1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #include <sys/proc.h> 40 #include <netinet/sctp_var.h> 41 #include <netinet/sctp_sysctl.h> 42 #include <netinet/sctp_pcb.h> 43 #include <netinet/sctputil.h> 44 #include <netinet/sctp.h> 45 #include <netinet/sctp_header.h> 46 #include <netinet/sctp_asconf.h> 47 #include <netinet/sctp_output.h> 48 #include <netinet/sctp_timer.h> 49 #include <netinet/sctp_bsd_addr.h> 50 #include <netinet/sctp_dtrace_define.h> 51 #include <netinet/udp.h> 52 #ifdef INET6 53 #include <netinet6/ip6_var.h> 54 #endif 55 #include <sys/sched.h> 56 #include <sys/smp.h> 57 #include <sys/unistd.h> 58 59 60 VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62 /* FIX: we don't handle multiple link local scopes */ 63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64 #ifdef INET6 65 int 66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67 { 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return 0; 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return 0; 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79 } 80 81 #endif 82 83 void 84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85 { 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 100 SCTP_INP_INFO_RUNLOCK(); 101 } 102 103 /* 104 * Addresses are added to VRF's (Virtual Router's). For BSD we 105 * have only the default VRF 0. We maintain a hash list of 106 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 107 * these has a list of addresses. When we add a new address 108 * to a VRF we lookup the ifn/ifn_index, if the ifn does 109 * not exist we create it and add it to the list of IFN's 110 * within the VRF. Once we have the sctp_ifn, we add the 111 * address to the list. So we look something like: 112 * 113 * hash-vrf-table 114 * vrf-> ifn-> ifn -> ifn 115 * vrf | 116 * ... +--ifa-> ifa -> ifa 117 * vrf 118 * 119 * We keep these separate lists since the SCTP subsystem will 120 * point to these from its source address selection nets structure. 121 * When an address is deleted it does not happen right away on 122 * the SCTP side, it gets scheduled. What we do when a 123 * delete happens is immediately remove the address from 124 * the master list and decrement the refcount. As our 125 * addip iterator works through and frees the src address 126 * selection pointing to the sctp_ifa, eventually the refcount 127 * will reach 0 and we will delete it. Note that it is assumed 128 * that any locking on system level ifn/ifa is done at the 129 * caller of these functions and these routines will only 130 * lock the SCTP structures as they add or delete things. 131 * 132 * Other notes on VRF concepts. 133 * - An endpoint can be in multiple VRF's 134 * - An association lives within a VRF and only one VRF. 135 * - Any incoming packet we can deduce the VRF for by 136 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 137 * - Any downward send call or connect call must supply the 138 * VRF via ancillary data or via some sort of set default 139 * VRF socket option call (again for BSD no brainer since 140 * the VRF is always 0). 141 * - An endpoint may add multiple VRF's to it. 142 * - Listening sockets can accept associations in any 143 * of the VRF's they are in but the assoc will end up 144 * in only one VRF (gotten from the packet or connect/send). 145 * 146 */ 147 148 struct sctp_vrf * 149 sctp_allocate_vrf(int vrf_id) 150 { 151 struct sctp_vrf *vrf = NULL; 152 struct sctp_vrflist *bucket; 153 154 /* First allocate the VRF structure */ 155 vrf = sctp_find_vrf(vrf_id); 156 if (vrf) { 157 /* Already allocated */ 158 return (vrf); 159 } 160 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 161 SCTP_M_VRF); 162 if (vrf == NULL) { 163 /* No memory */ 164 #ifdef INVARIANTS 165 panic("No memory for VRF:%d", vrf_id); 166 #endif 167 return (NULL); 168 } 169 /* setup the VRF */ 170 memset(vrf, 0, sizeof(struct sctp_vrf)); 171 vrf->vrf_id = vrf_id; 172 LIST_INIT(&vrf->ifnlist); 173 vrf->total_ifa_count = 0; 174 vrf->refcount = 0; 175 /* now also setup table ids */ 176 SCTP_INIT_VRF_TABLEID(vrf); 177 /* Init the HASH of addresses */ 178 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 179 &vrf->vrf_addr_hashmark); 180 if (vrf->vrf_addr_hash == NULL) { 181 /* No memory */ 182 #ifdef INVARIANTS 183 panic("No memory for VRF:%d", vrf_id); 184 #endif 185 SCTP_FREE(vrf, SCTP_M_VRF); 186 return (NULL); 187 } 188 /* Add it to the hash table */ 189 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 190 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 191 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 192 return (vrf); 193 } 194 195 196 struct sctp_ifn * 197 sctp_find_ifn(void *ifn, uint32_t ifn_index) 198 { 199 struct sctp_ifn *sctp_ifnp; 200 struct sctp_ifnlist *hash_ifn_head; 201 202 /* 203 * We assume the lock is held for the addresses if that's wrong 204 * problems could occur :-) 205 */ 206 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 207 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 208 if (sctp_ifnp->ifn_index == ifn_index) { 209 return (sctp_ifnp); 210 } 211 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 212 return (sctp_ifnp); 213 } 214 } 215 return (NULL); 216 } 217 218 219 220 struct sctp_vrf * 221 sctp_find_vrf(uint32_t vrf_id) 222 { 223 struct sctp_vrflist *bucket; 224 struct sctp_vrf *liste; 225 226 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 227 LIST_FOREACH(liste, bucket, next_vrf) { 228 if (vrf_id == liste->vrf_id) { 229 return (liste); 230 } 231 } 232 return (NULL); 233 } 234 235 void 236 sctp_free_vrf(struct sctp_vrf *vrf) 237 { 238 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 239 if (vrf->vrf_addr_hash) { 240 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 241 vrf->vrf_addr_hash = NULL; 242 } 243 /* We zero'd the count */ 244 LIST_REMOVE(vrf, next_vrf); 245 SCTP_FREE(vrf, SCTP_M_VRF); 246 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 247 } 248 } 249 250 void 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252 { 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261 } 262 263 void 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 265 { 266 struct sctp_ifn *sctp_ifnp; 267 268 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 269 if (sctp_ifnp != NULL) { 270 sctp_ifnp->ifn_mtu = mtu; 271 } 272 } 273 274 275 void 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 277 { 278 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 279 /* We zero'd the count */ 280 if (sctp_ifap->ifn_p) { 281 sctp_free_ifn(sctp_ifap->ifn_p); 282 } 283 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 284 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 285 } 286 } 287 288 static void 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 290 { 291 struct sctp_ifn *found; 292 293 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 294 if (found == NULL) { 295 /* Not in the list.. sorry */ 296 return; 297 } 298 if (hold_addr_lock == 0) 299 SCTP_IPI_ADDR_WLOCK(); 300 LIST_REMOVE(sctp_ifnp, next_bucket); 301 LIST_REMOVE(sctp_ifnp, next_ifn); 302 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 303 sctp_ifnp->registered_af); 304 if (hold_addr_lock == 0) 305 SCTP_IPI_ADDR_WUNLOCK(); 306 /* Take away the reference, and possibly free it */ 307 sctp_free_ifn(sctp_ifnp); 308 } 309 310 void 311 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 312 const char *if_name, uint32_t ifn_index) 313 { 314 struct sctp_vrf *vrf; 315 struct sctp_ifa *sctp_ifap = NULL; 316 317 SCTP_IPI_ADDR_RLOCK(); 318 vrf = sctp_find_vrf(vrf_id); 319 if (vrf == NULL) { 320 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 321 goto out; 322 323 } 324 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 325 if (sctp_ifap == NULL) { 326 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 327 goto out; 328 } 329 if (sctp_ifap->ifn_p == NULL) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 331 goto out; 332 } 333 if (if_name) { 334 int len1, len2; 335 336 len1 = strlen(if_name); 337 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 338 if (len1 != len2) { 339 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n", 340 len1, len2); 341 goto out; 342 } 343 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 345 sctp_ifap->ifn_p->ifn_name, 346 if_name); 347 goto out; 348 } 349 } else { 350 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 351 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 352 sctp_ifap->ifn_p->ifn_index, ifn_index); 353 goto out; 354 } 355 } 356 357 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 358 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 359 out: 360 SCTP_IPI_ADDR_RUNLOCK(); 361 } 362 363 void 364 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 365 const char *if_name, uint32_t ifn_index) 366 { 367 struct sctp_vrf *vrf; 368 struct sctp_ifa *sctp_ifap = NULL; 369 370 SCTP_IPI_ADDR_RLOCK(); 371 vrf = sctp_find_vrf(vrf_id); 372 if (vrf == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 374 goto out; 375 376 } 377 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 378 if (sctp_ifap == NULL) { 379 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 380 goto out; 381 } 382 if (sctp_ifap->ifn_p == NULL) { 383 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 384 goto out; 385 } 386 if (if_name) { 387 int len1, len2; 388 389 len1 = strlen(if_name); 390 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 391 if (len1 != len2) { 392 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n", 393 len1, len2); 394 goto out; 395 } 396 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 397 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 398 sctp_ifap->ifn_p->ifn_name, 399 if_name); 400 goto out; 401 } 402 } else { 403 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 404 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 405 sctp_ifap->ifn_p->ifn_index, ifn_index); 406 goto out; 407 } 408 } 409 410 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 411 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 412 out: 413 SCTP_IPI_ADDR_RUNLOCK(); 414 } 415 416 /*- 417 * Add an ifa to an ifn. 418 * Register the interface as necessary. 419 * NOTE: ADDR write lock MUST be held. 420 */ 421 static void 422 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 423 { 424 int ifa_af; 425 426 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 427 sctp_ifap->ifn_p = sctp_ifnp; 428 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 429 /* update address counts */ 430 sctp_ifnp->ifa_count++; 431 ifa_af = sctp_ifap->address.sa.sa_family; 432 switch (ifa_af) { 433 #ifdef INET 434 case AF_INET: 435 sctp_ifnp->num_v4++; 436 break; 437 #endif 438 #ifdef INET6 439 case AF_INET6: 440 sctp_ifnp->num_v6++; 441 break; 442 #endif 443 default: 444 break; 445 } 446 if (sctp_ifnp->ifa_count == 1) { 447 /* register the new interface */ 448 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 449 sctp_ifnp->registered_af = ifa_af; 450 } 451 } 452 453 /*- 454 * Remove an ifa from its ifn. 455 * If no more addresses exist, remove the ifn too. Otherwise, re-register 456 * the interface based on the remaining address families left. 457 * NOTE: ADDR write lock MUST be held. 458 */ 459 static void 460 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 461 { 462 uint32_t ifn_index; 463 464 LIST_REMOVE(sctp_ifap, next_ifa); 465 if (sctp_ifap->ifn_p) { 466 /* update address counts */ 467 sctp_ifap->ifn_p->ifa_count--; 468 switch (sctp_ifap->address.sa.sa_family) { 469 #ifdef INET 470 case AF_INET: 471 sctp_ifap->ifn_p->num_v4--; 472 break; 473 #endif 474 #ifdef INET6 475 case AF_INET6: 476 sctp_ifap->ifn_p->num_v6--; 477 break; 478 #endif 479 default: 480 break; 481 } 482 483 ifn_index = sctp_ifap->ifn_p->ifn_index; 484 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 485 /* remove the ifn, possibly freeing it */ 486 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 487 } else { 488 /* re-register address family type, if needed */ 489 if ((sctp_ifap->ifn_p->num_v6 == 0) && 490 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 491 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6); 492 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET); 493 sctp_ifap->ifn_p->registered_af = AF_INET; 494 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 495 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 496 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET); 497 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6); 498 sctp_ifap->ifn_p->registered_af = AF_INET6; 499 } 500 /* free the ifn refcount */ 501 sctp_free_ifn(sctp_ifap->ifn_p); 502 } 503 sctp_ifap->ifn_p = NULL; 504 } 505 } 506 507 struct sctp_ifa * 508 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 509 uint32_t ifn_type, const char *if_name, void *ifa, 510 struct sockaddr *addr, uint32_t ifa_flags, 511 int dynamic_add) 512 { 513 struct sctp_vrf *vrf; 514 struct sctp_ifn *sctp_ifnp = NULL; 515 struct sctp_ifa *sctp_ifap = NULL; 516 struct sctp_ifalist *hash_addr_head; 517 struct sctp_ifnlist *hash_ifn_head; 518 uint32_t hash_of_addr; 519 int new_ifn_af = 0; 520 521 #ifdef SCTP_DEBUG 522 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 523 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 524 #endif 525 SCTP_IPI_ADDR_WLOCK(); 526 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 527 if (sctp_ifnp) { 528 vrf = sctp_ifnp->vrf; 529 } else { 530 vrf = sctp_find_vrf(vrf_id); 531 if (vrf == NULL) { 532 vrf = sctp_allocate_vrf(vrf_id); 533 if (vrf == NULL) { 534 SCTP_IPI_ADDR_WUNLOCK(); 535 return (NULL); 536 } 537 } 538 } 539 if (sctp_ifnp == NULL) { 540 /* 541 * build one and add it, can't hold lock until after malloc 542 * done though. 543 */ 544 SCTP_IPI_ADDR_WUNLOCK(); 545 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 546 sizeof(struct sctp_ifn), SCTP_M_IFN); 547 if (sctp_ifnp == NULL) { 548 #ifdef INVARIANTS 549 panic("No memory for IFN"); 550 #endif 551 return (NULL); 552 } 553 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 554 sctp_ifnp->ifn_index = ifn_index; 555 sctp_ifnp->ifn_p = ifn; 556 sctp_ifnp->ifn_type = ifn_type; 557 sctp_ifnp->refcount = 0; 558 sctp_ifnp->vrf = vrf; 559 atomic_add_int(&vrf->refcount, 1); 560 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 561 if (if_name != NULL) { 562 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ); 563 } else { 564 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ)); 565 } 566 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 567 LIST_INIT(&sctp_ifnp->ifalist); 568 SCTP_IPI_ADDR_WLOCK(); 569 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 570 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 571 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 572 new_ifn_af = 1; 573 } 574 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 575 if (sctp_ifap) { 576 /* Hmm, it already exists? */ 577 if ((sctp_ifap->ifn_p) && 578 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 579 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 580 sctp_ifap->ifn_p->ifn_name, ifn_index, 581 sctp_ifap); 582 if (new_ifn_af) { 583 /* Remove the created one that we don't want */ 584 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 585 } 586 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 587 /* easy to solve, just switch back to active */ 588 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 589 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 590 sctp_ifap->ifn_p = sctp_ifnp; 591 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 592 } 593 exit_stage_left: 594 SCTP_IPI_ADDR_WUNLOCK(); 595 return (sctp_ifap); 596 } else { 597 if (sctp_ifap->ifn_p) { 598 /* 599 * The last IFN gets the address, remove the 600 * old one 601 */ 602 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 603 sctp_ifap, sctp_ifap->ifn_p->ifn_name, 604 sctp_ifap->ifn_p->ifn_index, if_name, 605 ifn_index); 606 /* remove the address from the old ifn */ 607 sctp_remove_ifa_from_ifn(sctp_ifap); 608 /* move the address over to the new ifn */ 609 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 610 goto exit_stage_left; 611 } else { 612 /* repair ifnp which was NULL ? */ 613 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 614 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 615 sctp_ifnp, sctp_ifap); 616 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 617 } 618 goto exit_stage_left; 619 } 620 } 621 SCTP_IPI_ADDR_WUNLOCK(); 622 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 623 if (sctp_ifap == NULL) { 624 #ifdef INVARIANTS 625 panic("No memory for IFA"); 626 #endif 627 return (NULL); 628 } 629 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 630 sctp_ifap->ifn_p = sctp_ifnp; 631 atomic_add_int(&sctp_ifnp->refcount, 1); 632 sctp_ifap->vrf_id = vrf_id; 633 sctp_ifap->ifa = ifa; 634 memcpy(&sctp_ifap->address, addr, addr->sa_len); 635 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 636 sctp_ifap->flags = ifa_flags; 637 /* Set scope */ 638 switch (sctp_ifap->address.sa.sa_family) { 639 #ifdef INET 640 case AF_INET: 641 { 642 struct sockaddr_in *sin; 643 644 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 645 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 646 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 647 sctp_ifap->src_is_loop = 1; 648 } 649 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 650 sctp_ifap->src_is_priv = 1; 651 } 652 sctp_ifnp->num_v4++; 653 if (new_ifn_af) 654 new_ifn_af = AF_INET; 655 break; 656 } 657 #endif 658 #ifdef INET6 659 case AF_INET6: 660 { 661 /* ok to use deprecated addresses? */ 662 struct sockaddr_in6 *sin6; 663 664 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 665 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 666 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 667 sctp_ifap->src_is_loop = 1; 668 } 669 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 670 sctp_ifap->src_is_priv = 1; 671 } 672 sctp_ifnp->num_v6++; 673 if (new_ifn_af) 674 new_ifn_af = AF_INET6; 675 break; 676 } 677 #endif 678 default: 679 new_ifn_af = 0; 680 break; 681 } 682 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 683 684 if ((sctp_ifap->src_is_priv == 0) && 685 (sctp_ifap->src_is_loop == 0)) { 686 sctp_ifap->src_is_glob = 1; 687 } 688 SCTP_IPI_ADDR_WLOCK(); 689 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 690 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 691 sctp_ifap->refcount = 1; 692 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 693 sctp_ifnp->ifa_count++; 694 vrf->total_ifa_count++; 695 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 696 if (new_ifn_af) { 697 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 698 sctp_ifnp->registered_af = new_ifn_af; 699 } 700 SCTP_IPI_ADDR_WUNLOCK(); 701 if (dynamic_add) { 702 /* 703 * Bump up the refcount so that when the timer completes it 704 * will drop back down. 705 */ 706 struct sctp_laddr *wi; 707 708 atomic_add_int(&sctp_ifap->refcount, 1); 709 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 710 if (wi == NULL) { 711 /* 712 * Gak, what can we do? We have lost an address 713 * change can you say HOSED? 714 */ 715 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 716 /* Opps, must decrement the count */ 717 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 718 if_name); 719 return (NULL); 720 } 721 SCTP_INCR_LADDR_COUNT(); 722 bzero(wi, sizeof(*wi)); 723 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 724 wi->ifa = sctp_ifap; 725 wi->action = SCTP_ADD_IP_ADDRESS; 726 727 SCTP_WQ_ADDR_LOCK(); 728 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 729 SCTP_WQ_ADDR_UNLOCK(); 730 731 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 732 (struct sctp_inpcb *)NULL, 733 (struct sctp_tcb *)NULL, 734 (struct sctp_nets *)NULL); 735 } else { 736 /* it's ready for use */ 737 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 738 } 739 return (sctp_ifap); 740 } 741 742 void 743 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 744 uint32_t ifn_index, const char *if_name) 745 { 746 struct sctp_vrf *vrf; 747 struct sctp_ifa *sctp_ifap = NULL; 748 749 SCTP_IPI_ADDR_WLOCK(); 750 vrf = sctp_find_vrf(vrf_id); 751 if (vrf == NULL) { 752 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 753 goto out_now; 754 } 755 #ifdef SCTP_DEBUG 756 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 757 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 758 #endif 759 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 760 if (sctp_ifap) { 761 /* Validate the delete */ 762 if (sctp_ifap->ifn_p) { 763 int valid = 0; 764 765 /*- 766 * The name has priority over the ifn_index 767 * if its given. We do this especially for 768 * panda who might recycle indexes fast. 769 */ 770 if (if_name) { 771 int len1, len2; 772 773 len1 = min(SCTP_IFNAMSIZ, strlen(if_name)); 774 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name)); 775 if (len1 && len2 && (len1 == len2)) { 776 /* we can compare them */ 777 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) { 778 /* 779 * They match its a correct 780 * delete 781 */ 782 valid = 1; 783 } 784 } 785 } 786 if (!valid) { 787 /* last ditch check ifn_index */ 788 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 789 valid = 1; 790 } 791 } 792 if (!valid) { 793 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 794 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 795 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 796 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 797 SCTP_IPI_ADDR_WUNLOCK(); 798 return; 799 } 800 } 801 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap); 802 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 803 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 804 vrf->total_ifa_count--; 805 LIST_REMOVE(sctp_ifap, next_bucket); 806 sctp_remove_ifa_from_ifn(sctp_ifap); 807 } 808 #ifdef SCTP_DEBUG 809 else { 810 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 811 ifn_index); 812 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 813 } 814 #endif 815 816 out_now: 817 SCTP_IPI_ADDR_WUNLOCK(); 818 if (sctp_ifap) { 819 struct sctp_laddr *wi; 820 821 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 822 if (wi == NULL) { 823 /* 824 * Gak, what can we do? We have lost an address 825 * change can you say HOSED? 826 */ 827 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 828 829 /* Oops, must decrement the count */ 830 sctp_free_ifa(sctp_ifap); 831 return; 832 } 833 SCTP_INCR_LADDR_COUNT(); 834 bzero(wi, sizeof(*wi)); 835 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 836 wi->ifa = sctp_ifap; 837 wi->action = SCTP_DEL_IP_ADDRESS; 838 SCTP_WQ_ADDR_LOCK(); 839 /* 840 * Should this really be a tailq? As it is we will process 841 * the newest first :-0 842 */ 843 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 844 SCTP_WQ_ADDR_UNLOCK(); 845 846 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 847 (struct sctp_inpcb *)NULL, 848 (struct sctp_tcb *)NULL, 849 (struct sctp_nets *)NULL); 850 } 851 return; 852 } 853 854 855 static struct sctp_tcb * 856 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 857 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 858 { 859 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 860 /* 861 * If we support the TCP model, then we must now dig through to see 862 * if we can find our endpoint in the list of tcp ep's. 863 */ 864 uint16_t lport, rport; 865 struct sctppcbhead *ephead; 866 struct sctp_inpcb *inp; 867 struct sctp_laddr *laddr; 868 struct sctp_tcb *stcb; 869 struct sctp_nets *net; 870 871 if ((to == NULL) || (from == NULL)) { 872 return (NULL); 873 } 874 switch (to->sa_family) { 875 #ifdef INET 876 case AF_INET: 877 if (from->sa_family == AF_INET) { 878 lport = ((struct sockaddr_in *)to)->sin_port; 879 rport = ((struct sockaddr_in *)from)->sin_port; 880 } else { 881 return (NULL); 882 } 883 break; 884 #endif 885 #ifdef INET6 886 case AF_INET6: 887 if (from->sa_family == AF_INET6) { 888 lport = ((struct sockaddr_in6 *)to)->sin6_port; 889 rport = ((struct sockaddr_in6 *)from)->sin6_port; 890 } else { 891 return (NULL); 892 } 893 break; 894 #endif 895 default: 896 return (NULL); 897 } 898 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 899 /* 900 * Ok now for each of the guys in this bucket we must look and see: 901 * - Does the remote port match. - Does there single association's 902 * addresses match this address (to). If so we update p_ep to point 903 * to this ep and return the tcb from it. 904 */ 905 LIST_FOREACH(inp, ephead, sctp_hash) { 906 SCTP_INP_RLOCK(inp); 907 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 908 SCTP_INP_RUNLOCK(inp); 909 continue; 910 } 911 if (lport != inp->sctp_lport) { 912 SCTP_INP_RUNLOCK(inp); 913 continue; 914 } 915 if (inp->def_vrf_id != vrf_id) { 916 SCTP_INP_RUNLOCK(inp); 917 continue; 918 } 919 /* check to see if the ep has one of the addresses */ 920 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 921 /* We are NOT bound all, so look further */ 922 int match = 0; 923 924 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 925 926 if (laddr->ifa == NULL) { 927 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 928 continue; 929 } 930 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 931 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 932 continue; 933 } 934 if (laddr->ifa->address.sa.sa_family == 935 to->sa_family) { 936 /* see if it matches */ 937 938 #ifdef INET 939 if (from->sa_family == AF_INET) { 940 struct sockaddr_in *intf_addr, 941 *sin; 942 943 intf_addr = &laddr->ifa->address.sin; 944 sin = (struct sockaddr_in *)to; 945 if (sin->sin_addr.s_addr == 946 intf_addr->sin_addr.s_addr) { 947 match = 1; 948 break; 949 } 950 } 951 #endif 952 #ifdef INET6 953 if (from->sa_family == AF_INET6) { 954 struct sockaddr_in6 *intf_addr6; 955 struct sockaddr_in6 *sin6; 956 957 sin6 = (struct sockaddr_in6 *) 958 to; 959 intf_addr6 = &laddr->ifa->address.sin6; 960 961 if (SCTP6_ARE_ADDR_EQUAL(sin6, 962 intf_addr6)) { 963 match = 1; 964 break; 965 } 966 } 967 #endif 968 } 969 } 970 if (match == 0) { 971 /* This endpoint does not have this address */ 972 SCTP_INP_RUNLOCK(inp); 973 continue; 974 } 975 } 976 /* 977 * Ok if we hit here the ep has the address, does it hold 978 * the tcb? 979 */ 980 981 stcb = LIST_FIRST(&inp->sctp_asoc_list); 982 if (stcb == NULL) { 983 SCTP_INP_RUNLOCK(inp); 984 continue; 985 } 986 SCTP_TCB_LOCK(stcb); 987 if (stcb->rport != rport) { 988 /* remote port does not match. */ 989 SCTP_TCB_UNLOCK(stcb); 990 SCTP_INP_RUNLOCK(inp); 991 continue; 992 } 993 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 994 SCTP_TCB_UNLOCK(stcb); 995 SCTP_INP_RUNLOCK(inp); 996 continue; 997 } 998 /* Does this TCB have a matching address? */ 999 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1000 1001 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1002 /* not the same family, can't be a match */ 1003 continue; 1004 } 1005 switch (from->sa_family) { 1006 #ifdef INET 1007 case AF_INET: 1008 { 1009 struct sockaddr_in *sin, *rsin; 1010 1011 sin = (struct sockaddr_in *)&net->ro._l_addr; 1012 rsin = (struct sockaddr_in *)from; 1013 if (sin->sin_addr.s_addr == 1014 rsin->sin_addr.s_addr) { 1015 /* found it */ 1016 if (netp != NULL) { 1017 *netp = net; 1018 } 1019 /* 1020 * Update the endpoint 1021 * pointer 1022 */ 1023 *inp_p = inp; 1024 SCTP_INP_RUNLOCK(inp); 1025 return (stcb); 1026 } 1027 break; 1028 } 1029 #endif 1030 #ifdef INET6 1031 case AF_INET6: 1032 { 1033 struct sockaddr_in6 *sin6, *rsin6; 1034 1035 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1036 rsin6 = (struct sockaddr_in6 *)from; 1037 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1038 rsin6)) { 1039 /* found it */ 1040 if (netp != NULL) { 1041 *netp = net; 1042 } 1043 /* 1044 * Update the endpoint 1045 * pointer 1046 */ 1047 *inp_p = inp; 1048 SCTP_INP_RUNLOCK(inp); 1049 return (stcb); 1050 } 1051 break; 1052 } 1053 #endif 1054 default: 1055 /* TSNH */ 1056 break; 1057 } 1058 } 1059 SCTP_TCB_UNLOCK(stcb); 1060 SCTP_INP_RUNLOCK(inp); 1061 } 1062 return (NULL); 1063 } 1064 1065 static int 1066 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1067 { 1068 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 1069 int ipv4_addr_legal, ipv6_addr_legal; 1070 struct sctp_vrf *vrf; 1071 struct sctp_ifn *sctp_ifn; 1072 struct sctp_ifa *sctp_ifa; 1073 1074 loopback_scope = stcb->asoc.loopback_scope; 1075 ipv4_local_scope = stcb->asoc.ipv4_local_scope; 1076 local_scope = stcb->asoc.local_scope; 1077 site_scope = stcb->asoc.site_scope; 1078 ipv4_addr_legal = ipv6_addr_legal = 0; 1079 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1080 ipv6_addr_legal = 1; 1081 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) { 1082 ipv4_addr_legal = 1; 1083 } 1084 } else { 1085 ipv4_addr_legal = 1; 1086 } 1087 1088 SCTP_IPI_ADDR_RLOCK(); 1089 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1090 if (vrf == NULL) { 1091 /* no vrf, no addresses */ 1092 SCTP_IPI_ADDR_RUNLOCK(); 1093 return (0); 1094 } 1095 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1096 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1097 if ((loopback_scope == 0) && 1098 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1099 continue; 1100 } 1101 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1102 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 1103 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 1104 /* 1105 * We allow pending addresses, where 1106 * we have sent an asconf-add to be 1107 * considered valid. 