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: releng/10.1/sys/netinet/sctp_pcb.c 271750 2014-09-18 09:49:49Z tuexen $"); 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", __FUNCTION__); 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 if (head == NULL) { 1445 goto null_return; 1446 } 1447 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1448 if (stcb->rport != rport) { 1449 /* remote port does not match */ 1450 continue; 1451 } 1452 SCTP_TCB_LOCK(stcb); 1453 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1454 SCTP_TCB_UNLOCK(stcb); 1455 continue; 1456 } 1457 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1458 SCTP_TCB_UNLOCK(stcb); 1459 continue; 1460 } 1461 /* now look at the list of remote addresses */ 1462 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1463 #ifdef INVARIANTS 1464 if (net == (TAILQ_NEXT(net, sctp_next))) { 1465 panic("Corrupt net list"); 1466 } 1467 #endif 1468 if (net->ro._l_addr.sa.sa_family != 1469 remote->sa_family) { 1470 /* not the same family */ 1471 continue; 1472 } 1473 switch (remote->sa_family) { 1474 #ifdef INET 1475 case AF_INET: 1476 { 1477 struct sockaddr_in *sin, 1478 *rsin; 1479 1480 sin = (struct sockaddr_in *) 1481 &net->ro._l_addr; 1482 rsin = (struct sockaddr_in *)remote; 1483 if (sin->sin_addr.s_addr == 1484 rsin->sin_addr.s_addr) { 1485 /* found it */ 1486 if (netp != NULL) { 1487 *netp = net; 1488 } 1489 if (locked_tcb == NULL) { 1490 SCTP_INP_DECR_REF(inp); 1491 } else if (locked_tcb != stcb) { 1492 SCTP_TCB_LOCK(locked_tcb); 1493 } 1494 if (locked_tcb) { 1495 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1496 } 1497 SCTP_INP_WUNLOCK(inp); 1498 SCTP_INP_INFO_RUNLOCK(); 1499 return (stcb); 1500 } 1501 break; 1502 } 1503 #endif 1504 #ifdef INET6 1505 case AF_INET6: 1506 { 1507 struct sockaddr_in6 *sin6, 1508 *rsin6; 1509 1510 sin6 = (struct sockaddr_in6 *) 1511 &net->ro._l_addr; 1512 rsin6 = (struct sockaddr_in6 *)remote; 1513 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1514 rsin6)) { 1515 /* found it */ 1516 if (netp != NULL) { 1517 *netp = net; 1518 } 1519 if (locked_tcb == NULL) { 1520 SCTP_INP_DECR_REF(inp); 1521 } else if (locked_tcb != stcb) { 1522 SCTP_TCB_LOCK(locked_tcb); 1523 } 1524 if (locked_tcb) { 1525 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1526 } 1527 SCTP_INP_WUNLOCK(inp); 1528 SCTP_INP_INFO_RUNLOCK(); 1529 return (stcb); 1530 } 1531 break; 1532 } 1533 #endif 1534 default: 1535 /* TSNH */ 1536 break; 1537 } 1538 } 1539 SCTP_TCB_UNLOCK(stcb); 1540 } 1541 } 1542 null_return: 1543 /* clean up for returning null */ 1544 if (locked_tcb) { 1545 SCTP_TCB_LOCK(locked_tcb); 1546 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1547 } 1548 SCTP_INP_WUNLOCK(inp); 1549 SCTP_INP_INFO_RUNLOCK(); 1550 /* not found */ 1551 return (NULL); 1552 } 1553 1554 1555 /* 1556 * Find an association for a specific endpoint using the association id given 1557 * out in the COMM_UP notification 1558 */ 1559 struct sctp_tcb * 1560 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1561 { 1562 /* 1563 * Use my the assoc_id to find a endpoint 1564 */ 1565 struct sctpasochead *head; 1566 struct sctp_tcb *stcb; 1567 uint32_t id; 1568 1569 if (inp == NULL) { 1570 SCTP_PRINTF("TSNH ep_associd\n"); 1571 return (NULL); 1572 } 1573 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1574 SCTP_PRINTF("TSNH ep_associd0\n"); 1575 return (NULL); 1576 } 1577 id = (uint32_t) asoc_id; 1578 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1579 if (head == NULL) { 1580 /* invalid id TSNH */ 1581 SCTP_PRINTF("TSNH ep_associd1\n"); 1582 return (NULL); 1583 } 1584 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1585 if (stcb->asoc.assoc_id == id) { 1586 if (inp != stcb->sctp_ep) { 1587 /* 1588 * some other guy has the same id active (id 1589 * collision ??). 1590 */ 1591 SCTP_PRINTF("TSNH ep_associd2\n"); 1592 continue; 1593 } 1594 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1595 continue; 1596 } 1597 if (want_lock) { 1598 SCTP_TCB_LOCK(stcb); 1599 } 1600 return (stcb); 1601 } 1602 } 1603 return (NULL); 1604 } 1605 1606 1607 struct sctp_tcb * 1608 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1609 { 1610 struct sctp_tcb *stcb; 1611 1612 SCTP_INP_RLOCK(inp); 1613 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1614 SCTP_INP_RUNLOCK(inp); 1615 return (stcb); 1616 } 1617 1618 1619 /* 1620 * Endpoint probe expects that the INP_INFO is locked. 1621 */ 1622 static struct sctp_inpcb * 1623 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1624 uint16_t lport, uint32_t vrf_id) 1625 { 1626 struct sctp_inpcb *inp; 1627 struct sctp_laddr *laddr; 1628 1629 #ifdef INET 1630 struct sockaddr_in *sin; 1631 1632 #endif 1633 #ifdef INET6 1634 struct sockaddr_in6 *sin6; 1635 struct sockaddr_in6 *intf_addr6; 1636 1637 #endif 1638 int fnd; 1639 1640 #ifdef INET 1641 sin = NULL; 1642 #endif 1643 #ifdef INET6 1644 sin6 = NULL; 1645 #endif 1646 switch (nam->sa_family) { 1647 #ifdef INET 1648 case AF_INET: 1649 sin = (struct sockaddr_in *)nam; 1650 break; 1651 #endif 1652 #ifdef INET6 1653 case AF_INET6: 1654 sin6 = (struct sockaddr_in6 *)nam; 1655 break; 1656 #endif 1657 default: 1658 /* unsupported family */ 1659 return (NULL); 1660 } 1661 1662 if (head == NULL) 1663 return (NULL); 1664 1665 LIST_FOREACH(inp, head, sctp_hash) { 1666 SCTP_INP_RLOCK(inp); 1667 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1668 SCTP_INP_RUNLOCK(inp); 1669 continue; 1670 } 1671 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1672 (inp->sctp_lport == lport)) { 1673 /* got it */ 1674 switch (nam->sa_family) { 1675 #ifdef INET 1676 case AF_INET: 1677 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1678 SCTP_IPV6_V6ONLY(inp)) { 1679 /* 1680 * IPv4 on a IPv6 socket with ONLY 1681 * IPv6 set 1682 */ 1683 SCTP_INP_RUNLOCK(inp); 1684 continue; 1685 } 1686 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1687 &sin->sin_addr) != 0) { 1688 SCTP_INP_RUNLOCK(inp); 1689 continue; 1690 } 1691 break; 1692 #endif 1693 #ifdef INET6 1694 case AF_INET6: 1695 /* 1696 * A V6 address and the endpoint is NOT 1697 * bound V6 1698 */ 1699 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1700 SCTP_INP_RUNLOCK(inp); 1701 continue; 1702 } 1703 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1704 &sin6->sin6_addr) != 0) { 1705 SCTP_INP_RUNLOCK(inp); 1706 continue; 1707 } 1708 break; 1709 #endif 1710 default: 1711 break; 1712 } 1713 /* does a VRF id match? */ 1714 fnd = 0; 1715 if (inp->def_vrf_id == vrf_id) 1716 fnd = 1; 1717 1718 SCTP_INP_RUNLOCK(inp); 1719 if (!fnd) 1720 continue; 1721 return (inp); 1722 } 1723 SCTP_INP_RUNLOCK(inp); 1724 } 1725 switch (nam->sa_family) { 1726 #ifdef INET 1727 case AF_INET: 1728 if (sin->sin_addr.s_addr == INADDR_ANY) { 1729 /* Can't hunt for one that has no address specified */ 1730 return (NULL); 1731 } 1732 break; 1733 #endif 1734 #ifdef INET6 1735 case AF_INET6: 1736 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1737 /* Can't hunt for one that has no address specified */ 1738 return (NULL); 1739 } 1740 break; 1741 #endif 1742 default: 1743 break; 1744 } 1745 /* 1746 * ok, not bound to all so see if we can find a EP bound to this 1747 * address. 1748 */ 1749 LIST_FOREACH(inp, head, sctp_hash) { 1750 SCTP_INP_RLOCK(inp); 1751 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1752 SCTP_INP_RUNLOCK(inp); 1753 continue; 1754 } 1755 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1756 SCTP_INP_RUNLOCK(inp); 1757 continue; 1758 } 1759 /* 1760 * Ok this could be a likely candidate, look at all of its 1761 * addresses 1762 */ 1763 if (inp->sctp_lport != lport) { 1764 SCTP_INP_RUNLOCK(inp); 1765 continue; 1766 } 1767 /* does a VRF id match? */ 1768 fnd = 0; 1769 if (inp->def_vrf_id == vrf_id) 1770 fnd = 1; 1771 1772 if (!fnd) { 1773 SCTP_INP_RUNLOCK(inp); 1774 continue; 1775 } 1776 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1777 if (laddr->ifa == NULL) { 1778 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1779 __FUNCTION__); 1780 continue; 1781 } 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1783 (void *)laddr->ifa); 1784 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1785 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1786 continue; 1787 } 1788 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1789 /* possible, see if it matches */ 1790 switch (nam->sa_family) { 1791 #ifdef INET 1792 case AF_INET: 1793 if (sin->sin_addr.s_addr == 1794 laddr->ifa->address.sin.sin_addr.s_addr) { 1795 SCTP_INP_RUNLOCK(inp); 1796 return (inp); 1797 } 1798 break; 1799 #endif 1800 #ifdef INET6 1801 case AF_INET6: 1802 intf_addr6 = &laddr->ifa->address.sin6; 1803 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1804 intf_addr6)) { 1805 SCTP_INP_RUNLOCK(inp); 1806 return (inp); 1807 } 1808 break; 1809 #endif 1810 } 1811 } 1812 } 1813 SCTP_INP_RUNLOCK(inp); 1814 } 1815 return (NULL); 1816 } 1817 1818 1819 static struct sctp_inpcb * 1820 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1821 { 1822 struct sctppcbhead *head; 1823 struct sctp_inpcb *t_inp; 1824 int fnd; 1825 1826 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1827 SCTP_BASE_INFO(hashmark))]; 1828 LIST_FOREACH(t_inp, head, sctp_hash) { 1829 if (t_inp->sctp_lport != lport) { 1830 continue; 1831 } 1832 /* is it in the VRF in question */ 1833 fnd = 0; 1834 if (t_inp->def_vrf_id == vrf_id) 1835 fnd = 1; 1836 if (!fnd) 1837 continue; 1838 1839 /* This one is in use. */ 1840 /* check the v6/v4 binding issue */ 1841 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1842 SCTP_IPV6_V6ONLY(t_inp)) { 1843 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1844 /* collision in V6 space */ 1845 return (t_inp); 1846 } else { 1847 /* inp is BOUND_V4 no conflict */ 1848 continue; 1849 } 1850 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1851 /* t_inp is bound v4 and v6, conflict always */ 1852 return (t_inp); 1853 } else { 1854 /* t_inp is bound only V4 */ 1855 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1856 SCTP_IPV6_V6ONLY(inp)) { 1857 /* no conflict */ 1858 continue; 1859 } 1860 /* else fall through to conflict */ 1861 } 1862 return (t_inp); 1863 } 1864 return (NULL); 1865 } 1866 1867 1868 int 1869 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1870 { 1871 /* For 1-2-1 with port reuse */ 1872 struct sctppcbhead *head; 1873 struct sctp_inpcb *tinp; 1874 1875 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1876 /* only works with port reuse on */ 1877 return (-1); 1878 } 1879 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1880 return (0); 1881 } 1882 SCTP_INP_RUNLOCK(inp); 1883 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1884 SCTP_BASE_INFO(hashmark))]; 1885 /* Kick out all non-listeners to the TCP hash */ 1886 LIST_FOREACH(tinp, head, sctp_hash) { 1887 if (tinp->sctp_lport != inp->sctp_lport) { 1888 continue; 1889 } 1890 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1891 continue; 1892 } 1893 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1894 continue; 1895 } 1896 if (tinp->sctp_socket->so_qlimit) { 1897 continue; 1898 } 1899 SCTP_INP_WLOCK(tinp); 1900 LIST_REMOVE(tinp, sctp_hash); 1901 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1902 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1903 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1904 SCTP_INP_WUNLOCK(tinp); 1905 } 1906 SCTP_INP_WLOCK(inp); 1907 /* Pull from where he was */ 1908 LIST_REMOVE(inp, sctp_hash); 1909 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1910 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1911 LIST_INSERT_HEAD(head, inp, sctp_hash); 1912 SCTP_INP_WUNLOCK(inp); 1913 SCTP_INP_RLOCK(inp); 1914 return (0); 1915 } 1916 1917 1918 struct sctp_inpcb * 1919 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1920 uint32_t vrf_id) 1921 { 1922 /* 1923 * First we check the hash table to see if someone has this port 1924 * bound with just the port. 1925 */ 1926 struct sctp_inpcb *inp; 1927 struct sctppcbhead *head; 1928 int lport; 1929 unsigned int i; 1930 1931 #ifdef INET 1932 struct sockaddr_in *sin; 1933 1934 #endif 1935 #ifdef INET6 1936 struct sockaddr_in6 *sin6; 1937 1938 #endif 1939 1940 switch (nam->sa_family) { 1941 #ifdef INET 1942 case AF_INET: 1943 sin = (struct sockaddr_in *)nam; 1944 lport = sin->sin_port; 1945 break; 1946 #endif 1947 #ifdef INET6 1948 case AF_INET6: 1949 sin6 = (struct sockaddr_in6 *)nam; 1950 lport = sin6->sin6_port; 1951 break; 1952 #endif 1953 default: 1954 return (NULL); 1955 } 1956 /* 1957 * I could cheat here and just cast to one of the types but we will 1958 * do it right. It also provides the check against an Unsupported 1959 * type too. 1960 */ 1961 /* Find the head of the ALLADDR chain */ 1962 if (have_lock == 0) { 1963 SCTP_INP_INFO_RLOCK(); 1964 } 1965 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1966 SCTP_BASE_INFO(hashmark))]; 1967 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1968 1969 /* 1970 * If the TCP model exists it could be that the main listening 1971 * endpoint is gone but there still exists a connected socket for 1972 * this guy. If so we can return the first one that we find. This 1973 * may NOT be the correct one so the caller should be wary on the 1974 * returned INP. Currently the only caller that sets find_tcp_pool 1975 * is in bindx where we are verifying that a user CAN bind the 1976 * address. He either has bound it already, or someone else has, or 1977 * its open to bind, so this is good enough. 