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 #if defined(INET) || defined(INET6) 51 #include <netinet/udp.h> 52 #endif 53 #ifdef INET6 54 #include <netinet6/ip6_var.h> 55 #endif 56 #include <sys/sched.h> 57 #include <sys/smp.h> 58 #include <sys/unistd.h> 59 60 61 VNET_DEFINE(struct sctp_base_info, system_base_info); 62 63 /* FIX: we don't handle multiple link local scopes */ 64 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 65 #ifdef INET6 66 int 67 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 68 { 69 struct sockaddr_in6 tmp_a, tmp_b; 70 71 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 72 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 73 return (0); 74 } 75 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 76 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 77 return (0); 78 } 79 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 80 } 81 #endif 82 83 void 84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85 { 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 SCTP_INP_INFO_RUNLOCK(); 100 } 101 102 /*- 103 * Addresses are added to VRF's (Virtual Router's). For BSD we 104 * have only the default VRF 0. We maintain a hash list of 105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 106 * these has a list of addresses. When we add a new address 107 * to a VRF we lookup the ifn/ifn_index, if the ifn does 108 * not exist we create it and add it to the list of IFN's 109 * within the VRF. Once we have the sctp_ifn, we add the 110 * address to the list. So we look something like: 111 * 112 * hash-vrf-table 113 * vrf-> ifn-> ifn -> ifn 114 * vrf | 115 * ... +--ifa-> ifa -> ifa 116 * vrf 117 * 118 * We keep these separate lists since the SCTP subsystem will 119 * point to these from its source address selection nets structure. 120 * When an address is deleted it does not happen right away on 121 * the SCTP side, it gets scheduled. What we do when a 122 * delete happens is immediately remove the address from 123 * the master list and decrement the refcount. As our 124 * addip iterator works through and frees the src address 125 * selection pointing to the sctp_ifa, eventually the refcount 126 * will reach 0 and we will delete it. Note that it is assumed 127 * that any locking on system level ifn/ifa is done at the 128 * caller of these functions and these routines will only 129 * lock the SCTP structures as they add or delete things. 130 * 131 * Other notes on VRF concepts. 132 * - An endpoint can be in multiple VRF's 133 * - An association lives within a VRF and only one VRF. 134 * - Any incoming packet we can deduce the VRF for by 135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 136 * - Any downward send call or connect call must supply the 137 * VRF via ancillary data or via some sort of set default 138 * VRF socket option call (again for BSD no brainer since 139 * the VRF is always 0). 140 * - An endpoint may add multiple VRF's to it. 141 * - Listening sockets can accept associations in any 142 * of the VRF's they are in but the assoc will end up 143 * in only one VRF (gotten from the packet or connect/send). 144 * 145 */ 146 147 struct sctp_vrf * 148 sctp_allocate_vrf(int vrf_id) 149 { 150 struct sctp_vrf *vrf = NULL; 151 struct sctp_vrflist *bucket; 152 153 /* First allocate the VRF structure */ 154 vrf = sctp_find_vrf(vrf_id); 155 if (vrf) { 156 /* Already allocated */ 157 return (vrf); 158 } 159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 160 SCTP_M_VRF); 161 if (vrf == NULL) { 162 /* No memory */ 163 #ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165 #endif 166 return (NULL); 167 } 168 /* setup the VRF */ 169 memset(vrf, 0, sizeof(struct sctp_vrf)); 170 vrf->vrf_id = vrf_id; 171 LIST_INIT(&vrf->ifnlist); 172 vrf->total_ifa_count = 0; 173 vrf->refcount = 0; 174 /* now also setup table ids */ 175 SCTP_INIT_VRF_TABLEID(vrf); 176 /* Init the HASH of addresses */ 177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 178 &vrf->vrf_addr_hashmark); 179 if (vrf->vrf_addr_hash == NULL) { 180 /* No memory */ 181 #ifdef INVARIANTS 182 panic("No memory for VRF:%d", vrf_id); 183 #endif 184 SCTP_FREE(vrf, SCTP_M_VRF); 185 return (NULL); 186 } 187 188 /* Add it to the hash table */ 189 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 190 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 191 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 192 return (vrf); 193 } 194 195 196 struct sctp_ifn * 197 sctp_find_ifn(void *ifn, uint32_t ifn_index) 198 { 199 struct sctp_ifn *sctp_ifnp; 200 struct sctp_ifnlist *hash_ifn_head; 201 202 /* 203 * We assume the lock is held for the addresses if that's wrong 204 * problems could occur :-) 205 */ 206 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 207 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 208 if (sctp_ifnp->ifn_index == ifn_index) { 209 return (sctp_ifnp); 210 } 211 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 212 return (sctp_ifnp); 213 } 214 } 215 return (NULL); 216 } 217 218 219 struct sctp_vrf * 220 sctp_find_vrf(uint32_t vrf_id) 221 { 222 struct sctp_vrflist *bucket; 223 struct sctp_vrf *liste; 224 225 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 226 LIST_FOREACH(liste, bucket, next_vrf) { 227 if (vrf_id == liste->vrf_id) { 228 return (liste); 229 } 230 } 231 return (NULL); 232 } 233 234 235 void 236 sctp_free_vrf(struct sctp_vrf *vrf) 237 { 238 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 239 if (vrf->vrf_addr_hash) { 240 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 241 vrf->vrf_addr_hash = NULL; 242 } 243 /* We zero'd the count */ 244 LIST_REMOVE(vrf, next_vrf); 245 SCTP_FREE(vrf, SCTP_M_VRF); 246 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 247 } 248 } 249 250 251 void 252 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 253 { 254 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 255 /* We zero'd the count */ 256 if (sctp_ifnp->vrf) { 257 sctp_free_vrf(sctp_ifnp->vrf); 258 } 259 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 260 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 261 } 262 } 263 264 265 void 266 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 267 { 268 struct sctp_ifn *sctp_ifnp; 269 270 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 271 if (sctp_ifnp != NULL) { 272 sctp_ifnp->ifn_mtu = mtu; 273 } 274 } 275 276 277 void 278 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 279 { 280 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 281 /* We zero'd the count */ 282 if (sctp_ifap->ifn_p) { 283 sctp_free_ifn(sctp_ifap->ifn_p); 284 } 285 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 286 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 287 } 288 } 289 290 291 static void 292 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 293 { 294 struct sctp_ifn *found; 295 296 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 297 if (found == NULL) { 298 /* Not in the list.. sorry */ 299 return; 300 } 301 if (hold_addr_lock == 0) 302 SCTP_IPI_ADDR_WLOCK(); 303 LIST_REMOVE(sctp_ifnp, next_bucket); 304 LIST_REMOVE(sctp_ifnp, next_ifn); 305 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 306 sctp_ifnp->registered_af); 307 if (hold_addr_lock == 0) 308 SCTP_IPI_ADDR_WUNLOCK(); 309 /* Take away the reference, and possibly free it */ 310 sctp_free_ifn(sctp_ifnp); 311 } 312 313 314 void 315 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 316 const char *if_name, uint32_t ifn_index) 317 { 318 struct sctp_vrf *vrf; 319 struct sctp_ifa *sctp_ifap; 320 321 SCTP_IPI_ADDR_RLOCK(); 322 vrf = sctp_find_vrf(vrf_id); 323 if (vrf == NULL) { 324 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 325 goto out; 326 327 } 328 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 329 if (sctp_ifap == NULL) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 331 goto out; 332 } 333 if (sctp_ifap->ifn_p == NULL) { 334 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 335 goto out; 336 } 337 if (if_name) { 338 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 339 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 340 sctp_ifap->ifn_p->ifn_name, if_name); 341 goto out; 342 } 343 } else { 344 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 345 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 346 sctp_ifap->ifn_p->ifn_index, ifn_index); 347 goto out; 348 } 349 } 350 351 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 352 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 353 out: 354 SCTP_IPI_ADDR_RUNLOCK(); 355 } 356 357 358 void 359 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 360 const char *if_name, uint32_t ifn_index) 361 { 362 struct sctp_vrf *vrf; 363 struct sctp_ifa *sctp_ifap; 364 365 SCTP_IPI_ADDR_RLOCK(); 366 vrf = sctp_find_vrf(vrf_id); 367 if (vrf == NULL) { 368 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 369 goto out; 370 371 } 372 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 373 if (sctp_ifap == NULL) { 374 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 375 goto out; 376 } 377 if (sctp_ifap->ifn_p == NULL) { 378 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 379 goto out; 380 } 381 if (if_name) { 382 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 383 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 384 sctp_ifap->ifn_p->ifn_name, if_name); 385 goto out; 386 } 387 } else { 388 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 389 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 390 sctp_ifap->ifn_p->ifn_index, ifn_index); 391 goto out; 392 } 393 } 394 395 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 396 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 397 out: 398 SCTP_IPI_ADDR_RUNLOCK(); 399 } 400 401 402 /*- 403 * Add an ifa to an ifn. 404 * Register the interface as necessary. 405 * NOTE: ADDR write lock MUST be held. 406 */ 407 static void 408 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 409 { 410 int ifa_af; 411 412 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 413 sctp_ifap->ifn_p = sctp_ifnp; 414 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 415 /* update address counts */ 416 sctp_ifnp->ifa_count++; 417 ifa_af = sctp_ifap->address.sa.sa_family; 418 switch (ifa_af) { 419 #ifdef INET 420 case AF_INET: 421 sctp_ifnp->num_v4++; 422 break; 423 #endif 424 #ifdef INET6 425 case AF_INET6: 426 sctp_ifnp->num_v6++; 427 break; 428 #endif 429 default: 430 break; 431 } 432 if (sctp_ifnp->ifa_count == 1) { 433 /* register the new interface */ 434 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 435 sctp_ifnp->registered_af = ifa_af; 436 } 437 } 438 439 440 /*- 441 * Remove an ifa from its ifn. 442 * If no more addresses exist, remove the ifn too. Otherwise, re-register 443 * the interface based on the remaining address families left. 444 * NOTE: ADDR write lock MUST be held. 445 */ 446 static void 447 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 448 { 449 LIST_REMOVE(sctp_ifap, next_ifa); 450 if (sctp_ifap->ifn_p) { 451 /* update address counts */ 452 sctp_ifap->ifn_p->ifa_count--; 453 switch (sctp_ifap->address.sa.sa_family) { 454 #ifdef INET 455 case AF_INET: 456 sctp_ifap->ifn_p->num_v4--; 457 break; 458 #endif 459 #ifdef INET6 460 case AF_INET6: 461 sctp_ifap->ifn_p->num_v6--; 462 break; 463 #endif 464 default: 465 break; 466 } 467 468 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 469 /* remove the ifn, possibly freeing it */ 470 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 471 } else { 472 /* re-register address family type, if needed */ 473 if ((sctp_ifap->ifn_p->num_v6 == 0) && 474 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 475 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 476 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 477 sctp_ifap->ifn_p->registered_af = AF_INET; 478 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 479 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 480 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 481 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 482 sctp_ifap->ifn_p->registered_af = AF_INET6; 483 } 484 /* free the ifn refcount */ 485 sctp_free_ifn(sctp_ifap->ifn_p); 486 } 487 sctp_ifap->ifn_p = NULL; 488 } 489 } 490 491 492 struct sctp_ifa * 493 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 494 uint32_t ifn_type, const char *if_name, void *ifa, 495 struct sockaddr *addr, uint32_t ifa_flags, 496 int dynamic_add) 497 { 498 struct sctp_vrf *vrf; 499 struct sctp_ifn *sctp_ifnp = NULL; 500 struct sctp_ifa *sctp_ifap = NULL; 501 struct sctp_ifalist *hash_addr_head; 502 struct sctp_ifnlist *hash_ifn_head; 503 uint32_t hash_of_addr; 504 int new_ifn_af = 0; 505 506 #ifdef SCTP_DEBUG 507 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 508 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 509 #endif 510 SCTP_IPI_ADDR_WLOCK(); 511 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 512 if (sctp_ifnp) { 513 vrf = sctp_ifnp->vrf; 514 } else { 515 vrf = sctp_find_vrf(vrf_id); 516 if (vrf == NULL) { 517 vrf = sctp_allocate_vrf(vrf_id); 518 if (vrf == NULL) { 519 SCTP_IPI_ADDR_WUNLOCK(); 520 return (NULL); 521 } 522 } 523 } 524 if (sctp_ifnp == NULL) { 525 /* 526 * build one and add it, can't hold lock until after malloc 527 * done though. 528 */ 529 SCTP_IPI_ADDR_WUNLOCK(); 530 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 531 sizeof(struct sctp_ifn), SCTP_M_IFN); 532 if (sctp_ifnp == NULL) { 533 #ifdef INVARIANTS 534 panic("No memory for IFN"); 535 #endif 536 return (NULL); 537 } 538 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 539 sctp_ifnp->ifn_index = ifn_index; 540 sctp_ifnp->ifn_p = ifn; 541 sctp_ifnp->ifn_type = ifn_type; 542 sctp_ifnp->refcount = 0; 543 sctp_ifnp->vrf = vrf; 544 atomic_add_int(&vrf->refcount, 1); 545 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 546 if (if_name != NULL) { 547 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 548 } else { 549 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 550 } 551 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 552 LIST_INIT(&sctp_ifnp->ifalist); 553 SCTP_IPI_ADDR_WLOCK(); 554 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 555 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 556 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 557 new_ifn_af = 1; 558 } 559 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 560 if (sctp_ifap) { 561 /* Hmm, it already exists? */ 562 if ((sctp_ifap->ifn_p) && 563 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 564 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 565 sctp_ifap->ifn_p->ifn_name, ifn_index, 566 (void *)sctp_ifap); 567 if (new_ifn_af) { 568 /* Remove the created one that we don't want */ 569 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 570 } 571 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 572 /* easy to solve, just switch back to active */ 573 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 574 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 575 sctp_ifap->ifn_p = sctp_ifnp; 576 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 577 } 578 exit_stage_left: 579 SCTP_IPI_ADDR_WUNLOCK(); 580 return (sctp_ifap); 581 } else { 582 if (sctp_ifap->ifn_p) { 583 /* 584 * The last IFN gets the address, remove the 585 * old one 586 */ 587 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 588 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 589 sctp_ifap->ifn_p->ifn_index, if_name, 590 ifn_index); 591 /* remove the address from the old ifn */ 592 sctp_remove_ifa_from_ifn(sctp_ifap); 593 /* move the address over to the new ifn */ 594 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 595 goto exit_stage_left; 596 } else { 597 /* repair ifnp which was NULL ? */ 598 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 599 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 600 (void *)sctp_ifnp, (void *)sctp_ifap); 601 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 602 } 603 goto exit_stage_left; 604 } 605 } 606 SCTP_IPI_ADDR_WUNLOCK(); 607 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 608 if (sctp_ifap == NULL) { 609 #ifdef INVARIANTS 610 panic("No memory for IFA"); 611 #endif 612 return (NULL); 613 } 614 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 615 sctp_ifap->ifn_p = sctp_ifnp; 616 atomic_add_int(&sctp_ifnp->refcount, 1); 617 sctp_ifap->vrf_id = vrf_id; 618 sctp_ifap->ifa = ifa; 619 memcpy(&sctp_ifap->address, addr, addr->sa_len); 620 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 621 sctp_ifap->flags = ifa_flags; 622 /* Set scope */ 623 switch (sctp_ifap->address.sa.sa_family) { 624 #ifdef INET 625 case AF_INET: 626 { 627 struct sockaddr_in *sin; 628 629 sin = &sctp_ifap->address.sin; 630 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 631 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 632 sctp_ifap->src_is_loop = 1; 633 } 634 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 635 sctp_ifap->src_is_priv = 1; 636 } 637 sctp_ifnp->num_v4++; 638 if (new_ifn_af) 639 new_ifn_af = AF_INET; 640 break; 641 } 642 #endif 643 #ifdef INET6 644 case AF_INET6: 645 { 646 /* ok to use deprecated addresses? */ 647 struct sockaddr_in6 *sin6; 648 649 sin6 = &sctp_ifap->address.sin6; 650 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 651 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 652 sctp_ifap->src_is_loop = 1; 653 } 654 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 655 sctp_ifap->src_is_priv = 1; 656 } 657 sctp_ifnp->num_v6++; 658 if (new_ifn_af) 659 new_ifn_af = AF_INET6; 660 break; 661 } 662 #endif 663 default: 664 new_ifn_af = 0; 665 break; 666 } 667 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 668 669 if ((sctp_ifap->src_is_priv == 0) && 670 (sctp_ifap->src_is_loop == 0)) { 671 sctp_ifap->src_is_glob = 1; 672 } 673 SCTP_IPI_ADDR_WLOCK(); 674 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 675 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 676 sctp_ifap->refcount = 1; 677 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 678 sctp_ifnp->ifa_count++; 679 vrf->total_ifa_count++; 680 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 681 if (new_ifn_af) { 682 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 683 sctp_ifnp->registered_af = new_ifn_af; 684 } 685 SCTP_IPI_ADDR_WUNLOCK(); 686 if (dynamic_add) { 687 /* 688 * Bump up the refcount so that when the timer completes it 689 * will drop back down. 690 */ 691 struct sctp_laddr *wi; 692 693 atomic_add_int(&sctp_ifap->refcount, 1); 694 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 695 if (wi == NULL) { 696 /* 697 * Gak, what can we do? We have lost an address 698 * change can you say HOSED? 699 */ 700 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 701 /* Opps, must decrement the count */ 702 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 703 if_name); 704 return (NULL); 705 } 706 SCTP_INCR_LADDR_COUNT(); 707 memset(wi, 0, sizeof(*wi)); 708 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 709 wi->ifa = sctp_ifap; 710 wi->action = SCTP_ADD_IP_ADDRESS; 711 712 SCTP_WQ_ADDR_LOCK(); 713 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 714 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 715 (struct sctp_inpcb *)NULL, 716 (struct sctp_tcb *)NULL, 717 (struct sctp_nets *)NULL); 718 SCTP_WQ_ADDR_UNLOCK(); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724 } 725 726 void 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729 { 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739 740 #ifdef SCTP_DEBUG 741 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 742 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 743 #endif 744 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 745 if (sctp_ifap) { 746 /* Validate the delete */ 747 if (sctp_ifap->ifn_p) { 748 int valid = 0; 749 750 /*- 751 * The name has priority over the ifn_index 752 * if its given. We do this especially for 753 * panda who might recycle indexes fast. 754 */ 755 if (if_name) { 756 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 757 /* They match its a correct delete */ 758 valid = 1; 759 } 760 } 761 if (!valid) { 762 /* last ditch check ifn_index */ 763 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 764 valid = 1; 765 } 766 } 767 if (!valid) { 768 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 769 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 770 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 771 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 772 SCTP_IPI_ADDR_WUNLOCK(); 773 return; 774 } 775 } 776 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 777 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 778 /* 779 * We don't set the flag. This means that the structure will 780 * hang around in EP's that have bound specific to it until 781 * they close. This gives us TCP like behavior if someone 782 * removes an address (or for that matter adds it right 783 * back). 784 */ 785 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 786 vrf->total_ifa_count--; 787 LIST_REMOVE(sctp_ifap, next_bucket); 788 sctp_remove_ifa_from_ifn(sctp_ifap); 789 } 790 #ifdef SCTP_DEBUG 791 else { 792 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 793 ifn_index); 794 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 795 } 796 #endif 797 798 out_now: 799 SCTP_IPI_ADDR_WUNLOCK(); 800 if (sctp_ifap) { 801 struct sctp_laddr *wi; 802 803 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 804 if (wi == NULL) { 805 /* 806 * Gak, what can we do? We have lost an address 807 * change can you say HOSED? 