1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_header.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_timer.h> 47 #include <netinet/sctp_bsd_addr.h> 48 #include <netinet/sctp_dtrace_define.h> 49 #if defined(INET) || defined(INET6) 50 #include <netinet/udp.h> 51 #endif 52 #ifdef INET6 53 #include <netinet6/ip6_var.h> 54 #endif 55 #include <sys/sched.h> 56 #include <sys/smp.h> 57 #include <sys/unistd.h> 58 59 60 VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62 /* FIX: we don't handle multiple link local scopes */ 63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64 #ifdef INET6 65 int 66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67 { 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return (0); 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return (0); 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79 } 80 #endif 81 82 void 83 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 84 { 85 /* 86 * We really don't need to lock this, but I will just because it 87 * does not hurt. 88 */ 89 SCTP_INP_INFO_RLOCK(); 90 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 91 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 92 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 93 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 94 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 95 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 96 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 97 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 98 SCTP_INP_INFO_RUNLOCK(); 99 } 100 101 /*- 102 * Addresses are added to VRF's (Virtual Router's). For BSD we 103 * have only the default VRF 0. We maintain a hash list of 104 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 105 * these has a list of addresses. When we add a new address 106 * to a VRF we lookup the ifn/ifn_index, if the ifn does 107 * not exist we create it and add it to the list of IFN's 108 * within the VRF. Once we have the sctp_ifn, we add the 109 * address to the list. So we look something like: 110 * 111 * hash-vrf-table 112 * vrf-> ifn-> ifn -> ifn 113 * vrf | 114 * ... +--ifa-> ifa -> ifa 115 * vrf 116 * 117 * We keep these separate lists since the SCTP subsystem will 118 * point to these from its source address selection nets structure. 119 * When an address is deleted it does not happen right away on 120 * the SCTP side, it gets scheduled. What we do when a 121 * delete happens is immediately remove the address from 122 * the master list and decrement the refcount. As our 123 * addip iterator works through and frees the src address 124 * selection pointing to the sctp_ifa, eventually the refcount 125 * will reach 0 and we will delete it. Note that it is assumed 126 * that any locking on system level ifn/ifa is done at the 127 * caller of these functions and these routines will only 128 * lock the SCTP structures as they add or delete things. 129 * 130 * Other notes on VRF concepts. 131 * - An endpoint can be in multiple VRF's 132 * - An association lives within a VRF and only one VRF. 133 * - Any incoming packet we can deduce the VRF for by 134 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 135 * - Any downward send call or connect call must supply the 136 * VRF via ancillary data or via some sort of set default 137 * VRF socket option call (again for BSD no brainer since 138 * the VRF is always 0). 139 * - An endpoint may add multiple VRF's to it. 140 * - Listening sockets can accept associations in any 141 * of the VRF's they are in but the assoc will end up 142 * in only one VRF (gotten from the packet or connect/send). 143 * 144 */ 145 146 struct sctp_vrf * 147 sctp_allocate_vrf(int vrf_id) 148 { 149 struct sctp_vrf *vrf = NULL; 150 struct sctp_vrflist *bucket; 151 152 /* First allocate the VRF structure */ 153 vrf = sctp_find_vrf(vrf_id); 154 if (vrf) { 155 /* Already allocated */ 156 return (vrf); 157 } 158 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 159 SCTP_M_VRF); 160 if (vrf == NULL) { 161 /* No memory */ 162 #ifdef INVARIANTS 163 panic("No memory for VRF:%d", vrf_id); 164 #endif 165 return (NULL); 166 } 167 /* setup the VRF */ 168 memset(vrf, 0, sizeof(struct sctp_vrf)); 169 vrf->vrf_id = vrf_id; 170 LIST_INIT(&vrf->ifnlist); 171 vrf->total_ifa_count = 0; 172 vrf->refcount = 0; 173 /* now also setup table ids */ 174 SCTP_INIT_VRF_TABLEID(vrf); 175 /* Init the HASH of addresses */ 176 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 177 &vrf->vrf_addr_hashmark); 178 if (vrf->vrf_addr_hash == NULL) { 179 /* No memory */ 180 #ifdef INVARIANTS 181 panic("No memory for VRF:%d", vrf_id); 182 #endif 183 SCTP_FREE(vrf, SCTP_M_VRF); 184 return (NULL); 185 } 186 /* Add it to the hash table */ 187 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 188 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 189 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 190 return (vrf); 191 } 192 193 194 struct sctp_ifn * 195 sctp_find_ifn(void *ifn, uint32_t ifn_index) 196 { 197 struct sctp_ifn *sctp_ifnp; 198 struct sctp_ifnlist *hash_ifn_head; 199 200 /* 201 * We assume the lock is held for the addresses if that's wrong 202 * problems could occur :-) 203 */ 204 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 205 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 206 if (sctp_ifnp->ifn_index == ifn_index) { 207 return (sctp_ifnp); 208 } 209 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 210 return (sctp_ifnp); 211 } 212 } 213 return (NULL); 214 } 215 216 217 struct sctp_vrf * 218 sctp_find_vrf(uint32_t vrf_id) 219 { 220 struct sctp_vrflist *bucket; 221 struct sctp_vrf *liste; 222 223 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 224 LIST_FOREACH(liste, bucket, next_vrf) { 225 if (vrf_id == liste->vrf_id) { 226 return (liste); 227 } 228 } 229 return (NULL); 230 } 231 232 233 void 234 sctp_free_vrf(struct sctp_vrf *vrf) 235 { 236 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 237 if (vrf->vrf_addr_hash) { 238 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 239 vrf->vrf_addr_hash = NULL; 240 } 241 /* We zero'd the count */ 242 LIST_REMOVE(vrf, next_vrf); 243 SCTP_FREE(vrf, SCTP_M_VRF); 244 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 245 } 246 } 247 248 249 void 250 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 251 { 252 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 253 /* We zero'd the count */ 254 if (sctp_ifnp->vrf) { 255 sctp_free_vrf(sctp_ifnp->vrf); 256 } 257 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 258 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 259 } 260 } 261 262 263 void 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 265 { 266 struct sctp_ifn *sctp_ifnp; 267 268 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 269 if (sctp_ifnp != NULL) { 270 sctp_ifnp->ifn_mtu = mtu; 271 } 272 } 273 274 275 void 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 277 { 278 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 279 /* We zero'd the count */ 280 if (sctp_ifap->ifn_p) { 281 sctp_free_ifn(sctp_ifap->ifn_p); 282 } 283 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 284 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 285 } 286 } 287 288 289 static void 290 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 291 { 292 struct sctp_ifn *found; 293 294 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 295 if (found == NULL) { 296 /* Not in the list.. sorry */ 297 return; 298 } 299 if (hold_addr_lock == 0) 300 SCTP_IPI_ADDR_WLOCK(); 301 LIST_REMOVE(sctp_ifnp, next_bucket); 302 LIST_REMOVE(sctp_ifnp, next_ifn); 303 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 304 sctp_ifnp->registered_af); 305 if (hold_addr_lock == 0) 306 SCTP_IPI_ADDR_WUNLOCK(); 307 /* Take away the reference, and possibly free it */ 308 sctp_free_ifn(sctp_ifnp); 309 } 310 311 312 void 313 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 314 const char *if_name, uint32_t ifn_index) 315 { 316 struct sctp_vrf *vrf; 317 struct sctp_ifa *sctp_ifap; 318 319 SCTP_IPI_ADDR_RLOCK(); 320 vrf = sctp_find_vrf(vrf_id); 321 if (vrf == NULL) { 322 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 323 goto out; 324 325 } 326 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 327 if (sctp_ifap == NULL) { 328 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 329 goto out; 330 } 331 if (sctp_ifap->ifn_p == NULL) { 332 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 333 goto out; 334 } 335 if (if_name) { 336 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 337 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 338 sctp_ifap->ifn_p->ifn_name, if_name); 339 goto out; 340 } 341 } else { 342 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 343 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 344 sctp_ifap->ifn_p->ifn_index, ifn_index); 345 goto out; 346 } 347 } 348 349 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 350 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 351 out: 352 SCTP_IPI_ADDR_RUNLOCK(); 353 } 354 355 356 void 357 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 358 const char *if_name, uint32_t ifn_index) 359 { 360 struct sctp_vrf *vrf; 361 struct sctp_ifa *sctp_ifap; 362 363 SCTP_IPI_ADDR_RLOCK(); 364 vrf = sctp_find_vrf(vrf_id); 365 if (vrf == NULL) { 366 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 367 goto out; 368 369 } 370 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 371 if (sctp_ifap == NULL) { 372 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 373 goto out; 374 } 375 if (sctp_ifap->ifn_p == NULL) { 376 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unusable\n"); 377 goto out; 378 } 379 if (if_name) { 380 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 381 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 382 sctp_ifap->ifn_p->ifn_name, if_name); 383 goto out; 384 } 385 } else { 386 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 387 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 388 sctp_ifap->ifn_p->ifn_index, ifn_index); 389 goto out; 390 } 391 } 392 393 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 394 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 395 out: 396 SCTP_IPI_ADDR_RUNLOCK(); 397 } 398 399 400 /*- 401 * Add an ifa to an ifn. 402 * Register the interface as necessary. 403 * NOTE: ADDR write lock MUST be held. 404 */ 405 static void 406 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 407 { 408 int ifa_af; 409 410 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 411 sctp_ifap->ifn_p = sctp_ifnp; 412 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 413 /* update address counts */ 414 sctp_ifnp->ifa_count++; 415 ifa_af = sctp_ifap->address.sa.sa_family; 416 switch (ifa_af) { 417 #ifdef INET 418 case AF_INET: 419 sctp_ifnp->num_v4++; 420 break; 421 #endif 422 #ifdef INET6 423 case AF_INET6: 424 sctp_ifnp->num_v6++; 425 break; 426 #endif 427 default: 428 break; 429 } 430 if (sctp_ifnp->ifa_count == 1) { 431 /* register the new interface */ 432 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 433 sctp_ifnp->registered_af = ifa_af; 434 } 435 } 436 437 438 /*- 439 * Remove an ifa from its ifn. 440 * If no more addresses exist, remove the ifn too. Otherwise, re-register 441 * the interface based on the remaining address families left. 442 * NOTE: ADDR write lock MUST be held. 443 */ 444 static void 445 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 446 { 447 LIST_REMOVE(sctp_ifap, next_ifa); 448 if (sctp_ifap->ifn_p) { 449 /* update address counts */ 450 sctp_ifap->ifn_p->ifa_count--; 451 switch (sctp_ifap->address.sa.sa_family) { 452 #ifdef INET 453 case AF_INET: 454 sctp_ifap->ifn_p->num_v4--; 455 break; 456 #endif 457 #ifdef INET6 458 case AF_INET6: 459 sctp_ifap->ifn_p->num_v6--; 460 break; 461 #endif 462 default: 463 break; 464 } 465 466 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 467 /* remove the ifn, possibly freeing it */ 468 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 469 } else { 470 /* re-register address family type, if needed */ 471 if ((sctp_ifap->ifn_p->num_v6 == 0) && 472 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 473 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 474 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 475 sctp_ifap->ifn_p->registered_af = AF_INET; 476 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 477 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 478 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 479 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 480 sctp_ifap->ifn_p->registered_af = AF_INET6; 481 } 482 /* free the ifn refcount */ 483 sctp_free_ifn(sctp_ifap->ifn_p); 484 } 485 sctp_ifap->ifn_p = NULL; 486 } 487 } 488 489 490 struct sctp_ifa * 491 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 492 uint32_t ifn_type, const char *if_name, void *ifa, 493 struct sockaddr *addr, uint32_t ifa_flags, 494 int dynamic_add) 495 { 496 struct sctp_vrf *vrf; 497 struct sctp_ifn *sctp_ifnp = NULL; 498 struct sctp_ifa *sctp_ifap = NULL; 499 struct sctp_ifalist *hash_addr_head; 500 struct sctp_ifnlist *hash_ifn_head; 501 uint32_t hash_of_addr; 502 int new_ifn_af = 0; 503 504 #ifdef SCTP_DEBUG 505 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 506 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 507 #endif 508 SCTP_IPI_ADDR_WLOCK(); 509 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 510 if (sctp_ifnp) { 511 vrf = sctp_ifnp->vrf; 512 } else { 513 vrf = sctp_find_vrf(vrf_id); 514 if (vrf == NULL) { 515 vrf = sctp_allocate_vrf(vrf_id); 516 if (vrf == NULL) { 517 SCTP_IPI_ADDR_WUNLOCK(); 518 return (NULL); 519 } 520 } 521 } 522 if (sctp_ifnp == NULL) { 523 /* 524 * build one and add it, can't hold lock until after malloc 525 * done though. 526 */ 527 SCTP_IPI_ADDR_WUNLOCK(); 528 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 529 sizeof(struct sctp_ifn), SCTP_M_IFN); 530 if (sctp_ifnp == NULL) { 531 #ifdef INVARIANTS 532 panic("No memory for IFN"); 533 #endif 534 return (NULL); 535 } 536 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 537 sctp_ifnp->ifn_index = ifn_index; 538 sctp_ifnp->ifn_p = ifn; 539 sctp_ifnp->ifn_type = ifn_type; 540 sctp_ifnp->refcount = 0; 541 sctp_ifnp->vrf = vrf; 542 atomic_add_int(&vrf->refcount, 1); 543 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 544 if (if_name != NULL) { 545 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 546 } else { 547 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 548 } 549 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 550 LIST_INIT(&sctp_ifnp->ifalist); 551 SCTP_IPI_ADDR_WLOCK(); 552 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 553 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 554 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 555 new_ifn_af = 1; 556 } 557 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 558 if (sctp_ifap) { 559 /* Hmm, it already exists? */ 560 if ((sctp_ifap->ifn_p) && 561 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 562 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 563 sctp_ifap->ifn_p->ifn_name, ifn_index, 564 (void *)sctp_ifap); 565 if (new_ifn_af) { 566 /* Remove the created one that we don't want */ 567 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 568 } 569 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 570 /* easy to solve, just switch back to active */ 571 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 572 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 573 sctp_ifap->ifn_p = sctp_ifnp; 574 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 575 } 576 exit_stage_left: 577 SCTP_IPI_ADDR_WUNLOCK(); 578 return (sctp_ifap); 579 } else { 580 if (sctp_ifap->ifn_p) { 581 /* 582 * The last IFN gets the address, remove the 583 * old one 584 */ 585 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 586 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 587 sctp_ifap->ifn_p->ifn_index, if_name, 588 ifn_index); 589 /* remove the address from the old ifn */ 590 sctp_remove_ifa_from_ifn(sctp_ifap); 591 /* move the address over to the new ifn */ 592 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 593 goto exit_stage_left; 594 } else { 595 /* repair ifnp which was NULL ? */ 596 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 597 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 598 (void *)sctp_ifnp, (void *)sctp_ifap); 599 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 600 } 601 goto exit_stage_left; 602 } 603 } 604 SCTP_IPI_ADDR_WUNLOCK(); 605 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 606 if (sctp_ifap == NULL) { 607 #ifdef INVARIANTS 608 panic("No memory for IFA"); 609 #endif 610 return (NULL); 611 } 612 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 613 sctp_ifap->ifn_p = sctp_ifnp; 614 atomic_add_int(&sctp_ifnp->refcount, 1); 615 sctp_ifap->vrf_id = vrf_id; 616 sctp_ifap->ifa = ifa; 617 memcpy(&sctp_ifap->address, addr, addr->sa_len); 618 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 619 sctp_ifap->flags = ifa_flags; 620 /* Set scope */ 621 switch (sctp_ifap->address.sa.sa_family) { 622 #ifdef INET 623 case AF_INET: 624 { 625 struct sockaddr_in *sin; 626 627 sin = &sctp_ifap->address.sin; 628 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 629 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 630 sctp_ifap->src_is_loop = 1; 631 } 632 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 633 sctp_ifap->src_is_priv = 1; 634 } 635 sctp_ifnp->num_v4++; 636 if (new_ifn_af) 637 new_ifn_af = AF_INET; 638 break; 639 } 640 #endif 641 #ifdef INET6 642 case AF_INET6: 643 { 644 /* ok to use deprecated addresses? */ 645 struct sockaddr_in6 *sin6; 646 647 sin6 = &sctp_ifap->address.sin6; 648 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 649 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 650 sctp_ifap->src_is_loop = 1; 651 } 652 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 653 sctp_ifap->src_is_priv = 1; 654 } 655 sctp_ifnp->num_v6++; 656 if (new_ifn_af) 657 new_ifn_af = AF_INET6; 658 break; 659 } 660 #endif 661 default: 662 new_ifn_af = 0; 663 break; 664 } 665 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 666 667 if ((sctp_ifap->src_is_priv == 0) && 668 (sctp_ifap->src_is_loop == 0)) { 669 sctp_ifap->src_is_glob = 1; 670 } 671 SCTP_IPI_ADDR_WLOCK(); 672 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 673 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 674 sctp_ifap->refcount = 1; 675 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 676 sctp_ifnp->ifa_count++; 677 vrf->total_ifa_count++; 678 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 679 if (new_ifn_af) { 680 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 681 sctp_ifnp->registered_af = new_ifn_af; 682 } 683 SCTP_IPI_ADDR_WUNLOCK(); 684 if (dynamic_add) { 685 /* 686 * Bump up the refcount so that when the timer completes it 687 * will drop back down. 688 */ 689 struct sctp_laddr *wi; 690 691 atomic_add_int(&sctp_ifap->refcount, 1); 692 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 693 if (wi == NULL) { 694 /* 695 * Gak, what can we do? We have lost an address 696 * change can you say HOSED? 697 */ 698 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 699 /* Opps, must decrement the count */ 700 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 701 if_name); 702 return (NULL); 703 } 704 SCTP_INCR_LADDR_COUNT(); 705 memset(wi, 0, sizeof(*wi)); 706 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 707 wi->ifa = sctp_ifap; 708 wi->action = SCTP_ADD_IP_ADDRESS; 709 710 SCTP_WQ_ADDR_LOCK(); 711 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 712 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 713 (struct sctp_inpcb *)NULL, 714 (struct sctp_tcb *)NULL, 715 (struct sctp_nets *)NULL); 716 SCTP_WQ_ADDR_UNLOCK(); 717 } else { 718 /* it's ready for use */ 719 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 720 } 721 return (sctp_ifap); 722 } 723 724 void 725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 726 uint32_t ifn_index, const char *if_name) 727 { 728 struct sctp_vrf *vrf; 729 struct sctp_ifa *sctp_ifap = NULL; 730 731 SCTP_IPI_ADDR_WLOCK(); 732 vrf = sctp_find_vrf(vrf_id); 733 if (vrf == NULL) { 734 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 735 goto out_now; 736 } 737 #ifdef SCTP_DEBUG 738 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 739 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 740 #endif 741 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 742 if (sctp_ifap) { 743 /* Validate the delete */ 744 if (sctp_ifap->ifn_p) { 745 int valid = 0; 746 747 /*- 748 * The name has priority over the ifn_index 749 * if its given. We do this especially for 750 * panda who might recycle indexes fast. 751 */ 752 if (if_name) { 753 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 754 /* They match its a correct delete */ 755 valid = 1; 756 } 757 } 758 if (!valid) { 759 /* last ditch check ifn_index */ 760 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 761 valid = 1; 762 } 763 } 764 if (!valid) { 765 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 766 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 768 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 769 SCTP_IPI_ADDR_WUNLOCK(); 770 return; 771 } 772 } 773 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 774 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 775 /* 776 * We don't set the flag. This means that the structure will 777 * hang around in EP's that have bound specific to it until 778 * they close. This gives us TCP like behavior if someone 779 * removes an address (or for that matter adds it right 780 * back). 781 */ 782 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 783 vrf->total_ifa_count--; 784 LIST_REMOVE(sctp_ifap, next_bucket); 785 sctp_remove_ifa_from_ifn(sctp_ifap); 786 } 787 #ifdef SCTP_DEBUG 788 else { 789 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 790 ifn_index); 791 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 792 } 793 #endif 794 795 out_now: 796 SCTP_IPI_ADDR_WUNLOCK(); 797 if (sctp_ifap) { 798 struct sctp_laddr *wi; 799 800 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 801 if (wi == NULL) { 802 /* 803 * Gak, what can we do? We have lost an address 804 * change can you say HOSED? 805 */ 806 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 807 808 /* Oops, must decrement the count */ 809 sctp_free_ifa(sctp_ifap); 810 return; 811 } 812 SCTP_INCR_LADDR_COUNT(); 813 memset(wi, 0, sizeof(*wi)); 814 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 815 wi->ifa = sctp_ifap; 816 wi->action = SCTP_DEL_IP_ADDRESS; 817 SCTP_WQ_ADDR_LOCK(); 818 /* 819 * Should this really be a tailq? As it is we will process 820 * the newest first :-0 821 */ 822 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 823 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 824 (struct sctp_inpcb *)NULL, 825 (struct sctp_tcb *)NULL, 826 (struct sctp_nets *)NULL); 827 SCTP_WQ_ADDR_UNLOCK(); 828 } 829 return; 830 } 831 832 833 static int 834 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 835 { 836 int loopback_scope; 837 #if defined(INET) 838 int ipv4_local_scope, ipv4_addr_legal; 839 #endif 840 #if defined(INET6) 841 int local_scope, site_scope, ipv6_addr_legal; 842 #endif 843 struct sctp_vrf *vrf; 844 struct sctp_ifn *sctp_ifn; 845 struct sctp_ifa *sctp_ifa; 846 847 loopback_scope = stcb->asoc.scope.loopback_scope; 848 #if defined(INET) 849 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 850 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 851 #endif 852 #if defined(INET6) 853 local_scope = stcb->asoc.scope.local_scope; 854 site_scope = stcb->asoc.scope.site_scope; 855 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 856 #endif 857 858 SCTP_IPI_ADDR_RLOCK(); 859 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 860 if (vrf == NULL) { 861 /* no vrf, no addresses */ 862 SCTP_IPI_ADDR_RUNLOCK(); 863 return (0); 864 } 865 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 866 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 867 if ((loopback_scope == 0) && 868 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 869 continue; 870 } 871 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 872 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 873 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 874 /* 875 * We allow pending addresses, where 876 * we have sent an asconf-add to be 877 * considered valid. 878 */ 879 continue; 880 } 881 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 882 continue; 883 } 884 switch (sctp_ifa->address.sa.sa_family) { 885 #ifdef INET 886 case AF_INET: 887 if (ipv4_addr_legal) { 888 struct sockaddr_in *sin, 889 *rsin; 890 891 sin = &sctp_ifa->address.sin; 892 rsin = (struct sockaddr_in *)to; 893 if ((ipv4_local_scope == 0) && 894 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 895 continue; 896 } 897 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 898 &sin->sin_addr) != 0) { 899 continue; 900 } 901 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 902 SCTP_IPI_ADDR_RUNLOCK(); 903 return (1); 904 } 905 } 906 break; 907 #endif 908 #ifdef INET6 909 case AF_INET6: 910 if (ipv6_addr_legal) { 911 struct sockaddr_in6 *sin6, 912 *rsin6; 913 914 sin6 = &sctp_ifa->address.sin6; 915 rsin6 = (struct sockaddr_in6 *)to; 916 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 917 &sin6->sin6_addr) != 0) { 918 continue; 919 } 920 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 921 if (local_scope == 0) 922 continue; 923 if (sin6->sin6_scope_id == 0) { 924 if (sa6_recoverscope(sin6) != 0) 925 continue; 926 } 927 } 928 if ((site_scope == 0) && 929 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 930 continue; 931 } 932 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 933 SCTP_IPI_ADDR_RUNLOCK(); 934 return (1); 935 } 936 } 937 break; 938 #endif 939 default: 940 /* TSNH */ 941 break; 942 } 943 } 944 } 945 } else { 946 struct sctp_laddr *laddr; 947 948 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 949 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 950 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 951 continue; 952 } 953 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 954 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 955 /* 956 * We allow pending addresses, where we have 957 * sent an asconf-add to be considered 958 * valid. 