Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/netinet/sctp_pcb.c
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1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_header.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_timer.h> 47 #include <netinet/sctp_bsd_addr.h> 48 #include <netinet/sctp_dtrace_define.h> 49 #if defined(INET) || defined(INET6) 50 #include <netinet/udp.h> 51 #endif 52 #ifdef INET6 53 #include <netinet6/ip6_var.h> 54 #endif 55 #include <sys/sched.h> 56 #include <sys/smp.h> 57 #include <sys/unistd.h> 58 59 60 VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62 /* FIX: we don't handle multiple link local scopes */ 63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64 #ifdef INET6 65 int 66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67 { 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return (0); 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return (0); 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79 } 80 81 #endif 82 83 void 84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85 { 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 SCTP_INP_INFO_RUNLOCK(); 100 } 101 102 /*- 103 * Addresses are added to VRF's (Virtual Router's). For BSD we 104 * have only the default VRF 0. We maintain a hash list of 105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 106 * these has a list of addresses. When we add a new address 107 * to a VRF we lookup the ifn/ifn_index, if the ifn does 108 * not exist we create it and add it to the list of IFN's 109 * within the VRF. Once we have the sctp_ifn, we add the 110 * address to the list. So we look something like: 111 * 112 * hash-vrf-table 113 * vrf-> ifn-> ifn -> ifn 114 * vrf | 115 * ... +--ifa-> ifa -> ifa 116 * vrf 117 * 118 * We keep these separate lists since the SCTP subsystem will 119 * point to these from its source address selection nets structure. 120 * When an address is deleted it does not happen right away on 121 * the SCTP side, it gets scheduled. What we do when a 122 * delete happens is immediately remove the address from 123 * the master list and decrement the refcount. As our 124 * addip iterator works through and frees the src address 125 * selection pointing to the sctp_ifa, eventually the refcount 126 * will reach 0 and we will delete it. Note that it is assumed 127 * that any locking on system level ifn/ifa is done at the 128 * caller of these functions and these routines will only 129 * lock the SCTP structures as they add or delete things. 130 * 131 * Other notes on VRF concepts. 132 * - An endpoint can be in multiple VRF's 133 * - An association lives within a VRF and only one VRF. 134 * - Any incoming packet we can deduce the VRF for by 135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 136 * - Any downward send call or connect call must supply the 137 * VRF via ancillary data or via some sort of set default 138 * VRF socket option call (again for BSD no brainer since 139 * the VRF is always 0). 140 * - An endpoint may add multiple VRF's to it. 141 * - Listening sockets can accept associations in any 142 * of the VRF's they are in but the assoc will end up 143 * in only one VRF (gotten from the packet or connect/send). 144 * 145 */ 146 147 struct sctp_vrf * 148 sctp_allocate_vrf(int vrf_id) 149 { 150 struct sctp_vrf *vrf = NULL; 151 struct sctp_vrflist *bucket; 152 153 /* First allocate the VRF structure */ 154 vrf = sctp_find_vrf(vrf_id); 155 if (vrf) { 156 /* Already allocated */ 157 return (vrf); 158 } 159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 160 SCTP_M_VRF); 161 if (vrf == NULL) { 162 /* No memory */ 163 #ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165 #endif 166 return (NULL); 167 } 168 /* setup the VRF */ 169 memset(vrf, 0, sizeof(struct sctp_vrf)); 170 vrf->vrf_id = vrf_id; 171 LIST_INIT(&vrf->ifnlist); 172 vrf->total_ifa_count = 0; 173 vrf->refcount = 0; 174 /* now also setup table ids */ 175 SCTP_INIT_VRF_TABLEID(vrf); 176 /* Init the HASH of addresses */ 177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 178 &vrf->vrf_addr_hashmark); 179 if (vrf->vrf_addr_hash == NULL) { 180 /* No memory */ 181 #ifdef INVARIANTS 182 panic("No memory for VRF:%d", vrf_id); 183 #endif 184 SCTP_FREE(vrf, SCTP_M_VRF); 185 return (NULL); 186 } 187 /* Add it to the hash table */ 188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 189 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 191 return (vrf); 192 } 193 194 195 struct sctp_ifn * 196 sctp_find_ifn(void *ifn, uint32_t ifn_index) 197 { 198 struct sctp_ifn *sctp_ifnp; 199 struct sctp_ifnlist *hash_ifn_head; 200 201 /* 202 * We assume the lock is held for the addresses if that's wrong 203 * problems could occur :-) 204 */ 205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 207 if (sctp_ifnp->ifn_index == ifn_index) { 208 return (sctp_ifnp); 209 } 210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 211 return (sctp_ifnp); 212 } 213 } 214 return (NULL); 215 } 216 217 218 struct sctp_vrf * 219 sctp_find_vrf(uint32_t vrf_id) 220 { 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231 } 232 233 234 void 235 sctp_free_vrf(struct sctp_vrf *vrf) 236 { 237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 238 if (vrf->vrf_addr_hash) { 239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 240 vrf->vrf_addr_hash = NULL; 241 } 242 /* We zero'd the count */ 243 LIST_REMOVE(vrf, next_vrf); 244 SCTP_FREE(vrf, SCTP_M_VRF); 245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 246 } 247 } 248 249 250 void 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252 { 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261 } 262 263 264 void 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 266 { 267 struct sctp_ifn *sctp_ifnp; 268 269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 270 if (sctp_ifnp != NULL) { 271 sctp_ifnp->ifn_mtu = mtu; 272 } 273 } 274 275 276 void 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 278 { 279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 280 /* We zero'd the count */ 281 if (sctp_ifap->ifn_p) { 282 sctp_free_ifn(sctp_ifap->ifn_p); 283 } 284 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 286 } 287 } 288 289 290 static void 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 292 { 293 struct sctp_ifn *found; 294 295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 296 if (found == NULL) { 297 /* Not in the list.. sorry */ 298 return; 299 } 300 if (hold_addr_lock == 0) 301 SCTP_IPI_ADDR_WLOCK(); 302 LIST_REMOVE(sctp_ifnp, next_bucket); 303 LIST_REMOVE(sctp_ifnp, next_ifn); 304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 305 sctp_ifnp->registered_af); 306 if (hold_addr_lock == 0) 307 SCTP_IPI_ADDR_WUNLOCK(); 308 /* Take away the reference, and possibly free it */ 309 sctp_free_ifn(sctp_ifnp); 310 } 311 312 313 void 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 315 const char *if_name, uint32_t ifn_index) 316 { 317 struct sctp_vrf *vrf; 318 struct sctp_ifa *sctp_ifap; 319 320 SCTP_IPI_ADDR_RLOCK(); 321 vrf = sctp_find_vrf(vrf_id); 322 if (vrf == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 324 goto out; 325 326 } 327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 328 if (sctp_ifap == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 330 goto out; 331 } 332 if (sctp_ifap->ifn_p == NULL) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 334 goto out; 335 } 336 if (if_name) { 337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 339 sctp_ifap->ifn_p->ifn_name, if_name); 340 goto out; 341 } 342 } else { 343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 345 sctp_ifap->ifn_p->ifn_index, ifn_index); 346 goto out; 347 } 348 } 349 350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 352 out: 353 SCTP_IPI_ADDR_RUNLOCK(); 354 } 355 356 357 void 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 359 const char *if_name, uint32_t ifn_index) 360 { 361 struct sctp_vrf *vrf; 362 struct sctp_ifa *sctp_ifap; 363 364 SCTP_IPI_ADDR_RLOCK(); 365 vrf = sctp_find_vrf(vrf_id); 366 if (vrf == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 368 goto out; 369 370 } 371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 372 if (sctp_ifap == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 374 goto out; 375 } 376 if (sctp_ifap->ifn_p == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 378 goto out; 379 } 380 if (if_name) { 381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 383 sctp_ifap->ifn_p->ifn_name, if_name); 384 goto out; 385 } 386 } else { 387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 389 sctp_ifap->ifn_p->ifn_index, ifn_index); 390 goto out; 391 } 392 } 393 394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 396 out: 397 SCTP_IPI_ADDR_RUNLOCK(); 398 } 399 400 401 /*- 402 * Add an ifa to an ifn. 403 * Register the interface as necessary. 404 * NOTE: ADDR write lock MUST be held. 405 */ 406 static void 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 408 { 409 int ifa_af; 410 411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 412 sctp_ifap->ifn_p = sctp_ifnp; 413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 414 /* update address counts */ 415 sctp_ifnp->ifa_count++; 416 ifa_af = sctp_ifap->address.sa.sa_family; 417 switch (ifa_af) { 418 #ifdef INET 419 case AF_INET: 420 sctp_ifnp->num_v4++; 421 break; 422 #endif 423 #ifdef INET6 424 case AF_INET6: 425 sctp_ifnp->num_v6++; 426 break; 427 #endif 428 default: 429 break; 430 } 431 if (sctp_ifnp->ifa_count == 1) { 432 /* register the new interface */ 433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 434 sctp_ifnp->registered_af = ifa_af; 435 } 436 } 437 438 439 /*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445 static void 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447 { 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453 #ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457 #endif 458 #ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462 #endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 476 sctp_ifap->ifn_p->registered_af = AF_INET; 477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 478 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 481 sctp_ifap->ifn_p->registered_af = AF_INET6; 482 } 483 /* free the ifn refcount */ 484 sctp_free_ifn(sctp_ifap->ifn_p); 485 } 486 sctp_ifap->ifn_p = NULL; 487 } 488 } 489 490 491 struct sctp_ifa * 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 493 uint32_t ifn_type, const char *if_name, void *ifa, 494 struct sockaddr *addr, uint32_t ifa_flags, 495 int dynamic_add) 496 { 497 struct sctp_vrf *vrf; 498 struct sctp_ifn *sctp_ifnp = NULL; 499 struct sctp_ifa *sctp_ifap = NULL; 500 struct sctp_ifalist *hash_addr_head; 501 struct sctp_ifnlist *hash_ifn_head; 502 uint32_t hash_of_addr; 503 int new_ifn_af = 0; 504 505 #ifdef SCTP_DEBUG 506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 508 #endif 509 SCTP_IPI_ADDR_WLOCK(); 510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 511 if (sctp_ifnp) { 512 vrf = sctp_ifnp->vrf; 513 } else { 514 vrf = sctp_find_vrf(vrf_id); 515 if (vrf == NULL) { 516 vrf = sctp_allocate_vrf(vrf_id); 517 if (vrf == NULL) { 518 SCTP_IPI_ADDR_WUNLOCK(); 519 return (NULL); 520 } 521 } 522 } 523 if (sctp_ifnp == NULL) { 524 /* 525 * build one and add it, can't hold lock until after malloc 526 * done though. 527 */ 528 SCTP_IPI_ADDR_WUNLOCK(); 529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 530 sizeof(struct sctp_ifn), SCTP_M_IFN); 531 if (sctp_ifnp == NULL) { 532 #ifdef INVARIANTS 533 panic("No memory for IFN"); 534 #endif 535 return (NULL); 536 } 537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 538 sctp_ifnp->ifn_index = ifn_index; 539 sctp_ifnp->ifn_p = ifn; 540 sctp_ifnp->ifn_type = ifn_type; 541 sctp_ifnp->refcount = 0; 542 sctp_ifnp->vrf = vrf; 543 atomic_add_int(&vrf->refcount, 1); 544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 545 if (if_name != NULL) { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 547 } else { 548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 549 } 550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 551 LIST_INIT(&sctp_ifnp->ifalist); 552 SCTP_IPI_ADDR_WLOCK(); 553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 556 new_ifn_af = 1; 557 } 558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 559 if (sctp_ifap) { 560 /* Hmm, it already exists? */ 561 if ((sctp_ifap->ifn_p) && 562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 564 sctp_ifap->ifn_p->ifn_name, ifn_index, 565 (void *)sctp_ifap); 566 if (new_ifn_af) { 567 /* Remove the created one that we don't want */ 568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 569 } 570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 571 /* easy to solve, just switch back to active */ 572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 574 sctp_ifap->ifn_p = sctp_ifnp; 575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 576 } 577 exit_stage_left: 578 SCTP_IPI_ADDR_WUNLOCK(); 579 return (sctp_ifap); 580 } else { 581 if (sctp_ifap->ifn_p) { 582 /* 583 * The last IFN gets the address, remove the 584 * old one 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 588 sctp_ifap->ifn_p->ifn_index, if_name, 589 ifn_index); 590 /* remove the address from the old ifn */ 591 sctp_remove_ifa_from_ifn(sctp_ifap); 592 /* move the address over to the new ifn */ 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 goto exit_stage_left; 595 } else { 596 /* repair ifnp which was NULL ? */ 597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 599 (void *)sctp_ifnp, (void *)sctp_ifap); 600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 601 } 602 goto exit_stage_left; 603 } 604 } 605 SCTP_IPI_ADDR_WUNLOCK(); 606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 607 if (sctp_ifap == NULL) { 608 #ifdef INVARIANTS 609 panic("No memory for IFA"); 610 #endif 611 return (NULL); 612 } 613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 614 sctp_ifap->ifn_p = sctp_ifnp; 615 atomic_add_int(&sctp_ifnp->refcount, 1); 616 sctp_ifap->vrf_id = vrf_id; 617 sctp_ifap->ifa = ifa; 618 memcpy(&sctp_ifap->address, addr, addr->sa_len); 619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 620 sctp_ifap->flags = ifa_flags; 621 /* Set scope */ 622 switch (sctp_ifap->address.sa.sa_family) { 623 #ifdef INET 624 case AF_INET: 625 { 626 struct sockaddr_in *sin; 627 628 sin = &sctp_ifap->address.sin; 629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 631 sctp_ifap->src_is_loop = 1; 632 } 633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 634 sctp_ifap->src_is_priv = 1; 635 } 636 sctp_ifnp->num_v4++; 637 if (new_ifn_af) 638 new_ifn_af = AF_INET; 639 break; 640 } 641 #endif 642 #ifdef INET6 643 case AF_INET6: 644 { 645 /* ok to use deprecated addresses? */ 646 struct sockaddr_in6 *sin6; 647 648 sin6 = &sctp_ifap->address.sin6; 649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 651 sctp_ifap->src_is_loop = 1; 652 } 653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 654 sctp_ifap->src_is_priv = 1; 655 } 656 sctp_ifnp->num_v6++; 657 if (new_ifn_af) 658 new_ifn_af = AF_INET6; 659 break; 660 } 661 #endif 662 default: 663 new_ifn_af = 0; 664 break; 665 } 666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 667 668 if ((sctp_ifap->src_is_priv == 0) && 669 (sctp_ifap->src_is_loop == 0)) { 670 sctp_ifap->src_is_glob = 1; 671 } 672 SCTP_IPI_ADDR_WLOCK(); 673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 675 sctp_ifap->refcount = 1; 676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 677 sctp_ifnp->ifa_count++; 678 vrf->total_ifa_count++; 679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 680 if (new_ifn_af) { 681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 682 sctp_ifnp->registered_af = new_ifn_af; 683 } 684 SCTP_IPI_ADDR_WUNLOCK(); 685 if (dynamic_add) { 686 /* 687 * Bump up the refcount so that when the timer completes it 688 * will drop back down. 689 */ 690 struct sctp_laddr *wi; 691 692 atomic_add_int(&sctp_ifap->refcount, 1); 693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 694 if (wi == NULL) { 695 /* 696 * Gak, what can we do? We have lost an address 697 * change can you say HOSED? 698 */ 699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 700 /* Opps, must decrement the count */ 701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 702 if_name); 703 return (NULL); 704 } 705 SCTP_INCR_LADDR_COUNT(); 706 bzero(wi, sizeof(*wi)); 707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 708 wi->ifa = sctp_ifap; 709 wi->action = SCTP_ADD_IP_ADDRESS; 710 711 SCTP_WQ_ADDR_LOCK(); 712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 713 SCTP_WQ_ADDR_UNLOCK(); 714 715 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 716 (struct sctp_inpcb *)NULL, 717 (struct sctp_tcb *)NULL, 718 (struct sctp_nets *)NULL); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724 } 725 726 void 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729 { 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739 #ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742 #endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. We do this especially for 752 * panda who might recycle indexes fast. 753 */ 754 if (if_name) { 755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 756 /* They match its a correct delete */ 757 valid = 1; 758 } 759 } 760 if (!valid) { 761 /* last ditch check ifn_index */ 762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 763 valid = 1; 764 } 765 } 766 if (!valid) { 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 768 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 771 SCTP_IPI_ADDR_WUNLOCK(); 772 return; 773 } 774 } 775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 777 /* 778 * We don't set the flag. This means that the structure will 779 * hang around in EP's that have bound specific to it until 780 * they close. This gives us TCP like behavior if someone 781 * removes an address (or for that matter adds it right 782 * back). 783 */ 784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 785 vrf->total_ifa_count--; 786 LIST_REMOVE(sctp_ifap, next_bucket); 787 sctp_remove_ifa_from_ifn(sctp_ifap); 788 } 789 #ifdef SCTP_DEBUG 790 else { 791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 792 ifn_index); 793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 794 } 795 #endif 796 797 out_now: 798 SCTP_IPI_ADDR_WUNLOCK(); 799 if (sctp_ifap) { 800 struct sctp_laddr *wi; 801 802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 803 if (wi == NULL) { 804 /* 805 * Gak, what can we do? We have lost an address 806 * change can you say HOSED? 807 */ 808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 809 810 /* Oops, must decrement the count */ 811 sctp_free_ifa(sctp_ifap); 812 return; 813 } 814 SCTP_INCR_LADDR_COUNT(); 815 bzero(wi, sizeof(*wi)); 816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 817 wi->ifa = sctp_ifap; 818 wi->action = SCTP_DEL_IP_ADDRESS; 819 SCTP_WQ_ADDR_LOCK(); 820 /* 821 * Should this really be a tailq? As it is we will process 822 * the newest first :-0 823 */ 824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 825 SCTP_WQ_ADDR_UNLOCK(); 826 827 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 828 (struct sctp_inpcb *)NULL, 829 (struct sctp_tcb *)NULL, 830 (struct sctp_nets *)NULL); 831 } 832 return; 833 } 834 835 836 static int 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 838 { 839 int loopback_scope; 840 841 #if defined(INET) 842 int ipv4_local_scope, ipv4_addr_legal; 843 844 #endif 845 #if defined(INET6) 846 int local_scope, site_scope, ipv6_addr_legal; 847 848 #endif 849 struct sctp_vrf *vrf; 850 struct sctp_ifn *sctp_ifn; 851 struct sctp_ifa *sctp_ifa; 852 853 loopback_scope = stcb->asoc.scope.loopback_scope; 854 #if defined(INET) 855 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 856 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 857 #endif 858 #if defined(INET6) 859 local_scope = stcb->asoc.scope.local_scope; 860 site_scope = stcb->asoc.scope.site_scope; 861 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 862 #endif 863 864 SCTP_IPI_ADDR_RLOCK(); 865 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 866 if (vrf == NULL) { 867 /* no vrf, no addresses */ 868 SCTP_IPI_ADDR_RUNLOCK(); 869 return (0); 870 } 871 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 872 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 873 if ((loopback_scope == 0) && 874 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 875 continue; 876 } 877 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 878 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 879 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 880 /* 881 * We allow pending addresses, where 882 * we have sent an asconf-add to be 883 * considered valid. 884 */ 885 continue; 886 } 887 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 888 continue; 889 } 890 switch (sctp_ifa->address.sa.sa_family) { 891 #ifdef INET 892 case AF_INET: 893 if (ipv4_addr_legal) { 894 struct sockaddr_in *sin, 895 *rsin; 896 897 sin = &sctp_ifa->address.sin; 898 rsin = (struct sockaddr_in *)to; 899 if ((ipv4_local_scope == 0) && 900 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 901 continue; 902 } 903 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 904 &sin->sin_addr) != 0) { 905 continue; 906 } 907 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 908 SCTP_IPI_ADDR_RUNLOCK(); 909 return (1); 910 } 911 } 912 break; 913 #endif 914 #ifdef INET6 915 case AF_INET6: 916 if (ipv6_addr_legal) { 917 struct sockaddr_in6 *sin6, 918 *rsin6; 919 920 sin6 = &sctp_ifa->address.sin6; 921 rsin6 = (struct sockaddr_in6 *)to; 922 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 923 &sin6->sin6_addr) != 0) { 924 continue; 925 } 926 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 927 if (local_scope == 0) 928 continue; 929 if (sin6->sin6_scope_id == 0) { 930 if (sa6_recoverscope(sin6) != 0) 931 continue; 932 } 933 } 934 if ((site_scope == 0) && 935 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 936 continue; 937 } 938 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 939 SCTP_IPI_ADDR_RUNLOCK(); 940 return (1); 941 } 942 } 943 break; 944 #endif 945 default: 946 /* TSNH */ 947 break; 948 } 949 } 950 } 951 } else { 952 struct sctp_laddr *laddr; 953 954 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 955 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 956 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 957 continue; 958 } 959 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 960 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 961 /* 962 * We allow pending addresses, where we have 963 * sent an asconf-add to be considered 964 * valid. 