808 */ 809 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 810 811 /* Oops, must decrement the count */ 812 sctp_free_ifa(sctp_ifap); 813 return; 814 } 815 SCTP_INCR_LADDR_COUNT(); 816 memset(wi, 0, sizeof(*wi)); 817 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 818 wi->ifa = sctp_ifap; 819 wi->action = SCTP_DEL_IP_ADDRESS; 820 SCTP_WQ_ADDR_LOCK(); 821 /* 822 * Should this really be a tailq? As it is we will process 823 * the newest first :-0 824 */ 825 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 826 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 827 (struct sctp_inpcb *)NULL, 828 (struct sctp_tcb *)NULL, 829 (struct sctp_nets *)NULL); 830 SCTP_WQ_ADDR_UNLOCK(); 831 } 832 return; 833 } 834 835 836 static int 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 838 { 839 int loopback_scope; 840 #if defined(INET) 841 int ipv4_local_scope, ipv4_addr_legal; 842 #endif 843 #if defined(INET6) 844 int local_scope, site_scope, ipv6_addr_legal; 845 #endif 846 struct sctp_vrf *vrf; 847 struct sctp_ifn *sctp_ifn; 848 struct sctp_ifa *sctp_ifa; 849 850 loopback_scope = stcb->asoc.scope.loopback_scope; 851 #if defined(INET) 852 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 853 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 854 #endif 855 #if defined(INET6) 856 local_scope = stcb->asoc.scope.local_scope; 857 site_scope = stcb->asoc.scope.site_scope; 858 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 859 #endif 860 861 SCTP_IPI_ADDR_RLOCK(); 862 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 863 if (vrf == NULL) { 864 /* no vrf, no addresses */ 865 SCTP_IPI_ADDR_RUNLOCK(); 866 return (0); 867 } 868 869 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 870 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 871 if ((loopback_scope == 0) && 872 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 873 continue; 874 } 875 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 876 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 877 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 878 /* 879 * We allow pending addresses, where 880 * we have sent an asconf-add to be 881 * considered valid. 882 */ 883 continue; 884 } 885 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 886 continue; 887 } 888 switch (sctp_ifa->address.sa.sa_family) { 889 #ifdef INET 890 case AF_INET: 891 if (ipv4_addr_legal) { 892 struct sockaddr_in *sin, 893 *rsin; 894 895 sin = &sctp_ifa->address.sin; 896 rsin = (struct sockaddr_in *)to; 897 if ((ipv4_local_scope == 0) && 898 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 899 continue; 900 } 901 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 902 &sin->sin_addr) != 0) { 903 continue; 904 } 905 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 906 SCTP_IPI_ADDR_RUNLOCK(); 907 return (1); 908 } 909 } 910 break; 911 #endif 912 #ifdef INET6 913 case AF_INET6: 914 if (ipv6_addr_legal) { 915 struct sockaddr_in6 *sin6, 916 *rsin6; 917 918 sin6 = &sctp_ifa->address.sin6; 919 rsin6 = (struct sockaddr_in6 *)to; 920 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 921 &sin6->sin6_addr) != 0) { 922 continue; 923 } 924 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 925 if (local_scope == 0) 926 continue; 927 if (sin6->sin6_scope_id == 0) { 928 if (sa6_recoverscope(sin6) != 0) 929 continue; 930 } 931 } 932 if ((site_scope == 0) && 933 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 934 continue; 935 } 936 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 937 SCTP_IPI_ADDR_RUNLOCK(); 938 return (1); 939 } 940 } 941 break; 942 #endif 943 default: 944 /* TSNH */ 945 break; 946 } 947 } 948 } 949 } else { 950 struct sctp_laddr *laddr; 951 952 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 953 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 954 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 955 continue; 956 } 957 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 958 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 959 /* 960 * We allow pending addresses, where we have 961 * sent an asconf-add to be considered 962 * valid. 963 */ 964 continue; 965 } 966 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 967 continue; 968 } 969 switch (to->sa_family) { 970 #ifdef INET 971 case AF_INET: 972 { 973 struct sockaddr_in *sin, *rsin; 974 975 sin = &laddr->ifa->address.sin; 976 rsin = (struct sockaddr_in *)to; 977 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 978 SCTP_IPI_ADDR_RUNLOCK(); 979 return (1); 980 } 981 break; 982 } 983 #endif 984 #ifdef INET6 985 case AF_INET6: 986 { 987 struct sockaddr_in6 *sin6, *rsin6; 988 989 sin6 = &laddr->ifa->address.sin6; 990 rsin6 = (struct sockaddr_in6 *)to; 991 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 992 SCTP_IPI_ADDR_RUNLOCK(); 993 return (1); 994 } 995 break; 996 } 997 998 #endif 999 default: 1000 /* TSNH */ 1001 break; 1002 } 1003 1004 } 1005 } 1006 SCTP_IPI_ADDR_RUNLOCK(); 1007 return (0); 1008 } 1009 1010 1011 static struct sctp_tcb * 1012 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1013 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1014 { 1015 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1016 /* 1017 * If we support the TCP model, then we must now dig through to see 1018 * if we can find our endpoint in the list of tcp ep's. 1019 */ 1020 uint16_t lport, rport; 1021 struct sctppcbhead *ephead; 1022 struct sctp_inpcb *inp; 1023 struct sctp_laddr *laddr; 1024 struct sctp_tcb *stcb; 1025 struct sctp_nets *net; 1026 1027 if ((to == NULL) || (from == NULL)) { 1028 return (NULL); 1029 } 1030 1031 switch (to->sa_family) { 1032 #ifdef INET 1033 case AF_INET: 1034 if (from->sa_family == AF_INET) { 1035 lport = ((struct sockaddr_in *)to)->sin_port; 1036 rport = ((struct sockaddr_in *)from)->sin_port; 1037 } else { 1038 return (NULL); 1039 } 1040 break; 1041 #endif 1042 #ifdef INET6 1043 case AF_INET6: 1044 if (from->sa_family == AF_INET6) { 1045 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1046 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1047 } else { 1048 return (NULL); 1049 } 1050 break; 1051 #endif 1052 default: 1053 return (NULL); 1054 } 1055 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1056 /* 1057 * Ok now for each of the guys in this bucket we must look and see: 1058 * - Does the remote port match. - Does there single association's 1059 * addresses match this address (to). If so we update p_ep to point 1060 * to this ep and return the tcb from it. 1061 */ 1062 LIST_FOREACH(inp, ephead, sctp_hash) { 1063 SCTP_INP_RLOCK(inp); 1064 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1065 SCTP_INP_RUNLOCK(inp); 1066 continue; 1067 } 1068 if (lport != inp->sctp_lport) { 1069 SCTP_INP_RUNLOCK(inp); 1070 continue; 1071 } 1072 switch (to->sa_family) { 1073 #ifdef INET 1074 case AF_INET: 1075 { 1076 struct sockaddr_in *sin; 1077 1078 sin = (struct sockaddr_in *)to; 1079 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1080 &sin->sin_addr) != 0) { 1081 SCTP_INP_RUNLOCK(inp); 1082 continue; 1083 } 1084 break; 1085 } 1086 #endif 1087 #ifdef INET6 1088 case AF_INET6: 1089 { 1090 struct sockaddr_in6 *sin6; 1091 1092 sin6 = (struct sockaddr_in6 *)to; 1093 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1094 &sin6->sin6_addr) != 0) { 1095 SCTP_INP_RUNLOCK(inp); 1096 continue; 1097 } 1098 break; 1099 } 1100 #endif 1101 default: 1102 SCTP_INP_RUNLOCK(inp); 1103 continue; 1104 } 1105 if (inp->def_vrf_id != vrf_id) { 1106 SCTP_INP_RUNLOCK(inp); 1107 continue; 1108 } 1109 /* check to see if the ep has one of the addresses */ 1110 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1111 /* We are NOT bound all, so look further */ 1112 int match = 0; 1113 1114 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1115 1116 if (laddr->ifa == NULL) { 1117 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1118 continue; 1119 } 1120 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1121 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1122 continue; 1123 } 1124 if (laddr->ifa->address.sa.sa_family == 1125 to->sa_family) { 1126 /* see if it matches */ 1127 #ifdef INET 1128 if (from->sa_family == AF_INET) { 1129 struct sockaddr_in *intf_addr, 1130 *sin; 1131 1132 intf_addr = &laddr->ifa->address.sin; 1133 sin = (struct sockaddr_in *)to; 1134 if (sin->sin_addr.s_addr == 1135 intf_addr->sin_addr.s_addr) { 1136 match = 1; 1137 break; 1138 } 1139 } 1140 #endif 1141 #ifdef INET6 1142 if (from->sa_family == AF_INET6) { 1143 struct sockaddr_in6 *intf_addr6; 1144 struct sockaddr_in6 *sin6; 1145 1146 sin6 = (struct sockaddr_in6 *) 1147 to; 1148 intf_addr6 = &laddr->ifa->address.sin6; 1149 1150 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1151 intf_addr6)) { 1152 match = 1; 1153 break; 1154 } 1155 } 1156 #endif 1157 } 1158 } 1159 if (match == 0) { 1160 /* This endpoint does not have this address */ 1161 SCTP_INP_RUNLOCK(inp); 1162 continue; 1163 } 1164 } 1165 /* 1166 * Ok if we hit here the ep has the address, does it hold 1167 * the tcb? 1168 */ 1169 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1170 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1171 if (stcb == NULL) { 1172 SCTP_INP_RUNLOCK(inp); 1173 continue; 1174 } 1175 SCTP_TCB_LOCK(stcb); 1176 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1177 SCTP_TCB_UNLOCK(stcb); 1178 SCTP_INP_RUNLOCK(inp); 1179 continue; 1180 } 1181 if (stcb->rport != rport) { 1182 /* remote port does not match. */ 1183 SCTP_TCB_UNLOCK(stcb); 1184 SCTP_INP_RUNLOCK(inp); 1185 continue; 1186 } 1187 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1188 SCTP_TCB_UNLOCK(stcb); 1189 SCTP_INP_RUNLOCK(inp); 1190 continue; 1191 } 1192 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1193 SCTP_TCB_UNLOCK(stcb); 1194 SCTP_INP_RUNLOCK(inp); 1195 continue; 1196 } 1197 /* Does this TCB have a matching address? */ 1198 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1199 1200 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1201 /* not the same family, can't be a match */ 1202 continue; 1203 } 1204 switch (from->sa_family) { 1205 #ifdef INET 1206 case AF_INET: 1207 { 1208 struct sockaddr_in *sin, *rsin; 1209 1210 sin = (struct sockaddr_in *)&net->ro._l_addr; 1211 rsin = (struct sockaddr_in *)from; 1212 if (sin->sin_addr.s_addr == 1213 rsin->sin_addr.s_addr) { 1214 /* found it */ 1215 if (netp != NULL) { 1216 *netp = net; 1217 } 1218 /* 1219 * Update the endpoint 1220 * pointer 1221 */ 1222 *inp_p = inp; 1223 SCTP_INP_RUNLOCK(inp); 1224 return (stcb); 1225 } 1226 break; 1227 } 1228 #endif 1229 #ifdef INET6 1230 case AF_INET6: 1231 { 1232 struct sockaddr_in6 *sin6, *rsin6; 1233 1234 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1235 rsin6 = (struct sockaddr_in6 *)from; 1236 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1237 rsin6)) { 1238 /* found it */ 1239 if (netp != NULL) { 1240 *netp = net; 1241 } 1242 /* 1243 * Update the endpoint 1244 * pointer 1245 */ 1246 *inp_p = inp; 1247 SCTP_INP_RUNLOCK(inp); 1248 return (stcb); 1249 } 1250 break; 1251 } 1252 #endif 1253 default: 1254 /* TSNH */ 1255 break; 1256 } 1257 } 1258 SCTP_TCB_UNLOCK(stcb); 1259 SCTP_INP_RUNLOCK(inp); 1260 } 1261 return (NULL); 1262 } 1263 1264 1265 /* 1266 * rules for use 1267 * 1268 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1269 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1270 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1271 * NULL. 1272 */ 1273 1274 struct sctp_tcb * 1275 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1276 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1277 { 1278 struct sctpasochead *head; 1279 struct sctp_inpcb *inp; 1280 struct sctp_tcb *stcb = NULL; 1281 struct sctp_nets *net; 1282 uint16_t rport; 1283 1284 inp = *inp_p; 1285 switch (remote->sa_family) { 1286 #ifdef INET 1287 case AF_INET: 1288 rport = (((struct sockaddr_in *)remote)->sin_port); 1289 break; 1290 #endif 1291 #ifdef INET6 1292 case AF_INET6: 1293 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1294 break; 1295 #endif 1296 default: 1297 return (NULL); 1298 } 1299 if (locked_tcb) { 1300 /* 1301 * UN-lock so we can do proper locking here this occurs when 1302 * called from load_addresses_from_init. 1303 */ 1304 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1305 SCTP_TCB_UNLOCK(locked_tcb); 1306 } 1307 SCTP_INP_INFO_RLOCK(); 1308 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1309 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1310 /*- 1311 * Now either this guy is our listener or it's the 1312 * connector. If it is the one that issued the connect, then 1313 * it's only chance is to be the first TCB in the list. If 1314 * it is the acceptor, then do the special_lookup to hash 1315 * and find the real inp. 1316 */ 1317 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1318 /* to is peer addr, from is my addr */ 1319 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1320 netp, inp->def_vrf_id); 1321 if ((stcb != NULL) && (locked_tcb == NULL)) { 1322 /* we have a locked tcb, lower refcount */ 1323 SCTP_INP_DECR_REF(inp); 1324 } 1325 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1326 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1327 SCTP_TCB_LOCK(locked_tcb); 1328 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1329 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1330 } 1331 SCTP_INP_INFO_RUNLOCK(); 1332 return (stcb); 1333 } else { 1334 SCTP_INP_WLOCK(inp); 1335 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1336 goto null_return; 1337 } 1338 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1339 if (stcb == NULL) { 1340 goto null_return; 1341 } 1342 SCTP_TCB_LOCK(stcb); 1343 1344 if (stcb->rport != rport) { 1345 /* remote port does not match. */ 1346 SCTP_TCB_UNLOCK(stcb); 1347 goto null_return; 1348 } 1349 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1350 SCTP_TCB_UNLOCK(stcb); 1351 goto null_return; 1352 } 1353 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1354 SCTP_TCB_UNLOCK(stcb); 1355 goto null_return; 1356 } 1357 /* now look at the list of remote addresses */ 1358 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1359 #ifdef INVARIANTS 1360 if (net == (TAILQ_NEXT(net, sctp_next))) { 1361 panic("Corrupt net list"); 1362 } 1363 #endif 1364 if (net->ro._l_addr.sa.sa_family != 1365 remote->sa_family) { 1366 /* not the same family */ 1367 continue; 1368 } 1369 switch (remote->sa_family) { 1370 #ifdef INET 1371 case AF_INET: 1372 { 1373 struct sockaddr_in *sin, 1374 *rsin; 1375 1376 sin = (struct sockaddr_in *) 1377 &net->ro._l_addr; 1378 rsin = (struct sockaddr_in *)remote; 1379 if (sin->sin_addr.s_addr == 1380 rsin->sin_addr.s_addr) { 1381 /* found it */ 1382 if (netp != NULL) { 1383 *netp = net; 1384 } 1385 if (locked_tcb == NULL) { 1386 SCTP_INP_DECR_REF(inp); 1387 } else if (locked_tcb != stcb) { 1388 SCTP_TCB_LOCK(locked_tcb); 1389 } 1390 if (locked_tcb) { 1391 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1392 } 1393 1394 SCTP_INP_WUNLOCK(inp); 1395 SCTP_INP_INFO_RUNLOCK(); 1396 return (stcb); 1397 } 1398 break; 1399 } 1400 #endif 1401 #ifdef INET6 1402 case AF_INET6: 1403 { 1404 struct sockaddr_in6 *sin6, 1405 *rsin6; 1406 1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1408 rsin6 = (struct sockaddr_in6 *)remote; 1409 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1410 rsin6)) { 1411 /* found it */ 1412 if (netp != NULL) { 1413 *netp = net; 1414 } 1415 if (locked_tcb == NULL) { 1416 SCTP_INP_DECR_REF(inp); 1417 } else if (locked_tcb != stcb) { 1418 SCTP_TCB_LOCK(locked_tcb); 1419 } 1420 if (locked_tcb) { 1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1422 } 1423 SCTP_INP_WUNLOCK(inp); 1424 SCTP_INP_INFO_RUNLOCK(); 1425 return (stcb); 1426 } 1427 break; 1428 } 1429 #endif 1430 default: 1431 /* TSNH */ 1432 break; 1433 } 1434 } 1435 SCTP_TCB_UNLOCK(stcb); 1436 } 1437 } else { 1438 SCTP_INP_WLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 goto null_return; 1441 } 1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1443 inp->sctp_hashmark)]; 1444 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1445 if (stcb->rport != rport) { 1446 /* remote port does not match */ 1447 continue; 1448 } 1449 SCTP_TCB_LOCK(stcb); 1450 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1455 SCTP_TCB_UNLOCK(stcb); 1456 continue; 1457 } 1458 /* now look at the list of remote addresses */ 1459 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1460 #ifdef INVARIANTS 1461 if (net == (TAILQ_NEXT(net, sctp_next))) { 1462 panic("Corrupt net list"); 1463 } 1464 #endif 1465 if (net->ro._l_addr.sa.sa_family != 1466 remote->sa_family) { 1467 /* not the same family */ 1468 continue; 1469 } 1470 switch (remote->sa_family) { 1471 #ifdef INET 1472 case AF_INET: 1473 { 1474 struct sockaddr_in *sin, 1475 *rsin; 1476 1477 sin = (struct sockaddr_in *) 1478 &net->ro._l_addr; 1479 rsin = (struct sockaddr_in *)remote; 1480 if (sin->sin_addr.s_addr == 1481 rsin->sin_addr.s_addr) { 1482 /* found it */ 1483 if (netp != NULL) { 1484 *netp = net; 1485 } 1486 if (locked_tcb == NULL) { 1487 SCTP_INP_DECR_REF(inp); 1488 } else if (locked_tcb != stcb) { 1489 SCTP_TCB_LOCK(locked_tcb); 1490 } 1491 if (locked_tcb) { 1492 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1493 } 1494 SCTP_INP_WUNLOCK(inp); 1495 SCTP_INP_INFO_RUNLOCK(); 1496 return (stcb); 1497 } 1498 break; 1499 } 1500 #endif 1501 #ifdef INET6 1502 case AF_INET6: 1503 { 1504 struct sockaddr_in6 *sin6, 1505 *rsin6; 1506 1507 sin6 = (struct sockaddr_in6 *) 1508 &net->ro._l_addr; 1509 rsin6 = (struct sockaddr_in6 *)remote; 1510 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1511 rsin6)) { 1512 /* found it */ 1513 if (netp != NULL) { 1514 *netp = net; 1515 } 1516 if (locked_tcb == NULL) { 1517 SCTP_INP_DECR_REF(inp); 1518 } else if (locked_tcb != stcb) { 1519 SCTP_TCB_LOCK(locked_tcb); 1520 } 1521 if (locked_tcb) { 1522 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1523 } 1524 SCTP_INP_WUNLOCK(inp); 1525 SCTP_INP_INFO_RUNLOCK(); 1526 return (stcb); 1527 } 1528 break; 1529 } 1530 #endif 1531 default: 1532 /* TSNH */ 1533 break; 1534 } 1535 } 1536 SCTP_TCB_UNLOCK(stcb); 1537 } 1538 } 1539 null_return: 1540 /* clean up for returning null */ 1541 if (locked_tcb) { 1542 SCTP_TCB_LOCK(locked_tcb); 1543 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1544 } 1545 SCTP_INP_WUNLOCK(inp); 1546 SCTP_INP_INFO_RUNLOCK(); 1547 /* not found */ 1548 return (NULL); 1549 } 1550 1551 1552 /* 1553 * Find an association for a specific endpoint using the association id given 1554 * out in the COMM_UP notification 1555 */ 1556 struct sctp_tcb * 1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1558 { 1559 /* 1560 * Use my the assoc_id to find a endpoint 1561 */ 1562 struct sctpasochead *head; 1563 struct sctp_tcb *stcb; 1564 uint32_t id; 1565 1566 if (inp == NULL) { 1567 SCTP_PRINTF("TSNH ep_associd\n"); 1568 return (NULL); 1569 } 1570 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1571 SCTP_PRINTF("TSNH ep_associd0\n"); 1572 return (NULL); 1573 } 1574 id = (uint32_t)asoc_id; 1575 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1576 if (head == NULL) { 1577 /* invalid id TSNH */ 1578 SCTP_PRINTF("TSNH ep_associd1\n"); 1579 return (NULL); 1580 } 1581 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1582 if (stcb->asoc.assoc_id == id) { 1583 if (inp != stcb->sctp_ep) { 1584 /* 1585 * some other guy has the same id active (id 1586 * collision ??). 1587 */ 1588 SCTP_PRINTF("TSNH ep_associd2\n"); 1589 continue; 1590 } 1591 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1592 continue; 1593 } 1594 if (want_lock) { 1595 SCTP_TCB_LOCK(stcb); 1596 } 1597 return (stcb); 1598 } 1599 } 1600 return (NULL); 1601 } 1602 1603 1604 struct sctp_tcb * 1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1606 { 1607 struct sctp_tcb *stcb; 1608 1609 SCTP_INP_RLOCK(inp); 1610 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1611 SCTP_INP_RUNLOCK(inp); 1612 return (stcb); 1613 } 1614 1615 1616 /* 1617 * Endpoint probe expects that the INP_INFO is locked. 