1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 5 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 6 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * a) Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 14 * b) Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the distribution. 17 * 18 * c) Neither the name of Cisco Systems, Inc. nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #include <sys/proc.h> 40 #include <netinet/sctp_var.h> 41 #include <netinet/sctp_sysctl.h> 42 #include <netinet/sctp_pcb.h> 43 #include <netinet/sctputil.h> 44 #include <netinet/sctp.h> 45 #include <netinet/sctp_header.h> 46 #include <netinet/sctp_asconf.h> 47 #include <netinet/sctp_output.h> 48 #include <netinet/sctp_timer.h> 49 #include <netinet/sctp_bsd_addr.h> 50 #if defined(INET) || defined(INET6) 51 #include <netinet/udp.h> 52 #endif 53 #ifdef INET6 54 #include <netinet6/ip6_var.h> 55 #endif 56 #include <sys/sched.h> 57 #include <sys/smp.h> 58 #include <sys/unistd.h> 59 60 61 VNET_DEFINE(struct sctp_base_info, system_base_info); 62 63 /* FIX: we don't handle multiple link local scopes */ 64 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 65 #ifdef INET6 66 int 67 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 68 { 69 struct sockaddr_in6 tmp_a, tmp_b; 70 71 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 72 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 73 return (0); 74 } 75 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 76 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 77 return (0); 78 } 79 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 80 } 81 #endif 82 83 void 84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85 { 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 SCTP_INP_INFO_RUNLOCK(); 100 } 101 102 /*- 103 * Addresses are added to VRF's (Virtual Router's). For BSD we 104 * have only the default VRF 0. We maintain a hash list of 105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 106 * these has a list of addresses. When we add a new address 107 * to a VRF we lookup the ifn/ifn_index, if the ifn does 108 * not exist we create it and add it to the list of IFN's 109 * within the VRF. Once we have the sctp_ifn, we add the 110 * address to the list. So we look something like: 111 * 112 * hash-vrf-table 113 * vrf-> ifn-> ifn -> ifn 114 * vrf | 115 * ... +--ifa-> ifa -> ifa 116 * vrf 117 * 118 * We keep these separate lists since the SCTP subsystem will 119 * point to these from its source address selection nets structure. 120 * When an address is deleted it does not happen right away on 121 * the SCTP side, it gets scheduled. What we do when a 122 * delete happens is immediately remove the address from 123 * the master list and decrement the refcount. As our 124 * addip iterator works through and frees the src address 125 * selection pointing to the sctp_ifa, eventually the refcount 126 * will reach 0 and we will delete it. Note that it is assumed 127 * that any locking on system level ifn/ifa is done at the 128 * caller of these functions and these routines will only 129 * lock the SCTP structures as they add or delete things. 130 * 131 * Other notes on VRF concepts. 132 * - An endpoint can be in multiple VRF's 133 * - An association lives within a VRF and only one VRF. 134 * - Any incoming packet we can deduce the VRF for by 135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 136 * - Any downward send call or connect call must supply the 137 * VRF via ancillary data or via some sort of set default 138 * VRF socket option call (again for BSD no brainer since 139 * the VRF is always 0). 140 * - An endpoint may add multiple VRF's to it. 141 * - Listening sockets can accept associations in any 142 * of the VRF's they are in but the assoc will end up 143 * in only one VRF (gotten from the packet or connect/send). 144 * 145 */ 146 147 struct sctp_vrf * 148 sctp_allocate_vrf(int vrf_id) 149 { 150 struct sctp_vrf *vrf = NULL; 151 struct sctp_vrflist *bucket; 152 153 /* First allocate the VRF structure */ 154 vrf = sctp_find_vrf(vrf_id); 155 if (vrf) { 156 /* Already allocated */ 157 return (vrf); 158 } 159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 160 SCTP_M_VRF); 161 if (vrf == NULL) { 162 /* No memory */ 163 #ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165 #endif 166 return (NULL); 167 } 168 /* setup the VRF */ 169 memset(vrf, 0, sizeof(struct sctp_vrf)); 170 vrf->vrf_id = vrf_id; 171 LIST_INIT(&vrf->ifnlist); 172 vrf->total_ifa_count = 0; 173 vrf->refcount = 0; 174 /* now also setup table ids */ 175 SCTP_INIT_VRF_TABLEID(vrf); 176 /* Init the HASH of addresses */ 177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 178 &vrf->vrf_addr_hashmark); 179 if (vrf->vrf_addr_hash == NULL) { 180 /* No memory */ 181 #ifdef INVARIANTS 182 panic("No memory for VRF:%d", vrf_id); 183 #endif 184 SCTP_FREE(vrf, SCTP_M_VRF); 185 return (NULL); 186 } 187 188 /* Add it to the hash table */ 189 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 190 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 191 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 192 return (vrf); 193 } 194 195 196 struct sctp_ifn * 197 sctp_find_ifn(void *ifn, uint32_t ifn_index) 198 { 199 struct sctp_ifn *sctp_ifnp; 200 struct sctp_ifnlist *hash_ifn_head; 201 202 /* 203 * We assume the lock is held for the addresses if that's wrong 204 * problems could occur :-) 205 */ 206 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 207 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 208 if (sctp_ifnp->ifn_index == ifn_index) { 209 return (sctp_ifnp); 210 } 211 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 212 return (sctp_ifnp); 213 } 214 } 215 return (NULL); 216 } 217 218 219 struct sctp_vrf * 220 sctp_find_vrf(uint32_t vrf_id) 221 { 222 struct sctp_vrflist *bucket; 223 struct sctp_vrf *liste; 224 225 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 226 LIST_FOREACH(liste, bucket, next_vrf) { 227 if (vrf_id == liste->vrf_id) { 228 return (liste); 229 } 230 } 231 return (NULL); 232 } 233 234 235 void 236 sctp_free_vrf(struct sctp_vrf *vrf) 237 { 238 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 239 if (vrf->vrf_addr_hash) { 240 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 241 vrf->vrf_addr_hash = NULL; 242 } 243 /* We zero'd the count */ 244 LIST_REMOVE(vrf, next_vrf); 245 SCTP_FREE(vrf, SCTP_M_VRF); 246 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 247 } 248 } 249 250 251 void 252 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 253 { 254 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 255 /* We zero'd the count */ 256 if (sctp_ifnp->vrf) { 257 sctp_free_vrf(sctp_ifnp->vrf); 258 } 259 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 260 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 261 } 262 } 263 264 265 void 266 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 267 { 268 struct sctp_ifn *sctp_ifnp; 269 270 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 271 if (sctp_ifnp != NULL) { 272 sctp_ifnp->ifn_mtu = mtu; 273 } 274 } 275 276 277 void 278 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 279 { 280 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 281 /* We zero'd the count */ 282 if (sctp_ifap->ifn_p) { 283 sctp_free_ifn(sctp_ifap->ifn_p); 284 } 285 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 286 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 287 } 288 } 289 290 291 static void 292 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 293 { 294 struct sctp_ifn *found; 295 296 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 297 if (found == NULL) { 298 /* Not in the list.. sorry */ 299 return; 300 } 301 if (hold_addr_lock == 0) 302 SCTP_IPI_ADDR_WLOCK(); 303 LIST_REMOVE(sctp_ifnp, next_bucket); 304 LIST_REMOVE(sctp_ifnp, next_ifn); 305 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 306 sctp_ifnp->registered_af); 307 if (hold_addr_lock == 0) 308 SCTP_IPI_ADDR_WUNLOCK(); 309 /* Take away the reference, and possibly free it */ 310 sctp_free_ifn(sctp_ifnp); 311 } 312 313 314 void 315 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 316 const char *if_name, uint32_t ifn_index) 317 { 318 struct sctp_vrf *vrf; 319 struct sctp_ifa *sctp_ifap; 320 321 SCTP_IPI_ADDR_RLOCK(); 322 vrf = sctp_find_vrf(vrf_id); 323 if (vrf == NULL) { 324 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 325 goto out; 326 327 } 328 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 329 if (sctp_ifap == NULL) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 331 goto out; 332 } 333 if (sctp_ifap->ifn_p == NULL) { 334 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 335 goto out; 336 } 337 if (if_name) { 338 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 339 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 340 sctp_ifap->ifn_p->ifn_name, if_name); 341 goto out; 342 } 343 } else { 344 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 345 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 346 sctp_ifap->ifn_p->ifn_index, ifn_index); 347 goto out; 348 } 349 } 350 351 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 352 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 353 out: 354 SCTP_IPI_ADDR_RUNLOCK(); 355 } 356 357 358 void 359 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 360 const char *if_name, uint32_t ifn_index) 361 { 362 struct sctp_vrf *vrf; 363 struct sctp_ifa *sctp_ifap; 364 365 SCTP_IPI_ADDR_RLOCK(); 366 vrf = sctp_find_vrf(vrf_id); 367 if (vrf == NULL) { 368 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 369 goto out; 370 371 } 372 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 373 if (sctp_ifap == NULL) { 374 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 375 goto out; 376 } 377 if (sctp_ifap->ifn_p == NULL) { 378 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 379 goto out; 380 } 381 if (if_name) { 382 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 383 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 384 sctp_ifap->ifn_p->ifn_name, if_name); 385 goto out; 386 } 387 } else { 388 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 389 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 390 sctp_ifap->ifn_p->ifn_index, ifn_index); 391 goto out; 392 } 393 } 394 395 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 396 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 397 out: 398 SCTP_IPI_ADDR_RUNLOCK(); 399 } 400 401 402 /*- 403 * Add an ifa to an ifn. 404 * Register the interface as necessary. 405 * NOTE: ADDR write lock MUST be held. 406 */ 407 static void 408 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 409 { 410 int ifa_af; 411 412 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 413 sctp_ifap->ifn_p = sctp_ifnp; 414 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 415 /* update address counts */ 416 sctp_ifnp->ifa_count++; 417 ifa_af = sctp_ifap->address.sa.sa_family; 418 switch (ifa_af) { 419 #ifdef INET 420 case AF_INET: 421 sctp_ifnp->num_v4++; 422 break; 423 #endif 424 #ifdef INET6 425 case AF_INET6: 426 sctp_ifnp->num_v6++; 427 break; 428 #endif 429 default: 430 break; 431 } 432 if (sctp_ifnp->ifa_count == 1) { 433 /* register the new interface */ 434 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 435 sctp_ifnp->registered_af = ifa_af; 436 } 437 } 438 439 440 /*- 441 * Remove an ifa from its ifn. 442 * If no more addresses exist, remove the ifn too. Otherwise, re-register 443 * the interface based on the remaining address families left. 444 * NOTE: ADDR write lock MUST be held. 445 */ 446 static void 447 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 448 { 449 LIST_REMOVE(sctp_ifap, next_ifa); 450 if (sctp_ifap->ifn_p) { 451 /* update address counts */ 452 sctp_ifap->ifn_p->ifa_count--; 453 switch (sctp_ifap->address.sa.sa_family) { 454 #ifdef INET 455 case AF_INET: 456 sctp_ifap->ifn_p->num_v4--; 457 break; 458 #endif 459 #ifdef INET6 460 case AF_INET6: 461 sctp_ifap->ifn_p->num_v6--; 462 break; 463 #endif 464 default: 465 break; 466 } 467 468 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 469 /* remove the ifn, possibly freeing it */ 470 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 471 } else { 472 /* re-register address family type, if needed */ 473 if ((sctp_ifap->ifn_p->num_v6 == 0) && 474 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 475 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 476 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 477 sctp_ifap->ifn_p->registered_af = AF_INET; 478 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 479 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 480 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 481 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 482 sctp_ifap->ifn_p->registered_af = AF_INET6; 483 } 484 /* free the ifn refcount */ 485 sctp_free_ifn(sctp_ifap->ifn_p); 486 } 487 sctp_ifap->ifn_p = NULL; 488 } 489 } 490 491 492 struct sctp_ifa * 493 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 494 uint32_t ifn_type, const char *if_name, void *ifa, 495 struct sockaddr *addr, uint32_t ifa_flags, 496 int dynamic_add) 497 { 498 struct sctp_vrf *vrf; 499 struct sctp_ifn *sctp_ifnp = NULL; 500 struct sctp_ifa *sctp_ifap = NULL; 501 struct sctp_ifalist *hash_addr_head; 502 struct sctp_ifnlist *hash_ifn_head; 503 uint32_t hash_of_addr; 504 int new_ifn_af = 0; 505 506 #ifdef SCTP_DEBUG 507 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 508 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 509 #endif 510 SCTP_IPI_ADDR_WLOCK(); 511 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 512 if (sctp_ifnp) { 513 vrf = sctp_ifnp->vrf; 514 } else { 515 vrf = sctp_find_vrf(vrf_id); 516 if (vrf == NULL) { 517 vrf = sctp_allocate_vrf(vrf_id); 518 if (vrf == NULL) { 519 SCTP_IPI_ADDR_WUNLOCK(); 520 return (NULL); 521 } 522 } 523 } 524 if (sctp_ifnp == NULL) { 525 /* 526 * build one and add it, can't hold lock until after malloc 527 * done though. 528 */ 529 SCTP_IPI_ADDR_WUNLOCK(); 530 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 531 sizeof(struct sctp_ifn), SCTP_M_IFN); 532 if (sctp_ifnp == NULL) { 533 #ifdef INVARIANTS 534 panic("No memory for IFN"); 535 #endif 536 return (NULL); 537 } 538 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 539 sctp_ifnp->ifn_index = ifn_index; 540 sctp_ifnp->ifn_p = ifn; 541 sctp_ifnp->ifn_type = ifn_type; 542 sctp_ifnp->refcount = 0; 543 sctp_ifnp->vrf = vrf; 544 atomic_add_int(&vrf->refcount, 1); 545 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 546 if (if_name != NULL) { 547 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 548 } else { 549 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 550 } 551 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 552 LIST_INIT(&sctp_ifnp->ifalist); 553 SCTP_IPI_ADDR_WLOCK(); 554 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 555 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 556 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 557 new_ifn_af = 1; 558 } 559 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 560 if (sctp_ifap) { 561 /* Hmm, it already exists? */ 562 if ((sctp_ifap->ifn_p) && 563 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 564 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 565 sctp_ifap->ifn_p->ifn_name, ifn_index, 566 (void *)sctp_ifap); 567 if (new_ifn_af) { 568 /* Remove the created one that we don't want */ 569 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 570 } 571 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 572 /* easy to solve, just switch back to active */ 573 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 574 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 575 sctp_ifap->ifn_p = sctp_ifnp; 576 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 577 } 578 exit_stage_left: 579 SCTP_IPI_ADDR_WUNLOCK(); 580 return (sctp_ifap); 581 } else { 582 if (sctp_ifap->ifn_p) { 583 /* 584 * The last IFN gets the address, remove the 585 * old one 586 */ 587 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 588 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 589 sctp_ifap->ifn_p->ifn_index, if_name, 590 ifn_index); 591 /* remove the address from the old ifn */ 592 sctp_remove_ifa_from_ifn(sctp_ifap); 593 /* move the address over to the new ifn */ 594 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 595 goto exit_stage_left; 596 } else { 597 /* repair ifnp which was NULL ? */ 598 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 599 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 600 (void *)sctp_ifnp, (void *)sctp_ifap); 601 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 602 } 603 goto exit_stage_left; 604 } 605 } 606 SCTP_IPI_ADDR_WUNLOCK(); 607 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 608 if (sctp_ifap == NULL) { 609 #ifdef INVARIANTS 610 panic("No memory for IFA"); 611 #endif 612 return (NULL); 613 } 614 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 615 sctp_ifap->ifn_p = sctp_ifnp; 616 atomic_add_int(&sctp_ifnp->refcount, 1); 617 sctp_ifap->vrf_id = vrf_id; 618 sctp_ifap->ifa = ifa; 619 memcpy(&sctp_ifap->address, addr, addr->sa_len); 620 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 621 sctp_ifap->flags = ifa_flags; 622 /* Set scope */ 623 switch (sctp_ifap->address.sa.sa_family) { 624 #ifdef INET 625 case AF_INET: 626 { 627 struct sockaddr_in *sin; 628 629 sin = &sctp_ifap->address.sin; 630 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 631 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 632 sctp_ifap->src_is_loop = 1; 633 } 634 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 635 sctp_ifap->src_is_priv = 1; 636 } 637 sctp_ifnp->num_v4++; 638 if (new_ifn_af) 639 new_ifn_af = AF_INET; 640 break; 641 } 642 #endif 643 #ifdef INET6 644 case AF_INET6: 645 { 646 /* ok to use deprecated addresses? */ 647 struct sockaddr_in6 *sin6; 648 649 sin6 = &sctp_ifap->address.sin6; 650 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 651 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 652 sctp_ifap->src_is_loop = 1; 653 } 654 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 655 sctp_ifap->src_is_priv = 1; 656 } 657 sctp_ifnp->num_v6++; 658 if (new_ifn_af) 659 new_ifn_af = AF_INET6; 660 break; 661 } 662 #endif 663 default: 664 new_ifn_af = 0; 665 break; 666 } 667 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 668 669 if ((sctp_ifap->src_is_priv == 0) && 670 (sctp_ifap->src_is_loop == 0)) { 671 sctp_ifap->src_is_glob = 1; 672 } 673 SCTP_IPI_ADDR_WLOCK(); 674 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 675 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 676 sctp_ifap->refcount = 1; 677 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 678 sctp_ifnp->ifa_count++; 679 vrf->total_ifa_count++; 680 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 681 if (new_ifn_af) { 682 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 683 sctp_ifnp->registered_af = new_ifn_af; 684 } 685 SCTP_IPI_ADDR_WUNLOCK(); 686 if (dynamic_add) { 687 /* 688 * Bump up the refcount so that when the timer completes it 689 * will drop back down. 690 */ 691 struct sctp_laddr *wi; 692 693 atomic_add_int(&sctp_ifap->refcount, 1); 694 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 695 if (wi == NULL) { 696 /* 697 * Gak, what can we do? We have lost an address 698 * change can you say HOSED? 699 */ 700 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 701 /* Opps, must decrement the count */ 702 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 703 if_name); 704 return (NULL); 705 } 706 SCTP_INCR_LADDR_COUNT(); 707 memset(wi, 0, sizeof(*wi)); 708 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 709 wi->ifa = sctp_ifap; 710 wi->action = SCTP_ADD_IP_ADDRESS; 711 712 SCTP_WQ_ADDR_LOCK(); 713 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 714 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 715 (struct sctp_inpcb *)NULL, 716 (struct sctp_tcb *)NULL, 717 (struct sctp_nets *)NULL); 718 SCTP_WQ_ADDR_UNLOCK(); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724 } 725 726 void 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729 { 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739 740 #ifdef SCTP_DEBUG 741 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 742 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 743 #endif 744 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 745 if (sctp_ifap) { 746 /* Validate the delete */ 747 if (sctp_ifap->ifn_p) { 748 int valid = 0; 749 750 /*- 751 * The name has priority over the ifn_index 752 * if its given. We do this especially for 753 * panda who might recycle indexes fast. 754 */ 755 if (if_name) { 756 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 757 /* They match its a correct delete */ 758 valid = 1; 759 } 760 } 761 if (!valid) { 762 /* last ditch check ifn_index */ 763 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 764 valid = 1; 765 } 766 } 767 if (!valid) { 768 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 769 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 770 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 771 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 772 SCTP_IPI_ADDR_WUNLOCK(); 773 return; 774 } 775 } 776 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 777 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 778 /* 779 * We don't set the flag. This means that the structure will 780 * hang around in EP's that have bound specific to it until 781 * they close. This gives us TCP like behavior if someone 782 * removes an address (or for that matter adds it right 783 * back). 784 */ 785 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 786 vrf->total_ifa_count--; 787 LIST_REMOVE(sctp_ifap, next_bucket); 788 sctp_remove_ifa_from_ifn(sctp_ifap); 789 } 790 #ifdef SCTP_DEBUG 791 else { 792 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 793 ifn_index); 794 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 795 } 796 #endif 797 798 out_now: 799 SCTP_IPI_ADDR_WUNLOCK(); 800 if (sctp_ifap) { 801 struct sctp_laddr *wi; 802 803 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 804 if (wi == NULL) { 805 /* 806 * Gak, what can we do? We have lost an address 807 * change can you say HOSED? 808 */ 809 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 810 811 /* Oops, must decrement the count */ 812 sctp_free_ifa(sctp_ifap); 813 return; 814 } 815 SCTP_INCR_LADDR_COUNT(); 816 memset(wi, 0, sizeof(*wi)); 817 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 818 wi->ifa = sctp_ifap; 819 wi->action = SCTP_DEL_IP_ADDRESS; 820 SCTP_WQ_ADDR_LOCK(); 821 /* 822 * Should this really be a tailq? As it is we will process 823 * the newest first :-0 824 */ 825 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 826 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 827 (struct sctp_inpcb *)NULL, 828 (struct sctp_tcb *)NULL, 829 (struct sctp_nets *)NULL); 830 SCTP_WQ_ADDR_UNLOCK(); 831 } 832 return; 833 } 834 835 836 static int 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 838 { 839 int loopback_scope; 840 #if defined(INET) 841 int ipv4_local_scope, ipv4_addr_legal; 842 #endif 843 #if defined(INET6) 844 int local_scope, site_scope, ipv6_addr_legal; 845 #endif 846 struct sctp_vrf *vrf; 847 struct sctp_ifn *sctp_ifn; 848 struct sctp_ifa *sctp_ifa; 849 850 loopback_scope = stcb->asoc.scope.loopback_scope; 851 #if defined(INET) 852 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 853 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 854 #endif 855 #if defined(INET6) 856 local_scope = stcb->asoc.scope.local_scope; 857 site_scope = stcb->asoc.scope.site_scope; 858 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 859 #endif 860 861 SCTP_IPI_ADDR_RLOCK(); 862 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 863 if (vrf == NULL) { 864 /* no vrf, no addresses */ 865 SCTP_IPI_ADDR_RUNLOCK(); 866 return (0); 867 } 868 869 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 870 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 871 if ((loopback_scope == 0) && 872 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 873 continue; 874 } 875 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 876 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 877 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 878 /* 879 * We allow pending addresses, where 880 * we have sent an asconf-add to be 881 * considered valid. 882 */ 883 continue; 884 } 885 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 886 continue; 887 } 888 switch (sctp_ifa->address.sa.sa_family) { 889 #ifdef INET 890 case AF_INET: 891 if (ipv4_addr_legal) { 892 struct sockaddr_in *sin, 893 *rsin; 894 895 sin = &sctp_ifa->address.sin; 896 rsin = (struct sockaddr_in *)to; 897 if ((ipv4_local_scope == 0) && 898 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 899 continue; 900 } 901 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 902 &sin->sin_addr) != 0) { 903 continue; 904 } 905 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 906 SCTP_IPI_ADDR_RUNLOCK(); 907 return (1); 908 } 909 } 910 break; 911 #endif 912 #ifdef INET6 913 case AF_INET6: 914 if (ipv6_addr_legal) { 915 struct sockaddr_in6 *sin6, 916 *rsin6; 917 918 sin6 = &sctp_ifa->address.sin6; 919 rsin6 = (struct sockaddr_in6 *)to; 920 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 921 &sin6->sin6_addr) != 0) { 922 continue; 923 } 924 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 925 if (local_scope == 0) 926 continue; 927 if (sin6->sin6_scope_id == 0) { 928 if (sa6_recoverscope(sin6) != 0) 929 continue; 930 } 931 } 932 if ((site_scope == 0) && 933 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 934 continue; 935 } 936 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 937 SCTP_IPI_ADDR_RUNLOCK(); 938 return (1); 939 } 940 } 941 break; 942 #endif 943 default: 944 /* TSNH */ 945 break; 946 } 947 } 948 } 949 } else { 950 struct sctp_laddr *laddr; 951 952 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 953 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 954 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 955 continue; 956 } 957 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 958 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 959 /* 960 * We allow pending addresses, where we have 961 * sent an asconf-add to be considered 962 * valid. 