((asoc->asoc.size_on_reasm_queue > 0) || 3291 (asoc->asoc.control_pdapi) || 3292 (asoc->asoc.size_on_all_streams > 0) || 3293 (so && (so->so_rcv.sb_cc > 0)) 3294 ) { 3295 /* Left with Data unread */ 3296 struct mbuf *op_err; 3297 3298 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3299 0, M_DONTWAIT, 1, MT_DATA); 3300 if (op_err) { 3301 /* Fill in the user initiated abort */ 3302 struct sctp_paramhdr *ph; 3303 uint32_t *ippp; 3304 3305 SCTP_BUF_LEN(op_err) = 3306 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3307 ph = mtod(op_err, 3308 struct sctp_paramhdr *); 3309 ph->param_type = htons( 3310 SCTP_CAUSE_USER_INITIATED_ABT); 3311 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3312 ippp = (uint32_t *) (ph + 1); 3313 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3314 } 3315 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3316 #if defined(SCTP_PANIC_ON_ABORT) 3317 panic("inpcb_free does an abort"); 3318 #endif 3319 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3320 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3321 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3322 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3323 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3324 } 3325 if (sctp_free_assoc(inp, asoc, 3326 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3327 cnt_in_sd++; 3328 } 3329 continue; 3330 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3331 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3332 (asoc->asoc.stream_queue_cnt == 0) 3333 ) { 3334 if (asoc->asoc.locked_on_sending) { 3335 goto abort_anyway; 3336 } 3337 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3338 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3339 /* 3340 * there is nothing queued to send, 3341 * so I send shutdown 3342 */ 3343 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 3344 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3345 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3346 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3347 } 3348 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3349 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3350 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3351 asoc->asoc.primary_destination); 3352 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3353 asoc->asoc.primary_destination); 3354 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3355 } 3356 } else { 3357 /* mark into shutdown pending */ 3358 struct sctp_stream_queue_pending *sp; 3359 3360 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3361 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3362 asoc->asoc.primary_destination); 3363 if (asoc->asoc.locked_on_sending) { 3364 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3365 sctp_streamhead); 3366 if (sp == NULL) { 3367 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3368 asoc->asoc.locked_on_sending, 3369 asoc->asoc.locked_on_sending->stream_no); 3370 } else { 3371 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3372 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3373 } 3374 } 3375 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3376 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3377 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3378 struct mbuf *op_err; 3379 3380 abort_anyway: 3381 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3382 0, M_DONTWAIT, 1, MT_DATA); 3383 if (op_err) { 3384 /* 3385 * Fill in the user 3386 * initiated abort 3387 */ 3388 struct sctp_paramhdr *ph; 3389 uint32_t *ippp; 3390 3391 SCTP_BUF_LEN(op_err) = 3392 (sizeof(struct sctp_paramhdr) + 3393 sizeof(uint32_t)); 3394 ph = mtod(op_err, 3395 struct sctp_paramhdr *); 3396 ph->param_type = htons( 3397 SCTP_CAUSE_USER_INITIATED_ABT); 3398 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3399 ippp = (uint32_t *) (ph + 1); 3400 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3401 } 3402 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3403 #if defined(SCTP_PANIC_ON_ABORT) 3404 panic("inpcb_free does an abort"); 3405 #endif 3406 3407 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3408 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3409 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3410 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3411 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3412 } 3413 if (sctp_free_assoc(inp, asoc, 3414 SCTP_PCBFREE_NOFORCE, 3415 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3416 cnt_in_sd++; 3417 } 3418 continue; 3419 } else { 3420 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3421 } 3422 } 3423 cnt_in_sd++; 3424 SCTP_TCB_UNLOCK(asoc); 3425 } 3426 /* now is there some left in our SHUTDOWN state? */ 3427 if (cnt_in_sd) { 3428 #ifdef SCTP_LOG_CLOSING 3429 sctp_log_closing(inp, NULL, 2); 3430 #endif 3431 inp->sctp_socket = NULL; 3432 SCTP_INP_WUNLOCK(inp); 3433 SCTP_ASOC_CREATE_UNLOCK(inp); 3434 SCTP_INP_INFO_WUNLOCK(); 3435 return; 3436 } 3437 } 3438 inp->sctp_socket = NULL; 3439 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3440 SCTP_PCB_FLAGS_UNBOUND) { 3441 /* 3442 * ok, this guy has been bound. It's port is somewhere in 3443 * the SCTP_BASE_INFO(hash table). Remove it! 3444 */ 3445 LIST_REMOVE(inp, sctp_hash); 3446 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3447 } 3448 /* 3449 * If there is a timer running to kill us, forget it, since it may 3450 * have a contest on the INP lock.. which would cause us to die ... 3451 */ 3452 cnt = 0; 3453 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3454 SCTP_TCB_LOCK(asoc); 3455 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3456 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3457 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3458 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3459 } 3460 cnt++; 3461 SCTP_TCB_UNLOCK(asoc); 3462 continue; 3463 } 3464 /* Free associations that are NOT killing us */ 3465 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3466 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3467 struct mbuf *op_err; 3468 uint32_t *ippp; 3469 3470 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3471 0, M_DONTWAIT, 1, MT_DATA); 3472 if (op_err) { 3473 /* Fill in the user initiated abort */ 3474 struct sctp_paramhdr *ph; 3475 3476 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3477 sizeof(uint32_t)); 3478 ph = mtod(op_err, struct sctp_paramhdr *); 3479 ph->param_type = htons( 3480 SCTP_CAUSE_USER_INITIATED_ABT); 3481 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3482 ippp = (uint32_t *) (ph + 1); 3483 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3484 3485 } 3486 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3487 #if defined(SCTP_PANIC_ON_ABORT) 3488 panic("inpcb_free does an abort"); 3489 #endif 3490 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3491 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3492 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3493 cnt++; 3494 SCTP_TCB_UNLOCK(asoc); 3495 continue; 3496 } 3497 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3498 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3499 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3500 } 3501 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3502 cnt++; 3503 } 3504 } 3505 if (cnt) { 3506 /* Ok we have someone out there that will kill us */ 3507 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3508 #ifdef SCTP_LOG_CLOSING 3509 sctp_log_closing(inp, NULL, 3); 3510 #endif 3511 SCTP_INP_WUNLOCK(inp); 3512 SCTP_ASOC_CREATE_UNLOCK(inp); 3513 SCTP_INP_INFO_WUNLOCK(); 3514 return; 3515 } 3516 if (SCTP_INP_LOCK_CONTENDED(inp)) 3517 being_refed++; 3518 if (SCTP_INP_READ_CONTENDED(inp)) 3519 being_refed++; 3520 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3521 being_refed++; 3522 3523 if ((inp->refcount) || 3524 (being_refed) || 3525 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3526 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3527 #ifdef SCTP_LOG_CLOSING 3528 sctp_log_closing(inp, NULL, 4); 3529 #endif 3530 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3531 SCTP_INP_WUNLOCK(inp); 3532 SCTP_ASOC_CREATE_UNLOCK(inp); 3533 SCTP_INP_INFO_WUNLOCK(); 3534 return; 3535 } 3536 inp->sctp_ep.signature_change.type = 0; 3537 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3538 /* 3539 * Remove it from the list .. last thing we need a lock for. 3540 */ 3541 LIST_REMOVE(inp, sctp_list); 3542 SCTP_INP_WUNLOCK(inp); 3543 SCTP_ASOC_CREATE_UNLOCK(inp); 3544 SCTP_INP_INFO_WUNLOCK(); 3545 /* 3546 * Now we release all locks. Since this INP cannot be found anymore 3547 * except possibly by the kill timer that might be running. We call 3548 * the drain function here. It should hit the case were it sees the 3549 * ACTIVE flag cleared and exit out freeing us to proceed and 3550 * destroy everything. 3551 */ 3552 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3553 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3554 } else { 3555 /* Probably un-needed */ 3556 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3557 } 3558 3559 #ifdef SCTP_LOG_CLOSING 3560 sctp_log_closing(inp, NULL, 5); 3561 #endif 3562 3563 3564 if ((inp->sctp_asocidhash) != NULL) { 3565 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3566 inp->sctp_asocidhash = NULL; 3567 } 3568 /* sa_ignore FREED_MEMORY */ 3569 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3570 /* Its only abandoned if it had data left */ 3571 if (sq->length) 3572 SCTP_STAT_INCR(sctps_left_abandon); 3573 3574 TAILQ_REMOVE(&inp->read_queue, sq, next); 3575 sctp_free_remote_addr(sq->whoFrom); 3576 if (so) 3577 so->so_rcv.sb_cc -= sq->length; 3578 if (sq->data) { 3579 sctp_m_freem(sq->data); 3580 sq->data = NULL; 3581 } 3582 /* 3583 * no need to free the net count, since at this point all 3584 * assoc's are gone. 3585 */ 3586 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3587 SCTP_DECR_READQ_COUNT(); 3588 } 3589 /* Now the sctp_pcb things */ 3590 /* 3591 * free each asoc if it is not already closed/free. we can't use the 3592 * macro here since le_next will get freed as part of the 3593 * sctp_free_assoc() call. 3594 */ 3595 cnt = 0; 3596 if (so) { 3597 #ifdef IPSEC 3598 ipsec_delete_pcbpolicy(ip_pcb); 3599 #endif /* IPSEC */ 3600 3601 /* Unlocks not needed since the socket is gone now */ 3602 } 3603 if (ip_pcb->inp_options) { 3604 (void)sctp_m_free(ip_pcb->inp_options); 3605 ip_pcb->inp_options = 0; 3606 } 3607 if (ip_pcb->inp_moptions) { 3608 inp_freemoptions(ip_pcb->inp_moptions); 3609 ip_pcb->inp_moptions = 0; 3610 } 3611 #ifdef INET6 3612 if (ip_pcb->inp_vflag & INP_IPV6) { 3613 struct in6pcb *in6p; 3614 3615 in6p = (struct in6pcb *)inp; 3616 ip6_freepcbopts(in6p->in6p_outputopts); 3617 } 3618 #endif /* INET6 */ 3619 ip_pcb->inp_vflag = 0; 3620 /* free up authentication fields */ 3621 if (inp->sctp_ep.local_auth_chunks != NULL) 3622 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3623 if (inp->sctp_ep.local_hmacs != NULL) 3624 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3625 3626 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3627 LIST_REMOVE(shared_key, next); 3628 sctp_free_sharedkey(shared_key); 3629 /* sa_ignore FREED_MEMORY */ 3630 } 3631 3632 /* 3633 * if we have an address list the following will free the list of 3634 * ifaddr's that are set into this ep. Again macro limitations here, 3635 * since the LIST_FOREACH could be a bad idea. 3636 */ 3637 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3638 sctp_remove_laddr(laddr); 3639 } 3640 3641 #ifdef SCTP_TRACK_FREED_ASOCS 3642 /* TEMP CODE */ 3643 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3644 LIST_REMOVE(asoc, sctp_tcblist); 3645 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3646 SCTP_DECR_ASOC_COUNT(); 3647 } 3648 /* *** END TEMP CODE *** */ 3649 #endif 3650 /* Now lets see about freeing the EP hash table. */ 3651 if (inp->sctp_tcbhash != NULL) { 3652 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3653 inp->sctp_tcbhash = NULL; 3654 } 3655 /* Now we must put the ep memory back into the zone pool */ 3656 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3657 SCTP_INP_LOCK_DESTROY(inp); 3658 SCTP_INP_READ_DESTROY(inp); 3659 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3660 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3661 SCTP_DECR_EP_COUNT(); 3662 } 3663 3664 3665 struct sctp_nets * 3666 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3667 { 3668 struct sctp_nets *net; 3669 3670 /* locate the address */ 3671 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3672 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3673 return (net); 3674 } 3675 return (NULL); 3676 } 3677 3678 3679 int 3680 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3681 { 3682 struct sctp_ifa *sctp_ifa; 3683 3684 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3685 if (sctp_ifa) { 3686 return (1); 3687 } else { 3688 return (0); 3689 } 3690 } 3691 3692 /* 3693 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3694 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3695 * stats of stuff. 