1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 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 #if defined(INET) || defined(INET6) 52 #include <netinet/udp.h> 53 #endif 54 #ifdef INET6 55 #include <netinet6/ip6_var.h> 56 #endif 57 #include <sys/sched.h> 58 #include <sys/smp.h> 59 #include <sys/unistd.h> 60 61 62 VNET_DEFINE(struct sctp_base_info, system_base_info); 63 64 /* FIX: we don't handle multiple link local scopes */ 65 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 66 #ifdef INET6 67 int 68 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 69 { 70 struct sockaddr_in6 tmp_a, tmp_b; 71 72 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 77 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 78 return (0); 79 } 80 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 81 } 82 #endif 83 84 void 85 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 86 { 87 /* 88 * We really don't need to lock this, but I will just because it 89 * does not hurt. 90 */ 91 SCTP_INP_INFO_RLOCK(); 92 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 93 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 94 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 95 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 96 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 97 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 98 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 99 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 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 struct sctp_vrf * 220 sctp_find_vrf(uint32_t vrf_id) 221 { 222 struct sctp_vrflist *bucket; 223 struct sctp_vrf *liste; 224 225 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 226 LIST_FOREACH(liste, bucket, next_vrf) { 227 if (vrf_id == liste->vrf_id) { 228 return (liste); 229 } 230 } 231 return (NULL); 232 } 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 } 249 250 251 void 252 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 253 { 254 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 255 /* We zero'd the count */ 256 if (sctp_ifnp->vrf) { 257 sctp_free_vrf(sctp_ifnp->vrf); 258 } 259 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 260 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 261 } 262 } 263 264 265 void 266 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 267 { 268 struct sctp_ifn *sctp_ifnp; 269 270 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 271 if (sctp_ifnp != NULL) { 272 sctp_ifnp->ifn_mtu = mtu; 273 } 274 } 275 276 277 void 278 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 279 { 280 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 281 /* We zero'd the count */ 282 if (sctp_ifap->ifn_p) { 283 sctp_free_ifn(sctp_ifap->ifn_p); 284 } 285 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 286 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 287 } 288 } 289 290 291 static void 292 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 293 { 294 struct sctp_ifn *found; 295 296 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 297 if (found == NULL) { 298 /* Not in the list.. sorry */ 299 return; 300 } 301 if (hold_addr_lock == 0) 302 SCTP_IPI_ADDR_WLOCK(); 303 LIST_REMOVE(sctp_ifnp, next_bucket); 304 LIST_REMOVE(sctp_ifnp, next_ifn); 305 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 306 sctp_ifnp->registered_af); 307 if (hold_addr_lock == 0) 308 SCTP_IPI_ADDR_WUNLOCK(); 309 /* Take away the reference, and possibly free it */ 310 sctp_free_ifn(sctp_ifnp); 311 } 312 313 314 void 315 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 316 const char *if_name, uint32_t ifn_index) 317 { 318 struct sctp_vrf *vrf; 319 struct sctp_ifa *sctp_ifap; 320 321 SCTP_IPI_ADDR_RLOCK(); 322 vrf = sctp_find_vrf(vrf_id); 323 if (vrf == NULL) { 324 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 325 goto out; 326 327 } 328 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 329 if (sctp_ifap == NULL) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 331 goto out; 332 } 333 if (sctp_ifap->ifn_p == NULL) { 334 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 335 goto out; 336 } 337 if (if_name) { 338 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 339 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 340 sctp_ifap->ifn_p->ifn_name, if_name); 341 goto out; 342 } 343 } else { 344 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 345 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 346 sctp_ifap->ifn_p->ifn_index, ifn_index); 347 goto out; 348 } 349 } 350 351 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 352 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 353 out: 354 SCTP_IPI_ADDR_RUNLOCK(); 355 } 356 357 358 void 359 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 360 const char *if_name, uint32_t ifn_index) 361 { 362 struct sctp_vrf *vrf; 363 struct sctp_ifa *sctp_ifap; 364 365 SCTP_IPI_ADDR_RLOCK(); 366 vrf = sctp_find_vrf(vrf_id); 367 if (vrf == NULL) { 368 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 369 goto out; 370 371 } 372 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 373 if (sctp_ifap == NULL) { 374 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 375 goto out; 376 } 377 if (sctp_ifap->ifn_p == NULL) { 378 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 379 goto out; 380 } 381 if (if_name) { 382 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 383 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 384 sctp_ifap->ifn_p->ifn_name, if_name); 385 goto out; 386 } 387 } else { 388 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 389 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 390 sctp_ifap->ifn_p->ifn_index, ifn_index); 391 goto out; 392 } 393 } 394 395 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 396 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 397 out: 398 SCTP_IPI_ADDR_RUNLOCK(); 399 } 400 401 402 /*- 403 * Add an ifa to an ifn. 404 * Register the interface as necessary. 405 * NOTE: ADDR write lock MUST be held. 406 */ 407 static void 408 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 409 { 410 int ifa_af; 411 412 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 413 sctp_ifap->ifn_p = sctp_ifnp; 414 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 415 /* update address counts */ 416 sctp_ifnp->ifa_count++; 417 ifa_af = sctp_ifap->address.sa.sa_family; 418 switch (ifa_af) { 419 #ifdef INET 420 case AF_INET: 421 sctp_ifnp->num_v4++; 422 break; 423 #endif 424 #ifdef INET6 425 case AF_INET6: 426 sctp_ifnp->num_v6++; 427 break; 428 #endif 429 default: 430 break; 431 } 432 if (sctp_ifnp->ifa_count == 1) { 433 /* register the new interface */ 434 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 435 sctp_ifnp->registered_af = ifa_af; 436 } 437 } 438 439 440 /*- 441 * Remove an ifa from its ifn. 442 * If no more addresses exist, remove the ifn too. Otherwise, re-register 443 * the interface based on the remaining address families left. 444 * NOTE: ADDR write lock MUST be held. 445 */ 446 static void 447 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 448 { 449 LIST_REMOVE(sctp_ifap, next_ifa); 450 if (sctp_ifap->ifn_p) { 451 /* update address counts */ 452 sctp_ifap->ifn_p->ifa_count--; 453 switch (sctp_ifap->address.sa.sa_family) { 454 #ifdef INET 455 case AF_INET: 456 sctp_ifap->ifn_p->num_v4--; 457 break; 458 #endif 459 #ifdef INET6 460 case AF_INET6: 461 sctp_ifap->ifn_p->num_v6--; 462 break; 463 #endif 464 default: 465 break; 466 } 467 468 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 469 /* remove the ifn, possibly freeing it */ 470 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 471 } else { 472 /* re-register address family type, if needed */ 473 if ((sctp_ifap->ifn_p->num_v6 == 0) && 474 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 475 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 476 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 477 sctp_ifap->ifn_p->registered_af = AF_INET; 478 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 479 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 480 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 481 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 482 sctp_ifap->ifn_p->registered_af = AF_INET6; 483 } 484 /* free the ifn refcount */ 485 sctp_free_ifn(sctp_ifap->ifn_p); 486 } 487 sctp_ifap->ifn_p = NULL; 488 } 489 } 490 491 492 struct sctp_ifa * 493 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 494 uint32_t ifn_type, const char *if_name, void *ifa, 495 struct sockaddr *addr, uint32_t ifa_flags, 496 int dynamic_add) 497 { 498 struct sctp_vrf *vrf; 499 struct sctp_ifn *sctp_ifnp = NULL; 500 struct sctp_ifa *sctp_ifap = NULL; 501 struct sctp_ifalist *hash_addr_head; 502 struct sctp_ifnlist *hash_ifn_head; 503 uint32_t hash_of_addr; 504 int new_ifn_af = 0; 505 506 #ifdef SCTP_DEBUG 507 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 508 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 509 #endif 510 SCTP_IPI_ADDR_WLOCK(); 511 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 512 if (sctp_ifnp) { 513 vrf = sctp_ifnp->vrf; 514 } else { 515 vrf = sctp_find_vrf(vrf_id); 516 if (vrf == NULL) { 517 vrf = sctp_allocate_vrf(vrf_id); 518 if (vrf == NULL) { 519 SCTP_IPI_ADDR_WUNLOCK(); 520 return (NULL); 521 } 522 } 523 } 524 if (sctp_ifnp == NULL) { 525 /* 526 * build one and add it, can't hold lock until after malloc 527 * done though. 528 */ 529 SCTP_IPI_ADDR_WUNLOCK(); 530 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 531 sizeof(struct sctp_ifn), SCTP_M_IFN); 532 if (sctp_ifnp == NULL) { 533 #ifdef INVARIANTS 534 panic("No memory for IFN"); 535 #endif 536 return (NULL); 537 } 538 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 539 sctp_ifnp->ifn_index = ifn_index; 540 sctp_ifnp->ifn_p = ifn; 541 sctp_ifnp->ifn_type = ifn_type; 542 sctp_ifnp->refcount = 0; 543 sctp_ifnp->vrf = vrf; 544 atomic_add_int(&vrf->refcount, 1); 545 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 546 if (if_name != NULL) { 547 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 548 } else { 549 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 550 } 551 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 552 LIST_INIT(&sctp_ifnp->ifalist); 553 SCTP_IPI_ADDR_WLOCK(); 554 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 555 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 556 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 557 new_ifn_af = 1; 558 } 559 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 560 if (sctp_ifap) { 561 /* Hmm, it already exists? */ 562 if ((sctp_ifap->ifn_p) && 563 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 564 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 565 sctp_ifap->ifn_p->ifn_name, ifn_index, 566 (void *)sctp_ifap); 567 if (new_ifn_af) { 568 /* Remove the created one that we don't want */ 569 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 570 } 571 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 572 /* easy to solve, just switch back to active */ 573 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 574 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 575 sctp_ifap->ifn_p = sctp_ifnp; 576 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 577 } 578 exit_stage_left: 579 SCTP_IPI_ADDR_WUNLOCK(); 580 return (sctp_ifap); 581 } else { 582 if (sctp_ifap->ifn_p) { 583 /* 584 * The last IFN gets the address, remove the 585 * old one 586 */ 587 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 588 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 589 sctp_ifap->ifn_p->ifn_index, if_name, 590 ifn_index); 591 /* remove the address from the old ifn */ 592 sctp_remove_ifa_from_ifn(sctp_ifap); 593 /* move the address over to the new ifn */ 594 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 595 goto exit_stage_left; 596 } else { 597 /* repair ifnp which was NULL ? */ 598 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 599 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 600 (void *)sctp_ifnp, (void *)sctp_ifap); 601 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 602 } 603 goto exit_stage_left; 604 } 605 } 606 SCTP_IPI_ADDR_WUNLOCK(); 607 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 608 if (sctp_ifap == NULL) { 609 #ifdef INVARIANTS 610 panic("No memory for IFA"); 611 #endif 612 return (NULL); 613 } 614 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 615 sctp_ifap->ifn_p = sctp_ifnp; 616 atomic_add_int(&sctp_ifnp->refcount, 1); 617 sctp_ifap->vrf_id = vrf_id; 618 sctp_ifap->ifa = ifa; 619 memcpy(&sctp_ifap->address, addr, addr->sa_len); 620 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 621 sctp_ifap->flags = ifa_flags; 622 /* Set scope */ 623 switch (sctp_ifap->address.sa.sa_family) { 624 #ifdef INET 625 case AF_INET: 626 { 627 struct sockaddr_in *sin; 628 629 sin = &sctp_ifap->address.sin; 630 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 631 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 632 sctp_ifap->src_is_loop = 1; 633 } 634 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 635 sctp_ifap->src_is_priv = 1; 636 } 637 sctp_ifnp->num_v4++; 638 if (new_ifn_af) 639 new_ifn_af = AF_INET; 640 break; 641 } 642 #endif 643 #ifdef INET6 644 case AF_INET6: 645 { 646 /* ok to use deprecated addresses? */ 647 struct sockaddr_in6 *sin6; 648 649 sin6 = &sctp_ifap->address.sin6; 650 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 651 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 652 sctp_ifap->src_is_loop = 1; 653 } 654 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 655 sctp_ifap->src_is_priv = 1; 656 } 657 sctp_ifnp->num_v6++; 658 if (new_ifn_af) 659 new_ifn_af = AF_INET6; 660 break; 661 } 662 #endif 663 default: 664 new_ifn_af = 0; 665 break; 666 } 667 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 668 669 if ((sctp_ifap->src_is_priv == 0) && 670 (sctp_ifap->src_is_loop == 0)) { 671 sctp_ifap->src_is_glob = 1; 672 } 673 SCTP_IPI_ADDR_WLOCK(); 674 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 675 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 676 sctp_ifap->refcount = 1; 677 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 678 sctp_ifnp->ifa_count++; 679 vrf->total_ifa_count++; 680 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 681 if (new_ifn_af) { 682 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 683 sctp_ifnp->registered_af = new_ifn_af; 684 } 685 SCTP_IPI_ADDR_WUNLOCK(); 686 if (dynamic_add) { 687 /* 688 * Bump up the refcount so that when the timer completes it 689 * will drop back down. 690 */ 691 struct sctp_laddr *wi; 692 693 atomic_add_int(&sctp_ifap->refcount, 1); 694 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 695 if (wi == NULL) { 696 /* 697 * Gak, what can we do? We have lost an address 698 * change can you say HOSED? 699 */ 700 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 701 /* Opps, must decrement the count */ 702 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 703 if_name); 704 return (NULL); 705 } 706 SCTP_INCR_LADDR_COUNT(); 707 memset(wi, 0, sizeof(*wi)); 708 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 709 wi->ifa = sctp_ifap; 710 wi->action = SCTP_ADD_IP_ADDRESS; 711 712 SCTP_WQ_ADDR_LOCK(); 713 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 714 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 715 (struct sctp_inpcb *)NULL, 716 (struct sctp_tcb *)NULL, 717 (struct sctp_nets *)NULL); 718 SCTP_WQ_ADDR_UNLOCK(); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724 } 725 726 void 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729 { 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739 #ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742 #endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. We do this especially for 752 * panda who might recycle indexes fast. 753 */ 754 if (if_name) { 755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 756 /* They match its a correct delete */ 757 valid = 1; 758 } 759 } 760 if (!valid) { 761 /* last ditch check ifn_index */ 762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 763 valid = 1; 764 } 765 } 766 if (!valid) { 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 768 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 771 SCTP_IPI_ADDR_WUNLOCK(); 772 return; 773 } 774 } 775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 777 /* 778 * We don't set the flag. This means that the structure will 779 * hang around in EP's that have bound specific to it until 780 * they close. This gives us TCP like behavior if someone 781 * removes an address (or for that matter adds it right 782 * back). 783 */ 784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 785 vrf->total_ifa_count--; 786 LIST_REMOVE(sctp_ifap, next_bucket); 787 sctp_remove_ifa_from_ifn(sctp_ifap); 788 } 789 #ifdef SCTP_DEBUG 790 else { 791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 792 ifn_index); 793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 794 } 795 #endif 796 797 out_now: 798 SCTP_IPI_ADDR_WUNLOCK(); 799 if (sctp_ifap) { 800 struct sctp_laddr *wi; 801 802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 803 if (wi == NULL) { 804 /* 805 * Gak, what can we do? We have lost an address 806 * change can you say HOSED? 807 */ 808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 809 810 /* Oops, must decrement the count */ 811 sctp_free_ifa(sctp_ifap); 812 return; 813 } 814 SCTP_INCR_LADDR_COUNT(); 815 memset(wi, 0, sizeof(*wi)); 816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 817 wi->ifa = sctp_ifap; 818 wi->action = SCTP_DEL_IP_ADDRESS; 819 SCTP_WQ_ADDR_LOCK(); 820 /* 821 * Should this really be a tailq? As it is we will process 822 * the newest first :-0 823 */ 824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 825 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 826 (struct sctp_inpcb *)NULL, 827 (struct sctp_tcb *)NULL, 828 (struct sctp_nets *)NULL); 829 SCTP_WQ_ADDR_UNLOCK(); 830 } 831 return; 832 } 833 834 835 static int 836 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 837 { 838 int loopback_scope; 839 #if defined(INET) 840 int ipv4_local_scope, ipv4_addr_legal; 841 #endif 842 #if defined(INET6) 843 int local_scope, site_scope, ipv6_addr_legal; 844 #endif 845 struct sctp_vrf *vrf; 846 struct sctp_ifn *sctp_ifn; 847 struct sctp_ifa *sctp_ifa; 848 849 loopback_scope = stcb->asoc.scope.loopback_scope; 850 #if defined(INET) 851 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 852 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 853 #endif 854 #if defined(INET6) 855 local_scope = stcb->asoc.scope.local_scope; 856 site_scope = stcb->asoc.scope.site_scope; 857 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 858 #endif 859 860 SCTP_IPI_ADDR_RLOCK(); 861 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 862 if (vrf == NULL) { 863 /* no vrf, no addresses */ 864 SCTP_IPI_ADDR_RUNLOCK(); 865 return (0); 866 } 867 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 868 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 869 if ((loopback_scope == 0) && 870 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 871 continue; 872 } 873 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 874 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 875 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 876 /* 877 * We allow pending addresses, where 878 * we have sent an asconf-add to be 879 * considered valid. 880 */ 881 continue; 882 } 883 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 884 continue; 885 } 886 switch (sctp_ifa->address.sa.sa_family) { 887 #ifdef INET 888 case AF_INET: 889 if (ipv4_addr_legal) { 890 struct sockaddr_in *sin, 891 *rsin; 892 893 sin = &sctp_ifa->address.sin; 894 rsin = (struct sockaddr_in *)to; 895 if ((ipv4_local_scope == 0) && 896 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 897 continue; 898 } 899 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 900 &sin->sin_addr) != 0) { 901 continue; 902 } 903 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 904 SCTP_IPI_ADDR_RUNLOCK(); 905 return (1); 906 } 907 } 908 break; 909 #endif 910 #ifdef INET6 911 case AF_INET6: 912 if (ipv6_addr_legal) { 913 struct sockaddr_in6 *sin6, 914 *rsin6; 915 916 sin6 = &sctp_ifa->address.sin6; 917 rsin6 = (struct sockaddr_in6 *)to; 918 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 919 &sin6->sin6_addr) != 0) { 920 continue; 921 } 922 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 923 if (local_scope == 0) 924 continue; 925 if (sin6->sin6_scope_id == 0) { 926 if (sa6_recoverscope(sin6) != 0) 927 continue; 928 } 929 } 930 if ((site_scope == 0) && 931 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 932 continue; 933 } 934 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 935 SCTP_IPI_ADDR_RUNLOCK(); 936 return (1); 937 } 938 } 939 break; 940 #endif 941 default: 942 /* TSNH */ 943 break; 944 } 945 } 946 } 947 } else { 948 struct sctp_laddr *laddr; 949 950 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 951 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 952 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 953 continue; 954 } 955 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 956 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 957 /* 958 * We allow pending addresses, where we have 959 * sent an asconf-add to be considered 960 * valid. 961 */ 962 continue; 963 } 964 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 965 continue; 966 } 967 switch (to->sa_family) { 968 #ifdef INET 969 case AF_INET: 970 { 971 struct sockaddr_in *sin, *rsin; 972 973 sin = &laddr->ifa->address.sin; 974 rsin = (struct sockaddr_in *)to; 975 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 976 SCTP_IPI_ADDR_RUNLOCK(); 977 return (1); 978 } 979 break; 980 } 981 #endif 982 #ifdef INET6 983 case AF_INET6: 984 { 985 struct sockaddr_in6 *sin6, *rsin6; 986 987 sin6 = &laddr->ifa->address.sin6; 988 rsin6 = (struct sockaddr_in6 *)to; 989 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 990 SCTP_IPI_ADDR_RUNLOCK(); 991 return (1); 992 } 993 break; 994 } 995 996 #endif 997 default: 998 /* TSNH */ 999 break; 1000 } 1001 1002 } 1003 } 1004 SCTP_IPI_ADDR_RUNLOCK(); 1005 return (0); 1006 } 1007 1008 1009 static struct sctp_tcb * 1010 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1011 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1012 { 1013 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1014 /* 1015 * If we support the TCP model, then we must now dig through to see 1016 * if we can find our endpoint in the list of tcp ep's. 1017 */ 1018 uint16_t lport, rport; 1019 struct sctppcbhead *ephead; 1020 struct sctp_inpcb *inp; 1021 struct sctp_laddr *laddr; 1022 struct sctp_tcb *stcb; 1023 struct sctp_nets *net; 1024 1025 if ((to == NULL) || (from == NULL)) { 1026 return (NULL); 1027 } 1028 switch (to->sa_family) { 1029 #ifdef INET 1030 case AF_INET: 1031 if (from->sa_family == AF_INET) { 1032 lport = ((struct sockaddr_in *)to)->sin_port; 1033 rport = ((struct sockaddr_in *)from)->sin_port; 1034 } else { 1035 return (NULL); 1036 } 1037 break; 1038 #endif 1039 #ifdef INET6 1040 case AF_INET6: 1041 if (from->sa_family == AF_INET6) { 1042 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1043 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1044 } else { 1045 return (NULL); 1046 } 1047 break; 1048 #endif 1049 default: 1050 return (NULL); 1051 } 1052 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1053 /* 1054 * Ok now for each of the guys in this bucket we must look and see: 1055 * - Does the remote port match. - Does there single association's 1056 * addresses match this address (to). If so we update p_ep to point 1057 * to this ep and return the tcb from it. 1058 */ 1059 LIST_FOREACH(inp, ephead, sctp_hash) { 1060 SCTP_INP_RLOCK(inp); 1061 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1062 SCTP_INP_RUNLOCK(inp); 1063 continue; 1064 } 1065 if (lport != inp->sctp_lport) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 switch (to->sa_family) { 1070 #ifdef INET 1071 case AF_INET: 1072 { 1073 struct sockaddr_in *sin; 1074 1075 sin = (struct sockaddr_in *)to; 1076 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1077 &sin->sin_addr) != 0) { 1078 SCTP_INP_RUNLOCK(inp); 1079 continue; 1080 } 1081 break; 1082 } 1083 #endif 1084 #ifdef INET6 1085 case AF_INET6: 1086 { 1087 struct sockaddr_in6 *sin6; 1088 1089 sin6 = (struct sockaddr_in6 *)to; 1090 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1091 &sin6->sin6_addr) != 0) { 1092 SCTP_INP_RUNLOCK(inp); 1093 continue; 1094 } 1095 break; 1096 } 1097 #endif 1098 default: 1099 SCTP_INP_RUNLOCK(inp); 1100 continue; 1101 } 1102 if (inp->def_vrf_id != vrf_id) { 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 /* check to see if the ep has one of the addresses */ 1107 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1108 /* We are NOT bound all, so look further */ 1109 int match = 0; 1110 1111 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1112 1113 if (laddr->ifa == NULL) { 1114 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1115 continue; 1116 } 1117 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1119 continue; 1120 } 1121 if (laddr->ifa->address.sa.sa_family == 1122 to->sa_family) { 1123 /* see if it matches */ 1124 #ifdef INET 1125 if (from->sa_family == AF_INET) { 1126 struct sockaddr_in *intf_addr, 1127 *sin; 1128 1129 intf_addr = &laddr->ifa->address.sin; 1130 sin = (struct sockaddr_in *)to; 1131 if (sin->sin_addr.s_addr == 1132 intf_addr->sin_addr.s_addr) { 1133 match = 1; 1134 break; 1135 } 1136 } 1137 #endif 1138 #ifdef INET6 1139 if (from->sa_family == AF_INET6) { 1140 struct sockaddr_in6 *intf_addr6; 1141 struct sockaddr_in6 *sin6; 1142 1143 sin6 = (struct sockaddr_in6 *) 1144 to; 1145 intf_addr6 = &laddr->ifa->address.sin6; 1146 1147 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1148 intf_addr6)) { 1149 match = 1; 1150 break; 1151 } 1152 } 1153 #endif 1154 } 1155 } 1156 if (match == 0) { 1157 /* This endpoint does not have this address */ 1158 SCTP_INP_RUNLOCK(inp); 1159 continue; 1160 } 1161 } 1162 /* 1163 * Ok