1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2011, by Randall Stewart, rrs@lakerest.net and 4 * Michael Tuexen, tuexen@fh-muenster.de 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * 10 * a) Redistributions of source code must retain the above copyright notice, 11 * this list of conditions and the following disclaimer. 12 * 13 * b) Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the distribution. 16 * 17 * c) Neither the name of Cisco Systems, Inc. nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 31 * THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include <netinet/sctp_os.h> 40 #include <sys/proc.h> 41 #include <netinet/sctp_var.h> 42 #include <netinet/sctp_sysctl.h> 43 #include <netinet/sctp_pcb.h> 44 #include <netinet/sctputil.h> 45 #include <netinet/sctp.h> 46 #include <netinet/sctp_header.h> 47 #include <netinet/sctp_asconf.h> 48 #include <netinet/sctp_output.h> 49 #include <netinet/sctp_timer.h> 50 #include <netinet/sctp_bsd_addr.h> 51 #include <netinet/sctp_dtrace_define.h> 52 #include <netinet/udp.h> 53 #include <sys/sched.h> 54 #include <sys/smp.h> 55 #include <sys/unistd.h> 56 57 58 VNET_DEFINE(struct sctp_base_info, system_base_info); 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return 0; 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return 0; 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 79 #endif 80 81 void 82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 83 { 84 /* 85 * We really don't need to lock this, but I will just because it 86 * does not hurt. 87 */ 88 SCTP_INP_INFO_RLOCK(); 89 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 90 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 91 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 92 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 93 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 94 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 95 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 96 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 97 98 SCTP_INP_INFO_RUNLOCK(); 99 } 100 101 /* 102 * Addresses are added to VRF's (Virtual Router's). For BSD we 103 * have only the default VRF 0. We maintain a hash list of 104 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 105 * these has a list of addresses. When we add a new address 106 * to a VRF we lookup the ifn/ifn_index, if the ifn does 107 * not exist we create it and add it to the list of IFN's 108 * within the VRF. Once we have the sctp_ifn, we add the 109 * address to the list. So we look something like: 110 * 111 * hash-vrf-table 112 * vrf-> ifn-> ifn -> ifn 113 * vrf | 114 * ... +--ifa-> ifa -> ifa 115 * vrf 116 * 117 * We keep these separate lists since the SCTP subsystem will 118 * point to these from its source address selection nets structure. 119 * When an address is deleted it does not happen right away on 120 * the SCTP side, it gets scheduled. What we do when a 121 * delete happens is immediately remove the address from 122 * the master list and decrement the refcount. As our 123 * addip iterator works through and frees the src address 124 * selection pointing to the sctp_ifa, eventually the refcount 125 * will reach 0 and we will delete it. Note that it is assumed 126 * that any locking on system level ifn/ifa is done at the 127 * caller of these functions and these routines will only 128 * lock the SCTP structures as they add or delete things. 129 * 130 * Other notes on VRF concepts. 131 * - An endpoint can be in multiple VRF's 132 * - An association lives within a VRF and only one VRF. 133 * - Any incoming packet we can deduce the VRF for by 134 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 135 * - Any downward send call or connect call must supply the 136 * VRF via ancillary data or via some sort of set default 137 * VRF socket option call (again for BSD no brainer since 138 * the VRF is always 0). 139 * - An endpoint may add multiple VRF's to it. 140 * - Listening sockets can accept associations in any 141 * of the VRF's they are in but the assoc will end up 142 * in only one VRF (gotten from the packet or connect/send). 143 * 144 */ 145 146 struct sctp_vrf * 147 sctp_allocate_vrf(int vrf_id) 148 { 149 struct sctp_vrf *vrf = NULL; 150 struct sctp_vrflist *bucket; 151 152 /* First allocate the VRF structure */ 153 vrf = sctp_find_vrf(vrf_id); 154 if (vrf) { 155 /* Already allocated */ 156 return (vrf); 157 } 158 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 159 SCTP_M_VRF); 160 if (vrf == NULL) { 161 /* No memory */ 162 #ifdef INVARIANTS 163 panic("No memory for VRF:%d", vrf_id); 164 #endif 165 return (NULL); 166 } 167 /* setup the VRF */ 168 memset(vrf, 0, sizeof(struct sctp_vrf)); 169 vrf->vrf_id = vrf_id; 170 LIST_INIT(&vrf->ifnlist); 171 vrf->total_ifa_count = 0; 172 vrf->refcount = 0; 173 /* now also setup table ids */ 174 SCTP_INIT_VRF_TABLEID(vrf); 175 /* Init the HASH of addresses */ 176 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 177 &vrf->vrf_addr_hashmark); 178 if (vrf->vrf_addr_hash == NULL) { 179 /* No memory */ 180 #ifdef INVARIANTS 181 panic("No memory for VRF:%d", vrf_id); 182 #endif 183 SCTP_FREE(vrf, SCTP_M_VRF); 184 return (NULL); 185 } 186 /* Add it to the hash table */ 187 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 188 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 189 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 190 return (vrf); 191 } 192 193 194 struct sctp_ifn * 195 sctp_find_ifn(void *ifn, uint32_t ifn_index) 196 { 197 struct sctp_ifn *sctp_ifnp; 198 struct sctp_ifnlist *hash_ifn_head; 199 200 /* 201 * We assume the lock is held for the addresses if that's wrong 202 * problems could occur :-) 203 */ 204 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 205 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 206 if (sctp_ifnp->ifn_index == ifn_index) { 207 return (sctp_ifnp); 208 } 209 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 210 return (sctp_ifnp); 211 } 212 } 213 return (NULL); 214 } 215 216 217 218 struct sctp_vrf * 219 sctp_find_vrf(uint32_t vrf_id) 220 { 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231 } 232 233 void 234 sctp_free_vrf(struct sctp_vrf *vrf) 235 { 236 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 237 if (vrf->vrf_addr_hash) { 238 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 239 vrf->vrf_addr_hash = NULL; 240 } 241 /* We zero'd the count */ 242 LIST_REMOVE(vrf, next_vrf); 243 SCTP_FREE(vrf, SCTP_M_VRF); 244 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 245 } 246 } 247 248 void 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 250 { 251 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 252 /* We zero'd the count */ 253 if (sctp_ifnp->vrf) { 254 sctp_free_vrf(sctp_ifnp->vrf); 255 } 256 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 257 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 258 } 259 } 260 261 void 262 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 263 { 264 struct sctp_ifn *sctp_ifnp; 265 266 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 267 if (sctp_ifnp != NULL) { 268 sctp_ifnp->ifn_mtu = mtu; 269 } 270 } 271 272 273 void 274 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 275 { 276 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 277 /* We zero'd the count */ 278 if (sctp_ifap->ifn_p) { 279 sctp_free_ifn(sctp_ifap->ifn_p); 280 } 281 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 282 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 283 } 284 } 285 286 static void 287 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 288 { 289 struct sctp_ifn *found; 290 291 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 292 if (found == NULL) { 293 /* Not in the list.. sorry */ 294 return; 295 } 296 if (hold_addr_lock == 0) 297 SCTP_IPI_ADDR_WLOCK(); 298 LIST_REMOVE(sctp_ifnp, next_bucket); 299 LIST_REMOVE(sctp_ifnp, next_ifn); 300 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 301 sctp_ifnp->registered_af); 302 if (hold_addr_lock == 0) 303 SCTP_IPI_ADDR_WUNLOCK(); 304 /* Take away the reference, and possibly free it */ 305 sctp_free_ifn(sctp_ifnp); 306 } 307 308 void 309 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 310 const char *if_name, uint32_t ifn_index) 311 { 312 struct sctp_vrf *vrf; 313 struct sctp_ifa *sctp_ifap = NULL; 314 315 SCTP_IPI_ADDR_RLOCK(); 316 vrf = sctp_find_vrf(vrf_id); 317 if (vrf == NULL) { 318 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 319 goto out; 320 321 } 322 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 323 if (sctp_ifap == NULL) { 324 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 325 goto out; 326 } 327 if (sctp_ifap->ifn_p == NULL) { 328 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 329 goto out; 330 } 331 if (if_name) { 332 int len1, len2; 333 334 len1 = strlen(if_name); 335 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 336 if (len1 != len2) { 337 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n", 338 len1, len2); 339 goto out; 340 } 341 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 342 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 343 sctp_ifap->ifn_p->ifn_name, 344 if_name); 345 goto out; 346 } 347 } else { 348 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 349 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 350 sctp_ifap->ifn_p->ifn_index, ifn_index); 351 goto out; 352 } 353 } 354 355 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 356 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 357 out: 358 SCTP_IPI_ADDR_RUNLOCK(); 359 } 360 361 void 362 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 363 const char *if_name, uint32_t ifn_index) 364 { 365 struct sctp_vrf *vrf; 366 struct sctp_ifa *sctp_ifap = NULL; 367 368 SCTP_IPI_ADDR_RLOCK(); 369 vrf = sctp_find_vrf(vrf_id); 370 if (vrf == NULL) { 371 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 372 goto out; 373 374 } 375 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 376 if (sctp_ifap == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 378 goto out; 379 } 380 if (sctp_ifap->ifn_p == NULL) { 381 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 382 goto out; 383 } 384 if (if_name) { 385 int len1, len2; 386 387 len1 = strlen(if_name); 388 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 389 if (len1 != len2) { 390 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n", 391 len1, len2); 392 goto out; 393 } 394 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 395 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 396 sctp_ifap->ifn_p->ifn_name, 397 if_name); 398 goto out; 399 } 400 } else { 401 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 402 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 403 sctp_ifap->ifn_p->ifn_index, ifn_index); 404 goto out; 405 } 406 } 407 408 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 409 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 410 out: 411 SCTP_IPI_ADDR_RUNLOCK(); 412 } 413 414 /*- 415 * Add an ifa to an ifn. 416 * Register the interface as necessary. 417 * NOTE: ADDR write lock MUST be held. 418 */ 419 static void 420 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 421 { 422 int ifa_af; 423 424 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 425 sctp_ifap->ifn_p = sctp_ifnp; 426 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 427 /* update address counts */ 428 sctp_ifnp->ifa_count++; 429 ifa_af = sctp_ifap->address.sa.sa_family; 430 if (ifa_af == AF_INET) 431 sctp_ifnp->num_v4++; 432 else 433 sctp_ifnp->num_v6++; 434 if (sctp_ifnp->ifa_count == 1) { 435 /* register the new interface */ 436 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 437 sctp_ifnp->registered_af = ifa_af; 438 } 439 } 440 441 /*- 442 * Remove an ifa from its ifn. 443 * If no more addresses exist, remove the ifn too. Otherwise, re-register 444 * the interface based on the remaining address families left. 445 * NOTE: ADDR write lock MUST be held. 446 */ 447 static void 448 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 449 { 450 uint32_t ifn_index; 451 452 LIST_REMOVE(sctp_ifap, next_ifa); 453 if (sctp_ifap->ifn_p) { 454 /* update address counts */ 455 sctp_ifap->ifn_p->ifa_count--; 456 if (sctp_ifap->address.sa.sa_family == AF_INET6) 457 sctp_ifap->ifn_p->num_v6--; 458 else if (sctp_ifap->address.sa.sa_family == AF_INET) 459 sctp_ifap->ifn_p->num_v4--; 460 461 ifn_index = sctp_ifap->ifn_p->ifn_index; 462 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 463 /* remove the ifn, possibly freeing it */ 464 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 465 } else { 466 /* re-register address family type, if needed */ 467 if ((sctp_ifap->ifn_p->num_v6 == 0) && 468 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 469 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6); 470 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET); 471 sctp_ifap->ifn_p->registered_af = AF_INET; 472 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 474 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET); 475 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6); 476 sctp_ifap->ifn_p->registered_af = AF_INET6; 477 } 478 /* free the ifn refcount */ 479 sctp_free_ifn(sctp_ifap->ifn_p); 480 } 481 sctp_ifap->ifn_p = NULL; 482 } 483 } 484 485 struct sctp_ifa * 486 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 487 uint32_t ifn_type, const char *if_name, void *ifa, 488 struct sockaddr *addr, uint32_t ifa_flags, 489 int dynamic_add) 490 { 491 struct sctp_vrf *vrf; 492 struct sctp_ifn *sctp_ifnp = NULL; 493 struct sctp_ifa *sctp_ifap = NULL; 494 struct sctp_ifalist *hash_addr_head; 495 struct sctp_ifnlist *hash_ifn_head; 496 uint32_t hash_of_addr; 497 int new_ifn_af = 0; 498 499 #ifdef SCTP_DEBUG 500 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 501 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 502 #endif 503 SCTP_IPI_ADDR_WLOCK(); 504 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 505 if (sctp_ifnp) { 506 vrf = sctp_ifnp->vrf; 507 } else { 508 vrf = sctp_find_vrf(vrf_id); 509 if (vrf == NULL) { 510 vrf = sctp_allocate_vrf(vrf_id); 511 if (vrf == NULL) { 512 SCTP_IPI_ADDR_WUNLOCK(); 513 return (NULL); 514 } 515 } 516 } 517 if (sctp_ifnp == NULL) { 518 /* 519 * build one and add it, can't hold lock until after malloc 520 * done though. 521 */ 522 SCTP_IPI_ADDR_WUNLOCK(); 523 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 524 sizeof(struct sctp_ifn), SCTP_M_IFN); 525 if (sctp_ifnp == NULL) { 526 #ifdef INVARIANTS 527 panic("No memory for IFN"); 528 #endif 529 return (NULL); 530 } 531 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 532 sctp_ifnp->ifn_index = ifn_index; 533 sctp_ifnp->ifn_p = ifn; 534 sctp_ifnp->ifn_type = ifn_type; 535 sctp_ifnp->refcount = 0; 536 sctp_ifnp->vrf = vrf; 537 atomic_add_int(&vrf->refcount, 1); 538 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 539 if (if_name != NULL) { 540 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ); 541 } else { 542 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ)); 543 } 544 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 545 LIST_INIT(&sctp_ifnp->ifalist); 546 SCTP_IPI_ADDR_WLOCK(); 547 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 548 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 549 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 550 new_ifn_af = 1; 551 } 552 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 553 if (sctp_ifap) { 554 /* Hmm, it already exists? */ 555 if ((sctp_ifap->ifn_p) && 556 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 557 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 558 sctp_ifap->ifn_p->ifn_name, ifn_index, 559 sctp_ifap); 560 if (new_ifn_af) { 561 /* Remove the created one that we don't want */ 562 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 563 } 564 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 565 /* easy to solve, just switch back to active */ 566 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 567 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 568 sctp_ifap->ifn_p = sctp_ifnp; 569 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 570 } 571 exit_stage_left: 572 SCTP_IPI_ADDR_WUNLOCK(); 573 return (sctp_ifap); 574 } else { 575 if (sctp_ifap->ifn_p) { 576 /* 577 * The last IFN gets the address, remove the 578 * old one 579 */ 580 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 581 sctp_ifap, sctp_ifap->ifn_p->ifn_name, 582 sctp_ifap->ifn_p->ifn_index, if_name, 583 ifn_index); 584 /* remove the address from the old ifn */ 585 sctp_remove_ifa_from_ifn(sctp_ifap); 586 /* move the address over to the new ifn */ 587 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 588 goto exit_stage_left; 589 } else { 590 /* repair ifnp which was NULL ? */ 591 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 592 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 593 sctp_ifnp, sctp_ifap); 594 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 595 } 596 goto exit_stage_left; 597 } 598 } 599 SCTP_IPI_ADDR_WUNLOCK(); 600 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 601 if (sctp_ifap == NULL) { 602 #ifdef INVARIANTS 603 panic("No memory for IFA"); 604 #endif 605 return (NULL); 606 } 607 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 608 sctp_ifap->ifn_p = sctp_ifnp; 609 atomic_add_int(&sctp_ifnp->refcount, 1); 610 sctp_ifap->vrf_id = vrf_id; 611 sctp_ifap->ifa = ifa; 612 memcpy(&sctp_ifap->address, addr, addr->sa_len); 613 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 614 sctp_ifap->flags = ifa_flags; 615 /* Set scope */ 616 switch (sctp_ifap->address.sa.sa_family) { 617 case AF_INET: 618 { 619 struct sockaddr_in *sin; 620 621 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 622 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 623 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 624 sctp_ifap->src_is_loop = 1; 625 } 626 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 627 sctp_ifap->src_is_priv = 1; 628 } 629 sctp_ifnp->num_v4++; 630 if (new_ifn_af) 631 new_ifn_af = AF_INET; 632 break; 633 } 634 #ifdef INET6 635 case AF_INET6: 636 { 637 /* ok to use deprecated addresses? */ 638 struct sockaddr_in6 *sin6; 639 640 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 641 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 642 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 643 sctp_ifap->src_is_loop = 1; 644 } 645 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 646 sctp_ifap->src_is_priv = 1; 647 } 648 sctp_ifnp->num_v6++; 649 if (new_ifn_af) 650 new_ifn_af = AF_INET6; 651 break; 652 } 653 #endif 654 default: 655 new_ifn_af = 0; 656 break; 657 } 658 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 659 660 if ((sctp_ifap->src_is_priv == 0) && 661 (sctp_ifap->src_is_loop == 0)) { 662 sctp_ifap->src_is_glob = 1; 663 } 664 SCTP_IPI_ADDR_WLOCK(); 665 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 666 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 667 sctp_ifap->refcount = 1; 668 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 669 sctp_ifnp->ifa_count++; 670 vrf->total_ifa_count++; 671 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 672 if (new_ifn_af) { 673 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 674 sctp_ifnp->registered_af = new_ifn_af; 675 } 676 SCTP_IPI_ADDR_WUNLOCK(); 677 if (dynamic_add) { 678 /* 679 * Bump up the refcount so that when the timer completes it 680 * will drop back down. 681 */ 682 struct sctp_laddr *wi; 683 684 atomic_add_int(&sctp_ifap->refcount, 1); 685 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 686 if (wi == NULL) { 687 /* 688 * Gak, what can we do? We have lost an address 689 * change can you say HOSED? 690 */ 691 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 692 /* Opps, must decrement the count */ 693 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 694 if_name); 695 return (NULL); 696 } 697 SCTP_INCR_LADDR_COUNT(); 698 bzero(wi, sizeof(*wi)); 699 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 700 wi->ifa = sctp_ifap; 701 wi->action = SCTP_ADD_IP_ADDRESS; 702 703 SCTP_WQ_ADDR_LOCK(); 704 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 705 SCTP_WQ_ADDR_UNLOCK(); 706 707 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 708 (struct sctp_inpcb *)NULL, 709 (struct sctp_tcb *)NULL, 710 (struct sctp_nets *)NULL); 711 } else { 712 /* it's ready for use */ 713 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 714 } 715 return (sctp_ifap); 716 } 717 718 void 719 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 720 uint32_t ifn_index, const char *if_name) 721 { 722 struct sctp_vrf *vrf; 723 struct sctp_ifa *sctp_ifap = NULL; 724 725 SCTP_IPI_ADDR_WLOCK(); 726 vrf = sctp_find_vrf(vrf_id); 727 if (vrf == NULL) { 728 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 729 goto out_now; 730 } 731 #ifdef SCTP_DEBUG 732 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 733 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 734 #endif 735 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 736 if (sctp_ifap) { 737 /* Validate the delete */ 738 if (sctp_ifap->ifn_p) { 739 int valid = 0; 740 741 /*- 742 * The name has priority over the ifn_index 743 * if its given. We do this especially for 744 * panda who might recycle indexes fast. 745 */ 746 if (if_name) { 747 int len1, len2; 748 749 len1 = min(SCTP_IFNAMSIZ, strlen(if_name)); 750 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name)); 751 if (len1 && len2 && (len1 == len2)) { 752 /* we can compare them */ 753 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) { 754 /* 755 * They match its a correct 756 * delete 757 */ 758 valid = 1; 759 } 760 } 761 } 762 if (!valid) { 763 /* last ditch check ifn_index */ 764 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 765 valid = 1; 766 } 767 } 768 if (!valid) { 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 770 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 771 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 772 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 773 SCTP_IPI_ADDR_WUNLOCK(); 774 return; 775 } 776 } 777 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap); 778 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 779 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 780 vrf->total_ifa_count--; 781 LIST_REMOVE(sctp_ifap, next_bucket); 782 sctp_remove_ifa_from_ifn(sctp_ifap); 783 } 784 #ifdef SCTP_DEBUG 785 else { 786 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 787 ifn_index); 788 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 789 } 790 #endif 791 792 out_now: 793 SCTP_IPI_ADDR_WUNLOCK(); 794 if (sctp_ifap) { 795 struct sctp_laddr *wi; 796 797 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 798 if (wi == NULL) { 799 /* 800 * Gak, what can we do? We have lost an address 801 * change can you say HOSED? 