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 if ((SCTP_BASE_SYSCTL(sctp_default_cc_module) >= SCTP_CC_RFC2581) && 2520 (SCTP_BASE_SYSCTL(sctp_default_cc_module) <= SCTP_CC_HTCP)) { 2521 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2522 } else { 2523 /* sysctl done with invalid value, set to 2581 */ 2524 m->sctp_default_cc_module = SCTP_CC_RFC2581; 2525 } 2526 /* number of streams to pre-open on a association */ 2527 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2528 2529 /* Add adaptation cookie */ 2530 m->adaptation_layer_indicator = 0x504C5253; 2531 2532 /* seed random number generator */ 2533 m->random_counter = 1; 2534 m->store_at = SCTP_SIGNATURE_SIZE; 2535 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2536 sctp_fill_random_store(m); 2537 2538 /* Minimum cookie size */ 2539 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2540 sizeof(struct sctp_state_cookie); 2541 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2542 2543 /* Setup the initial secret */ 2544 (void)SCTP_GETTIME_TIMEVAL(&time); 2545 m->time_of_secret_change = time.tv_sec; 2546 2547 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2548 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2549 } 2550 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2551 2552 /* How long is a cookie good for ? */ 2553 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2554 /* 2555 * Initialize authentication parameters 2556 */ 2557 m->local_hmacs = sctp_default_supported_hmaclist(); 2558 m->local_auth_chunks = sctp_alloc_chunklist(); 2559 sctp_auth_set_default_chunks(m->local_auth_chunks); 2560 LIST_INIT(&m->shared_keys); 2561 /* add default NULL key as key id 0 */ 2562 null_key = sctp_alloc_sharedkey(); 2563 sctp_insert_sharedkey(&m->shared_keys, null_key); 2564 SCTP_INP_WUNLOCK(inp); 2565 #ifdef SCTP_LOG_CLOSING 2566 sctp_log_closing(inp, NULL, 12); 2567 #endif 2568 return (error); 2569 } 2570 2571 2572 void 2573 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2574 struct sctp_tcb *stcb) 2575 { 2576 struct sctp_nets *net; 2577 uint16_t lport, rport; 2578 struct sctppcbhead *head; 2579 struct sctp_laddr *laddr, *oladdr; 2580 2581 atomic_add_int(&stcb->asoc.refcnt, 1); 2582 SCTP_TCB_UNLOCK(stcb); 2583 SCTP_INP_INFO_WLOCK(); 2584 SCTP_INP_WLOCK(old_inp); 2585 SCTP_INP_WLOCK(new_inp); 2586 SCTP_TCB_LOCK(stcb); 2587 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2588 2589 new_inp->sctp_ep.time_of_secret_change = 2590 old_inp->sctp_ep.time_of_secret_change; 2591 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2592 sizeof(old_inp->sctp_ep.secret_key)); 2593 new_inp->sctp_ep.current_secret_number = 2594 old_inp->sctp_ep.current_secret_number; 2595 new_inp->sctp_ep.last_secret_number = 2596 old_inp->sctp_ep.last_secret_number; 2597 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2598 2599 /* make it so new data pours into the new socket */ 2600 stcb->sctp_socket = new_inp->sctp_socket; 2601 stcb->sctp_ep = new_inp; 2602 2603 /* Copy the port across */ 2604 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2605 rport = stcb->rport; 2606 /* Pull the tcb from the old association */ 2607 LIST_REMOVE(stcb, sctp_tcbhash); 2608 LIST_REMOVE(stcb, sctp_tcblist); 2609 if (stcb->asoc.in_asocid_hash) { 2610 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2611 } 2612 /* Now insert the new_inp into the TCP connected hash */ 2613 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2614 2615 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2616 /* Its safe to access */ 2617 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2618 2619 /* Now move the tcb into the endpoint list */ 2620 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2621 /* 2622 * Question, do we even need to worry about the ep-hash since we 2623 * only have one connection? Probably not :> so lets get rid of it 2624 * and not suck up any kernel memory in that. 2625 */ 2626 if (stcb->asoc.in_asocid_hash) { 2627 struct sctpasochead *lhd; 2628 2629 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2630 new_inp->hashasocidmark)]; 2631 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2632 } 2633 /* Ok. Let's restart timer. */ 2634 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2635 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2636 stcb, net); 2637 } 2638 2639 SCTP_INP_INFO_WUNLOCK(); 2640 if (new_inp->sctp_tcbhash != NULL) { 2641 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2642 new_inp->sctp_tcbhash = NULL; 2643 } 2644 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2645 /* Subset bound, so copy in the laddr list from the old_inp */ 2646 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2647 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2648 if (laddr == NULL) { 2649 /* 2650 * Gak, what can we do? This assoc is really 2651 * HOSED. We probably should send an abort 2652 * here. 2653 */ 2654 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2655 continue; 2656 } 2657 SCTP_INCR_LADDR_COUNT(); 2658 bzero(laddr, sizeof(*laddr)); 2659 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2660 laddr->ifa = oladdr->ifa; 2661 atomic_add_int(&laddr->ifa->refcount, 1); 2662 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2663 sctp_nxt_addr); 2664 new_inp->laddr_count++; 2665 } 2666 } 2667 /* 2668 * Now any running timers need to be adjusted since we really don't 2669 * care if they are running or not just blast in the new_inp into 2670 * all of them. 2671 */ 2672 2673 stcb->asoc.hb_timer.ep = (void *)new_inp; 2674 stcb->asoc.dack_timer.ep = (void *)new_inp; 2675 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2676 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2677 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2678 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2679 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2680 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2681 /* now what about the nets? */ 2682 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2683 net->pmtu_timer.ep = (void *)new_inp; 2684 net->rxt_timer.ep = (void *)new_inp; 2685 net->fr_timer.ep = (void *)new_inp; 2686 } 2687 SCTP_INP_WUNLOCK(new_inp); 2688 SCTP_INP_WUNLOCK(old_inp); 2689 } 2690 2691 2692 2693 2694 /* sctp_ifap is used to bypass normal local address validation checks */ 2695 int 2696 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2697 struct sctp_ifa *sctp_ifap, struct thread *p) 2698 { 2699 /* bind a ep to a socket address */ 2700 struct sctppcbhead *head; 2701 struct sctp_inpcb *inp, *inp_tmp; 2702 struct inpcb *ip_inp; 2703 int port_reuse_active = 0; 2704 int bindall; 2705 uint16_t lport; 2706 int error; 2707 uint32_t vrf_id; 2708 2709 lport = 0; 2710 error = 0; 2711 bindall = 1; 2712 inp = (struct sctp_inpcb *)so->so_pcb; 2713 ip_inp = (struct inpcb *)so->so_pcb; 2714 #ifdef SCTP_DEBUG 2715 if (addr) { 2716 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2717 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2718 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2719 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2720 } 2721 #endif 2722 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2723 /* already did a bind, subsequent binds NOT allowed ! */ 2724 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2725 return (EINVAL); 2726 } 2727 #ifdef INVARIANTS 2728 if (p == NULL) 2729 panic("null proc/thread"); 2730 #endif 2731 if (addr != NULL) { 2732 switch (addr->sa_family) { 2733 case AF_INET: 2734 { 2735 struct sockaddr_in *sin; 2736 2737 /* IPV6_V6ONLY socket? */ 2738 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2739 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2740 return (EINVAL); 2741 } 2742 if (addr->sa_len != sizeof(*sin)) { 2743 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2744 return (EINVAL); 2745 } 2746 sin = (struct sockaddr_in *)addr; 2747 lport = sin->sin_port; 2748 /* 2749 * For LOOPBACK the prison_local_ip4() call 2750 * will transmute the ip address to the 2751 * proper value. 2752 */ 2753 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2754 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2755 return (error); 2756 } 2757 if (sin->sin_addr.s_addr != INADDR_ANY) { 2758 bindall = 0; 2759 } 2760 break; 2761 } 2762 #ifdef INET6 2763 case AF_INET6: 2764 { 2765 /* 2766 * Only for pure IPv6 Address. (No IPv4 2767 * Mapped!) 2768 */ 2769 struct sockaddr_in6 *sin6; 2770 2771 sin6 = (struct sockaddr_in6 *)addr; 2772 2773 if (addr->sa_len != sizeof(*sin6)) { 2774 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2775 return (EINVAL); 2776 } 2777 lport = sin6->sin6_port; 2778 2779 /* 2780 * For LOOPBACK the prison_local_ip6() call 2781 * will transmute the ipv6 address to the 2782 * proper value. 2783 */ 2784 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2785 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2786 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2787 return (error); 2788 } 2789 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2790 bindall = 0; 2791 /* KAME hack: embed scopeid */ 2792 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2793 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2794 return (EINVAL); 2795 } 2796 } 2797 /* this must be cleared for ifa_ifwithaddr() */ 2798 sin6->sin6_scope_id = 0; 2799 break; 2800 } 2801 #endif 2802 default: 2803 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2804 return (EAFNOSUPPORT); 2805 } 2806 } 2807 SCTP_INP_INFO_WLOCK(); 2808 SCTP_INP_WLOCK(inp); 2809 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2810 vrf_id = inp->def_vrf_id; 2811 2812 /* increase our count due to the unlock we do */ 2813 SCTP_INP_INCR_REF(inp); 2814 if (lport) { 2815 /* 2816 * Did the caller specify a port? if so we must see if a ep 2817 * already has this one bound. 2818 */ 2819 /* got to be root to get at low ports */ 2820 if (ntohs(lport) < IPPORT_RESERVED) { 2821 if (p && (error = 2822 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2823 )) { 2824 SCTP_INP_DECR_REF(inp); 2825 SCTP_INP_WUNLOCK(inp); 2826 SCTP_INP_INFO_WUNLOCK(); 2827 return (error); 2828 } 2829 } 2830 if (p == NULL) { 2831 SCTP_INP_DECR_REF(inp); 2832 SCTP_INP_WUNLOCK(inp); 2833 SCTP_INP_INFO_WUNLOCK(); 2834 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2835 return (error); 2836 } 2837 SCTP_INP_WUNLOCK(inp); 2838 if (bindall) { 2839 vrf_id = inp->def_vrf_id; 2840 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2841 if (inp_tmp != NULL) { 2842 /* 2843 * lock guy returned and lower count note 2844 * that we are not bound so inp_tmp should 2845 * NEVER be inp. And it is this inp 2846 * (inp_tmp) that gets the reference bump, 2847 * so we must lower it. 2848 */ 2849 SCTP_INP_DECR_REF(inp_tmp); 2850 /* unlock info */ 2851 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2852 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2853 /* 2854 * Ok, must be one-2-one and 2855 * allowing port re-use 2856 */ 2857 port_reuse_active = 1; 2858 goto continue_anyway; 2859 } 2860 SCTP_INP_DECR_REF(inp); 2861 SCTP_INP_INFO_WUNLOCK(); 2862 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2863 return (EADDRINUSE); 2864 } 2865 } else { 2866 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2867 if (inp_tmp != NULL) { 2868 /* 2869 * lock guy returned and lower count note 2870 * that we are not bound so inp_tmp should 2871 * NEVER be inp. And it is this inp 2872 * (inp_tmp) that gets the reference bump, 2873 * so we must lower it. 2874 */ 2875 SCTP_INP_DECR_REF(inp_tmp); 2876 /* unlock info */ 2877 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2878 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2879 /* 2880 * Ok, must be one-2-one and 2881 * allowing port re-use 2882 */ 2883 port_reuse_active = 1; 2884 goto continue_anyway; 2885 } 2886 SCTP_INP_DECR_REF(inp); 2887 SCTP_INP_INFO_WUNLOCK(); 2888 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2889 return (EADDRINUSE); 2890 } 2891 } 2892 continue_anyway: 2893 SCTP_INP_WLOCK(inp); 2894 if (bindall) { 2895 /* verify that no lport is not used by a singleton */ 2896 if ((port_reuse_active == 0) && 2897 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2898 ) { 2899 /* Sorry someone already has this one bound */ 2900 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2901 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2902 port_reuse_active = 1; 2903 } else { 2904 SCTP_INP_DECR_REF(inp); 2905 SCTP_INP_WUNLOCK(inp); 2906 SCTP_INP_INFO_WUNLOCK(); 2907 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2908 return (EADDRINUSE); 2909 } 2910 } 2911 } 2912 } else { 2913 uint16_t first, last, candidate; 2914 uint16_t count; 2915 int done; 2916 2917 if (ip_inp->inp_flags & INP_HIGHPORT) { 2918 first = MODULE_GLOBAL(ipport_hifirstauto); 2919 last = MODULE_GLOBAL(ipport_hilastauto); 2920 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2921 if (p && (error = 2922 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2923 )) { 2924 SCTP_INP_DECR_REF(inp); 2925 SCTP_INP_WUNLOCK(inp); 2926 SCTP_INP_INFO_WUNLOCK(); 2927 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2928 return (error); 2929 } 2930 first = MODULE_GLOBAL(ipport_lowfirstauto); 2931 last = MODULE_GLOBAL(ipport_lowlastauto); 2932 } else { 2933 first = MODULE_GLOBAL(ipport_firstauto); 2934 last = MODULE_GLOBAL(ipport_lastauto); 2935 } 2936 if (first > last) { 2937 uint16_t temp; 2938 2939 temp = first; 2940 first = last; 2941 last = temp; 2942 } 2943 count = last - first + 1; /* number of candidates */ 2944 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2945 2946 done = 0; 2947 while (!done) { 2948 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2949 done = 1; 2950 } 2951 if (!done) { 2952 if (--count == 0) { 2953 SCTP_INP_DECR_REF(inp); 2954 SCTP_INP_WUNLOCK(inp); 2955 SCTP_INP_INFO_WUNLOCK(); 2956 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2957 return (EADDRINUSE); 2958 } 2959 if (candidate == last) 2960 candidate = first; 2961 else 2962 candidate = candidate + 1; 2963 } 2964 } 2965 lport = htons(candidate); 2966 } 2967 SCTP_INP_DECR_REF(inp); 2968 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2969 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2970 /* 2971 * this really should not happen. The guy did a non-blocking 2972 * bind and then did a close at the same time. 2973 */ 2974 SCTP_INP_WUNLOCK(inp); 2975 SCTP_INP_INFO_WUNLOCK(); 2976 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2977 return (EINVAL); 2978 } 2979 /* ok we look clear to give out this port, so lets setup the binding */ 2980 if (bindall) { 2981 /* binding to all addresses, so just set in the proper flags */ 2982 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2983 /* set the automatic addr changes from kernel flag */ 2984 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2985 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2986 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2987 } else { 2988 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2989 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2990 } 2991 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2992 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2993 } else { 2994 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2995 } 2996 /* 2997 * set the automatic mobility_base from kernel flag (by 2998 * micchie) 2999 */ 3000 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3001 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3002 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3003 } else { 3004 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3005 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3006 } 3007 /* 3008 * set the automatic mobility_fasthandoff from kernel flag 3009 * (by micchie) 3010 */ 3011 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3012 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3013 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3014 } else { 3015 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3016 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3017 } 3018 } else { 3019 /* 3020 * bind specific, make sure flags is off and add a new 3021 * address structure to the sctp_addr_list inside the ep 3022 * structure. 3023 * 3024 * We will need to allocate one and insert it at the head. The 3025 * socketopt call can just insert new addresses in there as 3026 * well. It will also have to do the embed scope kame hack 3027 * too (before adding). 