1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* $KAME: sctp_pcb.c,v 1.38 2005/03/06 16:04:18 itojun Exp $ */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <netinet/sctp_os.h> 39 #include <sys/proc.h> 40 #include <netinet/sctp_var.h> 41 #include <netinet/sctp_sysctl.h> 42 #include <netinet/sctp_pcb.h> 43 #include <netinet/sctputil.h> 44 #include <netinet/sctp.h> 45 #include <netinet/sctp_header.h> 46 #include <netinet/sctp_asconf.h> 47 #include <netinet/sctp_output.h> 48 #include <netinet/sctp_timer.h> 49 #include <netinet/sctp_bsd_addr.h> 50 #include <netinet/sctp_dtrace_define.h> 51 #include <netinet/udp.h> 52 #include <sys/sched.h> 53 #include <sys/smp.h> 54 #include <sys/unistd.h> 55 56 57 VNET_DEFINE(struct sctp_base_info, system_base_info); 58 59 /* FIX: we don't handle multiple link local scopes */ 60 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 61 #ifdef INET6 62 int 63 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 64 { 65 struct sockaddr_in6 tmp_a, tmp_b; 66 67 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 68 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 69 return 0; 70 } 71 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 72 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 73 return 0; 74 } 75 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 76 } 77 78 #endif 79 80 void 81 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 82 { 83 /* 84 * We really don't need to lock this, but I will just because it 85 * does not hurt. 86 */ 87 SCTP_INP_INFO_RLOCK(); 88 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 89 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 90 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 91 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 92 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 93 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 94 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 95 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 96 97 SCTP_INP_INFO_RUNLOCK(); 98 } 99 100 /* 101 * Addresses are added to VRF's (Virtual Router's). For BSD we 102 * have only the default VRF 0. We maintain a hash list of 103 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 104 * these has a list of addresses. When we add a new address 105 * to a VRF we lookup the ifn/ifn_index, if the ifn does 106 * not exist we create it and add it to the list of IFN's 107 * within the VRF. Once we have the sctp_ifn, we add the 108 * address to the list. So we look something like: 109 * 110 * hash-vrf-table 111 * vrf-> ifn-> ifn -> ifn 112 * vrf | 113 * ... +--ifa-> ifa -> ifa 114 * vrf 115 * 116 * We keep these separate lists since the SCTP subsystem will 117 * point to these from its source address selection nets structure. 118 * When an address is deleted it does not happen right away on 119 * the SCTP side, it gets scheduled. What we do when a 120 * delete happens is immediately remove the address from 121 * the master list and decrement the refcount. As our 122 * addip iterator works through and frees the src address 123 * selection pointing to the sctp_ifa, eventually the refcount 124 * will reach 0 and we will delete it. Note that it is assumed 125 * that any locking on system level ifn/ifa is done at the 126 * caller of these functions and these routines will only 127 * lock the SCTP structures as they add or delete things. 128 * 129 * Other notes on VRF concepts. 130 * - An endpoint can be in multiple VRF's 131 * - An association lives within a VRF and only one VRF. 132 * - Any incoming packet we can deduce the VRF for by 133 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 134 * - Any downward send call or connect call must supply the 135 * VRF via ancillary data or via some sort of set default 136 * VRF socket option call (again for BSD no brainer since 137 * the VRF is always 0). 138 * - An endpoint may add multiple VRF's to it. 139 * - Listening sockets can accept associations in any 140 * of the VRF's they are in but the assoc will end up 141 * in only one VRF (gotten from the packet or connect/send). 142 * 143 */ 144 145 struct sctp_vrf * 146 sctp_allocate_vrf(int vrf_id) 147 { 148 struct sctp_vrf *vrf = NULL; 149 struct sctp_vrflist *bucket; 150 151 /* First allocate the VRF structure */ 152 vrf = sctp_find_vrf(vrf_id); 153 if (vrf) { 154 /* Already allocated */ 155 return (vrf); 156 } 157 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 158 SCTP_M_VRF); 159 if (vrf == NULL) { 160 /* No memory */ 161 #ifdef INVARIANTS 162 panic("No memory for VRF:%d", vrf_id); 163 #endif 164 return (NULL); 165 } 166 /* setup the VRF */ 167 memset(vrf, 0, sizeof(struct sctp_vrf)); 168 vrf->vrf_id = vrf_id; 169 LIST_INIT(&vrf->ifnlist); 170 vrf->total_ifa_count = 0; 171 vrf->refcount = 0; 172 /* now also setup table ids */ 173 SCTP_INIT_VRF_TABLEID(vrf); 174 /* Init the HASH of addresses */ 175 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 176 &vrf->vrf_addr_hashmark); 177 if (vrf->vrf_addr_hash == NULL) { 178 /* No memory */ 179 #ifdef INVARIANTS 180 panic("No memory for VRF:%d", vrf_id); 181 #endif 182 SCTP_FREE(vrf, SCTP_M_VRF); 183 return (NULL); 184 } 185 /* Add it to the hash table */ 186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 187 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 189 return (vrf); 190 } 191 192 193 struct sctp_ifn * 194 sctp_find_ifn(void *ifn, uint32_t ifn_index) 195 { 196 struct sctp_ifn *sctp_ifnp; 197 struct sctp_ifnlist *hash_ifn_head; 198 199 /* 200 * We assume the lock is held for the addresses if that's wrong 201 * problems could occur :-) 202 */ 203 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 205 if (sctp_ifnp->ifn_index == ifn_index) { 206 return (sctp_ifnp); 207 } 208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 209 return (sctp_ifnp); 210 } 211 } 212 return (NULL); 213 } 214 215 216 217 struct sctp_vrf * 218 sctp_find_vrf(uint32_t vrf_id) 219 { 220 struct sctp_vrflist *bucket; 221 struct sctp_vrf *liste; 222 223 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 224 LIST_FOREACH(liste, bucket, next_vrf) { 225 if (vrf_id == liste->vrf_id) { 226 return (liste); 227 } 228 } 229 return (NULL); 230 } 231 232 void 233 sctp_free_vrf(struct sctp_vrf *vrf) 234 { 235 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 236 if (vrf->vrf_addr_hash) { 237 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 238 vrf->vrf_addr_hash = NULL; 239 } 240 /* We zero'd the count */ 241 LIST_REMOVE(vrf, next_vrf); 242 SCTP_FREE(vrf, SCTP_M_VRF); 243 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 244 } 245 } 246 247 void 248 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 249 { 250 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 251 /* We zero'd the count */ 252 if (sctp_ifnp->vrf) { 253 sctp_free_vrf(sctp_ifnp->vrf); 254 } 255 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 256 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 257 } 258 } 259 260 void 261 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 262 { 263 struct sctp_ifn *sctp_ifnp; 264 265 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 266 if (sctp_ifnp != NULL) { 267 sctp_ifnp->ifn_mtu = mtu; 268 } 269 } 270 271 272 void 273 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 274 { 275 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 276 /* We zero'd the count */ 277 if (sctp_ifap->ifn_p) { 278 sctp_free_ifn(sctp_ifap->ifn_p); 279 } 280 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 281 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 282 } 283 } 284 285 static void 286 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 287 { 288 struct sctp_ifn *found; 289 290 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 291 if (found == NULL) { 292 /* Not in the list.. sorry */ 293 return; 294 } 295 if (hold_addr_lock == 0) 296 SCTP_IPI_ADDR_WLOCK(); 297 LIST_REMOVE(sctp_ifnp, next_bucket); 298 LIST_REMOVE(sctp_ifnp, next_ifn); 299 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 300 sctp_ifnp->registered_af); 301 if (hold_addr_lock == 0) 302 SCTP_IPI_ADDR_WUNLOCK(); 303 /* Take away the reference, and possibly free it */ 304 sctp_free_ifn(sctp_ifnp); 305 } 306 307 void 308 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 309 const char *if_name, uint32_t ifn_index) 310 { 311 struct sctp_vrf *vrf; 312 struct sctp_ifa *sctp_ifap = NULL; 313 314 SCTP_IPI_ADDR_RLOCK(); 315 vrf = sctp_find_vrf(vrf_id); 316 if (vrf == NULL) { 317 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 318 goto out; 319 320 } 321 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 322 if (sctp_ifap == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 324 goto out; 325 } 326 if (sctp_ifap->ifn_p == NULL) { 327 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 328 goto out; 329 } 330 if (if_name) { 331 int len1, len2; 332 333 len1 = strlen(if_name); 334 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 335 if (len1 != len2) { 336 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n", 337 len1, len2); 338 goto out; 339 } 340 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 341 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 342 sctp_ifap->ifn_p->ifn_name, 343 if_name); 344 goto out; 345 } 346 } else { 347 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 348 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 349 sctp_ifap->ifn_p->ifn_index, ifn_index); 350 goto out; 351 } 352 } 353 354 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 355 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 356 out: 357 SCTP_IPI_ADDR_RUNLOCK(); 358 } 359 360 void 361 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 362 const char *if_name, uint32_t ifn_index) 363 { 364 struct sctp_vrf *vrf; 365 struct sctp_ifa *sctp_ifap = NULL; 366 367 SCTP_IPI_ADDR_RLOCK(); 368 vrf = sctp_find_vrf(vrf_id); 369 if (vrf == NULL) { 370 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 371 goto out; 372 373 } 374 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 375 if (sctp_ifap == NULL) { 376 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 377 goto out; 378 } 379 if (sctp_ifap->ifn_p == NULL) { 380 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 381 goto out; 382 } 383 if (if_name) { 384 int len1, len2; 385 386 len1 = strlen(if_name); 387 len2 = strlen(sctp_ifap->ifn_p->ifn_name); 388 if (len1 != len2) { 389 SCTPDBG(SCTP_DEBUG_PCB4, "IFN of ifa names different length %d vs %d - ignored\n", 390 len1, len2); 391 goto out; 392 } 393 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) != 0) { 394 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 395 sctp_ifap->ifn_p->ifn_name, 396 if_name); 397 goto out; 398 } 399 } else { 400 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 401 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 402 sctp_ifap->ifn_p->ifn_index, ifn_index); 403 goto out; 404 } 405 } 406 407 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 408 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 409 out: 410 SCTP_IPI_ADDR_RUNLOCK(); 411 } 412 413 /*- 414 * Add an ifa to an ifn. 415 * Register the interface as necessary. 416 * NOTE: ADDR write lock MUST be held. 417 */ 418 static void 419 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 420 { 421 int ifa_af; 422 423 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 424 sctp_ifap->ifn_p = sctp_ifnp; 425 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 426 /* update address counts */ 427 sctp_ifnp->ifa_count++; 428 ifa_af = sctp_ifap->address.sa.sa_family; 429 if (ifa_af == AF_INET) 430 sctp_ifnp->num_v4++; 431 else 432 sctp_ifnp->num_v6++; 433 if (sctp_ifnp->ifa_count == 1) { 434 /* register the new interface */ 435 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 436 sctp_ifnp->registered_af = ifa_af; 437 } 438 } 439 440 /*- 441 * Remove an ifa from its ifn. 442 * If no more addresses exist, remove the ifn too. Otherwise, re-register 443 * the interface based on the remaining address families left. 444 * NOTE: ADDR write lock MUST be held. 445 */ 446 static void 447 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 448 { 449 uint32_t ifn_index; 450 451 LIST_REMOVE(sctp_ifap, next_ifa); 452 if (sctp_ifap->ifn_p) { 453 /* update address counts */ 454 sctp_ifap->ifn_p->ifa_count--; 455 if (sctp_ifap->address.sa.sa_family == AF_INET6) 456 sctp_ifap->ifn_p->num_v6--; 457 else if (sctp_ifap->address.sa.sa_family == AF_INET) 458 sctp_ifap->ifn_p->num_v4--; 459 460 ifn_index = sctp_ifap->ifn_p->ifn_index; 461 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 462 /* remove the ifn, possibly freeing it */ 463 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 464 } else { 465 /* re-register address family type, if needed */ 466 if ((sctp_ifap->ifn_p->num_v6 == 0) && 467 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 468 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET6); 469 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET); 470 sctp_ifap->ifn_p->registered_af = AF_INET; 471 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 472 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 473 SCTP_DEREGISTER_INTERFACE(ifn_index, AF_INET); 474 SCTP_REGISTER_INTERFACE(ifn_index, AF_INET6); 475 sctp_ifap->ifn_p->registered_af = AF_INET6; 476 } 477 /* free the ifn refcount */ 478 sctp_free_ifn(sctp_ifap->ifn_p); 479 } 480 sctp_ifap->ifn_p = NULL; 481 } 482 } 483 484 struct sctp_ifa * 485 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 486 uint32_t ifn_type, const char *if_name, void *ifa, 487 struct sockaddr *addr, uint32_t ifa_flags, 488 int dynamic_add) 489 { 490 struct sctp_vrf *vrf; 491 struct sctp_ifn *sctp_ifnp = NULL; 492 struct sctp_ifa *sctp_ifap = NULL; 493 struct sctp_ifalist *hash_addr_head; 494 struct sctp_ifnlist *hash_ifn_head; 495 uint32_t hash_of_addr; 496 int new_ifn_af = 0; 497 498 #ifdef SCTP_DEBUG 499 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 500 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 501 #endif 502 SCTP_IPI_ADDR_WLOCK(); 503 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 504 if (sctp_ifnp) { 505 vrf = sctp_ifnp->vrf; 506 } else { 507 vrf = sctp_find_vrf(vrf_id); 508 if (vrf == NULL) { 509 vrf = sctp_allocate_vrf(vrf_id); 510 if (vrf == NULL) { 511 SCTP_IPI_ADDR_WUNLOCK(); 512 return (NULL); 513 } 514 } 515 } 516 if (sctp_ifnp == NULL) { 517 /* 518 * build one and add it, can't hold lock until after malloc 519 * done though. 520 */ 521 SCTP_IPI_ADDR_WUNLOCK(); 522 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 523 sizeof(struct sctp_ifn), SCTP_M_IFN); 524 if (sctp_ifnp == NULL) { 525 #ifdef INVARIANTS 526 panic("No memory for IFN"); 527 #endif 528 return (NULL); 529 } 530 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 531 sctp_ifnp->ifn_index = ifn_index; 532 sctp_ifnp->ifn_p = ifn; 533 sctp_ifnp->ifn_type = ifn_type; 534 sctp_ifnp->refcount = 0; 535 sctp_ifnp->vrf = vrf; 536 atomic_add_int(&vrf->refcount, 1); 537 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 538 if (if_name != NULL) { 539 memcpy(sctp_ifnp->ifn_name, if_name, SCTP_IFNAMSIZ); 540 } else { 541 memcpy(sctp_ifnp->ifn_name, "unknown", min(7, SCTP_IFNAMSIZ)); 542 } 543 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 544 LIST_INIT(&sctp_ifnp->ifalist); 545 SCTP_IPI_ADDR_WLOCK(); 546 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 547 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 548 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 549 new_ifn_af = 1; 550 } 551 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 552 if (sctp_ifap) { 553 /* Hmm, it already exists? */ 554 if ((sctp_ifap->ifn_p) && 555 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 556 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 557 sctp_ifap->ifn_p->ifn_name, ifn_index, 558 sctp_ifap); 559 if (new_ifn_af) { 560 /* Remove the created one that we don't want */ 561 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 562 } 563 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 564 /* easy to solve, just switch back to active */ 565 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 566 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 567 sctp_ifap->ifn_p = sctp_ifnp; 568 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 569 } 570 exit_stage_left: 571 SCTP_IPI_ADDR_WUNLOCK(); 572 return (sctp_ifap); 573 } else { 574 if (sctp_ifap->ifn_p) { 575 /* 576 * The last IFN gets the address, remove the 577 * old one 578 */ 579 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 580 sctp_ifap, sctp_ifap->ifn_p->ifn_name, 581 sctp_ifap->ifn_p->ifn_index, if_name, 582 ifn_index); 583 /* remove the address from the old ifn */ 584 sctp_remove_ifa_from_ifn(sctp_ifap); 585 /* move the address over to the new ifn */ 586 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 587 goto exit_stage_left; 588 } else { 589 /* repair ifnp which was NULL ? */ 590 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 591 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 592 sctp_ifnp, sctp_ifap); 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 } 595 goto exit_stage_left; 596 } 597 } 598 SCTP_IPI_ADDR_WUNLOCK(); 599 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 600 if (sctp_ifap == NULL) { 601 #ifdef INVARIANTS 602 panic("No memory for IFA"); 603 #endif 604 return (NULL); 605 } 606 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 607 sctp_ifap->ifn_p = sctp_ifnp; 608 atomic_add_int(&sctp_ifnp->refcount, 1); 609 sctp_ifap->vrf_id = vrf_id; 610 sctp_ifap->ifa = ifa; 611 memcpy(&sctp_ifap->address, addr, addr->sa_len); 612 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 613 sctp_ifap->flags = ifa_flags; 614 /* Set scope */ 615 switch (sctp_ifap->address.sa.sa_family) { 616 case AF_INET: 617 { 618 struct sockaddr_in *sin; 619 620 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 621 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 622 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 623 sctp_ifap->src_is_loop = 1; 624 } 625 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 626 sctp_ifap->src_is_priv = 1; 627 } 628 sctp_ifnp->num_v4++; 629 if (new_ifn_af) 630 new_ifn_af = AF_INET; 631 break; 632 } 633 #ifdef INET6 634 case AF_INET6: 635 { 636 /* ok to use deprecated addresses? */ 637 struct sockaddr_in6 *sin6; 638 639 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 640 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 641 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 642 sctp_ifap->src_is_loop = 1; 643 } 644 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 645 sctp_ifap->src_is_priv = 1; 646 } 647 sctp_ifnp->num_v6++; 648 if (new_ifn_af) 649 new_ifn_af = AF_INET6; 650 break; 651 } 652 #endif 653 default: 654 new_ifn_af = 0; 655 break; 656 } 657 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 658 659 if ((sctp_ifap->src_is_priv == 0) && 660 (sctp_ifap->src_is_loop == 0)) { 661 sctp_ifap->src_is_glob = 1; 662 } 663 SCTP_IPI_ADDR_WLOCK(); 664 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 665 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 666 sctp_ifap->refcount = 1; 667 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 668 sctp_ifnp->ifa_count++; 669 vrf->total_ifa_count++; 670 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 671 if (new_ifn_af) { 672 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 673 sctp_ifnp->registered_af = new_ifn_af; 674 } 675 SCTP_IPI_ADDR_WUNLOCK(); 676 if (dynamic_add) { 677 /* 678 * Bump up the refcount so that when the timer completes it 679 * will drop back down. 680 */ 681 struct sctp_laddr *wi; 682 683 atomic_add_int(&sctp_ifap->refcount, 1); 684 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 685 if (wi == NULL) { 686 /* 687 * Gak, what can we do? We have lost an address 688 * change can you say HOSED? 689 */ 690 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 691 /* Opps, must decrement the count */ 692 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 693 if_name); 694 return (NULL); 695 } 696 SCTP_INCR_LADDR_COUNT(); 697 bzero(wi, sizeof(*wi)); 698 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 699 wi->ifa = sctp_ifap; 700 wi->action = SCTP_ADD_IP_ADDRESS; 701 702 SCTP_WQ_ADDR_LOCK(); 703 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 704 SCTP_WQ_ADDR_UNLOCK(); 705 706 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 707 (struct sctp_inpcb *)NULL, 708 (struct sctp_tcb *)NULL, 709 (struct sctp_nets *)NULL); 710 } else { 711 /* it's ready for use */ 712 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 713 } 714 return (sctp_ifap); 715 } 716 717 void 718 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 719 uint32_t ifn_index, const char *if_name) 720 { 721 struct sctp_vrf *vrf; 722 struct sctp_ifa *sctp_ifap = NULL; 723 724 SCTP_IPI_ADDR_WLOCK(); 725 vrf = sctp_find_vrf(vrf_id); 726 if (vrf == NULL) { 727 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 728 goto out_now; 729 } 730 #ifdef SCTP_DEBUG 731 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 732 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 733 #endif 734 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 735 if (sctp_ifap) { 736 /* Validate the delete */ 737 if (sctp_ifap->ifn_p) { 738 int valid = 0; 739 740 /*- 741 * The name has priority over the ifn_index 742 * if its given. We do this especially for 743 * panda who might recycle indexes fast. 744 */ 745 if (if_name) { 746 int len1, len2; 747 748 len1 = min(SCTP_IFNAMSIZ, strlen(if_name)); 749 len2 = min(SCTP_IFNAMSIZ, strlen(sctp_ifap->ifn_p->ifn_name)); 750 if (len1 && len2 && (len1 == len2)) { 751 /* we can compare them */ 752 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, len1) == 0) { 753 /* 754 * They match its a correct 755 * delete 756 */ 757 valid = 1; 758 } 759 } 760 } 761 if (!valid) { 762 /* last ditch check ifn_index */ 763 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 764 valid = 1; 765 } 766 } 767 if (!valid) { 768 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 769 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 770 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 771 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 772 SCTP_IPI_ADDR_WUNLOCK(); 773 return; 774 } 775 } 776 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", sctp_ifap); 777 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 778 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 779 vrf->total_ifa_count--; 780 LIST_REMOVE(sctp_ifap, next_bucket); 781 sctp_remove_ifa_from_ifn(sctp_ifap); 782 } 783 #ifdef SCTP_DEBUG 784 else { 785 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 786 ifn_index); 787 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 788 } 789 #endif 790 791 out_now: 792 SCTP_IPI_ADDR_WUNLOCK(); 793 if (sctp_ifap) { 794 struct sctp_laddr *wi; 795 796 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 797 if (wi == NULL) { 798 /* 799 * Gak, what can we do? We have lost an address 800 * change can you say HOSED? 