959 */ 960 continue; 961 } 962 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 963 continue; 964 } 965 switch (to->sa_family) { 966 #ifdef INET 967 case AF_INET: 968 { 969 struct sockaddr_in *sin, *rsin; 970 971 sin = &laddr->ifa->address.sin; 972 rsin = (struct sockaddr_in *)to; 973 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 974 SCTP_IPI_ADDR_RUNLOCK(); 975 return (1); 976 } 977 break; 978 } 979 #endif 980 #ifdef INET6 981 case AF_INET6: 982 { 983 struct sockaddr_in6 *sin6, *rsin6; 984 985 sin6 = &laddr->ifa->address.sin6; 986 rsin6 = (struct sockaddr_in6 *)to; 987 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 988 SCTP_IPI_ADDR_RUNLOCK(); 989 return (1); 990 } 991 break; 992 } 993 994 #endif 995 default: 996 /* TSNH */ 997 break; 998 } 999 1000 } 1001 } 1002 SCTP_IPI_ADDR_RUNLOCK(); 1003 return (0); 1004 } 1005 1006 1007 static struct sctp_tcb * 1008 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1009 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1010 { 1011 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1012 /* 1013 * If we support the TCP model, then we must now dig through to see 1014 * if we can find our endpoint in the list of tcp ep's. 1015 */ 1016 uint16_t lport, rport; 1017 struct sctppcbhead *ephead; 1018 struct sctp_inpcb *inp; 1019 struct sctp_laddr *laddr; 1020 struct sctp_tcb *stcb; 1021 struct sctp_nets *net; 1022 1023 if ((to == NULL) || (from == NULL)) { 1024 return (NULL); 1025 } 1026 switch (to->sa_family) { 1027 #ifdef INET 1028 case AF_INET: 1029 if (from->sa_family == AF_INET) { 1030 lport = ((struct sockaddr_in *)to)->sin_port; 1031 rport = ((struct sockaddr_in *)from)->sin_port; 1032 } else { 1033 return (NULL); 1034 } 1035 break; 1036 #endif 1037 #ifdef INET6 1038 case AF_INET6: 1039 if (from->sa_family == AF_INET6) { 1040 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1041 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1042 } else { 1043 return (NULL); 1044 } 1045 break; 1046 #endif 1047 default: 1048 return (NULL); 1049 } 1050 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1051 /* 1052 * Ok now for each of the guys in this bucket we must look and see: 1053 * - Does the remote port match. - Does there single association's 1054 * addresses match this address (to). If so we update p_ep to point 1055 * to this ep and return the tcb from it. 1056 */ 1057 LIST_FOREACH(inp, ephead, sctp_hash) { 1058 SCTP_INP_RLOCK(inp); 1059 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1060 SCTP_INP_RUNLOCK(inp); 1061 continue; 1062 } 1063 if (lport != inp->sctp_lport) { 1064 SCTP_INP_RUNLOCK(inp); 1065 continue; 1066 } 1067 switch (to->sa_family) { 1068 #ifdef INET 1069 case AF_INET: 1070 { 1071 struct sockaddr_in *sin; 1072 1073 sin = (struct sockaddr_in *)to; 1074 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1075 &sin->sin_addr) != 0) { 1076 SCTP_INP_RUNLOCK(inp); 1077 continue; 1078 } 1079 break; 1080 } 1081 #endif 1082 #ifdef INET6 1083 case AF_INET6: 1084 { 1085 struct sockaddr_in6 *sin6; 1086 1087 sin6 = (struct sockaddr_in6 *)to; 1088 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1089 &sin6->sin6_addr) != 0) { 1090 SCTP_INP_RUNLOCK(inp); 1091 continue; 1092 } 1093 break; 1094 } 1095 #endif 1096 default: 1097 SCTP_INP_RUNLOCK(inp); 1098 continue; 1099 } 1100 if (inp->def_vrf_id != vrf_id) { 1101 SCTP_INP_RUNLOCK(inp); 1102 continue; 1103 } 1104 /* check to see if the ep has one of the addresses */ 1105 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1106 /* We are NOT bound all, so look further */ 1107 int match = 0; 1108 1109 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1110 1111 if (laddr->ifa == NULL) { 1112 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1113 continue; 1114 } 1115 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1116 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1117 continue; 1118 } 1119 if (laddr->ifa->address.sa.sa_family == 1120 to->sa_family) { 1121 /* see if it matches */ 1122 #ifdef INET 1123 if (from->sa_family == AF_INET) { 1124 struct sockaddr_in *intf_addr, 1125 *sin; 1126 1127 intf_addr = &laddr->ifa->address.sin; 1128 sin = (struct sockaddr_in *)to; 1129 if (sin->sin_addr.s_addr == 1130 intf_addr->sin_addr.s_addr) { 1131 match = 1; 1132 break; 1133 } 1134 } 1135 #endif 1136 #ifdef INET6 1137 if (from->sa_family == AF_INET6) { 1138 struct sockaddr_in6 *intf_addr6; 1139 struct sockaddr_in6 *sin6; 1140 1141 sin6 = (struct sockaddr_in6 *) 1142 to; 1143 intf_addr6 = &laddr->ifa->address.sin6; 1144 1145 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1146 intf_addr6)) { 1147 match = 1; 1148 break; 1149 } 1150 } 1151 #endif 1152 } 1153 } 1154 if (match == 0) { 1155 /* This endpoint does not have this address */ 1156 SCTP_INP_RUNLOCK(inp); 1157 continue; 1158 } 1159 } 1160 /* 1161 * Ok if we hit here the ep has the address, does it hold 1162 * the tcb? 1163 */ 1164 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1165 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1166 if (stcb == NULL) { 1167 SCTP_INP_RUNLOCK(inp); 1168 continue; 1169 } 1170 SCTP_TCB_LOCK(stcb); 1171 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1172 SCTP_TCB_UNLOCK(stcb); 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 if (stcb->rport != rport) { 1177 /* remote port does not match. */ 1178 SCTP_TCB_UNLOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 continue; 1181 } 1182 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1183 SCTP_TCB_UNLOCK(stcb); 1184 SCTP_INP_RUNLOCK(inp); 1185 continue; 1186 } 1187 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1188 SCTP_TCB_UNLOCK(stcb); 1189 SCTP_INP_RUNLOCK(inp); 1190 continue; 1191 } 1192 /* Does this TCB have a matching address? */ 1193 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1194 1195 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1196 /* not the same family, can't be a match */ 1197 continue; 1198 } 1199 switch (from->sa_family) { 1200 #ifdef INET 1201 case AF_INET: 1202 { 1203 struct sockaddr_in *sin, *rsin; 1204 1205 sin = (struct sockaddr_in *)&net->ro._l_addr; 1206 rsin = (struct sockaddr_in *)from; 1207 if (sin->sin_addr.s_addr == 1208 rsin->sin_addr.s_addr) { 1209 /* found it */ 1210 if (netp != NULL) { 1211 *netp = net; 1212 } 1213 /* 1214 * Update the endpoint 1215 * pointer 1216 */ 1217 *inp_p = inp; 1218 SCTP_INP_RUNLOCK(inp); 1219 return (stcb); 1220 } 1221 break; 1222 } 1223 #endif 1224 #ifdef INET6 1225 case AF_INET6: 1226 { 1227 struct sockaddr_in6 *sin6, *rsin6; 1228 1229 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1230 rsin6 = (struct sockaddr_in6 *)from; 1231 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1232 rsin6)) { 1233 /* found it */ 1234 if (netp != NULL) { 1235 *netp = net; 1236 } 1237 /* 1238 * Update the endpoint 1239 * pointer 1240 */ 1241 *inp_p = inp; 1242 SCTP_INP_RUNLOCK(inp); 1243 return (stcb); 1244 } 1245 break; 1246 } 1247 #endif 1248 default: 1249 /* TSNH */ 1250 break; 1251 } 1252 } 1253 SCTP_TCB_UNLOCK(stcb); 1254 SCTP_INP_RUNLOCK(inp); 1255 } 1256 return (NULL); 1257 } 1258 1259 1260 /* 1261 * rules for use 1262 * 1263 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1264 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1265 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1266 * NULL. 1267 */ 1268 1269 struct sctp_tcb * 1270 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1271 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1272 { 1273 struct sctpasochead *head; 1274 struct sctp_inpcb *inp; 1275 struct sctp_tcb *stcb = NULL; 1276 struct sctp_nets *net; 1277 uint16_t rport; 1278 1279 inp = *inp_p; 1280 switch (remote->sa_family) { 1281 #ifdef INET 1282 case AF_INET: 1283 rport = (((struct sockaddr_in *)remote)->sin_port); 1284 break; 1285 #endif 1286 #ifdef INET6 1287 case AF_INET6: 1288 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1289 break; 1290 #endif 1291 default: 1292 return (NULL); 1293 } 1294 if (locked_tcb) { 1295 /* 1296 * UN-lock so we can do proper locking here this occurs when 1297 * called from load_addresses_from_init. 1298 */ 1299 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1300 SCTP_TCB_UNLOCK(locked_tcb); 1301 } 1302 SCTP_INP_INFO_RLOCK(); 1303 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1304 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1305 /*- 1306 * Now either this guy is our listener or it's the 1307 * connector. If it is the one that issued the connect, then 1308 * it's only chance is to be the first TCB in the list. If 1309 * it is the acceptor, then do the special_lookup to hash 1310 * and find the real inp. 1311 */ 1312 if ((inp->sctp_socket) && SCTP_IS_LISTENING(inp)) { 1313 /* to is peer addr, from is my addr */ 1314 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1315 netp, inp->def_vrf_id); 1316 if ((stcb != NULL) && (locked_tcb == NULL)) { 1317 /* we have a locked tcb, lower refcount */ 1318 SCTP_INP_DECR_REF(inp); 1319 } 1320 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1321 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1322 SCTP_TCB_LOCK(locked_tcb); 1323 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1324 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1325 } 1326 SCTP_INP_INFO_RUNLOCK(); 1327 return (stcb); 1328 } else { 1329 SCTP_INP_WLOCK(inp); 1330 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1331 goto null_return; 1332 } 1333 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1334 if (stcb == NULL) { 1335 goto null_return; 1336 } 1337 SCTP_TCB_LOCK(stcb); 1338 1339 if (stcb->rport != rport) { 1340 /* remote port does not match. */ 1341 SCTP_TCB_UNLOCK(stcb); 1342 goto null_return; 1343 } 1344 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1345 SCTP_TCB_UNLOCK(stcb); 1346 goto null_return; 1347 } 1348 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1349 SCTP_TCB_UNLOCK(stcb); 1350 goto null_return; 1351 } 1352 /* now look at the list of remote addresses */ 1353 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1354 #ifdef INVARIANTS 1355 if (net == (TAILQ_NEXT(net, sctp_next))) { 1356 panic("Corrupt net list"); 1357 } 1358 #endif 1359 if (net->ro._l_addr.sa.sa_family != 1360 remote->sa_family) { 1361 /* not the same family */ 1362 continue; 1363 } 1364 switch (remote->sa_family) { 1365 #ifdef INET 1366 case AF_INET: 1367 { 1368 struct sockaddr_in *sin, 1369 *rsin; 1370 1371 sin = (struct sockaddr_in *) 1372 &net->ro._l_addr; 1373 rsin = (struct sockaddr_in *)remote; 1374 if (sin->sin_addr.s_addr == 1375 rsin->sin_addr.s_addr) { 1376 /* found it */ 1377 if (netp != NULL) { 1378 *netp = net; 1379 } 1380 if (locked_tcb == NULL) { 1381 SCTP_INP_DECR_REF(inp); 1382 } else if (locked_tcb != stcb) { 1383 SCTP_TCB_LOCK(locked_tcb); 1384 } 1385 if (locked_tcb) { 1386 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1387 } 1388 SCTP_INP_WUNLOCK(inp); 1389 SCTP_INP_INFO_RUNLOCK(); 1390 return (stcb); 1391 } 1392 break; 1393 } 1394 #endif 1395 #ifdef INET6 1396 case AF_INET6: 1397 { 1398 struct sockaddr_in6 *sin6, 1399 *rsin6; 1400 1401 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1402 rsin6 = (struct sockaddr_in6 *)remote; 1403 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1404 rsin6)) { 1405 /* found it */ 1406 if (netp != NULL) { 1407 *netp = net; 1408 } 1409 if (locked_tcb == NULL) { 1410 SCTP_INP_DECR_REF(inp); 1411 } else if (locked_tcb != stcb) { 1412 SCTP_TCB_LOCK(locked_tcb); 1413 } 1414 if (locked_tcb) { 1415 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1416 } 1417 SCTP_INP_WUNLOCK(inp); 1418 SCTP_INP_INFO_RUNLOCK(); 1419 return (stcb); 1420 } 1421 break; 1422 } 1423 #endif 1424 default: 1425 /* TSNH */ 1426 break; 1427 } 1428 } 1429 SCTP_TCB_UNLOCK(stcb); 1430 } 1431 } else { 1432 SCTP_INP_WLOCK(inp); 1433 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1434 goto null_return; 1435 } 1436 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1437 inp->sctp_hashmark)]; 1438 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1439 if (stcb->rport != rport) { 1440 /* remote port does not match */ 1441 continue; 1442 } 1443 SCTP_TCB_LOCK(stcb); 1444 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1445 SCTP_TCB_UNLOCK(stcb); 1446 continue; 1447 } 1448 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1449 SCTP_TCB_UNLOCK(stcb); 1450 continue; 1451 } 1452 /* now look at the list of remote addresses */ 1453 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1454 #ifdef INVARIANTS 1455 if (net == (TAILQ_NEXT(net, sctp_next))) { 1456 panic("Corrupt net list"); 1457 } 1458 #endif 1459 if (net->ro._l_addr.sa.sa_family != 1460 remote->sa_family) { 1461 /* not the same family */ 1462 continue; 1463 } 1464 switch (remote->sa_family) { 1465 #ifdef INET 1466 case AF_INET: 1467 { 1468 struct sockaddr_in *sin, 1469 *rsin; 1470 1471 sin = (struct sockaddr_in *) 1472 &net->ro._l_addr; 1473 rsin = (struct sockaddr_in *)remote; 1474 if (sin->sin_addr.s_addr == 1475 rsin->sin_addr.s_addr) { 1476 /* found it */ 1477 if (netp != NULL) { 1478 *netp = net; 1479 } 1480 if (locked_tcb == NULL) { 1481 SCTP_INP_DECR_REF(inp); 1482 } else if (locked_tcb != stcb) { 1483 SCTP_TCB_LOCK(locked_tcb); 1484 } 1485 if (locked_tcb) { 1486 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1487 } 1488 SCTP_INP_WUNLOCK(inp); 1489 SCTP_INP_INFO_RUNLOCK(); 1490 return (stcb); 1491 } 1492 break; 1493 } 1494 #endif 1495 #ifdef INET6 1496 case AF_INET6: 1497 { 1498 struct sockaddr_in6 *sin6, 1499 *rsin6; 1500 1501 sin6 = (struct sockaddr_in6 *) 1502 &net->ro._l_addr; 1503 rsin6 = (struct sockaddr_in6 *)remote; 1504 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1505 rsin6)) { 1506 /* found it */ 1507 if (netp != NULL) { 1508 *netp = net; 1509 } 1510 if (locked_tcb == NULL) { 1511 SCTP_INP_DECR_REF(inp); 1512 } else if (locked_tcb != stcb) { 1513 SCTP_TCB_LOCK(locked_tcb); 1514 } 1515 if (locked_tcb) { 1516 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1517 } 1518 SCTP_INP_WUNLOCK(inp); 1519 SCTP_INP_INFO_RUNLOCK(); 1520 return (stcb); 1521 } 1522 break; 1523 } 1524 #endif 1525 default: 1526 /* TSNH */ 1527 break; 1528 } 1529 } 1530 SCTP_TCB_UNLOCK(stcb); 1531 } 1532 } 1533 null_return: 1534 /* clean up for returning null */ 1535 if (locked_tcb) { 1536 SCTP_TCB_LOCK(locked_tcb); 1537 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1538 } 1539 SCTP_INP_WUNLOCK(inp); 1540 SCTP_INP_INFO_RUNLOCK(); 1541 /* not found */ 1542 return (NULL); 1543 } 1544 1545 1546 /* 1547 * Find an association for a specific endpoint using the association id given 1548 * out in the COMM_UP notification 1549 */ 1550 struct sctp_tcb * 1551 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1552 { 1553 /* 1554 * Use my the assoc_id to find a endpoint 1555 */ 1556 struct sctpasochead *head; 1557 struct sctp_tcb *stcb; 1558 uint32_t id; 1559 1560 if (inp == NULL) { 1561 SCTP_PRINTF("TSNH ep_associd\n"); 1562 return (NULL); 1563 } 1564 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1565 SCTP_PRINTF("TSNH ep_associd0\n"); 1566 return (NULL); 1567 } 1568 id = (uint32_t)asoc_id; 1569 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1570 if (head == NULL) { 1571 /* invalid id TSNH */ 1572 SCTP_PRINTF("TSNH ep_associd1\n"); 1573 return (NULL); 1574 } 1575 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1576 if (stcb->asoc.assoc_id == id) { 1577 if (inp != stcb->sctp_ep) { 1578 /* 1579 * some other guy has the same id active (id 1580 * collision ??). 1581 */ 1582 SCTP_PRINTF("TSNH ep_associd2\n"); 1583 continue; 1584 } 1585 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1586 continue; 1587 } 1588 if (want_lock) { 1589 SCTP_TCB_LOCK(stcb); 1590 } 1591 return (stcb); 1592 } 1593 } 1594 return (NULL); 1595 } 1596 1597 1598 struct sctp_tcb * 1599 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1600 { 1601 struct sctp_tcb *stcb; 1602 1603 SCTP_INP_RLOCK(inp); 1604 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1605 SCTP_INP_RUNLOCK(inp); 1606 return (stcb); 1607 } 1608 1609 1610 /* 1611 * Endpoint probe expects that the INP_INFO is locked. 1612 */ 1613 static struct sctp_inpcb * 1614 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1615 uint16_t lport, uint32_t vrf_id) 1616 { 1617 struct sctp_inpcb *inp; 1618 struct sctp_laddr *laddr; 1619 #ifdef INET 1620 struct sockaddr_in *sin; 1621 #endif 1622 #ifdef INET6 1623 struct sockaddr_in6 *sin6; 1624 struct sockaddr_in6 *intf_addr6; 1625 #endif 1626 int fnd; 1627 1628 #ifdef INET 1629 sin = NULL; 1630 #endif 1631 #ifdef INET6 1632 sin6 = NULL; 1633 #endif 1634 switch (nam->sa_family) { 1635 #ifdef INET 1636 case AF_INET: 1637 sin = (struct sockaddr_in *)nam; 1638 break; 1639 #endif 1640 #ifdef INET6 1641 case AF_INET6: 1642 sin6 = (struct sockaddr_in6 *)nam; 1643 break; 1644 #endif 1645 default: 1646 /* unsupported family */ 1647 return (NULL); 1648 } 1649 1650 if (head == NULL) 1651 return (NULL); 1652 1653 LIST_FOREACH(inp, head, sctp_hash) { 1654 SCTP_INP_RLOCK(inp); 1655 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1656 SCTP_INP_RUNLOCK(inp); 1657 continue; 1658 } 1659 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1660 (inp->sctp_lport == lport)) { 1661 /* got it */ 1662 switch (nam->sa_family) { 1663 #ifdef INET 1664 case AF_INET: 1665 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1666 SCTP_IPV6_V6ONLY(inp)) { 1667 /* 1668 * IPv4 on a IPv6 socket with ONLY 1669 * IPv6 set 1670 */ 1671 SCTP_INP_RUNLOCK(inp); 1672 continue; 1673 } 1674 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1675 &sin->sin_addr) != 0) { 1676 SCTP_INP_RUNLOCK(inp); 1677 continue; 1678 } 1679 break; 1680 #endif 1681 #ifdef INET6 1682 case AF_INET6: 1683 /* 1684 * A V6 address and the endpoint is NOT 1685 * bound V6 1686 */ 1687 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1688 SCTP_INP_RUNLOCK(inp); 1689 continue; 1690 } 1691 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1692 &sin6->sin6_addr) != 0) { 1693 SCTP_INP_RUNLOCK(inp); 1694 continue; 1695 } 1696 break; 1697 #endif 1698 default: 1699 break; 1700 } 1701 /* does a VRF id match? */ 1702 fnd = 0; 1703 if (inp->def_vrf_id == vrf_id) 1704 fnd = 1; 1705 1706 SCTP_INP_RUNLOCK(inp); 1707 if (!fnd) 1708 continue; 1709 return (inp); 1710 } 1711 SCTP_INP_RUNLOCK(inp); 1712 } 1713 switch (nam->sa_family) { 1714 #ifdef INET 1715 case AF_INET: 1716 if (sin->sin_addr.s_addr == INADDR_ANY) { 1717 /* Can't hunt for one that has no address specified */ 1718 return (NULL); 1719 } 1720 break; 1721 #endif 1722 #ifdef INET6 1723 case AF_INET6: 1724 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1725 /* Can't hunt for one that has no address specified */ 1726 return (NULL); 1727 } 1728 break; 1729 #endif 1730 default: 1731 break; 1732 } 1733 /* 1734 * ok, not bound to all so see if we can find a EP bound to this 1735 * address. 1736 */ 1737 LIST_FOREACH(inp, head, sctp_hash) { 1738 SCTP_INP_RLOCK(inp); 1739 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1740 SCTP_INP_RUNLOCK(inp); 1741 continue; 1742 } 1743 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1744 SCTP_INP_RUNLOCK(inp); 1745 continue; 1746 } 1747 /* 1748 * Ok this could be a likely candidate, look at all of its 1749 * addresses 1750 */ 1751 if (inp->sctp_lport != lport) { 1752 SCTP_INP_RUNLOCK(inp); 1753 continue; 1754 } 1755 /* does a VRF id match? */ 1756 fnd = 0; 1757 if (inp->def_vrf_id == vrf_id) 1758 fnd = 1; 1759 1760 if (!fnd) { 1761 SCTP_INP_RUNLOCK(inp); 1762 continue; 1763 } 1764 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1765 if (laddr->ifa == NULL) { 1766 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1767 __func__); 1768 continue; 1769 } 1770 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1771 (void *)laddr->ifa); 1772 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1773 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1774 continue; 1775 } 1776 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1777 /* possible, see if it matches */ 1778 switch (nam->sa_family) { 1779 #ifdef INET 1780 case AF_INET: 1781 if (sin->sin_addr.s_addr == 1782 laddr->ifa->address.sin.sin_addr.s_addr) { 1783 SCTP_INP_RUNLOCK(inp); 1784 return (inp); 1785 } 1786 break; 1787 #endif 1788 #ifdef INET6 1789 case AF_INET6: 1790 intf_addr6 = &laddr->ifa->address.sin6; 1791 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1792 intf_addr6)) { 1793 SCTP_INP_RUNLOCK(inp); 1794 return (inp); 1795 } 1796 break; 1797 #endif 1798 } 1799 } 1800 } 1801 SCTP_INP_RUNLOCK(inp); 1802 } 1803 return (NULL); 1804 } 1805 1806 1807 static struct sctp_inpcb * 1808 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1809 { 1810 struct sctppcbhead *head; 1811 struct sctp_inpcb *t_inp; 1812 int fnd; 1813 1814 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1815 SCTP_BASE_INFO(hashmark))]; 1816 LIST_FOREACH(t_inp, head, sctp_hash) { 1817 if (t_inp->sctp_lport != lport) { 1818 continue; 1819 } 1820 /* is it in the VRF in question */ 1821 fnd = 0; 1822 if (t_inp->def_vrf_id == vrf_id) 1823 fnd = 1; 1824 if (!fnd) 1825 continue; 1826 1827 /* This one is in use. */ 1828 /* check the v6/v4 binding issue */ 1829 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1830 SCTP_IPV6_V6ONLY(t_inp)) { 1831 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1832 /* collision in V6 space */ 1833 return (t_inp); 1834 } else { 1835 /* inp is BOUND_V4 no conflict */ 1836 continue; 1837 } 1838 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1839 /* t_inp is bound v4 and v6, conflict always */ 1840 return (t_inp); 1841 } else { 1842 /* t_inp is bound only V4 */ 1843 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1844 SCTP_IPV6_V6ONLY(inp)) { 1845 /* no conflict */ 1846 continue; 1847 } 1848 /* else fall through to conflict */ 1849 } 1850 return (t_inp); 1851 } 1852 return (NULL); 1853 } 1854 1855 1856 int 1857 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1858 { 1859 /* For 1-2-1 with port reuse */ 1860 struct sctppcbhead *head; 1861 struct sctp_inpcb *tinp, *ninp; 1862 1863 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1864 /* only works with port reuse on */ 1865 return (-1); 1866 } 1867 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1868 return (0); 1869 } 1870 SCTP_INP_RUNLOCK(inp); 1871 SCTP_INP_INFO_WLOCK(); 1872 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1873 SCTP_BASE_INFO(hashmark))]; 1874 /* Kick out all non-listeners to the TCP hash */ 1875 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1876 if (tinp->sctp_lport != inp->sctp_lport) { 1877 continue; 1878 } 1879 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1880 continue; 1881 } 1882 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1883 continue; 1884 } 1885 if (SCTP_IS_LISTENING(tinp)) { 1886 continue; 1887 } 1888 SCTP_INP_WLOCK(tinp); 1889 LIST_REMOVE(tinp, sctp_hash); 1890 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1891 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1892 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1893 SCTP_INP_WUNLOCK(tinp); 1894 } 1895 SCTP_INP_WLOCK(inp); 1896 /* Pull from where he was */ 1897 LIST_REMOVE(inp, sctp_hash); 1898 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1899 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1900 LIST_INSERT_HEAD(head, inp, sctp_hash); 1901 SCTP_INP_WUNLOCK(inp); 1902 SCTP_INP_RLOCK(inp); 1903 SCTP_INP_INFO_WUNLOCK(); 1904 return (0); 1905 } 1906 1907 1908 struct sctp_inpcb * 1909 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1910 uint32_t vrf_id) 1911 { 1912 /* 1913 * First we check the hash table to see if someone has this port 1914 * bound with just the port. 1915 */ 1916 struct sctp_inpcb *inp; 1917 struct sctppcbhead *head; 1918 int lport; 1919 unsigned int i; 1920 #ifdef INET 1921 struct sockaddr_in *sin; 1922 #endif 1923 #ifdef INET6 1924 struct sockaddr_in6 *sin6; 1925 #endif 1926 1927 switch (nam->sa_family) { 1928 #ifdef INET 1929 case AF_INET: 1930 sin = (struct sockaddr_in *)nam; 1931 lport = sin->sin_port; 1932 break; 1933 #endif 1934 #ifdef INET6 1935 case AF_INET6: 1936 sin6 = (struct sockaddr_in6 *)nam; 1937 lport = sin6->sin6_port; 1938 break; 1939 #endif 1940 default: 1941 return (NULL); 1942 } 1943 /* 1944 * I could cheat here and just cast to one of the types but we will 1945 * do it right. It also provides the check against an Unsupported 1946 * type too. 1947 */ 1948 /* Find the head of the ALLADDR chain */ 1949 if (have_lock == 0) { 1950 SCTP_INP_INFO_RLOCK(); 1951 } 1952 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1953 SCTP_BASE_INFO(hashmark))]; 1954 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1955 1956 /* 1957 * If the TCP model exists it could be that the main listening 1958 * endpoint is gone but there still exists a connected socket for 1959 * this guy. If so we can return the first one that we find. This 1960 * may NOT be the correct one so the caller should be wary on the 1961 * returned INP. Currently the only caller that sets find_tcp_pool 1962 * is in bindx where we are verifying that a user CAN bind the 1963 * address. He either has bound it already, or someone else has, or 1964 * its open to bind, so this is good enough. 1965 */ 1966 if (inp == NULL && find_tcp_pool) { 1967 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1968 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1969 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1970 if (inp) { 1971 break; 1972 } 1973 } 1974 } 1975 if (inp) { 1976 SCTP_INP_INCR_REF(inp); 1977 } 1978 if (have_lock == 0) { 1979 SCTP_INP_INFO_RUNLOCK(); 1980 } 1981 return (inp); 1982 } 1983 1984 1985 /* 1986 * Find an association for an endpoint with the pointer to whom you want to 1987 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1988 * need to change the *to to some other struct like a mbuf... 1989 */ 1990 struct sctp_tcb * 1991 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1992 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1993 uint32_t vrf_id) 1994 { 1995 struct sctp_inpcb *inp = NULL; 1996 struct sctp_tcb *stcb; 1997 1998 SCTP_INP_INFO_RLOCK(); 1999 if (find_tcp_pool) { 2000 if (inp_p != NULL) { 2001 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2002 vrf_id); 2003 } else { 2004 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2005 vrf_id); 2006 } 2007 if (stcb != NULL) { 2008 SCTP_INP_INFO_RUNLOCK(); 2009 return (stcb); 2010 } 2011 } 2012 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2013 if (inp_p != NULL) { 2014 *inp_p = inp; 2015 } 2016 SCTP_INP_INFO_RUNLOCK(); 2017 if (inp == NULL) { 2018 return (NULL); 2019 } 2020 /* 2021 * ok, we have an endpoint, now lets find the assoc for it (if any) 2022 * we now place the source address or from in the to of the find 2023 * endpoint call. Since in reality this chain is used from the 2024 * inbound packet side. 2025 */ 2026 if (inp_p != NULL) { 2027 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2028 NULL); 2029 } else { 2030 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2031 NULL); 2032 } 2033 return (stcb); 2034 } 2035 2036 2037 /* 2038 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2039 * find all addresses that the sender has specified in any address list. Each 2040 * address will be used to lookup the TCB and see if one exits. 