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 } 2790 } 2791 /* 2792 * Now any running timers need to be adjusted since we really don't 2793 * care if they are running or not just blast in the new_inp into 2794 * all of them. 2795 */ 2796 2797 stcb->asoc.dack_timer.ep = (void *)new_inp; 2798 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2799 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2800 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2801 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2802 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2803 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2804 /* now what about the nets? */ 2805 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2806 net->pmtu_timer.ep = (void *)new_inp; 2807 net->rxt_timer.ep = (void *)new_inp; 2808 } 2809 SCTP_INP_WUNLOCK(new_inp); 2810 SCTP_INP_WUNLOCK(old_inp); 2811 } 2812 2813 2814 2815 2816 /* sctp_ifap is used to bypass normal local address validation checks */ 2817 int 2818 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2819 struct sctp_ifa *sctp_ifap, struct thread *p) 2820 { 2821 /* bind a ep to a socket address */ 2822 struct sctppcbhead *head; 2823 struct sctp_inpcb *inp, *inp_tmp; 2824 struct inpcb *ip_inp; 2825 int port_reuse_active = 0; 2826 int bindall; 2827 uint16_t lport; 2828 int error; 2829 uint32_t vrf_id; 2830 2831 lport = 0; 2832 error = 0; 2833 bindall = 1; 2834 inp = (struct sctp_inpcb *)so->so_pcb; 2835 ip_inp = (struct inpcb *)so->so_pcb; 2836 #ifdef SCTP_DEBUG 2837 if (addr) { 2838 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2839 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2840 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2841 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2842 } 2843 #endif 2844 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2845 /* already did a bind, subsequent binds NOT allowed ! */ 2846 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2847 return (EINVAL); 2848 } 2849 #ifdef INVARIANTS 2850 if (p == NULL) 2851 panic("null proc/thread"); 2852 #endif 2853 if (addr != NULL) { 2854 switch (addr->sa_family) { 2855 #ifdef INET 2856 case AF_INET: 2857 { 2858 struct sockaddr_in *sin; 2859 2860 /* IPV6_V6ONLY socket? */ 2861 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2862 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2863 return (EINVAL); 2864 } 2865 if (addr->sa_len != sizeof(*sin)) { 2866 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2867 return (EINVAL); 2868 } 2869 sin = (struct sockaddr_in *)addr; 2870 lport = sin->sin_port; 2871 /* 2872 * For LOOPBACK the prison_local_ip4() call 2873 * will transmute the ip address to the 2874 * proper value. 2875 */ 2876 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2877 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2878 return (error); 2879 } 2880 if (sin->sin_addr.s_addr != INADDR_ANY) { 2881 bindall = 0; 2882 } 2883 break; 2884 } 2885 #endif 2886 #ifdef INET6 2887 case AF_INET6: 2888 { 2889 /* 2890 * Only for pure IPv6 Address. (No IPv4 2891 * Mapped!) 2892 */ 2893 struct sockaddr_in6 *sin6; 2894 2895 sin6 = (struct sockaddr_in6 *)addr; 2896 2897 if (addr->sa_len != sizeof(*sin6)) { 2898 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2899 return (EINVAL); 2900 } 2901 lport = sin6->sin6_port; 2902 2903 /* 2904 * For LOOPBACK the prison_local_ip6() call 2905 * will transmute the ipv6 address to the 2906 * proper value. 2907 */ 2908 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2909 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2910 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2911 return (error); 2912 } 2913 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2914 bindall = 0; 2915 /* KAME hack: embed scopeid */ 2916 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2917 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2918 return (EINVAL); 2919 } 2920 } 2921 /* this must be cleared for ifa_ifwithaddr() */ 2922 sin6->sin6_scope_id = 0; 2923 break; 2924 } 2925 #endif 2926 default: 2927 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2928 return (EAFNOSUPPORT); 2929 } 2930 } 2931 SCTP_INP_INFO_WLOCK(); 2932 SCTP_INP_WLOCK(inp); 2933 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2934 vrf_id = inp->def_vrf_id; 2935 2936 /* increase our count due to the unlock we do */ 2937 SCTP_INP_INCR_REF(inp); 2938 if (lport) { 2939 /* 2940 * Did the caller specify a port? if so we must see if a ep 2941 * already has this one bound. 2942 */ 2943 /* got to be root to get at low ports */ 2944 if (ntohs(lport) < IPPORT_RESERVED) { 2945 if (p && (error = 2946 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2947 )) { 2948 SCTP_INP_DECR_REF(inp); 2949 SCTP_INP_WUNLOCK(inp); 2950 SCTP_INP_INFO_WUNLOCK(); 2951 return (error); 2952 } 2953 } 2954 if (p == NULL) { 2955 SCTP_INP_DECR_REF(inp); 2956 SCTP_INP_WUNLOCK(inp); 2957 SCTP_INP_INFO_WUNLOCK(); 2958 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2959 return (error); 2960 } 2961 SCTP_INP_WUNLOCK(inp); 2962 if (bindall) { 2963 vrf_id = inp->def_vrf_id; 2964 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2965 if (inp_tmp != NULL) { 2966 /* 2967 * lock guy returned and lower count note 2968 * that we are not bound so inp_tmp should 2969 * NEVER be inp. And it is this inp 2970 * (inp_tmp) that gets the reference bump, 2971 * so we must lower it. 2972 */ 2973 SCTP_INP_DECR_REF(inp_tmp); 2974 /* unlock info */ 2975 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2976 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2977 /* 2978 * Ok, must be one-2-one and 2979 * allowing port re-use 2980 */ 2981 port_reuse_active = 1; 2982 goto continue_anyway; 2983 } 2984 SCTP_INP_DECR_REF(inp); 2985 SCTP_INP_INFO_WUNLOCK(); 2986 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2987 return (EADDRINUSE); 2988 } 2989 } else { 2990 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2991 if (inp_tmp != NULL) { 2992 /* 2993 * lock guy returned and lower count note 2994 * that we are not bound so inp_tmp should 2995 * NEVER be inp. And it is this inp 2996 * (inp_tmp) that gets the reference bump, 2997 * so we must lower it. 2998 */ 2999 SCTP_INP_DECR_REF(inp_tmp); 3000 /* unlock info */ 3001 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3002 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3003 /* 3004 * Ok, must be one-2-one and 3005 * allowing port re-use 3006 */ 3007 port_reuse_active = 1; 3008 goto continue_anyway; 3009 } 3010 SCTP_INP_DECR_REF(inp); 3011 SCTP_INP_INFO_WUNLOCK(); 3012 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3013 return (EADDRINUSE); 3014 } 3015 } 3016 continue_anyway: 3017 SCTP_INP_WLOCK(inp); 3018 if (bindall) { 3019 /* verify that no lport is not used by a singleton */ 3020 if ((port_reuse_active == 0) && 3021 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 3022 ) { 3023 /* Sorry someone already has this one bound */ 3024 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3025 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3026 port_reuse_active = 1; 3027 } else { 3028 SCTP_INP_DECR_REF(inp); 3029 SCTP_INP_WUNLOCK(inp); 3030 SCTP_INP_INFO_WUNLOCK(); 3031 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3032 return (EADDRINUSE); 3033 } 3034 } 3035 } 3036 } else { 3037 uint16_t first, last, candidate; 3038 uint16_t count; 3039 int done; 3040 3041 if (ip_inp->inp_flags & INP_HIGHPORT) { 3042 first = MODULE_GLOBAL(ipport_hifirstauto); 3043 last = MODULE_GLOBAL(ipport_hilastauto); 3044 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3045 if (p && (error = 3046 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3047 )) { 3048 SCTP_INP_DECR_REF(inp); 3049 SCTP_INP_WUNLOCK(inp); 3050 SCTP_INP_INFO_WUNLOCK(); 3051 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3052 return (error); 3053 } 3054 first = MODULE_GLOBAL(ipport_lowfirstauto); 3055 last = MODULE_GLOBAL(ipport_lowlastauto); 3056 } else { 3057 first = MODULE_GLOBAL(ipport_firstauto); 3058 last = MODULE_GLOBAL(ipport_lastauto); 3059 } 3060 if (first > last) { 3061 uint16_t temp; 3062 3063 temp = first; 3064 first = last; 3065 last = temp; 3066 } 3067 count = last - first + 1; /* number of candidates */ 3068 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3069 3070 done = 0; 3071 while (!done) { 3072 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3073 done = 1; 3074 } 3075 if (!done) { 3076 if (--count == 0) { 3077 SCTP_INP_DECR_REF(inp); 3078 SCTP_INP_WUNLOCK(inp); 3079 SCTP_INP_INFO_WUNLOCK(); 3080 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3081 return (EADDRINUSE); 3082 } 3083 if (candidate == last) 3084 candidate = first; 3085 else 3086 candidate = candidate + 1; 3087 } 3088 } 3089 lport = htons(candidate); 3090 } 3091 SCTP_INP_DECR_REF(inp); 3092 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3093 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3094 /* 3095 * this really should not happen. The guy did a non-blocking 3096 * bind and then did a close at the same time. 3097 */ 3098 SCTP_INP_WUNLOCK(inp); 3099 SCTP_INP_INFO_WUNLOCK(); 3100 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3101 return (EINVAL); 3102 } 3103 /* ok we look clear to give out this port, so lets setup the binding */ 3104 if (bindall) { 3105 /* binding to all addresses, so just set in the proper flags */ 3106 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3107 /* set the automatic addr changes from kernel flag */ 3108 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3109 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3110 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3111 } else { 3112 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3113 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3114 } 3115 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3116 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3117 } else { 3118 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3119 } 3120 /* 3121 * set the automatic mobility_base from kernel flag (by 3122 * micchie) 3123 */ 3124 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3125 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3126 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3127 } else { 3128 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3129 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3130 } 3131 /* 3132 * set the automatic mobility_fasthandoff from kernel flag 3133 * (by micchie) 3134 */ 3135 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3136 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3137 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3138 } else { 3139 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3140 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3141 } 3142 } else { 3143 /* 3144 * bind specific, make sure flags is off and add a new 3145 * address structure to the sctp_addr_list inside the ep 3146 * structure. 3147 * 3148 * We will need to allocate one and insert it at the head. The 3149 * socketopt call can just insert new addresses in there as 3150 * well. It will also have to do the embed scope kame hack 3151 * too (before adding). 3152 */ 3153 struct sctp_ifa *ifa; 3154 struct sockaddr_storage store_sa; 3155 3156 memset(&store_sa, 0, sizeof(store_sa)); 3157 switch (addr->sa_family) { 3158 case AF_INET: 3159 { 3160 struct sockaddr_in *sin; 3161 3162 sin = (struct sockaddr_in *)&store_sa; 3163 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3164 sin->sin_port = 0; 3165 break; 3166 } 3167 case AF_INET6: 3168 { 3169 struct sockaddr_in6 *sin6; 3170 3171 sin6 = (struct sockaddr_in6 *)&store_sa; 3172 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3173 sin6->sin6_port = 0; 3174 break; 3175 } 3176 default: 3177 break; 3178 } 3179 /* 3180 * first find the interface with the bound address need to 3181 * zero out the port to find the address! yuck! can't do 3182 * this earlier since need port for sctp_pcb_findep() 3183 */ 3184 if (sctp_ifap != NULL) 3185 ifa = sctp_ifap; 3186 else { 3187 /* 3188 * Note for BSD we hit here always other O/S's will 3189 * pass things in via the sctp_ifap argument 3190 * (Panda). 3191 */ 3192 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3193 vrf_id, SCTP_ADDR_NOT_LOCKED); 3194 } 3195 if (ifa == NULL) { 3196 /* Can't find an interface with that address */ 3197 SCTP_INP_WUNLOCK(inp); 3198 SCTP_INP_INFO_WUNLOCK(); 3199 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3200 return (EADDRNOTAVAIL); 3201 } 3202 #ifdef INET6 3203 if (addr->sa_family == AF_INET6) { 3204 /* GAK, more FIXME IFA lock? */ 3205 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3206 /* Can't bind a non-existent addr. */ 3207 SCTP_INP_WUNLOCK(inp); 3208 SCTP_INP_INFO_WUNLOCK(); 3209 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3210 return (EINVAL); 3211 } 3212 } 3213 #endif 3214 /* we're not bound all */ 3215 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3216 /* allow bindx() to send ASCONF's for binding changes */ 3217 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3218 /* clear automatic addr changes from kernel flag */ 3219 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3220 3221 /* add this address to the endpoint list */ 3222 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3223 if (error != 0) { 3224 SCTP_INP_WUNLOCK(inp); 3225 SCTP_INP_INFO_WUNLOCK(); 3226 return (error); 3227 } 3228 inp->laddr_count++; 3229 } 3230 /* find the bucket */ 3231 if (port_reuse_active) { 3232 /* Put it into tcp 1-2-1 hash */ 3233 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3234 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3235 } else { 3236 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3237 } 3238 /* put it in the bucket */ 3239 LIST_INSERT_HEAD(head, inp, sctp_hash); 3240 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3241 head, ntohs(lport), port_reuse_active); 3242 /* set in the port */ 3243 inp->sctp_lport = lport; 3244 3245 /* turn off just the unbound flag */ 3246 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3247 SCTP_INP_WUNLOCK(inp); 3248 SCTP_INP_INFO_WUNLOCK(); 3249 return (0); 3250 } 3251 3252 3253 static void 3254 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3255 { 3256 struct sctp_iterator *it, *nit; 3257 3258 /* 3259 * We enter with the only the ITERATOR_LOCK in place and a write 3260 * lock on the inp_info stuff. 3261 */ 3262 it = sctp_it_ctl.cur_it; 3263 if (it && (it->vn != curvnet)) { 3264 /* Its not looking at our VNET */ 3265 return; 3266 } 3267 if (it && (it->inp == inp)) { 3268 /* 3269 * This is tricky and we hold the iterator lock, but when it 3270 * returns and gets the lock (when we release it) the 3271 * iterator will try to operate on inp. We need to stop that 3272 * from happening. But of course the iterator has a 3273 * reference on the stcb and inp. We can mark it and it will 3274 * stop. 3275 * 3276 * If its a single iterator situation, we set the end iterator 3277 * flag. Otherwise we set the iterator to go to the next 3278 * inp. 3279 * 3280 */ 3281 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3282 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3283 } else { 3284 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3285 } 3286 } 3287 /* 3288 * Now go through and remove any single reference to our inp that 3289 * may be still pending on the list 3290 */ 3291 SCTP_IPI_ITERATOR_WQ_LOCK(); 3292 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3293 if (it->vn != curvnet) { 3294 continue; 3295 } 3296 if (it->inp == inp) { 3297 /* This one points to me is it inp specific? */ 3298 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3299 /* Remove and free this one */ 3300 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3301 it, sctp_nxt_itr); 3302 if (it->function_atend != NULL) { 3303 (*it->function_atend) (it->pointer, it->val); 3304 } 3305 SCTP_FREE(it, SCTP_M_ITER); 3306 } else { 3307 it->inp = LIST_NEXT(it->inp, sctp_list); 3308 if (it->inp) { 3309 SCTP_INP_INCR_REF(it->inp); 3310 } 3311 } 3312 /* 3313 * When its put in the refcnt is incremented so decr 3314 * it 3315 */ 3316 SCTP_INP_DECR_REF(inp); 3317 } 3318 } 3319 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3320 } 3321 3322 /* release sctp_inpcb unbind the port */ 3323 void 3324 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3325 { 3326 /* 3327 * Here we free a endpoint. We must find it (if it is in the Hash 3328 * table) and remove it from there. Then we must also find it in the 3329 * overall list and remove it from there. After all removals are 3330 * complete then any timer has to be stopped. Then start the actual 3331 * freeing. a) Any local lists. b) Any associations. c) The hash of 3332 * all associations. d) finally the ep itself. 