1108 */ 1109 continue; 1110 } 1111 switch (sctp_ifa->address.sa.sa_family) { 1112 #ifdef INET 1113 case AF_INET: 1114 if (ipv4_addr_legal) { 1115 struct sockaddr_in *sin, 1116 *rsin; 1117 1118 sin = &sctp_ifa->address.sin; 1119 rsin = (struct sockaddr_in *)to; 1120 if ((ipv4_local_scope == 0) && 1121 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1122 continue; 1123 } 1124 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1125 SCTP_IPI_ADDR_RUNLOCK(); 1126 return (1); 1127 } 1128 } 1129 break; 1130 #endif 1131 #ifdef INET6 1132 case AF_INET6: 1133 if (ipv6_addr_legal) { 1134 struct sockaddr_in6 *sin6, 1135 *rsin6; 1136 1137 sin6 = &sctp_ifa->address.sin6; 1138 rsin6 = (struct sockaddr_in6 *)to; 1139 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1140 if (local_scope == 0) 1141 continue; 1142 if (sin6->sin6_scope_id == 0) { 1143 if (sa6_recoverscope(sin6) != 0) 1144 continue; 1145 } 1146 } 1147 if ((site_scope == 0) && 1148 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1149 continue; 1150 } 1151 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1152 SCTP_IPI_ADDR_RUNLOCK(); 1153 return (1); 1154 } 1155 } 1156 break; 1157 #endif 1158 default: 1159 /* TSNH */ 1160 break; 1161 } 1162 } 1163 } 1164 } else { 1165 struct sctp_laddr *laddr; 1166 1167 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1168 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 1169 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 1170 /* 1171 * We allow pending addresses, where we have 1172 * sent an asconf-add to be considered 1173 * valid. 1174 */ 1175 continue; 1176 } 1177 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 1178 continue; 1179 } 1180 switch (to->sa_family) { 1181 #ifdef INET 1182 case AF_INET: 1183 { 1184 struct sockaddr_in *sin, *rsin; 1185 1186 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 1187 rsin = (struct sockaddr_in *)to; 1188 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1189 SCTP_IPI_ADDR_RUNLOCK(); 1190 return (1); 1191 } 1192 break; 1193 } 1194 #endif 1195 #ifdef INET6 1196 case AF_INET6: 1197 { 1198 struct sockaddr_in6 *sin6, *rsin6; 1199 1200 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1201 rsin6 = (struct sockaddr_in6 *)to; 1202 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1203 SCTP_IPI_ADDR_RUNLOCK(); 1204 return (1); 1205 } 1206 break; 1207 } 1208 1209 #endif 1210 default: 1211 /* TSNH */ 1212 break; 1213 } 1214 1215 } 1216 } 1217 SCTP_IPI_ADDR_RUNLOCK(); 1218 return (0); 1219 } 1220 1221 /* 1222 * rules for use 1223 * 1224 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1225 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1226 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1227 * NULL. 1228 */ 1229 1230 struct sctp_tcb * 1231 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1232 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1233 { 1234 struct sctpasochead *head; 1235 struct sctp_inpcb *inp; 1236 struct sctp_tcb *stcb = NULL; 1237 struct sctp_nets *net; 1238 uint16_t rport; 1239 1240 inp = *inp_p; 1241 if (remote->sa_family == AF_INET) { 1242 rport = (((struct sockaddr_in *)remote)->sin_port); 1243 } else if (remote->sa_family == AF_INET6) { 1244 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1245 } else { 1246 return (NULL); 1247 } 1248 if (locked_tcb) { 1249 /* 1250 * UN-lock so we can do proper locking here this occurs when 1251 * called from load_addresses_from_init. 1252 */ 1253 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1254 SCTP_TCB_UNLOCK(locked_tcb); 1255 } 1256 SCTP_INP_INFO_RLOCK(); 1257 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1258 /*- 1259 * Now either this guy is our listener or it's the 1260 * connector. If it is the one that issued the connect, then 1261 * it's only chance is to be the first TCB in the list. If 1262 * it is the acceptor, then do the special_lookup to hash 1263 * and find the real inp. 1264 */ 1265 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1266 /* to is peer addr, from is my addr */ 1267 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1268 netp, inp->def_vrf_id); 1269 if ((stcb != NULL) && (locked_tcb == NULL)) { 1270 /* we have a locked tcb, lower refcount */ 1271 SCTP_INP_DECR_REF(inp); 1272 } 1273 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1274 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1275 SCTP_TCB_LOCK(locked_tcb); 1276 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1277 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1278 } 1279 SCTP_INP_INFO_RUNLOCK(); 1280 return (stcb); 1281 } else { 1282 SCTP_INP_WLOCK(inp); 1283 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1284 goto null_return; 1285 } 1286 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1287 if (stcb == NULL) { 1288 goto null_return; 1289 } 1290 SCTP_TCB_LOCK(stcb); 1291 1292 if (stcb->rport != rport) { 1293 /* remote port does not match. */ 1294 SCTP_TCB_UNLOCK(stcb); 1295 goto null_return; 1296 } 1297 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1298 SCTP_TCB_UNLOCK(stcb); 1299 goto null_return; 1300 } 1301 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1302 SCTP_TCB_UNLOCK(stcb); 1303 goto null_return; 1304 } 1305 /* now look at the list of remote addresses */ 1306 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1307 #ifdef INVARIANTS 1308 if (net == (TAILQ_NEXT(net, sctp_next))) { 1309 panic("Corrupt net list"); 1310 } 1311 #endif 1312 if (net->ro._l_addr.sa.sa_family != 1313 remote->sa_family) { 1314 /* not the same family */ 1315 continue; 1316 } 1317 switch (remote->sa_family) { 1318 #ifdef INET 1319 case AF_INET: 1320 { 1321 struct sockaddr_in *sin, 1322 *rsin; 1323 1324 sin = (struct sockaddr_in *) 1325 &net->ro._l_addr; 1326 rsin = (struct sockaddr_in *)remote; 1327 if (sin->sin_addr.s_addr == 1328 rsin->sin_addr.s_addr) { 1329 /* found it */ 1330 if (netp != NULL) { 1331 *netp = net; 1332 } 1333 if (locked_tcb == NULL) { 1334 SCTP_INP_DECR_REF(inp); 1335 } else if (locked_tcb != stcb) { 1336 SCTP_TCB_LOCK(locked_tcb); 1337 } 1338 if (locked_tcb) { 1339 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1340 } 1341 SCTP_INP_WUNLOCK(inp); 1342 SCTP_INP_INFO_RUNLOCK(); 1343 return (stcb); 1344 } 1345 break; 1346 } 1347 #endif 1348 #ifdef INET6 1349 case AF_INET6: 1350 { 1351 struct sockaddr_in6 *sin6, 1352 *rsin6; 1353 1354 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1355 rsin6 = (struct sockaddr_in6 *)remote; 1356 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1357 rsin6)) { 1358 /* found it */ 1359 if (netp != NULL) { 1360 *netp = net; 1361 } 1362 if (locked_tcb == NULL) { 1363 SCTP_INP_DECR_REF(inp); 1364 } else if (locked_tcb != stcb) { 1365 SCTP_TCB_LOCK(locked_tcb); 1366 } 1367 if (locked_tcb) { 1368 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1369 } 1370 SCTP_INP_WUNLOCK(inp); 1371 SCTP_INP_INFO_RUNLOCK(); 1372 return (stcb); 1373 } 1374 break; 1375 } 1376 #endif 1377 default: 1378 /* TSNH */ 1379 break; 1380 } 1381 } 1382 SCTP_TCB_UNLOCK(stcb); 1383 } 1384 } else { 1385 SCTP_INP_WLOCK(inp); 1386 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1387 goto null_return; 1388 } 1389 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1390 inp->sctp_hashmark)]; 1391 if (head == NULL) { 1392 goto null_return; 1393 } 1394 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1395 if (stcb->rport != rport) { 1396 /* remote port does not match */ 1397 continue; 1398 } 1399 SCTP_TCB_LOCK(stcb); 1400 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1401 SCTP_TCB_UNLOCK(stcb); 1402 continue; 1403 } 1404 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1405 SCTP_TCB_UNLOCK(stcb); 1406 continue; 1407 } 1408 /* now look at the list of remote addresses */ 1409 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1410 #ifdef INVARIANTS 1411 if (net == (TAILQ_NEXT(net, sctp_next))) { 1412 panic("Corrupt net list"); 1413 } 1414 #endif 1415 if (net->ro._l_addr.sa.sa_family != 1416 remote->sa_family) { 1417 /* not the same family */ 1418 continue; 1419 } 1420 switch (remote->sa_family) { 1421 #ifdef INET 1422 case AF_INET: 1423 { 1424 struct sockaddr_in *sin, 1425 *rsin; 1426 1427 sin = (struct sockaddr_in *) 1428 &net->ro._l_addr; 1429 rsin = (struct sockaddr_in *)remote; 1430 if (sin->sin_addr.s_addr == 1431 rsin->sin_addr.s_addr) { 1432 /* found it */ 1433 if (netp != NULL) { 1434 *netp = net; 1435 } 1436 if (locked_tcb == NULL) { 1437 SCTP_INP_DECR_REF(inp); 1438 } else if (locked_tcb != stcb) { 1439 SCTP_TCB_LOCK(locked_tcb); 1440 } 1441 if (locked_tcb) { 1442 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1443 } 1444 SCTP_INP_WUNLOCK(inp); 1445 SCTP_INP_INFO_RUNLOCK(); 1446 return (stcb); 1447 } 1448 break; 1449 } 1450 #endif 1451 #ifdef INET6 1452 case AF_INET6: 1453 { 1454 struct sockaddr_in6 *sin6, 1455 *rsin6; 1456 1457 sin6 = (struct sockaddr_in6 *) 1458 &net->ro._l_addr; 1459 rsin6 = (struct sockaddr_in6 *)remote; 1460 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1461 rsin6)) { 1462 /* found it */ 1463 if (netp != NULL) { 1464 *netp = net; 1465 } 1466 if (locked_tcb == NULL) { 1467 SCTP_INP_DECR_REF(inp); 1468 } else if (locked_tcb != stcb) { 1469 SCTP_TCB_LOCK(locked_tcb); 1470 } 1471 if (locked_tcb) { 1472 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1473 } 1474 SCTP_INP_WUNLOCK(inp); 1475 SCTP_INP_INFO_RUNLOCK(); 1476 return (stcb); 1477 } 1478 break; 1479 } 1480 #endif 1481 default: 1482 /* TSNH */ 1483 break; 1484 } 1485 } 1486 SCTP_TCB_UNLOCK(stcb); 1487 } 1488 } 1489 null_return: 1490 /* clean up for returning null */ 1491 if (locked_tcb) { 1492 SCTP_TCB_LOCK(locked_tcb); 1493 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1494 } 1495 SCTP_INP_WUNLOCK(inp); 1496 SCTP_INP_INFO_RUNLOCK(); 1497 /* not found */ 1498 return (NULL); 1499 } 1500 1501 /* 1502 * Find an association for a specific endpoint using the association id given 1503 * out in the COMM_UP notification 1504 */ 1505 1506 struct sctp_tcb * 1507 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1508 { 1509 /* 1510 * Use my the assoc_id to find a endpoint 1511 */ 1512 struct sctpasochead *head; 1513 struct sctp_tcb *stcb; 1514 uint32_t id; 1515 1516 if (inp == NULL) { 1517 SCTP_PRINTF("TSNH ep_associd\n"); 1518 return (NULL); 1519 } 1520 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1521 SCTP_PRINTF("TSNH ep_associd0\n"); 1522 return (NULL); 1523 } 1524 id = (uint32_t) asoc_id; 1525 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1526 if (head == NULL) { 1527 /* invalid id TSNH */ 1528 SCTP_PRINTF("TSNH ep_associd1\n"); 1529 return (NULL); 1530 } 1531 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1532 if (stcb->asoc.assoc_id == id) { 1533 if (inp != stcb->sctp_ep) { 1534 /* 1535 * some other guy has the same id active (id 1536 * collision ??). 1537 */ 1538 SCTP_PRINTF("TSNH ep_associd2\n"); 1539 continue; 1540 } 1541 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1542 continue; 1543 } 1544 if (want_lock) { 1545 SCTP_TCB_LOCK(stcb); 1546 } 1547 return (stcb); 1548 } 1549 } 1550 return (NULL); 1551 } 1552 1553 1554 struct sctp_tcb * 1555 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1556 { 1557 struct sctp_tcb *stcb; 1558 1559 SCTP_INP_RLOCK(inp); 1560 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1561 SCTP_INP_RUNLOCK(inp); 1562 return (stcb); 1563 } 1564 1565 1566 static struct sctp_inpcb * 1567 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1568 uint16_t lport, uint32_t vrf_id) 1569 { 1570 struct sctp_inpcb *inp; 1571 struct sctp_laddr *laddr; 1572 1573 #ifdef INET 1574 struct sockaddr_in *sin; 1575 1576 #endif 1577 #ifdef INET6 1578 struct sockaddr_in6 *sin6; 1579 struct sockaddr_in6 *intf_addr6; 1580 1581 #endif 1582 1583 int fnd; 1584 1585 /* 1586 * Endpoint probe expects that the INP_INFO is locked. 1587 */ 1588 #ifdef INET 1589 sin = NULL; 1590 #endif 1591 #ifdef INET6 1592 sin6 = NULL; 1593 #endif 1594 switch (nam->sa_family) { 1595 #ifdef INET 1596 case AF_INET: 1597 sin = (struct sockaddr_in *)nam; 1598 break; 1599 #endif 1600 #ifdef INET6 1601 case AF_INET6: 1602 sin6 = (struct sockaddr_in6 *)nam; 1603 break; 1604 #endif 1605 default: 1606 /* unsupported family */ 1607 return (NULL); 1608 } 1609 1610 if (head == NULL) 1611 return (NULL); 1612 1613 LIST_FOREACH(inp, head, sctp_hash) { 1614 SCTP_INP_RLOCK(inp); 1615 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1616 SCTP_INP_RUNLOCK(inp); 1617 continue; 1618 } 1619 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1620 (inp->sctp_lport == lport)) { 1621 /* got it */ 1622 #ifdef INET 1623 if ((nam->sa_family == AF_INET) && 1624 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1625 SCTP_IPV6_V6ONLY(inp)) { 1626 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1627 SCTP_INP_RUNLOCK(inp); 1628 continue; 1629 } 1630 #endif 1631 #ifdef INET6 1632 /* A V6 address and the endpoint is NOT bound V6 */ 1633 if (nam->sa_family == AF_INET6 && 1634 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1635 SCTP_INP_RUNLOCK(inp); 1636 continue; 1637 } 1638 #endif 1639 /* does a VRF id match? */ 1640 fnd = 0; 1641 if (inp->def_vrf_id == vrf_id) 1642 fnd = 1; 1643 1644 SCTP_INP_RUNLOCK(inp); 1645 if (!fnd) 1646 continue; 1647 return (inp); 1648 } 1649 SCTP_INP_RUNLOCK(inp); 1650 } 1651 switch (nam->sa_family) { 1652 #ifdef INET 1653 case AF_INET: 1654 if (sin->sin_addr.s_addr == INADDR_ANY) { 1655 /* Can't hunt for one that has no address specified */ 1656 return (NULL); 1657 } 1658 break; 1659 #endif 1660 #ifdef INET6 1661 case AF_INET6: 1662 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1663 /* Can't hunt for one that has no address specified */ 1664 return (NULL); 1665 } 1666 break; 1667 #endif 1668 default: 1669 break; 1670 } 1671 /* 1672 * ok, not bound to all so see if we can find a EP bound to this 1673 * address. 1674 */ 1675 LIST_FOREACH(inp, head, sctp_hash) { 1676 SCTP_INP_RLOCK(inp); 1677 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1678 SCTP_INP_RUNLOCK(inp); 1679 continue; 1680 } 1681 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1682 SCTP_INP_RUNLOCK(inp); 1683 continue; 1684 } 1685 /* 1686 * Ok this could be a likely candidate, look at all of its 1687 * addresses 1688 */ 1689 if (inp->sctp_lport != lport) { 1690 SCTP_INP_RUNLOCK(inp); 1691 continue; 1692 } 1693 /* does a VRF id match? */ 1694 fnd = 0; 1695 if (inp->def_vrf_id == vrf_id) 1696 fnd = 1; 1697 1698 if (!fnd) { 1699 SCTP_INP_RUNLOCK(inp); 1700 continue; 1701 } 1702 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1703 if (laddr->ifa == NULL) { 1704 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1705 __FUNCTION__); 1706 continue; 1707 } 1708 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1709 laddr->ifa); 1710 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1711 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1712 continue; 1713 } 1714 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1715 /* possible, see if it matches */ 1716 switch (nam->sa_family) { 1717 #ifdef INET 1718 case AF_INET: 1719 if (sin->sin_addr.s_addr == 1720 laddr->ifa->address.sin.sin_addr.s_addr) { 1721 SCTP_INP_RUNLOCK(inp); 1722 return (inp); 1723 } 1724 break; 1725 #endif 1726 #ifdef INET6 1727 case AF_INET6: 1728 intf_addr6 = &laddr->ifa->address.sin6; 1729 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1730 intf_addr6)) { 1731 SCTP_INP_RUNLOCK(inp); 1732 return (inp); 1733 } 1734 break; 1735 #endif 1736 } 1737 } 1738 } 1739 SCTP_INP_RUNLOCK(inp); 1740 } 1741 return (NULL); 1742 } 1743 1744 1745 static struct sctp_inpcb * 1746 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1747 { 1748 struct sctppcbhead *head; 1749 struct sctp_inpcb *t_inp; 1750 int fnd; 1751 1752 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1753 SCTP_BASE_INFO(hashmark))]; 1754 LIST_FOREACH(t_inp, head, sctp_hash) { 1755 if (t_inp->sctp_lport != lport) { 1756 continue; 1757 } 1758 /* is it in the VRF in question */ 1759 fnd = 0; 1760 if (t_inp->def_vrf_id == vrf_id) 1761 fnd = 1; 1762 if (!fnd) 1763 continue; 1764 1765 /* This one is in use. */ 1766 /* check the v6/v4 binding issue */ 1767 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1768 SCTP_IPV6_V6ONLY(t_inp)) { 1769 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1770 /* collision in V6 space */ 1771 return (t_inp); 1772 } else { 1773 /* inp is BOUND_V4 no conflict */ 1774 continue; 1775 } 1776 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1777 /* t_inp is bound v4 and v6, conflict always */ 1778 return (t_inp); 1779 } else { 1780 /* t_inp is bound only V4 */ 1781 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1782 SCTP_IPV6_V6ONLY(inp)) { 1783 /* no conflict */ 1784 continue; 1785 } 1786 /* else fall through to conflict */ 1787 } 1788 return (t_inp); 1789 } 1790 return (NULL); 1791 } 1792 1793 1794 int 1795 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1796 { 1797 /* For 1-2-1 with port reuse */ 1798 struct sctppcbhead *head; 1799 struct sctp_inpcb *tinp; 1800 1801 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1802 /* only works with port reuse on */ 1803 return (-1); 1804 } 1805 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1806 return (0); 1807 } 1808 SCTP_INP_RUNLOCK(inp); 1809 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1810 SCTP_BASE_INFO(hashmark))]; 1811 /* Kick out all non-listeners to the TCP hash */ 1812 LIST_FOREACH(tinp, head, sctp_hash) { 1813 if (tinp->sctp_lport != inp->sctp_lport) { 1814 continue; 1815 } 1816 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1817 continue; 1818 } 1819 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1820 continue; 1821 } 1822 if (tinp->sctp_socket->so_qlimit) { 1823 continue; 1824 } 1825 SCTP_INP_WLOCK(tinp); 1826 LIST_REMOVE(tinp, sctp_hash); 1827 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1828 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1829 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1830 SCTP_INP_WUNLOCK(tinp); 1831 } 1832 SCTP_INP_WLOCK(inp); 1833 /* Pull from where he was */ 1834 LIST_REMOVE(inp, sctp_hash); 1835 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1836 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1837 LIST_INSERT_HEAD(head, inp, sctp_hash); 1838 SCTP_INP_WUNLOCK(inp); 1839 SCTP_INP_RLOCK(inp); 1840 return (0); 1841 } 1842 1843 1844 struct sctp_inpcb * 1845 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1846 uint32_t vrf_id) 1847 { 1848 /* 1849 * First we check the hash table to see if someone has this port 1850 * bound with just the port. 1851 */ 1852 struct sctp_inpcb *inp; 1853 struct sctppcbhead *head; 1854 int lport; 1855 unsigned int i; 1856 1857 #ifdef INET 1858 struct sockaddr_in *sin; 1859 1860 #endif 1861 #ifdef INET6 1862 struct sockaddr_in6 *sin6; 1863 1864 #endif 1865 1866 switch (nam->sa_family) { 1867 #ifdef INET 1868 case AF_INET: 1869 sin = (struct sockaddr_in *)nam; 1870 lport = ((struct sockaddr_in *)nam)->sin_port; 1871 break; 1872 #endif 1873 #ifdef INET6 1874 case AF_INET6: 1875 sin6 = (struct sockaddr_in6 *)nam; 1876 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1877 break; 1878 #endif 1879 default: 1880 return (NULL); 1881 } 1882 /* 1883 * I could cheat here and just cast to one of the types but we will 1884 * do it right. It also provides the check against an Unsupported 1885 * type too. 1886 */ 1887 /* Find the head of the ALLADDR chain */ 1888 if (have_lock == 0) { 1889 SCTP_INP_INFO_RLOCK(); 1890 } 1891 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1892 SCTP_BASE_INFO(hashmark))]; 1893 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1894 1895 /* 1896 * If the TCP model exists it could be that the main listening 1897 * endpoint is gone but there still exists a connected socket for 1898 * this guy. If so we can return the first one that we find. This 1899 * may NOT be the correct one so the caller should be wary on the 1900 * returned INP. Currently the only caller that sets find_tcp_pool 1901 * is in bindx where we are verifying that a user CAN bind the 1902 * address. He either has bound it already, or someone else has, or 1903 * its open to bind, so this is good enough. 1904 */ 1905 if (inp == NULL && find_tcp_pool) { 1906 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1907 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1908 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1909 if (inp) { 1910 break; 1911 } 1912 } 1913 } 1914 if (inp) { 1915 SCTP_INP_INCR_REF(inp); 1916 } 1917 if (have_lock == 0) { 1918 SCTP_INP_INFO_RUNLOCK(); 1919 } 1920 return (inp); 1921 } 1922 1923 /* 1924 * Find an association for an endpoint with the pointer to whom you want to 1925 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1926 * need to change the *to to some other struct like a mbuf... 1927 */ 1928 struct sctp_tcb * 1929 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1930 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1931 uint32_t vrf_id) 1932 { 1933 struct sctp_inpcb *inp = NULL; 1934 struct sctp_tcb *retval; 1935 1936 SCTP_INP_INFO_RLOCK(); 1937 if (find_tcp_pool) { 1938 if (inp_p != NULL) { 1939 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1940 vrf_id); 1941 } else { 1942 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1943 vrf_id); 1944 } 1945 if (retval != NULL) { 1946 SCTP_INP_INFO_RUNLOCK(); 1947 return (retval); 1948 } 1949 } 1950 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1951 if (inp_p != NULL) { 1952 *inp_p = inp; 1953 } 1954 SCTP_INP_INFO_RUNLOCK(); 1955 1956 if (inp == NULL) { 1957 return (NULL); 1958 } 1959 /* 1960 * ok, we have an endpoint, now lets find the assoc for it (if any) 1961 * we now place the source address or from in the to of the find 1962 * endpoint call. Since in reality this chain is used from the 1963 * inbound packet side. 1964 */ 1965 if (inp_p != NULL) { 1966 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1967 NULL); 1968 } else { 1969 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1970 NULL); 1971 } 1972 return retval; 1973 } 1974 1975 1976 /* 1977 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1978 * find all addresses that the sender has specified in any address list. Each 1979 * address will be used to lookup the TCB and see if one exits. 