3028 */ 3029 struct sctp_ifa *ifa; 3030 struct sockaddr_storage store_sa; 3031 3032 memset(&store_sa, 0, sizeof(store_sa)); 3033 if (addr->sa_family == AF_INET) { 3034 struct sockaddr_in *sin; 3035 3036 sin = (struct sockaddr_in *)&store_sa; 3037 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3038 sin->sin_port = 0; 3039 } else if (addr->sa_family == AF_INET6) { 3040 struct sockaddr_in6 *sin6; 3041 3042 sin6 = (struct sockaddr_in6 *)&store_sa; 3043 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3044 sin6->sin6_port = 0; 3045 } 3046 /* 3047 * first find the interface with the bound address need to 3048 * zero out the port to find the address! yuck! can't do 3049 * this earlier since need port for sctp_pcb_findep() 3050 */ 3051 if (sctp_ifap != NULL) 3052 ifa = sctp_ifap; 3053 else { 3054 /* 3055 * Note for BSD we hit here always other O/S's will 3056 * pass things in via the sctp_ifap argument 3057 * (Panda). 3058 */ 3059 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3060 vrf_id, SCTP_ADDR_NOT_LOCKED); 3061 } 3062 if (ifa == NULL) { 3063 /* Can't find an interface with that address */ 3064 SCTP_INP_WUNLOCK(inp); 3065 SCTP_INP_INFO_WUNLOCK(); 3066 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3067 return (EADDRNOTAVAIL); 3068 } 3069 if (addr->sa_family == AF_INET6) { 3070 /* GAK, more FIXME IFA lock? */ 3071 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3072 /* Can't bind a non-existent addr. */ 3073 SCTP_INP_WUNLOCK(inp); 3074 SCTP_INP_INFO_WUNLOCK(); 3075 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3076 return (EINVAL); 3077 } 3078 } 3079 /* we're not bound all */ 3080 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3081 /* allow bindx() to send ASCONF's for binding changes */ 3082 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3083 /* clear automatic addr changes from kernel flag */ 3084 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3085 3086 /* add this address to the endpoint list */ 3087 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3088 if (error != 0) { 3089 SCTP_INP_WUNLOCK(inp); 3090 SCTP_INP_INFO_WUNLOCK(); 3091 return (error); 3092 } 3093 inp->laddr_count++; 3094 } 3095 /* find the bucket */ 3096 if (port_reuse_active) { 3097 /* Put it into tcp 1-2-1 hash */ 3098 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3099 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3100 } else { 3101 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3102 } 3103 /* put it in the bucket */ 3104 LIST_INSERT_HEAD(head, inp, sctp_hash); 3105 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3106 head, ntohs(lport), port_reuse_active); 3107 /* set in the port */ 3108 inp->sctp_lport = lport; 3109 3110 /* turn off just the unbound flag */ 3111 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3112 SCTP_INP_WUNLOCK(inp); 3113 SCTP_INP_INFO_WUNLOCK(); 3114 return (0); 3115 } 3116 3117 3118 static void 3119 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3120 { 3121 struct sctp_iterator *it, *nit; 3122 3123 /* 3124 * We enter with the only the ITERATOR_LOCK in place and a write 3125 * lock on the inp_info stuff. 3126 */ 3127 it = sctp_it_ctl.cur_it; 3128 if (it && (it->vn != curvnet)) { 3129 /* Its not looking at our VNET */ 3130 return; 3131 } 3132 if (it && (it->inp == inp)) { 3133 /* 3134 * This is tricky and we hold the iterator lock, but when it 3135 * returns and gets the lock (when we release it) the 3136 * iterator will try to operate on inp. We need to stop that 3137 * from happening. But of course the iterator has a 3138 * reference on the stcb and inp. We can mark it and it will 3139 * stop. 3140 * 3141 * If its a single iterator situation, we set the end iterator 3142 * flag. Otherwise we set the iterator to go to the next 3143 * inp. 3144 * 3145 */ 3146 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3147 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3148 } else { 3149 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3150 } 3151 } 3152 /* 3153 * Now go through and remove any single reference to our inp that 3154 * may be still pending on the list 3155 */ 3156 SCTP_IPI_ITERATOR_WQ_LOCK(); 3157 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3158 if (it->vn != curvnet) { 3159 continue; 3160 } 3161 if (it->inp == inp) { 3162 /* This one points to me is it inp specific? */ 3163 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3164 /* Remove and free this one */ 3165 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3166 it, sctp_nxt_itr); 3167 if (it->function_atend != NULL) { 3168 (*it->function_atend) (it->pointer, it->val); 3169 } 3170 SCTP_FREE(it, SCTP_M_ITER); 3171 } else { 3172 it->inp = LIST_NEXT(it->inp, sctp_list); 3173 if (it->inp) { 3174 SCTP_INP_INCR_REF(it->inp); 3175 } 3176 } 3177 /* 3178 * When its put in the refcnt is incremented so decr 3179 * it 3180 */ 3181 SCTP_INP_DECR_REF(inp); 3182 } 3183 } 3184 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3185 } 3186 3187 /* release sctp_inpcb unbind the port */ 3188 void 3189 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3190 { 3191 /* 3192 * Here we free a endpoint. We must find it (if it is in the Hash 3193 * table) and remove it from there. Then we must also find it in the 3194 * overall list and remove it from there. After all removals are 3195 * complete then any timer has to be stopped. Then start the actual 3196 * freeing. a) Any local lists. b) Any associations. c) The hash of 3197 * all associations. d) finally the ep itself. 3198 */ 3199 struct sctp_pcb *m; 3200 struct sctp_tcb *asoc, *nasoc; 3201 struct sctp_laddr *laddr, *nladdr; 3202 struct inpcb *ip_pcb; 3203 struct socket *so; 3204 int being_refed = 0; 3205 struct sctp_queued_to_read *sq, *nsq; 3206 int cnt; 3207 sctp_sharedkey_t *shared_key, *nshared_key; 3208 3209 3210 #ifdef SCTP_LOG_CLOSING 3211 sctp_log_closing(inp, NULL, 0); 3212 #endif 3213 SCTP_ITERATOR_LOCK(); 3214 /* mark any iterators on the list or being processed */ 3215 sctp_iterator_inp_being_freed(inp); 3216 SCTP_ITERATOR_UNLOCK(); 3217 so = inp->sctp_socket; 3218 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3219 /* been here before.. eeks.. get out of here */ 3220 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3221 #ifdef SCTP_LOG_CLOSING 3222 sctp_log_closing(inp, NULL, 1); 3223 #endif 3224 return; 3225 } 3226 SCTP_ASOC_CREATE_LOCK(inp); 3227 SCTP_INP_INFO_WLOCK(); 3228 3229 SCTP_INP_WLOCK(inp); 3230 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3231 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3232 /* socket is gone, so no more wakeups allowed */ 3233 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3234 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3235 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3236 3237 } 3238 /* First time through we have the socket lock, after that no more. */ 3239 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3240 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3241 3242 if (inp->control) { 3243 sctp_m_freem(inp->control); 3244 inp->control = NULL; 3245 } 3246 if (inp->pkt) { 3247 sctp_m_freem(inp->pkt); 3248 inp->pkt = NULL; 3249 } 3250 m = &inp->sctp_ep; 3251 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3252 * here but I will be nice :> (i.e. 3253 * ip_pcb = ep;) */ 3254 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3255 int cnt_in_sd; 3256 3257 cnt_in_sd = 0; 3258 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3259 SCTP_TCB_LOCK(asoc); 3260 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3261 /* Skip guys being freed */ 3262 cnt_in_sd++; 3263 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3264 /* 3265 * Special case - we did not start a 3266 * kill timer on the asoc due to it 3267 * was not closed. So go ahead and 3268 * start it now. 3269 */ 3270 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3271 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3272 } 3273 SCTP_TCB_UNLOCK(asoc); 3274 continue; 3275 } 3276 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3277 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3278 (asoc->asoc.total_output_queue_size == 0)) { 3279 /* 3280 * If we have data in queue, we don't want 3281 * to just free since the app may have done, 3282 * send()/close or connect/send/close. And 3283 * it wants the data to get across first. 3284 */ 3285 /* Just abandon things in the front states */ 3286 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3287 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3288 cnt_in_sd++; 3289 } 3290 continue; 3291 } 3292 /* Disconnect the socket please */ 3293 asoc->sctp_socket = NULL; 3294 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3295 if ((asoc->asoc.size_on_reasm_queue > 0) || 3296 (asoc->asoc.control_pdapi) || 3297 (asoc->asoc.size_on_all_streams > 0) || 3298 (so && (so->so_rcv.sb_cc > 0)) 3299 ) { 3300 /* Left with Data unread */ 3301 struct mbuf *op_err; 3302 3303 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3304 0, M_DONTWAIT, 1, MT_DATA); 3305 if (op_err) { 3306 /* Fill in the user initiated abort */ 3307 struct sctp_paramhdr *ph; 3308 uint32_t *ippp; 3309 3310 SCTP_BUF_LEN(op_err) = 3311 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3312 ph = mtod(op_err, 3313 struct sctp_paramhdr *); 3314 ph->param_type = htons( 3315 SCTP_CAUSE_USER_INITIATED_ABT); 3316 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3317 ippp = (uint32_t *) (ph + 1); 3318 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3319 } 3320 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3321 #if defined(SCTP_PANIC_ON_ABORT) 3322 panic("inpcb_free does an abort"); 3323 #endif 3324 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3325 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3326 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3327 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3328 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3329 } 3330 if (sctp_free_assoc(inp, asoc, 3331 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3332 cnt_in_sd++; 3333 } 3334 continue; 3335 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3336 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3337 (asoc->asoc.stream_queue_cnt == 0) 3338 ) { 3339 if (asoc->asoc.locked_on_sending) { 3340 goto abort_anyway; 3341 } 3342 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3343 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3344 /* 3345 * there is nothing queued to send, 3346 * so I send shutdown 3347 */ 3348 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 3349 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3350 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3351 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3352 } 3353 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3354 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3355 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3356 asoc->asoc.primary_destination); 3357 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3358 asoc->asoc.primary_destination); 3359 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3360 } 3361 } else { 3362 /* mark into shutdown pending */ 3363 struct sctp_stream_queue_pending *sp; 3364 3365 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3366 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3367 asoc->asoc.primary_destination); 3368 if (asoc->asoc.locked_on_sending) { 3369 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3370 sctp_streamhead); 3371 if (sp == NULL) { 3372 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3373 asoc->asoc.locked_on_sending, 3374 asoc->asoc.locked_on_sending->stream_no); 3375 } else { 3376 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3377 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3378 } 3379 } 3380 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3381 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3382 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3383 struct mbuf *op_err; 3384 3385 abort_anyway: 3386 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3387 0, M_DONTWAIT, 1, MT_DATA); 3388 if (op_err) { 3389 /* 3390 * Fill in the user 3391 * initiated abort 3392 */ 3393 struct sctp_paramhdr *ph; 3394 uint32_t *ippp; 3395 3396 SCTP_BUF_LEN(op_err) = 3397 (sizeof(struct sctp_paramhdr) + 3398 sizeof(uint32_t)); 3399 ph = mtod(op_err, 3400 struct sctp_paramhdr *); 3401 ph->param_type = htons( 3402 SCTP_CAUSE_USER_INITIATED_ABT); 3403 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3404 ippp = (uint32_t *) (ph + 1); 3405 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3406 } 3407 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3408 #if defined(SCTP_PANIC_ON_ABORT) 3409 panic("inpcb_free does an abort"); 3410 #endif 3411 3412 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3413 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3414 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3415 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3416 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3417 } 3418 if (sctp_free_assoc(inp, asoc, 3419 SCTP_PCBFREE_NOFORCE, 3420 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3421 cnt_in_sd++; 3422 } 3423 continue; 3424 } else { 3425 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3426 } 3427 } 3428 cnt_in_sd++; 3429 SCTP_TCB_UNLOCK(asoc); 3430 } 3431 /* now is there some left in our SHUTDOWN state? */ 3432 if (cnt_in_sd) { 3433 #ifdef SCTP_LOG_CLOSING 3434 sctp_log_closing(inp, NULL, 2); 3435 #endif 3436 inp->sctp_socket = NULL; 3437 SCTP_INP_WUNLOCK(inp); 3438 SCTP_ASOC_CREATE_UNLOCK(inp); 3439 SCTP_INP_INFO_WUNLOCK(); 3440 return; 3441 } 3442 } 3443 inp->sctp_socket = NULL; 3444 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3445 SCTP_PCB_FLAGS_UNBOUND) { 3446 /* 3447 * ok, this guy has been bound. It's port is somewhere in 3448 * the SCTP_BASE_INFO(hash table). Remove it! 3449 */ 3450 LIST_REMOVE(inp, sctp_hash); 3451 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3452 } 3453 /* 3454 * If there is a timer running to kill us, forget it, since it may 3455 * have a contest on the INP lock.. which would cause us to die ... 3456 */ 3457 cnt = 0; 3458 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3459 SCTP_TCB_LOCK(asoc); 3460 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3461 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3462 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3463 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3464 } 3465 cnt++; 3466 SCTP_TCB_UNLOCK(asoc); 3467 continue; 3468 } 3469 /* Free associations that are NOT killing us */ 3470 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3471 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3472 struct mbuf *op_err; 3473 uint32_t *ippp; 3474 3475 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3476 0, M_DONTWAIT, 1, MT_DATA); 3477 if (op_err) { 3478 /* Fill in the user initiated abort */ 3479 struct sctp_paramhdr *ph; 3480 3481 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3482 sizeof(uint32_t)); 3483 ph = mtod(op_err, struct sctp_paramhdr *); 3484 ph->param_type = htons( 3485 SCTP_CAUSE_USER_INITIATED_ABT); 3486 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3487 ippp = (uint32_t *) (ph + 1); 3488 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3489 3490 } 3491 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3492 #if defined(SCTP_PANIC_ON_ABORT) 3493 panic("inpcb_free does an abort"); 3494 #endif 3495 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3496 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3497 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3498 cnt++; 3499 SCTP_TCB_UNLOCK(asoc); 3500 continue; 3501 } 3502 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3503 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3504 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3505 } 3506 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3507 cnt++; 3508 } 3509 } 3510 if (cnt) { 3511 /* Ok we have someone out there that will kill us */ 3512 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3513 #ifdef SCTP_LOG_CLOSING 3514 sctp_log_closing(inp, NULL, 3); 3515 #endif 3516 SCTP_INP_WUNLOCK(inp); 3517 SCTP_ASOC_CREATE_UNLOCK(inp); 3518 SCTP_INP_INFO_WUNLOCK(); 3519 return; 3520 } 3521 if (SCTP_INP_LOCK_CONTENDED(inp)) 3522 being_refed++; 3523 if (SCTP_INP_READ_CONTENDED(inp)) 3524 being_refed++; 3525 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3526 being_refed++; 3527 3528 if ((inp->refcount) || 3529 (being_refed) || 3530 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3531 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3532 #ifdef SCTP_LOG_CLOSING 3533 sctp_log_closing(inp, NULL, 4); 3534 #endif 3535 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3536 SCTP_INP_WUNLOCK(inp); 3537 SCTP_ASOC_CREATE_UNLOCK(inp); 3538 SCTP_INP_INFO_WUNLOCK(); 3539 return; 3540 } 3541 inp->sctp_ep.signature_change.type = 0; 3542 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3543 /* 3544 * Remove it from the list .. last thing we need a lock for. 3545 */ 3546 LIST_REMOVE(inp, sctp_list); 3547 SCTP_INP_WUNLOCK(inp); 3548 SCTP_ASOC_CREATE_UNLOCK(inp); 3549 SCTP_INP_INFO_WUNLOCK(); 3550 /* 3551 * Now we release all locks. Since this INP cannot be found anymore 3552 * except possibly by the kill timer that might be running. We call 3553 * the drain function here. It should hit the case were it sees the 3554 * ACTIVE flag cleared and exit out freeing us to proceed and 3555 * destroy everything. 