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 VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62 /* FIX: we don't handle multiple link local scopes */ 63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64 #ifdef INET6 65 int 66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67 { 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return (0); 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return (0); 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79 } 80 #endif 81 82 void 83 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 84 { 85 /* 86 * We really don't need to lock this, but I will just because it 87 * does not hurt. 88 */ 89 SCTP_INP_INFO_RLOCK(); 90 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 91 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 92 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 93 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 94 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 95 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 96 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 97 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 98 SCTP_INP_INFO_RUNLOCK(); 99 } 100 101 /*- 102 * Addresses are added to VRF's (Virtual Router's). For BSD we 103 * have only the default VRF 0. We maintain a hash list of 104 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 105 * these has a list of addresses. When we add a new address 106 * to a VRF we lookup the ifn/ifn_index, if the ifn does 107 * not exist we create it and add it to the list of IFN's 108 * within the VRF. Once we have the sctp_ifn, we add the 109 * address to the list. So we look something like: 110 * 111 * hash-vrf-table 112 * vrf-> ifn-> ifn -> ifn 113 * vrf | 114 * ... +--ifa-> ifa -> ifa 115 * vrf 116 * 117 * We keep these separate lists since the SCTP subsystem will 118 * point to these from its source address selection nets structure. 119 * When an address is deleted it does not happen right away on 120 * the SCTP side, it gets scheduled. What we do when a 121 * delete happens is immediately remove the address from 122 * the master list and decrement the refcount. As our 123 * addip iterator works through and frees the src address 124 * selection pointing to the sctp_ifa, eventually the refcount 125 * will reach 0 and we will delete it. Note that it is assumed 126 * that any locking on system level ifn/ifa is done at the 127 * caller of these functions and these routines will only 128 * lock the SCTP structures as they add or delete things. 129 * 130 * Other notes on VRF concepts. 131 * - An endpoint can be in multiple VRF's 132 * - An association lives within a VRF and only one VRF. 133 * - Any incoming packet we can deduce the VRF for by 134 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 135 * - Any downward send call or connect call must supply the 136 * VRF via ancillary data or via some sort of set default 137 * VRF socket option call (again for BSD no brainer since 138 * the VRF is always 0). 139 * - An endpoint may add multiple VRF's to it. 140 * - Listening sockets can accept associations in any 141 * of the VRF's they are in but the assoc will end up 142 * in only one VRF (gotten from the packet or connect/send). 143 * 144 */ 145 146 struct sctp_vrf * 147 sctp_allocate_vrf(int vrf_id) 148 { 149 struct sctp_vrf *vrf = NULL; 150 struct sctp_vrflist *bucket; 151 152 /* First allocate the VRF structure */ 153 vrf = sctp_find_vrf(vrf_id); 154 if (vrf) { 155 /* Already allocated */ 156 return (vrf); 157 } 158 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 159 SCTP_M_VRF); 160 if (vrf == NULL) { 161 /* No memory */ 162 #ifdef INVARIANTS 163 panic("No memory for VRF:%d", vrf_id); 164 #endif 165 return (NULL); 166 } 167 /* setup the VRF */ 168 memset(vrf, 0, sizeof(struct sctp_vrf)); 169 vrf->vrf_id = vrf_id; 170 LIST_INIT(&vrf->ifnlist); 171 vrf->total_ifa_count = 0; 172 vrf->refcount = 0; 173 /* now also setup table ids */ 174 SCTP_INIT_VRF_TABLEID(vrf); 175 /* Init the HASH of addresses */ 176 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 177 &vrf->vrf_addr_hashmark); 178 if (vrf->vrf_addr_hash == NULL) { 179 /* No memory */ 180 #ifdef INVARIANTS 181 panic("No memory for VRF:%d", vrf_id); 182 #endif 183 SCTP_FREE(vrf, SCTP_M_VRF); 184 return (NULL); 185 } 186 187 /* Add it to the hash table */ 188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 189 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 191 return (vrf); 192 } 193 194 195 struct sctp_ifn * 196 sctp_find_ifn(void *ifn, uint32_t ifn_index) 197 { 198 struct sctp_ifn *sctp_ifnp; 199 struct sctp_ifnlist *hash_ifn_head; 200 201 /* 202 * We assume the lock is held for the addresses if that's wrong 203 * problems could occur :-) 204 */ 205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 207 if (sctp_ifnp->ifn_index == ifn_index) { 208 return (sctp_ifnp); 209 } 210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 211 return (sctp_ifnp); 212 } 213 } 214 return (NULL); 215 } 216 217 218 struct sctp_vrf * 219 sctp_find_vrf(uint32_t vrf_id) 220 { 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231 } 232 233 234 void 235 sctp_free_vrf(struct sctp_vrf *vrf) 236 { 237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 238 if (vrf->vrf_addr_hash) { 239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 240 vrf->vrf_addr_hash = NULL; 241 } 242 /* We zero'd the count */ 243 LIST_REMOVE(vrf, next_vrf); 244 SCTP_FREE(vrf, SCTP_M_VRF); 245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 246 } 247 } 248 249 250 void 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252 { 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261 } 262 263 264 void 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 266 { 267 struct sctp_ifn *sctp_ifnp; 268 269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 270 if (sctp_ifnp != NULL) { 271 sctp_ifnp->ifn_mtu = mtu; 272 } 273 } 274 275 276 void 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 278 { 279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 280 /* We zero'd the count */ 281 if (sctp_ifap->ifn_p) { 282 sctp_free_ifn(sctp_ifap->ifn_p); 283 } 284 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 286 } 287 } 288 289 290 static void 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 292 { 293 struct sctp_ifn *found; 294 295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 296 if (found == NULL) { 297 /* Not in the list.. sorry */ 298 return; 299 } 300 if (hold_addr_lock == 0) 301 SCTP_IPI_ADDR_WLOCK(); 302 LIST_REMOVE(sctp_ifnp, next_bucket); 303 LIST_REMOVE(sctp_ifnp, next_ifn); 304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 305 sctp_ifnp->registered_af); 306 if (hold_addr_lock == 0) 307 SCTP_IPI_ADDR_WUNLOCK(); 308 /* Take away the reference, and possibly free it */ 309 sctp_free_ifn(sctp_ifnp); 310 } 311 312 313 void 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 315 const char *if_name, uint32_t ifn_index) 316 { 317 struct sctp_vrf *vrf; 318 struct sctp_ifa *sctp_ifap; 319 320 SCTP_IPI_ADDR_RLOCK(); 321 vrf = sctp_find_vrf(vrf_id); 322 if (vrf == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 324 goto out; 325 326 } 327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 328 if (sctp_ifap == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 330 goto out; 331 } 332 if (sctp_ifap->ifn_p == NULL) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 334 goto out; 335 } 336 if (if_name) { 337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 339 sctp_ifap->ifn_p->ifn_name, if_name); 340 goto out; 341 } 342 } else { 343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 345 sctp_ifap->ifn_p->ifn_index, ifn_index); 346 goto out; 347 } 348 } 349 350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 352 out: 353 SCTP_IPI_ADDR_RUNLOCK(); 354 } 355 356 357 void 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 359 const char *if_name, uint32_t ifn_index) 360 { 361 struct sctp_vrf *vrf; 362 struct sctp_ifa *sctp_ifap; 363 364 SCTP_IPI_ADDR_RLOCK(); 365 vrf = sctp_find_vrf(vrf_id); 366 if (vrf == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 368 goto out; 369 370 } 371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 372 if (sctp_ifap == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 374 goto out; 375 } 376 if (sctp_ifap->ifn_p == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 378 goto out; 379 } 380 if (if_name) { 381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 383 sctp_ifap->ifn_p->ifn_name, if_name); 384 goto out; 385 } 386 } else { 387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 389 sctp_ifap->ifn_p->ifn_index, ifn_index); 390 goto out; 391 } 392 } 393 394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 396 out: 397 SCTP_IPI_ADDR_RUNLOCK(); 398 } 399 400 401 /*- 402 * Add an ifa to an ifn. 403 * Register the interface as necessary. 404 * NOTE: ADDR write lock MUST be held. 405 */ 406 static void 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 408 { 409 int ifa_af; 410 411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 412 sctp_ifap->ifn_p = sctp_ifnp; 413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 414 /* update address counts */ 415 sctp_ifnp->ifa_count++; 416 ifa_af = sctp_ifap->address.sa.sa_family; 417 switch (ifa_af) { 418 #ifdef INET 419 case AF_INET: 420 sctp_ifnp->num_v4++; 421 break; 422 #endif 423 #ifdef INET6 424 case AF_INET6: 425 sctp_ifnp->num_v6++; 426 break; 427 #endif 428 default: 429 break; 430 } 431 if (sctp_ifnp->ifa_count == 1) { 432 /* register the new interface */ 433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 434 sctp_ifnp->registered_af = ifa_af; 435 } 436 } 437 438 439 /*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445 static void 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447 { 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453 #ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457 #endif 458 #ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462 #endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 476 sctp_ifap->ifn_p->registered_af = AF_INET; 477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 478 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 481 sctp_ifap->ifn_p->registered_af = AF_INET6; 482 } 483 /* free the ifn refcount */ 484 sctp_free_ifn(sctp_ifap->ifn_p); 485 } 486 sctp_ifap->ifn_p = NULL; 487 } 488 } 489 490 491 struct sctp_ifa * 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 493 uint32_t ifn_type, const char *if_name, void *ifa, 494 struct sockaddr *addr, uint32_t ifa_flags, 495 int dynamic_add) 496 { 497 struct sctp_vrf *vrf; 498 struct sctp_ifn *sctp_ifnp = NULL; 499 struct sctp_ifa *sctp_ifap = NULL; 500 struct sctp_ifalist *hash_addr_head; 501 struct sctp_ifnlist *hash_ifn_head; 502 uint32_t hash_of_addr; 503 int new_ifn_af = 0; 504 505 #ifdef SCTP_DEBUG 506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 508 #endif 509 SCTP_IPI_ADDR_WLOCK(); 510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 511 if (sctp_ifnp) { 512 vrf = sctp_ifnp->vrf; 513 } else { 514 vrf = sctp_find_vrf(vrf_id); 515 if (vrf == NULL) { 516 vrf = sctp_allocate_vrf(vrf_id); 517 if (vrf == NULL) { 518 SCTP_IPI_ADDR_WUNLOCK(); 519 return (NULL); 520 } 521 } 522 } 523 if (sctp_ifnp == NULL) { 524 /* 525 * build one and add it, can't hold lock until after malloc 526 * done though. 527 */ 528 SCTP_IPI_ADDR_WUNLOCK(); 529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 530 sizeof(struct sctp_ifn), SCTP_M_IFN); 531 if (sctp_ifnp == NULL) { 532 #ifdef INVARIANTS 533 panic("No memory for IFN"); 534 #endif 535 return (NULL); 536 } 537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 538 sctp_ifnp->ifn_index = ifn_index; 539 sctp_ifnp->ifn_p = ifn; 540 sctp_ifnp->ifn_type = ifn_type; 541 sctp_ifnp->refcount = 0; 542 sctp_ifnp->vrf = vrf; 543 atomic_add_int(&vrf->refcount, 1); 544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 545 if (if_name != NULL) { 546 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 547 } else { 548 SCTP_SNPRINTF(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 549 } 550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 551 LIST_INIT(&sctp_ifnp->ifalist); 552 SCTP_IPI_ADDR_WLOCK(); 553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 556 new_ifn_af = 1; 557 } 558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 559 if (sctp_ifap) { 560 /* Hmm, it already exists? */ 561 if ((sctp_ifap->ifn_p) && 562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 564 sctp_ifap->ifn_p->ifn_name, ifn_index, 565 (void *)sctp_ifap); 566 if (new_ifn_af) { 567 /* Remove the created one that we don't want */ 568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 569 } 570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 571 /* easy to solve, just switch back to active */ 572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 574 sctp_ifap->ifn_p = sctp_ifnp; 575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 576 } 577 exit_stage_left: 578 SCTP_IPI_ADDR_WUNLOCK(); 579 return (sctp_ifap); 580 } else { 581 if (sctp_ifap->ifn_p) { 582 /* 583 * The last IFN gets the address, remove the 584 * old one 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 588 sctp_ifap->ifn_p->ifn_index, if_name, 589 ifn_index); 590 /* remove the address from the old ifn */ 591 sctp_remove_ifa_from_ifn(sctp_ifap); 592 /* move the address over to the new ifn */ 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 goto exit_stage_left; 595 } else { 596 /* repair ifnp which was NULL ? */ 597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 599 (void *)sctp_ifnp, (void *)sctp_ifap); 600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 601 } 602 goto exit_stage_left; 603 } 604 } 605 SCTP_IPI_ADDR_WUNLOCK(); 606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 607 if (sctp_ifap == NULL) { 608 #ifdef INVARIANTS 609 panic("No memory for IFA"); 610 #endif 611 return (NULL); 612 } 613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 614 sctp_ifap->ifn_p = sctp_ifnp; 615 atomic_add_int(&sctp_ifnp->refcount, 1); 616 sctp_ifap->vrf_id = vrf_id; 617 sctp_ifap->ifa = ifa; 618 memcpy(&sctp_ifap->address, addr, addr->sa_len); 619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 620 sctp_ifap->flags = ifa_flags; 621 /* Set scope */ 622 switch (sctp_ifap->address.sa.sa_family) { 623 #ifdef INET 624 case AF_INET: 625 { 626 struct sockaddr_in *sin; 627 628 sin = &sctp_ifap->address.sin; 629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 631 sctp_ifap->src_is_loop = 1; 632 } 633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 634 sctp_ifap->src_is_priv = 1; 635 } 636 sctp_ifnp->num_v4++; 637 if (new_ifn_af) 638 new_ifn_af = AF_INET; 639 break; 640 } 641 #endif 642 #ifdef INET6 643 case AF_INET6: 644 { 645 /* ok to use deprecated addresses? */ 646 struct sockaddr_in6 *sin6; 647 648 sin6 = &sctp_ifap->address.sin6; 649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 651 sctp_ifap->src_is_loop = 1; 652 } 653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 654 sctp_ifap->src_is_priv = 1; 655 } 656 sctp_ifnp->num_v6++; 657 if (new_ifn_af) 658 new_ifn_af = AF_INET6; 659 break; 660 } 661 #endif 662 default: 663 new_ifn_af = 0; 664 break; 665 } 666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 667 668 if ((sctp_ifap->src_is_priv == 0) && 669 (sctp_ifap->src_is_loop == 0)) { 670 sctp_ifap->src_is_glob = 1; 671 } 672 SCTP_IPI_ADDR_WLOCK(); 673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 675 sctp_ifap->refcount = 1; 676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 677 sctp_ifnp->ifa_count++; 678 vrf->total_ifa_count++; 679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 680 if (new_ifn_af) { 681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 682 sctp_ifnp->registered_af = new_ifn_af; 683 } 684 SCTP_IPI_ADDR_WUNLOCK(); 685 if (dynamic_add) { 686 /* 687 * Bump up the refcount so that when the timer completes it 688 * will drop back down. 689 */ 690 struct sctp_laddr *wi; 691 692 atomic_add_int(&sctp_ifap->refcount, 1); 693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 694 if (wi == NULL) { 695 /* 696 * Gak, what can we do? We have lost an address 697 * change can you say HOSED? 698 */ 699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 700 /* Opps, must decrement the count */ 701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 702 if_name); 703 return (NULL); 704 } 705 SCTP_INCR_LADDR_COUNT(); 706 memset(wi, 0, sizeof(*wi)); 707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 708 wi->ifa = sctp_ifap; 709 wi->action = SCTP_ADD_IP_ADDRESS; 710 711 SCTP_WQ_ADDR_LOCK(); 712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 713 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 714 (struct sctp_inpcb *)NULL, 715 (struct sctp_tcb *)NULL, 716 (struct sctp_nets *)NULL); 717 SCTP_WQ_ADDR_UNLOCK(); 718 } else { 719 /* it's ready for use */ 720 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 721 } 722 return (sctp_ifap); 723 } 724 725 void 726 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 727 uint32_t ifn_index, const char *if_name) 728 { 729 struct sctp_vrf *vrf; 730 struct sctp_ifa *sctp_ifap = NULL; 731 732 SCTP_IPI_ADDR_WLOCK(); 733 vrf = sctp_find_vrf(vrf_id); 734 if (vrf == NULL) { 735 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 736 goto out_now; 737 } 738 739 #ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742 #endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. 752 */ 753 if (if_name) { 754 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 755 /* They match its a correct delete */ 756 valid = 1; 757 } 758 } 759 if (!valid) { 760 /* last ditch check ifn_index */ 761 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 762 valid = 1; 763 } 764 } 765 if (!valid) { 766 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 767 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 768 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 769 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 770 SCTP_IPI_ADDR_WUNLOCK(); 771 return; 772 } 773 } 774 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 775 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 776 /* 777 * We don't set the flag. This means that the structure will 778 * hang around in EP's that have bound specific to it until 779 * they close. This gives us TCP like behavior if someone 780 * removes an address (or for that matter adds it right 781 * back). 782 */ 783 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 784 vrf->total_ifa_count--; 785 LIST_REMOVE(sctp_ifap, next_bucket); 786 sctp_remove_ifa_from_ifn(sctp_ifap); 787 } 788 #ifdef SCTP_DEBUG 789 else { 790 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 791 ifn_index); 792 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 793 } 794 #endif 795 796 out_now: 797 SCTP_IPI_ADDR_WUNLOCK(); 798 if (sctp_ifap) { 799 struct sctp_laddr *wi; 800 801 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 802 if (wi == NULL) { 803 /* 804 * Gak, what can we do? We have lost an address 805 * change can you say HOSED? 806 */ 807 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 808 809 /* Oops, must decrement the count */ 810 sctp_free_ifa(sctp_ifap); 811 return; 812 } 813 SCTP_INCR_LADDR_COUNT(); 814 memset(wi, 0, sizeof(*wi)); 815 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 816 wi->ifa = sctp_ifap; 817 wi->action = SCTP_DEL_IP_ADDRESS; 818 SCTP_WQ_ADDR_LOCK(); 819 /* 820 * Should this really be a tailq? As it is we will process 821 * the newest first :-0 822 */ 823 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 824 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 825 (struct sctp_inpcb *)NULL, 826 (struct sctp_tcb *)NULL, 827 (struct sctp_nets *)NULL); 828 SCTP_WQ_ADDR_UNLOCK(); 829 } 830 return; 831 } 832 833 834 static int 835 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 836 { 837 int loopback_scope; 838 #if defined(INET) 839 int ipv4_local_scope, ipv4_addr_legal; 840 #endif 841 #if defined(INET6) 842 int local_scope, site_scope, ipv6_addr_legal; 843 #endif 844 struct sctp_vrf *vrf; 845 struct sctp_ifn *sctp_ifn; 846 struct sctp_ifa *sctp_ifa; 847 848 loopback_scope = stcb->asoc.scope.loopback_scope; 849 #if defined(INET) 850 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 851 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 852 #endif 853 #if defined(INET6) 854 local_scope = stcb->asoc.scope.local_scope; 855 site_scope = stcb->asoc.scope.site_scope; 856 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 857 #endif 858 859 SCTP_IPI_ADDR_RLOCK(); 860 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 861 if (vrf == NULL) { 862 /* no vrf, no addresses */ 863 SCTP_IPI_ADDR_RUNLOCK(); 864 return (0); 865 } 866 867 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 868 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 869 if ((loopback_scope == 0) && 870 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 871 continue; 872 } 873 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 874 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 875 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 876 /* 877 * We allow pending addresses, where 878 * we have sent an asconf-add to be 879 * considered valid. 880 */ 881 continue; 882 } 883 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 884 continue; 885 } 886 switch (sctp_ifa->address.sa.sa_family) { 887 #ifdef INET 888 case AF_INET: 889 if (ipv4_addr_legal) { 890 struct sockaddr_in *sin, 891 *rsin; 892 893 sin = &sctp_ifa->address.sin; 894 rsin = (struct sockaddr_in *)to; 895 if ((ipv4_local_scope == 0) && 896 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 897 continue; 898 } 899 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 900 &sin->sin_addr) != 0) { 901 continue; 902 } 903 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 904 SCTP_IPI_ADDR_RUNLOCK(); 905 return (1); 906 } 907 } 908 break; 909 #endif 910 #ifdef INET6 911 case AF_INET6: 912 if (ipv6_addr_legal) { 913 struct sockaddr_in6 *sin6, 914 *rsin6; 915 916 sin6 = &sctp_ifa->address.sin6; 917 rsin6 = (struct sockaddr_in6 *)to; 918 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 919 &sin6->sin6_addr) != 0) { 920 continue; 921 } 922 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 923 if (local_scope == 0) 924 continue; 925 if (sin6->sin6_scope_id == 0) { 926 if (sa6_recoverscope(sin6) != 0) 927 continue; 928 } 929 } 930 if ((site_scope == 0) && 931 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 932 continue; 933 } 934 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 935 SCTP_IPI_ADDR_RUNLOCK(); 936 return (1); 937 } 938 } 939 break; 940 #endif 941 default: 942 /* TSNH */ 943 break; 944 } 945 } 946 } 947 } else { 948 struct sctp_laddr *laddr; 949 950 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 951 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 952 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 953 continue; 954 } 955 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 956 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 957 /* 958 * We allow pending addresses, where we have 959 * sent an asconf-add to be considered 960 * valid. 