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", __FUNCTION__); 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 if (head == NULL) { 1445 goto null_return; 1446 } 1447 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1448 if (stcb->rport != rport) { 1449 /* remote port does not match */ 1450 continue; 1451 } 1452 SCTP_TCB_LOCK(stcb); 1453 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1454 SCTP_TCB_UNLOCK(stcb); 1455 continue; 1456 } 1457 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1458 SCTP_TCB_UNLOCK(stcb); 1459 continue; 1460 } 1461 /* now look at the list of remote addresses */ 1462 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1463 #ifdef INVARIANTS 1464 if (net == (TAILQ_NEXT(net, sctp_next))) { 1465 panic("Corrupt net list"); 1466 } 1467 #endif 1468 if (net->ro._l_addr.sa.sa_family != 1469 remote->sa_family) { 1470 /* not the same family */ 1471 continue; 1472 } 1473 switch (remote->sa_family) { 1474 #ifdef INET 1475 case AF_INET: 1476 { 1477 struct sockaddr_in *sin, 1478 *rsin; 1479 1480 sin = (struct sockaddr_in *) 1481 &net->ro._l_addr; 1482 rsin = (struct sockaddr_in *)remote; 1483 if (sin->sin_addr.s_addr == 1484 rsin->sin_addr.s_addr) { 1485 /* found it */ 1486 if (netp != NULL) { 1487 *netp = net; 1488 } 1489 if (locked_tcb == NULL) { 1490 SCTP_INP_DECR_REF(inp); 1491 } else if (locked_tcb != stcb) { 1492 SCTP_TCB_LOCK(locked_tcb); 1493 } 1494 if (locked_tcb) { 1495 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1496 } 1497 SCTP_INP_WUNLOCK(inp); 1498 SCTP_INP_INFO_RUNLOCK(); 1499 return (stcb); 1500 } 1501 break; 1502 } 1503 #endif 1504 #ifdef INET6 1505 case AF_INET6: 1506 { 1507 struct sockaddr_in6 *sin6, 1508 *rsin6; 1509 1510 sin6 = (struct sockaddr_in6 *) 1511 &net->ro._l_addr; 1512 rsin6 = (struct sockaddr_in6 *)remote; 1513 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1514 rsin6)) { 1515 /* found it */ 1516 if (netp != NULL) { 1517 *netp = net; 1518 } 1519 if (locked_tcb == NULL) { 1520 SCTP_INP_DECR_REF(inp); 1521 } else if (locked_tcb != stcb) { 1522 SCTP_TCB_LOCK(locked_tcb); 1523 } 1524 if (locked_tcb) { 1525 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1526 } 1527 SCTP_INP_WUNLOCK(inp); 1528 SCTP_INP_INFO_RUNLOCK(); 1529 return (stcb); 1530 } 1531 break; 1532 } 1533 #endif 1534 default: 1535 /* TSNH */ 1536 break; 1537 } 1538 } 1539 SCTP_TCB_UNLOCK(stcb); 1540 } 1541 } 1542 null_return: 1543 /* clean up for returning null */ 1544 if (locked_tcb) { 1545 SCTP_TCB_LOCK(locked_tcb); 1546 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1547 } 1548 SCTP_INP_WUNLOCK(inp); 1549 SCTP_INP_INFO_RUNLOCK(); 1550 /* not found */ 1551 return (NULL); 1552 } 1553 1554 1555 /* 1556 * Find an association for a specific endpoint using the association id given 1557 * out in the COMM_UP notification 1558 */ 1559 struct sctp_tcb * 1560 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1561 { 1562 /* 1563 * Use my the assoc_id to find a endpoint 1564 */ 1565 struct sctpasochead *head; 1566 struct sctp_tcb *stcb; 1567 uint32_t id; 1568 1569 if (inp == NULL) { 1570 SCTP_PRINTF("TSNH ep_associd\n"); 1571 return (NULL); 1572 } 1573 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1574 SCTP_PRINTF("TSNH ep_associd0\n"); 1575 return (NULL); 1576 } 1577 id = (uint32_t) asoc_id; 1578 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1579 if (head == NULL) { 1580 /* invalid id TSNH */ 1581 SCTP_PRINTF("TSNH ep_associd1\n"); 1582 return (NULL); 1583 } 1584 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1585 if (stcb->asoc.assoc_id == id) { 1586 if (inp != stcb->sctp_ep) { 1587 /* 1588 * some other guy has the same id active (id 1589 * collision ??). 1590 */ 1591 SCTP_PRINTF("TSNH ep_associd2\n"); 1592 continue; 1593 } 1594 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1595 continue; 1596 } 1597 if (want_lock) { 1598 SCTP_TCB_LOCK(stcb); 1599 } 1600 return (stcb); 1601 } 1602 } 1603 return (NULL); 1604 } 1605 1606 1607 struct sctp_tcb * 1608 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1609 { 1610 struct sctp_tcb *stcb; 1611 1612 SCTP_INP_RLOCK(inp); 1613 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1614 SCTP_INP_RUNLOCK(inp); 1615 return (stcb); 1616 } 1617 1618 1619 /* 1620 * Endpoint probe expects that the INP_INFO is locked. 1621 */ 1622 static struct sctp_inpcb * 1623 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1624 uint16_t lport, uint32_t vrf_id) 1625 { 1626 struct sctp_inpcb *inp; 1627 struct sctp_laddr *laddr; 1628 1629 #ifdef INET 1630 struct sockaddr_in *sin; 1631 1632 #endif 1633 #ifdef INET6 1634 struct sockaddr_in6 *sin6; 1635 struct sockaddr_in6 *intf_addr6; 1636 1637 #endif 1638 int fnd; 1639 1640 #ifdef INET 1641 sin = NULL; 1642 #endif 1643 #ifdef INET6 1644 sin6 = NULL; 1645 #endif 1646 switch (nam->sa_family) { 1647 #ifdef INET 1648 case AF_INET: 1649 sin = (struct sockaddr_in *)nam; 1650 break; 1651 #endif 1652 #ifdef INET6 1653 case AF_INET6: 1654 sin6 = (struct sockaddr_in6 *)nam; 1655 break; 1656 #endif 1657 default: 1658 /* unsupported family */ 1659 return (NULL); 1660 } 1661 1662 if (head == NULL) 1663 return (NULL); 1664 1665 LIST_FOREACH(inp, head, sctp_hash) { 1666 SCTP_INP_RLOCK(inp); 1667 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1668 SCTP_INP_RUNLOCK(inp); 1669 continue; 1670 } 1671 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1672 (inp->sctp_lport == lport)) { 1673 /* got it */ 1674 switch (nam->sa_family) { 1675 #ifdef INET 1676 case AF_INET: 1677 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1678 SCTP_IPV6_V6ONLY(inp)) { 1679 /* 1680 * IPv4 on a IPv6 socket with ONLY 1681 * IPv6 set 1682 */ 1683 SCTP_INP_RUNLOCK(inp); 1684 continue; 1685 } 1686 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1687 &sin->sin_addr) != 0) { 1688 SCTP_INP_RUNLOCK(inp); 1689 continue; 1690 } 1691 break; 1692 #endif 1693 #ifdef INET6 1694 case AF_INET6: 1695 /* 1696 * A V6 address and the endpoint is NOT 1697 * bound V6 1698 */ 1699 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1700 SCTP_INP_RUNLOCK(inp); 1701 continue; 1702 } 1703 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1704 &sin6->sin6_addr) != 0) { 1705 SCTP_INP_RUNLOCK(inp); 1706 continue; 1707 } 1708 break; 1709 #endif 1710 default: 1711 break; 1712 } 1713 /* does a VRF id match? */ 1714 fnd = 0; 1715 if (inp->def_vrf_id == vrf_id) 1716 fnd = 1; 1717 1718 SCTP_INP_RUNLOCK(inp); 1719 if (!fnd) 1720 continue; 1721 return (inp); 1722 } 1723 SCTP_INP_RUNLOCK(inp); 1724 } 1725 switch (nam->sa_family) { 1726 #ifdef INET 1727 case AF_INET: 1728 if (sin->sin_addr.s_addr == INADDR_ANY) { 1729 /* Can't hunt for one that has no address specified */ 1730 return (NULL); 1731 } 1732 break; 1733 #endif 1734 #ifdef INET6 1735 case AF_INET6: 1736 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1737 /* Can't hunt for one that has no address specified */ 1738 return (NULL); 1739 } 1740 break; 1741 #endif 1742 default: 1743 break; 1744 } 1745 /* 1746 * ok, not bound to all so see if we can find a EP bound to this 1747 * address. 1748 */ 1749 LIST_FOREACH(inp, head, sctp_hash) { 1750 SCTP_INP_RLOCK(inp); 1751 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1752 SCTP_INP_RUNLOCK(inp); 1753 continue; 1754 } 1755 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1756 SCTP_INP_RUNLOCK(inp); 1757 continue; 1758 } 1759 /* 1760 * Ok this could be a likely candidate, look at all of its 1761 * addresses 1762 */ 1763 if (inp->sctp_lport != lport) { 1764 SCTP_INP_RUNLOCK(inp); 1765 continue; 1766 } 1767 /* does a VRF id match? */ 1768 fnd = 0; 1769 if (inp->def_vrf_id == vrf_id) 1770 fnd = 1; 1771 1772 if (!fnd) { 1773 SCTP_INP_RUNLOCK(inp); 1774 continue; 1775 } 1776 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1777 if (laddr->ifa == NULL) { 1778 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1779 __FUNCTION__); 1780 continue; 1781 } 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1783 (void *)laddr->ifa); 1784 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1785 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1786 continue; 1787 } 1788 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1789 /* possible, see if it matches */ 1790 switch (nam->sa_family) { 1791 #ifdef INET 1792 case AF_INET: 1793 if (sin->sin_addr.s_addr == 1794 laddr->ifa->address.sin.sin_addr.s_addr) { 1795 SCTP_INP_RUNLOCK(inp); 1796 return (inp); 1797 } 1798 break; 1799 #endif 1800 #ifdef INET6 1801 case AF_INET6: 1802 intf_addr6 = &laddr->ifa->address.sin6; 1803 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1804 intf_addr6)) { 1805 SCTP_INP_RUNLOCK(inp); 1806 return (inp); 1807 } 1808 break; 1809 #endif 1810 } 1811 } 1812 } 1813 SCTP_INP_RUNLOCK(inp); 1814 } 1815 return (NULL); 1816 } 1817 1818 1819 static struct sctp_inpcb * 1820 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1821 { 1822 struct sctppcbhead *head; 1823 struct sctp_inpcb *t_inp; 1824 int fnd; 1825 1826 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1827 SCTP_BASE_INFO(hashmark))]; 1828 LIST_FOREACH(t_inp, head, sctp_hash) { 1829 if (t_inp->sctp_lport != lport) { 1830 continue; 1831 } 1832 /* is it in the VRF in question */ 1833 fnd = 0; 1834 if (t_inp->def_vrf_id == vrf_id) 1835 fnd = 1; 1836 if (!fnd) 1837 continue; 1838 1839 /* This one is in use. */ 1840 /* check the v6/v4 binding issue */ 1841 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1842 SCTP_IPV6_V6ONLY(t_inp)) { 1843 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1844 /* collision in V6 space */ 1845 return (t_inp); 1846 } else { 1847 /* inp is BOUND_V4 no conflict */ 1848 continue; 1849 } 1850 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1851 /* t_inp is bound v4 and v6, conflict always */ 1852 return (t_inp); 1853 } else { 1854 /* t_inp is bound only V4 */ 1855 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1856 SCTP_IPV6_V6ONLY(inp)) { 1857 /* no conflict */ 1858 continue; 1859 } 1860 /* else fall through to conflict */ 1861 } 1862 return (t_inp); 1863 } 1864 return (NULL); 1865 } 1866 1867 1868 int 1869 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1870 { 1871 /* For 1-2-1 with port reuse */ 1872 struct sctppcbhead *head; 1873 struct sctp_inpcb *tinp; 1874 1875 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1876 /* only works with port reuse on */ 1877 return (-1); 1878 } 1879 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1880 return (0); 1881 } 1882 SCTP_INP_RUNLOCK(inp); 1883 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1884 SCTP_BASE_INFO(hashmark))]; 1885 /* Kick out all non-listeners to the TCP hash */ 1886 LIST_FOREACH(tinp, head, sctp_hash) { 1887 if (tinp->sctp_lport != inp->sctp_lport) { 1888 continue; 1889 } 1890 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1891 continue; 1892 } 1893 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1894 continue; 1895 } 1896 if (tinp->sctp_socket->so_qlimit) { 1897 continue; 1898 } 1899 SCTP_INP_WLOCK(tinp); 1900 LIST_REMOVE(tinp, sctp_hash); 1901 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1902 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1903 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1904 SCTP_INP_WUNLOCK(tinp); 1905 } 1906 SCTP_INP_WLOCK(inp); 1907 /* Pull from where he was */ 1908 LIST_REMOVE(inp, sctp_hash); 1909 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1910 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1911 LIST_INSERT_HEAD(head, inp, sctp_hash); 1912 SCTP_INP_WUNLOCK(inp); 1913 SCTP_INP_RLOCK(inp); 1914 return (0); 1915 } 1916 1917 1918 struct sctp_inpcb * 1919 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1920 uint32_t vrf_id) 1921 { 1922 /* 1923 * First we check the hash table to see if someone has this port 1924 * bound with just the port. 1925 */ 1926 struct sctp_inpcb *inp; 1927 struct sctppcbhead *head; 1928 int lport; 1929 unsigned int i; 1930 1931 #ifdef INET 1932 struct sockaddr_in *sin; 1933 1934 #endif 1935 #ifdef INET6 1936 struct sockaddr_in6 *sin6; 1937 1938 #endif 1939 1940 switch (nam->sa_family) { 1941 #ifdef INET 1942 case AF_INET: 1943 sin = (struct sockaddr_in *)nam; 1944 lport = sin->sin_port; 1945 break; 1946 #endif 1947 #ifdef INET6 1948 case AF_INET6: 1949 sin6 = (struct sockaddr_in6 *)nam; 1950 lport = sin6->sin6_port; 1951 break; 1952 #endif 1953 default: 1954 return (NULL); 1955 } 1956 /* 1957 * I could cheat here and just cast to one of the types but we will 1958 * do it right. It also provides the check against an Unsupported 1959 * type too. 1960 */ 1961 /* Find the head of the ALLADDR chain */ 1962 if (have_lock == 0) { 1963 SCTP_INP_INFO_RLOCK(); 1964 } 1965 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1966 SCTP_BASE_INFO(hashmark))]; 1967 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1968 1969 /* 1970 * If the TCP model exists it could be that the main listening 1971 * endpoint is gone but there still exists a connected socket for 1972 * this guy. If so we can return the first one that we find. This 1973 * may NOT be the correct one so the caller should be wary on the 1974 * returned INP. Currently the only caller that sets find_tcp_pool 1975 * is in bindx where we are verifying that a user CAN bind the 1976 * address. He either has bound it already, or someone else has, or 1977 * its open to bind, so this is good enough. 1978 */ 1979 if (inp == NULL && find_tcp_pool) { 1980 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1981 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1982 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1983 if (inp) { 1984 break; 1985 } 1986 } 1987 } 1988 if (inp) { 1989 SCTP_INP_INCR_REF(inp); 1990 } 1991 if (have_lock == 0) { 1992 SCTP_INP_INFO_RUNLOCK(); 1993 } 1994 return (inp); 1995 } 1996 1997 1998 /* 1999 * Find an association for an endpoint with the pointer to whom you want to 2000 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2001 * need to change the *to to some other struct like a mbuf... 2002 */ 2003 struct sctp_tcb * 2004 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2005 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2006 uint32_t vrf_id) 2007 { 2008 struct sctp_inpcb *inp = NULL; 2009 struct sctp_tcb *stcb; 2010 2011 SCTP_INP_INFO_RLOCK(); 2012 if (find_tcp_pool) { 2013 if (inp_p != NULL) { 2014 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2015 vrf_id); 2016 } else { 2017 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2018 vrf_id); 2019 } 2020 if (stcb != NULL) { 2021 SCTP_INP_INFO_RUNLOCK(); 2022 return (stcb); 2023 } 2024 } 2025 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2026 if (inp_p != NULL) { 2027 *inp_p = inp; 2028 } 2029 SCTP_INP_INFO_RUNLOCK(); 2030 if (inp == NULL) { 2031 return (NULL); 2032 } 2033 /* 2034 * ok, we have an endpoint, now lets find the assoc for it (if any) 2035 * we now place the source address or from in the to of the find 2036 * endpoint call. Since in reality this chain is used from the 2037 * inbound packet side. 2038 */ 2039 if (inp_p != NULL) { 2040 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2041 NULL); 2042 } else { 2043 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2044 NULL); 2045 } 2046 return (stcb); 2047 } 2048 2049 2050 /* 2051 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2052 * find all addresses that the sender has specified in any address list. Each 2053 * address will be used to lookup the TCB and see if one exits. 2054 */ 2055 static struct sctp_tcb * 2056 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2057 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2058 struct sockaddr *dst) 2059 { 2060 struct sctp_paramhdr *phdr, parm_buf; 2061 2062 #if defined(INET) || defined(INET6) 2063 struct sctp_tcb *stcb; 2064 uint16_t ptype; 2065 2066 #endif 2067 uint16_t plen; 2068 2069 #ifdef INET 2070 struct sockaddr_in sin4; 2071 2072 #endif 2073 #ifdef INET6 2074 struct sockaddr_in6 sin6; 2075 2076 #endif 2077 2078 #ifdef INET 2079 memset(&sin4, 0, sizeof(sin4)); 2080 sin4.sin_len = sizeof(sin4); 2081 sin4.sin_family = AF_INET; 2082 sin4.sin_port = sh->src_port; 2083 #endif 2084 #ifdef INET6 2085 memset(&sin6, 0, sizeof(sin6)); 2086 sin6.sin6_len = sizeof(sin6); 2087 sin6.sin6_family = AF_INET6; 2088 sin6.sin6_port = sh->src_port; 2089 #endif 2090 2091 offset += sizeof(struct sctp_init_chunk); 2092 2093 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2094 while (phdr != NULL) { 2095 /* now we must see if we want the parameter */ 2096 #if defined(INET) || defined(INET6) 2097 ptype = ntohs(phdr->param_type); 2098 #endif 2099 plen = ntohs(phdr->param_length); 2100 if (plen == 0) { 2101 break; 2102 } 2103 #ifdef INET 2104 if (ptype == SCTP_IPV4_ADDRESS && 2105 plen == sizeof(struct sctp_ipv4addr_param)) { 2106 /* Get the rest of the address */ 2107 struct sctp_ipv4addr_param ip4_parm, *p4; 2108 2109 phdr = sctp_get_next_param(m, offset, 2110 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2111 if (phdr == NULL) { 2112 return (NULL); 2113 } 2114 p4 = (struct sctp_ipv4addr_param *)phdr; 2115 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2116 /* look it up */ 2117 stcb = sctp_findassociation_ep_addr(inp_p, 2118 (struct sockaddr *)&sin4, netp, dst, NULL); 2119 if (stcb != NULL) { 2120 return (stcb); 2121 } 2122 } 2123 #endif 2124 #ifdef INET6 2125 if (ptype == SCTP_IPV6_ADDRESS && 2126 plen == sizeof(struct sctp_ipv6addr_param)) { 2127 /* Get the rest of the address */ 2128 struct sctp_ipv6addr_param ip6_parm, *p6; 2129 2130 phdr = sctp_get_next_param(m, offset, 2131 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2132 if (phdr == NULL) { 2133 return (NULL); 2134 } 2135 p6 = (struct sctp_ipv6addr_param *)phdr; 2136 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2137 /* look it up */ 2138 stcb = sctp_findassociation_ep_addr(inp_p, 2139 (struct sockaddr *)&sin6, netp, dst, NULL); 2140 if (stcb != NULL) { 2141 return (stcb); 2142 } 2143 } 2144 #endif 2145 offset += SCTP_SIZE32(plen); 2146 phdr = sctp_get_next_param(m, offset, &parm_buf, 2147 sizeof(parm_buf)); 2148 } 2149 return (NULL); 2150 } 2151 2152 static struct sctp_tcb * 2153 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2154 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2155 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2156 { 2157 /* 2158 * Use my vtag to hash. If we find it we then verify the source addr 2159 * is in the assoc. If all goes well we save a bit on rec of a 2160 * packet. 2161 */ 2162 struct sctpasochead *head; 2163 struct sctp_nets *net; 2164 struct sctp_tcb *stcb; 2165 2166 SCTP_INP_INFO_RLOCK(); 2167 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2168 SCTP_BASE_INFO(hashasocmark))]; 2169 if (head == NULL) { 2170 /* invalid vtag */ 2171 SCTP_INP_INFO_RUNLOCK(); 2172 return (NULL); 2173 } 2174 LIST_FOREACH(stcb, head, sctp_asocs) { 2175 SCTP_INP_RLOCK(stcb->sctp_ep); 2176 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2177 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2178 continue; 2179 } 2180 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2181 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2182 continue; 2183 } 2184 SCTP_TCB_LOCK(stcb); 2185 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2186 if (stcb->asoc.my_vtag == vtag) { 2187 /* candidate */ 2188 if (stcb->rport != rport) { 2189 SCTP_TCB_UNLOCK(stcb); 2190 continue; 2191 } 2192 if (stcb->sctp_ep->sctp_lport != lport) { 2193 SCTP_TCB_UNLOCK(stcb); 2194 continue; 2195 } 2196 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 /* RRS:Need toaddr check here */ 2201 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2202 /* Endpoint does not own this address */ 2203 SCTP_TCB_UNLOCK(stcb); 2204 continue; 2205 } 2206 if (remote_tag) { 2207 /* 2208 * If we have both vtags that's all we match 2209 * on 2210 */ 2211 if (stcb->asoc.peer_vtag == remote_tag) { 2212 /* 2213 * If both tags match we consider it 2214 * conclusive and check NO 2215 * source/destination addresses 2216 */ 2217 goto conclusive; 2218 } 2219 } 2220 if (skip_src_check) { 2221 conclusive: 2222 if (from) { 2223 *netp = sctp_findnet(stcb, from); 2224 } else { 2225 *netp = NULL; /* unknown */ 2226 } 2227 if (inp_p) 2228 *inp_p = stcb->sctp_ep; 2229 SCTP_INP_INFO_RUNLOCK(); 2230 return (stcb); 2231 } 2232 net = sctp_findnet(stcb, from); 2233 if (net) { 2234 /* yep its him. */ 2235 *netp = net; 2236 SCTP_STAT_INCR(sctps_vtagexpress); 2237 *inp_p = stcb->sctp_ep; 2238 SCTP_INP_INFO_RUNLOCK(); 2239 return (stcb); 2240 } else { 2241 /* 2242 * not him, this should only happen in rare 2243 * cases so I peg it. 2244 */ 2245 SCTP_STAT_INCR(sctps_vtagbogus); 2246 } 2247 } 2248 SCTP_TCB_UNLOCK(stcb); 2249 } 2250 SCTP_INP_INFO_RUNLOCK(); 2251 return (NULL); 2252 } 2253 2254 2255 /* 2256 * Find an association with the pointer to the inbound IP packet. This can be 2257 * a IPv4 or IPv6 packet. 