1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2011, 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 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #include <sys/proc.h> 40 #include <netinet/sctp_var.h> 41 #include <netinet/sctp_sysctl.h> 42 #include <netinet/sctp_pcb.h> 43 #include <netinet/sctputil.h> 44 #include <netinet/sctp.h> 45 #include <netinet/sctp_header.h> 46 #include <netinet/sctp_asconf.h> 47 #include <netinet/sctp_output.h> 48 #include <netinet/sctp_timer.h> 49 #include <netinet/sctp_bsd_addr.h> 50 #include <netinet/sctp_dtrace_define.h> 51 #include <netinet/udp.h> 52 #ifdef INET6 53 #include <netinet6/ip6_var.h> 54 #endif 55 #include <sys/sched.h> 56 #include <sys/smp.h> 57 #include <sys/unistd.h> 58 59 60 VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62 /* FIX: we don't handle multiple link local scopes */ 63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64 #ifdef INET6 65 int 66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67 { 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return 0; 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return 0; 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79 } 80 81 #endif 82 83 void 84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85 { 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 100 SCTP_INP_INFO_RUNLOCK(); 101 } 102 103 /* 104 * Addresses are added to VRF's (Virtual Router's). For BSD we 105 * have only the default VRF 0. We maintain a hash list of 106 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 107 * these has a list of addresses. When we add a new address 108 * to a VRF we lookup the ifn/ifn_index, if the ifn does 109 * not exist we create it and add it to the list of IFN's 110 * within the VRF. Once we have the sctp_ifn, we add the 111 * address to the list. So we look something like: 112 * 113 * hash-vrf-table 114 * vrf-> ifn-> ifn -> ifn 115 * vrf | 116 * ... +--ifa-> ifa -> ifa 117 * vrf 118 * 119 * We keep these separate lists since the SCTP subsystem will 120 * point to these from its source address selection nets structure. 121 * When an address is deleted it does not happen right away on 122 * the SCTP side, it gets scheduled. What we do when a 123 * delete happens is immediately remove the address from 124 * the master list and decrement the refcount. As our 125 * addip iterator works through and frees the src address 126 * selection pointing to the sctp_ifa, eventually the refcount 127 * will reach 0 and we will delete it. Note that it is assumed 128 * that any locking on system level ifn/ifa is done at the 129 * caller of these functions and these routines will only 130 * lock the SCTP structures as they add or delete things. 131 * 132 * Other notes on VRF concepts. 133 * - An endpoint can be in multiple VRF's 134 * - An association lives within a VRF and only one VRF. 135 * - Any incoming packet we can deduce the VRF for by 136 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 137 * - Any downward send call or connect call must supply the 138 * VRF via ancillary data or via some sort of set default 139 * VRF socket option call (again for BSD no brainer since 140 * the VRF is always 0). 141 * - An endpoint may add multiple VRF's to it. 142 * - Listening sockets can accept associations in any 143 * of the VRF's they are in but the assoc will end up 144 * in only one VRF (gotten from the packet or connect/send). 145 * 146 */ 147 148 struct sctp_vrf * 149 sctp_allocate_vrf(int vrf_id) 150 { 151 struct sctp_vrf *vrf = NULL; 152 struct sctp_vrflist *bucket; 153 154 /* First allocate the VRF structure */ 155 vrf = sctp_find_vrf(vrf_id); 156 if (vrf) { 157 /* Already allocated */ 158 return (vrf); 159 } 160 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 161 SCTP_M_VRF); 162 if (vrf == NULL) { 163 /* No memory */ 164 #ifdef INVARIANTS 165 panic("No memory for VRF:%d", vrf_id); 166 #endif 167 return (NULL); 168 } 169 /* setup the VRF */ 170 memset(vrf, 0, sizeof(struct sctp_vrf)); 171 vrf->vrf_id = vrf_id; 172 LIST_INIT(&vrf->ifnlist); 173 vrf->total_ifa_count = 0; 174 vrf->refcount = 0; 175 /* now also setup table ids */ 176 SCTP_INIT_VRF_TABLEID(vrf); 177 /* Init the HASH of addresses */ 178 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 179 &vrf->vrf_addr_hashmark); 180 if (vrf->vrf_addr_hash == NULL) { 181 /* No memory */ 182 #ifdef INVARIANTS 183 panic("No memory for VRF:%d", vrf_id); 184 #endif 185 SCTP_FREE(vrf, SCTP_M_VRF); 186 return (NULL); 187 } 188 /* Add it to the hash table */ 189 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 190 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 191 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 192 return (vrf); 193 } 194 195 196 struct sctp_ifn * 197 sctp_find_ifn(void *ifn, uint32_t ifn_index) 198 { 199 struct sctp_ifn *sctp_ifnp; 200 struct sctp_ifnlist *hash_ifn_head; 201 202 /* 203 * We assume the lock is held for the addresses if that's wrong 204 * problems could occur :-) 205 */ 206 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 207 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 208 if (sctp_ifnp->ifn_index == ifn_index) { 209 return (sctp_ifnp); 210 } 211 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 212 return (sctp_ifnp); 213 } 214 } 215 return (NULL); 216 } 217 218 219 220 struct sctp_vrf * 221 sctp_find_vrf(uint32_t vrf_id) 222 { 223 struct sctp_vrflist *bucket; 224 struct sctp_vrf *liste; 225 226 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 227 LIST_FOREACH(liste, bucket, next_vrf) { 228 if (vrf_id == liste->vrf_id) { 229 return (liste); 230 } 231 } 232 return (NULL); 233 } 234 235 void 236 sctp_free_vrf(struct sctp_vrf *vrf) 237 { 238 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 239 if (vrf->vrf_addr_hash) { 240 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 241 vrf->vrf_addr_hash = NULL; 242 } 243 /* We zero'd the count */ 244 LIST_REMOVE(vrf, next_vrf); 245 SCTP_FREE(vrf, SCTP_M_VRF); 246 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 247 } 248 } 249 250 void 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252 { 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261 } 262 263 void 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 265 { 266 struct sctp_ifn *sctp_ifnp; 267 268 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 269 if (sctp_ifnp != NULL) { 270 sctp_ifnp->ifn_mtu = mtu; 271 } 272 } 273 274 275 void 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 277 { 278 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 279 /* We zero'd the count */ 280 if (sctp_ifap->ifn_p) { 281 sctp_free_ifn(sctp_ifap->ifn_p); 282 } 283 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 284 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 285 } 286 } 287 288 static void 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 290 { 291 struct sctp_ifn *found; 292 293 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 294 if (found == NULL) { 295 /* Not in the list.. sorry */ 296 return; 297 } 298 if (hold_addr_lock == 0) 299 SCTP_IPI_ADDR_WLOCK(); 300 LIST_REMOVE(sctp_ifnp, next_bucket); 301 LIST_REMOVE(sctp_ifnp, next_ifn); 302 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 303 sctp_ifnp->registered_af); 304 if (hold_addr_lock == 0) 305 SCTP_IPI_ADDR_WUNLOCK(); 306 /* Take away the reference, and possibly free it */ 307 sctp_free_ifn(sctp_ifnp); 308 } 309 310 void 311 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 312 const char *if_name, uint32_t ifn_index) 313 { 314 struct sctp_vrf *vrf; 315 struct sctp_ifa *sctp_ifap = NULL; 316 317 SCTP_IPI_ADDR_RLOCK(); 318 vrf = sctp_find_vrf(vrf_id); 319 if (vrf == NULL) { 320 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 321 goto out; 322 323 } 324 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 325 if (sctp_ifap == NULL) { 326 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 327 goto out; 328 } 329 if (sctp_ifap->ifn_p == NULL) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 331 goto out; 332 } 333 if (if_name) { 334 int len1, len2; 335 336 len1 = strlen(if_name); 337 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 338 if (len1 != len2) { 339 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n", 340 len1, len2); 341 goto out; 342 } 343 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 345 sctp_ifap->ifn_p->ifn_name, 346 if_name); 347 goto out; 348 } 349 } else { 350 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 351 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 352 sctp_ifap->ifn_p->ifn_index, ifn_index); 353 goto out; 354 } 355 } 356 357 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 358 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 359 out: 360 SCTP_IPI_ADDR_RUNLOCK(); 361 } 362 363 void 364 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 365 const char *if_name, uint32_t ifn_index) 366 { 367 struct sctp_vrf *vrf; 368 struct sctp_ifa *sctp_ifap = NULL; 369 370 SCTP_IPI_ADDR_RLOCK(); 371 vrf = sctp_find_vrf(vrf_id); 372 if (vrf == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 374 goto out; 375 376 } 377 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 378 if (sctp_ifap == NULL) { 379 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 380 goto out; 381 } 382 if (sctp_ifap->ifn_p == NULL) { 383 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 384 goto out; 385 } 386 if (if_name) { 387 int len1, len2; 388 389 len1 = strlen(if_name); 390 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 391 if (len1 != len2) { 392 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n", 393 len1, len2); 394 goto out; 395 } 396 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 397 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 398 sctp_ifap->ifn_p->ifn_name, 399 if_name); 400 goto out; 401 } 402 } else { 403 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 404 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 405 sctp_ifap->ifn_p->ifn_index, ifn_index); 406 goto out; 407 } 408 } 409 410 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 411 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 412 out: 413 SCTP_IPI_ADDR_RUNLOCK(); 414 } 415 416 /*- 417 * Add an ifa to an ifn. 418 * Register the interface as necessary. 419 * NOTE: ADDR write lock MUST be held. 420 */ 421 static void 422 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 423 { 424 int ifa_af; 425 426 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 427 sctp_ifap->ifn_p = sctp_ifnp; 428 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 429 /* update address counts */ 430 sctp_ifnp->ifa_count++; 431 ifa_af = sctp_ifap->address.sa.sa_family; 432 switch (ifa_af) { 433 #ifdef INET 434 case AF_INET: 435 sctp_ifnp->num_v4++; 436 break; 437 #endif 438 #ifdef INET6 439 case AF_INET6: 440 sctp_ifnp->num_v6++; 441 break; 442 #endif 443 default: 444 break; 445 } 446 if (sctp_ifnp->ifa_count == 1) { 447 /* register the new interface */ 448 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 449 sctp_ifnp->registered_af = ifa_af; 450 } 451 } 452 453 /*- 454 * Remove an ifa from its ifn. 455 * If no more addresses exist, remove the ifn too. Otherwise, re-register 456 * the interface based on the remaining address families left. 457 * NOTE: ADDR write lock MUST be held. 458 */ 459 static void 460 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 461 { 462 uint32_t ifn_index; 463 464 LIST_REMOVE(sctp_ifap, next_ifa); 465 if (sctp_ifap->ifn_p) { 466 /* update address counts */ 467 sctp_ifap->ifn_p->ifa_count--; 468 switch (sctp_ifap->address.sa.sa_family) { 469 #ifdef INET 470 case AF_INET: 471 sctp_ifap->ifn_p->num_v4--; 472 break; 473 #endif 474 #ifdef INET6 475 case AF_INET6: 476 sctp_ifap->ifn_p->num_v6--; 477 break; 478 #endif 479 default: 480 break; 481 } 482 483 ifn_index = sctp_ifap->ifn_p->ifn_index; 484 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 485 /* remove the ifn, possibly freeing it */ 486 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 487 } else { 488 /* re-register address family type, if needed */ 489 if ((sctp_ifap->ifn_p->num_v6 == 0) && 490 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 491 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6); 492 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET); 493 sctp_ifap->ifn_p->registered_af = AF_INET; 494 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 495 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 496 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET); 497 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6); 498 sctp_ifap->ifn_p->registered_af = AF_INET6; 499 } 500 /* free the ifn refcount */ 501 sctp_free_ifn(sctp_ifap->ifn_p); 502 } 503 sctp_ifap->ifn_p = NULL; 504 } 505 } 506 507 struct sctp_ifa * 508 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 509 uint32_t ifn_type, const char *if_name, void *ifa, 510 struct sockaddr *addr, uint32_t ifa_flags, 511 int dynamic_add) 512 { 513 struct sctp_vrf *vrf; 514 struct sctp_ifn *sctp_ifnp = NULL; 515 struct sctp_ifa *sctp_ifap = NULL; 516 struct sctp_ifalist *hash_addr_head; 517 struct sctp_ifnlist *hash_ifn_head; 518 uint32_t hash_of_addr; 519 int new_ifn_af = 0; 520 521 #ifdef SCTP_DEBUG 522 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 523 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 524 #endif 525 SCTP_IPI_ADDR_WLOCK(); 526 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 527 if (sctp_ifnp) { 528 vrf = sctp_ifnp->vrf; 529 } else { 530 vrf = sctp_find_vrf(vrf_id); 531 if (vrf == NULL) { 532 vrf = sctp_allocate_vrf(vrf_id); 533 if (vrf == NULL) { 534 SCTP_IPI_ADDR_WUNLOCK(); 535 return (NULL); 536 } 537 } 538 } 539 if (sctp_ifnp == NULL) { 540 /* 541 * build one and add it, can't hold lock until after malloc 542 * done though. 543 */ 544 SCTP_IPI_ADDR_WUNLOCK(); 545 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 546 sizeof(struct sctp_ifn), SCTP_M_IFN); 547 if (sctp_ifnp == NULL) { 548 #ifdef INVARIANTS 549 panic("No memory for IFN"); 550 #endif 551 return (NULL); 552 } 553 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 554 sctp_ifnp->ifn_index = ifn_index; 555 sctp_ifnp->ifn_p = ifn; 556 sctp_ifnp->ifn_type = ifn_type; 557 sctp_ifnp->refcount = 0; 558 sctp_ifnp->vrf = vrf; 559 atomic_add_int(&vrf->refcount, 1); 560 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 561 if (if_name != NULL) { 562 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 563 } else { 564 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 565 } 566 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 567 LIST_INIT(&sctp_ifnp->ifalist); 568 SCTP_IPI_ADDR_WLOCK(); 569 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 570 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 571 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 572 new_ifn_af = 1; 573 } 574 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 575 if (sctp_ifap) { 576 /* Hmm, it already exists? */ 577 if ((sctp_ifap->ifn_p) && 578 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 579 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 580 sctp_ifap->ifn_p->ifn_name, ifn_index, 581 sctp_ifap); 582 if (new_ifn_af) { 583 /* Remove the created one that we don't want */ 584 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 585 } 586 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 587 /* easy to solve, just switch back to active */ 588 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 589 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 590 sctp_ifap->ifn_p = sctp_ifnp; 591 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 592 } 593 exit_stage_left: 594 SCTP_IPI_ADDR_WUNLOCK(); 595 return (sctp_ifap); 596 } else { 597 if (sctp_ifap->ifn_p) { 598 /* 599 * The last IFN gets the address, remove the 600 * old one 601 */ 602 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 603 sctp_ifap, sctp_ifap->ifn_p->ifn_name, 604 sctp_ifap->ifn_p->ifn_index, if_name, 605 ifn_index); 606 /* remove the address from the old ifn */ 607 sctp_remove_ifa_from_ifn(sctp_ifap); 608 /* move the address over to the new ifn */ 609 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 610 goto exit_stage_left; 611 } else { 612 /* repair ifnp which was NULL ? */ 613 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 614 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 615 sctp_ifnp, sctp_ifap); 616 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 617 } 618 goto exit_stage_left; 619 } 620 } 621 SCTP_IPI_ADDR_WUNLOCK(); 622 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 623 if (sctp_ifap == NULL) { 624 #ifdef INVARIANTS 625 panic("No memory for IFA"); 626 #endif 627 return (NULL); 628 } 629 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 630 sctp_ifap->ifn_p = sctp_ifnp; 631 atomic_add_int(&sctp_ifnp->refcount, 1); 632 sctp_ifap->vrf_id = vrf_id; 633 sctp_ifap->ifa = ifa; 634 memcpy(&sctp_ifap->address, addr, addr->sa_len); 635 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 636 sctp_ifap->flags = ifa_flags; 637 /* Set scope */ 638 switch (sctp_ifap->address.sa.sa_family) { 639 #ifdef INET 640 case AF_INET: 641 { 642 struct sockaddr_in *sin; 643 644 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 645 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 646 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 647 sctp_ifap->src_is_loop = 1; 648 } 649 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 650 sctp_ifap->src_is_priv = 1; 651 } 652 sctp_ifnp->num_v4++; 653 if (new_ifn_af) 654 new_ifn_af = AF_INET; 655 break; 656 } 657 #endif 658 #ifdef INET6 659 case AF_INET6: 660 { 661 /* ok to use deprecated addresses? */ 662 struct sockaddr_in6 *sin6; 663 664 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 665 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 666 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 667 sctp_ifap->src_is_loop = 1; 668 } 669 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 670 sctp_ifap->src_is_priv = 1; 671 } 672 sctp_ifnp->num_v6++; 673 if (new_ifn_af) 674 new_ifn_af = AF_INET6; 675 break; 676 } 677 #endif 678 default: 679 new_ifn_af = 0; 680 break; 681 } 682 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 683 684 if ((sctp_ifap->src_is_priv == 0) && 685 (sctp_ifap->src_is_loop == 0)) { 686 sctp_ifap->src_is_glob = 1; 687 } 688 SCTP_IPI_ADDR_WLOCK(); 689 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 690 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 691 sctp_ifap->refcount = 1; 692 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 693 sctp_ifnp->ifa_count++; 694 vrf->total_ifa_count++; 695 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 696 if (new_ifn_af) { 697 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 698 sctp_ifnp->registered_af = new_ifn_af; 699 } 700 SCTP_IPI_ADDR_WUNLOCK(); 701 if (dynamic_add) { 702 /* 703 * Bump up the refcount so that when the timer completes it 704 * will drop back down. 705 */ 706 struct sctp_laddr *wi; 707 708 atomic_add_int(&sctp_ifap->refcount, 1); 709 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 710 if (wi == NULL) { 711 /* 712 * Gak, what can we do? We have lost an address 713 * change can you say HOSED? 714 */ 715 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 716 /* Opps, must decrement the count */ 717 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 718 if_name); 719 return (NULL); 720 } 721 SCTP_INCR_LADDR_COUNT(); 722 bzero(wi, sizeof(*wi)); 723 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 724 wi->ifa = sctp_ifap; 725 wi->action = SCTP_ADD_IP_ADDRESS; 726 727 SCTP_WQ_ADDR_LOCK(); 728 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 729 SCTP_WQ_ADDR_UNLOCK(); 730 731 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 732 (struct sctp_inpcb *)NULL, 733 (struct sctp_tcb *)NULL, 734 (struct sctp_nets *)NULL); 735 } else { 736 /* it's ready for use */ 737 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 738 } 739 return (sctp_ifap); 740 } 741 742 void 743 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 744 uint32_t ifn_index, const char *if_name) 745 { 746 struct sctp_vrf *vrf; 747 struct sctp_ifa *sctp_ifap = NULL; 748 749 SCTP_IPI_ADDR_WLOCK(); 750 vrf = sctp_find_vrf(vrf_id); 751 if (vrf == NULL) { 752 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 753 goto out_now; 754 } 755 #ifdef SCTP_DEBUG 756 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 757 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 758 #endif 759 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 760 if (sctp_ifap) { 761 /* Validate the delete */ 762 if (sctp_ifap->ifn_p) { 763 int valid = 0; 764 765 /*- 766 * The name has priority over the ifn_index 767 * if its given. We do this especially for 768 * panda who might recycle indexes fast. 769 */ 770 if (if_name) { 771 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 772 /* They match its a correct delete */ 773 valid = 1; 774 } 775 } 776 if (!valid) { 777 /* last ditch check ifn_index */ 778 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 779 valid = 1; 780 } 781 } 782 if (!valid) { 783 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 784 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 785 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 786 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 787 SCTP_IPI_ADDR_WUNLOCK(); 788 return; 789 } 790 } 791 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap); 792 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 793 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 794 vrf->total_ifa_count--; 795 LIST_REMOVE(sctp_ifap, next_bucket); 796 sctp_remove_ifa_from_ifn(sctp_ifap); 797 } 798 #ifdef SCTP_DEBUG 799 else { 800 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 801 ifn_index); 802 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 803 } 804 #endif 805 806 out_now: 807 SCTP_IPI_ADDR_WUNLOCK(); 808 if (sctp_ifap) { 809 struct sctp_laddr *wi; 810 811 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 812 if (wi == NULL) { 813 /* 814 * Gak, what can we do? We have lost an address 815 * change can you say HOSED? 816 */ 817 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 818 819 /* Oops, must decrement the count */ 820 sctp_free_ifa(sctp_ifap); 821 return; 822 } 823 SCTP_INCR_LADDR_COUNT(); 824 bzero(wi, sizeof(*wi)); 825 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 826 wi->ifa = sctp_ifap; 827 wi->action = SCTP_DEL_IP_ADDRESS; 828 SCTP_WQ_ADDR_LOCK(); 829 /* 830 * Should this really be a tailq? As it is we will process 831 * the newest first :-0 832 */ 833 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 834 SCTP_WQ_ADDR_UNLOCK(); 835 836 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 837 (struct sctp_inpcb *)NULL, 838 (struct sctp_tcb *)NULL, 839 (struct sctp_nets *)NULL); 840 } 841 return; 842 } 843 844 845 static struct sctp_tcb * 846 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 847 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 848 { 849 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 850 /* 851 * If we support the TCP model, then we must now dig through to see 852 * if we can find our endpoint in the list of tcp ep's. 853 */ 854 uint16_t lport, rport; 855 struct sctppcbhead *ephead; 856 struct sctp_inpcb *inp; 857 struct sctp_laddr *laddr; 858 struct sctp_tcb *stcb; 859 struct sctp_nets *net; 860 861 if ((to == NULL) || (from == NULL)) { 862 return (NULL); 863 } 864 switch (to->sa_family) { 865 #ifdef INET 866 case AF_INET: 867 if (from->sa_family == AF_INET) { 868 lport = ((struct sockaddr_in *)to)->sin_port; 869 rport = ((struct sockaddr_in *)from)->sin_port; 870 } else { 871 return (NULL); 872 } 873 break; 874 #endif 875 #ifdef INET6 876 case AF_INET6: 877 if (from->sa_family == AF_INET6) { 878 lport = ((struct sockaddr_in6 *)to)->sin6_port; 879 rport = ((struct sockaddr_in6 *)from)->sin6_port; 880 } else { 881 return (NULL); 882 } 883 break; 884 #endif 885 default: 886 return (NULL); 887 } 888 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 889 /* 890 * Ok now for each of the guys in this bucket we must look and see: 891 * - Does the remote port match. - Does there single association's 892 * addresses match this address (to). If so we update p_ep to point 893 * to this ep and return the tcb from it. 894 */ 895 LIST_FOREACH(inp, ephead, sctp_hash) { 896 SCTP_INP_RLOCK(inp); 897 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 898 SCTP_INP_RUNLOCK(inp); 899 continue; 900 } 901 if (lport != inp->sctp_lport) { 902 SCTP_INP_RUNLOCK(inp); 903 continue; 904 } 905 if (inp->def_vrf_id != vrf_id) { 906 SCTP_INP_RUNLOCK(inp); 907 continue; 908 } 909 /* check to see if the ep has one of the addresses */ 910 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 911 /* We are NOT bound all, so look further */ 912 int match = 0; 913 914 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 915 916 if (laddr->ifa == NULL) { 917 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 918 continue; 919 } 920 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 921 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 922 continue; 923 } 924 if (laddr->ifa->address.sa.sa_family == 925 to->sa_family) { 926 /* see if it matches */ 927 928 #ifdef INET 929 if (from->sa_family == AF_INET) { 930 struct sockaddr_in *intf_addr, 931 *sin; 932 933 intf_addr = &laddr->ifa->address.sin; 934 sin = (struct sockaddr_in *)to; 935 if (sin->sin_addr.s_addr == 936 intf_addr->sin_addr.s_addr) { 937 match = 1; 938 break; 939 } 940 } 941 #endif 942 #ifdef INET6 943 if (from->sa_family == AF_INET6) { 944 struct sockaddr_in6 *intf_addr6; 945 struct sockaddr_in6 *sin6; 946 947 sin6 = (struct sockaddr_in6 *) 948 to; 949 intf_addr6 = &laddr->ifa->address.sin6; 950 951 if (SCTP6_ARE_ADDR_EQUAL(sin6, 952 intf_addr6)) { 953 match = 1; 954 break; 955 } 956 } 957 #endif 958 } 959 } 960 if (match == 0) { 961 /* This endpoint does not have this address */ 962 SCTP_INP_RUNLOCK(inp); 963 continue; 964 } 965 } 966 /* 967 * Ok if we hit here the ep has the address, does it hold 968 * the tcb? 969 */ 970 971 stcb = LIST_FIRST(&inp->sctp_asoc_list); 972 if (stcb == NULL) { 973 SCTP_INP_RUNLOCK(inp); 974 continue; 975 } 976 SCTP_TCB_LOCK(stcb); 977 if (stcb->rport != rport) { 978 /* remote port does not match. */ 979 SCTP_TCB_UNLOCK(stcb); 980 SCTP_INP_RUNLOCK(inp); 981 continue; 982 } 983 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 984 SCTP_TCB_UNLOCK(stcb); 985 SCTP_INP_RUNLOCK(inp); 986 continue; 987 } 988 /* Does this TCB have a matching address? */ 989 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 990 991 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 992 /* not the same family, can't be a match */ 993 continue; 994 } 995 switch (from->sa_family) { 996 #ifdef INET 997 case AF_INET: 998 { 999 struct sockaddr_in *sin, *rsin; 1000 1001 sin = (struct sockaddr_in *)&net->ro._l_addr; 1002 rsin = (struct sockaddr_in *)from; 1003 if (sin->sin_addr.s_addr == 1004 rsin->sin_addr.s_addr) { 1005 /* found it */ 1006 if (netp != NULL) { 1007 *netp = net; 1008 } 1009 /* 1010 * Update the endpoint 1011 * pointer 1012 */ 1013 *inp_p = inp; 1014 SCTP_INP_RUNLOCK(inp); 1015 return (stcb); 1016 } 1017 break; 1018 } 1019 #endif 1020 #ifdef INET6 1021 case AF_INET6: 1022 { 1023 struct sockaddr_in6 *sin6, *rsin6; 1024 1025 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1026 rsin6 = (struct sockaddr_in6 *)from; 1027 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1028 rsin6)) { 1029 /* found it */ 1030 if (netp != NULL) { 1031 *netp = net; 1032 } 1033 /* 1034 * Update the endpoint 1035 * pointer 1036 */ 1037 *inp_p = inp; 1038 SCTP_INP_RUNLOCK(inp); 1039 return (stcb); 1040 } 1041 break; 1042 } 1043 #endif 1044 default: 1045 /* TSNH */ 1046 break; 1047 } 1048 } 1049 SCTP_TCB_UNLOCK(stcb); 1050 SCTP_INP_RUNLOCK(inp); 1051 } 1052 return (NULL); 1053 } 1054 1055 static int 1056 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1057 { 1058 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 1059 int ipv4_addr_legal, ipv6_addr_legal; 1060 struct sctp_vrf *vrf; 1061 struct sctp_ifn *sctp_ifn; 1062 struct sctp_ifa *sctp_ifa; 1063 1064 loopback_scope = stcb->asoc.loopback_scope; 1065 ipv4_local_scope = stcb->asoc.ipv4_local_scope; 1066 local_scope = stcb->asoc.local_scope; 1067 site_scope = stcb->asoc.site_scope; 1068 ipv4_addr_legal = ipv6_addr_legal = 0; 1069 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1070 ipv6_addr_legal = 1; 1071 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) { 1072 ipv4_addr_legal = 1; 1073 } 1074 } else { 1075 ipv4_addr_legal = 1; 1076 } 1077 1078 SCTP_IPI_ADDR_RLOCK(); 1079 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1080 if (vrf == NULL) { 1081 /* no vrf, no addresses */ 1082 SCTP_IPI_ADDR_RUNLOCK(); 1083 return (0); 1084 } 1085 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1086 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1087 if ((loopback_scope == 0) && 1088 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1089 continue; 1090 } 1091 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1092 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 1093 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 1094 /* 1095 * We allow pending addresses, where 1096 * we have sent an asconf-add to be 1097 * considered valid. 