801 */ 802 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 803 804 /* Oops, must decrement the count */ 805 sctp_free_ifa(sctp_ifap); 806 return; 807 } 808 SCTP_INCR_LADDR_COUNT(); 809 bzero(wi, sizeof(*wi)); 810 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 811 wi->ifa = sctp_ifap; 812 wi->action = SCTP_DEL_IP_ADDRESS; 813 SCTP_WQ_ADDR_LOCK(); 814 /* 815 * Should this really be a tailq? As it is we will process 816 * the newest first :-0 817 */ 818 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 819 SCTP_WQ_ADDR_UNLOCK(); 820 821 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 822 (struct sctp_inpcb *)NULL, 823 (struct sctp_tcb *)NULL, 824 (struct sctp_nets *)NULL); 825 } 826 return; 827 } 828 829 830 static struct sctp_tcb * 831 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 832 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 833 { 834 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 835 /* 836 * If we support the TCP model, then we must now dig through to see 837 * if we can find our endpoint in the list of tcp ep's. 838 */ 839 uint16_t lport, rport; 840 struct sctppcbhead *ephead; 841 struct sctp_inpcb *inp; 842 struct sctp_laddr *laddr; 843 struct sctp_tcb *stcb; 844 struct sctp_nets *net; 845 846 if ((to == NULL) || (from == NULL)) { 847 return (NULL); 848 } 849 if (to->sa_family == AF_INET && from->sa_family == AF_INET) { 850 lport = ((struct sockaddr_in *)to)->sin_port; 851 rport = ((struct sockaddr_in *)from)->sin_port; 852 } else if (to->sa_family == AF_INET6 && from->sa_family == AF_INET6) { 853 lport = ((struct sockaddr_in6 *)to)->sin6_port; 854 rport = ((struct sockaddr_in6 *)from)->sin6_port; 855 } else { 856 return NULL; 857 } 858 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 859 /* 860 * Ok now for each of the guys in this bucket we must look and see: 861 * - Does the remote port match. - Does there single association's 862 * addresses match this address (to). If so we update p_ep to point 863 * to this ep and return the tcb from it. 864 */ 865 LIST_FOREACH(inp, ephead, sctp_hash) { 866 SCTP_INP_RLOCK(inp); 867 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 868 SCTP_INP_RUNLOCK(inp); 869 continue; 870 } 871 if (lport != inp->sctp_lport) { 872 SCTP_INP_RUNLOCK(inp); 873 continue; 874 } 875 if (inp->def_vrf_id != vrf_id) { 876 SCTP_INP_RUNLOCK(inp); 877 continue; 878 } 879 /* check to see if the ep has one of the addresses */ 880 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 881 /* We are NOT bound all, so look further */ 882 int match = 0; 883 884 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 885 886 if (laddr->ifa == NULL) { 887 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 888 continue; 889 } 890 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 891 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 892 continue; 893 } 894 if (laddr->ifa->address.sa.sa_family == 895 to->sa_family) { 896 /* see if it matches */ 897 struct sockaddr_in *intf_addr, *sin; 898 899 intf_addr = &laddr->ifa->address.sin; 900 sin = (struct sockaddr_in *)to; 901 if (from->sa_family == AF_INET) { 902 if (sin->sin_addr.s_addr == 903 intf_addr->sin_addr.s_addr) { 904 match = 1; 905 break; 906 } 907 } 908 #ifdef INET6 909 if (from->sa_family == AF_INET6) { 910 struct sockaddr_in6 *intf_addr6; 911 struct sockaddr_in6 *sin6; 912 913 sin6 = (struct sockaddr_in6 *) 914 to; 915 intf_addr6 = &laddr->ifa->address.sin6; 916 917 if (SCTP6_ARE_ADDR_EQUAL(sin6, 918 intf_addr6)) { 919 match = 1; 920 break; 921 } 922 } 923 #endif 924 } 925 } 926 if (match == 0) { 927 /* This endpoint does not have this address */ 928 SCTP_INP_RUNLOCK(inp); 929 continue; 930 } 931 } 932 /* 933 * Ok if we hit here the ep has the address, does it hold 934 * the tcb? 935 */ 936 937 stcb = LIST_FIRST(&inp->sctp_asoc_list); 938 if (stcb == NULL) { 939 SCTP_INP_RUNLOCK(inp); 940 continue; 941 } 942 SCTP_TCB_LOCK(stcb); 943 if (stcb->rport != rport) { 944 /* remote port does not match. */ 945 SCTP_TCB_UNLOCK(stcb); 946 SCTP_INP_RUNLOCK(inp); 947 continue; 948 } 949 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 950 SCTP_TCB_UNLOCK(stcb); 951 SCTP_INP_RUNLOCK(inp); 952 continue; 953 } 954 /* Does this TCB have a matching address? */ 955 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 956 957 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 958 /* not the same family, can't be a match */ 959 continue; 960 } 961 switch (from->sa_family) { 962 case AF_INET: 963 { 964 struct sockaddr_in *sin, *rsin; 965 966 sin = (struct sockaddr_in *)&net->ro._l_addr; 967 rsin = (struct sockaddr_in *)from; 968 if (sin->sin_addr.s_addr == 969 rsin->sin_addr.s_addr) { 970 /* found it */ 971 if (netp != NULL) { 972 *netp = net; 973 } 974 /* 975 * Update the endpoint 976 * pointer 977 */ 978 *inp_p = inp; 979 SCTP_INP_RUNLOCK(inp); 980 return (stcb); 981 } 982 break; 983 } 984 #ifdef INET6 985 case AF_INET6: 986 { 987 struct sockaddr_in6 *sin6, *rsin6; 988 989 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 990 rsin6 = (struct sockaddr_in6 *)from; 991 if (SCTP6_ARE_ADDR_EQUAL(sin6, 992 rsin6)) { 993 /* found it */ 994 if (netp != NULL) { 995 *netp = net; 996 } 997 /* 998 * Update the endpoint 999 * pointer 1000 */ 1001 *inp_p = inp; 1002 SCTP_INP_RUNLOCK(inp); 1003 return (stcb); 1004 } 1005 break; 1006 } 1007 #endif 1008 default: 1009 /* TSNH */ 1010 break; 1011 } 1012 } 1013 SCTP_TCB_UNLOCK(stcb); 1014 SCTP_INP_RUNLOCK(inp); 1015 } 1016 return (NULL); 1017 } 1018 1019 static int 1020 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 1021 { 1022 int loopback_scope, ipv4_local_scope, local_scope, site_scope; 1023 int ipv4_addr_legal, ipv6_addr_legal; 1024 struct sctp_vrf *vrf; 1025 struct sctp_ifn *sctp_ifn; 1026 struct sctp_ifa *sctp_ifa; 1027 1028 loopback_scope = stcb->asoc.loopback_scope; 1029 ipv4_local_scope = stcb->asoc.ipv4_local_scope; 1030 local_scope = stcb->asoc.local_scope; 1031 site_scope = stcb->asoc.site_scope; 1032 ipv4_addr_legal = ipv6_addr_legal = 0; 1033 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1034 ipv6_addr_legal = 1; 1035 if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) { 1036 ipv4_addr_legal = 1; 1037 } 1038 } else { 1039 ipv4_addr_legal = 1; 1040 } 1041 1042 SCTP_IPI_ADDR_RLOCK(); 1043 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 1044 if (vrf == NULL) { 1045 /* no vrf, no addresses */ 1046 SCTP_IPI_ADDR_RUNLOCK(); 1047 return (0); 1048 } 1049 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 1050 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 1051 if ((loopback_scope == 0) && 1052 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 1053 continue; 1054 } 1055 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 1056 if (sctp_is_addr_restricted(stcb, sctp_ifa)) 1057 continue; 1058 switch (sctp_ifa->address.sa.sa_family) { 1059 #ifdef INET 1060 case AF_INET: 1061 if (ipv4_addr_legal) { 1062 struct sockaddr_in *sin, 1063 *rsin; 1064 1065 sin = &sctp_ifa->address.sin; 1066 rsin = (struct sockaddr_in *)to; 1067 if ((ipv4_local_scope == 0) && 1068 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 1069 continue; 1070 } 1071 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1072 SCTP_IPI_ADDR_RUNLOCK(); 1073 return (1); 1074 } 1075 } 1076 break; 1077 #endif 1078 #ifdef INET6 1079 case AF_INET6: 1080 if (ipv6_addr_legal) { 1081 struct sockaddr_in6 *sin6, 1082 *rsin6; 1083 1084 sin6 = &sctp_ifa->address.sin6; 1085 rsin6 = (struct sockaddr_in6 *)to; 1086 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 1087 if (local_scope == 0) 1088 continue; 1089 if (sin6->sin6_scope_id == 0) { 1090 if (sa6_recoverscope(sin6) != 0) 1091 continue; 1092 } 1093 } 1094 if ((site_scope == 0) && 1095 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 1096 continue; 1097 } 1098 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1099 SCTP_IPI_ADDR_RUNLOCK(); 1100 return (1); 1101 } 1102 } 1103 break; 1104 #endif 1105 default: 1106 /* TSNH */ 1107 break; 1108 } 1109 } 1110 } 1111 } else { 1112 struct sctp_laddr *laddr; 1113 1114 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 1115 if (sctp_is_addr_restricted(stcb, laddr->ifa)) { 1116 continue; 1117 } 1118 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 1119 continue; 1120 } 1121 switch (to->sa_family) { 1122 #ifdef INET 1123 case AF_INET: 1124 { 1125 struct sockaddr_in *sin, *rsin; 1126 1127 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 1128 rsin = (struct sockaddr_in *)to; 1129 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 1130 SCTP_IPI_ADDR_RUNLOCK(); 1131 return (1); 1132 } 1133 break; 1134 } 1135 #endif 1136 #ifdef INET6 1137 case AF_INET6: 1138 { 1139 struct sockaddr_in6 *sin6, *rsin6; 1140 1141 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 1142 rsin6 = (struct sockaddr_in6 *)to; 1143 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 1144 SCTP_IPI_ADDR_RUNLOCK(); 1145 return (1); 1146 } 1147 break; 1148 } 1149 1150 #endif 1151 default: 1152 /* TSNH */ 1153 break; 1154 } 1155 1156 } 1157 } 1158 SCTP_IPI_ADDR_RUNLOCK(); 1159 return (0); 1160 } 1161 1162 /* 1163 * rules for use 1164 * 1165 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1166 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1167 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1168 * NULL. 1169 */ 1170 1171 struct sctp_tcb * 1172 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1173 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1174 { 1175 struct sctpasochead *head; 1176 struct sctp_inpcb *inp; 1177 struct sctp_tcb *stcb = NULL; 1178 struct sctp_nets *net; 1179 uint16_t rport; 1180 1181 inp = *inp_p; 1182 if (remote->sa_family == AF_INET) { 1183 rport = (((struct sockaddr_in *)remote)->sin_port); 1184 } else if (remote->sa_family == AF_INET6) { 1185 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1186 } else { 1187 return (NULL); 1188 } 1189 if (locked_tcb) { 1190 /* 1191 * UN-lock so we can do proper locking here this occurs when 1192 * called from load_addresses_from_init. 1193 */ 1194 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1195 SCTP_TCB_UNLOCK(locked_tcb); 1196 } 1197 SCTP_INP_INFO_RLOCK(); 1198 if (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) { 1199 /*- 1200 * Now either this guy is our listener or it's the 1201 * connector. If it is the one that issued the connect, then 1202 * it's only chance is to be the first TCB in the list. If 1203 * it is the acceptor, then do the special_lookup to hash 1204 * and find the real inp. 1205 */ 1206 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1207 /* to is peer addr, from is my addr */ 1208 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1209 netp, inp->def_vrf_id); 1210 if ((stcb != NULL) && (locked_tcb == NULL)) { 1211 /* we have a locked tcb, lower refcount */ 1212 SCTP_INP_DECR_REF(inp); 1213 } 1214 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1215 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1216 SCTP_TCB_LOCK(locked_tcb); 1217 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1218 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1219 } 1220 SCTP_INP_INFO_RUNLOCK(); 1221 return (stcb); 1222 } else { 1223 SCTP_INP_WLOCK(inp); 1224 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1225 goto null_return; 1226 } 1227 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1228 if (stcb == NULL) { 1229 goto null_return; 1230 } 1231 SCTP_TCB_LOCK(stcb); 1232 1233 if (stcb->rport != rport) { 1234 /* remote port does not match. */ 1235 SCTP_TCB_UNLOCK(stcb); 1236 goto null_return; 1237 } 1238 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1239 SCTP_TCB_UNLOCK(stcb); 1240 goto null_return; 1241 } 1242 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1243 SCTP_TCB_UNLOCK(stcb); 1244 goto null_return; 1245 } 1246 /* now look at the list of remote addresses */ 1247 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1248 #ifdef INVARIANTS 1249 if (net == (TAILQ_NEXT(net, sctp_next))) { 1250 panic("Corrupt net list"); 1251 } 1252 #endif 1253 if (net->ro._l_addr.sa.sa_family != 1254 remote->sa_family) { 1255 /* not the same family */ 1256 continue; 1257 } 1258 switch (remote->sa_family) { 1259 case AF_INET: 1260 { 1261 struct sockaddr_in *sin, 1262 *rsin; 1263 1264 sin = (struct sockaddr_in *) 1265 &net->ro._l_addr; 1266 rsin = (struct sockaddr_in *)remote; 1267 if (sin->sin_addr.s_addr == 1268 rsin->sin_addr.s_addr) { 1269 /* found it */ 1270 if (netp != NULL) { 1271 *netp = net; 1272 } 1273 if (locked_tcb == NULL) { 1274 SCTP_INP_DECR_REF(inp); 1275 } else if (locked_tcb != stcb) { 1276 SCTP_TCB_LOCK(locked_tcb); 1277 } 1278 if (locked_tcb) { 1279 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1280 } 1281 SCTP_INP_WUNLOCK(inp); 1282 SCTP_INP_INFO_RUNLOCK(); 1283 return (stcb); 1284 } 1285 break; 1286 } 1287 #ifdef INET6 1288 case AF_INET6: 1289 { 1290 struct sockaddr_in6 *sin6, 1291 *rsin6; 1292 1293 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1294 rsin6 = (struct sockaddr_in6 *)remote; 1295 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1296 rsin6)) { 1297 /* found it */ 1298 if (netp != NULL) { 1299 *netp = net; 1300 } 1301 if (locked_tcb == NULL) { 1302 SCTP_INP_DECR_REF(inp); 1303 } else if (locked_tcb != stcb) { 1304 SCTP_TCB_LOCK(locked_tcb); 1305 } 1306 if (locked_tcb) { 1307 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1308 } 1309 SCTP_INP_WUNLOCK(inp); 1310 SCTP_INP_INFO_RUNLOCK(); 1311 return (stcb); 1312 } 1313 break; 1314 } 1315 #endif 1316 default: 1317 /* TSNH */ 1318 break; 1319 } 1320 } 1321 SCTP_TCB_UNLOCK(stcb); 1322 } 1323 } else { 1324 SCTP_INP_WLOCK(inp); 1325 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1326 goto null_return; 1327 } 1328 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1329 inp->sctp_hashmark)]; 1330 if (head == NULL) { 1331 goto null_return; 1332 } 1333 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1334 if (stcb->rport != rport) { 1335 /* remote port does not match */ 1336 continue; 1337 } 1338 SCTP_TCB_LOCK(stcb); 1339 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1340 SCTP_TCB_UNLOCK(stcb); 1341 continue; 1342 } 1343 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1344 SCTP_TCB_UNLOCK(stcb); 1345 continue; 1346 } 1347 /* now look at the list of remote addresses */ 1348 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1349 #ifdef INVARIANTS 1350 if (net == (TAILQ_NEXT(net, sctp_next))) { 1351 panic("Corrupt net list"); 1352 } 1353 #endif 1354 if (net->ro._l_addr.sa.sa_family != 1355 remote->sa_family) { 1356 /* not the same family */ 1357 continue; 1358 } 1359 switch (remote->sa_family) { 1360 case AF_INET: 1361 { 1362 struct sockaddr_in *sin, 1363 *rsin; 1364 1365 sin = (struct sockaddr_in *) 1366 &net->ro._l_addr; 1367 rsin = (struct sockaddr_in *)remote; 1368 if (sin->sin_addr.s_addr == 1369 rsin->sin_addr.s_addr) { 1370 /* found it */ 1371 if (netp != NULL) { 1372 *netp = net; 1373 } 1374 if (locked_tcb == NULL) { 1375 SCTP_INP_DECR_REF(inp); 1376 } else if (locked_tcb != stcb) { 1377 SCTP_TCB_LOCK(locked_tcb); 1378 } 1379 if (locked_tcb) { 1380 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1381 } 1382 SCTP_INP_WUNLOCK(inp); 1383 SCTP_INP_INFO_RUNLOCK(); 1384 return (stcb); 1385 } 1386 break; 1387 } 1388 #ifdef INET6 1389 case AF_INET6: 1390 { 1391 struct sockaddr_in6 *sin6, 1392 *rsin6; 1393 1394 sin6 = (struct sockaddr_in6 *) 1395 &net->ro._l_addr; 1396 rsin6 = (struct sockaddr_in6 *)remote; 1397 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1398 rsin6)) { 1399 /* found it */ 1400 if (netp != NULL) { 1401 *netp = net; 1402 } 1403 if (locked_tcb == NULL) { 1404 SCTP_INP_DECR_REF(inp); 1405 } else if (locked_tcb != stcb) { 1406 SCTP_TCB_LOCK(locked_tcb); 1407 } 1408 if (locked_tcb) { 1409 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1410 } 1411 SCTP_INP_WUNLOCK(inp); 1412 SCTP_INP_INFO_RUNLOCK(); 1413 return (stcb); 1414 } 1415 break; 1416 } 1417 #endif 1418 default: 1419 /* TSNH */ 1420 break; 1421 } 1422 } 1423 SCTP_TCB_UNLOCK(stcb); 1424 } 1425 } 1426 null_return: 1427 /* clean up for returning null */ 1428 if (locked_tcb) { 1429 SCTP_TCB_LOCK(locked_tcb); 1430 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1431 } 1432 SCTP_INP_WUNLOCK(inp); 1433 SCTP_INP_INFO_RUNLOCK(); 1434 /* not found */ 1435 return (NULL); 1436 } 1437 1438 /* 1439 * Find an association for a specific endpoint using the association id given 1440 * out in the COMM_UP notification 1441 */ 1442 1443 struct sctp_tcb * 1444 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1445 { 1446 /* 1447 * Use my the assoc_id to find a endpoint 1448 */ 1449 struct sctpasochead *head; 1450 struct sctp_tcb *stcb; 1451 uint32_t id; 1452 1453 if (inp == NULL) { 1454 SCTP_PRINTF("TSNH ep_associd\n"); 1455 return (NULL); 1456 } 1457 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1458 SCTP_PRINTF("TSNH ep_associd0\n"); 1459 return (NULL); 1460 } 1461 id = (uint32_t) asoc_id; 1462 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1463 if (head == NULL) { 1464 /* invalid id TSNH */ 1465 SCTP_PRINTF("TSNH ep_associd1\n"); 1466 return (NULL); 1467 } 1468 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1469 if (stcb->asoc.assoc_id == id) { 1470 if (inp != stcb->sctp_ep) { 1471 /* 1472 * some other guy has the same id active (id 1473 * collision ??). 1474 */ 1475 SCTP_PRINTF("TSNH ep_associd2\n"); 1476 continue; 1477 } 1478 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1479 continue; 1480 } 1481 if (want_lock) { 1482 SCTP_TCB_LOCK(stcb); 1483 } 1484 return (stcb); 1485 } 1486 } 1487 return (NULL); 1488 } 1489 1490 1491 struct sctp_tcb * 1492 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1493 { 1494 struct sctp_tcb *stcb; 1495 1496 SCTP_INP_RLOCK(inp); 1497 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1498 SCTP_INP_RUNLOCK(inp); 1499 return (stcb); 1500 } 1501 1502 1503 static struct sctp_inpcb * 1504 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1505 uint16_t lport, uint32_t vrf_id) 1506 { 1507 struct sctp_inpcb *inp; 1508 struct sockaddr_in *sin; 1509 1510 #ifdef INET6 1511 struct sockaddr_in6 *sin6; 1512 1513 #endif 1514 struct sctp_laddr *laddr; 1515 1516 #ifdef INET6 1517 struct sockaddr_in6 *intf_addr6; 1518 1519 #endif 1520 1521 int fnd; 1522 1523 /* 1524 * Endpoint probe expects that the INP_INFO is locked. 1525 */ 1526 sin = NULL; 1527 #ifdef INET6 1528 sin6 = NULL; 1529 #endif 1530 switch (nam->sa_family) { 1531 case AF_INET: 1532 sin = (struct sockaddr_in *)nam; 1533 break; 1534 #ifdef INET6 1535 case AF_INET6: 1536 sin6 = (struct sockaddr_in6 *)nam; 1537 break; 1538 #endif 1539 default: 1540 /* unsupported family */ 1541 return (NULL); 1542 } 1543 1544 if (head == NULL) 1545 return (NULL); 1546 1547 LIST_FOREACH(inp, head, sctp_hash) { 1548 SCTP_INP_RLOCK(inp); 1549 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1550 SCTP_INP_RUNLOCK(inp); 1551 continue; 1552 } 1553 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1554 (inp->sctp_lport == lport)) { 1555 /* got it */ 1556 if ((nam->sa_family == AF_INET) && 1557 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1558 SCTP_IPV6_V6ONLY(inp)) { 1559 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1560 SCTP_INP_RUNLOCK(inp); 1561 continue; 1562 } 1563 /* A V6 address and the endpoint is NOT bound V6 */ 1564 if (nam->sa_family == AF_INET6 && 1565 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1566 SCTP_INP_RUNLOCK(inp); 1567 continue; 1568 } 1569 /* does a VRF id match? */ 1570 fnd = 0; 1571 if (inp->def_vrf_id == vrf_id) 1572 fnd = 1; 1573 1574 SCTP_INP_RUNLOCK(inp); 1575 if (!fnd) 1576 continue; 1577 return (inp); 1578 } 1579 SCTP_INP_RUNLOCK(inp); 1580 } 1581 if ((nam->sa_family == AF_INET) && 1582 (sin->sin_addr.s_addr == INADDR_ANY)) { 1583 /* Can't hunt for one that has no address specified */ 1584 return (NULL); 1585 } 1586 #ifdef INET6 1587 if ((nam->sa_family == AF_INET6) && 1588 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 1589 /* Can't hunt for one that has no address specified */ 1590 return (NULL); 1591 } 1592 #endif 1593 /* 1594 * ok, not bound to all so see if we can find a EP bound to this 1595 * address. 1596 */ 1597 LIST_FOREACH(inp, head, sctp_hash) { 1598 SCTP_INP_RLOCK(inp); 1599 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1600 SCTP_INP_RUNLOCK(inp); 1601 continue; 1602 } 1603 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1604 SCTP_INP_RUNLOCK(inp); 1605 continue; 1606 } 1607 /* 1608 * Ok this could be a likely candidate, look at all of its 1609 * addresses 1610 */ 1611 if (inp->sctp_lport != lport) { 1612 SCTP_INP_RUNLOCK(inp); 1613 continue; 1614 } 1615 /* does a VRF id match? */ 1616 fnd = 0; 1617 if (inp->def_vrf_id == vrf_id) 1618 fnd = 1; 1619 1620 if (!fnd) { 1621 SCTP_INP_RUNLOCK(inp); 1622 continue; 1623 } 1624 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1625 if (laddr->ifa == NULL) { 1626 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1627 __FUNCTION__); 1628 continue; 1629 } 1630 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1631 laddr->ifa); 1632 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1633 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1634 continue; 1635 } 1636 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1637 /* possible, see if it matches */ 1638 struct sockaddr_in *intf_addr; 1639 1640 intf_addr = &laddr->ifa->address.sin; 1641 switch (nam->sa_family) { 1642 case AF_INET: 1643 if (sin->sin_addr.s_addr == 1644 intf_addr->sin_addr.s_addr) { 1645 SCTP_INP_RUNLOCK(inp); 1646 return (inp); 1647 } 1648 break; 1649 #ifdef INET6 1650 case AF_INET6: 1651 intf_addr6 = &laddr->ifa->address.sin6; 1652 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1653 intf_addr6)) { 1654 SCTP_INP_RUNLOCK(inp); 1655 return (inp); 1656 } 1657 break; 1658 #endif 1659 } 1660 } 1661 } 1662 SCTP_INP_RUNLOCK(inp); 1663 } 1664 return (NULL); 1665 } 1666 1667 1668 static struct sctp_inpcb * 1669 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1670 { 1671 struct sctppcbhead *head; 1672 struct sctp_inpcb *t_inp; 1673 int fnd; 1674 1675 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1676 SCTP_BASE_INFO(hashmark))]; 1677 LIST_FOREACH(t_inp, head, sctp_hash) { 1678 if (t_inp->sctp_lport != lport) { 1679 continue; 1680 } 1681 /* is it in the VRF in question */ 1682 fnd = 0; 1683 if (t_inp->def_vrf_id == vrf_id) 1684 fnd = 1; 1685 if (!fnd) 1686 continue; 1687 1688 /* This one is in use. */ 1689 /* check the v6/v4 binding issue */ 1690 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1691 SCTP_IPV6_V6ONLY(t_inp)) { 1692 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1693 /* collision in V6 space */ 1694 return (t_inp); 1695 } else { 1696 /* inp is BOUND_V4 no conflict */ 1697 continue; 1698 } 1699 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1700 /* t_inp is bound v4 and v6, conflict always */ 1701 return (t_inp); 1702 } else { 1703 /* t_inp is bound only V4 */ 1704 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1705 SCTP_IPV6_V6ONLY(inp)) { 1706 /* no conflict */ 1707 continue; 1708 } 1709 /* else fall through to conflict */ 1710 } 1711 return (t_inp); 1712 } 1713 return (NULL); 1714 } 1715 1716 1717 int 1718 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1719 { 1720 /* For 1-2-1 with port reuse */ 1721 struct sctppcbhead *head; 1722 struct sctp_inpcb *tinp; 1723 1724 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1725 /* only works with port reuse on */ 1726 return (-1); 1727 } 1728 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1729 return (0); 1730 } 1731 SCTP_INP_RUNLOCK(inp); 1732 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1733 SCTP_BASE_INFO(hashmark))]; 1734 /* Kick out all non-listeners to the TCP hash */ 1735 LIST_FOREACH(tinp, head, sctp_hash) { 1736 if (tinp->sctp_lport != inp->sctp_lport) { 1737 continue; 1738 } 1739 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1740 continue; 1741 } 1742 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1743 continue; 1744 } 1745 if (tinp->sctp_socket->so_qlimit) { 1746 continue; 1747 } 1748 SCTP_INP_WLOCK(tinp); 1749 LIST_REMOVE(tinp, sctp_hash); 1750 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1751 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1752 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1753 SCTP_INP_WUNLOCK(tinp); 1754 } 1755 SCTP_INP_WLOCK(inp); 1756 /* Pull from where he was */ 1757 LIST_REMOVE(inp, sctp_hash); 1758 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1759 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1760 LIST_INSERT_HEAD(head, inp, sctp_hash); 1761 SCTP_INP_WUNLOCK(inp); 1762 SCTP_INP_RLOCK(inp); 1763 return (0); 1764 } 1765 1766 1767 struct sctp_inpcb * 1768 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1769 uint32_t vrf_id) 1770 { 1771 /* 1772 * First we check the hash table to see if someone has this port 1773 * bound with just the port. 1774 */ 1775 struct sctp_inpcb *inp; 1776 struct sctppcbhead *head; 1777 struct sockaddr_in *sin; 1778 struct sockaddr_in6 *sin6; 1779 int lport; 1780 unsigned int i; 1781 1782 if (nam->sa_family == AF_INET) { 1783 sin = (struct sockaddr_in *)nam; 1784 lport = ((struct sockaddr_in *)nam)->sin_port; 1785 } else if (nam->sa_family == AF_INET6) { 1786 sin6 = (struct sockaddr_in6 *)nam; 1787 lport = ((struct sockaddr_in6 *)nam)->sin6_port; 1788 } else { 1789 /* unsupported family */ 1790 return (NULL); 1791 } 1792 /* 1793 * I could cheat here and just cast to one of the types but we will 1794 * do it right. It also provides the check against an Unsupported 1795 * type too. 1796 */ 1797 /* Find the head of the ALLADDR chain */ 1798 if (have_lock == 0) { 1799 SCTP_INP_INFO_RLOCK(); 1800 } 1801 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1802 SCTP_BASE_INFO(hashmark))]; 1803 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1804 1805 /* 1806 * If the TCP model exists it could be that the main listening 1807 * endpoint is gone but there still exists a connected socket for 1808 * this guy. If so we can return the first one that we find. This 1809 * may NOT be the correct one so the caller should be wary on the 1810 * returned INP. Currently the only caller that sets find_tcp_pool 1811 * is in bindx where we are verifying that a user CAN bind the 1812 * address. He either has bound it already, or someone else has, or 1813 * its open to bind, so this is good enough. 1814 */ 1815 if (inp == NULL && find_tcp_pool) { 1816 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1817 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1818 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1819 if (inp) { 1820 break; 1821 } 1822 } 1823 } 1824 if (inp) { 1825 SCTP_INP_INCR_REF(inp); 1826 } 1827 if (have_lock == 0) { 1828 SCTP_INP_INFO_RUNLOCK(); 1829 } 1830 return (inp); 1831 } 1832 1833 /* 1834 * Find an association for an endpoint with the pointer to whom you want to 1835 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1836 * need to change the *to to some other struct like a mbuf... 1837 */ 1838 struct sctp_tcb * 1839 sctp_findassociation_addr_sa(struct sockaddr *to, struct sockaddr *from, 1840 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1841 uint32_t vrf_id) 1842 { 1843 struct sctp_inpcb *inp = NULL; 1844 struct sctp_tcb *retval; 1845 1846 SCTP_INP_INFO_RLOCK(); 1847 if (find_tcp_pool) { 1848 if (inp_p != NULL) { 1849 retval = sctp_tcb_special_locate(inp_p, from, to, netp, 1850 vrf_id); 1851 } else { 1852 retval = sctp_tcb_special_locate(&inp, from, to, netp, 1853 vrf_id); 1854 } 1855 if (retval != NULL) { 1856 SCTP_INP_INFO_RUNLOCK(); 1857 return (retval); 1858 } 1859 } 1860 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1861 if (inp_p != NULL) { 1862 *inp_p = inp; 1863 } 1864 SCTP_INP_INFO_RUNLOCK(); 1865 1866 if (inp == NULL) { 1867 return (NULL); 1868 } 1869 /* 1870 * ok, we have an endpoint, now lets find the assoc for it (if any) 1871 * we now place the source address or from in the to of the find 1872 * endpoint call. Since in reality this chain is used from the 1873 * inbound packet side. 1874 */ 1875 if (inp_p != NULL) { 1876 retval = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1877 NULL); 1878 } else { 1879 retval = sctp_findassociation_ep_addr(&inp, from, netp, to, 1880 NULL); 1881 } 1882 return retval; 1883 } 1884 1885 1886 /* 1887 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1888 * find all addresses that the sender has specified in any address list. Each 1889 * address will be used to lookup the TCB and see if one exits. 