961 */ 962 continue; 963 } 964 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 965 continue; 966 } 967 switch (to->sa_family) { 968 #ifdef INET 969 case AF_INET: 970 { 971 struct sockaddr_in *sin, *rsin; 972 973 sin = &laddr->ifa->address.sin; 974 rsin = (struct sockaddr_in *)to; 975 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 976 SCTP_IPI_ADDR_RUNLOCK(); 977 return (1); 978 } 979 break; 980 } 981 #endif 982 #ifdef INET6 983 case AF_INET6: 984 { 985 struct sockaddr_in6 *sin6, *rsin6; 986 987 sin6 = &laddr->ifa->address.sin6; 988 rsin6 = (struct sockaddr_in6 *)to; 989 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 990 SCTP_IPI_ADDR_RUNLOCK(); 991 return (1); 992 } 993 break; 994 } 995 996 #endif 997 default: 998 /* TSNH */ 999 break; 1000 } 1001 1002 } 1003 } 1004 SCTP_IPI_ADDR_RUNLOCK(); 1005 return (0); 1006 } 1007 1008 1009 static struct sctp_tcb * 1010 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1011 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1012 { 1013 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1014 /* 1015 * If we support the TCP model, then we must now dig through to see 1016 * if we can find our endpoint in the list of tcp ep's. 1017 */ 1018 uint16_t lport, rport; 1019 struct sctppcbhead *ephead; 1020 struct sctp_inpcb *inp; 1021 struct sctp_laddr *laddr; 1022 struct sctp_tcb *stcb; 1023 struct sctp_nets *net; 1024 1025 if ((to == NULL) || (from == NULL)) { 1026 return (NULL); 1027 } 1028 1029 switch (to->sa_family) { 1030 #ifdef INET 1031 case AF_INET: 1032 if (from->sa_family == AF_INET) { 1033 lport = ((struct sockaddr_in *)to)->sin_port; 1034 rport = ((struct sockaddr_in *)from)->sin_port; 1035 } else { 1036 return (NULL); 1037 } 1038 break; 1039 #endif 1040 #ifdef INET6 1041 case AF_INET6: 1042 if (from->sa_family == AF_INET6) { 1043 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1044 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1045 } else { 1046 return (NULL); 1047 } 1048 break; 1049 #endif 1050 default: 1051 return (NULL); 1052 } 1053 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1054 /* 1055 * Ok now for each of the guys in this bucket we must look and see: 1056 * - Does the remote port match. - Does there single association's 1057 * addresses match this address (to). If so we update p_ep to point 1058 * to this ep and return the tcb from it. 1059 */ 1060 LIST_FOREACH(inp, ephead, sctp_hash) { 1061 SCTP_INP_RLOCK(inp); 1062 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1063 SCTP_INP_RUNLOCK(inp); 1064 continue; 1065 } 1066 if (lport != inp->sctp_lport) { 1067 SCTP_INP_RUNLOCK(inp); 1068 continue; 1069 } 1070 switch (to->sa_family) { 1071 #ifdef INET 1072 case AF_INET: 1073 { 1074 struct sockaddr_in *sin; 1075 1076 sin = (struct sockaddr_in *)to; 1077 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1078 &sin->sin_addr) != 0) { 1079 SCTP_INP_RUNLOCK(inp); 1080 continue; 1081 } 1082 break; 1083 } 1084 #endif 1085 #ifdef INET6 1086 case AF_INET6: 1087 { 1088 struct sockaddr_in6 *sin6; 1089 1090 sin6 = (struct sockaddr_in6 *)to; 1091 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1092 &sin6->sin6_addr) != 0) { 1093 SCTP_INP_RUNLOCK(inp); 1094 continue; 1095 } 1096 break; 1097 } 1098 #endif 1099 default: 1100 SCTP_INP_RUNLOCK(inp); 1101 continue; 1102 } 1103 if (inp->def_vrf_id != vrf_id) { 1104 SCTP_INP_RUNLOCK(inp); 1105 continue; 1106 } 1107 /* check to see if the ep has one of the addresses */ 1108 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1109 /* We are NOT bound all, so look further */ 1110 int match = 0; 1111 1112 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1113 1114 if (laddr->ifa == NULL) { 1115 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1116 continue; 1117 } 1118 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1119 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1120 continue; 1121 } 1122 if (laddr->ifa->address.sa.sa_family == 1123 to->sa_family) { 1124 /* see if it matches */ 1125 #ifdef INET 1126 if (from->sa_family == AF_INET) { 1127 struct sockaddr_in *intf_addr, 1128 *sin; 1129 1130 intf_addr = &laddr->ifa->address.sin; 1131 sin = (struct sockaddr_in *)to; 1132 if (sin->sin_addr.s_addr == 1133 intf_addr->sin_addr.s_addr) { 1134 match = 1; 1135 break; 1136 } 1137 } 1138 #endif 1139 #ifdef INET6 1140 if (from->sa_family == AF_INET6) { 1141 struct sockaddr_in6 *intf_addr6; 1142 struct sockaddr_in6 *sin6; 1143 1144 sin6 = (struct sockaddr_in6 *) 1145 to; 1146 intf_addr6 = &laddr->ifa->address.sin6; 1147 1148 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1149 intf_addr6)) { 1150 match = 1; 1151 break; 1152 } 1153 } 1154 #endif 1155 } 1156 } 1157 if (match == 0) { 1158 /* This endpoint does not have this address */ 1159 SCTP_INP_RUNLOCK(inp); 1160 continue; 1161 } 1162 } 1163 /* 1164 * Ok if we hit here the ep has the address, does it hold 1165 * the tcb? 1166 */ 1167 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1168 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1169 if (stcb == NULL) { 1170 SCTP_INP_RUNLOCK(inp); 1171 continue; 1172 } 1173 SCTP_TCB_LOCK(stcb); 1174 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1175 SCTP_TCB_UNLOCK(stcb); 1176 SCTP_INP_RUNLOCK(inp); 1177 continue; 1178 } 1179 if (stcb->rport != rport) { 1180 /* remote port does not match. */ 1181 SCTP_TCB_UNLOCK(stcb); 1182 SCTP_INP_RUNLOCK(inp); 1183 continue; 1184 } 1185 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1186 SCTP_TCB_UNLOCK(stcb); 1187 SCTP_INP_RUNLOCK(inp); 1188 continue; 1189 } 1190 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1191 SCTP_TCB_UNLOCK(stcb); 1192 SCTP_INP_RUNLOCK(inp); 1193 continue; 1194 } 1195 /* Does this TCB have a matching address? */ 1196 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1197 1198 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1199 /* not the same family, can't be a match */ 1200 continue; 1201 } 1202 switch (from->sa_family) { 1203 #ifdef INET 1204 case AF_INET: 1205 { 1206 struct sockaddr_in *sin, *rsin; 1207 1208 sin = (struct sockaddr_in *)&net->ro._l_addr; 1209 rsin = (struct sockaddr_in *)from; 1210 if (sin->sin_addr.s_addr == 1211 rsin->sin_addr.s_addr) { 1212 /* found it */ 1213 if (netp != NULL) { 1214 *netp = net; 1215 } 1216 /* 1217 * Update the endpoint 1218 * pointer 1219 */ 1220 *inp_p = inp; 1221 SCTP_INP_RUNLOCK(inp); 1222 return (stcb); 1223 } 1224 break; 1225 } 1226 #endif 1227 #ifdef INET6 1228 case AF_INET6: 1229 { 1230 struct sockaddr_in6 *sin6, *rsin6; 1231 1232 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1233 rsin6 = (struct sockaddr_in6 *)from; 1234 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1235 rsin6)) { 1236 /* found it */ 1237 if (netp != NULL) { 1238 *netp = net; 1239 } 1240 /* 1241 * Update the endpoint 1242 * pointer 1243 */ 1244 *inp_p = inp; 1245 SCTP_INP_RUNLOCK(inp); 1246 return (stcb); 1247 } 1248 break; 1249 } 1250 #endif 1251 default: 1252 /* TSNH */ 1253 break; 1254 } 1255 } 1256 SCTP_TCB_UNLOCK(stcb); 1257 SCTP_INP_RUNLOCK(inp); 1258 } 1259 return (NULL); 1260 } 1261 1262 1263 /* 1264 * rules for use 1265 * 1266 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1267 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1268 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1269 * NULL. 1270 */ 1271 1272 struct sctp_tcb * 1273 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1274 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1275 { 1276 struct sctpasochead *head; 1277 struct sctp_inpcb *inp; 1278 struct sctp_tcb *stcb = NULL; 1279 struct sctp_nets *net; 1280 uint16_t rport; 1281 1282 inp = *inp_p; 1283 switch (remote->sa_family) { 1284 #ifdef INET 1285 case AF_INET: 1286 rport = (((struct sockaddr_in *)remote)->sin_port); 1287 break; 1288 #endif 1289 #ifdef INET6 1290 case AF_INET6: 1291 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1292 break; 1293 #endif 1294 default: 1295 return (NULL); 1296 } 1297 if (locked_tcb) { 1298 /* 1299 * UN-lock so we can do proper locking here this occurs when 1300 * called from load_addresses_from_init. 1301 */ 1302 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1303 SCTP_TCB_UNLOCK(locked_tcb); 1304 } 1305 SCTP_INP_INFO_RLOCK(); 1306 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1307 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1308 /*- 1309 * Now either this guy is our listener or it's the 1310 * connector. If it is the one that issued the connect, then 1311 * it's only chance is to be the first TCB in the list. If 1312 * it is the acceptor, then do the special_lookup to hash 1313 * and find the real inp. 1314 */ 1315 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1316 /* to is peer addr, from is my addr */ 1317 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1318 netp, inp->def_vrf_id); 1319 if ((stcb != NULL) && (locked_tcb == NULL)) { 1320 /* we have a locked tcb, lower refcount */ 1321 SCTP_INP_DECR_REF(inp); 1322 } 1323 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1324 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1325 SCTP_TCB_LOCK(locked_tcb); 1326 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1327 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1328 } 1329 SCTP_INP_INFO_RUNLOCK(); 1330 return (stcb); 1331 } else { 1332 SCTP_INP_WLOCK(inp); 1333 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1334 goto null_return; 1335 } 1336 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1337 if (stcb == NULL) { 1338 goto null_return; 1339 } 1340 SCTP_TCB_LOCK(stcb); 1341 1342 if (stcb->rport != rport) { 1343 /* remote port does not match. */ 1344 SCTP_TCB_UNLOCK(stcb); 1345 goto null_return; 1346 } 1347 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1348 SCTP_TCB_UNLOCK(stcb); 1349 goto null_return; 1350 } 1351 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1352 SCTP_TCB_UNLOCK(stcb); 1353 goto null_return; 1354 } 1355 /* now look at the list of remote addresses */ 1356 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1357 #ifdef INVARIANTS 1358 if (net == (TAILQ_NEXT(net, sctp_next))) { 1359 panic("Corrupt net list"); 1360 } 1361 #endif 1362 if (net->ro._l_addr.sa.sa_family != 1363 remote->sa_family) { 1364 /* not the same family */ 1365 continue; 1366 } 1367 switch (remote->sa_family) { 1368 #ifdef INET 1369 case AF_INET: 1370 { 1371 struct sockaddr_in *sin, 1372 *rsin; 1373 1374 sin = (struct sockaddr_in *) 1375 &net->ro._l_addr; 1376 rsin = (struct sockaddr_in *)remote; 1377 if (sin->sin_addr.s_addr == 1378 rsin->sin_addr.s_addr) { 1379 /* found it */ 1380 if (netp != NULL) { 1381 *netp = net; 1382 } 1383 if (locked_tcb == NULL) { 1384 SCTP_INP_DECR_REF(inp); 1385 } else if (locked_tcb != stcb) { 1386 SCTP_TCB_LOCK(locked_tcb); 1387 } 1388 if (locked_tcb) { 1389 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1390 } 1391 1392 SCTP_INP_WUNLOCK(inp); 1393 SCTP_INP_INFO_RUNLOCK(); 1394 return (stcb); 1395 } 1396 break; 1397 } 1398 #endif 1399 #ifdef INET6 1400 case AF_INET6: 1401 { 1402 struct sockaddr_in6 *sin6, 1403 *rsin6; 1404 1405 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1406 rsin6 = (struct sockaddr_in6 *)remote; 1407 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1408 rsin6)) { 1409 /* found it */ 1410 if (netp != NULL) { 1411 *netp = net; 1412 } 1413 if (locked_tcb == NULL) { 1414 SCTP_INP_DECR_REF(inp); 1415 } else if (locked_tcb != stcb) { 1416 SCTP_TCB_LOCK(locked_tcb); 1417 } 1418 if (locked_tcb) { 1419 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1420 } 1421 SCTP_INP_WUNLOCK(inp); 1422 SCTP_INP_INFO_RUNLOCK(); 1423 return (stcb); 1424 } 1425 break; 1426 } 1427 #endif 1428 default: 1429 /* TSNH */ 1430 break; 1431 } 1432 } 1433 SCTP_TCB_UNLOCK(stcb); 1434 } 1435 } else { 1436 SCTP_INP_WLOCK(inp); 1437 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1438 goto null_return; 1439 } 1440 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1441 inp->sctp_hashmark)]; 1442 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1443 if (stcb->rport != rport) { 1444 /* remote port does not match */ 1445 continue; 1446 } 1447 SCTP_TCB_LOCK(stcb); 1448 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1449 SCTP_TCB_UNLOCK(stcb); 1450 continue; 1451 } 1452 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1453 SCTP_TCB_UNLOCK(stcb); 1454 continue; 1455 } 1456 /* now look at the list of remote addresses */ 1457 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1458 #ifdef INVARIANTS 1459 if (net == (TAILQ_NEXT(net, sctp_next))) { 1460 panic("Corrupt net list"); 1461 } 1462 #endif 1463 if (net->ro._l_addr.sa.sa_family != 1464 remote->sa_family) { 1465 /* not the same family */ 1466 continue; 1467 } 1468 switch (remote->sa_family) { 1469 #ifdef INET 1470 case AF_INET: 1471 { 1472 struct sockaddr_in *sin, 1473 *rsin; 1474 1475 sin = (struct sockaddr_in *) 1476 &net->ro._l_addr; 1477 rsin = (struct sockaddr_in *)remote; 1478 if (sin->sin_addr.s_addr == 1479 rsin->sin_addr.s_addr) { 1480 /* found it */ 1481 if (netp != NULL) { 1482 *netp = net; 1483 } 1484 if (locked_tcb == NULL) { 1485 SCTP_INP_DECR_REF(inp); 1486 } else if (locked_tcb != stcb) { 1487 SCTP_TCB_LOCK(locked_tcb); 1488 } 1489 if (locked_tcb) { 1490 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1491 } 1492 SCTP_INP_WUNLOCK(inp); 1493 SCTP_INP_INFO_RUNLOCK(); 1494 return (stcb); 1495 } 1496 break; 1497 } 1498 #endif 1499 #ifdef INET6 1500 case AF_INET6: 1501 { 1502 struct sockaddr_in6 *sin6, 1503 *rsin6; 1504 1505 sin6 = (struct sockaddr_in6 *) 1506 &net->ro._l_addr; 1507 rsin6 = (struct sockaddr_in6 *)remote; 1508 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1509 rsin6)) { 1510 /* found it */ 1511 if (netp != NULL) { 1512 *netp = net; 1513 } 1514 if (locked_tcb == NULL) { 1515 SCTP_INP_DECR_REF(inp); 1516 } else if (locked_tcb != stcb) { 1517 SCTP_TCB_LOCK(locked_tcb); 1518 } 1519 if (locked_tcb) { 1520 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1521 } 1522 SCTP_INP_WUNLOCK(inp); 1523 SCTP_INP_INFO_RUNLOCK(); 1524 return (stcb); 1525 } 1526 break; 1527 } 1528 #endif 1529 default: 1530 /* TSNH */ 1531 break; 1532 } 1533 } 1534 SCTP_TCB_UNLOCK(stcb); 1535 } 1536 } 1537 null_return: 1538 /* clean up for returning null */ 1539 if (locked_tcb) { 1540 SCTP_TCB_LOCK(locked_tcb); 1541 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1542 } 1543 SCTP_INP_WUNLOCK(inp); 1544 SCTP_INP_INFO_RUNLOCK(); 1545 /* not found */ 1546 return (NULL); 1547 } 1548 1549 1550 /* 1551 * Find an association for a specific endpoint using the association id given 1552 * out in the COMM_UP notification 1553 */ 1554 struct sctp_tcb * 1555 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1556 { 1557 /* 1558 * Use my the assoc_id to find a endpoint 1559 */ 1560 struct sctpasochead *head; 1561 struct sctp_tcb *stcb; 1562 uint32_t id; 1563 1564 if (inp == NULL) { 1565 SCTP_PRINTF("TSNH ep_associd\n"); 1566 return (NULL); 1567 } 1568 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1569 SCTP_PRINTF("TSNH ep_associd0\n"); 1570 return (NULL); 1571 } 1572 id = (uint32_t)asoc_id; 1573 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1574 if (head == NULL) { 1575 /* invalid id TSNH */ 1576 SCTP_PRINTF("TSNH ep_associd1\n"); 1577 return (NULL); 1578 } 1579 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1580 if (stcb->asoc.assoc_id == id) { 1581 if (inp != stcb->sctp_ep) { 1582 /* 1583 * some other guy has the same id active (id 1584 * collision ??). 1585 */ 1586 SCTP_PRINTF("TSNH ep_associd2\n"); 1587 continue; 1588 } 1589 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1590 continue; 1591 } 1592 if (want_lock) { 1593 SCTP_TCB_LOCK(stcb); 1594 } 1595 return (stcb); 1596 } 1597 } 1598 return (NULL); 1599 } 1600 1601 1602 struct sctp_tcb * 1603 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1604 { 1605 struct sctp_tcb *stcb; 1606 1607 SCTP_INP_RLOCK(inp); 1608 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1609 SCTP_INP_RUNLOCK(inp); 1610 return (stcb); 1611 } 1612 1613 1614 /* 1615 * Endpoint probe expects that the INP_INFO is locked. 1616 */ 1617 static struct sctp_inpcb * 1618 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1619 uint16_t lport, uint32_t vrf_id) 1620 { 1621 struct sctp_inpcb *inp; 1622 struct sctp_laddr *laddr; 1623 #ifdef INET 1624 struct sockaddr_in *sin; 1625 #endif 1626 #ifdef INET6 1627 struct sockaddr_in6 *sin6; 1628 struct sockaddr_in6 *intf_addr6; 1629 #endif 1630 int fnd; 1631 1632 #ifdef INET 1633 sin = NULL; 1634 #endif 1635 #ifdef INET6 1636 sin6 = NULL; 1637 #endif 1638 switch (nam->sa_family) { 1639 #ifdef INET 1640 case AF_INET: 1641 sin = (struct sockaddr_in *)nam; 1642 break; 1643 #endif 1644 #ifdef INET6 1645 case AF_INET6: 1646 sin6 = (struct sockaddr_in6 *)nam; 1647 break; 1648 #endif 1649 default: 1650 /* unsupported family */ 1651 return (NULL); 1652 } 1653 1654 if (head == NULL) 1655 return (NULL); 1656 1657 LIST_FOREACH(inp, head, sctp_hash) { 1658 SCTP_INP_RLOCK(inp); 1659 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1660 SCTP_INP_RUNLOCK(inp); 1661 continue; 1662 } 1663 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1664 (inp->sctp_lport == lport)) { 1665 /* got it */ 1666 switch (nam->sa_family) { 1667 #ifdef INET 1668 case AF_INET: 1669 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1670 SCTP_IPV6_V6ONLY(inp)) { 1671 /* 1672 * IPv4 on a IPv6 socket with ONLY 1673 * IPv6 set 1674 */ 1675 SCTP_INP_RUNLOCK(inp); 1676 continue; 1677 } 1678 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1679 &sin->sin_addr) != 0) { 1680 SCTP_INP_RUNLOCK(inp); 1681 continue; 1682 } 1683 break; 1684 #endif 1685 #ifdef INET6 1686 case AF_INET6: 1687 /* 1688 * A V6 address and the endpoint is NOT 1689 * bound V6 1690 */ 1691 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1692 SCTP_INP_RUNLOCK(inp); 1693 continue; 1694 } 1695 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1696 &sin6->sin6_addr) != 0) { 1697 SCTP_INP_RUNLOCK(inp); 1698 continue; 1699 } 1700 break; 1701 #endif 1702 default: 1703 break; 1704 } 1705 /* does a VRF id match? */ 1706 fnd = 0; 1707 if (inp->def_vrf_id == vrf_id) 1708 fnd = 1; 1709 1710 SCTP_INP_RUNLOCK(inp); 1711 if (!fnd) 1712 continue; 1713 return (inp); 1714 } 1715 SCTP_INP_RUNLOCK(inp); 1716 } 1717 switch (nam->sa_family) { 1718 #ifdef INET 1719 case AF_INET: 1720 if (sin->sin_addr.s_addr == INADDR_ANY) { 1721 /* Can't hunt for one that has no address specified */ 1722 return (NULL); 1723 } 1724 break; 1725 #endif 1726 #ifdef INET6 1727 case AF_INET6: 1728 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1729 /* Can't hunt for one that has no address specified */ 1730 return (NULL); 1731 } 1732 break; 1733 #endif 1734 default: 1735 break; 1736 } 1737 /* 1738 * ok, not bound to all so see if we can find a EP bound to this 1739 * address. 1740 */ 1741 LIST_FOREACH(inp, head, sctp_hash) { 1742 SCTP_INP_RLOCK(inp); 1743 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1744 SCTP_INP_RUNLOCK(inp); 1745 continue; 1746 } 1747 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1748 SCTP_INP_RUNLOCK(inp); 1749 continue; 1750 } 1751 /* 1752 * Ok this could be a likely candidate, look at all of its 1753 * addresses 1754 */ 1755 if (inp->sctp_lport != lport) { 1756 SCTP_INP_RUNLOCK(inp); 1757 continue; 1758 } 1759 /* does a VRF id match? */ 1760 fnd = 0; 1761 if (inp->def_vrf_id == vrf_id) 1762 fnd = 1; 1763 1764 if (!fnd) { 1765 SCTP_INP_RUNLOCK(inp); 1766 continue; 1767 } 1768 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1769 if (laddr->ifa == NULL) { 1770 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1771 __func__); 1772 continue; 1773 } 1774 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1775 (void *)laddr->ifa); 1776 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1777 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1778 continue; 1779 } 1780 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1781 /* possible, see if it matches */ 1782 switch (nam->sa_family) { 1783 #ifdef INET 1784 case AF_INET: 1785 if (sin->sin_addr.s_addr == 1786 laddr->ifa->address.sin.sin_addr.s_addr) { 1787 SCTP_INP_RUNLOCK(inp); 1788 return (inp); 1789 } 1790 break; 1791 #endif 1792 #ifdef INET6 1793 case AF_INET6: 1794 intf_addr6 = &laddr->ifa->address.sin6; 1795 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1796 intf_addr6)) { 1797 SCTP_INP_RUNLOCK(inp); 1798 return (inp); 1799 } 1800 break; 1801 #endif 1802 } 1803 } 1804 } 1805 SCTP_INP_RUNLOCK(inp); 1806 } 1807 return (NULL); 1808 } 1809 1810 1811 static struct sctp_inpcb * 1812 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1813 { 1814 struct sctppcbhead *head; 1815 struct sctp_inpcb *t_inp; 1816 int fnd; 1817 1818 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1819 SCTP_BASE_INFO(hashmark))]; 1820 LIST_FOREACH(t_inp, head, sctp_hash) { 1821 if (t_inp->sctp_lport != lport) { 1822 continue; 1823 } 1824 /* is it in the VRF in question */ 1825 fnd = 0; 1826 if (t_inp->def_vrf_id == vrf_id) 1827 fnd = 1; 1828 if (!fnd) 1829 continue; 1830 1831 /* This one is in use. */ 1832 /* check the v6/v4 binding issue */ 1833 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1834 SCTP_IPV6_V6ONLY(t_inp)) { 1835 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1836 /* collision in V6 space */ 1837 return (t_inp); 1838 } else { 1839 /* inp is BOUND_V4 no conflict */ 1840 continue; 1841 } 1842 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1843 /* t_inp is bound v4 and v6, conflict always */ 1844 return (t_inp); 1845 } else { 1846 /* t_inp is bound only V4 */ 1847 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1848 SCTP_IPV6_V6ONLY(inp)) { 1849 /* no conflict */ 1850 continue; 1851 } 1852 /* else fall through to conflict */ 1853 } 1854 return (t_inp); 1855 } 1856 return (NULL); 1857 } 1858 1859 1860 int 1861 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1862 { 1863 /* For 1-2-1 with port reuse */ 1864 struct sctppcbhead *head; 1865 struct sctp_inpcb *tinp, *ninp; 1866 1867 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1868 /* only works with port reuse on */ 1869 return (-1); 1870 } 1871 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1872 return (0); 1873 } 1874 SCTP_INP_RUNLOCK(inp); 1875 SCTP_INP_INFO_WLOCK(); 1876 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1877 SCTP_BASE_INFO(hashmark))]; 1878 /* Kick out all non-listeners to the TCP hash */ 1879 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1880 if (tinp->sctp_lport != inp->sctp_lport) { 1881 continue; 1882 } 1883 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1884 continue; 1885 } 1886 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1887 continue; 1888 } 1889 if (SCTP_IS_LISTENING(tinp)) { 1890 continue; 1891 } 1892 SCTP_INP_WLOCK(tinp); 1893 LIST_REMOVE(tinp, sctp_hash); 1894 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1895 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1896 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1897 SCTP_INP_WUNLOCK(tinp); 1898 } 1899 SCTP_INP_WLOCK(inp); 1900 /* Pull from where he was */ 1901 LIST_REMOVE(inp, sctp_hash); 1902 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1903 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1904 LIST_INSERT_HEAD(head, inp, sctp_hash); 1905 SCTP_INP_WUNLOCK(inp); 1906 SCTP_INP_RLOCK(inp); 1907 SCTP_INP_INFO_WUNLOCK(); 1908 return (0); 1909 } 1910 1911 1912 struct sctp_inpcb * 1913 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1914 uint32_t vrf_id) 1915 { 1916 /* 1917 * First we check the hash table to see if someone has this port 1918 * bound with just the port. 1919 */ 1920 struct sctp_inpcb *inp; 1921 struct sctppcbhead *head; 1922 int lport; 1923 unsigned int i; 1924 #ifdef INET 1925 struct sockaddr_in *sin; 1926 #endif 1927 #ifdef INET6 1928 struct sockaddr_in6 *sin6; 1929 #endif 1930 1931 switch (nam->sa_family) { 1932 #ifdef INET 1933 case AF_INET: 1934 sin = (struct sockaddr_in *)nam; 1935 lport = sin->sin_port; 1936 break; 1937 #endif 1938 #ifdef INET6 1939 case AF_INET6: 1940 sin6 = (struct sockaddr_in6 *)nam; 1941 lport = sin6->sin6_port; 1942 break; 1943 #endif 1944 default: 1945 return (NULL); 1946 } 1947 /* 1948 * I could cheat here and just cast to one of the types but we will 1949 * do it right. It also provides the check against an Unsupported 1950 * type too. 1951 */ 1952 /* Find the head of the ALLADDR chain */ 1953 if (have_lock == 0) { 1954 SCTP_INP_INFO_RLOCK(); 1955 } 1956 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1957 SCTP_BASE_INFO(hashmark))]; 1958 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1959 1960 /* 1961 * If the TCP model exists it could be that the main listening 1962 * endpoint is gone but there still exists a connected socket for 1963 * this guy. If so we can return the first one that we find. This 1964 * may NOT be the correct one so the caller should be wary on the 1965 * returned INP. Currently the only caller that sets find_tcp_pool 1966 * is in bindx where we are verifying that a user CAN bind the 1967 * address. He either has bound it already, or someone else has, or 1968 * its open to bind, so this is good enough. 1969 */ 1970 if (inp == NULL && find_tcp_pool) { 1971 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1972 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1973 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1974 if (inp) { 1975 break; 1976 } 1977 } 1978 } 1979 if (inp) { 1980 SCTP_INP_INCR_REF(inp); 1981 } 1982 if (have_lock == 0) { 1983 SCTP_INP_INFO_RUNLOCK(); 1984 } 1985 return (inp); 1986 } 1987 1988 1989 /* 1990 * Find an association for an endpoint with the pointer to whom you want to 1991 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1992 * need to change the *to to some other struct like a mbuf... 1993 */ 1994 struct sctp_tcb * 1995 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1996 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1997 uint32_t vrf_id) 1998 { 1999 struct sctp_inpcb *inp = NULL; 2000 struct sctp_tcb *stcb; 2001 2002 SCTP_INP_INFO_RLOCK(); 2003 if (find_tcp_pool) { 2004 if (inp_p != NULL) { 2005 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2006 vrf_id); 2007 } else { 2008 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2009 vrf_id); 2010 } 2011 if (stcb != NULL) { 2012 SCTP_INP_INFO_RUNLOCK(); 2013 return (stcb); 2014 } 2015 } 2016 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2017 if (inp_p != NULL) { 2018 *inp_p = inp; 2019 } 2020 SCTP_INP_INFO_RUNLOCK(); 2021 if (inp == NULL) { 2022 return (NULL); 2023 } 2024 /* 2025 * ok, we have an endpoint, now lets find the assoc for it (if any) 2026 * we now place the source address or from in the to of the find 2027 * endpoint call. Since in reality this chain is used from the 2028 * inbound packet side. 2029 */ 2030 if (inp_p != NULL) { 2031 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2032 NULL); 2033 } else { 2034 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2035 NULL); 2036 } 2037 return (stcb); 2038 } 2039 2040 2041 /* 2042 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2043 * find all addresses that the sender has specified in any address list. Each 2044 * address will be used to lookup the TCB and see if one exits. 2045 */ 2046 static struct sctp_tcb * 2047 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2048 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2049 struct sockaddr *dst) 2050 { 2051 struct sctp_paramhdr *phdr, param_buf; 2052 #if defined(INET) || defined(INET6) 2053 struct sctp_tcb *stcb; 2054 uint16_t ptype; 2055 #endif 2056 uint16_t plen; 2057 #ifdef INET 2058 struct sockaddr_in sin4; 2059 #endif 2060 #ifdef INET6 2061 struct sockaddr_in6 sin6; 2062 #endif 2063 2064 #ifdef INET 2065 memset(&sin4, 0, sizeof(sin4)); 2066 sin4.sin_len = sizeof(sin4); 2067 sin4.sin_family = AF_INET; 2068 sin4.sin_port = sh->src_port; 2069 #endif 2070 #ifdef INET6 2071 memset(&sin6, 0, sizeof(sin6)); 2072 sin6.sin6_len = sizeof(sin6); 2073 sin6.sin6_family = AF_INET6; 2074 sin6.sin6_port = sh->src_port; 2075 #endif 2076 2077 offset += sizeof(struct sctp_init_chunk); 2078 2079 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2080 while (phdr != NULL) { 2081 /* now we must see if we want the parameter */ 2082 #if defined(INET) || defined(INET6) 2083 ptype = ntohs(phdr->param_type); 2084 #endif 2085 plen = ntohs(phdr->param_length); 2086 if (plen == 0) { 2087 break; 2088 } 2089 #ifdef INET 2090 if (ptype == SCTP_IPV4_ADDRESS && 2091 plen == sizeof(struct sctp_ipv4addr_param)) { 2092 /* Get the rest of the address */ 2093 struct sctp_ipv4addr_param ip4_param, *p4; 2094 2095 phdr = sctp_get_next_param(m, offset, 2096 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2097 if (phdr == NULL) { 2098 return (NULL); 2099 } 2100 p4 = (struct sctp_ipv4addr_param *)phdr; 2101 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2102 /* look it up */ 2103 stcb = sctp_findassociation_ep_addr(inp_p, 2104 (struct sockaddr *)&sin4, netp, dst, NULL); 2105 if (stcb != NULL) { 2106 return (stcb); 2107 } 2108 } 2109 #endif 2110 #ifdef INET6 2111 if (ptype == SCTP_IPV6_ADDRESS && 2112 plen == sizeof(struct sctp_ipv6addr_param)) { 2113 /* Get the rest of the address */ 2114 struct sctp_ipv6addr_param ip6_param, *p6; 2115 2116 phdr = sctp_get_next_param(m, offset, 2117 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2118 if (phdr == NULL) { 2119 return (NULL); 2120 } 2121 p6 = (struct sctp_ipv6addr_param *)phdr; 2122 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2123 /* look it up */ 2124 stcb = sctp_findassociation_ep_addr(inp_p, 2125 (struct sockaddr *)&sin6, netp, dst, NULL); 2126 if (stcb != NULL) { 2127 return (stcb); 2128 } 2129 } 2130 #endif 2131 offset += SCTP_SIZE32(plen); 2132 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2133 sizeof(param_buf)); 2134 } 2135 return (NULL); 2136 } 2137 2138 static struct sctp_tcb * 2139 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2140 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2141 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2142 { 2143 /* 2144 * Use my vtag to hash. If we find it we then verify the source addr 2145 * is in the assoc. If all goes well we save a bit on rec of a 2146 * packet. 