1098 */ 1099 continue; 1100 } 1101 switch (sctp_ifa->address.sa.sa_family) { 1102 #ifdef INET 1103 case AF_INET: 1104 if (ipv4_addr_legal) { 1105 struct sockaddr_in *sin, 1106 *rsin; 1107 1108 sin = &sctp_ifa->address.sin; 1109 rsin = (struct sockaddr_in *)to; 1110 if ((ipv4_local_scope == 0) && 1111 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1112 continue; 1113 } 1114 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1115 SCTP_IPI_ADDR_RUNLOCK(); 1116 return (1); 1117 } 1118 } 1119 break; 1120 #endif 1121 #ifdef INET6 1122 case AF_INET6: 1123 if (ipv6_addr_legal) { 1124 struct sockaddr_in6 *sin6, 1125 *rsin6; 1126 1127 sin6 = &sctp_ifa->address.sin6; 1128 rsin6 = (struct sockaddr_in6 *)to; 1129 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1130 if (local_scope == 0) 1131 continue; 1132 if (sin6->sin6_scope_id == 0) { 1133 if (sa6_recoverscope(sin6) != 0) 1134 continue; 1135 } 1136 } 1137 if ((site_scope == 0) && 1138 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1139 continue; 1140 } 1141 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1142 SCTP_IPI_ADDR_RUNLOCK(); 1143 return (1); 1144 } 1145 } 1146 break; 1147 #endif 1148 default: 1149 /* TSNH */ 1150 break; 1151 } 1152 } 1153 } 1154 } else { 1155 struct sctp_laddr *laddr; 1156 1157 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1158 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 1159 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 1160 /* 1161 * We allow pending addresses, where we have 1162 * sent an asconf-add to be considered 1163 * valid. 1164 */ 1165 continue; 1166 } 1167 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 1168 continue; 1169 } 1170 switch (to->sa_family) { 1171 #ifdef INET 1172 case AF_INET: 1173 { 1174 struct sockaddr_in *sin, *rsin; 1175 1176 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 1177 rsin = (struct sockaddr_in *)to; 1178 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1179 SCTP_IPI_ADDR_RUNLOCK(); 1180 return (1); 1181 } 1182 break; 1183 } 1184 #endif 1185 #ifdef INET6 1186 case AF_INET6: 1187 { 1188 struct sockaddr_in6 *sin6, *rsin6; 1189 1190 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1191 rsin6 = (struct sockaddr_in6 *)to; 1192 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1193 SCTP_IPI_ADDR_RUNLOCK(); 1194 return (1); 1195 } 1196 break; 1197 } 1198 1199 #endif 1200 default: 1201 /* TSNH */ 1202 break; 1203 } 1204 1205 } 1206 } 1207 SCTP_IPI_ADDR_RUNLOCK(); 1208 return (0); 1209 } 1210 1211 /* 1212 * rules for use 1213 * 1214 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1215 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1216 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1217 * NULL. 1218 */ 1219 1220 struct sctp_tcb * 1221 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1222 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1223 { 1224 struct sctpasochead *head; 1225 struct sctp_inpcb *inp; 1226 struct sctp_tcb *stcb = NULL; 1227 struct sctp_nets *net; 1228 uint16_t rport; 1229 1230 inp = *inp_p; 1231 if (remote->sa_family == AF_INET) { 1232 rport = (((struct sockaddr_in *)remote)->sin_port); 1233 } else if (remote->sa_family == AF_INET6) { 1234 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1235 } else { 1236 return (NULL); 1237 } 1238 if (locked_tcb) { 1239 /* 1240 * UN-lock so we can do proper locking here this occurs when 1241 * called from load_addresses_from_init. 1242 */ 1243 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1244 SCTP_TCB_UNLOCK(locked_tcb); 1245 } 1246 SCTP_INP_INFO_RLOCK(); 1247 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1248 /*- 1249 * Now either this guy is our listener or it's the 1250 * connector. If it is the one that issued the connect, then 1251 * it's only chance is to be the first TCB in the list. If 1252 * it is the acceptor, then do the special_lookup to hash 1253 * and find the real inp. 1254 */ 1255 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1256 /* to is peer addr, from is my addr */ 1257 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1258 netp, inp->def_vrf_id); 1259 if ((stcb != NULL) && (locked_tcb == NULL)) { 1260 /* we have a locked tcb, lower refcount */ 1261 SCTP_INP_DECR_REF(inp); 1262 } 1263 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1264 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1265 SCTP_TCB_LOCK(locked_tcb); 1266 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1267 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1268 } 1269 SCTP_INP_INFO_RUNLOCK(); 1270 return (stcb); 1271 } else { 1272 SCTP_INP_WLOCK(inp); 1273 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1274 goto null_return; 1275 } 1276 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1277 if (stcb == NULL) { 1278 goto null_return; 1279 } 1280 SCTP_TCB_LOCK(stcb); 1281 1282 if (stcb->rport != rport) { 1283 /* remote port does not match. */ 1284 SCTP_TCB_UNLOCK(stcb); 1285 goto null_return; 1286 } 1287 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1288 SCTP_TCB_UNLOCK(stcb); 1289 goto null_return; 1290 } 1291 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1292 SCTP_TCB_UNLOCK(stcb); 1293 goto null_return; 1294 } 1295 /* now look at the list of remote addresses */ 1296 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1297 #ifdef INVARIANTS 1298 if (net == (TAILQ_NEXT(net, sctp_next))) { 1299 panic("Corrupt net list"); 1300 } 1301 #endif 1302 if (net->ro._l_addr.sa.sa_family != 1303 remote->sa_family) { 1304 /* not the same family */ 1305 continue; 1306 } 1307 switch (remote->sa_family) { 1308 #ifdef INET 1309 case AF_INET: 1310 { 1311 struct sockaddr_in *sin, 1312 *rsin; 1313 1314 sin = (struct sockaddr_in *) 1315 &net->ro._l_addr; 1316 rsin = (struct sockaddr_in *)remote; 1317 if (sin->sin_addr.s_addr == 1318 rsin->sin_addr.s_addr) { 1319 /* found it */ 1320 if (netp != NULL) { 1321 *netp = net; 1322 } 1323 if (locked_tcb == NULL) { 1324 SCTP_INP_DECR_REF(inp); 1325 } else if (locked_tcb != stcb) { 1326 SCTP_TCB_LOCK(locked_tcb); 1327 } 1328 if (locked_tcb) { 1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1330 } 1331 SCTP_INP_WUNLOCK(inp); 1332 SCTP_INP_INFO_RUNLOCK(); 1333 return (stcb); 1334 } 1335 break; 1336 } 1337 #endif 1338 #ifdef INET6 1339 case AF_INET6: 1340 { 1341 struct sockaddr_in6 *sin6, 1342 *rsin6; 1343 1344 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1345 rsin6 = (struct sockaddr_in6 *)remote; 1346 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1347 rsin6)) { 1348 /* found it */ 1349 if (netp != NULL) { 1350 *netp = net; 1351 } 1352 if (locked_tcb == NULL) { 1353 SCTP_INP_DECR_REF(inp); 1354 } else if (locked_tcb != stcb) { 1355 SCTP_TCB_LOCK(locked_tcb); 1356 } 1357 if (locked_tcb) { 1358 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1359 } 1360 SCTP_INP_WUNLOCK(inp); 1361 SCTP_INP_INFO_RUNLOCK(); 1362 return (stcb); 1363 } 1364 break; 1365 } 1366 #endif 1367 default: 1368 /* TSNH */ 1369 break; 1370 } 1371 } 1372 SCTP_TCB_UNLOCK(stcb); 1373 } 1374 } else { 1375 SCTP_INP_WLOCK(inp); 1376 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1377 goto null_return; 1378 } 1379 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1380 inp->sctp_hashmark)]; 1381 if (head == NULL) { 1382 goto null_return; 1383 } 1384 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1385 if (stcb->rport != rport) { 1386 /* remote port does not match */ 1387 continue; 1388 } 1389 SCTP_TCB_LOCK(stcb); 1390 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1391 SCTP_TCB_UNLOCK(stcb); 1392 continue; 1393 } 1394 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1395 SCTP_TCB_UNLOCK(stcb); 1396 continue; 1397 } 1398 /* now look at the list of remote addresses */ 1399 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1400 #ifdef INVARIANTS 1401 if (net == (TAILQ_NEXT(net, sctp_next))) { 1402 panic("Corrupt net list"); 1403 } 1404 #endif 1405 if (net->ro._l_addr.sa.sa_family != 1406 remote->sa_family) { 1407 /* not the same family */ 1408 continue; 1409 } 1410 switch (remote->sa_family) { 1411 #ifdef INET 1412 case AF_INET: 1413 { 1414 struct sockaddr_in *sin, 1415 *rsin; 1416 1417 sin = (struct sockaddr_in *) 1418 &net->ro._l_addr; 1419 rsin = (struct sockaddr_in *)remote; 1420 if (sin->sin_addr.s_addr == 1421 rsin->sin_addr.s_addr) { 1422 /* found it */ 1423 if (netp != NULL) { 1424 *netp = net; 1425 } 1426 if (locked_tcb == NULL) { 1427 SCTP_INP_DECR_REF(inp); 1428 } else if (locked_tcb != stcb) { 1429 SCTP_TCB_LOCK(locked_tcb); 1430 } 1431 if (locked_tcb) { 1432 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1433 } 1434 SCTP_INP_WUNLOCK(inp); 1435 SCTP_INP_INFO_RUNLOCK(); 1436 return (stcb); 1437 } 1438 break; 1439 } 1440 #endif 1441 #ifdef INET6 1442 case AF_INET6: 1443 { 1444 struct sockaddr_in6 *sin6, 1445 *rsin6; 1446 1447 sin6 = (struct sockaddr_in6 *) 1448 &net->ro._l_addr; 1449 rsin6 = (struct sockaddr_in6 *)remote; 1450 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1451 rsin6)) { 1452 /* found it */ 1453 if (netp != NULL) { 1454 *netp = net; 1455 } 1456 if (locked_tcb == NULL) { 1457 SCTP_INP_DECR_REF(inp); 1458 } else if (locked_tcb != stcb) { 1459 SCTP_TCB_LOCK(locked_tcb); 1460 } 1461 if (locked_tcb) { 1462 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1463 } 1464 SCTP_INP_WUNLOCK(inp); 1465 SCTP_INP_INFO_RUNLOCK(); 1466 return (stcb); 1467 } 1468 break; 1469 } 1470 #endif 1471 default: 1472 /* TSNH */ 1473 break; 1474 } 1475 } 1476 SCTP_TCB_UNLOCK(stcb); 1477 } 1478 } 1479 null_return: 1480 /* clean up for returning null */ 1481 if (locked_tcb) { 1482 SCTP_TCB_LOCK(locked_tcb); 1483 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1484 } 1485 SCTP_INP_WUNLOCK(inp); 1486 SCTP_INP_INFO_RUNLOCK(); 1487 /* not found */ 1488 return (NULL); 1489 } 1490 1491 /* 1492 * Find an association for a specific endpoint using the association id given 1493 * out in the COMM_UP notification 1494 */ 1495 1496 struct sctp_tcb * 1497 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1498 { 1499 /* 1500 * Use my the assoc_id to find a endpoint 1501 */ 1502 struct sctpasochead *head; 1503 struct sctp_tcb *stcb; 1504 uint32_t id; 1505 1506 if (inp == NULL) { 1507 SCTP_PRINTF("TSNH ep_associd\n"); 1508 return (NULL); 1509 } 1510 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1511 SCTP_PRINTF("TSNH ep_associd0\n"); 1512 return (NULL); 1513 } 1514 id = (uint32_t) asoc_id; 1515 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1516 if (head == NULL) { 1517 /* invalid id TSNH */ 1518 SCTP_PRINTF("TSNH ep_associd1\n"); 1519 return (NULL); 1520 } 1521 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1522 if (stcb->asoc.assoc_id == id) { 1523 if (inp != stcb->sctp_ep) { 1524 /* 1525 * some other guy has the same id active (id 1526 * collision ??). 1527 */ 1528 SCTP_PRINTF("TSNH ep_associd2\n"); 1529 continue; 1530 } 1531 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1532 continue; 1533 } 1534 if (want_lock) { 1535 SCTP_TCB_LOCK(stcb); 1536 } 1537 return (stcb); 1538 } 1539 } 1540 return (NULL); 1541 } 1542 1543 1544 struct sctp_tcb * 1545 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1546 { 1547 struct sctp_tcb *stcb; 1548 1549 SCTP_INP_RLOCK(inp); 1550 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1551 SCTP_INP_RUNLOCK(inp); 1552 return (stcb); 1553 } 1554 1555 1556 static struct sctp_inpcb * 1557 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1558 uint16_t lport, uint32_t vrf_id) 1559 { 1560 struct sctp_inpcb *inp; 1561 struct sctp_laddr *laddr; 1562 1563 #ifdef INET 1564 struct sockaddr_in *sin; 1565 1566 #endif 1567 #ifdef INET6 1568 struct sockaddr_in6 *sin6; 1569 struct sockaddr_in6 *intf_addr6; 1570 1571 #endif 1572 1573 int fnd; 1574 1575 /* 1576 * Endpoint probe expects that the INP_INFO is locked. 1577 */ 1578 #ifdef INET 1579 sin = NULL; 1580 #endif 1581 #ifdef INET6 1582 sin6 = NULL; 1583 #endif 1584 switch (nam->sa_family) { 1585 #ifdef INET 1586 case AF_INET: 1587 sin = (struct sockaddr_in *)nam; 1588 break; 1589 #endif 1590 #ifdef INET6 1591 case AF_INET6: 1592 sin6 = (struct sockaddr_in6 *)nam; 1593 break; 1594 #endif 1595 default: 1596 /* unsupported family */ 1597 return (NULL); 1598 } 1599 1600 if (head == NULL) 1601 return (NULL); 1602 1603 LIST_FOREACH(inp, head, sctp_hash) { 1604 SCTP_INP_RLOCK(inp); 1605 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1606 SCTP_INP_RUNLOCK(inp); 1607 continue; 1608 } 1609 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1610 (inp->sctp_lport == lport)) { 1611 /* got it */ 1612 #ifdef INET 1613 if ((nam->sa_family == AF_INET) && 1614 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1615 SCTP_IPV6_V6ONLY(inp)) { 1616 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1617 SCTP_INP_RUNLOCK(inp); 1618 continue; 1619 } 1620 #endif 1621 #ifdef INET6 1622 /* A V6 address and the endpoint is NOT bound V6 */ 1623 if (nam->sa_family == AF_INET6 && 1624 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1625 SCTP_INP_RUNLOCK(inp); 1626 continue; 1627 } 1628 #endif 1629 /* does a VRF id match? */ 1630 fnd = 0; 1631 if (inp->def_vrf_id == vrf_id) 1632 fnd = 1; 1633 1634 SCTP_INP_RUNLOCK(inp); 1635 if (!fnd) 1636 continue; 1637 return (inp); 1638 } 1639 SCTP_INP_RUNLOCK(inp); 1640 } 1641 switch (nam->sa_family) { 1642 #ifdef INET 1643 case AF_INET: 1644 if (sin->sin_addr.s_addr == INADDR_ANY) { 1645 /* Can't hunt for one that has no address specified */ 1646 return (NULL); 1647 } 1648 break; 1649 #endif 1650 #ifdef INET6 1651 case AF_INET6: 1652 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1653 /* Can't hunt for one that has no address specified */ 1654 return (NULL); 1655 } 1656 break; 1657 #endif 1658 default: 1659 break; 1660 } 1661 /* 1662 * ok, not bound to all so see if we can find a EP bound to this 1663 * address. 1664 */ 1665 LIST_FOREACH(inp, head, sctp_hash) { 1666 SCTP_INP_RLOCK(inp); 1667 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1668 SCTP_INP_RUNLOCK(inp); 1669 continue; 1670 } 1671 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1672 SCTP_INP_RUNLOCK(inp); 1673 continue; 1674 } 1675 /* 1676 * Ok this could be a likely candidate, look at all of its 1677 * addresses 1678 */ 1679 if (inp->sctp_lport != lport) { 1680 SCTP_INP_RUNLOCK(inp); 1681 continue; 1682 } 1683 /* does a VRF id match? */ 1684 fnd = 0; 1685 if (inp->def_vrf_id == vrf_id) 1686 fnd = 1; 1687 1688 if (!fnd) { 1689 SCTP_INP_RUNLOCK(inp); 1690 continue; 1691 } 1692 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1693 if (laddr->ifa == NULL) { 1694 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1695 __FUNCTION__); 1696 continue; 1697 } 1698 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1699 laddr->ifa); 1700 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1701 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1702 continue; 1703 } 1704 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1705 /* possible, see if it matches */ 1706 switch (nam->sa_family) { 1707 #ifdef INET 1708 case AF_INET: 1709 if (sin->sin_addr.s_addr == 1710 laddr->ifa->address.sin.sin_addr.s_addr) { 1711 SCTP_INP_RUNLOCK(inp); 1712 return (inp); 1713 } 1714 break; 1715 #endif 1716 #ifdef INET6 1717 case AF_INET6: 1718 intf_addr6 = &laddr->ifa->address.sin6; 1719 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1720 intf_addr6)) { 1721 SCTP_INP_RUNLOCK(inp); 1722 return (inp); 1723 } 1724 break; 1725 #endif 1726 } 1727 } 1728 } 1729 SCTP_INP_RUNLOCK(inp); 1730 } 1731 return (NULL); 1732 } 1733 1734 1735 static struct sctp_inpcb * 1736 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1737 { 1738 struct sctppcbhead *head; 1739 struct sctp_inpcb *t_inp; 1740 int fnd; 1741 1742 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1743 SCTP_BASE_INFO(hashmark))]; 1744 LIST_FOREACH(t_inp, head, sctp_hash) { 1745 if (t_inp->sctp_lport != lport) { 1746 continue; 1747 } 1748 /* is it in the VRF in question */ 1749 fnd = 0; 1750 if (t_inp->def_vrf_id == vrf_id) 1751 fnd = 1; 1752 if (!fnd) 1753 continue; 1754 1755 /* This one is in use. */ 1756 /* check the v6/v4 binding issue */ 1757 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1758 SCTP_IPV6_V6ONLY(t_inp)) { 1759 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1760 /* collision in V6 space */ 1761 return (t_inp); 1762 } else { 1763 /* inp is BOUND_V4 no conflict */ 1764 continue; 1765 } 1766 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1767 /* t_inp is bound v4 and v6, conflict always */ 1768 return (t_inp); 1769 } else { 1770 /* t_inp is bound only V4 */ 1771 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1772 SCTP_IPV6_V6ONLY(inp)) { 1773 /* no conflict */ 1774 continue; 1775 } 1776 /* else fall through to conflict */ 1777 } 1778 return (t_inp); 1779 } 1780 return (NULL); 1781 } 1782 1783 1784 int 1785 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1786 { 1787 /* For 1-2-1 with port reuse */ 1788 struct sctppcbhead *head; 1789 struct sctp_inpcb *tinp; 1790 1791 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1792 /* only works with port reuse on */ 1793 return (-1); 1794 } 1795 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1796 return (0); 1797 } 1798 SCTP_INP_RUNLOCK(inp); 1799 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1800 SCTP_BASE_INFO(hashmark))]; 1801 /* Kick out all non-listeners to the TCP hash */ 1802 LIST_FOREACH(tinp, head, sctp_hash) { 1803 if (tinp->sctp_lport != inp->sctp_lport) { 1804 continue; 1805 } 1806 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1807 continue; 1808 } 1809 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1810 continue; 1811 } 1812 if (tinp->sctp_socket->so_qlimit) { 1813 continue; 1814 } 1815 SCTP_INP_WLOCK(tinp); 1816 LIST_REMOVE(tinp, sctp_hash); 1817 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1818 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1819 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1820 SCTP_INP_WUNLOCK(tinp); 1821 } 1822 SCTP_INP_WLOCK(inp); 1823 /* Pull from where he was */ 1824 LIST_REMOVE(inp, sctp_hash); 1825 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1826 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1827 LIST_INSERT_HEAD(head, inp, sctp_hash); 1828 SCTP_INP_WUNLOCK(inp); 1829 SCTP_INP_RLOCK(inp); 1830 return (0); 1831 } 1832 1833 1834 struct sctp_inpcb * 1835 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1836 uint32_t vrf_id) 1837 { 1838 /* 1839 * First we check the hash table to see if someone has this port 1840 * bound with just the port. 1841 */ 1842 struct sctp_inpcb *inp; 1843 struct sctppcbhead *head; 1844 int lport; 1845 unsigned int i; 1846 1847 #ifdef INET 1848 struct sockaddr_in *sin; 1849 1850 #endif 1851 #ifdef INET6 1852 struct sockaddr_in6 *sin6; 1853 1854 #endif 1855 1856 switch (nam->sa_family) { 1857 #ifdef INET 1858 case AF_INET: 1859 sin = (struct sockaddr_in *)nam; 1860 lport = ((struct sockaddr_in *)nam)->sin_port; 1861 break; 1862 #endif 1863 #ifdef INET6 1864 case AF_INET6: 1865 sin6 = (struct sockaddr_in6 *)nam; 1866 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1867 break; 1868 #endif 1869 default: 1870 return (NULL); 1871 } 1872 /* 1873 * I could cheat here and just cast to one of the types but we will 1874 * do it right. It also provides the check against an Unsupported 1875 * type too. 1876 */ 1877 /* Find the head of the ALLADDR chain */ 1878 if (have_lock == 0) { 1879 SCTP_INP_INFO_RLOCK(); 1880 } 1881 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1882 SCTP_BASE_INFO(hashmark))]; 1883 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1884 1885 /* 1886 * If the TCP model exists it could be that the main listening 1887 * endpoint is gone but there still exists a connected socket for 1888 * this guy. If so we can return the first one that we find. This 1889 * may NOT be the correct one so the caller should be wary on the 1890 * returned INP. Currently the only caller that sets find_tcp_pool 1891 * is in bindx where we are verifying that a user CAN bind the 1892 * address. He either has bound it already, or someone else has, or 1893 * its open to bind, so this is good enough. 1894 */ 1895 if (inp == NULL && find_tcp_pool) { 1896 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1897 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1898 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1899 if (inp) { 1900 break; 1901 } 1902 } 1903 } 1904 if (inp) { 1905 SCTP_INP_INCR_REF(inp); 1906 } 1907 if (have_lock == 0) { 1908 SCTP_INP_INFO_RUNLOCK(); 1909 } 1910 return (inp); 1911 } 1912 1913 /* 1914 * Find an association for an endpoint with the pointer to whom you want to 1915 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1916 * need to change the *to to some other struct like a mbuf... 1917 */ 1918 struct sctp_tcb * 1919 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1920 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1921 uint32_t vrf_id) 1922 { 1923 struct sctp_inpcb *inp = NULL; 1924 struct sctp_tcb *retval; 1925 1926 SCTP_INP_INFO_RLOCK(); 1927 if (find_tcp_pool) { 1928 if (inp_p != NULL) { 1929 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1930 vrf_id); 1931 } else { 1932 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1933 vrf_id); 1934 } 1935 if (retval != NULL) { 1936 SCTP_INP_INFO_RUNLOCK(); 1937 return (retval); 1938 } 1939 } 1940 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1941 if (inp_p != NULL) { 1942 *inp_p = inp; 1943 } 1944 SCTP_INP_INFO_RUNLOCK(); 1945 1946 if (inp == NULL) { 1947 return (NULL); 1948 } 1949 /* 1950 * ok, we have an endpoint, now lets find the assoc for it (if any) 1951 * we now place the source address or from in the to of the find 1952 * endpoint call. Since in reality this chain is used from the 1953 * inbound packet side. 1954 */ 1955 if (inp_p != NULL) { 1956 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1957 NULL); 1958 } else { 1959 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1960 NULL); 1961 } 1962 return retval; 1963 } 1964 1965 1966 /* 1967 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1968 * find all addresses that the sender has specified in any address list. Each 1969 * address will be used to lookup the TCB and see if one exits. 1970 */ 1971 static struct sctp_tcb * 1972 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1973 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1974 struct sockaddr *dest) 1975 { 1976 struct sctp_paramhdr *phdr, parm_buf; 1977 struct sctp_tcb *retval; 1978 uint32_t ptype, plen; 1979 1980 #ifdef INET 1981 struct sockaddr_in sin4; 1982 1983 #endif 1984 #ifdef INET6 1985 struct sockaddr_in6 sin6; 1986 1987 #endif 1988 1989 #ifdef INET 1990 memset(&sin4, 0, sizeof(sin4)); 1991 sin4.sin_len = sizeof(sin4); 1992 sin4.sin_family = AF_INET; 1993 sin4.sin_port = sh->src_port; 1994 #endif 1995 #ifdef INET6 1996 memset(&sin6, 0, sizeof(sin6)); 1997 sin6.sin6_len = sizeof(sin6); 1998 sin6.sin6_family = AF_INET6; 1999 sin6.sin6_port = sh->src_port; 2000 #endif 2001 2002 retval = NULL; 2003 offset += sizeof(struct sctp_init_chunk); 2004 2005 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2006 while (phdr != NULL) { 2007 /* now we must see if we want the parameter */ 2008 ptype = ntohs(phdr->param_type); 2009 plen = ntohs(phdr->param_length); 2010 if (plen == 0) { 2011 break; 2012 } 2013 #ifdef INET 2014 if (ptype == SCTP_IPV4_ADDRESS && 2015 plen == sizeof(struct sctp_ipv4addr_param)) { 2016 /* Get the rest of the address */ 2017 struct sctp_ipv4addr_param ip4_parm, *p4; 2018 2019 phdr = sctp_get_next_param(m, offset, 2020 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2021 if (phdr == NULL) { 2022 return (NULL); 2023 } 2024 p4 = (struct sctp_ipv4addr_param *)phdr; 2025 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2026 /* look it up */ 2027 retval = sctp_findassociation_ep_addr(inp_p, 2028 (struct sockaddr *)&sin4, netp, dest, NULL); 2029 if (retval != NULL) { 2030 return (retval); 2031 } 2032 } 2033 #endif 2034 #ifdef INET6 2035 if (ptype == SCTP_IPV6_ADDRESS && 2036 plen == sizeof(struct sctp_ipv6addr_param)) { 2037 /* Get the rest of the address */ 2038 struct sctp_ipv6addr_param ip6_parm, *p6; 2039 2040 phdr = sctp_get_next_param(m, offset, 2041 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2042 if (phdr == NULL) { 2043 return (NULL); 2044 } 2045 p6 = (struct sctp_ipv6addr_param *)phdr; 2046 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2047 /* look it up */ 2048 retval = sctp_findassociation_ep_addr(inp_p, 2049 (struct sockaddr *)&sin6, netp, dest, NULL); 2050 if (retval != NULL) { 2051 return (retval); 2052 } 2053 } 2054 #endif 2055 offset += SCTP_SIZE32(plen); 2056 phdr = sctp_get_next_param(m, offset, &parm_buf, 2057 sizeof(parm_buf)); 2058 } 2059 return (NULL); 2060 } 2061 2062 static struct sctp_tcb * 2063 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2064 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2065 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2066 { 2067 /* 2068 * Use my vtag to hash. If we find it we then verify the source addr 2069 * is in the assoc. If all goes well we save a bit on rec of a 2070 * packet. 