1618 */ 1619 static struct sctp_inpcb * 1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1621 uint16_t lport, uint32_t vrf_id) 1622 { 1623 struct sctp_inpcb *inp; 1624 struct sctp_laddr *laddr; 1625 #ifdef INET 1626 struct sockaddr_in *sin; 1627 #endif 1628 #ifdef INET6 1629 struct sockaddr_in6 *sin6; 1630 struct sockaddr_in6 *intf_addr6; 1631 #endif 1632 int fnd; 1633 1634 #ifdef INET 1635 sin = NULL; 1636 #endif 1637 #ifdef INET6 1638 sin6 = NULL; 1639 #endif 1640 switch (nam->sa_family) { 1641 #ifdef INET 1642 case AF_INET: 1643 sin = (struct sockaddr_in *)nam; 1644 break; 1645 #endif 1646 #ifdef INET6 1647 case AF_INET6: 1648 sin6 = (struct sockaddr_in6 *)nam; 1649 break; 1650 #endif 1651 default: 1652 /* unsupported family */ 1653 return (NULL); 1654 } 1655 1656 if (head == NULL) 1657 return (NULL); 1658 1659 LIST_FOREACH(inp, head, sctp_hash) { 1660 SCTP_INP_RLOCK(inp); 1661 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1662 SCTP_INP_RUNLOCK(inp); 1663 continue; 1664 } 1665 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1666 (inp->sctp_lport == lport)) { 1667 /* got it */ 1668 switch (nam->sa_family) { 1669 #ifdef INET 1670 case AF_INET: 1671 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1672 SCTP_IPV6_V6ONLY(inp)) { 1673 /* 1674 * IPv4 on a IPv6 socket with ONLY 1675 * IPv6 set 1676 */ 1677 SCTP_INP_RUNLOCK(inp); 1678 continue; 1679 } 1680 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1681 &sin->sin_addr) != 0) { 1682 SCTP_INP_RUNLOCK(inp); 1683 continue; 1684 } 1685 break; 1686 #endif 1687 #ifdef INET6 1688 case AF_INET6: 1689 /* 1690 * A V6 address and the endpoint is NOT 1691 * bound V6 1692 */ 1693 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1694 SCTP_INP_RUNLOCK(inp); 1695 continue; 1696 } 1697 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1698 &sin6->sin6_addr) != 0) { 1699 SCTP_INP_RUNLOCK(inp); 1700 continue; 1701 } 1702 break; 1703 #endif 1704 default: 1705 break; 1706 } 1707 /* does a VRF id match? */ 1708 fnd = 0; 1709 if (inp->def_vrf_id == vrf_id) 1710 fnd = 1; 1711 1712 SCTP_INP_RUNLOCK(inp); 1713 if (!fnd) 1714 continue; 1715 return (inp); 1716 } 1717 SCTP_INP_RUNLOCK(inp); 1718 } 1719 switch (nam->sa_family) { 1720 #ifdef INET 1721 case AF_INET: 1722 if (sin->sin_addr.s_addr == INADDR_ANY) { 1723 /* Can't hunt for one that has no address specified */ 1724 return (NULL); 1725 } 1726 break; 1727 #endif 1728 #ifdef INET6 1729 case AF_INET6: 1730 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1731 /* Can't hunt for one that has no address specified */ 1732 return (NULL); 1733 } 1734 break; 1735 #endif 1736 default: 1737 break; 1738 } 1739 /* 1740 * ok, not bound to all so see if we can find a EP bound to this 1741 * address. 1742 */ 1743 LIST_FOREACH(inp, head, sctp_hash) { 1744 SCTP_INP_RLOCK(inp); 1745 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1746 SCTP_INP_RUNLOCK(inp); 1747 continue; 1748 } 1749 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1750 SCTP_INP_RUNLOCK(inp); 1751 continue; 1752 } 1753 /* 1754 * Ok this could be a likely candidate, look at all of its 1755 * addresses 1756 */ 1757 if (inp->sctp_lport != lport) { 1758 SCTP_INP_RUNLOCK(inp); 1759 continue; 1760 } 1761 /* does a VRF id match? */ 1762 fnd = 0; 1763 if (inp->def_vrf_id == vrf_id) 1764 fnd = 1; 1765 1766 if (!fnd) { 1767 SCTP_INP_RUNLOCK(inp); 1768 continue; 1769 } 1770 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1771 if (laddr->ifa == NULL) { 1772 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1773 __func__); 1774 continue; 1775 } 1776 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1777 (void *)laddr->ifa); 1778 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1779 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1780 continue; 1781 } 1782 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1783 /* possible, see if it matches */ 1784 switch (nam->sa_family) { 1785 #ifdef INET 1786 case AF_INET: 1787 if (sin->sin_addr.s_addr == 1788 laddr->ifa->address.sin.sin_addr.s_addr) { 1789 SCTP_INP_RUNLOCK(inp); 1790 return (inp); 1791 } 1792 break; 1793 #endif 1794 #ifdef INET6 1795 case AF_INET6: 1796 intf_addr6 = &laddr->ifa->address.sin6; 1797 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1798 intf_addr6)) { 1799 SCTP_INP_RUNLOCK(inp); 1800 return (inp); 1801 } 1802 break; 1803 #endif 1804 } 1805 } 1806 } 1807 SCTP_INP_RUNLOCK(inp); 1808 } 1809 return (NULL); 1810 } 1811 1812 1813 static struct sctp_inpcb * 1814 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1815 { 1816 struct sctppcbhead *head; 1817 struct sctp_inpcb *t_inp; 1818 int fnd; 1819 1820 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1821 SCTP_BASE_INFO(hashmark))]; 1822 LIST_FOREACH(t_inp, head, sctp_hash) { 1823 if (t_inp->sctp_lport != lport) { 1824 continue; 1825 } 1826 /* is it in the VRF in question */ 1827 fnd = 0; 1828 if (t_inp->def_vrf_id == vrf_id) 1829 fnd = 1; 1830 if (!fnd) 1831 continue; 1832 1833 /* This one is in use. */ 1834 /* check the v6/v4 binding issue */ 1835 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1836 SCTP_IPV6_V6ONLY(t_inp)) { 1837 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1838 /* collision in V6 space */ 1839 return (t_inp); 1840 } else { 1841 /* inp is BOUND_V4 no conflict */ 1842 continue; 1843 } 1844 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1845 /* t_inp is bound v4 and v6, conflict always */ 1846 return (t_inp); 1847 } else { 1848 /* t_inp is bound only V4 */ 1849 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1850 SCTP_IPV6_V6ONLY(inp)) { 1851 /* no conflict */ 1852 continue; 1853 } 1854 /* else fall through to conflict */ 1855 } 1856 return (t_inp); 1857 } 1858 return (NULL); 1859 } 1860 1861 1862 int 1863 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1864 { 1865 /* For 1-2-1 with port reuse */ 1866 struct sctppcbhead *head; 1867 struct sctp_inpcb *tinp, *ninp; 1868 1869 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1870 /* only works with port reuse on */ 1871 return (-1); 1872 } 1873 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1874 return (0); 1875 } 1876 SCTP_INP_RUNLOCK(inp); 1877 SCTP_INP_INFO_WLOCK(); 1878 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1879 SCTP_BASE_INFO(hashmark))]; 1880 /* Kick out all non-listeners to the TCP hash */ 1881 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1882 if (tinp->sctp_lport != inp->sctp_lport) { 1883 continue; 1884 } 1885 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1886 continue; 1887 } 1888 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1889 continue; 1890 } 1891 if (SCTP_IS_LISTENING(tinp)) { 1892 continue; 1893 } 1894 SCTP_INP_WLOCK(tinp); 1895 LIST_REMOVE(tinp, sctp_hash); 1896 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1897 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1898 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1899 SCTP_INP_WUNLOCK(tinp); 1900 } 1901 SCTP_INP_WLOCK(inp); 1902 /* Pull from where he was */ 1903 LIST_REMOVE(inp, sctp_hash); 1904 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1905 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1906 LIST_INSERT_HEAD(head, inp, sctp_hash); 1907 SCTP_INP_WUNLOCK(inp); 1908 SCTP_INP_RLOCK(inp); 1909 SCTP_INP_INFO_WUNLOCK(); 1910 return (0); 1911 } 1912 1913 1914 struct sctp_inpcb * 1915 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1916 uint32_t vrf_id) 1917 { 1918 /* 1919 * First we check the hash table to see if someone has this port 1920 * bound with just the port. 1921 */ 1922 struct sctp_inpcb *inp; 1923 struct sctppcbhead *head; 1924 int lport; 1925 unsigned int i; 1926 #ifdef INET 1927 struct sockaddr_in *sin; 1928 #endif 1929 #ifdef INET6 1930 struct sockaddr_in6 *sin6; 1931 #endif 1932 1933 switch (nam->sa_family) { 1934 #ifdef INET 1935 case AF_INET: 1936 sin = (struct sockaddr_in *)nam; 1937 lport = sin->sin_port; 1938 break; 1939 #endif 1940 #ifdef INET6 1941 case AF_INET6: 1942 sin6 = (struct sockaddr_in6 *)nam; 1943 lport = sin6->sin6_port; 1944 break; 1945 #endif 1946 default: 1947 return (NULL); 1948 } 1949 /* 1950 * I could cheat here and just cast to one of the types but we will 1951 * do it right. It also provides the check against an Unsupported 1952 * type too. 1953 */ 1954 /* Find the head of the ALLADDR chain */ 1955 if (have_lock == 0) { 1956 SCTP_INP_INFO_RLOCK(); 1957 } 1958 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1959 SCTP_BASE_INFO(hashmark))]; 1960 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1961 1962 /* 1963 * If the TCP model exists it could be that the main listening 1964 * endpoint is gone but there still exists a connected socket for 1965 * this guy. If so we can return the first one that we find. This 1966 * may NOT be the correct one so the caller should be wary on the 1967 * returned INP. Currently the only caller that sets find_tcp_pool 1968 * is in bindx where we are verifying that a user CAN bind the 1969 * address. He either has bound it already, or someone else has, or 1970 * its open to bind, so this is good enough. 1971 */ 1972 if (inp == NULL && find_tcp_pool) { 1973 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1974 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1975 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1976 if (inp) { 1977 break; 1978 } 1979 } 1980 } 1981 if (inp) { 1982 SCTP_INP_INCR_REF(inp); 1983 } 1984 if (have_lock == 0) { 1985 SCTP_INP_INFO_RUNLOCK(); 1986 } 1987 return (inp); 1988 } 1989 1990 1991 /* 1992 * Find an association for an endpoint with the pointer to whom you want to 1993 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1994 * need to change the *to to some other struct like a mbuf... 1995 */ 1996 struct sctp_tcb * 1997 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1998 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1999 uint32_t vrf_id) 2000 { 2001 struct sctp_inpcb *inp = NULL; 2002 struct sctp_tcb *stcb; 2003 2004 SCTP_INP_INFO_RLOCK(); 2005 if (find_tcp_pool) { 2006 if (inp_p != NULL) { 2007 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2008 vrf_id); 2009 } else { 2010 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2011 vrf_id); 2012 } 2013 if (stcb != NULL) { 2014 SCTP_INP_INFO_RUNLOCK(); 2015 return (stcb); 2016 } 2017 } 2018 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2019 if (inp_p != NULL) { 2020 *inp_p = inp; 2021 } 2022 SCTP_INP_INFO_RUNLOCK(); 2023 if (inp == NULL) { 2024 return (NULL); 2025 } 2026 /* 2027 * ok, we have an endpoint, now lets find the assoc for it (if any) 2028 * we now place the source address or from in the to of the find 2029 * endpoint call. Since in reality this chain is used from the 2030 * inbound packet side. 2031 */ 2032 if (inp_p != NULL) { 2033 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2034 NULL); 2035 } else { 2036 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2037 NULL); 2038 } 2039 return (stcb); 2040 } 2041 2042 2043 /* 2044 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2045 * find all addresses that the sender has specified in any address list. Each 2046 * address will be used to lookup the TCB and see if one exits. 2047 */ 2048 static struct sctp_tcb * 2049 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2050 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2051 struct sockaddr *dst) 2052 { 2053 struct sctp_paramhdr *phdr, param_buf; 2054 #if defined(INET) || defined(INET6) 2055 struct sctp_tcb *stcb; 2056 uint16_t ptype; 2057 #endif 2058 uint16_t plen; 2059 #ifdef INET 2060 struct sockaddr_in sin4; 2061 #endif 2062 #ifdef INET6 2063 struct sockaddr_in6 sin6; 2064 #endif 2065 2066 #ifdef INET 2067 memset(&sin4, 0, sizeof(sin4)); 2068 sin4.sin_len = sizeof(sin4); 2069 sin4.sin_family = AF_INET; 2070 sin4.sin_port = sh->src_port; 2071 #endif 2072 #ifdef INET6 2073 memset(&sin6, 0, sizeof(sin6)); 2074 sin6.sin6_len = sizeof(sin6); 2075 sin6.sin6_family = AF_INET6; 2076 sin6.sin6_port = sh->src_port; 2077 #endif 2078 2079 offset += sizeof(struct sctp_init_chunk); 2080 2081 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2082 while (phdr != NULL) { 2083 /* now we must see if we want the parameter */ 2084 #if defined(INET) || defined(INET6) 2085 ptype = ntohs(phdr->param_type); 2086 #endif 2087 plen = ntohs(phdr->param_length); 2088 if (plen == 0) { 2089 break; 2090 } 2091 #ifdef INET 2092 if (ptype == SCTP_IPV4_ADDRESS && 2093 plen == sizeof(struct sctp_ipv4addr_param)) { 2094 /* Get the rest of the address */ 2095 struct sctp_ipv4addr_param ip4_param, *p4; 2096 2097 phdr = sctp_get_next_param(m, offset, 2098 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2099 if (phdr == NULL) { 2100 return (NULL); 2101 } 2102 p4 = (struct sctp_ipv4addr_param *)phdr; 2103 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2104 /* look it up */ 2105 stcb = sctp_findassociation_ep_addr(inp_p, 2106 (struct sockaddr *)&sin4, netp, dst, NULL); 2107 if (stcb != NULL) { 2108 return (stcb); 2109 } 2110 } 2111 #endif 2112 #ifdef INET6 2113 if (ptype == SCTP_IPV6_ADDRESS && 2114 plen == sizeof(struct sctp_ipv6addr_param)) { 2115 /* Get the rest of the address */ 2116 struct sctp_ipv6addr_param ip6_param, *p6; 2117 2118 phdr = sctp_get_next_param(m, offset, 2119 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2120 if (phdr == NULL) { 2121 return (NULL); 2122 } 2123 p6 = (struct sctp_ipv6addr_param *)phdr; 2124 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2125 /* look it up */ 2126 stcb = sctp_findassociation_ep_addr(inp_p, 2127 (struct sockaddr *)&sin6, netp, dst, NULL); 2128 if (stcb != NULL) { 2129 return (stcb); 2130 } 2131 } 2132 #endif 2133 offset += SCTP_SIZE32(plen); 2134 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2135 sizeof(param_buf)); 2136 } 2137 return (NULL); 2138 } 2139 2140 static struct sctp_tcb * 2141 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2142 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2143 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2144 { 2145 /* 2146 * Use my vtag to hash. If we find it we then verify the source addr 2147 * is in the assoc. If all goes well we save a bit on rec of a 2148 * packet. 2149 */ 2150 struct sctpasochead *head; 2151 struct sctp_nets *net; 2152 struct sctp_tcb *stcb; 2153 2154 SCTP_INP_INFO_RLOCK(); 2155 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2156 SCTP_BASE_INFO(hashasocmark))]; 2157 LIST_FOREACH(stcb, head, sctp_asocs) { 2158 SCTP_INP_RLOCK(stcb->sctp_ep); 2159 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2160 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2161 continue; 2162 } 2163 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2164 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2165 continue; 2166 } 2167 SCTP_TCB_LOCK(stcb); 2168 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2169 if (stcb->asoc.my_vtag == vtag) { 2170 /* candidate */ 2171 if (stcb->rport != rport) { 2172 SCTP_TCB_UNLOCK(stcb); 2173 continue; 2174 } 2175 if (stcb->sctp_ep->sctp_lport != lport) { 2176 SCTP_TCB_UNLOCK(stcb); 2177 continue; 2178 } 2179 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2180 SCTP_TCB_UNLOCK(stcb); 2181 continue; 2182 } 2183 /* RRS:Need toaddr check here */ 2184 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2185 /* Endpoint does not own this address */ 2186 SCTP_TCB_UNLOCK(stcb); 2187 continue; 2188 } 2189 if (remote_tag) { 2190 /* 2191 * If we have both vtags that's all we match 2192 * on 2193 */ 2194 if (stcb->asoc.peer_vtag == remote_tag) { 2195 /* 2196 * If both tags match we consider it 2197 * conclusive and check NO 2198 * source/destination addresses 2199 */ 2200 goto conclusive; 2201 } 2202 } 2203 if (skip_src_check) { 2204 conclusive: 2205 if (from) { 2206 *netp = sctp_findnet(stcb, from); 2207 } else { 2208 *netp = NULL; /* unknown */ 2209 } 2210 if (inp_p) 2211 *inp_p = stcb->sctp_ep; 2212 SCTP_INP_INFO_RUNLOCK(); 2213 return (stcb); 2214 } 2215 net = sctp_findnet(stcb, from); 2216 if (net) { 2217 /* yep its him. */ 2218 *netp = net; 2219 SCTP_STAT_INCR(sctps_vtagexpress); 2220 *inp_p = stcb->sctp_ep; 2221 SCTP_INP_INFO_RUNLOCK(); 2222 return (stcb); 2223 } else { 2224 /* 2225 * not him, this should only happen in rare 2226 * cases so I peg it. 2227 */ 2228 SCTP_STAT_INCR(sctps_vtagbogus); 2229 } 2230 } 2231 SCTP_TCB_UNLOCK(stcb); 2232 } 2233 SCTP_INP_INFO_RUNLOCK(); 2234 return (NULL); 2235 } 2236 2237 2238 /* 2239 * Find an association with the pointer to the inbound IP packet. This can be 2240 * a IPv4 or IPv6 packet. 2241 */ 2242 struct sctp_tcb * 2243 sctp_findassociation_addr(struct mbuf *m, int offset, 2244 struct sockaddr *src, struct sockaddr *dst, 2245 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2246 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2247 { 2248 struct sctp_tcb *stcb; 2249 struct sctp_inpcb *inp; 2250 2251 if (sh->v_tag) { 2252 /* we only go down this path if vtag is non-zero */ 2253 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2254 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2255 if (stcb) { 2256 return (stcb); 2257 } 2258 } 2259 2260 if (inp_p) { 2261 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2262 1, vrf_id); 2263 inp = *inp_p; 2264 } else { 2265 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2266 1, vrf_id); 2267 } 2268 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2269 if (stcb == NULL && inp) { 2270 /* Found a EP but not this address */ 2271 if ((ch->chunk_type == SCTP_INITIATION) || 2272 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2273 /*- 2274 * special hook, we do NOT return linp or an 2275 * association that is linked to an existing 2276 * association that is under the TCP pool (i.e. no 2277 * listener exists). The endpoint finding routine 2278 * will always find a listener before examining the 2279 * TCP pool. 2280 */ 2281 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2282 if (inp_p) { 2283 *inp_p = NULL; 2284 } 2285 return (NULL); 2286 } 2287 stcb = sctp_findassociation_special_addr(m, 2288 offset, sh, &inp, netp, dst); 2289 if (inp_p != NULL) { 2290 *inp_p = inp; 2291 } 2292 } 2293 } 2294 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2295 return (stcb); 2296 } 2297 2298 /* 2299 * lookup an association by an ASCONF lookup address. 2300 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2301 */ 2302 struct sctp_tcb * 2303 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2304 struct sockaddr *dst, struct sctphdr *sh, 2305 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2306 { 2307 struct sctp_tcb *stcb; 2308 union sctp_sockstore remote_store; 2309 struct sctp_paramhdr param_buf, *phdr; 2310 int ptype; 2311 int zero_address = 0; 2312 #ifdef INET 2313 struct sockaddr_in *sin; 2314 #endif 2315 #ifdef INET6 2316 struct sockaddr_in6 *sin6; 2317 #endif 2318 2319 memset(&remote_store, 0, sizeof(remote_store)); 2320 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2321 ¶m_buf, sizeof(struct sctp_paramhdr)); 2322 if (phdr == NULL) { 2323 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2324 __func__); 2325 return NULL; 2326 } 2327 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2328 /* get the correlation address */ 2329 switch (ptype) { 2330 #ifdef INET6 2331 case SCTP_IPV6_ADDRESS: 2332 { 2333 /* ipv6 address param */ 2334 struct sctp_ipv6addr_param *p6, p6_buf; 2335 2336 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2337 return NULL; 2338 } 2339 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2340 offset + sizeof(struct sctp_asconf_chunk), 2341 &p6_buf.ph, sizeof(p6_buf)); 2342 if (p6 == NULL) { 2343 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2344 __func__); 2345 return (NULL); 2346 } 2347 sin6 = &remote_store.sin6; 2348 sin6->sin6_family = AF_INET6; 2349 sin6->sin6_len = sizeof(*sin6); 2350 sin6->sin6_port = sh->src_port; 2351 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2352 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2353 zero_address = 1; 2354 break; 2355 } 2356 #endif 2357 #ifdef INET 2358 case SCTP_IPV4_ADDRESS: 2359 { 2360 /* ipv4 address param */ 2361 struct sctp_ipv4addr_param *p4, p4_buf; 2362 2363 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2364 return NULL; 2365 } 2366 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2367 offset + sizeof(struct sctp_asconf_chunk), 2368 &p4_buf.ph, sizeof(p4_buf)); 2369 if (p4 == NULL) { 2370 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2371 __func__); 2372 return (NULL); 2373 } 2374 sin = &remote_store.sin; 2375 sin->sin_family = AF_INET; 2376 sin->sin_len = sizeof(*sin); 2377 sin->sin_port = sh->src_port; 2378 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2379 if (sin->sin_addr.s_addr == INADDR_ANY) 2380 zero_address = 1; 2381 break; 2382 } 2383 #endif 2384 default: 2385 /* invalid address param type */ 2386 return NULL; 2387 } 2388 2389 if (zero_address) { 2390 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2391 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2392 if (stcb != NULL) { 2393 SCTP_INP_DECR_REF(*inp_p); 2394 } 2395 } else { 2396 stcb = sctp_findassociation_ep_addr(inp_p, 2397 &remote_store.sa, netp, 2398 dst, NULL); 2399 } 2400 return (stcb); 2401 } 2402 2403 2404 /* 2405 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2406 * addresses. This way if we don't get a bind we by default pick a ephemeral 2407 * port with all addresses bound. 