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 } 188 189 /* Add it to the hash table */ 190 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 191 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 192 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 193 return (vrf); 194 } 195 196 197 struct sctp_ifn * 198 sctp_find_ifn(void *ifn, uint32_t ifn_index) 199 { 200 struct sctp_ifn *sctp_ifnp; 201 struct sctp_ifnlist *hash_ifn_head; 202 203 /* 204 * We assume the lock is held for the addresses if that's wrong 205 * problems could occur :-) 206 */ 207 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 208 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 209 if (sctp_ifnp->ifn_index == ifn_index) { 210 return (sctp_ifnp); 211 } 212 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 213 return (sctp_ifnp); 214 } 215 } 216 return (NULL); 217 } 218 219 220 struct sctp_vrf * 221 sctp_find_vrf(uint32_t vrf_id) 222 { 223 struct sctp_vrflist *bucket; 224 struct sctp_vrf *liste; 225 226 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 227 LIST_FOREACH(liste, bucket, next_vrf) { 228 if (vrf_id == liste->vrf_id) { 229 return (liste); 230 } 231 } 232 return (NULL); 233 } 234 235 236 void 237 sctp_free_vrf(struct sctp_vrf *vrf) 238 { 239 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 240 if (vrf->vrf_addr_hash) { 241 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 242 vrf->vrf_addr_hash = NULL; 243 } 244 /* We zero'd the count */ 245 LIST_REMOVE(vrf, next_vrf); 246 SCTP_FREE(vrf, SCTP_M_VRF); 247 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 248 } 249 } 250 251 252 void 253 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 254 { 255 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 256 /* We zero'd the count */ 257 if (sctp_ifnp->vrf) { 258 sctp_free_vrf(sctp_ifnp->vrf); 259 } 260 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 261 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 262 } 263 } 264 265 266 void 267 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 268 { 269 struct sctp_ifn *sctp_ifnp; 270 271 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 272 if (sctp_ifnp != NULL) { 273 sctp_ifnp->ifn_mtu = mtu; 274 } 275 } 276 277 278 void 279 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 280 { 281 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 282 /* We zero'd the count */ 283 if (sctp_ifap->ifn_p) { 284 sctp_free_ifn(sctp_ifap->ifn_p); 285 } 286 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 287 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 288 } 289 } 290 291 292 static void 293 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 294 { 295 struct sctp_ifn *found; 296 297 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 298 if (found == NULL) { 299 /* Not in the list.. sorry */ 300 return; 301 } 302 if (hold_addr_lock == 0) 303 SCTP_IPI_ADDR_WLOCK(); 304 LIST_REMOVE(sctp_ifnp, next_bucket); 305 LIST_REMOVE(sctp_ifnp, next_ifn); 306 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 307 sctp_ifnp->registered_af); 308 if (hold_addr_lock == 0) 309 SCTP_IPI_ADDR_WUNLOCK(); 310 /* Take away the reference, and possibly free it */ 311 sctp_free_ifn(sctp_ifnp); 312 } 313 314 315 void 316 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 317 const char *if_name, uint32_t ifn_index) 318 { 319 struct sctp_vrf *vrf; 320 struct sctp_ifa *sctp_ifap; 321 322 SCTP_IPI_ADDR_RLOCK(); 323 vrf = sctp_find_vrf(vrf_id); 324 if (vrf == NULL) { 325 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 326 goto out; 327 328 } 329 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 330 if (sctp_ifap == NULL) { 331 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 332 goto out; 333 } 334 if (sctp_ifap->ifn_p == NULL) { 335 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 336 goto out; 337 } 338 if (if_name) { 339 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 340 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 341 sctp_ifap->ifn_p->ifn_name, if_name); 342 goto out; 343 } 344 } else { 345 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 346 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 347 sctp_ifap->ifn_p->ifn_index, ifn_index); 348 goto out; 349 } 350 } 351 352 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 353 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 354 out: 355 SCTP_IPI_ADDR_RUNLOCK(); 356 } 357 358 359 void 360 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 361 const char *if_name, uint32_t ifn_index) 362 { 363 struct sctp_vrf *vrf; 364 struct sctp_ifa *sctp_ifap; 365 366 SCTP_IPI_ADDR_RLOCK(); 367 vrf = sctp_find_vrf(vrf_id); 368 if (vrf == NULL) { 369 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 370 goto out; 371 372 } 373 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 374 if (sctp_ifap == NULL) { 375 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 376 goto out; 377 } 378 if (sctp_ifap->ifn_p == NULL) { 379 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 380 goto out; 381 } 382 if (if_name) { 383 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 384 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 385 sctp_ifap->ifn_p->ifn_name, if_name); 386 goto out; 387 } 388 } else { 389 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 390 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 391 sctp_ifap->ifn_p->ifn_index, ifn_index); 392 goto out; 393 } 394 } 395 396 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 397 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 398 out: 399 SCTP_IPI_ADDR_RUNLOCK(); 400 } 401 402 403 /*- 404 * Add an ifa to an ifn. 405 * Register the interface as necessary. 406 * NOTE: ADDR write lock MUST be held. 407 */ 408 static void 409 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 410 { 411 int ifa_af; 412 413 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 414 sctp_ifap->ifn_p = sctp_ifnp; 415 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 416 /* update address counts */ 417 sctp_ifnp->ifa_count++; 418 ifa_af = sctp_ifap->address.sa.sa_family; 419 switch (ifa_af) { 420 #ifdef INET 421 case AF_INET: 422 sctp_ifnp->num_v4++; 423 break; 424 #endif 425 #ifdef INET6 426 case AF_INET6: 427 sctp_ifnp->num_v6++; 428 break; 429 #endif 430 default: 431 break; 432 } 433 if (sctp_ifnp->ifa_count == 1) { 434 /* register the new interface */ 435 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 436 sctp_ifnp->registered_af = ifa_af; 437 } 438 } 439 440 441 /*- 442 * Remove an ifa from its ifn. 443 * If no more addresses exist, remove the ifn too. Otherwise, re-register 444 * the interface based on the remaining address families left. 445 * NOTE: ADDR write lock MUST be held. 446 */ 447 static void 448 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 449 { 450 LIST_REMOVE(sctp_ifap, next_ifa); 451 if (sctp_ifap->ifn_p) { 452 /* update address counts */ 453 sctp_ifap->ifn_p->ifa_count--; 454 switch (sctp_ifap->address.sa.sa_family) { 455 #ifdef INET 456 case AF_INET: 457 sctp_ifap->ifn_p->num_v4--; 458 break; 459 #endif 460 #ifdef INET6 461 case AF_INET6: 462 sctp_ifap->ifn_p->num_v6--; 463 break; 464 #endif 465 default: 466 break; 467 } 468 469 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 470 /* remove the ifn, possibly freeing it */ 471 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 472 } else { 473 /* re-register address family type, if needed */ 474 if ((sctp_ifap->ifn_p->num_v6 == 0) && 475 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 476 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 477 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 478 sctp_ifap->ifn_p->registered_af = AF_INET; 479 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 480 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 481 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 482 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 483 sctp_ifap->ifn_p->registered_af = AF_INET6; 484 } 485 /* free the ifn refcount */ 486 sctp_free_ifn(sctp_ifap->ifn_p); 487 } 488 sctp_ifap->ifn_p = NULL; 489 } 490 } 491 492 493 struct sctp_ifa * 494 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 495 uint32_t ifn_type, const char *if_name, void *ifa, 496 struct sockaddr *addr, uint32_t ifa_flags, 497 int dynamic_add) 498 { 499 struct sctp_vrf *vrf; 500 struct sctp_ifn *sctp_ifnp = NULL; 501 struct sctp_ifa *sctp_ifap = NULL; 502 struct sctp_ifalist *hash_addr_head; 503 struct sctp_ifnlist *hash_ifn_head; 504 uint32_t hash_of_addr; 505 int new_ifn_af = 0; 506 507 #ifdef SCTP_DEBUG 508 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 509 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 510 #endif 511 SCTP_IPI_ADDR_WLOCK(); 512 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 513 if (sctp_ifnp) { 514 vrf = sctp_ifnp->vrf; 515 } else { 516 vrf = sctp_find_vrf(vrf_id); 517 if (vrf == NULL) { 518 vrf = sctp_allocate_vrf(vrf_id); 519 if (vrf == NULL) { 520 SCTP_IPI_ADDR_WUNLOCK(); 521 return (NULL); 522 } 523 } 524 } 525 if (sctp_ifnp == NULL) { 526 /* 527 * build one and add it, can't hold lock until after malloc 528 * done though. 529 */ 530 SCTP_IPI_ADDR_WUNLOCK(); 531 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 532 sizeof(struct sctp_ifn), SCTP_M_IFN); 533 if (sctp_ifnp == NULL) { 534 #ifdef INVARIANTS 535 panic("No memory for IFN"); 536 #endif 537 return (NULL); 538 } 539 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 540 sctp_ifnp->ifn_index = ifn_index; 541 sctp_ifnp->ifn_p = ifn; 542 sctp_ifnp->ifn_type = ifn_type; 543 sctp_ifnp->refcount = 0; 544 sctp_ifnp->vrf = vrf; 545 atomic_add_int(&vrf->refcount, 1); 546 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 547 if (if_name != NULL) { 548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 549 } else { 550 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 551 } 552 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 553 LIST_INIT(&sctp_ifnp->ifalist); 554 SCTP_IPI_ADDR_WLOCK(); 555 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 556 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 557 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 558 new_ifn_af = 1; 559 } 560 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 561 if (sctp_ifap) { 562 /* Hmm, it already exists? */ 563 if ((sctp_ifap->ifn_p) && 564 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 565 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 566 sctp_ifap->ifn_p->ifn_name, ifn_index, 567 (void *)sctp_ifap); 568 if (new_ifn_af) { 569 /* Remove the created one that we don't want */ 570 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 571 } 572 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 573 /* easy to solve, just switch back to active */ 574 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 575 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 576 sctp_ifap->ifn_p = sctp_ifnp; 577 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 578 } 579 exit_stage_left: 580 SCTP_IPI_ADDR_WUNLOCK(); 581 return (sctp_ifap); 582 } else { 583 if (sctp_ifap->ifn_p) { 584 /* 585 * The last IFN gets the address, remove the 586 * old one 587 */ 588 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 589 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 590 sctp_ifap->ifn_p->ifn_index, if_name, 591 ifn_index); 592 /* remove the address from the old ifn */ 593 sctp_remove_ifa_from_ifn(sctp_ifap); 594 /* move the address over to the new ifn */ 595 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 596 goto exit_stage_left; 597 } else { 598 /* repair ifnp which was NULL ? */ 599 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 600 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 601 (void *)sctp_ifnp, (void *)sctp_ifap); 602 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 603 } 604 goto exit_stage_left; 605 } 606 } 607 SCTP_IPI_ADDR_WUNLOCK(); 608 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 609 if (sctp_ifap == NULL) { 610 #ifdef INVARIANTS 611 panic("No memory for IFA"); 612 #endif 613 return (NULL); 614 } 615 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 616 sctp_ifap->ifn_p = sctp_ifnp; 617 atomic_add_int(&sctp_ifnp->refcount, 1); 618 sctp_ifap->vrf_id = vrf_id; 619 sctp_ifap->ifa = ifa; 620 memcpy(&sctp_ifap->address, addr, addr->sa_len); 621 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 622 sctp_ifap->flags = ifa_flags; 623 /* Set scope */ 624 switch (sctp_ifap->address.sa.sa_family) { 625 #ifdef INET 626 case AF_INET: 627 { 628 struct sockaddr_in *sin; 629 630 sin = &sctp_ifap->address.sin; 631 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 632 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 633 sctp_ifap->src_is_loop = 1; 634 } 635 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 636 sctp_ifap->src_is_priv = 1; 637 } 638 sctp_ifnp->num_v4++; 639 if (new_ifn_af) 640 new_ifn_af = AF_INET; 641 break; 642 } 643 #endif 644 #ifdef INET6 645 case AF_INET6: 646 { 647 /* ok to use deprecated addresses? */ 648 struct sockaddr_in6 *sin6; 649 650 sin6 = &sctp_ifap->address.sin6; 651 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 652 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 653 sctp_ifap->src_is_loop = 1; 654 } 655 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 656 sctp_ifap->src_is_priv = 1; 657 } 658 sctp_ifnp->num_v6++; 659 if (new_ifn_af) 660 new_ifn_af = AF_INET6; 661 break; 662 } 663 #endif 664 default: 665 new_ifn_af = 0; 666 break; 667 } 668 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 669 670 if ((sctp_ifap->src_is_priv == 0) && 671 (sctp_ifap->src_is_loop == 0)) { 672 sctp_ifap->src_is_glob = 1; 673 } 674 SCTP_IPI_ADDR_WLOCK(); 675 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 676 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 677 sctp_ifap->refcount = 1; 678 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 679 sctp_ifnp->ifa_count++; 680 vrf->total_ifa_count++; 681 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 682 if (new_ifn_af) { 683 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 684 sctp_ifnp->registered_af = new_ifn_af; 685 } 686 SCTP_IPI_ADDR_WUNLOCK(); 687 if (dynamic_add) { 688 /* 689 * Bump up the refcount so that when the timer completes it 690 * will drop back down. 691 */ 692 struct sctp_laddr *wi; 693 694 atomic_add_int(&sctp_ifap->refcount, 1); 695 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 696 if (wi == NULL) { 697 /* 698 * Gak, what can we do? We have lost an address 699 * change can you say HOSED? 700 */ 701 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 702 /* Opps, must decrement the count */ 703 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 704 if_name); 705 return (NULL); 706 } 707 SCTP_INCR_LADDR_COUNT(); 708 memset(wi, 0, sizeof(*wi)); 709 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 710 wi->ifa = sctp_ifap; 711 wi->action = SCTP_ADD_IP_ADDRESS; 712 713 SCTP_WQ_ADDR_LOCK(); 714 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 715 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 716 (struct sctp_inpcb *)NULL, 717 (struct sctp_tcb *)NULL, 718 (struct sctp_nets *)NULL); 719 SCTP_WQ_ADDR_UNLOCK(); 720 } else { 721 /* it's ready for use */ 722 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 723 } 724 return (sctp_ifap); 725 } 726 727 void 728 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 729 uint32_t ifn_index, const char *if_name) 730 { 731 struct sctp_vrf *vrf; 732 struct sctp_ifa *sctp_ifap = NULL; 733 734 SCTP_IPI_ADDR_WLOCK(); 735 vrf = sctp_find_vrf(vrf_id); 736 if (vrf == NULL) { 737 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 738 goto out_now; 739 } 740 741 #ifdef SCTP_DEBUG 742 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 743 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 744 #endif 745 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 746 if (sctp_ifap) { 747 /* Validate the delete */ 748 if (sctp_ifap->ifn_p) { 749 int valid = 0; 750 751 /*- 752 * The name has priority over the ifn_index 753 * if its given. We do this especially for 754 * panda who might recycle indexes fast. 755 */ 756 if (if_name) { 757 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 758 /* They match its a correct delete */ 759 valid = 1; 760 } 761 } 762 if (!valid) { 763 /* last ditch check ifn_index */ 764 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 765 valid = 1; 766 } 767 } 768 if (!valid) { 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 770 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 771 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 772 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 773 SCTP_IPI_ADDR_WUNLOCK(); 774 return; 775 } 776 } 777 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 778 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 779 /* 780 * We don't set the flag. This means that the structure will 781 * hang around in EP's that have bound specific to it until 782 * they close. This gives us TCP like behavior if someone 783 * removes an address (or for that matter adds it right 784 * back). 785 */ 786 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 787 vrf->total_ifa_count--; 788 LIST_REMOVE(sctp_ifap, next_bucket); 789 sctp_remove_ifa_from_ifn(sctp_ifap); 790 } 791 #ifdef SCTP_DEBUG 792 else { 793 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 794 ifn_index); 795 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 796 } 797 #endif 798 799 out_now: 800 SCTP_IPI_ADDR_WUNLOCK(); 801 if (sctp_ifap) { 802 struct sctp_laddr *wi; 803 804 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 805 if (wi == NULL) { 806 /* 807 * Gak, what can we do? We have lost an address 808 * change can you say HOSED? 809 */ 810 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 811 812 /* Oops, must decrement the count */ 813 sctp_free_ifa(sctp_ifap); 814 return; 815 } 816 SCTP_INCR_LADDR_COUNT(); 817 memset(wi, 0, sizeof(*wi)); 818 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 819 wi->ifa = sctp_ifap; 820 wi->action = SCTP_DEL_IP_ADDRESS; 821 SCTP_WQ_ADDR_LOCK(); 822 /* 823 * Should this really be a tailq? As it is we will process 824 * the newest first :-0 825 */ 826 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 827 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 828 (struct sctp_inpcb *)NULL, 829 (struct sctp_tcb *)NULL, 830 (struct sctp_nets *)NULL); 831 SCTP_WQ_ADDR_UNLOCK(); 832 } 833 return; 834 } 835 836 837 static int 838 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 839 { 840 int loopback_scope; 841 #if defined(INET) 842 int ipv4_local_scope, ipv4_addr_legal; 843 #endif 844 #if defined(INET6) 845 int local_scope, site_scope, ipv6_addr_legal; 846 #endif 847 struct sctp_vrf *vrf; 848 struct sctp_ifn *sctp_ifn; 849 struct sctp_ifa *sctp_ifa; 850 851 loopback_scope = stcb->asoc.scope.loopback_scope; 852 #if defined(INET) 853 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 854 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 855 #endif 856 #if defined(INET6) 857 local_scope = stcb->asoc.scope.local_scope; 858 site_scope = stcb->asoc.scope.site_scope; 859 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 860 #endif 861 862 SCTP_IPI_ADDR_RLOCK(); 863 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 864 if (vrf == NULL) { 865 /* no vrf, no addresses */ 866 SCTP_IPI_ADDR_RUNLOCK(); 867 return (0); 868 } 869 870 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 871 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 872 if ((loopback_scope == 0) && 873 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 874 continue; 875 } 876 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 877 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 878 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 879 /* 880 * We allow pending addresses, where 881 * we have sent an asconf-add to be 882 * considered valid. 883 */ 884 continue; 885 } 886 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 887 continue; 888 } 889 switch (sctp_ifa->address.sa.sa_family) { 890 #ifdef INET 891 case AF_INET: 892 if (ipv4_addr_legal) { 893 struct sockaddr_in *sin, 894 *rsin; 895 896 sin = &sctp_ifa->address.sin; 897 rsin = (struct sockaddr_in *)to; 898 if ((ipv4_local_scope == 0) && 899 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 900 continue; 901 } 902 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 903 &sin->sin_addr) != 0) { 904 continue; 905 } 906 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 907 SCTP_IPI_ADDR_RUNLOCK(); 908 return (1); 909 } 910 } 911 break; 912 #endif 913 #ifdef INET6 914 case AF_INET6: 915 if (ipv6_addr_legal) { 916 struct sockaddr_in6 *sin6, 917 *rsin6; 918 919 sin6 = &sctp_ifa->address.sin6; 920 rsin6 = (struct sockaddr_in6 *)to; 921 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 922 &sin6->sin6_addr) != 0) { 923 continue; 924 } 925 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 926 if (local_scope == 0) 927 continue; 928 if (sin6->sin6_scope_id == 0) { 929 if (sa6_recoverscope(sin6) != 0) 930 continue; 931 } 932 } 933 if ((site_scope == 0) && 934 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 935 continue; 936 } 937 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 938 SCTP_IPI_ADDR_RUNLOCK(); 939 return (1); 940 } 941 } 942 break; 943 #endif 944 default: 945 /* TSNH */ 946 break; 947 } 948 } 949 } 950 } else { 951 struct sctp_laddr *laddr; 952 953 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 954 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 955 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 956 continue; 957 } 958 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 959 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 960 /* 961 * We allow pending addresses, where we have 962 * sent an asconf-add to be considered 963 * valid. 964 */ 965 continue; 966 } 967 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 968 continue; 969 } 970 switch (to->sa_family) { 971 #ifdef INET 972 case AF_INET: 973 { 974 struct sockaddr_in *sin, *rsin; 975 976 sin = &laddr->ifa->address.sin; 977 rsin = (struct sockaddr_in *)to; 978 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 979 SCTP_IPI_ADDR_RUNLOCK(); 980 return (1); 981 } 982 break; 983 } 984 #endif 985 #ifdef INET6 986 case AF_INET6: 987 { 988 struct sockaddr_in6 *sin6, *rsin6; 989 990 sin6 = &laddr->ifa->address.sin6; 991 rsin6 = (struct sockaddr_in6 *)to; 992 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 993 SCTP_IPI_ADDR_RUNLOCK(); 994 return (1); 995 } 996 break; 997 } 998 999 #endif 1000 default: 1001 /* TSNH */ 1002 break; 1003 } 1004 1005 } 1006 } 1007 SCTP_IPI_ADDR_RUNLOCK(); 1008 return (0); 1009 } 1010 1011 1012 static struct sctp_tcb * 1013 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1014 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1015 { 1016 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1017 /* 1018 * If we support the TCP model, then we must now dig through to see 1019 * if we can find our endpoint in the list of tcp ep's. 1020 */ 1021 uint16_t lport, rport; 1022 struct sctppcbhead *ephead; 1023 struct sctp_inpcb *inp; 1024 struct sctp_laddr *laddr; 1025 struct sctp_tcb *stcb; 1026 struct sctp_nets *net; 1027 1028 if ((to == NULL) || (from == NULL)) { 1029 return (NULL); 1030 } 1031 1032 switch (to->sa_family) { 1033 #ifdef INET 1034 case AF_INET: 1035 if (from->sa_family == AF_INET) { 1036 lport = ((struct sockaddr_in *)to)->sin_port; 1037 rport = ((struct sockaddr_in *)from)->sin_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042 #endif 1043 #ifdef INET6 1044 case AF_INET6: 1045 if (from->sa_family == AF_INET6) { 1046 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1047 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1048 } else { 1049 return (NULL); 1050 } 1051 break; 1052 #endif 1053 default: 1054 return (NULL); 1055 } 1056 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1057 /* 1058 * Ok now for each of the guys in this bucket we must look and see: 1059 * - Does the remote port match. - Does there single association's 1060 * addresses match this address (to). If so we update p_ep to point 1061 * to this ep and return the tcb from it. 1062 */ 1063 LIST_FOREACH(inp, ephead, sctp_hash) { 1064 SCTP_INP_RLOCK(inp); 1065 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 if (lport != inp->sctp_lport) { 1070 SCTP_INP_RUNLOCK(inp); 1071 continue; 1072 } 1073 switch (to->sa_family) { 1074 #ifdef INET 1075 case AF_INET: 1076 { 1077 struct sockaddr_in *sin; 1078 1079 sin = (struct sockaddr_in *)to; 1080 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1081 &sin->sin_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087 #endif 1088 #ifdef INET6 1089 case AF_INET6: 1090 { 1091 struct sockaddr_in6 *sin6; 1092 1093 sin6 = (struct sockaddr_in6 *)to; 1094 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1095 &sin6->sin6_addr) != 0) { 1096 SCTP_INP_RUNLOCK(inp); 1097 continue; 1098 } 1099 break; 1100 } 1101 #endif 1102 default: 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 if (inp->def_vrf_id != vrf_id) { 1107 SCTP_INP_RUNLOCK(inp); 1108 continue; 1109 } 1110 /* check to see if the ep has one of the addresses */ 1111 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1112 /* We are NOT bound all, so look further */ 1113 int match = 0; 1114 1115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1116 1117 if (laddr->ifa == NULL) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1119 continue; 1120 } 1121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1122 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1123 continue; 1124 } 1125 if (laddr->ifa->address.sa.sa_family == 1126 to->sa_family) { 1127 /* see if it matches */ 1128 #ifdef INET 1129 if (from->sa_family == AF_INET) { 1130 struct sockaddr_in *intf_addr, 1131 *sin; 1132 1133 intf_addr = &laddr->ifa->address.sin; 1134 sin = (struct sockaddr_in *)to; 1135 if (sin->sin_addr.s_addr == 1136 intf_addr->sin_addr.s_addr) { 1137 match = 1; 1138 break; 1139 } 1140 } 1141 #endif 1142 #ifdef INET6 1143 if (from->sa_family == AF_INET6) { 1144 struct sockaddr_in6 *intf_addr6; 1145 struct sockaddr_in6 *sin6; 1146 1147 sin6 = (struct sockaddr_in6 *) 1148 to; 1149 intf_addr6 = &laddr->ifa->address.sin6; 1150 1151 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1152 intf_addr6)) { 1153 match = 1; 1154 break; 1155 } 1156 } 1157 #endif 1158 } 1159 } 1160 if (match == 0) { 1161 /* This endpoint does not have this address */ 1162 SCTP_INP_RUNLOCK(inp); 1163 continue; 1164 } 1165 } 1166 /* 1167 * Ok if we hit here the ep has the address, does it hold 1168 * the tcb? 1169 */ 1170 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1171 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1172 if (stcb == NULL) { 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 SCTP_TCB_LOCK(stcb); 1177 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1178 SCTP_TCB_UNLOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 continue; 1181 } 1182 if (stcb->rport != rport) { 1183 /* remote port does not match. */ 1184 SCTP_TCB_UNLOCK(stcb); 1185 SCTP_INP_RUNLOCK(inp); 1186 continue; 1187 } 1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1189 SCTP_TCB_UNLOCK(stcb); 1190 SCTP_INP_RUNLOCK(inp); 1191 continue; 1192 } 1193 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 continue; 1197 } 1198 /* Does this TCB have a matching address? */ 1199 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1200 1201 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1202 /* not the same family, can't be a match */ 1203 continue; 1204 } 1205 switch (from->sa_family) { 1206 #ifdef INET 1207 case AF_INET: 1208 { 1209 struct sockaddr_in *sin, *rsin; 1210 1211 sin = (struct sockaddr_in *)&net->ro._l_addr; 1212 rsin = (struct sockaddr_in *)from; 1213 if (sin->sin_addr.s_addr == 1214 rsin->sin_addr.s_addr) { 1215 /* found it */ 1216 if (netp != NULL) { 1217 *netp = net; 1218 } 1219 /* 1220 * Update the endpoint 1221 * pointer 1222 */ 1223 *inp_p = inp; 1224 SCTP_INP_RUNLOCK(inp); 1225 return (stcb); 1226 } 1227 break; 1228 } 1229 #endif 1230 #ifdef INET6 1231 case AF_INET6: 1232 { 1233 struct sockaddr_in6 *sin6, *rsin6; 1234 1235 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1236 rsin6 = (struct sockaddr_in6 *)from; 1237 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1238 rsin6)) { 1239 /* found it */ 1240 if (netp != NULL) { 1241 *netp = net; 1242 } 1243 /* 1244 * Update the endpoint 1245 * pointer 1246 */ 1247 *inp_p = inp; 1248 SCTP_INP_RUNLOCK(inp); 1249 return (stcb); 1250 } 1251 break; 1252 } 1253 #endif 1254 default: 1255 /* TSNH */ 1256 break; 1257 } 1258 } 1259 SCTP_TCB_UNLOCK(stcb); 1260 SCTP_INP_RUNLOCK(inp); 1261 } 1262 return (NULL); 1263 } 1264 1265 1266 /* 1267 * rules for use 1268 * 1269 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1270 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1271 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1272 * NULL. 1273 */ 1274 1275 struct sctp_tcb * 1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1277 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1278 { 1279 struct sctpasochead *head; 1280 struct sctp_inpcb *inp; 1281 struct sctp_tcb *stcb = NULL; 1282 struct sctp_nets *net; 1283 uint16_t rport; 1284 1285 inp = *inp_p; 1286 switch (remote->sa_family) { 1287 #ifdef INET 1288 case AF_INET: 1289 rport = (((struct sockaddr_in *)remote)->sin_port); 1290 break; 1291 #endif 1292 #ifdef INET6 1293 case AF_INET6: 1294 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1295 break; 1296 #endif 1297 default: 1298 return (NULL); 1299 } 1300 if (locked_tcb) { 1301 /* 1302 * UN-lock so we can do proper locking here this occurs when 1303 * called from load_addresses_from_init. 1304 */ 1305 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1306 SCTP_TCB_UNLOCK(locked_tcb); 1307 } 1308 SCTP_INP_INFO_RLOCK(); 1309 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1310 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1311 /*- 1312 * Now either this guy is our listener or it's the 1313 * connector. If it is the one that issued the connect, then 1314 * it's only chance is to be the first TCB in the list. If 1315 * it is the acceptor, then do the special_lookup to hash 1316 * and find the real inp. 1317 */ 1318 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1319 /* to is peer addr, from is my addr */ 1320 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1321 netp, inp->def_vrf_id); 1322 if ((stcb != NULL) && (locked_tcb == NULL)) { 1323 /* we have a locked tcb, lower refcount */ 1324 SCTP_INP_DECR_REF(inp); 1325 } 1326 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1327 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1328 SCTP_TCB_LOCK(locked_tcb); 1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1330 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1331 } 1332 SCTP_INP_INFO_RUNLOCK(); 1333 return (stcb); 1334 } else { 1335 SCTP_INP_WLOCK(inp); 1336 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1337 goto null_return; 1338 } 1339 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1340 if (stcb == NULL) { 1341 goto null_return; 1342 } 1343 SCTP_TCB_LOCK(stcb); 1344 1345 if (stcb->rport != rport) { 1346 /* remote port does not match. */ 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1355 SCTP_TCB_UNLOCK(stcb); 1356 goto null_return; 1357 } 1358 /* now look at the list of remote addresses */ 1359 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1360 #ifdef INVARIANTS 1361 if (net == (TAILQ_NEXT(net, sctp_next))) { 1362 panic("Corrupt net list"); 1363 } 1364 #endif 1365 if (net->ro._l_addr.sa.sa_family != 1366 remote->sa_family) { 1367 /* not the same family */ 1368 continue; 1369 } 1370 switch (remote->sa_family) { 1371 #ifdef INET 1372 case AF_INET: 1373 { 1374 struct sockaddr_in *sin, 1375 *rsin; 1376 1377 sin = (struct sockaddr_in *) 1378 &net->ro._l_addr; 1379 rsin = (struct sockaddr_in *)remote; 1380 if (sin->sin_addr.s_addr == 1381 rsin->sin_addr.s_addr) { 1382 /* found it */ 1383 if (netp != NULL) { 1384 *netp = net; 1385 } 1386 if (locked_tcb == NULL) { 1387 SCTP_INP_DECR_REF(inp); 1388 } else if (locked_tcb != stcb) { 1389 SCTP_TCB_LOCK(locked_tcb); 1390 } 1391 if (locked_tcb) { 1392 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1393 } 1394 1395 SCTP_INP_WUNLOCK(inp); 1396 SCTP_INP_INFO_RUNLOCK(); 1397 return (stcb); 1398 } 1399 break; 1400 } 1401 #endif 1402 #ifdef INET6 1403 case AF_INET6: 1404 { 1405 struct sockaddr_in6 *sin6, 1406 *rsin6; 1407 1408 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1409 rsin6 = (struct sockaddr_in6 *)remote; 1410 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1411 rsin6)) { 1412 /* found it */ 1413 if (netp != NULL) { 1414 *netp = net; 1415 } 1416 if (locked_tcb == NULL) { 1417 SCTP_INP_DECR_REF(inp); 1418 } else if (locked_tcb != stcb) { 1419 SCTP_TCB_LOCK(locked_tcb); 1420 } 1421 if (locked_tcb) { 1422 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1423 } 1424 SCTP_INP_WUNLOCK(inp); 1425 SCTP_INP_INFO_RUNLOCK(); 1426 return (stcb); 1427 } 1428 break; 1429 } 1430 #endif 1431 default: 1432 /* TSNH */ 1433 break; 1434 } 1435 } 1436 SCTP_TCB_UNLOCK(stcb); 1437 } 1438 } else { 1439 SCTP_INP_WLOCK(inp); 1440 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1441 goto null_return; 1442 } 1443 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1444 inp->sctp_hashmark)]; 1445 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1446 if (stcb->rport != rport) { 1447 /* remote port does not match */ 1448 continue; 1449 } 1450 SCTP_TCB_LOCK(stcb); 1451 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1452 SCTP_TCB_UNLOCK(stcb); 1453 continue; 1454 } 1455 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1456 SCTP_TCB_UNLOCK(stcb); 1457 continue; 1458 } 1459 /* now look at the list of remote addresses */ 1460 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1461 #ifdef INVARIANTS 1462 if (net == (TAILQ_NEXT(net, sctp_next))) { 1463 panic("Corrupt net list"); 1464 } 1465 #endif 1466 if (net->ro._l_addr.sa.sa_family != 1467 remote->sa_family) { 1468 /* not the same family */ 1469 continue; 1470 } 1471 switch (remote->sa_family) { 1472 #ifdef INET 1473 case AF_INET: 1474 { 1475 struct sockaddr_in *sin, 1476 *rsin; 1477 1478 sin = (struct sockaddr_in *) 1479 &net->ro._l_addr; 1480 rsin = (struct sockaddr_in *)remote; 1481 if (sin->sin_addr.s_addr == 1482 rsin->sin_addr.s_addr) { 1483 /* found it */ 1484 if (netp != NULL) { 1485 *netp = net; 1486 } 1487 if (locked_tcb == NULL) { 1488 SCTP_INP_DECR_REF(inp); 1489 } else if (locked_tcb != stcb) { 1490 SCTP_TCB_LOCK(locked_tcb); 1491 } 1492 if (locked_tcb) { 1493 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1494 } 1495 SCTP_INP_WUNLOCK(inp); 1496 SCTP_INP_INFO_RUNLOCK(); 1497 return (stcb); 1498 } 1499 break; 1500 } 1501 #endif 1502 #ifdef INET6 1503 case AF_INET6: 1504 { 1505 struct sockaddr_in6 *sin6, 1506 *rsin6; 1507 1508 sin6 = (struct sockaddr_in6 *) 1509 &net->ro._l_addr; 1510 rsin6 = (struct sockaddr_in6 *)remote; 1511 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1512 rsin6)) { 1513 /* found it */ 1514 if (netp != NULL) { 1515 *netp = net; 1516 } 1517 if (locked_tcb == NULL) { 1518 SCTP_INP_DECR_REF(inp); 1519 } else if (locked_tcb != stcb) { 1520 SCTP_TCB_LOCK(locked_tcb); 1521 } 1522 if (locked_tcb) { 1523 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1524 } 1525 SCTP_INP_WUNLOCK(inp); 1526 SCTP_INP_INFO_RUNLOCK(); 1527 return (stcb); 1528 } 1529 break; 1530 } 1531 #endif 1532 default: 1533 /* TSNH */ 1534 break; 1535 } 1536 } 1537 SCTP_TCB_UNLOCK(stcb); 1538 } 1539 } 1540 null_return: 1541 /* clean up for returning null */ 1542 if (locked_tcb) { 1543 SCTP_TCB_LOCK(locked_tcb); 1544 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1545 } 1546 SCTP_INP_WUNLOCK(inp); 1547 SCTP_INP_INFO_RUNLOCK(); 1548 /* not found */ 1549 return (NULL); 1550 } 1551 1552 1553 /* 1554 * Find an association for a specific endpoint using the association id given 1555 * out in the COMM_UP notification 1556 */ 1557 struct sctp_tcb * 1558 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1559 { 1560 /* 1561 * Use my the assoc_id to find a endpoint 1562 */ 1563 struct sctpasochead *head; 1564 struct sctp_tcb *stcb; 1565 uint32_t id; 1566 1567 if (inp == NULL) { 1568 SCTP_PRINTF("TSNH ep_associd\n"); 1569 return (NULL); 1570 } 1571 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1572 SCTP_PRINTF("TSNH ep_associd0\n"); 1573 return (NULL); 1574 } 1575 id = (uint32_t)asoc_id; 1576 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1577 if (head == NULL) { 1578 /* invalid id TSNH */ 1579 SCTP_PRINTF("TSNH ep_associd1\n"); 1580 return (NULL); 1581 } 1582 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1583 if (stcb->asoc.assoc_id == id) { 1584 if (inp != stcb->sctp_ep) { 1585 /* 1586 * some other guy has the same id active (id 1587 * collision ??). 1588 */ 1589 SCTP_PRINTF("TSNH ep_associd2\n"); 1590 continue; 1591 } 1592 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1593 continue; 1594 } 1595 if (want_lock) { 1596 SCTP_TCB_LOCK(stcb); 1597 } 1598 return (stcb); 1599 } 1600 } 1601 return (NULL); 1602 } 1603 1604 1605 struct sctp_tcb * 1606 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1607 { 1608 struct sctp_tcb *stcb; 1609 1610 SCTP_INP_RLOCK(inp); 1611 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1612 SCTP_INP_RUNLOCK(inp); 1613 return (stcb); 1614 } 1615 1616 1617 /* 1618 * Endpoint probe expects that the INP_INFO is locked. 1619 */ 1620 static struct sctp_inpcb * 1621 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1622 uint16_t lport, uint32_t vrf_id) 1623 { 1624 struct sctp_inpcb *inp; 1625 struct sctp_laddr *laddr; 1626 #ifdef INET 1627 struct sockaddr_in *sin; 1628 #endif 1629 #ifdef INET6 1630 struct sockaddr_in6 *sin6; 1631 struct sockaddr_in6 *intf_addr6; 1632 #endif 1633 int fnd; 1634 1635 #ifdef INET 1636 sin = NULL; 1637 #endif 1638 #ifdef INET6 1639 sin6 = NULL; 1640 #endif 1641 switch (nam->sa_family) { 1642 #ifdef INET 1643 case AF_INET: 1644 sin = (struct sockaddr_in *)nam; 1645 break; 1646 #endif 1647 #ifdef INET6 1648 case AF_INET6: 1649 sin6 = (struct sockaddr_in6 *)nam; 1650 break; 1651 #endif 1652 default: 1653 /* unsupported family */ 1654 return (NULL); 1655 } 1656 1657 if (head == NULL) 1658 return (NULL); 1659 1660 LIST_FOREACH(inp, head, sctp_hash) { 1661 SCTP_INP_RLOCK(inp); 1662 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1663 SCTP_INP_RUNLOCK(inp); 1664 continue; 1665 } 1666 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1667 (inp->sctp_lport == lport)) { 1668 /* got it */ 1669 switch (nam->sa_family) { 1670 #ifdef INET 1671 case AF_INET: 1672 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1673 SCTP_IPV6_V6ONLY(inp)) { 1674 /* 1675 * IPv4 on a IPv6 socket with ONLY 1676 * IPv6 set 1677 */ 1678 SCTP_INP_RUNLOCK(inp); 1679 continue; 1680 } 1681 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1682 &sin->sin_addr) != 0) { 1683 SCTP_INP_RUNLOCK(inp); 1684 continue; 1685 } 1686 break; 1687 #endif 1688 #ifdef INET6 1689 case AF_INET6: 1690 /* 1691 * A V6 address and the endpoint is NOT 1692 * bound V6 1693 */ 1694 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1695 SCTP_INP_RUNLOCK(inp); 1696 continue; 1697 } 1698 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1699 &sin6->sin6_addr) != 0) { 1700 SCTP_INP_RUNLOCK(inp); 1701 continue; 1702 } 1703 break; 1704 #endif 1705 default: 1706 break; 1707 } 1708 /* does a VRF id match? */ 1709 fnd = 0; 1710 if (inp->def_vrf_id == vrf_id) 1711 fnd = 1; 1712 1713 SCTP_INP_RUNLOCK(inp); 1714 if (!fnd) 1715 continue; 1716 return (inp); 1717 } 1718 SCTP_INP_RUNLOCK(inp); 1719 } 1720 switch (nam->sa_family) { 1721 #ifdef INET 1722 case AF_INET: 1723 if (sin->sin_addr.s_addr == INADDR_ANY) { 1724 /* Can't hunt for one that has no address specified */ 1725 return (NULL); 1726 } 1727 break; 1728 #endif 1729 #ifdef INET6 1730 case AF_INET6: 1731 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1732 /* Can't hunt for one that has no address specified */ 1733 return (NULL); 1734 } 1735 break; 1736 #endif 1737 default: 1738 break; 1739 } 1740 /* 1741 * ok, not bound to all so see if we can find a EP bound to this 1742 * address. 1743 */ 1744 LIST_FOREACH(inp, head, sctp_hash) { 1745 SCTP_INP_RLOCK(inp); 1746 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1747 SCTP_INP_RUNLOCK(inp); 1748 continue; 1749 } 1750 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1751 SCTP_INP_RUNLOCK(inp); 1752 continue; 1753 } 1754 /* 1755 * Ok this could be a likely candidate, look at all of its 1756 * addresses 1757 */ 1758 if (inp->sctp_lport != lport) { 1759 SCTP_INP_RUNLOCK(inp); 1760 continue; 1761 } 1762 /* does a VRF id match? */ 1763 fnd = 0; 1764 if (inp->def_vrf_id == vrf_id) 1765 fnd = 1; 1766 1767 if (!fnd) { 1768 SCTP_INP_RUNLOCK(inp); 1769 continue; 1770 } 1771 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1772 if (laddr->ifa == NULL) { 1773 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1774 __func__); 1775 continue; 1776 } 1777 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1778 (void *)laddr->ifa); 1779 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1780 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1781 continue; 1782 } 1783 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1784 /* possible, see if it matches */ 1785 switch (nam->sa_family) { 1786 #ifdef INET 1787 case AF_INET: 1788 if (sin->sin_addr.s_addr == 1789 laddr->ifa->address.sin.sin_addr.s_addr) { 1790 SCTP_INP_RUNLOCK(inp); 1791 return (inp); 1792 } 1793 break; 1794 #endif 1795 #ifdef INET6 1796 case AF_INET6: 1797 intf_addr6 = &laddr->ifa->address.sin6; 1798 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1799 intf_addr6)) { 1800 SCTP_INP_RUNLOCK(inp); 1801 return (inp); 1802 } 1803 break; 1804 #endif 1805 } 1806 } 1807 } 1808 SCTP_INP_RUNLOCK(inp); 1809 } 1810 return (NULL); 1811 } 1812 1813 1814 static struct sctp_inpcb * 1815 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1816 { 1817 struct sctppcbhead *head; 1818 struct sctp_inpcb *t_inp; 1819 int fnd; 1820 1821 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1822 SCTP_BASE_INFO(hashmark))]; 1823 LIST_FOREACH(t_inp, head, sctp_hash) { 1824 if (t_inp->sctp_lport != lport) { 1825 continue; 1826 } 1827 /* is it in the VRF in question */ 1828 fnd = 0; 1829 if (t_inp->def_vrf_id == vrf_id) 1830 fnd = 1; 1831 if (!fnd) 1832 continue; 1833 1834 /* This one is in use. */ 1835 /* check the v6/v4 binding issue */ 1836 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1837 SCTP_IPV6_V6ONLY(t_inp)) { 1838 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1839 /* collision in V6 space */ 1840 return (t_inp); 1841 } else { 1842 /* inp is BOUND_V4 no conflict */ 1843 continue; 1844 } 1845 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1846 /* t_inp is bound v4 and v6, conflict always */ 1847 return (t_inp); 1848 } else { 1849 /* t_inp is bound only V4 */ 1850 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1851 SCTP_IPV6_V6ONLY(inp)) { 1852 /* no conflict */ 1853 continue; 1854 } 1855 /* else fall through to conflict */ 1856 } 1857 return (t_inp); 1858 } 1859 return (NULL); 1860 } 1861 1862 1863 int 1864 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1865 { 1866 /* For 1-2-1 with port reuse */ 1867 struct sctppcbhead *head; 1868 struct sctp_inpcb *tinp, *ninp; 1869 1870 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1871 /* only works with port reuse on */ 1872 return (-1); 1873 } 1874 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1875 return (0); 1876 } 1877 SCTP_INP_RUNLOCK(inp); 1878 SCTP_INP_INFO_WLOCK(); 1879 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1880 SCTP_BASE_INFO(hashmark))]; 1881 /* Kick out all non-listeners to the TCP hash */ 1882 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1883 if (tinp->sctp_lport != inp->sctp_lport) { 1884 continue; 1885 } 1886 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1887 continue; 1888 } 1889 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1890 continue; 1891 } 1892 if (SCTP_IS_LISTENING(tinp)) { 1893 continue; 1894 } 1895 SCTP_INP_WLOCK(tinp); 1896 LIST_REMOVE(tinp, sctp_hash); 1897 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1898 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1899 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1900 SCTP_INP_WUNLOCK(tinp); 1901 } 1902 SCTP_INP_WLOCK(inp); 1903 /* Pull from where he was */ 1904 LIST_REMOVE(inp, sctp_hash); 1905 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1906 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1907 LIST_INSERT_HEAD(head, inp, sctp_hash); 1908 SCTP_INP_WUNLOCK(inp); 1909 SCTP_INP_RLOCK(inp); 1910 SCTP_INP_INFO_WUNLOCK(); 1911 return (0); 1912 } 1913 1914 1915 struct sctp_inpcb * 1916 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1917 uint32_t vrf_id) 1918 { 1919 /* 1920 * First we check the hash table to see if someone has this port 1921 * bound with just the port. 1922 */ 1923 struct sctp_inpcb *inp; 1924 struct sctppcbhead *head; 1925 int lport; 1926 unsigned int i; 1927 #ifdef INET 1928 struct sockaddr_in *sin; 1929 #endif 1930 #ifdef INET6 1931 struct sockaddr_in6 *sin6; 1932 #endif 1933 1934 switch (nam->sa_family) { 1935 #ifdef INET 1936 case AF_INET: 1937 sin = (struct sockaddr_in *)nam; 1938 lport = sin->sin_port; 1939 break; 1940 #endif 1941 #ifdef INET6 1942 case AF_INET6: 1943 sin6 = (struct sockaddr_in6 *)nam; 1944 lport = sin6->sin6_port; 1945 break; 1946 #endif 1947 default: 1948 return (NULL); 1949 } 1950 /* 1951 * I could cheat here and just cast to one of the types but we will 1952 * do it right. It also provides the check against an Unsupported 1953 * type too. 1954 */ 1955 /* Find the head of the ALLADDR chain */ 1956 if (have_lock == 0) { 1957 SCTP_INP_INFO_RLOCK(); 1958 } 1959 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1960 SCTP_BASE_INFO(hashmark))]; 1961 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1962 1963 /* 1964 * If the TCP model exists it could be that the main listening 1965 * endpoint is gone but there still exists a connected socket for 1966 * this guy. If so we can return the first one that we find. This 1967 * may NOT be the correct one so the caller should be wary on the 1968 * returned INP. Currently the only caller that sets find_tcp_pool 1969 * is in bindx where we are verifying that a user CAN bind the 1970 * address. He either has bound it already, or someone else has, or 1971 * its open to bind, so this is good enough. 1972 */ 1973 if (inp == NULL && find_tcp_pool) { 1974 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1975 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1976 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1977 if (inp) { 1978 break; 1979 } 1980 } 1981 } 1982 if (inp) { 1983 SCTP_INP_INCR_REF(inp); 1984 } 1985 if (have_lock == 0) { 1986 SCTP_INP_INFO_RUNLOCK(); 1987 } 1988 return (inp); 1989 } 1990 1991 1992 /* 1993 * Find an association for an endpoint with the pointer to whom you want to 1994 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1995 * need to change the *to to some other struct like a mbuf... 1996 */ 1997 struct sctp_tcb * 1998 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1999 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2000 uint32_t vrf_id) 2001 { 2002 struct sctp_inpcb *inp = NULL; 2003 struct sctp_tcb *stcb; 2004 2005 SCTP_INP_INFO_RLOCK(); 2006 if (find_tcp_pool) { 2007 if (inp_p != NULL) { 2008 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2009 vrf_id); 2010 } else { 2011 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2012 vrf_id); 2013 } 2014 if (stcb != NULL) { 2015 SCTP_INP_INFO_RUNLOCK(); 2016 return (stcb); 2017 } 2018 } 2019 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2020 if (inp_p != NULL) { 2021 *inp_p = inp; 2022 } 2023 SCTP_INP_INFO_RUNLOCK(); 2024 if (inp == NULL) { 2025 return (NULL); 2026 } 2027 /* 2028 * ok, we have an endpoint, now lets find the assoc for it (if any) 2029 * we now place the source address or from in the to of the find 2030 * endpoint call. Since in reality this chain is used from the 2031 * inbound packet side. 2032 */ 2033 if (inp_p != NULL) { 2034 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2035 NULL); 2036 } else { 2037 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2038 NULL); 2039 } 2040 return (stcb); 2041 } 2042 2043 2044 /* 2045 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2046 * find all addresses that the sender has specified in any address list. Each 2047 * address will be used to lookup the TCB and see if one exits. 2048 */ 2049 static struct sctp_tcb * 2050 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2051 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2052 struct sockaddr *dst) 2053 { 2054 struct sctp_paramhdr *phdr, param_buf; 2055 #if defined(INET) || defined(INET6) 2056 struct sctp_tcb *stcb; 2057 uint16_t ptype; 2058 #endif 2059 uint16_t plen; 2060 #ifdef INET 2061 struct sockaddr_in sin4; 2062 #endif 2063 #ifdef INET6 2064 struct sockaddr_in6 sin6; 2065 #endif 2066 2067 #ifdef INET 2068 memset(&sin4, 0, sizeof(sin4)); 2069 sin4.sin_len = sizeof(sin4); 2070 sin4.sin_family = AF_INET; 2071 sin4.sin_port = sh->src_port; 2072 #endif 2073 #ifdef INET6 2074 memset(&sin6, 0, sizeof(sin6)); 2075 sin6.sin6_len = sizeof(sin6); 2076 sin6.sin6_family = AF_INET6; 2077 sin6.sin6_port = sh->src_port; 2078 #endif 2079 2080 offset += sizeof(struct sctp_init_chunk); 2081 2082 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2083 while (phdr != NULL) { 2084 /* now we must see if we want the parameter */ 2085 #if defined(INET) || defined(INET6) 2086 ptype = ntohs(phdr->param_type); 2087 #endif 2088 plen = ntohs(phdr->param_length); 2089 if (plen == 0) { 2090 break; 2091 } 2092 #ifdef INET 2093 if (ptype == SCTP_IPV4_ADDRESS && 2094 plen == sizeof(struct sctp_ipv4addr_param)) { 2095 /* Get the rest of the address */ 2096 struct sctp_ipv4addr_param ip4_param, *p4; 2097 2098 phdr = sctp_get_next_param(m, offset, 2099 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2100 if (phdr == NULL) { 2101 return (NULL); 2102 } 2103 p4 = (struct sctp_ipv4addr_param *)phdr; 2104 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2105 /* look it up */ 2106 stcb = sctp_findassociation_ep_addr(inp_p, 2107 (struct sockaddr *)&sin4, netp, dst, NULL); 2108 if (stcb != NULL) { 2109 return (stcb); 2110 } 2111 } 2112 #endif 2113 #ifdef INET6 2114 if (ptype == SCTP_IPV6_ADDRESS && 2115 plen == sizeof(struct sctp_ipv6addr_param)) { 2116 /* Get the rest of the address */ 2117 struct sctp_ipv6addr_param ip6_param, *p6; 2118 2119 phdr = sctp_get_next_param(m, offset, 2120 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2121 if (phdr == NULL) { 2122 return (NULL); 2123 } 2124 p6 = (struct sctp_ipv6addr_param *)phdr; 2125 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2126 /* look it up */ 2127 stcb = sctp_findassociation_ep_addr(inp_p, 2128 (struct sockaddr *)&sin6, netp, dst, NULL); 2129 if (stcb != NULL) { 2130 return (stcb); 2131 } 2132 } 2133 #endif 2134 offset += SCTP_SIZE32(plen); 2135 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2136 sizeof(param_buf)); 2137 } 2138 return (NULL); 2139 } 2140 2141 static struct sctp_tcb * 2142 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2143 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2144 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2145 { 2146 /* 2147 * Use my vtag to hash. If we find it we then verify the source addr 2148 * is in the assoc. If all goes well we save a bit on rec of a 2149 * packet. 