965 */ 966 continue; 967 } 968 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 969 continue; 970 } 971 switch (to->sa_family) { 972 #ifdef INET 973 case AF_INET: 974 { 975 struct sockaddr_in *sin, *rsin; 976 977 sin = &laddr->ifa->address.sin; 978 rsin = (struct sockaddr_in *)to; 979 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 980 SCTP_IPI_ADDR_RUNLOCK(); 981 return (1); 982 } 983 break; 984 } 985 #endif 986 #ifdef INET6 987 case AF_INET6: 988 { 989 struct sockaddr_in6 *sin6, *rsin6; 990 991 sin6 = &laddr->ifa->address.sin6; 992 rsin6 = (struct sockaddr_in6 *)to; 993 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (1); 996 } 997 break; 998 } 999 1000 #endif 1001 default: 1002 /* TSNH */ 1003 break; 1004 } 1005 1006 } 1007 } 1008 SCTP_IPI_ADDR_RUNLOCK(); 1009 return (0); 1010 } 1011 1012 1013 static struct sctp_tcb * 1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1015 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1016 { 1017 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1018 /* 1019 * If we support the TCP model, then we must now dig through to see 1020 * if we can find our endpoint in the list of tcp ep's. 1021 */ 1022 uint16_t lport, rport; 1023 struct sctppcbhead *ephead; 1024 struct sctp_inpcb *inp; 1025 struct sctp_laddr *laddr; 1026 struct sctp_tcb *stcb; 1027 struct sctp_nets *net; 1028 1029 if ((to == NULL) || (from == NULL)) { 1030 return (NULL); 1031 } 1032 switch (to->sa_family) { 1033 #ifdef INET 1034 case AF_INET: 1035 if (from->sa_family == AF_INET) { 1036 lport = ((struct sockaddr_in *)to)->sin_port; 1037 rport = ((struct sockaddr_in *)from)->sin_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042 #endif 1043 #ifdef INET6 1044 case AF_INET6: 1045 if (from->sa_family == AF_INET6) { 1046 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1047 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1048 } else { 1049 return (NULL); 1050 } 1051 break; 1052 #endif 1053 default: 1054 return (NULL); 1055 } 1056 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1057 /* 1058 * Ok now for each of the guys in this bucket we must look and see: 1059 * - Does the remote port match. - Does there single association's 1060 * addresses match this address (to). If so we update p_ep to point 1061 * to this ep and return the tcb from it. 1062 */ 1063 LIST_FOREACH(inp, ephead, sctp_hash) { 1064 SCTP_INP_RLOCK(inp); 1065 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 if (lport != inp->sctp_lport) { 1070 SCTP_INP_RUNLOCK(inp); 1071 continue; 1072 } 1073 switch (to->sa_family) { 1074 #ifdef INET 1075 case AF_INET: 1076 { 1077 struct sockaddr_in *sin; 1078 1079 sin = (struct sockaddr_in *)to; 1080 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1081 &sin->sin_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087 #endif 1088 #ifdef INET6 1089 case AF_INET6: 1090 { 1091 struct sockaddr_in6 *sin6; 1092 1093 sin6 = (struct sockaddr_in6 *)to; 1094 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1095 &sin6->sin6_addr) != 0) { 1096 SCTP_INP_RUNLOCK(inp); 1097 continue; 1098 } 1099 break; 1100 } 1101 #endif 1102 default: 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 if (inp->def_vrf_id != vrf_id) { 1107 SCTP_INP_RUNLOCK(inp); 1108 continue; 1109 } 1110 /* check to see if the ep has one of the addresses */ 1111 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1112 /* We are NOT bound all, so look further */ 1113 int match = 0; 1114 1115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1116 1117 if (laddr->ifa == NULL) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __func__); 1119 continue; 1120 } 1121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1122 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1123 continue; 1124 } 1125 if (laddr->ifa->address.sa.sa_family == 1126 to->sa_family) { 1127 /* see if it matches */ 1128 #ifdef INET 1129 if (from->sa_family == AF_INET) { 1130 struct sockaddr_in *intf_addr, 1131 *sin; 1132 1133 intf_addr = &laddr->ifa->address.sin; 1134 sin = (struct sockaddr_in *)to; 1135 if (sin->sin_addr.s_addr == 1136 intf_addr->sin_addr.s_addr) { 1137 match = 1; 1138 break; 1139 } 1140 } 1141 #endif 1142 #ifdef INET6 1143 if (from->sa_family == AF_INET6) { 1144 struct sockaddr_in6 *intf_addr6; 1145 struct sockaddr_in6 *sin6; 1146 1147 sin6 = (struct sockaddr_in6 *) 1148 to; 1149 intf_addr6 = &laddr->ifa->address.sin6; 1150 1151 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1152 intf_addr6)) { 1153 match = 1; 1154 break; 1155 } 1156 } 1157 #endif 1158 } 1159 } 1160 if (match == 0) { 1161 /* This endpoint does not have this address */ 1162 SCTP_INP_RUNLOCK(inp); 1163 continue; 1164 } 1165 } 1166 /* 1167 * Ok if we hit here the ep has the address, does it hold 1168 * the tcb? 1169 */ 1170 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1171 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1172 if (stcb == NULL) { 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 SCTP_TCB_LOCK(stcb); 1177 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1178 SCTP_TCB_UNLOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 continue; 1181 } 1182 if (stcb->rport != rport) { 1183 /* remote port does not match. */ 1184 SCTP_TCB_UNLOCK(stcb); 1185 SCTP_INP_RUNLOCK(inp); 1186 continue; 1187 } 1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1189 SCTP_TCB_UNLOCK(stcb); 1190 SCTP_INP_RUNLOCK(inp); 1191 continue; 1192 } 1193 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 continue; 1197 } 1198 /* Does this TCB have a matching address? */ 1199 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1200 1201 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1202 /* not the same family, can't be a match */ 1203 continue; 1204 } 1205 switch (from->sa_family) { 1206 #ifdef INET 1207 case AF_INET: 1208 { 1209 struct sockaddr_in *sin, *rsin; 1210 1211 sin = (struct sockaddr_in *)&net->ro._l_addr; 1212 rsin = (struct sockaddr_in *)from; 1213 if (sin->sin_addr.s_addr == 1214 rsin->sin_addr.s_addr) { 1215 /* found it */ 1216 if (netp != NULL) { 1217 *netp = net; 1218 } 1219 /* 1220 * Update the endpoint 1221 * pointer 1222 */ 1223 *inp_p = inp; 1224 SCTP_INP_RUNLOCK(inp); 1225 return (stcb); 1226 } 1227 break; 1228 } 1229 #endif 1230 #ifdef INET6 1231 case AF_INET6: 1232 { 1233 struct sockaddr_in6 *sin6, *rsin6; 1234 1235 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1236 rsin6 = (struct sockaddr_in6 *)from; 1237 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1238 rsin6)) { 1239 /* found it */ 1240 if (netp != NULL) { 1241 *netp = net; 1242 } 1243 /* 1244 * Update the endpoint 1245 * pointer 1246 */ 1247 *inp_p = inp; 1248 SCTP_INP_RUNLOCK(inp); 1249 return (stcb); 1250 } 1251 break; 1252 } 1253 #endif 1254 default: 1255 /* TSNH */ 1256 break; 1257 } 1258 } 1259 SCTP_TCB_UNLOCK(stcb); 1260 SCTP_INP_RUNLOCK(inp); 1261 } 1262 return (NULL); 1263 } 1264 1265 1266 /* 1267 * rules for use 1268 * 1269 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1270 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1271 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1272 * NULL. 1273 */ 1274 1275 struct sctp_tcb * 1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1277 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1278 { 1279 struct sctpasochead *head; 1280 struct sctp_inpcb *inp; 1281 struct sctp_tcb *stcb = NULL; 1282 struct sctp_nets *net; 1283 uint16_t rport; 1284 1285 inp = *inp_p; 1286 switch (remote->sa_family) { 1287 #ifdef INET 1288 case AF_INET: 1289 rport = (((struct sockaddr_in *)remote)->sin_port); 1290 break; 1291 #endif 1292 #ifdef INET6 1293 case AF_INET6: 1294 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1295 break; 1296 #endif 1297 default: 1298 return (NULL); 1299 } 1300 if (locked_tcb) { 1301 /* 1302 * UN-lock so we can do proper locking here this occurs when 1303 * called from load_addresses_from_init. 1304 */ 1305 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1306 SCTP_TCB_UNLOCK(locked_tcb); 1307 } 1308 SCTP_INP_INFO_RLOCK(); 1309 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1310 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1311 /*- 1312 * Now either this guy is our listener or it's the 1313 * connector. If it is the one that issued the connect, then 1314 * it's only chance is to be the first TCB in the list. If 1315 * it is the acceptor, then do the special_lookup to hash 1316 * and find the real inp. 1317 */ 1318 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1319 /* to is peer addr, from is my addr */ 1320 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1321 netp, inp->def_vrf_id); 1322 if ((stcb != NULL) && (locked_tcb == NULL)) { 1323 /* we have a locked tcb, lower refcount */ 1324 SCTP_INP_DECR_REF(inp); 1325 } 1326 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1327 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1328 SCTP_TCB_LOCK(locked_tcb); 1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1330 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1331 } 1332 SCTP_INP_INFO_RUNLOCK(); 1333 return (stcb); 1334 } else { 1335 SCTP_INP_WLOCK(inp); 1336 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1337 goto null_return; 1338 } 1339 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1340 if (stcb == NULL) { 1341 goto null_return; 1342 } 1343 SCTP_TCB_LOCK(stcb); 1344 1345 if (stcb->rport != rport) { 1346 /* remote port does not match. */ 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1355 SCTP_TCB_UNLOCK(stcb); 1356 goto null_return; 1357 } 1358 /* now look at the list of remote addresses */ 1359 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1360 #ifdef INVARIANTS 1361 if (net == (TAILQ_NEXT(net, sctp_next))) { 1362 panic("Corrupt net list"); 1363 } 1364 #endif 1365 if (net->ro._l_addr.sa.sa_family != 1366 remote->sa_family) { 1367 /* not the same family */ 1368 continue; 1369 } 1370 switch (remote->sa_family) { 1371 #ifdef INET 1372 case AF_INET: 1373 { 1374 struct sockaddr_in *sin, 1375 *rsin; 1376 1377 sin = (struct sockaddr_in *) 1378 &net->ro._l_addr; 1379 rsin = (struct sockaddr_in *)remote; 1380 if (sin->sin_addr.s_addr == 1381 rsin->sin_addr.s_addr) { 1382 /* found it */ 1383 if (netp != NULL) { 1384 *netp = net; 1385 } 1386 if (locked_tcb == NULL) { 1387 SCTP_INP_DECR_REF(inp); 1388 } else if (locked_tcb != stcb) { 1389 SCTP_TCB_LOCK(locked_tcb); 1390 } 1391 if (locked_tcb) { 1392 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1393 } 1394 SCTP_INP_WUNLOCK(inp); 1395 SCTP_INP_INFO_RUNLOCK(); 1396 return (stcb); 1397 } 1398 break; 1399 } 1400 #endif 1401 #ifdef INET6 1402 case AF_INET6: 1403 { 1404 struct sockaddr_in6 *sin6, 1405 *rsin6; 1406 1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1408 rsin6 = (struct sockaddr_in6 *)remote; 1409 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1410 rsin6)) { 1411 /* found it */ 1412 if (netp != NULL) { 1413 *netp = net; 1414 } 1415 if (locked_tcb == NULL) { 1416 SCTP_INP_DECR_REF(inp); 1417 } else if (locked_tcb != stcb) { 1418 SCTP_TCB_LOCK(locked_tcb); 1419 } 1420 if (locked_tcb) { 1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1422 } 1423 SCTP_INP_WUNLOCK(inp); 1424 SCTP_INP_INFO_RUNLOCK(); 1425 return (stcb); 1426 } 1427 break; 1428 } 1429 #endif 1430 default: 1431 /* TSNH */ 1432 break; 1433 } 1434 } 1435 SCTP_TCB_UNLOCK(stcb); 1436 } 1437 } else { 1438 SCTP_INP_WLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 goto null_return; 1441 } 1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1443 inp->sctp_hashmark)]; 1444 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1445 if (stcb->rport != rport) { 1446 /* remote port does not match */ 1447 continue; 1448 } 1449 SCTP_TCB_LOCK(stcb); 1450 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1451 SCTP_TCB_UNLOCK(stcb); 1452 continue; 1453 } 1454 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1455 SCTP_TCB_UNLOCK(stcb); 1456 continue; 1457 } 1458 /* now look at the list of remote addresses */ 1459 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1460 #ifdef INVARIANTS 1461 if (net == (TAILQ_NEXT(net, sctp_next))) { 1462 panic("Corrupt net list"); 1463 } 1464 #endif 1465 if (net->ro._l_addr.sa.sa_family != 1466 remote->sa_family) { 1467 /* not the same family */ 1468 continue; 1469 } 1470 switch (remote->sa_family) { 1471 #ifdef INET 1472 case AF_INET: 1473 { 1474 struct sockaddr_in *sin, 1475 *rsin; 1476 1477 sin = (struct sockaddr_in *) 1478 &net->ro._l_addr; 1479 rsin = (struct sockaddr_in *)remote; 1480 if (sin->sin_addr.s_addr == 1481 rsin->sin_addr.s_addr) { 1482 /* found it */ 1483 if (netp != NULL) { 1484 *netp = net; 1485 } 1486 if (locked_tcb == NULL) { 1487 SCTP_INP_DECR_REF(inp); 1488 } else if (locked_tcb != stcb) { 1489 SCTP_TCB_LOCK(locked_tcb); 1490 } 1491 if (locked_tcb) { 1492 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1493 } 1494 SCTP_INP_WUNLOCK(inp); 1495 SCTP_INP_INFO_RUNLOCK(); 1496 return (stcb); 1497 } 1498 break; 1499 } 1500 #endif 1501 #ifdef INET6 1502 case AF_INET6: 1503 { 1504 struct sockaddr_in6 *sin6, 1505 *rsin6; 1506 1507 sin6 = (struct sockaddr_in6 *) 1508 &net->ro._l_addr; 1509 rsin6 = (struct sockaddr_in6 *)remote; 1510 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1511 rsin6)) { 1512 /* found it */ 1513 if (netp != NULL) { 1514 *netp = net; 1515 } 1516 if (locked_tcb == NULL) { 1517 SCTP_INP_DECR_REF(inp); 1518 } else if (locked_tcb != stcb) { 1519 SCTP_TCB_LOCK(locked_tcb); 1520 } 1521 if (locked_tcb) { 1522 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1523 } 1524 SCTP_INP_WUNLOCK(inp); 1525 SCTP_INP_INFO_RUNLOCK(); 1526 return (stcb); 1527 } 1528 break; 1529 } 1530 #endif 1531 default: 1532 /* TSNH */ 1533 break; 1534 } 1535 } 1536 SCTP_TCB_UNLOCK(stcb); 1537 } 1538 } 1539 null_return: 1540 /* clean up for returning null */ 1541 if (locked_tcb) { 1542 SCTP_TCB_LOCK(locked_tcb); 1543 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1544 } 1545 SCTP_INP_WUNLOCK(inp); 1546 SCTP_INP_INFO_RUNLOCK(); 1547 /* not found */ 1548 return (NULL); 1549 } 1550 1551 1552 /* 1553 * Find an association for a specific endpoint using the association id given 1554 * out in the COMM_UP notification 1555 */ 1556 struct sctp_tcb * 1557 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1558 { 1559 /* 1560 * Use my the assoc_id to find a endpoint 1561 */ 1562 struct sctpasochead *head; 1563 struct sctp_tcb *stcb; 1564 uint32_t id; 1565 1566 if (inp == NULL) { 1567 SCTP_PRINTF("TSNH ep_associd\n"); 1568 return (NULL); 1569 } 1570 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1571 SCTP_PRINTF("TSNH ep_associd0\n"); 1572 return (NULL); 1573 } 1574 id = (uint32_t) asoc_id; 1575 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1576 if (head == NULL) { 1577 /* invalid id TSNH */ 1578 SCTP_PRINTF("TSNH ep_associd1\n"); 1579 return (NULL); 1580 } 1581 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1582 if (stcb->asoc.assoc_id == id) { 1583 if (inp != stcb->sctp_ep) { 1584 /* 1585 * some other guy has the same id active (id 1586 * collision ??). 1587 */ 1588 SCTP_PRINTF("TSNH ep_associd2\n"); 1589 continue; 1590 } 1591 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1592 continue; 1593 } 1594 if (want_lock) { 1595 SCTP_TCB_LOCK(stcb); 1596 } 1597 return (stcb); 1598 } 1599 } 1600 return (NULL); 1601 } 1602 1603 1604 struct sctp_tcb * 1605 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1606 { 1607 struct sctp_tcb *stcb; 1608 1609 SCTP_INP_RLOCK(inp); 1610 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1611 SCTP_INP_RUNLOCK(inp); 1612 return (stcb); 1613 } 1614 1615 1616 /* 1617 * Endpoint probe expects that the INP_INFO is locked. 1618 */ 1619 static struct sctp_inpcb * 1620 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1621 uint16_t lport, uint32_t vrf_id) 1622 { 1623 struct sctp_inpcb *inp; 1624 struct sctp_laddr *laddr; 1625 1626 #ifdef INET 1627 struct sockaddr_in *sin; 1628 1629 #endif 1630 #ifdef INET6 1631 struct sockaddr_in6 *sin6; 1632 struct sockaddr_in6 *intf_addr6; 1633 1634 #endif 1635 int fnd; 1636 1637 #ifdef INET 1638 sin = NULL; 1639 #endif 1640 #ifdef INET6 1641 sin6 = NULL; 1642 #endif 1643 switch (nam->sa_family) { 1644 #ifdef INET 1645 case AF_INET: 1646 sin = (struct sockaddr_in *)nam; 1647 break; 1648 #endif 1649 #ifdef INET6 1650 case AF_INET6: 1651 sin6 = (struct sockaddr_in6 *)nam; 1652 break; 1653 #endif 1654 default: 1655 /* unsupported family */ 1656 return (NULL); 1657 } 1658 1659 if (head == NULL) 1660 return (NULL); 1661 1662 LIST_FOREACH(inp, head, sctp_hash) { 1663 SCTP_INP_RLOCK(inp); 1664 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1665 SCTP_INP_RUNLOCK(inp); 1666 continue; 1667 } 1668 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1669 (inp->sctp_lport == lport)) { 1670 /* got it */ 1671 switch (nam->sa_family) { 1672 #ifdef INET 1673 case AF_INET: 1674 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1675 SCTP_IPV6_V6ONLY(inp)) { 1676 /* 1677 * IPv4 on a IPv6 socket with ONLY 1678 * IPv6 set 1679 */ 1680 SCTP_INP_RUNLOCK(inp); 1681 continue; 1682 } 1683 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1684 &sin->sin_addr) != 0) { 1685 SCTP_INP_RUNLOCK(inp); 1686 continue; 1687 } 1688 break; 1689 #endif 1690 #ifdef INET6 1691 case AF_INET6: 1692 /* 1693 * A V6 address and the endpoint is NOT 1694 * bound V6 1695 */ 1696 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1697 SCTP_INP_RUNLOCK(inp); 1698 continue; 1699 } 1700 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1701 &sin6->sin6_addr) != 0) { 1702 SCTP_INP_RUNLOCK(inp); 1703 continue; 1704 } 1705 break; 1706 #endif 1707 default: 1708 break; 1709 } 1710 /* does a VRF id match? */ 1711 fnd = 0; 1712 if (inp->def_vrf_id == vrf_id) 1713 fnd = 1; 1714 1715 SCTP_INP_RUNLOCK(inp); 1716 if (!fnd) 1717 continue; 1718 return (inp); 1719 } 1720 SCTP_INP_RUNLOCK(inp); 1721 } 1722 switch (nam->sa_family) { 1723 #ifdef INET 1724 case AF_INET: 1725 if (sin->sin_addr.s_addr == INADDR_ANY) { 1726 /* Can't hunt for one that has no address specified */ 1727 return (NULL); 1728 } 1729 break; 1730 #endif 1731 #ifdef INET6 1732 case AF_INET6: 1733 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1734 /* Can't hunt for one that has no address specified */ 1735 return (NULL); 1736 } 1737 break; 1738 #endif 1739 default: 1740 break; 1741 } 1742 /* 1743 * ok, not bound to all so see if we can find a EP bound to this 1744 * address. 1745 */ 1746 LIST_FOREACH(inp, head, sctp_hash) { 1747 SCTP_INP_RLOCK(inp); 1748 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1749 SCTP_INP_RUNLOCK(inp); 1750 continue; 1751 } 1752 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1753 SCTP_INP_RUNLOCK(inp); 1754 continue; 1755 } 1756 /* 1757 * Ok this could be a likely candidate, look at all of its 1758 * addresses 1759 */ 1760 if (inp->sctp_lport != lport) { 1761 SCTP_INP_RUNLOCK(inp); 1762 continue; 1763 } 1764 /* does a VRF id match? */ 1765 fnd = 0; 1766 if (inp->def_vrf_id == vrf_id) 1767 fnd = 1; 1768 1769 if (!fnd) { 1770 SCTP_INP_RUNLOCK(inp); 1771 continue; 1772 } 1773 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1774 if (laddr->ifa == NULL) { 1775 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1776 __func__); 1777 continue; 1778 } 1779 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1780 (void *)laddr->ifa); 1781 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1783 continue; 1784 } 1785 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1786 /* possible, see if it matches */ 1787 switch (nam->sa_family) { 1788 #ifdef INET 1789 case AF_INET: 1790 if (sin->sin_addr.s_addr == 1791 laddr->ifa->address.sin.sin_addr.s_addr) { 1792 SCTP_INP_RUNLOCK(inp); 1793 return (inp); 1794 } 1795 break; 1796 #endif 1797 #ifdef INET6 1798 case AF_INET6: 1799 intf_addr6 = &laddr->ifa->address.sin6; 1800 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1801 intf_addr6)) { 1802 SCTP_INP_RUNLOCK(inp); 1803 return (inp); 1804 } 1805 break; 1806 #endif 1807 } 1808 } 1809 } 1810 SCTP_INP_RUNLOCK(inp); 1811 } 1812 return (NULL); 1813 } 1814 1815 1816 static struct sctp_inpcb * 1817 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1818 { 1819 struct sctppcbhead *head; 1820 struct sctp_inpcb *t_inp; 1821 int fnd; 1822 1823 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1824 SCTP_BASE_INFO(hashmark))]; 1825 LIST_FOREACH(t_inp, head, sctp_hash) { 1826 if (t_inp->sctp_lport != lport) { 1827 continue; 1828 } 1829 /* is it in the VRF in question */ 1830 fnd = 0; 1831 if (t_inp->def_vrf_id == vrf_id) 1832 fnd = 1; 1833 if (!fnd) 1834 continue; 1835 1836 /* This one is in use. */ 1837 /* check the v6/v4 binding issue */ 1838 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1839 SCTP_IPV6_V6ONLY(t_inp)) { 1840 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1841 /* collision in V6 space */ 1842 return (t_inp); 1843 } else { 1844 /* inp is BOUND_V4 no conflict */ 1845 continue; 1846 } 1847 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1848 /* t_inp is bound v4 and v6, conflict always */ 1849 return (t_inp); 1850 } else { 1851 /* t_inp is bound only V4 */ 1852 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1853 SCTP_IPV6_V6ONLY(inp)) { 1854 /* no conflict */ 1855 continue; 1856 } 1857 /* else fall through to conflict */ 1858 } 1859 return (t_inp); 1860 } 1861 return (NULL); 1862 } 1863 1864 1865 int 1866 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1867 { 1868 /* For 1-2-1 with port reuse */ 1869 struct sctppcbhead *head; 1870 struct sctp_inpcb *tinp, *ninp; 1871 1872 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1873 /* only works with port reuse on */ 1874 return (-1); 1875 } 1876 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1877 return (0); 1878 } 1879 SCTP_INP_RUNLOCK(inp); 1880 SCTP_INP_INFO_WLOCK(); 1881 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1882 SCTP_BASE_INFO(hashmark))]; 1883 /* Kick out all non-listeners to the TCP hash */ 1884 LIST_FOREACH_SAFE(tinp, head, sctp_hash, ninp) { 1885 if (tinp->sctp_lport != inp->sctp_lport) { 1886 continue; 1887 } 1888 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1889 continue; 1890 } 1891 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1892 continue; 1893 } 1894 if (tinp->sctp_socket->so_qlimit) { 1895 continue; 1896 } 1897 SCTP_INP_WLOCK(tinp); 1898 LIST_REMOVE(tinp, sctp_hash); 1899 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1900 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1901 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1902 SCTP_INP_WUNLOCK(tinp); 1903 } 1904 SCTP_INP_WLOCK(inp); 1905 /* Pull from where he was */ 1906 LIST_REMOVE(inp, sctp_hash); 1907 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1908 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1909 LIST_INSERT_HEAD(head, inp, sctp_hash); 1910 SCTP_INP_WUNLOCK(inp); 1911 SCTP_INP_RLOCK(inp); 1912 SCTP_INP_INFO_WUNLOCK(); 1913 return (0); 1914 } 1915 1916 1917 struct sctp_inpcb * 1918 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1919 uint32_t vrf_id) 1920 { 1921 /* 1922 * First we check the hash table to see if someone has this port 1923 * bound with just the port. 1924 */ 1925 struct sctp_inpcb *inp; 1926 struct sctppcbhead *head; 1927 int lport; 1928 unsigned int i; 1929 1930 #ifdef INET 1931 struct sockaddr_in *sin; 1932 1933 #endif 1934 #ifdef INET6 1935 struct sockaddr_in6 *sin6; 1936 1937 #endif 1938 1939 switch (nam->sa_family) { 1940 #ifdef INET 1941 case AF_INET: 1942 sin = (struct sockaddr_in *)nam; 1943 lport = sin->sin_port; 1944 break; 1945 #endif 1946 #ifdef INET6 1947 case AF_INET6: 1948 sin6 = (struct sockaddr_in6 *)nam; 1949 lport = sin6->sin6_port; 1950 break; 1951 #endif 1952 default: 1953 return (NULL); 1954 } 1955 /* 1956 * I could cheat here and just cast to one of the types but we will 1957 * do it right. It also provides the check against an Unsupported 1958 * type too. 1959 */ 1960 /* Find the head of the ALLADDR chain */ 1961 if (have_lock == 0) { 1962 SCTP_INP_INFO_RLOCK(); 1963 } 1964 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1965 SCTP_BASE_INFO(hashmark))]; 1966 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1967 1968 /* 1969 * If the TCP model exists it could be that the main listening 1970 * endpoint is gone but there still exists a connected socket for 1971 * this guy. If so we can return the first one that we find. This 1972 * may NOT be the correct one so the caller should be wary on the 1973 * returned INP. Currently the only caller that sets find_tcp_pool 1974 * is in bindx where we are verifying that a user CAN bind the 1975 * address. He either has bound it already, or someone else has, or 1976 * its open to bind, so this is good enough. 1977 */ 1978 if (inp == NULL && find_tcp_pool) { 1979 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1980 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1981 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1982 if (inp) { 1983 break; 1984 } 1985 } 1986 } 1987 if (inp) { 1988 SCTP_INP_INCR_REF(inp); 1989 } 1990 if (have_lock == 0) { 1991 SCTP_INP_INFO_RUNLOCK(); 1992 } 1993 return (inp); 1994 } 1995 1996 1997 /* 1998 * Find an association for an endpoint with the pointer to whom you want to 1999 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2000 * need to change the *to to some other struct like a mbuf... 2001 */ 2002 struct sctp_tcb * 2003 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2004 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2005 uint32_t vrf_id) 2006 { 2007 struct sctp_inpcb *inp = NULL; 2008 struct sctp_tcb *stcb; 2009 2010 SCTP_INP_INFO_RLOCK(); 2011 if (find_tcp_pool) { 2012 if (inp_p != NULL) { 2013 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2014 vrf_id); 2015 } else { 2016 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2017 vrf_id); 2018 } 2019 if (stcb != NULL) { 2020 SCTP_INP_INFO_RUNLOCK(); 2021 return (stcb); 2022 } 2023 } 2024 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2025 if (inp_p != NULL) { 2026 *inp_p = inp; 2027 } 2028 SCTP_INP_INFO_RUNLOCK(); 2029 if (inp == NULL) { 2030 return (NULL); 2031 } 2032 /* 2033 * ok, we have an endpoint, now lets find the assoc for it (if any) 2034 * we now place the source address or from in the to of the find 2035 * endpoint call. Since in reality this chain is used from the 2036 * inbound packet side. 2037 */ 2038 if (inp_p != NULL) { 2039 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2040 NULL); 2041 } else { 2042 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2043 NULL); 2044 } 2045 return (stcb); 2046 } 2047 2048 2049 /* 2050 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2051 * find all addresses that the sender has specified in any address list. Each 2052 * address will be used to lookup the TCB and see if one exits. 2053 */ 2054 static struct sctp_tcb * 2055 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2056 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2057 struct sockaddr *dst) 2058 { 2059 struct sctp_paramhdr *phdr, parm_buf; 2060 2061 #if defined(INET) || defined(INET6) 2062 struct sctp_tcb *stcb; 2063 uint16_t ptype; 2064 2065 #endif 2066 uint16_t plen; 2067 2068 #ifdef INET 2069 struct sockaddr_in sin4; 2070 2071 #endif 2072 #ifdef INET6 2073 struct sockaddr_in6 sin6; 2074 2075 #endif 2076 2077 #ifdef INET 2078 memset(&sin4, 0, sizeof(sin4)); 2079 sin4.sin_len = sizeof(sin4); 2080 sin4.sin_family = AF_INET; 2081 sin4.sin_port = sh->src_port; 2082 #endif 2083 #ifdef INET6 2084 memset(&sin6, 0, sizeof(sin6)); 2085 sin6.sin6_len = sizeof(sin6); 2086 sin6.sin6_family = AF_INET6; 2087 sin6.sin6_port = sh->src_port; 2088 #endif 2089 2090 offset += sizeof(struct sctp_init_chunk); 2091 2092 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2093 while (phdr != NULL) { 2094 /* now we must see if we want the parameter */ 2095 #if defined(INET) || defined(INET6) 2096 ptype = ntohs(phdr->param_type); 2097 #endif 2098 plen = ntohs(phdr->param_length); 2099 if (plen == 0) { 2100 break; 2101 } 2102 #ifdef INET 2103 if (ptype == SCTP_IPV4_ADDRESS && 2104 plen == sizeof(struct sctp_ipv4addr_param)) { 2105 /* Get the rest of the address */ 2106 struct sctp_ipv4addr_param ip4_parm, *p4; 2107 2108 phdr = sctp_get_next_param(m, offset, 2109 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2110 if (phdr == NULL) { 2111 return (NULL); 2112 } 2113 p4 = (struct sctp_ipv4addr_param *)phdr; 2114 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2115 /* look it up */ 2116 stcb = sctp_findassociation_ep_addr(inp_p, 2117 (struct sockaddr *)&sin4, netp, dst, NULL); 2118 if (stcb != NULL) { 2119 return (stcb); 2120 } 2121 } 2122 #endif 2123 #ifdef INET6 2124 if (ptype == SCTP_IPV6_ADDRESS && 2125 plen == sizeof(struct sctp_ipv6addr_param)) { 2126 /* Get the rest of the address */ 2127 struct sctp_ipv6addr_param ip6_parm, *p6; 2128 2129 phdr = sctp_get_next_param(m, offset, 2130 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2131 if (phdr == NULL) { 2132 return (NULL); 2133 } 2134 p6 = (struct sctp_ipv6addr_param *)phdr; 2135 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2136 /* look it up */ 2137 stcb = sctp_findassociation_ep_addr(inp_p, 2138 (struct sockaddr *)&sin6, netp, dst, NULL); 2139 if (stcb != NULL) { 2140 return (stcb); 2141 } 2142 } 2143 #endif 2144 offset += SCTP_SIZE32(plen); 2145 phdr = sctp_get_next_param(m, offset, &parm_buf, 2146 sizeof(parm_buf)); 2147 } 2148 return (NULL); 2149 } 2150 2151 static struct sctp_tcb * 2152 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2153 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2154 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2155 { 2156 /* 2157 * Use my vtag to hash. If we find it we then verify the source addr 2158 * is in the assoc. If all goes well we save a bit on rec of a 2159 * packet. 