2041 */ 2042 static struct sctp_tcb * 2043 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2044 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2045 struct sockaddr *dst) 2046 { 2047 struct sctp_paramhdr *phdr, param_buf; 2048 #if defined(INET) || defined(INET6) 2049 struct sctp_tcb *stcb; 2050 uint16_t ptype; 2051 #endif 2052 uint16_t plen; 2053 #ifdef INET 2054 struct sockaddr_in sin4; 2055 #endif 2056 #ifdef INET6 2057 struct sockaddr_in6 sin6; 2058 #endif 2059 2060 #ifdef INET 2061 memset(&sin4, 0, sizeof(sin4)); 2062 sin4.sin_len = sizeof(sin4); 2063 sin4.sin_family = AF_INET; 2064 sin4.sin_port = sh->src_port; 2065 #endif 2066 #ifdef INET6 2067 memset(&sin6, 0, sizeof(sin6)); 2068 sin6.sin6_len = sizeof(sin6); 2069 sin6.sin6_family = AF_INET6; 2070 sin6.sin6_port = sh->src_port; 2071 #endif 2072 2073 offset += sizeof(struct sctp_init_chunk); 2074 2075 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 2076 while (phdr != NULL) { 2077 /* now we must see if we want the parameter */ 2078 #if defined(INET) || defined(INET6) 2079 ptype = ntohs(phdr->param_type); 2080 #endif 2081 plen = ntohs(phdr->param_length); 2082 if (plen == 0) { 2083 break; 2084 } 2085 #ifdef INET 2086 if (ptype == SCTP_IPV4_ADDRESS && 2087 plen == sizeof(struct sctp_ipv4addr_param)) { 2088 /* Get the rest of the address */ 2089 struct sctp_ipv4addr_param ip4_param, *p4; 2090 2091 phdr = sctp_get_next_param(m, offset, 2092 (struct sctp_paramhdr *)&ip4_param, sizeof(ip4_param)); 2093 if (phdr == NULL) { 2094 return (NULL); 2095 } 2096 p4 = (struct sctp_ipv4addr_param *)phdr; 2097 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2098 /* look it up */ 2099 stcb = sctp_findassociation_ep_addr(inp_p, 2100 (struct sockaddr *)&sin4, netp, dst, NULL); 2101 if (stcb != NULL) { 2102 return (stcb); 2103 } 2104 } 2105 #endif 2106 #ifdef INET6 2107 if (ptype == SCTP_IPV6_ADDRESS && 2108 plen == sizeof(struct sctp_ipv6addr_param)) { 2109 /* Get the rest of the address */ 2110 struct sctp_ipv6addr_param ip6_param, *p6; 2111 2112 phdr = sctp_get_next_param(m, offset, 2113 (struct sctp_paramhdr *)&ip6_param, sizeof(ip6_param)); 2114 if (phdr == NULL) { 2115 return (NULL); 2116 } 2117 p6 = (struct sctp_ipv6addr_param *)phdr; 2118 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2119 /* look it up */ 2120 stcb = sctp_findassociation_ep_addr(inp_p, 2121 (struct sockaddr *)&sin6, netp, dst, NULL); 2122 if (stcb != NULL) { 2123 return (stcb); 2124 } 2125 } 2126 #endif 2127 offset += SCTP_SIZE32(plen); 2128 phdr = sctp_get_next_param(m, offset, ¶m_buf, 2129 sizeof(param_buf)); 2130 } 2131 return (NULL); 2132 } 2133 2134 static struct sctp_tcb * 2135 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2136 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2137 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2138 { 2139 /* 2140 * Use my vtag to hash. If we find it we then verify the source addr 2141 * is in the assoc. If all goes well we save a bit on rec of a 2142 * packet. 2143 */ 2144 struct sctpasochead *head; 2145 struct sctp_nets *net; 2146 struct sctp_tcb *stcb; 2147 2148 SCTP_INP_INFO_RLOCK(); 2149 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2150 SCTP_BASE_INFO(hashasocmark))]; 2151 LIST_FOREACH(stcb, head, sctp_asocs) { 2152 SCTP_INP_RLOCK(stcb->sctp_ep); 2153 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2154 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2155 continue; 2156 } 2157 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2158 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2159 continue; 2160 } 2161 SCTP_TCB_LOCK(stcb); 2162 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2163 if (stcb->asoc.my_vtag == vtag) { 2164 /* candidate */ 2165 if (stcb->rport != rport) { 2166 SCTP_TCB_UNLOCK(stcb); 2167 continue; 2168 } 2169 if (stcb->sctp_ep->sctp_lport != lport) { 2170 SCTP_TCB_UNLOCK(stcb); 2171 continue; 2172 } 2173 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2174 SCTP_TCB_UNLOCK(stcb); 2175 continue; 2176 } 2177 /* RRS:Need toaddr check here */ 2178 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2179 /* Endpoint does not own this address */ 2180 SCTP_TCB_UNLOCK(stcb); 2181 continue; 2182 } 2183 if (remote_tag) { 2184 /* 2185 * If we have both vtags that's all we match 2186 * on 2187 */ 2188 if (stcb->asoc.peer_vtag == remote_tag) { 2189 /* 2190 * If both tags match we consider it 2191 * conclusive and check NO 2192 * source/destination addresses 2193 */ 2194 goto conclusive; 2195 } 2196 } 2197 if (skip_src_check) { 2198 conclusive: 2199 if (from) { 2200 *netp = sctp_findnet(stcb, from); 2201 } else { 2202 *netp = NULL; /* unknown */ 2203 } 2204 if (inp_p) 2205 *inp_p = stcb->sctp_ep; 2206 SCTP_INP_INFO_RUNLOCK(); 2207 return (stcb); 2208 } 2209 net = sctp_findnet(stcb, from); 2210 if (net) { 2211 /* yep its him. */ 2212 *netp = net; 2213 SCTP_STAT_INCR(sctps_vtagexpress); 2214 *inp_p = stcb->sctp_ep; 2215 SCTP_INP_INFO_RUNLOCK(); 2216 return (stcb); 2217 } else { 2218 /* 2219 * not him, this should only happen in rare 2220 * cases so I peg it. 2221 */ 2222 SCTP_STAT_INCR(sctps_vtagbogus); 2223 } 2224 } 2225 SCTP_TCB_UNLOCK(stcb); 2226 } 2227 SCTP_INP_INFO_RUNLOCK(); 2228 return (NULL); 2229 } 2230 2231 2232 /* 2233 * Find an association with the pointer to the inbound IP packet. This can be 2234 * a IPv4 or IPv6 packet. 2235 */ 2236 struct sctp_tcb * 2237 sctp_findassociation_addr(struct mbuf *m, int offset, 2238 struct sockaddr *src, struct sockaddr *dst, 2239 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2240 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2241 { 2242 struct sctp_tcb *stcb; 2243 struct sctp_inpcb *inp; 2244 2245 if (sh->v_tag) { 2246 /* we only go down this path if vtag is non-zero */ 2247 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2248 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2249 if (stcb) { 2250 return (stcb); 2251 } 2252 } 2253 if (inp_p) { 2254 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2255 1, vrf_id); 2256 inp = *inp_p; 2257 } else { 2258 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2259 1, vrf_id); 2260 } 2261 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2262 if (stcb == NULL && inp) { 2263 /* Found a EP but not this address */ 2264 if ((ch->chunk_type == SCTP_INITIATION) || 2265 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2266 /*- 2267 * special hook, we do NOT return linp or an 2268 * association that is linked to an existing 2269 * association that is under the TCP pool (i.e. no 2270 * listener exists). The endpoint finding routine 2271 * will always find a listener before examining the 2272 * TCP pool. 2273 */ 2274 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2275 if (inp_p) { 2276 *inp_p = NULL; 2277 } 2278 return (NULL); 2279 } 2280 stcb = sctp_findassociation_special_addr(m, 2281 offset, sh, &inp, netp, dst); 2282 if (inp_p != NULL) { 2283 *inp_p = inp; 2284 } 2285 } 2286 } 2287 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2288 return (stcb); 2289 } 2290 2291 /* 2292 * lookup an association by an ASCONF lookup address. 2293 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2294 */ 2295 struct sctp_tcb * 2296 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2297 struct sockaddr *dst, struct sctphdr *sh, 2298 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2299 { 2300 struct sctp_tcb *stcb; 2301 union sctp_sockstore remote_store; 2302 struct sctp_paramhdr param_buf, *phdr; 2303 int ptype; 2304 int zero_address = 0; 2305 #ifdef INET 2306 struct sockaddr_in *sin; 2307 #endif 2308 #ifdef INET6 2309 struct sockaddr_in6 *sin6; 2310 #endif 2311 2312 memset(&remote_store, 0, sizeof(remote_store)); 2313 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2314 ¶m_buf, sizeof(struct sctp_paramhdr)); 2315 if (phdr == NULL) { 2316 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2317 __func__); 2318 return NULL; 2319 } 2320 ptype = (int)((uint32_t)ntohs(phdr->param_type)); 2321 /* get the correlation address */ 2322 switch (ptype) { 2323 #ifdef INET6 2324 case SCTP_IPV6_ADDRESS: 2325 { 2326 /* ipv6 address param */ 2327 struct sctp_ipv6addr_param *p6, p6_buf; 2328 2329 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2330 return NULL; 2331 } 2332 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2333 offset + sizeof(struct sctp_asconf_chunk), 2334 &p6_buf.ph, sizeof(p6_buf)); 2335 if (p6 == NULL) { 2336 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2337 __func__); 2338 return (NULL); 2339 } 2340 sin6 = &remote_store.sin6; 2341 sin6->sin6_family = AF_INET6; 2342 sin6->sin6_len = sizeof(*sin6); 2343 sin6->sin6_port = sh->src_port; 2344 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2345 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2346 zero_address = 1; 2347 break; 2348 } 2349 #endif 2350 #ifdef INET 2351 case SCTP_IPV4_ADDRESS: 2352 { 2353 /* ipv4 address param */ 2354 struct sctp_ipv4addr_param *p4, p4_buf; 2355 2356 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2357 return NULL; 2358 } 2359 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2360 offset + sizeof(struct sctp_asconf_chunk), 2361 &p4_buf.ph, sizeof(p4_buf)); 2362 if (p4 == NULL) { 2363 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2364 __func__); 2365 return (NULL); 2366 } 2367 sin = &remote_store.sin; 2368 sin->sin_family = AF_INET; 2369 sin->sin_len = sizeof(*sin); 2370 sin->sin_port = sh->src_port; 2371 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2372 if (sin->sin_addr.s_addr == INADDR_ANY) 2373 zero_address = 1; 2374 break; 2375 } 2376 #endif 2377 default: 2378 /* invalid address param type */ 2379 return NULL; 2380 } 2381 2382 if (zero_address) { 2383 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2384 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2385 if (stcb != NULL) { 2386 SCTP_INP_DECR_REF(*inp_p); 2387 } 2388 } else { 2389 stcb = sctp_findassociation_ep_addr(inp_p, 2390 &remote_store.sa, netp, 2391 dst, NULL); 2392 } 2393 return (stcb); 2394 } 2395 2396 2397 /* 2398 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2399 * addresses. This way if we don't get a bind we by default pick a ephemeral 2400 * port with all addresses bound. 2401 */ 2402 int 2403 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2404 { 2405 /* 2406 * we get called when a new endpoint starts up. We need to allocate 2407 * the sctp_inpcb structure from the zone and init it. Mark it as 2408 * unbound and find a port that we can use as an ephemeral with 2409 * INADDR_ANY. If the user binds later no problem we can then add in 2410 * the specific addresses. And setup the default parameters for the 2411 * EP. 2412 */ 2413 int i, error; 2414 struct sctp_inpcb *inp; 2415 struct sctp_pcb *m; 2416 struct timeval time; 2417 sctp_sharedkey_t *null_key; 2418 2419 error = 0; 2420 2421 SCTP_INP_INFO_WLOCK(); 2422 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2423 if (inp == NULL) { 2424 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2425 SCTP_INP_INFO_WUNLOCK(); 2426 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2427 return (ENOBUFS); 2428 } 2429 /* zap it */ 2430 memset(inp, 0, sizeof(*inp)); 2431 2432 /* bump generations */ 2433 /* setup socket pointers */ 2434 inp->sctp_socket = so; 2435 inp->ip_inp.inp.inp_socket = so; 2436 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2437 #ifdef INET6 2438 if (INP_SOCKAF(so) == AF_INET6) { 2439 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2440 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2441 } 2442 if (MODULE_GLOBAL(ip6_v6only)) { 2443 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2444 } 2445 } 2446 #endif 2447 inp->sctp_associd_counter = 1; 2448 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2449 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2450 inp->max_cwnd = 0; 2451 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2452 inp->ecn_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_ecn_enable); 2453 inp->prsctp_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pr_enable); 2454 inp->auth_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_auth_enable); 2455 inp->asconf_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_asconf_enable); 2456 inp->reconfig_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2457 inp->nrsack_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2458 inp->pktdrop_supported = (uint8_t)SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2459 inp->idata_supported = 0; 2460 2461 inp->fibnum = so->so_fibnum; 2462 /* init the small hash table we use to track asocid <-> tcb */ 2463 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2464 if (inp->sctp_asocidhash == NULL) { 2465 crfree(inp->ip_inp.inp.inp_cred); 2466 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2467 SCTP_INP_INFO_WUNLOCK(); 2468 return (ENOBUFS); 2469 } 2470 SCTP_INCR_EP_COUNT(); 2471 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2472 SCTP_INP_INFO_WUNLOCK(); 2473 2474 so->so_pcb = (caddr_t)inp; 2475 2476 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2477 /* UDP style socket */ 2478 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2479 SCTP_PCB_FLAGS_UNBOUND); 2480 /* Be sure it is NON-BLOCKING IO for UDP */ 2481 /* SCTP_SET_SO_NBIO(so); */ 2482 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2483 /* TCP style socket */ 2484 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2485 SCTP_PCB_FLAGS_UNBOUND); 2486 /* Be sure we have blocking IO by default */ 2487 SOCK_LOCK(so); 2488 SCTP_CLEAR_SO_NBIO(so); 2489 SOCK_UNLOCK(so); 2490 } else { 2491 /* 2492 * unsupported socket type (RAW, etc)- in case we missed it 2493 * in protosw 2494 */ 2495 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2496 so->so_pcb = NULL; 2497 crfree(inp->ip_inp.inp.inp_cred); 2498 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2499 return (EOPNOTSUPP); 2500 } 2501 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2502 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2503 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2504 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2505 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2506 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2507 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2508 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2509 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2510 } 2511 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2512 &inp->sctp_hashmark); 2513 if (inp->sctp_tcbhash == NULL) { 2514 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2515 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2516 so->so_pcb = NULL; 2517 crfree(inp->ip_inp.inp.inp_cred); 2518 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2519 return (ENOBUFS); 2520 } 2521 inp->def_vrf_id = vrf_id; 2522 2523 SCTP_INP_INFO_WLOCK(); 2524 SCTP_INP_LOCK_INIT(inp); 2525 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2526 SCTP_INP_READ_INIT(inp); 2527 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2528 /* lock the new ep */ 2529 SCTP_INP_WLOCK(inp); 2530 2531 /* add it to the info area */ 2532 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2533 SCTP_INP_INFO_WUNLOCK(); 2534 2535 TAILQ_INIT(&inp->read_queue); 2536 LIST_INIT(&inp->sctp_addr_list); 2537 2538 LIST_INIT(&inp->sctp_asoc_list); 2539 2540 #ifdef SCTP_TRACK_FREED_ASOCS 2541 /* TEMP CODE */ 2542 LIST_INIT(&inp->sctp_asoc_free_list); 2543 #endif 2544 /* Init the timer structure for signature change */ 2545 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2546 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2547 2548 /* now init the actual endpoint default data */ 2549 m = &inp->sctp_ep; 2550 2551 /* setup the base timeout information */ 2552 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2553 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2554 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2555 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2556 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2557 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2558 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2559 /* all max/min max are in ms */ 2560 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2561 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2562 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2563 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2564 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2565 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2566 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2567 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2568 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2569 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2570 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2571 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2572 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2573 2574 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2575 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2576 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2577 /* number of streams to pre-open on a association */ 2578 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2579 2580 m->default_mtu = 0; 2581 /* Add adaptation cookie */ 2582 m->adaptation_layer_indicator = 0; 2583 m->adaptation_layer_indicator_provided = 0; 2584 2585 /* seed random number generator */ 2586 m->random_counter = 1; 2587 m->store_at = SCTP_SIGNATURE_SIZE; 2588 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2589 sctp_fill_random_store(m); 2590 2591 /* Minimum cookie size */ 2592 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2593 sizeof(struct sctp_state_cookie); 2594 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2595 2596 /* Setup the initial secret */ 2597 (void)SCTP_GETTIME_TIMEVAL(&time); 2598 m->time_of_secret_change = time.tv_sec; 2599 2600 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2601 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2602 } 2603 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2604 2605 /* How long is a cookie good for ? */ 2606 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2607 /* 2608 * Initialize authentication parameters 2609 */ 2610 m->local_hmacs = sctp_default_supported_hmaclist(); 2611 m->local_auth_chunks = sctp_alloc_chunklist(); 2612 if (inp->asconf_supported) { 2613 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2614 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2615 } 2616 m->default_dscp = 0; 2617 #ifdef INET6 2618 m->default_flowlabel = 0; 2619 #endif 2620 m->port = 0; /* encapsulation disabled by default */ 2621 LIST_INIT(&m->shared_keys); 2622 /* add default NULL key as key id 0 */ 2623 null_key = sctp_alloc_sharedkey(); 2624 sctp_insert_sharedkey(&m->shared_keys, null_key); 2625 SCTP_INP_WUNLOCK(inp); 2626 #ifdef SCTP_LOG_CLOSING 2627 sctp_log_closing(inp, NULL, 12); 2628 #endif 2629 return (error); 2630 } 2631 2632 2633 void 2634 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2635 struct sctp_tcb *stcb) 2636 { 2637 struct sctp_nets *net; 2638 uint16_t lport, rport; 2639 struct sctppcbhead *head; 2640 struct sctp_laddr *laddr, *oladdr; 2641 2642 atomic_add_int(&stcb->asoc.refcnt, 1); 2643 SCTP_TCB_UNLOCK(stcb); 2644 SCTP_INP_INFO_WLOCK(); 2645 SCTP_INP_WLOCK(old_inp); 2646 SCTP_INP_WLOCK(new_inp); 2647 SCTP_TCB_LOCK(stcb); 2648 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2649 2650 new_inp->sctp_ep.time_of_secret_change = 2651 old_inp->sctp_ep.time_of_secret_change; 2652 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2653 sizeof(old_inp->sctp_ep.secret_key)); 2654 new_inp->sctp_ep.current_secret_number = 2655 old_inp->sctp_ep.current_secret_number; 2656 new_inp->sctp_ep.last_secret_number = 2657 old_inp->sctp_ep.last_secret_number; 2658 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2659 2660 /* make it so new data pours into the new socket */ 2661 stcb->sctp_socket = new_inp->sctp_socket; 2662 stcb->sctp_ep = new_inp; 2663 2664 /* Copy the port across */ 2665 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2666 rport = stcb->rport; 2667 /* Pull the tcb from the old association */ 2668 LIST_REMOVE(stcb, sctp_tcbhash); 2669 LIST_REMOVE(stcb, sctp_tcblist); 2670 if (stcb->asoc.in_asocid_hash) { 2671 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2672 } 2673 /* Now insert the new_inp into the TCP connected hash */ 2674 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2675 2676 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2677 /* Its safe to access */ 2678 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2679 2680 /* Now move the tcb into the endpoint list */ 2681 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2682 /* 2683 * Question, do we even need to worry about the ep-hash since we 2684 * only have one connection? Probably not :> so lets get rid of it 2685 * and not suck up any kernel memory in that. 2686 */ 2687 if (stcb->asoc.in_asocid_hash) { 2688 struct sctpasochead *lhd; 2689 2690 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2691 new_inp->hashasocidmark)]; 2692 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2693 } 2694 /* Ok. Let's restart timer. */ 2695 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2696 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2697 stcb, net); 2698 } 2699 2700 SCTP_INP_INFO_WUNLOCK(); 2701 if (new_inp->sctp_tcbhash != NULL) { 2702 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2703 new_inp->sctp_tcbhash = NULL; 2704 } 2705 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2706 /* Subset bound, so copy in the laddr list from the old_inp */ 2707 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2708 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2709 if (laddr == NULL) { 2710 /* 2711 * Gak, what can we do? This assoc is really 2712 * HOSED. We probably should send an abort 2713 * here. 2714 */ 2715 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2716 continue; 2717 } 2718 SCTP_INCR_LADDR_COUNT(); 2719 memset(laddr, 0, sizeof(*laddr)); 2720 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2721 laddr->ifa = oladdr->ifa; 2722 atomic_add_int(&laddr->ifa->refcount, 1); 2723 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2724 sctp_nxt_addr); 2725 new_inp->laddr_count++; 2726 if (oladdr == stcb->asoc.last_used_address) { 2727 stcb->asoc.last_used_address = laddr; 2728 } 2729 } 2730 } 2731 /* 2732 * Now any running timers need to be adjusted since we really don't 2733 * care if they are running or not just blast in the new_inp into 2734 * all of them. 2735 */ 2736 2737 stcb->asoc.dack_timer.ep = (void *)new_inp; 2738 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2739 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2740 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2741 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2742 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2743 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2744 /* now what about the nets? */ 2745 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2746 net->pmtu_timer.ep = (void *)new_inp; 2747 net->hb_timer.ep = (void *)new_inp; 2748 net->rxt_timer.ep = (void *)new_inp; 2749 } 2750 SCTP_INP_WUNLOCK(new_inp); 2751 SCTP_INP_WUNLOCK(old_inp); 2752 } 2753 2754 /* 2755 * insert an laddr entry with the given ifa for the desired list 2756 */ 2757 static int 2758 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2759 { 2760 struct sctp_laddr *laddr; 2761 2762 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2763 if (laddr == NULL) { 2764 /* out of memory? */ 2765 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2766 return (EINVAL); 2767 } 2768 SCTP_INCR_LADDR_COUNT(); 2769 memset(laddr, 0, sizeof(*laddr)); 2770 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2771 laddr->ifa = ifa; 2772 laddr->action = act; 2773 atomic_add_int(&ifa->refcount, 1); 2774 /* insert it */ 2775 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2776 2777 return (0); 2778 } 2779 2780 /* 2781 * Remove an laddr entry from the local address list (on an assoc) 2782 */ 2783 static void 2784 sctp_remove_laddr(struct sctp_laddr *laddr) 2785 { 2786 2787 /* remove from the list */ 2788 LIST_REMOVE(laddr, sctp_nxt_addr); 2789 sctp_free_ifa(laddr->ifa); 2790 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2791 SCTP_DECR_LADDR_COUNT(); 2792 } 2793 2794 2795 2796 /* sctp_ifap is used to bypass normal local address validation checks */ 2797 int 2798 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2799 struct sctp_ifa *sctp_ifap, struct thread *p) 2800 { 2801 /* bind a ep to a socket address */ 2802 struct sctppcbhead *head; 2803 struct sctp_inpcb *inp, *inp_tmp; 2804 struct inpcb *ip_inp; 2805 int port_reuse_active = 0; 2806 int bindall; 2807 uint16_t lport; 2808 int error; 2809 uint32_t vrf_id; 2810 2811 lport = 0; 2812 bindall = 1; 2813 inp = (struct sctp_inpcb *)so->so_pcb; 2814 ip_inp = (struct inpcb *)so->so_pcb; 2815 #ifdef SCTP_DEBUG 2816 if (addr) { 2817 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2818 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2819 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2820 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2821 } 2822 #endif 2823 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2824 /* already did a bind, subsequent binds NOT allowed ! */ 2825 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2826 return (EINVAL); 2827 } 2828 #ifdef INVARIANTS 2829 if (p == NULL) 2830 panic("null proc/thread"); 2831 #endif 2832 if (addr != NULL) { 2833 switch (addr->sa_family) { 2834 #ifdef INET 2835 case AF_INET: 2836 { 2837 struct sockaddr_in *sin; 2838 2839 /* IPV6_V6ONLY socket? */ 2840 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2841 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2842 return (EINVAL); 2843 } 2844 if (addr->sa_len != sizeof(*sin)) { 2845 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2846 return (EINVAL); 2847 } 2848 sin = (struct sockaddr_in *)addr; 2849 lport = sin->sin_port; 2850 /* 2851 * For LOOPBACK the prison_local_ip4() call 2852 * will transmute the ip address to the 2853 * proper value. 