1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #include <sys/proc.h> 40 #include <netinet/sctp_var.h> 41 #include <netinet/sctp_sysctl.h> 42 #include <netinet/sctp_pcb.h> 43 #include <netinet/sctputil.h> 44 #include <netinet/sctp.h> 45 #include <netinet/sctp_header.h> 46 #include <netinet/sctp_asconf.h> 47 #include <netinet/sctp_output.h> 48 #include <netinet/sctp_timer.h> 49 #include <netinet/sctp_bsd_addr.h> 50 #include <netinet/sctp_dtrace_define.h> 51 #include <netinet/udp.h> 52 #ifdef INET6 53 #include <netinet6/ip6_var.h> 54 #endif 55 #include <sys/sched.h> 56 #include <sys/smp.h> 57 #include <sys/unistd.h> 58 59 60 VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62 /* FIX: we don't handle multiple link local scopes */ 63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64 #ifdef INET6 65 int 66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67 { 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return 0; 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return 0; 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79 } 80 81 #endif 82 83 void 84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85 { 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 100 SCTP_INP_INFO_RUNLOCK(); 101 } 102 103 /* 104 * Addresses are added to VRF's (Virtual Router's). For BSD we 105 * have only the default VRF 0. We maintain a hash list of 106 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 107 * these has a list of addresses. When we add a new address 108 * to a VRF we lookup the ifn/ifn_index, if the ifn does 109 * not exist we create it and add it to the list of IFN's 110 * within the VRF. Once we have the sctp_ifn, we add the 111 * address to the list. So we look something like: 112 * 113 * hash-vrf-table 114 * vrf-> ifn-> ifn -> ifn 115 * vrf | 116 * ... +--ifa-> ifa -> ifa 117 * vrf 118 * 119 * We keep these separate lists since the SCTP subsystem will 120 * point to these from its source address selection nets structure. 121 * When an address is deleted it does not happen right away on 122 * the SCTP side, it gets scheduled. What we do when a 123 * delete happens is immediately remove the address from 124 * the master list and decrement the refcount. As our 125 * addip iterator works through and frees the src address 126 * selection pointing to the sctp_ifa, eventually the refcount 127 * will reach 0 and we will delete it. Note that it is assumed 128 * that any locking on system level ifn/ifa is done at the 129 * caller of these functions and these routines will only 130 * lock the SCTP structures as they add or delete things. 131 * 132 * Other notes on VRF concepts. 133 * - An endpoint can be in multiple VRF's 134 * - An association lives within a VRF and only one VRF. 135 * - Any incoming packet we can deduce the VRF for by 136 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 137 * - Any downward send call or connect call must supply the 138 * VRF via ancillary data or via some sort of set default 139 * VRF socket option call (again for BSD no brainer since 140 * the VRF is always 0). 141 * - An endpoint may add multiple VRF's to it. 142 * - Listening sockets can accept associations in any 143 * of the VRF's they are in but the assoc will end up 144 * in only one VRF (gotten from the packet or connect/send). 145 * 146 */ 147 148 struct sctp_vrf * 149 sctp_allocate_vrf(int vrf_id) 150 { 151 struct sctp_vrf *vrf = NULL; 152 struct sctp_vrflist *bucket; 153 154 /* First allocate the VRF structure */ 155 vrf = sctp_find_vrf(vrf_id); 156 if (vrf) { 157 /* Already allocated */ 158 return (vrf); 159 } 160 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 161 SCTP_M_VRF); 162 if (vrf == NULL) { 163 /* No memory */ 164 #ifdef INVARIANTS 165 panic("No memory for VRF:%d", vrf_id); 166 #endif 167 return (NULL); 168 } 169 /* setup the VRF */ 170 memset(vrf, 0, sizeof(struct sctp_vrf)); 171 vrf->vrf_id = vrf_id; 172 LIST_INIT(&vrf->ifnlist); 173 vrf->total_ifa_count = 0; 174 vrf->refcount = 0; 175 /* now also setup table ids */ 176 SCTP_INIT_VRF_TABLEID(vrf); 177 /* Init the HASH of addresses */ 178 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 179 &vrf->vrf_addr_hashmark); 180 if (vrf->vrf_addr_hash == NULL) { 181 /* No memory */ 182 #ifdef INVARIANTS 183 panic("No memory for VRF:%d", vrf_id); 184 #endif 185 SCTP_FREE(vrf, SCTP_M_VRF); 186 return (NULL); 187 } 188 /* Add it to the hash table */ 189 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 190 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 191 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 192 return (vrf); 193 } 194 195 196 struct sctp_ifn * 197 sctp_find_ifn(void *ifn, uint32_t ifn_index) 198 { 199 struct sctp_ifn *sctp_ifnp; 200 struct sctp_ifnlist *hash_ifn_head; 201 202 /* 203 * We assume the lock is held for the addresses if that's wrong 204 * problems could occur :-) 205 */ 206 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 207 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 208 if (sctp_ifnp->ifn_index == ifn_index) { 209 return (sctp_ifnp); 210 } 211 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 212 return (sctp_ifnp); 213 } 214 } 215 return (NULL); 216 } 217 218 219 220 struct sctp_vrf * 221 sctp_find_vrf(uint32_t vrf_id) 222 { 223 struct sctp_vrflist *bucket; 224 struct sctp_vrf *liste; 225 226 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 227 LIST_FOREACH(liste, bucket, next_vrf) { 228 if (vrf_id == liste->vrf_id) { 229 return (liste); 230 } 231 } 232 return (NULL); 233 } 234 235 void 236 sctp_free_vrf(struct sctp_vrf *vrf) 237 { 238 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 239 if (vrf->vrf_addr_hash) { 240 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 241 vrf->vrf_addr_hash = NULL; 242 } 243 /* We zero'd the count */ 244 LIST_REMOVE(vrf, next_vrf); 245 SCTP_FREE(vrf, SCTP_M_VRF); 246 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 247 } 248 } 249 250 void 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252 { 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261 } 262 263 void 264 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 265 { 266 struct sctp_ifn *sctp_ifnp; 267 268 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 269 if (sctp_ifnp != NULL) { 270 sctp_ifnp->ifn_mtu = mtu; 271 } 272 } 273 274 275 void 276 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 277 { 278 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 279 /* We zero'd the count */ 280 if (sctp_ifap->ifn_p) { 281 sctp_free_ifn(sctp_ifap->ifn_p); 282 } 283 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 284 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 285 } 286 } 287 288 static void 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 290 { 291 struct sctp_ifn *found; 292 293 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 294 if (found == NULL) { 295 /* Not in the list.. sorry */ 296 return; 297 } 298 if (hold_addr_lock == 0) 299 SCTP_IPI_ADDR_WLOCK(); 300 LIST_REMOVE(sctp_ifnp, next_bucket); 301 LIST_REMOVE(sctp_ifnp, next_ifn); 302 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 303 sctp_ifnp->registered_af); 304 if (hold_addr_lock == 0) 305 SCTP_IPI_ADDR_WUNLOCK(); 306 /* Take away the reference, and possibly free it */ 307 sctp_free_ifn(sctp_ifnp); 308 } 309 310 void 311 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 312 const char *if_name, uint32_t ifn_index) 313 { 314 struct sctp_vrf *vrf; 315 struct sctp_ifa *sctp_ifap = NULL; 316 317 SCTP_IPI_ADDR_RLOCK(); 318 vrf = sctp_find_vrf(vrf_id); 319 if (vrf == NULL) { 320 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 321 goto out; 322 323 } 324 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 325 if (sctp_ifap == NULL) { 326 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 327 goto out; 328 } 329 if (sctp_ifap->ifn_p == NULL) { 330 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 331 goto out; 332 } 333 if (if_name) { 334 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 335 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 336 sctp_ifap->ifn_p->ifn_name, if_name); 337 goto out; 338 } 339 } else { 340 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 341 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 342 sctp_ifap->ifn_p->ifn_index, ifn_index); 343 goto out; 344 } 345 } 346 347 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 348 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 349 out: 350 SCTP_IPI_ADDR_RUNLOCK(); 351 } 352 353 void 354 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 355 const char *if_name, uint32_t ifn_index) 356 { 357 struct sctp_vrf *vrf; 358 struct sctp_ifa *sctp_ifap = NULL; 359 360 SCTP_IPI_ADDR_RLOCK(); 361 vrf = sctp_find_vrf(vrf_id); 362 if (vrf == NULL) { 363 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 364 goto out; 365 366 } 367 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 368 if (sctp_ifap == NULL) { 369 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 370 goto out; 371 } 372 if (sctp_ifap->ifn_p == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 374 goto out; 375 } 376 if (if_name) { 377 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 378 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 379 sctp_ifap->ifn_p->ifn_name, if_name); 380 goto out; 381 } 382 } else { 383 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 384 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 385 sctp_ifap->ifn_p->ifn_index, ifn_index); 386 goto out; 387 } 388 } 389 390 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 391 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 392 out: 393 SCTP_IPI_ADDR_RUNLOCK(); 394 } 395 396 /*- 397 * Add an ifa to an ifn. 398 * Register the interface as necessary. 399 * NOTE: ADDR write lock MUST be held. 400 */ 401 static void 402 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 403 { 404 int ifa_af; 405 406 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 407 sctp_ifap->ifn_p = sctp_ifnp; 408 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 409 /* update address counts */ 410 sctp_ifnp->ifa_count++; 411 ifa_af = sctp_ifap->address.sa.sa_family; 412 switch (ifa_af) { 413 #ifdef INET 414 case AF_INET: 415 sctp_ifnp->num_v4++; 416 break; 417 #endif 418 #ifdef INET6 419 case AF_INET6: 420 sctp_ifnp->num_v6++; 421 break; 422 #endif 423 default: 424 break; 425 } 426 if (sctp_ifnp->ifa_count == 1) { 427 /* register the new interface */ 428 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 429 sctp_ifnp->registered_af = ifa_af; 430 } 431 } 432 433 /*- 434 * Remove an ifa from its ifn. 435 * If no more addresses exist, remove the ifn too. Otherwise, re-register 436 * the interface based on the remaining address families left. 437 * NOTE: ADDR write lock MUST be held. 438 */ 439 static void 440 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 441 { 442 uint32_t ifn_index; 443 444 LIST_REMOVE(sctp_ifap, next_ifa); 445 if (sctp_ifap->ifn_p) { 446 /* update address counts */ 447 sctp_ifap->ifn_p->ifa_count--; 448 switch (sctp_ifap->address.sa.sa_family) { 449 #ifdef INET 450 case AF_INET: 451 sctp_ifap->ifn_p->num_v4--; 452 break; 453 #endif 454 #ifdef INET6 455 case AF_INET6: 456 sctp_ifap->ifn_p->num_v6--; 457 break; 458 #endif 459 default: 460 break; 461 } 462 463 ifn_index = sctp_ifap->ifn_p->ifn_index; 464 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 465 /* remove the ifn, possibly freeing it */ 466 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 467 } else { 468 /* re-register address family type, if needed */ 469 if ((sctp_ifap->ifn_p->num_v6 == 0) && 470 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 471 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6); 472 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET); 473 sctp_ifap->ifn_p->registered_af = AF_INET; 474 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 475 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 476 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET); 477 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6); 478 sctp_ifap->ifn_p->registered_af = AF_INET6; 479 } 480 /* free the ifn refcount */ 481 sctp_free_ifn(sctp_ifap->ifn_p); 482 } 483 sctp_ifap->ifn_p = NULL; 484 } 485 } 486 487 struct sctp_ifa * 488 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 489 uint32_t ifn_type, const char *if_name, void *ifa, 490 struct sockaddr *addr, uint32_t ifa_flags, 491 int dynamic_add) 492 { 493 struct sctp_vrf *vrf; 494 struct sctp_ifn *sctp_ifnp = NULL; 495 struct sctp_ifa *sctp_ifap = NULL; 496 struct sctp_ifalist *hash_addr_head; 497 struct sctp_ifnlist *hash_ifn_head; 498 uint32_t hash_of_addr; 499 int new_ifn_af = 0; 500 501 #ifdef SCTP_DEBUG 502 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 503 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 504 #endif 505 SCTP_IPI_ADDR_WLOCK(); 506 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 507 if (sctp_ifnp) { 508 vrf = sctp_ifnp->vrf; 509 } else { 510 vrf = sctp_find_vrf(vrf_id); 511 if (vrf == NULL) { 512 vrf = sctp_allocate_vrf(vrf_id); 513 if (vrf == NULL) { 514 SCTP_IPI_ADDR_WUNLOCK(); 515 return (NULL); 516 } 517 } 518 } 519 if (sctp_ifnp == NULL) { 520 /* 521 * build one and add it, can't hold lock until after malloc 522 * done though. 523 */ 524 SCTP_IPI_ADDR_WUNLOCK(); 525 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 526 sizeof(struct sctp_ifn), SCTP_M_IFN); 527 if (sctp_ifnp == NULL) { 528 #ifdef INVARIANTS 529 panic("No memory for IFN"); 530 #endif 531 return (NULL); 532 } 533 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 534 sctp_ifnp->ifn_index = ifn_index; 535 sctp_ifnp->ifn_p = ifn; 536 sctp_ifnp->ifn_type = ifn_type; 537 sctp_ifnp->refcount = 0; 538 sctp_ifnp->vrf = vrf; 539 atomic_add_int(&vrf->refcount, 1); 540 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 541 if (if_name != NULL) { 542 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 543 } else { 544 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 545 } 546 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 547 LIST_INIT(&sctp_ifnp->ifalist); 548 SCTP_IPI_ADDR_WLOCK(); 549 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 550 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 551 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 552 new_ifn_af = 1; 553 } 554 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 555 if (sctp_ifap) { 556 /* Hmm, it already exists? */ 557 if ((sctp_ifap->ifn_p) && 558 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 559 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 560 sctp_ifap->ifn_p->ifn_name, ifn_index, 561 sctp_ifap); 562 if (new_ifn_af) { 563 /* Remove the created one that we don't want */ 564 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 565 } 566 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 567 /* easy to solve, just switch back to active */ 568 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 569 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 570 sctp_ifap->ifn_p = sctp_ifnp; 571 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 572 } 573 exit_stage_left: 574 SCTP_IPI_ADDR_WUNLOCK(); 575 return (sctp_ifap); 576 } else { 577 if (sctp_ifap->ifn_p) { 578 /* 579 * The last IFN gets the address, remove the 580 * old one 581 */ 582 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 583 sctp_ifap, sctp_ifap->ifn_p->ifn_name, 584 sctp_ifap->ifn_p->ifn_index, if_name, 585 ifn_index); 586 /* remove the address from the old ifn */ 587 sctp_remove_ifa_from_ifn(sctp_ifap); 588 /* move the address over to the new ifn */ 589 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 590 goto exit_stage_left; 591 } else { 592 /* repair ifnp which was NULL ? */ 593 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 594 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 595 sctp_ifnp, sctp_ifap); 596 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 597 } 598 goto exit_stage_left; 599 } 600 } 601 SCTP_IPI_ADDR_WUNLOCK(); 602 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 603 if (sctp_ifap == NULL) { 604 #ifdef INVARIANTS 605 panic("No memory for IFA"); 606 #endif 607 return (NULL); 608 } 609 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 610 sctp_ifap->ifn_p = sctp_ifnp; 611 atomic_add_int(&sctp_ifnp->refcount, 1); 612 sctp_ifap->vrf_id = vrf_id; 613 sctp_ifap->ifa = ifa; 614 memcpy(&sctp_ifap->address, addr, addr->sa_len); 615 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 616 sctp_ifap->flags = ifa_flags; 617 /* Set scope */ 618 switch (sctp_ifap->address.sa.sa_family) { 619 #ifdef INET 620 case AF_INET: 621 { 622 struct sockaddr_in *sin; 623 624 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 625 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 626 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 627 sctp_ifap->src_is_loop = 1; 628 } 629 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 630 sctp_ifap->src_is_priv = 1; 631 } 632 sctp_ifnp->num_v4++; 633 if (new_ifn_af) 634 new_ifn_af = AF_INET; 635 break; 636 } 637 #endif 638 #ifdef INET6 639 case AF_INET6: 640 { 641 /* ok to use deprecated addresses? */ 642 struct sockaddr_in6 *sin6; 643 644 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 645 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 646 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 647 sctp_ifap->src_is_loop = 1; 648 } 649 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 650 sctp_ifap->src_is_priv = 1; 651 } 652 sctp_ifnp->num_v6++; 653 if (new_ifn_af) 654 new_ifn_af = AF_INET6; 655 break; 656 } 657 #endif 658 default: 659 new_ifn_af = 0; 660 break; 661 } 662 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 663 664 if ((sctp_ifap->src_is_priv == 0) && 665 (sctp_ifap->src_is_loop == 0)) { 666 sctp_ifap->src_is_glob = 1; 667 } 668 SCTP_IPI_ADDR_WLOCK(); 669 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 670 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 671 sctp_ifap->refcount = 1; 672 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 673 sctp_ifnp->ifa_count++; 674 vrf->total_ifa_count++; 675 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 676 if (new_ifn_af) { 677 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 678 sctp_ifnp->registered_af = new_ifn_af; 679 } 680 SCTP_IPI_ADDR_WUNLOCK(); 681 if (dynamic_add) { 682 /* 683 * Bump up the refcount so that when the timer completes it 684 * will drop back down. 685 */ 686 struct sctp_laddr *wi; 687 688 atomic_add_int(&sctp_ifap->refcount, 1); 689 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 690 if (wi == NULL) { 691 /* 692 * Gak, what can we do? We have lost an address 693 * change can you say HOSED? 694 */ 695 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 696 /* Opps, must decrement the count */ 697 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 698 if_name); 699 return (NULL); 700 } 701 SCTP_INCR_LADDR_COUNT(); 702 bzero(wi, sizeof(*wi)); 703 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 704 wi->ifa = sctp_ifap; 705 wi->action = SCTP_ADD_IP_ADDRESS; 706 707 SCTP_WQ_ADDR_LOCK(); 708 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 709 SCTP_WQ_ADDR_UNLOCK(); 710 711 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 712 (struct sctp_inpcb *)NULL, 713 (struct sctp_tcb *)NULL, 714 (struct sctp_nets *)NULL); 715 } else { 716 /* it's ready for use */ 717 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 718 } 719 return (sctp_ifap); 720 } 721 722 void 723 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 724 uint32_t ifn_index, const char *if_name) 725 { 726 struct sctp_vrf *vrf; 727 struct sctp_ifa *sctp_ifap = NULL; 728 729 SCTP_IPI_ADDR_WLOCK(); 730 vrf = sctp_find_vrf(vrf_id); 731 if (vrf == NULL) { 732 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 733 goto out_now; 734 } 735 #ifdef SCTP_DEBUG 736 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 737 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 738 #endif 739 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 740 if (sctp_ifap) { 741 /* Validate the delete */ 742 if (sctp_ifap->ifn_p) { 743 int valid = 0; 744 745 /*- 746 * The name has priority over the ifn_index 747 * if its given. We do this especially for 748 * panda who might recycle indexes fast. 749 */ 750 if (if_name) { 751 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 752 /* They match its a correct delete */ 753 valid = 1; 754 } 755 } 756 if (!valid) { 757 /* last ditch check ifn_index */ 758 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 759 valid = 1; 760 } 761 } 762 if (!valid) { 763 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 764 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 765 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 766 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 767 SCTP_IPI_ADDR_WUNLOCK(); 768 return; 769 } 770 } 771 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap); 772 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 773 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 774 vrf->total_ifa_count--; 775 LIST_REMOVE(sctp_ifap, next_bucket); 776 sctp_remove_ifa_from_ifn(sctp_ifap); 777 } 778 #ifdef SCTP_DEBUG 779 else { 780 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 781 ifn_index); 782 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 783 } 784 #endif 785 786 out_now: 787 SCTP_IPI_ADDR_WUNLOCK(); 788 if (sctp_ifap) { 789 struct sctp_laddr *wi; 790 791 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 792 if (wi == NULL) { 793 /* 794 * Gak, what can we do? We have lost an address 795 * change can you say HOSED? 796 */ 797 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 798 799 /* Oops, must decrement the count */ 800 sctp_free_ifa(sctp_ifap); 801 return; 802 } 803 SCTP_INCR_LADDR_COUNT(); 804 bzero(wi, sizeof(*wi)); 805 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 806 wi->ifa = sctp_ifap; 807 wi->action = SCTP_DEL_IP_ADDRESS; 808 SCTP_WQ_ADDR_LOCK(); 809 /* 810 * Should this really be a tailq? As it is we will process 811 * the newest first :-0 812 */ 813 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 814 SCTP_WQ_ADDR_UNLOCK(); 815 816 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 817 (struct sctp_inpcb *)NULL, 818 (struct sctp_tcb *)NULL, 819 (struct sctp_nets *)NULL); 820 } 821 return; 822 } 823 824 825 static struct sctp_tcb * 826 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 827 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 828 { 829 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 830 /* 831 * If we support the TCP model, then we must now dig through to see 832 * if we can find our endpoint in the list of tcp ep's. 833 */ 834 uint16_t lport, rport; 835 struct sctppcbhead *ephead; 836 struct sctp_inpcb *inp; 837 struct sctp_laddr *laddr; 838 struct sctp_tcb *stcb; 839 struct sctp_nets *net; 840 841 if ((to == NULL) || (from == NULL)) { 842 return (NULL); 843 } 844 switch (to->sa_family) { 845 #ifdef INET 846 case AF_INET: 847 if (from->sa_family == AF_INET) { 848 lport = ((struct sockaddr_in *)to)->sin_port; 849 rport = ((struct sockaddr_in *)from)->sin_port; 850 } else { 851 return (NULL); 852 } 853 break; 854 #endif 855 #ifdef INET6 856 case AF_INET6: 857 if (from->sa_family == AF_INET6) { 858 lport = ((struct sockaddr_in6 *)to)->sin6_port; 859 rport = ((struct sockaddr_in6 *)from)->sin6_port; 860 } else { 861 return (NULL); 862 } 863 break; 864 #endif 865 default: 866 return (NULL); 867 } 868 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 869 /* 870 * Ok now for each of the guys in this bucket we must look and see: 871 * - Does the remote port match. - Does there single association's 872 * addresses match this address (to). If so we update p_ep to point 873 * to this ep and return the tcb from it. 874 */ 875 LIST_FOREACH(inp, ephead, sctp_hash) { 876 SCTP_INP_RLOCK(inp); 877 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 878 SCTP_INP_RUNLOCK(inp); 879 continue; 880 } 881 if (lport != inp->sctp_lport) { 882 SCTP_INP_RUNLOCK(inp); 883 continue; 884 } 885 if (inp->def_vrf_id != vrf_id) { 886 SCTP_INP_RUNLOCK(inp); 887 continue; 888 } 889 /* check to see if the ep has one of the addresses */ 890 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 891 /* We are NOT bound all, so look further */ 892 int match = 0; 893 894 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 895 896 if (laddr->ifa == NULL) { 897 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 898 continue; 899 } 900 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 901 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 902 continue; 903 } 904 if (laddr->ifa->address.sa.sa_family == 905 to->sa_family) { 906 /* see if it matches */ 907 908 #ifdef INET 909 if (from->sa_family == AF_INET) { 910 struct sockaddr_in *intf_addr, 911 *sin; 912 913 intf_addr = &laddr->ifa->address.sin; 914 sin = (struct sockaddr_in *)to; 915 if (sin->sin_addr.s_addr == 916 intf_addr->sin_addr.s_addr) { 917 match = 1; 918 break; 919 } 920 } 921 #endif 922 #ifdef INET6 923 if (from->sa_family == AF_INET6) { 924 struct sockaddr_in6 *intf_addr6; 925 struct sockaddr_in6 *sin6; 926 927 sin6 = (struct sockaddr_in6 *) 928 to; 929 intf_addr6 = &laddr->ifa->address.sin6; 930 931 if (SCTP6_ARE_ADDR_EQUAL(sin6, 932 intf_addr6)) { 933 match = 1; 934 break; 935 } 936 } 937 #endif 938 } 939 } 940 if (match == 0) { 941 /* This endpoint does not have this address */ 942 SCTP_INP_RUNLOCK(inp); 943 continue; 944 } 945 } 946 /* 947 * Ok if we hit here the ep has the address, does it hold 948 * the tcb? 949 */ 950 951 stcb = LIST_FIRST(&inp->sctp_asoc_list); 952 if (stcb == NULL) { 953 SCTP_INP_RUNLOCK(inp); 954 continue; 955 } 956 SCTP_TCB_LOCK(stcb); 957 if (stcb->rport != rport) { 958 /* remote port does not match. */ 959 SCTP_TCB_UNLOCK(stcb); 960 SCTP_INP_RUNLOCK(inp); 961 continue; 962 } 963 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 964 SCTP_TCB_UNLOCK(stcb); 965 SCTP_INP_RUNLOCK(inp); 966 continue; 967 } 968 /* Does this TCB have a matching address? */ 969 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 970 971 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 972 /* not the same family, can't be a match */ 973 continue; 974 } 975 switch (from->sa_family) { 976 #ifdef INET 977 case AF_INET: 978 { 979 struct sockaddr_in *sin, *rsin; 980 981 sin = (struct sockaddr_in *)&net->ro._l_addr; 982 rsin = (struct sockaddr_in *)from; 983 if (sin->sin_addr.s_addr == 984 rsin->sin_addr.s_addr) { 985 /* found it */ 986 if (netp != NULL) { 987 *netp = net; 988 } 989 /* 990 * Update the endpoint 991 * pointer 992 */ 993 *inp_p = inp; 994 SCTP_INP_RUNLOCK(inp); 995 return (stcb); 996 } 997 break; 998 } 999 #endif 1000 #ifdef INET6 1001 case AF_INET6: 1002 { 1003 struct sockaddr_in6 *sin6, *rsin6; 1004 1005 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1006 rsin6 = (struct sockaddr_in6 *)from; 1007 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1008 rsin6)) { 1009 /* found it */ 1010 if (netp != NULL) { 1011 *netp = net; 1012 } 1013 /* 1014 * Update the endpoint 1015 * pointer 1016 */ 1017 *inp_p = inp; 1018 SCTP_INP_RUNLOCK(inp); 1019 return (stcb); 1020 } 1021 break; 1022 } 1023 #endif 1024 default: 1025 /* TSNH */ 1026 break; 1027 } 1028 } 1029 SCTP_TCB_UNLOCK(stcb); 1030 SCTP_INP_RUNLOCK(inp); 1031 } 1032 return (NULL); 1033 } 1034 1035 static int 1036 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1037 { 1038 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 1039 int ipv4_addr_legal, ipv6_addr_legal; 1040 struct sctp_vrf *vrf; 1041 struct sctp_ifn *sctp_ifn; 1042 struct sctp_ifa *sctp_ifa; 1043 1044 loopback_scope = stcb->asoc.loopback_scope; 1045 ipv4_local_scope = stcb->asoc.ipv4_local_scope; 1046 local_scope = stcb->asoc.local_scope; 1047 site_scope = stcb->asoc.site_scope; 1048 ipv4_addr_legal = ipv6_addr_legal = 0; 1049 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1050 ipv6_addr_legal = 1; 1051 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) { 1052 ipv4_addr_legal = 1; 1053 } 1054 } else { 1055 ipv4_addr_legal = 1; 1056 } 1057 1058 SCTP_IPI_ADDR_RLOCK(); 1059 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1060 if (vrf == NULL) { 1061 /* no vrf, no addresses */ 1062 SCTP_IPI_ADDR_RUNLOCK(); 1063 return (0); 1064 } 1065 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1066 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1067 if ((loopback_scope == 0) && 1068 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1069 continue; 1070 } 1071 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1072 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 1073 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 1074 /* 1075 * We allow pending addresses, where 1076 * we have sent an asconf-add to be 1077 * considered valid. 