1980 */ 1981 static struct sctp_tcb * 1982 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1983 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1984 struct sockaddr *dest) 1985 { 1986 struct sctp_paramhdr *phdr, parm_buf; 1987 struct sctp_tcb *retval; 1988 uint32_t ptype, plen; 1989 1990 #ifdef INET 1991 struct sockaddr_in sin4; 1992 1993 #endif 1994 #ifdef INET6 1995 struct sockaddr_in6 sin6; 1996 1997 #endif 1998 1999 #ifdef INET 2000 memset(&sin4, 0, sizeof(sin4)); 2001 sin4.sin_len = sizeof(sin4); 2002 sin4.sin_family = AF_INET; 2003 sin4.sin_port = sh->src_port; 2004 #endif 2005 #ifdef INET6 2006 memset(&sin6, 0, sizeof(sin6)); 2007 sin6.sin6_len = sizeof(sin6); 2008 sin6.sin6_family = AF_INET6; 2009 sin6.sin6_port = sh->src_port; 2010 #endif 2011 2012 retval = NULL; 2013 offset += sizeof(struct sctp_init_chunk); 2014 2015 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2016 while (phdr != NULL) { 2017 /* now we must see if we want the parameter */ 2018 ptype = ntohs(phdr->param_type); 2019 plen = ntohs(phdr->param_length); 2020 if (plen == 0) { 2021 break; 2022 } 2023 #ifdef INET 2024 if (ptype == SCTP_IPV4_ADDRESS && 2025 plen == sizeof(struct sctp_ipv4addr_param)) { 2026 /* Get the rest of the address */ 2027 struct sctp_ipv4addr_param ip4_parm, *p4; 2028 2029 phdr = sctp_get_next_param(m, offset, 2030 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2031 if (phdr == NULL) { 2032 return (NULL); 2033 } 2034 p4 = (struct sctp_ipv4addr_param *)phdr; 2035 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2036 /* look it up */ 2037 retval = sctp_findassociation_ep_addr(inp_p, 2038 (struct sockaddr *)&sin4, netp, dest, NULL); 2039 if (retval != NULL) { 2040 return (retval); 2041 } 2042 } 2043 #endif 2044 #ifdef INET6 2045 if (ptype == SCTP_IPV6_ADDRESS && 2046 plen == sizeof(struct sctp_ipv6addr_param)) { 2047 /* Get the rest of the address */ 2048 struct sctp_ipv6addr_param ip6_parm, *p6; 2049 2050 phdr = sctp_get_next_param(m, offset, 2051 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2052 if (phdr == NULL) { 2053 return (NULL); 2054 } 2055 p6 = (struct sctp_ipv6addr_param *)phdr; 2056 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2057 /* look it up */ 2058 retval = sctp_findassociation_ep_addr(inp_p, 2059 (struct sockaddr *)&sin6, netp, dest, NULL); 2060 if (retval != NULL) { 2061 return (retval); 2062 } 2063 } 2064 #endif 2065 offset += SCTP_SIZE32(plen); 2066 phdr = sctp_get_next_param(m, offset, &parm_buf, 2067 sizeof(parm_buf)); 2068 } 2069 return (NULL); 2070 } 2071 2072 static struct sctp_tcb * 2073 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2074 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2075 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2076 { 2077 /* 2078 * Use my vtag to hash. If we find it we then verify the source addr 2079 * is in the assoc. If all goes well we save a bit on rec of a 2080 * packet. 2081 */ 2082 struct sctpasochead *head; 2083 struct sctp_nets *net; 2084 struct sctp_tcb *stcb; 2085 2086 *netp = NULL; 2087 *inp_p = NULL; 2088 SCTP_INP_INFO_RLOCK(); 2089 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2090 SCTP_BASE_INFO(hashasocmark))]; 2091 if (head == NULL) { 2092 /* invalid vtag */ 2093 SCTP_INP_INFO_RUNLOCK(); 2094 return (NULL); 2095 } 2096 LIST_FOREACH(stcb, head, sctp_asocs) { 2097 SCTP_INP_RLOCK(stcb->sctp_ep); 2098 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2099 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2100 continue; 2101 } 2102 SCTP_TCB_LOCK(stcb); 2103 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2104 if (stcb->asoc.my_vtag == vtag) { 2105 /* candidate */ 2106 if (stcb->rport != rport) { 2107 SCTP_TCB_UNLOCK(stcb); 2108 continue; 2109 } 2110 if (stcb->sctp_ep->sctp_lport != lport) { 2111 SCTP_TCB_UNLOCK(stcb); 2112 continue; 2113 } 2114 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2115 SCTP_TCB_UNLOCK(stcb); 2116 continue; 2117 } 2118 /* RRS:Need toaddr check here */ 2119 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2120 /* Endpoint does not own this address */ 2121 SCTP_TCB_UNLOCK(stcb); 2122 continue; 2123 } 2124 if (remote_tag) { 2125 /* 2126 * If we have both vtags that's all we match 2127 * on 2128 */ 2129 if (stcb->asoc.peer_vtag == remote_tag) { 2130 /* 2131 * If both tags match we consider it 2132 * conclusive and check NO 2133 * source/destination addresses 2134 */ 2135 goto conclusive; 2136 } 2137 } 2138 if (skip_src_check) { 2139 conclusive: 2140 if (from) { 2141 net = sctp_findnet(stcb, from); 2142 } else { 2143 *netp = NULL; /* unknown */ 2144 } 2145 if (inp_p) 2146 *inp_p = stcb->sctp_ep; 2147 SCTP_INP_INFO_RUNLOCK(); 2148 return (stcb); 2149 } 2150 net = sctp_findnet(stcb, from); 2151 if (net) { 2152 /* yep its him. */ 2153 *netp = net; 2154 SCTP_STAT_INCR(sctps_vtagexpress); 2155 *inp_p = stcb->sctp_ep; 2156 SCTP_INP_INFO_RUNLOCK(); 2157 return (stcb); 2158 } else { 2159 /* 2160 * not him, this should only happen in rare 2161 * cases so I peg it. 2162 */ 2163 SCTP_STAT_INCR(sctps_vtagbogus); 2164 } 2165 } 2166 SCTP_TCB_UNLOCK(stcb); 2167 } 2168 SCTP_INP_INFO_RUNLOCK(); 2169 return (NULL); 2170 } 2171 2172 /* 2173 * Find an association with the pointer to the inbound IP packet. This can be 2174 * a IPv4 or IPv6 packet. 2175 */ 2176 struct sctp_tcb * 2177 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 2178 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2179 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2180 { 2181 int find_tcp_pool; 2182 struct ip *iph; 2183 struct sctp_tcb *retval; 2184 struct sockaddr_storage to_store, from_store; 2185 struct sockaddr *to = (struct sockaddr *)&to_store; 2186 struct sockaddr *from = (struct sockaddr *)&from_store; 2187 struct sctp_inpcb *inp; 2188 2189 iph = mtod(m, struct ip *); 2190 switch (iph->ip_v) { 2191 #ifdef INET 2192 case IPVERSION: 2193 { 2194 /* its IPv4 */ 2195 struct sockaddr_in *from4; 2196 2197 from4 = (struct sockaddr_in *)&from_store; 2198 bzero(from4, sizeof(*from4)); 2199 from4->sin_family = AF_INET; 2200 from4->sin_len = sizeof(struct sockaddr_in); 2201 from4->sin_addr.s_addr = iph->ip_src.s_addr; 2202 from4->sin_port = sh->src_port; 2203 break; 2204 } 2205 #endif 2206 #ifdef INET6 2207 case IPV6_VERSION >> 4: 2208 { 2209 /* its IPv6 */ 2210 struct ip6_hdr *ip6; 2211 struct sockaddr_in6 *from6; 2212 2213 ip6 = mtod(m, struct ip6_hdr *); 2214 from6 = (struct sockaddr_in6 *)&from_store; 2215 bzero(from6, sizeof(*from6)); 2216 from6->sin6_family = AF_INET6; 2217 from6->sin6_len = sizeof(struct sockaddr_in6); 2218 from6->sin6_addr = ip6->ip6_src; 2219 from6->sin6_port = sh->src_port; 2220 /* Get the scopes in properly to the sin6 addr's */ 2221 /* we probably don't need these operations */ 2222 (void)sa6_recoverscope(from6); 2223 sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone)); 2224 break; 2225 } 2226 #endif 2227 default: 2228 /* Currently not supported. */ 2229 return (NULL); 2230 } 2231 2232 2233 switch (iph->ip_v) { 2234 #ifdef INET 2235 case IPVERSION: 2236 { 2237 /* its IPv4 */ 2238 struct sockaddr_in *to4; 2239 2240 to4 = (struct sockaddr_in *)&to_store; 2241 bzero(to4, sizeof(*to4)); 2242 to4->sin_family = AF_INET; 2243 to4->sin_len = sizeof(struct sockaddr_in); 2244 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 2245 to4->sin_port = sh->dest_port; 2246 break; 2247 } 2248 #endif 2249 #ifdef INET6 2250 case IPV6_VERSION >> 4: 2251 { 2252 /* its IPv6 */ 2253 struct ip6_hdr *ip6; 2254 struct sockaddr_in6 *to6; 2255 2256 ip6 = mtod(m, struct ip6_hdr *); 2257 to6 = (struct sockaddr_in6 *)&to_store; 2258 bzero(to6, sizeof(*to6)); 2259 to6->sin6_family = AF_INET6; 2260 to6->sin6_len = sizeof(struct sockaddr_in6); 2261 to6->sin6_addr = ip6->ip6_dst; 2262 to6->sin6_port = sh->dest_port; 2263 /* Get the scopes in properly to the sin6 addr's */ 2264 /* we probably don't need these operations */ 2265 (void)sa6_recoverscope(to6); 2266 sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone)); 2267 break; 2268 } 2269 #endif 2270 default: 2271 /* TSNH */ 2272 break; 2273 } 2274 if (sh->v_tag) { 2275 /* we only go down this path if vtag is non-zero */ 2276 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag), 2277 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2278 if (retval) { 2279 return (retval); 2280 } 2281 } 2282 find_tcp_pool = 0; 2283 if ((ch->chunk_type != SCTP_INITIATION) && 2284 (ch->chunk_type != SCTP_INITIATION_ACK) && 2285 (ch->chunk_type != SCTP_COOKIE_ACK) && 2286 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2287 /* Other chunk types go to the tcp pool. */ 2288 find_tcp_pool = 1; 2289 } 2290 if (inp_p) { 2291 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 2292 find_tcp_pool, vrf_id); 2293 inp = *inp_p; 2294 } else { 2295 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 2296 find_tcp_pool, vrf_id); 2297 } 2298 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2299 if (retval == NULL && inp) { 2300 /* Found a EP but not this address */ 2301 if ((ch->chunk_type == SCTP_INITIATION) || 2302 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2303 /*- 2304 * special hook, we do NOT return linp or an 2305 * association that is linked to an existing 2306 * association that is under the TCP pool (i.e. no 2307 * listener exists). The endpoint finding routine 2308 * will always find a listener before examining the 2309 * TCP pool. 2310 */ 2311 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2312 if (inp_p) { 2313 *inp_p = NULL; 2314 } 2315 return (NULL); 2316 } 2317 retval = sctp_findassociation_special_addr(m, iphlen, 2318 offset, sh, &inp, netp, to); 2319 if (inp_p != NULL) { 2320 *inp_p = inp; 2321 } 2322 } 2323 } 2324 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2325 return (retval); 2326 } 2327 2328 /* 2329 * lookup an association by an ASCONF lookup address. 2330 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2331 */ 2332 struct sctp_tcb * 2333 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 2334 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2335 { 2336 struct sctp_tcb *stcb; 2337 struct sockaddr_storage local_store, remote_store; 2338 struct sockaddr *to; 2339 struct ip *iph; 2340 struct sctp_paramhdr parm_buf, *phdr; 2341 int ptype; 2342 int zero_address = 0; 2343 2344 #ifdef INET 2345 struct sockaddr_in *sin; 2346 2347 #endif 2348 #ifdef INET6 2349 struct ip6_hdr *ip6; 2350 struct sockaddr_in6 *sin6; 2351 2352 #endif 2353 2354 memset(&local_store, 0, sizeof(local_store)); 2355 memset(&remote_store, 0, sizeof(remote_store)); 2356 to = (struct sockaddr *)&local_store; 2357 /* First get the destination address setup too. */ 2358 iph = mtod(m, struct ip *); 2359 switch (iph->ip_v) { 2360 #ifdef INET 2361 case IPVERSION: 2362 /* its IPv4 */ 2363 sin = (struct sockaddr_in *)&local_store; 2364 sin->sin_family = AF_INET; 2365 sin->sin_len = sizeof(*sin); 2366 sin->sin_port = sh->dest_port; 2367 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 2368 break; 2369 #endif 2370 #ifdef INET6 2371 case IPV6_VERSION >> 4: 2372 /* its IPv6 */ 2373 ip6 = mtod(m, struct ip6_hdr *); 2374 sin6 = (struct sockaddr_in6 *)&local_store; 2375 sin6->sin6_family = AF_INET6; 2376 sin6->sin6_len = sizeof(*sin6); 2377 sin6->sin6_port = sh->dest_port; 2378 sin6->sin6_addr = ip6->ip6_dst; 2379 break; 2380 #endif 2381 default: 2382 return NULL; 2383 } 2384 2385 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2386 &parm_buf, sizeof(struct sctp_paramhdr)); 2387 if (phdr == NULL) { 2388 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2389 __FUNCTION__); 2390 return NULL; 2391 } 2392 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2393 /* get the correlation address */ 2394 switch (ptype) { 2395 #ifdef INET6 2396 case SCTP_IPV6_ADDRESS: 2397 { 2398 /* ipv6 address param */ 2399 struct sctp_ipv6addr_param *p6, p6_buf; 2400 2401 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2402 return NULL; 2403 } 2404 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2405 offset + sizeof(struct sctp_asconf_chunk), 2406 &p6_buf.ph, sizeof(*p6)); 2407 if (p6 == NULL) { 2408 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2409 __FUNCTION__); 2410 return (NULL); 2411 } 2412 sin6 = (struct sockaddr_in6 *)&remote_store; 2413 sin6->sin6_family = AF_INET6; 2414 sin6->sin6_len = sizeof(*sin6); 2415 sin6->sin6_port = sh->src_port; 2416 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2417 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2418 zero_address = 1; 2419 break; 2420 } 2421 #endif 2422 #ifdef INET 2423 case SCTP_IPV4_ADDRESS: 2424 { 2425 /* ipv4 address param */ 2426 struct sctp_ipv4addr_param *p4, p4_buf; 2427 2428 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2429 return NULL; 2430 } 2431 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2432 offset + sizeof(struct sctp_asconf_chunk), 2433 &p4_buf.ph, sizeof(*p4)); 2434 if (p4 == NULL) { 2435 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2436 __FUNCTION__); 2437 return (NULL); 2438 } 2439 sin = (struct sockaddr_in *)&remote_store; 2440 sin->sin_family = AF_INET; 2441 sin->sin_len = sizeof(*sin); 2442 sin->sin_port = sh->src_port; 2443 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2444 if (sin->sin_addr.s_addr == INADDR_ANY) 2445 zero_address = 1; 2446 break; 2447 } 2448 #endif 2449 default: 2450 /* invalid address param type */ 2451 return NULL; 2452 } 2453 2454 if (zero_address) { 2455 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p, 2456 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2457 /* 2458 * printf("findassociation_ep_asconf: zero lookup address 2459 * finds stcb 0x%x\n", (uint32_t)stcb); 2460 */ 2461 } else { 2462 stcb = sctp_findassociation_ep_addr(inp_p, 2463 (struct sockaddr *)&remote_store, netp, 2464 to, NULL); 2465 } 2466 return (stcb); 2467 } 2468 2469 2470 /* 2471 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2472 * addresses. This way if we don't get a bind we by default pick a ephemeral 2473 * port with all addresses bound. 2474 */ 2475 int 2476 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2477 { 2478 /* 2479 * we get called when a new endpoint starts up. We need to allocate 2480 * the sctp_inpcb structure from the zone and init it. Mark it as 2481 * unbound and find a port that we can use as an ephemeral with 2482 * INADDR_ANY. If the user binds later no problem we can then add in 2483 * the specific addresses. And setup the default parameters for the 2484 * EP. 2485 */ 2486 int i, error; 2487 struct sctp_inpcb *inp; 2488 struct sctp_pcb *m; 2489 struct timeval time; 2490 sctp_sharedkey_t *null_key; 2491 2492 error = 0; 2493 2494 SCTP_INP_INFO_WLOCK(); 2495 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2496 if (inp == NULL) { 2497 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2498 SCTP_INP_INFO_WUNLOCK(); 2499 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2500 return (ENOBUFS); 2501 } 2502 /* zap it */ 2503 bzero(inp, sizeof(*inp)); 2504 2505 /* bump generations */ 2506 /* setup socket pointers */ 2507 inp->sctp_socket = so; 2508 inp->ip_inp.inp.inp_socket = so; 2509 #ifdef INET6 2510 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2511 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2512 } 2513 #endif 2514 inp->sctp_associd_counter = 1; 2515 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2516 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2517 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2518 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2519 /* init the small hash table we use to track asocid <-> tcb */ 2520 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2521 if (inp->sctp_asocidhash == NULL) { 2522 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2523 SCTP_INP_INFO_WUNLOCK(); 2524 return (ENOBUFS); 2525 } 2526 #ifdef IPSEC 2527 { 2528 struct inpcbpolicy *pcb_sp = NULL; 2529 2530 error = ipsec_init_policy(so, &pcb_sp); 2531 /* Arrange to share the policy */ 2532 inp->ip_inp.inp.inp_sp = pcb_sp; 2533 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2534 } 2535 if (error != 0) { 2536 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2537 SCTP_INP_INFO_WUNLOCK(); 2538 return error; 2539 } 2540 #endif /* IPSEC */ 2541 SCTP_INCR_EP_COUNT(); 2542 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2543 SCTP_INP_INFO_WUNLOCK(); 2544 2545 so->so_pcb = (caddr_t)inp; 2546 2547 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2548 /* UDP style socket */ 2549 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2550 SCTP_PCB_FLAGS_UNBOUND); 2551 /* Be sure it is NON-BLOCKING IO for UDP */ 2552 /* SCTP_SET_SO_NBIO(so); */ 2553 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2554 /* TCP style socket */ 2555 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2556 SCTP_PCB_FLAGS_UNBOUND); 2557 /* Be sure we have blocking IO by default */ 2558 SCTP_CLEAR_SO_NBIO(so); 2559 } else { 2560 /* 2561 * unsupported socket type (RAW, etc)- in case we missed it 2562 * in protosw 2563 */ 2564 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2565 so->so_pcb = NULL; 2566 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2567 return (EOPNOTSUPP); 2568 } 2569 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2570 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2571 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2572 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2573 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2574 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2575 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2576 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2577 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2578 } 2579 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2580 &inp->sctp_hashmark); 2581 if (inp->sctp_tcbhash == NULL) { 2582 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2583 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2584 so->so_pcb = NULL; 2585 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2586 return (ENOBUFS); 2587 } 2588 inp->def_vrf_id = vrf_id; 2589 2590 SCTP_INP_INFO_WLOCK(); 2591 SCTP_INP_LOCK_INIT(inp); 2592 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2593 SCTP_INP_READ_INIT(inp); 2594 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2595 /* lock the new ep */ 2596 SCTP_INP_WLOCK(inp); 2597 2598 /* add it to the info area */ 2599 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2600 SCTP_INP_INFO_WUNLOCK(); 2601 2602 TAILQ_INIT(&inp->read_queue); 2603 LIST_INIT(&inp->sctp_addr_list); 2604 2605 LIST_INIT(&inp->sctp_asoc_list); 2606 2607 #ifdef SCTP_TRACK_FREED_ASOCS 2608 /* TEMP CODE */ 2609 LIST_INIT(&inp->sctp_asoc_free_list); 2610 #endif 2611 /* Init the timer structure for signature change */ 2612 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2613 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2614 2615 /* now init the actual endpoint default data */ 2616 m = &inp->sctp_ep; 2617 2618 /* setup the base timeout information */ 2619 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2620 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2621 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2622 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2623 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2624 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2625 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2626 /* all max/min max are in ms */ 2627 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2628 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2629 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2630 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2631 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2632 2633 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2634 2635 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2636 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2637 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2638 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2639 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2640 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2641 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2642 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2643 2644 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2645 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2646 /* number of streams to pre-open on a association */ 2647 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2648 2649 /* Add adaptation cookie */ 2650 m->adaptation_layer_indicator = 0x504C5253; 2651 2652 /* seed random number generator */ 2653 m->random_counter = 1; 2654 m->store_at = SCTP_SIGNATURE_SIZE; 2655 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2656 sctp_fill_random_store(m); 2657 2658 /* Minimum cookie size */ 2659 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2660 sizeof(struct sctp_state_cookie); 2661 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2662 2663 /* Setup the initial secret */ 2664 (void)SCTP_GETTIME_TIMEVAL(&time); 2665 m->time_of_secret_change = time.tv_sec; 2666 2667 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2668 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2669 } 2670 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2671 2672 /* How long is a cookie good for ? */ 2673 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2674 /* 2675 * Initialize authentication parameters 2676 */ 2677 m->local_hmacs = sctp_default_supported_hmaclist(); 2678 m->local_auth_chunks = sctp_alloc_chunklist(); 2679 m->default_dscp = 0; 2680 #ifdef INET6 2681 m->default_flowlabel = 0; 2682 #endif 2683 sctp_auth_set_default_chunks(m->local_auth_chunks); 2684 LIST_INIT(&m->shared_keys); 2685 /* add default NULL key as key id 0 */ 2686 null_key = sctp_alloc_sharedkey(); 2687 sctp_insert_sharedkey(&m->shared_keys, null_key); 2688 SCTP_INP_WUNLOCK(inp); 2689 #ifdef SCTP_LOG_CLOSING 2690 sctp_log_closing(inp, NULL, 12); 2691 #endif 2692 return (error); 2693 } 2694 2695 2696 void 2697 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2698 struct sctp_tcb *stcb) 2699 { 2700 struct sctp_nets *net; 2701 uint16_t lport, rport; 2702 struct sctppcbhead *head; 2703 struct sctp_laddr *laddr, *oladdr; 2704 2705 atomic_add_int(&stcb->asoc.refcnt, 1); 2706 SCTP_TCB_UNLOCK(stcb); 2707 SCTP_INP_INFO_WLOCK(); 2708 SCTP_INP_WLOCK(old_inp); 2709 SCTP_INP_WLOCK(new_inp); 2710 SCTP_TCB_LOCK(stcb); 2711 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2712 2713 new_inp->sctp_ep.time_of_secret_change = 2714 old_inp->sctp_ep.time_of_secret_change; 2715 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2716 sizeof(old_inp->sctp_ep.secret_key)); 2717 new_inp->sctp_ep.current_secret_number = 2718 old_inp->sctp_ep.current_secret_number; 2719 new_inp->sctp_ep.last_secret_number = 2720 old_inp->sctp_ep.last_secret_number; 2721 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2722 2723 /* make it so new data pours into the new socket */ 2724 stcb->sctp_socket = new_inp->sctp_socket; 2725 stcb->sctp_ep = new_inp; 2726 2727 /* Copy the port across */ 2728 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2729 rport = stcb->rport; 2730 /* Pull the tcb from the old association */ 2731 LIST_REMOVE(stcb, sctp_tcbhash); 2732 LIST_REMOVE(stcb, sctp_tcblist); 2733 if (stcb->asoc.in_asocid_hash) { 2734 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2735 } 2736 /* Now insert the new_inp into the TCP connected hash */ 2737 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2738 2739 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2740 /* Its safe to access */ 2741 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2742 2743 /* Now move the tcb into the endpoint list */ 2744 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2745 /* 2746 * Question, do we even need to worry about the ep-hash since we 2747 * only have one connection? Probably not :> so lets get rid of it 2748 * and not suck up any kernel memory in that. 2749 */ 2750 if (stcb->asoc.in_asocid_hash) { 2751 struct sctpasochead *lhd; 2752 2753 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2754 new_inp->hashasocidmark)]; 2755 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2756 } 2757 /* Ok. Let's restart timer. */ 2758 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2759 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2760 stcb, net); 2761 } 2762 2763 SCTP_INP_INFO_WUNLOCK(); 2764 if (new_inp->sctp_tcbhash != NULL) { 2765 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2766 new_inp->sctp_tcbhash = NULL; 2767 } 2768 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2769 /* Subset bound, so copy in the laddr list from the old_inp */ 2770 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2771 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2772 if (laddr == NULL) { 2773 /* 2774 * Gak, what can we do? This assoc is really 2775 * HOSED. We probably should send an abort 2776 * here. 2777 */ 2778 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2779 continue; 2780 } 2781 SCTP_INCR_LADDR_COUNT(); 2782 bzero(laddr, sizeof(*laddr)); 2783 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2784 laddr->ifa = oladdr->ifa; 2785 atomic_add_int(&laddr->ifa->refcount, 1); 2786 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2787 sctp_nxt_addr); 2788 new_inp->laddr_count++; 2789 if (oladdr == stcb->asoc.last_used_address) { 2790 stcb->asoc.last_used_address = laddr; 2791 } 2792 } 2793 } 2794 /* 2795 * Now any running timers need to be adjusted since we really don't 2796 * care if they are running or not just blast in the new_inp into 2797 * all of them. 2798 */ 2799 2800 stcb->asoc.dack_timer.ep = (void *)new_inp; 2801 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2802 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2803 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2804 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2805 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2806 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2807 /* now what about the nets? */ 2808 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2809 net->pmtu_timer.ep = (void *)new_inp; 2810 net->hb_timer.ep = (void *)new_inp; 2811 net->rxt_timer.ep = (void *)new_inp; 2812 } 2813 SCTP_INP_WUNLOCK(new_inp); 2814 SCTP_INP_WUNLOCK(old_inp); 2815 } 2816 2817 2818 2819 2820 /* sctp_ifap is used to bypass normal local address validation checks */ 2821 int 2822 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2823 struct sctp_ifa *sctp_ifap, struct thread *p) 2824 { 2825 /* bind a ep to a socket address */ 2826 struct sctppcbhead *head; 2827 struct sctp_inpcb *inp, *inp_tmp; 2828 struct inpcb *ip_inp; 2829 int port_reuse_active = 0; 2830 int bindall; 2831 uint16_t lport; 2832 int error; 2833 uint32_t vrf_id; 2834 2835 lport = 0; 2836 error = 0; 2837 bindall = 1; 2838 inp = (struct sctp_inpcb *)so->so_pcb; 2839 ip_inp = (struct inpcb *)so->so_pcb; 2840 #ifdef SCTP_DEBUG 2841 if (addr) { 2842 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2843 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2844 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2845 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2846 } 2847 #endif 2848 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2849 /* already did a bind, subsequent binds NOT allowed ! */ 2850 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2851 return (EINVAL); 2852 } 2853 #ifdef INVARIANTS 2854 if (p == NULL) 2855 panic("null proc/thread"); 2856 #endif 2857 if (addr != NULL) { 2858 switch (addr->sa_family) { 2859 #ifdef INET 2860 case AF_INET: 2861 { 2862 struct sockaddr_in *sin; 2863 2864 /* IPV6_V6ONLY socket? */ 2865 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2866 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2867 return (EINVAL); 2868 } 2869 if (addr->sa_len != sizeof(*sin)) { 2870 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2871 return (EINVAL); 2872 } 2873 sin = (struct sockaddr_in *)addr; 2874 lport = sin->sin_port; 2875 /* 2876 * For LOOPBACK the prison_local_ip4() call 2877 * will transmute the ip address to the 2878 * proper value. 