2854 */ 2855 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2856 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2857 return (error); 2858 } 2859 if (sin->sin_addr.s_addr != INADDR_ANY) { 2860 bindall = 0; 2861 } 2862 break; 2863 } 2864 #endif 2865 #ifdef INET6 2866 case AF_INET6: 2867 { 2868 /* 2869 * Only for pure IPv6 Address. (No IPv4 2870 * Mapped!) 2871 */ 2872 struct sockaddr_in6 *sin6; 2873 2874 sin6 = (struct sockaddr_in6 *)addr; 2875 2876 if (addr->sa_len != sizeof(*sin6)) { 2877 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2878 return (EINVAL); 2879 } 2880 lport = sin6->sin6_port; 2881 /* 2882 * For LOOPBACK the prison_local_ip6() call 2883 * will transmute the ipv6 address to the 2884 * proper value. 2885 */ 2886 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2887 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2888 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2889 return (error); 2890 } 2891 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2892 bindall = 0; 2893 /* KAME hack: embed scopeid */ 2894 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2895 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2896 return (EINVAL); 2897 } 2898 } 2899 /* this must be cleared for ifa_ifwithaddr() */ 2900 sin6->sin6_scope_id = 0; 2901 break; 2902 } 2903 #endif 2904 default: 2905 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2906 return (EAFNOSUPPORT); 2907 } 2908 } 2909 SCTP_INP_INFO_WLOCK(); 2910 SCTP_INP_WLOCK(inp); 2911 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2912 vrf_id = inp->def_vrf_id; 2913 2914 /* increase our count due to the unlock we do */ 2915 SCTP_INP_INCR_REF(inp); 2916 if (lport) { 2917 /* 2918 * Did the caller specify a port? if so we must see if an ep 2919 * already has this one bound. 2920 */ 2921 /* got to be root to get at low ports */ 2922 if (ntohs(lport) < IPPORT_RESERVED) { 2923 if ((p != NULL) && ((error = 2924 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2925 ) != 0)) { 2926 SCTP_INP_DECR_REF(inp); 2927 SCTP_INP_WUNLOCK(inp); 2928 SCTP_INP_INFO_WUNLOCK(); 2929 return (error); 2930 } 2931 } 2932 SCTP_INP_WUNLOCK(inp); 2933 if (bindall) { 2934 vrf_id = inp->def_vrf_id; 2935 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2936 if (inp_tmp != NULL) { 2937 /* 2938 * lock guy returned and lower count note 2939 * that we are not bound so inp_tmp should 2940 * NEVER be inp. And it is this inp 2941 * (inp_tmp) that gets the reference bump, 2942 * so we must lower it. 2943 */ 2944 SCTP_INP_DECR_REF(inp_tmp); 2945 /* unlock info */ 2946 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2947 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2948 /* 2949 * Ok, must be one-2-one and 2950 * allowing port re-use 2951 */ 2952 port_reuse_active = 1; 2953 goto continue_anyway; 2954 } 2955 SCTP_INP_DECR_REF(inp); 2956 SCTP_INP_INFO_WUNLOCK(); 2957 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2958 return (EADDRINUSE); 2959 } 2960 } else { 2961 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2962 if (inp_tmp != NULL) { 2963 /* 2964 * lock guy returned and lower count note 2965 * that we are not bound so inp_tmp should 2966 * NEVER be inp. And it is this inp 2967 * (inp_tmp) that gets the reference bump, 2968 * so we must lower it. 2969 */ 2970 SCTP_INP_DECR_REF(inp_tmp); 2971 /* unlock info */ 2972 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2973 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2974 /* 2975 * Ok, must be one-2-one and 2976 * allowing port re-use 2977 */ 2978 port_reuse_active = 1; 2979 goto continue_anyway; 2980 } 2981 SCTP_INP_DECR_REF(inp); 2982 SCTP_INP_INFO_WUNLOCK(); 2983 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2984 return (EADDRINUSE); 2985 } 2986 } 2987 continue_anyway: 2988 SCTP_INP_WLOCK(inp); 2989 if (bindall) { 2990 /* verify that no lport is not used by a singleton */ 2991 if ((port_reuse_active == 0) && 2992 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2993 /* Sorry someone already has this one bound */ 2994 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2995 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2996 port_reuse_active = 1; 2997 } else { 2998 SCTP_INP_DECR_REF(inp); 2999 SCTP_INP_WUNLOCK(inp); 3000 SCTP_INP_INFO_WUNLOCK(); 3001 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3002 return (EADDRINUSE); 3003 } 3004 } 3005 } 3006 } else { 3007 uint16_t first, last, candidate; 3008 uint16_t count; 3009 int done; 3010 3011 if (ip_inp->inp_flags & INP_HIGHPORT) { 3012 first = MODULE_GLOBAL(ipport_hifirstauto); 3013 last = MODULE_GLOBAL(ipport_hilastauto); 3014 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3015 if (p && (error = 3016 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3017 )) { 3018 SCTP_INP_DECR_REF(inp); 3019 SCTP_INP_WUNLOCK(inp); 3020 SCTP_INP_INFO_WUNLOCK(); 3021 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3022 return (error); 3023 } 3024 first = MODULE_GLOBAL(ipport_lowfirstauto); 3025 last = MODULE_GLOBAL(ipport_lowlastauto); 3026 } else { 3027 first = MODULE_GLOBAL(ipport_firstauto); 3028 last = MODULE_GLOBAL(ipport_lastauto); 3029 } 3030 if (first > last) { 3031 uint16_t temp; 3032 3033 temp = first; 3034 first = last; 3035 last = temp; 3036 } 3037 count = last - first + 1; /* number of candidates */ 3038 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3039 3040 done = 0; 3041 while (!done) { 3042 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3043 done = 1; 3044 } 3045 if (!done) { 3046 if (--count == 0) { 3047 SCTP_INP_DECR_REF(inp); 3048 SCTP_INP_WUNLOCK(inp); 3049 SCTP_INP_INFO_WUNLOCK(); 3050 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3051 return (EADDRINUSE); 3052 } 3053 if (candidate == last) 3054 candidate = first; 3055 else 3056 candidate = candidate + 1; 3057 } 3058 } 3059 lport = htons(candidate); 3060 } 3061 SCTP_INP_DECR_REF(inp); 3062 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3063 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3064 /* 3065 * this really should not happen. The guy did a non-blocking 3066 * bind and then did a close at the same time. 3067 */ 3068 SCTP_INP_WUNLOCK(inp); 3069 SCTP_INP_INFO_WUNLOCK(); 3070 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3071 return (EINVAL); 3072 } 3073 /* ok we look clear to give out this port, so lets setup the binding */ 3074 if (bindall) { 3075 /* binding to all addresses, so just set in the proper flags */ 3076 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3077 /* set the automatic addr changes from kernel flag */ 3078 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3079 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3080 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3081 } else { 3082 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3083 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3084 } 3085 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3086 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3087 } else { 3088 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3089 } 3090 /* 3091 * set the automatic mobility_base from kernel flag (by 3092 * micchie) 3093 */ 3094 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3095 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3096 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3097 } else { 3098 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3099 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3100 } 3101 /* 3102 * set the automatic mobility_fasthandoff from kernel flag 3103 * (by micchie) 3104 */ 3105 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3106 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3107 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3108 } else { 3109 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3110 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3111 } 3112 } else { 3113 /* 3114 * bind specific, make sure flags is off and add a new 3115 * address structure to the sctp_addr_list inside the ep 3116 * structure. 3117 * 3118 * We will need to allocate one and insert it at the head. 3119 * The socketopt call can just insert new addresses in there 3120 * as well. It will also have to do the embed scope kame 3121 * hack too (before adding). 3122 */ 3123 struct sctp_ifa *ifa; 3124 union sctp_sockstore store; 3125 3126 memset(&store, 0, sizeof(store)); 3127 switch (addr->sa_family) { 3128 #ifdef INET 3129 case AF_INET: 3130 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3131 store.sin.sin_port = 0; 3132 break; 3133 #endif 3134 #ifdef INET6 3135 case AF_INET6: 3136 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3137 store.sin6.sin6_port = 0; 3138 break; 3139 #endif 3140 default: 3141 break; 3142 } 3143 /* 3144 * first find the interface with the bound address need to 3145 * zero out the port to find the address! yuck! can't do 3146 * this earlier since need port for sctp_pcb_findep() 3147 */ 3148 if (sctp_ifap != NULL) { 3149 ifa = sctp_ifap; 3150 } else { 3151 /* 3152 * Note for BSD we hit here always other O/S's will 3153 * pass things in via the sctp_ifap argument 3154 * (Panda). 3155 */ 3156 ifa = sctp_find_ifa_by_addr(&store.sa, 3157 vrf_id, SCTP_ADDR_NOT_LOCKED); 3158 } 3159 if (ifa == NULL) { 3160 /* Can't find an interface with that address */ 3161 SCTP_INP_WUNLOCK(inp); 3162 SCTP_INP_INFO_WUNLOCK(); 3163 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3164 return (EADDRNOTAVAIL); 3165 } 3166 #ifdef INET6 3167 if (addr->sa_family == AF_INET6) { 3168 /* GAK, more FIXME IFA lock? */ 3169 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3170 /* Can't bind a non-existent addr. */ 3171 SCTP_INP_WUNLOCK(inp); 3172 SCTP_INP_INFO_WUNLOCK(); 3173 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3174 return (EINVAL); 3175 } 3176 } 3177 #endif 3178 /* we're not bound all */ 3179 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3180 /* allow bindx() to send ASCONF's for binding changes */ 3181 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3182 /* clear automatic addr changes from kernel flag */ 3183 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3184 3185 /* add this address to the endpoint list */ 3186 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3187 if (error != 0) { 3188 SCTP_INP_WUNLOCK(inp); 3189 SCTP_INP_INFO_WUNLOCK(); 3190 return (error); 3191 } 3192 inp->laddr_count++; 3193 } 3194 /* find the bucket */ 3195 if (port_reuse_active) { 3196 /* Put it into tcp 1-2-1 hash */ 3197 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3198 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3199 } else { 3200 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3201 } 3202 /* put it in the bucket */ 3203 LIST_INSERT_HEAD(head, inp, sctp_hash); 3204 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3205 (void *)head, ntohs(lport), port_reuse_active); 3206 /* set in the port */ 3207 inp->sctp_lport = lport; 3208 3209 /* turn off just the unbound flag */ 3210 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3211 SCTP_INP_WUNLOCK(inp); 3212 SCTP_INP_INFO_WUNLOCK(); 3213 return (0); 3214 } 3215 3216 3217 static void 3218 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3219 { 3220 struct sctp_iterator *it, *nit; 3221 3222 /* 3223 * We enter with the only the ITERATOR_LOCK in place and a write 3224 * lock on the inp_info stuff. 3225 */ 3226 it = sctp_it_ctl.cur_it; 3227 if (it && (it->vn != curvnet)) { 3228 /* Its not looking at our VNET */ 3229 return; 3230 } 3231 if (it && (it->inp == inp)) { 3232 /* 3233 * This is tricky and we hold the iterator lock, but when it 3234 * returns and gets the lock (when we release it) the 3235 * iterator will try to operate on inp. We need to stop that 3236 * from happening. But of course the iterator has a 3237 * reference on the stcb and inp. We can mark it and it will 3238 * stop. 3239 * 3240 * If its a single iterator situation, we set the end 3241 * iterator flag. Otherwise we set the iterator to go to the 3242 * next inp. 3243 * 3244 */ 3245 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3246 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3247 } else { 3248 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3249 } 3250 } 3251 /* 3252 * Now go through and remove any single reference to our inp that 3253 * may be still pending on the list 3254 */ 3255 SCTP_IPI_ITERATOR_WQ_LOCK(); 3256 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3257 if (it->vn != curvnet) { 3258 continue; 3259 } 3260 if (it->inp == inp) { 3261 /* This one points to me is it inp specific? */ 3262 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3263 /* Remove and free this one */ 3264 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3265 it, sctp_nxt_itr); 3266 if (it->function_atend != NULL) { 3267 (*it->function_atend) (it->pointer, it->val); 3268 } 3269 SCTP_FREE(it, SCTP_M_ITER); 3270 } else { 3271 it->inp = LIST_NEXT(it->inp, sctp_list); 3272 if (it->inp) { 3273 SCTP_INP_INCR_REF(it->inp); 3274 } 3275 } 3276 /* 3277 * When its put in the refcnt is incremented so decr 3278 * it 3279 */ 3280 SCTP_INP_DECR_REF(inp); 3281 } 3282 } 3283 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3284 } 3285 3286 /* release sctp_inpcb unbind the port */ 3287 void 3288 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3289 { 3290 /* 3291 * Here we free a endpoint. We must find it (if it is in the Hash 3292 * table) and remove it from there. Then we must also find it in the 3293 * overall list and remove it from there. After all removals are 3294 * complete then any timer has to be stopped. Then start the actual 3295 * freeing. a) Any local lists. b) Any associations. c) The hash of 3296 * all associations. d) finally the ep itself. 3297 */ 3298 struct sctp_tcb *asoc, *nasoc; 3299 struct sctp_laddr *laddr, *nladdr; 3300 struct inpcb *ip_pcb; 3301 struct socket *so; 3302 int being_refed = 0; 3303 struct sctp_queued_to_read *sq, *nsq; 3304 int cnt; 3305 sctp_sharedkey_t *shared_key, *nshared_key; 3306 3307 3308 #ifdef SCTP_LOG_CLOSING 3309 sctp_log_closing(inp, NULL, 0); 3310 #endif 3311 SCTP_ITERATOR_LOCK(); 3312 /* mark any iterators on the list or being processed */ 3313 sctp_iterator_inp_being_freed(inp); 3314 SCTP_ITERATOR_UNLOCK(); 3315 so = inp->sctp_socket; 3316 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3317 /* been here before.. eeks.. get out of here */ 3318 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3319 #ifdef SCTP_LOG_CLOSING 3320 sctp_log_closing(inp, NULL, 1); 3321 #endif 3322 return; 3323 } 3324 SCTP_ASOC_CREATE_LOCK(inp); 3325 SCTP_INP_INFO_WLOCK(); 3326 3327 SCTP_INP_WLOCK(inp); 3328 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3329 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3330 /* socket is gone, so no more wakeups allowed */ 3331 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3332 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3333 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3334 3335 } 3336 /* First time through we have the socket lock, after that no more. */ 3337 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3338 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3339 3340 if (inp->control) { 3341 sctp_m_freem(inp->control); 3342 inp->control = NULL; 3343 } 3344 if (inp->pkt) { 3345 sctp_m_freem(inp->pkt); 3346 inp->pkt = NULL; 3347 } 3348 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3349 * here but I will be nice :> (i.e. 3350 * ip_pcb = ep;) */ 3351 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3352 int cnt_in_sd; 3353 3354 cnt_in_sd = 0; 3355 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3356 SCTP_TCB_LOCK(asoc); 3357 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3358 /* Skip guys being freed */ 3359 cnt_in_sd++; 3360 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3361 /* 3362 * Special case - we did not start a 3363 * kill timer on the asoc due to it 3364 * was not closed. So go ahead and 3365 * start it now. 3366 */ 3367 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3368 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3369 } 3370 SCTP_TCB_UNLOCK(asoc); 3371 continue; 3372 } 3373 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3374 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3375 (asoc->asoc.total_output_queue_size == 0)) { 3376 /* 3377 * If we have data in queue, we don't want 3378 * to just free since the app may have done, 3379 * send()/close or connect/send/close. And 3380 * it wants the data to get across first. 3381 */ 3382 /* Just abandon things in the front states */ 3383 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3384 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3385 cnt_in_sd++; 3386 } 3387 continue; 3388 } 3389 /* Disconnect the socket please */ 3390 asoc->sctp_socket = NULL; 3391 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3392 if ((asoc->asoc.size_on_reasm_queue > 0) || 3393 (asoc->asoc.control_pdapi) || 3394 (asoc->asoc.size_on_all_streams > 0) || 3395 (so && (so->so_rcv.sb_cc > 0))) { 3396 /* Left with Data unread */ 3397 struct mbuf *op_err; 3398 3399 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3400 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3401 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3402 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3403 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3404 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3405 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3406 } 3407 if (sctp_free_assoc(inp, asoc, 3408 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3409 cnt_in_sd++; 3410 } 3411 continue; 3412 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3413 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3414 (asoc->asoc.stream_queue_cnt == 0)) { 3415 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3416 goto abort_anyway; 3417 } 3418 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3419 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3420 struct sctp_nets *netp; 3421 3422 /* 3423 * there is nothing queued to send, 3424 * so I send shutdown 3425 */ 3426 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3427 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3428 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3429 } 3430 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3431 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3432 sctp_stop_timers_for_shutdown(asoc); 3433 if (asoc->asoc.alternate) { 3434 netp = asoc->asoc.alternate; 3435 } else { 3436 netp = asoc->asoc.primary_destination; 3437 } 3438 sctp_send_shutdown(asoc, netp); 3439 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3440 netp); 3441 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3442 asoc->asoc.primary_destination); 3443 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3444 } 3445 } else { 3446 /* mark into shutdown pending */ 3447 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3448 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3449 asoc->asoc.primary_destination); 3450 if ((*asoc->asoc.ss_functions.sctp_ss_is_user_msgs_incomplete) (asoc, &asoc->asoc)) { 3451 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3452 } 3453 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3454 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3455 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3456 struct mbuf *op_err; 3457 3458 abort_anyway: 3459 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3460 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3461 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3462 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3463 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3464 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3465 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3466 } 3467 if (sctp_free_assoc(inp, asoc, 3468 SCTP_PCBFREE_NOFORCE, 3469 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3470 cnt_in_sd++; 3471 } 3472 continue; 3473 } else { 3474 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3475 } 3476 } 3477 cnt_in_sd++; 3478 SCTP_TCB_UNLOCK(asoc); 3479 } 3480 /* now is there some left in our SHUTDOWN state? */ 3481 if (cnt_in_sd) { 3482 #ifdef SCTP_LOG_CLOSING 3483 sctp_log_closing(inp, NULL, 2); 3484 #endif 3485 inp->sctp_socket = NULL; 3486 SCTP_INP_WUNLOCK(inp); 3487 SCTP_ASOC_CREATE_UNLOCK(inp); 3488 SCTP_INP_INFO_WUNLOCK(); 3489 return; 3490 } 3491 } 3492 inp->sctp_socket = NULL; 3493 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3494 SCTP_PCB_FLAGS_UNBOUND) { 3495 /* 3496 * ok, this guy has been bound. It's port is somewhere in 3497 * the SCTP_BASE_INFO(hash table). Remove it! 3498 */ 3499 LIST_REMOVE(inp, sctp_hash); 3500 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3501 } 3502 /* 3503 * If there is a timer running to kill us, forget it, since it may 3504 * have a contest on the INP lock.. which would cause us to die ... 3505 */ 3506 cnt = 0; 3507 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3508 SCTP_TCB_LOCK(asoc); 3509 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3510 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3511 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3512 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3513 } 3514 cnt++; 3515 SCTP_TCB_UNLOCK(asoc); 3516 continue; 3517 } 3518 /* Free associations that are NOT killing us */ 3519 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3520 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3521 struct mbuf *op_err; 3522 3523 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3524 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3525 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3526 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3527 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3528 cnt++; 3529 SCTP_TCB_UNLOCK(asoc); 3530 continue; 3531 } 3532 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3533 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3534 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3535 } 3536 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3537 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3538 cnt++; 3539 } 3540 } 3541 if (cnt) { 3542 /* Ok we have someone out there that will kill us */ 3543 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3544 #ifdef SCTP_LOG_CLOSING 3545 sctp_log_closing(inp, NULL, 3); 3546 #endif 3547 SCTP_INP_WUNLOCK(inp); 3548 SCTP_ASOC_CREATE_UNLOCK(inp); 3549 SCTP_INP_INFO_WUNLOCK(); 3550 return; 3551 } 3552 if (SCTP_INP_LOCK_CONTENDED(inp)) 3553 being_refed++; 3554 if (SCTP_INP_READ_CONTENDED(inp)) 3555 being_refed++; 3556 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3557 being_refed++; 3558 3559 if ((inp->refcount) || 3560 (being_refed) || 3561 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3562 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3563 #ifdef SCTP_LOG_CLOSING 3564 sctp_log_closing(inp, NULL, 4); 3565 #endif 3566 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3567 SCTP_INP_WUNLOCK(inp); 3568 SCTP_ASOC_CREATE_UNLOCK(inp); 3569 SCTP_INP_INFO_WUNLOCK(); 3570 return; 3571 } 3572 inp->sctp_ep.signature_change.type = 0; 3573 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3574 /* 3575 * Remove it from the list .. last thing we need a lock for. 3576 */ 3577 LIST_REMOVE(inp, sctp_list); 3578 SCTP_INP_WUNLOCK(inp); 3579 SCTP_ASOC_CREATE_UNLOCK(inp); 3580 SCTP_INP_INFO_WUNLOCK(); 3581 /* 3582 * Now we release all locks. Since this INP cannot be found anymore 3583 * except possibly by the kill timer that might be running. We call 3584 * the drain function here. It should hit the case were it sees the 3585 * ACTIVE flag cleared and exit out freeing us to proceed and 3586 * destroy everything. 3587 */ 3588 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3589 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3590 } else { 3591 /* Probably un-needed */ 3592 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3593 } 3594 3595 #ifdef SCTP_LOG_CLOSING 3596 sctp_log_closing(inp, NULL, 5); 3597 #endif 3598 3599 3600 if ((inp->sctp_asocidhash) != NULL) { 3601 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3602 inp->sctp_asocidhash = NULL; 3603 } 3604 /* sa_ignore FREED_MEMORY */ 3605 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3606 /* Its only abandoned if it had data left */ 3607 if (sq->length) 3608 SCTP_STAT_INCR(sctps_left_abandon); 3609 3610 TAILQ_REMOVE(&inp->read_queue, sq, next); 3611 sctp_free_remote_addr(sq->whoFrom); 3612 if (so) 3613 so->so_rcv.sb_cc -= sq->length; 3614 if (sq->data) { 3615 sctp_m_freem(sq->data); 3616 sq->data = NULL; 3617 } 3618 /* 3619 * no need to free the net count, since at this point all 3620 * assoc's are gone. 3621 */ 3622 sctp_free_a_readq(NULL, sq); 3623 } 3624 /* Now the sctp_pcb things */ 3625 /* 3626 * free each asoc if it is not already closed/free. we can't use the 3627 * macro here since le_next will get freed as part of the 3628 * sctp_free_assoc() call. 3629 */ 3630 if (ip_pcb->inp_options) { 3631 (void)sctp_m_free(ip_pcb->inp_options); 3632 ip_pcb->inp_options = 0; 3633 } 3634 #ifdef INET6 3635 if (ip_pcb->inp_vflag & INP_IPV6) { 3636 struct in6pcb *in6p; 3637 3638 in6p = (struct in6pcb *)inp; 3639 ip6_freepcbopts(in6p->in6p_outputopts); 3640 } 3641 #endif /* INET6 */ 3642 ip_pcb->inp_vflag = 0; 3643 /* free up authentication fields */ 3644 if (inp->sctp_ep.local_auth_chunks != NULL) 3645 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3646 if (inp->sctp_ep.local_hmacs != NULL) 3647 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3648 3649 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3650 LIST_REMOVE(shared_key, next); 3651 sctp_free_sharedkey(shared_key); 3652 /* sa_ignore FREED_MEMORY */ 3653 } 3654 3655 /* 3656 * if we have an address list the following will free the list of 3657 * ifaddr's that are set into this ep. Again macro limitations here, 3658 * since the LIST_FOREACH could be a bad idea. 3659 */ 3660 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3661 sctp_remove_laddr(laddr); 3662 } 3663 3664 #ifdef SCTP_TRACK_FREED_ASOCS 3665 /* TEMP CODE */ 3666 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3667 LIST_REMOVE(asoc, sctp_tcblist); 3668 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3669 SCTP_DECR_ASOC_COUNT(); 3670 } 3671 /* *** END TEMP CODE *** */ 3672 #endif 3673 /* Now lets see about freeing the EP hash table. */ 3674 if (inp->sctp_tcbhash != NULL) { 3675 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3676 inp->sctp_tcbhash = NULL; 3677 } 3678 /* Now we must put the ep memory back into the zone pool */ 3679 crfree(inp->ip_inp.inp.inp_cred); 3680 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3681 SCTP_INP_LOCK_DESTROY(inp); 3682 SCTP_INP_READ_DESTROY(inp); 3683 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3684 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3685 SCTP_DECR_EP_COUNT(); 3686 } 3687 3688 3689 struct sctp_nets * 3690 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3691 { 3692 struct sctp_nets *net; 3693 3694 /* locate the address */ 3695 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3696 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3697 return (net); 3698 } 3699 return (NULL); 3700 } 3701 3702 3703 int 3704 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3705 { 3706 struct sctp_ifa *sctp_ifa; 3707 3708 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3709 if (sctp_ifa) { 3710 return (1); 3711 } else { 3712 return (0); 3713 } 3714 } 3715 3716 /* 3717 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3718 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3719 * stats of stuff. 