963 */ 964 continue; 965 } 966 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 967 continue; 968 } 969 switch (to->sa_family) { 970 #ifdef INET 971 case AF_INET: 972 { 973 struct sockaddr_in *sin, *rsin; 974 975 sin = &laddr->ifa->address.sin; 976 rsin = (struct sockaddr_in *)to; 977 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 978 SCTP_IPI_ADDR_RUNLOCK(); 979 return (1); 980 } 981 break; 982 } 983 #endif 984 #ifdef INET6 985 case AF_INET6: 986 { 987 struct sockaddr_in6 *sin6, *rsin6; 988 989 sin6 = &laddr->ifa->address.sin6; 990 rsin6 = (struct sockaddr_in6 *)to; 991 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 992 SCTP_IPI_ADDR_RUNLOCK(); 993 return (1); 994 } 995 break; 996 } 997 998 #endif 999 default: 1000 /* TSNH */ 1001 break; 1002 } 1003 1004 } 1005 } 1006 SCTP_IPI_ADDR_RUNLOCK(); 1007 return (0); 1008 } 1009 1010 1011 static struct sctp_tcb * 1012 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1013 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1014 { 1015 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1016 /* 1017 * If we support the TCP model, then we must now dig through to see 1018 * if we can find our endpoint in the list of tcp ep's. 1019 */ 1020 uint16_t lport, rport; 1021 struct sctppcbhead *ephead; 1022 struct sctp_inpcb *inp; 1023 struct sctp_laddr *laddr; 1024 struct sctp_tcb *stcb; 1025 struct sctp_nets *net; 1026 1027 if ((to == NULL) || (from == NULL)) { 1028 return (NULL); 1029 } 1030 1031 switch (to->sa_family) { 1032 #ifdef INET 1033 case AF_INET: 1034 if (from->sa_family == AF_INET) { 1035 lport = ((struct sockaddr_in *)to)->sin_port; 1036 rport = ((struct sockaddr_in *)from)->sin_port; 1037 } else { 1038 return (NULL); 1039 } 1040 break; 1041 #endif 1042 #ifdef INET6 1043 case AF_INET6: 1044 if (from->sa_family == AF_INET6) { 1045 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1046 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1047 } else { 1048 return (NULL); 1049 } 1050 break; 1051 #endif 1052 default: 1053 return (NULL); 1054 } 1055 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1056 /* 1057 * Ok now for each of the guys in this bucket we must look and see: 1058 * - Does the remote port match. - Does there single association's 1059 * addresses match this address (to). If so we update p_ep to point 1060 * to this ep and return the tcb from it. 1061 */ 1062 LIST_FOREACH(inp, ephead, sctp_hash) { 1063 SCTP_INP_RLOCK(inp); 1064 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1065 SCTP_INP_RUNLOCK(inp); 1066 continue; 1067 } 1068 if (lport != inp->sctp_lport) { 1069 SCTP_INP_RUNLOCK(inp); 1070 continue; 1071 } 1072 switch (to->sa_family) { 1073 #ifdef INET 1074 case AF_INET: 1075 { 1076 struct sockaddr_in *sin; 1077 1078 sin = (struct sockaddr_in *)to; 1079 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1080 &sin->sin_addr) != 0) { 1081 SCTP_INP_RUNLOCK(inp); 1082 continue; 1083 } 1084 break; 1085 } 1086 #endif 1087 #ifdef INET6 1088 case AF_INET6: 1089 { 1090 struct sockaddr_in6 *sin6; 1091 1092 sin6 = (struct sockaddr_in6 *)to; 1093 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1094 &sin6->sin6_addr) != 0) { 1095 SCTP_INP_RUNLOCK(inp); 1096 continue; 1097 } 1098 break; 1099 } 1100 #endif 1101 default: 1102 SCTP_INP_RUNLOCK(inp); 1103 continue; 1104 } 1105 if (inp->def_vrf_id != vrf_id) { 1106 SCTP_INP_RUNLOCK(inp); 1107 continue; 1108 } 1109 /* check to see if the ep has one of the addresses */ 1110 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1111 /* We are NOT bound all, so look further */ 1112 int match = 0; 1113 1114 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1115 1116 if (laddr->ifa == NULL) { 1117 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1118 continue; 1119 } 1120 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1121 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1122 continue; 1123 } 1124 if (laddr->ifa->address.sa.sa_family == 1125 to->sa_family) { 1126 /* see if it matches */ 1127 #ifdef INET 1128 if (from->sa_family == AF_INET) { 1129 struct sockaddr_in *intf_addr, 1130 *sin; 1131 1132 intf_addr = &laddr->ifa->address.sin; 1133 sin = (struct sockaddr_in *)to; 1134 if (sin->sin_addr.s_addr == 1135 intf_addr->sin_addr.s_addr) { 1136 match = 1; 1137 break; 1138 } 1139 } 1140 #endif 1141 #ifdef INET6 1142 if (from->sa_family == AF_INET6) { 1143 struct sockaddr_in6 *intf_addr6; 1144 struct sockaddr_in6 *sin6; 1145 1146 sin6 = (struct sockaddr_in6 *) 1147 to; 1148 intf_addr6 = &laddr->ifa->address.sin6; 1149 1150 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1151 intf_addr6)) { 1152 match = 1; 1153 break; 1154 } 1155 } 1156 #endif 1157 } 1158 } 1159 if (match == 0) { 1160 /* This endpoint does not have this address */ 1161 SCTP_INP_RUNLOCK(inp); 1162 continue; 1163 } 1164 } 1165 /* 1166 * Ok if we hit here the ep has the address, does it hold 1167 * the tcb? 1168 */ 1169 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1170 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1171 if (stcb == NULL) { 1172 SCTP_INP_RUNLOCK(inp); 1173 continue; 1174 } 1175 SCTP_TCB_LOCK(stcb); 1176 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1177 SCTP_TCB_UNLOCK(stcb); 1178 SCTP_INP_RUNLOCK(inp); 1179 continue; 1180 } 1181 if (stcb->rport != rport) { 1182 /* remote port does not match. */ 1183 SCTP_TCB_UNLOCK(stcb); 1184 SCTP_INP_RUNLOCK(inp); 1185 continue; 1186 } 1187 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1188 SCTP_TCB_UNLOCK(stcb); 1189 SCTP_INP_RUNLOCK(inp); 1190 continue; 1191 } 1192 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1193 SCTP_TCB_UNLOCK(stcb); 1194 SCTP_INP_RUNLOCK(inp); 1195 continue; 1196 } 1197 /* Does this TCB have a matching address? */ 1198 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1199 1200 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1201 /* not the same family, can't be a match */ 1202 continue; 1203 } 1204 switch (from->sa_family) { 1205 #ifdef INET 1206 case AF_INET: 1207 { 1208 struct sockaddr_in *sin, *rsin; 1209 1210 sin = (struct sockaddr_in *)&net->ro._l_addr; 1211 rsin = (struct sockaddr_in *)from; 1212 if (sin->sin_addr.s_addr == 1213 rsin->sin_addr.s_addr) { 1214 /* found it */ 1215 if (netp != NULL) { 1216 *netp = net; 1217 } 1218 /* 1219 * Update the endpoint 1220 * pointer 1221 */ 1222 *inp_p = inp; 1223 SCTP_INP_RUNLOCK(inp); 1224 return (stcb); 1225 } 1226 break; 1227 } 1228 #endif 1229 #ifdef INET6 1230 case AF_INET6: 1231 { 1232 struct sockaddr_in6 *sin6, *rsin6; 1233 1234 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1235 rsin6 = (struct sockaddr_in6 *)from; 1236 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1237 rsin6)) { 1238 /* found it */ 1239 if (netp != NULL) { 1240 *netp = net; 1241 } 1242 /* 1243 * Update the endpoint 1244 * pointer 1245 */ 1246 *inp_p = inp; 1247 SCTP_INP_RUNLOCK(inp); 1248 return (stcb); 1249 } 1250 break; 1251 } 1252 #endif 1253 default: 1254 /* TSNH */ 1255 break; 1256 } 1257 } 1258 SCTP_TCB_UNLOCK(stcb); 1259 SCTP_INP_RUNLOCK(inp); 1260 } 1261 return (NULL); 1262 } 1263 1264 1265 /* 1266 * rules for use 1267 * 1268 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1269 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1270 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1271 * NULL. 1272 */ 1273 1274 struct sctp_tcb * 1275 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1276 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1277 { 1278 struct sctpasochead *head; 1279 struct sctp_inpcb *inp; 1280 struct sctp_tcb *stcb = NULL; 1281 struct sctp_nets *net; 1282 uint16_t rport; 1283 1284 inp = *inp_p; 1285 switch (remote->sa_family) { 1286 #ifdef INET 1287 case AF_INET: 1288 rport = (((struct sockaddr_in *)remote)->sin_port); 1289 break; 1290 #endif 1291 #ifdef INET6 1292 case AF_INET6: 1293 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1294 break; 1295 #endif 1296 default: 1297 return (NULL); 1298 } 1299 if (locked_tcb) { 1300 /* 1301 * UN-lock so we can do proper locking here this occurs when 1302 * called from load_addresses_from_init. 1303 */ 1304 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1305 SCTP_TCB_UNLOCK(locked_tcb); 1306 } 1307 SCTP_INP_INFO_RLOCK(); 1308 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1309 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1310 /*- 1311 * Now either this guy is our listener or it's the 1312 * connector. If it is the one that issued the connect, then 1313 * it's only chance is to be the first TCB in the list. If 1314 * it is the acceptor, then do the special_lookup to hash 1315 * and find the real inp. 1316 */ 1317 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1318 /* to is peer addr, from is my addr */ 1319 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1320 netp, inp->def_vrf_id); 1321 if ((stcb != NULL) && (locked_tcb == NULL)) { 1322 /* we have a locked tcb, lower refcount */ 1323 SCTP_INP_DECR_REF(inp); 1324 } 1325 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1326 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1327 SCTP_TCB_LOCK(locked_tcb); 1328 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1329 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1330 } 1331 SCTP_INP_INFO_RUNLOCK(); 1332 return (stcb); 1333 } else { 1334 SCTP_INP_WLOCK(inp); 1335 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1336 goto null_return; 1337 } 1338 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1339 if (stcb == NULL) { 1340 goto null_return; 1341 } 1342 SCTP_TCB_LOCK(stcb); 1343 1344 if (stcb->rport != rport) { 1345 /* remote port does not match. */ 1346 SCTP_TCB_UNLOCK(stcb); 1347 goto null_return; 1348 } 1349 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1350 SCTP_TCB_UNLOCK(stcb); 1351 goto null_return; 1352 } 1353 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1354 SCTP_TCB_UNLOCK(stcb); 1355 goto null_return; 1356 } 1357 /* now look at the list of remote addresses */ 1358 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1359 #ifdef INVARIANTS 1360 if (net == (TAILQ_NEXT(net, sctp_next))) { 1361 panic("Corrupt net list"); 1362 } 1363 #endif 1364 if (net->ro._l_addr.sa.sa_family != 1365 remote->sa_family) { 1366 /* not the same family */ 1367 continue; 1368 } 1369 switch (remote->sa_family) { 1370 #ifdef INET 1371 case AF_INET: 1372 { 1373 struct sockaddr_in *sin, 1374 *rsin; 1375 1376 sin = (struct sockaddr_in *) 1377 &net->ro._l_addr; 1378 rsin = (struct sockaddr_in *)remote; 1379 if (sin->sin_addr.s_addr == 1380 rsin->sin_addr.s_addr) { 1381 /* found it */ 1382 if (netp != NULL) { 1383 *netp = net; 1384 } 1385 if (locked_tcb == NULL) { 1386 SCTP_INP_DECR_REF(inp); 1387 } else if (locked_tcb != stcb) { 1388 SCTP_TCB_LOCK(locked_tcb); 1389 } 1390 if (locked_tcb) { 1391 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1392 } 1393 1394 SCTP_INP_WUNLOCK(inp); 1395 SCTP_INP_INFO_RUNLOCK(); 1396 return (stcb); 1397 } 1398 break; 1399 } 1400 #endif 1401 #ifdef INET6 1402 case AF_INET6: 1403 { 1404 struct sockaddr_in6 *sin6, 1405 *rsin6; 1406 1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1408 rsin6 = (struct sockaddr_in6 *)remote; 1409 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1410 rsin6)) { 1411 /* found it */ 1412 if (netp != NULL) { 1413 *netp = net; 1414 } 1415 if (locked_tcb == NULL) { 1416 SCTP_INP_DECR_REF(inp); 1417 } else if (locked_tcb != stcb) { 1418 SCTP_TCB_LOCK(locked_tcb); 1419 } 1420 if (locked_tcb) { 1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1422 } 1423 SCTP_INP_WUNLOCK(inp); 1424 SCTP_INP_INFO_RUNLOCK(); 1425 return (stcb); 1426 } 1427 break; 1428 } 1429 #endif 1430 default: 1431 /* TSNH */ 1432 break; 1433 } 1434 } 1435 SCTP_TCB_UNLOCK(stcb); 1436 } 1437 } else { 1438 SCTP_INP_WLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 goto null_return; 1441 } 1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1443 inp->sctp_hashmark)]; 1444 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1445 if (stcb->rport != rport) { 1446 /* remote port does not match */ 1447 continue; 1448 } 1449 SCTP_TCB_LOCK(stcb); 1450 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1455 SCTP_TCB_UNLOCK(stcb); 1456 continue; 1457 } 1458 /* now look at the list of remote addresses */ 1459 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1460 #ifdef INVARIANTS 1461 if (net == (TAILQ_NEXT(net, sctp_next))) { 1462 panic("Corrupt net list"); 1463 } 1464 #endif 1465 if (net->ro._l_addr.sa.sa_family != 1466 remote->sa_family) { 1467 /* not the same family */ 1468 continue; 1469 } 1470 switch (remote->sa_family) { 1471 #ifdef INET 1472 case AF_INET: 1473 { 1474 struct sockaddr_in *sin, 1475 *rsin; 1476 1477 sin = (struct sockaddr_in *) 1478 &net->ro._l_addr; 1479 rsin = (struct sockaddr_in *)remote; 1480 if (sin->sin_addr.s_addr == 1481 rsin->sin_addr.s_addr) { 1482 /* found it */ 1483 if (netp != NULL) { 1484 *netp = net; 1485 } 1486 if (locked_tcb == NULL) { 1487 SCTP_INP_DECR_REF(inp); 1488 } else if (locked_tcb != stcb) { 1489 SCTP_TCB_LOCK(locked_tcb); 1490 } 1491 if (locked_tcb) { 1492 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1493 } 1494 SCTP_INP_WUNLOCK(inp); 1495 SCTP_INP_INFO_RUNLOCK(); 1496 return (stcb); 1497 } 1498 break; 1499 } 1500 #endif 1501 #ifdef INET6 1502 case AF_INET6: 1503 { 1504 struct sockaddr_in6 *sin6, 1505 *rsin6; 1506 1507 sin6 = (struct sockaddr_in6 *) 1508 &net->ro._l_addr; 1509 rsin6 = (struct sockaddr_in6 *)remote; 1510 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1511 rsin6)) { 1512 /* found it */ 1513 if (netp != NULL) { 1514 *netp = net; 1515 } 1516 if (locked_tcb == NULL) { 1517 SCTP_INP_DECR_REF(inp); 1518 } else if (locked_tcb != stcb) { 1519 SCTP_TCB_LOCK(locked_tcb); 1520 } 1521 if (locked_tcb) { 1522 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1523 } 1524 SCTP_INP_WUNLOCK(inp); 1525 SCTP_INP_INFO_RUNLOCK(); 1526 return (stcb); 1527 } 1528 break; 1529 } 1530 #endif 1531 default: 1532 /* TSNH */ 1533 break; 1534 } 1535 } 1536 SCTP_TCB_UNLOCK(stcb); 1537 } 1538 } 1539 null_return: 1540 /* clean up for returning null */ 1541 if (locked_tcb) { 1542 SCTP_TCB_LOCK(locked_tcb); 1543 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1544 } 1545 SCTP_INP_WUNLOCK(inp); 1546 SCTP_INP_INFO_RUNLOCK(); 1547 /* not found */ 1548 return (NULL); 1549 } 1550 1551 1552 /* 1553 * Find an association for a specific endpoint using the association id given 1554 * out in the COMM_UP notification 1555 */ 1556 struct sctp_tcb * 1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1558 { 1559 /* 1560 * Use my the assoc_id to find a endpoint 1561 */ 1562 struct sctpasochead *head; 1563 struct sctp_tcb *stcb; 1564 uint32_t id; 1565 1566 if (inp == NULL) { 1567 SCTP_PRINTF("TSNH ep_associd\n"); 1568 return (NULL); 1569 } 1570 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1571 SCTP_PRINTF("TSNH ep_associd0\n"); 1572 return (NULL); 1573 } 1574 id = (uint32_t)asoc_id; 1575 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1576 if (head == NULL) { 1577 /* invalid id TSNH */ 1578 SCTP_PRINTF("TSNH ep_associd1\n"); 1579 return (NULL); 1580 } 1581 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1582 if (stcb->asoc.assoc_id == id) { 1583 if (inp != stcb->sctp_ep) { 1584 /* 1585 * some other guy has the same id active (id 1586 * collision ??). 1587 */ 1588 SCTP_PRINTF("TSNH ep_associd2\n"); 1589 continue; 1590 } 1591 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1592 continue; 1593 } 1594 if (want_lock) { 1595 SCTP_TCB_LOCK(stcb); 1596 } 1597 return (stcb); 1598 } 1599 } 1600 return (NULL); 1601 } 1602 1603 1604 struct sctp_tcb * 1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1606 { 1607 struct sctp_tcb *stcb; 1608 1609 SCTP_INP_RLOCK(inp); 1610 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1611 SCTP_INP_RUNLOCK(inp); 1612 return (stcb); 1613 } 1614 1615 1616 /* 1617 * Endpoint probe expects that the INP_INFO is locked. 1618 */ 1619 static struct sctp_inpcb * 1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1621 uint16_t lport, uint32_t vrf_id) 1622 { 1623 struct sctp_inpcb *inp; 1624 struct sctp_laddr *laddr; 1625 #ifdef INET 1626 struct sockaddr_in *sin; 1627 #endif 1628 #ifdef INET6 1629 struct sockaddr_in6 *sin6; 1630 struct sockaddr_in6 *intf_addr6; 1631 #endif 1632 int fnd; 1633 1634 #ifdef INET 1635 sin = NULL; 1636 #endif 1637 #ifdef INET6 1638 sin6 = NULL; 1639 #endif 1640 switch (nam->sa_family) { 1641 #ifdef INET 1642 case AF_INET: 1643 sin = (struct sockaddr_in *)nam; 1644 break; 1645 #endif 1646 #ifdef INET6 1647 case AF_INET6: 1648 sin6 = (struct sockaddr_in6 *)nam; 1649 break; 1650 #endif 1651 default: 1652 /* unsupported family */ 1653 return (NULL); 1654 } 1655 1656 if (head == NULL) 1657 return (NULL); 1658 1659 LIST_FOREACH(inp, head, sctp_hash) { 1660 SCTP_INP_RLOCK(inp); 1661 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1662 SCTP_INP_RUNLOCK(inp); 1663 continue; 1664 } 1665 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1666 (inp->sctp_lport == lport)) { 1667 /* got it */ 1668 switch (nam->sa_family) { 1669 #ifdef INET 1670 case AF_INET: 1671 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1672 SCTP_IPV6_V6ONLY(inp)) { 1673 /* 1674 * IPv4 on a IPv6 socket with ONLY 1675 * IPv6 set 1676 */ 1677 SCTP_INP_RUNLOCK(inp); 1678 continue; 1679 } 1680 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1681 &sin->sin_addr) != 0) { 1682 SCTP_INP_RUNLOCK(inp); 1683 continue; 1684 } 1685 break; 1686 #endif 1687 #ifdef INET6 1688 case AF_INET6: 1689 /* 1690 * A V6 address and the endpoint is NOT 1691 * bound V6 1692 */ 1693 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1694 SCTP_INP_RUNLOCK(inp); 1695 continue; 1696 } 1697 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1698 &sin6->sin6_addr) != 0) { 1699 SCTP_INP_RUNLOCK(inp); 1700 continue; 1701 } 1702 break; 1703 #endif 1704 default: 1705 break; 1706 } 1707 /* does a VRF id match? */ 1708 fnd = 0; 1709 if (inp->def_vrf_id == vrf_id) 1710 fnd = 1; 1711 1712 SCTP_INP_RUNLOCK(inp); 1713 if (!fnd) 1714 continue; 1715 return (inp); 1716 } 1717 SCTP_INP_RUNLOCK(inp); 1718 } 1719 switch (nam->sa_family) { 1720 #ifdef INET 1721 case AF_INET: 1722 if (sin->sin_addr.s_addr == INADDR_ANY) { 1723 /* Can't hunt for one that has no address specified */ 1724 return (NULL); 1725 } 1726 break; 1727 #endif 1728 #ifdef INET6 1729 case AF_INET6: 1730 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1731 /* Can't hunt for one that has no address specified */ 1732 return (NULL); 1733 } 1734 break; 1735 #endif 1736 default: 1737 break; 1738 } 1739 /* 1740 * ok, not bound to all so see if we can find a EP bound to this 1741 * address. 1742 */ 1743 LIST_FOREACH(inp, head, sctp_hash) { 1744 SCTP_INP_RLOCK(inp); 1745 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1746 SCTP_INP_RUNLOCK(inp); 1747 continue; 1748 } 1749 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1750 SCTP_INP_RUNLOCK(inp); 1751 continue; 1752 } 1753 /* 1754 * Ok this could be a likely candidate, look at all of its 1755 * addresses 1756 */ 1757 if (inp->sctp_lport != lport) { 1758 SCTP_INP_RUNLOCK(inp); 1759 continue; 1760 } 1761 /* does a VRF id match? */ 1762 fnd = 0; 1763 if (inp->def_vrf_id == vrf_id) 1764 fnd = 1; 1765 1766 if (!fnd) { 1767 SCTP_INP_RUNLOCK(inp); 1768 continue; 1769 } 1770 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1771 if (laddr->ifa == NULL) { 1772 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1773 __func__); 1774 continue; 1775 } 1776 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1777 (void *)laddr->ifa); 1778 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1779 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1780 continue; 1781 } 1782 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1783 /* possible, see if it matches */ 1784 switch (nam->sa_family) { 1785 #ifdef INET 1786 case AF_INET: 1787 if (sin->sin_addr.s_addr == 1788 laddr->ifa->address.sin.sin_addr.s_addr) { 1789 SCTP_INP_RUNLOCK(inp); 1790 return (inp); 1791 } 1792 break; 1793 #endif 1794 #ifdef INET6 1795 case AF_INET6: 1796 intf_addr6 = &laddr->ifa->address.sin6; 1797 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1798 intf_addr6)) { 1799 SCTP_INP_RUNLOCK(inp); 1800 return (inp); 1801 } 1802 break; 1803 #endif 1804 } 1805 } 1806 } 1807 SCTP_INP_RUNLOCK(inp); 1808 } 1809 return (NULL); 1810 } 1811 1812 1813 static struct sctp_inpcb * 1814 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1815 { 1816 struct sctppcbhead *head; 1817 struct sctp_inpcb *t_inp; 1818 int fnd; 1819 1820 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1821 SCTP_BASE_INFO(hashmark))]; 1822 LIST_FOREACH(t_inp, head, sctp_hash) { 1823 if (t_inp->sctp_lport != lport) { 1824 continue; 1825 } 1826 /* is it in the VRF in question */ 1827 fnd = 0; 1828 if (t_inp->def_vrf_id == vrf_id) 1829 fnd = 1; 1830 if (!fnd) 1831 continue; 1832 1833 /* This one is in use. */ 1834 /* check the v6/v4 binding issue */ 1835 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1836 SCTP_IPV6_V6ONLY(t_inp)) { 1837 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1838 /* collision in V6 space */ 1839 return (t_inp); 1840 } else { 1841 /* inp is BOUND_V4 no conflict */ 1842 continue; 1843 } 1844 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1845 /* t_inp is bound v4 and v6, conflict always */ 1846 return (t_inp); 1847 } else { 1848 /* t_inp is bound only V4 */ 1849 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1850 SCTP_IPV6_V6ONLY(inp)) { 1851 /* no conflict */ 1852 continue; 1853 } 1854 /* else fall through to conflict */ 1855 } 1856 return (t_inp); 1857 } 1858 return (NULL); 1859 } 1860 1861 1862 int 1863 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1864 { 1865 /* For 1-2-1 with port reuse */ 1866 struct sctppcbhead *head; 1867 struct sctp_inpcb *tinp, *ninp; 1868 1869 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1870 /* only works with port reuse on */ 1871 return (-1); 1872 } 1873 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1874 return (0); 1875 } 1876 SCTP_INP_RUNLOCK(inp); 1877 SCTP_INP_INFO_WLOCK(); 1878 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1879 SCTP_BASE_INFO(hashmark))]; 1880 /* Kick out all non-listeners to the TCP hash */ 1881 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1882 if (tinp->sctp_lport != inp->sctp_lport) { 1883 continue; 1884 } 1885 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1886 continue; 1887 } 1888 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1889 continue; 1890 } 1891 if (SCTP_IS_LISTENING(tinp)) { 1892 continue; 1893 } 1894 SCTP_INP_WLOCK(tinp); 1895 LIST_REMOVE(tinp, sctp_hash); 1896 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1897 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1898 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1899 SCTP_INP_WUNLOCK(tinp); 1900 } 1901 SCTP_INP_WLOCK(inp); 1902 /* Pull from where he was */ 1903 LIST_REMOVE(inp, sctp_hash); 1904 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1905 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1906 LIST_INSERT_HEAD(head, inp, sctp_hash); 1907 SCTP_INP_WUNLOCK(inp); 1908 SCTP_INP_RLOCK(inp); 1909 SCTP_INP_INFO_WUNLOCK(); 1910 return (0); 1911 } 1912 1913 1914 struct sctp_inpcb * 1915 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1916 uint32_t vrf_id) 1917 { 1918 /* 1919 * First we check the hash table to see if someone has this port 1920 * bound with just the port. 1921 */ 1922 struct sctp_inpcb *inp; 1923 struct sctppcbhead *head; 1924 int lport; 1925 unsigned int i; 1926 #ifdef INET 1927 struct sockaddr_in *sin; 1928 #endif 1929 #ifdef INET6 1930 struct sockaddr_in6 *sin6; 1931 #endif 1932 1933 switch (nam->sa_family) { 1934 #ifdef INET 1935 case AF_INET: 1936 sin = (struct sockaddr_in *)nam; 1937 lport = sin->sin_port; 1938 break; 1939 #endif 1940 #ifdef INET6 1941 case AF_INET6: 1942 sin6 = (struct sockaddr_in6 *)nam; 1943 lport = sin6->sin6_port; 1944 break; 1945 #endif 1946 default: 1947 return (NULL); 1948 } 1949 /* 1950 * I could cheat here and just cast to one of the types but we will 1951 * do it right. It also provides the check against an Unsupported 1952 * type too. 1953 */ 1954 /* Find the head of the ALLADDR chain */ 1955 if (have_lock == 0) { 1956 SCTP_INP_INFO_RLOCK(); 1957 } 1958 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1959 SCTP_BASE_INFO(hashmark))]; 1960 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1961 1962 /* 1963 * If the TCP model exists it could be that the main listening 1964 * endpoint is gone but there still exists a connected socket for 1965 * this guy. If so we can return the first one that we find. This 1966 * may NOT be the correct one so the caller should be wary on the 1967 * returned INP. Currently the only caller that sets find_tcp_pool 1968 * is in bindx where we are verifying that a user CAN bind the 1969 * address. He either has bound it already, or someone else has, or 1970 * its open to bind, so this is good enough. 1971 */ 1972 if (inp == NULL && find_tcp_pool) { 1973 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1974 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1975 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1976 if (inp) { 1977 break; 1978 } 1979 } 1980 } 1981 if (inp) { 1982 SCTP_INP_INCR_REF(inp); 1983 } 1984 if (have_lock == 0) { 1985 SCTP_INP_INFO_RUNLOCK(); 1986 } 1987 return (inp); 1988 } 1989 1990 1991 /* 1992 * Find an association for an endpoint with the pointer to whom you want to 1993 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1994 * need to change the *to to some other struct like a mbuf... 1995 */ 1996 struct sctp_tcb * 1997 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1998 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1999 uint32_t vrf_id) 2000 { 2001 struct sctp_inpcb *inp = NULL; 2002 struct sctp_tcb *stcb; 2003 2004 SCTP_INP_INFO_RLOCK(); 2005 if (find_tcp_pool) { 2006 if (inp_p != NULL) { 2007 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2008 vrf_id); 2009 } else { 2010 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2011 vrf_id); 2012 } 2013 if (stcb != NULL) { 2014 SCTP_INP_INFO_RUNLOCK(); 2015 return (stcb); 2016 } 2017 } 2018 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2019 if (inp_p != NULL) { 2020 *inp_p = inp; 2021 } 2022 SCTP_INP_INFO_RUNLOCK(); 2023 if (inp == NULL) { 2024 return (NULL); 2025 } 2026 /* 2027 * ok, we have an endpoint, now lets find the assoc for it (if any) 2028 * we now place the source address or from in the to of the find 2029 * endpoint call. Since in reality this chain is used from the 2030 * inbound packet side. 2031 */ 2032 if (inp_p != NULL) { 2033 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2034 NULL); 2035 } else { 2036 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2037 NULL); 2038 } 2039 return (stcb); 2040 } 2041 2042 2043 /* 2044 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2045 * find all addresses that the sender has specified in any address list. Each 2046 * address will be used to lookup the TCB and see if one exits. 