2160 */ 2161 struct sctpasochead *head; 2162 struct sctp_nets *net; 2163 struct sctp_tcb *stcb; 2164 2165 SCTP_INP_INFO_RLOCK(); 2166 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2167 SCTP_BASE_INFO(hashasocmark))]; 2168 LIST_FOREACH(stcb, head, sctp_asocs) { 2169 SCTP_INP_RLOCK(stcb->sctp_ep); 2170 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2171 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2172 continue; 2173 } 2174 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2175 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2176 continue; 2177 } 2178 SCTP_TCB_LOCK(stcb); 2179 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2180 if (stcb->asoc.my_vtag == vtag) { 2181 /* candidate */ 2182 if (stcb->rport != rport) { 2183 SCTP_TCB_UNLOCK(stcb); 2184 continue; 2185 } 2186 if (stcb->sctp_ep->sctp_lport != lport) { 2187 SCTP_TCB_UNLOCK(stcb); 2188 continue; 2189 } 2190 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2191 SCTP_TCB_UNLOCK(stcb); 2192 continue; 2193 } 2194 /* RRS:Need toaddr check here */ 2195 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2196 /* Endpoint does not own this address */ 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 if (remote_tag) { 2201 /* 2202 * If we have both vtags that's all we match 2203 * on 2204 */ 2205 if (stcb->asoc.peer_vtag == remote_tag) { 2206 /* 2207 * If both tags match we consider it 2208 * conclusive and check NO 2209 * source/destination addresses 2210 */ 2211 goto conclusive; 2212 } 2213 } 2214 if (skip_src_check) { 2215 conclusive: 2216 if (from) { 2217 *netp = sctp_findnet(stcb, from); 2218 } else { 2219 *netp = NULL; /* unknown */ 2220 } 2221 if (inp_p) 2222 *inp_p = stcb->sctp_ep; 2223 SCTP_INP_INFO_RUNLOCK(); 2224 return (stcb); 2225 } 2226 net = sctp_findnet(stcb, from); 2227 if (net) { 2228 /* yep its him. */ 2229 *netp = net; 2230 SCTP_STAT_INCR(sctps_vtagexpress); 2231 *inp_p = stcb->sctp_ep; 2232 SCTP_INP_INFO_RUNLOCK(); 2233 return (stcb); 2234 } else { 2235 /* 2236 * not him, this should only happen in rare 2237 * cases so I peg it. 2238 */ 2239 SCTP_STAT_INCR(sctps_vtagbogus); 2240 } 2241 } 2242 SCTP_TCB_UNLOCK(stcb); 2243 } 2244 SCTP_INP_INFO_RUNLOCK(); 2245 return (NULL); 2246 } 2247 2248 2249 /* 2250 * Find an association with the pointer to the inbound IP packet. This can be 2251 * a IPv4 or IPv6 packet. 2252 */ 2253 struct sctp_tcb * 2254 sctp_findassociation_addr(struct mbuf *m, int offset, 2255 struct sockaddr *src, struct sockaddr *dst, 2256 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2257 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2258 { 2259 struct sctp_tcb *stcb; 2260 struct sctp_inpcb *inp; 2261 2262 if (sh->v_tag) { 2263 /* we only go down this path if vtag is non-zero */ 2264 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2265 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2266 if (stcb) { 2267 return (stcb); 2268 } 2269 } 2270 if (inp_p) { 2271 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2272 1, vrf_id); 2273 inp = *inp_p; 2274 } else { 2275 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2276 1, vrf_id); 2277 } 2278 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2279 if (stcb == NULL && inp) { 2280 /* Found a EP but not this address */ 2281 if ((ch->chunk_type == SCTP_INITIATION) || 2282 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2283 /*- 2284 * special hook, we do NOT return linp or an 2285 * association that is linked to an existing 2286 * association that is under the TCP pool (i.e. no 2287 * listener exists). The endpoint finding routine 2288 * will always find a listener before examining the 2289 * TCP pool. 2290 */ 2291 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2292 if (inp_p) { 2293 *inp_p = NULL; 2294 } 2295 return (NULL); 2296 } 2297 stcb = sctp_findassociation_special_addr(m, 2298 offset, sh, &inp, netp, dst); 2299 if (inp_p != NULL) { 2300 *inp_p = inp; 2301 } 2302 } 2303 } 2304 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2305 return (stcb); 2306 } 2307 2308 /* 2309 * lookup an association by an ASCONF lookup address. 2310 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2311 */ 2312 struct sctp_tcb * 2313 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2314 struct sockaddr *dst, struct sctphdr *sh, 2315 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2316 { 2317 struct sctp_tcb *stcb; 2318 union sctp_sockstore remote_store; 2319 struct sctp_paramhdr parm_buf, *phdr; 2320 int ptype; 2321 int zero_address = 0; 2322 2323 #ifdef INET 2324 struct sockaddr_in *sin; 2325 2326 #endif 2327 #ifdef INET6 2328 struct sockaddr_in6 *sin6; 2329 2330 #endif 2331 2332 memset(&remote_store, 0, sizeof(remote_store)); 2333 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2334 &parm_buf, sizeof(struct sctp_paramhdr)); 2335 if (phdr == NULL) { 2336 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2337 __func__); 2338 return NULL; 2339 } 2340 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2341 /* get the correlation address */ 2342 switch (ptype) { 2343 #ifdef INET6 2344 case SCTP_IPV6_ADDRESS: 2345 { 2346 /* ipv6 address param */ 2347 struct sctp_ipv6addr_param *p6, p6_buf; 2348 2349 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2350 return NULL; 2351 } 2352 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2353 offset + sizeof(struct sctp_asconf_chunk), 2354 &p6_buf.ph, sizeof(*p6)); 2355 if (p6 == NULL) { 2356 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2357 __func__); 2358 return (NULL); 2359 } 2360 sin6 = &remote_store.sin6; 2361 sin6->sin6_family = AF_INET6; 2362 sin6->sin6_len = sizeof(*sin6); 2363 sin6->sin6_port = sh->src_port; 2364 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2365 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2366 zero_address = 1; 2367 break; 2368 } 2369 #endif 2370 #ifdef INET 2371 case SCTP_IPV4_ADDRESS: 2372 { 2373 /* ipv4 address param */ 2374 struct sctp_ipv4addr_param *p4, p4_buf; 2375 2376 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2377 return NULL; 2378 } 2379 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2380 offset + sizeof(struct sctp_asconf_chunk), 2381 &p4_buf.ph, sizeof(*p4)); 2382 if (p4 == NULL) { 2383 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2384 __func__); 2385 return (NULL); 2386 } 2387 sin = &remote_store.sin; 2388 sin->sin_family = AF_INET; 2389 sin->sin_len = sizeof(*sin); 2390 sin->sin_port = sh->src_port; 2391 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2392 if (sin->sin_addr.s_addr == INADDR_ANY) 2393 zero_address = 1; 2394 break; 2395 } 2396 #endif 2397 default: 2398 /* invalid address param type */ 2399 return NULL; 2400 } 2401 2402 if (zero_address) { 2403 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2404 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2405 if (stcb != NULL) { 2406 SCTP_INP_DECR_REF(*inp_p); 2407 } 2408 } else { 2409 stcb = sctp_findassociation_ep_addr(inp_p, 2410 &remote_store.sa, netp, 2411 dst, NULL); 2412 } 2413 return (stcb); 2414 } 2415 2416 2417 /* 2418 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2419 * addresses. This way if we don't get a bind we by default pick a ephemeral 2420 * port with all addresses bound. 2421 */ 2422 int 2423 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2424 { 2425 /* 2426 * we get called when a new endpoint starts up. We need to allocate 2427 * the sctp_inpcb structure from the zone and init it. Mark it as 2428 * unbound and find a port that we can use as an ephemeral with 2429 * INADDR_ANY. If the user binds later no problem we can then add in 2430 * the specific addresses. And setup the default parameters for the 2431 * EP. 2432 */ 2433 int i, error; 2434 struct sctp_inpcb *inp; 2435 struct sctp_pcb *m; 2436 struct timeval time; 2437 sctp_sharedkey_t *null_key; 2438 2439 error = 0; 2440 2441 SCTP_INP_INFO_WLOCK(); 2442 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2443 if (inp == NULL) { 2444 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2445 SCTP_INP_INFO_WUNLOCK(); 2446 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2447 return (ENOBUFS); 2448 } 2449 /* zap it */ 2450 bzero(inp, sizeof(*inp)); 2451 2452 /* bump generations */ 2453 /* setup socket pointers */ 2454 inp->sctp_socket = so; 2455 inp->ip_inp.inp.inp_socket = so; 2456 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2457 #ifdef INET6 2458 if (INP_SOCKAF(so) == AF_INET6) { 2459 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2460 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2461 } 2462 if (MODULE_GLOBAL(ip6_v6only)) { 2463 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2464 } 2465 } 2466 #endif 2467 inp->sctp_associd_counter = 1; 2468 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2469 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2470 inp->max_cwnd = 0; 2471 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2472 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2473 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2474 if (SCTP_BASE_SYSCTL(sctp_auth_disable)) { 2475 inp->auth_supported = 0; 2476 } else { 2477 inp->auth_supported = 1; 2478 } 2479 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2480 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2481 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2482 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2483 inp->fibnum = so->so_fibnum; 2484 /* init the small hash table we use to track asocid <-> tcb */ 2485 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2486 if (inp->sctp_asocidhash == NULL) { 2487 crfree(inp->ip_inp.inp.inp_cred); 2488 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2489 SCTP_INP_INFO_WUNLOCK(); 2490 return (ENOBUFS); 2491 } 2492 #ifdef IPSEC 2493 error = ipsec_init_policy(so, &inp->ip_inp.inp.inp_sp); 2494 if (error != 0) { 2495 crfree(inp->ip_inp.inp.inp_cred); 2496 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2497 SCTP_INP_INFO_WUNLOCK(); 2498 return error; 2499 } 2500 #endif /* IPSEC */ 2501 SCTP_INCR_EP_COUNT(); 2502 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2503 SCTP_INP_INFO_WUNLOCK(); 2504 2505 so->so_pcb = (caddr_t)inp; 2506 2507 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2508 /* UDP style socket */ 2509 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2510 SCTP_PCB_FLAGS_UNBOUND); 2511 /* Be sure it is NON-BLOCKING IO for UDP */ 2512 /* SCTP_SET_SO_NBIO(so); */ 2513 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2514 /* TCP style socket */ 2515 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2516 SCTP_PCB_FLAGS_UNBOUND); 2517 /* Be sure we have blocking IO by default */ 2518 SCTP_CLEAR_SO_NBIO(so); 2519 } else { 2520 /* 2521 * unsupported socket type (RAW, etc)- in case we missed it 2522 * in protosw 2523 */ 2524 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2525 so->so_pcb = NULL; 2526 crfree(inp->ip_inp.inp.inp_cred); 2527 #ifdef IPSEC 2528 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2529 #endif 2530 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2531 return (EOPNOTSUPP); 2532 } 2533 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2534 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2535 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2536 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2537 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2538 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2539 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2540 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2541 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2542 } 2543 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2544 &inp->sctp_hashmark); 2545 if (inp->sctp_tcbhash == NULL) { 2546 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2547 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2548 so->so_pcb = NULL; 2549 crfree(inp->ip_inp.inp.inp_cred); 2550 #ifdef IPSEC 2551 ipsec_delete_pcbpolicy(&inp->ip_inp.inp); 2552 #endif 2553 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2554 return (ENOBUFS); 2555 } 2556 inp->def_vrf_id = vrf_id; 2557 2558 SCTP_INP_INFO_WLOCK(); 2559 SCTP_INP_LOCK_INIT(inp); 2560 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2561 SCTP_INP_READ_INIT(inp); 2562 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2563 /* lock the new ep */ 2564 SCTP_INP_WLOCK(inp); 2565 2566 /* add it to the info area */ 2567 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2568 SCTP_INP_INFO_WUNLOCK(); 2569 2570 TAILQ_INIT(&inp->read_queue); 2571 LIST_INIT(&inp->sctp_addr_list); 2572 2573 LIST_INIT(&inp->sctp_asoc_list); 2574 2575 #ifdef SCTP_TRACK_FREED_ASOCS 2576 /* TEMP CODE */ 2577 LIST_INIT(&inp->sctp_asoc_free_list); 2578 #endif 2579 /* Init the timer structure for signature change */ 2580 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2581 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2582 2583 /* now init the actual endpoint default data */ 2584 m = &inp->sctp_ep; 2585 2586 /* setup the base timeout information */ 2587 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2588 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2589 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2590 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2591 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2592 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2593 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2594 /* all max/min max are in ms */ 2595 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2596 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2597 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2598 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2599 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2600 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2601 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2602 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2603 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2604 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2605 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2606 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2607 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2608 2609 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2610 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2611 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2612 /* number of streams to pre-open on a association */ 2613 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2614 2615 /* Add adaptation cookie */ 2616 m->adaptation_layer_indicator = 0; 2617 m->adaptation_layer_indicator_provided = 0; 2618 2619 /* seed random number generator */ 2620 m->random_counter = 1; 2621 m->store_at = SCTP_SIGNATURE_SIZE; 2622 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2623 sctp_fill_random_store(m); 2624 2625 /* Minimum cookie size */ 2626 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2627 sizeof(struct sctp_state_cookie); 2628 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2629 2630 /* Setup the initial secret */ 2631 (void)SCTP_GETTIME_TIMEVAL(&time); 2632 m->time_of_secret_change = time.tv_sec; 2633 2634 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2635 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2636 } 2637 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2638 2639 /* How long is a cookie good for ? */ 2640 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2641 /* 2642 * Initialize authentication parameters 2643 */ 2644 m->local_hmacs = sctp_default_supported_hmaclist(); 2645 m->local_auth_chunks = sctp_alloc_chunklist(); 2646 if (inp->asconf_supported) { 2647 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2648 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2649 } 2650 m->default_dscp = 0; 2651 #ifdef INET6 2652 m->default_flowlabel = 0; 2653 #endif 2654 m->port = 0; /* encapsulation disabled by default */ 2655 LIST_INIT(&m->shared_keys); 2656 /* add default NULL key as key id 0 */ 2657 null_key = sctp_alloc_sharedkey(); 2658 sctp_insert_sharedkey(&m->shared_keys, null_key); 2659 SCTP_INP_WUNLOCK(inp); 2660 #ifdef SCTP_LOG_CLOSING 2661 sctp_log_closing(inp, NULL, 12); 2662 #endif 2663 return (error); 2664 } 2665 2666 2667 void 2668 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2669 struct sctp_tcb *stcb) 2670 { 2671 struct sctp_nets *net; 2672 uint16_t lport, rport; 2673 struct sctppcbhead *head; 2674 struct sctp_laddr *laddr, *oladdr; 2675 2676 atomic_add_int(&stcb->asoc.refcnt, 1); 2677 SCTP_TCB_UNLOCK(stcb); 2678 SCTP_INP_INFO_WLOCK(); 2679 SCTP_INP_WLOCK(old_inp); 2680 SCTP_INP_WLOCK(new_inp); 2681 SCTP_TCB_LOCK(stcb); 2682 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2683 2684 new_inp->sctp_ep.time_of_secret_change = 2685 old_inp->sctp_ep.time_of_secret_change; 2686 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2687 sizeof(old_inp->sctp_ep.secret_key)); 2688 new_inp->sctp_ep.current_secret_number = 2689 old_inp->sctp_ep.current_secret_number; 2690 new_inp->sctp_ep.last_secret_number = 2691 old_inp->sctp_ep.last_secret_number; 2692 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2693 2694 /* make it so new data pours into the new socket */ 2695 stcb->sctp_socket = new_inp->sctp_socket; 2696 stcb->sctp_ep = new_inp; 2697 2698 /* Copy the port across */ 2699 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2700 rport = stcb->rport; 2701 /* Pull the tcb from the old association */ 2702 LIST_REMOVE(stcb, sctp_tcbhash); 2703 LIST_REMOVE(stcb, sctp_tcblist); 2704 if (stcb->asoc.in_asocid_hash) { 2705 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2706 } 2707 /* Now insert the new_inp into the TCP connected hash */ 2708 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2709 2710 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2711 /* Its safe to access */ 2712 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2713 2714 /* Now move the tcb into the endpoint list */ 2715 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2716 /* 2717 * Question, do we even need to worry about the ep-hash since we 2718 * only have one connection? Probably not :> so lets get rid of it 2719 * and not suck up any kernel memory in that. 2720 */ 2721 if (stcb->asoc.in_asocid_hash) { 2722 struct sctpasochead *lhd; 2723 2724 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2725 new_inp->hashasocidmark)]; 2726 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2727 } 2728 /* Ok. Let's restart timer. */ 2729 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2730 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2731 stcb, net); 2732 } 2733 2734 SCTP_INP_INFO_WUNLOCK(); 2735 if (new_inp->sctp_tcbhash != NULL) { 2736 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2737 new_inp->sctp_tcbhash = NULL; 2738 } 2739 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2740 /* Subset bound, so copy in the laddr list from the old_inp */ 2741 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2742 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2743 if (laddr == NULL) { 2744 /* 2745 * Gak, what can we do? This assoc is really 2746 * HOSED. We probably should send an abort 2747 * here. 2748 */ 2749 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2750 continue; 2751 } 2752 SCTP_INCR_LADDR_COUNT(); 2753 bzero(laddr, sizeof(*laddr)); 2754 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2755 laddr->ifa = oladdr->ifa; 2756 atomic_add_int(&laddr->ifa->refcount, 1); 2757 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2758 sctp_nxt_addr); 2759 new_inp->laddr_count++; 2760 if (oladdr == stcb->asoc.last_used_address) { 2761 stcb->asoc.last_used_address = laddr; 2762 } 2763 } 2764 } 2765 /* 2766 * Now any running timers need to be adjusted since we really don't 2767 * care if they are running or not just blast in the new_inp into 2768 * all of them. 2769 */ 2770 2771 stcb->asoc.dack_timer.ep = (void *)new_inp; 2772 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2773 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2774 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2775 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2776 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2777 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2778 /* now what about the nets? */ 2779 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2780 net->pmtu_timer.ep = (void *)new_inp; 2781 net->hb_timer.ep = (void *)new_inp; 2782 net->rxt_timer.ep = (void *)new_inp; 2783 } 2784 SCTP_INP_WUNLOCK(new_inp); 2785 SCTP_INP_WUNLOCK(old_inp); 2786 } 2787 2788 /* 2789 * insert an laddr entry with the given ifa for the desired list 2790 */ 2791 static int 2792 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 2793 { 2794 struct sctp_laddr *laddr; 2795 2796 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2797 if (laddr == NULL) { 2798 /* out of memory? */ 2799 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2800 return (EINVAL); 2801 } 2802 SCTP_INCR_LADDR_COUNT(); 2803 bzero(laddr, sizeof(*laddr)); 2804 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2805 laddr->ifa = ifa; 2806 laddr->action = act; 2807 atomic_add_int(&ifa->refcount, 1); 2808 /* insert it */ 2809 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 2810 2811 return (0); 2812 } 2813 2814 /* 2815 * Remove an laddr entry from the local address list (on an assoc) 2816 */ 2817 static void 2818 sctp_remove_laddr(struct sctp_laddr *laddr) 2819 { 2820 2821 /* remove from the list */ 2822 LIST_REMOVE(laddr, sctp_nxt_addr); 2823 sctp_free_ifa(laddr->ifa); 2824 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 2825 SCTP_DECR_LADDR_COUNT(); 2826 } 2827 2828 2829 2830 /* sctp_ifap is used to bypass normal local address validation checks */ 2831 int 2832 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2833 struct sctp_ifa *sctp_ifap, struct thread *p) 2834 { 2835 /* bind a ep to a socket address */ 2836 struct sctppcbhead *head; 2837 struct sctp_inpcb *inp, *inp_tmp; 2838 struct inpcb *ip_inp; 2839 int port_reuse_active = 0; 2840 int bindall; 2841 uint16_t lport; 2842 int error; 2843 uint32_t vrf_id; 2844 2845 lport = 0; 2846 bindall = 1; 2847 inp = (struct sctp_inpcb *)so->so_pcb; 2848 ip_inp = (struct inpcb *)so->so_pcb; 2849 #ifdef SCTP_DEBUG 2850 if (addr) { 2851 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2852 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2853 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2854 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2855 } 2856 #endif 2857 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2858 /* already did a bind, subsequent binds NOT allowed ! */ 2859 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2860 return (EINVAL); 2861 } 2862 #ifdef INVARIANTS 2863 if (p == NULL) 2864 panic("null proc/thread"); 2865 #endif 2866 if (addr != NULL) { 2867 switch (addr->sa_family) { 2868 #ifdef INET 2869 case AF_INET: 2870 { 2871 struct sockaddr_in *sin; 2872 2873 /* IPV6_V6ONLY socket? */ 2874 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2875 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2876 return (EINVAL); 2877 } 2878 if (addr->sa_len != sizeof(*sin)) { 2879 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2880 return (EINVAL); 2881 } 2882 sin = (struct sockaddr_in *)addr; 2883 lport = sin->sin_port; 2884 /* 2885 * For LOOPBACK the prison_local_ip4() call 2886 * will transmute the ip address to the 2887 * proper value. 2888 */ 2889 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2890 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2891 return (error); 2892 } 2893 if (sin->sin_addr.s_addr != INADDR_ANY) { 2894 bindall = 0; 2895 } 2896 break; 2897 } 2898 #endif 2899 #ifdef INET6 2900 case AF_INET6: 2901 { 2902 /* 2903 * Only for pure IPv6 Address. (No IPv4 2904 * Mapped!) 2905 */ 2906 struct sockaddr_in6 *sin6; 2907 2908 sin6 = (struct sockaddr_in6 *)addr; 2909 2910 if (addr->sa_len != sizeof(*sin6)) { 2911 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2912 return (EINVAL); 2913 } 2914 lport = sin6->sin6_port; 2915 /* 2916 * For LOOPBACK the prison_local_ip6() call 2917 * will transmute the ipv6 address to the 2918 * proper value. 2919 */ 2920 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2921 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2922 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2923 return (error); 2924 } 2925 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2926 bindall = 0; 2927 /* KAME hack: embed scopeid */ 2928 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2929 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2930 return (EINVAL); 2931 } 2932 } 2933 /* this must be cleared for ifa_ifwithaddr() */ 2934 sin6->sin6_scope_id = 0; 2935 break; 2936 } 2937 #endif 2938 default: 2939 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2940 return (EAFNOSUPPORT); 2941 } 2942 } 2943 SCTP_INP_INFO_WLOCK(); 2944 SCTP_INP_WLOCK(inp); 2945 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2946 vrf_id = inp->def_vrf_id; 2947 2948 /* increase our count due to the unlock we do */ 2949 SCTP_INP_INCR_REF(inp); 2950 if (lport) { 2951 /* 2952 * Did the caller specify a port? if so we must see if an ep 2953 * already has this one bound. 