2408 */ 2409 int 2410 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2411 { 2412 /* 2413 * we get called when a new endpoint starts up. We need to allocate 2414 * the sctp_inpcb structure from the zone and init it. Mark it as 2415 * unbound and find a port that we can use as an ephemeral with 2416 * INADDR_ANY. If the user binds later no problem we can then add in 2417 * the specific addresses. And setup the default parameters for the 2418 * EP. 2419 */ 2420 int i, error; 2421 struct sctp_inpcb *inp; 2422 struct sctp_pcb *m; 2423 struct timeval time; 2424 sctp_sharedkey_t *null_key; 2425 2426 error = 0; 2427 2428 SCTP_INP_INFO_WLOCK(); 2429 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2430 if (inp == NULL) { 2431 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2432 SCTP_INP_INFO_WUNLOCK(); 2433 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2434 return (ENOBUFS); 2435 } 2436 /* zap it */ 2437 memset(inp, 0, sizeof(*inp)); 2438 2439 /* bump generations */ 2440 /* setup socket pointers */ 2441 inp->sctp_socket = so; 2442 inp->ip_inp.inp.inp_socket = so; 2443 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2444 #ifdef INET6 2445 if (INP_SOCKAF(so) == AF_INET6) { 2446 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2447 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2448 } 2449 if (MODULE_GLOBAL(ip6_v6only)) { 2450 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2451 } 2452 } 2453 #endif 2454 inp->sctp_associd_counter = 1; 2455 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2456 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2457 inp->max_cwnd = 0; 2458 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2459 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2460 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2461 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2462 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2463 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2464 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2465 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2466 inp->idata_supported = 0; 2467 2468 inp->fibnum = so->so_fibnum; 2469 /* init the small hash table we use to track asocid <-> tcb */ 2470 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2471 if (inp->sctp_asocidhash == NULL) { 2472 crfree(inp->ip_inp.inp.inp_cred); 2473 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2474 SCTP_INP_INFO_WUNLOCK(); 2475 return (ENOBUFS); 2476 } 2477 SCTP_INCR_EP_COUNT(); 2478 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2479 SCTP_INP_INFO_WUNLOCK(); 2480 2481 so->so_pcb = (caddr_t)inp; 2482 2483 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2484 /* UDP style socket */ 2485 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2486 SCTP_PCB_FLAGS_UNBOUND); 2487 /* Be sure it is NON-BLOCKING IO for UDP */ 2488 /* SCTP_SET_SO_NBIO(so); */ 2489 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2490 /* TCP style socket */ 2491 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2492 SCTP_PCB_FLAGS_UNBOUND); 2493 /* Be sure we have blocking IO by default */ 2494 SOCK_LOCK(so); 2495 SCTP_CLEAR_SO_NBIO(so); 2496 SOCK_UNLOCK(so); 2497 } else { 2498 /* 2499 * unsupported socket type (RAW, etc)- in case we missed it 2500 * in protosw 2501 */ 2502 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2503 so->so_pcb = NULL; 2504 crfree(inp->ip_inp.inp.inp_cred); 2505 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2506 return (EOPNOTSUPP); 2507 } 2508 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2509 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2510 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2511 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2512 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2513 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2514 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2515 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2516 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2517 } 2518 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2519 &inp->sctp_hashmark); 2520 if (inp->sctp_tcbhash == NULL) { 2521 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2522 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2523 so->so_pcb = NULL; 2524 crfree(inp->ip_inp.inp.inp_cred); 2525 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2526 return (ENOBUFS); 2527 } 2528 inp->def_vrf_id = vrf_id; 2529 2530 SCTP_INP_INFO_WLOCK(); 2531 SCTP_INP_LOCK_INIT(inp); 2532 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2533 SCTP_INP_READ_INIT(inp); 2534 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2535 /* lock the new ep */ 2536 SCTP_INP_WLOCK(inp); 2537 2538 /* add it to the info area */ 2539 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2540 SCTP_INP_INFO_WUNLOCK(); 2541 2542 TAILQ_INIT(&inp->read_queue); 2543 LIST_INIT(&inp->sctp_addr_list); 2544 2545 LIST_INIT(&inp->sctp_asoc_list); 2546 2547 #ifdef SCTP_TRACK_FREED_ASOCS 2548 /* TEMP CODE */ 2549 LIST_INIT(&inp->sctp_asoc_free_list); 2550 #endif 2551 /* Init the timer structure for signature change */ 2552 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2553 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2554 2555 /* now init the actual endpoint default data */ 2556 m = &inp->sctp_ep; 2557 2558 /* setup the base timeout information */ 2559 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2560 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2561 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2562 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2563 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2564 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2565 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2566 /* all max/min max are in ms */ 2567 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2568 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2569 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2570 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2571 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2572 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2573 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2574 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2575 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2576 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2577 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2578 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2579 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2580 2581 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2582 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2583 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2584 /* number of streams to pre-open on a association */ 2585 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2586 2587 m->default_mtu = 0; 2588 /* Add adaptation cookie */ 2589 m->adaptation_layer_indicator = 0; 2590 m->adaptation_layer_indicator_provided = 0; 2591 2592 /* seed random number generator */ 2593 m->random_counter = 1; 2594 m->store_at = SCTP_SIGNATURE_SIZE; 2595 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2596 sctp_fill_random_store(m); 2597 2598 /* Minimum cookie size */ 2599 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2600 sizeof(struct sctp_state_cookie); 2601 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2602 2603 /* Setup the initial secret */ 2604 (void)SCTP_GETTIME_TIMEVAL(&time); 2605 m->time_of_secret_change = time.tv_sec; 2606 2607 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2608 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2609 } 2610 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2611 2612 /* How long is a cookie good for ? */ 2613 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2614 /* 2615 * Initialize authentication parameters 2616 */ 2617 m->local_hmacs = sctp_default_supported_hmaclist(); 2618 m->local_auth_chunks = sctp_alloc_chunklist(); 2619 if (inp->asconf_supported) { 2620 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2621 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2622 } 2623 m->default_dscp = 0; 2624 #ifdef INET6 2625 m->default_flowlabel = 0; 2626 #endif 2627 m->port = 0; /* encapsulation disabled by default */ 2628 LIST_INIT(&m->shared_keys); 2629 /* add default NULL key as key id 0 */ 2630 null_key = sctp_alloc_sharedkey(); 2631 sctp_insert_sharedkey(&m->shared_keys, null_key); 2632 SCTP_INP_WUNLOCK(inp); 2633 #ifdef SCTP_LOG_CLOSING 2634 sctp_log_closing(inp, NULL, 12); 2635 #endif 2636 return (error); 2637 } 2638 2639 2640 void 2641 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2642 struct sctp_tcb *stcb) 2643 { 2644 struct sctp_nets *net; 2645 uint16_t lport, rport; 2646 struct sctppcbhead *head; 2647 struct sctp_laddr *laddr, *oladdr; 2648 2649 atomic_add_int(&stcb->asoc.refcnt, 1); 2650 SCTP_TCB_UNLOCK(stcb); 2651 SCTP_INP_INFO_WLOCK(); 2652 SCTP_INP_WLOCK(old_inp); 2653 SCTP_INP_WLOCK(new_inp); 2654 SCTP_TCB_LOCK(stcb); 2655 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2656 2657 new_inp->sctp_ep.time_of_secret_change = 2658 old_inp->sctp_ep.time_of_secret_change; 2659 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2660 sizeof(old_inp->sctp_ep.secret_key)); 2661 new_inp->sctp_ep.current_secret_number = 2662 old_inp->sctp_ep.current_secret_number; 2663 new_inp->sctp_ep.last_secret_number = 2664 old_inp->sctp_ep.last_secret_number; 2665 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2666 2667 /* make it so new data pours into the new socket */ 2668 stcb->sctp_socket = new_inp->sctp_socket; 2669 stcb->sctp_ep = new_inp; 2670 2671 /* Copy the port across */ 2672 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2673 rport = stcb->rport; 2674 /* Pull the tcb from the old association */ 2675 LIST_REMOVE(stcb, sctp_tcbhash); 2676 LIST_REMOVE(stcb, sctp_tcblist); 2677 if (stcb->asoc.in_asocid_hash) { 2678 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2679 } 2680 /* Now insert the new_inp into the TCP connected hash */ 2681 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2682 2683 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2684 /* Its safe to access */ 2685 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2686 2687 /* Now move the tcb into the endpoint list */ 2688 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2689 /* 2690 * Question, do we even need to worry about the ep-hash since we 2691 * only have one connection? Probably not :> so lets get rid of it 2692 * and not suck up any kernel memory in that. 2693 */ 2694 if (stcb->asoc.in_asocid_hash) { 2695 struct sctpasochead *lhd; 2696 2697 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2698 new_inp->hashasocidmark)]; 2699 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2700 } 2701 /* Ok. Let's restart timer. */ 2702 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2703 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2704 stcb, net); 2705 } 2706 2707 SCTP_INP_INFO_WUNLOCK(); 2708 if (new_inp->sctp_tcbhash != NULL) { 2709 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2710 new_inp->sctp_tcbhash = NULL; 2711 } 2712 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2713 /* Subset bound, so copy in the laddr list from the old_inp */ 2714 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2715 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2716 if (laddr == NULL) { 2717 /* 2718 * Gak, what can we do? This assoc is really 2719 * HOSED. We probably should send an abort 2720 * here. 2721 */ 2722 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2723 continue; 2724 } 2725 SCTP_INCR_LADDR_COUNT(); 2726 memset(laddr, 0, sizeof(*laddr)); 2727 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2728 laddr->ifa = oladdr->ifa; 2729 atomic_add_int(&laddr->ifa->refcount, 1); 2730 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2731 sctp_nxt_addr); 2732 new_inp->laddr_count++; 2733 if (oladdr == stcb->asoc.last_used_address) { 2734 stcb->asoc.last_used_address = laddr; 2735 } 2736 } 2737 } 2738 /* 2739 * Now any running timers need to be adjusted since we really don't 2740 * care if they are running or not just blast in the new_inp into 2741 * all of them. 2742 */ 2743 2744 stcb->asoc.dack_timer.ep = (void *)new_inp; 2745 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2746 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2747 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2748 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2749 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2750 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2751 /* now what about the nets? */ 2752 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2753 net->pmtu_timer.ep = (void *)new_inp; 2754 net->hb_timer.ep = (void *)new_inp; 2755 net->rxt_timer.ep = (void *)new_inp; 2756 } 2757 SCTP_INP_WUNLOCK(new_inp); 2758 SCTP_INP_WUNLOCK(old_inp); 2759 } 2760 2761 /* 2762 * insert an laddr entry with the given ifa for the desired list 2763 */ 2764 static int 2765 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2766 { 2767 struct sctp_laddr *laddr; 2768 2769 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2770 if (laddr == NULL) { 2771 /* out of memory? */ 2772 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2773 return (EINVAL); 2774 } 2775 SCTP_INCR_LADDR_COUNT(); 2776 memset(laddr, 0, sizeof(*laddr)); 2777 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2778 laddr->ifa = ifa; 2779 laddr->action = act; 2780 atomic_add_int(&ifa->refcount, 1); 2781 /* insert it */ 2782 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2783 2784 return (0); 2785 } 2786 2787 /* 2788 * Remove an laddr entry from the local address list (on an assoc) 2789 */ 2790 static void 2791 sctp_remove_laddr(struct sctp_laddr *laddr) 2792 { 2793 2794 /* remove from the list */ 2795 LIST_REMOVE(laddr, sctp_nxt_addr); 2796 sctp_free_ifa(laddr->ifa); 2797 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2798 SCTP_DECR_LADDR_COUNT(); 2799 } 2800 2801 2802 2803 /* sctp_ifap is used to bypass normal local address validation checks */ 2804 int 2805 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2806 struct sctp_ifa *sctp_ifap, struct thread *p) 2807 { 2808 /* bind a ep to a socket address */ 2809 struct sctppcbhead *head; 2810 struct sctp_inpcb *inp, *inp_tmp; 2811 struct inpcb *ip_inp; 2812 int port_reuse_active = 0; 2813 int bindall; 2814 uint16_t lport; 2815 int error; 2816 uint32_t vrf_id; 2817 2818 lport = 0; 2819 bindall = 1; 2820 inp = (struct sctp_inpcb *)so->so_pcb; 2821 ip_inp = (struct inpcb *)so->so_pcb; 2822 #ifdef SCTP_DEBUG 2823 if (addr) { 2824 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2825 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2826 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2827 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2828 } 2829 #endif 2830 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2831 /* already did a bind, subsequent binds NOT allowed ! */ 2832 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2833 return (EINVAL); 2834 } 2835 #ifdef INVARIANTS 2836 if (p == NULL) 2837 panic("null proc/thread"); 2838 #endif 2839 if (addr != NULL) { 2840 switch (addr->sa_family) { 2841 #ifdef INET 2842 case AF_INET: 2843 { 2844 struct sockaddr_in *sin; 2845 2846 /* IPV6_V6ONLY socket? */ 2847 if (SCTP_IPV6_V6ONLY(inp)) { 2848 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2849 return (EINVAL); 2850 } 2851 if (addr->sa_len != sizeof(*sin)) { 2852 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2853 return (EINVAL); 2854 } 2855 2856 sin = (struct sockaddr_in *)addr; 2857 lport = sin->sin_port; 2858 /* 2859 * For LOOPBACK the prison_local_ip4() call 2860 * will transmute the ip address to the 2861 * proper value. 2862 */ 2863 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2864 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2865 return (error); 2866 } 2867 if (sin->sin_addr.s_addr != INADDR_ANY) { 2868 bindall = 0; 2869 } 2870 break; 2871 } 2872 #endif 2873 #ifdef INET6 2874 case AF_INET6: 2875 { 2876 /* 2877 * Only for pure IPv6 Address. (No IPv4 2878 * Mapped!) 2879 */ 2880 struct sockaddr_in6 *sin6; 2881 2882 sin6 = (struct sockaddr_in6 *)addr; 2883 2884 if (addr->sa_len != sizeof(*sin6)) { 2885 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2886 return (EINVAL); 2887 } 2888 lport = sin6->sin6_port; 2889 /* 2890 * For LOOPBACK the prison_local_ip6() call 2891 * will transmute the ipv6 address to the 2892 * proper value. 2893 */ 2894 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2895 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2896 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2897 return (error); 2898 } 2899 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2900 bindall = 0; 2901 /* KAME hack: embed scopeid */ 2902 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2903 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2904 return (EINVAL); 2905 } 2906 } 2907 /* this must be cleared for ifa_ifwithaddr() */ 2908 sin6->sin6_scope_id = 0; 2909 break; 2910 } 2911 #endif 2912 default: 2913 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2914 return (EAFNOSUPPORT); 2915 } 2916 } 2917 SCTP_INP_INFO_WLOCK(); 2918 SCTP_INP_WLOCK(inp); 2919 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2920 vrf_id = inp->def_vrf_id; 2921 2922 /* increase our count due to the unlock we do */ 2923 SCTP_INP_INCR_REF(inp); 2924 if (lport) { 2925 /* 2926 * Did the caller specify a port? if so we must see if an ep 2927 * already has this one bound. 2928 */ 2929 /* got to be root to get at low ports */ 2930 if (ntohs(lport) < IPPORT_RESERVED) { 2931 if ((p != NULL) && ((error = 2932 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2933 ) != 0)) { 2934 SCTP_INP_DECR_REF(inp); 2935 SCTP_INP_WUNLOCK(inp); 2936 SCTP_INP_INFO_WUNLOCK(); 2937 return (error); 2938 } 2939 } 2940 SCTP_INP_WUNLOCK(inp); 2941 if (bindall) { 2942 vrf_id = inp->def_vrf_id; 2943 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2944 if (inp_tmp != NULL) { 2945 /* 2946 * lock guy returned and lower count note 2947 * that we are not bound so inp_tmp should 2948 * NEVER be inp. And it is this inp 2949 * (inp_tmp) that gets the reference bump, 2950 * so we must lower it. 2951 */ 2952 SCTP_INP_DECR_REF(inp_tmp); 2953 /* unlock info */ 2954 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2955 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2956 /* 2957 * Ok, must be one-2-one and 2958 * allowing port re-use 2959 */ 2960 port_reuse_active = 1; 2961 goto continue_anyway; 2962 } 2963 SCTP_INP_DECR_REF(inp); 2964 SCTP_INP_INFO_WUNLOCK(); 2965 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2966 return (EADDRINUSE); 2967 } 2968 } else { 2969 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2970 if (inp_tmp != NULL) { 2971 /* 2972 * lock guy returned and lower count note 2973 * that we are not bound so inp_tmp should 2974 * NEVER be inp. And it is this inp 2975 * (inp_tmp) that gets the reference bump, 2976 * so we must lower it. 2977 */ 2978 SCTP_INP_DECR_REF(inp_tmp); 2979 /* unlock info */ 2980 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2981 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2982 /* 2983 * Ok, must be one-2-one and 2984 * allowing port re-use 2985 */ 2986 port_reuse_active = 1; 2987 goto continue_anyway; 2988 } 2989 SCTP_INP_DECR_REF(inp); 2990 SCTP_INP_INFO_WUNLOCK(); 2991 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2992 return (EADDRINUSE); 2993 } 2994 } 2995 continue_anyway: 2996 SCTP_INP_WLOCK(inp); 2997 if (bindall) { 2998 /* verify that no lport is not used by a singleton */ 2999 if ((port_reuse_active == 0) && 3000 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3001 /* Sorry someone already has this one bound */ 3002 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3003 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3004 port_reuse_active = 1; 3005 } else { 3006 SCTP_INP_DECR_REF(inp); 3007 SCTP_INP_WUNLOCK(inp); 3008 SCTP_INP_INFO_WUNLOCK(); 3009 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3010 return (EADDRINUSE); 3011 } 3012 } 3013 } 3014 } else { 3015 uint16_t first, last, candidate; 3016 uint16_t count; 3017 int done; 3018 3019 if (ip_inp->inp_flags & INP_HIGHPORT) { 3020 first = MODULE_GLOBAL(ipport_hifirstauto); 3021 last = MODULE_GLOBAL(ipport_hilastauto); 3022 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3023 if (p && (error = 3024 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3025 )) { 3026 SCTP_INP_DECR_REF(inp); 3027 SCTP_INP_WUNLOCK(inp); 3028 SCTP_INP_INFO_WUNLOCK(); 3029 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3030 return (error); 3031 } 3032 first = MODULE_GLOBAL(ipport_lowfirstauto); 3033 last = MODULE_GLOBAL(ipport_lowlastauto); 3034 } else { 3035 first = MODULE_GLOBAL(ipport_firstauto); 3036 last = MODULE_GLOBAL(ipport_lastauto); 3037 } 3038 if (first > last) { 3039 uint16_t temp; 3040 3041 temp = first; 3042 first = last; 3043 last = temp; 3044 } 3045 count = last - first + 1; /* number of candidates */ 3046 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3047 3048 done = 0; 3049 while (!done) { 3050 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3051 done = 1; 3052 } 3053 if (!done) { 3054 if (--count == 0) { 3055 SCTP_INP_DECR_REF(inp); 3056 SCTP_INP_WUNLOCK(inp); 3057 SCTP_INP_INFO_WUNLOCK(); 3058 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3059 return (EADDRINUSE); 3060 } 3061 if (candidate == last) 3062 candidate = first; 3063 else 3064 candidate = candidate + 1; 3065 } 3066 } 3067 lport = htons(candidate); 3068 } 3069 SCTP_INP_DECR_REF(inp); 3070 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3071 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3072 /* 3073 * this really should not happen. The guy did a non-blocking 3074 * bind and then did a close at the same time. 3075 */ 3076 SCTP_INP_WUNLOCK(inp); 3077 SCTP_INP_INFO_WUNLOCK(); 3078 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3079 return (EINVAL); 3080 } 3081 /* ok we look clear to give out this port, so lets setup the binding */ 3082 if (bindall) { 3083 /* binding to all addresses, so just set in the proper flags */ 3084 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3085 /* set the automatic addr changes from kernel flag */ 3086 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3087 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3088 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3089 } else { 3090 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3091 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3092 } 3093 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3094 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3095 } else { 3096 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3097 } 3098 /* 3099 * set the automatic mobility_base from kernel flag (by 3100 * micchie) 3101 */ 3102 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3103 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3105 } else { 3106 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3107 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3108 } 3109 /* 3110 * set the automatic mobility_fasthandoff from kernel flag 3111 * (by micchie) 3112 */ 3113 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3114 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3115 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3116 } else { 3117 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3118 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3119 } 3120 } else { 3121 /* 3122 * bind specific, make sure flags is off and add a new 3123 * address structure to the sctp_addr_list inside the ep 3124 * structure. 