2147 */ 2148 struct sctpasochead *head; 2149 struct sctp_nets *net; 2150 struct sctp_tcb *stcb; 2151 2152 SCTP_INP_INFO_RLOCK(); 2153 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2154 SCTP_BASE_INFO(hashasocmark))]; 2155 LIST_FOREACH(stcb, head, sctp_asocs) { 2156 SCTP_INP_RLOCK(stcb->sctp_ep); 2157 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2158 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2159 continue; 2160 } 2161 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2162 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2163 continue; 2164 } 2165 SCTP_TCB_LOCK(stcb); 2166 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2167 if (stcb->asoc.my_vtag == vtag) { 2168 /* candidate */ 2169 if (stcb->rport != rport) { 2170 SCTP_TCB_UNLOCK(stcb); 2171 continue; 2172 } 2173 if (stcb->sctp_ep->sctp_lport != lport) { 2174 SCTP_TCB_UNLOCK(stcb); 2175 continue; 2176 } 2177 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2178 SCTP_TCB_UNLOCK(stcb); 2179 continue; 2180 } 2181 /* RRS:Need toaddr check here */ 2182 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2183 /* Endpoint does not own this address */ 2184 SCTP_TCB_UNLOCK(stcb); 2185 continue; 2186 } 2187 if (remote_tag) { 2188 /* 2189 * If we have both vtags that's all we match 2190 * on 2191 */ 2192 if (stcb->asoc.peer_vtag == remote_tag) { 2193 /* 2194 * If both tags match we consider it 2195 * conclusive and check NO 2196 * source/destination addresses 2197 */ 2198 goto conclusive; 2199 } 2200 } 2201 if (skip_src_check) { 2202 conclusive: 2203 if (from) { 2204 *netp = sctp_findnet(stcb, from); 2205 } else { 2206 *netp = NULL; /* unknown */ 2207 } 2208 if (inp_p) 2209 *inp_p = stcb->sctp_ep; 2210 SCTP_INP_INFO_RUNLOCK(); 2211 return (stcb); 2212 } 2213 net = sctp_findnet(stcb, from); 2214 if (net) { 2215 /* yep its him. */ 2216 *netp = net; 2217 SCTP_STAT_INCR(sctps_vtagexpress); 2218 *inp_p = stcb->sctp_ep; 2219 SCTP_INP_INFO_RUNLOCK(); 2220 return (stcb); 2221 } else { 2222 /* 2223 * not him, this should only happen in rare 2224 * cases so I peg it. 2225 */ 2226 SCTP_STAT_INCR(sctps_vtagbogus); 2227 } 2228 } 2229 SCTP_TCB_UNLOCK(stcb); 2230 } 2231 SCTP_INP_INFO_RUNLOCK(); 2232 return (NULL); 2233 } 2234 2235 2236 /* 2237 * Find an association with the pointer to the inbound IP packet. This can be 2238 * a IPv4 or IPv6 packet. 2239 */ 2240 struct sctp_tcb * 2241 sctp_findassociation_addr(struct mbuf *m, int offset, 2242 struct sockaddr *src, struct sockaddr *dst, 2243 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2244 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2245 { 2246 struct sctp_tcb *stcb; 2247 struct sctp_inpcb *inp; 2248 2249 if (sh->v_tag) { 2250 /* we only go down this path if vtag is non-zero */ 2251 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2252 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2253 if (stcb) { 2254 return (stcb); 2255 } 2256 } 2257 2258 if (inp_p) { 2259 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2260 1, vrf_id); 2261 inp = *inp_p; 2262 } else { 2263 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2264 1, vrf_id); 2265 } 2266 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2267 if (stcb == NULL && inp) { 2268 /* Found a EP but not this address */ 2269 if ((ch->chunk_type == SCTP_INITIATION) || 2270 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2271 /*- 2272 * special hook, we do NOT return linp or an 2273 * association that is linked to an existing 2274 * association that is under the TCP pool (i.e. no 2275 * listener exists). The endpoint finding routine 2276 * will always find a listener before examining the 2277 * TCP pool. 2278 */ 2279 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2280 if (inp_p) { 2281 *inp_p = NULL; 2282 } 2283 return (NULL); 2284 } 2285 stcb = sctp_findassociation_special_addr(m, 2286 offset, sh, &inp, netp, dst); 2287 if (inp_p != NULL) { 2288 *inp_p = inp; 2289 } 2290 } 2291 } 2292 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2293 return (stcb); 2294 } 2295 2296 /* 2297 * lookup an association by an ASCONF lookup address. 2298 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2299 */ 2300 struct sctp_tcb * 2301 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2302 struct sockaddr *dst, struct sctphdr *sh, 2303 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2304 { 2305 struct sctp_tcb *stcb; 2306 union sctp_sockstore remote_store; 2307 struct sctp_paramhdr param_buf, *phdr; 2308 int ptype; 2309 int zero_address = 0; 2310 #ifdef INET 2311 struct sockaddr_in *sin; 2312 #endif 2313 #ifdef INET6 2314 struct sockaddr_in6 *sin6; 2315 #endif 2316 2317 memset(&remote_store, 0, sizeof(remote_store)); 2318 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2319 ¶m_buf, sizeof(struct sctp_paramhdr)); 2320 if (phdr == NULL) { 2321 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2322 __func__); 2323 return NULL; 2324 } 2325 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2326 /* get the correlation address */ 2327 switch (ptype) { 2328 #ifdef INET6 2329 case SCTP_IPV6_ADDRESS: 2330 { 2331 /* ipv6 address param */ 2332 struct sctp_ipv6addr_param *p6, p6_buf; 2333 2334 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2335 return NULL; 2336 } 2337 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2338 offset + sizeof(struct sctp_asconf_chunk), 2339 &p6_buf.ph, sizeof(p6_buf)); 2340 if (p6 == NULL) { 2341 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2342 __func__); 2343 return (NULL); 2344 } 2345 sin6 = &remote_store.sin6; 2346 sin6->sin6_family = AF_INET6; 2347 sin6->sin6_len = sizeof(*sin6); 2348 sin6->sin6_port = sh->src_port; 2349 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2350 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2351 zero_address = 1; 2352 break; 2353 } 2354 #endif 2355 #ifdef INET 2356 case SCTP_IPV4_ADDRESS: 2357 { 2358 /* ipv4 address param */ 2359 struct sctp_ipv4addr_param *p4, p4_buf; 2360 2361 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2362 return NULL; 2363 } 2364 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2365 offset + sizeof(struct sctp_asconf_chunk), 2366 &p4_buf.ph, sizeof(p4_buf)); 2367 if (p4 == NULL) { 2368 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2369 __func__); 2370 return (NULL); 2371 } 2372 sin = &remote_store.sin; 2373 sin->sin_family = AF_INET; 2374 sin->sin_len = sizeof(*sin); 2375 sin->sin_port = sh->src_port; 2376 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2377 if (sin->sin_addr.s_addr == INADDR_ANY) 2378 zero_address = 1; 2379 break; 2380 } 2381 #endif 2382 default: 2383 /* invalid address param type */ 2384 return NULL; 2385 } 2386 2387 if (zero_address) { 2388 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2389 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2390 if (stcb != NULL) { 2391 SCTP_INP_DECR_REF(*inp_p); 2392 } 2393 } else { 2394 stcb = sctp_findassociation_ep_addr(inp_p, 2395 &remote_store.sa, netp, 2396 dst, NULL); 2397 } 2398 return (stcb); 2399 } 2400 2401 2402 /* 2403 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2404 * addresses. This way if we don't get a bind we by default pick a ephemeral 2405 * port with all addresses bound. 2406 */ 2407 int 2408 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2409 { 2410 /* 2411 * we get called when a new endpoint starts up. We need to allocate 2412 * the sctp_inpcb structure from the zone and init it. Mark it as 2413 * unbound and find a port that we can use as an ephemeral with 2414 * INADDR_ANY. If the user binds later no problem we can then add in 2415 * the specific addresses. And setup the default parameters for the 2416 * EP. 2417 */ 2418 int i, error; 2419 struct sctp_inpcb *inp; 2420 struct sctp_pcb *m; 2421 struct timeval time; 2422 sctp_sharedkey_t *null_key; 2423 2424 error = 0; 2425 2426 SCTP_INP_INFO_WLOCK(); 2427 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2428 if (inp == NULL) { 2429 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2430 SCTP_INP_INFO_WUNLOCK(); 2431 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2432 return (ENOBUFS); 2433 } 2434 /* zap it */ 2435 memset(inp, 0, sizeof(*inp)); 2436 2437 /* bump generations */ 2438 /* setup socket pointers */ 2439 inp->sctp_socket = so; 2440 inp->ip_inp.inp.inp_socket = so; 2441 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2442 #ifdef INET6 2443 if (INP_SOCKAF(so) == AF_INET6) { 2444 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2445 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2446 } 2447 if (MODULE_GLOBAL(ip6_v6only)) { 2448 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2449 } 2450 } 2451 #endif 2452 inp->sctp_associd_counter = 1; 2453 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2454 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2455 inp->max_cwnd = 0; 2456 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2457 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2458 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2459 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2460 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2461 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2462 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2463 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2464 inp->idata_supported = 0; 2465 2466 inp->fibnum = so->so_fibnum; 2467 /* init the small hash table we use to track asocid <-> tcb */ 2468 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2469 if (inp->sctp_asocidhash == NULL) { 2470 crfree(inp->ip_inp.inp.inp_cred); 2471 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2472 SCTP_INP_INFO_WUNLOCK(); 2473 return (ENOBUFS); 2474 } 2475 SCTP_INCR_EP_COUNT(); 2476 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2477 SCTP_INP_INFO_WUNLOCK(); 2478 2479 so->so_pcb = (caddr_t)inp; 2480 2481 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2482 /* UDP style socket */ 2483 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2484 SCTP_PCB_FLAGS_UNBOUND); 2485 /* Be sure it is NON-BLOCKING IO for UDP */ 2486 /* SCTP_SET_SO_NBIO(so); */ 2487 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2488 /* TCP style socket */ 2489 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2490 SCTP_PCB_FLAGS_UNBOUND); 2491 /* Be sure we have blocking IO by default */ 2492 SOCK_LOCK(so); 2493 SCTP_CLEAR_SO_NBIO(so); 2494 SOCK_UNLOCK(so); 2495 } else { 2496 /* 2497 * unsupported socket type (RAW, etc)- in case we missed it 2498 * in protosw 2499 */ 2500 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2501 so->so_pcb = NULL; 2502 crfree(inp->ip_inp.inp.inp_cred); 2503 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2504 return (EOPNOTSUPP); 2505 } 2506 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2507 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2508 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2509 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2510 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2511 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2512 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2513 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2514 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2515 } 2516 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2517 &inp->sctp_hashmark); 2518 if (inp->sctp_tcbhash == NULL) { 2519 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2520 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2521 so->so_pcb = NULL; 2522 crfree(inp->ip_inp.inp.inp_cred); 2523 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2524 return (ENOBUFS); 2525 } 2526 inp->def_vrf_id = vrf_id; 2527 2528 SCTP_INP_INFO_WLOCK(); 2529 SCTP_INP_LOCK_INIT(inp); 2530 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2531 SCTP_INP_READ_INIT(inp); 2532 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2533 /* lock the new ep */ 2534 SCTP_INP_WLOCK(inp); 2535 2536 /* add it to the info area */ 2537 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2538 SCTP_INP_INFO_WUNLOCK(); 2539 2540 TAILQ_INIT(&inp->read_queue); 2541 LIST_INIT(&inp->sctp_addr_list); 2542 2543 LIST_INIT(&inp->sctp_asoc_list); 2544 2545 #ifdef SCTP_TRACK_FREED_ASOCS 2546 /* TEMP CODE */ 2547 LIST_INIT(&inp->sctp_asoc_free_list); 2548 #endif 2549 /* Init the timer structure for signature change */ 2550 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2551 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2552 2553 /* now init the actual endpoint default data */ 2554 m = &inp->sctp_ep; 2555 2556 /* setup the base timeout information */ 2557 m->sctp_timeoutticks[SCTP_TIMER_SEND] = sctp_secs_to_ticks(SCTP_SEND_SEC); /* needed ? */ 2558 m->sctp_timeoutticks[SCTP_TIMER_INIT] = sctp_secs_to_ticks(SCTP_INIT_SEC); /* needed ? */ 2559 m->sctp_timeoutticks[SCTP_TIMER_RECV] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2560 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2561 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2562 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2563 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = sctp_secs_to_ticks(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2564 /* all max/min max are in ms */ 2565 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2566 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2567 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2568 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2569 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2570 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2571 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2572 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2573 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2574 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2575 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2576 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2577 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2578 2579 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2580 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2581 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2582 /* number of streams to pre-open on a association */ 2583 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2584 2585 m->default_mtu = 0; 2586 /* Add adaptation cookie */ 2587 m->adaptation_layer_indicator = 0; 2588 m->adaptation_layer_indicator_provided = 0; 2589 2590 /* seed random number generator */ 2591 m->random_counter = 1; 2592 m->store_at = SCTP_SIGNATURE_SIZE; 2593 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2594 sctp_fill_random_store(m); 2595 2596 /* Minimum cookie size */ 2597 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2598 sizeof(struct sctp_state_cookie); 2599 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2600 2601 /* Setup the initial secret */ 2602 (void)SCTP_GETTIME_TIMEVAL(&time); 2603 m->time_of_secret_change = time.tv_sec; 2604 2605 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2606 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2607 } 2608 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2609 2610 /* How long is a cookie good for ? */ 2611 m->def_cookie_life = sctp_msecs_to_ticks(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2612 /* 2613 * Initialize authentication parameters 2614 */ 2615 m->local_hmacs = sctp_default_supported_hmaclist(); 2616 m->local_auth_chunks = sctp_alloc_chunklist(); 2617 if (inp->asconf_supported) { 2618 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2619 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2620 } 2621 m->default_dscp = 0; 2622 #ifdef INET6 2623 m->default_flowlabel = 0; 2624 #endif 2625 m->port = 0; /* encapsulation disabled by default */ 2626 LIST_INIT(&m->shared_keys); 2627 /* add default NULL key as key id 0 */ 2628 null_key = sctp_alloc_sharedkey(); 2629 sctp_insert_sharedkey(&m->shared_keys, null_key); 2630 SCTP_INP_WUNLOCK(inp); 2631 #ifdef SCTP_LOG_CLOSING 2632 sctp_log_closing(inp, NULL, 12); 2633 #endif 2634 return (error); 2635 } 2636 2637 2638 void 2639 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2640 struct sctp_tcb *stcb) 2641 { 2642 struct sctp_nets *net; 2643 uint16_t lport, rport; 2644 struct sctppcbhead *head; 2645 struct sctp_laddr *laddr, *oladdr; 2646 2647 atomic_add_int(&stcb->asoc.refcnt, 1); 2648 SCTP_TCB_UNLOCK(stcb); 2649 SCTP_INP_INFO_WLOCK(); 2650 SCTP_INP_WLOCK(old_inp); 2651 SCTP_INP_WLOCK(new_inp); 2652 SCTP_TCB_LOCK(stcb); 2653 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2654 2655 new_inp->sctp_ep.time_of_secret_change = 2656 old_inp->sctp_ep.time_of_secret_change; 2657 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2658 sizeof(old_inp->sctp_ep.secret_key)); 2659 new_inp->sctp_ep.current_secret_number = 2660 old_inp->sctp_ep.current_secret_number; 2661 new_inp->sctp_ep.last_secret_number = 2662 old_inp->sctp_ep.last_secret_number; 2663 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2664 2665 /* make it so new data pours into the new socket */ 2666 stcb->sctp_socket = new_inp->sctp_socket; 2667 stcb->sctp_ep = new_inp; 2668 2669 /* Copy the port across */ 2670 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2671 rport = stcb->rport; 2672 /* Pull the tcb from the old association */ 2673 LIST_REMOVE(stcb, sctp_tcbhash); 2674 LIST_REMOVE(stcb, sctp_tcblist); 2675 if (stcb->asoc.in_asocid_hash) { 2676 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2677 } 2678 /* Now insert the new_inp into the TCP connected hash */ 2679 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2680 2681 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2682 /* Its safe to access */ 2683 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2684 2685 /* Now move the tcb into the endpoint list */ 2686 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2687 /* 2688 * Question, do we even need to worry about the ep-hash since we 2689 * only have one connection? Probably not :> so lets get rid of it 2690 * and not suck up any kernel memory in that. 2691 */ 2692 if (stcb->asoc.in_asocid_hash) { 2693 struct sctpasochead *lhd; 2694 2695 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2696 new_inp->hashasocidmark)]; 2697 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2698 } 2699 /* Ok. Let's restart timer. */ 2700 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2701 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2702 stcb, net); 2703 } 2704 2705 SCTP_INP_INFO_WUNLOCK(); 2706 if (new_inp->sctp_tcbhash != NULL) { 2707 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2708 new_inp->sctp_tcbhash = NULL; 2709 } 2710 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2711 /* Subset bound, so copy in the laddr list from the old_inp */ 2712 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2713 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2714 if (laddr == NULL) { 2715 /* 2716 * Gak, what can we do? This assoc is really 2717 * HOSED. We probably should send an abort 2718 * here. 2719 */ 2720 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2721 continue; 2722 } 2723 SCTP_INCR_LADDR_COUNT(); 2724 memset(laddr, 0, sizeof(*laddr)); 2725 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2726 laddr->ifa = oladdr->ifa; 2727 atomic_add_int(&laddr->ifa->refcount, 1); 2728 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2729 sctp_nxt_addr); 2730 new_inp->laddr_count++; 2731 if (oladdr == stcb->asoc.last_used_address) { 2732 stcb->asoc.last_used_address = laddr; 2733 } 2734 } 2735 } 2736 /* 2737 * Now any running timers need to be adjusted since we really don't 2738 * care if they are running or not just blast in the new_inp into 2739 * all of them. 2740 */ 2741 2742 stcb->asoc.dack_timer.ep = (void *)new_inp; 2743 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2744 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2745 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2746 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2747 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2748 /* now what about the nets? */ 2749 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2750 net->pmtu_timer.ep = (void *)new_inp; 2751 net->hb_timer.ep = (void *)new_inp; 2752 net->rxt_timer.ep = (void *)new_inp; 2753 } 2754 SCTP_INP_WUNLOCK(new_inp); 2755 SCTP_INP_WUNLOCK(old_inp); 2756 } 2757 2758 /* 2759 * insert an laddr entry with the given ifa for the desired list 2760 */ 2761 static int 2762 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2763 { 2764 struct sctp_laddr *laddr; 2765 2766 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2767 if (laddr == NULL) { 2768 /* out of memory? */ 2769 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2770 return (EINVAL); 2771 } 2772 SCTP_INCR_LADDR_COUNT(); 2773 memset(laddr, 0, sizeof(*laddr)); 2774 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2775 laddr->ifa = ifa; 2776 laddr->action = act; 2777 atomic_add_int(&ifa->refcount, 1); 2778 /* insert it */ 2779 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2780 2781 return (0); 2782 } 2783 2784 /* 2785 * Remove an laddr entry from the local address list (on an assoc) 2786 */ 2787 static void 2788 sctp_remove_laddr(struct sctp_laddr *laddr) 2789 { 2790 2791 /* remove from the list */ 2792 LIST_REMOVE(laddr, sctp_nxt_addr); 2793 sctp_free_ifa(laddr->ifa); 2794 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2795 SCTP_DECR_LADDR_COUNT(); 2796 } 2797 2798 2799 2800 /* sctp_ifap is used to bypass normal local address validation checks */ 2801 int 2802 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2803 struct sctp_ifa *sctp_ifap, struct thread *p) 2804 { 2805 /* bind a ep to a socket address */ 2806 struct sctppcbhead *head; 2807 struct sctp_inpcb *inp, *inp_tmp; 2808 struct inpcb *ip_inp; 2809 int port_reuse_active = 0; 2810 int bindall; 2811 uint16_t lport; 2812 int error; 2813 uint32_t vrf_id; 2814 2815 lport = 0; 2816 bindall = 1; 2817 inp = (struct sctp_inpcb *)so->so_pcb; 2818 ip_inp = (struct inpcb *)so->so_pcb; 2819 #ifdef SCTP_DEBUG 2820 if (addr) { 2821 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2822 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2823 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2824 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2825 } 2826 #endif 2827 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2828 /* already did a bind, subsequent binds NOT allowed ! */ 2829 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2830 return (EINVAL); 2831 } 2832 #ifdef INVARIANTS 2833 if (p == NULL) 2834 panic("null proc/thread"); 2835 #endif 2836 if (addr != NULL) { 2837 switch (addr->sa_family) { 2838 #ifdef INET 2839 case AF_INET: 2840 { 2841 struct sockaddr_in *sin; 2842 2843 /* IPV6_V6ONLY socket? */ 2844 if (SCTP_IPV6_V6ONLY(inp)) { 2845 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2846 return (EINVAL); 2847 } 2848 if (addr->sa_len != sizeof(*sin)) { 2849 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2850 return (EINVAL); 2851 } 2852 2853 sin = (struct sockaddr_in *)addr; 2854 lport = sin->sin_port; 2855 /* 2856 * For LOOPBACK the prison_local_ip4() call 2857 * will transmute the ip address to the 2858 * proper value. 2859 */ 2860 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2861 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2862 return (error); 2863 } 2864 if (sin->sin_addr.s_addr != INADDR_ANY) { 2865 bindall = 0; 2866 } 2867 break; 2868 } 2869 #endif 2870 #ifdef INET6 2871 case AF_INET6: 2872 { 2873 /* 2874 * Only for pure IPv6 Address. (No IPv4 2875 * Mapped!) 2876 */ 2877 struct sockaddr_in6 *sin6; 2878 2879 sin6 = (struct sockaddr_in6 *)addr; 2880 2881 if (addr->sa_len != sizeof(*sin6)) { 2882 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2883 return (EINVAL); 2884 } 2885 lport = sin6->sin6_port; 2886 /* 2887 * For LOOPBACK the prison_local_ip6() call 2888 * will transmute the ipv6 address to the 2889 * proper value. 2890 */ 2891 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2892 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2893 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2894 return (error); 2895 } 2896 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2897 bindall = 0; 2898 /* KAME hack: embed scopeid */ 2899 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2900 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2901 return (EINVAL); 2902 } 2903 } 2904 /* this must be cleared for ifa_ifwithaddr() */ 2905 sin6->sin6_scope_id = 0; 2906 break; 2907 } 2908 #endif 2909 default: 2910 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2911 return (EAFNOSUPPORT); 2912 } 2913 } 2914 SCTP_INP_INFO_WLOCK(); 2915 SCTP_INP_WLOCK(inp); 2916 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2917 vrf_id = inp->def_vrf_id; 2918 2919 /* increase our count due to the unlock we do */ 2920 SCTP_INP_INCR_REF(inp); 2921 if (lport) { 2922 /* 2923 * Did the caller specify a port? if so we must see if an ep 2924 * already has this one bound. 