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 81 #endif 82 83 void 84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85 { 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 SCTP_INP_INFO_RUNLOCK(); 100 } 101 102 /*- 103 * Addresses are added to VRF's (Virtual Router's). For BSD we 104 * have only the default VRF 0. We maintain a hash list of 105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 106 * these has a list of addresses. When we add a new address 107 * to a VRF we lookup the ifn/ifn_index, if the ifn does 108 * not exist we create it and add it to the list of IFN's 109 * within the VRF. Once we have the sctp_ifn, we add the 110 * address to the list. So we look something like: 111 * 112 * hash-vrf-table 113 * vrf-> ifn-> ifn -> ifn 114 * vrf | 115 * ... +--ifa-> ifa -> ifa 116 * vrf 117 * 118 * We keep these separate lists since the SCTP subsystem will 119 * point to these from its source address selection nets structure. 120 * When an address is deleted it does not happen right away on 121 * the SCTP side, it gets scheduled. What we do when a 122 * delete happens is immediately remove the address from 123 * the master list and decrement the refcount. As our 124 * addip iterator works through and frees the src address 125 * selection pointing to the sctp_ifa, eventually the refcount 126 * will reach 0 and we will delete it. Note that it is assumed 127 * that any locking on system level ifn/ifa is done at the 128 * caller of these functions and these routines will only 129 * lock the SCTP structures as they add or delete things. 130 * 131 * Other notes on VRF concepts. 132 * - An endpoint can be in multiple VRF's 133 * - An association lives within a VRF and only one VRF. 134 * - Any incoming packet we can deduce the VRF for by 135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 136 * - Any downward send call or connect call must supply the 137 * VRF via ancillary data or via some sort of set default 138 * VRF socket option call (again for BSD no brainer since 139 * the VRF is always 0). 140 * - An endpoint may add multiple VRF's to it. 141 * - Listening sockets can accept associations in any 142 * of the VRF's they are in but the assoc will end up 143 * in only one VRF (gotten from the packet or connect/send). 144 * 145 */ 146 147 struct sctp_vrf * 148 sctp_allocate_vrf(int vrf_id) 149 { 150 struct sctp_vrf *vrf = NULL; 151 struct sctp_vrflist *bucket; 152 153 /* First allocate the VRF structure */ 154 vrf = sctp_find_vrf(vrf_id); 155 if (vrf) { 156 /* Already allocated */ 157 return (vrf); 158 } 159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 160 SCTP_M_VRF); 161 if (vrf == NULL) { 162 /* No memory */ 163 #ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165 #endif 166 return (NULL); 167 } 168 /* setup the VRF */ 169 memset(vrf, 0, sizeof(struct sctp_vrf)); 170 vrf->vrf_id = vrf_id; 171 LIST_INIT(&vrf->ifnlist); 172 vrf->total_ifa_count = 0; 173 vrf->refcount = 0; 174 /* now also setup table ids */ 175 SCTP_INIT_VRF_TABLEID(vrf); 176 /* Init the HASH of addresses */ 177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 178 &vrf->vrf_addr_hashmark); 179 if (vrf->vrf_addr_hash == NULL) { 180 /* No memory */ 181 #ifdef INVARIANTS 182 panic("No memory for VRF:%d", vrf_id); 183 #endif 184 SCTP_FREE(vrf, SCTP_M_VRF); 185 return (NULL); 186 } 187 /* Add it to the hash table */ 188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 189 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 191 return (vrf); 192 } 193 194 195 struct sctp_ifn * 196 sctp_find_ifn(void *ifn, uint32_t ifn_index) 197 { 198 struct sctp_ifn *sctp_ifnp; 199 struct sctp_ifnlist *hash_ifn_head; 200 201 /* 202 * We assume the lock is held for the addresses if that's wrong 203 * problems could occur :-) 204 */ 205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 207 if (sctp_ifnp->ifn_index == ifn_index) { 208 return (sctp_ifnp); 209 } 210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 211 return (sctp_ifnp); 212 } 213 } 214 return (NULL); 215 } 216 217 218 struct sctp_vrf * 219 sctp_find_vrf(uint32_t vrf_id) 220 { 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231 } 232 233 234 void 235 sctp_free_vrf(struct sctp_vrf *vrf) 236 { 237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 238 if (vrf->vrf_addr_hash) { 239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 240 vrf->vrf_addr_hash = NULL; 241 } 242 /* We zero'd the count */ 243 LIST_REMOVE(vrf, next_vrf); 244 SCTP_FREE(vrf, SCTP_M_VRF); 245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 246 } 247 } 248 249 250 void 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252 { 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261 } 262 263 264 void 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 266 { 267 struct sctp_ifn *sctp_ifnp; 268 269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 270 if (sctp_ifnp != NULL) { 271 sctp_ifnp->ifn_mtu = mtu; 272 } 273 } 274 275 276 void 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 278 { 279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 280 /* We zero'd the count */ 281 if (sctp_ifap->ifn_p) { 282 sctp_free_ifn(sctp_ifap->ifn_p); 283 } 284 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 286 } 287 } 288 289 290 static void 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 292 { 293 struct sctp_ifn *found; 294 295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 296 if (found == NULL) { 297 /* Not in the list.. sorry */ 298 return; 299 } 300 if (hold_addr_lock == 0) 301 SCTP_IPI_ADDR_WLOCK(); 302 LIST_REMOVE(sctp_ifnp, next_bucket); 303 LIST_REMOVE(sctp_ifnp, next_ifn); 304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 305 sctp_ifnp->registered_af); 306 if (hold_addr_lock == 0) 307 SCTP_IPI_ADDR_WUNLOCK(); 308 /* Take away the reference, and possibly free it */ 309 sctp_free_ifn(sctp_ifnp); 310 } 311 312 313 void 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 315 const char *if_name, uint32_t ifn_index) 316 { 317 struct sctp_vrf *vrf; 318 struct sctp_ifa *sctp_ifap; 319 320 SCTP_IPI_ADDR_RLOCK(); 321 vrf = sctp_find_vrf(vrf_id); 322 if (vrf == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 324 goto out; 325 326 } 327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 328 if (sctp_ifap == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 330 goto out; 331 } 332 if (sctp_ifap->ifn_p == NULL) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 334 goto out; 335 } 336 if (if_name) { 337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 339 sctp_ifap->ifn_p->ifn_name, if_name); 340 goto out; 341 } 342 } else { 343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 345 sctp_ifap->ifn_p->ifn_index, ifn_index); 346 goto out; 347 } 348 } 349 350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 352 out: 353 SCTP_IPI_ADDR_RUNLOCK(); 354 } 355 356 357 void 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 359 const char *if_name, uint32_t ifn_index) 360 { 361 struct sctp_vrf *vrf; 362 struct sctp_ifa *sctp_ifap; 363 364 SCTP_IPI_ADDR_RLOCK(); 365 vrf = sctp_find_vrf(vrf_id); 366 if (vrf == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 368 goto out; 369 370 } 371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 372 if (sctp_ifap == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 374 goto out; 375 } 376 if (sctp_ifap->ifn_p == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 378 goto out; 379 } 380 if (if_name) { 381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 383 sctp_ifap->ifn_p->ifn_name, if_name); 384 goto out; 385 } 386 } else { 387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 389 sctp_ifap->ifn_p->ifn_index, ifn_index); 390 goto out; 391 } 392 } 393 394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 396 out: 397 SCTP_IPI_ADDR_RUNLOCK(); 398 } 399 400 401 /*- 402 * Add an ifa to an ifn. 403 * Register the interface as necessary. 404 * NOTE: ADDR write lock MUST be held. 405 */ 406 static void 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 408 { 409 int ifa_af; 410 411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 412 sctp_ifap->ifn_p = sctp_ifnp; 413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 414 /* update address counts */ 415 sctp_ifnp->ifa_count++; 416 ifa_af = sctp_ifap->address.sa.sa_family; 417 switch (ifa_af) { 418 #ifdef INET 419 case AF_INET: 420 sctp_ifnp->num_v4++; 421 break; 422 #endif 423 #ifdef INET6 424 case AF_INET6: 425 sctp_ifnp->num_v6++; 426 break; 427 #endif 428 default: 429 break; 430 } 431 if (sctp_ifnp->ifa_count == 1) { 432 /* register the new interface */ 433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 434 sctp_ifnp->registered_af = ifa_af; 435 } 436 } 437 438 439 /*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445 static void 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447 { 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453 #ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457 #endif 458 #ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462 #endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 476 sctp_ifap->ifn_p->registered_af = AF_INET; 477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 478 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 481 sctp_ifap->ifn_p->registered_af = AF_INET6; 482 } 483 /* free the ifn refcount */ 484 sctp_free_ifn(sctp_ifap->ifn_p); 485 } 486 sctp_ifap->ifn_p = NULL; 487 } 488 } 489 490 491 struct sctp_ifa * 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 493 uint32_t ifn_type, const char *if_name, void *ifa, 494 struct sockaddr *addr, uint32_t ifa_flags, 495 int dynamic_add) 496 { 497 struct sctp_vrf *vrf; 498 struct sctp_ifn *sctp_ifnp = NULL; 499 struct sctp_ifa *sctp_ifap = NULL; 500 struct sctp_ifalist *hash_addr_head; 501 struct sctp_ifnlist *hash_ifn_head; 502 uint32_t hash_of_addr; 503 int new_ifn_af = 0; 504 505 #ifdef SCTP_DEBUG 506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 508 #endif 509 SCTP_IPI_ADDR_WLOCK(); 510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 511 if (sctp_ifnp) { 512 vrf = sctp_ifnp->vrf; 513 } else { 514 vrf = sctp_find_vrf(vrf_id); 515 if (vrf == NULL) { 516 vrf = sctp_allocate_vrf(vrf_id); 517 if (vrf == NULL) { 518 SCTP_IPI_ADDR_WUNLOCK(); 519 return (NULL); 520 } 521 } 522 } 523 if (sctp_ifnp == NULL) { 524 /* 525 * build one and add it, can't hold lock until after malloc 526 * done though. 527 */ 528 SCTP_IPI_ADDR_WUNLOCK(); 529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 530 sizeof(struct sctp_ifn), SCTP_M_IFN); 531 if (sctp_ifnp == NULL) { 532 #ifdef INVARIANTS 533 panic("No memory for IFN"); 534 #endif 535 return (NULL); 536 } 537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 538 sctp_ifnp->ifn_index = ifn_index; 539 sctp_ifnp->ifn_p = ifn; 540 sctp_ifnp->ifn_type = ifn_type; 541 sctp_ifnp->refcount = 0; 542 sctp_ifnp->vrf = vrf; 543 atomic_add_int(&vrf->refcount, 1); 544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 545 if (if_name != NULL) { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 547 } else { 548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 549 } 550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 551 LIST_INIT(&sctp_ifnp->ifalist); 552 SCTP_IPI_ADDR_WLOCK(); 553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 556 new_ifn_af = 1; 557 } 558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 559 if (sctp_ifap) { 560 /* Hmm, it already exists? */ 561 if ((sctp_ifap->ifn_p) && 562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 564 sctp_ifap->ifn_p->ifn_name, ifn_index, 565 (void *)sctp_ifap); 566 if (new_ifn_af) { 567 /* Remove the created one that we don't want */ 568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 569 } 570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 571 /* easy to solve, just switch back to active */ 572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 574 sctp_ifap->ifn_p = sctp_ifnp; 575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 576 } 577 exit_stage_left: 578 SCTP_IPI_ADDR_WUNLOCK(); 579 return (sctp_ifap); 580 } else { 581 if (sctp_ifap->ifn_p) { 582 /* 583 * The last IFN gets the address, remove the 584 * old one 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 588 sctp_ifap->ifn_p->ifn_index, if_name, 589 ifn_index); 590 /* remove the address from the old ifn */ 591 sctp_remove_ifa_from_ifn(sctp_ifap); 592 /* move the address over to the new ifn */ 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 goto exit_stage_left; 595 } else { 596 /* repair ifnp which was NULL ? */ 597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 599 (void *)sctp_ifnp, (void *)sctp_ifap); 600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 601 } 602 goto exit_stage_left; 603 } 604 } 605 SCTP_IPI_ADDR_WUNLOCK(); 606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 607 if (sctp_ifap == NULL) { 608 #ifdef INVARIANTS 609 panic("No memory for IFA"); 610 #endif 611 return (NULL); 612 } 613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 614 sctp_ifap->ifn_p = sctp_ifnp; 615 atomic_add_int(&sctp_ifnp->refcount, 1); 616 sctp_ifap->vrf_id = vrf_id; 617 sctp_ifap->ifa = ifa; 618 memcpy(&sctp_ifap->address, addr, addr->sa_len); 619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 620 sctp_ifap->flags = ifa_flags; 621 /* Set scope */ 622 switch (sctp_ifap->address.sa.sa_family) { 623 #ifdef INET 624 case AF_INET: 625 { 626 struct sockaddr_in *sin; 627 628 sin = &sctp_ifap->address.sin; 629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 631 sctp_ifap->src_is_loop = 1; 632 } 633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 634 sctp_ifap->src_is_priv = 1; 635 } 636 sctp_ifnp->num_v4++; 637 if (new_ifn_af) 638 new_ifn_af = AF_INET; 639 break; 640 } 641 #endif 642 #ifdef INET6 643 case AF_INET6: 644 { 645 /* ok to use deprecated addresses? */ 646 struct sockaddr_in6 *sin6; 647 648 sin6 = &sctp_ifap->address.sin6; 649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 651 sctp_ifap->src_is_loop = 1; 652 } 653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 654 sctp_ifap->src_is_priv = 1; 655 } 656 sctp_ifnp->num_v6++; 657 if (new_ifn_af) 658 new_ifn_af = AF_INET6; 659 break; 660 } 661 #endif 662 default: 663 new_ifn_af = 0; 664 break; 665 } 666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 667 668 if ((sctp_ifap->src_is_priv == 0) && 669 (sctp_ifap->src_is_loop == 0)) { 670 sctp_ifap->src_is_glob = 1; 671 } 672 SCTP_IPI_ADDR_WLOCK(); 673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 675 sctp_ifap->refcount = 1; 676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 677 sctp_ifnp->ifa_count++; 678 vrf->total_ifa_count++; 679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 680 if (new_ifn_af) { 681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 682 sctp_ifnp->registered_af = new_ifn_af; 683 } 684 SCTP_IPI_ADDR_WUNLOCK(); 685 if (dynamic_add) { 686 /* 687 * Bump up the refcount so that when the timer completes it 688 * will drop back down. 689 */ 690 struct sctp_laddr *wi; 691 692 atomic_add_int(&sctp_ifap->refcount, 1); 693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 694 if (wi == NULL) { 695 /* 696 * Gak, what can we do? We have lost an address 697 * change can you say HOSED? 698 */ 699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 700 /* Opps, must decrement the count */ 701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 702 if_name); 703 return (NULL); 704 } 705 SCTP_INCR_LADDR_COUNT(); 706 bzero(wi, sizeof(*wi)); 707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 708 wi->ifa = sctp_ifap; 709 wi->action = SCTP_ADD_IP_ADDRESS; 710 711 SCTP_WQ_ADDR_LOCK(); 712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 713 SCTP_WQ_ADDR_UNLOCK(); 714 715 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 716 (struct sctp_inpcb *)NULL, 717 (struct sctp_tcb *)NULL, 718 (struct sctp_nets *)NULL); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724 } 725 726 void 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729 { 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739 #ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742 #endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. We do this especially for 752 * panda who might recycle indexes fast. 753 */ 754 if (if_name) { 755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 756 /* They match its a correct delete */ 757 valid = 1; 758 } 759 } 760 if (!valid) { 761 /* last ditch check ifn_index */ 762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 763 valid = 1; 764 } 765 } 766 if (!valid) { 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 768 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 771 SCTP_IPI_ADDR_WUNLOCK(); 772 return; 773 } 774 } 775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 777 /* 778 * We don't set the flag. This means that the structure will 779 * hang around in EP's that have bound specific to it until 780 * they close. This gives us TCP like behavior if someone 781 * removes an address (or for that matter adds it right 782 * back). 783 */ 784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 785 vrf->total_ifa_count--; 786 LIST_REMOVE(sctp_ifap, next_bucket); 787 sctp_remove_ifa_from_ifn(sctp_ifap); 788 } 789 #ifdef SCTP_DEBUG 790 else { 791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 792 ifn_index); 793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 794 } 795 #endif 796 797 out_now: 798 SCTP_IPI_ADDR_WUNLOCK(); 799 if (sctp_ifap) { 800 struct sctp_laddr *wi; 801 802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 803 if (wi == NULL) { 804 /* 805 * Gak, what can we do? We have lost an address 806 * change can you say HOSED? 807 */ 808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 809 810 /* Oops, must decrement the count */ 811 sctp_free_ifa(sctp_ifap); 812 return; 813 } 814 SCTP_INCR_LADDR_COUNT(); 815 bzero(wi, sizeof(*wi)); 816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 817 wi->ifa = sctp_ifap; 818 wi->action = SCTP_DEL_IP_ADDRESS; 819 SCTP_WQ_ADDR_LOCK(); 820 /* 821 * Should this really be a tailq? As it is we will process 822 * the newest first :-0 823 */ 824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 825 SCTP_WQ_ADDR_UNLOCK(); 826 827 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 828 (struct sctp_inpcb *)NULL, 829 (struct sctp_tcb *)NULL, 830 (struct sctp_nets *)NULL); 831 } 832 return; 833 } 834 835 836 static int 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 838 { 839 int loopback_scope; 840 841 #if defined(INET) 842 int ipv4_local_scope, ipv4_addr_legal; 843 844 #endif 845 #if defined(INET6) 846 int local_scope, site_scope, ipv6_addr_legal; 847 848 #endif 849 struct sctp_vrf *vrf; 850 struct sctp_ifn *sctp_ifn; 851 struct sctp_ifa *sctp_ifa; 852 853 loopback_scope = stcb->asoc.scope.loopback_scope; 854 #if defined(INET) 855 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 856 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 857 #endif 858 #if defined(INET6) 859 local_scope = stcb->asoc.scope.local_scope; 860 site_scope = stcb->asoc.scope.site_scope; 861 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 862 #endif 863 864 SCTP_IPI_ADDR_RLOCK(); 865 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 866 if (vrf == NULL) { 867 /* no vrf, no addresses */ 868 SCTP_IPI_ADDR_RUNLOCK(); 869 return (0); 870 } 871 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 872 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 873 if ((loopback_scope == 0) && 874 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 875 continue; 876 } 877 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 878 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 879 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 880 /* 881 * We allow pending addresses, where 882 * we have sent an asconf-add to be 883 * considered valid. 884 */ 885 continue; 886 } 887 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 888 continue; 889 } 890 switch (sctp_ifa->address.sa.sa_family) { 891 #ifdef INET 892 case AF_INET: 893 if (ipv4_addr_legal) { 894 struct sockaddr_in *sin, 895 *rsin; 896 897 sin = &sctp_ifa->address.sin; 898 rsin = (struct sockaddr_in *)to; 899 if ((ipv4_local_scope == 0) && 900 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 901 continue; 902 } 903 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 904 &sin->sin_addr) != 0) { 905 continue; 906 } 907 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 908 SCTP_IPI_ADDR_RUNLOCK(); 909 return (1); 910 } 911 } 912 break; 913 #endif 914 #ifdef INET6 915 case AF_INET6: 916 if (ipv6_addr_legal) { 917 struct sockaddr_in6 *sin6, 918 *rsin6; 919 920 sin6 = &sctp_ifa->address.sin6; 921 rsin6 = (struct sockaddr_in6 *)to; 922 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 923 &sin6->sin6_addr) != 0) { 924 continue; 925 } 926 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 927 if (local_scope == 0) 928 continue; 929 if (sin6->sin6_scope_id == 0) { 930 if (sa6_recoverscope(sin6) != 0) 931 continue; 932 } 933 } 934 if ((site_scope == 0) && 935 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 936 continue; 937 } 938 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 939 SCTP_IPI_ADDR_RUNLOCK(); 940 return (1); 941 } 942 } 943 break; 944 #endif 945 default: 946 /* TSNH */ 947 break; 948 } 949 } 950 } 951 } else { 952 struct sctp_laddr *laddr; 953 954 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 955 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 956 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 957 continue; 958 } 959 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 960 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 961 /* 962 * We allow pending addresses, where we have 963 * sent an asconf-add to be considered 964 * valid. 