2071 */ 2072 struct sctpasochead *head; 2073 struct sctp_nets *net; 2074 struct sctp_tcb *stcb; 2075 2076 *netp = NULL; 2077 *inp_p = NULL; 2078 SCTP_INP_INFO_RLOCK(); 2079 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2080 SCTP_BASE_INFO(hashasocmark))]; 2081 if (head == NULL) { 2082 /* invalid vtag */ 2083 SCTP_INP_INFO_RUNLOCK(); 2084 return (NULL); 2085 } 2086 LIST_FOREACH(stcb, head, sctp_asocs) { 2087 SCTP_INP_RLOCK(stcb->sctp_ep); 2088 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2089 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2090 continue; 2091 } 2092 SCTP_TCB_LOCK(stcb); 2093 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2094 if (stcb->asoc.my_vtag == vtag) { 2095 /* candidate */ 2096 if (stcb->rport != rport) { 2097 SCTP_TCB_UNLOCK(stcb); 2098 continue; 2099 } 2100 if (stcb->sctp_ep->sctp_lport != lport) { 2101 SCTP_TCB_UNLOCK(stcb); 2102 continue; 2103 } 2104 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2105 SCTP_TCB_UNLOCK(stcb); 2106 continue; 2107 } 2108 /* RRS:Need toaddr check here */ 2109 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2110 /* Endpoint does not own this address */ 2111 SCTP_TCB_UNLOCK(stcb); 2112 continue; 2113 } 2114 if (remote_tag) { 2115 /* 2116 * If we have both vtags that's all we match 2117 * on 2118 */ 2119 if (stcb->asoc.peer_vtag == remote_tag) { 2120 /* 2121 * If both tags match we consider it 2122 * conclusive and check NO 2123 * source/destination addresses 2124 */ 2125 goto conclusive; 2126 } 2127 } 2128 if (skip_src_check) { 2129 conclusive: 2130 if (from) { 2131 net = sctp_findnet(stcb, from); 2132 } else { 2133 *netp = NULL; /* unknown */ 2134 } 2135 if (inp_p) 2136 *inp_p = stcb->sctp_ep; 2137 SCTP_INP_INFO_RUNLOCK(); 2138 return (stcb); 2139 } 2140 net = sctp_findnet(stcb, from); 2141 if (net) { 2142 /* yep its him. */ 2143 *netp = net; 2144 SCTP_STAT_INCR(sctps_vtagexpress); 2145 *inp_p = stcb->sctp_ep; 2146 SCTP_INP_INFO_RUNLOCK(); 2147 return (stcb); 2148 } else { 2149 /* 2150 * not him, this should only happen in rare 2151 * cases so I peg it. 2152 */ 2153 SCTP_STAT_INCR(sctps_vtagbogus); 2154 } 2155 } 2156 SCTP_TCB_UNLOCK(stcb); 2157 } 2158 SCTP_INP_INFO_RUNLOCK(); 2159 return (NULL); 2160 } 2161 2162 /* 2163 * Find an association with the pointer to the inbound IP packet. This can be 2164 * a IPv4 or IPv6 packet. 2165 */ 2166 struct sctp_tcb * 2167 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 2168 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2169 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2170 { 2171 int find_tcp_pool; 2172 struct ip *iph; 2173 struct sctp_tcb *retval; 2174 struct sockaddr_storage to_store, from_store; 2175 struct sockaddr *to = (struct sockaddr *)&to_store; 2176 struct sockaddr *from = (struct sockaddr *)&from_store; 2177 struct sctp_inpcb *inp; 2178 2179 iph = mtod(m, struct ip *); 2180 switch (iph->ip_v) { 2181 #ifdef INET 2182 case IPVERSION: 2183 { 2184 /* its IPv4 */ 2185 struct sockaddr_in *from4; 2186 2187 from4 = (struct sockaddr_in *)&from_store; 2188 bzero(from4, sizeof(*from4)); 2189 from4->sin_family = AF_INET; 2190 from4->sin_len = sizeof(struct sockaddr_in); 2191 from4->sin_addr.s_addr = iph->ip_src.s_addr; 2192 from4->sin_port = sh->src_port; 2193 break; 2194 } 2195 #endif 2196 #ifdef INET6 2197 case IPV6_VERSION >> 4: 2198 { 2199 /* its IPv6 */ 2200 struct ip6_hdr *ip6; 2201 struct sockaddr_in6 *from6; 2202 2203 ip6 = mtod(m, struct ip6_hdr *); 2204 from6 = (struct sockaddr_in6 *)&from_store; 2205 bzero(from6, sizeof(*from6)); 2206 from6->sin6_family = AF_INET6; 2207 from6->sin6_len = sizeof(struct sockaddr_in6); 2208 from6->sin6_addr = ip6->ip6_src; 2209 from6->sin6_port = sh->src_port; 2210 /* Get the scopes in properly to the sin6 addr's */ 2211 /* we probably don't need these operations */ 2212 (void)sa6_recoverscope(from6); 2213 sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone)); 2214 break; 2215 } 2216 #endif 2217 default: 2218 /* Currently not supported. */ 2219 return (NULL); 2220 } 2221 2222 2223 switch (iph->ip_v) { 2224 #ifdef INET 2225 case IPVERSION: 2226 { 2227 /* its IPv4 */ 2228 struct sockaddr_in *to4; 2229 2230 to4 = (struct sockaddr_in *)&to_store; 2231 bzero(to4, sizeof(*to4)); 2232 to4->sin_family = AF_INET; 2233 to4->sin_len = sizeof(struct sockaddr_in); 2234 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 2235 to4->sin_port = sh->dest_port; 2236 break; 2237 } 2238 #endif 2239 #ifdef INET6 2240 case IPV6_VERSION >> 4: 2241 { 2242 /* its IPv6 */ 2243 struct ip6_hdr *ip6; 2244 struct sockaddr_in6 *to6; 2245 2246 ip6 = mtod(m, struct ip6_hdr *); 2247 to6 = (struct sockaddr_in6 *)&to_store; 2248 bzero(to6, sizeof(*to6)); 2249 to6->sin6_family = AF_INET6; 2250 to6->sin6_len = sizeof(struct sockaddr_in6); 2251 to6->sin6_addr = ip6->ip6_dst; 2252 to6->sin6_port = sh->dest_port; 2253 /* Get the scopes in properly to the sin6 addr's */ 2254 /* we probably don't need these operations */ 2255 (void)sa6_recoverscope(to6); 2256 sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone)); 2257 break; 2258 } 2259 #endif 2260 default: 2261 /* TSNH */ 2262 break; 2263 } 2264 if (sh->v_tag) { 2265 /* we only go down this path if vtag is non-zero */ 2266 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag), 2267 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2268 if (retval) { 2269 return (retval); 2270 } 2271 } 2272 find_tcp_pool = 0; 2273 if ((ch->chunk_type != SCTP_INITIATION) && 2274 (ch->chunk_type != SCTP_INITIATION_ACK) && 2275 (ch->chunk_type != SCTP_COOKIE_ACK) && 2276 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2277 /* Other chunk types go to the tcp pool. */ 2278 find_tcp_pool = 1; 2279 } 2280 if (inp_p) { 2281 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 2282 find_tcp_pool, vrf_id); 2283 inp = *inp_p; 2284 } else { 2285 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 2286 find_tcp_pool, vrf_id); 2287 } 2288 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2289 if (retval == NULL && inp) { 2290 /* Found a EP but not this address */ 2291 if ((ch->chunk_type == SCTP_INITIATION) || 2292 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2293 /*- 2294 * special hook, we do NOT return linp or an 2295 * association that is linked to an existing 2296 * association that is under the TCP pool (i.e. no 2297 * listener exists). The endpoint finding routine 2298 * will always find a listener before examining the 2299 * TCP pool. 2300 */ 2301 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2302 if (inp_p) { 2303 *inp_p = NULL; 2304 } 2305 return (NULL); 2306 } 2307 retval = sctp_findassociation_special_addr(m, iphlen, 2308 offset, sh, &inp, netp, to); 2309 if (inp_p != NULL) { 2310 *inp_p = inp; 2311 } 2312 } 2313 } 2314 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2315 return (retval); 2316 } 2317 2318 /* 2319 * lookup an association by an ASCONF lookup address. 2320 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2321 */ 2322 struct sctp_tcb * 2323 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 2324 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2325 { 2326 struct sctp_tcb *stcb; 2327 struct sockaddr_storage local_store, remote_store; 2328 struct sockaddr *to; 2329 struct ip *iph; 2330 struct sctp_paramhdr parm_buf, *phdr; 2331 int ptype; 2332 int zero_address = 0; 2333 2334 #ifdef INET 2335 struct sockaddr_in *sin; 2336 2337 #endif 2338 #ifdef INET6 2339 struct ip6_hdr *ip6; 2340 struct sockaddr_in6 *sin6; 2341 2342 #endif 2343 2344 memset(&local_store, 0, sizeof(local_store)); 2345 memset(&remote_store, 0, sizeof(remote_store)); 2346 to = (struct sockaddr *)&local_store; 2347 /* First get the destination address setup too. */ 2348 iph = mtod(m, struct ip *); 2349 switch (iph->ip_v) { 2350 #ifdef INET 2351 case IPVERSION: 2352 /* its IPv4 */ 2353 sin = (struct sockaddr_in *)&local_store; 2354 sin->sin_family = AF_INET; 2355 sin->sin_len = sizeof(*sin); 2356 sin->sin_port = sh->dest_port; 2357 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 2358 break; 2359 #endif 2360 #ifdef INET6 2361 case IPV6_VERSION >> 4: 2362 /* its IPv6 */ 2363 ip6 = mtod(m, struct ip6_hdr *); 2364 sin6 = (struct sockaddr_in6 *)&local_store; 2365 sin6->sin6_family = AF_INET6; 2366 sin6->sin6_len = sizeof(*sin6); 2367 sin6->sin6_port = sh->dest_port; 2368 sin6->sin6_addr = ip6->ip6_dst; 2369 break; 2370 #endif 2371 default: 2372 return NULL; 2373 } 2374 2375 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2376 &parm_buf, sizeof(struct sctp_paramhdr)); 2377 if (phdr == NULL) { 2378 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2379 __FUNCTION__); 2380 return NULL; 2381 } 2382 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2383 /* get the correlation address */ 2384 switch (ptype) { 2385 #ifdef INET6 2386 case SCTP_IPV6_ADDRESS: 2387 { 2388 /* ipv6 address param */ 2389 struct sctp_ipv6addr_param *p6, p6_buf; 2390 2391 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2392 return NULL; 2393 } 2394 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2395 offset + sizeof(struct sctp_asconf_chunk), 2396 &p6_buf.ph, sizeof(*p6)); 2397 if (p6 == NULL) { 2398 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2399 __FUNCTION__); 2400 return (NULL); 2401 } 2402 sin6 = (struct sockaddr_in6 *)&remote_store; 2403 sin6->sin6_family = AF_INET6; 2404 sin6->sin6_len = sizeof(*sin6); 2405 sin6->sin6_port = sh->src_port; 2406 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2407 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2408 zero_address = 1; 2409 break; 2410 } 2411 #endif 2412 #ifdef INET 2413 case SCTP_IPV4_ADDRESS: 2414 { 2415 /* ipv4 address param */ 2416 struct sctp_ipv4addr_param *p4, p4_buf; 2417 2418 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2419 return NULL; 2420 } 2421 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2422 offset + sizeof(struct sctp_asconf_chunk), 2423 &p4_buf.ph, sizeof(*p4)); 2424 if (p4 == NULL) { 2425 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2426 __FUNCTION__); 2427 return (NULL); 2428 } 2429 sin = (struct sockaddr_in *)&remote_store; 2430 sin->sin_family = AF_INET; 2431 sin->sin_len = sizeof(*sin); 2432 sin->sin_port = sh->src_port; 2433 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2434 if (sin->sin_addr.s_addr == INADDR_ANY) 2435 zero_address = 1; 2436 break; 2437 } 2438 #endif 2439 default: 2440 /* invalid address param type */ 2441 return NULL; 2442 } 2443 2444 if (zero_address) { 2445 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p, 2446 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2447 /* 2448 * printf("findassociation_ep_asconf: zero lookup address 2449 * finds stcb 0x%x\n", (uint32_t)stcb); 2450 */ 2451 } else { 2452 stcb = sctp_findassociation_ep_addr(inp_p, 2453 (struct sockaddr *)&remote_store, netp, 2454 to, NULL); 2455 } 2456 return (stcb); 2457 } 2458 2459 2460 /* 2461 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2462 * addresses. This way if we don't get a bind we by default pick a ephemeral 2463 * port with all addresses bound. 2464 */ 2465 int 2466 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2467 { 2468 /* 2469 * we get called when a new endpoint starts up. We need to allocate 2470 * the sctp_inpcb structure from the zone and init it. Mark it as 2471 * unbound and find a port that we can use as an ephemeral with 2472 * INADDR_ANY. If the user binds later no problem we can then add in 2473 * the specific addresses. And setup the default parameters for the 2474 * EP. 2475 */ 2476 int i, error; 2477 struct sctp_inpcb *inp; 2478 struct sctp_pcb *m; 2479 struct timeval time; 2480 sctp_sharedkey_t *null_key; 2481 2482 error = 0; 2483 2484 SCTP_INP_INFO_WLOCK(); 2485 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2486 if (inp == NULL) { 2487 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2488 SCTP_INP_INFO_WUNLOCK(); 2489 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2490 return (ENOBUFS); 2491 } 2492 /* zap it */ 2493 bzero(inp, sizeof(*inp)); 2494 2495 /* bump generations */ 2496 /* setup socket pointers */ 2497 inp->sctp_socket = so; 2498 inp->ip_inp.inp.inp_socket = so; 2499 #ifdef INET6 2500 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2501 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2502 } 2503 #endif 2504 inp->sctp_associd_counter = 1; 2505 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2506 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2507 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2508 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2509 /* init the small hash table we use to track asocid <-> tcb */ 2510 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2511 if (inp->sctp_asocidhash == NULL) { 2512 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2513 SCTP_INP_INFO_WUNLOCK(); 2514 return (ENOBUFS); 2515 } 2516 #ifdef IPSEC 2517 { 2518 struct inpcbpolicy *pcb_sp = NULL; 2519 2520 error = ipsec_init_policy(so, &pcb_sp); 2521 /* Arrange to share the policy */ 2522 inp->ip_inp.inp.inp_sp = pcb_sp; 2523 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2524 } 2525 if (error != 0) { 2526 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2527 SCTP_INP_INFO_WUNLOCK(); 2528 return error; 2529 } 2530 #endif /* IPSEC */ 2531 SCTP_INCR_EP_COUNT(); 2532 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2533 SCTP_INP_INFO_WUNLOCK(); 2534 2535 so->so_pcb = (caddr_t)inp; 2536 2537 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2538 /* UDP style socket */ 2539 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2540 SCTP_PCB_FLAGS_UNBOUND); 2541 /* Be sure it is NON-BLOCKING IO for UDP */ 2542 /* SCTP_SET_SO_NBIO(so); */ 2543 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2544 /* TCP style socket */ 2545 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2546 SCTP_PCB_FLAGS_UNBOUND); 2547 /* Be sure we have blocking IO by default */ 2548 SCTP_CLEAR_SO_NBIO(so); 2549 } else { 2550 /* 2551 * unsupported socket type (RAW, etc)- in case we missed it 2552 * in protosw 2553 */ 2554 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2555 so->so_pcb = NULL; 2556 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2557 return (EOPNOTSUPP); 2558 } 2559 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2560 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2561 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2562 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2563 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2564 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2565 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2566 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2567 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2568 } 2569 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2570 &inp->sctp_hashmark); 2571 if (inp->sctp_tcbhash == NULL) { 2572 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2573 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2574 so->so_pcb = NULL; 2575 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2576 return (ENOBUFS); 2577 } 2578 inp->def_vrf_id = vrf_id; 2579 2580 SCTP_INP_INFO_WLOCK(); 2581 SCTP_INP_LOCK_INIT(inp); 2582 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2583 SCTP_INP_READ_INIT(inp); 2584 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2585 /* lock the new ep */ 2586 SCTP_INP_WLOCK(inp); 2587 2588 /* add it to the info area */ 2589 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2590 SCTP_INP_INFO_WUNLOCK(); 2591 2592 TAILQ_INIT(&inp->read_queue); 2593 LIST_INIT(&inp->sctp_addr_list); 2594 2595 LIST_INIT(&inp->sctp_asoc_list); 2596 2597 #ifdef SCTP_TRACK_FREED_ASOCS 2598 /* TEMP CODE */ 2599 LIST_INIT(&inp->sctp_asoc_free_list); 2600 #endif 2601 /* Init the timer structure for signature change */ 2602 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2603 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2604 2605 /* now init the actual endpoint default data */ 2606 m = &inp->sctp_ep; 2607 2608 /* setup the base timeout information */ 2609 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2610 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2611 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2612 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2613 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2614 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2615 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2616 /* all max/min max are in ms */ 2617 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2618 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2619 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2620 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2621 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2622 2623 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2624 2625 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2626 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2627 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2628 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2629 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2630 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2631 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2632 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2633 2634 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2635 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2636 /* number of streams to pre-open on a association */ 2637 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2638 2639 /* Add adaptation cookie */ 2640 m->adaptation_layer_indicator = 0x504C5253; 2641 2642 /* seed random number generator */ 2643 m->random_counter = 1; 2644 m->store_at = SCTP_SIGNATURE_SIZE; 2645 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2646 sctp_fill_random_store(m); 2647 2648 /* Minimum cookie size */ 2649 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2650 sizeof(struct sctp_state_cookie); 2651 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2652 2653 /* Setup the initial secret */ 2654 (void)SCTP_GETTIME_TIMEVAL(&time); 2655 m->time_of_secret_change = time.tv_sec; 2656 2657 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2658 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2659 } 2660 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2661 2662 /* How long is a cookie good for ? */ 2663 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2664 /* 2665 * Initialize authentication parameters 2666 */ 2667 m->local_hmacs = sctp_default_supported_hmaclist(); 2668 m->local_auth_chunks = sctp_alloc_chunklist(); 2669 m->default_dscp = 0; 2670 #ifdef INET6 2671 m->default_flowlabel = 0; 2672 #endif 2673 sctp_auth_set_default_chunks(m->local_auth_chunks); 2674 LIST_INIT(&m->shared_keys); 2675 /* add default NULL key as key id 0 */ 2676 null_key = sctp_alloc_sharedkey(); 2677 sctp_insert_sharedkey(&m->shared_keys, null_key); 2678 SCTP_INP_WUNLOCK(inp); 2679 #ifdef SCTP_LOG_CLOSING 2680 sctp_log_closing(inp, NULL, 12); 2681 #endif 2682 return (error); 2683 } 2684 2685 2686 void 2687 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2688 struct sctp_tcb *stcb) 2689 { 2690 struct sctp_nets *net; 2691 uint16_t lport, rport; 2692 struct sctppcbhead *head; 2693 struct sctp_laddr *laddr, *oladdr; 2694 2695 atomic_add_int(&stcb->asoc.refcnt, 1); 2696 SCTP_TCB_UNLOCK(stcb); 2697 SCTP_INP_INFO_WLOCK(); 2698 SCTP_INP_WLOCK(old_inp); 2699 SCTP_INP_WLOCK(new_inp); 2700 SCTP_TCB_LOCK(stcb); 2701 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2702 2703 new_inp->sctp_ep.time_of_secret_change = 2704 old_inp->sctp_ep.time_of_secret_change; 2705 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2706 sizeof(old_inp->sctp_ep.secret_key)); 2707 new_inp->sctp_ep.current_secret_number = 2708 old_inp->sctp_ep.current_secret_number; 2709 new_inp->sctp_ep.last_secret_number = 2710 old_inp->sctp_ep.last_secret_number; 2711 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2712 2713 /* make it so new data pours into the new socket */ 2714 stcb->sctp_socket = new_inp->sctp_socket; 2715 stcb->sctp_ep = new_inp; 2716 2717 /* Copy the port across */ 2718 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2719 rport = stcb->rport; 2720 /* Pull the tcb from the old association */ 2721 LIST_REMOVE(stcb, sctp_tcbhash); 2722 LIST_REMOVE(stcb, sctp_tcblist); 2723 if (stcb->asoc.in_asocid_hash) { 2724 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2725 } 2726 /* Now insert the new_inp into the TCP connected hash */ 2727 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2728 2729 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2730 /* Its safe to access */ 2731 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2732 2733 /* Now move the tcb into the endpoint list */ 2734 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2735 /* 2736 * Question, do we even need to worry about the ep-hash since we 2737 * only have one connection? Probably not :> so lets get rid of it 2738 * and not suck up any kernel memory in that. 2739 */ 2740 if (stcb->asoc.in_asocid_hash) { 2741 struct sctpasochead *lhd; 2742 2743 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2744 new_inp->hashasocidmark)]; 2745 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2746 } 2747 /* Ok. Let's restart timer. */ 2748 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2749 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2750 stcb, net); 2751 } 2752 2753 SCTP_INP_INFO_WUNLOCK(); 2754 if (new_inp->sctp_tcbhash != NULL) { 2755 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2756 new_inp->sctp_tcbhash = NULL; 2757 } 2758 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2759 /* Subset bound, so copy in the laddr list from the old_inp */ 2760 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2761 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2762 if (laddr == NULL) { 2763 /* 2764 * Gak, what can we do? This assoc is really 2765 * HOSED. We probably should send an abort 2766 * here. 2767 */ 2768 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2769 continue; 2770 } 2771 SCTP_INCR_LADDR_COUNT(); 2772 bzero(laddr, sizeof(*laddr)); 2773 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2774 laddr->ifa = oladdr->ifa; 2775 atomic_add_int(&laddr->ifa->refcount, 1); 2776 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2777 sctp_nxt_addr); 2778 new_inp->laddr_count++; 2779 if (oladdr == stcb->asoc.last_used_address) { 2780 stcb->asoc.last_used_address = laddr; 2781 } 2782 } 2783 } 2784 /* 2785 * Now any running timers need to be adjusted since we really don't 2786 * care if they are running or not just blast in the new_inp into 2787 * all of them. 2788 */ 2789 2790 stcb->asoc.dack_timer.ep = (void *)new_inp; 2791 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2792 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2793 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2794 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2795 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2796 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2797 /* now what about the nets? */ 2798 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2799 net->pmtu_timer.ep = (void *)new_inp; 2800 net->hb_timer.ep = (void *)new_inp; 2801 net->rxt_timer.ep = (void *)new_inp; 2802 } 2803 SCTP_INP_WUNLOCK(new_inp); 2804 SCTP_INP_WUNLOCK(old_inp); 2805 } 2806 2807 2808 2809 2810 /* sctp_ifap is used to bypass normal local address validation checks */ 2811 int 2812 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2813 struct sctp_ifa *sctp_ifap, struct thread *p) 2814 { 2815 /* bind a ep to a socket address */ 2816 struct sctppcbhead *head; 2817 struct sctp_inpcb *inp, *inp_tmp; 2818 struct inpcb *ip_inp; 2819 int port_reuse_active = 0; 2820 int bindall; 2821 uint16_t lport; 2822 int error; 2823 uint32_t vrf_id; 2824 2825 lport = 0; 2826 error = 0; 2827 bindall = 1; 2828 inp = (struct sctp_inpcb *)so->so_pcb; 2829 ip_inp = (struct inpcb *)so->so_pcb; 2830 #ifdef SCTP_DEBUG 2831 if (addr) { 2832 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2833 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2834 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2835 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2836 } 2837 #endif 2838 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2839 /* already did a bind, subsequent binds NOT allowed ! */ 2840 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2841 return (EINVAL); 2842 } 2843 #ifdef INVARIANTS 2844 if (p == NULL) 2845 panic("null proc/thread"); 2846 #endif 2847 if (addr != NULL) { 2848 switch (addr->sa_family) { 2849 #ifdef INET 2850 case AF_INET: 2851 { 2852 struct sockaddr_in *sin; 2853 2854 /* IPV6_V6ONLY socket? */ 2855 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2856 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2857 return (EINVAL); 2858 } 2859 if (addr->sa_len != sizeof(*sin)) { 2860 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2861 return (EINVAL); 2862 } 2863 sin = (struct sockaddr_in *)addr; 2864 lport = sin->sin_port; 2865 /* 2866 * For LOOPBACK the prison_local_ip4() call 2867 * will transmute the ip address to the 2868 * proper value. 