if we hit here the ep has the address, does it hold 1164 * the tcb? 1165 */ 1166 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1167 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1168 if (stcb == NULL) { 1169 SCTP_INP_RUNLOCK(inp); 1170 continue; 1171 } 1172 SCTP_TCB_LOCK(stcb); 1173 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1174 SCTP_TCB_UNLOCK(stcb); 1175 SCTP_INP_RUNLOCK(inp); 1176 continue; 1177 } 1178 if (stcb->rport != rport) { 1179 /* remote port does not match. */ 1180 SCTP_TCB_UNLOCK(stcb); 1181 SCTP_INP_RUNLOCK(inp); 1182 continue; 1183 } 1184 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1185 SCTP_TCB_UNLOCK(stcb); 1186 SCTP_INP_RUNLOCK(inp); 1187 continue; 1188 } 1189 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1190 SCTP_TCB_UNLOCK(stcb); 1191 SCTP_INP_RUNLOCK(inp); 1192 continue; 1193 } 1194 /* Does this TCB have a matching address? */ 1195 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1196 1197 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1198 /* not the same family, can't be a match */ 1199 continue; 1200 } 1201 switch (from->sa_family) { 1202 #ifdef INET 1203 case AF_INET: 1204 { 1205 struct sockaddr_in *sin, *rsin; 1206 1207 sin = (struct sockaddr_in *)&net->ro._l_addr; 1208 rsin = (struct sockaddr_in *)from; 1209 if (sin->sin_addr.s_addr == 1210 rsin->sin_addr.s_addr) { 1211 /* found it */ 1212 if (netp != NULL) { 1213 *netp = net; 1214 } 1215 /* 1216 * Update the endpoint 1217 * pointer 1218 */ 1219 *inp_p = inp; 1220 SCTP_INP_RUNLOCK(inp); 1221 return (stcb); 1222 } 1223 break; 1224 } 1225 #endif 1226 #ifdef INET6 1227 case AF_INET6: 1228 { 1229 struct sockaddr_in6 *sin6, *rsin6; 1230 1231 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1232 rsin6 = (struct sockaddr_in6 *)from; 1233 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1234 rsin6)) { 1235 /* found it */ 1236 if (netp != NULL) { 1237 *netp = net; 1238 } 1239 /* 1240 * Update the endpoint 1241 * pointer 1242 */ 1243 *inp_p = inp; 1244 SCTP_INP_RUNLOCK(inp); 1245 return (stcb); 1246 } 1247 break; 1248 } 1249 #endif 1250 default: 1251 /* TSNH */ 1252 break; 1253 } 1254 } 1255 SCTP_TCB_UNLOCK(stcb); 1256 SCTP_INP_RUNLOCK(inp); 1257 } 1258 return (NULL); 1259 } 1260 1261 1262 /* 1263 * rules for use 1264 * 1265 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1266 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1267 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1268 * NULL. 1269 */ 1270 1271 struct sctp_tcb * 1272 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1273 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1274 { 1275 struct sctpasochead *head; 1276 struct sctp_inpcb *inp; 1277 struct sctp_tcb *stcb = NULL; 1278 struct sctp_nets *net; 1279 uint16_t rport; 1280 1281 inp = *inp_p; 1282 switch (remote->sa_family) { 1283 #ifdef INET 1284 case AF_INET: 1285 rport = (((struct sockaddr_in *)remote)->sin_port); 1286 break; 1287 #endif 1288 #ifdef INET6 1289 case AF_INET6: 1290 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1291 break; 1292 #endif 1293 default: 1294 return (NULL); 1295 } 1296 if (locked_tcb) { 1297 /* 1298 * UN-lock so we can do proper locking here this occurs when 1299 * called from load_addresses_from_init. 1300 */ 1301 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1302 SCTP_TCB_UNLOCK(locked_tcb); 1303 } 1304 SCTP_INP_INFO_RLOCK(); 1305 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1306 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1307 /*- 1308 * Now either this guy is our listener or it's the 1309 * connector. If it is the one that issued the connect, then 1310 * it's only chance is to be the first TCB in the list. If 1311 * it is the acceptor, then do the special_lookup to hash 1312 * and find the real inp. 1313 */ 1314 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1315 /* to is peer addr, from is my addr */ 1316 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1317 netp, inp->def_vrf_id); 1318 if ((stcb != NULL) && (locked_tcb == NULL)) { 1319 /* we have a locked tcb, lower refcount */ 1320 SCTP_INP_DECR_REF(inp); 1321 } 1322 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1323 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1324 SCTP_TCB_LOCK(locked_tcb); 1325 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1326 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1327 } 1328 SCTP_INP_INFO_RUNLOCK(); 1329 return (stcb); 1330 } else { 1331 SCTP_INP_WLOCK(inp); 1332 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1333 goto null_return; 1334 } 1335 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1336 if (stcb == NULL) { 1337 goto null_return; 1338 } 1339 SCTP_TCB_LOCK(stcb); 1340 1341 if (stcb->rport != rport) { 1342 /* remote port does not match. */ 1343 SCTP_TCB_UNLOCK(stcb); 1344 goto null_return; 1345 } 1346 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 /* now look at the list of remote addresses */ 1355 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1356 #ifdef INVARIANTS 1357 if (net == (TAILQ_NEXT(net, sctp_next))) { 1358 panic("Corrupt net list"); 1359 } 1360 #endif 1361 if (net->ro._l_addr.sa.sa_family != 1362 remote->sa_family) { 1363 /* not the same family */ 1364 continue; 1365 } 1366 switch (remote->sa_family) { 1367 #ifdef INET 1368 case AF_INET: 1369 { 1370 struct sockaddr_in *sin, 1371 *rsin; 1372 1373 sin = (struct sockaddr_in *) 1374 &net->ro._l_addr; 1375 rsin = (struct sockaddr_in *)remote; 1376 if (sin->sin_addr.s_addr == 1377 rsin->sin_addr.s_addr) { 1378 /* found it */ 1379 if (netp != NULL) { 1380 *netp = net; 1381 } 1382 if (locked_tcb == NULL) { 1383 SCTP_INP_DECR_REF(inp); 1384 } else if (locked_tcb != stcb) { 1385 SCTP_TCB_LOCK(locked_tcb); 1386 } 1387 if (locked_tcb) { 1388 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1389 } 1390 SCTP_INP_WUNLOCK(inp); 1391 SCTP_INP_INFO_RUNLOCK(); 1392 return (stcb); 1393 } 1394 break; 1395 } 1396 #endif 1397 #ifdef INET6 1398 case AF_INET6: 1399 { 1400 struct sockaddr_in6 *sin6, 1401 *rsin6; 1402 1403 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1404 rsin6 = (struct sockaddr_in6 *)remote; 1405 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1406 rsin6)) { 1407 /* found it */ 1408 if (netp != NULL) { 1409 *netp = net; 1410 } 1411 if (locked_tcb == NULL) { 1412 SCTP_INP_DECR_REF(inp); 1413 } else if (locked_tcb != stcb) { 1414 SCTP_TCB_LOCK(locked_tcb); 1415 } 1416 if (locked_tcb) { 1417 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1418 } 1419 SCTP_INP_WUNLOCK(inp); 1420 SCTP_INP_INFO_RUNLOCK(); 1421 return (stcb); 1422 } 1423 break; 1424 } 1425 #endif 1426 default: 1427 /* TSNH */ 1428 break; 1429 } 1430 } 1431 SCTP_TCB_UNLOCK(stcb); 1432 } 1433 } else { 1434 SCTP_INP_WLOCK(inp); 1435 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1436 goto null_return; 1437 } 1438 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1439 inp->sctp_hashmark)]; 1440 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1441 if (stcb->rport != rport) { 1442 /* remote port does not match */ 1443 continue; 1444 } 1445 SCTP_TCB_LOCK(stcb); 1446 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1447 SCTP_TCB_UNLOCK(stcb); 1448 continue; 1449 } 1450 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 /* now look at the list of remote addresses */ 1455 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1456 #ifdef INVARIANTS 1457 if (net == (TAILQ_NEXT(net, sctp_next))) { 1458 panic("Corrupt net list"); 1459 } 1460 #endif 1461 if (net->ro._l_addr.sa.sa_family != 1462 remote->sa_family) { 1463 /* not the same family */ 1464 continue; 1465 } 1466 switch (remote->sa_family) { 1467 #ifdef INET 1468 case AF_INET: 1469 { 1470 struct sockaddr_in *sin, 1471 *rsin; 1472 1473 sin = (struct sockaddr_in *) 1474 &net->ro._l_addr; 1475 rsin = (struct sockaddr_in *)remote; 1476 if (sin->sin_addr.s_addr == 1477 rsin->sin_addr.s_addr) { 1478 /* found it */ 1479 if (netp != NULL) { 1480 *netp = net; 1481 } 1482 if (locked_tcb == NULL) { 1483 SCTP_INP_DECR_REF(inp); 1484 } else if (locked_tcb != stcb) { 1485 SCTP_TCB_LOCK(locked_tcb); 1486 } 1487 if (locked_tcb) { 1488 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1489 } 1490 SCTP_INP_WUNLOCK(inp); 1491 SCTP_INP_INFO_RUNLOCK(); 1492 return (stcb); 1493 } 1494 break; 1495 } 1496 #endif 1497 #ifdef INET6 1498 case AF_INET6: 1499 { 1500 struct sockaddr_in6 *sin6, 1501 *rsin6; 1502 1503 sin6 = (struct sockaddr_in6 *) 1504 &net->ro._l_addr; 1505 rsin6 = (struct sockaddr_in6 *)remote; 1506 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1507 rsin6)) { 1508 /* found it */ 1509 if (netp != NULL) { 1510 *netp = net; 1511 } 1512 if (locked_tcb == NULL) { 1513 SCTP_INP_DECR_REF(inp); 1514 } else if (locked_tcb != stcb) { 1515 SCTP_TCB_LOCK(locked_tcb); 1516 } 1517 if (locked_tcb) { 1518 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1519 } 1520 SCTP_INP_WUNLOCK(inp); 1521 SCTP_INP_INFO_RUNLOCK(); 1522 return (stcb); 1523 } 1524 break; 1525 } 1526 #endif 1527 default: 1528 /* TSNH */ 1529 break; 1530 } 1531 } 1532 SCTP_TCB_UNLOCK(stcb); 1533 } 1534 } 1535 null_return: 1536 /* clean up for returning null */ 1537 if (locked_tcb) { 1538 SCTP_TCB_LOCK(locked_tcb); 1539 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1540 } 1541 SCTP_INP_WUNLOCK(inp); 1542 SCTP_INP_INFO_RUNLOCK(); 1543 /* not found */ 1544 return (NULL); 1545 } 1546 1547 1548 /* 1549 * Find an association for a specific endpoint using the association id given 1550 * out in the COMM_UP notification 1551 */ 1552 struct sctp_tcb * 1553 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1554 { 1555 /* 1556 * Use my the assoc_id to find a endpoint 1557 */ 1558 struct sctpasochead *head; 1559 struct sctp_tcb *stcb; 1560 uint32_t id; 1561 1562 if (inp == NULL) { 1563 SCTP_PRINTF("TSNH ep_associd\n"); 1564 return (NULL); 1565 } 1566 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1567 SCTP_PRINTF("TSNH ep_associd0\n"); 1568 return (NULL); 1569 } 1570 id = (uint32_t)asoc_id; 1571 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1572 if (head == NULL) { 1573 /* invalid id TSNH */ 1574 SCTP_PRINTF("TSNH ep_associd1\n"); 1575 return (NULL); 1576 } 1577 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1578 if (stcb->asoc.assoc_id == id) { 1579 if (inp != stcb->sctp_ep) { 1580 /* 1581 * some other guy has the same id active (id 1582 * collision ??). 1583 */ 1584 SCTP_PRINTF("TSNH ep_associd2\n"); 1585 continue; 1586 } 1587 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1588 continue; 1589 } 1590 if (want_lock) { 1591 SCTP_TCB_LOCK(stcb); 1592 } 1593 return (stcb); 1594 } 1595 } 1596 return (NULL); 1597 } 1598 1599 1600 struct sctp_tcb * 1601 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1602 { 1603 struct sctp_tcb *stcb; 1604 1605 SCTP_INP_RLOCK(inp); 1606 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1607 SCTP_INP_RUNLOCK(inp); 1608 return (stcb); 1609 } 1610 1611 1612 /* 1613 * Endpoint probe expects that the INP_INFO is locked. 1614 */ 1615 static struct sctp_inpcb * 1616 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1617 uint16_t lport, uint32_t vrf_id) 1618 { 1619 struct sctp_inpcb *inp; 1620 struct sctp_laddr *laddr; 1621 #ifdef INET 1622 struct sockaddr_in *sin; 1623 #endif 1624 #ifdef INET6 1625 struct sockaddr_in6 *sin6; 1626 struct sockaddr_in6 *intf_addr6; 1627 #endif 1628 int fnd; 1629 1630 #ifdef INET 1631 sin = NULL; 1632 #endif 1633 #ifdef INET6 1634 sin6 = NULL; 1635 #endif 1636 switch (nam->sa_family) { 1637 #ifdef INET 1638 case AF_INET: 1639 sin = (struct sockaddr_in *)nam; 1640 break; 1641 #endif 1642 #ifdef INET6 1643 case AF_INET6: 1644 sin6 = (struct sockaddr_in6 *)nam; 1645 break; 1646 #endif 1647 default: 1648 /* unsupported family */ 1649 return (NULL); 1650 } 1651 1652 if (head == NULL) 1653 return (NULL); 1654 1655 LIST_FOREACH(inp, head, sctp_hash) { 1656 SCTP_INP_RLOCK(inp); 1657 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1658 SCTP_INP_RUNLOCK(inp); 1659 continue; 1660 } 1661 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1662 (inp->sctp_lport == lport)) { 1663 /* got it */ 1664 switch (nam->sa_family) { 1665 #ifdef INET 1666 case AF_INET: 1667 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1668 SCTP_IPV6_V6ONLY(inp)) { 1669 /* 1670 * IPv4 on a IPv6 socket with ONLY 1671 * IPv6 set 1672 */ 1673 SCTP_INP_RUNLOCK(inp); 1674 continue; 1675 } 1676 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1677 &sin->sin_addr) != 0) { 1678 SCTP_INP_RUNLOCK(inp); 1679 continue; 1680 } 1681 break; 1682 #endif 1683 #ifdef INET6 1684 case AF_INET6: 1685 /* 1686 * A V6 address and the endpoint is NOT 1687 * bound V6 1688 */ 1689 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1690 SCTP_INP_RUNLOCK(inp); 1691 continue; 1692 } 1693 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1694 &sin6->sin6_addr) != 0) { 1695 SCTP_INP_RUNLOCK(inp); 1696 continue; 1697 } 1698 break; 1699 #endif 1700 default: 1701 break; 1702 } 1703 /* does a VRF id match? */ 1704 fnd = 0; 1705 if (inp->def_vrf_id == vrf_id) 1706 fnd = 1; 1707 1708 SCTP_INP_RUNLOCK(inp); 1709 if (!fnd) 1710 continue; 1711 return (inp); 1712 } 1713 SCTP_INP_RUNLOCK(inp); 1714 } 1715 switch (nam->sa_family) { 1716 #ifdef INET 1717 case AF_INET: 1718 if (sin->sin_addr.s_addr == INADDR_ANY) { 1719 /* Can't hunt for one that has no address specified */ 1720 return (NULL); 1721 } 1722 break; 1723 #endif 1724 #ifdef INET6 1725 case AF_INET6: 1726 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1727 /* Can't hunt for one that has no address specified */ 1728 return (NULL); 1729 } 1730 break; 1731 #endif 1732 default: 1733 break; 1734 } 1735 /* 1736 * ok, not bound to all so see if we can find a EP bound to this 1737 * address. 1738 */ 1739 LIST_FOREACH(inp, head, sctp_hash) { 1740 SCTP_INP_RLOCK(inp); 1741 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1742 SCTP_INP_RUNLOCK(inp); 1743 continue; 1744 } 1745 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1746 SCTP_INP_RUNLOCK(inp); 1747 continue; 1748 } 1749 /* 1750 * Ok this could be a likely candidate, look at all of its 1751 * addresses 1752 */ 1753 if (inp->sctp_lport != lport) { 1754 SCTP_INP_RUNLOCK(inp); 1755 continue; 1756 } 1757 /* does a VRF id match? */ 1758 fnd = 0; 1759 if (inp->def_vrf_id == vrf_id) 1760 fnd = 1; 1761 1762 if (!fnd) { 1763 SCTP_INP_RUNLOCK(inp); 1764 continue; 1765 } 1766 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1767 if (laddr->ifa == NULL) { 1768 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1769 __func__); 1770 continue; 1771 } 1772 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1773 (void *)laddr->ifa); 1774 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1775 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1776 continue; 1777 } 1778 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1779 /* possible, see if it matches */ 1780 switch (nam->sa_family) { 1781 #ifdef INET 1782 case AF_INET: 1783 if (sin->sin_addr.s_addr == 1784 laddr->ifa->address.sin.sin_addr.s_addr) { 1785 SCTP_INP_RUNLOCK(inp); 1786 return (inp); 1787 } 1788 break; 1789 #endif 1790 #ifdef INET6 1791 case AF_INET6: 1792 intf_addr6 = &laddr->ifa->address.sin6; 1793 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1794 intf_addr6)) { 1795 SCTP_INP_RUNLOCK(inp); 1796 return (inp); 1797 } 1798 break; 1799 #endif 1800 } 1801 } 1802 } 1803 SCTP_INP_RUNLOCK(inp); 1804 } 1805 return (NULL); 1806 } 1807 1808 1809 static struct sctp_inpcb * 1810 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1811 { 1812 struct sctppcbhead *head; 1813 struct sctp_inpcb *t_inp; 1814 int fnd; 1815 1816 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1817 SCTP_BASE_INFO(hashmark))]; 1818 LIST_FOREACH(t_inp, head, sctp_hash) { 1819 if (t_inp->sctp_lport != lport) { 1820 continue; 1821 } 1822 /* is it in the VRF in question */ 1823 fnd = 0; 1824 if (t_inp->def_vrf_id == vrf_id) 1825 fnd = 1; 1826 if (!fnd) 1827 continue; 1828 1829 /* This one is in use. */ 1830 /* check the v6/v4 binding issue */ 1831 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1832 SCTP_IPV6_V6ONLY(t_inp)) { 1833 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1834 /* collision in V6 space */ 1835 return (t_inp); 1836 } else { 1837 /* inp is BOUND_V4 no conflict */ 1838 continue; 1839 } 1840 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1841 /* t_inp is bound v4 and v6, conflict always */ 1842 return (t_inp); 1843 } else { 1844 /* t_inp is bound only V4 */ 1845 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1846 SCTP_IPV6_V6ONLY(inp)) { 1847 /* no conflict */ 1848 continue; 1849 } 1850 /* else fall through to conflict */ 1851 } 1852 return (t_inp); 1853 } 1854 return (NULL); 1855 } 1856 1857 1858 int 1859 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1860 { 1861 /* For 1-2-1 with port reuse */ 1862 struct sctppcbhead *head; 1863 struct sctp_inpcb *tinp, *ninp; 1864 1865 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1866 /* only works with port reuse on */ 1867 return (-1); 1868 } 1869 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1870 return (0); 1871 } 1872 SCTP_INP_RUNLOCK(inp); 1873 SCTP_INP_INFO_WLOCK(); 1874 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1875 SCTP_BASE_INFO(hashmark))]; 1876 /* Kick out all non-listeners to the TCP hash */ 1877 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1878 if (tinp->sctp_lport != inp->sctp_lport) { 1879 continue; 1880 } 1881 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1882 continue; 1883 } 1884 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1885 continue; 1886 } 1887 if (SCTP_IS_LISTENING(tinp)) { 1888 continue; 1889 } 1890 SCTP_INP_WLOCK(tinp); 1891 LIST_REMOVE(tinp, sctp_hash); 1892 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1893 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1894 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1895 SCTP_INP_WUNLOCK(tinp); 1896 } 1897 SCTP_INP_WLOCK(inp); 1898 /* Pull from where he was */ 1899 LIST_REMOVE(inp, sctp_hash); 1900 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1901 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1902 LIST_INSERT_HEAD(head, inp, sctp_hash); 1903 SCTP_INP_WUNLOCK(inp); 1904 SCTP_INP_RLOCK(inp); 1905 SCTP_INP_INFO_WUNLOCK(); 1906 return (0); 1907 } 1908 1909 1910 struct sctp_inpcb * 1911 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1912 uint32_t vrf_id) 1913 { 1914 /* 1915 * First we check the hash table to see if someone has this port 1916 * bound with just the port. 1917 */ 1918 struct sctp_inpcb *inp; 1919 struct sctppcbhead *head; 1920 int lport; 1921 unsigned int i; 1922 #ifdef INET 1923 struct sockaddr_in *sin; 1924 #endif 1925 #ifdef INET6 1926 struct sockaddr_in6 *sin6; 1927 #endif 1928 1929 switch (nam->sa_family) { 1930 #ifdef INET 1931 case AF_INET: 1932 sin = (struct sockaddr_in *)nam; 1933 lport = sin->sin_port; 1934 break; 1935 #endif 1936 #ifdef INET6 1937 case AF_INET6: 1938 sin6 = (struct sockaddr_in6 *)nam; 1939 lport = sin6->sin6_port; 1940 break; 1941 #endif 1942 default: 1943 return (NULL); 1944 } 1945 /* 1946 * I could cheat here and just cast to one of the types but we will 1947 * do it right. It also provides the check against an Unsupported 1948 * type too. 1949 */ 1950 /* Find the head of the ALLADDR chain */ 1951 if (have_lock == 0) { 1952 SCTP_INP_INFO_RLOCK(); 1953 } 1954 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1955 SCTP_BASE_INFO(hashmark))]; 1956 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1957 1958 /* 1959 * If the TCP model exists it could be that the main listening 1960 * endpoint is gone but there still exists a connected socket for 1961 * this guy. If so we can return the first one that we find. This 1962 * may NOT be the correct one so the caller should be wary on the 1963 * returned INP. Currently the only caller that sets find_tcp_pool 1964 * is in bindx where we are verifying that a user CAN bind the 1965 * address. He either has bound it already, or someone else has, or 1966 * its open to bind, so this is good enough. 1967 */ 1968 if (inp == NULL && find_tcp_pool) { 1969 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1970 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1971 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1972 if (inp) { 1973 break; 1974 } 1975 } 1976 } 1977 if (inp) { 1978 SCTP_INP_INCR_REF(inp); 1979 } 1980 if (have_lock == 0) { 1981 SCTP_INP_INFO_RUNLOCK(); 1982 } 1983 return (inp); 1984 } 1985 1986 1987 /* 1988 * Find an association for an endpoint with the pointer to whom you want to 1989 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1990 * need to change the *to to some other struct like a mbuf... 1991 */ 1992 struct sctp_tcb * 1993 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1994 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1995 uint32_t vrf_id) 1996 { 1997 struct sctp_inpcb *inp = NULL; 1998 struct sctp_tcb *stcb; 1999 2000 SCTP_INP_INFO_RLOCK(); 2001 if (find_tcp_pool) { 2002 if (inp_p != NULL) { 2003 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2004 vrf_id); 2005 } else { 2006 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2007 vrf_id); 2008 } 2009 if (stcb != NULL) { 2010 SCTP_INP_INFO_RUNLOCK(); 2011 return (stcb); 2012 } 2013 } 2014 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2015 if (inp_p != NULL) { 2016 *inp_p = inp; 2017 } 2018 SCTP_INP_INFO_RUNLOCK(); 2019 if (inp == NULL) { 2020 return (NULL); 2021 } 2022 /* 2023 * ok, we have an endpoint, now lets find the assoc for it (if any) 2024 * we now place the source address or from in the to of the find 2025 * endpoint call. Since in reality this chain is used from the 2026 * inbound packet side. 2027 */ 2028 if (inp_p != NULL) { 2029 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2030 NULL); 2031 } else { 2032 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2033 NULL); 2034 } 2035 return (stcb); 2036 } 2037 2038 2039 /* 2040 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2041 * find all addresses that the sender has specified in any address list. Each 2042 * address will be used to lookup the TCB and see if one exits. 2043 */ 2044 static struct sctp_tcb * 2045 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2046 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2047 struct sockaddr *dst) 2048 { 2049 struct sctp_paramhdr *phdr, param_buf; 2050 #if defined(INET) || defined(INET6) 2051 struct sctp_tcb *stcb; 2052 uint16_t ptype; 2053 #endif 2054 uint16_t plen; 2055 #ifdef INET 2056 struct sockaddr_in sin4; 2057 #endif 2058 #ifdef INET6 2059 struct sockaddr_in6 sin6; 2060 #endif 2061 2062 #ifdef INET 2063 memset(&sin4, 0, sizeof(sin4)); 2064 sin4.sin_len = sizeof(sin4); 2065 sin4.sin_family = AF_INET; 2066 sin4.sin_port = sh->src_port; 2067 #endif 2068 #ifdef INET6 2069 memset(&sin6, 0, sizeof(sin6)); 2070 sin6.sin6_len = sizeof(sin6); 2071 sin6.sin6_family = AF_INET6; 2072 sin6.sin6_port = sh->src_port; 2073 #endif 2074 2075 offset += sizeof(struct sctp_init_chunk); 2076 2077 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2078 while (phdr != NULL) { 2079 /* now we must see if we want the parameter */ 2080 #if defined(INET) || defined(INET6) 2081 ptype = ntohs(phdr->param_type); 2082 #endif 2083 plen = ntohs(phdr->param_length); 2084 if (plen == 0) { 2085 break; 2086 } 2087 #ifdef INET 2088 if (ptype == SCTP_IPV4_ADDRESS && 2089 plen == sizeof(struct sctp_ipv4addr_param)) { 2090 /* Get the rest of the address */ 2091 struct sctp_ipv4addr_param ip4_param, *p4; 2092 2093 phdr = sctp_get_next_param(m, offset, 2094 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2095 if (phdr == NULL) { 2096 return (NULL); 2097 } 2098 p4 = (struct sctp_ipv4addr_param *)phdr; 2099 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2100 /* look it up */ 2101 stcb = sctp_findassociation_ep_addr(inp_p, 2102 (struct sockaddr *)&sin4, netp, dst, NULL); 2103 if (stcb != NULL) { 2104 return (stcb); 2105 } 2106 } 2107 #endif 2108 #ifdef INET6 2109 if (ptype == SCTP_IPV6_ADDRESS && 2110 plen == sizeof(struct sctp_ipv6addr_param)) { 2111 /* Get the rest of the address */ 2112 struct sctp_ipv6addr_param ip6_param, *p6; 2113 2114 phdr = sctp_get_next_param(m, offset, 2115 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2116 if (phdr == NULL) { 2117 return (NULL); 2118 } 2119 p6 = (struct sctp_ipv6addr_param *)phdr; 2120 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2121 /* look it up */ 2122 stcb = sctp_findassociation_ep_addr(inp_p, 2123 (struct sockaddr *)&sin6, netp, dst, NULL); 2124 if (stcb != NULL) { 2125 return (stcb); 2126 } 2127 } 2128 #endif 2129 offset += SCTP_SIZE32(plen); 2130 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2131 sizeof(param_buf)); 2132 } 2133 return (NULL); 2134 } 2135 2136 static struct sctp_tcb * 2137 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2138 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2139 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2140 { 2141 /* 2142 * Use my vtag to hash. If we find it we then verify the source addr 2143 * is in the assoc. If all goes well we save a bit on rec of a 2144 * packet. 