3556 */ 3557 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3558 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3559 } else { 3560 /* Probably un-needed */ 3561 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3562 } 3563 3564 #ifdef SCTP_LOG_CLOSING 3565 sctp_log_closing(inp, NULL, 5); 3566 #endif 3567 3568 3569 if ((inp->sctp_asocidhash) != NULL) { 3570 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3571 inp->sctp_asocidhash = NULL; 3572 } 3573 /* sa_ignore FREED_MEMORY */ 3574 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3575 /* Its only abandoned if it had data left */ 3576 if (sq->length) 3577 SCTP_STAT_INCR(sctps_left_abandon); 3578 3579 TAILQ_REMOVE(&inp->read_queue, sq, next); 3580 sctp_free_remote_addr(sq->whoFrom); 3581 if (so) 3582 so->so_rcv.sb_cc -= sq->length; 3583 if (sq->data) { 3584 sctp_m_freem(sq->data); 3585 sq->data = NULL; 3586 } 3587 /* 3588 * no need to free the net count, since at this point all 3589 * assoc's are gone. 3590 */ 3591 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3592 SCTP_DECR_READQ_COUNT(); 3593 } 3594 /* Now the sctp_pcb things */ 3595 /* 3596 * free each asoc if it is not already closed/free. we can't use the 3597 * macro here since le_next will get freed as part of the 3598 * sctp_free_assoc() call. 3599 */ 3600 cnt = 0; 3601 if (so) { 3602 #ifdef IPSEC 3603 ipsec_delete_pcbpolicy(ip_pcb); 3604 #endif /* IPSEC */ 3605 3606 /* Unlocks not needed since the socket is gone now */ 3607 } 3608 if (ip_pcb->inp_options) { 3609 (void)sctp_m_free(ip_pcb->inp_options); 3610 ip_pcb->inp_options = 0; 3611 } 3612 if (ip_pcb->inp_moptions) { 3613 inp_freemoptions(ip_pcb->inp_moptions); 3614 ip_pcb->inp_moptions = 0; 3615 } 3616 #ifdef INET6 3617 if (ip_pcb->inp_vflag & INP_IPV6) { 3618 struct in6pcb *in6p; 3619 3620 in6p = (struct in6pcb *)inp; 3621 ip6_freepcbopts(in6p->in6p_outputopts); 3622 } 3623 #endif /* INET6 */ 3624 ip_pcb->inp_vflag = 0; 3625 /* free up authentication fields */ 3626 if (inp->sctp_ep.local_auth_chunks != NULL) 3627 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3628 if (inp->sctp_ep.local_hmacs != NULL) 3629 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3630 3631 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3632 LIST_REMOVE(shared_key, next); 3633 sctp_free_sharedkey(shared_key); 3634 /* sa_ignore FREED_MEMORY */ 3635 } 3636 3637 /* 3638 * if we have an address list the following will free the list of 3639 * ifaddr's that are set into this ep. Again macro limitations here, 3640 * since the LIST_FOREACH could be a bad idea. 3641 */ 3642 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3643 sctp_remove_laddr(laddr); 3644 } 3645 3646 #ifdef SCTP_TRACK_FREED_ASOCS 3647 /* TEMP CODE */ 3648 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3649 LIST_REMOVE(asoc, sctp_tcblist); 3650 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3651 SCTP_DECR_ASOC_COUNT(); 3652 } 3653 /* *** END TEMP CODE *** */ 3654 #endif 3655 /* Now lets see about freeing the EP hash table. */ 3656 if (inp->sctp_tcbhash != NULL) { 3657 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3658 inp->sctp_tcbhash = NULL; 3659 } 3660 /* Now we must put the ep memory back into the zone pool */ 3661 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3662 SCTP_INP_LOCK_DESTROY(inp); 3663 SCTP_INP_READ_DESTROY(inp); 3664 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3665 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3666 SCTP_DECR_EP_COUNT(); 3667 } 3668 3669 3670 struct sctp_nets * 3671 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3672 { 3673 struct sctp_nets *net; 3674 3675 /* locate the address */ 3676 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3677 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3678 return (net); 3679 } 3680 return (NULL); 3681 } 3682 3683 3684 int 3685 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3686 { 3687 struct sctp_ifa *sctp_ifa; 3688 3689 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3690 if (sctp_ifa) { 3691 return (1); 3692 } else { 3693 return (0); 3694 } 3695 } 3696 3697 /* 3698 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3699 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3700 * stats of stuff. 3701 */ 3702 int 3703 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3704 int set_scope, int from) 3705 { 3706 /* 3707 * The following is redundant to the same lines in the 3708 * sctp_aloc_assoc() but is needed since others call the add address 3709 * function 3710 */ 3711 struct sctp_nets *net, *netfirst; 3712 int addr_inscope; 3713 3714 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3715 from); 3716 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3717 3718 netfirst = sctp_findnet(stcb, newaddr); 3719 if (netfirst) { 3720 /* 3721 * Lie and return ok, we don't want to make the association 3722 * go away for this behavior. It will happen in the TCP 3723 * model in a connected socket. It does not reach the hash 3724 * table until after the association is built so it can't be 3725 * found. Mark as reachable, since the initial creation will 3726 * have been cleared and the NOT_IN_ASSOC flag will have 3727 * been added... and we don't want to end up removing it 3728 * back out. 3729 */ 3730 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3731 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3732 SCTP_ADDR_UNCONFIRMED); 3733 } else { 3734 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3735 } 3736 3737 return (0); 3738 } 3739 addr_inscope = 1; 3740 if (newaddr->sa_family == AF_INET) { 3741 struct sockaddr_in *sin; 3742 3743 sin = (struct sockaddr_in *)newaddr; 3744 if (sin->sin_addr.s_addr == 0) { 3745 /* Invalid address */ 3746 return (-1); 3747 } 3748 /* zero out the bzero area */ 3749 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3750 3751 /* assure len is set */ 3752 sin->sin_len = sizeof(struct sockaddr_in); 3753 if (set_scope) { 3754 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3755 stcb->ipv4_local_scope = 1; 3756 #else 3757 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3758 stcb->asoc.ipv4_local_scope = 1; 3759 } 3760 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3761 } else { 3762 /* Validate the address is in scope */ 3763 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3764 (stcb->asoc.ipv4_local_scope == 0)) { 3765 addr_inscope = 0; 3766 } 3767 } 3768 #ifdef INET6 3769 } else if (newaddr->sa_family == AF_INET6) { 3770 struct sockaddr_in6 *sin6; 3771 3772 sin6 = (struct sockaddr_in6 *)newaddr; 3773 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3774 /* Invalid address */ 3775 return (-1); 3776 } 3777 /* assure len is set */ 3778 sin6->sin6_len = sizeof(struct sockaddr_in6); 3779 if (set_scope) { 3780 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3781 stcb->asoc.loopback_scope = 1; 3782 stcb->asoc.local_scope = 0; 3783 stcb->asoc.ipv4_local_scope = 1; 3784 stcb->asoc.site_scope = 1; 3785 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3786 /* 3787 * If the new destination is a LINK_LOCAL we 3788 * must have common site scope. Don't set 3789 * the local scope since we may not share 3790 * all links, only loopback can do this. 3791 * Links on the local network would also be 3792 * on our private network for v4 too. 3793 */ 3794 stcb->asoc.ipv4_local_scope = 1; 3795 stcb->asoc.site_scope = 1; 3796 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3797 /* 3798 * If the new destination is SITE_LOCAL then 3799 * we must have site scope in common. 3800 */ 3801 stcb->asoc.site_scope = 1; 3802 } 3803 } else { 3804 /* Validate the address is in scope */ 3805 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3806 (stcb->asoc.loopback_scope == 0)) { 3807 addr_inscope = 0; 3808 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3809 (stcb->asoc.local_scope == 0)) { 3810 addr_inscope = 0; 3811 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3812 (stcb->asoc.site_scope == 0)) { 3813 addr_inscope = 0; 3814 } 3815 } 3816 #endif 3817 } else { 3818 /* not supported family type */ 3819 return (-1); 3820 } 3821 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3822 if (net == NULL) { 3823 return (-1); 3824 } 3825 SCTP_INCR_RADDR_COUNT(); 3826 bzero(net, sizeof(*net)); 3827 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3828 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3829 if (newaddr->sa_family == AF_INET) { 3830 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3831 } else if (newaddr->sa_family == AF_INET6) { 3832 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3833 } 3834 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3835 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3836 stcb->asoc.loopback_scope = 1; 3837 stcb->asoc.ipv4_local_scope = 1; 3838 stcb->asoc.local_scope = 0; 3839 stcb->asoc.site_scope = 1; 3840 addr_inscope = 1; 3841 } 3842 net->failure_threshold = stcb->asoc.def_net_failure; 3843 if (addr_inscope == 0) { 3844 net->dest_state = (SCTP_ADDR_REACHABLE | 3845 SCTP_ADDR_OUT_OF_SCOPE); 3846 } else { 3847 if (from == SCTP_ADDR_IS_CONFIRMED) 3848 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3849 net->dest_state = SCTP_ADDR_REACHABLE; 3850 else 3851 net->dest_state = SCTP_ADDR_REACHABLE | 3852 SCTP_ADDR_UNCONFIRMED; 3853 } 3854 /* 3855 * We set this to 0, the timer code knows that this means its an 3856 * initial value 3857 */ 3858 net->RTO = 0; 3859 net->RTO_measured = 0; 3860 stcb->asoc.numnets++; 3861 *(&net->ref_count) = 1; 3862 net->tos_flowlabel = 0; 3863 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 3864 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 3865 } else { 3866 net->port = 0; 3867 } 3868 #ifdef INET 3869 if (newaddr->sa_family == AF_INET) 3870 net->tos_flowlabel = stcb->asoc.default_tos; 3871 #endif 3872 #ifdef INET6 3873 if (newaddr->sa_family == AF_INET6) 3874 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3875 #endif 3876 /* Init the timer structure */ 3877 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3878 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3879 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3880 3881 /* Now generate a route for this guy */ 3882 #ifdef INET6 3883 /* KAME hack: embed scopeid */ 3884 if (newaddr->sa_family == AF_INET6) { 3885 struct sockaddr_in6 *sin6; 3886 3887 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3888 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3889 sin6->sin6_scope_id = 0; 3890 } 3891 #endif 3892 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3893 3894 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3895 /* Get source address */ 3896 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3897 stcb, 3898 (sctp_route_t *) & net->ro, 3899 net, 3900 0, 3901 stcb->asoc.vrf_id); 3902 /* Now get the interface MTU */ 3903 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3904 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3905 } else { 3906 net->mtu = 0; 3907 } 3908 if (net->mtu == 0) { 3909 /* Huh ?? */ 3910 net->mtu = SCTP_DEFAULT_MTU; 3911 } else { 3912 uint32_t rmtu; 3913 3914 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3915 if (rmtu == 0) { 3916 /* 3917 * Start things off to match mtu of 3918 * interface please. 3919 */ 3920 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3921 net->ro.ro_rt, net->mtu); 3922 } else { 3923 /* 3924 * we take the route mtu over the interface, 3925 * since the route may be leading out the 3926 * loopback, or a different interface. 3927 */ 3928 net->mtu = rmtu; 3929 } 3930 } 3931 if (from == SCTP_ALLOC_ASOC) { 3932 stcb->asoc.smallest_mtu = net->mtu; 3933 } 3934 } else { 3935 net->mtu = stcb->asoc.smallest_mtu; 3936 } 3937 #ifdef INET6 3938 if (newaddr->sa_family == AF_INET6) { 3939 struct sockaddr_in6 *sin6; 3940 3941 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3942 (void)sa6_recoverscope(sin6); 3943 } 3944 #endif 3945 if (net->port) { 3946 net->mtu -= sizeof(struct udphdr); 3947 } 3948 if (stcb->asoc.smallest_mtu > net->mtu) { 3949 stcb->asoc.smallest_mtu = net->mtu; 3950 } 3951 /* JRS - Use the congestion control given in the CC module */ 3952 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 3953 3954 /* 3955 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3956 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3957 */ 3958 net->find_pseudo_cumack = 1; 3959 net->find_rtx_pseudo_cumack = 1; 3960 net->src_addr_selected = 0; 3961 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3962 if (net->ro.ro_rt == NULL) { 3963 /* Since we have no route put it at the back */ 3964 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3965 } else if (netfirst == NULL) { 3966 /* We are the first one in the pool. */ 3967 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3968 } else if (netfirst->ro.ro_rt == NULL) { 3969 /* 3970 * First one has NO route. Place this one ahead of the first 3971 * one. 3972 */ 3973 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3974 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3975 /* 3976 * This one has a different interface than the one at the 3977 * top of the list. Place it ahead. 3978 */ 3979 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3980 } else { 3981 /* 3982 * Ok we have the same interface as the first one. Move 3983 * forward until we find either a) one with a NULL route... 3984 * insert ahead of that b) one with a different ifp.. insert 3985 * after that. c) end of the list.. insert at the tail. 3986 */ 3987 struct sctp_nets *netlook; 3988 3989 do { 3990 netlook = TAILQ_NEXT(netfirst, sctp_next); 3991 if (netlook == NULL) { 3992 /* End of the list */ 3993 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3994 break; 3995 } else if (netlook->ro.ro_rt == NULL) { 3996 /* next one has NO route */ 3997 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 3998 break; 3999 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4000 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4001 net, sctp_next); 4002 break; 4003 } 4004 /* Shift forward */ 4005 netfirst = netlook; 4006 } while (netlook != NULL); 4007 } 4008 4009 /* got to have a primary set */ 4010 if (stcb->asoc.primary_destination == 0) { 4011 stcb->asoc.primary_destination = net; 4012 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4013 (net->ro.ro_rt) && 4014 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4015 /* No route to current primary adopt new primary */ 4016 stcb->asoc.primary_destination = net; 4017 } 4018 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 4019 net); 4020 /* Validate primary is first */ 4021 net = TAILQ_FIRST(&stcb->asoc.nets); 4022 if ((net != stcb->asoc.primary_destination) && 4023 (stcb->asoc.primary_destination)) { 4024 /* 4025 * first one on the list is NOT the primary sctp_cmpaddr() 4026 * is much more efficient if the primary is the first on the 4027 * list, make it so. 4028 */ 4029 TAILQ_REMOVE(&stcb->asoc.nets, 4030 stcb->asoc.primary_destination, sctp_next); 4031 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4032 stcb->asoc.primary_destination, sctp_next); 4033 } 4034 return (0); 4035 } 4036 4037 4038 static uint32_t 4039 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4040 { 4041 uint32_t id; 4042 struct sctpasochead *head; 4043 struct sctp_tcb *lstcb; 4044 4045 SCTP_INP_WLOCK(inp); 4046 try_again: 4047 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4048 /* TSNH */ 4049 SCTP_INP_WUNLOCK(inp); 4050 return (0); 4051 } 4052 /* 4053 * We don't allow assoc id to be 0, this is needed otherwise if the 4054 * id were to wrap we would have issues with some socket options. 4055 */ 4056 if (inp->sctp_associd_counter == 0) { 4057 inp->sctp_associd_counter++; 4058 } 4059 id = inp->sctp_associd_counter; 4060 inp->sctp_associd_counter++; 4061 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4062 if (lstcb) { 4063 goto try_again; 4064 } 4065 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4066 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4067 stcb->asoc.in_asocid_hash = 1; 4068 SCTP_INP_WUNLOCK(inp); 4069 return id; 4070 } 4071 4072 /* 4073 * allocate an association and add it to the endpoint. The caller must be 4074 * careful to add all additional addresses once they are know right away or 4075 * else the assoc will be may experience a blackout scenario. 