2869 */ 2870 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2871 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2872 return (error); 2873 } 2874 if (sin->sin_addr.s_addr != INADDR_ANY) { 2875 bindall = 0; 2876 } 2877 break; 2878 } 2879 #endif 2880 #ifdef INET6 2881 case AF_INET6: 2882 { 2883 /* 2884 * Only for pure IPv6 Address. (No IPv4 2885 * Mapped!) 2886 */ 2887 struct sockaddr_in6 *sin6; 2888 2889 sin6 = (struct sockaddr_in6 *)addr; 2890 2891 if (addr->sa_len != sizeof(*sin6)) { 2892 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2893 return (EINVAL); 2894 } 2895 lport = sin6->sin6_port; 2896 2897 /* 2898 * For LOOPBACK the prison_local_ip6() call 2899 * will transmute the ipv6 address to the 2900 * proper value. 2901 */ 2902 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2903 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2904 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2905 return (error); 2906 } 2907 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2908 bindall = 0; 2909 /* KAME hack: embed scopeid */ 2910 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2911 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2912 return (EINVAL); 2913 } 2914 } 2915 /* this must be cleared for ifa_ifwithaddr() */ 2916 sin6->sin6_scope_id = 0; 2917 break; 2918 } 2919 #endif 2920 default: 2921 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2922 return (EAFNOSUPPORT); 2923 } 2924 } 2925 SCTP_INP_INFO_WLOCK(); 2926 SCTP_INP_WLOCK(inp); 2927 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2928 vrf_id = inp->def_vrf_id; 2929 2930 /* increase our count due to the unlock we do */ 2931 SCTP_INP_INCR_REF(inp); 2932 if (lport) { 2933 /* 2934 * Did the caller specify a port? if so we must see if a ep 2935 * already has this one bound. 2936 */ 2937 /* got to be root to get at low ports */ 2938 if (ntohs(lport) < IPPORT_RESERVED) { 2939 if (p && (error = 2940 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2941 )) { 2942 SCTP_INP_DECR_REF(inp); 2943 SCTP_INP_WUNLOCK(inp); 2944 SCTP_INP_INFO_WUNLOCK(); 2945 return (error); 2946 } 2947 } 2948 if (p == NULL) { 2949 SCTP_INP_DECR_REF(inp); 2950 SCTP_INP_WUNLOCK(inp); 2951 SCTP_INP_INFO_WUNLOCK(); 2952 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2953 return (error); 2954 } 2955 SCTP_INP_WUNLOCK(inp); 2956 if (bindall) { 2957 vrf_id = inp->def_vrf_id; 2958 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2959 if (inp_tmp != NULL) { 2960 /* 2961 * lock guy returned and lower count note 2962 * that we are not bound so inp_tmp should 2963 * NEVER be inp. And it is this inp 2964 * (inp_tmp) that gets the reference bump, 2965 * so we must lower it. 2966 */ 2967 SCTP_INP_DECR_REF(inp_tmp); 2968 /* unlock info */ 2969 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2970 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2971 /* 2972 * Ok, must be one-2-one and 2973 * allowing port re-use 2974 */ 2975 port_reuse_active = 1; 2976 goto continue_anyway; 2977 } 2978 SCTP_INP_DECR_REF(inp); 2979 SCTP_INP_INFO_WUNLOCK(); 2980 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2981 return (EADDRINUSE); 2982 } 2983 } else { 2984 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2985 if (inp_tmp != NULL) { 2986 /* 2987 * lock guy returned and lower count note 2988 * that we are not bound so inp_tmp should 2989 * NEVER be inp. And it is this inp 2990 * (inp_tmp) that gets the reference bump, 2991 * so we must lower it. 2992 */ 2993 SCTP_INP_DECR_REF(inp_tmp); 2994 /* unlock info */ 2995 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2996 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2997 /* 2998 * Ok, must be one-2-one and 2999 * allowing port re-use 3000 */ 3001 port_reuse_active = 1; 3002 goto continue_anyway; 3003 } 3004 SCTP_INP_DECR_REF(inp); 3005 SCTP_INP_INFO_WUNLOCK(); 3006 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3007 return (EADDRINUSE); 3008 } 3009 } 3010 continue_anyway: 3011 SCTP_INP_WLOCK(inp); 3012 if (bindall) { 3013 /* verify that no lport is not used by a singleton */ 3014 if ((port_reuse_active == 0) && 3015 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 3016 ) { 3017 /* Sorry someone already has this one bound */ 3018 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3019 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3020 port_reuse_active = 1; 3021 } else { 3022 SCTP_INP_DECR_REF(inp); 3023 SCTP_INP_WUNLOCK(inp); 3024 SCTP_INP_INFO_WUNLOCK(); 3025 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3026 return (EADDRINUSE); 3027 } 3028 } 3029 } 3030 } else { 3031 uint16_t first, last, candidate; 3032 uint16_t count; 3033 int done; 3034 3035 if (ip_inp->inp_flags & INP_HIGHPORT) { 3036 first = MODULE_GLOBAL(ipport_hifirstauto); 3037 last = MODULE_GLOBAL(ipport_hilastauto); 3038 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3039 if (p && (error = 3040 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3041 )) { 3042 SCTP_INP_DECR_REF(inp); 3043 SCTP_INP_WUNLOCK(inp); 3044 SCTP_INP_INFO_WUNLOCK(); 3045 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3046 return (error); 3047 } 3048 first = MODULE_GLOBAL(ipport_lowfirstauto); 3049 last = MODULE_GLOBAL(ipport_lowlastauto); 3050 } else { 3051 first = MODULE_GLOBAL(ipport_firstauto); 3052 last = MODULE_GLOBAL(ipport_lastauto); 3053 } 3054 if (first > last) { 3055 uint16_t temp; 3056 3057 temp = first; 3058 first = last; 3059 last = temp; 3060 } 3061 count = last - first + 1; /* number of candidates */ 3062 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3063 3064 done = 0; 3065 while (!done) { 3066 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3067 done = 1; 3068 } 3069 if (!done) { 3070 if (--count == 0) { 3071 SCTP_INP_DECR_REF(inp); 3072 SCTP_INP_WUNLOCK(inp); 3073 SCTP_INP_INFO_WUNLOCK(); 3074 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3075 return (EADDRINUSE); 3076 } 3077 if (candidate == last) 3078 candidate = first; 3079 else 3080 candidate = candidate + 1; 3081 } 3082 } 3083 lport = htons(candidate); 3084 } 3085 SCTP_INP_DECR_REF(inp); 3086 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3087 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3088 /* 3089 * this really should not happen. The guy did a non-blocking 3090 * bind and then did a close at the same time. 3091 */ 3092 SCTP_INP_WUNLOCK(inp); 3093 SCTP_INP_INFO_WUNLOCK(); 3094 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3095 return (EINVAL); 3096 } 3097 /* ok we look clear to give out this port, so lets setup the binding */ 3098 if (bindall) { 3099 /* binding to all addresses, so just set in the proper flags */ 3100 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3101 /* set the automatic addr changes from kernel flag */ 3102 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3103 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3104 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3105 } else { 3106 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3107 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3108 } 3109 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3110 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3111 } else { 3112 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3113 } 3114 /* 3115 * set the automatic mobility_base from kernel flag (by 3116 * micchie) 3117 */ 3118 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3119 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3120 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3121 } else { 3122 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3123 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3124 } 3125 /* 3126 * set the automatic mobility_fasthandoff from kernel flag 3127 * (by micchie) 3128 */ 3129 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3130 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3131 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3132 } else { 3133 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3134 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3135 } 3136 } else { 3137 /* 3138 * bind specific, make sure flags is off and add a new 3139 * address structure to the sctp_addr_list inside the ep 3140 * structure. 3141 * 3142 * We will need to allocate one and insert it at the head. The 3143 * socketopt call can just insert new addresses in there as 3144 * well. It will also have to do the embed scope kame hack 3145 * too (before adding). 3146 */ 3147 struct sctp_ifa *ifa; 3148 struct sockaddr_storage store_sa; 3149 3150 memset(&store_sa, 0, sizeof(store_sa)); 3151 switch (addr->sa_family) { 3152 case AF_INET: 3153 { 3154 struct sockaddr_in *sin; 3155 3156 sin = (struct sockaddr_in *)&store_sa; 3157 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3158 sin->sin_port = 0; 3159 break; 3160 } 3161 case AF_INET6: 3162 { 3163 struct sockaddr_in6 *sin6; 3164 3165 sin6 = (struct sockaddr_in6 *)&store_sa; 3166 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3167 sin6->sin6_port = 0; 3168 break; 3169 } 3170 default: 3171 break; 3172 } 3173 /* 3174 * first find the interface with the bound address need to 3175 * zero out the port to find the address! yuck! can't do 3176 * this earlier since need port for sctp_pcb_findep() 3177 */ 3178 if (sctp_ifap != NULL) 3179 ifa = sctp_ifap; 3180 else { 3181 /* 3182 * Note for BSD we hit here always other O/S's will 3183 * pass things in via the sctp_ifap argument 3184 * (Panda). 3185 */ 3186 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3187 vrf_id, SCTP_ADDR_NOT_LOCKED); 3188 } 3189 if (ifa == NULL) { 3190 /* Can't find an interface with that address */ 3191 SCTP_INP_WUNLOCK(inp); 3192 SCTP_INP_INFO_WUNLOCK(); 3193 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3194 return (EADDRNOTAVAIL); 3195 } 3196 #ifdef INET6 3197 if (addr->sa_family == AF_INET6) { 3198 /* GAK, more FIXME IFA lock? */ 3199 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3200 /* Can't bind a non-existent addr. */ 3201 SCTP_INP_WUNLOCK(inp); 3202 SCTP_INP_INFO_WUNLOCK(); 3203 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3204 return (EINVAL); 3205 } 3206 } 3207 #endif 3208 /* we're not bound all */ 3209 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3210 /* allow bindx() to send ASCONF's for binding changes */ 3211 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3212 /* clear automatic addr changes from kernel flag */ 3213 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3214 3215 /* add this address to the endpoint list */ 3216 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3217 if (error != 0) { 3218 SCTP_INP_WUNLOCK(inp); 3219 SCTP_INP_INFO_WUNLOCK(); 3220 return (error); 3221 } 3222 inp->laddr_count++; 3223 } 3224 /* find the bucket */ 3225 if (port_reuse_active) { 3226 /* Put it into tcp 1-2-1 hash */ 3227 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3228 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3229 } else { 3230 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3231 } 3232 /* put it in the bucket */ 3233 LIST_INSERT_HEAD(head, inp, sctp_hash); 3234 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3235 head, ntohs(lport), port_reuse_active); 3236 /* set in the port */ 3237 inp->sctp_lport = lport; 3238 3239 /* turn off just the unbound flag */ 3240 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3241 SCTP_INP_WUNLOCK(inp); 3242 SCTP_INP_INFO_WUNLOCK(); 3243 return (0); 3244 } 3245 3246 3247 static void 3248 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3249 { 3250 struct sctp_iterator *it, *nit; 3251 3252 /* 3253 * We enter with the only the ITERATOR_LOCK in place and a write 3254 * lock on the inp_info stuff. 3255 */ 3256 it = sctp_it_ctl.cur_it; 3257 if (it && (it->vn != curvnet)) { 3258 /* Its not looking at our VNET */ 3259 return; 3260 } 3261 if (it && (it->inp == inp)) { 3262 /* 3263 * This is tricky and we hold the iterator lock, but when it 3264 * returns and gets the lock (when we release it) the 3265 * iterator will try to operate on inp. We need to stop that 3266 * from happening. But of course the iterator has a 3267 * reference on the stcb and inp. We can mark it and it will 3268 * stop. 3269 * 3270 * If its a single iterator situation, we set the end iterator 3271 * flag. Otherwise we set the iterator to go to the next 3272 * inp. 3273 * 3274 */ 3275 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3276 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3277 } else { 3278 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3279 } 3280 } 3281 /* 3282 * Now go through and remove any single reference to our inp that 3283 * may be still pending on the list 3284 */ 3285 SCTP_IPI_ITERATOR_WQ_LOCK(); 3286 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3287 if (it->vn != curvnet) { 3288 continue; 3289 } 3290 if (it->inp == inp) { 3291 /* This one points to me is it inp specific? */ 3292 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3293 /* Remove and free this one */ 3294 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3295 it, sctp_nxt_itr); 3296 if (it->function_atend != NULL) { 3297 (*it->function_atend) (it->pointer, it->val); 3298 } 3299 SCTP_FREE(it, SCTP_M_ITER); 3300 } else { 3301 it->inp = LIST_NEXT(it->inp, sctp_list); 3302 if (it->inp) { 3303 SCTP_INP_INCR_REF(it->inp); 3304 } 3305 } 3306 /* 3307 * When its put in the refcnt is incremented so decr 3308 * it 3309 */ 3310 SCTP_INP_DECR_REF(inp); 3311 } 3312 } 3313 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3314 } 3315 3316 /* release sctp_inpcb unbind the port */ 3317 void 3318 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3319 { 3320 /* 3321 * Here we free a endpoint. We must find it (if it is in the Hash 3322 * table) and remove it from there. Then we must also find it in the 3323 * overall list and remove it from there. After all removals are 3324 * complete then any timer has to be stopped. Then start the actual 3325 * freeing. a) Any local lists. b) Any associations. c) The hash of 3326 * all associations. d) finally the ep itself. 3327 */ 3328 struct sctp_pcb *m; 3329 struct sctp_tcb *asoc, *nasoc; 3330 struct sctp_laddr *laddr, *nladdr; 3331 struct inpcb *ip_pcb; 3332 struct socket *so; 3333 int being_refed = 0; 3334 struct sctp_queued_to_read *sq, *nsq; 3335 int cnt; 3336 sctp_sharedkey_t *shared_key, *nshared_key; 3337 3338 3339 #ifdef SCTP_LOG_CLOSING 3340 sctp_log_closing(inp, NULL, 0); 3341 #endif 3342 SCTP_ITERATOR_LOCK(); 3343 /* mark any iterators on the list or being processed */ 3344 sctp_iterator_inp_being_freed(inp); 3345 SCTP_ITERATOR_UNLOCK(); 3346 so = inp->sctp_socket; 3347 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3348 /* been here before.. eeks.. get out of here */ 3349 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3350 #ifdef SCTP_LOG_CLOSING 3351 sctp_log_closing(inp, NULL, 1); 3352 #endif 3353 return; 3354 } 3355 SCTP_ASOC_CREATE_LOCK(inp); 3356 SCTP_INP_INFO_WLOCK(); 3357 3358 SCTP_INP_WLOCK(inp); 3359 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3360 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3361 /* socket is gone, so no more wakeups allowed */ 3362 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3363 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3364 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3365 3366 } 3367 /* First time through we have the socket lock, after that no more. */ 3368 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3369 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3370 3371 if (inp->control) { 3372 sctp_m_freem(inp->control); 3373 inp->control = NULL; 3374 } 3375 if (inp->pkt) { 3376 sctp_m_freem(inp->pkt); 3377 inp->pkt = NULL; 3378 } 3379 m = &inp->sctp_ep; 3380 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3381 * here but I will be nice :> (i.e. 3382 * ip_pcb = ep;) */ 3383 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3384 int cnt_in_sd; 3385 3386 cnt_in_sd = 0; 3387 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3388 SCTP_TCB_LOCK(asoc); 3389 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3390 /* Skip guys being freed */ 3391 cnt_in_sd++; 3392 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3393 /* 3394 * Special case - we did not start a 3395 * kill timer on the asoc due to it 3396 * was not closed. So go ahead and 3397 * start it now. 3398 */ 3399 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3400 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3401 } 3402 SCTP_TCB_UNLOCK(asoc); 3403 continue; 3404 } 3405 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3406 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3407 (asoc->asoc.total_output_queue_size == 0)) { 3408 /* 3409 * If we have data in queue, we don't want 3410 * to just free since the app may have done, 3411 * send()/close or connect/send/close. And 3412 * it wants the data to get across first. 3413 */ 3414 /* Just abandon things in the front states */ 3415 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3416 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3417 cnt_in_sd++; 3418 } 3419 continue; 3420 } 3421 /* Disconnect the socket please */ 3422 asoc->sctp_socket = NULL; 3423 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3424 if ((asoc->asoc.size_on_reasm_queue > 0) || 3425 (asoc->asoc.control_pdapi) || 3426 (asoc->asoc.size_on_all_streams > 0) || 3427 (so && (so->so_rcv.sb_cc > 0)) 3428 ) { 3429 /* Left with Data unread */ 3430 struct mbuf *op_err; 3431 3432 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3433 0, M_DONTWAIT, 1, MT_DATA); 3434 if (op_err) { 3435 /* Fill in the user initiated abort */ 3436 struct sctp_paramhdr *ph; 3437 uint32_t *ippp; 3438 3439 SCTP_BUF_LEN(op_err) = 3440 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3441 ph = mtod(op_err, 3442 struct sctp_paramhdr *); 3443 ph->param_type = htons( 3444 SCTP_CAUSE_USER_INITIATED_ABT); 3445 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3446 ippp = (uint32_t *) (ph + 1); 3447 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3448 } 3449 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3450 #if defined(SCTP_PANIC_ON_ABORT) 3451 panic("inpcb_free does an abort"); 3452 #endif 3453 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3454 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3455 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3456 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3457 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3458 } 3459 if (sctp_free_assoc(inp, asoc, 3460 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3461 cnt_in_sd++; 3462 } 3463 continue; 3464 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3465 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3466 (asoc->asoc.stream_queue_cnt == 0) 3467 ) { 3468 if (asoc->asoc.locked_on_sending) { 3469 goto abort_anyway; 3470 } 3471 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3472 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3473 struct sctp_nets *netp; 3474 3475 if (asoc->asoc.alternate) { 3476 netp = asoc->asoc.alternate; 3477 } else { 3478 netp = asoc->asoc.primary_destination; 3479 } 3480 /* 3481 * there is nothing queued to send, 3482 * so I send shutdown 3483 */ 3484 sctp_send_shutdown(asoc, netp); 3485 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3486 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3487 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3488 } 3489 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3490 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3491 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3492 netp); 3493 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3494 asoc->asoc.primary_destination); 3495 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3496 } 3497 } else { 3498 /* mark into shutdown pending */ 3499 struct sctp_stream_queue_pending *sp; 3500 3501 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3502 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3503 asoc->asoc.primary_destination); 3504 if (asoc->asoc.locked_on_sending) { 3505 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3506 sctp_streamhead); 3507 if (sp == NULL) { 3508 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3509 asoc->asoc.locked_on_sending, 3510 asoc->asoc.locked_on_sending->stream_no); 3511 } else { 3512 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3513 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3514 } 3515 } 3516 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3517 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3518 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3519 struct mbuf *op_err; 3520 3521 abort_anyway: 3522 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3523 0, M_DONTWAIT, 1, MT_DATA); 3524 if (op_err) { 3525 /* 3526 * Fill in the user 3527 * initiated abort 3528 */ 3529 struct sctp_paramhdr *ph; 3530 uint32_t *ippp; 3531 3532 SCTP_BUF_LEN(op_err) = 3533 (sizeof(struct sctp_paramhdr) + 3534 sizeof(uint32_t)); 3535 ph = mtod(op_err, 3536 struct sctp_paramhdr *); 3537 ph->param_type = htons( 3538 SCTP_CAUSE_USER_INITIATED_ABT); 3539 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3540 ippp = (uint32_t *) (ph + 1); 3541 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3542 } 3543 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3544 #if defined(SCTP_PANIC_ON_ABORT) 3545 panic("inpcb_free does an abort"); 3546 #endif 3547 3548 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3549 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3550 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3551 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3552 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3553 } 3554 if (sctp_free_assoc(inp, asoc, 3555 SCTP_PCBFREE_NOFORCE, 3556 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3557 cnt_in_sd++; 3558 } 3559 continue; 3560 } else { 3561 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3562 } 3563 } 3564 cnt_in_sd++; 3565 SCTP_TCB_UNLOCK(asoc); 3566 } 3567 /* now is there some left in our SHUTDOWN state? */ 3568 if (cnt_in_sd) { 3569 #ifdef SCTP_LOG_CLOSING 3570 sctp_log_closing(inp, NULL, 2); 3571 #endif 3572 inp->sctp_socket = NULL; 3573 SCTP_INP_WUNLOCK(inp); 3574 SCTP_ASOC_CREATE_UNLOCK(inp); 3575 SCTP_INP_INFO_WUNLOCK(); 3576 return; 3577 } 3578 } 3579 inp->sctp_socket = NULL; 3580 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3581 SCTP_PCB_FLAGS_UNBOUND) { 3582 /* 3583 * ok, this guy has been bound. It's port is somewhere in 3584 * the SCTP_BASE_INFO(hash table). Remove it! 3585 */ 3586 LIST_REMOVE(inp, sctp_hash); 3587 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3588 } 3589 /* 3590 * If there is a timer running to kill us, forget it, since it may 3591 * have a contest on the INP lock.. which would cause us to die ... 3592 */ 3593 cnt = 0; 3594 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3595 SCTP_TCB_LOCK(asoc); 3596 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3597 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3598 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3599 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3600 } 3601 cnt++; 3602 SCTP_TCB_UNLOCK(asoc); 3603 continue; 3604 } 3605 /* Free associations that are NOT killing us */ 3606 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3607 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3608 struct mbuf *op_err; 3609 uint32_t *ippp; 3610 3611 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3612 0, M_DONTWAIT, 1, MT_DATA); 3613 if (op_err) { 3614 /* Fill in the user initiated abort */ 3615 struct sctp_paramhdr *ph; 3616 3617 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3618 sizeof(uint32_t)); 3619 ph = mtod(op_err, struct sctp_paramhdr *); 3620 ph->param_type = htons( 3621 SCTP_CAUSE_USER_INITIATED_ABT); 3622 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3623 ippp = (uint32_t *) (ph + 1); 3624 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3625 3626 } 3627 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3628 #if defined(SCTP_PANIC_ON_ABORT) 3629 panic("inpcb_free does an abort"); 3630 #endif 3631 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3632 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3633 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3634 cnt++; 3635 SCTP_TCB_UNLOCK(asoc); 3636 continue; 3637 } 3638 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3639 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3640 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3641 } 3642 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3643 cnt++; 3644 } 3645 } 3646 if (cnt) { 3647 /* Ok we have someone out there that will kill us */ 3648 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3649 #ifdef SCTP_LOG_CLOSING 3650 sctp_log_closing(inp, NULL, 3); 3651 #endif 3652 SCTP_INP_WUNLOCK(inp); 3653 SCTP_ASOC_CREATE_UNLOCK(inp); 3654 SCTP_INP_INFO_WUNLOCK(); 3655 return; 3656 } 3657 if (SCTP_INP_LOCK_CONTENDED(inp)) 3658 being_refed++; 3659 if (SCTP_INP_READ_CONTENDED(inp)) 3660 being_refed++; 3661 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3662 being_refed++; 3663 3664 if ((inp->refcount) || 3665 (being_refed) || 3666 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3667 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3668 #ifdef SCTP_LOG_CLOSING 3669 sctp_log_closing(inp, NULL, 4); 3670 #endif 3671 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3672 SCTP_INP_WUNLOCK(inp); 3673 SCTP_ASOC_CREATE_UNLOCK(inp); 3674 SCTP_INP_INFO_WUNLOCK(); 3675 return; 3676 } 3677 inp->sctp_ep.signature_change.type = 0; 3678 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3679 /* 3680 * Remove it from the list .. last thing we need a lock for. 3681 */ 3682 LIST_REMOVE(inp, sctp_list); 3683 SCTP_INP_WUNLOCK(inp); 3684 SCTP_ASOC_CREATE_UNLOCK(inp); 3685 SCTP_INP_INFO_WUNLOCK(); 3686 /* 3687 * Now we release all locks. Since this INP cannot be found anymore 3688 * except possibly by the kill timer that might be running. We call 3689 * the drain function here. It should hit the case were it sees the 3690 * ACTIVE flag cleared and exit out freeing us to proceed and 3691 * destroy everything. 