1078 */ 1079 continue; 1080 } 1081 switch (sctp_ifa->address.sa.sa_family) { 1082 #ifdef INET 1083 case AF_INET: 1084 if (ipv4_addr_legal) { 1085 struct sockaddr_in *sin, 1086 *rsin; 1087 1088 sin = &sctp_ifa->address.sin; 1089 rsin = (struct sockaddr_in *)to; 1090 if ((ipv4_local_scope == 0) && 1091 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1092 continue; 1093 } 1094 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1095 SCTP_IPI_ADDR_RUNLOCK(); 1096 return (1); 1097 } 1098 } 1099 break; 1100 #endif 1101 #ifdef INET6 1102 case AF_INET6: 1103 if (ipv6_addr_legal) { 1104 struct sockaddr_in6 *sin6, 1105 *rsin6; 1106 1107 sin6 = &sctp_ifa->address.sin6; 1108 rsin6 = (struct sockaddr_in6 *)to; 1109 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1110 if (local_scope == 0) 1111 continue; 1112 if (sin6->sin6_scope_id == 0) { 1113 if (sa6_recoverscope(sin6) != 0) 1114 continue; 1115 } 1116 } 1117 if ((site_scope == 0) && 1118 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1119 continue; 1120 } 1121 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1122 SCTP_IPI_ADDR_RUNLOCK(); 1123 return (1); 1124 } 1125 } 1126 break; 1127 #endif 1128 default: 1129 /* TSNH */ 1130 break; 1131 } 1132 } 1133 } 1134 } else { 1135 struct sctp_laddr *laddr; 1136 1137 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1138 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 1139 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 1140 /* 1141 * We allow pending addresses, where we have 1142 * sent an asconf-add to be considered 1143 * valid. 1144 */ 1145 continue; 1146 } 1147 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 1148 continue; 1149 } 1150 switch (to->sa_family) { 1151 #ifdef INET 1152 case AF_INET: 1153 { 1154 struct sockaddr_in *sin, *rsin; 1155 1156 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 1157 rsin = (struct sockaddr_in *)to; 1158 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1159 SCTP_IPI_ADDR_RUNLOCK(); 1160 return (1); 1161 } 1162 break; 1163 } 1164 #endif 1165 #ifdef INET6 1166 case AF_INET6: 1167 { 1168 struct sockaddr_in6 *sin6, *rsin6; 1169 1170 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1171 rsin6 = (struct sockaddr_in6 *)to; 1172 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1173 SCTP_IPI_ADDR_RUNLOCK(); 1174 return (1); 1175 } 1176 break; 1177 } 1178 1179 #endif 1180 default: 1181 /* TSNH */ 1182 break; 1183 } 1184 1185 } 1186 } 1187 SCTP_IPI_ADDR_RUNLOCK(); 1188 return (0); 1189 } 1190 1191 /* 1192 * rules for use 1193 * 1194 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1195 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1196 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1197 * NULL. 1198 */ 1199 1200 struct sctp_tcb * 1201 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1202 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1203 { 1204 struct sctpasochead *head; 1205 struct sctp_inpcb *inp; 1206 struct sctp_tcb *stcb = NULL; 1207 struct sctp_nets *net; 1208 uint16_t rport; 1209 1210 inp = *inp_p; 1211 if (remote->sa_family == AF_INET) { 1212 rport = (((struct sockaddr_in *)remote)->sin_port); 1213 } else if (remote->sa_family == AF_INET6) { 1214 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1215 } else { 1216 return (NULL); 1217 } 1218 if (locked_tcb) { 1219 /* 1220 * UN-lock so we can do proper locking here this occurs when 1221 * called from load_addresses_from_init. 1222 */ 1223 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1224 SCTP_TCB_UNLOCK(locked_tcb); 1225 } 1226 SCTP_INP_INFO_RLOCK(); 1227 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1228 /*- 1229 * Now either this guy is our listener or it's the 1230 * connector. If it is the one that issued the connect, then 1231 * it's only chance is to be the first TCB in the list. If 1232 * it is the acceptor, then do the special_lookup to hash 1233 * and find the real inp. 1234 */ 1235 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1236 /* to is peer addr, from is my addr */ 1237 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1238 netp, inp->def_vrf_id); 1239 if ((stcb != NULL) && (locked_tcb == NULL)) { 1240 /* we have a locked tcb, lower refcount */ 1241 SCTP_INP_DECR_REF(inp); 1242 } 1243 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1244 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1245 SCTP_TCB_LOCK(locked_tcb); 1246 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1247 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1248 } 1249 SCTP_INP_INFO_RUNLOCK(); 1250 return (stcb); 1251 } else { 1252 SCTP_INP_WLOCK(inp); 1253 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1254 goto null_return; 1255 } 1256 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1257 if (stcb == NULL) { 1258 goto null_return; 1259 } 1260 SCTP_TCB_LOCK(stcb); 1261 1262 if (stcb->rport != rport) { 1263 /* remote port does not match. */ 1264 SCTP_TCB_UNLOCK(stcb); 1265 goto null_return; 1266 } 1267 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1268 SCTP_TCB_UNLOCK(stcb); 1269 goto null_return; 1270 } 1271 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1272 SCTP_TCB_UNLOCK(stcb); 1273 goto null_return; 1274 } 1275 /* now look at the list of remote addresses */ 1276 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1277 #ifdef INVARIANTS 1278 if (net == (TAILQ_NEXT(net, sctp_next))) { 1279 panic("Corrupt net list"); 1280 } 1281 #endif 1282 if (net->ro._l_addr.sa.sa_family != 1283 remote->sa_family) { 1284 /* not the same family */ 1285 continue; 1286 } 1287 switch (remote->sa_family) { 1288 #ifdef INET 1289 case AF_INET: 1290 { 1291 struct sockaddr_in *sin, 1292 *rsin; 1293 1294 sin = (struct sockaddr_in *) 1295 &net->ro._l_addr; 1296 rsin = (struct sockaddr_in *)remote; 1297 if (sin->sin_addr.s_addr == 1298 rsin->sin_addr.s_addr) { 1299 /* found it */ 1300 if (netp != NULL) { 1301 *netp = net; 1302 } 1303 if (locked_tcb == NULL) { 1304 SCTP_INP_DECR_REF(inp); 1305 } else if (locked_tcb != stcb) { 1306 SCTP_TCB_LOCK(locked_tcb); 1307 } 1308 if (locked_tcb) { 1309 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1310 } 1311 SCTP_INP_WUNLOCK(inp); 1312 SCTP_INP_INFO_RUNLOCK(); 1313 return (stcb); 1314 } 1315 break; 1316 } 1317 #endif 1318 #ifdef INET6 1319 case AF_INET6: 1320 { 1321 struct sockaddr_in6 *sin6, 1322 *rsin6; 1323 1324 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1325 rsin6 = (struct sockaddr_in6 *)remote; 1326 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1327 rsin6)) { 1328 /* found it */ 1329 if (netp != NULL) { 1330 *netp = net; 1331 } 1332 if (locked_tcb == NULL) { 1333 SCTP_INP_DECR_REF(inp); 1334 } else if (locked_tcb != stcb) { 1335 SCTP_TCB_LOCK(locked_tcb); 1336 } 1337 if (locked_tcb) { 1338 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1339 } 1340 SCTP_INP_WUNLOCK(inp); 1341 SCTP_INP_INFO_RUNLOCK(); 1342 return (stcb); 1343 } 1344 break; 1345 } 1346 #endif 1347 default: 1348 /* TSNH */ 1349 break; 1350 } 1351 } 1352 SCTP_TCB_UNLOCK(stcb); 1353 } 1354 } else { 1355 SCTP_INP_WLOCK(inp); 1356 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1357 goto null_return; 1358 } 1359 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1360 inp->sctp_hashmark)]; 1361 if (head == NULL) { 1362 goto null_return; 1363 } 1364 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1365 if (stcb->rport != rport) { 1366 /* remote port does not match */ 1367 continue; 1368 } 1369 SCTP_TCB_LOCK(stcb); 1370 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1371 SCTP_TCB_UNLOCK(stcb); 1372 continue; 1373 } 1374 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1375 SCTP_TCB_UNLOCK(stcb); 1376 continue; 1377 } 1378 /* now look at the list of remote addresses */ 1379 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1380 #ifdef INVARIANTS 1381 if (net == (TAILQ_NEXT(net, sctp_next))) { 1382 panic("Corrupt net list"); 1383 } 1384 #endif 1385 if (net->ro._l_addr.sa.sa_family != 1386 remote->sa_family) { 1387 /* not the same family */ 1388 continue; 1389 } 1390 switch (remote->sa_family) { 1391 #ifdef INET 1392 case AF_INET: 1393 { 1394 struct sockaddr_in *sin, 1395 *rsin; 1396 1397 sin = (struct sockaddr_in *) 1398 &net->ro._l_addr; 1399 rsin = (struct sockaddr_in *)remote; 1400 if (sin->sin_addr.s_addr == 1401 rsin->sin_addr.s_addr) { 1402 /* found it */ 1403 if (netp != NULL) { 1404 *netp = net; 1405 } 1406 if (locked_tcb == NULL) { 1407 SCTP_INP_DECR_REF(inp); 1408 } else if (locked_tcb != stcb) { 1409 SCTP_TCB_LOCK(locked_tcb); 1410 } 1411 if (locked_tcb) { 1412 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1413 } 1414 SCTP_INP_WUNLOCK(inp); 1415 SCTP_INP_INFO_RUNLOCK(); 1416 return (stcb); 1417 } 1418 break; 1419 } 1420 #endif 1421 #ifdef INET6 1422 case AF_INET6: 1423 { 1424 struct sockaddr_in6 *sin6, 1425 *rsin6; 1426 1427 sin6 = (struct sockaddr_in6 *) 1428 &net->ro._l_addr; 1429 rsin6 = (struct sockaddr_in6 *)remote; 1430 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1431 rsin6)) { 1432 /* found it */ 1433 if (netp != NULL) { 1434 *netp = net; 1435 } 1436 if (locked_tcb == NULL) { 1437 SCTP_INP_DECR_REF(inp); 1438 } else if (locked_tcb != stcb) { 1439 SCTP_TCB_LOCK(locked_tcb); 1440 } 1441 if (locked_tcb) { 1442 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1443 } 1444 SCTP_INP_WUNLOCK(inp); 1445 SCTP_INP_INFO_RUNLOCK(); 1446 return (stcb); 1447 } 1448 break; 1449 } 1450 #endif 1451 default: 1452 /* TSNH */ 1453 break; 1454 } 1455 } 1456 SCTP_TCB_UNLOCK(stcb); 1457 } 1458 } 1459 null_return: 1460 /* clean up for returning null */ 1461 if (locked_tcb) { 1462 SCTP_TCB_LOCK(locked_tcb); 1463 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1464 } 1465 SCTP_INP_WUNLOCK(inp); 1466 SCTP_INP_INFO_RUNLOCK(); 1467 /* not found */ 1468 return (NULL); 1469 } 1470 1471 /* 1472 * Find an association for a specific endpoint using the association id given 1473 * out in the COMM_UP notification 1474 */ 1475 1476 struct sctp_tcb * 1477 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1478 { 1479 /* 1480 * Use my the assoc_id to find a endpoint 1481 */ 1482 struct sctpasochead *head; 1483 struct sctp_tcb *stcb; 1484 uint32_t id; 1485 1486 if (inp == NULL) { 1487 SCTP_PRINTF("TSNH ep_associd\n"); 1488 return (NULL); 1489 } 1490 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1491 SCTP_PRINTF("TSNH ep_associd0\n"); 1492 return (NULL); 1493 } 1494 id = (uint32_t) asoc_id; 1495 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1496 if (head == NULL) { 1497 /* invalid id TSNH */ 1498 SCTP_PRINTF("TSNH ep_associd1\n"); 1499 return (NULL); 1500 } 1501 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1502 if (stcb->asoc.assoc_id == id) { 1503 if (inp != stcb->sctp_ep) { 1504 /* 1505 * some other guy has the same id active (id 1506 * collision ??). 1507 */ 1508 SCTP_PRINTF("TSNH ep_associd2\n"); 1509 continue; 1510 } 1511 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1512 continue; 1513 } 1514 if (want_lock) { 1515 SCTP_TCB_LOCK(stcb); 1516 } 1517 return (stcb); 1518 } 1519 } 1520 return (NULL); 1521 } 1522 1523 1524 struct sctp_tcb * 1525 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1526 { 1527 struct sctp_tcb *stcb; 1528 1529 SCTP_INP_RLOCK(inp); 1530 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1531 SCTP_INP_RUNLOCK(inp); 1532 return (stcb); 1533 } 1534 1535 1536 static struct sctp_inpcb * 1537 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1538 uint16_t lport, uint32_t vrf_id) 1539 { 1540 struct sctp_inpcb *inp; 1541 struct sctp_laddr *laddr; 1542 1543 #ifdef INET 1544 struct sockaddr_in *sin; 1545 1546 #endif 1547 #ifdef INET6 1548 struct sockaddr_in6 *sin6; 1549 struct sockaddr_in6 *intf_addr6; 1550 1551 #endif 1552 1553 int fnd; 1554 1555 /* 1556 * Endpoint probe expects that the INP_INFO is locked. 1557 */ 1558 #ifdef INET 1559 sin = NULL; 1560 #endif 1561 #ifdef INET6 1562 sin6 = NULL; 1563 #endif 1564 switch (nam->sa_family) { 1565 #ifdef INET 1566 case AF_INET: 1567 sin = (struct sockaddr_in *)nam; 1568 break; 1569 #endif 1570 #ifdef INET6 1571 case AF_INET6: 1572 sin6 = (struct sockaddr_in6 *)nam; 1573 break; 1574 #endif 1575 default: 1576 /* unsupported family */ 1577 return (NULL); 1578 } 1579 1580 if (head == NULL) 1581 return (NULL); 1582 1583 LIST_FOREACH(inp, head, sctp_hash) { 1584 SCTP_INP_RLOCK(inp); 1585 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1586 SCTP_INP_RUNLOCK(inp); 1587 continue; 1588 } 1589 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1590 (inp->sctp_lport == lport)) { 1591 /* got it */ 1592 #ifdef INET 1593 if ((nam->sa_family == AF_INET) && 1594 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1595 SCTP_IPV6_V6ONLY(inp)) { 1596 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1597 SCTP_INP_RUNLOCK(inp); 1598 continue; 1599 } 1600 #endif 1601 #ifdef INET6 1602 /* A V6 address and the endpoint is NOT bound V6 */ 1603 if (nam->sa_family == AF_INET6 && 1604 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1605 SCTP_INP_RUNLOCK(inp); 1606 continue; 1607 } 1608 #endif 1609 /* does a VRF id match? */ 1610 fnd = 0; 1611 if (inp->def_vrf_id == vrf_id) 1612 fnd = 1; 1613 1614 SCTP_INP_RUNLOCK(inp); 1615 if (!fnd) 1616 continue; 1617 return (inp); 1618 } 1619 SCTP_INP_RUNLOCK(inp); 1620 } 1621 switch (nam->sa_family) { 1622 #ifdef INET 1623 case AF_INET: 1624 if (sin->sin_addr.s_addr == INADDR_ANY) { 1625 /* Can't hunt for one that has no address specified */ 1626 return (NULL); 1627 } 1628 break; 1629 #endif 1630 #ifdef INET6 1631 case AF_INET6: 1632 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1633 /* Can't hunt for one that has no address specified */ 1634 return (NULL); 1635 } 1636 break; 1637 #endif 1638 default: 1639 break; 1640 } 1641 /* 1642 * ok, not bound to all so see if we can find a EP bound to this 1643 * address. 1644 */ 1645 LIST_FOREACH(inp, head, sctp_hash) { 1646 SCTP_INP_RLOCK(inp); 1647 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1648 SCTP_INP_RUNLOCK(inp); 1649 continue; 1650 } 1651 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1652 SCTP_INP_RUNLOCK(inp); 1653 continue; 1654 } 1655 /* 1656 * Ok this could be a likely candidate, look at all of its 1657 * addresses 1658 */ 1659 if (inp->sctp_lport != lport) { 1660 SCTP_INP_RUNLOCK(inp); 1661 continue; 1662 } 1663 /* does a VRF id match? */ 1664 fnd = 0; 1665 if (inp->def_vrf_id == vrf_id) 1666 fnd = 1; 1667 1668 if (!fnd) { 1669 SCTP_INP_RUNLOCK(inp); 1670 continue; 1671 } 1672 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1673 if (laddr->ifa == NULL) { 1674 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1675 __FUNCTION__); 1676 continue; 1677 } 1678 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1679 laddr->ifa); 1680 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1681 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1682 continue; 1683 } 1684 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1685 /* possible, see if it matches */ 1686 switch (nam->sa_family) { 1687 #ifdef INET 1688 case AF_INET: 1689 if (sin->sin_addr.s_addr == 1690 laddr->ifa->address.sin.sin_addr.s_addr) { 1691 SCTP_INP_RUNLOCK(inp); 1692 return (inp); 1693 } 1694 break; 1695 #endif 1696 #ifdef INET6 1697 case AF_INET6: 1698 intf_addr6 = &laddr->ifa->address.sin6; 1699 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1700 intf_addr6)) { 1701 SCTP_INP_RUNLOCK(inp); 1702 return (inp); 1703 } 1704 break; 1705 #endif 1706 } 1707 } 1708 } 1709 SCTP_INP_RUNLOCK(inp); 1710 } 1711 return (NULL); 1712 } 1713 1714 1715 static struct sctp_inpcb * 1716 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1717 { 1718 struct sctppcbhead *head; 1719 struct sctp_inpcb *t_inp; 1720 int fnd; 1721 1722 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1723 SCTP_BASE_INFO(hashmark))]; 1724 LIST_FOREACH(t_inp, head, sctp_hash) { 1725 if (t_inp->sctp_lport != lport) { 1726 continue; 1727 } 1728 /* is it in the VRF in question */ 1729 fnd = 0; 1730 if (t_inp->def_vrf_id == vrf_id) 1731 fnd = 1; 1732 if (!fnd) 1733 continue; 1734 1735 /* This one is in use. */ 1736 /* check the v6/v4 binding issue */ 1737 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1738 SCTP_IPV6_V6ONLY(t_inp)) { 1739 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1740 /* collision in V6 space */ 1741 return (t_inp); 1742 } else { 1743 /* inp is BOUND_V4 no conflict */ 1744 continue; 1745 } 1746 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1747 /* t_inp is bound v4 and v6, conflict always */ 1748 return (t_inp); 1749 } else { 1750 /* t_inp is bound only V4 */ 1751 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1752 SCTP_IPV6_V6ONLY(inp)) { 1753 /* no conflict */ 1754 continue; 1755 } 1756 /* else fall through to conflict */ 1757 } 1758 return (t_inp); 1759 } 1760 return (NULL); 1761 } 1762 1763 1764 int 1765 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1766 { 1767 /* For 1-2-1 with port reuse */ 1768 struct sctppcbhead *head; 1769 struct sctp_inpcb *tinp; 1770 1771 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1772 /* only works with port reuse on */ 1773 return (-1); 1774 } 1775 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1776 return (0); 1777 } 1778 SCTP_INP_RUNLOCK(inp); 1779 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1780 SCTP_BASE_INFO(hashmark))]; 1781 /* Kick out all non-listeners to the TCP hash */ 1782 LIST_FOREACH(tinp, head, sctp_hash) { 1783 if (tinp->sctp_lport != inp->sctp_lport) { 1784 continue; 1785 } 1786 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1787 continue; 1788 } 1789 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1790 continue; 1791 } 1792 if (tinp->sctp_socket->so_qlimit) { 1793 continue; 1794 } 1795 SCTP_INP_WLOCK(tinp); 1796 LIST_REMOVE(tinp, sctp_hash); 1797 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1798 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1799 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1800 SCTP_INP_WUNLOCK(tinp); 1801 } 1802 SCTP_INP_WLOCK(inp); 1803 /* Pull from where he was */ 1804 LIST_REMOVE(inp, sctp_hash); 1805 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1806 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1807 LIST_INSERT_HEAD(head, inp, sctp_hash); 1808 SCTP_INP_WUNLOCK(inp); 1809 SCTP_INP_RLOCK(inp); 1810 return (0); 1811 } 1812 1813 1814 struct sctp_inpcb * 1815 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1816 uint32_t vrf_id) 1817 { 1818 /* 1819 * First we check the hash table to see if someone has this port 1820 * bound with just the port. 1821 */ 1822 struct sctp_inpcb *inp; 1823 struct sctppcbhead *head; 1824 int lport; 1825 unsigned int i; 1826 1827 #ifdef INET 1828 struct sockaddr_in *sin; 1829 1830 #endif 1831 #ifdef INET6 1832 struct sockaddr_in6 *sin6; 1833 1834 #endif 1835 1836 switch (nam->sa_family) { 1837 #ifdef INET 1838 case AF_INET: 1839 sin = (struct sockaddr_in *)nam; 1840 lport = ((struct sockaddr_in *)nam)->sin_port; 1841 break; 1842 #endif 1843 #ifdef INET6 1844 case AF_INET6: 1845 sin6 = (struct sockaddr_in6 *)nam; 1846 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1847 break; 1848 #endif 1849 default: 1850 return (NULL); 1851 } 1852 /* 1853 * I could cheat here and just cast to one of the types but we will 1854 * do it right. It also provides the check against an Unsupported 1855 * type too. 1856 */ 1857 /* Find the head of the ALLADDR chain */ 1858 if (have_lock == 0) { 1859 SCTP_INP_INFO_RLOCK(); 1860 } 1861 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1862 SCTP_BASE_INFO(hashmark))]; 1863 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1864 1865 /* 1866 * If the TCP model exists it could be that the main listening 1867 * endpoint is gone but there still exists a connected socket for 1868 * this guy. If so we can return the first one that we find. This 1869 * may NOT be the correct one so the caller should be wary on the 1870 * returned INP. Currently the only caller that sets find_tcp_pool 1871 * is in bindx where we are verifying that a user CAN bind the 1872 * address. He either has bound it already, or someone else has, or 1873 * its open to bind, so this is good enough. 1874 */ 1875 if (inp == NULL && find_tcp_pool) { 1876 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1877 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1878 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1879 if (inp) { 1880 break; 1881 } 1882 } 1883 } 1884 if (inp) { 1885 SCTP_INP_INCR_REF(inp); 1886 } 1887 if (have_lock == 0) { 1888 SCTP_INP_INFO_RUNLOCK(); 1889 } 1890 return (inp); 1891 } 1892 1893 /* 1894 * Find an association for an endpoint with the pointer to whom you want to 1895 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1896 * need to change the *to to some other struct like a mbuf... 1897 */ 1898 struct sctp_tcb * 1899 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1900 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1901 uint32_t vrf_id) 1902 { 1903 struct sctp_inpcb *inp = NULL; 1904 struct sctp_tcb *retval; 1905 1906 SCTP_INP_INFO_RLOCK(); 1907 if (find_tcp_pool) { 1908 if (inp_p != NULL) { 1909 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1910 vrf_id); 1911 } else { 1912 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1913 vrf_id); 1914 } 1915 if (retval != NULL) { 1916 SCTP_INP_INFO_RUNLOCK(); 1917 return (retval); 1918 } 1919 } 1920 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1921 if (inp_p != NULL) { 1922 *inp_p = inp; 1923 } 1924 SCTP_INP_INFO_RUNLOCK(); 1925 1926 if (inp == NULL) { 1927 return (NULL); 1928 } 1929 /* 1930 * ok, we have an endpoint, now lets find the assoc for it (if any) 1931 * we now place the source address or from in the to of the find 1932 * endpoint call. Since in reality this chain is used from the 1933 * inbound packet side. 1934 */ 1935 if (inp_p != NULL) { 1936 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1937 NULL); 1938 } else { 1939 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1940 NULL); 1941 } 1942 return retval; 1943 } 1944 1945 1946 /* 1947 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1948 * find all addresses that the sender has specified in any address list. Each 1949 * address will be used to lookup the TCB and see if one exits. 1950 */ 1951 static struct sctp_tcb * 1952 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1953 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1954 struct sockaddr *dest) 1955 { 1956 struct sctp_paramhdr *phdr, parm_buf; 1957 struct sctp_tcb *retval; 1958 uint32_t ptype, plen; 1959 1960 #ifdef INET 1961 struct sockaddr_in sin4; 1962 1963 #endif 1964 #ifdef INET6 1965 struct sockaddr_in6 sin6; 1966 1967 #endif 1968 1969 #ifdef INET 1970 memset(&sin4, 0, sizeof(sin4)); 1971 sin4.sin_len = sizeof(sin4); 1972 sin4.sin_family = AF_INET; 1973 sin4.sin_port = sh->src_port; 1974 #endif 1975 #ifdef INET6 1976 memset(&sin6, 0, sizeof(sin6)); 1977 sin6.sin6_len = sizeof(sin6); 1978 sin6.sin6_family = AF_INET6; 1979 sin6.sin6_port = sh->src_port; 1980 #endif 1981 1982 retval = NULL; 1983 offset += sizeof(struct sctp_init_chunk); 1984 1985 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1986 while (phdr != NULL) { 1987 /* now we must see if we want the parameter */ 1988 ptype = ntohs(phdr->param_type); 1989 plen = ntohs(phdr->param_length); 1990 if (plen == 0) { 1991 break; 1992 } 1993 #ifdef INET 1994 if (ptype == SCTP_IPV4_ADDRESS && 1995 plen == sizeof(struct sctp_ipv4addr_param)) { 1996 /* Get the rest of the address */ 1997 struct sctp_ipv4addr_param ip4_parm, *p4; 1998 1999 phdr = sctp_get_next_param(m, offset, 2000 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2001 if (phdr == NULL) { 2002 return (NULL); 2003 } 2004 p4 = (struct sctp_ipv4addr_param *)phdr; 2005 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2006 /* look it up */ 2007 retval = sctp_findassociation_ep_addr(inp_p, 2008 (struct sockaddr *)&sin4, netp, dest, NULL); 2009 if (retval != NULL) { 2010 return (retval); 2011 } 2012 } 2013 #endif 2014 #ifdef INET6 2015 if (ptype == SCTP_IPV6_ADDRESS && 2016 plen == sizeof(struct sctp_ipv6addr_param)) { 2017 /* Get the rest of the address */ 2018 struct sctp_ipv6addr_param ip6_parm, *p6; 2019 2020 phdr = sctp_get_next_param(m, offset, 2021 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2022 if (phdr == NULL) { 2023 return (NULL); 2024 } 2025 p6 = (struct sctp_ipv6addr_param *)phdr; 2026 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2027 /* look it up */ 2028 retval = sctp_findassociation_ep_addr(inp_p, 2029 (struct sockaddr *)&sin6, netp, dest, NULL); 2030 if (retval != NULL) { 2031 return (retval); 2032 } 2033 } 2034 #endif 2035 offset += SCTP_SIZE32(plen); 2036 phdr = sctp_get_next_param(m, offset, &parm_buf, 2037 sizeof(parm_buf)); 2038 } 2039 return (NULL); 2040 } 2041 2042 static struct sctp_tcb * 2043 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2044 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2045 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2046 { 2047 /* 2048 * Use my vtag to hash. If we find it we then verify the source addr 2049 * is in the assoc. If all goes well we save a bit on rec of a 2050 * packet. 