2047 */ 2048 static struct sctp_tcb * 2049 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2050 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2051 struct sockaddr *dst) 2052 { 2053 struct sctp_paramhdr *phdr, param_buf; 2054 #if defined(INET) || defined(INET6) 2055 struct sctp_tcb *stcb; 2056 uint16_t ptype; 2057 #endif 2058 uint16_t plen; 2059 #ifdef INET 2060 struct sockaddr_in sin4; 2061 #endif 2062 #ifdef INET6 2063 struct sockaddr_in6 sin6; 2064 #endif 2065 2066 #ifdef INET 2067 memset(&sin4, 0, sizeof(sin4)); 2068 sin4.sin_len = sizeof(sin4); 2069 sin4.sin_family = AF_INET; 2070 sin4.sin_port = sh->src_port; 2071 #endif 2072 #ifdef INET6 2073 memset(&sin6, 0, sizeof(sin6)); 2074 sin6.sin6_len = sizeof(sin6); 2075 sin6.sin6_family = AF_INET6; 2076 sin6.sin6_port = sh->src_port; 2077 #endif 2078 2079 offset += sizeof(struct sctp_init_chunk); 2080 2081 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2082 while (phdr != NULL) { 2083 /* now we must see if we want the parameter */ 2084 #if defined(INET) || defined(INET6) 2085 ptype = ntohs(phdr->param_type); 2086 #endif 2087 plen = ntohs(phdr->param_length); 2088 if (plen == 0) { 2089 break; 2090 } 2091 #ifdef INET 2092 if (ptype == SCTP_IPV4_ADDRESS && 2093 plen == sizeof(struct sctp_ipv4addr_param)) { 2094 /* Get the rest of the address */ 2095 struct sctp_ipv4addr_param ip4_param, *p4; 2096 2097 phdr = sctp_get_next_param(m, offset, 2098 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2099 if (phdr == NULL) { 2100 return (NULL); 2101 } 2102 p4 = (struct sctp_ipv4addr_param *)phdr; 2103 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2104 /* look it up */ 2105 stcb = sctp_findassociation_ep_addr(inp_p, 2106 (struct sockaddr *)&sin4, netp, dst, NULL); 2107 if (stcb != NULL) { 2108 return (stcb); 2109 } 2110 } 2111 #endif 2112 #ifdef INET6 2113 if (ptype == SCTP_IPV6_ADDRESS && 2114 plen == sizeof(struct sctp_ipv6addr_param)) { 2115 /* Get the rest of the address */ 2116 struct sctp_ipv6addr_param ip6_param, *p6; 2117 2118 phdr = sctp_get_next_param(m, offset, 2119 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2120 if (phdr == NULL) { 2121 return (NULL); 2122 } 2123 p6 = (struct sctp_ipv6addr_param *)phdr; 2124 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2125 /* look it up */ 2126 stcb = sctp_findassociation_ep_addr(inp_p, 2127 (struct sockaddr *)&sin6, netp, dst, NULL); 2128 if (stcb != NULL) { 2129 return (stcb); 2130 } 2131 } 2132 #endif 2133 offset += SCTP_SIZE32(plen); 2134 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2135 sizeof(param_buf)); 2136 } 2137 return (NULL); 2138 } 2139 2140 static struct sctp_tcb * 2141 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2142 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2143 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2144 { 2145 /* 2146 * Use my vtag to hash. If we find it we then verify the source addr 2147 * is in the assoc. If all goes well we save a bit on rec of a 2148 * packet. 2149 */ 2150 struct sctpasochead *head; 2151 struct sctp_nets *net; 2152 struct sctp_tcb *stcb; 2153 2154 SCTP_INP_INFO_RLOCK(); 2155 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2156 SCTP_BASE_INFO(hashasocmark))]; 2157 LIST_FOREACH(stcb, head, sctp_asocs) { 2158 SCTP_INP_RLOCK(stcb->sctp_ep); 2159 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2160 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2161 continue; 2162 } 2163 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2164 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2165 continue; 2166 } 2167 SCTP_TCB_LOCK(stcb); 2168 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2169 if (stcb->asoc.my_vtag == vtag) { 2170 /* candidate */ 2171 if (stcb->rport != rport) { 2172 SCTP_TCB_UNLOCK(stcb); 2173 continue; 2174 } 2175 if (stcb->sctp_ep->sctp_lport != lport) { 2176 SCTP_TCB_UNLOCK(stcb); 2177 continue; 2178 } 2179 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2180 SCTP_TCB_UNLOCK(stcb); 2181 continue; 2182 } 2183 /* RRS:Need toaddr check here */ 2184 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2185 /* Endpoint does not own this address */ 2186 SCTP_TCB_UNLOCK(stcb); 2187 continue; 2188 } 2189 if (remote_tag) { 2190 /* 2191 * If we have both vtags that's all we match 2192 * on 2193 */ 2194 if (stcb->asoc.peer_vtag == remote_tag) { 2195 /* 2196 * If both tags match we consider it 2197 * conclusive and check NO 2198 * source/destination addresses 2199 */ 2200 goto conclusive; 2201 } 2202 } 2203 if (skip_src_check) { 2204 conclusive: 2205 if (from) { 2206 *netp = sctp_findnet(stcb, from); 2207 } else { 2208 *netp = NULL; /* unknown */ 2209 } 2210 if (inp_p) 2211 *inp_p = stcb->sctp_ep; 2212 SCTP_INP_INFO_RUNLOCK(); 2213 return (stcb); 2214 } 2215 net = sctp_findnet(stcb, from); 2216 if (net) { 2217 /* yep its him. */ 2218 *netp = net; 2219 SCTP_STAT_INCR(sctps_vtagexpress); 2220 *inp_p = stcb->sctp_ep; 2221 SCTP_INP_INFO_RUNLOCK(); 2222 return (stcb); 2223 } else { 2224 /* 2225 * not him, this should only happen in rare 2226 * cases so I peg it. 2227 */ 2228 SCTP_STAT_INCR(sctps_vtagbogus); 2229 } 2230 } 2231 SCTP_TCB_UNLOCK(stcb); 2232 } 2233 SCTP_INP_INFO_RUNLOCK(); 2234 return (NULL); 2235 } 2236 2237 2238 /* 2239 * Find an association with the pointer to the inbound IP packet. This can be 2240 * a IPv4 or IPv6 packet. 2241 */ 2242 struct sctp_tcb * 2243 sctp_findassociation_addr(struct mbuf *m, int offset, 2244 struct sockaddr *src, struct sockaddr *dst, 2245 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2246 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2247 { 2248 struct sctp_tcb *stcb; 2249 struct sctp_inpcb *inp; 2250 2251 if (sh->v_tag) { 2252 /* we only go down this path if vtag is non-zero */ 2253 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2254 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2255 if (stcb) { 2256 return (stcb); 2257 } 2258 } 2259 2260 if (inp_p) { 2261 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2262 1, vrf_id); 2263 inp = *inp_p; 2264 } else { 2265 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2266 1, vrf_id); 2267 } 2268 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2269 if (stcb == NULL && inp) { 2270 /* Found a EP but not this address */ 2271 if ((ch->chunk_type == SCTP_INITIATION) || 2272 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2273 /*- 2274 * special hook, we do NOT return linp or an 2275 * association that is linked to an existing 2276 * association that is under the TCP pool (i.e. no 2277 * listener exists). The endpoint finding routine 2278 * will always find a listener before examining the 2279 * TCP pool. 2280 */ 2281 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2282 if (inp_p) { 2283 *inp_p = NULL; 2284 } 2285 return (NULL); 2286 } 2287 stcb = sctp_findassociation_special_addr(m, 2288 offset, sh, &inp, netp, dst); 2289 if (inp_p != NULL) { 2290 *inp_p = inp; 2291 } 2292 } 2293 } 2294 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2295 return (stcb); 2296 } 2297 2298 /* 2299 * lookup an association by an ASCONF lookup address. 2300 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2301 */ 2302 struct sctp_tcb * 2303 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2304 struct sockaddr *dst, struct sctphdr *sh, 2305 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2306 { 2307 struct sctp_tcb *stcb; 2308 union sctp_sockstore remote_store; 2309 struct sctp_paramhdr param_buf, *phdr; 2310 int ptype; 2311 int zero_address = 0; 2312 #ifdef INET 2313 struct sockaddr_in *sin; 2314 #endif 2315 #ifdef INET6 2316 struct sockaddr_in6 *sin6; 2317 #endif 2318 2319 memset(&remote_store, 0, sizeof(remote_store)); 2320 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2321 ¶m_buf, sizeof(struct sctp_paramhdr)); 2322 if (phdr == NULL) { 2323 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2324 __func__); 2325 return NULL; 2326 } 2327 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2328 /* get the correlation address */ 2329 switch (ptype) { 2330 #ifdef INET6 2331 case SCTP_IPV6_ADDRESS: 2332 { 2333 /* ipv6 address param */ 2334 struct sctp_ipv6addr_param *p6, p6_buf; 2335 2336 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2337 return NULL; 2338 } 2339 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2340 offset + sizeof(struct sctp_asconf_chunk), 2341 &p6_buf.ph, sizeof(p6_buf)); 2342 if (p6 == NULL) { 2343 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2344 __func__); 2345 return (NULL); 2346 } 2347 sin6 = &remote_store.sin6; 2348 sin6->sin6_family = AF_INET6; 2349 sin6->sin6_len = sizeof(*sin6); 2350 sin6->sin6_port = sh->src_port; 2351 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2352 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2353 zero_address = 1; 2354 break; 2355 } 2356 #endif 2357 #ifdef INET 2358 case SCTP_IPV4_ADDRESS: 2359 { 2360 /* ipv4 address param */ 2361 struct sctp_ipv4addr_param *p4, p4_buf; 2362 2363 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2364 return NULL; 2365 } 2366 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2367 offset + sizeof(struct sctp_asconf_chunk), 2368 &p4_buf.ph, sizeof(p4_buf)); 2369 if (p4 == NULL) { 2370 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2371 __func__); 2372 return (NULL); 2373 } 2374 sin = &remote_store.sin; 2375 sin->sin_family = AF_INET; 2376 sin->sin_len = sizeof(*sin); 2377 sin->sin_port = sh->src_port; 2378 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2379 if (sin->sin_addr.s_addr == INADDR_ANY) 2380 zero_address = 1; 2381 break; 2382 } 2383 #endif 2384 default: 2385 /* invalid address param type */ 2386 return NULL; 2387 } 2388 2389 if (zero_address) { 2390 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2391 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2392 if (stcb != NULL) { 2393 SCTP_INP_DECR_REF(*inp_p); 2394 } 2395 } else { 2396 stcb = sctp_findassociation_ep_addr(inp_p, 2397 &remote_store.sa, netp, 2398 dst, NULL); 2399 } 2400 return (stcb); 2401 } 2402 2403 2404 /* 2405 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2406 * addresses. This way if we don't get a bind we by default pick a ephemeral 2407 * port with all addresses bound. 2408 */ 2409 int 2410 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2411 { 2412 /* 2413 * we get called when a new endpoint starts up. We need to allocate 2414 * the sctp_inpcb structure from the zone and init it. Mark it as 2415 * unbound and find a port that we can use as an ephemeral with 2416 * INADDR_ANY. If the user binds later no problem we can then add in 2417 * the specific addresses. And setup the default parameters for the 2418 * EP. 2419 */ 2420 int i, error; 2421 struct sctp_inpcb *inp; 2422 struct sctp_pcb *m; 2423 struct timeval time; 2424 sctp_sharedkey_t *null_key; 2425 2426 error = 0; 2427 2428 SCTP_INP_INFO_WLOCK(); 2429 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2430 if (inp == NULL) { 2431 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2432 SCTP_INP_INFO_WUNLOCK(); 2433 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2434 return (ENOBUFS); 2435 } 2436 /* zap it */ 2437 memset(inp, 0, sizeof(*inp)); 2438 2439 /* bump generations */ 2440 /* setup socket pointers */ 2441 inp->sctp_socket = so; 2442 inp->ip_inp.inp.inp_socket = so; 2443 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2444 #ifdef INET6 2445 if (INP_SOCKAF(so) == AF_INET6) { 2446 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2447 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2448 } 2449 if (MODULE_GLOBAL(ip6_v6only)) { 2450 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2451 } 2452 } 2453 #endif 2454 inp->sctp_associd_counter = 1; 2455 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2456 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2457 inp->max_cwnd = 0; 2458 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2459 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2460 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2461 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2462 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2463 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2464 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2465 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2466 inp->idata_supported = 0; 2467 2468 inp->fibnum = so->so_fibnum; 2469 /* init the small hash table we use to track asocid <-> tcb */ 2470 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2471 if (inp->sctp_asocidhash == NULL) { 2472 crfree(inp->ip_inp.inp.inp_cred); 2473 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2474 SCTP_INP_INFO_WUNLOCK(); 2475 return (ENOBUFS); 2476 } 2477 SCTP_INCR_EP_COUNT(); 2478 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2479 SCTP_INP_INFO_WUNLOCK(); 2480 2481 so->so_pcb = (caddr_t)inp; 2482 2483 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2484 /* UDP style socket */ 2485 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2486 SCTP_PCB_FLAGS_UNBOUND); 2487 /* Be sure it is NON-BLOCKING IO for UDP */ 2488 /* SCTP_SET_SO_NBIO(so); */ 2489 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2490 /* TCP style socket */ 2491 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2492 SCTP_PCB_FLAGS_UNBOUND); 2493 /* Be sure we have blocking IO by default */ 2494 SOCK_LOCK(so); 2495 SCTP_CLEAR_SO_NBIO(so); 2496 SOCK_UNLOCK(so); 2497 } else { 2498 /* 2499 * unsupported socket type (RAW, etc)- in case we missed it 2500 * in protosw 2501 */ 2502 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2503 so->so_pcb = NULL; 2504 crfree(inp->ip_inp.inp.inp_cred); 2505 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2506 return (EOPNOTSUPP); 2507 } 2508 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2509 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2510 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2511 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2512 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2513 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2514 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2515 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2516 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2517 } 2518 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2519 &inp->sctp_hashmark); 2520 if (inp->sctp_tcbhash == NULL) { 2521 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2522 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2523 so->so_pcb = NULL; 2524 crfree(inp->ip_inp.inp.inp_cred); 2525 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2526 return (ENOBUFS); 2527 } 2528 inp->def_vrf_id = vrf_id; 2529 2530 SCTP_INP_INFO_WLOCK(); 2531 SCTP_INP_LOCK_INIT(inp); 2532 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2533 SCTP_INP_READ_INIT(inp); 2534 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2535 /* lock the new ep */ 2536 SCTP_INP_WLOCK(inp); 2537 2538 /* add it to the info area */ 2539 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2540 SCTP_INP_INFO_WUNLOCK(); 2541 2542 TAILQ_INIT(&inp->read_queue); 2543 LIST_INIT(&inp->sctp_addr_list); 2544 2545 LIST_INIT(&inp->sctp_asoc_list); 2546 2547 #ifdef SCTP_TRACK_FREED_ASOCS 2548 /* TEMP CODE */ 2549 LIST_INIT(&inp->sctp_asoc_free_list); 2550 #endif 2551 /* Init the timer structure for signature change */ 2552 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2553 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2554 2555 /* now init the actual endpoint default data */ 2556 m = &inp->sctp_ep; 2557 2558 /* setup the base timeout information */ 2559 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2560 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2561 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2562 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2563 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2564 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2565 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2566 /* all max/min max are in ms */ 2567 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2568 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2569 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2570 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2571 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2572 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2573 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2574 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2575 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2576 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2577 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2578 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2579 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2580 2581 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2582 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2583 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2584 /* number of streams to pre-open on a association */ 2585 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2586 2587 m->default_mtu = 0; 2588 /* Add adaptation cookie */ 2589 m->adaptation_layer_indicator = 0; 2590 m->adaptation_layer_indicator_provided = 0; 2591 2592 /* seed random number generator */ 2593 m->random_counter = 1; 2594 m->store_at = SCTP_SIGNATURE_SIZE; 2595 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2596 sctp_fill_random_store(m); 2597 2598 /* Minimum cookie size */ 2599 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2600 sizeof(struct sctp_state_cookie); 2601 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2602 2603 /* Setup the initial secret */ 2604 (void)SCTP_GETTIME_TIMEVAL(&time); 2605 m->time_of_secret_change = time.tv_sec; 2606 2607 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2608 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2609 } 2610 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2611 2612 /* How long is a cookie good for ? */ 2613 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2614 /* 2615 * Initialize authentication parameters 2616 */ 2617 m->local_hmacs = sctp_default_supported_hmaclist(); 2618 m->local_auth_chunks = sctp_alloc_chunklist(); 2619 if (inp->asconf_supported) { 2620 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2621 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2622 } 2623 m->default_dscp = 0; 2624 #ifdef INET6 2625 m->default_flowlabel = 0; 2626 #endif 2627 m->port = 0; /* encapsulation disabled by default */ 2628 LIST_INIT(&m->shared_keys); 2629 /* add default NULL key as key id 0 */ 2630 null_key = sctp_alloc_sharedkey(); 2631 sctp_insert_sharedkey(&m->shared_keys, null_key); 2632 SCTP_INP_WUNLOCK(inp); 2633 #ifdef SCTP_LOG_CLOSING 2634 sctp_log_closing(inp, NULL, 12); 2635 #endif 2636 return (error); 2637 } 2638 2639 2640 void 2641 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2642 struct sctp_tcb *stcb) 2643 { 2644 struct sctp_nets *net; 2645 uint16_t lport, rport; 2646 struct sctppcbhead *head; 2647 struct sctp_laddr *laddr, *oladdr; 2648 2649 atomic_add_int(&stcb->asoc.refcnt, 1); 2650 SCTP_TCB_UNLOCK(stcb); 2651 SCTP_INP_INFO_WLOCK(); 2652 SCTP_INP_WLOCK(old_inp); 2653 SCTP_INP_WLOCK(new_inp); 2654 SCTP_TCB_LOCK(stcb); 2655 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2656 2657 new_inp->sctp_ep.time_of_secret_change = 2658 old_inp->sctp_ep.time_of_secret_change; 2659 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2660 sizeof(old_inp->sctp_ep.secret_key)); 2661 new_inp->sctp_ep.current_secret_number = 2662 old_inp->sctp_ep.current_secret_number; 2663 new_inp->sctp_ep.last_secret_number = 2664 old_inp->sctp_ep.last_secret_number; 2665 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2666 2667 /* make it so new data pours into the new socket */ 2668 stcb->sctp_socket = new_inp->sctp_socket; 2669 stcb->sctp_ep = new_inp; 2670 2671 /* Copy the port across */ 2672 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2673 rport = stcb->rport; 2674 /* Pull the tcb from the old association */ 2675 LIST_REMOVE(stcb, sctp_tcbhash); 2676 LIST_REMOVE(stcb, sctp_tcblist); 2677 if (stcb->asoc.in_asocid_hash) { 2678 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2679 } 2680 /* Now insert the new_inp into the TCP connected hash */ 2681 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2682 2683 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2684 /* Its safe to access */ 2685 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2686 2687 /* Now move the tcb into the endpoint list */ 2688 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2689 /* 2690 * Question, do we even need to worry about the ep-hash since we 2691 * only have one connection? Probably not :> so lets get rid of it 2692 * and not suck up any kernel memory in that. 2693 */ 2694 if (stcb->asoc.in_asocid_hash) { 2695 struct sctpasochead *lhd; 2696 2697 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2698 new_inp->hashasocidmark)]; 2699 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2700 } 2701 /* Ok. Let's restart timer. */ 2702 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2703 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2704 stcb, net); 2705 } 2706 2707 SCTP_INP_INFO_WUNLOCK(); 2708 if (new_inp->sctp_tcbhash != NULL) { 2709 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2710 new_inp->sctp_tcbhash = NULL; 2711 } 2712 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2713 /* Subset bound, so copy in the laddr list from the old_inp */ 2714 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2715 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2716 if (laddr == NULL) { 2717 /* 2718 * Gak, what can we do? This assoc is really 2719 * HOSED. We probably should send an abort 2720 * here. 2721 */ 2722 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2723 continue; 2724 } 2725 SCTP_INCR_LADDR_COUNT(); 2726 memset(laddr, 0, sizeof(*laddr)); 2727 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2728 laddr->ifa = oladdr->ifa; 2729 atomic_add_int(&laddr->ifa->refcount, 1); 2730 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2731 sctp_nxt_addr); 2732 new_inp->laddr_count++; 2733 if (oladdr == stcb->asoc.last_used_address) { 2734 stcb->asoc.last_used_address = laddr; 2735 } 2736 } 2737 } 2738 /* 2739 * Now any running timers need to be adjusted since we really don't 2740 * care if they are running or not just blast in the new_inp into 2741 * all of them. 2742 */ 2743 2744 stcb->asoc.dack_timer.ep = (void *)new_inp; 2745 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2746 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2747 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2748 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2749 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2750 /* now what about the nets? */ 2751 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2752 net->pmtu_timer.ep = (void *)new_inp; 2753 net->hb_timer.ep = (void *)new_inp; 2754 net->rxt_timer.ep = (void *)new_inp; 2755 } 2756 SCTP_INP_WUNLOCK(new_inp); 2757 SCTP_INP_WUNLOCK(old_inp); 2758 } 2759 2760 /* 2761 * insert an laddr entry with the given ifa for the desired list 2762 */ 2763 static int 2764 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2765 { 2766 struct sctp_laddr *laddr; 2767 2768 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2769 if (laddr == NULL) { 2770 /* out of memory? */ 2771 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2772 return (EINVAL); 2773 } 2774 SCTP_INCR_LADDR_COUNT(); 2775 memset(laddr, 0, sizeof(*laddr)); 2776 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2777 laddr->ifa = ifa; 2778 laddr->action = act; 2779 atomic_add_int(&ifa->refcount, 1); 2780 /* insert it */ 2781 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2782 2783 return (0); 2784 } 2785 2786 /* 2787 * Remove an laddr entry from the local address list (on an assoc) 2788 */ 2789 static void 2790 sctp_remove_laddr(struct sctp_laddr *laddr) 2791 { 2792 2793 /* remove from the list */ 2794 LIST_REMOVE(laddr, sctp_nxt_addr); 2795 sctp_free_ifa(laddr->ifa); 2796 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2797 SCTP_DECR_LADDR_COUNT(); 2798 } 2799 2800 2801 2802 /* sctp_ifap is used to bypass normal local address validation checks */ 2803 int 2804 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2805 struct sctp_ifa *sctp_ifap, struct thread *p) 2806 { 2807 /* bind a ep to a socket address */ 2808 struct sctppcbhead *head; 2809 struct sctp_inpcb *inp, *inp_tmp; 2810 struct inpcb *ip_inp; 2811 int port_reuse_active = 0; 2812 int bindall; 2813 uint16_t lport; 2814 int error; 2815 uint32_t vrf_id; 2816 2817 lport = 0; 2818 bindall = 1; 2819 inp = (struct sctp_inpcb *)so->so_pcb; 2820 ip_inp = (struct inpcb *)so->so_pcb; 2821 #ifdef SCTP_DEBUG 2822 if (addr) { 2823 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2824 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2825 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2826 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2827 } 2828 #endif 2829 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2830 /* already did a bind, subsequent binds NOT allowed ! */ 2831 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2832 return (EINVAL); 2833 } 2834 #ifdef INVARIANTS 2835 if (p == NULL) 2836 panic("null proc/thread"); 2837 #endif 2838 if (addr != NULL) { 2839 switch (addr->sa_family) { 2840 #ifdef INET 2841 case AF_INET: 2842 { 2843 struct sockaddr_in *sin; 2844 2845 /* IPV6_V6ONLY socket? */ 2846 if (SCTP_IPV6_V6ONLY(inp)) { 2847 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2848 return (EINVAL); 2849 } 2850 if (addr->sa_len != sizeof(*sin)) { 2851 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2852 return (EINVAL); 2853 } 2854 2855 sin = (struct sockaddr_in *)addr; 2856 lport = sin->sin_port; 2857 /* 2858 * For LOOPBACK the prison_local_ip4() call 2859 * will transmute the ip address to the 2860 * proper value. 2861 */ 2862 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2863 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2864 return (error); 2865 } 2866 if (sin->sin_addr.s_addr != INADDR_ANY) { 2867 bindall = 0; 2868 } 2869 break; 2870 } 2871 #endif 2872 #ifdef INET6 2873 case AF_INET6: 2874 { 2875 /* 2876 * Only for pure IPv6 Address. (No IPv4 2877 * Mapped!) 