2879 */ 2880 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2881 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2882 return (error); 2883 } 2884 if (sin->sin_addr.s_addr != INADDR_ANY) { 2885 bindall = 0; 2886 } 2887 break; 2888 } 2889 #endif 2890 #ifdef INET6 2891 case AF_INET6: 2892 { 2893 /* 2894 * Only for pure IPv6 Address. (No IPv4 2895 * Mapped!) 2896 */ 2897 struct sockaddr_in6 *sin6; 2898 2899 sin6 = (struct sockaddr_in6 *)addr; 2900 2901 if (addr->sa_len != sizeof(*sin6)) { 2902 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2903 return (EINVAL); 2904 } 2905 lport = sin6->sin6_port; 2906 2907 /* 2908 * For LOOPBACK the prison_local_ip6() call 2909 * will transmute the ipv6 address to the 2910 * proper value. 2911 */ 2912 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2913 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2914 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2915 return (error); 2916 } 2917 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2918 bindall = 0; 2919 /* KAME hack: embed scopeid */ 2920 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2921 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2922 return (EINVAL); 2923 } 2924 } 2925 /* this must be cleared for ifa_ifwithaddr() */ 2926 sin6->sin6_scope_id = 0; 2927 break; 2928 } 2929 #endif 2930 default: 2931 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2932 return (EAFNOSUPPORT); 2933 } 2934 } 2935 SCTP_INP_INFO_WLOCK(); 2936 SCTP_INP_WLOCK(inp); 2937 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2938 vrf_id = inp->def_vrf_id; 2939 2940 /* increase our count due to the unlock we do */ 2941 SCTP_INP_INCR_REF(inp); 2942 if (lport) { 2943 /* 2944 * Did the caller specify a port? if so we must see if a ep 2945 * already has this one bound. 2946 */ 2947 /* got to be root to get at low ports */ 2948 if (ntohs(lport) < IPPORT_RESERVED) { 2949 if (p && (error = 2950 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2951 )) { 2952 SCTP_INP_DECR_REF(inp); 2953 SCTP_INP_WUNLOCK(inp); 2954 SCTP_INP_INFO_WUNLOCK(); 2955 return (error); 2956 } 2957 } 2958 if (p == NULL) { 2959 SCTP_INP_DECR_REF(inp); 2960 SCTP_INP_WUNLOCK(inp); 2961 SCTP_INP_INFO_WUNLOCK(); 2962 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2963 return (error); 2964 } 2965 SCTP_INP_WUNLOCK(inp); 2966 if (bindall) { 2967 vrf_id = inp->def_vrf_id; 2968 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2969 if (inp_tmp != NULL) { 2970 /* 2971 * lock guy returned and lower count note 2972 * that we are not bound so inp_tmp should 2973 * NEVER be inp. And it is this inp 2974 * (inp_tmp) that gets the reference bump, 2975 * so we must lower it. 2976 */ 2977 SCTP_INP_DECR_REF(inp_tmp); 2978 /* unlock info */ 2979 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2980 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2981 /* 2982 * Ok, must be one-2-one and 2983 * allowing port re-use 2984 */ 2985 port_reuse_active = 1; 2986 goto continue_anyway; 2987 } 2988 SCTP_INP_DECR_REF(inp); 2989 SCTP_INP_INFO_WUNLOCK(); 2990 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2991 return (EADDRINUSE); 2992 } 2993 } else { 2994 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2995 if (inp_tmp != NULL) { 2996 /* 2997 * lock guy returned and lower count note 2998 * that we are not bound so inp_tmp should 2999 * NEVER be inp. And it is this inp 3000 * (inp_tmp) that gets the reference bump, 3001 * so we must lower it. 3002 */ 3003 SCTP_INP_DECR_REF(inp_tmp); 3004 /* unlock info */ 3005 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3006 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3007 /* 3008 * Ok, must be one-2-one and 3009 * allowing port re-use 3010 */ 3011 port_reuse_active = 1; 3012 goto continue_anyway; 3013 } 3014 SCTP_INP_DECR_REF(inp); 3015 SCTP_INP_INFO_WUNLOCK(); 3016 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3017 return (EADDRINUSE); 3018 } 3019 } 3020 continue_anyway: 3021 SCTP_INP_WLOCK(inp); 3022 if (bindall) { 3023 /* verify that no lport is not used by a singleton */ 3024 if ((port_reuse_active == 0) && 3025 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 3026 ) { 3027 /* Sorry someone already has this one bound */ 3028 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3029 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3030 port_reuse_active = 1; 3031 } else { 3032 SCTP_INP_DECR_REF(inp); 3033 SCTP_INP_WUNLOCK(inp); 3034 SCTP_INP_INFO_WUNLOCK(); 3035 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3036 return (EADDRINUSE); 3037 } 3038 } 3039 } 3040 } else { 3041 uint16_t first, last, candidate; 3042 uint16_t count; 3043 int done; 3044 3045 if (ip_inp->inp_flags & INP_HIGHPORT) { 3046 first = MODULE_GLOBAL(ipport_hifirstauto); 3047 last = MODULE_GLOBAL(ipport_hilastauto); 3048 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3049 if (p && (error = 3050 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3051 )) { 3052 SCTP_INP_DECR_REF(inp); 3053 SCTP_INP_WUNLOCK(inp); 3054 SCTP_INP_INFO_WUNLOCK(); 3055 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3056 return (error); 3057 } 3058 first = MODULE_GLOBAL(ipport_lowfirstauto); 3059 last = MODULE_GLOBAL(ipport_lowlastauto); 3060 } else { 3061 first = MODULE_GLOBAL(ipport_firstauto); 3062 last = MODULE_GLOBAL(ipport_lastauto); 3063 } 3064 if (first > last) { 3065 uint16_t temp; 3066 3067 temp = first; 3068 first = last; 3069 last = temp; 3070 } 3071 count = last - first + 1; /* number of candidates */ 3072 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3073 3074 done = 0; 3075 while (!done) { 3076 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3077 done = 1; 3078 } 3079 if (!done) { 3080 if (--count == 0) { 3081 SCTP_INP_DECR_REF(inp); 3082 SCTP_INP_WUNLOCK(inp); 3083 SCTP_INP_INFO_WUNLOCK(); 3084 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3085 return (EADDRINUSE); 3086 } 3087 if (candidate == last) 3088 candidate = first; 3089 else 3090 candidate = candidate + 1; 3091 } 3092 } 3093 lport = htons(candidate); 3094 } 3095 SCTP_INP_DECR_REF(inp); 3096 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3097 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3098 /* 3099 * this really should not happen. The guy did a non-blocking 3100 * bind and then did a close at the same time. 3101 */ 3102 SCTP_INP_WUNLOCK(inp); 3103 SCTP_INP_INFO_WUNLOCK(); 3104 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3105 return (EINVAL); 3106 } 3107 /* ok we look clear to give out this port, so lets setup the binding */ 3108 if (bindall) { 3109 /* binding to all addresses, so just set in the proper flags */ 3110 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3111 /* set the automatic addr changes from kernel flag */ 3112 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3113 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3114 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3115 } else { 3116 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3117 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3118 } 3119 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3120 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3121 } else { 3122 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3123 } 3124 /* 3125 * set the automatic mobility_base from kernel flag (by 3126 * micchie) 3127 */ 3128 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3129 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3130 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3131 } else { 3132 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3133 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3134 } 3135 /* 3136 * set the automatic mobility_fasthandoff from kernel flag 3137 * (by micchie) 3138 */ 3139 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3140 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3141 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3142 } else { 3143 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3144 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3145 } 3146 } else { 3147 /* 3148 * bind specific, make sure flags is off and add a new 3149 * address structure to the sctp_addr_list inside the ep 3150 * structure. 3151 * 3152 * We will need to allocate one and insert it at the head. The 3153 * socketopt call can just insert new addresses in there as 3154 * well. It will also have to do the embed scope kame hack 3155 * too (before adding). 3156 */ 3157 struct sctp_ifa *ifa; 3158 struct sockaddr_storage store_sa; 3159 3160 memset(&store_sa, 0, sizeof(store_sa)); 3161 switch (addr->sa_family) { 3162 case AF_INET: 3163 { 3164 struct sockaddr_in *sin; 3165 3166 sin = (struct sockaddr_in *)&store_sa; 3167 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3168 sin->sin_port = 0; 3169 break; 3170 } 3171 case AF_INET6: 3172 { 3173 struct sockaddr_in6 *sin6; 3174 3175 sin6 = (struct sockaddr_in6 *)&store_sa; 3176 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3177 sin6->sin6_port = 0; 3178 break; 3179 } 3180 default: 3181 break; 3182 } 3183 /* 3184 * first find the interface with the bound address need to 3185 * zero out the port to find the address! yuck! can't do 3186 * this earlier since need port for sctp_pcb_findep() 3187 */ 3188 if (sctp_ifap != NULL) 3189 ifa = sctp_ifap; 3190 else { 3191 /* 3192 * Note for BSD we hit here always other O/S's will 3193 * pass things in via the sctp_ifap argument 3194 * (Panda). 3195 */ 3196 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3197 vrf_id, SCTP_ADDR_NOT_LOCKED); 3198 } 3199 if (ifa == NULL) { 3200 /* Can't find an interface with that address */ 3201 SCTP_INP_WUNLOCK(inp); 3202 SCTP_INP_INFO_WUNLOCK(); 3203 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3204 return (EADDRNOTAVAIL); 3205 } 3206 #ifdef INET6 3207 if (addr->sa_family == AF_INET6) { 3208 /* GAK, more FIXME IFA lock? */ 3209 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3210 /* Can't bind a non-existent addr. */ 3211 SCTP_INP_WUNLOCK(inp); 3212 SCTP_INP_INFO_WUNLOCK(); 3213 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3214 return (EINVAL); 3215 } 3216 } 3217 #endif 3218 /* we're not bound all */ 3219 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3220 /* allow bindx() to send ASCONF's for binding changes */ 3221 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3222 /* clear automatic addr changes from kernel flag */ 3223 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3224 3225 /* add this address to the endpoint list */ 3226 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3227 if (error != 0) { 3228 SCTP_INP_WUNLOCK(inp); 3229 SCTP_INP_INFO_WUNLOCK(); 3230 return (error); 3231 } 3232 inp->laddr_count++; 3233 } 3234 /* find the bucket */ 3235 if (port_reuse_active) { 3236 /* Put it into tcp 1-2-1 hash */ 3237 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3238 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3239 } else { 3240 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3241 } 3242 /* put it in the bucket */ 3243 LIST_INSERT_HEAD(head, inp, sctp_hash); 3244 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3245 head, ntohs(lport), port_reuse_active); 3246 /* set in the port */ 3247 inp->sctp_lport = lport; 3248 3249 /* turn off just the unbound flag */ 3250 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3251 SCTP_INP_WUNLOCK(inp); 3252 SCTP_INP_INFO_WUNLOCK(); 3253 return (0); 3254 } 3255 3256 3257 static void 3258 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3259 { 3260 struct sctp_iterator *it, *nit; 3261 3262 /* 3263 * We enter with the only the ITERATOR_LOCK in place and a write 3264 * lock on the inp_info stuff. 3265 */ 3266 it = sctp_it_ctl.cur_it; 3267 if (it && (it->vn != curvnet)) { 3268 /* Its not looking at our VNET */ 3269 return; 3270 } 3271 if (it && (it->inp == inp)) { 3272 /* 3273 * This is tricky and we hold the iterator lock, but when it 3274 * returns and gets the lock (when we release it) the 3275 * iterator will try to operate on inp. We need to stop that 3276 * from happening. But of course the iterator has a 3277 * reference on the stcb and inp. We can mark it and it will 3278 * stop. 3279 * 3280 * If its a single iterator situation, we set the end iterator 3281 * flag. Otherwise we set the iterator to go to the next 3282 * inp. 3283 * 3284 */ 3285 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3286 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3287 } else { 3288 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3289 } 3290 } 3291 /* 3292 * Now go through and remove any single reference to our inp that 3293 * may be still pending on the list 3294 */ 3295 SCTP_IPI_ITERATOR_WQ_LOCK(); 3296 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3297 if (it->vn != curvnet) { 3298 continue; 3299 } 3300 if (it->inp == inp) { 3301 /* This one points to me is it inp specific? */ 3302 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3303 /* Remove and free this one */ 3304 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3305 it, sctp_nxt_itr); 3306 if (it->function_atend != NULL) { 3307 (*it->function_atend) (it->pointer, it->val); 3308 } 3309 SCTP_FREE(it, SCTP_M_ITER); 3310 } else { 3311 it->inp = LIST_NEXT(it->inp, sctp_list); 3312 if (it->inp) { 3313 SCTP_INP_INCR_REF(it->inp); 3314 } 3315 } 3316 /* 3317 * When its put in the refcnt is incremented so decr 3318 * it 3319 */ 3320 SCTP_INP_DECR_REF(inp); 3321 } 3322 } 3323 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3324 } 3325 3326 /* release sctp_inpcb unbind the port */ 3327 void 3328 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3329 { 3330 /* 3331 * Here we free a endpoint. We must find it (if it is in the Hash 3332 * table) and remove it from there. Then we must also find it in the 3333 * overall list and remove it from there. After all removals are 3334 * complete then any timer has to be stopped. Then start the actual 3335 * freeing. a) Any local lists. b) Any associations. c) The hash of 3336 * all associations. d) finally the ep itself. 3337 */ 3338 struct sctp_pcb *m; 3339 struct sctp_tcb *asoc, *nasoc; 3340 struct sctp_laddr *laddr, *nladdr; 3341 struct inpcb *ip_pcb; 3342 struct socket *so; 3343 int being_refed = 0; 3344 struct sctp_queued_to_read *sq, *nsq; 3345 int cnt; 3346 sctp_sharedkey_t *shared_key, *nshared_key; 3347 3348 3349 #ifdef SCTP_LOG_CLOSING 3350 sctp_log_closing(inp, NULL, 0); 3351 #endif 3352 SCTP_ITERATOR_LOCK(); 3353 /* mark any iterators on the list or being processed */ 3354 sctp_iterator_inp_being_freed(inp); 3355 SCTP_ITERATOR_UNLOCK(); 3356 so = inp->sctp_socket; 3357 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3358 /* been here before.. eeks.. get out of here */ 3359 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3360 #ifdef SCTP_LOG_CLOSING 3361 sctp_log_closing(inp, NULL, 1); 3362 #endif 3363 return; 3364 } 3365 SCTP_ASOC_CREATE_LOCK(inp); 3366 SCTP_INP_INFO_WLOCK(); 3367 3368 SCTP_INP_WLOCK(inp); 3369 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3370 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3371 /* socket is gone, so no more wakeups allowed */ 3372 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3373 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3374 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3375 3376 } 3377 /* First time through we have the socket lock, after that no more. */ 3378 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3379 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3380 3381 if (inp->control) { 3382 sctp_m_freem(inp->control); 3383 inp->control = NULL; 3384 } 3385 if (inp->pkt) { 3386 sctp_m_freem(inp->pkt); 3387 inp->pkt = NULL; 3388 } 3389 m = &inp->sctp_ep; 3390 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3391 * here but I will be nice :> (i.e. 3392 * ip_pcb = ep;) */ 3393 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3394 int cnt_in_sd; 3395 3396 cnt_in_sd = 0; 3397 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3398 SCTP_TCB_LOCK(asoc); 3399 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3400 /* Skip guys being freed */ 3401 cnt_in_sd++; 3402 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3403 /* 3404 * Special case - we did not start a 3405 * kill timer on the asoc due to it 3406 * was not closed. So go ahead and 3407 * start it now. 3408 */ 3409 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3410 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3411 } 3412 SCTP_TCB_UNLOCK(asoc); 3413 continue; 3414 } 3415 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3416 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3417 (asoc->asoc.total_output_queue_size == 0)) { 3418 /* 3419 * If we have data in queue, we don't want 3420 * to just free since the app may have done, 3421 * send()/close or connect/send/close. And 3422 * it wants the data to get across first. 3423 */ 3424 /* Just abandon things in the front states */ 3425 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3426 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3427 cnt_in_sd++; 3428 } 3429 continue; 3430 } 3431 /* Disconnect the socket please */ 3432 asoc->sctp_socket = NULL; 3433 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3434 if ((asoc->asoc.size_on_reasm_queue > 0) || 3435 (asoc->asoc.control_pdapi) || 3436 (asoc->asoc.size_on_all_streams > 0) || 3437 (so && (so->so_rcv.sb_cc > 0)) 3438 ) { 3439 /* Left with Data unread */ 3440 struct mbuf *op_err; 3441 3442 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3443 0, M_DONTWAIT, 1, MT_DATA); 3444 if (op_err) { 3445 /* Fill in the user initiated abort */ 3446 struct sctp_paramhdr *ph; 3447 uint32_t *ippp; 3448 3449 SCTP_BUF_LEN(op_err) = 3450 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3451 ph = mtod(op_err, 3452 struct sctp_paramhdr *); 3453 ph->param_type = htons( 3454 SCTP_CAUSE_USER_INITIATED_ABT); 3455 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3456 ippp = (uint32_t *) (ph + 1); 3457 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3458 } 3459 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3460 #if defined(SCTP_PANIC_ON_ABORT) 3461 panic("inpcb_free does an abort"); 3462 #endif 3463 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3464 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3465 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3466 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3467 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3468 } 3469 if (sctp_free_assoc(inp, asoc, 3470 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3471 cnt_in_sd++; 3472 } 3473 continue; 3474 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3475 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3476 (asoc->asoc.stream_queue_cnt == 0) 3477 ) { 3478 if (asoc->asoc.locked_on_sending) { 3479 goto abort_anyway; 3480 } 3481 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3482 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3483 struct sctp_nets *netp; 3484 3485 if (asoc->asoc.alternate) { 3486 netp = asoc->asoc.alternate; 3487 } else { 3488 netp = asoc->asoc.primary_destination; 3489 } 3490 /* 3491 * there is nothing queued to send, 3492 * so I send shutdown 3493 */ 3494 sctp_send_shutdown(asoc, netp); 3495 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3496 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3497 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3498 } 3499 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3500 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3501 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3502 netp); 3503 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3504 asoc->asoc.primary_destination); 3505 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3506 } 3507 } else { 3508 /* mark into shutdown pending */ 3509 struct sctp_stream_queue_pending *sp; 3510 3511 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3512 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3513 asoc->asoc.primary_destination); 3514 if (asoc->asoc.locked_on_sending) { 3515 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3516 sctp_streamhead); 3517 if (sp == NULL) { 3518 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3519 asoc->asoc.locked_on_sending, 3520 asoc->asoc.locked_on_sending->stream_no); 3521 } else { 3522 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3523 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3524 } 3525 } 3526 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3527 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3528 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3529 struct mbuf *op_err; 3530 3531 abort_anyway: 3532 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3533 0, M_DONTWAIT, 1, MT_DATA); 3534 if (op_err) { 3535 /* 3536 * Fill in the user 3537 * initiated abort 3538 */ 3539 struct sctp_paramhdr *ph; 3540 uint32_t *ippp; 3541 3542 SCTP_BUF_LEN(op_err) = 3543 (sizeof(struct sctp_paramhdr) + 3544 sizeof(uint32_t)); 3545 ph = mtod(op_err, 3546 struct sctp_paramhdr *); 3547 ph->param_type = htons( 3548 SCTP_CAUSE_USER_INITIATED_ABT); 3549 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3550 ippp = (uint32_t *) (ph + 1); 3551 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3552 } 3553 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3554 #if defined(SCTP_PANIC_ON_ABORT) 3555 panic("inpcb_free does an abort"); 3556 #endif 3557 3558 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3559 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3560 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3561 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3562 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3563 } 3564 if (sctp_free_assoc(inp, asoc, 3565 SCTP_PCBFREE_NOFORCE, 3566 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3567 cnt_in_sd++; 3568 } 3569 continue; 3570 } else { 3571 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3572 } 3573 } 3574 cnt_in_sd++; 3575 SCTP_TCB_UNLOCK(asoc); 3576 } 3577 /* now is there some left in our SHUTDOWN state? */ 3578 if (cnt_in_sd) { 3579 #ifdef SCTP_LOG_CLOSING 3580 sctp_log_closing(inp, NULL, 2); 3581 #endif 3582 inp->sctp_socket = NULL; 3583 SCTP_INP_WUNLOCK(inp); 3584 SCTP_ASOC_CREATE_UNLOCK(inp); 3585 SCTP_INP_INFO_WUNLOCK(); 3586 return; 3587 } 3588 } 3589 inp->sctp_socket = NULL; 3590 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3591 SCTP_PCB_FLAGS_UNBOUND) { 3592 /* 3593 * ok, this guy has been bound. It's port is somewhere in 3594 * the SCTP_BASE_INFO(hash table). Remove it! 3595 */ 3596 LIST_REMOVE(inp, sctp_hash); 3597 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3598 } 3599 /* 3600 * If there is a timer running to kill us, forget it, since it may 3601 * have a contest on the INP lock.. which would cause us to die ... 3602 */ 3603 cnt = 0; 3604 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3605 SCTP_TCB_LOCK(asoc); 3606 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3607 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3608 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3609 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3610 } 3611 cnt++; 3612 SCTP_TCB_UNLOCK(asoc); 3613 continue; 3614 } 3615 /* Free associations that are NOT killing us */ 3616 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3617 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3618 struct mbuf *op_err; 3619 uint32_t *ippp; 3620 3621 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3622 0, M_DONTWAIT, 1, MT_DATA); 3623 if (op_err) { 3624 /* Fill in the user initiated abort */ 3625 struct sctp_paramhdr *ph; 3626 3627 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3628 sizeof(uint32_t)); 3629 ph = mtod(op_err, struct sctp_paramhdr *); 3630 ph->param_type = htons( 3631 SCTP_CAUSE_USER_INITIATED_ABT); 3632 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3633 ippp = (uint32_t *) (ph + 1); 3634 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3635 3636 } 3637 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3638 #if defined(SCTP_PANIC_ON_ABORT) 3639 panic("inpcb_free does an abort"); 3640 #endif 3641 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3642 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3643 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3644 cnt++; 3645 SCTP_TCB_UNLOCK(asoc); 3646 continue; 3647 } 3648 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3649 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3650 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3651 } 3652 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3653 cnt++; 3654 } 3655 } 3656 if (cnt) { 3657 /* Ok we have someone out there that will kill us */ 3658 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3659 #ifdef SCTP_LOG_CLOSING 3660 sctp_log_closing(inp, NULL, 3); 3661 #endif 3662 SCTP_INP_WUNLOCK(inp); 3663 SCTP_ASOC_CREATE_UNLOCK(inp); 3664 SCTP_INP_INFO_WUNLOCK(); 3665 return; 3666 } 3667 if (SCTP_INP_LOCK_CONTENDED(inp)) 3668 being_refed++; 3669 if (SCTP_INP_READ_CONTENDED(inp)) 3670 being_refed++; 3671 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3672 being_refed++; 3673 3674 if ((inp->refcount) || 3675 (being_refed) || 3676 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3677 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3678 #ifdef SCTP_LOG_CLOSING 3679 sctp_log_closing(inp, NULL, 4); 3680 #endif 3681 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3682 SCTP_INP_WUNLOCK(inp); 3683 SCTP_ASOC_CREATE_UNLOCK(inp); 3684 SCTP_INP_INFO_WUNLOCK(); 3685 return; 3686 } 3687 inp->sctp_ep.signature_change.type = 0; 3688 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3689 /* 3690 * Remove it from the list .. last thing we need a lock for. 3691 */ 3692 LIST_REMOVE(inp, sctp_list); 3693 SCTP_INP_WUNLOCK(inp); 3694 SCTP_ASOC_CREATE_UNLOCK(inp); 3695 SCTP_INP_INFO_WUNLOCK(); 3696 /* 3697 * Now we release all locks. Since this INP cannot be found anymore 3698 * except possibly by the kill timer that might be running. We call 3699 * the drain function here. It should hit the case were it sees the 3700 * ACTIVE flag cleared and exit out freeing us to proceed and 3701 * destroy everything. 