2954 */ 2955 /* got to be root to get at low ports */ 2956 if (ntohs(lport) < IPPORT_RESERVED) { 2957 if (p && (error = 2958 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2959 )) { 2960 SCTP_INP_DECR_REF(inp); 2961 SCTP_INP_WUNLOCK(inp); 2962 SCTP_INP_INFO_WUNLOCK(); 2963 return (error); 2964 } 2965 } 2966 SCTP_INP_WUNLOCK(inp); 2967 if (bindall) { 2968 vrf_id = inp->def_vrf_id; 2969 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2970 if (inp_tmp != NULL) { 2971 /* 2972 * lock guy returned and lower count note 2973 * that we are not bound so inp_tmp should 2974 * NEVER be inp. And it is this inp 2975 * (inp_tmp) that gets the reference bump, 2976 * so we must lower it. 2977 */ 2978 SCTP_INP_DECR_REF(inp_tmp); 2979 /* unlock info */ 2980 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2981 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2982 /* 2983 * Ok, must be one-2-one and 2984 * allowing port re-use 2985 */ 2986 port_reuse_active = 1; 2987 goto continue_anyway; 2988 } 2989 SCTP_INP_DECR_REF(inp); 2990 SCTP_INP_INFO_WUNLOCK(); 2991 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2992 return (EADDRINUSE); 2993 } 2994 } else { 2995 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2996 if (inp_tmp != NULL) { 2997 /* 2998 * lock guy returned and lower count note 2999 * that we are not bound so inp_tmp should 3000 * NEVER be inp. And it is this inp 3001 * (inp_tmp) that gets the reference bump, 3002 * so we must lower it. 3003 */ 3004 SCTP_INP_DECR_REF(inp_tmp); 3005 /* unlock info */ 3006 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3007 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3008 /* 3009 * Ok, must be one-2-one and 3010 * allowing port re-use 3011 */ 3012 port_reuse_active = 1; 3013 goto continue_anyway; 3014 } 3015 SCTP_INP_DECR_REF(inp); 3016 SCTP_INP_INFO_WUNLOCK(); 3017 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3018 return (EADDRINUSE); 3019 } 3020 } 3021 continue_anyway: 3022 SCTP_INP_WLOCK(inp); 3023 if (bindall) { 3024 /* verify that no lport is not used by a singleton */ 3025 if ((port_reuse_active == 0) && 3026 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3027 /* Sorry someone already has this one bound */ 3028 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3029 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3030 port_reuse_active = 1; 3031 } else { 3032 SCTP_INP_DECR_REF(inp); 3033 SCTP_INP_WUNLOCK(inp); 3034 SCTP_INP_INFO_WUNLOCK(); 3035 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3036 return (EADDRINUSE); 3037 } 3038 } 3039 } 3040 } else { 3041 uint16_t first, last, candidate; 3042 uint16_t count; 3043 int done; 3044 3045 if (ip_inp->inp_flags & INP_HIGHPORT) { 3046 first = MODULE_GLOBAL(ipport_hifirstauto); 3047 last = MODULE_GLOBAL(ipport_hilastauto); 3048 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3049 if (p && (error = 3050 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3051 )) { 3052 SCTP_INP_DECR_REF(inp); 3053 SCTP_INP_WUNLOCK(inp); 3054 SCTP_INP_INFO_WUNLOCK(); 3055 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3056 return (error); 3057 } 3058 first = MODULE_GLOBAL(ipport_lowfirstauto); 3059 last = MODULE_GLOBAL(ipport_lowlastauto); 3060 } else { 3061 first = MODULE_GLOBAL(ipport_firstauto); 3062 last = MODULE_GLOBAL(ipport_lastauto); 3063 } 3064 if (first > last) { 3065 uint16_t temp; 3066 3067 temp = first; 3068 first = last; 3069 last = temp; 3070 } 3071 count = last - first + 1; /* number of candidates */ 3072 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3073 3074 done = 0; 3075 while (!done) { 3076 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3077 done = 1; 3078 } 3079 if (!done) { 3080 if (--count == 0) { 3081 SCTP_INP_DECR_REF(inp); 3082 SCTP_INP_WUNLOCK(inp); 3083 SCTP_INP_INFO_WUNLOCK(); 3084 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3085 return (EADDRINUSE); 3086 } 3087 if (candidate == last) 3088 candidate = first; 3089 else 3090 candidate = candidate + 1; 3091 } 3092 } 3093 lport = htons(candidate); 3094 } 3095 SCTP_INP_DECR_REF(inp); 3096 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3097 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3098 /* 3099 * this really should not happen. The guy did a non-blocking 3100 * bind and then did a close at the same time. 3101 */ 3102 SCTP_INP_WUNLOCK(inp); 3103 SCTP_INP_INFO_WUNLOCK(); 3104 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3105 return (EINVAL); 3106 } 3107 /* ok we look clear to give out this port, so lets setup the binding */ 3108 if (bindall) { 3109 /* binding to all addresses, so just set in the proper flags */ 3110 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3111 /* set the automatic addr changes from kernel flag */ 3112 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3113 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3114 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3115 } else { 3116 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3117 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3118 } 3119 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3120 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3121 } else { 3122 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3123 } 3124 /* 3125 * set the automatic mobility_base from kernel flag (by 3126 * micchie) 3127 */ 3128 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3129 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3130 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3131 } else { 3132 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3133 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3134 } 3135 /* 3136 * set the automatic mobility_fasthandoff from kernel flag 3137 * (by micchie) 3138 */ 3139 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3140 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3141 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3142 } else { 3143 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3144 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3145 } 3146 } else { 3147 /* 3148 * bind specific, make sure flags is off and add a new 3149 * address structure to the sctp_addr_list inside the ep 3150 * structure. 3151 * 3152 * We will need to allocate one and insert it at the head. The 3153 * socketopt call can just insert new addresses in there as 3154 * well. It will also have to do the embed scope kame hack 3155 * too (before adding). 3156 */ 3157 struct sctp_ifa *ifa; 3158 union sctp_sockstore store; 3159 3160 memset(&store, 0, sizeof(store)); 3161 switch (addr->sa_family) { 3162 #ifdef INET 3163 case AF_INET: 3164 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3165 store.sin.sin_port = 0; 3166 break; 3167 #endif 3168 #ifdef INET6 3169 case AF_INET6: 3170 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3171 store.sin6.sin6_port = 0; 3172 break; 3173 #endif 3174 default: 3175 break; 3176 } 3177 /* 3178 * first find the interface with the bound address need to 3179 * zero out the port to find the address! yuck! can't do 3180 * this earlier since need port for sctp_pcb_findep() 3181 */ 3182 if (sctp_ifap != NULL) { 3183 ifa = sctp_ifap; 3184 } else { 3185 /* 3186 * Note for BSD we hit here always other O/S's will 3187 * pass things in via the sctp_ifap argument 3188 * (Panda). 3189 */ 3190 ifa = sctp_find_ifa_by_addr(&store.sa, 3191 vrf_id, SCTP_ADDR_NOT_LOCKED); 3192 } 3193 if (ifa == NULL) { 3194 /* Can't find an interface with that address */ 3195 SCTP_INP_WUNLOCK(inp); 3196 SCTP_INP_INFO_WUNLOCK(); 3197 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3198 return (EADDRNOTAVAIL); 3199 } 3200 #ifdef INET6 3201 if (addr->sa_family == AF_INET6) { 3202 /* GAK, more FIXME IFA lock? */ 3203 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3204 /* Can't bind a non-existent addr. */ 3205 SCTP_INP_WUNLOCK(inp); 3206 SCTP_INP_INFO_WUNLOCK(); 3207 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3208 return (EINVAL); 3209 } 3210 } 3211 #endif 3212 /* we're not bound all */ 3213 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3214 /* allow bindx() to send ASCONF's for binding changes */ 3215 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3216 /* clear automatic addr changes from kernel flag */ 3217 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3218 3219 /* add this address to the endpoint list */ 3220 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3221 if (error != 0) { 3222 SCTP_INP_WUNLOCK(inp); 3223 SCTP_INP_INFO_WUNLOCK(); 3224 return (error); 3225 } 3226 inp->laddr_count++; 3227 } 3228 /* find the bucket */ 3229 if (port_reuse_active) { 3230 /* Put it into tcp 1-2-1 hash */ 3231 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3232 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3233 } else { 3234 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3235 } 3236 /* put it in the bucket */ 3237 LIST_INSERT_HEAD(head, inp, sctp_hash); 3238 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3239 (void *)head, ntohs(lport), port_reuse_active); 3240 /* set in the port */ 3241 inp->sctp_lport = lport; 3242 3243 /* turn off just the unbound flag */ 3244 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3245 SCTP_INP_WUNLOCK(inp); 3246 SCTP_INP_INFO_WUNLOCK(); 3247 return (0); 3248 } 3249 3250 3251 static void 3252 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3253 { 3254 struct sctp_iterator *it, *nit; 3255 3256 /* 3257 * We enter with the only the ITERATOR_LOCK in place and a write 3258 * lock on the inp_info stuff. 3259 */ 3260 it = sctp_it_ctl.cur_it; 3261 if (it && (it->vn != curvnet)) { 3262 /* Its not looking at our VNET */ 3263 return; 3264 } 3265 if (it && (it->inp == inp)) { 3266 /* 3267 * This is tricky and we hold the iterator lock, but when it 3268 * returns and gets the lock (when we release it) the 3269 * iterator will try to operate on inp. We need to stop that 3270 * from happening. But of course the iterator has a 3271 * reference on the stcb and inp. We can mark it and it will 3272 * stop. 3273 * 3274 * If its a single iterator situation, we set the end iterator 3275 * flag. Otherwise we set the iterator to go to the next 3276 * inp. 3277 * 3278 */ 3279 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3280 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3281 } else { 3282 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3283 } 3284 } 3285 /* 3286 * Now go through and remove any single reference to our inp that 3287 * may be still pending on the list 3288 */ 3289 SCTP_IPI_ITERATOR_WQ_LOCK(); 3290 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3291 if (it->vn != curvnet) { 3292 continue; 3293 } 3294 if (it->inp == inp) { 3295 /* This one points to me is it inp specific? */ 3296 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3297 /* Remove and free this one */ 3298 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3299 it, sctp_nxt_itr); 3300 if (it->function_atend != NULL) { 3301 (*it->function_atend) (it->pointer, it->val); 3302 } 3303 SCTP_FREE(it, SCTP_M_ITER); 3304 } else { 3305 it->inp = LIST_NEXT(it->inp, sctp_list); 3306 if (it->inp) { 3307 SCTP_INP_INCR_REF(it->inp); 3308 } 3309 } 3310 /* 3311 * When its put in the refcnt is incremented so decr 3312 * it 3313 */ 3314 SCTP_INP_DECR_REF(inp); 3315 } 3316 } 3317 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3318 } 3319 3320 /* release sctp_inpcb unbind the port */ 3321 void 3322 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3323 { 3324 /* 3325 * Here we free a endpoint. We must find it (if it is in the Hash 3326 * table) and remove it from there. Then we must also find it in the 3327 * overall list and remove it from there. After all removals are 3328 * complete then any timer has to be stopped. Then start the actual 3329 * freeing. a) Any local lists. b) Any associations. c) The hash of 3330 * all associations. d) finally the ep itself. 3331 */ 3332 struct sctp_tcb *asoc, *nasoc; 3333 struct sctp_laddr *laddr, *nladdr; 3334 struct inpcb *ip_pcb; 3335 struct socket *so; 3336 int being_refed = 0; 3337 struct sctp_queued_to_read *sq, *nsq; 3338 int cnt; 3339 sctp_sharedkey_t *shared_key, *nshared_key; 3340 3341 3342 #ifdef SCTP_LOG_CLOSING 3343 sctp_log_closing(inp, NULL, 0); 3344 #endif 3345 SCTP_ITERATOR_LOCK(); 3346 /* mark any iterators on the list or being processed */ 3347 sctp_iterator_inp_being_freed(inp); 3348 SCTP_ITERATOR_UNLOCK(); 3349 so = inp->sctp_socket; 3350 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3351 /* been here before.. eeks.. get out of here */ 3352 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3353 #ifdef SCTP_LOG_CLOSING 3354 sctp_log_closing(inp, NULL, 1); 3355 #endif 3356 return; 3357 } 3358 SCTP_ASOC_CREATE_LOCK(inp); 3359 SCTP_INP_INFO_WLOCK(); 3360 3361 SCTP_INP_WLOCK(inp); 3362 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3363 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3364 /* socket is gone, so no more wakeups allowed */ 3365 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3366 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3367 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3368 3369 } 3370 /* First time through we have the socket lock, after that no more. */ 3371 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3372 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3373 3374 if (inp->control) { 3375 sctp_m_freem(inp->control); 3376 inp->control = NULL; 3377 } 3378 if (inp->pkt) { 3379 sctp_m_freem(inp->pkt); 3380 inp->pkt = NULL; 3381 } 3382 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3383 * here but I will be nice :> (i.e. 3384 * ip_pcb = ep;) */ 3385 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3386 int cnt_in_sd; 3387 3388 cnt_in_sd = 0; 3389 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3390 SCTP_TCB_LOCK(asoc); 3391 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3392 /* Skip guys being freed */ 3393 cnt_in_sd++; 3394 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3395 /* 3396 * Special case - we did not start a 3397 * kill timer on the asoc due to it 3398 * was not closed. So go ahead and 3399 * start it now. 3400 */ 3401 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3402 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3403 } 3404 SCTP_TCB_UNLOCK(asoc); 3405 continue; 3406 } 3407 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3408 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3409 (asoc->asoc.total_output_queue_size == 0)) { 3410 /* 3411 * If we have data in queue, we don't want 3412 * to just free since the app may have done, 3413 * send()/close or connect/send/close. And 3414 * it wants the data to get across first. 3415 */ 3416 /* Just abandon things in the front states */ 3417 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3418 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3419 cnt_in_sd++; 3420 } 3421 continue; 3422 } 3423 /* Disconnect the socket please */ 3424 asoc->sctp_socket = NULL; 3425 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3426 if ((asoc->asoc.size_on_reasm_queue > 0) || 3427 (asoc->asoc.control_pdapi) || 3428 (asoc->asoc.size_on_all_streams > 0) || 3429 (so && (so->so_rcv.sb_cc > 0))) { 3430 /* Left with Data unread */ 3431 struct mbuf *op_err; 3432 3433 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3434 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3435 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3436 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3437 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3438 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3439 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3440 } 3441 if (sctp_free_assoc(inp, asoc, 3442 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3443 cnt_in_sd++; 3444 } 3445 continue; 3446 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3447 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3448 (asoc->asoc.stream_queue_cnt == 0)) { 3449 if (asoc->asoc.locked_on_sending) { 3450 goto abort_anyway; 3451 } 3452 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3453 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3454 struct sctp_nets *netp; 3455 3456 /* 3457 * there is nothing queued to send, 3458 * so I send shutdown 3459 */ 3460 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3461 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3462 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3463 } 3464 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3465 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3466 sctp_stop_timers_for_shutdown(asoc); 3467 if (asoc->asoc.alternate) { 3468 netp = asoc->asoc.alternate; 3469 } else { 3470 netp = asoc->asoc.primary_destination; 3471 } 3472 sctp_send_shutdown(asoc, netp); 3473 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3474 netp); 3475 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3476 asoc->asoc.primary_destination); 3477 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3478 } 3479 } else { 3480 /* mark into shutdown pending */ 3481 struct sctp_stream_queue_pending *sp; 3482 3483 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3484 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3485 asoc->asoc.primary_destination); 3486 if (asoc->asoc.locked_on_sending) { 3487 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3488 sctp_streamhead); 3489 if (sp == NULL) { 3490 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3491 (void *)asoc->asoc.locked_on_sending, 3492 asoc->asoc.locked_on_sending->stream_no); 3493 } else { 3494 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3495 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3496 } 3497 } 3498 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3499 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3500 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3501 struct mbuf *op_err; 3502 3503 abort_anyway: 3504 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3505 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3506 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3507 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3508 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3509 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3510 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3511 } 3512 if (sctp_free_assoc(inp, asoc, 3513 SCTP_PCBFREE_NOFORCE, 3514 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3515 cnt_in_sd++; 3516 } 3517 continue; 3518 } else { 3519 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3520 } 3521 } 3522 cnt_in_sd++; 3523 SCTP_TCB_UNLOCK(asoc); 3524 } 3525 /* now is there some left in our SHUTDOWN state? */ 3526 if (cnt_in_sd) { 3527 #ifdef SCTP_LOG_CLOSING 3528 sctp_log_closing(inp, NULL, 2); 3529 #endif 3530 inp->sctp_socket = NULL; 3531 SCTP_INP_WUNLOCK(inp); 3532 SCTP_ASOC_CREATE_UNLOCK(inp); 3533 SCTP_INP_INFO_WUNLOCK(); 3534 return; 3535 } 3536 } 3537 inp->sctp_socket = NULL; 3538 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3539 SCTP_PCB_FLAGS_UNBOUND) { 3540 /* 3541 * ok, this guy has been bound. It's port is somewhere in 3542 * the SCTP_BASE_INFO(hash table). Remove it! 3543 */ 3544 LIST_REMOVE(inp, sctp_hash); 3545 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3546 } 3547 /* 3548 * If there is a timer running to kill us, forget it, since it may 3549 * have a contest on the INP lock.. which would cause us to die ... 3550 */ 3551 cnt = 0; 3552 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3553 SCTP_TCB_LOCK(asoc); 3554 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3555 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3556 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3557 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3558 } 3559 cnt++; 3560 SCTP_TCB_UNLOCK(asoc); 3561 continue; 3562 } 3563 /* Free associations that are NOT killing us */ 3564 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3565 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3566 struct mbuf *op_err; 3567 3568 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3569 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3570 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3571 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3572 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3573 cnt++; 3574 SCTP_TCB_UNLOCK(asoc); 3575 continue; 3576 } 3577 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3578 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3579 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3580 } 3581 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, 3582 SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3583 cnt++; 3584 } 3585 } 3586 if (cnt) { 3587 /* Ok we have someone out there that will kill us */ 3588 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3589 #ifdef SCTP_LOG_CLOSING 3590 sctp_log_closing(inp, NULL, 3); 3591 #endif 3592 SCTP_INP_WUNLOCK(inp); 3593 SCTP_ASOC_CREATE_UNLOCK(inp); 3594 SCTP_INP_INFO_WUNLOCK(); 3595 return; 3596 } 3597 if (SCTP_INP_LOCK_CONTENDED(inp)) 3598 being_refed++; 3599 if (SCTP_INP_READ_CONTENDED(inp)) 3600 being_refed++; 3601 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3602 being_refed++; 3603 3604 if ((inp->refcount) || 3605 (being_refed) || 3606 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3607 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3608 #ifdef SCTP_LOG_CLOSING 3609 sctp_log_closing(inp, NULL, 4); 3610 #endif 3611 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3612 SCTP_INP_WUNLOCK(inp); 3613 SCTP_ASOC_CREATE_UNLOCK(inp); 3614 SCTP_INP_INFO_WUNLOCK(); 3615 return; 3616 } 3617 inp->sctp_ep.signature_change.type = 0; 3618 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3619 /* 3620 * Remove it from the list .. last thing we need a lock for. 3621 */ 3622 LIST_REMOVE(inp, sctp_list); 3623 SCTP_INP_WUNLOCK(inp); 3624 SCTP_ASOC_CREATE_UNLOCK(inp); 3625 SCTP_INP_INFO_WUNLOCK(); 3626 /* 3627 * Now we release all locks. Since this INP cannot be found anymore 3628 * except possibly by the kill timer that might be running. We call 3629 * the drain function here. It should hit the case were it sees the 3630 * ACTIVE flag cleared and exit out freeing us to proceed and 3631 * destroy everything. 3632 */ 3633 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3634 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3635 } else { 3636 /* Probably un-needed */ 3637 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3638 } 3639 3640 #ifdef SCTP_LOG_CLOSING 3641 sctp_log_closing(inp, NULL, 5); 3642 #endif 3643 3644 3645 if ((inp->sctp_asocidhash) != NULL) { 3646 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3647 inp->sctp_asocidhash = NULL; 3648 } 3649 /* sa_ignore FREED_MEMORY */ 3650 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3651 /* Its only abandoned if it had data left */ 3652 if (sq->length) 3653 SCTP_STAT_INCR(sctps_left_abandon); 3654 3655 TAILQ_REMOVE(&inp->read_queue, sq, next); 3656 sctp_free_remote_addr(sq->whoFrom); 3657 if (so) 3658 so->so_rcv.sb_cc -= sq->length; 3659 if (sq->data) { 3660 sctp_m_freem(sq->data); 3661 sq->data = NULL; 3662 } 3663 /* 3664 * no need to free the net count, since at this point all 3665 * assoc's are gone. 3666 */ 3667 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3668 SCTP_DECR_READQ_COUNT(); 3669 } 3670 /* Now the sctp_pcb things */ 3671 /* 3672 * free each asoc if it is not already closed/free. we can't use the 3673 * macro here since le_next will get freed as part of the 3674 * sctp_free_assoc() call. 3675 */ 3676 #ifdef IPSEC 3677 ipsec_delete_pcbpolicy(ip_pcb); 3678 #endif 3679 if (ip_pcb->inp_options) { 3680 (void)sctp_m_free(ip_pcb->inp_options); 3681 ip_pcb->inp_options = 0; 3682 } 3683 #ifdef INET6 3684 if (ip_pcb->inp_vflag & INP_IPV6) { 3685 struct in6pcb *in6p; 3686 3687 in6p = (struct in6pcb *)inp; 3688 ip6_freepcbopts(in6p->in6p_outputopts); 3689 } 3690 #endif /* INET6 */ 3691 ip_pcb->inp_vflag = 0; 3692 /* free up authentication fields */ 3693 if (inp->sctp_ep.local_auth_chunks != NULL) 3694 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3695 if (inp->sctp_ep.local_hmacs != NULL) 3696 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3697 3698 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3699 LIST_REMOVE(shared_key, next); 3700 sctp_free_sharedkey(shared_key); 3701 /* sa_ignore FREED_MEMORY */ 3702 } 3703 3704 /* 3705 * if we have an address list the following will free the list of 3706 * ifaddr's that are set into this ep. Again macro limitations here, 3707 * since the LIST_FOREACH could be a bad idea. 3708 */ 3709 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3710 sctp_remove_laddr(laddr); 3711 } 3712 3713 #ifdef SCTP_TRACK_FREED_ASOCS 3714 /* TEMP CODE */ 3715 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3716 LIST_REMOVE(asoc, sctp_tcblist); 3717 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3718 SCTP_DECR_ASOC_COUNT(); 3719 } 3720 /* *** END TEMP CODE *** */ 3721 #endif 3722 /* Now lets see about freeing the EP hash table. */ 3723 if (inp->sctp_tcbhash != NULL) { 3724 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3725 inp->sctp_tcbhash = NULL; 3726 } 3727 /* Now we must put the ep memory back into the zone pool */ 3728 crfree(inp->ip_inp.inp.inp_cred); 3729 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3730 SCTP_INP_LOCK_DESTROY(inp); 3731 SCTP_INP_READ_DESTROY(inp); 3732 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3733 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3734 SCTP_DECR_EP_COUNT(); 3735 } 3736 3737 3738 struct sctp_nets * 3739 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3740 { 3741 struct sctp_nets *net; 3742 3743 /* locate the address */ 3744 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3745 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3746 return (net); 3747 } 3748 return (NULL); 3749 } 3750 3751 3752 int 3753 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3754 { 3755 struct sctp_ifa *sctp_ifa; 3756 3757 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3758 if (sctp_ifa) { 3759 return (1); 3760 } else { 3761 return (0); 3762 } 3763 } 3764 3765 /* 3766 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3767 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3768 * stats of stuff. 