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 #include <netinet/udp.h> 50 #ifdef INET6 51 #include <netinet6/ip6_var.h> 52 #endif 53 #include <sys/sched.h> 54 #include <sys/smp.h> 55 #include <sys/unistd.h> 56 57 58 VNET_DEFINE(struct sctp_base_info, system_base_info); 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return (0); 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 79 #endif 80 81 void 82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 83 { 84 /* 85 * We really don't need to lock this, but I will just because it 86 * does not hurt. 87 */ 88 SCTP_INP_INFO_RLOCK(); 89 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 90 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 91 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 92 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 93 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 94 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 95 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 96 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 97 98 SCTP_INP_INFO_RUNLOCK(); 99 } 100 101 /* 102 * Addresses are added to VRF's (Virtual Router's). For BSD we 103 * have only the default VRF 0. We maintain a hash list of 104 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 105 * these has a list of addresses. When we add a new address 106 * to a VRF we lookup the ifn/ifn_index, if the ifn does 107 * not exist we create it and add it to the list of IFN's 108 * within the VRF. Once we have the sctp_ifn, we add the 109 * address to the list. So we look something like: 110 * 111 * hash-vrf-table 112 * vrf-> ifn-> ifn -> ifn 113 * vrf | 114 * ... +--ifa-> ifa -> ifa 115 * vrf 116 * 117 * We keep these separate lists since the SCTP subsystem will 118 * point to these from its source address selection nets structure. 119 * When an address is deleted it does not happen right away on 120 * the SCTP side, it gets scheduled. What we do when a 121 * delete happens is immediately remove the address from 122 * the master list and decrement the refcount. As our 123 * addip iterator works through and frees the src address 124 * selection pointing to the sctp_ifa, eventually the refcount 125 * will reach 0 and we will delete it. Note that it is assumed 126 * that any locking on system level ifn/ifa is done at the 127 * caller of these functions and these routines will only 128 * lock the SCTP structures as they add or delete things. 129 * 130 * Other notes on VRF concepts. 131 * - An endpoint can be in multiple VRF's 132 * - An association lives within a VRF and only one VRF. 133 * - Any incoming packet we can deduce the VRF for by 134 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 135 * - Any downward send call or connect call must supply the 136 * VRF via ancillary data or via some sort of set default 137 * VRF socket option call (again for BSD no brainer since 138 * the VRF is always 0). 139 * - An endpoint may add multiple VRF's to it. 140 * - Listening sockets can accept associations in any 141 * of the VRF's they are in but the assoc will end up 142 * in only one VRF (gotten from the packet or connect/send). 143 * 144 */ 145 146 struct sctp_vrf * 147 sctp_allocate_vrf(int vrf_id) 148 { 149 struct sctp_vrf *vrf = NULL; 150 struct sctp_vrflist *bucket; 151 152 /* First allocate the VRF structure */ 153 vrf = sctp_find_vrf(vrf_id); 154 if (vrf) { 155 /* Already allocated */ 156 return (vrf); 157 } 158 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 159 SCTP_M_VRF); 160 if (vrf == NULL) { 161 /* No memory */ 162 #ifdef INVARIANTS 163 panic("No memory for VRF:%d", vrf_id); 164 #endif 165 return (NULL); 166 } 167 /* setup the VRF */ 168 memset(vrf, 0, sizeof(struct sctp_vrf)); 169 vrf->vrf_id = vrf_id; 170 LIST_INIT(&vrf->ifnlist); 171 vrf->total_ifa_count = 0; 172 vrf->refcount = 0; 173 /* now also setup table ids */ 174 SCTP_INIT_VRF_TABLEID(vrf); 175 /* Init the HASH of addresses */ 176 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 177 &vrf->vrf_addr_hashmark); 178 if (vrf->vrf_addr_hash == NULL) { 179 /* No memory */ 180 #ifdef INVARIANTS 181 panic("No memory for VRF:%d", vrf_id); 182 #endif 183 SCTP_FREE(vrf, SCTP_M_VRF); 184 return (NULL); 185 } 186 /* Add it to the hash table */ 187 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 188 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 189 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 190 return (vrf); 191 } 192 193 194 struct sctp_ifn * 195 sctp_find_ifn(void *ifn, uint32_t ifn_index) 196 { 197 struct sctp_ifn *sctp_ifnp; 198 struct sctp_ifnlist *hash_ifn_head; 199 200 /* 201 * We assume the lock is held for the addresses if that's wrong 202 * problems could occur :-) 203 */ 204 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 205 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 206 if (sctp_ifnp->ifn_index == ifn_index) { 207 return (sctp_ifnp); 208 } 209 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 210 return (sctp_ifnp); 211 } 212 } 213 return (NULL); 214 } 215 216 217 218 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 void 234 sctp_free_vrf(struct sctp_vrf *vrf) 235 { 236 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 237 if (vrf->vrf_addr_hash) { 238 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 239 vrf->vrf_addr_hash = NULL; 240 } 241 /* We zero'd the count */ 242 LIST_REMOVE(vrf, next_vrf); 243 SCTP_FREE(vrf, SCTP_M_VRF); 244 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 245 } 246 } 247 248 void 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 250 { 251 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 252 /* We zero'd the count */ 253 if (sctp_ifnp->vrf) { 254 sctp_free_vrf(sctp_ifnp->vrf); 255 } 256 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 257 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 258 } 259 } 260 261 void 262 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 263 { 264 struct sctp_ifn *sctp_ifnp; 265 266 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 267 if (sctp_ifnp != NULL) { 268 sctp_ifnp->ifn_mtu = mtu; 269 } 270 } 271 272 273 void 274 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 275 { 276 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 277 /* We zero'd the count */ 278 if (sctp_ifap->ifn_p) { 279 sctp_free_ifn(sctp_ifap->ifn_p); 280 } 281 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 282 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 283 } 284 } 285 286 static void 287 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 288 { 289 struct sctp_ifn *found; 290 291 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 292 if (found == NULL) { 293 /* Not in the list.. sorry */ 294 return; 295 } 296 if (hold_addr_lock == 0) 297 SCTP_IPI_ADDR_WLOCK(); 298 LIST_REMOVE(sctp_ifnp, next_bucket); 299 LIST_REMOVE(sctp_ifnp, next_ifn); 300 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 301 sctp_ifnp->registered_af); 302 if (hold_addr_lock == 0) 303 SCTP_IPI_ADDR_WUNLOCK(); 304 /* Take away the reference, and possibly free it */ 305 sctp_free_ifn(sctp_ifnp); 306 } 307 308 void 309 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 310 const char *if_name, uint32_t ifn_index) 311 { 312 struct sctp_vrf *vrf; 313 struct sctp_ifa *sctp_ifap = NULL; 314 315 SCTP_IPI_ADDR_RLOCK(); 316 vrf = sctp_find_vrf(vrf_id); 317 if (vrf == NULL) { 318 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 319 goto out; 320 321 } 322 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 323 if (sctp_ifap == NULL) { 324 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 325 goto out; 326 } 327 if (sctp_ifap->ifn_p == NULL) { 328 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 329 goto out; 330 } 331 if (if_name) { 332 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 334 sctp_ifap->ifn_p->ifn_name, if_name); 335 goto out; 336 } 337 } else { 338 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 339 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 340 sctp_ifap->ifn_p->ifn_index, ifn_index); 341 goto out; 342 } 343 } 344 345 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 346 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 347 out: 348 SCTP_IPI_ADDR_RUNLOCK(); 349 } 350 351 void 352 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 353 const char *if_name, uint32_t ifn_index) 354 { 355 struct sctp_vrf *vrf; 356 struct sctp_ifa *sctp_ifap = NULL; 357 358 SCTP_IPI_ADDR_RLOCK(); 359 vrf = sctp_find_vrf(vrf_id); 360 if (vrf == NULL) { 361 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 362 goto out; 363 364 } 365 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 366 if (sctp_ifap == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 368 goto out; 369 } 370 if (sctp_ifap->ifn_p == NULL) { 371 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 372 goto out; 373 } 374 if (if_name) { 375 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 376 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 377 sctp_ifap->ifn_p->ifn_name, if_name); 378 goto out; 379 } 380 } else { 381 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 383 sctp_ifap->ifn_p->ifn_index, ifn_index); 384 goto out; 385 } 386 } 387 388 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 389 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 390 out: 391 SCTP_IPI_ADDR_RUNLOCK(); 392 } 393 394 /*- 395 * Add an ifa to an ifn. 396 * Register the interface as necessary. 397 * NOTE: ADDR write lock MUST be held. 398 */ 399 static void 400 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 401 { 402 int ifa_af; 403 404 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 405 sctp_ifap->ifn_p = sctp_ifnp; 406 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 407 /* update address counts */ 408 sctp_ifnp->ifa_count++; 409 ifa_af = sctp_ifap->address.sa.sa_family; 410 switch (ifa_af) { 411 #ifdef INET 412 case AF_INET: 413 sctp_ifnp->num_v4++; 414 break; 415 #endif 416 #ifdef INET6 417 case AF_INET6: 418 sctp_ifnp->num_v6++; 419 break; 420 #endif 421 default: 422 break; 423 } 424 if (sctp_ifnp->ifa_count == 1) { 425 /* register the new interface */ 426 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 427 sctp_ifnp->registered_af = ifa_af; 428 } 429 } 430 431 /*- 432 * Remove an ifa from its ifn. 433 * If no more addresses exist, remove the ifn too. Otherwise, re-register 434 * the interface based on the remaining address families left. 435 * NOTE: ADDR write lock MUST be held. 436 */ 437 static void 438 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 439 { 440 LIST_REMOVE(sctp_ifap, next_ifa); 441 if (sctp_ifap->ifn_p) { 442 /* update address counts */ 443 sctp_ifap->ifn_p->ifa_count--; 444 switch (sctp_ifap->address.sa.sa_family) { 445 #ifdef INET 446 case AF_INET: 447 sctp_ifap->ifn_p->num_v4--; 448 break; 449 #endif 450 #ifdef INET6 451 case AF_INET6: 452 sctp_ifap->ifn_p->num_v6--; 453 break; 454 #endif 455 default: 456 break; 457 } 458 459 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 460 /* remove the ifn, possibly freeing it */ 461 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 462 } else { 463 /* re-register address family type, if needed */ 464 if ((sctp_ifap->ifn_p->num_v6 == 0) && 465 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 466 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 467 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 468 sctp_ifap->ifn_p->registered_af = AF_INET; 469 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 470 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 471 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 472 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 473 sctp_ifap->ifn_p->registered_af = AF_INET6; 474 } 475 /* free the ifn refcount */ 476 sctp_free_ifn(sctp_ifap->ifn_p); 477 } 478 sctp_ifap->ifn_p = NULL; 479 } 480 } 481 482 struct sctp_ifa * 483 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 484 uint32_t ifn_type, const char *if_name, void *ifa, 485 struct sockaddr *addr, uint32_t ifa_flags, 486 int dynamic_add) 487 { 488 struct sctp_vrf *vrf; 489 struct sctp_ifn *sctp_ifnp = NULL; 490 struct sctp_ifa *sctp_ifap = NULL; 491 struct sctp_ifalist *hash_addr_head; 492 struct sctp_ifnlist *hash_ifn_head; 493 uint32_t hash_of_addr; 494 int new_ifn_af = 0; 495 496 #ifdef SCTP_DEBUG 497 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 498 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 499 #endif 500 SCTP_IPI_ADDR_WLOCK(); 501 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 502 if (sctp_ifnp) { 503 vrf = sctp_ifnp->vrf; 504 } else { 505 vrf = sctp_find_vrf(vrf_id); 506 if (vrf == NULL) { 507 vrf = sctp_allocate_vrf(vrf_id); 508 if (vrf == NULL) { 509 SCTP_IPI_ADDR_WUNLOCK(); 510 return (NULL); 511 } 512 } 513 } 514 if (sctp_ifnp == NULL) { 515 /* 516 * build one and add it, can't hold lock until after malloc 517 * done though. 518 */ 519 SCTP_IPI_ADDR_WUNLOCK(); 520 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 521 sizeof(struct sctp_ifn), SCTP_M_IFN); 522 if (sctp_ifnp == NULL) { 523 #ifdef INVARIANTS 524 panic("No memory for IFN"); 525 #endif 526 return (NULL); 527 } 528 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 529 sctp_ifnp->ifn_index = ifn_index; 530 sctp_ifnp->ifn_p = ifn; 531 sctp_ifnp->ifn_type = ifn_type; 532 sctp_ifnp->refcount = 0; 533 sctp_ifnp->vrf = vrf; 534 atomic_add_int(&vrf->refcount, 1); 535 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 536 if (if_name != NULL) { 537 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 538 } else { 539 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 540 } 541 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 542 LIST_INIT(&sctp_ifnp->ifalist); 543 SCTP_IPI_ADDR_WLOCK(); 544 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 545 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 546 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 547 new_ifn_af = 1; 548 } 549 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 550 if (sctp_ifap) { 551 /* Hmm, it already exists? */ 552 if ((sctp_ifap->ifn_p) && 553 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 554 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 555 sctp_ifap->ifn_p->ifn_name, ifn_index, 556 (void *)sctp_ifap); 557 if (new_ifn_af) { 558 /* Remove the created one that we don't want */ 559 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 560 } 561 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 562 /* easy to solve, just switch back to active */ 563 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 564 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 565 sctp_ifap->ifn_p = sctp_ifnp; 566 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 567 } 568 exit_stage_left: 569 SCTP_IPI_ADDR_WUNLOCK(); 570 return (sctp_ifap); 571 } else { 572 if (sctp_ifap->ifn_p) { 573 /* 574 * The last IFN gets the address, remove the 575 * old one 576 */ 577 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 578 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 579 sctp_ifap->ifn_p->ifn_index, if_name, 580 ifn_index); 581 /* remove the address from the old ifn */ 582 sctp_remove_ifa_from_ifn(sctp_ifap); 583 /* move the address over to the new ifn */ 584 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 585 goto exit_stage_left; 586 } else { 587 /* repair ifnp which was NULL ? */ 588 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 589 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 590 (void *)sctp_ifnp, (void *)sctp_ifap); 591 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 592 } 593 goto exit_stage_left; 594 } 595 } 596 SCTP_IPI_ADDR_WUNLOCK(); 597 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 598 if (sctp_ifap == NULL) { 599 #ifdef INVARIANTS 600 panic("No memory for IFA"); 601 #endif 602 return (NULL); 603 } 604 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 605 sctp_ifap->ifn_p = sctp_ifnp; 606 atomic_add_int(&sctp_ifnp->refcount, 1); 607 sctp_ifap->vrf_id = vrf_id; 608 sctp_ifap->ifa = ifa; 609 memcpy(&sctp_ifap->address, addr, addr->sa_len); 610 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 611 sctp_ifap->flags = ifa_flags; 612 /* Set scope */ 613 switch (sctp_ifap->address.sa.sa_family) { 614 #ifdef INET 615 case AF_INET: 616 { 617 struct sockaddr_in *sin; 618 619 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 620 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 621 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 622 sctp_ifap->src_is_loop = 1; 623 } 624 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 625 sctp_ifap->src_is_priv = 1; 626 } 627 sctp_ifnp->num_v4++; 628 if (new_ifn_af) 629 new_ifn_af = AF_INET; 630 break; 631 } 632 #endif 633 #ifdef INET6 634 case AF_INET6: 635 { 636 /* ok to use deprecated addresses? */ 637 struct sockaddr_in6 *sin6; 638 639 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 640 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 641 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 642 sctp_ifap->src_is_loop = 1; 643 } 644 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 645 sctp_ifap->src_is_priv = 1; 646 } 647 sctp_ifnp->num_v6++; 648 if (new_ifn_af) 649 new_ifn_af = AF_INET6; 650 break; 651 } 652 #endif 653 default: 654 new_ifn_af = 0; 655 break; 656 } 657 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 658 659 if ((sctp_ifap->src_is_priv == 0) && 660 (sctp_ifap->src_is_loop == 0)) { 661 sctp_ifap->src_is_glob = 1; 662 } 663 SCTP_IPI_ADDR_WLOCK(); 664 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 665 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 666 sctp_ifap->refcount = 1; 667 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 668 sctp_ifnp->ifa_count++; 669 vrf->total_ifa_count++; 670 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 671 if (new_ifn_af) { 672 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 673 sctp_ifnp->registered_af = new_ifn_af; 674 } 675 SCTP_IPI_ADDR_WUNLOCK(); 676 if (dynamic_add) { 677 /* 678 * Bump up the refcount so that when the timer completes it 679 * will drop back down. 680 */ 681 struct sctp_laddr *wi; 682 683 atomic_add_int(&sctp_ifap->refcount, 1); 684 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 685 if (wi == NULL) { 686 /* 687 * Gak, what can we do? We have lost an address 688 * change can you say HOSED? 689 */ 690 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 691 /* Opps, must decrement the count */ 692 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 693 if_name); 694 return (NULL); 695 } 696 SCTP_INCR_LADDR_COUNT(); 697 bzero(wi, sizeof(*wi)); 698 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 699 wi->ifa = sctp_ifap; 700 wi->action = SCTP_ADD_IP_ADDRESS; 701 702 SCTP_WQ_ADDR_LOCK(); 703 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 704 SCTP_WQ_ADDR_UNLOCK(); 705 706 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 707 (struct sctp_inpcb *)NULL, 708 (struct sctp_tcb *)NULL, 709 (struct sctp_nets *)NULL); 710 } else { 711 /* it's ready for use */ 712 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 713 } 714 return (sctp_ifap); 715 } 716 717 void 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 719 uint32_t ifn_index, const char *if_name) 720 { 721 struct sctp_vrf *vrf; 722 struct sctp_ifa *sctp_ifap = NULL; 723 724 SCTP_IPI_ADDR_WLOCK(); 725 vrf = sctp_find_vrf(vrf_id); 726 if (vrf == NULL) { 727 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 728 goto out_now; 729 } 730 #ifdef SCTP_DEBUG 731 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 732 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 733 #endif 734 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 735 if (sctp_ifap) { 736 /* Validate the delete */ 737 if (sctp_ifap->ifn_p) { 738 int valid = 0; 739 740 /*- 741 * The name has priority over the ifn_index 742 * if its given. We do this especially for 743 * panda who might recycle indexes fast. 744 */ 745 if (if_name) { 746 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 747 /* They match its a correct delete */ 748 valid = 1; 749 } 750 } 751 if (!valid) { 752 /* last ditch check ifn_index */ 753 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 754 valid = 1; 755 } 756 } 757 if (!valid) { 758 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 759 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 760 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 761 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 762 SCTP_IPI_ADDR_WUNLOCK(); 763 return; 764 } 765 } 766 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 767 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 768 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 769 vrf->total_ifa_count--; 770 LIST_REMOVE(sctp_ifap, next_bucket); 771 sctp_remove_ifa_from_ifn(sctp_ifap); 772 } 773 #ifdef SCTP_DEBUG 774 else { 775 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 776 ifn_index); 777 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 778 } 779 #endif 780 781 out_now: 782 SCTP_IPI_ADDR_WUNLOCK(); 783 if (sctp_ifap) { 784 struct sctp_laddr *wi; 785 786 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 787 if (wi == NULL) { 788 /* 789 * Gak, what can we do? We have lost an address 790 * change can you say HOSED? 791 */ 792 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 793 794 /* Oops, must decrement the count */ 795 sctp_free_ifa(sctp_ifap); 796 return; 797 } 798 SCTP_INCR_LADDR_COUNT(); 799 bzero(wi, sizeof(*wi)); 800 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 801 wi->ifa = sctp_ifap; 802 wi->action = SCTP_DEL_IP_ADDRESS; 803 SCTP_WQ_ADDR_LOCK(); 804 /* 805 * Should this really be a tailq? As it is we will process 806 * the newest first :-0 807 */ 808 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 809 SCTP_WQ_ADDR_UNLOCK(); 810 811 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 812 (struct sctp_inpcb *)NULL, 813 (struct sctp_tcb *)NULL, 814 (struct sctp_nets *)NULL); 815 } 816 return; 817 } 818 819 820 static struct sctp_tcb * 821 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 822 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 823 { 824 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 825 /* 826 * If we support the TCP model, then we must now dig through to see 827 * if we can find our endpoint in the list of tcp ep's. 828 */ 829 uint16_t lport, rport; 830 struct sctppcbhead *ephead; 831 struct sctp_inpcb *inp; 832 struct sctp_laddr *laddr; 833 struct sctp_tcb *stcb; 834 struct sctp_nets *net; 835 836 if ((to == NULL) || (from == NULL)) { 837 return (NULL); 838 } 839 switch (to->sa_family) { 840 #ifdef INET 841 case AF_INET: 842 if (from->sa_family == AF_INET) { 843 lport = ((struct sockaddr_in *)to)->sin_port; 844 rport = ((struct sockaddr_in *)from)->sin_port; 845 } else { 846 return (NULL); 847 } 848 break; 849 #endif 850 #ifdef INET6 851 case AF_INET6: 852 if (from->sa_family == AF_INET6) { 853 lport = ((struct sockaddr_in6 *)to)->sin6_port; 854 rport = ((struct sockaddr_in6 *)from)->sin6_port; 855 } else { 856 return (NULL); 857 } 858 break; 859 #endif 860 default: 861 return (NULL); 862 } 863 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 864 /* 865 * Ok now for each of the guys in this bucket we must look and see: 866 * - Does the remote port match. - Does there single association's 867 * addresses match this address (to). If so we update p_ep to point 868 * to this ep and return the tcb from it. 869 */ 870 LIST_FOREACH(inp, ephead, sctp_hash) { 871 SCTP_INP_RLOCK(inp); 872 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 873 SCTP_INP_RUNLOCK(inp); 874 continue; 875 } 876 if (lport != inp->sctp_lport) { 877 SCTP_INP_RUNLOCK(inp); 878 continue; 879 } 880 if (inp->def_vrf_id != vrf_id) { 881 SCTP_INP_RUNLOCK(inp); 882 continue; 883 } 884 /* check to see if the ep has one of the addresses */ 885 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 886 /* We are NOT bound all, so look further */ 887 int match = 0; 888 889 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 890 891 if (laddr->ifa == NULL) { 892 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 893 continue; 894 } 895 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 896 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 897 continue; 898 } 899 if (laddr->ifa->address.sa.sa_family == 900 to->sa_family) { 901 /* see if it matches */ 902 903 #ifdef INET 904 if (from->sa_family == AF_INET) { 905 struct sockaddr_in *intf_addr, 906 *sin; 907 908 intf_addr = &laddr->ifa->address.sin; 909 sin = (struct sockaddr_in *)to; 910 if (sin->sin_addr.s_addr == 911 intf_addr->sin_addr.s_addr) { 912 match = 1; 913 break; 914 } 915 } 916 #endif 917 #ifdef INET6 918 if (from->sa_family == AF_INET6) { 919 struct sockaddr_in6 *intf_addr6; 920 struct sockaddr_in6 *sin6; 921 922 sin6 = (struct sockaddr_in6 *) 923 to; 924 intf_addr6 = &laddr->ifa->address.sin6; 925 926 if (SCTP6_ARE_ADDR_EQUAL(sin6, 927 intf_addr6)) { 928 match = 1; 929 break; 930 } 931 } 932 #endif 933 } 934 } 935 if (match == 0) { 936 /* This endpoint does not have this address */ 937 SCTP_INP_RUNLOCK(inp); 938 continue; 939 } 940 } 941 /* 942 * Ok if we hit here the ep has the address, does it hold 943 * the tcb? 944 */ 945 946 stcb = LIST_FIRST(&inp->sctp_asoc_list); 947 if (stcb == NULL) { 948 SCTP_INP_RUNLOCK(inp); 949 continue; 950 } 951 SCTP_TCB_LOCK(stcb); 952 if (stcb->rport != rport) { 953 /* remote port does not match. */ 954 SCTP_TCB_UNLOCK(stcb); 955 SCTP_INP_RUNLOCK(inp); 956 continue; 957 } 958 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 959 SCTP_TCB_UNLOCK(stcb); 960 SCTP_INP_RUNLOCK(inp); 961 continue; 962 } 963 /* Does this TCB have a matching address? */ 964 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 965 966 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 967 /* not the same family, can't be a match */ 968 continue; 969 } 970 switch (from->sa_family) { 971 #ifdef INET 972 case AF_INET: 973 { 974 struct sockaddr_in *sin, *rsin; 975 976 sin = (struct sockaddr_in *)&net->ro._l_addr; 977 rsin = (struct sockaddr_in *)from; 978 if (sin->sin_addr.s_addr == 979 rsin->sin_addr.s_addr) { 980 /* found it */ 981 if (netp != NULL) { 982 *netp = net; 983 } 984 /* 985 * Update the endpoint 986 * pointer 987 */ 988 *inp_p = inp; 989 SCTP_INP_RUNLOCK(inp); 990 return (stcb); 991 } 992 break; 993 } 994 #endif 995 #ifdef INET6 996 case AF_INET6: 997 { 998 struct sockaddr_in6 *sin6, *rsin6; 999 1000 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1001 rsin6 = (struct sockaddr_in6 *)from; 1002 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1003 rsin6)) { 1004 /* found it */ 1005 if (netp != NULL) { 1006 *netp = net; 1007 } 1008 /* 1009 * Update the endpoint 1010 * pointer 1011 */ 1012 *inp_p = inp; 1013 SCTP_INP_RUNLOCK(inp); 1014 return (stcb); 1015 } 1016 break; 1017 } 1018 #endif 1019 default: 1020 /* TSNH */ 1021 break; 1022 } 1023 } 1024 SCTP_TCB_UNLOCK(stcb); 1025 SCTP_INP_RUNLOCK(inp); 1026 } 1027 return (NULL); 1028 } 1029 1030 static int 1031 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1032 { 1033 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 1034 int ipv4_addr_legal, ipv6_addr_legal; 1035 struct sctp_vrf *vrf; 1036 struct sctp_ifn *sctp_ifn; 1037 struct sctp_ifa *sctp_ifa; 1038 1039 loopback_scope = stcb->asoc.loopback_scope; 1040 ipv4_local_scope = stcb->asoc.ipv4_local_scope; 1041 local_scope = stcb->asoc.local_scope; 1042 site_scope = stcb->asoc.site_scope; 1043 ipv4_addr_legal = ipv6_addr_legal = 0; 1044 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1045 ipv6_addr_legal = 1; 1046 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) { 1047 ipv4_addr_legal = 1; 1048 } 1049 } else { 1050 ipv4_addr_legal = 1; 1051 } 1052 1053 SCTP_IPI_ADDR_RLOCK(); 1054 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1055 if (vrf == NULL) { 1056 /* no vrf, no addresses */ 1057 SCTP_IPI_ADDR_RUNLOCK(); 1058 return (0); 1059 } 1060 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1061 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1062 if ((loopback_scope == 0) && 1063 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1064 continue; 1065 } 1066 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1067 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 1068 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 1069 /* 1070 * We allow pending addresses, where 1071 * we have sent an asconf-add to be 1072 * considered valid. 