2925 */ 2926 /* got to be root to get at low ports */ 2927 if (ntohs(lport) < IPPORT_RESERVED) { 2928 if ((p != NULL) && ((error = 2929 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2930 ) != 0)) { 2931 SCTP_INP_DECR_REF(inp); 2932 SCTP_INP_WUNLOCK(inp); 2933 SCTP_INP_INFO_WUNLOCK(); 2934 return (error); 2935 } 2936 } 2937 SCTP_INP_WUNLOCK(inp); 2938 if (bindall) { 2939 vrf_id = inp->def_vrf_id; 2940 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2941 if (inp_tmp != NULL) { 2942 /* 2943 * lock guy returned and lower count note 2944 * that we are not bound so inp_tmp should 2945 * NEVER be inp. And it is this inp 2946 * (inp_tmp) that gets the reference bump, 2947 * so we must lower it. 2948 */ 2949 SCTP_INP_DECR_REF(inp_tmp); 2950 /* unlock info */ 2951 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2952 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2953 /* 2954 * Ok, must be one-2-one and 2955 * allowing port re-use 2956 */ 2957 port_reuse_active = 1; 2958 goto continue_anyway; 2959 } 2960 SCTP_INP_DECR_REF(inp); 2961 SCTP_INP_INFO_WUNLOCK(); 2962 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2963 return (EADDRINUSE); 2964 } 2965 } else { 2966 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2967 if (inp_tmp != NULL) { 2968 /* 2969 * lock guy returned and lower count note 2970 * that we are not bound so inp_tmp should 2971 * NEVER be inp. And it is this inp 2972 * (inp_tmp) that gets the reference bump, 2973 * so we must lower it. 2974 */ 2975 SCTP_INP_DECR_REF(inp_tmp); 2976 /* unlock info */ 2977 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2978 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2979 /* 2980 * Ok, must be one-2-one and 2981 * allowing port re-use 2982 */ 2983 port_reuse_active = 1; 2984 goto continue_anyway; 2985 } 2986 SCTP_INP_DECR_REF(inp); 2987 SCTP_INP_INFO_WUNLOCK(); 2988 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2989 return (EADDRINUSE); 2990 } 2991 } 2992 continue_anyway: 2993 SCTP_INP_WLOCK(inp); 2994 if (bindall) { 2995 /* verify that no lport is not used by a singleton */ 2996 if ((port_reuse_active == 0) && 2997 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2998 /* Sorry someone already has this one bound */ 2999 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3000 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3001 port_reuse_active = 1; 3002 } else { 3003 SCTP_INP_DECR_REF(inp); 3004 SCTP_INP_WUNLOCK(inp); 3005 SCTP_INP_INFO_WUNLOCK(); 3006 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3007 return (EADDRINUSE); 3008 } 3009 } 3010 } 3011 } else { 3012 uint16_t first, last, candidate; 3013 uint16_t count; 3014 int done; 3015 3016 if (ip_inp->inp_flags & INP_HIGHPORT) { 3017 first = MODULE_GLOBAL(ipport_hifirstauto); 3018 last = MODULE_GLOBAL(ipport_hilastauto); 3019 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3020 if (p && (error = 3021 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3022 )) { 3023 SCTP_INP_DECR_REF(inp); 3024 SCTP_INP_WUNLOCK(inp); 3025 SCTP_INP_INFO_WUNLOCK(); 3026 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3027 return (error); 3028 } 3029 first = MODULE_GLOBAL(ipport_lowfirstauto); 3030 last = MODULE_GLOBAL(ipport_lowlastauto); 3031 } else { 3032 first = MODULE_GLOBAL(ipport_firstauto); 3033 last = MODULE_GLOBAL(ipport_lastauto); 3034 } 3035 if (first > last) { 3036 uint16_t temp; 3037 3038 temp = first; 3039 first = last; 3040 last = temp; 3041 } 3042 count = last - first + 1; /* number of candidates */ 3043 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3044 3045 done = 0; 3046 while (!done) { 3047 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3048 done = 1; 3049 } 3050 if (!done) { 3051 if (--count == 0) { 3052 SCTP_INP_DECR_REF(inp); 3053 SCTP_INP_WUNLOCK(inp); 3054 SCTP_INP_INFO_WUNLOCK(); 3055 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3056 return (EADDRINUSE); 3057 } 3058 if (candidate == last) 3059 candidate = first; 3060 else 3061 candidate = candidate + 1; 3062 } 3063 } 3064 lport = htons(candidate); 3065 } 3066 SCTP_INP_DECR_REF(inp); 3067 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3068 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3069 /* 3070 * this really should not happen. The guy did a non-blocking 3071 * bind and then did a close at the same time. 3072 */ 3073 SCTP_INP_WUNLOCK(inp); 3074 SCTP_INP_INFO_WUNLOCK(); 3075 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3076 return (EINVAL); 3077 } 3078 /* ok we look clear to give out this port, so lets setup the binding */ 3079 if (bindall) { 3080 /* binding to all addresses, so just set in the proper flags */ 3081 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3082 /* set the automatic addr changes from kernel flag */ 3083 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3084 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3085 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3086 } else { 3087 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3088 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3089 } 3090 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3091 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3092 } else { 3093 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3094 } 3095 /* 3096 * set the automatic mobility_base from kernel flag (by 3097 * micchie) 3098 */ 3099 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3100 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3101 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3102 } else { 3103 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3105 } 3106 /* 3107 * set the automatic mobility_fasthandoff from kernel flag 3108 * (by micchie) 3109 */ 3110 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3111 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3112 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3113 } else { 3114 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3115 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3116 } 3117 } else { 3118 /* 3119 * bind specific, make sure flags is off and add a new 3120 * address structure to the sctp_addr_list inside the ep 3121 * structure. 3122 * 3123 * We will need to allocate one and insert it at the head. 3124 * The socketopt call can just insert new addresses in there 3125 * as well. It will also have to do the embed scope kame 3126 * hack too (before adding). 3127 */ 3128 struct sctp_ifa *ifa; 3129 union sctp_sockstore store; 3130 3131 memset(&store, 0, sizeof(store)); 3132 switch (addr->sa_family) { 3133 #ifdef INET 3134 case AF_INET: 3135 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3136 store.sin.sin_port = 0; 3137 break; 3138 #endif 3139 #ifdef INET6 3140 case AF_INET6: 3141 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3142 store.sin6.sin6_port = 0; 3143 break; 3144 #endif 3145 default: 3146 break; 3147 } 3148 /* 3149 * first find the interface with the bound address need to 3150 * zero out the port to find the address! yuck! can't do 3151 * this earlier since need port for sctp_pcb_findep() 3152 */ 3153 if (sctp_ifap != NULL) { 3154 ifa = sctp_ifap; 3155 } else { 3156 /* 3157 * Note for BSD we hit here always other O/S's will 3158 * pass things in via the sctp_ifap argument. 3159 */ 3160 ifa = sctp_find_ifa_by_addr(&store.sa, 3161 vrf_id, SCTP_ADDR_NOT_LOCKED); 3162 } 3163 if (ifa == NULL) { 3164 /* Can't find an interface with that address */ 3165 SCTP_INP_WUNLOCK(inp); 3166 SCTP_INP_INFO_WUNLOCK(); 3167 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3168 return (EADDRNOTAVAIL); 3169 } 3170 #ifdef INET6 3171 if (addr->sa_family == AF_INET6) { 3172 /* GAK, more FIXME IFA lock? */ 3173 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3174 /* Can't bind a non-existent addr. */ 3175 SCTP_INP_WUNLOCK(inp); 3176 SCTP_INP_INFO_WUNLOCK(); 3177 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3178 return (EINVAL); 3179 } 3180 } 3181 #endif 3182 /* we're not bound all */ 3183 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3184 /* allow bindx() to send ASCONF's for binding changes */ 3185 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3186 /* clear automatic addr changes from kernel flag */ 3187 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3188 3189 /* add this address to the endpoint list */ 3190 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3191 if (error != 0) { 3192 SCTP_INP_WUNLOCK(inp); 3193 SCTP_INP_INFO_WUNLOCK(); 3194 return (error); 3195 } 3196 inp->laddr_count++; 3197 } 3198 /* find the bucket */ 3199 if (port_reuse_active) { 3200 /* Put it into tcp 1-2-1 hash */ 3201 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3202 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3203 } else { 3204 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3205 } 3206 /* put it in the bucket */ 3207 LIST_INSERT_HEAD(head, inp, sctp_hash); 3208 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3209 (void *)head, ntohs(lport), port_reuse_active); 3210 /* set in the port */ 3211 inp->sctp_lport = lport; 3212 3213 /* turn off just the unbound flag */ 3214 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3215 SCTP_INP_WUNLOCK(inp); 3216 SCTP_INP_INFO_WUNLOCK(); 3217 return (0); 3218 } 3219 3220 3221 static void 3222 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3223 { 3224 struct sctp_iterator *it, *nit; 3225 3226 /* 3227 * We enter with the only the ITERATOR_LOCK in place and a write 3228 * lock on the inp_info stuff. 3229 */ 3230 it = sctp_it_ctl.cur_it; 3231 if (it && (it->vn != curvnet)) { 3232 /* Its not looking at our VNET */ 3233 return; 3234 } 3235 if (it && (it->inp == inp)) { 3236 /* 3237 * This is tricky and we hold the iterator lock, but when it 3238 * returns and gets the lock (when we release it) the 3239 * iterator will try to operate on inp. We need to stop that 3240 * from happening. But of course the iterator has a 3241 * reference on the stcb and inp. We can mark it and it will 3242 * stop. 3243 * 3244 * If its a single iterator situation, we set the end 3245 * iterator flag. Otherwise we set the iterator to go to the 3246 * next inp. 3247 * 3248 */ 3249 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3250 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3251 } else { 3252 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3253 } 3254 } 3255 /* 3256 * Now go through and remove any single reference to our inp that 3257 * may be still pending on the list 3258 */ 3259 SCTP_IPI_ITERATOR_WQ_LOCK(); 3260 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3261 if (it->vn != curvnet) { 3262 continue; 3263 } 3264 if (it->inp == inp) { 3265 /* This one points to me is it inp specific? */ 3266 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3267 /* Remove and free this one */ 3268 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3269 it, sctp_nxt_itr); 3270 if (it->function_atend != NULL) { 3271 (*it->function_atend) (it->pointer, it->val); 3272 } 3273 SCTP_FREE(it, SCTP_M_ITER); 3274 } else { 3275 it->inp = LIST_NEXT(it->inp, sctp_list); 3276 if (it->inp) { 3277 SCTP_INP_INCR_REF(it->inp); 3278 } 3279 } 3280 /* 3281 * When its put in the refcnt is incremented so decr 3282 * it 3283 */ 3284 SCTP_INP_DECR_REF(inp); 3285 } 3286 } 3287 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3288 } 3289 3290 /* release sctp_inpcb unbind the port */ 3291 void 3292 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3293 { 3294 /* 3295 * Here we free a endpoint. We must find it (if it is in the Hash 3296 * table) and remove it from there. Then we must also find it in the 3297 * overall list and remove it from there. After all removals are 3298 * complete then any timer has to be stopped. Then start the actual 3299 * freeing. a) Any local lists. b) Any associations. c) The hash of 3300 * all associations. d) finally the ep itself. 3301 */ 3302 struct sctp_tcb *asoc, *nasoc; 3303 struct sctp_laddr *laddr, *nladdr; 3304 struct inpcb *ip_pcb; 3305 struct socket *so; 3306 int being_refed = 0; 3307 struct sctp_queued_to_read *sq, *nsq; 3308 int cnt; 3309 sctp_sharedkey_t *shared_key, *nshared_key; 3310 3311 3312 #ifdef SCTP_LOG_CLOSING 3313 sctp_log_closing(inp, NULL, 0); 3314 #endif 3315 SCTP_ITERATOR_LOCK(); 3316 /* mark any iterators on the list or being processed */ 3317 sctp_iterator_inp_being_freed(inp); 3318 SCTP_ITERATOR_UNLOCK(); 3319 so = inp->sctp_socket; 3320 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3321 /* been here before.. eeks.. get out of here */ 3322 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3323 #ifdef SCTP_LOG_CLOSING 3324 sctp_log_closing(inp, NULL, 1); 3325 #endif 3326 return; 3327 } 3328 SCTP_ASOC_CREATE_LOCK(inp); 3329 SCTP_INP_INFO_WLOCK(); 3330 3331 SCTP_INP_WLOCK(inp); 3332 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3333 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3334 /* socket is gone, so no more wakeups allowed */ 3335 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3336 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3337 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3338 3339 } 3340 /* First time through we have the socket lock, after that no more. */ 3341 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3342 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3343 3344 if (inp->control) { 3345 sctp_m_freem(inp->control); 3346 inp->control = NULL; 3347 } 3348 if (inp->pkt) { 3349 sctp_m_freem(inp->pkt); 3350 inp->pkt = NULL; 3351 } 3352 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3353 * here but I will be nice :> (i.e. 3354 * ip_pcb = ep;) */ 3355 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3356 int cnt_in_sd; 3357 3358 cnt_in_sd = 0; 3359 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3360 SCTP_TCB_LOCK(asoc); 3361 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3362 /* Skip guys being freed */ 3363 cnt_in_sd++; 3364 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3365 /* 3366 * Special case - we did not start a 3367 * kill timer on the asoc due to it 3368 * was not closed. So go ahead and 3369 * start it now. 3370 */ 3371 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3372 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3373 } 3374 SCTP_TCB_UNLOCK(asoc); 3375 continue; 3376 } 3377 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3378 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3379 (asoc->asoc.total_output_queue_size == 0)) { 3380 /* 3381 * If we have data in queue, we don't want 3382 * to just free since the app may have done, 3383 * send()/close or connect/send/close. And 3384 * it wants the data to get across first. 3385 */ 3386 /* Just abandon things in the front states */ 3387 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3388 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3389 cnt_in_sd++; 3390 } 3391 continue; 3392 } 3393 /* Disconnect the socket please */ 3394 asoc->sctp_socket = NULL; 3395 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3396 if ((asoc->asoc.size_on_reasm_queue > 0) || 3397 (asoc->asoc.control_pdapi) || 3398 (asoc->asoc.size_on_all_streams > 0) || 3399 (so && (so->so_rcv.sb_cc > 0))) { 3400 /* Left with Data unread */ 3401 struct mbuf *op_err; 3402 3403 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3404 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3405 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3406 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3407 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3408 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3409 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3410 } 3411 if (sctp_free_assoc(inp, asoc, 3412 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3413 cnt_in_sd++; 3414 } 3415 continue; 3416 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3417 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3418 (asoc->asoc.stream_queue_cnt == 0)) { 3419 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3420 goto abort_anyway; 3421 } 3422 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3423 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3424 struct sctp_nets *netp; 3425 3426 /* 3427 * there is nothing queued to send, 3428 * so I send shutdown 3429 */ 3430 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3431 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3432 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3433 } 3434 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3435 sctp_stop_timers_for_shutdown(asoc); 3436 if (asoc->asoc.alternate) { 3437 netp = asoc->asoc.alternate; 3438 } else { 3439 netp = asoc->asoc.primary_destination; 3440 } 3441 sctp_send_shutdown(asoc, netp); 3442 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3443 netp); 3444 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3445 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3446 } 3447 } else { 3448 /* mark into shutdown pending */ 3449 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3450 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3451 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3452 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3453 } 3454 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3455 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3456 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3457 struct mbuf *op_err; 3458 3459 abort_anyway: 3460 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3461 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3462 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3463 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3464 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3465 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3466 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3467 } 3468 if (sctp_free_assoc(inp, asoc, 3469 SCTP_PCBFREE_NOFORCE, 3470 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3471 cnt_in_sd++; 3472 } 3473 continue; 3474 } else { 3475 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3476 } 3477 } 3478 cnt_in_sd++; 3479 SCTP_TCB_UNLOCK(asoc); 3480 } 3481 /* now is there some left in our SHUTDOWN state? */ 3482 if (cnt_in_sd) { 3483 #ifdef SCTP_LOG_CLOSING 3484 sctp_log_closing(inp, NULL, 2); 3485 #endif 3486 inp->sctp_socket = NULL; 3487 SCTP_INP_WUNLOCK(inp); 3488 SCTP_ASOC_CREATE_UNLOCK(inp); 3489 SCTP_INP_INFO_WUNLOCK(); 3490 return; 3491 } 3492 } 3493 inp->sctp_socket = NULL; 3494 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3495 SCTP_PCB_FLAGS_UNBOUND) { 3496 /* 3497 * ok, this guy has been bound. It's port is somewhere in 3498 * the SCTP_BASE_INFO(hash table). Remove it! 3499 */ 3500 LIST_REMOVE(inp, sctp_hash); 3501 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3502 } 3503 3504 /* 3505 * If there is a timer running to kill us, forget it, since it may 3506 * have a contest on the INP lock.. which would cause us to die ... 3507 */ 3508 cnt = 0; 3509 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3510 SCTP_TCB_LOCK(asoc); 3511 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3512 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3513 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3514 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3515 } 3516 cnt++; 3517 SCTP_TCB_UNLOCK(asoc); 3518 continue; 3519 } 3520 /* Free associations that are NOT killing us */ 3521 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3522 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3523 struct mbuf *op_err; 3524 3525 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3526 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3527 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3528 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3529 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3530 cnt++; 3531 SCTP_TCB_UNLOCK(asoc); 3532 continue; 3533 } 3534 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3535 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3536 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3537 } 3538 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3539 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3540 cnt++; 3541 } 3542 } 3543 if (cnt) { 3544 /* Ok we have someone out there that will kill us */ 3545 #ifdef SCTP_LOG_CLOSING 3546 sctp_log_closing(inp, NULL, 3); 3547 #endif 3548 SCTP_INP_WUNLOCK(inp); 3549 SCTP_ASOC_CREATE_UNLOCK(inp); 3550 SCTP_INP_INFO_WUNLOCK(); 3551 return; 3552 } 3553 if (SCTP_INP_LOCK_CONTENDED(inp)) 3554 being_refed++; 3555 if (SCTP_INP_READ_CONTENDED(inp)) 3556 being_refed++; 3557 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3558 being_refed++; 3559 3560 if ((inp->refcount) || 3561 (being_refed) || 3562 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3563 #ifdef SCTP_LOG_CLOSING 3564 sctp_log_closing(inp, NULL, 4); 3565 #endif 3566 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3567 SCTP_INP_WUNLOCK(inp); 3568 SCTP_ASOC_CREATE_UNLOCK(inp); 3569 SCTP_INP_INFO_WUNLOCK(); 3570 return; 3571 } 3572 inp->sctp_ep.signature_change.type = 0; 3573 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3574 /* 3575 * Remove it from the list .. last thing we need a lock for. 3576 */ 3577 LIST_REMOVE(inp, sctp_list); 3578 SCTP_INP_WUNLOCK(inp); 3579 SCTP_ASOC_CREATE_UNLOCK(inp); 3580 SCTP_INP_INFO_WUNLOCK(); 3581 /* 3582 * Now we release all locks. Since this INP cannot be found anymore 3583 * except possibly by the kill timer that might be running. We call 3584 * the drain function here. It should hit the case were it sees the 3585 * ACTIVE flag cleared and exit out freeing us to proceed and 3586 * destroy everything. 3587 */ 3588 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3589 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3590 } else { 3591 /* Probably un-needed */ 3592 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3593 } 3594 3595 #ifdef SCTP_LOG_CLOSING 3596 sctp_log_closing(inp, NULL, 5); 3597 #endif 3598 3599 3600 if ((inp->sctp_asocidhash) != NULL) { 3601 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3602 inp->sctp_asocidhash = NULL; 3603 } 3604 /* sa_ignore FREED_MEMORY */ 3605 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3606 /* Its only abandoned if it had data left */ 3607 if (sq->length) 3608 SCTP_STAT_INCR(sctps_left_abandon); 3609 3610 TAILQ_REMOVE(&inp->read_queue, sq, next); 3611 sctp_free_remote_addr(sq->whoFrom); 3612 if (so) 3613 so->so_rcv.sb_cc -= sq->length; 3614 if (sq->data) { 3615 sctp_m_freem(sq->data); 3616 sq->data = NULL; 3617 } 3618 /* 3619 * no need to free the net count, since at this point all 3620 * assoc's are gone. 3621 */ 3622 sctp_free_a_readq(NULL, sq); 3623 } 3624 /* Now the sctp_pcb things */ 3625 /* 3626 * free each asoc if it is not already closed/free. we can't use the 3627 * macro here since le_next will get freed as part of the 3628 * sctp_free_assoc() call. 3629 */ 3630 if (ip_pcb->inp_options) { 3631 (void)sctp_m_free(ip_pcb->inp_options); 3632 ip_pcb->inp_options = 0; 3633 } 3634 3635 3636 #ifdef INET6 3637 if (ip_pcb->inp_vflag & INP_IPV6) { 3638 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3639 } 3640 #endif /* INET6 */ 3641 ip_pcb->inp_vflag = 0; 3642 /* free up authentication fields */ 3643 if (inp->sctp_ep.local_auth_chunks != NULL) 3644 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3645 if (inp->sctp_ep.local_hmacs != NULL) 3646 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3647 3648 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3649 LIST_REMOVE(shared_key, next); 3650 sctp_free_sharedkey(shared_key); 3651 /* sa_ignore FREED_MEMORY */ 3652 } 3653 3654 /* 3655 * if we have an address list the following will free the list of 3656 * ifaddr's that are set into this ep. Again macro limitations here, 3657 * since the LIST_FOREACH could be a bad idea. 3658 */ 3659 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3660 sctp_remove_laddr(laddr); 3661 } 3662 3663 #ifdef SCTP_TRACK_FREED_ASOCS 3664 /* TEMP CODE */ 3665 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3666 LIST_REMOVE(asoc, sctp_tcblist); 3667 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3668 SCTP_DECR_ASOC_COUNT(); 3669 } 3670 /* *** END TEMP CODE *** */ 3671 #endif 3672 /* Now lets see about freeing the EP hash table. */ 3673 if (inp->sctp_tcbhash != NULL) { 3674 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3675 inp->sctp_tcbhash = NULL; 3676 } 3677 /* Now we must put the ep memory back into the zone pool */ 3678 crfree(inp->ip_inp.inp.inp_cred); 3679 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3680 SCTP_INP_LOCK_DESTROY(inp); 3681 SCTP_INP_READ_DESTROY(inp); 3682 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3683 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3684 SCTP_DECR_EP_COUNT(); 3685 } 3686 3687 3688 struct sctp_nets * 3689 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3690 { 3691 struct sctp_nets *net; 3692 3693 /* locate the address */ 3694 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3695 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3696 return (net); 3697 } 3698 return (NULL); 3699 } 3700 3701 3702 int 3703 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3704 { 3705 struct sctp_ifa *sctp_ifa; 3706 3707 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3708 if (sctp_ifa) { 3709 return (1); 3710 } else { 3711 return (0); 3712 } 3713 } 3714 3715 /* 3716 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3717 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3718 * stats of stuff. 