2051 */ 2052 struct sctpasochead *head; 2053 struct sctp_nets *net; 2054 struct sctp_tcb *stcb; 2055 2056 *netp = NULL; 2057 *inp_p = NULL; 2058 SCTP_INP_INFO_RLOCK(); 2059 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2060 SCTP_BASE_INFO(hashasocmark))]; 2061 if (head == NULL) { 2062 /* invalid vtag */ 2063 SCTP_INP_INFO_RUNLOCK(); 2064 return (NULL); 2065 } 2066 LIST_FOREACH(stcb, head, sctp_asocs) { 2067 SCTP_INP_RLOCK(stcb->sctp_ep); 2068 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2069 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2070 continue; 2071 } 2072 SCTP_TCB_LOCK(stcb); 2073 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2074 if (stcb->asoc.my_vtag == vtag) { 2075 /* candidate */ 2076 if (stcb->rport != rport) { 2077 SCTP_TCB_UNLOCK(stcb); 2078 continue; 2079 } 2080 if (stcb->sctp_ep->sctp_lport != lport) { 2081 SCTP_TCB_UNLOCK(stcb); 2082 continue; 2083 } 2084 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2085 SCTP_TCB_UNLOCK(stcb); 2086 continue; 2087 } 2088 /* RRS:Need toaddr check here */ 2089 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2090 /* Endpoint does not own this address */ 2091 SCTP_TCB_UNLOCK(stcb); 2092 continue; 2093 } 2094 if (remote_tag) { 2095 /* 2096 * If we have both vtags that's all we match 2097 * on 2098 */ 2099 if (stcb->asoc.peer_vtag == remote_tag) { 2100 /* 2101 * If both tags match we consider it 2102 * conclusive and check NO 2103 * source/destination addresses 2104 */ 2105 goto conclusive; 2106 } 2107 } 2108 if (skip_src_check) { 2109 conclusive: 2110 if (from) { 2111 net = sctp_findnet(stcb, from); 2112 } else { 2113 *netp = NULL; /* unknown */ 2114 } 2115 if (inp_p) 2116 *inp_p = stcb->sctp_ep; 2117 SCTP_INP_INFO_RUNLOCK(); 2118 return (stcb); 2119 } 2120 net = sctp_findnet(stcb, from); 2121 if (net) { 2122 /* yep its him. */ 2123 *netp = net; 2124 SCTP_STAT_INCR(sctps_vtagexpress); 2125 *inp_p = stcb->sctp_ep; 2126 SCTP_INP_INFO_RUNLOCK(); 2127 return (stcb); 2128 } else { 2129 /* 2130 * not him, this should only happen in rare 2131 * cases so I peg it. 2132 */ 2133 SCTP_STAT_INCR(sctps_vtagbogus); 2134 } 2135 } 2136 SCTP_TCB_UNLOCK(stcb); 2137 } 2138 SCTP_INP_INFO_RUNLOCK(); 2139 return (NULL); 2140 } 2141 2142 /* 2143 * Find an association with the pointer to the inbound IP packet. This can be 2144 * a IPv4 or IPv6 packet. 2145 */ 2146 struct sctp_tcb * 2147 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 2148 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2149 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2150 { 2151 int find_tcp_pool; 2152 struct ip *iph; 2153 struct sctp_tcb *retval; 2154 struct sockaddr_storage to_store, from_store; 2155 struct sockaddr *to = (struct sockaddr *)&to_store; 2156 struct sockaddr *from = (struct sockaddr *)&from_store; 2157 struct sctp_inpcb *inp; 2158 2159 iph = mtod(m, struct ip *); 2160 switch (iph->ip_v) { 2161 #ifdef INET 2162 case IPVERSION: 2163 { 2164 /* its IPv4 */ 2165 struct sockaddr_in *from4; 2166 2167 from4 = (struct sockaddr_in *)&from_store; 2168 bzero(from4, sizeof(*from4)); 2169 from4->sin_family = AF_INET; 2170 from4->sin_len = sizeof(struct sockaddr_in); 2171 from4->sin_addr.s_addr = iph->ip_src.s_addr; 2172 from4->sin_port = sh->src_port; 2173 break; 2174 } 2175 #endif 2176 #ifdef INET6 2177 case IPV6_VERSION >> 4: 2178 { 2179 /* its IPv6 */ 2180 struct ip6_hdr *ip6; 2181 struct sockaddr_in6 *from6; 2182 2183 ip6 = mtod(m, struct ip6_hdr *); 2184 from6 = (struct sockaddr_in6 *)&from_store; 2185 bzero(from6, sizeof(*from6)); 2186 from6->sin6_family = AF_INET6; 2187 from6->sin6_len = sizeof(struct sockaddr_in6); 2188 from6->sin6_addr = ip6->ip6_src; 2189 from6->sin6_port = sh->src_port; 2190 /* Get the scopes in properly to the sin6 addr's */ 2191 /* we probably don't need these operations */ 2192 (void)sa6_recoverscope(from6); 2193 sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone)); 2194 break; 2195 } 2196 #endif 2197 default: 2198 /* Currently not supported. */ 2199 return (NULL); 2200 } 2201 2202 2203 switch (iph->ip_v) { 2204 #ifdef INET 2205 case IPVERSION: 2206 { 2207 /* its IPv4 */ 2208 struct sockaddr_in *to4; 2209 2210 to4 = (struct sockaddr_in *)&to_store; 2211 bzero(to4, sizeof(*to4)); 2212 to4->sin_family = AF_INET; 2213 to4->sin_len = sizeof(struct sockaddr_in); 2214 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 2215 to4->sin_port = sh->dest_port; 2216 break; 2217 } 2218 #endif 2219 #ifdef INET6 2220 case IPV6_VERSION >> 4: 2221 { 2222 /* its IPv6 */ 2223 struct ip6_hdr *ip6; 2224 struct sockaddr_in6 *to6; 2225 2226 ip6 = mtod(m, struct ip6_hdr *); 2227 to6 = (struct sockaddr_in6 *)&to_store; 2228 bzero(to6, sizeof(*to6)); 2229 to6->sin6_family = AF_INET6; 2230 to6->sin6_len = sizeof(struct sockaddr_in6); 2231 to6->sin6_addr = ip6->ip6_dst; 2232 to6->sin6_port = sh->dest_port; 2233 /* Get the scopes in properly to the sin6 addr's */ 2234 /* we probably don't need these operations */ 2235 (void)sa6_recoverscope(to6); 2236 sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone)); 2237 break; 2238 } 2239 #endif 2240 default: 2241 /* TSNH */ 2242 break; 2243 } 2244 if (sh->v_tag) { 2245 /* we only go down this path if vtag is non-zero */ 2246 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag), 2247 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2248 if (retval) { 2249 return (retval); 2250 } 2251 } 2252 find_tcp_pool = 0; 2253 if ((ch->chunk_type != SCTP_INITIATION) && 2254 (ch->chunk_type != SCTP_INITIATION_ACK) && 2255 (ch->chunk_type != SCTP_COOKIE_ACK) && 2256 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2257 /* Other chunk types go to the tcp pool. */ 2258 find_tcp_pool = 1; 2259 } 2260 if (inp_p) { 2261 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 2262 find_tcp_pool, vrf_id); 2263 inp = *inp_p; 2264 } else { 2265 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 2266 find_tcp_pool, vrf_id); 2267 } 2268 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2269 if (retval == NULL && inp) { 2270 /* Found a EP but not this address */ 2271 if ((ch->chunk_type == SCTP_INITIATION) || 2272 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2273 /*- 2274 * special hook, we do NOT return linp or an 2275 * association that is linked to an existing 2276 * association that is under the TCP pool (i.e. no 2277 * listener exists). The endpoint finding routine 2278 * will always find a listener before examining the 2279 * TCP pool. 2280 */ 2281 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2282 if (inp_p) { 2283 *inp_p = NULL; 2284 } 2285 return (NULL); 2286 } 2287 retval = sctp_findassociation_special_addr(m, iphlen, 2288 offset, sh, &inp, netp, to); 2289 if (inp_p != NULL) { 2290 *inp_p = inp; 2291 } 2292 } 2293 } 2294 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2295 return (retval); 2296 } 2297 2298 /* 2299 * lookup an association by an ASCONF lookup address. 2300 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2301 */ 2302 struct sctp_tcb * 2303 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 2304 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2305 { 2306 struct sctp_tcb *stcb; 2307 struct sockaddr_storage local_store, remote_store; 2308 struct sockaddr *to; 2309 struct ip *iph; 2310 struct sctp_paramhdr parm_buf, *phdr; 2311 int ptype; 2312 int zero_address = 0; 2313 2314 #ifdef INET 2315 struct sockaddr_in *sin; 2316 2317 #endif 2318 #ifdef INET6 2319 struct ip6_hdr *ip6; 2320 struct sockaddr_in6 *sin6; 2321 2322 #endif 2323 2324 memset(&local_store, 0, sizeof(local_store)); 2325 memset(&remote_store, 0, sizeof(remote_store)); 2326 to = (struct sockaddr *)&local_store; 2327 /* First get the destination address setup too. */ 2328 iph = mtod(m, struct ip *); 2329 switch (iph->ip_v) { 2330 #ifdef INET 2331 case IPVERSION: 2332 /* its IPv4 */ 2333 sin = (struct sockaddr_in *)&local_store; 2334 sin->sin_family = AF_INET; 2335 sin->sin_len = sizeof(*sin); 2336 sin->sin_port = sh->dest_port; 2337 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 2338 break; 2339 #endif 2340 #ifdef INET6 2341 case IPV6_VERSION >> 4: 2342 /* its IPv6 */ 2343 ip6 = mtod(m, struct ip6_hdr *); 2344 sin6 = (struct sockaddr_in6 *)&local_store; 2345 sin6->sin6_family = AF_INET6; 2346 sin6->sin6_len = sizeof(*sin6); 2347 sin6->sin6_port = sh->dest_port; 2348 sin6->sin6_addr = ip6->ip6_dst; 2349 break; 2350 #endif 2351 default: 2352 return NULL; 2353 } 2354 2355 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2356 &parm_buf, sizeof(struct sctp_paramhdr)); 2357 if (phdr == NULL) { 2358 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2359 __FUNCTION__); 2360 return NULL; 2361 } 2362 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2363 /* get the correlation address */ 2364 switch (ptype) { 2365 #ifdef INET6 2366 case SCTP_IPV6_ADDRESS: 2367 { 2368 /* ipv6 address param */ 2369 struct sctp_ipv6addr_param *p6, p6_buf; 2370 2371 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2372 return NULL; 2373 } 2374 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2375 offset + sizeof(struct sctp_asconf_chunk), 2376 &p6_buf.ph, sizeof(*p6)); 2377 if (p6 == NULL) { 2378 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2379 __FUNCTION__); 2380 return (NULL); 2381 } 2382 sin6 = (struct sockaddr_in6 *)&remote_store; 2383 sin6->sin6_family = AF_INET6; 2384 sin6->sin6_len = sizeof(*sin6); 2385 sin6->sin6_port = sh->src_port; 2386 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2387 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2388 zero_address = 1; 2389 break; 2390 } 2391 #endif 2392 #ifdef INET 2393 case SCTP_IPV4_ADDRESS: 2394 { 2395 /* ipv4 address param */ 2396 struct sctp_ipv4addr_param *p4, p4_buf; 2397 2398 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2399 return NULL; 2400 } 2401 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2402 offset + sizeof(struct sctp_asconf_chunk), 2403 &p4_buf.ph, sizeof(*p4)); 2404 if (p4 == NULL) { 2405 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2406 __FUNCTION__); 2407 return (NULL); 2408 } 2409 sin = (struct sockaddr_in *)&remote_store; 2410 sin->sin_family = AF_INET; 2411 sin->sin_len = sizeof(*sin); 2412 sin->sin_port = sh->src_port; 2413 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2414 if (sin->sin_addr.s_addr == INADDR_ANY) 2415 zero_address = 1; 2416 break; 2417 } 2418 #endif 2419 default: 2420 /* invalid address param type */ 2421 return NULL; 2422 } 2423 2424 if (zero_address) { 2425 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p, 2426 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2427 /* 2428 * printf("findassociation_ep_asconf: zero lookup address 2429 * finds stcb 0x%x\n", (uint32_t)stcb); 2430 */ 2431 } else { 2432 stcb = sctp_findassociation_ep_addr(inp_p, 2433 (struct sockaddr *)&remote_store, netp, 2434 to, NULL); 2435 } 2436 return (stcb); 2437 } 2438 2439 2440 /* 2441 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2442 * addresses. This way if we don't get a bind we by default pick a ephemeral 2443 * port with all addresses bound. 2444 */ 2445 int 2446 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2447 { 2448 /* 2449 * we get called when a new endpoint starts up. We need to allocate 2450 * the sctp_inpcb structure from the zone and init it. Mark it as 2451 * unbound and find a port that we can use as an ephemeral with 2452 * INADDR_ANY. If the user binds later no problem we can then add in 2453 * the specific addresses. And setup the default parameters for the 2454 * EP. 2455 */ 2456 int i, error; 2457 struct sctp_inpcb *inp; 2458 struct sctp_pcb *m; 2459 struct timeval time; 2460 sctp_sharedkey_t *null_key; 2461 2462 error = 0; 2463 2464 SCTP_INP_INFO_WLOCK(); 2465 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2466 if (inp == NULL) { 2467 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2468 SCTP_INP_INFO_WUNLOCK(); 2469 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2470 return (ENOBUFS); 2471 } 2472 /* zap it */ 2473 bzero(inp, sizeof(*inp)); 2474 2475 /* bump generations */ 2476 /* setup socket pointers */ 2477 inp->sctp_socket = so; 2478 inp->ip_inp.inp.inp_socket = so; 2479 #ifdef INET6 2480 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2481 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2482 } 2483 #endif 2484 inp->sctp_associd_counter = 1; 2485 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2486 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2487 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2488 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2489 /* init the small hash table we use to track asocid <-> tcb */ 2490 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2491 if (inp->sctp_asocidhash == NULL) { 2492 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2493 SCTP_INP_INFO_WUNLOCK(); 2494 return (ENOBUFS); 2495 } 2496 #ifdef IPSEC 2497 { 2498 struct inpcbpolicy *pcb_sp = NULL; 2499 2500 error = ipsec_init_policy(so, &pcb_sp); 2501 /* Arrange to share the policy */ 2502 inp->ip_inp.inp.inp_sp = pcb_sp; 2503 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2504 } 2505 if (error != 0) { 2506 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2507 SCTP_INP_INFO_WUNLOCK(); 2508 return error; 2509 } 2510 #endif /* IPSEC */ 2511 SCTP_INCR_EP_COUNT(); 2512 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2513 SCTP_INP_INFO_WUNLOCK(); 2514 2515 so->so_pcb = (caddr_t)inp; 2516 2517 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2518 /* UDP style socket */ 2519 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2520 SCTP_PCB_FLAGS_UNBOUND); 2521 /* Be sure it is NON-BLOCKING IO for UDP */ 2522 /* SCTP_SET_SO_NBIO(so); */ 2523 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2524 /* TCP style socket */ 2525 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2526 SCTP_PCB_FLAGS_UNBOUND); 2527 /* Be sure we have blocking IO by default */ 2528 SCTP_CLEAR_SO_NBIO(so); 2529 } else { 2530 /* 2531 * unsupported socket type (RAW, etc)- in case we missed it 2532 * in protosw 2533 */ 2534 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2535 so->so_pcb = NULL; 2536 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2537 return (EOPNOTSUPP); 2538 } 2539 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2540 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2541 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2542 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2543 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2544 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2545 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2546 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2547 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2548 } 2549 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2550 &inp->sctp_hashmark); 2551 if (inp->sctp_tcbhash == NULL) { 2552 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2553 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2554 so->so_pcb = NULL; 2555 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2556 return (ENOBUFS); 2557 } 2558 inp->def_vrf_id = vrf_id; 2559 2560 SCTP_INP_INFO_WLOCK(); 2561 SCTP_INP_LOCK_INIT(inp); 2562 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2563 SCTP_INP_READ_INIT(inp); 2564 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2565 /* lock the new ep */ 2566 SCTP_INP_WLOCK(inp); 2567 2568 /* add it to the info area */ 2569 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2570 SCTP_INP_INFO_WUNLOCK(); 2571 2572 TAILQ_INIT(&inp->read_queue); 2573 LIST_INIT(&inp->sctp_addr_list); 2574 2575 LIST_INIT(&inp->sctp_asoc_list); 2576 2577 #ifdef SCTP_TRACK_FREED_ASOCS 2578 /* TEMP CODE */ 2579 LIST_INIT(&inp->sctp_asoc_free_list); 2580 #endif 2581 /* Init the timer structure for signature change */ 2582 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2583 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2584 2585 /* now init the actual endpoint default data */ 2586 m = &inp->sctp_ep; 2587 2588 /* setup the base timeout information */ 2589 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2590 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2591 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2592 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2593 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2594 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2595 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2596 /* all max/min max are in ms */ 2597 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2598 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2599 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2600 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2601 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2602 2603 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2604 2605 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2606 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2607 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2608 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2609 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2610 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2611 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2612 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2613 2614 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2615 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2616 /* number of streams to pre-open on a association */ 2617 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2618 2619 /* Add adaptation cookie */ 2620 m->adaptation_layer_indicator = 0x504C5253; 2621 2622 /* seed random number generator */ 2623 m->random_counter = 1; 2624 m->store_at = SCTP_SIGNATURE_SIZE; 2625 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2626 sctp_fill_random_store(m); 2627 2628 /* Minimum cookie size */ 2629 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2630 sizeof(struct sctp_state_cookie); 2631 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2632 2633 /* Setup the initial secret */ 2634 (void)SCTP_GETTIME_TIMEVAL(&time); 2635 m->time_of_secret_change = time.tv_sec; 2636 2637 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2638 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2639 } 2640 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2641 2642 /* How long is a cookie good for ? */ 2643 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2644 /* 2645 * Initialize authentication parameters 2646 */ 2647 m->local_hmacs = sctp_default_supported_hmaclist(); 2648 m->local_auth_chunks = sctp_alloc_chunklist(); 2649 m->default_dscp = 0; 2650 #ifdef INET6 2651 m->default_flowlabel = 0; 2652 #endif 2653 sctp_auth_set_default_chunks(m->local_auth_chunks); 2654 LIST_INIT(&m->shared_keys); 2655 /* add default NULL key as key id 0 */ 2656 null_key = sctp_alloc_sharedkey(); 2657 sctp_insert_sharedkey(&m->shared_keys, null_key); 2658 SCTP_INP_WUNLOCK(inp); 2659 #ifdef SCTP_LOG_CLOSING 2660 sctp_log_closing(inp, NULL, 12); 2661 #endif 2662 return (error); 2663 } 2664 2665 2666 void 2667 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2668 struct sctp_tcb *stcb) 2669 { 2670 struct sctp_nets *net; 2671 uint16_t lport, rport; 2672 struct sctppcbhead *head; 2673 struct sctp_laddr *laddr, *oladdr; 2674 2675 atomic_add_int(&stcb->asoc.refcnt, 1); 2676 SCTP_TCB_UNLOCK(stcb); 2677 SCTP_INP_INFO_WLOCK(); 2678 SCTP_INP_WLOCK(old_inp); 2679 SCTP_INP_WLOCK(new_inp); 2680 SCTP_TCB_LOCK(stcb); 2681 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2682 2683 new_inp->sctp_ep.time_of_secret_change = 2684 old_inp->sctp_ep.time_of_secret_change; 2685 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2686 sizeof(old_inp->sctp_ep.secret_key)); 2687 new_inp->sctp_ep.current_secret_number = 2688 old_inp->sctp_ep.current_secret_number; 2689 new_inp->sctp_ep.last_secret_number = 2690 old_inp->sctp_ep.last_secret_number; 2691 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2692 2693 /* make it so new data pours into the new socket */ 2694 stcb->sctp_socket = new_inp->sctp_socket; 2695 stcb->sctp_ep = new_inp; 2696 2697 /* Copy the port across */ 2698 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2699 rport = stcb->rport; 2700 /* Pull the tcb from the old association */ 2701 LIST_REMOVE(stcb, sctp_tcbhash); 2702 LIST_REMOVE(stcb, sctp_tcblist); 2703 if (stcb->asoc.in_asocid_hash) { 2704 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2705 } 2706 /* Now insert the new_inp into the TCP connected hash */ 2707 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2708 2709 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2710 /* Its safe to access */ 2711 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2712 2713 /* Now move the tcb into the endpoint list */ 2714 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2715 /* 2716 * Question, do we even need to worry about the ep-hash since we 2717 * only have one connection? Probably not :> so lets get rid of it 2718 * and not suck up any kernel memory in that. 2719 */ 2720 if (stcb->asoc.in_asocid_hash) { 2721 struct sctpasochead *lhd; 2722 2723 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2724 new_inp->hashasocidmark)]; 2725 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2726 } 2727 /* Ok. Let's restart timer. */ 2728 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2729 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2730 stcb, net); 2731 } 2732 2733 SCTP_INP_INFO_WUNLOCK(); 2734 if (new_inp->sctp_tcbhash != NULL) { 2735 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2736 new_inp->sctp_tcbhash = NULL; 2737 } 2738 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2739 /* Subset bound, so copy in the laddr list from the old_inp */ 2740 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2741 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2742 if (laddr == NULL) { 2743 /* 2744 * Gak, what can we do? This assoc is really 2745 * HOSED. We probably should send an abort 2746 * here. 2747 */ 2748 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2749 continue; 2750 } 2751 SCTP_INCR_LADDR_COUNT(); 2752 bzero(laddr, sizeof(*laddr)); 2753 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2754 laddr->ifa = oladdr->ifa; 2755 atomic_add_int(&laddr->ifa->refcount, 1); 2756 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2757 sctp_nxt_addr); 2758 new_inp->laddr_count++; 2759 if (oladdr == stcb->asoc.last_used_address) { 2760 stcb->asoc.last_used_address = laddr; 2761 } 2762 } 2763 } 2764 /* 2765 * Now any running timers need to be adjusted since we really don't 2766 * care if they are running or not just blast in the new_inp into 2767 * all of them. 2768 */ 2769 2770 stcb->asoc.dack_timer.ep = (void *)new_inp; 2771 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2772 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2773 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2774 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2775 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2776 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2777 /* now what about the nets? */ 2778 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2779 net->pmtu_timer.ep = (void *)new_inp; 2780 net->hb_timer.ep = (void *)new_inp; 2781 net->rxt_timer.ep = (void *)new_inp; 2782 } 2783 SCTP_INP_WUNLOCK(new_inp); 2784 SCTP_INP_WUNLOCK(old_inp); 2785 } 2786 2787 2788 2789 2790 /* sctp_ifap is used to bypass normal local address validation checks */ 2791 int 2792 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2793 struct sctp_ifa *sctp_ifap, struct thread *p) 2794 { 2795 /* bind a ep to a socket address */ 2796 struct sctppcbhead *head; 2797 struct sctp_inpcb *inp, *inp_tmp; 2798 struct inpcb *ip_inp; 2799 int port_reuse_active = 0; 2800 int bindall; 2801 uint16_t lport; 2802 int error; 2803 uint32_t vrf_id; 2804 2805 lport = 0; 2806 error = 0; 2807 bindall = 1; 2808 inp = (struct sctp_inpcb *)so->so_pcb; 2809 ip_inp = (struct inpcb *)so->so_pcb; 2810 #ifdef SCTP_DEBUG 2811 if (addr) { 2812 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2813 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2814 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2815 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2816 } 2817 #endif 2818 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2819 /* already did a bind, subsequent binds NOT allowed ! */ 2820 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2821 return (EINVAL); 2822 } 2823 #ifdef INVARIANTS 2824 if (p == NULL) 2825 panic("null proc/thread"); 2826 #endif 2827 if (addr != NULL) { 2828 switch (addr->sa_family) { 2829 #ifdef INET 2830 case AF_INET: 2831 { 2832 struct sockaddr_in *sin; 2833 2834 /* IPV6_V6ONLY socket? */ 2835 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2836 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2837 return (EINVAL); 2838 } 2839 if (addr->sa_len != sizeof(*sin)) { 2840 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2841 return (EINVAL); 2842 } 2843 sin = (struct sockaddr_in *)addr; 2844 lport = sin->sin_port; 2845 /* 2846 * For LOOPBACK the prison_local_ip4() call 2847 * will transmute the ip address to the 2848 * proper value. 2849 */ 2850 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2851 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2852 return (error); 2853 } 2854 if (sin->sin_addr.s_addr != INADDR_ANY) { 2855 bindall = 0; 2856 } 2857 break; 2858 } 2859 #endif 2860 #ifdef INET6 2861 case AF_INET6: 2862 { 2863 /* 2864 * Only for pure IPv6 Address. (No IPv4 2865 * Mapped!) 