802 */ 803 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 804 805 /* Oops, must decrement the count */ 806 sctp_free_ifa(sctp_ifap); 807 return; 808 } 809 SCTP_INCR_LADDR_COUNT(); 810 bzero(wi, sizeof(*wi)); 811 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 812 wi->ifa = sctp_ifap; 813 wi->action = SCTP_DEL_IP_ADDRESS; 814 SCTP_WQ_ADDR_LOCK(); 815 /* 816 * Should this really be a tailq? As it is we will process 817 * the newest first :-0 818 */ 819 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 820 SCTP_WQ_ADDR_UNLOCK(); 821 822 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 823 (struct sctp_inpcb *)NULL, 824 (struct sctp_tcb *)NULL, 825 (struct sctp_nets *)NULL); 826 } 827 return; 828 } 829 830 831 static struct sctp_tcb * 832 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 833 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 834 { 835 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 836 /* 837 * If we support the TCP model, then we must now dig through to see 838 * if we can find our endpoint in the list of tcp ep's. 839 */ 840 uint16_t lport, rport; 841 struct sctppcbhead *ephead; 842 struct sctp_inpcb *inp; 843 struct sctp_laddr *laddr; 844 struct sctp_tcb *stcb; 845 struct sctp_nets *net; 846 847 if ((to == NULL) || (from == NULL)) { 848 return (NULL); 849 } 850 if (to->sa_family == AF_INET && from->sa_family == AF_INET) { 851 lport = ((struct sockaddr_in *)to)->sin_port; 852 rport = ((struct sockaddr_in *)from)->sin_port; 853 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) { 854 lport = ((struct sockaddr_in6 *)to)->sin6_port; 855 rport = ((struct sockaddr_in6 *)from)->sin6_port; 856 } else { 857 return NULL; 858 } 859 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 860 /* 861 * Ok now for each of the guys in this bucket we must look and see: 862 * - Does the remote port match. - Does there single association's 863 * addresses match this address (to). If so we update p_ep to point 864 * to this ep and return the tcb from it. 865 */ 866 LIST_FOREACH(inp, ephead, sctp_hash) { 867 SCTP_INP_RLOCK(inp); 868 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 869 SCTP_INP_RUNLOCK(inp); 870 continue; 871 } 872 if (lport != inp->sctp_lport) { 873 SCTP_INP_RUNLOCK(inp); 874 continue; 875 } 876 if (inp->def_vrf_id != vrf_id) { 877 SCTP_INP_RUNLOCK(inp); 878 continue; 879 } 880 /* check to see if the ep has one of the addresses */ 881 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 882 /* We are NOT bound all, so look further */ 883 int match = 0; 884 885 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 886 887 if (laddr->ifa == NULL) { 888 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 889 continue; 890 } 891 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 892 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 893 continue; 894 } 895 if (laddr->ifa->address.sa.sa_family == 896 to->sa_family) { 897 /* see if it matches */ 898 struct sockaddr_in *intf_addr, *sin; 899 900 intf_addr = &laddr->ifa->address.sin; 901 sin = (struct sockaddr_in *)to; 902 if (from->sa_family == AF_INET) { 903 if (sin->sin_addr.s_addr == 904 intf_addr->sin_addr.s_addr) { 905 match = 1; 906 break; 907 } 908 } 909 #ifdef INET6 910 if (from->sa_family == AF_INET6) { 911 struct sockaddr_in6 *intf_addr6; 912 struct sockaddr_in6 *sin6; 913 914 sin6 = (struct sockaddr_in6 *) 915 to; 916 intf_addr6 = &laddr->ifa->address.sin6; 917 918 if (SCTP6_ARE_ADDR_EQUAL(sin6, 919 intf_addr6)) { 920 match = 1; 921 break; 922 } 923 } 924 #endif 925 } 926 } 927 if (match == 0) { 928 /* This endpoint does not have this address */ 929 SCTP_INP_RUNLOCK(inp); 930 continue; 931 } 932 } 933 /* 934 * Ok if we hit here the ep has the address, does it hold 935 * the tcb? 936 */ 937 938 stcb = LIST_FIRST(&inp->sctp_asoc_list); 939 if (stcb == NULL) { 940 SCTP_INP_RUNLOCK(inp); 941 continue; 942 } 943 SCTP_TCB_LOCK(stcb); 944 if (stcb->rport != rport) { 945 /* remote port does not match. */ 946 SCTP_TCB_UNLOCK(stcb); 947 SCTP_INP_RUNLOCK(inp); 948 continue; 949 } 950 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 951 SCTP_TCB_UNLOCK(stcb); 952 SCTP_INP_RUNLOCK(inp); 953 continue; 954 } 955 /* Does this TCB have a matching address? */ 956 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 957 958 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 959 /* not the same family, can't be a match */ 960 continue; 961 } 962 switch (from->sa_family) { 963 case AF_INET: 964 { 965 struct sockaddr_in *sin, *rsin; 966 967 sin = (struct sockaddr_in *)&net->ro._l_addr; 968 rsin = (struct sockaddr_in *)from; 969 if (sin->sin_addr.s_addr == 970 rsin->sin_addr.s_addr) { 971 /* found it */ 972 if (netp != NULL) { 973 *netp = net; 974 } 975 /* 976 * Update the endpoint 977 * pointer 978 */ 979 *inp_p = inp; 980 SCTP_INP_RUNLOCK(inp); 981 return (stcb); 982 } 983 break; 984 } 985 #ifdef INET6 986 case AF_INET6: 987 { 988 struct sockaddr_in6 *sin6, *rsin6; 989 990 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 991 rsin6 = (struct sockaddr_in6 *)from; 992 if (SCTP6_ARE_ADDR_EQUAL(sin6, 993 rsin6)) { 994 /* found it */ 995 if (netp != NULL) { 996 *netp = net; 997 } 998 /* 999 * Update the endpoint 1000 * pointer 1001 */ 1002 *inp_p = inp; 1003 SCTP_INP_RUNLOCK(inp); 1004 return (stcb); 1005 } 1006 break; 1007 } 1008 #endif 1009 default: 1010 /* TSNH */ 1011 break; 1012 } 1013 } 1014 SCTP_TCB_UNLOCK(stcb); 1015 SCTP_INP_RUNLOCK(inp); 1016 } 1017 return (NULL); 1018 } 1019 1020 static int 1021 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1022 { 1023 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 1024 int ipv4_addr_legal, ipv6_addr_legal; 1025 struct sctp_vrf *vrf; 1026 struct sctp_ifn *sctp_ifn; 1027 struct sctp_ifa *sctp_ifa; 1028 1029 loopback_scope = stcb->asoc.loopback_scope; 1030 ipv4_local_scope = stcb->asoc.ipv4_local_scope; 1031 local_scope = stcb->asoc.local_scope; 1032 site_scope = stcb->asoc.site_scope; 1033 ipv4_addr_legal = ipv6_addr_legal = 0; 1034 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1035 ipv6_addr_legal = 1; 1036 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) { 1037 ipv4_addr_legal = 1; 1038 } 1039 } else { 1040 ipv4_addr_legal = 1; 1041 } 1042 1043 SCTP_IPI_ADDR_RLOCK(); 1044 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1045 if (vrf == NULL) { 1046 /* no vrf, no addresses */ 1047 SCTP_IPI_ADDR_RUNLOCK(); 1048 return (0); 1049 } 1050 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1051 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1052 if ((loopback_scope == 0) && 1053 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1054 continue; 1055 } 1056 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1057 if (sctp_is_addr_restricted(stcb, sctp_ifa)) 1058 continue; 1059 switch (sctp_ifa->address.sa.sa_family) { 1060 #ifdef INET 1061 case AF_INET: 1062 if (ipv4_addr_legal) { 1063 struct sockaddr_in *sin, 1064 *rsin; 1065 1066 sin = &sctp_ifa->address.sin; 1067 rsin = (struct sockaddr_in *)to; 1068 if ((ipv4_local_scope == 0) && 1069 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1070 continue; 1071 } 1072 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1073 SCTP_IPI_ADDR_RUNLOCK(); 1074 return (1); 1075 } 1076 } 1077 break; 1078 #endif 1079 #ifdef INET6 1080 case AF_INET6: 1081 if (ipv6_addr_legal) { 1082 struct sockaddr_in6 *sin6, 1083 *rsin6; 1084 1085 sin6 = &sctp_ifa->address.sin6; 1086 rsin6 = (struct sockaddr_in6 *)to; 1087 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1088 if (local_scope == 0) 1089 continue; 1090 if (sin6->sin6_scope_id == 0) { 1091 if (sa6_recoverscope(sin6) != 0) 1092 continue; 1093 } 1094 } 1095 if ((site_scope == 0) && 1096 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1097 continue; 1098 } 1099 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1100 SCTP_IPI_ADDR_RUNLOCK(); 1101 return (1); 1102 } 1103 } 1104 break; 1105 #endif 1106 default: 1107 /* TSNH */ 1108 break; 1109 } 1110 } 1111 } 1112 } else { 1113 struct sctp_laddr *laddr; 1114 1115 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1116 if (sctp_is_addr_restricted(stcb, laddr->ifa)) { 1117 continue; 1118 } 1119 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 1120 continue; 1121 } 1122 switch (to->sa_family) { 1123 #ifdef INET 1124 case AF_INET: 1125 { 1126 struct sockaddr_in *sin, *rsin; 1127 1128 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 1129 rsin = (struct sockaddr_in *)to; 1130 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1131 SCTP_IPI_ADDR_RUNLOCK(); 1132 return (1); 1133 } 1134 break; 1135 } 1136 #endif 1137 #ifdef INET6 1138 case AF_INET6: 1139 { 1140 struct sockaddr_in6 *sin6, *rsin6; 1141 1142 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1143 rsin6 = (struct sockaddr_in6 *)to; 1144 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1145 SCTP_IPI_ADDR_RUNLOCK(); 1146 return (1); 1147 } 1148 break; 1149 } 1150 1151 #endif 1152 default: 1153 /* TSNH */ 1154 break; 1155 } 1156 1157 } 1158 } 1159 SCTP_IPI_ADDR_RUNLOCK(); 1160 return (0); 1161 } 1162 1163 /* 1164 * rules for use 1165 * 1166 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1167 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1168 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1169 * NULL. 1170 */ 1171 1172 struct sctp_tcb * 1173 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1174 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1175 { 1176 struct sctpasochead *head; 1177 struct sctp_inpcb *inp; 1178 struct sctp_tcb *stcb = NULL; 1179 struct sctp_nets *net; 1180 uint16_t rport; 1181 1182 inp = *inp_p; 1183 if (remote->sa_family == AF_INET) { 1184 rport = (((struct sockaddr_in *)remote)->sin_port); 1185 } else if (remote->sa_family == AF_INET6) { 1186 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1187 } else { 1188 return (NULL); 1189 } 1190 if (locked_tcb) { 1191 /* 1192 * UN-lock so we can do proper locking here this occurs when 1193 * called from load_addresses_from_init. 1194 */ 1195 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1196 SCTP_TCB_UNLOCK(locked_tcb); 1197 } 1198 SCTP_INP_INFO_RLOCK(); 1199 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1200 /*- 1201 * Now either this guy is our listener or it's the 1202 * connector. If it is the one that issued the connect, then 1203 * it's only chance is to be the first TCB in the list. If 1204 * it is the acceptor, then do the special_lookup to hash 1205 * and find the real inp. 1206 */ 1207 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1208 /* to is peer addr, from is my addr */ 1209 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1210 netp, inp->def_vrf_id); 1211 if ((stcb != NULL) && (locked_tcb == NULL)) { 1212 /* we have a locked tcb, lower refcount */ 1213 SCTP_INP_DECR_REF(inp); 1214 } 1215 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1216 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1217 SCTP_TCB_LOCK(locked_tcb); 1218 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1219 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1220 } 1221 SCTP_INP_INFO_RUNLOCK(); 1222 return (stcb); 1223 } else { 1224 SCTP_INP_WLOCK(inp); 1225 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1226 goto null_return; 1227 } 1228 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1229 if (stcb == NULL) { 1230 goto null_return; 1231 } 1232 SCTP_TCB_LOCK(stcb); 1233 1234 if (stcb->rport != rport) { 1235 /* remote port does not match. */ 1236 SCTP_TCB_UNLOCK(stcb); 1237 goto null_return; 1238 } 1239 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1240 SCTP_TCB_UNLOCK(stcb); 1241 goto null_return; 1242 } 1243 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1244 SCTP_TCB_UNLOCK(stcb); 1245 goto null_return; 1246 } 1247 /* now look at the list of remote addresses */ 1248 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1249 #ifdef INVARIANTS 1250 if (net == (TAILQ_NEXT(net, sctp_next))) { 1251 panic("Corrupt net list"); 1252 } 1253 #endif 1254 if (net->ro._l_addr.sa.sa_family != 1255 remote->sa_family) { 1256 /* not the same family */ 1257 continue; 1258 } 1259 switch (remote->sa_family) { 1260 case AF_INET: 1261 { 1262 struct sockaddr_in *sin, 1263 *rsin; 1264 1265 sin = (struct sockaddr_in *) 1266 &net->ro._l_addr; 1267 rsin = (struct sockaddr_in *)remote; 1268 if (sin->sin_addr.s_addr == 1269 rsin->sin_addr.s_addr) { 1270 /* found it */ 1271 if (netp != NULL) { 1272 *netp = net; 1273 } 1274 if (locked_tcb == NULL) { 1275 SCTP_INP_DECR_REF(inp); 1276 } else if (locked_tcb != stcb) { 1277 SCTP_TCB_LOCK(locked_tcb); 1278 } 1279 if (locked_tcb) { 1280 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1281 } 1282 SCTP_INP_WUNLOCK(inp); 1283 SCTP_INP_INFO_RUNLOCK(); 1284 return (stcb); 1285 } 1286 break; 1287 } 1288 #ifdef INET6 1289 case AF_INET6: 1290 { 1291 struct sockaddr_in6 *sin6, 1292 *rsin6; 1293 1294 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1295 rsin6 = (struct sockaddr_in6 *)remote; 1296 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1297 rsin6)) { 1298 /* found it */ 1299 if (netp != NULL) { 1300 *netp = net; 1301 } 1302 if (locked_tcb == NULL) { 1303 SCTP_INP_DECR_REF(inp); 1304 } else if (locked_tcb != stcb) { 1305 SCTP_TCB_LOCK(locked_tcb); 1306 } 1307 if (locked_tcb) { 1308 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1309 } 1310 SCTP_INP_WUNLOCK(inp); 1311 SCTP_INP_INFO_RUNLOCK(); 1312 return (stcb); 1313 } 1314 break; 1315 } 1316 #endif 1317 default: 1318 /* TSNH */ 1319 break; 1320 } 1321 } 1322 SCTP_TCB_UNLOCK(stcb); 1323 } 1324 } else { 1325 SCTP_INP_WLOCK(inp); 1326 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1327 goto null_return; 1328 } 1329 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1330 inp->sctp_hashmark)]; 1331 if (head == NULL) { 1332 goto null_return; 1333 } 1334 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1335 if (stcb->rport != rport) { 1336 /* remote port does not match */ 1337 continue; 1338 } 1339 SCTP_TCB_LOCK(stcb); 1340 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1341 SCTP_TCB_UNLOCK(stcb); 1342 continue; 1343 } 1344 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1345 SCTP_TCB_UNLOCK(stcb); 1346 continue; 1347 } 1348 /* now look at the list of remote addresses */ 1349 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1350 #ifdef INVARIANTS 1351 if (net == (TAILQ_NEXT(net, sctp_next))) { 1352 panic("Corrupt net list"); 1353 } 1354 #endif 1355 if (net->ro._l_addr.sa.sa_family != 1356 remote->sa_family) { 1357 /* not the same family */ 1358 continue; 1359 } 1360 switch (remote->sa_family) { 1361 case AF_INET: 1362 { 1363 struct sockaddr_in *sin, 1364 *rsin; 1365 1366 sin = (struct sockaddr_in *) 1367 &net->ro._l_addr; 1368 rsin = (struct sockaddr_in *)remote; 1369 if (sin->sin_addr.s_addr == 1370 rsin->sin_addr.s_addr) { 1371 /* found it */ 1372 if (netp != NULL) { 1373 *netp = net; 1374 } 1375 if (locked_tcb == NULL) { 1376 SCTP_INP_DECR_REF(inp); 1377 } else if (locked_tcb != stcb) { 1378 SCTP_TCB_LOCK(locked_tcb); 1379 } 1380 if (locked_tcb) { 1381 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1382 } 1383 SCTP_INP_WUNLOCK(inp); 1384 SCTP_INP_INFO_RUNLOCK(); 1385 return (stcb); 1386 } 1387 break; 1388 } 1389 #ifdef INET6 1390 case AF_INET6: 1391 { 1392 struct sockaddr_in6 *sin6, 1393 *rsin6; 1394 1395 sin6 = (struct sockaddr_in6 *) 1396 &net->ro._l_addr; 1397 rsin6 = (struct sockaddr_in6 *)remote; 1398 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1399 rsin6)) { 1400 /* found it */ 1401 if (netp != NULL) { 1402 *netp = net; 1403 } 1404 if (locked_tcb == NULL) { 1405 SCTP_INP_DECR_REF(inp); 1406 } else if (locked_tcb != stcb) { 1407 SCTP_TCB_LOCK(locked_tcb); 1408 } 1409 if (locked_tcb) { 1410 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1411 } 1412 SCTP_INP_WUNLOCK(inp); 1413 SCTP_INP_INFO_RUNLOCK(); 1414 return (stcb); 1415 } 1416 break; 1417 } 1418 #endif 1419 default: 1420 /* TSNH */ 1421 break; 1422 } 1423 } 1424 SCTP_TCB_UNLOCK(stcb); 1425 } 1426 } 1427 null_return: 1428 /* clean up for returning null */ 1429 if (locked_tcb) { 1430 SCTP_TCB_LOCK(locked_tcb); 1431 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1432 } 1433 SCTP_INP_WUNLOCK(inp); 1434 SCTP_INP_INFO_RUNLOCK(); 1435 /* not found */ 1436 return (NULL); 1437 } 1438 1439 /* 1440 * Find an association for a specific endpoint using the association id given 1441 * out in the COMM_UP notification 1442 */ 1443 1444 struct sctp_tcb * 1445 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1446 { 1447 /* 1448 * Use my the assoc_id to find a endpoint 1449 */ 1450 struct sctpasochead *head; 1451 struct sctp_tcb *stcb; 1452 uint32_t id; 1453 1454 if (inp == NULL) { 1455 SCTP_PRINTF("TSNH ep_associd\n"); 1456 return (NULL); 1457 } 1458 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1459 SCTP_PRINTF("TSNH ep_associd0\n"); 1460 return (NULL); 1461 } 1462 id = (uint32_t) asoc_id; 1463 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1464 if (head == NULL) { 1465 /* invalid id TSNH */ 1466 SCTP_PRINTF("TSNH ep_associd1\n"); 1467 return (NULL); 1468 } 1469 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1470 if (stcb->asoc.assoc_id == id) { 1471 if (inp != stcb->sctp_ep) { 1472 /* 1473 * some other guy has the same id active (id 1474 * collision ??). 1475 */ 1476 SCTP_PRINTF("TSNH ep_associd2\n"); 1477 continue; 1478 } 1479 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1480 continue; 1481 } 1482 if (want_lock) { 1483 SCTP_TCB_LOCK(stcb); 1484 } 1485 return (stcb); 1486 } 1487 } 1488 return (NULL); 1489 } 1490 1491 1492 struct sctp_tcb * 1493 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1494 { 1495 struct sctp_tcb *stcb; 1496 1497 SCTP_INP_RLOCK(inp); 1498 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1499 SCTP_INP_RUNLOCK(inp); 1500 return (stcb); 1501 } 1502 1503 1504 static struct sctp_inpcb * 1505 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1506 uint16_t lport, uint32_t vrf_id) 1507 { 1508 struct sctp_inpcb *inp; 1509 struct sockaddr_in *sin; 1510 1511 #ifdef INET6 1512 struct sockaddr_in6 *sin6; 1513 1514 #endif 1515 struct sctp_laddr *laddr; 1516 1517 #ifdef INET6 1518 struct sockaddr_in6 *intf_addr6; 1519 1520 #endif 1521 1522 int fnd; 1523 1524 /* 1525 * Endpoint probe expects that the INP_INFO is locked. 1526 */ 1527 sin = NULL; 1528 #ifdef INET6 1529 sin6 = NULL; 1530 #endif 1531 switch (nam->sa_family) { 1532 case AF_INET: 1533 sin = (struct sockaddr_in *)nam; 1534 break; 1535 #ifdef INET6 1536 case AF_INET6: 1537 sin6 = (struct sockaddr_in6 *)nam; 1538 break; 1539 #endif 1540 default: 1541 /* unsupported family */ 1542 return (NULL); 1543 } 1544 1545 if (head == NULL) 1546 return (NULL); 1547 1548 LIST_FOREACH(inp, head, sctp_hash) { 1549 SCTP_INP_RLOCK(inp); 1550 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1551 SCTP_INP_RUNLOCK(inp); 1552 continue; 1553 } 1554 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1555 (inp->sctp_lport == lport)) { 1556 /* got it */ 1557 if ((nam->sa_family == AF_INET) && 1558 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1559 SCTP_IPV6_V6ONLY(inp)) { 1560 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1561 SCTP_INP_RUNLOCK(inp); 1562 continue; 1563 } 1564 /* A V6 address and the endpoint is NOT bound V6 */ 1565 if (nam->sa_family == AF_INET6 && 1566 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1567 SCTP_INP_RUNLOCK(inp); 1568 continue; 1569 } 1570 /* does a VRF id match? */ 1571 fnd = 0; 1572 if (inp->def_vrf_id == vrf_id) 1573 fnd = 1; 1574 1575 SCTP_INP_RUNLOCK(inp); 1576 if (!fnd) 1577 continue; 1578 return (inp); 1579 } 1580 SCTP_INP_RUNLOCK(inp); 1581 } 1582 if ((nam->sa_family == AF_INET) && 1583 (sin->sin_addr.s_addr == INADDR_ANY)) { 1584 /* Can't hunt for one that has no address specified */ 1585 return (NULL); 1586 } 1587 #ifdef INET6 1588 if ((nam->sa_family == AF_INET6) && 1589 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 1590 /* Can't hunt for one that has no address specified */ 1591 return (NULL); 1592 } 1593 #endif 1594 /* 1595 * ok, not bound to all so see if we can find a EP bound to this 1596 * address. 1597 */ 1598 LIST_FOREACH(inp, head, sctp_hash) { 1599 SCTP_INP_RLOCK(inp); 1600 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1601 SCTP_INP_RUNLOCK(inp); 1602 continue; 1603 } 1604 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1605 SCTP_INP_RUNLOCK(inp); 1606 continue; 1607 } 1608 /* 1609 * Ok this could be a likely candidate, look at all of its 1610 * addresses 1611 */ 1612 if (inp->sctp_lport != lport) { 1613 SCTP_INP_RUNLOCK(inp); 1614 continue; 1615 } 1616 /* does a VRF id match? */ 1617 fnd = 0; 1618 if (inp->def_vrf_id == vrf_id) 1619 fnd = 1; 1620 1621 if (!fnd) { 1622 SCTP_INP_RUNLOCK(inp); 1623 continue; 1624 } 1625 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1626 if (laddr->ifa == NULL) { 1627 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1628 __FUNCTION__); 1629 continue; 1630 } 1631 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1632 laddr->ifa); 1633 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1634 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1635 continue; 1636 } 1637 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1638 /* possible, see if it matches */ 1639 struct sockaddr_in *intf_addr; 1640 1641 intf_addr = &laddr->ifa->address.sin; 1642 switch (nam->sa_family) { 1643 case AF_INET: 1644 if (sin->sin_addr.s_addr == 1645 intf_addr->sin_addr.s_addr) { 1646 SCTP_INP_RUNLOCK(inp); 1647 return (inp); 1648 } 1649 break; 1650 #ifdef INET6 1651 case AF_INET6: 1652 intf_addr6 = &laddr->ifa->address.sin6; 1653 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1654 intf_addr6)) { 1655 SCTP_INP_RUNLOCK(inp); 1656 return (inp); 1657 } 1658 break; 1659 #endif 1660 } 1661 } 1662 } 1663 SCTP_INP_RUNLOCK(inp); 1664 } 1665 return (NULL); 1666 } 1667 1668 1669 static struct sctp_inpcb * 1670 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1671 { 1672 struct sctppcbhead *head; 1673 struct sctp_inpcb *t_inp; 1674 int fnd; 1675 1676 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1677 SCTP_BASE_INFO(hashmark))]; 1678 LIST_FOREACH(t_inp, head, sctp_hash) { 1679 if (t_inp->sctp_lport != lport) { 1680 continue; 1681 } 1682 /* is it in the VRF in question */ 1683 fnd = 0; 1684 if (t_inp->def_vrf_id == vrf_id) 1685 fnd = 1; 1686 if (!fnd) 1687 continue; 1688 1689 /* This one is in use. */ 1690 /* check the v6/v4 binding issue */ 1691 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1692 SCTP_IPV6_V6ONLY(t_inp)) { 1693 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1694 /* collision in V6 space */ 1695 return (t_inp); 1696 } else { 1697 /* inp is BOUND_V4 no conflict */ 1698 continue; 1699 } 1700 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1701 /* t_inp is bound v4 and v6, conflict always */ 1702 return (t_inp); 1703 } else { 1704 /* t_inp is bound only V4 */ 1705 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1706 SCTP_IPV6_V6ONLY(inp)) { 1707 /* no conflict */ 1708 continue; 1709 } 1710 /* else fall through to conflict */ 1711 } 1712 return (t_inp); 1713 } 1714 return (NULL); 1715 } 1716 1717 1718 int 1719 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1720 { 1721 /* For 1-2-1 with port reuse */ 1722 struct sctppcbhead *head; 1723 struct sctp_inpcb *tinp; 1724 1725 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1726 /* only works with port reuse on */ 1727 return (-1); 1728 } 1729 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1730 return (0); 1731 } 1732 SCTP_INP_RUNLOCK(inp); 1733 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1734 SCTP_BASE_INFO(hashmark))]; 1735 /* Kick out all non-listeners to the TCP hash */ 1736 LIST_FOREACH(tinp, head, sctp_hash) { 1737 if (tinp->sctp_lport != inp->sctp_lport) { 1738 continue; 1739 } 1740 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1741 continue; 1742 } 1743 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1744 continue; 1745 } 1746 if (tinp->sctp_socket->so_qlimit) { 1747 continue; 1748 } 1749 SCTP_INP_WLOCK(tinp); 1750 LIST_REMOVE(tinp, sctp_hash); 1751 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1752 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1753 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1754 SCTP_INP_WUNLOCK(tinp); 1755 } 1756 SCTP_INP_WLOCK(inp); 1757 /* Pull from where he was */ 1758 LIST_REMOVE(inp, sctp_hash); 1759 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1760 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1761 LIST_INSERT_HEAD(head, inp, sctp_hash); 1762 SCTP_INP_WUNLOCK(inp); 1763 SCTP_INP_RLOCK(inp); 1764 return (0); 1765 } 1766 1767 1768 struct sctp_inpcb * 1769 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1770 uint32_t vrf_id) 1771 { 1772 /* 1773 * First we check the hash table to see if someone has this port 1774 * bound with just the port. 1775 */ 1776 struct sctp_inpcb *inp; 1777 struct sctppcbhead *head; 1778 struct sockaddr_in *sin; 1779 struct sockaddr_in6 *sin6; 1780 int lport; 1781 unsigned int i; 1782 1783 if (nam->sa_family == AF_INET) { 1784 sin = (struct sockaddr_in *)nam; 1785 lport = ((struct sockaddr_in *)nam)->sin_port; 1786 } else if (nam->sa_family == AF_INET6) { 1787 sin6 = (struct sockaddr_in6 *)nam; 1788 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1789 } else { 1790 /* unsupported family */ 1791 return (NULL); 1792 } 1793 /* 1794 * I could cheat here and just cast to one of the types but we will 1795 * do it right. It also provides the check against an Unsupported 1796 * type too. 1797 */ 1798 /* Find the head of the ALLADDR chain */ 1799 if (have_lock == 0) { 1800 SCTP_INP_INFO_RLOCK(); 1801 } 1802 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1803 SCTP_BASE_INFO(hashmark))]; 1804 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1805 1806 /* 1807 * If the TCP model exists it could be that the main listening 1808 * endpoint is gone but there still exists a connected socket for 1809 * this guy. If so we can return the first one that we find. This 1810 * may NOT be the correct one so the caller should be wary on the 1811 * returned INP. Currently the only caller that sets find_tcp_pool 1812 * is in bindx where we are verifying that a user CAN bind the 1813 * address. He either has bound it already, or someone else has, or 1814 * its open to bind, so this is good enough. 1815 */ 1816 if (inp == NULL && find_tcp_pool) { 1817 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1818 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1819 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1820 if (inp) { 1821 break; 1822 } 1823 } 1824 } 1825 if (inp) { 1826 SCTP_INP_INCR_REF(inp); 1827 } 1828 if (have_lock == 0) { 1829 SCTP_INP_INFO_RUNLOCK(); 1830 } 1831 return (inp); 1832 } 1833 1834 /* 1835 * Find an association for an endpoint with the pointer to whom you want to 1836 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1837 * need to change the *to to some other struct like a mbuf... 1838 */ 1839 struct sctp_tcb * 1840 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1841 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1842 uint32_t vrf_id) 1843 { 1844 struct sctp_inpcb *inp = NULL; 1845 struct sctp_tcb *retval; 1846 1847 SCTP_INP_INFO_RLOCK(); 1848 if (find_tcp_pool) { 1849 if (inp_p != NULL) { 1850 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1851 vrf_id); 1852 } else { 1853 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1854 vrf_id); 1855 } 1856 if (retval != NULL) { 1857 SCTP_INP_INFO_RUNLOCK(); 1858 return (retval); 1859 } 1860 } 1861 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1862 if (inp_p != NULL) { 1863 *inp_p = inp; 1864 } 1865 SCTP_INP_INFO_RUNLOCK(); 1866 1867 if (inp == NULL) { 1868 return (NULL); 1869 } 1870 /* 1871 * ok, we have an endpoint, now lets find the assoc for it (if any) 1872 * we now place the source address or from in the to of the find 1873 * endpoint call. Since in reality this chain is used from the 1874 * inbound packet side. 1875 */ 1876 if (inp_p != NULL) { 1877 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1878 NULL); 1879 } else { 1880 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1881 NULL); 1882 } 1883 return retval; 1884 } 1885 1886 1887 /* 1888 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1889 * find all addresses that the sender has specified in any address list. Each 1890 * address will be used to lookup the TCB and see if one exits. 