2258 */ 2259 struct sctp_tcb * 2260 sctp_findassociation_addr(struct mbuf *m, int offset, 2261 struct sockaddr *src, struct sockaddr *dst, 2262 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2263 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2264 { 2265 int find_tcp_pool; 2266 struct sctp_tcb *stcb; 2267 struct sctp_inpcb *inp; 2268 2269 if (sh->v_tag) { 2270 /* we only go down this path if vtag is non-zero */ 2271 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2272 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2273 if (stcb) { 2274 return (stcb); 2275 } 2276 } 2277 find_tcp_pool = 0; 2278 if ((ch->chunk_type != SCTP_INITIATION) && 2279 (ch->chunk_type != SCTP_INITIATION_ACK) && 2280 (ch->chunk_type != SCTP_COOKIE_ACK) && 2281 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2282 /* Other chunk types go to the tcp pool. */ 2283 find_tcp_pool = 1; 2284 } 2285 if (inp_p) { 2286 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2287 find_tcp_pool, vrf_id); 2288 inp = *inp_p; 2289 } else { 2290 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2291 find_tcp_pool, vrf_id); 2292 } 2293 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2294 if (stcb == NULL && inp) { 2295 /* Found a EP but not this address */ 2296 if ((ch->chunk_type == SCTP_INITIATION) || 2297 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2298 /*- 2299 * special hook, we do NOT return linp or an 2300 * association that is linked to an existing 2301 * association that is under the TCP pool (i.e. no 2302 * listener exists). The endpoint finding routine 2303 * will always find a listener before examining the 2304 * TCP pool. 2305 */ 2306 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2307 if (inp_p) { 2308 *inp_p = NULL; 2309 } 2310 return (NULL); 2311 } 2312 stcb = sctp_findassociation_special_addr(m, 2313 offset, sh, &inp, netp, dst); 2314 if (inp_p != NULL) { 2315 *inp_p = inp; 2316 } 2317 } 2318 } 2319 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2320 return (stcb); 2321 } 2322 2323 /* 2324 * lookup an association by an ASCONF lookup address. 2325 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2326 */ 2327 struct sctp_tcb * 2328 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2329 struct sockaddr *dst, struct sctphdr *sh, 2330 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2331 { 2332 struct sctp_tcb *stcb; 2333 union sctp_sockstore remote_store; 2334 struct sctp_paramhdr parm_buf, *phdr; 2335 int ptype; 2336 int zero_address = 0; 2337 2338 #ifdef INET 2339 struct sockaddr_in *sin; 2340 2341 #endif 2342 #ifdef INET6 2343 struct sockaddr_in6 *sin6; 2344 2345 #endif 2346 2347 memset(&remote_store, 0, sizeof(remote_store)); 2348 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2349 &parm_buf, sizeof(struct sctp_paramhdr)); 2350 if (phdr == NULL) { 2351 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2352 __FUNCTION__); 2353 return NULL; 2354 } 2355 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2356 /* get the correlation address */ 2357 switch (ptype) { 2358 #ifdef INET6 2359 case SCTP_IPV6_ADDRESS: 2360 { 2361 /* ipv6 address param */ 2362 struct sctp_ipv6addr_param *p6, p6_buf; 2363 2364 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2365 return NULL; 2366 } 2367 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2368 offset + sizeof(struct sctp_asconf_chunk), 2369 &p6_buf.ph, sizeof(*p6)); 2370 if (p6 == NULL) { 2371 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2372 __FUNCTION__); 2373 return (NULL); 2374 } 2375 sin6 = &remote_store.sin6; 2376 sin6->sin6_family = AF_INET6; 2377 sin6->sin6_len = sizeof(*sin6); 2378 sin6->sin6_port = sh->src_port; 2379 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2380 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2381 zero_address = 1; 2382 break; 2383 } 2384 #endif 2385 #ifdef INET 2386 case SCTP_IPV4_ADDRESS: 2387 { 2388 /* ipv4 address param */ 2389 struct sctp_ipv4addr_param *p4, p4_buf; 2390 2391 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2392 return NULL; 2393 } 2394 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2395 offset + sizeof(struct sctp_asconf_chunk), 2396 &p4_buf.ph, sizeof(*p4)); 2397 if (p4 == NULL) { 2398 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2399 __FUNCTION__); 2400 return (NULL); 2401 } 2402 sin = &remote_store.sin; 2403 sin->sin_family = AF_INET; 2404 sin->sin_len = sizeof(*sin); 2405 sin->sin_port = sh->src_port; 2406 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2407 if (sin->sin_addr.s_addr == INADDR_ANY) 2408 zero_address = 1; 2409 break; 2410 } 2411 #endif 2412 default: 2413 /* invalid address param type */ 2414 return NULL; 2415 } 2416 2417 if (zero_address) { 2418 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2419 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2420 if (stcb != NULL) { 2421 SCTP_INP_DECR_REF(*inp_p); 2422 } 2423 } else { 2424 stcb = sctp_findassociation_ep_addr(inp_p, 2425 &remote_store.sa, netp, 2426 dst, NULL); 2427 } 2428 return (stcb); 2429 } 2430 2431 2432 /* 2433 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2434 * addresses. This way if we don't get a bind we by default pick a ephemeral 2435 * port with all addresses bound. 2436 */ 2437 int 2438 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2439 { 2440 /* 2441 * we get called when a new endpoint starts up. We need to allocate 2442 * the sctp_inpcb structure from the zone and init it. Mark it as 2443 * unbound and find a port that we can use as an ephemeral with 2444 * INADDR_ANY. If the user binds later no problem we can then add in 2445 * the specific addresses. And setup the default parameters for the 2446 * EP. 2447 */ 2448 int i, error; 2449 struct sctp_inpcb *inp; 2450 struct sctp_pcb *m; 2451 struct timeval time; 2452 sctp_sharedkey_t *null_key; 2453 2454 error = 0; 2455 2456 SCTP_INP_INFO_WLOCK(); 2457 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2458 if (inp == NULL) { 2459 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2460 SCTP_INP_INFO_WUNLOCK(); 2461 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2462 return (ENOBUFS); 2463 } 2464 /* zap it */ 2465 bzero(inp, sizeof(*inp)); 2466 2467 /* bump generations */ 2468 /* setup socket pointers */ 2469 inp->sctp_socket = so; 2470 inp->ip_inp.inp.inp_socket = so; 2471 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2472 #ifdef INET6 2473 if (INP_SOCKAF(so) == AF_INET6) { 2474 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2475 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2476 } 2477 if (MODULE_GLOBAL(ip6_v6only)) { 2478 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2479 } 2480 } 2481 #endif 2482 inp->sctp_associd_counter = 1; 2483 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2484 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2485 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2486 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2487 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2488 inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable); 2489 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2490 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2491 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2492 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2493 /* init the small hash table we use to track asocid <-> tcb */ 2494 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2495 if (inp->sctp_asocidhash == NULL) { 2496 crfree(inp->ip_inp.inp.inp_cred); 2497 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2498 SCTP_INP_INFO_WUNLOCK(); 2499 return (ENOBUFS); 2500 } 2501 #ifdef IPSEC 2502 { 2503 struct inpcbpolicy *pcb_sp = NULL; 2504 2505 error = ipsec_init_policy(so, &pcb_sp); 2506 /* Arrange to share the policy */ 2507 inp->ip_inp.inp.inp_sp = pcb_sp; 2508 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2509 } 2510 if (error != 0) { 2511 crfree(inp->ip_inp.inp.inp_cred); 2512 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2513 SCTP_INP_INFO_WUNLOCK(); 2514 return error; 2515 } 2516 #endif /* IPSEC */ 2517 SCTP_INCR_EP_COUNT(); 2518 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2519 SCTP_INP_INFO_WUNLOCK(); 2520 2521 so->so_pcb = (caddr_t)inp; 2522 2523 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2524 /* UDP style socket */ 2525 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2526 SCTP_PCB_FLAGS_UNBOUND); 2527 /* Be sure it is NON-BLOCKING IO for UDP */ 2528 /* SCTP_SET_SO_NBIO(so); */ 2529 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2530 /* TCP style socket */ 2531 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2532 SCTP_PCB_FLAGS_UNBOUND); 2533 /* Be sure we have blocking IO by default */ 2534 SCTP_CLEAR_SO_NBIO(so); 2535 } else { 2536 /* 2537 * unsupported socket type (RAW, etc)- in case we missed it 2538 * in protosw 2539 */ 2540 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2541 so->so_pcb = NULL; 2542 crfree(inp->ip_inp.inp.inp_cred); 2543 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2544 return (EOPNOTSUPP); 2545 } 2546 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2547 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2548 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2549 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2550 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2551 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2552 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2553 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2554 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2555 } 2556 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2557 &inp->sctp_hashmark); 2558 if (inp->sctp_tcbhash == NULL) { 2559 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2560 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2561 so->so_pcb = NULL; 2562 crfree(inp->ip_inp.inp.inp_cred); 2563 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2564 return (ENOBUFS); 2565 } 2566 inp->def_vrf_id = vrf_id; 2567 2568 SCTP_INP_INFO_WLOCK(); 2569 SCTP_INP_LOCK_INIT(inp); 2570 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2571 SCTP_INP_READ_INIT(inp); 2572 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2573 /* lock the new ep */ 2574 SCTP_INP_WLOCK(inp); 2575 2576 /* add it to the info area */ 2577 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2578 SCTP_INP_INFO_WUNLOCK(); 2579 2580 TAILQ_INIT(&inp->read_queue); 2581 LIST_INIT(&inp->sctp_addr_list); 2582 2583 LIST_INIT(&inp->sctp_asoc_list); 2584 2585 #ifdef SCTP_TRACK_FREED_ASOCS 2586 /* TEMP CODE */ 2587 LIST_INIT(&inp->sctp_asoc_free_list); 2588 #endif 2589 /* Init the timer structure for signature change */ 2590 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2591 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2592 2593 /* now init the actual endpoint default data */ 2594 m = &inp->sctp_ep; 2595 2596 /* setup the base timeout information */ 2597 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2598 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2599 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2600 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2601 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2602 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2603 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2604 /* all max/min max are in ms */ 2605 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2606 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2607 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2608 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2609 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2610 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2611 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2612 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2613 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2614 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2615 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2616 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2617 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2618 2619 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2620 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2621 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2622 /* number of streams to pre-open on a association */ 2623 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2624 2625 /* Add adaptation cookie */ 2626 m->adaptation_layer_indicator = 0; 2627 m->adaptation_layer_indicator_provided = 0; 2628 2629 /* seed random number generator */ 2630 m->random_counter = 1; 2631 m->store_at = SCTP_SIGNATURE_SIZE; 2632 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2633 sctp_fill_random_store(m); 2634 2635 /* Minimum cookie size */ 2636 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2637 sizeof(struct sctp_state_cookie); 2638 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2639 2640 /* Setup the initial secret */ 2641 (void)SCTP_GETTIME_TIMEVAL(&time); 2642 m->time_of_secret_change = time.tv_sec; 2643 2644 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2645 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2646 } 2647 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2648 2649 /* How long is a cookie good for ? */ 2650 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2651 /* 2652 * Initialize authentication parameters 2653 */ 2654 m->local_hmacs = sctp_default_supported_hmaclist(); 2655 m->local_auth_chunks = sctp_alloc_chunklist(); 2656 if (inp->asconf_supported) { 2657 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2658 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2659 } 2660 m->default_dscp = 0; 2661 #ifdef INET6 2662 m->default_flowlabel = 0; 2663 #endif 2664 m->port = 0; /* encapsulation disabled by default */ 2665 LIST_INIT(&m->shared_keys); 2666 /* add default NULL key as key id 0 */ 2667 null_key = sctp_alloc_sharedkey(); 2668 sctp_insert_sharedkey(&m->shared_keys, null_key); 2669 SCTP_INP_WUNLOCK(inp); 2670 #ifdef SCTP_LOG_CLOSING 2671 sctp_log_closing(inp, NULL, 12); 2672 #endif 2673 return (error); 2674 } 2675 2676 2677 void 2678 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2679 struct sctp_tcb *stcb) 2680 { 2681 struct sctp_nets *net; 2682 uint16_t lport, rport; 2683 struct sctppcbhead *head; 2684 struct sctp_laddr *laddr, *oladdr; 2685 2686 atomic_add_int(&stcb->asoc.refcnt, 1); 2687 SCTP_TCB_UNLOCK(stcb); 2688 SCTP_INP_INFO_WLOCK(); 2689 SCTP_INP_WLOCK(old_inp); 2690 SCTP_INP_WLOCK(new_inp); 2691 SCTP_TCB_LOCK(stcb); 2692 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2693 2694 new_inp->sctp_ep.time_of_secret_change = 2695 old_inp->sctp_ep.time_of_secret_change; 2696 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2697 sizeof(old_inp->sctp_ep.secret_key)); 2698 new_inp->sctp_ep.current_secret_number = 2699 old_inp->sctp_ep.current_secret_number; 2700 new_inp->sctp_ep.last_secret_number = 2701 old_inp->sctp_ep.last_secret_number; 2702 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2703 2704 /* make it so new data pours into the new socket */ 2705 stcb->sctp_socket = new_inp->sctp_socket; 2706 stcb->sctp_ep = new_inp; 2707 2708 /* Copy the port across */ 2709 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2710 rport = stcb->rport; 2711 /* Pull the tcb from the old association */ 2712 LIST_REMOVE(stcb, sctp_tcbhash); 2713 LIST_REMOVE(stcb, sctp_tcblist); 2714 if (stcb->asoc.in_asocid_hash) { 2715 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2716 } 2717 /* Now insert the new_inp into the TCP connected hash */ 2718 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2719 2720 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2721 /* Its safe to access */ 2722 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2723 2724 /* Now move the tcb into the endpoint list */ 2725 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2726 /* 2727 * Question, do we even need to worry about the ep-hash since we 2728 * only have one connection? Probably not :> so lets get rid of it 2729 * and not suck up any kernel memory in that. 2730 */ 2731 if (stcb->asoc.in_asocid_hash) { 2732 struct sctpasochead *lhd; 2733 2734 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2735 new_inp->hashasocidmark)]; 2736 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2737 } 2738 /* Ok. Let's restart timer. */ 2739 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2740 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2741 stcb, net); 2742 } 2743 2744 SCTP_INP_INFO_WUNLOCK(); 2745 if (new_inp->sctp_tcbhash != NULL) { 2746 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2747 new_inp->sctp_tcbhash = NULL; 2748 } 2749 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2750 /* Subset bound, so copy in the laddr list from the old_inp */ 2751 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2752 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2753 if (laddr == NULL) { 2754 /* 2755 * Gak, what can we do? This assoc is really 2756 * HOSED. We probably should send an abort 2757 * here. 2758 */ 2759 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2760 continue; 2761 } 2762 SCTP_INCR_LADDR_COUNT(); 2763 bzero(laddr, sizeof(*laddr)); 2764 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2765 laddr->ifa = oladdr->ifa; 2766 atomic_add_int(&laddr->ifa->refcount, 1); 2767 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2768 sctp_nxt_addr); 2769 new_inp->laddr_count++; 2770 if (oladdr == stcb->asoc.last_used_address) { 2771 stcb->asoc.last_used_address = laddr; 2772 } 2773 } 2774 } 2775 /* 2776 * Now any running timers need to be adjusted since we really don't 2777 * care if they are running or not just blast in the new_inp into 2778 * all of them. 2779 */ 2780 2781 stcb->asoc.dack_timer.ep = (void *)new_inp; 2782 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2783 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2784 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2785 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2786 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2787 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2788 /* now what about the nets? */ 2789 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2790 net->pmtu_timer.ep = (void *)new_inp; 2791 net->hb_timer.ep = (void *)new_inp; 2792 net->rxt_timer.ep = (void *)new_inp; 2793 } 2794 SCTP_INP_WUNLOCK(new_inp); 2795 SCTP_INP_WUNLOCK(old_inp); 2796 } 2797 2798 2799 2800 2801 /* sctp_ifap is used to bypass normal local address validation checks */ 2802 int 2803 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2804 struct sctp_ifa *sctp_ifap, struct thread *p) 2805 { 2806 /* bind a ep to a socket address */ 2807 struct sctppcbhead *head; 2808 struct sctp_inpcb *inp, *inp_tmp; 2809 struct inpcb *ip_inp; 2810 int port_reuse_active = 0; 2811 int bindall; 2812 uint16_t lport; 2813 int error; 2814 uint32_t vrf_id; 2815 2816 lport = 0; 2817 bindall = 1; 2818 inp = (struct sctp_inpcb *)so->so_pcb; 2819 ip_inp = (struct inpcb *)so->so_pcb; 2820 #ifdef SCTP_DEBUG 2821 if (addr) { 2822 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2823 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2824 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2825 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2826 } 2827 #endif 2828 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2829 /* already did a bind, subsequent binds NOT allowed ! */ 2830 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2831 return (EINVAL); 2832 } 2833 #ifdef INVARIANTS 2834 if (p == NULL) 2835 panic("null proc/thread"); 2836 #endif 2837 if (addr != NULL) { 2838 switch (addr->sa_family) { 2839 #ifdef INET 2840 case AF_INET: 2841 { 2842 struct sockaddr_in *sin; 2843 2844 /* IPV6_V6ONLY socket? */ 2845 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2846 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2847 return (EINVAL); 2848 } 2849 if (addr->sa_len != sizeof(*sin)) { 2850 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2851 return (EINVAL); 2852 } 2853 sin = (struct sockaddr_in *)addr; 2854 lport = sin->sin_port; 2855 /* 2856 * For LOOPBACK the prison_local_ip4() call 2857 * will transmute the ip address to the 2858 * proper value. 2859 */ 2860 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2861 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2862 return (error); 2863 } 2864 if (sin->sin_addr.s_addr != INADDR_ANY) { 2865 bindall = 0; 2866 } 2867 break; 2868 } 2869 #endif 2870 #ifdef INET6 2871 case AF_INET6: 2872 { 2873 /* 2874 * Only for pure IPv6 Address. (No IPv4 2875 * Mapped!) 2876 */ 2877 struct sockaddr_in6 *sin6; 2878 2879 sin6 = (struct sockaddr_in6 *)addr; 2880 2881 if (addr->sa_len != sizeof(*sin6)) { 2882 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2883 return (EINVAL); 2884 } 2885 lport = sin6->sin6_port; 2886 /* 2887 * For LOOPBACK the prison_local_ip6() call 2888 * will transmute the ipv6 address to the 2889 * proper value. 2890 */ 2891 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2892 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2893 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2894 return (error); 2895 } 2896 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2897 bindall = 0; 2898 /* KAME hack: embed scopeid */ 2899 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2900 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2901 return (EINVAL); 2902 } 2903 } 2904 /* this must be cleared for ifa_ifwithaddr() */ 2905 sin6->sin6_scope_id = 0; 2906 break; 2907 } 2908 #endif 2909 default: 2910 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2911 return (EAFNOSUPPORT); 2912 } 2913 } 2914 SCTP_INP_INFO_WLOCK(); 2915 SCTP_INP_WLOCK(inp); 2916 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2917 vrf_id = inp->def_vrf_id; 2918 2919 /* increase our count due to the unlock we do */ 2920 SCTP_INP_INCR_REF(inp); 2921 if (lport) { 2922 /* 2923 * Did the caller specify a port? if so we must see if an ep 2924 * already has this one bound. 