2866 */ 2867 struct sockaddr_in6 *sin6; 2868 2869 sin6 = (struct sockaddr_in6 *)addr; 2870 2871 if (addr->sa_len != sizeof(*sin6)) { 2872 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2873 return (EINVAL); 2874 } 2875 lport = sin6->sin6_port; 2876 2877 /* 2878 * For LOOPBACK the prison_local_ip6() call 2879 * will transmute the ipv6 address to the 2880 * proper value. 2881 */ 2882 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2883 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2884 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2885 return (error); 2886 } 2887 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2888 bindall = 0; 2889 /* KAME hack: embed scopeid */ 2890 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2891 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2892 return (EINVAL); 2893 } 2894 } 2895 /* this must be cleared for ifa_ifwithaddr() */ 2896 sin6->sin6_scope_id = 0; 2897 break; 2898 } 2899 #endif 2900 default: 2901 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2902 return (EAFNOSUPPORT); 2903 } 2904 } 2905 SCTP_INP_INFO_WLOCK(); 2906 SCTP_INP_WLOCK(inp); 2907 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2908 vrf_id = inp->def_vrf_id; 2909 2910 /* increase our count due to the unlock we do */ 2911 SCTP_INP_INCR_REF(inp); 2912 if (lport) { 2913 /* 2914 * Did the caller specify a port? if so we must see if a ep 2915 * already has this one bound. 2916 */ 2917 /* got to be root to get at low ports */ 2918 if (ntohs(lport) < IPPORT_RESERVED) { 2919 if (p && (error = 2920 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2921 )) { 2922 SCTP_INP_DECR_REF(inp); 2923 SCTP_INP_WUNLOCK(inp); 2924 SCTP_INP_INFO_WUNLOCK(); 2925 return (error); 2926 } 2927 } 2928 if (p == NULL) { 2929 SCTP_INP_DECR_REF(inp); 2930 SCTP_INP_WUNLOCK(inp); 2931 SCTP_INP_INFO_WUNLOCK(); 2932 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2933 return (error); 2934 } 2935 SCTP_INP_WUNLOCK(inp); 2936 if (bindall) { 2937 vrf_id = inp->def_vrf_id; 2938 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2939 if (inp_tmp != NULL) { 2940 /* 2941 * lock guy returned and lower count note 2942 * that we are not bound so inp_tmp should 2943 * NEVER be inp. And it is this inp 2944 * (inp_tmp) that gets the reference bump, 2945 * so we must lower it. 2946 */ 2947 SCTP_INP_DECR_REF(inp_tmp); 2948 /* unlock info */ 2949 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2950 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2951 /* 2952 * Ok, must be one-2-one and 2953 * allowing port re-use 2954 */ 2955 port_reuse_active = 1; 2956 goto continue_anyway; 2957 } 2958 SCTP_INP_DECR_REF(inp); 2959 SCTP_INP_INFO_WUNLOCK(); 2960 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2961 return (EADDRINUSE); 2962 } 2963 } else { 2964 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2965 if (inp_tmp != NULL) { 2966 /* 2967 * lock guy returned and lower count note 2968 * that we are not bound so inp_tmp should 2969 * NEVER be inp. And it is this inp 2970 * (inp_tmp) that gets the reference bump, 2971 * so we must lower it. 2972 */ 2973 SCTP_INP_DECR_REF(inp_tmp); 2974 /* unlock info */ 2975 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2976 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2977 /* 2978 * Ok, must be one-2-one and 2979 * allowing port re-use 2980 */ 2981 port_reuse_active = 1; 2982 goto continue_anyway; 2983 } 2984 SCTP_INP_DECR_REF(inp); 2985 SCTP_INP_INFO_WUNLOCK(); 2986 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2987 return (EADDRINUSE); 2988 } 2989 } 2990 continue_anyway: 2991 SCTP_INP_WLOCK(inp); 2992 if (bindall) { 2993 /* verify that no lport is not used by a singleton */ 2994 if ((port_reuse_active == 0) && 2995 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2996 ) { 2997 /* Sorry someone already has this one bound */ 2998 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2999 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3000 port_reuse_active = 1; 3001 } else { 3002 SCTP_INP_DECR_REF(inp); 3003 SCTP_INP_WUNLOCK(inp); 3004 SCTP_INP_INFO_WUNLOCK(); 3005 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3006 return (EADDRINUSE); 3007 } 3008 } 3009 } 3010 } else { 3011 uint16_t first, last, candidate; 3012 uint16_t count; 3013 int done; 3014 3015 if (ip_inp->inp_flags & INP_HIGHPORT) { 3016 first = MODULE_GLOBAL(ipport_hifirstauto); 3017 last = MODULE_GLOBAL(ipport_hilastauto); 3018 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3019 if (p && (error = 3020 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3021 )) { 3022 SCTP_INP_DECR_REF(inp); 3023 SCTP_INP_WUNLOCK(inp); 3024 SCTP_INP_INFO_WUNLOCK(); 3025 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3026 return (error); 3027 } 3028 first = MODULE_GLOBAL(ipport_lowfirstauto); 3029 last = MODULE_GLOBAL(ipport_lowlastauto); 3030 } else { 3031 first = MODULE_GLOBAL(ipport_firstauto); 3032 last = MODULE_GLOBAL(ipport_lastauto); 3033 } 3034 if (first > last) { 3035 uint16_t temp; 3036 3037 temp = first; 3038 first = last; 3039 last = temp; 3040 } 3041 count = last - first + 1; /* number of candidates */ 3042 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3043 3044 done = 0; 3045 while (!done) { 3046 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3047 done = 1; 3048 } 3049 if (!done) { 3050 if (--count == 0) { 3051 SCTP_INP_DECR_REF(inp); 3052 SCTP_INP_WUNLOCK(inp); 3053 SCTP_INP_INFO_WUNLOCK(); 3054 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3055 return (EADDRINUSE); 3056 } 3057 if (candidate == last) 3058 candidate = first; 3059 else 3060 candidate = candidate + 1; 3061 } 3062 } 3063 lport = htons(candidate); 3064 } 3065 SCTP_INP_DECR_REF(inp); 3066 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3067 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3068 /* 3069 * this really should not happen. The guy did a non-blocking 3070 * bind and then did a close at the same time. 3071 */ 3072 SCTP_INP_WUNLOCK(inp); 3073 SCTP_INP_INFO_WUNLOCK(); 3074 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3075 return (EINVAL); 3076 } 3077 /* ok we look clear to give out this port, so lets setup the binding */ 3078 if (bindall) { 3079 /* binding to all addresses, so just set in the proper flags */ 3080 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3081 /* set the automatic addr changes from kernel flag */ 3082 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3083 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3084 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3085 } else { 3086 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3087 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3088 } 3089 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3090 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3091 } else { 3092 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3093 } 3094 /* 3095 * set the automatic mobility_base from kernel flag (by 3096 * micchie) 3097 */ 3098 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3099 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3100 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3101 } else { 3102 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3103 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3104 } 3105 /* 3106 * set the automatic mobility_fasthandoff from kernel flag 3107 * (by micchie) 3108 */ 3109 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3110 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3111 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3112 } else { 3113 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3114 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3115 } 3116 } else { 3117 /* 3118 * bind specific, make sure flags is off and add a new 3119 * address structure to the sctp_addr_list inside the ep 3120 * structure. 3121 * 3122 * We will need to allocate one and insert it at the head. The 3123 * socketopt call can just insert new addresses in there as 3124 * well. It will also have to do the embed scope kame hack 3125 * too (before adding). 3126 */ 3127 struct sctp_ifa *ifa; 3128 struct sockaddr_storage store_sa; 3129 3130 memset(&store_sa, 0, sizeof(store_sa)); 3131 switch (addr->sa_family) { 3132 case AF_INET: 3133 { 3134 struct sockaddr_in *sin; 3135 3136 sin = (struct sockaddr_in *)&store_sa; 3137 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3138 sin->sin_port = 0; 3139 break; 3140 } 3141 case AF_INET6: 3142 { 3143 struct sockaddr_in6 *sin6; 3144 3145 sin6 = (struct sockaddr_in6 *)&store_sa; 3146 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3147 sin6->sin6_port = 0; 3148 break; 3149 } 3150 default: 3151 break; 3152 } 3153 /* 3154 * first find the interface with the bound address need to 3155 * zero out the port to find the address! yuck! can't do 3156 * this earlier since need port for sctp_pcb_findep() 3157 */ 3158 if (sctp_ifap != NULL) 3159 ifa = sctp_ifap; 3160 else { 3161 /* 3162 * Note for BSD we hit here always other O/S's will 3163 * pass things in via the sctp_ifap argument 3164 * (Panda). 3165 */ 3166 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3167 vrf_id, SCTP_ADDR_NOT_LOCKED); 3168 } 3169 if (ifa == NULL) { 3170 /* Can't find an interface with that address */ 3171 SCTP_INP_WUNLOCK(inp); 3172 SCTP_INP_INFO_WUNLOCK(); 3173 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3174 return (EADDRNOTAVAIL); 3175 } 3176 #ifdef INET6 3177 if (addr->sa_family == AF_INET6) { 3178 /* GAK, more FIXME IFA lock? */ 3179 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3180 /* Can't bind a non-existent addr. */ 3181 SCTP_INP_WUNLOCK(inp); 3182 SCTP_INP_INFO_WUNLOCK(); 3183 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3184 return (EINVAL); 3185 } 3186 } 3187 #endif 3188 /* we're not bound all */ 3189 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3190 /* allow bindx() to send ASCONF's for binding changes */ 3191 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3192 /* clear automatic addr changes from kernel flag */ 3193 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3194 3195 /* add this address to the endpoint list */ 3196 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3197 if (error != 0) { 3198 SCTP_INP_WUNLOCK(inp); 3199 SCTP_INP_INFO_WUNLOCK(); 3200 return (error); 3201 } 3202 inp->laddr_count++; 3203 } 3204 /* find the bucket */ 3205 if (port_reuse_active) { 3206 /* Put it into tcp 1-2-1 hash */ 3207 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3208 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3209 } else { 3210 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3211 } 3212 /* put it in the bucket */ 3213 LIST_INSERT_HEAD(head, inp, sctp_hash); 3214 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3215 head, ntohs(lport), port_reuse_active); 3216 /* set in the port */ 3217 inp->sctp_lport = lport; 3218 3219 /* turn off just the unbound flag */ 3220 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3221 SCTP_INP_WUNLOCK(inp); 3222 SCTP_INP_INFO_WUNLOCK(); 3223 return (0); 3224 } 3225 3226 3227 static void 3228 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3229 { 3230 struct sctp_iterator *it, *nit; 3231 3232 /* 3233 * We enter with the only the ITERATOR_LOCK in place and a write 3234 * lock on the inp_info stuff. 3235 */ 3236 it = sctp_it_ctl.cur_it; 3237 if (it && (it->vn != curvnet)) { 3238 /* Its not looking at our VNET */ 3239 return; 3240 } 3241 if (it && (it->inp == inp)) { 3242 /* 3243 * This is tricky and we hold the iterator lock, but when it 3244 * returns and gets the lock (when we release it) the 3245 * iterator will try to operate on inp. We need to stop that 3246 * from happening. But of course the iterator has a 3247 * reference on the stcb and inp. We can mark it and it will 3248 * stop. 3249 * 3250 * If its a single iterator situation, we set the end iterator 3251 * flag. Otherwise we set the iterator to go to the next 3252 * inp. 3253 * 3254 */ 3255 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3256 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3257 } else { 3258 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3259 } 3260 } 3261 /* 3262 * Now go through and remove any single reference to our inp that 3263 * may be still pending on the list 3264 */ 3265 SCTP_IPI_ITERATOR_WQ_LOCK(); 3266 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3267 if (it->vn != curvnet) { 3268 continue; 3269 } 3270 if (it->inp == inp) { 3271 /* This one points to me is it inp specific? */ 3272 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3273 /* Remove and free this one */ 3274 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3275 it, sctp_nxt_itr); 3276 if (it->function_atend != NULL) { 3277 (*it->function_atend) (it->pointer, it->val); 3278 } 3279 SCTP_FREE(it, SCTP_M_ITER); 3280 } else { 3281 it->inp = LIST_NEXT(it->inp, sctp_list); 3282 if (it->inp) { 3283 SCTP_INP_INCR_REF(it->inp); 3284 } 3285 } 3286 /* 3287 * When its put in the refcnt is incremented so decr 3288 * it 3289 */ 3290 SCTP_INP_DECR_REF(inp); 3291 } 3292 } 3293 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3294 } 3295 3296 /* release sctp_inpcb unbind the port */ 3297 void 3298 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3299 { 3300 /* 3301 * Here we free a endpoint. We must find it (if it is in the Hash 3302 * table) and remove it from there. Then we must also find it in the 3303 * overall list and remove it from there. After all removals are 3304 * complete then any timer has to be stopped. Then start the actual 3305 * freeing. a) Any local lists. b) Any associations. c) The hash of 3306 * all associations. d) finally the ep itself. 3307 */ 3308 struct sctp_pcb *m; 3309 struct sctp_tcb *asoc, *nasoc; 3310 struct sctp_laddr *laddr, *nladdr; 3311 struct inpcb *ip_pcb; 3312 struct socket *so; 3313 int being_refed = 0; 3314 struct sctp_queued_to_read *sq, *nsq; 3315 int cnt; 3316 sctp_sharedkey_t *shared_key, *nshared_key; 3317 3318 3319 #ifdef SCTP_LOG_CLOSING 3320 sctp_log_closing(inp, NULL, 0); 3321 #endif 3322 SCTP_ITERATOR_LOCK(); 3323 /* mark any iterators on the list or being processed */ 3324 sctp_iterator_inp_being_freed(inp); 3325 SCTP_ITERATOR_UNLOCK(); 3326 so = inp->sctp_socket; 3327 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3328 /* been here before.. eeks.. get out of here */ 3329 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3330 #ifdef SCTP_LOG_CLOSING 3331 sctp_log_closing(inp, NULL, 1); 3332 #endif 3333 return; 3334 } 3335 SCTP_ASOC_CREATE_LOCK(inp); 3336 SCTP_INP_INFO_WLOCK(); 3337 3338 SCTP_INP_WLOCK(inp); 3339 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3340 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3341 /* socket is gone, so no more wakeups allowed */ 3342 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3343 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3344 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3345 3346 } 3347 /* First time through we have the socket lock, after that no more. */ 3348 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3349 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3350 3351 if (inp->control) { 3352 sctp_m_freem(inp->control); 3353 inp->control = NULL; 3354 } 3355 if (inp->pkt) { 3356 sctp_m_freem(inp->pkt); 3357 inp->pkt = NULL; 3358 } 3359 m = &inp->sctp_ep; 3360 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3361 * here but I will be nice :> (i.e. 3362 * ip_pcb = ep;) */ 3363 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3364 int cnt_in_sd; 3365 3366 cnt_in_sd = 0; 3367 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3368 SCTP_TCB_LOCK(asoc); 3369 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3370 /* Skip guys being freed */ 3371 cnt_in_sd++; 3372 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3373 /* 3374 * Special case - we did not start a 3375 * kill timer on the asoc due to it 3376 * was not closed. So go ahead and 3377 * start it now. 3378 */ 3379 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3380 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3381 } 3382 SCTP_TCB_UNLOCK(asoc); 3383 continue; 3384 } 3385 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3386 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3387 (asoc->asoc.total_output_queue_size == 0)) { 3388 /* 3389 * If we have data in queue, we don't want 3390 * to just free since the app may have done, 3391 * send()/close or connect/send/close. And 3392 * it wants the data to get across first. 3393 */ 3394 /* Just abandon things in the front states */ 3395 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3396 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3397 cnt_in_sd++; 3398 } 3399 continue; 3400 } 3401 /* Disconnect the socket please */ 3402 asoc->sctp_socket = NULL; 3403 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3404 if ((asoc->asoc.size_on_reasm_queue > 0) || 3405 (asoc->asoc.control_pdapi) || 3406 (asoc->asoc.size_on_all_streams > 0) || 3407 (so && (so->so_rcv.sb_cc > 0)) 3408 ) { 3409 /* Left with Data unread */ 3410 struct mbuf *op_err; 3411 3412 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3413 0, M_DONTWAIT, 1, MT_DATA); 3414 if (op_err) { 3415 /* Fill in the user initiated abort */ 3416 struct sctp_paramhdr *ph; 3417 uint32_t *ippp; 3418 3419 SCTP_BUF_LEN(op_err) = 3420 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3421 ph = mtod(op_err, 3422 struct sctp_paramhdr *); 3423 ph->param_type = htons( 3424 SCTP_CAUSE_USER_INITIATED_ABT); 3425 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3426 ippp = (uint32_t *) (ph + 1); 3427 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3428 } 3429 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3430 #if defined(SCTP_PANIC_ON_ABORT) 3431 panic("inpcb_free does an abort"); 3432 #endif 3433 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3434 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3435 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3436 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3437 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3438 } 3439 if (sctp_free_assoc(inp, asoc, 3440 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3441 cnt_in_sd++; 3442 } 3443 continue; 3444 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3445 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3446 (asoc->asoc.stream_queue_cnt == 0) 3447 ) { 3448 if (asoc->asoc.locked_on_sending) { 3449 goto abort_anyway; 3450 } 3451 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3452 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3453 struct sctp_nets *netp; 3454 3455 if (asoc->asoc.alternate) { 3456 netp = asoc->asoc.alternate; 3457 } else { 3458 netp = asoc->asoc.primary_destination; 3459 } 3460 /* 3461 * there is nothing queued to send, 3462 * so I send shutdown 3463 */ 3464 sctp_send_shutdown(asoc, netp); 3465 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3466 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3467 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3468 } 3469 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3470 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3471 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3472 netp); 3473 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3474 asoc->asoc.primary_destination); 3475 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3476 } 3477 } else { 3478 /* mark into shutdown pending */ 3479 struct sctp_stream_queue_pending *sp; 3480 3481 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3482 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3483 asoc->asoc.primary_destination); 3484 if (asoc->asoc.locked_on_sending) { 3485 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3486 sctp_streamhead); 3487 if (sp == NULL) { 3488 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3489 asoc->asoc.locked_on_sending, 3490 asoc->asoc.locked_on_sending->stream_no); 3491 } else { 3492 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3493 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3494 } 3495 } 3496 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3497 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3498 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3499 struct mbuf *op_err; 3500 3501 abort_anyway: 3502 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3503 0, M_DONTWAIT, 1, MT_DATA); 3504 if (op_err) { 3505 /* 3506 * Fill in the user 3507 * initiated abort 3508 */ 3509 struct sctp_paramhdr *ph; 3510 uint32_t *ippp; 3511 3512 SCTP_BUF_LEN(op_err) = 3513 (sizeof(struct sctp_paramhdr) + 3514 sizeof(uint32_t)); 3515 ph = mtod(op_err, 3516 struct sctp_paramhdr *); 3517 ph->param_type = htons( 3518 SCTP_CAUSE_USER_INITIATED_ABT); 3519 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3520 ippp = (uint32_t *) (ph + 1); 3521 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3522 } 3523 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3524 #if defined(SCTP_PANIC_ON_ABORT) 3525 panic("inpcb_free does an abort"); 3526 #endif 3527 3528 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3529 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3530 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3531 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3532 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3533 } 3534 if (sctp_free_assoc(inp, asoc, 3535 SCTP_PCBFREE_NOFORCE, 3536 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3537 cnt_in_sd++; 3538 } 3539 continue; 3540 } else { 3541 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3542 } 3543 } 3544 cnt_in_sd++; 3545 SCTP_TCB_UNLOCK(asoc); 3546 } 3547 /* now is there some left in our SHUTDOWN state? */ 3548 if (cnt_in_sd) { 3549 #ifdef SCTP_LOG_CLOSING 3550 sctp_log_closing(inp, NULL, 2); 3551 #endif 3552 inp->sctp_socket = NULL; 3553 SCTP_INP_WUNLOCK(inp); 3554 SCTP_ASOC_CREATE_UNLOCK(inp); 3555 SCTP_INP_INFO_WUNLOCK(); 3556 return; 3557 } 3558 } 3559 inp->sctp_socket = NULL; 3560 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3561 SCTP_PCB_FLAGS_UNBOUND) { 3562 /* 3563 * ok, this guy has been bound. It's port is somewhere in 3564 * the SCTP_BASE_INFO(hash table). Remove it! 3565 */ 3566 LIST_REMOVE(inp, sctp_hash); 3567 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3568 } 3569 /* 3570 * If there is a timer running to kill us, forget it, since it may 3571 * have a contest on the INP lock.. which would cause us to die ... 3572 */ 3573 cnt = 0; 3574 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3575 SCTP_TCB_LOCK(asoc); 3576 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3577 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3578 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3579 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3580 } 3581 cnt++; 3582 SCTP_TCB_UNLOCK(asoc); 3583 continue; 3584 } 3585 /* Free associations that are NOT killing us */ 3586 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3587 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3588 struct mbuf *op_err; 3589 uint32_t *ippp; 3590 3591 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3592 0, M_DONTWAIT, 1, MT_DATA); 3593 if (op_err) { 3594 /* Fill in the user initiated abort */ 3595 struct sctp_paramhdr *ph; 3596 3597 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3598 sizeof(uint32_t)); 3599 ph = mtod(op_err, struct sctp_paramhdr *); 3600 ph->param_type = htons( 3601 SCTP_CAUSE_USER_INITIATED_ABT); 3602 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3603 ippp = (uint32_t *) (ph + 1); 3604 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3605 3606 } 3607 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3608 #if defined(SCTP_PANIC_ON_ABORT) 3609 panic("inpcb_free does an abort"); 3610 #endif 3611 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3612 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3613 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3614 cnt++; 3615 SCTP_TCB_UNLOCK(asoc); 3616 continue; 3617 } 3618 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3619 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3620 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3621 } 3622 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3623 cnt++; 3624 } 3625 } 3626 if (cnt) { 3627 /* Ok we have someone out there that will kill us */ 3628 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3629 #ifdef SCTP_LOG_CLOSING 3630 sctp_log_closing(inp, NULL, 3); 3631 #endif 3632 SCTP_INP_WUNLOCK(inp); 3633 SCTP_ASOC_CREATE_UNLOCK(inp); 3634 SCTP_INP_INFO_WUNLOCK(); 3635 return; 3636 } 3637 if (SCTP_INP_LOCK_CONTENDED(inp)) 3638 being_refed++; 3639 if (SCTP_INP_READ_CONTENDED(inp)) 3640 being_refed++; 3641 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3642 being_refed++; 3643 3644 if ((inp->refcount) || 3645 (being_refed) || 3646 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3647 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3648 #ifdef SCTP_LOG_CLOSING 3649 sctp_log_closing(inp, NULL, 4); 3650 #endif 3651 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3652 SCTP_INP_WUNLOCK(inp); 3653 SCTP_ASOC_CREATE_UNLOCK(inp); 3654 SCTP_INP_INFO_WUNLOCK(); 3655 return; 3656 } 3657 inp->sctp_ep.signature_change.type = 0; 3658 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3659 /* 3660 * Remove it from the list .. last thing we need a lock for. 3661 */ 3662 LIST_REMOVE(inp, sctp_list); 3663 SCTP_INP_WUNLOCK(inp); 3664 SCTP_ASOC_CREATE_UNLOCK(inp); 3665 SCTP_INP_INFO_WUNLOCK(); 3666 /* 3667 * Now we release all locks. Since this INP cannot be found anymore 3668 * except possibly by the kill timer that might be running. We call 3669 * the drain function here. It should hit the case were it sees the 3670 * ACTIVE flag cleared and exit out freeing us to proceed and 3671 * destroy everything. 