3125 * 3126 * We will need to allocate one and insert it at the head. 3127 * The socketopt call can just insert new addresses in there 3128 * as well. It will also have to do the embed scope kame 3129 * hack too (before adding). 3130 */ 3131 struct sctp_ifa *ifa; 3132 union sctp_sockstore store; 3133 3134 memset(&store, 0, sizeof(store)); 3135 switch (addr->sa_family) { 3136 #ifdef INET 3137 case AF_INET: 3138 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3139 store.sin.sin_port = 0; 3140 break; 3141 #endif 3142 #ifdef INET6 3143 case AF_INET6: 3144 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3145 store.sin6.sin6_port = 0; 3146 break; 3147 #endif 3148 default: 3149 break; 3150 } 3151 /* 3152 * first find the interface with the bound address need to 3153 * zero out the port to find the address! yuck! can't do 3154 * this earlier since need port for sctp_pcb_findep() 3155 */ 3156 if (sctp_ifap != NULL) { 3157 ifa = sctp_ifap; 3158 } else { 3159 /* 3160 * Note for BSD we hit here always other O/S's will 3161 * pass things in via the sctp_ifap argument 3162 * (Panda). 3163 */ 3164 ifa = sctp_find_ifa_by_addr(&store.sa, 3165 vrf_id, SCTP_ADDR_NOT_LOCKED); 3166 } 3167 if (ifa == NULL) { 3168 /* Can't find an interface with that address */ 3169 SCTP_INP_WUNLOCK(inp); 3170 SCTP_INP_INFO_WUNLOCK(); 3171 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3172 return (EADDRNOTAVAIL); 3173 } 3174 #ifdef INET6 3175 if (addr->sa_family == AF_INET6) { 3176 /* GAK, more FIXME IFA lock? */ 3177 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3178 /* Can't bind a non-existent addr. */ 3179 SCTP_INP_WUNLOCK(inp); 3180 SCTP_INP_INFO_WUNLOCK(); 3181 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3182 return (EINVAL); 3183 } 3184 } 3185 #endif 3186 /* we're not bound all */ 3187 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3188 /* allow bindx() to send ASCONF's for binding changes */ 3189 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3190 /* clear automatic addr changes from kernel flag */ 3191 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3192 3193 /* add this address to the endpoint list */ 3194 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3195 if (error != 0) { 3196 SCTP_INP_WUNLOCK(inp); 3197 SCTP_INP_INFO_WUNLOCK(); 3198 return (error); 3199 } 3200 inp->laddr_count++; 3201 } 3202 /* find the bucket */ 3203 if (port_reuse_active) { 3204 /* Put it into tcp 1-2-1 hash */ 3205 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3206 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3207 } else { 3208 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3209 } 3210 /* put it in the bucket */ 3211 LIST_INSERT_HEAD(head, inp, sctp_hash); 3212 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3213 (void *)head, ntohs(lport), port_reuse_active); 3214 /* set in the port */ 3215 inp->sctp_lport = lport; 3216 3217 /* turn off just the unbound flag */ 3218 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3219 SCTP_INP_WUNLOCK(inp); 3220 SCTP_INP_INFO_WUNLOCK(); 3221 return (0); 3222 } 3223 3224 3225 static void 3226 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3227 { 3228 struct sctp_iterator *it, *nit; 3229 3230 /* 3231 * We enter with the only the ITERATOR_LOCK in place and a write 3232 * lock on the inp_info stuff. 3233 */ 3234 it = sctp_it_ctl.cur_it; 3235 if (it && (it->vn != curvnet)) { 3236 /* Its not looking at our VNET */ 3237 return; 3238 } 3239 if (it && (it->inp == inp)) { 3240 /* 3241 * This is tricky and we hold the iterator lock, but when it 3242 * returns and gets the lock (when we release it) the 3243 * iterator will try to operate on inp. We need to stop that 3244 * from happening. But of course the iterator has a 3245 * reference on the stcb and inp. We can mark it and it will 3246 * stop. 3247 * 3248 * If its a single iterator situation, we set the end 3249 * iterator flag. Otherwise we set the iterator to go to the 3250 * next inp. 3251 * 3252 */ 3253 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3254 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3255 } else { 3256 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3257 } 3258 } 3259 /* 3260 * Now go through and remove any single reference to our inp that 3261 * may be still pending on the list 3262 */ 3263 SCTP_IPI_ITERATOR_WQ_LOCK(); 3264 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3265 if (it->vn != curvnet) { 3266 continue; 3267 } 3268 if (it->inp == inp) { 3269 /* This one points to me is it inp specific? */ 3270 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3271 /* Remove and free this one */ 3272 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3273 it, sctp_nxt_itr); 3274 if (it->function_atend != NULL) { 3275 (*it->function_atend) (it->pointer, it->val); 3276 } 3277 SCTP_FREE(it, SCTP_M_ITER); 3278 } else { 3279 it->inp = LIST_NEXT(it->inp, sctp_list); 3280 if (it->inp) { 3281 SCTP_INP_INCR_REF(it->inp); 3282 } 3283 } 3284 /* 3285 * When its put in the refcnt is incremented so decr 3286 * it 3287 */ 3288 SCTP_INP_DECR_REF(inp); 3289 } 3290 } 3291 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3292 } 3293 3294 /* release sctp_inpcb unbind the port */ 3295 void 3296 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3297 { 3298 /* 3299 * Here we free a endpoint. We must find it (if it is in the Hash 3300 * table) and remove it from there. Then we must also find it in the 3301 * overall list and remove it from there. After all removals are 3302 * complete then any timer has to be stopped. Then start the actual 3303 * freeing. a) Any local lists. b) Any associations. c) The hash of 3304 * all associations. d) finally the ep itself. 3305 */ 3306 struct sctp_tcb *asoc, *nasoc; 3307 struct sctp_laddr *laddr, *nladdr; 3308 struct inpcb *ip_pcb; 3309 struct socket *so; 3310 int being_refed = 0; 3311 struct sctp_queued_to_read *sq, *nsq; 3312 int cnt; 3313 sctp_sharedkey_t *shared_key, *nshared_key; 3314 3315 3316 #ifdef SCTP_LOG_CLOSING 3317 sctp_log_closing(inp, NULL, 0); 3318 #endif 3319 SCTP_ITERATOR_LOCK(); 3320 /* mark any iterators on the list or being processed */ 3321 sctp_iterator_inp_being_freed(inp); 3322 SCTP_ITERATOR_UNLOCK(); 3323 so = inp->sctp_socket; 3324 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3325 /* been here before.. eeks.. get out of here */ 3326 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3327 #ifdef SCTP_LOG_CLOSING 3328 sctp_log_closing(inp, NULL, 1); 3329 #endif 3330 return; 3331 } 3332 SCTP_ASOC_CREATE_LOCK(inp); 3333 SCTP_INP_INFO_WLOCK(); 3334 3335 SCTP_INP_WLOCK(inp); 3336 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3337 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3338 /* socket is gone, so no more wakeups allowed */ 3339 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3340 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3341 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3342 3343 } 3344 /* First time through we have the socket lock, after that no more. */ 3345 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3346 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3347 3348 if (inp->control) { 3349 sctp_m_freem(inp->control); 3350 inp->control = NULL; 3351 } 3352 if (inp->pkt) { 3353 sctp_m_freem(inp->pkt); 3354 inp->pkt = NULL; 3355 } 3356 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3357 * here but I will be nice :> (i.e. 3358 * ip_pcb = ep;) */ 3359 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3360 int cnt_in_sd; 3361 3362 cnt_in_sd = 0; 3363 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3364 SCTP_TCB_LOCK(asoc); 3365 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3366 /* Skip guys being freed */ 3367 cnt_in_sd++; 3368 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3369 /* 3370 * Special case - we did not start a 3371 * kill timer on the asoc due to it 3372 * was not closed. So go ahead and 3373 * start it now. 3374 */ 3375 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3376 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3377 } 3378 SCTP_TCB_UNLOCK(asoc); 3379 continue; 3380 } 3381 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3382 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3383 (asoc->asoc.total_output_queue_size == 0)) { 3384 /* 3385 * If we have data in queue, we don't want 3386 * to just free since the app may have done, 3387 * send()/close or connect/send/close. And 3388 * it wants the data to get across first. 3389 */ 3390 /* Just abandon things in the front states */ 3391 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3392 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3393 cnt_in_sd++; 3394 } 3395 continue; 3396 } 3397 /* Disconnect the socket please */ 3398 asoc->sctp_socket = NULL; 3399 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3400 if ((asoc->asoc.size_on_reasm_queue > 0) || 3401 (asoc->asoc.control_pdapi) || 3402 (asoc->asoc.size_on_all_streams > 0) || 3403 (so && (so->so_rcv.sb_cc > 0))) { 3404 /* Left with Data unread */ 3405 struct mbuf *op_err; 3406 3407 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3408 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3409 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3410 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3411 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3412 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3413 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3414 } 3415 if (sctp_free_assoc(inp, asoc, 3416 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3417 cnt_in_sd++; 3418 } 3419 continue; 3420 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3421 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3422 (asoc->asoc.stream_queue_cnt == 0)) { 3423 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3424 goto abort_anyway; 3425 } 3426 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3427 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3428 struct sctp_nets *netp; 3429 3430 /* 3431 * there is nothing queued to send, 3432 * so I send shutdown 3433 */ 3434 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3435 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3436 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3437 } 3438 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3439 sctp_stop_timers_for_shutdown(asoc); 3440 if (asoc->asoc.alternate) { 3441 netp = asoc->asoc.alternate; 3442 } else { 3443 netp = asoc->asoc.primary_destination; 3444 } 3445 sctp_send_shutdown(asoc, netp); 3446 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3447 netp); 3448 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3449 asoc->asoc.primary_destination); 3450 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3451 } 3452 } else { 3453 /* mark into shutdown pending */ 3454 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3455 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3456 asoc->asoc.primary_destination); 3457 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3458 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3459 } 3460 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3461 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3462 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3463 struct mbuf *op_err; 3464 3465 abort_anyway: 3466 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3467 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3468 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3469 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3470 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3471 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3472 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3473 } 3474 if (sctp_free_assoc(inp, asoc, 3475 SCTP_PCBFREE_NOFORCE, 3476 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3477 cnt_in_sd++; 3478 } 3479 continue; 3480 } else { 3481 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3482 } 3483 } 3484 cnt_in_sd++; 3485 SCTP_TCB_UNLOCK(asoc); 3486 } 3487 /* now is there some left in our SHUTDOWN state? */ 3488 if (cnt_in_sd) { 3489 #ifdef SCTP_LOG_CLOSING 3490 sctp_log_closing(inp, NULL, 2); 3491 #endif 3492 inp->sctp_socket = NULL; 3493 SCTP_INP_WUNLOCK(inp); 3494 SCTP_ASOC_CREATE_UNLOCK(inp); 3495 SCTP_INP_INFO_WUNLOCK(); 3496 return; 3497 } 3498 } 3499 inp->sctp_socket = NULL; 3500 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3501 SCTP_PCB_FLAGS_UNBOUND) { 3502 /* 3503 * ok, this guy has been bound. It's port is somewhere in 3504 * the SCTP_BASE_INFO(hash table). Remove it! 3505 */ 3506 LIST_REMOVE(inp, sctp_hash); 3507 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3508 } 3509 3510 /* 3511 * If there is a timer running to kill us, forget it, since it may 3512 * have a contest on the INP lock.. which would cause us to die ... 3513 */ 3514 cnt = 0; 3515 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3516 SCTP_TCB_LOCK(asoc); 3517 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3518 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3519 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3520 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3521 } 3522 cnt++; 3523 SCTP_TCB_UNLOCK(asoc); 3524 continue; 3525 } 3526 /* Free associations that are NOT killing us */ 3527 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3528 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3529 struct mbuf *op_err; 3530 3531 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3532 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3533 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3534 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3535 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3536 cnt++; 3537 SCTP_TCB_UNLOCK(asoc); 3538 continue; 3539 } 3540 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3541 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3542 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3543 } 3544 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3545 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3546 cnt++; 3547 } 3548 } 3549 if (cnt) { 3550 /* Ok we have someone out there that will kill us */ 3551 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3552 #ifdef SCTP_LOG_CLOSING 3553 sctp_log_closing(inp, NULL, 3); 3554 #endif 3555 SCTP_INP_WUNLOCK(inp); 3556 SCTP_ASOC_CREATE_UNLOCK(inp); 3557 SCTP_INP_INFO_WUNLOCK(); 3558 return; 3559 } 3560 if (SCTP_INP_LOCK_CONTENDED(inp)) 3561 being_refed++; 3562 if (SCTP_INP_READ_CONTENDED(inp)) 3563 being_refed++; 3564 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3565 being_refed++; 3566 3567 if ((inp->refcount) || 3568 (being_refed) || 3569 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3570 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3571 #ifdef SCTP_LOG_CLOSING 3572 sctp_log_closing(inp, NULL, 4); 3573 #endif 3574 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3575 SCTP_INP_WUNLOCK(inp); 3576 SCTP_ASOC_CREATE_UNLOCK(inp); 3577 SCTP_INP_INFO_WUNLOCK(); 3578 return; 3579 } 3580 inp->sctp_ep.signature_change.type = 0; 3581 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3582 /* 3583 * Remove it from the list .. last thing we need a lock for. 3584 */ 3585 LIST_REMOVE(inp, sctp_list); 3586 SCTP_INP_WUNLOCK(inp); 3587 SCTP_ASOC_CREATE_UNLOCK(inp); 3588 SCTP_INP_INFO_WUNLOCK(); 3589 /* 3590 * Now we release all locks. Since this INP cannot be found anymore 3591 * except possibly by the kill timer that might be running. We call 3592 * the drain function here. It should hit the case were it sees the 3593 * ACTIVE flag cleared and exit out freeing us to proceed and 3594 * destroy everything. 3595 */ 3596 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3597 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3598 } else { 3599 /* Probably un-needed */ 3600 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3601 } 3602 3603 #ifdef SCTP_LOG_CLOSING 3604 sctp_log_closing(inp, NULL, 5); 3605 #endif 3606 3607 3608 if ((inp->sctp_asocidhash) != NULL) { 3609 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3610 inp->sctp_asocidhash = NULL; 3611 } 3612 /* sa_ignore FREED_MEMORY */ 3613 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3614 /* Its only abandoned if it had data left */ 3615 if (sq->length) 3616 SCTP_STAT_INCR(sctps_left_abandon); 3617 3618 TAILQ_REMOVE(&inp->read_queue, sq, next); 3619 sctp_free_remote_addr(sq->whoFrom); 3620 if (so) 3621 so->so_rcv.sb_cc -= sq->length; 3622 if (sq->data) { 3623 sctp_m_freem(sq->data); 3624 sq->data = NULL; 3625 } 3626 /* 3627 * no need to free the net count, since at this point all 3628 * assoc's are gone. 3629 */ 3630 sctp_free_a_readq(NULL, sq); 3631 } 3632 /* Now the sctp_pcb things */ 3633 /* 3634 * free each asoc if it is not already closed/free. we can't use the 3635 * macro here since le_next will get freed as part of the 3636 * sctp_free_assoc() call. 3637 */ 3638 if (ip_pcb->inp_options) { 3639 (void)sctp_m_free(ip_pcb->inp_options); 3640 ip_pcb->inp_options = 0; 3641 } 3642 3643 3644 #ifdef INET6 3645 if (ip_pcb->inp_vflag & INP_IPV6) { 3646 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3647 } 3648 #endif /* INET6 */ 3649 ip_pcb->inp_vflag = 0; 3650 /* free up authentication fields */ 3651 if (inp->sctp_ep.local_auth_chunks != NULL) 3652 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3653 if (inp->sctp_ep.local_hmacs != NULL) 3654 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3655 3656 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3657 LIST_REMOVE(shared_key, next); 3658 sctp_free_sharedkey(shared_key); 3659 /* sa_ignore FREED_MEMORY */ 3660 } 3661 3662 /* 3663 * if we have an address list the following will free the list of 3664 * ifaddr's that are set into this ep. Again macro limitations here, 3665 * since the LIST_FOREACH could be a bad idea. 3666 */ 3667 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3668 sctp_remove_laddr(laddr); 3669 } 3670 3671 #ifdef SCTP_TRACK_FREED_ASOCS 3672 /* TEMP CODE */ 3673 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3674 LIST_REMOVE(asoc, sctp_tcblist); 3675 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3676 SCTP_DECR_ASOC_COUNT(); 3677 } 3678 /* *** END TEMP CODE *** */ 3679 #endif 3680 /* Now lets see about freeing the EP hash table. */ 3681 if (inp->sctp_tcbhash != NULL) { 3682 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3683 inp->sctp_tcbhash = NULL; 3684 } 3685 /* Now we must put the ep memory back into the zone pool */ 3686 crfree(inp->ip_inp.inp.inp_cred); 3687 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3688 SCTP_INP_LOCK_DESTROY(inp); 3689 SCTP_INP_READ_DESTROY(inp); 3690 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3691 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3692 SCTP_DECR_EP_COUNT(); 3693 } 3694 3695 3696 struct sctp_nets * 3697 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3698 { 3699 struct sctp_nets *net; 3700 3701 /* locate the address */ 3702 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3703 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3704 return (net); 3705 } 3706 return (NULL); 3707 } 3708 3709 3710 int 3711 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3712 { 3713 struct sctp_ifa *sctp_ifa; 3714 3715 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3716 if (sctp_ifa) { 3717 return (1); 3718 } else { 3719 return (0); 3720 } 3721 } 3722 3723 /* 3724 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3725 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3726 * stats of stuff. 