1073 */ 1074 continue; 1075 } 1076 switch (sctp_ifa->address.sa.sa_family) { 1077 #ifdef INET 1078 case AF_INET: 1079 if (ipv4_addr_legal) { 1080 struct sockaddr_in *sin, 1081 *rsin; 1082 1083 sin = &sctp_ifa->address.sin; 1084 rsin = (struct sockaddr_in *)to; 1085 if ((ipv4_local_scope == 0) && 1086 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1087 continue; 1088 } 1089 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1090 SCTP_IPI_ADDR_RUNLOCK(); 1091 return (1); 1092 } 1093 } 1094 break; 1095 #endif 1096 #ifdef INET6 1097 case AF_INET6: 1098 if (ipv6_addr_legal) { 1099 struct sockaddr_in6 *sin6, 1100 *rsin6; 1101 1102 sin6 = &sctp_ifa->address.sin6; 1103 rsin6 = (struct sockaddr_in6 *)to; 1104 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1105 if (local_scope == 0) 1106 continue; 1107 if (sin6->sin6_scope_id == 0) { 1108 if (sa6_recoverscope(sin6) != 0) 1109 continue; 1110 } 1111 } 1112 if ((site_scope == 0) && 1113 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1114 continue; 1115 } 1116 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1117 SCTP_IPI_ADDR_RUNLOCK(); 1118 return (1); 1119 } 1120 } 1121 break; 1122 #endif 1123 default: 1124 /* TSNH */ 1125 break; 1126 } 1127 } 1128 } 1129 } else { 1130 struct sctp_laddr *laddr; 1131 1132 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1133 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 1134 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 1135 /* 1136 * We allow pending addresses, where we have 1137 * sent an asconf-add to be considered 1138 * valid. 1139 */ 1140 continue; 1141 } 1142 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 1143 continue; 1144 } 1145 switch (to->sa_family) { 1146 #ifdef INET 1147 case AF_INET: 1148 { 1149 struct sockaddr_in *sin, *rsin; 1150 1151 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 1152 rsin = (struct sockaddr_in *)to; 1153 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1154 SCTP_IPI_ADDR_RUNLOCK(); 1155 return (1); 1156 } 1157 break; 1158 } 1159 #endif 1160 #ifdef INET6 1161 case AF_INET6: 1162 { 1163 struct sockaddr_in6 *sin6, *rsin6; 1164 1165 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1166 rsin6 = (struct sockaddr_in6 *)to; 1167 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1168 SCTP_IPI_ADDR_RUNLOCK(); 1169 return (1); 1170 } 1171 break; 1172 } 1173 1174 #endif 1175 default: 1176 /* TSNH */ 1177 break; 1178 } 1179 1180 } 1181 } 1182 SCTP_IPI_ADDR_RUNLOCK(); 1183 return (0); 1184 } 1185 1186 /* 1187 * rules for use 1188 * 1189 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1190 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1191 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1192 * NULL. 1193 */ 1194 1195 struct sctp_tcb * 1196 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1197 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1198 { 1199 struct sctpasochead *head; 1200 struct sctp_inpcb *inp; 1201 struct sctp_tcb *stcb = NULL; 1202 struct sctp_nets *net; 1203 uint16_t rport; 1204 1205 inp = *inp_p; 1206 switch (remote->sa_family) { 1207 #ifdef INET 1208 case AF_INET: 1209 rport = (((struct sockaddr_in *)remote)->sin_port); 1210 break; 1211 #endif 1212 #ifdef INET6 1213 case AF_INET6: 1214 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1215 break; 1216 #endif 1217 default: 1218 return (NULL); 1219 } 1220 if (locked_tcb) { 1221 /* 1222 * UN-lock so we can do proper locking here this occurs when 1223 * called from load_addresses_from_init. 1224 */ 1225 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1226 SCTP_TCB_UNLOCK(locked_tcb); 1227 } 1228 SCTP_INP_INFO_RLOCK(); 1229 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1230 /*- 1231 * Now either this guy is our listener or it's the 1232 * connector. If it is the one that issued the connect, then 1233 * it's only chance is to be the first TCB in the list. If 1234 * it is the acceptor, then do the special_lookup to hash 1235 * and find the real inp. 1236 */ 1237 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1238 /* to is peer addr, from is my addr */ 1239 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1240 netp, inp->def_vrf_id); 1241 if ((stcb != NULL) && (locked_tcb == NULL)) { 1242 /* we have a locked tcb, lower refcount */ 1243 SCTP_INP_DECR_REF(inp); 1244 } 1245 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1246 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1247 SCTP_TCB_LOCK(locked_tcb); 1248 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1249 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1250 } 1251 SCTP_INP_INFO_RUNLOCK(); 1252 return (stcb); 1253 } else { 1254 SCTP_INP_WLOCK(inp); 1255 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1256 goto null_return; 1257 } 1258 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1259 if (stcb == NULL) { 1260 goto null_return; 1261 } 1262 SCTP_TCB_LOCK(stcb); 1263 1264 if (stcb->rport != rport) { 1265 /* remote port does not match. */ 1266 SCTP_TCB_UNLOCK(stcb); 1267 goto null_return; 1268 } 1269 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1270 SCTP_TCB_UNLOCK(stcb); 1271 goto null_return; 1272 } 1273 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1274 SCTP_TCB_UNLOCK(stcb); 1275 goto null_return; 1276 } 1277 /* now look at the list of remote addresses */ 1278 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1279 #ifdef INVARIANTS 1280 if (net == (TAILQ_NEXT(net, sctp_next))) { 1281 panic("Corrupt net list"); 1282 } 1283 #endif 1284 if (net->ro._l_addr.sa.sa_family != 1285 remote->sa_family) { 1286 /* not the same family */ 1287 continue; 1288 } 1289 switch (remote->sa_family) { 1290 #ifdef INET 1291 case AF_INET: 1292 { 1293 struct sockaddr_in *sin, 1294 *rsin; 1295 1296 sin = (struct sockaddr_in *) 1297 &net->ro._l_addr; 1298 rsin = (struct sockaddr_in *)remote; 1299 if (sin->sin_addr.s_addr == 1300 rsin->sin_addr.s_addr) { 1301 /* found it */ 1302 if (netp != NULL) { 1303 *netp = net; 1304 } 1305 if (locked_tcb == NULL) { 1306 SCTP_INP_DECR_REF(inp); 1307 } else if (locked_tcb != stcb) { 1308 SCTP_TCB_LOCK(locked_tcb); 1309 } 1310 if (locked_tcb) { 1311 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1312 } 1313 SCTP_INP_WUNLOCK(inp); 1314 SCTP_INP_INFO_RUNLOCK(); 1315 return (stcb); 1316 } 1317 break; 1318 } 1319 #endif 1320 #ifdef INET6 1321 case AF_INET6: 1322 { 1323 struct sockaddr_in6 *sin6, 1324 *rsin6; 1325 1326 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1327 rsin6 = (struct sockaddr_in6 *)remote; 1328 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1329 rsin6)) { 1330 /* found it */ 1331 if (netp != NULL) { 1332 *netp = net; 1333 } 1334 if (locked_tcb == NULL) { 1335 SCTP_INP_DECR_REF(inp); 1336 } else if (locked_tcb != stcb) { 1337 SCTP_TCB_LOCK(locked_tcb); 1338 } 1339 if (locked_tcb) { 1340 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1341 } 1342 SCTP_INP_WUNLOCK(inp); 1343 SCTP_INP_INFO_RUNLOCK(); 1344 return (stcb); 1345 } 1346 break; 1347 } 1348 #endif 1349 default: 1350 /* TSNH */ 1351 break; 1352 } 1353 } 1354 SCTP_TCB_UNLOCK(stcb); 1355 } 1356 } else { 1357 SCTP_INP_WLOCK(inp); 1358 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1359 goto null_return; 1360 } 1361 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1362 inp->sctp_hashmark)]; 1363 if (head == NULL) { 1364 goto null_return; 1365 } 1366 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1367 if (stcb->rport != rport) { 1368 /* remote port does not match */ 1369 continue; 1370 } 1371 SCTP_TCB_LOCK(stcb); 1372 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1373 SCTP_TCB_UNLOCK(stcb); 1374 continue; 1375 } 1376 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1377 SCTP_TCB_UNLOCK(stcb); 1378 continue; 1379 } 1380 /* now look at the list of remote addresses */ 1381 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1382 #ifdef INVARIANTS 1383 if (net == (TAILQ_NEXT(net, sctp_next))) { 1384 panic("Corrupt net list"); 1385 } 1386 #endif 1387 if (net->ro._l_addr.sa.sa_family != 1388 remote->sa_family) { 1389 /* not the same family */ 1390 continue; 1391 } 1392 switch (remote->sa_family) { 1393 #ifdef INET 1394 case AF_INET: 1395 { 1396 struct sockaddr_in *sin, 1397 *rsin; 1398 1399 sin = (struct sockaddr_in *) 1400 &net->ro._l_addr; 1401 rsin = (struct sockaddr_in *)remote; 1402 if (sin->sin_addr.s_addr == 1403 rsin->sin_addr.s_addr) { 1404 /* found it */ 1405 if (netp != NULL) { 1406 *netp = net; 1407 } 1408 if (locked_tcb == NULL) { 1409 SCTP_INP_DECR_REF(inp); 1410 } else if (locked_tcb != stcb) { 1411 SCTP_TCB_LOCK(locked_tcb); 1412 } 1413 if (locked_tcb) { 1414 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1415 } 1416 SCTP_INP_WUNLOCK(inp); 1417 SCTP_INP_INFO_RUNLOCK(); 1418 return (stcb); 1419 } 1420 break; 1421 } 1422 #endif 1423 #ifdef INET6 1424 case AF_INET6: 1425 { 1426 struct sockaddr_in6 *sin6, 1427 *rsin6; 1428 1429 sin6 = (struct sockaddr_in6 *) 1430 &net->ro._l_addr; 1431 rsin6 = (struct sockaddr_in6 *)remote; 1432 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1433 rsin6)) { 1434 /* found it */ 1435 if (netp != NULL) { 1436 *netp = net; 1437 } 1438 if (locked_tcb == NULL) { 1439 SCTP_INP_DECR_REF(inp); 1440 } else if (locked_tcb != stcb) { 1441 SCTP_TCB_LOCK(locked_tcb); 1442 } 1443 if (locked_tcb) { 1444 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1445 } 1446 SCTP_INP_WUNLOCK(inp); 1447 SCTP_INP_INFO_RUNLOCK(); 1448 return (stcb); 1449 } 1450 break; 1451 } 1452 #endif 1453 default: 1454 /* TSNH */ 1455 break; 1456 } 1457 } 1458 SCTP_TCB_UNLOCK(stcb); 1459 } 1460 } 1461 null_return: 1462 /* clean up for returning null */ 1463 if (locked_tcb) { 1464 SCTP_TCB_LOCK(locked_tcb); 1465 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1466 } 1467 SCTP_INP_WUNLOCK(inp); 1468 SCTP_INP_INFO_RUNLOCK(); 1469 /* not found */ 1470 return (NULL); 1471 } 1472 1473 /* 1474 * Find an association for a specific endpoint using the association id given 1475 * out in the COMM_UP notification 1476 */ 1477 1478 struct sctp_tcb * 1479 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1480 { 1481 /* 1482 * Use my the assoc_id to find a endpoint 1483 */ 1484 struct sctpasochead *head; 1485 struct sctp_tcb *stcb; 1486 uint32_t id; 1487 1488 if (inp == NULL) { 1489 SCTP_PRINTF("TSNH ep_associd\n"); 1490 return (NULL); 1491 } 1492 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1493 SCTP_PRINTF("TSNH ep_associd0\n"); 1494 return (NULL); 1495 } 1496 id = (uint32_t) asoc_id; 1497 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1498 if (head == NULL) { 1499 /* invalid id TSNH */ 1500 SCTP_PRINTF("TSNH ep_associd1\n"); 1501 return (NULL); 1502 } 1503 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1504 if (stcb->asoc.assoc_id == id) { 1505 if (inp != stcb->sctp_ep) { 1506 /* 1507 * some other guy has the same id active (id 1508 * collision ??). 1509 */ 1510 SCTP_PRINTF("TSNH ep_associd2\n"); 1511 continue; 1512 } 1513 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1514 continue; 1515 } 1516 if (want_lock) { 1517 SCTP_TCB_LOCK(stcb); 1518 } 1519 return (stcb); 1520 } 1521 } 1522 return (NULL); 1523 } 1524 1525 1526 struct sctp_tcb * 1527 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1528 { 1529 struct sctp_tcb *stcb; 1530 1531 SCTP_INP_RLOCK(inp); 1532 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1533 SCTP_INP_RUNLOCK(inp); 1534 return (stcb); 1535 } 1536 1537 1538 static struct sctp_inpcb * 1539 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1540 uint16_t lport, uint32_t vrf_id) 1541 { 1542 struct sctp_inpcb *inp; 1543 struct sctp_laddr *laddr; 1544 1545 #ifdef INET 1546 struct sockaddr_in *sin; 1547 1548 #endif 1549 #ifdef INET6 1550 struct sockaddr_in6 *sin6; 1551 struct sockaddr_in6 *intf_addr6; 1552 1553 #endif 1554 1555 int fnd; 1556 1557 /* 1558 * Endpoint probe expects that the INP_INFO is locked. 1559 */ 1560 #ifdef INET 1561 sin = NULL; 1562 #endif 1563 #ifdef INET6 1564 sin6 = NULL; 1565 #endif 1566 switch (nam->sa_family) { 1567 #ifdef INET 1568 case AF_INET: 1569 sin = (struct sockaddr_in *)nam; 1570 break; 1571 #endif 1572 #ifdef INET6 1573 case AF_INET6: 1574 sin6 = (struct sockaddr_in6 *)nam; 1575 break; 1576 #endif 1577 default: 1578 /* unsupported family */ 1579 return (NULL); 1580 } 1581 1582 if (head == NULL) 1583 return (NULL); 1584 1585 LIST_FOREACH(inp, head, sctp_hash) { 1586 SCTP_INP_RLOCK(inp); 1587 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1588 SCTP_INP_RUNLOCK(inp); 1589 continue; 1590 } 1591 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1592 (inp->sctp_lport == lport)) { 1593 /* got it */ 1594 #ifdef INET 1595 if ((nam->sa_family == AF_INET) && 1596 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1597 SCTP_IPV6_V6ONLY(inp)) { 1598 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1599 SCTP_INP_RUNLOCK(inp); 1600 continue; 1601 } 1602 #endif 1603 #ifdef INET6 1604 /* A V6 address and the endpoint is NOT bound V6 */ 1605 if (nam->sa_family == AF_INET6 && 1606 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1607 SCTP_INP_RUNLOCK(inp); 1608 continue; 1609 } 1610 #endif 1611 /* does a VRF id match? */ 1612 fnd = 0; 1613 if (inp->def_vrf_id == vrf_id) 1614 fnd = 1; 1615 1616 SCTP_INP_RUNLOCK(inp); 1617 if (!fnd) 1618 continue; 1619 return (inp); 1620 } 1621 SCTP_INP_RUNLOCK(inp); 1622 } 1623 switch (nam->sa_family) { 1624 #ifdef INET 1625 case AF_INET: 1626 if (sin->sin_addr.s_addr == INADDR_ANY) { 1627 /* Can't hunt for one that has no address specified */ 1628 return (NULL); 1629 } 1630 break; 1631 #endif 1632 #ifdef INET6 1633 case AF_INET6: 1634 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1635 /* Can't hunt for one that has no address specified */ 1636 return (NULL); 1637 } 1638 break; 1639 #endif 1640 default: 1641 break; 1642 } 1643 /* 1644 * ok, not bound to all so see if we can find a EP bound to this 1645 * address. 1646 */ 1647 LIST_FOREACH(inp, head, sctp_hash) { 1648 SCTP_INP_RLOCK(inp); 1649 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1650 SCTP_INP_RUNLOCK(inp); 1651 continue; 1652 } 1653 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1654 SCTP_INP_RUNLOCK(inp); 1655 continue; 1656 } 1657 /* 1658 * Ok this could be a likely candidate, look at all of its 1659 * addresses 1660 */ 1661 if (inp->sctp_lport != lport) { 1662 SCTP_INP_RUNLOCK(inp); 1663 continue; 1664 } 1665 /* does a VRF id match? */ 1666 fnd = 0; 1667 if (inp->def_vrf_id == vrf_id) 1668 fnd = 1; 1669 1670 if (!fnd) { 1671 SCTP_INP_RUNLOCK(inp); 1672 continue; 1673 } 1674 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1675 if (laddr->ifa == NULL) { 1676 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1677 __FUNCTION__); 1678 continue; 1679 } 1680 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1681 (void *)laddr->ifa); 1682 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1683 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1684 continue; 1685 } 1686 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1687 /* possible, see if it matches */ 1688 switch (nam->sa_family) { 1689 #ifdef INET 1690 case AF_INET: 1691 if (sin->sin_addr.s_addr == 1692 laddr->ifa->address.sin.sin_addr.s_addr) { 1693 SCTP_INP_RUNLOCK(inp); 1694 return (inp); 1695 } 1696 break; 1697 #endif 1698 #ifdef INET6 1699 case AF_INET6: 1700 intf_addr6 = &laddr->ifa->address.sin6; 1701 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1702 intf_addr6)) { 1703 SCTP_INP_RUNLOCK(inp); 1704 return (inp); 1705 } 1706 break; 1707 #endif 1708 } 1709 } 1710 } 1711 SCTP_INP_RUNLOCK(inp); 1712 } 1713 return (NULL); 1714 } 1715 1716 1717 static struct sctp_inpcb * 1718 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1719 { 1720 struct sctppcbhead *head; 1721 struct sctp_inpcb *t_inp; 1722 int fnd; 1723 1724 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1725 SCTP_BASE_INFO(hashmark))]; 1726 LIST_FOREACH(t_inp, head, sctp_hash) { 1727 if (t_inp->sctp_lport != lport) { 1728 continue; 1729 } 1730 /* is it in the VRF in question */ 1731 fnd = 0; 1732 if (t_inp->def_vrf_id == vrf_id) 1733 fnd = 1; 1734 if (!fnd) 1735 continue; 1736 1737 /* This one is in use. */ 1738 /* check the v6/v4 binding issue */ 1739 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1740 SCTP_IPV6_V6ONLY(t_inp)) { 1741 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1742 /* collision in V6 space */ 1743 return (t_inp); 1744 } else { 1745 /* inp is BOUND_V4 no conflict */ 1746 continue; 1747 } 1748 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1749 /* t_inp is bound v4 and v6, conflict always */ 1750 return (t_inp); 1751 } else { 1752 /* t_inp is bound only V4 */ 1753 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1754 SCTP_IPV6_V6ONLY(inp)) { 1755 /* no conflict */ 1756 continue; 1757 } 1758 /* else fall through to conflict */ 1759 } 1760 return (t_inp); 1761 } 1762 return (NULL); 1763 } 1764 1765 1766 int 1767 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1768 { 1769 /* For 1-2-1 with port reuse */ 1770 struct sctppcbhead *head; 1771 struct sctp_inpcb *tinp; 1772 1773 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1774 /* only works with port reuse on */ 1775 return (-1); 1776 } 1777 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1778 return (0); 1779 } 1780 SCTP_INP_RUNLOCK(inp); 1781 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1782 SCTP_BASE_INFO(hashmark))]; 1783 /* Kick out all non-listeners to the TCP hash */ 1784 LIST_FOREACH(tinp, head, sctp_hash) { 1785 if (tinp->sctp_lport != inp->sctp_lport) { 1786 continue; 1787 } 1788 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1789 continue; 1790 } 1791 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1792 continue; 1793 } 1794 if (tinp->sctp_socket->so_qlimit) { 1795 continue; 1796 } 1797 SCTP_INP_WLOCK(tinp); 1798 LIST_REMOVE(tinp, sctp_hash); 1799 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1800 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1801 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1802 SCTP_INP_WUNLOCK(tinp); 1803 } 1804 SCTP_INP_WLOCK(inp); 1805 /* Pull from where he was */ 1806 LIST_REMOVE(inp, sctp_hash); 1807 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1808 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1809 LIST_INSERT_HEAD(head, inp, sctp_hash); 1810 SCTP_INP_WUNLOCK(inp); 1811 SCTP_INP_RLOCK(inp); 1812 return (0); 1813 } 1814 1815 1816 struct sctp_inpcb * 1817 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1818 uint32_t vrf_id) 1819 { 1820 /* 1821 * First we check the hash table to see if someone has this port 1822 * bound with just the port. 1823 */ 1824 struct sctp_inpcb *inp; 1825 struct sctppcbhead *head; 1826 int lport; 1827 unsigned int i; 1828 1829 #ifdef INET 1830 struct sockaddr_in *sin; 1831 1832 #endif 1833 #ifdef INET6 1834 struct sockaddr_in6 *sin6; 1835 1836 #endif 1837 1838 switch (nam->sa_family) { 1839 #ifdef INET 1840 case AF_INET: 1841 sin = (struct sockaddr_in *)nam; 1842 lport = sin->sin_port; 1843 break; 1844 #endif 1845 #ifdef INET6 1846 case AF_INET6: 1847 sin6 = (struct sockaddr_in6 *)nam; 1848 lport = sin6->sin6_port; 1849 break; 1850 #endif 1851 default: 1852 return (NULL); 1853 } 1854 /* 1855 * I could cheat here and just cast to one of the types but we will 1856 * do it right. It also provides the check against an Unsupported 1857 * type too. 1858 */ 1859 /* Find the head of the ALLADDR chain */ 1860 if (have_lock == 0) { 1861 SCTP_INP_INFO_RLOCK(); 1862 } 1863 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1864 SCTP_BASE_INFO(hashmark))]; 1865 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1866 1867 /* 1868 * If the TCP model exists it could be that the main listening 1869 * endpoint is gone but there still exists a connected socket for 1870 * this guy. If so we can return the first one that we find. This 1871 * may NOT be the correct one so the caller should be wary on the 1872 * returned INP. Currently the only caller that sets find_tcp_pool 1873 * is in bindx where we are verifying that a user CAN bind the 1874 * address. He either has bound it already, or someone else has, or 1875 * its open to bind, so this is good enough. 1876 */ 1877 if (inp == NULL && find_tcp_pool) { 1878 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1879 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1880 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1881 if (inp) { 1882 break; 1883 } 1884 } 1885 } 1886 if (inp) { 1887 SCTP_INP_INCR_REF(inp); 1888 } 1889 if (have_lock == 0) { 1890 SCTP_INP_INFO_RUNLOCK(); 1891 } 1892 return (inp); 1893 } 1894 1895 /* 1896 * Find an association for an endpoint with the pointer to whom you want to 1897 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1898 * need to change the *to to some other struct like a mbuf... 1899 */ 1900 struct sctp_tcb * 1901 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1902 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1903 uint32_t vrf_id) 1904 { 1905 struct sctp_inpcb *inp = NULL; 1906 struct sctp_tcb *retval; 1907 1908 SCTP_INP_INFO_RLOCK(); 1909 if (find_tcp_pool) { 1910 if (inp_p != NULL) { 1911 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1912 vrf_id); 1913 } else { 1914 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1915 vrf_id); 1916 } 1917 if (retval != NULL) { 1918 SCTP_INP_INFO_RUNLOCK(); 1919 return (retval); 1920 } 1921 } 1922 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1923 if (inp_p != NULL) { 1924 *inp_p = inp; 1925 } 1926 SCTP_INP_INFO_RUNLOCK(); 1927 1928 if (inp == NULL) { 1929 return (NULL); 1930 } 1931 /* 1932 * ok, we have an endpoint, now lets find the assoc for it (if any) 1933 * we now place the source address or from in the to of the find 1934 * endpoint call. Since in reality this chain is used from the 1935 * inbound packet side. 1936 */ 1937 if (inp_p != NULL) { 1938 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1939 NULL); 1940 } else { 1941 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1942 NULL); 1943 } 1944 return retval; 1945 } 1946 1947 1948 /* 1949 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1950 * find all addresses that the sender has specified in any address list. Each 1951 * address will be used to lookup the TCB and see if one exits. 