3720 */ 3721 int 3722 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3723 struct sctp_nets **netp, uint16_t port, int set_scope, int from) 3724 { 3725 /* 3726 * The following is redundant to the same lines in the 3727 * sctp_aloc_assoc() but is needed since others call the add address 3728 * function 3729 */ 3730 struct sctp_nets *net, *netfirst; 3731 int addr_inscope; 3732 3733 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3734 from); 3735 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3736 3737 netfirst = sctp_findnet(stcb, newaddr); 3738 if (netfirst) { 3739 /* 3740 * Lie and return ok, we don't want to make the association 3741 * go away for this behavior. It will happen in the TCP 3742 * model in a connected socket. It does not reach the hash 3743 * table until after the association is built so it can't be 3744 * found. Mark as reachable, since the initial creation will 3745 * have been cleared and the NOT_IN_ASSOC flag will have 3746 * been added... and we don't want to end up removing it 3747 * back out. 3748 */ 3749 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3750 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3751 SCTP_ADDR_UNCONFIRMED); 3752 } else { 3753 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3754 } 3755 3756 return (0); 3757 } 3758 addr_inscope = 1; 3759 switch (newaddr->sa_family) { 3760 #ifdef INET 3761 case AF_INET: 3762 { 3763 struct sockaddr_in *sin; 3764 3765 sin = (struct sockaddr_in *)newaddr; 3766 if (sin->sin_addr.s_addr == 0) { 3767 /* Invalid address */ 3768 return (-1); 3769 } 3770 /* zero out the zero area */ 3771 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3772 3773 /* assure len is set */ 3774 sin->sin_len = sizeof(struct sockaddr_in); 3775 if (set_scope) { 3776 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3777 stcb->asoc.scope.ipv4_local_scope = 1; 3778 } 3779 } else { 3780 /* Validate the address is in scope */ 3781 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3782 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3783 addr_inscope = 0; 3784 } 3785 } 3786 break; 3787 } 3788 #endif 3789 #ifdef INET6 3790 case AF_INET6: 3791 { 3792 struct sockaddr_in6 *sin6; 3793 3794 sin6 = (struct sockaddr_in6 *)newaddr; 3795 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3796 /* Invalid address */ 3797 return (-1); 3798 } 3799 /* assure len is set */ 3800 sin6->sin6_len = sizeof(struct sockaddr_in6); 3801 if (set_scope) { 3802 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3803 stcb->asoc.scope.loopback_scope = 1; 3804 stcb->asoc.scope.local_scope = 0; 3805 stcb->asoc.scope.ipv4_local_scope = 1; 3806 stcb->asoc.scope.site_scope = 1; 3807 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3808 /* 3809 * If the new destination is a 3810 * LINK_LOCAL we must have common 3811 * site scope. Don't set the local 3812 * scope since we may not share all 3813 * links, only loopback can do this. 3814 * Links on the local network would 3815 * also be on our private network 3816 * for v4 too. 3817 */ 3818 stcb->asoc.scope.ipv4_local_scope = 1; 3819 stcb->asoc.scope.site_scope = 1; 3820 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3821 /* 3822 * If the new destination is 3823 * SITE_LOCAL then we must have site 3824 * scope in common. 3825 */ 3826 stcb->asoc.scope.site_scope = 1; 3827 } 3828 } else { 3829 /* Validate the address is in scope */ 3830 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3831 (stcb->asoc.scope.loopback_scope == 0)) { 3832 addr_inscope = 0; 3833 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3834 (stcb->asoc.scope.local_scope == 0)) { 3835 addr_inscope = 0; 3836 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3837 (stcb->asoc.scope.site_scope == 0)) { 3838 addr_inscope = 0; 3839 } 3840 } 3841 break; 3842 } 3843 #endif 3844 default: 3845 /* not supported family type */ 3846 return (-1); 3847 } 3848 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3849 if (net == NULL) { 3850 return (-1); 3851 } 3852 SCTP_INCR_RADDR_COUNT(); 3853 memset(net, 0, sizeof(struct sctp_nets)); 3854 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3855 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3856 switch (newaddr->sa_family) { 3857 #ifdef INET 3858 case AF_INET: 3859 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3860 break; 3861 #endif 3862 #ifdef INET6 3863 case AF_INET6: 3864 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3865 break; 3866 #endif 3867 default: 3868 break; 3869 } 3870 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3871 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3872 stcb->asoc.scope.loopback_scope = 1; 3873 stcb->asoc.scope.ipv4_local_scope = 1; 3874 stcb->asoc.scope.local_scope = 0; 3875 stcb->asoc.scope.site_scope = 1; 3876 addr_inscope = 1; 3877 } 3878 net->failure_threshold = stcb->asoc.def_net_failure; 3879 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3880 if (addr_inscope == 0) { 3881 net->dest_state = (SCTP_ADDR_REACHABLE | 3882 SCTP_ADDR_OUT_OF_SCOPE); 3883 } else { 3884 if (from == SCTP_ADDR_IS_CONFIRMED) 3885 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3886 net->dest_state = SCTP_ADDR_REACHABLE; 3887 else 3888 net->dest_state = SCTP_ADDR_REACHABLE | 3889 SCTP_ADDR_UNCONFIRMED; 3890 } 3891 /* 3892 * We set this to 0, the timer code knows that this means its an 3893 * initial value 3894 */ 3895 net->rto_needed = 1; 3896 net->RTO = 0; 3897 net->RTO_measured = 0; 3898 stcb->asoc.numnets++; 3899 net->ref_count = 1; 3900 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3901 net->port = port; 3902 net->dscp = stcb->asoc.default_dscp; 3903 #ifdef INET6 3904 net->flowlabel = stcb->asoc.default_flowlabel; 3905 #endif 3906 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3907 net->dest_state |= SCTP_ADDR_NOHB; 3908 } else { 3909 net->dest_state &= ~SCTP_ADDR_NOHB; 3910 } 3911 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3912 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3913 } else { 3914 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3915 } 3916 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3917 /* Init the timer structure */ 3918 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3919 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3920 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3921 3922 /* Now generate a route for this guy */ 3923 #ifdef INET6 3924 /* KAME hack: embed scopeid */ 3925 if (newaddr->sa_family == AF_INET6) { 3926 struct sockaddr_in6 *sin6; 3927 3928 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3929 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3930 sin6->sin6_scope_id = 0; 3931 } 3932 #endif 3933 SCTP_RTALLOC((sctp_route_t *)&net->ro, 3934 stcb->asoc.vrf_id, 3935 stcb->sctp_ep->fibnum); 3936 3937 net->src_addr_selected = 0; 3938 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3939 /* Get source address */ 3940 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3941 stcb, 3942 (sctp_route_t *)&net->ro, 3943 net, 3944 0, 3945 stcb->asoc.vrf_id); 3946 if (stcb->asoc.default_mtu > 0) { 3947 net->mtu = stcb->asoc.default_mtu; 3948 switch (net->ro._l_addr.sa.sa_family) { 3949 #ifdef INET 3950 case AF_INET: 3951 net->mtu += SCTP_MIN_V4_OVERHEAD; 3952 break; 3953 #endif 3954 #ifdef INET6 3955 case AF_INET6: 3956 net->mtu += SCTP_MIN_OVERHEAD; 3957 break; 3958 #endif 3959 default: 3960 break; 3961 } 3962 #if defined(INET) || defined(INET6) 3963 if (net->port) { 3964 net->mtu += (uint32_t)sizeof(struct udphdr); 3965 } 3966 #endif 3967 } else if (net->ro._s_addr != NULL) { 3968 uint32_t imtu, rmtu, hcmtu; 3969 3970 net->src_addr_selected = 1; 3971 /* Now get the interface MTU */ 3972 if (net->ro._s_addr->ifn_p != NULL) { 3973 imtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3974 } else { 3975 imtu = 0; 3976 } 3977 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3978 hcmtu = sctp_hc_get_mtu(&net->ro._l_addr, stcb->sctp_ep->fibnum); 3979 net->mtu = sctp_min_mtu(hcmtu, rmtu, imtu); 3980 if (rmtu == 0) { 3981 /* 3982 * Start things off to match mtu of 3983 * interface please. 3984 */ 3985 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3986 net->ro.ro_rt, net->mtu); 3987 } 3988 } 3989 } 3990 if (net->mtu == 0) { 3991 if (stcb->asoc.default_mtu > 0) { 3992 net->mtu = stcb->asoc.default_mtu; 3993 switch (net->ro._l_addr.sa.sa_family) { 3994 #ifdef INET 3995 case AF_INET: 3996 net->mtu += SCTP_MIN_V4_OVERHEAD; 3997 break; 3998 #endif 3999 #ifdef INET6 4000 case AF_INET6: 4001 net->mtu += SCTP_MIN_OVERHEAD; 4002 break; 4003 #endif 4004 default: 4005 break; 4006 } 4007 #if defined(INET) || defined(INET6) 4008 if (net->port) { 4009 net->mtu += (uint32_t)sizeof(struct udphdr); 4010 } 4011 #endif 4012 } else { 4013 switch (newaddr->sa_family) { 4014 #ifdef INET 4015 case AF_INET: 4016 net->mtu = SCTP_DEFAULT_MTU; 4017 break; 4018 #endif 4019 #ifdef INET6 4020 case AF_INET6: 4021 net->mtu = 1280; 4022 break; 4023 #endif 4024 default: 4025 break; 4026 } 4027 } 4028 } 4029 #if defined(INET) || defined(INET6) 4030 if (net->port) { 4031 net->mtu -= (uint32_t)sizeof(struct udphdr); 4032 } 4033 #endif 4034 if (from == SCTP_ALLOC_ASOC) { 4035 stcb->asoc.smallest_mtu = net->mtu; 4036 } 4037 if (stcb->asoc.smallest_mtu > net->mtu) { 4038 sctp_pathmtu_adjustment(stcb, net->mtu); 4039 } 4040 #ifdef INET6 4041 if (newaddr->sa_family == AF_INET6) { 4042 struct sockaddr_in6 *sin6; 4043 4044 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4045 (void)sa6_recoverscope(sin6); 4046 } 4047 #endif 4048 4049 /* JRS - Use the congestion control given in the CC module */ 4050 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4051 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4052 4053 /* 4054 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4055 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4056 */ 4057 net->find_pseudo_cumack = 1; 4058 net->find_rtx_pseudo_cumack = 1; 4059 /* Choose an initial flowid. */ 4060 net->flowid = stcb->asoc.my_vtag ^ 4061 ntohs(stcb->rport) ^ 4062 ntohs(stcb->sctp_ep->sctp_lport); 4063 net->flowtype = M_HASHTYPE_OPAQUE_HASH; 4064 if (netp) { 4065 *netp = net; 4066 } 4067 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4068 if (net->ro.ro_rt == NULL) { 4069 /* Since we have no route put it at the back */ 4070 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4071 } else if (netfirst == NULL) { 4072 /* We are the first one in the pool. */ 4073 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4074 } else if (netfirst->ro.ro_rt == NULL) { 4075 /* 4076 * First one has NO route. Place this one ahead of the first 4077 * one. 4078 */ 4079 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4080 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4081 /* 4082 * This one has a different interface than the one at the 4083 * top of the list. Place it ahead. 4084 */ 4085 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4086 } else { 4087 /* 4088 * Ok we have the same interface as the first one. Move 4089 * forward until we find either a) one with a NULL route... 4090 * insert ahead of that b) one with a different ifp.. insert 4091 * after that. c) end of the list.. insert at the tail. 4092 */ 4093 struct sctp_nets *netlook; 4094 4095 do { 4096 netlook = TAILQ_NEXT(netfirst, sctp_next); 4097 if (netlook == NULL) { 4098 /* End of the list */ 4099 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4100 break; 4101 } else if (netlook->ro.ro_rt == NULL) { 4102 /* next one has NO route */ 4103 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4104 break; 4105 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4106 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4107 net, sctp_next); 4108 break; 4109 } 4110 /* Shift forward */ 4111 netfirst = netlook; 4112 } while (netlook != NULL); 4113 } 4114 4115 /* got to have a primary set */ 4116 if (stcb->asoc.primary_destination == 0) { 4117 stcb->asoc.primary_destination = net; 4118 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4119 (net->ro.ro_rt) && 4120 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4121 /* No route to current primary adopt new primary */ 4122 stcb->asoc.primary_destination = net; 4123 } 4124 /* Validate primary is first */ 4125 net = TAILQ_FIRST(&stcb->asoc.nets); 4126 if ((net != stcb->asoc.primary_destination) && 4127 (stcb->asoc.primary_destination)) { 4128 /* 4129 * first one on the list is NOT the primary sctp_cmpaddr() 4130 * is much more efficient if the primary is the first on the 4131 * list, make it so. 4132 */ 4133 TAILQ_REMOVE(&stcb->asoc.nets, 4134 stcb->asoc.primary_destination, sctp_next); 4135 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4136 stcb->asoc.primary_destination, sctp_next); 4137 } 4138 return (0); 4139 } 4140 4141 4142 static uint32_t 4143 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4144 { 4145 uint32_t id; 4146 struct sctpasochead *head; 4147 struct sctp_tcb *lstcb; 4148 4149 SCTP_INP_WLOCK(inp); 4150 try_again: 4151 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4152 /* TSNH */ 4153 SCTP_INP_WUNLOCK(inp); 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 SCTP_INP_WUNLOCK(inp); 4173 return id; 4174 } 4175 4176 /* 4177 * allocate an association and add it to the endpoint. The caller must be 4178 * careful to add all additional addresses once they are know right away or 4179 * else the assoc will be may experience a blackout scenario. 4180 */ 4181 struct sctp_tcb * 4182 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4183 int *error, uint32_t override_tag, uint32_t vrf_id, 4184 uint16_t o_streams, uint16_t port, 4185 struct thread *p 4186 ) 4187 { 4188 /* note the p argument is only valid in unbound sockets */ 4189 4190 struct sctp_tcb *stcb; 4191 struct sctp_association *asoc; 4192 struct sctpasochead *head; 4193 uint16_t rport; 4194 int err; 4195 4196 /* 4197 * Assumption made here: Caller has done a 4198 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4199 * address does not exist already. 4200 */ 4201 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4202 /* Hit max assoc, sorry no more */ 4203 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4204 *error = ENOBUFS; 4205 return (NULL); 4206 } 4207 if (firstaddr == NULL) { 4208 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4209 *error = EINVAL; 4210 return (NULL); 4211 } 4212 SCTP_INP_RLOCK(inp); 4213 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4214 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4215 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4216 /* 4217 * If its in the TCP pool, its NOT allowed to create an 4218 * association. The parent listener needs to call 4219 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4220 * off, or connected one does this.. its an error. 4221 */ 4222 SCTP_INP_RUNLOCK(inp); 4223 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4224 *error = EINVAL; 4225 return (NULL); 4226 } 4227 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4228 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4229 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4230 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4231 SCTP_INP_RUNLOCK(inp); 4232 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4233 *error = EINVAL; 4234 return (NULL); 4235 } 4236 } 4237 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4238 #ifdef SCTP_DEBUG 4239 if (firstaddr) { 4240 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4241 switch (firstaddr->sa_family) { 4242 #ifdef INET 4243 case AF_INET: 4244 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4245 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4246 break; 4247 #endif 4248 #ifdef INET6 4249 case AF_INET6: 4250 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4251 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4252 break; 4253 #endif 4254 default: 4255 break; 4256 } 4257 } else { 4258 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4259 } 4260 #endif /* SCTP_DEBUG */ 4261 switch (firstaddr->sa_family) { 4262 #ifdef INET 4263 case AF_INET: 4264 { 4265 struct sockaddr_in *sin; 4266 4267 sin = (struct sockaddr_in *)firstaddr; 4268 if ((ntohs(sin->sin_port) == 0) || 4269 (sin->sin_addr.s_addr == INADDR_ANY) || 4270 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4271 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4272 /* Invalid address */ 4273 SCTP_INP_RUNLOCK(inp); 4274 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4275 *error = EINVAL; 4276 return (NULL); 4277 } 4278 rport = sin->sin_port; 4279 break; 4280 } 4281 #endif 4282 #ifdef INET6 4283 case AF_INET6: 4284 { 4285 struct sockaddr_in6 *sin6; 4286 4287 sin6 = (struct sockaddr_in6 *)firstaddr; 4288 if ((ntohs(sin6->sin6_port) == 0) || 4289 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4290 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4291 /* Invalid address */ 4292 SCTP_INP_RUNLOCK(inp); 4293 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4294 *error = EINVAL; 4295 return (NULL); 4296 } 4297 rport = sin6->sin6_port; 4298 break; 4299 } 4300 #endif 4301 default: 4302 /* not supported family type */ 4303 SCTP_INP_RUNLOCK(inp); 4304 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4305 *error = EINVAL; 4306 return (NULL); 4307 } 4308 SCTP_INP_RUNLOCK(inp); 4309 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4310 /* 4311 * If you have not performed a bind, then we need to do the 4312 * ephemeral bind for you. 4313 */ 4314 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4315 (struct sockaddr *)NULL, 4316 (struct sctp_ifa *)NULL, 4317 p 4318 ))) { 4319 /* bind error, probably perm */ 4320 *error = err; 4321 return (NULL); 4322 } 4323 } 4324 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4325 if (stcb == NULL) { 4326 /* out of memory? */ 4327 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4328 *error = ENOMEM; 4329 return (NULL); 4330 } 4331 SCTP_INCR_ASOC_COUNT(); 4332 4333 memset(stcb, 0, sizeof(*stcb)); 4334 asoc = &stcb->asoc; 4335 4336 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4337 SCTP_TCB_LOCK_INIT(stcb); 4338 SCTP_TCB_SEND_LOCK_INIT(stcb); 4339 stcb->rport = rport; 4340 /* setup back pointer's */ 4341 stcb->sctp_ep = inp; 4342 stcb->sctp_socket = inp->sctp_socket; 4343 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4344 /* failed */ 4345 SCTP_TCB_LOCK_DESTROY(stcb); 4346 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4347 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4348 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4349 SCTP_DECR_ASOC_COUNT(); 4350 *error = err; 4351 return (NULL); 4352 } 4353 /* and the port */ 4354 SCTP_INP_INFO_WLOCK(); 4355 SCTP_INP_WLOCK(inp); 4356 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4357 /* inpcb freed while alloc going on */ 4358 SCTP_TCB_LOCK_DESTROY(stcb); 4359 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4360 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4361 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4362 SCTP_INP_WUNLOCK(inp); 4363 SCTP_INP_INFO_WUNLOCK(); 4364 SCTP_DECR_ASOC_COUNT(); 4365 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4366 *error = EINVAL; 4367 return (NULL); 4368 } 4369 SCTP_TCB_LOCK(stcb); 4370 4371 /* now that my_vtag is set, add it to the hash */ 4372 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4373 /* put it in the bucket in the vtag hash of assoc's for the system */ 4374 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4375 SCTP_INP_INFO_WUNLOCK(); 4376 4377 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, port, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4378 /* failure.. memory error? */ 4379 if (asoc->strmout) { 4380 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4381 asoc->strmout = NULL; 4382 } 4383 if (asoc->mapping_array) { 4384 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4385 asoc->mapping_array = NULL; 4386 } 4387 if (asoc->nr_mapping_array) { 4388 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4389 asoc->nr_mapping_array = NULL; 4390 } 4391 SCTP_DECR_ASOC_COUNT(); 4392 SCTP_TCB_UNLOCK(stcb); 4393 SCTP_TCB_LOCK_DESTROY(stcb); 4394 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4395 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4396 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4397 SCTP_INP_WUNLOCK(inp); 4398 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4399 *error = ENOBUFS; 4400 return (NULL); 4401 } 4402 /* Init all the timers */ 4403 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4404 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4405 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4406 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4407 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4408 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4409 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4410 4411 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4412 /* now file the port under the hash as well */ 4413 if (inp->sctp_tcbhash != NULL) { 4414 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4415 inp->sctp_hashmark)]; 4416 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4417 } 4418 SCTP_INP_WUNLOCK(inp); 4419 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4420 return (stcb); 4421 } 4422 4423 4424 void 4425 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4426 { 4427 struct sctp_association *asoc; 4428 4429 asoc = &stcb->asoc; 4430 asoc->numnets--; 4431 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4432 if (net == asoc->primary_destination) { 4433 /* Reset primary */ 4434 struct sctp_nets *lnet; 4435 4436 lnet = TAILQ_FIRST(&asoc->nets); 4437 /* 4438 * Mobility adaptation Ideally, if deleted destination is 4439 * the primary, it becomes a fast retransmission trigger by 4440 * the subsequent SET PRIMARY. (by micchie) 4441 */ 4442 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4443 SCTP_MOBILITY_BASE) || 4444 sctp_is_mobility_feature_on(stcb->sctp_ep, 4445 SCTP_MOBILITY_FASTHANDOFF)) { 4446 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4447 if (asoc->deleted_primary != NULL) { 4448 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4449 goto out; 4450 } 4451 asoc->deleted_primary = net; 4452 atomic_add_int(&net->ref_count, 1); 4453 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4454 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4455 sctp_mobility_feature_on(stcb->sctp_ep, 4456 SCTP_MOBILITY_PRIM_DELETED); 4457 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4458 stcb->sctp_ep, stcb, NULL); 4459 } 4460 out: 4461 /* Try to find a confirmed primary */ 4462 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4463 } 4464 if (net == asoc->last_data_chunk_from) { 4465 /* Reset primary */ 4466 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4467 } 4468 if (net == asoc->last_control_chunk_from) { 4469 /* Clear net */ 4470 asoc->last_control_chunk_from = NULL; 4471 } 4472 if (net == stcb->asoc.alternate) { 4473 sctp_free_remote_addr(stcb->asoc.alternate); 4474 stcb->asoc.alternate = NULL; 4475 } 4476 sctp_free_remote_addr(net); 4477 } 4478 4479 /* 4480 * remove a remote endpoint address from an association, it will fail if the 4481 * address does not exist. 4482 */ 4483 int 4484 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4485 { 4486 /* 4487 * Here we need to remove a remote address. This is quite simple, we 4488 * first find it in the list of address for the association 4489 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4490 * on that item. Note we do not allow it to be removed if there are 4491 * no other addresses. 