3727 */ 3728 int 3729 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3730 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3731 { 3732 /* 3733 * The following is redundant to the same lines in the 3734 * sctp_aloc_assoc() but is needed since others call the add address 3735 * function 3736 */ 3737 struct sctp_nets *net, *netfirst; 3738 int addr_inscope; 3739 3740 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3741 from); 3742 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3743 3744 netfirst = sctp_findnet(stcb, newaddr); 3745 if (netfirst) { 3746 /* 3747 * Lie and return ok, we don't want to make the association 3748 * go away for this behavior. It will happen in the TCP 3749 * model in a connected socket. It does not reach the hash 3750 * table until after the association is built so it can't be 3751 * found. Mark as reachable, since the initial creation will 3752 * have been cleared and the NOT_IN_ASSOC flag will have 3753 * been added... and we don't want to end up removing it 3754 * back out. 3755 */ 3756 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3757 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3758 SCTP_ADDR_UNCONFIRMED); 3759 } else { 3760 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3761 } 3762 3763 return (0); 3764 } 3765 addr_inscope = 1; 3766 switch (newaddr->sa_family) { 3767 #ifdef INET 3768 case AF_INET: 3769 { 3770 struct sockaddr_in *sin; 3771 3772 sin = (struct sockaddr_in *)newaddr; 3773 if (sin->sin_addr.s_addr == 0) { 3774 /* Invalid address */ 3775 return (-1); 3776 } 3777 /* zero out the zero area */ 3778 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3779 3780 /* assure len is set */ 3781 sin->sin_len = sizeof(struct sockaddr_in); 3782 if (set_scope) { 3783 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3784 stcb->asoc.scope.ipv4_local_scope = 1; 3785 } 3786 } else { 3787 /* Validate the address is in scope */ 3788 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3789 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3790 addr_inscope = 0; 3791 } 3792 } 3793 break; 3794 } 3795 #endif 3796 #ifdef INET6 3797 case AF_INET6: 3798 { 3799 struct sockaddr_in6 *sin6; 3800 3801 sin6 = (struct sockaddr_in6 *)newaddr; 3802 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3803 /* Invalid address */ 3804 return (-1); 3805 } 3806 /* assure len is set */ 3807 sin6->sin6_len = sizeof(struct sockaddr_in6); 3808 if (set_scope) { 3809 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3810 stcb->asoc.scope.loopback_scope = 1; 3811 stcb->asoc.scope.local_scope = 0; 3812 stcb->asoc.scope.ipv4_local_scope = 1; 3813 stcb->asoc.scope.site_scope = 1; 3814 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3815 /* 3816 * If the new destination is a 3817 * LINK_LOCAL we must have common 3818 * site scope. Don't set the local 3819 * scope since we may not share all 3820 * links, only loopback can do this. 3821 * Links on the local network would 3822 * also be on our private network 3823 * for v4 too. 3824 */ 3825 stcb->asoc.scope.ipv4_local_scope = 1; 3826 stcb->asoc.scope.site_scope = 1; 3827 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3828 /* 3829 * If the new destination is 3830 * SITE_LOCAL then we must have site 3831 * scope in common. 3832 */ 3833 stcb->asoc.scope.site_scope = 1; 3834 } 3835 } else { 3836 /* Validate the address is in scope */ 3837 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3838 (stcb->asoc.scope.loopback_scope == 0)) { 3839 addr_inscope = 0; 3840 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3841 (stcb->asoc.scope.local_scope == 0)) { 3842 addr_inscope = 0; 3843 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3844 (stcb->asoc.scope.site_scope == 0)) { 3845 addr_inscope = 0; 3846 } 3847 } 3848 break; 3849 } 3850 #endif 3851 default: 3852 /* not supported family type */ 3853 return (-1); 3854 } 3855 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3856 if (net == NULL) { 3857 return (-1); 3858 } 3859 SCTP_INCR_RADDR_COUNT(); 3860 memset(net, 0, sizeof(struct sctp_nets)); 3861 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3862 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3863 switch (newaddr->sa_family) { 3864 #ifdef INET 3865 case AF_INET: 3866 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3867 break; 3868 #endif 3869 #ifdef INET6 3870 case AF_INET6: 3871 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3872 break; 3873 #endif 3874 default: 3875 break; 3876 } 3877 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3878 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3879 stcb->asoc.scope.loopback_scope = 1; 3880 stcb->asoc.scope.ipv4_local_scope = 1; 3881 stcb->asoc.scope.local_scope = 0; 3882 stcb->asoc.scope.site_scope = 1; 3883 addr_inscope = 1; 3884 } 3885 net->failure_threshold = stcb->asoc.def_net_failure; 3886 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3887 if (addr_inscope == 0) { 3888 net->dest_state = (SCTP_ADDR_REACHABLE | 3889 SCTP_ADDR_OUT_OF_SCOPE); 3890 } else { 3891 if (from == SCTP_ADDR_IS_CONFIRMED) 3892 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3893 net->dest_state = SCTP_ADDR_REACHABLE; 3894 else 3895 net->dest_state = SCTP_ADDR_REACHABLE | 3896 SCTP_ADDR_UNCONFIRMED; 3897 } 3898 /* 3899 * We set this to 0, the timer code knows that this means its an 3900 * initial value 3901 */ 3902 net->rto_needed = 1; 3903 net->RTO = 0; 3904 net->RTO_measured = 0; 3905 stcb->asoc.numnets++; 3906 net->ref_count = 1; 3907 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3908 net->port = port; 3909 net->dscp = stcb->asoc.default_dscp; 3910 #ifdef INET6 3911 net->flowlabel = stcb->asoc.default_flowlabel; 3912 #endif 3913 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3914 net->dest_state |= SCTP_ADDR_NOHB; 3915 } else { 3916 net->dest_state &= ~SCTP_ADDR_NOHB; 3917 } 3918 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3919 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3920 } else { 3921 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3922 } 3923 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3924 /* Init the timer structure */ 3925 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3926 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3927 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3928 3929 /* Now generate a route for this guy */ 3930 #ifdef INET6 3931 /* KAME hack: embed scopeid */ 3932 if (newaddr->sa_family == AF_INET6) { 3933 struct sockaddr_in6 *sin6; 3934 3935 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3936 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3937 sin6->sin6_scope_id = 0; 3938 } 3939 #endif 3940 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3941 stcb->asoc.vrf_id, 3942 stcb->sctp_ep->fibnum); 3943 3944 net->src_addr_selected = 0; 3945 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3946 /* Get source address */ 3947 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3948 stcb, 3949 (sctp_route_t *)&net->ro, 3950 net, 3951 0, 3952 stcb->asoc.vrf_id); 3953 if (stcb->asoc.default_mtu > 0) { 3954 net->mtu = stcb->asoc.default_mtu; 3955 switch (net->ro._l_addr.sa.sa_family) { 3956 #ifdef INET 3957 case AF_INET: 3958 net->mtu += SCTP_MIN_V4_OVERHEAD; 3959 break; 3960 #endif 3961 #ifdef INET6 3962 case AF_INET6: 3963 net->mtu += SCTP_MIN_OVERHEAD; 3964 break; 3965 #endif 3966 default: 3967 break; 3968 } 3969 #if defined(INET) || defined(INET6) 3970 if (net->port) { 3971 net->mtu += (uint32_t)sizeof(struct udphdr); 3972 } 3973 #endif 3974 } else if (net->ro._s_addr != NULL) { 3975 uint32_t imtu, rmtu, hcmtu; 3976 3977 net->src_addr_selected = 1; 3978 /* Now get the interface MTU */ 3979 if (net->ro._s_addr->ifn_p != NULL) { 3980 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3981 } else { 3982 imtu = 0; 3983 } 3984 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3985 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3986 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3987 if (rmtu == 0) { 3988 /* 3989 * Start things off to match mtu of 3990 * interface please. 3991 */ 3992 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3993 net->ro.ro_rt, net->mtu); 3994 } 3995 } 3996 } 3997 if (net->mtu == 0) { 3998 if (stcb->asoc.default_mtu > 0) { 3999 net->mtu = stcb->asoc.default_mtu; 4000 switch (net->ro._l_addr.sa.sa_family) { 4001 #ifdef INET 4002 case AF_INET: 4003 net->mtu += SCTP_MIN_V4_OVERHEAD; 4004 break; 4005 #endif 4006 #ifdef INET6 4007 case AF_INET6: 4008 net->mtu += SCTP_MIN_OVERHEAD; 4009 break; 4010 #endif 4011 default: 4012 break; 4013 } 4014 #if defined(INET) || defined(INET6) 4015 if (net->port) { 4016 net->mtu += (uint32_t)sizeof(struct udphdr); 4017 } 4018 #endif 4019 } else { 4020 switch (newaddr->sa_family) { 4021 #ifdef INET 4022 case AF_INET: 4023 net->mtu = SCTP_DEFAULT_MTU; 4024 break; 4025 #endif 4026 #ifdef INET6 4027 case AF_INET6: 4028 net->mtu = 1280; 4029 break; 4030 #endif 4031 default: 4032 break; 4033 } 4034 } 4035 } 4036 #if defined(INET) || defined(INET6) 4037 if (net->port) { 4038 net->mtu -= (uint32_t)sizeof(struct udphdr); 4039 } 4040 #endif 4041 if (from == SCTP_ALLOC_ASOC) { 4042 stcb->asoc.smallest_mtu = net->mtu; 4043 } 4044 if (stcb->asoc.smallest_mtu > net->mtu) { 4045 sctp_pathmtu_adjustment(stcb, net->mtu); 4046 } 4047 #ifdef INET6 4048 if (newaddr->sa_family == AF_INET6) { 4049 struct sockaddr_in6 *sin6; 4050 4051 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4052 (void)sa6_recoverscope(sin6); 4053 } 4054 #endif 4055 4056 /* JRS - Use the congestion control given in the CC module */ 4057 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4058 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4059 4060 /* 4061 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4062 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4063 */ 4064 net->find_pseudo_cumack = 1; 4065 net->find_rtx_pseudo_cumack = 1; 4066 /* Choose an initial flowid. */ 4067 net->flowid = stcb->asoc.my_vtag ^ 4068 ntohs(stcb->rport) ^ 4069 ntohs(stcb->sctp_ep->sctp_lport); 4070 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4071 if (netp) { 4072 *netp = net; 4073 } 4074 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4075 if (net->ro.ro_rt == NULL) { 4076 /* Since we have no route put it at the back */ 4077 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4078 } else if (netfirst == NULL) { 4079 /* We are the first one in the pool. */ 4080 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4081 } else if (netfirst->ro.ro_rt == NULL) { 4082 /* 4083 * First one has NO route. Place this one ahead of the first 4084 * one. 4085 */ 4086 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4087 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4088 /* 4089 * This one has a different interface than the one at the 4090 * top of the list. Place it ahead. 4091 */ 4092 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4093 } else { 4094 /* 4095 * Ok we have the same interface as the first one. Move 4096 * forward until we find either a) one with a NULL route... 4097 * insert ahead of that b) one with a different ifp.. insert 4098 * after that. c) end of the list.. insert at the tail. 4099 */ 4100 struct sctp_nets *netlook; 4101 4102 do { 4103 netlook = TAILQ_NEXT(netfirst, sctp_next); 4104 if (netlook == NULL) { 4105 /* End of the list */ 4106 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4107 break; 4108 } else if (netlook->ro.ro_rt == NULL) { 4109 /* next one has NO route */ 4110 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4111 break; 4112 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4113 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4114 net, sctp_next); 4115 break; 4116 } 4117 /* Shift forward */ 4118 netfirst = netlook; 4119 } while (netlook != NULL); 4120 } 4121 4122 /* got to have a primary set */ 4123 if (stcb->asoc.primary_destination == 0) { 4124 stcb->asoc.primary_destination = net; 4125 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4126 (net->ro.ro_rt) && 4127 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4128 /* No route to current primary adopt new primary */ 4129 stcb->asoc.primary_destination = net; 4130 } 4131 /* Validate primary is first */ 4132 net = TAILQ_FIRST(&stcb->asoc.nets); 4133 if ((net != stcb->asoc.primary_destination) && 4134 (stcb->asoc.primary_destination)) { 4135 /* 4136 * first one on the list is NOT the primary sctp_cmpaddr() 4137 * is much more efficient if the primary is the first on the 4138 * list, make it so. 4139 */ 4140 TAILQ_REMOVE(&stcb->asoc.nets, 4141 stcb->asoc.primary_destination, sctp_next); 4142 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4143 stcb->asoc.primary_destination, sctp_next); 4144 } 4145 return (0); 4146 } 4147 4148 4149 static uint32_t 4150 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4151 { 4152 uint32_t id; 4153 struct sctpasochead *head; 4154 struct sctp_tcb *lstcb; 4155 4156 try_again: 4157 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4158 /* TSNH */ 4159 return (0); 4160 } 4161 /* 4162 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4163 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4164 */ 4165 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4166 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4167 } 4168 id = inp->sctp_associd_counter; 4169 inp->sctp_associd_counter++; 4170 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4171 if (lstcb) { 4172 goto try_again; 4173 } 4174 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4175 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4176 stcb->asoc.in_asocid_hash = 1; 4177 return (id); 4178 } 4179 4180 /* 4181 * allocate an association and add it to the endpoint. The caller must be 4182 * careful to add all additional addresses once they are know right away or 4183 * else the assoc will be may experience a blackout scenario. 4184 */ 4185 struct sctp_tcb * 4186 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4187 int *error, uint32_t override_tag, uint32_t vrf_id, 4188 uint16_t o_streams, uint16_t port, 4189 struct thread *p, 4190 int initialize_auth_params) 4191 { 4192 /* note the p argument is only valid in unbound sockets */ 4193 4194 struct sctp_tcb *stcb; 4195 struct sctp_association *asoc; 4196 struct sctpasochead *head; 4197 uint16_t rport; 4198 int err; 4199 4200 /* 4201 * Assumption made here: Caller has done a 4202 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4203 * address does not exist already. 4204 */ 4205 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4206 /* Hit max assoc, sorry no more */ 4207 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4208 *error = ENOBUFS; 4209 return (NULL); 4210 } 4211 if (firstaddr == NULL) { 4212 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4213 *error = EINVAL; 4214 return (NULL); 4215 } 4216 SCTP_INP_RLOCK(inp); 4217 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4218 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4219 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4220 /* 4221 * If its in the TCP pool, its NOT allowed to create an 4222 * association. The parent listener needs to call 4223 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4224 * off, or connected one does this.. its an error. 4225 */ 4226 SCTP_INP_RUNLOCK(inp); 4227 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4228 *error = EINVAL; 4229 return (NULL); 4230 } 4231 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4232 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4233 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4234 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4235 SCTP_INP_RUNLOCK(inp); 4236 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4237 *error = EINVAL; 4238 return (NULL); 4239 } 4240 } 4241 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4242 #ifdef SCTP_DEBUG 4243 if (firstaddr) { 4244 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4245 switch (firstaddr->sa_family) { 4246 #ifdef INET 4247 case AF_INET: 4248 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4249 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4250 break; 4251 #endif 4252 #ifdef INET6 4253 case AF_INET6: 4254 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4255 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4256 break; 4257 #endif 4258 default: 4259 break; 4260 } 4261 } else { 4262 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4263 } 4264 #endif /* SCTP_DEBUG */ 4265 switch (firstaddr->sa_family) { 4266 #ifdef INET 4267 case AF_INET: 4268 { 4269 struct sockaddr_in *sin; 4270 4271 sin = (struct sockaddr_in *)firstaddr; 4272 if ((ntohs(sin->sin_port) == 0) || 4273 (sin->sin_addr.s_addr == INADDR_ANY) || 4274 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4275 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4276 /* Invalid address */ 4277 SCTP_INP_RUNLOCK(inp); 4278 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4279 *error = EINVAL; 4280 return (NULL); 4281 } 4282 rport = sin->sin_port; 4283 break; 4284 } 4285 #endif 4286 #ifdef INET6 4287 case AF_INET6: 4288 { 4289 struct sockaddr_in6 *sin6; 4290 4291 sin6 = (struct sockaddr_in6 *)firstaddr; 4292 if ((ntohs(sin6->sin6_port) == 0) || 4293 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4294 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4295 /* Invalid address */ 4296 SCTP_INP_RUNLOCK(inp); 4297 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4298 *error = EINVAL; 4299 return (NULL); 4300 } 4301 rport = sin6->sin6_port; 4302 break; 4303 } 4304 #endif 4305 default: 4306 /* not supported family type */ 4307 SCTP_INP_RUNLOCK(inp); 4308 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4309 *error = EINVAL; 4310 return (NULL); 4311 } 4312 SCTP_INP_RUNLOCK(inp); 4313 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4314 /* 4315 * If you have not performed a bind, then we need to do the 4316 * ephemeral bind for you. 4317 */ 4318 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4319 (struct sockaddr *)NULL, 4320 (struct sctp_ifa *)NULL, 4321 p 4322 ))) { 4323 /* bind error, probably perm */ 4324 *error = err; 4325 return (NULL); 4326 } 4327 } 4328 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4329 if (stcb == NULL) { 4330 /* out of memory? */ 4331 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4332 *error = ENOMEM; 4333 return (NULL); 4334 } 4335 SCTP_INCR_ASOC_COUNT(); 4336 4337 memset(stcb, 0, sizeof(*stcb)); 4338 asoc = &stcb->asoc; 4339 4340 SCTP_TCB_LOCK_INIT(stcb); 4341 SCTP_TCB_SEND_LOCK_INIT(stcb); 4342 stcb->rport = rport; 4343 /* setup back pointer's */ 4344 stcb->sctp_ep = inp; 4345 stcb->sctp_socket = inp->sctp_socket; 4346 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4347 /* failed */ 4348 SCTP_TCB_LOCK_DESTROY(stcb); 4349 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4350 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4351 SCTP_DECR_ASOC_COUNT(); 4352 *error = err; 4353 return (NULL); 4354 } 4355 /* and the port */ 4356 SCTP_INP_INFO_WLOCK(); 4357 SCTP_INP_WLOCK(inp); 4358 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4359 /* inpcb freed while alloc going on */ 4360 SCTP_TCB_LOCK_DESTROY(stcb); 4361 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4362 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4363 SCTP_INP_WUNLOCK(inp); 4364 SCTP_INP_INFO_WUNLOCK(); 4365 SCTP_DECR_ASOC_COUNT(); 4366 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4367 *error = EINVAL; 4368 return (NULL); 4369 } 4370 SCTP_TCB_LOCK(stcb); 4371 4372 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4373 /* now that my_vtag is set, add it to the hash */ 4374 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4375 /* put it in the bucket in the vtag hash of assoc's for the system */ 4376 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4377 SCTP_INP_INFO_WUNLOCK(); 4378 4379 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4380 /* failure.. memory error? */ 4381 if (asoc->strmout) { 4382 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4383 asoc->strmout = NULL; 4384 } 4385 if (asoc->mapping_array) { 4386 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4387 asoc->mapping_array = NULL; 4388 } 4389 if (asoc->nr_mapping_array) { 4390 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4391 asoc->nr_mapping_array = NULL; 4392 } 4393 SCTP_DECR_ASOC_COUNT(); 4394 SCTP_TCB_UNLOCK(stcb); 4395 SCTP_TCB_LOCK_DESTROY(stcb); 4396 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4397 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4398 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4399 SCTP_INP_WUNLOCK(inp); 4400 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4401 *error = ENOBUFS; 4402 return (NULL); 4403 } 4404 /* Init all the timers */ 4405 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4406 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4407 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4408 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4409 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4410 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4411 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4412 4413 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4414 /* now file the port under the hash as well */ 4415 if (inp->sctp_tcbhash != NULL) { 4416 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4417 inp->sctp_hashmark)]; 4418 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4419 } 4420 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4421 sctp_initialize_auth_params(inp, stcb); 4422 } 4423 SCTP_INP_WUNLOCK(inp); 4424 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4425 return (stcb); 4426 } 4427 4428 4429 void 4430 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4431 { 4432 struct sctp_association *asoc; 4433 4434 asoc = &stcb->asoc; 4435 asoc->numnets--; 4436 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4437 if (net == asoc->primary_destination) { 4438 /* Reset primary */ 4439 struct sctp_nets *lnet; 4440 4441 lnet = TAILQ_FIRST(&asoc->nets); 4442 /* 4443 * Mobility adaptation Ideally, if deleted destination is 4444 * the primary, it becomes a fast retransmission trigger by 4445 * the subsequent SET PRIMARY. (by micchie) 4446 */ 4447 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4448 SCTP_MOBILITY_BASE) || 4449 sctp_is_mobility_feature_on(stcb->sctp_ep, 4450 SCTP_MOBILITY_FASTHANDOFF)) { 4451 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4452 if (asoc->deleted_primary != NULL) { 4453 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4454 goto out; 4455 } 4456 asoc->deleted_primary = net; 4457 atomic_add_int(&net->ref_count, 1); 4458 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4459 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4460 sctp_mobility_feature_on(stcb->sctp_ep, 4461 SCTP_MOBILITY_PRIM_DELETED); 4462 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4463 stcb->sctp_ep, stcb, NULL); 4464 } 4465 out: 4466 /* Try to find a confirmed primary */ 4467 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4468 } 4469 if (net == asoc->last_data_chunk_from) { 4470 /* Reset primary */ 4471 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4472 } 4473 if (net == asoc->last_control_chunk_from) { 4474 /* Clear net */ 4475 asoc->last_control_chunk_from = NULL; 4476 } 4477 if (net == stcb->asoc.alternate) { 4478 sctp_free_remote_addr(stcb->asoc.alternate); 4479 stcb->asoc.alternate = NULL; 4480 } 4481 sctp_free_remote_addr(net); 4482 } 4483 4484 /* 4485 * remove a remote endpoint address from an association, it will fail if the 4486 * address does not exist. 