1891 */ 1892 static struct sctp_tcb * 1893 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1894 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1895 struct sockaddr *dest) 1896 { 1897 struct sockaddr_in sin4; 1898 struct sockaddr_in6 sin6; 1899 struct sctp_paramhdr *phdr, parm_buf; 1900 struct sctp_tcb *retval; 1901 uint32_t ptype, plen; 1902 1903 memset(&sin4, 0, sizeof(sin4)); 1904 memset(&sin6, 0, sizeof(sin6)); 1905 sin4.sin_len = sizeof(sin4); 1906 sin4.sin_family = AF_INET; 1907 sin4.sin_port = sh->src_port; 1908 sin6.sin6_len = sizeof(sin6); 1909 sin6.sin6_family = AF_INET6; 1910 sin6.sin6_port = sh->src_port; 1911 1912 retval = NULL; 1913 offset += sizeof(struct sctp_init_chunk); 1914 1915 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1916 while (phdr != NULL) { 1917 /* now we must see if we want the parameter */ 1918 ptype = ntohs(phdr->param_type); 1919 plen = ntohs(phdr->param_length); 1920 if (plen == 0) { 1921 break; 1922 } 1923 if (ptype == SCTP_IPV4_ADDRESS && 1924 plen == sizeof(struct sctp_ipv4addr_param)) { 1925 /* Get the rest of the address */ 1926 struct sctp_ipv4addr_param ip4_parm, *p4; 1927 1928 phdr = sctp_get_next_param(m, offset, 1929 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1930 if (phdr == NULL) { 1931 return (NULL); 1932 } 1933 p4 = (struct sctp_ipv4addr_param *)phdr; 1934 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 1935 /* look it up */ 1936 retval = sctp_findassociation_ep_addr(inp_p, 1937 (struct sockaddr *)&sin4, netp, dest, NULL); 1938 if (retval != NULL) { 1939 return (retval); 1940 } 1941 } else if (ptype == SCTP_IPV6_ADDRESS && 1942 plen == sizeof(struct sctp_ipv6addr_param)) { 1943 /* Get the rest of the address */ 1944 struct sctp_ipv6addr_param ip6_parm, *p6; 1945 1946 phdr = sctp_get_next_param(m, offset, 1947 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 1948 if (phdr == NULL) { 1949 return (NULL); 1950 } 1951 p6 = (struct sctp_ipv6addr_param *)phdr; 1952 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 1953 /* look it up */ 1954 retval = sctp_findassociation_ep_addr(inp_p, 1955 (struct sockaddr *)&sin6, netp, dest, NULL); 1956 if (retval != NULL) { 1957 return (retval); 1958 } 1959 } 1960 offset += SCTP_SIZE32(plen); 1961 phdr = sctp_get_next_param(m, offset, &parm_buf, 1962 sizeof(parm_buf)); 1963 } 1964 return (NULL); 1965 } 1966 1967 static struct sctp_tcb * 1968 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 1969 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 1970 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 1971 { 1972 /* 1973 * Use my vtag to hash. If we find it we then verify the source addr 1974 * is in the assoc. If all goes well we save a bit on rec of a 1975 * packet. 1976 */ 1977 struct sctpasochead *head; 1978 struct sctp_nets *net; 1979 struct sctp_tcb *stcb; 1980 1981 *netp = NULL; 1982 *inp_p = NULL; 1983 SCTP_INP_INFO_RLOCK(); 1984 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 1985 SCTP_BASE_INFO(hashasocmark))]; 1986 if (head == NULL) { 1987 /* invalid vtag */ 1988 SCTP_INP_INFO_RUNLOCK(); 1989 return (NULL); 1990 } 1991 LIST_FOREACH(stcb, head, sctp_asocs) { 1992 SCTP_INP_RLOCK(stcb->sctp_ep); 1993 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1994 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1995 continue; 1996 } 1997 SCTP_TCB_LOCK(stcb); 1998 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1999 if (stcb->asoc.my_vtag == vtag) { 2000 /* candidate */ 2001 if (stcb->rport != rport) { 2002 SCTP_TCB_UNLOCK(stcb); 2003 continue; 2004 } 2005 if (stcb->sctp_ep->sctp_lport != lport) { 2006 SCTP_TCB_UNLOCK(stcb); 2007 continue; 2008 } 2009 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2010 SCTP_TCB_UNLOCK(stcb); 2011 continue; 2012 } 2013 /* RRS:Need toaddr check here */ 2014 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2015 /* Endpoint does not own this address */ 2016 SCTP_TCB_UNLOCK(stcb); 2017 continue; 2018 } 2019 if (remote_tag) { 2020 /* 2021 * If we have both vtags that's all we match 2022 * on 2023 */ 2024 if (stcb->asoc.peer_vtag == remote_tag) { 2025 /* 2026 * If both tags match we consider it 2027 * conclusive and check NO 2028 * source/destination addresses 2029 */ 2030 goto conclusive; 2031 } 2032 } 2033 if (skip_src_check) { 2034 conclusive: 2035 if (from) { 2036 net = sctp_findnet(stcb, from); 2037 } else { 2038 *netp = NULL; /* unknown */ 2039 } 2040 if (inp_p) 2041 *inp_p = stcb->sctp_ep; 2042 SCTP_INP_INFO_RUNLOCK(); 2043 return (stcb); 2044 } 2045 net = sctp_findnet(stcb, from); 2046 if (net) { 2047 /* yep its him. */ 2048 *netp = net; 2049 SCTP_STAT_INCR(sctps_vtagexpress); 2050 *inp_p = stcb->sctp_ep; 2051 SCTP_INP_INFO_RUNLOCK(); 2052 return (stcb); 2053 } else { 2054 /* 2055 * not him, this should only happen in rare 2056 * cases so I peg it. 2057 */ 2058 SCTP_STAT_INCR(sctps_vtagbogus); 2059 } 2060 } 2061 SCTP_TCB_UNLOCK(stcb); 2062 } 2063 SCTP_INP_INFO_RUNLOCK(); 2064 return (NULL); 2065 } 2066 2067 /* 2068 * Find an association with the pointer to the inbound IP packet. This can be 2069 * a IPv4 or IPv6 packet. 2070 */ 2071 struct sctp_tcb * 2072 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 2073 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2074 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2075 { 2076 int find_tcp_pool; 2077 struct ip *iph; 2078 struct sctp_tcb *retval; 2079 struct sockaddr_storage to_store, from_store; 2080 struct sockaddr *to = (struct sockaddr *)&to_store; 2081 struct sockaddr *from = (struct sockaddr *)&from_store; 2082 struct sctp_inpcb *inp; 2083 2084 iph = mtod(m, struct ip *); 2085 switch (iph->ip_v) { 2086 case IPVERSION: 2087 { 2088 /* its IPv4 */ 2089 struct sockaddr_in *from4; 2090 2091 from4 = (struct sockaddr_in *)&from_store; 2092 bzero(from4, sizeof(*from4)); 2093 from4->sin_family = AF_INET; 2094 from4->sin_len = sizeof(struct sockaddr_in); 2095 from4->sin_addr.s_addr = iph->ip_src.s_addr; 2096 from4->sin_port = sh->src_port; 2097 break; 2098 } 2099 #ifdef INET6 2100 case IPV6_VERSION >> 4: 2101 { 2102 /* its IPv6 */ 2103 struct ip6_hdr *ip6; 2104 struct sockaddr_in6 *from6; 2105 2106 ip6 = mtod(m, struct ip6_hdr *); 2107 from6 = (struct sockaddr_in6 *)&from_store; 2108 bzero(from6, sizeof(*from6)); 2109 from6->sin6_family = AF_INET6; 2110 from6->sin6_len = sizeof(struct sockaddr_in6); 2111 from6->sin6_addr = ip6->ip6_src; 2112 from6->sin6_port = sh->src_port; 2113 /* Get the scopes in properly to the sin6 addr's */ 2114 /* we probably don't need these operations */ 2115 (void)sa6_recoverscope(from6); 2116 sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone)); 2117 break; 2118 } 2119 #endif 2120 default: 2121 /* Currently not supported. */ 2122 return (NULL); 2123 } 2124 2125 2126 switch (iph->ip_v) { 2127 case IPVERSION: 2128 { 2129 /* its IPv4 */ 2130 struct sockaddr_in *to4; 2131 2132 to4 = (struct sockaddr_in *)&to_store; 2133 bzero(to4, sizeof(*to4)); 2134 to4->sin_family = AF_INET; 2135 to4->sin_len = sizeof(struct sockaddr_in); 2136 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 2137 to4->sin_port = sh->dest_port; 2138 break; 2139 } 2140 #ifdef INET6 2141 case IPV6_VERSION >> 4: 2142 { 2143 /* its IPv6 */ 2144 struct ip6_hdr *ip6; 2145 struct sockaddr_in6 *to6; 2146 2147 ip6 = mtod(m, struct ip6_hdr *); 2148 to6 = (struct sockaddr_in6 *)&to_store; 2149 bzero(to6, sizeof(*to6)); 2150 to6->sin6_family = AF_INET6; 2151 to6->sin6_len = sizeof(struct sockaddr_in6); 2152 to6->sin6_addr = ip6->ip6_dst; 2153 to6->sin6_port = sh->dest_port; 2154 /* Get the scopes in properly to the sin6 addr's */ 2155 /* we probably don't need these operations */ 2156 (void)sa6_recoverscope(to6); 2157 sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone)); 2158 break; 2159 } 2160 #endif 2161 default: 2162 /* TSNH */ 2163 break; 2164 } 2165 if (sh->v_tag) { 2166 /* we only go down this path if vtag is non-zero */ 2167 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag), 2168 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2169 if (retval) { 2170 return (retval); 2171 } 2172 } 2173 find_tcp_pool = 0; 2174 if ((ch->chunk_type != SCTP_INITIATION) && 2175 (ch->chunk_type != SCTP_INITIATION_ACK) && 2176 (ch->chunk_type != SCTP_COOKIE_ACK) && 2177 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2178 /* Other chunk types go to the tcp pool. */ 2179 find_tcp_pool = 1; 2180 } 2181 if (inp_p) { 2182 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 2183 find_tcp_pool, vrf_id); 2184 inp = *inp_p; 2185 } else { 2186 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 2187 find_tcp_pool, vrf_id); 2188 } 2189 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2190 if (retval == NULL && inp) { 2191 /* Found a EP but not this address */ 2192 if ((ch->chunk_type == SCTP_INITIATION) || 2193 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2194 /*- 2195 * special hook, we do NOT return linp or an 2196 * association that is linked to an existing 2197 * association that is under the TCP pool (i.e. no 2198 * listener exists). The endpoint finding routine 2199 * will always find a listener before examining the 2200 * TCP pool. 2201 */ 2202 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2203 if (inp_p) { 2204 *inp_p = NULL; 2205 } 2206 return (NULL); 2207 } 2208 retval = sctp_findassociation_special_addr(m, iphlen, 2209 offset, sh, &inp, netp, to); 2210 if (inp_p != NULL) { 2211 *inp_p = inp; 2212 } 2213 } 2214 } 2215 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2216 return (retval); 2217 } 2218 2219 /* 2220 * lookup an association by an ASCONF lookup address. 2221 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2222 */ 2223 struct sctp_tcb * 2224 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 2225 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2226 { 2227 struct sctp_tcb *stcb; 2228 struct sockaddr_in *sin; 2229 2230 #ifdef INET6 2231 struct sockaddr_in6 *sin6; 2232 2233 #endif 2234 struct sockaddr_storage local_store, remote_store; 2235 struct sockaddr *to; 2236 struct ip *iph; 2237 2238 #ifdef INET6 2239 struct ip6_hdr *ip6; 2240 2241 #endif 2242 struct sctp_paramhdr parm_buf, *phdr; 2243 int ptype; 2244 int zero_address = 0; 2245 2246 2247 memset(&local_store, 0, sizeof(local_store)); 2248 memset(&remote_store, 0, sizeof(remote_store)); 2249 to = (struct sockaddr *)&local_store; 2250 /* First get the destination address setup too. */ 2251 iph = mtod(m, struct ip *); 2252 switch (iph->ip_v) { 2253 case IPVERSION: 2254 /* its IPv4 */ 2255 sin = (struct sockaddr_in *)&local_store; 2256 sin->sin_family = AF_INET; 2257 sin->sin_len = sizeof(*sin); 2258 sin->sin_port = sh->dest_port; 2259 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 2260 break; 2261 #ifdef INET6 2262 case IPV6_VERSION >> 4: 2263 /* its IPv6 */ 2264 ip6 = mtod(m, struct ip6_hdr *); 2265 sin6 = (struct sockaddr_in6 *)&local_store; 2266 sin6->sin6_family = AF_INET6; 2267 sin6->sin6_len = sizeof(*sin6); 2268 sin6->sin6_port = sh->dest_port; 2269 sin6->sin6_addr = ip6->ip6_dst; 2270 break; 2271 #endif 2272 default: 2273 return NULL; 2274 } 2275 2276 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2277 &parm_buf, sizeof(struct sctp_paramhdr)); 2278 if (phdr == NULL) { 2279 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2280 __FUNCTION__); 2281 return NULL; 2282 } 2283 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2284 /* get the correlation address */ 2285 switch (ptype) { 2286 #ifdef INET6 2287 case SCTP_IPV6_ADDRESS: 2288 { 2289 /* ipv6 address param */ 2290 struct sctp_ipv6addr_param *p6, p6_buf; 2291 2292 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2293 return NULL; 2294 } 2295 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2296 offset + sizeof(struct sctp_asconf_chunk), 2297 &p6_buf.ph, sizeof(*p6)); 2298 if (p6 == NULL) { 2299 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2300 __FUNCTION__); 2301 return (NULL); 2302 } 2303 sin6 = (struct sockaddr_in6 *)&remote_store; 2304 sin6->sin6_family = AF_INET6; 2305 sin6->sin6_len = sizeof(*sin6); 2306 sin6->sin6_port = sh->src_port; 2307 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2308 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2309 zero_address = 1; 2310 break; 2311 } 2312 #endif 2313 case SCTP_IPV4_ADDRESS: 2314 { 2315 /* ipv4 address param */ 2316 struct sctp_ipv4addr_param *p4, p4_buf; 2317 2318 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2319 return NULL; 2320 } 2321 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2322 offset + sizeof(struct sctp_asconf_chunk), 2323 &p4_buf.ph, sizeof(*p4)); 2324 if (p4 == NULL) { 2325 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2326 __FUNCTION__); 2327 return (NULL); 2328 } 2329 sin = (struct sockaddr_in *)&remote_store; 2330 sin->sin_family = AF_INET; 2331 sin->sin_len = sizeof(*sin); 2332 sin->sin_port = sh->src_port; 2333 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2334 if (sin->sin_addr.s_addr == INADDR_ANY) 2335 zero_address = 1; 2336 break; 2337 } 2338 default: 2339 /* invalid address param type */ 2340 return NULL; 2341 } 2342 2343 if (zero_address) { 2344 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p, 2345 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2346 /* 2347 * printf("findassociation_ep_asconf: zero lookup address 2348 * finds stcb 0x%x\n", (uint32_t)stcb); 2349 */ 2350 } else { 2351 stcb = sctp_findassociation_ep_addr(inp_p, 2352 (struct sockaddr *)&remote_store, netp, 2353 to, NULL); 2354 } 2355 return (stcb); 2356 } 2357 2358 2359 /* 2360 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2361 * addresses. This way if we don't get a bind we by default pick a ephemeral 2362 * port with all addresses bound. 2363 */ 2364 int 2365 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2366 { 2367 /* 2368 * we get called when a new endpoint starts up. We need to allocate 2369 * the sctp_inpcb structure from the zone and init it. Mark it as 2370 * unbound and find a port that we can use as an ephemeral with 2371 * INADDR_ANY. If the user binds later no problem we can then add in 2372 * the specific addresses. And setup the default parameters for the 2373 * EP. 2374 */ 2375 int i, error; 2376 struct sctp_inpcb *inp; 2377 struct sctp_pcb *m; 2378 struct timeval time; 2379 sctp_sharedkey_t *null_key; 2380 2381 error = 0; 2382 2383 SCTP_INP_INFO_WLOCK(); 2384 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2385 if (inp == NULL) { 2386 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2387 SCTP_INP_INFO_WUNLOCK(); 2388 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2389 return (ENOBUFS); 2390 } 2391 /* zap it */ 2392 bzero(inp, sizeof(*inp)); 2393 2394 /* bump generations */ 2395 /* setup socket pointers */ 2396 inp->sctp_socket = so; 2397 inp->ip_inp.inp.inp_socket = so; 2398 inp->sctp_associd_counter = 1; 2399 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2400 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2401 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2402 /* init the small hash table we use to track asocid <-> tcb */ 2403 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2404 if (inp->sctp_asocidhash == NULL) { 2405 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2406 SCTP_INP_INFO_WUNLOCK(); 2407 return (ENOBUFS); 2408 } 2409 #ifdef IPSEC 2410 { 2411 struct inpcbpolicy *pcb_sp = NULL; 2412 2413 error = ipsec_init_policy(so, &pcb_sp); 2414 /* Arrange to share the policy */ 2415 inp->ip_inp.inp.inp_sp = pcb_sp; 2416 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2417 } 2418 if (error != 0) { 2419 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2420 SCTP_INP_INFO_WUNLOCK(); 2421 return error; 2422 } 2423 #endif /* IPSEC */ 2424 SCTP_INCR_EP_COUNT(); 2425 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2426 SCTP_INP_INFO_WUNLOCK(); 2427 2428 so->so_pcb = (caddr_t)inp; 2429 2430 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 2431 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 2432 /* UDP style socket */ 2433 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2434 SCTP_PCB_FLAGS_UNBOUND); 2435 /* Be sure it is NON-BLOCKING IO for UDP */ 2436 /* SCTP_SET_SO_NBIO(so); */ 2437 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2438 /* TCP style socket */ 2439 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2440 SCTP_PCB_FLAGS_UNBOUND); 2441 /* Be sure we have blocking IO by default */ 2442 SCTP_CLEAR_SO_NBIO(so); 2443 } else { 2444 /* 2445 * unsupported socket type (RAW, etc)- in case we missed it 2446 * in protosw 2447 */ 2448 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2449 so->so_pcb = NULL; 2450 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2451 return (EOPNOTSUPP); 2452 } 2453 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2454 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2455 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2456 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2457 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2458 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2459 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2460 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2461 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2462 } 2463 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2464 &inp->sctp_hashmark); 2465 if (inp->sctp_tcbhash == NULL) { 2466 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2467 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2468 so->so_pcb = NULL; 2469 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2470 return (ENOBUFS); 2471 } 2472 inp->def_vrf_id = vrf_id; 2473 2474 SCTP_INP_INFO_WLOCK(); 2475 SCTP_INP_LOCK_INIT(inp); 2476 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2477 SCTP_INP_READ_INIT(inp); 2478 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2479 /* lock the new ep */ 2480 SCTP_INP_WLOCK(inp); 2481 2482 /* add it to the info area */ 2483 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2484 SCTP_INP_INFO_WUNLOCK(); 2485 2486 TAILQ_INIT(&inp->read_queue); 2487 LIST_INIT(&inp->sctp_addr_list); 2488 2489 LIST_INIT(&inp->sctp_asoc_list); 2490 2491 #ifdef SCTP_TRACK_FREED_ASOCS 2492 /* TEMP CODE */ 2493 LIST_INIT(&inp->sctp_asoc_free_list); 2494 #endif 2495 /* Init the timer structure for signature change */ 2496 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2497 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2498 2499 /* now init the actual endpoint default data */ 2500 m = &inp->sctp_ep; 2501 2502 /* setup the base timeout information */ 2503 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2504 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2505 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2506 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2507 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2508 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2509 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2510 /* all max/min max are in ms */ 2511 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2512 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2513 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2514 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2515 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2516 2517 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2518 2519 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2520 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2521 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2522 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2523 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2524 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2525 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2526 2527 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2528 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2529 /* number of streams to pre-open on a association */ 2530 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2531 2532 /* Add adaptation cookie */ 2533 m->adaptation_layer_indicator = 0x504C5253; 2534 2535 /* seed random number generator */ 2536 m->random_counter = 1; 2537 m->store_at = SCTP_SIGNATURE_SIZE; 2538 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2539 sctp_fill_random_store(m); 2540 2541 /* Minimum cookie size */ 2542 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2543 sizeof(struct sctp_state_cookie); 2544 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2545 2546 /* Setup the initial secret */ 2547 (void)SCTP_GETTIME_TIMEVAL(&time); 2548 m->time_of_secret_change = time.tv_sec; 2549 2550 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2551 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2552 } 2553 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2554 2555 /* How long is a cookie good for ? */ 2556 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2557 /* 2558 * Initialize authentication parameters 2559 */ 2560 m->local_hmacs = sctp_default_supported_hmaclist(); 2561 m->local_auth_chunks = sctp_alloc_chunklist(); 2562 sctp_auth_set_default_chunks(m->local_auth_chunks); 2563 LIST_INIT(&m->shared_keys); 2564 /* add default NULL key as key id 0 */ 2565 null_key = sctp_alloc_sharedkey(); 2566 sctp_insert_sharedkey(&m->shared_keys, null_key); 2567 SCTP_INP_WUNLOCK(inp); 2568 #ifdef SCTP_LOG_CLOSING 2569 sctp_log_closing(inp, NULL, 12); 2570 #endif 2571 return (error); 2572 } 2573 2574 2575 void 2576 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2577 struct sctp_tcb *stcb) 2578 { 2579 struct sctp_nets *net; 2580 uint16_t lport, rport; 2581 struct sctppcbhead *head; 2582 struct sctp_laddr *laddr, *oladdr; 2583 2584 atomic_add_int(&stcb->asoc.refcnt, 1); 2585 SCTP_TCB_UNLOCK(stcb); 2586 SCTP_INP_INFO_WLOCK(); 2587 SCTP_INP_WLOCK(old_inp); 2588 SCTP_INP_WLOCK(new_inp); 2589 SCTP_TCB_LOCK(stcb); 2590 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2591 2592 new_inp->sctp_ep.time_of_secret_change = 2593 old_inp->sctp_ep.time_of_secret_change; 2594 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2595 sizeof(old_inp->sctp_ep.secret_key)); 2596 new_inp->sctp_ep.current_secret_number = 2597 old_inp->sctp_ep.current_secret_number; 2598 new_inp->sctp_ep.last_secret_number = 2599 old_inp->sctp_ep.last_secret_number; 2600 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2601 2602 /* make it so new data pours into the new socket */ 2603 stcb->sctp_socket = new_inp->sctp_socket; 2604 stcb->sctp_ep = new_inp; 2605 2606 /* Copy the port across */ 2607 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2608 rport = stcb->rport; 2609 /* Pull the tcb from the old association */ 2610 LIST_REMOVE(stcb, sctp_tcbhash); 2611 LIST_REMOVE(stcb, sctp_tcblist); 2612 if (stcb->asoc.in_asocid_hash) { 2613 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2614 } 2615 /* Now insert the new_inp into the TCP connected hash */ 2616 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2617 2618 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2619 /* Its safe to access */ 2620 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2621 2622 /* Now move the tcb into the endpoint list */ 2623 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2624 /* 2625 * Question, do we even need to worry about the ep-hash since we 2626 * only have one connection? Probably not :> so lets get rid of it 2627 * and not suck up any kernel memory in that. 2628 */ 2629 if (stcb->asoc.in_asocid_hash) { 2630 struct sctpasochead *lhd; 2631 2632 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2633 new_inp->hashasocidmark)]; 2634 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2635 } 2636 /* Ok. Let's restart timer. */ 2637 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2638 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2639 stcb, net); 2640 } 2641 2642 SCTP_INP_INFO_WUNLOCK(); 2643 if (new_inp->sctp_tcbhash != NULL) { 2644 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2645 new_inp->sctp_tcbhash = NULL; 2646 } 2647 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2648 /* Subset bound, so copy in the laddr list from the old_inp */ 2649 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2650 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2651 if (laddr == NULL) { 2652 /* 2653 * Gak, what can we do? This assoc is really 2654 * HOSED. We probably should send an abort 2655 * here. 2656 */ 2657 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2658 continue; 2659 } 2660 SCTP_INCR_LADDR_COUNT(); 2661 bzero(laddr, sizeof(*laddr)); 2662 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2663 laddr->ifa = oladdr->ifa; 2664 atomic_add_int(&laddr->ifa->refcount, 1); 2665 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2666 sctp_nxt_addr); 2667 new_inp->laddr_count++; 2668 } 2669 } 2670 /* 2671 * Now any running timers need to be adjusted since we really don't 2672 * care if they are running or not just blast in the new_inp into 2673 * all of them. 2674 */ 2675 2676 stcb->asoc.hb_timer.ep = (void *)new_inp; 2677 stcb->asoc.dack_timer.ep = (void *)new_inp; 2678 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2679 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2680 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2681 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2682 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2683 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2684 /* now what about the nets? */ 2685 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2686 net->pmtu_timer.ep = (void *)new_inp; 2687 net->rxt_timer.ep = (void *)new_inp; 2688 net->fr_timer.ep = (void *)new_inp; 2689 } 2690 SCTP_INP_WUNLOCK(new_inp); 2691 SCTP_INP_WUNLOCK(old_inp); 2692 } 2693 2694 2695 2696 2697 /* sctp_ifap is used to bypass normal local address validation checks */ 2698 int 2699 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2700 struct sctp_ifa *sctp_ifap, struct thread *p) 2701 { 2702 /* bind a ep to a socket address */ 2703 struct sctppcbhead *head; 2704 struct sctp_inpcb *inp, *inp_tmp; 2705 struct inpcb *ip_inp; 2706 int port_reuse_active = 0; 2707 int bindall; 2708 uint16_t lport; 2709 int error; 2710 uint32_t vrf_id; 2711 2712 lport = 0; 2713 error = 0; 2714 bindall = 1; 2715 inp = (struct sctp_inpcb *)so->so_pcb; 2716 ip_inp = (struct inpcb *)so->so_pcb; 2717 #ifdef SCTP_DEBUG 2718 if (addr) { 2719 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2720 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2721 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2722 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2723 } 2724 #endif 2725 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2726 /* already did a bind, subsequent binds NOT allowed ! */ 2727 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2728 return (EINVAL); 2729 } 2730 #ifdef INVARIANTS 2731 if (p == NULL) 2732 panic("null proc/thread"); 2733 #endif 2734 if (addr != NULL) { 2735 switch (addr->sa_family) { 2736 case AF_INET: 2737 { 2738 struct sockaddr_in *sin; 2739 2740 /* IPV6_V6ONLY socket? */ 2741 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2742 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2743 return (EINVAL); 2744 } 2745 if (addr->sa_len != sizeof(*sin)) { 2746 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2747 return (EINVAL); 2748 } 2749 sin = (struct sockaddr_in *)addr; 2750 lport = sin->sin_port; 2751 /* 2752 * For LOOPBACK the prison_local_ip4() call 2753 * will transmute the ip address to the 2754 * proper value. 