1890 */ 1891 static struct sctp_tcb * 1892 sctp_findassociation_special_addr(struct mbuf *m, int iphlen, int offset, 1893 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1894 struct sockaddr *dest) 1895 { 1896 struct sockaddr_in sin4; 1897 struct sockaddr_in6 sin6; 1898 struct sctp_paramhdr *phdr, parm_buf; 1899 struct sctp_tcb *retval; 1900 uint32_t ptype, plen; 1901 1902 memset(&sin4, 0, sizeof(sin4)); 1903 memset(&sin6, 0, sizeof(sin6)); 1904 sin4.sin_len = sizeof(sin4); 1905 sin4.sin_family = AF_INET; 1906 sin4.sin_port = sh->src_port; 1907 sin6.sin6_len = sizeof(sin6); 1908 sin6.sin6_family = AF_INET6; 1909 sin6.sin6_port = sh->src_port; 1910 1911 retval = NULL; 1912 offset += sizeof(struct sctp_init_chunk); 1913 1914 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 1915 while (phdr != NULL) { 1916 /* now we must see if we want the parameter */ 1917 ptype = ntohs(phdr->param_type); 1918 plen = ntohs(phdr->param_length); 1919 if (plen == 0) { 1920 break; 1921 } 1922 if (ptype == SCTP_IPV4_ADDRESS && 1923 plen == sizeof(struct sctp_ipv4addr_param)) { 1924 /* Get the rest of the address */ 1925 struct sctp_ipv4addr_param ip4_parm, *p4; 1926 1927 phdr = sctp_get_next_param(m, offset, 1928 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 1929 if (phdr == NULL) { 1930 return (NULL); 1931 } 1932 p4 = (struct sctp_ipv4addr_param *)phdr; 1933 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 1934 /* look it up */ 1935 retval = sctp_findassociation_ep_addr(inp_p, 1936 (struct sockaddr *)&sin4, netp, dest, NULL); 1937 if (retval != NULL) { 1938 return (retval); 1939 } 1940 } else if (ptype == SCTP_IPV6_ADDRESS && 1941 plen == sizeof(struct sctp_ipv6addr_param)) { 1942 /* Get the rest of the address */ 1943 struct sctp_ipv6addr_param ip6_parm, *p6; 1944 1945 phdr = sctp_get_next_param(m, offset, 1946 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 1947 if (phdr == NULL) { 1948 return (NULL); 1949 } 1950 p6 = (struct sctp_ipv6addr_param *)phdr; 1951 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 1952 /* look it up */ 1953 retval = sctp_findassociation_ep_addr(inp_p, 1954 (struct sockaddr *)&sin6, netp, dest, NULL); 1955 if (retval != NULL) { 1956 return (retval); 1957 } 1958 } 1959 offset += SCTP_SIZE32(plen); 1960 phdr = sctp_get_next_param(m, offset, &parm_buf, 1961 sizeof(parm_buf)); 1962 } 1963 return (NULL); 1964 } 1965 1966 static struct sctp_tcb * 1967 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 1968 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 1969 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 1970 { 1971 /* 1972 * Use my vtag to hash. If we find it we then verify the source addr 1973 * is in the assoc. If all goes well we save a bit on rec of a 1974 * packet. 1975 */ 1976 struct sctpasochead *head; 1977 struct sctp_nets *net; 1978 struct sctp_tcb *stcb; 1979 1980 *netp = NULL; 1981 *inp_p = NULL; 1982 SCTP_INP_INFO_RLOCK(); 1983 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 1984 SCTP_BASE_INFO(hashasocmark))]; 1985 if (head == NULL) { 1986 /* invalid vtag */ 1987 SCTP_INP_INFO_RUNLOCK(); 1988 return (NULL); 1989 } 1990 LIST_FOREACH(stcb, head, sctp_asocs) { 1991 SCTP_INP_RLOCK(stcb->sctp_ep); 1992 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1993 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1994 continue; 1995 } 1996 SCTP_TCB_LOCK(stcb); 1997 SCTP_INP_RUNLOCK(stcb->sctp_ep); 1998 if (stcb->asoc.my_vtag == vtag) { 1999 /* candidate */ 2000 if (stcb->rport != rport) { 2001 SCTP_TCB_UNLOCK(stcb); 2002 continue; 2003 } 2004 if (stcb->sctp_ep->sctp_lport != lport) { 2005 SCTP_TCB_UNLOCK(stcb); 2006 continue; 2007 } 2008 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2009 SCTP_TCB_UNLOCK(stcb); 2010 continue; 2011 } 2012 /* RRS:Need toaddr check here */ 2013 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2014 /* Endpoint does not own this address */ 2015 SCTP_TCB_UNLOCK(stcb); 2016 continue; 2017 } 2018 if (remote_tag) { 2019 /* 2020 * If we have both vtags that's all we match 2021 * on 2022 */ 2023 if (stcb->asoc.peer_vtag == remote_tag) { 2024 /* 2025 * If both tags match we consider it 2026 * conclusive and check NO 2027 * source/destination addresses 2028 */ 2029 goto conclusive; 2030 } 2031 } 2032 if (skip_src_check) { 2033 conclusive: 2034 if (from) { 2035 net = sctp_findnet(stcb, from); 2036 } else { 2037 *netp = NULL; /* unknown */ 2038 } 2039 if (inp_p) 2040 *inp_p = stcb->sctp_ep; 2041 SCTP_INP_INFO_RUNLOCK(); 2042 return (stcb); 2043 } 2044 net = sctp_findnet(stcb, from); 2045 if (net) { 2046 /* yep its him. */ 2047 *netp = net; 2048 SCTP_STAT_INCR(sctps_vtagexpress); 2049 *inp_p = stcb->sctp_ep; 2050 SCTP_INP_INFO_RUNLOCK(); 2051 return (stcb); 2052 } else { 2053 /* 2054 * not him, this should only happen in rare 2055 * cases so I peg it. 2056 */ 2057 SCTP_STAT_INCR(sctps_vtagbogus); 2058 } 2059 } 2060 SCTP_TCB_UNLOCK(stcb); 2061 } 2062 SCTP_INP_INFO_RUNLOCK(); 2063 return (NULL); 2064 } 2065 2066 /* 2067 * Find an association with the pointer to the inbound IP packet. This can be 2068 * a IPv4 or IPv6 packet. 2069 */ 2070 struct sctp_tcb * 2071 sctp_findassociation_addr(struct mbuf *m, int iphlen, int offset, 2072 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2073 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2074 { 2075 int find_tcp_pool; 2076 struct ip *iph; 2077 struct sctp_tcb *retval; 2078 struct sockaddr_storage to_store, from_store; 2079 struct sockaddr *to = (struct sockaddr *)&to_store; 2080 struct sockaddr *from = (struct sockaddr *)&from_store; 2081 struct sctp_inpcb *inp; 2082 2083 iph = mtod(m, struct ip *); 2084 switch (iph->ip_v) { 2085 case IPVERSION: 2086 { 2087 /* its IPv4 */ 2088 struct sockaddr_in *from4; 2089 2090 from4 = (struct sockaddr_in *)&from_store; 2091 bzero(from4, sizeof(*from4)); 2092 from4->sin_family = AF_INET; 2093 from4->sin_len = sizeof(struct sockaddr_in); 2094 from4->sin_addr.s_addr = iph->ip_src.s_addr; 2095 from4->sin_port = sh->src_port; 2096 break; 2097 } 2098 #ifdef INET6 2099 case IPV6_VERSION >> 4: 2100 { 2101 /* its IPv6 */ 2102 struct ip6_hdr *ip6; 2103 struct sockaddr_in6 *from6; 2104 2105 ip6 = mtod(m, struct ip6_hdr *); 2106 from6 = (struct sockaddr_in6 *)&from_store; 2107 bzero(from6, sizeof(*from6)); 2108 from6->sin6_family = AF_INET6; 2109 from6->sin6_len = sizeof(struct sockaddr_in6); 2110 from6->sin6_addr = ip6->ip6_src; 2111 from6->sin6_port = sh->src_port; 2112 /* Get the scopes in properly to the sin6 addr's */ 2113 /* we probably don't need these operations */ 2114 (void)sa6_recoverscope(from6); 2115 sa6_embedscope(from6, MODULE_GLOBAL(ip6_use_defzone)); 2116 break; 2117 } 2118 #endif 2119 default: 2120 /* Currently not supported. */ 2121 return (NULL); 2122 } 2123 2124 2125 switch (iph->ip_v) { 2126 case IPVERSION: 2127 { 2128 /* its IPv4 */ 2129 struct sockaddr_in *to4; 2130 2131 to4 = (struct sockaddr_in *)&to_store; 2132 bzero(to4, sizeof(*to4)); 2133 to4->sin_family = AF_INET; 2134 to4->sin_len = sizeof(struct sockaddr_in); 2135 to4->sin_addr.s_addr = iph->ip_dst.s_addr; 2136 to4->sin_port = sh->dest_port; 2137 break; 2138 } 2139 #ifdef INET6 2140 case IPV6_VERSION >> 4: 2141 { 2142 /* its IPv6 */ 2143 struct ip6_hdr *ip6; 2144 struct sockaddr_in6 *to6; 2145 2146 ip6 = mtod(m, struct ip6_hdr *); 2147 to6 = (struct sockaddr_in6 *)&to_store; 2148 bzero(to6, sizeof(*to6)); 2149 to6->sin6_family = AF_INET6; 2150 to6->sin6_len = sizeof(struct sockaddr_in6); 2151 to6->sin6_addr = ip6->ip6_dst; 2152 to6->sin6_port = sh->dest_port; 2153 /* Get the scopes in properly to the sin6 addr's */ 2154 /* we probably don't need these operations */ 2155 (void)sa6_recoverscope(to6); 2156 sa6_embedscope(to6, MODULE_GLOBAL(ip6_use_defzone)); 2157 break; 2158 } 2159 #endif 2160 default: 2161 /* TSNH */ 2162 break; 2163 } 2164 if (sh->v_tag) { 2165 /* we only go down this path if vtag is non-zero */ 2166 retval = sctp_findassoc_by_vtag(from, to, ntohl(sh->v_tag), 2167 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2168 if (retval) { 2169 return (retval); 2170 } 2171 } 2172 find_tcp_pool = 0; 2173 if ((ch->chunk_type != SCTP_INITIATION) && 2174 (ch->chunk_type != SCTP_INITIATION_ACK) && 2175 (ch->chunk_type != SCTP_COOKIE_ACK) && 2176 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2177 /* Other chunk types go to the tcp pool. */ 2178 find_tcp_pool = 1; 2179 } 2180 if (inp_p) { 2181 retval = sctp_findassociation_addr_sa(to, from, inp_p, netp, 2182 find_tcp_pool, vrf_id); 2183 inp = *inp_p; 2184 } else { 2185 retval = sctp_findassociation_addr_sa(to, from, &inp, netp, 2186 find_tcp_pool, vrf_id); 2187 } 2188 SCTPDBG(SCTP_DEBUG_PCB1, "retval:%p inp:%p\n", retval, inp); 2189 if (retval == NULL && inp) { 2190 /* Found a EP but not this address */ 2191 if ((ch->chunk_type == SCTP_INITIATION) || 2192 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2193 /*- 2194 * special hook, we do NOT return linp or an 2195 * association that is linked to an existing 2196 * association that is under the TCP pool (i.e. no 2197 * listener exists). The endpoint finding routine 2198 * will always find a listener before examining the 2199 * TCP pool. 2200 */ 2201 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2202 if (inp_p) { 2203 *inp_p = NULL; 2204 } 2205 return (NULL); 2206 } 2207 retval = sctp_findassociation_special_addr(m, iphlen, 2208 offset, sh, &inp, netp, to); 2209 if (inp_p != NULL) { 2210 *inp_p = inp; 2211 } 2212 } 2213 } 2214 SCTPDBG(SCTP_DEBUG_PCB1, "retval is %p\n", retval); 2215 return (retval); 2216 } 2217 2218 /* 2219 * lookup an association by an ASCONF lookup address. 2220 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2221 */ 2222 struct sctp_tcb * 2223 sctp_findassociation_ep_asconf(struct mbuf *m, int iphlen, int offset, 2224 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2225 { 2226 struct sctp_tcb *stcb; 2227 struct sockaddr_in *sin; 2228 2229 #ifdef INET6 2230 struct sockaddr_in6 *sin6; 2231 2232 #endif 2233 struct sockaddr_storage local_store, remote_store; 2234 struct sockaddr *to; 2235 struct ip *iph; 2236 2237 #ifdef INET6 2238 struct ip6_hdr *ip6; 2239 2240 #endif 2241 struct sctp_paramhdr parm_buf, *phdr; 2242 int ptype; 2243 int zero_address = 0; 2244 2245 2246 memset(&local_store, 0, sizeof(local_store)); 2247 memset(&remote_store, 0, sizeof(remote_store)); 2248 to = (struct sockaddr *)&local_store; 2249 /* First get the destination address setup too. */ 2250 iph = mtod(m, struct ip *); 2251 switch (iph->ip_v) { 2252 case IPVERSION: 2253 /* its IPv4 */ 2254 sin = (struct sockaddr_in *)&local_store; 2255 sin->sin_family = AF_INET; 2256 sin->sin_len = sizeof(*sin); 2257 sin->sin_port = sh->dest_port; 2258 sin->sin_addr.s_addr = iph->ip_dst.s_addr; 2259 break; 2260 #ifdef INET6 2261 case IPV6_VERSION >> 4: 2262 /* its IPv6 */ 2263 ip6 = mtod(m, struct ip6_hdr *); 2264 sin6 = (struct sockaddr_in6 *)&local_store; 2265 sin6->sin6_family = AF_INET6; 2266 sin6->sin6_len = sizeof(*sin6); 2267 sin6->sin6_port = sh->dest_port; 2268 sin6->sin6_addr = ip6->ip6_dst; 2269 break; 2270 #endif 2271 default: 2272 return NULL; 2273 } 2274 2275 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2276 &parm_buf, sizeof(struct sctp_paramhdr)); 2277 if (phdr == NULL) { 2278 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2279 __FUNCTION__); 2280 return NULL; 2281 } 2282 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2283 /* get the correlation address */ 2284 switch (ptype) { 2285 #ifdef INET6 2286 case SCTP_IPV6_ADDRESS: 2287 { 2288 /* ipv6 address param */ 2289 struct sctp_ipv6addr_param *p6, p6_buf; 2290 2291 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2292 return NULL; 2293 } 2294 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2295 offset + sizeof(struct sctp_asconf_chunk), 2296 &p6_buf.ph, sizeof(*p6)); 2297 if (p6 == NULL) { 2298 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2299 __FUNCTION__); 2300 return (NULL); 2301 } 2302 sin6 = (struct sockaddr_in6 *)&remote_store; 2303 sin6->sin6_family = AF_INET6; 2304 sin6->sin6_len = sizeof(*sin6); 2305 sin6->sin6_port = sh->src_port; 2306 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2307 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2308 zero_address = 1; 2309 break; 2310 } 2311 #endif 2312 case SCTP_IPV4_ADDRESS: 2313 { 2314 /* ipv4 address param */ 2315 struct sctp_ipv4addr_param *p4, p4_buf; 2316 2317 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2318 return NULL; 2319 } 2320 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2321 offset + sizeof(struct sctp_asconf_chunk), 2322 &p4_buf.ph, sizeof(*p4)); 2323 if (p4 == NULL) { 2324 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2325 __FUNCTION__); 2326 return (NULL); 2327 } 2328 sin = (struct sockaddr_in *)&remote_store; 2329 sin->sin_family = AF_INET; 2330 sin->sin_len = sizeof(*sin); 2331 sin->sin_port = sh->src_port; 2332 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2333 if (sin->sin_addr.s_addr == INADDR_ANY) 2334 zero_address = 1; 2335 break; 2336 } 2337 default: 2338 /* invalid address param type */ 2339 return NULL; 2340 } 2341 2342 if (zero_address) { 2343 stcb = sctp_findassoc_by_vtag(NULL, to, ntohl(sh->v_tag), inp_p, 2344 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2345 /* 2346 * printf("findassociation_ep_asconf: zero lookup address 2347 * finds stcb 0x%x\n", (uint32_t)stcb); 2348 */ 2349 } else { 2350 stcb = sctp_findassociation_ep_addr(inp_p, 2351 (struct sockaddr *)&remote_store, netp, 2352 to, NULL); 2353 } 2354 return (stcb); 2355 } 2356 2357 2358 /* 2359 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2360 * addresses. This way if we don't get a bind we by default pick a ephemeral 2361 * port with all addresses bound. 2362 */ 2363 int 2364 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2365 { 2366 /* 2367 * we get called when a new endpoint starts up. We need to allocate 2368 * the sctp_inpcb structure from the zone and init it. Mark it as 2369 * unbound and find a port that we can use as an ephemeral with 2370 * INADDR_ANY. If the user binds later no problem we can then add in 2371 * the specific addresses. And setup the default parameters for the 2372 * EP. 2373 */ 2374 int i, error; 2375 struct sctp_inpcb *inp; 2376 struct sctp_pcb *m; 2377 struct timeval time; 2378 sctp_sharedkey_t *null_key; 2379 2380 error = 0; 2381 2382 SCTP_INP_INFO_WLOCK(); 2383 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2384 if (inp == NULL) { 2385 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2386 SCTP_INP_INFO_WUNLOCK(); 2387 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2388 return (ENOBUFS); 2389 } 2390 /* zap it */ 2391 bzero(inp, sizeof(*inp)); 2392 2393 /* bump generations */ 2394 /* setup socket pointers */ 2395 inp->sctp_socket = so; 2396 inp->ip_inp.inp.inp_socket = so; 2397 inp->sctp_associd_counter = 1; 2398 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2399 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2400 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2401 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2402 /* init the small hash table we use to track asocid <-> tcb */ 2403 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2404 if (inp->sctp_asocidhash == NULL) { 2405 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2406 SCTP_INP_INFO_WUNLOCK(); 2407 return (ENOBUFS); 2408 } 2409 #ifdef IPSEC 2410 { 2411 struct inpcbpolicy *pcb_sp = NULL; 2412 2413 error = ipsec_init_policy(so, &pcb_sp); 2414 /* Arrange to share the policy */ 2415 inp->ip_inp.inp.inp_sp = pcb_sp; 2416 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2417 } 2418 if (error != 0) { 2419 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2420 SCTP_INP_INFO_WUNLOCK(); 2421 return error; 2422 } 2423 #endif /* IPSEC */ 2424 SCTP_INCR_EP_COUNT(); 2425 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2426 SCTP_INP_INFO_WUNLOCK(); 2427 2428 so->so_pcb = (caddr_t)inp; 2429 2430 if ((SCTP_SO_TYPE(so) == SOCK_DGRAM) || 2431 (SCTP_SO_TYPE(so) == SOCK_SEQPACKET)) { 2432 /* UDP style socket */ 2433 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2434 SCTP_PCB_FLAGS_UNBOUND); 2435 /* Be sure it is NON-BLOCKING IO for UDP */ 2436 /* SCTP_SET_SO_NBIO(so); */ 2437 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2438 /* TCP style socket */ 2439 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2440 SCTP_PCB_FLAGS_UNBOUND); 2441 /* Be sure we have blocking IO by default */ 2442 SCTP_CLEAR_SO_NBIO(so); 2443 } else { 2444 /* 2445 * unsupported socket type (RAW, etc)- in case we missed it 2446 * in protosw 2447 */ 2448 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2449 so->so_pcb = NULL; 2450 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2451 return (EOPNOTSUPP); 2452 } 2453 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2454 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2455 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2456 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2457 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2458 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2459 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2460 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2461 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2462 } 2463 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2464 &inp->sctp_hashmark); 2465 if (inp->sctp_tcbhash == NULL) { 2466 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2467 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2468 so->so_pcb = NULL; 2469 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2470 return (ENOBUFS); 2471 } 2472 inp->def_vrf_id = vrf_id; 2473 2474 SCTP_INP_INFO_WLOCK(); 2475 SCTP_INP_LOCK_INIT(inp); 2476 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2477 SCTP_INP_READ_INIT(inp); 2478 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2479 /* lock the new ep */ 2480 SCTP_INP_WLOCK(inp); 2481 2482 /* add it to the info area */ 2483 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2484 SCTP_INP_INFO_WUNLOCK(); 2485 2486 TAILQ_INIT(&inp->read_queue); 2487 LIST_INIT(&inp->sctp_addr_list); 2488 2489 LIST_INIT(&inp->sctp_asoc_list); 2490 2491 #ifdef SCTP_TRACK_FREED_ASOCS 2492 /* TEMP CODE */ 2493 LIST_INIT(&inp->sctp_asoc_free_list); 2494 #endif 2495 /* Init the timer structure for signature change */ 2496 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2497 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2498 2499 /* now init the actual endpoint default data */ 2500 m = &inp->sctp_ep; 2501 2502 /* setup the base timeout information */ 2503 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2504 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2505 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2506 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2507 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2508 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2509 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2510 /* all max/min max are in ms */ 2511 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2512 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2513 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2514 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2515 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2516 2517 m->max_open_streams_intome = MAX_SCTP_STREAMS; 2518 2519 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2520 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2521 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2522 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2523 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2524 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2525 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2526 2527 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2528 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2529 /* number of streams to pre-open on a association */ 2530 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2531 2532 /* Add adaptation cookie */ 2533 m->adaptation_layer_indicator = 0x504C5253; 2534 2535 /* seed random number generator */ 2536 m->random_counter = 1; 2537 m->store_at = SCTP_SIGNATURE_SIZE; 2538 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2539 sctp_fill_random_store(m); 2540 2541 /* Minimum cookie size */ 2542 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2543 sizeof(struct sctp_state_cookie); 2544 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2545 2546 /* Setup the initial secret */ 2547 (void)SCTP_GETTIME_TIMEVAL(&time); 2548 m->time_of_secret_change = time.tv_sec; 2549 2550 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2551 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2552 } 2553 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2554 2555 /* How long is a cookie good for ? */ 2556 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2557 /* 2558 * Initialize authentication parameters 2559 */ 2560 m->local_hmacs = sctp_default_supported_hmaclist(); 2561 m->local_auth_chunks = sctp_alloc_chunklist(); 2562 sctp_auth_set_default_chunks(m->local_auth_chunks); 2563 LIST_INIT(&m->shared_keys); 2564 /* add default NULL key as key id 0 */ 2565 null_key = sctp_alloc_sharedkey(); 2566 sctp_insert_sharedkey(&m->shared_keys, null_key); 2567 SCTP_INP_WUNLOCK(inp); 2568 #ifdef SCTP_LOG_CLOSING 2569 sctp_log_closing(inp, NULL, 12); 2570 #endif 2571 return (error); 2572 } 2573 2574 2575 void 2576 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2577 struct sctp_tcb *stcb) 2578 { 2579 struct sctp_nets *net; 2580 uint16_t lport, rport; 2581 struct sctppcbhead *head; 2582 struct sctp_laddr *laddr, *oladdr; 2583 2584 atomic_add_int(&stcb->asoc.refcnt, 1); 2585 SCTP_TCB_UNLOCK(stcb); 2586 SCTP_INP_INFO_WLOCK(); 2587 SCTP_INP_WLOCK(old_inp); 2588 SCTP_INP_WLOCK(new_inp); 2589 SCTP_TCB_LOCK(stcb); 2590 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2591 2592 new_inp->sctp_ep.time_of_secret_change = 2593 old_inp->sctp_ep.time_of_secret_change; 2594 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2595 sizeof(old_inp->sctp_ep.secret_key)); 2596 new_inp->sctp_ep.current_secret_number = 2597 old_inp->sctp_ep.current_secret_number; 2598 new_inp->sctp_ep.last_secret_number = 2599 old_inp->sctp_ep.last_secret_number; 2600 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2601 2602 /* make it so new data pours into the new socket */ 2603 stcb->sctp_socket = new_inp->sctp_socket; 2604 stcb->sctp_ep = new_inp; 2605 2606 /* Copy the port across */ 2607 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2608 rport = stcb->rport; 2609 /* Pull the tcb from the old association */ 2610 LIST_REMOVE(stcb, sctp_tcbhash); 2611 LIST_REMOVE(stcb, sctp_tcblist); 2612 if (stcb->asoc.in_asocid_hash) { 2613 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2614 } 2615 /* Now insert the new_inp into the TCP connected hash */ 2616 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2617 2618 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2619 /* Its safe to access */ 2620 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2621 2622 /* Now move the tcb into the endpoint list */ 2623 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2624 /* 2625 * Question, do we even need to worry about the ep-hash since we 2626 * only have one connection? Probably not :> so lets get rid of it 2627 * and not suck up any kernel memory in that. 2628 */ 2629 if (stcb->asoc.in_asocid_hash) { 2630 struct sctpasochead *lhd; 2631 2632 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2633 new_inp->hashasocidmark)]; 2634 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2635 } 2636 /* Ok. Let's restart timer. */ 2637 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2638 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2639 stcb, net); 2640 } 2641 2642 SCTP_INP_INFO_WUNLOCK(); 2643 if (new_inp->sctp_tcbhash != NULL) { 2644 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2645 new_inp->sctp_tcbhash = NULL; 2646 } 2647 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2648 /* Subset bound, so copy in the laddr list from the old_inp */ 2649 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2650 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2651 if (laddr == NULL) { 2652 /* 2653 * Gak, what can we do? This assoc is really 2654 * HOSED. We probably should send an abort 2655 * here. 2656 */ 2657 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2658 continue; 2659 } 2660 SCTP_INCR_LADDR_COUNT(); 2661 bzero(laddr, sizeof(*laddr)); 2662 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2663 laddr->ifa = oladdr->ifa; 2664 atomic_add_int(&laddr->ifa->refcount, 1); 2665 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2666 sctp_nxt_addr); 2667 new_inp->laddr_count++; 2668 } 2669 } 2670 /* 2671 * Now any running timers need to be adjusted since we really don't 2672 * care if they are running or not just blast in the new_inp into 2673 * all of them. 2674 */ 2675 2676 stcb->asoc.hb_timer.ep = (void *)new_inp; 2677 stcb->asoc.dack_timer.ep = (void *)new_inp; 2678 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2679 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2680 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2681 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2682 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2683 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2684 /* now what about the nets? */ 2685 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2686 net->pmtu_timer.ep = (void *)new_inp; 2687 net->rxt_timer.ep = (void *)new_inp; 2688 net->fr_timer.ep = (void *)new_inp; 2689 } 2690 SCTP_INP_WUNLOCK(new_inp); 2691 SCTP_INP_WUNLOCK(old_inp); 2692 } 2693 2694 2695 2696 2697 /* sctp_ifap is used to bypass normal local address validation checks */ 2698 int 2699 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2700 struct sctp_ifa *sctp_ifap, struct thread *p) 2701 { 2702 /* bind a ep to a socket address */ 2703 struct sctppcbhead *head; 2704 struct sctp_inpcb *inp, *inp_tmp; 2705 struct inpcb *ip_inp; 2706 int port_reuse_active = 0; 2707 int bindall; 2708 uint16_t lport; 2709 int error; 2710 uint32_t vrf_id; 2711 2712 lport = 0; 2713 error = 0; 2714 bindall = 1; 2715 inp = (struct sctp_inpcb *)so->so_pcb; 2716 ip_inp = (struct inpcb *)so->so_pcb; 2717 #ifdef SCTP_DEBUG 2718 if (addr) { 2719 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port:%d\n", 2720 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2721 SCTPDBG(SCTP_DEBUG_PCB1, "Addr :"); 2722 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2723 } 2724 #endif 2725 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2726 /* already did a bind, subsequent binds NOT allowed ! */ 2727 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2728 return (EINVAL); 2729 } 2730 #ifdef INVARIANTS 2731 if (p == NULL) 2732 panic("null proc/thread"); 2733 #endif 2734 if (addr != NULL) { 2735 switch (addr->sa_family) { 2736 case AF_INET: 2737 { 2738 struct sockaddr_in *sin; 2739 2740 /* IPV6_V6ONLY socket? */ 2741 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2742 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2743 return (EINVAL); 2744 } 2745 if (addr->sa_len != sizeof(*sin)) { 2746 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2747 return (EINVAL); 2748 } 2749 sin = (struct sockaddr_in *)addr; 2750 lport = sin->sin_port; 2751 /* 2752 * For LOOPBACK the prison_local_ip4() call 2753 * will transmute the ip address to the 2754 * proper value. 