3719 */ 3720 int 3721 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3722 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3723 { 3724 /* 3725 * The following is redundant to the same lines in the 3726 * sctp_aloc_assoc() but is needed since others call the add address 3727 * function 3728 */ 3729 struct sctp_nets *net, *netfirst; 3730 int addr_inscope; 3731 3732 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3733 from); 3734 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3735 3736 netfirst = sctp_findnet(stcb, newaddr); 3737 if (netfirst) { 3738 /* 3739 * Lie and return ok, we don't want to make the association 3740 * go away for this behavior. It will happen in the TCP 3741 * model in a connected socket. It does not reach the hash 3742 * table until after the association is built so it can't be 3743 * found. Mark as reachable, since the initial creation will 3744 * have been cleared and the NOT_IN_ASSOC flag will have 3745 * been added... and we don't want to end up removing it 3746 * back out. 3747 */ 3748 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3749 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3750 SCTP_ADDR_UNCONFIRMED); 3751 } else { 3752 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3753 } 3754 3755 return (0); 3756 } 3757 addr_inscope = 1; 3758 switch (newaddr->sa_family) { 3759 #ifdef INET 3760 case AF_INET: 3761 { 3762 struct sockaddr_in *sin; 3763 3764 sin = (struct sockaddr_in *)newaddr; 3765 if (sin->sin_addr.s_addr == 0) { 3766 /* Invalid address */ 3767 return (-1); 3768 } 3769 /* zero out the zero area */ 3770 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3771 3772 /* assure len is set */ 3773 sin->sin_len = sizeof(struct sockaddr_in); 3774 if (set_scope) { 3775 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3776 stcb->asoc.scope.ipv4_local_scope = 1; 3777 } 3778 } else { 3779 /* Validate the address is in scope */ 3780 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3781 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3782 addr_inscope = 0; 3783 } 3784 } 3785 break; 3786 } 3787 #endif 3788 #ifdef INET6 3789 case AF_INET6: 3790 { 3791 struct sockaddr_in6 *sin6; 3792 3793 sin6 = (struct sockaddr_in6 *)newaddr; 3794 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3795 /* Invalid address */ 3796 return (-1); 3797 } 3798 /* assure len is set */ 3799 sin6->sin6_len = sizeof(struct sockaddr_in6); 3800 if (set_scope) { 3801 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3802 stcb->asoc.scope.loopback_scope = 1; 3803 stcb->asoc.scope.local_scope = 0; 3804 stcb->asoc.scope.ipv4_local_scope = 1; 3805 stcb->asoc.scope.site_scope = 1; 3806 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3807 /* 3808 * If the new destination is a 3809 * LINK_LOCAL we must have common 3810 * site scope. Don't set the local 3811 * scope since we may not share all 3812 * links, only loopback can do this. 3813 * Links on the local network would 3814 * also be on our private network 3815 * for v4 too. 3816 */ 3817 stcb->asoc.scope.ipv4_local_scope = 1; 3818 stcb->asoc.scope.site_scope = 1; 3819 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3820 /* 3821 * If the new destination is 3822 * SITE_LOCAL then we must have site 3823 * scope in common. 3824 */ 3825 stcb->asoc.scope.site_scope = 1; 3826 } 3827 } else { 3828 /* Validate the address is in scope */ 3829 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3830 (stcb->asoc.scope.loopback_scope == 0)) { 3831 addr_inscope = 0; 3832 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3833 (stcb->asoc.scope.local_scope == 0)) { 3834 addr_inscope = 0; 3835 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3836 (stcb->asoc.scope.site_scope == 0)) { 3837 addr_inscope = 0; 3838 } 3839 } 3840 break; 3841 } 3842 #endif 3843 default: 3844 /* not supported family type */ 3845 return (-1); 3846 } 3847 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3848 if (net == NULL) { 3849 return (-1); 3850 } 3851 SCTP_INCR_RADDR_COUNT(); 3852 memset(net, 0, sizeof(struct sctp_nets)); 3853 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3854 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3855 switch (newaddr->sa_family) { 3856 #ifdef INET 3857 case AF_INET: 3858 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3859 break; 3860 #endif 3861 #ifdef INET6 3862 case AF_INET6: 3863 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3864 break; 3865 #endif 3866 default: 3867 break; 3868 } 3869 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3870 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3871 stcb->asoc.scope.loopback_scope = 1; 3872 stcb->asoc.scope.ipv4_local_scope = 1; 3873 stcb->asoc.scope.local_scope = 0; 3874 stcb->asoc.scope.site_scope = 1; 3875 addr_inscope = 1; 3876 } 3877 net->failure_threshold = stcb->asoc.def_net_failure; 3878 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3879 if (addr_inscope == 0) { 3880 net->dest_state = (SCTP_ADDR_REACHABLE | 3881 SCTP_ADDR_OUT_OF_SCOPE); 3882 } else { 3883 if (from == SCTP_ADDR_IS_CONFIRMED) 3884 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3885 net->dest_state = SCTP_ADDR_REACHABLE; 3886 else 3887 net->dest_state = SCTP_ADDR_REACHABLE | 3888 SCTP_ADDR_UNCONFIRMED; 3889 } 3890 /* 3891 * We set this to 0, the timer code knows that this means its an 3892 * initial value 3893 */ 3894 net->rto_needed = 1; 3895 net->RTO = 0; 3896 net->RTO_measured = 0; 3897 stcb->asoc.numnets++; 3898 net->ref_count = 1; 3899 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3900 net->port = port; 3901 net->dscp = stcb->asoc.default_dscp; 3902 #ifdef INET6 3903 net->flowlabel = stcb->asoc.default_flowlabel; 3904 #endif 3905 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3906 net->dest_state |= SCTP_ADDR_NOHB; 3907 } else { 3908 net->dest_state &= ~SCTP_ADDR_NOHB; 3909 } 3910 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3911 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3912 } else { 3913 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3914 } 3915 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3916 /* Init the timer structure */ 3917 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3918 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3919 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3920 3921 /* Now generate a route for this guy */ 3922 #ifdef INET6 3923 /* KAME hack: embed scopeid */ 3924 if (newaddr->sa_family == AF_INET6) { 3925 struct sockaddr_in6 *sin6; 3926 3927 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3928 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3929 sin6->sin6_scope_id = 0; 3930 } 3931 #endif 3932 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3933 stcb->asoc.vrf_id, 3934 stcb->sctp_ep->fibnum); 3935 3936 net->src_addr_selected = 0; 3937 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3938 /* Get source address */ 3939 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3940 stcb, 3941 (sctp_route_t *)&net->ro, 3942 net, 3943 0, 3944 stcb->asoc.vrf_id); 3945 if (stcb->asoc.default_mtu > 0) { 3946 net->mtu = stcb->asoc.default_mtu; 3947 switch (net->ro._l_addr.sa.sa_family) { 3948 #ifdef INET 3949 case AF_INET: 3950 net->mtu += SCTP_MIN_V4_OVERHEAD; 3951 break; 3952 #endif 3953 #ifdef INET6 3954 case AF_INET6: 3955 net->mtu += SCTP_MIN_OVERHEAD; 3956 break; 3957 #endif 3958 default: 3959 break; 3960 } 3961 #if defined(INET) || defined(INET6) 3962 if (net->port) { 3963 net->mtu += (uint32_t)sizeof(struct udphdr); 3964 } 3965 #endif 3966 } else if (net->ro._s_addr != NULL) { 3967 uint32_t imtu, rmtu, hcmtu; 3968 3969 net->src_addr_selected = 1; 3970 /* Now get the interface MTU */ 3971 if (net->ro._s_addr->ifn_p != NULL) { 3972 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3973 } else { 3974 imtu = 0; 3975 } 3976 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_nh); 3977 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3978 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3979 } 3980 } 3981 if (net->mtu == 0) { 3982 if (stcb->asoc.default_mtu > 0) { 3983 net->mtu = stcb->asoc.default_mtu; 3984 switch (net->ro._l_addr.sa.sa_family) { 3985 #ifdef INET 3986 case AF_INET: 3987 net->mtu += SCTP_MIN_V4_OVERHEAD; 3988 break; 3989 #endif 3990 #ifdef INET6 3991 case AF_INET6: 3992 net->mtu += SCTP_MIN_OVERHEAD; 3993 break; 3994 #endif 3995 default: 3996 break; 3997 } 3998 #if defined(INET) || defined(INET6) 3999 if (net->port) { 4000 net->mtu += (uint32_t)sizeof(struct udphdr); 4001 } 4002 #endif 4003 } else { 4004 switch (newaddr->sa_family) { 4005 #ifdef INET 4006 case AF_INET: 4007 net->mtu = SCTP_DEFAULT_MTU; 4008 break; 4009 #endif 4010 #ifdef INET6 4011 case AF_INET6: 4012 net->mtu = 1280; 4013 break; 4014 #endif 4015 default: 4016 break; 4017 } 4018 } 4019 } 4020 #if defined(INET) || defined(INET6) 4021 if (net->port) { 4022 net->mtu -= (uint32_t)sizeof(struct udphdr); 4023 } 4024 #endif 4025 if (from == SCTP_ALLOC_ASOC) { 4026 stcb->asoc.smallest_mtu = net->mtu; 4027 } 4028 if (stcb->asoc.smallest_mtu > net->mtu) { 4029 sctp_pathmtu_adjustment(stcb, net->mtu); 4030 } 4031 #ifdef INET6 4032 if (newaddr->sa_family == AF_INET6) { 4033 struct sockaddr_in6 *sin6; 4034 4035 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4036 (void)sa6_recoverscope(sin6); 4037 } 4038 #endif 4039 4040 /* JRS - Use the congestion control given in the CC module */ 4041 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4042 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4043 4044 /* 4045 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4046 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4047 */ 4048 net->find_pseudo_cumack = 1; 4049 net->find_rtx_pseudo_cumack = 1; 4050 /* Choose an initial flowid. */ 4051 net->flowid = stcb->asoc.my_vtag ^ 4052 ntohs(stcb->rport) ^ 4053 ntohs(stcb->sctp_ep->sctp_lport); 4054 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4055 if (netp) { 4056 *netp = net; 4057 } 4058 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4059 if (net->ro.ro_nh == NULL) { 4060 /* Since we have no route put it at the back */ 4061 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4062 } else if (netfirst == NULL) { 4063 /* We are the first one in the pool. */ 4064 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4065 } else if (netfirst->ro.ro_nh == NULL) { 4066 /* 4067 * First one has NO route. Place this one ahead of the first 4068 * one. 4069 */ 4070 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4071 } else if (net->ro.ro_nh->nh_ifp != netfirst->ro.ro_nh->nh_ifp) { 4072 /* 4073 * This one has a different interface than the one at the 4074 * top of the list. Place it ahead. 4075 */ 4076 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4077 } else { 4078 /* 4079 * Ok we have the same interface as the first one. Move 4080 * forward until we find either a) one with a NULL route... 4081 * insert ahead of that b) one with a different ifp.. insert 4082 * after that. c) end of the list.. insert at the tail. 4083 */ 4084 struct sctp_nets *netlook; 4085 4086 do { 4087 netlook = TAILQ_NEXT(netfirst, sctp_next); 4088 if (netlook == NULL) { 4089 /* End of the list */ 4090 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4091 break; 4092 } else if (netlook->ro.ro_nh == NULL) { 4093 /* next one has NO route */ 4094 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4095 break; 4096 } else if (netlook->ro.ro_nh->nh_ifp != net->ro.ro_nh->nh_ifp) { 4097 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4098 net, sctp_next); 4099 break; 4100 } 4101 /* Shift forward */ 4102 netfirst = netlook; 4103 } while (netlook != NULL); 4104 } 4105 4106 /* got to have a primary set */ 4107 if (stcb->asoc.primary_destination == 0) { 4108 stcb->asoc.primary_destination = net; 4109 } else if ((stcb->asoc.primary_destination->ro.ro_nh == NULL) && 4110 (net->ro.ro_nh) && 4111 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4112 /* No route to current primary adopt new primary */ 4113 stcb->asoc.primary_destination = net; 4114 } 4115 /* Validate primary is first */ 4116 net = TAILQ_FIRST(&stcb->asoc.nets); 4117 if ((net != stcb->asoc.primary_destination) && 4118 (stcb->asoc.primary_destination)) { 4119 /* 4120 * first one on the list is NOT the primary sctp_cmpaddr() 4121 * is much more efficient if the primary is the first on the 4122 * list, make it so. 4123 */ 4124 TAILQ_REMOVE(&stcb->asoc.nets, 4125 stcb->asoc.primary_destination, sctp_next); 4126 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4127 stcb->asoc.primary_destination, sctp_next); 4128 } 4129 return (0); 4130 } 4131 4132 4133 static uint32_t 4134 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4135 { 4136 uint32_t id; 4137 struct sctpasochead *head; 4138 struct sctp_tcb *lstcb; 4139 4140 try_again: 4141 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4142 /* TSNH */ 4143 return (0); 4144 } 4145 /* 4146 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4147 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4148 */ 4149 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4150 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4151 } 4152 id = inp->sctp_associd_counter; 4153 inp->sctp_associd_counter++; 4154 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4155 if (lstcb) { 4156 goto try_again; 4157 } 4158 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4159 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4160 stcb->asoc.in_asocid_hash = 1; 4161 return (id); 4162 } 4163 4164 /* 4165 * allocate an association and add it to the endpoint. The caller must be 4166 * careful to add all additional addresses once they are know right away or 4167 * else the assoc will be may experience a blackout scenario. 4168 */ 4169 struct sctp_tcb * 4170 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4171 int *error, uint32_t override_tag, uint32_t vrf_id, 4172 uint16_t o_streams, uint16_t port, 4173 struct thread *p, 4174 int initialize_auth_params) 4175 { 4176 /* note the p argument is only valid in unbound sockets */ 4177 4178 struct sctp_tcb *stcb; 4179 struct sctp_association *asoc; 4180 struct sctpasochead *head; 4181 uint16_t rport; 4182 int err; 4183 4184 /* 4185 * Assumption made here: Caller has done a 4186 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4187 * address does not exist already. 4188 */ 4189 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4190 /* Hit max assoc, sorry no more */ 4191 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4192 *error = ENOBUFS; 4193 return (NULL); 4194 } 4195 if (firstaddr == NULL) { 4196 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4197 *error = EINVAL; 4198 return (NULL); 4199 } 4200 SCTP_INP_RLOCK(inp); 4201 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4202 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4203 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4204 /* 4205 * If its in the TCP pool, its NOT allowed to create an 4206 * association. The parent listener needs to call 4207 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4208 * off, or connected one does this.. its an error. 4209 */ 4210 SCTP_INP_RUNLOCK(inp); 4211 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4212 *error = EINVAL; 4213 return (NULL); 4214 } 4215 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4216 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4217 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4218 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4219 SCTP_INP_RUNLOCK(inp); 4220 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4221 *error = EINVAL; 4222 return (NULL); 4223 } 4224 } 4225 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4226 #ifdef SCTP_DEBUG 4227 if (firstaddr) { 4228 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4229 switch (firstaddr->sa_family) { 4230 #ifdef INET 4231 case AF_INET: 4232 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4233 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4234 break; 4235 #endif 4236 #ifdef INET6 4237 case AF_INET6: 4238 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4239 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4240 break; 4241 #endif 4242 default: 4243 break; 4244 } 4245 } else { 4246 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4247 } 4248 #endif /* SCTP_DEBUG */ 4249 switch (firstaddr->sa_family) { 4250 #ifdef INET 4251 case AF_INET: 4252 { 4253 struct sockaddr_in *sin; 4254 4255 sin = (struct sockaddr_in *)firstaddr; 4256 if ((ntohs(sin->sin_port) == 0) || 4257 (sin->sin_addr.s_addr == INADDR_ANY) || 4258 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4259 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4260 /* Invalid address */ 4261 SCTP_INP_RUNLOCK(inp); 4262 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4263 *error = EINVAL; 4264 return (NULL); 4265 } 4266 rport = sin->sin_port; 4267 break; 4268 } 4269 #endif 4270 #ifdef INET6 4271 case AF_INET6: 4272 { 4273 struct sockaddr_in6 *sin6; 4274 4275 sin6 = (struct sockaddr_in6 *)firstaddr; 4276 if ((ntohs(sin6->sin6_port) == 0) || 4277 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4278 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4279 /* Invalid address */ 4280 SCTP_INP_RUNLOCK(inp); 4281 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4282 *error = EINVAL; 4283 return (NULL); 4284 } 4285 rport = sin6->sin6_port; 4286 break; 4287 } 4288 #endif 4289 default: 4290 /* not supported family type */ 4291 SCTP_INP_RUNLOCK(inp); 4292 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4293 *error = EINVAL; 4294 return (NULL); 4295 } 4296 SCTP_INP_RUNLOCK(inp); 4297 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4298 /* 4299 * If you have not performed a bind, then we need to do the 4300 * ephemeral bind for you. 4301 */ 4302 if ((err = sctp_inpcb_bind(inp->sctp_socket, NULL, NULL, p))) { 4303 /* bind error, probably perm */ 4304 *error = err; 4305 return (NULL); 4306 } 4307 } 4308 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4309 if (stcb == NULL) { 4310 /* out of memory? */ 4311 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4312 *error = ENOMEM; 4313 return (NULL); 4314 } 4315 SCTP_INCR_ASOC_COUNT(); 4316 4317 memset(stcb, 0, sizeof(*stcb)); 4318 asoc = &stcb->asoc; 4319 4320 SCTP_TCB_LOCK_INIT(stcb); 4321 SCTP_TCB_SEND_LOCK_INIT(stcb); 4322 stcb->rport = rport; 4323 /* setup back pointer's */ 4324 stcb->sctp_ep = inp; 4325 stcb->sctp_socket = inp->sctp_socket; 4326 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4327 /* failed */ 4328 SCTP_TCB_LOCK_DESTROY(stcb); 4329 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4330 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4331 SCTP_DECR_ASOC_COUNT(); 4332 *error = err; 4333 return (NULL); 4334 } 4335 /* and the port */ 4336 SCTP_INP_INFO_WLOCK(); 4337 SCTP_INP_WLOCK(inp); 4338 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4339 /* inpcb freed while alloc going on */ 4340 SCTP_TCB_LOCK_DESTROY(stcb); 4341 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4342 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4343 SCTP_INP_WUNLOCK(inp); 4344 SCTP_INP_INFO_WUNLOCK(); 4345 SCTP_DECR_ASOC_COUNT(); 4346 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4347 *error = EINVAL; 4348 return (NULL); 4349 } 4350 SCTP_TCB_LOCK(stcb); 4351 4352 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4353 /* now that my_vtag is set, add it to the hash */ 4354 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4355 /* put it in the bucket in the vtag hash of assoc's for the system */ 4356 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4357 SCTP_INP_INFO_WUNLOCK(); 4358 4359 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4360 /* failure.. memory error? */ 4361 if (asoc->strmout) { 4362 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4363 asoc->strmout = NULL; 4364 } 4365 if (asoc->mapping_array) { 4366 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4367 asoc->mapping_array = NULL; 4368 } 4369 if (asoc->nr_mapping_array) { 4370 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4371 asoc->nr_mapping_array = NULL; 4372 } 4373 SCTP_DECR_ASOC_COUNT(); 4374 SCTP_TCB_UNLOCK(stcb); 4375 SCTP_TCB_LOCK_DESTROY(stcb); 4376 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4377 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4378 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4379 SCTP_INP_WUNLOCK(inp); 4380 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4381 *error = ENOBUFS; 4382 return (NULL); 4383 } 4384 /* Init all the timers */ 4385 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4386 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4387 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4388 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4389 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4390 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4391 4392 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4393 /* now file the port under the hash as well */ 4394 if (inp->sctp_tcbhash != NULL) { 4395 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4396 inp->sctp_hashmark)]; 4397 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4398 } 4399 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4400 sctp_initialize_auth_params(inp, stcb); 4401 } 4402 SCTP_INP_WUNLOCK(inp); 4403 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4404 return (stcb); 4405 } 4406 4407 4408 void 4409 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4410 { 4411 struct sctp_inpcb *inp; 4412 struct sctp_association *asoc; 4413 4414 inp = stcb->sctp_ep; 4415 asoc = &stcb->asoc; 4416 asoc->numnets--; 4417 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4418 if (net == asoc->primary_destination) { 4419 /* Reset primary */ 4420 struct sctp_nets *lnet; 4421 4422 lnet = TAILQ_FIRST(&asoc->nets); 4423 /* 4424 * Mobility adaptation Ideally, if deleted destination is 4425 * the primary, it becomes a fast retransmission trigger by 4426 * the subsequent SET PRIMARY. (by micchie) 4427 */ 4428 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4429 SCTP_MOBILITY_BASE) || 4430 sctp_is_mobility_feature_on(stcb->sctp_ep, 4431 SCTP_MOBILITY_FASTHANDOFF)) { 4432 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4433 if (asoc->deleted_primary != NULL) { 4434 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4435 goto out; 4436 } 4437 asoc->deleted_primary = net; 4438 atomic_add_int(&net->ref_count, 1); 4439 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4440 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4441 sctp_mobility_feature_on(stcb->sctp_ep, 4442 SCTP_MOBILITY_PRIM_DELETED); 4443 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4444 stcb->sctp_ep, stcb, NULL); 4445 } 4446 out: 4447 /* Try to find a confirmed primary */ 4448 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4449 } 4450 if (net == asoc->last_data_chunk_from) { 4451 /* Reset primary */ 4452 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4453 } 4454 if (net == asoc->last_control_chunk_from) { 4455 /* Clear net */ 4456 asoc->last_control_chunk_from = NULL; 4457 } 4458 if (net == stcb->asoc.alternate) { 4459 sctp_free_remote_addr(stcb->asoc.alternate); 4460 stcb->asoc.alternate = NULL; 4461 } 4462 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4463 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4464 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4465 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4466 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4467 sctp_free_remote_addr(net); 4468 } 4469 4470 /* 4471 * remove a remote endpoint address from an association, it will fail if the 4472 * address does not exist. 4473 */ 4474 int 4475 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4476 { 4477 /* 4478 * Here we need to remove a remote address. This is quite simple, we 4479 * first find it in the list of address for the association 4480 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4481 * on that item. Note we do not allow it to be removed if there are 4482 * no other addresses. 