3696 */ 3697 int 3698 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3699 int set_scope, int from) 3700 { 3701 /* 3702 * The following is redundant to the same lines in the 3703 * sctp_aloc_assoc() but is needed since others call the add address 3704 * function 3705 */ 3706 struct sctp_nets *net, *netfirst; 3707 int addr_inscope; 3708 3709 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3710 from); 3711 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3712 3713 netfirst = sctp_findnet(stcb, newaddr); 3714 if (netfirst) { 3715 /* 3716 * Lie and return ok, we don't want to make the association 3717 * go away for this behavior. It will happen in the TCP 3718 * model in a connected socket. It does not reach the hash 3719 * table until after the association is built so it can't be 3720 * found. Mark as reachable, since the initial creation will 3721 * have been cleared and the NOT_IN_ASSOC flag will have 3722 * been added... and we don't want to end up removing it 3723 * back out. 3724 */ 3725 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3726 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3727 SCTP_ADDR_UNCONFIRMED); 3728 } else { 3729 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3730 } 3731 3732 return (0); 3733 } 3734 addr_inscope = 1; 3735 if (newaddr->sa_family == AF_INET) { 3736 struct sockaddr_in *sin; 3737 3738 sin = (struct sockaddr_in *)newaddr; 3739 if (sin->sin_addr.s_addr == 0) { 3740 /* Invalid address */ 3741 return (-1); 3742 } 3743 /* zero out the bzero area */ 3744 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3745 3746 /* assure len is set */ 3747 sin->sin_len = sizeof(struct sockaddr_in); 3748 if (set_scope) { 3749 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3750 stcb->ipv4_local_scope = 1; 3751 #else 3752 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3753 stcb->asoc.ipv4_local_scope = 1; 3754 } 3755 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3756 } else { 3757 /* Validate the address is in scope */ 3758 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3759 (stcb->asoc.ipv4_local_scope == 0)) { 3760 addr_inscope = 0; 3761 } 3762 } 3763 #ifdef INET6 3764 } else if (newaddr->sa_family == AF_INET6) { 3765 struct sockaddr_in6 *sin6; 3766 3767 sin6 = (struct sockaddr_in6 *)newaddr; 3768 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3769 /* Invalid address */ 3770 return (-1); 3771 } 3772 /* assure len is set */ 3773 sin6->sin6_len = sizeof(struct sockaddr_in6); 3774 if (set_scope) { 3775 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3776 stcb->asoc.loopback_scope = 1; 3777 stcb->asoc.local_scope = 0; 3778 stcb->asoc.ipv4_local_scope = 1; 3779 stcb->asoc.site_scope = 1; 3780 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3781 /* 3782 * If the new destination is a LINK_LOCAL we 3783 * must have common site scope. Don't set 3784 * the local scope since we may not share 3785 * all links, only loopback can do this. 3786 * Links on the local network would also be 3787 * on our private network for v4 too. 3788 */ 3789 stcb->asoc.ipv4_local_scope = 1; 3790 stcb->asoc.site_scope = 1; 3791 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3792 /* 3793 * If the new destination is SITE_LOCAL then 3794 * we must have site scope in common. 3795 */ 3796 stcb->asoc.site_scope = 1; 3797 } 3798 } else { 3799 /* Validate the address is in scope */ 3800 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3801 (stcb->asoc.loopback_scope == 0)) { 3802 addr_inscope = 0; 3803 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3804 (stcb->asoc.local_scope == 0)) { 3805 addr_inscope = 0; 3806 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3807 (stcb->asoc.site_scope == 0)) { 3808 addr_inscope = 0; 3809 } 3810 } 3811 #endif 3812 } else { 3813 /* not supported family type */ 3814 return (-1); 3815 } 3816 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3817 if (net == NULL) { 3818 return (-1); 3819 } 3820 SCTP_INCR_RADDR_COUNT(); 3821 bzero(net, sizeof(*net)); 3822 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3823 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3824 if (newaddr->sa_family == AF_INET) { 3825 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3826 } else if (newaddr->sa_family == AF_INET6) { 3827 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3828 } 3829 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3830 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3831 stcb->asoc.loopback_scope = 1; 3832 stcb->asoc.ipv4_local_scope = 1; 3833 stcb->asoc.local_scope = 0; 3834 stcb->asoc.site_scope = 1; 3835 addr_inscope = 1; 3836 } 3837 net->failure_threshold = stcb->asoc.def_net_failure; 3838 if (addr_inscope == 0) { 3839 net->dest_state = (SCTP_ADDR_REACHABLE | 3840 SCTP_ADDR_OUT_OF_SCOPE); 3841 } else { 3842 if (from == SCTP_ADDR_IS_CONFIRMED) 3843 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3844 net->dest_state = SCTP_ADDR_REACHABLE; 3845 else 3846 net->dest_state = SCTP_ADDR_REACHABLE | 3847 SCTP_ADDR_UNCONFIRMED; 3848 } 3849 /* 3850 * We set this to 0, the timer code knows that this means its an 3851 * initial value 3852 */ 3853 net->RTO = 0; 3854 net->RTO_measured = 0; 3855 stcb->asoc.numnets++; 3856 *(&net->ref_count) = 1; 3857 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3858 net->tos_flowlabel = 0; 3859 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 3860 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 3861 } else { 3862 net->port = 0; 3863 } 3864 #ifdef INET 3865 if (newaddr->sa_family == AF_INET) 3866 net->tos_flowlabel = stcb->asoc.default_tos; 3867 #endif 3868 #ifdef INET6 3869 if (newaddr->sa_family == AF_INET6) 3870 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3871 #endif 3872 /* Init the timer structure */ 3873 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3874 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3875 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3876 3877 /* Now generate a route for this guy */ 3878 #ifdef INET6 3879 /* KAME hack: embed scopeid */ 3880 if (newaddr->sa_family == AF_INET6) { 3881 struct sockaddr_in6 *sin6; 3882 3883 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3884 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3885 sin6->sin6_scope_id = 0; 3886 } 3887 #endif 3888 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3889 3890 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3891 /* Get source address */ 3892 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3893 stcb, 3894 (sctp_route_t *) & net->ro, 3895 net, 3896 0, 3897 stcb->asoc.vrf_id); 3898 /* Now get the interface MTU */ 3899 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3900 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3901 } else { 3902 net->mtu = 0; 3903 } 3904 if (net->mtu == 0) { 3905 /* Huh ?? */ 3906 net->mtu = SCTP_DEFAULT_MTU; 3907 } else { 3908 uint32_t rmtu; 3909 3910 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3911 if (rmtu == 0) { 3912 /* 3913 * Start things off to match mtu of 3914 * interface please. 3915 */ 3916 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3917 net->ro.ro_rt, net->mtu); 3918 } else { 3919 /* 3920 * we take the route mtu over the interface, 3921 * since the route may be leading out the 3922 * loopback, or a different interface. 3923 */ 3924 net->mtu = rmtu; 3925 } 3926 } 3927 if (from == SCTP_ALLOC_ASOC) { 3928 stcb->asoc.smallest_mtu = net->mtu; 3929 } 3930 } else { 3931 net->mtu = stcb->asoc.smallest_mtu; 3932 } 3933 #ifdef INET6 3934 if (newaddr->sa_family == AF_INET6) { 3935 struct sockaddr_in6 *sin6; 3936 3937 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3938 (void)sa6_recoverscope(sin6); 3939 } 3940 #endif 3941 if (net->port) { 3942 net->mtu -= sizeof(struct udphdr); 3943 } 3944 if (stcb->asoc.smallest_mtu > net->mtu) { 3945 stcb->asoc.smallest_mtu = net->mtu; 3946 } 3947 /* JRS - Use the congestion control given in the CC module */ 3948 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 3949 3950 /* 3951 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3952 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3953 */ 3954 net->find_pseudo_cumack = 1; 3955 net->find_rtx_pseudo_cumack = 1; 3956 net->src_addr_selected = 0; 3957 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3958 if (net->ro.ro_rt == NULL) { 3959 /* Since we have no route put it at the back */ 3960 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3961 } else if (netfirst == NULL) { 3962 /* We are the first one in the pool. */ 3963 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3964 } else if (netfirst->ro.ro_rt == NULL) { 3965 /* 3966 * First one has NO route. Place this one ahead of the first 3967 * one. 3968 */ 3969 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3970 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3971 /* 3972 * This one has a different interface than the one at the 3973 * top of the list. Place it ahead. 3974 */ 3975 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3976 } else { 3977 /* 3978 * Ok we have the same interface as the first one. Move 3979 * forward until we find either a) one with a NULL route... 3980 * insert ahead of that b) one with a different ifp.. insert 3981 * after that. c) end of the list.. insert at the tail. 3982 */ 3983 struct sctp_nets *netlook; 3984 3985 do { 3986 netlook = TAILQ_NEXT(netfirst, sctp_next); 3987 if (netlook == NULL) { 3988 /* End of the list */ 3989 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3990 break; 3991 } else if (netlook->ro.ro_rt == NULL) { 3992 /* next one has NO route */ 3993 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 3994 break; 3995 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 3996 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 3997 net, sctp_next); 3998 break; 3999 } 4000 /* Shift forward */ 4001 netfirst = netlook; 4002 } while (netlook != NULL); 4003 } 4004 4005 /* got to have a primary set */ 4006 if (stcb->asoc.primary_destination == 0) { 4007 stcb->asoc.primary_destination = net; 4008 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4009 (net->ro.ro_rt) && 4010 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4011 /* No route to current primary adopt new primary */ 4012 stcb->asoc.primary_destination = net; 4013 } 4014 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 4015 net); 4016 /* Validate primary is first */ 4017 net = TAILQ_FIRST(&stcb->asoc.nets); 4018 if ((net != stcb->asoc.primary_destination) && 4019 (stcb->asoc.primary_destination)) { 4020 /* 4021 * first one on the list is NOT the primary sctp_cmpaddr() 4022 * is much more efficient if the primary is the first on the 4023 * list, make it so. 4024 */ 4025 TAILQ_REMOVE(&stcb->asoc.nets, 4026 stcb->asoc.primary_destination, sctp_next); 4027 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4028 stcb->asoc.primary_destination, sctp_next); 4029 } 4030 return (0); 4031 } 4032 4033 4034 static uint32_t 4035 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4036 { 4037 uint32_t id; 4038 struct sctpasochead *head; 4039 struct sctp_tcb *lstcb; 4040 4041 SCTP_INP_WLOCK(inp); 4042 try_again: 4043 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4044 /* TSNH */ 4045 SCTP_INP_WUNLOCK(inp); 4046 return (0); 4047 } 4048 /* 4049 * We don't allow assoc id to be 0, this is needed otherwise if the 4050 * id were to wrap we would have issues with some socket options. 4051 */ 4052 if (inp->sctp_associd_counter == 0) { 4053 inp->sctp_associd_counter++; 4054 } 4055 id = inp->sctp_associd_counter; 4056 inp->sctp_associd_counter++; 4057 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4058 if (lstcb) { 4059 goto try_again; 4060 } 4061 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4062 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4063 stcb->asoc.in_asocid_hash = 1; 4064 SCTP_INP_WUNLOCK(inp); 4065 return id; 4066 } 4067 4068 /* 4069 * allocate an association and add it to the endpoint. The caller must be 4070 * careful to add all additional addresses once they are know right away or 4071 * else the assoc will be may experience a blackout scenario. 4072 */ 4073 struct sctp_tcb * 4074 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4075 int *error, uint32_t override_tag, uint32_t vrf_id, 4076 struct thread *p 4077 ) 4078 { 4079 /* note the p argument is only valid in unbound sockets */ 4080 4081 struct sctp_tcb *stcb; 4082 struct sctp_association *asoc; 4083 struct sctpasochead *head; 4084 uint16_t rport; 4085 int err; 4086 4087 /* 4088 * Assumption made here: Caller has done a 4089 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4090 * address does not exist already. 4091 */ 4092 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4093 /* Hit max assoc, sorry no more */ 4094 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4095 *error = ENOBUFS; 4096 return (NULL); 4097 } 4098 if (firstaddr == NULL) { 4099 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4100 *error = EINVAL; 4101 return (NULL); 4102 } 4103 SCTP_INP_RLOCK(inp); 4104 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4105 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4106 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4107 /* 4108 * If its in the TCP pool, its NOT allowed to create an 4109 * association. The parent listener needs to call 4110 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4111 * off, or connected one does this.. its an error. 