3333 */ 3334 struct sctp_pcb *m; 3335 struct sctp_tcb *asoc, *nasoc; 3336 struct sctp_laddr *laddr, *nladdr; 3337 struct inpcb *ip_pcb; 3338 struct socket *so; 3339 int being_refed = 0; 3340 struct sctp_queued_to_read *sq, *nsq; 3341 int cnt; 3342 sctp_sharedkey_t *shared_key, *nshared_key; 3343 3344 3345 #ifdef SCTP_LOG_CLOSING 3346 sctp_log_closing(inp, NULL, 0); 3347 #endif 3348 SCTP_ITERATOR_LOCK(); 3349 /* mark any iterators on the list or being processed */ 3350 sctp_iterator_inp_being_freed(inp); 3351 SCTP_ITERATOR_UNLOCK(); 3352 so = inp->sctp_socket; 3353 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3354 /* been here before.. eeks.. get out of here */ 3355 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3356 #ifdef SCTP_LOG_CLOSING 3357 sctp_log_closing(inp, NULL, 1); 3358 #endif 3359 return; 3360 } 3361 SCTP_ASOC_CREATE_LOCK(inp); 3362 SCTP_INP_INFO_WLOCK(); 3363 3364 SCTP_INP_WLOCK(inp); 3365 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3366 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3367 /* socket is gone, so no more wakeups allowed */ 3368 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3369 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3370 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3371 3372 } 3373 /* First time through we have the socket lock, after that no more. */ 3374 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3375 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3376 3377 if (inp->control) { 3378 sctp_m_freem(inp->control); 3379 inp->control = NULL; 3380 } 3381 if (inp->pkt) { 3382 sctp_m_freem(inp->pkt); 3383 inp->pkt = NULL; 3384 } 3385 m = &inp->sctp_ep; 3386 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3387 * here but I will be nice :> (i.e. 3388 * ip_pcb = ep;) */ 3389 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3390 int cnt_in_sd; 3391 3392 cnt_in_sd = 0; 3393 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3394 SCTP_TCB_LOCK(asoc); 3395 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3396 /* Skip guys being freed */ 3397 cnt_in_sd++; 3398 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3399 /* 3400 * Special case - we did not start a 3401 * kill timer on the asoc due to it 3402 * was not closed. So go ahead and 3403 * start it now. 3404 */ 3405 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3406 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3407 } 3408 SCTP_TCB_UNLOCK(asoc); 3409 continue; 3410 } 3411 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3412 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3413 (asoc->asoc.total_output_queue_size == 0)) { 3414 /* 3415 * If we have data in queue, we don't want 3416 * to just free since the app may have done, 3417 * send()/close or connect/send/close. And 3418 * it wants the data to get across first. 3419 */ 3420 /* Just abandon things in the front states */ 3421 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3422 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3423 cnt_in_sd++; 3424 } 3425 continue; 3426 } 3427 /* Disconnect the socket please */ 3428 asoc->sctp_socket = NULL; 3429 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3430 if ((asoc->asoc.size_on_reasm_queue > 0) || 3431 (asoc->asoc.control_pdapi) || 3432 (asoc->asoc.size_on_all_streams > 0) || 3433 (so && (so->so_rcv.sb_cc > 0)) 3434 ) { 3435 /* Left with Data unread */ 3436 struct mbuf *op_err; 3437 3438 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3439 0, M_DONTWAIT, 1, MT_DATA); 3440 if (op_err) { 3441 /* Fill in the user initiated abort */ 3442 struct sctp_paramhdr *ph; 3443 uint32_t *ippp; 3444 3445 SCTP_BUF_LEN(op_err) = 3446 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3447 ph = mtod(op_err, 3448 struct sctp_paramhdr *); 3449 ph->param_type = htons( 3450 SCTP_CAUSE_USER_INITIATED_ABT); 3451 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3452 ippp = (uint32_t *) (ph + 1); 3453 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3454 } 3455 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3456 #if defined(SCTP_PANIC_ON_ABORT) 3457 panic("inpcb_free does an abort"); 3458 #endif 3459 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3460 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3461 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3462 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3463 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3464 } 3465 if (sctp_free_assoc(inp, asoc, 3466 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3467 cnt_in_sd++; 3468 } 3469 continue; 3470 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3471 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3472 (asoc->asoc.stream_queue_cnt == 0) 3473 ) { 3474 if (asoc->asoc.locked_on_sending) { 3475 goto abort_anyway; 3476 } 3477 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3478 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3479 struct sctp_nets *netp; 3480 3481 if (asoc->asoc.alternate) { 3482 netp = asoc->asoc.alternate; 3483 } else { 3484 netp = asoc->asoc.primary_destination; 3485 } 3486 /* 3487 * there is nothing queued to send, 3488 * so I send shutdown 3489 */ 3490 sctp_send_shutdown(asoc, netp); 3491 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3492 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3493 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3494 } 3495 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3496 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3497 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3498 netp); 3499 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3500 asoc->asoc.primary_destination); 3501 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3502 } 3503 } else { 3504 /* mark into shutdown pending */ 3505 struct sctp_stream_queue_pending *sp; 3506 3507 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3508 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3509 asoc->asoc.primary_destination); 3510 if (asoc->asoc.locked_on_sending) { 3511 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3512 sctp_streamhead); 3513 if (sp == NULL) { 3514 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3515 asoc->asoc.locked_on_sending, 3516 asoc->asoc.locked_on_sending->stream_no); 3517 } else { 3518 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3519 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3520 } 3521 } 3522 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3523 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3524 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3525 struct mbuf *op_err; 3526 3527 abort_anyway: 3528 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3529 0, M_DONTWAIT, 1, MT_DATA); 3530 if (op_err) { 3531 /* 3532 * Fill in the user 3533 * initiated abort 3534 */ 3535 struct sctp_paramhdr *ph; 3536 uint32_t *ippp; 3537 3538 SCTP_BUF_LEN(op_err) = 3539 (sizeof(struct sctp_paramhdr) + 3540 sizeof(uint32_t)); 3541 ph = mtod(op_err, 3542 struct sctp_paramhdr *); 3543 ph->param_type = htons( 3544 SCTP_CAUSE_USER_INITIATED_ABT); 3545 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3546 ippp = (uint32_t *) (ph + 1); 3547 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3548 } 3549 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3550 #if defined(SCTP_PANIC_ON_ABORT) 3551 panic("inpcb_free does an abort"); 3552 #endif 3553 3554 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3555 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3556 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3557 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3558 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3559 } 3560 if (sctp_free_assoc(inp, asoc, 3561 SCTP_PCBFREE_NOFORCE, 3562 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3563 cnt_in_sd++; 3564 } 3565 continue; 3566 } else { 3567 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3568 } 3569 } 3570 cnt_in_sd++; 3571 SCTP_TCB_UNLOCK(asoc); 3572 } 3573 /* now is there some left in our SHUTDOWN state? */ 3574 if (cnt_in_sd) { 3575 #ifdef SCTP_LOG_CLOSING 3576 sctp_log_closing(inp, NULL, 2); 3577 #endif 3578 inp->sctp_socket = NULL; 3579 SCTP_INP_WUNLOCK(inp); 3580 SCTP_ASOC_CREATE_UNLOCK(inp); 3581 SCTP_INP_INFO_WUNLOCK(); 3582 return; 3583 } 3584 } 3585 inp->sctp_socket = NULL; 3586 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3587 SCTP_PCB_FLAGS_UNBOUND) { 3588 /* 3589 * ok, this guy has been bound. It's port is somewhere in 3590 * the SCTP_BASE_INFO(hash table). Remove it! 3591 */ 3592 LIST_REMOVE(inp, sctp_hash); 3593 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3594 } 3595 /* 3596 * If there is a timer running to kill us, forget it, since it may 3597 * have a contest on the INP lock.. which would cause us to die ... 3598 */ 3599 cnt = 0; 3600 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3601 SCTP_TCB_LOCK(asoc); 3602 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3603 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3604 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3605 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3606 } 3607 cnt++; 3608 SCTP_TCB_UNLOCK(asoc); 3609 continue; 3610 } 3611 /* Free associations that are NOT killing us */ 3612 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3613 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3614 struct mbuf *op_err; 3615 uint32_t *ippp; 3616 3617 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3618 0, M_DONTWAIT, 1, MT_DATA); 3619 if (op_err) { 3620 /* Fill in the user initiated abort */ 3621 struct sctp_paramhdr *ph; 3622 3623 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3624 sizeof(uint32_t)); 3625 ph = mtod(op_err, struct sctp_paramhdr *); 3626 ph->param_type = htons( 3627 SCTP_CAUSE_USER_INITIATED_ABT); 3628 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3629 ippp = (uint32_t *) (ph + 1); 3630 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3631 3632 } 3633 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3634 #if defined(SCTP_PANIC_ON_ABORT) 3635 panic("inpcb_free does an abort"); 3636 #endif 3637 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3638 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3639 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3640 cnt++; 3641 SCTP_TCB_UNLOCK(asoc); 3642 continue; 3643 } 3644 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3645 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3646 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3647 } 3648 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3649 cnt++; 3650 } 3651 } 3652 if (cnt) { 3653 /* Ok we have someone out there that will kill us */ 3654 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3655 #ifdef SCTP_LOG_CLOSING 3656 sctp_log_closing(inp, NULL, 3); 3657 #endif 3658 SCTP_INP_WUNLOCK(inp); 3659 SCTP_ASOC_CREATE_UNLOCK(inp); 3660 SCTP_INP_INFO_WUNLOCK(); 3661 return; 3662 } 3663 if (SCTP_INP_LOCK_CONTENDED(inp)) 3664 being_refed++; 3665 if (SCTP_INP_READ_CONTENDED(inp)) 3666 being_refed++; 3667 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3668 being_refed++; 3669 3670 if ((inp->refcount) || 3671 (being_refed) || 3672 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3673 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3674 #ifdef SCTP_LOG_CLOSING 3675 sctp_log_closing(inp, NULL, 4); 3676 #endif 3677 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3678 SCTP_INP_WUNLOCK(inp); 3679 SCTP_ASOC_CREATE_UNLOCK(inp); 3680 SCTP_INP_INFO_WUNLOCK(); 3681 return; 3682 } 3683 inp->sctp_ep.signature_change.type = 0; 3684 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3685 /* 3686 * Remove it from the list .. last thing we need a lock for. 3687 */ 3688 LIST_REMOVE(inp, sctp_list); 3689 SCTP_INP_WUNLOCK(inp); 3690 SCTP_ASOC_CREATE_UNLOCK(inp); 3691 SCTP_INP_INFO_WUNLOCK(); 3692 /* 3693 * Now we release all locks. Since this INP cannot be found anymore 3694 * except possibly by the kill timer that might be running. We call 3695 * the drain function here. It should hit the case were it sees the 3696 * ACTIVE flag cleared and exit out freeing us to proceed and 3697 * destroy everything. 3698 */ 3699 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3700 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3701 } else { 3702 /* Probably un-needed */ 3703 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3704 } 3705 3706 #ifdef SCTP_LOG_CLOSING 3707 sctp_log_closing(inp, NULL, 5); 3708 #endif 3709 3710 3711 if ((inp->sctp_asocidhash) != NULL) { 3712 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3713 inp->sctp_asocidhash = NULL; 3714 } 3715 /* sa_ignore FREED_MEMORY */ 3716 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3717 /* Its only abandoned if it had data left */ 3718 if (sq->length) 3719 SCTP_STAT_INCR(sctps_left_abandon); 3720 3721 TAILQ_REMOVE(&inp->read_queue, sq, next); 3722 sctp_free_remote_addr(sq->whoFrom); 3723 if (so) 3724 so->so_rcv.sb_cc -= sq->length; 3725 if (sq->data) { 3726 sctp_m_freem(sq->data); 3727 sq->data = NULL; 3728 } 3729 /* 3730 * no need to free the net count, since at this point all 3731 * assoc's are gone. 3732 */ 3733 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3734 SCTP_DECR_READQ_COUNT(); 3735 } 3736 /* Now the sctp_pcb things */ 3737 /* 3738 * free each asoc if it is not already closed/free. we can't use the 3739 * macro here since le_next will get freed as part of the 3740 * sctp_free_assoc() call. 3741 */ 3742 cnt = 0; 3743 if (so) { 3744 #ifdef IPSEC 3745 ipsec_delete_pcbpolicy(ip_pcb); 3746 #endif /* IPSEC */ 3747 3748 /* Unlocks not needed since the socket is gone now */ 3749 } 3750 if (ip_pcb->inp_options) { 3751 (void)sctp_m_free(ip_pcb->inp_options); 3752 ip_pcb->inp_options = 0; 3753 } 3754 #ifdef INET6 3755 if (ip_pcb->inp_vflag & INP_IPV6) { 3756 struct in6pcb *in6p; 3757 3758 in6p = (struct in6pcb *)inp; 3759 ip6_freepcbopts(in6p->in6p_outputopts); 3760 } 3761 #endif /* INET6 */ 3762 ip_pcb->inp_vflag = 0; 3763 /* free up authentication fields */ 3764 if (inp->sctp_ep.local_auth_chunks != NULL) 3765 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3766 if (inp->sctp_ep.local_hmacs != NULL) 3767 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3768 3769 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3770 LIST_REMOVE(shared_key, next); 3771 sctp_free_sharedkey(shared_key); 3772 /* sa_ignore FREED_MEMORY */ 3773 } 3774 3775 /* 3776 * if we have an address list the following will free the list of 3777 * ifaddr's that are set into this ep. Again macro limitations here, 3778 * since the LIST_FOREACH could be a bad idea. 3779 */ 3780 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3781 sctp_remove_laddr(laddr); 3782 } 3783 3784 #ifdef SCTP_TRACK_FREED_ASOCS 3785 /* TEMP CODE */ 3786 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3787 LIST_REMOVE(asoc, sctp_tcblist); 3788 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3789 SCTP_DECR_ASOC_COUNT(); 3790 } 3791 /* *** END TEMP CODE *** */ 3792 #endif 3793 /* Now lets see about freeing the EP hash table. */ 3794 if (inp->sctp_tcbhash != NULL) { 3795 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3796 inp->sctp_tcbhash = NULL; 3797 } 3798 /* Now we must put the ep memory back into the zone pool */ 3799 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3800 SCTP_INP_LOCK_DESTROY(inp); 3801 SCTP_INP_READ_DESTROY(inp); 3802 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3803 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3804 SCTP_DECR_EP_COUNT(); 3805 } 3806 3807 3808 struct sctp_nets * 3809 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3810 { 3811 struct sctp_nets *net; 3812 3813 /* locate the address */ 3814 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3815 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3816 return (net); 3817 } 3818 return (NULL); 3819 } 3820 3821 3822 int 3823 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3824 { 3825 struct sctp_ifa *sctp_ifa; 3826 3827 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3828 if (sctp_ifa) { 3829 return (1); 3830 } else { 3831 return (0); 3832 } 3833 } 3834 3835 /* 3836 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3837 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3838 * stats of stuff. 