965 */ 966 continue; 967 } 968 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 969 continue; 970 } 971 switch (to->sa_family) { 972 #ifdef INET 973 case AF_INET: 974 { 975 struct sockaddr_in *sin, *rsin; 976 977 sin = &laddr->ifa->address.sin; 978 rsin = (struct sockaddr_in *)to; 979 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 980 SCTP_IPI_ADDR_RUNLOCK(); 981 return (1); 982 } 983 break; 984 } 985 #endif 986 #ifdef INET6 987 case AF_INET6: 988 { 989 struct sockaddr_in6 *sin6, *rsin6; 990 991 sin6 = &laddr->ifa->address.sin6; 992 rsin6 = (struct sockaddr_in6 *)to; 993 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (1); 996 } 997 break; 998 } 999 1000 #endif 1001 default: 1002 /* TSNH */ 1003 break; 1004 } 1005 1006 } 1007 } 1008 SCTP_IPI_ADDR_RUNLOCK(); 1009 return (0); 1010 } 1011 1012 1013 static struct sctp_tcb * 1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1015 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1016 { 1017 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1018 /* 1019 * If we support the TCP model, then we must now dig through to see 1020 * if we can find our endpoint in the list of tcp ep's. 1021 */ 1022 uint16_t lport, rport; 1023 struct sctppcbhead *ephead; 1024 struct sctp_inpcb *inp; 1025 struct sctp_laddr *laddr; 1026 struct sctp_tcb *stcb; 1027 struct sctp_nets *net; 1028 1029 if ((to == NULL) || (from == NULL)) { 1030 return (NULL); 1031 } 1032 switch (to->sa_family) { 1033 #ifdef INET 1034 case AF_INET: 1035 if (from->sa_family == AF_INET) { 1036 lport = ((struct sockaddr_in *)to)->sin_port; 1037 rport = ((struct sockaddr_in *)from)->sin_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042 #endif 1043 #ifdef INET6 1044 case AF_INET6: 1045 if (from->sa_family == AF_INET6) { 1046 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1047 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1048 } else { 1049 return (NULL); 1050 } 1051 break; 1052 #endif 1053 default: 1054 return (NULL); 1055 } 1056 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1057 /* 1058 * Ok now for each of the guys in this bucket we must look and see: 1059 * - Does the remote port match. - Does there single association's 1060 * addresses match this address (to). If so we update p_ep to point 1061 * to this ep and return the tcb from it. 1062 */ 1063 LIST_FOREACH(inp, ephead, sctp_hash) { 1064 SCTP_INP_RLOCK(inp); 1065 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 if (lport != inp->sctp_lport) { 1070 SCTP_INP_RUNLOCK(inp); 1071 continue; 1072 } 1073 switch (to->sa_family) { 1074 #ifdef INET 1075 case AF_INET: 1076 { 1077 struct sockaddr_in *sin; 1078 1079 sin = (struct sockaddr_in *)to; 1080 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1081 &sin->sin_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087 #endif 1088 #ifdef INET6 1089 case AF_INET6: 1090 { 1091 struct sockaddr_in6 *sin6; 1092 1093 sin6 = (struct sockaddr_in6 *)to; 1094 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1095 &sin6->sin6_addr) != 0) { 1096 SCTP_INP_RUNLOCK(inp); 1097 continue; 1098 } 1099 break; 1100 } 1101 #endif 1102 default: 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 if (inp->def_vrf_id != vrf_id) { 1107 SCTP_INP_RUNLOCK(inp); 1108 continue; 1109 } 1110 /* check to see if the ep has one of the addresses */ 1111 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1112 /* We are NOT bound all, so look further */ 1113 int match = 0; 1114 1115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1116 1117 if (laddr->ifa == NULL) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1119 continue; 1120 } 1121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1122 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1123 continue; 1124 } 1125 if (laddr->ifa->address.sa.sa_family == 1126 to->sa_family) { 1127 /* see if it matches */ 1128 #ifdef INET 1129 if (from->sa_family == AF_INET) { 1130 struct sockaddr_in *intf_addr, 1131 *sin; 1132 1133 intf_addr = &laddr->ifa->address.sin; 1134 sin = (struct sockaddr_in *)to; 1135 if (sin->sin_addr.s_addr == 1136 intf_addr->sin_addr.s_addr) { 1137 match = 1; 1138 break; 1139 } 1140 } 1141 #endif 1142 #ifdef INET6 1143 if (from->sa_family == AF_INET6) { 1144 struct sockaddr_in6 *intf_addr6; 1145 struct sockaddr_in6 *sin6; 1146 1147 sin6 = (struct sockaddr_in6 *) 1148 to; 1149 intf_addr6 = &laddr->ifa->address.sin6; 1150 1151 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1152 intf_addr6)) { 1153 match = 1; 1154 break; 1155 } 1156 } 1157 #endif 1158 } 1159 } 1160 if (match == 0) { 1161 /* This endpoint does not have this address */ 1162 SCTP_INP_RUNLOCK(inp); 1163 continue; 1164 } 1165 } 1166 /* 1167 * Ok if we hit here the ep has the address, does it hold 1168 * the tcb? 1169 */ 1170 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1171 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1172 if (stcb == NULL) { 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 SCTP_TCB_LOCK(stcb); 1177 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1178 SCTP_TCB_UNLOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 continue; 1181 } 1182 if (stcb->rport != rport) { 1183 /* remote port does not match. */ 1184 SCTP_TCB_UNLOCK(stcb); 1185 SCTP_INP_RUNLOCK(inp); 1186 continue; 1187 } 1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1189 SCTP_TCB_UNLOCK(stcb); 1190 SCTP_INP_RUNLOCK(inp); 1191 continue; 1192 } 1193 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 continue; 1197 } 1198 /* Does this TCB have a matching address? */ 1199 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1200 1201 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1202 /* not the same family, can't be a match */ 1203 continue; 1204 } 1205 switch (from->sa_family) { 1206 #ifdef INET 1207 case AF_INET: 1208 { 1209 struct sockaddr_in *sin, *rsin; 1210 1211 sin = (struct sockaddr_in *)&net->ro._l_addr; 1212 rsin = (struct sockaddr_in *)from; 1213 if (sin->sin_addr.s_addr == 1214 rsin->sin_addr.s_addr) { 1215 /* found it */ 1216 if (netp != NULL) { 1217 *netp = net; 1218 } 1219 /* 1220 * Update the endpoint 1221 * pointer 1222 */ 1223 *inp_p = inp; 1224 SCTP_INP_RUNLOCK(inp); 1225 return (stcb); 1226 } 1227 break; 1228 } 1229 #endif 1230 #ifdef INET6 1231 case AF_INET6: 1232 { 1233 struct sockaddr_in6 *sin6, *rsin6; 1234 1235 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1236 rsin6 = (struct sockaddr_in6 *)from; 1237 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1238 rsin6)) { 1239 /* found it */ 1240 if (netp != NULL) { 1241 *netp = net; 1242 } 1243 /* 1244 * Update the endpoint 1245 * pointer 1246 */ 1247 *inp_p = inp; 1248 SCTP_INP_RUNLOCK(inp); 1249 return (stcb); 1250 } 1251 break; 1252 } 1253 #endif 1254 default: 1255 /* TSNH */ 1256 break; 1257 } 1258 } 1259 SCTP_TCB_UNLOCK(stcb); 1260 SCTP_INP_RUNLOCK(inp); 1261 } 1262 return (NULL); 1263 } 1264 1265 1266 /* 1267 * rules for use 1268 * 1269 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1270 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1271 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1272 * NULL. 1273 */ 1274 1275 struct sctp_tcb * 1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1277 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1278 { 1279 struct sctpasochead *head; 1280 struct sctp_inpcb *inp; 1281 struct sctp_tcb *stcb = NULL; 1282 struct sctp_nets *net; 1283 uint16_t rport; 1284 1285 inp = *inp_p; 1286 switch (remote->sa_family) { 1287 #ifdef INET 1288 case AF_INET: 1289 rport = (((struct sockaddr_in *)remote)->sin_port); 1290 break; 1291 #endif 1292 #ifdef INET6 1293 case AF_INET6: 1294 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1295 break; 1296 #endif 1297 default: 1298 return (NULL); 1299 } 1300 if (locked_tcb) { 1301 /* 1302 * UN-lock so we can do proper locking here this occurs when 1303 * called from load_addresses_from_init. 1304 */ 1305 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1306 SCTP_TCB_UNLOCK(locked_tcb); 1307 } 1308 SCTP_INP_INFO_RLOCK(); 1309 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1310 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1311 /*- 1312 * Now either this guy is our listener or it's the 1313 * connector. If it is the one that issued the connect, then 1314 * it's only chance is to be the first TCB in the list. If 1315 * it is the acceptor, then do the special_lookup to hash 1316 * and find the real inp. 1317 */ 1318 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1319 /* to is peer addr, from is my addr */ 1320 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1321 netp, inp->def_vrf_id); 1322 if ((stcb != NULL) && (locked_tcb == NULL)) { 1323 /* we have a locked tcb, lower refcount */ 1324 SCTP_INP_DECR_REF(inp); 1325 } 1326 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1327 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1328 SCTP_TCB_LOCK(locked_tcb); 1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1330 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1331 } 1332 SCTP_INP_INFO_RUNLOCK(); 1333 return (stcb); 1334 } else { 1335 SCTP_INP_WLOCK(inp); 1336 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1337 goto null_return; 1338 } 1339 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1340 if (stcb == NULL) { 1341 goto null_return; 1342 } 1343 SCTP_TCB_LOCK(stcb); 1344 1345 if (stcb->rport != rport) { 1346 /* remote port does not match. */ 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1355 SCTP_TCB_UNLOCK(stcb); 1356 goto null_return; 1357 } 1358 /* now look at the list of remote addresses */ 1359 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1360 #ifdef INVARIANTS 1361 if (net == (TAILQ_NEXT(net, sctp_next))) { 1362 panic("Corrupt net list"); 1363 } 1364 #endif 1365 if (net->ro._l_addr.sa.sa_family != 1366 remote->sa_family) { 1367 /* not the same family */ 1368 continue; 1369 } 1370 switch (remote->sa_family) { 1371 #ifdef INET 1372 case AF_INET: 1373 { 1374 struct sockaddr_in *sin, 1375 *rsin; 1376 1377 sin = (struct sockaddr_in *) 1378 &net->ro._l_addr; 1379 rsin = (struct sockaddr_in *)remote; 1380 if (sin->sin_addr.s_addr == 1381 rsin->sin_addr.s_addr) { 1382 /* found it */ 1383 if (netp != NULL) { 1384 *netp = net; 1385 } 1386 if (locked_tcb == NULL) { 1387 SCTP_INP_DECR_REF(inp); 1388 } else if (locked_tcb != stcb) { 1389 SCTP_TCB_LOCK(locked_tcb); 1390 } 1391 if (locked_tcb) { 1392 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1393 } 1394 SCTP_INP_WUNLOCK(inp); 1395 SCTP_INP_INFO_RUNLOCK(); 1396 return (stcb); 1397 } 1398 break; 1399 } 1400 #endif 1401 #ifdef INET6 1402 case AF_INET6: 1403 { 1404 struct sockaddr_in6 *sin6, 1405 *rsin6; 1406 1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1408 rsin6 = (struct sockaddr_in6 *)remote; 1409 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1410 rsin6)) { 1411 /* found it */ 1412 if (netp != NULL) { 1413 *netp = net; 1414 } 1415 if (locked_tcb == NULL) { 1416 SCTP_INP_DECR_REF(inp); 1417 } else if (locked_tcb != stcb) { 1418 SCTP_TCB_LOCK(locked_tcb); 1419 } 1420 if (locked_tcb) { 1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1422 } 1423 SCTP_INP_WUNLOCK(inp); 1424 SCTP_INP_INFO_RUNLOCK(); 1425 return (stcb); 1426 } 1427 break; 1428 } 1429 #endif 1430 default: 1431 /* TSNH */ 1432 break; 1433 } 1434 } 1435 SCTP_TCB_UNLOCK(stcb); 1436 } 1437 } else { 1438 SCTP_INP_WLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 goto null_return; 1441 } 1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1443 inp->sctp_hashmark)]; 1444 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1445 if (stcb->rport != rport) { 1446 /* remote port does not match */ 1447 continue; 1448 } 1449 SCTP_TCB_LOCK(stcb); 1450 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1455 SCTP_TCB_UNLOCK(stcb); 1456 continue; 1457 } 1458 /* now look at the list of remote addresses */ 1459 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1460 #ifdef INVARIANTS 1461 if (net == (TAILQ_NEXT(net, sctp_next))) { 1462 panic("Corrupt net list"); 1463 } 1464 #endif 1465 if (net->ro._l_addr.sa.sa_family != 1466 remote->sa_family) { 1467 /* not the same family */ 1468 continue; 1469 } 1470 switch (remote->sa_family) { 1471 #ifdef INET 1472 case AF_INET: 1473 { 1474 struct sockaddr_in *sin, 1475 *rsin; 1476 1477 sin = (struct sockaddr_in *) 1478 &net->ro._l_addr; 1479 rsin = (struct sockaddr_in *)remote; 1480 if (sin->sin_addr.s_addr == 1481 rsin->sin_addr.s_addr) { 1482 /* found it */ 1483 if (netp != NULL) { 1484 *netp = net; 1485 } 1486 if (locked_tcb == NULL) { 1487 SCTP_INP_DECR_REF(inp); 1488 } else if (locked_tcb != stcb) { 1489 SCTP_TCB_LOCK(locked_tcb); 1490 } 1491 if (locked_tcb) { 1492 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1493 } 1494 SCTP_INP_WUNLOCK(inp); 1495 SCTP_INP_INFO_RUNLOCK(); 1496 return (stcb); 1497 } 1498 break; 1499 } 1500 #endif 1501 #ifdef INET6 1502 case AF_INET6: 1503 { 1504 struct sockaddr_in6 *sin6, 1505 *rsin6; 1506 1507 sin6 = (struct sockaddr_in6 *) 1508 &net->ro._l_addr; 1509 rsin6 = (struct sockaddr_in6 *)remote; 1510 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1511 rsin6)) { 1512 /* found it */ 1513 if (netp != NULL) { 1514 *netp = net; 1515 } 1516 if (locked_tcb == NULL) { 1517 SCTP_INP_DECR_REF(inp); 1518 } else if (locked_tcb != stcb) { 1519 SCTP_TCB_LOCK(locked_tcb); 1520 } 1521 if (locked_tcb) { 1522 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1523 } 1524 SCTP_INP_WUNLOCK(inp); 1525 SCTP_INP_INFO_RUNLOCK(); 1526 return (stcb); 1527 } 1528 break; 1529 } 1530 #endif 1531 default: 1532 /* TSNH */ 1533 break; 1534 } 1535 } 1536 SCTP_TCB_UNLOCK(stcb); 1537 } 1538 } 1539 null_return: 1540 /* clean up for returning null */ 1541 if (locked_tcb) { 1542 SCTP_TCB_LOCK(locked_tcb); 1543 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1544 } 1545 SCTP_INP_WUNLOCK(inp); 1546 SCTP_INP_INFO_RUNLOCK(); 1547 /* not found */ 1548 return (NULL); 1549 } 1550 1551 1552 /* 1553 * Find an association for a specific endpoint using the association id given 1554 * out in the COMM_UP notification 1555 */ 1556 struct sctp_tcb * 1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1558 { 1559 /* 1560 * Use my the assoc_id to find a endpoint 1561 */ 1562 struct sctpasochead *head; 1563 struct sctp_tcb *stcb; 1564 uint32_t id; 1565 1566 if (inp == NULL) { 1567 SCTP_PRINTF("TSNH ep_associd\n"); 1568 return (NULL); 1569 } 1570 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1571 SCTP_PRINTF("TSNH ep_associd0\n"); 1572 return (NULL); 1573 } 1574 id = (uint32_t) asoc_id; 1575 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1576 if (head == NULL) { 1577 /* invalid id TSNH */ 1578 SCTP_PRINTF("TSNH ep_associd1\n"); 1579 return (NULL); 1580 } 1581 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1582 if (stcb->asoc.assoc_id == id) { 1583 if (inp != stcb->sctp_ep) { 1584 /* 1585 * some other guy has the same id active (id 1586 * collision ??). 1587 */ 1588 SCTP_PRINTF("TSNH ep_associd2\n"); 1589 continue; 1590 } 1591 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1592 continue; 1593 } 1594 if (want_lock) { 1595 SCTP_TCB_LOCK(stcb); 1596 } 1597 return (stcb); 1598 } 1599 } 1600 return (NULL); 1601 } 1602 1603 1604 struct sctp_tcb * 1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1606 { 1607 struct sctp_tcb *stcb; 1608 1609 SCTP_INP_RLOCK(inp); 1610 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1611 SCTP_INP_RUNLOCK(inp); 1612 return (stcb); 1613 } 1614 1615 1616 /* 1617 * Endpoint probe expects that the INP_INFO is locked. 1618 */ 1619 static struct sctp_inpcb * 1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1621 uint16_t lport, uint32_t vrf_id) 1622 { 1623 struct sctp_inpcb *inp; 1624 struct sctp_laddr *laddr; 1625 1626 #ifdef INET 1627 struct sockaddr_in *sin; 1628 1629 #endif 1630 #ifdef INET6 1631 struct sockaddr_in6 *sin6; 1632 struct sockaddr_in6 *intf_addr6; 1633 1634 #endif 1635 int fnd; 1636 1637 #ifdef INET 1638 sin = NULL; 1639 #endif 1640 #ifdef INET6 1641 sin6 = NULL; 1642 #endif 1643 switch (nam->sa_family) { 1644 #ifdef INET 1645 case AF_INET: 1646 sin = (struct sockaddr_in *)nam; 1647 break; 1648 #endif 1649 #ifdef INET6 1650 case AF_INET6: 1651 sin6 = (struct sockaddr_in6 *)nam; 1652 break; 1653 #endif 1654 default: 1655 /* unsupported family */ 1656 return (NULL); 1657 } 1658 1659 if (head == NULL) 1660 return (NULL); 1661 1662 LIST_FOREACH(inp, head, sctp_hash) { 1663 SCTP_INP_RLOCK(inp); 1664 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1665 SCTP_INP_RUNLOCK(inp); 1666 continue; 1667 } 1668 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1669 (inp->sctp_lport == lport)) { 1670 /* got it */ 1671 switch (nam->sa_family) { 1672 #ifdef INET 1673 case AF_INET: 1674 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1675 SCTP_IPV6_V6ONLY(inp)) { 1676 /* 1677 * IPv4 on a IPv6 socket with ONLY 1678 * IPv6 set 1679 */ 1680 SCTP_INP_RUNLOCK(inp); 1681 continue; 1682 } 1683 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1684 &sin->sin_addr) != 0) { 1685 SCTP_INP_RUNLOCK(inp); 1686 continue; 1687 } 1688 break; 1689 #endif 1690 #ifdef INET6 1691 case AF_INET6: 1692 /* 1693 * A V6 address and the endpoint is NOT 1694 * bound V6 1695 */ 1696 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1697 SCTP_INP_RUNLOCK(inp); 1698 continue; 1699 } 1700 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1701 &sin6->sin6_addr) != 0) { 1702 SCTP_INP_RUNLOCK(inp); 1703 continue; 1704 } 1705 break; 1706 #endif 1707 default: 1708 break; 1709 } 1710 /* does a VRF id match? */ 1711 fnd = 0; 1712 if (inp->def_vrf_id == vrf_id) 1713 fnd = 1; 1714 1715 SCTP_INP_RUNLOCK(inp); 1716 if (!fnd) 1717 continue; 1718 return (inp); 1719 } 1720 SCTP_INP_RUNLOCK(inp); 1721 } 1722 switch (nam->sa_family) { 1723 #ifdef INET 1724 case AF_INET: 1725 if (sin->sin_addr.s_addr == INADDR_ANY) { 1726 /* Can't hunt for one that has no address specified */ 1727 return (NULL); 1728 } 1729 break; 1730 #endif 1731 #ifdef INET6 1732 case AF_INET6: 1733 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1734 /* Can't hunt for one that has no address specified */ 1735 return (NULL); 1736 } 1737 break; 1738 #endif 1739 default: 1740 break; 1741 } 1742 /* 1743 * ok, not bound to all so see if we can find a EP bound to this 1744 * address. 1745 */ 1746 LIST_FOREACH(inp, head, sctp_hash) { 1747 SCTP_INP_RLOCK(inp); 1748 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1749 SCTP_INP_RUNLOCK(inp); 1750 continue; 1751 } 1752 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1753 SCTP_INP_RUNLOCK(inp); 1754 continue; 1755 } 1756 /* 1757 * Ok this could be a likely candidate, look at all of its 1758 * addresses 1759 */ 1760 if (inp->sctp_lport != lport) { 1761 SCTP_INP_RUNLOCK(inp); 1762 continue; 1763 } 1764 /* does a VRF id match? */ 1765 fnd = 0; 1766 if (inp->def_vrf_id == vrf_id) 1767 fnd = 1; 1768 1769 if (!fnd) { 1770 SCTP_INP_RUNLOCK(inp); 1771 continue; 1772 } 1773 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1774 if (laddr->ifa == NULL) { 1775 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1776 __func__); 1777 continue; 1778 } 1779 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1780 (void *)laddr->ifa); 1781 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1783 continue; 1784 } 1785 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1786 /* possible, see if it matches */ 1787 switch (nam->sa_family) { 1788 #ifdef INET 1789 case AF_INET: 1790 if (sin->sin_addr.s_addr == 1791 laddr->ifa->address.sin.sin_addr.s_addr) { 1792 SCTP_INP_RUNLOCK(inp); 1793 return (inp); 1794 } 1795 break; 1796 #endif 1797 #ifdef INET6 1798 case AF_INET6: 1799 intf_addr6 = &laddr->ifa->address.sin6; 1800 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1801 intf_addr6)) { 1802 SCTP_INP_RUNLOCK(inp); 1803 return (inp); 1804 } 1805 break; 1806 #endif 1807 } 1808 } 1809 } 1810 SCTP_INP_RUNLOCK(inp); 1811 } 1812 return (NULL); 1813 } 1814 1815 1816 static struct sctp_inpcb * 1817 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1818 { 1819 struct sctppcbhead *head; 1820 struct sctp_inpcb *t_inp; 1821 int fnd; 1822 1823 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1824 SCTP_BASE_INFO(hashmark))]; 1825 LIST_FOREACH(t_inp, head, sctp_hash) { 1826 if (t_inp->sctp_lport != lport) { 1827 continue; 1828 } 1829 /* is it in the VRF in question */ 1830 fnd = 0; 1831 if (t_inp->def_vrf_id == vrf_id) 1832 fnd = 1; 1833 if (!fnd) 1834 continue; 1835 1836 /* This one is in use. */ 1837 /* check the v6/v4 binding issue */ 1838 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1839 SCTP_IPV6_V6ONLY(t_inp)) { 1840 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1841 /* collision in V6 space */ 1842 return (t_inp); 1843 } else { 1844 /* inp is BOUND_V4 no conflict */ 1845 continue; 1846 } 1847 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1848 /* t_inp is bound v4 and v6, conflict always */ 1849 return (t_inp); 1850 } else { 1851 /* t_inp is bound only V4 */ 1852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1853 SCTP_IPV6_V6ONLY(inp)) { 1854 /* no conflict */ 1855 continue; 1856 } 1857 /* else fall through to conflict */ 1858 } 1859 return (t_inp); 1860 } 1861 return (NULL); 1862 } 1863 1864 1865 int 1866 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1867 { 1868 /* For 1-2-1 with port reuse */ 1869 struct sctppcbhead *head; 1870 struct sctp_inpcb *tinp, *ninp; 1871 1872 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1873 /* only works with port reuse on */ 1874 return (-1); 1875 } 1876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1877 return (0); 1878 } 1879 SCTP_INP_RUNLOCK(inp); 1880 SCTP_INP_INFO_WLOCK(); 1881 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1882 SCTP_BASE_INFO(hashmark))]; 1883 /* Kick out all non-listeners to the TCP hash */ 1884 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1885 if (tinp->sctp_lport != inp->sctp_lport) { 1886 continue; 1887 } 1888 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1889 continue; 1890 } 1891 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1892 continue; 1893 } 1894 if (tinp->sctp_socket->so_qlimit) { 1895 continue; 1896 } 1897 SCTP_INP_WLOCK(tinp); 1898 LIST_REMOVE(tinp, sctp_hash); 1899 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1900 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1901 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1902 SCTP_INP_WUNLOCK(tinp); 1903 } 1904 SCTP_INP_WLOCK(inp); 1905 /* Pull from where he was */ 1906 LIST_REMOVE(inp, sctp_hash); 1907 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1908 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1909 LIST_INSERT_HEAD(head, inp, sctp_hash); 1910 SCTP_INP_WUNLOCK(inp); 1911 SCTP_INP_RLOCK(inp); 1912 SCTP_INP_INFO_WUNLOCK(); 1913 return (0); 1914 } 1915 1916 1917 struct sctp_inpcb * 1918 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1919 uint32_t vrf_id) 1920 { 1921 /* 1922 * First we check the hash table to see if someone has this port 1923 * bound with just the port. 1924 */ 1925 struct sctp_inpcb *inp; 1926 struct sctppcbhead *head; 1927 int lport; 1928 unsigned int i; 1929 1930 #ifdef INET 1931 struct sockaddr_in *sin; 1932 1933 #endif 1934 #ifdef INET6 1935 struct sockaddr_in6 *sin6; 1936 1937 #endif 1938 1939 switch (nam->sa_family) { 1940 #ifdef INET 1941 case AF_INET: 1942 sin = (struct sockaddr_in *)nam; 1943 lport = sin->sin_port; 1944 break; 1945 #endif 1946 #ifdef INET6 1947 case AF_INET6: 1948 sin6 = (struct sockaddr_in6 *)nam; 1949 lport = sin6->sin6_port; 1950 break; 1951 #endif 1952 default: 1953 return (NULL); 1954 } 1955 /* 1956 * I could cheat here and just cast to one of the types but we will 1957 * do it right. It also provides the check against an Unsupported 1958 * type too. 1959 */ 1960 /* Find the head of the ALLADDR chain */ 1961 if (have_lock == 0) { 1962 SCTP_INP_INFO_RLOCK(); 1963 } 1964 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1965 SCTP_BASE_INFO(hashmark))]; 1966 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1967 1968 /* 1969 * If the TCP model exists it could be that the main listening 1970 * endpoint is gone but there still exists a connected socket for 1971 * this guy. If so we can return the first one that we find. This 1972 * may NOT be the correct one so the caller should be wary on the 1973 * returned INP. Currently the only caller that sets find_tcp_pool 1974 * is in bindx where we are verifying that a user CAN bind the 1975 * address. He either has bound it already, or someone else has, or 1976 * its open to bind, so this is good enough. 1977 */ 1978 if (inp == NULL && find_tcp_pool) { 1979 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1980 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1981 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1982 if (inp) { 1983 break; 1984 } 1985 } 1986 } 1987 if (inp) { 1988 SCTP_INP_INCR_REF(inp); 1989 } 1990 if (have_lock == 0) { 1991 SCTP_INP_INFO_RUNLOCK(); 1992 } 1993 return (inp); 1994 } 1995 1996 1997 /* 1998 * Find an association for an endpoint with the pointer to whom you want to 1999 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2000 * need to change the *to to some other struct like a mbuf... 2001 */ 2002 struct sctp_tcb * 2003 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2004 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2005 uint32_t vrf_id) 2006 { 2007 struct sctp_inpcb *inp = NULL; 2008 struct sctp_tcb *stcb; 2009 2010 SCTP_INP_INFO_RLOCK(); 2011 if (find_tcp_pool) { 2012 if (inp_p != NULL) { 2013 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2014 vrf_id); 2015 } else { 2016 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2017 vrf_id); 2018 } 2019 if (stcb != NULL) { 2020 SCTP_INP_INFO_RUNLOCK(); 2021 return (stcb); 2022 } 2023 } 2024 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2025 if (inp_p != NULL) { 2026 *inp_p = inp; 2027 } 2028 SCTP_INP_INFO_RUNLOCK(); 2029 if (inp == NULL) { 2030 return (NULL); 2031 } 2032 /* 2033 * ok, we have an endpoint, now lets find the assoc for it (if any) 2034 * we now place the source address or from in the to of the find 2035 * endpoint call. Since in reality this chain is used from the 2036 * inbound packet side. 2037 */ 2038 if (inp_p != NULL) { 2039 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2040 NULL); 2041 } else { 2042 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2043 NULL); 2044 } 2045 return (stcb); 2046 } 2047 2048 2049 /* 2050 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2051 * find all addresses that the sender has specified in any address list. Each 2052 * address will be used to lookup the TCB and see if one exits. 2053 */ 2054 static struct sctp_tcb * 2055 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2056 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2057 struct sockaddr *dst) 2058 { 2059 struct sctp_paramhdr *phdr, parm_buf; 2060 2061 #if defined(INET) || defined(INET6) 2062 struct sctp_tcb *stcb; 2063 uint16_t ptype; 2064 2065 #endif 2066 uint16_t plen; 2067 2068 #ifdef INET 2069 struct sockaddr_in sin4; 2070 2071 #endif 2072 #ifdef INET6 2073 struct sockaddr_in6 sin6; 2074 2075 #endif 2076 2077 #ifdef INET 2078 memset(&sin4, 0, sizeof(sin4)); 2079 sin4.sin_len = sizeof(sin4); 2080 sin4.sin_family = AF_INET; 2081 sin4.sin_port = sh->src_port; 2082 #endif 2083 #ifdef INET6 2084 memset(&sin6, 0, sizeof(sin6)); 2085 sin6.sin6_len = sizeof(sin6); 2086 sin6.sin6_family = AF_INET6; 2087 sin6.sin6_port = sh->src_port; 2088 #endif 2089 2090 offset += sizeof(struct sctp_init_chunk); 2091 2092 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2093 while (phdr != NULL) { 2094 /* now we must see if we want the parameter */ 2095 #if defined(INET) || defined(INET6) 2096 ptype = ntohs(phdr->param_type); 2097 #endif 2098 plen = ntohs(phdr->param_length); 2099 if (plen == 0) { 2100 break; 2101 } 2102 #ifdef INET 2103 if (ptype == SCTP_IPV4_ADDRESS && 2104 plen == sizeof(struct sctp_ipv4addr_param)) { 2105 /* Get the rest of the address */ 2106 struct sctp_ipv4addr_param ip4_parm, *p4; 2107 2108 phdr = sctp_get_next_param(m, offset, 2109 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2110 if (phdr == NULL) { 2111 return (NULL); 2112 } 2113 p4 = (struct sctp_ipv4addr_param *)phdr; 2114 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2115 /* look it up */ 2116 stcb = sctp_findassociation_ep_addr(inp_p, 2117 (struct sockaddr *)&sin4, netp, dst, NULL); 2118 if (stcb != NULL) { 2119 return (stcb); 2120 } 2121 } 2122 #endif 2123 #ifdef INET6 2124 if (ptype == SCTP_IPV6_ADDRESS && 2125 plen == sizeof(struct sctp_ipv6addr_param)) { 2126 /* Get the rest of the address */ 2127 struct sctp_ipv6addr_param ip6_parm, *p6; 2128 2129 phdr = sctp_get_next_param(m, offset, 2130 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2131 if (phdr == NULL) { 2132 return (NULL); 2133 } 2134 p6 = (struct sctp_ipv6addr_param *)phdr; 2135 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2136 /* look it up */ 2137 stcb = sctp_findassociation_ep_addr(inp_p, 2138 (struct sockaddr *)&sin6, netp, dst, NULL); 2139 if (stcb != NULL) { 2140 return (stcb); 2141 } 2142 } 2143 #endif 2144 offset += SCTP_SIZE32(plen); 2145 phdr = sctp_get_next_param(m, offset, &parm_buf, 2146 sizeof(parm_buf)); 2147 } 2148 return (NULL); 2149 } 2150 2151 static struct sctp_tcb * 2152 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2153 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2154 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2155 { 2156 /* 2157 * Use my vtag to hash. If we find it we then verify the source addr 2158 * is in the assoc. If all goes well we save a bit on rec of a 2159 * packet. 