4076 */ 4077 struct sctp_tcb * 4078 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4079 int *error, uint32_t override_tag, uint32_t vrf_id, 4080 struct thread *p 4081 ) 4082 { 4083 /* note the p argument is only valid in unbound sockets */ 4084 4085 struct sctp_tcb *stcb; 4086 struct sctp_association *asoc; 4087 struct sctpasochead *head; 4088 uint16_t rport; 4089 int err; 4090 4091 /* 4092 * Assumption made here: Caller has done a 4093 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4094 * address does not exist already. 4095 */ 4096 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4097 /* Hit max assoc, sorry no more */ 4098 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4099 *error = ENOBUFS; 4100 return (NULL); 4101 } 4102 if (firstaddr == NULL) { 4103 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4104 *error = EINVAL; 4105 return (NULL); 4106 } 4107 SCTP_INP_RLOCK(inp); 4108 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4109 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4110 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4111 /* 4112 * If its in the TCP pool, its NOT allowed to create an 4113 * association. The parent listener needs to call 4114 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4115 * off, or connected one does this.. its an error. 4116 */ 4117 SCTP_INP_RUNLOCK(inp); 4118 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4119 *error = EINVAL; 4120 return (NULL); 4121 } 4122 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4123 #ifdef SCTP_DEBUG 4124 if (firstaddr) { 4125 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4126 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4127 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4128 } else { 4129 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4130 } 4131 #endif /* SCTP_DEBUG */ 4132 if (firstaddr->sa_family == AF_INET) { 4133 struct sockaddr_in *sin; 4134 4135 sin = (struct sockaddr_in *)firstaddr; 4136 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 4137 /* Invalid address */ 4138 SCTP_INP_RUNLOCK(inp); 4139 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4140 *error = EINVAL; 4141 return (NULL); 4142 } 4143 rport = sin->sin_port; 4144 } else if (firstaddr->sa_family == AF_INET6) { 4145 struct sockaddr_in6 *sin6; 4146 4147 sin6 = (struct sockaddr_in6 *)firstaddr; 4148 if ((sin6->sin6_port == 0) || 4149 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 4150 /* Invalid address */ 4151 SCTP_INP_RUNLOCK(inp); 4152 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4153 *error = EINVAL; 4154 return (NULL); 4155 } 4156 rport = sin6->sin6_port; 4157 } else { 4158 /* not supported family type */ 4159 SCTP_INP_RUNLOCK(inp); 4160 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4161 *error = EINVAL; 4162 return (NULL); 4163 } 4164 SCTP_INP_RUNLOCK(inp); 4165 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4166 /* 4167 * If you have not performed a bind, then we need to do the 4168 * ephemeral bind for you. 4169 */ 4170 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4171 (struct sockaddr *)NULL, 4172 (struct sctp_ifa *)NULL, 4173 p 4174 ))) { 4175 /* bind error, probably perm */ 4176 *error = err; 4177 return (NULL); 4178 } 4179 } 4180 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4181 if (stcb == NULL) { 4182 /* out of memory? */ 4183 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4184 *error = ENOMEM; 4185 return (NULL); 4186 } 4187 SCTP_INCR_ASOC_COUNT(); 4188 4189 bzero(stcb, sizeof(*stcb)); 4190 asoc = &stcb->asoc; 4191 4192 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4193 SCTP_TCB_LOCK_INIT(stcb); 4194 SCTP_TCB_SEND_LOCK_INIT(stcb); 4195 stcb->rport = rport; 4196 /* setup back pointer's */ 4197 stcb->sctp_ep = inp; 4198 stcb->sctp_socket = inp->sctp_socket; 4199 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4200 /* failed */ 4201 SCTP_TCB_LOCK_DESTROY(stcb); 4202 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4203 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4204 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4205 SCTP_DECR_ASOC_COUNT(); 4206 *error = err; 4207 return (NULL); 4208 } 4209 /* and the port */ 4210 SCTP_INP_INFO_WLOCK(); 4211 SCTP_INP_WLOCK(inp); 4212 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4213 /* inpcb freed while alloc going on */ 4214 SCTP_TCB_LOCK_DESTROY(stcb); 4215 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4216 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4217 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4218 SCTP_INP_WUNLOCK(inp); 4219 SCTP_INP_INFO_WUNLOCK(); 4220 SCTP_DECR_ASOC_COUNT(); 4221 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4222 *error = EINVAL; 4223 return (NULL); 4224 } 4225 SCTP_TCB_LOCK(stcb); 4226 4227 /* now that my_vtag is set, add it to the hash */ 4228 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4229 /* put it in the bucket in the vtag hash of assoc's for the system */ 4230 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4231 SCTP_INP_INFO_WUNLOCK(); 4232 4233 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4234 /* failure.. memory error? */ 4235 if (asoc->strmout) { 4236 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4237 asoc->strmout = NULL; 4238 } 4239 if (asoc->mapping_array) { 4240 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4241 asoc->mapping_array = NULL; 4242 } 4243 if (asoc->nr_mapping_array) { 4244 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4245 asoc->nr_mapping_array = NULL; 4246 } 4247 SCTP_DECR_ASOC_COUNT(); 4248 SCTP_TCB_LOCK_DESTROY(stcb); 4249 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4250 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4251 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4252 SCTP_INP_WUNLOCK(inp); 4253 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4254 *error = ENOBUFS; 4255 return (NULL); 4256 } 4257 /* Init all the timers */ 4258 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 4259 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4260 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4261 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4262 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4263 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4264 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4265 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4266 4267 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4268 /* now file the port under the hash as well */ 4269 if (inp->sctp_tcbhash != NULL) { 4270 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4271 inp->sctp_hashmark)]; 4272 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4273 } 4274 SCTP_INP_WUNLOCK(inp); 4275 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4276 return (stcb); 4277 } 4278 4279 4280 void 4281 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4282 { 4283 struct sctp_association *asoc; 4284 4285 asoc = &stcb->asoc; 4286 asoc->numnets--; 4287 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4288 if (net == asoc->primary_destination) { 4289 /* Reset primary */ 4290 struct sctp_nets *lnet; 4291 4292 lnet = TAILQ_FIRST(&asoc->nets); 4293 /* 4294 * Mobility adaptation Ideally, if deleted destination is 4295 * the primary, it becomes a fast retransmission trigger by 4296 * the subsequent SET PRIMARY. (by micchie) 4297 */ 4298 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4299 SCTP_MOBILITY_BASE) || 4300 sctp_is_mobility_feature_on(stcb->sctp_ep, 4301 SCTP_MOBILITY_FASTHANDOFF)) { 4302 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4303 if (asoc->deleted_primary != NULL) { 4304 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4305 goto out; 4306 } 4307 asoc->deleted_primary = net; 4308 atomic_add_int(&net->ref_count, 1); 4309 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4310 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4311 sctp_mobility_feature_on(stcb->sctp_ep, 4312 SCTP_MOBILITY_PRIM_DELETED); 4313 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4314 stcb->sctp_ep, stcb, NULL); 4315 } 4316 out: 4317 /* Try to find a confirmed primary */ 4318 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4319 } 4320 if (net == asoc->last_data_chunk_from) { 4321 /* Reset primary */ 4322 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4323 } 4324 if (net == asoc->last_control_chunk_from) { 4325 /* Clear net */ 4326 asoc->last_control_chunk_from = NULL; 4327 } 4328 sctp_free_remote_addr(net); 4329 } 4330 4331 /* 4332 * remove a remote endpoint address from an association, it will fail if the 4333 * address does not exist. 4334 */ 4335 int 4336 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4337 { 4338 /* 4339 * Here we need to remove a remote address. This is quite simple, we 4340 * first find it in the list of address for the association 4341 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4342 * on that item. Note we do not allow it to be removed if there are 4343 * no other addresses. 4344 */ 4345 struct sctp_association *asoc; 4346 struct sctp_nets *net, *nnet; 4347 4348 asoc = &stcb->asoc; 4349 4350 /* locate the address */ 4351 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4352 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4353 continue; 4354 } 4355 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4356 remaddr)) { 4357 /* we found the guy */ 4358 if (asoc->numnets < 2) { 4359 /* Must have at LEAST two remote addresses */ 4360 return (-1); 4361 } else { 4362 sctp_remove_net(stcb, net); 4363 return (0); 4364 } 4365 } 4366 } 4367 /* not found. */ 4368 return (-2); 4369 } 4370 4371 void 4372 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4373 { 4374 struct sctpvtaghead *chain; 4375 struct sctp_tagblock *twait_block; 4376 int found = 0; 4377 int i; 4378 4379 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4380 if (!LIST_EMPTY(chain)) { 4381 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4382 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4383 if ((twait_block->vtag_block[i].v_tag == tag) && 4384 (twait_block->vtag_block[i].lport == lport) && 4385 (twait_block->vtag_block[i].rport == rport)) { 4386 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4387 twait_block->vtag_block[i].v_tag = 0; 4388 twait_block->vtag_block[i].lport = 0; 4389 twait_block->vtag_block[i].rport = 0; 4390 found = 1; 4391 break; 4392 } 4393 } 4394 if (found) 4395 break; 4396 } 4397 } 4398 } 4399 4400 int 4401 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4402 { 4403 struct sctpvtaghead *chain; 4404 struct sctp_tagblock *twait_block; 4405 int found = 0; 4406 int i; 4407 4408 SCTP_INP_INFO_WLOCK(); 4409 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4410 if (!LIST_EMPTY(chain)) { 4411 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4412 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4413 if ((twait_block->vtag_block[i].v_tag == tag) && 4414 (twait_block->vtag_block[i].lport == lport) && 4415 (twait_block->vtag_block[i].rport == rport)) { 4416 found = 1; 4417 break; 4418 } 4419 } 4420 if (found) 4421 break; 4422 } 4423 } 4424 SCTP_INP_INFO_WUNLOCK(); 4425 return (found); 4426 } 4427 4428 4429 void 4430 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4431 { 4432 struct sctpvtaghead *chain; 4433 struct sctp_tagblock *twait_block; 4434 struct timeval now; 4435 int set, i; 4436 4437 if (time == 0) { 4438 /* Its disabled */ 4439 return; 4440 } 4441 (void)SCTP_GETTIME_TIMEVAL(&now); 4442 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4443 set = 0; 4444 if (!LIST_EMPTY(chain)) { 4445 /* Block(s) present, lets find space, and expire on the fly */ 4446 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4447 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4448 if ((twait_block->vtag_block[i].v_tag == 0) && 4449 !set) { 4450 twait_block->vtag_block[i].tv_sec_at_expire = 4451 now.tv_sec + time; 4452 twait_block->vtag_block[i].v_tag = tag; 4453 twait_block->vtag_block[i].lport = lport; 4454 twait_block->vtag_block[i].rport = rport; 4455 set = 1; 4456 } else if ((twait_block->vtag_block[i].v_tag) && 4457 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4458 /* Audit expires this guy */ 4459 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4460 twait_block->vtag_block[i].v_tag = 0; 4461 twait_block->vtag_block[i].lport = 0; 4462 twait_block->vtag_block[i].rport = 0; 4463 if (set == 0) { 4464 /* Reuse it for my new tag */ 4465 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4466 twait_block->vtag_block[i].v_tag = tag; 4467 twait_block->vtag_block[i].lport = lport; 4468 twait_block->vtag_block[i].rport = rport; 4469 set = 1; 4470 } 4471 } 4472 } 4473 if (set) { 4474 /* 4475 * We only do up to the block where we can 4476 * place our tag for audits 4477 */ 4478 break; 4479 } 4480 } 4481 } 4482 /* Need to add a new block to chain */ 4483 if (!set) { 4484 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4485 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4486 if (twait_block == NULL) { 4487 #ifdef INVARIANTS 4488 panic("Can not alloc tagblock"); 4489 #endif 4490 return; 4491 } 4492 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4493 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4494 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4495 twait_block->vtag_block[0].v_tag = tag; 4496 twait_block->vtag_block[0].lport = lport; 4497 twait_block->vtag_block[0].rport = rport; 4498 } 4499 } 4500 4501 4502 4503 /*- 4504 * Free the association after un-hashing the remote port. This 4505 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4506 * expect that the input to this function IS a locked TCB. 4507 * It will return 0, if it did NOT destroy the association (instead 4508 * it unlocks it. It will return NON-zero if it either destroyed the 4509 * association OR the association is already destroyed. 4510 */ 4511 int 4512 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4513 { 4514 int i; 4515 struct sctp_association *asoc; 4516 struct sctp_nets *net, *nnet; 4517 struct sctp_laddr *laddr, *naddr; 4518 struct sctp_tmit_chunk *chk, *nchk; 4519 struct sctp_asconf_addr *aparam, *naparam; 4520 struct sctp_asconf_ack *aack, *naack; 4521 struct sctp_stream_reset_list *strrst, *nstrrst; 4522 struct sctp_queued_to_read *sq, *nsq; 4523 struct sctp_stream_queue_pending *sp, *nsp; 4524 sctp_sharedkey_t *shared_key, *nshared_key; 4525 struct socket *so; 4526 4527 /* first, lets purge the entry from the hash table. */ 4528 4529 #ifdef SCTP_LOG_CLOSING 4530 sctp_log_closing(inp, stcb, 6); 4531 #endif 4532 if (stcb->asoc.state == 0) { 4533 #ifdef SCTP_LOG_CLOSING 4534 sctp_log_closing(inp, NULL, 7); 4535 #endif 4536 /* there is no asoc, really TSNH :-0 */ 4537 return (1); 4538 } 4539 /* TEMP CODE */ 4540 if (stcb->freed_from_where == 0) { 4541 /* Only record the first place free happened from */ 4542 stcb->freed_from_where = from_location; 4543 } 4544 /* TEMP CODE */ 4545 4546 asoc = &stcb->asoc; 4547 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4548 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4549 /* nothing around */ 4550 so = NULL; 4551 else 4552 so = inp->sctp_socket; 4553 4554 /* 4555 * We used timer based freeing if a reader or writer is in the way. 4556 * So we first check if we are actually being called from a timer, 4557 * if so we abort early if a reader or writer is still in the way. 4558 */ 4559 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4560 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4561 /* 4562 * is it the timer driving us? if so are the reader/writers 4563 * gone? 4564 */ 4565 if (stcb->asoc.refcnt) { 4566 /* nope, reader or writer in the way */ 4567 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4568 /* no asoc destroyed */ 4569 SCTP_TCB_UNLOCK(stcb); 4570 #ifdef SCTP_LOG_CLOSING 4571 sctp_log_closing(inp, stcb, 8); 4572 #endif 4573 return (0); 4574 } 4575 } 4576 /* now clean up any other timers */ 4577 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4578 asoc->hb_timer.self = NULL; 4579 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4580 asoc->dack_timer.self = NULL; 4581 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4582 /*- 4583 * For stream reset we don't blast this unless 4584 * it is a str-reset timer, it might be the 4585 * free-asoc timer which we DON'T want to 4586 * disturb. 