2925 */ 2926 /* got to be root to get at low ports */ 2927 if (ntohs(lport) < IPPORT_RESERVED) { 2928 if (p && (error = 2929 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2930 )) { 2931 SCTP_INP_DECR_REF(inp); 2932 SCTP_INP_WUNLOCK(inp); 2933 SCTP_INP_INFO_WUNLOCK(); 2934 return (error); 2935 } 2936 } 2937 SCTP_INP_WUNLOCK(inp); 2938 if (bindall) { 2939 vrf_id = inp->def_vrf_id; 2940 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2941 if (inp_tmp != NULL) { 2942 /* 2943 * lock guy returned and lower count note 2944 * that we are not bound so inp_tmp should 2945 * NEVER be inp. And it is this inp 2946 * (inp_tmp) that gets the reference bump, 2947 * so we must lower it. 2948 */ 2949 SCTP_INP_DECR_REF(inp_tmp); 2950 /* unlock info */ 2951 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2952 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2953 /* 2954 * Ok, must be one-2-one and 2955 * allowing port re-use 2956 */ 2957 port_reuse_active = 1; 2958 goto continue_anyway; 2959 } 2960 SCTP_INP_DECR_REF(inp); 2961 SCTP_INP_INFO_WUNLOCK(); 2962 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2963 return (EADDRINUSE); 2964 } 2965 } else { 2966 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2967 if (inp_tmp != NULL) { 2968 /* 2969 * lock guy returned and lower count note 2970 * that we are not bound so inp_tmp should 2971 * NEVER be inp. And it is this inp 2972 * (inp_tmp) that gets the reference bump, 2973 * so we must lower it. 2974 */ 2975 SCTP_INP_DECR_REF(inp_tmp); 2976 /* unlock info */ 2977 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2978 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2979 /* 2980 * Ok, must be one-2-one and 2981 * allowing port re-use 2982 */ 2983 port_reuse_active = 1; 2984 goto continue_anyway; 2985 } 2986 SCTP_INP_DECR_REF(inp); 2987 SCTP_INP_INFO_WUNLOCK(); 2988 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2989 return (EADDRINUSE); 2990 } 2991 } 2992 continue_anyway: 2993 SCTP_INP_WLOCK(inp); 2994 if (bindall) { 2995 /* verify that no lport is not used by a singleton */ 2996 if ((port_reuse_active == 0) && 2997 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2998 /* Sorry someone already has this one bound */ 2999 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3000 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3001 port_reuse_active = 1; 3002 } else { 3003 SCTP_INP_DECR_REF(inp); 3004 SCTP_INP_WUNLOCK(inp); 3005 SCTP_INP_INFO_WUNLOCK(); 3006 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3007 return (EADDRINUSE); 3008 } 3009 } 3010 } 3011 } else { 3012 uint16_t first, last, candidate; 3013 uint16_t count; 3014 int done; 3015 3016 if (ip_inp->inp_flags & INP_HIGHPORT) { 3017 first = MODULE_GLOBAL(ipport_hifirstauto); 3018 last = MODULE_GLOBAL(ipport_hilastauto); 3019 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3020 if (p && (error = 3021 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3022 )) { 3023 SCTP_INP_DECR_REF(inp); 3024 SCTP_INP_WUNLOCK(inp); 3025 SCTP_INP_INFO_WUNLOCK(); 3026 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3027 return (error); 3028 } 3029 first = MODULE_GLOBAL(ipport_lowfirstauto); 3030 last = MODULE_GLOBAL(ipport_lowlastauto); 3031 } else { 3032 first = MODULE_GLOBAL(ipport_firstauto); 3033 last = MODULE_GLOBAL(ipport_lastauto); 3034 } 3035 if (first > last) { 3036 uint16_t temp; 3037 3038 temp = first; 3039 first = last; 3040 last = temp; 3041 } 3042 count = last - first + 1; /* number of candidates */ 3043 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3044 3045 done = 0; 3046 while (!done) { 3047 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3048 done = 1; 3049 } 3050 if (!done) { 3051 if (--count == 0) { 3052 SCTP_INP_DECR_REF(inp); 3053 SCTP_INP_WUNLOCK(inp); 3054 SCTP_INP_INFO_WUNLOCK(); 3055 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3056 return (EADDRINUSE); 3057 } 3058 if (candidate == last) 3059 candidate = first; 3060 else 3061 candidate = candidate + 1; 3062 } 3063 } 3064 lport = htons(candidate); 3065 } 3066 SCTP_INP_DECR_REF(inp); 3067 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3068 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3069 /* 3070 * this really should not happen. The guy did a non-blocking 3071 * bind and then did a close at the same time. 3072 */ 3073 SCTP_INP_WUNLOCK(inp); 3074 SCTP_INP_INFO_WUNLOCK(); 3075 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3076 return (EINVAL); 3077 } 3078 /* ok we look clear to give out this port, so lets setup the binding */ 3079 if (bindall) { 3080 /* binding to all addresses, so just set in the proper flags */ 3081 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3082 /* set the automatic addr changes from kernel flag */ 3083 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3084 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3085 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3086 } else { 3087 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3088 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3089 } 3090 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3091 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3092 } else { 3093 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3094 } 3095 /* 3096 * set the automatic mobility_base from kernel flag (by 3097 * micchie) 3098 */ 3099 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3100 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3101 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3102 } else { 3103 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3105 } 3106 /* 3107 * set the automatic mobility_fasthandoff from kernel flag 3108 * (by micchie) 3109 */ 3110 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3111 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3112 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3113 } else { 3114 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3115 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3116 } 3117 } else { 3118 /* 3119 * bind specific, make sure flags is off and add a new 3120 * address structure to the sctp_addr_list inside the ep 3121 * structure. 3122 * 3123 * We will need to allocate one and insert it at the head. The 3124 * socketopt call can just insert new addresses in there as 3125 * well. It will also have to do the embed scope kame hack 3126 * too (before adding). 3127 */ 3128 struct sctp_ifa *ifa; 3129 union sctp_sockstore store; 3130 3131 memset(&store, 0, sizeof(store)); 3132 switch (addr->sa_family) { 3133 #ifdef INET 3134 case AF_INET: 3135 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3136 store.sin.sin_port = 0; 3137 break; 3138 #endif 3139 #ifdef INET6 3140 case AF_INET6: 3141 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3142 store.sin6.sin6_port = 0; 3143 break; 3144 #endif 3145 default: 3146 break; 3147 } 3148 /* 3149 * first find the interface with the bound address need to 3150 * zero out the port to find the address! yuck! can't do 3151 * this earlier since need port for sctp_pcb_findep() 3152 */ 3153 if (sctp_ifap != NULL) { 3154 ifa = sctp_ifap; 3155 } else { 3156 /* 3157 * Note for BSD we hit here always other O/S's will 3158 * pass things in via the sctp_ifap argument 3159 * (Panda). 3160 */ 3161 ifa = sctp_find_ifa_by_addr(&store.sa, 3162 vrf_id, SCTP_ADDR_NOT_LOCKED); 3163 } 3164 if (ifa == NULL) { 3165 /* Can't find an interface with that address */ 3166 SCTP_INP_WUNLOCK(inp); 3167 SCTP_INP_INFO_WUNLOCK(); 3168 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3169 return (EADDRNOTAVAIL); 3170 } 3171 #ifdef INET6 3172 if (addr->sa_family == AF_INET6) { 3173 /* GAK, more FIXME IFA lock? */ 3174 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3175 /* Can't bind a non-existent addr. */ 3176 SCTP_INP_WUNLOCK(inp); 3177 SCTP_INP_INFO_WUNLOCK(); 3178 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3179 return (EINVAL); 3180 } 3181 } 3182 #endif 3183 /* we're not bound all */ 3184 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3185 /* allow bindx() to send ASCONF's for binding changes */ 3186 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3187 /* clear automatic addr changes from kernel flag */ 3188 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3189 3190 /* add this address to the endpoint list */ 3191 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3192 if (error != 0) { 3193 SCTP_INP_WUNLOCK(inp); 3194 SCTP_INP_INFO_WUNLOCK(); 3195 return (error); 3196 } 3197 inp->laddr_count++; 3198 } 3199 /* find the bucket */ 3200 if (port_reuse_active) { 3201 /* Put it into tcp 1-2-1 hash */ 3202 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3203 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3204 } else { 3205 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3206 } 3207 /* put it in the bucket */ 3208 LIST_INSERT_HEAD(head, inp, sctp_hash); 3209 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3210 (void *)head, ntohs(lport), port_reuse_active); 3211 /* set in the port */ 3212 inp->sctp_lport = lport; 3213 3214 /* turn off just the unbound flag */ 3215 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3216 SCTP_INP_WUNLOCK(inp); 3217 SCTP_INP_INFO_WUNLOCK(); 3218 return (0); 3219 } 3220 3221 3222 static void 3223 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3224 { 3225 struct sctp_iterator *it, *nit; 3226 3227 /* 3228 * We enter with the only the ITERATOR_LOCK in place and a write 3229 * lock on the inp_info stuff. 3230 */ 3231 it = sctp_it_ctl.cur_it; 3232 if (it && (it->vn != curvnet)) { 3233 /* Its not looking at our VNET */ 3234 return; 3235 } 3236 if (it && (it->inp == inp)) { 3237 /* 3238 * This is tricky and we hold the iterator lock, but when it 3239 * returns and gets the lock (when we release it) the 3240 * iterator will try to operate on inp. We need to stop that 3241 * from happening. But of course the iterator has a 3242 * reference on the stcb and inp. We can mark it and it will 3243 * stop. 3244 * 3245 * If its a single iterator situation, we set the end iterator 3246 * flag. Otherwise we set the iterator to go to the next 3247 * inp. 3248 * 3249 */ 3250 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3251 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3252 } else { 3253 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3254 } 3255 } 3256 /* 3257 * Now go through and remove any single reference to our inp that 3258 * may be still pending on the list 3259 */ 3260 SCTP_IPI_ITERATOR_WQ_LOCK(); 3261 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3262 if (it->vn != curvnet) { 3263 continue; 3264 } 3265 if (it->inp == inp) { 3266 /* This one points to me is it inp specific? */ 3267 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3268 /* Remove and free this one */ 3269 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3270 it, sctp_nxt_itr); 3271 if (it->function_atend != NULL) { 3272 (*it->function_atend) (it->pointer, it->val); 3273 } 3274 SCTP_FREE(it, SCTP_M_ITER); 3275 } else { 3276 it->inp = LIST_NEXT(it->inp, sctp_list); 3277 if (it->inp) { 3278 SCTP_INP_INCR_REF(it->inp); 3279 } 3280 } 3281 /* 3282 * When its put in the refcnt is incremented so decr 3283 * it 3284 */ 3285 SCTP_INP_DECR_REF(inp); 3286 } 3287 } 3288 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3289 } 3290 3291 /* release sctp_inpcb unbind the port */ 3292 void 3293 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3294 { 3295 /* 3296 * Here we free a endpoint. We must find it (if it is in the Hash 3297 * table) and remove it from there. Then we must also find it in the 3298 * overall list and remove it from there. After all removals are 3299 * complete then any timer has to be stopped. Then start the actual 3300 * freeing. a) Any local lists. b) Any associations. c) The hash of 3301 * all associations. d) finally the ep itself. 3302 */ 3303 struct sctp_tcb *asoc, *nasoc; 3304 struct sctp_laddr *laddr, *nladdr; 3305 struct inpcb *ip_pcb; 3306 struct socket *so; 3307 int being_refed = 0; 3308 struct sctp_queued_to_read *sq, *nsq; 3309 int cnt; 3310 sctp_sharedkey_t *shared_key, *nshared_key; 3311 3312 3313 #ifdef SCTP_LOG_CLOSING 3314 sctp_log_closing(inp, NULL, 0); 3315 #endif 3316 SCTP_ITERATOR_LOCK(); 3317 /* mark any iterators on the list or being processed */ 3318 sctp_iterator_inp_being_freed(inp); 3319 SCTP_ITERATOR_UNLOCK(); 3320 so = inp->sctp_socket; 3321 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3322 /* been here before.. eeks.. get out of here */ 3323 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3324 #ifdef SCTP_LOG_CLOSING 3325 sctp_log_closing(inp, NULL, 1); 3326 #endif 3327 return; 3328 } 3329 SCTP_ASOC_CREATE_LOCK(inp); 3330 SCTP_INP_INFO_WLOCK(); 3331 3332 SCTP_INP_WLOCK(inp); 3333 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3334 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3335 /* socket is gone, so no more wakeups allowed */ 3336 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3337 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3338 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3339 3340 } 3341 /* First time through we have the socket lock, after that no more. */ 3342 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3343 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3344 3345 if (inp->control) { 3346 sctp_m_freem(inp->control); 3347 inp->control = NULL; 3348 } 3349 if (inp->pkt) { 3350 sctp_m_freem(inp->pkt); 3351 inp->pkt = NULL; 3352 } 3353 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3354 * here but I will be nice :> (i.e. 3355 * ip_pcb = ep;) */ 3356 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3357 int cnt_in_sd; 3358 3359 cnt_in_sd = 0; 3360 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3361 SCTP_TCB_LOCK(asoc); 3362 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3363 /* Skip guys being freed */ 3364 cnt_in_sd++; 3365 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3366 /* 3367 * Special case - we did not start a 3368 * kill timer on the asoc due to it 3369 * was not closed. So go ahead and 3370 * start it now. 3371 */ 3372 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3373 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3374 } 3375 SCTP_TCB_UNLOCK(asoc); 3376 continue; 3377 } 3378 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3379 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3380 (asoc->asoc.total_output_queue_size == 0)) { 3381 /* 3382 * If we have data in queue, we don't want 3383 * to just free since the app may have done, 3384 * send()/close or connect/send/close. And 3385 * it wants the data to get across first. 3386 */ 3387 /* Just abandon things in the front states */ 3388 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3389 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3390 cnt_in_sd++; 3391 } 3392 continue; 3393 } 3394 /* Disconnect the socket please */ 3395 asoc->sctp_socket = NULL; 3396 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3397 if ((asoc->asoc.size_on_reasm_queue > 0) || 3398 (asoc->asoc.control_pdapi) || 3399 (asoc->asoc.size_on_all_streams > 0) || 3400 (so && (so->so_rcv.sb_cc > 0))) { 3401 /* Left with Data unread */ 3402 struct mbuf *op_err; 3403 3404 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3405 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3406 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3407 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3408 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3409 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3410 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3411 } 3412 if (sctp_free_assoc(inp, asoc, 3413 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3414 cnt_in_sd++; 3415 } 3416 continue; 3417 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3418 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3419 (asoc->asoc.stream_queue_cnt == 0)) { 3420 if (asoc->asoc.locked_on_sending) { 3421 goto abort_anyway; 3422 } 3423 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3424 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3425 struct sctp_nets *netp; 3426 3427 /* 3428 * there is nothing queued to send, 3429 * so I send shutdown 3430 */ 3431 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3432 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3433 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3434 } 3435 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3436 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3437 sctp_stop_timers_for_shutdown(asoc); 3438 if (asoc->asoc.alternate) { 3439 netp = asoc->asoc.alternate; 3440 } else { 3441 netp = asoc->asoc.primary_destination; 3442 } 3443 sctp_send_shutdown(asoc, netp); 3444 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3445 netp); 3446 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3447 asoc->asoc.primary_destination); 3448 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3449 } 3450 } else { 3451 /* mark into shutdown pending */ 3452 struct sctp_stream_queue_pending *sp; 3453 3454 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3455 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3456 asoc->asoc.primary_destination); 3457 if (asoc->asoc.locked_on_sending) { 3458 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3459 sctp_streamhead); 3460 if (sp == NULL) { 3461 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3462 (void *)asoc->asoc.locked_on_sending, 3463 asoc->asoc.locked_on_sending->stream_no); 3464 } else { 3465 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3466 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3467 } 3468 } 3469 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3470 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3471 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3472 struct mbuf *op_err; 3473 3474 abort_anyway: 3475 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3476 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3477 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3478 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3479 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3480 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3481 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3482 } 3483 if (sctp_free_assoc(inp, asoc, 3484 SCTP_PCBFREE_NOFORCE, 3485 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3486 cnt_in_sd++; 3487 } 3488 continue; 3489 } else { 3490 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3491 } 3492 } 3493 cnt_in_sd++; 3494 SCTP_TCB_UNLOCK(asoc); 3495 } 3496 /* now is there some left in our SHUTDOWN state? */ 3497 if (cnt_in_sd) { 3498 #ifdef SCTP_LOG_CLOSING 3499 sctp_log_closing(inp, NULL, 2); 3500 #endif 3501 inp->sctp_socket = NULL; 3502 SCTP_INP_WUNLOCK(inp); 3503 SCTP_ASOC_CREATE_UNLOCK(inp); 3504 SCTP_INP_INFO_WUNLOCK(); 3505 return; 3506 } 3507 } 3508 inp->sctp_socket = NULL; 3509 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3510 SCTP_PCB_FLAGS_UNBOUND) { 3511 /* 3512 * ok, this guy has been bound. It's port is somewhere in 3513 * the SCTP_BASE_INFO(hash table). Remove it! 3514 */ 3515 LIST_REMOVE(inp, sctp_hash); 3516 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3517 } 3518 /* 3519 * If there is a timer running to kill us, forget it, since it may 3520 * have a contest on the INP lock.. which would cause us to die ... 3521 */ 3522 cnt = 0; 3523 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3524 SCTP_TCB_LOCK(asoc); 3525 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3526 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3527 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3528 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3529 } 3530 cnt++; 3531 SCTP_TCB_UNLOCK(asoc); 3532 continue; 3533 } 3534 /* Free associations that are NOT killing us */ 3535 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3536 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3537 struct mbuf *op_err; 3538 3539 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3540 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3541 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3542 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3543 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3544 cnt++; 3545 SCTP_TCB_UNLOCK(asoc); 3546 continue; 3547 } 3548 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3549 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3550 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3551 } 3552 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3553 cnt++; 3554 } 3555 } 3556 if (cnt) { 3557 /* Ok we have someone out there that will kill us */ 3558 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3559 #ifdef SCTP_LOG_CLOSING 3560 sctp_log_closing(inp, NULL, 3); 3561 #endif 3562 SCTP_INP_WUNLOCK(inp); 3563 SCTP_ASOC_CREATE_UNLOCK(inp); 3564 SCTP_INP_INFO_WUNLOCK(); 3565 return; 3566 } 3567 if (SCTP_INP_LOCK_CONTENDED(inp)) 3568 being_refed++; 3569 if (SCTP_INP_READ_CONTENDED(inp)) 3570 being_refed++; 3571 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3572 being_refed++; 3573 3574 if ((inp->refcount) || 3575 (being_refed) || 3576 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3577 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3578 #ifdef SCTP_LOG_CLOSING 3579 sctp_log_closing(inp, NULL, 4); 3580 #endif 3581 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3582 SCTP_INP_WUNLOCK(inp); 3583 SCTP_ASOC_CREATE_UNLOCK(inp); 3584 SCTP_INP_INFO_WUNLOCK(); 3585 return; 3586 } 3587 inp->sctp_ep.signature_change.type = 0; 3588 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3589 /* 3590 * Remove it from the list .. last thing we need a lock for. 3591 */ 3592 LIST_REMOVE(inp, sctp_list); 3593 SCTP_INP_WUNLOCK(inp); 3594 SCTP_ASOC_CREATE_UNLOCK(inp); 3595 SCTP_INP_INFO_WUNLOCK(); 3596 /* 3597 * Now we release all locks. Since this INP cannot be found anymore 3598 * except possibly by the kill timer that might be running. We call 3599 * the drain function here. It should hit the case were it sees the 3600 * ACTIVE flag cleared and exit out freeing us to proceed and 3601 * destroy everything. 