3692 */ 3693 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3694 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3695 } else { 3696 /* Probably un-needed */ 3697 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3698 } 3699 3700 #ifdef SCTP_LOG_CLOSING 3701 sctp_log_closing(inp, NULL, 5); 3702 #endif 3703 3704 3705 if ((inp->sctp_asocidhash) != NULL) { 3706 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3707 inp->sctp_asocidhash = NULL; 3708 } 3709 /* sa_ignore FREED_MEMORY */ 3710 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3711 /* Its only abandoned if it had data left */ 3712 if (sq->length) 3713 SCTP_STAT_INCR(sctps_left_abandon); 3714 3715 TAILQ_REMOVE(&inp->read_queue, sq, next); 3716 sctp_free_remote_addr(sq->whoFrom); 3717 if (so) 3718 so->so_rcv.sb_cc -= sq->length; 3719 if (sq->data) { 3720 sctp_m_freem(sq->data); 3721 sq->data = NULL; 3722 } 3723 /* 3724 * no need to free the net count, since at this point all 3725 * assoc's are gone. 3726 */ 3727 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3728 SCTP_DECR_READQ_COUNT(); 3729 } 3730 /* Now the sctp_pcb things */ 3731 /* 3732 * free each asoc if it is not already closed/free. we can't use the 3733 * macro here since le_next will get freed as part of the 3734 * sctp_free_assoc() call. 3735 */ 3736 cnt = 0; 3737 if (so) { 3738 #ifdef IPSEC 3739 ipsec_delete_pcbpolicy(ip_pcb); 3740 #endif /* IPSEC */ 3741 3742 /* Unlocks not needed since the socket is gone now */ 3743 } 3744 if (ip_pcb->inp_options) { 3745 (void)sctp_m_free(ip_pcb->inp_options); 3746 ip_pcb->inp_options = 0; 3747 } 3748 #ifdef INET6 3749 if (ip_pcb->inp_vflag & INP_IPV6) { 3750 struct in6pcb *in6p; 3751 3752 in6p = (struct in6pcb *)inp; 3753 ip6_freepcbopts(in6p->in6p_outputopts); 3754 } 3755 #endif /* INET6 */ 3756 ip_pcb->inp_vflag = 0; 3757 /* free up authentication fields */ 3758 if (inp->sctp_ep.local_auth_chunks != NULL) 3759 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3760 if (inp->sctp_ep.local_hmacs != NULL) 3761 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3762 3763 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3764 LIST_REMOVE(shared_key, next); 3765 sctp_free_sharedkey(shared_key); 3766 /* sa_ignore FREED_MEMORY */ 3767 } 3768 3769 /* 3770 * if we have an address list the following will free the list of 3771 * ifaddr's that are set into this ep. Again macro limitations here, 3772 * since the LIST_FOREACH could be a bad idea. 3773 */ 3774 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3775 sctp_remove_laddr(laddr); 3776 } 3777 3778 #ifdef SCTP_TRACK_FREED_ASOCS 3779 /* TEMP CODE */ 3780 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3781 LIST_REMOVE(asoc, sctp_tcblist); 3782 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3783 SCTP_DECR_ASOC_COUNT(); 3784 } 3785 /* *** END TEMP CODE *** */ 3786 #endif 3787 /* Now lets see about freeing the EP hash table. */ 3788 if (inp->sctp_tcbhash != NULL) { 3789 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3790 inp->sctp_tcbhash = NULL; 3791 } 3792 /* Now we must put the ep memory back into the zone pool */ 3793 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3794 SCTP_INP_LOCK_DESTROY(inp); 3795 SCTP_INP_READ_DESTROY(inp); 3796 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3797 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3798 SCTP_DECR_EP_COUNT(); 3799 } 3800 3801 3802 struct sctp_nets * 3803 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3804 { 3805 struct sctp_nets *net; 3806 3807 /* locate the address */ 3808 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3809 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3810 return (net); 3811 } 3812 return (NULL); 3813 } 3814 3815 3816 int 3817 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3818 { 3819 struct sctp_ifa *sctp_ifa; 3820 3821 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3822 if (sctp_ifa) { 3823 return (1); 3824 } else { 3825 return (0); 3826 } 3827 } 3828 3829 /* 3830 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3831 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3832 * stats of stuff. 3833 */ 3834 int 3835 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3836 struct sctp_nets **netp, int set_scope, int from) 3837 { 3838 /* 3839 * The following is redundant to the same lines in the 3840 * sctp_aloc_assoc() but is needed since others call the add address 3841 * function 3842 */ 3843 struct sctp_nets *net, *netfirst; 3844 int addr_inscope; 3845 3846 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3847 from); 3848 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3849 3850 netfirst = sctp_findnet(stcb, newaddr); 3851 if (netfirst) { 3852 /* 3853 * Lie and return ok, we don't want to make the association 3854 * go away for this behavior. It will happen in the TCP 3855 * model in a connected socket. It does not reach the hash 3856 * table until after the association is built so it can't be 3857 * found. Mark as reachable, since the initial creation will 3858 * have been cleared and the NOT_IN_ASSOC flag will have 3859 * been added... and we don't want to end up removing it 3860 * back out. 3861 */ 3862 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3863 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3864 SCTP_ADDR_UNCONFIRMED); 3865 } else { 3866 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3867 } 3868 3869 return (0); 3870 } 3871 addr_inscope = 1; 3872 switch (newaddr->sa_family) { 3873 #ifdef INET 3874 case AF_INET: 3875 { 3876 struct sockaddr_in *sin; 3877 3878 sin = (struct sockaddr_in *)newaddr; 3879 if (sin->sin_addr.s_addr == 0) { 3880 /* Invalid address */ 3881 return (-1); 3882 } 3883 /* zero out the bzero area */ 3884 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3885 3886 /* assure len is set */ 3887 sin->sin_len = sizeof(struct sockaddr_in); 3888 if (set_scope) { 3889 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3890 stcb->ipv4_local_scope = 1; 3891 #else 3892 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3893 stcb->asoc.ipv4_local_scope = 1; 3894 } 3895 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3896 } else { 3897 /* Validate the address is in scope */ 3898 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3899 (stcb->asoc.ipv4_local_scope == 0)) { 3900 addr_inscope = 0; 3901 } 3902 } 3903 break; 3904 } 3905 #endif 3906 #ifdef INET6 3907 case AF_INET6: 3908 { 3909 struct sockaddr_in6 *sin6; 3910 3911 sin6 = (struct sockaddr_in6 *)newaddr; 3912 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3913 /* Invalid address */ 3914 return (-1); 3915 } 3916 /* assure len is set */ 3917 sin6->sin6_len = sizeof(struct sockaddr_in6); 3918 if (set_scope) { 3919 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3920 stcb->asoc.loopback_scope = 1; 3921 stcb->asoc.local_scope = 0; 3922 stcb->asoc.ipv4_local_scope = 1; 3923 stcb->asoc.site_scope = 1; 3924 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3925 /* 3926 * If the new destination is a 3927 * LINK_LOCAL we must have common 3928 * site scope. Don't set the local 3929 * scope since we may not share all 3930 * links, only loopback can do this. 3931 * Links on the local network would 3932 * also be on our private network 3933 * for v4 too. 3934 */ 3935 stcb->asoc.ipv4_local_scope = 1; 3936 stcb->asoc.site_scope = 1; 3937 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3938 /* 3939 * If the new destination is 3940 * SITE_LOCAL then we must have site 3941 * scope in common. 3942 */ 3943 stcb->asoc.site_scope = 1; 3944 } 3945 } else { 3946 /* Validate the address is in scope */ 3947 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3948 (stcb->asoc.loopback_scope == 0)) { 3949 addr_inscope = 0; 3950 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3951 (stcb->asoc.local_scope == 0)) { 3952 addr_inscope = 0; 3953 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3954 (stcb->asoc.site_scope == 0)) { 3955 addr_inscope = 0; 3956 } 3957 } 3958 break; 3959 } 3960 #endif 3961 default: 3962 /* not supported family type */ 3963 return (-1); 3964 } 3965 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3966 if (net == NULL) { 3967 return (-1); 3968 } 3969 SCTP_INCR_RADDR_COUNT(); 3970 bzero(net, sizeof(struct sctp_nets)); 3971 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3972 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3973 switch (newaddr->sa_family) { 3974 #ifdef INET 3975 case AF_INET: 3976 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3977 break; 3978 #endif 3979 #ifdef INET6 3980 case AF_INET6: 3981 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3982 break; 3983 #endif 3984 default: 3985 break; 3986 } 3987 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3988 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3989 stcb->asoc.loopback_scope = 1; 3990 stcb->asoc.ipv4_local_scope = 1; 3991 stcb->asoc.local_scope = 0; 3992 stcb->asoc.site_scope = 1; 3993 addr_inscope = 1; 3994 } 3995 net->failure_threshold = stcb->asoc.def_net_failure; 3996 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3997 if (addr_inscope == 0) { 3998 net->dest_state = (SCTP_ADDR_REACHABLE | 3999 SCTP_ADDR_OUT_OF_SCOPE); 4000 } else { 4001 if (from == SCTP_ADDR_IS_CONFIRMED) 4002 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 4003 net->dest_state = SCTP_ADDR_REACHABLE; 4004 else 4005 net->dest_state = SCTP_ADDR_REACHABLE | 4006 SCTP_ADDR_UNCONFIRMED; 4007 } 4008 /* 4009 * We set this to 0, the timer code knows that this means its an 4010 * initial value 4011 */ 4012 net->rto_needed = 1; 4013 net->RTO = 0; 4014 net->RTO_measured = 0; 4015 stcb->asoc.numnets++; 4016 *(&net->ref_count) = 1; 4017 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 4018 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 4019 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4020 } else { 4021 net->port = 0; 4022 } 4023 net->dscp = stcb->asoc.default_dscp; 4024 #ifdef INET6 4025 net->flowlabel = stcb->asoc.default_flowlabel; 4026 #endif 4027 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 4028 net->dest_state |= SCTP_ADDR_NOHB; 4029 } else { 4030 net->dest_state &= ~SCTP_ADDR_NOHB; 4031 } 4032 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 4033 net->dest_state |= SCTP_ADDR_NO_PMTUD; 4034 } else { 4035 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 4036 } 4037 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 4038 /* Init the timer structure */ 4039 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 4040 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 4041 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 4042 4043 /* Now generate a route for this guy */ 4044 #ifdef INET6 4045 /* KAME hack: embed scopeid */ 4046 if (newaddr->sa_family == AF_INET6) { 4047 struct sockaddr_in6 *sin6; 4048 4049 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4050 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 4051 sin6->sin6_scope_id = 0; 4052 } 4053 #endif 4054 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 4055 4056 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 4057 /* Get source address */ 4058 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 4059 stcb, 4060 (sctp_route_t *) & net->ro, 4061 net, 4062 0, 4063 stcb->asoc.vrf_id); 4064 /* Now get the interface MTU */ 4065 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 4066 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 4067 } 4068 if (net->mtu > 0) { 4069 uint32_t rmtu; 4070 4071 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 4072 if (rmtu == 0) { 4073 /* 4074 * Start things off to match mtu of 4075 * interface please. 4076 */ 4077 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 4078 net->ro.ro_rt, net->mtu); 4079 } else { 4080 /* 4081 * we take the route mtu over the interface, 4082 * since the route may be leading out the 4083 * loopback, or a different interface. 4084 */ 4085 net->mtu = rmtu; 4086 } 4087 } 4088 } 4089 if (net->mtu == 0) { 4090 switch (newaddr->sa_family) { 4091 #ifdef INET 4092 case AF_INET: 4093 net->mtu = SCTP_DEFAULT_MTU; 4094 break; 4095 #endif 4096 #ifdef INET6 4097 case AF_INET6: 4098 net->mtu = 1280; 4099 break; 4100 #endif 4101 default: 4102 break; 4103 } 4104 } 4105 if (net->port) { 4106 net->mtu -= (uint32_t) sizeof(struct udphdr); 4107 } 4108 if (from == SCTP_ALLOC_ASOC) { 4109 stcb->asoc.smallest_mtu = net->mtu; 4110 } 4111 if (stcb->asoc.smallest_mtu > net->mtu) { 4112 stcb->asoc.smallest_mtu = net->mtu; 4113 } 4114 #ifdef INET6 4115 if (newaddr->sa_family == AF_INET6) { 4116 struct sockaddr_in6 *sin6; 4117 4118 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4119 (void)sa6_recoverscope(sin6); 4120 } 4121 #endif 4122 4123 /* JRS - Use the congestion control given in the CC module */ 4124 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4125 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4126 4127 /* 4128 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4129 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4130 */ 4131 net->find_pseudo_cumack = 1; 4132 net->find_rtx_pseudo_cumack = 1; 4133 net->src_addr_selected = 0; 4134 /* Choose an initial flowid. */ 4135 net->flowid = stcb->asoc.my_vtag ^ 4136 ntohs(stcb->rport) ^ 4137 ntohs(stcb->sctp_ep->sctp_lport); 4138 #ifdef INVARIANTS 4139 net->flowidset = 1; 4140 #endif 4141 if (netp) { 4142 *netp = net; 4143 } 4144 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4145 if (net->ro.ro_rt == NULL) { 4146 /* Since we have no route put it at the back */ 4147 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4148 } else if (netfirst == NULL) { 4149 /* We are the first one in the pool. */ 4150 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4151 } else if (netfirst->ro.ro_rt == NULL) { 4152 /* 4153 * First one has NO route. Place this one ahead of the first 4154 * one. 4155 */ 4156 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4157 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4158 /* 4159 * This one has a different interface than the one at the 4160 * top of the list. Place it ahead. 4161 */ 4162 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4163 } else { 4164 /* 4165 * Ok we have the same interface as the first one. Move 4166 * forward until we find either a) one with a NULL route... 4167 * insert ahead of that b) one with a different ifp.. insert 4168 * after that. c) end of the list.. insert at the tail. 4169 */ 4170 struct sctp_nets *netlook; 4171 4172 do { 4173 netlook = TAILQ_NEXT(netfirst, sctp_next); 4174 if (netlook == NULL) { 4175 /* End of the list */ 4176 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4177 break; 4178 } else if (netlook->ro.ro_rt == NULL) { 4179 /* next one has NO route */ 4180 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4181 break; 4182 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4183 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4184 net, sctp_next); 4185 break; 4186 } 4187 /* Shift forward */ 4188 netfirst = netlook; 4189 } while (netlook != NULL); 4190 } 4191 4192 /* got to have a primary set */ 4193 if (stcb->asoc.primary_destination == 0) { 4194 stcb->asoc.primary_destination = net; 4195 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4196 (net->ro.ro_rt) && 4197 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4198 /* No route to current primary adopt new primary */ 4199 stcb->asoc.primary_destination = net; 4200 } 4201 /* Validate primary is first */ 4202 net = TAILQ_FIRST(&stcb->asoc.nets); 4203 if ((net != stcb->asoc.primary_destination) && 4204 (stcb->asoc.primary_destination)) { 4205 /* 4206 * first one on the list is NOT the primary sctp_cmpaddr() 4207 * is much more efficient if the primary is the first on the 4208 * list, make it so. 4209 */ 4210 TAILQ_REMOVE(&stcb->asoc.nets, 4211 stcb->asoc.primary_destination, sctp_next); 4212 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4213 stcb->asoc.primary_destination, sctp_next); 4214 } 4215 return (0); 4216 } 4217 4218 4219 static uint32_t 4220 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4221 { 4222 uint32_t id; 4223 struct sctpasochead *head; 4224 struct sctp_tcb *lstcb; 4225 4226 SCTP_INP_WLOCK(inp); 4227 try_again: 4228 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4229 /* TSNH */ 4230 SCTP_INP_WUNLOCK(inp); 4231 return (0); 4232 } 4233 /* 4234 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4235 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4236 */ 4237 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4238 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4239 } 4240 id = inp->sctp_associd_counter; 4241 inp->sctp_associd_counter++; 4242 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4243 if (lstcb) { 4244 goto try_again; 4245 } 4246 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4247 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4248 stcb->asoc.in_asocid_hash = 1; 4249 SCTP_INP_WUNLOCK(inp); 4250 return id; 4251 } 4252 4253 /* 4254 * allocate an association and add it to the endpoint. The caller must be 4255 * careful to add all additional addresses once they are know right away or 4256 * else the assoc will be may experience a blackout scenario. 4257 */ 4258 struct sctp_tcb * 4259 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4260 int *error, uint32_t override_tag, uint32_t vrf_id, 4261 struct thread *p 4262 ) 4263 { 4264 /* note the p argument is only valid in unbound sockets */ 4265 4266 struct sctp_tcb *stcb; 4267 struct sctp_association *asoc; 4268 struct sctpasochead *head; 4269 uint16_t rport; 4270 int err; 4271 4272 /* 4273 * Assumption made here: Caller has done a 4274 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4275 * address does not exist already. 4276 */ 4277 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4278 /* Hit max assoc, sorry no more */ 4279 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4280 *error = ENOBUFS; 4281 return (NULL); 4282 } 4283 if (firstaddr == NULL) { 4284 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4285 *error = EINVAL; 4286 return (NULL); 4287 } 4288 SCTP_INP_RLOCK(inp); 4289 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4290 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4291 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4292 /* 4293 * If its in the TCP pool, its NOT allowed to create an 4294 * association. The parent listener needs to call 4295 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4296 * off, or connected one does this.. its an error. 4297 */ 4298 SCTP_INP_RUNLOCK(inp); 4299 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4300 *error = EINVAL; 4301 return (NULL); 4302 } 4303 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4304 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4305 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4306 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4307 SCTP_INP_RUNLOCK(inp); 4308 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4309 *error = EINVAL; 4310 return (NULL); 4311 } 4312 } 4313 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4314 #ifdef SCTP_DEBUG 4315 if (firstaddr) { 4316 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4317 switch (firstaddr->sa_family) { 4318 #ifdef INET 4319 case AF_INET: 4320 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4321 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4322 break; 4323 #endif 4324 #ifdef INET6 4325 case AF_INET6: 4326 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4327 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4328 break; 4329 #endif 4330 default: 4331 break; 4332 } 4333 } else { 4334 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4335 } 4336 #endif /* SCTP_DEBUG */ 4337 switch (firstaddr->sa_family) { 4338 #ifdef INET 4339 case AF_INET: 4340 { 4341 struct sockaddr_in *sin; 4342 4343 sin = (struct sockaddr_in *)firstaddr; 4344 if ((ntohs(sin->sin_port) == 0) || 4345 (sin->sin_addr.s_addr == INADDR_ANY) || 4346 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4347 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4348 /* Invalid address */ 4349 SCTP_INP_RUNLOCK(inp); 4350 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4351 *error = EINVAL; 4352 return (NULL); 4353 } 4354 rport = sin->sin_port; 4355 break; 4356 } 4357 #endif 4358 #ifdef INET6 4359 case AF_INET6: 4360 { 4361 struct sockaddr_in6 *sin6; 4362 4363 sin6 = (struct sockaddr_in6 *)firstaddr; 4364 if ((ntohs(sin6->sin6_port) == 0) || 4365 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4366 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4367 /* Invalid address */ 4368 SCTP_INP_RUNLOCK(inp); 4369 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4370 *error = EINVAL; 4371 return (NULL); 4372 } 4373 rport = sin6->sin6_port; 4374 break; 4375 } 4376 #endif 4377 default: 4378 /* not supported family type */ 4379 SCTP_INP_RUNLOCK(inp); 4380 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4381 *error = EINVAL; 4382 return (NULL); 4383 } 4384 SCTP_INP_RUNLOCK(inp); 4385 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4386 /* 4387 * If you have not performed a bind, then we need to do the 4388 * ephemeral bind for you. 4389 */ 4390 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4391 (struct sockaddr *)NULL, 4392 (struct sctp_ifa *)NULL, 4393 p 4394 ))) { 4395 /* bind error, probably perm */ 4396 *error = err; 4397 return (NULL); 4398 } 4399 } 4400 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4401 if (stcb == NULL) { 4402 /* out of memory? */ 4403 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4404 *error = ENOMEM; 4405 return (NULL); 4406 } 4407 SCTP_INCR_ASOC_COUNT(); 4408 4409 bzero(stcb, sizeof(*stcb)); 4410 asoc = &stcb->asoc; 4411 4412 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4413 SCTP_TCB_LOCK_INIT(stcb); 4414 SCTP_TCB_SEND_LOCK_INIT(stcb); 4415 stcb->rport = rport; 4416 /* setup back pointer's */ 4417 stcb->sctp_ep = inp; 4418 stcb->sctp_socket = inp->sctp_socket; 4419 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4420 /* failed */ 4421 SCTP_TCB_LOCK_DESTROY(stcb); 4422 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4423 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4424 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4425 SCTP_DECR_ASOC_COUNT(); 4426 *error = err; 4427 return (NULL); 4428 } 4429 /* and the port */ 4430 SCTP_INP_INFO_WLOCK(); 4431 SCTP_INP_WLOCK(inp); 4432 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4433 /* inpcb freed while alloc going on */ 4434 SCTP_TCB_LOCK_DESTROY(stcb); 4435 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4436 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4437 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4438 SCTP_INP_WUNLOCK(inp); 4439 SCTP_INP_INFO_WUNLOCK(); 4440 SCTP_DECR_ASOC_COUNT(); 4441 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4442 *error = EINVAL; 4443 return (NULL); 4444 } 4445 SCTP_TCB_LOCK(stcb); 4446 4447 /* now that my_vtag is set, add it to the hash */ 4448 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4449 /* put it in the bucket in the vtag hash of assoc's for the system */ 4450 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4451 SCTP_INP_INFO_WUNLOCK(); 4452 4453 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4454 /* failure.. memory error? */ 4455 if (asoc->strmout) { 4456 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4457 asoc->strmout = NULL; 4458 } 4459 if (asoc->mapping_array) { 4460 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4461 asoc->mapping_array = NULL; 4462 } 4463 if (asoc->nr_mapping_array) { 4464 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4465 asoc->nr_mapping_array = NULL; 4466 } 4467 SCTP_DECR_ASOC_COUNT(); 4468 SCTP_TCB_LOCK_DESTROY(stcb); 4469 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4470 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4471 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4472 SCTP_INP_WUNLOCK(inp); 4473 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4474 *error = ENOBUFS; 4475 return (NULL); 4476 } 4477 /* Init all the timers */ 4478 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4479 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4480 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4481 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4482 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4483 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4484 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4485 4486 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4487 /* now file the port under the hash as well */ 4488 if (inp->sctp_tcbhash != NULL) { 4489 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4490 inp->sctp_hashmark)]; 4491 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4492 } 4493 SCTP_INP_WUNLOCK(inp); 4494 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4495 return (stcb); 4496 } 4497 4498 4499 void 4500 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4501 { 4502 struct sctp_association *asoc; 4503 4504 asoc = &stcb->asoc; 4505 asoc->numnets--; 4506 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4507 if (net == asoc->primary_destination) { 4508 /* Reset primary */ 4509 struct sctp_nets *lnet; 4510 4511 lnet = TAILQ_FIRST(&asoc->nets); 4512 /* 4513 * Mobility adaptation Ideally, if deleted destination is 4514 * the primary, it becomes a fast retransmission trigger by 4515 * the subsequent SET PRIMARY. (by micchie) 4516 */ 4517 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4518 SCTP_MOBILITY_BASE) || 4519 sctp_is_mobility_feature_on(stcb->sctp_ep, 4520 SCTP_MOBILITY_FASTHANDOFF)) { 4521 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4522 if (asoc->deleted_primary != NULL) { 4523 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4524 goto out; 4525 } 4526 asoc->deleted_primary = net; 4527 atomic_add_int(&net->ref_count, 1); 4528 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4529 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4530 sctp_mobility_feature_on(stcb->sctp_ep, 4531 SCTP_MOBILITY_PRIM_DELETED); 4532 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4533 stcb->sctp_ep, stcb, NULL); 4534 } 4535 out: 4536 /* Try to find a confirmed primary */ 4537 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4538 } 4539 if (net == asoc->last_data_chunk_from) { 4540 /* Reset primary */ 4541 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4542 } 4543 if (net == asoc->last_control_chunk_from) { 4544 /* Clear net */ 4545 asoc->last_control_chunk_from = NULL; 4546 } 4547 if (net == stcb->asoc.alternate) { 4548 sctp_free_remote_addr(stcb->asoc.alternate); 4549 stcb->asoc.alternate = NULL; 4550 } 4551 sctp_free_remote_addr(net); 4552 } 4553 4554 /* 4555 * remove a remote endpoint address from an association, it will fail if the 4556 * address does not exist. 