3702 */ 3703 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3704 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3705 } else { 3706 /* Probably un-needed */ 3707 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3708 } 3709 3710 #ifdef SCTP_LOG_CLOSING 3711 sctp_log_closing(inp, NULL, 5); 3712 #endif 3713 3714 3715 if ((inp->sctp_asocidhash) != NULL) { 3716 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3717 inp->sctp_asocidhash = NULL; 3718 } 3719 /* sa_ignore FREED_MEMORY */ 3720 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3721 /* Its only abandoned if it had data left */ 3722 if (sq->length) 3723 SCTP_STAT_INCR(sctps_left_abandon); 3724 3725 TAILQ_REMOVE(&inp->read_queue, sq, next); 3726 sctp_free_remote_addr(sq->whoFrom); 3727 if (so) 3728 so->so_rcv.sb_cc -= sq->length; 3729 if (sq->data) { 3730 sctp_m_freem(sq->data); 3731 sq->data = NULL; 3732 } 3733 /* 3734 * no need to free the net count, since at this point all 3735 * assoc's are gone. 3736 */ 3737 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3738 SCTP_DECR_READQ_COUNT(); 3739 } 3740 /* Now the sctp_pcb things */ 3741 /* 3742 * free each asoc if it is not already closed/free. we can't use the 3743 * macro here since le_next will get freed as part of the 3744 * sctp_free_assoc() call. 3745 */ 3746 cnt = 0; 3747 if (so) { 3748 #ifdef IPSEC 3749 ipsec_delete_pcbpolicy(ip_pcb); 3750 #endif /* IPSEC */ 3751 3752 /* Unlocks not needed since the socket is gone now */ 3753 } 3754 if (ip_pcb->inp_options) { 3755 (void)sctp_m_free(ip_pcb->inp_options); 3756 ip_pcb->inp_options = 0; 3757 } 3758 #ifdef INET6 3759 if (ip_pcb->inp_vflag & INP_IPV6) { 3760 struct in6pcb *in6p; 3761 3762 in6p = (struct in6pcb *)inp; 3763 ip6_freepcbopts(in6p->in6p_outputopts); 3764 } 3765 #endif /* INET6 */ 3766 ip_pcb->inp_vflag = 0; 3767 /* free up authentication fields */ 3768 if (inp->sctp_ep.local_auth_chunks != NULL) 3769 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3770 if (inp->sctp_ep.local_hmacs != NULL) 3771 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3772 3773 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3774 LIST_REMOVE(shared_key, next); 3775 sctp_free_sharedkey(shared_key); 3776 /* sa_ignore FREED_MEMORY */ 3777 } 3778 3779 /* 3780 * if we have an address list the following will free the list of 3781 * ifaddr's that are set into this ep. Again macro limitations here, 3782 * since the LIST_FOREACH could be a bad idea. 3783 */ 3784 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3785 sctp_remove_laddr(laddr); 3786 } 3787 3788 #ifdef SCTP_TRACK_FREED_ASOCS 3789 /* TEMP CODE */ 3790 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3791 LIST_REMOVE(asoc, sctp_tcblist); 3792 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3793 SCTP_DECR_ASOC_COUNT(); 3794 } 3795 /* *** END TEMP CODE *** */ 3796 #endif 3797 /* Now lets see about freeing the EP hash table. */ 3798 if (inp->sctp_tcbhash != NULL) { 3799 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3800 inp->sctp_tcbhash = NULL; 3801 } 3802 /* Now we must put the ep memory back into the zone pool */ 3803 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3804 SCTP_INP_LOCK_DESTROY(inp); 3805 SCTP_INP_READ_DESTROY(inp); 3806 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3807 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3808 SCTP_DECR_EP_COUNT(); 3809 } 3810 3811 3812 struct sctp_nets * 3813 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3814 { 3815 struct sctp_nets *net; 3816 3817 /* locate the address */ 3818 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3819 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3820 return (net); 3821 } 3822 return (NULL); 3823 } 3824 3825 3826 int 3827 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3828 { 3829 struct sctp_ifa *sctp_ifa; 3830 3831 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3832 if (sctp_ifa) { 3833 return (1); 3834 } else { 3835 return (0); 3836 } 3837 } 3838 3839 /* 3840 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3841 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3842 * stats of stuff. 3843 */ 3844 int 3845 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3846 struct sctp_nets **netp, int set_scope, int from) 3847 { 3848 /* 3849 * The following is redundant to the same lines in the 3850 * sctp_aloc_assoc() but is needed since others call the add address 3851 * function 3852 */ 3853 struct sctp_nets *net, *netfirst; 3854 int addr_inscope; 3855 3856 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3857 from); 3858 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3859 3860 netfirst = sctp_findnet(stcb, newaddr); 3861 if (netfirst) { 3862 /* 3863 * Lie and return ok, we don't want to make the association 3864 * go away for this behavior. It will happen in the TCP 3865 * model in a connected socket. It does not reach the hash 3866 * table until after the association is built so it can't be 3867 * found. Mark as reachable, since the initial creation will 3868 * have been cleared and the NOT_IN_ASSOC flag will have 3869 * been added... and we don't want to end up removing it 3870 * back out. 3871 */ 3872 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3873 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3874 SCTP_ADDR_UNCONFIRMED); 3875 } else { 3876 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3877 } 3878 3879 return (0); 3880 } 3881 addr_inscope = 1; 3882 switch (newaddr->sa_family) { 3883 #ifdef INET 3884 case AF_INET: 3885 { 3886 struct sockaddr_in *sin; 3887 3888 sin = (struct sockaddr_in *)newaddr; 3889 if (sin->sin_addr.s_addr == 0) { 3890 /* Invalid address */ 3891 return (-1); 3892 } 3893 /* zero out the bzero area */ 3894 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3895 3896 /* assure len is set */ 3897 sin->sin_len = sizeof(struct sockaddr_in); 3898 if (set_scope) { 3899 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3900 stcb->ipv4_local_scope = 1; 3901 #else 3902 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3903 stcb->asoc.ipv4_local_scope = 1; 3904 } 3905 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3906 } else { 3907 /* Validate the address is in scope */ 3908 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3909 (stcb->asoc.ipv4_local_scope == 0)) { 3910 addr_inscope = 0; 3911 } 3912 } 3913 break; 3914 } 3915 #endif 3916 #ifdef INET6 3917 case AF_INET6: 3918 { 3919 struct sockaddr_in6 *sin6; 3920 3921 sin6 = (struct sockaddr_in6 *)newaddr; 3922 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3923 /* Invalid address */ 3924 return (-1); 3925 } 3926 /* assure len is set */ 3927 sin6->sin6_len = sizeof(struct sockaddr_in6); 3928 if (set_scope) { 3929 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3930 stcb->asoc.loopback_scope = 1; 3931 stcb->asoc.local_scope = 0; 3932 stcb->asoc.ipv4_local_scope = 1; 3933 stcb->asoc.site_scope = 1; 3934 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3935 /* 3936 * If the new destination is a 3937 * LINK_LOCAL we must have common 3938 * site scope. Don't set the local 3939 * scope since we may not share all 3940 * links, only loopback can do this. 3941 * Links on the local network would 3942 * also be on our private network 3943 * for v4 too. 3944 */ 3945 stcb->asoc.ipv4_local_scope = 1; 3946 stcb->asoc.site_scope = 1; 3947 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3948 /* 3949 * If the new destination is 3950 * SITE_LOCAL then we must have site 3951 * scope in common. 3952 */ 3953 stcb->asoc.site_scope = 1; 3954 } 3955 } else { 3956 /* Validate the address is in scope */ 3957 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3958 (stcb->asoc.loopback_scope == 0)) { 3959 addr_inscope = 0; 3960 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3961 (stcb->asoc.local_scope == 0)) { 3962 addr_inscope = 0; 3963 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3964 (stcb->asoc.site_scope == 0)) { 3965 addr_inscope = 0; 3966 } 3967 } 3968 break; 3969 } 3970 #endif 3971 default: 3972 /* not supported family type */ 3973 return (-1); 3974 } 3975 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3976 if (net == NULL) { 3977 return (-1); 3978 } 3979 SCTP_INCR_RADDR_COUNT(); 3980 bzero(net, sizeof(struct sctp_nets)); 3981 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3982 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3983 switch (newaddr->sa_family) { 3984 #ifdef INET 3985 case AF_INET: 3986 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3987 break; 3988 #endif 3989 #ifdef INET6 3990 case AF_INET6: 3991 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3992 break; 3993 #endif 3994 default: 3995 break; 3996 } 3997 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3998 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3999 stcb->asoc.loopback_scope = 1; 4000 stcb->asoc.ipv4_local_scope = 1; 4001 stcb->asoc.local_scope = 0; 4002 stcb->asoc.site_scope = 1; 4003 addr_inscope = 1; 4004 } 4005 net->failure_threshold = stcb->asoc.def_net_failure; 4006 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 4007 if (addr_inscope == 0) { 4008 net->dest_state = (SCTP_ADDR_REACHABLE | 4009 SCTP_ADDR_OUT_OF_SCOPE); 4010 } else { 4011 if (from == SCTP_ADDR_IS_CONFIRMED) 4012 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 4013 net->dest_state = SCTP_ADDR_REACHABLE; 4014 else 4015 net->dest_state = SCTP_ADDR_REACHABLE | 4016 SCTP_ADDR_UNCONFIRMED; 4017 } 4018 /* 4019 * We set this to 0, the timer code knows that this means its an 4020 * initial value 4021 */ 4022 net->rto_needed = 1; 4023 net->RTO = 0; 4024 net->RTO_measured = 0; 4025 stcb->asoc.numnets++; 4026 *(&net->ref_count) = 1; 4027 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 4028 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 4029 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4030 } else { 4031 net->port = 0; 4032 } 4033 net->dscp = stcb->asoc.default_dscp; 4034 #ifdef INET6 4035 net->flowlabel = stcb->asoc.default_flowlabel; 4036 #endif 4037 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 4038 net->dest_state |= SCTP_ADDR_NOHB; 4039 } else { 4040 net->dest_state &= ~SCTP_ADDR_NOHB; 4041 } 4042 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 4043 net->dest_state |= SCTP_ADDR_NO_PMTUD; 4044 } else { 4045 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 4046 } 4047 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 4048 /* Init the timer structure */ 4049 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 4050 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 4051 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 4052 4053 /* Now generate a route for this guy */ 4054 #ifdef INET6 4055 /* KAME hack: embed scopeid */ 4056 if (newaddr->sa_family == AF_INET6) { 4057 struct sockaddr_in6 *sin6; 4058 4059 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4060 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 4061 sin6->sin6_scope_id = 0; 4062 } 4063 #endif 4064 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 4065 4066 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 4067 /* Get source address */ 4068 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 4069 stcb, 4070 (sctp_route_t *) & net->ro, 4071 net, 4072 0, 4073 stcb->asoc.vrf_id); 4074 /* Now get the interface MTU */ 4075 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 4076 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 4077 } else { 4078 net->mtu = 0; 4079 } 4080 if (net->mtu == 0) { 4081 /* Huh ?? */ 4082 net->mtu = SCTP_DEFAULT_MTU; 4083 } else { 4084 uint32_t rmtu; 4085 4086 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 4087 if (rmtu == 0) { 4088 /* 4089 * Start things off to match mtu of 4090 * interface please. 4091 */ 4092 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 4093 net->ro.ro_rt, net->mtu); 4094 } else { 4095 /* 4096 * we take the route mtu over the interface, 4097 * since the route may be leading out the 4098 * loopback, or a different interface. 4099 */ 4100 net->mtu = rmtu; 4101 } 4102 } 4103 if (from == SCTP_ALLOC_ASOC) { 4104 stcb->asoc.smallest_mtu = net->mtu; 4105 } 4106 } else { 4107 net->mtu = stcb->asoc.smallest_mtu; 4108 } 4109 #ifdef INET6 4110 if (newaddr->sa_family == AF_INET6) { 4111 struct sockaddr_in6 *sin6; 4112 4113 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4114 (void)sa6_recoverscope(sin6); 4115 } 4116 #endif 4117 if (net->port) { 4118 net->mtu -= sizeof(struct udphdr); 4119 } 4120 if (stcb->asoc.smallest_mtu > net->mtu) { 4121 stcb->asoc.smallest_mtu = net->mtu; 4122 } 4123 /* JRS - Use the congestion control given in the CC module */ 4124 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4125 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4126 4127 /* 4128 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4129 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4130 */ 4131 net->find_pseudo_cumack = 1; 4132 net->find_rtx_pseudo_cumack = 1; 4133 net->src_addr_selected = 0; 4134 /* Choose an initial flowid. */ 4135 net->flowid = stcb->asoc.my_vtag ^ 4136 ntohs(stcb->rport) ^ 4137 ntohs(stcb->sctp_ep->sctp_lport); 4138 #ifdef INVARIANTS 4139 net->flowidset = 1; 4140 #endif 4141 if (netp) { 4142 *netp = net; 4143 } 4144 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4145 if (net->ro.ro_rt == NULL) { 4146 /* Since we have no route put it at the back */ 4147 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4148 } else if (netfirst == NULL) { 4149 /* We are the first one in the pool. */ 4150 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4151 } else if (netfirst->ro.ro_rt == NULL) { 4152 /* 4153 * First one has NO route. Place this one ahead of the first 4154 * one. 4155 */ 4156 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4157 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4158 /* 4159 * This one has a different interface than the one at the 4160 * top of the list. Place it ahead. 4161 */ 4162 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4163 } else { 4164 /* 4165 * Ok we have the same interface as the first one. Move 4166 * forward until we find either a) one with a NULL route... 4167 * insert ahead of that b) one with a different ifp.. insert 4168 * after that. c) end of the list.. insert at the tail. 4169 */ 4170 struct sctp_nets *netlook; 4171 4172 do { 4173 netlook = TAILQ_NEXT(netfirst, sctp_next); 4174 if (netlook == NULL) { 4175 /* End of the list */ 4176 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4177 break; 4178 } else if (netlook->ro.ro_rt == NULL) { 4179 /* next one has NO route */ 4180 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4181 break; 4182 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4183 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4184 net, sctp_next); 4185 break; 4186 } 4187 /* Shift forward */ 4188 netfirst = netlook; 4189 } while (netlook != NULL); 4190 } 4191 4192 /* got to have a primary set */ 4193 if (stcb->asoc.primary_destination == 0) { 4194 stcb->asoc.primary_destination = net; 4195 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4196 (net->ro.ro_rt) && 4197 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4198 /* No route to current primary adopt new primary */ 4199 stcb->asoc.primary_destination = net; 4200 } 4201 /* Validate primary is first */ 4202 net = TAILQ_FIRST(&stcb->asoc.nets); 4203 if ((net != stcb->asoc.primary_destination) && 4204 (stcb->asoc.primary_destination)) { 4205 /* 4206 * first one on the list is NOT the primary sctp_cmpaddr() 4207 * is much more efficient if the primary is the first on the 4208 * list, make it so. 4209 */ 4210 TAILQ_REMOVE(&stcb->asoc.nets, 4211 stcb->asoc.primary_destination, sctp_next); 4212 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4213 stcb->asoc.primary_destination, sctp_next); 4214 } 4215 return (0); 4216 } 4217 4218 4219 static uint32_t 4220 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4221 { 4222 uint32_t id; 4223 struct sctpasochead *head; 4224 struct sctp_tcb *lstcb; 4225 4226 SCTP_INP_WLOCK(inp); 4227 try_again: 4228 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4229 /* TSNH */ 4230 SCTP_INP_WUNLOCK(inp); 4231 return (0); 4232 } 4233 /* 4234 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4235 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4236 */ 4237 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4238 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4239 } 4240 id = inp->sctp_associd_counter; 4241 inp->sctp_associd_counter++; 4242 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4243 if (lstcb) { 4244 goto try_again; 4245 } 4246 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4247 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4248 stcb->asoc.in_asocid_hash = 1; 4249 SCTP_INP_WUNLOCK(inp); 4250 return id; 4251 } 4252 4253 /* 4254 * allocate an association and add it to the endpoint. The caller must be 4255 * careful to add all additional addresses once they are know right away or 4256 * else the assoc will be may experience a blackout scenario. 4257 */ 4258 struct sctp_tcb * 4259 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4260 int *error, uint32_t override_tag, uint32_t vrf_id, 4261 struct thread *p 4262 ) 4263 { 4264 /* note the p argument is only valid in unbound sockets */ 4265 4266 struct sctp_tcb *stcb; 4267 struct sctp_association *asoc; 4268 struct sctpasochead *head; 4269 uint16_t rport; 4270 int err; 4271 4272 /* 4273 * Assumption made here: Caller has done a 4274 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4275 * address does not exist already. 4276 */ 4277 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4278 /* Hit max assoc, sorry no more */ 4279 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4280 *error = ENOBUFS; 4281 return (NULL); 4282 } 4283 if (firstaddr == NULL) { 4284 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4285 *error = EINVAL; 4286 return (NULL); 4287 } 4288 SCTP_INP_RLOCK(inp); 4289 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4290 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4291 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4292 /* 4293 * If its in the TCP pool, its NOT allowed to create an 4294 * association. The parent listener needs to call 4295 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4296 * off, or connected one does this.. its an error. 4297 */ 4298 SCTP_INP_RUNLOCK(inp); 4299 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4300 *error = EINVAL; 4301 return (NULL); 4302 } 4303 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4304 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4305 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4306 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4307 SCTP_INP_RUNLOCK(inp); 4308 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4309 *error = EINVAL; 4310 return (NULL); 4311 } 4312 } 4313 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4314 #ifdef SCTP_DEBUG 4315 if (firstaddr) { 4316 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4317 switch (firstaddr->sa_family) { 4318 #ifdef INET 4319 case AF_INET: 4320 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4321 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4322 break; 4323 #endif 4324 #ifdef INET6 4325 case AF_INET6: 4326 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4327 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4328 break; 4329 #endif 4330 default: 4331 break; 4332 } 4333 } else { 4334 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4335 } 4336 #endif /* SCTP_DEBUG */ 4337 switch (firstaddr->sa_family) { 4338 #ifdef INET 4339 case AF_INET: 4340 { 4341 struct sockaddr_in *sin; 4342 4343 sin = (struct sockaddr_in *)firstaddr; 4344 if ((ntohs(sin->sin_port) == 0) || 4345 (sin->sin_addr.s_addr == INADDR_ANY) || 4346 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4347 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4348 /* Invalid address */ 4349 SCTP_INP_RUNLOCK(inp); 4350 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4351 *error = EINVAL; 4352 return (NULL); 4353 } 4354 rport = sin->sin_port; 4355 break; 4356 } 4357 #endif 4358 #ifdef INET6 4359 case AF_INET6: 4360 { 4361 struct sockaddr_in6 *sin6; 4362 4363 sin6 = (struct sockaddr_in6 *)firstaddr; 4364 if ((ntohs(sin6->sin6_port) == 0) || 4365 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4366 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4367 /* Invalid address */ 4368 SCTP_INP_RUNLOCK(inp); 4369 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4370 *error = EINVAL; 4371 return (NULL); 4372 } 4373 rport = sin6->sin6_port; 4374 break; 4375 } 4376 #endif 4377 default: 4378 /* not supported family type */ 4379 SCTP_INP_RUNLOCK(inp); 4380 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4381 *error = EINVAL; 4382 return (NULL); 4383 } 4384 SCTP_INP_RUNLOCK(inp); 4385 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4386 /* 4387 * If you have not performed a bind, then we need to do the 4388 * ephemeral bind for you. 4389 */ 4390 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4391 (struct sockaddr *)NULL, 4392 (struct sctp_ifa *)NULL, 4393 p 4394 ))) { 4395 /* bind error, probably perm */ 4396 *error = err; 4397 return (NULL); 4398 } 4399 } 4400 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4401 if (stcb == NULL) { 4402 /* out of memory? */ 4403 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4404 *error = ENOMEM; 4405 return (NULL); 4406 } 4407 SCTP_INCR_ASOC_COUNT(); 4408 4409 bzero(stcb, sizeof(*stcb)); 4410 asoc = &stcb->asoc; 4411 4412 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4413 SCTP_TCB_LOCK_INIT(stcb); 4414 SCTP_TCB_SEND_LOCK_INIT(stcb); 4415 stcb->rport = rport; 4416 /* setup back pointer's */ 4417 stcb->sctp_ep = inp; 4418 stcb->sctp_socket = inp->sctp_socket; 4419 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4420 /* failed */ 4421 SCTP_TCB_LOCK_DESTROY(stcb); 4422 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4423 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4424 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4425 SCTP_DECR_ASOC_COUNT(); 4426 *error = err; 4427 return (NULL); 4428 } 4429 /* and the port */ 4430 SCTP_INP_INFO_WLOCK(); 4431 SCTP_INP_WLOCK(inp); 4432 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4433 /* inpcb freed while alloc going on */ 4434 SCTP_TCB_LOCK_DESTROY(stcb); 4435 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4436 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4437 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4438 SCTP_INP_WUNLOCK(inp); 4439 SCTP_INP_INFO_WUNLOCK(); 4440 SCTP_DECR_ASOC_COUNT(); 4441 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4442 *error = EINVAL; 4443 return (NULL); 4444 } 4445 SCTP_TCB_LOCK(stcb); 4446 4447 /* now that my_vtag is set, add it to the hash */ 4448 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4449 /* put it in the bucket in the vtag hash of assoc's for the system */ 4450 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4451 SCTP_INP_INFO_WUNLOCK(); 4452 4453 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4454 /* failure.. memory error? */ 4455 if (asoc->strmout) { 4456 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4457 asoc->strmout = NULL; 4458 } 4459 if (asoc->mapping_array) { 4460 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4461 asoc->mapping_array = NULL; 4462 } 4463 if (asoc->nr_mapping_array) { 4464 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4465 asoc->nr_mapping_array = NULL; 4466 } 4467 SCTP_DECR_ASOC_COUNT(); 4468 SCTP_TCB_LOCK_DESTROY(stcb); 4469 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4470 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4471 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4472 SCTP_INP_WUNLOCK(inp); 4473 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4474 *error = ENOBUFS; 4475 return (NULL); 4476 } 4477 /* Init all the timers */ 4478 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4479 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4480 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4481 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4482 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4483 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4484 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4485 4486 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4487 /* now file the port under the hash as well */ 4488 if (inp->sctp_tcbhash != NULL) { 4489 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4490 inp->sctp_hashmark)]; 4491 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4492 } 4493 SCTP_INP_WUNLOCK(inp); 4494 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4495 return (stcb); 4496 } 4497 4498 4499 void 4500 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4501 { 4502 struct sctp_association *asoc; 4503 4504 asoc = &stcb->asoc; 4505 asoc->numnets--; 4506 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4507 if (net == asoc->primary_destination) { 4508 /* Reset primary */ 4509 struct sctp_nets *lnet; 4510 4511 lnet = TAILQ_FIRST(&asoc->nets); 4512 /* 4513 * Mobility adaptation Ideally, if deleted destination is 4514 * the primary, it becomes a fast retransmission trigger by 4515 * the subsequent SET PRIMARY. (by micchie) 4516 */ 4517 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4518 SCTP_MOBILITY_BASE) || 4519 sctp_is_mobility_feature_on(stcb->sctp_ep, 4520 SCTP_MOBILITY_FASTHANDOFF)) { 4521 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4522 if (asoc->deleted_primary != NULL) { 4523 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4524 goto out; 4525 } 4526 asoc->deleted_primary = net; 4527 atomic_add_int(&net->ref_count, 1); 4528 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4529 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4530 sctp_mobility_feature_on(stcb->sctp_ep, 4531 SCTP_MOBILITY_PRIM_DELETED); 4532 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4533 stcb->sctp_ep, stcb, NULL); 4534 } 4535 out: 4536 /* Try to find a confirmed primary */ 4537 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4538 } 4539 if (net == asoc->last_data_chunk_from) { 4540 /* Reset primary */ 4541 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4542 } 4543 if (net == asoc->last_control_chunk_from) { 4544 /* Clear net */ 4545 asoc->last_control_chunk_from = NULL; 4546 } 4547 if (net == stcb->asoc.alternate) { 4548 sctp_free_remote_addr(stcb->asoc.alternate); 4549 stcb->asoc.alternate = NULL; 4550 } 4551 sctp_free_remote_addr(net); 4552 } 4553 4554 /* 4555 * remove a remote endpoint address from an association, it will fail if the 4556 * address does not exist. 