2150 */ 2151 struct sctpasochead *head; 2152 struct sctp_nets *net; 2153 struct sctp_tcb *stcb; 2154 2155 SCTP_INP_INFO_RLOCK(); 2156 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2157 SCTP_BASE_INFO(hashasocmark))]; 2158 LIST_FOREACH(stcb, head, sctp_asocs) { 2159 SCTP_INP_RLOCK(stcb->sctp_ep); 2160 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2161 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2162 continue; 2163 } 2164 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2165 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2166 continue; 2167 } 2168 SCTP_TCB_LOCK(stcb); 2169 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2170 if (stcb->asoc.my_vtag == vtag) { 2171 /* candidate */ 2172 if (stcb->rport != rport) { 2173 SCTP_TCB_UNLOCK(stcb); 2174 continue; 2175 } 2176 if (stcb->sctp_ep->sctp_lport != lport) { 2177 SCTP_TCB_UNLOCK(stcb); 2178 continue; 2179 } 2180 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2181 SCTP_TCB_UNLOCK(stcb); 2182 continue; 2183 } 2184 /* RRS:Need toaddr check here */ 2185 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2186 /* Endpoint does not own this address */ 2187 SCTP_TCB_UNLOCK(stcb); 2188 continue; 2189 } 2190 if (remote_tag) { 2191 /* 2192 * If we have both vtags that's all we match 2193 * on 2194 */ 2195 if (stcb->asoc.peer_vtag == remote_tag) { 2196 /* 2197 * If both tags match we consider it 2198 * conclusive and check NO 2199 * source/destination addresses 2200 */ 2201 goto conclusive; 2202 } 2203 } 2204 if (skip_src_check) { 2205 conclusive: 2206 if (from) { 2207 *netp = sctp_findnet(stcb, from); 2208 } else { 2209 *netp = NULL; /* unknown */ 2210 } 2211 if (inp_p) 2212 *inp_p = stcb->sctp_ep; 2213 SCTP_INP_INFO_RUNLOCK(); 2214 return (stcb); 2215 } 2216 net = sctp_findnet(stcb, from); 2217 if (net) { 2218 /* yep its him. */ 2219 *netp = net; 2220 SCTP_STAT_INCR(sctps_vtagexpress); 2221 *inp_p = stcb->sctp_ep; 2222 SCTP_INP_INFO_RUNLOCK(); 2223 return (stcb); 2224 } else { 2225 /* 2226 * not him, this should only happen in rare 2227 * cases so I peg it. 2228 */ 2229 SCTP_STAT_INCR(sctps_vtagbogus); 2230 } 2231 } 2232 SCTP_TCB_UNLOCK(stcb); 2233 } 2234 SCTP_INP_INFO_RUNLOCK(); 2235 return (NULL); 2236 } 2237 2238 2239 /* 2240 * Find an association with the pointer to the inbound IP packet. This can be 2241 * a IPv4 or IPv6 packet. 2242 */ 2243 struct sctp_tcb * 2244 sctp_findassociation_addr(struct mbuf *m, int offset, 2245 struct sockaddr *src, struct sockaddr *dst, 2246 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2247 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2248 { 2249 struct sctp_tcb *stcb; 2250 struct sctp_inpcb *inp; 2251 2252 if (sh->v_tag) { 2253 /* we only go down this path if vtag is non-zero */ 2254 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2255 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2256 if (stcb) { 2257 return (stcb); 2258 } 2259 } 2260 2261 if (inp_p) { 2262 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2263 1, vrf_id); 2264 inp = *inp_p; 2265 } else { 2266 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2267 1, vrf_id); 2268 } 2269 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2270 if (stcb == NULL && inp) { 2271 /* Found a EP but not this address */ 2272 if ((ch->chunk_type == SCTP_INITIATION) || 2273 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2274 /*- 2275 * special hook, we do NOT return linp or an 2276 * association that is linked to an existing 2277 * association that is under the TCP pool (i.e. no 2278 * listener exists). The endpoint finding routine 2279 * will always find a listener before examining the 2280 * TCP pool. 2281 */ 2282 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2283 if (inp_p) { 2284 *inp_p = NULL; 2285 } 2286 return (NULL); 2287 } 2288 stcb = sctp_findassociation_special_addr(m, 2289 offset, sh, &inp, netp, dst); 2290 if (inp_p != NULL) { 2291 *inp_p = inp; 2292 } 2293 } 2294 } 2295 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2296 return (stcb); 2297 } 2298 2299 /* 2300 * lookup an association by an ASCONF lookup address. 2301 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2302 */ 2303 struct sctp_tcb * 2304 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2305 struct sockaddr *dst, struct sctphdr *sh, 2306 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2307 { 2308 struct sctp_tcb *stcb; 2309 union sctp_sockstore remote_store; 2310 struct sctp_paramhdr param_buf, *phdr; 2311 int ptype; 2312 int zero_address = 0; 2313 #ifdef INET 2314 struct sockaddr_in *sin; 2315 #endif 2316 #ifdef INET6 2317 struct sockaddr_in6 *sin6; 2318 #endif 2319 2320 memset(&remote_store, 0, sizeof(remote_store)); 2321 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2322 ¶m_buf, sizeof(struct sctp_paramhdr)); 2323 if (phdr == NULL) { 2324 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2325 __func__); 2326 return NULL; 2327 } 2328 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2329 /* get the correlation address */ 2330 switch (ptype) { 2331 #ifdef INET6 2332 case SCTP_IPV6_ADDRESS: 2333 { 2334 /* ipv6 address param */ 2335 struct sctp_ipv6addr_param *p6, p6_buf; 2336 2337 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2338 return NULL; 2339 } 2340 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2341 offset + sizeof(struct sctp_asconf_chunk), 2342 &p6_buf.ph, sizeof(p6_buf)); 2343 if (p6 == NULL) { 2344 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2345 __func__); 2346 return (NULL); 2347 } 2348 sin6 = &remote_store.sin6; 2349 sin6->sin6_family = AF_INET6; 2350 sin6->sin6_len = sizeof(*sin6); 2351 sin6->sin6_port = sh->src_port; 2352 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2353 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2354 zero_address = 1; 2355 break; 2356 } 2357 #endif 2358 #ifdef INET 2359 case SCTP_IPV4_ADDRESS: 2360 { 2361 /* ipv4 address param */ 2362 struct sctp_ipv4addr_param *p4, p4_buf; 2363 2364 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2365 return NULL; 2366 } 2367 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2368 offset + sizeof(struct sctp_asconf_chunk), 2369 &p4_buf.ph, sizeof(p4_buf)); 2370 if (p4 == NULL) { 2371 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2372 __func__); 2373 return (NULL); 2374 } 2375 sin = &remote_store.sin; 2376 sin->sin_family = AF_INET; 2377 sin->sin_len = sizeof(*sin); 2378 sin->sin_port = sh->src_port; 2379 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2380 if (sin->sin_addr.s_addr == INADDR_ANY) 2381 zero_address = 1; 2382 break; 2383 } 2384 #endif 2385 default: 2386 /* invalid address param type */ 2387 return NULL; 2388 } 2389 2390 if (zero_address) { 2391 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2392 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2393 if (stcb != NULL) { 2394 SCTP_INP_DECR_REF(*inp_p); 2395 } 2396 } else { 2397 stcb = sctp_findassociation_ep_addr(inp_p, 2398 &remote_store.sa, netp, 2399 dst, NULL); 2400 } 2401 return (stcb); 2402 } 2403 2404 2405 /* 2406 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2407 * addresses. This way if we don't get a bind we by default pick a ephemeral 2408 * port with all addresses bound. 2409 */ 2410 int 2411 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2412 { 2413 /* 2414 * we get called when a new endpoint starts up. We need to allocate 2415 * the sctp_inpcb structure from the zone and init it. Mark it as 2416 * unbound and find a port that we can use as an ephemeral with 2417 * INADDR_ANY. If the user binds later no problem we can then add in 2418 * the specific addresses. And setup the default parameters for the 2419 * EP. 2420 */ 2421 int i, error; 2422 struct sctp_inpcb *inp; 2423 struct sctp_pcb *m; 2424 struct timeval time; 2425 sctp_sharedkey_t *null_key; 2426 2427 error = 0; 2428 2429 SCTP_INP_INFO_WLOCK(); 2430 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2431 if (inp == NULL) { 2432 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2433 SCTP_INP_INFO_WUNLOCK(); 2434 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2435 return (ENOBUFS); 2436 } 2437 /* zap it */ 2438 memset(inp, 0, sizeof(*inp)); 2439 2440 /* bump generations */ 2441 /* setup socket pointers */ 2442 inp->sctp_socket = so; 2443 inp->ip_inp.inp.inp_socket = so; 2444 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2445 #ifdef INET6 2446 if (INP_SOCKAF(so) == AF_INET6) { 2447 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2448 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2449 } 2450 if (MODULE_GLOBAL(ip6_v6only)) { 2451 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2452 } 2453 } 2454 #endif 2455 inp->sctp_associd_counter = 1; 2456 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2457 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2458 inp->max_cwnd = 0; 2459 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2460 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2461 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2462 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2463 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2464 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2465 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2466 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2467 inp->idata_supported = 0; 2468 2469 inp->fibnum = so->so_fibnum; 2470 /* init the small hash table we use to track asocid <-> tcb */ 2471 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2472 if (inp->sctp_asocidhash == NULL) { 2473 crfree(inp->ip_inp.inp.inp_cred); 2474 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2475 SCTP_INP_INFO_WUNLOCK(); 2476 return (ENOBUFS); 2477 } 2478 SCTP_INCR_EP_COUNT(); 2479 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2480 SCTP_INP_INFO_WUNLOCK(); 2481 2482 so->so_pcb = (caddr_t)inp; 2483 2484 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2485 /* UDP style socket */ 2486 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2487 SCTP_PCB_FLAGS_UNBOUND); 2488 /* Be sure it is NON-BLOCKING IO for UDP */ 2489 /* SCTP_SET_SO_NBIO(so); */ 2490 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2491 /* TCP style socket */ 2492 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2493 SCTP_PCB_FLAGS_UNBOUND); 2494 /* Be sure we have blocking IO by default */ 2495 SOCK_LOCK(so); 2496 SCTP_CLEAR_SO_NBIO(so); 2497 SOCK_UNLOCK(so); 2498 } else { 2499 /* 2500 * unsupported socket type (RAW, etc)- in case we missed it 2501 * in protosw 2502 */ 2503 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2504 so->so_pcb = NULL; 2505 crfree(inp->ip_inp.inp.inp_cred); 2506 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2507 return (EOPNOTSUPP); 2508 } 2509 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2510 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2511 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2512 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2513 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2514 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2515 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2516 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2517 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2518 } 2519 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2520 &inp->sctp_hashmark); 2521 if (inp->sctp_tcbhash == NULL) { 2522 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2523 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2524 so->so_pcb = NULL; 2525 crfree(inp->ip_inp.inp.inp_cred); 2526 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2527 return (ENOBUFS); 2528 } 2529 inp->def_vrf_id = vrf_id; 2530 2531 SCTP_INP_INFO_WLOCK(); 2532 SCTP_INP_LOCK_INIT(inp); 2533 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2534 SCTP_INP_READ_INIT(inp); 2535 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2536 /* lock the new ep */ 2537 SCTP_INP_WLOCK(inp); 2538 2539 /* add it to the info area */ 2540 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2541 SCTP_INP_INFO_WUNLOCK(); 2542 2543 TAILQ_INIT(&inp->read_queue); 2544 LIST_INIT(&inp->sctp_addr_list); 2545 2546 LIST_INIT(&inp->sctp_asoc_list); 2547 2548 #ifdef SCTP_TRACK_FREED_ASOCS 2549 /* TEMP CODE */ 2550 LIST_INIT(&inp->sctp_asoc_free_list); 2551 #endif 2552 /* Init the timer structure for signature change */ 2553 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2554 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2555 2556 /* now init the actual endpoint default data */ 2557 m = &inp->sctp_ep; 2558 2559 /* setup the base timeout information */ 2560 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2561 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2562 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2563 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2564 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2565 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2566 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2567 /* all max/min max are in ms */ 2568 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2569 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2570 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2571 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2572 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2573 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2574 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2575 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2576 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2577 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2578 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2579 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2580 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2581 2582 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2583 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2584 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2585 /* number of streams to pre-open on a association */ 2586 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2587 2588 m->default_mtu = 0; 2589 /* Add adaptation cookie */ 2590 m->adaptation_layer_indicator = 0; 2591 m->adaptation_layer_indicator_provided = 0; 2592 2593 /* seed random number generator */ 2594 m->random_counter = 1; 2595 m->store_at = SCTP_SIGNATURE_SIZE; 2596 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2597 sctp_fill_random_store(m); 2598 2599 /* Minimum cookie size */ 2600 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2601 sizeof(struct sctp_state_cookie); 2602 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2603 2604 /* Setup the initial secret */ 2605 (void)SCTP_GETTIME_TIMEVAL(&time); 2606 m->time_of_secret_change = time.tv_sec; 2607 2608 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2609 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2610 } 2611 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2612 2613 /* How long is a cookie good for ? */ 2614 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2615 /* 2616 * Initialize authentication parameters 2617 */ 2618 m->local_hmacs = sctp_default_supported_hmaclist(); 2619 m->local_auth_chunks = sctp_alloc_chunklist(); 2620 if (inp->asconf_supported) { 2621 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2622 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2623 } 2624 m->default_dscp = 0; 2625 #ifdef INET6 2626 m->default_flowlabel = 0; 2627 #endif 2628 m->port = 0; /* encapsulation disabled by default */ 2629 LIST_INIT(&m->shared_keys); 2630 /* add default NULL key as key id 0 */ 2631 null_key = sctp_alloc_sharedkey(); 2632 sctp_insert_sharedkey(&m->shared_keys, null_key); 2633 SCTP_INP_WUNLOCK(inp); 2634 #ifdef SCTP_LOG_CLOSING 2635 sctp_log_closing(inp, NULL, 12); 2636 #endif 2637 return (error); 2638 } 2639 2640 2641 void 2642 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2643 struct sctp_tcb *stcb) 2644 { 2645 struct sctp_nets *net; 2646 uint16_t lport, rport; 2647 struct sctppcbhead *head; 2648 struct sctp_laddr *laddr, *oladdr; 2649 2650 atomic_add_int(&stcb->asoc.refcnt, 1); 2651 SCTP_TCB_UNLOCK(stcb); 2652 SCTP_INP_INFO_WLOCK(); 2653 SCTP_INP_WLOCK(old_inp); 2654 SCTP_INP_WLOCK(new_inp); 2655 SCTP_TCB_LOCK(stcb); 2656 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2657 2658 new_inp->sctp_ep.time_of_secret_change = 2659 old_inp->sctp_ep.time_of_secret_change; 2660 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2661 sizeof(old_inp->sctp_ep.secret_key)); 2662 new_inp->sctp_ep.current_secret_number = 2663 old_inp->sctp_ep.current_secret_number; 2664 new_inp->sctp_ep.last_secret_number = 2665 old_inp->sctp_ep.last_secret_number; 2666 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2667 2668 /* make it so new data pours into the new socket */ 2669 stcb->sctp_socket = new_inp->sctp_socket; 2670 stcb->sctp_ep = new_inp; 2671 2672 /* Copy the port across */ 2673 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2674 rport = stcb->rport; 2675 /* Pull the tcb from the old association */ 2676 LIST_REMOVE(stcb, sctp_tcbhash); 2677 LIST_REMOVE(stcb, sctp_tcblist); 2678 if (stcb->asoc.in_asocid_hash) { 2679 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2680 } 2681 /* Now insert the new_inp into the TCP connected hash */ 2682 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2683 2684 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2685 /* Its safe to access */ 2686 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2687 2688 /* Now move the tcb into the endpoint list */ 2689 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2690 /* 2691 * Question, do we even need to worry about the ep-hash since we 2692 * only have one connection? Probably not :> so lets get rid of it 2693 * and not suck up any kernel memory in that. 2694 */ 2695 if (stcb->asoc.in_asocid_hash) { 2696 struct sctpasochead *lhd; 2697 2698 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2699 new_inp->hashasocidmark)]; 2700 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2701 } 2702 /* Ok. Let's restart timer. */ 2703 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2704 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2705 stcb, net); 2706 } 2707 2708 SCTP_INP_INFO_WUNLOCK(); 2709 if (new_inp->sctp_tcbhash != NULL) { 2710 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2711 new_inp->sctp_tcbhash = NULL; 2712 } 2713 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2714 /* Subset bound, so copy in the laddr list from the old_inp */ 2715 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2716 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2717 if (laddr == NULL) { 2718 /* 2719 * Gak, what can we do? This assoc is really 2720 * HOSED. We probably should send an abort 2721 * here. 2722 */ 2723 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2724 continue; 2725 } 2726 SCTP_INCR_LADDR_COUNT(); 2727 memset(laddr, 0, sizeof(*laddr)); 2728 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2729 laddr->ifa = oladdr->ifa; 2730 atomic_add_int(&laddr->ifa->refcount, 1); 2731 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2732 sctp_nxt_addr); 2733 new_inp->laddr_count++; 2734 if (oladdr == stcb->asoc.last_used_address) { 2735 stcb->asoc.last_used_address = laddr; 2736 } 2737 } 2738 } 2739 /* 2740 * Now any running timers need to be adjusted since we really don't 2741 * care if they are running or not just blast in the new_inp into 2742 * all of them. 2743 */ 2744 2745 stcb->asoc.dack_timer.ep = (void *)new_inp; 2746 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2747 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2748 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2749 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2750 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2751 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2752 /* now what about the nets? */ 2753 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2754 net->pmtu_timer.ep = (void *)new_inp; 2755 net->hb_timer.ep = (void *)new_inp; 2756 net->rxt_timer.ep = (void *)new_inp; 2757 } 2758 SCTP_INP_WUNLOCK(new_inp); 2759 SCTP_INP_WUNLOCK(old_inp); 2760 } 2761 2762 /* 2763 * insert an laddr entry with the given ifa for the desired list 2764 */ 2765 static int 2766 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2767 { 2768 struct sctp_laddr *laddr; 2769 2770 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2771 if (laddr == NULL) { 2772 /* out of memory? */ 2773 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2774 return (EINVAL); 2775 } 2776 SCTP_INCR_LADDR_COUNT(); 2777 memset(laddr, 0, sizeof(*laddr)); 2778 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2779 laddr->ifa = ifa; 2780 laddr->action = act; 2781 atomic_add_int(&ifa->refcount, 1); 2782 /* insert it */ 2783 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2784 2785 return (0); 2786 } 2787 2788 /* 2789 * Remove an laddr entry from the local address list (on an assoc) 2790 */ 2791 static void 2792 sctp_remove_laddr(struct sctp_laddr *laddr) 2793 { 2794 2795 /* remove from the list */ 2796 LIST_REMOVE(laddr, sctp_nxt_addr); 2797 sctp_free_ifa(laddr->ifa); 2798 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2799 SCTP_DECR_LADDR_COUNT(); 2800 } 2801 2802 2803 2804 /* sctp_ifap is used to bypass normal local address validation checks */ 2805 int 2806 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2807 struct sctp_ifa *sctp_ifap, struct thread *p) 2808 { 2809 /* bind a ep to a socket address */ 2810 struct sctppcbhead *head; 2811 struct sctp_inpcb *inp, *inp_tmp; 2812 struct inpcb *ip_inp; 2813 int port_reuse_active = 0; 2814 int bindall; 2815 uint16_t lport; 2816 int error; 2817 uint32_t vrf_id; 2818 2819 lport = 0; 2820 bindall = 1; 2821 inp = (struct sctp_inpcb *)so->so_pcb; 2822 ip_inp = (struct inpcb *)so->so_pcb; 2823 #ifdef SCTP_DEBUG 2824 if (addr) { 2825 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2826 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2827 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2828 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2829 } 2830 #endif 2831 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2832 /* already did a bind, subsequent binds NOT allowed ! */ 2833 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2834 return (EINVAL); 2835 } 2836 #ifdef INVARIANTS 2837 if (p == NULL) 2838 panic("null proc/thread"); 2839 #endif 2840 if (addr != NULL) { 2841 switch (addr->sa_family) { 2842 #ifdef INET 2843 case AF_INET: 2844 { 2845 struct sockaddr_in *sin; 2846 2847 /* IPV6_V6ONLY socket? */ 2848 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2849 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2850 return (EINVAL); 2851 } 2852 if (addr->sa_len != sizeof(*sin)) { 2853 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2854 return (EINVAL); 2855 } 2856 2857 sin = (struct sockaddr_in *)addr; 2858 lport = sin->sin_port; 2859 /* 2860 * For LOOPBACK the prison_local_ip4() call 2861 * will transmute the ip address to the 2862 * proper value. 2863 */ 2864 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2865 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2866 return (error); 2867 } 2868 if (sin->sin_addr.s_addr != INADDR_ANY) { 2869 bindall = 0; 2870 } 2871 break; 2872 } 2873 #endif 2874 #ifdef INET6 2875 case AF_INET6: 2876 { 2877 /* 2878 * Only for pure IPv6 Address. (No IPv4 2879 * Mapped!) 2880 */ 2881 struct sockaddr_in6 *sin6; 2882 2883 sin6 = (struct sockaddr_in6 *)addr; 2884 2885 if (addr->sa_len != sizeof(*sin6)) { 2886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2887 return (EINVAL); 2888 } 2889 lport = sin6->sin6_port; 2890 /* 2891 * For LOOPBACK the prison_local_ip6() call 2892 * will transmute the ipv6 address to the 2893 * proper value. 2894 */ 2895 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2896 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2897 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2898 return (error); 2899 } 2900 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2901 bindall = 0; 2902 /* KAME hack: embed scopeid */ 2903 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2904 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2905 return (EINVAL); 2906 } 2907 } 2908 /* this must be cleared for ifa_ifwithaddr() */ 2909 sin6->sin6_scope_id = 0; 2910 break; 2911 } 2912 #endif 2913 default: 2914 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2915 return (EAFNOSUPPORT); 2916 } 2917 } 2918 SCTP_INP_INFO_WLOCK(); 2919 SCTP_INP_WLOCK(inp); 2920 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2921 vrf_id = inp->def_vrf_id; 2922 2923 /* increase our count due to the unlock we do */ 2924 SCTP_INP_INCR_REF(inp); 2925 if (lport) { 2926 /* 2927 * Did the caller specify a port? if so we must see if an ep 2928 * already has this one bound. 