3602 */ 3603 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3604 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3605 } else { 3606 /* Probably un-needed */ 3607 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3608 } 3609 3610 #ifdef SCTP_LOG_CLOSING 3611 sctp_log_closing(inp, NULL, 5); 3612 #endif 3613 3614 3615 if ((inp->sctp_asocidhash) != NULL) { 3616 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3617 inp->sctp_asocidhash = NULL; 3618 } 3619 /* sa_ignore FREED_MEMORY */ 3620 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3621 /* Its only abandoned if it had data left */ 3622 if (sq->length) 3623 SCTP_STAT_INCR(sctps_left_abandon); 3624 3625 TAILQ_REMOVE(&inp->read_queue, sq, next); 3626 sctp_free_remote_addr(sq->whoFrom); 3627 if (so) 3628 so->so_rcv.sb_cc -= sq->length; 3629 if (sq->data) { 3630 sctp_m_freem(sq->data); 3631 sq->data = NULL; 3632 } 3633 /* 3634 * no need to free the net count, since at this point all 3635 * assoc's are gone. 3636 */ 3637 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3638 SCTP_DECR_READQ_COUNT(); 3639 } 3640 /* Now the sctp_pcb things */ 3641 /* 3642 * free each asoc if it is not already closed/free. we can't use the 3643 * macro here since le_next will get freed as part of the 3644 * sctp_free_assoc() call. 3645 */ 3646 if (so) { 3647 #ifdef IPSEC 3648 ipsec_delete_pcbpolicy(ip_pcb); 3649 #endif /* IPSEC */ 3650 3651 /* Unlocks not needed since the socket is gone now */ 3652 } 3653 if (ip_pcb->inp_options) { 3654 (void)sctp_m_free(ip_pcb->inp_options); 3655 ip_pcb->inp_options = 0; 3656 } 3657 #ifdef INET6 3658 if (ip_pcb->inp_vflag & INP_IPV6) { 3659 struct in6pcb *in6p; 3660 3661 in6p = (struct in6pcb *)inp; 3662 ip6_freepcbopts(in6p->in6p_outputopts); 3663 } 3664 #endif /* INET6 */ 3665 ip_pcb->inp_vflag = 0; 3666 /* free up authentication fields */ 3667 if (inp->sctp_ep.local_auth_chunks != NULL) 3668 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3669 if (inp->sctp_ep.local_hmacs != NULL) 3670 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3671 3672 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3673 LIST_REMOVE(shared_key, next); 3674 sctp_free_sharedkey(shared_key); 3675 /* sa_ignore FREED_MEMORY */ 3676 } 3677 3678 /* 3679 * if we have an address list the following will free the list of 3680 * ifaddr's that are set into this ep. Again macro limitations here, 3681 * since the LIST_FOREACH could be a bad idea. 3682 */ 3683 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3684 sctp_remove_laddr(laddr); 3685 } 3686 3687 #ifdef SCTP_TRACK_FREED_ASOCS 3688 /* TEMP CODE */ 3689 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3690 LIST_REMOVE(asoc, sctp_tcblist); 3691 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3692 SCTP_DECR_ASOC_COUNT(); 3693 } 3694 /* *** END TEMP CODE *** */ 3695 #endif 3696 /* Now lets see about freeing the EP hash table. */ 3697 if (inp->sctp_tcbhash != NULL) { 3698 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3699 inp->sctp_tcbhash = NULL; 3700 } 3701 /* Now we must put the ep memory back into the zone pool */ 3702 crfree(inp->ip_inp.inp.inp_cred); 3703 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3704 SCTP_INP_LOCK_DESTROY(inp); 3705 SCTP_INP_READ_DESTROY(inp); 3706 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3707 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3708 SCTP_DECR_EP_COUNT(); 3709 } 3710 3711 3712 struct sctp_nets * 3713 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3714 { 3715 struct sctp_nets *net; 3716 3717 /* locate the address */ 3718 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3719 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3720 return (net); 3721 } 3722 return (NULL); 3723 } 3724 3725 3726 int 3727 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3728 { 3729 struct sctp_ifa *sctp_ifa; 3730 3731 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3732 if (sctp_ifa) { 3733 return (1); 3734 } else { 3735 return (0); 3736 } 3737 } 3738 3739 /* 3740 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3741 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3742 * stats of stuff. 3743 */ 3744 int 3745 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3746 struct sctp_nets **netp, int set_scope, int from) 3747 { 3748 /* 3749 * The following is redundant to the same lines in the 3750 * sctp_aloc_assoc() but is needed since others call the add address 3751 * function 3752 */ 3753 struct sctp_nets *net, *netfirst; 3754 int addr_inscope; 3755 3756 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3757 from); 3758 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3759 3760 netfirst = sctp_findnet(stcb, newaddr); 3761 if (netfirst) { 3762 /* 3763 * Lie and return ok, we don't want to make the association 3764 * go away for this behavior. It will happen in the TCP 3765 * model in a connected socket. It does not reach the hash 3766 * table until after the association is built so it can't be 3767 * found. Mark as reachable, since the initial creation will 3768 * have been cleared and the NOT_IN_ASSOC flag will have 3769 * been added... and we don't want to end up removing it 3770 * back out. 3771 */ 3772 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3773 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3774 SCTP_ADDR_UNCONFIRMED); 3775 } else { 3776 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3777 } 3778 3779 return (0); 3780 } 3781 addr_inscope = 1; 3782 switch (newaddr->sa_family) { 3783 #ifdef INET 3784 case AF_INET: 3785 { 3786 struct sockaddr_in *sin; 3787 3788 sin = (struct sockaddr_in *)newaddr; 3789 if (sin->sin_addr.s_addr == 0) { 3790 /* Invalid address */ 3791 return (-1); 3792 } 3793 /* zero out the bzero area */ 3794 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3795 3796 /* assure len is set */ 3797 sin->sin_len = sizeof(struct sockaddr_in); 3798 if (set_scope) { 3799 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3800 stcb->asoc.scope.ipv4_local_scope = 1; 3801 #else 3802 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3803 stcb->asoc.scope.ipv4_local_scope = 1; 3804 } 3805 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3806 } else { 3807 /* Validate the address is in scope */ 3808 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3809 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3810 addr_inscope = 0; 3811 } 3812 } 3813 break; 3814 } 3815 #endif 3816 #ifdef INET6 3817 case AF_INET6: 3818 { 3819 struct sockaddr_in6 *sin6; 3820 3821 sin6 = (struct sockaddr_in6 *)newaddr; 3822 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3823 /* Invalid address */ 3824 return (-1); 3825 } 3826 /* assure len is set */ 3827 sin6->sin6_len = sizeof(struct sockaddr_in6); 3828 if (set_scope) { 3829 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3830 stcb->asoc.scope.loopback_scope = 1; 3831 stcb->asoc.scope.local_scope = 0; 3832 stcb->asoc.scope.ipv4_local_scope = 1; 3833 stcb->asoc.scope.site_scope = 1; 3834 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3835 /* 3836 * If the new destination is a 3837 * LINK_LOCAL we must have common 3838 * site scope. Don't set the local 3839 * scope since we may not share all 3840 * links, only loopback can do this. 3841 * Links on the local network would 3842 * also be on our private network 3843 * for v4 too. 3844 */ 3845 stcb->asoc.scope.ipv4_local_scope = 1; 3846 stcb->asoc.scope.site_scope = 1; 3847 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3848 /* 3849 * If the new destination is 3850 * SITE_LOCAL then we must have site 3851 * scope in common. 3852 */ 3853 stcb->asoc.scope.site_scope = 1; 3854 } 3855 } else { 3856 /* Validate the address is in scope */ 3857 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3858 (stcb->asoc.scope.loopback_scope == 0)) { 3859 addr_inscope = 0; 3860 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3861 (stcb->asoc.scope.local_scope == 0)) { 3862 addr_inscope = 0; 3863 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3864 (stcb->asoc.scope.site_scope == 0)) { 3865 addr_inscope = 0; 3866 } 3867 } 3868 break; 3869 } 3870 #endif 3871 default: 3872 /* not supported family type */ 3873 return (-1); 3874 } 3875 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3876 if (net == NULL) { 3877 return (-1); 3878 } 3879 SCTP_INCR_RADDR_COUNT(); 3880 bzero(net, sizeof(struct sctp_nets)); 3881 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3882 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3883 switch (newaddr->sa_family) { 3884 #ifdef INET 3885 case AF_INET: 3886 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3887 break; 3888 #endif 3889 #ifdef INET6 3890 case AF_INET6: 3891 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3892 break; 3893 #endif 3894 default: 3895 break; 3896 } 3897 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3898 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3899 stcb->asoc.scope.loopback_scope = 1; 3900 stcb->asoc.scope.ipv4_local_scope = 1; 3901 stcb->asoc.scope.local_scope = 0; 3902 stcb->asoc.scope.site_scope = 1; 3903 addr_inscope = 1; 3904 } 3905 net->failure_threshold = stcb->asoc.def_net_failure; 3906 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3907 if (addr_inscope == 0) { 3908 net->dest_state = (SCTP_ADDR_REACHABLE | 3909 SCTP_ADDR_OUT_OF_SCOPE); 3910 } else { 3911 if (from == SCTP_ADDR_IS_CONFIRMED) 3912 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3913 net->dest_state = SCTP_ADDR_REACHABLE; 3914 else 3915 net->dest_state = SCTP_ADDR_REACHABLE | 3916 SCTP_ADDR_UNCONFIRMED; 3917 } 3918 /* 3919 * We set this to 0, the timer code knows that this means its an 3920 * initial value 3921 */ 3922 net->rto_needed = 1; 3923 net->RTO = 0; 3924 net->RTO_measured = 0; 3925 stcb->asoc.numnets++; 3926 net->ref_count = 1; 3927 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3928 net->port = stcb->asoc.port; 3929 net->dscp = stcb->asoc.default_dscp; 3930 #ifdef INET6 3931 net->flowlabel = stcb->asoc.default_flowlabel; 3932 #endif 3933 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3934 net->dest_state |= SCTP_ADDR_NOHB; 3935 } else { 3936 net->dest_state &= ~SCTP_ADDR_NOHB; 3937 } 3938 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3939 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3940 } else { 3941 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3942 } 3943 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3944 /* Init the timer structure */ 3945 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3946 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3947 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3948 3949 /* Now generate a route for this guy */ 3950 #ifdef INET6 3951 /* KAME hack: embed scopeid */ 3952 if (newaddr->sa_family == AF_INET6) { 3953 struct sockaddr_in6 *sin6; 3954 3955 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3956 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3957 sin6->sin6_scope_id = 0; 3958 } 3959 #endif 3960 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3961 3962 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3963 /* Get source address */ 3964 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3965 stcb, 3966 (sctp_route_t *) & net->ro, 3967 net, 3968 0, 3969 stcb->asoc.vrf_id); 3970 if (net->ro._s_addr != NULL) { 3971 net->src_addr_selected = 1; 3972 /* Now get the interface MTU */ 3973 if (net->ro._s_addr->ifn_p != NULL) { 3974 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3975 } 3976 } else { 3977 net->src_addr_selected = 0; 3978 } 3979 if (net->mtu > 0) { 3980 uint32_t rmtu; 3981 3982 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3983 if (rmtu == 0) { 3984 /* 3985 * Start things off to match mtu of 3986 * interface please. 3987 */ 3988 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3989 net->ro.ro_rt, net->mtu); 3990 } else { 3991 /* 3992 * we take the route mtu over the interface, 3993 * since the route may be leading out the 3994 * loopback, or a different interface. 3995 */ 3996 net->mtu = rmtu; 3997 } 3998 } 3999 } else { 4000 net->src_addr_selected = 0; 4001 } 4002 if (net->mtu == 0) { 4003 switch (newaddr->sa_family) { 4004 #ifdef INET 4005 case AF_INET: 4006 net->mtu = SCTP_DEFAULT_MTU; 4007 break; 4008 #endif 4009 #ifdef INET6 4010 case AF_INET6: 4011 net->mtu = 1280; 4012 break; 4013 #endif 4014 default: 4015 break; 4016 } 4017 } 4018 #if defined(INET) || defined(INET6) 4019 if (net->port) { 4020 net->mtu -= (uint32_t) sizeof(struct udphdr); 4021 } 4022 #endif 4023 if (from == SCTP_ALLOC_ASOC) { 4024 stcb->asoc.smallest_mtu = net->mtu; 4025 } 4026 if (stcb->asoc.smallest_mtu > net->mtu) { 4027 stcb->asoc.smallest_mtu = net->mtu; 4028 } 4029 #ifdef INET6 4030 if (newaddr->sa_family == AF_INET6) { 4031 struct sockaddr_in6 *sin6; 4032 4033 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4034 (void)sa6_recoverscope(sin6); 4035 } 4036 #endif 4037 4038 /* JRS - Use the congestion control given in the CC module */ 4039 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4040 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4041 4042 /* 4043 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4044 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4045 */ 4046 net->find_pseudo_cumack = 1; 4047 net->find_rtx_pseudo_cumack = 1; 4048 /* Choose an initial flowid. */ 4049 net->flowid = stcb->asoc.my_vtag ^ 4050 ntohs(stcb->rport) ^ 4051 ntohs(stcb->sctp_ep->sctp_lport); 4052 #ifdef INVARIANTS 4053 net->flowidset = 1; 4054 #endif 4055 if (netp) { 4056 *netp = net; 4057 } 4058 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4059 if (net->ro.ro_rt == NULL) { 4060 /* Since we have no route put it at the back */ 4061 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4062 } else if (netfirst == NULL) { 4063 /* We are the first one in the pool. */ 4064 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4065 } else if (netfirst->ro.ro_rt == NULL) { 4066 /* 4067 * First one has NO route. Place this one ahead of the first 4068 * one. 4069 */ 4070 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4071 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4072 /* 4073 * This one has a different interface than the one at the 4074 * top of the list. Place it ahead. 4075 */ 4076 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4077 } else { 4078 /* 4079 * Ok we have the same interface as the first one. Move 4080 * forward until we find either a) one with a NULL route... 4081 * insert ahead of that b) one with a different ifp.. insert 4082 * after that. c) end of the list.. insert at the tail. 4083 */ 4084 struct sctp_nets *netlook; 4085 4086 do { 4087 netlook = TAILQ_NEXT(netfirst, sctp_next); 4088 if (netlook == NULL) { 4089 /* End of the list */ 4090 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4091 break; 4092 } else if (netlook->ro.ro_rt == NULL) { 4093 /* next one has NO route */ 4094 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4095 break; 4096 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4097 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4098 net, sctp_next); 4099 break; 4100 } 4101 /* Shift forward */ 4102 netfirst = netlook; 4103 } while (netlook != NULL); 4104 } 4105 4106 /* got to have a primary set */ 4107 if (stcb->asoc.primary_destination == 0) { 4108 stcb->asoc.primary_destination = net; 4109 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4110 (net->ro.ro_rt) && 4111 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4112 /* No route to current primary adopt new primary */ 4113 stcb->asoc.primary_destination = net; 4114 } 4115 /* Validate primary is first */ 4116 net = TAILQ_FIRST(&stcb->asoc.nets); 4117 if ((net != stcb->asoc.primary_destination) && 4118 (stcb->asoc.primary_destination)) { 4119 /* 4120 * first one on the list is NOT the primary sctp_cmpaddr() 4121 * is much more efficient if the primary is the first on the 4122 * list, make it so. 4123 */ 4124 TAILQ_REMOVE(&stcb->asoc.nets, 4125 stcb->asoc.primary_destination, sctp_next); 4126 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4127 stcb->asoc.primary_destination, sctp_next); 4128 } 4129 return (0); 4130 } 4131 4132 4133 static uint32_t 4134 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4135 { 4136 uint32_t id; 4137 struct sctpasochead *head; 4138 struct sctp_tcb *lstcb; 4139 4140 SCTP_INP_WLOCK(inp); 4141 try_again: 4142 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4143 /* TSNH */ 4144 SCTP_INP_WUNLOCK(inp); 4145 return (0); 4146 } 4147 /* 4148 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4149 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4150 */ 4151 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4152 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4153 } 4154 id = inp->sctp_associd_counter; 4155 inp->sctp_associd_counter++; 4156 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4157 if (lstcb) { 4158 goto try_again; 4159 } 4160 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4161 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4162 stcb->asoc.in_asocid_hash = 1; 4163 SCTP_INP_WUNLOCK(inp); 4164 return id; 4165 } 4166 4167 /* 4168 * allocate an association and add it to the endpoint. The caller must be 4169 * careful to add all additional addresses once they are know right away or 4170 * else the assoc will be may experience a blackout scenario. 4171 */ 4172 struct sctp_tcb * 4173 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4174 int *error, uint32_t override_tag, uint32_t vrf_id, 4175 struct thread *p 4176 ) 4177 { 4178 /* note the p argument is only valid in unbound sockets */ 4179 4180 struct sctp_tcb *stcb; 4181 struct sctp_association *asoc; 4182 struct sctpasochead *head; 4183 uint16_t rport; 4184 int err; 4185 4186 /* 4187 * Assumption made here: Caller has done a 4188 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4189 * address does not exist already. 4190 */ 4191 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4192 /* Hit max assoc, sorry no more */ 4193 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4194 *error = ENOBUFS; 4195 return (NULL); 4196 } 4197 if (firstaddr == NULL) { 4198 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4199 *error = EINVAL; 4200 return (NULL); 4201 } 4202 SCTP_INP_RLOCK(inp); 4203 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4204 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4205 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4206 /* 4207 * If its in the TCP pool, its NOT allowed to create an 4208 * association. The parent listener needs to call 4209 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4210 * off, or connected one does this.. its an error. 