1978 */ 1979 if (inp == NULL && find_tcp_pool) { 1980 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1981 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1982 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1983 if (inp) { 1984 break; 1985 } 1986 } 1987 } 1988 if (inp) { 1989 SCTP_INP_INCR_REF(inp); 1990 } 1991 if (have_lock == 0) { 1992 SCTP_INP_INFO_RUNLOCK(); 1993 } 1994 return (inp); 1995 } 1996 1997 1998 /* 1999 * Find an association for an endpoint with the pointer to whom you want to 2000 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2001 * need to change the *to to some other struct like a mbuf... 2002 */ 2003 struct sctp_tcb * 2004 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2005 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2006 uint32_t vrf_id) 2007 { 2008 struct sctp_inpcb *inp = NULL; 2009 struct sctp_tcb *stcb; 2010 2011 SCTP_INP_INFO_RLOCK(); 2012 if (find_tcp_pool) { 2013 if (inp_p != NULL) { 2014 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2015 vrf_id); 2016 } else { 2017 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2018 vrf_id); 2019 } 2020 if (stcb != NULL) { 2021 SCTP_INP_INFO_RUNLOCK(); 2022 return (stcb); 2023 } 2024 } 2025 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2026 if (inp_p != NULL) { 2027 *inp_p = inp; 2028 } 2029 SCTP_INP_INFO_RUNLOCK(); 2030 if (inp == NULL) { 2031 return (NULL); 2032 } 2033 /* 2034 * ok, we have an endpoint, now lets find the assoc for it (if any) 2035 * we now place the source address or from in the to of the find 2036 * endpoint call. Since in reality this chain is used from the 2037 * inbound packet side. 2038 */ 2039 if (inp_p != NULL) { 2040 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2041 NULL); 2042 } else { 2043 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2044 NULL); 2045 } 2046 return (stcb); 2047 } 2048 2049 2050 /* 2051 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2052 * find all addresses that the sender has specified in any address list. Each 2053 * address will be used to lookup the TCB and see if one exits. 2054 */ 2055 static struct sctp_tcb * 2056 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2057 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2058 struct sockaddr *dst) 2059 { 2060 struct sctp_paramhdr *phdr, parm_buf; 2061 2062 #if defined(INET) || defined(INET6) 2063 struct sctp_tcb *stcb; 2064 uint16_t ptype; 2065 2066 #endif 2067 uint16_t plen; 2068 2069 #ifdef INET 2070 struct sockaddr_in sin4; 2071 2072 #endif 2073 #ifdef INET6 2074 struct sockaddr_in6 sin6; 2075 2076 #endif 2077 2078 #ifdef INET 2079 memset(&sin4, 0, sizeof(sin4)); 2080 sin4.sin_len = sizeof(sin4); 2081 sin4.sin_family = AF_INET; 2082 sin4.sin_port = sh->src_port; 2083 #endif 2084 #ifdef INET6 2085 memset(&sin6, 0, sizeof(sin6)); 2086 sin6.sin6_len = sizeof(sin6); 2087 sin6.sin6_family = AF_INET6; 2088 sin6.sin6_port = sh->src_port; 2089 #endif 2090 2091 offset += sizeof(struct sctp_init_chunk); 2092 2093 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2094 while (phdr != NULL) { 2095 /* now we must see if we want the parameter */ 2096 #if defined(INET) || defined(INET6) 2097 ptype = ntohs(phdr->param_type); 2098 #endif 2099 plen = ntohs(phdr->param_length); 2100 if (plen == 0) { 2101 break; 2102 } 2103 #ifdef INET 2104 if (ptype == SCTP_IPV4_ADDRESS && 2105 plen == sizeof(struct sctp_ipv4addr_param)) { 2106 /* Get the rest of the address */ 2107 struct sctp_ipv4addr_param ip4_parm, *p4; 2108 2109 phdr = sctp_get_next_param(m, offset, 2110 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2111 if (phdr == NULL) { 2112 return (NULL); 2113 } 2114 p4 = (struct sctp_ipv4addr_param *)phdr; 2115 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2116 /* look it up */ 2117 stcb = sctp_findassociation_ep_addr(inp_p, 2118 (struct sockaddr *)&sin4, netp, dst, NULL); 2119 if (stcb != NULL) { 2120 return (stcb); 2121 } 2122 } 2123 #endif 2124 #ifdef INET6 2125 if (ptype == SCTP_IPV6_ADDRESS && 2126 plen == sizeof(struct sctp_ipv6addr_param)) { 2127 /* Get the rest of the address */ 2128 struct sctp_ipv6addr_param ip6_parm, *p6; 2129 2130 phdr = sctp_get_next_param(m, offset, 2131 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2132 if (phdr == NULL) { 2133 return (NULL); 2134 } 2135 p6 = (struct sctp_ipv6addr_param *)phdr; 2136 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2137 /* look it up */ 2138 stcb = sctp_findassociation_ep_addr(inp_p, 2139 (struct sockaddr *)&sin6, netp, dst, NULL); 2140 if (stcb != NULL) { 2141 return (stcb); 2142 } 2143 } 2144 #endif 2145 offset += SCTP_SIZE32(plen); 2146 phdr = sctp_get_next_param(m, offset, &parm_buf, 2147 sizeof(parm_buf)); 2148 } 2149 return (NULL); 2150 } 2151 2152 static struct sctp_tcb * 2153 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2154 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2155 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2156 { 2157 /* 2158 * Use my vtag to hash. If we find it we then verify the source addr 2159 * is in the assoc. If all goes well we save a bit on rec of a 2160 * packet. 2161 */ 2162 struct sctpasochead *head; 2163 struct sctp_nets *net; 2164 struct sctp_tcb *stcb; 2165 2166 SCTP_INP_INFO_RLOCK(); 2167 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2168 SCTP_BASE_INFO(hashasocmark))]; 2169 if (head == NULL) { 2170 /* invalid vtag */ 2171 SCTP_INP_INFO_RUNLOCK(); 2172 return (NULL); 2173 } 2174 LIST_FOREACH(stcb, head, sctp_asocs) { 2175 SCTP_INP_RLOCK(stcb->sctp_ep); 2176 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2177 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2178 continue; 2179 } 2180 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2181 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2182 continue; 2183 } 2184 SCTP_TCB_LOCK(stcb); 2185 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2186 if (stcb->asoc.my_vtag == vtag) { 2187 /* candidate */ 2188 if (stcb->rport != rport) { 2189 SCTP_TCB_UNLOCK(stcb); 2190 continue; 2191 } 2192 if (stcb->sctp_ep->sctp_lport != lport) { 2193 SCTP_TCB_UNLOCK(stcb); 2194 continue; 2195 } 2196 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 /* RRS:Need toaddr check here */ 2201 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2202 /* Endpoint does not own this address */ 2203 SCTP_TCB_UNLOCK(stcb); 2204 continue; 2205 } 2206 if (remote_tag) { 2207 /* 2208 * If we have both vtags that's all we match 2209 * on 2210 */ 2211 if (stcb->asoc.peer_vtag == remote_tag) { 2212 /* 2213 * If both tags match we consider it 2214 * conclusive and check NO 2215 * source/destination addresses 2216 */ 2217 goto conclusive; 2218 } 2219 } 2220 if (skip_src_check) { 2221 conclusive: 2222 if (from) { 2223 *netp = sctp_findnet(stcb, from); 2224 } else { 2225 *netp = NULL; /* unknown */ 2226 } 2227 if (inp_p) 2228 *inp_p = stcb->sctp_ep; 2229 SCTP_INP_INFO_RUNLOCK(); 2230 return (stcb); 2231 } 2232 net = sctp_findnet(stcb, from); 2233 if (net) { 2234 /* yep its him. */ 2235 *netp = net; 2236 SCTP_STAT_INCR(sctps_vtagexpress); 2237 *inp_p = stcb->sctp_ep; 2238 SCTP_INP_INFO_RUNLOCK(); 2239 return (stcb); 2240 } else { 2241 /* 2242 * not him, this should only happen in rare 2243 * cases so I peg it. 2244 */ 2245 SCTP_STAT_INCR(sctps_vtagbogus); 2246 } 2247 } 2248 SCTP_TCB_UNLOCK(stcb); 2249 } 2250 SCTP_INP_INFO_RUNLOCK(); 2251 return (NULL); 2252 } 2253 2254 2255 /* 2256 * Find an association with the pointer to the inbound IP packet. This can be 2257 * a IPv4 or IPv6 packet. 2258 */ 2259 struct sctp_tcb * 2260 sctp_findassociation_addr(struct mbuf *m, int offset, 2261 struct sockaddr *src, struct sockaddr *dst, 2262 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2263 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2264 { 2265 int find_tcp_pool; 2266 struct sctp_tcb *stcb; 2267 struct sctp_inpcb *inp; 2268 2269 if (sh->v_tag) { 2270 /* we only go down this path if vtag is non-zero */ 2271 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2272 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2273 if (stcb) { 2274 return (stcb); 2275 } 2276 } 2277 find_tcp_pool = 0; 2278 if ((ch->chunk_type != SCTP_INITIATION) && 2279 (ch->chunk_type != SCTP_INITIATION_ACK) && 2280 (ch->chunk_type != SCTP_COOKIE_ACK) && 2281 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2282 /* Other chunk types go to the tcp pool. */ 2283 find_tcp_pool = 1; 2284 } 2285 if (inp_p) { 2286 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2287 find_tcp_pool, vrf_id); 2288 inp = *inp_p; 2289 } else { 2290 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2291 find_tcp_pool, vrf_id); 2292 } 2293 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2294 if (stcb == NULL && inp) { 2295 /* Found a EP but not this address */ 2296 if ((ch->chunk_type == SCTP_INITIATION) || 2297 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2298 /*- 2299 * special hook, we do NOT return linp or an 2300 * association that is linked to an existing 2301 * association that is under the TCP pool (i.e. no 2302 * listener exists). The endpoint finding routine 2303 * will always find a listener before examining the 2304 * TCP pool. 2305 */ 2306 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2307 if (inp_p) { 2308 *inp_p = NULL; 2309 } 2310 return (NULL); 2311 } 2312 stcb = sctp_findassociation_special_addr(m, 2313 offset, sh, &inp, netp, dst); 2314 if (inp_p != NULL) { 2315 *inp_p = inp; 2316 } 2317 } 2318 } 2319 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2320 return (stcb); 2321 } 2322 2323 /* 2324 * lookup an association by an ASCONF lookup address. 2325 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2326 */ 2327 struct sctp_tcb * 2328 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2329 struct sockaddr *dst, struct sctphdr *sh, 2330 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2331 { 2332 struct sctp_tcb *stcb; 2333 union sctp_sockstore remote_store; 2334 struct sctp_paramhdr parm_buf, *phdr; 2335 int ptype; 2336 int zero_address = 0; 2337 2338 #ifdef INET 2339 struct sockaddr_in *sin; 2340 2341 #endif 2342 #ifdef INET6 2343 struct sockaddr_in6 *sin6; 2344 2345 #endif 2346 2347 memset(&remote_store, 0, sizeof(remote_store)); 2348 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2349 &parm_buf, sizeof(struct sctp_paramhdr)); 2350 if (phdr == NULL) { 2351 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2352 __FUNCTION__); 2353 return NULL; 2354 } 2355 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2356 /* get the correlation address */ 2357 switch (ptype) { 2358 #ifdef INET6 2359 case SCTP_IPV6_ADDRESS: 2360 { 2361 /* ipv6 address param */ 2362 struct sctp_ipv6addr_param *p6, p6_buf; 2363 2364 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2365 return NULL; 2366 } 2367 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2368 offset + sizeof(struct sctp_asconf_chunk), 2369 &p6_buf.ph, sizeof(*p6)); 2370 if (p6 == NULL) { 2371 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2372 __FUNCTION__); 2373 return (NULL); 2374 } 2375 sin6 = &remote_store.sin6; 2376 sin6->sin6_family = AF_INET6; 2377 sin6->sin6_len = sizeof(*sin6); 2378 sin6->sin6_port = sh->src_port; 2379 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2380 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2381 zero_address = 1; 2382 break; 2383 } 2384 #endif 2385 #ifdef INET 2386 case SCTP_IPV4_ADDRESS: 2387 { 2388 /* ipv4 address param */ 2389 struct sctp_ipv4addr_param *p4, p4_buf; 2390 2391 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2392 return NULL; 2393 } 2394 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2395 offset + sizeof(struct sctp_asconf_chunk), 2396 &p4_buf.ph, sizeof(*p4)); 2397 if (p4 == NULL) { 2398 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2399 __FUNCTION__); 2400 return (NULL); 2401 } 2402 sin = &remote_store.sin; 2403 sin->sin_family = AF_INET; 2404 sin->sin_len = sizeof(*sin); 2405 sin->sin_port = sh->src_port; 2406 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2407 if (sin->sin_addr.s_addr == INADDR_ANY) 2408 zero_address = 1; 2409 break; 2410 } 2411 #endif 2412 default: 2413 /* invalid address param type */ 2414 return NULL; 2415 } 2416 2417 if (zero_address) { 2418 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2419 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2420 if (stcb != NULL) { 2421 SCTP_INP_DECR_REF(*inp_p); 2422 } 2423 } else { 2424 stcb = sctp_findassociation_ep_addr(inp_p, 2425 &remote_store.sa, netp, 2426 dst, NULL); 2427 } 2428 return (stcb); 2429 } 2430 2431 2432 /* 2433 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2434 * addresses. This way if we don't get a bind we by default pick a ephemeral 2435 * port with all addresses bound. 