1952 */ 1953 static struct sctp_tcb * 1954 sctp_findassociation_special_addr(struct mbuf *m, int offset, 1955 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1956 struct sockaddr *dst) 1957 { 1958 struct sctp_paramhdr *phdr, parm_buf; 1959 struct sctp_tcb *retval; 1960 uint32_t ptype, plen; 1961 1962 #ifdef INET 1963 struct sockaddr_in sin4; 1964 1965 #endif 1966 #ifdef INET6 1967 struct sockaddr_in6 sin6; 1968 1969 #endif 1970 1971 #ifdef INET 1972 memset(&sin4, 0, sizeof(sin4)); 1973 sin4.sin_len = sizeof(sin4); 1974 sin4.sin_family = AF_INET; 1975 sin4.sin_port = sh->src_port; 1976 #endif 1977 #ifdef INET6 1978 memset(&sin6, 0, sizeof(sin6)); 1979 sin6.sin6_len = sizeof(sin6); 1980 sin6.sin6_family = AF_INET6; 1981 sin6.sin6_port = sh->src_port; 1982 #endif 1983 1984 retval = NULL; 1985 offset += sizeof(struct sctp_init_chunk); 1986 1987 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1988 while (phdr != NULL) { 1989 /* now we must see if we want the parameter */ 1990 ptype = ntohs(phdr->param_type); 1991 plen = ntohs(phdr->param_length); 1992 if (plen == 0) { 1993 break; 1994 } 1995 #ifdef INET 1996 if (ptype == SCTP_IPV4_ADDRESS && 1997 plen == sizeof(struct sctp_ipv4addr_param)) { 1998 /* Get the rest of the address */ 1999 struct sctp_ipv4addr_param ip4_parm, *p4; 2000 2001 phdr = sctp_get_next_param(m, offset, 2002 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2003 if (phdr == NULL) { 2004 return (NULL); 2005 } 2006 p4 = (struct sctp_ipv4addr_param *)phdr; 2007 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2008 /* look it up */ 2009 retval = sctp_findassociation_ep_addr(inp_p, 2010 (struct sockaddr *)&sin4, netp, dst, NULL); 2011 if (retval != NULL) { 2012 return (retval); 2013 } 2014 } 2015 #endif 2016 #ifdef INET6 2017 if (ptype == SCTP_IPV6_ADDRESS && 2018 plen == sizeof(struct sctp_ipv6addr_param)) { 2019 /* Get the rest of the address */ 2020 struct sctp_ipv6addr_param ip6_parm, *p6; 2021 2022 phdr = sctp_get_next_param(m, offset, 2023 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2024 if (phdr == NULL) { 2025 return (NULL); 2026 } 2027 p6 = (struct sctp_ipv6addr_param *)phdr; 2028 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2029 /* look it up */ 2030 retval = sctp_findassociation_ep_addr(inp_p, 2031 (struct sockaddr *)&sin6, netp, dst, NULL); 2032 if (retval != NULL) { 2033 return (retval); 2034 } 2035 } 2036 #endif 2037 offset += SCTP_SIZE32(plen); 2038 phdr = sctp_get_next_param(m, offset, &parm_buf, 2039 sizeof(parm_buf)); 2040 } 2041 return (NULL); 2042 } 2043 2044 static struct sctp_tcb * 2045 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2046 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2047 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2048 { 2049 /* 2050 * Use my vtag to hash. If we find it we then verify the source addr 2051 * is in the assoc. If all goes well we save a bit on rec of a 2052 * packet. 2053 */ 2054 struct sctpasochead *head; 2055 struct sctp_nets *net; 2056 struct sctp_tcb *stcb; 2057 2058 SCTP_INP_INFO_RLOCK(); 2059 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2060 SCTP_BASE_INFO(hashasocmark))]; 2061 if (head == NULL) { 2062 /* invalid vtag */ 2063 SCTP_INP_INFO_RUNLOCK(); 2064 return (NULL); 2065 } 2066 LIST_FOREACH(stcb, head, sctp_asocs) { 2067 SCTP_INP_RLOCK(stcb->sctp_ep); 2068 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2069 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2070 continue; 2071 } 2072 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2073 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2074 continue; 2075 } 2076 SCTP_TCB_LOCK(stcb); 2077 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2078 if (stcb->asoc.my_vtag == vtag) { 2079 /* candidate */ 2080 if (stcb->rport != rport) { 2081 SCTP_TCB_UNLOCK(stcb); 2082 continue; 2083 } 2084 if (stcb->sctp_ep->sctp_lport != lport) { 2085 SCTP_TCB_UNLOCK(stcb); 2086 continue; 2087 } 2088 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2089 SCTP_TCB_UNLOCK(stcb); 2090 continue; 2091 } 2092 /* RRS:Need toaddr check here */ 2093 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2094 /* Endpoint does not own this address */ 2095 SCTP_TCB_UNLOCK(stcb); 2096 continue; 2097 } 2098 if (remote_tag) { 2099 /* 2100 * If we have both vtags that's all we match 2101 * on 2102 */ 2103 if (stcb->asoc.peer_vtag == remote_tag) { 2104 /* 2105 * If both tags match we consider it 2106 * conclusive and check NO 2107 * source/destination addresses 2108 */ 2109 goto conclusive; 2110 } 2111 } 2112 if (skip_src_check) { 2113 conclusive: 2114 if (from) { 2115 *netp = sctp_findnet(stcb, from); 2116 } else { 2117 *netp = NULL; /* unknown */ 2118 } 2119 if (inp_p) 2120 *inp_p = stcb->sctp_ep; 2121 SCTP_INP_INFO_RUNLOCK(); 2122 return (stcb); 2123 } 2124 net = sctp_findnet(stcb, from); 2125 if (net) { 2126 /* yep its him. */ 2127 *netp = net; 2128 SCTP_STAT_INCR(sctps_vtagexpress); 2129 *inp_p = stcb->sctp_ep; 2130 SCTP_INP_INFO_RUNLOCK(); 2131 return (stcb); 2132 } else { 2133 /* 2134 * not him, this should only happen in rare 2135 * cases so I peg it. 2136 */ 2137 SCTP_STAT_INCR(sctps_vtagbogus); 2138 } 2139 } 2140 SCTP_TCB_UNLOCK(stcb); 2141 } 2142 SCTP_INP_INFO_RUNLOCK(); 2143 return (NULL); 2144 } 2145 2146 /* 2147 * Find an association with the pointer to the inbound IP packet. This can be 2148 * a IPv4 or IPv6 packet. 2149 */ 2150 struct sctp_tcb * 2151 sctp_findassociation_addr(struct mbuf *m, int offset, 2152 struct sockaddr *src, struct sockaddr *dst, 2153 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2154 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2155 { 2156 int find_tcp_pool; 2157 struct sctp_tcb *retval; 2158 struct sctp_inpcb *inp; 2159 2160 if (sh->v_tag) { 2161 /* we only go down this path if vtag is non-zero */ 2162 retval = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2163 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2164 if (retval) { 2165 return (retval); 2166 } 2167 } 2168 find_tcp_pool = 0; 2169 if ((ch->chunk_type != SCTP_INITIATION) && 2170 (ch->chunk_type != SCTP_INITIATION_ACK) && 2171 (ch->chunk_type != SCTP_COOKIE_ACK) && 2172 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2173 /* Other chunk types go to the tcp pool. */ 2174 find_tcp_pool = 1; 2175 } 2176 if (inp_p) { 2177 retval = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2178 find_tcp_pool, vrf_id); 2179 inp = *inp_p; 2180 } else { 2181 retval = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2182 find_tcp_pool, vrf_id); 2183 } 2184 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", (void *)retval, (void *)inp); 2185 if (retval == NULL && inp) { 2186 /* Found a EP but not this address */ 2187 if ((ch->chunk_type == SCTP_INITIATION) || 2188 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2189 /*- 2190 * special hook, we do NOT return linp or an 2191 * association that is linked to an existing 2192 * association that is under the TCP pool (i.e. no 2193 * listener exists). The endpoint finding routine 2194 * will always find a listener before examining the 2195 * TCP pool. 2196 */ 2197 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2198 if (inp_p) { 2199 *inp_p = NULL; 2200 } 2201 return (NULL); 2202 } 2203 retval = sctp_findassociation_special_addr(m, 2204 offset, sh, &inp, netp, dst); 2205 if (inp_p != NULL) { 2206 *inp_p = inp; 2207 } 2208 } 2209 } 2210 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", (void *)retval); 2211 return (retval); 2212 } 2213 2214 /* 2215 * lookup an association by an ASCONF lookup address. 2216 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2217 */ 2218 struct sctp_tcb * 2219 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2220 struct sockaddr *dst, struct sctphdr *sh, 2221 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2222 { 2223 struct sctp_tcb *stcb; 2224 struct sockaddr_storage remote_store; 2225 struct sctp_paramhdr parm_buf, *phdr; 2226 int ptype; 2227 int zero_address = 0; 2228 2229 #ifdef INET 2230 struct sockaddr_in *sin; 2231 2232 #endif 2233 #ifdef INET6 2234 struct sockaddr_in6 *sin6; 2235 2236 #endif 2237 2238 memset(&remote_store, 0, sizeof(remote_store)); 2239 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2240 &parm_buf, sizeof(struct sctp_paramhdr)); 2241 if (phdr == NULL) { 2242 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2243 __FUNCTION__); 2244 return NULL; 2245 } 2246 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2247 /* get the correlation address */ 2248 switch (ptype) { 2249 #ifdef INET6 2250 case SCTP_IPV6_ADDRESS: 2251 { 2252 /* ipv6 address param */ 2253 struct sctp_ipv6addr_param *p6, p6_buf; 2254 2255 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2256 return NULL; 2257 } 2258 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2259 offset + sizeof(struct sctp_asconf_chunk), 2260 &p6_buf.ph, sizeof(*p6)); 2261 if (p6 == NULL) { 2262 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2263 __FUNCTION__); 2264 return (NULL); 2265 } 2266 sin6 = (struct sockaddr_in6 *)&remote_store; 2267 sin6->sin6_family = AF_INET6; 2268 sin6->sin6_len = sizeof(*sin6); 2269 sin6->sin6_port = sh->src_port; 2270 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2271 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2272 zero_address = 1; 2273 break; 2274 } 2275 #endif 2276 #ifdef INET 2277 case SCTP_IPV4_ADDRESS: 2278 { 2279 /* ipv4 address param */ 2280 struct sctp_ipv4addr_param *p4, p4_buf; 2281 2282 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2283 return NULL; 2284 } 2285 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2286 offset + sizeof(struct sctp_asconf_chunk), 2287 &p4_buf.ph, sizeof(*p4)); 2288 if (p4 == NULL) { 2289 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2290 __FUNCTION__); 2291 return (NULL); 2292 } 2293 sin = (struct sockaddr_in *)&remote_store; 2294 sin->sin_family = AF_INET; 2295 sin->sin_len = sizeof(*sin); 2296 sin->sin_port = sh->src_port; 2297 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2298 if (sin->sin_addr.s_addr == INADDR_ANY) 2299 zero_address = 1; 2300 break; 2301 } 2302 #endif 2303 default: 2304 /* invalid address param type */ 2305 return NULL; 2306 } 2307 2308 if (zero_address) { 2309 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2310 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2311 if (stcb != NULL) { 2312 SCTP_INP_DECR_REF(*inp_p); 2313 } 2314 } else { 2315 stcb = sctp_findassociation_ep_addr(inp_p, 2316 (struct sockaddr *)&remote_store, netp, 2317 dst, NULL); 2318 } 2319 return (stcb); 2320 } 2321 2322 2323 /* 2324 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2325 * addresses. This way if we don't get a bind we by default pick a ephemeral 2326 * port with all addresses bound. 2327 */ 2328 int 2329 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2330 { 2331 /* 2332 * we get called when a new endpoint starts up. We need to allocate 2333 * the sctp_inpcb structure from the zone and init it. Mark it as 2334 * unbound and find a port that we can use as an ephemeral with 2335 * INADDR_ANY. If the user binds later no problem we can then add in 2336 * the specific addresses. And setup the default parameters for the 2337 * EP. 2338 */ 2339 int i, error; 2340 struct sctp_inpcb *inp; 2341 struct sctp_pcb *m; 2342 struct timeval time; 2343 sctp_sharedkey_t *null_key; 2344 2345 error = 0; 2346 2347 SCTP_INP_INFO_WLOCK(); 2348 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2349 if (inp == NULL) { 2350 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2351 SCTP_INP_INFO_WUNLOCK(); 2352 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2353 return (ENOBUFS); 2354 } 2355 /* zap it */ 2356 bzero(inp, sizeof(*inp)); 2357 2358 /* bump generations */ 2359 /* setup socket pointers */ 2360 inp->sctp_socket = so; 2361 inp->ip_inp.inp.inp_socket = so; 2362 #ifdef INET6 2363 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2364 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2365 } 2366 #endif 2367 inp->sctp_associd_counter = 1; 2368 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2369 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2370 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2371 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2372 /* init the small hash table we use to track asocid <-> tcb */ 2373 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2374 if (inp->sctp_asocidhash == NULL) { 2375 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2376 SCTP_INP_INFO_WUNLOCK(); 2377 return (ENOBUFS); 2378 } 2379 #ifdef IPSEC 2380 { 2381 struct inpcbpolicy *pcb_sp = NULL; 2382 2383 error = ipsec_init_policy(so, &pcb_sp); 2384 /* Arrange to share the policy */ 2385 inp->ip_inp.inp.inp_sp = pcb_sp; 2386 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2387 } 2388 if (error != 0) { 2389 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2390 SCTP_INP_INFO_WUNLOCK(); 2391 return error; 2392 } 2393 #endif /* IPSEC */ 2394 SCTP_INCR_EP_COUNT(); 2395 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2396 SCTP_INP_INFO_WUNLOCK(); 2397 2398 so->so_pcb = (caddr_t)inp; 2399 2400 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2401 /* UDP style socket */ 2402 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2403 SCTP_PCB_FLAGS_UNBOUND); 2404 /* Be sure it is NON-BLOCKING IO for UDP */ 2405 /* SCTP_SET_SO_NBIO(so); */ 2406 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2407 /* TCP style socket */ 2408 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2409 SCTP_PCB_FLAGS_UNBOUND); 2410 /* Be sure we have blocking IO by default */ 2411 SCTP_CLEAR_SO_NBIO(so); 2412 } else { 2413 /* 2414 * unsupported socket type (RAW, etc)- in case we missed it 2415 * in protosw 2416 */ 2417 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2418 so->so_pcb = NULL; 2419 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2420 return (EOPNOTSUPP); 2421 } 2422 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2423 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2424 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2425 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2426 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2427 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2428 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2429 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2430 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2431 } 2432 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2433 &inp->sctp_hashmark); 2434 if (inp->sctp_tcbhash == NULL) { 2435 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2436 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2437 so->so_pcb = NULL; 2438 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2439 return (ENOBUFS); 2440 } 2441 inp->def_vrf_id = vrf_id; 2442 2443 SCTP_INP_INFO_WLOCK(); 2444 SCTP_INP_LOCK_INIT(inp); 2445 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2446 SCTP_INP_READ_INIT(inp); 2447 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2448 /* lock the new ep */ 2449 SCTP_INP_WLOCK(inp); 2450 2451 /* add it to the info area */ 2452 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2453 SCTP_INP_INFO_WUNLOCK(); 2454 2455 TAILQ_INIT(&inp->read_queue); 2456 LIST_INIT(&inp->sctp_addr_list); 2457 2458 LIST_INIT(&inp->sctp_asoc_list); 2459 2460 #ifdef SCTP_TRACK_FREED_ASOCS 2461 /* TEMP CODE */ 2462 LIST_INIT(&inp->sctp_asoc_free_list); 2463 #endif 2464 /* Init the timer structure for signature change */ 2465 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2466 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2467 2468 /* now init the actual endpoint default data */ 2469 m = &inp->sctp_ep; 2470 2471 /* setup the base timeout information */ 2472 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2473 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2474 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2475 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2476 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2477 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2478 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2479 /* all max/min max are in ms */ 2480 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2481 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2482 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2483 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2484 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2485 2486 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2487 2488 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2489 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2490 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2491 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2492 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2493 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2494 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2495 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2496 2497 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2498 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2499 /* number of streams to pre-open on a association */ 2500 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2501 2502 /* Add adaptation cookie */ 2503 m->adaptation_layer_indicator = 0x504C5253; 2504 2505 /* seed random number generator */ 2506 m->random_counter = 1; 2507 m->store_at = SCTP_SIGNATURE_SIZE; 2508 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2509 sctp_fill_random_store(m); 2510 2511 /* Minimum cookie size */ 2512 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2513 sizeof(struct sctp_state_cookie); 2514 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2515 2516 /* Setup the initial secret */ 2517 (void)SCTP_GETTIME_TIMEVAL(&time); 2518 m->time_of_secret_change = time.tv_sec; 2519 2520 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2521 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2522 } 2523 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2524 2525 /* How long is a cookie good for ? */ 2526 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2527 /* 2528 * Initialize authentication parameters 2529 */ 2530 m->local_hmacs = sctp_default_supported_hmaclist(); 2531 m->local_auth_chunks = sctp_alloc_chunklist(); 2532 m->default_dscp = 0; 2533 #ifdef INET6 2534 m->default_flowlabel = 0; 2535 #endif 2536 m->port = 0; /* encapsulation disabled by default */ 2537 sctp_auth_set_default_chunks(m->local_auth_chunks); 2538 LIST_INIT(&m->shared_keys); 2539 /* add default NULL key as key id 0 */ 2540 null_key = sctp_alloc_sharedkey(); 2541 sctp_insert_sharedkey(&m->shared_keys, null_key); 2542 SCTP_INP_WUNLOCK(inp); 2543 #ifdef SCTP_LOG_CLOSING 2544 sctp_log_closing(inp, NULL, 12); 2545 #endif 2546 return (error); 2547 } 2548 2549 2550 void 2551 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2552 struct sctp_tcb *stcb) 2553 { 2554 struct sctp_nets *net; 2555 uint16_t lport, rport; 2556 struct sctppcbhead *head; 2557 struct sctp_laddr *laddr, *oladdr; 2558 2559 atomic_add_int(&stcb->asoc.refcnt, 1); 2560 SCTP_TCB_UNLOCK(stcb); 2561 SCTP_INP_INFO_WLOCK(); 2562 SCTP_INP_WLOCK(old_inp); 2563 SCTP_INP_WLOCK(new_inp); 2564 SCTP_TCB_LOCK(stcb); 2565 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2566 2567 new_inp->sctp_ep.time_of_secret_change = 2568 old_inp->sctp_ep.time_of_secret_change; 2569 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2570 sizeof(old_inp->sctp_ep.secret_key)); 2571 new_inp->sctp_ep.current_secret_number = 2572 old_inp->sctp_ep.current_secret_number; 2573 new_inp->sctp_ep.last_secret_number = 2574 old_inp->sctp_ep.last_secret_number; 2575 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2576 2577 /* make it so new data pours into the new socket */ 2578 stcb->sctp_socket = new_inp->sctp_socket; 2579 stcb->sctp_ep = new_inp; 2580 2581 /* Copy the port across */ 2582 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2583 rport = stcb->rport; 2584 /* Pull the tcb from the old association */ 2585 LIST_REMOVE(stcb, sctp_tcbhash); 2586 LIST_REMOVE(stcb, sctp_tcblist); 2587 if (stcb->asoc.in_asocid_hash) { 2588 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2589 } 2590 /* Now insert the new_inp into the TCP connected hash */ 2591 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2592 2593 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2594 /* Its safe to access */ 2595 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2596 2597 /* Now move the tcb into the endpoint list */ 2598 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2599 /* 2600 * Question, do we even need to worry about the ep-hash since we 2601 * only have one connection? Probably not :> so lets get rid of it 2602 * and not suck up any kernel memory in that. 2603 */ 2604 if (stcb->asoc.in_asocid_hash) { 2605 struct sctpasochead *lhd; 2606 2607 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2608 new_inp->hashasocidmark)]; 2609 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2610 } 2611 /* Ok. Let's restart timer. */ 2612 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2613 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2614 stcb, net); 2615 } 2616 2617 SCTP_INP_INFO_WUNLOCK(); 2618 if (new_inp->sctp_tcbhash != NULL) { 2619 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2620 new_inp->sctp_tcbhash = NULL; 2621 } 2622 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2623 /* Subset bound, so copy in the laddr list from the old_inp */ 2624 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2625 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2626 if (laddr == NULL) { 2627 /* 2628 * Gak, what can we do? This assoc is really 2629 * HOSED. We probably should send an abort 2630 * here. 2631 */ 2632 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2633 continue; 2634 } 2635 SCTP_INCR_LADDR_COUNT(); 2636 bzero(laddr, sizeof(*laddr)); 2637 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2638 laddr->ifa = oladdr->ifa; 2639 atomic_add_int(&laddr->ifa->refcount, 1); 2640 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2641 sctp_nxt_addr); 2642 new_inp->laddr_count++; 2643 if (oladdr == stcb->asoc.last_used_address) { 2644 stcb->asoc.last_used_address = laddr; 2645 } 2646 } 2647 } 2648 /* 2649 * Now any running timers need to be adjusted since we really don't 2650 * care if they are running or not just blast in the new_inp into 2651 * all of them. 2652 */ 2653 2654 stcb->asoc.dack_timer.ep = (void *)new_inp; 2655 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2656 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2657 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2658 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2659 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2660 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2661 /* now what about the nets? */ 2662 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2663 net->pmtu_timer.ep = (void *)new_inp; 2664 net->hb_timer.ep = (void *)new_inp; 2665 net->rxt_timer.ep = (void *)new_inp; 2666 } 2667 SCTP_INP_WUNLOCK(new_inp); 2668 SCTP_INP_WUNLOCK(old_inp); 2669 } 2670 2671 2672 2673 2674 /* sctp_ifap is used to bypass normal local address validation checks */ 2675 int 2676 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2677 struct sctp_ifa *sctp_ifap, struct thread *p) 2678 { 2679 /* bind a ep to a socket address */ 2680 struct sctppcbhead *head; 2681 struct sctp_inpcb *inp, *inp_tmp; 2682 struct inpcb *ip_inp; 2683 int port_reuse_active = 0; 2684 int bindall; 2685 uint16_t lport; 2686 int error; 2687 uint32_t vrf_id; 2688 2689 lport = 0; 2690 error = 0; 2691 bindall = 1; 2692 inp = (struct sctp_inpcb *)so->so_pcb; 2693 ip_inp = (struct inpcb *)so->so_pcb; 2694 #ifdef SCTP_DEBUG 2695 if (addr) { 2696 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2697 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2698 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2699 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2700 } 2701 #endif 2702 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2703 /* already did a bind, subsequent binds NOT allowed ! */ 2704 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2705 return (EINVAL); 2706 } 2707 #ifdef INVARIANTS 2708 if (p == NULL) 2709 panic("null proc/thread"); 2710 #endif 2711 if (addr != NULL) { 2712 switch (addr->sa_family) { 2713 #ifdef INET 2714 case AF_INET: 2715 { 2716 struct sockaddr_in *sin; 2717 2718 /* IPV6_V6ONLY socket? */ 2719 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2720 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2721 return (EINVAL); 2722 } 2723 if (addr->sa_len != sizeof(*sin)) { 2724 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2725 return (EINVAL); 2726 } 2727 sin = (struct sockaddr_in *)addr; 2728 lport = sin->sin_port; 2729 /* 2730 * For LOOPBACK the prison_local_ip4() call 2731 * will transmute the ip address to the 2732 * proper value. 2733 */ 2734 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2735 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2736 return (error); 2737 } 2738 if (sin->sin_addr.s_addr != INADDR_ANY) { 2739 bindall = 0; 2740 } 2741 break; 2742 } 2743 #endif 2744 #ifdef INET6 2745 case AF_INET6: 2746 { 2747 /* 2748 * Only for pure IPv6 Address. (No IPv4 2749 * Mapped!) 2750 */ 2751 struct sockaddr_in6 *sin6; 2752 2753 sin6 = (struct sockaddr_in6 *)addr; 2754 2755 if (addr->sa_len != sizeof(*sin6)) { 2756 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2757 return (EINVAL); 2758 } 2759 lport = sin6->sin6_port; 2760 /* 2761 * For LOOPBACK the prison_local_ip6() call 2762 * will transmute the ipv6 address to the 2763 * proper value. 2764 */ 2765 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2766 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2767 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2768 return (error); 2769 } 2770 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2771 bindall = 0; 2772 /* KAME hack: embed scopeid */ 2773 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2774 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2775 return (EINVAL); 2776 } 2777 } 2778 /* this must be cleared for ifa_ifwithaddr() */ 2779 sin6->sin6_scope_id = 0; 2780 break; 2781 } 2782 #endif 2783 default: 2784 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2785 return (EAFNOSUPPORT); 2786 } 2787 } 2788 SCTP_INP_INFO_WLOCK(); 2789 SCTP_INP_WLOCK(inp); 2790 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2791 vrf_id = inp->def_vrf_id; 2792 2793 /* increase our count due to the unlock we do */ 2794 SCTP_INP_INCR_REF(inp); 2795 if (lport) { 2796 /* 2797 * Did the caller specify a port? if so we must see if an ep 2798 * already has this one bound. 