4487 */ 4488 int 4489 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4490 { 4491 /* 4492 * Here we need to remove a remote address. This is quite simple, we 4493 * first find it in the list of address for the association 4494 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4495 * on that item. Note we do not allow it to be removed if there are 4496 * no other addresses. 4497 */ 4498 struct sctp_association *asoc; 4499 struct sctp_nets *net, *nnet; 4500 4501 asoc = &stcb->asoc; 4502 4503 /* locate the address */ 4504 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4505 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4506 continue; 4507 } 4508 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4509 remaddr)) { 4510 /* we found the guy */ 4511 if (asoc->numnets < 2) { 4512 /* Must have at LEAST two remote addresses */ 4513 return (-1); 4514 } else { 4515 sctp_remove_net(stcb, net); 4516 return (0); 4517 } 4518 } 4519 } 4520 /* not found. */ 4521 return (-2); 4522 } 4523 4524 void 4525 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4526 { 4527 struct sctpvtaghead *chain; 4528 struct sctp_tagblock *twait_block; 4529 int found = 0; 4530 int i; 4531 4532 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4533 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4534 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4535 if ((twait_block->vtag_block[i].v_tag == tag) && 4536 (twait_block->vtag_block[i].lport == lport) && 4537 (twait_block->vtag_block[i].rport == rport)) { 4538 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4539 twait_block->vtag_block[i].v_tag = 0; 4540 twait_block->vtag_block[i].lport = 0; 4541 twait_block->vtag_block[i].rport = 0; 4542 found = 1; 4543 break; 4544 } 4545 } 4546 if (found) 4547 break; 4548 } 4549 } 4550 4551 int 4552 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4553 { 4554 struct sctpvtaghead *chain; 4555 struct sctp_tagblock *twait_block; 4556 int found = 0; 4557 int i; 4558 4559 SCTP_INP_INFO_WLOCK(); 4560 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4561 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4562 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4563 if ((twait_block->vtag_block[i].v_tag == tag) && 4564 (twait_block->vtag_block[i].lport == lport) && 4565 (twait_block->vtag_block[i].rport == rport)) { 4566 found = 1; 4567 break; 4568 } 4569 } 4570 if (found) 4571 break; 4572 } 4573 SCTP_INP_INFO_WUNLOCK(); 4574 return (found); 4575 } 4576 4577 4578 void 4579 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4580 { 4581 struct sctpvtaghead *chain; 4582 struct sctp_tagblock *twait_block; 4583 struct timeval now; 4584 int set, i; 4585 4586 if (time == 0) { 4587 /* Its disabled */ 4588 return; 4589 } 4590 (void)SCTP_GETTIME_TIMEVAL(&now); 4591 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4592 set = 0; 4593 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4594 /* Block(s) present, lets find space, and expire on the fly */ 4595 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4596 if ((twait_block->vtag_block[i].v_tag == 0) && 4597 !set) { 4598 twait_block->vtag_block[i].tv_sec_at_expire = 4599 now.tv_sec + time; 4600 twait_block->vtag_block[i].v_tag = tag; 4601 twait_block->vtag_block[i].lport = lport; 4602 twait_block->vtag_block[i].rport = rport; 4603 set = 1; 4604 } else if ((twait_block->vtag_block[i].v_tag) && 4605 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4606 /* Audit expires this guy */ 4607 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4608 twait_block->vtag_block[i].v_tag = 0; 4609 twait_block->vtag_block[i].lport = 0; 4610 twait_block->vtag_block[i].rport = 0; 4611 if (set == 0) { 4612 /* Reuse it for my new tag */ 4613 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4614 twait_block->vtag_block[i].v_tag = tag; 4615 twait_block->vtag_block[i].lport = lport; 4616 twait_block->vtag_block[i].rport = rport; 4617 set = 1; 4618 } 4619 } 4620 } 4621 if (set) { 4622 /* 4623 * We only do up to the block where we can place our 4624 * tag for audits 4625 */ 4626 break; 4627 } 4628 } 4629 /* Need to add a new block to chain */ 4630 if (!set) { 4631 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4632 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4633 if (twait_block == NULL) { 4634 #ifdef INVARIANTS 4635 panic("Can not alloc tagblock"); 4636 #endif 4637 return; 4638 } 4639 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4640 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4641 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4642 twait_block->vtag_block[0].v_tag = tag; 4643 twait_block->vtag_block[0].lport = lport; 4644 twait_block->vtag_block[0].rport = rport; 4645 } 4646 } 4647 4648 void 4649 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4650 { 4651 struct sctp_tmit_chunk *chk, *nchk; 4652 struct sctp_queued_to_read *control, *ncontrol; 4653 4654 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4655 TAILQ_REMOVE(rh, control, next_instrm); 4656 control->on_strm_q = 0; 4657 if (control->on_read_q == 0) { 4658 sctp_free_remote_addr(control->whoFrom); 4659 if (control->data) { 4660 sctp_m_freem(control->data); 4661 control->data = NULL; 4662 } 4663 } 4664 /* Reassembly free? */ 4665 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4666 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4667 if (chk->data) { 4668 sctp_m_freem(chk->data); 4669 chk->data = NULL; 4670 } 4671 if (chk->holds_key_ref) 4672 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4673 sctp_free_remote_addr(chk->whoTo); 4674 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4675 SCTP_DECR_CHK_COUNT(); 4676 /* sa_ignore FREED_MEMORY */ 4677 } 4678 /* 4679 * We don't free the address here since all the net's were 4680 * freed above. 4681 */ 4682 if (control->on_read_q == 0) { 4683 sctp_free_a_readq(stcb, control); 4684 } 4685 } 4686 } 4687 4688 4689 /*- 4690 * Free the association after un-hashing the remote port. This 4691 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4692 * expect that the input to this function IS a locked TCB. 4693 * It will return 0, if it did NOT destroy the association (instead 4694 * it unlocks it. It will return NON-zero if it either destroyed the 4695 * association OR the association is already destroyed. 4696 */ 4697 int 4698 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4699 { 4700 int i; 4701 struct sctp_association *asoc; 4702 struct sctp_nets *net, *nnet; 4703 struct sctp_laddr *laddr, *naddr; 4704 struct sctp_tmit_chunk *chk, *nchk; 4705 struct sctp_asconf_addr *aparam, *naparam; 4706 struct sctp_asconf_ack *aack, *naack; 4707 struct sctp_stream_reset_list *strrst, *nstrrst; 4708 struct sctp_queued_to_read *sq, *nsq; 4709 struct sctp_stream_queue_pending *sp, *nsp; 4710 sctp_sharedkey_t *shared_key, *nshared_key; 4711 struct socket *so; 4712 4713 /* first, lets purge the entry from the hash table. */ 4714 4715 #ifdef SCTP_LOG_CLOSING 4716 sctp_log_closing(inp, stcb, 6); 4717 #endif 4718 if (stcb->asoc.state == 0) { 4719 #ifdef SCTP_LOG_CLOSING 4720 sctp_log_closing(inp, NULL, 7); 4721 #endif 4722 /* there is no asoc, really TSNH :-0 */ 4723 return (1); 4724 } 4725 if (stcb->asoc.alternate) { 4726 sctp_free_remote_addr(stcb->asoc.alternate); 4727 stcb->asoc.alternate = NULL; 4728 } 4729 /* TEMP CODE */ 4730 if (stcb->freed_from_where == 0) { 4731 /* Only record the first place free happened from */ 4732 stcb->freed_from_where = from_location; 4733 } 4734 /* TEMP CODE */ 4735 4736 asoc = &stcb->asoc; 4737 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4738 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4739 /* nothing around */ 4740 so = NULL; 4741 else 4742 so = inp->sctp_socket; 4743 4744 /* 4745 * We used timer based freeing if a reader or writer is in the way. 4746 * So we first check if we are actually being called from a timer, 4747 * if so we abort early if a reader or writer is still in the way. 4748 */ 4749 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4750 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4751 /* 4752 * is it the timer driving us? if so are the reader/writers 4753 * gone? 4754 */ 4755 if (stcb->asoc.refcnt) { 4756 /* nope, reader or writer in the way */ 4757 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4758 /* no asoc destroyed */ 4759 SCTP_TCB_UNLOCK(stcb); 4760 #ifdef SCTP_LOG_CLOSING 4761 sctp_log_closing(inp, stcb, 8); 4762 #endif 4763 return (0); 4764 } 4765 } 4766 /* now clean up any other timers */ 4767 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4768 asoc->dack_timer.self = NULL; 4769 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4770 /*- 4771 * For stream reset we don't blast this unless 4772 * it is a str-reset timer, it might be the 4773 * free-asoc timer which we DON'T want to 4774 * disturb. 4775 */ 4776 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4777 asoc->strreset_timer.self = NULL; 4778 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4779 asoc->asconf_timer.self = NULL; 4780 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4781 asoc->autoclose_timer.self = NULL; 4782 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4783 asoc->shut_guard_timer.self = NULL; 4784 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4785 asoc->delayed_event_timer.self = NULL; 4786 /* Mobility adaptation */ 4787 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4788 asoc->delete_prim_timer.self = NULL; 4789 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4790 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4791 net->rxt_timer.self = NULL; 4792 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4793 net->pmtu_timer.self = NULL; 4794 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4795 net->hb_timer.self = NULL; 4796 } 4797 /* Now the read queue needs to be cleaned up (only once) */ 4798 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4799 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4800 SCTP_INP_READ_LOCK(inp); 4801 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4802 if (sq->stcb == stcb) { 4803 sq->do_not_ref_stcb = 1; 4804 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4805 /* 4806 * If there is no end, there never will be 4807 * now. 4808 */ 4809 if (sq->end_added == 0) { 4810 /* Held for PD-API clear that. */ 4811 sq->pdapi_aborted = 1; 4812 sq->held_length = 0; 4813 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4814 /* 4815 * Need to add a PD-API 4816 * aborted indication. 4817 * Setting the control_pdapi 4818 * assures that it will be 4819 * added right after this 4820 * msg. 4821 */ 4822 uint32_t strseq; 4823 4824 stcb->asoc.control_pdapi = sq; 4825 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4826 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4827 stcb, 4828 SCTP_PARTIAL_DELIVERY_ABORTED, 4829 (void *)&strseq, 4830 SCTP_SO_LOCKED); 4831 stcb->asoc.control_pdapi = NULL; 4832 } 4833 } 4834 /* Add an end to wake them */ 4835 sq->end_added = 1; 4836 } 4837 } 4838 SCTP_INP_READ_UNLOCK(inp); 4839 if (stcb->block_entry) { 4840 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4841 stcb->block_entry->error = ECONNRESET; 4842 stcb->block_entry = NULL; 4843 } 4844 } 4845 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4846 /* 4847 * Someone holds a reference OR the socket is unaccepted 4848 * yet. 4849 */ 4850 if ((stcb->asoc.refcnt) || 4851 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4852 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4853 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4854 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4855 } 4856 SCTP_TCB_UNLOCK(stcb); 4857 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4858 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4859 /* nothing around */ 4860 so = NULL; 4861 if (so) { 4862 /* Wake any reader/writers */ 4863 sctp_sorwakeup(inp, so); 4864 sctp_sowwakeup(inp, so); 4865 } 4866 4867 #ifdef SCTP_LOG_CLOSING 4868 sctp_log_closing(inp, stcb, 9); 4869 #endif 4870 /* no asoc destroyed */ 4871 return (0); 4872 } 4873 #ifdef SCTP_LOG_CLOSING 4874 sctp_log_closing(inp, stcb, 10); 4875 #endif 4876 /* 4877 * When I reach here, no others want to kill the assoc yet.. and I 4878 * own the lock. Now its possible an abort comes in when I do the 4879 * lock exchange below to grab all the locks to do the final take 4880 * out. to prevent this we increment the count, which will start a 4881 * timer and blow out above thus assuring us that we hold exclusive 4882 * killing of the asoc. Note that after getting back the TCB lock we 4883 * will go ahead and increment the counter back up and stop any 4884 * timer a passing stranger may have started :-S 4885 */ 4886 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4887 atomic_add_int(&stcb->asoc.refcnt, 1); 4888 4889 SCTP_TCB_UNLOCK(stcb); 4890 SCTP_INP_INFO_WLOCK(); 4891 SCTP_INP_WLOCK(inp); 4892 SCTP_TCB_LOCK(stcb); 4893 } 4894 /* Double check the GONE flag */ 4895 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4896 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4897 /* nothing around */ 4898 so = NULL; 4899 4900 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4901 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4902 /* 4903 * For TCP type we need special handling when we are 4904 * connected. We also include the peel'ed off ones to. 4905 */ 4906 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4907 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4908 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4909 if (so) { 4910 SOCKBUF_LOCK(&so->so_rcv); 4911 so->so_state &= ~(SS_ISCONNECTING | 4912 SS_ISDISCONNECTING | 4913 SS_ISCONFIRMING | 4914 SS_ISCONNECTED); 4915 so->so_state |= SS_ISDISCONNECTED; 4916 socantrcvmore_locked(so); 4917 socantsendmore(so); 4918 sctp_sowwakeup(inp, so); 4919 sctp_sorwakeup(inp, so); 4920 SCTP_SOWAKEUP(so); 4921 } 4922 } 4923 } 4924 4925 /* 4926 * Make it invalid too, that way if its about to run it will abort 4927 * and return. 4928 */ 4929 /* re-increment the lock */ 4930 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4931 atomic_add_int(&stcb->asoc.refcnt, -1); 4932 } 4933 if (stcb->asoc.refcnt) { 4934 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4935 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4936 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4937 SCTP_INP_INFO_WUNLOCK(); 4938 SCTP_INP_WUNLOCK(inp); 4939 } 4940 SCTP_TCB_UNLOCK(stcb); 4941 return (0); 4942 } 4943 asoc->state = 0; 4944 if (inp->sctp_tcbhash) { 4945 LIST_REMOVE(stcb, sctp_tcbhash); 4946 } 4947 if (stcb->asoc.in_asocid_hash) { 4948 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4949 } 4950 /* Now lets remove it from the list of ALL associations in the EP */ 4951 LIST_REMOVE(stcb, sctp_tcblist); 4952 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4953 SCTP_INP_INCR_REF(inp); 4954 SCTP_INP_WUNLOCK(inp); 4955 } 4956 /* pull from vtag hash */ 4957 LIST_REMOVE(stcb, sctp_asocs); 4958 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4959 inp->sctp_lport, stcb->rport); 4960 4961 /* 4962 * Now restop the timers to be sure this is paranoia at is finest! 4963 */ 4964 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4965 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4966 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4967 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4968 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4969 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4970 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4971 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4972 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4973 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4974 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4975 } 4976 4977 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4978 /* 4979 * The chunk lists and such SHOULD be empty but we check them just 4980 * in case. 4981 */ 4982 /* anything on the wheel needs to be removed */ 4983 SCTP_TCB_SEND_LOCK(stcb); 4984 for (i = 0; i < asoc->streamoutcnt; i++) { 4985 struct sctp_stream_out *outs; 4986 4987 outs = &asoc->strmout[i]; 4988 /* now clean up any chunks here */ 4989 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4990 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4991 TAILQ_REMOVE(&outs->outqueue, sp, next); 4992 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1); 4993 sctp_free_spbufspace(stcb, asoc, sp); 4994 if (sp->data) { 4995 if (so) { 4996 /* Still an open socket - report */ 4997 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4998 0, (void *)sp, SCTP_SO_LOCKED); 4999 } 5000 if (sp->data) { 5001 sctp_m_freem(sp->data); 5002 sp->data = NULL; 5003 sp->tail_mbuf = NULL; 5004 sp->length = 0; 5005 } 5006 } 5007 if (sp->net) { 5008 sctp_free_remote_addr(sp->net); 5009 sp->net = NULL; 5010 } 5011 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 5012 } 5013 } 5014 SCTP_TCB_SEND_UNLOCK(stcb); 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(void) 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 < sizeof(struct sctp_paramhdr)) { 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 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6432 return (-101); 6433 } 6434 phdr = sctp_get_next_param(m, offset, 6435 (struct sctp_paramhdr *)&lstore, 6436 plen); 6437 if (phdr == NULL) { 6438 return (-24); 6439 } 6440 fee = (struct sctp_asconf_addr_param *)phdr; 6441 lptype = ntohs(fee->addrp.ph.param_type); 6442 switch (lptype) { 6443 #ifdef INET 6444 case SCTP_IPV4_ADDRESS: 6445 if (plen != 6446 sizeof(struct sctp_asconf_addrv4_param)) { 6447 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6448 (int)sizeof(struct sctp_asconf_addrv4_param), 6449 plen); 6450 } else { 6451 fii = (struct sctp_asconf_addrv4_param *)fee; 6452 sin.sin_addr.s_addr = fii->addrp.addr; 6453 lsa = (struct sockaddr *)&sin; 6454 } 6455 break; 6456 #endif 6457 #ifdef INET6 6458 case SCTP_IPV6_ADDRESS: 6459 if (plen != 6460 sizeof(struct sctp_asconf_addr_param)) { 6461 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6462 (int)sizeof(struct sctp_asconf_addr_param), 6463 plen); 6464 } else { 6465 memcpy(sin6.sin6_addr.s6_addr, 6466 fee->addrp.addr, 6467 sizeof(fee->addrp.addr)); 6468 lsa = (struct sockaddr *)&sin6; 6469 } 6470 break; 6471 #endif 6472 default: 6473 break; 6474 } 6475 if (lsa) { 6476 (void)sctp_set_primary_addr(stcb, sa, NULL); 6477 } 6478 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6479 stcb->asoc.peer_supports_nat = 1; 6480 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6481 /* Peer supports pr-sctp */ 6482 peer_supports_prsctp = 1; 6483 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6484 /* A supported extension chunk */ 6485 struct sctp_supported_chunk_types_param *pr_supported; 6486 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6487 int num_ent, i; 6488 6489 if (plen > sizeof(local_store)) { 6490 return (-35); 6491 } 6492 phdr = sctp_get_next_param(m, offset, 6493 (struct sctp_paramhdr *)&local_store, plen); 6494 if (phdr == NULL) { 6495 return (-25); 6496 } 6497 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6498 num_ent = plen - sizeof(struct sctp_paramhdr); 6499 for (i = 0; i < num_ent; i++) { 6500 switch (pr_supported->chunk_types[i]) { 6501 case SCTP_ASCONF: 6502 peer_supports_asconf = 1; 6503 break; 6504 case SCTP_ASCONF_ACK: 6505 peer_supports_asconf_ack = 1; 6506 break; 6507 case SCTP_FORWARD_CUM_TSN: 6508 peer_supports_prsctp = 1; 6509 break; 6510 case SCTP_PACKET_DROPPED: 6511 peer_supports_pktdrop = 1; 6512 break; 6513 case SCTP_NR_SELECTIVE_ACK: 6514 peer_supports_nrsack = 1; 6515 break; 6516 case SCTP_STREAM_RESET: 6517 peer_supports_reconfig = 1; 6518 break; 6519 case SCTP_AUTHENTICATION: 6520 peer_supports_auth = 1; 6521 break; 6522 case SCTP_IDATA: 6523 peer_supports_idata = 