2929 */ 2930 /* got to be root to get at low ports */ 2931 if (ntohs(lport) < IPPORT_RESERVED) { 2932 if ((p != NULL) && ((error = 2933 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2934 ) != 0)) { 2935 SCTP_INP_DECR_REF(inp); 2936 SCTP_INP_WUNLOCK(inp); 2937 SCTP_INP_INFO_WUNLOCK(); 2938 return (error); 2939 } 2940 } 2941 SCTP_INP_WUNLOCK(inp); 2942 if (bindall) { 2943 vrf_id = inp->def_vrf_id; 2944 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2945 if (inp_tmp != NULL) { 2946 /* 2947 * lock guy returned and lower count note 2948 * that we are not bound so inp_tmp should 2949 * NEVER be inp. And it is this inp 2950 * (inp_tmp) that gets the reference bump, 2951 * so we must lower it. 2952 */ 2953 SCTP_INP_DECR_REF(inp_tmp); 2954 /* unlock info */ 2955 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2956 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2957 /* 2958 * Ok, must be one-2-one and 2959 * allowing port re-use 2960 */ 2961 port_reuse_active = 1; 2962 goto continue_anyway; 2963 } 2964 SCTP_INP_DECR_REF(inp); 2965 SCTP_INP_INFO_WUNLOCK(); 2966 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2967 return (EADDRINUSE); 2968 } 2969 } else { 2970 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2971 if (inp_tmp != NULL) { 2972 /* 2973 * lock guy returned and lower count note 2974 * that we are not bound so inp_tmp should 2975 * NEVER be inp. And it is this inp 2976 * (inp_tmp) that gets the reference bump, 2977 * so we must lower it. 2978 */ 2979 SCTP_INP_DECR_REF(inp_tmp); 2980 /* unlock info */ 2981 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2982 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2983 /* 2984 * Ok, must be one-2-one and 2985 * allowing port re-use 2986 */ 2987 port_reuse_active = 1; 2988 goto continue_anyway; 2989 } 2990 SCTP_INP_DECR_REF(inp); 2991 SCTP_INP_INFO_WUNLOCK(); 2992 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2993 return (EADDRINUSE); 2994 } 2995 } 2996 continue_anyway: 2997 SCTP_INP_WLOCK(inp); 2998 if (bindall) { 2999 /* verify that no lport is not used by a singleton */ 3000 if ((port_reuse_active == 0) && 3001 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3002 /* Sorry someone already has this one bound */ 3003 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3004 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3005 port_reuse_active = 1; 3006 } else { 3007 SCTP_INP_DECR_REF(inp); 3008 SCTP_INP_WUNLOCK(inp); 3009 SCTP_INP_INFO_WUNLOCK(); 3010 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3011 return (EADDRINUSE); 3012 } 3013 } 3014 } 3015 } else { 3016 uint16_t first, last, candidate; 3017 uint16_t count; 3018 int done; 3019 3020 if (ip_inp->inp_flags & INP_HIGHPORT) { 3021 first = MODULE_GLOBAL(ipport_hifirstauto); 3022 last = MODULE_GLOBAL(ipport_hilastauto); 3023 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3024 if (p && (error = 3025 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3026 )) { 3027 SCTP_INP_DECR_REF(inp); 3028 SCTP_INP_WUNLOCK(inp); 3029 SCTP_INP_INFO_WUNLOCK(); 3030 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3031 return (error); 3032 } 3033 first = MODULE_GLOBAL(ipport_lowfirstauto); 3034 last = MODULE_GLOBAL(ipport_lowlastauto); 3035 } else { 3036 first = MODULE_GLOBAL(ipport_firstauto); 3037 last = MODULE_GLOBAL(ipport_lastauto); 3038 } 3039 if (first > last) { 3040 uint16_t temp; 3041 3042 temp = first; 3043 first = last; 3044 last = temp; 3045 } 3046 count = last - first + 1; /* number of candidates */ 3047 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3048 3049 done = 0; 3050 while (!done) { 3051 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3052 done = 1; 3053 } 3054 if (!done) { 3055 if (--count == 0) { 3056 SCTP_INP_DECR_REF(inp); 3057 SCTP_INP_WUNLOCK(inp); 3058 SCTP_INP_INFO_WUNLOCK(); 3059 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3060 return (EADDRINUSE); 3061 } 3062 if (candidate == last) 3063 candidate = first; 3064 else 3065 candidate = candidate + 1; 3066 } 3067 } 3068 lport = htons(candidate); 3069 } 3070 SCTP_INP_DECR_REF(inp); 3071 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3072 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3073 /* 3074 * this really should not happen. The guy did a non-blocking 3075 * bind and then did a close at the same time. 3076 */ 3077 SCTP_INP_WUNLOCK(inp); 3078 SCTP_INP_INFO_WUNLOCK(); 3079 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3080 return (EINVAL); 3081 } 3082 /* ok we look clear to give out this port, so lets setup the binding */ 3083 if (bindall) { 3084 /* binding to all addresses, so just set in the proper flags */ 3085 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3086 /* set the automatic addr changes from kernel flag */ 3087 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3088 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3089 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3090 } else { 3091 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3092 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3093 } 3094 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3095 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3096 } else { 3097 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3098 } 3099 /* 3100 * set the automatic mobility_base from kernel flag (by 3101 * micchie) 3102 */ 3103 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3105 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3106 } else { 3107 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3109 } 3110 /* 3111 * set the automatic mobility_fasthandoff from kernel flag 3112 * (by micchie) 3113 */ 3114 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3115 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3116 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3117 } else { 3118 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3119 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3120 } 3121 } else { 3122 /* 3123 * bind specific, make sure flags is off and add a new 3124 * address structure to the sctp_addr_list inside the ep 3125 * structure. 3126 * 3127 * We will need to allocate one and insert it at the head. 3128 * The socketopt call can just insert new addresses in there 3129 * as well. It will also have to do the embed scope kame 3130 * hack too (before adding). 3131 */ 3132 struct sctp_ifa *ifa; 3133 union sctp_sockstore store; 3134 3135 memset(&store, 0, sizeof(store)); 3136 switch (addr->sa_family) { 3137 #ifdef INET 3138 case AF_INET: 3139 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3140 store.sin.sin_port = 0; 3141 break; 3142 #endif 3143 #ifdef INET6 3144 case AF_INET6: 3145 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3146 store.sin6.sin6_port = 0; 3147 break; 3148 #endif 3149 default: 3150 break; 3151 } 3152 /* 3153 * first find the interface with the bound address need to 3154 * zero out the port to find the address! yuck! can't do 3155 * this earlier since need port for sctp_pcb_findep() 3156 */ 3157 if (sctp_ifap != NULL) { 3158 ifa = sctp_ifap; 3159 } else { 3160 /* 3161 * Note for BSD we hit here always other O/S's will 3162 * pass things in via the sctp_ifap argument 3163 * (Panda). 3164 */ 3165 ifa = sctp_find_ifa_by_addr(&store.sa, 3166 vrf_id, SCTP_ADDR_NOT_LOCKED); 3167 } 3168 if (ifa == NULL) { 3169 /* Can't find an interface with that address */ 3170 SCTP_INP_WUNLOCK(inp); 3171 SCTP_INP_INFO_WUNLOCK(); 3172 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3173 return (EADDRNOTAVAIL); 3174 } 3175 #ifdef INET6 3176 if (addr->sa_family == AF_INET6) { 3177 /* GAK, more FIXME IFA lock? */ 3178 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3179 /* Can't bind a non-existent addr. */ 3180 SCTP_INP_WUNLOCK(inp); 3181 SCTP_INP_INFO_WUNLOCK(); 3182 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3183 return (EINVAL); 3184 } 3185 } 3186 #endif 3187 /* we're not bound all */ 3188 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3189 /* allow bindx() to send ASCONF's for binding changes */ 3190 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3191 /* clear automatic addr changes from kernel flag */ 3192 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3193 3194 /* add this address to the endpoint list */ 3195 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3196 if (error != 0) { 3197 SCTP_INP_WUNLOCK(inp); 3198 SCTP_INP_INFO_WUNLOCK(); 3199 return (error); 3200 } 3201 inp->laddr_count++; 3202 } 3203 /* find the bucket */ 3204 if (port_reuse_active) { 3205 /* Put it into tcp 1-2-1 hash */ 3206 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3207 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3208 } else { 3209 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3210 } 3211 /* put it in the bucket */ 3212 LIST_INSERT_HEAD(head, inp, sctp_hash); 3213 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3214 (void *)head, ntohs(lport), port_reuse_active); 3215 /* set in the port */ 3216 inp->sctp_lport = lport; 3217 3218 /* turn off just the unbound flag */ 3219 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3220 SCTP_INP_WUNLOCK(inp); 3221 SCTP_INP_INFO_WUNLOCK(); 3222 return (0); 3223 } 3224 3225 3226 static void 3227 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3228 { 3229 struct sctp_iterator *it, *nit; 3230 3231 /* 3232 * We enter with the only the ITERATOR_LOCK in place and a write 3233 * lock on the inp_info stuff. 3234 */ 3235 it = sctp_it_ctl.cur_it; 3236 if (it && (it->vn != curvnet)) { 3237 /* Its not looking at our VNET */ 3238 return; 3239 } 3240 if (it && (it->inp == inp)) { 3241 /* 3242 * This is tricky and we hold the iterator lock, but when it 3243 * returns and gets the lock (when we release it) the 3244 * iterator will try to operate on inp. We need to stop that 3245 * from happening. But of course the iterator has a 3246 * reference on the stcb and inp. We can mark it and it will 3247 * stop. 3248 * 3249 * If its a single iterator situation, we set the end 3250 * iterator flag. Otherwise we set the iterator to go to the 3251 * next inp. 3252 * 3253 */ 3254 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3255 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3256 } else { 3257 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3258 } 3259 } 3260 /* 3261 * Now go through and remove any single reference to our inp that 3262 * may be still pending on the list 3263 */ 3264 SCTP_IPI_ITERATOR_WQ_LOCK(); 3265 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3266 if (it->vn != curvnet) { 3267 continue; 3268 } 3269 if (it->inp == inp) { 3270 /* This one points to me is it inp specific? */ 3271 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3272 /* Remove and free this one */ 3273 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3274 it, sctp_nxt_itr); 3275 if (it->function_atend != NULL) { 3276 (*it->function_atend) (it->pointer, it->val); 3277 } 3278 SCTP_FREE(it, SCTP_M_ITER); 3279 } else { 3280 it->inp = LIST_NEXT(it->inp, sctp_list); 3281 if (it->inp) { 3282 SCTP_INP_INCR_REF(it->inp); 3283 } 3284 } 3285 /* 3286 * When its put in the refcnt is incremented so decr 3287 * it 3288 */ 3289 SCTP_INP_DECR_REF(inp); 3290 } 3291 } 3292 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3293 } 3294 3295 /* release sctp_inpcb unbind the port */ 3296 void 3297 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3298 { 3299 /* 3300 * Here we free a endpoint. We must find it (if it is in the Hash 3301 * table) and remove it from there. Then we must also find it in the 3302 * overall list and remove it from there. After all removals are 3303 * complete then any timer has to be stopped. Then start the actual 3304 * freeing. a) Any local lists. b) Any associations. c) The hash of 3305 * all associations. d) finally the ep itself. 3306 */ 3307 struct sctp_tcb *asoc, *nasoc; 3308 struct sctp_laddr *laddr, *nladdr; 3309 struct inpcb *ip_pcb; 3310 struct socket *so; 3311 int being_refed = 0; 3312 struct sctp_queued_to_read *sq, *nsq; 3313 int cnt; 3314 sctp_sharedkey_t *shared_key, *nshared_key; 3315 3316 3317 #ifdef SCTP_LOG_CLOSING 3318 sctp_log_closing(inp, NULL, 0); 3319 #endif 3320 SCTP_ITERATOR_LOCK(); 3321 /* mark any iterators on the list or being processed */ 3322 sctp_iterator_inp_being_freed(inp); 3323 SCTP_ITERATOR_UNLOCK(); 3324 so = inp->sctp_socket; 3325 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3326 /* been here before.. eeks.. get out of here */ 3327 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3328 #ifdef SCTP_LOG_CLOSING 3329 sctp_log_closing(inp, NULL, 1); 3330 #endif 3331 return; 3332 } 3333 SCTP_ASOC_CREATE_LOCK(inp); 3334 SCTP_INP_INFO_WLOCK(); 3335 3336 SCTP_INP_WLOCK(inp); 3337 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3338 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3339 /* socket is gone, so no more wakeups allowed */ 3340 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3341 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3342 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3343 3344 } 3345 /* First time through we have the socket lock, after that no more. */ 3346 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3347 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3348 3349 if (inp->control) { 3350 sctp_m_freem(inp->control); 3351 inp->control = NULL; 3352 } 3353 if (inp->pkt) { 3354 sctp_m_freem(inp->pkt); 3355 inp->pkt = NULL; 3356 } 3357 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3358 * here but I will be nice :> (i.e. 3359 * ip_pcb = ep;) */ 3360 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3361 int cnt_in_sd; 3362 3363 cnt_in_sd = 0; 3364 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3365 SCTP_TCB_LOCK(asoc); 3366 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3367 /* Skip guys being freed */ 3368 cnt_in_sd++; 3369 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3370 /* 3371 * Special case - we did not start a 3372 * kill timer on the asoc due to it 3373 * was not closed. So go ahead and 3374 * start it now. 3375 */ 3376 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3377 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3378 } 3379 SCTP_TCB_UNLOCK(asoc); 3380 continue; 3381 } 3382 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3383 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3384 (asoc->asoc.total_output_queue_size == 0)) { 3385 /* 3386 * If we have data in queue, we don't want 3387 * to just free since the app may have done, 3388 * send()/close or connect/send/close. And 3389 * it wants the data to get across first. 3390 */ 3391 /* Just abandon things in the front states */ 3392 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3393 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3394 cnt_in_sd++; 3395 } 3396 continue; 3397 } 3398 /* Disconnect the socket please */ 3399 asoc->sctp_socket = NULL; 3400 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3401 if ((asoc->asoc.size_on_reasm_queue > 0) || 3402 (asoc->asoc.control_pdapi) || 3403 (asoc->asoc.size_on_all_streams > 0) || 3404 (so && (so->so_rcv.sb_cc > 0))) { 3405 /* Left with Data unread */ 3406 struct mbuf *op_err; 3407 3408 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3409 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3410 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3411 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3412 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3413 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3414 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3415 } 3416 if (sctp_free_assoc(inp, asoc, 3417 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3418 cnt_in_sd++; 3419 } 3420 continue; 3421 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3422 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3423 (asoc->asoc.stream_queue_cnt == 0)) { 3424 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3425 goto abort_anyway; 3426 } 3427 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3428 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3429 struct sctp_nets *netp; 3430 3431 /* 3432 * there is nothing queued to send, 3433 * so I send shutdown 3434 */ 3435 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3436 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3437 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3438 } 3439 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3440 sctp_stop_timers_for_shutdown(asoc); 3441 if (asoc->asoc.alternate) { 3442 netp = asoc->asoc.alternate; 3443 } else { 3444 netp = asoc->asoc.primary_destination; 3445 } 3446 sctp_send_shutdown(asoc, netp); 3447 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3448 netp); 3449 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3450 asoc->asoc.primary_destination); 3451 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3452 } 3453 } else { 3454 /* mark into shutdown pending */ 3455 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3456 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3457 asoc->asoc.primary_destination); 3458 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3459 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3460 } 3461 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3462 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3463 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3464 struct mbuf *op_err; 3465 3466 abort_anyway: 3467 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3468 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3469 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3470 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3471 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3472 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3473 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3474 } 3475 if (sctp_free_assoc(inp, asoc, 3476 SCTP_PCBFREE_NOFORCE, 3477 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3478 cnt_in_sd++; 3479 } 3480 continue; 3481 } else { 3482 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3483 } 3484 } 3485 cnt_in_sd++; 3486 SCTP_TCB_UNLOCK(asoc); 3487 } 3488 /* now is there some left in our SHUTDOWN state? */ 3489 if (cnt_in_sd) { 3490 #ifdef SCTP_LOG_CLOSING 3491 sctp_log_closing(inp, NULL, 2); 3492 #endif 3493 inp->sctp_socket = NULL; 3494 SCTP_INP_WUNLOCK(inp); 3495 SCTP_ASOC_CREATE_UNLOCK(inp); 3496 SCTP_INP_INFO_WUNLOCK(); 3497 return; 3498 } 3499 } 3500 inp->sctp_socket = NULL; 3501 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3502 SCTP_PCB_FLAGS_UNBOUND) { 3503 /* 3504 * ok, this guy has been bound. It's port is somewhere in 3505 * the SCTP_BASE_INFO(hash table). Remove it! 3506 */ 3507 LIST_REMOVE(inp, sctp_hash); 3508 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3509 } 3510 3511 /* 3512 * If there is a timer running to kill us, forget it, since it may 3513 * have a contest on the INP lock.. which would cause us to die ... 3514 */ 3515 cnt = 0; 3516 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3517 SCTP_TCB_LOCK(asoc); 3518 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3519 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3520 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3521 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3522 } 3523 cnt++; 3524 SCTP_TCB_UNLOCK(asoc); 3525 continue; 3526 } 3527 /* Free associations that are NOT killing us */ 3528 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3529 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3530 struct mbuf *op_err; 3531 3532 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3533 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3534 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3535 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3536 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3537 cnt++; 3538 SCTP_TCB_UNLOCK(asoc); 3539 continue; 3540 } 3541 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3542 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3543 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3544 } 3545 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3546 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3547 cnt++; 3548 } 3549 } 3550 if (cnt) { 3551 /* Ok we have someone out there that will kill us */ 3552 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3553 #ifdef SCTP_LOG_CLOSING 3554 sctp_log_closing(inp, NULL, 3); 3555 #endif 3556 SCTP_INP_WUNLOCK(inp); 3557 SCTP_ASOC_CREATE_UNLOCK(inp); 3558 SCTP_INP_INFO_WUNLOCK(); 3559 return; 3560 } 3561 if (SCTP_INP_LOCK_CONTENDED(inp)) 3562 being_refed++; 3563 if (SCTP_INP_READ_CONTENDED(inp)) 3564 being_refed++; 3565 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3566 being_refed++; 3567 3568 if ((inp->refcount) || 3569 (being_refed) || 3570 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3571 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3572 #ifdef SCTP_LOG_CLOSING 3573 sctp_log_closing(inp, NULL, 4); 3574 #endif 3575 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3576 SCTP_INP_WUNLOCK(inp); 3577 SCTP_ASOC_CREATE_UNLOCK(inp); 3578 SCTP_INP_INFO_WUNLOCK(); 3579 return; 3580 } 3581 inp->sctp_ep.signature_change.type = 0; 3582 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3583 /* 3584 * Remove it from the list .. last thing we need a lock for. 3585 */ 3586 LIST_REMOVE(inp, sctp_list); 3587 SCTP_INP_WUNLOCK(inp); 3588 SCTP_ASOC_CREATE_UNLOCK(inp); 3589 SCTP_INP_INFO_WUNLOCK(); 3590 /* 3591 * Now we release all locks. Since this INP cannot be found anymore 3592 * except possibly by the kill timer that might be running. We call 3593 * the drain function here. It should hit the case were it sees the 3594 * ACTIVE flag cleared and exit out freeing us to proceed and 3595 * destroy everything. 3596 */ 3597 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3598 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3599 } else { 3600 /* Probably un-needed */ 3601 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3602 } 3603 3604 #ifdef SCTP_LOG_CLOSING 3605 sctp_log_closing(inp, NULL, 5); 3606 #endif 3607 3608 3609 if ((inp->sctp_asocidhash) != NULL) { 3610 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3611 inp->sctp_asocidhash = NULL; 3612 } 3613 /* sa_ignore FREED_MEMORY */ 3614 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3615 /* Its only abandoned if it had data left */ 3616 if (sq->length) 3617 SCTP_STAT_INCR(sctps_left_abandon); 3618 3619 TAILQ_REMOVE(&inp->read_queue, sq, next); 3620 sctp_free_remote_addr(sq->whoFrom); 3621 if (so) 3622 so->so_rcv.sb_cc -= sq->length; 3623 if (sq->data) { 3624 sctp_m_freem(sq->data); 3625 sq->data = NULL; 3626 } 3627 /* 3628 * no need to free the net count, since at this point all 3629 * assoc's are gone. 3630 */ 3631 sctp_free_a_readq(NULL, sq); 3632 } 3633 /* Now the sctp_pcb things */ 3634 /* 3635 * free each asoc if it is not already closed/free. we can't use the 3636 * macro here since le_next will get freed as part of the 3637 * sctp_free_assoc() call. 3638 */ 3639 if (ip_pcb->inp_options) { 3640 (void)sctp_m_free(ip_pcb->inp_options); 3641 ip_pcb->inp_options = 0; 3642 } 3643 3644 3645 #ifdef INET6 3646 if (ip_pcb->inp_vflag & INP_IPV6) { 3647 struct in6pcb *in6p; 3648 3649 in6p = (struct in6pcb *)inp; 3650 ip6_freepcbopts(in6p->in6p_outputopts); 3651 } 3652 #endif /* INET6 */ 3653 ip_pcb->inp_vflag = 0; 3654 /* free up authentication fields */ 3655 if (inp->sctp_ep.local_auth_chunks != NULL) 3656 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3657 if (inp->sctp_ep.local_hmacs != NULL) 3658 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3659 3660 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3661 LIST_REMOVE(shared_key, next); 3662 sctp_free_sharedkey(shared_key); 3663 /* sa_ignore FREED_MEMORY */ 3664 } 3665 3666 /* 3667 * if we have an address list the following will free the list of 3668 * ifaddr's that are set into this ep. Again macro limitations here, 3669 * since the LIST_FOREACH could be a bad idea. 3670 */ 3671 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3672 sctp_remove_laddr(laddr); 3673 } 3674 3675 #ifdef SCTP_TRACK_FREED_ASOCS 3676 /* TEMP CODE */ 3677 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3678 LIST_REMOVE(asoc, sctp_tcblist); 3679 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3680 SCTP_DECR_ASOC_COUNT(); 3681 } 3682 /* *** END TEMP CODE *** */ 3683 #endif 3684 /* Now lets see about freeing the EP hash table. */ 3685 if (inp->sctp_tcbhash != NULL) { 3686 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3687 inp->sctp_tcbhash = NULL; 3688 } 3689 /* Now we must put the ep memory back into the zone pool */ 3690 crfree(inp->ip_inp.inp.inp_cred); 3691 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3692 SCTP_INP_LOCK_DESTROY(inp); 3693 SCTP_INP_READ_DESTROY(inp); 3694 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3695 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3696 SCTP_DECR_EP_COUNT(); 3697 } 3698 3699 3700 struct sctp_nets * 3701 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3702 { 3703 struct sctp_nets *net; 3704 3705 /* locate the address */ 3706 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3707 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3708 return (net); 3709 } 3710 return (NULL); 3711 } 3712 3713 3714 int 3715 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3716 { 3717 struct sctp_ifa *sctp_ifa; 3718 3719 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3720 if (sctp_ifa) { 3721 return (1); 3722 } else { 3723 return (0); 3724 } 3725 } 3726 3727 /* 3728 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3729 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3730 * stats of stuff. 3731 */ 3732 int 3733 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3734 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3735 { 3736 /* 3737 * The following is redundant to the same lines in the 3738 * sctp_aloc_assoc() but is needed since others call the add address 3739 * function 3740 */ 3741 struct sctp_nets *net, *netfirst; 3742 int addr_inscope; 3743 3744 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3745 from); 3746 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3747 3748 netfirst = sctp_findnet(stcb, newaddr); 3749 if (netfirst) { 3750 /* 3751 * Lie and return ok, we don't want to make the association 3752 * go away for this behavior. It will happen in the TCP 3753 * model in a connected socket. It does not reach the hash 3754 * table until after the association is built so it can't be 3755 * found. Mark as reachable, since the initial creation will 3756 * have been cleared and the NOT_IN_ASSOC flag will have 3757 * been added... and we don't want to end up removing it 3758 * back out. 3759 */ 3760 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3761 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3762 SCTP_ADDR_UNCONFIRMED); 3763 } else { 3764 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3765 } 3766 3767 return (0); 3768 } 3769 addr_inscope = 1; 3770 switch (newaddr->sa_family) { 3771 #ifdef INET 3772 case AF_INET: 3773 { 3774 struct sockaddr_in *sin; 3775 3776 sin = (struct sockaddr_in *)newaddr; 3777 if (sin->sin_addr.s_addr == 0) { 3778 /* Invalid address */ 3779 return (-1); 3780 } 3781 /* zero out the zero area */ 3782 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3783 3784 /* assure len is set */ 3785 sin->sin_len = sizeof(struct sockaddr_in); 3786 if (set_scope) { 3787 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3788 stcb->asoc.scope.ipv4_local_scope = 1; 3789 } 3790 } else { 3791 /* Validate the address is in scope */ 3792 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3793 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3794 addr_inscope = 0; 3795 } 3796 } 3797 break; 3798 } 3799 #endif 3800 #ifdef INET6 3801 case AF_INET6: 3802 { 3803 struct sockaddr_in6 *sin6; 3804 3805 sin6 = (struct sockaddr_in6 *)newaddr; 3806 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3807 /* Invalid address */ 3808 return (-1); 3809 } 3810 /* assure len is set */ 3811 sin6->sin6_len = sizeof(struct sockaddr_in6); 3812 if (set_scope) { 3813 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3814 stcb->asoc.scope.loopback_scope = 1; 3815 stcb->asoc.scope.local_scope = 0; 3816 stcb->asoc.scope.ipv4_local_scope = 1; 3817 stcb->asoc.scope.site_scope = 1; 3818 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3819 /* 3820 * If the new destination is a 3821 * LINK_LOCAL we must have common 3822 * site scope. Don't set the local 3823 * scope since we may not share all 3824 * links, only loopback can do this. 3825 * Links on the local network would 3826 * also be on our private network 3827 * for v4 too. 3828 */ 3829 stcb->asoc.scope.ipv4_local_scope = 1; 3830 stcb->asoc.scope.site_scope = 1; 3831 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3832 /* 3833 * If the new destination is 3834 * SITE_LOCAL then we must have site 3835 * scope in common. 