2878 */ 2879 struct sockaddr_in6 *sin6; 2880 2881 sin6 = (struct sockaddr_in6 *)addr; 2882 2883 if (addr->sa_len != sizeof(*sin6)) { 2884 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2885 return (EINVAL); 2886 } 2887 lport = sin6->sin6_port; 2888 /* 2889 * For LOOPBACK the prison_local_ip6() call 2890 * will transmute the ipv6 address to the 2891 * proper value. 2892 */ 2893 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2894 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2895 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2896 return (error); 2897 } 2898 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2899 bindall = 0; 2900 /* KAME hack: embed scopeid */ 2901 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2902 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2903 return (EINVAL); 2904 } 2905 } 2906 /* this must be cleared for ifa_ifwithaddr() */ 2907 sin6->sin6_scope_id = 0; 2908 break; 2909 } 2910 #endif 2911 default: 2912 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2913 return (EAFNOSUPPORT); 2914 } 2915 } 2916 SCTP_INP_INFO_WLOCK(); 2917 SCTP_INP_WLOCK(inp); 2918 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2919 vrf_id = inp->def_vrf_id; 2920 2921 /* increase our count due to the unlock we do */ 2922 SCTP_INP_INCR_REF(inp); 2923 if (lport) { 2924 /* 2925 * Did the caller specify a port? if so we must see if an ep 2926 * already has this one bound. 2927 */ 2928 /* got to be root to get at low ports */ 2929 if (ntohs(lport) < IPPORT_RESERVED) { 2930 if ((p != NULL) && ((error = 2931 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2932 ) != 0)) { 2933 SCTP_INP_DECR_REF(inp); 2934 SCTP_INP_WUNLOCK(inp); 2935 SCTP_INP_INFO_WUNLOCK(); 2936 return (error); 2937 } 2938 } 2939 SCTP_INP_WUNLOCK(inp); 2940 if (bindall) { 2941 vrf_id = inp->def_vrf_id; 2942 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2943 if (inp_tmp != NULL) { 2944 /* 2945 * lock guy returned and lower count note 2946 * that we are not bound so inp_tmp should 2947 * NEVER be inp. And it is this inp 2948 * (inp_tmp) that gets the reference bump, 2949 * so we must lower it. 2950 */ 2951 SCTP_INP_DECR_REF(inp_tmp); 2952 /* unlock info */ 2953 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2954 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2955 /* 2956 * Ok, must be one-2-one and 2957 * allowing port re-use 2958 */ 2959 port_reuse_active = 1; 2960 goto continue_anyway; 2961 } 2962 SCTP_INP_DECR_REF(inp); 2963 SCTP_INP_INFO_WUNLOCK(); 2964 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2965 return (EADDRINUSE); 2966 } 2967 } else { 2968 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2969 if (inp_tmp != NULL) { 2970 /* 2971 * lock guy returned and lower count note 2972 * that we are not bound so inp_tmp should 2973 * NEVER be inp. And it is this inp 2974 * (inp_tmp) that gets the reference bump, 2975 * so we must lower it. 2976 */ 2977 SCTP_INP_DECR_REF(inp_tmp); 2978 /* unlock info */ 2979 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2980 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2981 /* 2982 * Ok, must be one-2-one and 2983 * allowing port re-use 2984 */ 2985 port_reuse_active = 1; 2986 goto continue_anyway; 2987 } 2988 SCTP_INP_DECR_REF(inp); 2989 SCTP_INP_INFO_WUNLOCK(); 2990 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2991 return (EADDRINUSE); 2992 } 2993 } 2994 continue_anyway: 2995 SCTP_INP_WLOCK(inp); 2996 if (bindall) { 2997 /* verify that no lport is not used by a singleton */ 2998 if ((port_reuse_active == 0) && 2999 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3000 /* Sorry someone already has this one bound */ 3001 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3002 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3003 port_reuse_active = 1; 3004 } else { 3005 SCTP_INP_DECR_REF(inp); 3006 SCTP_INP_WUNLOCK(inp); 3007 SCTP_INP_INFO_WUNLOCK(); 3008 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3009 return (EADDRINUSE); 3010 } 3011 } 3012 } 3013 } else { 3014 uint16_t first, last, candidate; 3015 uint16_t count; 3016 int done; 3017 3018 if (ip_inp->inp_flags & INP_HIGHPORT) { 3019 first = MODULE_GLOBAL(ipport_hifirstauto); 3020 last = MODULE_GLOBAL(ipport_hilastauto); 3021 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3022 if (p && (error = 3023 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3024 )) { 3025 SCTP_INP_DECR_REF(inp); 3026 SCTP_INP_WUNLOCK(inp); 3027 SCTP_INP_INFO_WUNLOCK(); 3028 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3029 return (error); 3030 } 3031 first = MODULE_GLOBAL(ipport_lowfirstauto); 3032 last = MODULE_GLOBAL(ipport_lowlastauto); 3033 } else { 3034 first = MODULE_GLOBAL(ipport_firstauto); 3035 last = MODULE_GLOBAL(ipport_lastauto); 3036 } 3037 if (first > last) { 3038 uint16_t temp; 3039 3040 temp = first; 3041 first = last; 3042 last = temp; 3043 } 3044 count = last - first + 1; /* number of candidates */ 3045 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3046 3047 done = 0; 3048 while (!done) { 3049 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3050 done = 1; 3051 } 3052 if (!done) { 3053 if (--count == 0) { 3054 SCTP_INP_DECR_REF(inp); 3055 SCTP_INP_WUNLOCK(inp); 3056 SCTP_INP_INFO_WUNLOCK(); 3057 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3058 return (EADDRINUSE); 3059 } 3060 if (candidate == last) 3061 candidate = first; 3062 else 3063 candidate = candidate + 1; 3064 } 3065 } 3066 lport = htons(candidate); 3067 } 3068 SCTP_INP_DECR_REF(inp); 3069 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3070 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3071 /* 3072 * this really should not happen. The guy did a non-blocking 3073 * bind and then did a close at the same time. 3074 */ 3075 SCTP_INP_WUNLOCK(inp); 3076 SCTP_INP_INFO_WUNLOCK(); 3077 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3078 return (EINVAL); 3079 } 3080 /* ok we look clear to give out this port, so lets setup the binding */ 3081 if (bindall) { 3082 /* binding to all addresses, so just set in the proper flags */ 3083 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3084 /* set the automatic addr changes from kernel flag */ 3085 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3086 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3087 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3088 } else { 3089 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3090 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3091 } 3092 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3093 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3094 } else { 3095 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3096 } 3097 /* 3098 * set the automatic mobility_base from kernel flag (by 3099 * micchie) 3100 */ 3101 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3102 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3103 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3104 } else { 3105 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3106 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3107 } 3108 /* 3109 * set the automatic mobility_fasthandoff from kernel flag 3110 * (by micchie) 3111 */ 3112 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3113 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3114 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3115 } else { 3116 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3117 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3118 } 3119 } else { 3120 /* 3121 * bind specific, make sure flags is off and add a new 3122 * address structure to the sctp_addr_list inside the ep 3123 * structure. 3124 * 3125 * We will need to allocate one and insert it at the head. 3126 * The socketopt call can just insert new addresses in there 3127 * as well. It will also have to do the embed scope kame 3128 * hack too (before adding). 3129 */ 3130 struct sctp_ifa *ifa; 3131 union sctp_sockstore store; 3132 3133 memset(&store, 0, sizeof(store)); 3134 switch (addr->sa_family) { 3135 #ifdef INET 3136 case AF_INET: 3137 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3138 store.sin.sin_port = 0; 3139 break; 3140 #endif 3141 #ifdef INET6 3142 case AF_INET6: 3143 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3144 store.sin6.sin6_port = 0; 3145 break; 3146 #endif 3147 default: 3148 break; 3149 } 3150 /* 3151 * first find the interface with the bound address need to 3152 * zero out the port to find the address! yuck! can't do 3153 * this earlier since need port for sctp_pcb_findep() 3154 */ 3155 if (sctp_ifap != NULL) { 3156 ifa = sctp_ifap; 3157 } else { 3158 /* 3159 * Note for BSD we hit here always other O/S's will 3160 * pass things in via the sctp_ifap argument 3161 * (Panda). 3162 */ 3163 ifa = sctp_find_ifa_by_addr(&store.sa, 3164 vrf_id, SCTP_ADDR_NOT_LOCKED); 3165 } 3166 if (ifa == NULL) { 3167 /* Can't find an interface with that address */ 3168 SCTP_INP_WUNLOCK(inp); 3169 SCTP_INP_INFO_WUNLOCK(); 3170 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3171 return (EADDRNOTAVAIL); 3172 } 3173 #ifdef INET6 3174 if (addr->sa_family == AF_INET6) { 3175 /* GAK, more FIXME IFA lock? */ 3176 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3177 /* Can't bind a non-existent addr. */ 3178 SCTP_INP_WUNLOCK(inp); 3179 SCTP_INP_INFO_WUNLOCK(); 3180 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3181 return (EINVAL); 3182 } 3183 } 3184 #endif 3185 /* we're not bound all */ 3186 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3187 /* allow bindx() to send ASCONF's for binding changes */ 3188 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3189 /* clear automatic addr changes from kernel flag */ 3190 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3191 3192 /* add this address to the endpoint list */ 3193 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3194 if (error != 0) { 3195 SCTP_INP_WUNLOCK(inp); 3196 SCTP_INP_INFO_WUNLOCK(); 3197 return (error); 3198 } 3199 inp->laddr_count++; 3200 } 3201 /* find the bucket */ 3202 if (port_reuse_active) { 3203 /* Put it into tcp 1-2-1 hash */ 3204 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3205 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3206 } else { 3207 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3208 } 3209 /* put it in the bucket */ 3210 LIST_INSERT_HEAD(head, inp, sctp_hash); 3211 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3212 (void *)head, ntohs(lport), port_reuse_active); 3213 /* set in the port */ 3214 inp->sctp_lport = lport; 3215 3216 /* turn off just the unbound flag */ 3217 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3218 SCTP_INP_WUNLOCK(inp); 3219 SCTP_INP_INFO_WUNLOCK(); 3220 return (0); 3221 } 3222 3223 3224 static void 3225 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3226 { 3227 struct sctp_iterator *it, *nit; 3228 3229 /* 3230 * We enter with the only the ITERATOR_LOCK in place and a write 3231 * lock on the inp_info stuff. 3232 */ 3233 it = sctp_it_ctl.cur_it; 3234 if (it && (it->vn != curvnet)) { 3235 /* Its not looking at our VNET */ 3236 return; 3237 } 3238 if (it && (it->inp == inp)) { 3239 /* 3240 * This is tricky and we hold the iterator lock, but when it 3241 * returns and gets the lock (when we release it) the 3242 * iterator will try to operate on inp. We need to stop that 3243 * from happening. But of course the iterator has a 3244 * reference on the stcb and inp. We can mark it and it will 3245 * stop. 3246 * 3247 * If its a single iterator situation, we set the end 3248 * iterator flag. Otherwise we set the iterator to go to the 3249 * next inp. 3250 * 3251 */ 3252 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3253 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3254 } else { 3255 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3256 } 3257 } 3258 /* 3259 * Now go through and remove any single reference to our inp that 3260 * may be still pending on the list 3261 */ 3262 SCTP_IPI_ITERATOR_WQ_LOCK(); 3263 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3264 if (it->vn != curvnet) { 3265 continue; 3266 } 3267 if (it->inp == inp) { 3268 /* This one points to me is it inp specific? */ 3269 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3270 /* Remove and free this one */ 3271 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3272 it, sctp_nxt_itr); 3273 if (it->function_atend != NULL) { 3274 (*it->function_atend) (it->pointer, it->val); 3275 } 3276 SCTP_FREE(it, SCTP_M_ITER); 3277 } else { 3278 it->inp = LIST_NEXT(it->inp, sctp_list); 3279 if (it->inp) { 3280 SCTP_INP_INCR_REF(it->inp); 3281 } 3282 } 3283 /* 3284 * When its put in the refcnt is incremented so decr 3285 * it 3286 */ 3287 SCTP_INP_DECR_REF(inp); 3288 } 3289 } 3290 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3291 } 3292 3293 /* release sctp_inpcb unbind the port */ 3294 void 3295 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3296 { 3297 /* 3298 * Here we free a endpoint. We must find it (if it is in the Hash 3299 * table) and remove it from there. Then we must also find it in the 3300 * overall list and remove it from there. After all removals are 3301 * complete then any timer has to be stopped. Then start the actual 3302 * freeing. a) Any local lists. b) Any associations. c) The hash of 3303 * all associations. d) finally the ep itself. 3304 */ 3305 struct sctp_tcb *asoc, *nasoc; 3306 struct sctp_laddr *laddr, *nladdr; 3307 struct inpcb *ip_pcb; 3308 struct socket *so; 3309 int being_refed = 0; 3310 struct sctp_queued_to_read *sq, *nsq; 3311 int cnt; 3312 sctp_sharedkey_t *shared_key, *nshared_key; 3313 3314 3315 #ifdef SCTP_LOG_CLOSING 3316 sctp_log_closing(inp, NULL, 0); 3317 #endif 3318 SCTP_ITERATOR_LOCK(); 3319 /* mark any iterators on the list or being processed */ 3320 sctp_iterator_inp_being_freed(inp); 3321 SCTP_ITERATOR_UNLOCK(); 3322 so = inp->sctp_socket; 3323 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3324 /* been here before.. eeks.. get out of here */ 3325 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3326 #ifdef SCTP_LOG_CLOSING 3327 sctp_log_closing(inp, NULL, 1); 3328 #endif 3329 return; 3330 } 3331 SCTP_ASOC_CREATE_LOCK(inp); 3332 SCTP_INP_INFO_WLOCK(); 3333 3334 SCTP_INP_WLOCK(inp); 3335 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3336 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3337 /* socket is gone, so no more wakeups allowed */ 3338 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3339 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3340 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3341 3342 } 3343 /* First time through we have the socket lock, after that no more. */ 3344 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3345 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3346 3347 if (inp->control) { 3348 sctp_m_freem(inp->control); 3349 inp->control = NULL; 3350 } 3351 if (inp->pkt) { 3352 sctp_m_freem(inp->pkt); 3353 inp->pkt = NULL; 3354 } 3355 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3356 * here but I will be nice :> (i.e. 3357 * ip_pcb = ep;) */ 3358 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3359 int cnt_in_sd; 3360 3361 cnt_in_sd = 0; 3362 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3363 SCTP_TCB_LOCK(asoc); 3364 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3365 /* Skip guys being freed */ 3366 cnt_in_sd++; 3367 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3368 /* 3369 * Special case - we did not start a 3370 * kill timer on the asoc due to it 3371 * was not closed. So go ahead and 3372 * start it now. 3373 */ 3374 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3375 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3376 } 3377 SCTP_TCB_UNLOCK(asoc); 3378 continue; 3379 } 3380 if (((SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_WAIT) || 3381 (SCTP_GET_STATE(asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3382 (asoc->asoc.total_output_queue_size == 0)) { 3383 /* 3384 * If we have data in queue, we don't want 3385 * to just free since the app may have done, 3386 * send()/close or connect/send/close. And 3387 * it wants the data to get across first. 3388 */ 3389 /* Just abandon things in the front states */ 3390 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3391 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3392 cnt_in_sd++; 3393 } 3394 continue; 3395 } 3396 /* Disconnect the socket please */ 3397 asoc->sctp_socket = NULL; 3398 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_CLOSED_SOCKET); 3399 if ((asoc->asoc.size_on_reasm_queue > 0) || 3400 (asoc->asoc.control_pdapi) || 3401 (asoc->asoc.size_on_all_streams > 0) || 3402 (so && (so->so_rcv.sb_cc > 0))) { 3403 /* Left with Data unread */ 3404 struct mbuf *op_err; 3405 3406 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3407 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3408 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3409 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3410 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3411 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3412 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3413 } 3414 if (sctp_free_assoc(inp, asoc, 3415 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3416 cnt_in_sd++; 3417 } 3418 continue; 3419 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3420 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3421 (asoc->asoc.stream_queue_cnt == 0)) { 3422 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3423 goto abort_anyway; 3424 } 3425 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3426 (SCTP_GET_STATE(asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3427 struct sctp_nets *netp; 3428 3429 /* 3430 * there is nothing queued to send, 3431 * so I send shutdown 3432 */ 3433 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3434 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3435 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3436 } 3437 SCTP_SET_STATE(asoc, SCTP_STATE_SHUTDOWN_SENT); 3438 sctp_stop_timers_for_shutdown(asoc); 3439 if (asoc->asoc.alternate) { 3440 netp = asoc->asoc.alternate; 3441 } else { 3442 netp = asoc->asoc.primary_destination; 3443 } 3444 sctp_send_shutdown(asoc, netp); 3445 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3446 netp); 3447 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3448 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3449 } 3450 } else { 3451 /* mark into shutdown pending */ 3452 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_SHUTDOWN_PENDING); 3453 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, NULL); 3454 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3455 SCTP_ADD_SUBSTATE(asoc, SCTP_STATE_PARTIAL_MSG_LEFT); 3456 } 3457 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3458 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3459 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3460 struct mbuf *op_err; 3461 3462 abort_anyway: 3463 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3464 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3465 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3466 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3467 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3468 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3469 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3470 } 3471 if (sctp_free_assoc(inp, asoc, 3472 SCTP_PCBFREE_NOFORCE, 3473 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3474 cnt_in_sd++; 3475 } 3476 continue; 3477 } else { 3478 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3479 } 3480 } 3481 cnt_in_sd++; 3482 SCTP_TCB_UNLOCK(asoc); 3483 } 3484 /* now is there some left in our SHUTDOWN state? */ 3485 if (cnt_in_sd) { 3486 #ifdef SCTP_LOG_CLOSING 3487 sctp_log_closing(inp, NULL, 2); 3488 #endif 3489 inp->sctp_socket = NULL; 3490 SCTP_INP_WUNLOCK(inp); 3491 SCTP_ASOC_CREATE_UNLOCK(inp); 3492 SCTP_INP_INFO_WUNLOCK(); 3493 return; 3494 } 3495 } 3496 inp->sctp_socket = NULL; 3497 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3498 SCTP_PCB_FLAGS_UNBOUND) { 3499 /* 3500 * ok, this guy has been bound. It's port is somewhere in 3501 * the SCTP_BASE_INFO(hash table). Remove it! 3502 */ 3503 LIST_REMOVE(inp, sctp_hash); 3504 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3505 } 3506 3507 /* 3508 * If there is a timer running to kill us, forget it, since it may 3509 * have a contest on the INP lock.. which would cause us to die ... 3510 */ 3511 cnt = 0; 3512 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3513 SCTP_TCB_LOCK(asoc); 3514 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3515 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3516 SCTP_CLEAR_SUBSTATE(asoc, SCTP_STATE_IN_ACCEPT_QUEUE); 3517 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3518 } 3519 cnt++; 3520 SCTP_TCB_UNLOCK(asoc); 3521 continue; 3522 } 3523 /* Free associations that are NOT killing us */ 3524 if ((SCTP_GET_STATE(asoc) != SCTP_STATE_COOKIE_WAIT) && 3525 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3526 struct mbuf *op_err; 3527 3528 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3529 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3530 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3531 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3532 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3533 cnt++; 3534 SCTP_TCB_UNLOCK(asoc); 3535 continue; 3536 } 3537 if ((SCTP_GET_STATE(asoc) == SCTP_STATE_OPEN) || 3538 (SCTP_GET_STATE(asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3539 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3540 } 3541 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3542 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3543 cnt++; 3544 } 3545 } 3546 if (cnt) { 3547 /* Ok we have someone out there that will kill us */ 3548 #ifdef SCTP_LOG_CLOSING 3549 sctp_log_closing(inp, NULL, 3); 3550 #endif 3551 SCTP_INP_WUNLOCK(inp); 3552 SCTP_ASOC_CREATE_UNLOCK(inp); 3553 SCTP_INP_INFO_WUNLOCK(); 3554 return; 3555 } 3556 if (SCTP_INP_LOCK_CONTENDED(inp)) 3557 being_refed++; 3558 if (SCTP_INP_READ_CONTENDED(inp)) 3559 being_refed++; 3560 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3561 being_refed++; 3562 3563 if ((inp->refcount) || 3564 (being_refed) || 3565 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3566 #ifdef SCTP_LOG_CLOSING 3567 sctp_log_closing(inp, NULL, 4); 3568 #endif 3569 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3570 SCTP_INP_WUNLOCK(inp); 3571 SCTP_ASOC_CREATE_UNLOCK(inp); 3572 SCTP_INP_INFO_WUNLOCK(); 3573 return; 3574 } 3575 inp->sctp_ep.signature_change.type = 0; 3576 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3577 /* 3578 * Remove it from the list .. last thing we need a lock for. 3579 */ 3580 LIST_REMOVE(inp, sctp_list); 3581 SCTP_INP_WUNLOCK(inp); 3582 SCTP_ASOC_CREATE_UNLOCK(inp); 3583 SCTP_INP_INFO_WUNLOCK(); 3584 /* 3585 * Now we release all locks. Since this INP cannot be found anymore 3586 * except possibly by the kill timer that might be running. We call 3587 * the drain function here. It should hit the case were it sees the 3588 * ACTIVE flag cleared and exit out freeing us to proceed and 3589 * destroy everything. 3590 */ 3591 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3592 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3593 } else { 3594 /* Probably un-needed */ 3595 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3596 } 3597 3598 #ifdef SCTP_LOG_CLOSING 3599 sctp_log_closing(inp, NULL, 5); 3600 #endif 3601 3602 3603 if ((inp->sctp_asocidhash) != NULL) { 3604 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3605 inp->sctp_asocidhash = NULL; 3606 } 3607 /* sa_ignore FREED_MEMORY */ 3608 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3609 /* Its only abandoned if it had data left */ 3610 if (sq->length) 3611 SCTP_STAT_INCR(sctps_left_abandon); 3612 3613 TAILQ_REMOVE(&inp->read_queue, sq, next); 3614 sctp_free_remote_addr(sq->whoFrom); 3615 if (so) 3616 so->so_rcv.sb_cc -= sq->length; 3617 if (sq->data) { 3618 sctp_m_freem(sq->data); 3619 sq->data = NULL; 3620 } 3621 /* 3622 * no need to free the net count, since at this point all 3623 * assoc's are gone. 3624 */ 3625 sctp_free_a_readq(NULL, sq); 3626 } 3627 /* Now the sctp_pcb things */ 3628 /* 3629 * free each asoc if it is not already closed/free. we can't use the 3630 * macro here since le_next will get freed as part of the 3631 * sctp_free_assoc() call. 3632 */ 3633 if (ip_pcb->inp_options) { 3634 (void)sctp_m_free(ip_pcb->inp_options); 3635 ip_pcb->inp_options = 0; 3636 } 3637 3638 3639 #ifdef INET6 3640 if (ip_pcb->inp_vflag & INP_IPV6) { 3641 ip6_freepcbopts(ip_pcb->in6p_outputopts); 3642 } 3643 #endif /* INET6 */ 3644 ip_pcb->inp_vflag = 0; 3645 /* free up authentication fields */ 3646 if (inp->sctp_ep.local_auth_chunks != NULL) 3647 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3648 if (inp->sctp_ep.local_hmacs != NULL) 3649 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3650 3651 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3652 LIST_REMOVE(shared_key, next); 3653 sctp_free_sharedkey(shared_key); 3654 /* sa_ignore FREED_MEMORY */ 3655 } 3656 3657 /* 3658 * if we have an address list the following will free the list of 3659 * ifaddr's that are set into this ep. Again macro limitations here, 3660 * since the LIST_FOREACH could be a bad idea. 3661 */ 3662 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3663 sctp_remove_laddr(laddr); 3664 } 3665 3666 #ifdef SCTP_TRACK_FREED_ASOCS 3667 /* TEMP CODE */ 3668 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3669 LIST_REMOVE(asoc, sctp_tcblist); 3670 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3671 SCTP_DECR_ASOC_COUNT(); 3672 } 3673 /* *** END TEMP CODE *** */ 3674 #endif 3675 /* Now lets see about freeing the EP hash table. */ 3676 if (inp->sctp_tcbhash != NULL) { 3677 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3678 inp->sctp_tcbhash = NULL; 3679 } 3680 /* Now we must put the ep memory back into the zone pool */ 3681 crfree(inp->ip_inp.inp.inp_cred); 3682 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3683 SCTP_INP_LOCK_DESTROY(inp); 3684 SCTP_INP_READ_DESTROY(inp); 3685 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3686 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3687 SCTP_DECR_EP_COUNT(); 3688 } 3689 3690 3691 struct sctp_nets * 3692 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3693 { 3694 struct sctp_nets *net; 3695 3696 /* locate the address */ 3697 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3698 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3699 return (net); 3700 } 3701 return (NULL); 3702 } 3703 3704 3705 int 3706 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3707 { 3708 struct sctp_ifa *sctp_ifa; 3709 3710 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3711 if (sctp_ifa) { 3712 return (1); 3713 } else { 3714 return (0); 3715 } 3716 } 3717 3718 /* 3719 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3720 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3721 * stats of stuff. 