4483 */ 4484 struct sctp_association *asoc; 4485 struct sctp_nets *net, *nnet; 4486 4487 asoc = &stcb->asoc; 4488 4489 /* locate the address */ 4490 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4491 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4492 continue; 4493 } 4494 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4495 remaddr)) { 4496 /* we found the guy */ 4497 if (asoc->numnets < 2) { 4498 /* Must have at LEAST two remote addresses */ 4499 return (-1); 4500 } else { 4501 sctp_remove_net(stcb, net); 4502 return (0); 4503 } 4504 } 4505 } 4506 /* not found. */ 4507 return (-2); 4508 } 4509 4510 void 4511 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4512 { 4513 struct sctpvtaghead *chain; 4514 struct sctp_tagblock *twait_block; 4515 int found = 0; 4516 int i; 4517 4518 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4519 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4520 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4521 if ((twait_block->vtag_block[i].v_tag == tag) && 4522 (twait_block->vtag_block[i].lport == lport) && 4523 (twait_block->vtag_block[i].rport == rport)) { 4524 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4525 twait_block->vtag_block[i].v_tag = 0; 4526 twait_block->vtag_block[i].lport = 0; 4527 twait_block->vtag_block[i].rport = 0; 4528 found = 1; 4529 break; 4530 } 4531 } 4532 if (found) 4533 break; 4534 } 4535 } 4536 4537 int 4538 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4539 { 4540 struct sctpvtaghead *chain; 4541 struct sctp_tagblock *twait_block; 4542 int found = 0; 4543 int i; 4544 4545 SCTP_INP_INFO_WLOCK(); 4546 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4547 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4548 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4549 if ((twait_block->vtag_block[i].v_tag == tag) && 4550 (twait_block->vtag_block[i].lport == lport) && 4551 (twait_block->vtag_block[i].rport == rport)) { 4552 found = 1; 4553 break; 4554 } 4555 } 4556 if (found) 4557 break; 4558 } 4559 SCTP_INP_INFO_WUNLOCK(); 4560 return (found); 4561 } 4562 4563 4564 void 4565 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4566 { 4567 struct sctpvtaghead *chain; 4568 struct sctp_tagblock *twait_block; 4569 struct timeval now; 4570 int set, i; 4571 4572 if (time == 0) { 4573 /* Its disabled */ 4574 return; 4575 } 4576 (void)SCTP_GETTIME_TIMEVAL(&now); 4577 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4578 set = 0; 4579 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4580 /* Block(s) present, lets find space, and expire on the fly */ 4581 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4582 if ((twait_block->vtag_block[i].v_tag == 0) && 4583 !set) { 4584 twait_block->vtag_block[i].tv_sec_at_expire = 4585 now.tv_sec + time; 4586 twait_block->vtag_block[i].v_tag = tag; 4587 twait_block->vtag_block[i].lport = lport; 4588 twait_block->vtag_block[i].rport = rport; 4589 set = 1; 4590 } else if ((twait_block->vtag_block[i].v_tag) && 4591 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4592 /* Audit expires this guy */ 4593 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4594 twait_block->vtag_block[i].v_tag = 0; 4595 twait_block->vtag_block[i].lport = 0; 4596 twait_block->vtag_block[i].rport = 0; 4597 if (set == 0) { 4598 /* Reuse it for my new tag */ 4599 twait_block->vtag_block[i].tv_sec_at_expire = 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 } 4605 } 4606 } 4607 if (set) { 4608 /* 4609 * We only do up to the block where we can place our 4610 * tag for audits 4611 */ 4612 break; 4613 } 4614 } 4615 /* Need to add a new block to chain */ 4616 if (!set) { 4617 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4618 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4619 if (twait_block == NULL) { 4620 return; 4621 } 4622 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4623 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4624 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4625 twait_block->vtag_block[0].v_tag = tag; 4626 twait_block->vtag_block[0].lport = lport; 4627 twait_block->vtag_block[0].rport = rport; 4628 } 4629 } 4630 4631 void 4632 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4633 { 4634 struct sctp_tmit_chunk *chk, *nchk; 4635 struct sctp_queued_to_read *control, *ncontrol; 4636 4637 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4638 TAILQ_REMOVE(rh, control, next_instrm); 4639 control->on_strm_q = 0; 4640 if (control->on_read_q == 0) { 4641 sctp_free_remote_addr(control->whoFrom); 4642 if (control->data) { 4643 sctp_m_freem(control->data); 4644 control->data = NULL; 4645 } 4646 } 4647 /* Reassembly free? */ 4648 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4649 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4650 if (chk->data) { 4651 sctp_m_freem(chk->data); 4652 chk->data = NULL; 4653 } 4654 if (chk->holds_key_ref) 4655 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4656 sctp_free_remote_addr(chk->whoTo); 4657 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4658 SCTP_DECR_CHK_COUNT(); 4659 /* sa_ignore FREED_MEMORY */ 4660 } 4661 /* 4662 * We don't free the address here since all the net's were 4663 * freed above. 4664 */ 4665 if (control->on_read_q == 0) { 4666 sctp_free_a_readq(stcb, control); 4667 } 4668 } 4669 } 4670 4671 /*- 4672 * Free the association after un-hashing the remote port. This 4673 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4674 * expect that the input to this function IS a locked TCB. 4675 * It will return 0, if it did NOT destroy the association (instead 4676 * it unlocks it. It will return NON-zero if it either destroyed the 4677 * association OR the association is already destroyed. 4678 */ 4679 int 4680 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4681 { 4682 int i; 4683 struct sctp_association *asoc; 4684 struct sctp_nets *net, *nnet; 4685 struct sctp_laddr *laddr, *naddr; 4686 struct sctp_tmit_chunk *chk, *nchk; 4687 struct sctp_asconf_addr *aparam, *naparam; 4688 struct sctp_asconf_ack *aack, *naack; 4689 struct sctp_stream_reset_list *strrst, *nstrrst; 4690 struct sctp_queued_to_read *sq, *nsq; 4691 struct sctp_stream_queue_pending *sp, *nsp; 4692 sctp_sharedkey_t *shared_key, *nshared_key; 4693 struct socket *so; 4694 4695 /* first, lets purge the entry from the hash table. */ 4696 4697 #ifdef SCTP_LOG_CLOSING 4698 sctp_log_closing(inp, stcb, 6); 4699 #endif 4700 if (stcb->asoc.state == 0) { 4701 #ifdef SCTP_LOG_CLOSING 4702 sctp_log_closing(inp, NULL, 7); 4703 #endif 4704 /* there is no asoc, really TSNH :-0 */ 4705 return (1); 4706 } 4707 if (stcb->asoc.alternate) { 4708 sctp_free_remote_addr(stcb->asoc.alternate); 4709 stcb->asoc.alternate = NULL; 4710 } 4711 /* TEMP CODE */ 4712 if (stcb->freed_from_where == 0) { 4713 /* Only record the first place free happened from */ 4714 stcb->freed_from_where = from_location; 4715 } 4716 /* TEMP CODE */ 4717 4718 asoc = &stcb->asoc; 4719 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4720 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4721 /* nothing around */ 4722 so = NULL; 4723 else 4724 so = inp->sctp_socket; 4725 4726 /* 4727 * We used timer based freeing if a reader or writer is in the way. 4728 * So we first check if we are actually being called from a timer, 4729 * if so we abort early if a reader or writer is still in the way. 4730 */ 4731 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4732 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4733 /* 4734 * is it the timer driving us? if so are the reader/writers 4735 * gone? 4736 */ 4737 if (stcb->asoc.refcnt) { 4738 /* nope, reader or writer in the way */ 4739 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4740 /* no asoc destroyed */ 4741 SCTP_TCB_UNLOCK(stcb); 4742 #ifdef SCTP_LOG_CLOSING 4743 sctp_log_closing(inp, stcb, 8); 4744 #endif 4745 return (0); 4746 } 4747 } 4748 /* Now clean up any other timers */ 4749 sctp_stop_association_timers(stcb, false); 4750 /* Now the read queue needs to be cleaned up (only once) */ 4751 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4752 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4753 SCTP_INP_READ_LOCK(inp); 4754 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4755 if (sq->stcb == stcb) { 4756 sq->do_not_ref_stcb = 1; 4757 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4758 /* 4759 * If there is no end, there never will be 4760 * now. 4761 */ 4762 if (sq->end_added == 0) { 4763 /* Held for PD-API clear that. */ 4764 sq->pdapi_aborted = 1; 4765 sq->held_length = 0; 4766 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4767 /* 4768 * Need to add a PD-API 4769 * aborted indication. 4770 * Setting the control_pdapi 4771 * assures that it will be 4772 * added right after this 4773 * msg. 4774 */ 4775 uint32_t strseq; 4776 4777 stcb->asoc.control_pdapi = sq; 4778 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4779 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4780 stcb, 4781 SCTP_PARTIAL_DELIVERY_ABORTED, 4782 (void *)&strseq, 4783 SCTP_SO_LOCKED); 4784 stcb->asoc.control_pdapi = NULL; 4785 } 4786 } 4787 /* Add an end to wake them */ 4788 sq->end_added = 1; 4789 } 4790 } 4791 SCTP_INP_READ_UNLOCK(inp); 4792 if (stcb->block_entry) { 4793 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4794 stcb->block_entry->error = ECONNRESET; 4795 stcb->block_entry = NULL; 4796 } 4797 } 4798 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4799 /* 4800 * Someone holds a reference OR the socket is unaccepted 4801 * yet. 4802 */ 4803 if ((stcb->asoc.refcnt) || 4804 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4805 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4806 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4807 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4808 } 4809 SCTP_TCB_UNLOCK(stcb); 4810 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4811 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4812 /* nothing around */ 4813 so = NULL; 4814 if (so) { 4815 /* Wake any reader/writers */ 4816 sctp_sorwakeup(inp, so); 4817 sctp_sowwakeup(inp, so); 4818 } 4819 4820 #ifdef SCTP_LOG_CLOSING 4821 sctp_log_closing(inp, stcb, 9); 4822 #endif 4823 /* no asoc destroyed */ 4824 return (0); 4825 } 4826 #ifdef SCTP_LOG_CLOSING 4827 sctp_log_closing(inp, stcb, 10); 4828 #endif 4829 /* 4830 * When I reach here, no others want to kill the assoc yet.. and I 4831 * own the lock. Now its possible an abort comes in when I do the 4832 * lock exchange below to grab all the locks to do the final take 4833 * out. to prevent this we increment the count, which will start a 4834 * timer and blow out above thus assuring us that we hold exclusive 4835 * killing of the asoc. Note that after getting back the TCB lock we 4836 * will go ahead and increment the counter back up and stop any 4837 * timer a passing stranger may have started :-S 4838 */ 4839 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4840 atomic_add_int(&stcb->asoc.refcnt, 1); 4841 4842 SCTP_TCB_UNLOCK(stcb); 4843 SCTP_INP_INFO_WLOCK(); 4844 SCTP_INP_WLOCK(inp); 4845 SCTP_TCB_LOCK(stcb); 4846 } 4847 /* Double check the GONE flag */ 4848 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4849 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4850 /* nothing around */ 4851 so = NULL; 4852 4853 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4854 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4855 /* 4856 * For TCP type we need special handling when we are 4857 * connected. We also include the peel'ed off ones to. 4858 */ 4859 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4860 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4861 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4862 if (so) { 4863 SOCKBUF_LOCK(&so->so_rcv); 4864 so->so_state &= ~(SS_ISCONNECTING | 4865 SS_ISDISCONNECTING | 4866 SS_ISCONFIRMING | 4867 SS_ISCONNECTED); 4868 so->so_state |= SS_ISDISCONNECTED; 4869 socantrcvmore_locked(so); 4870 socantsendmore(so); 4871 sctp_sowwakeup(inp, so); 4872 sctp_sorwakeup(inp, so); 4873 SCTP_SOWAKEUP(so); 4874 } 4875 } 4876 } 4877 4878 /* 4879 * Make it invalid too, that way if its about to run it will abort 4880 * and return. 4881 */ 4882 /* re-increment the lock */ 4883 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4884 atomic_add_int(&stcb->asoc.refcnt, -1); 4885 } 4886 if (stcb->asoc.refcnt) { 4887 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4888 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4889 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4890 SCTP_INP_INFO_WUNLOCK(); 4891 SCTP_INP_WUNLOCK(inp); 4892 } 4893 SCTP_TCB_UNLOCK(stcb); 4894 return (0); 4895 } 4896 asoc->state = 0; 4897 if (inp->sctp_tcbhash) { 4898 LIST_REMOVE(stcb, sctp_tcbhash); 4899 } 4900 if (stcb->asoc.in_asocid_hash) { 4901 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4902 } 4903 /* Now lets remove it from the list of ALL associations in the EP */ 4904 LIST_REMOVE(stcb, sctp_tcblist); 4905 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4906 SCTP_INP_INCR_REF(inp); 4907 SCTP_INP_WUNLOCK(inp); 4908 } 4909 /* pull from vtag hash */ 4910 LIST_REMOVE(stcb, sctp_asocs); 4911 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4912 inp->sctp_lport, stcb->rport); 4913 4914 /* 4915 * Now restop the timers to be sure this is paranoia at is finest! 4916 */ 4917 sctp_stop_association_timers(stcb, true); 4918 4919 /* 4920 * The chunk lists and such SHOULD be empty but we check them just 4921 * in case. 4922 */ 4923 /* anything on the wheel needs to be removed */ 4924 SCTP_TCB_SEND_LOCK(stcb); 4925 for (i = 0; i < asoc->streamoutcnt; i++) { 4926 struct sctp_stream_out *outs; 4927 4928 outs = &asoc->strmout[i]; 4929 /* now clean up any chunks here */ 4930 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4931 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4932 TAILQ_REMOVE(&outs->outqueue, sp, next); 4933 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1); 4934 sctp_free_spbufspace(stcb, asoc, sp); 4935 if (sp->data) { 4936 if (so) { 4937 /* Still an open socket - report */ 4938 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4939 0, (void *)sp, SCTP_SO_LOCKED); 4940 } 4941 if (sp->data) { 4942 sctp_m_freem(sp->data); 4943 sp->data = NULL; 4944 sp->tail_mbuf = NULL; 4945 sp->length = 0; 4946 } 4947 } 4948 if (sp->net) { 4949 sctp_free_remote_addr(sp->net); 4950 sp->net = NULL; 4951 } 4952 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4953 } 4954 } 4955 SCTP_TCB_SEND_UNLOCK(stcb); 4956 /* sa_ignore FREED_MEMORY */ 4957 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4958 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4959 SCTP_FREE(strrst, SCTP_M_STRESET); 4960 } 4961 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4962 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4963 if (sq->data) { 4964 sctp_m_freem(sq->data); 4965 sq->data = NULL; 4966 } 4967 sctp_free_remote_addr(sq->whoFrom); 4968 sq->whoFrom = NULL; 4969 sq->stcb = NULL; 4970 /* Free the ctl entry */ 4971 sctp_free_a_readq(stcb, sq); 4972 /* sa_ignore FREED_MEMORY */ 4973 } 4974 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4975 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4976 if (chk->data) { 4977 sctp_m_freem(chk->data); 4978 chk->data = NULL; 4979 } 4980 if (chk->holds_key_ref) 4981 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4982 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4983 SCTP_DECR_CHK_COUNT(); 4984 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4985 asoc->free_chunk_cnt--; 4986 /* sa_ignore FREED_MEMORY */ 4987 } 4988 /* pending send queue SHOULD be empty */ 4989 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4990 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 4991 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 4992 #ifdef INVARIANTS 4993 } else { 4994 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 4995 #endif 4996 } 4997 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4998 if (chk->data) { 4999 if (so) { 5000 /* Still a socket? */ 5001 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5002 0, chk, SCTP_SO_LOCKED); 5003 } 5004 if (chk->data) { 5005 sctp_m_freem(chk->data); 5006 chk->data = NULL; 5007 } 5008 } 5009 if (chk->holds_key_ref) 5010 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5011 if (chk->whoTo) { 5012 sctp_free_remote_addr(chk->whoTo); 5013 chk->whoTo = NULL; 5014 } 5015 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5016 SCTP_DECR_CHK_COUNT(); 5017 /* sa_ignore FREED_MEMORY */ 5018 } 5019 /* sent queue SHOULD be empty */ 5020 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5021 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5022 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5023 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5024 #ifdef INVARIANTS 5025 } else { 5026 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5027 #endif 5028 } 5029 } 5030 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5031 if (chk->data) { 5032 if (so) { 5033 /* Still a socket? */ 5034 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5035 0, chk, SCTP_SO_LOCKED); 5036 } 5037 if (chk->data) { 5038 sctp_m_freem(chk->data); 5039 chk->data = NULL; 5040 } 5041 } 5042 if (chk->holds_key_ref) 5043 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5044 sctp_free_remote_addr(chk->whoTo); 5045 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5046 SCTP_DECR_CHK_COUNT(); 5047 /* sa_ignore FREED_MEMORY */ 5048 } 5049 #ifdef INVARIANTS 5050 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5051 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5052 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5053 } 5054 } 5055 #endif 5056 /* control queue MAY not be empty */ 5057 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5058 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5059 if (chk->data) { 5060 sctp_m_freem(chk->data); 5061 chk->data = NULL; 5062 } 5063 if (chk->holds_key_ref) 5064 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5065 sctp_free_remote_addr(chk->whoTo); 5066 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5067 SCTP_DECR_CHK_COUNT(); 5068 /* sa_ignore FREED_MEMORY */ 5069 } 5070 /* ASCONF queue MAY not be empty */ 5071 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5072 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5073 if (chk->data) { 5074 sctp_m_freem(chk->data); 5075 chk->data = NULL; 5076 } 5077 if (chk->holds_key_ref) 5078 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5079 sctp_free_remote_addr(chk->whoTo); 5080 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5081 SCTP_DECR_CHK_COUNT(); 5082 /* sa_ignore FREED_MEMORY */ 5083 } 5084 if (asoc->mapping_array) { 5085 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5086 asoc->mapping_array = NULL; 5087 } 5088 if (asoc->nr_mapping_array) { 5089 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5090 asoc->nr_mapping_array = NULL; 5091 } 5092 /* the stream outs */ 5093 if (asoc->strmout) { 5094 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5095 asoc->strmout = NULL; 5096 } 5097 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5098 if (asoc->strmin) { 5099 for (i = 0; i < asoc->streamincnt; i++) { 5100 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5101 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5102 } 5103 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5104 asoc->strmin = NULL; 5105 } 5106 asoc->streamincnt = 0; 5107 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5108 #ifdef INVARIANTS 5109 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5110 panic("no net's left alloc'ed, or list points to itself"); 5111 } 5112 #endif 5113 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5114 sctp_free_remote_addr(net); 5115 } 5116 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5117 /* sa_ignore FREED_MEMORY */ 5118 sctp_remove_laddr(laddr); 5119 } 5120 5121 /* pending asconf (address) parameters */ 5122 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5123 /* sa_ignore FREED_MEMORY */ 5124 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5125 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5126 } 5127 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5128 /* sa_ignore FREED_MEMORY */ 5129 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5130 if (aack->data != NULL) { 5131 sctp_m_freem(aack->data); 5132 } 5133 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5134 } 5135 /* clean up auth stuff */ 5136 if (asoc->local_hmacs) 5137 sctp_free_hmaclist(asoc->local_hmacs); 5138 if (asoc->peer_hmacs) 5139 sctp_free_hmaclist(asoc->peer_hmacs); 5140 5141 if (asoc->local_auth_chunks) 5142 sctp_free_chunklist(asoc->local_auth_chunks); 5143 if (asoc->peer_auth_chunks) 5144 sctp_free_chunklist(asoc->peer_auth_chunks); 5145 5146 sctp_free_authinfo(&asoc->authinfo); 5147 5148 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5149 LIST_REMOVE(shared_key, next); 5150 sctp_free_sharedkey(shared_key); 5151 /* sa_ignore FREED_MEMORY */ 5152 } 5153 5154 /* Insert new items here :> */ 5155 5156 /* Get rid of LOCK */ 5157 SCTP_TCB_UNLOCK(stcb); 5158 SCTP_TCB_LOCK_DESTROY(stcb); 5159 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5160 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5161 SCTP_INP_INFO_WUNLOCK(); 5162 SCTP_INP_RLOCK(inp); 5163 } 5164 #ifdef SCTP_TRACK_FREED_ASOCS 5165 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5166 /* now clean up the tasoc itself */ 5167 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5168 SCTP_DECR_ASOC_COUNT(); 5169 } else { 5170 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5171 } 5172 #else 5173 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5174 SCTP_DECR_ASOC_COUNT(); 5175 #endif 5176 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5177 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5178 /* 5179 * If its NOT the inp_free calling us AND sctp_close 5180 * as been called, we call back... 5181 */ 5182 SCTP_INP_RUNLOCK(inp); 5183 /* 5184 * This will start the kill timer (if we are the 5185 * last one) since we hold an increment yet. But 5186 * this is the only safe way to do this since 5187 * otherwise if the socket closes at the same time 5188 * we are here we might collide in the cleanup. 5189 */ 5190 sctp_inpcb_free(inp, 5191 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5192 SCTP_CALLED_DIRECTLY_NOCMPSET); 5193 SCTP_INP_DECR_REF(inp); 5194 } else { 5195 /* The socket is still open. */ 5196 SCTP_INP_DECR_REF(inp); 5197 SCTP_INP_RUNLOCK(inp); 5198 } 5199 } 5200 /* destroyed the asoc */ 5201 #ifdef SCTP_LOG_CLOSING 5202 sctp_log_closing(inp, NULL, 11); 5203 #endif 5204 return (1); 5205 } 5206 5207 5208 5209 /* 5210 * determine if a destination is "reachable" based upon the addresses bound 5211 * to the current endpoint (e.g. only v4 or v6 currently bound) 5212 */ 5213 /* 5214 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5215 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5216 * types bound as its endpoint 5217 */ 5218 int 5219 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5220 { 5221 struct sctp_inpcb *inp; 5222 int answer; 5223 5224 /* 5225 * No locks here, the TCB, in all cases is already locked and an 5226 * assoc is up. There is either a INP lock by the caller applied (in 5227 * asconf case when deleting an address) or NOT in the HB case, 5228 * however if HB then the INP increment is up and the INP will not 5229 * be removed (on top of the fact that we have a TCB lock). So we 5230 * only want to read the sctp_flags, which is either bound-all or 5231 * not.. no protection needed since once an assoc is up you can't be 5232 * changing your binding. 5233 */ 5234 inp = stcb->sctp_ep; 5235 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5236 /* if bound all, destination is not restricted */ 5237 /* 5238 * RRS: Question during lock work: Is this correct? If you 5239 * are bound-all you still might need to obey the V4--V6 5240 * flags??? IMO this bound-all stuff needs to be removed! 5241 */ 5242 return (1); 5243 } 5244 /* NOTE: all "scope" checks are done when local addresses are added */ 5245 switch (destaddr->sa_family) { 5246 #ifdef INET6 5247 case AF_INET6: 5248 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5249 break; 5250 #endif 5251 #ifdef INET 5252 case AF_INET: 5253 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5254 break; 5255 #endif 5256 default: 5257 /* invalid family, so it's unreachable */ 5258 answer = 0; 5259 break; 5260 } 5261 return (answer); 5262 } 5263 5264 /* 5265 * update the inp_vflags on an endpoint 5266 */ 5267 static void 5268 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5269 { 5270 struct sctp_laddr *laddr; 5271 5272 /* first clear the flag */ 5273 inp->ip_inp.inp.inp_vflag = 0; 5274 /* set the flag based on addresses on the ep list */ 5275 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5276 if (laddr->ifa == NULL) { 5277 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5278 __func__); 5279 continue; 5280 } 5281 5282 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5283 continue; 5284 } 5285 switch (laddr->ifa->address.sa.sa_family) { 5286 #ifdef INET6 5287 case AF_INET6: 5288 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5289 break; 5290 #endif 5291 #ifdef INET 5292 case AF_INET: 5293 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5294 break; 5295 #endif 5296 default: 5297 break; 5298 } 5299 } 5300 } 5301 5302 /* 5303 * Add the address to the endpoint local address list There is nothing to be 5304 * done if we are bound to all addresses 5305 */ 5306 void 5307 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5308 { 5309 struct sctp_laddr *laddr; 5310 struct sctp_tcb *stcb; 5311 int fnd, error = 0; 5312 5313 fnd = 0; 5314 5315 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5316 /* You are already bound to all. You have it already */ 5317 return; 5318 } 5319 #ifdef INET6 5320 if (ifa->address.sa.sa_family == AF_INET6) { 5321 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5322 /* Can't bind a non-useable addr. */ 5323 return; 5324 } 5325 } 5326 #endif 5327 /* first, is it already present? */ 5328 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5329 if (laddr->ifa == ifa) { 5330 fnd = 1; 5331 break; 5332 } 5333 } 5334 5335 if (fnd == 0) { 5336 /* Not in the ep list */ 5337 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5338 if (error != 0) 5339 return; 5340 inp->laddr_count++; 5341 /* update inp_vflag flags */ 5342 switch (ifa->address.sa.sa_family) { 5343 #ifdef INET6 5344 case AF_INET6: 5345 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5346 break; 5347 #endif 5348 #ifdef INET 5349 case AF_INET: 5350 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5351 break; 5352 #endif 5353 default: 5354 break; 5355 } 5356 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5357 sctp_add_local_addr_restricted(stcb, ifa); 5358 } 5359 } 5360 return; 5361 } 5362 5363 5364 /* 5365 * select a new (hopefully reachable) destination net (should only be used 5366 * when we deleted an ep addr that is the only usable source address to reach 5367 * the destination net) 5368 */ 5369 static void 5370 sctp_select_primary_destination(struct sctp_tcb *stcb) 5371 { 5372 struct sctp_nets *net; 5373 5374 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5375 /* for now, we'll just pick the first reachable one we find */ 5376 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5377 continue; 5378 if (sctp_destination_is_reachable(stcb, 5379 (struct sockaddr *)&net->ro._l_addr)) { 5380 /* found a reachable destination */ 5381 stcb->asoc.primary_destination = net; 5382 } 5383 } 5384 /* I can't there from here! ...we're gonna die shortly... */ 5385 } 5386 5387 5388 /* 5389 * Delete the address from the endpoint local address list. There is nothing 5390 * to be done if we are bound to all addresses 5391 */ 5392 void 5393 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5394 { 5395 struct sctp_laddr *laddr; 5396 int fnd; 5397 5398 fnd = 0; 5399 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5400 /* You are already bound to all. You have it already */ 5401 return; 5402 } 5403 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5404 if (laddr->ifa == ifa) { 5405 fnd = 1; 5406 break; 5407 } 5408 } 5409 if (fnd && (inp->laddr_count < 2)) { 5410 /* can't delete unless there are at LEAST 2 addresses */ 5411 return; 5412 } 5413 if (fnd) { 5414 /* 5415 * clean up any use of this address go through our 5416 * associations and clear any last_used_address that match 5417 * this one for each assoc, see if a new primary_destination 5418 * is needed 5419 */ 5420 struct sctp_tcb *stcb; 5421 5422 /* clean up "next_addr_touse" */ 5423 if (inp->next_addr_touse == laddr) 5424 /* delete this address */ 5425 inp->next_addr_touse = NULL; 5426 5427 /* clean up "last_used_address" */ 5428 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5429 struct sctp_nets *net; 5430 5431 SCTP_TCB_LOCK(stcb); 5432 if (stcb->asoc.last_used_address == laddr) 5433 /* delete this address */ 5434 stcb->asoc.last_used_address = NULL; 5435 /* 5436 * Now spin through all the nets and purge any ref 5437 * to laddr 5438 */ 5439 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5440 if (net->ro._s_addr == laddr->ifa) { 5441 /* Yep, purge src address selected */ 5442 RO_NHFREE(&net->ro); 5443 sctp_free_ifa(net->ro._s_addr); 5444 net->ro._s_addr = NULL; 5445 net->src_addr_selected = 0; 5446 } 5447 } 5448 SCTP_TCB_UNLOCK(stcb); 5449 } /* for each tcb */ 5450 /* remove it from the ep list */ 5451 sctp_remove_laddr(laddr); 5452 inp->laddr_count--; 5453 /* update inp_vflag flags */ 5454 sctp_update_ep_vflag(inp); 5455 } 5456 return; 5457 } 5458 5459 /* 5460 * Add the address to the TCB local address restricted list. 5461 * This is a "pending" address list (eg. addresses waiting for an 5462 * ASCONF-ACK response) and cannot be used as a valid source address. 