3839 */ 3840 int 3841 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3842 struct sctp_nets **netp, int set_scope, int from) 3843 { 3844 /* 3845 * The following is redundant to the same lines in the 3846 * sctp_aloc_assoc() but is needed since others call the add address 3847 * function 3848 */ 3849 struct sctp_nets *net, *netfirst; 3850 int addr_inscope; 3851 3852 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3853 from); 3854 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3855 3856 netfirst = sctp_findnet(stcb, newaddr); 3857 if (netfirst) { 3858 /* 3859 * Lie and return ok, we don't want to make the association 3860 * go away for this behavior. It will happen in the TCP 3861 * model in a connected socket. It does not reach the hash 3862 * table until after the association is built so it can't be 3863 * found. Mark as reachable, since the initial creation will 3864 * have been cleared and the NOT_IN_ASSOC flag will have 3865 * been added... and we don't want to end up removing it 3866 * back out. 3867 */ 3868 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3869 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3870 SCTP_ADDR_UNCONFIRMED); 3871 } else { 3872 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3873 } 3874 3875 return (0); 3876 } 3877 addr_inscope = 1; 3878 switch (newaddr->sa_family) { 3879 #ifdef INET 3880 case AF_INET: 3881 { 3882 struct sockaddr_in *sin; 3883 3884 sin = (struct sockaddr_in *)newaddr; 3885 if (sin->sin_addr.s_addr == 0) { 3886 /* Invalid address */ 3887 return (-1); 3888 } 3889 /* zero out the bzero area */ 3890 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3891 3892 /* assure len is set */ 3893 sin->sin_len = sizeof(struct sockaddr_in); 3894 if (set_scope) { 3895 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3896 stcb->ipv4_local_scope = 1; 3897 #else 3898 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3899 stcb->asoc.ipv4_local_scope = 1; 3900 } 3901 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3902 } else { 3903 /* Validate the address is in scope */ 3904 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3905 (stcb->asoc.ipv4_local_scope == 0)) { 3906 addr_inscope = 0; 3907 } 3908 } 3909 break; 3910 } 3911 #endif 3912 #ifdef INET6 3913 case AF_INET6: 3914 { 3915 struct sockaddr_in6 *sin6; 3916 3917 sin6 = (struct sockaddr_in6 *)newaddr; 3918 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3919 /* Invalid address */ 3920 return (-1); 3921 } 3922 /* assure len is set */ 3923 sin6->sin6_len = sizeof(struct sockaddr_in6); 3924 if (set_scope) { 3925 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3926 stcb->asoc.loopback_scope = 1; 3927 stcb->asoc.local_scope = 0; 3928 stcb->asoc.ipv4_local_scope = 1; 3929 stcb->asoc.site_scope = 1; 3930 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3931 /* 3932 * If the new destination is a 3933 * LINK_LOCAL we must have common 3934 * site scope. Don't set the local 3935 * scope since we may not share all 3936 * links, only loopback can do this. 3937 * Links on the local network would 3938 * also be on our private network 3939 * for v4 too. 3940 */ 3941 stcb->asoc.ipv4_local_scope = 1; 3942 stcb->asoc.site_scope = 1; 3943 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3944 /* 3945 * If the new destination is 3946 * SITE_LOCAL then we must have site 3947 * scope in common. 3948 */ 3949 stcb->asoc.site_scope = 1; 3950 } 3951 } else { 3952 /* Validate the address is in scope */ 3953 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3954 (stcb->asoc.loopback_scope == 0)) { 3955 addr_inscope = 0; 3956 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3957 (stcb->asoc.local_scope == 0)) { 3958 addr_inscope = 0; 3959 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3960 (stcb->asoc.site_scope == 0)) { 3961 addr_inscope = 0; 3962 } 3963 } 3964 break; 3965 } 3966 #endif 3967 default: 3968 /* not supported family type */ 3969 return (-1); 3970 } 3971 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3972 if (net == NULL) { 3973 return (-1); 3974 } 3975 SCTP_INCR_RADDR_COUNT(); 3976 bzero(net, sizeof(struct sctp_nets)); 3977 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3978 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3979 switch (newaddr->sa_family) { 3980 #ifdef INET 3981 case AF_INET: 3982 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3983 break; 3984 #endif 3985 #ifdef INET6 3986 case AF_INET6: 3987 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3988 break; 3989 #endif 3990 default: 3991 break; 3992 } 3993 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3994 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3995 stcb->asoc.loopback_scope = 1; 3996 stcb->asoc.ipv4_local_scope = 1; 3997 stcb->asoc.local_scope = 0; 3998 stcb->asoc.site_scope = 1; 3999 addr_inscope = 1; 4000 } 4001 net->failure_threshold = stcb->asoc.def_net_failure; 4002 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 4003 if (addr_inscope == 0) { 4004 net->dest_state = (SCTP_ADDR_REACHABLE | 4005 SCTP_ADDR_OUT_OF_SCOPE); 4006 } else { 4007 if (from == SCTP_ADDR_IS_CONFIRMED) 4008 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 4009 net->dest_state = SCTP_ADDR_REACHABLE; 4010 else 4011 net->dest_state = SCTP_ADDR_REACHABLE | 4012 SCTP_ADDR_UNCONFIRMED; 4013 } 4014 /* 4015 * We set this to 0, the timer code knows that this means its an 4016 * initial value 4017 */ 4018 net->rto_needed = 1; 4019 net->RTO = 0; 4020 net->RTO_measured = 0; 4021 stcb->asoc.numnets++; 4022 *(&net->ref_count) = 1; 4023 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 4024 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 4025 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4026 } else { 4027 net->port = 0; 4028 } 4029 net->dscp = stcb->asoc.default_dscp; 4030 #ifdef INET6 4031 net->flowlabel = stcb->asoc.default_flowlabel; 4032 #endif 4033 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 4034 net->dest_state |= SCTP_ADDR_NOHB; 4035 } else { 4036 net->dest_state &= ~SCTP_ADDR_NOHB; 4037 } 4038 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 4039 net->dest_state |= SCTP_ADDR_NO_PMTUD; 4040 } else { 4041 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 4042 } 4043 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 4044 /* Init the timer structure */ 4045 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 4046 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 4047 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 4048 4049 /* Now generate a route for this guy */ 4050 #ifdef INET6 4051 /* KAME hack: embed scopeid */ 4052 if (newaddr->sa_family == AF_INET6) { 4053 struct sockaddr_in6 *sin6; 4054 4055 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4056 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 4057 sin6->sin6_scope_id = 0; 4058 } 4059 #endif 4060 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 4061 4062 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 4063 /* Get source address */ 4064 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 4065 stcb, 4066 (sctp_route_t *) & net->ro, 4067 net, 4068 0, 4069 stcb->asoc.vrf_id); 4070 /* Now get the interface MTU */ 4071 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 4072 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 4073 } else { 4074 net->mtu = 0; 4075 } 4076 if (net->mtu == 0) { 4077 /* Huh ?? */ 4078 net->mtu = SCTP_DEFAULT_MTU; 4079 } else { 4080 uint32_t rmtu; 4081 4082 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 4083 if (rmtu == 0) { 4084 /* 4085 * Start things off to match mtu of 4086 * interface please. 4087 */ 4088 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 4089 net->ro.ro_rt, net->mtu); 4090 } else { 4091 /* 4092 * we take the route mtu over the interface, 4093 * since the route may be leading out the 4094 * loopback, or a different interface. 4095 */ 4096 net->mtu = rmtu; 4097 } 4098 } 4099 if (from == SCTP_ALLOC_ASOC) { 4100 stcb->asoc.smallest_mtu = net->mtu; 4101 } 4102 } else { 4103 net->mtu = stcb->asoc.smallest_mtu; 4104 } 4105 #ifdef INET6 4106 if (newaddr->sa_family == AF_INET6) { 4107 struct sockaddr_in6 *sin6; 4108 4109 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4110 (void)sa6_recoverscope(sin6); 4111 } 4112 #endif 4113 if (net->port) { 4114 net->mtu -= sizeof(struct udphdr); 4115 } 4116 if (stcb->asoc.smallest_mtu > net->mtu) { 4117 stcb->asoc.smallest_mtu = net->mtu; 4118 } 4119 /* JRS - Use the congestion control given in the CC module */ 4120 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4121 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4122 4123 /* 4124 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4125 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4126 */ 4127 net->find_pseudo_cumack = 1; 4128 net->find_rtx_pseudo_cumack = 1; 4129 net->src_addr_selected = 0; 4130 /* Choose an initial flowid. */ 4131 net->flowid = stcb->asoc.my_vtag ^ 4132 ntohs(stcb->rport) ^ 4133 ntohs(stcb->sctp_ep->sctp_lport); 4134 #ifdef INVARIANTS 4135 net->flowidset = 1; 4136 #endif 4137 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4138 if (net->ro.ro_rt == NULL) { 4139 /* Since we have no route put it at the back */ 4140 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4141 } else if (netfirst == NULL) { 4142 /* We are the first one in the pool. */ 4143 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4144 } else if (netfirst->ro.ro_rt == NULL) { 4145 /* 4146 * First one has NO route. Place this one ahead of the first 4147 * one. 4148 */ 4149 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4150 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4151 /* 4152 * This one has a different interface than the one at the 4153 * top of the list. Place it ahead. 4154 */ 4155 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4156 } else { 4157 /* 4158 * Ok we have the same interface as the first one. Move 4159 * forward until we find either a) one with a NULL route... 4160 * insert ahead of that b) one with a different ifp.. insert 4161 * after that. c) end of the list.. insert at the tail. 4162 */ 4163 struct sctp_nets *netlook; 4164 4165 do { 4166 netlook = TAILQ_NEXT(netfirst, sctp_next); 4167 if (netlook == NULL) { 4168 /* End of the list */ 4169 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4170 break; 4171 } else if (netlook->ro.ro_rt == NULL) { 4172 /* next one has NO route */ 4173 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4174 break; 4175 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4176 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4177 net, sctp_next); 4178 break; 4179 } 4180 /* Shift forward */ 4181 netfirst = netlook; 4182 } while (netlook != NULL); 4183 } 4184 4185 /* got to have a primary set */ 4186 if (stcb->asoc.primary_destination == 0) { 4187 stcb->asoc.primary_destination = net; 4188 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4189 (net->ro.ro_rt) && 4190 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4191 /* No route to current primary adopt new primary */ 4192 stcb->asoc.primary_destination = net; 4193 } 4194 /* Validate primary is first */ 4195 net = TAILQ_FIRST(&stcb->asoc.nets); 4196 if ((net != stcb->asoc.primary_destination) && 4197 (stcb->asoc.primary_destination)) { 4198 /* 4199 * first one on the list is NOT the primary sctp_cmpaddr() 4200 * is much more efficient if the primary is the first on the 4201 * list, make it so. 4202 */ 4203 TAILQ_REMOVE(&stcb->asoc.nets, 4204 stcb->asoc.primary_destination, sctp_next); 4205 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4206 stcb->asoc.primary_destination, sctp_next); 4207 } 4208 if (netp) { 4209 *netp = net; 4210 } 4211 return (0); 4212 } 4213 4214 4215 static uint32_t 4216 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4217 { 4218 uint32_t id; 4219 struct sctpasochead *head; 4220 struct sctp_tcb *lstcb; 4221 4222 SCTP_INP_WLOCK(inp); 4223 try_again: 4224 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4225 /* TSNH */ 4226 SCTP_INP_WUNLOCK(inp); 4227 return (0); 4228 } 4229 /* 4230 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4231 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4232 */ 4233 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4234 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4235 } 4236 id = inp->sctp_associd_counter; 4237 inp->sctp_associd_counter++; 4238 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4239 if (lstcb) { 4240 goto try_again; 4241 } 4242 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4243 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4244 stcb->asoc.in_asocid_hash = 1; 4245 SCTP_INP_WUNLOCK(inp); 4246 return id; 4247 } 4248 4249 /* 4250 * allocate an association and add it to the endpoint. The caller must be 4251 * careful to add all additional addresses once they are know right away or 4252 * else the assoc will be may experience a blackout scenario. 4253 */ 4254 struct sctp_tcb * 4255 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4256 int *error, uint32_t override_tag, uint32_t vrf_id, 4257 struct thread *p 4258 ) 4259 { 4260 /* note the p argument is only valid in unbound sockets */ 4261 4262 struct sctp_tcb *stcb; 4263 struct sctp_association *asoc; 4264 struct sctpasochead *head; 4265 uint16_t rport; 4266 int err; 4267 4268 /* 4269 * Assumption made here: Caller has done a 4270 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4271 * address does not exist already. 4272 */ 4273 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4274 /* Hit max assoc, sorry no more */ 4275 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4276 *error = ENOBUFS; 4277 return (NULL); 4278 } 4279 if (firstaddr == NULL) { 4280 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4281 *error = EINVAL; 4282 return (NULL); 4283 } 4284 SCTP_INP_RLOCK(inp); 4285 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4286 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4287 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4288 /* 4289 * If its in the TCP pool, its NOT allowed to create an 4290 * association. The parent listener needs to call 4291 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4292 * off, or connected one does this.. its an error. 4293 */ 4294 SCTP_INP_RUNLOCK(inp); 4295 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4296 *error = EINVAL; 4297 return (NULL); 4298 } 4299 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4300 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4301 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4302 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4303 SCTP_INP_RUNLOCK(inp); 4304 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4305 *error = EINVAL; 4306 return (NULL); 4307 } 4308 } 4309 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4310 #ifdef SCTP_DEBUG 4311 if (firstaddr) { 4312 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4313 switch (firstaddr->sa_family) { 4314 #ifdef INET 4315 case AF_INET: 4316 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4317 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4318 break; 4319 #endif 4320 #ifdef INET6 4321 case AF_INET6: 4322 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4323 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4324 break; 4325 #endif 4326 default: 4327 break; 4328 } 4329 } else { 4330 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4331 } 4332 #endif /* SCTP_DEBUG */ 4333 switch (firstaddr->sa_family) { 4334 #ifdef INET 4335 case AF_INET: 4336 { 4337 struct sockaddr_in *sin; 4338 4339 sin = (struct sockaddr_in *)firstaddr; 4340 if ((ntohs(sin->sin_port) == 0) || 4341 (sin->sin_addr.s_addr == INADDR_ANY) || 4342 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4343 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4344 /* Invalid address */ 4345 SCTP_INP_RUNLOCK(inp); 4346 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4347 *error = EINVAL; 4348 return (NULL); 4349 } 4350 rport = sin->sin_port; 4351 break; 4352 } 4353 #endif 4354 #ifdef INET6 4355 case AF_INET6: 4356 { 4357 struct sockaddr_in6 *sin6; 4358 4359 sin6 = (struct sockaddr_in6 *)firstaddr; 4360 if ((ntohs(sin6->sin6_port) == 0) || 4361 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4362 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4363 /* Invalid address */ 4364 SCTP_INP_RUNLOCK(inp); 4365 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4366 *error = EINVAL; 4367 return (NULL); 4368 } 4369 rport = sin6->sin6_port; 4370 break; 4371 } 4372 #endif 4373 default: 4374 /* not supported family type */ 4375 SCTP_INP_RUNLOCK(inp); 4376 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4377 *error = EINVAL; 4378 return (NULL); 4379 } 4380 SCTP_INP_RUNLOCK(inp); 4381 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4382 /* 4383 * If you have not performed a bind, then we need to do the 4384 * ephemeral bind for you. 4385 */ 4386 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4387 (struct sockaddr *)NULL, 4388 (struct sctp_ifa *)NULL, 4389 p 4390 ))) { 4391 /* bind error, probably perm */ 4392 *error = err; 4393 return (NULL); 4394 } 4395 } 4396 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4397 if (stcb == NULL) { 4398 /* out of memory? */ 4399 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4400 *error = ENOMEM; 4401 return (NULL); 4402 } 4403 SCTP_INCR_ASOC_COUNT(); 4404 4405 bzero(stcb, sizeof(*stcb)); 4406 asoc = &stcb->asoc; 4407 4408 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4409 SCTP_TCB_LOCK_INIT(stcb); 4410 SCTP_TCB_SEND_LOCK_INIT(stcb); 4411 stcb->rport = rport; 4412 /* setup back pointer's */ 4413 