2145 */ 2146 struct sctpasochead *head; 2147 struct sctp_nets *net; 2148 struct sctp_tcb *stcb; 2149 2150 SCTP_INP_INFO_RLOCK(); 2151 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2152 SCTP_BASE_INFO(hashasocmark))]; 2153 LIST_FOREACH(stcb, head, sctp_asocs) { 2154 SCTP_INP_RLOCK(stcb->sctp_ep); 2155 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2156 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2157 continue; 2158 } 2159 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2160 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2161 continue; 2162 } 2163 SCTP_TCB_LOCK(stcb); 2164 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2165 if (stcb->asoc.my_vtag == vtag) { 2166 /* candidate */ 2167 if (stcb->rport != rport) { 2168 SCTP_TCB_UNLOCK(stcb); 2169 continue; 2170 } 2171 if (stcb->sctp_ep->sctp_lport != lport) { 2172 SCTP_TCB_UNLOCK(stcb); 2173 continue; 2174 } 2175 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2176 SCTP_TCB_UNLOCK(stcb); 2177 continue; 2178 } 2179 /* RRS:Need toaddr check here */ 2180 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2181 /* Endpoint does not own this address */ 2182 SCTP_TCB_UNLOCK(stcb); 2183 continue; 2184 } 2185 if (remote_tag) { 2186 /* 2187 * If we have both vtags that's all we match 2188 * on 2189 */ 2190 if (stcb->asoc.peer_vtag == remote_tag) { 2191 /* 2192 * If both tags match we consider it 2193 * conclusive and check NO 2194 * source/destination addresses 2195 */ 2196 goto conclusive; 2197 } 2198 } 2199 if (skip_src_check) { 2200 conclusive: 2201 if (from) { 2202 *netp = sctp_findnet(stcb, from); 2203 } else { 2204 *netp = NULL; /* unknown */ 2205 } 2206 if (inp_p) 2207 *inp_p = stcb->sctp_ep; 2208 SCTP_INP_INFO_RUNLOCK(); 2209 return (stcb); 2210 } 2211 net = sctp_findnet(stcb, from); 2212 if (net) { 2213 /* yep its him. */ 2214 *netp = net; 2215 SCTP_STAT_INCR(sctps_vtagexpress); 2216 *inp_p = stcb->sctp_ep; 2217 SCTP_INP_INFO_RUNLOCK(); 2218 return (stcb); 2219 } else { 2220 /* 2221 * not him, this should only happen in rare 2222 * cases so I peg it. 2223 */ 2224 SCTP_STAT_INCR(sctps_vtagbogus); 2225 } 2226 } 2227 SCTP_TCB_UNLOCK(stcb); 2228 } 2229 SCTP_INP_INFO_RUNLOCK(); 2230 return (NULL); 2231 } 2232 2233 2234 /* 2235 * Find an association with the pointer to the inbound IP packet. This can be 2236 * a IPv4 or IPv6 packet. 2237 */ 2238 struct sctp_tcb * 2239 sctp_findassociation_addr(struct mbuf *m, int offset, 2240 struct sockaddr *src, struct sockaddr *dst, 2241 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2242 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2243 { 2244 struct sctp_tcb *stcb; 2245 struct sctp_inpcb *inp; 2246 2247 if (sh->v_tag) { 2248 /* we only go down this path if vtag is non-zero */ 2249 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2250 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2251 if (stcb) { 2252 return (stcb); 2253 } 2254 } 2255 if (inp_p) { 2256 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2257 1, vrf_id); 2258 inp = *inp_p; 2259 } else { 2260 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2261 1, vrf_id); 2262 } 2263 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2264 if (stcb == NULL && inp) { 2265 /* Found a EP but not this address */ 2266 if ((ch->chunk_type == SCTP_INITIATION) || 2267 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2268 /*- 2269 * special hook, we do NOT return linp or an 2270 * association that is linked to an existing 2271 * association that is under the TCP pool (i.e. no 2272 * listener exists). The endpoint finding routine 2273 * will always find a listener before examining the 2274 * TCP pool. 2275 */ 2276 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2277 if (inp_p) { 2278 *inp_p = NULL; 2279 } 2280 return (NULL); 2281 } 2282 stcb = sctp_findassociation_special_addr(m, 2283 offset, sh, &inp, netp, dst); 2284 if (inp_p != NULL) { 2285 *inp_p = inp; 2286 } 2287 } 2288 } 2289 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2290 return (stcb); 2291 } 2292 2293 /* 2294 * lookup an association by an ASCONF lookup address. 2295 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2296 */ 2297 struct sctp_tcb * 2298 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2299 struct sockaddr *dst, struct sctphdr *sh, 2300 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2301 { 2302 struct sctp_tcb *stcb; 2303 union sctp_sockstore remote_store; 2304 struct sctp_paramhdr param_buf, *phdr; 2305 int ptype; 2306 int zero_address = 0; 2307 #ifdef INET 2308 struct sockaddr_in *sin; 2309 #endif 2310 #ifdef INET6 2311 struct sockaddr_in6 *sin6; 2312 #endif 2313 2314 memset(&remote_store, 0, sizeof(remote_store)); 2315 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2316 ¶m_buf, sizeof(struct sctp_paramhdr)); 2317 if (phdr == NULL) { 2318 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2319 __func__); 2320 return NULL; 2321 } 2322 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2323 /* get the correlation address */ 2324 switch (ptype) { 2325 #ifdef INET6 2326 case SCTP_IPV6_ADDRESS: 2327 { 2328 /* ipv6 address param */ 2329 struct sctp_ipv6addr_param *p6, p6_buf; 2330 2331 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2332 return NULL; 2333 } 2334 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2335 offset + sizeof(struct sctp_asconf_chunk), 2336 &p6_buf.ph, sizeof(p6_buf)); 2337 if (p6 == NULL) { 2338 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2339 __func__); 2340 return (NULL); 2341 } 2342 sin6 = &remote_store.sin6; 2343 sin6->sin6_family = AF_INET6; 2344 sin6->sin6_len = sizeof(*sin6); 2345 sin6->sin6_port = sh->src_port; 2346 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2347 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2348 zero_address = 1; 2349 break; 2350 } 2351 #endif 2352 #ifdef INET 2353 case SCTP_IPV4_ADDRESS: 2354 { 2355 /* ipv4 address param */ 2356 struct sctp_ipv4addr_param *p4, p4_buf; 2357 2358 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2359 return NULL; 2360 } 2361 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2362 offset + sizeof(struct sctp_asconf_chunk), 2363 &p4_buf.ph, sizeof(p4_buf)); 2364 if (p4 == NULL) { 2365 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2366 __func__); 2367 return (NULL); 2368 } 2369 sin = &remote_store.sin; 2370 sin->sin_family = AF_INET; 2371 sin->sin_len = sizeof(*sin); 2372 sin->sin_port = sh->src_port; 2373 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2374 if (sin->sin_addr.s_addr == INADDR_ANY) 2375 zero_address = 1; 2376 break; 2377 } 2378 #endif 2379 default: 2380 /* invalid address param type */ 2381 return NULL; 2382 } 2383 2384 if (zero_address) { 2385 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2386 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2387 if (stcb != NULL) { 2388 SCTP_INP_DECR_REF(*inp_p); 2389 } 2390 } else { 2391 stcb = sctp_findassociation_ep_addr(inp_p, 2392 &remote_store.sa, netp, 2393 dst, NULL); 2394 } 2395 return (stcb); 2396 } 2397 2398 2399 /* 2400 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2401 * addresses. This way if we don't get a bind we by default pick a ephemeral 2402 * port with all addresses bound. 2403 */ 2404 int 2405 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2406 { 2407 /* 2408 * we get called when a new endpoint starts up. We need to allocate 2409 * the sctp_inpcb structure from the zone and init it. Mark it as 2410 * unbound and find a port that we can use as an ephemeral with 2411 * INADDR_ANY. If the user binds later no problem we can then add in 2412 * the specific addresses. And setup the default parameters for the 2413 * EP. 2414 */ 2415 int i, error; 2416 struct sctp_inpcb *inp; 2417 struct sctp_pcb *m; 2418 struct timeval time; 2419 sctp_sharedkey_t *null_key; 2420 2421 error = 0; 2422 2423 SCTP_INP_INFO_WLOCK(); 2424 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2425 if (inp == NULL) { 2426 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2427 SCTP_INP_INFO_WUNLOCK(); 2428 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2429 return (ENOBUFS); 2430 } 2431 /* zap it */ 2432 memset(inp, 0, sizeof(*inp)); 2433 2434 /* bump generations */ 2435 /* setup socket pointers */ 2436 inp->sctp_socket = so; 2437 inp->ip_inp.inp.inp_socket = so; 2438 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2439 #ifdef INET6 2440 if (INP_SOCKAF(so) == AF_INET6) { 2441 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2442 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2443 } 2444 if (MODULE_GLOBAL(ip6_v6only)) { 2445 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2446 } 2447 } 2448 #endif 2449 inp->sctp_associd_counter = 1; 2450 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2451 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2452 inp->max_cwnd = 0; 2453 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2454 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2455 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2456 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2457 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2458 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2459 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2460 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2461 inp->idata_supported = 0; 2462 2463 inp->fibnum = so->so_fibnum; 2464 /* init the small hash table we use to track asocid <-> tcb */ 2465 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2466 if (inp->sctp_asocidhash == NULL) { 2467 crfree(inp->ip_inp.inp.inp_cred); 2468 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2469 SCTP_INP_INFO_WUNLOCK(); 2470 return (ENOBUFS); 2471 } 2472 SCTP_INCR_EP_COUNT(); 2473 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2474 SCTP_INP_INFO_WUNLOCK(); 2475 2476 so->so_pcb = (caddr_t)inp; 2477 2478 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2479 /* UDP style socket */ 2480 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2481 SCTP_PCB_FLAGS_UNBOUND); 2482 /* Be sure it is NON-BLOCKING IO for UDP */ 2483 /* SCTP_SET_SO_NBIO(so); */ 2484 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2485 /* TCP style socket */ 2486 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2487 SCTP_PCB_FLAGS_UNBOUND); 2488 /* Be sure we have blocking IO by default */ 2489 SOCK_LOCK(so); 2490 SCTP_CLEAR_SO_NBIO(so); 2491 SOCK_UNLOCK(so); 2492 } else { 2493 /* 2494 * unsupported socket type (RAW, etc)- in case we missed it 2495 * in protosw 2496 */ 2497 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2498 so->so_pcb = NULL; 2499 crfree(inp->ip_inp.inp.inp_cred); 2500 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2501 return (EOPNOTSUPP); 2502 } 2503 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2504 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2505 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2506 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2507 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2508 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2509 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2510 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2511 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2512 } 2513 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2514 &inp->sctp_hashmark); 2515 if (inp->sctp_tcbhash == NULL) { 2516 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2517 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2518 so->so_pcb = NULL; 2519 crfree(inp->ip_inp.inp.inp_cred); 2520 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2521 return (ENOBUFS); 2522 } 2523 inp->def_vrf_id = vrf_id; 2524 2525 SCTP_INP_INFO_WLOCK(); 2526 SCTP_INP_LOCK_INIT(inp); 2527 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2528 SCTP_INP_READ_INIT(inp); 2529 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2530 /* lock the new ep */ 2531 SCTP_INP_WLOCK(inp); 2532 2533 /* add it to the info area */ 2534 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2535 SCTP_INP_INFO_WUNLOCK(); 2536 2537 TAILQ_INIT(&inp->read_queue); 2538 LIST_INIT(&inp->sctp_addr_list); 2539 2540 LIST_INIT(&inp->sctp_asoc_list); 2541 2542 #ifdef SCTP_TRACK_FREED_ASOCS 2543 /* TEMP CODE */ 2544 LIST_INIT(&inp->sctp_asoc_free_list); 2545 #endif 2546 /* Init the timer structure for signature change */ 2547 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2548 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2549 2550 /* now init the actual endpoint default data */ 2551 m = &inp->sctp_ep; 2552 2553 /* setup the base timeout information */ 2554 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2555 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2556 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2557 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2558 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2559 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2560 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2561 /* all max/min max are in ms */ 2562 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2563 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2564 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2565 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2566 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2567 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2568 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2569 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2570 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2571 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2572 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2573 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2574 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2575 2576 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2577 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2578 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2579 /* number of streams to pre-open on a association */ 2580 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2581 2582 m->default_mtu = 0; 2583 /* Add adaptation cookie */ 2584 m->adaptation_layer_indicator = 0; 2585 m->adaptation_layer_indicator_provided = 0; 2586 2587 /* seed random number generator */ 2588 m->random_counter = 1; 2589 m->store_at = SCTP_SIGNATURE_SIZE; 2590 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2591 sctp_fill_random_store(m); 2592 2593 /* Minimum cookie size */ 2594 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2595 sizeof(struct sctp_state_cookie); 2596 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2597 2598 /* Setup the initial secret */ 2599 (void)SCTP_GETTIME_TIMEVAL(&time); 2600 m->time_of_secret_change = time.tv_sec; 2601 2602 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2603 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2604 } 2605 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2606 2607 /* How long is a cookie good for ? */ 2608 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2609 /* 2610 * Initialize authentication parameters 2611 */ 2612 m->local_hmacs = sctp_default_supported_hmaclist(); 2613 m->local_auth_chunks = sctp_alloc_chunklist(); 2614 if (inp->asconf_supported) { 2615 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2616 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2617 } 2618 m->default_dscp = 0; 2619 #ifdef INET6 2620 m->default_flowlabel = 0; 2621 #endif 2622 m->port = 0; /* encapsulation disabled by default */ 2623 LIST_INIT(&m->shared_keys); 2624 /* add default NULL key as key id 0 */ 2625 null_key = sctp_alloc_sharedkey(); 2626 sctp_insert_sharedkey(&m->shared_keys, null_key); 2627 SCTP_INP_WUNLOCK(inp); 2628 #ifdef SCTP_LOG_CLOSING 2629 sctp_log_closing(inp, NULL, 12); 2630 #endif 2631 return (error); 2632 } 2633 2634 2635 void 2636 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2637 struct sctp_tcb *stcb) 2638 { 2639 struct sctp_nets *net; 2640 uint16_t lport, rport; 2641 struct sctppcbhead *head; 2642 struct sctp_laddr *laddr, *oladdr; 2643 2644 atomic_add_int(&stcb->asoc.refcnt, 1); 2645 SCTP_TCB_UNLOCK(stcb); 2646 SCTP_INP_INFO_WLOCK(); 2647 SCTP_INP_WLOCK(old_inp); 2648 SCTP_INP_WLOCK(new_inp); 2649 SCTP_TCB_LOCK(stcb); 2650 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2651 2652 new_inp->sctp_ep.time_of_secret_change = 2653 old_inp->sctp_ep.time_of_secret_change; 2654 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2655 sizeof(old_inp->sctp_ep.secret_key)); 2656 new_inp->sctp_ep.current_secret_number = 2657 old_inp->sctp_ep.current_secret_number; 2658 new_inp->sctp_ep.last_secret_number = 2659 old_inp->sctp_ep.last_secret_number; 2660 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2661 2662 /* make it so new data pours into the new socket */ 2663 stcb->sctp_socket = new_inp->sctp_socket; 2664 stcb->sctp_ep = new_inp; 2665 2666 /* Copy the port across */ 2667 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2668 rport = stcb->rport; 2669 /* Pull the tcb from the old association */ 2670 LIST_REMOVE(stcb, sctp_tcbhash); 2671 LIST_REMOVE(stcb, sctp_tcblist); 2672 if (stcb->asoc.in_asocid_hash) { 2673 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2674 } 2675 /* Now insert the new_inp into the TCP connected hash */ 2676 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2677 2678 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2679 /* Its safe to access */ 2680 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2681 2682 /* Now move the tcb into the endpoint list */ 2683 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2684 /* 2685 * Question, do we even need to worry about the ep-hash since we 2686 * only have one connection? Probably not :> so lets get rid of it 2687 * and not suck up any kernel memory in that. 2688 */ 2689 if (stcb->asoc.in_asocid_hash) { 2690 struct sctpasochead *lhd; 2691 2692 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2693 new_inp->hashasocidmark)]; 2694 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2695 } 2696 /* Ok. Let's restart timer. */ 2697 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2698 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2699 stcb, net); 2700 } 2701 2702 SCTP_INP_INFO_WUNLOCK(); 2703 if (new_inp->sctp_tcbhash != NULL) { 2704 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2705 new_inp->sctp_tcbhash = NULL; 2706 } 2707 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2708 /* Subset bound, so copy in the laddr list from the old_inp */ 2709 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2710 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2711 if (laddr == NULL) { 2712 /* 2713 * Gak, what can we do? This assoc is really 2714 * HOSED. We probably should send an abort 2715 * here. 2716 */ 2717 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2718 continue; 2719 } 2720 SCTP_INCR_LADDR_COUNT(); 2721 memset(laddr, 0, sizeof(*laddr)); 2722 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2723 laddr->ifa = oladdr->ifa; 2724 atomic_add_int(&laddr->ifa->refcount, 1); 2725 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2726 sctp_nxt_addr); 2727 new_inp->laddr_count++; 2728 if (oladdr == stcb->asoc.last_used_address) { 2729 stcb->asoc.last_used_address = laddr; 2730 } 2731 } 2732 } 2733 /* 2734 * Now any running timers need to be adjusted since we really don't 2735 * care if they are running or not just blast in the new_inp into 2736 * all of them. 2737 */ 2738 2739 stcb->asoc.dack_timer.ep = (void *)new_inp; 2740 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2741 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2742 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2743 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2744 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2745 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2746 /* now what about the nets? */ 2747 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2748 net->pmtu_timer.ep = (void *)new_inp; 2749 net->hb_timer.ep = (void *)new_inp; 2750 net->rxt_timer.ep = (void *)new_inp; 2751 } 2752 SCTP_INP_WUNLOCK(new_inp); 2753 SCTP_INP_WUNLOCK(old_inp); 2754 } 2755 2756 /* 2757 * insert an laddr entry with the given ifa for the desired list 2758 */ 2759 static int 2760 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2761 { 2762 struct sctp_laddr *laddr; 2763 2764 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2765 if (laddr == NULL) { 2766 /* out of memory? */ 2767 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2768 return (EINVAL); 2769 } 2770 SCTP_INCR_LADDR_COUNT(); 2771 memset(laddr, 0, sizeof(*laddr)); 2772 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2773 laddr->ifa = ifa; 2774 laddr->action = act; 2775 atomic_add_int(&ifa->refcount, 1); 2776 /* insert it */ 2777 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2778 2779 return (0); 2780 } 2781 2782 /* 2783 * Remove an laddr entry from the local address list (on an assoc) 2784 */ 2785 static void 2786 sctp_remove_laddr(struct sctp_laddr *laddr) 2787 { 2788 2789 /* remove from the list */ 2790 LIST_REMOVE(laddr, sctp_nxt_addr); 2791 sctp_free_ifa(laddr->ifa); 2792 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2793 SCTP_DECR_LADDR_COUNT(); 2794 } 2795 2796 2797 2798 /* sctp_ifap is used to bypass normal local address validation checks */ 2799 int 2800 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2801 struct sctp_ifa *sctp_ifap, struct thread *p) 2802 { 2803 /* bind a ep to a socket address */ 2804 struct sctppcbhead *head; 2805 struct sctp_inpcb *inp, *inp_tmp; 2806 struct inpcb *ip_inp; 2807 int port_reuse_active = 0; 2808 int bindall; 2809 uint16_t lport; 2810 int error; 2811 uint32_t vrf_id; 2812 2813 lport = 0; 2814 bindall = 1; 2815 inp = (struct sctp_inpcb *)so->so_pcb; 2816 ip_inp = (struct inpcb *)so->so_pcb; 2817 #ifdef SCTP_DEBUG 2818 if (addr) { 2819 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2820 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2821 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2822 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2823 } 2824 #endif 2825 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2826 /* already did a bind, subsequent binds NOT allowed ! */ 2827 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2828 return (EINVAL); 2829 } 2830 #ifdef INVARIANTS 2831 if (p == NULL) 2832 panic("null proc/thread"); 2833 #endif 2834 if (addr != NULL) { 2835 switch (addr->sa_family) { 2836 #ifdef INET 2837 case AF_INET: 2838 { 2839 struct sockaddr_in *sin; 2840 2841 /* IPV6_V6ONLY socket? */ 2842 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2843 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2844 return (EINVAL); 2845 } 2846 if (addr->sa_len != sizeof(*sin)) { 2847 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2848 return (EINVAL); 2849 } 2850 sin = (struct sockaddr_in *)addr; 2851 lport = sin->sin_port; 2852 /* 2853 * For LOOPBACK the prison_local_ip4() call 2854 * will transmute the ip address to the 2855 * proper value. 2856 */ 2857 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2858 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2859 return (error); 2860 } 2861 if (sin->sin_addr.s_addr != INADDR_ANY) { 2862 bindall = 0; 2863 } 2864 break; 2865 } 2866 #endif 2867 #ifdef INET6 2868 case AF_INET6: 2869 { 2870 /* 2871 * Only for pure IPv6 Address. (No IPv4 2872 * Mapped!) 2873 */ 2874 struct sockaddr_in6 *sin6; 2875 2876 sin6 = (struct sockaddr_in6 *)addr; 2877 2878 if (addr->sa_len != sizeof(*sin6)) { 2879 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2880 return (EINVAL); 2881 } 2882 lport = sin6->sin6_port; 2883 /* 2884 * For LOOPBACK the prison_local_ip6() call 2885 * will transmute the ipv6 address to the 2886 * proper value. 2887 */ 2888 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2889 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2890 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2891 return (error); 2892 } 2893 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2894 bindall = 0; 2895 /* KAME hack: embed scopeid */ 2896 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2897 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2898 return (EINVAL); 2899 } 2900 } 2901 /* this must be cleared for ifa_ifwithaddr() */ 2902 sin6->sin6_scope_id = 0; 2903 break; 2904 } 2905 #endif 2906 default: 2907 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2908 return (EAFNOSUPPORT); 2909 } 2910 } 2911 SCTP_INP_INFO_WLOCK(); 2912 SCTP_INP_WLOCK(inp); 2913 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2914 vrf_id = inp->def_vrf_id; 2915 2916 /* increase our count due to the unlock we do */ 2917 SCTP_INP_INCR_REF(inp); 2918 if (lport) { 2919 /* 2920 * Did the caller specify a port? if so we must see if an ep 2921 * already has this one bound. 