4557 */ 4558 int 4559 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4560 { 4561 /* 4562 * Here we need to remove a remote address. This is quite simple, we 4563 * first find it in the list of address for the association 4564 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4565 * on that item. Note we do not allow it to be removed if there are 4566 * no other addresses. 4567 */ 4568 struct sctp_association *asoc; 4569 struct sctp_nets *net, *nnet; 4570 4571 asoc = &stcb->asoc; 4572 4573 /* locate the address */ 4574 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4575 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4576 continue; 4577 } 4578 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4579 remaddr)) { 4580 /* we found the guy */ 4581 if (asoc->numnets < 2) { 4582 /* Must have at LEAST two remote addresses */ 4583 return (-1); 4584 } else { 4585 sctp_remove_net(stcb, net); 4586 return (0); 4587 } 4588 } 4589 } 4590 /* not found. */ 4591 return (-2); 4592 } 4593 4594 void 4595 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4596 { 4597 struct sctpvtaghead *chain; 4598 struct sctp_tagblock *twait_block; 4599 int found = 0; 4600 int i; 4601 4602 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4603 if (!LIST_EMPTY(chain)) { 4604 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4605 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4606 if ((twait_block->vtag_block[i].v_tag == tag) && 4607 (twait_block->vtag_block[i].lport == lport) && 4608 (twait_block->vtag_block[i].rport == rport)) { 4609 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4610 twait_block->vtag_block[i].v_tag = 0; 4611 twait_block->vtag_block[i].lport = 0; 4612 twait_block->vtag_block[i].rport = 0; 4613 found = 1; 4614 break; 4615 } 4616 } 4617 if (found) 4618 break; 4619 } 4620 } 4621 } 4622 4623 int 4624 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4625 { 4626 struct sctpvtaghead *chain; 4627 struct sctp_tagblock *twait_block; 4628 int found = 0; 4629 int i; 4630 4631 SCTP_INP_INFO_WLOCK(); 4632 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4633 if (!LIST_EMPTY(chain)) { 4634 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4635 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4636 if ((twait_block->vtag_block[i].v_tag == tag) && 4637 (twait_block->vtag_block[i].lport == lport) && 4638 (twait_block->vtag_block[i].rport == rport)) { 4639 found = 1; 4640 break; 4641 } 4642 } 4643 if (found) 4644 break; 4645 } 4646 } 4647 SCTP_INP_INFO_WUNLOCK(); 4648 return (found); 4649 } 4650 4651 4652 void 4653 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4654 { 4655 struct sctpvtaghead *chain; 4656 struct sctp_tagblock *twait_block; 4657 struct timeval now; 4658 int set, i; 4659 4660 if (time == 0) { 4661 /* Its disabled */ 4662 return; 4663 } 4664 (void)SCTP_GETTIME_TIMEVAL(&now); 4665 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4666 set = 0; 4667 if (!LIST_EMPTY(chain)) { 4668 /* Block(s) present, lets find space, and expire on the fly */ 4669 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4670 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4671 if ((twait_block->vtag_block[i].v_tag == 0) && 4672 !set) { 4673 twait_block->vtag_block[i].tv_sec_at_expire = 4674 now.tv_sec + time; 4675 twait_block->vtag_block[i].v_tag = tag; 4676 twait_block->vtag_block[i].lport = lport; 4677 twait_block->vtag_block[i].rport = rport; 4678 set = 1; 4679 } else if ((twait_block->vtag_block[i].v_tag) && 4680 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4681 /* Audit expires this guy */ 4682 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4683 twait_block->vtag_block[i].v_tag = 0; 4684 twait_block->vtag_block[i].lport = 0; 4685 twait_block->vtag_block[i].rport = 0; 4686 if (set == 0) { 4687 /* Reuse it for my new tag */ 4688 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4689 twait_block->vtag_block[i].v_tag = tag; 4690 twait_block->vtag_block[i].lport = lport; 4691 twait_block->vtag_block[i].rport = rport; 4692 set = 1; 4693 } 4694 } 4695 } 4696 if (set) { 4697 /* 4698 * We only do up to the block where we can 4699 * place our tag for audits 4700 */ 4701 break; 4702 } 4703 } 4704 } 4705 /* Need to add a new block to chain */ 4706 if (!set) { 4707 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4708 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4709 if (twait_block == NULL) { 4710 #ifdef INVARIANTS 4711 panic("Can not alloc tagblock"); 4712 #endif 4713 return; 4714 } 4715 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4716 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4717 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4718 twait_block->vtag_block[0].v_tag = tag; 4719 twait_block->vtag_block[0].lport = lport; 4720 twait_block->vtag_block[0].rport = rport; 4721 } 4722 } 4723 4724 4725 4726 /*- 4727 * Free the association after un-hashing the remote port. This 4728 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4729 * expect that the input to this function IS a locked TCB. 4730 * It will return 0, if it did NOT destroy the association (instead 4731 * it unlocks it. It will return NON-zero if it either destroyed the 4732 * association OR the association is already destroyed. 4733 */ 4734 int 4735 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4736 { 4737 int i; 4738 struct sctp_association *asoc; 4739 struct sctp_nets *net, *nnet; 4740 struct sctp_laddr *laddr, *naddr; 4741 struct sctp_tmit_chunk *chk, *nchk; 4742 struct sctp_asconf_addr *aparam, *naparam; 4743 struct sctp_asconf_ack *aack, *naack; 4744 struct sctp_stream_reset_list *strrst, *nstrrst; 4745 struct sctp_queued_to_read *sq, *nsq; 4746 struct sctp_stream_queue_pending *sp, *nsp; 4747 sctp_sharedkey_t *shared_key, *nshared_key; 4748 struct socket *so; 4749 4750 /* first, lets purge the entry from the hash table. */ 4751 4752 #ifdef SCTP_LOG_CLOSING 4753 sctp_log_closing(inp, stcb, 6); 4754 #endif 4755 if (stcb->asoc.state == 0) { 4756 #ifdef SCTP_LOG_CLOSING 4757 sctp_log_closing(inp, NULL, 7); 4758 #endif 4759 /* there is no asoc, really TSNH :-0 */ 4760 return (1); 4761 } 4762 if (stcb->asoc.alternate) { 4763 sctp_free_remote_addr(stcb->asoc.alternate); 4764 stcb->asoc.alternate = NULL; 4765 } 4766 /* TEMP CODE */ 4767 if (stcb->freed_from_where == 0) { 4768 /* Only record the first place free happened from */ 4769 stcb->freed_from_where = from_location; 4770 } 4771 /* TEMP CODE */ 4772 4773 asoc = &stcb->asoc; 4774 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4775 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4776 /* nothing around */ 4777 so = NULL; 4778 else 4779 so = inp->sctp_socket; 4780 4781 /* 4782 * We used timer based freeing if a reader or writer is in the way. 4783 * So we first check if we are actually being called from a timer, 4784 * if so we abort early if a reader or writer is still in the way. 4785 */ 4786 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4787 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4788 /* 4789 * is it the timer driving us? if so are the reader/writers 4790 * gone? 4791 */ 4792 if (stcb->asoc.refcnt) { 4793 /* nope, reader or writer in the way */ 4794 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4795 /* no asoc destroyed */ 4796 SCTP_TCB_UNLOCK(stcb); 4797 #ifdef SCTP_LOG_CLOSING 4798 sctp_log_closing(inp, stcb, 8); 4799 #endif 4800 return (0); 4801 } 4802 } 4803 /* now clean up any other timers */ 4804 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4805 asoc->dack_timer.self = NULL; 4806 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4807 /*- 4808 * For stream reset we don't blast this unless 4809 * it is a str-reset timer, it might be the 4810 * free-asoc timer which we DON'T want to 4811 * disturb. 4812 */ 4813 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4814 asoc->strreset_timer.self = NULL; 4815 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4816 asoc->asconf_timer.self = NULL; 4817 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4818 asoc->autoclose_timer.self = NULL; 4819 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4820 asoc->shut_guard_timer.self = NULL; 4821 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4822 asoc->delayed_event_timer.self = NULL; 4823 /* Mobility adaptation */ 4824 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4825 asoc->delete_prim_timer.self = NULL; 4826 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4827 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4828 net->rxt_timer.self = NULL; 4829 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4830 net->pmtu_timer.self = NULL; 4831 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4832 net->hb_timer.self = NULL; 4833 } 4834 /* Now the read queue needs to be cleaned up (only once) */ 4835 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4836 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4837 SCTP_INP_READ_LOCK(inp); 4838 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4839 if (sq->stcb == stcb) { 4840 sq->do_not_ref_stcb = 1; 4841 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4842 /* 4843 * If there is no end, there never will be 4844 * now. 4845 */ 4846 if (sq->end_added == 0) { 4847 /* Held for PD-API clear that. */ 4848 sq->pdapi_aborted = 1; 4849 sq->held_length = 0; 4850 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4851 /* 4852 * Need to add a PD-API 4853 * aborted indication. 4854 * Setting the control_pdapi 4855 * assures that it will be 4856 * added right after this 4857 * msg. 4858 */ 4859 uint32_t strseq; 4860 4861 stcb->asoc.control_pdapi = sq; 4862 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4863 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4864 stcb, 4865 SCTP_PARTIAL_DELIVERY_ABORTED, 4866 (void *)&strseq, 4867 SCTP_SO_LOCKED); 4868 stcb->asoc.control_pdapi = NULL; 4869 } 4870 } 4871 /* Add an end to wake them */ 4872 sq->end_added = 1; 4873 } 4874 } 4875 SCTP_INP_READ_UNLOCK(inp); 4876 if (stcb->block_entry) { 4877 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4878 stcb->block_entry->error = ECONNRESET; 4879 stcb->block_entry = NULL; 4880 } 4881 } 4882 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4883 /* 4884 * Someone holds a reference OR the socket is unaccepted 4885 * yet. 4886 */ 4887 if ((stcb->asoc.refcnt) || 4888 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4889 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4890 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4891 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4892 } 4893 SCTP_TCB_UNLOCK(stcb); 4894 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4895 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4896 /* nothing around */ 4897 so = NULL; 4898 if (so) { 4899 /* Wake any reader/writers */ 4900 sctp_sorwakeup(inp, so); 4901 sctp_sowwakeup(inp, so); 4902 } 4903 #ifdef SCTP_LOG_CLOSING 4904 sctp_log_closing(inp, stcb, 9); 4905 #endif 4906 /* no asoc destroyed */ 4907 return (0); 4908 } 4909 #ifdef SCTP_LOG_CLOSING 4910 sctp_log_closing(inp, stcb, 10); 4911 #endif 4912 /* 4913 * When I reach here, no others want to kill the assoc yet.. and I 4914 * own the lock. Now its possible an abort comes in when I do the 4915 * lock exchange below to grab all the locks to do the final take 4916 * out. to prevent this we increment the count, which will start a 4917 * timer and blow out above thus assuring us that we hold exclusive 4918 * killing of the asoc. Note that after getting back the TCB lock we 4919 * will go ahead and increment the counter back up and stop any 4920 * timer a passing stranger may have started :-S 4921 */ 4922 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4923 atomic_add_int(&stcb->asoc.refcnt, 1); 4924 4925 SCTP_TCB_UNLOCK(stcb); 4926 SCTP_INP_INFO_WLOCK(); 4927 SCTP_INP_WLOCK(inp); 4928 SCTP_TCB_LOCK(stcb); 4929 } 4930 /* Double check the GONE flag */ 4931 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4932 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4933 /* nothing around */ 4934 so = NULL; 4935 4936 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4937 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4938 /* 4939 * For TCP type we need special handling when we are 4940 * connected. We also include the peel'ed off ones to. 4941 */ 4942 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4943 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4944 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4945 if (so) { 4946 SOCK_LOCK(so); 4947 if (so->so_rcv.sb_cc == 0) { 4948 so->so_state &= ~(SS_ISCONNECTING | 4949 SS_ISDISCONNECTING | 4950 SS_ISCONFIRMING | 4951 SS_ISCONNECTED); 4952 } 4953 socantrcvmore_locked(so); 4954 sctp_sowwakeup(inp, so); 4955 sctp_sorwakeup(inp, so); 4956 SCTP_SOWAKEUP(so); 4957 } 4958 } 4959 } 4960 /* 4961 * Make it invalid too, that way if its about to run it will abort 4962 * and return. 4963 */ 4964 /* re-increment the lock */ 4965 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4966 atomic_add_int(&stcb->asoc.refcnt, -1); 4967 } 4968 if (stcb->asoc.refcnt) { 4969 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4970 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4971 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4972 SCTP_INP_INFO_WUNLOCK(); 4973 SCTP_INP_WUNLOCK(inp); 4974 } 4975 SCTP_TCB_UNLOCK(stcb); 4976 return (0); 4977 } 4978 asoc->state = 0; 4979 if (inp->sctp_tcbhash) { 4980 LIST_REMOVE(stcb, sctp_tcbhash); 4981 } 4982 if (stcb->asoc.in_asocid_hash) { 4983 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4984 } 4985 /* Now lets remove it from the list of ALL associations in the EP */ 4986 LIST_REMOVE(stcb, sctp_tcblist); 4987 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4988 SCTP_INP_INCR_REF(inp); 4989 SCTP_INP_WUNLOCK(inp); 4990 } 4991 /* pull from vtag hash */ 4992 LIST_REMOVE(stcb, sctp_asocs); 4993 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4994 inp->sctp_lport, stcb->rport); 4995 4996 /* 4997 * Now restop the timers to be sure this is paranoia at is finest! 4998 */ 4999 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 5000 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 5001 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 5002 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 5003 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 5004 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 5005 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 5006 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5007 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 5008 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 5009 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 5010 } 5011 5012 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 5013 /* 5014 * The chunk lists and such SHOULD be empty but we check them just 5015 * in case. 5016 */ 5017 /* anything on the wheel needs to be removed */ 5018 for (i = 0; i < asoc->streamoutcnt; i++) { 5019 struct sctp_stream_out *outs; 5020 5021 outs = &asoc->strmout[i]; 5022 /* now clean up any chunks here */ 5023 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 5024 TAILQ_REMOVE(&outs->outqueue, sp, next); 5025 if (sp->data) { 5026 if (so) { 5027 /* Still an open socket - report */ 5028 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 5029 SCTP_NOTIFY_DATAGRAM_UNSENT, 5030 (void *)sp, SCTP_SO_LOCKED); 5031 } 5032 if (sp->data) { 5033 sctp_m_freem(sp->data); 5034 sp->data = NULL; 5035 sp->tail_mbuf = NULL; 5036 } 5037 } 5038 if (sp->net) { 5039 sctp_free_remote_addr(sp->net); 5040 sp->net = NULL; 5041 } 5042 sctp_free_spbufspace(stcb, asoc, sp); 5043 if (sp->holds_key_ref) 5044 sctp_auth_key_release(stcb, sp->auth_keyid, SCTP_SO_LOCKED); 5045 /* Free the zone stuff */ 5046 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 5047 SCTP_DECR_STRMOQ_COUNT(); 5048 /* sa_ignore FREED_MEMORY */ 5049 } 5050 } 5051 /* sa_ignore FREED_MEMORY */ 5052 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 5053 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 5054 SCTP_FREE(strrst, SCTP_M_STRESET); 5055 } 5056 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 5057 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 5058 if (sq->data) { 5059 sctp_m_freem(sq->data); 5060 sq->data = NULL; 5061 } 5062 sctp_free_remote_addr(sq->whoFrom); 5063 sq->whoFrom = NULL; 5064 sq->stcb = NULL; 5065 /* Free the ctl entry */ 5066 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 5067 SCTP_DECR_READQ_COUNT(); 5068 /* sa_ignore FREED_MEMORY */ 5069 } 5070 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 5071 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5072 if (chk->data) { 5073 sctp_m_freem(chk->data); 5074 chk->data = NULL; 5075 } 5076 if (chk->holds_key_ref) 5077 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5078 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5079 SCTP_DECR_CHK_COUNT(); 5080 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5081 asoc->free_chunk_cnt--; 5082 /* sa_ignore FREED_MEMORY */ 5083 } 5084 /* pending send queue SHOULD be empty */ 5085 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5086 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5087 if (chk->data) { 5088 if (so) { 5089 /* Still a socket? */ 5090 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 5091 SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED); 5092 } 5093 if (chk->data) { 5094 sctp_m_freem(chk->data); 5095 chk->data = NULL; 5096 } 5097 } 5098 if (chk->holds_key_ref) 5099 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5100 if (chk->whoTo) { 5101 sctp_free_remote_addr(chk->whoTo); 5102 chk->whoTo = NULL; 5103 } 5104 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5105 SCTP_DECR_CHK_COUNT(); 5106 /* sa_ignore FREED_MEMORY */ 5107 } 5108 /* sent queue SHOULD be empty */ 5109 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5110 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5111 if (chk->data) { 5112 if (so) { 5113 /* Still a socket? */ 5114 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 5115 SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED); 5116 } 5117 if (chk->data) { 5118 sctp_m_freem(chk->data); 5119 chk->data = NULL; 5120 } 5121 } 5122 if (chk->holds_key_ref) 5123 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5124 sctp_free_remote_addr(chk->whoTo); 5125 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5126 SCTP_DECR_CHK_COUNT(); 5127 /* sa_ignore FREED_MEMORY */ 5128 } 5129 /* control queue MAY not be empty */ 5130 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5131 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5132 if (chk->data) { 5133 sctp_m_freem(chk->data); 5134 chk->data = NULL; 5135 } 5136 if (chk->holds_key_ref) 5137 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5138 sctp_free_remote_addr(chk->whoTo); 5139 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5140 SCTP_DECR_CHK_COUNT(); 5141 /* sa_ignore FREED_MEMORY */ 5142 } 5143 /* ASCONF queue MAY not be empty */ 5144 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5145 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5146 if (chk->data) { 5147 sctp_m_freem(chk->data); 5148 chk->data = NULL; 5149 } 5150 if (chk->holds_key_ref) 5151 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5152 sctp_free_remote_addr(chk->whoTo); 5153 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5154 SCTP_DECR_CHK_COUNT(); 5155 /* sa_ignore FREED_MEMORY */ 5156 } 5157 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5158 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5159 if (chk->data) { 5160 sctp_m_freem(chk->data); 5161 chk->data = NULL; 5162 } 5163 if (chk->holds_key_ref) 5164 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5165 sctp_free_remote_addr(chk->whoTo); 5166 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5167 SCTP_DECR_CHK_COUNT(); 5168 /* sa_ignore FREED_MEMORY */ 5169 } 5170 5171 if (asoc->mapping_array) { 5172 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5173 asoc->mapping_array = NULL; 5174 } 5175 if (asoc->nr_mapping_array) { 5176 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5177 asoc->nr_mapping_array = NULL; 5178 } 5179 /* the stream outs */ 5180 if (asoc->strmout) { 5181 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5182 asoc->strmout = NULL; 5183 } 5184 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5185 if (asoc->strmin) { 5186 struct sctp_queued_to_read *ctl, *nctl; 5187 5188 for (i = 0; i < asoc->streamincnt; i++) { 5189 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5190 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5191 sctp_free_remote_addr(ctl->whoFrom); 5192 if (ctl->data) { 5193 sctp_m_freem(ctl->data); 5194 ctl->data = NULL; 5195 } 5196 /* 5197 * We don't free the address here since all 5198 * the net's were freed above. 5199 */ 5200 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5201 SCTP_DECR_READQ_COUNT(); 5202 } 5203 } 5204 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5205 asoc->strmin = NULL; 5206 } 5207 asoc->streamincnt = 0; 5208 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5209 #ifdef INVARIANTS 5210 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5211 panic("no net's left alloc'ed, or list points to itself"); 5212 } 5213 #endif 5214 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5215 sctp_free_remote_addr(net); 5216 } 5217 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5218 /* sa_ignore FREED_MEMORY */ 5219 sctp_remove_laddr(laddr); 5220 } 5221 5222 /* pending asconf (address) parameters */ 5223 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5224 /* sa_ignore FREED_MEMORY */ 5225 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5226 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5227 } 5228 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5229 /* sa_ignore FREED_MEMORY */ 5230 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5231 if (aack->data != NULL) { 5232 sctp_m_freem(aack->data); 5233 } 5234 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5235 } 5236 /* clean up auth stuff */ 5237 if (asoc->local_hmacs) 5238 sctp_free_hmaclist(asoc->local_hmacs); 5239 if (asoc->peer_hmacs) 5240 sctp_free_hmaclist(asoc->peer_hmacs); 5241 5242 if (asoc->local_auth_chunks) 5243 sctp_free_chunklist(asoc->local_auth_chunks); 5244 if (asoc->peer_auth_chunks) 5245 sctp_free_chunklist(asoc->peer_auth_chunks); 5246 5247 sctp_free_authinfo(&asoc->authinfo); 5248 5249 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5250 LIST_REMOVE(shared_key, next); 5251 sctp_free_sharedkey(shared_key); 5252 /* sa_ignore FREED_MEMORY */ 5253 } 5254 5255 /* Insert new items here :> */ 5256 5257 /* Get rid of LOCK */ 5258 SCTP_TCB_LOCK_DESTROY(stcb); 5259 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5260 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5261 SCTP_INP_INFO_WUNLOCK(); 5262 SCTP_INP_RLOCK(inp); 5263 } 5264 #ifdef SCTP_TRACK_FREED_ASOCS 5265 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5266 /* now clean up the tasoc itself */ 5267 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5268 SCTP_DECR_ASOC_COUNT(); 5269 } else { 5270 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5271 } 5272 #else 5273 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5274 SCTP_DECR_ASOC_COUNT(); 5275 #endif 5276 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5277 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5278 /* 5279 * If its NOT the inp_free calling us AND sctp_close 5280 * as been called, we call back... 5281 */ 5282 SCTP_INP_RUNLOCK(inp); 5283 /* 5284 * This will start the kill timer (if we are the 5285 * last one) since we hold an increment yet. But 5286 * this is the only safe way to do this since 5287 * otherwise if the socket closes at the same time 5288 * we are here we might collide in the cleanup. 5289 */ 5290 sctp_inpcb_free(inp, 5291 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5292 SCTP_CALLED_DIRECTLY_NOCMPSET); 5293 SCTP_INP_DECR_REF(inp); 5294 goto out_of; 5295 } else { 5296 /* The socket is still open. */ 5297 SCTP_INP_DECR_REF(inp); 5298 } 5299 } 5300 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5301 SCTP_INP_RUNLOCK(inp); 5302 } 5303 out_of: 5304 /* destroyed the asoc */ 5305 #ifdef SCTP_LOG_CLOSING 5306 sctp_log_closing(inp, NULL, 11); 5307 #endif 5308 return (1); 5309 } 5310 5311 5312 5313 /* 5314 * determine if a destination is "reachable" based upon the addresses bound 5315 * to the current endpoint (e.g. only v4 or v6 currently bound) 5316 */ 5317 /* 5318 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5319 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5320 * types bound as its endpoint 5321 */ 5322 int 5323 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5324 { 5325 struct sctp_inpcb *inp; 5326 int answer; 5327 5328 /* 5329 * No locks here, the TCB, in all cases is already locked and an 5330 * assoc is up. There is either a INP lock by the caller applied (in 5331 * asconf case when deleting an address) or NOT in the HB case, 5332 * however if HB then the INP increment is up and the INP will not 5333 * be removed (on top of the fact that we have a TCB lock). So we 5334 * only want to read the sctp_flags, which is either bound-all or 5335 * not.. no protection needed since once an assoc is up you can't be 5336 * changing your binding. 5337 */ 5338 inp = stcb->sctp_ep; 5339 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5340 /* if bound all, destination is not restricted */ 5341 /* 5342 * RRS: Question during lock work: Is this correct? If you 5343 * are bound-all you still might need to obey the V4--V6 5344 * flags??? IMO this bound-all stuff needs to be removed! 