2160 */ 2161 struct sctpasochead *head; 2162 struct sctp_nets *net; 2163 struct sctp_tcb *stcb; 2164 2165 SCTP_INP_INFO_RLOCK(); 2166 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2167 SCTP_BASE_INFO(hashasocmark))]; 2168 LIST_FOREACH(stcb, head, sctp_asocs) { 2169 SCTP_INP_RLOCK(stcb->sctp_ep); 2170 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2171 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2172 continue; 2173 } 2174 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2175 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2176 continue; 2177 } 2178 SCTP_TCB_LOCK(stcb); 2179 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2180 if (stcb->asoc.my_vtag == vtag) { 2181 /* candidate */ 2182 if (stcb->rport != rport) { 2183 SCTP_TCB_UNLOCK(stcb); 2184 continue; 2185 } 2186 if (stcb->sctp_ep->sctp_lport != lport) { 2187 SCTP_TCB_UNLOCK(stcb); 2188 continue; 2189 } 2190 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2191 SCTP_TCB_UNLOCK(stcb); 2192 continue; 2193 } 2194 /* RRS:Need toaddr check here */ 2195 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2196 /* Endpoint does not own this address */ 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 if (remote_tag) { 2201 /* 2202 * If we have both vtags that's all we match 2203 * on 2204 */ 2205 if (stcb->asoc.peer_vtag == remote_tag) { 2206 /* 2207 * If both tags match we consider it 2208 * conclusive and check NO 2209 * source/destination addresses 2210 */ 2211 goto conclusive; 2212 } 2213 } 2214 if (skip_src_check) { 2215 conclusive: 2216 if (from) { 2217 *netp = sctp_findnet(stcb, from); 2218 } else { 2219 *netp = NULL; /* unknown */ 2220 } 2221 if (inp_p) 2222 *inp_p = stcb->sctp_ep; 2223 SCTP_INP_INFO_RUNLOCK(); 2224 return (stcb); 2225 } 2226 net = sctp_findnet(stcb, from); 2227 if (net) { 2228 /* yep its him. */ 2229 *netp = net; 2230 SCTP_STAT_INCR(sctps_vtagexpress); 2231 *inp_p = stcb->sctp_ep; 2232 SCTP_INP_INFO_RUNLOCK(); 2233 return (stcb); 2234 } else { 2235 /* 2236 * not him, this should only happen in rare 2237 * cases so I peg it. 2238 */ 2239 SCTP_STAT_INCR(sctps_vtagbogus); 2240 } 2241 } 2242 SCTP_TCB_UNLOCK(stcb); 2243 } 2244 SCTP_INP_INFO_RUNLOCK(); 2245 return (NULL); 2246 } 2247 2248 2249 /* 2250 * Find an association with the pointer to the inbound IP packet. This can be 2251 * a IPv4 or IPv6 packet. 2252 */ 2253 struct sctp_tcb * 2254 sctp_findassociation_addr(struct mbuf *m, int offset, 2255 struct sockaddr *src, struct sockaddr *dst, 2256 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2257 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2258 { 2259 struct sctp_tcb *stcb; 2260 struct sctp_inpcb *inp; 2261 2262 if (sh->v_tag) { 2263 /* we only go down this path if vtag is non-zero */ 2264 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2265 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2266 if (stcb) { 2267 return (stcb); 2268 } 2269 } 2270 if (inp_p) { 2271 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2272 1, vrf_id); 2273 inp = *inp_p; 2274 } else { 2275 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2276 1, vrf_id); 2277 } 2278 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2279 if (stcb == NULL && inp) { 2280 /* Found a EP but not this address */ 2281 if ((ch->chunk_type == SCTP_INITIATION) || 2282 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2283 /*- 2284 * special hook, we do NOT return linp or an 2285 * association that is linked to an existing 2286 * association that is under the TCP pool (i.e. no 2287 * listener exists). The endpoint finding routine 2288 * will always find a listener before examining the 2289 * TCP pool. 2290 */ 2291 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2292 if (inp_p) { 2293 *inp_p = NULL; 2294 } 2295 return (NULL); 2296 } 2297 stcb = sctp_findassociation_special_addr(m, 2298 offset, sh, &inp, netp, dst); 2299 if (inp_p != NULL) { 2300 *inp_p = inp; 2301 } 2302 } 2303 } 2304 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2305 return (stcb); 2306 } 2307 2308 /* 2309 * lookup an association by an ASCONF lookup address. 2310 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2311 */ 2312 struct sctp_tcb * 2313 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2314 struct sockaddr *dst, struct sctphdr *sh, 2315 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2316 { 2317 struct sctp_tcb *stcb; 2318 union sctp_sockstore remote_store; 2319 struct sctp_paramhdr parm_buf, *phdr; 2320 int ptype; 2321 int zero_address = 0; 2322 2323 #ifdef INET 2324 struct sockaddr_in *sin; 2325 2326 #endif 2327 #ifdef INET6 2328 struct sockaddr_in6 *sin6; 2329 2330 #endif 2331 2332 memset(&remote_store, 0, sizeof(remote_store)); 2333 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2334 &parm_buf, sizeof(struct sctp_paramhdr)); 2335 if (phdr == NULL) { 2336 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2337 __func__); 2338 return NULL; 2339 } 2340 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2341 /* get the correlation address */ 2342 switch (ptype) { 2343 #ifdef INET6 2344 case SCTP_IPV6_ADDRESS: 2345 { 2346 /* ipv6 address param */ 2347 struct sctp_ipv6addr_param *p6, p6_buf; 2348 2349 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2350 return NULL; 2351 } 2352 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2353 offset + sizeof(struct sctp_asconf_chunk), 2354 &p6_buf.ph, sizeof(*p6)); 2355 if (p6 == NULL) { 2356 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2357 __func__); 2358 return (NULL); 2359 } 2360 sin6 = &remote_store.sin6; 2361 sin6->sin6_family = AF_INET6; 2362 sin6->sin6_len = sizeof(*sin6); 2363 sin6->sin6_port = sh->src_port; 2364 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2365 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2366 zero_address = 1; 2367 break; 2368 } 2369 #endif 2370 #ifdef INET 2371 case SCTP_IPV4_ADDRESS: 2372 { 2373 /* ipv4 address param */ 2374 struct sctp_ipv4addr_param *p4, p4_buf; 2375 2376 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2377 return NULL; 2378 } 2379 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2380 offset + sizeof(struct sctp_asconf_chunk), 2381 &p4_buf.ph, sizeof(*p4)); 2382 if (p4 == NULL) { 2383 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2384 __func__); 2385 return (NULL); 2386 } 2387 sin = &remote_store.sin; 2388 sin->sin_family = AF_INET; 2389 sin->sin_len = sizeof(*sin); 2390 sin->sin_port = sh->src_port; 2391 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2392 if (sin->sin_addr.s_addr == INADDR_ANY) 2393 zero_address = 1; 2394 break; 2395 } 2396 #endif 2397 default: 2398 /* invalid address param type */ 2399 return NULL; 2400 } 2401 2402 if (zero_address) { 2403 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2404 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2405 if (stcb != NULL) { 2406 SCTP_INP_DECR_REF(*inp_p); 2407 } 2408 } else { 2409 stcb = sctp_findassociation_ep_addr(inp_p, 2410 &remote_store.sa, netp, 2411 dst, NULL); 2412 } 2413 return (stcb); 2414 } 2415 2416 2417 /* 2418 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2419 * addresses. This way if we don't get a bind we by default pick a ephemeral 2420 * port with all addresses bound. 2421 */ 2422 int 2423 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2424 { 2425 /* 2426 * we get called when a new endpoint starts up. We need to allocate 2427 * the sctp_inpcb structure from the zone and init it. Mark it as 2428 * unbound and find a port that we can use as an ephemeral with 2429 * INADDR_ANY. If the user binds later no problem we can then add in 2430 * the specific addresses. And setup the default parameters for the 2431 * EP. 2432 */ 2433 int i, error; 2434 struct sctp_inpcb *inp; 2435 struct sctp_pcb *m; 2436 struct timeval time; 2437 sctp_sharedkey_t *null_key; 2438 2439 error = 0; 2440 2441 SCTP_INP_INFO_WLOCK(); 2442 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2443 if (inp == NULL) { 2444 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2445 SCTP_INP_INFO_WUNLOCK(); 2446 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2447 return (ENOBUFS); 2448 } 2449 /* zap it */ 2450 bzero(inp, sizeof(*inp)); 2451 2452 /* bump generations */ 2453 /* setup socket pointers */ 2454 inp->sctp_socket = so; 2455 inp->ip_inp.inp.inp_socket = so; 2456 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2457 #ifdef INET6 2458 if (INP_SOCKAF(so) == AF_INET6) { 2459 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2460 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2461 } 2462 if (MODULE_GLOBAL(ip6_v6only)) { 2463 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2464 } 2465 } 2466 #endif 2467 inp->sctp_associd_counter = 1; 2468 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2469 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2470 inp->max_cwnd = 0; 2471 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2472 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2473 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2474 inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable); 2475 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2476 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2477 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2478 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2479 inp->fibnum = so->so_fibnum; 2480 /* init the small hash table we use to track asocid <-> tcb */ 2481 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2482 if (inp->sctp_asocidhash == NULL) { 2483 crfree(inp->ip_inp.inp.inp_cred); 2484 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2485 SCTP_INP_INFO_WUNLOCK(); 2486 return (ENOBUFS); 2487 } 2488 #ifdef IPSEC 2489 error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp); 2490 if (error != 0) { 2491 crfree(inp->ip_inp.inp.inp_cred); 2492 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2493 SCTP_INP_INFO_WUNLOCK(); 2494 return error; 2495 } 2496 #endif /* IPSEC */ 2497 SCTP_INCR_EP_COUNT(); 2498 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2499 SCTP_INP_INFO_WUNLOCK(); 2500 2501 so->so_pcb = (caddr_t)inp; 2502 2503 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2504 /* UDP style socket */ 2505 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2506 SCTP_PCB_FLAGS_UNBOUND); 2507 /* Be sure it is NON-BLOCKING IO for UDP */ 2508 /* SCTP_SET_SO_NBIO(so); */ 2509 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2510 /* TCP style socket */ 2511 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2512 SCTP_PCB_FLAGS_UNBOUND); 2513 /* Be sure we have blocking IO by default */ 2514 SCTP_CLEAR_SO_NBIO(so); 2515 } else { 2516 /* 2517 * unsupported socket type (RAW, etc)- in case we missed it 2518 * in protosw 2519 */ 2520 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2521 so->so_pcb = NULL; 2522 crfree(inp->ip_inp.inp.inp_cred); 2523 #ifdef IPSEC 2524 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2525 #endif 2526 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2527 return (EOPNOTSUPP); 2528 } 2529 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2530 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2531 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2532 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2533 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2534 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2535 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2536 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2537 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2538 } 2539 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2540 &inp->sctp_hashmark); 2541 if (inp->sctp_tcbhash == NULL) { 2542 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2543 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2544 so->so_pcb = NULL; 2545 crfree(inp->ip_inp.inp.inp_cred); 2546 #ifdef IPSEC 2547 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2548 #endif 2549 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2550 return (ENOBUFS); 2551 } 2552 inp->def_vrf_id = vrf_id; 2553 2554 SCTP_INP_INFO_WLOCK(); 2555 SCTP_INP_LOCK_INIT(inp); 2556 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2557 SCTP_INP_READ_INIT(inp); 2558 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2559 /* lock the new ep */ 2560 SCTP_INP_WLOCK(inp); 2561 2562 /* add it to the info area */ 2563 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2564 SCTP_INP_INFO_WUNLOCK(); 2565 2566 TAILQ_INIT(&inp->read_queue); 2567 LIST_INIT(&inp->sctp_addr_list); 2568 2569 LIST_INIT(&inp->sctp_asoc_list); 2570 2571 #ifdef SCTP_TRACK_FREED_ASOCS 2572 /* TEMP CODE */ 2573 LIST_INIT(&inp->sctp_asoc_free_list); 2574 #endif 2575 /* Init the timer structure for signature change */ 2576 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2577 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2578 2579 /* now init the actual endpoint default data */ 2580 m = &inp->sctp_ep; 2581 2582 /* setup the base timeout information */ 2583 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2584 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2585 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2586 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2587 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2588 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2589 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2590 /* all max/min max are in ms */ 2591 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2592 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2593 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2594 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2595 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2596 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2597 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2598 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2599 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2600 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2601 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2602 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2603 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2604 2605 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2606 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2607 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2608 /* number of streams to pre-open on a association */ 2609 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2610 2611 /* Add adaptation cookie */ 2612 m->adaptation_layer_indicator = 0; 2613 m->adaptation_layer_indicator_provided = 0; 2614 2615 /* seed random number generator */ 2616 m->random_counter = 1; 2617 m->store_at = SCTP_SIGNATURE_SIZE; 2618 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2619 sctp_fill_random_store(m); 2620 2621 /* Minimum cookie size */ 2622 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2623 sizeof(struct sctp_state_cookie); 2624 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2625 2626 /* Setup the initial secret */ 2627 (void)SCTP_GETTIME_TIMEVAL(&time); 2628 m->time_of_secret_change = time.tv_sec; 2629 2630 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2631 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2632 } 2633 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2634 2635 /* How long is a cookie good for ? */ 2636 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2637 /* 2638 * Initialize authentication parameters 2639 */ 2640 m->local_hmacs = sctp_default_supported_hmaclist(); 2641 m->local_auth_chunks = sctp_alloc_chunklist(); 2642 if (inp->asconf_supported) { 2643 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2644 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2645 } 2646 m->default_dscp = 0; 2647 #ifdef INET6 2648 m->default_flowlabel = 0; 2649 #endif 2650 m->port = 0; /* encapsulation disabled by default */ 2651 LIST_INIT(&m->shared_keys); 2652 /* add default NULL key as key id 0 */ 2653 null_key = sctp_alloc_sharedkey(); 2654 sctp_insert_sharedkey(&m->shared_keys, null_key); 2655 SCTP_INP_WUNLOCK(inp); 2656 #ifdef SCTP_LOG_CLOSING 2657 sctp_log_closing(inp, NULL, 12); 2658 #endif 2659 return (error); 2660 } 2661 2662 2663 void 2664 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2665 struct sctp_tcb *stcb) 2666 { 2667 struct sctp_nets *net; 2668 uint16_t lport, rport; 2669 struct sctppcbhead *head; 2670 struct sctp_laddr *laddr, *oladdr; 2671 2672 atomic_add_int(&stcb->asoc.refcnt, 1); 2673 SCTP_TCB_UNLOCK(stcb); 2674 SCTP_INP_INFO_WLOCK(); 2675 SCTP_INP_WLOCK(old_inp); 2676 SCTP_INP_WLOCK(new_inp); 2677 SCTP_TCB_LOCK(stcb); 2678 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2679 2680 new_inp->sctp_ep.time_of_secret_change = 2681 old_inp->sctp_ep.time_of_secret_change; 2682 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2683 sizeof(old_inp->sctp_ep.secret_key)); 2684 new_inp->sctp_ep.current_secret_number = 2685 old_inp->sctp_ep.current_secret_number; 2686 new_inp->sctp_ep.last_secret_number = 2687 old_inp->sctp_ep.last_secret_number; 2688 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2689 2690 /* make it so new data pours into the new socket */ 2691 stcb->sctp_socket = new_inp->sctp_socket; 2692 stcb->sctp_ep = new_inp; 2693 2694 /* Copy the port across */ 2695 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2696 rport = stcb->rport; 2697 /* Pull the tcb from the old association */ 2698 LIST_REMOVE(stcb, sctp_tcbhash); 2699 LIST_REMOVE(stcb, sctp_tcblist); 2700 if (stcb->asoc.in_asocid_hash) { 2701 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2702 } 2703 /* Now insert the new_inp into the TCP connected hash */ 2704 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2705 2706 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2707 /* Its safe to access */ 2708 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2709 2710 /* Now move the tcb into the endpoint list */ 2711 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2712 /* 2713 * Question, do we even need to worry about the ep-hash since we 2714 * only have one connection? Probably not :> so lets get rid of it 2715 * and not suck up any kernel memory in that. 2716 */ 2717 if (stcb->asoc.in_asocid_hash) { 2718 struct sctpasochead *lhd; 2719 2720 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2721 new_inp->hashasocidmark)]; 2722 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2723 } 2724 /* Ok. Let's restart timer. */ 2725 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2726 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2727 stcb, net); 2728 } 2729 2730 SCTP_INP_INFO_WUNLOCK(); 2731 if (new_inp->sctp_tcbhash != NULL) { 2732 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2733 new_inp->sctp_tcbhash = NULL; 2734 } 2735 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2736 /* Subset bound, so copy in the laddr list from the old_inp */ 2737 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2738 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2739 if (laddr == NULL) { 2740 /* 2741 * Gak, what can we do? This assoc is really 2742 * HOSED. We probably should send an abort 2743 * here. 2744 */ 2745 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2746 continue; 2747 } 2748 SCTP_INCR_LADDR_COUNT(); 2749 bzero(laddr, sizeof(*laddr)); 2750 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2751 laddr->ifa = oladdr->ifa; 2752 atomic_add_int(&laddr->ifa->refcount, 1); 2753 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2754 sctp_nxt_addr); 2755 new_inp->laddr_count++; 2756 if (oladdr == stcb->asoc.last_used_address) { 2757 stcb->asoc.last_used_address = laddr; 2758 } 2759 } 2760 } 2761 /* 2762 * Now any running timers need to be adjusted since we really don't 2763 * care if they are running or not just blast in the new_inp into 2764 * all of them. 2765 */ 2766 2767 stcb->asoc.dack_timer.ep = (void *)new_inp; 2768 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2769 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2770 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2771 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2772 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2773 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2774 /* now what about the nets? */ 2775 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2776 net->pmtu_timer.ep = (void *)new_inp; 2777 net->hb_timer.ep = (void *)new_inp; 2778 net->rxt_timer.ep = (void *)new_inp; 2779 } 2780 SCTP_INP_WUNLOCK(new_inp); 2781 SCTP_INP_WUNLOCK(old_inp); 2782 } 2783 2784 2785 2786 2787 /* sctp_ifap is used to bypass normal local address validation checks */ 2788 int 2789 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2790 struct sctp_ifa *sctp_ifap, struct thread *p) 2791 { 2792 /* bind a ep to a socket address */ 2793 struct sctppcbhead *head; 2794 struct sctp_inpcb *inp, *inp_tmp; 2795 struct inpcb *ip_inp; 2796 int port_reuse_active = 0; 2797 int bindall; 2798 uint16_t lport; 2799 int error; 2800 uint32_t vrf_id; 2801 2802 lport = 0; 2803 bindall = 1; 2804 inp = (struct sctp_inpcb *)so->so_pcb; 2805 ip_inp = (struct inpcb *)so->so_pcb; 2806 #ifdef SCTP_DEBUG 2807 if (addr) { 2808 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2809 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2810 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2811 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2812 } 2813 #endif 2814 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2815 /* already did a bind, subsequent binds NOT allowed ! */ 2816 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2817 return (EINVAL); 2818 } 2819 #ifdef INVARIANTS 2820 if (p == NULL) 2821 panic("null proc/thread"); 2822 #endif 2823 if (addr != NULL) { 2824 switch (addr->sa_family) { 2825 #ifdef INET 2826 case AF_INET: 2827 { 2828 struct sockaddr_in *sin; 2829 2830 /* IPV6_V6ONLY socket? */ 2831 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2832 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2833 return (EINVAL); 2834 } 2835 if (addr->sa_len != sizeof(*sin)) { 2836 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2837 return (EINVAL); 2838 } 2839 sin = (struct sockaddr_in *)addr; 2840 lport = sin->sin_port; 2841 /* 2842 * For LOOPBACK the prison_local_ip4() call 2843 * will transmute the ip address to the 2844 * proper value. 2845 */ 2846 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2847 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2848 return (error); 2849 } 2850 if (sin->sin_addr.s_addr != INADDR_ANY) { 2851 bindall = 0; 2852 } 2853 break; 2854 } 2855 #endif 2856 #ifdef INET6 2857 case AF_INET6: 2858 { 2859 /* 2860 * Only for pure IPv6 Address. (No IPv4 2861 * Mapped!) 2862 */ 2863 struct sockaddr_in6 *sin6; 2864 2865 sin6 = (struct sockaddr_in6 *)addr; 2866 2867 if (addr->sa_len != sizeof(*sin6)) { 2868 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2869 return (EINVAL); 2870 } 2871 lport = sin6->sin6_port; 2872 /* 2873 * For LOOPBACK the prison_local_ip6() call 2874 * will transmute the ipv6 address to the 2875 * proper value. 2876 */ 2877 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2878 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2879 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2880 return (error); 2881 } 2882 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2883 bindall = 0; 2884 /* KAME hack: embed scopeid */ 2885 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2887 return (EINVAL); 2888 } 2889 } 2890 /* this must be cleared for ifa_ifwithaddr() */ 2891 sin6->sin6_scope_id = 0; 2892 break; 2893 } 2894 #endif 2895 default: 2896 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2897 return (EAFNOSUPPORT); 2898 } 2899 } 2900 SCTP_INP_INFO_WLOCK(); 2901 SCTP_INP_WLOCK(inp); 2902 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2903 vrf_id = inp->def_vrf_id; 2904 2905 /* increase our count due to the unlock we do */ 2906 SCTP_INP_INCR_REF(inp); 2907 if (lport) { 2908 /* 2909 * Did the caller specify a port? if so we must see if an ep 2910 * already has this one bound. 