5463 */ 5464 void 5465 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5466 { 5467 struct sctp_laddr *laddr; 5468 struct sctpladdr *list; 5469 5470 /* 5471 * Assumes TCB is locked.. and possibly the INP. May need to 5472 * confirm/fix that if we need it and is not the case. 5473 */ 5474 list = &stcb->asoc.sctp_restricted_addrs; 5475 5476 #ifdef INET6 5477 if (ifa->address.sa.sa_family == AF_INET6) { 5478 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5479 /* Can't bind a non-existent addr. */ 5480 return; 5481 } 5482 } 5483 #endif 5484 /* does the address already exist? */ 5485 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5486 if (laddr->ifa == ifa) { 5487 return; 5488 } 5489 } 5490 5491 /* add to the list */ 5492 (void)sctp_insert_laddr(list, ifa, 0); 5493 return; 5494 } 5495 5496 /* 5497 * Remove a local address from the TCB local address restricted list 5498 */ 5499 void 5500 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5501 { 5502 struct sctp_inpcb *inp; 5503 struct sctp_laddr *laddr; 5504 5505 /* 5506 * This is called by asconf work. It is assumed that a) The TCB is 5507 * locked and b) The INP is locked. This is true in as much as I can 5508 * trace through the entry asconf code where I did these locks. 5509 * Again, the ASCONF code is a bit different in that it does lock 5510 * the INP during its work often times. This must be since we don't 5511 * want other proc's looking up things while what they are looking 5512 * up is changing :-D 5513 */ 5514 5515 inp = stcb->sctp_ep; 5516 /* if subset bound and don't allow ASCONF's, can't delete last */ 5517 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5518 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5519 if (stcb->sctp_ep->laddr_count < 2) { 5520 /* can't delete last address */ 5521 return; 5522 } 5523 } 5524 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5525 /* remove the address if it exists */ 5526 if (laddr->ifa == NULL) 5527 continue; 5528 if (laddr->ifa == ifa) { 5529 sctp_remove_laddr(laddr); 5530 return; 5531 } 5532 } 5533 5534 /* address not found! */ 5535 return; 5536 } 5537 5538 /* 5539 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5540 */ 5541 /* sysctl */ 5542 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5543 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5544 5545 5546 5547 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5548 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5549 int *sctp_cpuarry = NULL; 5550 void 5551 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5552 { 5553 /* Queue a packet to a processor for the specified core */ 5554 struct sctp_mcore_queue *qent; 5555 struct sctp_mcore_ctrl *wkq; 5556 int need_wake = 0; 5557 5558 if (sctp_mcore_workers == NULL) { 5559 /* Something went way bad during setup */ 5560 sctp_input_with_port(m, off, 0); 5561 return; 5562 } 5563 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5564 (sizeof(struct sctp_mcore_queue)), 5565 SCTP_M_MCORE); 5566 if (qent == NULL) { 5567 /* This is trouble */ 5568 sctp_input_with_port(m, off, 0); 5569 return; 5570 } 5571 qent->vn = curvnet; 5572 qent->m = m; 5573 qent->off = off; 5574 qent->v6 = 0; 5575 wkq = &sctp_mcore_workers[cpu_to_use]; 5576 SCTP_MCORE_QLOCK(wkq); 5577 5578 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5579 if (wkq->running == 0) { 5580 need_wake = 1; 5581 } 5582 SCTP_MCORE_QUNLOCK(wkq); 5583 if (need_wake) { 5584 wakeup(&wkq->running); 5585 } 5586 } 5587 5588 static void 5589 sctp_mcore_thread(void *arg) 5590 { 5591 5592 struct sctp_mcore_ctrl *wkq; 5593 struct sctp_mcore_queue *qent; 5594 5595 wkq = (struct sctp_mcore_ctrl *)arg; 5596 struct mbuf *m; 5597 int off, v6; 5598 5599 /* Wait for first tickle */ 5600 SCTP_MCORE_LOCK(wkq); 5601 wkq->running = 0; 5602 msleep(&wkq->running, 5603 &wkq->core_mtx, 5604 0, "wait for pkt", 0); 5605 SCTP_MCORE_UNLOCK(wkq); 5606 5607 /* Bind to our cpu */ 5608 thread_lock(curthread); 5609 sched_bind(curthread, wkq->cpuid); 5610 thread_unlock(curthread); 5611 5612 /* Now lets start working */ 5613 SCTP_MCORE_LOCK(wkq); 5614 /* Now grab lock and go */ 5615 for (;;) { 5616 SCTP_MCORE_QLOCK(wkq); 5617 skip_sleep: 5618 wkq->running = 1; 5619 qent = TAILQ_FIRST(&wkq->que); 5620 if (qent) { 5621 TAILQ_REMOVE(&wkq->que, qent, next); 5622 SCTP_MCORE_QUNLOCK(wkq); 5623 CURVNET_SET(qent->vn); 5624 m = qent->m; 5625 off = qent->off; 5626 v6 = qent->v6; 5627 SCTP_FREE(qent, SCTP_M_MCORE); 5628 if (v6 == 0) { 5629 sctp_input_with_port(m, off, 0); 5630 } else { 5631 SCTP_PRINTF("V6 not yet supported\n"); 5632 sctp_m_freem(m); 5633 } 5634 CURVNET_RESTORE(); 5635 SCTP_MCORE_QLOCK(wkq); 5636 } 5637 wkq->running = 0; 5638 if (!TAILQ_EMPTY(&wkq->que)) { 5639 goto skip_sleep; 5640 } 5641 SCTP_MCORE_QUNLOCK(wkq); 5642 msleep(&wkq->running, 5643 &wkq->core_mtx, 5644 0, "wait for pkt", 0); 5645 } 5646 } 5647 5648 static void 5649 sctp_startup_mcore_threads(void) 5650 { 5651 int i, cpu; 5652 5653 if (mp_ncpus == 1) 5654 return; 5655 5656 if (sctp_mcore_workers != NULL) { 5657 /* 5658 * Already been here in some previous vnet? 5659 */ 5660 return; 5661 } 5662 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5663 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5664 SCTP_M_MCORE); 5665 if (sctp_mcore_workers == NULL) { 5666 /* TSNH I hope */ 5667 return; 5668 } 5669 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5670 sizeof(struct sctp_mcore_ctrl))); 5671 /* Init the structures */ 5672 for (i = 0; i <= mp_maxid; i++) { 5673 TAILQ_INIT(&sctp_mcore_workers[i].que); 5674 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5675 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5676 sctp_mcore_workers[i].cpuid = i; 5677 } 5678 if (sctp_cpuarry == NULL) { 5679 SCTP_MALLOC(sctp_cpuarry, int *, 5680 (mp_ncpus * sizeof(int)), 5681 SCTP_M_MCORE); 5682 i = 0; 5683 CPU_FOREACH(cpu) { 5684 sctp_cpuarry[i] = cpu; 5685 i++; 5686 } 5687 } 5688 /* Now start them all */ 5689 CPU_FOREACH(cpu) { 5690 (void)kproc_create(sctp_mcore_thread, 5691 (void *)&sctp_mcore_workers[cpu], 5692 &sctp_mcore_workers[cpu].thread_proc, 5693 RFPROC, 5694 SCTP_KTHREAD_PAGES, 5695 SCTP_MCORE_NAME); 5696 } 5697 } 5698 #endif 5699 5700 void 5701 sctp_pcb_init(void) 5702 { 5703 /* 5704 * SCTP initialization for the PCB structures should be called by 5705 * the sctp_init() function. 5706 */ 5707 int i; 5708 struct timeval tv; 5709 5710 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5711 /* error I was called twice */ 5712 return; 5713 } 5714 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5715 5716 #if defined(SCTP_LOCAL_TRACE_BUF) 5717 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5718 #endif 5719 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5720 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5721 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5722 SCTP_M_MCORE); 5723 #endif 5724 (void)SCTP_GETTIME_TIMEVAL(&tv); 5725 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5726 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5727 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5728 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5729 #else 5730 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5731 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5732 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5733 #endif 5734 /* init the empty list of (All) Endpoints */ 5735 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5736 5737 5738 /* init the hash table of endpoints */ 5739 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5740 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5741 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5742 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5743 &SCTP_BASE_INFO(hashasocmark)); 5744 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5745 &SCTP_BASE_INFO(hashmark)); 5746 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5747 &SCTP_BASE_INFO(hashtcpmark)); 5748 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5749 5750 5751 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5752 &SCTP_BASE_INFO(hashvrfmark)); 5753 5754 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5755 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5756 /* init the zones */ 5757 /* 5758 * FIX ME: Should check for NULL returns, but if it does fail we are 5759 * doomed to panic anyways... add later maybe. 5760 */ 5761 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5762 sizeof(struct sctp_inpcb), maxsockets); 5763 5764 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5765 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5766 5767 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5768 sizeof(struct sctp_laddr), 5769 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5770 5771 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5772 sizeof(struct sctp_nets), 5773 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5774 5775 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5776 sizeof(struct sctp_tmit_chunk), 5777 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5778 5779 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5780 sizeof(struct sctp_queued_to_read), 5781 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5782 5783 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5784 sizeof(struct sctp_stream_queue_pending), 5785 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5786 5787 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5788 sizeof(struct sctp_asconf), 5789 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5790 5791 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5792 sizeof(struct sctp_asconf_ack), 5793 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5794 5795 5796 /* Master Lock INIT for info structure */ 5797 SCTP_INP_INFO_LOCK_INIT(); 5798 SCTP_STATLOG_INIT_LOCK(); 5799 5800 SCTP_IPI_COUNT_INIT(); 5801 SCTP_IPI_ADDR_INIT(); 5802 #ifdef SCTP_PACKET_LOGGING 5803 SCTP_IP_PKTLOG_INIT(); 5804 #endif 5805 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5806 5807 SCTP_WQ_ADDR_INIT(); 5808 /* not sure if we need all the counts */ 5809 SCTP_BASE_INFO(ipi_count_ep) = 0; 5810 /* assoc/tcb zone info */ 5811 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5812 /* local addrlist zone info */ 5813 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5814 /* remote addrlist zone info */ 5815 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5816 /* chunk info */ 5817 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5818 5819 /* socket queue zone info */ 5820 SCTP_BASE_INFO(ipi_count_readq) = 0; 5821 5822 /* stream out queue cont */ 5823 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5824 5825 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5826 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5827 5828 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5829 5830 /* Init the TIMEWAIT list */ 5831 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5832 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5833 } 5834 sctp_startup_iterator(); 5835 5836 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5837 sctp_startup_mcore_threads(); 5838 #endif 5839 5840 /* 5841 * INIT the default VRF which for BSD is the only one, other O/S's 5842 * may have more. But initially they must start with one and then 5843 * add the VRF's as addresses are added. 5844 */ 5845 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5846 } 5847 5848 /* 5849 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5850 */ 5851 void 5852 sctp_pcb_finish(void) 5853 { 5854 struct sctp_vrflist *vrf_bucket; 5855 struct sctp_vrf *vrf, *nvrf; 5856 struct sctp_ifn *ifn, *nifn; 5857 struct sctp_ifa *ifa, *nifa; 5858 struct sctpvtaghead *chain; 5859 struct sctp_tagblock *twait_block, *prev_twait_block; 5860 struct sctp_laddr *wi, *nwi; 5861 int i; 5862 struct sctp_iterator *it, *nit; 5863 5864 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5865 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5866 return; 5867 } 5868 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5869 /* 5870 * In FreeBSD the iterator thread never exits but we do clean up. 5871 * The only way FreeBSD reaches here is if we have VRF's but we 5872 * still add the ifdef to make it compile on old versions. 5873 */ 5874 retry: 5875 SCTP_IPI_ITERATOR_WQ_LOCK(); 5876 /* 5877 * sctp_iterator_worker() might be working on an it entry without 5878 * holding the lock. We won't find it on the list either and 5879 * continue and free/destroy it. While holding the lock, spin, to 5880 * avoid the race condition as sctp_iterator_worker() will have to 5881 * wait to re-acquire the lock. 5882 */ 5883 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5884 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5885 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5886 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5887 DELAY(10); 5888 goto retry; 5889 } 5890 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5891 if (it->vn != curvnet) { 5892 continue; 5893 } 5894 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5895 if (it->function_atend != NULL) { 5896 (*it->function_atend) (it->pointer, it->val); 5897 } 5898 SCTP_FREE(it, SCTP_M_ITER); 5899 } 5900 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5901 SCTP_ITERATOR_LOCK(); 5902 if ((sctp_it_ctl.cur_it) && 5903 (sctp_it_ctl.cur_it->vn == curvnet)) { 5904 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5905 } 5906 SCTP_ITERATOR_UNLOCK(); 5907 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5908 SCTP_WQ_ADDR_LOCK(); 5909 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5910 LIST_REMOVE(wi, sctp_nxt_addr); 5911 SCTP_DECR_LADDR_COUNT(); 5912 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5913 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5914 } 5915 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5916 } 5917 SCTP_WQ_ADDR_UNLOCK(); 5918 5919 /* 5920 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5921 * destroyed first). 5922 */ 5923 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5924 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5925 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5926 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5927 /* free the ifa */ 5928 LIST_REMOVE(ifa, next_bucket); 5929 LIST_REMOVE(ifa, next_ifa); 5930 SCTP_FREE(ifa, SCTP_M_IFA); 5931 } 5932 /* free the ifn */ 5933 LIST_REMOVE(ifn, next_bucket); 5934 LIST_REMOVE(ifn, next_ifn); 5935 SCTP_FREE(ifn, SCTP_M_IFN); 5936 } 5937 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5938 /* free the vrf */ 5939 LIST_REMOVE(vrf, next_vrf); 5940 SCTP_FREE(vrf, SCTP_M_VRF); 5941 } 5942 /* free the vrf hashes */ 5943 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5944 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5945 5946 /* 5947 * free the TIMEWAIT list elements malloc'd in the function 5948 * sctp_add_vtag_to_timewait()... 5949 */ 5950 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5951 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5952 if (!LIST_EMPTY(chain)) { 5953 prev_twait_block = NULL; 5954 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5955 if (prev_twait_block) { 5956 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5957 } 5958 prev_twait_block = twait_block; 5959 } 5960 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5961 } 5962 } 5963 5964 /* free the locks and mutexes */ 5965 #ifdef SCTP_PACKET_LOGGING 5966 SCTP_IP_PKTLOG_DESTROY(); 5967 #endif 5968 SCTP_IPI_ADDR_DESTROY(); 5969 SCTP_STATLOG_DESTROY(); 5970 SCTP_INP_INFO_LOCK_DESTROY(); 5971 5972 SCTP_WQ_ADDR_DESTROY(); 5973 5974 /* Get rid of other stuff too. */ 5975 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5976 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5977 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5978 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5979 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5980 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5981 5982 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5983 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5984 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5985 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5986 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5987 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5988 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5989 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5990 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5991 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5992 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5993 #endif 5994 } 5995 5996 5997 int 5998 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5999 int offset, int limit, 6000 struct sockaddr *src, struct sockaddr *dst, 6001 struct sockaddr *altsa, uint16_t port) 6002 { 6003 /* 6004 * grub through the INIT pulling addresses and loading them to the 6005 * nets structure in the asoc. The from address in the mbuf should 6006 * also be loaded (if it is not already). This routine can be called 6007 * with either INIT or INIT-ACK's as long as the m points to the IP 6008 * packet and the offset points to the beginning of the parameters. 6009 */ 6010 struct sctp_inpcb *inp; 6011 struct sctp_nets *net, *nnet, *net_tmp; 6012 struct sctp_paramhdr *phdr, param_buf; 6013 struct sctp_tcb *stcb_tmp; 6014 uint16_t ptype, plen; 6015 struct sockaddr *sa; 6016 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6017 struct sctp_auth_random *p_random = NULL; 6018 uint16_t random_len = 0; 6019 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6020 struct sctp_auth_hmac_algo *hmacs = NULL; 6021 uint16_t hmacs_len = 0; 6022 uint8_t saw_asconf = 0; 6023 uint8_t saw_asconf_ack = 0; 6024 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6025 struct sctp_auth_chunk_list *chunks = NULL; 6026 uint16_t num_chunks = 0; 6027 sctp_key_t *new_key; 6028 uint32_t keylen; 6029 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6030 uint8_t peer_supports_ecn; 6031 uint8_t peer_supports_prsctp; 6032 uint8_t peer_supports_auth; 6033 uint8_t peer_supports_asconf; 6034 uint8_t peer_supports_asconf_ack; 6035 uint8_t peer_supports_reconfig; 6036 uint8_t peer_supports_nrsack; 6037 uint8_t peer_supports_pktdrop; 6038 uint8_t peer_supports_idata; 6039 #ifdef INET 6040 struct sockaddr_in sin; 6041 #endif 6042 #ifdef INET6 6043 struct sockaddr_in6 sin6; 6044 #endif 6045 6046 /* First get the destination address setup too. */ 6047 #ifdef INET 6048 memset(&sin, 0, sizeof(sin)); 6049 sin.sin_family = AF_INET; 6050 sin.sin_len = sizeof(sin); 6051 sin.sin_port = stcb->rport; 6052 #endif 6053 #ifdef INET6 6054 memset(&sin6, 0, sizeof(sin6)); 6055 sin6.sin6_family = AF_INET6; 6056 sin6.sin6_len = sizeof(struct sockaddr_in6); 6057 sin6.sin6_port = stcb->rport; 6058 #endif 6059 if (altsa) { 6060 sa = altsa; 6061 } else { 6062 sa = src; 6063 } 6064 peer_supports_idata = 0; 6065 peer_supports_ecn = 0; 6066 peer_supports_prsctp = 0; 6067 peer_supports_auth = 0; 6068 peer_supports_asconf = 0; 6069 peer_supports_reconfig = 0; 6070 peer_supports_nrsack = 0; 6071 peer_supports_pktdrop = 0; 6072 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6073 /* mark all addresses that we have currently on the list */ 6074 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6075 } 6076 /* does the source address already exist? if so skip it */ 6077 inp = stcb->sctp_ep; 6078 atomic_add_int(&stcb->asoc.refcnt, 1); 6079 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6080 atomic_add_int(&stcb->asoc.refcnt, -1); 6081 6082 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6083 /* we must add the source address */ 6084 /* no scope set here since we have a tcb already. */ 6085 switch (sa->sa_family) { 6086 #ifdef INET 6087 case AF_INET: 6088 if (stcb->asoc.scope.ipv4_addr_legal) { 6089 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6090 return (-1); 6091 } 6092 } 6093 break; 6094 #endif 6095 #ifdef INET6 6096 case AF_INET6: 6097 if (stcb->asoc.scope.ipv6_addr_legal) { 6098 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6099 return (-2); 6100 } 6101 } 6102 break; 6103 #endif 6104 default: 6105 break; 6106 } 6107 } else { 6108 if (net_tmp != NULL && stcb_tmp == stcb) { 6109 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6110 } else if (stcb_tmp != stcb) { 6111 /* It belongs to another association? */ 6112 if (stcb_tmp) 6113 SCTP_TCB_UNLOCK(stcb_tmp); 6114 return (-3); 6115 } 6116 } 6117 if (stcb->asoc.state == 0) { 6118 /* the assoc was freed? */ 6119 return (-4); 6120 } 6121 /* now we must go through each of the params. */ 6122 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6123 while (phdr) { 6124 ptype = ntohs(phdr->param_type); 6125 plen = ntohs(phdr->param_length); 6126 /* 6127 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6128 * (uint32_t)ptype, (int)plen); 6129 */ 6130 if (offset + plen > limit) { 6131 break; 6132 } 6133 if (plen < sizeof(struct sctp_paramhdr)) { 6134 break; 6135 } 6136 #ifdef INET 6137 if (ptype == SCTP_IPV4_ADDRESS) { 6138 if (stcb->asoc.scope.ipv4_addr_legal) { 6139 struct sctp_ipv4addr_param *p4, p4_buf; 6140 6141 /* ok get the v4 address and check/add */ 6142 phdr = sctp_get_next_param(m, offset, 6143 (struct sctp_paramhdr *)&p4_buf, 6144 sizeof(p4_buf)); 6145 if (plen != sizeof(struct sctp_ipv4addr_param) || 6146 phdr == NULL) { 6147 return (-5); 6148 } 6149 p4 = (struct sctp_ipv4addr_param *)phdr; 6150 sin.sin_addr.s_addr = p4->addr; 6151 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6152 /* Skip multi-cast addresses */ 6153 goto next_param; 6154 } 6155 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6156 (sin.sin_addr.s_addr == INADDR_ANY)) { 6157 goto next_param; 6158 } 6159 sa = (struct sockaddr *)&sin; 6160 inp = stcb->sctp_ep; 6161 atomic_add_int(&stcb->asoc.refcnt, 1); 6162 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6163 dst, stcb); 6164 atomic_add_int(&stcb->asoc.refcnt, -1); 6165 6166 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6167 inp == NULL) { 6168 /* we must add the source address */ 6169 /* 6170 * no scope set since we have a tcb 6171 * already 6172 */ 6173 6174 /* 6175 * we must validate the state again 6176 * here 6177 */ 6178 add_it_now: 6179 if (stcb->asoc.state == 0) { 6180 /* the assoc was freed? */ 6181 return (-7); 6182 } 6183 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6184 return (-8); 6185 } 6186 } else if (stcb_tmp == stcb) { 6187 if (stcb->asoc.state == 0) { 6188 /* the assoc was freed? */ 6189 return (-10); 6190 } 6191 if (net != NULL) { 6192 /* clear flag */ 6193 net->dest_state &= 6194 ~SCTP_ADDR_NOT_IN_ASSOC; 6195 } 6196 } else { 6197 /* 6198 * strange, address is in another 6199 * assoc? straighten out locks. 6200 */ 6201 if (stcb_tmp) { 6202 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6203 struct mbuf *op_err; 6204 char msg[SCTP_DIAG_INFO_LEN]; 6205 6206 /* 6207 * in setup state we 6208 * abort this guy 6209 */ 6210 SCTP_SNPRINTF(msg, sizeof(msg), 6211 "%s:%d at %s", __FILE__, __LINE__, __func__); 6212 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6213 msg); 6214 sctp_abort_an_association(stcb_tmp->sctp_ep, 6215 stcb_tmp, op_err, 6216 SCTP_SO_NOT_LOCKED); 6217 goto add_it_now; 6218 } 6219 SCTP_TCB_UNLOCK(stcb_tmp); 6220 } 6221 6222 if (stcb->asoc.state == 0) { 6223 /* the assoc was freed? */ 6224 return (-12); 6225 } 6226 return (-13); 6227 } 6228 } 6229 } else 6230 #endif 6231 #ifdef INET6 6232 if (ptype == SCTP_IPV6_ADDRESS) { 6233 if (stcb->asoc.scope.ipv6_addr_legal) { 6234 /* ok get the v6 address and check/add */ 6235 struct sctp_ipv6addr_param *p6, p6_buf; 6236 6237 phdr = sctp_get_next_param(m, offset, 6238 (struct sctp_paramhdr *)&p6_buf, 6239 sizeof(p6_buf)); 6240 if (plen != sizeof(struct sctp_ipv6addr_param) || 6241 phdr == NULL) { 6242 return (-14); 6243 } 6244 p6 = (struct sctp_ipv6addr_param *)phdr; 6245 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6246 sizeof(p6->addr)); 6247 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6248 /* Skip multi-cast addresses */ 6249 goto next_param; 6250 } 6251 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6252 /* 6253 * Link local make no sense without 6254 * scope 6255 */ 6256 goto next_param; 6257 } 6258 sa = (struct sockaddr *)&sin6; 6259 inp = stcb->sctp_ep; 6260 atomic_add_int(&stcb->asoc.refcnt, 1); 6261 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6262 dst, stcb); 6263 atomic_add_int(&stcb->asoc.refcnt, -1); 6264 if (stcb_tmp == NULL && 6265 (inp == stcb->sctp_ep || inp == NULL)) { 6266 /* 6267 * we must validate the state again 6268 * here 6269 */ 6270 add_it_now6: 6271 if (stcb->asoc.state == 0) { 6272 /* the assoc was freed? */ 6273 return (-16); 6274 } 6275 /* 6276 * we must add the address, no scope 6277 * set 6278 */ 6279 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6280 return (-17); 6281 } 6282 } else if (stcb_tmp == stcb) { 6283 /* 6284 * we must validate the state again 6285 * here 6286 */ 6287 if (stcb->asoc.state == 0) { 6288 /* the assoc was freed? */ 6289 return (-19); 6290 } 6291 if (net != NULL) { 6292 /* clear flag */ 6293 net->dest_state &= 6294 ~SCTP_ADDR_NOT_IN_ASSOC; 6295 } 6296 } else { 6297 /* 6298 * strange, address is in another 6299 * assoc? straighten out locks. 