2922 */ 2923 /* got to be root to get at low ports */ 2924 if (ntohs(lport) < IPPORT_RESERVED) { 2925 if ((p != NULL) && ((error = 2926 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2927 ) != 0)) { 2928 SCTP_INP_DECR_REF(inp); 2929 SCTP_INP_WUNLOCK(inp); 2930 SCTP_INP_INFO_WUNLOCK(); 2931 return (error); 2932 } 2933 } 2934 SCTP_INP_WUNLOCK(inp); 2935 if (bindall) { 2936 vrf_id = inp->def_vrf_id; 2937 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2938 if (inp_tmp != NULL) { 2939 /* 2940 * lock guy returned and lower count note 2941 * that we are not bound so inp_tmp should 2942 * NEVER be inp. And it is this inp 2943 * (inp_tmp) that gets the reference bump, 2944 * so we must lower it. 2945 */ 2946 SCTP_INP_DECR_REF(inp_tmp); 2947 /* unlock info */ 2948 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2949 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2950 /* 2951 * Ok, must be one-2-one and 2952 * allowing port re-use 2953 */ 2954 port_reuse_active = 1; 2955 goto continue_anyway; 2956 } 2957 SCTP_INP_DECR_REF(inp); 2958 SCTP_INP_INFO_WUNLOCK(); 2959 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2960 return (EADDRINUSE); 2961 } 2962 } else { 2963 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2964 if (inp_tmp != NULL) { 2965 /* 2966 * lock guy returned and lower count note 2967 * that we are not bound so inp_tmp should 2968 * NEVER be inp. And it is this inp 2969 * (inp_tmp) that gets the reference bump, 2970 * so we must lower it. 2971 */ 2972 SCTP_INP_DECR_REF(inp_tmp); 2973 /* unlock info */ 2974 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2975 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2976 /* 2977 * Ok, must be one-2-one and 2978 * allowing port re-use 2979 */ 2980 port_reuse_active = 1; 2981 goto continue_anyway; 2982 } 2983 SCTP_INP_DECR_REF(inp); 2984 SCTP_INP_INFO_WUNLOCK(); 2985 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2986 return (EADDRINUSE); 2987 } 2988 } 2989 continue_anyway: 2990 SCTP_INP_WLOCK(inp); 2991 if (bindall) { 2992 /* verify that no lport is not used by a singleton */ 2993 if ((port_reuse_active == 0) && 2994 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2995 /* Sorry someone already has this one bound */ 2996 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2997 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2998 port_reuse_active = 1; 2999 } else { 3000 SCTP_INP_DECR_REF(inp); 3001 SCTP_INP_WUNLOCK(inp); 3002 SCTP_INP_INFO_WUNLOCK(); 3003 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3004 return (EADDRINUSE); 3005 } 3006 } 3007 } 3008 } else { 3009 uint16_t first, last, candidate; 3010 uint16_t count; 3011 int done; 3012 3013 if (ip_inp->inp_flags & INP_HIGHPORT) { 3014 first = MODULE_GLOBAL(ipport_hifirstauto); 3015 last = MODULE_GLOBAL(ipport_hilastauto); 3016 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3017 if (p && (error = 3018 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3019 )) { 3020 SCTP_INP_DECR_REF(inp); 3021 SCTP_INP_WUNLOCK(inp); 3022 SCTP_INP_INFO_WUNLOCK(); 3023 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3024 return (error); 3025 } 3026 first = MODULE_GLOBAL(ipport_lowfirstauto); 3027 last = MODULE_GLOBAL(ipport_lowlastauto); 3028 } else { 3029 first = MODULE_GLOBAL(ipport_firstauto); 3030 last = MODULE_GLOBAL(ipport_lastauto); 3031 } 3032 if (first > last) { 3033 uint16_t temp; 3034 3035 temp = first; 3036 first = last; 3037 last = temp; 3038 } 3039 count = last - first + 1; /* number of candidates */ 3040 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3041 3042 done = 0; 3043 while (!done) { 3044 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3045 done = 1; 3046 } 3047 if (!done) { 3048 if (--count == 0) { 3049 SCTP_INP_DECR_REF(inp); 3050 SCTP_INP_WUNLOCK(inp); 3051 SCTP_INP_INFO_WUNLOCK(); 3052 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3053 return (EADDRINUSE); 3054 } 3055 if (candidate == last) 3056 candidate = first; 3057 else 3058 candidate = candidate + 1; 3059 } 3060 } 3061 lport = htons(candidate); 3062 } 3063 SCTP_INP_DECR_REF(inp); 3064 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3065 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3066 /* 3067 * this really should not happen. The guy did a non-blocking 3068 * bind and then did a close at the same time. 3069 */ 3070 SCTP_INP_WUNLOCK(inp); 3071 SCTP_INP_INFO_WUNLOCK(); 3072 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3073 return (EINVAL); 3074 } 3075 /* ok we look clear to give out this port, so lets setup the binding */ 3076 if (bindall) { 3077 /* binding to all addresses, so just set in the proper flags */ 3078 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3079 /* set the automatic addr changes from kernel flag */ 3080 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3081 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3082 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3083 } else { 3084 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3085 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3086 } 3087 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3088 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3089 } else { 3090 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3091 } 3092 /* 3093 * set the automatic mobility_base from kernel flag (by 3094 * micchie) 3095 */ 3096 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3097 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3098 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3099 } else { 3100 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3101 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3102 } 3103 /* 3104 * set the automatic mobility_fasthandoff from kernel flag 3105 * (by micchie) 3106 */ 3107 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3109 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3110 } else { 3111 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3112 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3113 } 3114 } else { 3115 /* 3116 * bind specific, make sure flags is off and add a new 3117 * address structure to the sctp_addr_list inside the ep 3118 * structure. 3119 * 3120 * We will need to allocate one and insert it at the head. 3121 * The socketopt call can just insert new addresses in there 3122 * as well. It will also have to do the embed scope kame 3123 * hack too (before adding). 3124 */ 3125 struct sctp_ifa *ifa; 3126 union sctp_sockstore store; 3127 3128 memset(&store, 0, sizeof(store)); 3129 switch (addr->sa_family) { 3130 #ifdef INET 3131 case AF_INET: 3132 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3133 store.sin.sin_port = 0; 3134 break; 3135 #endif 3136 #ifdef INET6 3137 case AF_INET6: 3138 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3139 store.sin6.sin6_port = 0; 3140 break; 3141 #endif 3142 default: 3143 break; 3144 } 3145 /* 3146 * first find the interface with the bound address need to 3147 * zero out the port to find the address! yuck! can't do 3148 * this earlier since need port for sctp_pcb_findep() 3149 */ 3150 if (sctp_ifap != NULL) { 3151 ifa = sctp_ifap; 3152 } else { 3153 /* 3154 * Note for BSD we hit here always other O/S's will 3155 * pass things in via the sctp_ifap argument 3156 * (Panda). 3157 */ 3158 ifa = sctp_find_ifa_by_addr(&store.sa, 3159 vrf_id, SCTP_ADDR_NOT_LOCKED); 3160 } 3161 if (ifa == NULL) { 3162 /* Can't find an interface with that address */ 3163 SCTP_INP_WUNLOCK(inp); 3164 SCTP_INP_INFO_WUNLOCK(); 3165 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3166 return (EADDRNOTAVAIL); 3167 } 3168 #ifdef INET6 3169 if (addr->sa_family == AF_INET6) { 3170 /* GAK, more FIXME IFA lock? */ 3171 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3172 /* Can't bind a non-existent addr. */ 3173 SCTP_INP_WUNLOCK(inp); 3174 SCTP_INP_INFO_WUNLOCK(); 3175 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3176 return (EINVAL); 3177 } 3178 } 3179 #endif 3180 /* we're not bound all */ 3181 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3182 /* allow bindx() to send ASCONF's for binding changes */ 3183 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3184 /* clear automatic addr changes from kernel flag */ 3185 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3186 3187 /* add this address to the endpoint list */ 3188 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3189 if (error != 0) { 3190 SCTP_INP_WUNLOCK(inp); 3191 SCTP_INP_INFO_WUNLOCK(); 3192 return (error); 3193 } 3194 inp->laddr_count++; 3195 } 3196 /* find the bucket */ 3197 if (port_reuse_active) { 3198 /* Put it into tcp 1-2-1 hash */ 3199 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3200 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3201 } else { 3202 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3203 } 3204 /* put it in the bucket */ 3205 LIST_INSERT_HEAD(head, inp, sctp_hash); 3206 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3207 (void *)head, ntohs(lport), port_reuse_active); 3208 /* set in the port */ 3209 inp->sctp_lport = lport; 3210 3211 /* turn off just the unbound flag */ 3212 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3213 SCTP_INP_WUNLOCK(inp); 3214 SCTP_INP_INFO_WUNLOCK(); 3215 return (0); 3216 } 3217 3218 3219 static void 3220 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3221 { 3222 struct sctp_iterator *it, *nit; 3223 3224 /* 3225 * We enter with the only the ITERATOR_LOCK in place and a write 3226 * lock on the inp_info stuff. 3227 */ 3228 it = sctp_it_ctl.cur_it; 3229 if (it && (it->vn != curvnet)) { 3230 /* Its not looking at our VNET */ 3231 return; 3232 } 3233 if (it && (it->inp == inp)) { 3234 /* 3235 * This is tricky and we hold the iterator lock, but when it 3236 * returns and gets the lock (when we release it) the 3237 * iterator will try to operate on inp. We need to stop that 3238 * from happening. But of course the iterator has a 3239 * reference on the stcb and inp. We can mark it and it will 3240 * stop. 3241 * 3242 * If its a single iterator situation, we set the end 3243 * iterator flag. Otherwise we set the iterator to go to the 3244 * next inp. 3245 * 3246 */ 3247 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3248 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3249 } else { 3250 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3251 } 3252 } 3253 /* 3254 * Now go through and remove any single reference to our inp that 3255 * may be still pending on the list 3256 */ 3257 SCTP_IPI_ITERATOR_WQ_LOCK(); 3258 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3259 if (it->vn != curvnet) { 3260 continue; 3261 } 3262 if (it->inp == inp) { 3263 /* This one points to me is it inp specific? */ 3264 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3265 /* Remove and free this one */ 3266 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3267 it, sctp_nxt_itr); 3268 if (it->function_atend != NULL) { 3269 (*it->function_atend) (it->pointer, it->val); 3270 } 3271 SCTP_FREE(it, SCTP_M_ITER); 3272 } else { 3273 it->inp = LIST_NEXT(it->inp, sctp_list); 3274 if (it->inp) { 3275 SCTP_INP_INCR_REF(it->inp); 3276 } 3277 } 3278 /* 3279 * When its put in the refcnt is incremented so decr 3280 * it 3281 */ 3282 SCTP_INP_DECR_REF(inp); 3283 } 3284 } 3285 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3286 } 3287 3288 /* release sctp_inpcb unbind the port */ 3289 void 3290 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3291 { 3292 /* 3293 * Here we free a endpoint. We must find it (if it is in the Hash 3294 * table) and remove it from there. Then we must also find it in the 3295 * overall list and remove it from there. After all removals are 3296 * complete then any timer has to be stopped. Then start the actual 3297 * freeing. a) Any local lists. b) Any associations. c) The hash of 3298 * all associations. d) finally the ep itself. 3299 */ 3300 struct sctp_tcb *asoc, *nasoc; 3301 struct sctp_laddr *laddr, *nladdr; 3302 struct inpcb *ip_pcb; 3303 struct socket *so; 3304 int being_refed = 0; 3305 struct sctp_queued_to_read *sq, *nsq; 3306 int cnt; 3307 sctp_sharedkey_t *shared_key, *nshared_key; 3308 3309 3310 #ifdef SCTP_LOG_CLOSING 3311 sctp_log_closing(inp, NULL, 0); 3312 #endif 3313 SCTP_ITERATOR_LOCK(); 3314 /* mark any iterators on the list or being processed */ 3315 sctp_iterator_inp_being_freed(inp); 3316 SCTP_ITERATOR_UNLOCK(); 3317 so = inp->sctp_socket; 3318 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3319 /* been here before.. eeks.. get out of here */ 3320 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3321 #ifdef SCTP_LOG_CLOSING 3322 sctp_log_closing(inp, NULL, 1); 3323 #endif 3324 return; 3325 } 3326 SCTP_ASOC_CREATE_LOCK(inp); 3327 SCTP_INP_INFO_WLOCK(); 3328 3329 SCTP_INP_WLOCK(inp); 3330 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3331 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3332 /* socket is gone, so no more wakeups allowed */ 3333 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3334 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3335 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3336 3337 } 3338 /* First time through we have the socket lock, after that no more. */ 3339 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3340 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3341 3342 if (inp->control) { 3343 sctp_m_freem(inp->control); 3344 inp->control = NULL; 3345 } 3346 if (inp->pkt) { 3347 sctp_m_freem(inp->pkt); 3348 inp->pkt = NULL; 3349 } 3350 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3351 * here but I will be nice :> (i.e. 3352 * ip_pcb = ep;) */ 3353 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3354 int cnt_in_sd; 3355 3356 cnt_in_sd = 0; 3357 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3358 SCTP_TCB_LOCK(asoc); 3359 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3360 /* Skip guys being freed */ 3361 cnt_in_sd++; 3362 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3363 /* 3364 * Special case - we did not start a 3365 * kill timer on the asoc due to it 3366 * was not closed. So go ahead and 3367 * start it now. 3368 */ 3369 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3370 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3371 } 3372 SCTP_TCB_UNLOCK(asoc); 3373 continue; 3374 } 3375 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3376 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3377 (asoc->asoc.total_output_queue_size == 0)) { 3378 /* 3379 * If we have data in queue, we don't want 3380 * to just free since the app may have done, 3381 * send()/close or connect/send/close. And 3382 * it wants the data to get across first. 3383 */ 3384 /* Just abandon things in the front states */ 3385 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3386 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3387 cnt_in_sd++; 3388 } 3389 continue; 3390 } 3391 /* Disconnect the socket please */ 3392 asoc->sctp_socket = NULL; 3393 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3394 if ((asoc->asoc.size_on_reasm_queue > 0) || 3395 (asoc->asoc.control_pdapi) || 3396 (asoc->asoc.size_on_all_streams > 0) || 3397 (so && (so->so_rcv.sb_cc > 0))) { 3398 /* Left with Data unread */ 3399 struct mbuf *op_err; 3400 3401 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3402 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3403 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3404 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3405 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3406 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3407 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3408 } 3409 if (sctp_free_assoc(inp, asoc, 3410 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3411 cnt_in_sd++; 3412 } 3413 continue; 3414 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3415 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3416 (asoc->asoc.stream_queue_cnt == 0)) { 3417 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3418 goto abort_anyway; 3419 } 3420 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3421 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3422 struct sctp_nets *netp; 3423 3424 /* 3425 * there is nothing queued to send, 3426 * so I send shutdown 3427 */ 3428 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3429 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3430 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3431 } 3432 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3433 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3434 sctp_stop_timers_for_shutdown(asoc); 3435 if (asoc->asoc.alternate) { 3436 netp = asoc->asoc.alternate; 3437 } else { 3438 netp = asoc->asoc.primary_destination; 3439 } 3440 sctp_send_shutdown(asoc, netp); 3441 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3442 netp); 3443 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3444 asoc->asoc.primary_destination); 3445 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3446 } 3447 } else { 3448 /* mark into shutdown pending */ 3449 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3450 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3451 asoc->asoc.primary_destination); 3452 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3453 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3454 } 3455 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3456 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3457 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3458 struct mbuf *op_err; 3459 3460 abort_anyway: 3461 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3462 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3463 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3464 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3465 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3466 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3467 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3468 } 3469 if (sctp_free_assoc(inp, asoc, 3470 SCTP_PCBFREE_NOFORCE, 3471 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3472 cnt_in_sd++; 3473 } 3474 continue; 3475 } else { 3476 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3477 } 3478 } 3479 cnt_in_sd++; 3480 SCTP_TCB_UNLOCK(asoc); 3481 } 3482 /* now is there some left in our SHUTDOWN state? */ 3483 if (cnt_in_sd) { 3484 #ifdef SCTP_LOG_CLOSING 3485 sctp_log_closing(inp, NULL, 2); 3486 #endif 3487 inp->sctp_socket = NULL; 3488 SCTP_INP_WUNLOCK(inp); 3489 SCTP_ASOC_CREATE_UNLOCK(inp); 3490 SCTP_INP_INFO_WUNLOCK(); 3491 return; 3492 } 3493 } 3494 inp->sctp_socket = NULL; 3495 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3496 SCTP_PCB_FLAGS_UNBOUND) { 3497 /* 3498 * ok, this guy has been bound. It's port is somewhere in 3499 * the SCTP_BASE_INFO(hash table). Remove it! 3500 */ 3501 LIST_REMOVE(inp, sctp_hash); 3502 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3503 } 3504 /* 3505 * If there is a timer running to kill us, forget it, since it may 3506 * have a contest on the INP lock.. which would cause us to die ... 3507 */ 3508 cnt = 0; 3509 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3510 SCTP_TCB_LOCK(asoc); 3511 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3512 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3513 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3514 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3515 } 3516 cnt++; 3517 SCTP_TCB_UNLOCK(asoc); 3518 continue; 3519 } 3520 /* Free associations that are NOT killing us */ 3521 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3522 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3523 struct mbuf *op_err; 3524 3525 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3526 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3527 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3528 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3529 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3530 cnt++; 3531 SCTP_TCB_UNLOCK(asoc); 3532 continue; 3533 } 3534 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3535 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3536 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3537 } 3538 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3539 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3540 cnt++; 3541 } 3542 } 3543 if (cnt) { 3544 /* Ok we have someone out there that will kill us */ 3545 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3546 #ifdef SCTP_LOG_CLOSING 3547 sctp_log_closing(inp, NULL, 3); 3548 #endif 3549 SCTP_INP_WUNLOCK(inp); 3550 SCTP_ASOC_CREATE_UNLOCK(inp); 3551 SCTP_INP_INFO_WUNLOCK(); 3552 return; 3553 } 3554 if (SCTP_INP_LOCK_CONTENDED(inp)) 3555 being_refed++; 3556 if (SCTP_INP_READ_CONTENDED(inp)) 3557 being_refed++; 3558 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3559 being_refed++; 3560 3561 if ((inp->refcount) || 3562 (being_refed) || 3563 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3564 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3565 #ifdef SCTP_LOG_CLOSING 3566 sctp_log_closing(inp, NULL, 4); 3567 #endif 3568 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3569 SCTP_INP_WUNLOCK(inp); 3570 SCTP_ASOC_CREATE_UNLOCK(inp); 3571 SCTP_INP_INFO_WUNLOCK(); 3572 return; 3573 } 3574 inp->sctp_ep.signature_change.type = 0; 3575 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3576 /* 3577 * Remove it from the list .. last thing we need a lock for. 3578 */ 3579 LIST_REMOVE(inp, sctp_list); 3580 SCTP_INP_WUNLOCK(inp); 3581 SCTP_ASOC_CREATE_UNLOCK(inp); 3582 SCTP_INP_INFO_WUNLOCK(); 3583 /* 3584 * Now we release all locks. Since this INP cannot be found anymore 3585 * except possibly by the kill timer that might be running. We call 3586 * the drain function here. It should hit the case were it sees the 3587 * ACTIVE flag cleared and exit out freeing us to proceed and 3588 * destroy everything. 3589 */ 3590 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3591 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3592 } else { 3593 /* Probably un-needed */ 3594 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3595 } 3596 3597 #ifdef SCTP_LOG_CLOSING 3598 sctp_log_closing(inp, NULL, 5); 3599 #endif 3600 3601 3602 if ((inp->sctp_asocidhash) != NULL) { 3603 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3604 inp->sctp_asocidhash = NULL; 3605 } 3606 /* sa_ignore FREED_MEMORY */ 3607 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3608 /* Its only abandoned if it had data left */ 3609 if (sq->length) 3610 SCTP_STAT_INCR(sctps_left_abandon); 3611 3612 TAILQ_REMOVE(&inp->read_queue, sq, next); 3613 sctp_free_remote_addr(sq->whoFrom); 3614 if (so) 3615 so->so_rcv.sb_cc -= sq->length; 3616 if (sq->data) { 3617 sctp_m_freem(sq->data); 3618 sq->data = NULL; 3619 } 3620 /* 3621 * no need to free the net count, since at this point all 3622 * assoc's are gone. 3623 */ 3624 sctp_free_a_readq(NULL, sq); 3625 } 3626 /* Now the sctp_pcb things */ 3627 /* 3628 * free each asoc if it is not already closed/free. we can't use the 3629 * macro here since le_next will get freed as part of the 3630 * sctp_free_assoc() call. 3631 */ 3632 if (ip_pcb->inp_options) { 3633 (void)sctp_m_free(ip_pcb->inp_options); 3634 ip_pcb->inp_options = 0; 3635 } 3636 #ifdef INET6 3637 if (ip_pcb->inp_vflag & INP_IPV6) { 3638 struct in6pcb *in6p; 3639 3640 in6p = (struct in6pcb *)inp; 3641 ip6_freepcbopts(in6p->in6p_outputopts); 3642 } 3643 #endif /* INET6 */ 3644 ip_pcb->inp_vflag = 0; 3645 /* free up authentication fields */ 3646 if (inp->sctp_ep.local_auth_chunks != NULL) 3647 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3648 if (inp->sctp_ep.local_hmacs != NULL) 3649 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3650 3651 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3652 LIST_REMOVE(shared_key, next); 3653 sctp_free_sharedkey(shared_key); 3654 /* sa_ignore FREED_MEMORY */ 3655 } 3656 3657 /* 3658 * if we have an address list the following will free the list of 3659 * ifaddr's that are set into this ep. Again macro limitations here, 3660 * since the LIST_FOREACH could be a bad idea. 3661 */ 3662 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3663 sctp_remove_laddr(laddr); 3664 } 3665 3666 #ifdef SCTP_TRACK_FREED_ASOCS 3667 /* TEMP CODE */ 3668 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3669 LIST_REMOVE(asoc, sctp_tcblist); 3670 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3671 SCTP_DECR_ASOC_COUNT(); 3672 } 3673 /* *** END TEMP CODE *** */ 3674 #endif 3675 /* Now lets see about freeing the EP hash table. */ 3676 if (inp->sctp_tcbhash != NULL) { 3677 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3678 inp->sctp_tcbhash = NULL; 3679 } 3680 /* Now we must put the ep memory back into the zone pool */ 3681 crfree(inp->ip_inp.inp.inp_cred); 3682 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3683 SCTP_INP_LOCK_DESTROY(inp); 3684 SCTP_INP_READ_DESTROY(inp); 3685 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3686 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3687 SCTP_DECR_EP_COUNT(); 3688 } 3689 3690 3691 struct sctp_nets * 3692 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3693 { 3694 struct sctp_nets *net; 3695 3696 /* locate the address */ 3697 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3698 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3699 return (net); 3700 } 3701 return (NULL); 3702 } 3703 3704 3705 int 3706 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3707 { 3708 struct sctp_ifa *sctp_ifa; 3709 3710 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3711 if (sctp_ifa) { 3712 return (1); 3713 } else { 3714 return (0); 3715 } 3716 } 3717 3718 /* 3719 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3720 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3721 * stats of stuff. 3722 */ 3723 int 3724 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3725 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3726 { 3727 /* 3728 * The following is redundant to the same lines in the 3729 * sctp_aloc_assoc() but is needed since others call the add address 3730 * function 3731 */ 3732 struct sctp_nets *net, *netfirst; 3733 int addr_inscope; 3734 3735 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3736 from); 3737 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3738 3739 netfirst = sctp_findnet(stcb, newaddr); 3740 if (netfirst) { 3741 /* 3742 * Lie and return ok, we don't want to make the association 3743 * go away for this behavior. It will happen in the TCP 3744 * model in a connected socket. It does not reach the hash 3745 * table until after the association is built so it can't be 3746 * found. Mark as reachable, since the initial creation will 3747 * have been cleared and the NOT_IN_ASSOC flag will have 3748 * been added... and we don't want to end up removing it 3749 * back out. 3750 */ 3751 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3752 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3753 SCTP_ADDR_UNCONFIRMED); 3754 } else { 3755 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3756 } 3757 3758 return (0); 3759 } 3760 addr_inscope = 1; 3761 switch (newaddr->sa_family) { 3762 #ifdef INET 3763 case AF_INET: 3764 { 3765 struct sockaddr_in *sin; 3766 3767 sin = (struct sockaddr_in *)newaddr; 3768 if (sin->sin_addr.s_addr == 0) { 3769 /* Invalid address */ 3770 return (-1); 3771 } 3772 /* zero out the zero area */ 3773 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3774 3775 /* assure len is set */ 3776 sin->sin_len = sizeof(struct sockaddr_in); 3777 if (set_scope) { 3778 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3779 stcb->asoc.scope.ipv4_local_scope = 1; 3780 } 3781 } else { 3782 /* Validate the address is in scope */ 3783 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3784 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3785 addr_inscope = 0; 3786 } 3787 } 3788 break; 3789 } 3790 #endif 3791 #ifdef INET6 3792 case AF_INET6: 3793 { 3794 struct sockaddr_in6 *sin6; 3795 3796 sin6 = (struct sockaddr_in6 *)newaddr; 3797 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3798 /* Invalid address */ 3799 return (-1); 3800 } 3801 /* assure len is set */ 3802 sin6->sin6_len = sizeof(struct sockaddr_in6); 3803 if (set_scope) { 3804 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3805 stcb->asoc.scope.loopback_scope = 1; 3806 stcb->asoc.scope.local_scope = 0; 3807 stcb->asoc.scope.ipv4_local_scope = 1; 3808 stcb->asoc.scope.site_scope = 1; 3809 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3810 /* 3811 * If the new destination is a 3812 * LINK_LOCAL we must have common 3813 * site scope. Don't set the local 3814 * scope since we may not share all 3815 * links, only loopback can do this. 3816 * Links on the local network would 3817 * also be on our private network 3818 * for v4 too. 3819 */ 3820 stcb->asoc.scope.ipv4_local_scope = 1; 3821 stcb->asoc.scope.site_scope = 1; 3822 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3823 /* 3824 * If the new destination is 3825 * SITE_LOCAL then we must have site 3826 * scope in common. 