3769 */ 3770 int 3771 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3772 struct sctp_nets **netp, int set_scope, int from) 3773 { 3774 /* 3775 * The following is redundant to the same lines in the 3776 * sctp_aloc_assoc() but is needed since others call the add address 3777 * function 3778 */ 3779 struct sctp_nets *net, *netfirst; 3780 int addr_inscope; 3781 3782 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3783 from); 3784 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3785 3786 netfirst = sctp_findnet(stcb, newaddr); 3787 if (netfirst) { 3788 /* 3789 * Lie and return ok, we don't want to make the association 3790 * go away for this behavior. It will happen in the TCP 3791 * model in a connected socket. It does not reach the hash 3792 * table until after the association is built so it can't be 3793 * found. Mark as reachable, since the initial creation will 3794 * have been cleared and the NOT_IN_ASSOC flag will have 3795 * been added... and we don't want to end up removing it 3796 * back out. 3797 */ 3798 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3799 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3800 SCTP_ADDR_UNCONFIRMED); 3801 } else { 3802 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3803 } 3804 3805 return (0); 3806 } 3807 addr_inscope = 1; 3808 switch (newaddr->sa_family) { 3809 #ifdef INET 3810 case AF_INET: 3811 { 3812 struct sockaddr_in *sin; 3813 3814 sin = (struct sockaddr_in *)newaddr; 3815 if (sin->sin_addr.s_addr == 0) { 3816 /* Invalid address */ 3817 return (-1); 3818 } 3819 /* zero out the bzero area */ 3820 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3821 3822 /* assure len is set */ 3823 sin->sin_len = sizeof(struct sockaddr_in); 3824 if (set_scope) { 3825 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3826 stcb->asoc.scope.ipv4_local_scope = 1; 3827 } 3828 } else { 3829 /* Validate the address is in scope */ 3830 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3831 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3832 addr_inscope = 0; 3833 } 3834 } 3835 break; 3836 } 3837 #endif 3838 #ifdef INET6 3839 case AF_INET6: 3840 { 3841 struct sockaddr_in6 *sin6; 3842 3843 sin6 = (struct sockaddr_in6 *)newaddr; 3844 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3845 /* Invalid address */ 3846 return (-1); 3847 } 3848 /* assure len is set */ 3849 sin6->sin6_len = sizeof(struct sockaddr_in6); 3850 if (set_scope) { 3851 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3852 stcb->asoc.scope.loopback_scope = 1; 3853 stcb->asoc.scope.local_scope = 0; 3854 stcb->asoc.scope.ipv4_local_scope = 1; 3855 stcb->asoc.scope.site_scope = 1; 3856 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3857 /* 3858 * If the new destination is a 3859 * LINK_LOCAL we must have common 3860 * site scope. Don't set the local 3861 * scope since we may not share all 3862 * links, only loopback can do this. 3863 * Links on the local network would 3864 * also be on our private network 3865 * for v4 too. 3866 */ 3867 stcb->asoc.scope.ipv4_local_scope = 1; 3868 stcb->asoc.scope.site_scope = 1; 3869 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3870 /* 3871 * If the new destination is 3872 * SITE_LOCAL then we must have site 3873 * scope in common. 3874 */ 3875 stcb->asoc.scope.site_scope = 1; 3876 } 3877 } else { 3878 /* Validate the address is in scope */ 3879 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3880 (stcb->asoc.scope.loopback_scope == 0)) { 3881 addr_inscope = 0; 3882 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3883 (stcb->asoc.scope.local_scope == 0)) { 3884 addr_inscope = 0; 3885 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3886 (stcb->asoc.scope.site_scope == 0)) { 3887 addr_inscope = 0; 3888 } 3889 } 3890 break; 3891 } 3892 #endif 3893 default: 3894 /* not supported family type */ 3895 return (-1); 3896 } 3897 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3898 if (net == NULL) { 3899 return (-1); 3900 } 3901 SCTP_INCR_RADDR_COUNT(); 3902 bzero(net, sizeof(struct sctp_nets)); 3903 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3904 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3905 switch (newaddr->sa_family) { 3906 #ifdef INET 3907 case AF_INET: 3908 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3909 break; 3910 #endif 3911 #ifdef INET6 3912 case AF_INET6: 3913 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3914 break; 3915 #endif 3916 default: 3917 break; 3918 } 3919 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3920 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3921 stcb->asoc.scope.loopback_scope = 1; 3922 stcb->asoc.scope.ipv4_local_scope = 1; 3923 stcb->asoc.scope.local_scope = 0; 3924 stcb->asoc.scope.site_scope = 1; 3925 addr_inscope = 1; 3926 } 3927 net->failure_threshold = stcb->asoc.def_net_failure; 3928 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3929 if (addr_inscope == 0) { 3930 net->dest_state = (SCTP_ADDR_REACHABLE | 3931 SCTP_ADDR_OUT_OF_SCOPE); 3932 } else { 3933 if (from == SCTP_ADDR_IS_CONFIRMED) 3934 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3935 net->dest_state = SCTP_ADDR_REACHABLE; 3936 else 3937 net->dest_state = SCTP_ADDR_REACHABLE | 3938 SCTP_ADDR_UNCONFIRMED; 3939 } 3940 /* 3941 * We set this to 0, the timer code knows that this means its an 3942 * initial value 3943 */ 3944 net->rto_needed = 1; 3945 net->RTO = 0; 3946 net->RTO_measured = 0; 3947 stcb->asoc.numnets++; 3948 net->ref_count = 1; 3949 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3950 net->port = stcb->asoc.port; 3951 net->dscp = stcb->asoc.default_dscp; 3952 #ifdef INET6 3953 net->flowlabel = stcb->asoc.default_flowlabel; 3954 #endif 3955 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3956 net->dest_state |= SCTP_ADDR_NOHB; 3957 } else { 3958 net->dest_state &= ~SCTP_ADDR_NOHB; 3959 } 3960 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3961 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3962 } else { 3963 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3964 } 3965 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3966 /* Init the timer structure */ 3967 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3968 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3969 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3970 3971 /* Now generate a route for this guy */ 3972 #ifdef INET6 3973 /* KAME hack: embed scopeid */ 3974 if (newaddr->sa_family == AF_INET6) { 3975 struct sockaddr_in6 *sin6; 3976 3977 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3978 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3979 sin6->sin6_scope_id = 0; 3980 } 3981 #endif 3982 SCTP_RTALLOC((sctp_route_t *) & net->ro, 3983 stcb->asoc.vrf_id, 3984 stcb->sctp_ep->fibnum); 3985 3986 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3987 /* Get source address */ 3988 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3989 stcb, 3990 (sctp_route_t *) & net->ro, 3991 net, 3992 0, 3993 stcb->asoc.vrf_id); 3994 if (net->ro._s_addr != NULL) { 3995 net->src_addr_selected = 1; 3996 /* Now get the interface MTU */ 3997 if (net->ro._s_addr->ifn_p != NULL) { 3998 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3999 } 4000 } else { 4001 net->src_addr_selected = 0; 4002 } 4003 if (net->mtu > 0) { 4004 uint32_t rmtu; 4005 4006 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 4007 if (rmtu == 0) { 4008 /* 4009 * Start things off to match mtu of 4010 * interface please. 4011 */ 4012 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 4013 net->ro.ro_rt, net->mtu); 4014 } else { 4015 /* 4016 * we take the route mtu over the interface, 4017 * since the route may be leading out the 4018 * loopback, or a different interface. 4019 */ 4020 net->mtu = rmtu; 4021 } 4022 } 4023 } else { 4024 net->src_addr_selected = 0; 4025 } 4026 if (net->mtu == 0) { 4027 switch (newaddr->sa_family) { 4028 #ifdef INET 4029 case AF_INET: 4030 net->mtu = SCTP_DEFAULT_MTU; 4031 break; 4032 #endif 4033 #ifdef INET6 4034 case AF_INET6: 4035 net->mtu = 1280; 4036 break; 4037 #endif 4038 default: 4039 break; 4040 } 4041 } 4042 #if defined(INET) || defined(INET6) 4043 if (net->port) { 4044 net->mtu -= (uint32_t) sizeof(struct udphdr); 4045 } 4046 #endif 4047 if (from == SCTP_ALLOC_ASOC) { 4048 stcb->asoc.smallest_mtu = net->mtu; 4049 } 4050 if (stcb->asoc.smallest_mtu > net->mtu) { 4051 stcb->asoc.smallest_mtu = net->mtu; 4052 } 4053 #ifdef INET6 4054 if (newaddr->sa_family == AF_INET6) { 4055 struct sockaddr_in6 *sin6; 4056 4057 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4058 (void)sa6_recoverscope(sin6); 4059 } 4060 #endif 4061 4062 /* JRS - Use the congestion control given in the CC module */ 4063 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4064 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4065 4066 /* 4067 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4068 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4069 */ 4070 net->find_pseudo_cumack = 1; 4071 net->find_rtx_pseudo_cumack = 1; 4072 /* Choose an initial flowid. */ 4073 net->flowid = stcb->asoc.my_vtag ^ 4074 ntohs(stcb->rport) ^ 4075 ntohs(stcb->sctp_ep->sctp_lport); 4076 net->flowtype = M_HASHTYPE_OPAQUE; 4077 if (netp) { 4078 *netp = net; 4079 } 4080 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4081 if (net->ro.ro_rt == NULL) { 4082 /* Since we have no route put it at the back */ 4083 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4084 } else if (netfirst == NULL) { 4085 /* We are the first one in the pool. */ 4086 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4087 } else if (netfirst->ro.ro_rt == NULL) { 4088 /* 4089 * First one has NO route. Place this one ahead of the first 4090 * one. 4091 */ 4092 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4093 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4094 /* 4095 * This one has a different interface than the one at the 4096 * top of the list. Place it ahead. 4097 */ 4098 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4099 } else { 4100 /* 4101 * Ok we have the same interface as the first one. Move 4102 * forward until we find either a) one with a NULL route... 4103 * insert ahead of that b) one with a different ifp.. insert 4104 * after that. c) end of the list.. insert at the tail. 4105 */ 4106 struct sctp_nets *netlook; 4107 4108 do { 4109 netlook = TAILQ_NEXT(netfirst, sctp_next); 4110 if (netlook == NULL) { 4111 /* End of the list */ 4112 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4113 break; 4114 } else if (netlook->ro.ro_rt == NULL) { 4115 /* next one has NO route */ 4116 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4117 break; 4118 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4119 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4120 net, sctp_next); 4121 break; 4122 } 4123 /* Shift forward */ 4124 netfirst = netlook; 4125 } while (netlook != NULL); 4126 } 4127 4128 /* got to have a primary set */ 4129 if (stcb->asoc.primary_destination == 0) { 4130 stcb->asoc.primary_destination = net; 4131 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4132 (net->ro.ro_rt) && 4133 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4134 /* No route to current primary adopt new primary */ 4135 stcb->asoc.primary_destination = net; 4136 } 4137 /* Validate primary is first */ 4138 net = TAILQ_FIRST(&stcb->asoc.nets); 4139 if ((net != stcb->asoc.primary_destination) && 4140 (stcb->asoc.primary_destination)) { 4141 /* 4142 * first one on the list is NOT the primary sctp_cmpaddr() 4143 * is much more efficient if the primary is the first on the 4144 * list, make it so. 4145 */ 4146 TAILQ_REMOVE(&stcb->asoc.nets, 4147 stcb->asoc.primary_destination, sctp_next); 4148 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4149 stcb->asoc.primary_destination, sctp_next); 4150 } 4151 return (0); 4152 } 4153 4154 4155 static uint32_t 4156 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4157 { 4158 uint32_t id; 4159 struct sctpasochead *head; 4160 struct sctp_tcb *lstcb; 4161 4162 SCTP_INP_WLOCK(inp); 4163 try_again: 4164 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4165 /* TSNH */ 4166 SCTP_INP_WUNLOCK(inp); 4167 return (0); 4168 } 4169 /* 4170 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4171 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4172 */ 4173 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4174 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4175 } 4176 id = inp->sctp_associd_counter; 4177 inp->sctp_associd_counter++; 4178 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4179 if (lstcb) { 4180 goto try_again; 4181 } 4182 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4183 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4184 stcb->asoc.in_asocid_hash = 1; 4185 SCTP_INP_WUNLOCK(inp); 4186 return id; 4187 } 4188 4189 /* 4190 * allocate an association and add it to the endpoint. The caller must be 4191 * careful to add all additional addresses once they are know right away or 4192 * else the assoc will be may experience a blackout scenario. 4193 */ 4194 struct sctp_tcb * 4195 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4196 int *error, uint32_t override_tag, uint32_t vrf_id, 4197 uint16_t o_streams, 4198 struct thread *p 4199 ) 4200 { 4201 /* note the p argument is only valid in unbound sockets */ 4202 4203 struct sctp_tcb *stcb; 4204 struct sctp_association *asoc; 4205 struct sctpasochead *head; 4206 uint16_t rport; 4207 int err; 4208 4209 /* 4210 * Assumption made here: Caller has done a 4211 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4212 * address does not exist already. 4213 */ 4214 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4215 /* Hit max assoc, sorry no more */ 4216 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4217 *error = ENOBUFS; 4218 return (NULL); 4219 } 4220 if (firstaddr == NULL) { 4221 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4222 *error = EINVAL; 4223 return (NULL); 4224 } 4225 SCTP_INP_RLOCK(inp); 4226 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4227 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4228 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4229 /* 4230 * If its in the TCP pool, its NOT allowed to create an 4231 * association. The parent listener needs to call 4232 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4233 * off, or connected one does this.. its an error. 4234 */ 4235 SCTP_INP_RUNLOCK(inp); 4236 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4237 *error = EINVAL; 4238 return (NULL); 4239 } 4240 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4241 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4242 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4243 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4244 SCTP_INP_RUNLOCK(inp); 4245 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4246 *error = EINVAL; 4247 return (NULL); 4248 } 4249 } 4250 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4251 #ifdef SCTP_DEBUG 4252 if (firstaddr) { 4253 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4254 switch (firstaddr->sa_family) { 4255 #ifdef INET 4256 case AF_INET: 4257 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4258 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4259 break; 4260 #endif 4261 #ifdef INET6 4262 case AF_INET6: 4263 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4264 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4265 break; 4266 #endif 4267 default: 4268 break; 4269 } 4270 } else { 4271 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4272 } 4273 #endif /* SCTP_DEBUG */ 4274 switch (firstaddr->sa_family) { 4275 #ifdef INET 4276 case AF_INET: 4277 { 4278 struct sockaddr_in *sin; 4279 4280 sin = (struct sockaddr_in *)firstaddr; 4281 if ((ntohs(sin->sin_port) == 0) || 4282 (sin->sin_addr.s_addr == INADDR_ANY) || 4283 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4284 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4285 /* Invalid address */ 4286 SCTP_INP_RUNLOCK(inp); 4287 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4288 *error = EINVAL; 4289 return (NULL); 4290 } 4291 rport = sin->sin_port; 4292 break; 4293 } 4294 #endif 4295 #ifdef INET6 4296 case AF_INET6: 4297 { 4298 struct sockaddr_in6 *sin6; 4299 4300 sin6 = (struct sockaddr_in6 *)firstaddr; 4301 if ((ntohs(sin6->sin6_port) == 0) || 4302 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4303 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4304 /* Invalid address */ 4305 SCTP_INP_RUNLOCK(inp); 4306 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4307 *error = EINVAL; 4308 return (NULL); 4309 } 4310 rport = sin6->sin6_port; 4311 break; 4312 } 4313 #endif 4314 default: 4315 /* not supported family type */ 4316 SCTP_INP_RUNLOCK(inp); 4317 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4318 *error = EINVAL; 4319 return (NULL); 4320 } 4321 SCTP_INP_RUNLOCK(inp); 4322 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4323 /* 4324 * If you have not performed a bind, then we need to do the 4325 * ephemeral bind for you. 4326 */ 4327 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4328 (struct sockaddr *)NULL, 4329 (struct sctp_ifa *)NULL, 4330 p 4331 ))) { 4332 /* bind error, probably perm */ 4333 *error = err; 4334 return (NULL); 4335 } 4336 } 4337 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4338 if (stcb == NULL) { 4339 /* out of memory? */ 4340 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4341 *error = ENOMEM; 4342 return (NULL); 4343 } 4344 SCTP_INCR_ASOC_COUNT(); 4345 4346 bzero(stcb, sizeof(*stcb)); 4347 asoc = &stcb->asoc; 4348 4349 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4350 SCTP_TCB_LOCK_INIT(stcb); 4351 SCTP_TCB_SEND_LOCK_INIT(stcb); 4352 stcb->rport = rport; 4353 /* setup back pointer's */ 4354 stcb->sctp_ep = inp; 4355 stcb->sctp_socket = inp->sctp_socket; 4356 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id, o_streams))) { 4357 /* failed */ 4358 SCTP_TCB_LOCK_DESTROY(stcb); 4359 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4360 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4361 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4362 SCTP_DECR_ASOC_COUNT(); 4363 *error = err; 4364 return (NULL); 4365 } 4366 /* and the port */ 4367 SCTP_INP_INFO_WLOCK(); 4368 SCTP_INP_WLOCK(inp); 4369 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4370 /* inpcb freed while alloc going on */ 4371 SCTP_TCB_LOCK_DESTROY(stcb); 4372 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4373 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4374 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4375 SCTP_INP_WUNLOCK(inp); 4376 SCTP_INP_INFO_WUNLOCK(); 4377 SCTP_DECR_ASOC_COUNT(); 4378 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4379 *error = EINVAL; 4380 return (NULL); 4381 } 4382 SCTP_TCB_LOCK(stcb); 4383 4384 /* now that my_vtag is set, add it to the hash */ 4385 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4386 /* put it in the bucket in the vtag hash of assoc's for the system */ 4387 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4388 SCTP_INP_INFO_WUNLOCK(); 4389 4390 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4391 /* failure.. memory error? */ 4392 if (asoc->strmout) { 4393 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4394 asoc->strmout = NULL; 4395 } 4396 if (asoc->mapping_array) { 4397 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4398 asoc->mapping_array = NULL; 4399 } 4400 if (asoc->nr_mapping_array) { 4401 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4402 asoc->nr_mapping_array = NULL; 4403 } 4404 SCTP_DECR_ASOC_COUNT(); 4405 SCTP_TCB_UNLOCK(stcb); 4406 SCTP_TCB_LOCK_DESTROY(stcb); 4407 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4408 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4409 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4410 SCTP_INP_WUNLOCK(inp); 4411 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4412 *error = ENOBUFS; 4413 return (NULL); 4414 } 4415 /* Init all the timers */ 4416 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4417 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4418 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4419 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4420 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4421 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4422 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4423 4424 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4425 /* now file the port under the hash as well */ 4426 if (inp->sctp_tcbhash != NULL) { 4427 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4428 inp->sctp_hashmark)]; 4429 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4430 } 4431 SCTP_INP_WUNLOCK(inp); 4432 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4433 return (stcb); 4434 } 4435 4436 4437 void 4438 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4439 { 4440 struct sctp_association *asoc; 4441 4442 asoc = &stcb->asoc; 4443 asoc->numnets--; 4444 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4445 if (net == asoc->primary_destination) { 4446 /* Reset primary */ 4447 struct sctp_nets *lnet; 4448 4449 lnet = TAILQ_FIRST(&asoc->nets); 4450 /* 4451 * Mobility adaptation Ideally, if deleted destination is 4452 * the primary, it becomes a fast retransmission trigger by 4453 * the subsequent SET PRIMARY. (by micchie) 4454 */ 4455 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4456 SCTP_MOBILITY_BASE) || 4457 sctp_is_mobility_feature_on(stcb->sctp_ep, 4458 SCTP_MOBILITY_FASTHANDOFF)) { 4459 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4460 if (asoc->deleted_primary != NULL) { 4461 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4462 goto out; 4463 } 4464 asoc->deleted_primary = net; 4465 atomic_add_int(&net->ref_count, 1); 4466 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4467 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4468 sctp_mobility_feature_on(stcb->sctp_ep, 4469 SCTP_MOBILITY_PRIM_DELETED); 4470 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4471 stcb->sctp_ep, stcb, NULL); 4472 } 4473 out: 4474 /* Try to find a confirmed primary */ 4475 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4476 } 4477 if (net == asoc->last_data_chunk_from) { 4478 /* Reset primary */ 4479 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4480 } 4481 if (net == asoc->last_control_chunk_from) { 4482 /* Clear net */ 4483 asoc->last_control_chunk_from = NULL; 4484 } 4485 if (net == stcb->asoc.alternate) { 4486 sctp_free_remote_addr(stcb->asoc.alternate); 4487 stcb->asoc.alternate = NULL; 4488 } 4489 sctp_free_remote_addr(net); 4490 } 4491 4492 /* 4493 * remove a remote endpoint address from an association, it will fail if the 4494 * address does not exist. 4495 */ 4496 int 4497 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4498 { 4499 /* 4500 * Here we need to remove a remote address. This is quite simple, we 4501 * first find it in the list of address for the association 4502 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4503 * on that item. Note we do not allow it to be removed if there are 4504 * no other addresses. 