2755 */ 2756 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2757 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2758 return (error); 2759 } 2760 if (sin->sin_addr.s_addr != INADDR_ANY) { 2761 bindall = 0; 2762 } 2763 break; 2764 } 2765 #ifdef INET6 2766 case AF_INET6: 2767 { 2768 /* 2769 * Only for pure IPv6 Address. (No IPv4 2770 * Mapped!) 2771 */ 2772 struct sockaddr_in6 *sin6; 2773 2774 sin6 = (struct sockaddr_in6 *)addr; 2775 2776 if (addr->sa_len != sizeof(*sin6)) { 2777 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2778 return (EINVAL); 2779 } 2780 lport = sin6->sin6_port; 2781 2782 /* 2783 * For LOOPBACK the prison_local_ip6() call 2784 * will transmute the ipv6 address to the 2785 * proper value. 2786 */ 2787 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2788 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2789 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2790 return (error); 2791 } 2792 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2793 bindall = 0; 2794 /* KAME hack: embed scopeid */ 2795 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2796 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2797 return (EINVAL); 2798 } 2799 } 2800 /* this must be cleared for ifa_ifwithaddr() */ 2801 sin6->sin6_scope_id = 0; 2802 break; 2803 } 2804 #endif 2805 default: 2806 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2807 return (EAFNOSUPPORT); 2808 } 2809 } 2810 SCTP_INP_INFO_WLOCK(); 2811 SCTP_INP_WLOCK(inp); 2812 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2813 vrf_id = inp->def_vrf_id; 2814 2815 /* increase our count due to the unlock we do */ 2816 SCTP_INP_INCR_REF(inp); 2817 if (lport) { 2818 /* 2819 * Did the caller specify a port? if so we must see if a ep 2820 * already has this one bound. 2821 */ 2822 /* got to be root to get at low ports */ 2823 if (ntohs(lport) < IPPORT_RESERVED) { 2824 if (p && (error = 2825 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2826 )) { 2827 SCTP_INP_DECR_REF(inp); 2828 SCTP_INP_WUNLOCK(inp); 2829 SCTP_INP_INFO_WUNLOCK(); 2830 return (error); 2831 } 2832 } 2833 if (p == NULL) { 2834 SCTP_INP_DECR_REF(inp); 2835 SCTP_INP_WUNLOCK(inp); 2836 SCTP_INP_INFO_WUNLOCK(); 2837 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2838 return (error); 2839 } 2840 SCTP_INP_WUNLOCK(inp); 2841 if (bindall) { 2842 vrf_id = inp->def_vrf_id; 2843 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2844 if (inp_tmp != NULL) { 2845 /* 2846 * lock guy returned and lower count note 2847 * that we are not bound so inp_tmp should 2848 * NEVER be inp. And it is this inp 2849 * (inp_tmp) that gets the reference bump, 2850 * so we must lower it. 2851 */ 2852 SCTP_INP_DECR_REF(inp_tmp); 2853 /* unlock info */ 2854 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2855 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2856 /* 2857 * Ok, must be one-2-one and 2858 * allowing port re-use 2859 */ 2860 port_reuse_active = 1; 2861 goto continue_anyway; 2862 } 2863 SCTP_INP_DECR_REF(inp); 2864 SCTP_INP_INFO_WUNLOCK(); 2865 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2866 return (EADDRINUSE); 2867 } 2868 } else { 2869 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2870 if (inp_tmp != NULL) { 2871 /* 2872 * lock guy returned and lower count note 2873 * that we are not bound so inp_tmp should 2874 * NEVER be inp. And it is this inp 2875 * (inp_tmp) that gets the reference bump, 2876 * so we must lower it. 2877 */ 2878 SCTP_INP_DECR_REF(inp_tmp); 2879 /* unlock info */ 2880 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2881 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2882 /* 2883 * Ok, must be one-2-one and 2884 * allowing port re-use 2885 */ 2886 port_reuse_active = 1; 2887 goto continue_anyway; 2888 } 2889 SCTP_INP_DECR_REF(inp); 2890 SCTP_INP_INFO_WUNLOCK(); 2891 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2892 return (EADDRINUSE); 2893 } 2894 } 2895 continue_anyway: 2896 SCTP_INP_WLOCK(inp); 2897 if (bindall) { 2898 /* verify that no lport is not used by a singleton */ 2899 if ((port_reuse_active == 0) && 2900 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2901 ) { 2902 /* Sorry someone already has this one bound */ 2903 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2904 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2905 port_reuse_active = 1; 2906 } else { 2907 SCTP_INP_DECR_REF(inp); 2908 SCTP_INP_WUNLOCK(inp); 2909 SCTP_INP_INFO_WUNLOCK(); 2910 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2911 return (EADDRINUSE); 2912 } 2913 } 2914 } 2915 } else { 2916 uint16_t first, last, candidate; 2917 uint16_t count; 2918 int done; 2919 2920 if (ip_inp->inp_flags & INP_HIGHPORT) { 2921 first = MODULE_GLOBAL(ipport_hifirstauto); 2922 last = MODULE_GLOBAL(ipport_hilastauto); 2923 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2924 if (p && (error = 2925 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2926 )) { 2927 SCTP_INP_DECR_REF(inp); 2928 SCTP_INP_WUNLOCK(inp); 2929 SCTP_INP_INFO_WUNLOCK(); 2930 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2931 return (error); 2932 } 2933 first = MODULE_GLOBAL(ipport_lowfirstauto); 2934 last = MODULE_GLOBAL(ipport_lowlastauto); 2935 } else { 2936 first = MODULE_GLOBAL(ipport_firstauto); 2937 last = MODULE_GLOBAL(ipport_lastauto); 2938 } 2939 if (first > last) { 2940 uint16_t temp; 2941 2942 temp = first; 2943 first = last; 2944 last = temp; 2945 } 2946 count = last - first + 1; /* number of candidates */ 2947 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2948 2949 done = 0; 2950 while (!done) { 2951 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2952 done = 1; 2953 } 2954 if (!done) { 2955 if (--count == 0) { 2956 SCTP_INP_DECR_REF(inp); 2957 SCTP_INP_WUNLOCK(inp); 2958 SCTP_INP_INFO_WUNLOCK(); 2959 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2960 return (EADDRINUSE); 2961 } 2962 if (candidate == last) 2963 candidate = first; 2964 else 2965 candidate = candidate + 1; 2966 } 2967 } 2968 lport = htons(candidate); 2969 } 2970 SCTP_INP_DECR_REF(inp); 2971 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2972 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2973 /* 2974 * this really should not happen. The guy did a non-blocking 2975 * bind and then did a close at the same time. 2976 */ 2977 SCTP_INP_WUNLOCK(inp); 2978 SCTP_INP_INFO_WUNLOCK(); 2979 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2980 return (EINVAL); 2981 } 2982 /* ok we look clear to give out this port, so lets setup the binding */ 2983 if (bindall) { 2984 /* binding to all addresses, so just set in the proper flags */ 2985 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2986 /* set the automatic addr changes from kernel flag */ 2987 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2988 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2989 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2990 } else { 2991 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2992 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2993 } 2994 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2995 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2996 } else { 2997 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2998 } 2999 /* 3000 * set the automatic mobility_base from kernel flag (by 3001 * micchie) 3002 */ 3003 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3004 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3005 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3006 } else { 3007 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3008 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3009 } 3010 /* 3011 * set the automatic mobility_fasthandoff from kernel flag 3012 * (by micchie) 3013 */ 3014 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3015 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3016 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3017 } else { 3018 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3019 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3020 } 3021 } else { 3022 /* 3023 * bind specific, make sure flags is off and add a new 3024 * address structure to the sctp_addr_list inside the ep 3025 * structure. 3026 * 3027 * We will need to allocate one and insert it at the head. The 3028 * socketopt call can just insert new addresses in there as 3029 * well. It will also have to do the embed scope kame hack 3030 * too (before adding). 3031 */ 3032 struct sctp_ifa *ifa; 3033 struct sockaddr_storage store_sa; 3034 3035 memset(&store_sa, 0, sizeof(store_sa)); 3036 if (addr->sa_family == AF_INET) { 3037 struct sockaddr_in *sin; 3038 3039 sin = (struct sockaddr_in *)&store_sa; 3040 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3041 sin->sin_port = 0; 3042 } else if (addr->sa_family == AF_INET6) { 3043 struct sockaddr_in6 *sin6; 3044 3045 sin6 = (struct sockaddr_in6 *)&store_sa; 3046 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3047 sin6->sin6_port = 0; 3048 } 3049 /* 3050 * first find the interface with the bound address need to 3051 * zero out the port to find the address! yuck! can't do 3052 * this earlier since need port for sctp_pcb_findep() 3053 */ 3054 if (sctp_ifap != NULL) 3055 ifa = sctp_ifap; 3056 else { 3057 /* 3058 * Note for BSD we hit here always other O/S's will 3059 * pass things in via the sctp_ifap argument 3060 * (Panda). 3061 */ 3062 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3063 vrf_id, SCTP_ADDR_NOT_LOCKED); 3064 } 3065 if (ifa == NULL) { 3066 /* Can't find an interface with that address */ 3067 SCTP_INP_WUNLOCK(inp); 3068 SCTP_INP_INFO_WUNLOCK(); 3069 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3070 return (EADDRNOTAVAIL); 3071 } 3072 if (addr->sa_family == AF_INET6) { 3073 /* GAK, more FIXME IFA lock? */ 3074 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3075 /* Can't bind a non-existent addr. */ 3076 SCTP_INP_WUNLOCK(inp); 3077 SCTP_INP_INFO_WUNLOCK(); 3078 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3079 return (EINVAL); 3080 } 3081 } 3082 /* we're not bound all */ 3083 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3084 /* allow bindx() to send ASCONF's for binding changes */ 3085 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3086 /* clear automatic addr changes from kernel flag */ 3087 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3088 3089 /* add this address to the endpoint list */ 3090 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3091 if (error != 0) { 3092 SCTP_INP_WUNLOCK(inp); 3093 SCTP_INP_INFO_WUNLOCK(); 3094 return (error); 3095 } 3096 inp->laddr_count++; 3097 } 3098 /* find the bucket */ 3099 if (port_reuse_active) { 3100 /* Put it into tcp 1-2-1 hash */ 3101 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3102 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3103 } else { 3104 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3105 } 3106 /* put it in the bucket */ 3107 LIST_INSERT_HEAD(head, inp, sctp_hash); 3108 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3109 head, ntohs(lport), port_reuse_active); 3110 /* set in the port */ 3111 inp->sctp_lport = lport; 3112 3113 /* turn off just the unbound flag */ 3114 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3115 SCTP_INP_WUNLOCK(inp); 3116 SCTP_INP_INFO_WUNLOCK(); 3117 return (0); 3118 } 3119 3120 3121 static void 3122 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3123 { 3124 struct sctp_iterator *it, *nit; 3125 3126 /* 3127 * We enter with the only the ITERATOR_LOCK in place and a write 3128 * lock on the inp_info stuff. 3129 */ 3130 it = sctp_it_ctl.cur_it; 3131 if (it && (it->vn != curvnet)) { 3132 /* Its not looking at our VNET */ 3133 return; 3134 } 3135 if (it && (it->inp == inp)) { 3136 /* 3137 * This is tricky and we hold the iterator lock, but when it 3138 * returns and gets the lock (when we release it) the 3139 * iterator will try to operate on inp. We need to stop that 3140 * from happening. But of course the iterator has a 3141 * reference on the stcb and inp. We can mark it and it will 3142 * stop. 3143 * 3144 * If its a single iterator situation, we set the end iterator 3145 * flag. Otherwise we set the iterator to go to the next 3146 * inp. 3147 * 3148 */ 3149 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3150 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3151 } else { 3152 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3153 } 3154 } 3155 /* 3156 * Now go through and remove any single reference to our inp that 3157 * may be still pending on the list 3158 */ 3159 SCTP_IPI_ITERATOR_WQ_LOCK(); 3160 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3161 if (it->vn != curvnet) { 3162 continue; 3163 } 3164 if (it->inp == inp) { 3165 /* This one points to me is it inp specific? */ 3166 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3167 /* Remove and free this one */ 3168 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3169 it, sctp_nxt_itr); 3170 if (it->function_atend != NULL) { 3171 (*it->function_atend) (it->pointer, it->val); 3172 } 3173 SCTP_FREE(it, SCTP_M_ITER); 3174 } else { 3175 it->inp = LIST_NEXT(it->inp, sctp_list); 3176 if (it->inp) { 3177 SCTP_INP_INCR_REF(it->inp); 3178 } 3179 } 3180 /* 3181 * When its put in the refcnt is incremented so decr 3182 * it 3183 */ 3184 SCTP_INP_DECR_REF(inp); 3185 } 3186 } 3187 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3188 } 3189 3190 /* release sctp_inpcb unbind the port */ 3191 void 3192 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3193 { 3194 /* 3195 * Here we free a endpoint. We must find it (if it is in the Hash 3196 * table) and remove it from there. Then we must also find it in the 3197 * overall list and remove it from there. After all removals are 3198 * complete then any timer has to be stopped. Then start the actual 3199 * freeing. a) Any local lists. b) Any associations. c) The hash of 3200 * all associations. d) finally the ep itself. 3201 */ 3202 struct sctp_pcb *m; 3203 struct sctp_tcb *asoc, *nasoc; 3204 struct sctp_laddr *laddr, *nladdr; 3205 struct inpcb *ip_pcb; 3206 struct socket *so; 3207 int being_refed = 0; 3208 struct sctp_queued_to_read *sq, *nsq; 3209 int cnt; 3210 sctp_sharedkey_t *shared_key, *nshared_key; 3211 3212 3213 #ifdef SCTP_LOG_CLOSING 3214 sctp_log_closing(inp, NULL, 0); 3215 #endif 3216 SCTP_ITERATOR_LOCK(); 3217 /* mark any iterators on the list or being processed */ 3218 sctp_iterator_inp_being_freed(inp); 3219 SCTP_ITERATOR_UNLOCK(); 3220 so = inp->sctp_socket; 3221 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3222 /* been here before.. eeks.. get out of here */ 3223 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3224 #ifdef SCTP_LOG_CLOSING 3225 sctp_log_closing(inp, NULL, 1); 3226 #endif 3227 return; 3228 } 3229 SCTP_ASOC_CREATE_LOCK(inp); 3230 SCTP_INP_INFO_WLOCK(); 3231 3232 SCTP_INP_WLOCK(inp); 3233 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3234 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3235 /* socket is gone, so no more wakeups allowed */ 3236 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3237 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3238 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3239 3240 } 3241 /* First time through we have the socket lock, after that no more. */ 3242 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3243 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3244 3245 if (inp->control) { 3246 sctp_m_freem(inp->control); 3247 inp->control = NULL; 3248 } 3249 if (inp->pkt) { 3250 sctp_m_freem(inp->pkt); 3251 inp->pkt = NULL; 3252 } 3253 m = &inp->sctp_ep; 3254 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3255 * here but I will be nice :> (i.e. 3256 * ip_pcb = ep;) */ 3257 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3258 int cnt_in_sd; 3259 3260 cnt_in_sd = 0; 3261 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3262 SCTP_TCB_LOCK(asoc); 3263 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3264 /* Skip guys being freed */ 3265 cnt_in_sd++; 3266 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3267 /* 3268 * Special case - we did not start a 3269 * kill timer on the asoc due to it 3270 * was not closed. So go ahead and 3271 * start it now. 3272 */ 3273 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3274 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3275 } 3276 SCTP_TCB_UNLOCK(asoc); 3277 continue; 3278 } 3279 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3280 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3281 (asoc->asoc.total_output_queue_size == 0)) { 3282 /* 3283 * If we have data in queue, we don't want 3284 * to just free since the app may have done, 3285 * send()/close or connect/send/close. And 3286 * it wants the data to get across first. 3287 */ 3288 /* Just abandon things in the front states */ 3289 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3290 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3291 cnt_in_sd++; 3292 } 3293 continue; 3294 } 3295 /* Disconnect the socket please */ 3296 asoc->sctp_socket = NULL; 3297 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3298 if ((asoc->asoc.size_on_reasm_queue > 0) || 3299 (asoc->asoc.control_pdapi) || 3300 (asoc->asoc.size_on_all_streams > 0) || 3301 (so && (so->so_rcv.sb_cc > 0)) 3302 ) { 3303 /* Left with Data unread */ 3304 struct mbuf *op_err; 3305 3306 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3307 0, M_DONTWAIT, 1, MT_DATA); 3308 if (op_err) { 3309 /* Fill in the user initiated abort */ 3310 struct sctp_paramhdr *ph; 3311 uint32_t *ippp; 3312 3313 SCTP_BUF_LEN(op_err) = 3314 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3315 ph = mtod(op_err, 3316 struct sctp_paramhdr *); 3317 ph->param_type = htons( 3318 SCTP_CAUSE_USER_INITIATED_ABT); 3319 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3320 ippp = (uint32_t *) (ph + 1); 3321 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3322 } 3323 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3324 #if defined(SCTP_PANIC_ON_ABORT) 3325 panic("inpcb_free does an abort"); 3326 #endif 3327 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3328 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3329 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3330 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3331 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3332 } 3333 if (sctp_free_assoc(inp, asoc, 3334 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3335 cnt_in_sd++; 3336 } 3337 continue; 3338 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3339 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3340 (asoc->asoc.stream_queue_cnt == 0) 3341 ) { 3342 if (asoc->asoc.locked_on_sending) { 3343 goto abort_anyway; 3344 } 3345 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3346 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3347 /* 3348 * there is nothing queued to send, 3349 * so I send shutdown 3350 */ 3351 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 3352 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3353 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3354 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3355 } 3356 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3357 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3358 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3359 asoc->asoc.primary_destination); 3360 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3361 asoc->asoc.primary_destination); 3362 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3363 } 3364 } else { 3365 /* mark into shutdown pending */ 3366 struct sctp_stream_queue_pending *sp; 3367 3368 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3369 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3370 asoc->asoc.primary_destination); 3371 if (asoc->asoc.locked_on_sending) { 3372 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3373 sctp_streamhead); 3374 if (sp == NULL) { 3375 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3376 asoc->asoc.locked_on_sending, 3377 asoc->asoc.locked_on_sending->stream_no); 3378 } else { 3379 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3380 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3381 } 3382 } 3383 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3384 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3385 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3386 struct mbuf *op_err; 3387 3388 abort_anyway: 3389 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3390 0, M_DONTWAIT, 1, MT_DATA); 3391 if (op_err) { 3392 /* 3393 * Fill in the user 3394 * initiated abort 3395 */ 3396 struct sctp_paramhdr *ph; 3397 uint32_t *ippp; 3398 3399 SCTP_BUF_LEN(op_err) = 3400 (sizeof(struct sctp_paramhdr) + 3401 sizeof(uint32_t)); 3402 ph = mtod(op_err, 3403 struct sctp_paramhdr *); 3404 ph->param_type = htons( 3405 SCTP_CAUSE_USER_INITIATED_ABT); 3406 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3407 ippp = (uint32_t *) (ph + 1); 3408 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3409 } 3410 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3411 #if defined(SCTP_PANIC_ON_ABORT) 3412 panic("inpcb_free does an abort"); 3413 #endif 3414 3415 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3416 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3417 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3418 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3419 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3420 } 3421 if (sctp_free_assoc(inp, asoc, 3422 SCTP_PCBFREE_NOFORCE, 3423 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3424 cnt_in_sd++; 3425 } 3426 continue; 3427 } else { 3428 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3429 } 3430 } 3431 cnt_in_sd++; 3432 SCTP_TCB_UNLOCK(asoc); 3433 } 3434 /* now is there some left in our SHUTDOWN state? */ 3435 if (cnt_in_sd) { 3436 #ifdef SCTP_LOG_CLOSING 3437 sctp_log_closing(inp, NULL, 2); 3438 #endif 3439 inp->sctp_socket = NULL; 3440 SCTP_INP_WUNLOCK(inp); 3441 SCTP_ASOC_CREATE_UNLOCK(inp); 3442 SCTP_INP_INFO_WUNLOCK(); 3443 return; 3444 } 3445 } 3446 inp->sctp_socket = NULL; 3447 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3448 SCTP_PCB_FLAGS_UNBOUND) { 3449 /* 3450 * ok, this guy has been bound. It's port is somewhere in 3451 * the SCTP_BASE_INFO(hash table). Remove it! 3452 */ 3453 LIST_REMOVE(inp, sctp_hash); 3454 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3455 } 3456 /* 3457 * If there is a timer running to kill us, forget it, since it may 3458 * have a contest on the INP lock.. which would cause us to die ... 3459 */ 3460 cnt = 0; 3461 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3462 SCTP_TCB_LOCK(asoc); 3463 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3464 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3465 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3466 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3467 } 3468 cnt++; 3469 SCTP_TCB_UNLOCK(asoc); 3470 continue; 3471 } 3472 /* Free associations that are NOT killing us */ 3473 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3474 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3475 struct mbuf *op_err; 3476 uint32_t *ippp; 3477 3478 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3479 0, M_DONTWAIT, 1, MT_DATA); 3480 if (op_err) { 3481 /* Fill in the user initiated abort */ 3482 struct sctp_paramhdr *ph; 3483 3484 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3485 sizeof(uint32_t)); 3486 ph = mtod(op_err, struct sctp_paramhdr *); 3487 ph->param_type = htons( 3488 SCTP_CAUSE_USER_INITIATED_ABT); 3489 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3490 ippp = (uint32_t *) (ph + 1); 3491 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3492 3493 } 3494 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3495 #if defined(SCTP_PANIC_ON_ABORT) 3496 panic("inpcb_free does an abort"); 3497 #endif 3498 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3499 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3500 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3501 cnt++; 3502 SCTP_TCB_UNLOCK(asoc); 3503 continue; 3504 } 3505 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3506 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3507 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3508 } 3509 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3510 cnt++; 3511 } 3512 } 3513 if (cnt) { 3514 /* Ok we have someone out there that will kill us */ 3515 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3516 #ifdef SCTP_LOG_CLOSING 3517 sctp_log_closing(inp, NULL, 3); 3518 #endif 3519 SCTP_INP_WUNLOCK(inp); 3520 SCTP_ASOC_CREATE_UNLOCK(inp); 3521 SCTP_INP_INFO_WUNLOCK(); 3522 return; 3523 } 3524 if (SCTP_INP_LOCK_CONTENDED(inp)) 3525 being_refed++; 3526 if (SCTP_INP_READ_CONTENDED(inp)) 3527 being_refed++; 3528 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3529 being_refed++; 3530 3531 if ((inp->refcount) || 3532 (being_refed) || 3533 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3534 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3535 #ifdef SCTP_LOG_CLOSING 3536 sctp_log_closing(inp, NULL, 4); 3537 #endif 3538 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3539 SCTP_INP_WUNLOCK(inp); 3540 SCTP_ASOC_CREATE_UNLOCK(inp); 3541 SCTP_INP_INFO_WUNLOCK(); 3542 return; 3543 } 3544 inp->sctp_ep.signature_change.type = 0; 3545 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3546 /* 3547 * Remove it from the list .. last thing we need a lock for. 3548 */ 3549 LIST_REMOVE(inp, sctp_list); 3550 SCTP_INP_WUNLOCK(inp); 3551 SCTP_ASOC_CREATE_UNLOCK(inp); 3552 SCTP_INP_INFO_WUNLOCK(); 3553 /* 3554 * Now we release all locks. Since this INP cannot be found anymore 3555 * except possibly by the kill timer that might be running. We call 3556 * the drain function here. It should hit the case were it sees the 3557 * ACTIVE flag cleared and exit out freeing us to proceed and 3558 * destroy everything. 