4557 */ 4558 int 4559 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4560 { 4561 /* 4562 * Here we need to remove a remote address. This is quite simple, we 4563 * first find it in the list of address for the association 4564 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4565 * on that item. Note we do not allow it to be removed if there are 4566 * no other addresses. 4567 */ 4568 struct sctp_association *asoc; 4569 struct sctp_nets *net, *nnet; 4570 4571 asoc = &stcb->asoc; 4572 4573 /* locate the address */ 4574 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4575 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4576 continue; 4577 } 4578 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4579 remaddr)) { 4580 /* we found the guy */ 4581 if (asoc->numnets < 2) { 4582 /* Must have at LEAST two remote addresses */ 4583 return (-1); 4584 } else { 4585 sctp_remove_net(stcb, net); 4586 return (0); 4587 } 4588 } 4589 } 4590 /* not found. */ 4591 return (-2); 4592 } 4593 4594 void 4595 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4596 { 4597 struct sctpvtaghead *chain; 4598 struct sctp_tagblock *twait_block; 4599 int found = 0; 4600 int i; 4601 4602 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4603 if (!LIST_EMPTY(chain)) { 4604 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4605 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4606 if ((twait_block->vtag_block[i].v_tag == tag) && 4607 (twait_block->vtag_block[i].lport == lport) && 4608 (twait_block->vtag_block[i].rport == rport)) { 4609 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4610 twait_block->vtag_block[i].v_tag = 0; 4611 twait_block->vtag_block[i].lport = 0; 4612 twait_block->vtag_block[i].rport = 0; 4613 found = 1; 4614 break; 4615 } 4616 } 4617 if (found) 4618 break; 4619 } 4620 } 4621 } 4622 4623 int 4624 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4625 { 4626 struct sctpvtaghead *chain; 4627 struct sctp_tagblock *twait_block; 4628 int found = 0; 4629 int i; 4630 4631 SCTP_INP_INFO_WLOCK(); 4632 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4633 if (!LIST_EMPTY(chain)) { 4634 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4635 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4636 if ((twait_block->vtag_block[i].v_tag == tag) && 4637 (twait_block->vtag_block[i].lport == lport) && 4638 (twait_block->vtag_block[i].rport == rport)) { 4639 found = 1; 4640 break; 4641 } 4642 } 4643 if (found) 4644 break; 4645 } 4646 } 4647 SCTP_INP_INFO_WUNLOCK(); 4648 return (found); 4649 } 4650 4651 4652 void 4653 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4654 { 4655 struct sctpvtaghead *chain; 4656 struct sctp_tagblock *twait_block; 4657 struct timeval now; 4658 int set, i; 4659 4660 if (time == 0) { 4661 /* Its disabled */ 4662 return; 4663 } 4664 (void)SCTP_GETTIME_TIMEVAL(&now); 4665 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4666 set = 0; 4667 if (!LIST_EMPTY(chain)) { 4668 /* Block(s) present, lets find space, and expire on the fly */ 4669 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4670 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4671 if ((twait_block->vtag_block[i].v_tag == 0) && 4672 !set) { 4673 twait_block->vtag_block[i].tv_sec_at_expire = 4674 now.tv_sec + time; 4675 twait_block->vtag_block[i].v_tag = tag; 4676 twait_block->vtag_block[i].lport = lport; 4677 twait_block->vtag_block[i].rport = rport; 4678 set = 1; 4679 } else if ((twait_block->vtag_block[i].v_tag) && 4680 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4681 /* Audit expires this guy */ 4682 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4683 twait_block->vtag_block[i].v_tag = 0; 4684 twait_block->vtag_block[i].lport = 0; 4685 twait_block->vtag_block[i].rport = 0; 4686 if (set == 0) { 4687 /* Reuse it for my new tag */ 4688 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4689 twait_block->vtag_block[i].v_tag = tag; 4690 twait_block->vtag_block[i].lport = lport; 4691 twait_block->vtag_block[i].rport = rport; 4692 set = 1; 4693 } 4694 } 4695 } 4696 if (set) { 4697 /* 4698 * We only do up to the block where we can 4699 * place our tag for audits 4700 */ 4701 break; 4702 } 4703 } 4704 } 4705 /* Need to add a new block to chain */ 4706 if (!set) { 4707 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4708 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4709 if (twait_block == NULL) { 4710 #ifdef INVARIANTS 4711 panic("Can not alloc tagblock"); 4712 #endif 4713 return; 4714 } 4715 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4716 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4717 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4718 twait_block->vtag_block[0].v_tag = tag; 4719 twait_block->vtag_block[0].lport = lport; 4720 twait_block->vtag_block[0].rport = rport; 4721 } 4722 } 4723 4724 4725 4726 /*- 4727 * Free the association after un-hashing the remote port. This 4728 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4729 * expect that the input to this function IS a locked TCB. 4730 * It will return 0, if it did NOT destroy the association (instead 4731 * it unlocks it. It will return NON-zero if it either destroyed the 4732 * association OR the association is already destroyed. 4733 */ 4734 int 4735 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4736 { 4737 int i; 4738 struct sctp_association *asoc; 4739 struct sctp_nets *net, *nnet; 4740 struct sctp_laddr *laddr, *naddr; 4741 struct sctp_tmit_chunk *chk, *nchk; 4742 struct sctp_asconf_addr *aparam, *naparam; 4743 struct sctp_asconf_ack *aack, *naack; 4744 struct sctp_stream_reset_list *strrst, *nstrrst; 4745 struct sctp_queued_to_read *sq, *nsq; 4746 struct sctp_stream_queue_pending *sp, *nsp; 4747 sctp_sharedkey_t *shared_key, *nshared_key; 4748 struct socket *so; 4749 4750 /* first, lets purge the entry from the hash table. */ 4751 4752 #ifdef SCTP_LOG_CLOSING 4753 sctp_log_closing(inp, stcb, 6); 4754 #endif 4755 if (stcb->asoc.state == 0) { 4756 #ifdef SCTP_LOG_CLOSING 4757 sctp_log_closing(inp, NULL, 7); 4758 #endif 4759 /* there is no asoc, really TSNH :-0 */ 4760 return (1); 4761 } 4762 if (stcb->asoc.alternate) { 4763 sctp_free_remote_addr(stcb->asoc.alternate); 4764 stcb->asoc.alternate = NULL; 4765 } 4766 /* TEMP CODE */ 4767 if (stcb->freed_from_where == 0) { 4768 /* Only record the first place free happened from */ 4769 stcb->freed_from_where = from_location; 4770 } 4771 /* TEMP CODE */ 4772 4773 asoc = &stcb->asoc; 4774 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4775 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4776 /* nothing around */ 4777 so = NULL; 4778 else 4779 so = inp->sctp_socket; 4780 4781 /* 4782 * We used timer based freeing if a reader or writer is in the way. 4783 * So we first check if we are actually being called from a timer, 4784 * if so we abort early if a reader or writer is still in the way. 4785 */ 4786 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4787 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4788 /* 4789 * is it the timer driving us? if so are the reader/writers 4790 * gone? 4791 */ 4792 if (stcb->asoc.refcnt) { 4793 /* nope, reader or writer in the way */ 4794 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4795 /* no asoc destroyed */ 4796 SCTP_TCB_UNLOCK(stcb); 4797 #ifdef SCTP_LOG_CLOSING 4798 sctp_log_closing(inp, stcb, 8); 4799 #endif 4800 return (0); 4801 } 4802 } 4803 /* now clean up any other timers */ 4804 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4805 asoc->dack_timer.self = NULL; 4806 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4807 /*- 4808 * For stream reset we don't blast this unless 4809 * it is a str-reset timer, it might be the 4810 * free-asoc timer which we DON'T want to 4811 * disturb. 4812 */ 4813 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4814 asoc->strreset_timer.self = NULL; 4815 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4816 asoc->asconf_timer.self = NULL; 4817 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4818 asoc->autoclose_timer.self = NULL; 4819 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4820 asoc->shut_guard_timer.self = NULL; 4821 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4822 asoc->delayed_event_timer.self = NULL; 4823 /* Mobility adaptation */ 4824 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4825 asoc->delete_prim_timer.self = NULL; 4826 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4827 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4828 net->rxt_timer.self = NULL; 4829 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4830 net->pmtu_timer.self = NULL; 4831 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4832 net->hb_timer.self = NULL; 4833 } 4834 /* Now the read queue needs to be cleaned up (only once) */ 4835 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4836 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4837 SCTP_INP_READ_LOCK(inp); 4838 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4839 if (sq->stcb == stcb) { 4840 sq->do_not_ref_stcb = 1; 4841 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4842 /* 4843 * If there is no end, there never will be 4844 * now. 4845 */ 4846 if (sq->end_added == 0) { 4847 /* Held for PD-API clear that. */ 4848 sq->pdapi_aborted = 1; 4849 sq->held_length = 0; 4850 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4851 /* 4852 * Need to add a PD-API 4853 * aborted indication. 4854 * Setting the control_pdapi 4855 * assures that it will be 4856 * added right after this 4857 * msg. 4858 */ 4859 uint32_t strseq; 4860 4861 stcb->asoc.control_pdapi = sq; 4862 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4863 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4864 stcb, 4865 SCTP_PARTIAL_DELIVERY_ABORTED, 4866 (void *)&strseq, 4867 SCTP_SO_LOCKED); 4868 stcb->asoc.control_pdapi = NULL; 4869 } 4870 } 4871 /* Add an end to wake them */ 4872 sq->end_added = 1; 4873 } 4874 } 4875 SCTP_INP_READ_UNLOCK(inp); 4876 if (stcb->block_entry) { 4877 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4878 stcb->block_entry->error = ECONNRESET; 4879 stcb->block_entry = NULL; 4880 } 4881 } 4882 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4883 /* 4884 * Someone holds a reference OR the socket is unaccepted 4885 * yet. 4886 */ 4887 if ((stcb->asoc.refcnt) || 4888 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4889 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4890 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4891 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4892 } 4893 SCTP_TCB_UNLOCK(stcb); 4894 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4895 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4896 /* nothing around */ 4897 so = NULL; 4898 if (so) { 4899 /* Wake any reader/writers */ 4900 sctp_sorwakeup(inp, so); 4901 sctp_sowwakeup(inp, so); 4902 } 4903 #ifdef SCTP_LOG_CLOSING 4904 sctp_log_closing(inp, stcb, 9); 4905 #endif 4906 /* no asoc destroyed */ 4907 return (0); 4908 } 4909 #ifdef SCTP_LOG_CLOSING 4910 sctp_log_closing(inp, stcb, 10); 4911 #endif 4912 /* 4913 * When I reach here, no others want to kill the assoc yet.. and I 4914 * own the lock. Now its possible an abort comes in when I do the 4915 * lock exchange below to grab all the locks to do the final take 4916 * out. to prevent this we increment the count, which will start a 4917 * timer and blow out above thus assuring us that we hold exclusive 4918 * killing of the asoc. Note that after getting back the TCB lock we 4919 * will go ahead and increment the counter back up and stop any 4920 * timer a passing stranger may have started :-S 4921 */ 4922 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4923 atomic_add_int(&stcb->asoc.refcnt, 1); 4924 4925 SCTP_TCB_UNLOCK(stcb); 4926 SCTP_INP_INFO_WLOCK(); 4927 SCTP_INP_WLOCK(inp); 4928 SCTP_TCB_LOCK(stcb); 4929 } 4930 /* Double check the GONE flag */ 4931 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4932 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4933 /* nothing around */ 4934 so = NULL; 4935 4936 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4937 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4938 /* 4939 * For TCP type we need special handling when we are 4940 * connected. We also include the peel'ed off ones to. 4941 */ 4942 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4943 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4944 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4945 if (so) { 4946 SOCK_LOCK(so); 4947 if (so->so_rcv.sb_cc == 0) { 4948 so->so_state &= ~(SS_ISCONNECTING | 4949 SS_ISDISCONNECTING | 4950 SS_ISCONFIRMING | 4951 SS_ISCONNECTED); 4952 } 4953 socantrcvmore_locked(so); 4954 sctp_sowwakeup(inp, so); 4955 sctp_sorwakeup(inp, so); 4956 SCTP_SOWAKEUP(so); 4957 } 4958 } 4959 } 4960 /* 4961 * Make it invalid too, that way if its about to run it will abort 4962 * and return. 4963 */ 4964 /* re-increment the lock */ 4965 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4966 atomic_add_int(&stcb->asoc.refcnt, -1); 4967 } 4968 if (stcb->asoc.refcnt) { 4969 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4970 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4971 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4972 SCTP_INP_INFO_WUNLOCK(); 4973 SCTP_INP_WUNLOCK(inp); 4974 } 4975 SCTP_TCB_UNLOCK(stcb); 4976 return (0); 4977 } 4978 asoc->state = 0; 4979 if (inp->sctp_tcbhash) { 4980 LIST_REMOVE(stcb, sctp_tcbhash); 4981 } 4982 if (stcb->asoc.in_asocid_hash) { 4983 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4984 } 4985 /* Now lets remove it from the list of ALL associations in the EP */ 4986 LIST_REMOVE(stcb, sctp_tcblist); 4987 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4988 SCTP_INP_INCR_REF(inp); 4989 SCTP_INP_WUNLOCK(inp); 4990 } 4991 /* pull from vtag hash */ 4992 LIST_REMOVE(stcb, sctp_asocs); 4993 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4994 inp->sctp_lport, stcb->rport); 4995 4996 /* 4997 * Now restop the timers to be sure this is paranoia at is finest! 4998 */ 4999 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 5000 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 5001 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 5002 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 5003 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 5004 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 5005 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 5006 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 5007 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 5008 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 5009 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 5010 } 5011 5012 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 5013 /* 5014 * The chunk lists and such SHOULD be empty but we check them just 5015 * in case. 5016 */ 5017 /* anything on the wheel needs to be removed */ 5018 for (i = 0; i < asoc->streamoutcnt; i++) { 5019 struct sctp_stream_out *outs; 5020 5021 outs = &asoc->strmout[i]; 5022 /* now clean up any chunks here */ 5023 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 5024 TAILQ_REMOVE(&outs->outqueue, sp, next); 5025 if (sp->data) { 5026 if (so) { 5027 /* Still an open socket - report */ 5028 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 5029 SCTP_NOTIFY_DATAGRAM_UNSENT, 5030 (void *)sp, SCTP_SO_LOCKED); 5031 } 5032 if (sp->data) { 5033 sctp_m_freem(sp->data); 5034 sp->data = NULL; 5035 sp->tail_mbuf = NULL; 5036 } 5037 } 5038 if (sp->net) { 5039 sctp_free_remote_addr(sp->net); 5040 sp->net = NULL; 5041 } 5042 sctp_free_spbufspace(stcb, asoc, sp); 5043 if (sp->holds_key_ref) 5044 sctp_auth_key_release(stcb, sp->auth_keyid, SCTP_SO_LOCKED); 5045 /* Free the zone stuff */ 5046 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 5047 SCTP_DECR_STRMOQ_COUNT(); 5048 /* sa_ignore FREED_MEMORY */ 5049 } 5050 } 5051 /* sa_ignore FREED_MEMORY */ 5052 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 5053 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 5054 SCTP_FREE(strrst, SCTP_M_STRESET); 5055 } 5056 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 5057 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 5058 if (sq->data) { 5059 sctp_m_freem(sq->data); 5060 sq->data = NULL; 5061 } 5062 sctp_free_remote_addr(sq->whoFrom); 5063 sq->whoFrom = NULL; 5064 sq->stcb = NULL; 5065 /* Free the ctl entry */ 5066 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 5067 SCTP_DECR_READQ_COUNT(); 5068 /* sa_ignore FREED_MEMORY */ 5069 } 5070 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 5071 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5072 if (chk->data) { 5073 sctp_m_freem(chk->data); 5074 chk->data = NULL; 5075 } 5076 if (chk->holds_key_ref) 5077 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5078 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5079 SCTP_DECR_CHK_COUNT(); 5080 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5081 asoc->free_chunk_cnt--; 5082 /* sa_ignore FREED_MEMORY */ 5083 } 5084 /* pending send queue SHOULD be empty */ 5085 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5086 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5087 if (chk->data) { 5088 if (so) { 5089 /* Still a socket? */ 5090 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 5091 SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED); 5092 } 5093 if (chk->data) { 5094 sctp_m_freem(chk->data); 5095 chk->data = NULL; 5096 } 5097 } 5098 if (chk->holds_key_ref) 5099 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5100 if (chk->whoTo) { 5101 sctp_free_remote_addr(chk->whoTo); 5102 chk->whoTo = NULL; 5103 } 5104 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5105 SCTP_DECR_CHK_COUNT(); 5106 /* sa_ignore FREED_MEMORY */ 5107 } 5108 /* sent queue SHOULD be empty */ 5109 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5110 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5111 if (chk->data) { 5112 if (so) { 5113 /* Still a socket? */ 5114 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 5115 SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED); 5116 } 5117 if (chk->data) { 5118 sctp_m_freem(chk->data); 5119 chk->data = NULL; 5120 } 5121 } 5122 if (chk->holds_key_ref) 5123 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5124 sctp_free_remote_addr(chk->whoTo); 5125 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5126 SCTP_DECR_CHK_COUNT(); 5127 /* sa_ignore FREED_MEMORY */ 5128 } 5129 /* control queue MAY not be empty */ 5130 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5131 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5132 if (chk->data) { 5133 sctp_m_freem(chk->data); 5134 chk->data = NULL; 5135 } 5136 if (chk->holds_key_ref) 5137 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5138 sctp_free_remote_addr(chk->whoTo); 5139 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5140 SCTP_DECR_CHK_COUNT(); 5141 /* sa_ignore FREED_MEMORY */ 5142 } 5143 /* ASCONF queue MAY not be empty */ 5144 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5145 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5146 if (chk->data) { 5147 sctp_m_freem(chk->data); 5148 chk->data = NULL; 5149 } 5150 if (chk->holds_key_ref) 5151 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5152 sctp_free_remote_addr(chk->whoTo); 5153 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5154 SCTP_DECR_CHK_COUNT(); 5155 /* sa_ignore FREED_MEMORY */ 5156 } 5157 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5158 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5159 if (chk->data) { 5160 sctp_m_freem(chk->data); 5161 chk->data = NULL; 5162 } 5163 if (chk->holds_key_ref) 5164 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5165 sctp_free_remote_addr(chk->whoTo); 5166 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5167 SCTP_DECR_CHK_COUNT(); 5168 /* sa_ignore FREED_MEMORY */ 5169 } 5170 5171 if (asoc->mapping_array) { 5172 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5173 asoc->mapping_array = NULL; 5174 } 5175 if (asoc->nr_mapping_array) { 5176 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5177 asoc->nr_mapping_array = NULL; 5178 } 5179 /* the stream outs */ 5180 if (asoc->strmout) { 5181 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5182 asoc->strmout = NULL; 5183 } 5184 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5185 if (asoc->strmin) { 5186 struct sctp_queued_to_read *ctl, *nctl; 5187 5188 for (i = 0; i < asoc->streamincnt; i++) { 5189 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5190 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5191 sctp_free_remote_addr(ctl->whoFrom); 5192 if (ctl->data) { 5193 sctp_m_freem(ctl->data); 5194 ctl->data = NULL; 5195 } 5196 /* 5197 * We don't free the address here since all 5198 * the net's were freed above. 5199 */ 5200 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5201 SCTP_DECR_READQ_COUNT(); 5202 } 5203 } 5204 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5205 asoc->strmin = NULL; 5206 } 5207 asoc->streamincnt = 0; 5208 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5209 #ifdef INVARIANTS 5210 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5211 panic("no net's left alloc'ed, or list points to itself"); 5212 } 5213 #endif 5214 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5215 sctp_free_remote_addr(net); 5216 } 5217 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5218 /* sa_ignore FREED_MEMORY */ 5219 sctp_remove_laddr(laddr); 5220 } 5221 5222 /* pending asconf (address) parameters */ 5223 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5224 /* sa_ignore FREED_MEMORY */ 5225 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5226 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5227 } 5228 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5229 /* sa_ignore FREED_MEMORY */ 5230 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5231 if (aack->data != NULL) { 5232 sctp_m_freem(aack->data); 5233 } 5234 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5235 } 5236 /* clean up auth stuff */ 5237 if (asoc->local_hmacs) 5238 sctp_free_hmaclist(asoc->local_hmacs); 5239 if (asoc->peer_hmacs) 5240 sctp_free_hmaclist(asoc->peer_hmacs); 5241 5242 if (asoc->local_auth_chunks) 5243 sctp_free_chunklist(asoc->local_auth_chunks); 5244 if (asoc->peer_auth_chunks) 5245 sctp_free_chunklist(asoc->peer_auth_chunks); 5246 5247 sctp_free_authinfo(&asoc->authinfo); 5248 5249 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5250 LIST_REMOVE(shared_key, next); 5251 sctp_free_sharedkey(shared_key); 5252 /* sa_ignore FREED_MEMORY */ 5253 } 5254 5255 /* Insert new items here :> */ 5256 5257 /* Get rid of LOCK */ 5258 SCTP_TCB_LOCK_DESTROY(stcb); 5259 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5260 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5261 SCTP_INP_INFO_WUNLOCK(); 5262 SCTP_INP_RLOCK(inp); 5263 } 5264 #ifdef SCTP_TRACK_FREED_ASOCS 5265 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5266 /* now clean up the tasoc itself */ 5267 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5268 SCTP_DECR_ASOC_COUNT(); 5269 } else { 5270 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5271 } 5272 #else 5273 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5274 SCTP_DECR_ASOC_COUNT(); 5275 #endif 5276 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5277 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5278 /* 5279 * If its NOT the inp_free calling us AND sctp_close 5280 * as been called, we call back... 5281 */ 5282 SCTP_INP_RUNLOCK(inp); 5283 /* 5284 * This will start the kill timer (if we are the 5285 * last one) since we hold an increment yet. But 5286 * this is the only safe way to do this since 5287 * otherwise if the socket closes at the same time 5288 * we are here we might collide in the cleanup. 5289 */ 5290 sctp_inpcb_free(inp, 5291 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5292 SCTP_CALLED_DIRECTLY_NOCMPSET); 5293 SCTP_INP_DECR_REF(inp); 5294 goto out_of; 5295 } else { 5296 /* The socket is still open. */ 5297 SCTP_INP_DECR_REF(inp); 5298 } 5299 } 5300 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5301 SCTP_INP_RUNLOCK(inp); 5302 } 5303 out_of: 5304 /* destroyed the asoc */ 5305 #ifdef SCTP_LOG_CLOSING 5306 sctp_log_closing(inp, NULL, 11); 5307 #endif 5308 return (1); 5309 } 5310 5311 5312 5313 /* 5314 * determine if a destination is "reachable" based upon the addresses bound 5315 * to the current endpoint (e.g. only v4 or v6 currently bound) 5316 */ 5317 /* 5318 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5319 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5320 * types bound as its endpoint 5321 */ 5322 int 5323 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5324 { 5325 struct sctp_inpcb *inp; 5326 int answer; 5327 5328 /* 5329 * No locks here, the TCB, in all cases is already locked and an 5330 * assoc is up. There is either a INP lock by the caller applied (in 5331 * asconf case when deleting an address) or NOT in the HB case, 5332 * however if HB then the INP increment is up and the INP will not 5333 * be removed (on top of the fact that we have a TCB lock). So we 5334 * only want to read the sctp_flags, which is either bound-all or 5335 * not.. no protection needed since once an assoc is up you can't be 5336 * changing your binding. 5337 */ 5338 inp = stcb->sctp_ep; 5339 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5340 /* if bound all, destination is not restricted */ 5341 /* 5342 * RRS: Question during lock work: Is this correct? If you 5343 * are bound-all you still might need to obey the V4--V6 5344 * flags??? IMO this bound-all stuff needs to be removed! 