3827 */ 3828 stcb->asoc.scope.site_scope = 1; 3829 } 3830 } else { 3831 /* Validate the address is in scope */ 3832 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3833 (stcb->asoc.scope.loopback_scope == 0)) { 3834 addr_inscope = 0; 3835 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3836 (stcb->asoc.scope.local_scope == 0)) { 3837 addr_inscope = 0; 3838 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3839 (stcb->asoc.scope.site_scope == 0)) { 3840 addr_inscope = 0; 3841 } 3842 } 3843 break; 3844 } 3845 #endif 3846 default: 3847 /* not supported family type */ 3848 return (-1); 3849 } 3850 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3851 if (net == NULL) { 3852 return (-1); 3853 } 3854 SCTP_INCR_RADDR_COUNT(); 3855 memset(net, 0, sizeof(struct sctp_nets)); 3856 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3857 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3858 switch (newaddr->sa_family) { 3859 #ifdef INET 3860 case AF_INET: 3861 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3862 break; 3863 #endif 3864 #ifdef INET6 3865 case AF_INET6: 3866 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3867 break; 3868 #endif 3869 default: 3870 break; 3871 } 3872 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3873 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3874 stcb->asoc.scope.loopback_scope = 1; 3875 stcb->asoc.scope.ipv4_local_scope = 1; 3876 stcb->asoc.scope.local_scope = 0; 3877 stcb->asoc.scope.site_scope = 1; 3878 addr_inscope = 1; 3879 } 3880 net->failure_threshold = stcb->asoc.def_net_failure; 3881 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3882 if (addr_inscope == 0) { 3883 net->dest_state = (SCTP_ADDR_REACHABLE | 3884 SCTP_ADDR_OUT_OF_SCOPE); 3885 } else { 3886 if (from == SCTP_ADDR_IS_CONFIRMED) 3887 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3888 net->dest_state = SCTP_ADDR_REACHABLE; 3889 else 3890 net->dest_state = SCTP_ADDR_REACHABLE | 3891 SCTP_ADDR_UNCONFIRMED; 3892 } 3893 /* 3894 * We set this to 0, the timer code knows that this means its an 3895 * initial value 3896 */ 3897 net->rto_needed = 1; 3898 net->RTO = 0; 3899 net->RTO_measured = 0; 3900 stcb->asoc.numnets++; 3901 net->ref_count = 1; 3902 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3903 net->port = port; 3904 net->dscp = stcb->asoc.default_dscp; 3905 #ifdef INET6 3906 net->flowlabel = stcb->asoc.default_flowlabel; 3907 #endif 3908 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3909 net->dest_state |= SCTP_ADDR_NOHB; 3910 } else { 3911 net->dest_state &= ~SCTP_ADDR_NOHB; 3912 } 3913 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3914 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3915 } else { 3916 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3917 } 3918 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3919 /* Init the timer structure */ 3920 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3921 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3922 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3923 3924 /* Now generate a route for this guy */ 3925 #ifdef INET6 3926 /* KAME hack: embed scopeid */ 3927 if (newaddr->sa_family == AF_INET6) { 3928 struct sockaddr_in6 *sin6; 3929 3930 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3931 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3932 sin6->sin6_scope_id = 0; 3933 } 3934 #endif 3935 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3936 stcb->asoc.vrf_id, 3937 stcb->sctp_ep->fibnum); 3938 3939 net->src_addr_selected = 0; 3940 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3941 /* Get source address */ 3942 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3943 stcb, 3944 (sctp_route_t *)&net->ro, 3945 net, 3946 0, 3947 stcb->asoc.vrf_id); 3948 if (stcb->asoc.default_mtu > 0) { 3949 net->mtu = stcb->asoc.default_mtu; 3950 switch (net->ro._l_addr.sa.sa_family) { 3951 #ifdef INET 3952 case AF_INET: 3953 net->mtu += SCTP_MIN_V4_OVERHEAD; 3954 break; 3955 #endif 3956 #ifdef INET6 3957 case AF_INET6: 3958 net->mtu += SCTP_MIN_OVERHEAD; 3959 break; 3960 #endif 3961 default: 3962 break; 3963 } 3964 #if defined(INET) || defined(INET6) 3965 if (net->port) { 3966 net->mtu += (uint32_t)sizeof(struct udphdr); 3967 } 3968 #endif 3969 } else if (net->ro._s_addr != NULL) { 3970 uint32_t imtu, rmtu, hcmtu; 3971 3972 net->src_addr_selected = 1; 3973 /* Now get the interface MTU */ 3974 if (net->ro._s_addr->ifn_p != NULL) { 3975 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3976 } else { 3977 imtu = 0; 3978 } 3979 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3980 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3981 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3982 if (rmtu == 0) { 3983 /* 3984 * Start things off to match mtu of 3985 * interface please. 3986 */ 3987 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3988 net->ro.ro_rt, net->mtu); 3989 } 3990 } 3991 } 3992 if (net->mtu == 0) { 3993 if (stcb->asoc.default_mtu > 0) { 3994 net->mtu = stcb->asoc.default_mtu; 3995 switch (net->ro._l_addr.sa.sa_family) { 3996 #ifdef INET 3997 case AF_INET: 3998 net->mtu += SCTP_MIN_V4_OVERHEAD; 3999 break; 4000 #endif 4001 #ifdef INET6 4002 case AF_INET6: 4003 net->mtu += SCTP_MIN_OVERHEAD; 4004 break; 4005 #endif 4006 default: 4007 break; 4008 } 4009 #if defined(INET) || defined(INET6) 4010 if (net->port) { 4011 net->mtu += (uint32_t)sizeof(struct udphdr); 4012 } 4013 #endif 4014 } else { 4015 switch (newaddr->sa_family) { 4016 #ifdef INET 4017 case AF_INET: 4018 net->mtu = SCTP_DEFAULT_MTU; 4019 break; 4020 #endif 4021 #ifdef INET6 4022 case AF_INET6: 4023 net->mtu = 1280; 4024 break; 4025 #endif 4026 default: 4027 break; 4028 } 4029 } 4030 } 4031 #if defined(INET) || defined(INET6) 4032 if (net->port) { 4033 net->mtu -= (uint32_t)sizeof(struct udphdr); 4034 } 4035 #endif 4036 if (from == SCTP_ALLOC_ASOC) { 4037 stcb->asoc.smallest_mtu = net->mtu; 4038 } 4039 if (stcb->asoc.smallest_mtu > net->mtu) { 4040 sctp_pathmtu_adjustment(stcb, net->mtu); 4041 } 4042 #ifdef INET6 4043 if (newaddr->sa_family == AF_INET6) { 4044 struct sockaddr_in6 *sin6; 4045 4046 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4047 (void)sa6_recoverscope(sin6); 4048 } 4049 #endif 4050 4051 /* JRS - Use the congestion control given in the CC module */ 4052 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4053 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4054 4055 /* 4056 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4057 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4058 */ 4059 net->find_pseudo_cumack = 1; 4060 net->find_rtx_pseudo_cumack = 1; 4061 /* Choose an initial flowid. */ 4062 net->flowid = stcb->asoc.my_vtag ^ 4063 ntohs(stcb->rport) ^ 4064 ntohs(stcb->sctp_ep->sctp_lport); 4065 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4066 if (netp) { 4067 *netp = net; 4068 } 4069 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4070 if (net->ro.ro_rt == NULL) { 4071 /* Since we have no route put it at the back */ 4072 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4073 } else if (netfirst == NULL) { 4074 /* We are the first one in the pool. */ 4075 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4076 } else if (netfirst->ro.ro_rt == NULL) { 4077 /* 4078 * First one has NO route. Place this one ahead of the first 4079 * one. 4080 */ 4081 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4082 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4083 /* 4084 * This one has a different interface than the one at the 4085 * top of the list. Place it ahead. 4086 */ 4087 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4088 } else { 4089 /* 4090 * Ok we have the same interface as the first one. Move 4091 * forward until we find either a) one with a NULL route... 4092 * insert ahead of that b) one with a different ifp.. insert 4093 * after that. c) end of the list.. insert at the tail. 4094 */ 4095 struct sctp_nets *netlook; 4096 4097 do { 4098 netlook = TAILQ_NEXT(netfirst, sctp_next); 4099 if (netlook == NULL) { 4100 /* End of the list */ 4101 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4102 break; 4103 } else if (netlook->ro.ro_rt == NULL) { 4104 /* next one has NO route */ 4105 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4106 break; 4107 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4108 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4109 net, sctp_next); 4110 break; 4111 } 4112 /* Shift forward */ 4113 netfirst = netlook; 4114 } while (netlook != NULL); 4115 } 4116 4117 /* got to have a primary set */ 4118 if (stcb->asoc.primary_destination == 0) { 4119 stcb->asoc.primary_destination = net; 4120 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4121 (net->ro.ro_rt) && 4122 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4123 /* No route to current primary adopt new primary */ 4124 stcb->asoc.primary_destination = net; 4125 } 4126 /* Validate primary is first */ 4127 net = TAILQ_FIRST(&stcb->asoc.nets); 4128 if ((net != stcb->asoc.primary_destination) && 4129 (stcb->asoc.primary_destination)) { 4130 /* 4131 * first one on the list is NOT the primary sctp_cmpaddr() 4132 * is much more efficient if the primary is the first on the 4133 * list, make it so. 4134 */ 4135 TAILQ_REMOVE(&stcb->asoc.nets, 4136 stcb->asoc.primary_destination, sctp_next); 4137 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4138 stcb->asoc.primary_destination, sctp_next); 4139 } 4140 return (0); 4141 } 4142 4143 4144 static uint32_t 4145 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4146 { 4147 uint32_t id; 4148 struct sctpasochead *head; 4149 struct sctp_tcb *lstcb; 4150 4151 SCTP_INP_WLOCK(inp); 4152 try_again: 4153 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4154 /* TSNH */ 4155 SCTP_INP_WUNLOCK(inp); 4156 return (0); 4157 } 4158 /* 4159 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4160 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4161 */ 4162 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4163 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4164 } 4165 id = inp->sctp_associd_counter; 4166 inp->sctp_associd_counter++; 4167 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4168 if (lstcb) { 4169 goto try_again; 4170 } 4171 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4172 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4173 stcb->asoc.in_asocid_hash = 1; 4174 SCTP_INP_WUNLOCK(inp); 4175 return id; 4176 } 4177 4178 /* 4179 * allocate an association and add it to the endpoint. The caller must be 4180 * careful to add all additional addresses once they are know right away or 4181 * else the assoc will be may experience a blackout scenario. 4182 */ 4183 struct sctp_tcb * 4184 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4185 int *error, uint32_t override_tag, uint32_t vrf_id, 4186 uint16_t o_streams, uint16_t port, 4187 struct thread *p 4188 ) 4189 { 4190 /* note the p argument is only valid in unbound sockets */ 4191 4192 struct sctp_tcb *stcb; 4193 struct sctp_association *asoc; 4194 struct sctpasochead *head; 4195 uint16_t rport; 4196 int err; 4197 4198 /* 4199 * Assumption made here: Caller has done a 4200 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4201 * address does not exist already. 4202 */ 4203 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4204 /* Hit max assoc, sorry no more */ 4205 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4206 *error = ENOBUFS; 4207 return (NULL); 4208 } 4209 if (firstaddr == NULL) { 4210 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4211 *error = EINVAL; 4212 return (NULL); 4213 } 4214 SCTP_INP_RLOCK(inp); 4215 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4216 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4217 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4218 /* 4219 * If its in the TCP pool, its NOT allowed to create an 4220 * association. The parent listener needs to call 4221 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4222 * off, or connected one does this.. its an error. 4223 */ 4224 SCTP_INP_RUNLOCK(inp); 4225 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4226 *error = EINVAL; 4227 return (NULL); 4228 } 4229 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4230 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4231 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4232 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4233 SCTP_INP_RUNLOCK(inp); 4234 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4235 *error = EINVAL; 4236 return (NULL); 4237 } 4238 } 4239 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4240 #ifdef SCTP_DEBUG 4241 if (firstaddr) { 4242 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4243 switch (firstaddr->sa_family) { 4244 #ifdef INET 4245 case AF_INET: 4246 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4247 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4248 break; 4249 #endif 4250 #ifdef INET6 4251 case AF_INET6: 4252 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4253 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4254 break; 4255 #endif 4256 default: 4257 break; 4258 } 4259 } else { 4260 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4261 } 4262 #endif /* SCTP_DEBUG */ 4263 switch (firstaddr->sa_family) { 4264 #ifdef INET 4265 case AF_INET: 4266 { 4267 struct sockaddr_in *sin; 4268 4269 sin = (struct sockaddr_in *)firstaddr; 4270 if ((ntohs(sin->sin_port) == 0) || 4271 (sin->sin_addr.s_addr == INADDR_ANY) || 4272 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4273 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4274 /* Invalid address */ 4275 SCTP_INP_RUNLOCK(inp); 4276 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4277 *error = EINVAL; 4278 return (NULL); 4279 } 4280 rport = sin->sin_port; 4281 break; 4282 } 4283 #endif 4284 #ifdef INET6 4285 case AF_INET6: 4286 { 4287 struct sockaddr_in6 *sin6; 4288 4289 sin6 = (struct sockaddr_in6 *)firstaddr; 4290 if ((ntohs(sin6->sin6_port) == 0) || 4291 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4292 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4293 /* Invalid address */ 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 rport = sin6->sin6_port; 4300 break; 4301 } 4302 #endif 4303 default: 4304 /* not supported family type */ 4305 SCTP_INP_RUNLOCK(inp); 4306 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4307 *error = EINVAL; 4308 return (NULL); 4309 } 4310 SCTP_INP_RUNLOCK(inp); 4311 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4312 /* 4313 * If you have not performed a bind, then we need to do the 4314 * ephemeral bind for you. 4315 */ 4316 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4317 (struct sockaddr *)NULL, 4318 (struct sctp_ifa *)NULL, 4319 p 4320 ))) { 4321 /* bind error, probably perm */ 4322 *error = err; 4323 return (NULL); 4324 } 4325 } 4326 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4327 if (stcb == NULL) { 4328 /* out of memory? */ 4329 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4330 *error = ENOMEM; 4331 return (NULL); 4332 } 4333 SCTP_INCR_ASOC_COUNT(); 4334 4335 memset(stcb, 0, sizeof(*stcb)); 4336 asoc = &stcb->asoc; 4337 4338 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4339 SCTP_TCB_LOCK_INIT(stcb); 4340 SCTP_TCB_SEND_LOCK_INIT(stcb); 4341 stcb->rport = rport; 4342 /* setup back pointer's */ 4343 stcb->sctp_ep = inp; 4344 stcb->sctp_socket = inp->sctp_socket; 4345 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4346 /* failed */ 4347 SCTP_TCB_LOCK_DESTROY(stcb); 4348 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4349 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4350 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4351 SCTP_DECR_ASOC_COUNT(); 4352 *error = err; 4353 return (NULL); 4354 } 4355 /* and the port */ 4356 SCTP_INP_INFO_WLOCK(); 4357 SCTP_INP_WLOCK(inp); 4358 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4359 /* inpcb freed while alloc going on */ 4360 SCTP_TCB_LOCK_DESTROY(stcb); 4361 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4362 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4363 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4364 SCTP_INP_WUNLOCK(inp); 4365 SCTP_INP_INFO_WUNLOCK(); 4366 SCTP_DECR_ASOC_COUNT(); 4367 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4368 *error = EINVAL; 4369 return (NULL); 4370 } 4371 SCTP_TCB_LOCK(stcb); 4372 4373 /* now that my_vtag is set, add it to the hash */ 4374 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4375 /* put it in the bucket in the vtag hash of assoc's for the system */ 4376 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4377 SCTP_INP_INFO_WUNLOCK(); 4378 4379 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4380 /* failure.. memory error? */ 4381 if (asoc->strmout) { 4382 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4383 asoc->strmout = NULL; 4384 } 4385 if (asoc->mapping_array) { 4386 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4387 asoc->mapping_array = NULL; 4388 } 4389 if (asoc->nr_mapping_array) { 4390 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4391 asoc->nr_mapping_array = NULL; 4392 } 4393 SCTP_DECR_ASOC_COUNT(); 4394 SCTP_TCB_UNLOCK(stcb); 4395 SCTP_TCB_LOCK_DESTROY(stcb); 4396 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4397 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4398 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4399 SCTP_INP_WUNLOCK(inp); 4400 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4401 *error = ENOBUFS; 4402 return (NULL); 4403 } 4404 /* Init all the timers */ 4405 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4406 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4407 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4408 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4409 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4410 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4411 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4412 4413 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4414 /* now file the port under the hash as well */ 4415 if (inp->sctp_tcbhash != NULL) { 4416 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4417 inp->sctp_hashmark)]; 4418 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4419 } 4420 SCTP_INP_WUNLOCK(inp); 4421 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4422 return (stcb); 4423 } 4424 4425 4426 void 4427 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4428 { 4429 struct sctp_association *asoc; 4430 4431 asoc = &stcb->asoc; 4432 asoc->numnets--; 4433 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4434 if (net == asoc->primary_destination) { 4435 /* Reset primary */ 4436 struct sctp_nets *lnet; 4437 4438 lnet = TAILQ_FIRST(&asoc->nets); 4439 /* 4440 * Mobility adaptation Ideally, if deleted destination is 4441 * the primary, it becomes a fast retransmission trigger by 4442 * the subsequent SET PRIMARY. (by micchie) 4443 */ 4444 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4445 SCTP_MOBILITY_BASE) || 4446 sctp_is_mobility_feature_on(stcb->sctp_ep, 4447 SCTP_MOBILITY_FASTHANDOFF)) { 4448 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4449 if (asoc->deleted_primary != NULL) { 4450 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4451 goto out; 4452 } 4453 asoc->deleted_primary = net; 4454 atomic_add_int(&net->ref_count, 1); 4455 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4456 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4457 sctp_mobility_feature_on(stcb->sctp_ep, 4458 SCTP_MOBILITY_PRIM_DELETED); 4459 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4460 stcb->sctp_ep, stcb, NULL); 4461 } 4462 out: 4463 /* Try to find a confirmed primary */ 4464 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4465 } 4466 if (net == asoc->last_data_chunk_from) { 4467 /* Reset primary */ 4468 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4469 } 4470 if (net == asoc->last_control_chunk_from) { 4471 /* Clear net */ 4472 asoc->last_control_chunk_from = NULL; 4473 } 4474 if (net == stcb->asoc.alternate) { 4475 sctp_free_remote_addr(stcb->asoc.alternate); 4476 stcb->asoc.alternate = NULL; 4477 } 4478 sctp_free_remote_addr(net); 4479 } 4480 4481 /* 4482 * remove a remote endpoint address from an association, it will fail if the 4483 * address does not exist. 4484 */ 4485 int 4486 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4487 { 4488 /* 4489 * Here we need to remove a remote address. This is quite simple, we 4490 * first find it in the list of address for the association 4491 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4492 * on that item. Note we do not allow it to be removed if there are 4493 * no other addresses. 4494 */ 4495 struct sctp_association *asoc; 4496 struct sctp_nets *net, *nnet; 4497 4498 asoc = &stcb->asoc; 4499 4500 /* locate the address */ 4501 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4502 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4503 continue; 4504 } 4505 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4506 remaddr)) { 4507 /* we found the guy */ 4508 if (asoc->numnets < 2) { 4509 /* Must have at LEAST two remote addresses */ 4510 return (-1); 4511 } else { 4512 sctp_remove_net(stcb, net); 4513 return (0); 4514 } 4515 } 4516 } 4517 /* not found. */ 4518 return (-2); 4519 } 4520 4521 void 4522 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4523 { 4524 struct sctpvtaghead *chain; 4525 struct sctp_tagblock *twait_block; 4526 int found = 0; 4527 int i; 4528 4529 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4530 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4531 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4532 if ((twait_block->vtag_block[i].v_tag == tag) && 4533 (twait_block->vtag_block[i].lport == lport) && 4534 (twait_block->vtag_block[i].rport == rport)) { 4535 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4536 twait_block->vtag_block[i].v_tag = 0; 4537 twait_block->vtag_block[i].lport = 0; 4538 twait_block->vtag_block[i].rport = 0; 4539 found = 1; 4540 break; 4541 } 4542 } 4543 if (found) 4544 break; 4545 } 4546 } 4547 4548 int 4549 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4550 { 4551 struct sctpvtaghead *chain; 4552 struct sctp_tagblock *twait_block; 4553 int found = 0; 4554 int i; 4555 4556 SCTP_INP_INFO_WLOCK(); 4557 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4558 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4559 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4560 if ((twait_block->vtag_block[i].v_tag == tag) && 4561 (twait_block->vtag_block[i].lport == lport) && 4562 (twait_block->vtag_block[i].rport == rport)) { 4563 found = 1; 4564 break; 4565 } 4566 } 4567 if (found) 4568 break; 4569 } 4570 SCTP_INP_INFO_WUNLOCK(); 4571 return (found); 4572 } 4573 4574 4575 void 4576 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4577 { 4578 struct sctpvtaghead *chain; 4579 struct sctp_tagblock *twait_block; 4580 struct timeval now; 4581 int set, i; 4582 4583 if (time == 0) { 4584 /* Its disabled */ 4585 return; 4586 } 4587 (void)SCTP_GETTIME_TIMEVAL(&now); 4588 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4589 set = 0; 4590 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4591 /* Block(s) present, lets find space, and expire on the fly */ 4592 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4593 if ((twait_block->vtag_block[i].v_tag == 0) && 4594 !set) { 4595 twait_block->vtag_block[i].tv_sec_at_expire = 4596 now.tv_sec + time; 4597 twait_block->vtag_block[i].v_tag = tag; 4598 twait_block->vtag_block[i].lport = lport; 4599 twait_block->vtag_block[i].rport = rport; 4600 set = 1; 4601 } else if ((twait_block->vtag_block[i].v_tag) && 4602 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4603 /* Audit expires this guy */ 4604 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4605 twait_block->vtag_block[i].v_tag = 0; 4606 twait_block->vtag_block[i].lport = 0; 4607 twait_block->vtag_block[i].rport = 0; 4608 if (set == 0) { 4609 /* Reuse it for my new tag */ 4610 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4611 twait_block->vtag_block[i].v_tag = tag; 4612 twait_block->vtag_block[i].lport = lport; 4613 twait_block->vtag_block[i].rport = rport; 4614 set = 1; 4615 } 4616 } 4617 } 4618 if (set) { 4619 /* 4620 * We only do up to the block where we can place our 4621 * tag for audits 4622 */ 4623 break; 4624 } 4625 } 4626 /* Need to add a new block to chain */ 4627 if (!set) { 4628 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4629 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4630 if (twait_block == NULL) { 4631 #ifdef INVARIANTS 4632 panic("Can not alloc tagblock"); 4633 #endif 4634 return; 4635 } 4636 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4637 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4638 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4639 twait_block->vtag_block[0].v_tag = tag; 4640 twait_block->vtag_block[0].lport = lport; 4641 twait_block->vtag_block[0].rport = rport; 4642 } 4643 } 4644 4645 void 4646 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4647 { 4648 struct sctp_tmit_chunk *chk, *nchk; 4649 struct sctp_queued_to_read *control, *ncontrol; 4650 4651 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4652 TAILQ_REMOVE(rh, control, next_instrm); 4653 control->on_strm_q = 0; 4654 if (control->on_read_q == 0) { 4655 sctp_free_remote_addr(control->whoFrom); 4656 if (control->data) { 4657 sctp_m_freem(control->data); 4658 control->data = NULL; 4659 } 4660 } 4661 /* Reassembly free? */ 4662 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4663 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4664 if (chk->data) { 4665 sctp_m_freem(chk->data); 4666 chk->data = NULL; 4667 } 4668 if (chk->holds_key_ref) 4669 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4670 sctp_free_remote_addr(chk->whoTo); 4671 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4672 SCTP_DECR_CHK_COUNT(); 4673 /* sa_ignore FREED_MEMORY */ 4674 } 4675 /* 4676 * We don't free the address here since all the net's were 4677 * freed above. 