3559 */ 3560 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3561 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3562 } else { 3563 /* Probably un-needed */ 3564 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3565 } 3566 3567 #ifdef SCTP_LOG_CLOSING 3568 sctp_log_closing(inp, NULL, 5); 3569 #endif 3570 3571 3572 if ((inp->sctp_asocidhash) != NULL) { 3573 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3574 inp->sctp_asocidhash = NULL; 3575 } 3576 /* sa_ignore FREED_MEMORY */ 3577 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3578 /* Its only abandoned if it had data left */ 3579 if (sq->length) 3580 SCTP_STAT_INCR(sctps_left_abandon); 3581 3582 TAILQ_REMOVE(&inp->read_queue, sq, next); 3583 sctp_free_remote_addr(sq->whoFrom); 3584 if (so) 3585 so->so_rcv.sb_cc -= sq->length; 3586 if (sq->data) { 3587 sctp_m_freem(sq->data); 3588 sq->data = NULL; 3589 } 3590 /* 3591 * no need to free the net count, since at this point all 3592 * assoc's are gone. 3593 */ 3594 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3595 SCTP_DECR_READQ_COUNT(); 3596 } 3597 /* Now the sctp_pcb things */ 3598 /* 3599 * free each asoc if it is not already closed/free. we can't use the 3600 * macro here since le_next will get freed as part of the 3601 * sctp_free_assoc() call. 3602 */ 3603 cnt = 0; 3604 if (so) { 3605 #ifdef IPSEC 3606 ipsec_delete_pcbpolicy(ip_pcb); 3607 #endif /* IPSEC */ 3608 3609 /* Unlocks not needed since the socket is gone now */ 3610 } 3611 if (ip_pcb->inp_options) { 3612 (void)sctp_m_free(ip_pcb->inp_options); 3613 ip_pcb->inp_options = 0; 3614 } 3615 if (ip_pcb->inp_moptions) { 3616 inp_freemoptions(ip_pcb->inp_moptions); 3617 ip_pcb->inp_moptions = 0; 3618 } 3619 #ifdef INET6 3620 if (ip_pcb->inp_vflag & INP_IPV6) { 3621 struct in6pcb *in6p; 3622 3623 in6p = (struct in6pcb *)inp; 3624 ip6_freepcbopts(in6p->in6p_outputopts); 3625 } 3626 #endif /* INET6 */ 3627 ip_pcb->inp_vflag = 0; 3628 /* free up authentication fields */ 3629 if (inp->sctp_ep.local_auth_chunks != NULL) 3630 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3631 if (inp->sctp_ep.local_hmacs != NULL) 3632 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3633 3634 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3635 LIST_REMOVE(shared_key, next); 3636 sctp_free_sharedkey(shared_key); 3637 /* sa_ignore FREED_MEMORY */ 3638 } 3639 3640 /* 3641 * if we have an address list the following will free the list of 3642 * ifaddr's that are set into this ep. Again macro limitations here, 3643 * since the LIST_FOREACH could be a bad idea. 3644 */ 3645 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3646 sctp_remove_laddr(laddr); 3647 } 3648 3649 #ifdef SCTP_TRACK_FREED_ASOCS 3650 /* TEMP CODE */ 3651 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3652 LIST_REMOVE(asoc, sctp_tcblist); 3653 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3654 SCTP_DECR_ASOC_COUNT(); 3655 } 3656 /* *** END TEMP CODE *** */ 3657 #endif 3658 /* Now lets see about freeing the EP hash table. */ 3659 if (inp->sctp_tcbhash != NULL) { 3660 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3661 inp->sctp_tcbhash = NULL; 3662 } 3663 /* Now we must put the ep memory back into the zone pool */ 3664 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3665 SCTP_INP_LOCK_DESTROY(inp); 3666 SCTP_INP_READ_DESTROY(inp); 3667 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3668 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3669 SCTP_DECR_EP_COUNT(); 3670 } 3671 3672 3673 struct sctp_nets * 3674 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3675 { 3676 struct sctp_nets *net; 3677 3678 /* locate the address */ 3679 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3680 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3681 return (net); 3682 } 3683 return (NULL); 3684 } 3685 3686 3687 int 3688 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3689 { 3690 struct sctp_ifa *sctp_ifa; 3691 3692 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3693 if (sctp_ifa) { 3694 return (1); 3695 } else { 3696 return (0); 3697 } 3698 } 3699 3700 /* 3701 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3702 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3703 * stats of stuff. 3704 */ 3705 int 3706 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3707 int set_scope, int from) 3708 { 3709 /* 3710 * The following is redundant to the same lines in the 3711 * sctp_aloc_assoc() but is needed since others call the add address 3712 * function 3713 */ 3714 struct sctp_nets *net, *netfirst; 3715 int addr_inscope; 3716 3717 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3718 from); 3719 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3720 3721 netfirst = sctp_findnet(stcb, newaddr); 3722 if (netfirst) { 3723 /* 3724 * Lie and return ok, we don't want to make the association 3725 * go away for this behavior. It will happen in the TCP 3726 * model in a connected socket. It does not reach the hash 3727 * table until after the association is built so it can't be 3728 * found. Mark as reachable, since the initial creation will 3729 * have been cleared and the NOT_IN_ASSOC flag will have 3730 * been added... and we don't want to end up removing it 3731 * back out. 3732 */ 3733 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3734 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3735 SCTP_ADDR_UNCONFIRMED); 3736 } else { 3737 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3738 } 3739 3740 return (0); 3741 } 3742 addr_inscope = 1; 3743 if (newaddr->sa_family == AF_INET) { 3744 struct sockaddr_in *sin; 3745 3746 sin = (struct sockaddr_in *)newaddr; 3747 if (sin->sin_addr.s_addr == 0) { 3748 /* Invalid address */ 3749 return (-1); 3750 } 3751 /* zero out the bzero area */ 3752 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3753 3754 /* assure len is set */ 3755 sin->sin_len = sizeof(struct sockaddr_in); 3756 if (set_scope) { 3757 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3758 stcb->ipv4_local_scope = 1; 3759 #else 3760 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3761 stcb->asoc.ipv4_local_scope = 1; 3762 } 3763 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3764 } else { 3765 /* Validate the address is in scope */ 3766 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3767 (stcb->asoc.ipv4_local_scope == 0)) { 3768 addr_inscope = 0; 3769 } 3770 } 3771 #ifdef INET6 3772 } else if (newaddr->sa_family == AF_INET6) { 3773 struct sockaddr_in6 *sin6; 3774 3775 sin6 = (struct sockaddr_in6 *)newaddr; 3776 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3777 /* Invalid address */ 3778 return (-1); 3779 } 3780 /* assure len is set */ 3781 sin6->sin6_len = sizeof(struct sockaddr_in6); 3782 if (set_scope) { 3783 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3784 stcb->asoc.loopback_scope = 1; 3785 stcb->asoc.local_scope = 0; 3786 stcb->asoc.ipv4_local_scope = 1; 3787 stcb->asoc.site_scope = 1; 3788 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3789 /* 3790 * If the new destination is a LINK_LOCAL we 3791 * must have common site scope. Don't set 3792 * the local scope since we may not share 3793 * all links, only loopback can do this. 3794 * Links on the local network would also be 3795 * on our private network for v4 too. 3796 */ 3797 stcb->asoc.ipv4_local_scope = 1; 3798 stcb->asoc.site_scope = 1; 3799 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3800 /* 3801 * If the new destination is SITE_LOCAL then 3802 * we must have site scope in common. 3803 */ 3804 stcb->asoc.site_scope = 1; 3805 } 3806 } else { 3807 /* Validate the address is in scope */ 3808 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3809 (stcb->asoc.loopback_scope == 0)) { 3810 addr_inscope = 0; 3811 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3812 (stcb->asoc.local_scope == 0)) { 3813 addr_inscope = 0; 3814 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3815 (stcb->asoc.site_scope == 0)) { 3816 addr_inscope = 0; 3817 } 3818 } 3819 #endif 3820 } else { 3821 /* not supported family type */ 3822 return (-1); 3823 } 3824 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3825 if (net == NULL) { 3826 return (-1); 3827 } 3828 SCTP_INCR_RADDR_COUNT(); 3829 bzero(net, sizeof(*net)); 3830 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3831 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3832 if (newaddr->sa_family == AF_INET) { 3833 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3834 } else if (newaddr->sa_family == AF_INET6) { 3835 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3836 } 3837 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3838 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3839 stcb->asoc.loopback_scope = 1; 3840 stcb->asoc.ipv4_local_scope = 1; 3841 stcb->asoc.local_scope = 0; 3842 stcb->asoc.site_scope = 1; 3843 addr_inscope = 1; 3844 } 3845 net->failure_threshold = stcb->asoc.def_net_failure; 3846 if (addr_inscope == 0) { 3847 net->dest_state = (SCTP_ADDR_REACHABLE | 3848 SCTP_ADDR_OUT_OF_SCOPE); 3849 } else { 3850 if (from == SCTP_ADDR_IS_CONFIRMED) 3851 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3852 net->dest_state = SCTP_ADDR_REACHABLE; 3853 else 3854 net->dest_state = SCTP_ADDR_REACHABLE | 3855 SCTP_ADDR_UNCONFIRMED; 3856 } 3857 /* 3858 * We set this to 0, the timer code knows that this means its an 3859 * initial value 3860 */ 3861 net->RTO = 0; 3862 net->RTO_measured = 0; 3863 stcb->asoc.numnets++; 3864 *(&net->ref_count) = 1; 3865 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3866 net->tos_flowlabel = 0; 3867 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 3868 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 3869 } else { 3870 net->port = 0; 3871 } 3872 #ifdef INET 3873 if (newaddr->sa_family == AF_INET) 3874 net->tos_flowlabel = stcb->asoc.default_tos; 3875 #endif 3876 #ifdef INET6 3877 if (newaddr->sa_family == AF_INET6) 3878 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3879 #endif 3880 /* Init the timer structure */ 3881 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3882 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3883 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3884 3885 /* Now generate a route for this guy */ 3886 #ifdef INET6 3887 /* KAME hack: embed scopeid */ 3888 if (newaddr->sa_family == AF_INET6) { 3889 struct sockaddr_in6 *sin6; 3890 3891 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3892 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3893 sin6->sin6_scope_id = 0; 3894 } 3895 #endif 3896 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3897 3898 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3899 /* Get source address */ 3900 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3901 stcb, 3902 (sctp_route_t *) & net->ro, 3903 net, 3904 0, 3905 stcb->asoc.vrf_id); 3906 /* Now get the interface MTU */ 3907 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3908 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3909 } else { 3910 net->mtu = 0; 3911 } 3912 if (net->mtu == 0) { 3913 /* Huh ?? */ 3914 net->mtu = SCTP_DEFAULT_MTU; 3915 } else { 3916 uint32_t rmtu; 3917 3918 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3919 if (rmtu == 0) { 3920 /* 3921 * Start things off to match mtu of 3922 * interface please. 3923 */ 3924 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3925 net->ro.ro_rt, net->mtu); 3926 } else { 3927 /* 3928 * we take the route mtu over the interface, 3929 * since the route may be leading out the 3930 * loopback, or a different interface. 3931 */ 3932 net->mtu = rmtu; 3933 } 3934 } 3935 if (from == SCTP_ALLOC_ASOC) { 3936 stcb->asoc.smallest_mtu = net->mtu; 3937 } 3938 } else { 3939 net->mtu = stcb->asoc.smallest_mtu; 3940 } 3941 #ifdef INET6 3942 if (newaddr->sa_family == AF_INET6) { 3943 struct sockaddr_in6 *sin6; 3944 3945 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3946 (void)sa6_recoverscope(sin6); 3947 } 3948 #endif 3949 if (net->port) { 3950 net->mtu -= sizeof(struct udphdr); 3951 } 3952 if (stcb->asoc.smallest_mtu > net->mtu) { 3953 stcb->asoc.smallest_mtu = net->mtu; 3954 } 3955 /* JRS - Use the congestion control given in the CC module */ 3956 stcb->asoc.cc_functions.sctp_set_initial_cc_param(stcb, net); 3957 3958 /* 3959 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3960 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3961 */ 3962 net->find_pseudo_cumack = 1; 3963 net->find_rtx_pseudo_cumack = 1; 3964 net->src_addr_selected = 0; 3965 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3966 if (net->ro.ro_rt == NULL) { 3967 /* Since we have no route put it at the back */ 3968 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3969 } else if (netfirst == NULL) { 3970 /* We are the first one in the pool. */ 3971 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3972 } else if (netfirst->ro.ro_rt == NULL) { 3973 /* 3974 * First one has NO route. Place this one ahead of the first 3975 * one. 3976 */ 3977 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3978 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3979 /* 3980 * This one has a different interface than the one at the 3981 * top of the list. Place it ahead. 3982 */ 3983 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3984 } else { 3985 /* 3986 * Ok we have the same interface as the first one. Move 3987 * forward until we find either a) one with a NULL route... 3988 * insert ahead of that b) one with a different ifp.. insert 3989 * after that. c) end of the list.. insert at the tail. 3990 */ 3991 struct sctp_nets *netlook; 3992 3993 do { 3994 netlook = TAILQ_NEXT(netfirst, sctp_next); 3995 if (netlook == NULL) { 3996 /* End of the list */ 3997 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3998 break; 3999 } else if (netlook->ro.ro_rt == NULL) { 4000 /* next one has NO route */ 4001 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4002 break; 4003 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4004 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4005 net, sctp_next); 4006 break; 4007 } 4008 /* Shift forward */ 4009 netfirst = netlook; 4010 } while (netlook != NULL); 4011 } 4012 4013 /* got to have a primary set */ 4014 if (stcb->asoc.primary_destination == 0) { 4015 stcb->asoc.primary_destination = net; 4016 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4017 (net->ro.ro_rt) && 4018 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4019 /* No route to current primary adopt new primary */ 4020 stcb->asoc.primary_destination = net; 4021 } 4022 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 4023 net); 4024 /* Validate primary is first */ 4025 net = TAILQ_FIRST(&stcb->asoc.nets); 4026 if ((net != stcb->asoc.primary_destination) && 4027 (stcb->asoc.primary_destination)) { 4028 /* 4029 * first one on the list is NOT the primary sctp_cmpaddr() 4030 * is much more efficient if the primary is the first on the 4031 * list, make it so. 4032 */ 4033 TAILQ_REMOVE(&stcb->asoc.nets, 4034 stcb->asoc.primary_destination, sctp_next); 4035 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4036 stcb->asoc.primary_destination, sctp_next); 4037 } 4038 return (0); 4039 } 4040 4041 4042 static uint32_t 4043 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4044 { 4045 uint32_t id; 4046 struct sctpasochead *head; 4047 struct sctp_tcb *lstcb; 4048 4049 SCTP_INP_WLOCK(inp); 4050 try_again: 4051 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4052 /* TSNH */ 4053 SCTP_INP_WUNLOCK(inp); 4054 return (0); 4055 } 4056 /* 4057 * We don't allow assoc id to be 0, this is needed otherwise if the 4058 * id were to wrap we would have issues with some socket options. 4059 */ 4060 if (inp->sctp_associd_counter == 0) { 4061 inp->sctp_associd_counter++; 4062 } 4063 id = inp->sctp_associd_counter; 4064 inp->sctp_associd_counter++; 4065 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4066 if (lstcb) { 4067 goto try_again; 4068 } 4069 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4070 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4071 stcb->asoc.in_asocid_hash = 1; 4072 SCTP_INP_WUNLOCK(inp); 4073 return id; 4074 } 4075 4076 /* 4077 * allocate an association and add it to the endpoint. The caller must be 4078 * careful to add all additional addresses once they are know right away or 4079 * else the assoc will be may experience a blackout scenario. 4080 */ 4081 struct sctp_tcb * 4082 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4083 int *error, uint32_t override_tag, uint32_t vrf_id, 4084 struct thread *p 4085 ) 4086 { 4087 /* note the p argument is only valid in unbound sockets */ 4088 4089 struct sctp_tcb *stcb; 4090 struct sctp_association *asoc; 4091 struct sctpasochead *head; 4092 uint16_t rport; 4093 int err; 4094 4095 /* 4096 * Assumption made here: Caller has done a 4097 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4098 * address does not exist already. 4099 */ 4100 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4101 /* Hit max assoc, sorry no more */ 4102 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4103 *error = ENOBUFS; 4104 return (NULL); 4105 } 4106 if (firstaddr == NULL) { 4107 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4108 *error = EINVAL; 4109 return (NULL); 4110 } 4111 SCTP_INP_RLOCK(inp); 4112 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4113 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4114 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4115 /* 4116 * If its in the TCP pool, its NOT allowed to create an 4117 * association. The parent listener needs to call 4118 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4119 * off, or connected one does this.. its an error. 4120 */ 4121 SCTP_INP_RUNLOCK(inp); 4122 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4123 *error = EINVAL; 4124 return (NULL); 4125 } 4126 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4127 #ifdef SCTP_DEBUG 4128 if (firstaddr) { 4129 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4130 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4131 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4132 } else { 4133 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4134 } 4135 #endif /* SCTP_DEBUG */ 4136 if (firstaddr->sa_family == AF_INET) { 4137 struct sockaddr_in *sin; 4138 4139 sin = (struct sockaddr_in *)firstaddr; 4140 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 4141 /* Invalid address */ 4142 SCTP_INP_RUNLOCK(inp); 4143 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4144 *error = EINVAL; 4145 return (NULL); 4146 } 4147 rport = sin->sin_port; 4148 } else if (firstaddr->sa_family == AF_INET6) { 4149 struct sockaddr_in6 *sin6; 4150 4151 sin6 = (struct sockaddr_in6 *)firstaddr; 4152 if ((sin6->sin6_port == 0) || 4153 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 4154 /* Invalid address */ 4155 SCTP_INP_RUNLOCK(inp); 4156 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4157 *error = EINVAL; 4158 return (NULL); 4159 } 4160 rport = sin6->sin6_port; 4161 } else { 4162 /* not supported family type */ 4163 SCTP_INP_RUNLOCK(inp); 4164 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4165 *error = EINVAL; 4166 return (NULL); 4167 } 4168 SCTP_INP_RUNLOCK(inp); 4169 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4170 /* 4171 * If you have not performed a bind, then we need to do the 4172 * ephemeral bind for you. 4173 */ 4174 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4175 (struct sockaddr *)NULL, 4176 (struct sctp_ifa *)NULL, 4177 p 4178 ))) { 4179 /* bind error, probably perm */ 4180 *error = err; 4181 return (NULL); 4182 } 4183 } 4184 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4185 if (stcb == NULL) { 4186 /* out of memory? */ 4187 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4188 *error = ENOMEM; 4189 return (NULL); 4190 } 4191 SCTP_INCR_ASOC_COUNT(); 4192 4193 bzero(stcb, sizeof(*stcb)); 4194 asoc = &stcb->asoc; 4195 4196 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4197 SCTP_TCB_LOCK_INIT(stcb); 4198 SCTP_TCB_SEND_LOCK_INIT(stcb); 4199 stcb->rport = rport; 4200 /* setup back pointer's */ 4201 stcb->sctp_ep = inp; 4202 stcb->sctp_socket = inp->sctp_socket; 4203 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4204 /* failed */ 4205 SCTP_TCB_LOCK_DESTROY(stcb); 4206 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4207 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4208 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4209 SCTP_DECR_ASOC_COUNT(); 4210 *error = err; 4211 return (NULL); 4212 } 4213 /* and the port */ 4214 SCTP_INP_INFO_WLOCK(); 4215 SCTP_INP_WLOCK(inp); 4216 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4217 /* inpcb freed while alloc going on */ 4218 SCTP_TCB_LOCK_DESTROY(stcb); 4219 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4220 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4221 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4222 SCTP_INP_WUNLOCK(inp); 4223 SCTP_INP_INFO_WUNLOCK(); 4224 SCTP_DECR_ASOC_COUNT(); 4225 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4226 *error = EINVAL; 4227 return (NULL); 4228 } 4229 SCTP_TCB_LOCK(stcb); 4230 4231 /* now that my_vtag is set, add it to the hash */ 4232 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4233 /* put it in the bucket in the vtag hash of assoc's for the system */ 4234 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4235 SCTP_INP_INFO_WUNLOCK(); 4236 4237 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4238 /* failure.. memory error? */ 4239 if (asoc->strmout) { 4240 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4241 asoc->strmout = NULL; 4242 } 4243 if (asoc->mapping_array) { 4244 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4245 asoc->mapping_array = NULL; 4246 } 4247 if (asoc->nr_mapping_array) { 4248 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4249 asoc->nr_mapping_array = NULL; 4250 } 4251 SCTP_DECR_ASOC_COUNT(); 4252 SCTP_TCB_LOCK_DESTROY(stcb); 4253 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4254 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4255 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4256 SCTP_INP_WUNLOCK(inp); 4257 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4258 *error = ENOBUFS; 4259 return (NULL); 4260 } 4261 /* Init all the timers */ 4262 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 4263 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4264 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4265 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4266 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4267 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4268 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4269 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4270 4271 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4272 /* now file the port under the hash as well */ 4273 if (inp->sctp_tcbhash != NULL) { 4274 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4275 inp->sctp_hashmark)]; 4276 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4277 } 4278 SCTP_INP_WUNLOCK(inp); 4279 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4280 return (stcb); 4281 } 4282 4283 4284 void 4285 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4286 { 4287 struct sctp_association *asoc; 4288 4289 asoc = &stcb->asoc; 4290 asoc->numnets--; 4291 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4292 if (net == asoc->primary_destination) { 4293 /* Reset primary */ 4294 struct sctp_nets *lnet; 4295 4296 lnet = TAILQ_FIRST(&asoc->nets); 4297 /* 4298 * Mobility adaptation Ideally, if deleted destination is 4299 * the primary, it becomes a fast retransmission trigger by 4300 * the subsequent SET PRIMARY. (by micchie) 4301 */ 4302 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4303 SCTP_MOBILITY_BASE) || 4304 sctp_is_mobility_feature_on(stcb->sctp_ep, 4305 SCTP_MOBILITY_FASTHANDOFF)) { 4306 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4307 if (asoc->deleted_primary != NULL) { 4308 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4309 goto out; 4310 } 4311 asoc->deleted_primary = net; 4312 atomic_add_int(&net->ref_count, 1); 4313 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4314 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4315 sctp_mobility_feature_on(stcb->sctp_ep, 4316 SCTP_MOBILITY_PRIM_DELETED); 4317 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4318 stcb->sctp_ep, stcb, NULL); 4319 } 4320 out: 4321 /* Try to find a confirmed primary */ 4322 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4323 } 4324 if (net == asoc->last_data_chunk_from) { 4325 /* Reset primary */ 4326 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4327 } 4328 if (net == asoc->last_control_chunk_from) { 4329 /* Clear net */ 4330 asoc->last_control_chunk_from = NULL; 4331 } 4332 sctp_free_remote_addr(net); 4333 } 4334 4335 /* 4336 * remove a remote endpoint address from an association, it will fail if the 4337 * address does not exist. 4338 */ 4339 int 4340 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4341 { 4342 /* 4343 * Here we need to remove a remote address. This is quite simple, we 4344 * first find it in the list of address for the association 4345 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4346 * on that item. Note we do not allow it to be removed if there are 4347 * no other addresses. 