2755 */ 2756 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2757 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2758 return (error); 2759 } 2760 if (sin->sin_addr.s_addr != INADDR_ANY) { 2761 bindall = 0; 2762 } 2763 break; 2764 } 2765 #ifdef INET6 2766 case AF_INET6: 2767 { 2768 /* 2769 * Only for pure IPv6 Address. (No IPv4 2770 * Mapped!) 2771 */ 2772 struct sockaddr_in6 *sin6; 2773 2774 sin6 = (struct sockaddr_in6 *)addr; 2775 2776 if (addr->sa_len != sizeof(*sin6)) { 2777 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2778 return (EINVAL); 2779 } 2780 lport = sin6->sin6_port; 2781 2782 /* 2783 * For LOOPBACK the prison_local_ip6() call 2784 * will transmute the ipv6 address to the 2785 * proper value. 2786 */ 2787 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2788 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2789 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2790 return (error); 2791 } 2792 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2793 bindall = 0; 2794 /* KAME hack: embed scopeid */ 2795 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2796 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2797 return (EINVAL); 2798 } 2799 } 2800 /* this must be cleared for ifa_ifwithaddr() */ 2801 sin6->sin6_scope_id = 0; 2802 break; 2803 } 2804 #endif 2805 default: 2806 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2807 return (EAFNOSUPPORT); 2808 } 2809 } 2810 SCTP_INP_INFO_WLOCK(); 2811 SCTP_INP_WLOCK(inp); 2812 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2813 vrf_id = inp->def_vrf_id; 2814 2815 /* increase our count due to the unlock we do */ 2816 SCTP_INP_INCR_REF(inp); 2817 if (lport) { 2818 /* 2819 * Did the caller specify a port? if so we must see if a ep 2820 * already has this one bound. 2821 */ 2822 /* got to be root to get at low ports */ 2823 if (ntohs(lport) < IPPORT_RESERVED) { 2824 if (p && (error = 2825 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2826 )) { 2827 SCTP_INP_DECR_REF(inp); 2828 SCTP_INP_WUNLOCK(inp); 2829 SCTP_INP_INFO_WUNLOCK(); 2830 return (error); 2831 } 2832 } 2833 if (p == NULL) { 2834 SCTP_INP_DECR_REF(inp); 2835 SCTP_INP_WUNLOCK(inp); 2836 SCTP_INP_INFO_WUNLOCK(); 2837 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2838 return (error); 2839 } 2840 SCTP_INP_WUNLOCK(inp); 2841 if (bindall) { 2842 vrf_id = inp->def_vrf_id; 2843 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2844 if (inp_tmp != NULL) { 2845 /* 2846 * lock guy returned and lower count note 2847 * that we are not bound so inp_tmp should 2848 * NEVER be inp. And it is this inp 2849 * (inp_tmp) that gets the reference bump, 2850 * so we must lower it. 2851 */ 2852 SCTP_INP_DECR_REF(inp_tmp); 2853 /* unlock info */ 2854 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2855 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2856 /* 2857 * Ok, must be one-2-one and 2858 * allowing port re-use 2859 */ 2860 port_reuse_active = 1; 2861 goto continue_anyway; 2862 } 2863 SCTP_INP_DECR_REF(inp); 2864 SCTP_INP_INFO_WUNLOCK(); 2865 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2866 return (EADDRINUSE); 2867 } 2868 } else { 2869 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2870 if (inp_tmp != NULL) { 2871 /* 2872 * lock guy returned and lower count note 2873 * that we are not bound so inp_tmp should 2874 * NEVER be inp. And it is this inp 2875 * (inp_tmp) that gets the reference bump, 2876 * so we must lower it. 2877 */ 2878 SCTP_INP_DECR_REF(inp_tmp); 2879 /* unlock info */ 2880 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2881 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2882 /* 2883 * Ok, must be one-2-one and 2884 * allowing port re-use 2885 */ 2886 port_reuse_active = 1; 2887 goto continue_anyway; 2888 } 2889 SCTP_INP_DECR_REF(inp); 2890 SCTP_INP_INFO_WUNLOCK(); 2891 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2892 return (EADDRINUSE); 2893 } 2894 } 2895 continue_anyway: 2896 SCTP_INP_WLOCK(inp); 2897 if (bindall) { 2898 /* verify that no lport is not used by a singleton */ 2899 if ((port_reuse_active == 0) && 2900 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id)) 2901 ) { 2902 /* Sorry someone already has this one bound */ 2903 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2904 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2905 port_reuse_active = 1; 2906 } else { 2907 SCTP_INP_DECR_REF(inp); 2908 SCTP_INP_WUNLOCK(inp); 2909 SCTP_INP_INFO_WUNLOCK(); 2910 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2911 return (EADDRINUSE); 2912 } 2913 } 2914 } 2915 } else { 2916 uint16_t first, last, candidate; 2917 uint16_t count; 2918 int done; 2919 2920 if (ip_inp->inp_flags & INP_HIGHPORT) { 2921 first = MODULE_GLOBAL(ipport_hifirstauto); 2922 last = MODULE_GLOBAL(ipport_hilastauto); 2923 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2924 if (p && (error = 2925 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2926 )) { 2927 SCTP_INP_DECR_REF(inp); 2928 SCTP_INP_WUNLOCK(inp); 2929 SCTP_INP_INFO_WUNLOCK(); 2930 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2931 return (error); 2932 } 2933 first = MODULE_GLOBAL(ipport_lowfirstauto); 2934 last = MODULE_GLOBAL(ipport_lowlastauto); 2935 } else { 2936 first = MODULE_GLOBAL(ipport_firstauto); 2937 last = MODULE_GLOBAL(ipport_lastauto); 2938 } 2939 if (first > last) { 2940 uint16_t temp; 2941 2942 temp = first; 2943 first = last; 2944 last = temp; 2945 } 2946 count = last - first + 1; /* number of candidates */ 2947 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2948 2949 done = 0; 2950 while (!done) { 2951 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2952 done = 1; 2953 } 2954 if (!done) { 2955 if (--count == 0) { 2956 SCTP_INP_DECR_REF(inp); 2957 SCTP_INP_WUNLOCK(inp); 2958 SCTP_INP_INFO_WUNLOCK(); 2959 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2960 return (EADDRINUSE); 2961 } 2962 if (candidate == last) 2963 candidate = first; 2964 else 2965 candidate = candidate + 1; 2966 } 2967 } 2968 lport = htons(candidate); 2969 } 2970 SCTP_INP_DECR_REF(inp); 2971 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2972 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2973 /* 2974 * this really should not happen. The guy did a non-blocking 2975 * bind and then did a close at the same time. 2976 */ 2977 SCTP_INP_WUNLOCK(inp); 2978 SCTP_INP_INFO_WUNLOCK(); 2979 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2980 return (EINVAL); 2981 } 2982 /* ok we look clear to give out this port, so lets setup the binding */ 2983 if (bindall) { 2984 /* binding to all addresses, so just set in the proper flags */ 2985 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 2986 /* set the automatic addr changes from kernel flag */ 2987 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 2988 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2989 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2990 } else { 2991 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 2992 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 2993 } 2994 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 2995 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2996 } else { 2997 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 2998 } 2999 /* 3000 * set the automatic mobility_base from kernel flag (by 3001 * micchie) 3002 */ 3003 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3004 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3005 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3006 } else { 3007 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3008 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3009 } 3010 /* 3011 * set the automatic mobility_fasthandoff from kernel flag 3012 * (by micchie) 3013 */ 3014 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3015 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3016 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3017 } else { 3018 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3019 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3020 } 3021 } else { 3022 /* 3023 * bind specific, make sure flags is off and add a new 3024 * address structure to the sctp_addr_list inside the ep 3025 * structure. 3026 * 3027 * We will need to allocate one and insert it at the head. The 3028 * socketopt call can just insert new addresses in there as 3029 * well. It will also have to do the embed scope kame hack 3030 * too (before adding). 3031 */ 3032 struct sctp_ifa *ifa; 3033 struct sockaddr_storage store_sa; 3034 3035 memset(&store_sa, 0, sizeof(store_sa)); 3036 if (addr->sa_family == AF_INET) { 3037 struct sockaddr_in *sin; 3038 3039 sin = (struct sockaddr_in *)&store_sa; 3040 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3041 sin->sin_port = 0; 3042 } else if (addr->sa_family == AF_INET6) { 3043 struct sockaddr_in6 *sin6; 3044 3045 sin6 = (struct sockaddr_in6 *)&store_sa; 3046 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3047 sin6->sin6_port = 0; 3048 } 3049 /* 3050 * first find the interface with the bound address need to 3051 * zero out the port to find the address! yuck! can't do 3052 * this earlier since need port for sctp_pcb_findep() 3053 */ 3054 if (sctp_ifap != NULL) 3055 ifa = sctp_ifap; 3056 else { 3057 /* 3058 * Note for BSD we hit here always other O/S's will 3059 * pass things in via the sctp_ifap argument 3060 * (Panda). 3061 */ 3062 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3063 vrf_id, SCTP_ADDR_NOT_LOCKED); 3064 } 3065 if (ifa == NULL) { 3066 /* Can't find an interface with that address */ 3067 SCTP_INP_WUNLOCK(inp); 3068 SCTP_INP_INFO_WUNLOCK(); 3069 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3070 return (EADDRNOTAVAIL); 3071 } 3072 if (addr->sa_family == AF_INET6) { 3073 /* GAK, more FIXME IFA lock? */ 3074 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3075 /* Can't bind a non-existent addr. */ 3076 SCTP_INP_WUNLOCK(inp); 3077 SCTP_INP_INFO_WUNLOCK(); 3078 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3079 return (EINVAL); 3080 } 3081 } 3082 /* we're not bound all */ 3083 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3084 /* allow bindx() to send ASCONF's for binding changes */ 3085 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3086 /* clear automatic addr changes from kernel flag */ 3087 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3088 3089 /* add this address to the endpoint list */ 3090 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3091 if (error != 0) { 3092 SCTP_INP_WUNLOCK(inp); 3093 SCTP_INP_INFO_WUNLOCK(); 3094 return (error); 3095 } 3096 inp->laddr_count++; 3097 } 3098 /* find the bucket */ 3099 if (port_reuse_active) { 3100 /* Put it into tcp 1-2-1 hash */ 3101 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3102 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3103 } else { 3104 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3105 } 3106 /* put it in the bucket */ 3107 LIST_INSERT_HEAD(head, inp, sctp_hash); 3108 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3109 head, ntohs(lport), port_reuse_active); 3110 /* set in the port */ 3111 inp->sctp_lport = lport; 3112 3113 /* turn off just the unbound flag */ 3114 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3115 SCTP_INP_WUNLOCK(inp); 3116 SCTP_INP_INFO_WUNLOCK(); 3117 return (0); 3118 } 3119 3120 3121 static void 3122 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3123 { 3124 struct sctp_iterator *it, *nit; 3125 3126 /* 3127 * We enter with the only the ITERATOR_LOCK in place and a write 3128 * lock on the inp_info stuff. 3129 */ 3130 it = sctp_it_ctl.cur_it; 3131 if (it && (it->vn != curvnet)) { 3132 /* Its not looking at our VNET */ 3133 return; 3134 } 3135 if (it && (it->inp == inp)) { 3136 /* 3137 * This is tricky and we hold the iterator lock, but when it 3138 * returns and gets the lock (when we release it) the 3139 * iterator will try to operate on inp. We need to stop that 3140 * from happening. But of course the iterator has a 3141 * reference on the stcb and inp. We can mark it and it will 3142 * stop. 3143 * 3144 * If its a single iterator situation, we set the end iterator 3145 * flag. Otherwise we set the iterator to go to the next 3146 * inp. 3147 * 3148 */ 3149 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3150 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3151 } else { 3152 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3153 } 3154 } 3155 /* 3156 * Now go through and remove any single reference to our inp that 3157 * may be still pending on the list 3158 */ 3159 SCTP_IPI_ITERATOR_WQ_LOCK(); 3160 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3161 if (it->vn != curvnet) { 3162 continue; 3163 } 3164 if (it->inp == inp) { 3165 /* This one points to me is it inp specific? */ 3166 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3167 /* Remove and free this one */ 3168 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3169 it, sctp_nxt_itr); 3170 if (it->function_atend != NULL) { 3171 (*it->function_atend) (it->pointer, it->val); 3172 } 3173 SCTP_FREE(it, SCTP_M_ITER); 3174 } else { 3175 it->inp = LIST_NEXT(it->inp, sctp_list); 3176 if (it->inp) { 3177 SCTP_INP_INCR_REF(it->inp); 3178 } 3179 } 3180 /* 3181 * When its put in the refcnt is incremented so decr 3182 * it 3183 */ 3184 SCTP_INP_DECR_REF(inp); 3185 } 3186 } 3187 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3188 } 3189 3190 /* release sctp_inpcb unbind the port */ 3191 void 3192 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3193 { 3194 /* 3195 * Here we free a endpoint. We must find it (if it is in the Hash 3196 * table) and remove it from there. Then we must also find it in the 3197 * overall list and remove it from there. After all removals are 3198 * complete then any timer has to be stopped. Then start the actual 3199 * freeing. a) Any local lists. b) Any associations. c) The hash of 3200 * all associations. d) finally the ep itself. 3201 */ 3202 struct sctp_pcb *m; 3203 struct sctp_tcb *asoc, *nasoc; 3204 struct sctp_laddr *laddr, *nladdr; 3205 struct inpcb *ip_pcb; 3206 struct socket *so; 3207 int being_refed = 0; 3208 struct sctp_queued_to_read *sq, *nsq; 3209 int cnt; 3210 sctp_sharedkey_t *shared_key, *nshared_key; 3211 3212 3213 #ifdef SCTP_LOG_CLOSING 3214 sctp_log_closing(inp, NULL, 0); 3215 #endif 3216 SCTP_ITERATOR_LOCK(); 3217 /* mark any iterators on the list or being processed */ 3218 sctp_iterator_inp_being_freed(inp); 3219 SCTP_ITERATOR_UNLOCK(); 3220 so = inp->sctp_socket; 3221 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3222 /* been here before.. eeks.. get out of here */ 3223 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3224 #ifdef SCTP_LOG_CLOSING 3225 sctp_log_closing(inp, NULL, 1); 3226 #endif 3227 return; 3228 } 3229 SCTP_ASOC_CREATE_LOCK(inp); 3230 SCTP_INP_INFO_WLOCK(); 3231 3232 SCTP_INP_WLOCK(inp); 3233 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3234 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3235 /* socket is gone, so no more wakeups allowed */ 3236 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3237 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3238 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3239 3240 } 3241 /* First time through we have the socket lock, after that no more. */ 3242 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3243 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3244 3245 if (inp->control) { 3246 sctp_m_freem(inp->control); 3247 inp->control = NULL; 3248 } 3249 if (inp->pkt) { 3250 sctp_m_freem(inp->pkt); 3251 inp->pkt = NULL; 3252 } 3253 m = &inp->sctp_ep; 3254 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3255 * here but I will be nice :> (i.e. 3256 * ip_pcb = ep;) */ 3257 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3258 int cnt_in_sd; 3259 3260 cnt_in_sd = 0; 3261 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3262 SCTP_TCB_LOCK(asoc); 3263 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3264 /* Skip guys being freed */ 3265 cnt_in_sd++; 3266 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3267 /* 3268 * Special case - we did not start a 3269 * kill timer on the asoc due to it 3270 * was not closed. So go ahead and 3271 * start it now. 3272 */ 3273 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3274 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3275 } 3276 SCTP_TCB_UNLOCK(asoc); 3277 continue; 3278 } 3279 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3280 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3281 (asoc->asoc.total_output_queue_size == 0)) { 3282 /* 3283 * If we have data in queue, we don't want 3284 * to just free since the app may have done, 3285 * send()/close or connect/send/close. And 3286 * it wants the data to get across first. 3287 */ 3288 /* Just abandon things in the front states */ 3289 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3290 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3291 cnt_in_sd++; 3292 } 3293 continue; 3294 } 3295 /* Disconnect the socket please */ 3296 asoc->sctp_socket = NULL; 3297 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3298 if ((asoc->asoc.size_on_reasm_queue > 0) || 3299 (asoc->asoc.control_pdapi) || 3300 (asoc->asoc.size_on_all_streams > 0) || 3301 (so && (so->so_rcv.sb_cc > 0)) 3302 ) { 3303 /* Left with Data unread */ 3304 struct mbuf *op_err; 3305 3306 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3307 0, M_DONTWAIT, 1, MT_DATA); 3308 if (op_err) { 3309 /* Fill in the user initiated abort */ 3310 struct sctp_paramhdr *ph; 3311 uint32_t *ippp; 3312 3313 SCTP_BUF_LEN(op_err) = 3314 sizeof(struct sctp_paramhdr) + sizeof(uint32_t); 3315 ph = mtod(op_err, 3316 struct sctp_paramhdr *); 3317 ph->param_type = htons( 3318 SCTP_CAUSE_USER_INITIATED_ABT); 3319 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3320 ippp = (uint32_t *) (ph + 1); 3321 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_3); 3322 } 3323 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3324 #if defined(SCTP_PANIC_ON_ABORT) 3325 panic("inpcb_free does an abort"); 3326 #endif 3327 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3328 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3329 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3330 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3331 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3332 } 3333 if (sctp_free_assoc(inp, asoc, 3334 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3335 cnt_in_sd++; 3336 } 3337 continue; 3338 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3339 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3340 (asoc->asoc.stream_queue_cnt == 0) 3341 ) { 3342 if (asoc->asoc.locked_on_sending) { 3343 goto abort_anyway; 3344 } 3345 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3346 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3347 /* 3348 * there is nothing queued to send, 3349 * so I send shutdown 3350 */ 3351 sctp_send_shutdown(asoc, asoc->asoc.primary_destination); 3352 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3353 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3354 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3355 } 3356 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3357 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3358 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3359 asoc->asoc.primary_destination); 3360 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3361 asoc->asoc.primary_destination); 3362 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3363 } 3364 } else { 3365 /* mark into shutdown pending */ 3366 struct sctp_stream_queue_pending *sp; 3367 3368 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3369 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3370 asoc->asoc.primary_destination); 3371 if (asoc->asoc.locked_on_sending) { 3372 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3373 sctp_streamhead); 3374 if (sp == NULL) { 3375 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3376 asoc->asoc.locked_on_sending, 3377 asoc->asoc.locked_on_sending->stream_no); 3378 } else { 3379 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3380 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3381 } 3382 } 3383 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3384 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3385 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3386 struct mbuf *op_err; 3387 3388 abort_anyway: 3389 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3390 0, M_DONTWAIT, 1, MT_DATA); 3391 if (op_err) { 3392 /* 3393 * Fill in the user 3394 * initiated abort 3395 */ 3396 struct sctp_paramhdr *ph; 3397 uint32_t *ippp; 3398 3399 SCTP_BUF_LEN(op_err) = 3400 (sizeof(struct sctp_paramhdr) + 3401 sizeof(uint32_t)); 3402 ph = mtod(op_err, 3403 struct sctp_paramhdr *); 3404 ph->param_type = htons( 3405 SCTP_CAUSE_USER_INITIATED_ABT); 3406 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3407 ippp = (uint32_t *) (ph + 1); 3408 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_5); 3409 } 3410 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3411 #if defined(SCTP_PANIC_ON_ABORT) 3412 panic("inpcb_free does an abort"); 3413 #endif 3414 3415 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3416 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3417 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3418 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3419 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3420 } 3421 if (sctp_free_assoc(inp, asoc, 3422 SCTP_PCBFREE_NOFORCE, 3423 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3424 cnt_in_sd++; 3425 } 3426 continue; 3427 } else { 3428 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3429 } 3430 } 3431 cnt_in_sd++; 3432 SCTP_TCB_UNLOCK(asoc); 3433 } 3434 /* now is there some left in our SHUTDOWN state? */ 3435 if (cnt_in_sd) { 3436 #ifdef SCTP_LOG_CLOSING 3437 sctp_log_closing(inp, NULL, 2); 3438 #endif 3439 inp->sctp_socket = NULL; 3440 SCTP_INP_WUNLOCK(inp); 3441 SCTP_ASOC_CREATE_UNLOCK(inp); 3442 SCTP_INP_INFO_WUNLOCK(); 3443 return; 3444 } 3445 } 3446 inp->sctp_socket = NULL; 3447 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3448 SCTP_PCB_FLAGS_UNBOUND) { 3449 /* 3450 * ok, this guy has been bound. It's port is somewhere in 3451 * the SCTP_BASE_INFO(hash table). Remove it! 3452 */ 3453 LIST_REMOVE(inp, sctp_hash); 3454 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3455 } 3456 /* 3457 * If there is a timer running to kill us, forget it, since it may 3458 * have a contest on the INP lock.. which would cause us to die ... 3459 */ 3460 cnt = 0; 3461 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3462 SCTP_TCB_LOCK(asoc); 3463 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3464 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3465 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3466 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3467 } 3468 cnt++; 3469 SCTP_TCB_UNLOCK(asoc); 3470 continue; 3471 } 3472 /* Free associations that are NOT killing us */ 3473 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3474 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3475 struct mbuf *op_err; 3476 uint32_t *ippp; 3477 3478 op_err = sctp_get_mbuf_for_msg((sizeof(struct sctp_paramhdr) + sizeof(uint32_t)), 3479 0, M_DONTWAIT, 1, MT_DATA); 3480 if (op_err) { 3481 /* Fill in the user initiated abort */ 3482 struct sctp_paramhdr *ph; 3483 3484 SCTP_BUF_LEN(op_err) = (sizeof(struct sctp_paramhdr) + 3485 sizeof(uint32_t)); 3486 ph = mtod(op_err, struct sctp_paramhdr *); 3487 ph->param_type = htons( 3488 SCTP_CAUSE_USER_INITIATED_ABT); 3489 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3490 ippp = (uint32_t *) (ph + 1); 3491 *ippp = htonl(SCTP_FROM_SCTP_PCB + SCTP_LOC_7); 3492 3493 } 3494 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3495 #if defined(SCTP_PANIC_ON_ABORT) 3496 panic("inpcb_free does an abort"); 3497 #endif 3498 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3499 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3500 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3501 cnt++; 3502 SCTP_TCB_UNLOCK(asoc); 3503 continue; 3504 } 3505 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3506 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3507 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3508 } 3509 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3510 cnt++; 3511 } 3512 } 3513 if (cnt) { 3514 /* Ok we have someone out there that will kill us */ 3515 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3516 #ifdef SCTP_LOG_CLOSING 3517 sctp_log_closing(inp, NULL, 3); 3518 #endif 3519 SCTP_INP_WUNLOCK(inp); 3520 SCTP_ASOC_CREATE_UNLOCK(inp); 3521 SCTP_INP_INFO_WUNLOCK(); 3522 return; 3523 } 3524 if (SCTP_INP_LOCK_CONTENDED(inp)) 3525 being_refed++; 3526 if (SCTP_INP_READ_CONTENDED(inp)) 3527 being_refed++; 3528 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3529 being_refed++; 3530 3531 if ((inp->refcount) || 3532 (being_refed) || 3533 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3534 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3535 #ifdef SCTP_LOG_CLOSING 3536 sctp_log_closing(inp, NULL, 4); 3537 #endif 3538 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3539 SCTP_INP_WUNLOCK(inp); 3540 SCTP_ASOC_CREATE_UNLOCK(inp); 3541 SCTP_INP_INFO_WUNLOCK(); 3542 return; 3543 } 3544 inp->sctp_ep.signature_change.type = 0; 3545 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3546 /* 3547 * Remove it from the list .. last thing we need a lock for. 3548 */ 3549 LIST_REMOVE(inp, sctp_list); 3550 SCTP_INP_WUNLOCK(inp); 3551 SCTP_ASOC_CREATE_UNLOCK(inp); 3552 SCTP_INP_INFO_WUNLOCK(); 3553 /* 3554 * Now we release all locks. Since this INP cannot be found anymore 3555 * except possibly by the kill timer that might be running. We call 3556 * the drain function here. It should hit the case were it sees the 3557 * ACTIVE flag cleared and exit out freeing us to proceed and 3558 * destroy everything. 