4587 */ 4588 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4589 asoc->strreset_timer.self = NULL; 4590 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4591 asoc->asconf_timer.self = NULL; 4592 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4593 asoc->autoclose_timer.self = NULL; 4594 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4595 asoc->shut_guard_timer.self = NULL; 4596 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4597 asoc->delayed_event_timer.self = NULL; 4598 /* Mobility adaptation */ 4599 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4600 asoc->delete_prim_timer.self = NULL; 4601 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4602 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4603 net->fr_timer.self = NULL; 4604 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4605 net->rxt_timer.self = NULL; 4606 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4607 net->pmtu_timer.self = NULL; 4608 } 4609 /* Now the read queue needs to be cleaned up (only once) */ 4610 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4611 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4612 SCTP_INP_READ_LOCK(inp); 4613 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4614 if (sq->stcb == stcb) { 4615 sq->do_not_ref_stcb = 1; 4616 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4617 /* 4618 * If there is no end, there never will be 4619 * now. 4620 */ 4621 if (sq->end_added == 0) { 4622 /* Held for PD-API clear that. */ 4623 sq->pdapi_aborted = 1; 4624 sq->held_length = 0; 4625 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4626 /* 4627 * Need to add a PD-API 4628 * aborted indication. 4629 * Setting the control_pdapi 4630 * assures that it will be 4631 * added right after this 4632 * msg. 4633 */ 4634 uint32_t strseq; 4635 4636 stcb->asoc.control_pdapi = sq; 4637 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4638 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4639 stcb, 4640 SCTP_PARTIAL_DELIVERY_ABORTED, 4641 (void *)&strseq, 4642 SCTP_SO_LOCKED); 4643 stcb->asoc.control_pdapi = NULL; 4644 } 4645 } 4646 /* Add an end to wake them */ 4647 sq->end_added = 1; 4648 } 4649 } 4650 SCTP_INP_READ_UNLOCK(inp); 4651 if (stcb->block_entry) { 4652 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4653 stcb->block_entry->error = ECONNRESET; 4654 stcb->block_entry = NULL; 4655 } 4656 } 4657 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4658 /* 4659 * Someone holds a reference OR the socket is unaccepted 4660 * yet. 4661 */ 4662 if ((stcb->asoc.refcnt) || 4663 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4664 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4665 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4666 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4667 } 4668 SCTP_TCB_UNLOCK(stcb); 4669 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4670 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4671 /* nothing around */ 4672 so = NULL; 4673 if (so) { 4674 /* Wake any reader/writers */ 4675 sctp_sorwakeup(inp, so); 4676 sctp_sowwakeup(inp, so); 4677 } 4678 #ifdef SCTP_LOG_CLOSING 4679 sctp_log_closing(inp, stcb, 9); 4680 #endif 4681 /* no asoc destroyed */ 4682 return (0); 4683 } 4684 #ifdef SCTP_LOG_CLOSING 4685 sctp_log_closing(inp, stcb, 10); 4686 #endif 4687 /* 4688 * When I reach here, no others want to kill the assoc yet.. and I 4689 * own the lock. Now its possible an abort comes in when I do the 4690 * lock exchange below to grab all the locks to do the final take 4691 * out. to prevent this we increment the count, which will start a 4692 * timer and blow out above thus assuring us that we hold exclusive 4693 * killing of the asoc. Note that after getting back the TCB lock we 4694 * will go ahead and increment the counter back up and stop any 4695 * timer a passing stranger may have started :-S 4696 */ 4697 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4698 atomic_add_int(&stcb->asoc.refcnt, 1); 4699 4700 SCTP_TCB_UNLOCK(stcb); 4701 SCTP_INP_INFO_WLOCK(); 4702 SCTP_INP_WLOCK(inp); 4703 SCTP_TCB_LOCK(stcb); 4704 } 4705 /* Double check the GONE flag */ 4706 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4707 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4708 /* nothing around */ 4709 so = NULL; 4710 4711 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4712 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4713 /* 4714 * For TCP type we need special handling when we are 4715 * connected. We also include the peel'ed off ones to. 4716 */ 4717 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4718 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4719 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4720 if (so) { 4721 SOCK_LOCK(so); 4722 if (so->so_rcv.sb_cc == 0) { 4723 so->so_state &= ~(SS_ISCONNECTING | 4724 SS_ISDISCONNECTING | 4725 SS_ISCONFIRMING | 4726 SS_ISCONNECTED); 4727 } 4728 socantrcvmore_locked(so); 4729 sctp_sowwakeup(inp, so); 4730 sctp_sorwakeup(inp, so); 4731 SCTP_SOWAKEUP(so); 4732 } 4733 } 4734 } 4735 /* 4736 * Make it invalid too, that way if its about to run it will abort 4737 * and return. 4738 */ 4739 /* re-increment the lock */ 4740 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4741 atomic_add_int(&stcb->asoc.refcnt, -1); 4742 } 4743 if (stcb->asoc.refcnt) { 4744 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4745 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4746 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4747 SCTP_INP_INFO_WUNLOCK(); 4748 SCTP_INP_WUNLOCK(inp); 4749 } 4750 SCTP_TCB_UNLOCK(stcb); 4751 return (0); 4752 } 4753 asoc->state = 0; 4754 if (inp->sctp_tcbhash) { 4755 LIST_REMOVE(stcb, sctp_tcbhash); 4756 } 4757 if (stcb->asoc.in_asocid_hash) { 4758 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4759 } 4760 /* Now lets remove it from the list of ALL associations in the EP */ 4761 LIST_REMOVE(stcb, sctp_tcblist); 4762 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4763 SCTP_INP_INCR_REF(inp); 4764 SCTP_INP_WUNLOCK(inp); 4765 } 4766 /* pull from vtag hash */ 4767 LIST_REMOVE(stcb, sctp_asocs); 4768 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4769 inp->sctp_lport, stcb->rport); 4770 4771 /* 4772 * Now restop the timers to be sure this is paranoia at is finest! 4773 */ 4774 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4775 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4776 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4777 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4778 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4779 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4780 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4781 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4782 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4783 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4784 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4785 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4786 } 4787 4788 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4789 /* 4790 * The chunk lists and such SHOULD be empty but we check them just 4791 * in case. 4792 */ 4793 /* anything on the wheel needs to be removed */ 4794 for (i = 0; i < asoc->streamoutcnt; i++) { 4795 struct sctp_stream_out *outs; 4796 4797 outs = &asoc->strmout[i]; 4798 /* now clean up any chunks here */ 4799 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4800 TAILQ_REMOVE(&outs->outqueue, sp, next); 4801 if (sp->data) { 4802 if (so) { 4803 /* Still an open socket - report */ 4804 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4805 SCTP_NOTIFY_DATAGRAM_UNSENT, 4806 (void *)sp, SCTP_SO_LOCKED); 4807 } 4808 if (sp->data) { 4809 sctp_m_freem(sp->data); 4810 sp->data = NULL; 4811 sp->tail_mbuf = NULL; 4812 } 4813 } 4814 if (sp->net) { 4815 sctp_free_remote_addr(sp->net); 4816 sp->net = NULL; 4817 } 4818 sctp_free_spbufspace(stcb, asoc, sp); 4819 if (sp->holds_key_ref) 4820 sctp_auth_key_release(stcb, sp->auth_keyid); 4821 /* Free the zone stuff */ 4822 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 4823 SCTP_DECR_STRMOQ_COUNT(); 4824 /* sa_ignore FREED_MEMORY */ 4825 } 4826 } 4827 /* sa_ignore FREED_MEMORY */ 4828 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4829 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4830 SCTP_FREE(strrst, SCTP_M_STRESET); 4831 } 4832 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4833 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4834 if (sq->data) { 4835 sctp_m_freem(sq->data); 4836 sq->data = NULL; 4837 } 4838 sctp_free_remote_addr(sq->whoFrom); 4839 sq->whoFrom = NULL; 4840 sq->stcb = NULL; 4841 /* Free the ctl entry */ 4842 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4843 SCTP_DECR_READQ_COUNT(); 4844 /* sa_ignore FREED_MEMORY */ 4845 } 4846 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4847 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4848 if (chk->data) { 4849 sctp_m_freem(chk->data); 4850 chk->data = NULL; 4851 } 4852 if (chk->holds_key_ref) 4853 sctp_auth_key_release(stcb, chk->auth_keyid); 4854 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4855 SCTP_DECR_CHK_COUNT(); 4856 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4857 asoc->free_chunk_cnt--; 4858 /* sa_ignore FREED_MEMORY */ 4859 } 4860 /* pending send queue SHOULD be empty */ 4861 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4862 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4863 if (chk->data) { 4864 if (so) { 4865 /* Still a socket? */ 4866 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 4867 SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED); 4868 } 4869 if (chk->data) { 4870 sctp_m_freem(chk->data); 4871 chk->data = NULL; 4872 } 4873 } 4874 if (chk->holds_key_ref) 4875 sctp_auth_key_release(stcb, chk->auth_keyid); 4876 if (chk->whoTo) { 4877 sctp_free_remote_addr(chk->whoTo); 4878 chk->whoTo = NULL; 4879 } 4880 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4881 SCTP_DECR_CHK_COUNT(); 4882 /* sa_ignore FREED_MEMORY */ 4883 } 4884 /* sent queue SHOULD be empty */ 4885 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4886 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4887 if (chk->data) { 4888 if (so) { 4889 /* Still a socket? */ 4890 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 4891 SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED); 4892 } 4893 if (chk->data) { 4894 sctp_m_freem(chk->data); 4895 chk->data = NULL; 4896 } 4897 } 4898 if (chk->holds_key_ref) 4899 sctp_auth_key_release(stcb, chk->auth_keyid); 4900 sctp_free_remote_addr(chk->whoTo); 4901 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4902 SCTP_DECR_CHK_COUNT(); 4903 /* sa_ignore FREED_MEMORY */ 4904 } 4905 /* control queue MAY not be empty */ 4906 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 4907 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4908 if (chk->data) { 4909 sctp_m_freem(chk->data); 4910 chk->data = NULL; 4911 } 4912 if (chk->holds_key_ref) 4913 sctp_auth_key_release(stcb, chk->auth_keyid); 4914 sctp_free_remote_addr(chk->whoTo); 4915 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4916 SCTP_DECR_CHK_COUNT(); 4917 /* sa_ignore FREED_MEMORY */ 4918 } 4919 /* ASCONF queue MAY not be empty */ 4920 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 4921 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4922 if (chk->data) { 4923 sctp_m_freem(chk->data); 4924 chk->data = NULL; 4925 } 4926 if (chk->holds_key_ref) 4927 sctp_auth_key_release(stcb, chk->auth_keyid); 4928 sctp_free_remote_addr(chk->whoTo); 4929 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4930 SCTP_DECR_CHK_COUNT(); 4931 /* sa_ignore FREED_MEMORY */ 4932 } 4933 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 4934 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4935 if (chk->data) { 4936 sctp_m_freem(chk->data); 4937 chk->data = NULL; 4938 } 4939 if (chk->holds_key_ref) 4940 sctp_auth_key_release(stcb, chk->auth_keyid); 4941 sctp_free_remote_addr(chk->whoTo); 4942 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4943 SCTP_DECR_CHK_COUNT(); 4944 /* sa_ignore FREED_MEMORY */ 4945 } 4946 4947 if (asoc->mapping_array) { 4948 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4949 asoc->mapping_array = NULL; 4950 } 4951 if (asoc->nr_mapping_array) { 4952 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4953 asoc->nr_mapping_array = NULL; 4954 } 4955 /* the stream outs */ 4956 if (asoc->strmout) { 4957 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4958 asoc->strmout = NULL; 4959 } 4960 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 4961 if (asoc->strmin) { 4962 struct sctp_queued_to_read *ctl, *nctl; 4963 4964 for (i = 0; i < asoc->streamincnt; i++) { 4965 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 4966 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 4967 sctp_free_remote_addr(ctl->whoFrom); 4968 if (ctl->data) { 4969 sctp_m_freem(ctl->data); 4970 ctl->data = NULL; 4971 } 4972 /* 4973 * We don't free the address here since all 4974 * the net's were freed above. 4975 */ 4976 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 4977 SCTP_DECR_READQ_COUNT(); 4978 } 4979 } 4980 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4981 asoc->strmin = NULL; 4982 } 4983 asoc->streamincnt = 0; 4984 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4985 #ifdef INVARIANTS 4986 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 4987 panic("no net's left alloc'ed, or list points to itself"); 4988 } 4989 #endif 4990 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4991 sctp_free_remote_addr(net); 4992 } 4993 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 4994 /* sa_ignore FREED_MEMORY */ 4995 sctp_remove_laddr(laddr); 4996 } 4997 4998 /* pending asconf (address) parameters */ 4999 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5000 /* sa_ignore FREED_MEMORY */ 5001 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5002 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5003 } 5004 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5005 /* sa_ignore FREED_MEMORY */ 5006 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5007 if (aack->data != NULL) { 5008 sctp_m_freem(aack->data); 5009 } 5010 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5011 } 5012 /* clean up auth stuff */ 5013 if (asoc->local_hmacs) 5014 sctp_free_hmaclist(asoc->local_hmacs); 5015 if (asoc->peer_hmacs) 5016 sctp_free_hmaclist(asoc->peer_hmacs); 5017 5018 if (asoc->local_auth_chunks) 5019 sctp_free_chunklist(asoc->local_auth_chunks); 5020 if (asoc->peer_auth_chunks) 5021 sctp_free_chunklist(asoc->peer_auth_chunks); 5022 5023 sctp_free_authinfo(&asoc->authinfo); 5024 5025 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5026 LIST_REMOVE(shared_key, next); 5027 sctp_free_sharedkey(shared_key); 5028 /* sa_ignore FREED_MEMORY */ 5029 } 5030 5031 /* Insert new items here :> */ 5032 5033 /* Get rid of LOCK */ 5034 SCTP_TCB_LOCK_DESTROY(stcb); 5035 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5036 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5037 SCTP_INP_INFO_WUNLOCK(); 5038 SCTP_INP_RLOCK(inp); 5039 } 5040 #ifdef SCTP_TRACK_FREED_ASOCS 5041 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5042 /* now clean up the tasoc itself */ 5043 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5044 SCTP_DECR_ASOC_COUNT(); 5045 } else { 5046 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5047 } 5048 #else 5049 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5050 SCTP_DECR_ASOC_COUNT(); 5051 #endif 5052 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5053 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5054 /* 5055 * If its NOT the inp_free calling us AND sctp_close 5056 * as been called, we call back... 5057 */ 5058 SCTP_INP_RUNLOCK(inp); 5059 /* 5060 * This will start the kill timer (if we are the 5061 * last one) since we hold an increment yet. But 5062 * this is the only safe way to do this since 5063 * otherwise if the socket closes at the same time 5064 * we are here we might collide in the cleanup. 