5345 */ 5346 return (1); 5347 } 5348 /* NOTE: all "scope" checks are done when local addresses are added */ 5349 switch (destaddr->sa_family) { 5350 case AF_INET6: 5351 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5352 break; 5353 case AF_INET: 5354 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5355 break; 5356 default: 5357 /* invalid family, so it's unreachable */ 5358 answer = 0; 5359 break; 5360 } 5361 return (answer); 5362 } 5363 5364 /* 5365 * update the inp_vflags on an endpoint 5366 */ 5367 static void 5368 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5369 { 5370 struct sctp_laddr *laddr; 5371 5372 /* first clear the flag */ 5373 inp->ip_inp.inp.inp_vflag = 0; 5374 /* set the flag based on addresses on the ep list */ 5375 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5376 if (laddr->ifa == NULL) { 5377 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5378 __FUNCTION__); 5379 continue; 5380 } 5381 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5382 continue; 5383 } 5384 switch (laddr->ifa->address.sa.sa_family) { 5385 #ifdef INET6 5386 case AF_INET6: 5387 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5388 break; 5389 #endif 5390 #ifdef INET 5391 case AF_INET: 5392 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5393 break; 5394 #endif 5395 default: 5396 break; 5397 } 5398 } 5399 } 5400 5401 /* 5402 * Add the address to the endpoint local address list There is nothing to be 5403 * done if we are bound to all addresses 5404 */ 5405 void 5406 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5407 { 5408 struct sctp_laddr *laddr; 5409 int fnd, error = 0; 5410 5411 fnd = 0; 5412 5413 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5414 /* You are already bound to all. You have it already */ 5415 return; 5416 } 5417 #ifdef INET6 5418 if (ifa->address.sa.sa_family == AF_INET6) { 5419 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5420 /* Can't bind a non-useable addr. */ 5421 return; 5422 } 5423 } 5424 #endif 5425 /* first, is it already present? */ 5426 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5427 if (laddr->ifa == ifa) { 5428 fnd = 1; 5429 break; 5430 } 5431 } 5432 5433 if (fnd == 0) { 5434 /* Not in the ep list */ 5435 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5436 if (error != 0) 5437 return; 5438 inp->laddr_count++; 5439 /* update inp_vflag flags */ 5440 switch (ifa->address.sa.sa_family) { 5441 #ifdef INET6 5442 case AF_INET6: 5443 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5444 break; 5445 #endif 5446 #ifdef INET6 5447 case AF_INET: 5448 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5449 break; 5450 #endif 5451 default: 5452 break; 5453 } 5454 } 5455 return; 5456 } 5457 5458 5459 /* 5460 * select a new (hopefully reachable) destination net (should only be used 5461 * when we deleted an ep addr that is the only usable source address to reach 5462 * the destination net) 5463 */ 5464 static void 5465 sctp_select_primary_destination(struct sctp_tcb *stcb) 5466 { 5467 struct sctp_nets *net; 5468 5469 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5470 /* for now, we'll just pick the first reachable one we find */ 5471 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5472 continue; 5473 if (sctp_destination_is_reachable(stcb, 5474 (struct sockaddr *)&net->ro._l_addr)) { 5475 /* found a reachable destination */ 5476 stcb->asoc.primary_destination = net; 5477 } 5478 } 5479 /* I can't there from here! ...we're gonna die shortly... */ 5480 } 5481 5482 5483 /* 5484 * Delete the address from the endpoint local address list There is nothing 5485 * to be done if we are bound to all addresses 5486 */ 5487 void 5488 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5489 { 5490 struct sctp_laddr *laddr; 5491 int fnd; 5492 5493 fnd = 0; 5494 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5495 /* You are already bound to all. You have it already */ 5496 return; 5497 } 5498 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5499 if (laddr->ifa == ifa) { 5500 fnd = 1; 5501 break; 5502 } 5503 } 5504 if (fnd && (inp->laddr_count < 2)) { 5505 /* can't delete unless there are at LEAST 2 addresses */ 5506 return; 5507 } 5508 if (fnd) { 5509 /* 5510 * clean up any use of this address go through our 5511 * associations and clear any last_used_address that match 5512 * this one for each assoc, see if a new primary_destination 5513 * is needed 5514 */ 5515 struct sctp_tcb *stcb; 5516 5517 /* clean up "next_addr_touse" */ 5518 if (inp->next_addr_touse == laddr) 5519 /* delete this address */ 5520 inp->next_addr_touse = NULL; 5521 5522 /* clean up "last_used_address" */ 5523 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5524 struct sctp_nets *net; 5525 5526 SCTP_TCB_LOCK(stcb); 5527 if (stcb->asoc.last_used_address == laddr) 5528 /* delete this address */ 5529 stcb->asoc.last_used_address = NULL; 5530 /* 5531 * Now spin through all the nets and purge any ref 5532 * to laddr 5533 */ 5534 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5535 if (net->ro._s_addr && 5536 (net->ro._s_addr->ifa == laddr->ifa)) { 5537 /* Yep, purge src address selected */ 5538 sctp_rtentry_t *rt; 5539 5540 /* delete this address if cached */ 5541 rt = net->ro.ro_rt; 5542 if (rt != NULL) { 5543 RTFREE(rt); 5544 net->ro.ro_rt = NULL; 5545 } 5546 sctp_free_ifa(net->ro._s_addr); 5547 net->ro._s_addr = NULL; 5548 net->src_addr_selected = 0; 5549 } 5550 } 5551 SCTP_TCB_UNLOCK(stcb); 5552 } /* for each tcb */ 5553 /* remove it from the ep list */ 5554 sctp_remove_laddr(laddr); 5555 inp->laddr_count--; 5556 /* update inp_vflag flags */ 5557 sctp_update_ep_vflag(inp); 5558 } 5559 return; 5560 } 5561 5562 /* 5563 * Add the address to the TCB local address restricted list. 5564 * This is a "pending" address list (eg. addresses waiting for an 5565 * ASCONF-ACK response) and cannot be used as a valid source address. 5566 */ 5567 void 5568 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5569 { 5570 struct sctp_inpcb *inp; 5571 struct sctp_laddr *laddr; 5572 struct sctpladdr *list; 5573 5574 /* 5575 * Assumes TCB is locked.. and possibly the INP. May need to 5576 * confirm/fix that if we need it and is not the case. 5577 */ 5578 list = &stcb->asoc.sctp_restricted_addrs; 5579 5580 inp = stcb->sctp_ep; 5581 #ifdef INET6 5582 if (ifa->address.sa.sa_family == AF_INET6) { 5583 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5584 /* Can't bind a non-existent addr. */ 5585 return; 5586 } 5587 } 5588 #endif 5589 /* does the address already exist? */ 5590 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5591 if (laddr->ifa == ifa) { 5592 return; 5593 } 5594 } 5595 5596 /* add to the list */ 5597 (void)sctp_insert_laddr(list, ifa, 0); 5598 return; 5599 } 5600 5601 /* 5602 * insert an laddr entry with the given ifa for the desired list 5603 */ 5604 int 5605 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5606 { 5607 struct sctp_laddr *laddr; 5608 5609 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5610 if (laddr == NULL) { 5611 /* out of memory? */ 5612 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5613 return (EINVAL); 5614 } 5615 SCTP_INCR_LADDR_COUNT(); 5616 bzero(laddr, sizeof(*laddr)); 5617 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5618 laddr->ifa = ifa; 5619 laddr->action = act; 5620 atomic_add_int(&ifa->refcount, 1); 5621 /* insert it */ 5622 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5623 5624 return (0); 5625 } 5626 5627 /* 5628 * Remove an laddr entry from the local address list (on an assoc) 5629 */ 5630 void 5631 sctp_remove_laddr(struct sctp_laddr *laddr) 5632 { 5633 5634 /* remove from the list */ 5635 LIST_REMOVE(laddr, sctp_nxt_addr); 5636 sctp_free_ifa(laddr->ifa); 5637 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5638 SCTP_DECR_LADDR_COUNT(); 5639 } 5640 5641 /* 5642 * Remove a local address from the TCB local address restricted list 5643 */ 5644 void 5645 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5646 { 5647 struct sctp_inpcb *inp; 5648 struct sctp_laddr *laddr; 5649 5650 /* 5651 * This is called by asconf work. It is assumed that a) The TCB is 5652 * locked and b) The INP is locked. This is true in as much as I can 5653 * trace through the entry asconf code where I did these locks. 5654 * Again, the ASCONF code is a bit different in that it does lock 5655 * the INP during its work often times. This must be since we don't 5656 * want other proc's looking up things while what they are looking 5657 * up is changing :-D 5658 */ 5659 5660 inp = stcb->sctp_ep; 5661 /* if subset bound and don't allow ASCONF's, can't delete last */ 5662 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5663 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5664 if (stcb->sctp_ep->laddr_count < 2) { 5665 /* can't delete last address */ 5666 return; 5667 } 5668 } 5669 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5670 /* remove the address if it exists */ 5671 if (laddr->ifa == NULL) 5672 continue; 5673 if (laddr->ifa == ifa) { 5674 sctp_remove_laddr(laddr); 5675 return; 5676 } 5677 } 5678 5679 /* address not found! */ 5680 return; 5681 } 5682 5683 /* 5684 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5685 */ 5686 /* sysctl */ 5687 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5688 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5689 5690 5691 5692 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5693 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5694 int *sctp_cpuarry = NULL; 5695 void 5696 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5697 { 5698 /* Queue a packet to a processor for the specified core */ 5699 struct sctp_mcore_queue *qent; 5700 struct sctp_mcore_ctrl *wkq; 5701 int need_wake = 0; 5702 5703 if (sctp_mcore_workers == NULL) { 5704 /* Something went way bad during setup */ 5705 sctp_input_with_port(m, off, 0); 5706 return; 5707 } 5708 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5709 (sizeof(struct sctp_mcore_queue)), 5710 SCTP_M_MCORE); 5711 if (qent == NULL) { 5712 /* This is trouble */ 5713 sctp_input_with_port(m, off, 0); 5714 return; 5715 } 5716 qent->vn = curvnet; 5717 qent->m = m; 5718 qent->off = off; 5719 qent->v6 = 0; 5720 wkq = &sctp_mcore_workers[cpu_to_use]; 5721 SCTP_MCORE_QLOCK(wkq); 5722 5723 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5724 if (wkq->running == 0) { 5725 need_wake = 1; 5726 } 5727 SCTP_MCORE_QUNLOCK(wkq); 5728 if (need_wake) { 5729 wakeup(&wkq->running); 5730 } 5731 } 5732 5733 static void 5734 sctp_mcore_thread(void *arg) 5735 { 5736 5737 struct sctp_mcore_ctrl *wkq; 5738 struct sctp_mcore_queue *qent; 5739 5740 wkq = (struct sctp_mcore_ctrl *)arg; 5741 struct mbuf *m; 5742 int off, v6; 5743 5744 /* Wait for first tickle */ 5745 SCTP_MCORE_LOCK(wkq); 5746 wkq->running = 0; 5747 msleep(&wkq->running, 5748 &wkq->core_mtx, 5749 0, "wait for pkt", 0); 5750 SCTP_MCORE_UNLOCK(wkq); 5751 5752 /* Bind to our cpu */ 5753 thread_lock(curthread); 5754 sched_bind(curthread, wkq->cpuid); 5755 thread_unlock(curthread); 5756 5757 /* Now lets start working */ 5758 SCTP_MCORE_LOCK(wkq); 5759 /* Now grab lock and go */ 5760 while (1) { 5761 SCTP_MCORE_QLOCK(wkq); 5762 skip_sleep: 5763 wkq->running = 1; 5764 qent = TAILQ_FIRST(&wkq->que); 5765 if (qent) { 5766 TAILQ_REMOVE(&wkq->que, qent, next); 5767 SCTP_MCORE_QUNLOCK(wkq); 5768 CURVNET_SET(qent->vn); 5769 m = qent->m; 5770 off = qent->off; 5771 v6 = qent->v6; 5772 SCTP_FREE(qent, SCTP_M_MCORE); 5773 if (v6 == 0) { 5774 sctp_input_with_port(m, off, 0); 5775 } else { 5776 printf("V6 not yet supported\n"); 5777 sctp_m_freem(m); 5778 } 5779 CURVNET_RESTORE(); 5780 SCTP_MCORE_QLOCK(wkq); 5781 } 5782 wkq->running = 0; 5783 if (!TAILQ_EMPTY(&wkq->que)) { 5784 goto skip_sleep; 5785 } 5786 SCTP_MCORE_QUNLOCK(wkq); 5787 msleep(&wkq->running, 5788 &wkq->core_mtx, 5789 0, "wait for pkt", 0); 5790 }; 5791 } 5792 5793 static void 5794 sctp_startup_mcore_threads(void) 5795 { 5796 int i, cpu; 5797 5798 if (mp_ncpus == 1) 5799 return; 5800 5801 if (sctp_mcore_workers != NULL) { 5802 /* 5803 * Already been here in some previous vnet? 5804 */ 5805 return; 5806 } 5807 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5808 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5809 SCTP_M_MCORE); 5810 if (sctp_mcore_workers == NULL) { 5811 /* TSNH I hope */ 5812 return; 5813 } 5814 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5815 sizeof(struct sctp_mcore_ctrl))); 5816 /* Init the structures */ 5817 for (i = 0; i <= mp_maxid; i++) { 5818 TAILQ_INIT(&sctp_mcore_workers[i].que); 5819 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5820 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5821 sctp_mcore_workers[i].cpuid = i; 5822 } 5823 if (sctp_cpuarry == NULL) { 5824 SCTP_MALLOC(sctp_cpuarry, int *, 5825 (mp_ncpus * sizeof(int)), 5826 SCTP_M_MCORE); 5827 i = 0; 5828 CPU_FOREACH(cpu) { 5829 sctp_cpuarry[i] = cpu; 5830 i++; 5831 } 5832 } 5833 /* Now start them all */ 5834 CPU_FOREACH(cpu) { 5835 (void)kproc_create(sctp_mcore_thread, 5836 (void *)&sctp_mcore_workers[cpu], 5837 &sctp_mcore_workers[cpu].thread_proc, 5838 RFPROC, 5839 SCTP_KTHREAD_PAGES, 5840 SCTP_MCORE_NAME); 5841 5842 } 5843 } 5844 5845 #endif 5846 5847 void 5848 sctp_pcb_init() 5849 { 5850 /* 5851 * SCTP initialization for the PCB structures should be called by 5852 * the sctp_init() funciton. 5853 */ 5854 int i; 5855 struct timeval tv; 5856 5857 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5858 /* error I was called twice */ 5859 return; 5860 } 5861 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5862 5863 #if defined(SCTP_LOCAL_TRACE_BUF) 5864 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5865 #endif 5866 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5867 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5868 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5869 SCTP_M_MCORE); 5870 #endif 5871 (void)SCTP_GETTIME_TIMEVAL(&tv); 5872 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5873 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5874 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5875 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5876 #else 5877 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5878 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5879 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5880 #endif 5881 /* init the empty list of (All) Endpoints */ 5882 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5883 5884 5885 /* init the hash table of endpoints */ 5886 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5887 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5888 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5889 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5890 &SCTP_BASE_INFO(hashasocmark)); 5891 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5892 &SCTP_BASE_INFO(hashmark)); 5893 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5894 &SCTP_BASE_INFO(hashtcpmark)); 5895 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5896 5897 5898 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5899 &SCTP_BASE_INFO(hashvrfmark)); 5900 5901 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5902 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5903 /* init the zones */ 5904 /* 5905 * FIX ME: Should check for NULL returns, but if it does fail we are 5906 * doomed to panic anyways... add later maybe. 5907 */ 5908 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5909 sizeof(struct sctp_inpcb), maxsockets); 5910 5911 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5912 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5913 5914 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5915 sizeof(struct sctp_laddr), 5916 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5917 5918 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5919 sizeof(struct sctp_nets), 5920 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5921 5922 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5923 sizeof(struct sctp_tmit_chunk), 5924 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5925 5926 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5927 sizeof(struct sctp_queued_to_read), 5928 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5929 5930 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5931 sizeof(struct sctp_stream_queue_pending), 5932 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5933 5934 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5935 sizeof(struct sctp_asconf), 5936 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5937 5938 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5939 sizeof(struct sctp_asconf_ack), 5940 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5941 5942 5943 /* Master Lock INIT for info structure */ 5944 SCTP_INP_INFO_LOCK_INIT(); 5945 SCTP_STATLOG_INIT_LOCK(); 5946 5947 SCTP_IPI_COUNT_INIT(); 5948 SCTP_IPI_ADDR_INIT(); 5949 #ifdef SCTP_PACKET_LOGGING 5950 SCTP_IP_PKTLOG_INIT(); 5951 #endif 5952 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5953 5954 SCTP_WQ_ADDR_INIT(); 5955 /* not sure if we need all the counts */ 5956 SCTP_BASE_INFO(ipi_count_ep) = 0; 5957 /* assoc/tcb zone info */ 5958 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5959 /* local addrlist zone info */ 5960 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5961 /* remote addrlist zone info */ 5962 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5963 /* chunk info */ 5964 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5965 5966 /* socket queue zone info */ 5967 SCTP_BASE_INFO(ipi_count_readq) = 0; 5968 5969 /* stream out queue cont */ 5970 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5971 5972 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5973 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5974 5975 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5976 5977 /* Init the TIMEWAIT list */ 5978 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5979 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5980 } 5981 5982 sctp_startup_iterator(); 5983 5984 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5985 sctp_startup_mcore_threads(); 5986 #endif 5987 5988 /* 5989 * INIT the default VRF which for BSD is the only one, other O/S's 5990 * may have more. But initially they must start with one and then 5991 * add the VRF's as addresses are added. 5992 */ 5993 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5994 } 5995 5996 /* 5997 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5998 */ 5999 void 6000 sctp_pcb_finish(void) 6001 { 6002 struct sctp_vrflist *vrf_bucket; 6003 struct sctp_vrf *vrf, *nvrf; 6004 struct sctp_ifn *ifn, *nifn; 6005 struct sctp_ifa *ifa, *nifa; 6006 struct sctpvtaghead *chain; 6007 struct sctp_tagblock *twait_block, *prev_twait_block; 6008 struct sctp_laddr *wi, *nwi; 6009 int i; 6010 6011 /* 6012 * Free BSD the it thread never exits but we do clean up. The only 6013 * way freebsd reaches here if we have VRF's but we still add the 6014 * ifdef to make it compile on old versions. 6015 */ 6016 { 6017 struct sctp_iterator *it, *nit; 6018 6019 SCTP_IPI_ITERATOR_WQ_LOCK(); 6020 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 6021 if (it->vn != curvnet) { 6022 continue; 6023 } 6024 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6025 if (it->function_atend != NULL) { 6026 (*it->function_atend) (it->pointer, it->val); 6027 } 6028 SCTP_FREE(it, SCTP_M_ITER); 6029 } 6030 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6031 SCTP_ITERATOR_LOCK(); 6032 if ((sctp_it_ctl.cur_it) && 6033 (sctp_it_ctl.cur_it->vn == curvnet)) { 6034 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 6035 } 6036 SCTP_ITERATOR_UNLOCK(); 6037 } 6038 6039 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 6040 SCTP_WQ_ADDR_LOCK(); 6041 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 6042 LIST_REMOVE(wi, sctp_nxt_addr); 6043 SCTP_DECR_LADDR_COUNT(); 6044 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 6045 } 6046 SCTP_WQ_ADDR_UNLOCK(); 6047 6048 /* 6049 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 6050 * destroyed first). 6051 */ 6052 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 6053 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 6054 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 6055 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 6056 /* free the ifa */ 6057 LIST_REMOVE(ifa, next_bucket); 6058 LIST_REMOVE(ifa, next_ifa); 6059 SCTP_FREE(ifa, SCTP_M_IFA); 6060 } 6061 /* free the ifn */ 6062 LIST_REMOVE(ifn, next_bucket); 6063 LIST_REMOVE(ifn, next_ifn); 6064 SCTP_FREE(ifn, SCTP_M_IFN); 6065 } 6066 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 6067 /* free the vrf */ 6068 LIST_REMOVE(vrf, next_vrf); 6069 SCTP_FREE(vrf, SCTP_M_VRF); 6070 } 6071 /* free the vrf hashes */ 6072 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6073 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6074 6075 /* 6076 * free the TIMEWAIT list elements malloc'd in the function 6077 * sctp_add_vtag_to_timewait()... 6078 */ 6079 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6080 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6081 if (!LIST_EMPTY(chain)) { 6082 prev_twait_block = NULL; 6083 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6084 if (prev_twait_block) { 6085 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6086 } 6087 prev_twait_block = twait_block; 6088 } 6089 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6090 } 6091 } 6092 6093 /* free the locks and mutexes */ 6094 #ifdef SCTP_PACKET_LOGGING 6095 SCTP_IP_PKTLOG_DESTROY(); 6096 #endif 6097 SCTP_IPI_ADDR_DESTROY(); 6098 SCTP_STATLOG_DESTROY(); 6099 SCTP_INP_INFO_LOCK_DESTROY(); 6100 6101 SCTP_WQ_ADDR_DESTROY(); 6102 6103 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6104 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6105 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6106 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6107 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6108 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6109 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6110 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6111 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6112 /* Get rid of other stuff to */ 6113 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6114 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6115 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6116 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6117 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6118 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6119 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6120 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6121 #endif 6122 } 6123 6124 6125 int 6126 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6127 int iphlen, int offset, int limit, struct sctphdr *sh, 6128 struct sockaddr *altsa) 6129 { 6130 /* 6131 * grub through the INIT pulling addresses and loading them to the 6132 * nets structure in the asoc. The from address in the mbuf should 6133 * also be loaded (if it is not already). This routine can be called 6134 * with either INIT or INIT-ACK's as long as the m points to the IP 6135 * packet and the offset points to the beginning of the parameters. 6136 */ 6137 struct sctp_inpcb *inp, *l_inp; 6138 struct sctp_nets *net, *nnet, *net_tmp; 6139 struct ip *iph; 6140 struct sctp_paramhdr *phdr, parm_buf; 6141 struct sctp_tcb *stcb_tmp; 6142 uint16_t ptype, plen; 6143 struct sockaddr *sa; 6144 struct sockaddr_storage dest_store; 6145 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 6146 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6147 struct sctp_auth_random *p_random = NULL; 6148 uint16_t random_len = 0; 6149 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6150 struct sctp_auth_hmac_algo *hmacs = NULL; 6151 uint16_t hmacs_len = 0; 6152 uint8_t saw_asconf = 0; 6153 uint8_t saw_asconf_ack = 0; 6154 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6155 struct sctp_auth_chunk_list *chunks = NULL; 6156 uint16_t num_chunks = 0; 6157 sctp_key_t *new_key; 6158 uint32_t keylen; 6159 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6160 uint8_t ecn_allowed; 6161 6162 #ifdef INET 6163 struct sockaddr_in sin; 6164 6165 #endif 6166 #ifdef INET6 6167 struct sockaddr_in6 sin6; 6168 6169 #endif 6170 6171 /* First get the destination address setup too. */ 6172 #ifdef INET 6173 memset(&sin, 0, sizeof(sin)); 6174 sin.sin_family = AF_INET; 6175 sin.sin_len = sizeof(sin); 6176 sin.sin_port = stcb->rport; 6177 #endif 6178 #ifdef INET6 6179 memset(&sin6, 0, sizeof(sin6)); 6180 sin6.sin6_family = AF_INET6; 6181 sin6.sin6_len = sizeof(struct sockaddr_in6); 6182 sin6.sin6_port = stcb->rport; 6183 #endif 6184 iph = mtod(m, struct ip *); 6185 switch (iph->ip_v) { 6186 #ifdef INET 6187 case IPVERSION: 6188 { 6189 /* its IPv4 */ 6190 struct sockaddr_in *sin_2; 6191 6192 sin_2 = (struct sockaddr_in *)(local_sa); 6193 memset(sin_2, 0, sizeof(sin)); 6194 sin_2->sin_family = AF_INET; 6195 sin_2->sin_len = sizeof(sin); 6196 sin_2->sin_port = sh->dest_port; 6197 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 6198 if (altsa) { 6199 /* 6200 * For cookies we use the src address NOT 6201 * from the packet but from the original 6202 * INIT. 6203 */ 6204 sa = altsa; 6205 } else { 6206 sin.sin_addr = iph->ip_src; 6207 sa = (struct sockaddr *)&sin; 6208 } 6209 break; 6210 } 6211 #endif 6212 #ifdef INET6 6213 case IPV6_VERSION >> 4: 6214 { 6215 /* its IPv6 */ 6216 struct ip6_hdr *ip6; 6217 struct sockaddr_in6 *sin6_2; 6218 6219 ip6 = mtod(m, struct ip6_hdr *); 6220 sin6_2 = (struct sockaddr_in6 *)(local_sa); 6221 memset(sin6_2, 0, sizeof(sin6)); 6222 sin6_2->sin6_family = AF_INET6; 6223 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 6224 sin6_2->sin6_port = sh->dest_port; 6225 sin6_2->sin6_addr = ip6->ip6_dst; 6226 if (altsa) { 6227 /* 6228 * For cookies we use the src address NOT 6229 * from the packet but from the original 6230 * INIT. 6231 */ 6232 sa = altsa; 6233 } else { 6234 sin6.sin6_addr = ip6->ip6_src; 6235 sa = (struct sockaddr *)&sin6; 6236 } 6237 break; 6238 } 6239 #endif 6240 default: 6241 return (-1); 6242 break; 6243 } 6244 /* Turn off ECN until we get through all params */ 6245 ecn_allowed = 0; 6246 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6247 /* mark all addresses that we have currently on the list */ 6248 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6249 } 6250 /* does the source address already exist? if so skip it */ 6251 l_inp = inp = stcb->sctp_ep; 6252 6253 atomic_add_int(&stcb->asoc.refcnt, 1); 6254 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 6255 atomic_add_int(&stcb->asoc.refcnt, -1); 6256 6257 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6258 /* we must add the source address */ 6259 /* no scope set here since we have a tcb already. */ 6260 switch (sa->sa_family) { 6261 #ifdef INET 6262 case AF_INET: 6263 if (stcb->asoc.ipv4_addr_legal) { 6264 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6265 return (-1); 6266 } 6267 } 6268 break; 6269 #endif 6270 #ifdef INET6 6271 case AF_INET6: 6272 if (stcb->asoc.ipv6_addr_legal) { 6273 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6274 return (-2); 6275 } 6276 } 6277 break; 6278 #endif 6279 default: 6280 break; 6281 } 6282 } else { 6283 if (net_tmp != NULL && stcb_tmp == stcb) { 6284 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6285 } else if (stcb_tmp != stcb) { 6286 /* It belongs to another association? */ 6287 if (stcb_tmp) 6288 SCTP_TCB_UNLOCK(stcb_tmp); 6289 return (-3); 6290 } 6291 } 6292 if (stcb->asoc.state == 0) { 6293 /* the assoc was freed? */ 6294 return (-4); 6295 } 6296 /* 6297 * peer must explicitly turn this on. This may have been initialized 6298 * to be "on" in order to allow local addr changes while INIT's are 6299 * in flight. 