3672 */ 3673 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3674 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3675 } else { 3676 /* Probably un-needed */ 3677 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3678 } 3679 3680 #ifdef SCTP_LOG_CLOSING 3681 sctp_log_closing(inp, NULL, 5); 3682 #endif 3683 3684 3685 if ((inp->sctp_asocidhash) != NULL) { 3686 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3687 inp->sctp_asocidhash = NULL; 3688 } 3689 /* sa_ignore FREED_MEMORY */ 3690 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3691 /* Its only abandoned if it had data left */ 3692 if (sq->length) 3693 SCTP_STAT_INCR(sctps_left_abandon); 3694 3695 TAILQ_REMOVE(&inp->read_queue, sq, next); 3696 sctp_free_remote_addr(sq->whoFrom); 3697 if (so) 3698 so->so_rcv.sb_cc -= sq->length; 3699 if (sq->data) { 3700 sctp_m_freem(sq->data); 3701 sq->data = NULL; 3702 } 3703 /* 3704 * no need to free the net count, since at this point all 3705 * assoc's are gone. 3706 */ 3707 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3708 SCTP_DECR_READQ_COUNT(); 3709 } 3710 /* Now the sctp_pcb things */ 3711 /* 3712 * free each asoc if it is not already closed/free. we can't use the 3713 * macro here since le_next will get freed as part of the 3714 * sctp_free_assoc() call. 3715 */ 3716 cnt = 0; 3717 if (so) { 3718 #ifdef IPSEC 3719 ipsec_delete_pcbpolicy(ip_pcb); 3720 #endif /* IPSEC */ 3721 3722 /* Unlocks not needed since the socket is gone now */ 3723 } 3724 if (ip_pcb->inp_options) { 3725 (void)sctp_m_free(ip_pcb->inp_options); 3726 ip_pcb->inp_options = 0; 3727 } 3728 #ifdef INET6 3729 if (ip_pcb->inp_vflag & INP_IPV6) { 3730 struct in6pcb *in6p; 3731 3732 in6p = (struct in6pcb *)inp; 3733 ip6_freepcbopts(in6p->in6p_outputopts); 3734 } 3735 #endif /* INET6 */ 3736 ip_pcb->inp_vflag = 0; 3737 /* free up authentication fields */ 3738 if (inp->sctp_ep.local_auth_chunks != NULL) 3739 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3740 if (inp->sctp_ep.local_hmacs != NULL) 3741 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3742 3743 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3744 LIST_REMOVE(shared_key, next); 3745 sctp_free_sharedkey(shared_key); 3746 /* sa_ignore FREED_MEMORY */ 3747 } 3748 3749 /* 3750 * if we have an address list the following will free the list of 3751 * ifaddr's that are set into this ep. Again macro limitations here, 3752 * since the LIST_FOREACH could be a bad idea. 3753 */ 3754 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3755 sctp_remove_laddr(laddr); 3756 } 3757 3758 #ifdef SCTP_TRACK_FREED_ASOCS 3759 /* TEMP CODE */ 3760 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3761 LIST_REMOVE(asoc, sctp_tcblist); 3762 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3763 SCTP_DECR_ASOC_COUNT(); 3764 } 3765 /* *** END TEMP CODE *** */ 3766 #endif 3767 /* Now lets see about freeing the EP hash table. */ 3768 if (inp->sctp_tcbhash != NULL) { 3769 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3770 inp->sctp_tcbhash = NULL; 3771 } 3772 /* Now we must put the ep memory back into the zone pool */ 3773 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3774 SCTP_INP_LOCK_DESTROY(inp); 3775 SCTP_INP_READ_DESTROY(inp); 3776 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3777 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3778 SCTP_DECR_EP_COUNT(); 3779 } 3780 3781 3782 struct sctp_nets * 3783 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3784 { 3785 struct sctp_nets *net; 3786 3787 /* locate the address */ 3788 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3789 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3790 return (net); 3791 } 3792 return (NULL); 3793 } 3794 3795 3796 int 3797 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3798 { 3799 struct sctp_ifa *sctp_ifa; 3800 3801 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3802 if (sctp_ifa) { 3803 return (1); 3804 } else { 3805 return (0); 3806 } 3807 } 3808 3809 /* 3810 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3811 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3812 * stats of stuff. 3813 */ 3814 int 3815 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3816 struct sctp_nets **netp, int set_scope, int from) 3817 { 3818 /* 3819 * The following is redundant to the same lines in the 3820 * sctp_aloc_assoc() but is needed since others call the add address 3821 * function 3822 */ 3823 struct sctp_nets *net, *netfirst; 3824 int addr_inscope; 3825 3826 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3827 from); 3828 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3829 3830 netfirst = sctp_findnet(stcb, newaddr); 3831 if (netfirst) { 3832 /* 3833 * Lie and return ok, we don't want to make the association 3834 * go away for this behavior. It will happen in the TCP 3835 * model in a connected socket. It does not reach the hash 3836 * table until after the association is built so it can't be 3837 * found. Mark as reachable, since the initial creation will 3838 * have been cleared and the NOT_IN_ASSOC flag will have 3839 * been added... and we don't want to end up removing it 3840 * back out. 3841 */ 3842 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3843 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3844 SCTP_ADDR_UNCONFIRMED); 3845 } else { 3846 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3847 } 3848 3849 return (0); 3850 } 3851 addr_inscope = 1; 3852 switch (newaddr->sa_family) { 3853 #ifdef INET 3854 case AF_INET: 3855 { 3856 struct sockaddr_in *sin; 3857 3858 sin = (struct sockaddr_in *)newaddr; 3859 if (sin->sin_addr.s_addr == 0) { 3860 /* Invalid address */ 3861 return (-1); 3862 } 3863 /* zero out the bzero area */ 3864 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3865 3866 /* assure len is set */ 3867 sin->sin_len = sizeof(struct sockaddr_in); 3868 if (set_scope) { 3869 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3870 stcb->ipv4_local_scope = 1; 3871 #else 3872 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3873 stcb->asoc.ipv4_local_scope = 1; 3874 } 3875 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3876 } else { 3877 /* Validate the address is in scope */ 3878 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3879 (stcb->asoc.ipv4_local_scope == 0)) { 3880 addr_inscope = 0; 3881 } 3882 } 3883 break; 3884 } 3885 #endif 3886 #ifdef INET6 3887 case AF_INET6: 3888 { 3889 struct sockaddr_in6 *sin6; 3890 3891 sin6 = (struct sockaddr_in6 *)newaddr; 3892 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3893 /* Invalid address */ 3894 return (-1); 3895 } 3896 /* assure len is set */ 3897 sin6->sin6_len = sizeof(struct sockaddr_in6); 3898 if (set_scope) { 3899 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3900 stcb->asoc.loopback_scope = 1; 3901 stcb->asoc.local_scope = 0; 3902 stcb->asoc.ipv4_local_scope = 1; 3903 stcb->asoc.site_scope = 1; 3904 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3905 /* 3906 * If the new destination is a 3907 * LINK_LOCAL we must have common 3908 * site scope. Don't set the local 3909 * scope since we may not share all 3910 * links, only loopback can do this. 3911 * Links on the local network would 3912 * also be on our private network 3913 * for v4 too. 3914 */ 3915 stcb->asoc.ipv4_local_scope = 1; 3916 stcb->asoc.site_scope = 1; 3917 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3918 /* 3919 * If the new destination is 3920 * SITE_LOCAL then we must have site 3921 * scope in common. 3922 */ 3923 stcb->asoc.site_scope = 1; 3924 } 3925 } else { 3926 /* Validate the address is in scope */ 3927 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3928 (stcb->asoc.loopback_scope == 0)) { 3929 addr_inscope = 0; 3930 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3931 (stcb->asoc.local_scope == 0)) { 3932 addr_inscope = 0; 3933 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3934 (stcb->asoc.site_scope == 0)) { 3935 addr_inscope = 0; 3936 } 3937 } 3938 break; 3939 } 3940 #endif 3941 default: 3942 /* not supported family type */ 3943 return (-1); 3944 } 3945 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3946 if (net == NULL) { 3947 return (-1); 3948 } 3949 SCTP_INCR_RADDR_COUNT(); 3950 bzero(net, sizeof(struct sctp_nets)); 3951 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3952 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3953 switch (newaddr->sa_family) { 3954 #ifdef INET 3955 case AF_INET: 3956 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3957 break; 3958 #endif 3959 #ifdef INET6 3960 case AF_INET6: 3961 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3962 break; 3963 #endif 3964 default: 3965 break; 3966 } 3967 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3968 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3969 stcb->asoc.loopback_scope = 1; 3970 stcb->asoc.ipv4_local_scope = 1; 3971 stcb->asoc.local_scope = 0; 3972 stcb->asoc.site_scope = 1; 3973 addr_inscope = 1; 3974 } 3975 net->failure_threshold = stcb->asoc.def_net_failure; 3976 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3977 if (addr_inscope == 0) { 3978 net->dest_state = (SCTP_ADDR_REACHABLE | 3979 SCTP_ADDR_OUT_OF_SCOPE); 3980 } else { 3981 if (from == SCTP_ADDR_IS_CONFIRMED) 3982 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3983 net->dest_state = SCTP_ADDR_REACHABLE; 3984 else 3985 net->dest_state = SCTP_ADDR_REACHABLE | 3986 SCTP_ADDR_UNCONFIRMED; 3987 } 3988 /* 3989 * We set this to 0, the timer code knows that this means its an 3990 * initial value 3991 */ 3992 net->rto_needed = 1; 3993 net->RTO = 0; 3994 net->RTO_measured = 0; 3995 stcb->asoc.numnets++; 3996 *(&net->ref_count) = 1; 3997 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3998 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 3999 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 4000 } else { 4001 net->port = 0; 4002 } 4003 net->dscp = stcb->asoc.default_dscp; 4004 #ifdef INET6 4005 net->flowlabel = stcb->asoc.default_flowlabel; 4006 #endif 4007 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 4008 net->dest_state |= SCTP_ADDR_NOHB; 4009 } else { 4010 net->dest_state &= ~SCTP_ADDR_NOHB; 4011 } 4012 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 4013 net->dest_state |= SCTP_ADDR_NO_PMTUD; 4014 } else { 4015 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 4016 } 4017 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 4018 /* Init the timer structure */ 4019 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 4020 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 4021 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 4022 4023 /* Now generate a route for this guy */ 4024 #ifdef INET6 4025 /* KAME hack: embed scopeid */ 4026 if (newaddr->sa_family == AF_INET6) { 4027 struct sockaddr_in6 *sin6; 4028 4029 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4030 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 4031 sin6->sin6_scope_id = 0; 4032 } 4033 #endif 4034 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 4035 4036 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 4037 /* Get source address */ 4038 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 4039 stcb, 4040 (sctp_route_t *) & net->ro, 4041 net, 4042 0, 4043 stcb->asoc.vrf_id); 4044 /* Now get the interface MTU */ 4045 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 4046 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 4047 } 4048 if (net->mtu > 0) { 4049 uint32_t rmtu; 4050 4051 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 4052 if (rmtu == 0) { 4053 /* 4054 * Start things off to match mtu of 4055 * interface please. 4056 */ 4057 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 4058 net->ro.ro_rt, net->mtu); 4059 } else { 4060 /* 4061 * we take the route mtu over the interface, 4062 * since the route may be leading out the 4063 * loopback, or a different interface. 4064 */ 4065 net->mtu = rmtu; 4066 } 4067 } 4068 } 4069 if (net->mtu == 0) { 4070 switch (newaddr->sa_family) { 4071 #ifdef INET 4072 case AF_INET: 4073 net->mtu = SCTP_DEFAULT_MTU; 4074 break; 4075 #endif 4076 #ifdef INET6 4077 case AF_INET6: 4078 net->mtu = 1280; 4079 break; 4080 #endif 4081 default: 4082 break; 4083 } 4084 } 4085 if (net->port) { 4086 net->mtu -= (uint32_t) sizeof(struct udphdr); 4087 } 4088 if (from == SCTP_ALLOC_ASOC) { 4089 stcb->asoc.smallest_mtu = net->mtu; 4090 } 4091 if (stcb->asoc.smallest_mtu > net->mtu) { 4092 stcb->asoc.smallest_mtu = net->mtu; 4093 } 4094 #ifdef INET6 4095 if (newaddr->sa_family == AF_INET6) { 4096 struct sockaddr_in6 *sin6; 4097 4098 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4099 (void)sa6_recoverscope(sin6); 4100 } 4101 #endif 4102 4103 /* JRS - Use the congestion control given in the CC module */ 4104 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4105 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4106 4107 /* 4108 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4109 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4110 */ 4111 net->find_pseudo_cumack = 1; 4112 net->find_rtx_pseudo_cumack = 1; 4113 net->src_addr_selected = 0; 4114 /* Choose an initial flowid. */ 4115 net->flowid = stcb->asoc.my_vtag ^ 4116 ntohs(stcb->rport) ^ 4117 ntohs(stcb->sctp_ep->sctp_lport); 4118 #ifdef INVARIANTS 4119 net->flowidset = 1; 4120 #endif 4121 if (netp) { 4122 *netp = net; 4123 } 4124 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4125 if (net->ro.ro_rt == NULL) { 4126 /* Since we have no route put it at the back */ 4127 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4128 } else if (netfirst == NULL) { 4129 /* We are the first one in the pool. */ 4130 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4131 } else if (netfirst->ro.ro_rt == NULL) { 4132 /* 4133 * First one has NO route. Place this one ahead of the first 4134 * one. 4135 */ 4136 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4137 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4138 /* 4139 * This one has a different interface than the one at the 4140 * top of the list. Place it ahead. 4141 */ 4142 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4143 } else { 4144 /* 4145 * Ok we have the same interface as the first one. Move 4146 * forward until we find either a) one with a NULL route... 4147 * insert ahead of that b) one with a different ifp.. insert 4148 * after that. c) end of the list.. insert at the tail. 4149 */ 4150 struct sctp_nets *netlook; 4151 4152 do { 4153 netlook = TAILQ_NEXT(netfirst, sctp_next); 4154 if (netlook == NULL) { 4155 /* End of the list */ 4156 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4157 break; 4158 } else if (netlook->ro.ro_rt == NULL) { 4159 /* next one has NO route */ 4160 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4161 break; 4162 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4163 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4164 net, sctp_next); 4165 break; 4166 } 4167 /* Shift forward */ 4168 netfirst = netlook; 4169 } while (netlook != NULL); 4170 } 4171 4172 /* got to have a primary set */ 4173 if (stcb->asoc.primary_destination == 0) { 4174 stcb->asoc.primary_destination = net; 4175 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4176 (net->ro.ro_rt) && 4177 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4178 /* No route to current primary adopt new primary */ 4179 stcb->asoc.primary_destination = net; 4180 } 4181 /* Validate primary is first */ 4182 net = TAILQ_FIRST(&stcb->asoc.nets); 4183 if ((net != stcb->asoc.primary_destination) && 4184 (stcb->asoc.primary_destination)) { 4185 /* 4186 * first one on the list is NOT the primary sctp_cmpaddr() 4187 * is much more efficient if the primary is the first on the 4188 * list, make it so. 4189 */ 4190 TAILQ_REMOVE(&stcb->asoc.nets, 4191 stcb->asoc.primary_destination, sctp_next); 4192 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4193 stcb->asoc.primary_destination, sctp_next); 4194 } 4195 return (0); 4196 } 4197 4198 4199 static uint32_t 4200 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4201 { 4202 uint32_t id; 4203 struct sctpasochead *head; 4204 struct sctp_tcb *lstcb; 4205 4206 SCTP_INP_WLOCK(inp); 4207 try_again: 4208 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4209 /* TSNH */ 4210 SCTP_INP_WUNLOCK(inp); 4211 return (0); 4212 } 4213 /* 4214 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4215 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4216 */ 4217 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4218 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4219 } 4220 id = inp->sctp_associd_counter; 4221 inp->sctp_associd_counter++; 4222 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4223 if (lstcb) { 4224 goto try_again; 4225 } 4226 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4227 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4228 stcb->asoc.in_asocid_hash = 1; 4229 SCTP_INP_WUNLOCK(inp); 4230 return id; 4231 } 4232 4233 /* 4234 * allocate an association and add it to the endpoint. The caller must be 4235 * careful to add all additional addresses once they are know right away or 4236 * else the assoc will be may experience a blackout scenario. 4237 */ 4238 struct sctp_tcb * 4239 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4240 int *error, uint32_t override_tag, uint32_t vrf_id, 4241 struct thread *p 4242 ) 4243 { 4244 /* note the p argument is only valid in unbound sockets */ 4245 4246 struct sctp_tcb *stcb; 4247 struct sctp_association *asoc; 4248 struct sctpasochead *head; 4249 uint16_t rport; 4250 int err; 4251 4252 /* 4253 * Assumption made here: Caller has done a 4254 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4255 * address does not exist already. 4256 */ 4257 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4258 /* Hit max assoc, sorry no more */ 4259 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4260 *error = ENOBUFS; 4261 return (NULL); 4262 } 4263 if (firstaddr == NULL) { 4264 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4265 *error = EINVAL; 4266 return (NULL); 4267 } 4268 SCTP_INP_RLOCK(inp); 4269 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4270 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4271 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4272 /* 4273 * If its in the TCP pool, its NOT allowed to create an 4274 * association. The parent listener needs to call 4275 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4276 * off, or connected one does this.. its an error. 4277 */ 4278 SCTP_INP_RUNLOCK(inp); 4279 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4280 *error = EINVAL; 4281 return (NULL); 4282 } 4283 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4284 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4285 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4286 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4287 SCTP_INP_RUNLOCK(inp); 4288 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4289 *error = EINVAL; 4290 return (NULL); 4291 } 4292 } 4293 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4294 #ifdef SCTP_DEBUG 4295 if (firstaddr) { 4296 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4297 switch (firstaddr->sa_family) { 4298 #ifdef INET 4299 case AF_INET: 4300 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4301 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4302 break; 4303 #endif 4304 #ifdef INET6 4305 case AF_INET6: 4306 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4307 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4308 break; 4309 #endif 4310 default: 4311 break; 4312 } 4313 } else { 4314 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4315 } 4316 #endif /* SCTP_DEBUG */ 4317 switch (firstaddr->sa_family) { 4318 #ifdef INET 4319 case AF_INET: 4320 { 4321 struct sockaddr_in *sin; 4322 4323 sin = (struct sockaddr_in *)firstaddr; 4324 if ((ntohs(sin->sin_port) == 0) || 4325 (sin->sin_addr.s_addr == INADDR_ANY) || 4326 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4327 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4328 /* Invalid address */ 4329 SCTP_INP_RUNLOCK(inp); 4330 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4331 *error = EINVAL; 4332 return (NULL); 4333 } 4334 rport = sin->sin_port; 4335 break; 4336 } 4337 #endif 4338 #ifdef INET6 4339 case AF_INET6: 4340 { 4341 struct sockaddr_in6 *sin6; 4342 4343 sin6 = (struct sockaddr_in6 *)firstaddr; 4344 if ((ntohs(sin6->sin6_port) == 0) || 4345 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4346 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4347 /* Invalid address */ 4348 SCTP_INP_RUNLOCK(inp); 4349 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4350 *error = EINVAL; 4351 return (NULL); 4352 } 4353 rport = sin6->sin6_port; 4354 break; 4355 } 4356 #endif 4357 default: 4358 /* not supported family type */ 4359 SCTP_INP_RUNLOCK(inp); 4360 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4361 *error = EINVAL; 4362 return (NULL); 4363 } 4364 SCTP_INP_RUNLOCK(inp); 4365 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4366 /* 4367 * If you have not performed a bind, then we need to do the 4368 * ephemeral bind for you. 4369 */ 4370 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4371 (struct sockaddr *)NULL, 4372 (struct sctp_ifa *)NULL, 4373 p 4374 ))) { 4375 /* bind error, probably perm */ 4376 *error = err; 4377 return (NULL); 4378 } 4379 } 4380 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4381 if (stcb == NULL) { 4382 /* out of memory? */ 4383 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4384 *error = ENOMEM; 4385 return (NULL); 4386 } 4387 SCTP_INCR_ASOC_COUNT(); 4388 4389 bzero(stcb, sizeof(*stcb)); 4390 asoc = &stcb->asoc; 4391 4392 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4393 SCTP_TCB_LOCK_INIT(stcb); 4394 SCTP_TCB_SEND_LOCK_INIT(stcb); 4395 stcb->rport = rport; 4396 /* setup back pointer's */ 4397 stcb->sctp_ep = inp; 4398 stcb->sctp_socket = inp->sctp_socket; 4399 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4400 /* failed */ 4401 SCTP_TCB_LOCK_DESTROY(stcb); 4402 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4403 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4404 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4405 SCTP_DECR_ASOC_COUNT(); 4406 *error = err; 4407 return (NULL); 4408 } 4409 /* and the port */ 4410 SCTP_INP_INFO_WLOCK(); 4411 SCTP_INP_WLOCK(inp); 4412 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4413 /* inpcb freed while alloc going on */ 4414 SCTP_TCB_LOCK_DESTROY(stcb); 4415 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4416 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4417 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4418 SCTP_INP_WUNLOCK(inp); 4419 SCTP_INP_INFO_WUNLOCK(); 4420 SCTP_DECR_ASOC_COUNT(); 4421 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4422 *error = EINVAL; 4423 return (NULL); 4424 } 4425 SCTP_TCB_LOCK(stcb); 4426 4427 /* now that my_vtag is set, add it to the hash */ 4428 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4429 /* put it in the bucket in the vtag hash of assoc's for the system */ 4430 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4431 SCTP_INP_INFO_WUNLOCK(); 4432 4433 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4434 /* failure.. memory error? */ 4435 if (asoc->strmout) { 4436 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4437 asoc->strmout = NULL; 4438 } 4439 if (asoc->mapping_array) { 4440 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4441 asoc->mapping_array = NULL; 4442 } 4443 if (asoc->nr_mapping_array) { 4444 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4445 asoc->nr_mapping_array = NULL; 4446 } 4447 SCTP_DECR_ASOC_COUNT(); 4448 SCTP_TCB_LOCK_DESTROY(stcb); 4449 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4450 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4451 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4452 SCTP_INP_WUNLOCK(inp); 4453 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4454 *error = ENOBUFS; 4455 return (NULL); 4456 } 4457 /* Init all the timers */ 4458 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4459 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4460 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4461 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4462 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4463 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4464 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4465 4466 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4467 /* now file the port under the hash as well */ 4468 if (inp->sctp_tcbhash != NULL) { 4469 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4470 inp->sctp_hashmark)]; 4471 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4472 } 4473 SCTP_INP_WUNLOCK(inp); 4474 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4475 return (stcb); 4476 } 4477 4478 4479 void 4480 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4481 { 4482 struct sctp_association *asoc; 4483 4484 asoc = &stcb->asoc; 4485 asoc->numnets--; 4486 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4487 if (net == asoc->primary_destination) { 4488 /* Reset primary */ 4489 struct sctp_nets *lnet; 4490 4491 lnet = TAILQ_FIRST(&asoc->nets); 4492 /* 4493 * Mobility adaptation Ideally, if deleted destination is 4494 * the primary, it becomes a fast retransmission trigger by 4495 * the subsequent SET PRIMARY. (by micchie) 4496 */ 4497 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4498 SCTP_MOBILITY_BASE) || 4499 sctp_is_mobility_feature_on(stcb->sctp_ep, 4500 SCTP_MOBILITY_FASTHANDOFF)) { 4501 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4502 if (asoc->deleted_primary != NULL) { 4503 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4504 goto out; 4505 } 4506 asoc->deleted_primary = net; 4507 atomic_add_int(&net->ref_count, 1); 4508 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4509 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4510 sctp_mobility_feature_on(stcb->sctp_ep, 4511 SCTP_MOBILITY_PRIM_DELETED); 4512 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4513 stcb->sctp_ep, stcb, NULL); 4514 } 4515 out: 4516 /* Try to find a confirmed primary */ 4517 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4518 } 4519 if (net == asoc->last_data_chunk_from) { 4520 /* Reset primary */ 4521 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4522 } 4523 if (net == asoc->last_control_chunk_from) { 4524 /* Clear net */ 4525 asoc->last_control_chunk_from = NULL; 4526 } 4527 if (net == stcb->asoc.alternate) { 4528 sctp_free_remote_addr(stcb->asoc.alternate); 4529 stcb->asoc.alternate = NULL; 4530 } 4531 sctp_free_remote_addr(net); 4532 } 4533 4534 /* 4535 * remove a remote endpoint address from an association, it will fail if the 4536 * address does not exist. 4537 */ 4538 int 4539 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4540 { 4541 /* 4542 * Here we need to remove a remote address. This is quite simple, we 4543 * first find it in the list of address for the association 4544 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4545 * on that item. Note we do not allow it to be removed if there are 4546 * no other addresses. 