4678 */ 4679 if (control->on_read_q == 0) { 4680 sctp_free_a_readq(stcb, control); 4681 } 4682 } 4683 } 4684 4685 4686 /*- 4687 * Free the association after un-hashing the remote port. This 4688 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4689 * expect that the input to this function IS a locked TCB. 4690 * It will return 0, if it did NOT destroy the association (instead 4691 * it unlocks it. It will return NON-zero if it either destroyed the 4692 * association OR the association is already destroyed. 4693 */ 4694 int 4695 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4696 { 4697 int i; 4698 struct sctp_association *asoc; 4699 struct sctp_nets *net, *nnet; 4700 struct sctp_laddr *laddr, *naddr; 4701 struct sctp_tmit_chunk *chk, *nchk; 4702 struct sctp_asconf_addr *aparam, *naparam; 4703 struct sctp_asconf_ack *aack, *naack; 4704 struct sctp_stream_reset_list *strrst, *nstrrst; 4705 struct sctp_queued_to_read *sq, *nsq; 4706 struct sctp_stream_queue_pending *sp, *nsp; 4707 sctp_sharedkey_t *shared_key, *nshared_key; 4708 struct socket *so; 4709 4710 /* first, lets purge the entry from the hash table. */ 4711 4712 #ifdef SCTP_LOG_CLOSING 4713 sctp_log_closing(inp, stcb, 6); 4714 #endif 4715 if (stcb->asoc.state == 0) { 4716 #ifdef SCTP_LOG_CLOSING 4717 sctp_log_closing(inp, NULL, 7); 4718 #endif 4719 /* there is no asoc, really TSNH :-0 */ 4720 return (1); 4721 } 4722 if (stcb->asoc.alternate) { 4723 sctp_free_remote_addr(stcb->asoc.alternate); 4724 stcb->asoc.alternate = NULL; 4725 } 4726 /* TEMP CODE */ 4727 if (stcb->freed_from_where == 0) { 4728 /* Only record the first place free happened from */ 4729 stcb->freed_from_where = from_location; 4730 } 4731 /* TEMP CODE */ 4732 4733 asoc = &stcb->asoc; 4734 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4735 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4736 /* nothing around */ 4737 so = NULL; 4738 else 4739 so = inp->sctp_socket; 4740 4741 /* 4742 * We used timer based freeing if a reader or writer is in the way. 4743 * So we first check if we are actually being called from a timer, 4744 * if so we abort early if a reader or writer is still in the way. 4745 */ 4746 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4747 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4748 /* 4749 * is it the timer driving us? if so are the reader/writers 4750 * gone? 4751 */ 4752 if (stcb->asoc.refcnt) { 4753 /* nope, reader or writer in the way */ 4754 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4755 /* no asoc destroyed */ 4756 SCTP_TCB_UNLOCK(stcb); 4757 #ifdef SCTP_LOG_CLOSING 4758 sctp_log_closing(inp, stcb, 8); 4759 #endif 4760 return (0); 4761 } 4762 } 4763 /* now clean up any other timers */ 4764 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4765 asoc->dack_timer.self = NULL; 4766 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4767 /*- 4768 * For stream reset we don't blast this unless 4769 * it is a str-reset timer, it might be the 4770 * free-asoc timer which we DON'T want to 4771 * disturb. 4772 */ 4773 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4774 asoc->strreset_timer.self = NULL; 4775 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4776 asoc->asconf_timer.self = NULL; 4777 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4778 asoc->autoclose_timer.self = NULL; 4779 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4780 asoc->shut_guard_timer.self = NULL; 4781 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4782 asoc->delayed_event_timer.self = NULL; 4783 /* Mobility adaptation */ 4784 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4785 asoc->delete_prim_timer.self = NULL; 4786 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4787 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4788 net->rxt_timer.self = NULL; 4789 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4790 net->pmtu_timer.self = NULL; 4791 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4792 net->hb_timer.self = NULL; 4793 } 4794 /* Now the read queue needs to be cleaned up (only once) */ 4795 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4796 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4797 SCTP_INP_READ_LOCK(inp); 4798 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4799 if (sq->stcb == stcb) { 4800 sq->do_not_ref_stcb = 1; 4801 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4802 /* 4803 * If there is no end, there never will be 4804 * now. 4805 */ 4806 if (sq->end_added == 0) { 4807 /* Held for PD-API clear that. */ 4808 sq->pdapi_aborted = 1; 4809 sq->held_length = 0; 4810 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4811 /* 4812 * Need to add a PD-API 4813 * aborted indication. 4814 * Setting the control_pdapi 4815 * assures that it will be 4816 * added right after this 4817 * msg. 4818 */ 4819 uint32_t strseq; 4820 4821 stcb->asoc.control_pdapi = sq; 4822 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4823 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4824 stcb, 4825 SCTP_PARTIAL_DELIVERY_ABORTED, 4826 (void *)&strseq, 4827 SCTP_SO_LOCKED); 4828 stcb->asoc.control_pdapi = NULL; 4829 } 4830 } 4831 /* Add an end to wake them */ 4832 sq->end_added = 1; 4833 } 4834 } 4835 SCTP_INP_READ_UNLOCK(inp); 4836 if (stcb->block_entry) { 4837 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4838 stcb->block_entry->error = ECONNRESET; 4839 stcb->block_entry = NULL; 4840 } 4841 } 4842 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4843 /* 4844 * Someone holds a reference OR the socket is unaccepted 4845 * yet. 4846 */ 4847 if ((stcb->asoc.refcnt) || 4848 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4849 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4850 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4851 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4852 } 4853 SCTP_TCB_UNLOCK(stcb); 4854 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4855 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4856 /* nothing around */ 4857 so = NULL; 4858 if (so) { 4859 /* Wake any reader/writers */ 4860 sctp_sorwakeup(inp, so); 4861 sctp_sowwakeup(inp, so); 4862 } 4863 #ifdef SCTP_LOG_CLOSING 4864 sctp_log_closing(inp, stcb, 9); 4865 #endif 4866 /* no asoc destroyed */ 4867 return (0); 4868 } 4869 #ifdef SCTP_LOG_CLOSING 4870 sctp_log_closing(inp, stcb, 10); 4871 #endif 4872 /* 4873 * When I reach here, no others want to kill the assoc yet.. and I 4874 * own the lock. Now its possible an abort comes in when I do the 4875 * lock exchange below to grab all the locks to do the final take 4876 * out. to prevent this we increment the count, which will start a 4877 * timer and blow out above thus assuring us that we hold exclusive 4878 * killing of the asoc. Note that after getting back the TCB lock we 4879 * will go ahead and increment the counter back up and stop any 4880 * timer a passing stranger may have started :-S 4881 */ 4882 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4883 atomic_add_int(&stcb->asoc.refcnt, 1); 4884 4885 SCTP_TCB_UNLOCK(stcb); 4886 SCTP_INP_INFO_WLOCK(); 4887 SCTP_INP_WLOCK(inp); 4888 SCTP_TCB_LOCK(stcb); 4889 } 4890 /* Double check the GONE flag */ 4891 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4892 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4893 /* nothing around */ 4894 so = NULL; 4895 4896 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4897 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4898 /* 4899 * For TCP type we need special handling when we are 4900 * connected. We also include the peel'ed off ones to. 4901 */ 4902 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4903 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4904 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4905 if (so) { 4906 SOCKBUF_LOCK(&so->so_rcv); 4907 if (so->so_rcv.sb_cc == 0) { 4908 so->so_state &= ~(SS_ISCONNECTING | 4909 SS_ISDISCONNECTING | 4910 SS_ISCONFIRMING | 4911 SS_ISCONNECTED); 4912 } 4913 socantrcvmore_locked(so); 4914 socantsendmore(so); 4915 sctp_sowwakeup(inp, so); 4916 sctp_sorwakeup(inp, so); 4917 SCTP_SOWAKEUP(so); 4918 } 4919 } 4920 } 4921 /* 4922 * Make it invalid too, that way if its about to run it will abort 4923 * and return. 4924 */ 4925 /* re-increment the lock */ 4926 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4927 atomic_add_int(&stcb->asoc.refcnt, -1); 4928 } 4929 if (stcb->asoc.refcnt) { 4930 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4931 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4932 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4933 SCTP_INP_INFO_WUNLOCK(); 4934 SCTP_INP_WUNLOCK(inp); 4935 } 4936 SCTP_TCB_UNLOCK(stcb); 4937 return (0); 4938 } 4939 asoc->state = 0; 4940 if (inp->sctp_tcbhash) { 4941 LIST_REMOVE(stcb, sctp_tcbhash); 4942 } 4943 if (stcb->asoc.in_asocid_hash) { 4944 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4945 } 4946 /* Now lets remove it from the list of ALL associations in the EP */ 4947 LIST_REMOVE(stcb, sctp_tcblist); 4948 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4949 SCTP_INP_INCR_REF(inp); 4950 SCTP_INP_WUNLOCK(inp); 4951 } 4952 /* pull from vtag hash */ 4953 LIST_REMOVE(stcb, sctp_asocs); 4954 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4955 inp->sctp_lport, stcb->rport); 4956 4957 /* 4958 * Now restop the timers to be sure this is paranoia at is finest! 4959 */ 4960 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4961 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4962 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4963 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4964 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4965 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4966 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4967 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4968 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4969 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4970 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4971 } 4972 4973 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4974 /* 4975 * The chunk lists and such SHOULD be empty but we check them just 4976 * in case. 4977 */ 4978 /* anything on the wheel needs to be removed */ 4979 for (i = 0; i < asoc->streamoutcnt; i++) { 4980 struct sctp_stream_out *outs; 4981 4982 outs = &asoc->strmout[i]; 4983 /* now clean up any chunks here */ 4984 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4985 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4986 TAILQ_REMOVE(&outs->outqueue, sp, next); 4987 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0); 4988 sctp_free_spbufspace(stcb, asoc, sp); 4989 if (sp->data) { 4990 if (so) { 4991 /* Still an open socket - report */ 4992 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4993 0, (void *)sp, SCTP_SO_LOCKED); 4994 } 4995 if (sp->data) { 4996 sctp_m_freem(sp->data); 4997 sp->data = NULL; 4998 sp->tail_mbuf = NULL; 4999 sp->length = 0; 5000 } 5001 } 5002 if (sp->net) { 5003 sctp_free_remote_addr(sp->net); 5004 sp->net = NULL; 5005 } 5006 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 5007 } 5008 } 5009 /* sa_ignore FREED_MEMORY */ 5010 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 5011 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 5012 SCTP_FREE(strrst, SCTP_M_STRESET); 5013 } 5014 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 5015 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 5016 if (sq->data) { 5017 sctp_m_freem(sq->data); 5018 sq->data = NULL; 5019 } 5020 sctp_free_remote_addr(sq->whoFrom); 5021 sq->whoFrom = NULL; 5022 sq->stcb = NULL; 5023 /* Free the ctl entry */ 5024 sctp_free_a_readq(stcb, sq); 5025 /* sa_ignore FREED_MEMORY */ 5026 } 5027 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 5028 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5029 if (chk->data) { 5030 sctp_m_freem(chk->data); 5031 chk->data = NULL; 5032 } 5033 if (chk->holds_key_ref) 5034 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5035 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5036 SCTP_DECR_CHK_COUNT(); 5037 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5038 asoc->free_chunk_cnt--; 5039 /* sa_ignore FREED_MEMORY */ 5040 } 5041 /* pending send queue SHOULD be empty */ 5042 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5043 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5044 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5045 #ifdef INVARIANTS 5046 } else { 5047 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5048 #endif 5049 } 5050 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5051 if (chk->data) { 5052 if (so) { 5053 /* Still a socket? */ 5054 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5055 0, chk, SCTP_SO_LOCKED); 5056 } 5057 if (chk->data) { 5058 sctp_m_freem(chk->data); 5059 chk->data = NULL; 5060 } 5061 } 5062 if (chk->holds_key_ref) 5063 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5064 if (chk->whoTo) { 5065 sctp_free_remote_addr(chk->whoTo); 5066 chk->whoTo = NULL; 5067 } 5068 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5069 SCTP_DECR_CHK_COUNT(); 5070 /* sa_ignore FREED_MEMORY */ 5071 } 5072 /* sent queue SHOULD be empty */ 5073 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5074 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5075 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5076 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5077 #ifdef INVARIANTS 5078 } else { 5079 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5080 #endif 5081 } 5082 } 5083 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5084 if (chk->data) { 5085 if (so) { 5086 /* Still a socket? */ 5087 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5088 0, chk, SCTP_SO_LOCKED); 5089 } 5090 if (chk->data) { 5091 sctp_m_freem(chk->data); 5092 chk->data = NULL; 5093 } 5094 } 5095 if (chk->holds_key_ref) 5096 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5097 sctp_free_remote_addr(chk->whoTo); 5098 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5099 SCTP_DECR_CHK_COUNT(); 5100 /* sa_ignore FREED_MEMORY */ 5101 } 5102 #ifdef INVARIANTS 5103 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5104 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5105 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5106 } 5107 } 5108 #endif 5109 /* control queue MAY not be empty */ 5110 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5111 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5112 if (chk->data) { 5113 sctp_m_freem(chk->data); 5114 chk->data = NULL; 5115 } 5116 if (chk->holds_key_ref) 5117 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5118 sctp_free_remote_addr(chk->whoTo); 5119 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5120 SCTP_DECR_CHK_COUNT(); 5121 /* sa_ignore FREED_MEMORY */ 5122 } 5123 /* ASCONF queue MAY not be empty */ 5124 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5125 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5126 if (chk->data) { 5127 sctp_m_freem(chk->data); 5128 chk->data = NULL; 5129 } 5130 if (chk->holds_key_ref) 5131 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5132 sctp_free_remote_addr(chk->whoTo); 5133 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5134 SCTP_DECR_CHK_COUNT(); 5135 /* sa_ignore FREED_MEMORY */ 5136 } 5137 if (asoc->mapping_array) { 5138 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5139 asoc->mapping_array = NULL; 5140 } 5141 if (asoc->nr_mapping_array) { 5142 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5143 asoc->nr_mapping_array = NULL; 5144 } 5145 /* the stream outs */ 5146 if (asoc->strmout) { 5147 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5148 asoc->strmout = NULL; 5149 } 5150 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5151 if (asoc->strmin) { 5152 for (i = 0; i < asoc->streamincnt; i++) { 5153 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5154 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5155 } 5156 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5157 asoc->strmin = NULL; 5158 } 5159 asoc->streamincnt = 0; 5160 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5161 #ifdef INVARIANTS 5162 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5163 panic("no net's left alloc'ed, or list points to itself"); 5164 } 5165 #endif 5166 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5167 sctp_free_remote_addr(net); 5168 } 5169 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5170 /* sa_ignore FREED_MEMORY */ 5171 sctp_remove_laddr(laddr); 5172 } 5173 5174 /* pending asconf (address) parameters */ 5175 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5176 /* sa_ignore FREED_MEMORY */ 5177 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5178 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5179 } 5180 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5181 /* sa_ignore FREED_MEMORY */ 5182 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5183 if (aack->data != NULL) { 5184 sctp_m_freem(aack->data); 5185 } 5186 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5187 } 5188 /* clean up auth stuff */ 5189 if (asoc->local_hmacs) 5190 sctp_free_hmaclist(asoc->local_hmacs); 5191 if (asoc->peer_hmacs) 5192 sctp_free_hmaclist(asoc->peer_hmacs); 5193 5194 if (asoc->local_auth_chunks) 5195 sctp_free_chunklist(asoc->local_auth_chunks); 5196 if (asoc->peer_auth_chunks) 5197 sctp_free_chunklist(asoc->peer_auth_chunks); 5198 5199 sctp_free_authinfo(&asoc->authinfo); 5200 5201 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5202 LIST_REMOVE(shared_key, next); 5203 sctp_free_sharedkey(shared_key); 5204 /* sa_ignore FREED_MEMORY */ 5205 } 5206 5207 /* Insert new items here :> */ 5208 5209 /* Get rid of LOCK */ 5210 SCTP_TCB_UNLOCK(stcb); 5211 SCTP_TCB_LOCK_DESTROY(stcb); 5212 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5213 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5214 SCTP_INP_INFO_WUNLOCK(); 5215 SCTP_INP_RLOCK(inp); 5216 } 5217 #ifdef SCTP_TRACK_FREED_ASOCS 5218 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5219 /* now clean up the tasoc itself */ 5220 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5221 SCTP_DECR_ASOC_COUNT(); 5222 } else { 5223 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5224 } 5225 #else 5226 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5227 SCTP_DECR_ASOC_COUNT(); 5228 #endif 5229 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5230 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5231 /* 5232 * If its NOT the inp_free calling us AND sctp_close 5233 * as been called, we call back... 5234 */ 5235 SCTP_INP_RUNLOCK(inp); 5236 /* 5237 * This will start the kill timer (if we are the 5238 * last one) since we hold an increment yet. But 5239 * this is the only safe way to do this since 5240 * otherwise if the socket closes at the same time 5241 * we are here we might collide in the cleanup. 5242 */ 5243 sctp_inpcb_free(inp, 5244 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5245 SCTP_CALLED_DIRECTLY_NOCMPSET); 5246 SCTP_INP_DECR_REF(inp); 5247 goto out_of; 5248 } else { 5249 /* The socket is still open. */ 5250 SCTP_INP_DECR_REF(inp); 5251 } 5252 } 5253 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5254 SCTP_INP_RUNLOCK(inp); 5255 } 5256 out_of: 5257 /* destroyed the asoc */ 5258 #ifdef SCTP_LOG_CLOSING 5259 sctp_log_closing(inp, NULL, 11); 5260 #endif 5261 return (1); 5262 } 5263 5264 5265 5266 /* 5267 * determine if a destination is "reachable" based upon the addresses bound 5268 * to the current endpoint (e.g. only v4 or v6 currently bound) 5269 */ 5270 /* 5271 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5272 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5273 * types bound as its endpoint 5274 */ 5275 int 5276 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5277 { 5278 struct sctp_inpcb *inp; 5279 int answer; 5280 5281 /* 5282 * No locks here, the TCB, in all cases is already locked and an 5283 * assoc is up. There is either a INP lock by the caller applied (in 5284 * asconf case when deleting an address) or NOT in the HB case, 5285 * however if HB then the INP increment is up and the INP will not 5286 * be removed (on top of the fact that we have a TCB lock). So we 5287 * only want to read the sctp_flags, which is either bound-all or 5288 * not.. no protection needed since once an assoc is up you can't be 5289 * changing your binding. 5290 */ 5291 inp = stcb->sctp_ep; 5292 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5293 /* if bound all, destination is not restricted */ 5294 /* 5295 * RRS: Question during lock work: Is this correct? If you 5296 * are bound-all you still might need to obey the V4--V6 5297 * flags??? IMO this bound-all stuff needs to be removed! 5298 */ 5299 return (1); 5300 } 5301 /* NOTE: all "scope" checks are done when local addresses are added */ 5302 switch (destaddr->sa_family) { 5303 #ifdef INET6 5304 case AF_INET6: 5305 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5306 break; 5307 #endif 5308 #ifdef INET 5309 case AF_INET: 5310 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5311 break; 5312 #endif 5313 default: 5314 /* invalid family, so it's unreachable */ 5315 answer = 0; 5316 break; 5317 } 5318 return (answer); 5319 } 5320 5321 /* 5322 * update the inp_vflags on an endpoint 5323 */ 5324 static void 5325 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5326 { 5327 struct sctp_laddr *laddr; 5328 5329 /* first clear the flag */ 5330 inp->ip_inp.inp.inp_vflag = 0; 5331 /* set the flag based on addresses on the ep list */ 5332 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5333 if (laddr->ifa == NULL) { 5334 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5335 __func__); 5336 continue; 5337 } 5338 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5339 continue; 5340 } 5341 switch (laddr->ifa->address.sa.sa_family) { 5342 #ifdef INET6 5343 case AF_INET6: 5344 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5345 break; 5346 #endif 5347 #ifdef INET 5348 case AF_INET: 5349 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5350 break; 5351 #endif 5352 default: 5353 break; 5354 } 5355 } 5356 } 5357 5358 /* 5359 * Add the address to the endpoint local address list There is nothing to be 5360 * done if we are bound to all addresses 5361 */ 5362 void 5363 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5364 { 5365 struct sctp_laddr *laddr; 5366 struct sctp_tcb *stcb; 5367 int fnd, error = 0; 5368 5369 fnd = 0; 5370 5371 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5372 /* You are already bound to all. You have it already */ 5373 return; 5374 } 5375 #ifdef INET6 5376 if (ifa->address.sa.sa_family == AF_INET6) { 5377 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5378 /* Can't bind a non-useable addr. */ 5379 return; 5380 } 5381 } 5382 #endif 5383 /* first, is it already present? */ 5384 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5385 if (laddr->ifa == ifa) { 5386 fnd = 1; 5387 break; 5388 } 5389 } 5390 5391 if (fnd == 0) { 5392 /* Not in the ep list */ 5393 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5394 if (error != 0) 5395 return; 5396 inp->laddr_count++; 5397 /* update inp_vflag flags */ 5398 switch (ifa->address.sa.sa_family) { 5399 #ifdef INET6 5400 case AF_INET6: 5401 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5402 break; 5403 #endif 5404 #ifdef INET 5405 case AF_INET: 5406 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5407 break; 5408 #endif 5409 default: 5410 break; 5411 } 5412 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5413 sctp_add_local_addr_restricted(stcb, ifa); 5414 } 5415 } 5416 return; 5417 } 5418 5419 5420 /* 5421 * select a new (hopefully reachable) destination net (should only be used 5422 * when we deleted an ep addr that is the only usable source address to reach 5423 * the destination net) 5424 */ 5425 static void 5426 sctp_select_primary_destination(struct sctp_tcb *stcb) 5427 { 5428 struct sctp_nets *net; 5429 5430 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5431 /* for now, we'll just pick the first reachable one we find */ 5432 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5433 continue; 5434 if (sctp_destination_is_reachable(stcb, 5435 (struct sockaddr *)&net->ro._l_addr)) { 5436 /* found a reachable destination */ 5437 stcb->asoc.primary_destination = net; 5438 } 5439 } 5440 /* I can't there from here! ...we're gonna die shortly... */ 5441 } 5442 5443 5444 /* 5445 * Delete the address from the endpoint local address list. There is nothing 5446 * to be done if we are bound to all addresses 5447 */ 5448 void 5449 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5450 { 5451 struct sctp_laddr *laddr; 5452 int fnd; 5453 5454 fnd = 0; 5455 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5456 /* You are already bound to all. You have it already */ 5457 return; 5458 } 5459 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5460 if (laddr->ifa == ifa) { 5461 fnd = 1; 5462 break; 5463 } 5464 } 5465 if (fnd && (inp->laddr_count < 2)) { 5466 /* can't delete unless there are at LEAST 2 addresses */ 5467 return; 5468 } 5469 if (fnd) { 5470 /* 5471 * clean up any use of this address go through our 5472 * associations and clear any last_used_address that match 5473 * this one for each assoc, see if a new primary_destination 5474 * is needed 5475 */ 5476 struct sctp_tcb *stcb; 5477 5478 /* clean up "next_addr_touse" */ 5479 if (inp->next_addr_touse == laddr) 5480 /* delete this address */ 5481 inp->next_addr_touse = NULL; 5482 5483 /* clean up "last_used_address" */ 5484 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5485 struct sctp_nets *net; 5486 5487 SCTP_TCB_LOCK(stcb); 5488 if (stcb->asoc.last_used_address == laddr) 5489 /* delete this address */ 5490 stcb->asoc.last_used_address = NULL; 5491 /* 5492 * Now spin through all the nets and purge any ref 5493 * to laddr 5494 */ 5495 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5496 if (net->ro._s_addr == laddr->ifa) { 5497 /* Yep, purge src address selected */ 5498 sctp_rtentry_t *rt; 5499 5500 /* delete this address if cached */ 5501 rt = net->ro.ro_rt; 5502 if (rt != NULL) { 5503 RTFREE(rt); 5504 net->ro.ro_rt = NULL; 5505 } 5506 sctp_free_ifa(net->ro._s_addr); 5507 net->ro._s_addr = NULL; 5508 net->src_addr_selected = 0; 5509 } 5510 } 5511 SCTP_TCB_UNLOCK(stcb); 5512 } /* for each tcb */ 5513 /* remove it from the ep list */ 5514 sctp_remove_laddr(laddr); 5515 inp->laddr_count--; 5516 /* update inp_vflag flags */ 5517 sctp_update_ep_vflag(inp); 5518 } 5519 return; 5520 } 5521 5522 /* 5523 * Add the address to the TCB local address restricted list. 5524 * This is a "pending" address list (eg. addresses waiting for an 5525 * ASCONF-ACK response) and cannot be used as a valid source address. 