4505 */ 4506 struct sctp_association *asoc; 4507 struct sctp_nets *net, *nnet; 4508 4509 asoc = &stcb->asoc; 4510 4511 /* locate the address */ 4512 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4513 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4514 continue; 4515 } 4516 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4517 remaddr)) { 4518 /* we found the guy */ 4519 if (asoc->numnets < 2) { 4520 /* Must have at LEAST two remote addresses */ 4521 return (-1); 4522 } else { 4523 sctp_remove_net(stcb, net); 4524 return (0); 4525 } 4526 } 4527 } 4528 /* not found. */ 4529 return (-2); 4530 } 4531 4532 void 4533 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4534 { 4535 struct sctpvtaghead *chain; 4536 struct sctp_tagblock *twait_block; 4537 int found = 0; 4538 int i; 4539 4540 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4541 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4542 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4543 if ((twait_block->vtag_block[i].v_tag == tag) && 4544 (twait_block->vtag_block[i].lport == lport) && 4545 (twait_block->vtag_block[i].rport == rport)) { 4546 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4547 twait_block->vtag_block[i].v_tag = 0; 4548 twait_block->vtag_block[i].lport = 0; 4549 twait_block->vtag_block[i].rport = 0; 4550 found = 1; 4551 break; 4552 } 4553 } 4554 if (found) 4555 break; 4556 } 4557 } 4558 4559 int 4560 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4561 { 4562 struct sctpvtaghead *chain; 4563 struct sctp_tagblock *twait_block; 4564 int found = 0; 4565 int i; 4566 4567 SCTP_INP_INFO_WLOCK(); 4568 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4569 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4570 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4571 if ((twait_block->vtag_block[i].v_tag == tag) && 4572 (twait_block->vtag_block[i].lport == lport) && 4573 (twait_block->vtag_block[i].rport == rport)) { 4574 found = 1; 4575 break; 4576 } 4577 } 4578 if (found) 4579 break; 4580 } 4581 SCTP_INP_INFO_WUNLOCK(); 4582 return (found); 4583 } 4584 4585 4586 void 4587 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4588 { 4589 struct sctpvtaghead *chain; 4590 struct sctp_tagblock *twait_block; 4591 struct timeval now; 4592 int set, i; 4593 4594 if (time == 0) { 4595 /* Its disabled */ 4596 return; 4597 } 4598 (void)SCTP_GETTIME_TIMEVAL(&now); 4599 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4600 set = 0; 4601 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4602 /* Block(s) present, lets find space, and expire on the fly */ 4603 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4604 if ((twait_block->vtag_block[i].v_tag == 0) && 4605 !set) { 4606 twait_block->vtag_block[i].tv_sec_at_expire = 4607 now.tv_sec + time; 4608 twait_block->vtag_block[i].v_tag = tag; 4609 twait_block->vtag_block[i].lport = lport; 4610 twait_block->vtag_block[i].rport = rport; 4611 set = 1; 4612 } else if ((twait_block->vtag_block[i].v_tag) && 4613 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4614 /* Audit expires this guy */ 4615 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4616 twait_block->vtag_block[i].v_tag = 0; 4617 twait_block->vtag_block[i].lport = 0; 4618 twait_block->vtag_block[i].rport = 0; 4619 if (set == 0) { 4620 /* Reuse it for my new tag */ 4621 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4622 twait_block->vtag_block[i].v_tag = tag; 4623 twait_block->vtag_block[i].lport = lport; 4624 twait_block->vtag_block[i].rport = rport; 4625 set = 1; 4626 } 4627 } 4628 } 4629 if (set) { 4630 /* 4631 * We only do up to the block where we can place our 4632 * tag for audits 4633 */ 4634 break; 4635 } 4636 } 4637 /* Need to add a new block to chain */ 4638 if (!set) { 4639 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4640 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4641 if (twait_block == NULL) { 4642 #ifdef INVARIANTS 4643 panic("Can not alloc tagblock"); 4644 #endif 4645 return; 4646 } 4647 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4648 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4649 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4650 twait_block->vtag_block[0].v_tag = tag; 4651 twait_block->vtag_block[0].lport = lport; 4652 twait_block->vtag_block[0].rport = rport; 4653 } 4654 } 4655 4656 4657 4658 /*- 4659 * Free the association after un-hashing the remote port. This 4660 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4661 * expect that the input to this function IS a locked TCB. 4662 * It will return 0, if it did NOT destroy the association (instead 4663 * it unlocks it. It will return NON-zero if it either destroyed the 4664 * association OR the association is already destroyed. 4665 */ 4666 int 4667 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4668 { 4669 int i; 4670 struct sctp_association *asoc; 4671 struct sctp_nets *net, *nnet; 4672 struct sctp_laddr *laddr, *naddr; 4673 struct sctp_tmit_chunk *chk, *nchk; 4674 struct sctp_asconf_addr *aparam, *naparam; 4675 struct sctp_asconf_ack *aack, *naack; 4676 struct sctp_stream_reset_list *strrst, *nstrrst; 4677 struct sctp_queued_to_read *sq, *nsq; 4678 struct sctp_stream_queue_pending *sp, *nsp; 4679 sctp_sharedkey_t *shared_key, *nshared_key; 4680 struct socket *so; 4681 4682 /* first, lets purge the entry from the hash table. */ 4683 4684 #ifdef SCTP_LOG_CLOSING 4685 sctp_log_closing(inp, stcb, 6); 4686 #endif 4687 if (stcb->asoc.state == 0) { 4688 #ifdef SCTP_LOG_CLOSING 4689 sctp_log_closing(inp, NULL, 7); 4690 #endif 4691 /* there is no asoc, really TSNH :-0 */ 4692 return (1); 4693 } 4694 if (stcb->asoc.alternate) { 4695 sctp_free_remote_addr(stcb->asoc.alternate); 4696 stcb->asoc.alternate = NULL; 4697 } 4698 /* TEMP CODE */ 4699 if (stcb->freed_from_where == 0) { 4700 /* Only record the first place free happened from */ 4701 stcb->freed_from_where = from_location; 4702 } 4703 /* TEMP CODE */ 4704 4705 asoc = &stcb->asoc; 4706 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4707 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4708 /* nothing around */ 4709 so = NULL; 4710 else 4711 so = inp->sctp_socket; 4712 4713 /* 4714 * We used timer based freeing if a reader or writer is in the way. 4715 * So we first check if we are actually being called from a timer, 4716 * if so we abort early if a reader or writer is still in the way. 4717 */ 4718 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4719 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4720 /* 4721 * is it the timer driving us? if so are the reader/writers 4722 * gone? 4723 */ 4724 if (stcb->asoc.refcnt) { 4725 /* nope, reader or writer in the way */ 4726 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4727 /* no asoc destroyed */ 4728 SCTP_TCB_UNLOCK(stcb); 4729 #ifdef SCTP_LOG_CLOSING 4730 sctp_log_closing(inp, stcb, 8); 4731 #endif 4732 return (0); 4733 } 4734 } 4735 /* now clean up any other timers */ 4736 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4737 asoc->dack_timer.self = NULL; 4738 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4739 /*- 4740 * For stream reset we don't blast this unless 4741 * it is a str-reset timer, it might be the 4742 * free-asoc timer which we DON'T want to 4743 * disturb. 4744 */ 4745 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4746 asoc->strreset_timer.self = NULL; 4747 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4748 asoc->asconf_timer.self = NULL; 4749 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4750 asoc->autoclose_timer.self = NULL; 4751 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4752 asoc->shut_guard_timer.self = NULL; 4753 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4754 asoc->delayed_event_timer.self = NULL; 4755 /* Mobility adaptation */ 4756 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4757 asoc->delete_prim_timer.self = NULL; 4758 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4759 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4760 net->rxt_timer.self = NULL; 4761 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4762 net->pmtu_timer.self = NULL; 4763 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4764 net->hb_timer.self = NULL; 4765 } 4766 /* Now the read queue needs to be cleaned up (only once) */ 4767 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4768 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4769 SCTP_INP_READ_LOCK(inp); 4770 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4771 if (sq->stcb == stcb) { 4772 sq->do_not_ref_stcb = 1; 4773 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4774 /* 4775 * If there is no end, there never will be 4776 * now. 4777 */ 4778 if (sq->end_added == 0) { 4779 /* Held for PD-API clear that. */ 4780 sq->pdapi_aborted = 1; 4781 sq->held_length = 0; 4782 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4783 /* 4784 * Need to add a PD-API 4785 * aborted indication. 4786 * Setting the control_pdapi 4787 * assures that it will be 4788 * added right after this 4789 * msg. 4790 */ 4791 uint32_t strseq; 4792 4793 stcb->asoc.control_pdapi = sq; 4794 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4795 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4796 stcb, 4797 SCTP_PARTIAL_DELIVERY_ABORTED, 4798 (void *)&strseq, 4799 SCTP_SO_LOCKED); 4800 stcb->asoc.control_pdapi = NULL; 4801 } 4802 } 4803 /* Add an end to wake them */ 4804 sq->end_added = 1; 4805 } 4806 } 4807 SCTP_INP_READ_UNLOCK(inp); 4808 if (stcb->block_entry) { 4809 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4810 stcb->block_entry->error = ECONNRESET; 4811 stcb->block_entry = NULL; 4812 } 4813 } 4814 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4815 /* 4816 * Someone holds a reference OR the socket is unaccepted 4817 * yet. 4818 */ 4819 if ((stcb->asoc.refcnt) || 4820 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4821 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4822 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4823 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4824 } 4825 SCTP_TCB_UNLOCK(stcb); 4826 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4827 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4828 /* nothing around */ 4829 so = NULL; 4830 if (so) { 4831 /* Wake any reader/writers */ 4832 sctp_sorwakeup(inp, so); 4833 sctp_sowwakeup(inp, so); 4834 } 4835 #ifdef SCTP_LOG_CLOSING 4836 sctp_log_closing(inp, stcb, 9); 4837 #endif 4838 /* no asoc destroyed */ 4839 return (0); 4840 } 4841 #ifdef SCTP_LOG_CLOSING 4842 sctp_log_closing(inp, stcb, 10); 4843 #endif 4844 /* 4845 * When I reach here, no others want to kill the assoc yet.. and I 4846 * own the lock. Now its possible an abort comes in when I do the 4847 * lock exchange below to grab all the locks to do the final take 4848 * out. to prevent this we increment the count, which will start a 4849 * timer and blow out above thus assuring us that we hold exclusive 4850 * killing of the asoc. Note that after getting back the TCB lock we 4851 * will go ahead and increment the counter back up and stop any 4852 * timer a passing stranger may have started :-S 4853 */ 4854 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4855 atomic_add_int(&stcb->asoc.refcnt, 1); 4856 4857 SCTP_TCB_UNLOCK(stcb); 4858 SCTP_INP_INFO_WLOCK(); 4859 SCTP_INP_WLOCK(inp); 4860 SCTP_TCB_LOCK(stcb); 4861 } 4862 /* Double check the GONE flag */ 4863 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4864 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4865 /* nothing around */ 4866 so = NULL; 4867 4868 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4869 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4870 /* 4871 * For TCP type we need special handling when we are 4872 * connected. We also include the peel'ed off ones to. 4873 */ 4874 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4875 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4876 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4877 if (so) { 4878 SOCK_LOCK(so); 4879 if (so->so_rcv.sb_cc == 0) { 4880 so->so_state &= ~(SS_ISCONNECTING | 4881 SS_ISDISCONNECTING | 4882 SS_ISCONFIRMING | 4883 SS_ISCONNECTED); 4884 } 4885 socantrcvmore_locked(so); 4886 sctp_sowwakeup(inp, so); 4887 sctp_sorwakeup(inp, so); 4888 SCTP_SOWAKEUP(so); 4889 } 4890 } 4891 } 4892 /* 4893 * Make it invalid too, that way if its about to run it will abort 4894 * and return. 4895 */ 4896 /* re-increment the lock */ 4897 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4898 atomic_add_int(&stcb->asoc.refcnt, -1); 4899 } 4900 if (stcb->asoc.refcnt) { 4901 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4902 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4903 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4904 SCTP_INP_INFO_WUNLOCK(); 4905 SCTP_INP_WUNLOCK(inp); 4906 } 4907 SCTP_TCB_UNLOCK(stcb); 4908 return (0); 4909 } 4910 asoc->state = 0; 4911 if (inp->sctp_tcbhash) { 4912 LIST_REMOVE(stcb, sctp_tcbhash); 4913 } 4914 if (stcb->asoc.in_asocid_hash) { 4915 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4916 } 4917 /* Now lets remove it from the list of ALL associations in the EP */ 4918 LIST_REMOVE(stcb, sctp_tcblist); 4919 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4920 SCTP_INP_INCR_REF(inp); 4921 SCTP_INP_WUNLOCK(inp); 4922 } 4923 /* pull from vtag hash */ 4924 LIST_REMOVE(stcb, sctp_asocs); 4925 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4926 inp->sctp_lport, stcb->rport); 4927 4928 /* 4929 * Now restop the timers to be sure this is paranoia at is finest! 4930 */ 4931 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4932 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4933 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4934 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4935 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4936 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4937 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4938 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4939 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4940 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4941 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4942 } 4943 4944 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4945 /* 4946 * The chunk lists and such SHOULD be empty but we check them just 4947 * in case. 4948 */ 4949 /* anything on the wheel needs to be removed */ 4950 for (i = 0; i < asoc->streamoutcnt; i++) { 4951 struct sctp_stream_out *outs; 4952 4953 outs = &asoc->strmout[i]; 4954 /* now clean up any chunks here */ 4955 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4956 TAILQ_REMOVE(&outs->outqueue, sp, next); 4957 sctp_free_spbufspace(stcb, asoc, sp); 4958 if (sp->data) { 4959 if (so) { 4960 /* Still an open socket - report */ 4961 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4962 0, (void *)sp, SCTP_SO_LOCKED); 4963 } 4964 if (sp->data) { 4965 sctp_m_freem(sp->data); 4966 sp->data = NULL; 4967 sp->tail_mbuf = NULL; 4968 sp->length = 0; 4969 } 4970 } 4971 if (sp->net) { 4972 sctp_free_remote_addr(sp->net); 4973 sp->net = NULL; 4974 } 4975 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4976 } 4977 } 4978 /* sa_ignore FREED_MEMORY */ 4979 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4980 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4981 SCTP_FREE(strrst, SCTP_M_STRESET); 4982 } 4983 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4984 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4985 if (sq->data) { 4986 sctp_m_freem(sq->data); 4987 sq->data = NULL; 4988 } 4989 sctp_free_remote_addr(sq->whoFrom); 4990 sq->whoFrom = NULL; 4991 sq->stcb = NULL; 4992 /* Free the ctl entry */ 4993 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4994 SCTP_DECR_READQ_COUNT(); 4995 /* sa_ignore FREED_MEMORY */ 4996 } 4997 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4998 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4999 if (chk->data) { 5000 sctp_m_freem(chk->data); 5001 chk->data = NULL; 5002 } 5003 if (chk->holds_key_ref) 5004 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5005 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5006 SCTP_DECR_CHK_COUNT(); 5007 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 5008 asoc->free_chunk_cnt--; 5009 /* sa_ignore FREED_MEMORY */ 5010 } 5011 /* pending send queue SHOULD be empty */ 5012 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 5013 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5014 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5015 #ifdef INVARIANTS 5016 } else { 5017 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5018 #endif 5019 } 5020 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5021 if (chk->data) { 5022 if (so) { 5023 /* Still a socket? */ 5024 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5025 0, chk, SCTP_SO_LOCKED); 5026 } 5027 if (chk->data) { 5028 sctp_m_freem(chk->data); 5029 chk->data = NULL; 5030 } 5031 } 5032 if (chk->holds_key_ref) 5033 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5034 if (chk->whoTo) { 5035 sctp_free_remote_addr(chk->whoTo); 5036 chk->whoTo = NULL; 5037 } 5038 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5039 SCTP_DECR_CHK_COUNT(); 5040 /* sa_ignore FREED_MEMORY */ 5041 } 5042 /* sent queue SHOULD be empty */ 5043 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5044 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5045 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5046 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5047 #ifdef INVARIANTS 5048 } else { 5049 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5050 #endif 5051 } 5052 } 5053 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5054 if (chk->data) { 5055 if (so) { 5056 /* Still a socket? */ 5057 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5058 0, chk, SCTP_SO_LOCKED); 5059 } 5060 if (chk->data) { 5061 sctp_m_freem(chk->data); 5062 chk->data = NULL; 5063 } 5064 } 5065 if (chk->holds_key_ref) 5066 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5067 sctp_free_remote_addr(chk->whoTo); 5068 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5069 SCTP_DECR_CHK_COUNT(); 5070 /* sa_ignore FREED_MEMORY */ 5071 } 5072 #ifdef INVARIANTS 5073 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5074 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5075 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5076 } 5077 } 5078 #endif 5079 /* control queue MAY not be empty */ 5080 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5081 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5082 if (chk->data) { 5083 sctp_m_freem(chk->data); 5084 chk->data = NULL; 5085 } 5086 if (chk->holds_key_ref) 5087 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5088 sctp_free_remote_addr(chk->whoTo); 5089 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5090 SCTP_DECR_CHK_COUNT(); 5091 /* sa_ignore FREED_MEMORY */ 5092 } 5093 /* ASCONF queue MAY not be empty */ 5094 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5095 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5096 if (chk->data) { 5097 sctp_m_freem(chk->data); 5098 chk->data = NULL; 5099 } 5100 if (chk->holds_key_ref) 5101 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5102 sctp_free_remote_addr(chk->whoTo); 5103 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5104 SCTP_DECR_CHK_COUNT(); 5105 /* sa_ignore FREED_MEMORY */ 5106 } 5107 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5108 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5109 if (chk->data) { 5110 sctp_m_freem(chk->data); 5111 chk->data = NULL; 5112 } 5113 if (chk->holds_key_ref) 5114 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5115 sctp_free_remote_addr(chk->whoTo); 5116 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5117 SCTP_DECR_CHK_COUNT(); 5118 /* sa_ignore FREED_MEMORY */ 5119 } 5120 5121 if (asoc->mapping_array) { 5122 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5123 asoc->mapping_array = NULL; 5124 } 5125 if (asoc->nr_mapping_array) { 5126 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5127 asoc->nr_mapping_array = NULL; 5128 } 5129 /* the stream outs */ 5130 if (asoc->strmout) { 5131 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5132 asoc->strmout = NULL; 5133 } 5134 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5135 if (asoc->strmin) { 5136 struct sctp_queued_to_read *ctl, *nctl; 5137 5138 for (i = 0; i < asoc->streamincnt; i++) { 5139 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5140 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5141 sctp_free_remote_addr(ctl->whoFrom); 5142 if (ctl->data) { 5143 sctp_m_freem(ctl->data); 5144 ctl->data = NULL; 5145 } 5146 /* 5147 * We don't free the address here since all 5148 * the net's were freed above. 5149 */ 5150 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5151 SCTP_DECR_READQ_COUNT(); 5152 } 5153 } 5154 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5155 asoc->strmin = NULL; 5156 } 5157 asoc->streamincnt = 0; 5158 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5159 #ifdef INVARIANTS 5160 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5161 panic("no net's left alloc'ed, or list points to itself"); 5162 } 5163 #endif 5164 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5165 sctp_free_remote_addr(net); 5166 } 5167 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5168 /* sa_ignore FREED_MEMORY */ 5169 sctp_remove_laddr(laddr); 5170 } 5171 5172 /* pending asconf (address) parameters */ 5173 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5174 /* sa_ignore FREED_MEMORY */ 5175 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5176 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5177 } 5178 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5179 /* sa_ignore FREED_MEMORY */ 5180 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5181 if (aack->data != NULL) { 5182 sctp_m_freem(aack->data); 5183 } 5184 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5185 } 5186 /* clean up auth stuff */ 5187 if (asoc->local_hmacs) 5188 sctp_free_hmaclist(asoc->local_hmacs); 5189 if (asoc->peer_hmacs) 5190 sctp_free_hmaclist(asoc->peer_hmacs); 5191 5192 if (asoc->local_auth_chunks) 5193 sctp_free_chunklist(asoc->local_auth_chunks); 5194 if (asoc->peer_auth_chunks) 5195 sctp_free_chunklist(asoc->peer_auth_chunks); 5196 5197 sctp_free_authinfo(&asoc->authinfo); 5198 5199 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5200 LIST_REMOVE(shared_key, next); 5201 sctp_free_sharedkey(shared_key); 5202 /* sa_ignore FREED_MEMORY */ 5203 } 5204 5205 /* Insert new items here :> */ 5206 5207 /* Get rid of LOCK */ 5208 SCTP_TCB_UNLOCK(stcb); 5209 SCTP_TCB_LOCK_DESTROY(stcb); 5210 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5211 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5212 SCTP_INP_INFO_WUNLOCK(); 5213 SCTP_INP_RLOCK(inp); 5214 } 5215 #ifdef SCTP_TRACK_FREED_ASOCS 5216 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5217 /* now clean up the tasoc itself */ 5218 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5219 SCTP_DECR_ASOC_COUNT(); 5220 } else { 5221 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5222 } 5223 #else 5224 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5225 SCTP_DECR_ASOC_COUNT(); 5226 #endif 5227 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5228 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5229 /* 5230 * If its NOT the inp_free calling us AND sctp_close 5231 * as been called, we call back... 5232 */ 5233 SCTP_INP_RUNLOCK(inp); 5234 /* 5235 * This will start the kill timer (if we are the 5236 * last one) since we hold an increment yet. But 5237 * this is the only safe way to do this since 5238 * otherwise if the socket closes at the same time 5239 * we are here we might collide in the cleanup. 5240 */ 5241 sctp_inpcb_free(inp, 5242 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5243 SCTP_CALLED_DIRECTLY_NOCMPSET); 5244 SCTP_INP_DECR_REF(inp); 5245 goto out_of; 5246 } else { 5247 /* The socket is still open. */ 5248 SCTP_INP_DECR_REF(inp); 5249 } 5250 } 5251 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5252 SCTP_INP_RUNLOCK(inp); 5253 } 5254 out_of: 5255 /* destroyed the asoc */ 5256 #ifdef SCTP_LOG_CLOSING 5257 sctp_log_closing(inp, NULL, 11); 5258 #endif 5259 return (1); 5260 } 5261 5262 5263 5264 /* 5265 * determine if a destination is "reachable" based upon the addresses bound 5266 * to the current endpoint (e.g. only v4 or v6 currently bound) 5267 */ 5268 /* 5269 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5270 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5271 * types bound as its endpoint 5272 */ 5273 int 5274 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5275 { 5276 struct sctp_inpcb *inp; 5277 int answer; 5278 5279 /* 5280 * No locks here, the TCB, in all cases is already locked and an 5281 * assoc is up. There is either a INP lock by the caller applied (in 5282 * asconf case when deleting an address) or NOT in the HB case, 5283 * however if HB then the INP increment is up and the INP will not 5284 * be removed (on top of the fact that we have a TCB lock). So we 5285 * only want to read the sctp_flags, which is either bound-all or 5286 * not.. no protection needed since once an assoc is up you can't be 5287 * changing your binding. 5288 */ 5289 inp = stcb->sctp_ep; 5290 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5291 /* if bound all, destination is not restricted */ 5292 /* 5293 * RRS: Question during lock work: Is this correct? If you 5294 * are bound-all you still might need to obey the V4--V6 5295 * flags??? IMO this bound-all stuff needs to be removed! 