2799 */ 2800 /* got to be root to get at low ports */ 2801 if (ntohs(lport) < IPPORT_RESERVED) { 2802 if (p && (error = 2803 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2804 )) { 2805 SCTP_INP_DECR_REF(inp); 2806 SCTP_INP_WUNLOCK(inp); 2807 SCTP_INP_INFO_WUNLOCK(); 2808 return (error); 2809 } 2810 } 2811 if (p == NULL) { 2812 SCTP_INP_DECR_REF(inp); 2813 SCTP_INP_WUNLOCK(inp); 2814 SCTP_INP_INFO_WUNLOCK(); 2815 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2816 return (error); 2817 } 2818 SCTP_INP_WUNLOCK(inp); 2819 if (bindall) { 2820 vrf_id = inp->def_vrf_id; 2821 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2822 if (inp_tmp != NULL) { 2823 /* 2824 * lock guy returned and lower count note 2825 * that we are not bound so inp_tmp should 2826 * NEVER be inp. And it is this inp 2827 * (inp_tmp) that gets the reference bump, 2828 * so we must lower it. 2829 */ 2830 SCTP_INP_DECR_REF(inp_tmp); 2831 /* unlock info */ 2832 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2833 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2834 /* 2835 * Ok, must be one-2-one and 2836 * allowing port re-use 2837 */ 2838 port_reuse_active = 1; 2839 goto continue_anyway; 2840 } 2841 SCTP_INP_DECR_REF(inp); 2842 SCTP_INP_INFO_WUNLOCK(); 2843 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2844 return (EADDRINUSE); 2845 } 2846 } else { 2847 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2848 if (inp_tmp != NULL) { 2849 /* 2850 * lock guy returned and lower count note 2851 * that we are not bound so inp_tmp should 2852 * NEVER be inp. And it is this inp 2853 * (inp_tmp) that gets the reference bump, 2854 * so we must lower it. 2855 */ 2856 SCTP_INP_DECR_REF(inp_tmp); 2857 /* unlock info */ 2858 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2859 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2860 /* 2861 * Ok, must be one-2-one and 2862 * allowing port re-use 2863 */ 2864 port_reuse_active = 1; 2865 goto continue_anyway; 2866 } 2867 SCTP_INP_DECR_REF(inp); 2868 SCTP_INP_INFO_WUNLOCK(); 2869 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2870 return (EADDRINUSE); 2871 } 2872 } 2873 continue_anyway: 2874 SCTP_INP_WLOCK(inp); 2875 if (bindall) { 2876 /* verify that no lport is not used by a singleton */ 2877 if ((port_reuse_active == 0) && 2878 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2879 /* Sorry someone already has this one bound */ 2880 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2881 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2882 port_reuse_active = 1; 2883 } else { 2884 SCTP_INP_DECR_REF(inp); 2885 SCTP_INP_WUNLOCK(inp); 2886 SCTP_INP_INFO_WUNLOCK(); 2887 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2888 return (EADDRINUSE); 2889 } 2890 } 2891 } 2892 } else { 2893 uint16_t first, last, candidate; 2894 uint16_t count; 2895 int done; 2896 2897 if (ip_inp->inp_flags & INP_HIGHPORT) { 2898 first = MODULE_GLOBAL(ipport_hifirstauto); 2899 last = MODULE_GLOBAL(ipport_hilastauto); 2900 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2901 if (p && (error = 2902 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2903 )) { 2904 SCTP_INP_DECR_REF(inp); 2905 SCTP_INP_WUNLOCK(inp); 2906 SCTP_INP_INFO_WUNLOCK(); 2907 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2908 return (error); 2909 } 2910 first = MODULE_GLOBAL(ipport_lowfirstauto); 2911 last = MODULE_GLOBAL(ipport_lowlastauto); 2912 } else { 2913 first = MODULE_GLOBAL(ipport_firstauto); 2914 last = MODULE_GLOBAL(ipport_lastauto); 2915 } 2916 if (first > last) { 2917 uint16_t temp; 2918 2919 temp = first; 2920 first = last; 2921 last = temp; 2922 } 2923 count = last - first + 1; /* number of candidates */ 2924 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2925 2926 done = 0; 2927 while (!done) { 2928 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2929 done = 1; 2930 } 2931 if (!done) { 2932 if (--count == 0) { 2933 SCTP_INP_DECR_REF(inp); 2934 SCTP_INP_WUNLOCK(inp); 2935 SCTP_INP_INFO_WUNLOCK(); 2936 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2937 return (EADDRINUSE); 2938 } 2939 if (candidate == last) 2940 candidate = first; 2941 else 2942 candidate = candidate + 1; 2943 } 2944 } 2945 lport = htons(candidate); 2946 } 2947 SCTP_INP_DECR_REF(inp); 2948 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2949 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2950 /* 2951 * this really should not happen. The guy did a non-blocking 2952 * bind and then did a close at the same time. 2953 */ 2954 SCTP_INP_WUNLOCK(inp); 2955 SCTP_INP_INFO_WUNLOCK(); 2956 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2957 return (EINVAL); 2958 } 2959 /* ok we look clear to give out this port, so lets setup the binding */ 2960 if (bindall) { 2961 /* binding to all addresses, so just set in the proper flags */ 2962 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2963 /* set the automatic addr changes from kernel flag */ 2964 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2965 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2966 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2967 } else { 2968 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2969 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2970 } 2971 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2972 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2973 } else { 2974 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2975 } 2976 /* 2977 * set the automatic mobility_base from kernel flag (by 2978 * micchie) 2979 */ 2980 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 2981 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 2982 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2983 } else { 2984 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 2985 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2986 } 2987 /* 2988 * set the automatic mobility_fasthandoff from kernel flag 2989 * (by micchie) 2990 */ 2991 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 2992 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 2993 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2994 } else { 2995 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 2996 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 2997 } 2998 } else { 2999 /* 3000 * bind specific, make sure flags is off and add a new 3001 * address structure to the sctp_addr_list inside the ep 3002 * structure. 3003 * 3004 * We will need to allocate one and insert it at the head. The 3005 * socketopt call can just insert new addresses in there as 3006 * well. It will also have to do the embed scope kame hack 3007 * too (before adding). 3008 */ 3009 struct sctp_ifa *ifa; 3010 struct sockaddr_storage store_sa; 3011 3012 memset(&store_sa, 0, sizeof(store_sa)); 3013 switch (addr->sa_family) { 3014 #ifdef INET 3015 case AF_INET: 3016 { 3017 struct sockaddr_in *sin; 3018 3019 sin = (struct sockaddr_in *)&store_sa; 3020 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3021 sin->sin_port = 0; 3022 break; 3023 } 3024 #endif 3025 #ifdef INET6 3026 case AF_INET6: 3027 { 3028 struct sockaddr_in6 *sin6; 3029 3030 sin6 = (struct sockaddr_in6 *)&store_sa; 3031 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3032 sin6->sin6_port = 0; 3033 break; 3034 } 3035 #endif 3036 default: 3037 break; 3038 } 3039 /* 3040 * first find the interface with the bound address need to 3041 * zero out the port to find the address! yuck! can't do 3042 * this earlier since need port for sctp_pcb_findep() 3043 */ 3044 if (sctp_ifap != NULL) { 3045 ifa = sctp_ifap; 3046 } else { 3047 /* 3048 * Note for BSD we hit here always other O/S's will 3049 * pass things in via the sctp_ifap argument 3050 * (Panda). 3051 */ 3052 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3053 vrf_id, SCTP_ADDR_NOT_LOCKED); 3054 } 3055 if (ifa == NULL) { 3056 /* Can't find an interface with that address */ 3057 SCTP_INP_WUNLOCK(inp); 3058 SCTP_INP_INFO_WUNLOCK(); 3059 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3060 return (EADDRNOTAVAIL); 3061 } 3062 #ifdef INET6 3063 if (addr->sa_family == AF_INET6) { 3064 /* GAK, more FIXME IFA lock? */ 3065 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3066 /* Can't bind a non-existent addr. */ 3067 SCTP_INP_WUNLOCK(inp); 3068 SCTP_INP_INFO_WUNLOCK(); 3069 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3070 return (EINVAL); 3071 } 3072 } 3073 #endif 3074 /* we're not bound all */ 3075 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3076 /* allow bindx() to send ASCONF's for binding changes */ 3077 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3078 /* clear automatic addr changes from kernel flag */ 3079 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3080 3081 /* add this address to the endpoint list */ 3082 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3083 if (error != 0) { 3084 SCTP_INP_WUNLOCK(inp); 3085 SCTP_INP_INFO_WUNLOCK(); 3086 return (error); 3087 } 3088 inp->laddr_count++; 3089 } 3090 /* find the bucket */ 3091 if (port_reuse_active) { 3092 /* Put it into tcp 1-2-1 hash */ 3093 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3094 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3095 } else { 3096 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3097 } 3098 /* put it in the bucket */ 3099 LIST_INSERT_HEAD(head, inp, sctp_hash); 3100 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3101 (void *)head, ntohs(lport), port_reuse_active); 3102 /* set in the port */ 3103 inp->sctp_lport = lport; 3104 3105 /* turn off just the unbound flag */ 3106 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3107 SCTP_INP_WUNLOCK(inp); 3108 SCTP_INP_INFO_WUNLOCK(); 3109 return (0); 3110 } 3111 3112 3113 static void 3114 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3115 { 3116 struct sctp_iterator *it, *nit; 3117 3118 /* 3119 * We enter with the only the ITERATOR_LOCK in place and a write 3120 * lock on the inp_info stuff. 3121 */ 3122 it = sctp_it_ctl.cur_it; 3123 if (it && (it->vn != curvnet)) { 3124 /* Its not looking at our VNET */ 3125 return; 3126 } 3127 if (it && (it->inp == inp)) { 3128 /* 3129 * This is tricky and we hold the iterator lock, but when it 3130 * returns and gets the lock (when we release it) the 3131 * iterator will try to operate on inp. We need to stop that 3132 * from happening. But of course the iterator has a 3133 * reference on the stcb and inp. We can mark it and it will 3134 * stop. 3135 * 3136 * If its a single iterator situation, we set the end iterator 3137 * flag. Otherwise we set the iterator to go to the next 3138 * inp. 3139 * 3140 */ 3141 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3142 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3143 } else { 3144 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3145 } 3146 } 3147 /* 3148 * Now go through and remove any single reference to our inp that 3149 * may be still pending on the list 3150 */ 3151 SCTP_IPI_ITERATOR_WQ_LOCK(); 3152 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3153 if (it->vn != curvnet) { 3154 continue; 3155 } 3156 if (it->inp == inp) { 3157 /* This one points to me is it inp specific? */ 3158 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3159 /* Remove and free this one */ 3160 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3161 it, sctp_nxt_itr); 3162 if (it->function_atend != NULL) { 3163 (*it->function_atend) (it->pointer, it->val); 3164 } 3165 SCTP_FREE(it, SCTP_M_ITER); 3166 } else { 3167 it->inp = LIST_NEXT(it->inp, sctp_list); 3168 if (it->inp) { 3169 SCTP_INP_INCR_REF(it->inp); 3170 } 3171 } 3172 /* 3173 * When its put in the refcnt is incremented so decr 3174 * it 3175 */ 3176 SCTP_INP_DECR_REF(inp); 3177 } 3178 } 3179 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3180 } 3181 3182 /* release sctp_inpcb unbind the port */ 3183 void 3184 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3185 { 3186 /* 3187 * Here we free a endpoint. We must find it (if it is in the Hash 3188 * table) and remove it from there. Then we must also find it in the 3189 * overall list and remove it from there. After all removals are 3190 * complete then any timer has to be stopped. Then start the actual 3191 * freeing. a) Any local lists. b) Any associations. c) The hash of 3192 * all associations. d) finally the ep itself. 3193 */ 3194 struct sctp_tcb *asoc, *nasoc; 3195 struct sctp_laddr *laddr, *nladdr; 3196 struct inpcb *ip_pcb; 3197 struct socket *so; 3198 int being_refed = 0; 3199 struct sctp_queued_to_read *sq, *nsq; 3200 int cnt; 3201 sctp_sharedkey_t *shared_key, *nshared_key; 3202 3203 3204 #ifdef SCTP_LOG_CLOSING 3205 sctp_log_closing(inp, NULL, 0); 3206 #endif 3207 SCTP_ITERATOR_LOCK(); 3208 /* mark any iterators on the list or being processed */ 3209 sctp_iterator_inp_being_freed(inp); 3210 SCTP_ITERATOR_UNLOCK(); 3211 so = inp->sctp_socket; 3212 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3213 /* been here before.. eeks.. get out of here */ 3214 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3215 #ifdef SCTP_LOG_CLOSING 3216 sctp_log_closing(inp, NULL, 1); 3217 #endif 3218 return; 3219 } 3220 SCTP_ASOC_CREATE_LOCK(inp); 3221 SCTP_INP_INFO_WLOCK(); 3222 3223 SCTP_INP_WLOCK(inp); 3224 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3225 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3226 /* socket is gone, so no more wakeups allowed */ 3227 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3228 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3229 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3230 3231 } 3232 /* First time through we have the socket lock, after that no more. */ 3233 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3234 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3235 3236 if (inp->control) { 3237 sctp_m_freem(inp->control); 3238 inp->control = NULL; 3239 } 3240 if (inp->pkt) { 3241 sctp_m_freem(inp->pkt); 3242 inp->pkt = NULL; 3243 } 3244 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3245 * here but I will be nice :> (i.e. 3246 * ip_pcb = ep;) */ 3247 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3248 int cnt_in_sd; 3249 3250 cnt_in_sd = 0; 3251 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3252 SCTP_TCB_LOCK(asoc); 3253 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3254 /* Skip guys being freed */ 3255 cnt_in_sd++; 3256 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3257 /* 3258 * Special case - we did not start a 3259 * kill timer on the asoc due to it 3260 * was not closed. So go ahead and 3261 * start it now. 3262 */ 3263 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3264 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3265 } 3266 SCTP_TCB_UNLOCK(asoc); 3267 continue; 3268 } 3269 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3270 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3271 (asoc->asoc.total_output_queue_size == 0)) { 3272 /* 3273 * If we have data in queue, we don't want 3274 * to just free since the app may have done, 3275 * send()/close or connect/send/close. And 3276 * it wants the data to get across first. 3277 */ 3278 /* Just abandon things in the front states */ 3279 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3280 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3281 cnt_in_sd++; 3282 } 3283 continue; 3284 } 3285 /* Disconnect the socket please */ 3286 asoc->sctp_socket = NULL; 3287 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3288 if ((asoc->asoc.size_on_reasm_queue > 0) || 3289 (asoc->asoc.control_pdapi) || 3290 (asoc->asoc.size_on_all_streams > 0) || 3291 (so && (so->so_rcv.sb_cc > 0))) { 3292 /* Left with Data unread */ 3293 struct mbuf *op_err; 3294 3295 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3296 0, M_DONTWAIT, 1, MT_DATA); 3297 if (op_err) { 3298 /* Fill in the user initiated abort */ 3299 struct sctp_paramhdr *ph; 3300 uint32_t *ippp; 3301 3302 SCTP_BUF_LEN(op_err) = 3303 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3304 ph = mtod(op_err, 3305 struct sctp_paramhdr *); 3306 ph->param_type = htons( 3307 SCTP_CAUSE_USER_INITIATED_ABT); 3308 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3309 ippp = (uint32_t *) (ph + 1); 3310 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3311 } 3312 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3313 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3314 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3315 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3316 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3317 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3318 } 3319 if (sctp_free_assoc(inp, asoc, 3320 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3321 cnt_in_sd++; 3322 } 3323 continue; 3324 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3325 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3326 (asoc->asoc.stream_queue_cnt == 0) 3327 ) { 3328 if (asoc->asoc.locked_on_sending) { 3329 goto abort_anyway; 3330 } 3331 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3332 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3333 struct sctp_nets *netp; 3334 3335 if (asoc->asoc.alternate) { 3336 netp = asoc->asoc.alternate; 3337 } else { 3338 netp = asoc->asoc.primary_destination; 3339 } 3340 /* 3341 * there is nothing queued to send, 3342 * so I send shutdown 3343 */ 3344 sctp_send_shutdown(asoc, netp); 3345 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3346 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3347 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3348 } 3349 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3350 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3351 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3352 netp); 3353 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3354 asoc->asoc.primary_destination); 3355 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3356 } 3357 } else { 3358 /* mark into shutdown pending */ 3359 struct sctp_stream_queue_pending *sp; 3360 3361 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3362 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3363 asoc->asoc.primary_destination); 3364 if (asoc->asoc.locked_on_sending) { 3365 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3366 sctp_streamhead); 3367 if (sp == NULL) { 3368 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3369 (void *)asoc->asoc.locked_on_sending, 3370 asoc->asoc.locked_on_sending->stream_no); 3371 } else { 3372 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3373 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3374 } 3375 } 3376 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3377 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3378 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3379 struct mbuf *op_err; 3380 3381 abort_anyway: 3382 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3383 0, M_DONTWAIT, 1, MT_DATA); 3384 if (op_err) { 3385 /* 3386 * Fill in the user 3387 * initiated abort 3388 */ 3389 struct sctp_paramhdr *ph; 3390 uint32_t *ippp; 3391 3392 SCTP_BUF_LEN(op_err) = 3393 (sizeof(struct sctp_paramhdr) + 3394 sizeof(uint32_t)); 3395 ph = mtod(op_err, 3396 struct sctp_paramhdr *); 3397 ph->param_type = htons( 3398 SCTP_CAUSE_USER_INITIATED_ABT); 3399 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3400 ippp = (uint32_t *) (ph + 1); 3401 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3402 } 3403 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3404 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3405 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3406 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3407 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3408 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3409 } 3410 if (sctp_free_assoc(inp, asoc, 3411 SCTP_PCBFREE_NOFORCE, 3412 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3413 cnt_in_sd++; 3414 } 3415 continue; 3416 } else { 3417 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3418 } 3419 } 3420 cnt_in_sd++; 3421 SCTP_TCB_UNLOCK(asoc); 3422 } 3423 /* now is there some left in our SHUTDOWN state? */ 3424 if (cnt_in_sd) { 3425 #ifdef SCTP_LOG_CLOSING 3426 sctp_log_closing(inp, NULL, 2); 3427 #endif 3428 inp->sctp_socket = NULL; 3429 SCTP_INP_WUNLOCK(inp); 3430 SCTP_ASOC_CREATE_UNLOCK(inp); 3431 SCTP_INP_INFO_WUNLOCK(); 3432 return; 3433 } 3434 } 3435 inp->sctp_socket = NULL; 3436 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3437 SCTP_PCB_FLAGS_UNBOUND) { 3438 /* 3439 * ok, this guy has been bound. It's port is somewhere in 3440 * the SCTP_BASE_INFO(hash table). Remove it! 3441 */ 3442 LIST_REMOVE(inp, sctp_hash); 3443 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3444 } 3445 /* 3446 * If there is a timer running to kill us, forget it, since it may 3447 * have a contest on the INP lock.. which would cause us to die ... 3448 */ 3449 cnt = 0; 3450 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3451 SCTP_TCB_LOCK(asoc); 3452 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3453 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3454 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3455 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3456 } 3457 cnt++; 3458 SCTP_TCB_UNLOCK(asoc); 3459 continue; 3460 } 3461 /* Free associations that are NOT killing us */ 3462 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3463 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3464 struct mbuf *op_err; 3465 uint32_t *ippp; 3466 3467 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3468 0, M_DONTWAIT, 1, MT_DATA); 3469 if (op_err) { 3470 /* Fill in the user initiated abort */ 3471 struct sctp_paramhdr *ph; 3472 3473 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3474 sizeof(uint32_t)); 3475 ph = mtod(op_err, struct sctp_paramhdr *); 3476 ph->param_type = htons( 3477 SCTP_CAUSE_USER_INITIATED_ABT); 3478 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3479 ippp = (uint32_t *) (ph + 1); 3480 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3481 3482 } 3483 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3484 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3485 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3486 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3487 cnt++; 3488 SCTP_TCB_UNLOCK(asoc); 3489 continue; 3490 } 3491 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3492 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3493 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3494 } 3495 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3496 cnt++; 3497 } 3498 } 3499 if (cnt) { 3500 /* Ok we have someone out there that will kill us */ 3501 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3502 #ifdef SCTP_LOG_CLOSING 3503 sctp_log_closing(inp, NULL, 3); 3504 #endif 3505 SCTP_INP_WUNLOCK(inp); 3506 SCTP_ASOC_CREATE_UNLOCK(inp); 3507 SCTP_INP_INFO_WUNLOCK(); 3508 return; 3509 } 3510 if (SCTP_INP_LOCK_CONTENDED(inp)) 3511 being_refed++; 3512 if (SCTP_INP_READ_CONTENDED(inp)) 3513 being_refed++; 3514 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3515 being_refed++; 3516 3517 if ((inp->refcount) || 3518 (being_refed) || 3519 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3520 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3521 #ifdef SCTP_LOG_CLOSING 3522 sctp_log_closing(inp, NULL, 4); 3523 #endif 3524 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3525 SCTP_INP_WUNLOCK(inp); 3526 SCTP_ASOC_CREATE_UNLOCK(inp); 3527 SCTP_INP_INFO_WUNLOCK(); 3528 return; 3529 } 3530 inp->sctp_ep.signature_change.type = 0; 3531 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3532 /* 3533 * Remove it from the list .. last thing we need a lock for. 3534 */ 3535 LIST_REMOVE(inp, sctp_list); 3536 SCTP_INP_WUNLOCK(inp); 3537 SCTP_ASOC_CREATE_UNLOCK(inp); 3538 SCTP_INP_INFO_WUNLOCK(); 3539 /* 3540 * Now we release all locks. Since this INP cannot be found anymore 3541 * except possibly by the kill timer that might be running. We call 3542 * the drain function here. It should hit the case were it sees the 3543 * ACTIVE flag cleared and exit out freeing us to proceed and 3544 * destroy everything. 