6300 */ 6301 if (stcb_tmp) { 6302 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6303 struct mbuf *op_err; 6304 char msg[SCTP_DIAG_INFO_LEN]; 6305 6306 /* 6307 * in setup state we 6308 * abort this guy 6309 */ 6310 SCTP_SNPRINTF(msg, sizeof(msg), 6311 "%s:%d at %s", __FILE__, __LINE__, __func__); 6312 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6313 msg); 6314 sctp_abort_an_association(stcb_tmp->sctp_ep, 6315 stcb_tmp, op_err, 6316 SCTP_SO_NOT_LOCKED); 6317 goto add_it_now6; 6318 } 6319 SCTP_TCB_UNLOCK(stcb_tmp); 6320 } 6321 if (stcb->asoc.state == 0) { 6322 /* the assoc was freed? */ 6323 return (-21); 6324 } 6325 return (-22); 6326 } 6327 } 6328 } else 6329 #endif 6330 if (ptype == SCTP_ECN_CAPABLE) { 6331 peer_supports_ecn = 1; 6332 } else if (ptype == SCTP_ULP_ADAPTATION) { 6333 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6334 struct sctp_adaptation_layer_indication ai, 6335 *aip; 6336 6337 phdr = sctp_get_next_param(m, offset, 6338 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6339 aip = (struct sctp_adaptation_layer_indication *)phdr; 6340 if (aip) { 6341 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6342 stcb->asoc.adaptation_needed = 1; 6343 } 6344 } 6345 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6346 struct sctp_asconf_addr_param lstore, *fee; 6347 int lptype; 6348 struct sockaddr *lsa = NULL; 6349 #ifdef INET 6350 struct sctp_asconf_addrv4_param *fii; 6351 #endif 6352 6353 if (stcb->asoc.asconf_supported == 0) { 6354 return (-100); 6355 } 6356 if (plen > sizeof(lstore)) { 6357 return (-23); 6358 } 6359 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6360 return (-101); 6361 } 6362 phdr = sctp_get_next_param(m, offset, 6363 (struct sctp_paramhdr *)&lstore, 6364 plen); 6365 if (phdr == NULL) { 6366 return (-24); 6367 } 6368 fee = (struct sctp_asconf_addr_param *)phdr; 6369 lptype = ntohs(fee->addrp.ph.param_type); 6370 switch (lptype) { 6371 #ifdef INET 6372 case SCTP_IPV4_ADDRESS: 6373 if (plen != 6374 sizeof(struct sctp_asconf_addrv4_param)) { 6375 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6376 (int)sizeof(struct sctp_asconf_addrv4_param), 6377 plen); 6378 } else { 6379 fii = (struct sctp_asconf_addrv4_param *)fee; 6380 sin.sin_addr.s_addr = fii->addrp.addr; 6381 lsa = (struct sockaddr *)&sin; 6382 } 6383 break; 6384 #endif 6385 #ifdef INET6 6386 case SCTP_IPV6_ADDRESS: 6387 if (plen != 6388 sizeof(struct sctp_asconf_addr_param)) { 6389 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6390 (int)sizeof(struct sctp_asconf_addr_param), 6391 plen); 6392 } else { 6393 memcpy(sin6.sin6_addr.s6_addr, 6394 fee->addrp.addr, 6395 sizeof(fee->addrp.addr)); 6396 lsa = (struct sockaddr *)&sin6; 6397 } 6398 break; 6399 #endif 6400 default: 6401 break; 6402 } 6403 if (lsa) { 6404 (void)sctp_set_primary_addr(stcb, sa, NULL); 6405 } 6406 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6407 stcb->asoc.peer_supports_nat = 1; 6408 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6409 /* Peer supports pr-sctp */ 6410 peer_supports_prsctp = 1; 6411 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6412 /* A supported extension chunk */ 6413 struct sctp_supported_chunk_types_param *pr_supported; 6414 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6415 int num_ent, i; 6416 6417 if (plen > sizeof(local_store)) { 6418 return (-35); 6419 } 6420 phdr = sctp_get_next_param(m, offset, 6421 (struct sctp_paramhdr *)&local_store, plen); 6422 if (phdr == NULL) { 6423 return (-25); 6424 } 6425 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6426 num_ent = plen - sizeof(struct sctp_paramhdr); 6427 for (i = 0; i < num_ent; i++) { 6428 switch (pr_supported->chunk_types[i]) { 6429 case SCTP_ASCONF: 6430 peer_supports_asconf = 1; 6431 break; 6432 case SCTP_ASCONF_ACK: 6433 peer_supports_asconf_ack = 1; 6434 break; 6435 case SCTP_FORWARD_CUM_TSN: 6436 peer_supports_prsctp = 1; 6437 break; 6438 case SCTP_PACKET_DROPPED: 6439 peer_supports_pktdrop = 1; 6440 break; 6441 case SCTP_NR_SELECTIVE_ACK: 6442 peer_supports_nrsack = 1; 6443 break; 6444 case SCTP_STREAM_RESET: 6445 peer_supports_reconfig = 1; 6446 break; 6447 case SCTP_AUTHENTICATION: 6448 peer_supports_auth = 1; 6449 break; 6450 case SCTP_IDATA: 6451 peer_supports_idata = 1; 6452 break; 6453 default: 6454 /* one I have not learned yet */ 6455 break; 6456 6457 } 6458 } 6459 } else if (ptype == SCTP_RANDOM) { 6460 if (plen > sizeof(random_store)) 6461 break; 6462 if (got_random) { 6463 /* already processed a RANDOM */ 6464 goto next_param; 6465 } 6466 phdr = sctp_get_next_param(m, offset, 6467 (struct sctp_paramhdr *)random_store, 6468 plen); 6469 if (phdr == NULL) 6470 return (-26); 6471 p_random = (struct sctp_auth_random *)phdr; 6472 random_len = plen - sizeof(*p_random); 6473 /* enforce the random length */ 6474 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6475 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6476 return (-27); 6477 } 6478 got_random = 1; 6479 } else if (ptype == SCTP_HMAC_LIST) { 6480 uint16_t num_hmacs; 6481 uint16_t i; 6482 6483 if (plen > sizeof(hmacs_store)) 6484 break; 6485 if (got_hmacs) { 6486 /* already processed a HMAC list */ 6487 goto next_param; 6488 } 6489 phdr = sctp_get_next_param(m, offset, 6490 (struct sctp_paramhdr *)hmacs_store, 6491 plen); 6492 if (phdr == NULL) 6493 return (-28); 6494 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6495 hmacs_len = plen - sizeof(*hmacs); 6496 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6497 /* validate the hmac list */ 6498 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6499 return (-29); 6500 } 6501 if (stcb->asoc.peer_hmacs != NULL) 6502 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6503 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6504 if (stcb->asoc.peer_hmacs != NULL) { 6505 for (i = 0; i < num_hmacs; i++) { 6506 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6507 ntohs(hmacs->hmac_ids[i])); 6508 } 6509 } 6510 got_hmacs = 1; 6511 } else if (ptype == SCTP_CHUNK_LIST) { 6512 int i; 6513 6514 if (plen > sizeof(chunks_store)) 6515 break; 6516 if (got_chklist) { 6517 /* already processed a Chunks list */ 6518 goto next_param; 6519 } 6520 phdr = sctp_get_next_param(m, offset, 6521 (struct sctp_paramhdr *)chunks_store, 6522 plen); 6523 if (phdr == NULL) 6524 return (-30); 6525 chunks = (struct sctp_auth_chunk_list *)phdr; 6526 num_chunks = plen - sizeof(*chunks); 6527 if (stcb->asoc.peer_auth_chunks != NULL) 6528 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6529 else 6530 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6531 for (i = 0; i < num_chunks; i++) { 6532 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6533 stcb->asoc.peer_auth_chunks); 6534 /* record asconf/asconf-ack if listed */ 6535 if (chunks->chunk_types[i] == SCTP_ASCONF) 6536 saw_asconf = 1; 6537 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6538 saw_asconf_ack = 1; 6539 6540 } 6541 got_chklist = 1; 6542 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6543 (ptype == SCTP_STATE_COOKIE) || 6544 (ptype == SCTP_UNRECOG_PARAM) || 6545 (ptype == SCTP_COOKIE_PRESERVE) || 6546 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6547 (ptype == SCTP_ADD_IP_ADDRESS) || 6548 (ptype == SCTP_DEL_IP_ADDRESS) || 6549 (ptype == SCTP_ERROR_CAUSE_IND) || 6550 (ptype == SCTP_SUCCESS_REPORT)) { 6551 /* don't care */ ; 6552 } else { 6553 if ((ptype & 0x8000) == 0x0000) { 6554 /* 6555 * must stop processing the rest of the 6556 * param's. Any report bits were handled 6557 * with the call to 6558 * sctp_arethere_unrecognized_parameters() 6559 * when the INIT or INIT-ACK was first seen. 6560 */ 6561 break; 6562 } 6563 } 6564 6565 next_param: 6566 offset += SCTP_SIZE32(plen); 6567 if (offset >= limit) { 6568 break; 6569 } 6570 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6571 sizeof(param_buf)); 6572 } 6573 /* Now check to see if we need to purge any addresses */ 6574 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6575 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6576 SCTP_ADDR_NOT_IN_ASSOC) { 6577 /* This address has been removed from the asoc */ 6578 /* remove and free it */ 6579 stcb->asoc.numnets--; 6580 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6581 sctp_free_remote_addr(net); 6582 if (net == stcb->asoc.primary_destination) { 6583 stcb->asoc.primary_destination = NULL; 6584 sctp_select_primary_destination(stcb); 6585 } 6586 } 6587 } 6588 if ((stcb->asoc.ecn_supported == 1) && 6589 (peer_supports_ecn == 0)) { 6590 stcb->asoc.ecn_supported = 0; 6591 } 6592 if ((stcb->asoc.prsctp_supported == 1) && 6593 (peer_supports_prsctp == 0)) { 6594 stcb->asoc.prsctp_supported = 0; 6595 } 6596 if ((stcb->asoc.auth_supported == 1) && 6597 ((peer_supports_auth == 0) || 6598 (got_random == 0) || (got_hmacs == 0))) { 6599 stcb->asoc.auth_supported = 0; 6600 } 6601 if ((stcb->asoc.asconf_supported == 1) && 6602 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6603 (stcb->asoc.auth_supported == 0) || 6604 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6605 stcb->asoc.asconf_supported = 0; 6606 } 6607 if ((stcb->asoc.reconfig_supported == 1) && 6608 (peer_supports_reconfig == 0)) { 6609 stcb->asoc.reconfig_supported = 0; 6610 } 6611 if ((stcb->asoc.idata_supported == 1) && 6612 (peer_supports_idata == 0)) { 6613 stcb->asoc.idata_supported = 0; 6614 } 6615 if ((stcb->asoc.nrsack_supported == 1) && 6616 (peer_supports_nrsack == 0)) { 6617 stcb->asoc.nrsack_supported = 0; 6618 } 6619 if ((stcb->asoc.pktdrop_supported == 1) && 6620 (peer_supports_pktdrop == 0)) { 6621 stcb->asoc.pktdrop_supported = 0; 6622 } 6623 /* validate authentication required parameters */ 6624 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6625 /* peer does not support auth but sent a chunks list? */ 6626 return (-31); 6627 } 6628 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6629 /* peer supports asconf but not auth? */ 6630 return (-32); 6631 } else if ((peer_supports_asconf == 1) && 6632 (peer_supports_auth == 1) && 6633 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6634 return (-33); 6635 } 6636 /* concatenate the full random key */ 6637 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6638 if (chunks != NULL) { 6639 keylen += sizeof(*chunks) + num_chunks; 6640 } 6641 new_key = sctp_alloc_key(keylen); 6642 if (new_key != NULL) { 6643 /* copy in the RANDOM */ 6644 if (p_random != NULL) { 6645 keylen = sizeof(*p_random) + random_len; 6646 memcpy(new_key->key, p_random, keylen); 6647 } else { 6648 keylen = 0; 6649 } 6650 /* append in the AUTH chunks */ 6651 if (chunks != NULL) { 6652 memcpy(new_key->key + keylen, chunks, 6653 sizeof(*chunks) + num_chunks); 6654 keylen += sizeof(*chunks) + num_chunks; 6655 } 6656 /* append in the HMACs */ 6657 if (hmacs != NULL) { 6658 memcpy(new_key->key + keylen, hmacs, 6659 sizeof(*hmacs) + hmacs_len); 6660 } 6661 } else { 6662 /* failed to get memory for the key */ 6663 return (-34); 6664 } 6665 if (stcb->asoc.authinfo.peer_random != NULL) 6666 sctp_free_key(stcb->asoc.authinfo.peer_random); 6667 stcb->asoc.authinfo.peer_random = new_key; 6668 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6669 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6670 6671 return (0); 6672 } 6673 6674 int 6675 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6676 struct sctp_nets *net) 6677 { 6678 /* make sure the requested primary address exists in the assoc */ 6679 if (net == NULL && sa) 6680 net = sctp_findnet(stcb, sa); 6681 6682 if (net == NULL) { 6683 /* didn't find the requested primary address! */ 6684 return (-1); 6685 } else { 6686 /* set the primary address */ 6687 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6688 /* Must be confirmed, so queue to set */ 6689 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6690 return (0); 6691 } 6692 stcb->asoc.primary_destination = net; 6693 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6694 sctp_free_remote_addr(stcb->asoc.alternate); 6695 stcb->asoc.alternate = NULL; 6696 } 6697 net = TAILQ_FIRST(&stcb->asoc.nets); 6698 if (net != stcb->asoc.primary_destination) { 6699 /* 6700 * first one on the list is NOT the primary 6701 * sctp_cmpaddr() is much more efficient if the 6702 * primary is the first on the list, make it so. 6703 */ 6704 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6705 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6706 } 6707 return (0); 6708 } 6709 } 6710 6711 int 6712 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6713 { 6714 /* 6715 * This function serves two purposes. It will see if a TAG can be 6716 * re-used and return 1 for yes it is ok and 0 for don't use that 6717 * tag. A secondary function it will do is purge out old tags that 6718 * can be removed. 6719 */ 6720 struct sctpvtaghead *chain; 6721 struct sctp_tagblock *twait_block; 6722 struct sctpasochead *head; 6723 struct sctp_tcb *stcb; 6724 int i; 6725 6726 SCTP_INP_INFO_RLOCK(); 6727 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6728 SCTP_BASE_INFO(hashasocmark))]; 6729 LIST_FOREACH(stcb, head, sctp_asocs) { 6730 /* 6731 * We choose not to lock anything here. TCB's can't be 6732 * removed since we have the read lock, so they can't be 6733 * freed on us, same thing for the INP. I may be wrong with 6734 * this assumption, but we will go with it for now :-) 6735 */ 6736 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6737 continue; 6738 } 6739 if (stcb->asoc.my_vtag == tag) { 6740 /* candidate */ 6741 if (stcb->rport != rport) { 6742 continue; 6743 } 6744 if (stcb->sctp_ep->sctp_lport != lport) { 6745 continue; 6746 } 6747 /* Its a used tag set */ 6748 SCTP_INP_INFO_RUNLOCK(); 6749 return (0); 6750 } 6751 } 6752 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6753 /* Now what about timed wait ? */ 6754 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6755 /* 6756 * Block(s) are present, lets see if we have this tag in the 6757 * list 6758 */ 6759 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6760 if (twait_block->vtag_block[i].v_tag == 0) { 6761 /* not used */ 6762 continue; 6763 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6764 now->tv_sec) { 6765 /* Audit expires this guy */ 6766 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6767 twait_block->vtag_block[i].v_tag = 0; 6768 twait_block->vtag_block[i].lport = 0; 6769 twait_block->vtag_block[i].rport = 0; 6770 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6771 (twait_block->vtag_block[i].lport == lport) && 6772 (twait_block->vtag_block[i].rport == rport)) { 6773 /* Bad tag, sorry :< */ 6774 SCTP_INP_INFO_RUNLOCK(); 6775 return (0); 6776 } 6777 } 6778 } 6779 SCTP_INP_INFO_RUNLOCK(); 6780 return (1); 6781 } 6782 6783 static void 6784 sctp_drain_mbufs(struct sctp_tcb *stcb) 6785 { 6786 /* 6787 * We must hunt this association for MBUF's past the cumack (i.e. 6788 * out of order data that we can renege on). 6789 */ 6790 struct sctp_association *asoc; 6791 struct sctp_tmit_chunk *chk, *nchk; 6792 uint32_t cumulative_tsn_p1; 6793 struct sctp_queued_to_read *control, *ncontrol; 6794 int cnt, strmat; 6795 uint32_t gap, i; 6796 int fnd = 0; 6797 6798 /* We look for anything larger than the cum-ack + 1 */ 6799 6800 asoc = &stcb->asoc; 6801 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6802 /* none we can reneg on. */ 6803 return; 6804 } 6805 SCTP_STAT_INCR(sctps_protocol_drains_done); 6806 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6807 cnt = 0; 6808 /* Ok that was fun, now we will drain all the inbound streams? */ 6809 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6810 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6811 #ifdef INVARIANTS 6812 if (control->on_strm_q != SCTP_ON_ORDERED) { 6813 panic("Huh control: %p on_q: %d -- not ordered?", 6814 control, control->on_strm_q); 6815 } 6816 #endif 6817 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6818 /* Yep it is above cum-ack */ 6819 cnt++; 6820 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6821 KASSERT(control->length > 0, ("control has zero length")); 6822 if (asoc->size_on_all_streams >= control->length) { 6823 asoc->size_on_all_streams -= control->length; 6824 } else { 6825 #ifdef INVARIANTS 6826 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6827 #else 6828 asoc->size_on_all_streams = 0; 6829 #endif 6830 } 6831 sctp_ucount_decr(asoc->cnt_on_all_streams); 6832 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6833 if (control->on_read_q) { 6834 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6835 control->on_read_q = 0; 6836 } 6837 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6838 control->on_strm_q = 0; 6839 if (control->data) { 6840 sctp_m_freem(control->data); 6841 control->data = NULL; 6842 } 6843 sctp_free_remote_addr(control->whoFrom); 6844 /* Now its reasm? */ 6845 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6846 cnt++; 6847 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6848 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6849 if (asoc->size_on_reasm_queue >= chk->send_size) { 6850 asoc->size_on_reasm_queue -= chk->send_size; 6851 } else { 6852 #ifdef INVARIANTS 6853 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6854 #else 6855 asoc->size_on_reasm_queue = 0; 6856 #endif 6857 } 6858 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6859 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6860 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6861 if (chk->data) { 6862 sctp_m_freem(chk->data); 6863 chk->data = NULL; 6864 } 6865 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6866 } 6867 sctp_free_a_readq(stcb, control); 6868 } 6869 } 6870 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6871 #ifdef INVARIANTS 6872 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6873 panic("Huh control: %p on_q: %d -- not unordered?", 6874 control, control->on_strm_q); 6875 } 6876 #endif 6877 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6878 /* Yep it is above cum-ack */ 6879 cnt++; 6880 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6881 KASSERT(control->length > 0, ("control has zero length")); 6882 if (asoc->size_on_all_streams >= control->length) { 6883 asoc->size_on_all_streams -= control->length; 6884 } else { 6885 #ifdef INVARIANTS 6886 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6887 #else 6888 asoc->size_on_all_streams = 0; 6889 #endif 6890 } 6891 sctp_ucount_decr(asoc->cnt_on_all_streams); 6892 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6893 if (control->on_read_q) { 6894 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6895 control->on_read_q = 0; 6896 } 6897 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6898 control->on_strm_q = 0; 6899 if (control->data) { 6900 sctp_m_freem(control->data); 6901 control->data = NULL; 6902 } 6903 sctp_free_remote_addr(control->whoFrom); 6904 /* Now its reasm? */ 6905 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6906 cnt++; 6907 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6908 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6909 if (asoc->size_on_reasm_queue >= chk->send_size) { 6910 asoc->size_on_reasm_queue -= chk->send_size; 6911 } else { 6912 #ifdef INVARIANTS 6913 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6914 #else 6915 asoc->size_on_reasm_queue = 0; 6916 #endif 6917 } 6918 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6919 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6920 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6921 if (chk->data) { 6922 sctp_m_freem(chk->data); 6923 chk->data = NULL; 6924 } 6925 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6926 } 6927 sctp_free_a_readq(stcb, control); 6928 } 6929 } 6930 } 6931 if (cnt) { 6932 /* We must back down to see what the new highest is */ 6933 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6934 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6935 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6936 asoc->highest_tsn_inside_map = i; 6937 fnd = 1; 6938 break; 6939 } 6940 } 6941 if (!fnd) { 6942 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6943 } 6944 6945 /* 6946 * Question, should we go through the delivery queue? The 6947 * only reason things are on here is the app not reading OR 6948 * a p-d-api up. An attacker COULD send enough in to 6949 * initiate the PD-API and then send a bunch of stuff to 6950 * other streams... these would wind up on the delivery 6951 * queue.. and then we would not get to them. But in order 6952 * to do this I then have to back-track and un-deliver 6953 * sequence numbers in streams.. el-yucko. I think for now 6954 * we will NOT look at the delivery queue and leave it to be 6955 * something to consider later. An alternative would be to 6956 * abort the P-D-API with a notification and then deliver 6957 * the data.... Or another method might be to keep track of 6958 * how many times the situation occurs and if we see a 6959 * possible attack underway just abort the association. 6960 */ 6961 #ifdef SCTP_DEBUG 6962 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6963 #endif 6964 /* 6965 * Now do we need to find a new 6966 * asoc->highest_tsn_inside_map? 6967 */ 6968 asoc->last_revoke_count = cnt; 6969 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6970 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 6971 /* sa_ignore NO_NULL_CHK */ 6972 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6973 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6974 } 6975 /* 6976 * Another issue, in un-setting the TSN's in the mapping array we 6977 * DID NOT adjust the highest_tsn marker. This will cause one of 6978 * two things to occur. It may cause us to do extra work in checking 6979 * for our mapping array movement. More importantly it may cause us 6980 * to SACK every datagram. This may not be a bad thing though since 6981 * we will recover once we get our cum-ack above and all this stuff 6982 * we dumped recovered. 6983 */ 6984 } 6985 6986 void 6987 sctp_drain() 6988 { 6989 /* 6990 * We must walk the PCB lists for ALL associations here. The system 6991 * is LOW on MBUF's and needs help. This is where reneging will 6992 * occur. We really hope this does NOT happen! 6993 */ 6994 VNET_ITERATOR_DECL(vnet_iter); 6995 VNET_LIST_RLOCK_NOSLEEP(); 6996 VNET_FOREACH(vnet_iter) { 6997 CURVNET_SET(vnet_iter); 6998 struct sctp_inpcb *inp; 6999 struct sctp_tcb *stcb; 7000 7001 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7002 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7003 #ifdef VIMAGE 7004 continue; 7005 #else 7006 return; 7007 #endif 7008 } 7009 SCTP_INP_INFO_RLOCK(); 7010 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7011 /* For each endpoint */ 7012 SCTP_INP_RLOCK(inp); 7013 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7014 /* For each association */ 7015 SCTP_TCB_LOCK(stcb); 7016 sctp_drain_mbufs(stcb); 7017 SCTP_TCB_UNLOCK(stcb); 7018 } 7019 SCTP_INP_RUNLOCK(inp); 7020 } 7021 SCTP_INP_INFO_RUNLOCK(); 7022 CURVNET_RESTORE(); 7023 } 7024 VNET_LIST_RUNLOCK_NOSLEEP(); 7025 } 7026 7027 /* 7028 * start a new iterator 7029 * iterates through all endpoints and associations based on the pcb_state 7030 * flags and asoc_state. "af" (mandatory) is executed for all matching 7031 * assocs and "ef" (optional) is executed when the iterator completes. 7032 * "inpf" (optional) is executed for each new endpoint as it is being 7033 * iterated through. inpe (optional) is called when the inp completes 7034 * its way through all the stcbs. 7035 */ 7036 int 7037 sctp_initiate_iterator(inp_func inpf, 7038 asoc_func af, 7039 inp_func inpe, 7040 uint32_t pcb_state, 7041 uint32_t pcb_features, 7042 uint32_t asoc_state, 7043 void *argp, 7044 uint32_t argi, 7045 end_func ef, 7046 struct sctp_inpcb *s_inp, 7047 uint8_t chunk_output_off) 7048 { 7049 struct sctp_iterator *it = NULL; 7050 7051 if (af == NULL) { 7052 return (-1); 7053 } 7054 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7055 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7056 SCTP_BASE_VAR(sctp_pcb_initialized)); 7057 return (-1); 7058 } 7059 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7060 SCTP_M_ITER); 7061 if (it == NULL) { 7062 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7063 return (-1); 7064 } 7065 memset(it, 0, sizeof(*it)); 7066 it->function_assoc = af; 7067 it->function_inp = inpf; 7068 if (inpf) 7069 it->done_current_ep = 0; 7070 else 7071 it->done_current_ep = 1; 7072 it->function_atend = ef; 7073 it->pointer = argp; 7074 it->val = argi; 7075 it->pcb_flags = pcb_state; 7076 it->pcb_features = pcb_features; 7077 it->asoc_state = asoc_state; 7078 it->function_inp_end = inpe; 7079 it->no_chunk_output = chunk_output_off; 7080 it->vn = curvnet; 7081 if (s_inp) { 7082 /* Assume lock is held here */ 7083 it->inp = s_inp; 7084 SCTP_INP_INCR_REF(it->inp); 7085 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7086 } else { 7087 SCTP_INP_INFO_RLOCK(); 7088 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7089 if (it->inp) { 7090 SCTP_INP_INCR_REF(it->inp); 7091 } 7092 SCTP_INP_INFO_RUNLOCK(); 7093 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7094 7095 } 7096 SCTP_IPI_ITERATOR_WQ_LOCK(); 7097 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7098 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7099 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7100 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7101 SCTP_FREE(it, SCTP_M_ITER); 7102 return (-1); 7103 } 7104 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7105 if (sctp_it_ctl.iterator_running == 0) { 7106 sctp_wakeup_iterator(); 7107 } 7108 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7109 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7110 return (0); 7111 } 7112