3836 */ 3837 stcb->asoc.scope.site_scope = 1; 3838 } 3839 } else { 3840 /* Validate the address is in scope */ 3841 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3842 (stcb->asoc.scope.loopback_scope == 0)) { 3843 addr_inscope = 0; 3844 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3845 (stcb->asoc.scope.local_scope == 0)) { 3846 addr_inscope = 0; 3847 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3848 (stcb->asoc.scope.site_scope == 0)) { 3849 addr_inscope = 0; 3850 } 3851 } 3852 break; 3853 } 3854 #endif 3855 default: 3856 /* not supported family type */ 3857 return (-1); 3858 } 3859 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3860 if (net == NULL) { 3861 return (-1); 3862 } 3863 SCTP_INCR_RADDR_COUNT(); 3864 memset(net, 0, sizeof(struct sctp_nets)); 3865 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3866 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3867 switch (newaddr->sa_family) { 3868 #ifdef INET 3869 case AF_INET: 3870 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3871 break; 3872 #endif 3873 #ifdef INET6 3874 case AF_INET6: 3875 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3876 break; 3877 #endif 3878 default: 3879 break; 3880 } 3881 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3882 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3883 stcb->asoc.scope.loopback_scope = 1; 3884 stcb->asoc.scope.ipv4_local_scope = 1; 3885 stcb->asoc.scope.local_scope = 0; 3886 stcb->asoc.scope.site_scope = 1; 3887 addr_inscope = 1; 3888 } 3889 net->failure_threshold = stcb->asoc.def_net_failure; 3890 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3891 if (addr_inscope == 0) { 3892 net->dest_state = (SCTP_ADDR_REACHABLE | 3893 SCTP_ADDR_OUT_OF_SCOPE); 3894 } else { 3895 if (from == SCTP_ADDR_IS_CONFIRMED) 3896 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3897 net->dest_state = SCTP_ADDR_REACHABLE; 3898 else 3899 net->dest_state = SCTP_ADDR_REACHABLE | 3900 SCTP_ADDR_UNCONFIRMED; 3901 } 3902 /* 3903 * We set this to 0, the timer code knows that this means its an 3904 * initial value 3905 */ 3906 net->rto_needed = 1; 3907 net->RTO = 0; 3908 net->RTO_measured = 0; 3909 stcb->asoc.numnets++; 3910 net->ref_count = 1; 3911 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3912 net->port = port; 3913 net->dscp = stcb->asoc.default_dscp; 3914 #ifdef INET6 3915 net->flowlabel = stcb->asoc.default_flowlabel; 3916 #endif 3917 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3918 net->dest_state |= SCTP_ADDR_NOHB; 3919 } else { 3920 net->dest_state &= ~SCTP_ADDR_NOHB; 3921 } 3922 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3923 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3924 } else { 3925 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3926 } 3927 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3928 /* Init the timer structure */ 3929 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3930 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3931 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3932 3933 /* Now generate a route for this guy */ 3934 #ifdef INET6 3935 /* KAME hack: embed scopeid */ 3936 if (newaddr->sa_family == AF_INET6) { 3937 struct sockaddr_in6 *sin6; 3938 3939 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3940 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3941 sin6->sin6_scope_id = 0; 3942 } 3943 #endif 3944 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3945 stcb->asoc.vrf_id, 3946 stcb->sctp_ep->fibnum); 3947 3948 net->src_addr_selected = 0; 3949 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3950 /* Get source address */ 3951 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3952 stcb, 3953 (sctp_route_t *)&net->ro, 3954 net, 3955 0, 3956 stcb->asoc.vrf_id); 3957 if (stcb->asoc.default_mtu > 0) { 3958 net->mtu = stcb->asoc.default_mtu; 3959 switch (net->ro._l_addr.sa.sa_family) { 3960 #ifdef INET 3961 case AF_INET: 3962 net->mtu += SCTP_MIN_V4_OVERHEAD; 3963 break; 3964 #endif 3965 #ifdef INET6 3966 case AF_INET6: 3967 net->mtu += SCTP_MIN_OVERHEAD; 3968 break; 3969 #endif 3970 default: 3971 break; 3972 } 3973 #if defined(INET) || defined(INET6) 3974 if (net->port) { 3975 net->mtu += (uint32_t)sizeof(struct udphdr); 3976 } 3977 #endif 3978 } else if (net->ro._s_addr != NULL) { 3979 uint32_t imtu, rmtu, hcmtu; 3980 3981 net->src_addr_selected = 1; 3982 /* Now get the interface MTU */ 3983 if (net->ro._s_addr->ifn_p != NULL) { 3984 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3985 } else { 3986 imtu = 0; 3987 } 3988 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3989 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3990 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3991 if (rmtu == 0) { 3992 /* 3993 * Start things off to match mtu of 3994 * interface please. 3995 */ 3996 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3997 net->ro.ro_rt, net->mtu); 3998 } 3999 } 4000 } 4001 if (net->mtu == 0) { 4002 if (stcb->asoc.default_mtu > 0) { 4003 net->mtu = stcb->asoc.default_mtu; 4004 switch (net->ro._l_addr.sa.sa_family) { 4005 #ifdef INET 4006 case AF_INET: 4007 net->mtu += SCTP_MIN_V4_OVERHEAD; 4008 break; 4009 #endif 4010 #ifdef INET6 4011 case AF_INET6: 4012 net->mtu += SCTP_MIN_OVERHEAD; 4013 break; 4014 #endif 4015 default: 4016 break; 4017 } 4018 #if defined(INET) || defined(INET6) 4019 if (net->port) { 4020 net->mtu += (uint32_t)sizeof(struct udphdr); 4021 } 4022 #endif 4023 } else { 4024 switch (newaddr->sa_family) { 4025 #ifdef INET 4026 case AF_INET: 4027 net->mtu = SCTP_DEFAULT_MTU; 4028 break; 4029 #endif 4030 #ifdef INET6 4031 case AF_INET6: 4032 net->mtu = 1280; 4033 break; 4034 #endif 4035 default: 4036 break; 4037 } 4038 } 4039 } 4040 #if defined(INET) || defined(INET6) 4041 if (net->port) { 4042 net->mtu -= (uint32_t)sizeof(struct udphdr); 4043 } 4044 #endif 4045 if (from == SCTP_ALLOC_ASOC) { 4046 stcb->asoc.smallest_mtu = net->mtu; 4047 } 4048 if (stcb->asoc.smallest_mtu > net->mtu) { 4049 sctp_pathmtu_adjustment(stcb, net->mtu); 4050 } 4051 #ifdef INET6 4052 if (newaddr->sa_family == AF_INET6) { 4053 struct sockaddr_in6 *sin6; 4054 4055 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4056 (void)sa6_recoverscope(sin6); 4057 } 4058 #endif 4059 4060 /* JRS - Use the congestion control given in the CC module */ 4061 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4062 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4063 4064 /* 4065 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4066 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4067 */ 4068 net->find_pseudo_cumack = 1; 4069 net->find_rtx_pseudo_cumack = 1; 4070 /* Choose an initial flowid. */ 4071 net->flowid = stcb->asoc.my_vtag ^ 4072 ntohs(stcb->rport) ^ 4073 ntohs(stcb->sctp_ep->sctp_lport); 4074 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4075 if (netp) { 4076 *netp = net; 4077 } 4078 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4079 if (net->ro.ro_rt == NULL) { 4080 /* Since we have no route put it at the back */ 4081 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4082 } else if (netfirst == NULL) { 4083 /* We are the first one in the pool. */ 4084 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4085 } else if (netfirst->ro.ro_rt == NULL) { 4086 /* 4087 * First one has NO route. Place this one ahead of the first 4088 * one. 4089 */ 4090 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4091 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4092 /* 4093 * This one has a different interface than the one at the 4094 * top of the list. Place it ahead. 4095 */ 4096 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4097 } else { 4098 /* 4099 * Ok we have the same interface as the first one. Move 4100 * forward until we find either a) one with a NULL route... 4101 * insert ahead of that b) one with a different ifp.. insert 4102 * after that. c) end of the list.. insert at the tail. 4103 */ 4104 struct sctp_nets *netlook; 4105 4106 do { 4107 netlook = TAILQ_NEXT(netfirst, sctp_next); 4108 if (netlook == NULL) { 4109 /* End of the list */ 4110 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4111 break; 4112 } else if (netlook->ro.ro_rt == NULL) { 4113 /* next one has NO route */ 4114 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4115 break; 4116 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4117 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4118 net, sctp_next); 4119 break; 4120 } 4121 /* Shift forward */ 4122 netfirst = netlook; 4123 } while (netlook != NULL); 4124 } 4125 4126 /* got to have a primary set */ 4127 if (stcb->asoc.primary_destination == 0) { 4128 stcb->asoc.primary_destination = net; 4129 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4130 (net->ro.ro_rt) && 4131 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4132 /* No route to current primary adopt new primary */ 4133 stcb->asoc.primary_destination = net; 4134 } 4135 /* Validate primary is first */ 4136 net = TAILQ_FIRST(&stcb->asoc.nets); 4137 if ((net != stcb->asoc.primary_destination) && 4138 (stcb->asoc.primary_destination)) { 4139 /* 4140 * first one on the list is NOT the primary sctp_cmpaddr() 4141 * is much more efficient if the primary is the first on the 4142 * list, make it so. 4143 */ 4144 TAILQ_REMOVE(&stcb->asoc.nets, 4145 stcb->asoc.primary_destination, sctp_next); 4146 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4147 stcb->asoc.primary_destination, sctp_next); 4148 } 4149 return (0); 4150 } 4151 4152 4153 static uint32_t 4154 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4155 { 4156 uint32_t id; 4157 struct sctpasochead *head; 4158 struct sctp_tcb *lstcb; 4159 4160 try_again: 4161 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4162 /* TSNH */ 4163 return (0); 4164 } 4165 /* 4166 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4167 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4168 */ 4169 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4170 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4171 } 4172 id = inp->sctp_associd_counter; 4173 inp->sctp_associd_counter++; 4174 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4175 if (lstcb) { 4176 goto try_again; 4177 } 4178 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4179 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4180 stcb->asoc.in_asocid_hash = 1; 4181 return (id); 4182 } 4183 4184 /* 4185 * allocate an association and add it to the endpoint. The caller must be 4186 * careful to add all additional addresses once they are know right away or 4187 * else the assoc will be may experience a blackout scenario. 4188 */ 4189 struct sctp_tcb * 4190 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4191 int *error, uint32_t override_tag, uint32_t vrf_id, 4192 uint16_t o_streams, uint16_t port, 4193 struct thread *p 4194 ) 4195 { 4196 /* note the p argument is only valid in unbound sockets */ 4197 4198 struct sctp_tcb *stcb; 4199 struct sctp_association *asoc; 4200 struct sctpasochead *head; 4201 uint16_t rport; 4202 int err; 4203 4204 /* 4205 * Assumption made here: Caller has done a 4206 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4207 * address does not exist already. 4208 */ 4209 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4210 /* Hit max assoc, sorry no more */ 4211 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4212 *error = ENOBUFS; 4213 return (NULL); 4214 } 4215 if (firstaddr == NULL) { 4216 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4217 *error = EINVAL; 4218 return (NULL); 4219 } 4220 SCTP_INP_RLOCK(inp); 4221 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4222 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4223 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4224 /* 4225 * If its in the TCP pool, its NOT allowed to create an 4226 * association. The parent listener needs to call 4227 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4228 * off, or connected one does this.. its an error. 4229 */ 4230 SCTP_INP_RUNLOCK(inp); 4231 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4232 *error = EINVAL; 4233 return (NULL); 4234 } 4235 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4236 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4237 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4238 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4239 SCTP_INP_RUNLOCK(inp); 4240 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4241 *error = EINVAL; 4242 return (NULL); 4243 } 4244 } 4245 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4246 #ifdef SCTP_DEBUG 4247 if (firstaddr) { 4248 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4249 switch (firstaddr->sa_family) { 4250 #ifdef INET 4251 case AF_INET: 4252 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4253 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4254 break; 4255 #endif 4256 #ifdef INET6 4257 case AF_INET6: 4258 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4259 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4260 break; 4261 #endif 4262 default: 4263 break; 4264 } 4265 } else { 4266 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4267 } 4268 #endif /* SCTP_DEBUG */ 4269 switch (firstaddr->sa_family) { 4270 #ifdef INET 4271 case AF_INET: 4272 { 4273 struct sockaddr_in *sin; 4274 4275 sin = (struct sockaddr_in *)firstaddr; 4276 if ((ntohs(sin->sin_port) == 0) || 4277 (sin->sin_addr.s_addr == INADDR_ANY) || 4278 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4279 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4280 /* Invalid address */ 4281 SCTP_INP_RUNLOCK(inp); 4282 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4283 *error = EINVAL; 4284 return (NULL); 4285 } 4286 rport = sin->sin_port; 4287 break; 4288 } 4289 #endif 4290 #ifdef INET6 4291 case AF_INET6: 4292 { 4293 struct sockaddr_in6 *sin6; 4294 4295 sin6 = (struct sockaddr_in6 *)firstaddr; 4296 if ((ntohs(sin6->sin6_port) == 0) || 4297 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4298 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4299 /* Invalid address */ 4300 SCTP_INP_RUNLOCK(inp); 4301 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4302 *error = EINVAL; 4303 return (NULL); 4304 } 4305 rport = sin6->sin6_port; 4306 break; 4307 } 4308 #endif 4309 default: 4310 /* not supported family type */ 4311 SCTP_INP_RUNLOCK(inp); 4312 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4313 *error = EINVAL; 4314 return (NULL); 4315 } 4316 SCTP_INP_RUNLOCK(inp); 4317 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4318 /* 4319 * If you have not performed a bind, then we need to do the 4320 * ephemeral bind for you. 4321 */ 4322 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4323 (struct sockaddr *)NULL, 4324 (struct sctp_ifa *)NULL, 4325 p 4326 ))) { 4327 /* bind error, probably perm */ 4328 *error = err; 4329 return (NULL); 4330 } 4331 } 4332 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4333 if (stcb == NULL) { 4334 /* out of memory? */ 4335 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4336 *error = ENOMEM; 4337 return (NULL); 4338 } 4339 SCTP_INCR_ASOC_COUNT(); 4340 4341 memset(stcb, 0, sizeof(*stcb)); 4342 asoc = &stcb->asoc; 4343 4344 SCTP_TCB_LOCK_INIT(stcb); 4345 SCTP_TCB_SEND_LOCK_INIT(stcb); 4346 stcb->rport = rport; 4347 /* setup back pointer's */ 4348 stcb->sctp_ep = inp; 4349 stcb->sctp_socket = inp->sctp_socket; 4350 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4351 /* failed */ 4352 SCTP_TCB_LOCK_DESTROY(stcb); 4353 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4354 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4355 SCTP_DECR_ASOC_COUNT(); 4356 *error = err; 4357 return (NULL); 4358 } 4359 /* and the port */ 4360 SCTP_INP_INFO_WLOCK(); 4361 SCTP_INP_WLOCK(inp); 4362 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4363 /* inpcb freed while alloc going on */ 4364 SCTP_TCB_LOCK_DESTROY(stcb); 4365 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4366 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4367 SCTP_INP_WUNLOCK(inp); 4368 SCTP_INP_INFO_WUNLOCK(); 4369 SCTP_DECR_ASOC_COUNT(); 4370 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4371 *error = EINVAL; 4372 return (NULL); 4373 } 4374 SCTP_TCB_LOCK(stcb); 4375 4376 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4377 /* now that my_vtag is set, add it to the hash */ 4378 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4379 /* put it in the bucket in the vtag hash of assoc's for the system */ 4380 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4381 SCTP_INP_INFO_WUNLOCK(); 4382 4383 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4384 /* failure.. memory error? */ 4385 if (asoc->strmout) { 4386 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4387 asoc->strmout = NULL; 4388 } 4389 if (asoc->mapping_array) { 4390 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4391 asoc->mapping_array = NULL; 4392 } 4393 if (asoc->nr_mapping_array) { 4394 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4395 asoc->nr_mapping_array = NULL; 4396 } 4397 SCTP_DECR_ASOC_COUNT(); 4398 SCTP_TCB_UNLOCK(stcb); 4399 SCTP_TCB_LOCK_DESTROY(stcb); 4400 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4401 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4402 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4403 SCTP_INP_WUNLOCK(inp); 4404 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4405 *error = ENOBUFS; 4406 return (NULL); 4407 } 4408 /* Init all the timers */ 4409 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4410 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4411 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4412 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4413 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4414 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4415 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4416 4417 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4418 /* now file the port under the hash as well */ 4419 if (inp->sctp_tcbhash != NULL) { 4420 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4421 inp->sctp_hashmark)]; 4422 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4423 } 4424 SCTP_INP_WUNLOCK(inp); 4425 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4426 return (stcb); 4427 } 4428 4429 4430 void 4431 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4432 { 4433 struct sctp_association *asoc; 4434 4435 asoc = &stcb->asoc; 4436 asoc->numnets--; 4437 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4438 if (net == asoc->primary_destination) { 4439 /* Reset primary */ 4440 struct sctp_nets *lnet; 4441 4442 lnet = TAILQ_FIRST(&asoc->nets); 4443 /* 4444 * Mobility adaptation Ideally, if deleted destination is 4445 * the primary, it becomes a fast retransmission trigger by 4446 * the subsequent SET PRIMARY. (by micchie) 4447 */ 4448 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4449 SCTP_MOBILITY_BASE) || 4450 sctp_is_mobility_feature_on(stcb->sctp_ep, 4451 SCTP_MOBILITY_FASTHANDOFF)) { 4452 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4453 if (asoc->deleted_primary != NULL) { 4454 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4455 goto out; 4456 } 4457 asoc->deleted_primary = net; 4458 atomic_add_int(&net->ref_count, 1); 4459 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4460 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4461 sctp_mobility_feature_on(stcb->sctp_ep, 4462 SCTP_MOBILITY_PRIM_DELETED); 4463 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4464 stcb->sctp_ep, stcb, NULL); 4465 } 4466 out: 4467 /* Try to find a confirmed primary */ 4468 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4469 } 4470 if (net == asoc->last_data_chunk_from) { 4471 /* Reset primary */ 4472 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4473 } 4474 if (net == asoc->last_control_chunk_from) { 4475 /* Clear net */ 4476 asoc->last_control_chunk_from = NULL; 4477 } 4478 if (net == stcb->asoc.alternate) { 4479 sctp_free_remote_addr(stcb->asoc.alternate); 4480 stcb->asoc.alternate = NULL; 4481 } 4482 sctp_free_remote_addr(net); 4483 } 4484 4485 /* 4486 * remove a remote endpoint address from an association, it will fail if the 4487 * address does not exist. 4488 */ 4489 int 4490 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4491 { 4492 /* 4493 * Here we need to remove a remote address. This is quite simple, we 4494 * first find it in the list of address for the association 4495 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4496 * on that item. Note we do not allow it to be removed if there are 4497 * no other addresses. 4498 */ 4499 struct sctp_association *asoc; 4500 struct sctp_nets *net, *nnet; 4501 4502 asoc = &stcb->asoc; 4503 4504 /* locate the address */ 4505 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4506 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4507 continue; 4508 } 4509 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4510 remaddr)) { 4511 /* we found the guy */ 4512 if (asoc->numnets < 2) { 4513 /* Must have at LEAST two remote addresses */ 4514 return (-1); 4515 } else { 4516 sctp_remove_net(stcb, net); 4517 return (0); 4518 } 4519 } 4520 } 4521 /* not found. */ 4522 return (-2); 4523 } 4524 4525 void 4526 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4527 { 4528 struct sctpvtaghead *chain; 4529 struct sctp_tagblock *twait_block; 4530 int found = 0; 4531 int i; 4532 4533 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4534 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4535 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4536 if ((twait_block->vtag_block[i].v_tag == tag) && 4537 (twait_block->vtag_block[i].lport == lport) && 4538 (twait_block->vtag_block[i].rport == rport)) { 4539 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4540 twait_block->vtag_block[i].v_tag = 0; 4541 twait_block->vtag_block[i].lport = 0; 4542 twait_block->vtag_block[i].rport = 0; 4543 found = 1; 4544 break; 4545 } 4546 } 4547 if (found) 4548 break; 4549 } 4550 } 4551 4552 int 4553 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4554 { 4555 struct sctpvtaghead *chain; 4556 struct sctp_tagblock *twait_block; 4557 int found = 0; 4558 int i; 4559 4560 SCTP_INP_INFO_WLOCK(); 4561 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4562 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4563 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4564 if ((twait_block->vtag_block[i].v_tag == tag) && 4565 (twait_block->vtag_block[i].lport == lport) && 4566 (twait_block->vtag_block[i].rport == rport)) { 4567 found = 1; 4568 break; 4569 } 4570 } 4571 if (found) 4572 break; 4573 } 4574 SCTP_INP_INFO_WUNLOCK(); 4575 return (found); 4576 } 4577 4578 4579 void 4580 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4581 { 4582 struct sctpvtaghead *chain; 4583 struct sctp_tagblock *twait_block; 4584 struct timeval now; 4585 int set, i; 4586 4587 if (time == 0) { 4588 /* Its disabled */ 4589 return; 4590 } 4591 (void)SCTP_GETTIME_TIMEVAL(&now); 4592 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4593 set = 0; 4594 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4595 /* Block(s) present, lets find space, and expire on the fly */ 4596 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4597 if ((twait_block->vtag_block[i].v_tag == 0) && 4598 !set) { 4599 twait_block->vtag_block[i].tv_sec_at_expire = 4600 now.tv_sec + time; 4601 twait_block->vtag_block[i].v_tag = tag; 4602 twait_block->vtag_block[i].lport = lport; 4603 twait_block->vtag_block[i].rport = rport; 4604 set = 1; 4605 } else if ((twait_block->vtag_block[i].v_tag) && 4606 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4607 /* Audit expires this guy */ 4608 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4609 twait_block->vtag_block[i].v_tag = 0; 4610 twait_block->vtag_block[i].lport = 0; 4611 twait_block->vtag_block[i].rport = 0; 4612 if (set == 0) { 4613 /* Reuse it for my new tag */ 4614 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4615 twait_block->vtag_block[i].v_tag = tag; 4616 twait_block->vtag_block[i].lport = lport; 4617 twait_block->vtag_block[i].rport = rport; 4618 set = 1; 4619 } 4620 } 4621 } 4622 if (set) { 4623 /* 4624 * We only do up to the block where we can place our 4625 * tag for audits 4626 */ 4627 break; 4628 } 4629 } 4630 /* Need to add a new block to chain */ 4631 if (!set) { 4632 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4633 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4634 if (twait_block == NULL) { 4635 #ifdef INVARIANTS 4636 panic("Can not alloc tagblock"); 4637 #endif 4638 return; 4639 } 4640 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4641 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4642 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4643 twait_block->vtag_block[0].v_tag = tag; 4644 twait_block->vtag_block[0].lport = lport; 4645 twait_block->vtag_block[0].rport = rport; 4646 } 4647 } 4648 4649 void 4650 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4651 { 4652 struct sctp_tmit_chunk *chk, *nchk; 4653 struct sctp_queued_to_read *control, *ncontrol; 4654 4655 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4656 TAILQ_REMOVE(rh, control, next_instrm); 4657 control->on_strm_q = 0; 4658 if (control->on_read_q == 0) { 4659 sctp_free_remote_addr(control->whoFrom); 4660 if (control->data) { 4661 sctp_m_freem(control->data); 4662 control->data = NULL; 4663 } 4664 } 4665 /* Reassembly free? */ 4666 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4667 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4668 if (chk->data) { 4669 sctp_m_freem(chk->data); 4670 chk->data = NULL; 4671 } 4672 if (chk->holds_key_ref) 4673 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4674 sctp_free_remote_addr(chk->whoTo); 4675 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4676 SCTP_DECR_CHK_COUNT(); 4677 /* sa_ignore FREED_MEMORY */ 4678 } 4679 /* 4680 * We don't free the address here since all the net's were 4681 * freed above. 