5345 */ 5346 return (1); 5347 } 5348 /* NOTE: all "scope" checks are done when local addresses are added */ 5349 switch (destaddr->sa_family) { 5350 case AF_INET6: 5351 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5352 break; 5353 case AF_INET: 5354 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5355 break; 5356 default: 5357 /* invalid family, so it's unreachable */ 5358 answer = 0; 5359 break; 5360 } 5361 return (answer); 5362 } 5363 5364 /* 5365 * update the inp_vflags on an endpoint 5366 */ 5367 static void 5368 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5369 { 5370 struct sctp_laddr *laddr; 5371 5372 /* first clear the flag */ 5373 inp->ip_inp.inp.inp_vflag = 0; 5374 /* set the flag based on addresses on the ep list */ 5375 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5376 if (laddr->ifa == NULL) { 5377 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5378 __FUNCTION__); 5379 continue; 5380 } 5381 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5382 continue; 5383 } 5384 switch (laddr->ifa->address.sa.sa_family) { 5385 #ifdef INET6 5386 case AF_INET6: 5387 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5388 break; 5389 #endif 5390 #ifdef INET 5391 case AF_INET: 5392 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5393 break; 5394 #endif 5395 default: 5396 break; 5397 } 5398 } 5399 } 5400 5401 /* 5402 * Add the address to the endpoint local address list There is nothing to be 5403 * done if we are bound to all addresses 5404 */ 5405 void 5406 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5407 { 5408 struct sctp_laddr *laddr; 5409 int fnd, error = 0; 5410 5411 fnd = 0; 5412 5413 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5414 /* You are already bound to all. You have it already */ 5415 return; 5416 } 5417 #ifdef INET6 5418 if (ifa->address.sa.sa_family == AF_INET6) { 5419 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5420 /* Can't bind a non-useable addr. */ 5421 return; 5422 } 5423 } 5424 #endif 5425 /* first, is it already present? */ 5426 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5427 if (laddr->ifa == ifa) { 5428 fnd = 1; 5429 break; 5430 } 5431 } 5432 5433 if (fnd == 0) { 5434 /* Not in the ep list */ 5435 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5436 if (error != 0) 5437 return; 5438 inp->laddr_count++; 5439 /* update inp_vflag flags */ 5440 switch (ifa->address.sa.sa_family) { 5441 #ifdef INET6 5442 case AF_INET6: 5443 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5444 break; 5445 #endif 5446 #ifdef INET6 5447 case AF_INET: 5448 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5449 break; 5450 #endif 5451 default: 5452 break; 5453 } 5454 } 5455 return; 5456 } 5457 5458 5459 /* 5460 * select a new (hopefully reachable) destination net (should only be used 5461 * when we deleted an ep addr that is the only usable source address to reach 5462 * the destination net) 5463 */ 5464 static void 5465 sctp_select_primary_destination(struct sctp_tcb *stcb) 5466 { 5467 struct sctp_nets *net; 5468 5469 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5470 /* for now, we'll just pick the first reachable one we find */ 5471 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5472 continue; 5473 if (sctp_destination_is_reachable(stcb, 5474 (struct sockaddr *)&net->ro._l_addr)) { 5475 /* found a reachable destination */ 5476 stcb->asoc.primary_destination = net; 5477 } 5478 } 5479 /* I can't there from here! ...we're gonna die shortly... */ 5480 } 5481 5482 5483 /* 5484 * Delete the address from the endpoint local address list There is nothing 5485 * to be done if we are bound to all addresses 5486 */ 5487 void 5488 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5489 { 5490 struct sctp_laddr *laddr; 5491 int fnd; 5492 5493 fnd = 0; 5494 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5495 /* You are already bound to all. You have it already */ 5496 return; 5497 } 5498 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5499 if (laddr->ifa == ifa) { 5500 fnd = 1; 5501 break; 5502 } 5503 } 5504 if (fnd && (inp->laddr_count < 2)) { 5505 /* can't delete unless there are at LEAST 2 addresses */ 5506 return; 5507 } 5508 if (fnd) { 5509 /* 5510 * clean up any use of this address go through our 5511 * associations and clear any last_used_address that match 5512 * this one for each assoc, see if a new primary_destination 5513 * is needed 5514 */ 5515 struct sctp_tcb *stcb; 5516 5517 /* clean up "next_addr_touse" */ 5518 if (inp->next_addr_touse == laddr) 5519 /* delete this address */ 5520 inp->next_addr_touse = NULL; 5521 5522 /* clean up "last_used_address" */ 5523 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5524 struct sctp_nets *net; 5525 5526 SCTP_TCB_LOCK(stcb); 5527 if (stcb->asoc.last_used_address == laddr) 5528 /* delete this address */ 5529 stcb->asoc.last_used_address = NULL; 5530 /* 5531 * Now spin through all the nets and purge any ref 5532 * to laddr 5533 */ 5534 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5535 if (net->ro._s_addr && 5536 (net->ro._s_addr->ifa == laddr->ifa)) { 5537 /* Yep, purge src address selected */ 5538 sctp_rtentry_t *rt; 5539 5540 /* delete this address if cached */ 5541 rt = net->ro.ro_rt; 5542 if (rt != NULL) { 5543 RTFREE(rt); 5544 net->ro.ro_rt = NULL; 5545 } 5546 sctp_free_ifa(net->ro._s_addr); 5547 net->ro._s_addr = NULL; 5548 net->src_addr_selected = 0; 5549 } 5550 } 5551 SCTP_TCB_UNLOCK(stcb); 5552 } /* for each tcb */ 5553 /* remove it from the ep list */ 5554 sctp_remove_laddr(laddr); 5555 inp->laddr_count--; 5556 /* update inp_vflag flags */ 5557 sctp_update_ep_vflag(inp); 5558 } 5559 return; 5560 } 5561 5562 /* 5563 * Add the address to the TCB local address restricted list. 5564 * This is a "pending" address list (eg. addresses waiting for an 5565 * ASCONF-ACK response) and cannot be used as a valid source address. 5566 */ 5567 void 5568 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5569 { 5570 struct sctp_inpcb *inp; 5571 struct sctp_laddr *laddr; 5572 struct sctpladdr *list; 5573 5574 /* 5575 * Assumes TCB is locked.. and possibly the INP. May need to 5576 * confirm/fix that if we need it and is not the case. 5577 */ 5578 list = &stcb->asoc.sctp_restricted_addrs; 5579 5580 inp = stcb->sctp_ep; 5581 #ifdef INET6 5582 if (ifa->address.sa.sa_family == AF_INET6) { 5583 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5584 /* Can't bind a non-existent addr. */ 5585 return; 5586 } 5587 } 5588 #endif 5589 /* does the address already exist? */ 5590 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5591 if (laddr->ifa == ifa) { 5592 return; 5593 } 5594 } 5595 5596 /* add to the list */ 5597 (void)sctp_insert_laddr(list, ifa, 0); 5598 return; 5599 } 5600 5601 /* 5602 * insert an laddr entry with the given ifa for the desired list 5603 */ 5604 int 5605 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5606 { 5607 struct sctp_laddr *laddr; 5608 5609 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5610 if (laddr == NULL) { 5611 /* out of memory? */ 5612 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5613 return (EINVAL); 5614 } 5615 SCTP_INCR_LADDR_COUNT(); 5616 bzero(laddr, sizeof(*laddr)); 5617 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5618 laddr->ifa = ifa; 5619 laddr->action = act; 5620 atomic_add_int(&ifa->refcount, 1); 5621 /* insert it */ 5622 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5623 5624 return (0); 5625 } 5626 5627 /* 5628 * Remove an laddr entry from the local address list (on an assoc) 5629 */ 5630 void 5631 sctp_remove_laddr(struct sctp_laddr *laddr) 5632 { 5633 5634 /* remove from the list */ 5635 LIST_REMOVE(laddr, sctp_nxt_addr); 5636 sctp_free_ifa(laddr->ifa); 5637 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5638 SCTP_DECR_LADDR_COUNT(); 5639 } 5640 5641 /* 5642 * Remove a local address from the TCB local address restricted list 5643 */ 5644 void 5645 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5646 { 5647 struct sctp_inpcb *inp; 5648 struct sctp_laddr *laddr; 5649 5650 /* 5651 * This is called by asconf work. It is assumed that a) The TCB is 5652 * locked and b) The INP is locked. This is true in as much as I can 5653 * trace through the entry asconf code where I did these locks. 5654 * Again, the ASCONF code is a bit different in that it does lock 5655 * the INP during its work often times. This must be since we don't 5656 * want other proc's looking up things while what they are looking 5657 * up is changing :-D 5658 */ 5659 5660 inp = stcb->sctp_ep; 5661 /* if subset bound and don't allow ASCONF's, can't delete last */ 5662 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5663 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5664 if (stcb->sctp_ep->laddr_count < 2) { 5665 /* can't delete last address */ 5666 return; 5667 } 5668 } 5669 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5670 /* remove the address if it exists */ 5671 if (laddr->ifa == NULL) 5672 continue; 5673 if (laddr->ifa == ifa) { 5674 sctp_remove_laddr(laddr); 5675 return; 5676 } 5677 } 5678 5679 /* address not found! */ 5680 return; 5681 } 5682 5683 /* 5684 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5685 */ 5686 /* sysctl */ 5687 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5688 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5689 5690 5691 5692 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5693 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5694 int *sctp_cpuarry = NULL; 5695 void 5696 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5697 { 5698 /* Queue a packet to a processor for the specified core */ 5699 struct sctp_mcore_queue *qent; 5700 struct sctp_mcore_ctrl *wkq; 5701 int need_wake = 0; 5702 5703 if (sctp_mcore_workers == NULL) { 5704 /* Something went way bad during setup */ 5705 sctp_input_with_port(m, off, 0); 5706 return; 5707 } 5708 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5709 (sizeof(struct sctp_mcore_queue)), 5710 SCTP_M_MCORE); 5711 if (qent == NULL) { 5712 /* This is trouble */ 5713 sctp_input_with_port(m, off, 0); 5714 return; 5715 } 5716 qent->vn = curvnet; 5717 qent->m = m; 5718 qent->off = off; 5719 qent->v6 = 0; 5720 wkq = &sctp_mcore_workers[cpu_to_use]; 5721 SCTP_MCORE_QLOCK(wkq); 5722 5723 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5724 if (wkq->running == 0) { 5725 need_wake = 1; 5726 } 5727 SCTP_MCORE_QUNLOCK(wkq); 5728 if (need_wake) { 5729 wakeup(&wkq->running); 5730 } 5731 } 5732 5733 static void 5734 sctp_mcore_thread(void *arg) 5735 { 5736 5737 struct sctp_mcore_ctrl *wkq; 5738 struct sctp_mcore_queue *qent; 5739 5740 wkq = (struct sctp_mcore_ctrl *)arg; 5741 struct mbuf *m; 5742 int off, v6; 5743 5744 /* Wait for first tickle */ 5745 SCTP_MCORE_LOCK(wkq); 5746 wkq->running = 0; 5747 msleep(&wkq->running, 5748 &wkq->core_mtx, 5749 0, "wait for pkt", 0); 5750 SCTP_MCORE_UNLOCK(wkq); 5751 5752 /* Bind to our cpu */ 5753 thread_lock(curthread); 5754 sched_bind(curthread, wkq->cpuid); 5755 thread_unlock(curthread); 5756 5757 /* Now lets start working */ 5758 SCTP_MCORE_LOCK(wkq); 5759 /* Now grab lock and go */ 5760 while (1) { 5761 SCTP_MCORE_QLOCK(wkq); 5762 skip_sleep: 5763 wkq->running = 1; 5764 qent = TAILQ_FIRST(&wkq->que); 5765 if (qent) { 5766 TAILQ_REMOVE(&wkq->que, qent, next); 5767 SCTP_MCORE_QUNLOCK(wkq); 5768 CURVNET_SET(qent->vn); 5769 m = qent->m; 5770 off = qent->off; 5771 v6 = qent->v6; 5772 SCTP_FREE(qent, SCTP_M_MCORE); 5773 if (v6 == 0) { 5774 sctp_input_with_port(m, off, 0); 5775 } else { 5776 printf("V6 not yet supported\n"); 5777 sctp_m_freem(m); 5778 } 5779 CURVNET_RESTORE(); 5780 SCTP_MCORE_QLOCK(wkq); 5781 } 5782 wkq->running = 0; 5783 if (!TAILQ_EMPTY(&wkq->que)) { 5784 goto skip_sleep; 5785 } 5786 SCTP_MCORE_QUNLOCK(wkq); 5787 msleep(&wkq->running, 5788 &wkq->core_mtx, 5789 0, "wait for pkt", 0); 5790 }; 5791 } 5792 5793 static void 5794 sctp_startup_mcore_threads(void) 5795 { 5796 int i, cpu; 5797 5798 if (mp_ncpus == 1) 5799 return; 5800 5801 if (sctp_mcore_workers != NULL) { 5802 /* 5803 * Already been here in some previous vnet? 5804 */ 5805 return; 5806 } 5807 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5808 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5809 SCTP_M_MCORE); 5810 if (sctp_mcore_workers == NULL) { 5811 /* TSNH I hope */ 5812 return; 5813 } 5814 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5815 sizeof(struct sctp_mcore_ctrl))); 5816 /* Init the structures */ 5817 for (i = 0; i <= mp_maxid; i++) { 5818 TAILQ_INIT(&sctp_mcore_workers[i].que); 5819 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5820 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5821 sctp_mcore_workers[i].cpuid = i; 5822 } 5823 if (sctp_cpuarry == NULL) { 5824 SCTP_MALLOC(sctp_cpuarry, int *, 5825 (mp_ncpus * sizeof(int)), 5826 SCTP_M_MCORE); 5827 i = 0; 5828 CPU_FOREACH(cpu) { 5829 sctp_cpuarry[i] = cpu; 5830 i++; 5831 } 5832 } 5833 /* Now start them all */ 5834 CPU_FOREACH(cpu) { 5835 (void)kproc_create(sctp_mcore_thread, 5836 (void *)&sctp_mcore_workers[cpu], 5837 &sctp_mcore_workers[cpu].thread_proc, 5838 RFPROC, 5839 SCTP_KTHREAD_PAGES, 5840 SCTP_MCORE_NAME); 5841 5842 } 5843 } 5844 5845 #endif 5846 5847 void 5848 sctp_pcb_init() 5849 { 5850 /* 5851 * SCTP initialization for the PCB structures should be called by 5852 * the sctp_init() funciton. 5853 */ 5854 int i; 5855 struct timeval tv; 5856 5857 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5858 /* error I was called twice */ 5859 return; 5860 } 5861 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5862 5863 #if defined(SCTP_LOCAL_TRACE_BUF) 5864 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5865 #endif 5866 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5867 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5868 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5869 SCTP_M_MCORE); 5870 #endif 5871 (void)SCTP_GETTIME_TIMEVAL(&tv); 5872 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5873 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5874 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5875 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5876 #else 5877 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5878 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5879 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5880 #endif 5881 /* init the empty list of (All) Endpoints */ 5882 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5883 5884 5885 /* init the hash table of endpoints */ 5886 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5887 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5888 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5889 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5890 &SCTP_BASE_INFO(hashasocmark)); 5891 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5892 &SCTP_BASE_INFO(hashmark)); 5893 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5894 &SCTP_BASE_INFO(hashtcpmark)); 5895 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5896 5897 5898 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5899 &SCTP_BASE_INFO(hashvrfmark)); 5900 5901 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5902 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5903 /* init the zones */ 5904 /* 5905 * FIX ME: Should check for NULL returns, but if it does fail we are 5906 * doomed to panic anyways... add later maybe. 5907 */ 5908 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5909 sizeof(struct sctp_inpcb), maxsockets); 5910 5911 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5912 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5913 5914 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5915 sizeof(struct sctp_laddr), 5916 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5917 5918 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5919 sizeof(struct sctp_nets), 5920 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5921 5922 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5923 sizeof(struct sctp_tmit_chunk), 5924 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5925 5926 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5927 sizeof(struct sctp_queued_to_read), 5928 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5929 5930 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5931 sizeof(struct sctp_stream_queue_pending), 5932 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5933 5934 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5935 sizeof(struct sctp_asconf), 5936 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5937 5938 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5939 sizeof(struct sctp_asconf_ack), 5940 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5941 5942 5943 /* Master Lock INIT for info structure */ 5944 SCTP_INP_INFO_LOCK_INIT(); 5945 SCTP_STATLOG_INIT_LOCK(); 5946 5947 SCTP_IPI_COUNT_INIT(); 5948 SCTP_IPI_ADDR_INIT(); 5949 #ifdef SCTP_PACKET_LOGGING 5950 SCTP_IP_PKTLOG_INIT(); 5951 #endif 5952 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5953 5954 SCTP_WQ_ADDR_INIT(); 5955 /* not sure if we need all the counts */ 5956 SCTP_BASE_INFO(ipi_count_ep) = 0; 5957 /* assoc/tcb zone info */ 5958 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5959 /* local addrlist zone info */ 5960 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5961 /* remote addrlist zone info */ 5962 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5963 /* chunk info */ 5964 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5965 5966 /* socket queue zone info */ 5967 SCTP_BASE_INFO(ipi_count_readq) = 0; 5968 5969 /* stream out queue cont */ 5970 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5971 5972 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5973 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5974 5975 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5976 5977 /* Init the TIMEWAIT list */ 5978 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5979 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5980 } 5981 5982 sctp_startup_iterator(); 5983 5984 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5985 sctp_startup_mcore_threads(); 5986 #endif 5987 5988 /* 5989 * INIT the default VRF which for BSD is the only one, other O/S's 5990 * may have more. But initially they must start with one and then 5991 * add the VRF's as addresses are added. 5992 */ 5993 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5994 } 5995 5996 /* 5997 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5998 */ 5999 void 6000 sctp_pcb_finish(void) 6001 { 6002 struct sctp_vrflist *vrf_bucket; 6003 struct sctp_vrf *vrf, *nvrf; 6004 struct sctp_ifn *ifn, *nifn; 6005 struct sctp_ifa *ifa, *nifa; 6006 struct sctpvtaghead *chain; 6007 struct sctp_tagblock *twait_block, *prev_twait_block; 6008 struct sctp_laddr *wi, *nwi; 6009 int i; 6010 6011 /* 6012 * Free BSD the it thread never exits but we do clean up. The only 6013 * way freebsd reaches here if we have VRF's but we still add the 6014 * ifdef to make it compile on old versions. 6015 */ 6016 { 6017 struct sctp_iterator *it, *nit; 6018 6019 SCTP_IPI_ITERATOR_WQ_LOCK(); 6020 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 6021 if (it->vn != curvnet) { 6022 continue; 6023 } 6024 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6025 if (it->function_atend != NULL) { 6026 (*it->function_atend) (it->pointer, it->val); 6027 } 6028 SCTP_FREE(it, SCTP_M_ITER); 6029 } 6030 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6031 SCTP_ITERATOR_LOCK(); 6032 if ((sctp_it_ctl.cur_it) && 6033 (sctp_it_ctl.cur_it->vn == curvnet)) { 6034 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 6035 } 6036 SCTP_ITERATOR_UNLOCK(); 6037 } 6038 6039 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 6040 SCTP_WQ_ADDR_LOCK(); 6041 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 6042 LIST_REMOVE(wi, sctp_nxt_addr); 6043 SCTP_DECR_LADDR_COUNT(); 6044 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 6045 } 6046 SCTP_WQ_ADDR_UNLOCK(); 6047 6048 /* 6049 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 6050 * destroyed first). 6051 */ 6052 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 6053 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 6054 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 6055 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 6056 /* free the ifa */ 6057 LIST_REMOVE(ifa, next_bucket); 6058 LIST_REMOVE(ifa, next_ifa); 6059 SCTP_FREE(ifa, SCTP_M_IFA); 6060 } 6061 /* free the ifn */ 6062 LIST_REMOVE(ifn, next_bucket); 6063 LIST_REMOVE(ifn, next_ifn); 6064 SCTP_FREE(ifn, SCTP_M_IFN); 6065 } 6066 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 6067 /* free the vrf */ 6068 LIST_REMOVE(vrf, next_vrf); 6069 SCTP_FREE(vrf, SCTP_M_VRF); 6070 } 6071 /* free the vrf hashes */ 6072 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6073 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6074 6075 /* 6076 * free the TIMEWAIT list elements malloc'd in the function 6077 * sctp_add_vtag_to_timewait()... 6078 */ 6079 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6080 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6081 if (!LIST_EMPTY(chain)) { 6082 prev_twait_block = NULL; 6083 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6084 if (prev_twait_block) { 6085 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6086 } 6087 prev_twait_block = twait_block; 6088 } 6089 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6090 } 6091 } 6092 6093 /* free the locks and mutexes */ 6094 #ifdef SCTP_PACKET_LOGGING 6095 SCTP_IP_PKTLOG_DESTROY(); 6096 #endif 6097 SCTP_IPI_ADDR_DESTROY(); 6098 SCTP_STATLOG_DESTROY(); 6099 SCTP_INP_INFO_LOCK_DESTROY(); 6100 6101 SCTP_WQ_ADDR_DESTROY(); 6102 6103 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6104 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6105 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6106 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6107 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6108 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6109 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6110 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6111 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6112 /* Get rid of other stuff to */ 6113 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6114 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6115 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6116 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6117 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6118 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6119 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6120 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6121 #endif 6122 } 6123 6124 6125 int 6126 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6127 int iphlen, int offset, int limit, struct sctphdr *sh, 6128 struct sockaddr *altsa) 6129 { 6130 /* 6131 * grub through the INIT pulling addresses and loading them to the 6132 * nets structure in the asoc. The from address in the mbuf should 6133 * also be loaded (if it is not already). This routine can be called 6134 * with either INIT or INIT-ACK's as long as the m points to the IP 6135 * packet and the offset points to the beginning of the parameters. 6136 */ 6137 struct sctp_inpcb *inp, *l_inp; 6138 struct sctp_nets *net, *nnet, *net_tmp; 6139 struct ip *iph; 6140 struct sctp_paramhdr *phdr, parm_buf; 6141 struct sctp_tcb *stcb_tmp; 6142 uint16_t ptype, plen; 6143 struct sockaddr *sa; 6144 struct sockaddr_storage dest_store; 6145 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 6146 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6147 struct sctp_auth_random *p_random = NULL; 6148 uint16_t random_len = 0; 6149 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6150 struct sctp_auth_hmac_algo *hmacs = NULL; 6151 uint16_t hmacs_len = 0; 6152 uint8_t saw_asconf = 0; 6153 uint8_t saw_asconf_ack = 0; 6154 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6155 struct sctp_auth_chunk_list *chunks = NULL; 6156 uint16_t num_chunks = 0; 6157 sctp_key_t *new_key; 6158 uint32_t keylen; 6159 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6160 uint8_t ecn_allowed; 6161 6162 #ifdef INET 6163 struct sockaddr_in sin; 6164 6165 #endif 6166 #ifdef INET6 6167 struct sockaddr_in6 sin6; 6168 6169 #endif 6170 6171 /* First get the destination address setup too. */ 6172 #ifdef INET 6173 memset(&sin, 0, sizeof(sin)); 6174 sin.sin_family = AF_INET; 6175 sin.sin_len = sizeof(sin); 6176 sin.sin_port = stcb->rport; 6177 #endif 6178 #ifdef INET6 6179 memset(&sin6, 0, sizeof(sin6)); 6180 sin6.sin6_family = AF_INET6; 6181 sin6.sin6_len = sizeof(struct sockaddr_in6); 6182 sin6.sin6_port = stcb->rport; 6183 #endif 6184 if (altsa == NULL) { 6185 iph = mtod(m, struct ip *); 6186 switch (iph->ip_v) { 6187 #ifdef INET 6188 case IPVERSION: 6189 { 6190 /* its IPv4 */ 6191 struct sockaddr_in *sin_2; 6192 6193 sin_2 = (struct sockaddr_in *)(local_sa); 6194 memset(sin_2, 0, sizeof(sin)); 6195 sin_2->sin_family = AF_INET; 6196 sin_2->sin_len = sizeof(sin); 6197 sin_2->sin_port = sh->dest_port; 6198 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 6199 sin.sin_addr = iph->ip_src; 6200 sa = (struct sockaddr *)&sin; 6201 break; 6202 } 6203 #endif 6204 #ifdef INET6 6205 case IPV6_VERSION >> 4: 6206 { 6207 /* its IPv6 */ 6208 struct ip6_hdr *ip6; 6209 struct sockaddr_in6 *sin6_2; 6210 6211 ip6 = mtod(m, struct ip6_hdr *); 6212 sin6_2 = (struct sockaddr_in6 *)(local_sa); 6213 memset(sin6_2, 0, sizeof(sin6)); 6214 sin6_2->sin6_family = AF_INET6; 6215 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 6216 sin6_2->sin6_port = sh->dest_port; 6217 sin6.sin6_addr = ip6->ip6_src; 6218 sa = (struct sockaddr *)&sin6; 6219 break; 6220 } 6221 #endif 6222 default: 6223 return (-1); 6224 break; 6225 } 6226 } else { 6227 /* 6228 * For cookies we use the src address NOT from the packet 6229 * but from the original INIT 6230 */ 6231 sa = altsa; 6232 } 6233 /* Turn off ECN until we get through all params */ 6234 ecn_allowed = 0; 6235 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6236 /* mark all addresses that we have currently on the list */ 6237 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6238 } 6239 /* does the source address already exist? if so skip it */ 6240 l_inp = inp = stcb->sctp_ep; 6241 6242 atomic_add_int(&stcb->asoc.refcnt, 1); 6243 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 6244 atomic_add_int(&stcb->asoc.refcnt, -1); 6245 6246 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6247 /* we must add the source address */ 6248 /* no scope set here since we have a tcb already. */ 6249 switch (sa->sa_family) { 6250 #ifdef INET 6251 case AF_INET: 6252 if (stcb->asoc.ipv4_addr_legal) { 6253 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6254 return (-1); 6255 } 6256 } 6257 break; 6258 #endif 6259 #ifdef INET6 6260 case AF_INET6: 6261 if (stcb->asoc.ipv6_addr_legal) { 6262 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6263 return (-2); 6264 } 6265 } 6266 break; 6267 #endif 6268 default: 6269 break; 6270 } 6271 } else { 6272 if (net_tmp != NULL && stcb_tmp == stcb) { 6273 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6274 } else if (stcb_tmp != stcb) { 6275 /* It belongs to another association? */ 6276 if (stcb_tmp) 6277 SCTP_TCB_UNLOCK(stcb_tmp); 6278 return (-3); 6279 } 6280 } 6281 if (stcb->asoc.state == 0) { 6282 /* the assoc was freed? */ 6283 return (-4); 6284 } 6285 /* 6286 * peer must explicitly turn this on. This may have been initialized 6287 * to be "on" in order to allow local addr changes while INIT's are 6288 * in flight. 