3559 */ 3560 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3561 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3562 } else { 3563 /* Probably un-needed */ 3564 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3565 } 3566 3567 #ifdef SCTP_LOG_CLOSING 3568 sctp_log_closing(inp, NULL, 5); 3569 #endif 3570 3571 3572 if ((inp->sctp_asocidhash) != NULL) { 3573 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3574 inp->sctp_asocidhash = NULL; 3575 } 3576 /* sa_ignore FREED_MEMORY */ 3577 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3578 /* Its only abandoned if it had data left */ 3579 if (sq->length) 3580 SCTP_STAT_INCR(sctps_left_abandon); 3581 3582 TAILQ_REMOVE(&inp->read_queue, sq, next); 3583 sctp_free_remote_addr(sq->whoFrom); 3584 if (so) 3585 so->so_rcv.sb_cc -= sq->length; 3586 if (sq->data) { 3587 sctp_m_freem(sq->data); 3588 sq->data = NULL; 3589 } 3590 /* 3591 * no need to free the net count, since at this point all 3592 * assoc's are gone. 3593 */ 3594 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3595 SCTP_DECR_READQ_COUNT(); 3596 } 3597 /* Now the sctp_pcb things */ 3598 /* 3599 * free each asoc if it is not already closed/free. we can't use the 3600 * macro here since le_next will get freed as part of the 3601 * sctp_free_assoc() call. 3602 */ 3603 cnt = 0; 3604 if (so) { 3605 #ifdef IPSEC 3606 ipsec_delete_pcbpolicy(ip_pcb); 3607 #endif /* IPSEC */ 3608 3609 /* Unlocks not needed since the socket is gone now */ 3610 } 3611 if (ip_pcb->inp_options) { 3612 (void)sctp_m_free(ip_pcb->inp_options); 3613 ip_pcb->inp_options = 0; 3614 } 3615 if (ip_pcb->inp_moptions) { 3616 inp_freemoptions(ip_pcb->inp_moptions); 3617 ip_pcb->inp_moptions = 0; 3618 } 3619 #ifdef INET6 3620 if (ip_pcb->inp_vflag & INP_IPV6) { 3621 struct in6pcb *in6p; 3622 3623 in6p = (struct in6pcb *)inp; 3624 ip6_freepcbopts(in6p->in6p_outputopts); 3625 } 3626 #endif /* INET6 */ 3627 ip_pcb->inp_vflag = 0; 3628 /* free up authentication fields */ 3629 if (inp->sctp_ep.local_auth_chunks != NULL) 3630 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3631 if (inp->sctp_ep.local_hmacs != NULL) 3632 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3633 3634 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3635 LIST_REMOVE(shared_key, next); 3636 sctp_free_sharedkey(shared_key); 3637 /* sa_ignore FREED_MEMORY */ 3638 } 3639 3640 /* 3641 * if we have an address list the following will free the list of 3642 * ifaddr's that are set into this ep. Again macro limitations here, 3643 * since the LIST_FOREACH could be a bad idea. 3644 */ 3645 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3646 sctp_remove_laddr(laddr); 3647 } 3648 3649 #ifdef SCTP_TRACK_FREED_ASOCS 3650 /* TEMP CODE */ 3651 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3652 LIST_REMOVE(asoc, sctp_tcblist); 3653 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3654 SCTP_DECR_ASOC_COUNT(); 3655 } 3656 /* *** END TEMP CODE *** */ 3657 #endif 3658 /* Now lets see about freeing the EP hash table. */ 3659 if (inp->sctp_tcbhash != NULL) { 3660 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3661 inp->sctp_tcbhash = NULL; 3662 } 3663 /* Now we must put the ep memory back into the zone pool */ 3664 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3665 SCTP_INP_LOCK_DESTROY(inp); 3666 SCTP_INP_READ_DESTROY(inp); 3667 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3668 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3669 SCTP_DECR_EP_COUNT(); 3670 } 3671 3672 3673 struct sctp_nets * 3674 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3675 { 3676 struct sctp_nets *net; 3677 3678 /* locate the address */ 3679 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3680 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3681 return (net); 3682 } 3683 return (NULL); 3684 } 3685 3686 3687 int 3688 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3689 { 3690 struct sctp_ifa *sctp_ifa; 3691 3692 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3693 if (sctp_ifa) { 3694 return (1); 3695 } else { 3696 return (0); 3697 } 3698 } 3699 3700 /* 3701 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3702 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3703 * stats of stuff. 3704 */ 3705 int 3706 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3707 int set_scope, int from) 3708 { 3709 /* 3710 * The following is redundant to the same lines in the 3711 * sctp_aloc_assoc() but is needed since others call the add address 3712 * function 3713 */ 3714 struct sctp_nets *net, *netfirst; 3715 int addr_inscope; 3716 3717 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3718 from); 3719 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3720 3721 netfirst = sctp_findnet(stcb, newaddr); 3722 if (netfirst) { 3723 /* 3724 * Lie and return ok, we don't want to make the association 3725 * go away for this behavior. It will happen in the TCP 3726 * model in a connected socket. It does not reach the hash 3727 * table until after the association is built so it can't be 3728 * found. Mark as reachable, since the initial creation will 3729 * have been cleared and the NOT_IN_ASSOC flag will have 3730 * been added... and we don't want to end up removing it 3731 * back out. 3732 */ 3733 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3734 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3735 SCTP_ADDR_UNCONFIRMED); 3736 } else { 3737 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3738 } 3739 3740 return (0); 3741 } 3742 addr_inscope = 1; 3743 if (newaddr->sa_family == AF_INET) { 3744 struct sockaddr_in *sin; 3745 3746 sin = (struct sockaddr_in *)newaddr; 3747 if (sin->sin_addr.s_addr == 0) { 3748 /* Invalid address */ 3749 return (-1); 3750 } 3751 /* zero out the bzero area */ 3752 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3753 3754 /* assure len is set */ 3755 sin->sin_len = sizeof(struct sockaddr_in); 3756 if (set_scope) { 3757 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3758 stcb->ipv4_local_scope = 1; 3759 #else 3760 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3761 stcb->asoc.ipv4_local_scope = 1; 3762 } 3763 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3764 } else { 3765 /* Validate the address is in scope */ 3766 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3767 (stcb->asoc.ipv4_local_scope == 0)) { 3768 addr_inscope = 0; 3769 } 3770 } 3771 #ifdef INET6 3772 } else if (newaddr->sa_family == AF_INET6) { 3773 struct sockaddr_in6 *sin6; 3774 3775 sin6 = (struct sockaddr_in6 *)newaddr; 3776 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3777 /* Invalid address */ 3778 return (-1); 3779 } 3780 /* assure len is set */ 3781 sin6->sin6_len = sizeof(struct sockaddr_in6); 3782 if (set_scope) { 3783 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3784 stcb->asoc.loopback_scope = 1; 3785 stcb->asoc.local_scope = 0; 3786 stcb->asoc.ipv4_local_scope = 1; 3787 stcb->asoc.site_scope = 1; 3788 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3789 /* 3790 * If the new destination is a LINK_LOCAL we 3791 * must have common site scope. Don't set 3792 * the local scope since we may not share 3793 * all links, only loopback can do this. 3794 * Links on the local network would also be 3795 * on our private network for v4 too. 3796 */ 3797 stcb->asoc.ipv4_local_scope = 1; 3798 stcb->asoc.site_scope = 1; 3799 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3800 /* 3801 * If the new destination is SITE_LOCAL then 3802 * we must have site scope in common. 3803 */ 3804 stcb->asoc.site_scope = 1; 3805 } 3806 } else { 3807 /* Validate the address is in scope */ 3808 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3809 (stcb->asoc.loopback_scope == 0)) { 3810 addr_inscope = 0; 3811 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3812 (stcb->asoc.local_scope == 0)) { 3813 addr_inscope = 0; 3814 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3815 (stcb->asoc.site_scope == 0)) { 3816 addr_inscope = 0; 3817 } 3818 } 3819 #endif 3820 } else { 3821 /* not supported family type */ 3822 return (-1); 3823 } 3824 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3825 if (net == NULL) { 3826 return (-1); 3827 } 3828 SCTP_INCR_RADDR_COUNT(); 3829 bzero(net, sizeof(*net)); 3830 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3831 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3832 if (newaddr->sa_family == AF_INET) { 3833 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3834 } else if (newaddr->sa_family == AF_INET6) { 3835 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3836 } 3837 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3838 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3839 stcb->asoc.loopback_scope = 1; 3840 stcb->asoc.ipv4_local_scope = 1; 3841 stcb->asoc.local_scope = 0; 3842 stcb->asoc.site_scope = 1; 3843 addr_inscope = 1; 3844 } 3845 net->failure_threshold = stcb->asoc.def_net_failure; 3846 if (addr_inscope == 0) { 3847 net->dest_state = (SCTP_ADDR_REACHABLE | 3848 SCTP_ADDR_OUT_OF_SCOPE); 3849 } else { 3850 if (from == SCTP_ADDR_IS_CONFIRMED) 3851 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3852 net->dest_state = SCTP_ADDR_REACHABLE; 3853 else 3854 net->dest_state = SCTP_ADDR_REACHABLE | 3855 SCTP_ADDR_UNCONFIRMED; 3856 } 3857 /* 3858 * We set this to 0, the timer code knows that this means its an 3859 * initial value 3860 */ 3861 net->rto_needed = 1; 3862 net->RTO = 0; 3863 net->RTO_measured = 0; 3864 stcb->asoc.numnets++; 3865 *(&net->ref_count) = 1; 3866 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3867 net->tos_flowlabel = 0; 3868 if (SCTP_BASE_SYSCTL(sctp_udp_tunneling_for_client_enable)) { 3869 net->port = htons(SCTP_BASE_SYSCTL(sctp_udp_tunneling_port)); 3870 } else { 3871 net->port = 0; 3872 } 3873 #ifdef INET 3874 if (newaddr->sa_family == AF_INET) 3875 net->tos_flowlabel = stcb->asoc.default_tos; 3876 #endif 3877 #ifdef INET6 3878 if (newaddr->sa_family == AF_INET6) 3879 net->tos_flowlabel = stcb->asoc.default_flowlabel; 3880 #endif 3881 /* Init the timer structure */ 3882 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3883 SCTP_OS_TIMER_INIT(&net->fr_timer.timer); 3884 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3885 3886 /* Now generate a route for this guy */ 3887 #ifdef INET6 3888 /* KAME hack: embed scopeid */ 3889 if (newaddr->sa_family == AF_INET6) { 3890 struct sockaddr_in6 *sin6; 3891 3892 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3893 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3894 sin6->sin6_scope_id = 0; 3895 } 3896 #endif 3897 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3898 3899 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3900 /* Get source address */ 3901 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3902 stcb, 3903 (sctp_route_t *) & net->ro, 3904 net, 3905 0, 3906 stcb->asoc.vrf_id); 3907 /* Now get the interface MTU */ 3908 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3909 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3910 } else { 3911 net->mtu = 0; 3912 } 3913 if (net->mtu == 0) { 3914 /* Huh ?? */ 3915 net->mtu = SCTP_DEFAULT_MTU; 3916 } else { 3917 uint32_t rmtu; 3918 3919 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3920 if (rmtu == 0) { 3921 /* 3922 * Start things off to match mtu of 3923 * interface please. 3924 */ 3925 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3926 net->ro.ro_rt, net->mtu); 3927 } else { 3928 /* 3929 * we take the route mtu over the interface, 3930 * since the route may be leading out the 3931 * loopback, or a different interface. 3932 */ 3933 net->mtu = rmtu; 3934 } 3935 } 3936 if (from == SCTP_ALLOC_ASOC) { 3937 stcb->asoc.smallest_mtu = net->mtu; 3938 } 3939 } else { 3940 net->mtu = stcb->asoc.smallest_mtu; 3941 } 3942 #ifdef INET6 3943 if (newaddr->sa_family == AF_INET6) { 3944 struct sockaddr_in6 *sin6; 3945 3946 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3947 (void)sa6_recoverscope(sin6); 3948 } 3949 #endif 3950 if (net->port) { 3951 net->mtu -= sizeof(struct udphdr); 3952 } 3953 if (stcb->asoc.smallest_mtu > net->mtu) { 3954 stcb->asoc.smallest_mtu = net->mtu; 3955 } 3956 /* JRS - Use the congestion control given in the CC module */ 3957 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 3958 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 3959 3960 /* 3961 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3962 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3963 */ 3964 net->find_pseudo_cumack = 1; 3965 net->find_rtx_pseudo_cumack = 1; 3966 net->src_addr_selected = 0; 3967 /* Choose an initial flowid. */ 3968 net->flowid = stcb->asoc.my_vtag ^ 3969 ntohs(stcb->rport) ^ 3970 ntohs(stcb->sctp_ep->sctp_lport); 3971 #ifdef INVARIANTS 3972 net->flowidset = 1; 3973 #endif 3974 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 3975 if (net->ro.ro_rt == NULL) { 3976 /* Since we have no route put it at the back */ 3977 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 3978 } else if (netfirst == NULL) { 3979 /* We are the first one in the pool. */ 3980 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3981 } else if (netfirst->ro.ro_rt == NULL) { 3982 /* 3983 * First one has NO route. Place this one ahead of the first 3984 * one. 3985 */ 3986 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3987 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 3988 /* 3989 * This one has a different interface than the one at the 3990 * top of the list. Place it ahead. 3991 */ 3992 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 3993 } else { 3994 /* 3995 * Ok we have the same interface as the first one. Move 3996 * forward until we find either a) one with a NULL route... 3997 * insert ahead of that b) one with a different ifp.. insert 3998 * after that. c) end of the list.. insert at the tail. 3999 */ 4000 struct sctp_nets *netlook; 4001 4002 do { 4003 netlook = TAILQ_NEXT(netfirst, sctp_next); 4004 if (netlook == NULL) { 4005 /* End of the list */ 4006 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4007 break; 4008 } else if (netlook->ro.ro_rt == NULL) { 4009 /* next one has NO route */ 4010 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4011 break; 4012 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4013 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4014 net, sctp_next); 4015 break; 4016 } 4017 /* Shift forward */ 4018 netfirst = netlook; 4019 } while (netlook != NULL); 4020 } 4021 4022 /* got to have a primary set */ 4023 if (stcb->asoc.primary_destination == 0) { 4024 stcb->asoc.primary_destination = net; 4025 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4026 (net->ro.ro_rt) && 4027 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4028 /* No route to current primary adopt new primary */ 4029 stcb->asoc.primary_destination = net; 4030 } 4031 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, stcb->sctp_ep, stcb, 4032 net); 4033 /* Validate primary is first */ 4034 net = TAILQ_FIRST(&stcb->asoc.nets); 4035 if ((net != stcb->asoc.primary_destination) && 4036 (stcb->asoc.primary_destination)) { 4037 /* 4038 * first one on the list is NOT the primary sctp_cmpaddr() 4039 * is much more efficient if the primary is the first on the 4040 * list, make it so. 4041 */ 4042 TAILQ_REMOVE(&stcb->asoc.nets, 4043 stcb->asoc.primary_destination, sctp_next); 4044 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4045 stcb->asoc.primary_destination, sctp_next); 4046 } 4047 return (0); 4048 } 4049 4050 4051 static uint32_t 4052 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4053 { 4054 uint32_t id; 4055 struct sctpasochead *head; 4056 struct sctp_tcb *lstcb; 4057 4058 SCTP_INP_WLOCK(inp); 4059 try_again: 4060 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4061 /* TSNH */ 4062 SCTP_INP_WUNLOCK(inp); 4063 return (0); 4064 } 4065 /* 4066 * We don't allow assoc id to be 0, this is needed otherwise if the 4067 * id were to wrap we would have issues with some socket options. 4068 */ 4069 if (inp->sctp_associd_counter == 0) { 4070 inp->sctp_associd_counter++; 4071 } 4072 id = inp->sctp_associd_counter; 4073 inp->sctp_associd_counter++; 4074 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4075 if (lstcb) { 4076 goto try_again; 4077 } 4078 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4079 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4080 stcb->asoc.in_asocid_hash = 1; 4081 SCTP_INP_WUNLOCK(inp); 4082 return id; 4083 } 4084 4085 /* 4086 * allocate an association and add it to the endpoint. The caller must be 4087 * careful to add all additional addresses once they are know right away or 4088 * else the assoc will be may experience a blackout scenario. 4089 */ 4090 struct sctp_tcb * 4091 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4092 int *error, uint32_t override_tag, uint32_t vrf_id, 4093 struct thread *p 4094 ) 4095 { 4096 /* note the p argument is only valid in unbound sockets */ 4097 4098 struct sctp_tcb *stcb; 4099 struct sctp_association *asoc; 4100 struct sctpasochead *head; 4101 uint16_t rport; 4102 int err; 4103 4104 /* 4105 * Assumption made here: Caller has done a 4106 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4107 * address does not exist already. 4108 */ 4109 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4110 /* Hit max assoc, sorry no more */ 4111 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4112 *error = ENOBUFS; 4113 return (NULL); 4114 } 4115 if (firstaddr == NULL) { 4116 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4117 *error = EINVAL; 4118 return (NULL); 4119 } 4120 SCTP_INP_RLOCK(inp); 4121 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4122 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4123 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4124 /* 4125 * If its in the TCP pool, its NOT allowed to create an 4126 * association. The parent listener needs to call 4127 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4128 * off, or connected one does this.. its an error. 4129 */ 4130 SCTP_INP_RUNLOCK(inp); 4131 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4132 *error = EINVAL; 4133 return (NULL); 4134 } 4135 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4136 #ifdef SCTP_DEBUG 4137 if (firstaddr) { 4138 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4139 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4140 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4141 } else { 4142 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4143 } 4144 #endif /* SCTP_DEBUG */ 4145 if (firstaddr->sa_family == AF_INET) { 4146 struct sockaddr_in *sin; 4147 4148 sin = (struct sockaddr_in *)firstaddr; 4149 if ((sin->sin_port == 0) || (sin->sin_addr.s_addr == 0)) { 4150 /* Invalid address */ 4151 SCTP_INP_RUNLOCK(inp); 4152 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4153 *error = EINVAL; 4154 return (NULL); 4155 } 4156 rport = sin->sin_port; 4157 } else if (firstaddr->sa_family == AF_INET6) { 4158 struct sockaddr_in6 *sin6; 4159 4160 sin6 = (struct sockaddr_in6 *)firstaddr; 4161 if ((sin6->sin6_port == 0) || 4162 (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr))) { 4163 /* Invalid address */ 4164 SCTP_INP_RUNLOCK(inp); 4165 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4166 *error = EINVAL; 4167 return (NULL); 4168 } 4169 rport = sin6->sin6_port; 4170 } else { 4171 /* not supported family type */ 4172 SCTP_INP_RUNLOCK(inp); 4173 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4174 *error = EINVAL; 4175 return (NULL); 4176 } 4177 SCTP_INP_RUNLOCK(inp); 4178 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4179 /* 4180 * If you have not performed a bind, then we need to do the 4181 * ephemeral bind for you. 4182 */ 4183 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4184 (struct sockaddr *)NULL, 4185 (struct sctp_ifa *)NULL, 4186 p 4187 ))) { 4188 /* bind error, probably perm */ 4189 *error = err; 4190 return (NULL); 4191 } 4192 } 4193 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4194 if (stcb == NULL) { 4195 /* out of memory? */ 4196 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4197 *error = ENOMEM; 4198 return (NULL); 4199 } 4200 SCTP_INCR_ASOC_COUNT(); 4201 4202 bzero(stcb, sizeof(*stcb)); 4203 asoc = &stcb->asoc; 4204 4205 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4206 SCTP_TCB_LOCK_INIT(stcb); 4207 SCTP_TCB_SEND_LOCK_INIT(stcb); 4208 stcb->rport = rport; 4209 /* setup back pointer's */ 4210 stcb->sctp_ep = inp; 4211 stcb->sctp_socket = inp->sctp_socket; 4212 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4213 /* failed */ 4214 SCTP_TCB_LOCK_DESTROY(stcb); 4215 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4216 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4217 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4218 SCTP_DECR_ASOC_COUNT(); 4219 *error = err; 4220 return (NULL); 4221 } 4222 /* and the port */ 4223 SCTP_INP_INFO_WLOCK(); 4224 SCTP_INP_WLOCK(inp); 4225 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4226 /* inpcb freed while alloc going on */ 4227 SCTP_TCB_LOCK_DESTROY(stcb); 4228 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4229 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4230 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4231 SCTP_INP_WUNLOCK(inp); 4232 SCTP_INP_INFO_WUNLOCK(); 4233 SCTP_DECR_ASOC_COUNT(); 4234 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4235 *error = EINVAL; 4236 return (NULL); 4237 } 4238 SCTP_TCB_LOCK(stcb); 4239 4240 /* now that my_vtag is set, add it to the hash */ 4241 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4242 /* put it in the bucket in the vtag hash of assoc's for the system */ 4243 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4244 SCTP_INP_INFO_WUNLOCK(); 4245 4246 if ((err = sctp_add_remote_addr(stcb, firstaddr, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4247 /* failure.. memory error? */ 4248 if (asoc->strmout) { 4249 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4250 asoc->strmout = NULL; 4251 } 4252 if (asoc->mapping_array) { 4253 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4254 asoc->mapping_array = NULL; 4255 } 4256 if (asoc->nr_mapping_array) { 4257 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4258 asoc->nr_mapping_array = NULL; 4259 } 4260 SCTP_DECR_ASOC_COUNT(); 4261 SCTP_TCB_LOCK_DESTROY(stcb); 4262 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4263 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4264 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4265 SCTP_INP_WUNLOCK(inp); 4266 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4267 *error = ENOBUFS; 4268 return (NULL); 4269 } 4270 /* Init all the timers */ 4271 SCTP_OS_TIMER_INIT(&asoc->hb_timer.timer); 4272 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4273 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4274 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4275 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4276 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4277 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4278 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4279 4280 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4281 /* now file the port under the hash as well */ 4282 if (inp->sctp_tcbhash != NULL) { 4283 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4284 inp->sctp_hashmark)]; 4285 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4286 } 4287 SCTP_INP_WUNLOCK(inp); 4288 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", stcb); 4289 return (stcb); 4290 } 4291 4292 4293 void 4294 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4295 { 4296 struct sctp_association *asoc; 4297 4298 asoc = &stcb->asoc; 4299 asoc->numnets--; 4300 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4301 if (net == asoc->primary_destination) { 4302 /* Reset primary */ 4303 struct sctp_nets *lnet; 4304 4305 lnet = TAILQ_FIRST(&asoc->nets); 4306 /* 4307 * Mobility adaptation Ideally, if deleted destination is 4308 * the primary, it becomes a fast retransmission trigger by 4309 * the subsequent SET PRIMARY. (by micchie) 4310 */ 4311 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4312 SCTP_MOBILITY_BASE) || 4313 sctp_is_mobility_feature_on(stcb->sctp_ep, 4314 SCTP_MOBILITY_FASTHANDOFF)) { 4315 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4316 if (asoc->deleted_primary != NULL) { 4317 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4318 goto out; 4319 } 4320 asoc->deleted_primary = net; 4321 atomic_add_int(&net->ref_count, 1); 4322 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4323 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4324 sctp_mobility_feature_on(stcb->sctp_ep, 4325 SCTP_MOBILITY_PRIM_DELETED); 4326 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4327 stcb->sctp_ep, stcb, NULL); 4328 } 4329 out: 4330 /* Try to find a confirmed primary */ 4331 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4332 } 4333 if (net == asoc->last_data_chunk_from) { 4334 /* Reset primary */ 4335 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4336 } 4337 if (net == asoc->last_control_chunk_from) { 4338 /* Clear net */ 4339 asoc->last_control_chunk_from = NULL; 4340 } 4341 sctp_free_remote_addr(net); 4342 } 4343 4344 /* 4345 * remove a remote endpoint address from an association, it will fail if the 4346 * address does not exist. 4347 */ 4348 int 4349 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4350 { 4351 /* 4352 * Here we need to remove a remote address. This is quite simple, we 4353 * first find it in the list of address for the association 4354 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4355 * on that item. Note we do not allow it to be removed if there are 4356 * no other addresses. 