4112 */ 4113 SCTP_INP_RUNLOCK(inp); 4114 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4115 *error = EINVAL; 4116 return (NULL); 4117 } 4118 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4119 #ifdef SCTP_DEBUG 4120 if (firstaddr) { 4121 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4122 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4123 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4124 } else { 4125 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4126 } 4127 #endif /* SCTP_DEBUG */ 4128 if (firstaddr->sa_family == AF_INET) { 4129 struct sockaddr_in *sin; 4130 4131 sin = (struct sockaddr_in *)firstaddr; 4132 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 4133 /* Invalid address */ 4134 SCTP_INP_RUNLOCK(inp); 4135 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4136 *error = EINVAL; 4137 return (NULL); 4138 } 4139 rport = sin->sin_port; 4140 } else if (firstaddr->sa_family == AF_INET6) { 4141 struct sockaddr_in6 *sin6; 4142 4143 sin6 = (struct sockaddr_in6 *)firstaddr; 4144 if ((sin6->sin6_port == 0) || 4145 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 4146 /* Invalid address */ 4147 SCTP_INP_RUNLOCK(inp); 4148 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4149 *error = EINVAL; 4150 return (NULL); 4151 } 4152 rport = sin6->sin6_port; 4153 } else { 4154 /* not supported family type */ 4155 SCTP_INP_RUNLOCK(inp); 4156 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4157 *error = EINVAL; 4158 return (NULL); 4159 } 4160 SCTP_INP_RUNLOCK(inp); 4161 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4162 /* 4163 * If you have not performed a bind, then we need to do the 4164 * ephemeral bind for you. 4165 */ 4166 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4167 (struct sockaddr *)NULL, 4168 (struct sctp_ifa *)NULL, 4169 p 4170 ))) { 4171 /* bind error, probably perm */ 4172 *error = err; 4173 return (NULL); 4174 } 4175 } 4176 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4177 if (stcb == NULL) { 4178 /* out of memory? */ 4179 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4180 *error = ENOMEM; 4181 return (NULL); 4182 } 4183 SCTP_INCR_ASOC_COUNT(); 4184 4185 bzero(stcb, sizeof(*stcb)); 4186 asoc = &stcb->asoc; 4187 4188 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4189 SCTP_TCB_LOCK_INIT(stcb); 4190 SCTP_TCB_SEND_LOCK_INIT(stcb); 4191 stcb->rport = rport; 4192 /* setup back pointer's */ 4193 stcb->sctp_ep = inp; 4194 stcb->sctp_socket = inp->sctp_socket; 4195 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4196 /* failed */ 4197 SCTP_TCB_LOCK_DESTROY(stcb); 4198 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4199 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4200 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4201 SCTP_DECR_ASOC_COUNT(); 4202 *error = err; 4203 return (NULL); 4204 } 4205 /* and the port */ 4206 SCTP_INP_INFO_WLOCK(); 4207 SCTP_INP_WLOCK(inp); 4208 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4209 /* inpcb freed while alloc going on */ 4210 SCTP_TCB_LOCK_DESTROY(stcb); 4211 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4212 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4213 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4214 SCTP_INP_WUNLOCK(inp); 4215 SCTP_INP_INFO_WUNLOCK(); 4216 SCTP_DECR_ASOC_COUNT(); 4217 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4218 *error = EINVAL; 4219 return (NULL); 4220 } 4221 SCTP_TCB_LOCK(stcb); 4222 4223 /* now that my_vtag is set, add it to the hash */ 4224 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4225 /* put it in the bucket in the vtag hash of assoc's for the system */ 4226 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4227 SCTP_INP_INFO_WUNLOCK(); 4228 4229 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4230 /* failure.. memory error? */ 4231 if (asoc->strmout) { 4232 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4233 asoc->strmout = NULL; 4234 } 4235 if (asoc->mapping_array) { 4236 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4237 asoc->mapping_array = NULL; 4238 } 4239 if (asoc->nr_mapping_array) { 4240 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4241 asoc->nr_mapping_array = NULL; 4242 } 4243 SCTP_DECR_ASOC_COUNT(); 4244 SCTP_TCB_LOCK_DESTROY(stcb); 4245 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4246 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4247 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4248 SCTP_INP_WUNLOCK(inp); 4249 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4250 *error = ENOBUFS; 4251 return (NULL); 4252 } 4253 /* Init all the timers */ 4254 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 4255 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4256 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4257 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4258 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4259 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4260 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4261 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4262 4263 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4264 /* now file the port under the hash as well */ 4265 if (inp->sctp_tcbhash != NULL) { 4266 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4267 inp->sctp_hashmark)]; 4268 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4269 } 4270 SCTP_INP_WUNLOCK(inp); 4271 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4272 return (stcb); 4273 } 4274 4275 4276 void 4277 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4278 { 4279 struct sctp_association *asoc; 4280 4281 asoc = &stcb->asoc; 4282 asoc->numnets--; 4283 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4284 if (net == asoc->primary_destination) { 4285 /* Reset primary */ 4286 struct sctp_nets *lnet; 4287 4288 lnet = TAILQ_FIRST(&asoc->nets); 4289 /* 4290 * Mobility adaptation Ideally, if deleted destination is 4291 * the primary, it becomes a fast retransmission trigger by 4292 * the subsequent SET PRIMARY. (by micchie) 4293 */ 4294 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4295 SCTP_MOBILITY_BASE) || 4296 sctp_is_mobility_feature_on(stcb->sctp_ep, 4297 SCTP_MOBILITY_FASTHANDOFF)) { 4298 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4299 if (asoc->deleted_primary != NULL) { 4300 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4301 goto out; 4302 } 4303 asoc->deleted_primary = net; 4304 atomic_add_int(&net->ref_count, 1); 4305 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4306 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4307 sctp_mobility_feature_on(stcb->sctp_ep, 4308 SCTP_MOBILITY_PRIM_DELETED); 4309 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4310 stcb->sctp_ep, stcb, NULL); 4311 } 4312 out: 4313 /* Try to find a confirmed primary */ 4314 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4315 } 4316 if (net == asoc->last_data_chunk_from) { 4317 /* Reset primary */ 4318 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4319 } 4320 if (net == asoc->last_control_chunk_from) { 4321 /* Clear net */ 4322 asoc->last_control_chunk_from = NULL; 4323 } 4324 sctp_free_remote_addr(net); 4325 } 4326 4327 /* 4328 * remove a remote endpoint address from an association, it will fail if the 4329 * address does not exist. 4330 */ 4331 int 4332 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4333 { 4334 /* 4335 * Here we need to remove a remote address. This is quite simple, we 4336 * first find it in the list of address for the association 4337 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4338 * on that item. Note we do not allow it to be removed if there are 4339 * no other addresses. 4340 */ 4341 struct sctp_association *asoc; 4342 struct sctp_nets *net, *nnet; 4343 4344 asoc = &stcb->asoc; 4345 4346 /* locate the address */ 4347 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4348 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4349 continue; 4350 } 4351 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4352 remaddr)) { 4353 /* we found the guy */ 4354 if (asoc->numnets < 2) { 4355 /* Must have at LEAST two remote addresses */ 4356 return (-1); 4357 } else { 4358 sctp_remove_net(stcb, net); 4359 return (0); 4360 } 4361 } 4362 } 4363 /* not found. */ 4364 return (-2); 4365 } 4366 4367 void 4368 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4369 { 4370 struct sctpvtaghead *chain; 4371 struct sctp_tagblock *twait_block; 4372 int found = 0; 4373 int i; 4374 4375 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4376 if (!LIST_EMPTY(chain)) { 4377 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4378 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4379 if ((twait_block->vtag_block[i].v_tag == tag) && 4380 (twait_block->vtag_block[i].lport == lport) && 4381 (twait_block->vtag_block[i].rport == rport)) { 4382 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4383 twait_block->vtag_block[i].v_tag = 0; 4384 twait_block->vtag_block[i].lport = 0; 4385 twait_block->vtag_block[i].rport = 0; 4386 found = 1; 4387 break; 4388 } 4389 } 4390 if (found) 4391 break; 4392 } 4393 } 4394 } 4395 4396 int 4397 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4398 { 4399 struct sctpvtaghead *chain; 4400 struct sctp_tagblock *twait_block; 4401 int found = 0; 4402 int i; 4403 4404 SCTP_INP_INFO_WLOCK(); 4405 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4406 if (!LIST_EMPTY(chain)) { 4407 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4408 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4409 if ((twait_block->vtag_block[i].v_tag == tag) && 4410 (twait_block->vtag_block[i].lport == lport) && 4411 (twait_block->vtag_block[i].rport == rport)) { 4412 found = 1; 4413 break; 4414 } 4415 } 4416 if (found) 4417 break; 4418 } 4419 } 4420 SCTP_INP_INFO_WUNLOCK(); 4421 return (found); 4422 } 4423 4424 4425 void 4426 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4427 { 4428 struct sctpvtaghead *chain; 4429 struct sctp_tagblock *twait_block; 4430 struct timeval now; 4431 int set, i; 4432 4433 if (time == 0) { 4434 /* Its disabled */ 4435 return; 4436 } 4437 (void)SCTP_GETTIME_TIMEVAL(&now); 4438 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4439 set = 0; 4440 if (!LIST_EMPTY(chain)) { 4441 /* Block(s) present, lets find space, and expire on the fly */ 4442 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4443 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4444 if ((twait_block->vtag_block[i].v_tag == 0) && 4445 !set) { 4446 twait_block->vtag_block[i].tv_sec_at_expire = 4447 now.tv_sec + time; 4448 twait_block->vtag_block[i].v_tag = tag; 4449 twait_block->vtag_block[i].lport = lport; 4450 twait_block->vtag_block[i].rport = rport; 4451 set = 1; 4452 } else if ((twait_block->vtag_block[i].v_tag) && 4453 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4454 /* Audit expires this guy */ 4455 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4456 twait_block->vtag_block[i].v_tag = 0; 4457 twait_block->vtag_block[i].lport = 0; 4458 twait_block->vtag_block[i].rport = 0; 4459 if (set == 0) { 4460 /* Reuse it for my new tag */ 4461 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4462 twait_block->vtag_block[i].v_tag = tag; 4463 twait_block->vtag_block[i].lport = lport; 4464 twait_block->vtag_block[i].rport = rport; 4465 set = 1; 4466 } 4467 } 4468 } 4469 if (set) { 4470 /* 4471 * We only do up to the block where we can 4472 * place our tag for audits 4473 */ 4474 break; 4475 } 4476 } 4477 } 4478 /* Need to add a new block to chain */ 4479 if (!set) { 4480 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4481 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4482 if (twait_block == NULL) { 4483 #ifdef INVARIANTS 4484 panic("Can not alloc tagblock"); 4485 #endif 4486 return; 4487 } 4488 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4489 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4490 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4491 twait_block->vtag_block[0].v_tag = tag; 4492 twait_block->vtag_block[0].lport = lport; 4493 twait_block->vtag_block[0].rport = rport; 4494 } 4495 } 4496 4497 4498 4499 /*- 4500 * Free the association after un-hashing the remote port. This 4501 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4502 * expect that the input to this function IS a locked TCB. 4503 * It will return 0, if it did NOT destroy the association (instead 4504 * it unlocks it. It will return NON-zero if it either destroyed the 4505 * association OR the association is already destroyed. 4506 */ 4507 int 4508 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4509 { 4510 int i; 4511 struct sctp_association *asoc; 4512 struct sctp_nets *net, *nnet; 4513 struct sctp_laddr *laddr, *naddr; 4514 struct sctp_tmit_chunk *chk, *nchk; 4515 struct sctp_asconf_addr *aparam, *naparam; 4516 struct sctp_asconf_ack *aack, *naack; 4517 struct sctp_stream_reset_list *strrst, *nstrrst; 4518 struct sctp_queued_to_read *sq, *nsq; 4519 struct sctp_stream_queue_pending *sp, *nsp; 4520 sctp_sharedkey_t *shared_key, *nshared_key; 4521 struct socket *so; 4522 4523 /* first, lets purge the entry from the hash table. */ 4524 4525 #ifdef SCTP_LOG_CLOSING 4526 sctp_log_closing(inp, stcb, 6); 4527 #endif 4528 if (stcb->asoc.state == 0) { 4529 #ifdef SCTP_LOG_CLOSING 4530 sctp_log_closing(inp, NULL, 7); 4531 #endif 4532 /* there is no asoc, really TSNH :-0 */ 4533 return (1); 4534 } 4535 /* TEMP CODE */ 4536 if (stcb->freed_from_where == 0) { 4537 /* Only record the first place free happened from */ 4538 stcb->freed_from_where = from_location; 4539 } 4540 /* TEMP CODE */ 4541 4542 asoc = &stcb->asoc; 4543 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4544 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4545 /* nothing around */ 4546 so = NULL; 4547 else 4548 so = inp->sctp_socket; 4549 4550 /* 4551 * We used timer based freeing if a reader or writer is in the way. 4552 * So we first check if we are actually being called from a timer, 4553 * if so we abort early if a reader or writer is still in the way. 4554 */ 4555 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4556 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4557 /* 4558 * is it the timer driving us? if so are the reader/writers 4559 * gone? 4560 */ 4561 if (stcb->asoc.refcnt) { 4562 /* nope, reader or writer in the way */ 4563 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4564 /* no asoc destroyed */ 4565 SCTP_TCB_UNLOCK(stcb); 4566 #ifdef SCTP_LOG_CLOSING 4567 sctp_log_closing(inp, stcb, 8); 4568 #endif 4569 return (0); 4570 } 4571 } 4572 /* now clean up any other timers */ 4573 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4574 asoc->hb_timer.self = NULL; 4575 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4576 asoc->dack_timer.self = NULL; 4577 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4578 /*- 4579 * For stream reset we don't blast this unless 4580 * it is a str-reset timer, it might be the 4581 * free-asoc timer which we DON'T want to 4582 * disturb. 