3722 */ 3723 int 3724 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3725 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3726 { 3727 /* 3728 * The following is redundant to the same lines in the 3729 * sctp_aloc_assoc() but is needed since others call the add address 3730 * function 3731 */ 3732 struct sctp_nets *net, *netfirst; 3733 int addr_inscope; 3734 3735 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3736 from); 3737 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3738 3739 netfirst = sctp_findnet(stcb, newaddr); 3740 if (netfirst) { 3741 /* 3742 * Lie and return ok, we don't want to make the association 3743 * go away for this behavior. It will happen in the TCP 3744 * model in a connected socket. It does not reach the hash 3745 * table until after the association is built so it can't be 3746 * found. Mark as reachable, since the initial creation will 3747 * have been cleared and the NOT_IN_ASSOC flag will have 3748 * been added... and we don't want to end up removing it 3749 * back out. 3750 */ 3751 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3752 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3753 SCTP_ADDR_UNCONFIRMED); 3754 } else { 3755 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3756 } 3757 3758 return (0); 3759 } 3760 addr_inscope = 1; 3761 switch (newaddr->sa_family) { 3762 #ifdef INET 3763 case AF_INET: 3764 { 3765 struct sockaddr_in *sin; 3766 3767 sin = (struct sockaddr_in *)newaddr; 3768 if (sin->sin_addr.s_addr == 0) { 3769 /* Invalid address */ 3770 return (-1); 3771 } 3772 /* zero out the zero area */ 3773 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3774 3775 /* assure len is set */ 3776 sin->sin_len = sizeof(struct sockaddr_in); 3777 if (set_scope) { 3778 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3779 stcb->asoc.scope.ipv4_local_scope = 1; 3780 } 3781 } else { 3782 /* Validate the address is in scope */ 3783 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3784 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3785 addr_inscope = 0; 3786 } 3787 } 3788 break; 3789 } 3790 #endif 3791 #ifdef INET6 3792 case AF_INET6: 3793 { 3794 struct sockaddr_in6 *sin6; 3795 3796 sin6 = (struct sockaddr_in6 *)newaddr; 3797 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3798 /* Invalid address */ 3799 return (-1); 3800 } 3801 /* assure len is set */ 3802 sin6->sin6_len = sizeof(struct sockaddr_in6); 3803 if (set_scope) { 3804 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3805 stcb->asoc.scope.loopback_scope = 1; 3806 stcb->asoc.scope.local_scope = 0; 3807 stcb->asoc.scope.ipv4_local_scope = 1; 3808 stcb->asoc.scope.site_scope = 1; 3809 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3810 /* 3811 * If the new destination is a 3812 * LINK_LOCAL we must have common 3813 * site scope. Don't set the local 3814 * scope since we may not share all 3815 * links, only loopback can do this. 3816 * Links on the local network would 3817 * also be on our private network 3818 * for v4 too. 3819 */ 3820 stcb->asoc.scope.ipv4_local_scope = 1; 3821 stcb->asoc.scope.site_scope = 1; 3822 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3823 /* 3824 * If the new destination is 3825 * SITE_LOCAL then we must have site 3826 * scope in common. 3827 */ 3828 stcb->asoc.scope.site_scope = 1; 3829 } 3830 } else { 3831 /* Validate the address is in scope */ 3832 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3833 (stcb->asoc.scope.loopback_scope == 0)) { 3834 addr_inscope = 0; 3835 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3836 (stcb->asoc.scope.local_scope == 0)) { 3837 addr_inscope = 0; 3838 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3839 (stcb->asoc.scope.site_scope == 0)) { 3840 addr_inscope = 0; 3841 } 3842 } 3843 break; 3844 } 3845 #endif 3846 default: 3847 /* not supported family type */ 3848 return (-1); 3849 } 3850 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3851 if (net == NULL) { 3852 return (-1); 3853 } 3854 SCTP_INCR_RADDR_COUNT(); 3855 memset(net, 0, sizeof(struct sctp_nets)); 3856 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3857 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3858 switch (newaddr->sa_family) { 3859 #ifdef INET 3860 case AF_INET: 3861 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3862 break; 3863 #endif 3864 #ifdef INET6 3865 case AF_INET6: 3866 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3867 break; 3868 #endif 3869 default: 3870 break; 3871 } 3872 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3873 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3874 stcb->asoc.scope.loopback_scope = 1; 3875 stcb->asoc.scope.ipv4_local_scope = 1; 3876 stcb->asoc.scope.local_scope = 0; 3877 stcb->asoc.scope.site_scope = 1; 3878 addr_inscope = 1; 3879 } 3880 net->failure_threshold = stcb->asoc.def_net_failure; 3881 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3882 if (addr_inscope == 0) { 3883 net->dest_state = (SCTP_ADDR_REACHABLE | 3884 SCTP_ADDR_OUT_OF_SCOPE); 3885 } else { 3886 if (from == SCTP_ADDR_IS_CONFIRMED) 3887 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3888 net->dest_state = SCTP_ADDR_REACHABLE; 3889 else 3890 net->dest_state = SCTP_ADDR_REACHABLE | 3891 SCTP_ADDR_UNCONFIRMED; 3892 } 3893 /* 3894 * We set this to 0, the timer code knows that this means its an 3895 * initial value 3896 */ 3897 net->rto_needed = 1; 3898 net->RTO = 0; 3899 net->RTO_measured = 0; 3900 stcb->asoc.numnets++; 3901 net->ref_count = 1; 3902 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3903 net->port = port; 3904 net->dscp = stcb->asoc.default_dscp; 3905 #ifdef INET6 3906 net->flowlabel = stcb->asoc.default_flowlabel; 3907 #endif 3908 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3909 net->dest_state |= SCTP_ADDR_NOHB; 3910 } else { 3911 net->dest_state &= ~SCTP_ADDR_NOHB; 3912 } 3913 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3914 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3915 } else { 3916 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3917 } 3918 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3919 /* Init the timer structure */ 3920 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3921 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3922 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3923 3924 /* Now generate a route for this guy */ 3925 #ifdef INET6 3926 /* KAME hack: embed scopeid */ 3927 if (newaddr->sa_family == AF_INET6) { 3928 struct sockaddr_in6 *sin6; 3929 3930 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3931 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3932 sin6->sin6_scope_id = 0; 3933 } 3934 #endif 3935 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3936 stcb->asoc.vrf_id, 3937 stcb->sctp_ep->fibnum); 3938 3939 net->src_addr_selected = 0; 3940 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3941 /* Get source address */ 3942 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3943 stcb, 3944 (sctp_route_t *)&net->ro, 3945 net, 3946 0, 3947 stcb->asoc.vrf_id); 3948 if (stcb->asoc.default_mtu > 0) { 3949 net->mtu = stcb->asoc.default_mtu; 3950 switch (net->ro._l_addr.sa.sa_family) { 3951 #ifdef INET 3952 case AF_INET: 3953 net->mtu += SCTP_MIN_V4_OVERHEAD; 3954 break; 3955 #endif 3956 #ifdef INET6 3957 case AF_INET6: 3958 net->mtu += SCTP_MIN_OVERHEAD; 3959 break; 3960 #endif 3961 default: 3962 break; 3963 } 3964 #if defined(INET) || defined(INET6) 3965 if (net->port) { 3966 net->mtu += (uint32_t)sizeof(struct udphdr); 3967 } 3968 #endif 3969 } else if (net->ro._s_addr != NULL) { 3970 uint32_t imtu, rmtu, hcmtu; 3971 3972 net->src_addr_selected = 1; 3973 /* Now get the interface MTU */ 3974 if (net->ro._s_addr->ifn_p != NULL) { 3975 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3976 } else { 3977 imtu = 0; 3978 } 3979 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3980 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3981 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3982 if (rmtu == 0) { 3983 /* 3984 * Start things off to match mtu of 3985 * interface please. 3986 */ 3987 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3988 net->ro.ro_rt, net->mtu); 3989 } 3990 } 3991 } 3992 if (net->mtu == 0) { 3993 if (stcb->asoc.default_mtu > 0) { 3994 net->mtu = stcb->asoc.default_mtu; 3995 switch (net->ro._l_addr.sa.sa_family) { 3996 #ifdef INET 3997 case AF_INET: 3998 net->mtu += SCTP_MIN_V4_OVERHEAD; 3999 break; 4000 #endif 4001 #ifdef INET6 4002 case AF_INET6: 4003 net->mtu += SCTP_MIN_OVERHEAD; 4004 break; 4005 #endif 4006 default: 4007 break; 4008 } 4009 #if defined(INET) || defined(INET6) 4010 if (net->port) { 4011 net->mtu += (uint32_t)sizeof(struct udphdr); 4012 } 4013 #endif 4014 } else { 4015 switch (newaddr->sa_family) { 4016 #ifdef INET 4017 case AF_INET: 4018 net->mtu = SCTP_DEFAULT_MTU; 4019 break; 4020 #endif 4021 #ifdef INET6 4022 case AF_INET6: 4023 net->mtu = 1280; 4024 break; 4025 #endif 4026 default: 4027 break; 4028 } 4029 } 4030 } 4031 #if defined(INET) || defined(INET6) 4032 if (net->port) { 4033 net->mtu -= (uint32_t)sizeof(struct udphdr); 4034 } 4035 #endif 4036 if (from == SCTP_ALLOC_ASOC) { 4037 stcb->asoc.smallest_mtu = net->mtu; 4038 } 4039 if (stcb->asoc.smallest_mtu > net->mtu) { 4040 sctp_pathmtu_adjustment(stcb, net->mtu); 4041 } 4042 #ifdef INET6 4043 if (newaddr->sa_family == AF_INET6) { 4044 struct sockaddr_in6 *sin6; 4045 4046 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4047 (void)sa6_recoverscope(sin6); 4048 } 4049 #endif 4050 4051 /* JRS - Use the congestion control given in the CC module */ 4052 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4053 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4054 4055 /* 4056 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4057 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4058 */ 4059 net->find_pseudo_cumack = 1; 4060 net->find_rtx_pseudo_cumack = 1; 4061 /* Choose an initial flowid. */ 4062 net->flowid = stcb->asoc.my_vtag ^ 4063 ntohs(stcb->rport) ^ 4064 ntohs(stcb->sctp_ep->sctp_lport); 4065 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4066 if (netp) { 4067 *netp = net; 4068 } 4069 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4070 if (net->ro.ro_rt == NULL) { 4071 /* Since we have no route put it at the back */ 4072 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4073 } else if (netfirst == NULL) { 4074 /* We are the first one in the pool. */ 4075 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4076 } else if (netfirst->ro.ro_rt == NULL) { 4077 /* 4078 * First one has NO route. Place this one ahead of the first 4079 * one. 4080 */ 4081 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4082 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4083 /* 4084 * This one has a different interface than the one at the 4085 * top of the list. Place it ahead. 4086 */ 4087 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4088 } else { 4089 /* 4090 * Ok we have the same interface as the first one. Move 4091 * forward until we find either a) one with a NULL route... 4092 * insert ahead of that b) one with a different ifp.. insert 4093 * after that. c) end of the list.. insert at the tail. 4094 */ 4095 struct sctp_nets *netlook; 4096 4097 do { 4098 netlook = TAILQ_NEXT(netfirst, sctp_next); 4099 if (netlook == NULL) { 4100 /* End of the list */ 4101 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4102 break; 4103 } else if (netlook->ro.ro_rt == NULL) { 4104 /* next one has NO route */ 4105 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4106 break; 4107 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4108 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4109 net, sctp_next); 4110 break; 4111 } 4112 /* Shift forward */ 4113 netfirst = netlook; 4114 } while (netlook != NULL); 4115 } 4116 4117 /* got to have a primary set */ 4118 if (stcb->asoc.primary_destination == 0) { 4119 stcb->asoc.primary_destination = net; 4120 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4121 (net->ro.ro_rt) && 4122 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4123 /* No route to current primary adopt new primary */ 4124 stcb->asoc.primary_destination = net; 4125 } 4126 /* Validate primary is first */ 4127 net = TAILQ_FIRST(&stcb->asoc.nets); 4128 if ((net != stcb->asoc.primary_destination) && 4129 (stcb->asoc.primary_destination)) { 4130 /* 4131 * first one on the list is NOT the primary sctp_cmpaddr() 4132 * is much more efficient if the primary is the first on the 4133 * list, make it so. 4134 */ 4135 TAILQ_REMOVE(&stcb->asoc.nets, 4136 stcb->asoc.primary_destination, sctp_next); 4137 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4138 stcb->asoc.primary_destination, sctp_next); 4139 } 4140 return (0); 4141 } 4142 4143 4144 static uint32_t 4145 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4146 { 4147 uint32_t id; 4148 struct sctpasochead *head; 4149 struct sctp_tcb *lstcb; 4150 4151 try_again: 4152 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4153 /* TSNH */ 4154 return (0); 4155 } 4156 /* 4157 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4158 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4159 */ 4160 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4161 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4162 } 4163 id = inp->sctp_associd_counter; 4164 inp->sctp_associd_counter++; 4165 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t)id, 0); 4166 if (lstcb) { 4167 goto try_again; 4168 } 4169 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4170 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4171 stcb->asoc.in_asocid_hash = 1; 4172 return (id); 4173 } 4174 4175 /* 4176 * allocate an association and add it to the endpoint. The caller must be 4177 * careful to add all additional addresses once they are know right away or 4178 * else the assoc will be may experience a blackout scenario. 4179 */ 4180 struct sctp_tcb * 4181 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4182 int *error, uint32_t override_tag, uint32_t vrf_id, 4183 uint16_t o_streams, uint16_t port, 4184 struct thread *p, 4185 int initialize_auth_params) 4186 { 4187 /* note the p argument is only valid in unbound sockets */ 4188 4189 struct sctp_tcb *stcb; 4190 struct sctp_association *asoc; 4191 struct sctpasochead *head; 4192 uint16_t rport; 4193 int err; 4194 4195 /* 4196 * Assumption made here: Caller has done a 4197 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4198 * address does not exist already. 4199 */ 4200 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4201 /* Hit max assoc, sorry no more */ 4202 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4203 *error = ENOBUFS; 4204 return (NULL); 4205 } 4206 if (firstaddr == NULL) { 4207 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4208 *error = EINVAL; 4209 return (NULL); 4210 } 4211 SCTP_INP_RLOCK(inp); 4212 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4213 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4214 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4215 /* 4216 * If its in the TCP pool, its NOT allowed to create an 4217 * association. The parent listener needs to call 4218 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4219 * off, or connected one does this.. its an error. 4220 */ 4221 SCTP_INP_RUNLOCK(inp); 4222 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4223 *error = EINVAL; 4224 return (NULL); 4225 } 4226 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4227 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4228 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4229 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4230 SCTP_INP_RUNLOCK(inp); 4231 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4232 *error = EINVAL; 4233 return (NULL); 4234 } 4235 } 4236 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4237 #ifdef SCTP_DEBUG 4238 if (firstaddr) { 4239 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4240 switch (firstaddr->sa_family) { 4241 #ifdef INET 4242 case AF_INET: 4243 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4244 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4245 break; 4246 #endif 4247 #ifdef INET6 4248 case AF_INET6: 4249 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4250 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4251 break; 4252 #endif 4253 default: 4254 break; 4255 } 4256 } else { 4257 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4258 } 4259 #endif /* SCTP_DEBUG */ 4260 switch (firstaddr->sa_family) { 4261 #ifdef INET 4262 case AF_INET: 4263 { 4264 struct sockaddr_in *sin; 4265 4266 sin = (struct sockaddr_in *)firstaddr; 4267 if ((ntohs(sin->sin_port) == 0) || 4268 (sin->sin_addr.s_addr == INADDR_ANY) || 4269 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4270 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4271 /* Invalid address */ 4272 SCTP_INP_RUNLOCK(inp); 4273 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4274 *error = EINVAL; 4275 return (NULL); 4276 } 4277 rport = sin->sin_port; 4278 break; 4279 } 4280 #endif 4281 #ifdef INET6 4282 case AF_INET6: 4283 { 4284 struct sockaddr_in6 *sin6; 4285 4286 sin6 = (struct sockaddr_in6 *)firstaddr; 4287 if ((ntohs(sin6->sin6_port) == 0) || 4288 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4289 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4290 /* Invalid address */ 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 rport = sin6->sin6_port; 4297 break; 4298 } 4299 #endif 4300 default: 4301 /* not supported family type */ 4302 SCTP_INP_RUNLOCK(inp); 4303 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4304 *error = EINVAL; 4305 return (NULL); 4306 } 4307 SCTP_INP_RUNLOCK(inp); 4308 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4309 /* 4310 * If you have not performed a bind, then we need to do the 4311 * ephemeral bind for you. 4312 */ 4313 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4314 (struct sockaddr *)NULL, 4315 (struct sctp_ifa *)NULL, 4316 p 4317 ))) { 4318 /* bind error, probably perm */ 4319 *error = err; 4320 return (NULL); 4321 } 4322 } 4323 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4324 if (stcb == NULL) { 4325 /* out of memory? */ 4326 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4327 *error = ENOMEM; 4328 return (NULL); 4329 } 4330 SCTP_INCR_ASOC_COUNT(); 4331 4332 memset(stcb, 0, sizeof(*stcb)); 4333 asoc = &stcb->asoc; 4334 4335 SCTP_TCB_LOCK_INIT(stcb); 4336 SCTP_TCB_SEND_LOCK_INIT(stcb); 4337 stcb->rport = rport; 4338 /* setup back pointer's */ 4339 stcb->sctp_ep = inp; 4340 stcb->sctp_socket = inp->sctp_socket; 4341 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4342 /* failed */ 4343 SCTP_TCB_LOCK_DESTROY(stcb); 4344 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4345 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4346 SCTP_DECR_ASOC_COUNT(); 4347 *error = err; 4348 return (NULL); 4349 } 4350 /* and the port */ 4351 SCTP_INP_INFO_WLOCK(); 4352 SCTP_INP_WLOCK(inp); 4353 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4354 /* inpcb freed while alloc going on */ 4355 SCTP_TCB_LOCK_DESTROY(stcb); 4356 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4357 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4358 SCTP_INP_WUNLOCK(inp); 4359 SCTP_INP_INFO_WUNLOCK(); 4360 SCTP_DECR_ASOC_COUNT(); 4361 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4362 *error = EINVAL; 4363 return (NULL); 4364 } 4365 SCTP_TCB_LOCK(stcb); 4366 4367 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4368 /* now that my_vtag is set, add it to the hash */ 4369 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4370 /* put it in the bucket in the vtag hash of assoc's for the system */ 4371 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4372 SCTP_INP_INFO_WUNLOCK(); 4373 4374 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4375 /* failure.. memory error? */ 4376 if (asoc->strmout) { 4377 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4378 asoc->strmout = NULL; 4379 } 4380 if (asoc->mapping_array) { 4381 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4382 asoc->mapping_array = NULL; 4383 } 4384 if (asoc->nr_mapping_array) { 4385 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4386 asoc->nr_mapping_array = NULL; 4387 } 4388 SCTP_DECR_ASOC_COUNT(); 4389 SCTP_TCB_UNLOCK(stcb); 4390 SCTP_TCB_LOCK_DESTROY(stcb); 4391 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4392 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4393 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4394 SCTP_INP_WUNLOCK(inp); 4395 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4396 *error = ENOBUFS; 4397 return (NULL); 4398 } 4399 /* Init all the timers */ 4400 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4401 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4402 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4403 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4404 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4405 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4406 4407 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4408 /* now file the port under the hash as well */ 4409 if (inp->sctp_tcbhash != NULL) { 4410 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4411 inp->sctp_hashmark)]; 4412 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4413 } 4414 if (initialize_auth_params == SCTP_INITIALIZE_AUTH_PARAMS) { 4415 sctp_initialize_auth_params(inp, stcb); 4416 } 4417 SCTP_INP_WUNLOCK(inp); 4418 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4419 return (stcb); 4420 } 4421 4422 4423 void 4424 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4425 { 4426 struct sctp_inpcb *inp; 4427 struct sctp_association *asoc; 4428 4429 inp = stcb->sctp_ep; 4430 asoc = &stcb->asoc; 4431 asoc->numnets--; 4432 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4433 if (net == asoc->primary_destination) { 4434 /* Reset primary */ 4435 struct sctp_nets *lnet; 4436 4437 lnet = TAILQ_FIRST(&asoc->nets); 4438 /* 4439 * Mobility adaptation Ideally, if deleted destination is 4440 * the primary, it becomes a fast retransmission trigger by 4441 * the subsequent SET PRIMARY. (by micchie) 4442 */ 4443 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4444 SCTP_MOBILITY_BASE) || 4445 sctp_is_mobility_feature_on(stcb->sctp_ep, 4446 SCTP_MOBILITY_FASTHANDOFF)) { 4447 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4448 if (asoc->deleted_primary != NULL) { 4449 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4450 goto out; 4451 } 4452 asoc->deleted_primary = net; 4453 atomic_add_int(&net->ref_count, 1); 4454 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4455 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4456 sctp_mobility_feature_on(stcb->sctp_ep, 4457 SCTP_MOBILITY_PRIM_DELETED); 4458 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4459 stcb->sctp_ep, stcb, NULL); 4460 } 4461 out: 4462 /* Try to find a confirmed primary */ 4463 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4464 } 4465 if (net == asoc->last_data_chunk_from) { 4466 /* Reset primary */ 4467 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4468 } 4469 if (net == asoc->last_control_chunk_from) { 4470 /* Clear net */ 4471 asoc->last_control_chunk_from = NULL; 4472 } 4473 if (net == stcb->asoc.alternate) { 4474 sctp_free_remote_addr(stcb->asoc.alternate); 4475 stcb->asoc.alternate = NULL; 4476 } 4477 sctp_timer_stop(SCTP_TIMER_TYPE_PATHMTURAISE, inp, stcb, net, 4478 SCTP_FROM_SCTP_PCB + SCTP_LOC_9); 4479 sctp_timer_stop(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net, 4480 SCTP_FROM_SCTP_PCB + SCTP_LOC_10); 4481 net->dest_state |= SCTP_ADDR_BEING_DELETED; 4482 sctp_free_remote_addr(net); 4483 } 4484 4485 /* 4486 * remove a remote endpoint address from an association, it will fail if the 4487 * address does not exist. 4488 */ 4489 int 4490 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4491 { 4492 /* 4493 * Here we need to remove a remote address. This is quite simple, we 4494 * first find it in the list of address for the association 4495 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4496 * on that item. Note we do not allow it to be removed if there are 4497 * no other addresses. 