stcb->sctp_ep = inp; 4414 stcb->sctp_socket = inp->sctp_socket; 4415 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4416 /* failed */ 4417 SCTP_TCB_LOCK_DESTROY(stcb); 4418 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4419 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4420 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4421 SCTP_DECR_ASOC_COUNT(); 4422 *error = err; 4423 return (NULL); 4424 } 4425 /* and the port */ 4426 SCTP_INP_INFO_WLOCK(); 4427 SCTP_INP_WLOCK(inp); 4428 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4429 /* inpcb freed while alloc going on */ 4430 SCTP_TCB_LOCK_DESTROY(stcb); 4431 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4432 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4433 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4434 SCTP_INP_WUNLOCK(inp); 4435 SCTP_INP_INFO_WUNLOCK(); 4436 SCTP_DECR_ASOC_COUNT(); 4437 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4438 *error = EINVAL; 4439 return (NULL); 4440 } 4441 SCTP_TCB_LOCK(stcb); 4442 4443 /* now that my_vtag is set, add it to the hash */ 4444 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4445 /* put it in the bucket in the vtag hash of assoc's for the system */ 4446 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4447 SCTP_INP_INFO_WUNLOCK(); 4448 4449 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4450 /* failure.. memory error? */ 4451 if (asoc->strmout) { 4452 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4453 asoc->strmout = NULL; 4454 } 4455 if (asoc->mapping_array) { 4456 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4457 asoc->mapping_array = NULL; 4458 } 4459 if (asoc->nr_mapping_array) { 4460 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4461 asoc->nr_mapping_array = NULL; 4462 } 4463 SCTP_DECR_ASOC_COUNT(); 4464 SCTP_TCB_LOCK_DESTROY(stcb); 4465 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4466 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4467 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4468 SCTP_INP_WUNLOCK(inp); 4469 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4470 *error = ENOBUFS; 4471 return (NULL); 4472 } 4473 /* Init all the timers */ 4474 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4475 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4476 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4477 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4478 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4479 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4480 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4481 4482 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4483 /* now file the port under the hash as well */ 4484 if (inp->sctp_tcbhash != NULL) { 4485 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4486 inp->sctp_hashmark)]; 4487 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4488 } 4489 SCTP_INP_WUNLOCK(inp); 4490 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4491 return (stcb); 4492 } 4493 4494 4495 void 4496 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4497 { 4498 struct sctp_association *asoc; 4499 4500 asoc = &stcb->asoc; 4501 asoc->numnets--; 4502 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4503 if (net == asoc->primary_destination) { 4504 /* Reset primary */ 4505 struct sctp_nets *lnet; 4506 4507 lnet = TAILQ_FIRST(&asoc->nets); 4508 /* 4509 * Mobility adaptation Ideally, if deleted destination is 4510 * the primary, it becomes a fast retransmission trigger by 4511 * the subsequent SET PRIMARY. (by micchie) 4512 */ 4513 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4514 SCTP_MOBILITY_BASE) || 4515 sctp_is_mobility_feature_on(stcb->sctp_ep, 4516 SCTP_MOBILITY_FASTHANDOFF)) { 4517 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4518 if (asoc->deleted_primary != NULL) { 4519 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4520 goto out; 4521 } 4522 asoc->deleted_primary = net; 4523 atomic_add_int(&net->ref_count, 1); 4524 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4525 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4526 sctp_mobility_feature_on(stcb->sctp_ep, 4527 SCTP_MOBILITY_PRIM_DELETED); 4528 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4529 stcb->sctp_ep, stcb, NULL); 4530 } 4531 out: 4532 /* Try to find a confirmed primary */ 4533 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4534 } 4535 if (net == asoc->last_data_chunk_from) { 4536 /* Reset primary */ 4537 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4538 } 4539 if (net == asoc->last_control_chunk_from) { 4540 /* Clear net */ 4541 asoc->last_control_chunk_from = NULL; 4542 } 4543 if (net == stcb->asoc.alternate) { 4544 sctp_free_remote_addr(stcb->asoc.alternate); 4545 stcb->asoc.alternate = NULL; 4546 } 4547 sctp_free_remote_addr(net); 4548 } 4549 4550 /* 4551 * remove a remote endpoint address from an association, it will fail if the 4552 * address does not exist. 4553 */ 4554 int 4555 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4556 { 4557 /* 4558 * Here we need to remove a remote address. This is quite simple, we 4559 * first find it in the list of address for the association 4560 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4561 * on that item. Note we do not allow it to be removed if there are 4562 * no other addresses. 4563 */ 4564 struct sctp_association *asoc; 4565 struct sctp_nets *net, *nnet; 4566 4567 asoc = &stcb->asoc; 4568 4569 /* locate the address */ 4570 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4571 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4572 continue; 4573 } 4574 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4575 remaddr)) { 4576 /* we found the guy */ 4577 if (asoc->numnets < 2) { 4578 /* Must have at LEAST two remote addresses */ 4579 return (-1); 4580 } else { 4581 sctp_remove_net(stcb, net); 4582 return (0); 4583 } 4584 } 4585 } 4586 /* not found. */ 4587 return (-2); 4588 } 4589 4590 void 4591 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4592 { 4593 struct sctpvtaghead *chain; 4594 struct sctp_tagblock *twait_block; 4595 int found = 0; 4596 int i; 4597 4598 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4599 if (!LIST_EMPTY(chain)) { 4600 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4601 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4602 if ((twait_block->vtag_block[i].v_tag == tag) && 4603 (twait_block->vtag_block[i].lport == lport) && 4604 (twait_block->vtag_block[i].rport == rport)) { 4605 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4606 twait_block->vtag_block[i].v_tag = 0; 4607 twait_block->vtag_block[i].lport = 0; 4608 twait_block->vtag_block[i].rport = 0; 4609 found = 1; 4610 break; 4611 } 4612 } 4613 if (found) 4614 break; 4615 } 4616 } 4617 } 4618 4619 int 4620 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4621 { 4622 struct sctpvtaghead *chain; 4623 struct sctp_tagblock *twait_block; 4624 int found = 0; 4625 int i; 4626 4627 SCTP_INP_INFO_WLOCK(); 4628 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4629 if (!LIST_EMPTY(chain)) { 4630 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4631 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4632 if ((twait_block->vtag_block[i].v_tag == tag) && 4633 (twait_block->vtag_block[i].lport == lport) && 4634 (twait_block->vtag_block[i].rport == rport)) { 4635 found = 1; 4636 break; 4637 } 4638 } 4639 if (found) 4640 break; 4641 } 4642 } 4643 SCTP_INP_INFO_WUNLOCK(); 4644 return (found); 4645 } 4646 4647 4648 void 4649 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4650 { 4651 struct sctpvtaghead *chain; 4652 struct sctp_tagblock *twait_block; 4653 struct timeval now; 4654 int set, i; 4655 4656 if (time == 0) { 4657 /* Its disabled */ 4658 return; 4659 } 4660 (void)SCTP_GETTIME_TIMEVAL(&now); 4661 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4662 set = 0; 4663 if (!LIST_EMPTY(chain)) { 4664 /* Block(s) present, lets find space, and expire on the fly */ 4665 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4666 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4667 if ((twait_block->vtag_block[i].v_tag == 0) && 4668 !set) { 4669 twait_block->vtag_block[i].tv_sec_at_expire = 4670 now.tv_sec + time; 4671 twait_block->vtag_block[i].v_tag = tag; 4672 twait_block->vtag_block[i].lport = lport; 4673 twait_block->vtag_block[i].rport = rport; 4674 set = 1; 4675 } else if ((twait_block->vtag_block[i].v_tag) && 4676 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4677 /* Audit expires this guy */ 4678 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4679 twait_block->vtag_block[i].v_tag = 0; 4680 twait_block->vtag_block[i].lport = 0; 4681 twait_block->vtag_block[i].rport = 0; 4682 if (set == 0) { 4683 /* Reuse it for my new tag */ 4684 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4685 twait_block->vtag_block[i].v_tag = tag; 4686 twait_block->vtag_block[i].lport = lport; 4687 twait_block->vtag_block[i].rport = rport; 4688 set = 1; 4689 } 4690 } 4691 } 4692 if (set) { 4693 /* 4694 * We only do up to the block where we can 4695 * place our tag for audits 4696 */ 4697 break; 4698 } 4699 } 4700 } 4701 /* Need to add a new block to chain */ 4702 if (!set) { 4703 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4704 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4705 if (twait_block == NULL) { 4706 #ifdef INVARIANTS 4707 panic("Can not alloc tagblock"); 4708 #endif 4709 return; 4710 } 4711 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4712 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4713 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4714 twait_block->vtag_block[0].v_tag = tag; 4715 twait_block->vtag_block[0].lport = lport; 4716 twait_block->vtag_block[0].rport = rport; 4717 } 4718 } 4719 4720 4721 4722 /*- 4723 * Free the association after un-hashing the remote port. This 4724 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4725 * expect that the input to this function IS a locked TCB. 4726 * It will return 0, if it did NOT destroy the association (instead 4727 * it unlocks it. It will return NON-zero if it either destroyed the 4728 * association OR the association is already destroyed. 4729 */ 4730 int 4731 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4732 { 4733 int i; 4734 struct sctp_association *asoc; 4735 struct sctp_nets *net, *nnet; 4736 struct sctp_laddr *laddr, *naddr; 4737 struct sctp_tmit_chunk *chk, *nchk; 4738 struct sctp_asconf_addr *aparam, *naparam; 4739 struct sctp_asconf_ack *aack, *naack; 4740 struct sctp_stream_reset_list *strrst, *nstrrst; 4741 struct sctp_queued_to_read *sq, *nsq; 4742 struct sctp_stream_queue_pending *sp, *nsp; 4743 sctp_sharedkey_t *shared_key, *nshared_key; 4744 struct socket *so; 4745 4746 /* first, lets purge the entry from the hash table. */ 4747 4748 #ifdef SCTP_LOG_CLOSING 4749 sctp_log_closing(inp, stcb, 6); 4750 #endif 4751 if (stcb->asoc.state == 0) { 4752 #ifdef SCTP_LOG_CLOSING 4753 sctp_log_closing(inp, NULL, 7); 4754 #endif 4755 /* there is no asoc, really TSNH :-0 */ 4756 return (1); 4757 } 4758 if (stcb->asoc.alternate) { 4759 sctp_free_remote_addr(stcb->asoc.alternate); 4760 stcb->asoc.alternate = NULL; 4761 } 4762 /* TEMP CODE */ 4763 if (stcb->freed_from_where == 0) { 4764 /* Only record the first place free happened from */ 4765 stcb->freed_from_where = from_location; 4766 } 4767 /* TEMP CODE */ 4768 4769 asoc = &stcb->asoc; 4770 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4771 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4772 /* nothing around */ 4773 so = NULL; 4774 else 4775 so = inp->sctp_socket; 4776 4777 /* 4778 * We used timer based freeing if a reader or writer is in the way. 4779 * So we first check if we are actually being called from a timer, 4780 * if so we abort early if a reader or writer is still in the way. 4781 */ 4782 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4783 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4784 /* 4785 * is it the timer driving us? if so are the reader/writers 4786 * gone? 4787 */ 4788 if (stcb->asoc.refcnt) { 4789 /* nope, reader or writer in the way */ 4790 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4791 /* no asoc destroyed */ 4792 SCTP_TCB_UNLOCK(stcb); 4793 #ifdef SCTP_LOG_CLOSING 4794 sctp_log_closing(inp, stcb, 8); 4795 #endif 4796 return (0); 4797 } 4798 } 4799 /* now clean up any other timers */ 4800 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4801 asoc->dack_timer.self = NULL; 4802 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4803 /*- 4804 * For stream reset we don't blast this unless 4805 * it is a str-reset timer, it might be the 4806 * free-asoc timer which we DON'T want to 4807 * disturb. 4808 */ 4809 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4810 asoc->strreset_timer.self = NULL; 4811 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4812 asoc->asconf_timer.self = NULL; 4813 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4814 asoc->autoclose_timer.self = NULL; 4815 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4816 asoc->shut_guard_timer.self = NULL; 4817 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4818 asoc->delayed_event_timer.self = NULL; 4819 /* Mobility adaptation */ 4820 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4821 asoc->delete_prim_timer.self = NULL; 4822 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4823 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4824 net->rxt_timer.self = NULL; 4825 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4826 net->pmtu_timer.self = NULL; 4827 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4828 net->hb_timer.self = NULL; 4829 } 4830 /* Now the read queue needs to be cleaned up (only once) */ 4831 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4832 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4833 SCTP_INP_READ_LOCK(inp); 4834 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4835 if (sq->stcb == stcb) { 4836 sq->do_not_ref_stcb = 1; 4837 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4838 /* 4839 * If there is no end, there never will be 4840 * now. 4841 */ 4842 if (sq->end_added == 0) { 4843 /* Held for PD-API clear that. */ 4844 sq->pdapi_aborted = 1; 4845 sq->held_length = 0; 4846 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4847 /* 4848 * Need to add a PD-API 4849 * aborted indication. 4850 * Setting the control_pdapi 4851 * assures that it will be 4852 * added right after this 4853 * msg. 4854 */ 4855 uint32_t strseq; 4856 4857 stcb->asoc.control_pdapi = sq; 4858 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4859 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4860 stcb, 4861 SCTP_PARTIAL_DELIVERY_ABORTED, 4862 (void *)&strseq, 4863 SCTP_SO_LOCKED); 4864 stcb->asoc.control_pdapi = NULL; 4865 } 4866 } 4867 /* Add an end to wake them */ 4868 sq->end_added = 1; 4869 } 4870 } 4871 SCTP_INP_READ_UNLOCK(inp); 4872 if (stcb->block_entry) { 4873 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4874 stcb->block_entry->error = ECONNRESET; 4875 stcb->block_entry = NULL; 4876 } 4877 } 4878 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4879 /* 4880 * Someone holds a reference OR the socket is unaccepted 4881 * yet. 4882 */ 4883 if ((stcb->asoc.refcnt) || 4884 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4885 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4886 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4887 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4888 } 4889 SCTP_TCB_UNLOCK(stcb); 4890 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4891 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4892 /* nothing around */ 4893 so = NULL; 4894 if (so) { 4895 /* Wake any reader/writers */ 4896 sctp_sorwakeup(inp, so); 4897 sctp_sowwakeup(inp, so); 4898 } 4899 #ifdef SCTP_LOG_CLOSING 4900 sctp_log_closing(inp, stcb, 9); 4901 #endif 4902 /* no asoc destroyed */ 4903 return (0); 4904 } 4905 #ifdef SCTP_LOG_CLOSING 4906 sctp_log_closing(inp, stcb, 10); 4907 #endif 4908 /* 4909 * When I reach here, no others want to kill the assoc yet.. and I 4910 * own the lock. Now its possible an abort comes in when I do the 4911 * lock exchange below to grab all the locks to do the final take 4912 * out. to prevent this we increment the count, which will start a 4913 * timer and blow out above thus assuring us that we hold exclusive 4914 * killing of the asoc. Note that after getting back the TCB lock we 4915 * will go ahead and increment the counter back up and stop any 4916 * timer a passing stranger may have started :-S 4917 */ 4918 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4919 atomic_add_int(&stcb->asoc.refcnt, 1); 4920 4921 SCTP_TCB_UNLOCK(stcb); 4922 SCTP_INP_INFO_WLOCK(); 4923 SCTP_INP_WLOCK(inp); 4924 SCTP_TCB_LOCK(stcb); 4925 } 4926 /* Double check the GONE flag */ 4927 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4928 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4929 /* nothing around */ 4930 so = NULL; 4931 4932 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4933 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4934 /* 4935 * For TCP type we need special handling when we are 4936 * connected. We also include the peel'ed off ones to. 4937 */ 4938 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4939 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4940 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4941 if (so) { 4942 SOCK_LOCK(so); 4943 if (so->so_rcv.sb_cc == 0) { 4944 so->so_state &= ~(SS_ISCONNECTING | 4945 SS_ISDISCONNECTING | 4946 SS_ISCONFIRMING | 4947 SS_ISCONNECTED); 4948 } 4949 socantrcvmore_locked(so); 4950 sctp_sowwakeup(inp, so); 4951 sctp_sorwakeup(inp, so); 4952 SCTP_SOWAKEUP(so); 4953 } 4954 } 4955 } 4956 /* 4957 * Make it invalid too, that way if its about to run it will abort 4958 * and return. 