5065 */ 5066 sctp_inpcb_free(inp, 5067 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5068 SCTP_CALLED_DIRECTLY_NOCMPSET); 5069 SCTP_INP_DECR_REF(inp); 5070 goto out_of; 5071 } else { 5072 /* The socket is still open. */ 5073 SCTP_INP_DECR_REF(inp); 5074 } 5075 } 5076 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5077 SCTP_INP_RUNLOCK(inp); 5078 } 5079 out_of: 5080 /* destroyed the asoc */ 5081 #ifdef SCTP_LOG_CLOSING 5082 sctp_log_closing(inp, NULL, 11); 5083 #endif 5084 return (1); 5085 } 5086 5087 5088 5089 /* 5090 * determine if a destination is "reachable" based upon the addresses bound 5091 * to the current endpoint (e.g. only v4 or v6 currently bound) 5092 */ 5093 /* 5094 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5095 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5096 * types bound as its endpoint 5097 */ 5098 int 5099 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5100 { 5101 struct sctp_inpcb *inp; 5102 int answer; 5103 5104 /* 5105 * No locks here, the TCB, in all cases is already locked and an 5106 * assoc is up. There is either a INP lock by the caller applied (in 5107 * asconf case when deleting an address) or NOT in the HB case, 5108 * however if HB then the INP increment is up and the INP will not 5109 * be removed (on top of the fact that we have a TCB lock). So we 5110 * only want to read the sctp_flags, which is either bound-all or 5111 * not.. no protection needed since once an assoc is up you can't be 5112 * changing your binding. 5113 */ 5114 inp = stcb->sctp_ep; 5115 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5116 /* if bound all, destination is not restricted */ 5117 /* 5118 * RRS: Question during lock work: Is this correct? If you 5119 * are bound-all you still might need to obey the V4--V6 5120 * flags??? IMO this bound-all stuff needs to be removed! 5121 */ 5122 return (1); 5123 } 5124 /* NOTE: all "scope" checks are done when local addresses are added */ 5125 if (destaddr->sa_family == AF_INET6) { 5126 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5127 } else if (destaddr->sa_family == AF_INET) { 5128 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5129 } else { 5130 /* invalid family, so it's unreachable */ 5131 answer = 0; 5132 } 5133 return (answer); 5134 } 5135 5136 /* 5137 * update the inp_vflags on an endpoint 5138 */ 5139 static void 5140 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5141 { 5142 struct sctp_laddr *laddr; 5143 5144 /* first clear the flag */ 5145 inp->ip_inp.inp.inp_vflag = 0; 5146 /* set the flag based on addresses on the ep list */ 5147 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5148 if (laddr->ifa == NULL) { 5149 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5150 __FUNCTION__); 5151 continue; 5152 } 5153 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5154 continue; 5155 } 5156 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 5157 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5158 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 5159 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5160 } 5161 } 5162 } 5163 5164 /* 5165 * Add the address to the endpoint local address list There is nothing to be 5166 * done if we are bound to all addresses 5167 */ 5168 void 5169 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5170 { 5171 struct sctp_laddr *laddr; 5172 int fnd, error = 0; 5173 5174 fnd = 0; 5175 5176 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5177 /* You are already bound to all. You have it already */ 5178 return; 5179 } 5180 if (ifa->address.sa.sa_family == AF_INET6) { 5181 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5182 /* Can't bind a non-useable addr. */ 5183 return; 5184 } 5185 } 5186 /* first, is it already present? */ 5187 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5188 if (laddr->ifa == ifa) { 5189 fnd = 1; 5190 break; 5191 } 5192 } 5193 5194 if (fnd == 0) { 5195 /* Not in the ep list */ 5196 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5197 if (error != 0) 5198 return; 5199 inp->laddr_count++; 5200 /* update inp_vflag flags */ 5201 if (ifa->address.sa.sa_family == AF_INET6) { 5202 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5203 } else if (ifa->address.sa.sa_family == AF_INET) { 5204 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5205 } 5206 } 5207 return; 5208 } 5209 5210 5211 /* 5212 * select a new (hopefully reachable) destination net (should only be used 5213 * when we deleted an ep addr that is the only usable source address to reach 5214 * the destination net) 5215 */ 5216 static void 5217 sctp_select_primary_destination(struct sctp_tcb *stcb) 5218 { 5219 struct sctp_nets *net; 5220 5221 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5222 /* for now, we'll just pick the first reachable one we find */ 5223 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5224 continue; 5225 if (sctp_destination_is_reachable(stcb, 5226 (struct sockaddr *)&net->ro._l_addr)) { 5227 /* found a reachable destination */ 5228 stcb->asoc.primary_destination = net; 5229 } 5230 } 5231 /* I can't there from here! ...we're gonna die shortly... */ 5232 } 5233 5234 5235 /* 5236 * Delete the address from the endpoint local address list There is nothing 5237 * to be done if we are bound to all addresses 5238 */ 5239 void 5240 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5241 { 5242 struct sctp_laddr *laddr; 5243 int fnd; 5244 5245 fnd = 0; 5246 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5247 /* You are already bound to all. You have it already */ 5248 return; 5249 } 5250 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5251 if (laddr->ifa == ifa) { 5252 fnd = 1; 5253 break; 5254 } 5255 } 5256 if (fnd && (inp->laddr_count < 2)) { 5257 /* can't delete unless there are at LEAST 2 addresses */ 5258 return; 5259 } 5260 if (fnd) { 5261 /* 5262 * clean up any use of this address go through our 5263 * associations and clear any last_used_address that match 5264 * this one for each assoc, see if a new primary_destination 5265 * is needed 5266 */ 5267 struct sctp_tcb *stcb; 5268 5269 /* clean up "next_addr_touse" */ 5270 if (inp->next_addr_touse == laddr) 5271 /* delete this address */ 5272 inp->next_addr_touse = NULL; 5273 5274 /* clean up "last_used_address" */ 5275 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5276 struct sctp_nets *net; 5277 5278 SCTP_TCB_LOCK(stcb); 5279 if (stcb->asoc.last_used_address == laddr) 5280 /* delete this address */ 5281 stcb->asoc.last_used_address = NULL; 5282 /* 5283 * Now spin through all the nets and purge any ref 5284 * to laddr 5285 */ 5286 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5287 if (net->ro._s_addr && 5288 (net->ro._s_addr->ifa == laddr->ifa)) { 5289 /* Yep, purge src address selected */ 5290 sctp_rtentry_t *rt; 5291 5292 /* delete this address if cached */ 5293 rt = net->ro.ro_rt; 5294 if (rt != NULL) { 5295 RTFREE(rt); 5296 net->ro.ro_rt = NULL; 5297 } 5298 sctp_free_ifa(net->ro._s_addr); 5299 net->ro._s_addr = NULL; 5300 net->src_addr_selected = 0; 5301 } 5302 } 5303 SCTP_TCB_UNLOCK(stcb); 5304 } /* for each tcb */ 5305 /* remove it from the ep list */ 5306 sctp_remove_laddr(laddr); 5307 inp->laddr_count--; 5308 /* update inp_vflag flags */ 5309 sctp_update_ep_vflag(inp); 5310 } 5311 return; 5312 } 5313 5314 /* 5315 * Add the address to the TCB local address restricted list. 5316 * This is a "pending" address list (eg. addresses waiting for an 5317 * ASCONF-ACK response) and cannot be used as a valid source address. 5318 */ 5319 void 5320 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5321 { 5322 struct sctp_inpcb *inp; 5323 struct sctp_laddr *laddr; 5324 struct sctpladdr *list; 5325 5326 /* 5327 * Assumes TCB is locked.. and possibly the INP. May need to 5328 * confirm/fix that if we need it and is not the case. 5329 */ 5330 list = &stcb->asoc.sctp_restricted_addrs; 5331 5332 inp = stcb->sctp_ep; 5333 if (ifa->address.sa.sa_family == AF_INET6) { 5334 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5335 /* Can't bind a non-existent addr. */ 5336 return; 5337 } 5338 } 5339 /* does the address already exist? */ 5340 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5341 if (laddr->ifa == ifa) { 5342 return; 5343 } 5344 } 5345 5346 /* add to the list */ 5347 (void)sctp_insert_laddr(list, ifa, 0); 5348 return; 5349 } 5350 5351 /* 5352 * insert an laddr entry with the given ifa for the desired list 5353 */ 5354 int 5355 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5356 { 5357 struct sctp_laddr *laddr; 5358 5359 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5360 if (laddr == NULL) { 5361 /* out of memory? */ 5362 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5363 return (EINVAL); 5364 } 5365 SCTP_INCR_LADDR_COUNT(); 5366 bzero(laddr, sizeof(*laddr)); 5367 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5368 laddr->ifa = ifa; 5369 laddr->action = act; 5370 atomic_add_int(&ifa->refcount, 1); 5371 /* insert it */ 5372 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5373 5374 return (0); 5375 } 5376 5377 /* 5378 * Remove an laddr entry from the local address list (on an assoc) 5379 */ 5380 void 5381 sctp_remove_laddr(struct sctp_laddr *laddr) 5382 { 5383 5384 /* remove from the list */ 5385 LIST_REMOVE(laddr, sctp_nxt_addr); 5386 sctp_free_ifa(laddr->ifa); 5387 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5388 SCTP_DECR_LADDR_COUNT(); 5389 } 5390 5391 /* 5392 * Remove a local address from the TCB local address restricted list 5393 */ 5394 void 5395 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5396 { 5397 struct sctp_inpcb *inp; 5398 struct sctp_laddr *laddr; 5399 5400 /* 5401 * This is called by asconf work. It is assumed that a) The TCB is 5402 * locked and b) The INP is locked. This is true in as much as I can 5403 * trace through the entry asconf code where I did these locks. 5404 * Again, the ASCONF code is a bit different in that it does lock 5405 * the INP during its work often times. This must be since we don't 5406 * want other proc's looking up things while what they are looking 5407 * up is changing :-D 5408 */ 5409 5410 inp = stcb->sctp_ep; 5411 /* if subset bound and don't allow ASCONF's, can't delete last */ 5412 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5413 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5414 if (stcb->sctp_ep->laddr_count < 2) { 5415 /* can't delete last address */ 5416 return; 5417 } 5418 } 5419 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5420 /* remove the address if it exists */ 5421 if (laddr->ifa == NULL) 5422 continue; 5423 if (laddr->ifa == ifa) { 5424 sctp_remove_laddr(laddr); 5425 return; 5426 } 5427 } 5428 5429 /* address not found! */ 5430 return; 5431 } 5432 5433 /* 5434 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5435 */ 5436 /* sysctl */ 5437 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5438 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5439 5440 void 5441 sctp_pcb_init() 5442 { 5443 /* 5444 * SCTP initialization for the PCB structures should be called by 5445 * the sctp_init() funciton. 5446 */ 5447 int i; 5448 struct timeval tv; 5449 5450 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5451 /* error I was called twice */ 5452 return; 5453 } 5454 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5455 5456 #if defined(SCTP_LOCAL_TRACE_BUF) 5457 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5458 #endif 5459 (void)SCTP_GETTIME_TIMEVAL(&tv); 5460 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5461 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5462 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5463 #else 5464 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5465 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5466 #endif 5467 /* init the empty list of (All) Endpoints */ 5468 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5469 5470 5471 /* init the hash table of endpoints */ 5472 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5473 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5474 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5475 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5476 &SCTP_BASE_INFO(hashasocmark)); 5477 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5478 &SCTP_BASE_INFO(hashmark)); 5479 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5480 &SCTP_BASE_INFO(hashtcpmark)); 5481 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5482 5483 5484 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5485 &SCTP_BASE_INFO(hashvrfmark)); 5486 5487 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5488 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5489 /* init the zones */ 5490 /* 5491 * FIX ME: Should check for NULL returns, but if it does fail we are 5492 * doomed to panic anyways... add later maybe. 5493 */ 5494 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5495 sizeof(struct sctp_inpcb), maxsockets); 5496 5497 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5498 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5499 5500 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5501 sizeof(struct sctp_laddr), 5502 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5503 5504 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5505 sizeof(struct sctp_nets), 5506 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5507 5508 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5509 sizeof(struct sctp_tmit_chunk), 5510 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5511 5512 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5513 sizeof(struct sctp_queued_to_read), 5514 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5515 5516 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5517 sizeof(struct sctp_stream_queue_pending), 5518 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5519 5520 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5521 sizeof(struct sctp_asconf), 5522 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5523 5524 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5525 sizeof(struct sctp_asconf_ack), 5526 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5527 5528 5529 /* Master Lock INIT for info structure */ 5530 SCTP_INP_INFO_LOCK_INIT(); 5531 SCTP_STATLOG_INIT_LOCK(); 5532 5533 SCTP_IPI_COUNT_INIT(); 5534 SCTP_IPI_ADDR_INIT(); 5535 #ifdef SCTP_PACKET_LOGGING 5536 SCTP_IP_PKTLOG_INIT(); 5537 #endif 5538 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5539 5540 SCTP_WQ_ADDR_INIT(); 5541 /* not sure if we need all the counts */ 5542 SCTP_BASE_INFO(ipi_count_ep) = 0; 5543 /* assoc/tcb zone info */ 5544 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5545 /* local addrlist zone info */ 5546 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5547 /* remote addrlist zone info */ 5548 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5549 /* chunk info */ 5550 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5551 5552 /* socket queue zone info */ 5553 SCTP_BASE_INFO(ipi_count_readq) = 0; 5554 5555 /* stream out queue cont */ 5556 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5557 5558 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5559 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5560 5561 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5562 5563 /* Init the TIMEWAIT list */ 5564 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5565 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5566 } 5567 5568 sctp_startup_iterator(); 5569 5570 /* 5571 * INIT the default VRF which for BSD is the only one, other O/S's 5572 * may have more. But initially they must start with one and then 5573 * add the VRF's as addresses are added. 5574 */ 5575 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5576 5577 } 5578 5579 /* 5580 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5581 */ 5582 void 5583 sctp_pcb_finish(void) 5584 { 5585 struct sctp_vrflist *vrf_bucket; 5586 struct sctp_vrf *vrf, *nvrf; 5587 struct sctp_ifn *ifn, *nifn; 5588 struct sctp_ifa *ifa, *nifa; 5589 struct sctpvtaghead *chain; 5590 struct sctp_tagblock *twait_block, *prev_twait_block; 5591 struct sctp_laddr *wi, *nwi; 5592 int i; 5593 5594 /* 5595 * Free BSD the it thread never exits but we do clean up. The only 5596 * way freebsd reaches here if we have VRF's but we still add the 5597 * ifdef to make it compile on old versions. 5598 */ 5599 { 5600 struct sctp_iterator *it, *nit; 5601 5602 SCTP_IPI_ITERATOR_WQ_LOCK(); 5603 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5604 if (it->vn != curvnet) { 5605 continue; 5606 } 5607 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5608 if (it->function_atend != NULL) { 5609 (*it->function_atend) (it->pointer, it->val); 5610 } 5611 SCTP_FREE(it, SCTP_M_ITER); 5612 } 5613 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5614 SCTP_ITERATOR_LOCK(); 5615 if ((sctp_it_ctl.cur_it) && 5616 (sctp_it_ctl.cur_it->vn == curvnet)) { 5617 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5618 } 5619 SCTP_ITERATOR_UNLOCK(); 5620 } 5621 5622 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5623 SCTP_WQ_ADDR_LOCK(); 5624 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5625 LIST_REMOVE(wi, sctp_nxt_addr); 5626 SCTP_DECR_LADDR_COUNT(); 5627 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5628 } 5629 SCTP_WQ_ADDR_UNLOCK(); 5630 5631 /* 5632 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5633 * destroyed first). 