4357 */ 4358 struct sctp_association *asoc; 4359 struct sctp_nets *net, *nnet; 4360 4361 asoc = &stcb->asoc; 4362 4363 /* locate the address */ 4364 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4365 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4366 continue; 4367 } 4368 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4369 remaddr)) { 4370 /* we found the guy */ 4371 if (asoc->numnets < 2) { 4372 /* Must have at LEAST two remote addresses */ 4373 return (-1); 4374 } else { 4375 sctp_remove_net(stcb, net); 4376 return (0); 4377 } 4378 } 4379 } 4380 /* not found. */ 4381 return (-2); 4382 } 4383 4384 void 4385 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4386 { 4387 struct sctpvtaghead *chain; 4388 struct sctp_tagblock *twait_block; 4389 int found = 0; 4390 int i; 4391 4392 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4393 if (!LIST_EMPTY(chain)) { 4394 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4395 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4396 if ((twait_block->vtag_block[i].v_tag == tag) && 4397 (twait_block->vtag_block[i].lport == lport) && 4398 (twait_block->vtag_block[i].rport == rport)) { 4399 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4400 twait_block->vtag_block[i].v_tag = 0; 4401 twait_block->vtag_block[i].lport = 0; 4402 twait_block->vtag_block[i].rport = 0; 4403 found = 1; 4404 break; 4405 } 4406 } 4407 if (found) 4408 break; 4409 } 4410 } 4411 } 4412 4413 int 4414 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4415 { 4416 struct sctpvtaghead *chain; 4417 struct sctp_tagblock *twait_block; 4418 int found = 0; 4419 int i; 4420 4421 SCTP_INP_INFO_WLOCK(); 4422 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4423 if (!LIST_EMPTY(chain)) { 4424 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4425 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4426 if ((twait_block->vtag_block[i].v_tag == tag) && 4427 (twait_block->vtag_block[i].lport == lport) && 4428 (twait_block->vtag_block[i].rport == rport)) { 4429 found = 1; 4430 break; 4431 } 4432 } 4433 if (found) 4434 break; 4435 } 4436 } 4437 SCTP_INP_INFO_WUNLOCK(); 4438 return (found); 4439 } 4440 4441 4442 void 4443 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4444 { 4445 struct sctpvtaghead *chain; 4446 struct sctp_tagblock *twait_block; 4447 struct timeval now; 4448 int set, i; 4449 4450 if (time == 0) { 4451 /* Its disabled */ 4452 return; 4453 } 4454 (void)SCTP_GETTIME_TIMEVAL(&now); 4455 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4456 set = 0; 4457 if (!LIST_EMPTY(chain)) { 4458 /* Block(s) present, lets find space, and expire on the fly */ 4459 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4460 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4461 if ((twait_block->vtag_block[i].v_tag == 0) && 4462 !set) { 4463 twait_block->vtag_block[i].tv_sec_at_expire = 4464 now.tv_sec + time; 4465 twait_block->vtag_block[i].v_tag = tag; 4466 twait_block->vtag_block[i].lport = lport; 4467 twait_block->vtag_block[i].rport = rport; 4468 set = 1; 4469 } else if ((twait_block->vtag_block[i].v_tag) && 4470 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4471 /* Audit expires this guy */ 4472 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4473 twait_block->vtag_block[i].v_tag = 0; 4474 twait_block->vtag_block[i].lport = 0; 4475 twait_block->vtag_block[i].rport = 0; 4476 if (set == 0) { 4477 /* Reuse it for my new tag */ 4478 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4479 twait_block->vtag_block[i].v_tag = tag; 4480 twait_block->vtag_block[i].lport = lport; 4481 twait_block->vtag_block[i].rport = rport; 4482 set = 1; 4483 } 4484 } 4485 } 4486 if (set) { 4487 /* 4488 * We only do up to the block where we can 4489 * place our tag for audits 4490 */ 4491 break; 4492 } 4493 } 4494 } 4495 /* Need to add a new block to chain */ 4496 if (!set) { 4497 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4498 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4499 if (twait_block == NULL) { 4500 #ifdef INVARIANTS 4501 panic("Can not alloc tagblock"); 4502 #endif 4503 return; 4504 } 4505 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4506 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4507 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4508 twait_block->vtag_block[0].v_tag = tag; 4509 twait_block->vtag_block[0].lport = lport; 4510 twait_block->vtag_block[0].rport = rport; 4511 } 4512 } 4513 4514 4515 4516 /*- 4517 * Free the association after un-hashing the remote port. This 4518 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4519 * expect that the input to this function IS a locked TCB. 4520 * It will return 0, if it did NOT destroy the association (instead 4521 * it unlocks it. It will return NON-zero if it either destroyed the 4522 * association OR the association is already destroyed. 4523 */ 4524 int 4525 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4526 { 4527 int i; 4528 struct sctp_association *asoc; 4529 struct sctp_nets *net, *nnet; 4530 struct sctp_laddr *laddr, *naddr; 4531 struct sctp_tmit_chunk *chk, *nchk; 4532 struct sctp_asconf_addr *aparam, *naparam; 4533 struct sctp_asconf_ack *aack, *naack; 4534 struct sctp_stream_reset_list *strrst, *nstrrst; 4535 struct sctp_queued_to_read *sq, *nsq; 4536 struct sctp_stream_queue_pending *sp, *nsp; 4537 sctp_sharedkey_t *shared_key, *nshared_key; 4538 struct socket *so; 4539 4540 /* first, lets purge the entry from the hash table. */ 4541 4542 #ifdef SCTP_LOG_CLOSING 4543 sctp_log_closing(inp, stcb, 6); 4544 #endif 4545 if (stcb->asoc.state == 0) { 4546 #ifdef SCTP_LOG_CLOSING 4547 sctp_log_closing(inp, NULL, 7); 4548 #endif 4549 /* there is no asoc, really TSNH :-0 */ 4550 return (1); 4551 } 4552 /* TEMP CODE */ 4553 if (stcb->freed_from_where == 0) { 4554 /* Only record the first place free happened from */ 4555 stcb->freed_from_where = from_location; 4556 } 4557 /* TEMP CODE */ 4558 4559 asoc = &stcb->asoc; 4560 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4561 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4562 /* nothing around */ 4563 so = NULL; 4564 else 4565 so = inp->sctp_socket; 4566 4567 /* 4568 * We used timer based freeing if a reader or writer is in the way. 4569 * So we first check if we are actually being called from a timer, 4570 * if so we abort early if a reader or writer is still in the way. 4571 */ 4572 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4573 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4574 /* 4575 * is it the timer driving us? if so are the reader/writers 4576 * gone? 4577 */ 4578 if (stcb->asoc.refcnt) { 4579 /* nope, reader or writer in the way */ 4580 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4581 /* no asoc destroyed */ 4582 SCTP_TCB_UNLOCK(stcb); 4583 #ifdef SCTP_LOG_CLOSING 4584 sctp_log_closing(inp, stcb, 8); 4585 #endif 4586 return (0); 4587 } 4588 } 4589 /* now clean up any other timers */ 4590 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4591 asoc->hb_timer.self = NULL; 4592 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4593 asoc->dack_timer.self = NULL; 4594 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4595 /*- 4596 * For stream reset we don't blast this unless 4597 * it is a str-reset timer, it might be the 4598 * free-asoc timer which we DON'T want to 4599 * disturb. 4600 */ 4601 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4602 asoc->strreset_timer.self = NULL; 4603 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4604 asoc->asconf_timer.self = NULL; 4605 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4606 asoc->autoclose_timer.self = NULL; 4607 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4608 asoc->shut_guard_timer.self = NULL; 4609 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4610 asoc->delayed_event_timer.self = NULL; 4611 /* Mobility adaptation */ 4612 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4613 asoc->delete_prim_timer.self = NULL; 4614 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4615 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4616 net->fr_timer.self = NULL; 4617 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4618 net->rxt_timer.self = NULL; 4619 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4620 net->pmtu_timer.self = NULL; 4621 } 4622 /* Now the read queue needs to be cleaned up (only once) */ 4623 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4624 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4625 SCTP_INP_READ_LOCK(inp); 4626 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4627 if (sq->stcb == stcb) { 4628 sq->do_not_ref_stcb = 1; 4629 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4630 /* 4631 * If there is no end, there never will be 4632 * now. 4633 */ 4634 if (sq->end_added == 0) { 4635 /* Held for PD-API clear that. */ 4636 sq->pdapi_aborted = 1; 4637 sq->held_length = 0; 4638 if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4639 /* 4640 * Need to add a PD-API 4641 * aborted indication. 4642 * Setting the control_pdapi 4643 * assures that it will be 4644 * added right after this 4645 * msg. 4646 */ 4647 uint32_t strseq; 4648 4649 stcb->asoc.control_pdapi = sq; 4650 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4651 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4652 stcb, 4653 SCTP_PARTIAL_DELIVERY_ABORTED, 4654 (void *)&strseq, 4655 SCTP_SO_LOCKED); 4656 stcb->asoc.control_pdapi = NULL; 4657 } 4658 } 4659 /* Add an end to wake them */ 4660 sq->end_added = 1; 4661 } 4662 } 4663 SCTP_INP_READ_UNLOCK(inp); 4664 if (stcb->block_entry) { 4665 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4666 stcb->block_entry->error = ECONNRESET; 4667 stcb->block_entry = NULL; 4668 } 4669 } 4670 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4671 /* 4672 * Someone holds a reference OR the socket is unaccepted 4673 * yet. 4674 */ 4675 if ((stcb->asoc.refcnt) || 4676 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4677 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4678 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4679 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4680 } 4681 SCTP_TCB_UNLOCK(stcb); 4682 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4683 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4684 /* nothing around */ 4685 so = NULL; 4686 if (so) { 4687 /* Wake any reader/writers */ 4688 sctp_sorwakeup(inp, so); 4689 sctp_sowwakeup(inp, so); 4690 } 4691 #ifdef SCTP_LOG_CLOSING 4692 sctp_log_closing(inp, stcb, 9); 4693 #endif 4694 /* no asoc destroyed */ 4695 return (0); 4696 } 4697 #ifdef SCTP_LOG_CLOSING 4698 sctp_log_closing(inp, stcb, 10); 4699 #endif 4700 /* 4701 * When I reach here, no others want to kill the assoc yet.. and I 4702 * own the lock. Now its possible an abort comes in when I do the 4703 * lock exchange below to grab all the locks to do the final take 4704 * out. to prevent this we increment the count, which will start a 4705 * timer and blow out above thus assuring us that we hold exclusive 4706 * killing of the asoc. Note that after getting back the TCB lock we 4707 * will go ahead and increment the counter back up and stop any 4708 * timer a passing stranger may have started :-S 4709 */ 4710 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4711 atomic_add_int(&stcb->asoc.refcnt, 1); 4712 4713 SCTP_TCB_UNLOCK(stcb); 4714 SCTP_INP_INFO_WLOCK(); 4715 SCTP_INP_WLOCK(inp); 4716 SCTP_TCB_LOCK(stcb); 4717 } 4718 /* Double check the GONE flag */ 4719 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4720 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4721 /* nothing around */ 4722 so = NULL; 4723 4724 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4725 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4726 /* 4727 * For TCP type we need special handling when we are 4728 * connected. We also include the peel'ed off ones to. 4729 */ 4730 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4731 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4732 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4733 if (so) { 4734 SOCK_LOCK(so); 4735 if (so->so_rcv.sb_cc == 0) { 4736 so->so_state &= ~(SS_ISCONNECTING | 4737 SS_ISDISCONNECTING | 4738 SS_ISCONFIRMING | 4739 SS_ISCONNECTED); 4740 } 4741 socantrcvmore_locked(so); 4742 sctp_sowwakeup(inp, so); 4743 sctp_sorwakeup(inp, so); 4744 SCTP_SOWAKEUP(so); 4745 } 4746 } 4747 } 4748 /* 4749 * Make it invalid too, that way if its about to run it will abort 4750 * and return. 4751 */ 4752 /* re-increment the lock */ 4753 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4754 atomic_add_int(&stcb->asoc.refcnt, -1); 4755 } 4756 if (stcb->asoc.refcnt) { 4757 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4758 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4759 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4760 SCTP_INP_INFO_WUNLOCK(); 4761 SCTP_INP_WUNLOCK(inp); 4762 } 4763 SCTP_TCB_UNLOCK(stcb); 4764 return (0); 4765 } 4766 asoc->state = 0; 4767 if (inp->sctp_tcbhash) { 4768 LIST_REMOVE(stcb, sctp_tcbhash); 4769 } 4770 if (stcb->asoc.in_asocid_hash) { 4771 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4772 } 4773 /* Now lets remove it from the list of ALL associations in the EP */ 4774 LIST_REMOVE(stcb, sctp_tcblist); 4775 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4776 SCTP_INP_INCR_REF(inp); 4777 SCTP_INP_WUNLOCK(inp); 4778 } 4779 /* pull from vtag hash */ 4780 LIST_REMOVE(stcb, sctp_asocs); 4781 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4782 inp->sctp_lport, stcb->rport); 4783 4784 /* 4785 * Now restop the timers to be sure this is paranoia at is finest! 4786 */ 4787 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4788 (void)SCTP_OS_TIMER_STOP(&asoc->hb_timer.timer); 4789 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4790 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4791 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4792 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4793 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4794 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4795 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4796 (void)SCTP_OS_TIMER_STOP(&net->fr_timer.timer); 4797 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4798 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4799 } 4800 4801 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4802 /* 4803 * The chunk lists and such SHOULD be empty but we check them just 4804 * in case. 4805 */ 4806 /* anything on the wheel needs to be removed */ 4807 for (i = 0; i < asoc->streamoutcnt; i++) { 4808 struct sctp_stream_out *outs; 4809 4810 outs = &asoc->strmout[i]; 4811 /* now clean up any chunks here */ 4812 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4813 TAILQ_REMOVE(&outs->outqueue, sp, next); 4814 if (sp->data) { 4815 if (so) { 4816 /* Still an open socket - report */ 4817 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4818 SCTP_NOTIFY_DATAGRAM_UNSENT, 4819 (void *)sp, SCTP_SO_LOCKED); 4820 } 4821 if (sp->data) { 4822 sctp_m_freem(sp->data); 4823 sp->data = NULL; 4824 sp->tail_mbuf = NULL; 4825 } 4826 } 4827 if (sp->net) { 4828 sctp_free_remote_addr(sp->net); 4829 sp->net = NULL; 4830 } 4831 sctp_free_spbufspace(stcb, asoc, sp); 4832 if (sp->holds_key_ref) 4833 sctp_auth_key_release(stcb, sp->auth_keyid); 4834 /* Free the zone stuff */ 4835 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_strmoq), sp); 4836 SCTP_DECR_STRMOQ_COUNT(); 4837 /* sa_ignore FREED_MEMORY */ 4838 } 4839 } 4840 /* sa_ignore FREED_MEMORY */ 4841 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4842 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4843 SCTP_FREE(strrst, SCTP_M_STRESET); 4844 } 4845 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4846 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4847 if (sq->data) { 4848 sctp_m_freem(sq->data); 4849 sq->data = NULL; 4850 } 4851 sctp_free_remote_addr(sq->whoFrom); 4852 sq->whoFrom = NULL; 4853 sq->stcb = NULL; 4854 /* Free the ctl entry */ 4855 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4856 SCTP_DECR_READQ_COUNT(); 4857 /* sa_ignore FREED_MEMORY */ 4858 } 4859 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4860 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4861 if (chk->data) { 4862 sctp_m_freem(chk->data); 4863 chk->data = NULL; 4864 } 4865 if (chk->holds_key_ref) 4866 sctp_auth_key_release(stcb, chk->auth_keyid); 4867 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4868 SCTP_DECR_CHK_COUNT(); 4869 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4870 asoc->free_chunk_cnt--; 4871 /* sa_ignore FREED_MEMORY */ 4872 } 4873 /* pending send queue SHOULD be empty */ 4874 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4875 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4876 if (chk->data) { 4877 if (so) { 4878 /* Still a socket? */ 4879 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 4880 SCTP_NOTIFY_DATAGRAM_UNSENT, chk, SCTP_SO_LOCKED); 4881 } 4882 if (chk->data) { 4883 sctp_m_freem(chk->data); 4884 chk->data = NULL; 4885 } 4886 } 4887 if (chk->holds_key_ref) 4888 sctp_auth_key_release(stcb, chk->auth_keyid); 4889 if (chk->whoTo) { 4890 sctp_free_remote_addr(chk->whoTo); 4891 chk->whoTo = NULL; 4892 } 4893 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4894 SCTP_DECR_CHK_COUNT(); 4895 /* sa_ignore FREED_MEMORY */ 4896 } 4897 /* sent queue SHOULD be empty */ 4898 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4899 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4900 if (chk->data) { 4901 if (so) { 4902 /* Still a socket? */ 4903 sctp_ulp_notify(SCTP_NOTIFY_DG_FAIL, stcb, 4904 SCTP_NOTIFY_DATAGRAM_SENT, chk, SCTP_SO_LOCKED); 4905 } 4906 if (chk->data) { 4907 sctp_m_freem(chk->data); 4908 chk->data = NULL; 4909 } 4910 } 4911 if (chk->holds_key_ref) 4912 sctp_auth_key_release(stcb, chk->auth_keyid); 4913 sctp_free_remote_addr(chk->whoTo); 4914 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4915 SCTP_DECR_CHK_COUNT(); 4916 /* sa_ignore FREED_MEMORY */ 4917 } 4918 /* control queue MAY not be empty */ 4919 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 4920 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 4921 if (chk->data) { 4922 sctp_m_freem(chk->data); 4923 chk->data = NULL; 4924 } 4925 if (chk->holds_key_ref) 4926 sctp_auth_key_release(stcb, chk->auth_keyid); 4927 sctp_free_remote_addr(chk->whoTo); 4928 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4929 SCTP_DECR_CHK_COUNT(); 4930 /* sa_ignore FREED_MEMORY */ 4931 } 4932 /* ASCONF queue MAY not be empty */ 4933 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 4934 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 4935 if (chk->data) { 4936 sctp_m_freem(chk->data); 4937 chk->data = NULL; 4938 } 4939 if (chk->holds_key_ref) 4940 sctp_auth_key_release(stcb, chk->auth_keyid); 4941 sctp_free_remote_addr(chk->whoTo); 4942 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4943 SCTP_DECR_CHK_COUNT(); 4944 /* sa_ignore FREED_MEMORY */ 4945 } 4946 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 4947 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 4948 if (chk->data) { 4949 sctp_m_freem(chk->data); 4950 chk->data = NULL; 4951 } 4952 if (chk->holds_key_ref) 4953 sctp_auth_key_release(stcb, chk->auth_keyid); 4954 sctp_free_remote_addr(chk->whoTo); 4955 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4956 SCTP_DECR_CHK_COUNT(); 4957 /* sa_ignore FREED_MEMORY */ 4958 } 4959 4960 if (asoc->mapping_array) { 4961 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4962 asoc->mapping_array = NULL; 4963 } 4964 if (asoc->nr_mapping_array) { 4965 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4966 asoc->nr_mapping_array = NULL; 4967 } 4968 /* the stream outs */ 4969 if (asoc->strmout) { 4970 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4971 asoc->strmout = NULL; 4972 } 4973 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 4974 if (asoc->strmin) { 4975 struct sctp_queued_to_read *ctl, *nctl; 4976 4977 for (i = 0; i < asoc->streamincnt; i++) { 4978 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 4979 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 4980 sctp_free_remote_addr(ctl->whoFrom); 4981 if (ctl->data) { 4982 sctp_m_freem(ctl->data); 4983 ctl->data = NULL; 4984 } 4985 /* 4986 * We don't free the address here since all 4987 * the net's were freed above. 4988 */ 4989 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 4990 SCTP_DECR_READQ_COUNT(); 4991 } 4992 } 4993 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 4994 asoc->strmin = NULL; 4995 } 4996 asoc->streamincnt = 0; 4997 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4998 #ifdef INVARIANTS 4999 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5000 panic("no net's left alloc'ed, or list points to itself"); 5001 } 5002 #endif 5003 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5004 sctp_free_remote_addr(net); 5005 } 5006 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5007 /* sa_ignore FREED_MEMORY */ 5008 sctp_remove_laddr(laddr); 5009 } 5010 5011 /* pending asconf (address) parameters */ 5012 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5013 /* sa_ignore FREED_MEMORY */ 5014 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5015 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5016 } 5017 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5018 /* sa_ignore FREED_MEMORY */ 5019 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5020 if (aack->data != NULL) { 5021 sctp_m_freem(aack->data); 5022 } 5023 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5024 } 5025 /* clean up auth stuff */ 5026 if (asoc->local_hmacs) 5027 sctp_free_hmaclist(asoc->local_hmacs); 5028 if (asoc->peer_hmacs) 5029 sctp_free_hmaclist(asoc->peer_hmacs); 5030 5031 if (asoc->local_auth_chunks) 5032 sctp_free_chunklist(asoc->local_auth_chunks); 5033 if (asoc->peer_auth_chunks) 5034 sctp_free_chunklist(asoc->peer_auth_chunks); 5035 5036 sctp_free_authinfo(&asoc->authinfo); 5037 5038 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5039 LIST_REMOVE(shared_key, next); 5040 sctp_free_sharedkey(shared_key); 5041 /* sa_ignore FREED_MEMORY */ 5042 } 5043 5044 /* Insert new items here :> */ 5045 5046 /* Get rid of LOCK */ 5047 SCTP_TCB_LOCK_DESTROY(stcb); 5048 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5049 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5050 SCTP_INP_INFO_WUNLOCK(); 5051 SCTP_INP_RLOCK(inp); 5052 } 5053 #ifdef SCTP_TRACK_FREED_ASOCS 5054 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5055 /* now clean up the tasoc itself */ 5056 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5057 SCTP_DECR_ASOC_COUNT(); 5058 } else { 5059 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5060 } 5061 #else 5062 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5063 SCTP_DECR_ASOC_COUNT(); 5064 #endif 5065 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5066 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5067 /* 5068 * If its NOT the inp_free calling us AND sctp_close 5069 * as been called, we call back... 5070 */ 5071 SCTP_INP_RUNLOCK(inp); 5072 /* 5073 * This will start the kill timer (if we are the 5074 * last one) since we hold an increment yet. But 5075 * this is the only safe way to do this since 5076 * otherwise if the socket closes at the same time 5077 * we are here we might collide in the cleanup. 5078 */ 5079 sctp_inpcb_free(inp, 5080 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5081 SCTP_CALLED_DIRECTLY_NOCMPSET); 5082 SCTP_INP_DECR_REF(inp); 5083 goto out_of; 5084 } else { 5085 /* The socket is still open. */ 5086 SCTP_INP_DECR_REF(inp); 5087 } 5088 } 5089 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5090 SCTP_INP_RUNLOCK(inp); 5091 } 5092 out_of: 5093 /* destroyed the asoc */ 5094 #ifdef SCTP_LOG_CLOSING 5095 sctp_log_closing(inp, NULL, 11); 5096 #endif 5097 return (1); 5098 } 5099 5100 5101 5102 /* 5103 * determine if a destination is "reachable" based upon the addresses bound 5104 * to the current endpoint (e.g. only v4 or v6 currently bound) 5105 */ 5106 /* 5107 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5108 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5109 * types bound as its endpoint 5110 */ 5111 int 5112 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5113 { 5114 struct sctp_inpcb *inp; 5115 int answer; 5116 5117 /* 5118 * No locks here, the TCB, in all cases is already locked and an 5119 * assoc is up. There is either a INP lock by the caller applied (in 5120 * asconf case when deleting an address) or NOT in the HB case, 5121 * however if HB then the INP increment is up and the INP will not 5122 * be removed (on top of the fact that we have a TCB lock). So we 5123 * only want to read the sctp_flags, which is either bound-all or 5124 * not.. no protection needed since once an assoc is up you can't be 5125 * changing your binding. 5126 */ 5127 inp = stcb->sctp_ep; 5128 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5129 /* if bound all, destination is not restricted */ 5130 /* 5131 * RRS: Question during lock work: Is this correct? If you 5132 * are bound-all you still might need to obey the V4--V6 5133 * flags??? IMO this bound-all stuff needs to be removed! 