4959 */ 4960 /* re-increment the lock */ 4961 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4962 atomic_add_int(&stcb->asoc.refcnt, -1); 4963 } 4964 if (stcb->asoc.refcnt) { 4965 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4966 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4967 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4968 SCTP_INP_INFO_WUNLOCK(); 4969 SCTP_INP_WUNLOCK(inp); 4970 } 4971 SCTP_TCB_UNLOCK(stcb); 4972 return (0); 4973 } 4974 asoc->state = 0; 4975 if (inp->sctp_tcbhash) { 4976 LIST_REMOVE(stcb, sctp_tcbhash); 4977 } 4978 if (stcb->asoc.in_asocid_hash) { 4979 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4980 } 4981 /* Now lets remove it from the list of ALL associations in the EP */ 4982 LIST_REMOVE(stcb, sctp_tcblist); 4983 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4984 SCTP_INP_INCR_REF(inp); 4985 SCTP_INP_WUNLOCK(inp); 4986 } 4987 /* pull from vtag hash */ 4988 LIST_REMOVE(stcb, sctp_asocs); 4989 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4990 inp->sctp_lport, stcb->rport); 4991 4992 /* 4993 * Now restop the timers to be sure this is paranoia at is finest! 4994 */ 4995 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4996 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4997 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4998 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4999 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 5000 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 5001 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 5002 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5003 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 5004 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 5005 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 5006 } 5007 5008 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 5009 /* 5010 * The chunk lists and such SHOULD be empty but we check them just 5011 * in case. 5012 */ 5013 /* anything on the wheel needs to be removed */ 5014 for (i = 0; i < asoc->streamoutcnt; i++) { 5015 struct sctp_stream_out *outs; 5016 5017 outs = &asoc->strmout[i]; 5018 /* now clean up any chunks here */ 5019 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 5020 TAILQ_REMOVE(&outs->outqueue, sp, next); 5021 if (sp->data) { 5022 if (so) { 5023 /* Still an open socket - report */ 5024 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 5025 SCTP_NOTIFY_DATAGRAM_UNSENT, 5026 (void *)sp, SCTP_SO_LOCKED); 5027 } 5028 if (sp->data) { 5029 sctp_m_freem(sp->data); 5030 sp->data = NULL; 5031 sp->tail_mbuf = NULL; 5032 } 5033 } 5034 if (sp->net) { 5035 sctp_free_remote_addr(sp->net); 5036 sp->net = NULL; 5037 } 5038 sctp_free_spbufspace(stcb, asoc, sp); 5039 if (sp->holds_key_ref) 5040 sctp_auth_key_release(stcb, sp->auth_keyid, SCTP_SO_LOCKED); 5041 /* Free the zone stuff */ 5042 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 5043 SCTP_DECR_STRMOQ_COUNT(); 5044 /* sa_ignore FREED_MEMORY */ 5045 } 5046 } 5047 /* sa_ignore FREED_MEMORY */ 5048 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 5049 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 5050 SCTP_FREE(strrst, SCTP_M_STRESET); 5051 } 5052 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 5053 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 5054 if (sq->data) { 5055 sctp_m_freem(sq->data); 5056 sq->data = NULL; 5057 } 5058 sctp_free_remote_addr(sq->whoFrom); 5059 sq->whoFrom = NULL; 5060 sq->stcb = NULL; 5061 /* Free the ctl entry */ 5062 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 5063 SCTP_DECR_READQ_COUNT(); 5064 /* sa_ignore FREED_MEMORY */ 5065 } 5066 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 5067 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5068 if (chk->data) { 5069 sctp_m_freem(chk->data); 5070 chk->data = NULL; 5071 } 5072 if (chk->holds_key_ref) 5073 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5074 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5075 SCTP_DECR_CHK_COUNT(); 5076 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5077 asoc->free_chunk_cnt--; 5078 /* sa_ignore FREED_MEMORY */ 5079 } 5080 /* pending send queue SHOULD be empty */ 5081 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5082 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5083 if (chk->data) { 5084 if (so) { 5085 /* Still a socket? */ 5086 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 5087 SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED); 5088 } 5089 if (chk->data) { 5090 sctp_m_freem(chk->data); 5091 chk->data = NULL; 5092 } 5093 } 5094 if (chk->holds_key_ref) 5095 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5096 if (chk->whoTo) { 5097 sctp_free_remote_addr(chk->whoTo); 5098 chk->whoTo = NULL; 5099 } 5100 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5101 SCTP_DECR_CHK_COUNT(); 5102 /* sa_ignore FREED_MEMORY */ 5103 } 5104 /* sent queue SHOULD be empty */ 5105 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5106 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5107 if (chk->data) { 5108 if (so) { 5109 /* Still a socket? */ 5110 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 5111 SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED); 5112 } 5113 if (chk->data) { 5114 sctp_m_freem(chk->data); 5115 chk->data = NULL; 5116 } 5117 } 5118 if (chk->holds_key_ref) 5119 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5120 sctp_free_remote_addr(chk->whoTo); 5121 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5122 SCTP_DECR_CHK_COUNT(); 5123 /* sa_ignore FREED_MEMORY */ 5124 } 5125 /* control queue MAY not be empty */ 5126 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5127 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5128 if (chk->data) { 5129 sctp_m_freem(chk->data); 5130 chk->data = NULL; 5131 } 5132 if (chk->holds_key_ref) 5133 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5134 sctp_free_remote_addr(chk->whoTo); 5135 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5136 SCTP_DECR_CHK_COUNT(); 5137 /* sa_ignore FREED_MEMORY */ 5138 } 5139 /* ASCONF queue MAY not be empty */ 5140 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5141 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5142 if (chk->data) { 5143 sctp_m_freem(chk->data); 5144 chk->data = NULL; 5145 } 5146 if (chk->holds_key_ref) 5147 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5148 sctp_free_remote_addr(chk->whoTo); 5149 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5150 SCTP_DECR_CHK_COUNT(); 5151 /* sa_ignore FREED_MEMORY */ 5152 } 5153 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5154 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5155 if (chk->data) { 5156 sctp_m_freem(chk->data); 5157 chk->data = NULL; 5158 } 5159 if (chk->holds_key_ref) 5160 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5161 sctp_free_remote_addr(chk->whoTo); 5162 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5163 SCTP_DECR_CHK_COUNT(); 5164 /* sa_ignore FREED_MEMORY */ 5165 } 5166 5167 if (asoc->mapping_array) { 5168 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5169 asoc->mapping_array = NULL; 5170 } 5171 if (asoc->nr_mapping_array) { 5172 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5173 asoc->nr_mapping_array = NULL; 5174 } 5175 /* the stream outs */ 5176 if (asoc->strmout) { 5177 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5178 asoc->strmout = NULL; 5179 } 5180 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5181 if (asoc->strmin) { 5182 struct sctp_queued_to_read *ctl, *nctl; 5183 5184 for (i = 0; i < asoc->streamincnt; i++) { 5185 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5186 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5187 sctp_free_remote_addr(ctl->whoFrom); 5188 if (ctl->data) { 5189 sctp_m_freem(ctl->data); 5190 ctl->data = NULL; 5191 } 5192 /* 5193 * We don't free the address here since all 5194 * the net's were freed above. 5195 */ 5196 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5197 SCTP_DECR_READQ_COUNT(); 5198 } 5199 } 5200 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5201 asoc->strmin = NULL; 5202 } 5203 asoc->streamincnt = 0; 5204 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5205 #ifdef INVARIANTS 5206 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5207 panic("no net's left alloc'ed, or list points to itself"); 5208 } 5209 #endif 5210 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5211 sctp_free_remote_addr(net); 5212 } 5213 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5214 /* sa_ignore FREED_MEMORY */ 5215 sctp_remove_laddr(laddr); 5216 } 5217 5218 /* pending asconf (address) parameters */ 5219 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5220 /* sa_ignore FREED_MEMORY */ 5221 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5222 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5223 } 5224 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5225 /* sa_ignore FREED_MEMORY */ 5226 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5227 if (aack->data != NULL) { 5228 sctp_m_freem(aack->data); 5229 } 5230 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5231 } 5232 /* clean up auth stuff */ 5233 if (asoc->local_hmacs) 5234 sctp_free_hmaclist(asoc->local_hmacs); 5235 if (asoc->peer_hmacs) 5236 sctp_free_hmaclist(asoc->peer_hmacs); 5237 5238 if (asoc->local_auth_chunks) 5239 sctp_free_chunklist(asoc->local_auth_chunks); 5240 if (asoc->peer_auth_chunks) 5241 sctp_free_chunklist(asoc->peer_auth_chunks); 5242 5243 sctp_free_authinfo(&asoc->authinfo); 5244 5245 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5246 LIST_REMOVE(shared_key, next); 5247 sctp_free_sharedkey(shared_key); 5248 /* sa_ignore FREED_MEMORY */ 5249 } 5250 5251 /* Insert new items here :> */ 5252 5253 /* Get rid of LOCK */ 5254 SCTP_TCB_LOCK_DESTROY(stcb); 5255 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5256 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5257 SCTP_INP_INFO_WUNLOCK(); 5258 SCTP_INP_RLOCK(inp); 5259 } 5260 #ifdef SCTP_TRACK_FREED_ASOCS 5261 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5262 /* now clean up the tasoc itself */ 5263 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5264 SCTP_DECR_ASOC_COUNT(); 5265 } else { 5266 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5267 } 5268 #else 5269 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5270 SCTP_DECR_ASOC_COUNT(); 5271 #endif 5272 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5273 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5274 /* 5275 * If its NOT the inp_free calling us AND sctp_close 5276 * as been called, we call back... 5277 */ 5278 SCTP_INP_RUNLOCK(inp); 5279 /* 5280 * This will start the kill timer (if we are the 5281 * last one) since we hold an increment yet. But 5282 * this is the only safe way to do this since 5283 * otherwise if the socket closes at the same time 5284 * we are here we might collide in the cleanup. 5285 */ 5286 sctp_inpcb_free(inp, 5287 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5288 SCTP_CALLED_DIRECTLY_NOCMPSET); 5289 SCTP_INP_DECR_REF(inp); 5290 goto out_of; 5291 } else { 5292 /* The socket is still open. */ 5293 SCTP_INP_DECR_REF(inp); 5294 } 5295 } 5296 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5297 SCTP_INP_RUNLOCK(inp); 5298 } 5299 out_of: 5300 /* destroyed the asoc */ 5301 #ifdef SCTP_LOG_CLOSING 5302 sctp_log_closing(inp, NULL, 11); 5303 #endif 5304 return (1); 5305 } 5306 5307 5308 5309 /* 5310 * determine if a destination is "reachable" based upon the addresses bound 5311 * to the current endpoint (e.g. only v4 or v6 currently bound) 5312 */ 5313 /* 5314 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5315 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5316 * types bound as its endpoint 5317 */ 5318 int 5319 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5320 { 5321 struct sctp_inpcb *inp; 5322 int answer; 5323 5324 /* 5325 * No locks here, the TCB, in all cases is already locked and an 5326 * assoc is up. There is either a INP lock by the caller applied (in 5327 * asconf case when deleting an address) or NOT in the HB case, 5328 * however if HB then the INP increment is up and the INP will not 5329 * be removed (on top of the fact that we have a TCB lock). So we 5330 * only want to read the sctp_flags, which is either bound-all or 5331 * not.. no protection needed since once an assoc is up you can't be 5332 * changing your binding. 5333 */ 5334 inp = stcb->sctp_ep; 5335 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5336 /* if bound all, destination is not restricted */ 5337 /* 5338 * RRS: Question during lock work: Is this correct? If you 5339 * are bound-all you still might need to obey the V4--V6 5340 * flags??? IMO this bound-all stuff needs to be removed! 5341 */ 5342 return (1); 5343 } 5344 /* NOTE: all "scope" checks are done when local addresses are added */ 5345 switch (destaddr->sa_family) { 5346 case AF_INET6: 5347 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5348 break; 5349 case AF_INET: 5350 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5351 break; 5352 default: 5353 /* invalid family, so it's unreachable */ 5354 answer = 0; 5355 break; 5356 } 5357 return (answer); 5358 } 5359 5360 /* 5361 * update the inp_vflags on an endpoint 5362 */ 5363 static void 5364 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5365 { 5366 struct sctp_laddr *laddr; 5367 5368 /* first clear the flag */ 5369 inp->ip_inp.inp.inp_vflag = 0; 5370 /* set the flag based on addresses on the ep list */ 5371 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5372 if (laddr->ifa == NULL) { 5373 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5374 __FUNCTION__); 5375 continue; 5376 } 5377 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5378 continue; 5379 } 5380 switch (laddr->ifa->address.sa.sa_family) { 5381 #ifdef INET6 5382 case AF_INET6: 5383 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5384 break; 5385 #endif 5386 #ifdef INET 5387 case AF_INET: 5388 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5389 break; 5390 #endif 5391 default: 5392 break; 5393 } 5394 } 5395 } 5396 5397 /* 5398 * Add the address to the endpoint local address list There is nothing to be 5399 * done if we are bound to all addresses 5400 */ 5401 void 5402 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5403 { 5404 struct sctp_laddr *laddr; 5405 int fnd, error = 0; 5406 5407 fnd = 0; 5408 5409 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5410 /* You are already bound to all. You have it already */ 5411 return; 5412 } 5413 #ifdef INET6 5414 if (ifa->address.sa.sa_family == AF_INET6) { 5415 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5416 /* Can't bind a non-useable addr. */ 5417 return; 5418 } 5419 } 5420 #endif 5421 /* first, is it already present? */ 5422 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5423 if (laddr->ifa == ifa) { 5424 fnd = 1; 5425 break; 5426 } 5427 } 5428 5429 if (fnd == 0) { 5430 /* Not in the ep list */ 5431 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5432 if (error != 0) 5433 return; 5434 inp->laddr_count++; 5435 /* update inp_vflag flags */ 5436 switch (ifa->address.sa.sa_family) { 5437 #ifdef INET6 5438 case AF_INET6: 5439 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5440 break; 5441 #endif 5442 #ifdef INET6 5443 case AF_INET: 5444 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5445 break; 5446 #endif 5447 default: 5448 break; 5449 } 5450 } 5451 return; 5452 } 5453 5454 5455 /* 5456 * select a new (hopefully reachable) destination net (should only be used 5457 * when we deleted an ep addr that is the only usable source address to reach 5458 * the destination net) 5459 */ 5460 static void 5461 sctp_select_primary_destination(struct sctp_tcb *stcb) 5462 { 5463 struct sctp_nets *net; 5464 5465 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5466 /* for now, we'll