5296 */ 5297 return (1); 5298 } 5299 /* NOTE: all "scope" checks are done when local addresses are added */ 5300 switch (destaddr->sa_family) { 5301 #ifdef INET6 5302 case AF_INET6: 5303 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5304 break; 5305 #endif 5306 #ifdef INET 5307 case AF_INET: 5308 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5309 break; 5310 #endif 5311 default: 5312 /* invalid family, so it's unreachable */ 5313 answer = 0; 5314 break; 5315 } 5316 return (answer); 5317 } 5318 5319 /* 5320 * update the inp_vflags on an endpoint 5321 */ 5322 static void 5323 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5324 { 5325 struct sctp_laddr *laddr; 5326 5327 /* first clear the flag */ 5328 inp->ip_inp.inp.inp_vflag = 0; 5329 /* set the flag based on addresses on the ep list */ 5330 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5331 if (laddr->ifa == NULL) { 5332 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5333 __func__); 5334 continue; 5335 } 5336 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5337 continue; 5338 } 5339 switch (laddr->ifa->address.sa.sa_family) { 5340 #ifdef INET6 5341 case AF_INET6: 5342 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5343 break; 5344 #endif 5345 #ifdef INET 5346 case AF_INET: 5347 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5348 break; 5349 #endif 5350 default: 5351 break; 5352 } 5353 } 5354 } 5355 5356 /* 5357 * Add the address to the endpoint local address list There is nothing to be 5358 * done if we are bound to all addresses 5359 */ 5360 void 5361 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5362 { 5363 struct sctp_laddr *laddr; 5364 int fnd, error = 0; 5365 5366 fnd = 0; 5367 5368 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5369 /* You are already bound to all. You have it already */ 5370 return; 5371 } 5372 #ifdef INET6 5373 if (ifa->address.sa.sa_family == AF_INET6) { 5374 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5375 /* Can't bind a non-useable addr. */ 5376 return; 5377 } 5378 } 5379 #endif 5380 /* first, is it already present? */ 5381 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5382 if (laddr->ifa == ifa) { 5383 fnd = 1; 5384 break; 5385 } 5386 } 5387 5388 if (fnd == 0) { 5389 /* Not in the ep list */ 5390 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5391 if (error != 0) 5392 return; 5393 inp->laddr_count++; 5394 /* update inp_vflag flags */ 5395 switch (ifa->address.sa.sa_family) { 5396 #ifdef INET6 5397 case AF_INET6: 5398 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5399 break; 5400 #endif 5401 #ifdef INET 5402 case AF_INET: 5403 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5404 break; 5405 #endif 5406 default: 5407 break; 5408 } 5409 } 5410 return; 5411 } 5412 5413 5414 /* 5415 * select a new (hopefully reachable) destination net (should only be used 5416 * when we deleted an ep addr that is the only usable source address to reach 5417 * the destination net) 5418 */ 5419 static void 5420 sctp_select_primary_destination(struct sctp_tcb *stcb) 5421 { 5422 struct sctp_nets *net; 5423 5424 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5425 /* for now, we'll just pick the first reachable one we find */ 5426 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5427 continue; 5428 if (sctp_destination_is_reachable(stcb, 5429 (struct sockaddr *)&net->ro._l_addr)) { 5430 /* found a reachable destination */ 5431 stcb->asoc.primary_destination = net; 5432 } 5433 } 5434 /* I can't there from here! ...we're gonna die shortly... */ 5435 } 5436 5437 5438 /* 5439 * Delete the address from the endpoint local address list. There is nothing 5440 * to be done if we are bound to all addresses 5441 */ 5442 void 5443 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5444 { 5445 struct sctp_laddr *laddr; 5446 int fnd; 5447 5448 fnd = 0; 5449 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5450 /* You are already bound to all. You have it already */ 5451 return; 5452 } 5453 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5454 if (laddr->ifa == ifa) { 5455 fnd = 1; 5456 break; 5457 } 5458 } 5459 if (fnd && (inp->laddr_count < 2)) { 5460 /* can't delete unless there are at LEAST 2 addresses */ 5461 return; 5462 } 5463 if (fnd) { 5464 /* 5465 * clean up any use of this address go through our 5466 * associations and clear any last_used_address that match 5467 * this one for each assoc, see if a new primary_destination 5468 * is needed 5469 */ 5470 struct sctp_tcb *stcb; 5471 5472 /* clean up "next_addr_touse" */ 5473 if (inp->next_addr_touse == laddr) 5474 /* delete this address */ 5475 inp->next_addr_touse = NULL; 5476 5477 /* clean up "last_used_address" */ 5478 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5479 struct sctp_nets *net; 5480 5481 SCTP_TCB_LOCK(stcb); 5482 if (stcb->asoc.last_used_address == laddr) 5483 /* delete this address */ 5484 stcb->asoc.last_used_address = NULL; 5485 /* 5486 * Now spin through all the nets and purge any ref 5487 * to laddr 5488 */ 5489 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5490 if (net->ro._s_addr == laddr->ifa) { 5491 /* Yep, purge src address selected */ 5492 sctp_rtentry_t *rt; 5493 5494 /* delete this address if cached */ 5495 rt = net->ro.ro_rt; 5496 if (rt != NULL) { 5497 RTFREE(rt); 5498 net->ro.ro_rt = NULL; 5499 } 5500 sctp_free_ifa(net->ro._s_addr); 5501 net->ro._s_addr = NULL; 5502 net->src_addr_selected = 0; 5503 } 5504 } 5505 SCTP_TCB_UNLOCK(stcb); 5506 } /* for each tcb */ 5507 /* remove it from the ep list */ 5508 sctp_remove_laddr(laddr); 5509 inp->laddr_count--; 5510 /* update inp_vflag flags */ 5511 sctp_update_ep_vflag(inp); 5512 } 5513 return; 5514 } 5515 5516 /* 5517 * Add the address to the TCB local address restricted list. 5518 * This is a "pending" address list (eg. addresses waiting for an 5519 * ASCONF-ACK response) and cannot be used as a valid source address. 5520 */ 5521 void 5522 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5523 { 5524 struct sctp_laddr *laddr; 5525 struct sctpladdr *list; 5526 5527 /* 5528 * Assumes TCB is locked.. and possibly the INP. May need to 5529 * confirm/fix that if we need it and is not the case. 5530 */ 5531 list = &stcb->asoc.sctp_restricted_addrs; 5532 5533 #ifdef INET6 5534 if (ifa->address.sa.sa_family == AF_INET6) { 5535 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5536 /* Can't bind a non-existent addr. */ 5537 return; 5538 } 5539 } 5540 #endif 5541 /* does the address already exist? */ 5542 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5543 if (laddr->ifa == ifa) { 5544 return; 5545 } 5546 } 5547 5548 /* add to the list */ 5549 (void)sctp_insert_laddr(list, ifa, 0); 5550 return; 5551 } 5552 5553 /* 5554 * Remove a local address from the TCB local address restricted list 5555 */ 5556 void 5557 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5558 { 5559 struct sctp_inpcb *inp; 5560 struct sctp_laddr *laddr; 5561 5562 /* 5563 * This is called by asconf work. It is assumed that a) The TCB is 5564 * locked and b) The INP is locked. This is true in as much as I can 5565 * trace through the entry asconf code where I did these locks. 5566 * Again, the ASCONF code is a bit different in that it does lock 5567 * the INP during its work often times. This must be since we don't 5568 * want other proc's looking up things while what they are looking 5569 * up is changing :-D 5570 */ 5571 5572 inp = stcb->sctp_ep; 5573 /* if subset bound and don't allow ASCONF's, can't delete last */ 5574 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5575 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5576 if (stcb->sctp_ep->laddr_count < 2) { 5577 /* can't delete last address */ 5578 return; 5579 } 5580 } 5581 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5582 /* remove the address if it exists */ 5583 if (laddr->ifa == NULL) 5584 continue; 5585 if (laddr->ifa == ifa) { 5586 sctp_remove_laddr(laddr); 5587 return; 5588 } 5589 } 5590 5591 /* address not found! */ 5592 return; 5593 } 5594 5595 /* 5596 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5597 */ 5598 /* sysctl */ 5599 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5600 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5601 5602 5603 5604 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5605 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5606 int *sctp_cpuarry = NULL; 5607 void 5608 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5609 { 5610 /* Queue a packet to a processor for the specified core */ 5611 struct sctp_mcore_queue *qent; 5612 struct sctp_mcore_ctrl *wkq; 5613 int need_wake = 0; 5614 5615 if (sctp_mcore_workers == NULL) { 5616 /* Something went way bad during setup */ 5617 sctp_input_with_port(m, off, 0); 5618 return; 5619 } 5620 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5621 (sizeof(struct sctp_mcore_queue)), 5622 SCTP_M_MCORE); 5623 if (qent == NULL) { 5624 /* This is trouble */ 5625 sctp_input_with_port(m, off, 0); 5626 return; 5627 } 5628 qent->vn = curvnet; 5629 qent->m = m; 5630 qent->off = off; 5631 qent->v6 = 0; 5632 wkq = &sctp_mcore_workers[cpu_to_use]; 5633 SCTP_MCORE_QLOCK(wkq); 5634 5635 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5636 if (wkq->running == 0) { 5637 need_wake = 1; 5638 } 5639 SCTP_MCORE_QUNLOCK(wkq); 5640 if (need_wake) { 5641 wakeup(&wkq->running); 5642 } 5643 } 5644 5645 static void 5646 sctp_mcore_thread(void *arg) 5647 { 5648 5649 struct sctp_mcore_ctrl *wkq; 5650 struct sctp_mcore_queue *qent; 5651 5652 wkq = (struct sctp_mcore_ctrl *)arg; 5653 struct mbuf *m; 5654 int off, v6; 5655 5656 /* Wait for first tickle */ 5657 SCTP_MCORE_LOCK(wkq); 5658 wkq->running = 0; 5659 msleep(&wkq->running, 5660 &wkq->core_mtx, 5661 0, "wait for pkt", 0); 5662 SCTP_MCORE_UNLOCK(wkq); 5663 5664 /* Bind to our cpu */ 5665 thread_lock(curthread); 5666 sched_bind(curthread, wkq->cpuid); 5667 thread_unlock(curthread); 5668 5669 /* Now lets start working */ 5670 SCTP_MCORE_LOCK(wkq); 5671 /* Now grab lock and go */ 5672 for (;;) { 5673 SCTP_MCORE_QLOCK(wkq); 5674 skip_sleep: 5675 wkq->running = 1; 5676 qent = TAILQ_FIRST(&wkq->que); 5677 if (qent) { 5678 TAILQ_REMOVE(&wkq->que, qent, next); 5679 SCTP_MCORE_QUNLOCK(wkq); 5680 CURVNET_SET(qent->vn); 5681 m = qent->m; 5682 off = qent->off; 5683 v6 = qent->v6; 5684 SCTP_FREE(qent, SCTP_M_MCORE); 5685 if (v6 == 0) { 5686 sctp_input_with_port(m, off, 0); 5687 } else { 5688 SCTP_PRINTF("V6 not yet supported\n"); 5689 sctp_m_freem(m); 5690 } 5691 CURVNET_RESTORE(); 5692 SCTP_MCORE_QLOCK(wkq); 5693 } 5694 wkq->running = 0; 5695 if (!TAILQ_EMPTY(&wkq->que)) { 5696 goto skip_sleep; 5697 } 5698 SCTP_MCORE_QUNLOCK(wkq); 5699 msleep(&wkq->running, 5700 &wkq->core_mtx, 5701 0, "wait for pkt", 0); 5702 } 5703 } 5704 5705 static void 5706 sctp_startup_mcore_threads(void) 5707 { 5708 int i, cpu; 5709 5710 if (mp_ncpus == 1) 5711 return; 5712 5713 if (sctp_mcore_workers != NULL) { 5714 /* 5715 * Already been here in some previous vnet? 5716 */ 5717 return; 5718 } 5719 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5720 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5721 SCTP_M_MCORE); 5722 if (sctp_mcore_workers == NULL) { 5723 /* TSNH I hope */ 5724 return; 5725 } 5726 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5727 sizeof(struct sctp_mcore_ctrl))); 5728 /* Init the structures */ 5729 for (i = 0; i <= mp_maxid; i++) { 5730 TAILQ_INIT(&sctp_mcore_workers[i].que); 5731 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5732 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5733 sctp_mcore_workers[i].cpuid = i; 5734 } 5735 if (sctp_cpuarry == NULL) { 5736 SCTP_MALLOC(sctp_cpuarry, int *, 5737 (mp_ncpus * sizeof(int)), 5738 SCTP_M_MCORE); 5739 i = 0; 5740 CPU_FOREACH(cpu) { 5741 sctp_cpuarry[i] = cpu; 5742 i++; 5743 } 5744 } 5745 /* Now start them all */ 5746 CPU_FOREACH(cpu) { 5747 (void)kproc_create(sctp_mcore_thread, 5748 (void *)&sctp_mcore_workers[cpu], 5749 &sctp_mcore_workers[cpu].thread_proc, 5750 RFPROC, 5751 SCTP_KTHREAD_PAGES, 5752 SCTP_MCORE_NAME); 5753 5754 } 5755 } 5756 5757 #endif 5758 5759 void 5760 sctp_pcb_init() 5761 { 5762 /* 5763 * SCTP initialization for the PCB structures should be called by 5764 * the sctp_init() funciton. 5765 */ 5766 int i; 5767 struct timeval tv; 5768 5769 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5770 /* error I was called twice */ 5771 return; 5772 } 5773 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5774 5775 #if defined(SCTP_LOCAL_TRACE_BUF) 5776 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5777 #endif 5778 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5779 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5780 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5781 SCTP_M_MCORE); 5782 #endif 5783 (void)SCTP_GETTIME_TIMEVAL(&tv); 5784 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5785 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5786 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5787 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5788 #else 5789 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5790 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5791 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5792 #endif 5793 /* init the empty list of (All) Endpoints */ 5794 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5795 5796 5797 /* init the hash table of endpoints */ 5798 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5799 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5800 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5801 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5802 &SCTP_BASE_INFO(hashasocmark)); 5803 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5804 &SCTP_BASE_INFO(hashmark)); 5805 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5806 &SCTP_BASE_INFO(hashtcpmark)); 5807 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5808 5809 5810 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5811 &SCTP_BASE_INFO(hashvrfmark)); 5812 5813 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5814 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5815 /* init the zones */ 5816 /* 5817 * FIX ME: Should check for NULL returns, but if it does fail we are 5818 * doomed to panic anyways... add later maybe. 5819 */ 5820 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5821 sizeof(struct sctp_inpcb), maxsockets); 5822 5823 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5824 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5825 5826 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5827 sizeof(struct sctp_laddr), 5828 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5829 5830 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5831 sizeof(struct sctp_nets), 5832 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5833 5834 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5835 sizeof(struct sctp_tmit_chunk), 5836 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5837 5838 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5839 sizeof(struct sctp_queued_to_read), 5840 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5841 5842 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5843 sizeof(struct sctp_stream_queue_pending), 5844 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5845 5846 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5847 sizeof(struct sctp_asconf), 5848 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5849 5850 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5851 sizeof(struct sctp_asconf_ack), 5852 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5853 5854 5855 /* Master Lock INIT for info structure */ 5856 SCTP_INP_INFO_LOCK_INIT(); 5857 SCTP_STATLOG_INIT_LOCK(); 5858 5859 SCTP_IPI_COUNT_INIT(); 5860 SCTP_IPI_ADDR_INIT(); 5861 #ifdef SCTP_PACKET_LOGGING 5862 SCTP_IP_PKTLOG_INIT(); 5863 #endif 5864 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5865 5866 SCTP_WQ_ADDR_INIT(); 5867 /* not sure if we need all the counts */ 5868 SCTP_BASE_INFO(ipi_count_ep) = 0; 5869 /* assoc/tcb zone info */ 5870 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5871 /* local addrlist zone info */ 5872 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5873 /* remote addrlist zone info */ 5874 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5875 /* chunk info */ 5876 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5877 5878 /* socket queue zone info */ 5879 SCTP_BASE_INFO(ipi_count_readq) = 0; 5880 5881 /* stream out queue cont */ 5882 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5883 5884 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5885 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5886 5887 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5888 5889 /* Init the TIMEWAIT list */ 5890 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5891 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5892 } 5893 sctp_startup_iterator(); 5894 5895 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5896 sctp_startup_mcore_threads(); 5897 #endif 5898 5899 /* 5900 * INIT the default VRF which for BSD is the only one, other O/S's 5901 * may have more. But initially they must start with one and then 5902 * add the VRF's as addresses are added. 5903 */ 5904 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5905 } 5906 5907 /* 5908 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5909 */ 5910 void 5911 sctp_pcb_finish(void) 5912 { 5913 struct sctp_vrflist *vrf_bucket; 5914 struct sctp_vrf *vrf, *nvrf; 5915 struct sctp_ifn *ifn, *nifn; 5916 struct sctp_ifa *ifa, *nifa; 5917 struct sctpvtaghead *chain; 5918 struct sctp_tagblock *twait_block, *prev_twait_block; 5919 struct sctp_laddr *wi, *nwi; 5920 int i; 5921 struct sctp_iterator *it, *nit; 5922 5923 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 5924 SCTP_PRINTF("%s: race condition on teardown.\n", __func__); 5925 return; 5926 } 5927 SCTP_BASE_VAR(sctp_pcb_initialized) = 0; 5928 /* 5929 * In FreeBSD the iterator thread never exits but we do clean up. 5930 * The only way FreeBSD reaches here is if we have VRF's but we 5931 * still add the ifdef to make it compile on old versions. 5932 */ 5933 retry: 5934 SCTP_IPI_ITERATOR_WQ_LOCK(); 5935 /* 5936 * sctp_iterator_worker() might be working on an it entry without 5937 * holding the lock. We won't find it on the list either and 5938 * continue and free/destroy it. While holding the lock, spin, to 5939 * avoid the race condition as sctp_iterator_worker() will have to 5940 * wait to re-aquire the lock. 5941 */ 5942 if (sctp_it_ctl.iterator_running != 0 || sctp_it_ctl.cur_it != NULL) { 5943 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5944 SCTP_PRINTF("%s: Iterator running while we held the lock. Retry. " 5945 "cur_it=%p\n", __func__, sctp_it_ctl.cur_it); 5946 DELAY(10); 5947 goto retry; 5948 } 5949 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5950 if (it->vn != curvnet) { 5951 continue; 5952 } 5953 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5954 if (it->function_atend != NULL) { 5955 (*it->function_atend) (it->pointer, it->val); 5956 } 5957 SCTP_FREE(it, SCTP_M_ITER); 5958 } 5959 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5960 SCTP_ITERATOR_LOCK(); 5961 if ((sctp_it_ctl.cur_it) && 5962 (sctp_it_ctl.cur_it->vn == curvnet)) { 5963 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5964 } 5965 SCTP_ITERATOR_UNLOCK(); 5966 SCTP_OS_TIMER_STOP_DRAIN(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5967 SCTP_WQ_ADDR_LOCK(); 5968 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5969 LIST_REMOVE(wi, sctp_nxt_addr); 5970 SCTP_DECR_LADDR_COUNT(); 5971 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5972 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5973 } 5974 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5975 } 5976 SCTP_WQ_ADDR_UNLOCK(); 5977 5978 /* 5979 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5980 * destroyed first). 5981 */ 5982 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5983 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5984 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5985 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5986 /* free the ifa */ 5987 LIST_REMOVE(ifa, next_bucket); 5988 LIST_REMOVE(ifa, next_ifa); 5989 SCTP_FREE(ifa, SCTP_M_IFA); 5990 } 5991 /* free the ifn */ 5992 LIST_REMOVE(ifn, next_bucket); 5993 LIST_REMOVE(ifn, next_ifn); 5994 SCTP_FREE(ifn, SCTP_M_IFN); 5995 } 5996 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5997 /* free the vrf */ 5998 LIST_REMOVE(vrf, next_vrf); 5999 SCTP_FREE(vrf, SCTP_M_VRF); 6000 } 6001 /* free the vrf hashes */ 6002 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6003 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6004 6005 /* 6006 * free the TIMEWAIT list elements malloc'd in the function 6007 * sctp_add_vtag_to_timewait()... 6008 */ 6009 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6010 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6011 if (!LIST_EMPTY(chain)) { 6012 prev_twait_block = NULL; 6013 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6014 if (prev_twait_block) { 6015 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6016 } 6017 prev_twait_block = twait_block; 6018 } 6019 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6020 } 6021 } 6022 6023 /* free the locks and mutexes */ 6024 #ifdef SCTP_PACKET_LOGGING 6025 SCTP_IP_PKTLOG_DESTROY(); 6026 #endif 6027 SCTP_IPI_ADDR_DESTROY(); 6028 SCTP_STATLOG_DESTROY(); 6029 SCTP_INP_INFO_LOCK_DESTROY(); 6030 6031 SCTP_WQ_ADDR_DESTROY(); 6032 6033 /* Get rid of other stuff too. */ 6034 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6035 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6036 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6037 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6038 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6039 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6040 6041 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6042 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6043 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6044 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6045 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6046 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6047 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6048 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6049 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6050 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6051 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6052 #endif 6053 } 6054 6055 6056 int 6057 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6058 int offset, int limit, 6059 struct sockaddr *src, struct sockaddr *dst, 6060 struct sockaddr *altsa) 6061 { 6062 /* 6063 * grub through the INIT pulling addresses and loading them to the 6064 * nets structure in the asoc. The from address in the mbuf should 6065 * also be loaded (if it is not already). This routine can be called 6066 * with either INIT or INIT-ACK's as long as the m points to the IP 6067 * packet and the offset points to the beginning of the parameters. 6068 */ 6069 struct sctp_inpcb *inp; 6070 struct sctp_nets *net, *nnet, *net_tmp; 6071 struct sctp_paramhdr *phdr, parm_buf; 6072 struct sctp_tcb *stcb_tmp; 6073 uint16_t ptype, plen; 6074 struct sockaddr *sa; 6075 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6076 struct sctp_auth_random *p_random = NULL; 6077 uint16_t random_len = 0; 6078 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6079 struct sctp_auth_hmac_algo *hmacs = NULL; 6080 uint16_t hmacs_len = 0; 6081 uint8_t saw_asconf = 0; 6082 uint8_t saw_asconf_ack = 0; 6083 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6084 struct sctp_auth_chunk_list *chunks = NULL; 6085 uint16_t num_chunks = 0; 6086 sctp_key_t *new_key; 6087 uint32_t keylen; 6088 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6089 uint8_t peer_supports_ecn; 6090 uint8_t peer_supports_prsctp; 6091 uint8_t peer_supports_auth; 6092 uint8_t peer_supports_asconf; 6093 uint8_t peer_supports_asconf_ack; 6094 uint8_t peer_supports_reconfig; 6095 uint8_t peer_supports_nrsack; 6096 uint8_t peer_supports_pktdrop; 6097 6098 #ifdef INET 6099 struct sockaddr_in sin; 6100 6101 #endif 6102 #ifdef INET6 6103 struct sockaddr_in6 sin6; 6104 6105 #endif 6106 6107 /* First get the destination address setup too. */ 6108 #ifdef INET 6109 memset(&sin, 0, sizeof(sin)); 6110 sin.sin_family = AF_INET; 6111 sin.sin_len = sizeof(sin); 6112 sin.sin_port = stcb->rport; 6113 #endif 6114 #ifdef INET6 6115 memset(&sin6, 0, sizeof(sin6)); 6116 sin6.sin6_family = AF_INET6; 6117 sin6.sin6_len = sizeof(struct sockaddr_in6); 6118 sin6.sin6_port = stcb->rport; 6119 #endif 6120 if (altsa) { 6121 sa = altsa; 6122 } else { 6123 sa = src; 6124 } 6125 peer_supports_ecn = 0; 6126 peer_supports_prsctp = 0; 6127 peer_supports_auth = 0; 6128 peer_supports_asconf = 0; 6129 peer_supports_reconfig = 0; 6130 peer_supports_nrsack = 0; 6131 peer_supports_pktdrop = 0; 6132 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6133 /* mark all addresses that we have currently on the list */ 6134 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6135 } 6136 /* does the source address already exist? if so skip it */ 6137 inp = stcb->sctp_ep; 6138 atomic_add_int(&stcb->asoc.refcnt, 1); 6139 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6140 atomic_add_int(&stcb->asoc.refcnt, -1); 6141 6142 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6143 /* we must add the source address */ 6144 /* no scope set here since we have a tcb already. */ 6145 switch (sa->sa_family) { 6146 #ifdef INET 6147 case AF_INET: 6148 if (stcb->asoc.scope.ipv4_addr_legal) { 6149 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6150 return (-1); 6151 } 6152 } 6153 break; 6154 #endif 6155 #ifdef INET6 6156 case AF_INET6: 6157 if (stcb->asoc.scope.ipv6_addr_legal) { 6158 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6159 return (-2); 6160 } 6161 } 6162 break; 6163 #endif 6164 default: 6165 break; 6166 } 6167 } else { 6168 if (net_tmp != NULL && stcb_tmp == stcb) { 6169 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6170 } else if (stcb_tmp != stcb) { 6171 /* It belongs to another association? */ 6172 if (stcb_tmp) 6173 SCTP_TCB_UNLOCK(stcb_tmp); 6174 return (-3); 6175 } 6176 } 6177 if (stcb->asoc.state == 0) { 6178 /* the assoc was freed? */ 6179 return (-4); 6180 } 6181 /* now we must go through each of the params. */ 6182 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6183 while (phdr) { 6184 ptype = ntohs(phdr->param_type); 6185 plen = ntohs(phdr->param_length); 6186 /* 6187 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6188 * (uint32_t)ptype, (int)plen); 6189 */ 6190 if (offset + plen > limit) { 6191 break; 6192 } 6193 if (plen == 0) { 6194 break; 6195 } 6196 #ifdef INET 6197 if (ptype == SCTP_IPV4_ADDRESS) { 6198 if (stcb->asoc.scope.ipv4_addr_legal) { 6199 struct sctp_ipv4addr_param *p4, p4_buf; 6200 6201 /* ok get the v4 address and check/add */ 6202 phdr = sctp_get_next_param(m, offset, 6203 (struct sctp_paramhdr *)&p4_buf, 6204 sizeof(p4_buf)); 6205 if (plen != sizeof(struct sctp_ipv4addr_param) || 6206 phdr == NULL) { 6207 return (-5); 6208 } 6209 p4 = (struct sctp_ipv4addr_param *)phdr; 6210 sin.sin_addr.s_addr = p4->addr; 6211 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6212 /* Skip multi-cast addresses */ 6213 goto next_param; 6214 } 6215 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6216 (sin.sin_addr.s_addr == INADDR_ANY)) { 6217 goto next_param; 6218 } 6219 sa = (struct sockaddr *)&sin; 6220 inp = stcb->sctp_ep; 6221 atomic_add_int(&stcb->asoc.refcnt, 1); 6222 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6223 dst, stcb); 6224 atomic_add_int(&stcb->asoc.refcnt, -1); 6225 6226 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6227 inp == NULL) { 6228 /* we must add the source address */ 6229 /* 6230 * no scope set since we have a tcb 6231 * already 6232 */ 6233 6234 /* 6235 * we must validate the state again 6236 * here 6237 */ 6238 add_it_now: 6239 if (stcb->asoc.state == 0) { 6240 /* the assoc was freed? */ 6241 return (-7); 6242 } 6243 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6244 return (-8); 6245 } 6246 } else if (stcb_tmp == stcb) { 6247 if (stcb->asoc.state == 0) { 6248 /* the assoc was freed? */ 6249 return (-10); 6250 } 6251 if (net != NULL) { 6252 /* clear flag */ 6253 net->dest_state &= 6254 ~SCTP_ADDR_NOT_IN_ASSOC; 6255 } 6256 } else { 6257 /* 6258 * strange, address is in another 6259 * assoc? straighten out locks. 