2911 */ 2912 /* got to be root to get at low ports */ 2913 if (ntohs(lport) < IPPORT_RESERVED) { 2914 if (p && (error = 2915 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2916 )) { 2917 SCTP_INP_DECR_REF(inp); 2918 SCTP_INP_WUNLOCK(inp); 2919 SCTP_INP_INFO_WUNLOCK(); 2920 return (error); 2921 } 2922 } 2923 SCTP_INP_WUNLOCK(inp); 2924 if (bindall) { 2925 vrf_id = inp->def_vrf_id; 2926 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2927 if (inp_tmp != NULL) { 2928 /* 2929 * lock guy returned and lower count note 2930 * that we are not bound so inp_tmp should 2931 * NEVER be inp. And it is this inp 2932 * (inp_tmp) that gets the reference bump, 2933 * so we must lower it. 2934 */ 2935 SCTP_INP_DECR_REF(inp_tmp); 2936 /* unlock info */ 2937 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2938 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2939 /* 2940 * Ok, must be one-2-one and 2941 * allowing port re-use 2942 */ 2943 port_reuse_active = 1; 2944 goto continue_anyway; 2945 } 2946 SCTP_INP_DECR_REF(inp); 2947 SCTP_INP_INFO_WUNLOCK(); 2948 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2949 return (EADDRINUSE); 2950 } 2951 } else { 2952 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2953 if (inp_tmp != NULL) { 2954 /* 2955 * lock guy returned and lower count note 2956 * that we are not bound so inp_tmp should 2957 * NEVER be inp. And it is this inp 2958 * (inp_tmp) that gets the reference bump, 2959 * so we must lower it. 2960 */ 2961 SCTP_INP_DECR_REF(inp_tmp); 2962 /* unlock info */ 2963 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2964 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2965 /* 2966 * Ok, must be one-2-one and 2967 * allowing port re-use 2968 */ 2969 port_reuse_active = 1; 2970 goto continue_anyway; 2971 } 2972 SCTP_INP_DECR_REF(inp); 2973 SCTP_INP_INFO_WUNLOCK(); 2974 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2975 return (EADDRINUSE); 2976 } 2977 } 2978 continue_anyway: 2979 SCTP_INP_WLOCK(inp); 2980 if (bindall) { 2981 /* verify that no lport is not used by a singleton */ 2982 if ((port_reuse_active == 0) && 2983 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2984 /* Sorry someone already has this one bound */ 2985 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2986 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2987 port_reuse_active = 1; 2988 } else { 2989 SCTP_INP_DECR_REF(inp); 2990 SCTP_INP_WUNLOCK(inp); 2991 SCTP_INP_INFO_WUNLOCK(); 2992 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2993 return (EADDRINUSE); 2994 } 2995 } 2996 } 2997 } else { 2998 uint16_t first, last, candidate; 2999 uint16_t count; 3000 int done; 3001 3002 if (ip_inp->inp_flags & INP_HIGHPORT) { 3003 first = MODULE_GLOBAL(ipport_hifirstauto); 3004 last = MODULE_GLOBAL(ipport_hilastauto); 3005 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3006 if (p && (error = 3007 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3008 )) { 3009 SCTP_INP_DECR_REF(inp); 3010 SCTP_INP_WUNLOCK(inp); 3011 SCTP_INP_INFO_WUNLOCK(); 3012 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3013 return (error); 3014 } 3015 first = MODULE_GLOBAL(ipport_lowfirstauto); 3016 last = MODULE_GLOBAL(ipport_lowlastauto); 3017 } else { 3018 first = MODULE_GLOBAL(ipport_firstauto); 3019 last = MODULE_GLOBAL(ipport_lastauto); 3020 } 3021 if (first > last) { 3022 uint16_t temp; 3023 3024 temp = first; 3025 first = last; 3026 last = temp; 3027 } 3028 count = last - first + 1; /* number of candidates */ 3029 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3030 3031 done = 0; 3032 while (!done) { 3033 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3034 done = 1; 3035 } 3036 if (!done) { 3037 if (--count == 0) { 3038 SCTP_INP_DECR_REF(inp); 3039 SCTP_INP_WUNLOCK(inp); 3040 SCTP_INP_INFO_WUNLOCK(); 3041 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3042 return (EADDRINUSE); 3043 } 3044 if (candidate == last) 3045 candidate = first; 3046 else 3047 candidate = candidate + 1; 3048 } 3049 } 3050 lport = htons(candidate); 3051 } 3052 SCTP_INP_DECR_REF(inp); 3053 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3054 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3055 /* 3056 * this really should not happen. The guy did a non-blocking 3057 * bind and then did a close at the same time. 3058 */ 3059 SCTP_INP_WUNLOCK(inp); 3060 SCTP_INP_INFO_WUNLOCK(); 3061 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3062 return (EINVAL); 3063 } 3064 /* ok we look clear to give out this port, so lets setup the binding */ 3065 if (bindall) { 3066 /* binding to all addresses, so just set in the proper flags */ 3067 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3068 /* set the automatic addr changes from kernel flag */ 3069 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3070 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3071 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3072 } else { 3073 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3074 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3075 } 3076 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3077 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3078 } else { 3079 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3080 } 3081 /* 3082 * set the automatic mobility_base from kernel flag (by 3083 * micchie) 3084 */ 3085 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3086 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3087 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3088 } else { 3089 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3090 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3091 } 3092 /* 3093 * set the automatic mobility_fasthandoff from kernel flag 3094 * (by micchie) 3095 */ 3096 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3097 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3098 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3099 } else { 3100 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3101 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3102 } 3103 } else { 3104 /* 3105 * bind specific, make sure flags is off and add a new 3106 * address structure to the sctp_addr_list inside the ep 3107 * structure. 3108 * 3109 * We will need to allocate one and insert it at the head. The 3110 * socketopt call can just insert new addresses in there as 3111 * well. It will also have to do the embed scope kame hack 3112 * too (before adding). 3113 */ 3114 struct sctp_ifa *ifa; 3115 union sctp_sockstore store; 3116 3117 memset(&store, 0, sizeof(store)); 3118 switch (addr->sa_family) { 3119 #ifdef INET 3120 case AF_INET: 3121 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3122 store.sin.sin_port = 0; 3123 break; 3124 #endif 3125 #ifdef INET6 3126 case AF_INET6: 3127 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3128 store.sin6.sin6_port = 0; 3129 break; 3130 #endif 3131 default: 3132 break; 3133 } 3134 /* 3135 * first find the interface with the bound address need to 3136 * zero out the port to find the address! yuck! can't do 3137 * this earlier since need port for sctp_pcb_findep() 3138 */ 3139 if (sctp_ifap != NULL) { 3140 ifa = sctp_ifap; 3141 } else { 3142 /* 3143 * Note for BSD we hit here always other O/S's will 3144 * pass things in via the sctp_ifap argument 3145 * (Panda). 3146 */ 3147 ifa = sctp_find_ifa_by_addr(&store.sa, 3148 vrf_id, SCTP_ADDR_NOT_LOCKED); 3149 } 3150 if (ifa == NULL) { 3151 /* Can't find an interface with that address */ 3152 SCTP_INP_WUNLOCK(inp); 3153 SCTP_INP_INFO_WUNLOCK(); 3154 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3155 return (EADDRNOTAVAIL); 3156 } 3157 #ifdef INET6 3158 if (addr->sa_family == AF_INET6) { 3159 /* GAK, more FIXME IFA lock? */ 3160 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3161 /* Can't bind a non-existent addr. */ 3162 SCTP_INP_WUNLOCK(inp); 3163 SCTP_INP_INFO_WUNLOCK(); 3164 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3165 return (EINVAL); 3166 } 3167 } 3168 #endif 3169 /* we're not bound all */ 3170 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3171 /* allow bindx() to send ASCONF's for binding changes */ 3172 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3173 /* clear automatic addr changes from kernel flag */ 3174 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3175 3176 /* add this address to the endpoint list */ 3177 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3178 if (error != 0) { 3179 SCTP_INP_WUNLOCK(inp); 3180 SCTP_INP_INFO_WUNLOCK(); 3181 return (error); 3182 } 3183 inp->laddr_count++; 3184 } 3185 /* find the bucket */ 3186 if (port_reuse_active) { 3187 /* Put it into tcp 1-2-1 hash */ 3188 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3189 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3190 } else { 3191 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3192 } 3193 /* put it in the bucket */ 3194 LIST_INSERT_HEAD(head, inp, sctp_hash); 3195 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3196 (void *)head, ntohs(lport), port_reuse_active); 3197 /* set in the port */ 3198 inp->sctp_lport = lport; 3199 3200 /* turn off just the unbound flag */ 3201 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3202 SCTP_INP_WUNLOCK(inp); 3203 SCTP_INP_INFO_WUNLOCK(); 3204 return (0); 3205 } 3206 3207 3208 static void 3209 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3210 { 3211 struct sctp_iterator *it, *nit; 3212 3213 /* 3214 * We enter with the only the ITERATOR_LOCK in place and a write 3215 * lock on the inp_info stuff. 3216 */ 3217 it = sctp_it_ctl.cur_it; 3218 if (it && (it->vn != curvnet)) { 3219 /* Its not looking at our VNET */ 3220 return; 3221 } 3222 if (it && (it->inp == inp)) { 3223 /* 3224 * This is tricky and we hold the iterator lock, but when it 3225 * returns and gets the lock (when we release it) the 3226 * iterator will try to operate on inp. We need to stop that 3227 * from happening. But of course the iterator has a 3228 * reference on the stcb and inp. We can mark it and it will 3229 * stop. 3230 * 3231 * If its a single iterator situation, we set the end iterator 3232 * flag. Otherwise we set the iterator to go to the next 3233 * inp. 3234 * 3235 */ 3236 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3237 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3238 } else { 3239 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3240 } 3241 } 3242 /* 3243 * Now go through and remove any single reference to our inp that 3244 * may be still pending on the list 3245 */ 3246 SCTP_IPI_ITERATOR_WQ_LOCK(); 3247 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3248 if (it->vn != curvnet) { 3249 continue; 3250 } 3251 if (it->inp == inp) { 3252 /* This one points to me is it inp specific? */ 3253 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3254 /* Remove and free this one */ 3255 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3256 it, sctp_nxt_itr); 3257 if (it->function_atend != NULL) { 3258 (*it->function_atend) (it->pointer, it->val); 3259 } 3260 SCTP_FREE(it, SCTP_M_ITER); 3261 } else { 3262 it->inp = LIST_NEXT(it->inp, sctp_list); 3263 if (it->inp) { 3264 SCTP_INP_INCR_REF(it->inp); 3265 } 3266 } 3267 /* 3268 * When its put in the refcnt is incremented so decr 3269 * it 3270 */ 3271 SCTP_INP_DECR_REF(inp); 3272 } 3273 } 3274 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3275 } 3276 3277 /* release sctp_inpcb unbind the port */ 3278 void 3279 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3280 { 3281 /* 3282 * Here we free a endpoint. We must find it (if it is in the Hash 3283 * table) and remove it from there. Then we must also find it in the 3284 * overall list and remove it from there. After all removals are 3285 * complete then any timer has to be stopped. Then start the actual 3286 * freeing. a) Any local lists. b) Any associations. c) The hash of 3287 * all associations. d) finally the ep itself. 3288 */ 3289 struct sctp_tcb *asoc, *nasoc; 3290 struct sctp_laddr *laddr, *nladdr; 3291 struct inpcb *ip_pcb; 3292 struct socket *so; 3293 int being_refed = 0; 3294 struct sctp_queued_to_read *sq, *nsq; 3295 int cnt; 3296 sctp_sharedkey_t *shared_key, *nshared_key; 3297 3298 3299 #ifdef SCTP_LOG_CLOSING 3300 sctp_log_closing(inp, NULL, 0); 3301 #endif 3302 SCTP_ITERATOR_LOCK(); 3303 /* mark any iterators on the list or being processed */ 3304 sctp_iterator_inp_being_freed(inp); 3305 SCTP_ITERATOR_UNLOCK(); 3306 so = inp->sctp_socket; 3307 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3308 /* been here before.. eeks.. get out of here */ 3309 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3310 #ifdef SCTP_LOG_CLOSING 3311 sctp_log_closing(inp, NULL, 1); 3312 #endif 3313 return; 3314 } 3315 SCTP_ASOC_CREATE_LOCK(inp); 3316 SCTP_INP_INFO_WLOCK(); 3317 3318 SCTP_INP_WLOCK(inp); 3319 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3320 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3321 /* socket is gone, so no more wakeups allowed */ 3322 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3323 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3324 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3325 3326 } 3327 /* First time through we have the socket lock, after that no more. */ 3328 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3329 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3330 3331 if (inp->control) { 3332 sctp_m_freem(inp->control); 3333 inp->control = NULL; 3334 } 3335 if (inp->pkt) { 3336 sctp_m_freem(inp->pkt); 3337 inp->pkt = NULL; 3338 } 3339 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3340 * here but I will be nice :> (i.e. 3341 * ip_pcb = ep;) */ 3342 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3343 int cnt_in_sd; 3344 3345 cnt_in_sd = 0; 3346 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3347 SCTP_TCB_LOCK(asoc); 3348 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3349 /* Skip guys being freed */ 3350 cnt_in_sd++; 3351 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3352 /* 3353 * Special case - we did not start a 3354 * kill timer on the asoc due to it 3355 * was not closed. So go ahead and 3356 * start it now. 3357 */ 3358 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3359 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3360 } 3361 SCTP_TCB_UNLOCK(asoc); 3362 continue; 3363 } 3364 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3365 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3366 (asoc->asoc.total_output_queue_size == 0)) { 3367 /* 3368 * If we have data in queue, we don't want 3369 * to just free since the app may have done, 3370 * send()/close or connect/send/close. And 3371 * it wants the data to get across first. 3372 */ 3373 /* Just abandon things in the front states */ 3374 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3375 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3376 cnt_in_sd++; 3377 } 3378 continue; 3379 } 3380 /* Disconnect the socket please */ 3381 asoc->sctp_socket = NULL; 3382 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3383 if ((asoc->asoc.size_on_reasm_queue > 0) || 3384 (asoc->asoc.control_pdapi) || 3385 (asoc->asoc.size_on_all_streams > 0) || 3386 (so && (so->so_rcv.sb_cc > 0))) { 3387 /* Left with Data unread */ 3388 struct mbuf *op_err; 3389 3390 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3391 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3392 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3393 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3394 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3395 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3396 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3397 } 3398 if (sctp_free_assoc(inp, asoc, 3399 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3400 cnt_in_sd++; 3401 } 3402 continue; 3403 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3404 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3405 (asoc->asoc.stream_queue_cnt == 0)) { 3406 if (asoc->asoc.locked_on_sending) { 3407 goto abort_anyway; 3408 } 3409 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3410 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3411 struct sctp_nets *netp; 3412 3413 /* 3414 * there is nothing queued to send, 3415 * so I send shutdown 3416 */ 3417 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3418 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3419 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3420 } 3421 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3422 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3423 sctp_stop_timers_for_shutdown(asoc); 3424 if (asoc->asoc.alternate) { 3425 netp = asoc->asoc.alternate; 3426 } else { 3427 netp = asoc->asoc.primary_destination; 3428 } 3429 sctp_send_shutdown(asoc, netp); 3430 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3431 netp); 3432 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3433 asoc->asoc.primary_destination); 3434 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3435 } 3436 } else { 3437 /* mark into shutdown pending */ 3438 struct sctp_stream_queue_pending *sp; 3439 3440 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3441 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3442 asoc->asoc.primary_destination); 3443 if (asoc->asoc.locked_on_sending) { 3444 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3445 sctp_streamhead); 3446 if (sp == NULL) { 3447 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3448 (void *)asoc->asoc.locked_on_sending, 3449 asoc->asoc.locked_on_sending->stream_no); 3450 } else { 3451 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3452 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3453 } 3454 } 3455 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3456 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3457 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3458 struct mbuf *op_err; 3459 3460 abort_anyway: 3461 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3462 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3463 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3464 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3465 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3466 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3467 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3468 } 3469 if (sctp_free_assoc(inp, asoc, 3470 SCTP_PCBFREE_NOFORCE, 3471 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3472 cnt_in_sd++; 3473 } 3474 continue; 3475 } else { 3476 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3477 } 3478 } 3479 cnt_in_sd++; 3480 SCTP_TCB_UNLOCK(asoc); 3481 } 3482 /* now is there some left in our SHUTDOWN state? */ 3483 if (cnt_in_sd) { 3484 #ifdef SCTP_LOG_CLOSING 3485 sctp_log_closing(inp, NULL, 2); 3486 #endif 3487 inp->sctp_socket = NULL; 3488 SCTP_INP_WUNLOCK(inp); 3489 SCTP_ASOC_CREATE_UNLOCK(inp); 3490 SCTP_INP_INFO_WUNLOCK(); 3491 return; 3492 } 3493 } 3494 inp->sctp_socket = NULL; 3495 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3496 SCTP_PCB_FLAGS_UNBOUND) { 3497 /* 3498 * ok, this guy has been bound. It's port is somewhere in 3499 * the SCTP_BASE_INFO(hash table). Remove it! 3500 */ 3501 LIST_REMOVE(inp, sctp_hash); 3502 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3503 } 3504 /* 3505 * If there is a timer running to kill us, forget it, since it may 3506 * have a contest on the INP lock.. which would cause us to die ... 3507 */ 3508 cnt = 0; 3509 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3510 SCTP_TCB_LOCK(asoc); 3511 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3512 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3513 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3514 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3515 } 3516 cnt++; 3517 SCTP_TCB_UNLOCK(asoc); 3518 continue; 3519 } 3520 /* Free associations that are NOT killing us */ 3521 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3522 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3523 struct mbuf *op_err; 3524 3525 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3526 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3527 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3528 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3529 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3530 cnt++; 3531 SCTP_TCB_UNLOCK(asoc); 3532 continue; 3533 } 3534 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3535 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3536 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3537 } 3538 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3539 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3540 cnt++; 3541 } 3542 } 3543 if (cnt) { 3544 /* Ok we have someone out there that will kill us */ 3545 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3546 #ifdef SCTP_LOG_CLOSING 3547 sctp_log_closing(inp, NULL, 3); 3548 #endif 3549 SCTP_INP_WUNLOCK(inp); 3550 SCTP_ASOC_CREATE_UNLOCK(inp); 3551 SCTP_INP_INFO_WUNLOCK(); 3552 return; 3553 } 3554 if (SCTP_INP_LOCK_CONTENDED(inp)) 3555 being_refed++; 3556 if (SCTP_INP_READ_CONTENDED(inp)) 3557 being_refed++; 3558 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3559 being_refed++; 3560 3561 if ((inp->refcount) || 3562 (being_refed) || 3563 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3564 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3565 #ifdef SCTP_LOG_CLOSING 3566 sctp_log_closing(inp, NULL, 4); 3567 #endif 3568 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3569 SCTP_INP_WUNLOCK(inp); 3570 SCTP_ASOC_CREATE_UNLOCK(inp); 3571 SCTP_INP_INFO_WUNLOCK(); 3572 return; 3573 } 3574 inp->sctp_ep.signature_change.type = 0; 3575 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3576 /* 3577 * Remove it from the list .. last thing we need a lock for. 3578 */ 3579 LIST_REMOVE(inp, sctp_list); 3580 SCTP_INP_WUNLOCK(inp); 3581 SCTP_ASOC_CREATE_UNLOCK(inp); 3582 SCTP_INP_INFO_WUNLOCK(); 3583 /* 3584 * Now we release all locks. Since this INP cannot be found anymore 3585 * except possibly by the kill timer that might be running. We call 3586 * the drain function here. It should hit the case were it sees the 3587 * ACTIVE flag cleared and exit out freeing us to proceed and 3588 * destroy everything. 3589 */ 3590 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3591 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3592 } else { 3593 /* Probably un-needed */ 3594 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3595 } 3596 3597 #ifdef SCTP_LOG_CLOSING 3598 sctp_log_closing(inp, NULL, 5); 3599 #endif 3600 3601 3602 if ((inp->sctp_asocidhash) != NULL) { 3603 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3604 inp->sctp_asocidhash = NULL; 3605 } 3606 /* sa_ignore FREED_MEMORY */ 3607 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3608 /* Its only abandoned if it had data left */ 3609 if (sq->length) 3610 SCTP_STAT_INCR(sctps_left_abandon); 3611 3612 TAILQ_REMOVE(&inp->read_queue, sq, next); 3613 sctp_free_remote_addr(sq->whoFrom); 3614 if (so) 3615 so->so_rcv.sb_cc -= sq->length; 3616 if (sq->data) { 3617 sctp_m_freem(sq->data); 3618 sq->data = NULL; 3619 } 3620 /* 3621 * no need to free the net count, since at this point all 3622 * assoc's are gone. 3623 */ 3624 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3625 SCTP_DECR_READQ_COUNT(); 3626 } 3627 /* Now the sctp_pcb things */ 3628 /* 3629 * free each asoc if it is not already closed/free. we can't use the 3630 * macro here since le_next will get freed as part of the 3631 * sctp_free_assoc() call. 3632 */ 3633 #ifdef IPSEC 3634 ipsec_delete_pcbpolicy(ip_pcb); 3635 #endif 3636 if (ip_pcb->inp_options) { 3637 (void)sctp_m_free(ip_pcb->inp_options); 3638 ip_pcb->inp_options = 0; 3639 } 3640 #ifdef INET6 3641 if (ip_pcb->inp_vflag & INP_IPV6) { 3642 struct in6pcb *in6p; 3643 3644 in6p = (struct in6pcb *)inp; 3645 ip6_freepcbopts(in6p->in6p_outputopts); 3646 } 3647 #endif /* INET6 */ 3648 ip_pcb->inp_vflag = 0; 3649 /* free up authentication fields */ 3650 if (inp->sctp_ep.local_auth_chunks != NULL) 3651 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3652 if (inp->sctp_ep.local_hmacs != NULL) 3653 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3654 3655 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3656 LIST_REMOVE(shared_key, next); 3657 sctp_free_sharedkey(shared_key); 3658 /* sa_ignore FREED_MEMORY */ 3659 } 3660 3661 /* 3662 * if we have an address list the following will free the list of 3663 * ifaddr's that are set into this ep. Again macro limitations here, 3664 * since the LIST_FOREACH could be a bad idea. 3665 */ 3666 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3667 sctp_remove_laddr(laddr); 3668 } 3669 3670 #ifdef SCTP_TRACK_FREED_ASOCS 3671 /* TEMP CODE */ 3672 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3673 LIST_REMOVE(asoc, sctp_tcblist); 3674 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3675 SCTP_DECR_ASOC_COUNT(); 3676 } 3677 /* *** END TEMP CODE *** */ 3678 #endif 3679 /* Now lets see about freeing the EP hash table. */ 3680 if (inp->sctp_tcbhash != NULL) { 3681 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3682 inp->sctp_tcbhash = NULL; 3683 } 3684 /* Now we must put the ep memory back into the zone pool */ 3685 crfree(inp->ip_inp.inp.inp_cred); 3686 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3687 SCTP_INP_LOCK_DESTROY(inp); 3688 SCTP_INP_READ_DESTROY(inp); 3689 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3690 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3691 SCTP_DECR_EP_COUNT(); 3692 } 3693 3694 3695 struct sctp_nets * 3696 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3697 { 3698 struct sctp_nets *net; 3699 3700 /* locate the address */ 3701 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3702 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3703 return (net); 3704 } 3705 return (NULL); 3706 } 3707 3708 3709 int 3710 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3711 { 3712 struct sctp_ifa *sctp_ifa; 3713 3714 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3715 if (sctp_ifa) { 3716 return (1); 3717 } else { 3718 return (0); 3719 } 3720 } 3721 3722 /* 3723 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3724 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3725 * stats of stuff. 