4211 */ 4212 SCTP_INP_RUNLOCK(inp); 4213 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4214 *error = EINVAL; 4215 return (NULL); 4216 } 4217 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4218 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4219 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4220 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4221 SCTP_INP_RUNLOCK(inp); 4222 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4223 *error = EINVAL; 4224 return (NULL); 4225 } 4226 } 4227 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4228 #ifdef SCTP_DEBUG 4229 if (firstaddr) { 4230 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4231 switch (firstaddr->sa_family) { 4232 #ifdef INET 4233 case AF_INET: 4234 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4235 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4236 break; 4237 #endif 4238 #ifdef INET6 4239 case AF_INET6: 4240 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4241 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4242 break; 4243 #endif 4244 default: 4245 break; 4246 } 4247 } else { 4248 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4249 } 4250 #endif /* SCTP_DEBUG */ 4251 switch (firstaddr->sa_family) { 4252 #ifdef INET 4253 case AF_INET: 4254 { 4255 struct sockaddr_in *sin; 4256 4257 sin = (struct sockaddr_in *)firstaddr; 4258 if ((ntohs(sin->sin_port) == 0) || 4259 (sin->sin_addr.s_addr == INADDR_ANY) || 4260 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4261 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4262 /* Invalid address */ 4263 SCTP_INP_RUNLOCK(inp); 4264 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4265 *error = EINVAL; 4266 return (NULL); 4267 } 4268 rport = sin->sin_port; 4269 break; 4270 } 4271 #endif 4272 #ifdef INET6 4273 case AF_INET6: 4274 { 4275 struct sockaddr_in6 *sin6; 4276 4277 sin6 = (struct sockaddr_in6 *)firstaddr; 4278 if ((ntohs(sin6->sin6_port) == 0) || 4279 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4280 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4281 /* Invalid address */ 4282 SCTP_INP_RUNLOCK(inp); 4283 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4284 *error = EINVAL; 4285 return (NULL); 4286 } 4287 rport = sin6->sin6_port; 4288 break; 4289 } 4290 #endif 4291 default: 4292 /* not supported family type */ 4293 SCTP_INP_RUNLOCK(inp); 4294 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4295 *error = EINVAL; 4296 return (NULL); 4297 } 4298 SCTP_INP_RUNLOCK(inp); 4299 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4300 /* 4301 * If you have not performed a bind, then we need to do the 4302 * ephemeral bind for you. 4303 */ 4304 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4305 (struct sockaddr *)NULL, 4306 (struct sctp_ifa *)NULL, 4307 p 4308 ))) { 4309 /* bind error, probably perm */ 4310 *error = err; 4311 return (NULL); 4312 } 4313 } 4314 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4315 if (stcb == NULL) { 4316 /* out of memory? */ 4317 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4318 *error = ENOMEM; 4319 return (NULL); 4320 } 4321 SCTP_INCR_ASOC_COUNT(); 4322 4323 bzero(stcb, sizeof(*stcb)); 4324 asoc = &stcb->asoc; 4325 4326 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4327 SCTP_TCB_LOCK_INIT(stcb); 4328 SCTP_TCB_SEND_LOCK_INIT(stcb); 4329 stcb->rport = rport; 4330 /* setup back pointer's */ 4331 stcb->sctp_ep = inp; 4332 stcb->sctp_socket = inp->sctp_socket; 4333 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4334 /* failed */ 4335 SCTP_TCB_LOCK_DESTROY(stcb); 4336 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4337 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4338 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4339 SCTP_DECR_ASOC_COUNT(); 4340 *error = err; 4341 return (NULL); 4342 } 4343 /* and the port */ 4344 SCTP_INP_INFO_WLOCK(); 4345 SCTP_INP_WLOCK(inp); 4346 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4347 /* inpcb freed while alloc going on */ 4348 SCTP_TCB_LOCK_DESTROY(stcb); 4349 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4350 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4351 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4352 SCTP_INP_WUNLOCK(inp); 4353 SCTP_INP_INFO_WUNLOCK(); 4354 SCTP_DECR_ASOC_COUNT(); 4355 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4356 *error = EINVAL; 4357 return (NULL); 4358 } 4359 SCTP_TCB_LOCK(stcb); 4360 4361 /* now that my_vtag is set, add it to the hash */ 4362 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4363 /* put it in the bucket in the vtag hash of assoc's for the system */ 4364 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4365 SCTP_INP_INFO_WUNLOCK(); 4366 4367 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4368 /* failure.. memory error? */ 4369 if (asoc->strmout) { 4370 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4371 asoc->strmout = NULL; 4372 } 4373 if (asoc->mapping_array) { 4374 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4375 asoc->mapping_array = NULL; 4376 } 4377 if (asoc->nr_mapping_array) { 4378 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4379 asoc->nr_mapping_array = NULL; 4380 } 4381 SCTP_DECR_ASOC_COUNT(); 4382 SCTP_TCB_UNLOCK(stcb); 4383 SCTP_TCB_LOCK_DESTROY(stcb); 4384 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4385 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4386 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4387 SCTP_INP_WUNLOCK(inp); 4388 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4389 *error = ENOBUFS; 4390 return (NULL); 4391 } 4392 /* Init all the timers */ 4393 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4394 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4395 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4396 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4397 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4398 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4399 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4400 4401 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4402 /* now file the port under the hash as well */ 4403 if (inp->sctp_tcbhash != NULL) { 4404 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4405 inp->sctp_hashmark)]; 4406 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4407 } 4408 SCTP_INP_WUNLOCK(inp); 4409 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4410 return (stcb); 4411 } 4412 4413 4414 void 4415 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4416 { 4417 struct sctp_association *asoc; 4418 4419 asoc = &stcb->asoc; 4420 asoc->numnets--; 4421 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4422 if (net == asoc->primary_destination) { 4423 /* Reset primary */ 4424 struct sctp_nets *lnet; 4425 4426 lnet = TAILQ_FIRST(&asoc->nets); 4427 /* 4428 * Mobility adaptation Ideally, if deleted destination is 4429 * the primary, it becomes a fast retransmission trigger by 4430 * the subsequent SET PRIMARY. (by micchie) 4431 */ 4432 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4433 SCTP_MOBILITY_BASE) || 4434 sctp_is_mobility_feature_on(stcb->sctp_ep, 4435 SCTP_MOBILITY_FASTHANDOFF)) { 4436 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4437 if (asoc->deleted_primary != NULL) { 4438 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4439 goto out; 4440 } 4441 asoc->deleted_primary = net; 4442 atomic_add_int(&net->ref_count, 1); 4443 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4444 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4445 sctp_mobility_feature_on(stcb->sctp_ep, 4446 SCTP_MOBILITY_PRIM_DELETED); 4447 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4448 stcb->sctp_ep, stcb, NULL); 4449 } 4450 out: 4451 /* Try to find a confirmed primary */ 4452 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4453 } 4454 if (net == asoc->last_data_chunk_from) { 4455 /* Reset primary */ 4456 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4457 } 4458 if (net == asoc->last_control_chunk_from) { 4459 /* Clear net */ 4460 asoc->last_control_chunk_from = NULL; 4461 } 4462 if (net == stcb->asoc.alternate) { 4463 sctp_free_remote_addr(stcb->asoc.alternate); 4464 stcb->asoc.alternate = NULL; 4465 } 4466 sctp_free_remote_addr(net); 4467 } 4468 4469 /* 4470 * remove a remote endpoint address from an association, it will fail if the 4471 * address does not exist. 4472 */ 4473 int 4474 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4475 { 4476 /* 4477 * Here we need to remove a remote address. This is quite simple, we 4478 * first find it in the list of address for the association 4479 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4480 * on that item. Note we do not allow it to be removed if there are 4481 * no other addresses. 4482 */ 4483 struct sctp_association *asoc; 4484 struct sctp_nets *net, *nnet; 4485 4486 asoc = &stcb->asoc; 4487 4488 /* locate the address */ 4489 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4490 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4491 continue; 4492 } 4493 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4494 remaddr)) { 4495 /* we found the guy */ 4496 if (asoc->numnets < 2) { 4497 /* Must have at LEAST two remote addresses */ 4498 return (-1); 4499 } else { 4500 sctp_remove_net(stcb, net); 4501 return (0); 4502 } 4503 } 4504 } 4505 /* not found. */ 4506 return (-2); 4507 } 4508 4509 void 4510 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4511 { 4512 struct sctpvtaghead *chain; 4513 struct sctp_tagblock *twait_block; 4514 int found = 0; 4515 int i; 4516 4517 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4518 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4519 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4520 if ((twait_block->vtag_block[i].v_tag == tag) && 4521 (twait_block->vtag_block[i].lport == lport) && 4522 (twait_block->vtag_block[i].rport == rport)) { 4523 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4524 twait_block->vtag_block[i].v_tag = 0; 4525 twait_block->vtag_block[i].lport = 0; 4526 twait_block->vtag_block[i].rport = 0; 4527 found = 1; 4528 break; 4529 } 4530 } 4531 if (found) 4532 break; 4533 } 4534 } 4535 4536 int 4537 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4538 { 4539 struct sctpvtaghead *chain; 4540 struct sctp_tagblock *twait_block; 4541 int found = 0; 4542 int i; 4543 4544 SCTP_INP_INFO_WLOCK(); 4545 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4546 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4547 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4548 if ((twait_block->vtag_block[i].v_tag == tag) && 4549 (twait_block->vtag_block[i].lport == lport) && 4550 (twait_block->vtag_block[i].rport == rport)) { 4551 found = 1; 4552 break; 4553 } 4554 } 4555 if (found) 4556 break; 4557 } 4558 SCTP_INP_INFO_WUNLOCK(); 4559 return (found); 4560 } 4561 4562 4563 void 4564 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4565 { 4566 struct sctpvtaghead *chain; 4567 struct sctp_tagblock *twait_block; 4568 struct timeval now; 4569 int set, i; 4570 4571 if (time == 0) { 4572 /* Its disabled */ 4573 return; 4574 } 4575 (void)SCTP_GETTIME_TIMEVAL(&now); 4576 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4577 set = 0; 4578 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4579 /* Block(s) present, lets find space, and expire on the fly */ 4580 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4581 if ((twait_block->vtag_block[i].v_tag == 0) && 4582 !set) { 4583 twait_block->vtag_block[i].tv_sec_at_expire = 4584 now.tv_sec + time; 4585 twait_block->vtag_block[i].v_tag = tag; 4586 twait_block->vtag_block[i].lport = lport; 4587 twait_block->vtag_block[i].rport = rport; 4588 set = 1; 4589 } else if ((twait_block->vtag_block[i].v_tag) && 4590 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4591 /* Audit expires this guy */ 4592 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4593 twait_block->vtag_block[i].v_tag = 0; 4594 twait_block->vtag_block[i].lport = 0; 4595 twait_block->vtag_block[i].rport = 0; 4596 if (set == 0) { 4597 /* Reuse it for my new tag */ 4598 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4599 twait_block->vtag_block[i].v_tag = tag; 4600 twait_block->vtag_block[i].lport = lport; 4601 twait_block->vtag_block[i].rport = rport; 4602 set = 1; 4603 } 4604 } 4605 } 4606 if (set) { 4607 /* 4608 * We only do up to the block where we can place our 4609 * tag for audits 4610 */ 4611 break; 4612 } 4613 } 4614 /* Need to add a new block to chain */ 4615 if (!set) { 4616 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4617 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4618 if (twait_block == NULL) { 4619 #ifdef INVARIANTS 4620 panic("Can not alloc tagblock"); 4621 #endif 4622 return; 4623 } 4624 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4625 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4626 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4627 twait_block->vtag_block[0].v_tag = tag; 4628 twait_block->vtag_block[0].lport = lport; 4629 twait_block->vtag_block[0].rport = rport; 4630 } 4631 } 4632 4633 4634 4635 /*- 4636 * Free the association after un-hashing the remote port. This 4637 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4638 * expect that the input to this function IS a locked TCB. 4639 * It will return 0, if it did NOT destroy the association (instead 4640 * it unlocks it. It will return NON-zero if it either destroyed the 4641 * association OR the association is already destroyed. 4642 */ 4643 int 4644 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4645 { 4646 int i; 4647 struct sctp_association *asoc; 4648 struct sctp_nets *net, *nnet; 4649 struct sctp_laddr *laddr, *naddr; 4650 struct sctp_tmit_chunk *chk, *nchk; 4651 struct sctp_asconf_addr *aparam, *naparam; 4652 struct sctp_asconf_ack *aack, *naack; 4653 struct sctp_stream_reset_list *strrst, *nstrrst; 4654 struct sctp_queued_to_read *sq, *nsq; 4655 struct sctp_stream_queue_pending *sp, *nsp; 4656 sctp_sharedkey_t *shared_key, *nshared_key; 4657 struct socket *so; 4658 4659 /* first, lets purge the entry from the hash table. */ 4660 4661 #ifdef SCTP_LOG_CLOSING 4662 sctp_log_closing(inp, stcb, 6); 4663 #endif 4664 if (stcb->asoc.state == 0) { 4665 #ifdef SCTP_LOG_CLOSING 4666 sctp_log_closing(inp, NULL, 7); 4667 #endif 4668 /* there is no asoc, really TSNH :-0 */ 4669 return (1); 4670 } 4671 if (stcb->asoc.alternate) { 4672 sctp_free_remote_addr(stcb->asoc.alternate); 4673 stcb->asoc.alternate = NULL; 4674 } 4675 /* TEMP CODE */ 4676 if (stcb->freed_from_where == 0) { 4677 /* Only record the first place free happened from */ 4678 stcb->freed_from_where = from_location; 4679 } 4680 /* TEMP CODE */ 4681 4682 asoc = &stcb->asoc; 4683 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4684 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4685 /* nothing around */ 4686 so = NULL; 4687 else 4688 so = inp->sctp_socket; 4689 4690 /* 4691 * We used timer based freeing if a reader or writer is in the way. 4692 * So we first check if we are actually being called from a timer, 4693 * if so we abort early if a reader or writer is still in the way. 4694 */ 4695 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4696 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4697 /* 4698 * is it the timer driving us? if so are the reader/writers 4699 * gone? 4700 */ 4701 if (stcb->asoc.refcnt) { 4702 /* nope, reader or writer in the way */ 4703 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4704 /* no asoc destroyed */ 4705 SCTP_TCB_UNLOCK(stcb); 4706 #ifdef SCTP_LOG_CLOSING 4707 sctp_log_closing(inp, stcb, 8); 4708 #endif 4709 return (0); 4710 } 4711 } 4712 /* now clean up any other timers */ 4713 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4714 asoc->dack_timer.self = NULL; 4715 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4716 /*- 4717 * For stream reset we don't blast this unless 4718 * it is a str-reset timer, it might be the 4719 * free-asoc timer which we DON'T want to 4720 * disturb. 4721 */ 4722 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4723 asoc->strreset_timer.self = NULL; 4724 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4725 asoc->asconf_timer.self = NULL; 4726 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4727 asoc->autoclose_timer.self = NULL; 4728 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4729 asoc->shut_guard_timer.self = NULL; 4730 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4731 asoc->delayed_event_timer.self = NULL; 4732 /* Mobility adaptation */ 4733 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4734 asoc->delete_prim_timer.self = NULL; 4735 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4736 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4737 net->rxt_timer.self = NULL; 4738 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4739 net->pmtu_timer.self = NULL; 4740 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4741 net->hb_timer.self = NULL; 4742 } 4743 /* Now the read queue needs to be cleaned up (only once) */ 4744 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4745 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4746 SCTP_INP_READ_LOCK(inp); 4747 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4748 if (sq->stcb == stcb) { 4749 sq->do_not_ref_stcb = 1; 4750 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4751 /* 4752 * If there is no end, there never will be 4753 * now. 4754 */ 4755 if (sq->end_added == 0) { 4756 /* Held for PD-API clear that. */ 4757 sq->pdapi_aborted = 1; 4758 sq->held_length = 0; 4759 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4760 /* 4761 * Need to add a PD-API 4762 * aborted indication. 4763 * Setting the control_pdapi 4764 * assures that it will be 4765 * added right after this 4766 * msg. 4767 */ 4768 uint32_t strseq; 4769 4770 stcb->asoc.control_pdapi = sq; 4771 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4772 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4773 stcb, 4774 SCTP_PARTIAL_DELIVERY_ABORTED, 4775 (void *)&strseq, 4776 SCTP_SO_LOCKED); 4777 stcb->asoc.control_pdapi = NULL; 4778 } 4779 } 4780 /* Add an end to wake them */ 4781 sq->end_added = 1; 4782 } 4783 } 4784 SCTP_INP_READ_UNLOCK(inp); 4785 if (stcb->block_entry) { 4786 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4787 stcb->block_entry->error = ECONNRESET; 4788 stcb->block_entry = NULL; 4789 } 4790 } 4791 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4792 /* 4793 * Someone holds a reference OR the socket is unaccepted 4794 * yet. 4795 */ 4796 if ((stcb->asoc.refcnt) || 4797 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4798 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4799 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4800 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4801 } 4802 SCTP_TCB_UNLOCK(stcb); 4803 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4804 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4805 /* nothing around */ 4806 so = NULL; 4807 if (so) { 4808 /* Wake any reader/writers */ 4809 sctp_sorwakeup(inp, so); 4810 sctp_sowwakeup(inp, so); 4811 } 4812 #ifdef SCTP_LOG_CLOSING 4813 sctp_log_closing(inp, stcb, 9); 4814 #endif 4815 /* no asoc destroyed */ 4816 return (0); 4817 } 4818 #ifdef SCTP_LOG_CLOSING 4819 sctp_log_closing(inp, stcb, 10); 4820 #endif 4821 /* 4822 * When I reach here, no others want to kill the assoc yet.. and I 4823 * own the lock. Now its possible an abort comes in when I do the 4824 * lock exchange below to grab all the locks to do the final take 4825 * out. to prevent this we increment the count, which will start a 4826 * timer and blow out above thus assuring us that we hold exclusive 4827 * killing of the asoc. Note that after getting back the TCB lock we 4828 * will go ahead and increment the counter back up and stop any 4829 * timer a passing stranger may have started :-S 4830 */ 4831 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4832 atomic_add_int(&stcb->asoc.refcnt, 1); 4833 4834 SCTP_TCB_UNLOCK(stcb); 4835 SCTP_INP_INFO_WLOCK(); 4836 SCTP_INP_WLOCK(inp); 4837 SCTP_TCB_LOCK(stcb); 4838 } 4839 /* Double check the GONE flag */ 4840 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4841 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4842 /* nothing around */ 4843 so = NULL; 4844 4845 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4846 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4847 /* 4848 * For TCP type we need special handling when we are 4849 * connected. We also include the peel'ed off ones to. 4850 */ 4851 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4852 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4853 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4854 if (so) { 4855 SOCK_LOCK(so); 4856 if (so->so_rcv.sb_cc == 0) { 4857 so->so_state &= ~(SS_ISCONNECTING | 4858 SS_ISDISCONNECTING | 4859 SS_ISCONFIRMING | 4860 SS_ISCONNECTED); 4861 } 4862 socantrcvmore_locked(so); 4863 sctp_sowwakeup(inp, so); 4864 sctp_sorwakeup(inp, so); 4865 SCTP_SOWAKEUP(so); 4866 } 4867 } 4868 } 4869 /* 4870 * Make it invalid too, that way if its about to run it will abort 4871 * and return. 4872 */ 4873 /* re-increment the lock */ 4874 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4875 atomic_add_int(&stcb->asoc.refcnt, -1); 4876 } 4877 if (stcb->asoc.refcnt) { 4878 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4879 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4880 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4881 SCTP_INP_INFO_WUNLOCK(); 4882 SCTP_INP_WUNLOCK(inp); 4883 } 4884 SCTP_TCB_UNLOCK(stcb); 4885 return (0); 4886 } 4887 asoc->state = 0; 4888 if (inp->sctp_tcbhash) { 4889 LIST_REMOVE(stcb, sctp_tcbhash); 4890 } 4891 if (stcb->asoc.in_asocid_hash) { 4892 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4893 } 4894 /* Now lets remove it from the list of ALL associations in the EP */ 4895 LIST_REMOVE(stcb, sctp_tcblist); 4896 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4897 SCTP_INP_INCR_REF(inp); 4898 SCTP_INP_WUNLOCK(inp); 4899 } 4900 /* pull from vtag hash */ 4901 LIST_REMOVE(stcb, sctp_asocs); 4902 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4903 inp->sctp_lport, stcb->rport); 4904 4905 /* 4906 * Now restop the timers to be sure this is paranoia at is finest! 