3545 */ 3546 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3547 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3548 } else { 3549 /* Probably un-needed */ 3550 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3551 } 3552 3553 #ifdef SCTP_LOG_CLOSING 3554 sctp_log_closing(inp, NULL, 5); 3555 #endif 3556 3557 3558 if ((inp->sctp_asocidhash) != NULL) { 3559 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3560 inp->sctp_asocidhash = NULL; 3561 } 3562 /* sa_ignore FREED_MEMORY */ 3563 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3564 /* Its only abandoned if it had data left */ 3565 if (sq->length) 3566 SCTP_STAT_INCR(sctps_left_abandon); 3567 3568 TAILQ_REMOVE(&inp->read_queue, sq, next); 3569 sctp_free_remote_addr(sq->whoFrom); 3570 if (so) 3571 so->so_rcv.sb_cc -= sq->length; 3572 if (sq->data) { 3573 sctp_m_freem(sq->data); 3574 sq->data = NULL; 3575 } 3576 /* 3577 * no need to free the net count, since at this point all 3578 * assoc's are gone. 3579 */ 3580 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3581 SCTP_DECR_READQ_COUNT(); 3582 } 3583 /* Now the sctp_pcb things */ 3584 /* 3585 * free each asoc if it is not already closed/free. we can't use the 3586 * macro here since le_next will get freed as part of the 3587 * sctp_free_assoc() call. 3588 */ 3589 if (so) { 3590 #ifdef IPSEC 3591 ipsec_delete_pcbpolicy(ip_pcb); 3592 #endif /* IPSEC */ 3593 3594 /* Unlocks not needed since the socket is gone now */ 3595 } 3596 if (ip_pcb->inp_options) { 3597 (void)sctp_m_free(ip_pcb->inp_options); 3598 ip_pcb->inp_options = 0; 3599 } 3600 #ifdef INET6 3601 if (ip_pcb->inp_vflag & INP_IPV6) { 3602 struct in6pcb *in6p; 3603 3604 in6p = (struct in6pcb *)inp; 3605 ip6_freepcbopts(in6p->in6p_outputopts); 3606 } 3607 #endif /* INET6 */ 3608 ip_pcb->inp_vflag = 0; 3609 /* free up authentication fields */ 3610 if (inp->sctp_ep.local_auth_chunks != NULL) 3611 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3612 if (inp->sctp_ep.local_hmacs != NULL) 3613 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3614 3615 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3616 LIST_REMOVE(shared_key, next); 3617 sctp_free_sharedkey(shared_key); 3618 /* sa_ignore FREED_MEMORY */ 3619 } 3620 3621 /* 3622 * if we have an address list the following will free the list of 3623 * ifaddr's that are set into this ep. Again macro limitations here, 3624 * since the LIST_FOREACH could be a bad idea. 3625 */ 3626 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3627 sctp_remove_laddr(laddr); 3628 } 3629 3630 #ifdef SCTP_TRACK_FREED_ASOCS 3631 /* TEMP CODE */ 3632 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3633 LIST_REMOVE(asoc, sctp_tcblist); 3634 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3635 SCTP_DECR_ASOC_COUNT(); 3636 } 3637 /* *** END TEMP CODE *** */ 3638 #endif 3639 /* Now lets see about freeing the EP hash table. */ 3640 if (inp->sctp_tcbhash != NULL) { 3641 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3642 inp->sctp_tcbhash = NULL; 3643 } 3644 /* Now we must put the ep memory back into the zone pool */ 3645 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3646 SCTP_INP_LOCK_DESTROY(inp); 3647 SCTP_INP_READ_DESTROY(inp); 3648 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3649 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3650 SCTP_DECR_EP_COUNT(); 3651 } 3652 3653 3654 struct sctp_nets * 3655 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3656 { 3657 struct sctp_nets *net; 3658 3659 /* locate the address */ 3660 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3661 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3662 return (net); 3663 } 3664 return (NULL); 3665 } 3666 3667 3668 int 3669 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3670 { 3671 struct sctp_ifa *sctp_ifa; 3672 3673 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3674 if (sctp_ifa) { 3675 return (1); 3676 } else { 3677 return (0); 3678 } 3679 } 3680 3681 /* 3682 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3683 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3684 * stats of stuff. 3685 */ 3686 int 3687 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3688 struct sctp_nets **netp, int set_scope, int from) 3689 { 3690 /* 3691 * The following is redundant to the same lines in the 3692 * sctp_aloc_assoc() but is needed since others call the add address 3693 * function 3694 */ 3695 struct sctp_nets *net, *netfirst; 3696 int addr_inscope; 3697 3698 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3699 from); 3700 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3701 3702 netfirst = sctp_findnet(stcb, newaddr); 3703 if (netfirst) { 3704 /* 3705 * Lie and return ok, we don't want to make the association 3706 * go away for this behavior. It will happen in the TCP 3707 * model in a connected socket. It does not reach the hash 3708 * table until after the association is built so it can't be 3709 * found. Mark as reachable, since the initial creation will 3710 * have been cleared and the NOT_IN_ASSOC flag will have 3711 * been added... and we don't want to end up removing it 3712 * back out. 3713 */ 3714 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3715 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3716 SCTP_ADDR_UNCONFIRMED); 3717 } else { 3718 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3719 } 3720 3721 return (0); 3722 } 3723 addr_inscope = 1; 3724 switch (newaddr->sa_family) { 3725 #ifdef INET 3726 case AF_INET: 3727 { 3728 struct sockaddr_in *sin; 3729 3730 sin = (struct sockaddr_in *)newaddr; 3731 if (sin->sin_addr.s_addr == 0) { 3732 /* Invalid address */ 3733 return (-1); 3734 } 3735 /* zero out the bzero area */ 3736 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3737 3738 /* assure len is set */ 3739 sin->sin_len = sizeof(struct sockaddr_in); 3740 if (set_scope) { 3741 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3742 stcb->ipv4_local_scope = 1; 3743 #else 3744 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3745 stcb->asoc.ipv4_local_scope = 1; 3746 } 3747 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3748 } else { 3749 /* Validate the address is in scope */ 3750 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3751 (stcb->asoc.ipv4_local_scope == 0)) { 3752 addr_inscope = 0; 3753 } 3754 } 3755 break; 3756 } 3757 #endif 3758 #ifdef INET6 3759 case AF_INET6: 3760 { 3761 struct sockaddr_in6 *sin6; 3762 3763 sin6 = (struct sockaddr_in6 *)newaddr; 3764 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3765 /* Invalid address */ 3766 return (-1); 3767 } 3768 /* assure len is set */ 3769 sin6->sin6_len = sizeof(struct sockaddr_in6); 3770 if (set_scope) { 3771 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3772 stcb->asoc.loopback_scope = 1; 3773 stcb->asoc.local_scope = 0; 3774 stcb->asoc.ipv4_local_scope = 1; 3775 stcb->asoc.site_scope = 1; 3776 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3777 /* 3778 * If the new destination is a 3779 * LINK_LOCAL we must have common 3780 * site scope. Don't set the local 3781 * scope since we may not share all 3782 * links, only loopback can do this. 3783 * Links on the local network would 3784 * also be on our private network 3785 * for v4 too. 3786 */ 3787 stcb->asoc.ipv4_local_scope = 1; 3788 stcb->asoc.site_scope = 1; 3789 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3790 /* 3791 * If the new destination is 3792 * SITE_LOCAL then we must have site 3793 * scope in common. 3794 */ 3795 stcb->asoc.site_scope = 1; 3796 } 3797 } else { 3798 /* Validate the address is in scope */ 3799 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3800 (stcb->asoc.loopback_scope == 0)) { 3801 addr_inscope = 0; 3802 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3803 (stcb->asoc.local_scope == 0)) { 3804 addr_inscope = 0; 3805 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3806 (stcb->asoc.site_scope == 0)) { 3807 addr_inscope = 0; 3808 } 3809 } 3810 break; 3811 } 3812 #endif 3813 default: 3814 /* not supported family type */ 3815 return (-1); 3816 } 3817 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3818 if (net == NULL) { 3819 return (-1); 3820 } 3821 SCTP_INCR_RADDR_COUNT(); 3822 bzero(net, sizeof(struct sctp_nets)); 3823 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3824 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3825 switch (newaddr->sa_family) { 3826 #ifdef INET 3827 case AF_INET: 3828 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3829 break; 3830 #endif 3831 #ifdef INET6 3832 case AF_INET6: 3833 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3834 break; 3835 #endif 3836 default: 3837 break; 3838 } 3839 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3840 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3841 stcb->asoc.loopback_scope = 1; 3842 stcb->asoc.ipv4_local_scope = 1; 3843 stcb->asoc.local_scope = 0; 3844 stcb->asoc.site_scope = 1; 3845 addr_inscope = 1; 3846 } 3847 net->failure_threshold = stcb->asoc.def_net_failure; 3848 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3849 if (addr_inscope == 0) { 3850 net->dest_state = (SCTP_ADDR_REACHABLE | 3851 SCTP_ADDR_OUT_OF_SCOPE); 3852 } else { 3853 if (from == SCTP_ADDR_IS_CONFIRMED) 3854 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3855 net->dest_state = SCTP_ADDR_REACHABLE; 3856 else 3857 net->dest_state = SCTP_ADDR_REACHABLE | 3858 SCTP_ADDR_UNCONFIRMED; 3859 } 3860 /* 3861 * We set this to 0, the timer code knows that this means its an 3862 * initial value 3863 */ 3864 net->rto_needed = 1; 3865 net->RTO = 0; 3866 net->RTO_measured = 0; 3867 stcb->asoc.numnets++; 3868 net->ref_count = 1; 3869 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3870 net->port = stcb->asoc.port; 3871 net->dscp = stcb->asoc.default_dscp; 3872 #ifdef INET6 3873 net->flowlabel = stcb->asoc.default_flowlabel; 3874 #endif 3875 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3876 net->dest_state |= SCTP_ADDR_NOHB; 3877 } else { 3878 net->dest_state &= ~SCTP_ADDR_NOHB; 3879 } 3880 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3881 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3882 } else { 3883 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3884 } 3885 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3886 /* Init the timer structure */ 3887 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3888 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3889 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3890 3891 /* Now generate a route for this guy */ 3892 #ifdef INET6 3893 /* KAME hack: embed scopeid */ 3894 if (newaddr->sa_family == AF_INET6) { 3895 struct sockaddr_in6 *sin6; 3896 3897 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3898 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3899 sin6->sin6_scope_id = 0; 3900 } 3901 #endif 3902 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3903 3904 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3905 /* Get source address */ 3906 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3907 stcb, 3908 (sctp_route_t *) & net->ro, 3909 net, 3910 0, 3911 stcb->asoc.vrf_id); 3912 /* Now get the interface MTU */ 3913 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3914 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3915 } 3916 if (net->mtu > 0) { 3917 uint32_t rmtu; 3918 3919 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3920 if (rmtu == 0) { 3921 /* 3922 * Start things off to match mtu of 3923 * interface please. 3924 */ 3925 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3926 net->ro.ro_rt, net->mtu); 3927 } else { 3928 /* 3929 * we take the route mtu over the interface, 3930 * since the route may be leading out the 3931 * loopback, or a different interface. 3932 */ 3933 net->mtu = rmtu; 3934 } 3935 } 3936 } 3937 if (net->mtu == 0) { 3938 switch (newaddr->sa_family) { 3939 #ifdef INET 3940 case AF_INET: 3941 net->mtu = SCTP_DEFAULT_MTU; 3942 break; 3943 #endif 3944 #ifdef INET6 3945 case AF_INET6: 3946 net->mtu = 1280; 3947 break; 3948 #endif 3949 default: 3950 break; 3951 } 3952 } 3953 if (net->port) { 3954 net->mtu -= (uint32_t) sizeof(struct udphdr); 3955 } 3956 if (from == SCTP_ALLOC_ASOC) { 3957 stcb->asoc.smallest_mtu = net->mtu; 3958 } 3959 if (stcb->asoc.smallest_mtu > net->mtu) { 3960 stcb->asoc.smallest_mtu = net->mtu; 3961 } 3962 #ifdef INET6 3963 if (newaddr->sa_family == AF_INET6) { 3964 struct sockaddr_in6 *sin6; 3965 3966 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3967 (void)sa6_recoverscope(sin6); 3968 } 3969 #endif 3970 3971 /* JRS - Use the congestion control given in the CC module */ 3972 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 3973 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 3974 3975 /* 3976 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3977 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3978 */ 3979 net->find_pseudo_cumack = 1; 3980 net->find_rtx_pseudo_cumack = 1; 3981 net->src_addr_selected = 0; 3982 /* Choose an initial flowid. */ 3983 net->flowid = stcb->asoc.my_vtag ^ 3984 ntohs(stcb->rport) ^ 3985 ntohs(stcb->sctp_ep->sctp_lport); 3986 #ifdef INVARIANTS 3987 net->flowidset = 1; 3988 #endif 3989 if (netp) { 3990 *netp = net; 3991 } 3992 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3993 if (net->ro.ro_rt == NULL) { 3994 /* Since we have no route put it at the back */ 3995 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3996 } else if (netfirst == NULL) { 3997 /* We are the first one in the pool. */ 3998 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3999 } else if (netfirst->ro.ro_rt == NULL) { 4000 /* 4001 * First one has NO route. Place this one ahead of the first 4002 * one. 4003 */ 4004 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4005 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4006 /* 4007 * This one has a different interface than the one at the 4008 * top of the list. Place it ahead. 4009 */ 4010 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4011 } else { 4012 /* 4013 * Ok we have the same interface as the first one. Move 4014 * forward until we find either a) one with a NULL route... 4015 * insert ahead of that b) one with a different ifp.. insert 4016 * after that. c) end of the list.. insert at the tail. 4017 */ 4018 struct sctp_nets *netlook; 4019 4020 do { 4021 netlook = TAILQ_NEXT(netfirst, sctp_next); 4022 if (netlook == NULL) { 4023 /* End of the list */ 4024 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4025 break; 4026 } else if (netlook->ro.ro_rt == NULL) { 4027 /* next one has NO route */ 4028 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4029 break; 4030 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4031 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4032 net, sctp_next); 4033 break; 4034 } 4035 /* Shift forward */ 4036 netfirst = netlook; 4037 } while (netlook != NULL); 4038 } 4039 4040 /* got to have a primary set */ 4041 if (stcb->asoc.primary_destination == 0) { 4042 stcb->asoc.primary_destination = net; 4043 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4044 (net->ro.ro_rt) && 4045 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4046 /* No route to current primary adopt new primary */ 4047 stcb->asoc.primary_destination = net; 4048 } 4049 /* Validate primary is first */ 4050 net = TAILQ_FIRST(&stcb->asoc.nets); 4051 if ((net != stcb->asoc.primary_destination) && 4052 (stcb->asoc.primary_destination)) { 4053 /* 4054 * first one on the list is NOT the primary sctp_cmpaddr() 4055 * is much more efficient if the primary is the first on the 4056 * list, make it so. 4057 */ 4058 TAILQ_REMOVE(&stcb->asoc.nets, 4059 stcb->asoc.primary_destination, sctp_next); 4060 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4061 stcb->asoc.primary_destination, sctp_next); 4062 } 4063 return (0); 4064 } 4065 4066 4067 static uint32_t 4068 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4069 { 4070 uint32_t id; 4071 struct sctpasochead *head; 4072 struct sctp_tcb *lstcb; 4073 4074 SCTP_INP_WLOCK(inp); 4075 try_again: 4076 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4077 /* TSNH */ 4078 SCTP_INP_WUNLOCK(inp); 4079 return (0); 4080 } 4081 /* 4082 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4083 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4084 */ 4085 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4086 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4087 } 4088 id = inp->sctp_associd_counter; 4089 inp->sctp_associd_counter++; 4090 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4091 if (lstcb) { 4092 goto try_again; 4093 } 4094 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4095 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4096 stcb->asoc.in_asocid_hash = 1; 4097 SCTP_INP_WUNLOCK(inp); 4098 return id; 4099 } 4100 4101 /* 4102 * allocate an association and add it to the endpoint. The caller must be 4103 * careful to add all additional addresses once they are know right away or 4104 * else the assoc will be may experience a blackout scenario. 4105 */ 4106 struct sctp_tcb * 4107 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4108 int *error, uint32_t override_tag, uint32_t vrf_id, 4109 struct thread *p 4110 ) 4111 { 4112 /* note the p argument is only valid in unbound sockets */ 4113 4114 struct sctp_tcb *stcb; 4115 struct sctp_association *asoc; 4116 struct sctpasochead *head; 4117 uint16_t rport; 4118 int err; 4119 4120 /* 4121 * Assumption made here: Caller has done a 4122 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4123 * address does not exist already. 4124 */ 4125 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4126 /* Hit max assoc, sorry no more */ 4127 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4128 *error = ENOBUFS; 4129 return (NULL); 4130 } 4131 if (firstaddr == NULL) { 4132 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4133 *error = EINVAL; 4134 return (NULL); 4135 } 4136 SCTP_INP_RLOCK(inp); 4137 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4138 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4139 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4140 /* 4141 * If its in the TCP pool, its NOT allowed to create an 4142 * association. The parent listener needs to call 4143 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4144 * off, or connected one does this.. its an error. 4145 */ 4146 SCTP_INP_RUNLOCK(inp); 4147 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4148 *error = EINVAL; 4149 return (NULL); 4150 } 4151 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4152 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4153 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4154 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4155 SCTP_INP_RUNLOCK(inp); 4156 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4157 *error = EINVAL; 4158 return (NULL); 4159 } 4160 } 4161 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4162 #ifdef SCTP_DEBUG 4163 if (firstaddr) { 4164 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4165 switch (firstaddr->sa_family) { 4166 #ifdef INET 4167 case AF_INET: 4168 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4169 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4170 break; 4171 #endif 4172 #ifdef INET6 4173 case AF_INET6: 4174 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4175 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4176 break; 4177 #endif 4178 default: 4179 break; 4180 } 4181 } else { 4182 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4183 } 4184 #endif /* SCTP_DEBUG */ 4185 switch (firstaddr->sa_family) { 4186 #ifdef INET 4187 case AF_INET: 4188 { 4189 struct sockaddr_in *sin; 4190 4191 sin = (struct sockaddr_in *)firstaddr; 4192 if ((ntohs(sin->sin_port) == 0) || 4193 (sin->sin_addr.s_addr == INADDR_ANY) || 4194 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4195 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4196 /* Invalid address */ 4197 SCTP_INP_RUNLOCK(inp); 4198 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4199 *error = EINVAL; 4200 return (NULL); 4201 } 4202 rport = sin->sin_port; 4203 break; 4204 } 4205 #endif 4206 #ifdef INET6 4207 case AF_INET6: 4208 { 4209 struct sockaddr_in6 *sin6; 4210 4211 sin6 = (struct sockaddr_in6 *)firstaddr; 4212 if ((ntohs(sin6->sin6_port) == 0) || 4213 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4214 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4215 /* Invalid address */ 4216 SCTP_INP_RUNLOCK(inp); 4217 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4218 *error = EINVAL; 4219 return (NULL); 4220 } 4221 rport = sin6->sin6_port; 4222 break; 4223 } 4224 #endif 4225 default: 4226 /* not supported family type */ 4227 SCTP_INP_RUNLOCK(inp); 4228 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4229 *error = EINVAL; 4230 return (NULL); 4231 } 4232 SCTP_INP_RUNLOCK(inp); 4233 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4234 /* 4235 * If you have not performed a bind, then we need to do the 4236 * ephemeral bind for you. 4237 */ 4238 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4239 (struct sockaddr *)NULL, 4240 (struct sctp_ifa *)NULL, 4241 p 4242 ))) { 4243 /* bind error, probably perm */ 4244 *error = err; 4245 return (NULL); 4246 } 4247 } 4248 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4249 if (stcb == NULL) { 4250 /* out of memory? */ 4251 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4252 *error = ENOMEM; 4253 return (NULL); 4254 } 4255 SCTP_INCR_ASOC_COUNT(); 4256 4257 bzero(stcb, sizeof(*stcb)); 4258 asoc = &stcb->asoc; 4259 4260 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4261 SCTP_TCB_LOCK_INIT(stcb); 4262 SCTP_TCB_SEND_LOCK_INIT(stcb); 4263 stcb->rport = rport; 4264 /* setup back pointer's */ 4265 stcb->sctp_ep = inp; 4266 stcb->sctp_socket = inp->sctp_socket; 4267 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4268 /* failed */ 4269 SCTP_TCB_LOCK_DESTROY(stcb); 4270 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4271 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4272 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4273 SCTP_DECR_ASOC_COUNT(); 4274 *error = err; 4275 return (NULL); 4276 } 4277 /* and the port */ 4278 SCTP_INP_INFO_WLOCK(); 4279 SCTP_INP_WLOCK(inp); 4280 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4281 /* inpcb freed while alloc going on */ 4282 SCTP_TCB_LOCK_DESTROY(stcb); 4283 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4284 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4285 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4286 SCTP_INP_WUNLOCK(inp); 4287 SCTP_INP_INFO_WUNLOCK(); 4288 SCTP_DECR_ASOC_COUNT(); 4289 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4290 *error = EINVAL; 4291 return (NULL); 4292 } 4293 SCTP_TCB_LOCK(stcb); 4294 4295 /* now that my_vtag is set, add it to the hash */ 4296 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4297 /* put it in the bucket in the vtag hash of assoc's for the system */ 4298 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4299 SCTP_INP_INFO_WUNLOCK(); 4300 4301 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4302 /* failure.. memory error? */ 4303 if (asoc->strmout) { 4304 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4305 asoc->strmout = NULL; 4306 } 4307 if (asoc->mapping_array) { 4308 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4309 asoc->mapping_array = NULL; 4310 } 4311 if (asoc->nr_mapping_array) { 4312 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4313 asoc->nr_mapping_array = NULL; 4314 } 4315 SCTP_DECR_ASOC_COUNT(); 4316 SCTP_TCB_LOCK_DESTROY(stcb); 4317 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4318 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4319 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4320 SCTP_INP_WUNLOCK(inp); 4321 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4322 *error = ENOBUFS; 4323 return (NULL); 4324 } 4325 /* Init all the timers */ 4326 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4327 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4328 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4329 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4330 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4331 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4332 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4333 4334 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4335 /* now file the port under the hash as well */ 4336 if (inp->sctp_tcbhash != NULL) { 4337 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4338 inp->sctp_hashmark)]; 4339 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4340 } 4341 SCTP_INP_WUNLOCK(inp); 4342 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4343 return (stcb); 4344 } 4345 4346 4347 void 4348 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4349 { 4350 struct sctp_association *asoc; 4351 4352 asoc = &stcb->asoc; 4353 asoc->numnets--; 4354 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4355 if (net == asoc->primary_destination) { 4356 /* Reset primary */ 4357 struct sctp_nets *lnet; 4358 4359 lnet = TAILQ_FIRST(&asoc->nets); 4360 /* 4361 * Mobility adaptation Ideally, if deleted destination is 4362 * the primary, it becomes a fast retransmission trigger by 4363 * the subsequent SET PRIMARY. (by micchie) 4364 */ 4365 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4366 SCTP_MOBILITY_BASE) || 4367 sctp_is_mobility_feature_on(stcb->sctp_ep, 4368 SCTP_MOBILITY_FASTHANDOFF)) { 4369 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4370 if (asoc->deleted_primary != NULL) { 4371 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4372 goto out; 4373 } 4374 asoc->deleted_primary = net; 4375 atomic_add_int(&net->ref_count, 1); 4376 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4377 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4378 sctp_mobility_feature_on(stcb->sctp_ep, 4379 SCTP_MOBILITY_PRIM_DELETED); 4380 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4381 stcb->sctp_ep, stcb, NULL); 4382 } 4383 out: 4384 /* Try to find a confirmed primary */ 4385 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4386 } 4387 if (net == asoc->last_data_chunk_from) { 4388 /* Reset primary */ 4389 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4390 } 4391 if (net == asoc->last_control_chunk_from) { 4392 /* Clear net */ 4393 asoc->last_control_chunk_from = NULL; 4394 } 4395 if (net == stcb->asoc.alternate) { 4396 sctp_free_remote_addr(stcb->asoc.alternate); 4397 stcb->asoc.alternate = NULL; 4398 } 4399 sctp_free_remote_addr(net); 4400 } 4401 4402 /* 4403 * remove a remote endpoint address from an association, it will fail if the 4404 * address does not exist. 4405 */ 4406 int 4407 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4408 { 4409 /* 4410 * Here we need to remove a remote address. This is quite simple, we 4411 * first find it in the list of address for the association 4412 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4413 * on that item. Note we do not allow it to be removed if there are 4414 * no other addresses. 