5526 */ 5527 void 5528 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5529 { 5530 struct sctp_laddr *laddr; 5531 struct sctpladdr *list; 5532 5533 /* 5534 * Assumes TCB is locked.. and possibly the INP. May need to 5535 * confirm/fix that if we need it and is not the case. 5536 */ 5537 list = &stcb->asoc.sctp_restricted_addrs; 5538 5539 #ifdef INET6 5540 if (ifa->address.sa.sa_family == AF_INET6) { 5541 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5542 /* Can't bind a non-existent addr. */ 5543 return; 5544 } 5545 } 5546 #endif 5547 /* does the address already exist? */ 5548 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5549 if (laddr->ifa == ifa) { 5550 return; 5551 } 5552 } 5553 5554 /* add to the list */ 5555 (void)sctp_insert_laddr(list, ifa, 0); 5556 return; 5557 } 5558 5559 /* 5560 * Remove a local address from the TCB local address restricted list 5561 */ 5562 void 5563 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5564 { 5565 struct sctp_inpcb *inp; 5566 struct sctp_laddr *laddr; 5567 5568 /* 5569 * This is called by asconf work. It is assumed that a) The TCB is 5570 * locked and b) The INP is locked. This is true in as much as I can 5571 * trace through the entry asconf code where I did these locks. 5572 * Again, the ASCONF code is a bit different in that it does lock 5573 * the INP during its work often times. This must be since we don't 5574 * want other proc's looking up things while what they are looking 5575 * up is changing :-D 5576 */ 5577 5578 inp = stcb->sctp_ep; 5579 /* if subset bound and don't allow ASCONF's, can't delete last */ 5580 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5581 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5582 if (stcb->sctp_ep->laddr_count < 2) { 5583 /* can't delete last address */ 5584 return; 5585 } 5586 } 5587 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5588 /* remove the address if it exists */ 5589 if (laddr->ifa == NULL) 5590 continue; 5591 if (laddr->ifa == ifa) { 5592 sctp_remove_laddr(laddr); 5593 return; 5594 } 5595 } 5596 5597 /* address not found! */ 5598 return; 5599 } 5600 5601 /* 5602 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5603 */ 5604 /* sysctl */ 5605 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5606 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5607 5608 5609 5610 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5611 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5612 int *sctp_cpuarry = NULL; 5613 void 5614 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5615 { 5616 /* Queue a packet to a processor for the specified core */ 5617 struct sctp_mcore_queue *qent; 5618 struct sctp_mcore_ctrl *wkq; 5619 int need_wake = 0; 5620 5621 if (sctp_mcore_workers == NULL) { 5622 /* Something went way bad during setup */ 5623 sctp_input_with_port(m, off, 0); 5624 return; 5625 } 5626 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5627 (sizeof(struct sctp_mcore_queue)), 5628 SCTP_M_MCORE); 5629 if (qent == NULL) { 5630 /* This is trouble */ 5631 sctp_input_with_port(m, off, 0); 5632 return; 5633 } 5634 qent->vn = curvnet; 5635 qent->m = m; 5636 qent->off = off; 5637 qent->v6 = 0; 5638 wkq = &sctp_mcore_workers[cpu_to_use]; 5639 SCTP_MCORE_QLOCK(wkq); 5640 5641 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5642 if (wkq->running == 0) { 5643 need_wake = 1; 5644 } 5645 SCTP_MCORE_QUNLOCK(wkq); 5646 if (need_wake) { 5647 wakeup(&wkq->running); 5648 } 5649 } 5650 5651 static void 5652 sctp_mcore_thread(void *arg) 5653 { 5654 5655 struct sctp_mcore_ctrl *wkq; 5656 struct sctp_mcore_queue *qent; 5657 5658 wkq = (struct sctp_mcore_ctrl *)arg; 5659 struct mbuf *m; 5660 int off, v6; 5661 5662 /* Wait for first tickle */ 5663 SCTP_MCORE_LOCK(wkq); 5664 wkq->running = 0; 5665 msleep(&wkq->running, 5666 &wkq->core_mtx, 5667 0, "wait for pkt", 0); 5668 SCTP_MCORE_UNLOCK(wkq); 5669 5670 /* Bind to our cpu */ 5671 thread_lock(curthread); 5672 sched_bind(curthread, wkq->cpuid); 5673 thread_unlock(curthread); 5674 5675 /* Now lets start working */ 5676 SCTP_MCORE_LOCK(wkq); 5677 /* Now grab lock and go */ 5678 for (;;) { 5679 SCTP_MCORE_QLOCK(wkq); 5680 skip_sleep: 5681 wkq->running = 1; 5682 qent = TAILQ_FIRST(&wkq->que); 5683 if (qent) { 5684 TAILQ_REMOVE(&wkq->que, qent, next); 5685 SCTP_MCORE_QUNLOCK(wkq); 5686 CURVNET_SET(qent->vn); 5687 m = qent->m; 5688 off = qent->off; 5689 v6 = qent->v6; 5690 SCTP_FREE(qent, SCTP_M_MCORE); 5691 if (v6 == 0) { 5692 sctp_input_with_port(m, off, 0); 5693 } else { 5694 SCTP_PRINTF("V6 not yet supported\n"); 5695 sctp_m_freem(m); 5696 } 5697 CURVNET_RESTORE(); 5698 SCTP_MCORE_QLOCK(wkq); 5699 } 5700 wkq->running = 0; 5701 if (!TAILQ_EMPTY(&wkq->que)) { 5702 goto skip_sleep; 5703 } 5704 SCTP_MCORE_QUNLOCK(wkq); 5705 msleep(&wkq->running, 5706 &wkq->core_mtx, 5707 0, "wait for pkt", 0); 5708 } 5709 } 5710 5711 static void 5712 sctp_startup_mcore_threads(void) 5713 { 5714 int i, cpu; 5715 5716 if (mp_ncpus == 1) 5717 return; 5718 5719 if (sctp_mcore_workers != NULL) { 5720 /* 5721 * Already been here in some previous vnet? 5722 */ 5723 return; 5724 } 5725 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5726 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5727 SCTP_M_MCORE); 5728 if (sctp_mcore_workers == NULL) { 5729 /* TSNH I hope */ 5730 return; 5731 } 5732 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5733 sizeof(struct sctp_mcore_ctrl))); 5734 /* Init the structures */ 5735 for (i = 0; i <= mp_maxid; i++) { 5736 TAILQ_INIT(&sctp_mcore_workers[i].que); 5737 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5738 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5739 sctp_mcore_workers[i].cpuid = i; 5740 } 5741 if (sctp_cpuarry == NULL) { 5742 SCTP_MALLOC(sctp_cpuarry, int *, 5743 (mp_ncpus * sizeof(int)), 5744 SCTP_M_MCORE); 5745 i = 0; 5746 CPU_FOREACH(cpu) { 5747 sctp_cpuarry[i] = cpu; 5748 i++; 5749 } 5750 } 5751 /* Now start them all */ 5752 CPU_FOREACH(cpu) { 5753 (void)kproc_create(sctp_mcore_thread, 5754 (void *)&sctp_mcore_workers[cpu], 5755 &sctp_mcore_workers[cpu].thread_proc, 5756 RFPROC, 5757 SCTP_KTHREAD_PAGES, 5758 SCTP_MCORE_NAME); 5759 5760 } 5761 } 5762 #endif 5763 5764 void 5765 sctp_pcb_init() 5766 { 5767 /* 5768 * SCTP initialization for the PCB structures should be called by 5769 * the sctp_init() function. 5770 */ 5771 int i; 5772 struct timeval tv; 5773 5774 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5775 /* error I was called twice */ 5776 return; 5777 } 5778 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5779 5780 #if defined(SCTP_LOCAL_TRACE_BUF) 5781 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5782 #endif 5783 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5784 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5785 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5786 SCTP_M_MCORE); 5787 #endif 5788 (void)SCTP_GETTIME_TIMEVAL(&tv); 5789 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5790 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5791 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5792 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5793 #else 5794 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5795 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5796 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5797 #endif 5798 /* init the empty list of (All) Endpoints */ 5799 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5800 5801 5802 /* init the hash table of endpoints */ 5803 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5804 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5805 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5806 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5807 &SCTP_BASE_INFO(hashasocmark)); 5808 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5809 &SCTP_BASE_INFO(hashmark)); 5810 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5811 &SCTP_BASE_INFO(hashtcpmark)); 5812 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5813 5814 5815 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5816 &SCTP_BASE_INFO(hashvrfmark)); 5817 5818 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5819 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5820 /* init the zones */ 5821 /* 5822 * FIX ME: Should check for NULL returns, but if it does fail we are 5823 * doomed to panic anyways... add later maybe. 5824 */ 5825 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5826 sizeof(struct sctp_inpcb), maxsockets); 5827 5828 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5829 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5830 5831 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5832 sizeof(struct sctp_laddr), 5833 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5834 5835 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5836 sizeof(struct sctp_nets), 5837 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5838 5839 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5840 sizeof(struct sctp_tmit_chunk), 5841 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5842 5843 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5844 sizeof(struct sctp_queued_to_read), 5845 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5846 5847 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5848 sizeof(struct sctp_stream_queue_pending), 5849 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5850 5851 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5852 sizeof(struct sctp_asconf), 5853 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5854 5855 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5856 sizeof(struct sctp_asconf_ack), 5857 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5858 5859 5860 /* Master Lock INIT for info structure */ 5861 SCTP_INP_INFO_LOCK_INIT(); 5862 SCTP_STATLOG_INIT_LOCK(); 5863 5864 SCTP_IPI_COUNT_INIT(); 5865 SCTP_IPI_ADDR_INIT(); 5866 #ifdef SCTP_PACKET_LOGGING 5867 SCTP_IP_PKTLOG_INIT(); 5868 #endif 5869 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5870 5871 SCTP_WQ_ADDR_INIT(); 5872 /* not sure if we need all the counts */ 5873 SCTP_BASE_INFO(ipi_count_ep) = 0; 5874 /* assoc/tcb zone info */ 5875 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5876 /* local addrlist zone info */ 5877 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5878 /* remote addrlist zone info */ 5879 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5880 /* chunk info */ 5881 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5882 5883 /* socket queue zone info */ 5884 SCTP_BASE_INFO(ipi_count_readq) = 0; 5885 5886 /* stream out queue cont */ 5887 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5888 5889 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5890 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5891 5892 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5893 5894 /* Init the TIMEWAIT list */ 5895 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5896 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5897 } 5898 sctp_startup_iterator(); 5899 5900 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5901 sctp_startup_mcore_threads(); 5902 #endif 5903 5904 /* 5905 * INIT the default VRF which for BSD is the only one, other O/S's 5906 * may have more. But initially they must start with one and then 5907 * add the VRF's as addresses are added. 5908 */ 5909 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5910 } 5911 5912 /* 5913 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5914 */ 5915 void 5916 sctp_pcb_finish(void) 5917 { 5918 struct sctp_vrflist *vrf_bucket; 5919 struct sctp_vrf *vrf, *nvrf; 5920 struct sctp_ifn *ifn, *nifn; 5921 struct sctp_ifa *ifa, *nifa; 5922 struct sctpvtaghead *chain; 5923 struct sctp_tagblock *twait_block, *prev_twait_block; 5924 struct sctp_laddr *wi, *nwi; 5925 int i; 5926 struct sctp_iterator *it, *nit; 5927 5928 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5929 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5930 return; 5931 } 5932 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5933 /* 5934 * In FreeBSD the iterator thread never exits but we do clean up. 5935 * The only way FreeBSD reaches here is if we have VRF's but we 5936 * still add the ifdef to make it compile on old versions. 5937 */ 5938 retry: 5939 SCTP_IPI_ITERATOR_WQ_LOCK(); 5940 /* 5941 * sctp_iterator_worker() might be working on an it entry without 5942 * holding the lock. We won't find it on the list either and 5943 * continue and free/destroy it. While holding the lock, spin, to 5944 * avoid the race condition as sctp_iterator_worker() will have to 5945 * wait to re-aquire the lock. 5946 */ 5947 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5948 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5949 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5950 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5951 DELAY(10); 5952 goto retry; 5953 } 5954 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5955 if (it->vn != curvnet) { 5956 continue; 5957 } 5958 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5959 if (it->function_atend != NULL) { 5960 (*it->function_atend) (it->pointer, it->val); 5961 } 5962 SCTP_FREE(it, SCTP_M_ITER); 5963 } 5964 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5965 SCTP_ITERATOR_LOCK(); 5966 if ((sctp_it_ctl.cur_it) && 5967 (sctp_it_ctl.cur_it->vn == curvnet)) { 5968 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5969 } 5970 SCTP_ITERATOR_UNLOCK(); 5971 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5972 SCTP_WQ_ADDR_LOCK(); 5973 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5974 LIST_REMOVE(wi, sctp_nxt_addr); 5975 SCTP_DECR_LADDR_COUNT(); 5976 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5977 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5978 } 5979 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5980 } 5981 SCTP_WQ_ADDR_UNLOCK(); 5982 5983 /* 5984 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5985 * destroyed first). 5986 */ 5987 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5988 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5989 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5990 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5991 /* free the ifa */ 5992 LIST_REMOVE(ifa, next_bucket); 5993 LIST_REMOVE(ifa, next_ifa); 5994 SCTP_FREE(ifa, SCTP_M_IFA); 5995 } 5996 /* free the ifn */ 5997 LIST_REMOVE(ifn, next_bucket); 5998 LIST_REMOVE(ifn, next_ifn); 5999 SCTP_FREE(ifn, SCTP_M_IFN); 6000 } 6001 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 6002 /* free the vrf */ 6003 LIST_REMOVE(vrf, next_vrf); 6004 SCTP_FREE(vrf, SCTP_M_VRF); 6005 } 6006 /* free the vrf hashes */ 6007 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6008 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6009 6010 /* 6011 * free the TIMEWAIT list elements malloc'd in the function 6012 * sctp_add_vtag_to_timewait()... 6013 */ 6014 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6015 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6016 if (!LIST_EMPTY(chain)) { 6017 prev_twait_block = NULL; 6018 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6019 if (prev_twait_block) { 6020 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6021 } 6022 prev_twait_block = twait_block; 6023 } 6024 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6025 } 6026 } 6027 6028 /* free the locks and mutexes */ 6029 #ifdef SCTP_PACKET_LOGGING 6030 SCTP_IP_PKTLOG_DESTROY(); 6031 #endif 6032 SCTP_IPI_ADDR_DESTROY(); 6033 SCTP_STATLOG_DESTROY(); 6034 SCTP_INP_INFO_LOCK_DESTROY(); 6035 6036 SCTP_WQ_ADDR_DESTROY(); 6037 6038 /* Get rid of other stuff too. */ 6039 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6040 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6041 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6042 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6043 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6044 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6045 6046 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6047 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6048 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6049 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6050 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6051 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6052 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6053 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6054 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6055 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6056 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6057 #endif 6058 } 6059 6060 6061 int 6062 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6063 int offset, int limit, 6064 struct sockaddr *src, struct sockaddr *dst, 6065 struct sockaddr *altsa, uint16_t port) 6066 { 6067 /* 6068 * grub through the INIT pulling addresses and loading them to the 6069 * nets structure in the asoc. The from address in the mbuf should 6070 * also be loaded (if it is not already). This routine can be called 6071 * with either INIT or INIT-ACK's as long as the m points to the IP 6072 * packet and the offset points to the beginning of the parameters. 6073 */ 6074 struct sctp_inpcb *inp; 6075 struct sctp_nets *net, *nnet, *net_tmp; 6076 struct sctp_paramhdr *phdr, param_buf; 6077 struct sctp_tcb *stcb_tmp; 6078 uint16_t ptype, plen; 6079 struct sockaddr *sa; 6080 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6081 struct sctp_auth_random *p_random = NULL; 6082 uint16_t random_len = 0; 6083 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6084 struct sctp_auth_hmac_algo *hmacs = NULL; 6085 uint16_t hmacs_len = 0; 6086 uint8_t saw_asconf = 0; 6087 uint8_t saw_asconf_ack = 0; 6088 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6089 struct sctp_auth_chunk_list *chunks = NULL; 6090 uint16_t num_chunks = 0; 6091 sctp_key_t *new_key; 6092 uint32_t keylen; 6093 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6094 uint8_t peer_supports_ecn; 6095 uint8_t peer_supports_prsctp; 6096 uint8_t peer_supports_auth; 6097 uint8_t peer_supports_asconf; 6098 uint8_t peer_supports_asconf_ack; 6099 uint8_t peer_supports_reconfig; 6100 uint8_t peer_supports_nrsack; 6101 uint8_t peer_supports_pktdrop; 6102 uint8_t peer_supports_idata; 6103 #ifdef INET 6104 struct sockaddr_in sin; 6105 #endif 6106 #ifdef INET6 6107 struct sockaddr_in6 sin6; 6108 #endif 6109 6110 /* First get the destination address setup too. */ 6111 #ifdef INET 6112 memset(&sin, 0, sizeof(sin)); 6113 sin.sin_family = AF_INET; 6114 sin.sin_len = sizeof(sin); 6115 sin.sin_port = stcb->rport; 6116 #endif 6117 #ifdef INET6 6118 memset(&sin6, 0, sizeof(sin6)); 6119 sin6.sin6_family = AF_INET6; 6120 sin6.sin6_len = sizeof(struct sockaddr_in6); 6121 sin6.sin6_port = stcb->rport; 6122 #endif 6123 if (altsa) { 6124 sa = altsa; 6125 } else { 6126 sa = src; 6127 } 6128 peer_supports_idata = 0; 6129 peer_supports_ecn = 0; 6130 peer_supports_prsctp = 0; 6131 peer_supports_auth = 0; 6132 peer_supports_asconf = 0; 6133 peer_supports_reconfig = 0; 6134 peer_supports_nrsack = 0; 6135 peer_supports_pktdrop = 0; 6136 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6137 /* mark all addresses that we have currently on the list */ 6138 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6139 } 6140 /* does the source address already exist? if so skip it */ 6141 inp = stcb->sctp_ep; 6142 atomic_add_int(&stcb->asoc.refcnt, 1); 6143 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6144 atomic_add_int(&stcb->asoc.refcnt, -1); 6145 6146 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6147 /* we must add the source address */ 6148 /* no scope set here since we have a tcb already. */ 6149 switch (sa->sa_family) { 6150 #ifdef INET 6151 case AF_INET: 6152 if (stcb->asoc.scope.ipv4_addr_legal) { 6153 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6154 return (-1); 6155 } 6156 } 6157 break; 6158 #endif 6159 #ifdef INET6 6160 case AF_INET6: 6161 if (stcb->asoc.scope.ipv6_addr_legal) { 6162 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6163 return (-2); 6164 } 6165 } 6166 break; 6167 #endif 6168 default: 6169 break; 6170 } 6171 } else { 6172 if (net_tmp != NULL && stcb_tmp == stcb) { 6173 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6174 } else if (stcb_tmp != stcb) { 6175 /* It belongs to another association? */ 6176 if (stcb_tmp) 6177 SCTP_TCB_UNLOCK(stcb_tmp); 6178 return (-3); 6179 } 6180 } 6181 if (stcb->asoc.state == 0) { 6182 /* the assoc was freed? */ 6183 return (-4); 6184 } 6185 /* now we must go through each of the params. */ 6186 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6187 while (phdr) { 6188 ptype = ntohs(phdr->param_type); 6189 plen = ntohs(phdr->param_length); 6190 /* 6191 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6192 * (uint32_t)ptype, (int)plen); 6193 */ 6194 if (offset + plen > limit) { 6195 break; 6196 } 6197 if (plen == 0) { 6198 break; 6199 } 6200 #ifdef INET 6201 if (ptype == SCTP_IPV4_ADDRESS) { 6202 if (stcb->asoc.scope.ipv4_addr_legal) { 6203 struct sctp_ipv4addr_param *p4, p4_buf; 6204 6205 /* ok get the v4 address and check/add */ 6206 phdr = sctp_get_next_param(m, offset, 6207 (struct sctp_paramhdr *)&p4_buf, 6208 sizeof(p4_buf)); 6209 if (plen != sizeof(struct sctp_ipv4addr_param) || 6210 phdr == NULL) { 6211 return (-5); 6212 } 6213 p4 = (struct sctp_ipv4addr_param *)phdr; 6214 sin.sin_addr.s_addr = p4->addr; 6215 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6216 /* Skip multi-cast addresses */ 6217 goto next_param; 6218 } 6219 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6220 (sin.sin_addr.s_addr == INADDR_ANY)) { 6221 goto next_param; 6222 } 6223 sa = (struct sockaddr *)&sin; 6224 inp = stcb->sctp_ep; 6225 atomic_add_int(&stcb->asoc.refcnt, 1); 6226 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6227 dst, stcb); 6228 atomic_add_int(&stcb->asoc.refcnt, -1); 6229 6230 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6231 inp == NULL) { 6232 /* we must add the source address */ 6233 /* 6234 * no scope set since we have a tcb 6235 * already 6236 */ 6237 6238 /* 6239 * we must validate the state again 6240 * here 6241 */ 6242 add_it_now: 6243 if (stcb->asoc.state == 0) { 6244 /* the assoc was freed? */ 6245 return (-7); 6246 } 6247 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6248 return (-8); 6249 } 6250 } else if (stcb_tmp == stcb) { 6251 if (stcb->asoc.state == 0) { 6252 /* the assoc was freed? */ 6253 return (-10); 6254 } 6255 if (net != NULL) { 6256 /* clear flag */ 6257 net->dest_state &= 6258 ~SCTP_ADDR_NOT_IN_ASSOC; 6259 } 6260 } else { 6261 /* 6262 * strange, address is in another 6263 * assoc? straighten out locks. 6264 */ 6265 if (stcb_tmp) { 6266 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6267 struct mbuf *op_err; 6268 char msg[SCTP_DIAG_INFO_LEN]; 6269 6270 /* 6271 * in setup state we 6272 * abort this guy 6273 */ 6274 snprintf(msg, sizeof(msg), 6275 "%s:%d at %s", __FILE__, __LINE__, __func__); 6276 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6277 msg); 6278 sctp_abort_an_association(stcb_tmp->sctp_ep, 6279 stcb_tmp, op_err, 6280 SCTP_SO_NOT_LOCKED); 6281 goto add_it_now; 6282 } 6283 SCTP_TCB_UNLOCK(stcb_tmp); 6284 } 6285 if (stcb->asoc.state == 0) { 6286 /* the assoc was freed? */ 6287 return (-12); 6288 } 6289 return (-13); 6290 } 6291 } 6292 } else 6293 #endif 6294 #ifdef INET6 6295 if (ptype == SCTP_IPV6_ADDRESS) { 6296 if (stcb->asoc.scope.ipv6_addr_legal) { 6297 /* ok get the v6 address and check/add */ 6298 struct sctp_ipv6addr_param *p6, p6_buf; 6299 6300 phdr = sctp_get_next_param(m, offset, 6301 (struct sctp_paramhdr *)&p6_buf, 6302 sizeof(p6_buf)); 6303 if (plen != sizeof(struct sctp_ipv6addr_param) || 6304 phdr == NULL) { 6305 return (-14); 6306 } 6307 p6 = (struct sctp_ipv6addr_param *)phdr; 6308 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6309 sizeof(p6->addr)); 6310 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6311 /* Skip multi-cast addresses */ 6312 goto next_param; 6313 } 6314 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6315 /* 6316 * Link local make no sense without 6317 * scope 6318 */ 6319 goto next_param; 6320 } 6321 sa = (struct sockaddr *)&sin6; 6322 inp = stcb->sctp_ep; 6323 atomic_add_int(&stcb->asoc.refcnt, 1); 6324 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6325 dst, stcb); 6326 atomic_add_int(&stcb->asoc.refcnt, -1); 6327 if (stcb_tmp == NULL && 6328 (inp == stcb->sctp_ep || inp == NULL)) { 6329 /* 6330 * we must validate the state again 6331 * here 6332 */ 6333 add_it_now6: 6334 if (stcb->asoc.state == 0) { 6335 /* the assoc was freed? */ 6336 return (-16); 6337 } 6338 /* 6339 * we must add the address, no scope 6340 * set 6341 */ 6342 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6343 return (-17); 6344 } 6345 } else if (stcb_tmp == stcb) { 6346 /* 6347 * we must validate the state again 6348 * here 6349 */ 6350 if (stcb->asoc.state == 0) { 6351 /* the assoc was freed? */ 6352 return (-19); 6353 } 6354 if (net != NULL) { 6355 /* clear flag */ 6356 net->dest_state &= 6357 ~SCTP_ADDR_NOT_IN_ASSOC; 6358 } 6359 } else { 6360 /* 6361 * strange, address is in another 6362 * assoc? straighten out locks. 