5634 */ 5635 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5636 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5637 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5638 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5639 /* free the ifa */ 5640 LIST_REMOVE(ifa, next_bucket); 5641 LIST_REMOVE(ifa, next_ifa); 5642 SCTP_FREE(ifa, SCTP_M_IFA); 5643 } 5644 /* free the ifn */ 5645 LIST_REMOVE(ifn, next_bucket); 5646 LIST_REMOVE(ifn, next_ifn); 5647 SCTP_FREE(ifn, SCTP_M_IFN); 5648 } 5649 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5650 /* free the vrf */ 5651 LIST_REMOVE(vrf, next_vrf); 5652 SCTP_FREE(vrf, SCTP_M_VRF); 5653 } 5654 /* free the vrf hashes */ 5655 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5656 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5657 5658 /* 5659 * free the TIMEWAIT list elements malloc'd in the function 5660 * sctp_add_vtag_to_timewait()... 5661 */ 5662 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5663 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5664 if (!LIST_EMPTY(chain)) { 5665 prev_twait_block = NULL; 5666 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5667 if (prev_twait_block) { 5668 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5669 } 5670 prev_twait_block = twait_block; 5671 } 5672 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5673 } 5674 } 5675 5676 /* free the locks and mutexes */ 5677 #ifdef SCTP_PACKET_LOGGING 5678 SCTP_IP_PKTLOG_DESTROY(); 5679 #endif 5680 SCTP_IPI_ADDR_DESTROY(); 5681 SCTP_STATLOG_DESTROY(); 5682 SCTP_INP_INFO_LOCK_DESTROY(); 5683 5684 SCTP_WQ_ADDR_DESTROY(); 5685 5686 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5687 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5688 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5689 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5690 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5691 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5692 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5693 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5694 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5695 /* Get rid of other stuff to */ 5696 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5697 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5698 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5699 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5700 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5701 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5702 5703 } 5704 5705 5706 int 5707 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5708 int iphlen, int offset, int limit, struct sctphdr *sh, 5709 struct sockaddr *altsa) 5710 { 5711 /* 5712 * grub through the INIT pulling addresses and loading them to the 5713 * nets structure in the asoc. The from address in the mbuf should 5714 * also be loaded (if it is not already). This routine can be called 5715 * with either INIT or INIT-ACK's as long as the m points to the IP 5716 * packet and the offset points to the beginning of the parameters. 5717 */ 5718 struct sctp_inpcb *inp, *l_inp; 5719 struct sctp_nets *net, *nnet, *net_tmp; 5720 struct ip *iph; 5721 struct sctp_paramhdr *phdr, parm_buf; 5722 struct sctp_tcb *stcb_tmp; 5723 uint16_t ptype, plen; 5724 struct sockaddr *sa; 5725 struct sockaddr_storage dest_store; 5726 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 5727 struct sockaddr_in sin; 5728 struct sockaddr_in6 sin6; 5729 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5730 struct sctp_auth_random *p_random = NULL; 5731 uint16_t random_len = 0; 5732 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5733 struct sctp_auth_hmac_algo *hmacs = NULL; 5734 uint16_t hmacs_len = 0; 5735 uint8_t saw_asconf = 0; 5736 uint8_t saw_asconf_ack = 0; 5737 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 5738 struct sctp_auth_chunk_list *chunks = NULL; 5739 uint16_t num_chunks = 0; 5740 sctp_key_t *new_key; 5741 uint32_t keylen; 5742 int got_random = 0, got_hmacs = 0, got_chklist = 0; 5743 5744 /* First get the destination address setup too. */ 5745 memset(&sin, 0, sizeof(sin)); 5746 memset(&sin6, 0, sizeof(sin6)); 5747 5748 sin.sin_family = AF_INET; 5749 sin.sin_len = sizeof(sin); 5750 sin.sin_port = stcb->rport; 5751 5752 sin6.sin6_family = AF_INET6; 5753 sin6.sin6_len = sizeof(struct sockaddr_in6); 5754 sin6.sin6_port = stcb->rport; 5755 if (altsa == NULL) { 5756 iph = mtod(m, struct ip *); 5757 switch (iph->ip_v) { 5758 case IPVERSION: 5759 { 5760 /* its IPv4 */ 5761 struct sockaddr_in *sin_2; 5762 5763 sin_2 = (struct sockaddr_in *)(local_sa); 5764 memset(sin_2, 0, sizeof(sin)); 5765 sin_2->sin_family = AF_INET; 5766 sin_2->sin_len = sizeof(sin); 5767 sin_2->sin_port = sh->dest_port; 5768 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 5769 sin.sin_addr = iph->ip_src; 5770 sa = (struct sockaddr *)&sin; 5771 break; 5772 } 5773 #ifdef INET6 5774 case IPV6_VERSION >> 4: 5775 { 5776 /* its IPv6 */ 5777 struct ip6_hdr *ip6; 5778 struct sockaddr_in6 *sin6_2; 5779 5780 ip6 = mtod(m, struct ip6_hdr *); 5781 sin6_2 = (struct sockaddr_in6 *)(local_sa); 5782 memset(sin6_2, 0, sizeof(sin6)); 5783 sin6_2->sin6_family = AF_INET6; 5784 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 5785 sin6_2->sin6_port = sh->dest_port; 5786 sin6.sin6_addr = ip6->ip6_src; 5787 sa = (struct sockaddr *)&sin6; 5788 break; 5789 } 5790 #endif 5791 default: 5792 return (-1); 5793 break; 5794 } 5795 } else { 5796 /* 5797 * For cookies we use the src address NOT from the packet 5798 * but from the original INIT 5799 */ 5800 sa = altsa; 5801 } 5802 /* Turn off ECN until we get through all params */ 5803 stcb->asoc.ecn_allowed = 0; 5804 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5805 /* mark all addresses that we have currently on the list */ 5806 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 5807 } 5808 /* does the source address already exist? if so skip it */ 5809 l_inp = inp = stcb->sctp_ep; 5810 5811 atomic_add_int(&stcb->asoc.refcnt, 1); 5812 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 5813 atomic_add_int(&stcb->asoc.refcnt, -1); 5814 5815 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 5816 /* we must add the source address */ 5817 /* no scope set here since we have a tcb already. */ 5818 if ((sa->sa_family == AF_INET) && 5819 (stcb->asoc.ipv4_addr_legal)) { 5820 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 5821 return (-1); 5822 } 5823 } else if ((sa->sa_family == AF_INET6) && 5824 (stcb->asoc.ipv6_addr_legal)) { 5825 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 5826 return (-2); 5827 } 5828 } 5829 } else { 5830 if (net_tmp != NULL && stcb_tmp == stcb) { 5831 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 5832 } else if (stcb_tmp != stcb) { 5833 /* It belongs to another association? */ 5834 if (stcb_tmp) 5835 SCTP_TCB_UNLOCK(stcb_tmp); 5836 return (-3); 5837 } 5838 } 5839 if (stcb->asoc.state == 0) { 5840 /* the assoc was freed? */ 5841 return (-4); 5842 } 5843 /* 5844 * peer must explicitly turn this on. This may have been initialized 5845 * to be "on" in order to allow local addr changes while INIT's are 5846 * in flight. 5847 */ 5848 stcb->asoc.peer_supports_asconf = 0; 5849 /* now we must go through each of the params. */ 5850 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 5851 while (phdr) { 5852 ptype = ntohs(phdr->param_type); 5853 plen = ntohs(phdr->param_length); 5854 /* 5855 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 5856 * (int)plen); 5857 */ 5858 if (offset + plen > limit) { 5859 break; 5860 } 5861 if (plen == 0) { 5862 break; 5863 } 5864 if (ptype == SCTP_IPV4_ADDRESS) { 5865 if (stcb->asoc.ipv4_addr_legal) { 5866 struct sctp_ipv4addr_param *p4, p4_buf; 5867 5868 /* ok get the v4 address and check/add */ 5869 phdr = sctp_get_next_param(m, offset, 5870 (struct sctp_paramhdr *)&p4_buf, 5871 sizeof(p4_buf)); 5872 if (plen != sizeof(struct sctp_ipv4addr_param) || 5873 phdr == NULL) { 5874 return (-5); 5875 } 5876 p4 = (struct sctp_ipv4addr_param *)phdr; 5877 sin.sin_addr.s_addr = p4->addr; 5878 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 5879 /* Skip multi-cast addresses */ 5880 goto next_param; 5881 } 5882 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 5883 (sin.sin_addr.s_addr == INADDR_ANY)) { 5884 goto next_param; 5885 } 5886 sa = (struct sockaddr *)&sin; 5887 inp = stcb->sctp_ep; 5888 atomic_add_int(&stcb->asoc.refcnt, 1); 5889 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5890 local_sa, stcb); 5891 atomic_add_int(&stcb->asoc.refcnt, -1); 5892 5893 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 5894 inp == NULL) { 5895 /* we must add the source address */ 5896 /* 5897 * no scope set since we have a tcb 5898 * already 5899 */ 5900 5901 /* 5902 * we must validate the state again 5903 * here 5904 */ 5905 add_it_now: 5906 if (stcb->asoc.state == 0) { 5907 /* the assoc was freed? */ 5908 return (-7); 5909 } 5910 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 5911 return (-8); 5912 } 5913 } else if (stcb_tmp == stcb) { 5914 if (stcb->asoc.state == 0) { 5915 /* the assoc was freed? */ 5916 return (-10); 5917 } 5918 if (net != NULL) { 5919 /* clear flag */ 5920 net->dest_state &= 5921 ~SCTP_ADDR_NOT_IN_ASSOC; 5922 } 5923 } else { 5924 /* 5925 * strange, address is in another 5926 * assoc? straighten out locks. 5927 */ 5928 if (stcb_tmp) { 5929 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 5930 /* 5931 * in setup state we 5932 * abort this guy 5933 */ 5934 sctp_abort_an_association(stcb_tmp->sctp_ep, 5935 stcb_tmp, 1, NULL, 0); 5936 goto add_it_now; 5937 } 5938 SCTP_TCB_UNLOCK(stcb_tmp); 5939 } 5940 if (stcb->asoc.state == 0) { 5941 /* the assoc was freed? */ 5942 return (-12); 5943 } 5944 return (-13); 5945 } 5946 } 5947 } else if (ptype == SCTP_IPV6_ADDRESS) { 5948 if (stcb->asoc.ipv6_addr_legal) { 5949 /* ok get the v6 address and check/add */ 5950 struct sctp_ipv6addr_param *p6, p6_buf; 5951 5952 phdr = sctp_get_next_param(m, offset, 5953 (struct sctp_paramhdr *)&p6_buf, 5954 sizeof(p6_buf)); 5955 if (plen != sizeof(struct sctp_ipv6addr_param) || 5956 phdr == NULL) { 5957 return (-14); 5958 } 5959 p6 = (struct sctp_ipv6addr_param *)phdr; 5960 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 5961 sizeof(p6->addr)); 5962 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 5963 /* Skip multi-cast addresses */ 5964 goto next_param; 5965 } 5966 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 5967 /* 5968 * Link local make no sense without 5969 * scope 5970 */ 5971 goto next_param; 5972 } 5973 sa = (struct sockaddr *)&sin6; 5974 inp = stcb->sctp_ep; 5975 atomic_add_int(&stcb->asoc.refcnt, 1); 5976 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 5977 local_sa, stcb); 5978 atomic_add_int(&stcb->asoc.refcnt, -1); 5979 if (stcb_tmp == NULL && 5980 (inp == stcb->sctp_ep || inp == NULL)) { 5981 /* 5982 * we must validate the state again 5983 * here 5984 */ 5985 add_it_now6: 5986 if (stcb->asoc.state == 0) { 5987 /* the assoc was freed? */ 5988 return (-16); 5989 } 5990 /* 5991 * we must add the address, no scope 5992 * set 5993 */ 5994 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 5995 return (-17); 5996 } 5997 } else if (stcb_tmp == stcb) { 5998 /* 5999 * we must validate the state again 6000 * here 6001 */ 6002 if (stcb->asoc.state == 0) { 6003 /* the assoc was freed? */ 6004 return (-19); 6005 } 6006 if (net != NULL) { 6007 /* clear flag */ 6008 net->dest_state &= 6009 ~SCTP_ADDR_NOT_IN_ASSOC; 6010 } 6011 } else { 6012 /* 6013 * strange, address is in another 6014 * assoc? straighten out locks. 6015 */ 6016 if (stcb_tmp) 6017 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6018 /* 6019 * in setup state we 6020 * abort this guy 6021 */ 6022 sctp_abort_an_association(stcb_tmp->sctp_ep, 6023 stcb_tmp, 1, NULL, 0); 6024 goto add_it_now6; 6025 } 6026 SCTP_TCB_UNLOCK(stcb_tmp); 6027 6028 if (stcb->asoc.state == 0) { 6029 /* the assoc was freed? */ 6030 return (-21); 6031 } 6032 return (-22); 6033 } 6034 } 6035 } else if (ptype == SCTP_ECN_CAPABLE) { 6036 stcb->asoc.ecn_allowed = 1; 6037 } else if (ptype == SCTP_ULP_ADAPTATION) { 6038 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6039 struct sctp_adaptation_layer_indication ai, 6040 *aip; 6041 6042 phdr = sctp_get_next_param(m, offset, 6043 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6044 aip = (struct sctp_adaptation_layer_indication *)phdr; 6045 if (aip) { 6046 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6047 stcb->asoc.adaptation_needed = 1; 6048 } 6049 } 6050 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6051 struct sctp_asconf_addr_param lstore, *fee; 6052 struct sctp_asconf_addrv4_param *fii; 6053 int lptype; 6054 struct sockaddr *lsa = NULL; 6055 6056 stcb->asoc.peer_supports_asconf = 1; 6057 if (plen > sizeof(lstore)) { 6058 return (-23); 6059 } 6060 phdr = sctp_get_next_param(m, offset, 6061 (struct sctp_paramhdr *)&lstore, 6062 min(plen, sizeof(lstore))); 6063 if (phdr == NULL) { 6064 return (-24); 6065 } 6066 fee = (struct sctp_asconf_addr_param *)phdr; 6067 lptype = ntohs(fee->addrp.ph.param_type); 6068 if (lptype == SCTP_IPV4_ADDRESS) { 6069 if (plen != 6070 sizeof(struct sctp_asconf_addrv4_param)) { 6071 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6072 (int)sizeof(struct sctp_asconf_addrv4_param), 6073 plen); 6074 } else { 6075 fii = (struct sctp_asconf_addrv4_param *)fee; 6076 sin.sin_addr.s_addr = fii->addrp.addr; 6077 lsa = (struct sockaddr *)&sin; 6078 } 6079 } else if (lptype == SCTP_IPV6_ADDRESS) { 6080 if (plen != 6081 sizeof(struct sctp_asconf_addr_param)) { 6082 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6083 (int)sizeof(struct sctp_asconf_addr_param), 6084 plen); 6085 } else { 6086 memcpy(sin6.sin6_addr.s6_addr, 6087 fee->addrp.addr, 6088 sizeof(fee->addrp.addr)); 6089 lsa = (struct sockaddr *)&sin6; 6090 } 6091 } 6092 if (lsa) { 6093 (void)sctp_set_primary_addr(stcb, sa, NULL); 6094 } 6095 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6096 stcb->asoc.peer_supports_nat = 1; 6097 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6098 /* Peer supports pr-sctp */ 6099 stcb->asoc.peer_supports_prsctp = 1; 6100 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6101 /* A supported extension chunk */ 6102 struct sctp_supported_chunk_types_param *pr_supported; 6103 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6104 int num_ent, i; 6105 6106 phdr = sctp_get_next_param(m, offset, 6107 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6108 if (phdr == NULL) { 6109 return (-25); 6110 } 6111 stcb->asoc.peer_supports_asconf = 0; 6112 stcb->asoc.peer_supports_prsctp = 0; 6113 stcb->asoc.peer_supports_pktdrop = 0; 6114 stcb->asoc.peer_supports_strreset = 0; 6115 stcb->asoc.peer_supports_nr_sack = 0; 6116 stcb->asoc.peer_supports_auth = 0; 6117 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6118 num_ent = plen - sizeof(struct sctp_paramhdr); 6119 for (i = 0; i < num_ent; i++) { 6120 switch (pr_supported->chunk_types[i]) { 6121 case SCTP_ASCONF: 6122 case SCTP_ASCONF_ACK: 6123 stcb->asoc.peer_supports_asconf = 1; 6124 break; 6125 case SCTP_FORWARD_CUM_TSN: 6126 stcb->asoc.peer_supports_prsctp = 1; 6127 break; 6128 case SCTP_PACKET_DROPPED: 6129 stcb->asoc.peer_supports_pktdrop = 1; 6130 break; 6131 case SCTP_NR_SELECTIVE_ACK: 6132 stcb->asoc.peer_supports_nr_sack = 1; 6133 break; 6134 case SCTP_STREAM_RESET: 6135 stcb->asoc.peer_supports_strreset = 1; 6136 break; 6137 case SCTP_AUTHENTICATION: 6138 stcb->asoc.peer_supports_auth = 1; 6139 break; 6140 default: 6141 /* one I have not learned yet */ 6142 break; 6143 6144 } 6145 } 6146 } else if (ptype == SCTP_ECN_NONCE_SUPPORTED) { 6147 /* Peer supports ECN-nonce */ 6148 stcb->asoc.peer_supports_ecn_nonce = 1; 6149 stcb->asoc.ecn_nonce_allowed = 1; 6150 } else if (ptype == SCTP_RANDOM) { 6151 if (plen > sizeof(random_store)) 6152 break; 6153 if (got_random) { 6154 /* already processed a RANDOM */ 6155 goto next_param; 6156 } 6157 phdr = sctp_get_next_param(m, offset, 6158 (struct sctp_paramhdr *)random_store, 6159 min(sizeof(random_store), plen)); 6160 if (phdr == NULL) 6161 return (-26); 6162 p_random = (struct sctp_auth_random *)phdr; 6163 random_len = plen - sizeof(*p_random); 6164 /* enforce the random length */ 6165 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6166 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6167 