1; 6524 break; 6525 default: 6526 /* one I have not learned yet */ 6527 break; 6528 6529 } 6530 } 6531 } else if (ptype == SCTP_RANDOM) { 6532 if (plen > sizeof(random_store)) 6533 break; 6534 if (got_random) { 6535 /* already processed a RANDOM */ 6536 goto next_param; 6537 } 6538 phdr = sctp_get_next_param(m, offset, 6539 (struct sctp_paramhdr *)random_store, 6540 plen); 6541 if (phdr == NULL) 6542 return (-26); 6543 p_random = (struct sctp_auth_random *)phdr; 6544 random_len = plen - sizeof(*p_random); 6545 /* enforce the random length */ 6546 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6547 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6548 return (-27); 6549 } 6550 got_random = 1; 6551 } else if (ptype == SCTP_HMAC_LIST) { 6552 uint16_t num_hmacs; 6553 uint16_t i; 6554 6555 if (plen > sizeof(hmacs_store)) 6556 break; 6557 if (got_hmacs) { 6558 /* already processed a HMAC list */ 6559 goto next_param; 6560 } 6561 phdr = sctp_get_next_param(m, offset, 6562 (struct sctp_paramhdr *)hmacs_store, 6563 plen); 6564 if (phdr == NULL) 6565 return (-28); 6566 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6567 hmacs_len = plen - sizeof(*hmacs); 6568 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6569 /* validate the hmac list */ 6570 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6571 return (-29); 6572 } 6573 if (stcb->asoc.peer_hmacs != NULL) 6574 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6575 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6576 if (stcb->asoc.peer_hmacs != NULL) { 6577 for (i = 0; i < num_hmacs; i++) { 6578 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6579 ntohs(hmacs->hmac_ids[i])); 6580 } 6581 } 6582 got_hmacs = 1; 6583 } else if (ptype == SCTP_CHUNK_LIST) { 6584 int i; 6585 6586 if (plen > sizeof(chunks_store)) 6587 break; 6588 if (got_chklist) { 6589 /* already processed a Chunks list */ 6590 goto next_param; 6591 } 6592 phdr = sctp_get_next_param(m, offset, 6593 (struct sctp_paramhdr *)chunks_store, 6594 plen); 6595 if (phdr == NULL) 6596 return (-30); 6597 chunks = (struct sctp_auth_chunk_list *)phdr; 6598 num_chunks = plen - sizeof(*chunks); 6599 if (stcb->asoc.peer_auth_chunks != NULL) 6600 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6601 else 6602 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6603 for (i = 0; i < num_chunks; i++) { 6604 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6605 stcb->asoc.peer_auth_chunks); 6606 /* record asconf/asconf-ack if listed */ 6607 if (chunks->chunk_types[i] == SCTP_ASCONF) 6608 saw_asconf = 1; 6609 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6610 saw_asconf_ack = 1; 6611 6612 } 6613 got_chklist = 1; 6614 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6615 (ptype == SCTP_STATE_COOKIE) || 6616 (ptype == SCTP_UNRECOG_PARAM) || 6617 (ptype == SCTP_COOKIE_PRESERVE) || 6618 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6619 (ptype == SCTP_ADD_IP_ADDRESS) || 6620 (ptype == SCTP_DEL_IP_ADDRESS) || 6621 (ptype == SCTP_ERROR_CAUSE_IND) || 6622 (ptype == SCTP_SUCCESS_REPORT)) { 6623 /* don't care */ ; 6624 } else { 6625 if ((ptype & 0x8000) == 0x0000) { 6626 /* 6627 * must stop processing the rest of the 6628 * param's. Any report bits were handled 6629 * with the call to 6630 * sctp_arethere_unrecognized_parameters() 6631 * when the INIT or INIT-ACK was first seen. 6632 */ 6633 break; 6634 } 6635 } 6636 6637 next_param: 6638 offset += SCTP_SIZE32(plen); 6639 if (offset >= limit) { 6640 break; 6641 } 6642 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6643 sizeof(param_buf)); 6644 } 6645 /* Now check to see if we need to purge any addresses */ 6646 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6647 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6648 SCTP_ADDR_NOT_IN_ASSOC) { 6649 /* This address has been removed from the asoc */ 6650 /* remove and free it */ 6651 stcb->asoc.numnets--; 6652 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6653 sctp_free_remote_addr(net); 6654 if (net == stcb->asoc.primary_destination) { 6655 stcb->asoc.primary_destination = NULL; 6656 sctp_select_primary_destination(stcb); 6657 } 6658 } 6659 } 6660 if ((stcb->asoc.ecn_supported == 1) && 6661 (peer_supports_ecn == 0)) { 6662 stcb->asoc.ecn_supported = 0; 6663 } 6664 if ((stcb->asoc.prsctp_supported == 1) && 6665 (peer_supports_prsctp == 0)) { 6666 stcb->asoc.prsctp_supported = 0; 6667 } 6668 if ((stcb->asoc.auth_supported == 1) && 6669 ((peer_supports_auth == 0) || 6670 (got_random == 0) || (got_hmacs == 0))) { 6671 stcb->asoc.auth_supported = 0; 6672 } 6673 if ((stcb->asoc.asconf_supported == 1) && 6674 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6675 (stcb->asoc.auth_supported == 0) || 6676 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6677 stcb->asoc.asconf_supported = 0; 6678 } 6679 if ((stcb->asoc.reconfig_supported == 1) && 6680 (peer_supports_reconfig == 0)) { 6681 stcb->asoc.reconfig_supported = 0; 6682 } 6683 if ((stcb->asoc.idata_supported == 1) && 6684 (peer_supports_idata == 0)) { 6685 stcb->asoc.idata_supported = 0; 6686 } 6687 if ((stcb->asoc.nrsack_supported == 1) && 6688 (peer_supports_nrsack == 0)) { 6689 stcb->asoc.nrsack_supported = 0; 6690 } 6691 if ((stcb->asoc.pktdrop_supported == 1) && 6692 (peer_supports_pktdrop == 0)) { 6693 stcb->asoc.pktdrop_supported = 0; 6694 } 6695 /* validate authentication required parameters */ 6696 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6697 /* peer does not support auth but sent a chunks list? */ 6698 return (-31); 6699 } 6700 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6701 /* peer supports asconf but not auth? */ 6702 return (-32); 6703 } else if ((peer_supports_asconf == 1) && 6704 (peer_supports_auth == 1) && 6705 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6706 return (-33); 6707 } 6708 /* concatenate the full random key */ 6709 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6710 if (chunks != NULL) { 6711 keylen += sizeof(*chunks) + num_chunks; 6712 } 6713 new_key = sctp_alloc_key(keylen); 6714 if (new_key != NULL) { 6715 /* copy in the RANDOM */ 6716 if (p_random != NULL) { 6717 keylen = sizeof(*p_random) + random_len; 6718 memcpy(new_key->key, p_random, keylen); 6719 } else { 6720 keylen = 0; 6721 } 6722 /* append in the AUTH chunks */ 6723 if (chunks != NULL) { 6724 memcpy(new_key->key + keylen, chunks, 6725 sizeof(*chunks) + num_chunks); 6726 keylen += sizeof(*chunks) + num_chunks; 6727 } 6728 /* append in the HMACs */ 6729 if (hmacs != NULL) { 6730 memcpy(new_key->key + keylen, hmacs, 6731 sizeof(*hmacs) + hmacs_len); 6732 } 6733 } else { 6734 /* failed to get memory for the key */ 6735 return (-34); 6736 } 6737 if (stcb->asoc.authinfo.peer_random != NULL) 6738 sctp_free_key(stcb->asoc.authinfo.peer_random); 6739 stcb->asoc.authinfo.peer_random = new_key; 6740 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6741 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6742 6743 return (0); 6744 } 6745 6746 int 6747 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6748 struct sctp_nets *net) 6749 { 6750 /* make sure the requested primary address exists in the assoc */ 6751 if (net == NULL && sa) 6752 net = sctp_findnet(stcb, sa); 6753 6754 if (net == NULL) { 6755 /* didn't find the requested primary address! */ 6756 return (-1); 6757 } else { 6758 /* set the primary address */ 6759 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6760 /* Must be confirmed, so queue to set */ 6761 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6762 return (0); 6763 } 6764 stcb->asoc.primary_destination = net; 6765 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6766 sctp_free_remote_addr(stcb->asoc.alternate); 6767 stcb->asoc.alternate = NULL; 6768 } 6769 net = TAILQ_FIRST(&stcb->asoc.nets); 6770 if (net != stcb->asoc.primary_destination) { 6771 /* 6772 * first one on the list is NOT the primary 6773 * sctp_cmpaddr() is much more efficient if the 6774 * primary is the first on the list, make it so. 6775 */ 6776 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6777 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6778 } 6779 return (0); 6780 } 6781 } 6782 6783 int 6784 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6785 { 6786 /* 6787 * This function serves two purposes. It will see if a TAG can be 6788 * re-used and return 1 for yes it is ok and 0 for don't use that 6789 * tag. A secondary function it will do is purge out old tags that 6790 * can be removed. 6791 */ 6792 struct sctpvtaghead *chain; 6793 struct sctp_tagblock *twait_block; 6794 struct sctpasochead *head; 6795 struct sctp_tcb *stcb; 6796 int i; 6797 6798 SCTP_INP_INFO_RLOCK(); 6799 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6800 SCTP_BASE_INFO(hashasocmark))]; 6801 LIST_FOREACH(stcb, head, sctp_asocs) { 6802 /* 6803 * We choose not to lock anything here. TCB's can't be 6804 * removed since we have the read lock, so they can't be 6805 * freed on us, same thing for the INP. I may be wrong with 6806 * this assumption, but we will go with it for now :-) 6807 */ 6808 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6809 continue; 6810 } 6811 if (stcb->asoc.my_vtag == tag) { 6812 /* candidate */ 6813 if (stcb->rport != rport) { 6814 continue; 6815 } 6816 if (stcb->sctp_ep->sctp_lport != lport) { 6817 continue; 6818 } 6819 /* Its a used tag set */ 6820 SCTP_INP_INFO_RUNLOCK(); 6821 return (0); 6822 } 6823 } 6824 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6825 /* Now what about timed wait ? */ 6826 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6827 /* 6828 * Block(s) are present, lets see if we have this tag in the 6829 * list 6830 */ 6831 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6832 if (twait_block->vtag_block[i].v_tag == 0) { 6833 /* not used */ 6834 continue; 6835 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6836 now->tv_sec) { 6837 /* Audit expires this guy */ 6838 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6839 twait_block->vtag_block[i].v_tag = 0; 6840 twait_block->vtag_block[i].lport = 0; 6841 twait_block->vtag_block[i].rport = 0; 6842 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6843 (twait_block->vtag_block[i].lport == lport) && 6844 (twait_block->vtag_block[i].rport == rport)) { 6845 /* Bad tag, sorry :< */ 6846 SCTP_INP_INFO_RUNLOCK(); 6847 return (0); 6848 } 6849 } 6850 } 6851 SCTP_INP_INFO_RUNLOCK(); 6852 return (1); 6853 } 6854 6855 static void 6856 sctp_drain_mbufs(struct sctp_tcb *stcb) 6857 { 6858 /* 6859 * We must hunt this association for MBUF's past the cumack (i.e. 6860 * out of order data that we can renege on). 6861 */ 6862 struct sctp_association *asoc; 6863 struct sctp_tmit_chunk *chk, *nchk; 6864 uint32_t cumulative_tsn_p1; 6865 struct sctp_queued_to_read *control, *ncontrol; 6866 int cnt, strmat; 6867 uint32_t gap, i; 6868 int fnd = 0; 6869 6870 /* We look for anything larger than the cum-ack + 1 */ 6871 6872 asoc = &stcb->asoc; 6873 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6874 /* none we can reneg on. */ 6875 return; 6876 } 6877 SCTP_STAT_INCR(sctps_protocol_drains_done); 6878 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6879 cnt = 0; 6880 /* Ok that was fun, now we will drain all the inbound streams? */ 6881 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6882 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6883 #ifdef INVARIANTS 6884 if (control->on_strm_q != SCTP_ON_ORDERED) { 6885 panic("Huh control: %p on_q: %d -- not ordered?", 6886 control, control->on_strm_q); 6887 } 6888 #endif 6889 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6890 /* Yep it is above cum-ack */ 6891 cnt++; 6892 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6893 KASSERT(control->length > 0, ("control has zero length")); 6894 if (asoc->size_on_all_streams >= control->length) { 6895 asoc->size_on_all_streams -= control->length; 6896 } else { 6897 #ifdef INVARIANTS 6898 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6899 #else 6900 asoc->size_on_all_streams = 0; 6901 #endif 6902 } 6903 sctp_ucount_decr(asoc->cnt_on_all_streams); 6904 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6905 if (control->on_read_q) { 6906 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6907 control->on_read_q = 0; 6908 } 6909 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6910 control->on_strm_q = 0; 6911 if (control->data) { 6912 sctp_m_freem(control->data); 6913 control->data = NULL; 6914 } 6915 sctp_free_remote_addr(control->whoFrom); 6916 /* Now its reasm? */ 6917 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6918 cnt++; 6919 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6920 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6921 if (asoc->size_on_reasm_queue >= chk->send_size) { 6922 asoc->size_on_reasm_queue -= chk->send_size; 6923 } else { 6924 #ifdef INVARIANTS 6925 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6926 #else 6927 asoc->size_on_reasm_queue = 0; 6928 #endif 6929 } 6930 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6931 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6932 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6933 if (chk->data) { 6934 sctp_m_freem(chk->data); 6935 chk->data = NULL; 6936 } 6937 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6938 } 6939 sctp_free_a_readq(stcb, control); 6940 } 6941 } 6942 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6943 #ifdef INVARIANTS 6944 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6945 panic("Huh control: %p on_q: %d -- not unordered?", 6946 control, control->on_strm_q); 6947 } 6948 #endif 6949 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6950 /* Yep it is above cum-ack */ 6951 cnt++; 6952 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6953 KASSERT(control->length > 0, ("control has zero length")); 6954 if (asoc->size_on_all_streams >= control->length) { 6955 asoc->size_on_all_streams -= control->length; 6956 } else { 6957 #ifdef INVARIANTS 6958 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6959 #else 6960 asoc->size_on_all_streams = 0; 6961 #endif 6962 } 6963 sctp_ucount_decr(asoc->cnt_on_all_streams); 6964 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6965 if (control->on_read_q) { 6966 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6967 control->on_read_q = 0; 6968 } 6969 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6970 control->on_strm_q = 0; 6971 if (control->data) { 6972 sctp_m_freem(control->data); 6973 control->data = NULL; 6974 } 6975 sctp_free_remote_addr(control->whoFrom); 6976 /* Now its reasm? */ 6977 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6978 cnt++; 6979 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6980 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6981 if (asoc->size_on_reasm_queue >= chk->send_size) { 6982 asoc->size_on_reasm_queue -= chk->send_size; 6983 } else { 6984 #ifdef INVARIANTS 6985 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6986 #else 6987 asoc->size_on_reasm_queue = 0; 6988 #endif 6989 } 6990 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6991 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6992 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6993 if (chk->data) { 6994 sctp_m_freem(chk->data); 6995 chk->data = NULL; 6996 } 6997 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6998 } 6999 sctp_free_a_readq(stcb, control); 7000 } 7001 } 7002 } 7003 if (cnt) { 7004 /* We must back down to see what the new highest is */ 7005 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 7006 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 7007 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 7008 asoc->highest_tsn_inside_map = i; 7009 fnd = 1; 7010 break; 7011 } 7012 } 7013 if (!fnd) { 7014 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 7015 } 7016 7017 /* 7018 * Question, should we go through the delivery queue? The 7019 * only reason things are on here is the app not reading OR 7020 * a p-d-api up. An attacker COULD send enough in to 7021 * initiate the PD-API and then send a bunch of stuff to 7022 * other streams... these would wind up on the delivery 7023 * queue.. and then we would not get to them. But in order 7024 * to do this I then have to back-track and un-deliver 7025 * sequence numbers in streams.. el-yucko. I think for now 7026 * we will NOT look at the delivery queue and leave it to be 7027 * something to consider later. An alternative would be to 7028 * abort the P-D-API with a notification and then deliver 7029 * the data.... Or another method might be to keep track of 7030 * how many times the situation occurs and if we see a 7031 * possible attack underway just abort the association. 7032 */ 7033 #ifdef SCTP_DEBUG 7034 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 7035 #endif 7036 /* 7037 * Now do we need to find a new 7038 * asoc->highest_tsn_inside_map? 7039 */ 7040 asoc->last_revoke_count = cnt; 7041 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 7042 /* sa_ignore NO_NULL_CHK */ 7043 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 7044 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 7045 } 7046 /* 7047 * Another issue, in un-setting the TSN's in the mapping array we 7048 * DID NOT adjust the highest_tsn marker. This will cause one of 7049 * two things to occur. It may cause us to do extra work in checking 7050 * for our mapping array movement. More importantly it may cause us 7051 * to SACK every datagram. This may not be a bad thing though since 7052 * we will recover once we get our cum-ack above and all this stuff 7053 * we dumped recovered. 7054 */ 7055 } 7056 7057 void 7058 sctp_drain() 7059 { 7060 /* 7061 * We must walk the PCB lists for ALL associations here. The system 7062 * is LOW on MBUF's and needs help. This is where reneging will 7063 * occur. We really hope this does NOT happen! 7064 */ 7065 VNET_ITERATOR_DECL(vnet_iter); 7066 VNET_LIST_RLOCK_NOSLEEP(); 7067 VNET_FOREACH(vnet_iter) { 7068 CURVNET_SET(vnet_iter); 7069 struct sctp_inpcb *inp; 7070 struct sctp_tcb *stcb; 7071 7072 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7073 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7074 #ifdef VIMAGE 7075 continue; 7076 #else 7077 return; 7078 #endif 7079 } 7080 SCTP_INP_INFO_RLOCK(); 7081 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7082 /* For each endpoint */ 7083 SCTP_INP_RLOCK(inp); 7084 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7085 /* For each association */ 7086 SCTP_TCB_LOCK(stcb); 7087 sctp_drain_mbufs(stcb); 7088 SCTP_TCB_UNLOCK(stcb); 7089 } 7090 SCTP_INP_RUNLOCK(inp); 7091 } 7092 SCTP_INP_INFO_RUNLOCK(); 7093 CURVNET_RESTORE(); 7094 } 7095 VNET_LIST_RUNLOCK_NOSLEEP(); 7096 } 7097 7098 /* 7099 * start a new iterator 7100 * iterates through all endpoints and associations based on the pcb_state 7101 * flags and asoc_state. "af" (mandatory) is executed for all matching 7102 * assocs and "ef" (optional) is executed when the iterator completes. 7103 * "inpf" (optional) is executed for each new endpoint as it is being 7104 * iterated through. inpe (optional) is called when the inp completes 7105 * its way through all the stcbs. 7106 */ 7107 int 7108 sctp_initiate_iterator(inp_func inpf, 7109 asoc_func af, 7110 inp_func inpe, 7111 uint32_t pcb_state, 7112 uint32_t pcb_features, 7113 uint32_t asoc_state, 7114 void *argp, 7115 uint32_t argi, 7116 end_func ef, 7117 struct sctp_inpcb *s_inp, 7118 uint8_t chunk_output_off) 7119 { 7120 struct sctp_iterator *it = NULL; 7121 7122 if (af == NULL) { 7123 return (-1); 7124 } 7125 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7126 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7127 SCTP_BASE_VAR(sctp_pcb_initialized)); 7128 return (-1); 7129 } 7130 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7131 SCTP_M_ITER); 7132 if (it == NULL) { 7133 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7134 return (-1); 7135 } 7136 memset(it, 0, sizeof(*it)); 7137 it->function_assoc = af; 7138 it->function_inp = inpf; 7139 if (inpf) 7140 it->done_current_ep = 0; 7141 else 7142 it->done_current_ep = 1; 7143 it->function_atend = ef; 7144 it->pointer = argp; 7145 it->val = argi; 7146 it->pcb_flags = pcb_state; 7147 it->pcb_features = pcb_features; 7148 it->asoc_state = asoc_state; 7149 it->function_inp_end = inpe; 7150 it->no_chunk_output = chunk_output_off; 7151 it->vn = curvnet; 7152 if (s_inp) { 7153 /* Assume lock is held here */ 7154 it->inp = s_inp; 7155 SCTP_INP_INCR_REF(it->inp); 7156 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7157 } else { 7158 SCTP_INP_INFO_RLOCK(); 7159 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7160 if (it->inp) { 7161 SCTP_INP_INCR_REF(it->inp); 7162 } 7163 SCTP_INP_INFO_RUNLOCK(); 7164 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7165 7166 } 7167 SCTP_IPI_ITERATOR_WQ_LOCK(); 7168 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7169 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7170 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7171 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7172 SCTP_FREE(it, SCTP_M_ITER); 7173 return (-1); 7174 } 7175 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7176 if (sctp_it_ctl.iterator_running == 0) { 7177 sctp_wakeup_iterator(); 7178 } 7179 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7180 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7181 return (0); 7182 } 7183