2436 */ 2437 int 2438 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2439 { 2440 /* 2441 * we get called when a new endpoint starts up. We need to allocate 2442 * the sctp_inpcb structure from the zone and init it. Mark it as 2443 * unbound and find a port that we can use as an ephemeral with 2444 * INADDR_ANY. If the user binds later no problem we can then add in 2445 * the specific addresses. And setup the default parameters for the 2446 * EP. 2447 */ 2448 int i, error; 2449 struct sctp_inpcb *inp; 2450 struct sctp_pcb *m; 2451 struct timeval time; 2452 sctp_sharedkey_t *null_key; 2453 2454 error = 0; 2455 2456 SCTP_INP_INFO_WLOCK(); 2457 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2458 if (inp == NULL) { 2459 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2460 SCTP_INP_INFO_WUNLOCK(); 2461 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2462 return (ENOBUFS); 2463 } 2464 /* zap it */ 2465 bzero(inp, sizeof(*inp)); 2466 2467 /* bump generations */ 2468 /* setup socket pointers */ 2469 inp->sctp_socket = so; 2470 inp->ip_inp.inp.inp_socket = so; 2471 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2472 #ifdef INET6 2473 if (INP_SOCKAF(so) == AF_INET6) { 2474 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2475 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2476 } 2477 if (MODULE_GLOBAL(ip6_v6only)) { 2478 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2479 } 2480 } 2481 #endif 2482 inp->sctp_associd_counter = 1; 2483 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2484 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2485 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2486 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2487 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2488 if (SCTP_BASE_SYSCTL(sctp_auth_disable)) { 2489 inp->auth_supported = 0; 2490 } else { 2491 inp->auth_supported = 1; 2492 } 2493 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2494 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2495 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2496 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2497 /* init the small hash table we use to track asocid <-> tcb */ 2498 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2499 if (inp->sctp_asocidhash == NULL) { 2500 crfree(inp->ip_inp.inp.inp_cred); 2501 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2502 SCTP_INP_INFO_WUNLOCK(); 2503 return (ENOBUFS); 2504 } 2505 #ifdef IPSEC 2506 { 2507 struct inpcbpolicy *pcb_sp = NULL; 2508 2509 error = ipsec_init_policy(so, &pcb_sp); 2510 /* Arrange to share the policy */ 2511 inp->ip_inp.inp.inp_sp = pcb_sp; 2512 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2513 } 2514 if (error != 0) { 2515 crfree(inp->ip_inp.inp.inp_cred); 2516 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2517 SCTP_INP_INFO_WUNLOCK(); 2518 return error; 2519 } 2520 #endif /* IPSEC */ 2521 SCTP_INCR_EP_COUNT(); 2522 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2523 SCTP_INP_INFO_WUNLOCK(); 2524 2525 so->so_pcb = (caddr_t)inp; 2526 2527 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2528 /* UDP style socket */ 2529 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2530 SCTP_PCB_FLAGS_UNBOUND); 2531 /* Be sure it is NON-BLOCKING IO for UDP */ 2532 /* SCTP_SET_SO_NBIO(so); */ 2533 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2534 /* TCP style socket */ 2535 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2536 SCTP_PCB_FLAGS_UNBOUND); 2537 /* Be sure we have blocking IO by default */ 2538 SCTP_CLEAR_SO_NBIO(so); 2539 } else { 2540 /* 2541 * unsupported socket type (RAW, etc)- in case we missed it 2542 * in protosw 2543 */ 2544 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2545 so->so_pcb = NULL; 2546 crfree(inp->ip_inp.inp.inp_cred); 2547 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2548 return (EOPNOTSUPP); 2549 } 2550 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2551 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2552 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2553 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2554 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2555 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2556 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2557 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2558 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2559 } 2560 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2561 &inp->sctp_hashmark); 2562 if (inp->sctp_tcbhash == NULL) { 2563 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2564 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2565 so->so_pcb = NULL; 2566 crfree(inp->ip_inp.inp.inp_cred); 2567 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2568 return (ENOBUFS); 2569 } 2570 inp->def_vrf_id = vrf_id; 2571 2572 SCTP_INP_INFO_WLOCK(); 2573 SCTP_INP_LOCK_INIT(inp); 2574 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2575 SCTP_INP_READ_INIT(inp); 2576 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2577 /* lock the new ep */ 2578 SCTP_INP_WLOCK(inp); 2579 2580 /* add it to the info area */ 2581 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2582 SCTP_INP_INFO_WUNLOCK(); 2583 2584 TAILQ_INIT(&inp->read_queue); 2585 LIST_INIT(&inp->sctp_addr_list); 2586 2587 LIST_INIT(&inp->sctp_asoc_list); 2588 2589 #ifdef SCTP_TRACK_FREED_ASOCS 2590 /* TEMP CODE */ 2591 LIST_INIT(&inp->sctp_asoc_free_list); 2592 #endif 2593 /* Init the timer structure for signature change */ 2594 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2595 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2596 2597 /* now init the actual endpoint default data */ 2598 m = &inp->sctp_ep; 2599 2600 /* setup the base timeout information */ 2601 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2602 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2603 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2604 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2605 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2606 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2607 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2608 /* all max/min max are in ms */ 2609 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2610 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2611 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2612 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2613 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2614 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2615 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2616 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2617 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2618 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2619 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2620 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2621 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2622 2623 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2624 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2625 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2626 /* number of streams to pre-open on a association */ 2627 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2628 2629 /* Add adaptation cookie */ 2630 m->adaptation_layer_indicator = 0; 2631 m->adaptation_layer_indicator_provided = 0; 2632 2633 /* seed random number generator */ 2634 m->random_counter = 1; 2635 m->store_at = SCTP_SIGNATURE_SIZE; 2636 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2637 sctp_fill_random_store(m); 2638 2639 /* Minimum cookie size */ 2640 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2641 sizeof(struct sctp_state_cookie); 2642 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2643 2644 /* Setup the initial secret */ 2645 (void)SCTP_GETTIME_TIMEVAL(&time); 2646 m->time_of_secret_change = time.tv_sec; 2647 2648 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2649 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2650 } 2651 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2652 2653 /* How long is a cookie good for ? */ 2654 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2655 /* 2656 * Initialize authentication parameters 2657 */ 2658 m->local_hmacs = sctp_default_supported_hmaclist(); 2659 m->local_auth_chunks = sctp_alloc_chunklist(); 2660 if (inp->asconf_supported) { 2661 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2662 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2663 } 2664 m->default_dscp = 0; 2665 #ifdef INET6 2666 m->default_flowlabel = 0; 2667 #endif 2668 m->port = 0; /* encapsulation disabled by default */ 2669 LIST_INIT(&m->shared_keys); 2670 /* add default NULL key as key id 0 */ 2671 null_key = sctp_alloc_sharedkey(); 2672 sctp_insert_sharedkey(&m->shared_keys, null_key); 2673 SCTP_INP_WUNLOCK(inp); 2674 #ifdef SCTP_LOG_CLOSING 2675 sctp_log_closing(inp, NULL, 12); 2676 #endif 2677 return (error); 2678 } 2679 2680 2681 void 2682 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2683 struct sctp_tcb *stcb) 2684 { 2685 struct sctp_nets *net; 2686 uint16_t lport, rport; 2687 struct sctppcbhead *head; 2688 struct sctp_laddr *laddr, *oladdr; 2689 2690 atomic_add_int(&stcb->asoc.refcnt, 1); 2691 SCTP_TCB_UNLOCK(stcb); 2692 SCTP_INP_INFO_WLOCK(); 2693 SCTP_INP_WLOCK(old_inp); 2694 SCTP_INP_WLOCK(new_inp); 2695 SCTP_TCB_LOCK(stcb); 2696 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2697 2698 new_inp->sctp_ep.time_of_secret_change = 2699 old_inp->sctp_ep.time_of_secret_change; 2700 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2701 sizeof(old_inp->sctp_ep.secret_key)); 2702 new_inp->sctp_ep.current_secret_number = 2703 old_inp->sctp_ep.current_secret_number; 2704 new_inp->sctp_ep.last_secret_number = 2705 old_inp->sctp_ep.last_secret_number; 2706 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2707 2708 /* make it so new data pours into the new socket */ 2709 stcb->sctp_socket = new_inp->sctp_socket; 2710 stcb->sctp_ep = new_inp; 2711 2712 /* Copy the port across */ 2713 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2714 rport = stcb->rport; 2715 /* Pull the tcb from the old association */ 2716 LIST_REMOVE(stcb, sctp_tcbhash); 2717 LIST_REMOVE(stcb, sctp_tcblist); 2718 if (stcb->asoc.in_asocid_hash) { 2719 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2720 } 2721 /* Now insert the new_inp into the TCP connected hash */ 2722 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2723 2724 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2725 /* Its safe to access */ 2726 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2727 2728 /* Now move the tcb into the endpoint list */ 2729 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2730 /* 2731 * Question, do we even need to worry about the ep-hash since we 2732 * only have one connection? Probably not :> so lets get rid of it 2733 * and not suck up any kernel memory in that. 2734 */ 2735 if (stcb->asoc.in_asocid_hash) { 2736 struct sctpasochead *lhd; 2737 2738 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2739 new_inp->hashasocidmark)]; 2740 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2741 } 2742 /* Ok. Let's restart timer. */ 2743 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2744 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2745 stcb, net); 2746 } 2747 2748 SCTP_INP_INFO_WUNLOCK(); 2749 if (new_inp->sctp_tcbhash != NULL) { 2750 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2751 new_inp->sctp_tcbhash = NULL; 2752 } 2753 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2754 /* Subset bound, so copy in the laddr list from the old_inp */ 2755 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2756 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2757 if (laddr == NULL) { 2758 /* 2759 * Gak, what can we do? This assoc is really 2760 * HOSED. We probably should send an abort 2761 * here. 2762 */ 2763 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2764 continue; 2765 } 2766 SCTP_INCR_LADDR_COUNT(); 2767 bzero(laddr, sizeof(*laddr)); 2768 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2769 laddr->ifa = oladdr->ifa; 2770 atomic_add_int(&laddr->ifa->refcount, 1); 2771 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2772 sctp_nxt_addr); 2773 new_inp->laddr_count++; 2774 if (oladdr == stcb->asoc.last_used_address) { 2775 stcb->asoc.last_used_address = laddr; 2776 } 2777 } 2778 } 2779 /* 2780 * Now any running timers need to be adjusted since we really don't 2781 * care if they are running or not just blast in the new_inp into 2782 * all of them. 2783 */ 2784 2785 stcb->asoc.dack_timer.ep = (void *)new_inp; 2786 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2787 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2788 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2789 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2790 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2791 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2792 /* now what about the nets? */ 2793 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2794 net->pmtu_timer.ep = (void *)new_inp; 2795 net->hb_timer.ep = (void *)new_inp; 2796 net->rxt_timer.ep = (void *)new_inp; 2797 } 2798 SCTP_INP_WUNLOCK(new_inp); 2799 SCTP_INP_WUNLOCK(old_inp); 2800 } 2801 2802 2803 2804 2805 /* sctp_ifap is used to bypass normal local address validation checks */ 2806 int 2807 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2808 struct sctp_ifa *sctp_ifap, struct thread *p) 2809 { 2810 /* bind a ep to a socket address */ 2811 struct sctppcbhead *head; 2812 struct sctp_inpcb *inp, *inp_tmp; 2813 struct inpcb *ip_inp; 2814 int port_reuse_active = 0; 2815 int bindall; 2816 uint16_t lport; 2817 int error; 2818 uint32_t vrf_id; 2819 2820 lport = 0; 2821 bindall = 1; 2822 inp = (struct sctp_inpcb *)so->so_pcb; 2823 ip_inp = (struct inpcb *)so->so_pcb; 2824 #ifdef SCTP_DEBUG 2825 if (addr) { 2826 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2827 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2828 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2829 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2830 } 2831 #endif 2832 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2833 /* already did a bind, subsequent binds NOT allowed ! */ 2834 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2835 return (EINVAL); 2836 } 2837 #ifdef INVARIANTS 2838 if (p == NULL) 2839 panic("null proc/thread"); 2840 #endif 2841 if (addr != NULL) { 2842 switch (addr->sa_family) { 2843 #ifdef INET 2844 case AF_INET: 2845 { 2846 struct sockaddr_in *sin; 2847 2848 /* IPV6_V6ONLY socket? */ 2849 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2850 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2851 return (EINVAL); 2852 } 2853 if (addr->sa_len != sizeof(*sin)) { 2854 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2855 return (EINVAL); 2856 } 2857 sin = (struct sockaddr_in *)addr; 2858 lport = sin->sin_port; 2859 /* 2860 * For LOOPBACK the prison_local_ip4() call 2861 * will transmute the ip address to the 2862 * proper value. 2863 */ 2864 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2865 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2866 return (error); 2867 } 2868 if (sin->sin_addr.s_addr != INADDR_ANY) { 2869 bindall = 0; 2870 } 2871 break; 2872 } 2873 #endif 2874 #ifdef INET6 2875 case AF_INET6: 2876 { 2877 /* 2878 * Only for pure IPv6 Address. (No IPv4 2879 * Mapped!) 2880 */ 2881 struct sockaddr_in6 *sin6; 2882 2883 sin6 = (struct sockaddr_in6 *)addr; 2884 2885 if (addr->sa_len != sizeof(*sin6)) { 2886 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2887 return (EINVAL); 2888 } 2889 lport = sin6->sin6_port; 2890 /* 2891 * For LOOPBACK the prison_local_ip6() call 2892 * will transmute the ipv6 address to the 2893 * proper value. 