4498 */ 4499 struct sctp_association *asoc; 4500 struct sctp_nets *net, *nnet; 4501 4502 asoc = &stcb->asoc; 4503 4504 /* locate the address */ 4505 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4506 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4507 continue; 4508 } 4509 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4510 remaddr)) { 4511 /* we found the guy */ 4512 if (asoc->numnets < 2) { 4513 /* Must have at LEAST two remote addresses */ 4514 return (-1); 4515 } else { 4516 sctp_remove_net(stcb, net); 4517 return (0); 4518 } 4519 } 4520 } 4521 /* not found. */ 4522 return (-2); 4523 } 4524 4525 void 4526 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4527 { 4528 struct sctpvtaghead *chain; 4529 struct sctp_tagblock *twait_block; 4530 int found = 0; 4531 int i; 4532 4533 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4534 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4535 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4536 if ((twait_block->vtag_block[i].v_tag == tag) && 4537 (twait_block->vtag_block[i].lport == lport) && 4538 (twait_block->vtag_block[i].rport == rport)) { 4539 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4540 twait_block->vtag_block[i].v_tag = 0; 4541 twait_block->vtag_block[i].lport = 0; 4542 twait_block->vtag_block[i].rport = 0; 4543 found = 1; 4544 break; 4545 } 4546 } 4547 if (found) 4548 break; 4549 } 4550 } 4551 4552 int 4553 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4554 { 4555 struct sctpvtaghead *chain; 4556 struct sctp_tagblock *twait_block; 4557 int found = 0; 4558 int i; 4559 4560 SCTP_INP_INFO_WLOCK(); 4561 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4562 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4563 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4564 if ((twait_block->vtag_block[i].v_tag == tag) && 4565 (twait_block->vtag_block[i].lport == lport) && 4566 (twait_block->vtag_block[i].rport == rport)) { 4567 found = 1; 4568 break; 4569 } 4570 } 4571 if (found) 4572 break; 4573 } 4574 SCTP_INP_INFO_WUNLOCK(); 4575 return (found); 4576 } 4577 4578 4579 void 4580 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4581 { 4582 struct sctpvtaghead *chain; 4583 struct sctp_tagblock *twait_block; 4584 struct timeval now; 4585 int set, i; 4586 4587 if (time == 0) { 4588 /* Its disabled */ 4589 return; 4590 } 4591 (void)SCTP_GETTIME_TIMEVAL(&now); 4592 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4593 set = 0; 4594 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4595 /* Block(s) present, lets find space, and expire on the fly */ 4596 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4597 if ((twait_block->vtag_block[i].v_tag == 0) && 4598 !set) { 4599 twait_block->vtag_block[i].tv_sec_at_expire = 4600 now.tv_sec + time; 4601 twait_block->vtag_block[i].v_tag = tag; 4602 twait_block->vtag_block[i].lport = lport; 4603 twait_block->vtag_block[i].rport = rport; 4604 set = 1; 4605 } else if ((twait_block->vtag_block[i].v_tag) && 4606 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4607 /* Audit expires this guy */ 4608 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4609 twait_block->vtag_block[i].v_tag = 0; 4610 twait_block->vtag_block[i].lport = 0; 4611 twait_block->vtag_block[i].rport = 0; 4612 if (set == 0) { 4613 /* Reuse it for my new tag */ 4614 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4615 twait_block->vtag_block[i].v_tag = tag; 4616 twait_block->vtag_block[i].lport = lport; 4617 twait_block->vtag_block[i].rport = rport; 4618 set = 1; 4619 } 4620 } 4621 } 4622 if (set) { 4623 /* 4624 * We only do up to the block where we can place our 4625 * tag for audits 4626 */ 4627 break; 4628 } 4629 } 4630 /* Need to add a new block to chain */ 4631 if (!set) { 4632 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4633 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4634 if (twait_block == NULL) { 4635 return; 4636 } 4637 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4638 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4639 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4640 twait_block->vtag_block[0].v_tag = tag; 4641 twait_block->vtag_block[0].lport = lport; 4642 twait_block->vtag_block[0].rport = rport; 4643 } 4644 } 4645 4646 void 4647 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4648 { 4649 struct sctp_tmit_chunk *chk, *nchk; 4650 struct sctp_queued_to_read *control, *ncontrol; 4651 4652 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4653 TAILQ_REMOVE(rh, control, next_instrm); 4654 control->on_strm_q = 0; 4655 if (control->on_read_q == 0) { 4656 sctp_free_remote_addr(control->whoFrom); 4657 if (control->data) { 4658 sctp_m_freem(control->data); 4659 control->data = NULL; 4660 } 4661 } 4662 /* Reassembly free? */ 4663 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4664 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4665 if (chk->data) { 4666 sctp_m_freem(chk->data); 4667 chk->data = NULL; 4668 } 4669 if (chk->holds_key_ref) 4670 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4671 sctp_free_remote_addr(chk->whoTo); 4672 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4673 SCTP_DECR_CHK_COUNT(); 4674 /* sa_ignore FREED_MEMORY */ 4675 } 4676 /* 4677 * We don't free the address here since all the net's were 4678 * freed above. 4679 */ 4680 if (control->on_read_q == 0) { 4681 sctp_free_a_readq(stcb, control); 4682 } 4683 } 4684 } 4685 4686 4687 /*- 4688 * Free the association after un-hashing the remote port. This 4689 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4690 * expect that the input to this function IS a locked TCB. 4691 * It will return 0, if it did NOT destroy the association (instead 4692 * it unlocks it. It will return NON-zero if it either destroyed the 4693 * association OR the association is already destroyed. 4694 */ 4695 int 4696 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4697 { 4698 int i; 4699 struct sctp_association *asoc; 4700 struct sctp_nets *net, *nnet; 4701 struct sctp_laddr *laddr, *naddr; 4702 struct sctp_tmit_chunk *chk, *nchk; 4703 struct sctp_asconf_addr *aparam, *naparam; 4704 struct sctp_asconf_ack *aack, *naack; 4705 struct sctp_stream_reset_list *strrst, *nstrrst; 4706 struct sctp_queued_to_read *sq, *nsq; 4707 struct sctp_stream_queue_pending *sp, *nsp; 4708 sctp_sharedkey_t *shared_key, *nshared_key; 4709 struct socket *so; 4710 4711 /* first, lets purge the entry from the hash table. */ 4712 4713 #ifdef SCTP_LOG_CLOSING 4714 sctp_log_closing(inp, stcb, 6); 4715 #endif 4716 if (stcb->asoc.state == 0) { 4717 #ifdef SCTP_LOG_CLOSING 4718 sctp_log_closing(inp, NULL, 7); 4719 #endif 4720 /* there is no asoc, really TSNH :-0 */ 4721 return (1); 4722 } 4723 if (stcb->asoc.alternate) { 4724 sctp_free_remote_addr(stcb->asoc.alternate); 4725 stcb->asoc.alternate = NULL; 4726 } 4727 /* TEMP CODE */ 4728 if (stcb->freed_from_where == 0) { 4729 /* Only record the first place free happened from */ 4730 stcb->freed_from_where = from_location; 4731 } 4732 /* TEMP CODE */ 4733 4734 asoc = &stcb->asoc; 4735 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4736 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4737 /* nothing around */ 4738 so = NULL; 4739 else 4740 so = inp->sctp_socket; 4741 4742 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4743 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4744 /* 4745 * For TCP type we need special handling when we are 4746 * connected. We also include the peel'ed off ones to. 4747 */ 4748 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4749 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4750 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4751 if (so) { 4752 SOCKBUF_LOCK(&so->so_rcv); 4753 so->so_state &= ~(SS_ISCONNECTING | 4754 SS_ISDISCONNECTING | 4755 SS_ISCONFIRMING | 4756 SS_ISCONNECTED); 4757 so->so_state |= SS_ISDISCONNECTED; 4758 socantrcvmore_locked(so); 4759 socantsendmore(so); 4760 sctp_sowwakeup(inp, so); 4761 sctp_sorwakeup(inp, so); 4762 SCTP_SOWAKEUP(so); 4763 } 4764 } 4765 } 4766 4767 /* 4768 * We used timer based freeing if a reader or writer is in the way. 4769 * So we first check if we are actually being called from a timer, 4770 * if so we abort early if a reader or writer is still in the way. 4771 */ 4772 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4773 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4774 /* 4775 * is it the timer driving us? if so are the reader/writers 4776 * gone? 4777 */ 4778 if (stcb->asoc.refcnt) { 4779 /* nope, reader or writer in the way */ 4780 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4781 /* no asoc destroyed */ 4782 SCTP_TCB_UNLOCK(stcb); 4783 #ifdef SCTP_LOG_CLOSING 4784 sctp_log_closing(inp, stcb, 8); 4785 #endif 4786 return (0); 4787 } 4788 } 4789 /* Now clean up any other timers */ 4790 sctp_stop_association_timers(stcb, false); 4791 /* Now the read queue needs to be cleaned up (only once) */ 4792 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4793 SCTP_ADD_SUBSTATE(stcb, SCTP_STATE_ABOUT_TO_BE_FREED); 4794 SCTP_INP_READ_LOCK(inp); 4795 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4796 if (sq->stcb == stcb) { 4797 sq->do_not_ref_stcb = 1; 4798 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4799 /* 4800 * If there is no end, there never will be 4801 * now. 4802 */ 4803 if (sq->end_added == 0) { 4804 /* Held for PD-API clear that. */ 4805 sq->pdapi_aborted = 1; 4806 sq->held_length = 0; 4807 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4808 /* 4809 * Need to add a PD-API 4810 * aborted indication. 4811 * Setting the control_pdapi 4812 * assures that it will be 4813 * added right after this 4814 * msg. 4815 */ 4816 uint32_t strseq; 4817 4818 stcb->asoc.control_pdapi = sq; 4819 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4820 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4821 stcb, 4822 SCTP_PARTIAL_DELIVERY_ABORTED, 4823 (void *)&strseq, 4824 SCTP_SO_LOCKED); 4825 stcb->asoc.control_pdapi = NULL; 4826 } 4827 } 4828 /* Add an end to wake them */ 4829 sq->end_added = 1; 4830 } 4831 } 4832 SCTP_INP_READ_UNLOCK(inp); 4833 if (stcb->block_entry) { 4834 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4835 stcb->block_entry->error = ECONNRESET; 4836 stcb->block_entry = NULL; 4837 } 4838 } 4839 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4840 /* 4841 * Someone holds a reference OR the socket is unaccepted 4842 * yet. 4843 */ 4844 if ((stcb->asoc.refcnt) || 4845 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4846 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4847 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4848 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4849 } 4850 SCTP_TCB_UNLOCK(stcb); 4851 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4852 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4853 /* nothing around */ 4854 so = NULL; 4855 if (so) { 4856 /* Wake any reader/writers */ 4857 sctp_sorwakeup(inp, so); 4858 sctp_sowwakeup(inp, so); 4859 } 4860 4861 #ifdef SCTP_LOG_CLOSING 4862 sctp_log_closing(inp, stcb, 9); 4863 #endif 4864 /* no asoc destroyed */ 4865 return (0); 4866 } 4867 #ifdef SCTP_LOG_CLOSING 4868 sctp_log_closing(inp, stcb, 10); 4869 #endif 4870 /* 4871 * When I reach here, no others want to kill the assoc yet.. and I 4872 * own the lock. Now its possible an abort comes in when I do the 4873 * lock exchange below to grab all the locks to do the final take 4874 * out. to prevent this we increment the count, which will start a 4875 * timer and blow out above thus assuring us that we hold exclusive 4876 * killing of the asoc. Note that after getting back the TCB lock we 4877 * will go ahead and increment the counter back up and stop any 4878 * timer a passing stranger may have started :-S 4879 */ 4880 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4881 atomic_add_int(&stcb->asoc.refcnt, 1); 4882 4883 SCTP_TCB_UNLOCK(stcb); 4884 SCTP_INP_INFO_WLOCK(); 4885 SCTP_INP_WLOCK(inp); 4886 SCTP_TCB_LOCK(stcb); 4887 } 4888 /* Double check the GONE flag */ 4889 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4890 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4891 /* nothing around */ 4892 so = NULL; 4893 4894 /* 4895 * Make it invalid too, that way if its about to run it will abort 4896 * and return. 4897 */ 4898 /* re-increment the lock */ 4899 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4900 atomic_add_int(&stcb->asoc.refcnt, -1); 4901 } 4902 if (stcb->asoc.refcnt) { 4903 SCTP_CLEAR_SUBSTATE(stcb, SCTP_STATE_IN_ACCEPT_QUEUE); 4904 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4905 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4906 SCTP_INP_INFO_WUNLOCK(); 4907 SCTP_INP_WUNLOCK(inp); 4908 } 4909 SCTP_TCB_UNLOCK(stcb); 4910 return (0); 4911 } 4912 asoc->state = 0; 4913 if (inp->sctp_tcbhash) { 4914 LIST_REMOVE(stcb, sctp_tcbhash); 4915 } 4916 if (stcb->asoc.in_asocid_hash) { 4917 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4918 } 4919 /* Now lets remove it from the list of ALL associations in the EP */ 4920 LIST_REMOVE(stcb, sctp_tcblist); 4921 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4922 SCTP_INP_INCR_REF(inp); 4923 SCTP_INP_WUNLOCK(inp); 4924 } 4925 /* pull from vtag hash */ 4926 LIST_REMOVE(stcb, sctp_asocs); 4927 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4928 inp->sctp_lport, stcb->rport); 4929 4930 /* 4931 * Now restop the timers to be sure this is paranoia at is finest! 4932 */ 4933 sctp_stop_association_timers(stcb, true); 4934 4935 /* 4936 * The chunk lists and such SHOULD be empty but we check them just 4937 * in case. 4938 */ 4939 /* anything on the wheel needs to be removed */ 4940 SCTP_TCB_SEND_LOCK(stcb); 4941 for (i = 0; i < asoc->streamoutcnt; i++) { 4942 struct sctp_stream_out *outs; 4943 4944 outs = &asoc->strmout[i]; 4945 /* now clean up any chunks here */ 4946 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4947 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4948 TAILQ_REMOVE(&outs->outqueue, sp, next); 4949 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 1); 4950 sctp_free_spbufspace(stcb, asoc, sp); 4951 if (sp->data) { 4952 if (so) { 4953 /* Still an open socket - report */ 4954 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4955 0, (void *)sp, SCTP_SO_LOCKED); 4956 } 4957 if (sp->data) { 4958 sctp_m_freem(sp->data); 4959 sp->data = NULL; 4960 sp->tail_mbuf = NULL; 4961 sp->length = 0; 4962 } 4963 } 4964 if (sp->net) { 4965 sctp_free_remote_addr(sp->net); 4966 sp->net = NULL; 4967 } 4968 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4969 } 4970 } 4971 SCTP_TCB_SEND_UNLOCK(stcb); 4972 /* sa_ignore FREED_MEMORY */ 4973 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4974 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4975 SCTP_FREE(strrst, SCTP_M_STRESET); 4976 } 4977 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4978 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4979 if (sq->data) { 4980 sctp_m_freem(sq->data); 4981 sq->data = NULL; 4982 } 4983 sctp_free_remote_addr(sq->whoFrom); 4984 sq->whoFrom = NULL; 4985 sq->stcb = NULL; 4986 /* Free the ctl entry */ 4987 sctp_free_a_readq(stcb, sq); 4988 /* sa_ignore FREED_MEMORY */ 4989 } 4990 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4991 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4992 if (chk->data) { 4993 sctp_m_freem(chk->data); 4994 chk->data = NULL; 4995 } 4996 if (chk->holds_key_ref) 4997 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4998 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4999 SCTP_DECR_CHK_COUNT(); 5000 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5001 asoc->free_chunk_cnt--; 5002 /* sa_ignore FREED_MEMORY */ 5003 } 5004 /* pending send queue SHOULD be empty */ 5005 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5006 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5007 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5008 #ifdef INVARIANTS 5009 } else { 5010 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5011 #endif 5012 } 5013 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5014 if (chk->data) { 5015 if (so) { 5016 /* Still a socket? */ 5017 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5018 0, chk, SCTP_SO_LOCKED); 5019 } 5020 if (chk->data) { 5021 sctp_m_freem(chk->data); 5022 chk->data = NULL; 5023 } 5024 } 5025 if (chk->holds_key_ref) 5026 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5027 if (chk->whoTo) { 5028 sctp_free_remote_addr(chk->whoTo); 5029 chk->whoTo = NULL; 5030 } 5031 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5032 SCTP_DECR_CHK_COUNT(); 5033 /* sa_ignore FREED_MEMORY */ 5034 } 5035 /* sent queue SHOULD be empty */ 5036 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5037 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5038 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5039 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5040 #ifdef INVARIANTS 5041 } else { 5042 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5043 #endif 5044 } 5045 } 5046 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5047 if (chk->data) { 5048 if (so) { 5049 /* Still a socket? */ 5050 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5051 0, chk, SCTP_SO_LOCKED); 5052 } 5053 if (chk->data) { 5054 sctp_m_freem(chk->data); 5055 chk->data = NULL; 5056 } 5057 } 5058 if (chk->holds_key_ref) 5059 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5060 sctp_free_remote_addr(chk->whoTo); 5061 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5062 SCTP_DECR_CHK_COUNT(); 5063 /* sa_ignore FREED_MEMORY */ 5064 } 5065 #ifdef INVARIANTS 5066 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5067 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5068 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5069 } 5070 } 5071 #endif 5072 /* control queue MAY not be empty */ 5073 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5074 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5075 if (chk->data) { 5076 sctp_m_freem(chk->data); 5077 chk->data = NULL; 5078 } 5079 if (chk->holds_key_ref) 5080 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5081 sctp_free_remote_addr(chk->whoTo); 5082 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5083 SCTP_DECR_CHK_COUNT(); 5084 /* sa_ignore FREED_MEMORY */ 5085 } 5086 /* ASCONF queue MAY not be empty */ 5087 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5088 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5089 if (chk->data) { 5090 sctp_m_freem(chk->data); 5091 chk->data = NULL; 5092 } 5093 if (chk->holds_key_ref) 5094 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5095 sctp_free_remote_addr(chk->whoTo); 5096 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5097 SCTP_DECR_CHK_COUNT(); 5098 /* sa_ignore FREED_MEMORY */ 5099 } 5100 if (asoc->mapping_array) { 5101 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5102 asoc->mapping_array = NULL; 5103 } 5104 if (asoc->nr_mapping_array) { 5105 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5106 asoc->nr_mapping_array = NULL; 5107 } 5108 /* the stream outs */ 5109 if (asoc->strmout) { 5110 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5111 asoc->strmout = NULL; 5112 } 5113 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5114 if (asoc->strmin) { 5115 for (i = 0; i < asoc->streamincnt; i++) { 5116 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5117 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5118 } 5119 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5120 asoc->strmin = NULL; 5121 } 5122 asoc->streamincnt = 0; 5123 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5124 #ifdef INVARIANTS 5125 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5126 panic("no net's left alloc'ed, or list points to itself"); 5127 } 5128 #endif 5129 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5130 sctp_free_remote_addr(net); 5131 } 5132 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5133 /* sa_ignore FREED_MEMORY */ 5134 sctp_remove_laddr(laddr); 5135 } 5136 5137 /* pending asconf (address) parameters */ 5138 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5139 /* sa_ignore FREED_MEMORY */ 5140 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5141 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5142 } 5143 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5144 /* sa_ignore FREED_MEMORY */ 5145 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5146 if (aack->data != NULL) { 5147 sctp_m_freem(aack->data); 5148 } 5149 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5150 } 5151 /* clean up auth stuff */ 5152 if (asoc->local_hmacs) 5153 sctp_free_hmaclist(asoc->local_hmacs); 5154 if (asoc->peer_hmacs) 5155 sctp_free_hmaclist(asoc->peer_hmacs); 5156 5157 if (asoc->local_auth_chunks) 5158 sctp_free_chunklist(asoc->local_auth_chunks); 5159 if (asoc->peer_auth_chunks) 5160 sctp_free_chunklist(asoc->peer_auth_chunks); 5161 5162 sctp_free_authinfo(&asoc->authinfo); 5163 5164 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5165 LIST_REMOVE(shared_key, next); 5166 sctp_free_sharedkey(shared_key); 5167 /* sa_ignore FREED_MEMORY */ 5168 } 5169 5170 /* Insert new items here :> */ 5171 5172 /* Get rid of LOCK */ 5173 SCTP_TCB_UNLOCK(stcb); 5174 SCTP_TCB_LOCK_DESTROY(stcb); 5175 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5176 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5177 SCTP_INP_INFO_WUNLOCK(); 5178 SCTP_INP_RLOCK(inp); 5179 } 5180 #ifdef SCTP_TRACK_FREED_ASOCS 5181 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5182 /* now clean up the tasoc itself */ 5183 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5184 SCTP_DECR_ASOC_COUNT(); 5185 } else { 5186 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5187 } 5188 #else 5189 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5190 SCTP_DECR_ASOC_COUNT(); 5191 #endif 5192 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5193 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5194 /* 5195 * If its NOT the inp_free calling us AND sctp_close 5196 * as been called, we call back... 5197 */ 5198 SCTP_INP_RUNLOCK(inp); 5199 /* 5200 * This will start the kill timer (if we are the 5201 * last one) since we hold an increment yet. But 5202 * this is the only safe way to do this since 5203 * otherwise if the socket closes at the same time 5204 * we are here we might collide in the cleanup. 5205 */ 5206 sctp_inpcb_free(inp, 5207 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5208 SCTP_CALLED_DIRECTLY_NOCMPSET); 5209 SCTP_INP_DECR_REF(inp); 5210 goto out_of; 5211 } else { 5212 /* The socket is still open. */ 5213 SCTP_INP_DECR_REF(inp); 5214 } 5215 } 5216 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5217 SCTP_INP_RUNLOCK(inp); 5218 } 5219 out_of: 5220 /* destroyed the asoc */ 5221 #ifdef SCTP_LOG_CLOSING 5222 sctp_log_closing(inp, NULL, 11); 5223 #endif 5224 return (1); 5225 } 5226 5227 5228 5229 /* 5230 * determine if a destination is "reachable" based upon the addresses bound 5231 * to the current endpoint (e.g. only v4 or v6 currently bound) 5232 */ 5233 /* 5234 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5235 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5236 * types bound as its endpoint 5237 */ 5238 int 5239 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5240 { 5241 struct sctp_inpcb *inp; 5242 int answer; 5243 5244 /* 5245 * No locks here, the TCB, in all cases is already locked and an 5246 * assoc is up. There is either a INP lock by the caller applied (in 5247 * asconf case when deleting an address) or NOT in the HB case, 5248 * however if HB then the INP increment is up and the INP will not 5249 * be removed (on top of the fact that we have a TCB lock). So we 5250 * only want to read the sctp_flags, which is either bound-all or 5251 * not.. no protection needed since once an assoc is up you can't be 5252 * changing your binding. 5253 */ 5254 inp = stcb->sctp_ep; 5255 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5256 /* if bound all, destination is not restricted */ 5257 /* 5258 * RRS: Question during lock work: Is this correct? If you 5259 * are bound-all you still might need to obey the V4--V6 5260 * flags??? IMO this bound-all stuff needs to be removed! 5261 */ 5262 return (1); 5263 } 5264 /* NOTE: all "scope" checks are done when local addresses are added */ 5265 switch (destaddr->sa_family) { 5266 #ifdef INET6 5267 case AF_INET6: 5268 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5269 break; 5270 #endif 5271 #ifdef INET 5272 case AF_INET: 5273 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5274 break; 5275 #endif 5276 default: 5277 /* invalid family, so it's unreachable */ 5278 answer = 0; 5279 break; 5280 } 5281 return (answer); 5282 } 5283 5284 /* 5285 * update the inp_vflags on an endpoint 5286 */ 5287 static void 5288 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5289 { 5290 struct sctp_laddr *laddr; 5291 5292 /* first clear the flag */ 5293 inp->ip_inp.inp.inp_vflag = 0; 5294 /* set the flag based on addresses on the ep list */ 5295 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5296 if (laddr->ifa == NULL) { 5297 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5298 __func__); 5299 continue; 5300 } 5301 5302 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5303 continue; 5304 } 5305 switch (laddr->ifa->address.sa.sa_family) { 5306 #ifdef INET6 5307 case AF_INET6: 5308 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5309 break; 5310 #endif 5311 #ifdef INET 5312 case AF_INET: 5313 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5314 break; 5315 #endif 5316 default: 5317 break; 5318 } 5319 } 5320 } 5321 5322 /* 5323 * Add the address to the endpoint local address list There is nothing to be 5324 * done if we are bound to all addresses 5325 */ 5326 void 5327 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5328 { 5329 struct sctp_laddr *laddr; 5330 struct sctp_tcb *stcb; 5331 int fnd, error = 0; 5332 5333 fnd = 0; 5334 5335 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5336 /* You are already bound to all. You have it already */ 5337 return; 5338 } 5339 #ifdef INET6 5340 if (ifa->address.sa.sa_family == AF_INET6) { 5341 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5342 /* Can't bind a non-useable addr. */ 5343 return; 5344 } 5345 } 5346 #endif 5347 /* first, is it already present? */ 5348 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5349 if (laddr->ifa == ifa) { 5350 fnd = 1; 5351 break; 5352 } 5353 } 5354 5355 if (fnd == 0) { 5356 /* Not in the ep list */ 5357 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5358 if (error != 0) 5359 return; 5360 inp->laddr_count++; 5361 /* update inp_vflag flags */ 5362 switch (ifa->address.sa.sa_family) { 5363 #ifdef INET6 5364 case AF_INET6: 5365 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5366 break; 5367 #endif 5368 #ifdef INET 5369 case AF_INET: 5370 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5371 break; 5372 #endif 5373 default: 5374 break; 5375 } 5376 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5377 sctp_add_local_addr_restricted(stcb, ifa); 5378 } 5379 } 5380 return; 5381 } 5382 5383 5384 /* 5385 * select a new (hopefully reachable) destination net (should only be used 5386 * when we deleted an ep addr that is the only usable source address to reach 5387 * the destination net) 5388 */ 5389 static void 5390 sctp_select_primary_destination(struct sctp_tcb *stcb) 5391 { 5392 struct sctp_nets *net; 5393 5394 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5395 /* for now, we'll just pick the first reachable one we find */ 5396 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5397 continue; 5398 if (sctp_destination_is_reachable(stcb, 5399 (struct sockaddr *)&net->ro._l_addr)) { 5400 /* found a reachable destination */ 5401 stcb->asoc.primary_destination = net; 5402 } 5403 } 5404 /* I can't there from here! ...we're gonna die shortly... */ 5405 } 5406 5407 5408 /* 5409 * Delete the address from the endpoint local address list. There is nothing 5410 * to be done if we are bound to all addresses 5411 */ 5412 void 5413 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5414 { 5415 struct sctp_laddr *laddr; 5416 int fnd; 5417 5418 fnd = 0; 5419 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5420 /* You are already bound to all. You have it already */ 5421 return; 5422 } 5423 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5424 if (laddr->ifa == ifa) { 5425 fnd = 1; 5426 break; 5427 } 5428 } 5429 if (fnd && (inp->laddr_count < 2)) { 5430 /* can't delete unless there are at LEAST 2 addresses */ 5431 return; 5432 } 5433 if (fnd) { 5434 /* 5435 * clean up any use of this address go through our 5436 * associations and clear any last_used_address that match 5437 * this one for each assoc, see if a new primary_destination 5438 * is needed 5439 */ 5440 struct sctp_tcb *stcb; 5441 5442 /* clean up "next_addr_touse" */ 5443 if (inp->next_addr_touse == laddr) 5444 /* delete this address */ 5445 inp->next_addr_touse = NULL; 5446 5447 /* clean up "last_used_address" */ 5448 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5449 struct sctp_nets *net; 5450 5451 SCTP_TCB_LOCK(stcb); 5452 if (stcb->asoc.last_used_address == laddr) 5453 /* delete this address */ 5454 stcb->asoc.last_used_address = NULL; 5455 /* 5456 * Now spin through all the nets and purge any ref 5457 * to laddr 5458 */ 5459 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5460 if (net->ro._s_addr == laddr->ifa) { 5461 /* Yep, purge src address selected */ 5462 sctp_rtentry_t *rt; 5463 5464 /* delete this address if cached */ 5465 rt = net->ro.ro_rt; 5466 if (rt != NULL) { 5467 RTFREE(rt); 5468 net->ro.ro_rt = NULL; 5469 } 5470 sctp_free_ifa(net->ro._s_addr); 5471 net->ro._s_addr = NULL; 5472 net->src_addr_selected = 0; 5473 } 5474 } 5475 SCTP_TCB_UNLOCK(stcb); 5476 } /* for each tcb */ 5477 /* remove it from the ep list */ 5478 sctp_remove_laddr(laddr); 5479 inp->laddr_count--; 5480 /* update inp_vflag flags */ 5481 sctp_update_ep_vflag(inp); 5482 } 5483 return; 5484 } 5485 5486 /* 5487 * Add the address to the TCB local address restricted list. 5488 * This is a "pending" address list (eg. addresses waiting for an 5489 * ASCONF-ACK response) and cannot be used as a valid source address. 