6260 */ 6261 if (stcb_tmp) { 6262 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6263 struct mbuf *op_err; 6264 char msg[SCTP_DIAG_INFO_LEN]; 6265 6266 /* 6267 * in setup state we 6268 * abort this guy 6269 */ 6270 snprintf(msg, sizeof(msg), 6271 "%s:%d at %s", __FILE__, __LINE__, __func__); 6272 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6273 msg); 6274 sctp_abort_an_association(stcb_tmp->sctp_ep, 6275 stcb_tmp, op_err, 6276 SCTP_SO_NOT_LOCKED); 6277 goto add_it_now; 6278 } 6279 SCTP_TCB_UNLOCK(stcb_tmp); 6280 } 6281 if (stcb->asoc.state == 0) { 6282 /* the assoc was freed? */ 6283 return (-12); 6284 } 6285 return (-13); 6286 } 6287 } 6288 } else 6289 #endif 6290 #ifdef INET6 6291 if (ptype == SCTP_IPV6_ADDRESS) { 6292 if (stcb->asoc.scope.ipv6_addr_legal) { 6293 /* ok get the v6 address and check/add */ 6294 struct sctp_ipv6addr_param *p6, p6_buf; 6295 6296 phdr = sctp_get_next_param(m, offset, 6297 (struct sctp_paramhdr *)&p6_buf, 6298 sizeof(p6_buf)); 6299 if (plen != sizeof(struct sctp_ipv6addr_param) || 6300 phdr == NULL) { 6301 return (-14); 6302 } 6303 p6 = (struct sctp_ipv6addr_param *)phdr; 6304 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6305 sizeof(p6->addr)); 6306 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6307 /* Skip multi-cast addresses */ 6308 goto next_param; 6309 } 6310 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6311 /* 6312 * Link local make no sense without 6313 * scope 6314 */ 6315 goto next_param; 6316 } 6317 sa = (struct sockaddr *)&sin6; 6318 inp = stcb->sctp_ep; 6319 atomic_add_int(&stcb->asoc.refcnt, 1); 6320 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6321 dst, stcb); 6322 atomic_add_int(&stcb->asoc.refcnt, -1); 6323 if (stcb_tmp == NULL && 6324 (inp == stcb->sctp_ep || inp == NULL)) { 6325 /* 6326 * we must validate the state again 6327 * here 6328 */ 6329 add_it_now6: 6330 if (stcb->asoc.state == 0) { 6331 /* the assoc was freed? */ 6332 return (-16); 6333 } 6334 /* 6335 * we must add the address, no scope 6336 * set 6337 */ 6338 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6339 return (-17); 6340 } 6341 } else if (stcb_tmp == stcb) { 6342 /* 6343 * we must validate the state again 6344 * here 6345 */ 6346 if (stcb->asoc.state == 0) { 6347 /* the assoc was freed? */ 6348 return (-19); 6349 } 6350 if (net != NULL) { 6351 /* clear flag */ 6352 net->dest_state &= 6353 ~SCTP_ADDR_NOT_IN_ASSOC; 6354 } 6355 } else { 6356 /* 6357 * strange, address is in another 6358 * assoc? straighten out locks. 6359 */ 6360 if (stcb_tmp) { 6361 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6362 struct mbuf *op_err; 6363 char msg[SCTP_DIAG_INFO_LEN]; 6364 6365 /* 6366 * in setup state we 6367 * abort this guy 6368 */ 6369 snprintf(msg, sizeof(msg), 6370 "%s:%d at %s", __FILE__, __LINE__, __func__); 6371 op_err = sctp_generate_cause(SCTP_BASE_SYSCTL(sctp_diag_info_code), 6372 msg); 6373 sctp_abort_an_association(stcb_tmp->sctp_ep, 6374 stcb_tmp, op_err, 6375 SCTP_SO_NOT_LOCKED); 6376 goto add_it_now6; 6377 } 6378 SCTP_TCB_UNLOCK(stcb_tmp); 6379 } 6380 if (stcb->asoc.state == 0) { 6381 /* the assoc was freed? */ 6382 return (-21); 6383 } 6384 return (-22); 6385 } 6386 } 6387 } else 6388 #endif 6389 if (ptype == SCTP_ECN_CAPABLE) { 6390 peer_supports_ecn = 1; 6391 } else if (ptype == SCTP_ULP_ADAPTATION) { 6392 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6393 struct sctp_adaptation_layer_indication ai, 6394 *aip; 6395 6396 phdr = sctp_get_next_param(m, offset, 6397 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6398 aip = (struct sctp_adaptation_layer_indication *)phdr; 6399 if (aip) { 6400 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6401 stcb->asoc.adaptation_needed = 1; 6402 } 6403 } 6404 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6405 struct sctp_asconf_addr_param lstore, *fee; 6406 int lptype; 6407 struct sockaddr *lsa = NULL; 6408 6409 #ifdef INET 6410 struct sctp_asconf_addrv4_param *fii; 6411 6412 #endif 6413 6414 if (stcb->asoc.asconf_supported == 0) { 6415 return (-100); 6416 } 6417 if (plen > sizeof(lstore)) { 6418 return (-23); 6419 } 6420 phdr = sctp_get_next_param(m, offset, 6421 (struct sctp_paramhdr *)&lstore, 6422 min(plen, sizeof(lstore))); 6423 if (phdr == NULL) { 6424 return (-24); 6425 } 6426 fee = (struct sctp_asconf_addr_param *)phdr; 6427 lptype = ntohs(fee->addrp.ph.param_type); 6428 switch (lptype) { 6429 #ifdef INET 6430 case SCTP_IPV4_ADDRESS: 6431 if (plen != 6432 sizeof(struct sctp_asconf_addrv4_param)) { 6433 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6434 (int)sizeof(struct sctp_asconf_addrv4_param), 6435 plen); 6436 } else { 6437 fii = (struct sctp_asconf_addrv4_param *)fee; 6438 sin.sin_addr.s_addr = fii->addrp.addr; 6439 lsa = (struct sockaddr *)&sin; 6440 } 6441 break; 6442 #endif 6443 #ifdef INET6 6444 case SCTP_IPV6_ADDRESS: 6445 if (plen != 6446 sizeof(struct sctp_asconf_addr_param)) { 6447 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6448 (int)sizeof(struct sctp_asconf_addr_param), 6449 plen); 6450 } else { 6451 memcpy(sin6.sin6_addr.s6_addr, 6452 fee->addrp.addr, 6453 sizeof(fee->addrp.addr)); 6454 lsa = (struct sockaddr *)&sin6; 6455 } 6456 break; 6457 #endif 6458 default: 6459 break; 6460 } 6461 if (lsa) { 6462 (void)sctp_set_primary_addr(stcb, sa, NULL); 6463 } 6464 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6465 stcb->asoc.peer_supports_nat = 1; 6466 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6467 /* Peer supports pr-sctp */ 6468 peer_supports_prsctp = 1; 6469 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6470 /* A supported extension chunk */ 6471 struct sctp_supported_chunk_types_param *pr_supported; 6472 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6473 int num_ent, i; 6474 6475 phdr = sctp_get_next_param(m, offset, 6476 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6477 if (phdr == NULL) { 6478 return (-25); 6479 } 6480 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6481 num_ent = plen - sizeof(struct sctp_paramhdr); 6482 for (i = 0; i < num_ent; i++) { 6483 switch (pr_supported->chunk_types[i]) { 6484 case SCTP_ASCONF: 6485 peer_supports_asconf = 1; 6486 break; 6487 case SCTP_ASCONF_ACK: 6488 peer_supports_asconf_ack = 1; 6489 break; 6490 case SCTP_FORWARD_CUM_TSN: 6491 peer_supports_prsctp = 1; 6492 break; 6493 case SCTP_PACKET_DROPPED: 6494 peer_supports_pktdrop = 1; 6495 break; 6496 case SCTP_NR_SELECTIVE_ACK: 6497 peer_supports_nrsack = 1; 6498 break; 6499 case SCTP_STREAM_RESET: 6500 peer_supports_reconfig = 1; 6501 break; 6502 case SCTP_AUTHENTICATION: 6503 peer_supports_auth = 1; 6504 break; 6505 default: 6506 /* one I have not learned yet */ 6507 break; 6508 6509 } 6510 } 6511 } else if (ptype == SCTP_RANDOM) { 6512 if (plen > sizeof(random_store)) 6513 break; 6514 if (got_random) { 6515 /* already processed a RANDOM */ 6516 goto next_param; 6517 } 6518 phdr = sctp_get_next_param(m, offset, 6519 (struct sctp_paramhdr *)random_store, 6520 min(sizeof(random_store), plen)); 6521 if (phdr == NULL) 6522 return (-26); 6523 p_random = (struct sctp_auth_random *)phdr; 6524 random_len = plen - sizeof(*p_random); 6525 /* enforce the random length */ 6526 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6527 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6528 return (-27); 6529 } 6530 got_random = 1; 6531 } else if (ptype == SCTP_HMAC_LIST) { 6532 uint16_t num_hmacs; 6533 uint16_t i; 6534 6535 if (plen > sizeof(hmacs_store)) 6536 break; 6537 if (got_hmacs) { 6538 /* already processed a HMAC list */ 6539 goto next_param; 6540 } 6541 phdr = sctp_get_next_param(m, offset, 6542 (struct sctp_paramhdr *)hmacs_store, 6543 min(plen, sizeof(hmacs_store))); 6544 if (phdr == NULL) 6545 return (-28); 6546 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6547 hmacs_len = plen - sizeof(*hmacs); 6548 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6549 /* validate the hmac list */ 6550 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6551 return (-29); 6552 } 6553 if (stcb->asoc.peer_hmacs != NULL) 6554 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6555 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6556 if (stcb->asoc.peer_hmacs != NULL) { 6557 for (i = 0; i < num_hmacs; i++) { 6558 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6559 ntohs(hmacs->hmac_ids[i])); 6560 } 6561 } 6562 got_hmacs = 1; 6563 } else if (ptype == SCTP_CHUNK_LIST) { 6564 int i; 6565 6566 if (plen > sizeof(chunks_store)) 6567 break; 6568 if (got_chklist) { 6569 /* already processed a Chunks list */ 6570 goto next_param; 6571 } 6572 phdr = sctp_get_next_param(m, offset, 6573 (struct sctp_paramhdr *)chunks_store, 6574 min(plen, sizeof(chunks_store))); 6575 if (phdr == NULL) 6576 return (-30); 6577 chunks = (struct sctp_auth_chunk_list *)phdr; 6578 num_chunks = plen - sizeof(*chunks); 6579 if (stcb->asoc.peer_auth_chunks != NULL) 6580 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6581 else 6582 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6583 for (i = 0; i < num_chunks; i++) { 6584 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6585 stcb->asoc.peer_auth_chunks); 6586 /* record asconf/asconf-ack if listed */ 6587 if (chunks->chunk_types[i] == SCTP_ASCONF) 6588 saw_asconf = 1; 6589 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6590 saw_asconf_ack = 1; 6591 6592 } 6593 got_chklist = 1; 6594 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6595 (ptype == SCTP_STATE_COOKIE) || 6596 (ptype == SCTP_UNRECOG_PARAM) || 6597 (ptype == SCTP_COOKIE_PRESERVE) || 6598 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6599 (ptype == SCTP_ADD_IP_ADDRESS) || 6600 (ptype == SCTP_DEL_IP_ADDRESS) || 6601 (ptype == SCTP_ERROR_CAUSE_IND) || 6602 (ptype == SCTP_SUCCESS_REPORT)) { 6603 /* don't care */ ; 6604 } else { 6605 if ((ptype & 0x8000) == 0x0000) { 6606 /* 6607 * must stop processing the rest of the 6608 * param's. Any report bits were handled 6609 * with the call to 6610 * sctp_arethere_unrecognized_parameters() 6611 * when the INIT or INIT-ACK was first seen. 6612 */ 6613 break; 6614 } 6615 } 6616 6617 next_param: 6618 offset += SCTP_SIZE32(plen); 6619 if (offset >= limit) { 6620 break; 6621 } 6622 phdr = sctp_get_next_param(m, offset, &parm_buf, 6623 sizeof(parm_buf)); 6624 } 6625 /* Now check to see if we need to purge any addresses */ 6626 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6627 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6628 SCTP_ADDR_NOT_IN_ASSOC) { 6629 /* This address has been removed from the asoc */ 6630 /* remove and free it */ 6631 stcb->asoc.numnets--; 6632 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6633 sctp_free_remote_addr(net); 6634 if (net == stcb->asoc.primary_destination) { 6635 stcb->asoc.primary_destination = NULL; 6636 sctp_select_primary_destination(stcb); 6637 } 6638 } 6639 } 6640 if ((stcb->asoc.ecn_supported == 1) && 6641 (peer_supports_ecn == 0)) { 6642 stcb->asoc.ecn_supported = 0; 6643 } 6644 if ((stcb->asoc.prsctp_supported == 1) && 6645 (peer_supports_prsctp == 0)) { 6646 stcb->asoc.prsctp_supported = 0; 6647 } 6648 if ((stcb->asoc.auth_supported == 1) && 6649 ((peer_supports_auth == 0) || 6650 (got_random == 0) || (got_hmacs == 0))) { 6651 stcb->asoc.auth_supported = 0; 6652 } 6653 if ((stcb->asoc.asconf_supported == 1) && 6654 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6655 (stcb->asoc.auth_supported == 0) || 6656 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6657 stcb->asoc.asconf_supported = 0; 6658 } 6659 if ((stcb->asoc.reconfig_supported == 1) && 6660 (peer_supports_reconfig == 0)) { 6661 stcb->asoc.reconfig_supported = 0; 6662 } 6663 if ((stcb->asoc.nrsack_supported == 1) && 6664 (peer_supports_nrsack == 0)) { 6665 stcb->asoc.nrsack_supported = 0; 6666 } 6667 if ((stcb->asoc.pktdrop_supported == 1) && 6668 (peer_supports_pktdrop == 0)) { 6669 stcb->asoc.pktdrop_supported = 0; 6670 } 6671 /* validate authentication required parameters */ 6672 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6673 /* peer does not support auth but sent a chunks list? */ 6674 return (-31); 6675 } 6676 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6677 /* peer supports asconf but not auth? */ 6678 return (-32); 6679 } else if ((peer_supports_asconf == 1) && 6680 (peer_supports_auth == 1) && 6681 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6682 return (-33); 6683 } 6684 /* concatenate the full random key */ 6685 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6686 if (chunks != NULL) { 6687 keylen += sizeof(*chunks) + num_chunks; 6688 } 6689 new_key = sctp_alloc_key(keylen); 6690 if (new_key != NULL) { 6691 /* copy in the RANDOM */ 6692 if (p_random != NULL) { 6693 keylen = sizeof(*p_random) + random_len; 6694 bcopy(p_random, new_key->key, keylen); 6695 } 6696 /* append in the AUTH chunks */ 6697 if (chunks != NULL) { 6698 bcopy(chunks, new_key->key + keylen, 6699 sizeof(*chunks) + num_chunks); 6700 keylen += sizeof(*chunks) + num_chunks; 6701 } 6702 /* append in the HMACs */ 6703 if (hmacs != NULL) { 6704 bcopy(hmacs, new_key->key + keylen, 6705 sizeof(*hmacs) + hmacs_len); 6706 } 6707 } else { 6708 /* failed to get memory for the key */ 6709 return (-34); 6710 } 6711 if (stcb->asoc.authinfo.peer_random != NULL) 6712 sctp_free_key(stcb->asoc.authinfo.peer_random); 6713 stcb->asoc.authinfo.peer_random = new_key; 6714 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6715 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6716 6717 return (0); 6718 } 6719 6720 int 6721 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6722 struct sctp_nets *net) 6723 { 6724 /* make sure the requested primary address exists in the assoc */ 6725 if (net == NULL && sa) 6726 net = sctp_findnet(stcb, sa); 6727 6728 if (net == NULL) { 6729 /* didn't find the requested primary address! */ 6730 return (-1); 6731 } else { 6732 /* set the primary address */ 6733 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6734 /* Must be confirmed, so queue to set */ 6735 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6736 return (0); 6737 } 6738 stcb->asoc.primary_destination = net; 6739 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6740 sctp_free_remote_addr(stcb->asoc.alternate); 6741 stcb->asoc.alternate = NULL; 6742 } 6743 net = TAILQ_FIRST(&stcb->asoc.nets); 6744 if (net != stcb->asoc.primary_destination) { 6745 /* 6746 * first one on the list is NOT the primary 6747 * sctp_cmpaddr() is much more efficient if the 6748 * primary is the first on the list, make it so. 6749 */ 6750 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6751 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6752 } 6753 return (0); 6754 } 6755 } 6756 6757 int 6758 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6759 { 6760 /* 6761 * This function serves two purposes. It will see if a TAG can be 6762 * re-used and return 1 for yes it is ok and 0 for don't use that 6763 * tag. A secondary function it will do is purge out old tags that 6764 * can be removed. 6765 */ 6766 struct sctpvtaghead *chain; 6767 struct sctp_tagblock *twait_block; 6768 struct sctpasochead *head; 6769 struct sctp_tcb *stcb; 6770 int i; 6771 6772 SCTP_INP_INFO_RLOCK(); 6773 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6774 SCTP_BASE_INFO(hashasocmark))]; 6775 LIST_FOREACH(stcb, head, sctp_asocs) { 6776 /* 6777 * We choose not to lock anything here. TCB's can't be 6778 * removed since we have the read lock, so they can't be 6779 * freed on us, same thing for the INP. I may be wrong with 6780 * this assumption, but we will go with it for now :-) 6781 */ 6782 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6783 continue; 6784 } 6785 if (stcb->asoc.my_vtag == tag) { 6786 /* candidate */ 6787 if (stcb->rport != rport) { 6788 continue; 6789 } 6790 if (stcb->sctp_ep->sctp_lport != lport) { 6791 continue; 6792 } 6793 /* Its a used tag set */ 6794 SCTP_INP_INFO_RUNLOCK(); 6795 return (0); 6796 } 6797 } 6798 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6799 /* Now what about timed wait ? */ 6800 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6801 /* 6802 * Block(s) are present, lets see if we have this tag in the 6803 * list 6804 */ 6805 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6806 if (twait_block->vtag_block[i].v_tag == 0) { 6807 /* not used */ 6808 continue; 6809 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6810 now->tv_sec) { 6811 /* Audit expires this guy */ 6812 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6813 twait_block->vtag_block[i].v_tag = 0; 6814 twait_block->vtag_block[i].lport = 0; 6815 twait_block->vtag_block[i].rport = 0; 6816 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6817 (twait_block->vtag_block[i].lport == lport) && 6818 (twait_block->vtag_block[i].rport == rport)) { 6819 /* Bad tag, sorry :< */ 6820 SCTP_INP_INFO_RUNLOCK(); 6821 return (0); 6822 } 6823 } 6824 } 6825 SCTP_INP_INFO_RUNLOCK(); 6826 return (1); 6827 } 6828 6829 static void 6830 sctp_drain_mbufs(struct sctp_tcb *stcb) 6831 { 6832 /* 6833 * We must hunt this association for MBUF's past the cumack (i.e. 6834 * out of order data that we can renege on). 6835 */ 6836 struct sctp_association *asoc; 6837 struct sctp_tmit_chunk *chk, *nchk; 6838 uint32_t cumulative_tsn_p1; 6839 struct sctp_queued_to_read *ctl, *nctl; 6840 int cnt, strmat; 6841 uint32_t gap, i; 6842 int fnd = 0; 6843 6844 /* We look for anything larger than the cum-ack + 1 */ 6845 6846 asoc = &stcb->asoc; 6847 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6848 /* none we can reneg on. */ 6849 return; 6850 } 6851 SCTP_STAT_INCR(sctps_protocol_drains_done); 6852 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6853 cnt = 0; 6854 /* First look in the re-assembly queue */ 6855 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6856 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6857 /* Yep it is above cum-ack */ 6858 cnt++; 6859 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6860 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6861 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6862 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6863 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6864 if (chk->data) { 6865 sctp_m_freem(chk->data); 6866 chk->data = NULL; 6867 } 6868 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6869 } 6870 } 6871 /* Ok that was fun, now we will drain all the inbound streams? */ 6872 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6873 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6874 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6875 /* Yep it is above cum-ack */ 6876 cnt++; 6877 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6878 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6879 sctp_ucount_decr(asoc->cnt_on_all_streams); 6880 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6881 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6882 if (ctl->data) { 6883 sctp_m_freem(ctl->data); 6884 ctl->data = NULL; 6885 } 6886 sctp_free_remote_addr(ctl->whoFrom); 6887 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6888 SCTP_DECR_READQ_COUNT(); 6889 } 6890 } 6891 } 6892 if (cnt) { 6893 /* We must back down to see what the new highest is */ 6894 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6895 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6896 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6897 asoc->highest_tsn_inside_map = i; 6898 fnd = 1; 6899 break; 6900 } 6901 } 6902 if (!fnd) { 6903 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6904 } 6905 /* 6906 * Question, should we go through the delivery queue? The 6907 * only reason things are on here is the app not reading OR 6908 * a p-d-api up. An attacker COULD send enough in to 6909 * initiate the PD-API and then send a bunch of stuff to 6910 * other streams... these would wind up on the delivery 6911 * queue.. and then we would not get to them. But in order 6912 * to do this I then have to back-track and un-deliver 6913 * sequence numbers in streams.. el-yucko. I think for now 6914 * we will NOT look at the delivery queue and leave it to be 6915 * something to consider later. An alternative would be to 6916 * abort the P-D-API with a notification and then deliver 6917 * the data.... Or another method might be to keep track of 6918 * how many times the situation occurs and if we see a 6919 * possible attack underway just abort the association. 6920 */ 6921 #ifdef SCTP_DEBUG 6922 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6923 #endif 6924 /* 6925 * Now do we need to find a new 6926 * asoc->highest_tsn_inside_map? 6927 */ 6928 asoc->last_revoke_count = cnt; 6929 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6930 /* sa_ignore NO_NULL_CHK */ 6931 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6932 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6933 } 6934 /* 6935 * Another issue, in un-setting the TSN's in the mapping array we 6936 * DID NOT adjust the highest_tsn marker. This will cause one of 6937 * two things to occur. It may cause us to do extra work in checking 6938 * for our mapping array movement. More importantly it may cause us 6939 * to SACK every datagram. This may not be a bad thing though since 6940 * we will recover once we get our cum-ack above and all this stuff 6941 * we dumped recovered. 6942 */ 6943 } 6944 6945 void 6946 sctp_drain() 6947 { 6948 /* 6949 * We must walk the PCB lists for ALL associations here. The system 6950 * is LOW on MBUF's and needs help. This is where reneging will 6951 * occur. We really hope this does NOT happen! 6952 */ 6953 VNET_ITERATOR_DECL(vnet_iter); 6954 VNET_LIST_RLOCK_NOSLEEP(); 6955 VNET_FOREACH(vnet_iter) { 6956 CURVNET_SET(vnet_iter); 6957 struct sctp_inpcb *inp; 6958 struct sctp_tcb *stcb; 6959 6960 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6961 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6962 #ifdef VIMAGE 6963 continue; 6964 #else 6965 return; 6966 #endif 6967 } 6968 SCTP_INP_INFO_RLOCK(); 6969 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6970 /* For each endpoint */ 6971 SCTP_INP_RLOCK(inp); 6972 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6973 /* For each association */ 6974 SCTP_TCB_LOCK(stcb); 6975 sctp_drain_mbufs(stcb); 6976 SCTP_TCB_UNLOCK(stcb); 6977 } 6978 SCTP_INP_RUNLOCK(inp); 6979 } 6980 SCTP_INP_INFO_RUNLOCK(); 6981 CURVNET_RESTORE(); 6982 } 6983 VNET_LIST_RUNLOCK_NOSLEEP(); 6984 } 6985 6986 /* 6987 * start a new iterator 6988 * iterates through all endpoints and associations based on the pcb_state 6989 * flags and asoc_state. "af" (mandatory) is executed for all matching 6990 * assocs and "ef" (optional) is executed when the iterator completes. 6991 * "inpf" (optional) is executed for each new endpoint as it is being 6992 * iterated through. inpe (optional) is called when the inp completes 6993 * its way through all the stcbs. 6994 */ 6995 int 6996 sctp_initiate_iterator(inp_func inpf, 6997 asoc_func af, 6998 inp_func inpe, 6999 uint32_t pcb_state, 7000 uint32_t pcb_features, 7001 uint32_t asoc_state, 7002 void *argp, 7003 uint32_t argi, 7004 end_func ef, 7005 struct sctp_inpcb *s_inp, 7006 uint8_t chunk_output_off) 7007 { 7008 struct sctp_iterator *it = NULL; 7009 7010 if (af == NULL) { 7011 return (-1); 7012 } 7013 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7014 SCTP_PRINTF("%s: abort on initialize being %d\n", __func__, 7015 SCTP_BASE_VAR(sctp_pcb_initialized)); 7016 return (-1); 7017 } 7018 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7019 SCTP_M_ITER); 7020 if (it == NULL) { 7021 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7022 return (ENOMEM); 7023 } 7024 memset(it, 0, sizeof(*it)); 7025 it->function_assoc = af; 7026 it->function_inp = inpf; 7027 if (inpf) 7028 it->done_current_ep = 0; 7029 else 7030 it->done_current_ep = 1; 7031 it->function_atend = ef; 7032 it->pointer = argp; 7033 it->val = argi; 7034 it->pcb_flags = pcb_state; 7035 it->pcb_features = pcb_features; 7036 it->asoc_state = asoc_state; 7037 it->function_inp_end = inpe; 7038 it->no_chunk_output = chunk_output_off; 7039 it->vn = curvnet; 7040 if (s_inp) { 7041 /* Assume lock is held here */ 7042 it->inp = s_inp; 7043 SCTP_INP_INCR_REF(it->inp); 7044 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7045 } else { 7046 SCTP_INP_INFO_RLOCK(); 7047 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7048 if (it->inp) { 7049 SCTP_INP_INCR_REF(it->inp); 7050 } 7051 SCTP_INP_INFO_RUNLOCK(); 7052 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7053 7054 } 7055 SCTP_IPI_ITERATOR_WQ_LOCK(); 7056 if (SCTP_BASE_VAR(sctp_pcb_initialized) == 0) { 7057 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7058 SCTP_PRINTF("%s: rollback on initialize being %d it=%p\n", __func__, 7059 SCTP_BASE_VAR(sctp_pcb_initialized), it); 7060 SCTP_FREE(it, SCTP_M_ITER); 7061 return (-1); 7062 } 7063 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7064 if (sctp_it_ctl.iterator_running == 0) { 7065 sctp_wakeup_iterator(); 7066 } 7067 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7068 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7069 return (0); 7070 }
Cache object: 809d48e18e97e0d55be3dbdbd692bfe7
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