4907 */ 4908 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4909 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4910 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4911 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4912 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4913 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4914 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4915 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4916 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4917 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4918 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4919 } 4920 4921 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4922 /* 4923 * The chunk lists and such SHOULD be empty but we check them just 4924 * in case. 4925 */ 4926 /* anything on the wheel needs to be removed */ 4927 for (i = 0; i < asoc->streamoutcnt; i++) { 4928 struct sctp_stream_out *outs; 4929 4930 outs = &asoc->strmout[i]; 4931 /* now clean up any chunks here */ 4932 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4933 TAILQ_REMOVE(&outs->outqueue, sp, next); 4934 sctp_free_spbufspace(stcb, asoc, sp); 4935 if (sp->data) { 4936 if (so) { 4937 /* Still an open socket - report */ 4938 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4939 0, (void *)sp, SCTP_SO_LOCKED); 4940 } 4941 if (sp->data) { 4942 sctp_m_freem(sp->data); 4943 sp->data = NULL; 4944 sp->tail_mbuf = NULL; 4945 sp->length = 0; 4946 } 4947 } 4948 if (sp->net) { 4949 sctp_free_remote_addr(sp->net); 4950 sp->net = NULL; 4951 } 4952 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4953 } 4954 } 4955 /* sa_ignore FREED_MEMORY */ 4956 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4957 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4958 SCTP_FREE(strrst, SCTP_M_STRESET); 4959 } 4960 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4961 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4962 if (sq->data) { 4963 sctp_m_freem(sq->data); 4964 sq->data = NULL; 4965 } 4966 sctp_free_remote_addr(sq->whoFrom); 4967 sq->whoFrom = NULL; 4968 sq->stcb = NULL; 4969 /* Free the ctl entry */ 4970 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4971 SCTP_DECR_READQ_COUNT(); 4972 /* sa_ignore FREED_MEMORY */ 4973 } 4974 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4975 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4976 if (chk->data) { 4977 sctp_m_freem(chk->data); 4978 chk->data = NULL; 4979 } 4980 if (chk->holds_key_ref) 4981 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4982 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4983 SCTP_DECR_CHK_COUNT(); 4984 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4985 asoc->free_chunk_cnt--; 4986 /* sa_ignore FREED_MEMORY */ 4987 } 4988 /* pending send queue SHOULD be empty */ 4989 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4990 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4991 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4992 #ifdef INVARIANTS 4993 } else { 4994 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4995 #endif 4996 } 4997 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4998 if (chk->data) { 4999 if (so) { 5000 /* Still a socket? */ 5001 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5002 0, chk, SCTP_SO_LOCKED); 5003 } 5004 if (chk->data) { 5005 sctp_m_freem(chk->data); 5006 chk->data = NULL; 5007 } 5008 } 5009 if (chk->holds_key_ref) 5010 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5011 if (chk->whoTo) { 5012 sctp_free_remote_addr(chk->whoTo); 5013 chk->whoTo = NULL; 5014 } 5015 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5016 SCTP_DECR_CHK_COUNT(); 5017 /* sa_ignore FREED_MEMORY */ 5018 } 5019 /* sent queue SHOULD be empty */ 5020 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5021 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5022 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5023 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5024 #ifdef INVARIANTS 5025 } else { 5026 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5027 #endif 5028 } 5029 } 5030 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5031 if (chk->data) { 5032 if (so) { 5033 /* Still a socket? */ 5034 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5035 0, chk, SCTP_SO_LOCKED); 5036 } 5037 if (chk->data) { 5038 sctp_m_freem(chk->data); 5039 chk->data = NULL; 5040 } 5041 } 5042 if (chk->holds_key_ref) 5043 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5044 sctp_free_remote_addr(chk->whoTo); 5045 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5046 SCTP_DECR_CHK_COUNT(); 5047 /* sa_ignore FREED_MEMORY */ 5048 } 5049 #ifdef INVARIANTS 5050 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5051 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5052 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5053 } 5054 } 5055 #endif 5056 /* control queue MAY not be empty */ 5057 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5058 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5059 if (chk->data) { 5060 sctp_m_freem(chk->data); 5061 chk->data = NULL; 5062 } 5063 if (chk->holds_key_ref) 5064 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5065 sctp_free_remote_addr(chk->whoTo); 5066 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5067 SCTP_DECR_CHK_COUNT(); 5068 /* sa_ignore FREED_MEMORY */ 5069 } 5070 /* ASCONF queue MAY not be empty */ 5071 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5072 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5073 if (chk->data) { 5074 sctp_m_freem(chk->data); 5075 chk->data = NULL; 5076 } 5077 if (chk->holds_key_ref) 5078 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5079 sctp_free_remote_addr(chk->whoTo); 5080 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5081 SCTP_DECR_CHK_COUNT(); 5082 /* sa_ignore FREED_MEMORY */ 5083 } 5084 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5085 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5086 if (chk->data) { 5087 sctp_m_freem(chk->data); 5088 chk->data = NULL; 5089 } 5090 if (chk->holds_key_ref) 5091 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5092 sctp_free_remote_addr(chk->whoTo); 5093 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5094 SCTP_DECR_CHK_COUNT(); 5095 /* sa_ignore FREED_MEMORY */ 5096 } 5097 5098 if (asoc->mapping_array) { 5099 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5100 asoc->mapping_array = NULL; 5101 } 5102 if (asoc->nr_mapping_array) { 5103 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5104 asoc->nr_mapping_array = NULL; 5105 } 5106 /* the stream outs */ 5107 if (asoc->strmout) { 5108 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5109 asoc->strmout = NULL; 5110 } 5111 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5112 if (asoc->strmin) { 5113 struct sctp_queued_to_read *ctl, *nctl; 5114 5115 for (i = 0; i < asoc->streamincnt; i++) { 5116 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5117 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5118 sctp_free_remote_addr(ctl->whoFrom); 5119 if (ctl->data) { 5120 sctp_m_freem(ctl->data); 5121 ctl->data = NULL; 5122 } 5123 /* 5124 * We don't free the address here since all 5125 * the net's were freed above. 5126 */ 5127 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5128 SCTP_DECR_READQ_COUNT(); 5129 } 5130 } 5131 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5132 asoc->strmin = NULL; 5133 } 5134 asoc->streamincnt = 0; 5135 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5136 #ifdef INVARIANTS 5137 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5138 panic("no net's left alloc'ed, or list points to itself"); 5139 } 5140 #endif 5141 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5142 sctp_free_remote_addr(net); 5143 } 5144 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5145 /* sa_ignore FREED_MEMORY */ 5146 sctp_remove_laddr(laddr); 5147 } 5148 5149 /* pending asconf (address) parameters */ 5150 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5151 /* sa_ignore FREED_MEMORY */ 5152 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5153 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5154 } 5155 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5156 /* sa_ignore FREED_MEMORY */ 5157 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5158 if (aack->data != NULL) { 5159 sctp_m_freem(aack->data); 5160 } 5161 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5162 } 5163 /* clean up auth stuff */ 5164 if (asoc->local_hmacs) 5165 sctp_free_hmaclist(asoc->local_hmacs); 5166 if (asoc->peer_hmacs) 5167 sctp_free_hmaclist(asoc->peer_hmacs); 5168 5169 if (asoc->local_auth_chunks) 5170 sctp_free_chunklist(asoc->local_auth_chunks); 5171 if (asoc->peer_auth_chunks) 5172 sctp_free_chunklist(asoc->peer_auth_chunks); 5173 5174 sctp_free_authinfo(&asoc->authinfo); 5175 5176 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5177 LIST_REMOVE(shared_key, next); 5178 sctp_free_sharedkey(shared_key); 5179 /* sa_ignore FREED_MEMORY */ 5180 } 5181 5182 /* Insert new items here :> */ 5183 5184 /* Get rid of LOCK */ 5185 SCTP_TCB_UNLOCK(stcb); 5186 SCTP_TCB_LOCK_DESTROY(stcb); 5187 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5188 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5189 SCTP_INP_INFO_WUNLOCK(); 5190 SCTP_INP_RLOCK(inp); 5191 } 5192 #ifdef SCTP_TRACK_FREED_ASOCS 5193 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5194 /* now clean up the tasoc itself */ 5195 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5196 SCTP_DECR_ASOC_COUNT(); 5197 } else { 5198 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5199 } 5200 #else 5201 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5202 SCTP_DECR_ASOC_COUNT(); 5203 #endif 5204 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5205 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5206 /* 5207 * If its NOT the inp_free calling us AND sctp_close 5208 * as been called, we call back... 5209 */ 5210 SCTP_INP_RUNLOCK(inp); 5211 /* 5212 * This will start the kill timer (if we are the 5213 * last one) since we hold an increment yet. But 5214 * this is the only safe way to do this since 5215 * otherwise if the socket closes at the same time 5216 * we are here we might collide in the cleanup. 5217 */ 5218 sctp_inpcb_free(inp, 5219 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5220 SCTP_CALLED_DIRECTLY_NOCMPSET); 5221 SCTP_INP_DECR_REF(inp); 5222 goto out_of; 5223 } else { 5224 /* The socket is still open. */ 5225 SCTP_INP_DECR_REF(inp); 5226 } 5227 } 5228 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5229 SCTP_INP_RUNLOCK(inp); 5230 } 5231 out_of: 5232 /* destroyed the asoc */ 5233 #ifdef SCTP_LOG_CLOSING 5234 sctp_log_closing(inp, NULL, 11); 5235 #endif 5236 return (1); 5237 } 5238 5239 5240 5241 /* 5242 * determine if a destination is "reachable" based upon the addresses bound 5243 * to the current endpoint (e.g. only v4 or v6 currently bound) 5244 */ 5245 /* 5246 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5247 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5248 * types bound as its endpoint 5249 */ 5250 int 5251 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5252 { 5253 struct sctp_inpcb *inp; 5254 int answer; 5255 5256 /* 5257 * No locks here, the TCB, in all cases is already locked and an 5258 * assoc is up. There is either a INP lock by the caller applied (in 5259 * asconf case when deleting an address) or NOT in the HB case, 5260 * however if HB then the INP increment is up and the INP will not 5261 * be removed (on top of the fact that we have a TCB lock). So we 5262 * only want to read the sctp_flags, which is either bound-all or 5263 * not.. no protection needed since once an assoc is up you can't be 5264 * changing your binding. 5265 */ 5266 inp = stcb->sctp_ep; 5267 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5268 /* if bound all, destination is not restricted */ 5269 /* 5270 * RRS: Question during lock work: Is this correct? If you 5271 * are bound-all you still might need to obey the V4--V6 5272 * flags??? IMO this bound-all stuff needs to be removed! 5273 */ 5274 return (1); 5275 } 5276 /* NOTE: all "scope" checks are done when local addresses are added */ 5277 switch (destaddr->sa_family) { 5278 #ifdef INET6 5279 case AF_INET6: 5280 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5281 break; 5282 #endif 5283 #ifdef INET 5284 case AF_INET: 5285 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5286 break; 5287 #endif 5288 default: 5289 /* invalid family, so it's unreachable */ 5290 answer = 0; 5291 break; 5292 } 5293 return (answer); 5294 } 5295 5296 /* 5297 * update the inp_vflags on an endpoint 5298 */ 5299 static void 5300 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5301 { 5302 struct sctp_laddr *laddr; 5303 5304 /* first clear the flag */ 5305 inp->ip_inp.inp.inp_vflag = 0; 5306 /* set the flag based on addresses on the ep list */ 5307 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5308 if (laddr->ifa == NULL) { 5309 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5310 __FUNCTION__); 5311 continue; 5312 } 5313 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5314 continue; 5315 } 5316 switch (laddr->ifa->address.sa.sa_family) { 5317 #ifdef INET6 5318 case AF_INET6: 5319 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5320 break; 5321 #endif 5322 #ifdef INET 5323 case AF_INET: 5324 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5325 break; 5326 #endif 5327 default: 5328 break; 5329 } 5330 } 5331 } 5332 5333 /* 5334 * Add the address to the endpoint local address list There is nothing to be 5335 * done if we are bound to all addresses 5336 */ 5337 void 5338 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5339 { 5340 struct sctp_laddr *laddr; 5341 int fnd, error = 0; 5342 5343 fnd = 0; 5344 5345 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5346 /* You are already bound to all. You have it already */ 5347 return; 5348 } 5349 #ifdef INET6 5350 if (ifa->address.sa.sa_family == AF_INET6) { 5351 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5352 /* Can't bind a non-useable addr. */ 5353 return; 5354 } 5355 } 5356 #endif 5357 /* first, is it already present? */ 5358 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5359 if (laddr->ifa == ifa) { 5360 fnd = 1; 5361 break; 5362 } 5363 } 5364 5365 if (fnd == 0) { 5366 /* Not in the ep list */ 5367 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5368 if (error != 0) 5369 return; 5370 inp->laddr_count++; 5371 /* update inp_vflag flags */ 5372 switch (ifa->address.sa.sa_family) { 5373 #ifdef INET6 5374 case AF_INET6: 5375 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5376 break; 5377 #endif 5378 #ifdef INET 5379 case AF_INET: 5380 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5381 break; 5382 #endif 5383 default: 5384 break; 5385 } 5386 } 5387 return; 5388 } 5389 5390 5391 /* 5392 * select a new (hopefully reachable) destination net (should only be used 5393 * when we deleted an ep addr that is the only usable source address to reach 5394 * the destination net) 5395 */ 5396 static void 5397 sctp_select_primary_destination(struct sctp_tcb *stcb) 5398 { 5399 struct sctp_nets *net; 5400 5401 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5402 /* for now, we'll just pick the first reachable one we find */ 5403 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5404 continue; 5405 if (sctp_destination_is_reachable(stcb, 5406 (struct sockaddr *)&net->ro._l_addr)) { 5407 /* found a reachable destination */ 5408 stcb->asoc.primary_destination = net; 5409 } 5410 } 5411 /* I can't there from here! ...we're gonna die shortly... */ 5412 } 5413 5414 5415 /* 5416 * Delete the address from the endpoint local address list There is nothing 5417 * to be done if we are bound to all addresses 5418 */ 5419 void 5420 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5421 { 5422 struct sctp_laddr *laddr; 5423 int fnd; 5424 5425 fnd = 0; 5426 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5427 /* You are already bound to all. You have it already */ 5428 return; 5429 } 5430 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5431 if (laddr->ifa == ifa) { 5432 fnd = 1; 5433 break; 5434 } 5435 } 5436 if (fnd && (inp->laddr_count < 2)) { 5437 /* can't delete unless there are at LEAST 2 addresses */ 5438 return; 5439 } 5440 if (fnd) { 5441 /* 5442 * clean up any use of this address go through our 5443 * associations and clear any last_used_address that match 5444 * this one for each assoc, see if a new primary_destination 5445 * is needed 5446 */ 5447 struct sctp_tcb *stcb; 5448 5449 /* clean up "next_addr_touse" */ 5450 if (inp->next_addr_touse == laddr) 5451 /* delete this address */ 5452 inp->next_addr_touse = NULL; 5453 5454 /* clean up "last_used_address" */ 5455 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5456 struct sctp_nets *net; 5457 5458 SCTP_TCB_LOCK(stcb); 5459 if (stcb->asoc.last_used_address == laddr) 5460 /* delete this address */ 5461 stcb->asoc.last_used_address = NULL; 5462 /* 5463 * Now spin through all the nets and purge any ref 5464 * to laddr 5465 */ 5466 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5467 if (net->ro._s_addr && 5468 (net->ro._s_addr->ifa == laddr->ifa)) { 5469 /* Yep, purge src address selected */ 5470 sctp_rtentry_t *rt; 5471 5472 /* delete this address if cached */ 5473 rt = net->ro.ro_rt; 5474 if (rt != NULL) { 5475 RTFREE(rt); 5476 net->ro.ro_rt = NULL; 5477 } 5478 sctp_free_ifa(net->ro._s_addr); 5479 net->ro._s_addr = NULL; 5480 net->src_addr_selected = 0; 5481 } 5482 } 5483 SCTP_TCB_UNLOCK(stcb); 5484 } /* for each tcb */ 5485 /* remove it from the ep list */ 5486 sctp_remove_laddr(laddr); 5487 inp->laddr_count--; 5488 /* update inp_vflag flags */ 5489 sctp_update_ep_vflag(inp); 5490 } 5491 return; 5492 } 5493 5494 /* 5495 * Add the address to the TCB local address restricted list. 5496 * This is a "pending" address list (eg. addresses waiting for an 5497 * ASCONF-ACK response) and cannot be used as a valid source address. 5498 */ 5499 void 5500 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5501 { 5502 struct sctp_laddr *laddr; 5503 struct sctpladdr *list; 5504 5505 /* 5506 * Assumes TCB is locked.. and possibly the INP. May need to 5507 * confirm/fix that if we need it and is not the case. 5508 */ 5509 list = &stcb->asoc.sctp_restricted_addrs; 5510 5511 #ifdef INET6 5512 if (ifa->address.sa.sa_family == AF_INET6) { 5513 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5514 /* Can't bind a non-existent addr. */ 5515 return; 5516 } 5517 } 5518 #endif 5519 /* does the address already exist? */ 5520 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5521 if (laddr->ifa == ifa) { 5522 return; 5523 } 5524 } 5525 5526 /* add to the list */ 5527 (void)sctp_insert_laddr(list, ifa, 0); 5528 return; 5529 } 5530 5531 /* 5532 * insert an laddr entry with the given ifa for the desired list 5533 */ 5534 int 5535 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5536 { 5537 struct sctp_laddr *laddr; 5538 5539 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5540 if (laddr == NULL) { 5541 /* out of memory? */ 5542 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5543 return (EINVAL); 5544 } 5545 SCTP_INCR_LADDR_COUNT(); 5546 bzero(laddr, sizeof(*laddr)); 5547 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5548 laddr->ifa = ifa; 5549 laddr->action = act; 5550 atomic_add_int(&ifa->refcount, 1); 5551 /* insert it */ 5552 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5553 5554 return (0); 5555 } 5556 5557 /* 5558 * Remove an laddr entry from the local address list (on an assoc) 5559 */ 5560 void 5561 sctp_remove_laddr(struct sctp_laddr *laddr) 5562 { 5563 5564 /* remove from the list */ 5565 LIST_REMOVE(laddr, sctp_nxt_addr); 5566 sctp_free_ifa(laddr->ifa); 5567 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5568 SCTP_DECR_LADDR_COUNT(); 5569 } 5570 5571 /* 5572 * Remove a local address from the TCB local address restricted list 5573 */ 5574 void 5575 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5576 { 5577 struct sctp_inpcb *inp; 5578 struct sctp_laddr *laddr; 5579 5580 /* 5581 * This is called by asconf work. It is assumed that a) The TCB is 5582 * locked and b) The INP is locked. This is true in as much as I can 5583 * trace through the entry asconf code where I did these locks. 