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