2894 */ 2895 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2896 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2897 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2898 return (error); 2899 } 2900 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2901 bindall = 0; 2902 /* KAME hack: embed scopeid */ 2903 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2904 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2905 return (EINVAL); 2906 } 2907 } 2908 /* this must be cleared for ifa_ifwithaddr() */ 2909 sin6->sin6_scope_id = 0; 2910 break; 2911 } 2912 #endif 2913 default: 2914 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2915 return (EAFNOSUPPORT); 2916 } 2917 } 2918 SCTP_INP_INFO_WLOCK(); 2919 SCTP_INP_WLOCK(inp); 2920 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2921 vrf_id = inp->def_vrf_id; 2922 2923 /* increase our count due to the unlock we do */ 2924 SCTP_INP_INCR_REF(inp); 2925 if (lport) { 2926 /* 2927 * Did the caller specify a port? if so we must see if an ep 2928 * already has this one bound. 2929 */ 2930 /* got to be root to get at low ports */ 2931 if (ntohs(lport) < IPPORT_RESERVED) { 2932 if (p && (error = 2933 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2934 )) { 2935 SCTP_INP_DECR_REF(inp); 2936 SCTP_INP_WUNLOCK(inp); 2937 SCTP_INP_INFO_WUNLOCK(); 2938 return (error); 2939 } 2940 } 2941 SCTP_INP_WUNLOCK(inp); 2942 if (bindall) { 2943 vrf_id = inp->def_vrf_id; 2944 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2945 if (inp_tmp != NULL) { 2946 /* 2947 * lock guy returned and lower count note 2948 * that we are not bound so inp_tmp should 2949 * NEVER be inp. And it is this inp 2950 * (inp_tmp) that gets the reference bump, 2951 * so we must lower it. 2952 */ 2953 SCTP_INP_DECR_REF(inp_tmp); 2954 /* unlock info */ 2955 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2956 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2957 /* 2958 * Ok, must be one-2-one and 2959 * allowing port re-use 2960 */ 2961 port_reuse_active = 1; 2962 goto continue_anyway; 2963 } 2964 SCTP_INP_DECR_REF(inp); 2965 SCTP_INP_INFO_WUNLOCK(); 2966 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2967 return (EADDRINUSE); 2968 } 2969 } else { 2970 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2971 if (inp_tmp != NULL) { 2972 /* 2973 * lock guy returned and lower count note 2974 * that we are not bound so inp_tmp should 2975 * NEVER be inp. And it is this inp 2976 * (inp_tmp) that gets the reference bump, 2977 * so we must lower it. 2978 */ 2979 SCTP_INP_DECR_REF(inp_tmp); 2980 /* unlock info */ 2981 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2982 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2983 /* 2984 * Ok, must be one-2-one and 2985 * allowing port re-use 2986 */ 2987 port_reuse_active = 1; 2988 goto continue_anyway; 2989 } 2990 SCTP_INP_DECR_REF(inp); 2991 SCTP_INP_INFO_WUNLOCK(); 2992 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2993 return (EADDRINUSE); 2994 } 2995 } 2996 continue_anyway: 2997 SCTP_INP_WLOCK(inp); 2998 if (bindall) { 2999 /* verify that no lport is not used by a singleton */ 3000 if ((port_reuse_active == 0) && 3001 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 3002 /* Sorry someone already has this one bound */ 3003 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3004 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3005 port_reuse_active = 1; 3006 } else { 3007 SCTP_INP_DECR_REF(inp); 3008 SCTP_INP_WUNLOCK(inp); 3009 SCTP_INP_INFO_WUNLOCK(); 3010 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3011 return (EADDRINUSE); 3012 } 3013 } 3014 } 3015 } else { 3016 uint16_t first, last, candidate; 3017 uint16_t count; 3018 int done; 3019 3020 if (ip_inp->inp_flags & INP_HIGHPORT) { 3021 first = MODULE_GLOBAL(ipport_hifirstauto); 3022 last = MODULE_GLOBAL(ipport_hilastauto); 3023 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3024 if (p && (error = 3025 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3026 )) { 3027 SCTP_INP_DECR_REF(inp); 3028 SCTP_INP_WUNLOCK(inp); 3029 SCTP_INP_INFO_WUNLOCK(); 3030 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3031 return (error); 3032 } 3033 first = MODULE_GLOBAL(ipport_lowfirstauto); 3034 last = MODULE_GLOBAL(ipport_lowlastauto); 3035 } else { 3036 first = MODULE_GLOBAL(ipport_firstauto); 3037 last = MODULE_GLOBAL(ipport_lastauto); 3038 } 3039 if (first > last) { 3040 uint16_t temp; 3041 3042 temp = first; 3043 first = last; 3044 last = temp; 3045 } 3046 count = last - first + 1; /* number of candidates */ 3047 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3048 3049 done = 0; 3050 while (!done) { 3051 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3052 done = 1; 3053 } 3054 if (!done) { 3055 if (--count == 0) { 3056 SCTP_INP_DECR_REF(inp); 3057 SCTP_INP_WUNLOCK(inp); 3058 SCTP_INP_INFO_WUNLOCK(); 3059 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3060 return (EADDRINUSE); 3061 } 3062 if (candidate == last) 3063 candidate = first; 3064 else 3065 candidate = candidate + 1; 3066 } 3067 } 3068 lport = htons(candidate); 3069 } 3070 SCTP_INP_DECR_REF(inp); 3071 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3072 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3073 /* 3074 * this really should not happen. The guy did a non-blocking 3075 * bind and then did a close at the same time. 3076 */ 3077 SCTP_INP_WUNLOCK(inp); 3078 SCTP_INP_INFO_WUNLOCK(); 3079 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3080 return (EINVAL); 3081 } 3082 /* ok we look clear to give out this port, so lets setup the binding */ 3083 if (bindall) { 3084 /* binding to all addresses, so just set in the proper flags */ 3085 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3086 /* set the automatic addr changes from kernel flag */ 3087 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3088 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3089 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3090 } else { 3091 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3092 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3093 } 3094 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3095 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3096 } else { 3097 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3098 } 3099 /* 3100 * set the automatic mobility_base from kernel flag (by 3101 * micchie) 3102 */ 3103 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3105 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3106 } else { 3107 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3108 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3109 } 3110 /* 3111 * set the automatic mobility_fasthandoff from kernel flag 3112 * (by micchie) 3113 */ 3114 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3115 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3116 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3117 } else { 3118 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3119 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3120 } 3121 } else { 3122 /* 3123 * bind specific, make sure flags is off and add a new 3124 * address structure to the sctp_addr_list inside the ep 3125 * structure. 3126 * 3127 * We will need to allocate one and insert it at the head. The 3128 * socketopt call can just insert new addresses in there as 3129 * well. It will also have to do the embed scope kame hack 3130 * too (before adding). 3131 */ 3132 struct sctp_ifa *ifa; 3133 union sctp_sockstore store; 3134 3135 memset(&store, 0, sizeof(store)); 3136 switch (addr->sa_family) { 3137 #ifdef INET 3138 case AF_INET: 3139 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3140 store.sin.sin_port = 0; 3141 break; 3142 #endif 3143 #ifdef INET6 3144 case AF_INET6: 3145 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3146 store.sin6.sin6_port = 0; 3147 break; 3148 #endif 3149 default: 3150 break; 3151 } 3152 /* 3153 * first find the interface with the bound address need to 3154 * zero out the port to find the address! yuck! can't do 3155 * this earlier since need port for sctp_pcb_findep() 3156 */ 3157 if (sctp_ifap != NULL) { 3158 ifa = sctp_ifap; 3159 } else { 3160 /* 3161 * Note for BSD we hit here always other O/S's will 3162 * pass things in via the sctp_ifap argument 3163 * (Panda). 3164 */ 3165 ifa = sctp_find_ifa_by_addr(&store.sa, 3166 vrf_id, SCTP_ADDR_NOT_LOCKED); 3167 } 3168 if (ifa == NULL) { 3169 /* Can't find an interface with that address */ 3170 SCTP_INP_WUNLOCK(inp); 3171 SCTP_INP_INFO_WUNLOCK(); 3172 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3173 return (EADDRNOTAVAIL); 3174 } 3175 #ifdef INET6 3176 if (addr->sa_family == AF_INET6) { 3177 /* GAK, more FIXME IFA lock? */ 3178 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3179 /* Can't bind a non-existent addr. */ 3180 SCTP_INP_WUNLOCK(inp); 3181 SCTP_INP_INFO_WUNLOCK(); 3182 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3183 return (EINVAL); 3184 } 3185 } 3186 #endif 3187 /* we're not bound all */ 3188 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3189 /* allow bindx() to send ASCONF's for binding changes */ 3190 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3191 /* clear automatic addr changes from kernel flag */ 3192 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3193 3194 /* add this address to the endpoint list */ 3195 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3196 if (error != 0) { 3197 SCTP_INP_WUNLOCK(inp); 3198 SCTP_INP_INFO_WUNLOCK(); 3199 return (error); 3200 } 3201 inp->laddr_count++; 3202 } 3203 /* find the bucket */ 3204 if (port_reuse_active) { 3205 /* Put it into tcp 1-2-1 hash */ 3206 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3207 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3208 } else { 3209 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3210 } 3211 /* put it in the bucket */ 3212 LIST_INSERT_HEAD(head, inp, sctp_hash); 3213 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3214 (void *)head, ntohs(lport), port_reuse_active); 3215 /* set in the port */ 3216 inp->sctp_lport = lport; 3217 3218 /* turn off just the unbound flag */ 3219 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3220 SCTP_INP_WUNLOCK(inp); 3221 SCTP_INP_INFO_WUNLOCK(); 3222 return (0); 3223 } 3224 3225 3226 static void 3227 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3228 { 3229 struct sctp_iterator *it, *nit; 3230 3231 /* 3232 * We enter with the only the ITERATOR_LOCK in place and a write 3233 * lock on the inp_info stuff. 3234 */ 3235 it = sctp_it_ctl.cur_it; 3236 if (it && (it->vn != curvnet)) { 3237 /* Its not looking at our VNET */ 3238 return; 3239 } 3240 if (it && (it->inp == inp)) { 3241 /* 3242 * This is tricky and we hold the iterator lock, but when it 3243 * returns and gets the lock (when we release it) the 3244 * iterator will try to operate on inp. We need to stop that 3245 * from happening. But of course the iterator has a 3246 * reference on the stcb and inp. We can mark it and it will 3247 * stop. 3248 * 3249 * If its a single iterator situation, we set the end iterator 3250 * flag. Otherwise we set the iterator to go to the next 3251 * inp. 3252 * 3253 */ 3254 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3255 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3256 } else { 3257 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3258 } 3259 } 3260 /* 3261 * Now go through and remove any single reference to our inp that 3262 * may be still pending on the list 3263 */ 3264 SCTP_IPI_ITERATOR_WQ_LOCK(); 3265 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3266 if (it->vn != curvnet) { 3267 continue; 3268 } 3269 if (it->inp == inp) { 3270 /* This one points to me is it inp specific? */ 3271 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3272 /* Remove and free this one */ 3273 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3274 it, sctp_nxt_itr); 3275 if (it->function_atend != NULL) { 3276 (*it->function_atend) (it->pointer, it->val); 3277 } 3278 SCTP_FREE(it, SCTP_M_ITER); 3279 } else { 3280 it->inp = LIST_NEXT(it->inp, sctp_list); 3281 if (it->inp) { 3282 SCTP_INP_INCR_REF(it->inp); 3283 } 3284 } 3285 /* 3286 * When its put in the refcnt is incremented so decr 3287 * it 3288 */ 3289 SCTP_INP_DECR_REF(inp); 3290 } 3291 } 3292 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3293 } 3294 3295 /* release sctp_inpcb unbind the port */ 3296 void 3297 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3298 { 3299 /* 3300 * Here we free a endpoint. We must find it (if it is in the Hash 3301 * table) and remove it from there. Then we must also find it in the 3302 * overall list and remove it from there. After all removals are 3303 * complete then any timer has to be stopped. Then start the actual 3304 * freeing. a) Any local lists. b) Any associations. c) The hash of 3305 * all associations. d) finally the ep itself. 