4492 */ 4493 struct sctp_association *asoc; 4494 struct sctp_nets *net, *nnet; 4495 4496 asoc = &stcb->asoc; 4497 4498 /* locate the address */ 4499 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4500 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4501 continue; 4502 } 4503 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4504 remaddr)) { 4505 /* we found the guy */ 4506 if (asoc->numnets < 2) { 4507 /* Must have at LEAST two remote addresses */ 4508 return (-1); 4509 } else { 4510 sctp_remove_net(stcb, net); 4511 return (0); 4512 } 4513 } 4514 } 4515 /* not found. */ 4516 return (-2); 4517 } 4518 4519 void 4520 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4521 { 4522 struct sctpvtaghead *chain; 4523 struct sctp_tagblock *twait_block; 4524 int found = 0; 4525 int i; 4526 4527 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4528 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4529 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4530 if ((twait_block->vtag_block[i].v_tag == tag) && 4531 (twait_block->vtag_block[i].lport == lport) && 4532 (twait_block->vtag_block[i].rport == rport)) { 4533 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4534 twait_block->vtag_block[i].v_tag = 0; 4535 twait_block->vtag_block[i].lport = 0; 4536 twait_block->vtag_block[i].rport = 0; 4537 found = 1; 4538 break; 4539 } 4540 } 4541 if (found) 4542 break; 4543 } 4544 } 4545 4546 int 4547 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4548 { 4549 struct sctpvtaghead *chain; 4550 struct sctp_tagblock *twait_block; 4551 int found = 0; 4552 int i; 4553 4554 SCTP_INP_INFO_WLOCK(); 4555 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4556 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4557 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4558 if ((twait_block->vtag_block[i].v_tag == tag) && 4559 (twait_block->vtag_block[i].lport == lport) && 4560 (twait_block->vtag_block[i].rport == rport)) { 4561 found = 1; 4562 break; 4563 } 4564 } 4565 if (found) 4566 break; 4567 } 4568 SCTP_INP_INFO_WUNLOCK(); 4569 return (found); 4570 } 4571 4572 4573 void 4574 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4575 { 4576 struct sctpvtaghead *chain; 4577 struct sctp_tagblock *twait_block; 4578 struct timeval now; 4579 int set, i; 4580 4581 if (time == 0) { 4582 /* Its disabled */ 4583 return; 4584 } 4585 (void)SCTP_GETTIME_TIMEVAL(&now); 4586 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4587 set = 0; 4588 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4589 /* Block(s) present, lets find space, and expire on the fly */ 4590 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4591 if ((twait_block->vtag_block[i].v_tag == 0) && 4592 !set) { 4593 twait_block->vtag_block[i].tv_sec_at_expire = 4594 now.tv_sec + time; 4595 twait_block->vtag_block[i].v_tag = tag; 4596 twait_block->vtag_block[i].lport = lport; 4597 twait_block->vtag_block[i].rport = rport; 4598 set = 1; 4599 } else if ((twait_block->vtag_block[i].v_tag) && 4600 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4601 /* Audit expires this guy */ 4602 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4603 twait_block->vtag_block[i].v_tag = 0; 4604 twait_block->vtag_block[i].lport = 0; 4605 twait_block->vtag_block[i].rport = 0; 4606 if (set == 0) { 4607 /* Reuse it for my new tag */ 4608 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4609 twait_block->vtag_block[i].v_tag = tag; 4610 twait_block->vtag_block[i].lport = lport; 4611 twait_block->vtag_block[i].rport = rport; 4612 set = 1; 4613 } 4614 } 4615 } 4616 if (set) { 4617 /* 4618 * We only do up to the block where we can place our 4619 * tag for audits 4620 */ 4621 break; 4622 } 4623 } 4624 /* Need to add a new block to chain */ 4625 if (!set) { 4626 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4627 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4628 if (twait_block == NULL) { 4629 #ifdef INVARIANTS 4630 panic("Can not alloc tagblock"); 4631 #endif 4632 return; 4633 } 4634 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4635 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4636 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4637 twait_block->vtag_block[0].v_tag = tag; 4638 twait_block->vtag_block[0].lport = lport; 4639 twait_block->vtag_block[0].rport = rport; 4640 } 4641 } 4642 4643 void 4644 sctp_clean_up_stream(struct sctp_tcb *stcb, struct sctp_readhead *rh) 4645 { 4646 struct sctp_tmit_chunk *chk, *nchk; 4647 struct sctp_queued_to_read *control, *ncontrol; 4648 4649 TAILQ_FOREACH_SAFE(control, rh, next_instrm, ncontrol) { 4650 TAILQ_REMOVE(rh, control, next_instrm); 4651 control->on_strm_q = 0; 4652 if (control->on_read_q == 0) { 4653 sctp_free_remote_addr(control->whoFrom); 4654 if (control->data) { 4655 sctp_m_freem(control->data); 4656 control->data = NULL; 4657 } 4658 } 4659 /* Reassembly free? */ 4660 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 4661 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 4662 if (chk->data) { 4663 sctp_m_freem(chk->data); 4664 chk->data = NULL; 4665 } 4666 if (chk->holds_key_ref) 4667 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4668 sctp_free_remote_addr(chk->whoTo); 4669 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4670 SCTP_DECR_CHK_COUNT(); 4671 /* sa_ignore FREED_MEMORY */ 4672 } 4673 /* 4674 * We don't free the address here since all the net's were 4675 * freed above. 4676 */ 4677 if (control->on_read_q == 0) { 4678 sctp_free_a_readq(stcb, control); 4679 } 4680 } 4681 } 4682 4683 4684 /*- 4685 * Free the association after un-hashing the remote port. This 4686 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4687 * expect that the input to this function IS a locked TCB. 4688 * It will return 0, if it did NOT destroy the association (instead 4689 * it unlocks it. It will return NON-zero if it either destroyed the 4690 * association OR the association is already destroyed. 4691 */ 4692 int 4693 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4694 { 4695 int i; 4696 struct sctp_association *asoc; 4697 struct sctp_nets *net, *nnet; 4698 struct sctp_laddr *laddr, *naddr; 4699 struct sctp_tmit_chunk *chk, *nchk; 4700 struct sctp_asconf_addr *aparam, *naparam; 4701 struct sctp_asconf_ack *aack, *naack; 4702 struct sctp_stream_reset_list *strrst, *nstrrst; 4703 struct sctp_queued_to_read *sq, *nsq; 4704 struct sctp_stream_queue_pending *sp, *nsp; 4705 sctp_sharedkey_t *shared_key, *nshared_key; 4706 struct socket *so; 4707 4708 /* first, lets purge the entry from the hash table. */ 4709 4710 #ifdef SCTP_LOG_CLOSING 4711 sctp_log_closing(inp, stcb, 6); 4712 #endif 4713 if (stcb->asoc.state == 0) { 4714 #ifdef SCTP_LOG_CLOSING 4715 sctp_log_closing(inp, NULL, 7); 4716 #endif 4717 /* there is no asoc, really TSNH :-0 */ 4718 return (1); 4719 } 4720 if (stcb->asoc.alternate) { 4721 sctp_free_remote_addr(stcb->asoc.alternate); 4722 stcb->asoc.alternate = NULL; 4723 } 4724 /* TEMP CODE */ 4725 if (stcb->freed_from_where == 0) { 4726 /* Only record the first place free happened from */ 4727 stcb->freed_from_where = from_location; 4728 } 4729 /* TEMP CODE */ 4730 4731 asoc = &stcb->asoc; 4732 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4733 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4734 /* nothing around */ 4735 so = NULL; 4736 else 4737 so = inp->sctp_socket; 4738 4739 /* 4740 * We used timer based freeing if a reader or writer is in the way. 4741 * So we first check if we are actually being called from a timer, 4742 * if so we abort early if a reader or writer is still in the way. 4743 */ 4744 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4745 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4746 /* 4747 * is it the timer driving us? if so are the reader/writers 4748 * gone? 4749 */ 4750 if (stcb->asoc.refcnt) { 4751 /* nope, reader or writer in the way */ 4752 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4753 /* no asoc destroyed */ 4754 SCTP_TCB_UNLOCK(stcb); 4755 #ifdef SCTP_LOG_CLOSING 4756 sctp_log_closing(inp, stcb, 8); 4757 #endif 4758 return (0); 4759 } 4760 } 4761 /* now clean up any other timers */ 4762 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4763 asoc->dack_timer.self = NULL; 4764 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4765 /*- 4766 * For stream reset we don't blast this unless 4767 * it is a str-reset timer, it might be the 4768 * free-asoc timer which we DON'T want to 4769 * disturb. 4770 */ 4771 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4772 asoc->strreset_timer.self = NULL; 4773 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4774 asoc->asconf_timer.self = NULL; 4775 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4776 asoc->autoclose_timer.self = NULL; 4777 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4778 asoc->shut_guard_timer.self = NULL; 4779 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4780 asoc->delayed_event_timer.self = NULL; 4781 /* Mobility adaptation */ 4782 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4783 asoc->delete_prim_timer.self = NULL; 4784 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4785 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4786 net->rxt_timer.self = NULL; 4787 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4788 net->pmtu_timer.self = NULL; 4789 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4790 net->hb_timer.self = NULL; 4791 } 4792 /* Now the read queue needs to be cleaned up (only once) */ 4793 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4794 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4795 SCTP_INP_READ_LOCK(inp); 4796 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4797 if (sq->stcb == stcb) { 4798 sq->do_not_ref_stcb = 1; 4799 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4800 /* 4801 * If there is no end, there never will be 4802 * now. 4803 */ 4804 if (sq->end_added == 0) { 4805 /* Held for PD-API clear that. */ 4806 sq->pdapi_aborted = 1; 4807 sq->held_length = 0; 4808 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4809 /* 4810 * Need to add a PD-API 4811 * aborted indication. 4812 * Setting the control_pdapi 4813 * assures that it will be 4814 * added right after this 4815 * msg. 4816 */ 4817 uint32_t strseq; 4818 4819 stcb->asoc.control_pdapi = sq; 4820 strseq = (sq->sinfo_stream << 16) | (sq->mid & 0x0000ffff); 4821 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4822 stcb, 4823 SCTP_PARTIAL_DELIVERY_ABORTED, 4824 (void *)&strseq, 4825 SCTP_SO_LOCKED); 4826 stcb->asoc.control_pdapi = NULL; 4827 } 4828 } 4829 /* Add an end to wake them */ 4830 sq->end_added = 1; 4831 } 4832 } 4833 SCTP_INP_READ_UNLOCK(inp); 4834 if (stcb->block_entry) { 4835 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4836 stcb->block_entry->error = ECONNRESET; 4837 stcb->block_entry = NULL; 4838 } 4839 } 4840 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4841 /* 4842 * Someone holds a reference OR the socket is unaccepted 4843 * yet. 4844 */ 4845 if ((stcb->asoc.refcnt) || 4846 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4847 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4848 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4849 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4850 } 4851 SCTP_TCB_UNLOCK(stcb); 4852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4853 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4854 /* nothing around */ 4855 so = NULL; 4856 if (so) { 4857 /* Wake any reader/writers */ 4858 sctp_sorwakeup(inp, so); 4859 sctp_sowwakeup(inp, so); 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 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4895 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4896 /* 4897 * For TCP type we need special handling when we are 4898 * connected. We also include the peel'ed off ones to. 4899 */ 4900 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4901 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4902 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4903 if (so) { 4904 SOCKBUF_LOCK(&so->so_rcv); 4905 if (so->so_rcv.sb_cc == 0) { 4906 so->so_state &= ~(SS_ISCONNECTING | 4907 SS_ISDISCONNECTING | 4908 SS_ISCONFIRMING | 4909 SS_ISCONNECTED); 4910 } 4911 socantrcvmore_locked(so); 4912 socantsendmore(so); 4913 sctp_sowwakeup(inp, so); 4914 sctp_sorwakeup(inp, so); 4915 SCTP_SOWAKEUP(so); 4916 } 4917 } 4918 } 4919 /* 4920 * Make it invalid too, that way if its about to run it will abort 4921 * and return. 4922 */ 4923 /* re-increment the lock */ 4924 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4925 atomic_add_int(&stcb->asoc.refcnt, -1); 4926 } 4927 if (stcb->asoc.refcnt) { 4928 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4929 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4930 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4931 SCTP_INP_INFO_WUNLOCK(); 4932 SCTP_INP_WUNLOCK(inp); 4933 } 4934 SCTP_TCB_UNLOCK(stcb); 4935 return (0); 4936 } 4937 asoc->state = 0; 4938 if (inp->sctp_tcbhash) { 4939 LIST_REMOVE(stcb, sctp_tcbhash); 4940 } 4941 if (stcb->asoc.in_asocid_hash) { 4942 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4943 } 4944 /* Now lets remove it from the list of ALL associations in the EP */ 4945 LIST_REMOVE(stcb, sctp_tcblist); 4946 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4947 SCTP_INP_INCR_REF(inp); 4948 SCTP_INP_WUNLOCK(inp); 4949 } 4950 /* pull from vtag hash */ 4951 LIST_REMOVE(stcb, sctp_asocs); 4952 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4953 inp->sctp_lport, stcb->rport); 4954 4955 /* 4956 * Now restop the timers to be sure this is paranoia at is finest! 4957 */ 4958 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4959 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4960 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4961 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4962 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4963 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4964 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4965 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4966 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4967 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4968 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4969 } 4970 4971 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4972 /* 4973 * The chunk lists and such SHOULD be empty but we check them just 4974 * in case. 4975 */ 4976 /* anything on the wheel needs to be removed */ 4977 for (i = 0; i < asoc->streamoutcnt; i++) { 4978 struct sctp_stream_out *outs; 4979 4980 outs = &asoc->strmout[i]; 4981 /* now clean up any chunks here */ 4982 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4983 atomic_subtract_int(&asoc->stream_queue_cnt, 1); 4984 TAILQ_REMOVE(&outs->outqueue, sp, next); 4985 stcb->asoc.ss_functions.sctp_ss_remove_from_stream(stcb, asoc, outs, sp, 0); 4986 sctp_free_spbufspace(stcb, asoc, sp); 4987 if (sp->data) { 4988 if (so) { 4989 /* Still an open socket - report */ 4990 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4991 0, (void *)sp, SCTP_SO_LOCKED); 4992 } 4993 if (sp->data) { 4994 sctp_m_freem(sp->data); 4995 sp->data = NULL; 4996 sp->tail_mbuf = NULL; 4997 sp->length = 0; 4998 } 4999 } 5000 if (sp->net) { 5001 sctp_free_remote_addr(sp->net); 5002 sp->net = NULL; 5003 } 5004 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 5005 } 5006 } 5007 /* sa_ignore FREED_MEMORY */ 5008 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 5009 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 5010 SCTP_FREE(strrst, SCTP_M_STRESET); 5011 } 5012 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 5013 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 5014 if (sq->data) { 5015 sctp_m_freem(sq->data); 5016 sq->data = NULL; 5017 } 5018 sctp_free_remote_addr(sq->whoFrom); 5019 sq->whoFrom = NULL; 5020 sq->stcb = NULL; 5021 /* Free the ctl entry */ 5022 sctp_free_a_readq(stcb, sq); 5023 /* sa_ignore FREED_MEMORY */ 5024 } 5025 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 5026 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5027 if (chk->data) { 5028 sctp_m_freem(chk->data); 5029 chk->data = NULL; 5030 } 5031 if (chk->holds_key_ref) 5032 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5033 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5034 SCTP_DECR_CHK_COUNT(); 5035 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5036 asoc->free_chunk_cnt--; 5037 /* sa_ignore FREED_MEMORY */ 5038 } 5039 /* pending send queue SHOULD be empty */ 5040 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5041 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5042 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5043 #ifdef INVARIANTS 5044 } else { 5045 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5046 #endif 5047 } 5048 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5049 if (chk->data) { 5050 if (so) { 5051 /* Still a socket? */ 5052 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5053 0, chk, SCTP_SO_LOCKED); 5054 } 5055 if (chk->data) { 5056 sctp_m_freem(chk->data); 5057 chk->data = NULL; 5058 } 5059 } 5060 if (chk->holds_key_ref) 5061 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5062 if (chk->whoTo) { 5063 sctp_free_remote_addr(chk->whoTo); 5064 chk->whoTo = NULL; 5065 } 5066 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5067 SCTP_DECR_CHK_COUNT(); 5068 /* sa_ignore FREED_MEMORY */ 5069 } 5070 /* sent queue SHOULD be empty */ 5071 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5072 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5073 if (asoc->strmout[chk->rec.data.sid].chunks_on_queues > 0) { 5074 asoc->strmout[chk->rec.data.sid].chunks_on_queues--; 5075 #ifdef INVARIANTS 5076 } else { 5077 panic("No chunks on the queues for sid %u.", chk->rec.data.sid); 5078 #endif 5079 } 5080 } 5081 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5082 if (chk->data) { 5083 if (so) { 5084 /* Still a socket? */ 5085 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5086 0, chk, SCTP_SO_LOCKED); 5087 } 5088 if (chk->data) { 5089 sctp_m_freem(chk->data); 5090 chk->data = NULL; 5091 } 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 #ifdef INVARIANTS 5101 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5102 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5103 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5104 } 5105 } 5106 #endif 5107 /* control queue MAY not be empty */ 5108 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5109 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5110 if (chk->data) { 5111 sctp_m_freem(chk->data); 5112 chk->data = NULL; 5113 } 5114 if (chk->holds_key_ref) 5115 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5116 sctp_free_remote_addr(chk->whoTo); 5117 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5118 SCTP_DECR_CHK_COUNT(); 5119 /* sa_ignore FREED_MEMORY */ 5120 } 5121 /* ASCONF queue MAY not be empty */ 5122 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5123 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5124 if (chk->data) { 5125 sctp_m_freem(chk->data); 5126 chk->data = NULL; 5127 } 5128 if (chk->holds_key_ref) 5129 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5130 sctp_free_remote_addr(chk->whoTo); 5131 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5132 SCTP_DECR_CHK_COUNT(); 5133 /* sa_ignore FREED_MEMORY */ 5134 } 5135 if (asoc->mapping_array) { 5136 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5137 asoc->mapping_array = NULL; 5138 } 5139 if (asoc->nr_mapping_array) { 5140 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5141 asoc->nr_mapping_array = NULL; 5142 } 5143 /* the stream outs */ 5144 if (asoc->strmout) { 5145 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5146 asoc->strmout = NULL; 5147 } 5148 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5149 if (asoc->strmin) { 5150 for (i = 0; i < asoc->streamincnt; i++) { 5151 sctp_clean_up_stream(stcb, &asoc->strmin[i].inqueue); 5152 sctp_clean_up_stream(stcb, &asoc->strmin[i].uno_inqueue); 5153 } 5154 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5155 asoc->strmin = NULL; 5156 } 5157 asoc->streamincnt = 0; 5158 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5159 #ifdef INVARIANTS 5160 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5161 panic("no net's left alloc'ed, or list points to itself"); 5162 } 5163 #endif 5164 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5165 sctp_free_remote_addr(net); 5166 } 5167 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5168 /* sa_ignore FREED_MEMORY */ 5169 sctp_remove_laddr(laddr); 5170 } 5171 5172 /* pending asconf (address) parameters */ 5173 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5174 /* sa_ignore FREED_MEMORY */ 5175 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5176 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5177 } 5178 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5179 /* sa_ignore FREED_MEMORY */ 5180 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5181 if (aack->data != NULL) { 5182 sctp_m_freem(aack->data); 5183 } 5184 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5185 } 5186 /* clean up auth stuff */ 5187 if (asoc->local_hmacs) 5188 sctp_free_hmaclist(asoc->local_hmacs); 5189 if (asoc->peer_hmacs) 5190 sctp_free_hmaclist(asoc->peer_hmacs); 5191 5192 if (asoc->local_auth_chunks) 5193 sctp_free_chunklist(asoc->local_auth_chunks); 5194 if (asoc->peer_auth_chunks) 5195 sctp_free_chunklist(asoc->peer_auth_chunks); 5196 5197 sctp_free_authinfo(&asoc->authinfo); 5198 5199 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5200 LIST_REMOVE(shared_key, next); 5201 sctp_free_sharedkey(shared_key); 5202 /* sa_ignore FREED_MEMORY */ 5203 } 5204 5205 /* Insert new items here :> */ 5206 5207 /* Get rid of LOCK */ 5208 SCTP_TCB_UNLOCK(stcb); 5209 SCTP_TCB_LOCK_DESTROY(stcb); 5210 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5211 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5212 SCTP_INP_INFO_WUNLOCK(); 5213 SCTP_INP_RLOCK(inp); 5214 } 5215 #ifdef SCTP_TRACK_FREED_ASOCS 5216 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5217 /* now clean up the tasoc itself */ 5218 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5219 SCTP_DECR_ASOC_COUNT(); 5220 } else { 5221 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5222 } 5223 #else 5224 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5225 SCTP_DECR_ASOC_COUNT(); 5226 #endif 5227 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5228 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5229 /* 5230 * If its NOT the inp_free calling us AND sctp_close 5231 * as been called, we call back... 5232 */ 5233 SCTP_INP_RUNLOCK(inp); 5234 /* 5235 * This will start the kill timer (if we are the 5236 * last one) since we hold an increment yet. But 5237 * this is the only safe way to do this since 5238 * otherwise if the socket closes at the same time 5239 * we are here we might collide in the cleanup. 5240 */ 5241 sctp_inpcb_free(inp, 5242 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5243 SCTP_CALLED_DIRECTLY_NOCMPSET); 5244 SCTP_INP_DECR_REF(inp); 5245 goto out_of; 5246 } else { 5247 /* The socket is still open. */ 5248 SCTP_INP_DECR_REF(inp); 5249 } 5250 } 5251 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5252 SCTP_INP_RUNLOCK(inp); 5253 } 5254 out_of: 5255 /* destroyed the asoc */ 5256 #ifdef SCTP_LOG_CLOSING 5257 sctp_log_closing(inp, NULL, 11); 5258 #endif 5259 return (1); 5260 } 5261 5262 5263 5264 /* 5265 * determine if a destination is "reachable" based upon the addresses bound 5266 * to the current endpoint (e.g. only v4 or v6 currently bound) 5267 */ 5268 /* 5269 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5270 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5271 * types bound as its endpoint 5272 */ 5273 int 5274 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5275 { 5276 struct sctp_inpcb *inp; 5277 int answer; 5278 5279 /* 5280 * No locks here, the TCB, in all cases is already locked and an 5281 * assoc is up. There is either a INP lock by the caller applied (in 5282 * asconf case when deleting an address) or NOT in the HB case, 5283 * however if HB then the INP increment is up and the INP will not 5284 * be removed (on top of the fact that we have a TCB lock). So we 5285 * only want to read the sctp_flags, which is either bound-all or 5286 * not.. no protection needed since once an assoc is up you can't be 5287 * changing your binding. 5288 */ 5289 inp = stcb->sctp_ep; 5290 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5291 /* if bound all, destination is not restricted */ 5292 /* 5293 * RRS: Question during lock work: Is this correct? If you 5294 * are bound-all you still might need to obey the V4--V6 5295 * flags??? IMO this bound-all stuff needs to be removed! 5296 */ 5297 return (1); 5298 } 5299 /* NOTE: all "scope" checks are done when local addresses are added */ 5300 switch (destaddr->sa_family) { 5301 #ifdef INET6 5302 case AF_INET6: 5303 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5304 break; 5305 #endif 5306 #ifdef INET 5307 case AF_INET: 5308 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5309 break; 5310 #endif 5311 default: 5312 /* invalid family, so it's unreachable */ 5313 answer = 0; 5314 break; 5315 } 5316 return (answer); 5317 } 5318 5319 /* 5320 * update the inp_vflags on an endpoint 5321 */ 5322 static void 5323 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5324 { 5325 struct sctp_laddr *laddr; 5326 5327 /* first clear the flag */ 5328 inp->ip_inp.inp.inp_vflag = 0; 5329 /* set the flag based on addresses on the ep list */ 5330 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5331 if (laddr->ifa == NULL) { 5332 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5333 __func__); 5334 continue; 5335 } 5336 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5337 continue; 5338 } 5339 switch (laddr->ifa->address.sa.sa_family) { 5340 #ifdef INET6 5341 case AF_INET6: 5342 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5343 break; 5344 #endif 5345 #ifdef INET 5346 case AF_INET: 5347 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5348 break; 5349 #endif 5350 default: 5351 break; 5352 } 5353 } 5354 } 5355 5356 /* 5357 * Add the address to the endpoint local address list There is nothing to be 5358 * done if we are bound to all addresses 5359 */ 5360 void 5361 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5362 { 5363 struct sctp_laddr *laddr; 5364 struct sctp_tcb *stcb; 5365 int fnd, error = 0; 5366 5367 fnd = 0; 5368 5369 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5370 /* You are already bound to all. You have it already */ 5371 return; 5372 } 5373 #ifdef INET6 5374 if (ifa->address.sa.sa_family == AF_INET6) { 5375 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5376 /* Can't bind a non-useable addr. */ 5377 return; 5378 } 5379 } 5380 #endif 5381 /* first, is it already present? */ 5382 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5383 if (laddr->ifa == ifa) { 5384 fnd = 1; 5385 break; 5386 } 5387 } 5388 5389 if (fnd == 0) { 5390 /* Not in the ep list */ 5391 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5392 if (error != 0) 5393 return; 5394 inp->laddr_count++; 5395 /* update inp_vflag flags */ 5396 switch (ifa->address.sa.sa_family) { 5397 #ifdef INET6 5398 case AF_INET6: 5399 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5400 break; 5401 #endif 5402 #ifdef INET 5403 case AF_INET: 5404 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5405 break; 5406 #endif 5407 default: 5408 break; 5409 } 5410 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5411 sctp_add_local_addr_restricted(stcb, ifa); 5412 } 5413 } 5414 return; 5415 } 5416 5417 5418 /* 5419 * select a new (hopefully reachable) destination net (should only be used 5420 * when we deleted an ep addr that is the only usable source address to reach 5421 * the destination net) 5422 */ 5423 static void 5424 sctp_select_primary_destination(struct sctp_tcb *stcb) 5425 { 5426 struct sctp_nets *net; 5427 5428 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5429 /* for now, we'll just pick the first reachable one we find */ 5430 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5431 continue; 5432 if (sctp_destination_is_reachable(stcb, 5433 (struct sockaddr *)&net->ro._l_addr)) { 5434 /* found a reachable destination */ 5435 stcb->asoc.primary_destination = net; 5436 } 5437 } 5438 /* I can't there from here! ...we're gonna die shortly... */ 5439 } 5440 5441 5442 /* 5443 * Delete the address from the endpoint local address list. There is nothing 5444 * to be done if we are bound to all addresses 5445 */ 5446 void 5447 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5448 { 5449 struct sctp_laddr *laddr; 5450 int fnd; 5451 5452 fnd = 0; 5453 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5454 /* You are already bound to all. You have it already */ 5455 return; 5456 } 5457 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5458 if (laddr->ifa == ifa) { 5459 fnd = 1; 5460 break; 5461 } 5462 } 5463 if (fnd && (inp->laddr_count < 2)) { 5464 /* can't delete unless there are at LEAST 2 addresses */ 5465 return; 5466 } 5467 if (fnd) { 5468 /* 5469 * clean up any use of this address go through our 5470 * associations and clear any last_used_address that match 5471 * this one for each assoc, see if a new primary_destination 5472 * is needed 5473 */ 5474 struct sctp_tcb *stcb; 5475 5476 /* clean up "next_addr_touse" */ 5477 if (inp->next_addr_touse == laddr) 5478 /* delete this address */ 5479 inp->next_addr_touse = NULL; 5480 5481 /* clean up "last_used_address" */ 5482 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5483 struct sctp_nets *net; 5484 5485 SCTP_TCB_LOCK(stcb); 5486 if (stcb->asoc.last_used_address == laddr) 5487 /* delete this address */ 5488 stcb->asoc.last_used_address = NULL; 5489 /* 5490 * Now spin through all the nets and purge any ref 5491 * to laddr 5492 */ 5493 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5494 if (net->ro._s_addr == laddr->ifa) { 5495 /* Yep, purge src address selected */ 5496 sctp_rtentry_t *rt; 5497 5498 /* delete this address if cached */ 5499 rt = net->ro.ro_rt; 5500 if (rt != NULL) { 5501 RTFREE(rt); 5502 net->ro.ro_rt = NULL; 5503 } 5504 sctp_free_ifa(net->ro._s_addr); 5505 net->ro._s_addr = NULL; 5506 net->src_addr_selected = 0; 5507 } 5508 } 5509 SCTP_TCB_UNLOCK(stcb); 5510 } /* for each tcb */ 5511 /* remove it from the ep list */ 5512 sctp_remove_laddr(laddr); 5513 inp->laddr_count--; 5514 /* update inp_vflag flags */ 5515 sctp_update_ep_vflag(inp); 5516 } 5517 return; 5518 } 5519 5520 /* 5521 * Add the address to the TCB local address restricted list. 5522 * This is a "pending" address list (eg. addresses waiting for an 5523 * ASCONF-ACK response) and cannot be used as a valid source address. 