5584 * Again, the ASCONF code is a bit different in that it does lock 5585 * the INP during its work often times. This must be since we don't 5586 * want other proc's looking up things while what they are looking 5587 * up is changing :-D 5588 */ 5589 5590 inp = stcb->sctp_ep; 5591 /* if subset bound and don't allow ASCONF's, can't delete last */ 5592 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5593 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5594 if (stcb->sctp_ep->laddr_count < 2) { 5595 /* can't delete last address */ 5596 return; 5597 } 5598 } 5599 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5600 /* remove the address if it exists */ 5601 if (laddr->ifa == NULL) 5602 continue; 5603 if (laddr->ifa == ifa) { 5604 sctp_remove_laddr(laddr); 5605 return; 5606 } 5607 } 5608 5609 /* address not found! */ 5610 return; 5611 } 5612 5613 /* 5614 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5615 */ 5616 /* sysctl */ 5617 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5618 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5619 5620 5621 5622 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5623 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5624 int *sctp_cpuarry = NULL; 5625 void 5626 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5627 { 5628 /* Queue a packet to a processor for the specified core */ 5629 struct sctp_mcore_queue *qent; 5630 struct sctp_mcore_ctrl *wkq; 5631 int need_wake = 0; 5632 5633 if (sctp_mcore_workers == NULL) { 5634 /* Something went way bad during setup */ 5635 sctp_input_with_port(m, off, 0); 5636 return; 5637 } 5638 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5639 (sizeof(struct sctp_mcore_queue)), 5640 SCTP_M_MCORE); 5641 if (qent == NULL) { 5642 /* This is trouble */ 5643 sctp_input_with_port(m, off, 0); 5644 return; 5645 } 5646 qent->vn = curvnet; 5647 qent->m = m; 5648 qent->off = off; 5649 qent->v6 = 0; 5650 wkq = &sctp_mcore_workers[cpu_to_use]; 5651 SCTP_MCORE_QLOCK(wkq); 5652 5653 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5654 if (wkq->running == 0) { 5655 need_wake = 1; 5656 } 5657 SCTP_MCORE_QUNLOCK(wkq); 5658 if (need_wake) { 5659 wakeup(&wkq->running); 5660 } 5661 } 5662 5663 static void 5664 sctp_mcore_thread(void *arg) 5665 { 5666 5667 struct sctp_mcore_ctrl *wkq; 5668 struct sctp_mcore_queue *qent; 5669 5670 wkq = (struct sctp_mcore_ctrl *)arg; 5671 struct mbuf *m; 5672 int off, v6; 5673 5674 /* Wait for first tickle */ 5675 SCTP_MCORE_LOCK(wkq); 5676 wkq->running = 0; 5677 msleep(&wkq->running, 5678 &wkq->core_mtx, 5679 0, "wait for pkt", 0); 5680 SCTP_MCORE_UNLOCK(wkq); 5681 5682 /* Bind to our cpu */ 5683 thread_lock(curthread); 5684 sched_bind(curthread, wkq->cpuid); 5685 thread_unlock(curthread); 5686 5687 /* Now lets start working */ 5688 SCTP_MCORE_LOCK(wkq); 5689 /* Now grab lock and go */ 5690 for (;;) { 5691 SCTP_MCORE_QLOCK(wkq); 5692 skip_sleep: 5693 wkq->running = 1; 5694 qent = TAILQ_FIRST(&wkq->que); 5695 if (qent) { 5696 TAILQ_REMOVE(&wkq->que, qent, next); 5697 SCTP_MCORE_QUNLOCK(wkq); 5698 CURVNET_SET(qent->vn); 5699 m = qent->m; 5700 off = qent->off; 5701 v6 = qent->v6; 5702 SCTP_FREE(qent, SCTP_M_MCORE); 5703 if (v6 == 0) { 5704 sctp_input_with_port(m, off, 0); 5705 } else { 5706 SCTP_PRINTF("V6 not yet supported\n"); 5707 sctp_m_freem(m); 5708 } 5709 CURVNET_RESTORE(); 5710 SCTP_MCORE_QLOCK(wkq); 5711 } 5712 wkq->running = 0; 5713 if (!TAILQ_EMPTY(&wkq->que)) { 5714 goto skip_sleep; 5715 } 5716 SCTP_MCORE_QUNLOCK(wkq); 5717 msleep(&wkq->running, 5718 &wkq->core_mtx, 5719 0, "wait for pkt", 0); 5720 } 5721 } 5722 5723 static void 5724 sctp_startup_mcore_threads(void) 5725 { 5726 int i, cpu; 5727 5728 if (mp_ncpus == 1) 5729 return; 5730 5731 if (sctp_mcore_workers != NULL) { 5732 /* 5733 * Already been here in some previous vnet? 5734 */ 5735 return; 5736 } 5737 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5738 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5739 SCTP_M_MCORE); 5740 if (sctp_mcore_workers == NULL) { 5741 /* TSNH I hope */ 5742 return; 5743 } 5744 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5745 sizeof(struct sctp_mcore_ctrl))); 5746 /* Init the structures */ 5747 for (i = 0; i <= mp_maxid; i++) { 5748 TAILQ_INIT(&sctp_mcore_workers[i].que); 5749 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5750 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5751 sctp_mcore_workers[i].cpuid = i; 5752 } 5753 if (sctp_cpuarry == NULL) { 5754 SCTP_MALLOC(sctp_cpuarry, int *, 5755 (mp_ncpus * sizeof(int)), 5756 SCTP_M_MCORE); 5757 i = 0; 5758 CPU_FOREACH(cpu) { 5759 sctp_cpuarry[i] = cpu; 5760 i++; 5761 } 5762 } 5763 /* Now start them all */ 5764 CPU_FOREACH(cpu) { 5765 (void)kproc_create(sctp_mcore_thread, 5766 (void *)&sctp_mcore_workers[cpu], 5767 &sctp_mcore_workers[cpu].thread_proc, 5768 RFPROC, 5769 SCTP_KTHREAD_PAGES, 5770 SCTP_MCORE_NAME); 5771 5772 } 5773 } 5774 5775 #endif 5776 5777 void 5778 sctp_pcb_init() 5779 { 5780 /* 5781 * SCTP initialization for the PCB structures should be called by 5782 * the sctp_init() funciton. 5783 */ 5784 int i; 5785 struct timeval tv; 5786 5787 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5788 /* error I was called twice */ 5789 return; 5790 } 5791 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5792 5793 #if defined(SCTP_LOCAL_TRACE_BUF) 5794 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5795 #endif 5796 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5797 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5798 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5799 SCTP_M_MCORE); 5800 #endif 5801 (void)SCTP_GETTIME_TIMEVAL(&tv); 5802 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5803 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5804 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5805 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5806 #else 5807 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5808 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5809 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5810 #endif 5811 /* init the empty list of (All) Endpoints */ 5812 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5813 5814 5815 /* init the hash table of endpoints */ 5816 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5817 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5818 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5819 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5820 &SCTP_BASE_INFO(hashasocmark)); 5821 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5822 &SCTP_BASE_INFO(hashmark)); 5823 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5824 &SCTP_BASE_INFO(hashtcpmark)); 5825 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5826 5827 5828 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5829 &SCTP_BASE_INFO(hashvrfmark)); 5830 5831 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5832 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5833 /* init the zones */ 5834 /* 5835 * FIX ME: Should check for NULL returns, but if it does fail we are 5836 * doomed to panic anyways... add later maybe. 5837 */ 5838 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5839 sizeof(struct sctp_inpcb), maxsockets); 5840 5841 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5842 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5843 5844 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5845 sizeof(struct sctp_laddr), 5846 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5847 5848 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5849 sizeof(struct sctp_nets), 5850 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5851 5852 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5853 sizeof(struct sctp_tmit_chunk), 5854 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5855 5856 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5857 sizeof(struct sctp_queued_to_read), 5858 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5859 5860 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5861 sizeof(struct sctp_stream_queue_pending), 5862 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5863 5864 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5865 sizeof(struct sctp_asconf), 5866 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5867 5868 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5869 sizeof(struct sctp_asconf_ack), 5870 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5871 5872 5873 /* Master Lock INIT for info structure */ 5874 SCTP_INP_INFO_LOCK_INIT(); 5875 SCTP_STATLOG_INIT_LOCK(); 5876 5877 SCTP_IPI_COUNT_INIT(); 5878 SCTP_IPI_ADDR_INIT(); 5879 #ifdef SCTP_PACKET_LOGGING 5880 SCTP_IP_PKTLOG_INIT(); 5881 #endif 5882 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5883 5884 SCTP_WQ_ADDR_INIT(); 5885 /* not sure if we need all the counts */ 5886 SCTP_BASE_INFO(ipi_count_ep) = 0; 5887 /* assoc/tcb zone info */ 5888 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5889 /* local addrlist zone info */ 5890 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5891 /* remote addrlist zone info */ 5892 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5893 /* chunk info */ 5894 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5895 5896 /* socket queue zone info */ 5897 SCTP_BASE_INFO(ipi_count_readq) = 0; 5898 5899 /* stream out queue cont */ 5900 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5901 5902 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5903 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5904 5905 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5906 5907 /* Init the TIMEWAIT list */ 5908 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5909 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5910 } 5911 sctp_startup_iterator(); 5912 5913 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5914 sctp_startup_mcore_threads(); 5915 #endif 5916 5917 /* 5918 * INIT the default VRF which for BSD is the only one, other O/S's 5919 * may have more. But initially they must start with one and then 5920 * add the VRF's as addresses are added. 5921 */ 5922 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5923 } 5924 5925 /* 5926 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5927 */ 5928 void 5929 sctp_pcb_finish(void) 5930 { 5931 struct sctp_vrflist *vrf_bucket; 5932 struct sctp_vrf *vrf, *nvrf; 5933 struct sctp_ifn *ifn, *nifn; 5934 struct sctp_ifa *ifa, *nifa; 5935 struct sctpvtaghead *chain; 5936 struct sctp_tagblock *twait_block, *prev_twait_block; 5937 struct sctp_laddr *wi, *nwi; 5938 int i; 5939 struct sctp_iterator *it, *nit; 5940 5941 /* 5942 * In FreeBSD the iterator thread never exits but we do clean up. 5943 * The only way FreeBSD reaches here is if we have VRF's but we 5944 * still add the ifdef to make it compile on old versions. 5945 */ 5946 SCTP_IPI_ITERATOR_WQ_LOCK(); 5947 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5948 if (it->vn != curvnet) { 5949 continue; 5950 } 5951 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5952 if (it->function_atend != NULL) { 5953 (*it->function_atend) (it->pointer, it->val); 5954 } 5955 SCTP_FREE(it, SCTP_M_ITER); 5956 } 5957 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5958 SCTP_ITERATOR_LOCK(); 5959 if ((sctp_it_ctl.cur_it) && 5960 (sctp_it_ctl.cur_it->vn == curvnet)) { 5961 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5962 } 5963 SCTP_ITERATOR_UNLOCK(); 5964 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5965 SCTP_WQ_ADDR_LOCK(); 5966 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5967 LIST_REMOVE(wi, sctp_nxt_addr); 5968 SCTP_DECR_LADDR_COUNT(); 5969 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5970 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5971 } 5972 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5973 } 5974 SCTP_WQ_ADDR_UNLOCK(); 5975 5976 /* 5977 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5978 * destroyed first). 5979 */ 5980 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5981 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5982 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5983 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5984 /* free the ifa */ 5985 LIST_REMOVE(ifa, next_bucket); 5986 LIST_REMOVE(ifa, next_ifa); 5987 SCTP_FREE(ifa, SCTP_M_IFA); 5988 } 5989 /* free the ifn */ 5990 LIST_REMOVE(ifn, next_bucket); 5991 LIST_REMOVE(ifn, next_ifn); 5992 SCTP_FREE(ifn, SCTP_M_IFN); 5993 } 5994 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5995 /* free the vrf */ 5996 LIST_REMOVE(vrf, next_vrf); 5997 SCTP_FREE(vrf, SCTP_M_VRF); 5998 } 5999 /* free the vrf hashes */ 6000 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6001 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6002 6003 /* 6004 * free the TIMEWAIT list elements malloc'd in the function 6005 * sctp_add_vtag_to_timewait()... 6006 */ 6007 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6008 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6009 if (!LIST_EMPTY(chain)) { 6010 prev_twait_block = NULL; 6011 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6012 if (prev_twait_block) { 6013 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6014 } 6015 prev_twait_block = twait_block; 6016 } 6017 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6018 } 6019 } 6020 6021 /* free the locks and mutexes */ 6022 #ifdef SCTP_PACKET_LOGGING 6023 SCTP_IP_PKTLOG_DESTROY(); 6024 #endif 6025 SCTP_IPI_ADDR_DESTROY(); 6026 SCTP_STATLOG_DESTROY(); 6027 SCTP_INP_INFO_LOCK_DESTROY(); 6028 6029 SCTP_WQ_ADDR_DESTROY(); 6030 6031 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6032 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6033 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6034 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6035 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6036 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6037 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6038 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6039 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6040 /* Get rid of other stuff to */ 6041 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6042 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6043 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6044 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6045 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6046 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6047 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6048 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6049 #endif 6050 } 6051 6052 6053 int 6054 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6055 int offset, int limit, 6056 struct sockaddr *src, struct sockaddr *dst, 6057 struct sockaddr *altsa) 6058 { 6059 /* 6060 * grub through the INIT pulling addresses and loading them to the 6061 * nets structure in the asoc. The from address in the mbuf should 6062 * also be loaded (if it is not already). This routine can be called 6063 * with either INIT or INIT-ACK's as long as the m points to the IP 6064 * packet and the offset points to the beginning of the parameters. 6065 */ 6066 struct sctp_inpcb *inp; 6067 struct sctp_nets *net, *nnet, *net_tmp; 6068 struct sctp_paramhdr *phdr, parm_buf; 6069 struct sctp_tcb *stcb_tmp; 6070 uint16_t ptype, plen; 6071 struct sockaddr *sa; 6072 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6073 struct sctp_auth_random *p_random = NULL; 6074 uint16_t random_len = 0; 6075 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6076 struct sctp_auth_hmac_algo *hmacs = NULL; 6077 uint16_t hmacs_len = 0; 6078 uint8_t saw_asconf = 0; 6079 uint8_t saw_asconf_ack = 0; 6080 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6081 struct sctp_auth_chunk_list *chunks = NULL; 6082 uint16_t num_chunks = 0; 6083 sctp_key_t *new_key; 6084 uint32_t keylen; 6085 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6086 uint8_t peer_supports_ecn; 6087 uint8_t peer_supports_prsctp; 6088 uint8_t peer_supports_auth; 6089 uint8_t peer_supports_asconf; 6090 uint8_t peer_supports_asconf_ack; 6091 uint8_t peer_supports_reconfig; 6092 uint8_t peer_supports_nrsack; 6093 uint8_t peer_supports_pktdrop; 6094 6095 #ifdef INET 6096 struct sockaddr_in sin; 6097 6098 #endif 6099 #ifdef INET6 6100 struct sockaddr_in6 sin6; 6101 6102 #endif 6103 6104 /* First get the destination address setup too. */ 6105 #ifdef INET 6106 memset(&sin, 0, sizeof(sin)); 6107 sin.sin_family = AF_INET; 6108 sin.sin_len = sizeof(sin); 6109 sin.sin_port = stcb->rport; 6110 #endif 6111 #ifdef INET6 6112 memset(&sin6, 0, sizeof(sin6)); 6113 sin6.sin6_family = AF_INET6; 6114 sin6.sin6_len = sizeof(struct sockaddr_in6); 6115 sin6.sin6_port = stcb->rport; 6116 #endif 6117 if (altsa) { 6118 sa = altsa; 6119 } else { 6120 sa = src; 6121 } 6122 peer_supports_ecn = 0; 6123 peer_supports_prsctp = 0; 6124 peer_supports_auth = 0; 6125 peer_supports_asconf = 0; 6126 peer_supports_reconfig = 0; 6127 peer_supports_nrsack = 0; 6128 peer_supports_pktdrop = 0; 6129 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6130 /* mark all addresses that we have currently on the list */ 6131 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6132 } 6133 /* does the source address already exist? if so skip it */ 6134 inp = stcb->sctp_ep; 6135 atomic_add_int(&stcb->asoc.refcnt, 1); 6136 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6137 atomic_add_int(&stcb->asoc.refcnt, -1); 6138 6139 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6140 /* we must add the source address */ 6141 /* no scope set here since we have a tcb already. */ 6142 switch (sa->sa_family) { 6143 #ifdef INET 6144 case AF_INET: 6145 if (stcb->asoc.scope.ipv4_addr_legal) { 6146 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6147 return (-1); 6148 } 6149 } 6150 break; 6151 #endif 6152 #ifdef INET6 6153 case AF_INET6: 6154 if (stcb->asoc.scope.ipv6_addr_legal) { 6155 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6156 return (-2); 6157 } 6158 } 6159 break; 6160 #endif 6161 default: 6162 break; 6163 } 6164 } else { 6165 if (net_tmp != NULL && stcb_tmp == stcb) { 6166 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6167 } else if (stcb_tmp != stcb) { 6168 /* It belongs to another association? */ 6169 if (stcb_tmp) 6170 SCTP_TCB_UNLOCK(stcb_tmp); 6171 return (-3); 6172 } 6173 } 6174 if (stcb->asoc.state == 0) { 6175 /* the assoc was freed? */ 6176 return (-4); 6177 } 6178 /* now we must go through each of the params. */ 6179 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6180 while (phdr) { 6181 ptype = ntohs(phdr->param_type); 6182 plen = ntohs(phdr->param_length); 6183 /* 6184 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6185 * (uint32_t)ptype, (int)plen); 6186 */ 6187 if (offset + plen > limit) { 6188 break; 6189 } 6190 if (plen == 0) { 6191 break; 6192 } 6193 #ifdef INET 6194 if (ptype == SCTP_IPV4_ADDRESS) { 6195 if (stcb->asoc.scope.ipv4_addr_legal) { 6196 struct sctp_ipv4addr_param *p4, p4_buf; 6197 6198 /* ok get the v4 address and check/add */ 6199 phdr = sctp_get_next_param(m, offset, 6200 (struct sctp_paramhdr *)&p4_buf, 6201 sizeof(p4_buf)); 6202 if (plen != sizeof(struct sctp_ipv4addr_param) || 6203 phdr == NULL) { 6204 return (-5); 6205 } 6206 p4 = (struct sctp_ipv4addr_param *)phdr; 6207 sin.sin_addr.s_addr = p4->addr; 6208 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6209 /* Skip multi-cast addresses */ 6210 goto next_param; 6211 } 6212 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6213 (sin.sin_addr.s_addr == INADDR_ANY)) { 6214 goto next_param; 6215 } 6216 sa = (struct sockaddr *)&sin; 6217 inp = stcb->sctp_ep; 6218 atomic_add_int(&stcb->asoc.refcnt, 1); 6219 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6220 dst, stcb); 6221 atomic_add_int(&stcb->asoc.refcnt, -1); 6222 6223 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6224 inp == NULL) { 6225 /* we must add the source address */ 6226 /* 6227 * no scope set since we have a tcb 6228 * already 6229 */ 6230 6231 /* 6232 * we must validate the state again 6233 * here 6234 */ 6235 add_it_now: 6236 if (stcb->asoc.state == 0) { 6237 /* the assoc was freed? */ 6238 return (-7); 6239 } 6240 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6241 return (-8); 6242 } 6243 } else if (stcb_tmp == stcb) { 6244 if (stcb->asoc.state == 0) { 6245 /* the assoc was freed? */ 6246 return (-10); 6247 } 6248 if (net != NULL) { 6249 /* clear flag */ 6250 net->dest_state &= 6251 ~SCTP_ADDR_NOT_IN_ASSOC; 6252 } 6253 } else { 6254 /* 6255 * strange, address is in another 6256 * assoc? straighten out locks. 6257 */ 6258 if (stcb_tmp) { 6259 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6260 /* 6261 * in setup state we 6262 * abort this guy 6263 */ 6264 sctp_abort_an_association(stcb_tmp->sctp_ep, 6265 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6266 goto add_it_now; 6267 } 6268 SCTP_TCB_UNLOCK(stcb_tmp); 6269 } 6270 if (stcb->asoc.state == 0) { 6271 /* the assoc was freed? */ 6272 return (-12); 6273 } 6274 return (-13); 6275 } 6276 } 6277 } else 6278 #endif 6279 #ifdef INET6 6280 if (ptype == SCTP_IPV6_ADDRESS) { 6281 if (stcb->asoc.scope.ipv6_addr_legal) { 6282 /* ok get the v6 address and check/add */ 6283 struct sctp_ipv6addr_param *p6, p6_buf; 6284 6285 phdr = sctp_get_next_param(m, offset, 6286 (struct sctp_paramhdr *)&p6_buf, 6287 sizeof(p6_buf)); 6288 if (plen != sizeof(struct sctp_ipv6addr_param) || 6289 phdr == NULL) { 6290 return (-14); 6291 } 6292 p6 = (struct sctp_ipv6addr_param *)phdr; 6293 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6294 sizeof(p6->addr)); 6295 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6296 /* Skip multi-cast addresses */ 6297 goto next_param; 6298 } 6299 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6300 /* 6301 * Link local make no sense without 6302 * scope 6303 */ 6304 goto next_param; 6305 } 6306 sa = (struct sockaddr *)&sin6; 6307 inp = stcb->sctp_ep; 6308 atomic_add_int(&stcb->asoc.refcnt, 1); 6309 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6310 dst, stcb); 6311 atomic_add_int(&stcb->asoc.refcnt, -1); 6312 if (stcb_tmp == NULL && 6313 (inp == stcb->sctp_ep || inp == NULL)) { 6314 /* 6315 * we must validate the state again 6316 * here 6317 */ 6318 add_it_now6: 6319 if (stcb->asoc.state == 0) { 6320 /* the assoc was freed? */ 6321 return (-16); 6322 } 6323 /* 6324 * we must add the address, no scope 6325 * set 6326 */ 6327 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6328 return (-17); 6329 } 6330 } else if (stcb_tmp == stcb) { 6331 /* 6332 * we must validate the state again 6333 * here 6334 */ 6335 if (stcb->asoc.state == 0) { 6336 /* the assoc was freed? */ 6337 return (-19); 6338 } 6339 if (net != NULL) { 6340 /* clear flag */ 6341 net->dest_state &= 6342 ~SCTP_ADDR_NOT_IN_ASSOC; 6343 } 6344 } else { 6345 /* 6346 * strange, address is in another 6347 * assoc? straighten out locks. 