4547 */ 4548 struct sctp_association *asoc; 4549 struct sctp_nets *net, *nnet; 4550 4551 asoc = &stcb->asoc; 4552 4553 /* locate the address */ 4554 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4555 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4556 continue; 4557 } 4558 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4559 remaddr)) { 4560 /* we found the guy */ 4561 if (asoc->numnets < 2) { 4562 /* Must have at LEAST two remote addresses */ 4563 return (-1); 4564 } else { 4565 sctp_remove_net(stcb, net); 4566 return (0); 4567 } 4568 } 4569 } 4570 /* not found. */ 4571 return (-2); 4572 } 4573 4574 void 4575 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4576 { 4577 struct sctpvtaghead *chain; 4578 struct sctp_tagblock *twait_block; 4579 int found = 0; 4580 int i; 4581 4582 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4583 if (!LIST_EMPTY(chain)) { 4584 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4585 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4586 if ((twait_block->vtag_block[i].v_tag == tag) && 4587 (twait_block->vtag_block[i].lport == lport) && 4588 (twait_block->vtag_block[i].rport == rport)) { 4589 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4590 twait_block->vtag_block[i].v_tag = 0; 4591 twait_block->vtag_block[i].lport = 0; 4592 twait_block->vtag_block[i].rport = 0; 4593 found = 1; 4594 break; 4595 } 4596 } 4597 if (found) 4598 break; 4599 } 4600 } 4601 } 4602 4603 int 4604 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4605 { 4606 struct sctpvtaghead *chain; 4607 struct sctp_tagblock *twait_block; 4608 int found = 0; 4609 int i; 4610 4611 SCTP_INP_INFO_WLOCK(); 4612 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4613 if (!LIST_EMPTY(chain)) { 4614 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4615 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4616 if ((twait_block->vtag_block[i].v_tag == tag) && 4617 (twait_block->vtag_block[i].lport == lport) && 4618 (twait_block->vtag_block[i].rport == rport)) { 4619 found = 1; 4620 break; 4621 } 4622 } 4623 if (found) 4624 break; 4625 } 4626 } 4627 SCTP_INP_INFO_WUNLOCK(); 4628 return (found); 4629 } 4630 4631 4632 void 4633 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4634 { 4635 struct sctpvtaghead *chain; 4636 struct sctp_tagblock *twait_block; 4637 struct timeval now; 4638 int set, i; 4639 4640 if (time == 0) { 4641 /* Its disabled */ 4642 return; 4643 } 4644 (void)SCTP_GETTIME_TIMEVAL(&now); 4645 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4646 set = 0; 4647 if (!LIST_EMPTY(chain)) { 4648 /* Block(s) present, lets find space, and expire on the fly */ 4649 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4650 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4651 if ((twait_block->vtag_block[i].v_tag == 0) && 4652 !set) { 4653 twait_block->vtag_block[i].tv_sec_at_expire = 4654 now.tv_sec + time; 4655 twait_block->vtag_block[i].v_tag = tag; 4656 twait_block->vtag_block[i].lport = lport; 4657 twait_block->vtag_block[i].rport = rport; 4658 set = 1; 4659 } else if ((twait_block->vtag_block[i].v_tag) && 4660 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4661 /* Audit expires this guy */ 4662 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4663 twait_block->vtag_block[i].v_tag = 0; 4664 twait_block->vtag_block[i].lport = 0; 4665 twait_block->vtag_block[i].rport = 0; 4666 if (set == 0) { 4667 /* Reuse it for my new tag */ 4668 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4669 twait_block->vtag_block[i].v_tag = tag; 4670 twait_block->vtag_block[i].lport = lport; 4671 twait_block->vtag_block[i].rport = rport; 4672 set = 1; 4673 } 4674 } 4675 } 4676 if (set) { 4677 /* 4678 * We only do up to the block where we can 4679 * place our tag for audits 4680 */ 4681 break; 4682 } 4683 } 4684 } 4685 /* Need to add a new block to chain */ 4686 if (!set) { 4687 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4688 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4689 if (twait_block == NULL) { 4690 #ifdef INVARIANTS 4691 panic("Can not alloc tagblock"); 4692 #endif 4693 return; 4694 } 4695 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4696 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4697 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4698 twait_block->vtag_block[0].v_tag = tag; 4699 twait_block->vtag_block[0].lport = lport; 4700 twait_block->vtag_block[0].rport = rport; 4701 } 4702 } 4703 4704 4705 4706 /*- 4707 * Free the association after un-hashing the remote port. This 4708 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4709 * expect that the input to this function IS a locked TCB. 4710 * It will return 0, if it did NOT destroy the association (instead 4711 * it unlocks it. It will return NON-zero if it either destroyed the 4712 * association OR the association is already destroyed. 4713 */ 4714 int 4715 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4716 { 4717 int i; 4718 struct sctp_association *asoc; 4719 struct sctp_nets *net, *nnet; 4720 struct sctp_laddr *laddr, *naddr; 4721 struct sctp_tmit_chunk *chk, *nchk; 4722 struct sctp_asconf_addr *aparam, *naparam; 4723 struct sctp_asconf_ack *aack, *naack; 4724 struct sctp_stream_reset_list *strrst, *nstrrst; 4725 struct sctp_queued_to_read *sq, *nsq; 4726 struct sctp_stream_queue_pending *sp, *nsp; 4727 sctp_sharedkey_t *shared_key, *nshared_key; 4728 struct socket *so; 4729 4730 /* first, lets purge the entry from the hash table. */ 4731 4732 #ifdef SCTP_LOG_CLOSING 4733 sctp_log_closing(inp, stcb, 6); 4734 #endif 4735 if (stcb->asoc.state == 0) { 4736 #ifdef SCTP_LOG_CLOSING 4737 sctp_log_closing(inp, NULL, 7); 4738 #endif 4739 /* there is no asoc, really TSNH :-0 */ 4740 return (1); 4741 } 4742 if (stcb->asoc.alternate) { 4743 sctp_free_remote_addr(stcb->asoc.alternate); 4744 stcb->asoc.alternate = NULL; 4745 } 4746 /* TEMP CODE */ 4747 if (stcb->freed_from_where == 0) { 4748 /* Only record the first place free happened from */ 4749 stcb->freed_from_where = from_location; 4750 } 4751 /* TEMP CODE */ 4752 4753 asoc = &stcb->asoc; 4754 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4755 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4756 /* nothing around */ 4757 so = NULL; 4758 else 4759 so = inp->sctp_socket; 4760 4761 /* 4762 * We used timer based freeing if a reader or writer is in the way. 4763 * So we first check if we are actually being called from a timer, 4764 * if so we abort early if a reader or writer is still in the way. 4765 */ 4766 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4767 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4768 /* 4769 * is it the timer driving us? if so are the reader/writers 4770 * gone? 4771 */ 4772 if (stcb->asoc.refcnt) { 4773 /* nope, reader or writer in the way */ 4774 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4775 /* no asoc destroyed */ 4776 SCTP_TCB_UNLOCK(stcb); 4777 #ifdef SCTP_LOG_CLOSING 4778 sctp_log_closing(inp, stcb, 8); 4779 #endif 4780 return (0); 4781 } 4782 } 4783 /* now clean up any other timers */ 4784 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4785 asoc->dack_timer.self = NULL; 4786 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4787 /*- 4788 * For stream reset we don't blast this unless 4789 * it is a str-reset timer, it might be the 4790 * free-asoc timer which we DON'T want to 4791 * disturb. 4792 */ 4793 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4794 asoc->strreset_timer.self = NULL; 4795 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4796 asoc->asconf_timer.self = NULL; 4797 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4798 asoc->autoclose_timer.self = NULL; 4799 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4800 asoc->shut_guard_timer.self = NULL; 4801 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4802 asoc->delayed_event_timer.self = NULL; 4803 /* Mobility adaptation */ 4804 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4805 asoc->delete_prim_timer.self = NULL; 4806 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4807 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4808 net->rxt_timer.self = NULL; 4809 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4810 net->pmtu_timer.self = NULL; 4811 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4812 net->hb_timer.self = NULL; 4813 } 4814 /* Now the read queue needs to be cleaned up (only once) */ 4815 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4816 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4817 SCTP_INP_READ_LOCK(inp); 4818 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4819 if (sq->stcb == stcb) { 4820 sq->do_not_ref_stcb = 1; 4821 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4822 /* 4823 * If there is no end, there never will be 4824 * now. 4825 */ 4826 if (sq->end_added == 0) { 4827 /* Held for PD-API clear that. */ 4828 sq->pdapi_aborted = 1; 4829 sq->held_length = 0; 4830 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4831 /* 4832 * Need to add a PD-API 4833 * aborted indication. 4834 * Setting the control_pdapi 4835 * assures that it will be 4836 * added right after this 4837 * msg. 4838 */ 4839 uint32_t strseq; 4840 4841 stcb->asoc.control_pdapi = sq; 4842 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4843 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4844 stcb, 4845 SCTP_PARTIAL_DELIVERY_ABORTED, 4846 (void *)&strseq, 4847 SCTP_SO_LOCKED); 4848 stcb->asoc.control_pdapi = NULL; 4849 } 4850 } 4851 /* Add an end to wake them */ 4852 sq->end_added = 1; 4853 } 4854 } 4855 SCTP_INP_READ_UNLOCK(inp); 4856 if (stcb->block_entry) { 4857 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4858 stcb->block_entry->error = ECONNRESET; 4859 stcb->block_entry = NULL; 4860 } 4861 } 4862 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4863 /* 4864 * Someone holds a reference OR the socket is unaccepted 4865 * yet. 4866 */ 4867 if ((stcb->asoc.refcnt) || 4868 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4869 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4870 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4871 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4872 } 4873 SCTP_TCB_UNLOCK(stcb); 4874 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4875 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4876 /* nothing around */ 4877 so = NULL; 4878 if (so) { 4879 /* Wake any reader/writers */ 4880 sctp_sorwakeup(inp, so); 4881 sctp_sowwakeup(inp, so); 4882 } 4883 #ifdef SCTP_LOG_CLOSING 4884 sctp_log_closing(inp, stcb, 9); 4885 #endif 4886 /* no asoc destroyed */ 4887 return (0); 4888 } 4889 #ifdef SCTP_LOG_CLOSING 4890 sctp_log_closing(inp, stcb, 10); 4891 #endif 4892 /* 4893 * When I reach here, no others want to kill the assoc yet.. and I 4894 * own the lock. Now its possible an abort comes in when I do the 4895 * lock exchange below to grab all the locks to do the final take 4896 * out. to prevent this we increment the count, which will start a 4897 * timer and blow out above thus assuring us that we hold exclusive 4898 * killing of the asoc. Note that after getting back the TCB lock we 4899 * will go ahead and increment the counter back up and stop any 4900 * timer a passing stranger may have started :-S 4901 */ 4902 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4903 atomic_add_int(&stcb->asoc.refcnt, 1); 4904 4905 SCTP_TCB_UNLOCK(stcb); 4906 SCTP_INP_INFO_WLOCK(); 4907 SCTP_INP_WLOCK(inp); 4908 SCTP_TCB_LOCK(stcb); 4909 } 4910 /* Double check the GONE flag */ 4911 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4912 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4913 /* nothing around */ 4914 so = NULL; 4915 4916 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4917 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4918 /* 4919 * For TCP type we need special handling when we are 4920 * connected. We also include the peel'ed off ones to. 4921 */ 4922 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4923 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4924 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4925 if (so) { 4926 SOCK_LOCK(so); 4927 if (so->so_rcv.sb_cc == 0) { 4928 so->so_state &= ~(SS_ISCONNECTING | 4929 SS_ISDISCONNECTING | 4930 SS_ISCONFIRMING | 4931 SS_ISCONNECTED); 4932 } 4933 socantrcvmore_locked(so); 4934 sctp_sowwakeup(inp, so); 4935 sctp_sorwakeup(inp, so); 4936 SCTP_SOWAKEUP(so); 4937 } 4938 } 4939 } 4940 /* 4941 * Make it invalid too, that way if its about to run it will abort 4942 * and return. 4943 */ 4944 /* re-increment the lock */ 4945 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4946 atomic_add_int(&stcb->asoc.refcnt, -1); 4947 } 4948 if (stcb->asoc.refcnt) { 4949 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4950 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4951 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4952 SCTP_INP_INFO_WUNLOCK(); 4953 SCTP_INP_WUNLOCK(inp); 4954 } 4955 SCTP_TCB_UNLOCK(stcb); 4956 return (0); 4957 } 4958 asoc->state = 0; 4959 if (inp->sctp_tcbhash) { 4960 LIST_REMOVE(stcb, sctp_tcbhash); 4961 } 4962 if (stcb->asoc.in_asocid_hash) { 4963 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4964 } 4965 /* Now lets remove it from the list of ALL associations in the EP */ 4966 LIST_REMOVE(stcb, sctp_tcblist); 4967 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4968 SCTP_INP_INCR_REF(inp); 4969 SCTP_INP_WUNLOCK(inp); 4970 } 4971 /* pull from vtag hash */ 4972 LIST_REMOVE(stcb, sctp_asocs); 4973 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4974 inp->sctp_lport, stcb->rport); 4975 4976 /* 4977 * Now restop the timers to be sure this is paranoia at is finest! 4978 */ 4979 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4980 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4981 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4982 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4983 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4984 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4985 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4986 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4987 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4988 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4989 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4990 } 4991 4992 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4993 /* 4994 * The chunk lists and such SHOULD be empty but we check them just 4995 * in case. 4996 */ 4997 /* anything on the wheel needs to be removed */ 4998 for (i = 0; i < asoc->streamoutcnt; i++) { 4999 struct sctp_stream_out *outs; 5000 5001 outs = &asoc->strmout[i]; 5002 /* now clean up any chunks here */ 5003 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 5004 TAILQ_REMOVE(&outs->outqueue, sp, next); 5005 if (sp->data) { 5006 if (so) { 5007 /* Still an open socket - report */ 5008 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 5009 SCTP_NOTIFY_DATAGRAM_UNSENT, 5010 (void *)sp, SCTP_SO_LOCKED); 5011 } 5012 if (sp->data) { 5013 sctp_m_freem(sp->data); 5014 sp->data = NULL; 5015 sp->tail_mbuf = NULL; 5016 } 5017 } 5018 if (sp->net) { 5019 sctp_free_remote_addr(sp->net); 5020 sp->net = NULL; 5021 } 5022 sctp_free_spbufspace(stcb, asoc, sp); 5023 if (sp->holds_key_ref) 5024 sctp_auth_key_release(stcb, sp->auth_keyid, SCTP_SO_LOCKED); 5025 /* Free the zone stuff */ 5026 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 5027 SCTP_DECR_STRMOQ_COUNT(); 5028 /* sa_ignore FREED_MEMORY */ 5029 } 5030 } 5031 /* sa_ignore FREED_MEMORY */ 5032 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 5033 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 5034 SCTP_FREE(strrst, SCTP_M_STRESET); 5035 } 5036 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 5037 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 5038 if (sq->data) { 5039 sctp_m_freem(sq->data); 5040 sq->data = NULL; 5041 } 5042 sctp_free_remote_addr(sq->whoFrom); 5043 sq->whoFrom = NULL; 5044 sq->stcb = NULL; 5045 /* Free the ctl entry */ 5046 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 5047 SCTP_DECR_READQ_COUNT(); 5048 /* sa_ignore FREED_MEMORY */ 5049 } 5050 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 5051 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 5052 if (chk->data) { 5053 sctp_m_freem(chk->data); 5054 chk->data = NULL; 5055 } 5056 if (chk->holds_key_ref) 5057 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5058 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5059 SCTP_DECR_CHK_COUNT(); 5060 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5061 asoc->free_chunk_cnt--; 5062 /* sa_ignore FREED_MEMORY */ 5063 } 5064 /* pending send queue SHOULD be empty */ 5065 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5066 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5067 if (chk->data) { 5068 if (so) { 5069 /* Still a socket? */ 5070 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 5071 SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED); 5072 } 5073 if (chk->data) { 5074 sctp_m_freem(chk->data); 5075 chk->data = NULL; 5076 } 5077 } 5078 if (chk->holds_key_ref) 5079 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5080 if (chk->whoTo) { 5081 sctp_free_remote_addr(chk->whoTo); 5082 chk->whoTo = NULL; 5083 } 5084 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5085 SCTP_DECR_CHK_COUNT(); 5086 /* sa_ignore FREED_MEMORY */ 5087 } 5088 /* sent queue SHOULD be empty */ 5089 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5090 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5091 if (chk->data) { 5092 if (so) { 5093 /* Still a socket? */ 5094 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 5095 SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED); 5096 } 5097 if (chk->data) { 5098 sctp_m_freem(chk->data); 5099 chk->data = NULL; 5100 } 5101 } 5102 if (chk->holds_key_ref) 5103 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5104 sctp_free_remote_addr(chk->whoTo); 5105 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5106 SCTP_DECR_CHK_COUNT(); 5107 /* sa_ignore FREED_MEMORY */ 5108 } 5109 /* control queue MAY not be empty */ 5110 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5111 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5112 if (chk->data) { 5113 sctp_m_freem(chk->data); 5114 chk->data = NULL; 5115 } 5116 if (chk->holds_key_ref) 5117 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5118 sctp_free_remote_addr(chk->whoTo); 5119 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5120 SCTP_DECR_CHK_COUNT(); 5121 /* sa_ignore FREED_MEMORY */ 5122 } 5123 /* ASCONF queue MAY not be empty */ 5124 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5125 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5126 if (chk->data) { 5127 sctp_m_freem(chk->data); 5128 chk->data = NULL; 5129 } 5130 if (chk->holds_key_ref) 5131 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5132 sctp_free_remote_addr(chk->whoTo); 5133 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5134 SCTP_DECR_CHK_COUNT(); 5135 /* sa_ignore FREED_MEMORY */ 5136 } 5137 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5138 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5139 if (chk->data) { 5140 sctp_m_freem(chk->data); 5141 chk->data = NULL; 5142 } 5143 if (chk->holds_key_ref) 5144 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5145 sctp_free_remote_addr(chk->whoTo); 5146 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5147 SCTP_DECR_CHK_COUNT(); 5148 /* sa_ignore FREED_MEMORY */ 5149 } 5150 5151 if (asoc->mapping_array) { 5152 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5153 asoc->mapping_array = NULL; 5154 } 5155 if (asoc->nr_mapping_array) { 5156 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5157 asoc->nr_mapping_array = NULL; 5158 } 5159 /* the stream outs */ 5160 if (asoc->strmout) { 5161 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5162 asoc->strmout = NULL; 5163 } 5164 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5165 if (asoc->strmin) { 5166 struct sctp_queued_to_read *ctl, *nctl; 5167 5168 for (i = 0; i < asoc->streamincnt; i++) { 5169 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5170 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5171 sctp_free_remote_addr(ctl->whoFrom); 5172 if (ctl->data) { 5173 sctp_m_freem(ctl->data); 5174 ctl->data = NULL; 5175 } 5176 /* 5177 * We don't free the address here since all 5178 * the net's were freed above. 5179 */ 5180 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5181 SCTP_DECR_READQ_COUNT(); 5182 } 5183 } 5184 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5185 asoc->strmin = NULL; 5186 } 5187 asoc->streamincnt = 0; 5188 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5189 #ifdef INVARIANTS 5190 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5191 panic("no net's left alloc'ed, or list points to itself"); 5192 } 5193 #endif 5194 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5195 sctp_free_remote_addr(net); 5196 } 5197 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5198 /* sa_ignore FREED_MEMORY */ 5199 sctp_remove_laddr(laddr); 5200 } 5201 5202 /* pending asconf (address) parameters */ 5203 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5204 /* sa_ignore FREED_MEMORY */ 5205 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5206 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5207 } 5208 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5209 /* sa_ignore FREED_MEMORY */ 5210 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5211 if (aack->data != NULL) { 5212 sctp_m_freem(aack->data); 5213 } 5214 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5215 } 5216 /* clean up auth stuff */ 5217 if (asoc->local_hmacs) 5218 sctp_free_hmaclist(asoc->local_hmacs); 5219 if (asoc->peer_hmacs) 5220 sctp_free_hmaclist(asoc->peer_hmacs); 5221 5222 if (asoc->local_auth_chunks) 5223 sctp_free_chunklist(asoc->local_auth_chunks); 5224 if (asoc->peer_auth_chunks) 5225 sctp_free_chunklist(asoc->peer_auth_chunks); 5226 5227 sctp_free_authinfo(&asoc->authinfo); 5228 5229 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5230 LIST_REMOVE(shared_key, next); 5231 sctp_free_sharedkey(shared_key); 5232 /* sa_ignore FREED_MEMORY */ 5233 } 5234 5235 /* Insert new items here :> */ 5236 5237 /* Get rid of LOCK */ 5238 SCTP_TCB_LOCK_DESTROY(stcb); 5239 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5240 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5241 SCTP_INP_INFO_WUNLOCK(); 5242 SCTP_INP_RLOCK(inp); 5243 } 5244 #ifdef SCTP_TRACK_FREED_ASOCS 5245 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5246 /* now clean up the tasoc itself */ 5247 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5248 SCTP_DECR_ASOC_COUNT(); 5249 } else { 5250 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5251 } 5252 #else 5253 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5254 SCTP_DECR_ASOC_COUNT(); 5255 #endif 5256 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5257 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5258 /* 5259 * If its NOT the inp_free calling us AND sctp_close 5260 * as been called, we call back... 5261 */ 5262 SCTP_INP_RUNLOCK(inp); 5263 /* 5264 * This will start the kill timer (if we are the 5265 * last one) since we hold an increment yet. But 5266 * this is the only safe way to do this since 5267 * otherwise if the socket closes at the same time 5268 * we are here we might collide in the cleanup. 5269 */ 5270 sctp_inpcb_free(inp, 5271 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5272 SCTP_CALLED_DIRECTLY_NOCMPSET); 5273 SCTP_INP_DECR_REF(inp); 5274 goto out_of; 5275 } else { 5276 /* The socket is still open. */ 5277 SCTP_INP_DECR_REF(inp); 5278 } 5279 } 5280 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5281 SCTP_INP_RUNLOCK(inp); 5282 } 5283 out_of: 5284 /* destroyed the asoc */ 5285 #ifdef SCTP_LOG_CLOSING 5286 sctp_log_closing(inp, NULL, 11); 5287 #endif 5288 return (1); 5289 } 5290 5291 5292 5293 /* 5294 * determine if a destination is "reachable" based upon the addresses bound 5295 * to the current endpoint (e.g. only v4 or v6 currently bound) 5296 */ 5297 /* 5298 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5299 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5300 * types bound as its endpoint 5301 */ 5302 int 5303 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5304 { 5305 struct sctp_inpcb *inp; 5306 int answer; 5307 5308 /* 5309 * No locks here, the TCB, in all cases is already locked and an 5310 * assoc is up. There is either a INP lock by the caller applied (in 5311 * asconf case when deleting an address) or NOT in the HB case, 5312 * however if HB then the INP increment is up and the INP will not 5313 * be removed (on top of the fact that we have a TCB lock). So we 5314 * only want to read the sctp_flags, which is either bound-all or 5315 * not.. no protection needed since once an assoc is up you can't be 5316 * changing your binding. 5317 */ 5318 inp = stcb->sctp_ep; 5319 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5320 /* if bound all, destination is not restricted */ 5321 /* 5322 * RRS: Question during lock work: Is this correct? If you 5323 * are bound-all you still might need to obey the V4--V6 5324 * flags??? IMO this bound-all stuff needs to be removed! 