4415 */ 4416 struct sctp_association *asoc; 4417 struct sctp_nets *net, *nnet; 4418 4419 asoc = &stcb->asoc; 4420 4421 /* locate the address */ 4422 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4423 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4424 continue; 4425 } 4426 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4427 remaddr)) { 4428 /* we found the guy */ 4429 if (asoc->numnets < 2) { 4430 /* Must have at LEAST two remote addresses */ 4431 return (-1); 4432 } else { 4433 sctp_remove_net(stcb, net); 4434 return (0); 4435 } 4436 } 4437 } 4438 /* not found. */ 4439 return (-2); 4440 } 4441 4442 void 4443 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4444 { 4445 struct sctpvtaghead *chain; 4446 struct sctp_tagblock *twait_block; 4447 int found = 0; 4448 int i; 4449 4450 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4451 if (!LIST_EMPTY(chain)) { 4452 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4453 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4454 if ((twait_block->vtag_block[i].v_tag == tag) && 4455 (twait_block->vtag_block[i].lport == lport) && 4456 (twait_block->vtag_block[i].rport == rport)) { 4457 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4458 twait_block->vtag_block[i].v_tag = 0; 4459 twait_block->vtag_block[i].lport = 0; 4460 twait_block->vtag_block[i].rport = 0; 4461 found = 1; 4462 break; 4463 } 4464 } 4465 if (found) 4466 break; 4467 } 4468 } 4469 } 4470 4471 int 4472 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4473 { 4474 struct sctpvtaghead *chain; 4475 struct sctp_tagblock *twait_block; 4476 int found = 0; 4477 int i; 4478 4479 SCTP_INP_INFO_WLOCK(); 4480 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4481 if (!LIST_EMPTY(chain)) { 4482 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4483 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4484 if ((twait_block->vtag_block[i].v_tag == tag) && 4485 (twait_block->vtag_block[i].lport == lport) && 4486 (twait_block->vtag_block[i].rport == rport)) { 4487 found = 1; 4488 break; 4489 } 4490 } 4491 if (found) 4492 break; 4493 } 4494 } 4495 SCTP_INP_INFO_WUNLOCK(); 4496 return (found); 4497 } 4498 4499 4500 void 4501 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4502 { 4503 struct sctpvtaghead *chain; 4504 struct sctp_tagblock *twait_block; 4505 struct timeval now; 4506 int set, i; 4507 4508 if (time == 0) { 4509 /* Its disabled */ 4510 return; 4511 } 4512 (void)SCTP_GETTIME_TIMEVAL(&now); 4513 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4514 set = 0; 4515 if (!LIST_EMPTY(chain)) { 4516 /* Block(s) present, lets find space, and expire on the fly */ 4517 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4518 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4519 if ((twait_block->vtag_block[i].v_tag == 0) && 4520 !set) { 4521 twait_block->vtag_block[i].tv_sec_at_expire = 4522 now.tv_sec + time; 4523 twait_block->vtag_block[i].v_tag = tag; 4524 twait_block->vtag_block[i].lport = lport; 4525 twait_block->vtag_block[i].rport = rport; 4526 set = 1; 4527 } else if ((twait_block->vtag_block[i].v_tag) && 4528 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4529 /* Audit expires this guy */ 4530 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4531 twait_block->vtag_block[i].v_tag = 0; 4532 twait_block->vtag_block[i].lport = 0; 4533 twait_block->vtag_block[i].rport = 0; 4534 if (set == 0) { 4535 /* Reuse it for my new tag */ 4536 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4537 twait_block->vtag_block[i].v_tag = tag; 4538 twait_block->vtag_block[i].lport = lport; 4539 twait_block->vtag_block[i].rport = rport; 4540 set = 1; 4541 } 4542 } 4543 } 4544 if (set) { 4545 /* 4546 * We only do up to the block where we can 4547 * place our tag for audits 4548 */ 4549 break; 4550 } 4551 } 4552 } 4553 /* Need to add a new block to chain */ 4554 if (!set) { 4555 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4556 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4557 if (twait_block == NULL) { 4558 #ifdef INVARIANTS 4559 panic("Can not alloc tagblock"); 4560 #endif 4561 return; 4562 } 4563 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4564 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4565 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4566 twait_block->vtag_block[0].v_tag = tag; 4567 twait_block->vtag_block[0].lport = lport; 4568 twait_block->vtag_block[0].rport = rport; 4569 } 4570 } 4571 4572 4573 4574 /*- 4575 * Free the association after un-hashing the remote port. This 4576 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4577 * expect that the input to this function IS a locked TCB. 4578 * It will return 0, if it did NOT destroy the association (instead 4579 * it unlocks it. It will return NON-zero if it either destroyed the 4580 * association OR the association is already destroyed. 4581 */ 4582 int 4583 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4584 { 4585 int i; 4586 struct sctp_association *asoc; 4587 struct sctp_nets *net, *nnet; 4588 struct sctp_laddr *laddr, *naddr; 4589 struct sctp_tmit_chunk *chk, *nchk; 4590 struct sctp_asconf_addr *aparam, *naparam; 4591 struct sctp_asconf_ack *aack, *naack; 4592 struct sctp_stream_reset_list *strrst, *nstrrst; 4593 struct sctp_queued_to_read *sq, *nsq; 4594 struct sctp_stream_queue_pending *sp, *nsp; 4595 sctp_sharedkey_t *shared_key, *nshared_key; 4596 struct socket *so; 4597 4598 /* first, lets purge the entry from the hash table. */ 4599 4600 #ifdef SCTP_LOG_CLOSING 4601 sctp_log_closing(inp, stcb, 6); 4602 #endif 4603 if (stcb->asoc.state == 0) { 4604 #ifdef SCTP_LOG_CLOSING 4605 sctp_log_closing(inp, NULL, 7); 4606 #endif 4607 /* there is no asoc, really TSNH :-0 */ 4608 return (1); 4609 } 4610 if (stcb->asoc.alternate) { 4611 sctp_free_remote_addr(stcb->asoc.alternate); 4612 stcb->asoc.alternate = NULL; 4613 } 4614 /* TEMP CODE */ 4615 if (stcb->freed_from_where == 0) { 4616 /* Only record the first place free happened from */ 4617 stcb->freed_from_where = from_location; 4618 } 4619 /* TEMP CODE */ 4620 4621 asoc = &stcb->asoc; 4622 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4623 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4624 /* nothing around */ 4625 so = NULL; 4626 else 4627 so = inp->sctp_socket; 4628 4629 /* 4630 * We used timer based freeing if a reader or writer is in the way. 4631 * So we first check if we are actually being called from a timer, 4632 * if so we abort early if a reader or writer is still in the way. 4633 */ 4634 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4635 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4636 /* 4637 * is it the timer driving us? if so are the reader/writers 4638 * gone? 4639 */ 4640 if (stcb->asoc.refcnt) { 4641 /* nope, reader or writer in the way */ 4642 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4643 /* no asoc destroyed */ 4644 SCTP_TCB_UNLOCK(stcb); 4645 #ifdef SCTP_LOG_CLOSING 4646 sctp_log_closing(inp, stcb, 8); 4647 #endif 4648 return (0); 4649 } 4650 } 4651 /* now clean up any other timers */ 4652 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4653 asoc->dack_timer.self = NULL; 4654 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4655 /*- 4656 * For stream reset we don't blast this unless 4657 * it is a str-reset timer, it might be the 4658 * free-asoc timer which we DON'T want to 4659 * disturb. 4660 */ 4661 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4662 asoc->strreset_timer.self = NULL; 4663 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4664 asoc->asconf_timer.self = NULL; 4665 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4666 asoc->autoclose_timer.self = NULL; 4667 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4668 asoc->shut_guard_timer.self = NULL; 4669 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4670 asoc->delayed_event_timer.self = NULL; 4671 /* Mobility adaptation */ 4672 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4673 asoc->delete_prim_timer.self = NULL; 4674 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4675 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4676 net->rxt_timer.self = NULL; 4677 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4678 net->pmtu_timer.self = NULL; 4679 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4680 net->hb_timer.self = NULL; 4681 } 4682 /* Now the read queue needs to be cleaned up (only once) */ 4683 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4684 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4685 SCTP_INP_READ_LOCK(inp); 4686 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4687 if (sq->stcb == stcb) { 4688 sq->do_not_ref_stcb = 1; 4689 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4690 /* 4691 * If there is no end, there never will be 4692 * now. 4693 */ 4694 if (sq->end_added == 0) { 4695 /* Held for PD-API clear that. */ 4696 sq->pdapi_aborted = 1; 4697 sq->held_length = 0; 4698 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4699 /* 4700 * Need to add a PD-API 4701 * aborted indication. 4702 * Setting the control_pdapi 4703 * assures that it will be 4704 * added right after this 4705 * msg. 4706 */ 4707 uint32_t strseq; 4708 4709 stcb->asoc.control_pdapi = sq; 4710 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4711 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4712 stcb, 4713 SCTP_PARTIAL_DELIVERY_ABORTED, 4714 (void *)&strseq, 4715 SCTP_SO_LOCKED); 4716 stcb->asoc.control_pdapi = NULL; 4717 } 4718 } 4719 /* Add an end to wake them */ 4720 sq->end_added = 1; 4721 } 4722 } 4723 SCTP_INP_READ_UNLOCK(inp); 4724 if (stcb->block_entry) { 4725 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4726 stcb->block_entry->error = ECONNRESET; 4727 stcb->block_entry = NULL; 4728 } 4729 } 4730 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4731 /* 4732 * Someone holds a reference OR the socket is unaccepted 4733 * yet. 4734 */ 4735 if ((stcb->asoc.refcnt) || 4736 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4737 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4738 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4739 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4740 } 4741 SCTP_TCB_UNLOCK(stcb); 4742 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4743 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4744 /* nothing around */ 4745 so = NULL; 4746 if (so) { 4747 /* Wake any reader/writers */ 4748 sctp_sorwakeup(inp, so); 4749 sctp_sowwakeup(inp, so); 4750 } 4751 #ifdef SCTP_LOG_CLOSING 4752 sctp_log_closing(inp, stcb, 9); 4753 #endif 4754 /* no asoc destroyed */ 4755 return (0); 4756 } 4757 #ifdef SCTP_LOG_CLOSING 4758 sctp_log_closing(inp, stcb, 10); 4759 #endif 4760 /* 4761 * When I reach here, no others want to kill the assoc yet.. and I 4762 * own the lock. Now its possible an abort comes in when I do the 4763 * lock exchange below to grab all the locks to do the final take 4764 * out. to prevent this we increment the count, which will start a 4765 * timer and blow out above thus assuring us that we hold exclusive 4766 * killing of the asoc. Note that after getting back the TCB lock we 4767 * will go ahead and increment the counter back up and stop any 4768 * timer a passing stranger may have started :-S 4769 */ 4770 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4771 atomic_add_int(&stcb->asoc.refcnt, 1); 4772 4773 SCTP_TCB_UNLOCK(stcb); 4774 SCTP_INP_INFO_WLOCK(); 4775 SCTP_INP_WLOCK(inp); 4776 SCTP_TCB_LOCK(stcb); 4777 } 4778 /* Double check the GONE flag */ 4779 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4780 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4781 /* nothing around */ 4782 so = NULL; 4783 4784 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4785 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4786 /* 4787 * For TCP type we need special handling when we are 4788 * connected. We also include the peel'ed off ones to. 4789 */ 4790 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4791 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4792 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4793 if (so) { 4794 SOCK_LOCK(so); 4795 if (so->so_rcv.sb_cc == 0) { 4796 so->so_state &= ~(SS_ISCONNECTING | 4797 SS_ISDISCONNECTING | 4798 SS_ISCONFIRMING | 4799 SS_ISCONNECTED); 4800 } 4801 socantrcvmore_locked(so); 4802 sctp_sowwakeup(inp, so); 4803 sctp_sorwakeup(inp, so); 4804 SCTP_SOWAKEUP(so); 4805 } 4806 } 4807 } 4808 /* 4809 * Make it invalid too, that way if its about to run it will abort 4810 * and return. 4811 */ 4812 /* re-increment the lock */ 4813 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4814 atomic_add_int(&stcb->asoc.refcnt, -1); 4815 } 4816 if (stcb->asoc.refcnt) { 4817 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4818 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4819 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4820 SCTP_INP_INFO_WUNLOCK(); 4821 SCTP_INP_WUNLOCK(inp); 4822 } 4823 SCTP_TCB_UNLOCK(stcb); 4824 return (0); 4825 } 4826 asoc->state = 0; 4827 if (inp->sctp_tcbhash) { 4828 LIST_REMOVE(stcb, sctp_tcbhash); 4829 } 4830 if (stcb->asoc.in_asocid_hash) { 4831 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4832 } 4833 /* Now lets remove it from the list of ALL associations in the EP */ 4834 LIST_REMOVE(stcb, sctp_tcblist); 4835 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4836 SCTP_INP_INCR_REF(inp); 4837 SCTP_INP_WUNLOCK(inp); 4838 } 4839 /* pull from vtag hash */ 4840 LIST_REMOVE(stcb, sctp_asocs); 4841 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4842 inp->sctp_lport, stcb->rport); 4843 4844 /* 4845 * Now restop the timers to be sure this is paranoia at is finest! 4846 */ 4847 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4848 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4849 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4850 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4851 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4852 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4853 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4854 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4855 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4856 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4857 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4858 } 4859 4860 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4861 /* 4862 * The chunk lists and such SHOULD be empty but we check them just 4863 * in case. 4864 */ 4865 /* anything on the wheel needs to be removed */ 4866 for (i = 0; i < asoc->streamoutcnt; i++) { 4867 struct sctp_stream_out *outs; 4868 4869 outs = &asoc->strmout[i]; 4870 /* now clean up any chunks here */ 4871 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4872 TAILQ_REMOVE(&outs->outqueue, sp, next); 4873 sctp_free_spbufspace(stcb, asoc, sp); 4874 if (sp->data) { 4875 if (so) { 4876 /* Still an open socket - report */ 4877 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4878 0, (void *)sp, SCTP_SO_LOCKED); 4879 } 4880 if (sp->data) { 4881 sctp_m_freem(sp->data); 4882 sp->data = NULL; 4883 sp->tail_mbuf = NULL; 4884 sp->length = 0; 4885 } 4886 } 4887 if (sp->net) { 4888 sctp_free_remote_addr(sp->net); 4889 sp->net = NULL; 4890 } 4891 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4892 } 4893 } 4894 /* sa_ignore FREED_MEMORY */ 4895 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4896 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4897 SCTP_FREE(strrst, SCTP_M_STRESET); 4898 } 4899 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4900 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4901 if (sq->data) { 4902 sctp_m_freem(sq->data); 4903 sq->data = NULL; 4904 } 4905 sctp_free_remote_addr(sq->whoFrom); 4906 sq->whoFrom = NULL; 4907 sq->stcb = NULL; 4908 /* Free the ctl entry */ 4909 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4910 SCTP_DECR_READQ_COUNT(); 4911 /* sa_ignore FREED_MEMORY */ 4912 } 4913 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4914 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4915 if (chk->data) { 4916 sctp_m_freem(chk->data); 4917 chk->data = NULL; 4918 } 4919 if (chk->holds_key_ref) 4920 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4921 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4922 SCTP_DECR_CHK_COUNT(); 4923 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4924 asoc->free_chunk_cnt--; 4925 /* sa_ignore FREED_MEMORY */ 4926 } 4927 /* pending send queue SHOULD be empty */ 4928 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4929 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4930 if (chk->data) { 4931 if (so) { 4932 /* Still a socket? */ 4933 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4934 0, chk, SCTP_SO_LOCKED); 4935 } 4936 if (chk->data) { 4937 sctp_m_freem(chk->data); 4938 chk->data = NULL; 4939 } 4940 } 4941 if (chk->holds_key_ref) 4942 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4943 if (chk->whoTo) { 4944 sctp_free_remote_addr(chk->whoTo); 4945 chk->whoTo = NULL; 4946 } 4947 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4948 SCTP_DECR_CHK_COUNT(); 4949 /* sa_ignore FREED_MEMORY */ 4950 } 4951 /* sent queue SHOULD be empty */ 4952 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4953 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4954 if (chk->data) { 4955 if (so) { 4956 /* Still a socket? */ 4957 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 4958 0, chk, SCTP_SO_LOCKED); 4959 } 4960 if (chk->data) { 4961 sctp_m_freem(chk->data); 4962 chk->data = NULL; 4963 } 4964 } 4965 if (chk->holds_key_ref) 4966 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4967 sctp_free_remote_addr(chk->whoTo); 4968 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4969 SCTP_DECR_CHK_COUNT(); 4970 /* sa_ignore FREED_MEMORY */ 4971 } 4972 /* control queue MAY not be empty */ 4973 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 4974 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4975 if (chk->data) { 4976 sctp_m_freem(chk->data); 4977 chk->data = NULL; 4978 } 4979 if (chk->holds_key_ref) 4980 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4981 sctp_free_remote_addr(chk->whoTo); 4982 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4983 SCTP_DECR_CHK_COUNT(); 4984 /* sa_ignore FREED_MEMORY */ 4985 } 4986 /* ASCONF queue MAY not be empty */ 4987 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 4988 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4989 if (chk->data) { 4990 sctp_m_freem(chk->data); 4991 chk->data = NULL; 4992 } 4993 if (chk->holds_key_ref) 4994 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4995 sctp_free_remote_addr(chk->whoTo); 4996 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4997 SCTP_DECR_CHK_COUNT(); 4998 /* sa_ignore FREED_MEMORY */ 4999 } 5000 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5001 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5002 if (chk->data) { 5003 sctp_m_freem(chk->data); 5004 chk->data = NULL; 5005 } 5006 if (chk->holds_key_ref) 5007 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5008 sctp_free_remote_addr(chk->whoTo); 5009 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5010 SCTP_DECR_CHK_COUNT(); 5011 /* sa_ignore FREED_MEMORY */ 5012 } 5013 5014 if (asoc->mapping_array) { 5015 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5016 asoc->mapping_array = NULL; 5017 } 5018 if (asoc->nr_mapping_array) { 5019 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5020 asoc->nr_mapping_array = NULL; 5021 } 5022 /* the stream outs */ 5023 if (asoc->strmout) { 5024 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5025 asoc->strmout = NULL; 5026 } 5027 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5028 if (asoc->strmin) { 5029 struct sctp_queued_to_read *ctl, *nctl; 5030 5031 for (i = 0; i < asoc->streamincnt; i++) { 5032 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5033 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5034 sctp_free_remote_addr(ctl->whoFrom); 5035 if (ctl->data) { 5036 sctp_m_freem(ctl->data); 5037 ctl->data = NULL; 5038 } 5039 /* 5040 * We don't free the address here since all 5041 * the net's were freed above. 5042 */ 5043 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5044 SCTP_DECR_READQ_COUNT(); 5045 } 5046 } 5047 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5048 asoc->strmin = NULL; 5049 } 5050 asoc->streamincnt = 0; 5051 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5052 #ifdef INVARIANTS 5053 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5054 panic("no net's left alloc'ed, or list points to itself"); 5055 } 5056 #endif 5057 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5058 sctp_free_remote_addr(net); 5059 } 5060 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5061 /* sa_ignore FREED_MEMORY */ 5062 sctp_remove_laddr(laddr); 5063 } 5064 5065 /* pending asconf (address) parameters */ 5066 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5067 /* sa_ignore FREED_MEMORY */ 5068 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5069 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5070 } 5071 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5072 /* sa_ignore FREED_MEMORY */ 5073 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5074 if (aack->data != NULL) { 5075 sctp_m_freem(aack->data); 5076 } 5077 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5078 } 5079 /* clean up auth stuff */ 5080 if (asoc->local_hmacs) 5081 sctp_free_hmaclist(asoc->local_hmacs); 5082 if (asoc->peer_hmacs) 5083 sctp_free_hmaclist(asoc->peer_hmacs); 5084 5085 if (asoc->local_auth_chunks) 5086 sctp_free_chunklist(asoc->local_auth_chunks); 5087 if (asoc->peer_auth_chunks) 5088 sctp_free_chunklist(asoc->peer_auth_chunks); 5089 5090 sctp_free_authinfo(&asoc->authinfo); 5091 5092 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5093 LIST_REMOVE(shared_key, next); 5094 sctp_free_sharedkey(shared_key); 5095 /* sa_ignore FREED_MEMORY */ 5096 } 5097 5098 /* Insert new items here :> */ 5099 5100 /* Get rid of LOCK */ 5101 SCTP_TCB_LOCK_DESTROY(stcb); 5102 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5103 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5104 SCTP_INP_INFO_WUNLOCK(); 5105 SCTP_INP_RLOCK(inp); 5106 } 5107 #ifdef SCTP_TRACK_FREED_ASOCS 5108 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5109 /* now clean up the tasoc itself */ 5110 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5111 SCTP_DECR_ASOC_COUNT(); 5112 } else { 5113 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5114 } 5115 #else 5116 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5117 SCTP_DECR_ASOC_COUNT(); 5118 #endif 5119 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5120 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5121 /* 5122 * If its NOT the inp_free calling us AND sctp_close 5123 * as been called, we call back... 5124 */ 5125 SCTP_INP_RUNLOCK(inp); 5126 /* 5127 * This will start the kill timer (if we are the 5128 * last one) since we hold an increment yet. But 5129 * this is the only safe way to do this since 5130 * otherwise if the socket closes at the same time 5131 * we are here we might collide in the cleanup. 5132 */ 5133 sctp_inpcb_free(inp, 5134 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5135 SCTP_CALLED_DIRECTLY_NOCMPSET); 5136 SCTP_INP_DECR_REF(inp); 5137 goto out_of; 5138 } else { 5139 /* The socket is still open. */ 5140 SCTP_INP_DECR_REF(inp); 5141 } 5142 } 5143 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5144 SCTP_INP_RUNLOCK(inp); 5145 } 5146 out_of: 5147 /* destroyed the asoc */ 5148 #ifdef SCTP_LOG_CLOSING 5149 sctp_log_closing(inp, NULL, 11); 5150 #endif 5151 return (1); 5152 } 5153 5154 5155 5156 /* 5157 * determine if a destination is "reachable" based upon the addresses bound 5158 * to the current endpoint (e.g. only v4 or v6 currently bound) 5159 */ 5160 /* 5161 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5162 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5163 * types bound as its endpoint 5164 */ 5165 int 5166 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5167 { 5168 struct sctp_inpcb *inp; 5169 int answer; 5170 5171 /* 5172 * No locks here, the TCB, in all cases is already locked and an 5173 * assoc is up. There is either a INP lock by the caller applied (in 5174 * asconf case when deleting an address) or NOT in the HB case, 5175 * however if HB then the INP increment is up and the INP will not 5176 * be removed (on top of the fact that we have a TCB lock). So we 5177 * only want to read the sctp_flags, which is either bound-all or 5178 * not.. no protection needed since once an assoc is up you can't be 5179 * changing your binding. 5180 */ 5181 inp = stcb->sctp_ep; 5182 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5183 /* if bound all, destination is not restricted */ 5184 /* 5185 * RRS: Question during lock work: Is this correct? If you 5186 * are bound-all you still might need to obey the V4--V6 5187 * flags??? IMO this bound-all stuff needs to be removed! 