5524 */ 5525 void 5526 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5527 { 5528 struct sctp_laddr *laddr; 5529 struct sctpladdr *list; 5530 5531 /* 5532 * Assumes TCB is locked.. and possibly the INP. May need to 5533 * confirm/fix that if we need it and is not the case. 5534 */ 5535 list = &stcb->asoc.sctp_restricted_addrs; 5536 5537 #ifdef INET6 5538 if (ifa->address.sa.sa_family == AF_INET6) { 5539 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5540 /* Can't bind a non-existent addr. */ 5541 return; 5542 } 5543 } 5544 #endif 5545 /* does the address already exist? */ 5546 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5547 if (laddr->ifa == ifa) { 5548 return; 5549 } 5550 } 5551 5552 /* add to the list */ 5553 (void)sctp_insert_laddr(list, ifa, 0); 5554 return; 5555 } 5556 5557 /* 5558 * Remove a local address from the TCB local address restricted list 5559 */ 5560 void 5561 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5562 { 5563 struct sctp_inpcb *inp; 5564 struct sctp_laddr *laddr; 5565 5566 /* 5567 * This is called by asconf work. It is assumed that a) The TCB is 5568 * locked and b) The INP is locked. This is true in as much as I can 5569 * trace through the entry asconf code where I did these locks. 5570 * Again, the ASCONF code is a bit different in that it does lock 5571 * the INP during its work often times. This must be since we don't 5572 * want other proc's looking up things while what they are looking 5573 * up is changing :-D 5574 */ 5575 5576 inp = stcb->sctp_ep; 5577 /* if subset bound and don't allow ASCONF's, can't delete last */ 5578 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5579 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5580 if (stcb->sctp_ep->laddr_count < 2) { 5581 /* can't delete last address */ 5582 return; 5583 } 5584 } 5585 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5586 /* remove the address if it exists */ 5587 if (laddr->ifa == NULL) 5588 continue; 5589 if (laddr->ifa == ifa) { 5590 sctp_remove_laddr(laddr); 5591 return; 5592 } 5593 } 5594 5595 /* address not found! */ 5596 return; 5597 } 5598 5599 /* 5600 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5601 */ 5602 /* sysctl */ 5603 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5604 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5605 5606 5607 5608 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5609 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5610 int *sctp_cpuarry = NULL; 5611 void 5612 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5613 { 5614 /* Queue a packet to a processor for the specified core */ 5615 struct sctp_mcore_queue *qent; 5616 struct sctp_mcore_ctrl *wkq; 5617 int need_wake = 0; 5618 5619 if (sctp_mcore_workers == NULL) { 5620 /* Something went way bad during setup */ 5621 sctp_input_with_port(m, off, 0); 5622 return; 5623 } 5624 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5625 (sizeof(struct sctp_mcore_queue)), 5626 SCTP_M_MCORE); 5627 if (qent == NULL) { 5628 /* This is trouble */ 5629 sctp_input_with_port(m, off, 0); 5630 return; 5631 } 5632 qent->vn = curvnet; 5633 qent->m = m; 5634 qent->off = off; 5635 qent->v6 = 0; 5636 wkq = &sctp_mcore_workers[cpu_to_use]; 5637 SCTP_MCORE_QLOCK(wkq); 5638 5639 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5640 if (wkq->running == 0) { 5641 need_wake = 1; 5642 } 5643 SCTP_MCORE_QUNLOCK(wkq); 5644 if (need_wake) { 5645 wakeup(&wkq->running); 5646 } 5647 } 5648 5649 static void 5650 sctp_mcore_thread(void *arg) 5651 { 5652 5653 struct sctp_mcore_ctrl *wkq; 5654 struct sctp_mcore_queue *qent; 5655 5656 wkq = (struct sctp_mcore_ctrl *)arg; 5657 struct mbuf *m; 5658 int off, v6; 5659 5660 /* Wait for first tickle */ 5661 SCTP_MCORE_LOCK(wkq); 5662 wkq->running = 0; 5663 msleep(&wkq->running, 5664 &wkq->core_mtx, 5665 0, "wait for pkt", 0); 5666 SCTP_MCORE_UNLOCK(wkq); 5667 5668 /* Bind to our cpu */ 5669 thread_lock(curthread); 5670 sched_bind(curthread, wkq->cpuid); 5671 thread_unlock(curthread); 5672 5673 /* Now lets start working */ 5674 SCTP_MCORE_LOCK(wkq); 5675 /* Now grab lock and go */ 5676 for (;;) { 5677 SCTP_MCORE_QLOCK(wkq); 5678 skip_sleep: 5679 wkq->running = 1; 5680 qent = TAILQ_FIRST(&wkq->que); 5681 if (qent) { 5682 TAILQ_REMOVE(&wkq->que, qent, next); 5683 SCTP_MCORE_QUNLOCK(wkq); 5684 CURVNET_SET(qent->vn); 5685 m = qent->m; 5686 off = qent->off; 5687 v6 = qent->v6; 5688 SCTP_FREE(qent, SCTP_M_MCORE); 5689 if (v6 == 0) { 5690 sctp_input_with_port(m, off, 0); 5691 } else { 5692 SCTP_PRINTF("V6 not yet supported\n"); 5693 sctp_m_freem(m); 5694 } 5695 CURVNET_RESTORE(); 5696 SCTP_MCORE_QLOCK(wkq); 5697 } 5698 wkq->running = 0; 5699 if (!TAILQ_EMPTY(&wkq->que)) { 5700 goto skip_sleep; 5701 } 5702 SCTP_MCORE_QUNLOCK(wkq); 5703 msleep(&wkq->running, 5704 &wkq->core_mtx, 5705 0, "wait for pkt", 0); 5706 } 5707 } 5708 5709 static void 5710 sctp_startup_mcore_threads(void) 5711 { 5712 int i, cpu; 5713 5714 if (mp_ncpus == 1) 5715 return; 5716 5717 if (sctp_mcore_workers != NULL) { 5718 /* 5719 * Already been here in some previous vnet? 5720 */ 5721 return; 5722 } 5723 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5724 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5725 SCTP_M_MCORE); 5726 if (sctp_mcore_workers == NULL) { 5727 /* TSNH I hope */ 5728 return; 5729 } 5730 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5731 sizeof(struct sctp_mcore_ctrl))); 5732 /* Init the structures */ 5733 for (i = 0; i <= mp_maxid; i++) { 5734 TAILQ_INIT(&sctp_mcore_workers[i].que); 5735 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5736 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5737 sctp_mcore_workers[i].cpuid = i; 5738 } 5739 if (sctp_cpuarry == NULL) { 5740 SCTP_MALLOC(sctp_cpuarry, int *, 5741 (mp_ncpus * sizeof(int)), 5742 SCTP_M_MCORE); 5743 i = 0; 5744 CPU_FOREACH(cpu) { 5745 sctp_cpuarry[i] = cpu; 5746 i++; 5747 } 5748 } 5749 /* Now start them all */ 5750 CPU_FOREACH(cpu) { 5751 (void)kproc_create(sctp_mcore_thread, 5752 (void *)&sctp_mcore_workers[cpu], 5753 &sctp_mcore_workers[cpu].thread_proc, 5754 RFPROC, 5755 SCTP_KTHREAD_PAGES, 5756 SCTP_MCORE_NAME); 5757 5758 } 5759 } 5760 #endif 5761 5762 void 5763 sctp_pcb_init() 5764 { 5765 /* 5766 * SCTP initialization for the PCB structures should be called by 5767 * the sctp_init() function. 5768 */ 5769 int i; 5770 struct timeval tv; 5771 5772 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5773 /* error I was called twice */ 5774 return; 5775 } 5776 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5777 5778 #if defined(SCTP_LOCAL_TRACE_BUF) 5779 memset(&SCTP_BASE_SYSCTL(sctp_log), 0, sizeof(struct sctp_log)); 5780 #endif 5781 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5782 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5783 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5784 SCTP_M_MCORE); 5785 #endif 5786 (void)SCTP_GETTIME_TIMEVAL(&tv); 5787 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5788 memset(SCTP_BASE_STATS, 0, sizeof(struct sctpstat) * (mp_maxid + 1)); 5789 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t)tv.tv_sec; 5790 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t)tv.tv_usec; 5791 #else 5792 memset(&SCTP_BASE_STATS, 0, sizeof(struct sctpstat)); 5793 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t)tv.tv_sec; 5794 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t)tv.tv_usec; 5795 #endif 5796 /* init the empty list of (All) Endpoints */ 5797 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5798 5799 5800 /* init the hash table of endpoints */ 5801 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5802 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5803 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5804 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5805 &SCTP_BASE_INFO(hashasocmark)); 5806 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5807 &SCTP_BASE_INFO(hashmark)); 5808 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5809 &SCTP_BASE_INFO(hashtcpmark)); 5810 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5811 5812 5813 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5814 &SCTP_BASE_INFO(hashvrfmark)); 5815 5816 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5817 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5818 /* init the zones */ 5819 /* 5820 * FIX ME: Should check for NULL returns, but if it does fail we are 5821 * doomed to panic anyways... add later maybe. 5822 */ 5823 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5824 sizeof(struct sctp_inpcb), maxsockets); 5825 5826 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5827 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5828 5829 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5830 sizeof(struct sctp_laddr), 5831 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5832 5833 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5834 sizeof(struct sctp_nets), 5835 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5836 5837 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5838 sizeof(struct sctp_tmit_chunk), 5839 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5840 5841 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5842 sizeof(struct sctp_queued_to_read), 5843 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5844 5845 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5846 sizeof(struct sctp_stream_queue_pending), 5847 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5848 5849 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5850 sizeof(struct sctp_asconf), 5851 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5852 5853 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5854 sizeof(struct sctp_asconf_ack), 5855 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5856 5857 5858 /* Master Lock INIT for info structure */ 5859 SCTP_INP_INFO_LOCK_INIT(); 5860 SCTP_STATLOG_INIT_LOCK(); 5861 5862 SCTP_IPI_COUNT_INIT(); 5863 SCTP_IPI_ADDR_INIT(); 5864 #ifdef SCTP_PACKET_LOGGING 5865 SCTP_IP_PKTLOG_INIT(); 5866 #endif 5867 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5868 5869 SCTP_WQ_ADDR_INIT(); 5870 /* not sure if we need all the counts */ 5871 SCTP_BASE_INFO(ipi_count_ep) = 0; 5872 /* assoc/tcb zone info */ 5873 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5874 /* local addrlist zone info */ 5875 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5876 /* remote addrlist zone info */ 5877 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5878 /* chunk info */ 5879 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5880 5881 /* socket queue zone info */ 5882 SCTP_BASE_INFO(ipi_count_readq) = 0; 5883 5884 /* stream out queue cont */ 5885 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5886 5887 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5888 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5889 5890 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5891 5892 /* Init the TIMEWAIT list */ 5893 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5894 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5895 } 5896 sctp_startup_iterator(); 5897 5898 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5899 sctp_startup_mcore_threads(); 5900 #endif 5901 5902 /* 5903 * INIT the default VRF which for BSD is the only one, other O/S's 5904 * may have more. But initially they must start with one and then 5905 * add the VRF's as addresses are added. 5906 */ 5907 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5908 } 5909 5910 /* 5911 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5912 */ 5913 void 5914 sctp_pcb_finish(void) 5915 { 5916 struct sctp_vrflist *vrf_bucket; 5917 struct sctp_vrf *vrf, *nvrf; 5918 struct sctp_ifn *ifn, *nifn; 5919 struct sctp_ifa *ifa, *nifa; 5920 struct sctpvtaghead *chain; 5921 struct sctp_tagblock *twait_block, *prev_twait_block; 5922 struct sctp_laddr *wi, *nwi; 5923 int i; 5924 struct sctp_iterator *it, *nit; 5925 5926 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5927 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5928 return; 5929 } 5930 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5931 /* 5932 * In FreeBSD the iterator thread never exits but we do clean up. 5933 * The only way FreeBSD reaches here is if we have VRF's but we 5934 * still add the ifdef to make it compile on old versions. 5935 */ 5936 retry: 5937 SCTP_IPI_ITERATOR_WQ_LOCK(); 5938 /* 5939 * sctp_iterator_worker() might be working on an it entry without 5940 * holding the lock. We won't find it on the list either and 5941 * continue and free/destroy it. While holding the lock, spin, to 5942 * avoid the race condition as sctp_iterator_worker() will have to 5943 * wait to re-aquire the lock. 5944 */ 5945 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5946 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5947 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5948 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5949 DELAY(10); 5950 goto retry; 5951 } 5952 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5953 if (it->vn != curvnet) { 5954 continue; 5955 } 5956 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5957 if (it->function_atend != NULL) { 5958 (*it->function_atend) (it->pointer, it->val); 5959 } 5960 SCTP_FREE(it, SCTP_M_ITER); 5961 } 5962 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5963 SCTP_ITERATOR_LOCK(); 5964 if ((sctp_it_ctl.cur_it) && 5965 (sctp_it_ctl.cur_it->vn == curvnet)) { 5966 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5967 } 5968 SCTP_ITERATOR_UNLOCK(); 5969 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5970 SCTP_WQ_ADDR_LOCK(); 5971 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5972 LIST_REMOVE(wi, sctp_nxt_addr); 5973 SCTP_DECR_LADDR_COUNT(); 5974 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5975 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5976 } 5977 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5978 } 5979 SCTP_WQ_ADDR_UNLOCK(); 5980 5981 /* 5982 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5983 * destroyed first). 5984 */ 5985 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5986 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5987 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5988 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5989 /* free the ifa */ 5990 LIST_REMOVE(ifa, next_bucket); 5991 LIST_REMOVE(ifa, next_ifa); 5992 SCTP_FREE(ifa, SCTP_M_IFA); 5993 } 5994 /* free the ifn */ 5995 LIST_REMOVE(ifn, next_bucket); 5996 LIST_REMOVE(ifn, next_ifn); 5997 SCTP_FREE(ifn, SCTP_M_IFN); 5998 } 5999 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 6000 /* free the vrf */ 6001 LIST_REMOVE(vrf, next_vrf); 6002 SCTP_FREE(vrf, SCTP_M_VRF); 6003 } 6004 /* free the vrf hashes */ 6005 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6006 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6007 6008 /* 6009 * free the TIMEWAIT list elements malloc'd in the function 6010 * sctp_add_vtag_to_timewait()... 6011 */ 6012 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6013 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6014 if (!LIST_EMPTY(chain)) { 6015 prev_twait_block = NULL; 6016 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6017 if (prev_twait_block) { 6018 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6019 } 6020 prev_twait_block = twait_block; 6021 } 6022 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6023 } 6024 } 6025 6026 /* free the locks and mutexes */ 6027 #ifdef SCTP_PACKET_LOGGING 6028 SCTP_IP_PKTLOG_DESTROY(); 6029 #endif 6030 SCTP_IPI_ADDR_DESTROY(); 6031 SCTP_STATLOG_DESTROY(); 6032 SCTP_INP_INFO_LOCK_DESTROY(); 6033 6034 SCTP_WQ_ADDR_DESTROY(); 6035 6036 /* Get rid of other stuff too. */ 6037 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6038 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6039 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6040 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6041 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6042 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6043 6044 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6045 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6046 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6047 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6048 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6049 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6050 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6051 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6052 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6053 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6054 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6055 #endif 6056 } 6057 6058 6059 int 6060 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6061 int offset, int limit, 6062 struct sockaddr *src, struct sockaddr *dst, 6063 struct sockaddr *altsa, uint16_t port) 6064 { 6065 /* 6066 * grub through the INIT pulling addresses and loading them to the 6067 * nets structure in the asoc. The from address in the mbuf should 6068 * also be loaded (if it is not already). This routine can be called 6069 * with either INIT or INIT-ACK's as long as the m points to the IP 6070 * packet and the offset points to the beginning of the parameters. 6071 */ 6072 struct sctp_inpcb *inp; 6073 struct sctp_nets *net, *nnet, *net_tmp; 6074 struct sctp_paramhdr *phdr, param_buf; 6075 struct sctp_tcb *stcb_tmp; 6076 uint16_t ptype, plen; 6077 struct sockaddr *sa; 6078 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6079 struct sctp_auth_random *p_random = NULL; 6080 uint16_t random_len = 0; 6081 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6082 struct sctp_auth_hmac_algo *hmacs = NULL; 6083 uint16_t hmacs_len = 0; 6084 uint8_t saw_asconf = 0; 6085 uint8_t saw_asconf_ack = 0; 6086 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6087 struct sctp_auth_chunk_list *chunks = NULL; 6088 uint16_t num_chunks = 0; 6089 sctp_key_t *new_key; 6090 uint32_t keylen; 6091 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6092 uint8_t peer_supports_ecn; 6093 uint8_t peer_supports_prsctp; 6094 uint8_t peer_supports_auth; 6095 uint8_t peer_supports_asconf; 6096 uint8_t peer_supports_asconf_ack; 6097 uint8_t peer_supports_reconfig; 6098 uint8_t peer_supports_nrsack; 6099 uint8_t peer_supports_pktdrop; 6100 uint8_t peer_supports_idata; 6101 #ifdef INET 6102 struct sockaddr_in sin; 6103 #endif 6104 #ifdef INET6 6105 struct sockaddr_in6 sin6; 6106 #endif 6107 6108 /* First get the destination address setup too. */ 6109 #ifdef INET 6110 memset(&sin, 0, sizeof(sin)); 6111 sin.sin_family = AF_INET; 6112 sin.sin_len = sizeof(sin); 6113 sin.sin_port = stcb->rport; 6114 #endif 6115 #ifdef INET6 6116 memset(&sin6, 0, sizeof(sin6)); 6117 sin6.sin6_family = AF_INET6; 6118 sin6.sin6_len = sizeof(struct sockaddr_in6); 6119 sin6.sin6_port = stcb->rport; 6120 #endif 6121 if (altsa) { 6122 sa = altsa; 6123 } else { 6124 sa = src; 6125 } 6126 peer_supports_idata = 0; 6127 peer_supports_ecn = 0; 6128 peer_supports_prsctp = 0; 6129 peer_supports_auth = 0; 6130 peer_supports_asconf = 0; 6131 peer_supports_reconfig = 0; 6132 peer_supports_nrsack = 0; 6133 peer_supports_pktdrop = 0; 6134 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6135 /* mark all addresses that we have currently on the list */ 6136 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6137 } 6138 /* does the source address already exist? if so skip it */ 6139 inp = stcb->sctp_ep; 6140 atomic_add_int(&stcb->asoc.refcnt, 1); 6141 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6142 atomic_add_int(&stcb->asoc.refcnt, -1); 6143 6144 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6145 /* we must add the source address */ 6146 /* no scope set here since we have a tcb already. */ 6147 switch (sa->sa_family) { 6148 #ifdef INET 6149 case AF_INET: 6150 if (stcb->asoc.scope.ipv4_addr_legal) { 6151 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6152 return (-1); 6153 } 6154 } 6155 break; 6156 #endif 6157 #ifdef INET6 6158 case AF_INET6: 6159 if (stcb->asoc.scope.ipv6_addr_legal) { 6160 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6161 return (-2); 6162 } 6163 } 6164 break; 6165 #endif 6166 default: 6167 break; 6168 } 6169 } else { 6170 if (net_tmp != NULL && stcb_tmp == stcb) { 6171 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6172 } else if (stcb_tmp != stcb) { 6173 /* It belongs to another association? */ 6174 if (stcb_tmp) 6175 SCTP_TCB_UNLOCK(stcb_tmp); 6176 return (-3); 6177 } 6178 } 6179 if (stcb->asoc.state == 0) { 6180 /* the assoc was freed? */ 6181 return (-4); 6182 } 6183 /* now we must go through each of the params. */ 6184 phdr = sctp_get_next_param(m, offset, ¶m_buf, sizeof(param_buf)); 6185 while (phdr) { 6186 ptype = ntohs(phdr->param_type); 6187 plen = ntohs(phdr->param_length); 6188 /* 6189 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6190 * (uint32_t)ptype, (int)plen); 6191 */ 6192 if (offset + plen > limit) { 6193 break; 6194 } 6195 if (plen == 0) { 6196 break; 6197 } 6198 #ifdef INET 6199 if (ptype == SCTP_IPV4_ADDRESS) { 6200 if (stcb->asoc.scope.ipv4_addr_legal) { 6201 struct sctp_ipv4addr_param *p4, p4_buf; 6202 6203 /* ok get the v4 address and check/add */ 6204 phdr = sctp_get_next_param(m, offset, 6205 (struct sctp_paramhdr *)&p4_buf, 6206 sizeof(p4_buf)); 6207 if (plen != sizeof(struct sctp_ipv4addr_param) || 6208 phdr == NULL) { 6209 return (-5); 6210 } 6211 p4 = (struct sctp_ipv4addr_param *)phdr; 6212 sin.sin_addr.s_addr = p4->addr; 6213 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6214 /* Skip multi-cast addresses */ 6215 goto next_param; 6216 } 6217 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6218 (sin.sin_addr.s_addr == INADDR_ANY)) { 6219 goto next_param; 6220 } 6221 sa = (struct sockaddr *)&sin; 6222 inp = stcb->sctp_ep; 6223 atomic_add_int(&stcb->asoc.refcnt, 1); 6224 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6225 dst, stcb); 6226 atomic_add_int(&stcb->asoc.refcnt, -1); 6227 6228 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6229 inp == NULL) { 6230 /* we must add the source address */ 6231 /* 6232 * no scope set since we have a tcb 6233 * already 6234 */ 6235 6236 /* 6237 * we must validate the state again 6238 * here 6239 */ 6240 add_it_now: 6241 if (stcb->asoc.state == 0) { 6242 /* the assoc was freed? */ 6243 return (-7); 6244 } 6245 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6246 return (-8); 6247 } 6248 } else if (stcb_tmp == stcb) { 6249 if (stcb->asoc.state == 0) { 6250 /* the assoc was freed? */ 6251 return (-10); 6252 } 6253 if (net != NULL) { 6254 /* clear flag */ 6255 net->dest_state &= 6256 ~SCTP_ADDR_NOT_IN_ASSOC; 6257 } 6258 } else { 6259 /* 6260 * strange, address is in another 6261 * assoc? straighten out locks. 6262 */ 6263 if (stcb_tmp) { 6264 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6265 struct mbuf *op_err; 6266 char msg[SCTP_DIAG_INFO_LEN]; 6267 6268 /* 6269 * in setup state we 6270 * abort this guy 6271 */ 6272 snprintf(msg, sizeof(msg), 6273 "%s:%d at %s", __FILE__, __LINE__, __func__); 6274 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6275 msg); 6276 sctp_abort_an_association(stcb_tmp->sctp_ep, 6277 stcb_tmp, op_err, 6278 SCTP_SO_NOT_LOCKED); 6279 goto add_it_now; 6280 } 6281 SCTP_TCB_UNLOCK(stcb_tmp); 6282 } 6283 if (stcb->asoc.state == 0) { 6284 /* the assoc was freed? */ 6285 return (-12); 6286 } 6287 return (-13); 6288 } 6289 } 6290 } else 6291 #endif 6292 #ifdef INET6 6293 if (ptype == SCTP_IPV6_ADDRESS) { 6294 if (stcb->asoc.scope.ipv6_addr_legal) { 6295 /* ok get the v6 address and check/add */ 6296 struct sctp_ipv6addr_param *p6, p6_buf; 6297 6298 phdr = sctp_get_next_param(m, offset, 6299 (struct sctp_paramhdr *)&p6_buf, 6300 sizeof(p6_buf)); 6301 if (plen != sizeof(struct sctp_ipv6addr_param) || 6302 phdr == NULL) { 6303 return (-14); 6304 } 6305 p6 = (struct sctp_ipv6addr_param *)phdr; 6306 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6307 sizeof(p6->addr)); 6308 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6309 /* Skip multi-cast addresses */ 6310 goto next_param; 6311 } 6312 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6313 /* 6314 * Link local make no sense without 6315 * scope 6316 */ 6317 goto next_param; 6318 } 6319 sa = (struct sockaddr *)&sin6; 6320 inp = stcb->sctp_ep; 6321 atomic_add_int(&stcb->asoc.refcnt, 1); 6322 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6323 dst, stcb); 6324 atomic_add_int(&stcb->asoc.refcnt, -1); 6325 if (stcb_tmp == NULL && 6326 (inp == stcb->sctp_ep || inp == NULL)) { 6327 /* 6328 * we must validate the state again 6329 * here 6330 */ 6331 add_it_now6: 6332 if (stcb->asoc.state == 0) { 6333 /* the assoc was freed? */ 6334 return (-16); 6335 } 6336 /* 6337 * we must add the address, no scope 6338 * set 6339 */ 6340 if (sctp_add_remote_addr(stcb, sa, NULL, port, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6341 return (-17); 6342 } 6343 } else if (stcb_tmp == stcb) { 6344 /* 6345 * we must validate the state again 6346 * here 6347 */ 6348 if (stcb->asoc.state == 0) { 6349 /* the assoc was freed? */ 6350 return (-19); 6351 } 6352 if (net != NULL) { 6353 /* clear flag */ 6354 net->dest_state &= 6355 ~SCTP_ADDR_NOT_IN_ASSOC; 6356 } 6357 } else { 6358 /* 6359 * strange, address is in another 6360 * assoc? straighten out locks. 