5325 */ 5326 return (1); 5327 } 5328 /* NOTE: all "scope" checks are done when local addresses are added */ 5329 switch (destaddr->sa_family) { 5330 case AF_INET6: 5331 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5332 break; 5333 case AF_INET: 5334 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5335 break; 5336 default: 5337 /* invalid family, so it's unreachable */ 5338 answer = 0; 5339 break; 5340 } 5341 return (answer); 5342 } 5343 5344 /* 5345 * update the inp_vflags on an endpoint 5346 */ 5347 static void 5348 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5349 { 5350 struct sctp_laddr *laddr; 5351 5352 /* first clear the flag */ 5353 inp->ip_inp.inp.inp_vflag = 0; 5354 /* set the flag based on addresses on the ep list */ 5355 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5356 if (laddr->ifa == NULL) { 5357 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5358 __FUNCTION__); 5359 continue; 5360 } 5361 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5362 continue; 5363 } 5364 switch (laddr->ifa->address.sa.sa_family) { 5365 #ifdef INET6 5366 case AF_INET6: 5367 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5368 break; 5369 #endif 5370 #ifdef INET 5371 case AF_INET: 5372 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5373 break; 5374 #endif 5375 default: 5376 break; 5377 } 5378 } 5379 } 5380 5381 /* 5382 * Add the address to the endpoint local address list There is nothing to be 5383 * done if we are bound to all addresses 5384 */ 5385 void 5386 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5387 { 5388 struct sctp_laddr *laddr; 5389 int fnd, error = 0; 5390 5391 fnd = 0; 5392 5393 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5394 /* You are already bound to all. You have it already */ 5395 return; 5396 } 5397 #ifdef INET6 5398 if (ifa->address.sa.sa_family == AF_INET6) { 5399 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5400 /* Can't bind a non-useable addr. */ 5401 return; 5402 } 5403 } 5404 #endif 5405 /* first, is it already present? */ 5406 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5407 if (laddr->ifa == ifa) { 5408 fnd = 1; 5409 break; 5410 } 5411 } 5412 5413 if (fnd == 0) { 5414 /* Not in the ep list */ 5415 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5416 if (error != 0) 5417 return; 5418 inp->laddr_count++; 5419 /* update inp_vflag flags */ 5420 switch (ifa->address.sa.sa_family) { 5421 #ifdef INET6 5422 case AF_INET6: 5423 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5424 break; 5425 #endif 5426 #ifdef INET6 5427 case AF_INET: 5428 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5429 break; 5430 #endif 5431 default: 5432 break; 5433 } 5434 } 5435 return; 5436 } 5437 5438 5439 /* 5440 * select a new (hopefully reachable) destination net (should only be used 5441 * when we deleted an ep addr that is the only usable source address to reach 5442 * the destination net) 5443 */ 5444 static void 5445 sctp_select_primary_destination(struct sctp_tcb *stcb) 5446 { 5447 struct sctp_nets *net; 5448 5449 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5450 /* for now, we'll just pick the first reachable one we find */ 5451 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5452 continue; 5453 if (sctp_destination_is_reachable(stcb, 5454 (struct sockaddr *)&net->ro._l_addr)) { 5455 /* found a reachable destination */ 5456 stcb->asoc.primary_destination = net; 5457 } 5458 } 5459 /* I can't there from here! ...we're gonna die shortly... */ 5460 } 5461 5462 5463 /* 5464 * Delete the address from the endpoint local address list There is nothing 5465 * to be done if we are bound to all addresses 5466 */ 5467 void 5468 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5469 { 5470 struct sctp_laddr *laddr; 5471 int fnd; 5472 5473 fnd = 0; 5474 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5475 /* You are already bound to all. You have it already */ 5476 return; 5477 } 5478 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5479 if (laddr->ifa == ifa) { 5480 fnd = 1; 5481 break; 5482 } 5483 } 5484 if (fnd && (inp->laddr_count < 2)) { 5485 /* can't delete unless there are at LEAST 2 addresses */ 5486 return; 5487 } 5488 if (fnd) { 5489 /* 5490 * clean up any use of this address go through our 5491 * associations and clear any last_used_address that match 5492 * this one for each assoc, see if a new primary_destination 5493 * is needed 5494 */ 5495 struct sctp_tcb *stcb; 5496 5497 /* clean up "next_addr_touse" */ 5498 if (inp->next_addr_touse == laddr) 5499 /* delete this address */ 5500 inp->next_addr_touse = NULL; 5501 5502 /* clean up "last_used_address" */ 5503 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5504 struct sctp_nets *net; 5505 5506 SCTP_TCB_LOCK(stcb); 5507 if (stcb->asoc.last_used_address == laddr) 5508 /* delete this address */ 5509 stcb->asoc.last_used_address = NULL; 5510 /* 5511 * Now spin through all the nets and purge any ref 5512 * to laddr 5513 */ 5514 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5515 if (net->ro._s_addr && 5516 (net->ro._s_addr->ifa == laddr->ifa)) { 5517 /* Yep, purge src address selected */ 5518 sctp_rtentry_t *rt; 5519 5520 /* delete this address if cached */ 5521 rt = net->ro.ro_rt; 5522 if (rt != NULL) { 5523 RTFREE(rt); 5524 net->ro.ro_rt = NULL; 5525 } 5526 sctp_free_ifa(net->ro._s_addr); 5527 net->ro._s_addr = NULL; 5528 net->src_addr_selected = 0; 5529 } 5530 } 5531 SCTP_TCB_UNLOCK(stcb); 5532 } /* for each tcb */ 5533 /* remove it from the ep list */ 5534 sctp_remove_laddr(laddr); 5535 inp->laddr_count--; 5536 /* update inp_vflag flags */ 5537 sctp_update_ep_vflag(inp); 5538 } 5539 return; 5540 } 5541 5542 /* 5543 * Add the address to the TCB local address restricted list. 5544 * This is a "pending" address list (eg. addresses waiting for an 5545 * ASCONF-ACK response) and cannot be used as a valid source address. 5546 */ 5547 void 5548 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5549 { 5550 struct sctp_inpcb *inp; 5551 struct sctp_laddr *laddr; 5552 struct sctpladdr *list; 5553 5554 /* 5555 * Assumes TCB is locked.. and possibly the INP. May need to 5556 * confirm/fix that if we need it and is not the case. 5557 */ 5558 list = &stcb->asoc.sctp_restricted_addrs; 5559 5560 inp = stcb->sctp_ep; 5561 #ifdef INET6 5562 if (ifa->address.sa.sa_family == AF_INET6) { 5563 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5564 /* Can't bind a non-existent addr. */ 5565 return; 5566 } 5567 } 5568 #endif 5569 /* does the address already exist? */ 5570 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5571 if (laddr->ifa == ifa) { 5572 return; 5573 } 5574 } 5575 5576 /* add to the list */ 5577 (void)sctp_insert_laddr(list, ifa, 0); 5578 return; 5579 } 5580 5581 /* 5582 * insert an laddr entry with the given ifa for the desired list 5583 */ 5584 int 5585 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5586 { 5587 struct sctp_laddr *laddr; 5588 5589 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5590 if (laddr == NULL) { 5591 /* out of memory? */ 5592 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5593 return (EINVAL); 5594 } 5595 SCTP_INCR_LADDR_COUNT(); 5596 bzero(laddr, sizeof(*laddr)); 5597 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5598 laddr->ifa = ifa; 5599 laddr->action = act; 5600 atomic_add_int(&ifa->refcount, 1); 5601 /* insert it */ 5602 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5603 5604 return (0); 5605 } 5606 5607 /* 5608 * Remove an laddr entry from the local address list (on an assoc) 5609 */ 5610 void 5611 sctp_remove_laddr(struct sctp_laddr *laddr) 5612 { 5613 5614 /* remove from the list */ 5615 LIST_REMOVE(laddr, sctp_nxt_addr); 5616 sctp_free_ifa(laddr->ifa); 5617 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5618 SCTP_DECR_LADDR_COUNT(); 5619 } 5620 5621 /* 5622 * Remove a local address from the TCB local address restricted list 5623 */ 5624 void 5625 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5626 { 5627 struct sctp_inpcb *inp; 5628 struct sctp_laddr *laddr; 5629 5630 /* 5631 * This is called by asconf work. It is assumed that a) The TCB is 5632 * locked and b) The INP is locked. This is true in as much as I can 5633 * trace through the entry asconf code where I did these locks. 5634 * Again, the ASCONF code is a bit different in that it does lock 5635 * the INP during its work often times. This must be since we don't 5636 * want other proc's looking up things while what they are looking 5637 * up is changing :-D 5638 */ 5639 5640 inp = stcb->sctp_ep; 5641 /* if subset bound and don't allow ASCONF's, can't delete last */ 5642 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5643 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5644 if (stcb->sctp_ep->laddr_count < 2) { 5645 /* can't delete last address */ 5646 return; 5647 } 5648 } 5649 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5650 /* remove the address if it exists */ 5651 if (laddr->ifa == NULL) 5652 continue; 5653 if (laddr->ifa == ifa) { 5654 sctp_remove_laddr(laddr); 5655 return; 5656 } 5657 } 5658 5659 /* address not found! */ 5660 return; 5661 } 5662 5663 /* 5664 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5665 */ 5666 /* sysctl */ 5667 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5668 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5669 5670 5671 5672 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5673 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5674 int *sctp_cpuarry = NULL; 5675 void 5676 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5677 { 5678 /* Queue a packet to a processor for the specified core */ 5679 struct sctp_mcore_queue *qent; 5680 struct sctp_mcore_ctrl *wkq; 5681 int need_wake = 0; 5682 5683 if (sctp_mcore_workers == NULL) { 5684 /* Something went way bad during setup */ 5685 sctp_input_with_port(m, off, 0); 5686 return; 5687 } 5688 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5689 (sizeof(struct sctp_mcore_queue)), 5690 SCTP_M_MCORE); 5691 if (qent == NULL) { 5692 /* This is trouble */ 5693 sctp_input_with_port(m, off, 0); 5694 return; 5695 } 5696 qent->vn = curvnet; 5697 qent->m = m; 5698 qent->off = off; 5699 qent->v6 = 0; 5700 wkq = &sctp_mcore_workers[cpu_to_use]; 5701 SCTP_MCORE_QLOCK(wkq); 5702 5703 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5704 if (wkq->running == 0) { 5705 need_wake = 1; 5706 } 5707 SCTP_MCORE_QUNLOCK(wkq); 5708 if (need_wake) { 5709 wakeup(&wkq->running); 5710 } 5711 } 5712 5713 static void 5714 sctp_mcore_thread(void *arg) 5715 { 5716 5717 struct sctp_mcore_ctrl *wkq; 5718 struct sctp_mcore_queue *qent; 5719 5720 wkq = (struct sctp_mcore_ctrl *)arg; 5721 struct mbuf *m; 5722 int off, v6; 5723 5724 /* Wait for first tickle */ 5725 SCTP_MCORE_LOCK(wkq); 5726 wkq->running = 0; 5727 msleep(&wkq->running, 5728 &wkq->core_mtx, 5729 0, "wait for pkt", 0); 5730 SCTP_MCORE_UNLOCK(wkq); 5731 5732 /* Bind to our cpu */ 5733 thread_lock(curthread); 5734 sched_bind(curthread, wkq->cpuid); 5735 thread_unlock(curthread); 5736 5737 /* Now lets start working */ 5738 SCTP_MCORE_LOCK(wkq); 5739 /* Now grab lock and go */ 5740 while (1) { 5741 SCTP_MCORE_QLOCK(wkq); 5742 skip_sleep: 5743 wkq->running = 1; 5744 qent = TAILQ_FIRST(&wkq->que); 5745 if (qent) { 5746 TAILQ_REMOVE(&wkq->que, qent, next); 5747 SCTP_MCORE_QUNLOCK(wkq); 5748 CURVNET_SET(qent->vn); 5749 m = qent->m; 5750 off = qent->off; 5751 v6 = qent->v6; 5752 SCTP_FREE(qent, SCTP_M_MCORE); 5753 if (v6 == 0) { 5754 sctp_input_with_port(m, off, 0); 5755 } else { 5756 printf("V6 not yet supported\n"); 5757 sctp_m_freem(m); 5758 } 5759 CURVNET_RESTORE(); 5760 SCTP_MCORE_QLOCK(wkq); 5761 } 5762 wkq->running = 0; 5763 if (!TAILQ_EMPTY(&wkq->que)) { 5764 goto skip_sleep; 5765 } 5766 SCTP_MCORE_QUNLOCK(wkq); 5767 msleep(&wkq->running, 5768 &wkq->core_mtx, 5769 0, "wait for pkt", 0); 5770 }; 5771 } 5772 5773 static void 5774 sctp_startup_mcore_threads(void) 5775 { 5776 int i, cpu; 5777 5778 if (mp_ncpus == 1) 5779 return; 5780 5781 if (sctp_mcore_workers != NULL) { 5782 /* 5783 * Already been here in some previous vnet? 5784 */ 5785 return; 5786 } 5787 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5788 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5789 SCTP_M_MCORE); 5790 if (sctp_mcore_workers == NULL) { 5791 /* TSNH I hope */ 5792 return; 5793 } 5794 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5795 sizeof(struct sctp_mcore_ctrl))); 5796 /* Init the structures */ 5797 for (i = 0; i <= mp_maxid; i++) { 5798 TAILQ_INIT(&sctp_mcore_workers[i].que); 5799 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5800 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5801 sctp_mcore_workers[i].cpuid = i; 5802 } 5803 if (sctp_cpuarry == NULL) { 5804 SCTP_MALLOC(sctp_cpuarry, int *, 5805 (mp_ncpus * sizeof(int)), 5806 SCTP_M_MCORE); 5807 i = 0; 5808 CPU_FOREACH(cpu) { 5809 sctp_cpuarry[i] = cpu; 5810 i++; 5811 } 5812 } 5813 /* Now start them all */ 5814 CPU_FOREACH(cpu) { 5815 (void)kproc_create(sctp_mcore_thread, 5816 (void *)&sctp_mcore_workers[cpu], 5817 &sctp_mcore_workers[cpu].thread_proc, 5818 RFPROC, 5819 SCTP_KTHREAD_PAGES, 5820 SCTP_MCORE_NAME); 5821 5822 } 5823 } 5824 5825 #endif 5826 5827 void 5828 sctp_pcb_init() 5829 { 5830 /* 5831 * SCTP initialization for the PCB structures should be called by 5832 * the sctp_init() funciton. 5833 */ 5834 int i; 5835 struct timeval tv; 5836 5837 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5838 /* error I was called twice */ 5839 return; 5840 } 5841 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5842 5843 #if defined(SCTP_LOCAL_TRACE_BUF) 5844 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5845 #endif 5846 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5847 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5848 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5849 SCTP_M_MCORE); 5850 #endif 5851 (void)SCTP_GETTIME_TIMEVAL(&tv); 5852 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5853 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5854 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5855 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5856 #else 5857 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5858 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5859 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5860 #endif 5861 /* init the empty list of (All) Endpoints */ 5862 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5863 5864 5865 /* init the hash table of endpoints */ 5866 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5867 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5868 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5869 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5870 &SCTP_BASE_INFO(hashasocmark)); 5871 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5872 &SCTP_BASE_INFO(hashmark)); 5873 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5874 &SCTP_BASE_INFO(hashtcpmark)); 5875 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5876 5877 5878 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5879 &SCTP_BASE_INFO(hashvrfmark)); 5880 5881 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5882 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5883 /* init the zones */ 5884 /* 5885 * FIX ME: Should check for NULL returns, but if it does fail we are 5886 * doomed to panic anyways... add later maybe. 5887 */ 5888 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5889 sizeof(struct sctp_inpcb), maxsockets); 5890 5891 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5892 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5893 5894 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5895 sizeof(struct sctp_laddr), 5896 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5897 5898 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5899 sizeof(struct sctp_nets), 5900 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5901 5902 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5903 sizeof(struct sctp_tmit_chunk), 5904 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5905 5906 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5907 sizeof(struct sctp_queued_to_read), 5908 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5909 5910 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5911 sizeof(struct sctp_stream_queue_pending), 5912 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5913 5914 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5915 sizeof(struct sctp_asconf), 5916 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5917 5918 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5919 sizeof(struct sctp_asconf_ack), 5920 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5921 5922 5923 /* Master Lock INIT for info structure */ 5924 SCTP_INP_INFO_LOCK_INIT(); 5925 SCTP_STATLOG_INIT_LOCK(); 5926 5927 SCTP_IPI_COUNT_INIT(); 5928 SCTP_IPI_ADDR_INIT(); 5929 #ifdef SCTP_PACKET_LOGGING 5930 SCTP_IP_PKTLOG_INIT(); 5931 #endif 5932 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5933 5934 SCTP_WQ_ADDR_INIT(); 5935 /* not sure if we need all the counts */ 5936 SCTP_BASE_INFO(ipi_count_ep) = 0; 5937 /* assoc/tcb zone info */ 5938 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5939 /* local addrlist zone info */ 5940 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5941 /* remote addrlist zone info */ 5942 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5943 /* chunk info */ 5944 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5945 5946 /* socket queue zone info */ 5947 SCTP_BASE_INFO(ipi_count_readq) = 0; 5948 5949 /* stream out queue cont */ 5950 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5951 5952 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5953 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5954 5955 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5956 5957 /* Init the TIMEWAIT list */ 5958 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5959 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5960 } 5961 5962 sctp_startup_iterator(); 5963 5964 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5965 sctp_startup_mcore_threads(); 5966 #endif 5967 5968 /* 5969 * INIT the default VRF which for BSD is the only one, other O/S's 5970 * may have more. But initially they must start with one and then 5971 * add the VRF's as addresses are added. 5972 */ 5973 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5974 } 5975 5976 /* 5977 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5978 */ 5979 void 5980 sctp_pcb_finish(void) 5981 { 5982 struct sctp_vrflist *vrf_bucket; 5983 struct sctp_vrf *vrf, *nvrf; 5984 struct sctp_ifn *ifn, *nifn; 5985 struct sctp_ifa *ifa, *nifa; 5986 struct sctpvtaghead *chain; 5987 struct sctp_tagblock *twait_block, *prev_twait_block; 5988 struct sctp_laddr *wi, *nwi; 5989 int i; 5990 5991 /* 5992 * Free BSD the it thread never exits but we do clean up. The only 5993 * way freebsd reaches here if we have VRF's but we still add the 5994 * ifdef to make it compile on old versions. 5995 */ 5996 { 5997 struct sctp_iterator *it, *nit; 5998 5999 SCTP_IPI_ITERATOR_WQ_LOCK(); 6000 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 6001 if (it->vn != curvnet) { 6002 continue; 6003 } 6004 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6005 if (it->function_atend != NULL) { 6006 (*it->function_atend) (it->pointer, it->val); 6007 } 6008 SCTP_FREE(it, SCTP_M_ITER); 6009 } 6010 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6011 SCTP_ITERATOR_LOCK(); 6012 if ((sctp_it_ctl.cur_it) && 6013 (sctp_it_ctl.cur_it->vn == curvnet)) { 6014 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 6015 } 6016 SCTP_ITERATOR_UNLOCK(); 6017 } 6018 6019 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 6020 SCTP_WQ_ADDR_LOCK(); 6021 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 6022 LIST_REMOVE(wi, sctp_nxt_addr); 6023 SCTP_DECR_LADDR_COUNT(); 6024 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 6025 } 6026 SCTP_WQ_ADDR_UNLOCK(); 6027 6028 /* 6029 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 6030 * destroyed first). 6031 */ 6032 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 6033 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 6034 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 6035 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 6036 /* free the ifa */ 6037 LIST_REMOVE(ifa, next_bucket); 6038 LIST_REMOVE(ifa, next_ifa); 6039 SCTP_FREE(ifa, SCTP_M_IFA); 6040 } 6041 /* free the ifn */ 6042 LIST_REMOVE(ifn, next_bucket); 6043 LIST_REMOVE(ifn, next_ifn); 6044 SCTP_FREE(ifn, SCTP_M_IFN); 6045 } 6046 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 6047 /* free the vrf */ 6048 LIST_REMOVE(vrf, next_vrf); 6049 SCTP_FREE(vrf, SCTP_M_VRF); 6050 } 6051 /* free the vrf hashes */ 6052 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6053 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6054 6055 /* 6056 * free the TIMEWAIT list elements malloc'd in the function 6057 * sctp_add_vtag_to_timewait()... 6058 */ 6059 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6060 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6061 if (!LIST_EMPTY(chain)) { 6062 prev_twait_block = NULL; 6063 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6064 if (prev_twait_block) { 6065 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6066 } 6067 prev_twait_block = twait_block; 6068 } 6069 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6070 } 6071 } 6072 6073 /* free the locks and mutexes */ 6074 #ifdef SCTP_PACKET_LOGGING 6075 SCTP_IP_PKTLOG_DESTROY(); 6076 #endif 6077 SCTP_IPI_ADDR_DESTROY(); 6078 SCTP_STATLOG_DESTROY(); 6079 SCTP_INP_INFO_LOCK_DESTROY(); 6080 6081 SCTP_WQ_ADDR_DESTROY(); 6082 6083 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6084 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6085 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6086 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6087 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6088 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6089 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6090 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6091 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6092 /* Get rid of other stuff to */ 6093 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6094 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6095 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6096 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6097 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6098 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6099 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6100 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6101 #endif 6102 } 6103 6104 6105 int 6106 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6107 int iphlen, int offset, int limit, struct sctphdr *sh, 6108 struct sockaddr *altsa) 6109 { 6110 /* 6111 * grub through the INIT pulling addresses and loading them to the 6112 * nets structure in the asoc. The from address in the mbuf should 6113 * also be loaded (if it is not already). This routine can be called 6114 * with either INIT or INIT-ACK's as long as the m points to the IP 6115 * packet and the offset points to the beginning of the parameters. 6116 */ 6117 struct sctp_inpcb *inp, *l_inp; 6118 struct sctp_nets *net, *nnet, *net_tmp; 6119 struct ip *iph; 6120 struct sctp_paramhdr *phdr, parm_buf; 6121 struct sctp_tcb *stcb_tmp; 6122 uint16_t ptype, plen; 6123 struct sockaddr *sa; 6124 struct sockaddr_storage dest_store; 6125 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 6126 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6127 struct sctp_auth_random *p_random = NULL; 6128 uint16_t random_len = 0; 6129 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6130 struct sctp_auth_hmac_algo *hmacs = NULL; 6131 uint16_t hmacs_len = 0; 6132 uint8_t saw_asconf = 0; 6133 uint8_t saw_asconf_ack = 0; 6134 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6135 struct sctp_auth_chunk_list *chunks = NULL; 6136 uint16_t num_chunks = 0; 6137 sctp_key_t *new_key; 6138 uint32_t keylen; 6139 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6140 uint8_t ecn_allowed; 6141 6142 #ifdef INET 6143 struct sockaddr_in sin; 6144 6145 #endif 6146 #ifdef INET6 6147 struct sockaddr_in6 sin6; 6148 6149 #endif 6150 6151 /* First get the destination address setup too. */ 6152 #ifdef INET 6153 memset(&sin, 0, sizeof(sin)); 6154 sin.sin_family = AF_INET; 6155 sin.sin_len = sizeof(sin); 6156 sin.sin_port = stcb->rport; 6157 #endif 6158 #ifdef INET6 6159 memset(&sin6, 0, sizeof(sin6)); 6160 sin6.sin6_family = AF_INET6; 6161 sin6.sin6_len = sizeof(struct sockaddr_in6); 6162 sin6.sin6_port = stcb->rport; 6163 #endif 6164 iph = mtod(m, struct ip *); 6165 switch (iph->ip_v) { 6166 #ifdef INET 6167 case IPVERSION: 6168 { 6169 /* its IPv4 */ 6170 struct sockaddr_in *sin_2; 6171 6172 sin_2 = (struct sockaddr_in *)(local_sa); 6173 memset(sin_2, 0, sizeof(sin)); 6174 sin_2->sin_family = AF_INET; 6175 sin_2->sin_len = sizeof(sin); 6176 sin_2->sin_port = sh->dest_port; 6177 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 6178 if (altsa) { 6179 /* 6180 * For cookies we use the src address NOT 6181 * from the packet but from the original 6182 * INIT. 6183 */ 6184 sa = altsa; 6185 } else { 6186 sin.sin_addr = iph->ip_src; 6187 sa = (struct sockaddr *)&sin; 6188 } 6189 break; 6190 } 6191 #endif 6192 #ifdef INET6 6193 case IPV6_VERSION >> 4: 6194 { 6195 /* its IPv6 */ 6196 struct ip6_hdr *ip6; 6197 struct sockaddr_in6 *sin6_2; 6198 6199 ip6 = mtod(m, struct ip6_hdr *); 6200 sin6_2 = (struct sockaddr_in6 *)(local_sa); 6201 memset(sin6_2, 0, sizeof(sin6)); 6202 sin6_2->sin6_family = AF_INET6; 6203 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 6204 sin6_2->sin6_port = sh->dest_port; 6205 sin6_2->sin6_addr = ip6->ip6_dst; 6206 if (altsa) { 6207 /* 6208 * For cookies we use the src address NOT 6209 * from the packet but from the original 6210 * INIT. 6211 */ 6212 sa = altsa; 6213 } else { 6214 sin6.sin6_addr = ip6->ip6_src; 6215 sa = (struct sockaddr *)&sin6; 6216 } 6217 break; 6218 } 6219 #endif 6220 default: 6221 return (-1); 6222 break; 6223 } 6224 /* Turn off ECN until we get through all params */ 6225 ecn_allowed = 0; 6226 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6227 /* mark all addresses that we have currently on the list */ 6228 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6229 } 6230 /* does the source address already exist? if so skip it */ 6231 l_inp = inp = stcb->sctp_ep; 6232 6233 atomic_add_int(&stcb->asoc.refcnt, 1); 6234 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 6235 atomic_add_int(&stcb->asoc.refcnt, -1); 6236 6237 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6238 /* we must add the source address */ 6239 /* no scope set here since we have a tcb already. */ 6240 switch (sa->sa_family) { 6241 #ifdef INET 6242 case AF_INET: 6243 if (stcb->asoc.ipv4_addr_legal) { 6244 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6245 return (-1); 6246 } 6247 } 6248 break; 6249 #endif 6250 #ifdef INET6 6251 case AF_INET6: 6252 if (stcb->asoc.ipv6_addr_legal) { 6253 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6254 return (-2); 6255 } 6256 } 6257 break; 6258 #endif 6259 default: 6260 break; 6261 } 6262 } else { 6263 if (net_tmp != NULL && stcb_tmp == stcb) { 6264 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6265 } else if (stcb_tmp != stcb) { 6266 /* It belongs to another association? */ 6267 if (stcb_tmp) 6268 SCTP_TCB_UNLOCK(stcb_tmp); 6269 return (-3); 6270 } 6271 } 6272 if (stcb->asoc.state == 0) { 6273 /* the assoc was freed? */ 6274 return (-4); 6275 } 6276 /* 6277 * peer must explicitly turn this on. This may have been initialized 6278 * to be "on" in order to allow local addr changes while INIT's are 6279 * in flight. 