5188 */ 5189 return (1); 5190 } 5191 /* NOTE: all "scope" checks are done when local addresses are added */ 5192 switch (destaddr->sa_family) { 5193 #ifdef INET6 5194 case AF_INET6: 5195 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5196 break; 5197 #endif 5198 #ifdef INET 5199 case AF_INET: 5200 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5201 break; 5202 #endif 5203 default: 5204 /* invalid family, so it's unreachable */ 5205 answer = 0; 5206 break; 5207 } 5208 return (answer); 5209 } 5210 5211 /* 5212 * update the inp_vflags on an endpoint 5213 */ 5214 static void 5215 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5216 { 5217 struct sctp_laddr *laddr; 5218 5219 /* first clear the flag */ 5220 inp->ip_inp.inp.inp_vflag = 0; 5221 /* set the flag based on addresses on the ep list */ 5222 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5223 if (laddr->ifa == NULL) { 5224 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5225 __FUNCTION__); 5226 continue; 5227 } 5228 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5229 continue; 5230 } 5231 switch (laddr->ifa->address.sa.sa_family) { 5232 #ifdef INET6 5233 case AF_INET6: 5234 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5235 break; 5236 #endif 5237 #ifdef INET 5238 case AF_INET: 5239 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5240 break; 5241 #endif 5242 default: 5243 break; 5244 } 5245 } 5246 } 5247 5248 /* 5249 * Add the address to the endpoint local address list There is nothing to be 5250 * done if we are bound to all addresses 5251 */ 5252 void 5253 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5254 { 5255 struct sctp_laddr *laddr; 5256 int fnd, error = 0; 5257 5258 fnd = 0; 5259 5260 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5261 /* You are already bound to all. You have it already */ 5262 return; 5263 } 5264 #ifdef INET6 5265 if (ifa->address.sa.sa_family == AF_INET6) { 5266 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5267 /* Can't bind a non-useable addr. */ 5268 return; 5269 } 5270 } 5271 #endif 5272 /* first, is it already present? */ 5273 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5274 if (laddr->ifa == ifa) { 5275 fnd = 1; 5276 break; 5277 } 5278 } 5279 5280 if (fnd == 0) { 5281 /* Not in the ep list */ 5282 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5283 if (error != 0) 5284 return; 5285 inp->laddr_count++; 5286 /* update inp_vflag flags */ 5287 switch (ifa->address.sa.sa_family) { 5288 #ifdef INET6 5289 case AF_INET6: 5290 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5291 break; 5292 #endif 5293 #ifdef INET 5294 case AF_INET: 5295 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5296 break; 5297 #endif 5298 default: 5299 break; 5300 } 5301 } 5302 return; 5303 } 5304 5305 5306 /* 5307 * select a new (hopefully reachable) destination net (should only be used 5308 * when we deleted an ep addr that is the only usable source address to reach 5309 * the destination net) 5310 */ 5311 static void 5312 sctp_select_primary_destination(struct sctp_tcb *stcb) 5313 { 5314 struct sctp_nets *net; 5315 5316 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5317 /* for now, we'll just pick the first reachable one we find */ 5318 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5319 continue; 5320 if (sctp_destination_is_reachable(stcb, 5321 (struct sockaddr *)&net->ro._l_addr)) { 5322 /* found a reachable destination */ 5323 stcb->asoc.primary_destination = net; 5324 } 5325 } 5326 /* I can't there from here! ...we're gonna die shortly... */ 5327 } 5328 5329 5330 /* 5331 * Delete the address from the endpoint local address list There is nothing 5332 * to be done if we are bound to all addresses 5333 */ 5334 void 5335 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5336 { 5337 struct sctp_laddr *laddr; 5338 int fnd; 5339 5340 fnd = 0; 5341 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5342 /* You are already bound to all. You have it already */ 5343 return; 5344 } 5345 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5346 if (laddr->ifa == ifa) { 5347 fnd = 1; 5348 break; 5349 } 5350 } 5351 if (fnd && (inp->laddr_count < 2)) { 5352 /* can't delete unless there are at LEAST 2 addresses */ 5353 return; 5354 } 5355 if (fnd) { 5356 /* 5357 * clean up any use of this address go through our 5358 * associations and clear any last_used_address that match 5359 * this one for each assoc, see if a new primary_destination 5360 * is needed 5361 */ 5362 struct sctp_tcb *stcb; 5363 5364 /* clean up "next_addr_touse" */ 5365 if (inp->next_addr_touse == laddr) 5366 /* delete this address */ 5367 inp->next_addr_touse = NULL; 5368 5369 /* clean up "last_used_address" */ 5370 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5371 struct sctp_nets *net; 5372 5373 SCTP_TCB_LOCK(stcb); 5374 if (stcb->asoc.last_used_address == laddr) 5375 /* delete this address */ 5376 stcb->asoc.last_used_address = NULL; 5377 /* 5378 * Now spin through all the nets and purge any ref 5379 * to laddr 5380 */ 5381 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5382 if (net->ro._s_addr && 5383 (net->ro._s_addr->ifa == laddr->ifa)) { 5384 /* Yep, purge src address selected */ 5385 sctp_rtentry_t *rt; 5386 5387 /* delete this address if cached */ 5388 rt = net->ro.ro_rt; 5389 if (rt != NULL) { 5390 RTFREE(rt); 5391 net->ro.ro_rt = NULL; 5392 } 5393 sctp_free_ifa(net->ro._s_addr); 5394 net->ro._s_addr = NULL; 5395 net->src_addr_selected = 0; 5396 } 5397 } 5398 SCTP_TCB_UNLOCK(stcb); 5399 } /* for each tcb */ 5400 /* remove it from the ep list */ 5401 sctp_remove_laddr(laddr); 5402 inp->laddr_count--; 5403 /* update inp_vflag flags */ 5404 sctp_update_ep_vflag(inp); 5405 } 5406 return; 5407 } 5408 5409 /* 5410 * Add the address to the TCB local address restricted list. 5411 * This is a "pending" address list (eg. addresses waiting for an 5412 * ASCONF-ACK response) and cannot be used as a valid source address. 5413 */ 5414 void 5415 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5416 { 5417 struct sctp_laddr *laddr; 5418 struct sctpladdr *list; 5419 5420 /* 5421 * Assumes TCB is locked.. and possibly the INP. May need to 5422 * confirm/fix that if we need it and is not the case. 5423 */ 5424 list = &stcb->asoc.sctp_restricted_addrs; 5425 5426 #ifdef INET6 5427 if (ifa->address.sa.sa_family == AF_INET6) { 5428 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5429 /* Can't bind a non-existent addr. */ 5430 return; 5431 } 5432 } 5433 #endif 5434 /* does the address already exist? */ 5435 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5436 if (laddr->ifa == ifa) { 5437 return; 5438 } 5439 } 5440 5441 /* add to the list */ 5442 (void)sctp_insert_laddr(list, ifa, 0); 5443 return; 5444 } 5445 5446 /* 5447 * insert an laddr entry with the given ifa for the desired list 5448 */ 5449 int 5450 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5451 { 5452 struct sctp_laddr *laddr; 5453 5454 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5455 if (laddr == NULL) { 5456 /* out of memory? */ 5457 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5458 return (EINVAL); 5459 } 5460 SCTP_INCR_LADDR_COUNT(); 5461 bzero(laddr, sizeof(*laddr)); 5462 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5463 laddr->ifa = ifa; 5464 laddr->action = act; 5465 atomic_add_int(&ifa->refcount, 1); 5466 /* insert it */ 5467 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5468 5469 return (0); 5470 } 5471 5472 /* 5473 * Remove an laddr entry from the local address list (on an assoc) 5474 */ 5475 void 5476 sctp_remove_laddr(struct sctp_laddr *laddr) 5477 { 5478 5479 /* remove from the list */ 5480 LIST_REMOVE(laddr, sctp_nxt_addr); 5481 sctp_free_ifa(laddr->ifa); 5482 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5483 SCTP_DECR_LADDR_COUNT(); 5484 } 5485 5486 /* 5487 * Remove a local address from the TCB local address restricted list 5488 */ 5489 void 5490 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5491 { 5492 struct sctp_inpcb *inp; 5493 struct sctp_laddr *laddr; 5494 5495 /* 5496 * This is called by asconf work. It is assumed that a) The TCB is 5497 * locked and b) The INP is locked. This is true in as much as I can 5498 * trace through the entry asconf code where I did these locks. 5499 * Again, the ASCONF code is a bit different in that it does lock 5500 * the INP during its work often times. This must be since we don't 5501 * want other proc's looking up things while what they are looking 5502 * up is changing :-D 5503 */ 5504 5505 inp = stcb->sctp_ep; 5506 /* if subset bound and don't allow ASCONF's, can't delete last */ 5507 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5508 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5509 if (stcb->sctp_ep->laddr_count < 2) { 5510 /* can't delete last address */ 5511 return; 5512 } 5513 } 5514 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5515 /* remove the address if it exists */ 5516 if (laddr->ifa == NULL) 5517 continue; 5518 if (laddr->ifa == ifa) { 5519 sctp_remove_laddr(laddr); 5520 return; 5521 } 5522 } 5523 5524 /* address not found! */ 5525 return; 5526 } 5527 5528 /* 5529 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5530 */ 5531 /* sysctl */ 5532 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5533 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5534 5535 5536 5537 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5538 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5539 int *sctp_cpuarry = NULL; 5540 void 5541 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5542 { 5543 /* Queue a packet to a processor for the specified core */ 5544 struct sctp_mcore_queue *qent; 5545 struct sctp_mcore_ctrl *wkq; 5546 int need_wake = 0; 5547 5548 if (sctp_mcore_workers == NULL) { 5549 /* Something went way bad during setup */ 5550 sctp_input_with_port(m, off, 0); 5551 return; 5552 } 5553 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5554 (sizeof(struct sctp_mcore_queue)), 5555 SCTP_M_MCORE); 5556 if (qent == NULL) { 5557 /* This is trouble */ 5558 sctp_input_with_port(m, off, 0); 5559 return; 5560 } 5561 qent->vn = curvnet; 5562 qent->m = m; 5563 qent->off = off; 5564 qent->v6 = 0; 5565 wkq = &sctp_mcore_workers[cpu_to_use]; 5566 SCTP_MCORE_QLOCK(wkq); 5567 5568 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5569 if (wkq->running == 0) { 5570 need_wake = 1; 5571 } 5572 SCTP_MCORE_QUNLOCK(wkq); 5573 if (need_wake) { 5574 wakeup(&wkq->running); 5575 } 5576 } 5577 5578 static void 5579 sctp_mcore_thread(void *arg) 5580 { 5581 5582 struct sctp_mcore_ctrl *wkq; 5583 struct sctp_mcore_queue *qent; 5584 5585 wkq = (struct sctp_mcore_ctrl *)arg; 5586 struct mbuf *m; 5587 int off, v6; 5588 5589 /* Wait for first tickle */ 5590 SCTP_MCORE_LOCK(wkq); 5591 wkq->running = 0; 5592 msleep(&wkq->running, 5593 &wkq->core_mtx, 5594 0, "wait for pkt", 0); 5595 SCTP_MCORE_UNLOCK(wkq); 5596 5597 /* Bind to our cpu */ 5598 thread_lock(curthread); 5599 sched_bind(curthread, wkq->cpuid); 5600 thread_unlock(curthread); 5601 5602 /* Now lets start working */ 5603 SCTP_MCORE_LOCK(wkq); 5604 /* Now grab lock and go */ 5605 for (;;) { 5606 SCTP_MCORE_QLOCK(wkq); 5607 skip_sleep: 5608 wkq->running = 1; 5609 qent = TAILQ_FIRST(&wkq->que); 5610 if (qent) { 5611 TAILQ_REMOVE(&wkq->que, qent, next); 5612 SCTP_MCORE_QUNLOCK(wkq); 5613 CURVNET_SET(qent->vn); 5614 m = qent->m; 5615 off = qent->off; 5616 v6 = qent->v6; 5617 SCTP_FREE(qent, SCTP_M_MCORE); 5618 if (v6 == 0) { 5619 sctp_input_with_port(m, off, 0); 5620 } else { 5621 SCTP_PRINTF("V6 not yet supported\n"); 5622 sctp_m_freem(m); 5623 } 5624 CURVNET_RESTORE(); 5625 SCTP_MCORE_QLOCK(wkq); 5626 } 5627 wkq->running = 0; 5628 if (!TAILQ_EMPTY(&wkq->que)) { 5629 goto skip_sleep; 5630 } 5631 SCTP_MCORE_QUNLOCK(wkq); 5632 msleep(&wkq->running, 5633 &wkq->core_mtx, 5634 0, "wait for pkt", 0); 5635 } 5636 } 5637 5638 static void 5639 sctp_startup_mcore_threads(void) 5640 { 5641 int i, cpu; 5642 5643 if (mp_ncpus == 1) 5644 return; 5645 5646 if (sctp_mcore_workers != NULL) { 5647 /* 5648 * Already been here in some previous vnet? 5649 */ 5650 return; 5651 } 5652 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5653 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5654 SCTP_M_MCORE); 5655 if (sctp_mcore_workers == NULL) { 5656 /* TSNH I hope */ 5657 return; 5658 } 5659 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5660 sizeof(struct sctp_mcore_ctrl))); 5661 /* Init the structures */ 5662 for (i = 0; i <= mp_maxid; i++) { 5663 TAILQ_INIT(&sctp_mcore_workers[i].que); 5664 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5665 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5666 sctp_mcore_workers[i].cpuid = i; 5667 } 5668 if (sctp_cpuarry == NULL) { 5669 SCTP_MALLOC(sctp_cpuarry, int *, 5670 (mp_ncpus * sizeof(int)), 5671 SCTP_M_MCORE); 5672 i = 0; 5673 CPU_FOREACH(cpu) { 5674 sctp_cpuarry[i] = cpu; 5675 i++; 5676 } 5677 } 5678 /* Now start them all */ 5679 CPU_FOREACH(cpu) { 5680 (void)kproc_create(sctp_mcore_thread, 5681 (void *)&sctp_mcore_workers[cpu], 5682 &sctp_mcore_workers[cpu].thread_proc, 5683 RFPROC, 5684 SCTP_KTHREAD_PAGES, 5685 SCTP_MCORE_NAME); 5686 5687 } 5688 } 5689 5690 #endif 5691 5692 void 5693 sctp_pcb_init() 5694 { 5695 /* 5696 * SCTP initialization for the PCB structures should be called by 5697 * the sctp_init() funciton. 5698 */ 5699 int i; 5700 struct timeval tv; 5701 5702 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5703 /* error I was called twice */ 5704 return; 5705 } 5706 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5707 5708 #if defined(SCTP_LOCAL_TRACE_BUF) 5709 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5710 #endif 5711 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5712 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5713 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5714 SCTP_M_MCORE); 5715 #endif 5716 (void)SCTP_GETTIME_TIMEVAL(&tv); 5717 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5718 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5719 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5720 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5721 #else 5722 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5723 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5724 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5725 #endif 5726 /* init the empty list of (All) Endpoints */ 5727 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5728 5729 5730 /* init the hash table of endpoints */ 5731 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5732 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5733 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5734 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5735 &SCTP_BASE_INFO(hashasocmark)); 5736 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5737 &SCTP_BASE_INFO(hashmark)); 5738 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5739 &SCTP_BASE_INFO(hashtcpmark)); 5740 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5741 5742 5743 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5744 &SCTP_BASE_INFO(hashvrfmark)); 5745 5746 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5747 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5748 /* init the zones */ 5749 /* 5750 * FIX ME: Should check for NULL returns, but if it does fail we are 5751 * doomed to panic anyways... add later maybe. 5752 */ 5753 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5754 sizeof(struct sctp_inpcb), maxsockets); 5755 5756 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5757 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5758 5759 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5760 sizeof(struct sctp_laddr), 5761 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5762 5763 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5764 sizeof(struct sctp_nets), 5765 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5766 5767 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5768 sizeof(struct sctp_tmit_chunk), 5769 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5770 5771 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5772 sizeof(struct sctp_queued_to_read), 5773 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5774 5775 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5776 sizeof(struct sctp_stream_queue_pending), 5777 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5778 5779 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5780 sizeof(struct sctp_asconf), 5781 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5782 5783 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5784 sizeof(struct sctp_asconf_ack), 5785 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5786 5787 5788 /* Master Lock INIT for info structure */ 5789 SCTP_INP_INFO_LOCK_INIT(); 5790 SCTP_STATLOG_INIT_LOCK(); 5791 5792 SCTP_IPI_COUNT_INIT(); 5793 SCTP_IPI_ADDR_INIT(); 5794 #ifdef SCTP_PACKET_LOGGING 5795 SCTP_IP_PKTLOG_INIT(); 5796 #endif 5797 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5798 5799 SCTP_WQ_ADDR_INIT(); 5800 /* not sure if we need all the counts */ 5801 SCTP_BASE_INFO(ipi_count_ep) = 0; 5802 /* assoc/tcb zone info */ 5803 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5804 /* local addrlist zone info */ 5805 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5806 /* remote addrlist zone info */ 5807 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5808 /* chunk info */ 5809 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5810 5811 /* socket queue zone info */ 5812 SCTP_BASE_INFO(ipi_count_readq) = 0; 5813 5814 /* stream out queue cont */ 5815 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5816 5817 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5818 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5819 5820 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5821 5822 /* Init the TIMEWAIT list */ 5823 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5824 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5825 } 5826 5827 sctp_startup_iterator(); 5828 5829 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5830 sctp_startup_mcore_threads(); 5831 #endif 5832 5833 /* 5834 * INIT the default VRF which for BSD is the only one, other O/S's 5835 * may have more. But initially they must start with one and then 5836 * add the VRF's as addresses are added. 5837 */ 5838 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5839 } 5840 5841 /* 5842 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5843 */ 5844 void 5845 sctp_pcb_finish(void) 5846 { 5847 struct sctp_vrflist *vrf_bucket; 5848 struct sctp_vrf *vrf, *nvrf; 5849 struct sctp_ifn *ifn, *nifn; 5850 struct sctp_ifa *ifa, *nifa; 5851 struct sctpvtaghead *chain; 5852 struct sctp_tagblock *twait_block, *prev_twait_block; 5853 struct sctp_laddr *wi, *nwi; 5854 int i; 5855 5856 /* 5857 * Free BSD the it thread never exits but we do clean up. The only 5858 * way freebsd reaches here if we have VRF's but we still add the 5859 * ifdef to make it compile on old versions. 5860 */ 5861 { 5862 struct sctp_iterator *it, *nit; 5863 5864 SCTP_IPI_ITERATOR_WQ_LOCK(); 5865 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5866 if (it->vn != curvnet) { 5867 continue; 5868 } 5869 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5870 if (it->function_atend != NULL) { 5871 (*it->function_atend) (it->pointer, it->val); 5872 } 5873 SCTP_FREE(it, SCTP_M_ITER); 5874 } 5875 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5876 SCTP_ITERATOR_LOCK(); 5877 if ((sctp_it_ctl.cur_it) && 5878 (sctp_it_ctl.cur_it->vn == curvnet)) { 5879 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5880 } 5881 SCTP_ITERATOR_UNLOCK(); 5882 } 5883 5884 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5885 SCTP_WQ_ADDR_LOCK(); 5886 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5887 LIST_REMOVE(wi, sctp_nxt_addr); 5888 SCTP_DECR_LADDR_COUNT(); 5889 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5890 } 5891 SCTP_WQ_ADDR_UNLOCK(); 5892 5893 /* 5894 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5895 * destroyed first). 5896 */ 5897 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5898 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5899 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5900 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5901 /* free the ifa */ 5902 LIST_REMOVE(ifa, next_bucket); 5903 LIST_REMOVE(ifa, next_ifa); 5904 SCTP_FREE(ifa, SCTP_M_IFA); 5905 } 5906 /* free the ifn */ 5907 LIST_REMOVE(ifn, next_bucket); 5908 LIST_REMOVE(ifn, next_ifn); 5909 SCTP_FREE(ifn, SCTP_M_IFN); 5910 } 5911 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5912 /* free the vrf */ 5913 LIST_REMOVE(vrf, next_vrf); 5914 SCTP_FREE(vrf, SCTP_M_VRF); 5915 } 5916 /* free the vrf hashes */ 5917 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5918 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5919 5920 /* 5921 * free the TIMEWAIT list elements malloc'd in the function 5922 * sctp_add_vtag_to_timewait()... 5923 */ 5924 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5925 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5926 if (!LIST_EMPTY(chain)) { 5927 prev_twait_block = NULL; 5928 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5929 if (prev_twait_block) { 5930 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5931 } 5932 prev_twait_block = twait_block; 5933 } 5934 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5935 } 5936 } 5937 5938 /* free the locks and mutexes */ 5939 #ifdef SCTP_PACKET_LOGGING 5940 SCTP_IP_PKTLOG_DESTROY(); 5941 #endif 5942 SCTP_IPI_ADDR_DESTROY(); 5943 SCTP_STATLOG_DESTROY(); 5944 SCTP_INP_INFO_LOCK_DESTROY(); 5945 5946 SCTP_WQ_ADDR_DESTROY(); 5947 5948 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5949 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5950 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5951 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5952 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5953 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5954 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5955 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5956 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5957 /* Get rid of other stuff to */ 5958 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5959 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5960 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5961 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5962 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5963 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5964 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5965 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5966 #endif 5967 } 5968 5969 5970 int 5971 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5972 int offset, int limit, 5973 struct sockaddr *src, struct sockaddr *dst, 5974 struct sockaddr *altsa) 5975 { 5976 /* 5977 * grub through the INIT pulling addresses and loading them to the 5978 * nets structure in the asoc. The from address in the mbuf should 5979 * also be loaded (if it is not already). This routine can be called 5980 * with either INIT or INIT-ACK's as long as the m points to the IP 5981 * packet and the offset points to the beginning of the parameters. 5982 */ 5983 struct sctp_inpcb *inp; 5984 struct sctp_nets *net, *nnet, *net_tmp; 5985 struct sctp_paramhdr *phdr, parm_buf; 5986 struct sctp_tcb *stcb_tmp; 5987 uint16_t ptype, plen; 5988 struct sockaddr *sa; 5989 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5990 struct sctp_auth_random *p_random = NULL; 5991 uint16_t random_len = 0; 5992 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5993 struct sctp_auth_hmac_algo *hmacs = NULL; 5994 uint16_t hmacs_len = 0; 5995 uint8_t saw_asconf = 0; 5996 uint8_t saw_asconf_ack = 0; 5997 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 5998 struct sctp_auth_chunk_list *chunks = NULL; 5999 uint16_t num_chunks = 0; 6000 sctp_key_t *new_key; 6001 uint32_t keylen; 6002 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6003 uint8_t ecn_allowed; 6004 6005 #ifdef INET 6006 struct sockaddr_in sin; 6007 6008 #endif 6009 #ifdef INET6 6010 struct sockaddr_in6 sin6; 6011 6012 #endif 6013 6014 /* First get the destination address setup too. */ 6015 #ifdef INET 6016 memset(&sin, 0, sizeof(sin)); 6017 sin.sin_family = AF_INET; 6018 sin.sin_len = sizeof(sin); 6019 sin.sin_port = stcb->rport; 6020 #endif 6021 #ifdef INET6 6022 memset(&sin6, 0, sizeof(sin6)); 6023 sin6.sin6_family = AF_INET6; 6024 sin6.sin6_len = sizeof(struct sockaddr_in6); 6025 sin6.sin6_port = stcb->rport; 6026 #endif 6027 if (altsa) { 6028 sa = altsa; 6029 } else { 6030 sa = src; 6031 } 6032 /* Turn off ECN until we get through all params */ 6033 ecn_allowed = 0; 6034 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6035 /* mark all addresses that we have currently on the list */ 6036 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6037 } 6038 /* does the source address already exist? if so skip it */ 6039 inp = stcb->sctp_ep; 6040 atomic_add_int(&stcb->asoc.refcnt, 1); 6041 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6042 atomic_add_int(&stcb->asoc.refcnt, -1); 6043 6044 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6045 /* we must add the source address */ 6046 /* no scope set here since we have a tcb already. */ 6047 switch (sa->sa_family) { 6048 #ifdef INET 6049 case AF_INET: 6050 if (stcb->asoc.ipv4_addr_legal) { 6051 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6052 return (-1); 6053 } 6054 } 6055 break; 6056 #endif 6057 #ifdef INET6 6058 case AF_INET6: 6059 if (stcb->asoc.ipv6_addr_legal) { 6060 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6061 return (-2); 6062 } 6063 } 6064 break; 6065 #endif 6066 default: 6067 break; 6068 } 6069 } else { 6070 if (net_tmp != NULL && stcb_tmp == stcb) { 6071 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6072 } else if (stcb_tmp != stcb) { 6073 /* It belongs to another association? */ 6074 if (stcb_tmp) 6075 SCTP_TCB_UNLOCK(stcb_tmp); 6076 return (-3); 6077 } 6078 } 6079 if (stcb->asoc.state == 0) { 6080 /* the assoc was freed? */ 6081 return (-4); 6082 } 6083 /* 6084 * peer must explicitly turn this on. This may have been initialized 6085 * to be "on" in order to allow local addr changes while INIT's are 6086 * in flight. 