just pick the first reachable one we find */ 5467 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5468 continue; 5469 if (sctp_destination_is_reachable(stcb, 5470 (struct sockaddr *)&net->ro._l_addr)) { 5471 /* found a reachable destination */ 5472 stcb->asoc.primary_destination = net; 5473 } 5474 } 5475 /* I can't there from here! ...we're gonna die shortly... */ 5476 } 5477 5478 5479 /* 5480 * Delete the address from the endpoint local address list There is nothing 5481 * to be done if we are bound to all addresses 5482 */ 5483 void 5484 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5485 { 5486 struct sctp_laddr *laddr; 5487 int fnd; 5488 5489 fnd = 0; 5490 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5491 /* You are already bound to all. You have it already */ 5492 return; 5493 } 5494 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5495 if (laddr->ifa == ifa) { 5496 fnd = 1; 5497 break; 5498 } 5499 } 5500 if (fnd && (inp->laddr_count < 2)) { 5501 /* can't delete unless there are at LEAST 2 addresses */ 5502 return; 5503 } 5504 if (fnd) { 5505 /* 5506 * clean up any use of this address go through our 5507 * associations and clear any last_used_address that match 5508 * this one for each assoc, see if a new primary_destination 5509 * is needed 5510 */ 5511 struct sctp_tcb *stcb; 5512 5513 /* clean up "next_addr_touse" */ 5514 if (inp->next_addr_touse == laddr) 5515 /* delete this address */ 5516 inp->next_addr_touse = NULL; 5517 5518 /* clean up "last_used_address" */ 5519 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5520 struct sctp_nets *net; 5521 5522 SCTP_TCB_LOCK(stcb); 5523 if (stcb->asoc.last_used_address == laddr) 5524 /* delete this address */ 5525 stcb->asoc.last_used_address = NULL; 5526 /* 5527 * Now spin through all the nets and purge any ref 5528 * to laddr 5529 */ 5530 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5531 if (net->ro._s_addr && 5532 (net->ro._s_addr->ifa == laddr->ifa)) { 5533 /* Yep, purge src address selected */ 5534 sctp_rtentry_t *rt; 5535 5536 /* delete this address if cached */ 5537 rt = net->ro.ro_rt; 5538 if (rt != NULL) { 5539 RTFREE(rt); 5540 net->ro.ro_rt = NULL; 5541 } 5542 sctp_free_ifa(net->ro._s_addr); 5543 net->ro._s_addr = NULL; 5544 net->src_addr_selected = 0; 5545 } 5546 } 5547 SCTP_TCB_UNLOCK(stcb); 5548 } /* for each tcb */ 5549 /* remove it from the ep list */ 5550 sctp_remove_laddr(laddr); 5551 inp->laddr_count--; 5552 /* update inp_vflag flags */ 5553 sctp_update_ep_vflag(inp); 5554 } 5555 return; 5556 } 5557 5558 /* 5559 * Add the address to the TCB local address restricted list. 5560 * This is a "pending" address list (eg. addresses waiting for an 5561 * ASCONF-ACK response) and cannot be used as a valid source address. 5562 */ 5563 void 5564 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5565 { 5566 struct sctp_inpcb *inp; 5567 struct sctp_laddr *laddr; 5568 struct sctpladdr *list; 5569 5570 /* 5571 * Assumes TCB is locked.. and possibly the INP. May need to 5572 * confirm/fix that if we need it and is not the case. 5573 */ 5574 list = &stcb->asoc.sctp_restricted_addrs; 5575 5576 inp = stcb->sctp_ep; 5577 #ifdef INET6 5578 if (ifa->address.sa.sa_family == AF_INET6) { 5579 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5580 /* Can't bind a non-existent addr. */ 5581 return; 5582 } 5583 } 5584 #endif 5585 /* does the address already exist? */ 5586 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5587 if (laddr->ifa == ifa) { 5588 return; 5589 } 5590 } 5591 5592 /* add to the list */ 5593 (void)sctp_insert_laddr(list, ifa, 0); 5594 return; 5595 } 5596 5597 /* 5598 * insert an laddr entry with the given ifa for the desired list 5599 */ 5600 int 5601 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5602 { 5603 struct sctp_laddr *laddr; 5604 5605 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5606 if (laddr == NULL) { 5607 /* out of memory? */ 5608 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5609 return (EINVAL); 5610 } 5611 SCTP_INCR_LADDR_COUNT(); 5612 bzero(laddr, sizeof(*laddr)); 5613 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5614 laddr->ifa = ifa; 5615 laddr->action = act; 5616 atomic_add_int(&ifa->refcount, 1); 5617 /* insert it */ 5618 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5619 5620 return (0); 5621 } 5622 5623 /* 5624 * Remove an laddr entry from the local address list (on an assoc) 5625 */ 5626 void 5627 sctp_remove_laddr(struct sctp_laddr *laddr) 5628 { 5629 5630 /* remove from the list */ 5631 LIST_REMOVE(laddr, sctp_nxt_addr); 5632 sctp_free_ifa(laddr->ifa); 5633 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5634 SCTP_DECR_LADDR_COUNT(); 5635 } 5636 5637 /* 5638 * Remove a local address from the TCB local address restricted list 5639 */ 5640 void 5641 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5642 { 5643 struct sctp_inpcb *inp; 5644 struct sctp_laddr *laddr; 5645 5646 /* 5647 * This is called by asconf work. It is assumed that a) The TCB is 5648 * locked and b) The INP is locked. This is true in as much as I can 5649 * trace through the entry asconf code where I did these locks. 5650 * Again, the ASCONF code is a bit different in that it does lock 5651 * the INP during its work often times. This must be since we don't 5652 * want other proc's looking up things while what they are looking 5653 * up is changing :-D 5654 */ 5655 5656 inp = stcb->sctp_ep; 5657 /* if subset bound and don't allow ASCONF's, can't delete last */ 5658 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5659 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5660 if (stcb->sctp_ep->laddr_count < 2) { 5661 /* can't delete last address */ 5662 return; 5663 } 5664 } 5665 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5666 /* remove the address if it exists */ 5667 if (laddr->ifa == NULL) 5668 continue; 5669 if (laddr->ifa == ifa) { 5670 sctp_remove_laddr(laddr); 5671 return; 5672 } 5673 } 5674 5675 /* address not found! */ 5676 return; 5677 } 5678 5679 /* 5680 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5681 */ 5682 /* sysctl */ 5683 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5684 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5685 5686 5687 5688 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5689 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5690 int *sctp_cpuarry = NULL; 5691 void 5692 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5693 { 5694 /* Queue a packet to a processor for the specified core */ 5695 struct sctp_mcore_queue *qent; 5696 struct sctp_mcore_ctrl *wkq; 5697 int need_wake = 0; 5698 5699 if (sctp_mcore_workers == NULL) { 5700 /* Something went way bad during setup */ 5701 sctp_input_with_port(m, off, 0); 5702 return; 5703 } 5704 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5705 (sizeof(struct sctp_mcore_queue)), 5706 SCTP_M_MCORE); 5707 if (qent == NULL) { 5708 /* This is trouble */ 5709 sctp_input_with_port(m, off, 0); 5710 return; 5711 } 5712 qent->vn = curvnet; 5713 qent->m = m; 5714 qent->off = off; 5715 qent->v6 = 0; 5716 wkq = &sctp_mcore_workers[cpu_to_use]; 5717 SCTP_MCORE_QLOCK(wkq); 5718 5719 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5720 if (wkq->running == 0) { 5721 need_wake = 1; 5722 } 5723 SCTP_MCORE_QUNLOCK(wkq); 5724 if (need_wake) { 5725 wakeup(&wkq->running); 5726 } 5727 } 5728 5729 static void 5730 sctp_mcore_thread(void *arg) 5731 { 5732 5733 struct sctp_mcore_ctrl *wkq; 5734 struct sctp_mcore_queue *qent; 5735 5736 wkq = (struct sctp_mcore_ctrl *)arg; 5737 struct mbuf *m; 5738 int off, v6; 5739 5740 /* Wait for first tickle */ 5741 SCTP_MCORE_LOCK(wkq); 5742 wkq->running = 0; 5743 msleep(&wkq->running, 5744 &wkq->core_mtx, 5745 0, "wait for pkt", 0); 5746 SCTP_MCORE_UNLOCK(wkq); 5747 5748 /* Bind to our cpu */ 5749 thread_lock(curthread); 5750 sched_bind(curthread, wkq->cpuid); 5751 thread_unlock(curthread); 5752 5753 /* Now lets start working */ 5754 SCTP_MCORE_LOCK(wkq); 5755 /* Now grab lock and go */ 5756 while (1) { 5757 SCTP_MCORE_QLOCK(wkq); 5758 skip_sleep: 5759 wkq->running = 1; 5760 qent = TAILQ_FIRST(&wkq->que); 5761 if (qent) { 5762 TAILQ_REMOVE(&wkq->que, qent, next); 5763 SCTP_MCORE_QUNLOCK(wkq); 5764 CURVNET_SET(qent->vn); 5765 m = qent->m; 5766 off = qent->off; 5767 v6 = qent->v6; 5768 SCTP_FREE(qent, SCTP_M_MCORE); 5769 if (v6 == 0) { 5770 sctp_input_with_port(m, off, 0); 5771 } else { 5772 printf("V6 not yet supported\n"); 5773 sctp_m_freem(m); 5774 } 5775 CURVNET_RESTORE(); 5776 SCTP_MCORE_QLOCK(wkq); 5777 } 5778 wkq->running = 0; 5779 if (!TAILQ_EMPTY(&wkq->que)) { 5780 goto skip_sleep; 5781 } 5782 SCTP_MCORE_QUNLOCK(wkq); 5783 msleep(&wkq->running, 5784 &wkq->core_mtx, 5785 0, "wait for pkt", 0); 5786 }; 5787 } 5788 5789 static void 5790 sctp_startup_mcore_threads(void) 5791 { 5792 int i, cpu; 5793 5794 if (mp_ncpus == 1) 5795 return; 5796 5797 if (sctp_mcore_workers != NULL) { 5798 /* 5799 * Already been here in some previous vnet? 5800 */ 5801 return; 5802 } 5803 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5804 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5805 SCTP_M_MCORE); 5806 if (sctp_mcore_workers == NULL) { 5807 /* TSNH I hope */ 5808 return; 5809 } 5810 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5811 sizeof(struct sctp_mcore_ctrl))); 5812 /* Init the structures */ 5813 for (i = 0; i <= mp_maxid; i++) { 5814 TAILQ_INIT(&sctp_mcore_workers[i].que); 5815 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5816 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5817 sctp_mcore_workers[i].cpuid = i; 5818 } 5819 if (sctp_cpuarry == NULL) { 5820 SCTP_MALLOC(sctp_cpuarry, int *, 5821 (mp_ncpus * sizeof(int)), 5822 SCTP_M_MCORE); 5823 i = 0; 5824 CPU_FOREACH(cpu) { 5825 sctp_cpuarry[i] = cpu; 5826 i++; 5827 } 5828 } 5829 /* Now start them all */ 5830 CPU_FOREACH(cpu) { 5831 (void)kproc_create(sctp_mcore_thread, 5832 (void *)&sctp_mcore_workers[cpu], 5833 &sctp_mcore_workers[cpu].thread_proc, 5834 RFPROC, 5835 SCTP_KTHREAD_PAGES, 5836 SCTP_MCORE_NAME); 5837 5838 } 5839 } 5840 5841 #endif 5842 5843 void 5844 sctp_pcb_init() 5845 { 5846 /* 5847 * SCTP initialization for the PCB structures should be called by 5848 * the sctp_init() funciton. 5849 */ 5850 int i; 5851 struct timeval tv; 5852 5853 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5854 /* error I was called twice */ 5855 return; 5856 } 5857 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5858 5859 #if defined(SCTP_LOCAL_TRACE_BUF) 5860 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5861 #endif 5862 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5863 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5864 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5865 SCTP_M_MCORE); 5866 #endif 5867 (void)SCTP_GETTIME_TIMEVAL(&tv); 5868 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5869 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5870 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5871 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5872 #else 5873 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5874 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5875 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5876 #endif 5877 /* init the empty list of (All) Endpoints */ 5878 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5879 5880 5881 /* init the hash table of endpoints */ 5882 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5883 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5884 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5885 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5886 &SCTP_BASE_INFO(hashasocmark)); 5887 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5888 &SCTP_BASE_INFO(hashmark)); 5889 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5890 &SCTP_BASE_INFO(hashtcpmark)); 5891 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5892 5893 5894 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5895 &SCTP_BASE_INFO(hashvrfmark)); 5896 5897 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5898 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5899 /* init the zones */ 5900 /* 5901 * FIX ME: Should check for NULL returns, but if it does fail we are 5902 * doomed to panic anyways... add later maybe. 5903 */ 5904 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5905 sizeof(struct sctp_inpcb), maxsockets); 5906 5907 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5908 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5909 5910 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5911 sizeof(struct sctp_laddr), 5912 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5913 5914 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5915 sizeof(struct sctp_nets), 5916 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5917 5918 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5919 sizeof(struct sctp_tmit_chunk), 5920 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5921 5922 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5923 sizeof(struct sctp_queued_to_read), 5924 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5925 5926 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5927 sizeof(struct sctp_stream_queue_pending), 5928 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5929 5930 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5931 sizeof(struct sctp_asconf), 5932 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5933 5934 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5935 sizeof(struct sctp_asconf_ack), 5936 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5937 5938 5939 /* Master Lock INIT for info structure */ 5940 SCTP_INP_INFO_LOCK_INIT(); 5941 SCTP_STATLOG_INIT_LOCK(); 5942 5943 SCTP_IPI_COUNT_INIT(); 5944 SCTP_IPI_ADDR_INIT(); 5945 #ifdef SCTP_PACKET_LOGGING 5946 SCTP_IP_PKTLOG_INIT(); 5947 #endif 5948 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5949 5950 SCTP_WQ_ADDR_INIT(); 5951 /* not sure if we need all the counts */ 5952 SCTP_BASE_INFO(ipi_count_ep) = 0; 5953 /* assoc/tcb zone info */ 5954 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5955 /* local addrlist zone info */ 5956 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5957 /* remote addrlist zone info */ 5958 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5959 /* chunk info */ 5960 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5961 5962 /* socket queue zone info */ 5963 SCTP_BASE_INFO(ipi_count_readq) = 0; 5964 5965 /* stream out queue cont */ 5966 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5967 5968 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5969 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5970 5971 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5972 5973 /* Init the TIMEWAIT list */ 5974 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5975 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5976 } 5977 5978 sctp_startup_iterator(); 5979 5980 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5981 sctp_startup_mcore_threads(); 5982 #endif 5983 5984 /* 5985 * INIT the default VRF which for BSD is the only one, other O/S's 5986 * may have more. But initially they must start with one and then 5987 * add the VRF's as addresses are added. 5988 */ 5989 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5990 } 5991 5992 /* 5993 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5994 */ 5995 void 5996 sctp_pcb_finish(void) 5997 { 5998 struct sctp_vrflist *vrf_bucket; 5999 struct sctp_vrf *vrf, *nvrf; 6000 struct sctp_ifn *ifn, *nifn; 6001 struct sctp_ifa *ifa, *nifa; 6002 struct sctpvtaghead *chain; 6003 struct sctp_tagblock *twait_block, *prev_twait_block; 6004 struct sctp_laddr *wi, *nwi; 6005 int i; 6006 6007 /* 6008 * Free BSD the it thread never exits but we do clean up. The only 6009 * way freebsd reaches here if we have VRF's but we still add the 6010 * ifdef to make it compile on old versions. 6011 */ 6012 { 6013 struct sctp_iterator *it, *nit; 6014 6015 SCTP_IPI_ITERATOR_WQ_LOCK(); 6016 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 6017 if (it->vn != curvnet) { 6018 continue; 6019 } 6020 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6021 if (it->function_atend != NULL) { 6022 (*it->function_atend) (it->pointer, it->val); 6023 } 6024 SCTP_FREE(it, SCTP_M_ITER); 6025 } 6026 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6027 SCTP_ITERATOR_LOCK(); 6028 if ((sctp_it_ctl.cur_it) && 6029 (sctp_it_ctl.cur_it->vn == curvnet)) { 6030 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 6031 } 6032 SCTP_ITERATOR_UNLOCK(); 6033 } 6034 6035 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 6036 SCTP_WQ_ADDR_LOCK(); 6037 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 6038 LIST_REMOVE(wi, sctp_nxt_addr); 6039 SCTP_DECR_LADDR_COUNT(); 6040 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 6041 } 6042 SCTP_WQ_ADDR_UNLOCK(); 6043 6044 /* 6045 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 6046 * destroyed first). 