4583 */ 4584 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4585 asoc->strreset_timer.self = NULL; 4586 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4587 asoc->asconf_timer.self = NULL; 4588 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4589 asoc->autoclose_timer.self = NULL; 4590 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4591 asoc->shut_guard_timer.self = NULL; 4592 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4593 asoc->delayed_event_timer.self = NULL; 4594 /* Mobility adaptation */ 4595 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4596 asoc->delete_prim_timer.self = NULL; 4597 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4598 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4599 net->fr_timer.self = NULL; 4600 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4601 net->rxt_timer.self = NULL; 4602 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4603 net->pmtu_timer.self = NULL; 4604 } 4605 /* Now the read queue needs to be cleaned up (only once) */ 4606 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4607 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4608 SCTP_INP_READ_LOCK(inp); 4609 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4610 if (sq->stcb == stcb) { 4611 sq->do_not_ref_stcb = 1; 4612 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4613 /* 4614 * If there is no end, there never will be 4615 * now. 4616 */ 4617 if (sq->end_added == 0) { 4618 /* Held for PD-API clear that. */ 4619 sq->pdapi_aborted = 1; 4620 sq->held_length = 0; 4621 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4622 /* 4623 * Need to add a PD-API 4624 * aborted indication. 4625 * Setting the control_pdapi 4626 * assures that it will be 4627 * added right after this 4628 * msg. 4629 */ 4630 uint32_t strseq; 4631 4632 stcb->asoc.control_pdapi = sq; 4633 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4634 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4635 stcb, 4636 SCTP_PARTIAL_DELIVERY_ABORTED, 4637 (void *)&strseq, 4638 SCTP_SO_LOCKED); 4639 stcb->asoc.control_pdapi = NULL; 4640 } 4641 } 4642 /* Add an end to wake them */ 4643 sq->end_added = 1; 4644 } 4645 } 4646 SCTP_INP_READ_UNLOCK(inp); 4647 if (stcb->block_entry) { 4648 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4649 stcb->block_entry->error = ECONNRESET; 4650 stcb->block_entry = NULL; 4651 } 4652 } 4653 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4654 /* 4655 * Someone holds a reference OR the socket is unaccepted 4656 * yet. 4657 */ 4658 if ((stcb->asoc.refcnt) || 4659 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4660 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4661 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4662 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4663 } 4664 SCTP_TCB_UNLOCK(stcb); 4665 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4666 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4667 /* nothing around */ 4668 so = NULL; 4669 if (so) { 4670 /* Wake any reader/writers */ 4671 sctp_sorwakeup(inp, so); 4672 sctp_sowwakeup(inp, so); 4673 } 4674 #ifdef SCTP_LOG_CLOSING 4675 sctp_log_closing(inp, stcb, 9); 4676 #endif 4677 /* no asoc destroyed */ 4678 return (0); 4679 } 4680 #ifdef SCTP_LOG_CLOSING 4681 sctp_log_closing(inp, stcb, 10); 4682 #endif 4683 /* 4684 * When I reach here, no others want to kill the assoc yet.. and I 4685 * own the lock. Now its possible an abort comes in when I do the 4686 * lock exchange below to grab all the locks to do the final take 4687 * out. to prevent this we increment the count, which will start a 4688 * timer and blow out above thus assuring us that we hold exclusive 4689 * killing of the asoc. Note that after getting back the TCB lock we 4690 * will go ahead and increment the counter back up and stop any 4691 * timer a passing stranger may have started :-S 4692 */ 4693 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4694 atomic_add_int(&stcb->asoc.refcnt, 1); 4695 4696 SCTP_TCB_UNLOCK(stcb); 4697 SCTP_INP_INFO_WLOCK(); 4698 SCTP_INP_WLOCK(inp); 4699 SCTP_TCB_LOCK(stcb); 4700 } 4701 /* Double check the GONE flag */ 4702 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4703 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4704 /* nothing around */ 4705 so = NULL; 4706 4707 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4708 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4709 /* 4710 * For TCP type we need special handling when we are 4711 * connected. We also include the peel'ed off ones to. 4712 */ 4713 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4714 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4715 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4716 if (so) { 4717 SOCK_LOCK(so); 4718 if (so->so_rcv.sb_cc == 0) { 4719 so->so_state &= ~(SS_ISCONNECTING | 4720 SS_ISDISCONNECTING | 4721 SS_ISCONFIRMING | 4722 SS_ISCONNECTED); 4723 } 4724 socantrcvmore_locked(so); 4725 sctp_sowwakeup(inp, so); 4726 sctp_sorwakeup(inp, so); 4727 SCTP_SOWAKEUP(so); 4728 } 4729 } 4730 } 4731 /* 4732 * Make it invalid too, that way if its about to run it will abort 4733 * and return. 4734 */ 4735 /* re-increment the lock */ 4736 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4737 atomic_add_int(&stcb->asoc.refcnt, -1); 4738 } 4739 if (stcb->asoc.refcnt) { 4740 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4741 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4742 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4743 SCTP_INP_INFO_WUNLOCK(); 4744 SCTP_INP_WUNLOCK(inp); 4745 } 4746 SCTP_TCB_UNLOCK(stcb); 4747 return (0); 4748 } 4749 asoc->state = 0; 4750 if (inp->sctp_tcbhash) { 4751 LIST_REMOVE(stcb, sctp_tcbhash); 4752 } 4753 if (stcb->asoc.in_asocid_hash) { 4754 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4755 } 4756 /* Now lets remove it from the list of ALL associations in the EP */ 4757 LIST_REMOVE(stcb, sctp_tcblist); 4758 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4759 SCTP_INP_INCR_REF(inp); 4760 SCTP_INP_WUNLOCK(inp); 4761 } 4762 /* pull from vtag hash */ 4763 LIST_REMOVE(stcb, sctp_asocs); 4764 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4765 inp->sctp_lport, stcb->rport); 4766 4767 /* 4768 * Now restop the timers to be sure this is paranoia at is finest! 4769 */ 4770 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4771 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4772 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4773 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4774 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4775 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4776 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4777 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4778 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4779 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4780 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4781 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4782 } 4783 4784 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4785 /* 4786 * The chunk lists and such SHOULD be empty but we check them just 4787 * in case. 4788 */ 4789 /* anything on the wheel needs to be removed */ 4790 for (i = 0; i < asoc->streamoutcnt; i++) { 4791 struct sctp_stream_out *outs; 4792 4793 outs = &asoc->strmout[i]; 4794 /* now clean up any chunks here */ 4795 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4796 TAILQ_REMOVE(&outs->outqueue, sp, next); 4797 if (sp->data) { 4798 if (so) { 4799 /* Still an open socket - report */ 4800 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4801 SCTP_NOTIFY_DATAGRAM_UNSENT, 4802 (void *)sp, SCTP_SO_LOCKED); 4803 } 4804 if (sp->data) { 4805 sctp_m_freem(sp->data); 4806 sp->data = NULL; 4807 sp->tail_mbuf = NULL; 4808 } 4809 } 4810 if (sp->net) { 4811 sctp_free_remote_addr(sp->net); 4812 sp->net = NULL; 4813 } 4814 sctp_free_spbufspace(stcb, asoc, sp); 4815 if (sp->holds_key_ref) 4816 sctp_auth_key_release(stcb, sp->auth_keyid); 4817 /* Free the zone stuff */ 4818 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 4819 SCTP_DECR_STRMOQ_COUNT(); 4820 /* sa_ignore FREED_MEMORY */ 4821 } 4822 } 4823 /* sa_ignore FREED_MEMORY */ 4824 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4825 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4826 SCTP_FREE(strrst, SCTP_M_STRESET); 4827 } 4828 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4829 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4830 if (sq->data) { 4831 sctp_m_freem(sq->data); 4832 sq->data = NULL; 4833 } 4834 sctp_free_remote_addr(sq->whoFrom); 4835 sq->whoFrom = NULL; 4836 sq->stcb = NULL; 4837 /* Free the ctl entry */ 4838 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4839 SCTP_DECR_READQ_COUNT(); 4840 /* sa_ignore FREED_MEMORY */ 4841 } 4842 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4843 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4844 if (chk->data) { 4845 sctp_m_freem(chk->data); 4846 chk->data = NULL; 4847 } 4848 if (chk->holds_key_ref) 4849 sctp_auth_key_release(stcb, chk->auth_keyid); 4850 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4851 SCTP_DECR_CHK_COUNT(); 4852 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4853 asoc->free_chunk_cnt--; 4854 /* sa_ignore FREED_MEMORY */ 4855 } 4856 /* pending send queue SHOULD be empty */ 4857 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4858 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4859 if (chk->data) { 4860 if (so) { 4861 /* Still a socket? */ 4862 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 4863 SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED); 4864 } 4865 if (chk->data) { 4866 sctp_m_freem(chk->data); 4867 chk->data = NULL; 4868 } 4869 } 4870 if (chk->holds_key_ref) 4871 sctp_auth_key_release(stcb, chk->auth_keyid); 4872 if (chk->whoTo) { 4873 sctp_free_remote_addr(chk->whoTo); 4874 chk->whoTo = NULL; 4875 } 4876 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4877 SCTP_DECR_CHK_COUNT(); 4878 /* sa_ignore FREED_MEMORY */ 4879 } 4880 /* sent queue SHOULD be empty */ 4881 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4882 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4883 if (chk->data) { 4884 if (so) { 4885 /* Still a socket? */ 4886 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 4887 SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED); 4888 } 4889 if (chk->data) { 4890 sctp_m_freem(chk->data); 4891 chk->data = NULL; 4892 } 4893 } 4894 if (chk->holds_key_ref) 4895 sctp_auth_key_release(stcb, chk->auth_keyid); 4896 sctp_free_remote_addr(chk->whoTo); 4897 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4898 SCTP_DECR_CHK_COUNT(); 4899 /* sa_ignore FREED_MEMORY */ 4900 } 4901 /* control queue MAY not be empty */ 4902 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 4903 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4904 if (chk->data) { 4905 sctp_m_freem(chk->data); 4906 chk->data = NULL; 4907 } 4908 if (chk->holds_key_ref) 4909 sctp_auth_key_release(stcb, chk->auth_keyid); 4910 sctp_free_remote_addr(chk->whoTo); 4911 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4912 SCTP_DECR_CHK_COUNT(); 4913 /* sa_ignore FREED_MEMORY */ 4914 } 4915 /* ASCONF queue MAY not be empty */ 4916 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 4917 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4918 if (chk->data) { 4919 sctp_m_freem(chk->data); 4920 chk->data = NULL; 4921 } 4922 if (chk->holds_key_ref) 4923 sctp_auth_key_release(stcb, chk->auth_keyid); 4924 sctp_free_remote_addr(chk->whoTo); 4925 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4926 SCTP_DECR_CHK_COUNT(); 4927 /* sa_ignore FREED_MEMORY */ 4928 } 4929 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 4930 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4931 if (chk->data) { 4932 sctp_m_freem(chk->data); 4933 chk->data = NULL; 4934 } 4935 if (chk->holds_key_ref) 4936 sctp_auth_key_release(stcb, chk->auth_keyid); 4937 sctp_free_remote_addr(chk->whoTo); 4938 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4939 SCTP_DECR_CHK_COUNT(); 4940 /* sa_ignore FREED_MEMORY */ 4941 } 4942 4943 if (asoc->mapping_array) { 4944 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4945 asoc->mapping_array = NULL; 4946 } 4947 if (asoc->nr_mapping_array) { 4948 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4949 asoc->nr_mapping_array = NULL; 4950 } 4951 /* the stream outs */ 4952 if (asoc->strmout) { 4953 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4954 asoc->strmout = NULL; 4955 } 4956 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 4957 if (asoc->strmin) { 4958 struct sctp_queued_to_read *ctl, *nctl; 4959 4960 for (i = 0; i < asoc->streamincnt; i++) { 4961 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 4962 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 4963 sctp_free_remote_addr(ctl->whoFrom); 4964 if (ctl->data) { 4965 sctp_m_freem(ctl->data); 4966 ctl->data = NULL; 4967 } 4968 /* 4969 * We don't free the address here since all 4970 * the net's were freed above. 