return (-27); 6168 } 6169 got_random = 1; 6170 } else if (ptype == SCTP_HMAC_LIST) { 6171 int num_hmacs; 6172 int i; 6173 6174 if (plen > sizeof(hmacs_store)) 6175 break; 6176 if (got_hmacs) { 6177 /* already processed a HMAC list */ 6178 goto next_param; 6179 } 6180 phdr = sctp_get_next_param(m, offset, 6181 (struct sctp_paramhdr *)hmacs_store, 6182 min(plen, sizeof(hmacs_store))); 6183 if (phdr == NULL) 6184 return (-28); 6185 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6186 hmacs_len = plen - sizeof(*hmacs); 6187 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6188 /* validate the hmac list */ 6189 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6190 return (-29); 6191 } 6192 if (stcb->asoc.peer_hmacs != NULL) 6193 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6194 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6195 if (stcb->asoc.peer_hmacs != NULL) { 6196 for (i = 0; i < num_hmacs; i++) { 6197 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6198 ntohs(hmacs->hmac_ids[i])); 6199 } 6200 } 6201 got_hmacs = 1; 6202 } else if (ptype == SCTP_CHUNK_LIST) { 6203 int i; 6204 6205 if (plen > sizeof(chunks_store)) 6206 break; 6207 if (got_chklist) { 6208 /* already processed a Chunks list */ 6209 goto next_param; 6210 } 6211 phdr = sctp_get_next_param(m, offset, 6212 (struct sctp_paramhdr *)chunks_store, 6213 min(plen, sizeof(chunks_store))); 6214 if (phdr == NULL) 6215 return (-30); 6216 chunks = (struct sctp_auth_chunk_list *)phdr; 6217 num_chunks = plen - sizeof(*chunks); 6218 if (stcb->asoc.peer_auth_chunks != NULL) 6219 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6220 else 6221 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6222 for (i = 0; i < num_chunks; i++) { 6223 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6224 stcb->asoc.peer_auth_chunks); 6225 /* record asconf/asconf-ack if listed */ 6226 if (chunks->chunk_types[i] == SCTP_ASCONF) 6227 saw_asconf = 1; 6228 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6229 saw_asconf_ack = 1; 6230 6231 } 6232 got_chklist = 1; 6233 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6234 (ptype == SCTP_STATE_COOKIE) || 6235 (ptype == SCTP_UNRECOG_PARAM) || 6236 (ptype == SCTP_COOKIE_PRESERVE) || 6237 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6238 (ptype == SCTP_ADD_IP_ADDRESS) || 6239 (ptype == SCTP_DEL_IP_ADDRESS) || 6240 (ptype == SCTP_ERROR_CAUSE_IND) || 6241 (ptype == SCTP_SUCCESS_REPORT)) { 6242 /* don't care */ ; 6243 } else { 6244 if ((ptype & 0x8000) == 0x0000) { 6245 /* 6246 * must stop processing the rest of the 6247 * param's. Any report bits were handled 6248 * with the call to 6249 * sctp_arethere_unrecognized_parameters() 6250 * when the INIT or INIT-ACK was first seen. 6251 */ 6252 break; 6253 } 6254 } 6255 6256 next_param: 6257 offset += SCTP_SIZE32(plen); 6258 if (offset >= limit) { 6259 break; 6260 } 6261 phdr = sctp_get_next_param(m, offset, &parm_buf, 6262 sizeof(parm_buf)); 6263 } 6264 /* Now check to see if we need to purge any addresses */ 6265 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6266 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6267 SCTP_ADDR_NOT_IN_ASSOC) { 6268 /* This address has been removed from the asoc */ 6269 /* remove and free it */ 6270 stcb->asoc.numnets--; 6271 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6272 sctp_free_remote_addr(net); 6273 if (net == stcb->asoc.primary_destination) { 6274 stcb->asoc.primary_destination = NULL; 6275 sctp_select_primary_destination(stcb); 6276 } 6277 } 6278 } 6279 /* validate authentication required parameters */ 6280 if (got_random && got_hmacs) { 6281 stcb->asoc.peer_supports_auth = 1; 6282 } else { 6283 stcb->asoc.peer_supports_auth = 0; 6284 } 6285 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6286 /* peer does not support auth but sent a chunks list? */ 6287 return (-31); 6288 } 6289 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6290 !stcb->asoc.peer_supports_auth) { 6291 /* peer supports asconf but not auth? */ 6292 return (-32); 6293 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6294 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6295 return (-33); 6296 } 6297 /* concatenate the full random key */ 6298 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6299 if (chunks != NULL) { 6300 keylen += sizeof(*chunks) + num_chunks; 6301 } 6302 new_key = sctp_alloc_key(keylen); 6303 if (new_key != NULL) { 6304 /* copy in the RANDOM */ 6305 if (p_random != NULL) { 6306 keylen = sizeof(*p_random) + random_len; 6307 bcopy(p_random, new_key->key, keylen); 6308 } 6309 /* append in the AUTH chunks */ 6310 if (chunks != NULL) { 6311 bcopy(chunks, new_key->key + keylen, 6312 sizeof(*chunks) + num_chunks); 6313 keylen += sizeof(*chunks) + num_chunks; 6314 } 6315 /* append in the HMACs */ 6316 if (hmacs != NULL) { 6317 bcopy(hmacs, new_key->key + keylen, 6318 sizeof(*hmacs) + hmacs_len); 6319 } 6320 } else { 6321 /* failed to get memory for the key */ 6322 return (-34); 6323 } 6324 if (stcb->asoc.authinfo.peer_random != NULL) 6325 sctp_free_key(stcb->asoc.authinfo.peer_random); 6326 stcb->asoc.authinfo.peer_random = new_key; 6327 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6328 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6329 6330 return (0); 6331 } 6332 6333 int 6334 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6335 struct sctp_nets *net) 6336 { 6337 /* make sure the requested primary address exists in the assoc */ 6338 if (net == NULL && sa) 6339 net = sctp_findnet(stcb, sa); 6340 6341 if (net == NULL) { 6342 /* didn't find the requested primary address! */ 6343 return (-1); 6344 } else { 6345 /* set the primary address */ 6346 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6347 /* Must be confirmed, so queue to set */ 6348 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6349 return (0); 6350 } 6351 stcb->asoc.primary_destination = net; 6352 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 6353 net = TAILQ_FIRST(&stcb->asoc.nets); 6354 if (net != stcb->asoc.primary_destination) { 6355 /* 6356 * first one on the list is NOT the primary 6357 * sctp_cmpaddr() is much more efficient if the 6358 * primary is the first on the list, make it so. 6359 */ 6360 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6361 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6362 } 6363 return (0); 6364 } 6365 } 6366 6367 int 6368 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6369 { 6370 /* 6371 * This function serves two purposes. It will see if a TAG can be 6372 * re-used and return 1 for yes it is ok and 0 for don't use that 6373 * tag. A secondary function it will do is purge out old tags that 6374 * can be removed. 6375 */ 6376 struct sctpvtaghead *chain; 6377 struct sctp_tagblock *twait_block; 6378 struct sctpasochead *head; 6379 struct sctp_tcb *stcb; 6380 int i; 6381 6382 SCTP_INP_INFO_RLOCK(); 6383 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6384 SCTP_BASE_INFO(hashasocmark))]; 6385 if (head == NULL) { 6386 /* invalid vtag */ 6387 goto skip_vtag_check; 6388 } 6389 LIST_FOREACH(stcb, head, sctp_asocs) { 6390 /* 6391 * We choose not to lock anything here. TCB's can't be 6392 * removed since we have the read lock, so they can't be 6393 * freed on us, same thing for the INP. I may be wrong with 6394 * this assumption, but we will go with it for now :-) 6395 */ 6396 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6397 continue; 6398 } 6399 if (stcb->asoc.my_vtag == tag) { 6400 /* candidate */ 6401 if (stcb->rport != rport) { 6402 continue; 6403 } 6404 if (stcb->sctp_ep->sctp_lport != lport) { 6405 continue; 6406 } 6407 /* Its a used tag set */ 6408 SCTP_INP_INFO_RUNLOCK(); 6409 return (0); 6410 } 6411 } 6412 skip_vtag_check: 6413 6414 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6415 /* Now what about timed wait ? */ 6416 if (!LIST_EMPTY(chain)) { 6417 /* 6418 * Block(s) are present, lets see if we have this tag in the 6419 * list 6420 */ 6421 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6422 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6423 if (twait_block->vtag_block[i].v_tag == 0) { 6424 /* not used */ 6425 continue; 6426 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6427 now->tv_sec) { 6428 /* Audit expires this guy */ 6429 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6430 twait_block->vtag_block[i].v_tag = 0; 6431 twait_block->vtag_block[i].lport = 0; 6432 twait_block->vtag_block[i].rport = 0; 6433 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6434 (twait_block->vtag_block[i].lport == lport) && 6435 (twait_block->vtag_block[i].rport == rport)) { 6436 /* Bad tag, sorry :< */ 6437 SCTP_INP_INFO_RUNLOCK(); 6438 return (0); 6439 } 6440 } 6441 } 6442 } 6443 SCTP_INP_INFO_RUNLOCK(); 6444 return (1); 6445 } 6446 6447 6448 static sctp_assoc_t reneged_asoc_ids[256]; 6449 static uint8_t reneged_at = 0; 6450 6451 6452 static void 6453 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6454 { 6455 /* 6456 * We must hunt this association for MBUF's past the cumack (i.e. 6457 * out of order data that we can renege on). 6458 */ 6459 struct sctp_association *asoc; 6460 struct sctp_tmit_chunk *chk, *nchk; 6461 uint32_t cumulative_tsn_p1; 6462 struct sctp_queued_to_read *ctl, *nctl; 6463 int cnt, strmat; 6464 uint32_t gap, i; 6465 int fnd = 0; 6466 6467 /* We look for anything larger than the cum-ack + 1 */ 6468 6469 asoc = &stcb->asoc; 6470 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6471 /* none we can reneg on. */ 6472 return; 6473 } 6474 SCTP_STAT_INCR(sctps_protocol_drains_done); 6475 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6476 cnt = 0; 6477 /* First look in the re-assembly queue */ 6478 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6479 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6480 /* Yep it is above cum-ack */ 6481 cnt++; 6482 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6483 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6484 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6485 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6486 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6487 if (chk->data) { 6488 sctp_m_freem(chk->data); 6489 chk->data = NULL; 6490 } 6491 sctp_free_a_chunk(stcb, chk); 6492 } 6493 } 6494 /* Ok that was fun, now we will drain all the inbound streams? */ 6495 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6496 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6497 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6498 /* Yep it is above cum-ack */ 6499 cnt++; 6500 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6501 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6502 sctp_ucount_decr(asoc->cnt_on_all_streams); 6503 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6504 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6505 if (ctl->data) { 6506 sctp_m_freem(ctl->data); 6507 ctl->data = NULL; 6508 } 6509 sctp_free_remote_addr(ctl->whoFrom); 6510 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6511 SCTP_DECR_READQ_COUNT(); 6512 } 6513 } 6514 } 6515 if (cnt) { 6516 /* We must back down to see what the new highest is */ 6517 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6518 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6519 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6520 asoc->highest_tsn_inside_map = i; 6521 fnd = 1; 6522 break; 6523 } 6524 } 6525 if (!fnd) { 6526 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6527 } 6528 /* 6529 * Question, should we go through the delivery queue? The 6530 * only reason things are on here is the app not reading OR 6531 * a p-d-api up. An attacker COULD send enough in to 6532 * initiate the PD-API and then send a bunch of stuff to 6533 * other streams... these would wind up on the delivery 6534 * queue.. and then we would not get to them. But in order 6535 * to do this I then have to back-track and un-deliver 6536 * sequence numbers in streams.. el-yucko. I think for now 6537 * we will NOT look at the delivery queue and leave it to be 6538 * something to consider later. An alternative would be to 6539 * abort the P-D-API with a notification and then deliver 6540 * the data.... Or another method might be to keep track of 6541 * how many times the situation occurs and if we see a 6542 * possible attack underway just abort the association. 6543 */ 6544 #ifdef SCTP_DEBUG 6545 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6546 #endif 6547 /* 6548 * Now do we need to find a new 6549 * asoc->highest_tsn_inside_map? 6550 */ 6551 asoc->last_revoke_count = cnt; 6552 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6553 /* sa_ignore NO_NULL_CHK */ 6554 sctp_send_sack(stcb); 6555 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6556 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 6557 reneged_at++; 6558 } 6559 /* 6560 * Another issue, in un-setting the TSN's in the mapping array we 6561 * DID NOT adjust the highest_tsn marker. This will cause one of 6562 * two things to occur. It may cause us to do extra work in checking 6563 * for our mapping array movement. More importantly it may cause us 6564 * to SACK every datagram. This may not be a bad thing though since 6565 * we will recover once we get our cum-ack above and all this stuff 6566 * we dumped recovered. 6567 */ 6568 } 6569 6570 void 6571 sctp_drain() 6572 { 6573 /* 6574 * We must walk the PCB lists for ALL associations here. The system 6575 * is LOW on MBUF's and needs help. This is where reneging will 6576 * occur. We really hope this does NOT happen! 6577 */ 6578 VNET_ITERATOR_DECL(vnet_iter); 6579 VNET_LIST_RLOCK_NOSLEEP(); 6580 VNET_FOREACH(vnet_iter) { 6581 CURVNET_SET(vnet_iter); 6582 struct sctp_inpcb *inp; 6583 struct sctp_tcb *stcb; 6584 6585 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6586 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6587 #ifdef VIMAGE 6588 continue; 6589 #else 6590 return; 6591 #endif 6592 } 6593 SCTP_INP_INFO_RLOCK(); 6594 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6595 /* For each endpoint */ 6596 SCTP_INP_RLOCK(inp); 6597 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6598 /* For each association */ 6599 SCTP_TCB_LOCK(stcb); 6600 sctp_drain_mbufs(inp, stcb); 6601 SCTP_TCB_UNLOCK(stcb); 6602 } 6603 SCTP_INP_RUNLOCK(inp); 6604 } 6605 SCTP_INP_INFO_RUNLOCK(); 6606 CURVNET_RESTORE(); 6607 } 6608 VNET_LIST_RUNLOCK_NOSLEEP(); 6609 } 6610 6611 /* 6612 * start a new iterator 6613 * iterates through all endpoints and associations based on the pcb_state 6614 * flags and asoc_state. "af" (mandatory) is executed for all matching 6615 * assocs and "ef" (optional) is executed when the iterator completes. 6616 * "inpf" (optional) is executed for each new endpoint as it is being 6617 * iterated through. inpe (optional) is called when the inp completes 6618 * its way through all the stcbs. 6619 */ 6620 int 6621 sctp_initiate_iterator(inp_func inpf, 6622 asoc_func af, 6623 inp_func inpe, 6624 uint32_t pcb_state, 6625 uint32_t pcb_features, 6626 uint32_t asoc_state, 6627 void *argp, 6628 uint32_t argi, 6629 end_func ef, 6630 struct sctp_inpcb *s_inp, 6631 uint8_t chunk_output_off) 6632 { 6633 struct sctp_iterator *it = NULL; 6634 6635 if (af == NULL) { 6636 return (-1); 6637 } 6638 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6639 SCTP_M_ITER); 6640 if (it == NULL) { 6641 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6642 return (ENOMEM); 6643 } 6644 memset(it, 0, sizeof(*it)); 6645 it->function_assoc = af; 6646 it->function_inp = inpf; 6647 if (inpf) 6648 it->done_current_ep = 0; 6649 else 6650 it->done_current_ep = 1; 6651 it->function_atend = ef; 6652 it->pointer = argp; 6653 it->val = argi; 6654 it->pcb_flags = pcb_state; 6655 it->pcb_features = pcb_features; 6656 it->asoc_state = asoc_state; 6657 it->function_inp_end = inpe; 6658 it->no_chunk_output = chunk_output_off; 6659 it->vn = curvnet; 6660 if (s_inp) { 6661 /* Assume lock is held here */ 6662 it->inp = s_inp; 6663 SCTP_INP_INCR_REF(it->inp); 6664 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6665 } else { 6666 SCTP_INP_INFO_RLOCK(); 6667 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6668 if (it->inp) { 6669 SCTP_INP_INCR_REF(it->inp); 6670 } 6671 SCTP_INP_INFO_RUNLOCK(); 6672 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6673 6674 } 6675 SCTP_IPI_ITERATOR_WQ_LOCK(); 6676 6677 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6678 if (sctp_it_ctl.iterator_running == 0) { 6679 sctp_wakeup_iterator(); 6680 } 6681 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6682 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6683 return (0); 6684 } 6685