5134 */ 5135 return (1); 5136 } 5137 /* NOTE: all "scope" checks are done when local addresses are added */ 5138 if (destaddr->sa_family == AF_INET6) { 5139 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5140 } else if (destaddr->sa_family == AF_INET) { 5141 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5142 } else { 5143 /* invalid family, so it's unreachable */ 5144 answer = 0; 5145 } 5146 return (answer); 5147 } 5148 5149 /* 5150 * update the inp_vflags on an endpoint 5151 */ 5152 static void 5153 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5154 { 5155 struct sctp_laddr *laddr; 5156 5157 /* first clear the flag */ 5158 inp->ip_inp.inp.inp_vflag = 0; 5159 /* set the flag based on addresses on the ep list */ 5160 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5161 if (laddr->ifa == NULL) { 5162 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5163 __FUNCTION__); 5164 continue; 5165 } 5166 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5167 continue; 5168 } 5169 if (laddr->ifa->address.sa.sa_family == AF_INET6) { 5170 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5171 } else if (laddr->ifa->address.sa.sa_family == AF_INET) { 5172 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5173 } 5174 } 5175 } 5176 5177 /* 5178 * Add the address to the endpoint local address list There is nothing to be 5179 * done if we are bound to all addresses 5180 */ 5181 void 5182 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5183 { 5184 struct sctp_laddr *laddr; 5185 int fnd, error = 0; 5186 5187 fnd = 0; 5188 5189 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5190 /* You are already bound to all. You have it already */ 5191 return; 5192 } 5193 if (ifa->address.sa.sa_family == AF_INET6) { 5194 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5195 /* Can't bind a non-useable addr. */ 5196 return; 5197 } 5198 } 5199 /* first, is it already present? */ 5200 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5201 if (laddr->ifa == ifa) { 5202 fnd = 1; 5203 break; 5204 } 5205 } 5206 5207 if (fnd == 0) { 5208 /* Not in the ep list */ 5209 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5210 if (error != 0) 5211 return; 5212 inp->laddr_count++; 5213 /* update inp_vflag flags */ 5214 if (ifa->address.sa.sa_family == AF_INET6) { 5215 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5216 } else if (ifa->address.sa.sa_family == AF_INET) { 5217 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5218 } 5219 } 5220 return; 5221 } 5222 5223 5224 /* 5225 * select a new (hopefully reachable) destination net (should only be used 5226 * when we deleted an ep addr that is the only usable source address to reach 5227 * the destination net) 5228 */ 5229 static void 5230 sctp_select_primary_destination(struct sctp_tcb *stcb) 5231 { 5232 struct sctp_nets *net; 5233 5234 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5235 /* for now, we'll just pick the first reachable one we find */ 5236 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5237 continue; 5238 if (sctp_destination_is_reachable(stcb, 5239 (struct sockaddr *)&net->ro._l_addr)) { 5240 /* found a reachable destination */ 5241 stcb->asoc.primary_destination = net; 5242 } 5243 } 5244 /* I can't there from here! ...we're gonna die shortly... */ 5245 } 5246 5247 5248 /* 5249 * Delete the address from the endpoint local address list There is nothing 5250 * to be done if we are bound to all addresses 5251 */ 5252 void 5253 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5254 { 5255 struct sctp_laddr *laddr; 5256 int fnd; 5257 5258 fnd = 0; 5259 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5260 /* You are already bound to all. You have it already */ 5261 return; 5262 } 5263 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5264 if (laddr->ifa == ifa) { 5265 fnd = 1; 5266 break; 5267 } 5268 } 5269 if (fnd && (inp->laddr_count < 2)) { 5270 /* can't delete unless there are at LEAST 2 addresses */ 5271 return; 5272 } 5273 if (fnd) { 5274 /* 5275 * clean up any use of this address go through our 5276 * associations and clear any last_used_address that match 5277 * this one for each assoc, see if a new primary_destination 5278 * is needed 5279 */ 5280 struct sctp_tcb *stcb; 5281 5282 /* clean up "next_addr_touse" */ 5283 if (inp->next_addr_touse == laddr) 5284 /* delete this address */ 5285 inp->next_addr_touse = NULL; 5286 5287 /* clean up "last_used_address" */ 5288 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5289 struct sctp_nets *net; 5290 5291 SCTP_TCB_LOCK(stcb); 5292 if (stcb->asoc.last_used_address == laddr) 5293 /* delete this address */ 5294 stcb->asoc.last_used_address = NULL; 5295 /* 5296 * Now spin through all the nets and purge any ref 5297 * to laddr 5298 */ 5299 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5300 if (net->ro._s_addr && 5301 (net->ro._s_addr->ifa == laddr->ifa)) { 5302 /* Yep, purge src address selected */ 5303 sctp_rtentry_t *rt; 5304 5305 /* delete this address if cached */ 5306 rt = net->ro.ro_rt; 5307 if (rt != NULL) { 5308 RTFREE(rt); 5309 net->ro.ro_rt = NULL; 5310 } 5311 sctp_free_ifa(net->ro._s_addr); 5312 net->ro._s_addr = NULL; 5313 net->src_addr_selected = 0; 5314 } 5315 } 5316 SCTP_TCB_UNLOCK(stcb); 5317 } /* for each tcb */ 5318 /* remove it from the ep list */ 5319 sctp_remove_laddr(laddr); 5320 inp->laddr_count--; 5321 /* update inp_vflag flags */ 5322 sctp_update_ep_vflag(inp); 5323 } 5324 return; 5325 } 5326 5327 /* 5328 * Add the address to the TCB local address restricted list. 5329 * This is a "pending" address list (eg. addresses waiting for an 5330 * ASCONF-ACK response) and cannot be used as a valid source address. 5331 */ 5332 void 5333 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5334 { 5335 struct sctp_inpcb *inp; 5336 struct sctp_laddr *laddr; 5337 struct sctpladdr *list; 5338 5339 /* 5340 * Assumes TCB is locked.. and possibly the INP. May need to 5341 * confirm/fix that if we need it and is not the case. 5342 */ 5343 list = &stcb->asoc.sctp_restricted_addrs; 5344 5345 inp = stcb->sctp_ep; 5346 if (ifa->address.sa.sa_family == AF_INET6) { 5347 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5348 /* Can't bind a non-existent addr. */ 5349 return; 5350 } 5351 } 5352 /* does the address already exist? */ 5353 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5354 if (laddr->ifa == ifa) { 5355 return; 5356 } 5357 } 5358 5359 /* add to the list */ 5360 (void)sctp_insert_laddr(list, ifa, 0); 5361 return; 5362 } 5363 5364 /* 5365 * insert an laddr entry with the given ifa for the desired list 5366 */ 5367 int 5368 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5369 { 5370 struct sctp_laddr *laddr; 5371 5372 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5373 if (laddr == NULL) { 5374 /* out of memory? */ 5375 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5376 return (EINVAL); 5377 } 5378 SCTP_INCR_LADDR_COUNT(); 5379 bzero(laddr, sizeof(*laddr)); 5380 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5381 laddr->ifa = ifa; 5382 laddr->action = act; 5383 atomic_add_int(&ifa->refcount, 1); 5384 /* insert it */ 5385 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5386 5387 return (0); 5388 } 5389 5390 /* 5391 * Remove an laddr entry from the local address list (on an assoc) 5392 */ 5393 void 5394 sctp_remove_laddr(struct sctp_laddr *laddr) 5395 { 5396 5397 /* remove from the list */ 5398 LIST_REMOVE(laddr, sctp_nxt_addr); 5399 sctp_free_ifa(laddr->ifa); 5400 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5401 SCTP_DECR_LADDR_COUNT(); 5402 } 5403 5404 /* 5405 * Remove a local address from the TCB local address restricted list 5406 */ 5407 void 5408 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5409 { 5410 struct sctp_inpcb *inp; 5411 struct sctp_laddr *laddr; 5412 5413 /* 5414 * This is called by asconf work. It is assumed that a) The TCB is 5415 * locked and b) The INP is locked. This is true in as much as I can 5416 * trace through the entry asconf code where I did these locks. 5417 * Again, the ASCONF code is a bit different in that it does lock 5418 * the INP during its work often times. This must be since we don't 5419 * want other proc's looking up things while what they are looking 5420 * up is changing :-D 5421 */ 5422 5423 inp = stcb->sctp_ep; 5424 /* if subset bound and don't allow ASCONF's, can't delete last */ 5425 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5426 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5427 if (stcb->sctp_ep->laddr_count < 2) { 5428 /* can't delete last address */ 5429 return; 5430 } 5431 } 5432 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5433 /* remove the address if it exists */ 5434 if (laddr->ifa == NULL) 5435 continue; 5436 if (laddr->ifa == ifa) { 5437 sctp_remove_laddr(laddr); 5438 return; 5439 } 5440 } 5441 5442 /* address not found! */ 5443 return; 5444 } 5445 5446 /* 5447 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5448 */ 5449 /* sysctl */ 5450 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5451 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5452 5453 5454 5455 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5456 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5457 int *sctp_cpuarry = NULL; 5458 void 5459 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5460 { 5461 /* Queue a packet to a processor for the specified core */ 5462 struct sctp_mcore_queue *qent; 5463 struct sctp_mcore_ctrl *wkq; 5464 int need_wake = 0; 5465 5466 if (sctp_mcore_workers == NULL) { 5467 /* Something went way bad during setup */ 5468 sctp_input_with_port(m, off, 0); 5469 return; 5470 } 5471 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5472 (sizeof(struct sctp_mcore_queue)), 5473 SCTP_M_MCORE); 5474 if (qent == NULL) { 5475 /* This is trouble */ 5476 sctp_input_with_port(m, off, 0); 5477 return; 5478 } 5479 qent->vn = curvnet; 5480 qent->m = m; 5481 qent->off = off; 5482 qent->v6 = 0; 5483 wkq = &sctp_mcore_workers[cpu_to_use]; 5484 SCTP_MCORE_QLOCK(wkq); 5485 5486 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5487 if (wkq->running == 0) { 5488 need_wake = 1; 5489 } 5490 SCTP_MCORE_QUNLOCK(wkq); 5491 if (need_wake) { 5492 wakeup(&wkq->running); 5493 } 5494 } 5495 5496 static void 5497 sctp_mcore_thread(void *arg) 5498 { 5499 5500 struct sctp_mcore_ctrl *wkq; 5501 struct sctp_mcore_queue *qent; 5502 5503 wkq = (struct sctp_mcore_ctrl *)arg; 5504 struct mbuf *m; 5505 int off, v6; 5506 5507 /* Wait for first tickle */ 5508 SCTP_MCORE_LOCK(wkq); 5509 wkq->running = 0; 5510 msleep(&wkq->running, 5511 &wkq->core_mtx, 5512 0, "wait for pkt", 0); 5513 SCTP_MCORE_UNLOCK(wkq); 5514 5515 /* Bind to our cpu */ 5516 thread_lock(curthread); 5517 sched_bind(curthread, wkq->cpuid); 5518 thread_unlock(curthread); 5519 5520 /* Now lets start working */ 5521 SCTP_MCORE_LOCK(wkq); 5522 /* Now grab lock and go */ 5523 while (1) { 5524 SCTP_MCORE_QLOCK(wkq); 5525 skip_sleep: 5526 wkq->running = 1; 5527 qent = TAILQ_FIRST(&wkq->que); 5528 if (qent) { 5529 TAILQ_REMOVE(&wkq->que, qent, next); 5530 SCTP_MCORE_QUNLOCK(wkq); 5531 CURVNET_SET(qent->vn); 5532 m = qent->m; 5533 off = qent->off; 5534 v6 = qent->v6; 5535 SCTP_FREE(qent, SCTP_M_MCORE); 5536 if (v6 == 0) { 5537 sctp_input_with_port(m, off, 0); 5538 } else { 5539 printf("V6 not yet supported\n"); 5540 sctp_m_freem(m); 5541 } 5542 CURVNET_RESTORE(); 5543 SCTP_MCORE_QLOCK(wkq); 5544 } 5545 wkq->running = 0; 5546 if (!TAILQ_EMPTY(&wkq->que)) { 5547 goto skip_sleep; 5548 } 5549 SCTP_MCORE_QUNLOCK(wkq); 5550 msleep(&wkq->running, 5551 &wkq->core_mtx, 5552 0, "wait for pkt", 0); 5553 }; 5554 } 5555 5556 static void 5557 sctp_startup_mcore_threads(void) 5558 { 5559 int i, cpu; 5560 5561 if (mp_ncpus == 1) 5562 return; 5563 5564 if (sctp_mcore_workers != NULL) { 5565 /* 5566 * Already been here in some previous vnet? 5567 */ 5568 return; 5569 } 5570 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5571 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5572 SCTP_M_MCORE); 5573 if (sctp_mcore_workers == NULL) { 5574 /* TSNH I hope */ 5575 return; 5576 } 5577 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5578 sizeof(struct sctp_mcore_ctrl))); 5579 /* Init the structures */ 5580 for (i = 0; i <= mp_maxid; i++) { 5581 TAILQ_INIT(&sctp_mcore_workers[i].que); 5582 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5583 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5584 sctp_mcore_workers[i].cpuid = i; 5585 } 5586 if (sctp_cpuarry == NULL) { 5587 SCTP_MALLOC(sctp_cpuarry, int *, 5588 (mp_ncpus * sizeof(int)), 5589 SCTP_M_MCORE); 5590 i = 0; 5591 CPU_FOREACH(cpu) { 5592 sctp_cpuarry[i] = cpu; 5593 i++; 5594 } 5595 } 5596 /* Now start them all */ 5597 CPU_FOREACH(cpu) { 5598 (void)kproc_create(sctp_mcore_thread, 5599 (void *)&sctp_mcore_workers[cpu], 5600 &sctp_mcore_workers[cpu].thread_proc, 5601 RFPROC, 5602 SCTP_KTHREAD_PAGES, 5603 SCTP_MCORE_NAME); 5604 5605 } 5606 } 5607 5608 #endif 5609 5610 void 5611 sctp_pcb_init() 5612 { 5613 /* 5614 * SCTP initialization for the PCB structures should be called by 5615 * the sctp_init() funciton. 5616 */ 5617 int i; 5618 struct timeval tv; 5619 5620 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5621 /* error I was called twice */ 5622 return; 5623 } 5624 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5625 5626 #if defined(SCTP_LOCAL_TRACE_BUF) 5627 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5628 #endif 5629 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5630 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5631 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5632 SCTP_M_MCORE); 5633 #endif 5634 (void)SCTP_GETTIME_TIMEVAL(&tv); 5635 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5636 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5637 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5638 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5639 #else 5640 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5641 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5642 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5643 #endif 5644 /* init the empty list of (All) Endpoints */ 5645 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5646 5647 5648 /* init the hash table of endpoints */ 5649 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5650 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5651 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5652 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5653 &SCTP_BASE_INFO(hashasocmark)); 5654 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5655 &SCTP_BASE_INFO(hashmark)); 5656 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5657 &SCTP_BASE_INFO(hashtcpmark)); 5658 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5659 5660 5661 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5662 &SCTP_BASE_INFO(hashvrfmark)); 5663 5664 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5665 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5666 /* init the zones */ 5667 /* 5668 * FIX ME: Should check for NULL returns, but if it does fail we are 5669 * doomed to panic anyways... add later maybe. 5670 */ 5671 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5672 sizeof(struct sctp_inpcb), maxsockets); 5673 5674 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5675 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5676 5677 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5678 sizeof(struct sctp_laddr), 5679 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5680 5681 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5682 sizeof(struct sctp_nets), 5683 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5684 5685 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5686 sizeof(struct sctp_tmit_chunk), 5687 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5688 5689 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5690 sizeof(struct sctp_queued_to_read), 5691 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5692 5693 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5694 sizeof(struct sctp_stream_queue_pending), 5695 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5696 5697 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5698 sizeof(struct sctp_asconf), 5699 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5700 5701 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5702 sizeof(struct sctp_asconf_ack), 5703 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5704 5705 5706 /* Master Lock INIT for info structure */ 5707 SCTP_INP_INFO_LOCK_INIT(); 5708 SCTP_STATLOG_INIT_LOCK(); 5709 5710 SCTP_IPI_COUNT_INIT(); 5711 SCTP_IPI_ADDR_INIT(); 5712 #ifdef SCTP_PACKET_LOGGING 5713 SCTP_IP_PKTLOG_INIT(); 5714 #endif 5715 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5716 5717 SCTP_WQ_ADDR_INIT(); 5718 /* not sure if we need all the counts */ 5719 SCTP_BASE_INFO(ipi_count_ep) = 0; 5720 /* assoc/tcb zone info */ 5721 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5722 /* local addrlist zone info */ 5723 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5724 /* remote addrlist zone info */ 5725 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5726 /* chunk info */ 5727 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5728 5729 /* socket queue zone info */ 5730 SCTP_BASE_INFO(ipi_count_readq) = 0; 5731 5732 /* stream out queue cont */ 5733 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5734 5735 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5736 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5737 5738 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5739 5740 /* Init the TIMEWAIT list */ 5741 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5742 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5743 } 5744 5745 sctp_startup_iterator(); 5746 5747 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5748 sctp_startup_mcore_threads(); 5749 #endif 5750 5751 /* 5752 * INIT the default VRF which for BSD is the only one, other O/S's 5753 * may have more. But initially they must start with one and then 5754 * add the VRF's as addresses are added. 5755 */ 5756 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5757 } 5758 5759 /* 5760 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5761 */ 5762 void 5763 sctp_pcb_finish(void) 5764 { 5765 struct sctp_vrflist *vrf_bucket; 5766 struct sctp_vrf *vrf, *nvrf; 5767 struct sctp_ifn *ifn, *nifn; 5768 struct sctp_ifa *ifa, *nifa; 5769 struct sctpvtaghead *chain; 5770 struct sctp_tagblock *twait_block, *prev_twait_block; 5771 struct sctp_laddr *wi, *nwi; 5772 int i; 5773 5774 /* 5775 * Free BSD the it thread never exits but we do clean up. The only 5776 * way freebsd reaches here if we have VRF's but we still add the 5777 * ifdef to make it compile on old versions. 5778 */ 5779 { 5780 struct sctp_iterator *it, *nit; 5781 5782 SCTP_IPI_ITERATOR_WQ_LOCK(); 5783 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5784 if (it->vn != curvnet) { 5785 continue; 5786 } 5787 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5788 if (it->function_atend != NULL) { 5789 (*it->function_atend) (it->pointer, it->val); 5790 } 5791 SCTP_FREE(it, SCTP_M_ITER); 5792 } 5793 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5794 SCTP_ITERATOR_LOCK(); 5795 if ((sctp_it_ctl.cur_it) && 5796 (sctp_it_ctl.cur_it->vn == curvnet)) { 5797 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5798 } 5799 SCTP_ITERATOR_UNLOCK(); 5800 } 5801 5802 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5803 SCTP_WQ_ADDR_LOCK(); 5804 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5805 LIST_REMOVE(wi, sctp_nxt_addr); 5806 SCTP_DECR_LADDR_COUNT(); 5807 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5808 } 5809 SCTP_WQ_ADDR_UNLOCK(); 5810 5811 /* 5812 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5813 * destroyed first). 5814 */ 5815 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5816 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5817 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5818 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5819 /* free the ifa */ 5820 LIST_REMOVE(ifa, next_bucket); 5821 LIST_REMOVE(ifa, next_ifa); 5822 SCTP_FREE(ifa, SCTP_M_IFA); 5823 } 5824 /* free the ifn */ 5825 LIST_REMOVE(ifn, next_bucket); 5826 LIST_REMOVE(ifn, next_ifn); 5827 SCTP_FREE(ifn, SCTP_M_IFN); 5828 } 5829 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5830 /* free the vrf */ 5831 LIST_REMOVE(vrf, next_vrf); 5832 SCTP_FREE(vrf, SCTP_M_VRF); 5833 } 5834 /* free the vrf hashes */ 5835 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5836 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5837 5838 /* 5839 * free the TIMEWAIT list elements malloc'd in the function 5840 * sctp_add_vtag_to_timewait()... 5841 */ 5842 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5843 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5844 if (!LIST_EMPTY(chain)) { 5845 prev_twait_block = NULL; 5846 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5847 if (prev_twait_block) { 5848 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5849 } 5850 prev_twait_block = twait_block; 5851 } 5852 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5853 } 5854 } 5855 5856 /* free the locks and mutexes */ 5857 #ifdef SCTP_PACKET_LOGGING 5858 SCTP_IP_PKTLOG_DESTROY(); 5859 #endif 5860 SCTP_IPI_ADDR_DESTROY(); 5861 SCTP_STATLOG_DESTROY(); 5862 SCTP_INP_INFO_LOCK_DESTROY(); 5863 5864 SCTP_WQ_ADDR_DESTROY(); 5865 5866 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5867 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5868 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5869 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5870 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5871 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5872 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5873 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5874 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5875 /* Get rid of other stuff to */ 5876 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5877 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5878 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5879 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 5880 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 5881 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 5882 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5883 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 5884 #endif 5885 } 5886 5887 5888 int 5889 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 5890 int iphlen, int offset, int limit, struct sctphdr *sh, 5891 struct sockaddr *altsa) 5892 { 5893 /* 5894 * grub through the INIT pulling addresses and loading them to the 5895 * nets structure in the asoc. The from address in the mbuf should 5896 * also be loaded (if it is not already). This routine can be called 5897 * with either INIT or INIT-ACK's as long as the m points to the IP 5898 * packet and the offset points to the beginning of the parameters. 5899 */ 5900 struct sctp_inpcb *inp, *l_inp; 5901 struct sctp_nets *net, *nnet, *net_tmp; 5902 struct ip *iph; 5903 struct sctp_paramhdr *phdr, parm_buf; 5904 struct sctp_tcb *stcb_tmp; 5905 uint16_t ptype, plen; 5906 struct sockaddr *sa; 5907 struct sockaddr_storage dest_store; 5908 struct sockaddr *local_sa = (struct sockaddr *)&dest_store; 5909 struct sockaddr_in sin; 5910 struct sockaddr_in6 sin6; 5911 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 5912 struct sctp_auth_random *p_random = NULL; 5913 uint16_t random_len = 0; 5914 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 5915 struct sctp_auth_hmac_algo *hmacs = NULL; 5916 uint16_t hmacs_len = 0; 5917 uint8_t saw_asconf = 0; 5918 uint8_t saw_asconf_ack = 0; 5919 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 5920 struct sctp_auth_chunk_list *chunks = NULL; 5921 uint16_t num_chunks = 0; 5922 sctp_key_t *new_key; 5923 uint32_t keylen; 5924 int got_random = 0, got_hmacs = 0, got_chklist = 0; 5925 uint8_t ecn_allowed; 5926 5927 /* First get the destination address setup too. */ 5928 memset(&sin, 0, sizeof(sin)); 5929 memset(&sin6, 0, sizeof(sin6)); 5930 5931 sin.sin_family = AF_INET; 5932 sin.sin_len = sizeof(sin); 5933 sin.sin_port = stcb->rport; 5934 5935 sin6.sin6_family = AF_INET6; 5936 sin6.sin6_len = sizeof(struct sockaddr_in6); 5937 sin6.sin6_port = stcb->rport; 5938 if (altsa == NULL) { 5939 iph = mtod(m, struct ip *); 5940 switch (iph->ip_v) { 5941 case IPVERSION: 5942 { 5943 /* its IPv4 */ 5944 struct sockaddr_in *sin_2; 5945 5946 sin_2 = (struct sockaddr_in *)(local_sa); 5947 memset(sin_2, 0, sizeof(sin)); 5948 sin_2->sin_family = AF_INET; 5949 sin_2->sin_len = sizeof(sin); 5950 sin_2->sin_port = sh->dest_port; 5951 sin_2->sin_addr.s_addr = iph->ip_dst.s_addr; 5952 sin.sin_addr = iph->ip_src; 5953 sa = (struct sockaddr *)&sin; 5954 break; 5955 } 5956 #ifdef INET6 5957 case IPV6_VERSION >> 4: 5958 { 5959 /* its IPv6 */ 5960 struct ip6_hdr *ip6; 5961 struct sockaddr_in6 *sin6_2; 5962 5963 ip6 = mtod(m, struct ip6_hdr *); 5964 sin6_2 = (struct sockaddr_in6 *)(local_sa); 5965 memset(sin6_2, 0, sizeof(sin6)); 5966 sin6_2->sin6_family = AF_INET6; 5967 sin6_2->sin6_len = sizeof(struct sockaddr_in6); 5968 sin6_2->sin6_port = sh->dest_port; 5969 sin6.sin6_addr = ip6->ip6_src; 5970 sa = (struct sockaddr *)&sin6; 5971 break; 5972 } 5973 #endif 5974 default: 5975 return (-1); 5976 break; 5977 } 5978 } else { 5979 /* 5980 * For cookies we use the src address NOT from the packet 5981 * but from the original INIT 5982 */ 5983 sa = altsa; 5984 } 5985 /* Turn off ECN until we get through all params */ 5986 ecn_allowed = 0; 5987 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5988 /* mark all addresses that we have currently on the list */ 5989 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 5990 } 5991 /* does the source address already exist? if so skip it */ 5992 l_inp = inp = stcb->sctp_ep; 5993 5994 atomic_add_int(&stcb->asoc.refcnt, 1); 5995 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, local_sa, stcb); 5996 atomic_add_int(&stcb->asoc.refcnt, -1); 5997 5998 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 5999 /* we must add the source address */ 6000 /* no scope set here since we have a tcb already. */ 6001 if ((sa->sa_family == AF_INET) && 6002 (stcb->asoc.ipv4_addr_legal)) { 6003 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6004 return (-1); 6005 } 6006 } else if ((sa->sa_family == AF_INET6) && 6007 (stcb->asoc.ipv6_addr_legal)) { 6008 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6009 return (-2); 6010 } 6011 } 6012 } else { 6013 if (net_tmp != NULL && stcb_tmp == stcb) { 6014 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6015 } else if (stcb_tmp != stcb) { 6016 /* It belongs to another association? */ 6017 if (stcb_tmp) 6018 SCTP_TCB_UNLOCK(stcb_tmp); 6019 return (-3); 6020 } 6021 } 6022 if (stcb->asoc.state == 0) { 6023 /* the assoc was freed? */ 6024 return (-4); 6025 } 6026 /* 6027 * peer must explicitly turn this on. This may have been initialized 6028 * to be "on" in order to allow local addr changes while INIT's are 6029 * in flight. 