4682 */ 4683 if (control->on_read_q == 0) { 4684 sctp_free_a_readq(stcb, control); 4685 } 4686 } 4687 } 4688 4689 4690 /*- 4691 * Free the association after un-hashing the remote port. This 4692 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4693 * expect that the input to this function IS a locked TCB. 4694 * It will return 0, if it did NOT destroy the association (instead 4695 * it unlocks it. It will return NON-zero if it either destroyed the 4696 * association OR the association is already destroyed. 4697 */ 4698 int 4699 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4700 { 4701 int i; 4702 struct sctp_association *asoc; 4703 struct sctp_nets *net, *nnet; 4704 struct sctp_laddr *laddr, *naddr; 4705 struct sctp_tmit_chunk *chk, *nchk; 4706 struct sctp_asconf_addr *aparam, *naparam; 4707 struct sctp_asconf_ack *aack, *naack; 4708 struct sctp_stream_reset_list *strrst, *nstrrst; 4709 struct sctp_queued_to_read *sq, *nsq; 4710 struct sctp_stream_queue_pending *sp, *nsp; 4711 sctp_sharedkey_t *shared_key, *nshared_key; 4712 struct socket *so; 4713 4714 /* first, lets purge the entry from the hash table. */ 4715 4716 #ifdef SCTP_LOG_CLOSING 4717 sctp_log_closing(inp, stcb, 6); 4718 #endif 4719 if (stcb->asoc.state == 0) { 4720 #ifdef SCTP_LOG_CLOSING 4721 sctp_log_closing(inp, NULL, 7); 4722 #endif 4723 /* there is no asoc, really TSNH :-0 */ 4724 return (1); 4725 } 4726 if (stcb->asoc.alternate) { 4727 sctp_free_remote_addr(stcb->asoc.alternate); 4728 stcb->asoc.alternate = NULL; 4729 } 4730 /* TEMP CODE */ 4731 if (stcb->freed_from_where == 0) { 4732 /* Only record the first place free happened from */ 4733 stcb->freed_from_where = from_location; 4734 } 4735 /* TEMP CODE */ 4736 4737 asoc = &stcb->asoc; 4738 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4739 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4740 /* nothing around */ 4741 so = NULL; 4742 else 4743 so = inp->sctp_socket; 4744 4745 /* 4746 * We used timer based freeing if a reader or writer is in the way. 4747 * So we first check if we are actually being called from a timer, 4748 * if so we abort early if a reader or writer is still in the way. 4749 */ 4750 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4751 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4752 /* 4753 * is it the timer driving us? if so are the reader/writers 4754 * gone? 4755 */ 4756 if (stcb->asoc.refcnt) { 4757 /* nope, reader or writer in the way */ 4758 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4759 /* no asoc destroyed */ 4760 SCTP_TCB_UNLOCK(stcb); 4761 #ifdef SCTP_LOG_CLOSING 4762 sctp_log_closing(inp, stcb, 8); 4763 #endif 4764 return (0); 4765 } 4766 } 4767 /* now clean up any other timers */ 4768 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4769 asoc->dack_timer.self = NULL; 4770 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4771 /*- 4772 * For stream reset we don't blast this unless 4773 * it is a str-reset timer, it might be the 4774 * free-asoc timer which we DON'T want to 4775 * disturb. 4776 */ 4777 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4778 asoc->strreset_timer.self = NULL; 4779 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4780 asoc->asconf_timer.self = NULL; 4781 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4782 asoc->autoclose_timer.self = NULL; 4783 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4784 asoc->shut_guard_timer.self = NULL; 4785 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4786 asoc->delayed_event_timer.self = NULL; 4787 /* Mobility adaptation */ 4788 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4789 asoc->delete_prim_timer.self = NULL; 4790 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4791 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4792 net->rxt_timer.self = NULL; 4793 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4794 net->pmtu_timer.self = NULL; 4795 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4796 net->hb_timer.self = NULL; 4797 } 4798 /* Now the read queue needs to be cleaned up (only once) */ 4799 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4800 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4801 SCTP_INP_READ_LOCK(inp); 4802 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4803 if (sq->stcb == stcb) { 4804 sq->do_not_ref_stcb = 1; 4805 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4806 /* 4807 * If there is no end, there never will be 4808 * now. 4809 */ 4810 if (sq->end_added == 0) { 4811 /* Held for PD-API clear that. */ 4812 sq->pdapi_aborted = 1; 4813 sq->held_length = 0; 4814 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4815 /* 4816 * Need to add a PD-API 4817 * aborted indication. 4818 * Setting the control_pdapi 4819 * assures that it will be 4820 * added right after this 4821 * msg. 4822 */ 4823 uint32_t strseq; 4824 4825 stcb->asoc.control_pdapi = sq; 4826 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4827 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4828 stcb, 4829 SCTP_PARTIAL_DELIVERY_ABORTED, 4830 (void *)&strseq, 4831 SCTP_SO_LOCKED); 4832 stcb->asoc.control_pdapi = NULL; 4833 } 4834 } 4835 /* Add an end to wake them */ 4836 sq->end_added = 1; 4837 } 4838 } 4839 SCTP_INP_READ_UNLOCK(inp); 4840 if (stcb->block_entry) { 4841 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4842 stcb->block_entry->error = ECONNRESET; 4843 stcb->block_entry = NULL; 4844 } 4845 } 4846 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4847 /* 4848 * Someone holds a reference OR the socket is unaccepted 4849 * yet. 4850 */ 4851 if ((stcb->asoc.refcnt) || 4852 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4853 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4854 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4855 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4856 } 4857 SCTP_TCB_UNLOCK(stcb); 4858 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4859 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4860 /* nothing around */ 4861 so = NULL; 4862 if (so) { 4863 /* Wake any reader/writers */ 4864 sctp_sorwakeup(inp, so); 4865 sctp_sowwakeup(inp, so); 4866 } 4867 4868 #ifdef SCTP_LOG_CLOSING 4869 sctp_log_closing(inp, stcb, 9); 4870 #endif 4871 /* no asoc destroyed */ 4872 return (0); 4873 } 4874 #ifdef SCTP_LOG_CLOSING 4875 sctp_log_closing(inp, stcb, 10); 4876 #endif 4877 /* 4878 * When I reach here, no others want to kill the assoc yet.. and I 4879 * own the lock. Now its possible an abort comes in when I do the 4880 * lock exchange below to grab all the locks to do the final take 4881 * out. to prevent this we increment the count, which will start a 4882 * timer and blow out above thus assuring us that we hold exclusive 4883 * killing of the asoc. Note that after getting back the TCB lock we 4884 * will go ahead and increment the counter back up and stop any 4885 * timer a passing stranger may have started :-S 4886 */ 4887 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4888 atomic_add_int(&stcb->asoc.refcnt, 1); 4889 4890 SCTP_TCB_UNLOCK(stcb); 4891 SCTP_INP_INFO_WLOCK(); 4892 SCTP_INP_WLOCK(inp); 4893 SCTP_TCB_LOCK(stcb); 4894 } 4895 /* Double check the GONE flag */ 4896 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4897 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4898 /* nothing around */ 4899 so = NULL; 4900 4901 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4902 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4903 /* 4904 * For TCP type we need special handling when we are 4905 * connected. We also include the peel'ed off ones to. 4906 */ 4907 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4908 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4909 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4910 if (so) { 4911 SOCKBUF_LOCK(&so->so_rcv); 4912 if (so->so_rcv.sb_cc == 0) { 4913 so->so_state &= ~(SS_ISCONNECTING | 4914 SS_ISDISCONNECTING | 4915 SS_ISCONFIRMING | 4916 SS_ISCONNECTED); 4917 } 4918 socantrcvmore_locked(so); 4919 socantsendmore(so); 4920 sctp_sowwakeup(inp, so); 4921 sctp_sorwakeup(inp, so); 4922 SCTP_SOWAKEUP(so); 4923 } 4924 } 4925 } 4926 4927 /* 4928 * Make it invalid too, that way if its about to run it will abort 4929 * and return. 4930 */ 4931 /* re-increment the lock */ 4932 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4933 atomic_add_int(&stcb->asoc.refcnt, -1); 4934 } 4935 if (stcb->asoc.refcnt) { 4936 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4937 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4938 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4939 SCTP_INP_INFO_WUNLOCK(); 4940 SCTP_INP_WUNLOCK(inp); 4941 } 4942 SCTP_TCB_UNLOCK(stcb); 4943 return (0); 4944 } 4945 asoc->state = 0; 4946 if (inp->sctp_tcbhash) { 4947 LIST_REMOVE(stcb, sctp_tcbhash); 4948 } 4949 if (stcb->asoc.in_asocid_hash) { 4950 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4951 } 4952 /* Now lets remove it from the list of ALL associations in the EP */ 4953 LIST_REMOVE(stcb, sctp_tcblist); 4954 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4955 SCTP_INP_INCR_REF(inp); 4956 SCTP_INP_WUNLOCK(inp); 4957 } 4958 /* pull from vtag hash */ 4959 LIST_REMOVE(stcb, sctp_asocs); 4960 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4961 inp->sctp_lport, stcb->rport); 4962 4963 /* 4964 * Now restop the timers to be sure this is paranoia at is finest! 4965 */ 4966 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4967 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4968 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4969 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4970 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4971 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4972 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4973 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4974 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4975 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4976 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4977 } 4978 4979 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4980 /* 4981 * The chunk lists and such SHOULD be empty but we check them just 4982 * in case. 4983 */ 4984 /* anything on the wheel needs to be removed */ 4985 for (i = 0; i < asoc->streamoutcnt; i++) { 4986 struct sctp_stream_out *outs; 4987 4988 outs = &asoc->strmout[i]; 4989 /* now clean up any chunks here */ 4990 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4991 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4992 TAILQ_REMOVE(&outs->outqueue, sp, next); 4993 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0); 4994 sctp_free_spbufspace(stcb, asoc, sp); 4995 if (sp->data) { 4996 if (so) { 4997 /* Still an open socket - report */ 4998 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4999 0, (void *)sp, SCTP_SO_LOCKED); 5000 } 5001 if (sp->data) { 5002 sctp_m_freem(sp->data); 5003 sp->data = NULL; 5004 sp->tail_mbuf = NULL; 5005 sp->length = 0; 5006 } 5007 } 5008 if (sp->net) { 5009 sctp_free_remote_addr(sp->net); 5010 sp->net = NULL; 5011 } 5012 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 5013 } 5014 } 5015 /* sa_ignore FREED_MEMORY */ 5016 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 5017 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 5018 SCTP_FREE(strrst, SCTP_M_STRESET); 5019 } 5020 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 5021 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 5022 if (sq->data) { 5023 sctp_m_freem(sq->data); 5024 sq->data = NULL; 5025 } 5026 sctp_free_remote_addr(sq->whoFrom); 5027 sq->whoFrom = NULL; 5028 sq->stcb = NULL; 5029 /* Free the ctl entry */ 5030 sctp_free_a_readq(stcb, sq); 5031 /* sa_ignore FREED_MEMORY */ 5032 } 5033 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 5034 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5035 if (chk->data) { 5036 sctp_m_freem(chk->data); 5037 chk->data = NULL; 5038 } 5039 if (chk->holds_key_ref) 5040 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5041 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5042 SCTP_DECR_CHK_COUNT(); 5043 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5044 asoc->free_chunk_cnt--; 5045 /* sa_ignore FREED_MEMORY */ 5046 } 5047 /* pending send queue SHOULD be empty */ 5048 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5049 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5050 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5051 #ifdef INVARIANTS 5052 } else { 5053 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5054 #endif 5055 } 5056 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5057 if (chk->data) { 5058 if (so) { 5059 /* Still a socket? */ 5060 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5061 0, chk, SCTP_SO_LOCKED); 5062 } 5063 if (chk->data) { 5064 sctp_m_freem(chk->data); 5065 chk->data = NULL; 5066 } 5067 } 5068 if (chk->holds_key_ref) 5069 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5070 if (chk->whoTo) { 5071 sctp_free_remote_addr(chk->whoTo); 5072 chk->whoTo = NULL; 5073 } 5074 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5075 SCTP_DECR_CHK_COUNT(); 5076 /* sa_ignore FREED_MEMORY */ 5077 } 5078 /* sent queue SHOULD be empty */ 5079 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5080 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5081 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5082 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5083 #ifdef INVARIANTS 5084 } else { 5085 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5086 #endif 5087 } 5088 } 5089 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5090 if (chk->data) { 5091 if (so) { 5092 /* Still a socket? */ 5093 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5094 0, chk, SCTP_SO_LOCKED); 5095 } 5096 if (chk->data) { 5097 sctp_m_freem(chk->data); 5098 chk->data = NULL; 5099 } 5100 } 5101 if (chk->holds_key_ref) 5102 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5103 sctp_free_remote_addr(chk->whoTo); 5104 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5105 SCTP_DECR_CHK_COUNT(); 5106 /* sa_ignore FREED_MEMORY */ 5107 } 5108 #ifdef INVARIANTS 5109 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5110 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5111 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5112 } 5113 } 5114 #endif 5115 /* control queue MAY not be empty */ 5116 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5117 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5118 if (chk->data) { 5119 sctp_m_freem(chk->data); 5120 chk->data = NULL; 5121 } 5122 if (chk->holds_key_ref) 5123 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5124 sctp_free_remote_addr(chk->whoTo); 5125 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5126 SCTP_DECR_CHK_COUNT(); 5127 /* sa_ignore FREED_MEMORY */ 5128 } 5129 /* ASCONF queue MAY not be empty */ 5130 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5131 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5132 if (chk->data) { 5133 sctp_m_freem(chk->data); 5134 chk->data = NULL; 5135 } 5136 if (chk->holds_key_ref) 5137 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5138 sctp_free_remote_addr(chk->whoTo); 5139 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5140 SCTP_DECR_CHK_COUNT(); 5141 /* sa_ignore FREED_MEMORY */ 5142 } 5143 if (asoc->mapping_array) { 5144 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5145 asoc->mapping_array = NULL; 5146 } 5147 if (asoc->nr_mapping_array) { 5148 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5149 asoc->nr_mapping_array = NULL; 5150 } 5151 /* the stream outs */ 5152 if (asoc->strmout) { 5153 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5154 asoc->strmout = NULL; 5155 } 5156 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5157 if (asoc->strmin) { 5158 for (i = 0; i < asoc->streamincnt; i++) { 5159 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5160 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5161 } 5162 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5163 asoc->strmin = NULL; 5164 } 5165 asoc->streamincnt = 0; 5166 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5167 #ifdef INVARIANTS 5168 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5169 panic("no net's left alloc'ed, or list points to itself"); 5170 } 5171 #endif 5172 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5173 sctp_free_remote_addr(net); 5174 } 5175 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5176 /* sa_ignore FREED_MEMORY */ 5177 sctp_remove_laddr(laddr); 5178 } 5179 5180 /* pending asconf (address) parameters */ 5181 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5182 /* sa_ignore FREED_MEMORY */ 5183 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5184 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5185 } 5186 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5187 /* sa_ignore FREED_MEMORY */ 5188 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5189 if (aack->data != NULL) { 5190 sctp_m_freem(aack->data); 5191 } 5192 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5193 } 5194 /* clean up auth stuff */ 5195 if (asoc->local_hmacs) 5196 sctp_free_hmaclist(asoc->local_hmacs); 5197 if (asoc->peer_hmacs) 5198 sctp_free_hmaclist(asoc->peer_hmacs); 5199 5200 if (asoc->local_auth_chunks) 5201 sctp_free_chunklist(asoc->local_auth_chunks); 5202 if (asoc->peer_auth_chunks) 5203 sctp_free_chunklist(asoc->peer_auth_chunks); 5204 5205 sctp_free_authinfo(&asoc->authinfo); 5206 5207 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5208 LIST_REMOVE(shared_key, next); 5209 sctp_free_sharedkey(shared_key); 5210 /* sa_ignore FREED_MEMORY */ 5211 } 5212 5213 /* Insert new items here :> */ 5214 5215 /* Get rid of LOCK */ 5216 SCTP_TCB_UNLOCK(stcb); 5217 SCTP_TCB_LOCK_DESTROY(stcb); 5218 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5219 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5220 SCTP_INP_INFO_WUNLOCK(); 5221 SCTP_INP_RLOCK(inp); 5222 } 5223 #ifdef SCTP_TRACK_FREED_ASOCS 5224 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5225 /* now clean up the tasoc itself */ 5226 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5227 SCTP_DECR_ASOC_COUNT(); 5228 } else { 5229 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5230 } 5231 #else 5232 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5233 SCTP_DECR_ASOC_COUNT(); 5234 #endif 5235 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5236 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5237 /* 5238 * If its NOT the inp_free calling us AND sctp_close 5239 * as been called, we call back... 5240 */ 5241 SCTP_INP_RUNLOCK(inp); 5242 /* 5243 * This will start the kill timer (if we are the 5244 * last one) since we hold an increment yet. But 5245 * this is the only safe way to do this since 5246 * otherwise if the socket closes at the same time 5247 * we are here we might collide in the cleanup. 5248 */ 5249 sctp_inpcb_free(inp, 5250 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5251 SCTP_CALLED_DIRECTLY_NOCMPSET); 5252 SCTP_INP_DECR_REF(inp); 5253 goto out_of; 5254 } else { 5255 /* The socket is still open. */ 5256 SCTP_INP_DECR_REF(inp); 5257 } 5258 } 5259 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5260 SCTP_INP_RUNLOCK(inp); 5261 } 5262 out_of: 5263 /* destroyed the asoc */ 5264 #ifdef SCTP_LOG_CLOSING 5265 sctp_log_closing(inp, NULL, 11); 5266 #endif 5267 return (1); 5268 } 5269 5270 5271 5272 /* 5273 * determine if a destination is "reachable" based upon the addresses bound 5274 * to the current endpoint (e.g. only v4 or v6 currently bound) 5275 */ 5276 /* 5277 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5278 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5279 * types bound as its endpoint 5280 */ 5281 int 5282 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5283 { 5284 struct sctp_inpcb *inp; 5285 int answer; 5286 5287 /* 5288 * No locks here, the TCB, in all cases is already locked and an 5289 * assoc is up. There is either a INP lock by the caller applied (in 5290 * asconf case when deleting an address) or NOT in the HB case, 5291 * however if HB then the INP increment is up and the INP will not 5292 * be removed (on top of the fact that we have a TCB lock). So we 5293 * only want to read the sctp_flags, which is either bound-all or 5294 * not.. no protection needed since once an assoc is up you can't be 5295 * changing your binding. 5296 */ 5297 inp = stcb->sctp_ep; 5298 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5299 /* if bound all, destination is not restricted */ 5300 /* 5301 * RRS: Question during lock work: Is this correct? If you 5302 * are bound-all you still might need to obey the V4--V6 5303 * flags??? IMO this bound-all stuff needs to be removed! 5304 */ 5305 return (1); 5306 } 5307 /* NOTE: all "scope" checks are done when local addresses are added */ 5308 switch (destaddr->sa_family) { 5309 #ifdef INET6 5310 case AF_INET6: 5311 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5312 break; 5313 #endif 5314 #ifdef INET 5315 case AF_INET: 5316 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5317 break; 5318 #endif 5319 default: 5320 /* invalid family, so it's unreachable */ 5321 answer = 0; 5322 break; 5323 } 5324 return (answer); 5325 } 5326 5327 /* 5328 * update the inp_vflags on an endpoint 5329 */ 5330 static void 5331 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5332 { 5333 struct sctp_laddr *laddr; 5334 5335 /* first clear the flag */ 5336 inp->ip_inp.inp.inp_vflag = 0; 5337 /* set the flag based on addresses on the ep list */ 5338 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5339 if (laddr->ifa == NULL) { 5340 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5341 __func__); 5342 continue; 5343 } 5344 5345 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5346 continue; 5347 } 5348 switch (laddr->ifa->address.sa.sa_family) { 5349 #ifdef INET6 5350 case AF_INET6: 5351 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5352 break; 5353 #endif 5354 #ifdef INET 5355 case AF_INET: 5356 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5357 break; 5358 #endif 5359 default: 5360 break; 5361 } 5362 } 5363 } 5364 5365 /* 5366 * Add the address to the endpoint local address list There is nothing to be 5367 * done if we are bound to all addresses 5368 */ 5369 void 5370 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5371 { 5372 struct sctp_laddr *laddr; 5373 struct sctp_tcb *stcb; 5374 int fnd, error = 0; 5375 5376 fnd = 0; 5377 5378 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5379 /* You are already bound to all. You have it already */ 5380 return; 5381 } 5382 #ifdef INET6 5383 if (ifa->address.sa.sa_family == AF_INET6) { 5384 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5385 /* Can't bind a non-useable addr. */ 5386 return; 5387 } 5388 } 5389 #endif 5390 /* first, is it already present? */ 5391 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5392 if (laddr->ifa == ifa) { 5393 fnd = 1; 5394 break; 5395 } 5396 } 5397 5398 if (fnd == 0) { 5399 /* Not in the ep list */ 5400 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5401 if (error != 0) 5402 return; 5403 inp->laddr_count++; 5404 /* update inp_vflag flags */ 5405 switch (ifa->address.sa.sa_family) { 5406 #ifdef INET6 5407 case AF_INET6: 5408 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5409 break; 5410 #endif 5411 #ifdef INET 5412 case AF_INET: 5413 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5414 break; 5415 #endif 5416 default: 5417 break; 5418 } 5419 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5420 sctp_add_local_addr_restricted(stcb, ifa); 5421 } 5422 } 5423 return; 5424 } 5425 5426 5427 /* 5428 * select a new (hopefully reachable) destination net (should only be used 5429 * when we deleted an ep addr that is the only usable source address to reach 5430 * the destination net) 5431 */ 5432 static void 5433 sctp_select_primary_destination(struct sctp_tcb *stcb) 5434 { 5435 struct sctp_nets *net; 5436 5437 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5438 /* for now, we'll just pick the first reachable one we find */ 5439 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5440 continue; 5441 if (sctp_destination_is_reachable(stcb, 5442 (struct sockaddr *)&net->ro._l_addr)) { 5443 /* found a reachable destination */ 5444 stcb->asoc.primary_destination = net; 5445 } 5446 } 5447 /* I can't there from here! ...we're gonna die shortly... */ 5448 } 5449 5450 5451 /* 5452 * Delete the address from the endpoint local address list. There is nothing 5453 * to be done if we are bound to all addresses 5454 */ 5455 void 5456 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5457 { 5458 struct sctp_laddr *laddr; 5459 int fnd; 5460 5461 fnd = 0; 5462 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5463 /* You are already bound to all. You have it already */ 5464 return; 5465 } 5466 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5467 if (laddr->ifa == ifa) { 5468 fnd = 1; 5469 break; 5470 } 5471 } 5472 if (fnd && (inp->laddr_count < 2)) { 5473 /* can't delete unless there are at LEAST 2 addresses */ 5474 return; 5475 } 5476 if (fnd) { 5477 /* 5478 * clean up any use of this address go through our 5479 * associations and clear any last_used_address that match 5480 * this one for each assoc, see if a new primary_destination 5481 * is needed 5482 */ 5483 struct sctp_tcb *stcb; 5484 5485 /* clean up "next_addr_touse" */ 5486 if (inp->next_addr_touse == laddr) 5487 /* delete this address */ 5488 inp->next_addr_touse = NULL; 5489 5490 /* clean up "last_used_address" */ 5491 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5492 struct sctp_nets *net; 5493 5494 SCTP_TCB_LOCK(stcb); 5495 if (stcb->asoc.last_used_address == laddr) 5496 /* delete this address */ 5497 stcb->asoc.last_used_address = NULL; 5498 /* 5499 * Now spin through all the nets and purge any ref 5500 * to laddr 5501 */ 5502 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5503 if (net->ro._s_addr == laddr->ifa) { 5504 /* Yep, purge src address selected */ 5505 sctp_rtentry_t *rt; 5506 5507 /* delete this address if cached */ 5508 rt = net->ro.ro_rt; 5509 if (rt != NULL) { 5510 RTFREE(rt); 5511 net->ro.ro_rt = NULL; 5512 } 5513 sctp_free_ifa(net->ro._s_addr); 5514 net->ro._s_addr = NULL; 5515 net->src_addr_selected = 0; 5516 } 5517 } 5518 SCTP_TCB_UNLOCK(stcb); 5519 } /* for each tcb */ 5520 /* remove it from the ep list */ 5521 sctp_remove_laddr(laddr); 5522 inp->laddr_count--; 5523 /* update inp_vflag flags */ 5524 sctp_update_ep_vflag(inp); 5525 } 5526 return; 5527 } 5528 5529 /* 5530 * Add the address to the TCB local address restricted list. 5531 * This is a "pending" address list (eg. addresses waiting for an 5532 * ASCONF-ACK response) and cannot be used as a valid source address. 