4971 */ 4972 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 4973 SCTP_DECR_READQ_COUNT(); 4974 } 4975 } 4976 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4977 asoc->strmin = NULL; 4978 } 4979 asoc->streamincnt = 0; 4980 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4981 #ifdef INVARIANTS 4982 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 4983 panic("no net's left alloc'ed, or list points to itself"); 4984 } 4985 #endif 4986 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4987 sctp_free_remote_addr(net); 4988 } 4989 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 4990 /* sa_ignore FREED_MEMORY */ 4991 sctp_remove_laddr(laddr); 4992 } 4993 4994 /* pending asconf (address) parameters */ 4995 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 4996 /* sa_ignore FREED_MEMORY */ 4997 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 4998 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 4999 } 5000 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5001 /* sa_ignore FREED_MEMORY */ 5002 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5003 if (aack->data != NULL) { 5004 sctp_m_freem(aack->data); 5005 } 5006 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5007 } 5008 /* clean up auth stuff */ 5009 if (asoc->local_hmacs) 5010 sctp_free_hmaclist(asoc->local_hmacs); 5011 if (asoc->peer_hmacs) 5012 sctp_free_hmaclist(asoc->peer_hmacs); 5013 5014 if (asoc->local_auth_chunks) 5015 sctp_free_chunklist(asoc->local_auth_chunks); 5016 if (asoc->peer_auth_chunks) 5017 sctp_free_chunklist(asoc->peer_auth_chunks); 5018 5019 sctp_free_authinfo(&asoc->authinfo); 5020 5021 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5022 LIST_REMOVE(shared_key, next); 5023 sctp_free_sharedkey(shared_key); 5024 /* sa_ignore FREED_MEMORY */ 5025 } 5026 5027 /* Insert new items here :> */ 5028 5029 /* Get rid of LOCK */ 5030 SCTP_TCB_LOCK_DESTROY(stcb); 5031 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5032 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5033 SCTP_INP_INFO_WUNLOCK(); 5034 SCTP_INP_RLOCK(inp); 5035 } 5036 #ifdef SCTP_TRACK_FREED_ASOCS 5037 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5038 /* now clean up the tasoc itself */ 5039 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5040 SCTP_DECR_ASOC_COUNT(); 5041 } else { 5042 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5043 } 5044 #else 5045 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5046 SCTP_DECR_ASOC_COUNT(); 5047 #endif 5048 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5049 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5050 /* 5051 * If its NOT the inp_free calling us AND sctp_close 5052 * as been called, we call back... 5053 */ 5054 SCTP_INP_RUNLOCK(inp); 5055 /* 5056 * This will start the kill timer (if we are the 5057 * last one) since we hold an increment yet. But 5058 * this is the only safe way to do this since 5059 * otherwise if the socket closes at the same time 5060 * we are here we might collide in the cleanup. 5061 */ 5062 sctp_inpcb_free(inp, 5063 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5064 SCTP_CALLED_DIRECTLY_NOCMPSET); 5065 SCTP_INP_DECR_REF(inp); 5066 goto out_of; 5067 } else { 5068 /* The socket is still open. */ 5069 SCTP_INP_DECR_REF(inp); 5070 } 5071 } 5072 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5073 SCTP_INP_RUNLOCK(inp); 5074 } 5075 out_of: 5076 /* destroyed the asoc */ 5077 #ifdef SCTP_LOG_CLOSING 5078 sctp_log_closing(inp, NULL, 11); 5079 #endif 5080 return (1); 5081 } 5082 5083 5084 5085 /* 5086 * determine if a destination is "reachable" based upon the addresses bound 5087 * to the current endpoint (e.g. only v4 or v6 currently bound) 5088 */ 5089 /* 5090 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5091 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5092 * types bound as its endpoint 5093 */ 5094 int 5095 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5096 { 5097 struct sctp_inpcb *inp; 5098 int answer; 5099 5100 /* 5101 * No locks here, the TCB, in all cases is already locked and an 5102 * assoc is up. There is either a INP lock by the caller applied (in 5103 * asconf case when deleting an address) or NOT in the HB case, 5104 * however if HB then the INP increment is up and the INP will not 5105 * be removed (on top of the fact that we have a TCB lock). So we 5106 * only want to read the sctp_flags, which is either bound-all or 5107 * not.. no protection needed since once an assoc is up you can't be 5108 * changing your binding. 5109 */ 5110 inp = stcb->sctp_ep; 5111 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5112 /* if bound all, destination is not restricted */ 5113 /* 5114 * RRS: Question during lock work: Is this correct? If you 5115 * are bound-all you still might need to obey the V4--V6 5116 * flags??? IMO this bound-all stuff needs to be removed! 5117 */ 5118 return (1); 5119 } 5120 /* NOTE: all "scope" checks are done when local addresses are added */ 5121 if (destaddr->sa_family == AF_INET6) { 5122 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5123 } else if (destaddr->sa_family == AF_INET) { 5124 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5125 } else { 5126 /* invalid family, so it's unreachable */ 5127 answer = 0; 5128 } 5129 return (answer); 5130 } 5131 5132 /* 5133 * update the inp_vflags on an endpoint 5134 */ 5135 static void 5136 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5137 { 5138 struct sctp_laddr *laddr; 5139 5140 /* first clear the flag */ 5141 inp->ip_inp.inp.inp_vflag = 0; 5142 /* set the flag based on addresses on the ep list */ 5143 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5144 if (laddr->ifa == NULL) { 5145 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5146 __FUNCTION__); 5147 continue; 5148 } 5149 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5150 continue; 5151 } 5152 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 5153 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5154 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 5155 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5156 } 5157 } 5158 } 5159 5160 /* 5161 * Add the address to the endpoint local address list There is nothing to be 5162 * done if we are bound to all addresses 5163 */ 5164 void 5165 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5166 { 5167 struct sctp_laddr *laddr; 5168 int fnd, error = 0; 5169 5170 fnd = 0; 5171 5172 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5173 /* You are already bound to all. You have it already */ 5174 return; 5175 } 5176 if (ifa->address.sa.sa_family == AF_INET6) { 5177 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5178 /* Can't bind a non-useable addr. */ 5179 return; 5180 } 5181 } 5182 /* first, is it already present? */ 5183 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5184 if (laddr->ifa == ifa) { 5185 fnd = 1; 5186 break; 5187 } 5188 } 5189 5190 if (fnd == 0) { 5191 /* Not in the ep list */ 5192 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5193 if (error != 0) 5194 return; 5195 inp->laddr_count++; 5196 /* update inp_vflag flags */ 5197 if (ifa->address.sa.sa_family == AF_INET6) { 5198 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5199 } else if (ifa->address.sa.sa_family == AF_INET) { 5200 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5201 } 5202 } 5203 return; 5204 } 5205 5206 5207 /* 5208 * select a new (hopefully reachable) destination net (should only be used 5209 * when we deleted an ep addr that is the only usable source address to reach 5210 * the destination net) 5211 */ 5212 static void 5213 sctp_select_primary_destination(struct sctp_tcb *stcb) 5214 { 5215 struct sctp_nets *net; 5216 5217 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5218 /* for now, we'll just pick the first reachable one we find */ 5219 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5220 continue; 5221 if (sctp_destination_is_reachable(stcb, 5222 (struct sockaddr *)&net->ro._l_addr)) { 5223 /* found a reachable destination */ 5224 stcb->asoc.primary_destination = net; 5225 } 5226 } 5227 /* I can't there from here! ...we're gonna die shortly... */ 5228 } 5229 5230 5231 /* 5232 * Delete the address from the endpoint local address list There is nothing 5233 * to be done if we are bound to all addresses 5234 */ 5235 void 5236 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5237 { 5238 struct sctp_laddr *laddr; 5239 int fnd; 5240 5241 fnd = 0; 5242 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5243 /* You are already bound to all. You have it already */ 5244 return; 5245 } 5246 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5247 if (laddr->ifa == ifa) { 5248 fnd = 1; 5249 break; 5250 } 5251 } 5252 if (fnd && (inp->laddr_count < 2)) { 5253 /* can't delete unless there are at LEAST 2 addresses */ 5254 return; 5255 } 5256 if (fnd) { 5257 /* 5258 * clean up any use of this address go through our 5259 * associations and clear any last_used_address that match 5260 * this one for each assoc, see if a new primary_destination 5261 * is needed 5262 */ 5263 struct sctp_tcb *stcb; 5264 5265 /* clean up "next_addr_touse" */ 5266 if (inp->next_addr_touse == laddr) 5267 /* delete this address */ 5268 inp->next_addr_touse = NULL; 5269 5270 /* clean up "last_used_address" */ 5271 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5272 struct sctp_nets *net; 5273 5274 SCTP_TCB_LOCK(stcb); 5275 if (stcb->asoc.last_used_address == laddr) 5276 /* delete this address */ 5277 stcb->asoc.last_used_address = NULL; 5278 /* 5279 * Now spin through all the nets and purge any ref 5280 * to laddr 5281 */ 5282 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5283 if (net->ro._s_addr && 5284 (net->ro._s_addr->ifa == laddr->ifa)) { 5285 /* Yep, purge src address selected */ 5286 sctp_rtentry_t *rt; 5287 5288 /* delete this address if cached */ 5289 rt = net->ro.ro_rt; 5290 if (rt != NULL) { 5291 RTFREE(rt); 5292 net->ro.ro_rt = NULL; 5293 } 5294 sctp_free_ifa(net->ro._s_addr); 5295 net->ro._s_addr = NULL; 5296 net->src_addr_selected = 0; 5297 } 5298 } 5299 SCTP_TCB_UNLOCK(stcb); 5300 } /* for each tcb */ 5301 /* remove it from the ep list */ 5302 sctp_remove_laddr(laddr); 5303 inp->laddr_count--; 5304 /* update inp_vflag flags */ 5305 sctp_update_ep_vflag(inp); 5306 } 5307 return; 5308 } 5309 5310 /* 5311 * Add the address to the TCB local address restricted list. 5312 * This is a "pending" address list (eg. addresses waiting for an 5313 * ASCONF-ACK response) and cannot be used as a valid source address. 5314 */ 5315 void 5316 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5317 { 5318 struct sctp_inpcb *inp; 5319 struct sctp_laddr *laddr; 5320 struct sctpladdr *list; 5321 5322 /* 5323 * Assumes TCB is locked.. and possibly the INP. May need to 5324 * confirm/fix that if we need it and is not the case. 5325 */ 5326 list = &stcb->asoc.sctp_restricted_addrs; 5327 5328 inp = stcb->sctp_ep; 5329 if (ifa->address.sa.sa_family == AF_INET6) { 5330 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5331 /* Can't bind a non-existent addr. */ 5332 return; 5333 } 5334 } 5335 /* does the address already exist? */ 5336 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5337 if (laddr->ifa == ifa) { 5338 return; 5339 } 5340 } 5341 5342 /* add to the list */ 5343 (void)sctp_insert_laddr(list, ifa, 0); 5344 return; 5345 } 5346 5347 /* 5348 * insert an laddr entry with the given ifa for the desired list 5349 */ 5350 int 5351 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5352 { 5353 struct sctp_laddr *laddr; 5354 5355 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5356 if (laddr == NULL) { 5357 /* out of memory? */ 5358 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5359 return (EINVAL); 5360 } 5361 SCTP_INCR_LADDR_COUNT(); 5362 bzero(laddr, sizeof(*laddr)); 5363 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5364 laddr->ifa = ifa; 5365 laddr->action = act; 5366 atomic_add_int(&ifa->refcount, 1); 5367 /* insert it */ 5368 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5369 5370 return (0); 5371 } 5372 5373 /* 5374 * Remove an laddr entry from the local address list (on an assoc) 5375 */ 5376 void 5377 sctp_remove_laddr(struct sctp_laddr *laddr) 5378 { 5379 5380 /* remove from the list */ 5381 LIST_REMOVE(laddr, sctp_nxt_addr); 5382 sctp_free_ifa(laddr->ifa); 5383 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5384 SCTP_DECR_LADDR_COUNT(); 5385 } 5386 5387 /* 5388 * Remove a local address from the TCB local address restricted list 5389 */ 5390 void 5391 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5392 { 5393 struct sctp_inpcb *inp; 5394 struct sctp_laddr *laddr; 5395 5396 /* 5397 * This is called by asconf work. It is assumed that a) The TCB is 5398 * locked and b) The INP is locked. This is true in as much as I can 5399 * trace through the entry asconf code where I did these locks. 