6280 */ 6281 stcb->asoc.peer_supports_asconf = 0; 6282 /* now we must go through each of the params. */ 6283 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6284 while (phdr) { 6285 ptype = ntohs(phdr->param_type); 6286 plen = ntohs(phdr->param_length); 6287 /* 6288 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 6289 * (int)plen); 6290 */ 6291 if (offset + plen > limit) { 6292 break; 6293 } 6294 if (plen == 0) { 6295 break; 6296 } 6297 #ifdef INET 6298 if (ptype == SCTP_IPV4_ADDRESS) { 6299 if (stcb->asoc.ipv4_addr_legal) { 6300 struct sctp_ipv4addr_param *p4, p4_buf; 6301 6302 /* ok get the v4 address and check/add */ 6303 phdr = sctp_get_next_param(m, offset, 6304 (struct sctp_paramhdr *)&p4_buf, 6305 sizeof(p4_buf)); 6306 if (plen != sizeof(struct sctp_ipv4addr_param) || 6307 phdr == NULL) { 6308 return (-5); 6309 } 6310 p4 = (struct sctp_ipv4addr_param *)phdr; 6311 sin.sin_addr.s_addr = p4->addr; 6312 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6313 /* Skip multi-cast addresses */ 6314 goto next_param; 6315 } 6316 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6317 (sin.sin_addr.s_addr == INADDR_ANY)) { 6318 goto next_param; 6319 } 6320 sa = (struct sockaddr *)&sin; 6321 inp = stcb->sctp_ep; 6322 atomic_add_int(&stcb->asoc.refcnt, 1); 6323 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6324 local_sa, stcb); 6325 atomic_add_int(&stcb->asoc.refcnt, -1); 6326 6327 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6328 inp == NULL) { 6329 /* we must add the source address */ 6330 /* 6331 * no scope set since we have a tcb 6332 * already 6333 */ 6334 6335 /* 6336 * we must validate the state again 6337 * here 6338 */ 6339 add_it_now: 6340 if (stcb->asoc.state == 0) { 6341 /* the assoc was freed? */ 6342 return (-7); 6343 } 6344 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6345 return (-8); 6346 } 6347 } else if (stcb_tmp == stcb) { 6348 if (stcb->asoc.state == 0) { 6349 /* the assoc was freed? */ 6350 return (-10); 6351 } 6352 if (net != NULL) { 6353 /* clear flag */ 6354 net->dest_state &= 6355 ~SCTP_ADDR_NOT_IN_ASSOC; 6356 } 6357 } else { 6358 /* 6359 * strange, address is in another 6360 * assoc? straighten out locks. 6361 */ 6362 if (stcb_tmp) { 6363 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6364 /* 6365 * in setup state we 6366 * abort this guy 6367 */ 6368 sctp_abort_an_association(stcb_tmp->sctp_ep, 6369 stcb_tmp, 1, NULL, 0); 6370 goto add_it_now; 6371 } 6372 SCTP_TCB_UNLOCK(stcb_tmp); 6373 } 6374 if (stcb->asoc.state == 0) { 6375 /* the assoc was freed? */ 6376 return (-12); 6377 } 6378 return (-13); 6379 } 6380 } 6381 } else 6382 #endif 6383 #ifdef INET6 6384 if (ptype == SCTP_IPV6_ADDRESS) { 6385 if (stcb->asoc.ipv6_addr_legal) { 6386 /* ok get the v6 address and check/add */ 6387 struct sctp_ipv6addr_param *p6, p6_buf; 6388 6389 phdr = sctp_get_next_param(m, offset, 6390 (struct sctp_paramhdr *)&p6_buf, 6391 sizeof(p6_buf)); 6392 if (plen != sizeof(struct sctp_ipv6addr_param) || 6393 phdr == NULL) { 6394 return (-14); 6395 } 6396 p6 = (struct sctp_ipv6addr_param *)phdr; 6397 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6398 sizeof(p6->addr)); 6399 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6400 /* Skip multi-cast addresses */ 6401 goto next_param; 6402 } 6403 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6404 /* 6405 * Link local make no sense without 6406 * scope 6407 */ 6408 goto next_param; 6409 } 6410 sa = (struct sockaddr *)&sin6; 6411 inp = stcb->sctp_ep; 6412 atomic_add_int(&stcb->asoc.refcnt, 1); 6413 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6414 local_sa, stcb); 6415 atomic_add_int(&stcb->asoc.refcnt, -1); 6416 if (stcb_tmp == NULL && 6417 (inp == stcb->sctp_ep || inp == NULL)) { 6418 /* 6419 * we must validate the state again 6420 * here 6421 */ 6422 add_it_now6: 6423 if (stcb->asoc.state == 0) { 6424 /* the assoc was freed? */ 6425 return (-16); 6426 } 6427 /* 6428 * we must add the address, no scope 6429 * set 6430 */ 6431 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6432 return (-17); 6433 } 6434 } else if (stcb_tmp == stcb) { 6435 /* 6436 * we must validate the state again 6437 * here 6438 */ 6439 if (stcb->asoc.state == 0) { 6440 /* the assoc was freed? */ 6441 return (-19); 6442 } 6443 if (net != NULL) { 6444 /* clear flag */ 6445 net->dest_state &= 6446 ~SCTP_ADDR_NOT_IN_ASSOC; 6447 } 6448 } else { 6449 /* 6450 * strange, address is in another 6451 * assoc? straighten out locks. 6452 */ 6453 if (stcb_tmp) 6454 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6455 /* 6456 * in setup state we 6457 * abort this guy 6458 */ 6459 sctp_abort_an_association(stcb_tmp->sctp_ep, 6460 stcb_tmp, 1, NULL, 0); 6461 goto add_it_now6; 6462 } 6463 SCTP_TCB_UNLOCK(stcb_tmp); 6464 6465 if (stcb->asoc.state == 0) { 6466 /* the assoc was freed? */ 6467 return (-21); 6468 } 6469 return (-22); 6470 } 6471 } 6472 } else 6473 #endif 6474 if (ptype == SCTP_ECN_CAPABLE) { 6475 ecn_allowed = 1; 6476 } else if (ptype == SCTP_ULP_ADAPTATION) { 6477 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6478 struct sctp_adaptation_layer_indication ai, 6479 *aip; 6480 6481 phdr = sctp_get_next_param(m, offset, 6482 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6483 aip = (struct sctp_adaptation_layer_indication *)phdr; 6484 if (aip) { 6485 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6486 stcb->asoc.adaptation_needed = 1; 6487 } 6488 } 6489 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6490 struct sctp_asconf_addr_param lstore, *fee; 6491 int lptype; 6492 struct sockaddr *lsa = NULL; 6493 6494 #ifdef INET 6495 struct sctp_asconf_addrv4_param *fii; 6496 6497 #endif 6498 6499 stcb->asoc.peer_supports_asconf = 1; 6500 if (plen > sizeof(lstore)) { 6501 return (-23); 6502 } 6503 phdr = sctp_get_next_param(m, offset, 6504 (struct sctp_paramhdr *)&lstore, 6505 min(plen, sizeof(lstore))); 6506 if (phdr == NULL) { 6507 return (-24); 6508 } 6509 fee = (struct sctp_asconf_addr_param *)phdr; 6510 lptype = ntohs(fee->addrp.ph.param_type); 6511 switch (lptype) { 6512 #ifdef INET 6513 case SCTP_IPV4_ADDRESS: 6514 if (plen != 6515 sizeof(struct sctp_asconf_addrv4_param)) { 6516 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6517 (int)sizeof(struct sctp_asconf_addrv4_param), 6518 plen); 6519 } else { 6520 fii = (struct sctp_asconf_addrv4_param *)fee; 6521 sin.sin_addr.s_addr = fii->addrp.addr; 6522 lsa = (struct sockaddr *)&sin; 6523 } 6524 break; 6525 #endif 6526 #ifdef INET6 6527 case SCTP_IPV6_ADDRESS: 6528 if (plen != 6529 sizeof(struct sctp_asconf_addr_param)) { 6530 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6531 (int)sizeof(struct sctp_asconf_addr_param), 6532 plen); 6533 } else { 6534 memcpy(sin6.sin6_addr.s6_addr, 6535 fee->addrp.addr, 6536 sizeof(fee->addrp.addr)); 6537 lsa = (struct sockaddr *)&sin6; 6538 } 6539 break; 6540 #endif 6541 default: 6542 break; 6543 } 6544 if (lsa) { 6545 (void)sctp_set_primary_addr(stcb, sa, NULL); 6546 } 6547 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6548 stcb->asoc.peer_supports_nat = 1; 6549 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6550 /* Peer supports pr-sctp */ 6551 stcb->asoc.peer_supports_prsctp = 1; 6552 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6553 /* A supported extension chunk */ 6554 struct sctp_supported_chunk_types_param *pr_supported; 6555 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6556 int num_ent, i; 6557 6558 phdr = sctp_get_next_param(m, offset, 6559 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6560 if (phdr == NULL) { 6561 return (-25); 6562 } 6563 stcb->asoc.peer_supports_asconf = 0; 6564 stcb->asoc.peer_supports_prsctp = 0; 6565 stcb->asoc.peer_supports_pktdrop = 0; 6566 stcb->asoc.peer_supports_strreset = 0; 6567 stcb->asoc.peer_supports_nr_sack = 0; 6568 stcb->asoc.peer_supports_auth = 0; 6569 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6570 num_ent = plen - sizeof(struct sctp_paramhdr); 6571 for (i = 0; i < num_ent; i++) { 6572 switch (pr_supported->chunk_types[i]) { 6573 case SCTP_ASCONF: 6574 case SCTP_ASCONF_ACK: 6575 stcb->asoc.peer_supports_asconf = 1; 6576 break; 6577 case SCTP_FORWARD_CUM_TSN: 6578 stcb->asoc.peer_supports_prsctp = 1; 6579 break; 6580 case SCTP_PACKET_DROPPED: 6581 stcb->asoc.peer_supports_pktdrop = 1; 6582 break; 6583 case SCTP_NR_SELECTIVE_ACK: 6584 stcb->asoc.peer_supports_nr_sack = 1; 6585 break; 6586 case SCTP_STREAM_RESET: 6587 stcb->asoc.peer_supports_strreset = 1; 6588 break; 6589 case SCTP_AUTHENTICATION: 6590 stcb->asoc.peer_supports_auth = 1; 6591 break; 6592 default: 6593 /* one I have not learned yet */ 6594 break; 6595 6596 } 6597 } 6598 } else if (ptype == SCTP_RANDOM) { 6599 if (plen > sizeof(random_store)) 6600 break; 6601 if (got_random) { 6602 /* already processed a RANDOM */ 6603 goto next_param; 6604 } 6605 phdr = sctp_get_next_param(m, offset, 6606 (struct sctp_paramhdr *)random_store, 6607 min(sizeof(random_store), plen)); 6608 if (phdr == NULL) 6609 return (-26); 6610 p_random = (struct sctp_auth_random *)phdr; 6611 random_len = plen - sizeof(*p_random); 6612 /* enforce the random length */ 6613 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6614 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6615 return (-27); 6616 } 6617 got_random = 1; 6618 } else if (ptype == SCTP_HMAC_LIST) { 6619 int num_hmacs; 6620 int i; 6621 6622 if (plen > sizeof(hmacs_store)) 6623 break; 6624 if (got_hmacs) { 6625 /* already processed a HMAC list */ 6626 goto next_param; 6627 } 6628 phdr = sctp_get_next_param(m, offset, 6629 (struct sctp_paramhdr *)hmacs_store, 6630 min(plen, sizeof(hmacs_store))); 6631 if (phdr == NULL) 6632 return (-28); 6633 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6634 hmacs_len = plen - sizeof(*hmacs); 6635 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6636 /* validate the hmac list */ 6637 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6638 return (-29); 6639 } 6640 if (stcb->asoc.peer_hmacs != NULL) 6641 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6642 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6643 if (stcb->asoc.peer_hmacs != NULL) { 6644 for (i = 0; i < num_hmacs; i++) { 6645 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6646 ntohs(hmacs->hmac_ids[i])); 6647 } 6648 } 6649 got_hmacs = 1; 6650 } else if (ptype == SCTP_CHUNK_LIST) { 6651 int i; 6652 6653 if (plen > sizeof(chunks_store)) 6654 break; 6655 if (got_chklist) { 6656 /* already processed a Chunks list */ 6657 goto next_param; 6658 } 6659 phdr = sctp_get_next_param(m, offset, 6660 (struct sctp_paramhdr *)chunks_store, 6661 min(plen, sizeof(chunks_store))); 6662 if (phdr == NULL) 6663 return (-30); 6664 chunks = (struct sctp_auth_chunk_list *)phdr; 6665 num_chunks = plen - sizeof(*chunks); 6666 if (stcb->asoc.peer_auth_chunks != NULL) 6667 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6668 else 6669 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6670 for (i = 0; i < num_chunks; i++) { 6671 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6672 stcb->asoc.peer_auth_chunks); 6673 /* record asconf/asconf-ack if listed */ 6674 if (chunks->chunk_types[i] == SCTP_ASCONF) 6675 saw_asconf = 1; 6676 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6677 saw_asconf_ack = 1; 6678 6679 } 6680 got_chklist = 1; 6681 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6682 (ptype == SCTP_STATE_COOKIE) || 6683 (ptype == SCTP_UNRECOG_PARAM) || 6684 (ptype == SCTP_COOKIE_PRESERVE) || 6685 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6686 (ptype == SCTP_ADD_IP_ADDRESS) || 6687 (ptype == SCTP_DEL_IP_ADDRESS) || 6688 (ptype == SCTP_ERROR_CAUSE_IND) || 6689 (ptype == SCTP_SUCCESS_REPORT)) { 6690 /* don't care */ ; 6691 } else { 6692 if ((ptype & 0x8000) == 0x0000) { 6693 /* 6694 * must stop processing the rest of the 6695 * param's. Any report bits were handled 6696 * with the call to 6697 * sctp_arethere_unrecognized_parameters() 6698 * when the INIT or INIT-ACK was first seen. 6699 */ 6700 break; 6701 } 6702 } 6703 6704 next_param: 6705 offset += SCTP_SIZE32(plen); 6706 if (offset >= limit) { 6707 break; 6708 } 6709 phdr = sctp_get_next_param(m, offset, &parm_buf, 6710 sizeof(parm_buf)); 6711 } 6712 /* Now check to see if we need to purge any addresses */ 6713 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6714 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6715 SCTP_ADDR_NOT_IN_ASSOC) { 6716 /* This address has been removed from the asoc */ 6717 /* remove and free it */ 6718 stcb->asoc.numnets--; 6719 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6720 sctp_free_remote_addr(net); 6721 if (net == stcb->asoc.primary_destination) { 6722 stcb->asoc.primary_destination = NULL; 6723 sctp_select_primary_destination(stcb); 6724 } 6725 } 6726 } 6727 if (ecn_allowed == 0) { 6728 stcb->asoc.ecn_allowed = 0; 6729 } 6730 /* validate authentication required parameters */ 6731 if (got_random && got_hmacs) { 6732 stcb->asoc.peer_supports_auth = 1; 6733 } else { 6734 stcb->asoc.peer_supports_auth = 0; 6735 } 6736 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6737 /* peer does not support auth but sent a chunks list? */ 6738 return (-31); 6739 } 6740 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6741 !stcb->asoc.peer_supports_auth) { 6742 /* peer supports asconf but not auth? */ 6743 return (-32); 6744 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6745 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6746 return (-33); 6747 } 6748 /* concatenate the full random key */ 6749 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6750 if (chunks != NULL) { 6751 keylen += sizeof(*chunks) + num_chunks; 6752 } 6753 new_key = sctp_alloc_key(keylen); 6754 if (new_key != NULL) { 6755 /* copy in the RANDOM */ 6756 if (p_random != NULL) { 6757 keylen = sizeof(*p_random) + random_len; 6758 bcopy(p_random, new_key->key, keylen); 6759 } 6760 /* append in the AUTH chunks */ 6761 if (chunks != NULL) { 6762 bcopy(chunks, new_key->key + keylen, 6763 sizeof(*chunks) + num_chunks); 6764 keylen += sizeof(*chunks) + num_chunks; 6765 } 6766 /* append in the HMACs */ 6767 if (hmacs != NULL) { 6768 bcopy(hmacs, new_key->key + keylen, 6769 sizeof(*hmacs) + hmacs_len); 6770 } 6771 } else { 6772 /* failed to get memory for the key */ 6773 return (-34); 6774 } 6775 if (stcb->asoc.authinfo.peer_random != NULL) 6776 sctp_free_key(stcb->asoc.authinfo.peer_random); 6777 stcb->asoc.authinfo.peer_random = new_key; 6778 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6779 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6780 6781 return (0); 6782 } 6783 6784 int 6785 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6786 struct sctp_nets *net) 6787 { 6788 /* make sure the requested primary address exists in the assoc */ 6789 if (net == NULL && sa) 6790 net = sctp_findnet(stcb, sa); 6791 6792 if (net == NULL) { 6793 /* didn't find the requested primary address! */ 6794 return (-1); 6795 } else { 6796 /* set the primary address */ 6797 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6798 /* Must be confirmed, so queue to set */ 6799 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6800 return (0); 6801 } 6802 stcb->asoc.primary_destination = net; 6803 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6804 sctp_free_remote_addr(stcb->asoc.alternate); 6805 stcb->asoc.alternate = NULL; 6806 } 6807 net = TAILQ_FIRST(&stcb->asoc.nets); 6808 if (net != stcb->asoc.primary_destination) { 6809 /* 6810 * first one on the list is NOT the primary 6811 * sctp_cmpaddr() is much more efficient if the 6812 * primary is the first on the list, make it so. 6813 */ 6814 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6815 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6816 } 6817 return (0); 6818 } 6819 } 6820 6821 int 6822 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6823 { 6824 /* 6825 * This function serves two purposes. It will see if a TAG can be 6826 * re-used and return 1 for yes it is ok and 0 for don't use that 6827 * tag. A secondary function it will do is purge out old tags that 6828 * can be removed. 6829 */ 6830 struct sctpvtaghead *chain; 6831 struct sctp_tagblock *twait_block; 6832 struct sctpasochead *head; 6833 struct sctp_tcb *stcb; 6834 int i; 6835 6836 SCTP_INP_INFO_RLOCK(); 6837 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6838 SCTP_BASE_INFO(hashasocmark))]; 6839 if (head == NULL) { 6840 /* invalid vtag */ 6841 goto skip_vtag_check; 6842 } 6843 LIST_FOREACH(stcb, head, sctp_asocs) { 6844 /* 6845 * We choose not to lock anything here. TCB's can't be 6846 * removed since we have the read lock, so they can't be 6847 * freed on us, same thing for the INP. I may be wrong with 6848 * this assumption, but we will go with it for now :-) 6849 */ 6850 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6851 continue; 6852 } 6853 if (stcb->asoc.my_vtag == tag) { 6854 /* candidate */ 6855 if (stcb->rport != rport) { 6856 continue; 6857 } 6858 if (stcb->sctp_ep->sctp_lport != lport) { 6859 continue; 6860 } 6861 /* Its a used tag set */ 6862 SCTP_INP_INFO_RUNLOCK(); 6863 return (0); 6864 } 6865 } 6866 skip_vtag_check: 6867 6868 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6869 /* Now what about timed wait ? */ 6870 if (!LIST_EMPTY(chain)) { 6871 /* 6872 * Block(s) are present, lets see if we have this tag in the 6873 * list 6874 */ 6875 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6876 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6877 if (twait_block->vtag_block[i].v_tag == 0) { 6878 /* not used */ 6879 continue; 6880 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6881 now->tv_sec) { 6882 /* Audit expires this guy */ 6883 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6884 twait_block->vtag_block[i].v_tag = 0; 6885 twait_block->vtag_block[i].lport = 0; 6886 twait_block->vtag_block[i].rport = 0; 6887 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6888 (twait_block->vtag_block[i].lport == lport) && 6889 (twait_block->vtag_block[i].rport == rport)) { 6890 /* Bad tag, sorry :< */ 6891 SCTP_INP_INFO_RUNLOCK(); 6892 return (0); 6893 } 6894 } 6895 } 6896 } 6897 SCTP_INP_INFO_RUNLOCK(); 6898 return (1); 6899 } 6900 6901 6902 static sctp_assoc_t reneged_asoc_ids[256]; 6903 static uint8_t reneged_at = 0; 6904 6905 6906 static void 6907 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6908 { 6909 /* 6910 * We must hunt this association for MBUF's past the cumack (i.e. 6911 * out of order data that we can renege on). 6912 */ 6913 struct sctp_association *asoc; 6914 struct sctp_tmit_chunk *chk, *nchk; 6915 uint32_t cumulative_tsn_p1; 6916 struct sctp_queued_to_read *ctl, *nctl; 6917 int cnt, strmat; 6918 uint32_t gap, i; 6919 int fnd = 0; 6920 6921 /* We look for anything larger than the cum-ack + 1 */ 6922 6923 asoc = &stcb->asoc; 6924 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6925 /* none we can reneg on. */ 6926 return; 6927 } 6928 SCTP_STAT_INCR(sctps_protocol_drains_done); 6929 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6930 cnt = 0; 6931 /* First look in the re-assembly queue */ 6932 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6933 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6934 /* Yep it is above cum-ack */ 6935 cnt++; 6936 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6937 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6938 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6939 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6940 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6941 if (chk->data) { 6942 sctp_m_freem(chk->data); 6943 chk->data = NULL; 6944 } 6945 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6946 } 6947 } 6948 /* Ok that was fun, now we will drain all the inbound streams? */ 6949 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6950 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6951 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6952 /* Yep it is above cum-ack */ 6953 cnt++; 6954 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6955 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6956 sctp_ucount_decr(asoc->cnt_on_all_streams); 6957 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6958 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6959 if (ctl->data) { 6960 sctp_m_freem(ctl->data); 6961 ctl->data = NULL; 6962 } 6963 sctp_free_remote_addr(ctl->whoFrom); 6964 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6965 SCTP_DECR_READQ_COUNT(); 6966 } 6967 } 6968 } 6969 if (cnt) { 6970 /* We must back down to see what the new highest is */ 6971 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6972 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6973 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6974 asoc->highest_tsn_inside_map = i; 6975 fnd = 1; 6976 break; 6977 } 6978 } 6979 if (!fnd) { 6980 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6981 } 6982 /* 6983 * Question, should we go through the delivery queue? The 6984 * only reason things are on here is the app not reading OR 6985 * a p-d-api up. An attacker COULD send enough in to 6986 * initiate the PD-API and then send a bunch of stuff to 6987 * other streams... these would wind up on the delivery 6988 * queue.. and then we would not get to them. But in order 6989 * to do this I then have to back-track and un-deliver 6990 * sequence numbers in streams.. el-yucko. I think for now 6991 * we will NOT look at the delivery queue and leave it to be 6992 * something to consider later. An alternative would be to 6993 * abort the P-D-API with a notification and then deliver 6994 * the data.... Or another method might be to keep track of 6995 * how many times the situation occurs and if we see a 6996 * possible attack underway just abort the association. 6997 */ 6998 #ifdef SCTP_DEBUG 6999 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 7000 #endif 7001 /* 7002 * Now do we need to find a new 7003 * asoc->highest_tsn_inside_map? 7004 */ 7005 asoc->last_revoke_count = cnt; 7006 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 7007 /* sa_ignore NO_NULL_CHK */ 7008 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 7009 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 7010 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 7011 reneged_at++; 7012 } 7013 /* 7014 * Another issue, in un-setting the TSN's in the mapping array we 7015 * DID NOT adjust the highest_tsn marker. This will cause one of 7016 * two things to occur. It may cause us to do extra work in checking 7017 * for our mapping array movement. More importantly it may cause us 7018 * to SACK every datagram. This may not be a bad thing though since 7019 * we will recover once we get our cum-ack above and all this stuff 7020 * we dumped recovered. 7021 */ 7022 } 7023 7024 void 7025 sctp_drain() 7026 { 7027 /* 7028 * We must walk the PCB lists for ALL associations here. The system 7029 * is LOW on MBUF's and needs help. This is where reneging will 7030 * occur. We really hope this does NOT happen! 7031 */ 7032 VNET_ITERATOR_DECL(vnet_iter); 7033 VNET_LIST_RLOCK_NOSLEEP(); 7034 VNET_FOREACH(vnet_iter) { 7035 CURVNET_SET(vnet_iter); 7036 struct sctp_inpcb *inp; 7037 struct sctp_tcb *stcb; 7038 7039 SCTP_STAT_INCR(sctps_protocol_drain_calls); 7040 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 7041 #ifdef VIMAGE 7042 continue; 7043 #else 7044 return; 7045 #endif 7046 } 7047 SCTP_INP_INFO_RLOCK(); 7048 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 7049 /* For each endpoint */ 7050 SCTP_INP_RLOCK(inp); 7051 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 7052 /* For each association */ 7053 SCTP_TCB_LOCK(stcb); 7054 sctp_drain_mbufs(inp, stcb); 7055 SCTP_TCB_UNLOCK(stcb); 7056 } 7057 SCTP_INP_RUNLOCK(inp); 7058 } 7059 SCTP_INP_INFO_RUNLOCK(); 7060 CURVNET_RESTORE(); 7061 } 7062 VNET_LIST_RUNLOCK_NOSLEEP(); 7063 } 7064 7065 /* 7066 * start a new iterator 7067 * iterates through all endpoints and associations based on the pcb_state 7068 * flags and asoc_state. "af" (mandatory) is executed for all matching 7069 * assocs and "ef" (optional) is executed when the iterator completes. 7070 * "inpf" (optional) is executed for each new endpoint as it is being 7071 * iterated through. inpe (optional) is called when the inp completes 7072 * its way through all the stcbs. 7073 */ 7074 int 7075 sctp_initiate_iterator(inp_func inpf, 7076 asoc_func af, 7077 inp_func inpe, 7078 uint32_t pcb_state, 7079 uint32_t pcb_features, 7080 uint32_t asoc_state, 7081 void *argp, 7082 uint32_t argi, 7083 end_func ef, 7084 struct sctp_inpcb *s_inp, 7085 uint8_t chunk_output_off) 7086 { 7087 struct sctp_iterator *it = NULL; 7088 7089 if (af == NULL) { 7090 return (-1); 7091 } 7092 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7093 SCTP_M_ITER); 7094 if (it == NULL) { 7095 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7096 return (ENOMEM); 7097 } 7098 memset(it, 0, sizeof(*it)); 7099 it->function_assoc = af; 7100 it->function_inp = inpf; 7101 if (inpf) 7102 it->done_current_ep = 0; 7103 else 7104 it->done_current_ep = 1; 7105 it->function_atend = ef; 7106 it->pointer = argp; 7107 it->val = argi; 7108 it->pcb_flags = pcb_state; 7109 it->pcb_features = pcb_features; 7110 it->asoc_state = asoc_state; 7111 it->function_inp_end = inpe; 7112 it->no_chunk_output = chunk_output_off; 7113 it->vn = curvnet; 7114 if (s_inp) { 7115 /* Assume lock is held here */ 7116 it->inp = s_inp; 7117 SCTP_INP_INCR_REF(it->inp); 7118 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7119 } else { 7120 SCTP_INP_INFO_RLOCK(); 7121 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7122 if (it->inp) { 7123 SCTP_INP_INCR_REF(it->inp); 7124 } 7125 SCTP_INP_INFO_RUNLOCK(); 7126 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7127 7128 } 7129 SCTP_IPI_ITERATOR_WQ_LOCK(); 7130 7131 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7132 if (sctp_it_ctl.iterator_running == 0) { 7133 sctp_wakeup_iterator(); 7134 } 7135 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7136 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7137 return (0); 7138 } 7139