3306 */ 3307 struct sctp_tcb *asoc, *nasoc; 3308 struct sctp_laddr *laddr, *nladdr; 3309 struct inpcb *ip_pcb; 3310 struct socket *so; 3311 int being_refed = 0; 3312 struct sctp_queued_to_read *sq, *nsq; 3313 int cnt; 3314 sctp_sharedkey_t *shared_key, *nshared_key; 3315 3316 3317 #ifdef SCTP_LOG_CLOSING 3318 sctp_log_closing(inp, NULL, 0); 3319 #endif 3320 SCTP_ITERATOR_LOCK(); 3321 /* mark any iterators on the list or being processed */ 3322 sctp_iterator_inp_being_freed(inp); 3323 SCTP_ITERATOR_UNLOCK(); 3324 so = inp->sctp_socket; 3325 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3326 /* been here before.. eeks.. get out of here */ 3327 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3328 #ifdef SCTP_LOG_CLOSING 3329 sctp_log_closing(inp, NULL, 1); 3330 #endif 3331 return; 3332 } 3333 SCTP_ASOC_CREATE_LOCK(inp); 3334 SCTP_INP_INFO_WLOCK(); 3335 3336 SCTP_INP_WLOCK(inp); 3337 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3338 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3339 /* socket is gone, so no more wakeups allowed */ 3340 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3341 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3342 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3343 3344 } 3345 /* First time through we have the socket lock, after that no more. */ 3346 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3347 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3348 3349 if (inp->control) { 3350 sctp_m_freem(inp->control); 3351 inp->control = NULL; 3352 } 3353 if (inp->pkt) { 3354 sctp_m_freem(inp->pkt); 3355 inp->pkt = NULL; 3356 } 3357 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3358 * here but I will be nice :> (i.e. 3359 * ip_pcb = ep;) */ 3360 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3361 int cnt_in_sd; 3362 3363 cnt_in_sd = 0; 3364 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3365 SCTP_TCB_LOCK(asoc); 3366 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3367 /* Skip guys being freed */ 3368 cnt_in_sd++; 3369 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3370 /* 3371 * Special case - we did not start a 3372 * kill timer on the asoc due to it 3373 * was not closed. So go ahead and 3374 * start it now. 3375 */ 3376 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3377 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3378 } 3379 SCTP_TCB_UNLOCK(asoc); 3380 continue; 3381 } 3382 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3383 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3384 (asoc->asoc.total_output_queue_size == 0)) { 3385 /* 3386 * If we have data in queue, we don't want 3387 * to just free since the app may have done, 3388 * send()/close or connect/send/close. And 3389 * it wants the data to get across first. 3390 */ 3391 /* Just abandon things in the front states */ 3392 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3393 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3394 cnt_in_sd++; 3395 } 3396 continue; 3397 } 3398 /* Disconnect the socket please */ 3399 asoc->sctp_socket = NULL; 3400 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3401 if ((asoc->asoc.size_on_reasm_queue > 0) || 3402 (asoc->asoc.control_pdapi) || 3403 (asoc->asoc.size_on_all_streams > 0) || 3404 (so && (so->so_rcv.sb_cc > 0))) { 3405 /* Left with Data unread */ 3406 struct mbuf *op_err; 3407 3408 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3409 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3410 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3411 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3412 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3413 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3414 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3415 } 3416 if (sctp_free_assoc(inp, asoc, 3417 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3418 cnt_in_sd++; 3419 } 3420 continue; 3421 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3422 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3423 (asoc->asoc.stream_queue_cnt == 0)) { 3424 if (asoc->asoc.locked_on_sending) { 3425 goto abort_anyway; 3426 } 3427 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3428 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3429 struct sctp_nets *netp; 3430 3431 /* 3432 * there is nothing queued to send, 3433 * so I send shutdown 3434 */ 3435 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3436 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3437 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3438 } 3439 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3440 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3441 sctp_stop_timers_for_shutdown(asoc); 3442 if (asoc->asoc.alternate) { 3443 netp = asoc->asoc.alternate; 3444 } else { 3445 netp = asoc->asoc.primary_destination; 3446 } 3447 sctp_send_shutdown(asoc, netp); 3448 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3449 netp); 3450 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3451 asoc->asoc.primary_destination); 3452 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3453 } 3454 } else { 3455 /* mark into shutdown pending */ 3456 struct sctp_stream_queue_pending *sp; 3457 3458 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3459 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3460 asoc->asoc.primary_destination); 3461 if (asoc->asoc.locked_on_sending) { 3462 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3463 sctp_streamhead); 3464 if (sp == NULL) { 3465 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3466 (void *)asoc->asoc.locked_on_sending, 3467 asoc->asoc.locked_on_sending->stream_no); 3468 } else { 3469 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3470 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3471 } 3472 } 3473 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3474 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3475 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3476 struct mbuf *op_err; 3477 3478 abort_anyway: 3479 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3480 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3481 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3482 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3483 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3484 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3485 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3486 } 3487 if (sctp_free_assoc(inp, asoc, 3488 SCTP_PCBFREE_NOFORCE, 3489 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3490 cnt_in_sd++; 3491 } 3492 continue; 3493 } else { 3494 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3495 } 3496 } 3497 cnt_in_sd++; 3498 SCTP_TCB_UNLOCK(asoc); 3499 } 3500 /* now is there some left in our SHUTDOWN state? */ 3501 if (cnt_in_sd) { 3502 #ifdef SCTP_LOG_CLOSING 3503 sctp_log_closing(inp, NULL, 2); 3504 #endif 3505 inp->sctp_socket = NULL; 3506 SCTP_INP_WUNLOCK(inp); 3507 SCTP_ASOC_CREATE_UNLOCK(inp); 3508 SCTP_INP_INFO_WUNLOCK(); 3509 return; 3510 } 3511 } 3512 inp->sctp_socket = NULL; 3513 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3514 SCTP_PCB_FLAGS_UNBOUND) { 3515 /* 3516 * ok, this guy has been bound. It's port is somewhere in 3517 * the SCTP_BASE_INFO(hash table). Remove it! 3518 */ 3519 LIST_REMOVE(inp, sctp_hash); 3520 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3521 } 3522 /* 3523 * If there is a timer running to kill us, forget it, since it may 3524 * have a contest on the INP lock.. which would cause us to die ... 3525 */ 3526 cnt = 0; 3527 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3528 SCTP_TCB_LOCK(asoc); 3529 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3530 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3531 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3532 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3533 } 3534 cnt++; 3535 SCTP_TCB_UNLOCK(asoc); 3536 continue; 3537 } 3538 /* Free associations that are NOT killing us */ 3539 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3540 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3541 struct mbuf *op_err; 3542 3543 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3544 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3545 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3546 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3547 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3548 cnt++; 3549 SCTP_TCB_UNLOCK(asoc); 3550 continue; 3551 } 3552 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3553 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3554 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3555 } 3556 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3557 cnt++; 3558 } 3559 } 3560 if (cnt) { 3561 /* Ok we have someone out there that will kill us */ 3562 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3563 #ifdef SCTP_LOG_CLOSING 3564 sctp_log_closing(inp, NULL, 3); 3565 #endif 3566 SCTP_INP_WUNLOCK(inp); 3567 SCTP_ASOC_CREATE_UNLOCK(inp); 3568 SCTP_INP_INFO_WUNLOCK(); 3569 return; 3570 } 3571 if (SCTP_INP_LOCK_CONTENDED(inp)) 3572 being_refed++; 3573 if (SCTP_INP_READ_CONTENDED(inp)) 3574 being_refed++; 3575 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3576 being_refed++; 3577 3578 if ((inp->refcount) || 3579 (being_refed) || 3580 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3581 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3582 #ifdef SCTP_LOG_CLOSING 3583 sctp_log_closing(inp, NULL, 4); 3584 #endif 3585 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3586 SCTP_INP_WUNLOCK(inp); 3587 SCTP_ASOC_CREATE_UNLOCK(inp); 3588 SCTP_INP_INFO_WUNLOCK(); 3589 return; 3590 } 3591 inp->sctp_ep.signature_change.type = 0; 3592 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3593 /* 3594 * Remove it from the list .. last thing we need a lock for. 3595 */ 3596 LIST_REMOVE(inp, sctp_list); 3597 SCTP_INP_WUNLOCK(inp); 3598 SCTP_ASOC_CREATE_UNLOCK(inp); 3599 SCTP_INP_INFO_WUNLOCK(); 3600 /* 3601 * Now we release all locks. Since this INP cannot be found anymore 3602 * except possibly by the kill timer that might be running. We call 3603 * the drain function here. It should hit the case were it sees the 3604 * ACTIVE flag cleared and exit out freeing us to proceed and 3605 * destroy everything. 3606 */ 3607 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3608 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3609 } else { 3610 /* Probably un-needed */ 3611 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3612 } 3613 3614 #ifdef SCTP_LOG_CLOSING 3615 sctp_log_closing(inp, NULL, 5); 3616 #endif 3617 3618 3619 if ((inp->sctp_asocidhash) != NULL) { 3620 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3621 inp->sctp_asocidhash = NULL; 3622 } 3623 /* sa_ignore FREED_MEMORY */ 3624 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3625 /* Its only abandoned if it had data left */ 3626 if (sq->length) 3627 SCTP_STAT_INCR(sctps_left_abandon); 3628 3629 TAILQ_REMOVE(&inp->read_queue, sq, next); 3630 sctp_free_remote_addr(sq->whoFrom); 3631 if (so) 3632 so->so_rcv.sb_cc -= sq->length; 3633 if (sq->data) { 3634 sctp_m_freem(sq->data); 3635 sq->data = NULL; 3636 } 3637 /* 3638 * no need to free the net count, since at this point all 3639 * assoc's are gone. 3640 */ 3641 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3642 SCTP_DECR_READQ_COUNT(); 3643 } 3644 /* Now the sctp_pcb things */ 3645 /* 3646 * free each asoc if it is not already closed/free. we can't use the 3647 * macro here since le_next will get freed as part of the 3648 * sctp_free_assoc() call. 3649 */ 3650 if (so) { 3651 #ifdef IPSEC 3652 ipsec_delete_pcbpolicy(ip_pcb); 3653 #endif /* IPSEC */ 3654 3655 /* Unlocks not needed since the socket is gone now */ 3656 } 3657 if (ip_pcb->inp_options) { 3658 (void)sctp_m_free(ip_pcb->inp_options); 3659 ip_pcb->inp_options = 0; 3660 } 3661 #ifdef INET6 3662 if (ip_pcb->inp_vflag & INP_IPV6) { 3663 struct in6pcb *in6p; 3664 3665 in6p = (struct in6pcb *)inp; 3666 ip6_freepcbopts(in6p->in6p_outputopts); 3667 } 3668 #endif /* INET6 */ 3669 ip_pcb->inp_vflag = 0; 3670 /* free up authentication fields */ 3671 if (inp->sctp_ep.local_auth_chunks != NULL) 3672 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3673 if (inp->sctp_ep.local_hmacs != NULL) 3674 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3675 3676 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3677 LIST_REMOVE(shared_key, next); 3678 sctp_free_sharedkey(shared_key); 3679 /* sa_ignore FREED_MEMORY */ 3680 } 3681 3682 /* 3683 * if we have an address list the following will free the list of 3684 * ifaddr's that are set into this ep. Again macro limitations here, 3685 * since the LIST_FOREACH could be a bad idea. 3686 */ 3687 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3688 sctp_remove_laddr(laddr); 3689 } 3690 3691 #ifdef SCTP_TRACK_FREED_ASOCS 3692 /* TEMP CODE */ 3693 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3694 LIST_REMOVE(asoc, sctp_tcblist); 3695 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3696 SCTP_DECR_ASOC_COUNT(); 3697 } 3698 /* *** END TEMP CODE *** */ 3699 #endif 3700 /* Now lets see about freeing the EP hash table. */ 3701 if (inp->sctp_tcbhash != NULL) { 3702 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3703 inp->sctp_tcbhash = NULL; 3704 } 3705 /* Now we must put the ep memory back into the zone pool */ 3706 crfree(inp->ip_inp.inp.inp_cred); 3707 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3708 SCTP_INP_LOCK_DESTROY(inp); 3709 SCTP_INP_READ_DESTROY(inp); 3710 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3711 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3712 SCTP_DECR_EP_COUNT(); 3713 } 3714 3715 3716 struct sctp_nets * 3717 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3718 { 3719 struct sctp_nets *net; 3720 3721 /* locate the address */ 3722 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3723 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3724 return (net); 3725 } 3726 return (NULL); 3727 } 3728 3729 3730 int 3731 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3732 { 3733 struct sctp_ifa *sctp_ifa; 3734 3735 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3736 if (sctp_ifa) { 3737 return (1); 3738 } else { 3739 return (0); 3740 } 3741 } 3742 3743 /* 3744 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3745 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3746 * stats of stuff. 