3726 */ 3727 int 3728 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3729 struct sctp_nets **netp, int set_scope, int from) 3730 { 3731 /* 3732 * The following is redundant to the same lines in the 3733 * sctp_aloc_assoc() but is needed since others call the add address 3734 * function 3735 */ 3736 struct sctp_nets *net, *netfirst; 3737 int addr_inscope; 3738 3739 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3740 from); 3741 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3742 3743 netfirst = sctp_findnet(stcb, newaddr); 3744 if (netfirst) { 3745 /* 3746 * Lie and return ok, we don't want to make the association 3747 * go away for this behavior. It will happen in the TCP 3748 * model in a connected socket. It does not reach the hash 3749 * table until after the association is built so it can't be 3750 * found. Mark as reachable, since the initial creation will 3751 * have been cleared and the NOT_IN_ASSOC flag will have 3752 * been added... and we don't want to end up removing it 3753 * back out. 3754 */ 3755 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3756 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3757 SCTP_ADDR_UNCONFIRMED); 3758 } else { 3759 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3760 } 3761 3762 return (0); 3763 } 3764 addr_inscope = 1; 3765 switch (newaddr->sa_family) { 3766 #ifdef INET 3767 case AF_INET: 3768 { 3769 struct sockaddr_in *sin; 3770 3771 sin = (struct sockaddr_in *)newaddr; 3772 if (sin->sin_addr.s_addr == 0) { 3773 /* Invalid address */ 3774 return (-1); 3775 } 3776 /* zero out the bzero area */ 3777 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3778 3779 /* assure len is set */ 3780 sin->sin_len = sizeof(struct sockaddr_in); 3781 if (set_scope) { 3782 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3783 stcb->asoc.scope.ipv4_local_scope = 1; 3784 } 3785 } else { 3786 /* Validate the address is in scope */ 3787 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3788 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3789 addr_inscope = 0; 3790 } 3791 } 3792 break; 3793 } 3794 #endif 3795 #ifdef INET6 3796 case AF_INET6: 3797 { 3798 struct sockaddr_in6 *sin6; 3799 3800 sin6 = (struct sockaddr_in6 *)newaddr; 3801 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3802 /* Invalid address */ 3803 return (-1); 3804 } 3805 /* assure len is set */ 3806 sin6->sin6_len = sizeof(struct sockaddr_in6); 3807 if (set_scope) { 3808 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3809 stcb->asoc.scope.loopback_scope = 1; 3810 stcb->asoc.scope.local_scope = 0; 3811 stcb->asoc.scope.ipv4_local_scope = 1; 3812 stcb->asoc.scope.site_scope = 1; 3813 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3814 /* 3815 * If the new destination is a 3816 * LINK_LOCAL we must have common 3817 * site scope. Don't set the local 3818 * scope since we may not share all 3819 * links, only loopback can do this. 3820 * Links on the local network would 3821 * also be on our private network 3822 * for v4 too. 3823 */ 3824 stcb->asoc.scope.ipv4_local_scope = 1; 3825 stcb->asoc.scope.site_scope = 1; 3826 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3827 /* 3828 * If the new destination is 3829 * SITE_LOCAL then we must have site 3830 * scope in common. 3831 */ 3832 stcb->asoc.scope.site_scope = 1; 3833 } 3834 } else { 3835 /* Validate the address is in scope */ 3836 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3837 (stcb->asoc.scope.loopback_scope == 0)) { 3838 addr_inscope = 0; 3839 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3840 (stcb->asoc.scope.local_scope == 0)) { 3841 addr_inscope = 0; 3842 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3843 (stcb->asoc.scope.site_scope == 0)) { 3844 addr_inscope = 0; 3845 } 3846 } 3847 break; 3848 } 3849 #endif 3850 default: 3851 /* not supported family type */ 3852 return (-1); 3853 } 3854 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3855 if (net == NULL) { 3856 return (-1); 3857 } 3858 SCTP_INCR_RADDR_COUNT(); 3859 bzero(net, sizeof(struct sctp_nets)); 3860 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3861 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3862 switch (newaddr->sa_family) { 3863 #ifdef INET 3864 case AF_INET: 3865 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3866 break; 3867 #endif 3868 #ifdef INET6 3869 case AF_INET6: 3870 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3871 break; 3872 #endif 3873 default: 3874 break; 3875 } 3876 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3877 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3878 stcb->asoc.scope.loopback_scope = 1; 3879 stcb->asoc.scope.ipv4_local_scope = 1; 3880 stcb->asoc.scope.local_scope = 0; 3881 stcb->asoc.scope.site_scope = 1; 3882 addr_inscope = 1; 3883 } 3884 net->failure_threshold = stcb->asoc.def_net_failure; 3885 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3886 if (addr_inscope == 0) { 3887 net->dest_state = (SCTP_ADDR_REACHABLE | 3888 SCTP_ADDR_OUT_OF_SCOPE); 3889 } else { 3890 if (from == SCTP_ADDR_IS_CONFIRMED) 3891 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3892 net->dest_state = SCTP_ADDR_REACHABLE; 3893 else 3894 net->dest_state = SCTP_ADDR_REACHABLE | 3895 SCTP_ADDR_UNCONFIRMED; 3896 } 3897 /* 3898 * We set this to 0, the timer code knows that this means its an 3899 * initial value 3900 */ 3901 net->rto_needed = 1; 3902 net->RTO = 0; 3903 net->RTO_measured = 0; 3904 stcb->asoc.numnets++; 3905 net->ref_count = 1; 3906 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3907 net->port = stcb->asoc.port; 3908 net->dscp = stcb->asoc.default_dscp; 3909 #ifdef INET6 3910 net->flowlabel = stcb->asoc.default_flowlabel; 3911 #endif 3912 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3913 net->dest_state |= SCTP_ADDR_NOHB; 3914 } else { 3915 net->dest_state &= ~SCTP_ADDR_NOHB; 3916 } 3917 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3918 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3919 } else { 3920 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3921 } 3922 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3923 /* Init the timer structure */ 3924 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3925 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3926 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3927 3928 /* Now generate a route for this guy */ 3929 #ifdef INET6 3930 /* KAME hack: embed scopeid */ 3931 if (newaddr->sa_family == AF_INET6) { 3932 struct sockaddr_in6 *sin6; 3933 3934 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3935 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3936 sin6->sin6_scope_id = 0; 3937 } 3938 #endif 3939 SCTP_RTALLOC((sctp_route_t *) & net->ro, 3940 stcb->asoc.vrf_id, 3941 stcb->sctp_ep->fibnum); 3942 3943 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3944 /* Get source address */ 3945 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3946 stcb, 3947 (sctp_route_t *) & net->ro, 3948 net, 3949 0, 3950 stcb->asoc.vrf_id); 3951 if (net->ro._s_addr != NULL) { 3952 net->src_addr_selected = 1; 3953 /* Now get the interface MTU */ 3954 if (net->ro._s_addr->ifn_p != NULL) { 3955 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3956 } 3957 } else { 3958 net->src_addr_selected = 0; 3959 } 3960 if (net->mtu > 0) { 3961 uint32_t rmtu; 3962 3963 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3964 if (rmtu == 0) { 3965 /* 3966 * Start things off to match mtu of 3967 * interface please. 3968 */ 3969 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3970 net->ro.ro_rt, net->mtu); 3971 } else { 3972 /* 3973 * we take the route mtu over the interface, 3974 * since the route may be leading out the 3975 * loopback, or a different interface. 3976 */ 3977 net->mtu = rmtu; 3978 } 3979 } 3980 } else { 3981 net->src_addr_selected = 0; 3982 } 3983 if (net->mtu == 0) { 3984 switch (newaddr->sa_family) { 3985 #ifdef INET 3986 case AF_INET: 3987 net->mtu = SCTP_DEFAULT_MTU; 3988 break; 3989 #endif 3990 #ifdef INET6 3991 case AF_INET6: 3992 net->mtu = 1280; 3993 break; 3994 #endif 3995 default: 3996 break; 3997 } 3998 } 3999 #if defined(INET) || defined(INET6) 4000 if (net->port) { 4001 net->mtu -= (uint32_t) sizeof(struct udphdr); 4002 } 4003 #endif 4004 if (from == SCTP_ALLOC_ASOC) { 4005 stcb->asoc.smallest_mtu = net->mtu; 4006 } 4007 if (stcb->asoc.smallest_mtu > net->mtu) { 4008 stcb->asoc.smallest_mtu = net->mtu; 4009 } 4010 #ifdef INET6 4011 if (newaddr->sa_family == AF_INET6) { 4012 struct sockaddr_in6 *sin6; 4013 4014 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4015 (void)sa6_recoverscope(sin6); 4016 } 4017 #endif 4018 4019 /* JRS - Use the congestion control given in the CC module */ 4020 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4021 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4022 4023 /* 4024 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4025 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4026 */ 4027 net->find_pseudo_cumack = 1; 4028 net->find_rtx_pseudo_cumack = 1; 4029 /* Choose an initial flowid. */ 4030 net->flowid = stcb->asoc.my_vtag ^ 4031 ntohs(stcb->rport) ^ 4032 ntohs(stcb->sctp_ep->sctp_lport); 4033 net->flowtype = M_HASHTYPE_OPAQUE; 4034 if (netp) { 4035 *netp = net; 4036 } 4037 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4038 if (net->ro.ro_rt == NULL) { 4039 /* Since we have no route put it at the back */ 4040 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4041 } else if (netfirst == NULL) { 4042 /* We are the first one in the pool. */ 4043 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4044 } else if (netfirst->ro.ro_rt == NULL) { 4045 /* 4046 * First one has NO route. Place this one ahead of the first 4047 * one. 4048 */ 4049 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4050 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4051 /* 4052 * This one has a different interface than the one at the 4053 * top of the list. Place it ahead. 4054 */ 4055 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4056 } else { 4057 /* 4058 * Ok we have the same interface as the first one. Move 4059 * forward until we find either a) one with a NULL route... 4060 * insert ahead of that b) one with a different ifp.. insert 4061 * after that. c) end of the list.. insert at the tail. 4062 */ 4063 struct sctp_nets *netlook; 4064 4065 do { 4066 netlook = TAILQ_NEXT(netfirst, sctp_next); 4067 if (netlook == NULL) { 4068 /* End of the list */ 4069 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4070 break; 4071 } else if (netlook->ro.ro_rt == NULL) { 4072 /* next one has NO route */ 4073 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4074 break; 4075 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4076 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4077 net, sctp_next); 4078 break; 4079 } 4080 /* Shift forward */ 4081 netfirst = netlook; 4082 } while (netlook != NULL); 4083 } 4084 4085 /* got to have a primary set */ 4086 if (stcb->asoc.primary_destination == 0) { 4087 stcb->asoc.primary_destination = net; 4088 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4089 (net->ro.ro_rt) && 4090 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4091 /* No route to current primary adopt new primary */ 4092 stcb->asoc.primary_destination = net; 4093 } 4094 /* Validate primary is first */ 4095 net = TAILQ_FIRST(&stcb->asoc.nets); 4096 if ((net != stcb->asoc.primary_destination) && 4097 (stcb->asoc.primary_destination)) { 4098 /* 4099 * first one on the list is NOT the primary sctp_cmpaddr() 4100 * is much more efficient if the primary is the first on the 4101 * list, make it so. 4102 */ 4103 TAILQ_REMOVE(&stcb->asoc.nets, 4104 stcb->asoc.primary_destination, sctp_next); 4105 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4106 stcb->asoc.primary_destination, sctp_next); 4107 } 4108 return (0); 4109 } 4110 4111 4112 static uint32_t 4113 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4114 { 4115 uint32_t id; 4116 struct sctpasochead *head; 4117 struct sctp_tcb *lstcb; 4118 4119 SCTP_INP_WLOCK(inp); 4120 try_again: 4121 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4122 /* TSNH */ 4123 SCTP_INP_WUNLOCK(inp); 4124 return (0); 4125 } 4126 /* 4127 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4128 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4129 */ 4130 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4131 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4132 } 4133 id = inp->sctp_associd_counter; 4134 inp->sctp_associd_counter++; 4135 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4136 if (lstcb) { 4137 goto try_again; 4138 } 4139 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4140 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4141 stcb->asoc.in_asocid_hash = 1; 4142 SCTP_INP_WUNLOCK(inp); 4143 return id; 4144 } 4145 4146 /* 4147 * allocate an association and add it to the endpoint. The caller must be 4148 * careful to add all additional addresses once they are know right away or 4149 * else the assoc will be may experience a blackout scenario. 4150 */ 4151 struct sctp_tcb * 4152 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4153 int *error, uint32_t override_tag, uint32_t vrf_id, 4154 uint16_t o_streams, 4155 struct thread *p 4156 ) 4157 { 4158 /* note the p argument is only valid in unbound sockets */ 4159 4160 struct sctp_tcb *stcb; 4161 struct sctp_association *asoc; 4162 struct sctpasochead *head; 4163 uint16_t rport; 4164 int err; 4165 4166 /* 4167 * Assumption made here: Caller has done a 4168 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4169 * address does not exist already. 4170 */ 4171 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4172 /* Hit max assoc, sorry no more */ 4173 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4174 *error = ENOBUFS; 4175 return (NULL); 4176 } 4177 if (firstaddr == NULL) { 4178 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4179 *error = EINVAL; 4180 return (NULL); 4181 } 4182 SCTP_INP_RLOCK(inp); 4183 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4184 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4185 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4186 /* 4187 * If its in the TCP pool, its NOT allowed to create an 4188 * association. The parent listener needs to call 4189 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4190 * off, or connected one does this.. its an error. 4191 */ 4192 SCTP_INP_RUNLOCK(inp); 4193 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4194 *error = EINVAL; 4195 return (NULL); 4196 } 4197 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4198 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4199 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4200 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4201 SCTP_INP_RUNLOCK(inp); 4202 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4203 *error = EINVAL; 4204 return (NULL); 4205 } 4206 } 4207 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4208 #ifdef SCTP_DEBUG 4209 if (firstaddr) { 4210 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4211 switch (firstaddr->sa_family) { 4212 #ifdef INET 4213 case AF_INET: 4214 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4215 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4216 break; 4217 #endif 4218 #ifdef INET6 4219 case AF_INET6: 4220 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4221 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4222 break; 4223 #endif 4224 default: 4225 break; 4226 } 4227 } else { 4228 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4229 } 4230 #endif /* SCTP_DEBUG */ 4231 switch (firstaddr->sa_family) { 4232 #ifdef INET 4233 case AF_INET: 4234 { 4235 struct sockaddr_in *sin; 4236 4237 sin = (struct sockaddr_in *)firstaddr; 4238 if ((ntohs(sin->sin_port) == 0) || 4239 (sin->sin_addr.s_addr == INADDR_ANY) || 4240 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4241 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4242 /* Invalid address */ 4243 SCTP_INP_RUNLOCK(inp); 4244 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4245 *error = EINVAL; 4246 return (NULL); 4247 } 4248 rport = sin->sin_port; 4249 break; 4250 } 4251 #endif 4252 #ifdef INET6 4253 case AF_INET6: 4254 { 4255 struct sockaddr_in6 *sin6; 4256 4257 sin6 = (struct sockaddr_in6 *)firstaddr; 4258 if ((ntohs(sin6->sin6_port) == 0) || 4259 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4260 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4261 /* Invalid address */ 4262 SCTP_INP_RUNLOCK(inp); 4263 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4264 *error = EINVAL; 4265 return (NULL); 4266 } 4267 rport = sin6->sin6_port; 4268 break; 4269 } 4270 #endif 4271 default: 4272 /* not supported family type */ 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 SCTP_INP_RUNLOCK(inp); 4279 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4280 /* 4281 * If you have not performed a bind, then we need to do the 4282 * ephemeral bind for you. 4283 */ 4284 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4285 (struct sockaddr *)NULL, 4286 (struct sctp_ifa *)NULL, 4287 p 4288 ))) { 4289 /* bind error, probably perm */ 4290 *error = err; 4291 return (NULL); 4292 } 4293 } 4294 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4295 if (stcb == NULL) { 4296 /* out of memory? */ 4297 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4298 *error = ENOMEM; 4299 return (NULL); 4300 } 4301 SCTP_INCR_ASOC_COUNT(); 4302 4303 bzero(stcb, sizeof(*stcb)); 4304 asoc = &stcb->asoc; 4305 4306 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4307 SCTP_TCB_LOCK_INIT(stcb); 4308 SCTP_TCB_SEND_LOCK_INIT(stcb); 4309 stcb->rport = rport; 4310 /* setup back pointer's */ 4311 stcb->sctp_ep = inp; 4312 stcb->sctp_socket = inp->sctp_socket; 4313 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4314 /* failed */ 4315 SCTP_TCB_LOCK_DESTROY(stcb); 4316 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4317 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4318 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4319 SCTP_DECR_ASOC_COUNT(); 4320 *error = err; 4321 return (NULL); 4322 } 4323 /* and the port */ 4324 SCTP_INP_INFO_WLOCK(); 4325 SCTP_INP_WLOCK(inp); 4326 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4327 /* inpcb freed while alloc going on */ 4328 SCTP_TCB_LOCK_DESTROY(stcb); 4329 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4330 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4331 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4332 SCTP_INP_WUNLOCK(inp); 4333 SCTP_INP_INFO_WUNLOCK(); 4334 SCTP_DECR_ASOC_COUNT(); 4335 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4336 *error = EINVAL; 4337 return (NULL); 4338 } 4339 SCTP_TCB_LOCK(stcb); 4340 4341 /* now that my_vtag is set, add it to the hash */ 4342 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4343 /* put it in the bucket in the vtag hash of assoc's for the system */ 4344 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4345 SCTP_INP_INFO_WUNLOCK(); 4346 4347 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4348 /* failure.. memory error? */ 4349 if (asoc->strmout) { 4350 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4351 asoc->strmout = NULL; 4352 } 4353 if (asoc->mapping_array) { 4354 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4355 asoc->mapping_array = NULL; 4356 } 4357 if (asoc->nr_mapping_array) { 4358 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4359 asoc->nr_mapping_array = NULL; 4360 } 4361 SCTP_DECR_ASOC_COUNT(); 4362 SCTP_TCB_UNLOCK(stcb); 4363 SCTP_TCB_LOCK_DESTROY(stcb); 4364 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4365 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4366 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4367 SCTP_INP_WUNLOCK(inp); 4368 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4369 *error = ENOBUFS; 4370 return (NULL); 4371 } 4372 /* Init all the timers */ 4373 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4374 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4375 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4376 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4377 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4378 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4379 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4380 4381 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4382 /* now file the port under the hash as well */ 4383 if (inp->sctp_tcbhash != NULL) { 4384 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4385 inp->sctp_hashmark)]; 4386 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4387 } 4388 SCTP_INP_WUNLOCK(inp); 4389 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4390 return (stcb); 4391 } 4392 4393 4394 void 4395 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4396 { 4397 struct sctp_association *asoc; 4398 4399 asoc = &stcb->asoc; 4400 asoc->numnets--; 4401 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4402 if (net == asoc->primary_destination) { 4403 /* Reset primary */ 4404 struct sctp_nets *lnet; 4405 4406 lnet = TAILQ_FIRST(&asoc->nets); 4407 /* 4408 * Mobility adaptation Ideally, if deleted destination is 4409 * the primary, it becomes a fast retransmission trigger by 4410 * the subsequent SET PRIMARY. (by micchie) 4411 */ 4412 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4413 SCTP_MOBILITY_BASE) || 4414 sctp_is_mobility_feature_on(stcb->sctp_ep, 4415 SCTP_MOBILITY_FASTHANDOFF)) { 4416 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4417 if (asoc->deleted_primary != NULL) { 4418 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4419 goto out; 4420 } 4421 asoc->deleted_primary = net; 4422 atomic_add_int(&net->ref_count, 1); 4423 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4424 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4425 sctp_mobility_feature_on(stcb->sctp_ep, 4426 SCTP_MOBILITY_PRIM_DELETED); 4427 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4428 stcb->sctp_ep, stcb, NULL); 4429 } 4430 out: 4431 /* Try to find a confirmed primary */ 4432 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4433 } 4434 if (net == asoc->last_data_chunk_from) { 4435 /* Reset primary */ 4436 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4437 } 4438 if (net == asoc->last_control_chunk_from) { 4439 /* Clear net */ 4440 asoc->last_control_chunk_from = NULL; 4441 } 4442 if (net == stcb->asoc.alternate) { 4443 sctp_free_remote_addr(stcb->asoc.alternate); 4444 stcb->asoc.alternate = NULL; 4445 } 4446 sctp_free_remote_addr(net); 4447 } 4448 4449 /* 4450 * remove a remote endpoint address from an association, it will fail if the 4451 * address does not exist. 4452 */ 4453 int 4454 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4455 { 4456 /* 4457 * Here we need to remove a remote address. This is quite simple, we 4458 * first find it in the list of address for the association 4459 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4460 * on that item. Note we do not allow it to be removed if there are 4461 * no other addresses. 4462 */ 4463 struct sctp_association *asoc; 4464 struct sctp_nets *net, *nnet; 4465 4466 asoc = &stcb->asoc; 4467 4468 /* locate the address */ 4469 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4470 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4471 continue; 4472 } 4473 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4474 remaddr)) { 4475 /* we found the guy */ 4476 if (asoc->numnets < 2) { 4477 /* Must have at LEAST two remote addresses */ 4478 return (-1); 4479 } else { 4480 sctp_remove_net(stcb, net); 4481 return (0); 4482 } 4483 } 4484 } 4485 /* not found. */ 4486 return (-2); 4487 } 4488 4489 void 4490 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4491 { 4492 struct sctpvtaghead *chain; 4493 struct sctp_tagblock *twait_block; 4494 int found = 0; 4495 int i; 4496 4497 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4498 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4499 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4500 if ((twait_block->vtag_block[i].v_tag == tag) && 4501 (twait_block->vtag_block[i].lport == lport) && 4502 (twait_block->vtag_block[i].rport == rport)) { 4503 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4504 twait_block->vtag_block[i].v_tag = 0; 4505 twait_block->vtag_block[i].lport = 0; 4506 twait_block->vtag_block[i].rport = 0; 4507 found = 1; 4508 break; 4509 } 4510 } 4511 if (found) 4512 break; 4513 } 4514 } 4515 4516 int 4517 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4518 { 4519 struct sctpvtaghead *chain; 4520 struct sctp_tagblock *twait_block; 4521 int found = 0; 4522 int i; 4523 4524 SCTP_INP_INFO_WLOCK(); 4525 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4526 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4527 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4528 if ((twait_block->vtag_block[i].v_tag == tag) && 4529 (twait_block->vtag_block[i].lport == lport) && 4530 (twait_block->vtag_block[i].rport == rport)) { 4531 found = 1; 4532 break; 4533 } 4534 } 4535 if (found) 4536 break; 4537 } 4538 SCTP_INP_INFO_WUNLOCK(); 4539 return (found); 4540 } 4541 4542 4543 void 4544 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4545 { 4546 struct sctpvtaghead *chain; 4547 struct sctp_tagblock *twait_block; 4548 struct timeval now; 4549 int set, i; 4550 4551 if (time == 0) { 4552 /* Its disabled */ 4553 return; 4554 } 4555 (void)SCTP_GETTIME_TIMEVAL(&now); 4556 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4557 set = 0; 4558 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4559 /* Block(s) present, lets find space, and expire on the fly */ 4560 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4561 if ((twait_block->vtag_block[i].v_tag == 0) && 4562 !set) { 4563 twait_block->vtag_block[i].tv_sec_at_expire = 4564 now.tv_sec + time; 4565 twait_block->vtag_block[i].v_tag = tag; 4566 twait_block->vtag_block[i].lport = lport; 4567 twait_block->vtag_block[i].rport = rport; 4568 set = 1; 4569 } else if ((twait_block->vtag_block[i].v_tag) && 4570 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4571 /* Audit expires this guy */ 4572 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4573 twait_block->vtag_block[i].v_tag = 0; 4574 twait_block->vtag_block[i].lport = 0; 4575 twait_block->vtag_block[i].rport = 0; 4576 if (set == 0) { 4577 /* Reuse it for my new tag */ 4578 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4579 twait_block->vtag_block[i].v_tag = tag; 4580 twait_block->vtag_block[i].lport = lport; 4581 twait_block->vtag_block[i].rport = rport; 4582 set = 1; 4583 } 4584 } 4585 } 4586 if (set) { 4587 /* 4588 * We only do up to the block where we can place our 4589 * tag for audits 4590 */ 4591 break; 4592 } 4593 } 4594 /* Need to add a new block to chain */ 4595 if (!set) { 4596 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4597 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4598 if (twait_block == NULL) { 4599 #ifdef INVARIANTS 4600 panic("Can not alloc tagblock"); 4601 #endif 4602 return; 4603 } 4604 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4605 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4606 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4607 twait_block->vtag_block[0].v_tag = tag; 4608 twait_block->vtag_block[0].lport = lport; 4609 twait_block->vtag_block[0].rport = rport; 4610 } 4611 } 4612 4613 4614 4615 /*- 4616 * Free the association after un-hashing the remote port. This 4617 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4618 * expect that the input to this function IS a locked TCB. 4619 * It will return 0, if it did NOT destroy the association (instead 4620 * it unlocks it. It will return NON-zero if it either destroyed the 4621 * association OR the association is already destroyed. 