4348 */ 4349 struct sctp_association *asoc; 4350 struct sctp_nets *net, *nnet; 4351 4352 asoc = &stcb->asoc; 4353 4354 /* locate the address */ 4355 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4356 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4357 continue; 4358 } 4359 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4360 remaddr)) { 4361 /* we found the guy */ 4362 if (asoc->numnets < 2) { 4363 /* Must have at LEAST two remote addresses */ 4364 return (-1); 4365 } else { 4366 sctp_remove_net(stcb, net); 4367 return (0); 4368 } 4369 } 4370 } 4371 /* not found. */ 4372 return (-2); 4373 } 4374 4375 void 4376 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4377 { 4378 struct sctpvtaghead *chain; 4379 struct sctp_tagblock *twait_block; 4380 int found = 0; 4381 int i; 4382 4383 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4384 if (!LIST_EMPTY(chain)) { 4385 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4386 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4387 if ((twait_block->vtag_block[i].v_tag == tag) && 4388 (twait_block->vtag_block[i].lport == lport) && 4389 (twait_block->vtag_block[i].rport == rport)) { 4390 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4391 twait_block->vtag_block[i].v_tag = 0; 4392 twait_block->vtag_block[i].lport = 0; 4393 twait_block->vtag_block[i].rport = 0; 4394 found = 1; 4395 break; 4396 } 4397 } 4398 if (found) 4399 break; 4400 } 4401 } 4402 } 4403 4404 int 4405 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4406 { 4407 struct sctpvtaghead *chain; 4408 struct sctp_tagblock *twait_block; 4409 int found = 0; 4410 int i; 4411 4412 SCTP_INP_INFO_WLOCK(); 4413 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4414 if (!LIST_EMPTY(chain)) { 4415 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4416 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4417 if ((twait_block->vtag_block[i].v_tag == tag) && 4418 (twait_block->vtag_block[i].lport == lport) && 4419 (twait_block->vtag_block[i].rport == rport)) { 4420 found = 1; 4421 break; 4422 } 4423 } 4424 if (found) 4425 break; 4426 } 4427 } 4428 SCTP_INP_INFO_WUNLOCK(); 4429 return (found); 4430 } 4431 4432 4433 void 4434 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4435 { 4436 struct sctpvtaghead *chain; 4437 struct sctp_tagblock *twait_block; 4438 struct timeval now; 4439 int set, i; 4440 4441 if (time == 0) { 4442 /* Its disabled */ 4443 return; 4444 } 4445 (void)SCTP_GETTIME_TIMEVAL(&now); 4446 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4447 set = 0; 4448 if (!LIST_EMPTY(chain)) { 4449 /* Block(s) present, lets find space, and expire on the fly */ 4450 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4451 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4452 if ((twait_block->vtag_block[i].v_tag == 0) && 4453 !set) { 4454 twait_block->vtag_block[i].tv_sec_at_expire = 4455 now.tv_sec + time; 4456 twait_block->vtag_block[i].v_tag = tag; 4457 twait_block->vtag_block[i].lport = lport; 4458 twait_block->vtag_block[i].rport = rport; 4459 set = 1; 4460 } else if ((twait_block->vtag_block[i].v_tag) && 4461 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4462 /* Audit expires this guy */ 4463 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4464 twait_block->vtag_block[i].v_tag = 0; 4465 twait_block->vtag_block[i].lport = 0; 4466 twait_block->vtag_block[i].rport = 0; 4467 if (set == 0) { 4468 /* Reuse it for my new tag */ 4469 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4470 twait_block->vtag_block[i].v_tag = tag; 4471 twait_block->vtag_block[i].lport = lport; 4472 twait_block->vtag_block[i].rport = rport; 4473 set = 1; 4474 } 4475 } 4476 } 4477 if (set) { 4478 /* 4479 * We only do up to the block where we can 4480 * place our tag for audits 4481 */ 4482 break; 4483 } 4484 } 4485 } 4486 /* Need to add a new block to chain */ 4487 if (!set) { 4488 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4489 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4490 if (twait_block == NULL) { 4491 #ifdef INVARIANTS 4492 panic("Can not alloc tagblock"); 4493 #endif 4494 return; 4495 } 4496 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4497 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4498 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4499 twait_block->vtag_block[0].v_tag = tag; 4500 twait_block->vtag_block[0].lport = lport; 4501 twait_block->vtag_block[0].rport = rport; 4502 } 4503 } 4504 4505 4506 4507 /*- 4508 * Free the association after un-hashing the remote port. This 4509 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4510 * expect that the input to this function IS a locked TCB. 4511 * It will return 0, if it did NOT destroy the association (instead 4512 * it unlocks it. It will return NON-zero if it either destroyed the 4513 * association OR the association is already destroyed. 4514 */ 4515 int 4516 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4517 { 4518 int i; 4519 struct sctp_association *asoc; 4520 struct sctp_nets *net, *nnet; 4521 struct sctp_laddr *laddr, *naddr; 4522 struct sctp_tmit_chunk *chk, *nchk; 4523 struct sctp_asconf_addr *aparam, *naparam; 4524 struct sctp_asconf_ack *aack, *naack; 4525 struct sctp_stream_reset_list *strrst, *nstrrst; 4526 struct sctp_queued_to_read *sq, *nsq; 4527 struct sctp_stream_queue_pending *sp, *nsp; 4528 sctp_sharedkey_t *shared_key, *nshared_key; 4529 struct socket *so; 4530 4531 /* first, lets purge the entry from the hash table. */ 4532 4533 #ifdef SCTP_LOG_CLOSING 4534 sctp_log_closing(inp, stcb, 6); 4535 #endif 4536 if (stcb->asoc.state == 0) { 4537 #ifdef SCTP_LOG_CLOSING 4538 sctp_log_closing(inp, NULL, 7); 4539 #endif 4540 /* there is no asoc, really TSNH :-0 */ 4541 return (1); 4542 } 4543 /* TEMP CODE */ 4544 if (stcb->freed_from_where == 0) { 4545 /* Only record the first place free happened from */ 4546 stcb->freed_from_where = from_location; 4547 } 4548 /* TEMP CODE */ 4549 4550 asoc = &stcb->asoc; 4551 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4552 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4553 /* nothing around */ 4554 so = NULL; 4555 else 4556 so = inp->sctp_socket; 4557 4558 /* 4559 * We used timer based freeing if a reader or writer is in the way. 4560 * So we first check if we are actually being called from a timer, 4561 * if so we abort early if a reader or writer is still in the way. 4562 */ 4563 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4564 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4565 /* 4566 * is it the timer driving us? if so are the reader/writers 4567 * gone? 4568 */ 4569 if (stcb->asoc.refcnt) { 4570 /* nope, reader or writer in the way */ 4571 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4572 /* no asoc destroyed */ 4573 SCTP_TCB_UNLOCK(stcb); 4574 #ifdef SCTP_LOG_CLOSING 4575 sctp_log_closing(inp, stcb, 8); 4576 #endif 4577 return (0); 4578 } 4579 } 4580 /* now clean up any other timers */ 4581 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4582 asoc->hb_timer.self = NULL; 4583 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4584 asoc->dack_timer.self = NULL; 4585 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4586 /*- 4587 * For stream reset we don't blast this unless 4588 * it is a str-reset timer, it might be the 4589 * free-asoc timer which we DON'T want to 4590 * disturb. 4591 */ 4592 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4593 asoc->strreset_timer.self = NULL; 4594 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4595 asoc->asconf_timer.self = NULL; 4596 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4597 asoc->autoclose_timer.self = NULL; 4598 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4599 asoc->shut_guard_timer.self = NULL; 4600 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4601 asoc->delayed_event_timer.self = NULL; 4602 /* Mobility adaptation */ 4603 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4604 asoc->delete_prim_timer.self = NULL; 4605 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4606 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4607 net->fr_timer.self = NULL; 4608 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4609 net->rxt_timer.self = NULL; 4610 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4611 net->pmtu_timer.self = NULL; 4612 } 4613 /* Now the read queue needs to be cleaned up (only once) */ 4614 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4615 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4616 SCTP_INP_READ_LOCK(inp); 4617 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4618 if (sq->stcb == stcb) { 4619 sq->do_not_ref_stcb = 1; 4620 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4621 /* 4622 * If there is no end, there never will be 4623 * now. 4624 */ 4625 if (sq->end_added == 0) { 4626 /* Held for PD-API clear that. */ 4627 sq->pdapi_aborted = 1; 4628 sq->held_length = 0; 4629 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4630 /* 4631 * Need to add a PD-API 4632 * aborted indication. 4633 * Setting the control_pdapi 4634 * assures that it will be 4635 * added right after this 4636 * msg. 4637 */ 4638 uint32_t strseq; 4639 4640 stcb->asoc.control_pdapi = sq; 4641 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4642 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4643 stcb, 4644 SCTP_PARTIAL_DELIVERY_ABORTED, 4645 (void *)&strseq, 4646 SCTP_SO_LOCKED); 4647 stcb->asoc.control_pdapi = NULL; 4648 } 4649 } 4650 /* Add an end to wake them */ 4651 sq->end_added = 1; 4652 } 4653 } 4654 SCTP_INP_READ_UNLOCK(inp); 4655 if (stcb->block_entry) { 4656 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4657 stcb->block_entry->error = ECONNRESET; 4658 stcb->block_entry = NULL; 4659 } 4660 } 4661 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4662 /* 4663 * Someone holds a reference OR the socket is unaccepted 4664 * yet. 4665 */ 4666 if ((stcb->asoc.refcnt) || 4667 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4668 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4669 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4670 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4671 } 4672 SCTP_TCB_UNLOCK(stcb); 4673 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4674 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4675 /* nothing around */ 4676 so = NULL; 4677 if (so) { 4678 /* Wake any reader/writers */ 4679 sctp_sorwakeup(inp, so); 4680 sctp_sowwakeup(inp, so); 4681 } 4682 #ifdef SCTP_LOG_CLOSING 4683 sctp_log_closing(inp, stcb, 9); 4684 #endif 4685 /* no asoc destroyed */ 4686 return (0); 4687 } 4688 #ifdef SCTP_LOG_CLOSING 4689 sctp_log_closing(inp, stcb, 10); 4690 #endif 4691 /* 4692 * When I reach here, no others want to kill the assoc yet.. and I 4693 * own the lock. Now its possible an abort comes in when I do the 4694 * lock exchange below to grab all the locks to do the final take 4695 * out. to prevent this we increment the count, which will start a 4696 * timer and blow out above thus assuring us that we hold exclusive 4697 * killing of the asoc. Note that after getting back the TCB lock we 4698 * will go ahead and increment the counter back up and stop any 4699 * timer a passing stranger may have started :-S 4700 */ 4701 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4702 atomic_add_int(&stcb->asoc.refcnt, 1); 4703 4704 SCTP_TCB_UNLOCK(stcb); 4705 SCTP_INP_INFO_WLOCK(); 4706 SCTP_INP_WLOCK(inp); 4707 SCTP_TCB_LOCK(stcb); 4708 } 4709 /* Double check the GONE flag */ 4710 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4711 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4712 /* nothing around */ 4713 so = NULL; 4714 4715 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4716 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4717 /* 4718 * For TCP type we need special handling when we are 4719 * connected. We also include the peel'ed off ones to. 4720 */ 4721 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4722 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4723 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4724 if (so) { 4725 SOCK_LOCK(so); 4726 if (so->so_rcv.sb_cc == 0) { 4727 so->so_state &= ~(SS_ISCONNECTING | 4728 SS_ISDISCONNECTING | 4729 SS_ISCONFIRMING | 4730 SS_ISCONNECTED); 4731 } 4732 socantrcvmore_locked(so); 4733 sctp_sowwakeup(inp, so); 4734 sctp_sorwakeup(inp, so); 4735 SCTP_SOWAKEUP(so); 4736 } 4737 } 4738 } 4739 /* 4740 * Make it invalid too, that way if its about to run it will abort 4741 * and return. 4742 */ 4743 /* re-increment the lock */ 4744 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4745 atomic_add_int(&stcb->asoc.refcnt, -1); 4746 } 4747 if (stcb->asoc.refcnt) { 4748 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4749 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4750 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4751 SCTP_INP_INFO_WUNLOCK(); 4752 SCTP_INP_WUNLOCK(inp); 4753 } 4754 SCTP_TCB_UNLOCK(stcb); 4755 return (0); 4756 } 4757 asoc->state = 0; 4758 if (inp->sctp_tcbhash) { 4759 LIST_REMOVE(stcb, sctp_tcbhash); 4760 } 4761 if (stcb->asoc.in_asocid_hash) { 4762 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4763 } 4764 /* Now lets remove it from the list of ALL associations in the EP */ 4765 LIST_REMOVE(stcb, sctp_tcblist); 4766 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4767 SCTP_INP_INCR_REF(inp); 4768 SCTP_INP_WUNLOCK(inp); 4769 } 4770 /* pull from vtag hash */ 4771 LIST_REMOVE(stcb, sctp_asocs); 4772 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4773 inp->sctp_lport, stcb->rport); 4774 4775 /* 4776 * Now restop the timers to be sure this is paranoia at is finest! 4777 */ 4778 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4779 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4780 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4781 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4782 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4783 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4784 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4785 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4786 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4787 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4788 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4789 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4790 } 4791 4792 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4793 /* 4794 * The chunk lists and such SHOULD be empty but we check them just 4795 * in case. 4796 */ 4797 /* anything on the wheel needs to be removed */ 4798 for (i = 0; i < asoc->streamoutcnt; i++) { 4799 struct sctp_stream_out *outs; 4800 4801 outs = &asoc->strmout[i]; 4802 /* now clean up any chunks here */ 4803 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4804 TAILQ_REMOVE(&outs->outqueue, sp, next); 4805 if (sp->data) { 4806 if (so) { 4807 /* Still an open socket - report */ 4808 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4809 SCTP_NOTIFY_DATAGRAM_UNSENT, 4810 (void *)sp, SCTP_SO_LOCKED); 4811 } 4812 if (sp->data) { 4813 sctp_m_freem(sp->data); 4814 sp->data = NULL; 4815 sp->tail_mbuf = NULL; 4816 } 4817 } 4818 if (sp->net) { 4819 sctp_free_remote_addr(sp->net); 4820 sp->net = NULL; 4821 } 4822 sctp_free_spbufspace(stcb, asoc, sp); 4823 if (sp->holds_key_ref) 4824 sctp_auth_key_release(stcb, sp->auth_keyid); 4825 /* Free the zone stuff */ 4826 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 4827 SCTP_DECR_STRMOQ_COUNT(); 4828 /* sa_ignore FREED_MEMORY */ 4829 } 4830 } 4831 /* sa_ignore FREED_MEMORY */ 4832 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4833 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4834 SCTP_FREE(strrst, SCTP_M_STRESET); 4835 } 4836 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4837 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4838 if (sq->data) { 4839 sctp_m_freem(sq->data); 4840 sq->data = NULL; 4841 } 4842 sctp_free_remote_addr(sq->whoFrom); 4843 sq->whoFrom = NULL; 4844 sq->stcb = NULL; 4845 /* Free the ctl entry */ 4846 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4847 SCTP_DECR_READQ_COUNT(); 4848 /* sa_ignore FREED_MEMORY */ 4849 } 4850 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4851 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4852 if (chk->data) { 4853 sctp_m_freem(chk->data); 4854 chk->data = NULL; 4855 } 4856 if (chk->holds_key_ref) 4857 sctp_auth_key_release(stcb, chk->auth_keyid); 4858 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4859 SCTP_DECR_CHK_COUNT(); 4860 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4861 asoc->free_chunk_cnt--; 4862 /* sa_ignore FREED_MEMORY */ 4863 } 4864 /* pending send queue SHOULD be empty */ 4865 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4866 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4867 if (chk->data) { 4868 if (so) { 4869 /* Still a socket? */ 4870 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 4871 SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED); 4872 } 4873 if (chk->data) { 4874 sctp_m_freem(chk->data); 4875 chk->data = NULL; 4876 } 4877 } 4878 if (chk->holds_key_ref) 4879 sctp_auth_key_release(stcb, chk->auth_keyid); 4880 if (chk->whoTo) { 4881 sctp_free_remote_addr(chk->whoTo); 4882 chk->whoTo = NULL; 4883 } 4884 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4885 SCTP_DECR_CHK_COUNT(); 4886 /* sa_ignore FREED_MEMORY */ 4887 } 4888 /* sent queue SHOULD be empty */ 4889 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4890 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4891 if (chk->data) { 4892 if (so) { 4893 /* Still a socket? */ 4894 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 4895 SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED); 4896 } 4897 if (chk->data) { 4898 sctp_m_freem(chk->data); 4899 chk->data = NULL; 4900 } 4901 } 4902 if (chk->holds_key_ref) 4903 sctp_auth_key_release(stcb, chk->auth_keyid); 4904 sctp_free_remote_addr(chk->whoTo); 4905 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4906 SCTP_DECR_CHK_COUNT(); 4907 /* sa_ignore FREED_MEMORY */ 4908 } 4909 /* control queue MAY not be empty */ 4910 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 4911 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4912 if (chk->data) { 4913 sctp_m_freem(chk->data); 4914 chk->data = NULL; 4915 } 4916 if (chk->holds_key_ref) 4917 sctp_auth_key_release(stcb, chk->auth_keyid); 4918 sctp_free_remote_addr(chk->whoTo); 4919 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4920 SCTP_DECR_CHK_COUNT(); 4921 /* sa_ignore FREED_MEMORY */ 4922 } 4923 /* ASCONF queue MAY not be empty */ 4924 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 4925 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4926 if (chk->data) { 4927 sctp_m_freem(chk->data); 4928 chk->data = NULL; 4929 } 4930 if (chk->holds_key_ref) 4931 sctp_auth_key_release(stcb, chk->auth_keyid); 4932 sctp_free_remote_addr(chk->whoTo); 4933 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4934 SCTP_DECR_CHK_COUNT(); 4935 /* sa_ignore FREED_MEMORY */ 4936 } 4937 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 4938 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4939 if (chk->data) { 4940 sctp_m_freem(chk->data); 4941 chk->data = NULL; 4942 } 4943 if (chk->holds_key_ref) 4944 sctp_auth_key_release(stcb, chk->auth_keyid); 4945 sctp_free_remote_addr(chk->whoTo); 4946 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4947 SCTP_DECR_CHK_COUNT(); 4948 /* sa_ignore FREED_MEMORY */ 4949 } 4950 4951 if (asoc->mapping_array) { 4952 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4953 asoc->mapping_array = NULL; 4954 } 4955 if (asoc->nr_mapping_array) { 4956 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4957 asoc->nr_mapping_array = NULL; 4958 } 4959 /* the stream outs */ 4960 if (asoc->strmout) { 4961 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4962 asoc->strmout = NULL; 4963 } 4964 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 4965 if (asoc->strmin) { 4966 struct sctp_queued_to_read *ctl, *nctl; 4967 4968 for (i = 0; i < asoc->streamincnt; i++) { 4969 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 4970 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 4971 sctp_free_remote_addr(ctl->whoFrom); 4972 if (ctl->data) { 4973 sctp_m_freem(ctl->data); 4974 ctl->data = NULL; 4975 } 4976 /* 4977 * We don't free the address here since all 4978 * the net's were freed above. 4979 */ 4980 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 4981 SCTP_DECR_READQ_COUNT(); 4982 } 4983 } 4984 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4985 asoc->strmin = NULL; 4986 } 4987 asoc->streamincnt = 0; 4988 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4989 #ifdef INVARIANTS 4990 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 4991 panic("no net's left alloc'ed, or list points to itself"); 4992 } 4993 #endif 4994 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4995 sctp_free_remote_addr(net); 4996 } 4997 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 4998 /* sa_ignore FREED_MEMORY */ 4999 sctp_remove_laddr(laddr); 5000 } 5001 5002 /* pending asconf (address) parameters */ 5003 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5004 /* sa_ignore FREED_MEMORY */ 5005 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5006 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5007 } 5008 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5009 /* sa_ignore FREED_MEMORY */ 5010 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5011 if (aack->data != NULL) { 5012 sctp_m_freem(aack->data); 5013 } 5014 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5015 } 5016 /* clean up auth stuff */ 5017 if (asoc->local_hmacs) 5018 sctp_free_hmaclist(asoc->local_hmacs); 5019 if (asoc->peer_hmacs) 5020 sctp_free_hmaclist(asoc->peer_hmacs); 5021 5022 if (asoc->local_auth_chunks) 5023 sctp_free_chunklist(asoc->local_auth_chunks); 5024 if (asoc->peer_auth_chunks) 5025 sctp_free_chunklist(asoc->peer_auth_chunks); 5026 5027 sctp_free_authinfo(&asoc->authinfo); 5028 5029 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5030 LIST_REMOVE(shared_key, next); 5031 sctp_free_sharedkey(shared_key); 5032 /* sa_ignore FREED_MEMORY */ 5033 } 5034 5035 /* Insert new items here :> */ 5036 5037 /* Get rid of LOCK */ 5038 SCTP_TCB_LOCK_DESTROY(stcb); 5039 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5040 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5041 SCTP_INP_INFO_WUNLOCK(); 5042 SCTP_INP_RLOCK(inp); 5043 } 5044 #ifdef SCTP_TRACK_FREED_ASOCS 5045 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5046 /* now clean up the tasoc itself */ 5047 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5048 SCTP_DECR_ASOC_COUNT(); 5049 } else { 5050 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5051 } 5052 #else 5053 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5054 SCTP_DECR_ASOC_COUNT(); 5055 #endif 5056 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5057 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5058 /* 5059 * If its NOT the inp_free calling us AND sctp_close 5060 * as been called, we call back... 5061 */ 5062 SCTP_INP_RUNLOCK(inp); 5063 /* 5064 * This will start the kill timer (if we are the 5065 * last one) since we hold an increment yet. But 5066 * this is the only safe way to do this since 5067 * otherwise if the socket closes at the same time 5068 * we are here we might collide in the cleanup. 5069 */ 5070 sctp_inpcb_free(inp, 5071 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5072 SCTP_CALLED_DIRECTLY_NOCMPSET); 5073 SCTP_INP_DECR_REF(inp); 5074 goto out_of; 5075 } else { 5076 /* The socket is still open. */ 5077 SCTP_INP_DECR_REF(inp); 5078 } 5079 } 5080 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5081 SCTP_INP_RUNLOCK(inp); 5082 } 5083 out_of: 5084 /* destroyed the asoc */ 5085 #ifdef SCTP_LOG_CLOSING 5086 sctp_log_closing(inp, NULL, 11); 5087 #endif 5088 return (1); 5089 } 5090 5091 5092 5093 /* 5094 * determine if a destination is "reachable" based upon the addresses bound 5095 * to the current endpoint (e.g. only v4 or v6 currently bound) 5096 */ 5097 /* 5098 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5099 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5100 * types bound as its endpoint 5101 */ 5102 int 5103 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5104 { 5105 struct sctp_inpcb *inp; 5106 int answer; 5107 5108 /* 5109 * No locks here, the TCB, in all cases is already locked and an 5110 * assoc is up. There is either a INP lock by the caller applied (in 5111 * asconf case when deleting an address) or NOT in the HB case, 5112 * however if HB then the INP increment is up and the INP will not 5113 * be removed (on top of the fact that we have a TCB lock). So we 5114 * only want to read the sctp_flags, which is either bound-all or 5115 * not.. no protection needed since once an assoc is up you can't be 5116 * changing your binding. 5117 */ 5118 inp = stcb->sctp_ep; 5119 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5120 /* if bound all, destination is not restricted */ 5121 /* 5122 * RRS: Question during lock work: Is this correct? If you 5123 * are bound-all you still might need to obey the V4--V6 5124 * flags??? IMO this bound-all stuff needs to be removed! 