6361 */ 6362 if (stcb_tmp) { 6363 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6364 struct mbuf *op_err; 6365 char msg[SCTP_DIAG_INFO_LEN]; 6366 6367 /* 6368 * in setup state we 6369 * abort this guy 6370 */ 6371 snprintf(msg, sizeof(msg), 6372 "%s:%d at %s", __FILE__, __LINE__, __func__); 6373 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6374 msg); 6375 sctp_abort_an_association(stcb_tmp->sctp_ep, 6376 stcb_tmp, op_err, 6377 SCTP_SO_NOT_LOCKED); 6378 goto add_it_now6; 6379 } 6380 SCTP_TCB_UNLOCK(stcb_tmp); 6381 } 6382 if (stcb->asoc.state == 0) { 6383 /* the assoc was freed? */ 6384 return (-21); 6385 } 6386 return (-22); 6387 } 6388 } 6389 } else 6390 #endif 6391 if (ptype == SCTP_ECN_CAPABLE) { 6392 peer_supports_ecn = 1; 6393 } else if (ptype == SCTP_ULP_ADAPTATION) { 6394 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6395 struct sctp_adaptation_layer_indication ai, 6396 *aip; 6397 6398 phdr = sctp_get_next_param(m, offset, 6399 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6400 aip = (struct sctp_adaptation_layer_indication *)phdr; 6401 if (aip) { 6402 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6403 stcb->asoc.adaptation_needed = 1; 6404 } 6405 } 6406 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6407 struct sctp_asconf_addr_param lstore, *fee; 6408 int lptype; 6409 struct sockaddr *lsa = NULL; 6410 #ifdef INET 6411 struct sctp_asconf_addrv4_param *fii; 6412 #endif 6413 6414 if (stcb->asoc.asconf_supported == 0) { 6415 return (-100); 6416 } 6417 if (plen > sizeof(lstore)) { 6418 return (-23); 6419 } 6420 phdr = sctp_get_next_param(m, offset, 6421 (struct sctp_paramhdr *)&lstore, 6422 plen); 6423 if (phdr == NULL) { 6424 return (-24); 6425 } 6426 fee = (struct sctp_asconf_addr_param *)phdr; 6427 lptype = ntohs(fee->addrp.ph.param_type); 6428 switch (lptype) { 6429 #ifdef INET 6430 case SCTP_IPV4_ADDRESS: 6431 if (plen != 6432 sizeof(struct sctp_asconf_addrv4_param)) { 6433 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6434 (int)sizeof(struct sctp_asconf_addrv4_param), 6435 plen); 6436 } else { 6437 fii = (struct sctp_asconf_addrv4_param *)fee; 6438 sin.sin_addr.s_addr = fii->addrp.addr; 6439 lsa = (struct sockaddr *)&sin; 6440 } 6441 break; 6442 #endif 6443 #ifdef INET6 6444 case SCTP_IPV6_ADDRESS: 6445 if (plen != 6446 sizeof(struct sctp_asconf_addr_param)) { 6447 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6448 (int)sizeof(struct sctp_asconf_addr_param), 6449 plen); 6450 } else { 6451 memcpy(sin6.sin6_addr.s6_addr, 6452 fee->addrp.addr, 6453 sizeof(fee->addrp.addr)); 6454 lsa = (struct sockaddr *)&sin6; 6455 } 6456 break; 6457 #endif 6458 default: 6459 break; 6460 } 6461 if (lsa) { 6462 (void)sctp_set_primary_addr(stcb, sa, NULL); 6463 } 6464 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6465 stcb->asoc.peer_supports_nat = 1; 6466 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6467 /* Peer supports pr-sctp */ 6468 peer_supports_prsctp = 1; 6469 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6470 /* A supported extension chunk */ 6471 struct sctp_supported_chunk_types_param *pr_supported; 6472 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6473 int num_ent, i; 6474 6475 if (plen > sizeof(local_store)) { 6476 return (-35); 6477 } 6478 phdr = sctp_get_next_param(m, offset, 6479 (struct sctp_paramhdr *)&local_store, plen); 6480 if (phdr == NULL) { 6481 return (-25); 6482 } 6483 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6484 num_ent = plen - sizeof(struct sctp_paramhdr); 6485 for (i = 0; i < num_ent; i++) { 6486 switch (pr_supported->chunk_types[i]) { 6487 case SCTP_ASCONF: 6488 peer_supports_asconf = 1; 6489 break; 6490 case SCTP_ASCONF_ACK: 6491 peer_supports_asconf_ack = 1; 6492 break; 6493 case SCTP_FORWARD_CUM_TSN: 6494 peer_supports_prsctp = 1; 6495 break; 6496 case SCTP_PACKET_DROPPED: 6497 peer_supports_pktdrop = 1; 6498 break; 6499 case SCTP_NR_SELECTIVE_ACK: 6500 peer_supports_nrsack = 1; 6501 break; 6502 case SCTP_STREAM_RESET: 6503 peer_supports_reconfig = 1; 6504 break; 6505 case SCTP_AUTHENTICATION: 6506 peer_supports_auth = 1; 6507 break; 6508 case SCTP_IDATA: 6509 peer_supports_idata = 1; 6510 break; 6511 default: 6512 /* one I have not learned yet */ 6513 break; 6514 6515 } 6516 } 6517 } else if (ptype == SCTP_RANDOM) { 6518 if (plen > sizeof(random_store)) 6519 break; 6520 if (got_random) { 6521 /* already processed a RANDOM */ 6522 goto next_param; 6523 } 6524 phdr = sctp_get_next_param(m, offset, 6525 (struct sctp_paramhdr *)random_store, 6526 plen); 6527 if (phdr == NULL) 6528 return (-26); 6529 p_random = (struct sctp_auth_random *)phdr; 6530 random_len = plen - sizeof(*p_random); 6531 /* enforce the random length */ 6532 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6533 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6534 return (-27); 6535 } 6536 got_random = 1; 6537 } else if (ptype == SCTP_HMAC_LIST) { 6538 uint16_t num_hmacs; 6539 uint16_t i; 6540 6541 if (plen > sizeof(hmacs_store)) 6542 break; 6543 if (got_hmacs) { 6544 /* already processed a HMAC list */ 6545 goto next_param; 6546 } 6547 phdr = sctp_get_next_param(m, offset, 6548 (struct sctp_paramhdr *)hmacs_store, 6549 plen); 6550 if (phdr == NULL) 6551 return (-28); 6552 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6553 hmacs_len = plen - sizeof(*hmacs); 6554 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6555 /* validate the hmac list */ 6556 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6557 return (-29); 6558 } 6559 if (stcb->asoc.peer_hmacs != NULL) 6560 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6561 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6562 if (stcb->asoc.peer_hmacs != NULL) { 6563 for (i = 0; i < num_hmacs; i++) { 6564 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6565 ntohs(hmacs->hmac_ids[i])); 6566 } 6567 } 6568 got_hmacs = 1; 6569 } else if (ptype == SCTP_CHUNK_LIST) { 6570 int i; 6571 6572 if (plen > sizeof(chunks_store)) 6573 break; 6574 if (got_chklist) { 6575 /* already processed a Chunks list */ 6576 goto next_param; 6577 } 6578 phdr = sctp_get_next_param(m, offset, 6579 (struct sctp_paramhdr *)chunks_store, 6580 plen); 6581 if (phdr == NULL) 6582 return (-30); 6583 chunks = (struct sctp_auth_chunk_list *)phdr; 6584 num_chunks = plen - sizeof(*chunks); 6585 if (stcb->asoc.peer_auth_chunks != NULL) 6586 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6587 else 6588 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6589 for (i = 0; i < num_chunks; i++) { 6590 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6591 stcb->asoc.peer_auth_chunks); 6592 /* record asconf/asconf-ack if listed */ 6593 if (chunks->chunk_types[i] == SCTP_ASCONF) 6594 saw_asconf = 1; 6595 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6596 saw_asconf_ack = 1; 6597 6598 } 6599 got_chklist = 1; 6600 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6601 (ptype == SCTP_STATE_COOKIE) || 6602 (ptype == SCTP_UNRECOG_PARAM) || 6603 (ptype == SCTP_COOKIE_PRESERVE) || 6604 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6605 (ptype == SCTP_ADD_IP_ADDRESS) || 6606 (ptype == SCTP_DEL_IP_ADDRESS) || 6607 (ptype == SCTP_ERROR_CAUSE_IND) || 6608 (ptype == SCTP_SUCCESS_REPORT)) { 6609 /* don't care */ ; 6610 } else { 6611 if ((ptype & 0x8000) == 0x0000) { 6612 /* 6613 * must stop processing the rest of the 6614 * param's. Any report bits were handled 6615 * with the call to 6616 * sctp_arethere_unrecognized_parameters() 6617 * when the INIT or INIT-ACK was first seen. 6618 */ 6619 break; 6620 } 6621 } 6622 6623 next_param: 6624 offset += SCTP_SIZE32(plen); 6625 if (offset >= limit) { 6626 break; 6627 } 6628 phdr = sctp_get_next_param(m, offset, ¶m_buf, 6629 sizeof(param_buf)); 6630 } 6631 /* Now check to see if we need to purge any addresses */ 6632 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6633 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6634 SCTP_ADDR_NOT_IN_ASSOC) { 6635 /* This address has been removed from the asoc */ 6636 /* remove and free it */ 6637 stcb->asoc.numnets--; 6638 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6639 sctp_free_remote_addr(net); 6640 if (net == stcb->asoc.primary_destination) { 6641 stcb->asoc.primary_destination = NULL; 6642 sctp_select_primary_destination(stcb); 6643 } 6644 } 6645 } 6646 if ((stcb->asoc.ecn_supported == 1) && 6647 (peer_supports_ecn == 0)) { 6648 stcb->asoc.ecn_supported = 0; 6649 } 6650 if ((stcb->asoc.prsctp_supported == 1) && 6651 (peer_supports_prsctp == 0)) { 6652 stcb->asoc.prsctp_supported = 0; 6653 } 6654 if ((stcb->asoc.auth_supported == 1) && 6655 ((peer_supports_auth == 0) || 6656 (got_random == 0) || (got_hmacs == 0))) { 6657 stcb->asoc.auth_supported = 0; 6658 } 6659 if ((stcb->asoc.asconf_supported == 1) && 6660 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6661 (stcb->asoc.auth_supported == 0) || 6662 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6663 stcb->asoc.asconf_supported = 0; 6664 } 6665 if ((stcb->asoc.reconfig_supported == 1) && 6666 (peer_supports_reconfig == 0)) { 6667 stcb->asoc.reconfig_supported = 0; 6668 } 6669 if ((stcb->asoc.idata_supported == 1) && 6670 (peer_supports_idata == 0)) { 6671 stcb->asoc.idata_supported = 0; 6672 } 6673 if ((stcb->asoc.nrsack_supported == 1) && 6674 (peer_supports_nrsack == 0)) { 6675 stcb->asoc.nrsack_supported = 0; 6676 } 6677 if ((stcb->asoc.pktdrop_supported == 1) && 6678 (peer_supports_pktdrop == 0)) { 6679 stcb->asoc.pktdrop_supported = 0; 6680 } 6681 /* validate authentication required parameters */ 6682 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6683 /* peer does not support auth but sent a chunks list? */ 6684 return (-31); 6685 } 6686 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6687 /* peer supports asconf but not auth? */ 6688 return (-32); 6689 } else if ((peer_supports_asconf == 1) && 6690 (peer_supports_auth == 1) && 6691 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6692 return (-33); 6693 } 6694 /* concatenate the full random key */ 6695 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6696 if (chunks != NULL) { 6697 keylen += sizeof(*chunks) + num_chunks; 6698 } 6699 new_key = sctp_alloc_key(keylen); 6700 if (new_key != NULL) { 6701 /* copy in the RANDOM */ 6702 if (p_random != NULL) { 6703 keylen = sizeof(*p_random) + random_len; 6704 memcpy(new_key->key, p_random, keylen); 6705 } 6706 /* append in the AUTH chunks */ 6707 if (chunks != NULL) { 6708 memcpy(new_key->key + keylen, chunks, 6709 sizeof(*chunks) + num_chunks); 6710 keylen += sizeof(*chunks) + num_chunks; 6711 } 6712 /* append in the HMACs */ 6713 if (hmacs != NULL) { 6714 memcpy(new_key->key + keylen, hmacs, 6715 sizeof(*hmacs) + hmacs_len); 6716 } 6717 } else { 6718 /* failed to get memory for the key */ 6719 return (-34); 6720 } 6721 if (stcb->asoc.authinfo.peer_random != NULL) 6722 sctp_free_key(stcb->asoc.authinfo.peer_random); 6723 stcb->asoc.authinfo.peer_random = new_key; 6724 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6725 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6726 6727 return (0); 6728 } 6729 6730 int 6731 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6732 struct sctp_nets *net) 6733 { 6734 /* make sure the requested primary address exists in the assoc */ 6735 if (net == NULL && sa) 6736 net = sctp_findnet(stcb, sa); 6737 6738 if (net == NULL) { 6739 /* didn't find the requested primary address! */ 6740 return (-1); 6741 } else { 6742 /* set the primary address */ 6743 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6744 /* Must be confirmed, so queue to set */ 6745 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6746 return (0); 6747 } 6748 stcb->asoc.primary_destination = net; 6749 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6750 sctp_free_remote_addr(stcb->asoc.alternate); 6751 stcb->asoc.alternate = NULL; 6752 } 6753 net = TAILQ_FIRST(&stcb->asoc.nets); 6754 if (net != stcb->asoc.primary_destination) { 6755 /* 6756 * first one on the list is NOT the primary 6757 * sctp_cmpaddr() is much more efficient if the 6758 * primary is the first on the list, make it so. 6759 */ 6760 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6761 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6762 } 6763 return (0); 6764 } 6765 } 6766 6767 int 6768 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6769 { 6770 /* 6771 * This function serves two purposes. It will see if a TAG can be 6772 * re-used and return 1 for yes it is ok and 0 for don't use that 6773 * tag. A secondary function it will do is purge out old tags that 6774 * can be removed. 6775 */ 6776 struct sctpvtaghead *chain; 6777 struct sctp_tagblock *twait_block; 6778 struct sctpasochead *head; 6779 struct sctp_tcb *stcb; 6780 int i; 6781 6782 SCTP_INP_INFO_RLOCK(); 6783 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6784 SCTP_BASE_INFO(hashasocmark))]; 6785 LIST_FOREACH(stcb, head, sctp_asocs) { 6786 /* 6787 * We choose not to lock anything here. TCB's can't be 6788 * removed since we have the read lock, so they can't be 6789 * freed on us, same thing for the INP. I may be wrong with 6790 * this assumption, but we will go with it for now :-) 6791 */ 6792 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6793 continue; 6794 } 6795 if (stcb->asoc.my_vtag == tag) { 6796 /* candidate */ 6797 if (stcb->rport != rport) { 6798 continue; 6799 } 6800 if (stcb->sctp_ep->sctp_lport != lport) { 6801 continue; 6802 } 6803 /* Its a used tag set */ 6804 SCTP_INP_INFO_RUNLOCK(); 6805 return (0); 6806 } 6807 } 6808 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6809 /* Now what about timed wait ? */ 6810 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6811 /* 6812 * Block(s) are present, lets see if we have this tag in the 6813 * list 6814 */ 6815 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6816 if (twait_block->vtag_block[i].v_tag == 0) { 6817 /* not used */ 6818 continue; 6819 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6820 now->tv_sec) { 6821 /* Audit expires this guy */ 6822 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6823 twait_block->vtag_block[i].v_tag = 0; 6824 twait_block->vtag_block[i].lport = 0; 6825 twait_block->vtag_block[i].rport = 0; 6826 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6827 (twait_block->vtag_block[i].lport == lport) && 6828 (twait_block->vtag_block[i].rport == rport)) { 6829 /* Bad tag, sorry :< */ 6830 SCTP_INP_INFO_RUNLOCK(); 6831 return (0); 6832 } 6833 } 6834 } 6835 SCTP_INP_INFO_RUNLOCK(); 6836 return (1); 6837 } 6838 6839 static void 6840 sctp_drain_mbufs(struct sctp_tcb *stcb) 6841 { 6842 /* 6843 * We must hunt this association for MBUF's past the cumack (i.e. 6844 * out of order data that we can renege on). 6845 */ 6846 struct sctp_association *asoc; 6847 struct sctp_tmit_chunk *chk, *nchk; 6848 uint32_t cumulative_tsn_p1; 6849 struct sctp_queued_to_read *control, *ncontrol; 6850 int cnt, strmat; 6851 uint32_t gap, i; 6852 int fnd = 0; 6853 6854 /* We look for anything larger than the cum-ack + 1 */ 6855 6856 asoc = &stcb->asoc; 6857 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6858 /* none we can reneg on. */ 6859 return; 6860 } 6861 SCTP_STAT_INCR(sctps_protocol_drains_done); 6862 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6863 cnt = 0; 6864 /* Ok that was fun, now we will drain all the inbound streams? */ 6865 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6866 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].inqueue, next_instrm, ncontrol) { 6867 #ifdef INVARIANTS 6868 if (control->on_strm_q != SCTP_ON_ORDERED) { 6869 panic("Huh control: %p on_q: %d -- not ordered?", 6870 control, control->on_strm_q); 6871 } 6872 #endif 6873 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6874 /* Yep it is above cum-ack */ 6875 cnt++; 6876 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6877 KASSERT(control->length > 0, ("control has zero length")); 6878 if (asoc->size_on_all_streams >= control->length) { 6879 asoc->size_on_all_streams -= control->length; 6880 } else { 6881 #ifdef INVARIANTS 6882 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6883 #else 6884 asoc->size_on_all_streams = 0; 6885 #endif 6886 } 6887 sctp_ucount_decr(asoc->cnt_on_all_streams); 6888 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6889 if (control->on_read_q) { 6890 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6891 control->on_read_q = 0; 6892 } 6893 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, control, next_instrm); 6894 control->on_strm_q = 0; 6895 if (control->data) { 6896 sctp_m_freem(control->data); 6897 control->data = NULL; 6898 } 6899 sctp_free_remote_addr(control->whoFrom); 6900 /* Now its reasm? */ 6901 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6902 cnt++; 6903 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6904 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6905 if (asoc->size_on_reasm_queue >= chk->send_size) { 6906 asoc->size_on_reasm_queue -= chk->send_size; 6907 } else { 6908 #ifdef INVARIANTS 6909 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6910 #else 6911 asoc->size_on_reasm_queue = 0; 6912 #endif 6913 } 6914 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6915 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6916 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6917 if (chk->data) { 6918 sctp_m_freem(chk->data); 6919 chk->data = NULL; 6920 } 6921 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6922 } 6923 sctp_free_a_readq(stcb, control); 6924 } 6925 } 6926 TAILQ_FOREACH_SAFE(control, &asoc->strmin[strmat].uno_inqueue, next_instrm, ncontrol) { 6927 #ifdef INVARIANTS 6928 if (control->on_strm_q != SCTP_ON_UNORDERED) { 6929 panic("Huh control: %p on_q: %d -- not unordered?", 6930 control, control->on_strm_q); 6931 } 6932 #endif 6933 if (SCTP_TSN_GT(control->sinfo_tsn, cumulative_tsn_p1)) { 6934 /* Yep it is above cum-ack */ 6935 cnt++; 6936 SCTP_CALC_TSN_TO_GAP(gap, control->sinfo_tsn, asoc->mapping_array_base_tsn); 6937 KASSERT(control->length > 0, ("control has zero length")); 6938 if (asoc->size_on_all_streams >= control->length) { 6939 asoc->size_on_all_streams -= control->length; 6940 } else { 6941 #ifdef INVARIANTS 6942 panic("size_on_all_streams = %u smaller than control length %u", asoc->size_on_all_streams, control->length); 6943 #else 6944 asoc->size_on_all_streams = 0; 6945 #endif 6946 } 6947 sctp_ucount_decr(asoc->cnt_on_all_streams); 6948 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6949 if (control->on_read_q) { 6950 TAILQ_REMOVE(&stcb->sctp_ep->read_queue, control, next); 6951 control->on_read_q = 0; 6952 } 6953 TAILQ_REMOVE(&asoc->strmin[strmat].uno_inqueue, control, next_instrm); 6954 control->on_strm_q = 0; 6955 if (control->data) { 6956 sctp_m_freem(control->data); 6957 control->data = NULL; 6958 } 6959 sctp_free_remote_addr(control->whoFrom); 6960 /* Now its reasm? */ 6961 TAILQ_FOREACH_SAFE(chk, &control->reasm, sctp_next, nchk) { 6962 cnt++; 6963 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.tsn, asoc->mapping_array_base_tsn); 6964 KASSERT(chk->send_size > 0, ("chunk has zero length")); 6965 if (asoc->size_on_reasm_queue >= chk->send_size) { 6966 asoc->size_on_reasm_queue -= chk->send_size; 6967 } else { 6968 #ifdef INVARIANTS 6969 panic("size_on_reasm_queue = %u smaller than chunk length %u", asoc->size_on_reasm_queue, chk->send_size); 6970 #else 6971 asoc->size_on_reasm_queue = 0; 6972 #endif 6973 } 6974 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6975 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6976 TAILQ_REMOVE(&control->reasm, chk, sctp_next); 6977 if (chk->data) { 6978 sctp_m_freem(chk->data); 6979 chk->data = NULL; 6980 } 6981 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6982 } 6983 sctp_free_a_readq(stcb, control); 6984 } 6985 } 6986 } 6987 if (cnt) { 6988 /* We must back down to see what the new highest is */ 6989 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6990 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6991 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6992 asoc->highest_tsn_inside_map = i; 6993 fnd = 1; 6994 break; 6995 } 6996 } 6997 if (!fnd) { 6998 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6999 } 7000 /* 7001 * Question, should we go through the delivery queue? The 7002 * only reason things are on here is the app not reading OR 7003 * a p-d-api up. An attacker COULD send enough in to 7004 * initiate the PD-API and then send a bunch of stuff to 7005 * other streams... these would wind up on the delivery 7006 * queue.. and then we would not get to them. But in order 7007 * to do this I then have to back-track and un-deliver 7008 * sequence numbers in streams.. el-yucko. I think for now 7009 * we will NOT look at the delivery queue and leave it to be 7010 * something to consider later. An alternative would be to 7011 * abort the P-D-API with a notification and then deliver 7012 * the data.... Or another method might be to keep track of 7013 * how many times the situation occurs and if we see a 7014 * possible attack underway just abort the association. 7015 */ 7016 #ifdef SCTP_DEBUG 7017 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 7018 #endif 7019 /* 7020 * Now do we need to find a new 7021 * asoc->highest_tsn_inside_map? 7022 */ 7023 asoc->last_revoke_count = cnt; 7024 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 7025 /* sa_ignore NO_NULL_CHK */ 7026 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 7027 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 7028 } 7029 /* 7030 * Another issue, in un-setting the TSN's in the mapping array we 7031 * DID NOT adjust the highest_tsn marker. This will cause one of 7032 * two things to occur. It may cause us to do extra work in checking 7033 * for our mapping array movement. More importantly it may cause us 7034 * to SACK every datagram. This may not be a bad thing though since 7035 * we will recover once we get our cum-ack above and all this stuff 7036 * we dumped recovered. 7037 */ 7038 } 7039 7040 void 7041 sctp_drain() 7042 { 7043 /* 7044 * We must walk the PCB lists for ALL associations here. The system 7045 * is LOW on MBUF's and needs help. This is where reneging will 7046 * occur. We really hope this does NOT happen! 7047 */ 7048 VNET_ITERATOR_DECL(vnet_iter); 7049 VNET_LIST_RLOCK_NOSLEEP(); 7050 VNET_FOREACH(vnet_iter) { 7051 CURVNET_SET(vnet_iter); 7052 struct sctp_inpcb *inp; 7053 struct sctp_tcb *stcb; 7054 7055 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7056 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7057 #ifdef VIMAGE 7058 continue; 7059 #else 7060 return; 7061 #endif 7062 } 7063 SCTP_INP_INFO_RLOCK(); 7064 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7065 /* For each endpoint */ 7066 SCTP_INP_RLOCK(inp); 7067 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7068 /* For each association */ 7069 SCTP_TCB_LOCK(stcb); 7070 sctp_drain_mbufs(stcb); 7071 SCTP_TCB_UNLOCK(stcb); 7072 } 7073 SCTP_INP_RUNLOCK(inp); 7074 } 7075 SCTP_INP_INFO_RUNLOCK(); 7076 CURVNET_RESTORE(); 7077 } 7078 VNET_LIST_RUNLOCK_NOSLEEP(); 7079 } 7080 7081 /* 7082 * start a new iterator 7083 * iterates through all endpoints and associations based on the pcb_state 7084 * flags and asoc_state. "af" (mandatory) is executed for all matching 7085 * assocs and "ef" (optional) is executed when the iterator completes. 7086 * "inpf" (optional) is executed for each new endpoint as it is being 7087 * iterated through. inpe (optional) is called when the inp completes 7088 * its way through all the stcbs. 7089 */ 7090 int 7091 sctp_initiate_iterator(inp_func inpf, 7092 asoc_func af, 7093 inp_func inpe, 7094 uint32_t pcb_state, 7095 uint32_t pcb_features, 7096 uint32_t asoc_state, 7097 void *argp, 7098 uint32_t argi, 7099 end_func ef, 7100 struct sctp_inpcb *s_inp, 7101 uint8_t chunk_output_off) 7102 { 7103 struct sctp_iterator *it = NULL; 7104 7105 if (af == NULL) { 7106 return (-1); 7107 } 7108 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7109 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7110 SCTP_BASE_VAR(sctp_pcb_initialized)); 7111 return (-1); 7112 } 7113 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7114 SCTP_M_ITER); 7115 if (it == NULL) { 7116 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7117 return (ENOMEM); 7118 } 7119 memset(it, 0, sizeof(*it)); 7120 it->function_assoc = af; 7121 it->function_inp = inpf; 7122 if (inpf) 7123 it->done_current_ep = 0; 7124 else 7125 it->done_current_ep = 1; 7126 it->function_atend = ef; 7127 it->pointer = argp; 7128 it->val = argi; 7129 it->pcb_flags = pcb_state; 7130 it->pcb_features = pcb_features; 7131 it->asoc_state = asoc_state; 7132 it->function_inp_end = inpe; 7133 it->no_chunk_output = chunk_output_off; 7134 it->vn = curvnet; 7135 if (s_inp) { 7136 /* Assume lock is held here */ 7137 it->inp = s_inp; 7138 SCTP_INP_INCR_REF(it->inp); 7139 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7140 } else { 7141 SCTP_INP_INFO_RLOCK(); 7142 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7143 if (it->inp) { 7144 SCTP_INP_INCR_REF(it->inp); 7145 } 7146 SCTP_INP_INFO_RUNLOCK(); 7147 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7148 7149 } 7150 SCTP_IPI_ITERATOR_WQ_LOCK(); 7151 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7152 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7153 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7154 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7155 SCTP_FREE(it, SCTP_M_ITER); 7156 return (-1); 7157 } 7158 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7159 if (sctp_it_ctl.iterator_running == 0) { 7160 sctp_wakeup_iterator(); 7161 } 7162 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7163 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7164 return (0); 7165 } 7166