4622 */ 4623 int 4624 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4625 { 4626 int i; 4627 struct sctp_association *asoc; 4628 struct sctp_nets *net, *nnet; 4629 struct sctp_laddr *laddr, *naddr; 4630 struct sctp_tmit_chunk *chk, *nchk; 4631 struct sctp_asconf_addr *aparam, *naparam; 4632 struct sctp_asconf_ack *aack, *naack; 4633 struct sctp_stream_reset_list *strrst, *nstrrst; 4634 struct sctp_queued_to_read *sq, *nsq; 4635 struct sctp_stream_queue_pending *sp, *nsp; 4636 sctp_sharedkey_t *shared_key, *nshared_key; 4637 struct socket *so; 4638 4639 /* first, lets purge the entry from the hash table. */ 4640 4641 #ifdef SCTP_LOG_CLOSING 4642 sctp_log_closing(inp, stcb, 6); 4643 #endif 4644 if (stcb->asoc.state == 0) { 4645 #ifdef SCTP_LOG_CLOSING 4646 sctp_log_closing(inp, NULL, 7); 4647 #endif 4648 /* there is no asoc, really TSNH :-0 */ 4649 return (1); 4650 } 4651 if (stcb->asoc.alternate) { 4652 sctp_free_remote_addr(stcb->asoc.alternate); 4653 stcb->asoc.alternate = NULL; 4654 } 4655 /* TEMP CODE */ 4656 if (stcb->freed_from_where == 0) { 4657 /* Only record the first place free happened from */ 4658 stcb->freed_from_where = from_location; 4659 } 4660 /* TEMP CODE */ 4661 4662 asoc = &stcb->asoc; 4663 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4664 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4665 /* nothing around */ 4666 so = NULL; 4667 else 4668 so = inp->sctp_socket; 4669 4670 /* 4671 * We used timer based freeing if a reader or writer is in the way. 4672 * So we first check if we are actually being called from a timer, 4673 * if so we abort early if a reader or writer is still in the way. 4674 */ 4675 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4676 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4677 /* 4678 * is it the timer driving us? if so are the reader/writers 4679 * gone? 4680 */ 4681 if (stcb->asoc.refcnt) { 4682 /* nope, reader or writer in the way */ 4683 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4684 /* no asoc destroyed */ 4685 SCTP_TCB_UNLOCK(stcb); 4686 #ifdef SCTP_LOG_CLOSING 4687 sctp_log_closing(inp, stcb, 8); 4688 #endif 4689 return (0); 4690 } 4691 } 4692 /* now clean up any other timers */ 4693 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4694 asoc->dack_timer.self = NULL; 4695 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4696 /*- 4697 * For stream reset we don't blast this unless 4698 * it is a str-reset timer, it might be the 4699 * free-asoc timer which we DON'T want to 4700 * disturb. 4701 */ 4702 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4703 asoc->strreset_timer.self = NULL; 4704 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4705 asoc->asconf_timer.self = NULL; 4706 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4707 asoc->autoclose_timer.self = NULL; 4708 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4709 asoc->shut_guard_timer.self = NULL; 4710 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4711 asoc->delayed_event_timer.self = NULL; 4712 /* Mobility adaptation */ 4713 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4714 asoc->delete_prim_timer.self = NULL; 4715 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4716 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4717 net->rxt_timer.self = NULL; 4718 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4719 net->pmtu_timer.self = NULL; 4720 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4721 net->hb_timer.self = NULL; 4722 } 4723 /* Now the read queue needs to be cleaned up (only once) */ 4724 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4725 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4726 SCTP_INP_READ_LOCK(inp); 4727 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4728 if (sq->stcb == stcb) { 4729 sq->do_not_ref_stcb = 1; 4730 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4731 /* 4732 * If there is no end, there never will be 4733 * now. 4734 */ 4735 if (sq->end_added == 0) { 4736 /* Held for PD-API clear that. */ 4737 sq->pdapi_aborted = 1; 4738 sq->held_length = 0; 4739 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4740 /* 4741 * Need to add a PD-API 4742 * aborted indication. 4743 * Setting the control_pdapi 4744 * assures that it will be 4745 * added right after this 4746 * msg. 4747 */ 4748 uint32_t strseq; 4749 4750 stcb->asoc.control_pdapi = sq; 4751 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4752 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4753 stcb, 4754 SCTP_PARTIAL_DELIVERY_ABORTED, 4755 (void *)&strseq, 4756 SCTP_SO_LOCKED); 4757 stcb->asoc.control_pdapi = NULL; 4758 } 4759 } 4760 /* Add an end to wake them */ 4761 sq->end_added = 1; 4762 } 4763 } 4764 SCTP_INP_READ_UNLOCK(inp); 4765 if (stcb->block_entry) { 4766 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4767 stcb->block_entry->error = ECONNRESET; 4768 stcb->block_entry = NULL; 4769 } 4770 } 4771 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4772 /* 4773 * Someone holds a reference OR the socket is unaccepted 4774 * yet. 4775 */ 4776 if ((stcb->asoc.refcnt) || 4777 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4778 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4779 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4780 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4781 } 4782 SCTP_TCB_UNLOCK(stcb); 4783 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4784 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4785 /* nothing around */ 4786 so = NULL; 4787 if (so) { 4788 /* Wake any reader/writers */ 4789 sctp_sorwakeup(inp, so); 4790 sctp_sowwakeup(inp, so); 4791 } 4792 #ifdef SCTP_LOG_CLOSING 4793 sctp_log_closing(inp, stcb, 9); 4794 #endif 4795 /* no asoc destroyed */ 4796 return (0); 4797 } 4798 #ifdef SCTP_LOG_CLOSING 4799 sctp_log_closing(inp, stcb, 10); 4800 #endif 4801 /* 4802 * When I reach here, no others want to kill the assoc yet.. and I 4803 * own the lock. Now its possible an abort comes in when I do the 4804 * lock exchange below to grab all the locks to do the final take 4805 * out. to prevent this we increment the count, which will start a 4806 * timer and blow out above thus assuring us that we hold exclusive 4807 * killing of the asoc. Note that after getting back the TCB lock we 4808 * will go ahead and increment the counter back up and stop any 4809 * timer a passing stranger may have started :-S 4810 */ 4811 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4812 atomic_add_int(&stcb->asoc.refcnt, 1); 4813 4814 SCTP_TCB_UNLOCK(stcb); 4815 SCTP_INP_INFO_WLOCK(); 4816 SCTP_INP_WLOCK(inp); 4817 SCTP_TCB_LOCK(stcb); 4818 } 4819 /* Double check the GONE flag */ 4820 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4821 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4822 /* nothing around */ 4823 so = NULL; 4824 4825 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4826 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4827 /* 4828 * For TCP type we need special handling when we are 4829 * connected. We also include the peel'ed off ones to. 4830 */ 4831 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4832 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4833 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4834 if (so) { 4835 SOCK_LOCK(so); 4836 if (so->so_rcv.sb_cc == 0) { 4837 so->so_state &= ~(SS_ISCONNECTING | 4838 SS_ISDISCONNECTING | 4839 SS_ISCONFIRMING | 4840 SS_ISCONNECTED); 4841 } 4842 socantrcvmore_locked(so); 4843 sctp_sowwakeup(inp, so); 4844 sctp_sorwakeup(inp, so); 4845 SCTP_SOWAKEUP(so); 4846 } 4847 } 4848 } 4849 /* 4850 * Make it invalid too, that way if its about to run it will abort 4851 * and return. 4852 */ 4853 /* re-increment the lock */ 4854 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4855 atomic_add_int(&stcb->asoc.refcnt, -1); 4856 } 4857 if (stcb->asoc.refcnt) { 4858 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4859 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4860 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4861 SCTP_INP_INFO_WUNLOCK(); 4862 SCTP_INP_WUNLOCK(inp); 4863 } 4864 SCTP_TCB_UNLOCK(stcb); 4865 return (0); 4866 } 4867 asoc->state = 0; 4868 if (inp->sctp_tcbhash) { 4869 LIST_REMOVE(stcb, sctp_tcbhash); 4870 } 4871 if (stcb->asoc.in_asocid_hash) { 4872 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4873 } 4874 /* Now lets remove it from the list of ALL associations in the EP */ 4875 LIST_REMOVE(stcb, sctp_tcblist); 4876 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4877 SCTP_INP_INCR_REF(inp); 4878 SCTP_INP_WUNLOCK(inp); 4879 } 4880 /* pull from vtag hash */ 4881 LIST_REMOVE(stcb, sctp_asocs); 4882 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4883 inp->sctp_lport, stcb->rport); 4884 4885 /* 4886 * Now restop the timers to be sure this is paranoia at is finest! 4887 */ 4888 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4889 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4890 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4891 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4892 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4893 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4894 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4895 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4896 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4897 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4898 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4899 } 4900 4901 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4902 /* 4903 * The chunk lists and such SHOULD be empty but we check them just 4904 * in case. 4905 */ 4906 /* anything on the wheel needs to be removed */ 4907 for (i = 0; i < asoc->streamoutcnt; i++) { 4908 struct sctp_stream_out *outs; 4909 4910 outs = &asoc->strmout[i]; 4911 /* now clean up any chunks here */ 4912 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4913 TAILQ_REMOVE(&outs->outqueue, sp, next); 4914 sctp_free_spbufspace(stcb, asoc, sp); 4915 if (sp->data) { 4916 if (so) { 4917 /* Still an open socket - report */ 4918 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4919 0, (void *)sp, SCTP_SO_LOCKED); 4920 } 4921 if (sp->data) { 4922 sctp_m_freem(sp->data); 4923 sp->data = NULL; 4924 sp->tail_mbuf = NULL; 4925 sp->length = 0; 4926 } 4927 } 4928 if (sp->net) { 4929 sctp_free_remote_addr(sp->net); 4930 sp->net = NULL; 4931 } 4932 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4933 } 4934 } 4935 /* sa_ignore FREED_MEMORY */ 4936 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4937 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4938 SCTP_FREE(strrst, SCTP_M_STRESET); 4939 } 4940 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4941 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4942 if (sq->data) { 4943 sctp_m_freem(sq->data); 4944 sq->data = NULL; 4945 } 4946 sctp_free_remote_addr(sq->whoFrom); 4947 sq->whoFrom = NULL; 4948 sq->stcb = NULL; 4949 /* Free the ctl entry */ 4950 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4951 SCTP_DECR_READQ_COUNT(); 4952 /* sa_ignore FREED_MEMORY */ 4953 } 4954 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4955 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4956 if (chk->data) { 4957 sctp_m_freem(chk->data); 4958 chk->data = NULL; 4959 } 4960 if (chk->holds_key_ref) 4961 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4962 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4963 SCTP_DECR_CHK_COUNT(); 4964 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4965 asoc->free_chunk_cnt--; 4966 /* sa_ignore FREED_MEMORY */ 4967 } 4968 /* pending send queue SHOULD be empty */ 4969 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4970 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4971 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4972 #ifdef INVARIANTS 4973 } else { 4974 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4975 #endif 4976 } 4977 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4978 if (chk->data) { 4979 if (so) { 4980 /* Still a socket? */ 4981 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4982 0, chk, SCTP_SO_LOCKED); 4983 } 4984 if (chk->data) { 4985 sctp_m_freem(chk->data); 4986 chk->data = NULL; 4987 } 4988 } 4989 if (chk->holds_key_ref) 4990 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4991 if (chk->whoTo) { 4992 sctp_free_remote_addr(chk->whoTo); 4993 chk->whoTo = NULL; 4994 } 4995 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4996 SCTP_DECR_CHK_COUNT(); 4997 /* sa_ignore FREED_MEMORY */ 4998 } 4999 /* sent queue SHOULD be empty */ 5000 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5001 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5002 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5003 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5004 #ifdef INVARIANTS 5005 } else { 5006 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5007 #endif 5008 } 5009 } 5010 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5011 if (chk->data) { 5012 if (so) { 5013 /* Still a socket? */ 5014 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5015 0, chk, SCTP_SO_LOCKED); 5016 } 5017 if (chk->data) { 5018 sctp_m_freem(chk->data); 5019 chk->data = NULL; 5020 } 5021 } 5022 if (chk->holds_key_ref) 5023 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5024 sctp_free_remote_addr(chk->whoTo); 5025 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5026 SCTP_DECR_CHK_COUNT(); 5027 /* sa_ignore FREED_MEMORY */ 5028 } 5029 #ifdef INVARIANTS 5030 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5031 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5032 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5033 } 5034 } 5035 #endif 5036 /* control queue MAY not be empty */ 5037 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5038 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5039 if (chk->data) { 5040 sctp_m_freem(chk->data); 5041 chk->data = NULL; 5042 } 5043 if (chk->holds_key_ref) 5044 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5045 sctp_free_remote_addr(chk->whoTo); 5046 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5047 SCTP_DECR_CHK_COUNT(); 5048 /* sa_ignore FREED_MEMORY */ 5049 } 5050 /* ASCONF queue MAY not be empty */ 5051 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5052 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5053 if (chk->data) { 5054 sctp_m_freem(chk->data); 5055 chk->data = NULL; 5056 } 5057 if (chk->holds_key_ref) 5058 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5059 sctp_free_remote_addr(chk->whoTo); 5060 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5061 SCTP_DECR_CHK_COUNT(); 5062 /* sa_ignore FREED_MEMORY */ 5063 } 5064 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5065 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5066 if (chk->data) { 5067 sctp_m_freem(chk->data); 5068 chk->data = NULL; 5069 } 5070 if (chk->holds_key_ref) 5071 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5072 sctp_free_remote_addr(chk->whoTo); 5073 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5074 SCTP_DECR_CHK_COUNT(); 5075 /* sa_ignore FREED_MEMORY */ 5076 } 5077 5078 if (asoc->mapping_array) { 5079 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5080 asoc->mapping_array = NULL; 5081 } 5082 if (asoc->nr_mapping_array) { 5083 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5084 asoc->nr_mapping_array = NULL; 5085 } 5086 /* the stream outs */ 5087 if (asoc->strmout) { 5088 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5089 asoc->strmout = NULL; 5090 } 5091 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5092 if (asoc->strmin) { 5093 struct sctp_queued_to_read *ctl, *nctl; 5094 5095 for (i = 0; i < asoc->streamincnt; i++) { 5096 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5097 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5098 sctp_free_remote_addr(ctl->whoFrom); 5099 if (ctl->data) { 5100 sctp_m_freem(ctl->data); 5101 ctl->data = NULL; 5102 } 5103 /* 5104 * We don't free the address here since all 5105 * the net's were freed above. 5106 */ 5107 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5108 SCTP_DECR_READQ_COUNT(); 5109 } 5110 } 5111 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5112 asoc->strmin = NULL; 5113 } 5114 asoc->streamincnt = 0; 5115 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5116 #ifdef INVARIANTS 5117 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5118 panic("no net's left alloc'ed, or list points to itself"); 5119 } 5120 #endif 5121 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5122 sctp_free_remote_addr(net); 5123 } 5124 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5125 /* sa_ignore FREED_MEMORY */ 5126 sctp_remove_laddr(laddr); 5127 } 5128 5129 /* pending asconf (address) parameters */ 5130 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5131 /* sa_ignore FREED_MEMORY */ 5132 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5133 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5134 } 5135 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5136 /* sa_ignore FREED_MEMORY */ 5137 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5138 if (aack->data != NULL) { 5139 sctp_m_freem(aack->data); 5140 } 5141 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5142 } 5143 /* clean up auth stuff */ 5144 if (asoc->local_hmacs) 5145 sctp_free_hmaclist(asoc->local_hmacs); 5146 if (asoc->peer_hmacs) 5147 sctp_free_hmaclist(asoc->peer_hmacs); 5148 5149 if (asoc->local_auth_chunks) 5150 sctp_free_chunklist(asoc->local_auth_chunks); 5151 if (asoc->peer_auth_chunks) 5152 sctp_free_chunklist(asoc->peer_auth_chunks); 5153 5154 sctp_free_authinfo(&asoc->authinfo); 5155 5156 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5157 LIST_REMOVE(shared_key, next); 5158 sctp_free_sharedkey(shared_key); 5159 /* sa_ignore FREED_MEMORY */ 5160 } 5161 5162 /* Insert new items here :> */ 5163 5164 /* Get rid of LOCK */ 5165 SCTP_TCB_UNLOCK(stcb); 5166 SCTP_TCB_LOCK_DESTROY(stcb); 5167 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5168 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5169 SCTP_INP_INFO_WUNLOCK(); 5170 SCTP_INP_RLOCK(inp); 5171 } 5172 #ifdef SCTP_TRACK_FREED_ASOCS 5173 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5174 /* now clean up the tasoc itself */ 5175 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5176 SCTP_DECR_ASOC_COUNT(); 5177 } else { 5178 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5179 } 5180 #else 5181 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5182 SCTP_DECR_ASOC_COUNT(); 5183 #endif 5184 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5185 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5186 /* 5187 * If its NOT the inp_free calling us AND sctp_close 5188 * as been called, we call back... 5189 */ 5190 SCTP_INP_RUNLOCK(inp); 5191 /* 5192 * This will start the kill timer (if we are the 5193 * last one) since we hold an increment yet. But 5194 * this is the only safe way to do this since 5195 * otherwise if the socket closes at the same time 5196 * we are here we might collide in the cleanup. 5197 */ 5198 sctp_inpcb_free(inp, 5199 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5200 SCTP_CALLED_DIRECTLY_NOCMPSET); 5201 SCTP_INP_DECR_REF(inp); 5202 goto out_of; 5203 } else { 5204 /* The socket is still open. */ 5205 SCTP_INP_DECR_REF(inp); 5206 } 5207 } 5208 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5209 SCTP_INP_RUNLOCK(inp); 5210 } 5211 out_of: 5212 /* destroyed the asoc */ 5213 #ifdef SCTP_LOG_CLOSING 5214 sctp_log_closing(inp, NULL, 11); 5215 #endif 5216 return (1); 5217 } 5218 5219 5220 5221 /* 5222 * determine if a destination is "reachable" based upon the addresses bound 5223 * to the current endpoint (e.g. only v4 or v6 currently bound) 5224 */ 5225 /* 5226 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5227 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5228 * types bound as its endpoint 5229 */ 5230 int 5231 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5232 { 5233 struct sctp_inpcb *inp; 5234 int answer; 5235 5236 /* 5237 * No locks here, the TCB, in all cases is already locked and an 5238 * assoc is up. There is either a INP lock by the caller applied (in 5239 * asconf case when deleting an address) or NOT in the HB case, 5240 * however if HB then the INP increment is up and the INP will not 5241 * be removed (on top of the fact that we have a TCB lock). So we 5242 * only want to read the sctp_flags, which is either bound-all or 5243 * not.. no protection needed since once an assoc is up you can't be 5244 * changing your binding. 5245 */ 5246 inp = stcb->sctp_ep; 5247 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5248 /* if bound all, destination is not restricted */ 5249 /* 5250 * RRS: Question during lock work: Is this correct? If you 5251 * are bound-all you still might need to obey the V4--V6 5252 * flags??? IMO this bound-all stuff needs to be removed! 