6289 */ 6290 stcb->asoc.peer_supports_asconf = 0; 6291 /* now we must go through each of the params. */ 6292 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6293 while (phdr) { 6294 ptype = ntohs(phdr->param_type); 6295 plen = ntohs(phdr->param_length); 6296 /* 6297 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 6298 * (int)plen); 6299 */ 6300 if (offset + plen > limit) { 6301 break; 6302 } 6303 if (plen == 0) { 6304 break; 6305 } 6306 #ifdef INET 6307 if (ptype == SCTP_IPV4_ADDRESS) { 6308 if (stcb->asoc.ipv4_addr_legal) { 6309 struct sctp_ipv4addr_param *p4, p4_buf; 6310 6311 /* ok get the v4 address and check/add */ 6312 phdr = sctp_get_next_param(m, offset, 6313 (struct sctp_paramhdr *)&p4_buf, 6314 sizeof(p4_buf)); 6315 if (plen != sizeof(struct sctp_ipv4addr_param) || 6316 phdr == NULL) { 6317 return (-5); 6318 } 6319 p4 = (struct sctp_ipv4addr_param *)phdr; 6320 sin.sin_addr.s_addr = p4->addr; 6321 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6322 /* Skip multi-cast addresses */ 6323 goto next_param; 6324 } 6325 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6326 (sin.sin_addr.s_addr == INADDR_ANY)) { 6327 goto next_param; 6328 } 6329 sa = (struct sockaddr *)&sin; 6330 inp = stcb->sctp_ep; 6331 atomic_add_int(&stcb->asoc.refcnt, 1); 6332 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6333 local_sa, stcb); 6334 atomic_add_int(&stcb->asoc.refcnt, -1); 6335 6336 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6337 inp == NULL) { 6338 /* we must add the source address */ 6339 /* 6340 * no scope set since we have a tcb 6341 * already 6342 */ 6343 6344 /* 6345 * we must validate the state again 6346 * here 6347 */ 6348 add_it_now: 6349 if (stcb->asoc.state == 0) { 6350 /* the assoc was freed? */ 6351 return (-7); 6352 } 6353 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6354 return (-8); 6355 } 6356 } else if (stcb_tmp == stcb) { 6357 if (stcb->asoc.state == 0) { 6358 /* the assoc was freed? */ 6359 return (-10); 6360 } 6361 if (net != NULL) { 6362 /* clear flag */ 6363 net->dest_state &= 6364 ~SCTP_ADDR_NOT_IN_ASSOC; 6365 } 6366 } else { 6367 /* 6368 * strange, address is in another 6369 * assoc? straighten out locks. 6370 */ 6371 if (stcb_tmp) { 6372 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6373 /* 6374 * in setup state we 6375 * abort this guy 6376 */ 6377 sctp_abort_an_association(stcb_tmp->sctp_ep, 6378 stcb_tmp, 1, NULL, 0); 6379 goto add_it_now; 6380 } 6381 SCTP_TCB_UNLOCK(stcb_tmp); 6382 } 6383 if (stcb->asoc.state == 0) { 6384 /* the assoc was freed? */ 6385 return (-12); 6386 } 6387 return (-13); 6388 } 6389 } 6390 } else 6391 #endif 6392 #ifdef INET6 6393 if (ptype == SCTP_IPV6_ADDRESS) { 6394 if (stcb->asoc.ipv6_addr_legal) { 6395 /* ok get the v6 address and check/add */ 6396 struct sctp_ipv6addr_param *p6, p6_buf; 6397 6398 phdr = sctp_get_next_param(m, offset, 6399 (struct sctp_paramhdr *)&p6_buf, 6400 sizeof(p6_buf)); 6401 if (plen != sizeof(struct sctp_ipv6addr_param) || 6402 phdr == NULL) { 6403 return (-14); 6404 } 6405 p6 = (struct sctp_ipv6addr_param *)phdr; 6406 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6407 sizeof(p6->addr)); 6408 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6409 /* Skip multi-cast addresses */ 6410 goto next_param; 6411 } 6412 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6413 /* 6414 * Link local make no sense without 6415 * scope 6416 */ 6417 goto next_param; 6418 } 6419 sa = (struct sockaddr *)&sin6; 6420 inp = stcb->sctp_ep; 6421 atomic_add_int(&stcb->asoc.refcnt, 1); 6422 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6423 local_sa, stcb); 6424 atomic_add_int(&stcb->asoc.refcnt, -1); 6425 if (stcb_tmp == NULL && 6426 (inp == stcb->sctp_ep || inp == NULL)) { 6427 /* 6428 * we must validate the state again 6429 * here 6430 */ 6431 add_it_now6: 6432 if (stcb->asoc.state == 0) { 6433 /* the assoc was freed? */ 6434 return (-16); 6435 } 6436 /* 6437 * we must add the address, no scope 6438 * set 6439 */ 6440 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6441 return (-17); 6442 } 6443 } else if (stcb_tmp == stcb) { 6444 /* 6445 * we must validate the state again 6446 * here 6447 */ 6448 if (stcb->asoc.state == 0) { 6449 /* the assoc was freed? */ 6450 return (-19); 6451 } 6452 if (net != NULL) { 6453 /* clear flag */ 6454 net->dest_state &= 6455 ~SCTP_ADDR_NOT_IN_ASSOC; 6456 } 6457 } else { 6458 /* 6459 * strange, address is in another 6460 * assoc? straighten out locks. 6461 */ 6462 if (stcb_tmp) 6463 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6464 /* 6465 * in setup state we 6466 * abort this guy 6467 */ 6468 sctp_abort_an_association(stcb_tmp->sctp_ep, 6469 stcb_tmp, 1, NULL, 0); 6470 goto add_it_now6; 6471 } 6472 SCTP_TCB_UNLOCK(stcb_tmp); 6473 6474 if (stcb->asoc.state == 0) { 6475 /* the assoc was freed? */ 6476 return (-21); 6477 } 6478 return (-22); 6479 } 6480 } 6481 } else 6482 #endif 6483 if (ptype == SCTP_ECN_CAPABLE) { 6484 ecn_allowed = 1; 6485 } else if (ptype == SCTP_ULP_ADAPTATION) { 6486 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6487 struct sctp_adaptation_layer_indication ai, 6488 *aip; 6489 6490 phdr = sctp_get_next_param(m, offset, 6491 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6492 aip = (struct sctp_adaptation_layer_indication *)phdr; 6493 if (aip) { 6494 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6495 stcb->asoc.adaptation_needed = 1; 6496 } 6497 } 6498 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6499 struct sctp_asconf_addr_param lstore, *fee; 6500 int lptype; 6501 struct sockaddr *lsa = NULL; 6502 6503 #ifdef INET 6504 struct sctp_asconf_addrv4_param *fii; 6505 6506 #endif 6507 6508 stcb->asoc.peer_supports_asconf = 1; 6509 if (plen > sizeof(lstore)) { 6510 return (-23); 6511 } 6512 phdr = sctp_get_next_param(m, offset, 6513 (struct sctp_paramhdr *)&lstore, 6514 min(plen, sizeof(lstore))); 6515 if (phdr == NULL) { 6516 return (-24); 6517 } 6518 fee = (struct sctp_asconf_addr_param *)phdr; 6519 lptype = ntohs(fee->addrp.ph.param_type); 6520 switch (lptype) { 6521 #ifdef INET 6522 case SCTP_IPV4_ADDRESS: 6523 if (plen != 6524 sizeof(struct sctp_asconf_addrv4_param)) { 6525 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6526 (int)sizeof(struct sctp_asconf_addrv4_param), 6527 plen); 6528 } else { 6529 fii = (struct sctp_asconf_addrv4_param *)fee; 6530 sin.sin_addr.s_addr = fii->addrp.addr; 6531 lsa = (struct sockaddr *)&sin; 6532 } 6533 break; 6534 #endif 6535 #ifdef INET6 6536 case SCTP_IPV6_ADDRESS: 6537 if (plen != 6538 sizeof(struct sctp_asconf_addr_param)) { 6539 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6540 (int)sizeof(struct sctp_asconf_addr_param), 6541 plen); 6542 } else { 6543 memcpy(sin6.sin6_addr.s6_addr, 6544 fee->addrp.addr, 6545 sizeof(fee->addrp.addr)); 6546 lsa = (struct sockaddr *)&sin6; 6547 } 6548 break; 6549 #endif 6550 default: 6551 break; 6552 } 6553 if (lsa) { 6554 (void)sctp_set_primary_addr(stcb, sa, NULL); 6555 } 6556 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6557 stcb->asoc.peer_supports_nat = 1; 6558 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6559 /* Peer supports pr-sctp */ 6560 stcb->asoc.peer_supports_prsctp = 1; 6561 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6562 /* A supported extension chunk */ 6563 struct sctp_supported_chunk_types_param *pr_supported; 6564 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6565 int num_ent, i; 6566 6567 phdr = sctp_get_next_param(m, offset, 6568 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6569 if (phdr == NULL) { 6570 return (-25); 6571 } 6572 stcb->asoc.peer_supports_asconf = 0; 6573 stcb->asoc.peer_supports_prsctp = 0; 6574 stcb->asoc.peer_supports_pktdrop = 0; 6575 stcb->asoc.peer_supports_strreset = 0; 6576 stcb->asoc.peer_supports_nr_sack = 0; 6577 stcb->asoc.peer_supports_auth = 0; 6578 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6579 num_ent = plen - sizeof(struct sctp_paramhdr); 6580 for (i = 0; i < num_ent; i++) { 6581 switch (pr_supported->chunk_types[i]) { 6582 case SCTP_ASCONF: 6583 case SCTP_ASCONF_ACK: 6584 stcb->asoc.peer_supports_asconf = 1; 6585 break; 6586 case SCTP_FORWARD_CUM_TSN: 6587 stcb->asoc.peer_supports_prsctp = 1; 6588 break; 6589 case SCTP_PACKET_DROPPED: 6590 stcb->asoc.peer_supports_pktdrop = 1; 6591 break; 6592 case SCTP_NR_SELECTIVE_ACK: 6593 stcb->asoc.peer_supports_nr_sack = 1; 6594 break; 6595 case SCTP_STREAM_RESET: 6596 stcb->asoc.peer_supports_strreset = 1; 6597 break; 6598 case SCTP_AUTHENTICATION: 6599 stcb->asoc.peer_supports_auth = 1; 6600 break; 6601 default: 6602 /* one I have not learned yet */ 6603 break; 6604 6605 } 6606 } 6607 } else if (ptype == SCTP_RANDOM) { 6608 if (plen > sizeof(random_store)) 6609 break; 6610 if (got_random) { 6611 /* already processed a RANDOM */ 6612 goto next_param; 6613 } 6614 phdr = sctp_get_next_param(m, offset, 6615 (struct sctp_paramhdr *)random_store, 6616 min(sizeof(random_store), plen)); 6617 if (phdr == NULL) 6618 return (-26); 6619 p_random = (struct sctp_auth_random *)phdr; 6620 random_len = plen - sizeof(*p_random); 6621 /* enforce the random length */ 6622 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6623 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6624 return (-27); 6625 } 6626 got_random = 1; 6627 } else if (ptype == SCTP_HMAC_LIST) { 6628 int num_hmacs; 6629 int i; 6630 6631 if (plen > sizeof(hmacs_store)) 6632 break; 6633 if (got_hmacs) { 6634 /* already processed a HMAC list */ 6635 goto next_param; 6636 } 6637 phdr = sctp_get_next_param(m, offset, 6638 (struct sctp_paramhdr *)hmacs_store, 6639 min(plen, sizeof(hmacs_store))); 6640 if (phdr == NULL) 6641 return (-28); 6642 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6643 hmacs_len = plen - sizeof(*hmacs); 6644 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6645 /* validate the hmac list */ 6646 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6647 return (-29); 6648 } 6649 if (stcb->asoc.peer_hmacs != NULL) 6650 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6651 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6652 if (stcb->asoc.peer_hmacs != NULL) { 6653 for (i = 0; i < num_hmacs; i++) { 6654 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6655 ntohs(hmacs->hmac_ids[i])); 6656 } 6657 } 6658 got_hmacs = 1; 6659 } else if (ptype == SCTP_CHUNK_LIST) { 6660 int i; 6661 6662 if (plen > sizeof(chunks_store)) 6663 break; 6664 if (got_chklist) { 6665 /* already processed a Chunks list */ 6666 goto next_param; 6667 } 6668 phdr = sctp_get_next_param(m, offset, 6669 (struct sctp_paramhdr *)chunks_store, 6670 min(plen, sizeof(chunks_store))); 6671 if (phdr == NULL) 6672 return (-30); 6673 chunks = (struct sctp_auth_chunk_list *)phdr; 6674 num_chunks = plen - sizeof(*chunks); 6675 if (stcb->asoc.peer_auth_chunks != NULL) 6676 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6677 else 6678 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6679 for (i = 0; i < num_chunks; i++) { 6680 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6681 stcb->asoc.peer_auth_chunks); 6682 /* record asconf/asconf-ack if listed */ 6683 if (chunks->chunk_types[i] == SCTP_ASCONF) 6684 saw_asconf = 1; 6685 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6686 saw_asconf_ack = 1; 6687 6688 } 6689 got_chklist = 1; 6690 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6691 (ptype == SCTP_STATE_COOKIE) || 6692 (ptype == SCTP_UNRECOG_PARAM) || 6693 (ptype == SCTP_COOKIE_PRESERVE) || 6694 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6695 (ptype == SCTP_ADD_IP_ADDRESS) || 6696 (ptype == SCTP_DEL_IP_ADDRESS) || 6697 (ptype == SCTP_ERROR_CAUSE_IND) || 6698 (ptype == SCTP_SUCCESS_REPORT)) { 6699 /* don't care */ ; 6700 } else { 6701 if ((ptype & 0x8000) == 0x0000) { 6702 /* 6703 * must stop processing the rest of the 6704 * param's. Any report bits were handled 6705 * with the call to 6706 * sctp_arethere_unrecognized_parameters() 6707 * when the INIT or INIT-ACK was first seen. 6708 */ 6709 break; 6710 } 6711 } 6712 6713 next_param: 6714 offset += SCTP_SIZE32(plen); 6715 if (offset >= limit) { 6716 break; 6717 } 6718 phdr = sctp_get_next_param(m, offset, &parm_buf, 6719 sizeof(parm_buf)); 6720 } 6721 /* Now check to see if we need to purge any addresses */ 6722 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6723 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6724 SCTP_ADDR_NOT_IN_ASSOC) { 6725 /* This address has been removed from the asoc */ 6726 /* remove and free it */ 6727 stcb->asoc.numnets--; 6728 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6729 sctp_free_remote_addr(net); 6730 if (net == stcb->asoc.primary_destination) { 6731 stcb->asoc.primary_destination = NULL; 6732 sctp_select_primary_destination(stcb); 6733 } 6734 } 6735 } 6736 if (ecn_allowed == 0) { 6737 stcb->asoc.ecn_allowed = 0; 6738 } 6739 /* validate authentication required parameters */ 6740 if (got_random && got_hmacs) { 6741 stcb->asoc.peer_supports_auth = 1; 6742 } else { 6743 stcb->asoc.peer_supports_auth = 0; 6744 } 6745 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6746 /* peer does not support auth but sent a chunks list? */ 6747 return (-31); 6748 } 6749 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6750 !stcb->asoc.peer_supports_auth) { 6751 /* peer supports asconf but not auth? */ 6752 return (-32); 6753 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6754 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6755 return (-33); 6756 } 6757 /* concatenate the full random key */ 6758 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6759 if (chunks != NULL) { 6760 keylen += sizeof(*chunks) + num_chunks; 6761 } 6762 new_key = sctp_alloc_key(keylen); 6763 if (new_key != NULL) { 6764 /* copy in the RANDOM */ 6765 if (p_random != NULL) { 6766 keylen = sizeof(*p_random) + random_len; 6767 bcopy(p_random, new_key->key, keylen); 6768 } 6769 /* append in the AUTH chunks */ 6770 if (chunks != NULL) { 6771 bcopy(chunks, new_key->key + keylen, 6772 sizeof(*chunks) + num_chunks); 6773 keylen += sizeof(*chunks) + num_chunks; 6774 } 6775 /* append in the HMACs */ 6776 if (hmacs != NULL) { 6777 bcopy(hmacs, new_key->key + keylen, 6778 sizeof(*hmacs) + hmacs_len); 6779 } 6780 } else { 6781 /* failed to get memory for the key */ 6782 return (-34); 6783 } 6784 if (stcb->asoc.authinfo.peer_random != NULL) 6785 sctp_free_key(stcb->asoc.authinfo.peer_random); 6786 stcb->asoc.authinfo.peer_random = new_key; 6787 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6788 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6789 6790 return (0); 6791 } 6792 6793 int 6794 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6795 struct sctp_nets *net) 6796 { 6797 /* make sure the requested primary address exists in the assoc */ 6798 if (net == NULL && sa) 6799 net = sctp_findnet(stcb, sa); 6800 6801 if (net == NULL) { 6802 /* didn't find the requested primary address! */ 6803 return (-1); 6804 } else { 6805 /* set the primary address */ 6806 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6807 /* Must be confirmed, so queue to set */ 6808 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6809 return (0); 6810 } 6811 stcb->asoc.primary_destination = net; 6812 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6813 sctp_free_remote_addr(stcb->asoc.alternate); 6814 stcb->asoc.alternate = NULL; 6815 } 6816 net = TAILQ_FIRST(&stcb->asoc.nets); 6817 if (net != stcb->asoc.primary_destination) { 6818 /* 6819 * first one on the list is NOT the primary 6820 * sctp_cmpaddr() is much more efficient if the 6821 * primary is the first on the list, make it so. 6822 */ 6823 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6824 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6825 } 6826 return (0); 6827 } 6828 } 6829 6830 int 6831 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6832 { 6833 /* 6834 * This function serves two purposes. It will see if a TAG can be 6835 * re-used and return 1 for yes it is ok and 0 for don't use that 6836 * tag. A secondary function it will do is purge out old tags that 6837 * can be removed. 6838 */ 6839 struct sctpvtaghead *chain; 6840 struct sctp_tagblock *twait_block; 6841 struct sctpasochead *head; 6842 struct sctp_tcb *stcb; 6843 int i; 6844 6845 SCTP_INP_INFO_RLOCK(); 6846 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6847 SCTP_BASE_INFO(hashasocmark))]; 6848 if (head == NULL) { 6849 /* invalid vtag */ 6850 goto skip_vtag_check; 6851 } 6852 LIST_FOREACH(stcb, head, sctp_asocs) { 6853 /* 6854 * We choose not to lock anything here. TCB's can't be 6855 * removed since we have the read lock, so they can't be 6856 * freed on us, same thing for the INP. I may be wrong with 6857 * this assumption, but we will go with it for now :-) 6858 */ 6859 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6860 continue; 6861 } 6862 if (stcb->asoc.my_vtag == tag) { 6863 /* candidate */ 6864 if (stcb->rport != rport) { 6865 continue; 6866 } 6867 if (stcb->sctp_ep->sctp_lport != lport) { 6868 continue; 6869 } 6870 /* Its a used tag set */ 6871 SCTP_INP_INFO_RUNLOCK(); 6872 return (0); 6873 } 6874 } 6875 skip_vtag_check: 6876 6877 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6878 /* Now what about timed wait ? */ 6879 if (!LIST_EMPTY(chain)) { 6880 /* 6881 * Block(s) are present, lets see if we have this tag in the 6882 * list 6883 */ 6884 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6885 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6886 if (twait_block->vtag_block[i].v_tag == 0) { 6887 /* not used */ 6888 continue; 6889 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6890 now->tv_sec) { 6891 /* Audit expires this guy */ 6892 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6893 twait_block->vtag_block[i].v_tag = 0; 6894 twait_block->vtag_block[i].lport = 0; 6895 twait_block->vtag_block[i].rport = 0; 6896 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6897 (twait_block->vtag_block[i].lport == lport) && 6898 (twait_block->vtag_block[i].rport == rport)) { 6899 /* Bad tag, sorry :< */ 6900 SCTP_INP_INFO_RUNLOCK(); 6901 return (0); 6902 } 6903 } 6904 } 6905 } 6906 SCTP_INP_INFO_RUNLOCK(); 6907 return (1); 6908 } 6909 6910 6911 static sctp_assoc_t reneged_asoc_ids[256]; 6912 static uint8_t reneged_at = 0; 6913 6914 6915 static void 6916 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6917 { 6918 /* 6919 * We must hunt this association for MBUF's past the cumack (i.e. 6920 * out of order data that we can renege on). 6921 */ 6922 struct sctp_association *asoc; 6923 struct sctp_tmit_chunk *chk, *nchk; 6924 uint32_t cumulative_tsn_p1; 6925 struct sctp_queued_to_read *ctl, *nctl; 6926 int cnt, strmat; 6927 uint32_t gap, i; 6928 int fnd = 0; 6929 6930 /* We look for anything larger than the cum-ack + 1 */ 6931 6932 asoc = &stcb->asoc; 6933 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6934 /* none we can reneg on. */ 6935 return; 6936 } 6937 SCTP_STAT_INCR(sctps_protocol_drains_done); 6938 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6939 cnt = 0; 6940 /* First look in the re-assembly queue */ 6941 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6942 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6943 /* Yep it is above cum-ack */ 6944 cnt++; 6945 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6946 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6947 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6948 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6949 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6950 if (chk->data) { 6951 sctp_m_freem(chk->data); 6952 chk->data = NULL; 6953 } 6954 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6955 } 6956 } 6957 /* Ok that was fun, now we will drain all the inbound streams? */ 6958 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6959 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6960 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6961 /* Yep it is above cum-ack */ 6962 cnt++; 6963 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6964 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6965 sctp_ucount_decr(asoc->cnt_on_all_streams); 6966 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6967 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6968 if (ctl->data) { 6969 sctp_m_freem(ctl->data); 6970 ctl->data = NULL; 6971 } 6972 sctp_free_remote_addr(ctl->whoFrom); 6973 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6974 SCTP_DECR_READQ_COUNT(); 6975 } 6976 } 6977 } 6978 if (cnt) { 6979 /* We must back down to see what the new highest is */ 6980 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6981 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6982 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6983 asoc->highest_tsn_inside_map = i; 6984 fnd = 1; 6985 break; 6986 } 6987 } 6988 if (!fnd) { 6989 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6990 } 6991 /* 6992 * Question, should we go through the delivery queue? The 6993 * only reason things are on here is the app not reading OR 6994 * a p-d-api up. An attacker COULD send enough in to 6995 * initiate the PD-API and then send a bunch of stuff to 6996 * other streams... these would wind up on the delivery 6997 * queue.. and then we would not get to them. But in order 6998 * to do this I then have to back-track and un-deliver 6999 * sequence numbers in streams.. el-yucko. I think for now 7000 * we will NOT look at the delivery queue and leave it to be 7001 * something to consider later. An alternative would be to 7002 * abort the P-D-API with a notification and then deliver 7003 * the data.... Or another method might be to keep track of 7004 * how many times the situation occurs and if we see a 7005 * possible attack underway just abort the association. 7006 */ 7007 #ifdef SCTP_DEBUG 7008 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 7009 #endif 7010 /* 7011 * Now do we need to find a new 7012 * asoc->highest_tsn_inside_map? 7013 */ 7014 asoc->last_revoke_count = cnt; 7015 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 7016 /* sa_ignore NO_NULL_CHK */ 7017 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 7018 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 7019 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 7020 reneged_at++; 7021 } 7022 /* 7023 * Another issue, in un-setting the TSN's in the mapping array we 7024 * DID NOT adjust the highest_tsn marker. This will cause one of 7025 * two things to occur. It may cause us to do extra work in checking 7026 * for our mapping array movement. More importantly it may cause us 7027 * to SACK every datagram. This may not be a bad thing though since 7028 * we will recover once we get our cum-ack above and all this stuff 7029 * we dumped recovered. 7030 */ 7031 } 7032 7033 void 7034 sctp_drain() 7035 { 7036 /* 7037 * We must walk the PCB lists for ALL associations here. The system 7038 * is LOW on MBUF's and needs help. This is where reneging will 7039 * occur. We really hope this does NOT happen! 7040 */ 7041 VNET_ITERATOR_DECL(vnet_iter); 7042 VNET_LIST_RLOCK_NOSLEEP(); 7043 VNET_FOREACH(vnet_iter) { 7044 CURVNET_SET(vnet_iter); 7045 struct sctp_inpcb *inp; 7046 struct sctp_tcb *stcb; 7047 7048 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7049 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7050 #ifdef VIMAGE 7051 continue; 7052 #else 7053 return; 7054 #endif 7055 } 7056 SCTP_INP_INFO_RLOCK(); 7057 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7058 /* For each endpoint */ 7059 SCTP_INP_RLOCK(inp); 7060 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7061 /* For each association */ 7062 SCTP_TCB_LOCK(stcb); 7063 sctp_drain_mbufs(inp, stcb); 7064 SCTP_TCB_UNLOCK(stcb); 7065 } 7066 SCTP_INP_RUNLOCK(inp); 7067 } 7068 SCTP_INP_INFO_RUNLOCK(); 7069 CURVNET_RESTORE(); 7070 } 7071 VNET_LIST_RUNLOCK_NOSLEEP(); 7072 } 7073 7074 /* 7075 * start a new iterator 7076 * iterates through all endpoints and associations based on the pcb_state 7077 * flags and asoc_state. "af" (mandatory) is executed for all matching 7078 * assocs and "ef" (optional) is executed when the iterator completes. 7079 * "inpf" (optional) is executed for each new endpoint as it is being 7080 * iterated through. inpe (optional) is called when the inp completes 7081 * its way through all the stcbs. 7082 */ 7083 int 7084 sctp_initiate_iterator(inp_func inpf, 7085 asoc_func af, 7086 inp_func inpe, 7087 uint32_t pcb_state, 7088 uint32_t pcb_features, 7089 uint32_t asoc_state, 7090 void *argp, 7091 uint32_t argi, 7092 end_func ef, 7093 struct sctp_inpcb *s_inp, 7094 uint8_t chunk_output_off) 7095 { 7096 struct sctp_iterator *it = NULL; 7097 7098 if (af == NULL) { 7099 return (-1); 7100 } 7101 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7102 SCTP_M_ITER); 7103 if (it == NULL) { 7104 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7105 return (ENOMEM); 7106 } 7107 memset(it, 0, sizeof(*it)); 7108 it->function_assoc = af; 7109 it->function_inp = inpf; 7110 if (inpf) 7111 it->done_current_ep = 0; 7112 else 7113 it->done_current_ep = 1; 7114 it->function_atend = ef; 7115 it->pointer = argp; 7116 it->val = argi; 7117 it->pcb_flags = pcb_state; 7118 it->pcb_features = pcb_features; 7119 it->asoc_state = asoc_state; 7120 it->function_inp_end = inpe; 7121 it->no_chunk_output = chunk_output_off; 7122 it->vn = curvnet; 7123 if (s_inp) { 7124 /* Assume lock is held here */ 7125 it->inp = s_inp; 7126 SCTP_INP_INCR_REF(it->inp); 7127 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7128 } else { 7129 SCTP_INP_INFO_RLOCK(); 7130 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7131 if (it->inp) { 7132 SCTP_INP_INCR_REF(it->inp); 7133 } 7134 SCTP_INP_INFO_RUNLOCK(); 7135 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7136 7137 } 7138 SCTP_IPI_ITERATOR_WQ_LOCK(); 7139 7140 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7141 if (sctp_it_ctl.iterator_running == 0) { 7142 sctp_wakeup_iterator(); 7143 } 7144 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7145 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7146 return (0); 7147 } 7148