3747 */ 3748 int 3749 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3750 struct sctp_nets **netp, int set_scope, int from) 3751 { 3752 /* 3753 * The following is redundant to the same lines in the 3754 * sctp_aloc_assoc() but is needed since others call the add address 3755 * function 3756 */ 3757 struct sctp_nets *net, *netfirst; 3758 int addr_inscope; 3759 3760 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3761 from); 3762 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3763 3764 netfirst = sctp_findnet(stcb, newaddr); 3765 if (netfirst) { 3766 /* 3767 * Lie and return ok, we don't want to make the association 3768 * go away for this behavior. It will happen in the TCP 3769 * model in a connected socket. It does not reach the hash 3770 * table until after the association is built so it can't be 3771 * found. Mark as reachable, since the initial creation will 3772 * have been cleared and the NOT_IN_ASSOC flag will have 3773 * been added... and we don't want to end up removing it 3774 * back out. 3775 */ 3776 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3777 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3778 SCTP_ADDR_UNCONFIRMED); 3779 } else { 3780 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3781 } 3782 3783 return (0); 3784 } 3785 addr_inscope = 1; 3786 switch (newaddr->sa_family) { 3787 #ifdef INET 3788 case AF_INET: 3789 { 3790 struct sockaddr_in *sin; 3791 3792 sin = (struct sockaddr_in *)newaddr; 3793 if (sin->sin_addr.s_addr == 0) { 3794 /* Invalid address */ 3795 return (-1); 3796 } 3797 /* zero out the bzero area */ 3798 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3799 3800 /* assure len is set */ 3801 sin->sin_len = sizeof(struct sockaddr_in); 3802 if (set_scope) { 3803 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3804 stcb->asoc.scope.ipv4_local_scope = 1; 3805 #else 3806 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3807 stcb->asoc.scope.ipv4_local_scope = 1; 3808 } 3809 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3810 } else { 3811 /* Validate the address is in scope */ 3812 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3813 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3814 addr_inscope = 0; 3815 } 3816 } 3817 break; 3818 } 3819 #endif 3820 #ifdef INET6 3821 case AF_INET6: 3822 { 3823 struct sockaddr_in6 *sin6; 3824 3825 sin6 = (struct sockaddr_in6 *)newaddr; 3826 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3827 /* Invalid address */ 3828 return (-1); 3829 } 3830 /* assure len is set */ 3831 sin6->sin6_len = sizeof(struct sockaddr_in6); 3832 if (set_scope) { 3833 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3834 stcb->asoc.scope.loopback_scope = 1; 3835 stcb->asoc.scope.local_scope = 0; 3836 stcb->asoc.scope.ipv4_local_scope = 1; 3837 stcb->asoc.scope.site_scope = 1; 3838 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3839 /* 3840 * If the new destination is a 3841 * LINK_LOCAL we must have common 3842 * site scope. Don't set the local 3843 * scope since we may not share all 3844 * links, only loopback can do this. 3845 * Links on the local network would 3846 * also be on our private network 3847 * for v4 too. 3848 */ 3849 stcb->asoc.scope.ipv4_local_scope = 1; 3850 stcb->asoc.scope.site_scope = 1; 3851 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3852 /* 3853 * If the new destination is 3854 * SITE_LOCAL then we must have site 3855 * scope in common. 3856 */ 3857 stcb->asoc.scope.site_scope = 1; 3858 } 3859 } else { 3860 /* Validate the address is in scope */ 3861 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3862 (stcb->asoc.scope.loopback_scope == 0)) { 3863 addr_inscope = 0; 3864 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3865 (stcb->asoc.scope.local_scope == 0)) { 3866 addr_inscope = 0; 3867 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3868 (stcb->asoc.scope.site_scope == 0)) { 3869 addr_inscope = 0; 3870 } 3871 } 3872 break; 3873 } 3874 #endif 3875 default: 3876 /* not supported family type */ 3877 return (-1); 3878 } 3879 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3880 if (net == NULL) { 3881 return (-1); 3882 } 3883 SCTP_INCR_RADDR_COUNT(); 3884 bzero(net, sizeof(struct sctp_nets)); 3885 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3886 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3887 switch (newaddr->sa_family) { 3888 #ifdef INET 3889 case AF_INET: 3890 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3891 break; 3892 #endif 3893 #ifdef INET6 3894 case AF_INET6: 3895 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3896 break; 3897 #endif 3898 default: 3899 break; 3900 } 3901 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3902 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3903 stcb->asoc.scope.loopback_scope = 1; 3904 stcb->asoc.scope.ipv4_local_scope = 1; 3905 stcb->asoc.scope.local_scope = 0; 3906 stcb->asoc.scope.site_scope = 1; 3907 addr_inscope = 1; 3908 } 3909 net->failure_threshold = stcb->asoc.def_net_failure; 3910 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3911 if (addr_inscope == 0) { 3912 net->dest_state = (SCTP_ADDR_REACHABLE | 3913 SCTP_ADDR_OUT_OF_SCOPE); 3914 } else { 3915 if (from == SCTP_ADDR_IS_CONFIRMED) 3916 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3917 net->dest_state = SCTP_ADDR_REACHABLE; 3918 else 3919 net->dest_state = SCTP_ADDR_REACHABLE | 3920 SCTP_ADDR_UNCONFIRMED; 3921 } 3922 /* 3923 * We set this to 0, the timer code knows that this means its an 3924 * initial value 3925 */ 3926 net->rto_needed = 1; 3927 net->RTO = 0; 3928 net->RTO_measured = 0; 3929 stcb->asoc.numnets++; 3930 net->ref_count = 1; 3931 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3932 net->port = stcb->asoc.port; 3933 net->dscp = stcb->asoc.default_dscp; 3934 #ifdef INET6 3935 net->flowlabel = stcb->asoc.default_flowlabel; 3936 #endif 3937 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3938 net->dest_state |= SCTP_ADDR_NOHB; 3939 } else { 3940 net->dest_state &= ~SCTP_ADDR_NOHB; 3941 } 3942 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3943 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3944 } else { 3945 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3946 } 3947 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3948 /* Init the timer structure */ 3949 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3950 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3951 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3952 3953 /* Now generate a route for this guy */ 3954 #ifdef INET6 3955 /* KAME hack: embed scopeid */ 3956 if (newaddr->sa_family == AF_INET6) { 3957 struct sockaddr_in6 *sin6; 3958 3959 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3960 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3961 sin6->sin6_scope_id = 0; 3962 } 3963 #endif 3964 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3965 3966 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3967 /* Get source address */ 3968 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3969 stcb, 3970 (sctp_route_t *) & net->ro, 3971 net, 3972 0, 3973 stcb->asoc.vrf_id); 3974 if (net->ro._s_addr != NULL) { 3975 net->src_addr_selected = 1; 3976 /* Now get the interface MTU */ 3977 if (net->ro._s_addr->ifn_p != NULL) { 3978 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3979 } 3980 } else { 3981 net->src_addr_selected = 0; 3982 } 3983 if (net->mtu > 0) { 3984 uint32_t rmtu; 3985 3986 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3987 if (rmtu == 0) { 3988 /* 3989 * Start things off to match mtu of 3990 * interface please. 3991 */ 3992 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3993 net->ro.ro_rt, net->mtu); 3994 } else { 3995 /* 3996 * we take the route mtu over the interface, 3997 * since the route may be leading out the 3998 * loopback, or a different interface. 3999 */ 4000 net->mtu = rmtu; 4001 } 4002 } 4003 } else { 4004 net->src_addr_selected = 0; 4005 } 4006 if (net->mtu == 0) { 4007 switch (newaddr->sa_family) { 4008 #ifdef INET 4009 case AF_INET: 4010 net->mtu = SCTP_DEFAULT_MTU; 4011 break; 4012 #endif 4013 #ifdef INET6 4014 case AF_INET6: 4015 net->mtu = 1280; 4016 break; 4017 #endif 4018 default: 4019 break; 4020 } 4021 } 4022 #if defined(INET) || defined(INET6) 4023 if (net->port) { 4024 net->mtu -= (uint32_t) sizeof(struct udphdr); 4025 } 4026 #endif 4027 if (from == SCTP_ALLOC_ASOC) { 4028 stcb->asoc.smallest_mtu = net->mtu; 4029 } 4030 if (stcb->asoc.smallest_mtu > net->mtu) { 4031 stcb->asoc.smallest_mtu = net->mtu; 4032 } 4033 #ifdef INET6 4034 if (newaddr->sa_family == AF_INET6) { 4035 struct sockaddr_in6 *sin6; 4036 4037 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4038 (void)sa6_recoverscope(sin6); 4039 } 4040 #endif 4041 4042 /* JRS - Use the congestion control given in the CC module */ 4043 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4044 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4045 4046 /* 4047 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4048 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4049 */ 4050 net->find_pseudo_cumack = 1; 4051 net->find_rtx_pseudo_cumack = 1; 4052 /* Choose an initial flowid. */ 4053 net->flowid = stcb->asoc.my_vtag ^ 4054 ntohs(stcb->rport) ^ 4055 ntohs(stcb->sctp_ep->sctp_lport); 4056 #ifdef INVARIANTS 4057 net->flowidset = 1; 4058 #endif 4059 if (netp) { 4060 *netp = net; 4061 } 4062 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4063 if (net->ro.ro_rt == NULL) { 4064 /* Since we have no route put it at the back */ 4065 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4066 } else if (netfirst == NULL) { 4067 /* We are the first one in the pool. */ 4068 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4069 } else if (netfirst->ro.ro_rt == NULL) { 4070 /* 4071 * First one has NO route. Place this one ahead of the first 4072 * one. 4073 */ 4074 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4075 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4076 /* 4077 * This one has a different interface than the one at the 4078 * top of the list. Place it ahead. 4079 */ 4080 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4081 } else { 4082 /* 4083 * Ok we have the same interface as the first one. Move 4084 * forward until we find either a) one with a NULL route... 4085 * insert ahead of that b) one with a different ifp.. insert 4086 * after that. c) end of the list.. insert at the tail. 4087 */ 4088 struct sctp_nets *netlook; 4089 4090 do { 4091 netlook = TAILQ_NEXT(netfirst, sctp_next); 4092 if (netlook == NULL) { 4093 /* End of the list */ 4094 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4095 break; 4096 } else if (netlook->ro.ro_rt == NULL) { 4097 /* next one has NO route */ 4098 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4099 break; 4100 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4101 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4102 net, sctp_next); 4103 break; 4104 } 4105 /* Shift forward */ 4106 netfirst = netlook; 4107 } while (netlook != NULL); 4108 } 4109 4110 /* got to have a primary set */ 4111 if (stcb->asoc.primary_destination == 0) { 4112 stcb->asoc.primary_destination = net; 4113 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4114 (net->ro.ro_rt) && 4115 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4116 /* No route to current primary adopt new primary */ 4117 stcb->asoc.primary_destination = net; 4118 } 4119 /* Validate primary is first */ 4120 net = TAILQ_FIRST(&stcb->asoc.nets); 4121 if ((net != stcb->asoc.primary_destination) && 4122 (stcb->asoc.primary_destination)) { 4123 /* 4124 * first one on the list is NOT the primary sctp_cmpaddr() 4125 * is much more efficient if the primary is the first on the 4126 * list, make it so. 4127 */ 4128 TAILQ_REMOVE(&stcb->asoc.nets, 4129 stcb->asoc.primary_destination, sctp_next); 4130 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4131 stcb->asoc.primary_destination, sctp_next); 4132 } 4133 return (0); 4134 } 4135 4136 4137 static uint32_t 4138 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4139 { 4140 uint32_t id; 4141 struct sctpasochead *head; 4142 struct sctp_tcb *lstcb; 4143 4144 SCTP_INP_WLOCK(inp); 4145 try_again: 4146 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4147 /* TSNH */ 4148 SCTP_INP_WUNLOCK(inp); 4149 return (0); 4150 } 4151 /* 4152 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4153 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4154 */ 4155 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4156 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4157 } 4158 id = inp->sctp_associd_counter; 4159 inp->sctp_associd_counter++; 4160 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4161 if (lstcb) { 4162 goto try_again; 4163 } 4164 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4165 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4166 stcb->asoc.in_asocid_hash = 1; 4167 SCTP_INP_WUNLOCK(inp); 4168 return id; 4169 } 4170 4171 /* 4172 * allocate an association and add it to the endpoint. The caller must be 4173 * careful to add all additional addresses once they are know right away or 4174 * else the assoc will be may experience a blackout scenario. 4175 */ 4176 struct sctp_tcb * 4177 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4178 int *error, uint32_t override_tag, uint32_t vrf_id, 4179 struct thread *p 4180 ) 4181 { 4182 /* note the p argument is only valid in unbound sockets */ 4183 4184 struct sctp_tcb *stcb; 4185 struct sctp_association *asoc; 4186 struct sctpasochead *head; 4187 uint16_t rport; 4188 int err; 4189 4190 /* 4191 * Assumption made here: Caller has done a 4192 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4193 * address does not exist already. 4194 */ 4195 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4196 /* Hit max assoc, sorry no more */ 4197 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4198 *error = ENOBUFS; 4199 return (NULL); 4200 } 4201 if (firstaddr == NULL) { 4202 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4203 *error = EINVAL; 4204 return (NULL); 4205 } 4206 SCTP_INP_RLOCK(inp); 4207 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4208 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4209 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4210 /* 4211 * If its in the TCP pool, its NOT allowed to create an 4212 * association. The parent listener needs to call 4213 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4214 * off, or connected one does this.. its an error. 