6300 */ 6301 stcb->asoc.peer_supports_asconf = 0; 6302 /* now we must go through each of the params. */ 6303 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6304 while (phdr) { 6305 ptype = ntohs(phdr->param_type); 6306 plen = ntohs(phdr->param_length); 6307 /* 6308 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 6309 * (int)plen); 6310 */ 6311 if (offset + plen > limit) { 6312 break; 6313 } 6314 if (plen == 0) { 6315 break; 6316 } 6317 #ifdef INET 6318 if (ptype == SCTP_IPV4_ADDRESS) { 6319 if (stcb->asoc.ipv4_addr_legal) { 6320 struct sctp_ipv4addr_param *p4, p4_buf; 6321 6322 /* ok get the v4 address and check/add */ 6323 phdr = sctp_get_next_param(m, offset, 6324 (struct sctp_paramhdr *)&p4_buf, 6325 sizeof(p4_buf)); 6326 if (plen != sizeof(struct sctp_ipv4addr_param) || 6327 phdr == NULL) { 6328 return (-5); 6329 } 6330 p4 = (struct sctp_ipv4addr_param *)phdr; 6331 sin.sin_addr.s_addr = p4->addr; 6332 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6333 /* Skip multi-cast addresses */ 6334 goto next_param; 6335 } 6336 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6337 (sin.sin_addr.s_addr == INADDR_ANY)) { 6338 goto next_param; 6339 } 6340 sa = (struct sockaddr *)&sin; 6341 inp = stcb->sctp_ep; 6342 atomic_add_int(&stcb->asoc.refcnt, 1); 6343 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6344 local_sa, stcb); 6345 atomic_add_int(&stcb->asoc.refcnt, -1); 6346 6347 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6348 inp == NULL) { 6349 /* we must add the source address */ 6350 /* 6351 * no scope set since we have a tcb 6352 * already 6353 */ 6354 6355 /* 6356 * we must validate the state again 6357 * here 6358 */ 6359 add_it_now: 6360 if (stcb->asoc.state == 0) { 6361 /* the assoc was freed? */ 6362 return (-7); 6363 } 6364 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6365 return (-8); 6366 } 6367 } else if (stcb_tmp == stcb) { 6368 if (stcb->asoc.state == 0) { 6369 /* the assoc was freed? */ 6370 return (-10); 6371 } 6372 if (net != NULL) { 6373 /* clear flag */ 6374 net->dest_state &= 6375 ~SCTP_ADDR_NOT_IN_ASSOC; 6376 } 6377 } else { 6378 /* 6379 * strange, address is in another 6380 * assoc? straighten out locks. 6381 */ 6382 if (stcb_tmp) { 6383 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6384 /* 6385 * in setup state we 6386 * abort this guy 6387 */ 6388 sctp_abort_an_association(stcb_tmp->sctp_ep, 6389 stcb_tmp, 1, NULL, 0); 6390 goto add_it_now; 6391 } 6392 SCTP_TCB_UNLOCK(stcb_tmp); 6393 } 6394 if (stcb->asoc.state == 0) { 6395 /* the assoc was freed? */ 6396 return (-12); 6397 } 6398 return (-13); 6399 } 6400 } 6401 } else 6402 #endif 6403 #ifdef INET6 6404 if (ptype == SCTP_IPV6_ADDRESS) { 6405 if (stcb->asoc.ipv6_addr_legal) { 6406 /* ok get the v6 address and check/add */ 6407 struct sctp_ipv6addr_param *p6, p6_buf; 6408 6409 phdr = sctp_get_next_param(m, offset, 6410 (struct sctp_paramhdr *)&p6_buf, 6411 sizeof(p6_buf)); 6412 if (plen != sizeof(struct sctp_ipv6addr_param) || 6413 phdr == NULL) { 6414 return (-14); 6415 } 6416 p6 = (struct sctp_ipv6addr_param *)phdr; 6417 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6418 sizeof(p6->addr)); 6419 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6420 /* Skip multi-cast addresses */ 6421 goto next_param; 6422 } 6423 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6424 /* 6425 * Link local make no sense without 6426 * scope 6427 */ 6428 goto next_param; 6429 } 6430 sa = (struct sockaddr *)&sin6; 6431 inp = stcb->sctp_ep; 6432 atomic_add_int(&stcb->asoc.refcnt, 1); 6433 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6434 local_sa, stcb); 6435 atomic_add_int(&stcb->asoc.refcnt, -1); 6436 if (stcb_tmp == NULL && 6437 (inp == stcb->sctp_ep || inp == NULL)) { 6438 /* 6439 * we must validate the state again 6440 * here 6441 */ 6442 add_it_now6: 6443 if (stcb->asoc.state == 0) { 6444 /* the assoc was freed? */ 6445 return (-16); 6446 } 6447 /* 6448 * we must add the address, no scope 6449 * set 6450 */ 6451 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6452 return (-17); 6453 } 6454 } else if (stcb_tmp == stcb) { 6455 /* 6456 * we must validate the state again 6457 * here 6458 */ 6459 if (stcb->asoc.state == 0) { 6460 /* the assoc was freed? */ 6461 return (-19); 6462 } 6463 if (net != NULL) { 6464 /* clear flag */ 6465 net->dest_state &= 6466 ~SCTP_ADDR_NOT_IN_ASSOC; 6467 } 6468 } else { 6469 /* 6470 * strange, address is in another 6471 * assoc? straighten out locks. 6472 */ 6473 if (stcb_tmp) 6474 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6475 /* 6476 * in setup state we 6477 * abort this guy 6478 */ 6479 sctp_abort_an_association(stcb_tmp->sctp_ep, 6480 stcb_tmp, 1, NULL, 0); 6481 goto add_it_now6; 6482 } 6483 SCTP_TCB_UNLOCK(stcb_tmp); 6484 6485 if (stcb->asoc.state == 0) { 6486 /* the assoc was freed? */ 6487 return (-21); 6488 } 6489 return (-22); 6490 } 6491 } 6492 } else 6493 #endif 6494 if (ptype == SCTP_ECN_CAPABLE) { 6495 ecn_allowed = 1; 6496 } else if (ptype == SCTP_ULP_ADAPTATION) { 6497 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6498 struct sctp_adaptation_layer_indication ai, 6499 *aip; 6500 6501 phdr = sctp_get_next_param(m, offset, 6502 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6503 aip = (struct sctp_adaptation_layer_indication *)phdr; 6504 if (aip) { 6505 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6506 stcb->asoc.adaptation_needed = 1; 6507 } 6508 } 6509 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6510 struct sctp_asconf_addr_param lstore, *fee; 6511 int lptype; 6512 struct sockaddr *lsa = NULL; 6513 6514 #ifdef INET 6515 struct sctp_asconf_addrv4_param *fii; 6516 6517 #endif 6518 6519 stcb->asoc.peer_supports_asconf = 1; 6520 if (plen > sizeof(lstore)) { 6521 return (-23); 6522 } 6523 phdr = sctp_get_next_param(m, offset, 6524 (struct sctp_paramhdr *)&lstore, 6525 min(plen, sizeof(lstore))); 6526 if (phdr == NULL) { 6527 return (-24); 6528 } 6529 fee = (struct sctp_asconf_addr_param *)phdr; 6530 lptype = ntohs(fee->addrp.ph.param_type); 6531 switch (lptype) { 6532 #ifdef INET 6533 case SCTP_IPV4_ADDRESS: 6534 if (plen != 6535 sizeof(struct sctp_asconf_addrv4_param)) { 6536 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6537 (int)sizeof(struct sctp_asconf_addrv4_param), 6538 plen); 6539 } else { 6540 fii = (struct sctp_asconf_addrv4_param *)fee; 6541 sin.sin_addr.s_addr = fii->addrp.addr; 6542 lsa = (struct sockaddr *)&sin; 6543 } 6544 break; 6545 #endif 6546 #ifdef INET6 6547 case SCTP_IPV6_ADDRESS: 6548 if (plen != 6549 sizeof(struct sctp_asconf_addr_param)) { 6550 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6551 (int)sizeof(struct sctp_asconf_addr_param), 6552 plen); 6553 } else { 6554 memcpy(sin6.sin6_addr.s6_addr, 6555 fee->addrp.addr, 6556 sizeof(fee->addrp.addr)); 6557 lsa = (struct sockaddr *)&sin6; 6558 } 6559 break; 6560 #endif 6561 default: 6562 break; 6563 } 6564 if (lsa) { 6565 (void)sctp_set_primary_addr(stcb, sa, NULL); 6566 } 6567 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6568 stcb->asoc.peer_supports_nat = 1; 6569 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6570 /* Peer supports pr-sctp */ 6571 stcb->asoc.peer_supports_prsctp = 1; 6572 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6573 /* A supported extension chunk */ 6574 struct sctp_supported_chunk_types_param *pr_supported; 6575 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6576 int num_ent, i; 6577 6578 phdr = sctp_get_next_param(m, offset, 6579 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6580 if (phdr == NULL) { 6581 return (-25); 6582 } 6583 stcb->asoc.peer_supports_asconf = 0; 6584 stcb->asoc.peer_supports_prsctp = 0; 6585 stcb->asoc.peer_supports_pktdrop = 0; 6586 stcb->asoc.peer_supports_strreset = 0; 6587 stcb->asoc.peer_supports_nr_sack = 0; 6588 stcb->asoc.peer_supports_auth = 0; 6589 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6590 num_ent = plen - sizeof(struct sctp_paramhdr); 6591 for (i = 0; i < num_ent; i++) { 6592 switch (pr_supported->chunk_types[i]) { 6593 case SCTP_ASCONF: 6594 case SCTP_ASCONF_ACK: 6595 stcb->asoc.peer_supports_asconf = 1; 6596 break; 6597 case SCTP_FORWARD_CUM_TSN: 6598 stcb->asoc.peer_supports_prsctp = 1; 6599 break; 6600 case SCTP_PACKET_DROPPED: 6601 stcb->asoc.peer_supports_pktdrop = 1; 6602 break; 6603 case SCTP_NR_SELECTIVE_ACK: 6604 stcb->asoc.peer_supports_nr_sack = 1; 6605 break; 6606 case SCTP_STREAM_RESET: 6607 stcb->asoc.peer_supports_strreset = 1; 6608 break; 6609 case SCTP_AUTHENTICATION: 6610 stcb->asoc.peer_supports_auth = 1; 6611 break; 6612 default: 6613 /* one I have not learned yet */ 6614 break; 6615 6616 } 6617 } 6618 } else if (ptype == SCTP_RANDOM) { 6619 if (plen > sizeof(random_store)) 6620 break; 6621 if (got_random) { 6622 /* already processed a RANDOM */ 6623 goto next_param; 6624 } 6625 phdr = sctp_get_next_param(m, offset, 6626 (struct sctp_paramhdr *)random_store, 6627 min(sizeof(random_store), plen)); 6628 if (phdr == NULL) 6629 return (-26); 6630 p_random = (struct sctp_auth_random *)phdr; 6631 random_len = plen - sizeof(*p_random); 6632 /* enforce the random length */ 6633 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6634 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6635 return (-27); 6636 } 6637 got_random = 1; 6638 } else if (ptype == SCTP_HMAC_LIST) { 6639 int num_hmacs; 6640 int i; 6641 6642 if (plen > sizeof(hmacs_store)) 6643 break; 6644 if (got_hmacs) { 6645 /* already processed a HMAC list */ 6646 goto next_param; 6647 } 6648 phdr = sctp_get_next_param(m, offset, 6649 (struct sctp_paramhdr *)hmacs_store, 6650 min(plen, sizeof(hmacs_store))); 6651 if (phdr == NULL) 6652 return (-28); 6653 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6654 hmacs_len = plen - sizeof(*hmacs); 6655 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6656 /* validate the hmac list */ 6657 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6658 return (-29); 6659 } 6660 if (stcb->asoc.peer_hmacs != NULL) 6661 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6662 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6663 if (stcb->asoc.peer_hmacs != NULL) { 6664 for (i = 0; i < num_hmacs; i++) { 6665 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6666 ntohs(hmacs->hmac_ids[i])); 6667 } 6668 } 6669 got_hmacs = 1; 6670 } else if (ptype == SCTP_CHUNK_LIST) { 6671 int i; 6672 6673 if (plen > sizeof(chunks_store)) 6674 break; 6675 if (got_chklist) { 6676 /* already processed a Chunks list */ 6677 goto next_param; 6678 } 6679 phdr = sctp_get_next_param(m, offset, 6680 (struct sctp_paramhdr *)chunks_store, 6681 min(plen, sizeof(chunks_store))); 6682 if (phdr == NULL) 6683 return (-30); 6684 chunks = (struct sctp_auth_chunk_list *)phdr; 6685 num_chunks = plen - sizeof(*chunks); 6686 if (stcb->asoc.peer_auth_chunks != NULL) 6687 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6688 else 6689 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6690 for (i = 0; i < num_chunks; i++) { 6691 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6692 stcb->asoc.peer_auth_chunks); 6693 /* record asconf/asconf-ack if listed */ 6694 if (chunks->chunk_types[i] == SCTP_ASCONF) 6695 saw_asconf = 1; 6696 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6697 saw_asconf_ack = 1; 6698 6699 } 6700 got_chklist = 1; 6701 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6702 (ptype == SCTP_STATE_COOKIE) || 6703 (ptype == SCTP_UNRECOG_PARAM) || 6704 (ptype == SCTP_COOKIE_PRESERVE) || 6705 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6706 (ptype == SCTP_ADD_IP_ADDRESS) || 6707 (ptype == SCTP_DEL_IP_ADDRESS) || 6708 (ptype == SCTP_ERROR_CAUSE_IND) || 6709 (ptype == SCTP_SUCCESS_REPORT)) { 6710 /* don't care */ ; 6711 } else { 6712 if ((ptype & 0x8000) == 0x0000) { 6713 /* 6714 * must stop processing the rest of the 6715 * param's. Any report bits were handled 6716 * with the call to 6717 * sctp_arethere_unrecognized_parameters() 6718 * when the INIT or INIT-ACK was first seen. 6719 */ 6720 break; 6721 } 6722 } 6723 6724 next_param: 6725 offset += SCTP_SIZE32(plen); 6726 if (offset >= limit) { 6727 break; 6728 } 6729 phdr = sctp_get_next_param(m, offset, &parm_buf, 6730 sizeof(parm_buf)); 6731 } 6732 /* Now check to see if we need to purge any addresses */ 6733 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6734 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6735 SCTP_ADDR_NOT_IN_ASSOC) { 6736 /* This address has been removed from the asoc */ 6737 /* remove and free it */ 6738 stcb->asoc.numnets--; 6739 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6740 sctp_free_remote_addr(net); 6741 if (net == stcb->asoc.primary_destination) { 6742 stcb->asoc.primary_destination = NULL; 6743 sctp_select_primary_destination(stcb); 6744 } 6745 } 6746 } 6747 if (ecn_allowed == 0) { 6748 stcb->asoc.ecn_allowed = 0; 6749 } 6750 /* validate authentication required parameters */ 6751 if (got_random && got_hmacs) { 6752 stcb->asoc.peer_supports_auth = 1; 6753 } else { 6754 stcb->asoc.peer_supports_auth = 0; 6755 } 6756 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6757 /* peer does not support auth but sent a chunks list? */ 6758 return (-31); 6759 } 6760 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6761 !stcb->asoc.peer_supports_auth) { 6762 /* peer supports asconf but not auth? */ 6763 return (-32); 6764 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6765 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6766 return (-33); 6767 } 6768 /* concatenate the full random key */ 6769 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6770 if (chunks != NULL) { 6771 keylen += sizeof(*chunks) + num_chunks; 6772 } 6773 new_key = sctp_alloc_key(keylen); 6774 if (new_key != NULL) { 6775 /* copy in the RANDOM */ 6776 if (p_random != NULL) { 6777 keylen = sizeof(*p_random) + random_len; 6778 bcopy(p_random, new_key->key, keylen); 6779 } 6780 /* append in the AUTH chunks */ 6781 if (chunks != NULL) { 6782 bcopy(chunks, new_key->key + keylen, 6783 sizeof(*chunks) + num_chunks); 6784 keylen += sizeof(*chunks) + num_chunks; 6785 } 6786 /* append in the HMACs */ 6787 if (hmacs != NULL) { 6788 bcopy(hmacs, new_key->key + keylen, 6789 sizeof(*hmacs) + hmacs_len); 6790 } 6791 } else { 6792 /* failed to get memory for the key */ 6793 return (-34); 6794 } 6795 if (stcb->asoc.authinfo.peer_random != NULL) 6796 sctp_free_key(stcb->asoc.authinfo.peer_random); 6797 stcb->asoc.authinfo.peer_random = new_key; 6798 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6799 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6800 6801 return (0); 6802 } 6803 6804 int 6805 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6806 struct sctp_nets *net) 6807 { 6808 /* make sure the requested primary address exists in the assoc */ 6809 if (net == NULL && sa) 6810 net = sctp_findnet(stcb, sa); 6811 6812 if (net == NULL) { 6813 /* didn't find the requested primary address! */ 6814 return (-1); 6815 } else { 6816 /* set the primary address */ 6817 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6818 /* Must be confirmed, so queue to set */ 6819 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6820 return (0); 6821 } 6822 stcb->asoc.primary_destination = net; 6823 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6824 sctp_free_remote_addr(stcb->asoc.alternate); 6825 stcb->asoc.alternate = NULL; 6826 } 6827 net = TAILQ_FIRST(&stcb->asoc.nets); 6828 if (net != stcb->asoc.primary_destination) { 6829 /* 6830 * first one on the list is NOT the primary 6831 * sctp_cmpaddr() is much more efficient if the 6832 * primary is the first on the list, make it so. 6833 */ 6834 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6835 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6836 } 6837 return (0); 6838 } 6839 } 6840 6841 int 6842 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6843 { 6844 /* 6845 * This function serves two purposes. It will see if a TAG can be 6846 * re-used and return 1 for yes it is ok and 0 for don't use that 6847 * tag. A secondary function it will do is purge out old tags that 6848 * can be removed. 6849 */ 6850 struct sctpvtaghead *chain; 6851 struct sctp_tagblock *twait_block; 6852 struct sctpasochead *head; 6853 struct sctp_tcb *stcb; 6854 int i; 6855 6856 SCTP_INP_INFO_RLOCK(); 6857 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6858 SCTP_BASE_INFO(hashasocmark))]; 6859 if (head == NULL) { 6860 /* invalid vtag */ 6861 goto skip_vtag_check; 6862 } 6863 LIST_FOREACH(stcb, head, sctp_asocs) { 6864 /* 6865 * We choose not to lock anything here. TCB's can't be 6866 * removed since we have the read lock, so they can't be 6867 * freed on us, same thing for the INP. I may be wrong with 6868 * this assumption, but we will go with it for now :-) 6869 */ 6870 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6871 continue; 6872 } 6873 if (stcb->asoc.my_vtag == tag) { 6874 /* candidate */ 6875 if (stcb->rport != rport) { 6876 continue; 6877 } 6878 if (stcb->sctp_ep->sctp_lport != lport) { 6879 continue; 6880 } 6881 /* Its a used tag set */ 6882 SCTP_INP_INFO_RUNLOCK(); 6883 return (0); 6884 } 6885 } 6886 skip_vtag_check: 6887 6888 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6889 /* Now what about timed wait ? */ 6890 if (!LIST_EMPTY(chain)) { 6891 /* 6892 * Block(s) are present, lets see if we have this tag in the 6893 * list 6894 */ 6895 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6896 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6897 if (twait_block->vtag_block[i].v_tag == 0) { 6898 /* not used */ 6899 continue; 6900 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6901 now->tv_sec) { 6902 /* Audit expires this guy */ 6903 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6904 twait_block->vtag_block[i].v_tag = 0; 6905 twait_block->vtag_block[i].lport = 0; 6906 twait_block->vtag_block[i].rport = 0; 6907 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6908 (twait_block->vtag_block[i].lport == lport) && 6909 (twait_block->vtag_block[i].rport == rport)) { 6910 /* Bad tag, sorry :< */ 6911 SCTP_INP_INFO_RUNLOCK(); 6912 return (0); 6913 } 6914 } 6915 } 6916 } 6917 SCTP_INP_INFO_RUNLOCK(); 6918 return (1); 6919 } 6920 6921 6922 static sctp_assoc_t reneged_asoc_ids[256]; 6923 static uint8_t reneged_at = 0; 6924 6925 6926 static void 6927 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6928 { 6929 /* 6930 * We must hunt this association for MBUF's past the cumack (i.e. 6931 * out of order data that we can renege on). 6932 */ 6933 struct sctp_association *asoc; 6934 struct sctp_tmit_chunk *chk, *nchk; 6935 uint32_t cumulative_tsn_p1; 6936 struct sctp_queued_to_read *ctl, *nctl; 6937 int cnt, strmat; 6938 uint32_t gap, i; 6939 int fnd = 0; 6940 6941 /* We look for anything larger than the cum-ack + 1 */ 6942 6943 asoc = &stcb->asoc; 6944 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6945 /* none we can reneg on. */ 6946 return; 6947 } 6948 SCTP_STAT_INCR(sctps_protocol_drains_done); 6949 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6950 cnt = 0; 6951 /* First look in the re-assembly queue */ 6952 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6953 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6954 /* Yep it is above cum-ack */ 6955 cnt++; 6956 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6957 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6958 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6959 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6960 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6961 if (chk->data) { 6962 sctp_m_freem(chk->data); 6963 chk->data = NULL; 6964 } 6965 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6966 } 6967 } 6968 /* Ok that was fun, now we will drain all the inbound streams? */ 6969 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6970 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6971 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6972 /* Yep it is above cum-ack */ 6973 cnt++; 6974 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6975 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6976 sctp_ucount_decr(asoc->cnt_on_all_streams); 6977 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6978 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6979 if (ctl->data) { 6980 sctp_m_freem(ctl->data); 6981 ctl->data = NULL; 6982 } 6983 sctp_free_remote_addr(ctl->whoFrom); 6984 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6985 SCTP_DECR_READQ_COUNT(); 6986 } 6987 } 6988 } 6989 if (cnt) { 6990 /* We must back down to see what the new highest is */ 6991 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6992 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6993 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6994 asoc->highest_tsn_inside_map = i; 6995 fnd = 1; 6996 break; 6997 } 6998 } 6999 if (!fnd) { 7000 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 7001 } 7002 /* 7003 * Question, should we go through the delivery queue? The 7004 * only reason things are on here is the app not reading OR 7005 * a p-d-api up. An attacker COULD send enough in to 7006 * initiate the PD-API and then send a bunch of stuff to 7007 * other streams... these would wind up on the delivery 7008 * queue.. and then we would not get to them. But in order 7009 * to do this I then have to back-track and un-deliver 7010 * sequence numbers in streams.. el-yucko. I think for now 7011 * we will NOT look at the delivery queue and leave it to be 7012 * something to consider later. An alternative would be to 7013 * abort the P-D-API with a notification and then deliver 7014 * the data.... Or another method might be to keep track of 7015 * how many times the situation occurs and if we see a 7016 * possible attack underway just abort the association. 7017 */ 7018 #ifdef SCTP_DEBUG 7019 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 7020 #endif 7021 /* 7022 * Now do we need to find a new 7023 * asoc->highest_tsn_inside_map? 7024 */ 7025 asoc->last_revoke_count = cnt; 7026 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 7027 /* sa_ignore NO_NULL_CHK */ 7028 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 7029 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 7030 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 7031 reneged_at++; 7032 } 7033 /* 7034 * Another issue, in un-setting the TSN's in the mapping array we 7035 * DID NOT adjust the highest_tsn marker. This will cause one of 7036 * two things to occur. It may cause us to do extra work in checking 7037 * for our mapping array movement. More importantly it may cause us 7038 * to SACK every datagram. This may not be a bad thing though since 7039 * we will recover once we get our cum-ack above and all this stuff 7040 * we dumped recovered. 7041 */ 7042 } 7043 7044 void 7045 sctp_drain() 7046 { 7047 /* 7048 * We must walk the PCB lists for ALL associations here. The system 7049 * is LOW on MBUF's and needs help. This is where reneging will 7050 * occur. We really hope this does NOT happen! 7051 */ 7052 VNET_ITERATOR_DECL(vnet_iter); 7053 VNET_LIST_RLOCK_NOSLEEP(); 7054 VNET_FOREACH(vnet_iter) { 7055 CURVNET_SET(vnet_iter); 7056 struct sctp_inpcb *inp; 7057 struct sctp_tcb *stcb; 7058 7059 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7060 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7061 #ifdef VIMAGE 7062 continue; 7063 #else 7064 return; 7065 #endif 7066 } 7067 SCTP_INP_INFO_RLOCK(); 7068 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7069 /* For each endpoint */ 7070 SCTP_INP_RLOCK(inp); 7071 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7072 /* For each association */ 7073 SCTP_TCB_LOCK(stcb); 7074 sctp_drain_mbufs(inp, stcb); 7075 SCTP_TCB_UNLOCK(stcb); 7076 } 7077 SCTP_INP_RUNLOCK(inp); 7078 } 7079 SCTP_INP_INFO_RUNLOCK(); 7080 CURVNET_RESTORE(); 7081 } 7082 VNET_LIST_RUNLOCK_NOSLEEP(); 7083 } 7084 7085 /* 7086 * start a new iterator 7087 * iterates through all endpoints and associations based on the pcb_state 7088 * flags and asoc_state. "af" (mandatory) is executed for all matching 7089 * assocs and "ef" (optional) is executed when the iterator completes. 7090 * "inpf" (optional) is executed for each new endpoint as it is being 7091 * iterated through. inpe (optional) is called when the inp completes 7092 * its way through all the stcbs. 7093 */ 7094 int 7095 sctp_initiate_iterator(inp_func inpf, 7096 asoc_func af, 7097 inp_func inpe, 7098 uint32_t pcb_state, 7099 uint32_t pcb_features, 7100 uint32_t asoc_state, 7101 void *argp, 7102 uint32_t argi, 7103 end_func ef, 7104 struct sctp_inpcb *s_inp, 7105 uint8_t chunk_output_off) 7106 { 7107 struct sctp_iterator *it = NULL; 7108 7109 if (af == NULL) { 7110 return (-1); 7111 } 7112 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7113 SCTP_M_ITER); 7114 if (it == NULL) { 7115 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7116 return (ENOMEM); 7117 } 7118 memset(it, 0, sizeof(*it)); 7119 it->function_assoc = af; 7120 it->function_inp = inpf; 7121 if (inpf) 7122 it->done_current_ep = 0; 7123 else 7124 it->done_current_ep = 1; 7125 it->function_atend = ef; 7126 it->pointer = argp; 7127 it->val = argi; 7128 it->pcb_flags = pcb_state; 7129 it->pcb_features = pcb_features; 7130 it->asoc_state = asoc_state; 7131 it->function_inp_end = inpe; 7132 it->no_chunk_output = chunk_output_off; 7133 it->vn = curvnet; 7134 if (s_inp) { 7135 /* Assume lock is held here */ 7136 it->inp = s_inp; 7137 SCTP_INP_INCR_REF(it->inp); 7138 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7139 } else { 7140 SCTP_INP_INFO_RLOCK(); 7141 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7142 if (it->inp) { 7143 SCTP_INP_INCR_REF(it->inp); 7144 } 7145 SCTP_INP_INFO_RUNLOCK(); 7146 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7147 7148 } 7149 SCTP_IPI_ITERATOR_WQ_LOCK(); 7150 7151 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7152 if (sctp_it_ctl.iterator_running == 0) { 7153 sctp_wakeup_iterator(); 7154 } 7155 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7156 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7157 return (0); 7158 } 7159