5253 */ 5254 return (1); 5255 } 5256 /* NOTE: all "scope" checks are done when local addresses are added */ 5257 switch (destaddr->sa_family) { 5258 #ifdef INET6 5259 case AF_INET6: 5260 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5261 break; 5262 #endif 5263 #ifdef INET 5264 case AF_INET: 5265 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5266 break; 5267 #endif 5268 default: 5269 /* invalid family, so it's unreachable */ 5270 answer = 0; 5271 break; 5272 } 5273 return (answer); 5274 } 5275 5276 /* 5277 * update the inp_vflags on an endpoint 5278 */ 5279 static void 5280 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5281 { 5282 struct sctp_laddr *laddr; 5283 5284 /* first clear the flag */ 5285 inp->ip_inp.inp.inp_vflag = 0; 5286 /* set the flag based on addresses on the ep list */ 5287 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5288 if (laddr->ifa == NULL) { 5289 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5290 __func__); 5291 continue; 5292 } 5293 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5294 continue; 5295 } 5296 switch (laddr->ifa->address.sa.sa_family) { 5297 #ifdef INET6 5298 case AF_INET6: 5299 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5300 break; 5301 #endif 5302 #ifdef INET 5303 case AF_INET: 5304 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5305 break; 5306 #endif 5307 default: 5308 break; 5309 } 5310 } 5311 } 5312 5313 /* 5314 * Add the address to the endpoint local address list There is nothing to be 5315 * done if we are bound to all addresses 5316 */ 5317 void 5318 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5319 { 5320 struct sctp_laddr *laddr; 5321 int fnd, error = 0; 5322 5323 fnd = 0; 5324 5325 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5326 /* You are already bound to all. You have it already */ 5327 return; 5328 } 5329 #ifdef INET6 5330 if (ifa->address.sa.sa_family == AF_INET6) { 5331 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5332 /* Can't bind a non-useable addr. */ 5333 return; 5334 } 5335 } 5336 #endif 5337 /* first, is it already present? */ 5338 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5339 if (laddr->ifa == ifa) { 5340 fnd = 1; 5341 break; 5342 } 5343 } 5344 5345 if (fnd == 0) { 5346 /* Not in the ep list */ 5347 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5348 if (error != 0) 5349 return; 5350 inp->laddr_count++; 5351 /* update inp_vflag flags */ 5352 switch (ifa->address.sa.sa_family) { 5353 #ifdef INET6 5354 case AF_INET6: 5355 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5356 break; 5357 #endif 5358 #ifdef INET 5359 case AF_INET: 5360 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5361 break; 5362 #endif 5363 default: 5364 break; 5365 } 5366 } 5367 return; 5368 } 5369 5370 5371 /* 5372 * select a new (hopefully reachable) destination net (should only be used 5373 * when we deleted an ep addr that is the only usable source address to reach 5374 * the destination net) 5375 */ 5376 static void 5377 sctp_select_primary_destination(struct sctp_tcb *stcb) 5378 { 5379 struct sctp_nets *net; 5380 5381 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5382 /* for now, we'll just pick the first reachable one we find */ 5383 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5384 continue; 5385 if (sctp_destination_is_reachable(stcb, 5386 (struct sockaddr *)&net->ro._l_addr)) { 5387 /* found a reachable destination */ 5388 stcb->asoc.primary_destination = net; 5389 } 5390 } 5391 /* I can't there from here! ...we're gonna die shortly... */ 5392 } 5393 5394 5395 /* 5396 * Delete the address from the endpoint local address list There is nothing 5397 * to be done if we are bound to all addresses 5398 */ 5399 void 5400 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5401 { 5402 struct sctp_laddr *laddr; 5403 int fnd; 5404 5405 fnd = 0; 5406 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5407 /* You are already bound to all. You have it already */ 5408 return; 5409 } 5410 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5411 if (laddr->ifa == ifa) { 5412 fnd = 1; 5413 break; 5414 } 5415 } 5416 if (fnd && (inp->laddr_count < 2)) { 5417 /* can't delete unless there are at LEAST 2 addresses */ 5418 return; 5419 } 5420 if (fnd) { 5421 /* 5422 * clean up any use of this address go through our 5423 * associations and clear any last_used_address that match 5424 * this one for each assoc, see if a new primary_destination 5425 * is needed 5426 */ 5427 struct sctp_tcb *stcb; 5428 5429 /* clean up "next_addr_touse" */ 5430 if (inp->next_addr_touse == laddr) 5431 /* delete this address */ 5432 inp->next_addr_touse = NULL; 5433 5434 /* clean up "last_used_address" */ 5435 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5436 struct sctp_nets *net; 5437 5438 SCTP_TCB_LOCK(stcb); 5439 if (stcb->asoc.last_used_address == laddr) 5440 /* delete this address */ 5441 stcb->asoc.last_used_address = NULL; 5442 /* 5443 * Now spin through all the nets and purge any ref 5444 * to laddr 5445 */ 5446 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5447 if (net->ro._s_addr && 5448 (net->ro._s_addr->ifa == laddr->ifa)) { 5449 /* Yep, purge src address selected */ 5450 sctp_rtentry_t *rt; 5451 5452 /* delete this address if cached */ 5453 rt = net->ro.ro_rt; 5454 if (rt != NULL) { 5455 RTFREE(rt); 5456 net->ro.ro_rt = NULL; 5457 } 5458 sctp_free_ifa(net->ro._s_addr); 5459 net->ro._s_addr = NULL; 5460 net->src_addr_selected = 0; 5461 } 5462 } 5463 SCTP_TCB_UNLOCK(stcb); 5464 } /* for each tcb */ 5465 /* remove it from the ep list */ 5466 sctp_remove_laddr(laddr); 5467 inp->laddr_count--; 5468 /* update inp_vflag flags */ 5469 sctp_update_ep_vflag(inp); 5470 } 5471 return; 5472 } 5473 5474 /* 5475 * Add the address to the TCB local address restricted list. 5476 * This is a "pending" address list (eg. addresses waiting for an 5477 * ASCONF-ACK response) and cannot be used as a valid source address. 5478 */ 5479 void 5480 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5481 { 5482 struct sctp_laddr *laddr; 5483 struct sctpladdr *list; 5484 5485 /* 5486 * Assumes TCB is locked.. and possibly the INP. May need to 5487 * confirm/fix that if we need it and is not the case. 5488 */ 5489 list = &stcb->asoc.sctp_restricted_addrs; 5490 5491 #ifdef INET6 5492 if (ifa->address.sa.sa_family == AF_INET6) { 5493 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5494 /* Can't bind a non-existent addr. */ 5495 return; 5496 } 5497 } 5498 #endif 5499 /* does the address already exist? */ 5500 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5501 if (laddr->ifa == ifa) { 5502 return; 5503 } 5504 } 5505 5506 /* add to the list */ 5507 (void)sctp_insert_laddr(list, ifa, 0); 5508 return; 5509 } 5510 5511 /* 5512 * insert an laddr entry with the given ifa for the desired list 5513 */ 5514 int 5515 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5516 { 5517 struct sctp_laddr *laddr; 5518 5519 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5520 if (laddr == NULL) { 5521 /* out of memory? */ 5522 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5523 return (EINVAL); 5524 } 5525 SCTP_INCR_LADDR_COUNT(); 5526 bzero(laddr, sizeof(*laddr)); 5527 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5528 laddr->ifa = ifa; 5529 laddr->action = act; 5530 atomic_add_int(&ifa->refcount, 1); 5531 /* insert it */ 5532 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5533 5534 return (0); 5535 } 5536 5537 /* 5538 * Remove an laddr entry from the local address list (on an assoc) 5539 */ 5540 void 5541 sctp_remove_laddr(struct sctp_laddr *laddr) 5542 { 5543 5544 /* remove from the list */ 5545 LIST_REMOVE(laddr, sctp_nxt_addr); 5546 sctp_free_ifa(laddr->ifa); 5547 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5548 SCTP_DECR_LADDR_COUNT(); 5549 } 5550 5551 /* 5552 * Remove a local address from the TCB local address restricted list 5553 */ 5554 void 5555 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5556 { 5557 struct sctp_inpcb *inp; 5558 struct sctp_laddr *laddr; 5559 5560 /* 5561 * This is called by asconf work. It is assumed that a) The TCB is 5562 * locked and b) The INP is locked. This is true in as much as I can 5563 * trace through the entry asconf code where I did these locks. 5564 * Again, the ASCONF code is a bit different in that it does lock 5565 * the INP during its work often times. This must be since we don't 5566 * want other proc's looking up things while what they are looking 5567 * up is changing :-D 5568 */ 5569 5570 inp = stcb->sctp_ep; 5571 /* if subset bound and don't allow ASCONF's, can't delete last */ 5572 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5573 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5574 if (stcb->sctp_ep->laddr_count < 2) { 5575 /* can't delete last address */ 5576 return; 5577 } 5578 } 5579 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5580 /* remove the address if it exists */ 5581 if (laddr->ifa == NULL) 5582 continue; 5583 if (laddr->ifa == ifa) { 5584 sctp_remove_laddr(laddr); 5585 return; 5586 } 5587 } 5588 5589 /* address not found! */ 5590 return; 5591 } 5592 5593 /* 5594 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5595 */ 5596 /* sysctl */ 5597 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5598 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5599 5600 5601 5602 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5603 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5604 int *sctp_cpuarry = NULL; 5605 void 5606 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5607 { 5608 /* Queue a packet to a processor for the specified core */ 5609 struct sctp_mcore_queue *qent; 5610 struct sctp_mcore_ctrl *wkq; 5611 int need_wake = 0; 5612 5613 if (sctp_mcore_workers == NULL) { 5614 /* Something went way bad during setup */ 5615 sctp_input_with_port(m, off, 0); 5616 return; 5617 } 5618 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5619 (sizeof(struct sctp_mcore_queue)), 5620 SCTP_M_MCORE); 5621 if (qent == NULL) { 5622 /* This is trouble */ 5623 sctp_input_with_port(m, off, 0); 5624 return; 5625 } 5626 qent->vn = curvnet; 5627 qent->m = m; 5628 qent->off = off; 5629 qent->v6 = 0; 5630 wkq = &sctp_mcore_workers[cpu_to_use]; 5631 SCTP_MCORE_QLOCK(wkq); 5632 5633 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5634 if (wkq->running == 0) { 5635 need_wake = 1; 5636 } 5637 SCTP_MCORE_QUNLOCK(wkq); 5638 if (need_wake) { 5639 wakeup(&wkq->running); 5640 } 5641 } 5642 5643 static void 5644 sctp_mcore_thread(void *arg) 5645 { 5646 5647 struct sctp_mcore_ctrl *wkq; 5648 struct sctp_mcore_queue *qent; 5649 5650 wkq = (struct sctp_mcore_ctrl *)arg; 5651 struct mbuf *m; 5652 int off, v6; 5653 5654 /* Wait for first tickle */ 5655 SCTP_MCORE_LOCK(wkq); 5656 wkq->running = 0; 5657 msleep(&wkq->running, 5658 &wkq->core_mtx, 5659 0, "wait for pkt", 0); 5660 SCTP_MCORE_UNLOCK(wkq); 5661 5662 /* Bind to our cpu */ 5663 thread_lock(curthread); 5664 sched_bind(curthread, wkq->cpuid); 5665 thread_unlock(curthread); 5666 5667 /* Now lets start working */ 5668 SCTP_MCORE_LOCK(wkq); 5669 /* Now grab lock and go */ 5670 for (;;) { 5671 SCTP_MCORE_QLOCK(wkq); 5672 skip_sleep: 5673 wkq->running = 1; 5674 qent = TAILQ_FIRST(&wkq->que); 5675 if (qent) { 5676 TAILQ_REMOVE(&wkq->que, qent, next); 5677 SCTP_MCORE_QUNLOCK(wkq); 5678 CURVNET_SET(qent->vn); 5679 m = qent->m; 5680 off = qent->off; 5681 v6 = qent->v6; 5682 SCTP_FREE(qent, SCTP_M_MCORE); 5683 if (v6 == 0) { 5684 sctp_input_with_port(m, off, 0); 5685 } else { 5686 SCTP_PRINTF("V6 not yet supported\n"); 5687 sctp_m_freem(m); 5688 } 5689 CURVNET_RESTORE(); 5690 SCTP_MCORE_QLOCK(wkq); 5691 } 5692 wkq->running = 0; 5693 if (!TAILQ_EMPTY(&wkq->que)) { 5694 goto skip_sleep; 5695 } 5696 SCTP_MCORE_QUNLOCK(wkq); 5697 msleep(&wkq->running, 5698 &wkq->core_mtx, 5699 0, "wait for pkt", 0); 5700 } 5701 } 5702 5703 static void 5704 sctp_startup_mcore_threads(void) 5705 { 5706 int i, cpu; 5707 5708 if (mp_ncpus == 1) 5709 return; 5710 5711 if (sctp_mcore_workers != NULL) { 5712 /* 5713 * Already been here in some previous vnet? 5714 */ 5715 return; 5716 } 5717 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5718 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5719 SCTP_M_MCORE); 5720 if (sctp_mcore_workers == NULL) { 5721 /* TSNH I hope */ 5722 return; 5723 } 5724 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5725 sizeof(struct sctp_mcore_ctrl))); 5726 /* Init the structures */ 5727 for (i = 0; i <= mp_maxid; i++) { 5728 TAILQ_INIT(&sctp_mcore_workers[i].que); 5729 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5730 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5731 sctp_mcore_workers[i].cpuid = i; 5732 } 5733 if (sctp_cpuarry == NULL) { 5734 SCTP_MALLOC(sctp_cpuarry, int *, 5735 (mp_ncpus * sizeof(int)), 5736 SCTP_M_MCORE); 5737 i = 0; 5738 CPU_FOREACH(cpu) { 5739 sctp_cpuarry[i] = cpu; 5740 i++; 5741 } 5742 } 5743 /* Now start them all */ 5744 CPU_FOREACH(cpu) { 5745 (void)kproc_create(sctp_mcore_thread, 5746 (void *)&sctp_mcore_workers[cpu], 5747 &sctp_mcore_workers[cpu].thread_proc, 5748 RFPROC, 5749 SCTP_KTHREAD_PAGES, 5750 SCTP_MCORE_NAME); 5751 5752 } 5753 } 5754 5755 #endif 5756 5757 void 5758 sctp_pcb_init() 5759 { 5760 /* 5761 * SCTP initialization for the PCB structures should be called by 5762 * the sctp_init() funciton. 5763 */ 5764 int i; 5765 struct timeval tv; 5766 5767 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5768 /* error I was called twice */ 5769 return; 5770 } 5771 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5772 5773 #if defined(SCTP_LOCAL_TRACE_BUF) 5774 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5775 #endif 5776 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5777 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5778 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5779 SCTP_M_MCORE); 5780 #endif 5781 (void)SCTP_GETTIME_TIMEVAL(&tv); 5782 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5783 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5784 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5785 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5786 #else 5787 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5788 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5789 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5790 #endif 5791 /* init the empty list of (All) Endpoints */ 5792 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5793 5794 5795 /* init the hash table of endpoints */ 5796 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5797 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5798 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5799 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5800 &SCTP_BASE_INFO(hashasocmark)); 5801 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5802 &SCTP_BASE_INFO(hashmark)); 5803 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5804 &SCTP_BASE_INFO(hashtcpmark)); 5805 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5806 5807 5808 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5809 &SCTP_BASE_INFO(hashvrfmark)); 5810 5811 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5812 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5813 /* init the zones */ 5814 /* 5815 * FIX ME: Should check for NULL returns, but if it does fail we are 5816 * doomed to panic anyways... add later maybe. 5817 */ 5818 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5819 sizeof(struct sctp_inpcb), maxsockets); 5820 5821 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5822 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5823 5824 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5825 sizeof(struct sctp_laddr), 5826 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5827 5828 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5829 sizeof(struct sctp_nets), 5830 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5831 5832 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5833 sizeof(struct sctp_tmit_chunk), 5834 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5835 5836 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5837 sizeof(struct sctp_queued_to_read), 5838 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5839 5840 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5841 sizeof(struct sctp_stream_queue_pending), 5842 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5843 5844 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5845 sizeof(struct sctp_asconf), 5846 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5847 5848 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5849 sizeof(struct sctp_asconf_ack), 5850 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5851 5852 5853 /* Master Lock INIT for info structure */ 5854 SCTP_INP_INFO_LOCK_INIT(); 5855 SCTP_STATLOG_INIT_LOCK(); 5856 5857 SCTP_IPI_COUNT_INIT(); 5858 SCTP_IPI_ADDR_INIT(); 5859 #ifdef SCTP_PACKET_LOGGING 5860 SCTP_IP_PKTLOG_INIT(); 5861 #endif 5862 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5863 5864 SCTP_WQ_ADDR_INIT(); 5865 /* not sure if we need all the counts */ 5866 SCTP_BASE_INFO(ipi_count_ep) = 0; 5867 /* assoc/tcb zone info */ 5868 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5869 /* local addrlist zone info */ 5870 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5871 /* remote addrlist zone info */ 5872 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5873 /* chunk info */ 5874 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5875 5876 /* socket queue zone info */ 5877 SCTP_BASE_INFO(ipi_count_readq) = 0; 5878 5879 /* stream out queue cont */ 5880 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5881 5882 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5883 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5884 5885 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5886 5887 /* Init the TIMEWAIT list */ 5888 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5889 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5890 } 5891 sctp_startup_iterator(); 5892 5893 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5894 sctp_startup_mcore_threads(); 5895 #endif 5896 5897 /* 5898 * INIT the default VRF which for BSD is the only one, other O/S's 5899 * may have more. But initially they must start with one and then 5900 * add the VRF's as addresses are added. 5901 */ 5902 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5903 } 5904 5905 /* 5906 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5907 */ 5908 void 5909 sctp_pcb_finish(void) 5910 { 5911 struct sctp_vrflist *vrf_bucket; 5912 struct sctp_vrf *vrf, *nvrf; 5913 struct sctp_ifn *ifn, *nifn; 5914 struct sctp_ifa *ifa, *nifa; 5915 struct sctpvtaghead *chain; 5916 struct sctp_tagblock *twait_block, *prev_twait_block; 5917 struct sctp_laddr *wi, *nwi; 5918 int i; 5919 struct sctp_iterator *it, *nit; 5920 5921 /* 5922 * In FreeBSD the iterator thread never exits but we do clean up. 5923 * The only way FreeBSD reaches here is if we have VRF's but we 5924 * still add the ifdef to make it compile on old versions. 5925 */ 5926 SCTP_IPI_ITERATOR_WQ_LOCK(); 5927 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5928 if (it->vn != curvnet) { 5929 continue; 5930 } 5931 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5932 if (it->function_atend != NULL) { 5933 (*it->function_atend) (it->pointer, it->val); 5934 } 5935 SCTP_FREE(it, SCTP_M_ITER); 5936 } 5937 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5938 SCTP_ITERATOR_LOCK(); 5939 if ((sctp_it_ctl.cur_it) && 5940 (sctp_it_ctl.cur_it->vn == curvnet)) { 5941 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5942 } 5943 SCTP_ITERATOR_UNLOCK(); 5944 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5945 SCTP_WQ_ADDR_LOCK(); 5946 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5947 LIST_REMOVE(wi, sctp_nxt_addr); 5948 SCTP_DECR_LADDR_COUNT(); 5949 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5950 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5951 } 5952 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5953 } 5954 SCTP_WQ_ADDR_UNLOCK(); 5955 5956 /* 5957 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5958 * destroyed first). 5959 */ 5960 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5961 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5962 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5963 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5964 /* free the ifa */ 5965 LIST_REMOVE(ifa, next_bucket); 5966 LIST_REMOVE(ifa, next_ifa); 5967 SCTP_FREE(ifa, SCTP_M_IFA); 5968 } 5969 /* free the ifn */ 5970 LIST_REMOVE(ifn, next_bucket); 5971 LIST_REMOVE(ifn, next_ifn); 5972 SCTP_FREE(ifn, SCTP_M_IFN); 5973 } 5974 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5975 /* free the vrf */ 5976 LIST_REMOVE(vrf, next_vrf); 5977 SCTP_FREE(vrf, SCTP_M_VRF); 5978 } 5979 /* free the vrf hashes */ 5980 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5981 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5982 5983 /* 5984 * free the TIMEWAIT list elements malloc'd in the function 5985 * sctp_add_vtag_to_timewait()... 5986 */ 5987 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5988 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5989 if (!LIST_EMPTY(chain)) { 5990 prev_twait_block = NULL; 5991 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5992 if (prev_twait_block) { 5993 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5994 } 5995 prev_twait_block = twait_block; 5996 } 5997 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5998 } 5999 } 6000 6001 /* free the locks and mutexes */ 6002 #ifdef SCTP_PACKET_LOGGING 6003 SCTP_IP_PKTLOG_DESTROY(); 6004 #endif 6005 SCTP_IPI_ADDR_DESTROY(); 6006 SCTP_STATLOG_DESTROY(); 6007 SCTP_INP_INFO_LOCK_DESTROY(); 6008 6009 SCTP_WQ_ADDR_DESTROY(); 6010 6011 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6012 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6013 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6014 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6015 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6016 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6017 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6018 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6019 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6020 /* Get rid of other stuff to */ 6021 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6022 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6023 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6024 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6025 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6026 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6027 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6028 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6029 #endif 6030 } 6031 6032 6033 int 6034 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6035 int offset, int limit, 6036 struct sockaddr *src, struct sockaddr *dst, 6037 struct sockaddr *altsa) 6038 { 6039 /* 6040 * grub through the INIT pulling addresses and loading them to the 6041 * nets structure in the asoc. The from address in the mbuf should 6042 * also be loaded (if it is not already). This routine can be called 6043 * with either INIT or INIT-ACK's as long as the m points to the IP 6044 * packet and the offset points to the beginning of the parameters. 6045 */ 6046 struct sctp_inpcb *inp; 6047 struct sctp_nets *net, *nnet, *net_tmp; 6048 struct sctp_paramhdr *phdr, parm_buf; 6049 struct sctp_tcb *stcb_tmp; 6050 uint16_t ptype, plen; 6051 struct sockaddr *sa; 6052 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6053 struct sctp_auth_random *p_random = NULL; 6054 uint16_t random_len = 0; 6055 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6056 struct sctp_auth_hmac_algo *hmacs = NULL; 6057 uint16_t hmacs_len = 0; 6058 uint8_t saw_asconf = 0; 6059 uint8_t saw_asconf_ack = 0; 6060 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6061 struct sctp_auth_chunk_list *chunks = NULL; 6062 uint16_t num_chunks = 0; 6063 sctp_key_t *new_key; 6064 uint32_t keylen; 6065 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6066 uint8_t peer_supports_ecn; 6067 uint8_t peer_supports_prsctp; 6068 uint8_t peer_supports_auth; 6069 uint8_t peer_supports_asconf; 6070 uint8_t peer_supports_asconf_ack; 6071 uint8_t peer_supports_reconfig; 6072 uint8_t peer_supports_nrsack; 6073 uint8_t peer_supports_pktdrop; 6074 6075 #ifdef INET 6076 struct sockaddr_in sin; 6077 6078 #endif 6079 #ifdef INET6 6080 struct sockaddr_in6 sin6; 6081 6082 #endif 6083 6084 /* First get the destination address setup too. */ 6085 #ifdef INET 6086 memset(&sin, 0, sizeof(sin)); 6087 sin.sin_family = AF_INET; 6088 sin.sin_len = sizeof(sin); 6089 sin.sin_port = stcb->rport; 6090 #endif 6091 #ifdef INET6 6092 memset(&sin6, 0, sizeof(sin6)); 6093 sin6.sin6_family = AF_INET6; 6094 sin6.sin6_len = sizeof(struct sockaddr_in6); 6095 sin6.sin6_port = stcb->rport; 6096 #endif 6097 if (altsa) { 6098 sa = altsa; 6099 } else { 6100 sa = src; 6101 } 6102 peer_supports_ecn = 0; 6103 peer_supports_prsctp = 0; 6104 peer_supports_auth = 0; 6105 peer_supports_asconf = 0; 6106 peer_supports_reconfig = 0; 6107 peer_supports_nrsack = 0; 6108 peer_supports_pktdrop = 0; 6109 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6110 /* mark all addresses that we have currently on the list */ 6111 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6112 } 6113 /* does the source address already exist? if so skip it */ 6114 inp = stcb->sctp_ep; 6115 atomic_add_int(&stcb->asoc.refcnt, 1); 6116 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6117 atomic_add_int(&stcb->asoc.refcnt, -1); 6118 6119 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6120 /* we must add the source address */ 6121 /* no scope set here since we have a tcb already. */ 6122 switch (sa->sa_family) { 6123 #ifdef INET 6124 case AF_INET: 6125 if (stcb->asoc.scope.ipv4_addr_legal) { 6126 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6127 return (-1); 6128 } 6129 } 6130 break; 6131 #endif 6132 #ifdef INET6 6133 case AF_INET6: 6134 if (stcb->asoc.scope.ipv6_addr_legal) { 6135 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6136 return (-2); 6137 } 6138 } 6139 break; 6140 #endif 6141 default: 6142 break; 6143 } 6144 } else { 6145 if (net_tmp != NULL && stcb_tmp == stcb) { 6146 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6147 } else if (stcb_tmp != stcb) { 6148 /* It belongs to another association? */ 6149 if (stcb_tmp) 6150 SCTP_TCB_UNLOCK(stcb_tmp); 6151 return (-3); 6152 } 6153 } 6154 if (stcb->asoc.state == 0) { 6155 /* the assoc was freed? */ 6156 return (-4); 6157 } 6158 /* now we must go through each of the params. */ 6159 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6160 while (phdr) { 6161 ptype = ntohs(phdr->param_type); 6162 plen = ntohs(phdr->param_length); 6163 /* 6164 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6165 * (uint32_t)ptype, (int)plen); 6166 */ 6167 if (offset + plen > limit) { 6168 break; 6169 } 6170 if (plen == 0) { 6171 break; 6172 } 6173 #ifdef INET 6174 if (ptype == SCTP_IPV4_ADDRESS) { 6175 if (stcb->asoc.scope.ipv4_addr_legal) { 6176 struct sctp_ipv4addr_param *p4, p4_buf; 6177 6178 /* ok get the v4 address and check/add */ 6179 phdr = sctp_get_next_param(m, offset, 6180 (struct sctp_paramhdr *)&p4_buf, 6181 sizeof(p4_buf)); 6182 if (plen != sizeof(struct sctp_ipv4addr_param) || 6183 phdr == NULL) { 6184 return (-5); 6185 } 6186 p4 = (struct sctp_ipv4addr_param *)phdr; 6187 sin.sin_addr.s_addr = p4->addr; 6188 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6189 /* Skip multi-cast addresses */ 6190 goto next_param; 6191 } 6192 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6193 (sin.sin_addr.s_addr == INADDR_ANY)) { 6194 goto next_param; 6195 } 6196 sa = (struct sockaddr *)&sin; 6197 inp = stcb->sctp_ep; 6198 atomic_add_int(&stcb->asoc.refcnt, 1); 6199 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6200 dst, stcb); 6201 atomic_add_int(&stcb->asoc.refcnt, -1); 6202 6203 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6204 inp == NULL) { 6205 /* we must add the source address */ 6206 /* 6207 * no scope set since we have a tcb 6208 * already 6209 */ 6210 6211 /* 6212 * we must validate the state again 6213 * here 6214 */ 6215 add_it_now: 6216 if (stcb->asoc.state == 0) { 6217 /* the assoc was freed? */ 6218 return (-7); 6219 } 6220 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6221 return (-8); 6222 } 6223 } else if (stcb_tmp == stcb) { 6224 if (stcb->asoc.state == 0) { 6225 /* the assoc was freed? */ 6226 return (-10); 6227 } 6228 if (net != NULL) { 6229 /* clear flag */ 6230 net->dest_state &= 6231 ~SCTP_ADDR_NOT_IN_ASSOC; 6232 } 6233 } else { 6234 /* 6235 * strange, address is in another 6236 * assoc? straighten out locks. 