5533 */ 5534 void 5535 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5536 { 5537 struct sctp_laddr *laddr; 5538 struct sctpladdr *list; 5539 5540 /* 5541 * Assumes TCB is locked.. and possibly the INP. May need to 5542 * confirm/fix that if we need it and is not the case. 5543 */ 5544 list = &stcb->asoc.sctp_restricted_addrs; 5545 5546 #ifdef INET6 5547 if (ifa->address.sa.sa_family == AF_INET6) { 5548 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5549 /* Can't bind a non-existent addr. */ 5550 return; 5551 } 5552 } 5553 #endif 5554 /* does the address already exist? */ 5555 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5556 if (laddr->ifa == ifa) { 5557 return; 5558 } 5559 } 5560 5561 /* add to the list */ 5562 (void)sctp_insert_laddr(list, ifa, 0); 5563 return; 5564 } 5565 5566 /* 5567 * Remove a local address from the TCB local address restricted list 5568 */ 5569 void 5570 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5571 { 5572 struct sctp_inpcb *inp; 5573 struct sctp_laddr *laddr; 5574 5575 /* 5576 * This is called by asconf work. It is assumed that a) The TCB is 5577 * locked and b) The INP is locked. This is true in as much as I can 5578 * trace through the entry asconf code where I did these locks. 5579 * Again, the ASCONF code is a bit different in that it does lock 5580 * the INP during its work often times. This must be since we don't 5581 * want other proc's looking up things while what they are looking 5582 * up is changing :-D 5583 */ 5584 5585 inp = stcb->sctp_ep; 5586 /* if subset bound and don't allow ASCONF's, can't delete last */ 5587 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5588 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5589 if (stcb->sctp_ep->laddr_count < 2) { 5590 /* can't delete last address */ 5591 return; 5592 } 5593 } 5594 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5595 /* remove the address if it exists */ 5596 if (laddr->ifa == NULL) 5597 continue; 5598 if (laddr->ifa == ifa) { 5599 sctp_remove_laddr(laddr); 5600 return; 5601 } 5602 } 5603 5604 /* address not found! */ 5605 return; 5606 } 5607 5608 /* 5609 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5610 */ 5611 /* sysctl */ 5612 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5613 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5614 5615 5616 5617 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5618 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5619 int *sctp_cpuarry = NULL; 5620 void 5621 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5622 { 5623 /* Queue a packet to a processor for the specified core */ 5624 struct sctp_mcore_queue *qent; 5625 struct sctp_mcore_ctrl *wkq; 5626 int need_wake = 0; 5627 5628 if (sctp_mcore_workers == NULL) { 5629 /* Something went way bad during setup */ 5630 sctp_input_with_port(m, off, 0); 5631 return; 5632 } 5633 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5634 (sizeof(struct sctp_mcore_queue)), 5635 SCTP_M_MCORE); 5636 if (qent == NULL) { 5637 /* This is trouble */ 5638 sctp_input_with_port(m, off, 0); 5639 return; 5640 } 5641 qent->vn = curvnet; 5642 qent->m = m; 5643 qent->off = off; 5644 qent->v6 = 0; 5645 wkq = &sctp_mcore_workers[cpu_to_use]; 5646 SCTP_MCORE_QLOCK(wkq); 5647 5648 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5649 if (wkq->running == 0) { 5650 need_wake = 1; 5651 } 5652 SCTP_MCORE_QUNLOCK(wkq); 5653 if (need_wake) { 5654 wakeup(&wkq->running); 5655 } 5656 } 5657 5658 static void 5659 sctp_mcore_thread(void *arg) 5660 { 5661 5662 struct sctp_mcore_ctrl *wkq; 5663 struct sctp_mcore_queue *qent; 5664 5665 wkq = (struct sctp_mcore_ctrl *)arg; 5666 struct mbuf *m; 5667 int off, v6; 5668 5669 /* Wait for first tickle */ 5670 SCTP_MCORE_LOCK(wkq); 5671 wkq->running = 0; 5672 msleep(&wkq->running, 5673 &wkq->core_mtx, 5674 0, "wait for pkt", 0); 5675 SCTP_MCORE_UNLOCK(wkq); 5676 5677 /* Bind to our cpu */ 5678 thread_lock(curthread); 5679 sched_bind(curthread, wkq->cpuid); 5680 thread_unlock(curthread); 5681 5682 /* Now lets start working */ 5683 SCTP_MCORE_LOCK(wkq); 5684 /* Now grab lock and go */ 5685 for (;;) { 5686 SCTP_MCORE_QLOCK(wkq); 5687 skip_sleep: 5688 wkq->running = 1; 5689 qent = TAILQ_FIRST(&wkq->que); 5690 if (qent) { 5691 TAILQ_REMOVE(&wkq->que, qent, next); 5692 SCTP_MCORE_QUNLOCK(wkq); 5693 CURVNET_SET(qent->vn); 5694 m = qent->m; 5695 off = qent->off; 5696 v6 = qent->v6; 5697 SCTP_FREE(qent, SCTP_M_MCORE); 5698 if (v6 == 0) { 5699 sctp_input_with_port(m, off, 0); 5700 } else { 5701 SCTP_PRINTF("V6 not yet supported\n"); 5702 sctp_m_freem(m); 5703 } 5704 CURVNET_RESTORE(); 5705 SCTP_MCORE_QLOCK(wkq); 5706 } 5707 wkq->running = 0; 5708 if (!TAILQ_EMPTY(&wkq->que)) { 5709 goto skip_sleep; 5710 } 5711 SCTP_MCORE_QUNLOCK(wkq); 5712 msleep(&wkq->running, 5713 &wkq->core_mtx, 5714 0, "wait for pkt", 0); 5715 } 5716 } 5717 5718 static void 5719 sctp_startup_mcore_threads(void) 5720 { 5721 int i, cpu; 5722 5723 if (mp_ncpus == 1) 5724 return; 5725 5726 if (sctp_mcore_workers != NULL) { 5727 /* 5728 * Already been here in some previous vnet? 5729 */ 5730 return; 5731 } 5732 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5733 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5734 SCTP_M_MCORE); 5735 if (sctp_mcore_workers == NULL) { 5736 /* TSNH I hope */ 5737 return; 5738 } 5739 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5740 sizeof(struct sctp_mcore_ctrl))); 5741 /* Init the structures */ 5742 for (i = 0; i <= mp_maxid; i++) { 5743 TAILQ_INIT(&sctp_mcore_workers[i].que); 5744 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5745 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5746 sctp_mcore_workers[i].cpuid = i; 5747 } 5748 if (sctp_cpuarry == NULL) { 5749 SCTP_MALLOC(sctp_cpuarry, int *, 5750 (mp_ncpus * sizeof(int)), 5751 SCTP_M_MCORE); 5752 i = 0; 5753 CPU_FOREACH(cpu) { 5754 sctp_cpuarry[i] = cpu; 5755 i++; 5756 } 5757 } 5758 5759 /* Now start them all */ 5760 CPU_FOREACH(cpu) { 5761 (void)kproc_create(sctp_mcore_thread, 5762 (void *)&sctp_mcore_workers[cpu], 5763 &sctp_mcore_workers[cpu].thread_proc, 5764 RFPROC, 5765 SCTP_KTHREAD_PAGES, 5766 SCTP_MCORE_NAME); 5767 5768 } 5769 } 5770 #endif 5771 5772 void 5773 sctp_pcb_init() 5774 { 5775 /* 5776 * SCTP initialization for the PCB structures should be called by 5777 * the sctp_init() function. 5778 */ 5779 int i; 5780 struct timeval tv; 5781 5782 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5783 /* error I was called twice */ 5784 return; 5785 } 5786 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5787 5788 #if defined(SCTP_LOCAL_TRACE_BUF) 5789 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5790 #endif 5791 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5792 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5793 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5794 SCTP_M_MCORE); 5795 #endif 5796 (void)SCTP_GETTIME_TIMEVAL(&tv); 5797 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5798 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5799 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5800 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5801 #else 5802 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5803 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5804 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5805 #endif 5806 /* init the empty list of (All) Endpoints */ 5807 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5808 5809 5810 /* init the hash table of endpoints */ 5811 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5812 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5813 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5814 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5815 &SCTP_BASE_INFO(hashasocmark)); 5816 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5817 &SCTP_BASE_INFO(hashmark)); 5818 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5819 &SCTP_BASE_INFO(hashtcpmark)); 5820 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5821 5822 5823 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5824 &SCTP_BASE_INFO(hashvrfmark)); 5825 5826 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5827 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5828 /* init the zones */ 5829 /* 5830 * FIX ME: Should check for NULL returns, but if it does fail we are 5831 * doomed to panic anyways... add later maybe. 5832 */ 5833 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5834 sizeof(struct sctp_inpcb), maxsockets); 5835 5836 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5837 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5838 5839 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5840 sizeof(struct sctp_laddr), 5841 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5842 5843 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5844 sizeof(struct sctp_nets), 5845 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5846 5847 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5848 sizeof(struct sctp_tmit_chunk), 5849 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5850 5851 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5852 sizeof(struct sctp_queued_to_read), 5853 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5854 5855 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5856 sizeof(struct sctp_stream_queue_pending), 5857 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5858 5859 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5860 sizeof(struct sctp_asconf), 5861 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5862 5863 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5864 sizeof(struct sctp_asconf_ack), 5865 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5866 5867 5868 /* Master Lock INIT for info structure */ 5869 SCTP_INP_INFO_LOCK_INIT(); 5870 SCTP_STATLOG_INIT_LOCK(); 5871 5872 SCTP_IPI_COUNT_INIT(); 5873 SCTP_IPI_ADDR_INIT(); 5874 #ifdef SCTP_PACKET_LOGGING 5875 SCTP_IP_PKTLOG_INIT(); 5876 #endif 5877 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5878 5879 SCTP_WQ_ADDR_INIT(); 5880 /* not sure if we need all the counts */ 5881 SCTP_BASE_INFO(ipi_count_ep) = 0; 5882 /* assoc/tcb zone info */ 5883 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5884 /* local addrlist zone info */ 5885 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5886 /* remote addrlist zone info */ 5887 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5888 /* chunk info */ 5889 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5890 5891 /* socket queue zone info */ 5892 SCTP_BASE_INFO(ipi_count_readq) = 0; 5893 5894 /* stream out queue cont */ 5895 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5896 5897 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5898 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5899 5900 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5901 5902 /* Init the TIMEWAIT list */ 5903 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5904 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5905 } 5906 sctp_startup_iterator(); 5907 5908 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5909 sctp_startup_mcore_threads(); 5910 #endif 5911 5912 /* 5913 * INIT the default VRF which for BSD is the only one, other O/S's 5914 * may have more. But initially they must start with one and then 5915 * add the VRF's as addresses are added. 5916 */ 5917 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5918 } 5919 5920 /* 5921 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5922 */ 5923 void 5924 sctp_pcb_finish(void) 5925 { 5926 struct sctp_vrflist *vrf_bucket; 5927 struct sctp_vrf *vrf, *nvrf; 5928 struct sctp_ifn *ifn, *nifn; 5929 struct sctp_ifa *ifa, *nifa; 5930 struct sctpvtaghead *chain; 5931 struct sctp_tagblock *twait_block, *prev_twait_block; 5932 struct sctp_laddr *wi, *nwi; 5933 int i; 5934 struct sctp_iterator *it, *nit; 5935 5936 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5937 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5938 return; 5939 } 5940 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5941 /* 5942 * In FreeBSD the iterator thread never exits but we do clean up. 5943 * The only way FreeBSD reaches here is if we have VRF's but we 5944 * still add the ifdef to make it compile on old versions. 5945 */ 5946 retry: 5947 SCTP_IPI_ITERATOR_WQ_LOCK(); 5948 /* 5949 * sctp_iterator_worker() might be working on an it entry without 5950 * holding the lock. We won't find it on the list either and 5951 * continue and free/destroy it. While holding the lock, spin, to 5952 * avoid the race condition as sctp_iterator_worker() will have to 5953 * wait to re-aquire the lock. 5954 */ 5955 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5956 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5957 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5958 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5959 DELAY(10); 5960 goto retry; 5961 } 5962 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5963 if (it->vn != curvnet) { 5964 continue; 5965 } 5966 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5967 if (it->function_atend != NULL) { 5968 (*it->function_atend) (it->pointer, it->val); 5969 } 5970 SCTP_FREE(it, SCTP_M_ITER); 5971 } 5972 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5973 SCTP_ITERATOR_LOCK(); 5974 if ((sctp_it_ctl.cur_it) && 5975 (sctp_it_ctl.cur_it->vn == curvnet)) { 5976 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5977 } 5978 SCTP_ITERATOR_UNLOCK(); 5979 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5980 SCTP_WQ_ADDR_LOCK(); 5981 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5982 LIST_REMOVE(wi, sctp_nxt_addr); 5983 SCTP_DECR_LADDR_COUNT(); 5984 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5985 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5986 } 5987 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5988 } 5989 SCTP_WQ_ADDR_UNLOCK(); 5990 5991 /* 5992 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5993 * destroyed first). 5994 */ 5995 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5996 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5997 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5998 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5999 /* free the ifa */ 6000 LIST_REMOVE(ifa, next_bucket); 6001 LIST_REMOVE(ifa, next_ifa); 6002 SCTP_FREE(ifa, SCTP_M_IFA); 6003 } 6004 /* free the ifn */ 6005 LIST_REMOVE(ifn, next_bucket); 6006 LIST_REMOVE(ifn, next_ifn); 6007 SCTP_FREE(ifn, SCTP_M_IFN); 6008 } 6009 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 6010 /* free the vrf */ 6011 LIST_REMOVE(vrf, next_vrf); 6012 SCTP_FREE(vrf, SCTP_M_VRF); 6013 } 6014 /* free the vrf hashes */ 6015 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6016 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6017 6018 /* 6019 * free the TIMEWAIT list elements malloc'd in the function 6020 * sctp_add_vtag_to_timewait()... 6021 */ 6022 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6023 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6024 if (!LIST_EMPTY(chain)) { 6025 prev_twait_block = NULL; 6026 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6027 if (prev_twait_block) { 6028 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6029 } 6030 prev_twait_block = twait_block; 6031 } 6032 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6033 } 6034 } 6035 6036 /* free the locks and mutexes */ 6037 #ifdef SCTP_PACKET_LOGGING 6038 SCTP_IP_PKTLOG_DESTROY(); 6039 #endif 6040 SCTP_IPI_ADDR_DESTROY(); 6041 SCTP_STATLOG_DESTROY(); 6042 SCTP_INP_INFO_LOCK_DESTROY(); 6043 6044 SCTP_WQ_ADDR_DESTROY(); 6045 6046 /* Get rid of other stuff too. */ 6047 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6048 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6049 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6050 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6051 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6052 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6053 6054 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6055 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6056 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6057 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6058 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6059 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6060 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6061 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6062 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6063 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6064 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6065 #endif 6066 } 6067 6068 6069 int 6070 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6071 int offset, int limit, 6072 struct sockaddr *src, struct sockaddr *dst, 6073 struct sockaddr *altsa, uint16_t port) 6074 { 6075 /* 6076 * grub through the INIT pulling addresses and loading them to the 6077 * nets structure in the asoc. The from address in the mbuf should 6078 * also be loaded (if it is not already). This routine can be called 6079 * with either INIT or INIT-ACK's as long as the m points to the IP 6080 * packet and the offset points to the beginning of the parameters. 6081 */ 6082 struct sctp_inpcb *inp; 6083 struct sctp_nets *net, *nnet, *net_tmp; 6084 struct sctp_paramhdr *phdr, param_buf; 6085 struct sctp_tcb *stcb_tmp; 6086 uint16_t ptype, plen; 6087 struct sockaddr *sa; 6088 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6089 struct sctp_auth_random *p_random = NULL; 6090 uint16_t random_len = 0; 6091 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6092 struct sctp_auth_hmac_algo *hmacs = NULL; 6093 uint16_t hmacs_len = 0; 6094 uint8_t saw_asconf = 0; 6095 uint8_t saw_asconf_ack = 0; 6096 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6097 struct sctp_auth_chunk_list *chunks = NULL; 6098 uint16_t num_chunks = 0; 6099 sctp_key_t *new_key; 6100 uint32_t keylen; 6101 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6102 uint8_t peer_supports_ecn; 6103 uint8_t peer_supports_prsctp; 6104 uint8_t peer_supports_auth; 6105 uint8_t peer_supports_asconf; 6106 uint8_t peer_supports_asconf_ack; 6107 uint8_t peer_supports_reconfig; 6108 uint8_t peer_supports_nrsack; 6109 uint8_t peer_supports_pktdrop; 6110 uint8_t peer_supports_idata; 6111 #ifdef INET 6112 struct sockaddr_in sin; 6113 #endif 6114 #ifdef INET6 6115 struct sockaddr_in6 sin6; 6116 #endif 6117 6118 /* First get the destination address setup too. */ 6119 #ifdef INET 6120 memset(&sin, 0, sizeof(sin)); 6121 sin.sin_family = AF_INET; 6122 sin.sin_len = sizeof(sin); 6123 sin.sin_port = stcb->rport; 6124 #endif 6125 #ifdef INET6 6126 memset(&sin6, 0, sizeof(sin6)); 6127 sin6.sin6_family = AF_INET6; 6128 sin6.sin6_len = sizeof(struct sockaddr_in6); 6129 sin6.sin6_port = stcb->rport; 6130 #endif 6131 if (altsa) { 6132 sa = altsa; 6133 } else { 6134 sa = src; 6135 } 6136 peer_supports_idata = 0; 6137 peer_supports_ecn = 0; 6138 peer_supports_prsctp = 0; 6139 peer_supports_auth = 0; 6140 peer_supports_asconf = 0; 6141 peer_supports_reconfig = 0; 6142 peer_supports_nrsack = 0; 6143 peer_supports_pktdrop = 0; 6144 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6145 /* mark all addresses that we have currently on the list */ 6146 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6147 } 6148 /* does the source address already exist? if so skip it */ 6149 inp = stcb->sctp_ep; 6150 atomic_add_int(&stcb->asoc.refcnt, 1); 6151 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6152 atomic_add_int(&stcb->asoc.refcnt, -1); 6153 6154 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6155 /* we must add the source address */ 6156 /* no scope set here since we have a tcb already. */ 6157 switch (sa->sa_family) { 6158 #ifdef INET 6159 case AF_INET: 6160 if (stcb->asoc.scope.ipv4_addr_legal) { 6161 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6162 return (-1); 6163 } 6164 } 6165 break; 6166 #endif 6167 #ifdef INET6 6168 case AF_INET6: 6169 if (stcb->asoc.scope.ipv6_addr_legal) { 6170 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6171 return (-2); 6172 } 6173 } 6174 break; 6175 #endif 6176 default: 6177 break; 6178 } 6179 } else { 6180 if (net_tmp != NULL && stcb_tmp == stcb) { 6181 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6182 } else if (stcb_tmp != stcb) { 6183 /* It belongs to another association? */ 6184 if (stcb_tmp) 6185 SCTP_TCB_UNLOCK(stcb_tmp); 6186 return (-3); 6187 } 6188 } 6189 if (stcb->asoc.state == 0) { 6190 /* the assoc was freed? */ 6191 return (-4); 6192 } 6193 /* now we must go through each of the params. */ 6194 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6195 while (phdr) { 6196 ptype = ntohs(phdr->param_type); 6197 plen = ntohs(phdr->param_length); 6198 /* 6199 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6200 * (uint32_t)ptype, (int)plen); 6201 */ 6202 if (offset + plen > limit) { 6203 break; 6204 } 6205 if (plen == 0) { 6206 break; 6207 } 6208 #ifdef INET 6209 if (ptype == SCTP_IPV4_ADDRESS) { 6210 if (stcb->asoc.scope.ipv4_addr_legal) { 6211 struct sctp_ipv4addr_param *p4, p4_buf; 6212 6213 /* ok get the v4 address and check/add */ 6214 phdr = sctp_get_next_param(m, offset, 6215 (struct sctp_paramhdr *)&p4_buf, 6216 sizeof(p4_buf)); 6217 if (plen != sizeof(struct sctp_ipv4addr_param) || 6218 phdr == NULL) { 6219 return (-5); 6220 } 6221 p4 = (struct sctp_ipv4addr_param *)phdr; 6222 sin.sin_addr.s_addr = p4->addr; 6223 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6224 /* Skip multi-cast addresses */ 6225 goto next_param; 6226 } 6227 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6228 (sin.sin_addr.s_addr == INADDR_ANY)) { 6229 goto next_param; 6230 } 6231 sa = (struct sockaddr *)&sin; 6232 inp = stcb->sctp_ep; 6233 atomic_add_int(&stcb->asoc.refcnt, 1); 6234 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6235 dst, stcb); 6236 atomic_add_int(&stcb->asoc.refcnt, -1); 6237 6238 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6239 inp == NULL) { 6240 /* we must add the source address */ 6241 /* 6242 * no scope set since we have a tcb 6243 * already 6244 */ 6245 6246 /* 6247 * we must validate the state again 6248 * here 6249 */ 6250 add_it_now: 6251 if (stcb->asoc.state == 0) { 6252 /* the assoc was freed? */ 6253 return (-7); 6254 } 6255 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6256 return (-8); 6257 } 6258 } else if (stcb_tmp == stcb) { 6259 if (stcb->asoc.state == 0) { 6260 /* the assoc was freed? */ 6261 return (-10); 6262 } 6263 if (net != NULL) { 6264 /* clear flag */ 6265 net->dest_state &= 6266 ~SCTP_ADDR_NOT_IN_ASSOC; 6267 } 6268 } else { 6269 /* 6270 * strange, address is in another 6271 * assoc? straighten out locks. 6272 */ 6273 if (stcb_tmp) { 6274 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6275 struct mbuf *op_err; 6276 char msg[SCTP_DIAG_INFO_LEN]; 6277 6278 /* 6279 * in setup state we 6280 * abort this guy 6281 */ 6282 snprintf(msg, sizeof(msg), 6283 "%s:%d at %s", __FILE__, __LINE__, __func__); 6284 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6285 msg); 6286 sctp_abort_an_association(stcb_tmp->sctp_ep, 6287 stcb_tmp, op_err, 6288 SCTP_SO_NOT_LOCKED); 6289 goto add_it_now; 6290 } 6291 SCTP_TCB_UNLOCK(stcb_tmp); 6292 } 6293 6294 if (stcb->asoc.state == 0) { 6295 /* the assoc was freed? */ 6296 return (-12); 6297 } 6298 return (-13); 6299 } 6300 } 6301 } else 6302 #endif 6303 #ifdef INET6 6304 if (ptype == SCTP_IPV6_ADDRESS) { 6305 if (stcb->asoc.scope.ipv6_addr_legal) { 6306 /* ok get the v6 address and check/add */ 6307 struct sctp_ipv6addr_param *p6, p6_buf; 6308 6309 phdr = sctp_get_next_param(m, offset, 6310 (struct sctp_paramhdr *)&p6_buf, 6311 sizeof(p6_buf)); 6312 if (plen != sizeof(struct sctp_ipv6addr_param) || 6313 phdr == NULL) { 6314 return (-14); 6315 } 6316 p6 = (struct sctp_ipv6addr_param *)phdr; 6317 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6318 sizeof(p6->addr)); 6319 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6320 /* Skip multi-cast addresses */ 6321 goto next_param; 6322 } 6323 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6324 /* 6325 * Link local make no sense without 6326 * scope 6327 */ 6328 goto next_param; 6329 } 6330 sa = (struct sockaddr *)&sin6; 6331 inp = stcb->sctp_ep; 6332 atomic_add_int(&stcb->asoc.refcnt, 1); 6333 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6334 dst, stcb); 6335 atomic_add_int(&stcb->asoc.refcnt, -1); 6336 if (stcb_tmp == NULL && 6337 (inp == stcb->sctp_ep || inp == NULL)) { 6338 /* 6339 * we must validate the state again 6340 * here 6341 */ 6342 add_it_now6: 6343 if (stcb->asoc.state == 0) { 6344 /* the assoc was freed? */ 6345 return (-16); 6346 } 6347 /* 6348 * we must add the address, no scope 6349 * set 6350 */ 6351 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6352 return (-17); 6353 } 6354 } else if (stcb_tmp == stcb) { 6355 /* 6356 * we must validate the state again 6357 * here 6358 */ 6359 if (stcb->asoc.state == 0) { 6360 /* the assoc was freed? */ 6361 return (-19); 6362 } 6363 if (net != NULL) { 6364 /* clear flag */ 6365 net->dest_state &= 6366 ~SCTP_ADDR_NOT_IN_ASSOC; 6367 } 6368 } else { 6369 /* 6370 * strange, address is in another 6371 * assoc? straighten out locks. 