6348 */ 6349 if (stcb_tmp) 6350 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6351 /* 6352 * in setup state we 6353 * abort this guy 6354 */ 6355 sctp_abort_an_association(stcb_tmp->sctp_ep, 6356 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6357 goto add_it_now6; 6358 } 6359 SCTP_TCB_UNLOCK(stcb_tmp); 6360 6361 if (stcb->asoc.state == 0) { 6362 /* the assoc was freed? */ 6363 return (-21); 6364 } 6365 return (-22); 6366 } 6367 } 6368 } else 6369 #endif 6370 if (ptype == SCTP_ECN_CAPABLE) { 6371 peer_supports_ecn = 1; 6372 } else if (ptype == SCTP_ULP_ADAPTATION) { 6373 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6374 struct sctp_adaptation_layer_indication ai, 6375 *aip; 6376 6377 phdr = sctp_get_next_param(m, offset, 6378 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6379 aip = (struct sctp_adaptation_layer_indication *)phdr; 6380 if (aip) { 6381 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6382 stcb->asoc.adaptation_needed = 1; 6383 } 6384 } 6385 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6386 struct sctp_asconf_addr_param lstore, *fee; 6387 int lptype; 6388 struct sockaddr *lsa = NULL; 6389 6390 #ifdef INET 6391 struct sctp_asconf_addrv4_param *fii; 6392 6393 #endif 6394 6395 if (stcb->asoc.asconf_supported == 0) { 6396 return (-100); 6397 } 6398 if (plen > sizeof(lstore)) { 6399 return (-23); 6400 } 6401 phdr = sctp_get_next_param(m, offset, 6402 (struct sctp_paramhdr *)&lstore, 6403 min(plen, sizeof(lstore))); 6404 if (phdr == NULL) { 6405 return (-24); 6406 } 6407 fee = (struct sctp_asconf_addr_param *)phdr; 6408 lptype = ntohs(fee->addrp.ph.param_type); 6409 switch (lptype) { 6410 #ifdef INET 6411 case SCTP_IPV4_ADDRESS: 6412 if (plen != 6413 sizeof(struct sctp_asconf_addrv4_param)) { 6414 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6415 (int)sizeof(struct sctp_asconf_addrv4_param), 6416 plen); 6417 } else { 6418 fii = (struct sctp_asconf_addrv4_param *)fee; 6419 sin.sin_addr.s_addr = fii->addrp.addr; 6420 lsa = (struct sockaddr *)&sin; 6421 } 6422 break; 6423 #endif 6424 #ifdef INET6 6425 case SCTP_IPV6_ADDRESS: 6426 if (plen != 6427 sizeof(struct sctp_asconf_addr_param)) { 6428 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6429 (int)sizeof(struct sctp_asconf_addr_param), 6430 plen); 6431 } else { 6432 memcpy(sin6.sin6_addr.s6_addr, 6433 fee->addrp.addr, 6434 sizeof(fee->addrp.addr)); 6435 lsa = (struct sockaddr *)&sin6; 6436 } 6437 break; 6438 #endif 6439 default: 6440 break; 6441 } 6442 if (lsa) { 6443 (void)sctp_set_primary_addr(stcb, sa, NULL); 6444 } 6445 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6446 stcb->asoc.peer_supports_nat = 1; 6447 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6448 /* Peer supports pr-sctp */ 6449 peer_supports_prsctp = 1; 6450 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6451 /* A supported extension chunk */ 6452 struct sctp_supported_chunk_types_param *pr_supported; 6453 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6454 int num_ent, i; 6455 6456 phdr = sctp_get_next_param(m, offset, 6457 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6458 if (phdr == NULL) { 6459 return (-25); 6460 } 6461 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6462 num_ent = plen - sizeof(struct sctp_paramhdr); 6463 for (i = 0; i < num_ent; i++) { 6464 switch (pr_supported->chunk_types[i]) { 6465 case SCTP_ASCONF: 6466 peer_supports_asconf = 1; 6467 case SCTP_ASCONF_ACK: 6468 peer_supports_asconf_ack = 1; 6469 break; 6470 case SCTP_FORWARD_CUM_TSN: 6471 peer_supports_prsctp = 1; 6472 break; 6473 case SCTP_PACKET_DROPPED: 6474 peer_supports_pktdrop = 1; 6475 break; 6476 case SCTP_NR_SELECTIVE_ACK: 6477 peer_supports_nrsack = 1; 6478 break; 6479 case SCTP_STREAM_RESET: 6480 peer_supports_reconfig = 1; 6481 break; 6482 case SCTP_AUTHENTICATION: 6483 peer_supports_auth = 1; 6484 break; 6485 default: 6486 /* one I have not learned yet */ 6487 break; 6488 6489 } 6490 } 6491 } else if (ptype == SCTP_RANDOM) { 6492 if (plen > sizeof(random_store)) 6493 break; 6494 if (got_random) { 6495 /* already processed a RANDOM */ 6496 goto next_param; 6497 } 6498 phdr = sctp_get_next_param(m, offset, 6499 (struct sctp_paramhdr *)random_store, 6500 min(sizeof(random_store), plen)); 6501 if (phdr == NULL) 6502 return (-26); 6503 p_random = (struct sctp_auth_random *)phdr; 6504 random_len = plen - sizeof(*p_random); 6505 /* enforce the random length */ 6506 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6507 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6508 return (-27); 6509 } 6510 got_random = 1; 6511 } else if (ptype == SCTP_HMAC_LIST) { 6512 uint16_t num_hmacs; 6513 uint16_t i; 6514 6515 if (plen > sizeof(hmacs_store)) 6516 break; 6517 if (got_hmacs) { 6518 /* already processed a HMAC list */ 6519 goto next_param; 6520 } 6521 phdr = sctp_get_next_param(m, offset, 6522 (struct sctp_paramhdr *)hmacs_store, 6523 min(plen, sizeof(hmacs_store))); 6524 if (phdr == NULL) 6525 return (-28); 6526 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6527 hmacs_len = plen - sizeof(*hmacs); 6528 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6529 /* validate the hmac list */ 6530 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6531 return (-29); 6532 } 6533 if (stcb->asoc.peer_hmacs != NULL) 6534 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6535 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6536 if (stcb->asoc.peer_hmacs != NULL) { 6537 for (i = 0; i < num_hmacs; i++) { 6538 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6539 ntohs(hmacs->hmac_ids[i])); 6540 } 6541 } 6542 got_hmacs = 1; 6543 } else if (ptype == SCTP_CHUNK_LIST) { 6544 int i; 6545 6546 if (plen > sizeof(chunks_store)) 6547 break; 6548 if (got_chklist) { 6549 /* already processed a Chunks list */ 6550 goto next_param; 6551 } 6552 phdr = sctp_get_next_param(m, offset, 6553 (struct sctp_paramhdr *)chunks_store, 6554 min(plen, sizeof(chunks_store))); 6555 if (phdr == NULL) 6556 return (-30); 6557 chunks = (struct sctp_auth_chunk_list *)phdr; 6558 num_chunks = plen - sizeof(*chunks); 6559 if (stcb->asoc.peer_auth_chunks != NULL) 6560 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6561 else 6562 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6563 for (i = 0; i < num_chunks; i++) { 6564 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6565 stcb->asoc.peer_auth_chunks); 6566 /* record asconf/asconf-ack if listed */ 6567 if (chunks->chunk_types[i] == SCTP_ASCONF) 6568 saw_asconf = 1; 6569 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6570 saw_asconf_ack = 1; 6571 6572 } 6573 got_chklist = 1; 6574 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6575 (ptype == SCTP_STATE_COOKIE) || 6576 (ptype == SCTP_UNRECOG_PARAM) || 6577 (ptype == SCTP_COOKIE_PRESERVE) || 6578 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6579 (ptype == SCTP_ADD_IP_ADDRESS) || 6580 (ptype == SCTP_DEL_IP_ADDRESS) || 6581 (ptype == SCTP_ERROR_CAUSE_IND) || 6582 (ptype == SCTP_SUCCESS_REPORT)) { 6583 /* don't care */ ; 6584 } else { 6585 if ((ptype & 0x8000) == 0x0000) { 6586 /* 6587 * must stop processing the rest of the 6588 * param's. Any report bits were handled 6589 * with the call to 6590 * sctp_arethere_unrecognized_parameters() 6591 * when the INIT or INIT-ACK was first seen. 6592 */ 6593 break; 6594 } 6595 } 6596 6597 next_param: 6598 offset += SCTP_SIZE32(plen); 6599 if (offset >= limit) { 6600 break; 6601 } 6602 phdr = sctp_get_next_param(m, offset, &parm_buf, 6603 sizeof(parm_buf)); 6604 } 6605 /* Now check to see if we need to purge any addresses */ 6606 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6607 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6608 SCTP_ADDR_NOT_IN_ASSOC) { 6609 /* This address has been removed from the asoc */ 6610 /* remove and free it */ 6611 stcb->asoc.numnets--; 6612 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6613 sctp_free_remote_addr(net); 6614 if (net == stcb->asoc.primary_destination) { 6615 stcb->asoc.primary_destination = NULL; 6616 sctp_select_primary_destination(stcb); 6617 } 6618 } 6619 } 6620 if ((stcb->asoc.ecn_supported == 1) && 6621 (peer_supports_ecn == 0)) { 6622 stcb->asoc.ecn_supported = 0; 6623 } 6624 if ((stcb->asoc.prsctp_supported == 1) && 6625 (peer_supports_prsctp == 0)) { 6626 stcb->asoc.prsctp_supported = 0; 6627 } 6628 if ((stcb->asoc.auth_supported == 1) && 6629 ((peer_supports_auth == 0) || 6630 (got_random == 0) || (got_hmacs == 0))) { 6631 stcb->asoc.auth_supported = 0; 6632 } 6633 if ((stcb->asoc.asconf_supported == 1) && 6634 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6635 (stcb->asoc.auth_supported == 0) || 6636 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6637 stcb->asoc.asconf_supported = 0; 6638 } 6639 if ((stcb->asoc.reconfig_supported == 1) && 6640 (peer_supports_reconfig == 0)) { 6641 stcb->asoc.reconfig_supported = 0; 6642 } 6643 if ((stcb->asoc.nrsack_supported == 1) && 6644 (peer_supports_nrsack == 0)) { 6645 stcb->asoc.nrsack_supported = 0; 6646 } 6647 if ((stcb->asoc.pktdrop_supported == 1) && 6648 (peer_supports_pktdrop == 0)) { 6649 stcb->asoc.pktdrop_supported = 0; 6650 } 6651 /* validate authentication required parameters */ 6652 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6653 /* peer does not support auth but sent a chunks list? */ 6654 return (-31); 6655 } 6656 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6657 /* peer supports asconf but not auth? */ 6658 return (-32); 6659 } else if ((peer_supports_asconf == 1) && 6660 (peer_supports_auth == 1) && 6661 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6662 return (-33); 6663 } 6664 /* concatenate the full random key */ 6665 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6666 if (chunks != NULL) { 6667 keylen += sizeof(*chunks) + num_chunks; 6668 } 6669 new_key = sctp_alloc_key(keylen); 6670 if (new_key != NULL) { 6671 /* copy in the RANDOM */ 6672 if (p_random != NULL) { 6673 keylen = sizeof(*p_random) + random_len; 6674 bcopy(p_random, new_key->key, keylen); 6675 } 6676 /* append in the AUTH chunks */ 6677 if (chunks != NULL) { 6678 bcopy(chunks, new_key->key + keylen, 6679 sizeof(*chunks) + num_chunks); 6680 keylen += sizeof(*chunks) + num_chunks; 6681 } 6682 /* append in the HMACs */ 6683 if (hmacs != NULL) { 6684 bcopy(hmacs, new_key->key + keylen, 6685 sizeof(*hmacs) + hmacs_len); 6686 } 6687 } else { 6688 /* failed to get memory for the key */ 6689 return (-34); 6690 } 6691 if (stcb->asoc.authinfo.peer_random != NULL) 6692 sctp_free_key(stcb->asoc.authinfo.peer_random); 6693 stcb->asoc.authinfo.peer_random = new_key; 6694 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6695 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6696 6697 return (0); 6698 } 6699 6700 int 6701 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6702 struct sctp_nets *net) 6703 { 6704 /* make sure the requested primary address exists in the assoc */ 6705 if (net == NULL && sa) 6706 net = sctp_findnet(stcb, sa); 6707 6708 if (net == NULL) { 6709 /* didn't find the requested primary address! */ 6710 return (-1); 6711 } else { 6712 /* set the primary address */ 6713 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6714 /* Must be confirmed, so queue to set */ 6715 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6716 return (0); 6717 } 6718 stcb->asoc.primary_destination = net; 6719 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6720 sctp_free_remote_addr(stcb->asoc.alternate); 6721 stcb->asoc.alternate = NULL; 6722 } 6723 net = TAILQ_FIRST(&stcb->asoc.nets); 6724 if (net != stcb->asoc.primary_destination) { 6725 /* 6726 * first one on the list is NOT the primary 6727 * sctp_cmpaddr() is much more efficient if the 6728 * primary is the first on the list, make it so. 6729 */ 6730 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6731 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6732 } 6733 return (0); 6734 } 6735 } 6736 6737 int 6738 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6739 { 6740 /* 6741 * This function serves two purposes. It will see if a TAG can be 6742 * re-used and return 1 for yes it is ok and 0 for don't use that 6743 * tag. A secondary function it will do is purge out old tags that 6744 * can be removed. 6745 */ 6746 struct sctpvtaghead *chain; 6747 struct sctp_tagblock *twait_block; 6748 struct sctpasochead *head; 6749 struct sctp_tcb *stcb; 6750 int i; 6751 6752 SCTP_INP_INFO_RLOCK(); 6753 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6754 SCTP_BASE_INFO(hashasocmark))]; 6755 if (head == NULL) { 6756 /* invalid vtag */ 6757 goto skip_vtag_check; 6758 } 6759 LIST_FOREACH(stcb, head, sctp_asocs) { 6760 /* 6761 * We choose not to lock anything here. TCB's can't be 6762 * removed since we have the read lock, so they can't be 6763 * freed on us, same thing for the INP. I may be wrong with 6764 * this assumption, but we will go with it for now :-) 6765 */ 6766 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6767 continue; 6768 } 6769 if (stcb->asoc.my_vtag == tag) { 6770 /* candidate */ 6771 if (stcb->rport != rport) { 6772 continue; 6773 } 6774 if (stcb->sctp_ep->sctp_lport != lport) { 6775 continue; 6776 } 6777 /* Its a used tag set */ 6778 SCTP_INP_INFO_RUNLOCK(); 6779 return (0); 6780 } 6781 } 6782 skip_vtag_check: 6783 6784 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6785 /* Now what about timed wait ? */ 6786 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6787 /* 6788 * Block(s) are present, lets see if we have this tag in the 6789 * list 6790 */ 6791 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6792 if (twait_block->vtag_block[i].v_tag == 0) { 6793 /* not used */ 6794 continue; 6795 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6796 now->tv_sec) { 6797 /* Audit expires this guy */ 6798 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6799 twait_block->vtag_block[i].v_tag = 0; 6800 twait_block->vtag_block[i].lport = 0; 6801 twait_block->vtag_block[i].rport = 0; 6802 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6803 (twait_block->vtag_block[i].lport == lport) && 6804 (twait_block->vtag_block[i].rport == rport)) { 6805 /* Bad tag, sorry :< */ 6806 SCTP_INP_INFO_RUNLOCK(); 6807 return (0); 6808 } 6809 } 6810 } 6811 SCTP_INP_INFO_RUNLOCK(); 6812 return (1); 6813 } 6814 6815 static void 6816 sctp_drain_mbufs(struct sctp_tcb *stcb) 6817 { 6818 /* 6819 * We must hunt this association for MBUF's past the cumack (i.e. 6820 * out of order data that we can renege on). 6821 */ 6822 struct sctp_association *asoc; 6823 struct sctp_tmit_chunk *chk, *nchk; 6824 uint32_t cumulative_tsn_p1; 6825 struct sctp_queued_to_read *ctl, *nctl; 6826 int cnt, strmat; 6827 uint32_t gap, i; 6828 int fnd = 0; 6829 6830 /* We look for anything larger than the cum-ack + 1 */ 6831 6832 asoc = &stcb->asoc; 6833 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6834 /* none we can reneg on. */ 6835 return; 6836 } 6837 SCTP_STAT_INCR(sctps_protocol_drains_done); 6838 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6839 cnt = 0; 6840 /* First look in the re-assembly queue */ 6841 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6842 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6843 /* Yep it is above cum-ack */ 6844 cnt++; 6845 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6846 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6847 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6848 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6849 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6850 if (chk->data) { 6851 sctp_m_freem(chk->data); 6852 chk->data = NULL; 6853 } 6854 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6855 } 6856 } 6857 /* Ok that was fun, now we will drain all the inbound streams? */ 6858 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6859 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6860 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6861 /* Yep it is above cum-ack */ 6862 cnt++; 6863 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6864 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6865 sctp_ucount_decr(asoc->cnt_on_all_streams); 6866 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6867 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6868 if (ctl->data) { 6869 sctp_m_freem(ctl->data); 6870 ctl->data = NULL; 6871 } 6872 sctp_free_remote_addr(ctl->whoFrom); 6873 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6874 SCTP_DECR_READQ_COUNT(); 6875 } 6876 } 6877 } 6878 if (cnt) { 6879 /* We must back down to see what the new highest is */ 6880 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6881 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6882 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6883 asoc->highest_tsn_inside_map = i; 6884 fnd = 1; 6885 break; 6886 } 6887 } 6888 if (!fnd) { 6889 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6890 } 6891 /* 6892 * Question, should we go through the delivery queue? The 6893 * only reason things are on here is the app not reading OR 6894 * a p-d-api up. An attacker COULD send enough in to 6895 * initiate the PD-API and then send a bunch of stuff to 6896 * other streams... these would wind up on the delivery 6897 * queue.. and then we would not get to them. But in order 6898 * to do this I then have to back-track and un-deliver 6899 * sequence numbers in streams.. el-yucko. I think for now 6900 * we will NOT look at the delivery queue and leave it to be 6901 * something to consider later. An alternative would be to 6902 * abort the P-D-API with a notification and then deliver 6903 * the data.... Or another method might be to keep track of 6904 * how many times the situation occurs and if we see a 6905 * possible attack underway just abort the association. 6906 */ 6907 #ifdef SCTP_DEBUG 6908 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6909 #endif 6910 /* 6911 * Now do we need to find a new 6912 * asoc->highest_tsn_inside_map? 6913 */ 6914 asoc->last_revoke_count = cnt; 6915 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6916 /* sa_ignore NO_NULL_CHK */ 6917 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6918 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6919 } 6920 /* 6921 * Another issue, in un-setting the TSN's in the mapping array we 6922 * DID NOT adjust the highest_tsn marker. This will cause one of 6923 * two things to occur. It may cause us to do extra work in checking 6924 * for our mapping array movement. More importantly it may cause us 6925 * to SACK every datagram. This may not be a bad thing though since 6926 * we will recover once we get our cum-ack above and all this stuff 6927 * we dumped recovered. 6928 */ 6929 } 6930 6931 void 6932 sctp_drain() 6933 { 6934 /* 6935 * We must walk the PCB lists for ALL associations here. The system 6936 * is LOW on MBUF's and needs help. This is where reneging will 6937 * occur. We really hope this does NOT happen! 6938 */ 6939 VNET_ITERATOR_DECL(vnet_iter); 6940 VNET_LIST_RLOCK_NOSLEEP(); 6941 VNET_FOREACH(vnet_iter) { 6942 CURVNET_SET(vnet_iter); 6943 struct sctp_inpcb *inp; 6944 struct sctp_tcb *stcb; 6945 6946 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6947 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6948 #ifdef VIMAGE 6949 continue; 6950 #else 6951 return; 6952 #endif 6953 } 6954 SCTP_INP_INFO_RLOCK(); 6955 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6956 /* For each endpoint */ 6957 SCTP_INP_RLOCK(inp); 6958 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6959 /* For each association */ 6960 SCTP_TCB_LOCK(stcb); 6961 sctp_drain_mbufs(stcb); 6962 SCTP_TCB_UNLOCK(stcb); 6963 } 6964 SCTP_INP_RUNLOCK(inp); 6965 } 6966 SCTP_INP_INFO_RUNLOCK(); 6967 CURVNET_RESTORE(); 6968 } 6969 VNET_LIST_RUNLOCK_NOSLEEP(); 6970 } 6971 6972 /* 6973 * start a new iterator 6974 * iterates through all endpoints and associations based on the pcb_state 6975 * flags and asoc_state. "af" (mandatory) is executed for all matching 6976 * assocs and "ef" (optional) is executed when the iterator completes. 6977 * "inpf" (optional) is executed for each new endpoint as it is being 6978 * iterated through. inpe (optional) is called when the inp completes 6979 * its way through all the stcbs. 6980 */ 6981 int 6982 sctp_initiate_iterator(inp_func inpf, 6983 asoc_func af, 6984 inp_func inpe, 6985 uint32_t pcb_state, 6986 uint32_t pcb_features, 6987 uint32_t asoc_state, 6988 void *argp, 6989 uint32_t argi, 6990 end_func ef, 6991 struct sctp_inpcb *s_inp, 6992 uint8_t chunk_output_off) 6993 { 6994 struct sctp_iterator *it = NULL; 6995 6996 if (af == NULL) { 6997 return (-1); 6998 } 6999 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7000 SCTP_M_ITER); 7001 if (it == NULL) { 7002 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7003 return (ENOMEM); 7004 } 7005 memset(it, 0, sizeof(*it)); 7006 it->function_assoc = af; 7007 it->function_inp = inpf; 7008 if (inpf) 7009 it->done_current_ep = 0; 7010 else 7011 it->done_current_ep = 1; 7012 it->function_atend = ef; 7013 it->pointer = argp; 7014 it->val = argi; 7015 it->pcb_flags = pcb_state; 7016 it->pcb_features = pcb_features; 7017 it->asoc_state = asoc_state; 7018 it->function_inp_end = inpe; 7019 it->no_chunk_output = chunk_output_off; 7020 it->vn = curvnet; 7021 if (s_inp) { 7022 /* Assume lock is held here */ 7023 it->inp = s_inp; 7024 SCTP_INP_INCR_REF(it->inp); 7025 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7026 } else { 7027 SCTP_INP_INFO_RLOCK(); 7028 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7029 if (it->inp) { 7030 SCTP_INP_INCR_REF(it->inp); 7031 } 7032 SCTP_INP_INFO_RUNLOCK(); 7033 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7034 7035 } 7036 SCTP_IPI_ITERATOR_WQ_LOCK(); 7037 7038 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7039 if (sctp_it_ctl.iterator_running == 0) { 7040 sctp_wakeup_iterator(); 7041 } 7042 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7043 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7044 return (0); 7045 } 7046