6047 */ 6048 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 6049 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 6050 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 6051 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 6052 /* free the ifa */ 6053 LIST_REMOVE(ifa, next_bucket); 6054 LIST_REMOVE(ifa, next_ifa); 6055 SCTP_FREE(ifa, SCTP_M_IFA); 6056 } 6057 /* free the ifn */ 6058 LIST_REMOVE(ifn, next_bucket); 6059 LIST_REMOVE(ifn, next_ifn); 6060 SCTP_FREE(ifn, SCTP_M_IFN); 6061 } 6062 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 6063 /* free the vrf */ 6064 LIST_REMOVE(vrf, next_vrf); 6065 SCTP_FREE(vrf, SCTP_M_VRF); 6066 } 6067 /* free the vrf hashes */ 6068 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6069 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6070 6071 /* 6072 * free the TIMEWAIT list elements malloc'd in the function 6073 * sctp_add_vtag_to_timewait()... 6074 */ 6075 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6076 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6077 if (!LIST_EMPTY(chain)) { 6078 prev_twait_block = NULL; 6079 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6080 if (prev_twait_block) { 6081 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6082 } 6083 prev_twait_block = twait_block; 6084 } 6085 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6086 } 6087 } 6088 6089 /* free the locks and mutexes */ 6090 #ifdef SCTP_PACKET_LOGGING 6091 SCTP_IP_PKTLOG_DESTROY(); 6092 #endif 6093 SCTP_IPI_ADDR_DESTROY(); 6094 SCTP_STATLOG_DESTROY(); 6095 SCTP_INP_INFO_LOCK_DESTROY(); 6096 6097 SCTP_WQ_ADDR_DESTROY(); 6098 6099 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6100 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6101 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6102 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6103 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6104 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6105 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6106 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6107 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6108 /* Get rid of other stuff to */ 6109 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6110 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6111 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6112 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6113 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6114 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6115 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6116 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6117 #endif 6118 } 6119 6120 6121 int 6122 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6123 int iphlen, int offset, int limit, struct sctphdr *sh, 6124 struct sockaddr *altsa) 6125 { 6126 /* 6127 * grub through the INIT pulling addresses and loading them to the 6128 * nets structure in the asoc. The from address in the mbuf should 6129 * also be loaded (if it is not already). This routine can be called 6130 * with either INIT or INIT-ACK's as long as the m points to the IP 6131 * packet and the offset points to the beginning of the parameters. 6132 */ 6133 struct sctp_inpcb *inp, *l_inp; 6134 struct sctp_nets *net, *nnet, *net_tmp; 6135 struct ip *iph; 6136 struct sctp_paramhdr *phdr, parm_buf; 6137 struct sctp_tcb *stcb_tmp; 6138 uint16_t ptype, plen; 6139 struct sockaddr *sa; 6140 struct sockaddr_storage dest_store; 6141 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 6142 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6143 struct sctp_auth_random *p_random = NULL; 6144 uint16_t random_len = 0; 6145 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6146 struct sctp_auth_hmac_algo *hmacs = NULL; 6147 uint16_t hmacs_len = 0; 6148 uint8_t saw_asconf = 0; 6149 uint8_t saw_asconf_ack = 0; 6150 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6151 struct sctp_auth_chunk_list *chunks = NULL; 6152 uint16_t num_chunks = 0; 6153 sctp_key_t *new_key; 6154 uint32_t keylen; 6155 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6156 uint8_t ecn_allowed; 6157 6158 #ifdef INET 6159 struct sockaddr_in sin; 6160 6161 #endif 6162 #ifdef INET6 6163 struct sockaddr_in6 sin6; 6164 6165 #endif 6166 6167 /* First get the destination address setup too. */ 6168 #ifdef INET 6169 memset(&sin, 0, sizeof(sin)); 6170 sin.sin_family = AF_INET; 6171 sin.sin_len = sizeof(sin); 6172 sin.sin_port = stcb->rport; 6173 #endif 6174 #ifdef INET6 6175 memset(&sin6, 0, sizeof(sin6)); 6176 sin6.sin6_family = AF_INET6; 6177 sin6.sin6_len = sizeof(struct sockaddr_in6); 6178 sin6.sin6_port = stcb->rport; 6179 #endif 6180 if (altsa == NULL) { 6181 iph = mtod(m, struct ip *); 6182 switch (iph->ip_v) { 6183 #ifdef INET 6184 case IPVERSION: 6185 { 6186 /* its IPv4 */ 6187 struct sockaddr_in *sin_2; 6188 6189 sin_2 = (struct sockaddr_in *)(local_sa); 6190 memset(sin_2, 0, sizeof(sin)); 6191 sin_2->sin_family = AF_INET; 6192 sin_2->sin_len = sizeof(sin); 6193 sin_2->sin_port = sh->dest_port; 6194 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 6195 sin.sin_addr = iph->ip_src; 6196 sa = (struct sockaddr *)&sin; 6197 break; 6198 } 6199 #endif 6200 #ifdef INET6 6201 case IPV6_VERSION >> 4: 6202 { 6203 /* its IPv6 */ 6204 struct ip6_hdr *ip6; 6205 struct sockaddr_in6 *sin6_2; 6206 6207 ip6 = mtod(m, struct ip6_hdr *); 6208 sin6_2 = (struct sockaddr_in6 *)(local_sa); 6209 memset(sin6_2, 0, sizeof(sin6)); 6210 sin6_2->sin6_family = AF_INET6; 6211 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 6212 sin6_2->sin6_port = sh->dest_port; 6213 sin6.sin6_addr = ip6->ip6_src; 6214 sa = (struct sockaddr *)&sin6; 6215 break; 6216 } 6217 #endif 6218 default: 6219 return (-1); 6220 break; 6221 } 6222 } else { 6223 /* 6224 * For cookies we use the src address NOT from the packet 6225 * but from the original INIT 6226 */ 6227 sa = altsa; 6228 } 6229 /* Turn off ECN until we get through all params */ 6230 ecn_allowed = 0; 6231 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6232 /* mark all addresses that we have currently on the list */ 6233 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6234 } 6235 /* does the source address already exist? if so skip it */ 6236 l_inp = inp = stcb->sctp_ep; 6237 6238 atomic_add_int(&stcb->asoc.refcnt, 1); 6239 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 6240 atomic_add_int(&stcb->asoc.refcnt, -1); 6241 6242 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6243 /* we must add the source address */ 6244 /* no scope set here since we have a tcb already. */ 6245 switch (sa->sa_family) { 6246 #ifdef INET 6247 case AF_INET: 6248 if (stcb->asoc.ipv4_addr_legal) { 6249 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6250 return (-1); 6251 } 6252 } 6253 break; 6254 #endif 6255 #ifdef INET6 6256 case AF_INET6: 6257 if (stcb->asoc.ipv6_addr_legal) { 6258 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6259 return (-2); 6260 } 6261 } 6262 break; 6263 #endif 6264 default: 6265 break; 6266 } 6267 } else { 6268 if (net_tmp != NULL && stcb_tmp == stcb) { 6269 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6270 } else if (stcb_tmp != stcb) { 6271 /* It belongs to another association? */ 6272 if (stcb_tmp) 6273 SCTP_TCB_UNLOCK(stcb_tmp); 6274 return (-3); 6275 } 6276 } 6277 if (stcb->asoc.state == 0) { 6278 /* the assoc was freed? */ 6279 return (-4); 6280 } 6281 /* 6282 * peer must explicitly turn this on. This may have been initialized 6283 * to be "on" in order to allow local addr changes while INIT's are 6284 * in flight. 6285 */ 6286 stcb->asoc.peer_supports_asconf = 0; 6287 /* now we must go through each of the params. */ 6288 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6289 while (phdr) { 6290 ptype = ntohs(phdr->param_type); 6291 plen = ntohs(phdr->param_length); 6292 /* 6293 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 6294 * (int)plen); 6295 */ 6296 if (offset + plen > limit) { 6297 break; 6298 } 6299 if (plen == 0) { 6300 break; 6301 } 6302 #ifdef INET 6303 if (ptype == SCTP_IPV4_ADDRESS) { 6304 if (stcb->asoc.ipv4_addr_legal) { 6305 struct sctp_ipv4addr_param *p4, p4_buf; 6306 6307 /* ok get the v4 address and check/add */ 6308 phdr = sctp_get_next_param(m, offset, 6309 (struct sctp_paramhdr *)&p4_buf, 6310 sizeof(p4_buf)); 6311 if (plen != sizeof(struct sctp_ipv4addr_param) || 6312 phdr == NULL) { 6313 return (-5); 6314 } 6315 p4 = (struct sctp_ipv4addr_param *)phdr; 6316 sin.sin_addr.s_addr = p4->addr; 6317 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6318 /* Skip multi-cast addresses */ 6319 goto next_param; 6320 } 6321 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6322 (sin.sin_addr.s_addr == INADDR_ANY)) { 6323 goto next_param; 6324 } 6325 sa = (struct sockaddr *)&sin; 6326 inp = stcb->sctp_ep; 6327 atomic_add_int(&stcb->asoc.refcnt, 1); 6328 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6329 local_sa, stcb); 6330 atomic_add_int(&stcb->asoc.refcnt, -1); 6331 6332 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6333 inp == NULL) { 6334 /* we must add the source address */ 6335 /* 6336 * no scope set since we have a tcb 6337 * already 6338 */ 6339 6340 /* 6341 * we must validate the state again 6342 * here 6343 */ 6344 add_it_now: 6345 if (stcb->asoc.state == 0) { 6346 /* the assoc was freed? */ 6347 return (-7); 6348 } 6349 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6350 return (-8); 6351 } 6352 } else if (stcb_tmp == stcb) { 6353 if (stcb->asoc.state == 0) { 6354 /* the assoc was freed? */ 6355 return (-10); 6356 } 6357 if (net != NULL) { 6358 /* clear flag */ 6359 net->dest_state &= 6360 ~SCTP_ADDR_NOT_IN_ASSOC; 6361 } 6362 } else { 6363 /* 6364 * strange, address is in another 6365 * assoc? straighten out locks. 6366 */ 6367 if (stcb_tmp) { 6368 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6369 /* 6370 * in setup state we 6371 * abort this guy 6372 */ 6373 sctp_abort_an_association(stcb_tmp->sctp_ep, 6374 stcb_tmp, 1, NULL, 0); 6375 goto add_it_now; 6376 } 6377 SCTP_TCB_UNLOCK(stcb_tmp); 6378 } 6379 if (stcb->asoc.state == 0) { 6380 /* the assoc was freed? */ 6381 return (-12); 6382 } 6383 return (-13); 6384 } 6385 } 6386 } else 6387 #endif 6388 #ifdef INET6 6389 if (ptype == SCTP_IPV6_ADDRESS) { 6390 if (stcb->asoc.ipv6_addr_legal) { 6391 /* ok get the v6 address and check/add */ 6392 struct sctp_ipv6addr_param *p6, p6_buf; 6393 6394 phdr = sctp_get_next_param(m, offset, 6395 (struct sctp_paramhdr *)&p6_buf, 6396 sizeof(p6_buf)); 6397 if (plen != sizeof(struct sctp_ipv6addr_param) || 6398 phdr == NULL) { 6399 return (-14); 6400 } 6401 p6 = (struct sctp_ipv6addr_param *)phdr; 6402 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6403 sizeof(p6->addr)); 6404 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6405 /* Skip multi-cast addresses */ 6406 goto next_param; 6407 } 6408 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6409 /* 6410 * Link local make no sense without 6411 * scope 6412 */ 6413 goto next_param; 6414 } 6415 sa = (struct sockaddr *)&sin6; 6416 inp = stcb->sctp_ep; 6417 atomic_add_int(&stcb->asoc.refcnt, 1); 6418 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6419 local_sa, stcb); 6420 atomic_add_int(&stcb->asoc.refcnt, -1); 6421 if (stcb_tmp == NULL && 6422 (inp == stcb->sctp_ep || inp == NULL)) { 6423 /* 6424 * we must validate the state again 6425 * here 6426 */ 6427 add_it_now6: 6428 if (stcb->asoc.state == 0) { 6429 /* the assoc was freed? */ 6430 return (-16); 6431 } 6432 /* 6433 * we must add the address, no scope 6434 * set 6435 */ 6436 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6437 return (-17); 6438 } 6439 } else if (stcb_tmp == stcb) { 6440 /* 6441 * we must validate the state again 6442 * here 6443 */ 6444 if (stcb->asoc.state == 0) { 6445 /* the assoc was freed? */ 6446 return (-19); 6447 } 6448 if (net != NULL) { 6449 /* clear flag */ 6450 net->dest_state &= 6451 ~SCTP_ADDR_NOT_IN_ASSOC; 6452 } 6453 } else { 6454 /* 6455 * strange, address is in another 6456 * assoc? straighten out locks. 6457 */ 6458 if (stcb_tmp) 6459 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6460 /* 6461 * in setup state we 6462 * abort this guy 6463 */ 6464 sctp_abort_an_association(stcb_tmp->sctp_ep, 6465 stcb_tmp, 1, NULL, 0); 6466 goto add_it_now6; 6467 } 6468 SCTP_TCB_UNLOCK(stcb_tmp); 6469 6470 if (stcb->asoc.state == 0) { 6471 /* the assoc was freed? */ 6472 return (-21); 6473 } 6474 return (-22); 6475 } 6476 } 6477 } else 6478 #endif 6479 if (ptype == SCTP_ECN_CAPABLE) { 6480 ecn_allowed = 1; 6481 } else if (ptype == SCTP_ULP_ADAPTATION) { 6482 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6483 struct sctp_adaptation_layer_indication ai, 6484 *aip; 6485 6486 phdr = sctp_get_next_param(m, offset, 6487 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6488 aip = (struct sctp_adaptation_layer_indication *)phdr; 6489 if (aip) { 6490 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6491 stcb->asoc.adaptation_needed = 1; 6492 } 6493 } 6494 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6495 struct sctp_asconf_addr_param lstore, *fee; 6496 int lptype; 6497 struct sockaddr *lsa = NULL; 6498 6499 #ifdef INET 6500 struct sctp_asconf_addrv4_param *fii; 6501 6502 #endif 6503 6504 stcb->asoc.peer_supports_asconf = 1; 6505 if (plen > sizeof(lstore)) { 6506 return (-23); 6507 } 6508 phdr = sctp_get_next_param(m, offset, 6509 (struct sctp_paramhdr *)&lstore, 6510 min(plen, sizeof(lstore))); 6511 if (phdr == NULL) { 6512 return (-24); 6513 } 6514 fee = (struct sctp_asconf_addr_param *)phdr; 6515 lptype = ntohs(fee->addrp.ph.param_type); 6516 switch (lptype) { 6517 #ifdef INET 6518 case SCTP_IPV4_ADDRESS: 6519 if (plen != 6520 sizeof(struct sctp_asconf_addrv4_param)) { 6521 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6522 (int)sizeof(struct sctp_asconf_addrv4_param), 6523 plen); 6524 } else { 6525 fii = (struct sctp_asconf_addrv4_param *)fee; 6526 sin.sin_addr.s_addr = fii->addrp.addr; 6527 lsa = (struct sockaddr *)&sin; 6528 } 6529 break; 6530 #endif 6531 #ifdef INET6 6532 case SCTP_IPV6_ADDRESS: 6533 if (plen != 6534 sizeof(struct sctp_asconf_addr_param)) { 6535 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6536 (int)sizeof(struct sctp_asconf_addr_param), 6537 plen); 6538 } else { 6539 memcpy(sin6.sin6_addr.s6_addr, 6540 fee->addrp.addr, 6541 sizeof(fee->addrp.addr)); 6542 lsa = (struct sockaddr *)&sin6; 6543 } 6544 break; 6545 #endif 6546 default: 6547 break; 6548 } 6549 if (lsa) { 6550 (void)sctp_set_primary_addr(stcb, sa, NULL); 6551 } 6552 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6553 stcb->asoc.peer_supports_nat = 1; 6554 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6555 /* Peer supports pr-sctp */ 6556 stcb->asoc.peer_supports_prsctp = 1; 6557 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6558 /* A supported extension chunk */ 6559 struct sctp_supported_chunk_types_param *pr_supported; 6560 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6561 int num_ent, i; 6562 6563 phdr = sctp_get_next_param(m, offset, 6564 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6565 if (phdr == NULL) { 6566 return (-25); 6567 } 6568 stcb->asoc.peer_supports_asconf = 0; 6569 stcb->asoc.peer_supports_prsctp = 0; 6570 stcb->asoc.peer_supports_pktdrop = 0; 6571 stcb->asoc.peer_supports_strreset = 0; 6572 stcb->asoc.peer_supports_nr_sack = 0; 6573 stcb->asoc.peer_supports_auth = 0; 6574 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6575 num_ent = plen - sizeof(struct sctp_paramhdr); 6576 for (i = 0; i < num_ent; i++) { 6577 switch (pr_supported->chunk_types[i]) { 6578 case SCTP_ASCONF: 6579 case SCTP_ASCONF_ACK: 6580 stcb->asoc.peer_supports_asconf = 1; 6581 break; 6582 case SCTP_FORWARD_CUM_TSN: 6583 stcb->asoc.peer_supports_prsctp = 1; 6584 break; 6585 case SCTP_PACKET_DROPPED: 6586 stcb->asoc.peer_supports_pktdrop = 1; 6587 break; 6588 case SCTP_NR_SELECTIVE_ACK: 6589 stcb->asoc.peer_supports_nr_sack = 1; 6590 break; 6591 case SCTP_STREAM_RESET: 6592 stcb->asoc.peer_supports_strreset = 1; 6593 break; 6594 case SCTP_AUTHENTICATION: 6595 stcb->asoc.peer_supports_auth = 1; 6596 break; 6597 default: 6598 /* one I have not learned yet */ 6599 break; 6600 6601 } 6602 } 6603 } else if (ptype == SCTP_RANDOM) { 6604 if (plen > sizeof(random_store)) 6605 break; 6606 if (got_random) { 6607 /* already processed a RANDOM */ 6608 goto next_param; 6609 } 6610 phdr = sctp_get_next_param(m, offset, 6611 (struct sctp_paramhdr *)random_store, 6612 min(sizeof(random_store), plen)); 6613 if (phdr == NULL) 6614 return (-26); 6615 p_random = (struct sctp_auth_random *)phdr; 6616 random_len = plen - sizeof(*p_random); 6617 /* enforce the random length */ 6618 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6619 