5400 * Again, the ASCONF code is a bit different in that it does lock 5401 * the INP during its work often times. This must be since we don't 5402 * want other proc's looking up things while what they are looking 5403 * up is changing :-D 5404 */ 5405 5406 inp = stcb->sctp_ep; 5407 /* if subset bound and don't allow ASCONF's, can't delete last */ 5408 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5409 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5410 if (stcb->sctp_ep->laddr_count < 2) { 5411 /* can't delete last address */ 5412 return; 5413 } 5414 } 5415 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5416 /* remove the address if it exists */ 5417 if (laddr->ifa == NULL) 5418 continue; 5419 if (laddr->ifa == ifa) { 5420 sctp_remove_laddr(laddr); 5421 return; 5422 } 5423 } 5424 5425 /* address not found! */ 5426 return; 5427 } 5428 5429 /* 5430 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5431 */ 5432 /* sysctl */ 5433 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5434 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5435 5436 void 5437 sctp_pcb_init() 5438 { 5439 /* 5440 * SCTP initialization for the PCB structures should be called by 5441 * the sctp_init() funciton. 5442 */ 5443 int i; 5444 struct timeval tv; 5445 5446 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5447 /* error I was called twice */ 5448 return; 5449 } 5450 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5451 5452 #if defined(SCTP_LOCAL_TRACE_BUF) 5453 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5454 #endif 5455 (void)SCTP_GETTIME_TIMEVAL(&tv); 5456 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5457 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5458 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5459 #else 5460 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5461 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5462 #endif 5463 /* init the empty list of (All) Endpoints */ 5464 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5465 5466 5467 /* init the hash table of endpoints */ 5468 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5469 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5470 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5471 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5472 &SCTP_BASE_INFO(hashasocmark)); 5473 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5474 &SCTP_BASE_INFO(hashmark)); 5475 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5476 &SCTP_BASE_INFO(hashtcpmark)); 5477 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5478 5479 5480 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5481 &SCTP_BASE_INFO(hashvrfmark)); 5482 5483 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5484 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5485 /* init the zones */ 5486 /* 5487 * FIX ME: Should check for NULL returns, but if it does fail we are 5488 * doomed to panic anyways... add later maybe. 5489 */ 5490 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5491 sizeof(struct sctp_inpcb), maxsockets); 5492 5493 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5494 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5495 5496 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5497 sizeof(struct sctp_laddr), 5498 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5499 5500 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5501 sizeof(struct sctp_nets), 5502 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5503 5504 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5505 sizeof(struct sctp_tmit_chunk), 5506 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5507 5508 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5509 sizeof(struct sctp_queued_to_read), 5510 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5511 5512 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5513 sizeof(struct sctp_stream_queue_pending), 5514 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5515 5516 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5517 sizeof(struct sctp_asconf), 5518 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5519 5520 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5521 sizeof(struct sctp_asconf_ack), 5522 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5523 5524 5525 /* Master Lock INIT for info structure */ 5526 SCTP_INP_INFO_LOCK_INIT(); 5527 SCTP_STATLOG_INIT_LOCK(); 5528 5529 SCTP_IPI_COUNT_INIT(); 5530 SCTP_IPI_ADDR_INIT(); 5531 #ifdef SCTP_PACKET_LOGGING 5532 SCTP_IP_PKTLOG_INIT(); 5533 #endif 5534 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5535 5536 SCTP_WQ_ADDR_INIT(); 5537 /* not sure if we need all the counts */ 5538 SCTP_BASE_INFO(ipi_count_ep) = 0; 5539 /* assoc/tcb zone info */ 5540 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5541 /* local addrlist zone info */ 5542 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5543 /* remote addrlist zone info */ 5544 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5545 /* chunk info */ 5546 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5547 5548 /* socket queue zone info */ 5549 SCTP_BASE_INFO(ipi_count_readq) = 0; 5550 5551 /* stream out queue cont */ 5552 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5553 5554 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5555 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5556 5557 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5558 5559 /* Init the TIMEWAIT list */ 5560 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5561 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5562 } 5563 5564 sctp_startup_iterator(); 5565 5566 /* 5567 * INIT the default VRF which for BSD is the only one, other O/S's 5568 * may have more. But initially they must start with one and then 5569 * add the VRF's as addresses are added. 5570 */ 5571 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5572 5573 } 5574 5575 /* 5576 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5577 */ 5578 void 5579 sctp_pcb_finish(void) 5580 { 5581 struct sctp_vrflist *vrf_bucket; 5582 struct sctp_vrf *vrf, *nvrf; 5583 struct sctp_ifn *ifn, *nifn; 5584 struct sctp_ifa *ifa, *nifa; 5585 struct sctpvtaghead *chain; 5586 struct sctp_tagblock *twait_block, *prev_twait_block; 5587 struct sctp_laddr *wi, *nwi; 5588 int i; 5589 5590 /* 5591 * Free BSD the it thread never exits but we do clean up. The only 5592 * way freebsd reaches here if we have VRF's but we still add the 5593 * ifdef to make it compile on old versions. 5594 */ 5595 { 5596 struct sctp_iterator *it, *nit; 5597 5598 SCTP_IPI_ITERATOR_WQ_LOCK(); 5599 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5600 if (it->vn != curvnet) { 5601 continue; 5602 } 5603 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5604 if (it->function_atend != NULL) { 5605 (*it->function_atend) (it->pointer, it->val); 5606 } 5607 SCTP_FREE(it, SCTP_M_ITER); 5608 } 5609 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5610 SCTP_ITERATOR_LOCK(); 5611 if ((sctp_it_ctl.cur_it) && 5612 (sctp_it_ctl.cur_it->vn == curvnet)) { 5613 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5614 } 5615 SCTP_ITERATOR_UNLOCK(); 5616 } 5617 5618 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5619 SCTP_WQ_ADDR_LOCK(); 5620 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5621 LIST_REMOVE(wi, sctp_nxt_addr); 5622 SCTP_DECR_LADDR_COUNT(); 5623 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5624 } 5625 SCTP_WQ_ADDR_UNLOCK(); 5626 5627 /* 5628 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5629 * destroyed first). 5630 */ 5631 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5632 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5633 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5634 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5635 /* free the ifa */ 5636 LIST_REMOVE(ifa, next_bucket); 5637 LIST_REMOVE(ifa, next_ifa); 5638 SCTP_FREE(ifa, SCTP_M_IFA); 5639 } 5640 /* free the ifn */ 5641 LIST_REMOVE(ifn, next_bucket); 5642 LIST_REMOVE(ifn, next_ifn); 5643 SCTP_FREE(ifn, SCTP_M_IFN); 5644 } 5645 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5646 /* free the vrf */ 5647 LIST_REMOVE(vrf, next_vrf); 5648 SCTP_FREE(vrf, SCTP_M_VRF); 5649 } 5650 /* free the vrf hashes */ 5651 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5652 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5653 5654 /* 5655 * free the TIMEWAIT list elements malloc'd in the function 5656 * sctp_add_vtag_to_timewait()... 5657 */ 5658 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5659 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5660 if (!LIST_EMPTY(chain)) { 5661 prev_twait_block = NULL; 5662 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5663 if (prev_twait_block) { 5664 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5665 } 5666 prev_twait_block = twait_block; 5667 } 5668 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5669 } 5670 } 5671 5672 /* free the locks and mutexes */ 5673 #ifdef SCTP_PACKET_LOGGING 5674 SCTP_IP_PKTLOG_DESTROY(); 5675 #endif 5676 SCTP_IPI_ADDR_DESTROY(); 5677 SCTP_STATLOG_DESTROY(); 5678 SCTP_INP_INFO_LOCK_DESTROY(); 5679 5680 SCTP_WQ_ADDR_DESTROY(); 5681 5682 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5683 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5684 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5685 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5686 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5687 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5688 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5689 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5690 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5691 /* Get rid of other stuff to */ 5692 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5693 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5694 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5695 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5696 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5697 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5698 5699 } 5700 5701 5702 int 5703 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5704 int iphlen, int offset, int limit, struct sctphdr *sh, 5705 struct sockaddr *altsa) 5706 { 5707 /* 5708 * grub through the INIT pulling addresses and loading them to the 5709 * nets structure in the asoc. The from address in the mbuf should 5710 * also be loaded (if it is not already). This routine can be called 5711 * with either INIT or INIT-ACK's as long as the m points to the IP 5712 * packet and the offset points to the beginning of the parameters. 5713 */ 5714 struct sctp_inpcb *inp, *l_inp; 5715 struct sctp_nets *net, *nnet, *net_tmp; 5716 struct ip *iph; 5717 struct sctp_paramhdr *phdr, parm_buf; 5718 struct sctp_tcb *stcb_tmp; 5719 uint16_t ptype, plen; 5720 struct sockaddr *sa; 5721 struct sockaddr_storage dest_store; 5722 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 5723 struct sockaddr_in sin; 5724 struct sockaddr_in6 sin6; 5725 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5726 struct sctp_auth_random *p_random = NULL; 5727 uint16_t random_len = 0; 5728 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5729 struct sctp_auth_hmac_algo *hmacs = NULL; 5730 uint16_t hmacs_len = 0; 5731 uint8_t saw_asconf = 0; 5732 uint8_t saw_asconf_ack = 0; 5733 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 5734 struct sctp_auth_chunk_list *chunks = NULL; 5735 uint16_t num_chunks = 0; 5736 sctp_key_t *new_key; 5737 uint32_t keylen; 5738 int got_random = 0, got_hmacs = 0, got_chklist = 0; 5739 5740 /* First get the destination address setup too. */ 5741 memset(&sin, 0, sizeof(sin)); 5742 memset(&sin6, 0, sizeof(sin6)); 5743 5744 sin.sin_family = AF_INET; 5745 sin.sin_len = sizeof(sin); 5746 sin.sin_port = stcb->rport; 5747 5748 sin6.sin6_family = AF_INET6; 5749 sin6.sin6_len = sizeof(struct sockaddr_in6); 5750 sin6.sin6_port = stcb->rport; 5751 if (altsa == NULL) { 5752 iph = mtod(m, struct ip *); 5753 switch (iph->ip_v) { 5754 case IPVERSION: 5755 { 5756 /* its IPv4 */ 5757 struct sockaddr_in *sin_2; 5758 5759 sin_2 = (struct sockaddr_in *)(local_sa); 5760 memset(sin_2, 0, sizeof(sin)); 5761 sin_2->sin_family = AF_INET; 5762 sin_2->sin_len = sizeof(sin); 5763 sin_2->sin_port = sh->dest_port; 5764 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 5765 sin.sin_addr = iph->ip_src; 5766 sa = (struct sockaddr *)&sin; 5767 break; 5768 } 5769 #ifdef INET6 5770 case IPV6_VERSION >> 4: 5771 { 5772 /* its IPv6 */ 5773 struct ip6_hdr *ip6; 5774 struct sockaddr_in6 *sin6_2; 5775 5776 ip6 = mtod(m, struct ip6_hdr *); 5777 sin6_2 = (struct sockaddr_in6 *)(local_sa); 5778 memset(sin6_2, 0, sizeof(sin6)); 5779 sin6_2->sin6_family = AF_INET6; 5780 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 5781 sin6_2->sin6_port = sh->dest_port; 5782 sin6.sin6_addr = ip6->ip6_src; 5783 sa = (struct sockaddr *)&sin6; 5784 break; 5785 } 5786 #endif 5787 default: 5788 return (-1); 5789 break; 5790 } 5791 } else { 5792 /* 5793 * For cookies we use the src address NOT from the packet 5794 * but from the original INIT 5795 */ 5796 sa = altsa; 5797 } 5798 /* Turn off ECN until we get through all params */ 5799 stcb->asoc.ecn_allowed = 0; 5800 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5801 /* mark all addresses that we have currently on the list */ 5802 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 5803 } 5804 /* does the source address already exist? if so skip it */ 5805 l_inp = inp = stcb->sctp_ep; 5806 5807 atomic_add_int(&stcb->asoc.refcnt, 1); 5808 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 5809 atomic_add_int(&stcb->asoc.refcnt, -1); 5810 5811 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 5812 /* we must add the source address */ 5813 /* no scope set here since we have a tcb already. */ 5814 if ((sa->sa_family == AF_INET) && 5815 (stcb->asoc.ipv4_addr_legal)) { 5816 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 5817 return (-1); 5818 } 5819 } else if ((sa->sa_family == AF_INET6) && 5820 (stcb->asoc.ipv6_addr_legal)) { 5821 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 5822 return (-2); 5823 } 5824 } 5825 } else { 5826 if (net_tmp != NULL && stcb_tmp == stcb) { 5827 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 5828 } else if (stcb_tmp != stcb) { 5829 /* It belongs to another association? */ 5830 if (stcb_tmp) 5831 SCTP_TCB_UNLOCK(stcb_tmp); 5832 return (-3); 5833 } 5834 } 5835 if (stcb->asoc.state == 0) { 5836 /* the assoc was freed? */ 5837 return (-4); 5838 } 5839 /* 5840 * peer must explicitly turn this on. This may have been initialized 5841 * to be "on" in order to allow local addr changes while INIT's are 5842 * in flight. 