6030 */ 6031 stcb->asoc.peer_supports_asconf = 0; 6032 /* now we must go through each of the params. */ 6033 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6034 while (phdr) { 6035 ptype = ntohs(phdr->param_type); 6036 plen = ntohs(phdr->param_length); 6037 /* 6038 * printf("ptype => %0x, plen => %d\n", (uint32_t)ptype, 6039 * (int)plen); 6040 */ 6041 if (offset + plen > limit) { 6042 break; 6043 } 6044 if (plen == 0) { 6045 break; 6046 } 6047 if (ptype == SCTP_IPV4_ADDRESS) { 6048 if (stcb->asoc.ipv4_addr_legal) { 6049 struct sctp_ipv4addr_param *p4, p4_buf; 6050 6051 /* ok get the v4 address and check/add */ 6052 phdr = sctp_get_next_param(m, offset, 6053 (struct sctp_paramhdr *)&p4_buf, 6054 sizeof(p4_buf)); 6055 if (plen != sizeof(struct sctp_ipv4addr_param) || 6056 phdr == NULL) { 6057 return (-5); 6058 } 6059 p4 = (struct sctp_ipv4addr_param *)phdr; 6060 sin.sin_addr.s_addr = p4->addr; 6061 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6062 /* Skip multi-cast addresses */ 6063 goto next_param; 6064 } 6065 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6066 (sin.sin_addr.s_addr == INADDR_ANY)) { 6067 goto next_param; 6068 } 6069 sa = (struct sockaddr *)&sin; 6070 inp = stcb->sctp_ep; 6071 atomic_add_int(&stcb->asoc.refcnt, 1); 6072 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6073 local_sa, stcb); 6074 atomic_add_int(&stcb->asoc.refcnt, -1); 6075 6076 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6077 inp == NULL) { 6078 /* we must add the source address */ 6079 /* 6080 * no scope set since we have a tcb 6081 * already 6082 */ 6083 6084 /* 6085 * we must validate the state again 6086 * here 6087 */ 6088 add_it_now: 6089 if (stcb->asoc.state == 0) { 6090 /* the assoc was freed? */ 6091 return (-7); 6092 } 6093 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6094 return (-8); 6095 } 6096 } else if (stcb_tmp == stcb) { 6097 if (stcb->asoc.state == 0) { 6098 /* the assoc was freed? */ 6099 return (-10); 6100 } 6101 if (net != NULL) { 6102 /* clear flag */ 6103 net->dest_state &= 6104 ~SCTP_ADDR_NOT_IN_ASSOC; 6105 } 6106 } else { 6107 /* 6108 * strange, address is in another 6109 * assoc? straighten out locks. 6110 */ 6111 if (stcb_tmp) { 6112 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6113 /* 6114 * in setup state we 6115 * abort this guy 6116 */ 6117 sctp_abort_an_association(stcb_tmp->sctp_ep, 6118 stcb_tmp, 1, NULL, 0); 6119 goto add_it_now; 6120 } 6121 SCTP_TCB_UNLOCK(stcb_tmp); 6122 } 6123 if (stcb->asoc.state == 0) { 6124 /* the assoc was freed? */ 6125 return (-12); 6126 } 6127 return (-13); 6128 } 6129 } 6130 } else if (ptype == SCTP_IPV6_ADDRESS) { 6131 if (stcb->asoc.ipv6_addr_legal) { 6132 /* ok get the v6 address and check/add */ 6133 struct sctp_ipv6addr_param *p6, p6_buf; 6134 6135 phdr = sctp_get_next_param(m, offset, 6136 (struct sctp_paramhdr *)&p6_buf, 6137 sizeof(p6_buf)); 6138 if (plen != sizeof(struct sctp_ipv6addr_param) || 6139 phdr == NULL) { 6140 return (-14); 6141 } 6142 p6 = (struct sctp_ipv6addr_param *)phdr; 6143 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6144 sizeof(p6->addr)); 6145 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6146 /* Skip multi-cast addresses */ 6147 goto next_param; 6148 } 6149 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6150 /* 6151 * Link local make no sense without 6152 * scope 6153 */ 6154 goto next_param; 6155 } 6156 sa = (struct sockaddr *)&sin6; 6157 inp = stcb->sctp_ep; 6158 atomic_add_int(&stcb->asoc.refcnt, 1); 6159 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6160 local_sa, stcb); 6161 atomic_add_int(&stcb->asoc.refcnt, -1); 6162 if (stcb_tmp == NULL && 6163 (inp == stcb->sctp_ep || inp == NULL)) { 6164 /* 6165 * we must validate the state again 6166 * here 6167 */ 6168 add_it_now6: 6169 if (stcb->asoc.state == 0) { 6170 /* the assoc was freed? */ 6171 return (-16); 6172 } 6173 /* 6174 * we must add the address, no scope 6175 * set 6176 */ 6177 if (sctp_add_remote_addr(stcb, sa, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6178 return (-17); 6179 } 6180 } else if (stcb_tmp == stcb) { 6181 /* 6182 * we must validate the state again 6183 * here 6184 */ 6185 if (stcb->asoc.state == 0) { 6186 /* the assoc was freed? */ 6187 return (-19); 6188 } 6189 if (net != NULL) { 6190 /* clear flag */ 6191 net->dest_state &= 6192 ~SCTP_ADDR_NOT_IN_ASSOC; 6193 } 6194 } else { 6195 /* 6196 * strange, address is in another 6197 * assoc? straighten out locks. 6198 */ 6199 if (stcb_tmp) 6200 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6201 /* 6202 * in setup state we 6203 * abort this guy 6204 */ 6205 sctp_abort_an_association(stcb_tmp->sctp_ep, 6206 stcb_tmp, 1, NULL, 0); 6207 goto add_it_now6; 6208 } 6209 SCTP_TCB_UNLOCK(stcb_tmp); 6210 6211 if (stcb->asoc.state == 0) { 6212 /* the assoc was freed? */ 6213 return (-21); 6214 } 6215 return (-22); 6216 } 6217 } 6218 } else if (ptype == SCTP_ECN_CAPABLE) { 6219 ecn_allowed = 1; 6220 } else if (ptype == SCTP_ULP_ADAPTATION) { 6221 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6222 struct sctp_adaptation_layer_indication ai, 6223 *aip; 6224 6225 phdr = sctp_get_next_param(m, offset, 6226 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6227 aip = (struct sctp_adaptation_layer_indication *)phdr; 6228 if (aip) { 6229 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6230 stcb->asoc.adaptation_needed = 1; 6231 } 6232 } 6233 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6234 struct sctp_asconf_addr_param lstore, *fee; 6235 struct sctp_asconf_addrv4_param *fii; 6236 int lptype; 6237 struct sockaddr *lsa = NULL; 6238 6239 stcb->asoc.peer_supports_asconf = 1; 6240 if (plen > sizeof(lstore)) { 6241 return (-23); 6242 } 6243 phdr = sctp_get_next_param(m, offset, 6244 (struct sctp_paramhdr *)&lstore, 6245 min(plen, sizeof(lstore))); 6246 if (phdr == NULL) { 6247 return (-24); 6248 } 6249 fee = (struct sctp_asconf_addr_param *)phdr; 6250 lptype = ntohs(fee->addrp.ph.param_type); 6251 if (lptype == SCTP_IPV4_ADDRESS) { 6252 if (plen != 6253 sizeof(struct sctp_asconf_addrv4_param)) { 6254 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6255 (int)sizeof(struct sctp_asconf_addrv4_param), 6256 plen); 6257 } else { 6258 fii = (struct sctp_asconf_addrv4_param *)fee; 6259 sin.sin_addr.s_addr = fii->addrp.addr; 6260 lsa = (struct sockaddr *)&sin; 6261 } 6262 } else if (lptype == SCTP_IPV6_ADDRESS) { 6263 if (plen != 6264 sizeof(struct sctp_asconf_addr_param)) { 6265 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6266 (int)sizeof(struct sctp_asconf_addr_param), 6267 plen); 6268 } else { 6269 memcpy(sin6.sin6_addr.s6_addr, 6270 fee->addrp.addr, 6271 sizeof(fee->addrp.addr)); 6272 lsa = (struct sockaddr *)&sin6; 6273 } 6274 } 6275 if (lsa) { 6276 (void)sctp_set_primary_addr(stcb, sa, NULL); 6277 } 6278 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6279 stcb->asoc.peer_supports_nat = 1; 6280 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6281 /* Peer supports pr-sctp */ 6282 stcb->asoc.peer_supports_prsctp = 1; 6283 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6284 /* A supported extension chunk */ 6285 struct sctp_supported_chunk_types_param *pr_supported; 6286 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6287 int num_ent, i; 6288 6289 phdr = sctp_get_next_param(m, offset, 6290 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6291 if (phdr == NULL) { 6292 return (-25); 6293 } 6294 stcb->asoc.peer_supports_asconf = 0; 6295 stcb->asoc.peer_supports_prsctp = 0; 6296 stcb->asoc.peer_supports_pktdrop = 0; 6297 stcb->asoc.peer_supports_strreset = 0; 6298 stcb->asoc.peer_supports_nr_sack = 0; 6299 stcb->asoc.peer_supports_auth = 0; 6300 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6301 num_ent = plen - sizeof(struct sctp_paramhdr); 6302 for (i = 0; i < num_ent; i++) { 6303 switch (pr_supported->chunk_types[i]) { 6304 case SCTP_ASCONF: 6305 case SCTP_ASCONF_ACK: 6306 stcb->asoc.peer_supports_asconf = 1; 6307 break; 6308 case SCTP_FORWARD_CUM_TSN: 6309 stcb->asoc.peer_supports_prsctp = 1; 6310 break; 6311 case SCTP_PACKET_DROPPED: 6312 stcb->asoc.peer_supports_pktdrop = 1; 6313 break; 6314 case SCTP_NR_SELECTIVE_ACK: 6315 stcb->asoc.peer_supports_nr_sack = 1; 6316 break; 6317 case SCTP_STREAM_RESET: 6318 stcb->asoc.peer_supports_strreset = 1; 6319 break; 6320 case SCTP_AUTHENTICATION: 6321 stcb->asoc.peer_supports_auth = 1; 6322 break; 6323 default: 6324 /* one I have not learned yet */ 6325 break; 6326 6327 } 6328 } 6329 } else if (ptype == SCTP_RANDOM) { 6330 if (plen > sizeof(random_store)) 6331 break; 6332 if (got_random) { 6333 /* already processed a RANDOM */ 6334 goto next_param; 6335 } 6336 phdr = sctp_get_next_param(m, offset, 6337 (struct sctp_paramhdr *)random_store, 6338 min(sizeof(random_store), plen)); 6339 if (phdr == NULL) 6340 return (-26); 6341 p_random = (struct sctp_auth_random *)phdr; 6342 random_len = plen - sizeof(*p_random); 6343 /* enforce the random length */ 6344 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6345 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6346 return (-27); 6347 } 6348 got_random = 1; 6349 } else if (ptype == SCTP_HMAC_LIST) { 6350 int num_hmacs; 6351 int i; 6352 6353 if (plen > sizeof(hmacs_store)) 6354 break; 6355 if (got_hmacs) { 6356 /* already processed a HMAC list */ 6357 goto next_param; 6358 } 6359 phdr = sctp_get_next_param(m, offset, 6360 (struct sctp_paramhdr *)hmacs_store, 6361 min(plen, sizeof(hmacs_store))); 6362 if (phdr == NULL) 6363 return (-28); 6364 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6365 hmacs_len = plen - sizeof(*hmacs); 6366 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6367 /* validate the hmac list */ 6368 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6369 return (-29); 6370 } 6371 if (stcb->asoc.peer_hmacs != NULL) 6372 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6373 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6374 if (stcb->asoc.peer_hmacs != NULL) { 6375 for (i = 0; i < num_hmacs; i++) { 6376 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6377 ntohs(hmacs->hmac_ids[i])); 6378 } 6379 } 6380 got_hmacs = 1; 6381 } else if (ptype == SCTP_CHUNK_LIST) { 6382 int i; 6383 6384 if (plen > sizeof(chunks_store)) 6385 break; 6386 if (got_chklist) { 6387 /* already processed a Chunks list */ 6388 goto next_param; 6389 } 6390 phdr = sctp_get_next_param(m, offset, 6391 (struct sctp_paramhdr *)chunks_store, 6392 min(plen, sizeof(chunks_store))); 6393 if (phdr == NULL) 6394 return (-30); 6395 chunks = (struct sctp_auth_chunk_list *)phdr; 6396 num_chunks = plen - sizeof(*chunks); 6397 if (stcb->asoc.peer_auth_chunks != NULL) 6398 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6399 else 6400 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6401 for (i = 0; i < num_chunks; i++) { 6402 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6403 stcb->asoc.peer_auth_chunks); 6404 /* record asconf/asconf-ack if listed */ 6405 if (chunks->chunk_types[i] == SCTP_ASCONF) 6406 saw_asconf = 1; 6407 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6408 saw_asconf_ack = 1; 6409 6410 } 6411 got_chklist = 1; 6412 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6413 (ptype == SCTP_STATE_COOKIE) || 6414 (ptype == SCTP_UNRECOG_PARAM) || 6415 (ptype == SCTP_COOKIE_PRESERVE) || 6416 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6417 (ptype == SCTP_ADD_IP_ADDRESS) || 6418 (ptype == SCTP_DEL_IP_ADDRESS) || 6419 (ptype == SCTP_ERROR_CAUSE_IND) || 6420 (ptype == SCTP_SUCCESS_REPORT)) { 6421 /* don't care */ ; 6422 } else { 6423 if ((ptype & 0x8000) == 0x0000) { 6424 /* 6425 * must stop processing the rest of the 6426 * param's. Any report bits were handled 6427 * with the call to 6428 * sctp_arethere_unrecognized_parameters() 6429 * when the INIT or INIT-ACK was first seen. 6430 */ 6431 break; 6432 } 6433 } 6434 6435 next_param: 6436 offset += SCTP_SIZE32(plen); 6437 if (offset >= limit) { 6438 break; 6439 } 6440 phdr = sctp_get_next_param(m, offset, &parm_buf, 6441 sizeof(parm_buf)); 6442 } 6443 /* Now check to see if we need to purge any addresses */ 6444 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6445 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6446 SCTP_ADDR_NOT_IN_ASSOC) { 6447 /* This address has been removed from the asoc */ 6448 /* remove and free it */ 6449 stcb->asoc.numnets--; 6450 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6451 sctp_free_remote_addr(net); 6452 if (net == stcb->asoc.primary_destination) { 6453 stcb->asoc.primary_destination = NULL; 6454 sctp_select_primary_destination(stcb); 6455 } 6456 } 6457 } 6458 if (ecn_allowed == 0) { 6459 stcb->asoc.ecn_allowed = 0; 6460 } 6461 /* validate authentication required parameters */ 6462 if (got_random && got_hmacs) { 6463 stcb->asoc.peer_supports_auth = 1; 6464 } else { 6465 stcb->asoc.peer_supports_auth = 0; 6466 } 6467 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6468 /* peer does not support auth but sent a chunks list? */ 6469 return (-31); 6470 } 6471 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6472 !stcb->asoc.peer_supports_auth) { 6473 /* peer supports asconf but not auth? */ 6474 return (-32); 6475 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6476 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6477 return (-33); 6478 } 6479 /* concatenate the full random key */ 6480 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6481 if (chunks != NULL) { 6482 keylen += sizeof(*chunks) + num_chunks; 6483 } 6484 new_key = sctp_alloc_key(keylen); 6485 if (new_key != NULL) { 6486 /* copy in the RANDOM */ 6487 if (p_random != NULL) { 6488 keylen = sizeof(*p_random) + random_len; 6489 bcopy(p_random, new_key->key, keylen); 6490 } 6491 /* append in the AUTH chunks */ 6492 if (chunks != NULL) { 6493 bcopy(chunks, new_key->key + keylen, 6494 sizeof(*chunks) + num_chunks); 6495 keylen += sizeof(*chunks) + num_chunks; 6496 } 6497 /* append in the HMACs */ 6498 if (hmacs != NULL) { 6499 bcopy(hmacs, new_key->key + keylen, 6500 sizeof(*hmacs) + hmacs_len); 6501 } 6502 } else { 6503 /* failed to get memory for the key */ 6504 return (-34); 6505 } 6506 if (stcb->asoc.authinfo.peer_random != NULL) 6507 sctp_free_key(stcb->asoc.authinfo.peer_random); 6508 stcb->asoc.authinfo.peer_random = new_key; 6509 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6510 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6511 6512 return (0); 6513 } 6514 6515 int 6516 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6517 struct sctp_nets *net) 6518 { 6519 /* make sure the requested primary address exists in the assoc */ 6520 if (net == NULL && sa) 6521 net = sctp_findnet(stcb, sa); 6522 6523 if (net == NULL) { 6524 /* didn't find the requested primary address! */ 6525 return (-1); 6526 } else { 6527 /* set the primary address */ 6528 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6529 /* Must be confirmed, so queue to set */ 6530 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6531 return (0); 6532 } 6533 stcb->asoc.primary_destination = net; 6534 net->dest_state &= ~SCTP_ADDR_WAS_PRIMARY; 6535 net = TAILQ_FIRST(&stcb->asoc.nets); 6536 if (net != stcb->asoc.primary_destination) { 6537 /* 6538 * first one on the list is NOT the primary 6539 * sctp_cmpaddr() is much more efficient if the 6540 * primary is the first on the list, make it so. 6541 */ 6542 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6543 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6544 } 6545 return (0); 6546 } 6547 } 6548 6549 int 6550 sctp_is_vtag_good(struct sctp_inpcb *inp, uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now, int save_in_twait) 6551 { 6552 /* 6553 * This function serves two purposes. It will see if a TAG can be 6554 * re-used and return 1 for yes it is ok and 0 for don't use that 6555 * tag. A secondary function it will do is purge out old tags that 6556 * can be removed. 6557 */ 6558 struct sctpvtaghead *chain; 6559 struct sctp_tagblock *twait_block; 6560 struct sctpasochead *head; 6561 struct sctp_tcb *stcb; 6562 int i; 6563 6564 SCTP_INP_INFO_RLOCK(); 6565 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6566 SCTP_BASE_INFO(hashasocmark))]; 6567 if (head == NULL) { 6568 /* invalid vtag */ 6569 goto skip_vtag_check; 6570 } 6571 LIST_FOREACH(stcb, head, sctp_asocs) { 6572 /* 6573 * We choose not to lock anything here. TCB's can't be 6574 * removed since we have the read lock, so they can't be 6575 * freed on us, same thing for the INP. I may be wrong with 6576 * this assumption, but we will go with it for now :-) 6577 */ 6578 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6579 continue; 6580 } 6581 if (stcb->asoc.my_vtag == tag) { 6582 /* candidate */ 6583 if (stcb->rport != rport) { 6584 continue; 6585 } 6586 if (stcb->sctp_ep->sctp_lport != lport) { 6587 continue; 6588 } 6589 /* Its a used tag set */ 6590 SCTP_INP_INFO_RUNLOCK(); 6591 return (0); 6592 } 6593 } 6594 skip_vtag_check: 6595 6596 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6597 /* Now what about timed wait ? */ 6598 if (!LIST_EMPTY(chain)) { 6599 /* 6600 * Block(s) are present, lets see if we have this tag in the 6601 * list 6602 */ 6603 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6604 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6605 if (twait_block->vtag_block[i].v_tag == 0) { 6606 /* not used */ 6607 continue; 6608 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6609 now->tv_sec) { 6610 /* Audit expires this guy */ 6611 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6612 twait_block->vtag_block[i].v_tag = 0; 6613 twait_block->vtag_block[i].lport = 0; 6614 twait_block->vtag_block[i].rport = 0; 6615 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6616 (twait_block->vtag_block[i].lport == lport) && 6617 (twait_block->vtag_block[i].rport == rport)) { 6618 /* Bad tag, sorry :< */ 6619 SCTP_INP_INFO_RUNLOCK(); 6620 return (0); 6621 } 6622 } 6623 } 6624 } 6625 SCTP_INP_INFO_RUNLOCK(); 6626 return (1); 6627 } 6628 6629 6630 static sctp_assoc_t reneged_asoc_ids[256]; 6631 static uint8_t reneged_at = 0; 6632 6633 6634 static void 6635 sctp_drain_mbufs(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 6636 { 6637 /* 6638 * We must hunt this association for MBUF's past the cumack (i.e. 6639 * out of order data that we can renege on). 6640 */ 6641 struct sctp_association *asoc; 6642 struct sctp_tmit_chunk *chk, *nchk; 6643 uint32_t cumulative_tsn_p1; 6644 struct sctp_queued_to_read *ctl, *nctl; 6645 int cnt, strmat; 6646 uint32_t gap, i; 6647 int fnd = 0; 6648 6649 /* We look for anything larger than the cum-ack + 1 */ 6650 6651 asoc = &stcb->asoc; 6652 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6653 /* none we can reneg on. */ 6654 return; 6655 } 6656 SCTP_STAT_INCR(sctps_protocol_drains_done); 6657 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6658 cnt = 0; 6659 /* First look in the re-assembly queue */ 6660 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6661 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6662 /* Yep it is above cum-ack */ 6663 cnt++; 6664 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6665 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6666 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6667 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6668 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6669 if (chk->data) { 6670 sctp_m_freem(chk->data); 6671 chk->data = NULL; 6672 } 6673 sctp_free_a_chunk(stcb, chk); 6674 } 6675 } 6676 /* Ok that was fun, now we will drain all the inbound streams? */ 6677 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6678 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6679 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6680 /* Yep it is above cum-ack */ 6681 cnt++; 6682 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6683 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6684 sctp_ucount_decr(asoc->cnt_on_all_streams); 6685 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6686 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6687 if (ctl->data) { 6688 sctp_m_freem(ctl->data); 6689 ctl->data = NULL; 6690 } 6691 sctp_free_remote_addr(ctl->whoFrom); 6692 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6693 SCTP_DECR_READQ_COUNT(); 6694 } 6695 } 6696 } 6697 if (cnt) { 6698 /* We must back down to see what the new highest is */ 6699 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6700 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6701 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6702 asoc->highest_tsn_inside_map = i; 6703 fnd = 1; 6704 break; 6705 } 6706 } 6707 if (!fnd) { 6708 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6709 } 6710 /* 6711 * Question, should we go through the delivery queue? The 6712 * only reason things are on here is the app not reading OR 6713 * a p-d-api up. An attacker COULD send enough in to 6714 * initiate the PD-API and then send a bunch of stuff to 6715 * other streams... these would wind up on the delivery 6716 * queue.. and then we would not get to them. But in order 6717 * to do this I then have to back-track and un-deliver 6718 * sequence numbers in streams.. el-yucko. I think for now 6719 * we will NOT look at the delivery queue and leave it to be 6720 * something to consider later. An alternative would be to 6721 * abort the P-D-API with a notification and then deliver 6722 * the data.... Or another method might be to keep track of 6723 * how many times the situation occurs and if we see a 6724 * possible attack underway just abort the association. 6725 */ 6726 #ifdef SCTP_DEBUG 6727 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6728 #endif 6729 /* 6730 * Now do we need to find a new 6731 * asoc->highest_tsn_inside_map? 6732 */ 6733 asoc->last_revoke_count = cnt; 6734 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6735 /* sa_ignore NO_NULL_CHK */ 6736 sctp_send_sack(stcb); 6737 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6738 reneged_asoc_ids[reneged_at] = sctp_get_associd(stcb); 6739 reneged_at++; 6740 } 6741 /* 6742 * Another issue, in un-setting the TSN's in the mapping array we 6743 * DID NOT adjust the highest_tsn marker. This will cause one of 6744 * two things to occur. It may cause us to do extra work in checking 6745 * for our mapping array movement. More importantly it may cause us 6746 * to SACK every datagram. This may not be a bad thing though since 6747 * we will recover once we get our cum-ack above and all this stuff 6748 * we dumped recovered. 6749 */ 6750 } 6751 6752 void 6753 sctp_drain() 6754 { 6755 /* 6756 * We must walk the PCB lists for ALL associations here. The system 6757 * is LOW on MBUF's and needs help. This is where reneging will 6758 * occur. We really hope this does NOT happen! 6759 */ 6760 VNET_ITERATOR_DECL(vnet_iter); 6761 VNET_LIST_RLOCK_NOSLEEP(); 6762 VNET_FOREACH(vnet_iter) { 6763 CURVNET_SET(vnet_iter); 6764 struct sctp_inpcb *inp; 6765 struct sctp_tcb *stcb; 6766 6767 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6768 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6769 #ifdef VIMAGE 6770 continue; 6771 #else 6772 return; 6773 #endif 6774 } 6775 SCTP_INP_INFO_RLOCK(); 6776 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6777 /* For each endpoint */ 6778 SCTP_INP_RLOCK(inp); 6779 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6780 /* For each association */ 6781 SCTP_TCB_LOCK(stcb); 6782 sctp_drain_mbufs(inp, stcb); 6783 SCTP_TCB_UNLOCK(stcb); 6784 } 6785 SCTP_INP_RUNLOCK(inp); 6786 } 6787 SCTP_INP_INFO_RUNLOCK(); 6788 CURVNET_RESTORE(); 6789 } 6790 VNET_LIST_RUNLOCK_NOSLEEP(); 6791 } 6792 6793 /* 6794 * start a new iterator 6795 * iterates through all endpoints and associations based on the pcb_state 6796 * flags and asoc_state. "af" (mandatory) is executed for all matching 6797 * assocs and "ef" (optional) is executed when the iterator completes. 6798 * "inpf" (optional) is executed for each new endpoint as it is being 6799 * iterated through. inpe (optional) is called when the inp completes 6800 * its way through all the stcbs. 6801 */ 6802 int 6803 sctp_initiate_iterator(inp_func inpf, 6804 asoc_func af, 6805 inp_func inpe, 6806 uint32_t pcb_state, 6807 uint32_t pcb_features, 6808 uint32_t asoc_state, 6809 void *argp, 6810 uint32_t argi, 6811 end_func ef, 6812 struct sctp_inpcb *s_inp, 6813 uint8_t chunk_output_off) 6814 { 6815 struct sctp_iterator *it = NULL; 6816 6817 if (af == NULL) { 6818 return (-1); 6819 } 6820 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6821 SCTP_M_ITER); 6822 if (it == NULL) { 6823 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6824 return (ENOMEM); 6825 } 6826 memset(it, 0, sizeof(*it)); 6827 it->function_assoc = af; 6828 it->function_inp = inpf; 6829 if (inpf) 6830 it->done_current_ep = 0; 6831 else 6832 it->done_current_ep = 1; 6833 it->function_atend = ef; 6834 it->pointer = argp; 6835 it->val = argi; 6836 it->pcb_flags = pcb_state; 6837 it->pcb_features = pcb_features; 6838 it->asoc_state = asoc_state; 6839 it->function_inp_end = inpe; 6840 it->no_chunk_output = chunk_output_off; 6841 it->vn = curvnet; 6842 if (s_inp) { 6843 /* Assume lock is held here */ 6844 it->inp = s_inp; 6845 SCTP_INP_INCR_REF(it->inp); 6846 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6847 } else { 6848 SCTP_INP_INFO_RLOCK(); 6849 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6850 if (it->inp) { 6851 SCTP_INP_INCR_REF(it->inp); 6852 } 6853 SCTP_INP_INFO_RUNLOCK(); 6854 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6855 6856 } 6857 SCTP_IPI_ITERATOR_WQ_LOCK(); 6858 6859 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6860 if (sctp_it_ctl.iterator_running == 0) { 6861 sctp_wakeup_iterator(); 6862 } 6863 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6864 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6865 return (0); 6866 } 6867