5125 */ 5126 return (1); 5127 } 5128 /* NOTE: all "scope" checks are done when local addresses are added */ 5129 if (destaddr->sa_family == AF_INET6) { 5130 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5131 } else if (destaddr->sa_family == AF_INET) { 5132 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5133 } else { 5134 /* invalid family, so it's unreachable */ 5135 answer = 0; 5136 } 5137 return (answer); 5138 } 5139 5140 /* 5141 * update the inp_vflags on an endpoint 5142 */ 5143 static void 5144 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5145 { 5146 struct sctp_laddr *laddr; 5147 5148 /* first clear the flag */ 5149 inp->ip_inp.inp.inp_vflag = 0; 5150 /* set the flag based on addresses on the ep list */ 5151 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5152 if (laddr->ifa == NULL) { 5153 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5154 __FUNCTION__); 5155 continue; 5156 } 5157 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5158 continue; 5159 } 5160 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 5161 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5162 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 5163 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5164 } 5165 } 5166 } 5167 5168 /* 5169 * Add the address to the endpoint local address list There is nothing to be 5170 * done if we are bound to all addresses 5171 */ 5172 void 5173 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5174 { 5175 struct sctp_laddr *laddr; 5176 int fnd, error = 0; 5177 5178 fnd = 0; 5179 5180 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5181 /* You are already bound to all. You have it already */ 5182 return; 5183 } 5184 if (ifa->address.sa.sa_family == AF_INET6) { 5185 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5186 /* Can't bind a non-useable addr. */ 5187 return; 5188 } 5189 } 5190 /* first, is it already present? */ 5191 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5192 if (laddr->ifa == ifa) { 5193 fnd = 1; 5194 break; 5195 } 5196 } 5197 5198 if (fnd == 0) { 5199 /* Not in the ep list */ 5200 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5201 if (error != 0) 5202 return; 5203 inp->laddr_count++; 5204 /* update inp_vflag flags */ 5205 if (ifa->address.sa.sa_family == AF_INET6) { 5206 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5207 } else if (ifa->address.sa.sa_family == AF_INET) { 5208 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5209 } 5210 } 5211 return; 5212 } 5213 5214 5215 /* 5216 * select a new (hopefully reachable) destination net (should only be used 5217 * when we deleted an ep addr that is the only usable source address to reach 5218 * the destination net) 5219 */ 5220 static void 5221 sctp_select_primary_destination(struct sctp_tcb *stcb) 5222 { 5223 struct sctp_nets *net; 5224 5225 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5226 /* for now, we'll just pick the first reachable one we find */ 5227 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5228 continue; 5229 if (sctp_destination_is_reachable(stcb, 5230 (struct sockaddr *)&net->ro._l_addr)) { 5231 /* found a reachable destination */ 5232 stcb->asoc.primary_destination = net; 5233 } 5234 } 5235 /* I can't there from here! ...we're gonna die shortly... */ 5236 } 5237 5238 5239 /* 5240 * Delete the address from the endpoint local address list There is nothing 5241 * to be done if we are bound to all addresses 5242 */ 5243 void 5244 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5245 { 5246 struct sctp_laddr *laddr; 5247 int fnd; 5248 5249 fnd = 0; 5250 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5251 /* You are already bound to all. You have it already */ 5252 return; 5253 } 5254 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5255 if (laddr->ifa == ifa) { 5256 fnd = 1; 5257 break; 5258 } 5259 } 5260 if (fnd && (inp->laddr_count < 2)) { 5261 /* can't delete unless there are at LEAST 2 addresses */ 5262 return; 5263 } 5264 if (fnd) { 5265 /* 5266 * clean up any use of this address go through our 5267 * associations and clear any last_used_address that match 5268 * this one for each assoc, see if a new primary_destination 5269 * is needed 5270 */ 5271 struct sctp_tcb *stcb; 5272 5273 /* clean up "next_addr_touse" */ 5274 if (inp->next_addr_touse == laddr) 5275 /* delete this address */ 5276 inp->next_addr_touse = NULL; 5277 5278 /* clean up "last_used_address" */ 5279 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5280 struct sctp_nets *net; 5281 5282 SCTP_TCB_LOCK(stcb); 5283 if (stcb->asoc.last_used_address == laddr) 5284 /* delete this address */ 5285 stcb->asoc.last_used_address = NULL; 5286 /* 5287 * Now spin through all the nets and purge any ref 5288 * to laddr 5289 */ 5290 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5291 if (net->ro._s_addr && 5292 (net->ro._s_addr->ifa == laddr->ifa)) { 5293 /* Yep, purge src address selected */ 5294 sctp_rtentry_t *rt; 5295 5296 /* delete this address if cached */ 5297 rt = net->ro.ro_rt; 5298 if (rt != NULL) { 5299 RTFREE(rt); 5300 net->ro.ro_rt = NULL; 5301 } 5302 sctp_free_ifa(net->ro._s_addr); 5303 net->ro._s_addr = NULL; 5304 net->src_addr_selected = 0; 5305 } 5306 } 5307 SCTP_TCB_UNLOCK(stcb); 5308 } /* for each tcb */ 5309 /* remove it from the ep list */ 5310 sctp_remove_laddr(laddr); 5311 inp->laddr_count--; 5312 /* update inp_vflag flags */ 5313 sctp_update_ep_vflag(inp); 5314 } 5315 return; 5316 } 5317 5318 /* 5319 * Add the address to the TCB local address restricted list. 5320 * This is a "pending" address list (eg. addresses waiting for an 5321 * ASCONF-ACK response) and cannot be used as a valid source address. 5322 */ 5323 void 5324 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5325 { 5326 struct sctp_inpcb *inp; 5327 struct sctp_laddr *laddr; 5328 struct sctpladdr *list; 5329 5330 /* 5331 * Assumes TCB is locked.. and possibly the INP. May need to 5332 * confirm/fix that if we need it and is not the case. 5333 */ 5334 list = &stcb->asoc.sctp_restricted_addrs; 5335 5336 inp = stcb->sctp_ep; 5337 if (ifa->address.sa.sa_family == AF_INET6) { 5338 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5339 /* Can't bind a non-existent addr. */ 5340 return; 5341 } 5342 } 5343 /* does the address already exist? */ 5344 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5345 if (laddr->ifa == ifa) { 5346 return; 5347 } 5348 } 5349 5350 /* add to the list */ 5351 (void)sctp_insert_laddr(list, ifa, 0); 5352 return; 5353 } 5354 5355 /* 5356 * insert an laddr entry with the given ifa for the desired list 5357 */ 5358 int 5359 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5360 { 5361 struct sctp_laddr *laddr; 5362 5363 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5364 if (laddr == NULL) { 5365 /* out of memory? */ 5366 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5367 return (EINVAL); 5368 } 5369 SCTP_INCR_LADDR_COUNT(); 5370 bzero(laddr, sizeof(*laddr)); 5371 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5372 laddr->ifa = ifa; 5373 laddr->action = act; 5374 atomic_add_int(&ifa->refcount, 1); 5375 /* insert it */ 5376 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5377 5378 return (0); 5379 } 5380 5381 /* 5382 * Remove an laddr entry from the local address list (on an assoc) 5383 */ 5384 void 5385 sctp_remove_laddr(struct sctp_laddr *laddr) 5386 { 5387 5388 /* remove from the list */ 5389 LIST_REMOVE(laddr, sctp_nxt_addr); 5390 sctp_free_ifa(laddr->ifa); 5391 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5392 SCTP_DECR_LADDR_COUNT(); 5393 } 5394 5395 /* 5396 * Remove a local address from the TCB local address restricted list 5397 */ 5398 void 5399 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5400 { 5401 struct sctp_inpcb *inp; 5402 struct sctp_laddr *laddr; 5403 5404 /* 5405 * This is called by asconf work. It is assumed that a) The TCB is 5406 * locked and b) The INP is locked. This is true in as much as I can 5407 * trace through the entry asconf code where I did these locks. 5408 * Again, the ASCONF code is a bit different in that it does lock 5409 * the INP during its work often times. This must be since we don't 5410 * want other proc's looking up things while what they are looking 5411 * up is changing :-D 5412 */ 5413 5414 inp = stcb->sctp_ep; 5415 /* if subset bound and don't allow ASCONF's, can't delete last */ 5416 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5417 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5418 if (stcb->sctp_ep->laddr_count < 2) { 5419 /* can't delete last address */ 5420 return; 5421 } 5422 } 5423 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5424 /* remove the address if it exists */ 5425 if (laddr->ifa == NULL) 5426 continue; 5427 if (laddr->ifa == ifa) { 5428 sctp_remove_laddr(laddr); 5429 return; 5430 } 5431 } 5432 5433 /* address not found! */ 5434 return; 5435 } 5436 5437 /* 5438 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5439 */ 5440 /* sysctl */ 5441 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5442 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5443 5444 5445 5446 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5447 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5448 5449 void 5450 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5451 { 5452 /* Queue a packet to a processor for the specified core */ 5453 struct sctp_mcore_queue *qent; 5454 struct sctp_mcore_ctrl *wkq; 5455 int need_wake = 0; 5456 5457 if (sctp_mcore_workers == NULL) { 5458 /* Something went way bad during setup */ 5459 sctp_input_with_port(m, off, 0); 5460 return; 5461 } 5462 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5463 (sizeof(struct sctp_mcore_queue)), 5464 SCTP_M_MCORE); 5465 if (qent == NULL) { 5466 /* This is trouble */ 5467 sctp_input_with_port(m, off, 0); 5468 return; 5469 } 5470 qent->vn = curvnet; 5471 qent->m = m; 5472 qent->off = off; 5473 qent->v6 = 0; 5474 wkq = &sctp_mcore_workers[cpu_to_use]; 5475 SCTP_MCORE_QLOCK(wkq); 5476 5477 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5478 if (wkq->running == 0) { 5479 need_wake = 1; 5480 } 5481 SCTP_MCORE_QUNLOCK(wkq); 5482 if (need_wake) { 5483 wakeup(&wkq->running); 5484 } 5485 } 5486 5487 static void 5488 sctp_mcore_thread(void *arg) 5489 { 5490 5491 struct sctp_mcore_ctrl *wkq; 5492 struct sctp_mcore_queue *qent; 5493 5494 wkq = (struct sctp_mcore_ctrl *)arg; 5495 struct mbuf *m; 5496 int off, v6; 5497 5498 /* Wait for first tickle */ 5499 SCTP_MCORE_LOCK(wkq); 5500 wkq->running = 0; 5501 msleep(&wkq->running, 5502 &wkq->core_mtx, 5503 0, "wait for pkt", 0); 5504 SCTP_MCORE_UNLOCK(wkq); 5505 5506 /* Bind to our cpu */ 5507 thread_lock(curthread); 5508 sched_bind(curthread, wkq->cpuid); 5509 thread_unlock(curthread); 5510 5511 /* Now lets start working */ 5512 SCTP_MCORE_LOCK(wkq); 5513 /* Now grab lock and go */ 5514 while (1) { 5515 SCTP_MCORE_QLOCK(wkq); 5516 skip_sleep: 5517 wkq->running = 1; 5518 qent = TAILQ_FIRST(&wkq->que); 5519 if (qent) { 5520 TAILQ_REMOVE(&wkq->que, qent, next); 5521 SCTP_MCORE_QUNLOCK(wkq); 5522 CURVNET_SET(qent->vn); 5523 m = qent->m; 5524 off = qent->off; 5525 v6 = qent->v6; 5526 SCTP_FREE(qent, SCTP_M_MCORE); 5527 if (v6 == 0) { 5528 sctp_input_with_port(m, off, 0); 5529 } else { 5530 printf("V6 not yet supported\n"); 5531 sctp_m_freem(m); 5532 } 5533 CURVNET_RESTORE(); 5534 SCTP_MCORE_QLOCK(wkq); 5535 } 5536 wkq->running = 0; 5537 if (!TAILQ_EMPTY(&wkq->que)) { 5538 goto skip_sleep; 5539 } 5540 SCTP_MCORE_QUNLOCK(wkq); 5541 msleep(&wkq->running, 5542 &wkq->core_mtx, 5543 0, "wait for pkt", 0); 5544 }; 5545 } 5546 5547 static void 5548 sctp_startup_mcore_threads(void) 5549 { 5550 int i; 5551 5552 if (mp_ncpus == 1) 5553 return; 5554 5555 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5556 (mp_ncpus * sizeof(struct sctp_mcore_ctrl)), 5557 SCTP_M_MCORE); 5558 if (sctp_mcore_workers == NULL) { 5559 /* TSNH I hope */ 5560 return; 5561 } 5562 memset(sctp_mcore_workers, 0, (mp_ncpus * 5563 sizeof(struct sctp_mcore_ctrl))); 5564 /* Init the structures */ 5565 for (i = 0; i < mp_ncpus; i++) { 5566 TAILQ_INIT(&sctp_mcore_workers[i].que); 5567 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5568 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5569 sctp_mcore_workers[i].cpuid = i; 5570 } 5571 /* Now start them all */ 5572 for (i = 0; i < mp_ncpus; i++) { 5573 (void)kproc_create(sctp_mcore_thread, 5574 (void *)&sctp_mcore_workers[i], 5575 &sctp_mcore_workers[i].thread_proc, 5576 RFPROC, 5577 SCTP_KTHREAD_PAGES, 5578 SCTP_MCORE_NAME); 5579 5580 } 5581 } 5582 5583 #endif 5584 5585 5586 void 5587 sctp_pcb_init() 5588 { 5589 /* 5590 * SCTP initialization for the PCB structures should be called by 5591 * the sctp_init() funciton. 5592 */ 5593 int i; 5594 struct timeval tv; 5595 5596 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5597 /* error I was called twice */ 5598 return; 5599 } 5600 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5601 5602 #if defined(SCTP_LOCAL_TRACE_BUF) 5603 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5604 #endif 5605 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5606 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5607 (mp_ncpus * sizeof(struct sctpstat)), 5608 SCTP_M_MCORE); 5609 #endif 5610 (void)SCTP_GETTIME_TIMEVAL(&tv); 5611 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5612 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * mp_ncpus)); 5613 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5614 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5615 #else 5616 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5617 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5618 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5619 #endif 5620 /* init the empty list of (All) Endpoints */ 5621 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5622 5623 5624 /* init the hash table of endpoints */ 5625 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5626 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5627 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5628 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5629 &SCTP_BASE_INFO(hashasocmark)); 5630 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5631 &SCTP_BASE_INFO(hashmark)); 5632 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5633 &SCTP_BASE_INFO(hashtcpmark)); 5634 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5635 5636 5637 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5638 &SCTP_BASE_INFO(hashvrfmark)); 5639 5640 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5641 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5642 /* init the zones */ 5643 /* 5644 * FIX ME: Should check for NULL returns, but if it does fail we are 5645 * doomed to panic anyways... add later maybe. 5646 */ 5647 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5648 sizeof(struct sctp_inpcb), maxsockets); 5649 5650 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5651 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5652 5653 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5654 sizeof(struct sctp_laddr), 5655 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5656 5657 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5658 sizeof(struct sctp_nets), 5659 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5660 5661 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5662 sizeof(struct sctp_tmit_chunk), 5663 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5664 5665 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5666 sizeof(struct sctp_queued_to_read), 5667 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5668 5669 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5670 sizeof(struct sctp_stream_queue_pending), 5671 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5672 5673 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5674 sizeof(struct sctp_asconf), 5675 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5676 5677 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5678 sizeof(struct sctp_asconf_ack), 5679 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5680 5681 5682 /* Master Lock INIT for info structure */ 5683 SCTP_INP_INFO_LOCK_INIT(); 5684 SCTP_STATLOG_INIT_LOCK(); 5685 5686 SCTP_IPI_COUNT_INIT(); 5687 SCTP_IPI_ADDR_INIT(); 5688 #ifdef SCTP_PACKET_LOGGING 5689 SCTP_IP_PKTLOG_INIT(); 5690 #endif 5691 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5692 5693 SCTP_WQ_ADDR_INIT(); 5694 /* not sure if we need all the counts */ 5695 SCTP_BASE_INFO(ipi_count_ep) = 0; 5696 /* assoc/tcb zone info */ 5697 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5698 /* local addrlist zone info */ 5699 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5700 /* remote addrlist zone info */ 5701 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5702 /* chunk info */ 5703 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5704 5705 /* socket queue zone info */ 5706 SCTP_BASE_INFO(ipi_count_readq) = 0; 5707 5708 /* stream out queue cont */ 5709 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5710 5711 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5712 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5713 5714 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5715 5716 /* Init the TIMEWAIT list */ 5717 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5718 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5719 } 5720 5721 sctp_startup_iterator(); 5722 5723 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5724 sctp_startup_mcore_threads(); 5725 #endif 5726 5727 /* 5728 * INIT the default VRF which for BSD is the only one, other O/S's 5729 * may have more. But initially they must start with one and then 5730 * add the VRF's as addresses are added. 5731 */ 5732 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5733 5734 } 5735 5736 /* 5737 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5738 */ 5739 void 5740 sctp_pcb_finish(void) 5741 { 5742 struct sctp_vrflist *vrf_bucket; 5743 struct sctp_vrf *vrf, *nvrf; 5744 struct sctp_ifn *ifn, *nifn; 5745 struct sctp_ifa *ifa, *nifa; 5746 struct sctpvtaghead *chain; 5747 struct sctp_tagblock *twait_block, *prev_twait_block; 5748 struct sctp_laddr *wi, *nwi; 5749 int i; 5750 5751 /* 5752 * Free BSD the it thread never exits but we do clean up. The only 5753 * way freebsd reaches here if we have VRF's but we still add the 5754 * ifdef to make it compile on old versions. 5755 */ 5756 { 5757 struct sctp_iterator *it, *nit; 5758 5759 SCTP_IPI_ITERATOR_WQ_LOCK(); 5760 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5761 if (it->vn != curvnet) { 5762 continue; 5763 } 5764 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5765 if (it->function_atend != NULL) { 5766 (*it->function_atend) (it->pointer, it->val); 5767 } 5768 SCTP_FREE(it, SCTP_M_ITER); 5769 } 5770 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5771 SCTP_ITERATOR_LOCK(); 5772 if ((sctp_it_ctl.cur_it) && 5773 (sctp_it_ctl.cur_it->vn == curvnet)) { 5774 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5775 } 5776 SCTP_ITERATOR_UNLOCK(); 5777 } 5778 5779 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5780 SCTP_WQ_ADDR_LOCK(); 5781 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5782 LIST_REMOVE(wi, sctp_nxt_addr); 5783 SCTP_DECR_LADDR_COUNT(); 5784 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5785 } 5786 SCTP_WQ_ADDR_UNLOCK(); 5787 5788 /* 5789 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5790 * destroyed first). 5791 */ 5792 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5793 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5794 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5795 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5796 /* free the ifa */ 5797 LIST_REMOVE(ifa, next_bucket); 5798 LIST_REMOVE(ifa, next_ifa); 5799 SCTP_FREE(ifa, SCTP_M_IFA); 5800 } 5801 /* free the ifn */ 5802 LIST_REMOVE(ifn, next_bucket); 5803 LIST_REMOVE(ifn, next_ifn); 5804 SCTP_FREE(ifn, SCTP_M_IFN); 5805 } 5806 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5807 /* free the vrf */ 5808 LIST_REMOVE(vrf, next_vrf); 5809 SCTP_FREE(vrf, SCTP_M_VRF); 5810 } 5811 /* free the vrf hashes */ 5812 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5813 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5814 5815 /* 5816 * free the TIMEWAIT list elements malloc'd in the function 5817 * sctp_add_vtag_to_timewait()... 5818 */ 5819 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5820 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5821 if (!LIST_EMPTY(chain)) { 5822 prev_twait_block = NULL; 5823 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5824 if (prev_twait_block) { 5825 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5826 } 5827 prev_twait_block = twait_block; 5828 } 5829 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5830 } 5831 } 5832 5833 /* free the locks and mutexes */ 5834 #ifdef SCTP_PACKET_LOGGING 5835 SCTP_IP_PKTLOG_DESTROY(); 5836 #endif 5837 SCTP_IPI_ADDR_DESTROY(); 5838 SCTP_STATLOG_DESTROY(); 5839 SCTP_INP_INFO_LOCK_DESTROY(); 5840 5841 SCTP_WQ_ADDR_DESTROY(); 5842 5843 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5844 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5845 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5846 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5847 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5848 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5849 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5850 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5851 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5852 /* Get rid of other stuff to */ 5853 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5854 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5855 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5856 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5857 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5858 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5859 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5860 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5861 #endif 5862 } 5863 5864 5865 int 5866 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5867 int iphlen, int offset, int limit, struct sctphdr *sh, 5868 struct sockaddr *altsa) 5869 { 5870 /* 5871 * grub through the INIT pulling addresses and loading them to the 5872 * nets structure in the asoc. The from address in the mbuf should 5873 * also be loaded (if it is not already). This routine can be called 5874 * with either INIT or INIT-ACK's as long as the m points to the IP 5875 * packet and the offset points to the beginning of the parameters. 5876 */ 5877 struct sctp_inpcb *inp, *l_inp; 5878 struct sctp_nets *net, *nnet, *net_tmp; 5879 struct ip *iph; 5880 struct sctp_paramhdr *phdr, parm_buf; 5881 struct sctp_tcb *stcb_tmp; 5882 uint16_t ptype, plen; 5883 struct sockaddr *sa; 5884 struct sockaddr_storage dest_store; 5885 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 5886 struct sockaddr_in sin; 5887 struct sockaddr_in6 sin6; 5888 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5889 struct sctp_auth_random *p_random = NULL; 5890 uint16_t random_len = 0; 5891 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5892 struct sctp_auth_hmac_algo *hmacs = NULL; 5893 uint16_t hmacs_len = 0; 5894 uint8_t saw_asconf = 0; 5895 uint8_t saw_asconf_ack = 0; 5896 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 5897 struct sctp_auth_chunk_list *chunks = NULL; 5898 uint16_t num_chunks = 0; 5899 sctp_key_t *new_key; 5900 uint32_t keylen; 5901 int got_random = 0, got_hmacs = 0, got_chklist = 0; 5902 5903 /* First get the destination address setup too. */ 5904 memset(&sin, 0, sizeof(sin)); 5905 memset(&sin6, 0, sizeof(sin6)); 5906 5907 sin.sin_family = AF_INET; 5908 sin.sin_len = sizeof(sin); 5909 sin.sin_port = stcb->rport; 5910 5911 sin6.sin6_family = AF_INET6; 5912 sin6.sin6_len = sizeof(struct sockaddr_in6); 5913 sin6.sin6_port = stcb->rport; 5914 if (altsa == NULL) { 5915 iph = mtod(m, struct ip *); 5916 switch (iph->ip_v) { 5917 case IPVERSION: 5918 { 5919 /* its IPv4 */ 5920 struct sockaddr_in *sin_2; 5921 5922 sin_2 = (struct sockaddr_in *)(local_sa); 5923 memset(sin_2, 0, sizeof(sin)); 5924 sin_2->sin_family = AF_INET; 5925 sin_2->sin_len = sizeof(sin); 5926 sin_2->sin_port = sh->dest_port; 5927 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 5928 sin.sin_addr = iph->ip_src; 5929 sa = (struct sockaddr *)&sin; 5930 break; 5931 } 5932 #ifdef INET6 5933 case IPV6_VERSION >> 4: 5934 { 5935 /* its IPv6 */ 5936 struct ip6_hdr *ip6; 5937 struct sockaddr_in6 *sin6_2; 5938 5939 ip6 = mtod(m, struct ip6_hdr *); 5940 sin6_2 = (struct sockaddr_in6 *)(local_sa); 5941 memset(sin6_2, 0, sizeof(sin6)); 5942 sin6_2->sin6_family = AF_INET6; 5943 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 5944 sin6_2->sin6_port = sh->dest_port; 5945 sin6.sin6_addr = ip6->ip6_src; 5946 sa = (struct sockaddr *)&sin6; 5947 break; 5948 } 5949 #endif 5950 default: 5951 return (-1); 5952 break; 5953 } 5954 } else { 5955 /* 5956 * For cookies we use the src address NOT from the packet 5957 * but from the original INIT 5958 */ 5959 sa = altsa; 5960 } 5961 /* Turn off ECN until we get through all params */ 5962 stcb->asoc.ecn_allowed = 0; 5963 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5964 /* mark all addresses that we have currently on the list */ 5965 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 5966 } 5967 /* does the source address already exist? if so skip it */ 5968 l_inp = inp = stcb->sctp_ep; 5969 5970 atomic_add_int(&stcb->asoc.refcnt, 1); 5971 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 5972 atomic_add_int(&stcb->asoc.refcnt, -1); 5973 5974 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 5975 /* we must add the source address */ 5976 /* no scope set here since we have a tcb already. */ 5977 if ((sa->sa_family == AF_INET) && 5978 (stcb->asoc.ipv4_addr_legal)) { 5979 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 5980 return (-1); 5981 } 5982 } else if ((sa->sa_family == AF_INET6) && 5983 (stcb->asoc.ipv6_addr_legal)) { 5984 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 5985 return (-2); 5986 } 5987 } 5988 } else { 5989 if (net_tmp != NULL && stcb_tmp == stcb) { 5990 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 5991 } else if (stcb_tmp != stcb) { 5992 /* It belongs to another association? */ 5993 if (stcb_tmp) 5994 SCTP_TCB_UNLOCK(stcb_tmp); 5995 return (-3); 5996 } 5997 } 5998 if (stcb->asoc.state == 0) { 5999 /* the assoc was freed? */ 6000 return (-4); 6001 } 6002 /* 6003 * peer must explicitly turn this on. This may have been initialized 6004 * to be "on" in order to allow local addr changes while INIT's are 6005 * in flight. 