5843 */ 5844 stcb->asoc.peer_supports_asconf = 0; 5845 /* now we must go through each of the params. */ 5846 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 5847 while (phdr) { 5848 ptype = ntohs(phdr->param_type); 5849 plen = ntohs(phdr->param_length); 5850 /* 5851 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 5852 * (int)plen); 5853 */ 5854 if (offset + plen > limit) { 5855 break; 5856 } 5857 if (plen == 0) { 5858 break; 5859 } 5860 if (ptype == SCTP_IPV4_ADDRESS) { 5861 if (stcb->asoc.ipv4_addr_legal) { 5862 struct sctp_ipv4addr_param *p4, p4_buf; 5863 5864 /* ok get the v4 address and check/add */ 5865 phdr = sctp_get_next_param(m, offset, 5866 (struct sctp_paramhdr *)&p4_buf, 5867 sizeof(p4_buf)); 5868 if (plen != sizeof(struct sctp_ipv4addr_param) || 5869 phdr == NULL) { 5870 return (-5); 5871 } 5872 p4 = (struct sctp_ipv4addr_param *)phdr; 5873 sin.sin_addr.s_addr = p4->addr; 5874 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 5875 /* Skip multi-cast addresses */ 5876 goto next_param; 5877 } 5878 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 5879 (sin.sin_addr.s_addr == INADDR_ANY)) { 5880 goto next_param; 5881 } 5882 sa = (struct sockaddr *)&sin; 5883 inp = stcb->sctp_ep; 5884 atomic_add_int(&stcb->asoc.refcnt, 1); 5885 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5886 local_sa, stcb); 5887 atomic_add_int(&stcb->asoc.refcnt, -1); 5888 5889 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 5890 inp == NULL) { 5891 /* we must add the source address */ 5892 /* 5893 * no scope set since we have a tcb 5894 * already 5895 */ 5896 5897 /* 5898 * we must validate the state again 5899 * here 5900 */ 5901 add_it_now: 5902 if (stcb->asoc.state == 0) { 5903 /* the assoc was freed? */ 5904 return (-7); 5905 } 5906 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 5907 return (-8); 5908 } 5909 } else if (stcb_tmp == stcb) { 5910 if (stcb->asoc.state == 0) { 5911 /* the assoc was freed? */ 5912 return (-10); 5913 } 5914 if (net != NULL) { 5915 /* clear flag */ 5916 net->dest_state &= 5917 ~SCTP_ADDR_NOT_IN_ASSOC; 5918 } 5919 } else { 5920 /* 5921 * strange, address is in another 5922 * assoc? straighten out locks. 5923 */ 5924 if (stcb_tmp) { 5925 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 5926 /* 5927 * in setup state we 5928 * abort this guy 5929 */ 5930 sctp_abort_an_association(stcb_tmp->sctp_ep, 5931 stcb_tmp, 1, NULL, 0); 5932 goto add_it_now; 5933 } 5934 SCTP_TCB_UNLOCK(stcb_tmp); 5935 } 5936 if (stcb->asoc.state == 0) { 5937 /* the assoc was freed? */ 5938 return (-12); 5939 } 5940 return (-13); 5941 } 5942 } 5943 } else if (ptype == SCTP_IPV6_ADDRESS) { 5944 if (stcb->asoc.ipv6_addr_legal) { 5945 /* ok get the v6 address and check/add */ 5946 struct sctp_ipv6addr_param *p6, p6_buf; 5947 5948 phdr = sctp_get_next_param(m, offset, 5949 (struct sctp_paramhdr *)&p6_buf, 5950 sizeof(p6_buf)); 5951 if (plen != sizeof(struct sctp_ipv6addr_param) || 5952 phdr == NULL) { 5953 return (-14); 5954 } 5955 p6 = (struct sctp_ipv6addr_param *)phdr; 5956 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 5957 sizeof(p6->addr)); 5958 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 5959 /* Skip multi-cast addresses */ 5960 goto next_param; 5961 } 5962 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 5963 /* 5964 * Link local make no sense without 5965 * scope 5966 */ 5967 goto next_param; 5968 } 5969 sa = (struct sockaddr *)&sin6; 5970 inp = stcb->sctp_ep; 5971 atomic_add_int(&stcb->asoc.refcnt, 1); 5972 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5973 local_sa, stcb); 5974 atomic_add_int(&stcb->asoc.refcnt, -1); 5975 if (stcb_tmp == NULL && 5976 (inp == stcb->sctp_ep || inp == NULL)) { 5977 /* 5978 * we must validate the state again 5979 * here 5980 */ 5981 add_it_now6: 5982 if (stcb->asoc.state == 0) { 5983 /* the assoc was freed? */ 5984 return (-16); 5985 } 5986 /* 5987 * we must add the address, no scope 5988 * set 5989 */ 5990 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 5991 return (-17); 5992 } 5993 } else if (stcb_tmp == stcb) { 5994 /* 5995 * we must validate the state again 5996 * here 5997 */ 5998 if (stcb->asoc.state == 0) { 5999 /* the assoc was freed? */ 6000 return (-19); 6001 } 6002 if (net != NULL) { 6003 /* clear flag */ 6004 net->dest_state &= 6005 ~SCTP_ADDR_NOT_IN_ASSOC; 6006 } 6007 } else { 6008 /* 6009 * strange, address is in another 6010 * assoc? straighten out locks. 6011 */ 6012 if (stcb_tmp) 6013 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6014 /* 6015 * in setup state we 6016 * abort this guy 6017 */ 6018 sctp_abort_an_association(stcb_tmp->sctp_ep, 6019 stcb_tmp, 1, NULL, 0); 6020 goto add_it_now6; 6021 } 6022 SCTP_TCB_UNLOCK(stcb_tmp); 6023 6024 if (stcb->asoc.state == 0) { 6025 /* the assoc was freed? */ 6026 return (-21); 6027 } 6028 return (-22); 6029 } 6030 } 6031 } else if (ptype == SCTP_ECN_CAPABLE) { 6032 stcb->asoc.ecn_allowed = 1; 6033 } else if (ptype == SCTP_ULP_ADAPTATION) { 6034 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6035 struct sctp_adaptation_layer_indication ai, 6036 *aip; 6037 6038 phdr = sctp_get_next_param(m, offset, 6039 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6040 aip = (struct sctp_adaptation_layer_indication *)phdr; 6041 if (aip) { 6042 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6043 stcb->asoc.adaptation_needed = 1; 6044 } 6045 } 6046 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6047 struct sctp_asconf_addr_param lstore, *fee; 6048 struct sctp_asconf_addrv4_param *fii; 6049 int lptype; 6050 struct sockaddr *lsa = NULL; 6051 6052 stcb->asoc.peer_supports_asconf = 1; 6053 if (plen > sizeof(lstore)) { 6054 return (-23); 6055 } 6056 phdr = sctp_get_next_param(m, offset, 6057 (struct sctp_paramhdr *)&lstore, 6058 min(plen, sizeof(lstore))); 6059 if (phdr == NULL) { 6060 return (-24); 6061 } 6062 fee = (struct sctp_asconf_addr_param *)phdr; 6063 lptype = ntohs(fee->addrp.ph.param_type); 6064 if (lptype == SCTP_IPV4_ADDRESS) { 6065 if (plen != 6066 sizeof(struct sctp_asconf_addrv4_param)) { 6067 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6068 (int)sizeof(struct sctp_asconf_addrv4_param), 6069 plen); 6070 } else { 6071 fii = (struct sctp_asconf_addrv4_param *)fee; 6072 sin.sin_addr.s_addr = fii->addrp.addr; 6073 lsa = (struct sockaddr *)&sin; 6074 } 6075 } else if (lptype == SCTP_IPV6_ADDRESS) { 6076 if (plen != 6077 sizeof(struct sctp_asconf_addr_param)) { 6078 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6079 (int)sizeof(struct sctp_asconf_addr_param), 6080 plen); 6081 } else { 6082 memcpy(sin6.sin6_addr.s6_addr, 6083 fee->addrp.addr, 6084 sizeof(fee->addrp.addr)); 6085 lsa = (struct sockaddr *)&sin6; 6086 } 6087 } 6088 if (lsa) { 6089 (void)sctp_set_primary_addr(stcb, sa, NULL); 6090 } 6091 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6092 stcb->asoc.peer_supports_nat = 1; 6093 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6094 /* Peer supports pr-sctp */ 6095 stcb->asoc.peer_supports_prsctp = 1; 6096 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6097 /* A supported extension chunk */ 6098 struct sctp_supported_chunk_types_param *pr_supported; 6099 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6100 int num_ent, i; 6101 6102 phdr = sctp_get_next_param(m, offset, 6103 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6104 if (phdr == NULL) { 6105 return (-25); 6106 } 6107 stcb->asoc.peer_supports_asconf = 0; 6108 stcb->asoc.peer_supports_prsctp = 0; 6109 stcb->asoc.peer_supports_pktdrop = 0; 6110 stcb->asoc.peer_supports_strreset = 0; 6111 stcb->asoc.peer_supports_nr_sack = 0; 6112 stcb->asoc.peer_supports_auth = 0; 6113 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6114 num_ent = plen - sizeof(struct sctp_paramhdr); 6115 for (i = 0; i < num_ent; i++) { 6116 switch (pr_supported->chunk_types[i]) { 6117 case SCTP_ASCONF: 6118 case SCTP_ASCONF_ACK: 6119 stcb->asoc.peer_supports_asconf = 1; 6120 break; 6121 case SCTP_FORWARD_CUM_TSN: 6122 stcb->asoc.peer_supports_prsctp = 1; 6123 break; 6124 case SCTP_PACKET_DROPPED: 6125 stcb->asoc.peer_supports_pktdrop = 1; 6126 break; 6127 case SCTP_NR_SELECTIVE_ACK: 6128 stcb->asoc.peer_supports_nr_sack = 1; 6129 break; 6130 case SCTP_STREAM_RESET: 6131 stcb->asoc.peer_supports_strreset = 1; 6132 break; 6133 case SCTP_AUTHENTICATION: 6134 stcb->asoc.peer_supports_auth = 1; 6135 break; 6136 default: 6137 /* one I have not learned yet */ 6138 break; 6139 6140 } 6141 } 6142 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 6143 /* Peer supports ECN-nonce */ 6144 stcb->asoc.peer_supports_ecn_nonce = 1; 6145 stcb->asoc.ecn_nonce_allowed = 1; 6146 } else if (ptype == SCTP_RANDOM) { 6147 if (plen > sizeof(random_store)) 6148 break; 6149 if (got_random) { 6150 /* already processed a RANDOM */ 6151 goto next_param; 6152 } 6153 phdr = sctp_get_next_param(m, offset, 6154 (struct sctp_paramhdr *)random_store, 6155 min(sizeof(random_store), plen)); 6156 if (phdr == NULL) 6157 return (-26); 6158 p_random = (struct sctp_auth_random *)phdr; 6159 random_len = plen - sizeof(*p_random); 6160 /* enforce the random length */ 6161 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6162 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6163 return (-27); 6164 } 6165 got_random = 1; 6166 } else if (ptype == SCTP_HMAC_LIST) { 6167 int num_hmacs; 6168 int i; 6169 6170 if (plen > sizeof(hmacs_store)) 6171 break; 6172 if (got_hmacs) { 6173 /* already processed a HMAC list */ 6174 goto next_param; 6175 } 6176 phdr = sctp_get_next_param(m, offset, 6177 (struct sctp_paramhdr *)hmacs_store, 6178 min(plen, sizeof(hmacs_store))); 6179 if (phdr == NULL) 6180 return (-28); 6181 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6182 hmacs_len = plen - sizeof(*hmacs); 6183 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6184 /* validate the hmac list */ 6185 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6186 return (-29); 6187 } 6188 if (stcb->asoc.peer_hmacs != NULL) 6189 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6190 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6191 if (stcb->asoc.peer_hmacs != NULL) { 6192 for (i = 0; i < num_hmacs; i++) { 6193 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6194 ntohs(hmacs->hmac_ids[i])); 6195 } 6196 } 6197 got_hmacs = 1; 6198 } else if (ptype == SCTP_CHUNK_LIST) { 6199 int i; 6200 6201 if (plen > sizeof(chunks_store)) 6202 break; 6203 if (got_chklist) { 6204 /* already processed a Chunks list */ 6205 goto next_param; 6206 } 6207 phdr = sctp_get_next_param(m, offset, 6208 (struct sctp_paramhdr *)chunks_store, 6209 min(plen, sizeof(chunks_store))); 6210 if (phdr == NULL) 6211 return (-30); 6212 chunks = (struct sctp_auth_chunk_list *)phdr; 6213 num_chunks = plen - sizeof(*chunks); 6214 if (stcb->asoc.peer_auth_chunks != NULL) 6215 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6216 else 6217 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6218 for (i = 0; i < num_chunks; i++) { 6219 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6220 stcb->asoc.peer_auth_chunks); 6221 /* record asconf/asconf-ack if listed */ 6222 if (chunks->chunk_types[i] == SCTP_ASCONF) 6223 saw_asconf = 1; 6224 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6225 saw_asconf_ack = 1; 6226 6227 } 6228 got_chklist = 1; 6229 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6230 (ptype == SCTP_STATE_COOKIE) || 6231 (ptype == SCTP_UNRECOG_PARAM) || 6232 (ptype == SCTP_COOKIE_PRESERVE) || 6233 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6234 (ptype == SCTP_ADD_IP_ADDRESS) || 6235 (ptype == SCTP_DEL_IP_ADDRESS) || 6236 (ptype == SCTP_ERROR_CAUSE_IND) || 6237 (ptype == SCTP_SUCCESS_REPORT)) { 6238 /* don't care */ ; 6239 } else { 6240 if ((ptype & 0x8000) == 0x0000) { 6241 /* 6242 * must stop processing the rest of the 6243 * param's. Any report bits were handled 6244 * with the call to 6245 * sctp_arethere_unrecognized_parameters() 6246 * when the INIT or INIT-ACK was first seen. 6247 */ 6248 break; 6249 } 6250 } 6251 6252 next_param: 6253 offset += SCTP_SIZE32(plen); 6254 if (offset >= limit) { 6255 break; 6256 } 6257 phdr = sctp_get_next_param(m, offset, &parm_buf, 6258 sizeof(parm_buf)); 6259 } 6260 /* Now check to see if we need to purge any addresses */ 6261 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6262 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6263 