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6620 return (-27); 6621 } 6622 got_random = 1; 6623 } else if (ptype == SCTP_HMAC_LIST) { 6624 int num_hmacs; 6625 int i; 6626 6627 if (plen > sizeof(hmacs_store)) 6628 break; 6629 if (got_hmacs) { 6630 /* already processed a HMAC list */ 6631 goto next_param; 6632 } 6633 phdr = sctp_get_next_param(m, offset, 6634 (struct sctp_paramhdr *)hmacs_store, 6635 min(plen, sizeof(hmacs_store))); 6636 if (phdr == NULL) 6637 return (-28); 6638 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6639 hmacs_len = plen - sizeof(*hmacs); 6640 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6641 /* validate the hmac list */ 6642 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6643 return (-29); 6644 } 6645 if (stcb->asoc.peer_hmacs != NULL) 6646 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6647 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6648 if (stcb->asoc.peer_hmacs != NULL) { 6649 for (i = 0; i < num_hmacs; i++) { 6650 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6651 ntohs(hmacs->hmac_ids[i])); 6652 } 6653 } 6654 got_hmacs = 1; 6655 } else if (ptype == SCTP_CHUNK_LIST) { 6656 int i; 6657 6658 if (plen > sizeof(chunks_store)) 6659 break; 6660 if (got_chklist) { 6661 /* already processed a Chunks list */ 6662 goto next_param; 6663 } 6664 phdr = sctp_get_next_param(m, offset, 6665 (struct sctp_paramhdr *)chunks_store, 6666 min(plen, sizeof(chunks_store))); 6667 if (phdr == NULL) 6668 return (-30); 6669 chunks = (struct sctp_auth_chunk_list *)phdr; 6670 num_chunks = plen - sizeof(*chunks); 6671 if (stcb->asoc.peer_auth_chunks != NULL) 6672 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6673 else 6674 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6675 for (i = 0; i < num_chunks; i++) { 6676 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6677 stcb->asoc.peer_auth_chunks); 6678 /* record asconf/asconf-ack if listed */ 6679 if (chunks->chunk_types[i] == SCTP_ASCONF) 6680 saw_asconf = 1; 6681 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6682 saw_asconf_ack = 1; 6683 6684 } 6685 got_chklist = 1; 6686 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6687 (ptype == SCTP_STATE_COOKIE) || 6688 (ptype == SCTP_UNRECOG_PARAM) || 6689 (ptype == SCTP_COOKIE_PRESERVE) || 6690 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6691 (ptype == SCTP_ADD_IP_ADDRESS) || 6692 (ptype == SCTP_DEL_IP_ADDRESS) || 6693 (ptype == SCTP_ERROR_CAUSE_IND) || 6694 (ptype == SCTP_SUCCESS_REPORT)) { 6695 /* don't care */ ; 6696 } else { 6697 if ((ptype & 0x8000) == 0x0000) { 6698 /* 6699 * must stop processing the rest of the 6700 * param's. Any report bits were handled 6701 * with the call to 6702 * sctp_arethere_unrecognized_parameters() 6703 * when the INIT or INIT-ACK was first seen. 6704 */ 6705 break; 6706 } 6707 } 6708 6709 next_param: 6710 offset += SCTP_SIZE32(plen); 6711 if (offset >= limit) { 6712 break; 6713 } 6714 phdr = sctp_get_next_param(m, offset, &parm_buf, 6715 sizeof(parm_buf)); 6716 } 6717 /* Now check to see if we need to purge any addresses */ 6718 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6719 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6720 SCTP_ADDR_NOT_IN_ASSOC) { 6721 /* This address has been removed from the asoc */ 6722 /* remove and free it */ 6723 stcb->asoc.numnets--; 6724 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6725 sctp_free_remote_addr(net); 6726 if (net == stcb->asoc.primary_destination) { 6727 stcb->asoc.primary_destination = NULL; 6728 sctp_select_primary_destination(stcb); 6729 } 6730 } 6731 } 6732 if (ecn_allowed == 0) { 6733 stcb->asoc.ecn_allowed = 0; 6734 } 6735 /* validate authentication required parameters */ 6736 if (got_random && got_hmacs) { 6737 stcb->asoc.peer_supports_auth = 1; 6738 } else { 6739 stcb->asoc.peer_supports_auth = 0; 6740 } 6741 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6742 /* peer does not support auth but sent a chunks list? */ 6743 return (-31); 6744 } 6745 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6746 !stcb->asoc.peer_supports_auth) { 6747 /* peer supports asconf but not auth? */ 6748 return (-32); 6749 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6750 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6751 return (-33); 6752 } 6753 /* concatenate the full random key */ 6754 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6755 if (chunks != NULL) { 6756 keylen += sizeof(*chunks) + num_chunks; 6757 } 6758 new_key = sctp_alloc_key(keylen); 6759 if (new_key != NULL) { 6760 /* copy in the RANDOM */ 6761 if (p_random != NULL) { 6762 keylen = sizeof(*p_random) + random_len; 6763 bcopy(p_random, new_key->key, keylen); 6764 } 6765 /* append in the AUTH chunks */ 6766 if (chunks != NULL) { 6767 bcopy(chunks, new_key->key + keylen, 6768 sizeof(*chunks) + num_chunks); 6769 keylen += sizeof(*chunks) + num_chunks; 6770 } 6771 /* append in the HMACs */ 6772 if (hmacs != NULL) { 6773 bcopy(hmacs, new_key->key + keylen, 6774 sizeof(*hmacs) + hmacs_len); 6775 } 6776 } else { 6777 /* failed to get memory for the key */ 6778 return (-34); 6779 } 6780 if (stcb->asoc.authinfo.peer_random != NULL) 6781 sctp_free_key(stcb->asoc.authinfo.peer_random); 6782 stcb->asoc.authinfo.peer_random = new_key; 6783 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6784 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6785 6786 return (0); 6787 } 6788 6789 int 6790 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6791 struct sctp_nets *net) 6792 { 6793 /* make sure the requested primary address exists in the assoc */ 6794 if (net == NULL && sa) 6795 net = sctp_findnet(stcb, sa); 6796 6797 if (net == NULL) { 6798 /* didn't find the requested primary address! */ 6799 return (-1); 6800 } else { 6801 /* set the primary address */ 6802 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6803 /* Must be confirmed, so queue to set */ 6804 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6805 return (0); 6806 } 6807 stcb->asoc.primary_destination = net; 6808 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6809 sctp_free_remote_addr(stcb->asoc.alternate); 6810 stcb->asoc.alternate = NULL; 6811 } 6812 net = TAILQ_FIRST(&stcb->asoc.nets); 6813 if (net != stcb->asoc.primary_destination) { 6814 /* 6815 * first one on the list is NOT the primary 6816 * sctp_cmpaddr() is much more efficient if the 6817 * primary is the first on the list, make it so. 6818 */ 6819 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6820 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6821 } 6822 return (0); 6823 } 6824 } 6825 6826 int 6827 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6828 { 6829 /* 6830 * This function serves two purposes. It will see if a TAG can be 6831 * re-used and return 1 for yes it is ok and 0 for don't use that 6832 * tag. A secondary function it will do is purge out old tags that 6833 * can be removed. 6834 */ 6835 struct sctpvtaghead *chain; 6836 struct sctp_tagblock *twait_block; 6837 struct sctpasochead *head; 6838 struct sctp_tcb *stcb; 6839 int i; 6840 6841 SCTP_INP_INFO_RLOCK(); 6842 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6843 SCTP_BASE_INFO(hashasocmark))]; 6844 if (head == NULL) { 6845 /* invalid vtag */ 6846 goto skip_vtag_check; 6847 } 6848 LIST_FOREACH(stcb, head, sctp_asocs) { 6849 /* 6850 * We choose not to lock anything here. TCB's can't be 6851 * removed since we have the read lock, so they can't be 6852 * freed on us, same thing for the INP. I may be wrong with 6853 * this assumption, but we will go with it for now :-) 6854 */ 6855 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6856 continue; 6857 } 6858 if (stcb->asoc.my_vtag == tag) { 6859 /* candidate */ 6860 if (stcb->rport != rport) { 6861 continue; 6862 } 6863 if (stcb->sctp_ep->sctp_lport != lport) { 6864 continue; 6865 } 6866 /* Its a used tag set */ 6867 SCTP_INP_INFO_RUNLOCK(); 6868 return (0); 6869 } 6870 } 6871 skip_vtag_check: 6872 6873 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6874 /* Now what about timed wait ? */ 6875 if (!LIST_EMPTY(chain)) { 6876 /* 6877 * Block(s) are present, lets see if we have this tag in the 6878 * list 6879 */ 6880 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6881 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6882 if (twait_block->vtag_block[i].v_tag == 0) { 6883 /* not used */ 6884 continue; 6885 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6886 now->tv_sec) { 6887 /* Audit expires this guy */ 6888 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6889 twait_block->vtag_block[i].v_tag = 0; 6890 twait_block->vtag_block[i].lport = 0; 6891 twait_block->vtag_block[i].rport = 0; 6892 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6893 (twait_block->vtag_block[i].lport == lport) && 6894 (twait_block->vtag_block[i].rport == rport)) { 6895 /* Bad tag, sorry :< */ 6896 SCTP_INP_INFO_RUNLOCK(); 6897 return (0); 6898 } 6899 } 6900 } 6901 } 6902 SCTP_INP_INFO_RUNLOCK(); 6903 return (1); 6904 } 6905 6906 6907 static sctp_assoc_t reneged_asoc_ids[256]; 6908 static uint8_t reneged_at = 0; 6909 6910 6911 static void 6912 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6913 { 6914 /* 6915 * We must hunt this association for MBUF's past the cumack (i.e. 6916 * out of order data that we can renege on). 6917 */ 6918 struct sctp_association *asoc; 6919 struct sctp_tmit_chunk *chk, *nchk; 6920 uint32_t cumulative_tsn_p1; 6921 struct sctp_queued_to_read *ctl, *nctl; 6922 int cnt, strmat; 6923 uint32_t gap, i; 6924 int fnd = 0; 6925 6926 /* We look for anything larger than the cum-ack + 1 */ 6927 6928 asoc = &stcb->asoc; 6929 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6930 /* none we can reneg on. */ 6931 return; 6932 } 6933 SCTP_STAT_INCR(sctps_protocol_drains_done); 6934 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6935 cnt = 0; 6936 /* First look in the re-assembly queue */ 6937 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6938 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6939 /* Yep it is above cum-ack */ 6940 cnt++; 6941 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6942 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6943 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6944 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6945 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6946 if (chk->data) { 6947 sctp_m_freem(chk->data); 6948 chk->data = NULL; 6949 } 6950 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6951 } 6952 } 6953 /* Ok that was fun, now we will drain all the inbound streams? */ 6954 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6955 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6956 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6957 /* Yep it is above cum-ack */ 6958 cnt++; 6959 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6960 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6961 sctp_ucount_decr(asoc->cnt_on_all_streams); 6962 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6963 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6964 if (ctl->data) { 6965 sctp_m_freem(ctl->data); 6966 ctl->data = NULL; 6967 } 6968 sctp_free_remote_addr(ctl->whoFrom); 6969 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6970 SCTP_DECR_READQ_COUNT(); 6971 } 6972 } 6973 } 6974 if (cnt) { 6975 /* We must back down to see what the new highest is */ 6976 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6977 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6978 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6979 asoc->highest_tsn_inside_map = i; 6980 fnd = 1; 6981 break; 6982 } 6983 } 6984 if (!fnd) { 6985 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6986 } 6987 /* 6988 * Question, should we go through the delivery queue? The 6989 * only reason things are on here is the app not reading OR 6990 * a p-d-api up. An attacker COULD send enough in to 6991 * initiate the PD-API and then send a bunch of stuff to 6992 * other streams... these would wind up on the delivery 6993 * queue.. and then we would not get to them. But in order 6994 * to do this I then have to back-track and un-deliver 6995 * sequence numbers in streams.. el-yucko. I think for now 6996 * we will NOT look at the delivery queue and leave it to be 6997 * something to consider later. An alternative would be to 6998 * abort the P-D-API with a notification and then deliver 6999 * the data.... Or another method might be to keep track of 7000 * how many times the situation occurs and if we see a 7001 * possible attack underway just abort the association. 7002 */ 7003 #ifdef SCTP_DEBUG 7004 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 7005 #endif 7006 /* 7007 * Now do we need to find a new 7008 * asoc->highest_tsn_inside_map? 7009 */ 7010 asoc->last_revoke_count = cnt; 7011 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 7012 /* sa_ignore NO_NULL_CHK */ 7013 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 7014 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 7015 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 7016 reneged_at++; 7017 } 7018 /* 7019 * Another issue, in un-setting the TSN's in the mapping array we 7020 * DID NOT adjust the highest_tsn marker. This will cause one of 7021 * two things to occur. It may cause us to do extra work in checking 7022 * for our mapping array movement. More importantly it may cause us 7023 * to SACK every datagram. This may not be a bad thing though since 7024 * we will recover once we get our cum-ack above and all this stuff 7025 * we dumped recovered. 7026 */ 7027 } 7028 7029 void 7030 sctp_drain() 7031 { 7032 /* 7033 * We must walk the PCB lists for ALL associations here. The system 7034 * is LOW on MBUF's and needs help. This is where reneging will 7035 * occur. We really hope this does NOT happen! 7036 */ 7037 VNET_ITERATOR_DECL(vnet_iter); 7038 VNET_LIST_RLOCK_NOSLEEP(); 7039 VNET_FOREACH(vnet_iter) { 7040 CURVNET_SET(vnet_iter); 7041 struct sctp_inpcb *inp; 7042 struct sctp_tcb *stcb; 7043 7044 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7045 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7046 #ifdef VIMAGE 7047 continue; 7048 #else 7049 return; 7050 #endif 7051 } 7052 SCTP_INP_INFO_RLOCK(); 7053 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7054 /* For each endpoint */ 7055 SCTP_INP_RLOCK(inp); 7056 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7057 /* For each association */ 7058 SCTP_TCB_LOCK(stcb); 7059 sctp_drain_mbufs(inp, stcb); 7060 SCTP_TCB_UNLOCK(stcb); 7061 } 7062 SCTP_INP_RUNLOCK(inp); 7063 } 7064 SCTP_INP_INFO_RUNLOCK(); 7065 CURVNET_RESTORE(); 7066 } 7067 VNET_LIST_RUNLOCK_NOSLEEP(); 7068 } 7069 7070 /* 7071 * start a new iterator 7072 * iterates through all endpoints and associations based on the pcb_state 7073 * flags and asoc_state. "af" (mandatory) is executed for all matching 7074 * assocs and "ef" (optional) is executed when the iterator completes. 7075 * "inpf" (optional) is executed for each new endpoint as it is being 7076 * iterated through. inpe (optional) is called when the inp completes 7077 * its way through all the stcbs. 7078 */ 7079 int 7080 sctp_initiate_iterator(inp_func inpf, 7081 asoc_func af, 7082 inp_func inpe, 7083 uint32_t pcb_state, 7084 uint32_t pcb_features, 7085 uint32_t asoc_state, 7086 void *argp, 7087 uint32_t argi, 7088 end_func ef, 7089 struct sctp_inpcb *s_inp, 7090 uint8_t chunk_output_off) 7091 { 7092 struct sctp_iterator *it = NULL; 7093 7094 if (af == NULL) { 7095 return (-1); 7096 } 7097 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7098 SCTP_M_ITER); 7099 if (it == NULL) { 7100 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7101 return (ENOMEM); 7102 } 7103 memset(it, 0, sizeof(*it)); 7104 it->function_assoc = af; 7105 it->function_inp = inpf; 7106 if (inpf) 7107 it->done_current_ep = 0; 7108 else 7109 it->done_current_ep = 1; 7110 it->function_atend = ef; 7111 it->pointer = argp; 7112 it->val = argi; 7113 it->pcb_flags = pcb_state; 7114 it->pcb_features = pcb_features; 7115 it->asoc_state = asoc_state; 7116 it->function_inp_end = inpe; 7117 it->no_chunk_output = chunk_output_off; 7118 it->vn = curvnet; 7119 if (s_inp) { 7120 /* Assume lock is held here */ 7121 it->inp = s_inp; 7122 SCTP_INP_INCR_REF(it->inp); 7123 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7124 } else { 7125 SCTP_INP_INFO_RLOCK(); 7126 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7127 if (it->inp) { 7128 SCTP_INP_INCR_REF(it->inp); 7129 } 7130 SCTP_INP_INFO_RUNLOCK(); 7131 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7132 7133 } 7134 SCTP_IPI_ITERATOR_WQ_LOCK(); 7135 7136 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7137 if (sctp_it_ctl.iterator_running == 0) { 7138 sctp_wakeup_iterator(); 7139 } 7140 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7141 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7142 return (0); 7143 } 7144