5490 */ 5491 void 5492 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5493 { 5494 struct sctp_laddr *laddr; 5495 struct sctpladdr *list; 5496 5497 /* 5498 * Assumes TCB is locked.. and possibly the INP. May need to 5499 * confirm/fix that if we need it and is not the case. 5500 */ 5501 list = &stcb->asoc.sctp_restricted_addrs; 5502 5503 #ifdef INET6 5504 if (ifa->address.sa.sa_family == AF_INET6) { 5505 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5506 /* Can't bind a non-existent addr. */ 5507 return; 5508 } 5509 } 5510 #endif 5511 /* does the address already exist? */ 5512 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5513 if (laddr->ifa == ifa) { 5514 return; 5515 } 5516 } 5517 5518 /* add to the list */ 5519 (void)sctp_insert_laddr(list, ifa, 0); 5520 return; 5521 } 5522 5523 /* 5524 * Remove a local address from the TCB local address restricted list 5525 */ 5526 void 5527 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5528 { 5529 struct sctp_inpcb *inp; 5530 struct sctp_laddr *laddr; 5531 5532 /* 5533 * This is called by asconf work. It is assumed that a) The TCB is 5534 * locked and b) The INP is locked. This is true in as much as I can 5535 * trace through the entry asconf code where I did these locks. 5536 * Again, the ASCONF code is a bit different in that it does lock 5537 * the INP during its work often times. This must be since we don't 5538 * want other proc's looking up things while what they are looking 5539 * up is changing :-D 5540 */ 5541 5542 inp = stcb->sctp_ep; 5543 /* if subset bound and don't allow ASCONF's, can't delete last */ 5544 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5545 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5546 if (stcb->sctp_ep->laddr_count < 2) { 5547 /* can't delete last address */ 5548 return; 5549 } 5550 } 5551 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5552 /* remove the address if it exists */ 5553 if (laddr->ifa == NULL) 5554 continue; 5555 if (laddr->ifa == ifa) { 5556 sctp_remove_laddr(laddr); 5557 return; 5558 } 5559 } 5560 5561 /* address not found! */ 5562 return; 5563 } 5564 5565 /* 5566 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5567 */ 5568 /* sysctl */ 5569 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5570 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5571 5572 5573 5574 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5575 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5576 int *sctp_cpuarry = NULL; 5577 void 5578 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5579 { 5580 /* Queue a packet to a processor for the specified core */ 5581 struct sctp_mcore_queue *qent; 5582 struct sctp_mcore_ctrl *wkq; 5583 int need_wake = 0; 5584 5585 if (sctp_mcore_workers == NULL) { 5586 /* Something went way bad during setup */ 5587 sctp_input_with_port(m, off, 0); 5588 return; 5589 } 5590 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5591 (sizeof(struct sctp_mcore_queue)), 5592 SCTP_M_MCORE); 5593 if (qent == NULL) { 5594 /* This is trouble */ 5595 sctp_input_with_port(m, off, 0); 5596 return; 5597 } 5598 qent->vn = curvnet; 5599 qent->m = m; 5600 qent->off = off; 5601 qent->v6 = 0; 5602 wkq = &sctp_mcore_workers[cpu_to_use]; 5603 SCTP_MCORE_QLOCK(wkq); 5604 5605 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5606 if (wkq->running == 0) { 5607 need_wake = 1; 5608 } 5609 SCTP_MCORE_QUNLOCK(wkq); 5610 if (need_wake) { 5611 wakeup(&wkq->running); 5612 } 5613 } 5614 5615 static void 5616 sctp_mcore_thread(void *arg) 5617 { 5618 5619 struct sctp_mcore_ctrl *wkq; 5620 struct sctp_mcore_queue *qent; 5621 5622 wkq = (struct sctp_mcore_ctrl *)arg; 5623 struct mbuf *m; 5624 int off, v6; 5625 5626 /* Wait for first tickle */ 5627 SCTP_MCORE_LOCK(wkq); 5628 wkq->running = 0; 5629 msleep(&wkq->running, 5630 &wkq->core_mtx, 5631 0, "wait for pkt", 0); 5632 SCTP_MCORE_UNLOCK(wkq); 5633 5634 /* Bind to our cpu */ 5635 thread_lock(curthread); 5636 sched_bind(curthread, wkq->cpuid); 5637 thread_unlock(curthread); 5638 5639 /* Now lets start working */ 5640 SCTP_MCORE_LOCK(wkq); 5641 /* Now grab lock and go */ 5642 for (;;) { 5643 SCTP_MCORE_QLOCK(wkq); 5644 skip_sleep: 5645 wkq->running = 1; 5646 qent = TAILQ_FIRST(&wkq->que); 5647 if (qent) { 5648 TAILQ_REMOVE(&wkq->que, qent, next); 5649 SCTP_MCORE_QUNLOCK(wkq); 5650 CURVNET_SET(qent->vn); 5651 m = qent->m; 5652 off = qent->off; 5653 v6 = qent->v6; 5654 SCTP_FREE(qent, SCTP_M_MCORE); 5655 if (v6 == 0) { 5656 sctp_input_with_port(m, off, 0); 5657 } else { 5658 SCTP_PRINTF("V6 not yet supported\n"); 5659 sctp_m_freem(m); 5660 } 5661 CURVNET_RESTORE(); 5662 SCTP_MCORE_QLOCK(wkq); 5663 } 5664 wkq->running = 0; 5665 if (!TAILQ_EMPTY(&wkq->que)) { 5666 goto skip_sleep; 5667 } 5668 SCTP_MCORE_QUNLOCK(wkq); 5669 msleep(&wkq->running, 5670 &wkq->core_mtx, 5671 0, "wait for pkt", 0); 5672 } 5673 } 5674 5675 static void 5676 sctp_startup_mcore_threads(void) 5677 { 5678 int i, cpu; 5679 5680 if (mp_ncpus == 1) 5681 return; 5682 5683 if (sctp_mcore_workers != NULL) { 5684 /* 5685 * Already been here in some previous vnet? 5686 */ 5687 return; 5688 } 5689 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5690 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5691 SCTP_M_MCORE); 5692 if (sctp_mcore_workers == NULL) { 5693 /* TSNH I hope */ 5694 return; 5695 } 5696 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5697 sizeof(struct sctp_mcore_ctrl))); 5698 /* Init the structures */ 5699 for (i = 0; i <= mp_maxid; i++) { 5700 TAILQ_INIT(&sctp_mcore_workers[i].que); 5701 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5702 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5703 sctp_mcore_workers[i].cpuid = i; 5704 } 5705 if (sctp_cpuarry == NULL) { 5706 SCTP_MALLOC(sctp_cpuarry, int *, 5707 (mp_ncpus * sizeof(int)), 5708 SCTP_M_MCORE); 5709 i = 0; 5710 CPU_FOREACH(cpu) { 5711 sctp_cpuarry[i] = cpu; 5712 i++; 5713 } 5714 } 5715 5716 /* Now start them all */ 5717 CPU_FOREACH(cpu) { 5718 (void)kproc_create(sctp_mcore_thread, 5719 (void *)&sctp_mcore_workers[cpu], 5720 &sctp_mcore_workers[cpu].thread_proc, 5721 RFPROC, 5722 SCTP_KTHREAD_PAGES, 5723 SCTP_MCORE_NAME); 5724 5725 } 5726 } 5727 #endif 5728 5729 void 5730 sctp_pcb_init(void) 5731 { 5732 /* 5733 * SCTP initialization for the PCB structures should be called by 5734 * the sctp_init() function. 5735 */ 5736 int i; 5737 struct timeval tv; 5738 5739 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5740 /* error I was called twice */ 5741 return; 5742 } 5743 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5744 5745 #if defined(SCTP_LOCAL_TRACE_BUF) 5746 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5747 #endif 5748 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5749 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5750 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5751 SCTP_M_MCORE); 5752 #endif 5753 (void)SCTP_GETTIME_TIMEVAL(&tv); 5754 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5755 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5756 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5757 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5758 #else 5759 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5760 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5761 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5762 #endif 5763 /* init the empty list of (All) Endpoints */ 5764 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5765 5766 5767 /* init the hash table of endpoints */ 5768 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5769 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5770 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5771 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5772 &SCTP_BASE_INFO(hashasocmark)); 5773 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5774 &SCTP_BASE_INFO(hashmark)); 5775 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5776 &SCTP_BASE_INFO(hashtcpmark)); 5777 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5778 5779 5780 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5781 &SCTP_BASE_INFO(hashvrfmark)); 5782 5783 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5784 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5785 /* init the zones */ 5786 /* 5787 * FIX ME: Should check for NULL returns, but if it does fail we are 5788 * doomed to panic anyways... add later maybe. 5789 */ 5790 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5791 sizeof(struct sctp_inpcb), maxsockets); 5792 5793 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5794 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5795 5796 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5797 sizeof(struct sctp_laddr), 5798 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5799 5800 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5801 sizeof(struct sctp_nets), 5802 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5803 5804 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5805 sizeof(struct sctp_tmit_chunk), 5806 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5807 5808 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5809 sizeof(struct sctp_queued_to_read), 5810 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5811 5812 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5813 sizeof(struct sctp_stream_queue_pending), 5814 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5815 5816 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5817 sizeof(struct sctp_asconf), 5818 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5819 5820 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5821 sizeof(struct sctp_asconf_ack), 5822 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5823 5824 5825 /* Master Lock INIT for info structure */ 5826 SCTP_INP_INFO_LOCK_INIT(); 5827 SCTP_STATLOG_INIT_LOCK(); 5828 5829 SCTP_IPI_COUNT_INIT(); 5830 SCTP_IPI_ADDR_INIT(); 5831 #ifdef SCTP_PACKET_LOGGING 5832 SCTP_IP_PKTLOG_INIT(); 5833 #endif 5834 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5835 5836 SCTP_WQ_ADDR_INIT(); 5837 /* not sure if we need all the counts */ 5838 SCTP_BASE_INFO(ipi_count_ep) = 0; 5839 /* assoc/tcb zone info */ 5840 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5841 /* local addrlist zone info */ 5842 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5843 /* remote addrlist zone info */ 5844 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5845 /* chunk info */ 5846 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5847 5848 /* socket queue zone info */ 5849 SCTP_BASE_INFO(ipi_count_readq) = 0; 5850 5851 /* stream out queue cont */ 5852 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5853 5854 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5855 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5856 5857 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5858 5859 /* Init the TIMEWAIT list */ 5860 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5861 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5862 } 5863 sctp_startup_iterator(); 5864 5865 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5866 sctp_startup_mcore_threads(); 5867 #endif 5868 5869 /* 5870 * INIT the default VRF which for BSD is the only one, other O/S's 5871 * may have more. But initially they must start with one and then 5872 * add the VRF's as addresses are added. 5873 */ 5874 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5875 } 5876 5877 /* 5878 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5879 */ 5880 void 5881 sctp_pcb_finish(void) 5882 { 5883 struct sctp_vrflist *vrf_bucket; 5884 struct sctp_vrf *vrf, *nvrf; 5885 struct sctp_ifn *ifn, *nifn; 5886 struct sctp_ifa *ifa, *nifa; 5887 struct sctpvtaghead *chain; 5888 struct sctp_tagblock *twait_block, *prev_twait_block; 5889 struct sctp_laddr *wi, *nwi; 5890 int i; 5891 struct sctp_iterator *it, *nit; 5892 5893 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5894 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5895 return; 5896 } 5897 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5898 /* 5899 * In FreeBSD the iterator thread never exits but we do clean up. 5900 * The only way FreeBSD reaches here is if we have VRF's but we 5901 * still add the ifdef to make it compile on old versions. 5902 */ 5903 retry: 5904 SCTP_IPI_ITERATOR_WQ_LOCK(); 5905 /* 5906 * sctp_iterator_worker() might be working on an it entry without 5907 * holding the lock. We won't find it on the list either and 5908 * continue and free/destroy it. While holding the lock, spin, to 5909 * avoid the race condition as sctp_iterator_worker() will have to 5910 * wait to re-aquire the lock. 5911 */ 5912 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5913 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5914 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5915 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5916 DELAY(10); 5917 goto retry; 5918 } 5919 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5920 if (it->vn != curvnet) { 5921 continue; 5922 } 5923 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5924 if (it->function_atend != NULL) { 5925 (*it->function_atend) (it->pointer, it->val); 5926 } 5927 SCTP_FREE(it, SCTP_M_ITER); 5928 } 5929 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5930 SCTP_ITERATOR_LOCK(); 5931 if ((sctp_it_ctl.cur_it) && 5932 (sctp_it_ctl.cur_it->vn == curvnet)) { 5933 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5934 } 5935 SCTP_ITERATOR_UNLOCK(); 5936 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5937 SCTP_WQ_ADDR_LOCK(); 5938 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5939 LIST_REMOVE(wi, sctp_nxt_addr); 5940 SCTP_DECR_LADDR_COUNT(); 5941 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5942 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5943 } 5944 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5945 } 5946 SCTP_WQ_ADDR_UNLOCK(); 5947 5948 /* 5949 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5950 * destroyed first). 5951 */ 5952 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5953 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5954 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5955 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5956 /* free the ifa */ 5957 LIST_REMOVE(ifa, next_bucket); 5958 LIST_REMOVE(ifa, next_ifa); 5959 SCTP_FREE(ifa, SCTP_M_IFA); 5960 } 5961 /* free the ifn */ 5962 LIST_REMOVE(ifn, next_bucket); 5963 LIST_REMOVE(ifn, next_ifn); 5964 SCTP_FREE(ifn, SCTP_M_IFN); 5965 } 5966 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5967 /* free the vrf */ 5968 LIST_REMOVE(vrf, next_vrf); 5969 SCTP_FREE(vrf, SCTP_M_VRF); 5970 } 5971 /* free the vrf hashes */ 5972 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5973 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5974 5975 /* 5976 * free the TIMEWAIT list elements malloc'd in the function 5977 * sctp_add_vtag_to_timewait()... 5978 */ 5979 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5980 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5981 if (!LIST_EMPTY(chain)) { 5982 prev_twait_block = NULL; 5983 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5984 if (prev_twait_block) { 5985 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5986 } 5987 prev_twait_block = twait_block; 5988 } 5989 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5990 } 5991 } 5992 5993 /* free the locks and mutexes */ 5994 #ifdef SCTP_PACKET_LOGGING 5995 SCTP_IP_PKTLOG_DESTROY(); 5996 #endif 5997 SCTP_IPI_ADDR_DESTROY(); 5998 SCTP_STATLOG_DESTROY(); 5999 SCTP_INP_INFO_LOCK_DESTROY(); 6000 6001 SCTP_WQ_ADDR_DESTROY(); 6002 6003 /* Get rid of other stuff too. */ 6004 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6005 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6006 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6007 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6008 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6009 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6010 6011 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6012 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6013 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6014 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6015 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6016 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6017 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6018 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6019 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6020 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6021 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6022 #endif 6023 } 6024 6025 6026 int 6027 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6028 int offset, int limit, 6029 struct sockaddr *src, struct sockaddr *dst, 6030 struct sockaddr *altsa, uint16_t port) 6031 { 6032 /* 6033 * grub through the INIT pulling addresses and loading them to the 6034 * nets structure in the asoc. The from address in the mbuf should 6035 * also be loaded (if it is not already). This routine can be called 6036 * with either INIT or INIT-ACK's as long as the m points to the IP 6037 * packet and the offset points to the beginning of the parameters. 6038 */ 6039 struct sctp_inpcb *inp; 6040 struct sctp_nets *net, *nnet, *net_tmp; 6041 struct sctp_paramhdr *phdr, param_buf; 6042 struct sctp_tcb *stcb_tmp; 6043 uint16_t ptype, plen; 6044 struct sockaddr *sa; 6045 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6046 struct sctp_auth_random *p_random = NULL; 6047 uint16_t random_len = 0; 6048 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6049 struct sctp_auth_hmac_algo *hmacs = NULL; 6050 uint16_t hmacs_len = 0; 6051 uint8_t saw_asconf = 0; 6052 uint8_t saw_asconf_ack = 0; 6053 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6054 struct sctp_auth_chunk_list *chunks = NULL; 6055 uint16_t num_chunks = 0; 6056 sctp_key_t *new_key; 6057 uint32_t keylen; 6058 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6059 uint8_t peer_supports_ecn; 6060 uint8_t peer_supports_prsctp; 6061 uint8_t peer_supports_auth; 6062 uint8_t peer_supports_asconf; 6063 uint8_t peer_supports_asconf_ack; 6064 uint8_t peer_supports_reconfig; 6065 uint8_t peer_supports_nrsack; 6066 uint8_t peer_supports_pktdrop; 6067 uint8_t peer_supports_idata; 6068 #ifdef INET 6069 struct sockaddr_in sin; 6070 #endif 6071 #ifdef INET6 6072 struct sockaddr_in6 sin6; 6073 #endif 6074 6075 /* First get the destination address setup too. */ 6076 #ifdef INET 6077 memset(&sin, 0, sizeof(sin)); 6078 sin.sin_family = AF_INET; 6079 sin.sin_len = sizeof(sin); 6080 sin.sin_port = stcb->rport; 6081 #endif 6082 #ifdef INET6 6083 memset(&sin6, 0, sizeof(sin6)); 6084 sin6.sin6_family = AF_INET6; 6085 sin6.sin6_len = sizeof(struct sockaddr_in6); 6086 sin6.sin6_port = stcb->rport; 6087 #endif 6088 if (altsa) { 6089 sa = altsa; 6090 } else { 6091 sa = src; 6092 } 6093 peer_supports_idata = 0; 6094 peer_supports_ecn = 0; 6095 peer_supports_prsctp = 0; 6096 peer_supports_auth = 0; 6097 peer_supports_asconf = 0; 6098 peer_supports_reconfig = 0; 6099 peer_supports_nrsack = 0; 6100 peer_supports_pktdrop = 0; 6101 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6102 /* mark all addresses that we have currently on the list */ 6103 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6104 } 6105 /* does the source address already exist? if so skip it */ 6106 inp = stcb->sctp_ep; 6107 atomic_add_int(&stcb->asoc.refcnt, 1); 6108 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6109 atomic_add_int(&stcb->asoc.refcnt, -1); 6110 6111 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6112 /* we must add the source address */ 6113 /* no scope set here since we have a tcb already. */ 6114 switch (sa->sa_family) { 6115 #ifdef INET 6116 case AF_INET: 6117 if (stcb->asoc.scope.ipv4_addr_legal) { 6118 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6119 return (-1); 6120 } 6121 } 6122 break; 6123 #endif 6124 #ifdef INET6 6125 case AF_INET6: 6126 if (stcb->asoc.scope.ipv6_addr_legal) { 6127 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6128 return (-2); 6129 } 6130 } 6131 break; 6132 #endif 6133 default: 6134 break; 6135 } 6136 } else { 6137 if (net_tmp != NULL && stcb_tmp == stcb) { 6138 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6139 } else if (stcb_tmp != stcb) { 6140 /* It belongs to another association? */ 6141 if (stcb_tmp) 6142 SCTP_TCB_UNLOCK(stcb_tmp); 6143 return (-3); 6144 } 6145 } 6146 if (stcb->asoc.state == 0) { 6147 /* the assoc was freed? */ 6148 return (-4); 6149 } 6150 /* now we must go through each of the params. */ 6151 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6152 while (phdr) { 6153 ptype = ntohs(phdr->param_type); 6154 plen = ntohs(phdr->param_length); 6155 /* 6156 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6157 * (uint32_t)ptype, (int)plen); 6158 */ 6159 if (offset + plen > limit) { 6160 break; 6161 } 6162 if (plen < sizeof(struct sctp_paramhdr)) { 6163 break; 6164 } 6165 #ifdef INET 6166 if (ptype == SCTP_IPV4_ADDRESS) { 6167 if (stcb->asoc.scope.ipv4_addr_legal) { 6168 struct sctp_ipv4addr_param *p4, p4_buf; 6169 6170 /* ok get the v4 address and check/add */ 6171 phdr = sctp_get_next_param(m, offset, 6172 (struct sctp_paramhdr *)&p4_buf, 6173 sizeof(p4_buf)); 6174 if (plen != sizeof(struct sctp_ipv4addr_param) || 6175 phdr == NULL) { 6176 return (-5); 6177 } 6178 p4 = (struct sctp_ipv4addr_param *)phdr; 6179 sin.sin_addr.s_addr = p4->addr; 6180 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6181 /* Skip multi-cast addresses */ 6182 goto next_param; 6183 } 6184 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6185 (sin.sin_addr.s_addr == INADDR_ANY)) { 6186 goto next_param; 6187 } 6188 sa = (struct sockaddr *)&sin; 6189 inp = stcb->sctp_ep; 6190 atomic_add_int(&stcb->asoc.refcnt, 1); 6191 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6192 dst, stcb); 6193 atomic_add_int(&stcb->asoc.refcnt, -1); 6194 6195 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6196 inp == NULL) { 6197 /* we must add the source address */ 6198 /* 6199 * no scope set since we have a tcb 6200 * already 6201 */ 6202 6203 /* 6204 * we must validate the state again 6205 * here 6206 */ 6207 add_it_now: 6208 if (stcb->asoc.state == 0) { 6209 /* the assoc was freed? */ 6210 return (-7); 6211 } 6212 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6213 return (-8); 6214 } 6215 } else if (stcb_tmp == stcb) { 6216 if (stcb->asoc.state == 0) { 6217 /* the assoc was freed? */ 6218 return (-10); 6219 } 6220 if (net != NULL) { 6221 /* clear flag */ 6222 net->dest_state &= 6223 ~SCTP_ADDR_NOT_IN_ASSOC; 6224 } 6225 } else { 6226 /* 6227 * strange, address is in another 6228 * assoc? straighten out locks. 6229 */ 6230 if (stcb_tmp) { 6231 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6232 struct mbuf *op_err; 6233 char msg[SCTP_DIAG_INFO_LEN]; 6234 6235 /* 6236 * in setup state we 6237 * abort this guy 6238 */ 6239 snprintf(msg, sizeof(msg), 6240 "%s:%d at %s", __FILE__, __LINE__, __func__); 6241 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6242 msg); 6243 sctp_abort_an_association(stcb_tmp->sctp_ep, 6244 stcb_tmp, op_err, 6245 SCTP_SO_NOT_LOCKED); 6246 goto add_it_now; 6247 } 6248 SCTP_TCB_UNLOCK(stcb_tmp); 6249 } 6250 6251 if (stcb->asoc.state == 0) { 6252 /* the assoc was freed? */ 6253 return (-12); 6254 } 6255 return (-13); 6256 } 6257 } 6258 } else 6259 #endif 6260 #ifdef INET6 6261 if (ptype == SCTP_IPV6_ADDRESS) { 6262 if (stcb->asoc.scope.ipv6_addr_legal) { 6263 /* ok get the v6 address and check/add */ 6264 struct sctp_ipv6addr_param *p6, p6_buf; 6265 6266 phdr = sctp_get_next_param(m, offset, 6267 (struct sctp_paramhdr *)&p6_buf, 6268 sizeof(p6_buf)); 6269 if (plen != sizeof(struct sctp_ipv6addr_param) || 6270 phdr == NULL) { 6271 return (-14); 6272 } 6273 p6 = (struct sctp_ipv6addr_param *)phdr; 6274 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6275 sizeof(p6->addr)); 6276 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6277 /* Skip multi-cast addresses */ 6278 goto next_param; 6279 } 6280 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6281 /* 6282 * Link local make no sense without 6283 * scope 6284 */ 6285 goto next_param; 6286 } 6287 sa = (struct sockaddr *)&sin6; 6288 inp = stcb->sctp_ep; 6289 atomic_add_int(&stcb->asoc.refcnt, 1); 6290 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6291 dst, stcb); 6292 atomic_add_int(&stcb->asoc.refcnt, -1); 6293 if (stcb_tmp == NULL && 6294 (inp == stcb->sctp_ep || inp == NULL)) { 6295 /* 6296 * we must validate the state again 6297 * here 6298 */ 6299 add_it_now6: 6300 if (stcb->asoc.state == 0) { 6301 /* the assoc was freed? */ 6302 return (-16); 6303 } 6304 /* 6305 * we must add the address, no scope 6306 * set 6307 */ 6308 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6309 return (-17); 6310 } 6311 } else if (stcb_tmp == stcb) { 6312 /* 6313 * we must validate the state again 6314 * here 6315 */ 6316 if (stcb->asoc.state == 0) { 6317 /* the assoc was freed? */ 6318 return (-19); 6319 } 6320 if (net != NULL) { 6321 /* clear flag */ 6322 net->dest_state &= 6323 ~SCTP_ADDR_NOT_IN_ASSOC; 6324 } 6325 } else { 6326 /* 6327 * strange, address is in another 6328 * assoc? straighten out locks. 