6237 */ 6238 if (stcb_tmp) { 6239 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6240 struct mbuf *op_err; 6241 char msg[SCTP_DIAG_INFO_LEN]; 6242 6243 /* 6244 * in setup state we 6245 * abort this guy 6246 */ 6247 snprintf(msg, sizeof(msg), 6248 "%s:%d at %s", __FILE__, __LINE__, __func__); 6249 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6250 msg); 6251 sctp_abort_an_association(stcb_tmp->sctp_ep, 6252 stcb_tmp, op_err, 6253 SCTP_SO_NOT_LOCKED); 6254 goto add_it_now; 6255 } 6256 SCTP_TCB_UNLOCK(stcb_tmp); 6257 } 6258 if (stcb->asoc.state == 0) { 6259 /* the assoc was freed? */ 6260 return (-12); 6261 } 6262 return (-13); 6263 } 6264 } 6265 } else 6266 #endif 6267 #ifdef INET6 6268 if (ptype == SCTP_IPV6_ADDRESS) { 6269 if (stcb->asoc.scope.ipv6_addr_legal) { 6270 /* ok get the v6 address and check/add */ 6271 struct sctp_ipv6addr_param *p6, p6_buf; 6272 6273 phdr = sctp_get_next_param(m, offset, 6274 (struct sctp_paramhdr *)&p6_buf, 6275 sizeof(p6_buf)); 6276 if (plen != sizeof(struct sctp_ipv6addr_param) || 6277 phdr == NULL) { 6278 return (-14); 6279 } 6280 p6 = (struct sctp_ipv6addr_param *)phdr; 6281 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6282 sizeof(p6->addr)); 6283 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6284 /* Skip multi-cast addresses */ 6285 goto next_param; 6286 } 6287 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6288 /* 6289 * Link local make no sense without 6290 * scope 6291 */ 6292 goto next_param; 6293 } 6294 sa = (struct sockaddr *)&sin6; 6295 inp = stcb->sctp_ep; 6296 atomic_add_int(&stcb->asoc.refcnt, 1); 6297 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6298 dst, stcb); 6299 atomic_add_int(&stcb->asoc.refcnt, -1); 6300 if (stcb_tmp == NULL && 6301 (inp == stcb->sctp_ep || inp == NULL)) { 6302 /* 6303 * we must validate the state again 6304 * here 6305 */ 6306 add_it_now6: 6307 if (stcb->asoc.state == 0) { 6308 /* the assoc was freed? */ 6309 return (-16); 6310 } 6311 /* 6312 * we must add the address, no scope 6313 * set 6314 */ 6315 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6316 return (-17); 6317 } 6318 } else if (stcb_tmp == stcb) { 6319 /* 6320 * we must validate the state again 6321 * here 6322 */ 6323 if (stcb->asoc.state == 0) { 6324 /* the assoc was freed? */ 6325 return (-19); 6326 } 6327 if (net != NULL) { 6328 /* clear flag */ 6329 net->dest_state &= 6330 ~SCTP_ADDR_NOT_IN_ASSOC; 6331 } 6332 } else { 6333 /* 6334 * strange, address is in another 6335 * assoc? straighten out locks. 6336 */ 6337 if (stcb_tmp) { 6338 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6339 struct mbuf *op_err; 6340 char msg[SCTP_DIAG_INFO_LEN]; 6341 6342 /* 6343 * in setup state we 6344 * abort this guy 6345 */ 6346 snprintf(msg, sizeof(msg), 6347 "%s:%d at %s", __FILE__, __LINE__, __func__); 6348 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6349 msg); 6350 sctp_abort_an_association(stcb_tmp->sctp_ep, 6351 stcb_tmp, op_err, 6352 SCTP_SO_NOT_LOCKED); 6353 goto add_it_now6; 6354 } 6355 SCTP_TCB_UNLOCK(stcb_tmp); 6356 } 6357 if (stcb->asoc.state == 0) { 6358 /* the assoc was freed? */ 6359 return (-21); 6360 } 6361 return (-22); 6362 } 6363 } 6364 } else 6365 #endif 6366 if (ptype == SCTP_ECN_CAPABLE) { 6367 peer_supports_ecn = 1; 6368 } else if (ptype == SCTP_ULP_ADAPTATION) { 6369 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6370 struct sctp_adaptation_layer_indication ai, 6371 *aip; 6372 6373 phdr = sctp_get_next_param(m, offset, 6374 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6375 aip = (struct sctp_adaptation_layer_indication *)phdr; 6376 if (aip) { 6377 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6378 stcb->asoc.adaptation_needed = 1; 6379 } 6380 } 6381 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6382 struct sctp_asconf_addr_param lstore, *fee; 6383 int lptype; 6384 struct sockaddr *lsa = NULL; 6385 6386 #ifdef INET 6387 struct sctp_asconf_addrv4_param *fii; 6388 6389 #endif 6390 6391 if (stcb->asoc.asconf_supported == 0) { 6392 return (-100); 6393 } 6394 if (plen > sizeof(lstore)) { 6395 return (-23); 6396 } 6397 phdr = sctp_get_next_param(m, offset, 6398 (struct sctp_paramhdr *)&lstore, 6399 min(plen, sizeof(lstore))); 6400 if (phdr == NULL) { 6401 return (-24); 6402 } 6403 fee = (struct sctp_asconf_addr_param *)phdr; 6404 lptype = ntohs(fee->addrp.ph.param_type); 6405 switch (lptype) { 6406 #ifdef INET 6407 case SCTP_IPV4_ADDRESS: 6408 if (plen != 6409 sizeof(struct sctp_asconf_addrv4_param)) { 6410 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6411 (int)sizeof(struct sctp_asconf_addrv4_param), 6412 plen); 6413 } else { 6414 fii = (struct sctp_asconf_addrv4_param *)fee; 6415 sin.sin_addr.s_addr = fii->addrp.addr; 6416 lsa = (struct sockaddr *)&sin; 6417 } 6418 break; 6419 #endif 6420 #ifdef INET6 6421 case SCTP_IPV6_ADDRESS: 6422 if (plen != 6423 sizeof(struct sctp_asconf_addr_param)) { 6424 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6425 (int)sizeof(struct sctp_asconf_addr_param), 6426 plen); 6427 } else { 6428 memcpy(sin6.sin6_addr.s6_addr, 6429 fee->addrp.addr, 6430 sizeof(fee->addrp.addr)); 6431 lsa = (struct sockaddr *)&sin6; 6432 } 6433 break; 6434 #endif 6435 default: 6436 break; 6437 } 6438 if (lsa) { 6439 (void)sctp_set_primary_addr(stcb, sa, NULL); 6440 } 6441 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6442 stcb->asoc.peer_supports_nat = 1; 6443 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6444 /* Peer supports pr-sctp */ 6445 peer_supports_prsctp = 1; 6446 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6447 /* A supported extension chunk */ 6448 struct sctp_supported_chunk_types_param *pr_supported; 6449 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6450 int num_ent, i; 6451 6452 phdr = sctp_get_next_param(m, offset, 6453 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6454 if (phdr == NULL) { 6455 return (-25); 6456 } 6457 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6458 num_ent = plen - sizeof(struct sctp_paramhdr); 6459 for (i = 0; i < num_ent; i++) { 6460 switch (pr_supported->chunk_types[i]) { 6461 case SCTP_ASCONF: 6462 peer_supports_asconf = 1; 6463 break; 6464 case SCTP_ASCONF_ACK: 6465 peer_supports_asconf_ack = 1; 6466 break; 6467 case SCTP_FORWARD_CUM_TSN: 6468 peer_supports_prsctp = 1; 6469 break; 6470 case SCTP_PACKET_DROPPED: 6471 peer_supports_pktdrop = 1; 6472 break; 6473 case SCTP_NR_SELECTIVE_ACK: 6474 peer_supports_nrsack = 1; 6475 break; 6476 case SCTP_STREAM_RESET: 6477 peer_supports_reconfig = 1; 6478 break; 6479 case SCTP_AUTHENTICATION: 6480 peer_supports_auth = 1; 6481 break; 6482 default: 6483 /* one I have not learned yet */ 6484 break; 6485 6486 } 6487 } 6488 } else if (ptype == SCTP_RANDOM) { 6489 if (plen > sizeof(random_store)) 6490 break; 6491 if (got_random) { 6492 /* already processed a RANDOM */ 6493 goto next_param; 6494 } 6495 phdr = sctp_get_next_param(m, offset, 6496 (struct sctp_paramhdr *)random_store, 6497 min(sizeof(random_store), plen)); 6498 if (phdr == NULL) 6499 return (-26); 6500 p_random = (struct sctp_auth_random *)phdr; 6501 random_len = plen - sizeof(*p_random); 6502 /* enforce the random length */ 6503 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6504 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6505 return (-27); 6506 } 6507 got_random = 1; 6508 } else if (ptype == SCTP_HMAC_LIST) { 6509 uint16_t num_hmacs; 6510 uint16_t i; 6511 6512 if (plen > sizeof(hmacs_store)) 6513 break; 6514 if (got_hmacs) { 6515 /* already processed a HMAC list */ 6516 goto next_param; 6517 } 6518 phdr = sctp_get_next_param(m, offset, 6519 (struct sctp_paramhdr *)hmacs_store, 6520 min(plen, sizeof(hmacs_store))); 6521 if (phdr == NULL) 6522 return (-28); 6523 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6524 hmacs_len = plen - sizeof(*hmacs); 6525 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6526 /* validate the hmac list */ 6527 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6528 return (-29); 6529 } 6530 if (stcb->asoc.peer_hmacs != NULL) 6531 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6532 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6533 if (stcb->asoc.peer_hmacs != NULL) { 6534 for (i = 0; i < num_hmacs; i++) { 6535 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6536 ntohs(hmacs->hmac_ids[i])); 6537 } 6538 } 6539 got_hmacs = 1; 6540 } else if (ptype == SCTP_CHUNK_LIST) { 6541 int i; 6542 6543 if (plen > sizeof(chunks_store)) 6544 break; 6545 if (got_chklist) { 6546 /* already processed a Chunks list */ 6547 goto next_param; 6548 } 6549 phdr = sctp_get_next_param(m, offset, 6550 (struct sctp_paramhdr *)chunks_store, 6551 min(plen, sizeof(chunks_store))); 6552 if (phdr == NULL) 6553 return (-30); 6554 chunks = (struct sctp_auth_chunk_list *)phdr; 6555 num_chunks = plen - sizeof(*chunks); 6556 if (stcb->asoc.peer_auth_chunks != NULL) 6557 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6558 else 6559 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6560 for (i = 0; i < num_chunks; i++) { 6561 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6562 stcb->asoc.peer_auth_chunks); 6563 /* record asconf/asconf-ack if listed */ 6564 if (chunks->chunk_types[i] == SCTP_ASCONF) 6565 saw_asconf = 1; 6566 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6567 saw_asconf_ack = 1; 6568 6569 } 6570 got_chklist = 1; 6571 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6572 (ptype == SCTP_STATE_COOKIE) || 6573 (ptype == SCTP_UNRECOG_PARAM) || 6574 (ptype == SCTP_COOKIE_PRESERVE) || 6575 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6576 (ptype == SCTP_ADD_IP_ADDRESS) || 6577 (ptype == SCTP_DEL_IP_ADDRESS) || 6578 (ptype == SCTP_ERROR_CAUSE_IND) || 6579 (ptype == SCTP_SUCCESS_REPORT)) { 6580 /* don't care */ ; 6581 } else { 6582 if ((ptype & 0x8000) == 0x0000) { 6583 /* 6584 * must stop processing the rest of the 6585 * param's. Any report bits were handled 6586 * with the call to 6587 * sctp_arethere_unrecognized_parameters() 6588 * when the INIT or INIT-ACK was first seen. 6589 */ 6590 break; 6591 } 6592 } 6593 6594 next_param: 6595 offset += SCTP_SIZE32(plen); 6596 if (offset >= limit) { 6597 break; 6598 } 6599 phdr = sctp_get_next_param(m, offset, &parm_buf, 6600 sizeof(parm_buf)); 6601 } 6602 /* Now check to see if we need to purge any addresses */ 6603 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6604 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6605 SCTP_ADDR_NOT_IN_ASSOC) { 6606 /* This address has been removed from the asoc */ 6607 /* remove and free it */ 6608 stcb->asoc.numnets--; 6609 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6610 sctp_free_remote_addr(net); 6611 if (net == stcb->asoc.primary_destination) { 6612 stcb->asoc.primary_destination = NULL; 6613 sctp_select_primary_destination(stcb); 6614 } 6615 } 6616 } 6617 if ((stcb->asoc.ecn_supported == 1) && 6618 (peer_supports_ecn == 0)) { 6619 stcb->asoc.ecn_supported = 0; 6620 } 6621 if ((stcb->asoc.prsctp_supported == 1) && 6622 (peer_supports_prsctp == 0)) { 6623 stcb->asoc.prsctp_supported = 0; 6624 } 6625 if ((stcb->asoc.auth_supported == 1) && 6626 ((peer_supports_auth == 0) || 6627 (got_random == 0) || (got_hmacs == 0))) { 6628 stcb->asoc.auth_supported = 0; 6629 } 6630 if ((stcb->asoc.asconf_supported == 1) && 6631 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6632 (stcb->asoc.auth_supported == 0) || 6633 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6634 stcb->asoc.asconf_supported = 0; 6635 } 6636 if ((stcb->asoc.reconfig_supported == 1) && 6637 (peer_supports_reconfig == 0)) { 6638 stcb->asoc.reconfig_supported = 0; 6639 } 6640 if ((stcb->asoc.nrsack_supported == 1) && 6641 (peer_supports_nrsack == 0)) { 6642 stcb->asoc.nrsack_supported = 0; 6643 } 6644 if ((stcb->asoc.pktdrop_supported == 1) && 6645 (peer_supports_pktdrop == 0)) { 6646 stcb->asoc.pktdrop_supported = 0; 6647 } 6648 /* validate authentication required parameters */ 6649 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6650 /* peer does not support auth but sent a chunks list? */ 6651 return (-31); 6652 } 6653 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6654 /* peer supports asconf but not auth? */ 6655 return (-32); 6656 } else if ((peer_supports_asconf == 1) && 6657 (peer_supports_auth == 1) && 6658 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6659 return (-33); 6660 } 6661 /* concatenate the full random key */ 6662 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6663 if (chunks != NULL) { 6664 keylen += sizeof(*chunks) + num_chunks; 6665 } 6666 new_key = sctp_alloc_key(keylen); 6667 if (new_key != NULL) { 6668 /* copy in the RANDOM */ 6669 if (p_random != NULL) { 6670 keylen = sizeof(*p_random) + random_len; 6671 bcopy(p_random, new_key->key, keylen); 6672 } 6673 /* append in the AUTH chunks */ 6674 if (chunks != NULL) { 6675 bcopy(chunks, new_key->key + keylen, 6676 sizeof(*chunks) + num_chunks); 6677 keylen += sizeof(*chunks) + num_chunks; 6678 } 6679 /* append in the HMACs */ 6680 if (hmacs != NULL) { 6681 bcopy(hmacs, new_key->key + keylen, 6682 sizeof(*hmacs) + hmacs_len); 6683 } 6684 } else { 6685 /* failed to get memory for the key */ 6686 return (-34); 6687 } 6688 if (stcb->asoc.authinfo.peer_random != NULL) 6689 sctp_free_key(stcb->asoc.authinfo.peer_random); 6690 stcb->asoc.authinfo.peer_random = new_key; 6691 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6692 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6693 6694 return (0); 6695 } 6696 6697 int 6698 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6699 struct sctp_nets *net) 6700 { 6701 /* make sure the requested primary address exists in the assoc */ 6702 if (net == NULL && sa) 6703 net = sctp_findnet(stcb, sa); 6704 6705 if (net == NULL) { 6706 /* didn't find the requested primary address! */ 6707 return (-1); 6708 } else { 6709 /* set the primary address */ 6710 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6711 /* Must be confirmed, so queue to set */ 6712 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6713 return (0); 6714 } 6715 stcb->asoc.primary_destination = net; 6716 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6717 sctp_free_remote_addr(stcb->asoc.alternate); 6718 stcb->asoc.alternate = NULL; 6719 } 6720 net = TAILQ_FIRST(&stcb->asoc.nets); 6721 if (net != stcb->asoc.primary_destination) { 6722 /* 6723 * first one on the list is NOT the primary 6724 * sctp_cmpaddr() is much more efficient if the 6725 * primary is the first on the list, make it so. 6726 */ 6727 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6728 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6729 } 6730 return (0); 6731 } 6732 } 6733 6734 int 6735 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6736 { 6737 /* 6738 * This function serves two purposes. It will see if a TAG can be 6739 * re-used and return 1 for yes it is ok and 0 for don't use that 6740 * tag. A secondary function it will do is purge out old tags that 6741 * can be removed. 6742 */ 6743 struct sctpvtaghead *chain; 6744 struct sctp_tagblock *twait_block; 6745 struct sctpasochead *head; 6746 struct sctp_tcb *stcb; 6747 int i; 6748 6749 SCTP_INP_INFO_RLOCK(); 6750 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6751 SCTP_BASE_INFO(hashasocmark))]; 6752 LIST_FOREACH(stcb, head, sctp_asocs) { 6753 /* 6754 * We choose not to lock anything here. TCB's can't be 6755 * removed since we have the read lock, so they can't be 6756 * freed on us, same thing for the INP. I may be wrong with 6757 * this assumption, but we will go with it for now :-) 6758 */ 6759 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6760 continue; 6761 } 6762 if (stcb->asoc.my_vtag == tag) { 6763 /* candidate */ 6764 if (stcb->rport != rport) { 6765 continue; 6766 } 6767 if (stcb->sctp_ep->sctp_lport != lport) { 6768 continue; 6769 } 6770 /* Its a used tag set */ 6771 SCTP_INP_INFO_RUNLOCK(); 6772 return (0); 6773 } 6774 } 6775 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6776 /* Now what about timed wait ? */ 6777 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6778 /* 6779 * Block(s) are present, lets see if we have this tag in the 6780 * list 6781 */ 6782 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6783 if (twait_block->vtag_block[i].v_tag == 0) { 6784 /* not used */ 6785 continue; 6786 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6787 now->tv_sec) { 6788 /* Audit expires this guy */ 6789 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6790 twait_block->vtag_block[i].v_tag = 0; 6791 twait_block->vtag_block[i].lport = 0; 6792 twait_block->vtag_block[i].rport = 0; 6793 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6794 (twait_block->vtag_block[i].lport == lport) && 6795 (twait_block->vtag_block[i].rport == rport)) { 6796 /* Bad tag, sorry :< */ 6797 SCTP_INP_INFO_RUNLOCK(); 6798 return (0); 6799 } 6800 } 6801 } 6802 SCTP_INP_INFO_RUNLOCK(); 6803 return (1); 6804 } 6805 6806 static void 6807 sctp_drain_mbufs(struct sctp_tcb *stcb) 6808 { 6809 /* 6810 * We must hunt this association for MBUF's past the cumack (i.e. 6811 * out of order data that we can renege on). 6812 */ 6813 struct sctp_association *asoc; 6814 struct sctp_tmit_chunk *chk, *nchk; 6815 uint32_t cumulative_tsn_p1; 6816 struct sctp_queued_to_read *ctl, *nctl; 6817 int cnt, strmat; 6818 uint32_t gap, i; 6819 int fnd = 0; 6820 6821 /* We look for anything larger than the cum-ack + 1 */ 6822 6823 asoc = &stcb->asoc; 6824 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6825 /* none we can reneg on. */ 6826 return; 6827 } 6828 SCTP_STAT_INCR(sctps_protocol_drains_done); 6829 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6830 cnt = 0; 6831 /* First look in the re-assembly queue */ 6832 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6833 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6834 /* Yep it is above cum-ack */ 6835 cnt++; 6836 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6837 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6838 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6839 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6840 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6841 if (chk->data) { 6842 sctp_m_freem(chk->data); 6843 chk->data = NULL; 6844 } 6845 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6846 } 6847 } 6848 /* Ok that was fun, now we will drain all the inbound streams? */ 6849 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6850 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6851 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6852 /* Yep it is above cum-ack */ 6853 cnt++; 6854 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6855 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6856 sctp_ucount_decr(asoc->cnt_on_all_streams); 6857 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6858 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6859 if (ctl->data) { 6860 sctp_m_freem(ctl->data); 6861 ctl->data = NULL; 6862 } 6863 sctp_free_remote_addr(ctl->whoFrom); 6864 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6865 SCTP_DECR_READQ_COUNT(); 6866 } 6867 } 6868 } 6869 if (cnt) { 6870 /* We must back down to see what the new highest is */ 6871 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6872 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6873 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6874 asoc->highest_tsn_inside_map = i; 6875 fnd = 1; 6876 break; 6877 } 6878 } 6879 if (!fnd) { 6880 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6881 } 6882 /* 6883 * Question, should we go through the delivery queue? The 6884 * only reason things are on here is the app not reading OR 6885 * a p-d-api up. An attacker COULD send enough in to 6886 * initiate the PD-API and then send a bunch of stuff to 6887 * other streams... these would wind up on the delivery 6888 * queue.. and then we would not get to them. But in order 6889 * to do this I then have to back-track and un-deliver 6890 * sequence numbers in streams.. el-yucko. I think for now 6891 * we will NOT look at the delivery queue and leave it to be 6892 * something to consider later. An alternative would be to 6893 * abort the P-D-API with a notification and then deliver 6894 * the data.... Or another method might be to keep track of 6895 * how many times the situation occurs and if we see a 6896 * possible attack underway just abort the association. 6897 */ 6898 #ifdef SCTP_DEBUG 6899 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6900 #endif 6901 /* 6902 * Now do we need to find a new 6903 * asoc->highest_tsn_inside_map? 6904 */ 6905 asoc->last_revoke_count = cnt; 6906 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6907 /* sa_ignore NO_NULL_CHK */ 6908 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6909 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6910 } 6911 /* 6912 * Another issue, in un-setting the TSN's in the mapping array we 6913 * DID NOT adjust the highest_tsn marker. This will cause one of 6914 * two things to occur. It may cause us to do extra work in checking 6915 * for our mapping array movement. More importantly it may cause us 6916 * to SACK every datagram. This may not be a bad thing though since 6917 * we will recover once we get our cum-ack above and all this stuff 6918 * we dumped recovered. 6919 */ 6920 } 6921 6922 void 6923 sctp_drain() 6924 { 6925 /* 6926 * We must walk the PCB lists for ALL associations here. The system 6927 * is LOW on MBUF's and needs help. This is where reneging will 6928 * occur. We really hope this does NOT happen! 6929 */ 6930 VNET_ITERATOR_DECL(vnet_iter); 6931 VNET_LIST_RLOCK_NOSLEEP(); 6932 VNET_FOREACH(vnet_iter) { 6933 CURVNET_SET(vnet_iter); 6934 struct sctp_inpcb *inp; 6935 struct sctp_tcb *stcb; 6936 6937 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6938 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6939 #ifdef VIMAGE 6940 continue; 6941 #else 6942 return; 6943 #endif 6944 } 6945 SCTP_INP_INFO_RLOCK(); 6946 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6947 /* For each endpoint */ 6948 SCTP_INP_RLOCK(inp); 6949 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6950 /* For each association */ 6951 SCTP_TCB_LOCK(stcb); 6952 sctp_drain_mbufs(stcb); 6953 SCTP_TCB_UNLOCK(stcb); 6954 } 6955 SCTP_INP_RUNLOCK(inp); 6956 } 6957 SCTP_INP_INFO_RUNLOCK(); 6958 CURVNET_RESTORE(); 6959 } 6960 VNET_LIST_RUNLOCK_NOSLEEP(); 6961 } 6962 6963 /* 6964 * start a new iterator 6965 * iterates through all endpoints and associations based on the pcb_state 6966 * flags and asoc_state. "af" (mandatory) is executed for all matching 6967 * assocs and "ef" (optional) is executed when the iterator completes. 6968 * "inpf" (optional) is executed for each new endpoint as it is being 6969 * iterated through. inpe (optional) is called when the inp completes 6970 * its way through all the stcbs. 6971 */ 6972 int 6973 sctp_initiate_iterator(inp_func inpf, 6974 asoc_func af, 6975 inp_func inpe, 6976 uint32_t pcb_state, 6977 uint32_t pcb_features, 6978 uint32_t asoc_state, 6979 void *argp, 6980 uint32_t argi, 6981 end_func ef, 6982 struct sctp_inpcb *s_inp, 6983 uint8_t chunk_output_off) 6984 { 6985 struct sctp_iterator *it = NULL; 6986 6987 if (af == NULL) { 6988 return (-1); 6989 } 6990 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6991 SCTP_M_ITER); 6992 if (it == NULL) { 6993 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6994 return (ENOMEM); 6995 } 6996 memset(it, 0, sizeof(*it)); 6997 it->function_assoc = af; 6998 it->function_inp = inpf; 6999 if (inpf) 7000 it->done_current_ep = 0; 7001 else 7002 it->done_current_ep = 1; 7003 it->function_atend = ef; 7004 it->pointer = argp; 7005 it->val = argi; 7006 it->pcb_flags = pcb_state; 7007 it->pcb_features = pcb_features; 7008 it->asoc_state = asoc_state; 7009 it->function_inp_end = inpe; 7010 it->no_chunk_output = chunk_output_off; 7011 it->vn = curvnet; 7012 if (s_inp) { 7013 /* Assume lock is held here */ 7014 it->inp = s_inp; 7015 SCTP_INP_INCR_REF(it->inp); 7016 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7017 } else { 7018 SCTP_INP_INFO_RLOCK(); 7019 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7020 if (it->inp) { 7021 SCTP_INP_INCR_REF(it->inp); 7022 } 7023 SCTP_INP_INFO_RUNLOCK(); 7024 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7025 7026 } 7027 SCTP_IPI_ITERATOR_WQ_LOCK(); 7028 7029 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7030 if (sctp_it_ctl.iterator_running == 0) { 7031 sctp_wakeup_iterator(); 7032 } 7033 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7034 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7035 return (0); 7036 } 7037