6006 */ 6007 stcb->asoc.peer_supports_asconf = 0; 6008 /* now we must go through each of the params. */ 6009 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6010 while (phdr) { 6011 ptype = ntohs(phdr->param_type); 6012 plen = ntohs(phdr->param_length); 6013 /* 6014 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 6015 * (int)plen); 6016 */ 6017 if (offset + plen > limit) { 6018 break; 6019 } 6020 if (plen == 0) { 6021 break; 6022 } 6023 if (ptype == SCTP_IPV4_ADDRESS) { 6024 if (stcb->asoc.ipv4_addr_legal) { 6025 struct sctp_ipv4addr_param *p4, p4_buf; 6026 6027 /* ok get the v4 address and check/add */ 6028 phdr = sctp_get_next_param(m, offset, 6029 (struct sctp_paramhdr *)&p4_buf, 6030 sizeof(p4_buf)); 6031 if (plen != sizeof(struct sctp_ipv4addr_param) || 6032 phdr == NULL) { 6033 return (-5); 6034 } 6035 p4 = (struct sctp_ipv4addr_param *)phdr; 6036 sin.sin_addr.s_addr = p4->addr; 6037 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6038 /* Skip multi-cast addresses */ 6039 goto next_param; 6040 } 6041 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6042 (sin.sin_addr.s_addr == INADDR_ANY)) { 6043 goto next_param; 6044 } 6045 sa = (struct sockaddr *)&sin; 6046 inp = stcb->sctp_ep; 6047 atomic_add_int(&stcb->asoc.refcnt, 1); 6048 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6049 local_sa, stcb); 6050 atomic_add_int(&stcb->asoc.refcnt, -1); 6051 6052 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6053 inp == NULL) { 6054 /* we must add the source address */ 6055 /* 6056 * no scope set since we have a tcb 6057 * already 6058 */ 6059 6060 /* 6061 * we must validate the state again 6062 * here 6063 */ 6064 add_it_now: 6065 if (stcb->asoc.state == 0) { 6066 /* the assoc was freed? */ 6067 return (-7); 6068 } 6069 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6070 return (-8); 6071 } 6072 } else if (stcb_tmp == stcb) { 6073 if (stcb->asoc.state == 0) { 6074 /* the assoc was freed? */ 6075 return (-10); 6076 } 6077 if (net != NULL) { 6078 /* clear flag */ 6079 net->dest_state &= 6080 ~SCTP_ADDR_NOT_IN_ASSOC; 6081 } 6082 } else { 6083 /* 6084 * strange, address is in another 6085 * assoc? straighten out locks. 6086 */ 6087 if (stcb_tmp) { 6088 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6089 /* 6090 * in setup state we 6091 * abort this guy 6092 */ 6093 sctp_abort_an_association(stcb_tmp->sctp_ep, 6094 stcb_tmp, 1, NULL, 0); 6095 goto add_it_now; 6096 } 6097 SCTP_TCB_UNLOCK(stcb_tmp); 6098 } 6099 if (stcb->asoc.state == 0) { 6100 /* the assoc was freed? */ 6101 return (-12); 6102 } 6103 return (-13); 6104 } 6105 } 6106 } else if (ptype == SCTP_IPV6_ADDRESS) { 6107 if (stcb->asoc.ipv6_addr_legal) { 6108 /* ok get the v6 address and check/add */ 6109 struct sctp_ipv6addr_param *p6, p6_buf; 6110 6111 phdr = sctp_get_next_param(m, offset, 6112 (struct sctp_paramhdr *)&p6_buf, 6113 sizeof(p6_buf)); 6114 if (plen != sizeof(struct sctp_ipv6addr_param) || 6115 phdr == NULL) { 6116 return (-14); 6117 } 6118 p6 = (struct sctp_ipv6addr_param *)phdr; 6119 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6120 sizeof(p6->addr)); 6121 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6122 /* Skip multi-cast addresses */ 6123 goto next_param; 6124 } 6125 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6126 /* 6127 * Link local make no sense without 6128 * scope 6129 */ 6130 goto next_param; 6131 } 6132 sa = (struct sockaddr *)&sin6; 6133 inp = stcb->sctp_ep; 6134 atomic_add_int(&stcb->asoc.refcnt, 1); 6135 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6136 local_sa, stcb); 6137 atomic_add_int(&stcb->asoc.refcnt, -1); 6138 if (stcb_tmp == NULL && 6139 (inp == stcb->sctp_ep || inp == NULL)) { 6140 /* 6141 * we must validate the state again 6142 * here 6143 */ 6144 add_it_now6: 6145 if (stcb->asoc.state == 0) { 6146 /* the assoc was freed? */ 6147 return (-16); 6148 } 6149 /* 6150 * we must add the address, no scope 6151 * set 6152 */ 6153 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6154 return (-17); 6155 } 6156 } else if (stcb_tmp == stcb) { 6157 /* 6158 * we must validate the state again 6159 * here 6160 */ 6161 if (stcb->asoc.state == 0) { 6162 /* the assoc was freed? */ 6163 return (-19); 6164 } 6165 if (net != NULL) { 6166 /* clear flag */ 6167 net->dest_state &= 6168 ~SCTP_ADDR_NOT_IN_ASSOC; 6169 } 6170 } else { 6171 /* 6172 * strange, address is in another 6173 * assoc? straighten out locks. 6174 */ 6175 if (stcb_tmp) 6176 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6177 /* 6178 * in setup state we 6179 * abort this guy 6180 */ 6181 sctp_abort_an_association(stcb_tmp->sctp_ep, 6182 stcb_tmp, 1, NULL, 0); 6183 goto add_it_now6; 6184 } 6185 SCTP_TCB_UNLOCK(stcb_tmp); 6186 6187 if (stcb->asoc.state == 0) { 6188 /* the assoc was freed? */ 6189 return (-21); 6190 } 6191 return (-22); 6192 } 6193 } 6194 } else if (ptype == SCTP_ECN_CAPABLE) { 6195 stcb->asoc.ecn_allowed = 1; 6196 } else if (ptype == SCTP_ULP_ADAPTATION) { 6197 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6198 struct sctp_adaptation_layer_indication ai, 6199 *aip; 6200 6201 phdr = sctp_get_next_param(m, offset, 6202 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6203 aip = (struct sctp_adaptation_layer_indication *)phdr; 6204 if (aip) { 6205 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6206 stcb->asoc.adaptation_needed = 1; 6207 } 6208 } 6209 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6210 struct sctp_asconf_addr_param lstore, *fee; 6211 struct sctp_asconf_addrv4_param *fii; 6212 int lptype; 6213 struct sockaddr *lsa = NULL; 6214 6215 stcb->asoc.peer_supports_asconf = 1; 6216 if (plen > sizeof(lstore)) { 6217 return (-23); 6218 } 6219 phdr = sctp_get_next_param(m, offset, 6220 (struct sctp_paramhdr *)&lstore, 6221 min(plen, sizeof(lstore))); 6222 if (phdr == NULL) { 6223 return (-24); 6224 } 6225 fee = (struct sctp_asconf_addr_param *)phdr; 6226 lptype = ntohs(fee->addrp.ph.param_type); 6227 if (lptype == SCTP_IPV4_ADDRESS) { 6228 if (plen != 6229 sizeof(struct sctp_asconf_addrv4_param)) { 6230 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6231 (int)sizeof(struct sctp_asconf_addrv4_param), 6232 plen); 6233 } else { 6234 fii = (struct sctp_asconf_addrv4_param *)fee; 6235 sin.sin_addr.s_addr = fii->addrp.addr; 6236 lsa = (struct sockaddr *)&sin; 6237 } 6238 } else if (lptype == SCTP_IPV6_ADDRESS) { 6239 if (plen != 6240 sizeof(struct sctp_asconf_addr_param)) { 6241 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6242 (int)sizeof(struct sctp_asconf_addr_param), 6243 plen); 6244 } else { 6245 memcpy(sin6.sin6_addr.s6_addr, 6246 fee->addrp.addr, 6247 sizeof(fee->addrp.addr)); 6248 lsa = (struct sockaddr *)&sin6; 6249 } 6250 } 6251 if (lsa) { 6252 (void)sctp_set_primary_addr(stcb, sa, NULL); 6253 } 6254 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6255 stcb->asoc.peer_supports_nat = 1; 6256 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6257 /* Peer supports pr-sctp */ 6258 stcb->asoc.peer_supports_prsctp = 1; 6259 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6260 /* A supported extension chunk */ 6261 struct sctp_supported_chunk_types_param *pr_supported; 6262 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6263 int num_ent, i; 6264 6265 phdr = sctp_get_next_param(m, offset, 6266 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6267 if (phdr == NULL) { 6268 return (-25); 6269 } 6270 stcb->asoc.peer_supports_asconf = 0; 6271 stcb->asoc.peer_supports_prsctp = 0; 6272 stcb->asoc.peer_supports_pktdrop = 0; 6273 stcb->asoc.peer_supports_strreset = 0; 6274 stcb->asoc.peer_supports_nr_sack = 0; 6275 stcb->asoc.peer_supports_auth = 0; 6276 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6277 num_ent = plen - sizeof(struct sctp_paramhdr); 6278 for (i = 0; i < num_ent; i++) { 6279 switch (pr_supported->chunk_types[i]) { 6280 case SCTP_ASCONF: 6281 case SCTP_ASCONF_ACK: 6282 stcb->asoc.peer_supports_asconf = 1; 6283 break; 6284 case SCTP_FORWARD_CUM_TSN: 6285 stcb->asoc.peer_supports_prsctp = 1; 6286 break; 6287 case SCTP_PACKET_DROPPED: 6288 stcb->asoc.peer_supports_pktdrop = 1; 6289 break; 6290 case SCTP_NR_SELECTIVE_ACK: 6291 stcb->asoc.peer_supports_nr_sack = 1; 6292 break; 6293 case SCTP_STREAM_RESET: 6294 stcb->asoc.peer_supports_strreset = 1; 6295 break; 6296 case SCTP_AUTHENTICATION: 6297 stcb->asoc.peer_supports_auth = 1; 6298 break; 6299 default: 6300 /* one I have not learned yet */ 6301 break; 6302 6303 } 6304 } 6305 } else if (ptype == SCTP_RANDOM) { 6306 if (plen > sizeof(random_store)) 6307 break; 6308 if (got_random) { 6309 /* already processed a RANDOM */ 6310 goto next_param; 6311 } 6312 phdr = sctp_get_next_param(m, offset, 6313 (struct sctp_paramhdr *)random_store, 6314 min(sizeof(random_store), plen)); 6315 if (phdr == NULL) 6316 return (-26); 6317 p_random = (struct sctp_auth_random *)phdr; 6318 random_len = plen - sizeof(*p_random); 6319 /* enforce the random length */ 6320 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6321 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6322 return (-27); 6323 } 6324 got_random = 1; 6325 } else if (ptype == SCTP_HMAC_LIST) { 6326 int num_hmacs; 6327 int i; 6328 6329 if (plen > sizeof(hmacs_store)) 6330 break; 6331 if (got_hmacs) { 6332 /* already processed a HMAC list */ 6333 goto next_param; 6334 } 6335 phdr = sctp_get_next_param(m, offset, 6336 (struct sctp_paramhdr *)hmacs_store, 6337 min(plen, sizeof(hmacs_store))); 6338 if (phdr == NULL) 6339 return (-28); 6340 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6341 hmacs_len = plen - sizeof(*hmacs); 6342 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6343 /* validate the hmac list */ 6344 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6345 return (-29); 6346 } 6347 if (stcb->asoc.peer_hmacs != NULL) 6348 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6349 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6350 if (stcb->asoc.peer_hmacs != NULL) { 6351 for (i = 0; i < num_hmacs; i++) { 6352 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6353 ntohs(hmacs->hmac_ids[i])); 6354 } 6355 } 6356 got_hmacs = 1; 6357 } else if (ptype == SCTP_CHUNK_LIST) { 6358 int i; 6359 6360 if (plen > sizeof(chunks_store)) 6361 break; 6362 if (got_chklist) { 6363 /* already processed a Chunks list */ 6364 goto next_param; 6365 } 6366 phdr = sctp_get_next_param(m, offset, 6367 (struct sctp_paramhdr *)chunks_store, 6368 min(plen, sizeof(chunks_store))); 6369 if (phdr == NULL) 6370 return (-30); 6371 chunks = (struct sctp_auth_chunk_list *)phdr; 6372 num_chunks = plen - sizeof(*chunks); 6373 if (stcb->asoc.peer_auth_chunks != NULL) 6374 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6375 else 6376 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6377 for (i = 0; i < num_chunks; i++) { 6378 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6379 stcb->asoc.peer_auth_chunks); 6380 /* record asconf/asconf-ack if listed */ 6381 if (chunks->chunk_types[i] == SCTP_ASCONF) 6382 saw_asconf = 1; 6383 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6384 saw_asconf_ack = 1; 6385 6386 } 6387 got_chklist = 1; 6388 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6389 (ptype == SCTP_STATE_COOKIE) || 6390 (ptype == SCTP_UNRECOG_PARAM) || 6391 (ptype == SCTP_COOKIE_PRESERVE) || 6392 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6393 (ptype == SCTP_ADD_IP_ADDRESS) || 6394 (ptype == SCTP_DEL_IP_ADDRESS) || 6395 (ptype == SCTP_ERROR_CAUSE_IND) || 6396 (ptype == SCTP_SUCCESS_REPORT)) { 6397 /* don't care */ ; 6398 } else { 6399 if ((ptype & 0x8000) == 0x0000) { 6400 /* 6401 * must stop processing the rest of the 6402 * param's. Any report bits were handled 6403 * with the call to 6404 * sctp_arethere_unrecognized_parameters() 6405 * when the INIT or INIT-ACK was first seen. 6406 */ 6407 break; 6408 } 6409 } 6410 6411 next_param: 6412 offset += SCTP_SIZE32(plen); 6413 if (offset >= limit) { 6414 break; 6415 } 6416 phdr = sctp_get_next_param(m, offset, &parm_buf, 6417 sizeof(parm_buf)); 6418 } 6419 /* Now check to see if we need to purge any addresses */ 6420 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6421 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6422 SCTP_ADDR_NOT_IN_ASSOC) { 6423 /* This address has been removed from the asoc */ 6424 /* remove and free it */ 6425 stcb->asoc.numnets--; 6426 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6427 sctp_free_remote_addr(net); 6428 if (net == stcb->asoc.primary_destination) { 6429 stcb->asoc.primary_destination = NULL; 6430 sctp_select_primary_destination(stcb); 6431 } 6432 } 6433 } 6434 /* validate authentication required parameters */ 6435 if (got_random && got_hmacs) { 6436 stcb->asoc.peer_supports_auth = 1; 6437 } else { 6438 stcb->asoc.peer_supports_auth = 0; 6439 } 6440 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6441 /* peer does not support auth but sent a chunks list? */ 6442 return (-31); 6443 } 6444 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6445 !stcb->asoc.peer_supports_auth) { 6446 /* peer supports asconf but not auth? */ 6447 return (-32); 6448 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6449 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6450 return (-33); 6451 } 6452 /* concatenate the full random key */ 6453 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6454 if (chunks != NULL) { 6455 keylen += sizeof(*chunks) + num_chunks; 6456 } 6457 new_key = sctp_alloc_key(keylen); 6458 if (new_key != NULL) { 6459 /* copy in the RANDOM */ 6460 if (p_random != NULL) { 6461 keylen = sizeof(*p_random) + random_len; 6462 bcopy(p_random, new_key->key, keylen); 6463 } 6464 /* append in the AUTH chunks */ 6465 if (chunks != NULL) { 6466 bcopy(chunks, new_key->key + keylen, 6467 sizeof(*chunks) + num_chunks); 6468 keylen += sizeof(*chunks) + num_chunks; 6469 } 6470 /* append in the HMACs */ 6471 if (hmacs != NULL) { 6472 bcopy(hmacs, new_key->key + keylen, 6473 sizeof(*hmacs) + hmacs_len); 6474 } 6475 } else { 6476 /* failed to get memory for the key */ 6477 return (-34); 6478 } 6479 if (stcb->asoc.authinfo.peer_random != NULL) 6480 sctp_free_key(stcb->asoc.authinfo.peer_random); 6481 stcb->asoc.authinfo.peer_random = new_key; 6482 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6483 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6484 6485 return (0); 6486 } 6487 6488 int 6489 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6490 struct sctp_nets *net) 6491 { 6492 /* make sure the requested primary address exists in the assoc */ 6493 if (net == NULL && sa) 6494 net = sctp_findnet(stcb, sa); 6495 6496 if (net == NULL) { 6497 /* didn't find the requested primary address! */ 6498 return (-1); 6499 } else { 6500 /* set the primary address */ 6501 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6502 /* Must be confirmed, so queue to set */ 6503 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6504 return (0); 6505 } 6506 stcb->asoc.primary_destination = net; 6507 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 6508 net = TAILQ_FIRST(&stcb->asoc.nets); 6509 if (net != stcb->asoc.primary_destination) { 6510 /* 6511 * first one on the list is NOT the primary 6512 * sctp_cmpaddr() is much more efficient if the 6513 * primary is the first on the list, make it so. 6514 */ 6515 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6516 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6517 } 6518 return (0); 6519 } 6520 } 6521 6522 int 6523 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6524 { 6525 /* 6526 * This function serves two purposes. It will see if a TAG can be 6527 * re-used and return 1 for yes it is ok and 0 for don't use that 6528 * tag. A secondary function it will do is purge out old tags that 6529 * can be removed. 6530 */ 6531 struct sctpvtaghead *chain; 6532 struct sctp_tagblock *twait_block; 6533 struct sctpasochead *head; 6534 struct sctp_tcb *stcb; 6535 int i; 6536 6537 SCTP_INP_INFO_RLOCK(); 6538 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6539 SCTP_BASE_INFO(hashasocmark))]; 6540 if (head == NULL) { 6541 /* invalid vtag */ 6542 goto skip_vtag_check; 6543 } 6544 LIST_FOREACH(stcb, head, sctp_asocs) { 6545 /* 6546 * We choose not to lock anything here. TCB's can't be 6547 * removed since we have the read lock, so they can't be 6548 * freed on us, same thing for the INP. I may be wrong with 6549 * this assumption, but we will go with it for now :-) 6550 */ 6551 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6552 continue; 6553 } 6554 if (stcb->asoc.my_vtag == tag) { 6555 /* candidate */ 6556 if (stcb->rport != rport) { 6557 continue; 6558 } 6559 if (stcb->sctp_ep->sctp_lport != lport) { 6560 continue; 6561 } 6562 /* Its a used tag set */ 6563 SCTP_INP_INFO_RUNLOCK(); 6564 return (0); 6565 } 6566 } 6567 skip_vtag_check: 6568 6569 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6570 /* Now what about timed wait ? */ 6571 if (!LIST_EMPTY(chain)) { 6572 /* 6573 * Block(s) are present, lets see if we have this tag in the 6574 * list 6575 */ 6576 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6577 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6578 if (twait_block->vtag_block[i].v_tag == 0) { 6579 /* not used */ 6580 continue; 6581 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6582 now->tv_sec) { 6583 /* Audit expires this guy */ 6584 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6585 twait_block->vtag_block[i].v_tag = 0; 6586 twait_block->vtag_block[i].lport = 0; 6587 twait_block->vtag_block[i].rport = 0; 6588 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6589 (twait_block->vtag_block[i].lport == lport) && 6590 (twait_block->vtag_block[i].rport == rport)) { 6591 /* Bad tag, sorry :< */ 6592 SCTP_INP_INFO_RUNLOCK(); 6593 return (0); 6594 } 6595 } 6596 } 6597 } 6598 SCTP_INP_INFO_RUNLOCK(); 6599 return (1); 6600 } 6601 6602 6603 static sctp_assoc_t reneged_asoc_ids[256]; 6604 static uint8_t reneged_at = 0; 6605 6606 6607 static void 6608 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6609 { 6610 /* 6611 * We must hunt this association for MBUF's past the cumack (i.e. 6612 * out of order data that we can renege on). 6613 */ 6614 struct sctp_association *asoc; 6615 struct sctp_tmit_chunk *chk, *nchk; 6616 uint32_t cumulative_tsn_p1; 6617 struct sctp_queued_to_read *ctl, *nctl; 6618 int cnt, strmat; 6619 uint32_t gap, i; 6620 int fnd = 0; 6621 6622 /* We look for anything larger than the cum-ack + 1 */ 6623 6624 asoc = &stcb->asoc; 6625 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6626 /* none we can reneg on. */ 6627 return; 6628 } 6629 SCTP_STAT_INCR(sctps_protocol_drains_done); 6630 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6631 cnt = 0; 6632 /* First look in the re-assembly queue */ 6633 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6634 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6635 /* Yep it is above cum-ack */ 6636 cnt++; 6637 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6638 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6639 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6640 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6641 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6642 if (chk->data) { 6643 sctp_m_freem(chk->data); 6644 chk->data = NULL; 6645 } 6646 sctp_free_a_chunk(stcb, chk); 6647 } 6648 } 6649 /* Ok that was fun, now we will drain all the inbound streams? */ 6650 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6651 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6652 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6653 /* Yep it is above cum-ack */ 6654 cnt++; 6655 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6656 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6657 sctp_ucount_decr(asoc->cnt_on_all_streams); 6658 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6659 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6660 if (ctl->data) { 6661 sctp_m_freem(ctl->data); 6662 ctl->data = NULL; 6663 } 6664 sctp_free_remote_addr(ctl->whoFrom); 6665 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6666 SCTP_DECR_READQ_COUNT(); 6667 } 6668 } 6669 } 6670 if (cnt) { 6671 /* We must back down to see what the new highest is */ 6672 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6673 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6674 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6675 asoc->highest_tsn_inside_map = i; 6676 fnd = 1; 6677 break; 6678 } 6679 } 6680 if (!fnd) { 6681 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6682 } 6683 /* 6684 * Question, should we go through the delivery queue? The 6685 * only reason things are on here is the app not reading OR 6686 * a p-d-api up. An attacker COULD send enough in to 6687 * initiate the PD-API and then send a bunch of stuff to 6688 * other streams... these would wind up on the delivery 6689 * queue.. and then we would not get to them. But in order 6690 * to do this I then have to back-track and un-deliver 6691 * sequence numbers in streams.. el-yucko. I think for now 6692 * we will NOT look at the delivery queue and leave it to be 6693 * something to consider later. An alternative would be to 6694 * abort the P-D-API with a notification and then deliver 6695 * the data.... Or another method might be to keep track of 6696 * how many times the situation occurs and if we see a 6697 * possible attack underway just abort the association. 6698 */ 6699 #ifdef SCTP_DEBUG 6700 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6701 #endif 6702 /* 6703 * Now do we need to find a new 6704 * asoc->highest_tsn_inside_map? 6705 */ 6706 asoc->last_revoke_count = cnt; 6707 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6708 /* sa_ignore NO_NULL_CHK */ 6709 sctp_send_sack(stcb); 6710 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6711 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 6712 reneged_at++; 6713 } 6714 /* 6715 * Another issue, in un-setting the TSN's in the mapping array we 6716 * DID NOT adjust the highest_tsn marker. This will cause one of 6717 * two things to occur. It may cause us to do extra work in checking 6718 * for our mapping array movement. More importantly it may cause us 6719 * to SACK every datagram. This may not be a bad thing though since 6720 * we will recover once we get our cum-ack above and all this stuff 6721 * we dumped recovered. 6722 */ 6723 } 6724 6725 void 6726 sctp_drain() 6727 { 6728 /* 6729 * We must walk the PCB lists for ALL associations here. The system 6730 * is LOW on MBUF's and needs help. This is where reneging will 6731 * occur. We really hope this does NOT happen! 6732 */ 6733 VNET_ITERATOR_DECL(vnet_iter); 6734 VNET_LIST_RLOCK_NOSLEEP(); 6735 VNET_FOREACH(vnet_iter) { 6736 CURVNET_SET(vnet_iter); 6737 struct sctp_inpcb *inp; 6738 struct sctp_tcb *stcb; 6739 6740 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6741 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6742 #ifdef VIMAGE 6743 continue; 6744 #else 6745 return; 6746 #endif 6747 } 6748 SCTP_INP_INFO_RLOCK(); 6749 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6750 /* For each endpoint */ 6751 SCTP_INP_RLOCK(inp); 6752 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6753 /* For each association */ 6754 SCTP_TCB_LOCK(stcb); 6755 sctp_drain_mbufs(inp, stcb); 6756 SCTP_TCB_UNLOCK(stcb); 6757 } 6758 SCTP_INP_RUNLOCK(inp); 6759 } 6760 SCTP_INP_INFO_RUNLOCK(); 6761 CURVNET_RESTORE(); 6762 } 6763 VNET_LIST_RUNLOCK_NOSLEEP(); 6764 } 6765 6766 /* 6767 * start a new iterator 6768 * iterates through all endpoints and associations based on the pcb_state 6769 * flags and asoc_state. "af" (mandatory) is executed for all matching 6770 * assocs and "ef" (optional) is executed when the iterator completes. 6771 * "inpf" (optional) is executed for each new endpoint as it is being 6772 * iterated through. inpe (optional) is called when the inp completes 6773 * its way through all the stcbs. 6774 */ 6775 int 6776 sctp_initiate_iterator(inp_func inpf, 6777 asoc_func af, 6778 inp_func inpe, 6779 uint32_t pcb_state, 6780 uint32_t pcb_features, 6781 uint32_t asoc_state, 6782 void *argp, 6783 uint32_t argi, 6784 end_func ef, 6785 struct sctp_inpcb *s_inp, 6786 uint8_t chunk_output_off) 6787 { 6788 struct sctp_iterator *it = NULL; 6789 6790 if (af == NULL) { 6791 return (-1); 6792 } 6793 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6794 SCTP_M_ITER); 6795 if (it == NULL) { 6796 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6797 return (ENOMEM); 6798 } 6799 memset(it, 0, sizeof(*it)); 6800 it->function_assoc = af; 6801 it->function_inp = inpf; 6802 if (inpf) 6803 it->done_current_ep = 0; 6804 else 6805 it->done_current_ep = 1; 6806 it->function_atend = ef; 6807 it->pointer = argp; 6808 it->val = argi; 6809 it->pcb_flags = pcb_state; 6810 it->pcb_features = pcb_features; 6811 it->asoc_state = asoc_state; 6812 it->function_inp_end = inpe; 6813 it->no_chunk_output = chunk_output_off; 6814 it->vn = curvnet; 6815 if (s_inp) { 6816 /* Assume lock is held here */ 6817 it->inp = s_inp; 6818 SCTP_INP_INCR_REF(it->inp); 6819 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6820 } else { 6821 SCTP_INP_INFO_RLOCK(); 6822 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6823 if (it->inp) { 6824 SCTP_INP_INCR_REF(it->inp); 6825 } 6826 SCTP_INP_INFO_RUNLOCK(); 6827 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6828 6829 } 6830 SCTP_IPI_ITERATOR_WQ_LOCK(); 6831 6832 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6833 if (sctp_it_ctl.iterator_running == 0) { 6834 sctp_wakeup_iterator(); 6835 } 6836 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6837 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6838 return (0); 6839 } 6840