6329 */ 6330 if (stcb_tmp) { 6331 if (SCTP_GET_STATE(stcb_tmp) == SCTP_STATE_COOKIE_WAIT) { 6332 struct mbuf *op_err; 6333 char msg[SCTP_DIAG_INFO_LEN]; 6334 6335 /* 6336 * in setup state we 6337 * abort this guy 6338 */ 6339 snprintf(msg, sizeof(msg), 6340 "%s:%d at %s", __FILE__, __LINE__, __func__); 6341 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6342 msg); 6343 sctp_abort_an_association(stcb_tmp->sctp_ep, 6344 stcb_tmp, op_err, 6345 SCTP_SO_NOT_LOCKED); 6346 goto add_it_now6; 6347 } 6348 SCTP_TCB_UNLOCK(stcb_tmp); 6349 } 6350 if (stcb->asoc.state == 0) { 6351 /* the assoc was freed? */ 6352 return (-21); 6353 } 6354 return (-22); 6355 } 6356 } 6357 } else 6358 #endif 6359 if (ptype == SCTP_ECN_CAPABLE) { 6360 peer_supports_ecn = 1; 6361 } else if (ptype == SCTP_ULP_ADAPTATION) { 6362 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6363 struct sctp_adaptation_layer_indication ai, 6364 *aip; 6365 6366 phdr = sctp_get_next_param(m, offset, 6367 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6368 aip = (struct sctp_adaptation_layer_indication *)phdr; 6369 if (aip) { 6370 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6371 stcb->asoc.adaptation_needed = 1; 6372 } 6373 } 6374 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6375 struct sctp_asconf_addr_param lstore, *fee; 6376 int lptype; 6377 struct sockaddr *lsa = NULL; 6378 #ifdef INET 6379 struct sctp_asconf_addrv4_param *fii; 6380 #endif 6381 6382 if (stcb->asoc.asconf_supported == 0) { 6383 return (-100); 6384 } 6385 if (plen > sizeof(lstore)) { 6386 return (-23); 6387 } 6388 if (plen < sizeof(struct sctp_asconf_addrv4_param)) { 6389 return (-101); 6390 } 6391 phdr = sctp_get_next_param(m, offset, 6392 (struct sctp_paramhdr *)&lstore, 6393 plen); 6394 if (phdr == NULL) { 6395 return (-24); 6396 } 6397 fee = (struct sctp_asconf_addr_param *)phdr; 6398 lptype = ntohs(fee->addrp.ph.param_type); 6399 switch (lptype) { 6400 #ifdef INET 6401 case SCTP_IPV4_ADDRESS: 6402 if (plen != 6403 sizeof(struct sctp_asconf_addrv4_param)) { 6404 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6405 (int)sizeof(struct sctp_asconf_addrv4_param), 6406 plen); 6407 } else { 6408 fii = (struct sctp_asconf_addrv4_param *)fee; 6409 sin.sin_addr.s_addr = fii->addrp.addr; 6410 lsa = (struct sockaddr *)&sin; 6411 } 6412 break; 6413 #endif 6414 #ifdef INET6 6415 case SCTP_IPV6_ADDRESS: 6416 if (plen != 6417 sizeof(struct sctp_asconf_addr_param)) { 6418 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6419 (int)sizeof(struct sctp_asconf_addr_param), 6420 plen); 6421 } else { 6422 memcpy(sin6.sin6_addr.s6_addr, 6423 fee->addrp.addr, 6424 sizeof(fee->addrp.addr)); 6425 lsa = (struct sockaddr *)&sin6; 6426 } 6427 break; 6428 #endif 6429 default: 6430 break; 6431 } 6432 if (lsa) { 6433 (void)sctp_set_primary_addr(stcb, sa, NULL); 6434 } 6435 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6436 stcb->asoc.peer_supports_nat = 1; 6437 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6438 /* Peer supports pr-sctp */ 6439 peer_supports_prsctp = 1; 6440 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6441 /* A supported extension chunk */ 6442 struct sctp_supported_chunk_types_param *pr_supported; 6443 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6444 int num_ent, i; 6445 6446 if (plen > sizeof(local_store)) { 6447 return (-35); 6448 } 6449 phdr = sctp_get_next_param(m, offset, 6450 (struct sctp_paramhdr *)&local_store, plen); 6451 if (phdr == NULL) { 6452 return (-25); 6453 } 6454 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6455 num_ent = plen - sizeof(struct sctp_paramhdr); 6456 for (i = 0; i < num_ent; i++) { 6457 switch (pr_supported->chunk_types[i]) { 6458 case SCTP_ASCONF: 6459 peer_supports_asconf = 1; 6460 break; 6461 case SCTP_ASCONF_ACK: 6462 peer_supports_asconf_ack = 1; 6463 break; 6464 case SCTP_FORWARD_CUM_TSN: 6465 peer_supports_prsctp = 1; 6466 break; 6467 case SCTP_PACKET_DROPPED: 6468 peer_supports_pktdrop = 1; 6469 break; 6470 case SCTP_NR_SELECTIVE_ACK: 6471 peer_supports_nrsack = 1; 6472 break; 6473 case SCTP_STREAM_RESET: 6474 peer_supports_reconfig = 1; 6475 break; 6476 case SCTP_AUTHENTICATION: 6477 peer_supports_auth = 1; 6478 break; 6479 case SCTP_IDATA: 6480 peer_supports_idata = 1; 6481 break; 6482 default: 6483 /* one I have not learned yet */ 6484 break; 6485 6486 } 6487 } 6488 } else if (ptype == SCTP_RANDOM) { 6489 if (plen > sizeof(random_store)) 6490 break; 6491 if (got_random) { 6492 /* already processed a RANDOM */ 6493 goto next_param; 6494 } 6495 phdr = sctp_get_next_param(m, offset, 6496 (struct sctp_paramhdr *)random_store, 6497 plen); 6498 if (phdr == NULL) 6499 return (-26); 6500 p_random = (struct sctp_auth_random *)phdr; 6501 random_len = plen - sizeof(*p_random); 6502 /* enforce the random length */ 6503 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6504 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6505 return (-27); 6506 } 6507 got_random = 1; 6508 } else if (ptype == SCTP_HMAC_LIST) { 6509 uint16_t num_hmacs; 6510 uint16_t i; 6511 6512 if (plen > sizeof(hmacs_store)) 6513 break; 6514 if (got_hmacs) { 6515 /* already processed a HMAC list */ 6516 goto next_param; 6517 } 6518 phdr = sctp_get_next_param(m, offset, 6519 (struct sctp_paramhdr *)hmacs_store, 6520 plen); 6521 if (phdr == NULL) 6522 return (-28); 6523 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6524 hmacs_len = plen - sizeof(*hmacs); 6525 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6526 /* validate the hmac list */ 6527 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6528 return (-29); 6529 } 6530 if (stcb->asoc.peer_hmacs != NULL) 6531 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6532 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6533 if (stcb->asoc.peer_hmacs != NULL) { 6534 for (i = 0; i < num_hmacs; i++) { 6535 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6536 ntohs(hmacs->hmac_ids[i])); 6537 } 6538 } 6539 got_hmacs = 1; 6540 } else if (ptype == SCTP_CHUNK_LIST) { 6541 int i; 6542 6543 if (plen > sizeof(chunks_store)) 6544 break; 6545 if (got_chklist) { 6546 /* already processed a Chunks list */ 6547 goto next_param; 6548 } 6549 phdr = sctp_get_next_param(m, offset, 6550 (struct sctp_paramhdr *)chunks_store, 6551 plen); 6552 if (phdr == NULL) 6553 return (-30); 6554 chunks = (struct sctp_auth_chunk_list *)phdr; 6555 num_chunks = plen - sizeof(*chunks); 6556 if (stcb->asoc.peer_auth_chunks != NULL) 6557 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6558 else 6559 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6560 for (i = 0; i < num_chunks; i++) { 6561 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6562 stcb->asoc.peer_auth_chunks); 6563 /* record asconf/asconf-ack if listed */ 6564 if (chunks->chunk_types[i] == SCTP_ASCONF) 6565 saw_asconf = 1; 6566 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6567 saw_asconf_ack = 1; 6568 6569 } 6570 got_chklist = 1; 6571 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6572 (ptype == SCTP_STATE_COOKIE) || 6573 (ptype == SCTP_UNRECOG_PARAM) || 6574 (ptype == SCTP_COOKIE_PRESERVE) || 6575 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6576 (ptype == SCTP_ADD_IP_ADDRESS) || 6577 (ptype == SCTP_DEL_IP_ADDRESS) || 6578 (ptype == SCTP_ERROR_CAUSE_IND) || 6579 (ptype == SCTP_SUCCESS_REPORT)) { 6580 /* don't care */ ; 6581 } else { 6582 if ((ptype & 0x8000) == 0x0000) { 6583 /* 6584 * must stop processing the rest of the 6585 * param's. Any report bits were handled 6586 * with the call to 6587 * sctp_arethere_unrecognized_parameters() 6588 * when the INIT or INIT-ACK was first seen. 6589 */ 6590 break; 6591 } 6592 } 6593 6594 next_param: 6595 offset += SCTP_SIZE32(plen); 6596 if (offset >= limit) { 6597 break; 6598 } 6599 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6600 sizeof(param_buf)); 6601 } 6602 /* Now check to see if we need to purge any addresses */ 6603 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6604 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6605 SCTP_ADDR_NOT_IN_ASSOC) { 6606 /* This address has been removed from the asoc */ 6607 /* remove and free it */ 6608 stcb->asoc.numnets--; 6609 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6610 sctp_free_remote_addr(net); 6611 if (net == stcb->asoc.primary_destination) { 6612 stcb->asoc.primary_destination = NULL; 6613 sctp_select_primary_destination(stcb); 6614 } 6615 } 6616 } 6617 if ((stcb->asoc.ecn_supported == 1) && 6618 (peer_supports_ecn == 0)) { 6619 stcb->asoc.ecn_supported = 0; 6620 } 6621 if ((stcb->asoc.prsctp_supported == 1) && 6622 (peer_supports_prsctp == 0)) { 6623 stcb->asoc.prsctp_supported = 0; 6624 } 6625 if ((stcb->asoc.auth_supported == 1) && 6626 ((peer_supports_auth == 0) || 6627 (got_random == 0) || (got_hmacs == 0))) { 6628 stcb->asoc.auth_supported = 0; 6629 } 6630 if ((stcb->asoc.asconf_supported == 1) && 6631 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6632 (stcb->asoc.auth_supported == 0) || 6633 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6634 stcb->asoc.asconf_supported = 0; 6635 } 6636 if ((stcb->asoc.reconfig_supported == 1) && 6637 (peer_supports_reconfig == 0)) { 6638 stcb->asoc.reconfig_supported = 0; 6639 } 6640 if ((stcb->asoc.idata_supported == 1) && 6641 (peer_supports_idata == 0)) { 6642 stcb->asoc.idata_supported = 0; 6643 } 6644 if ((stcb->asoc.nrsack_supported == 1) && 6645 (peer_supports_nrsack == 0)) { 6646 stcb->asoc.nrsack_supported = 0; 6647 } 6648 if ((stcb->asoc.pktdrop_supported == 1) && 6649 (peer_supports_pktdrop == 0)) { 6650 stcb->asoc.pktdrop_supported = 0; 6651 } 6652 /* validate authentication required parameters */ 6653 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6654 /* peer does not support auth but sent a chunks list? */ 6655 return (-31); 6656 } 6657 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6658 /* peer supports asconf but not auth? */ 6659 return (-32); 6660 } else if ((peer_supports_asconf == 1) && 6661 (peer_supports_auth == 1) && 6662 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6663 return (-33); 6664 } 6665 /* concatenate the full random key */ 6666 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6667 if (chunks != NULL) { 6668 keylen += sizeof(*chunks) + num_chunks; 6669 } 6670 new_key = sctp_alloc_key(keylen); 6671 if (new_key != NULL) { 6672 /* copy in the RANDOM */ 6673 if (p_random != NULL) { 6674 keylen = sizeof(*p_random) + random_len; 6675 memcpy(new_key->key, p_random, keylen); 6676 } else { 6677 keylen = 0; 6678 } 6679 /* append in the AUTH chunks */ 6680 if (chunks != NULL) { 6681 memcpy(new_key->key + keylen, chunks, 6682 sizeof(*chunks) + num_chunks); 6683 keylen += sizeof(*chunks) + num_chunks; 6684 } 6685 /* append in the HMACs */ 6686 if (hmacs != NULL) { 6687 memcpy(new_key->key + keylen, hmacs, 6688 sizeof(*hmacs) + hmacs_len); 6689 } 6690 } else { 6691 /* failed to get memory for the key */ 6692 return (-34); 6693 } 6694 if (stcb->asoc.authinfo.peer_random != NULL) 6695 sctp_free_key(stcb->asoc.authinfo.peer_random); 6696 stcb->asoc.authinfo.peer_random = new_key; 6697 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6698 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6699 6700 return (0); 6701 } 6702 6703 int 6704 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6705 struct sctp_nets *net) 6706 { 6707 /* make sure the requested primary address exists in the assoc */ 6708 if (net == NULL && sa) 6709 net = sctp_findnet(stcb, sa); 6710 6711 if (net == NULL) { 6712 /* didn't find the requested primary address! */ 6713 return (-1); 6714 } else { 6715 /* set the primary address */ 6716 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6717 /* Must be confirmed, so queue to set */ 6718 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6719 return (0); 6720 } 6721 stcb->asoc.primary_destination = net; 6722 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6723 sctp_free_remote_addr(stcb->asoc.alternate); 6724 stcb->asoc.alternate = NULL; 6725 } 6726 net = TAILQ_FIRST(&stcb->asoc.nets); 6727 if (net != stcb->asoc.primary_destination) { 6728 /* 6729 * first one on the list is NOT the primary 6730 * sctp_cmpaddr() is much more efficient if the 6731 * primary is the first on the list, make it so. 6732 */ 6733 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6734 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6735 } 6736 return (0); 6737 } 6738 } 6739 6740 int 6741 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6742 { 6743 /* 6744 * This function serves two purposes. It will see if a TAG can be 6745 * re-used and return 1 for yes it is ok and 0 for don't use that 6746 * tag. A secondary function it will do is purge out old tags that 6747 * can be removed. 6748 */ 6749 struct sctpvtaghead *chain; 6750 struct sctp_tagblock *twait_block; 6751 struct sctpasochead *head; 6752 struct sctp_tcb *stcb; 6753 int i; 6754 6755 SCTP_INP_INFO_RLOCK(); 6756 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6757 SCTP_BASE_INFO(hashasocmark))]; 6758 LIST_FOREACH(stcb, head, sctp_asocs) { 6759 /* 6760 * We choose not to lock anything here. TCB's can't be 6761 * removed since we have the read lock, so they can't be 6762 * freed on us, same thing for the INP. I may be wrong with 6763 * this assumption, but we will go with it for now :-) 6764 */ 6765 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6766 continue; 6767 } 6768 if (stcb->asoc.my_vtag == tag) { 6769 /* candidate */ 6770 if (stcb->rport != rport) { 6771 continue; 6772 } 6773 if (stcb->sctp_ep->sctp_lport != lport) { 6774 continue; 6775 } 6776 /* Its a used tag set */ 6777 SCTP_INP_INFO_RUNLOCK(); 6778 return (0); 6779 } 6780 } 6781 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6782 /* Now what about timed wait ? */ 6783 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6784 /* 6785 * Block(s) are present, lets see if we have this tag in the 6786 * list 6787 */ 6788 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6789 if (twait_block->vtag_block[i].v_tag == 0) { 6790 /* not used */ 6791 continue; 6792 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6793 now->tv_sec) { 6794 /* Audit expires this guy */ 6795 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6796 twait_block->vtag_block[i].v_tag = 0; 6797 twait_block->vtag_block[i].lport = 0; 6798 twait_block->vtag_block[i].rport = 0; 6799 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6800 (twait_block->vtag_block[i].lport == lport) && 6801 (twait_block->vtag_block[i].rport == rport)) { 6802 /* Bad tag, sorry :< */ 6803 SCTP_INP_INFO_RUNLOCK(); 6804 return (0); 6805 } 6806 } 6807 } 6808 SCTP_INP_INFO_RUNLOCK(); 6809 return (1); 6810 } 6811 6812 static void 6813 sctp_drain_mbufs(struct sctp_tcb *stcb) 6814 { 6815 /* 6816 * We must hunt this association for MBUF's past the cumack (i.e. 6817 * out of order data that we can renege on). 6818 */ 6819 struct sctp_association *asoc; 6820 struct sctp_tmit_chunk *chk, *nchk; 6821 uint32_t cumulative_tsn_p1; 6822 struct sctp_queued_to_read *control, *ncontrol; 6823 int cnt, strmat; 6824 uint32_t gap, i; 6825 int fnd = 0; 6826 6827 /* We look for anything larger than the cum-ack + 1 */ 6828 6829 asoc = &stcb->asoc; 6830 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6831 /* none we can reneg on. */ 6832 return; 6833 } 6834 SCTP_STAT_INCR(sctps_protocol_drains_done); 6835 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6836 cnt = 0; 6837 /* Ok that was fun, now we will drain all the inbound streams? */ 6838 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6839 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6840 #ifdef INVARIANTS 6841 if (control->on_strm_q != SCTP_ON_ORDERED) { 6842 panic("Huh control: %p on_q: %d -- not ordered?", 6843 control, control->on_strm_q); 6844 } 6845 #endif 6846 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6847 /* Yep it is above cum-ack */ 6848 cnt++; 6849 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6850 KASSERT(control->length > 0, ("control has zero length")); 6851 if (asoc->size_on_all_streams >= control->length) { 6852 asoc->size_on_all_streams -= control->length; 6853 } else { 6854 #ifdef INVARIANTS 6855 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6856 #else 6857 asoc->size_on_all_streams = 0; 6858 #endif 6859 } 6860 sctp_ucount_decr(asoc->cnt_on_all_streams); 6861 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6862 if (control->on_read_q) { 6863 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6864 control->on_read_q = 0; 6865 } 6866 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6867 control->on_strm_q = 0; 6868 if (control->data) { 6869 sctp_m_freem(control->data); 6870 control->data = NULL; 6871 } 6872 sctp_free_remote_addr(control->whoFrom); 6873 /* Now its reasm? */ 6874 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6875 cnt++; 6876 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6877 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6878 if (asoc->size_on_reasm_queue >= chk->send_size) { 6879 asoc->size_on_reasm_queue -= chk->send_size; 6880 } else { 6881 #ifdef INVARIANTS 6882 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6883 #else 6884 asoc->size_on_reasm_queue = 0; 6885 #endif 6886 } 6887 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6888 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6889 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6890 if (chk->data) { 6891 sctp_m_freem(chk->data); 6892 chk->data = NULL; 6893 } 6894 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6895 } 6896 sctp_free_a_readq(stcb, control); 6897 } 6898 } 6899 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6900 #ifdef INVARIANTS 6901 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6902 panic("Huh control: %p on_q: %d -- not unordered?", 6903 control, control->on_strm_q); 6904 } 6905 #endif 6906 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6907 /* Yep it is above cum-ack */ 6908 cnt++; 6909 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6910 KASSERT(control->length > 0, ("control has zero length")); 6911 if (asoc->size_on_all_streams >= control->length) { 6912 asoc->size_on_all_streams -= control->length; 6913 } else { 6914 #ifdef INVARIANTS 6915 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6916 #else 6917 asoc->size_on_all_streams = 0; 6918 #endif 6919 } 6920 sctp_ucount_decr(asoc->cnt_on_all_streams); 6921 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6922 if (control->on_read_q) { 6923 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6924 control->on_read_q = 0; 6925 } 6926 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6927 control->on_strm_q = 0; 6928 if (control->data) { 6929 sctp_m_freem(control->data); 6930 control->data = NULL; 6931 } 6932 sctp_free_remote_addr(control->whoFrom); 6933 /* Now its reasm? */ 6934 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6935 cnt++; 6936 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6937 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6938 if (asoc->size_on_reasm_queue >= chk->send_size) { 6939 asoc->size_on_reasm_queue -= chk->send_size; 6940 } else { 6941 #ifdef INVARIANTS 6942 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6943 #else 6944 asoc->size_on_reasm_queue = 0; 6945 #endif 6946 } 6947 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6948 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6949 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6950 if (chk->data) { 6951 sctp_m_freem(chk->data); 6952 chk->data = NULL; 6953 } 6954 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6955 } 6956 sctp_free_a_readq(stcb, control); 6957 } 6958 } 6959 } 6960 if (cnt) { 6961 /* We must back down to see what the new highest is */ 6962 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6963 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6964 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6965 asoc->highest_tsn_inside_map = i; 6966 fnd = 1; 6967 break; 6968 } 6969 } 6970 if (!fnd) { 6971 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6972 } 6973 6974 /* 6975 * Question, should we go through the delivery queue? The 6976 * only reason things are on here is the app not reading OR 6977 * a p-d-api up. An attacker COULD send enough in to 6978 * initiate the PD-API and then send a bunch of stuff to 6979 * other streams... these would wind up on the delivery 6980 * queue.. and then we would not get to them. But in order 6981 * to do this I then have to back-track and un-deliver 6982 * sequence numbers in streams.. el-yucko. I think for now 6983 * we will NOT look at the delivery queue and leave it to be 6984 * something to consider later. An alternative would be to 6985 * abort the P-D-API with a notification and then deliver 6986 * the data.... Or another method might be to keep track of 6987 * how many times the situation occurs and if we see a 6988 * possible attack underway just abort the association. 6989 */ 6990 #ifdef SCTP_DEBUG 6991 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6992 #endif 6993 /* 6994 * Now do we need to find a new 6995 * asoc->highest_tsn_inside_map? 6996 */ 6997 asoc->last_revoke_count = cnt; 6998 sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, 6999 SCTP_FROM_SCTP_PCB + SCTP_LOC_11); 7000 /* sa_ignore NO_NULL_CHK */ 7001 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 7002 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 7003 } 7004 /* 7005 * Another issue, in un-setting the TSN's in the mapping array we 7006 * DID NOT adjust the highest_tsn marker. This will cause one of 7007 * two things to occur. It may cause us to do extra work in checking 7008 * for our mapping array movement. More importantly it may cause us 7009 * to SACK every datagram. This may not be a bad thing though since 7010 * we will recover once we get our cum-ack above and all this stuff 7011 * we dumped recovered. 7012 */ 7013 } 7014 7015 void 7016 sctp_drain() 7017 { 7018 /* 7019 * We must walk the PCB lists for ALL associations here. The system 7020 * is LOW on MBUF's and needs help. This is where reneging will 7021 * occur. We really hope this does NOT happen! 7022 */ 7023 VNET_ITERATOR_DECL(vnet_iter); 7024 VNET_LIST_RLOCK_NOSLEEP(); 7025 VNET_FOREACH(vnet_iter) { 7026 CURVNET_SET(vnet_iter); 7027 struct sctp_inpcb *inp; 7028 struct sctp_tcb *stcb; 7029 7030 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7031 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7032 #ifdef VIMAGE 7033 continue; 7034 #else 7035 return; 7036 #endif 7037 } 7038 SCTP_INP_INFO_RLOCK(); 7039 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7040 /* For each endpoint */ 7041 SCTP_INP_RLOCK(inp); 7042 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7043 /* For each association */ 7044 SCTP_TCB_LOCK(stcb); 7045 sctp_drain_mbufs(stcb); 7046 SCTP_TCB_UNLOCK(stcb); 7047 } 7048 SCTP_INP_RUNLOCK(inp); 7049 } 7050 SCTP_INP_INFO_RUNLOCK(); 7051 CURVNET_RESTORE(); 7052 } 7053 VNET_LIST_RUNLOCK_NOSLEEP(); 7054 } 7055 7056 /* 7057 * start a new iterator 7058 * iterates through all endpoints and associations based on the pcb_state 7059 * flags and asoc_state. "af" (mandatory) is executed for all matching 7060 * assocs and "ef" (optional) is executed when the iterator completes. 7061 * "inpf" (optional) is executed for each new endpoint as it is being 7062 * iterated through. inpe (optional) is called when the inp completes 7063 * its way through all the stcbs. 7064 */ 7065 int 7066 sctp_initiate_iterator(inp_func inpf, 7067 asoc_func af, 7068 inp_func inpe, 7069 uint32_t pcb_state, 7070 uint32_t pcb_features, 7071 uint32_t asoc_state, 7072 void *argp, 7073 uint32_t argi, 7074 end_func ef, 7075 struct sctp_inpcb *s_inp, 7076 uint8_t chunk_output_off) 7077 { 7078 struct sctp_iterator *it = NULL; 7079 7080 if (af == NULL) { 7081 return (-1); 7082 } 7083 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7084 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7085 SCTP_BASE_VAR(sctp_pcb_initialized)); 7086 return (-1); 7087 } 7088 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7089 SCTP_M_ITER); 7090 if (it == NULL) { 7091 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7092 return (-1); 7093 } 7094 memset(it, 0, sizeof(*it)); 7095 it->function_assoc = af; 7096 it->function_inp = inpf; 7097 if (inpf) 7098 it->done_current_ep = 0; 7099 else 7100 it->done_current_ep = 1; 7101 it->function_atend = ef; 7102 it->pointer = argp; 7103 it->val = argi; 7104 it->pcb_flags = pcb_state; 7105 it->pcb_features = pcb_features; 7106 it->asoc_state = asoc_state; 7107 it->function_inp_end = inpe; 7108 it->no_chunk_output = chunk_output_off; 7109 it->vn = curvnet; 7110 if (s_inp) { 7111 /* Assume lock is held here */ 7112 it->inp = s_inp; 7113 SCTP_INP_INCR_REF(it->inp); 7114 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7115 } else { 7116 SCTP_INP_INFO_RLOCK(); 7117 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7118 if (it->inp) { 7119 SCTP_INP_INCR_REF(it->inp); 7120 } 7121 SCTP_INP_INFO_RUNLOCK(); 7122 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7123 7124 } 7125 SCTP_IPI_ITERATOR_WQ_LOCK(); 7126 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7127 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7128 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7129 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7130 SCTP_FREE(it, SCTP_M_ITER); 7131 return (-1); 7132 } 7133 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7134 if (sctp_it_ctl.iterator_running == 0) { 7135 sctp_wakeup_iterator(); 7136 } 7137 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7138 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7139 return (0); 7140 } 7141