6363 */ 6364 if (stcb_tmp) { 6365 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6366 struct mbuf *op_err; 6367 char msg[SCTP_DIAG_INFO_LEN]; 6368 6369 /* 6370 * in setup state we 6371 * abort this guy 6372 */ 6373 snprintf(msg, sizeof(msg), 6374 "%s:%d at %s", __FILE__, __LINE__, __func__); 6375 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6376 msg); 6377 sctp_abort_an_association(stcb_tmp->sctp_ep, 6378 stcb_tmp, op_err, 6379 SCTP_SO_NOT_LOCKED); 6380 goto add_it_now6; 6381 } 6382 SCTP_TCB_UNLOCK(stcb_tmp); 6383 } 6384 if (stcb->asoc.state == 0) { 6385 /* the assoc was freed? */ 6386 return (-21); 6387 } 6388 return (-22); 6389 } 6390 } 6391 } else 6392 #endif 6393 if (ptype == SCTP_ECN_CAPABLE) { 6394 peer_supports_ecn = 1; 6395 } else if (ptype == SCTP_ULP_ADAPTATION) { 6396 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6397 struct sctp_adaptation_layer_indication ai, 6398 *aip; 6399 6400 phdr = sctp_get_next_param(m, offset, 6401 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6402 aip = (struct sctp_adaptation_layer_indication *)phdr; 6403 if (aip) { 6404 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6405 stcb->asoc.adaptation_needed = 1; 6406 } 6407 } 6408 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6409 struct sctp_asconf_addr_param lstore, *fee; 6410 int lptype; 6411 struct sockaddr *lsa = NULL; 6412 #ifdef INET 6413 struct sctp_asconf_addrv4_param *fii; 6414 #endif 6415 6416 if (stcb->asoc.asconf_supported == 0) { 6417 return (-100); 6418 } 6419 if (plen > sizeof(lstore)) { 6420 return (-23); 6421 } 6422 phdr = sctp_get_next_param(m, offset, 6423 (struct sctp_paramhdr *)&lstore, 6424 plen); 6425 if (phdr == NULL) { 6426 return (-24); 6427 } 6428 fee = (struct sctp_asconf_addr_param *)phdr; 6429 lptype = ntohs(fee->addrp.ph.param_type); 6430 switch (lptype) { 6431 #ifdef INET 6432 case SCTP_IPV4_ADDRESS: 6433 if (plen != 6434 sizeof(struct sctp_asconf_addrv4_param)) { 6435 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6436 (int)sizeof(struct sctp_asconf_addrv4_param), 6437 plen); 6438 } else { 6439 fii = (struct sctp_asconf_addrv4_param *)fee; 6440 sin.sin_addr.s_addr = fii->addrp.addr; 6441 lsa = (struct sockaddr *)&sin; 6442 } 6443 break; 6444 #endif 6445 #ifdef INET6 6446 case SCTP_IPV6_ADDRESS: 6447 if (plen != 6448 sizeof(struct sctp_asconf_addr_param)) { 6449 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6450 (int)sizeof(struct sctp_asconf_addr_param), 6451 plen); 6452 } else { 6453 memcpy(sin6.sin6_addr.s6_addr, 6454 fee->addrp.addr, 6455 sizeof(fee->addrp.addr)); 6456 lsa = (struct sockaddr *)&sin6; 6457 } 6458 break; 6459 #endif 6460 default: 6461 break; 6462 } 6463 if (lsa) { 6464 (void)sctp_set_primary_addr(stcb, sa, NULL); 6465 } 6466 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6467 stcb->asoc.peer_supports_nat = 1; 6468 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6469 /* Peer supports pr-sctp */ 6470 peer_supports_prsctp = 1; 6471 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6472 /* A supported extension chunk */ 6473 struct sctp_supported_chunk_types_param *pr_supported; 6474 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6475 int num_ent, i; 6476 6477 if (plen > sizeof(local_store)) { 6478 return (-35); 6479 } 6480 phdr = sctp_get_next_param(m, offset, 6481 (struct sctp_paramhdr *)&local_store, plen); 6482 if (phdr == NULL) { 6483 return (-25); 6484 } 6485 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6486 num_ent = plen - sizeof(struct sctp_paramhdr); 6487 for (i = 0; i < num_ent; i++) { 6488 switch (pr_supported->chunk_types[i]) { 6489 case SCTP_ASCONF: 6490 peer_supports_asconf = 1; 6491 break; 6492 case SCTP_ASCONF_ACK: 6493 peer_supports_asconf_ack = 1; 6494 break; 6495 case SCTP_FORWARD_CUM_TSN: 6496 peer_supports_prsctp = 1; 6497 break; 6498 case SCTP_PACKET_DROPPED: 6499 peer_supports_pktdrop = 1; 6500 break; 6501 case SCTP_NR_SELECTIVE_ACK: 6502 peer_supports_nrsack = 1; 6503 break; 6504 case SCTP_STREAM_RESET: 6505 peer_supports_reconfig = 1; 6506 break; 6507 case SCTP_AUTHENTICATION: 6508 peer_supports_auth = 1; 6509 break; 6510 case SCTP_IDATA: 6511 peer_supports_idata = 1; 6512 break; 6513 default: 6514 /* one I have not learned yet */ 6515 break; 6516 6517 } 6518 } 6519 } else if (ptype == SCTP_RANDOM) { 6520 if (plen > sizeof(random_store)) 6521 break; 6522 if (got_random) { 6523 /* already processed a RANDOM */ 6524 goto next_param; 6525 } 6526 phdr = sctp_get_next_param(m, offset, 6527 (struct sctp_paramhdr *)random_store, 6528 plen); 6529 if (phdr == NULL) 6530 return (-26); 6531 p_random = (struct sctp_auth_random *)phdr; 6532 random_len = plen - sizeof(*p_random); 6533 /* enforce the random length */ 6534 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6535 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6536 return (-27); 6537 } 6538 got_random = 1; 6539 } else if (ptype == SCTP_HMAC_LIST) { 6540 uint16_t num_hmacs; 6541 uint16_t i; 6542 6543 if (plen > sizeof(hmacs_store)) 6544 break; 6545 if (got_hmacs) { 6546 /* already processed a HMAC list */ 6547 goto next_param; 6548 } 6549 phdr = sctp_get_next_param(m, offset, 6550 (struct sctp_paramhdr *)hmacs_store, 6551 plen); 6552 if (phdr == NULL) 6553 return (-28); 6554 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6555 hmacs_len = plen - sizeof(*hmacs); 6556 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6557 /* validate the hmac list */ 6558 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6559 return (-29); 6560 } 6561 if (stcb->asoc.peer_hmacs != NULL) 6562 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6563 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6564 if (stcb->asoc.peer_hmacs != NULL) { 6565 for (i = 0; i < num_hmacs; i++) { 6566 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6567 ntohs(hmacs->hmac_ids[i])); 6568 } 6569 } 6570 got_hmacs = 1; 6571 } else if (ptype == SCTP_CHUNK_LIST) { 6572 int i; 6573 6574 if (plen > sizeof(chunks_store)) 6575 break; 6576 if (got_chklist) { 6577 /* already processed a Chunks list */ 6578 goto next_param; 6579 } 6580 phdr = sctp_get_next_param(m, offset, 6581 (struct sctp_paramhdr *)chunks_store, 6582 plen); 6583 if (phdr == NULL) 6584 return (-30); 6585 chunks = (struct sctp_auth_chunk_list *)phdr; 6586 num_chunks = plen - sizeof(*chunks); 6587 if (stcb->asoc.peer_auth_chunks != NULL) 6588 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6589 else 6590 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6591 for (i = 0; i < num_chunks; i++) { 6592 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6593 stcb->asoc.peer_auth_chunks); 6594 /* record asconf/asconf-ack if listed */ 6595 if (chunks->chunk_types[i] == SCTP_ASCONF) 6596 saw_asconf = 1; 6597 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6598 saw_asconf_ack = 1; 6599 6600 } 6601 got_chklist = 1; 6602 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6603 (ptype == SCTP_STATE_COOKIE) || 6604 (ptype == SCTP_UNRECOG_PARAM) || 6605 (ptype == SCTP_COOKIE_PRESERVE) || 6606 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6607 (ptype == SCTP_ADD_IP_ADDRESS) || 6608 (ptype == SCTP_DEL_IP_ADDRESS) || 6609 (ptype == SCTP_ERROR_CAUSE_IND) || 6610 (ptype == SCTP_SUCCESS_REPORT)) { 6611 /* don't care */ ; 6612 } else { 6613 if ((ptype & 0x8000) == 0x0000) { 6614 /* 6615 * must stop processing the rest of the 6616 * param's. Any report bits were handled 6617 * with the call to 6618 * sctp_arethere_unrecognized_parameters() 6619 * when the INIT or INIT-ACK was first seen. 6620 */ 6621 break; 6622 } 6623 } 6624 6625 next_param: 6626 offset += SCTP_SIZE32(plen); 6627 if (offset >= limit) { 6628 break; 6629 } 6630 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6631 sizeof(param_buf)); 6632 } 6633 /* Now check to see if we need to purge any addresses */ 6634 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6635 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6636 SCTP_ADDR_NOT_IN_ASSOC) { 6637 /* This address has been removed from the asoc */ 6638 /* remove and free it */ 6639 stcb->asoc.numnets--; 6640 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6641 sctp_free_remote_addr(net); 6642 if (net == stcb->asoc.primary_destination) { 6643 stcb->asoc.primary_destination = NULL; 6644 sctp_select_primary_destination(stcb); 6645 } 6646 } 6647 } 6648 if ((stcb->asoc.ecn_supported == 1) && 6649 (peer_supports_ecn == 0)) { 6650 stcb->asoc.ecn_supported = 0; 6651 } 6652 if ((stcb->asoc.prsctp_supported == 1) && 6653 (peer_supports_prsctp == 0)) { 6654 stcb->asoc.prsctp_supported = 0; 6655 } 6656 if ((stcb->asoc.auth_supported == 1) && 6657 ((peer_supports_auth == 0) || 6658 (got_random == 0) || (got_hmacs == 0))) { 6659 stcb->asoc.auth_supported = 0; 6660 } 6661 if ((stcb->asoc.asconf_supported == 1) && 6662 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6663 (stcb->asoc.auth_supported == 0) || 6664 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6665 stcb->asoc.asconf_supported = 0; 6666 } 6667 if ((stcb->asoc.reconfig_supported == 1) && 6668 (peer_supports_reconfig == 0)) { 6669 stcb->asoc.reconfig_supported = 0; 6670 } 6671 if ((stcb->asoc.idata_supported == 1) && 6672 (peer_supports_idata == 0)) { 6673 stcb->asoc.idata_supported = 0; 6674 } 6675 if ((stcb->asoc.nrsack_supported == 1) && 6676 (peer_supports_nrsack == 0)) { 6677 stcb->asoc.nrsack_supported = 0; 6678 } 6679 if ((stcb->asoc.pktdrop_supported == 1) && 6680 (peer_supports_pktdrop == 0)) { 6681 stcb->asoc.pktdrop_supported = 0; 6682 } 6683 /* validate authentication required parameters */ 6684 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6685 /* peer does not support auth but sent a chunks list? */ 6686 return (-31); 6687 } 6688 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6689 /* peer supports asconf but not auth? */ 6690 return (-32); 6691 } else if ((peer_supports_asconf == 1) && 6692 (peer_supports_auth == 1) && 6693 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6694 return (-33); 6695 } 6696 /* concatenate the full random key */ 6697 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6698 if (chunks != NULL) { 6699 keylen += sizeof(*chunks) + num_chunks; 6700 } 6701 new_key = sctp_alloc_key(keylen); 6702 if (new_key != NULL) { 6703 /* copy in the RANDOM */ 6704 if (p_random != NULL) { 6705 keylen = sizeof(*p_random) + random_len; 6706 memcpy(new_key->key, p_random, keylen); 6707 } else { 6708 keylen = 0; 6709 } 6710 /* append in the AUTH chunks */ 6711 if (chunks != NULL) { 6712 memcpy(new_key->key + keylen, chunks, 6713 sizeof(*chunks) + num_chunks); 6714 keylen += sizeof(*chunks) + num_chunks; 6715 } 6716 /* append in the HMACs */ 6717 if (hmacs != NULL) { 6718 memcpy(new_key->key + keylen, hmacs, 6719 sizeof(*hmacs) + hmacs_len); 6720 } 6721 } else { 6722 /* failed to get memory for the key */ 6723 return (-34); 6724 } 6725 if (stcb->asoc.authinfo.peer_random != NULL) 6726 sctp_free_key(stcb->asoc.authinfo.peer_random); 6727 stcb->asoc.authinfo.peer_random = new_key; 6728 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6729 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6730 6731 return (0); 6732 } 6733 6734 int 6735 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6736 struct sctp_nets *net) 6737 { 6738 /* make sure the requested primary address exists in the assoc */ 6739 if (net == NULL && sa) 6740 net = sctp_findnet(stcb, sa); 6741 6742 if (net == NULL) { 6743 /* didn't find the requested primary address! */ 6744 return (-1); 6745 } else { 6746 /* set the primary address */ 6747 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6748 /* Must be confirmed, so queue to set */ 6749 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6750 return (0); 6751 } 6752 stcb->asoc.primary_destination = net; 6753 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6754 sctp_free_remote_addr(stcb->asoc.alternate); 6755 stcb->asoc.alternate = NULL; 6756 } 6757 net = TAILQ_FIRST(&stcb->asoc.nets); 6758 if (net != stcb->asoc.primary_destination) { 6759 /* 6760 * first one on the list is NOT the primary 6761 * sctp_cmpaddr() is much more efficient if the 6762 * primary is the first on the list, make it so. 6763 */ 6764 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6765 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6766 } 6767 return (0); 6768 } 6769 } 6770 6771 int 6772 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6773 { 6774 /* 6775 * This function serves two purposes. It will see if a TAG can be 6776 * re-used and return 1 for yes it is ok and 0 for don't use that 6777 * tag. A secondary function it will do is purge out old tags that 6778 * can be removed. 6779 */ 6780 struct sctpvtaghead *chain; 6781 struct sctp_tagblock *twait_block; 6782 struct sctpasochead *head; 6783 struct sctp_tcb *stcb; 6784 int i; 6785 6786 SCTP_INP_INFO_RLOCK(); 6787 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6788 SCTP_BASE_INFO(hashasocmark))]; 6789 LIST_FOREACH(stcb, head, sctp_asocs) { 6790 /* 6791 * We choose not to lock anything here. TCB's can't be 6792 * removed since we have the read lock, so they can't be 6793 * freed on us, same thing for the INP. I may be wrong with 6794 * this assumption, but we will go with it for now :-) 6795 */ 6796 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6797 continue; 6798 } 6799 if (stcb->asoc.my_vtag == tag) { 6800 /* candidate */ 6801 if (stcb->rport != rport) { 6802 continue; 6803 } 6804 if (stcb->sctp_ep->sctp_lport != lport) { 6805 continue; 6806 } 6807 /* Its a used tag set */ 6808 SCTP_INP_INFO_RUNLOCK(); 6809 return (0); 6810 } 6811 } 6812 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6813 /* Now what about timed wait ? */ 6814 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6815 /* 6816 * Block(s) are present, lets see if we have this tag in the 6817 * list 6818 */ 6819 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6820 if (twait_block->vtag_block[i].v_tag == 0) { 6821 /* not used */ 6822 continue; 6823 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6824 now->tv_sec) { 6825 /* Audit expires this guy */ 6826 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6827 twait_block->vtag_block[i].v_tag = 0; 6828 twait_block->vtag_block[i].lport = 0; 6829 twait_block->vtag_block[i].rport = 0; 6830 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6831 (twait_block->vtag_block[i].lport == lport) && 6832 (twait_block->vtag_block[i].rport == rport)) { 6833 /* Bad tag, sorry :< */ 6834 SCTP_INP_INFO_RUNLOCK(); 6835 return (0); 6836 } 6837 } 6838 } 6839 SCTP_INP_INFO_RUNLOCK(); 6840 return (1); 6841 } 6842 6843 static void 6844 sctp_drain_mbufs(struct sctp_tcb *stcb) 6845 { 6846 /* 6847 * We must hunt this association for MBUF's past the cumack (i.e. 6848 * out of order data that we can renege on). 6849 */ 6850 struct sctp_association *asoc; 6851 struct sctp_tmit_chunk *chk, *nchk; 6852 uint32_t cumulative_tsn_p1; 6853 struct sctp_queued_to_read *control, *ncontrol; 6854 int cnt, strmat; 6855 uint32_t gap, i; 6856 int fnd = 0; 6857 6858 /* We look for anything larger than the cum-ack + 1 */ 6859 6860 asoc = &stcb->asoc; 6861 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6862 /* none we can reneg on. */ 6863 return; 6864 } 6865 SCTP_STAT_INCR(sctps_protocol_drains_done); 6866 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6867 cnt = 0; 6868 /* Ok that was fun, now we will drain all the inbound streams? */ 6869 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6870 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6871 #ifdef INVARIANTS 6872 if (control->on_strm_q != SCTP_ON_ORDERED) { 6873 panic("Huh control: %p on_q: %d -- not ordered?", 6874 control, control->on_strm_q); 6875 } 6876 #endif 6877 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6878 /* Yep it is above cum-ack */ 6879 cnt++; 6880 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6881 KASSERT(control->length > 0, ("control has zero length")); 6882 if (asoc->size_on_all_streams >= control->length) { 6883 asoc->size_on_all_streams -= control->length; 6884 } else { 6885 #ifdef INVARIANTS 6886 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6887 #else 6888 asoc->size_on_all_streams = 0; 6889 #endif 6890 } 6891 sctp_ucount_decr(asoc->cnt_on_all_streams); 6892 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6893 if (control->on_read_q) { 6894 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6895 control->on_read_q = 0; 6896 } 6897 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6898 control->on_strm_q = 0; 6899 if (control->data) { 6900 sctp_m_freem(control->data); 6901 control->data = NULL; 6902 } 6903 sctp_free_remote_addr(control->whoFrom); 6904 /* Now its reasm? */ 6905 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6906 cnt++; 6907 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6908 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6909 if (asoc->size_on_reasm_queue >= chk->send_size) { 6910 asoc->size_on_reasm_queue -= chk->send_size; 6911 } else { 6912 #ifdef INVARIANTS 6913 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6914 #else 6915 asoc->size_on_reasm_queue = 0; 6916 #endif 6917 } 6918 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6919 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6920 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6921 if (chk->data) { 6922 sctp_m_freem(chk->data); 6923 chk->data = NULL; 6924 } 6925 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6926 } 6927 sctp_free_a_readq(stcb, control); 6928 } 6929 } 6930 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6931 #ifdef INVARIANTS 6932 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6933 panic("Huh control: %p on_q: %d -- not unordered?", 6934 control, control->on_strm_q); 6935 } 6936 #endif 6937 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6938 /* Yep it is above cum-ack */ 6939 cnt++; 6940 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6941 KASSERT(control->length > 0, ("control has zero length")); 6942 if (asoc->size_on_all_streams >= control->length) { 6943 asoc->size_on_all_streams -= control->length; 6944 } else { 6945 #ifdef INVARIANTS 6946 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6947 #else 6948 asoc->size_on_all_streams = 0; 6949 #endif 6950 } 6951 sctp_ucount_decr(asoc->cnt_on_all_streams); 6952 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6953 if (control->on_read_q) { 6954 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6955 control->on_read_q = 0; 6956 } 6957 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6958 control->on_strm_q = 0; 6959 if (control->data) { 6960 sctp_m_freem(control->data); 6961 control->data = NULL; 6962 } 6963 sctp_free_remote_addr(control->whoFrom); 6964 /* Now its reasm? */ 6965 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6966 cnt++; 6967 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6968 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6969 if (asoc->size_on_reasm_queue >= chk->send_size) { 6970 asoc->size_on_reasm_queue -= chk->send_size; 6971 } else { 6972 #ifdef INVARIANTS 6973 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6974 #else 6975 asoc->size_on_reasm_queue = 0; 6976 #endif 6977 } 6978 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6979 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6980 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6981 if (chk->data) { 6982 sctp_m_freem(chk->data); 6983 chk->data = NULL; 6984 } 6985 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6986 } 6987 sctp_free_a_readq(stcb, control); 6988 } 6989 } 6990 } 6991 if (cnt) { 6992 /* We must back down to see what the new highest is */ 6993 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6994 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6995 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6996 asoc->highest_tsn_inside_map = i; 6997 fnd = 1; 6998 break; 6999 } 7000 } 7001 if (!fnd) { 7002 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 7003 } 7004 /* 7005 * Question, should we go through the delivery queue? The 7006 * only reason things are on here is the app not reading OR 7007 * a p-d-api up. An attacker COULD send enough in to 7008 * initiate the PD-API and then send a bunch of stuff to 7009 * other streams... these would wind up on the delivery 7010 * queue.. and then we would not get to them. But in order 7011 * to do this I then have to back-track and un-deliver 7012 * sequence numbers in streams.. el-yucko. I think for now 7013 * we will NOT look at the delivery queue and leave it to be 7014 * something to consider later. An alternative would be to 7015 * abort the P-D-API with a notification and then deliver 7016 * the data.... Or another method might be to keep track of 7017 * how many times the situation occurs and if we see a 7018 * possible attack underway just abort the association. 7019 */ 7020 #ifdef SCTP_DEBUG 7021 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 7022 #endif 7023 /* 7024 * Now do we need to find a new 7025 * asoc->highest_tsn_inside_map? 7026 */ 7027 asoc->last_revoke_count = cnt; 7028 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 7029 /* sa_ignore NO_NULL_CHK */ 7030 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 7031 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 7032 } 7033 /* 7034 * Another issue, in un-setting the TSN's in the mapping array we 7035 * DID NOT adjust the highest_tsn marker. This will cause one of 7036 * two things to occur. It may cause us to do extra work in checking 7037 * for our mapping array movement. More importantly it may cause us 7038 * to SACK every datagram. This may not be a bad thing though since 7039 * we will recover once we get our cum-ack above and all this stuff 7040 * we dumped recovered. 7041 */ 7042 } 7043 7044 void 7045 sctp_drain() 7046 { 7047 /* 7048 * We must walk the PCB lists for ALL associations here. The system 7049 * is LOW on MBUF's and needs help. This is where reneging will 7050 * occur. We really hope this does NOT happen! 7051 */ 7052 VNET_ITERATOR_DECL(vnet_iter); 7053 VNET_LIST_RLOCK_NOSLEEP(); 7054 VNET_FOREACH(vnet_iter) { 7055 CURVNET_SET(vnet_iter); 7056 struct sctp_inpcb *inp; 7057 struct sctp_tcb *stcb; 7058 7059 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7060 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7061 #ifdef VIMAGE 7062 continue; 7063 #else 7064 return; 7065 #endif 7066 } 7067 SCTP_INP_INFO_RLOCK(); 7068 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7069 /* For each endpoint */ 7070 SCTP_INP_RLOCK(inp); 7071 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7072 /* For each association */ 7073 SCTP_TCB_LOCK(stcb); 7074 sctp_drain_mbufs(stcb); 7075 SCTP_TCB_UNLOCK(stcb); 7076 } 7077 SCTP_INP_RUNLOCK(inp); 7078 } 7079 SCTP_INP_INFO_RUNLOCK(); 7080 CURVNET_RESTORE(); 7081 } 7082 VNET_LIST_RUNLOCK_NOSLEEP(); 7083 } 7084 7085 /* 7086 * start a new iterator 7087 * iterates through all endpoints and associations based on the pcb_state 7088 * flags and asoc_state. "af" (mandatory) is executed for all matching 7089 * assocs and "ef" (optional) is executed when the iterator completes. 7090 * "inpf" (optional) is executed for each new endpoint as it is being 7091 * iterated through. inpe (optional) is called when the inp completes 7092 * its way through all the stcbs. 7093 */ 7094 int 7095 sctp_initiate_iterator(inp_func inpf, 7096 asoc_func af, 7097 inp_func inpe, 7098 uint32_t pcb_state, 7099 uint32_t pcb_features, 7100 uint32_t asoc_state, 7101 void *argp, 7102 uint32_t argi, 7103 end_func ef, 7104 struct sctp_inpcb *s_inp, 7105 uint8_t chunk_output_off) 7106 { 7107 struct sctp_iterator *it = NULL; 7108 7109 if (af == NULL) { 7110 return (-1); 7111 } 7112 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7113 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7114 SCTP_BASE_VAR(sctp_pcb_initialized)); 7115 return (-1); 7116 } 7117 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7118 SCTP_M_ITER); 7119 if (it == NULL) { 7120 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7121 return (ENOMEM); 7122 } 7123 memset(it, 0, sizeof(*it)); 7124 it->function_assoc = af; 7125 it->function_inp = inpf; 7126 if (inpf) 7127 it->done_current_ep = 0; 7128 else 7129 it->done_current_ep = 1; 7130 it->function_atend = ef; 7131 it->pointer = argp; 7132 it->val = argi; 7133 it->pcb_flags = pcb_state; 7134 it->pcb_features = pcb_features; 7135 it->asoc_state = asoc_state; 7136 it->function_inp_end = inpe; 7137 it->no_chunk_output = chunk_output_off; 7138 it->vn = curvnet; 7139 if (s_inp) { 7140 /* Assume lock is held here */ 7141 it->inp = s_inp; 7142 SCTP_INP_INCR_REF(it->inp); 7143 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7144 } else { 7145 SCTP_INP_INFO_RLOCK(); 7146 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7147 if (it->inp) { 7148 SCTP_INP_INCR_REF(it->inp); 7149 } 7150 SCTP_INP_INFO_RUNLOCK(); 7151 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7152 7153 } 7154 SCTP_IPI_ITERATOR_WQ_LOCK(); 7155 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7156 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7157 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7158 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7159 SCTP_FREE(it, SCTP_M_ITER); 7160 return (-1); 7161 } 7162 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7163 if (sctp_it_ctl.iterator_running == 0) { 7164 sctp_wakeup_iterator(); 7165 } 7166 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7167 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7168 return (0); 7169 } 7170