4215 */ 4216 SCTP_INP_RUNLOCK(inp); 4217 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4218 *error = EINVAL; 4219 return (NULL); 4220 } 4221 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4222 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4223 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4224 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4225 SCTP_INP_RUNLOCK(inp); 4226 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4227 *error = EINVAL; 4228 return (NULL); 4229 } 4230 } 4231 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4232 #ifdef SCTP_DEBUG 4233 if (firstaddr) { 4234 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4235 switch (firstaddr->sa_family) { 4236 #ifdef INET 4237 case AF_INET: 4238 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4239 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4240 break; 4241 #endif 4242 #ifdef INET6 4243 case AF_INET6: 4244 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4245 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4246 break; 4247 #endif 4248 default: 4249 break; 4250 } 4251 } else { 4252 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4253 } 4254 #endif /* SCTP_DEBUG */ 4255 switch (firstaddr->sa_family) { 4256 #ifdef INET 4257 case AF_INET: 4258 { 4259 struct sockaddr_in *sin; 4260 4261 sin = (struct sockaddr_in *)firstaddr; 4262 if ((ntohs(sin->sin_port) == 0) || 4263 (sin->sin_addr.s_addr == INADDR_ANY) || 4264 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4265 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4266 /* Invalid address */ 4267 SCTP_INP_RUNLOCK(inp); 4268 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4269 *error = EINVAL; 4270 return (NULL); 4271 } 4272 rport = sin->sin_port; 4273 break; 4274 } 4275 #endif 4276 #ifdef INET6 4277 case AF_INET6: 4278 { 4279 struct sockaddr_in6 *sin6; 4280 4281 sin6 = (struct sockaddr_in6 *)firstaddr; 4282 if ((ntohs(sin6->sin6_port) == 0) || 4283 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4284 IN6_IS_ADDR_MULTICAST(&sin6->sin6_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 = sin6->sin6_port; 4292 break; 4293 } 4294 #endif 4295 default: 4296 /* not supported family type */ 4297 SCTP_INP_RUNLOCK(inp); 4298 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4299 *error = EINVAL; 4300 return (NULL); 4301 } 4302 SCTP_INP_RUNLOCK(inp); 4303 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4304 /* 4305 * If you have not performed a bind, then we need to do the 4306 * ephemeral bind for you. 4307 */ 4308 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4309 (struct sockaddr *)NULL, 4310 (struct sctp_ifa *)NULL, 4311 p 4312 ))) { 4313 /* bind error, probably perm */ 4314 *error = err; 4315 return (NULL); 4316 } 4317 } 4318 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4319 if (stcb == NULL) { 4320 /* out of memory? */ 4321 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4322 *error = ENOMEM; 4323 return (NULL); 4324 } 4325 SCTP_INCR_ASOC_COUNT(); 4326 4327 bzero(stcb, sizeof(*stcb)); 4328 asoc = &stcb->asoc; 4329 4330 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4331 SCTP_TCB_LOCK_INIT(stcb); 4332 SCTP_TCB_SEND_LOCK_INIT(stcb); 4333 stcb->rport = rport; 4334 /* setup back pointer's */ 4335 stcb->sctp_ep = inp; 4336 stcb->sctp_socket = inp->sctp_socket; 4337 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4338 /* failed */ 4339 SCTP_TCB_LOCK_DESTROY(stcb); 4340 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4341 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4342 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4343 SCTP_DECR_ASOC_COUNT(); 4344 *error = err; 4345 return (NULL); 4346 } 4347 /* and the port */ 4348 SCTP_INP_INFO_WLOCK(); 4349 SCTP_INP_WLOCK(inp); 4350 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4351 /* inpcb freed while alloc going on */ 4352 SCTP_TCB_LOCK_DESTROY(stcb); 4353 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4354 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4355 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4356 SCTP_INP_WUNLOCK(inp); 4357 SCTP_INP_INFO_WUNLOCK(); 4358 SCTP_DECR_ASOC_COUNT(); 4359 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4360 *error = EINVAL; 4361 return (NULL); 4362 } 4363 SCTP_TCB_LOCK(stcb); 4364 4365 /* now that my_vtag is set, add it to the hash */ 4366 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4367 /* put it in the bucket in the vtag hash of assoc's for the system */ 4368 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4369 SCTP_INP_INFO_WUNLOCK(); 4370 4371 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4372 /* failure.. memory error? */ 4373 if (asoc->strmout) { 4374 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4375 asoc->strmout = NULL; 4376 } 4377 if (asoc->mapping_array) { 4378 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4379 asoc->mapping_array = NULL; 4380 } 4381 if (asoc->nr_mapping_array) { 4382 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4383 asoc->nr_mapping_array = NULL; 4384 } 4385 SCTP_DECR_ASOC_COUNT(); 4386 SCTP_TCB_UNLOCK(stcb); 4387 SCTP_TCB_LOCK_DESTROY(stcb); 4388 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4389 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4390 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4391 SCTP_INP_WUNLOCK(inp); 4392 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4393 *error = ENOBUFS; 4394 return (NULL); 4395 } 4396 /* Init all the timers */ 4397 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4398 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4399 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4400 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4401 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4402 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4403 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4404 4405 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4406 /* now file the port under the hash as well */ 4407 if (inp->sctp_tcbhash != NULL) { 4408 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4409 inp->sctp_hashmark)]; 4410 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4411 } 4412 SCTP_INP_WUNLOCK(inp); 4413 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4414 return (stcb); 4415 } 4416 4417 4418 void 4419 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4420 { 4421 struct sctp_association *asoc; 4422 4423 asoc = &stcb->asoc; 4424 asoc->numnets--; 4425 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4426 if (net == asoc->primary_destination) { 4427 /* Reset primary */ 4428 struct sctp_nets *lnet; 4429 4430 lnet = TAILQ_FIRST(&asoc->nets); 4431 /* 4432 * Mobility adaptation Ideally, if deleted destination is 4433 * the primary, it becomes a fast retransmission trigger by 4434 * the subsequent SET PRIMARY. (by micchie) 4435 */ 4436 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4437 SCTP_MOBILITY_BASE) || 4438 sctp_is_mobility_feature_on(stcb->sctp_ep, 4439 SCTP_MOBILITY_FASTHANDOFF)) { 4440 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4441 if (asoc->deleted_primary != NULL) { 4442 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4443 goto out; 4444 } 4445 asoc->deleted_primary = net; 4446 atomic_add_int(&net->ref_count, 1); 4447 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4448 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4449 sctp_mobility_feature_on(stcb->sctp_ep, 4450 SCTP_MOBILITY_PRIM_DELETED); 4451 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4452 stcb->sctp_ep, stcb, NULL); 4453 } 4454 out: 4455 /* Try to find a confirmed primary */ 4456 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4457 } 4458 if (net == asoc->last_data_chunk_from) { 4459 /* Reset primary */ 4460 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4461 } 4462 if (net == asoc->last_control_chunk_from) { 4463 /* Clear net */ 4464 asoc->last_control_chunk_from = NULL; 4465 } 4466 if (net == stcb->asoc.alternate) { 4467 sctp_free_remote_addr(stcb->asoc.alternate); 4468 stcb->asoc.alternate = NULL; 4469 } 4470 sctp_free_remote_addr(net); 4471 } 4472 4473 /* 4474 * remove a remote endpoint address from an association, it will fail if the 4475 * address does not exist. 4476 */ 4477 int 4478 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4479 { 4480 /* 4481 * Here we need to remove a remote address. This is quite simple, we 4482 * first find it in the list of address for the association 4483 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4484 * on that item. Note we do not allow it to be removed if there are 4485 * no other addresses. 4486 */ 4487 struct sctp_association *asoc; 4488 struct sctp_nets *net, *nnet; 4489 4490 asoc = &stcb->asoc; 4491 4492 /* locate the address */ 4493 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4494 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4495 continue; 4496 } 4497 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4498 remaddr)) { 4499 /* we found the guy */ 4500 if (asoc->numnets < 2) { 4501 /* Must have at LEAST two remote addresses */ 4502 return (-1); 4503 } else { 4504 sctp_remove_net(stcb, net); 4505 return (0); 4506 } 4507 } 4508 } 4509 /* not found. */ 4510 return (-2); 4511 } 4512 4513 void 4514 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4515 { 4516 struct sctpvtaghead *chain; 4517 struct sctp_tagblock *twait_block; 4518 int found = 0; 4519 int i; 4520 4521 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4522 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4523 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4524 if ((twait_block->vtag_block[i].v_tag == tag) && 4525 (twait_block->vtag_block[i].lport == lport) && 4526 (twait_block->vtag_block[i].rport == rport)) { 4527 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4528 twait_block->vtag_block[i].v_tag = 0; 4529 twait_block->vtag_block[i].lport = 0; 4530 twait_block->vtag_block[i].rport = 0; 4531 found = 1; 4532 break; 4533 } 4534 } 4535 if (found) 4536 break; 4537 } 4538 } 4539 4540 int 4541 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4542 { 4543 struct sctpvtaghead *chain; 4544 struct sctp_tagblock *twait_block; 4545 int found = 0; 4546 int i; 4547 4548 SCTP_INP_INFO_WLOCK(); 4549 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4550 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4551 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4552 if ((twait_block->vtag_block[i].v_tag == tag) && 4553 (twait_block->vtag_block[i].lport == lport) && 4554 (twait_block->vtag_block[i].rport == rport)) { 4555 found = 1; 4556 break; 4557 } 4558 } 4559 if (found) 4560 break; 4561 } 4562 SCTP_INP_INFO_WUNLOCK(); 4563 return (found); 4564 } 4565 4566 4567 void 4568 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4569 { 4570 struct sctpvtaghead *chain; 4571 struct sctp_tagblock *twait_block; 4572 struct timeval now; 4573 int set, i; 4574 4575 if (time == 0) { 4576 /* Its disabled */ 4577 return; 4578 } 4579 (void)SCTP_GETTIME_TIMEVAL(&now); 4580 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4581 set = 0; 4582 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4583 /* Block(s) present, lets find space, and expire on the fly */ 4584 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4585 if ((twait_block->vtag_block[i].v_tag == 0) && 4586 !set) { 4587 twait_block->vtag_block[i].tv_sec_at_expire = 4588 now.tv_sec + time; 4589 twait_block->vtag_block[i].v_tag = tag; 4590 twait_block->vtag_block[i].lport = lport; 4591 twait_block->vtag_block[i].rport = rport; 4592 set = 1; 4593 } else if ((twait_block->vtag_block[i].v_tag) && 4594 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4595 /* Audit expires this guy */ 4596 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4597 twait_block->vtag_block[i].v_tag = 0; 4598 twait_block->vtag_block[i].lport = 0; 4599 twait_block->vtag_block[i].rport = 0; 4600 if (set == 0) { 4601 /* Reuse it for my new tag */ 4602 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4603 twait_block->vtag_block[i].v_tag = tag; 4604 twait_block->vtag_block[i].lport = lport; 4605 twait_block->vtag_block[i].rport = rport; 4606 set = 1; 4607 } 4608 } 4609 } 4610 if (set) { 4611 /* 4612 * We only do up to the block where we can place our 4613 * tag for audits 4614 */ 4615 break; 4616 } 4617 } 4618 /* Need to add a new block to chain */ 4619 if (!set) { 4620 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4621 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4622 if (twait_block == NULL) { 4623 #ifdef INVARIANTS 4624 panic("Can not alloc tagblock"); 4625 #endif 4626 return; 4627 } 4628 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4629 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4630 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4631 twait_block->vtag_block[0].v_tag = tag; 4632 twait_block->vtag_block[0].lport = lport; 4633 twait_block->vtag_block[0].rport = rport; 4634 } 4635 } 4636 4637 4638 4639 /*- 4640 * Free the association after un-hashing the remote port. This 4641 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4642 * expect that the input to this function IS a locked TCB. 4643 * It will return 0, if it did NOT destroy the association (instead 4644 * it unlocks it. It will return NON-zero if it either destroyed the 4645 * association OR the association is already destroyed. 