SCTP_ADDR_NOT_IN_ASSOC) { 6264 /* This address has been removed from the asoc */ 6265 /* remove and free it */ 6266 stcb->asoc.numnets--; 6267 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6268 sctp_free_remote_addr(net); 6269 if (net == stcb->asoc.primary_destination) { 6270 stcb->asoc.primary_destination = NULL; 6271 sctp_select_primary_destination(stcb); 6272 } 6273 } 6274 } 6275 /* validate authentication required parameters */ 6276 if (got_random && got_hmacs) { 6277 stcb->asoc.peer_supports_auth = 1; 6278 } else { 6279 stcb->asoc.peer_supports_auth = 0; 6280 } 6281 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6282 /* peer does not support auth but sent a chunks list? */ 6283 return (-31); 6284 } 6285 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6286 !stcb->asoc.peer_supports_auth) { 6287 /* peer supports asconf but not auth? */ 6288 return (-32); 6289 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6290 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6291 return (-33); 6292 } 6293 /* concatenate the full random key */ 6294 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6295 if (chunks != NULL) { 6296 keylen += sizeof(*chunks) + num_chunks; 6297 } 6298 new_key = sctp_alloc_key(keylen); 6299 if (new_key != NULL) { 6300 /* copy in the RANDOM */ 6301 if (p_random != NULL) { 6302 keylen = sizeof(*p_random) + random_len; 6303 bcopy(p_random, new_key->key, keylen); 6304 } 6305 /* append in the AUTH chunks */ 6306 if (chunks != NULL) { 6307 bcopy(chunks, new_key->key + keylen, 6308 sizeof(*chunks) + num_chunks); 6309 keylen += sizeof(*chunks) + num_chunks; 6310 } 6311 /* append in the HMACs */ 6312 if (hmacs != NULL) { 6313 bcopy(hmacs, new_key->key + keylen, 6314 sizeof(*hmacs) + hmacs_len); 6315 } 6316 } else { 6317 /* failed to get memory for the key */ 6318 return (-34); 6319 } 6320 if (stcb->asoc.authinfo.peer_random != NULL) 6321 sctp_free_key(stcb->asoc.authinfo.peer_random); 6322 stcb->asoc.authinfo.peer_random = new_key; 6323 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6324 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6325 6326 return (0); 6327 } 6328 6329 int 6330 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6331 struct sctp_nets *net) 6332 { 6333 /* make sure the requested primary address exists in the assoc */ 6334 if (net == NULL && sa) 6335 net = sctp_findnet(stcb, sa); 6336 6337 if (net == NULL) { 6338 /* didn't find the requested primary address! */ 6339 return (-1); 6340 } else { 6341 /* set the primary address */ 6342 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6343 /* Must be confirmed, so queue to set */ 6344 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6345 return (0); 6346 } 6347 stcb->asoc.primary_destination = net; 6348 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 6349 net = TAILQ_FIRST(&stcb->asoc.nets); 6350 if (net != stcb->asoc.primary_destination) { 6351 /* 6352 * first one on the list is NOT the primary 6353 * sctp_cmpaddr() is much more efficient if the 6354 * primary is the first on the list, make it so. 6355 */ 6356 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6357 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6358 } 6359 return (0); 6360 } 6361 } 6362 6363 int 6364 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6365 { 6366 /* 6367 * This function serves two purposes. It will see if a TAG can be 6368 * re-used and return 1 for yes it is ok and 0 for don't use that 6369 * tag. A secondary function it will do is purge out old tags that 6370 * can be removed. 6371 */ 6372 struct sctpvtaghead *chain; 6373 struct sctp_tagblock *twait_block; 6374 struct sctpasochead *head; 6375 struct sctp_tcb *stcb; 6376 int i; 6377 6378 SCTP_INP_INFO_RLOCK(); 6379 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6380 SCTP_BASE_INFO(hashasocmark))]; 6381 if (head == NULL) { 6382 /* invalid vtag */ 6383 goto skip_vtag_check; 6384 } 6385 LIST_FOREACH(stcb, head, sctp_asocs) { 6386 /* 6387 * We choose not to lock anything here. TCB's can't be 6388 * removed since we have the read lock, so they can't be 6389 * freed on us, same thing for the INP. I may be wrong with 6390 * this assumption, but we will go with it for now :-) 6391 */ 6392 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6393 continue; 6394 } 6395 if (stcb->asoc.my_vtag == tag) { 6396 /* candidate */ 6397 if (stcb->rport != rport) { 6398 continue; 6399 } 6400 if (stcb->sctp_ep->sctp_lport != lport) { 6401 continue; 6402 } 6403 /* Its a used tag set */ 6404 SCTP_INP_INFO_RUNLOCK(); 6405 return (0); 6406 } 6407 } 6408 skip_vtag_check: 6409 6410 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6411 /* Now what about timed wait ? */ 6412 if (!LIST_EMPTY(chain)) { 6413 /* 6414 * Block(s) are present, lets see if we have this tag in the 6415 * list 6416 */ 6417 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6418 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6419 if (twait_block->vtag_block[i].v_tag == 0) { 6420 /* not used */ 6421 continue; 6422 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6423 now->tv_sec) { 6424 /* Audit expires this guy */ 6425 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6426 twait_block->vtag_block[i].v_tag = 0; 6427 twait_block->vtag_block[i].lport = 0; 6428 twait_block->vtag_block[i].rport = 0; 6429 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6430 (twait_block->vtag_block[i].lport == lport) && 6431 (twait_block->vtag_block[i].rport == rport)) { 6432 /* Bad tag, sorry :< */ 6433 SCTP_INP_INFO_RUNLOCK(); 6434 return (0); 6435 } 6436 } 6437 } 6438 } 6439 SCTP_INP_INFO_RUNLOCK(); 6440 return (1); 6441 } 6442 6443 6444 static sctp_assoc_t reneged_asoc_ids[256]; 6445 static uint8_t reneged_at = 0; 6446 6447 6448 static void 6449 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6450 { 6451 /* 6452 * We must hunt this association for MBUF's past the cumack (i.e. 6453 * out of order data that we can renege on). 6454 */ 6455 struct sctp_association *asoc; 6456 struct sctp_tmit_chunk *chk, *nchk; 6457 uint32_t cumulative_tsn_p1; 6458 struct sctp_queued_to_read *ctl, *nctl; 6459 int cnt, strmat; 6460 uint32_t gap, i; 6461 int fnd = 0; 6462 6463 /* We look for anything larger than the cum-ack + 1 */ 6464 6465 asoc = &stcb->asoc; 6466 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6467 /* none we can reneg on. */ 6468 return; 6469 } 6470 SCTP_STAT_INCR(sctps_protocol_drains_done); 6471 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6472 cnt = 0; 6473 /* First look in the re-assembly queue */ 6474 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6475 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6476 /* Yep it is above cum-ack */ 6477 cnt++; 6478 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6479 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6480 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6481 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6482 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6483 if (chk->data) { 6484 sctp_m_freem(chk->data); 6485 chk->data = NULL; 6486 } 6487 sctp_free_a_chunk(stcb, chk); 6488 } 6489 } 6490 /* Ok that was fun, now we will drain all the inbound streams? */ 6491 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6492 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6493 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6494 /* Yep it is above cum-ack */ 6495 cnt++; 6496 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6497 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6498 sctp_ucount_decr(asoc->cnt_on_all_streams); 6499 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6500 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6501 if (ctl->data) { 6502 sctp_m_freem(ctl->data); 6503 ctl->data = NULL; 6504 } 6505 sctp_free_remote_addr(ctl->whoFrom); 6506 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6507 SCTP_DECR_READQ_COUNT(); 6508 } 6509 } 6510 } 6511 if (cnt) { 6512 /* We must back down to see what the new highest is */ 6513 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6514 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6515 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6516 asoc->highest_tsn_inside_map = i; 6517 fnd = 1; 6518 break; 6519 } 6520 } 6521 if (!fnd) { 6522 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6523 } 6524 /* 6525 * Question, should we go through the delivery queue? The 6526 * only reason things are on here is the app not reading OR 6527 * a p-d-api up. An attacker COULD send enough in to 6528 * initiate the PD-API and then send a bunch of stuff to 6529 * other streams... these would wind up on the delivery 6530 * queue.. and then we would not get to them. But in order 6531 * to do this I then have to back-track and un-deliver 6532 * sequence numbers in streams.. el-yucko. I think for now 6533 * we will NOT look at the delivery queue and leave it to be 6534 * something to consider later. An alternative would be to 6535 * abort the P-D-API with a notification and then deliver 6536 * the data.... Or another method might be to keep track of 6537 * how many times the situation occurs and if we see a 6538 * possible attack underway just abort the association. 6539 */ 6540 #ifdef SCTP_DEBUG 6541 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6542 #endif 6543 /* 6544 * Now do we need to find a new 6545 * asoc->highest_tsn_inside_map? 6546 */ 6547 asoc->last_revoke_count = cnt; 6548 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6549 /* sa_ignore NO_NULL_CHK */ 6550 sctp_send_sack(stcb); 6551 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6552 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 6553 reneged_at++; 6554 } 6555 /* 6556 * Another issue, in un-setting the TSN's in the mapping array we 6557 * DID NOT adjust the highest_tsn marker. This will cause one of 6558 * two things to occur. It may cause us to do extra work in checking 6559 * for our mapping array movement. More importantly it may cause us 6560 * to SACK every datagram. This may not be a bad thing though since 6561 * we will recover once we get our cum-ack above and all this stuff 6562 * we dumped recovered. 6563 */ 6564 } 6565 6566 void 6567 sctp_drain() 6568 { 6569 /* 6570 * We must walk the PCB lists for ALL associations here. The system 6571 * is LOW on MBUF's and needs help. This is where reneging will 6572 * occur. We really hope this does NOT happen! 6573 */ 6574 VNET_ITERATOR_DECL(vnet_iter); 6575 VNET_LIST_RLOCK_NOSLEEP(); 6576 VNET_FOREACH(vnet_iter) { 6577 CURVNET_SET(vnet_iter); 6578 struct sctp_inpcb *inp; 6579 struct sctp_tcb *stcb; 6580 6581 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6582 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6583 #ifdef VIMAGE 6584 continue; 6585 #else 6586 return; 6587 #endif 6588 } 6589 SCTP_INP_INFO_RLOCK(); 6590 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6591 /* For each endpoint */ 6592 SCTP_INP_RLOCK(inp); 6593 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6594 /* For each association */ 6595 SCTP_TCB_LOCK(stcb); 6596 sctp_drain_mbufs(inp, stcb); 6597 SCTP_TCB_UNLOCK(stcb); 6598 } 6599 SCTP_INP_RUNLOCK(inp); 6600 } 6601 SCTP_INP_INFO_RUNLOCK(); 6602 CURVNET_RESTORE(); 6603 } 6604 VNET_LIST_RUNLOCK_NOSLEEP(); 6605 } 6606 6607 /* 6608 * start a new iterator 6609 * iterates through all endpoints and associations based on the pcb_state 6610 * flags and asoc_state. "af" (mandatory) is executed for all matching 6611 * assocs and "ef" (optional) is executed when the iterator completes. 6612 * "inpf" (optional) is executed for each new endpoint as it is being 6613 * iterated through. inpe (optional) is called when the inp completes 6614 * its way through all the stcbs. 6615 */ 6616 int 6617 sctp_initiate_iterator(inp_func inpf, 6618 asoc_func af, 6619 inp_func inpe, 6620 uint32_t pcb_state, 6621 uint32_t pcb_features, 6622 uint32_t asoc_state, 6623 void *argp, 6624 uint32_t argi, 6625 end_func ef, 6626 struct sctp_inpcb *s_inp, 6627 uint8_t chunk_output_off) 6628 { 6629 struct sctp_iterator *it = NULL; 6630 6631 if (af == NULL) { 6632 return (-1); 6633 } 6634 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6635 SCTP_M_ITER); 6636 if (it == NULL) { 6637 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6638 return (ENOMEM); 6639 } 6640 memset(it, 0, sizeof(*it)); 6641 it->function_assoc = af; 6642 it->function_inp = inpf; 6643 if (inpf) 6644 it->done_current_ep = 0; 6645 else 6646 it->done_current_ep = 1; 6647 it->function_atend = ef; 6648 it->pointer = argp; 6649 it->val = argi; 6650 it->pcb_flags = pcb_state; 6651 it->pcb_features = pcb_features; 6652 it->asoc_state = asoc_state; 6653 it->function_inp_end = inpe; 6654 it->no_chunk_output = chunk_output_off; 6655 it->vn = curvnet; 6656 if (s_inp) { 6657 /* Assume lock is held here */ 6658 it->inp = s_inp; 6659 SCTP_INP_INCR_REF(it->inp); 6660 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6661 } else { 6662 SCTP_INP_INFO_RLOCK(); 6663 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6664 if (it->inp) { 6665 SCTP_INP_INCR_REF(it->inp); 6666 } 6667 SCTP_INP_INFO_RUNLOCK(); 6668 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6669 6670 } 6671 SCTP_IPI_ITERATOR_WQ_LOCK(); 6672 6673 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6674 if (sctp_it_ctl.iterator_running == 0) { 6675 sctp_wakeup_iterator(); 6676 } 6677 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6678 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6679 return (0); 6680 } 6681