6372 */ 6373 if (stcb_tmp) { 6374 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6375 struct mbuf *op_err; 6376 char msg[SCTP_DIAG_INFO_LEN]; 6377 6378 /* 6379 * in setup state we 6380 * abort this guy 6381 */ 6382 snprintf(msg, sizeof(msg), 6383 "%s:%d at %s", __FILE__, __LINE__, __func__); 6384 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6385 msg); 6386 sctp_abort_an_association(stcb_tmp->sctp_ep, 6387 stcb_tmp, op_err, 6388 SCTP_SO_NOT_LOCKED); 6389 goto add_it_now6; 6390 } 6391 SCTP_TCB_UNLOCK(stcb_tmp); 6392 } 6393 if (stcb->asoc.state == 0) { 6394 /* the assoc was freed? */ 6395 return (-21); 6396 } 6397 return (-22); 6398 } 6399 } 6400 } else 6401 #endif 6402 if (ptype == SCTP_ECN_CAPABLE) { 6403 peer_supports_ecn = 1; 6404 } else if (ptype == SCTP_ULP_ADAPTATION) { 6405 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6406 struct sctp_adaptation_layer_indication ai, 6407 *aip; 6408 6409 phdr = sctp_get_next_param(m, offset, 6410 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6411 aip = (struct sctp_adaptation_layer_indication *)phdr; 6412 if (aip) { 6413 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6414 stcb->asoc.adaptation_needed = 1; 6415 } 6416 } 6417 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6418 struct sctp_asconf_addr_param lstore, *fee; 6419 int lptype; 6420 struct sockaddr *lsa = NULL; 6421 #ifdef INET 6422 struct sctp_asconf_addrv4_param *fii; 6423 #endif 6424 6425 if (stcb->asoc.asconf_supported == 0) { 6426 return (-100); 6427 } 6428 if (plen > sizeof(lstore)) { 6429 return (-23); 6430 } 6431 phdr = sctp_get_next_param(m, offset, 6432 (struct sctp_paramhdr *)&lstore, 6433 plen); 6434 if (phdr == NULL) { 6435 return (-24); 6436 } 6437 fee = (struct sctp_asconf_addr_param *)phdr; 6438 lptype = ntohs(fee->addrp.ph.param_type); 6439 switch (lptype) { 6440 #ifdef INET 6441 case SCTP_IPV4_ADDRESS: 6442 if (plen != 6443 sizeof(struct sctp_asconf_addrv4_param)) { 6444 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6445 (int)sizeof(struct sctp_asconf_addrv4_param), 6446 plen); 6447 } else { 6448 fii = (struct sctp_asconf_addrv4_param *)fee; 6449 sin.sin_addr.s_addr = fii->addrp.addr; 6450 lsa = (struct sockaddr *)&sin; 6451 } 6452 break; 6453 #endif 6454 #ifdef INET6 6455 case SCTP_IPV6_ADDRESS: 6456 if (plen != 6457 sizeof(struct sctp_asconf_addr_param)) { 6458 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6459 (int)sizeof(struct sctp_asconf_addr_param), 6460 plen); 6461 } else { 6462 memcpy(sin6.sin6_addr.s6_addr, 6463 fee->addrp.addr, 6464 sizeof(fee->addrp.addr)); 6465 lsa = (struct sockaddr *)&sin6; 6466 } 6467 break; 6468 #endif 6469 default: 6470 break; 6471 } 6472 if (lsa) { 6473 (void)sctp_set_primary_addr(stcb, sa, NULL); 6474 } 6475 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6476 stcb->asoc.peer_supports_nat = 1; 6477 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6478 /* Peer supports pr-sctp */ 6479 peer_supports_prsctp = 1; 6480 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6481 /* A supported extension chunk */ 6482 struct sctp_supported_chunk_types_param *pr_supported; 6483 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6484 int num_ent, i; 6485 6486 if (plen > sizeof(local_store)) { 6487 return (-35); 6488 } 6489 phdr = sctp_get_next_param(m, offset, 6490 (struct sctp_paramhdr *)&local_store, plen); 6491 if (phdr == NULL) { 6492 return (-25); 6493 } 6494 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6495 num_ent = plen - sizeof(struct sctp_paramhdr); 6496 for (i = 0; i < num_ent; i++) { 6497 switch (pr_supported->chunk_types[i]) { 6498 case SCTP_ASCONF: 6499 peer_supports_asconf = 1; 6500 break; 6501 case SCTP_ASCONF_ACK: 6502 peer_supports_asconf_ack = 1; 6503 break; 6504 case SCTP_FORWARD_CUM_TSN: 6505 peer_supports_prsctp = 1; 6506 break; 6507 case SCTP_PACKET_DROPPED: 6508 peer_supports_pktdrop = 1; 6509 break; 6510 case SCTP_NR_SELECTIVE_ACK: 6511 peer_supports_nrsack = 1; 6512 break; 6513 case SCTP_STREAM_RESET: 6514 peer_supports_reconfig = 1; 6515 break; 6516 case SCTP_AUTHENTICATION: 6517 peer_supports_auth = 1; 6518 break; 6519 case SCTP_IDATA: 6520 peer_supports_idata = 1; 6521 break; 6522 default: 6523 /* one I have not learned yet */ 6524 break; 6525 6526 } 6527 } 6528 } else if (ptype == SCTP_RANDOM) { 6529 if (plen > sizeof(random_store)) 6530 break; 6531 if (got_random) { 6532 /* already processed a RANDOM */ 6533 goto next_param; 6534 } 6535 phdr = sctp_get_next_param(m, offset, 6536 (struct sctp_paramhdr *)random_store, 6537 plen); 6538 if (phdr == NULL) 6539 return (-26); 6540 p_random = (struct sctp_auth_random *)phdr; 6541 random_len = plen - sizeof(*p_random); 6542 /* enforce the random length */ 6543 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6544 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6545 return (-27); 6546 } 6547 got_random = 1; 6548 } else if (ptype == SCTP_HMAC_LIST) { 6549 uint16_t num_hmacs; 6550 uint16_t i; 6551 6552 if (plen > sizeof(hmacs_store)) 6553 break; 6554 if (got_hmacs) { 6555 /* already processed a HMAC list */ 6556 goto next_param; 6557 } 6558 phdr = sctp_get_next_param(m, offset, 6559 (struct sctp_paramhdr *)hmacs_store, 6560 plen); 6561 if (phdr == NULL) 6562 return (-28); 6563 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6564 hmacs_len = plen - sizeof(*hmacs); 6565 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6566 /* validate the hmac list */ 6567 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6568 return (-29); 6569 } 6570 if (stcb->asoc.peer_hmacs != NULL) 6571 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6572 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6573 if (stcb->asoc.peer_hmacs != NULL) { 6574 for (i = 0; i < num_hmacs; i++) { 6575 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6576 ntohs(hmacs->hmac_ids[i])); 6577 } 6578 } 6579 got_hmacs = 1; 6580 } else if (ptype == SCTP_CHUNK_LIST) { 6581 int i; 6582 6583 if (plen > sizeof(chunks_store)) 6584 break; 6585 if (got_chklist) { 6586 /* already processed a Chunks list */ 6587 goto next_param; 6588 } 6589 phdr = sctp_get_next_param(m, offset, 6590 (struct sctp_paramhdr *)chunks_store, 6591 plen); 6592 if (phdr == NULL) 6593 return (-30); 6594 chunks = (struct sctp_auth_chunk_list *)phdr; 6595 num_chunks = plen - sizeof(*chunks); 6596 if (stcb->asoc.peer_auth_chunks != NULL) 6597 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6598 else 6599 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6600 for (i = 0; i < num_chunks; i++) { 6601 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6602 stcb->asoc.peer_auth_chunks); 6603 /* record asconf/asconf-ack if listed */ 6604 if (chunks->chunk_types[i] == SCTP_ASCONF) 6605 saw_asconf = 1; 6606 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6607 saw_asconf_ack = 1; 6608 6609 } 6610 got_chklist = 1; 6611 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6612 (ptype == SCTP_STATE_COOKIE) || 6613 (ptype == SCTP_UNRECOG_PARAM) || 6614 (ptype == SCTP_COOKIE_PRESERVE) || 6615 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6616 (ptype == SCTP_ADD_IP_ADDRESS) || 6617 (ptype == SCTP_DEL_IP_ADDRESS) || 6618 (ptype == SCTP_ERROR_CAUSE_IND) || 6619 (ptype == SCTP_SUCCESS_REPORT)) { 6620 /* don't care */ ; 6621 } else { 6622 if ((ptype & 0x8000) == 0x0000) { 6623 /* 6624 * must stop processing the rest of the 6625 * param's. Any report bits were handled 6626 * with the call to 6627 * sctp_arethere_unrecognized_parameters() 6628 * when the INIT or INIT-ACK was first seen. 6629 */ 6630 break; 6631 } 6632 } 6633 6634 next_param: 6635 offset += SCTP_SIZE32(plen); 6636 if (offset >= limit) { 6637 break; 6638 } 6639 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6640 sizeof(param_buf)); 6641 } 6642 /* Now check to see if we need to purge any addresses */ 6643 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6644 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6645 SCTP_ADDR_NOT_IN_ASSOC) { 6646 /* This address has been removed from the asoc */ 6647 /* remove and free it */ 6648 stcb->asoc.numnets--; 6649 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6650 sctp_free_remote_addr(net); 6651 if (net == stcb->asoc.primary_destination) { 6652 stcb->asoc.primary_destination = NULL; 6653 sctp_select_primary_destination(stcb); 6654 } 6655 } 6656 } 6657 if ((stcb->asoc.ecn_supported == 1) && 6658 (peer_supports_ecn == 0)) { 6659 stcb->asoc.ecn_supported = 0; 6660 } 6661 if ((stcb->asoc.prsctp_supported == 1) && 6662 (peer_supports_prsctp == 0)) { 6663 stcb->asoc.prsctp_supported = 0; 6664 } 6665 if ((stcb->asoc.auth_supported == 1) && 6666 ((peer_supports_auth == 0) || 6667 (got_random == 0) || (got_hmacs == 0))) { 6668 stcb->asoc.auth_supported = 0; 6669 } 6670 if ((stcb->asoc.asconf_supported == 1) && 6671 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6672 (stcb->asoc.auth_supported == 0) || 6673 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6674 stcb->asoc.asconf_supported = 0; 6675 } 6676 if ((stcb->asoc.reconfig_supported == 1) && 6677 (peer_supports_reconfig == 0)) { 6678 stcb->asoc.reconfig_supported = 0; 6679 } 6680 if ((stcb->asoc.idata_supported == 1) && 6681 (peer_supports_idata == 0)) { 6682 stcb->asoc.idata_supported = 0; 6683 } 6684 if ((stcb->asoc.nrsack_supported == 1) && 6685 (peer_supports_nrsack == 0)) { 6686 stcb->asoc.nrsack_supported = 0; 6687 } 6688 if ((stcb->asoc.pktdrop_supported == 1) && 6689 (peer_supports_pktdrop == 0)) { 6690 stcb->asoc.pktdrop_supported = 0; 6691 } 6692 /* validate authentication required parameters */ 6693 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6694 /* peer does not support auth but sent a chunks list? */ 6695 return (-31); 6696 } 6697 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6698 /* peer supports asconf but not auth? */ 6699 return (-32); 6700 } else if ((peer_supports_asconf == 1) && 6701 (peer_supports_auth == 1) && 6702 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6703 return (-33); 6704 } 6705 /* concatenate the full random key */ 6706 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6707 if (chunks != NULL) { 6708 keylen += sizeof(*chunks) + num_chunks; 6709 } 6710 new_key = sctp_alloc_key(keylen); 6711 if (new_key != NULL) { 6712 /* copy in the RANDOM */ 6713 if (p_random != NULL) { 6714 keylen = sizeof(*p_random) + random_len; 6715 memcpy(new_key->key, p_random, keylen); 6716 } else { 6717 keylen = 0; 6718 } 6719 /* append in the AUTH chunks */ 6720 if (chunks != NULL) { 6721 memcpy(new_key->key + keylen, chunks, 6722 sizeof(*chunks) + num_chunks); 6723 keylen += sizeof(*chunks) + num_chunks; 6724 } 6725 /* append in the HMACs */ 6726 if (hmacs != NULL) { 6727 memcpy(new_key->key + keylen, hmacs, 6728 sizeof(*hmacs) + hmacs_len); 6729 } 6730 } else { 6731 /* failed to get memory for the key */ 6732 return (-34); 6733 } 6734 if (stcb->asoc.authinfo.peer_random != NULL) 6735 sctp_free_key(stcb->asoc.authinfo.peer_random); 6736 stcb->asoc.authinfo.peer_random = new_key; 6737 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6738 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6739 6740 return (0); 6741 } 6742 6743 int 6744 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6745 struct sctp_nets *net) 6746 { 6747 /* make sure the requested primary address exists in the assoc */ 6748 if (net == NULL && sa) 6749 net = sctp_findnet(stcb, sa); 6750 6751 if (net == NULL) { 6752 /* didn't find the requested primary address! */ 6753 return (-1); 6754 } else { 6755 /* set the primary address */ 6756 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6757 /* Must be confirmed, so queue to set */ 6758 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6759 return (0); 6760 } 6761 stcb->asoc.primary_destination = net; 6762 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6763 sctp_free_remote_addr(stcb->asoc.alternate); 6764 stcb->asoc.alternate = NULL; 6765 } 6766 net = TAILQ_FIRST(&stcb->asoc.nets); 6767 if (net != stcb->asoc.primary_destination) { 6768 /* 6769 * first one on the list is NOT the primary 6770 * sctp_cmpaddr() is much more efficient if the 6771 * primary is the first on the list, make it so. 6772 */ 6773 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6774 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6775 } 6776 return (0); 6777 } 6778 } 6779 6780 int 6781 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6782 { 6783 /* 6784 * This function serves two purposes. It will see if a TAG can be 6785 * re-used and return 1 for yes it is ok and 0 for don't use that 6786 * tag. A secondary function it will do is purge out old tags that 6787 * can be removed. 6788 */ 6789 struct sctpvtaghead *chain; 6790 struct sctp_tagblock *twait_block; 6791 struct sctpasochead *head; 6792 struct sctp_tcb *stcb; 6793 int i; 6794 6795 SCTP_INP_INFO_RLOCK(); 6796 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6797 SCTP_BASE_INFO(hashasocmark))]; 6798 LIST_FOREACH(stcb, head, sctp_asocs) { 6799 /* 6800 * We choose not to lock anything here. TCB's can't be 6801 * removed since we have the read lock, so they can't be 6802 * freed on us, same thing for the INP. I may be wrong with 6803 * this assumption, but we will go with it for now :-) 6804 */ 6805 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6806 continue; 6807 } 6808 if (stcb->asoc.my_vtag == tag) { 6809 /* candidate */ 6810 if (stcb->rport != rport) { 6811 continue; 6812 } 6813 if (stcb->sctp_ep->sctp_lport != lport) { 6814 continue; 6815 } 6816 /* Its a used tag set */ 6817 SCTP_INP_INFO_RUNLOCK(); 6818 return (0); 6819 } 6820 } 6821 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6822 /* Now what about timed wait ? */ 6823 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6824 /* 6825 * Block(s) are present, lets see if we have this tag in the 6826 * list 6827 */ 6828 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6829 if (twait_block->vtag_block[i].v_tag == 0) { 6830 /* not used */ 6831 continue; 6832 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6833 now->tv_sec) { 6834 /* Audit expires this guy */ 6835 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6836 twait_block->vtag_block[i].v_tag = 0; 6837 twait_block->vtag_block[i].lport = 0; 6838 twait_block->vtag_block[i].rport = 0; 6839 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6840 (twait_block->vtag_block[i].lport == lport) && 6841 (twait_block->vtag_block[i].rport == rport)) { 6842 /* Bad tag, sorry :< */ 6843 SCTP_INP_INFO_RUNLOCK(); 6844 return (0); 6845 } 6846 } 6847 } 6848 SCTP_INP_INFO_RUNLOCK(); 6849 return (1); 6850 } 6851 6852 static void 6853 sctp_drain_mbufs(struct sctp_tcb *stcb) 6854 { 6855 /* 6856 * We must hunt this association for MBUF's past the cumack (i.e. 6857 * out of order data that we can renege on). 6858 */ 6859 struct sctp_association *asoc; 6860 struct sctp_tmit_chunk *chk, *nchk; 6861 uint32_t cumulative_tsn_p1; 6862 struct sctp_queued_to_read *control, *ncontrol; 6863 int cnt, strmat; 6864 uint32_t gap, i; 6865 int fnd = 0; 6866 6867 /* We look for anything larger than the cum-ack + 1 */ 6868 6869 asoc = &stcb->asoc; 6870 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6871 /* none we can reneg on. */ 6872 return; 6873 } 6874 SCTP_STAT_INCR(sctps_protocol_drains_done); 6875 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6876 cnt = 0; 6877 /* Ok that was fun, now we will drain all the inbound streams? */ 6878 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6879 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6880 #ifdef INVARIANTS 6881 if (control->on_strm_q != SCTP_ON_ORDERED) { 6882 panic("Huh control: %p on_q: %d -- not ordered?", 6883 control, control->on_strm_q); 6884 } 6885 #endif 6886 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6887 /* Yep it is above cum-ack */ 6888 cnt++; 6889 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6890 KASSERT(control->length > 0, ("control has zero length")); 6891 if (asoc->size_on_all_streams >= control->length) { 6892 asoc->size_on_all_streams -= control->length; 6893 } else { 6894 #ifdef INVARIANTS 6895 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6896 #else 6897 asoc->size_on_all_streams = 0; 6898 #endif 6899 } 6900 sctp_ucount_decr(asoc->cnt_on_all_streams); 6901 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6902 if (control->on_read_q) { 6903 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6904 control->on_read_q = 0; 6905 } 6906 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6907 control->on_strm_q = 0; 6908 if (control->data) { 6909 sctp_m_freem(control->data); 6910 control->data = NULL; 6911 } 6912 sctp_free_remote_addr(control->whoFrom); 6913 /* Now its reasm? */ 6914 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6915 cnt++; 6916 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6917 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6918 if (asoc->size_on_reasm_queue >= chk->send_size) { 6919 asoc->size_on_reasm_queue -= chk->send_size; 6920 } else { 6921 #ifdef INVARIANTS 6922 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6923 #else 6924 asoc->size_on_reasm_queue = 0; 6925 #endif 6926 } 6927 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6928 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6929 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6930 if (chk->data) { 6931 sctp_m_freem(chk->data); 6932 chk->data = NULL; 6933 } 6934 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6935 } 6936 sctp_free_a_readq(stcb, control); 6937 } 6938 } 6939 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6940 #ifdef INVARIANTS 6941 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6942 panic("Huh control: %p on_q: %d -- not unordered?", 6943 control, control->on_strm_q); 6944 } 6945 #endif 6946 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6947 /* Yep it is above cum-ack */ 6948 cnt++; 6949 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6950 KASSERT(control->length > 0, ("control has zero length")); 6951 if (asoc->size_on_all_streams >= control->length) { 6952 asoc->size_on_all_streams -= control->length; 6953 } else { 6954 #ifdef INVARIANTS 6955 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6956 #else 6957 asoc->size_on_all_streams = 0; 6958 #endif 6959 } 6960 sctp_ucount_decr(asoc->cnt_on_all_streams); 6961 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6962 if (control->on_read_q) { 6963 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6964 control->on_read_q = 0; 6965 } 6966 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6967 control->on_strm_q = 0; 6968 if (control->data) { 6969 sctp_m_freem(control->data); 6970 control->data = NULL; 6971 } 6972 sctp_free_remote_addr(control->whoFrom); 6973 /* Now its reasm? */ 6974 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6975 cnt++; 6976 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6977 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6978 if (asoc->size_on_reasm_queue >= chk->send_size) { 6979 asoc->size_on_reasm_queue -= chk->send_size; 6980 } else { 6981 #ifdef INVARIANTS 6982 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6983 #else 6984 asoc->size_on_reasm_queue = 0; 6985 #endif 6986 } 6987 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6988 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6989 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6990 if (chk->data) { 6991 sctp_m_freem(chk->data); 6992 chk->data = NULL; 6993 } 6994 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6995 } 6996 sctp_free_a_readq(stcb, control); 6997 } 6998 } 6999 } 7000 if (cnt) { 7001 /* We must back down to see what the new highest is */ 7002 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 7003 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 7004 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 7005 asoc->highest_tsn_inside_map = i; 7006 fnd = 1; 7007 break; 7008 } 7009 } 7010 if (!fnd) { 7011 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 7012 } 7013 7014 /* 7015 * Question, should we go through the delivery queue? The 7016 * only reason things are on here is the app not reading OR 7017 * a p-d-api up. An attacker COULD send enough in to 7018 * initiate the PD-API and then send a bunch of stuff to 7019 * other streams... these would wind up on the delivery 7020 * queue.. and then we would not get to them. But in order 7021 * to do this I then have to back-track and un-deliver 7022 * sequence numbers in streams.. el-yucko. I think for now 7023 * we will NOT look at the delivery queue and leave it to be 7024 * something to consider later. An alternative would be to 7025 * abort the P-D-API with a notification and then deliver 7026 * the data.... Or another method might be to keep track of 7027 * how many times the situation occurs and if we see a 7028 * possible attack underway just abort the association. 7029 */ 7030 #ifdef SCTP_DEBUG 7031 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 7032 #endif 7033 /* 7034 * Now do we need to find a new 7035 * asoc->highest_tsn_inside_map? 7036 */ 7037 asoc->last_revoke_count = cnt; 7038 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 7039 /* sa_ignore NO_NULL_CHK */ 7040 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 7041 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 7042 } 7043 /* 7044 * Another issue, in un-setting the TSN's in the mapping array we 7045 * DID NOT adjust the highest_tsn marker. This will cause one of 7046 * two things to occur. It may cause us to do extra work in checking 7047 * for our mapping array movement. More importantly it may cause us 7048 * to SACK every datagram. This may not be a bad thing though since 7049 * we will recover once we get our cum-ack above and all this stuff 7050 * we dumped recovered. 7051 */ 7052 } 7053 7054 void 7055 sctp_drain() 7056 { 7057 /* 7058 * We must walk the PCB lists for ALL associations here. The system 7059 * is LOW on MBUF's and needs help. This is where reneging will 7060 * occur. We really hope this does NOT happen! 7061 */ 7062 VNET_ITERATOR_DECL(vnet_iter); 7063 VNET_LIST_RLOCK_NOSLEEP(); 7064 VNET_FOREACH(vnet_iter) { 7065 CURVNET_SET(vnet_iter); 7066 struct sctp_inpcb *inp; 7067 struct sctp_tcb *stcb; 7068 7069 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7070 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7071 #ifdef VIMAGE 7072 continue; 7073 #else 7074 return; 7075 #endif 7076 } 7077 SCTP_INP_INFO_RLOCK(); 7078 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7079 /* For each endpoint */ 7080 SCTP_INP_RLOCK(inp); 7081 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7082 /* For each association */ 7083 SCTP_TCB_LOCK(stcb); 7084 sctp_drain_mbufs(stcb); 7085 SCTP_TCB_UNLOCK(stcb); 7086 } 7087 SCTP_INP_RUNLOCK(inp); 7088 } 7089 SCTP_INP_INFO_RUNLOCK(); 7090 CURVNET_RESTORE(); 7091 } 7092 VNET_LIST_RUNLOCK_NOSLEEP(); 7093 } 7094 7095 /* 7096 * start a new iterator 7097 * iterates through all endpoints and associations based on the pcb_state 7098 * flags and asoc_state. "af" (mandatory) is executed for all matching 7099 * assocs and "ef" (optional) is executed when the iterator completes. 7100 * "inpf" (optional) is executed for each new endpoint as it is being 7101 * iterated through. inpe (optional) is called when the inp completes 7102 * its way through all the stcbs. 7103 */ 7104 int 7105 sctp_initiate_iterator(inp_func inpf, 7106 asoc_func af, 7107 inp_func inpe, 7108 uint32_t pcb_state, 7109 uint32_t pcb_features, 7110 uint32_t asoc_state, 7111 void *argp, 7112 uint32_t argi, 7113 end_func ef, 7114 struct sctp_inpcb *s_inp, 7115 uint8_t chunk_output_off) 7116 { 7117 struct sctp_iterator *it = NULL; 7118 7119 if (af == NULL) { 7120 return (-1); 7121 } 7122 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7123 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7124 SCTP_BASE_VAR(sctp_pcb_initialized)); 7125 return (-1); 7126 } 7127 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7128 SCTP_M_ITER); 7129 if (it == NULL) { 7130 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7131 return (ENOMEM); 7132 } 7133 memset(it, 0, sizeof(*it)); 7134 it->function_assoc = af; 7135 it->function_inp = inpf; 7136 if (inpf) 7137 it->done_current_ep = 0; 7138 else 7139 it->done_current_ep = 1; 7140 it->function_atend = ef; 7141 it->pointer = argp; 7142 it->val = argi; 7143 it->pcb_flags = pcb_state; 7144 it->pcb_features = pcb_features; 7145 it->asoc_state = asoc_state; 7146 it->function_inp_end = inpe; 7147 it->no_chunk_output = chunk_output_off; 7148 it->vn = curvnet; 7149 if (s_inp) { 7150 /* Assume lock is held here */ 7151 it->inp = s_inp; 7152 SCTP_INP_INCR_REF(it->inp); 7153 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7154 } else { 7155 SCTP_INP_INFO_RLOCK(); 7156 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7157 if (it->inp) { 7158 SCTP_INP_INCR_REF(it->inp); 7159 } 7160 SCTP_INP_INFO_RUNLOCK(); 7161 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7162 7163 } 7164 SCTP_IPI_ITERATOR_WQ_LOCK(); 7165 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7166 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7167 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7168 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7169 SCTP_FREE(it, SCTP_M_ITER); 7170 return (-1); 7171 } 7172 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7173 if (sctp_it_ctl.iterator_running == 0) { 7174 sctp_wakeup_iterator(); 7175 } 7176 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7177 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7178 return (0); 7179 } 7180