6087 */ 6088 stcb->asoc.peer_supports_asconf = 0; 6089 /* now we must go through each of the params. */ 6090 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6091 while (phdr) { 6092 ptype = ntohs(phdr->param_type); 6093 plen = ntohs(phdr->param_length); 6094 /* 6095 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6096 * (uint32_t)ptype, (int)plen); 6097 */ 6098 if (offset + plen > limit) { 6099 break; 6100 } 6101 if (plen == 0) { 6102 break; 6103 } 6104 #ifdef INET 6105 if (ptype == SCTP_IPV4_ADDRESS) { 6106 if (stcb->asoc.ipv4_addr_legal) { 6107 struct sctp_ipv4addr_param *p4, p4_buf; 6108 6109 /* ok get the v4 address and check/add */ 6110 phdr = sctp_get_next_param(m, offset, 6111 (struct sctp_paramhdr *)&p4_buf, 6112 sizeof(p4_buf)); 6113 if (plen != sizeof(struct sctp_ipv4addr_param) || 6114 phdr == NULL) { 6115 return (-5); 6116 } 6117 p4 = (struct sctp_ipv4addr_param *)phdr; 6118 sin.sin_addr.s_addr = p4->addr; 6119 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6120 /* Skip multi-cast addresses */ 6121 goto next_param; 6122 } 6123 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6124 (sin.sin_addr.s_addr == INADDR_ANY)) { 6125 goto next_param; 6126 } 6127 sa = (struct sockaddr *)&sin; 6128 inp = stcb->sctp_ep; 6129 atomic_add_int(&stcb->asoc.refcnt, 1); 6130 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6131 dst, stcb); 6132 atomic_add_int(&stcb->asoc.refcnt, -1); 6133 6134 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6135 inp == NULL) { 6136 /* we must add the source address */ 6137 /* 6138 * no scope set since we have a tcb 6139 * already 6140 */ 6141 6142 /* 6143 * we must validate the state again 6144 * here 6145 */ 6146 add_it_now: 6147 if (stcb->asoc.state == 0) { 6148 /* the assoc was freed? */ 6149 return (-7); 6150 } 6151 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6152 return (-8); 6153 } 6154 } else if (stcb_tmp == stcb) { 6155 if (stcb->asoc.state == 0) { 6156 /* the assoc was freed? */ 6157 return (-10); 6158 } 6159 if (net != NULL) { 6160 /* clear flag */ 6161 net->dest_state &= 6162 ~SCTP_ADDR_NOT_IN_ASSOC; 6163 } 6164 } else { 6165 /* 6166 * strange, address is in another 6167 * assoc? straighten out locks. 6168 */ 6169 if (stcb_tmp) { 6170 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6171 /* 6172 * in setup state we 6173 * abort this guy 6174 */ 6175 sctp_abort_an_association(stcb_tmp->sctp_ep, 6176 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6177 goto add_it_now; 6178 } 6179 SCTP_TCB_UNLOCK(stcb_tmp); 6180 } 6181 if (stcb->asoc.state == 0) { 6182 /* the assoc was freed? */ 6183 return (-12); 6184 } 6185 return (-13); 6186 } 6187 } 6188 } else 6189 #endif 6190 #ifdef INET6 6191 if (ptype == SCTP_IPV6_ADDRESS) { 6192 if (stcb->asoc.ipv6_addr_legal) { 6193 /* ok get the v6 address and check/add */ 6194 struct sctp_ipv6addr_param *p6, p6_buf; 6195 6196 phdr = sctp_get_next_param(m, offset, 6197 (struct sctp_paramhdr *)&p6_buf, 6198 sizeof(p6_buf)); 6199 if (plen != sizeof(struct sctp_ipv6addr_param) || 6200 phdr == NULL) { 6201 return (-14); 6202 } 6203 p6 = (struct sctp_ipv6addr_param *)phdr; 6204 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6205 sizeof(p6->addr)); 6206 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6207 /* Skip multi-cast addresses */ 6208 goto next_param; 6209 } 6210 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6211 /* 6212 * Link local make no sense without 6213 * scope 6214 */ 6215 goto next_param; 6216 } 6217 sa = (struct sockaddr *)&sin6; 6218 inp = stcb->sctp_ep; 6219 atomic_add_int(&stcb->asoc.refcnt, 1); 6220 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6221 dst, stcb); 6222 atomic_add_int(&stcb->asoc.refcnt, -1); 6223 if (stcb_tmp == NULL && 6224 (inp == stcb->sctp_ep || inp == NULL)) { 6225 /* 6226 * we must validate the state again 6227 * here 6228 */ 6229 add_it_now6: 6230 if (stcb->asoc.state == 0) { 6231 /* the assoc was freed? */ 6232 return (-16); 6233 } 6234 /* 6235 * we must add the address, no scope 6236 * set 6237 */ 6238 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6239 return (-17); 6240 } 6241 } else if (stcb_tmp == stcb) { 6242 /* 6243 * we must validate the state again 6244 * here 6245 */ 6246 if (stcb->asoc.state == 0) { 6247 /* the assoc was freed? */ 6248 return (-19); 6249 } 6250 if (net != NULL) { 6251 /* clear flag */ 6252 net->dest_state &= 6253 ~SCTP_ADDR_NOT_IN_ASSOC; 6254 } 6255 } else { 6256 /* 6257 * strange, address is in another 6258 * assoc? straighten out locks. 6259 */ 6260 if (stcb_tmp) 6261 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6262 /* 6263 * in setup state we 6264 * abort this guy 6265 */ 6266 sctp_abort_an_association(stcb_tmp->sctp_ep, 6267 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6268 goto add_it_now6; 6269 } 6270 SCTP_TCB_UNLOCK(stcb_tmp); 6271 6272 if (stcb->asoc.state == 0) { 6273 /* the assoc was freed? */ 6274 return (-21); 6275 } 6276 return (-22); 6277 } 6278 } 6279 } else 6280 #endif 6281 if (ptype == SCTP_ECN_CAPABLE) { 6282 ecn_allowed = 1; 6283 } else if (ptype == SCTP_ULP_ADAPTATION) { 6284 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6285 struct sctp_adaptation_layer_indication ai, 6286 *aip; 6287 6288 phdr = sctp_get_next_param(m, offset, 6289 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6290 aip = (struct sctp_adaptation_layer_indication *)phdr; 6291 if (aip) { 6292 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6293 stcb->asoc.adaptation_needed = 1; 6294 } 6295 } 6296 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6297 struct sctp_asconf_addr_param lstore, *fee; 6298 int lptype; 6299 struct sockaddr *lsa = NULL; 6300 6301 #ifdef INET 6302 struct sctp_asconf_addrv4_param *fii; 6303 6304 #endif 6305 6306 stcb->asoc.peer_supports_asconf = 1; 6307 if (plen > sizeof(lstore)) { 6308 return (-23); 6309 } 6310 phdr = sctp_get_next_param(m, offset, 6311 (struct sctp_paramhdr *)&lstore, 6312 min(plen, sizeof(lstore))); 6313 if (phdr == NULL) { 6314 return (-24); 6315 } 6316 fee = (struct sctp_asconf_addr_param *)phdr; 6317 lptype = ntohs(fee->addrp.ph.param_type); 6318 switch (lptype) { 6319 #ifdef INET 6320 case SCTP_IPV4_ADDRESS: 6321 if (plen != 6322 sizeof(struct sctp_asconf_addrv4_param)) { 6323 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6324 (int)sizeof(struct sctp_asconf_addrv4_param), 6325 plen); 6326 } else { 6327 fii = (struct sctp_asconf_addrv4_param *)fee; 6328 sin.sin_addr.s_addr = fii->addrp.addr; 6329 lsa = (struct sockaddr *)&sin; 6330 } 6331 break; 6332 #endif 6333 #ifdef INET6 6334 case SCTP_IPV6_ADDRESS: 6335 if (plen != 6336 sizeof(struct sctp_asconf_addr_param)) { 6337 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6338 (int)sizeof(struct sctp_asconf_addr_param), 6339 plen); 6340 } else { 6341 memcpy(sin6.sin6_addr.s6_addr, 6342 fee->addrp.addr, 6343 sizeof(fee->addrp.addr)); 6344 lsa = (struct sockaddr *)&sin6; 6345 } 6346 break; 6347 #endif 6348 default: 6349 break; 6350 } 6351 if (lsa) { 6352 (void)sctp_set_primary_addr(stcb, sa, NULL); 6353 } 6354 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6355 stcb->asoc.peer_supports_nat = 1; 6356 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6357 /* Peer supports pr-sctp */ 6358 stcb->asoc.peer_supports_prsctp = 1; 6359 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6360 /* A supported extension chunk */ 6361 struct sctp_supported_chunk_types_param *pr_supported; 6362 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6363 int num_ent, i; 6364 6365 phdr = sctp_get_next_param(m, offset, 6366 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6367 if (phdr == NULL) { 6368 return (-25); 6369 } 6370 stcb->asoc.peer_supports_asconf = 0; 6371 stcb->asoc.peer_supports_prsctp = 0; 6372 stcb->asoc.peer_supports_pktdrop = 0; 6373 stcb->asoc.peer_supports_strreset = 0; 6374 stcb->asoc.peer_supports_nr_sack = 0; 6375 stcb->asoc.peer_supports_auth = 0; 6376 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6377 num_ent = plen - sizeof(struct sctp_paramhdr); 6378 for (i = 0; i < num_ent; i++) { 6379 switch (pr_supported->chunk_types[i]) { 6380 case SCTP_ASCONF: 6381 case SCTP_ASCONF_ACK: 6382 stcb->asoc.peer_supports_asconf = 1; 6383 break; 6384 case SCTP_FORWARD_CUM_TSN: 6385 stcb->asoc.peer_supports_prsctp = 1; 6386 break; 6387 case SCTP_PACKET_DROPPED: 6388 stcb->asoc.peer_supports_pktdrop = 1; 6389 break; 6390 case SCTP_NR_SELECTIVE_ACK: 6391 stcb->asoc.peer_supports_nr_sack = 1; 6392 break; 6393 case SCTP_STREAM_RESET: 6394 stcb->asoc.peer_supports_strreset = 1; 6395 break; 6396 case SCTP_AUTHENTICATION: 6397 stcb->asoc.peer_supports_auth = 1; 6398 break; 6399 default: 6400 /* one I have not learned yet */ 6401 break; 6402 6403 } 6404 } 6405 } else if (ptype == SCTP_RANDOM) { 6406 if (plen > sizeof(random_store)) 6407 break; 6408 if (got_random) { 6409 /* already processed a RANDOM */ 6410 goto next_param; 6411 } 6412 phdr = sctp_get_next_param(m, offset, 6413 (struct sctp_paramhdr *)random_store, 6414 min(sizeof(random_store), plen)); 6415 if (phdr == NULL) 6416 return (-26); 6417 p_random = (struct sctp_auth_random *)phdr; 6418 random_len = plen - sizeof(*p_random); 6419 /* enforce the random length */ 6420 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6421 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6422 return (-27); 6423 } 6424 got_random = 1; 6425 } else if (ptype == SCTP_HMAC_LIST) { 6426 int num_hmacs; 6427 int i; 6428 6429 if (plen > sizeof(hmacs_store)) 6430 break; 6431 if (got_hmacs) { 6432 /* already processed a HMAC list */ 6433 goto next_param; 6434 } 6435 phdr = sctp_get_next_param(m, offset, 6436 (struct sctp_paramhdr *)hmacs_store, 6437 min(plen, sizeof(hmacs_store))); 6438 if (phdr == NULL) 6439 return (-28); 6440 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6441 hmacs_len = plen - sizeof(*hmacs); 6442 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6443 /* validate the hmac list */ 6444 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6445 return (-29); 6446 } 6447 if (stcb->asoc.peer_hmacs != NULL) 6448 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6449 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6450 if (stcb->asoc.peer_hmacs != NULL) { 6451 for (i = 0; i < num_hmacs; i++) { 6452 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6453 ntohs(hmacs->hmac_ids[i])); 6454 } 6455 } 6456 got_hmacs = 1; 6457 } else if (ptype == SCTP_CHUNK_LIST) { 6458 int i; 6459 6460 if (plen > sizeof(chunks_store)) 6461 break; 6462 if (got_chklist) { 6463 /* already processed a Chunks list */ 6464 goto next_param; 6465 } 6466 phdr = sctp_get_next_param(m, offset, 6467 (struct sctp_paramhdr *)chunks_store, 6468 min(plen, sizeof(chunks_store))); 6469 if (phdr == NULL) 6470 return (-30); 6471 chunks = (struct sctp_auth_chunk_list *)phdr; 6472 num_chunks = plen - sizeof(*chunks); 6473 if (stcb->asoc.peer_auth_chunks != NULL) 6474 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6475 else 6476 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6477 for (i = 0; i < num_chunks; i++) { 6478 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6479 stcb->asoc.peer_auth_chunks); 6480 /* record asconf/asconf-ack if listed */ 6481 if (chunks->chunk_types[i] == SCTP_ASCONF) 6482 saw_asconf = 1; 6483 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6484 saw_asconf_ack = 1; 6485 6486 } 6487 got_chklist = 1; 6488 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6489 (ptype == SCTP_STATE_COOKIE) || 6490 (ptype == SCTP_UNRECOG_PARAM) || 6491 (ptype == SCTP_COOKIE_PRESERVE) || 6492 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6493 (ptype == SCTP_ADD_IP_ADDRESS) || 6494 (ptype == SCTP_DEL_IP_ADDRESS) || 6495 (ptype == SCTP_ERROR_CAUSE_IND) || 6496 (ptype == SCTP_SUCCESS_REPORT)) { 6497 /* don't care */ ; 6498 } else { 6499 if ((ptype & 0x8000) == 0x0000) { 6500 /* 6501 * must stop processing the rest of the 6502 * param's. Any report bits were handled 6503 * with the call to 6504 * sctp_arethere_unrecognized_parameters() 6505 * when the INIT or INIT-ACK was first seen. 6506 */ 6507 break; 6508 } 6509 } 6510 6511 next_param: 6512 offset += SCTP_SIZE32(plen); 6513 if (offset >= limit) { 6514 break; 6515 } 6516 phdr = sctp_get_next_param(m, offset, &parm_buf, 6517 sizeof(parm_buf)); 6518 } 6519 /* Now check to see if we need to purge any addresses */ 6520 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6521 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6522 SCTP_ADDR_NOT_IN_ASSOC) { 6523 /* This address has been removed from the asoc */ 6524 /* remove and free it */ 6525 stcb->asoc.numnets--; 6526 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6527 sctp_free_remote_addr(net); 6528 if (net == stcb->asoc.primary_destination) { 6529 stcb->asoc.primary_destination = NULL; 6530 sctp_select_primary_destination(stcb); 6531 } 6532 } 6533 } 6534 if (ecn_allowed == 0) { 6535 stcb->asoc.ecn_allowed = 0; 6536 } 6537 /* validate authentication required parameters */ 6538 if (got_random && got_hmacs) { 6539 stcb->asoc.peer_supports_auth = 1; 6540 } else { 6541 stcb->asoc.peer_supports_auth = 0; 6542 } 6543 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6544 /* peer does not support auth but sent a chunks list? */ 6545 return (-31); 6546 } 6547 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6548 !stcb->asoc.peer_supports_auth) { 6549 /* peer supports asconf but not auth? */ 6550 return (-32); 6551 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6552 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6553 return (-33); 6554 } 6555 /* concatenate the full random key */ 6556 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6557 if (chunks != NULL) { 6558 keylen += sizeof(*chunks) + num_chunks; 6559 } 6560 new_key = sctp_alloc_key(keylen); 6561 if (new_key != NULL) { 6562 /* copy in the RANDOM */ 6563 if (p_random != NULL) { 6564 keylen = sizeof(*p_random) + random_len; 6565 bcopy(p_random, new_key->key, keylen); 6566 } 6567 /* append in the AUTH chunks */ 6568 if (chunks != NULL) { 6569 bcopy(chunks, new_key->key + keylen, 6570 sizeof(*chunks) + num_chunks); 6571 keylen += sizeof(*chunks) + num_chunks; 6572 } 6573 /* append in the HMACs */ 6574 if (hmacs != NULL) { 6575 bcopy(hmacs, new_key->key + keylen, 6576 sizeof(*hmacs) + hmacs_len); 6577 } 6578 } else { 6579 /* failed to get memory for the key */ 6580 return (-34); 6581 } 6582 if (stcb->asoc.authinfo.peer_random != NULL) 6583 sctp_free_key(stcb->asoc.authinfo.peer_random); 6584 stcb->asoc.authinfo.peer_random = new_key; 6585 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6586 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6587 6588 return (0); 6589 } 6590 6591 int 6592 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6593 struct sctp_nets *net) 6594 { 6595 /* make sure the requested primary address exists in the assoc */ 6596 if (net == NULL && sa) 6597 net = sctp_findnet(stcb, sa); 6598 6599 if (net == NULL) { 6600 /* didn't find the requested primary address! */ 6601 return (-1); 6602 } else { 6603 /* set the primary address */ 6604 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6605 /* Must be confirmed, so queue to set */ 6606 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6607 return (0); 6608 } 6609 stcb->asoc.primary_destination = net; 6610 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6611 sctp_free_remote_addr(stcb->asoc.alternate); 6612 stcb->asoc.alternate = NULL; 6613 } 6614 net = TAILQ_FIRST(&stcb->asoc.nets); 6615 if (net != stcb->asoc.primary_destination) { 6616 /* 6617 * first one on the list is NOT the primary 6618 * sctp_cmpaddr() is much more efficient if the 6619 * primary is the first on the list, make it so. 6620 */ 6621 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6622 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6623 } 6624 return (0); 6625 } 6626 } 6627 6628 int 6629 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6630 { 6631 /* 6632 * This function serves two purposes. It will see if a TAG can be 6633 * re-used and return 1 for yes it is ok and 0 for don't use that 6634 * tag. A secondary function it will do is purge out old tags that 6635 * can be removed. 6636 */ 6637 struct sctpvtaghead *chain; 6638 struct sctp_tagblock *twait_block; 6639 struct sctpasochead *head; 6640 struct sctp_tcb *stcb; 6641 int i; 6642 6643 SCTP_INP_INFO_RLOCK(); 6644 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6645 SCTP_BASE_INFO(hashasocmark))]; 6646 if (head == NULL) { 6647 /* invalid vtag */ 6648 goto skip_vtag_check; 6649 } 6650 LIST_FOREACH(stcb, head, sctp_asocs) { 6651 /* 6652 * We choose not to lock anything here. TCB's can't be 6653 * removed since we have the read lock, so they can't be 6654 * freed on us, same thing for the INP. I may be wrong with 6655 * this assumption, but we will go with it for now :-) 6656 */ 6657 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6658 continue; 6659 } 6660 if (stcb->asoc.my_vtag == tag) { 6661 /* candidate */ 6662 if (stcb->rport != rport) { 6663 continue; 6664 } 6665 if (stcb->sctp_ep->sctp_lport != lport) { 6666 continue; 6667 } 6668 /* Its a used tag set */ 6669 SCTP_INP_INFO_RUNLOCK(); 6670 return (0); 6671 } 6672 } 6673 skip_vtag_check: 6674 6675 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6676 /* Now what about timed wait ? */ 6677 if (!LIST_EMPTY(chain)) { 6678 /* 6679 * Block(s) are present, lets see if we have this tag in the 6680 * list 6681 */ 6682 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6683 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6684 if (twait_block->vtag_block[i].v_tag == 0) { 6685 /* not used */ 6686 continue; 6687 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6688 now->tv_sec) { 6689 /* Audit expires this guy */ 6690 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6691 twait_block->vtag_block[i].v_tag = 0; 6692 twait_block->vtag_block[i].lport = 0; 6693 twait_block->vtag_block[i].rport = 0; 6694 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6695 (twait_block->vtag_block[i].lport == lport) && 6696 (twait_block->vtag_block[i].rport == rport)) { 6697 /* Bad tag, sorry :< */ 6698 SCTP_INP_INFO_RUNLOCK(); 6699 return (0); 6700 } 6701 } 6702 } 6703 } 6704 SCTP_INP_INFO_RUNLOCK(); 6705 return (1); 6706 } 6707 6708 static void 6709 sctp_drain_mbufs(struct sctp_tcb *stcb) 6710 { 6711 /* 6712 * We must hunt this association for MBUF's past the cumack (i.e. 6713 * out of order data that we can renege on). 6714 */ 6715 struct sctp_association *asoc; 6716 struct sctp_tmit_chunk *chk, *nchk; 6717 uint32_t cumulative_tsn_p1; 6718 struct sctp_queued_to_read *ctl, *nctl; 6719 int cnt, strmat; 6720 uint32_t gap, i; 6721 int fnd = 0; 6722 6723 /* We look for anything larger than the cum-ack + 1 */ 6724 6725 asoc = &stcb->asoc; 6726 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6727 /* none we can reneg on. */ 6728 return; 6729 } 6730 SCTP_STAT_INCR(sctps_protocol_drains_done); 6731 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6732 cnt = 0; 6733 /* First look in the re-assembly queue */ 6734 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6735 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6736 /* Yep it is above cum-ack */ 6737 cnt++; 6738 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6739 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6740 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6741 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6742 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6743 if (chk->data) { 6744 sctp_m_freem(chk->data); 6745 chk->data = NULL; 6746 } 6747 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6748 } 6749 } 6750 /* Ok that was fun, now we will drain all the inbound streams? */ 6751 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6752 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6753 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6754 /* Yep it is above cum-ack */ 6755 cnt++; 6756 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6757 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6758 sctp_ucount_decr(asoc->cnt_on_all_streams); 6759 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6760 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6761 if (ctl->data) { 6762 sctp_m_freem(ctl->data); 6763 ctl->data = NULL; 6764 } 6765 sctp_free_remote_addr(ctl->whoFrom); 6766 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6767 SCTP_DECR_READQ_COUNT(); 6768 } 6769 } 6770 } 6771 if (cnt) { 6772 /* We must back down to see what the new highest is */ 6773 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6774 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6775 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6776 asoc->highest_tsn_inside_map = i; 6777 fnd = 1; 6778 break; 6779 } 6780 } 6781 if (!fnd) { 6782 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6783 } 6784 /* 6785 * Question, should we go through the delivery queue? The 6786 * only reason things are on here is the app not reading OR 6787 * a p-d-api up. An attacker COULD send enough in to 6788 * initiate the PD-API and then send a bunch of stuff to 6789 * other streams... these would wind up on the delivery 6790 * queue.. and then we would not get to them. But in order 6791 * to do this I then have to back-track and un-deliver 6792 * sequence numbers in streams.. el-yucko. I think for now 6793 * we will NOT look at the delivery queue and leave it to be 6794 * something to consider later. An alternative would be to 6795 * abort the P-D-API with a notification and then deliver 6796 * the data.... Or another method might be to keep track of 6797 * how many times the situation occurs and if we see a 6798 * possible attack underway just abort the association. 6799 */ 6800 #ifdef SCTP_DEBUG 6801 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6802 #endif 6803 /* 6804 * Now do we need to find a new 6805 * asoc->highest_tsn_inside_map? 6806 */ 6807 asoc->last_revoke_count = cnt; 6808 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6809 /* sa_ignore NO_NULL_CHK */ 6810 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6811 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6812 } 6813 /* 6814 * Another issue, in un-setting the TSN's in the mapping array we 6815 * DID NOT adjust the highest_tsn marker. This will cause one of 6816 * two things to occur. It may cause us to do extra work in checking 6817 * for our mapping array movement. More importantly it may cause us 6818 * to SACK every datagram. This may not be a bad thing though since 6819 * we will recover once we get our cum-ack above and all this stuff 6820 * we dumped recovered. 6821 */ 6822 } 6823 6824 void 6825 sctp_drain() 6826 { 6827 /* 6828 * We must walk the PCB lists for ALL associations here. The system 6829 * is LOW on MBUF's and needs help. This is where reneging will 6830 * occur. We really hope this does NOT happen! 6831 */ 6832 VNET_ITERATOR_DECL(vnet_iter); 6833 VNET_LIST_RLOCK_NOSLEEP(); 6834 VNET_FOREACH(vnet_iter) { 6835 CURVNET_SET(vnet_iter); 6836 struct sctp_inpcb *inp; 6837 struct sctp_tcb *stcb; 6838 6839 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6840 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6841 #ifdef VIMAGE 6842 continue; 6843 #else 6844 return; 6845 #endif 6846 } 6847 SCTP_INP_INFO_RLOCK(); 6848 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6849 /* For each endpoint */ 6850 SCTP_INP_RLOCK(inp); 6851 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6852 /* For each association */ 6853 SCTP_TCB_LOCK(stcb); 6854 sctp_drain_mbufs(stcb); 6855 SCTP_TCB_UNLOCK(stcb); 6856 } 6857 SCTP_INP_RUNLOCK(inp); 6858 } 6859 SCTP_INP_INFO_RUNLOCK(); 6860 CURVNET_RESTORE(); 6861 } 6862 VNET_LIST_RUNLOCK_NOSLEEP(); 6863 } 6864 6865 /* 6866 * start a new iterator 6867 * iterates through all endpoints and associations based on the pcb_state 6868 * flags and asoc_state. "af" (mandatory) is executed for all matching 6869 * assocs and "ef" (optional) is executed when the iterator completes. 6870 * "inpf" (optional) is executed for each new endpoint as it is being 6871 * iterated through. inpe (optional) is called when the inp completes 6872 * its way through all the stcbs. 6873 */ 6874 int 6875 sctp_initiate_iterator(inp_func inpf, 6876 asoc_func af, 6877 inp_func inpe, 6878 uint32_t pcb_state, 6879 uint32_t pcb_features, 6880 uint32_t asoc_state, 6881 void *argp, 6882 uint32_t argi, 6883 end_func ef, 6884 struct sctp_inpcb *s_inp, 6885 uint8_t chunk_output_off) 6886 { 6887 struct sctp_iterator *it = NULL; 6888 6889 if (af == NULL) { 6890 return (-1); 6891 } 6892 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6893 SCTP_M_ITER); 6894 if (it == NULL) { 6895 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6896 return (ENOMEM); 6897 } 6898 memset(it, 0, sizeof(*it)); 6899 it->function_assoc = af; 6900 it->function_inp = inpf; 6901 if (inpf) 6902 it->done_current_ep = 0; 6903 else 6904 it->done_current_ep = 1; 6905 it->function_atend = ef; 6906 it->pointer = argp; 6907 it->val = argi; 6908 it->pcb_flags = pcb_state; 6909 it->pcb_features = pcb_features; 6910 it->asoc_state = asoc_state; 6911 it->function_inp_end = inpe; 6912 it->no_chunk_output = chunk_output_off; 6913 it->vn = curvnet; 6914 if (s_inp) { 6915 /* Assume lock is held here */ 6916 it->inp = s_inp; 6917 SCTP_INP_INCR_REF(it->inp); 6918 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6919 } else { 6920 SCTP_INP_INFO_RLOCK(); 6921 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6922 if (it->inp) { 6923 SCTP_INP_INCR_REF(it->inp); 6924 } 6925 SCTP_INP_INFO_RUNLOCK(); 6926 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6927 6928 } 6929 SCTP_IPI_ITERATOR_WQ_LOCK(); 6930 6931 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6932 if (sctp_it_ctl.iterator_running == 0) { 6933 sctp_wakeup_iterator(); 6934 } 6935 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6936 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6937 return (0); 6938 } 6939