4646 */ 4647 int 4648 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4649 { 4650 int i; 4651 struct sctp_association *asoc; 4652 struct sctp_nets *net, *nnet; 4653 struct sctp_laddr *laddr, *naddr; 4654 struct sctp_tmit_chunk *chk, *nchk; 4655 struct sctp_asconf_addr *aparam, *naparam; 4656 struct sctp_asconf_ack *aack, *naack; 4657 struct sctp_stream_reset_list *strrst, *nstrrst; 4658 struct sctp_queued_to_read *sq, *nsq; 4659 struct sctp_stream_queue_pending *sp, *nsp; 4660 sctp_sharedkey_t *shared_key, *nshared_key; 4661 struct socket *so; 4662 4663 /* first, lets purge the entry from the hash table. */ 4664 4665 #ifdef SCTP_LOG_CLOSING 4666 sctp_log_closing(inp, stcb, 6); 4667 #endif 4668 if (stcb->asoc.state == 0) { 4669 #ifdef SCTP_LOG_CLOSING 4670 sctp_log_closing(inp, NULL, 7); 4671 #endif 4672 /* there is no asoc, really TSNH :-0 */ 4673 return (1); 4674 } 4675 if (stcb->asoc.alternate) { 4676 sctp_free_remote_addr(stcb->asoc.alternate); 4677 stcb->asoc.alternate = NULL; 4678 } 4679 /* TEMP CODE */ 4680 if (stcb->freed_from_where == 0) { 4681 /* Only record the first place free happened from */ 4682 stcb->freed_from_where = from_location; 4683 } 4684 /* TEMP CODE */ 4685 4686 asoc = &stcb->asoc; 4687 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4688 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4689 /* nothing around */ 4690 so = NULL; 4691 else 4692 so = inp->sctp_socket; 4693 4694 /* 4695 * We used timer based freeing if a reader or writer is in the way. 4696 * So we first check if we are actually being called from a timer, 4697 * if so we abort early if a reader or writer is still in the way. 4698 */ 4699 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4700 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4701 /* 4702 * is it the timer driving us? if so are the reader/writers 4703 * gone? 4704 */ 4705 if (stcb->asoc.refcnt) { 4706 /* nope, reader or writer in the way */ 4707 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4708 /* no asoc destroyed */ 4709 SCTP_TCB_UNLOCK(stcb); 4710 #ifdef SCTP_LOG_CLOSING 4711 sctp_log_closing(inp, stcb, 8); 4712 #endif 4713 return (0); 4714 } 4715 } 4716 /* now clean up any other timers */ 4717 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4718 asoc->dack_timer.self = NULL; 4719 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4720 /*- 4721 * For stream reset we don't blast this unless 4722 * it is a str-reset timer, it might be the 4723 * free-asoc timer which we DON'T want to 4724 * disturb. 4725 */ 4726 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4727 asoc->strreset_timer.self = NULL; 4728 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4729 asoc->asconf_timer.self = NULL; 4730 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4731 asoc->autoclose_timer.self = NULL; 4732 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4733 asoc->shut_guard_timer.self = NULL; 4734 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4735 asoc->delayed_event_timer.self = NULL; 4736 /* Mobility adaptation */ 4737 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4738 asoc->delete_prim_timer.self = NULL; 4739 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4740 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4741 net->rxt_timer.self = NULL; 4742 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4743 net->pmtu_timer.self = NULL; 4744 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4745 net->hb_timer.self = NULL; 4746 } 4747 /* Now the read queue needs to be cleaned up (only once) */ 4748 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4749 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4750 SCTP_INP_READ_LOCK(inp); 4751 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4752 if (sq->stcb == stcb) { 4753 sq->do_not_ref_stcb = 1; 4754 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4755 /* 4756 * If there is no end, there never will be 4757 * now. 4758 */ 4759 if (sq->end_added == 0) { 4760 /* Held for PD-API clear that. */ 4761 sq->pdapi_aborted = 1; 4762 sq->held_length = 0; 4763 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4764 /* 4765 * Need to add a PD-API 4766 * aborted indication. 4767 * Setting the control_pdapi 4768 * assures that it will be 4769 * added right after this 4770 * msg. 4771 */ 4772 uint32_t strseq; 4773 4774 stcb->asoc.control_pdapi = sq; 4775 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4776 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4777 stcb, 4778 SCTP_PARTIAL_DELIVERY_ABORTED, 4779 (void *)&strseq, 4780 SCTP_SO_LOCKED); 4781 stcb->asoc.control_pdapi = NULL; 4782 } 4783 } 4784 /* Add an end to wake them */ 4785 sq->end_added = 1; 4786 } 4787 } 4788 SCTP_INP_READ_UNLOCK(inp); 4789 if (stcb->block_entry) { 4790 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4791 stcb->block_entry->error = ECONNRESET; 4792 stcb->block_entry = NULL; 4793 } 4794 } 4795 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4796 /* 4797 * Someone holds a reference OR the socket is unaccepted 4798 * yet. 4799 */ 4800 if ((stcb->asoc.refcnt) || 4801 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4802 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4803 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4804 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4805 } 4806 SCTP_TCB_UNLOCK(stcb); 4807 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4808 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4809 /* nothing around */ 4810 so = NULL; 4811 if (so) { 4812 /* Wake any reader/writers */ 4813 sctp_sorwakeup(inp, so); 4814 sctp_sowwakeup(inp, so); 4815 } 4816 #ifdef SCTP_LOG_CLOSING 4817 sctp_log_closing(inp, stcb, 9); 4818 #endif 4819 /* no asoc destroyed */ 4820 return (0); 4821 } 4822 #ifdef SCTP_LOG_CLOSING 4823 sctp_log_closing(inp, stcb, 10); 4824 #endif 4825 /* 4826 * When I reach here, no others want to kill the assoc yet.. and I 4827 * own the lock. Now its possible an abort comes in when I do the 4828 * lock exchange below to grab all the locks to do the final take 4829 * out. to prevent this we increment the count, which will start a 4830 * timer and blow out above thus assuring us that we hold exclusive 4831 * killing of the asoc. Note that after getting back the TCB lock we 4832 * will go ahead and increment the counter back up and stop any 4833 * timer a passing stranger may have started :-S 4834 */ 4835 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4836 atomic_add_int(&stcb->asoc.refcnt, 1); 4837 4838 SCTP_TCB_UNLOCK(stcb); 4839 SCTP_INP_INFO_WLOCK(); 4840 SCTP_INP_WLOCK(inp); 4841 SCTP_TCB_LOCK(stcb); 4842 } 4843 /* Double check the GONE flag */ 4844 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4845 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4846 /* nothing around */ 4847 so = NULL; 4848 4849 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4850 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4851 /* 4852 * For TCP type we need special handling when we are 4853 * connected. We also include the peel'ed off ones to. 4854 */ 4855 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4856 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4857 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4858 if (so) { 4859 SOCK_LOCK(so); 4860 if (so->so_rcv.sb_cc == 0) { 4861 so->so_state &= ~(SS_ISCONNECTING | 4862 SS_ISDISCONNECTING | 4863 SS_ISCONFIRMING | 4864 SS_ISCONNECTED); 4865 } 4866 socantrcvmore_locked(so); 4867 sctp_sowwakeup(inp, so); 4868 sctp_sorwakeup(inp, so); 4869 SCTP_SOWAKEUP(so); 4870 } 4871 } 4872 } 4873 /* 4874 * Make it invalid too, that way if its about to run it will abort 4875 * and return. 4876 */ 4877 /* re-increment the lock */ 4878 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4879 atomic_add_int(&stcb->asoc.refcnt, -1); 4880 } 4881 if (stcb->asoc.refcnt) { 4882 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4883 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4884 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4885 SCTP_INP_INFO_WUNLOCK(); 4886 SCTP_INP_WUNLOCK(inp); 4887 } 4888 SCTP_TCB_UNLOCK(stcb); 4889 return (0); 4890 } 4891 asoc->state = 0; 4892 if (inp->sctp_tcbhash) { 4893 LIST_REMOVE(stcb, sctp_tcbhash); 4894 } 4895 if (stcb->asoc.in_asocid_hash) { 4896 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4897 } 4898 /* Now lets remove it from the list of ALL associations in the EP */ 4899 LIST_REMOVE(stcb, sctp_tcblist); 4900 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4901 SCTP_INP_INCR_REF(inp); 4902 SCTP_INP_WUNLOCK(inp); 4903 } 4904 /* pull from vtag hash */ 4905 LIST_REMOVE(stcb, sctp_asocs); 4906 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4907 inp->sctp_lport, stcb->rport); 4908 4909 /* 4910 * Now restop the timers to be sure this is paranoia at is finest! 4911 */ 4912 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4913 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4914 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4915 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4916 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4917 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4918 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4919 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4920 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4921 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4922 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4923 } 4924 4925 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4926 /* 4927 * The chunk lists and such SHOULD be empty but we check them just 4928 * in case. 4929 */ 4930 /* anything on the wheel needs to be removed */ 4931 for (i = 0; i < asoc->streamoutcnt; i++) { 4932 struct sctp_stream_out *outs; 4933 4934 outs = &asoc->strmout[i]; 4935 /* now clean up any chunks here */ 4936 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4937 TAILQ_REMOVE(&outs->outqueue, sp, next); 4938 sctp_free_spbufspace(stcb, asoc, sp); 4939 if (sp->data) { 4940 if (so) { 4941 /* Still an open socket - report */ 4942 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4943 0, (void *)sp, SCTP_SO_LOCKED); 4944 } 4945 if (sp->data) { 4946 sctp_m_freem(sp->data); 4947 sp->data = NULL; 4948 sp->tail_mbuf = NULL; 4949 sp->length = 0; 4950 } 4951 } 4952 if (sp->net) { 4953 sctp_free_remote_addr(sp->net); 4954 sp->net = NULL; 4955 } 4956 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4957 } 4958 } 4959 /* sa_ignore FREED_MEMORY */ 4960 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4961 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4962 SCTP_FREE(strrst, SCTP_M_STRESET); 4963 } 4964 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4965 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4966 if (sq->data) { 4967 sctp_m_freem(sq->data); 4968 sq->data = NULL; 4969 } 4970 sctp_free_remote_addr(sq->whoFrom); 4971 sq->whoFrom = NULL; 4972 sq->stcb = NULL; 4973 /* Free the ctl entry */ 4974 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4975 SCTP_DECR_READQ_COUNT(); 4976 /* sa_ignore FREED_MEMORY */ 4977 } 4978 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4979 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4980 if (chk->data) { 4981 sctp_m_freem(chk->data); 4982 chk->data = NULL; 4983 } 4984 if (chk->holds_key_ref) 4985 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4986 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4987 SCTP_DECR_CHK_COUNT(); 4988 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4989 asoc->free_chunk_cnt--; 4990 /* sa_ignore FREED_MEMORY */ 4991 } 4992 /* pending send queue SHOULD be empty */ 4993 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4994 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4995 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4996 #ifdef INVARIANTS 4997 } else { 4998 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4999 #endif 5000 } 5001 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5002 if (chk->data) { 5003 if (so) { 5004 /* Still a socket? */ 5005 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5006 0, chk, SCTP_SO_LOCKED); 5007 } 5008 if (chk->data) { 5009 sctp_m_freem(chk->data); 5010 chk->data = NULL; 5011 } 5012 } 5013 if (chk->holds_key_ref) 5014 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5015 if (chk->whoTo) { 5016 sctp_free_remote_addr(chk->whoTo); 5017 chk->whoTo = NULL; 5018 } 5019 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5020 SCTP_DECR_CHK_COUNT(); 5021 /* sa_ignore FREED_MEMORY */ 5022 } 5023 /* sent queue SHOULD be empty */ 5024 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5025 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5026 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5027 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5028 #ifdef INVARIANTS 5029 } else { 5030 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5031 #endif 5032 } 5033 } 5034 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5035 if (chk->data) { 5036 if (so) { 5037 /* Still a socket? */ 5038 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5039 0, chk, SCTP_SO_LOCKED); 5040 } 5041 if (chk->data) { 5042 sctp_m_freem(chk->data); 5043 chk->data = NULL; 5044 } 5045 } 5046 if (chk->holds_key_ref) 5047 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5048 sctp_free_remote_addr(chk->whoTo); 5049 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5050 SCTP_DECR_CHK_COUNT(); 5051 /* sa_ignore FREED_MEMORY */ 5052 } 5053 #ifdef INVARIANTS 5054 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5055 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5056 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5057 } 5058 } 5059 #endif 5060 /* control queue MAY not be empty */ 5061 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5062 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5063 if (chk->data) { 5064 sctp_m_freem(chk->data); 5065 chk->data = NULL; 5066 } 5067 if (chk->holds_key_ref) 5068 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5069 sctp_free_remote_addr(chk->whoTo); 5070 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5071 SCTP_DECR_CHK_COUNT(); 5072 /* sa_ignore FREED_MEMORY */ 5073 } 5074 /* ASCONF queue MAY not be empty */ 5075 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5076 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5077 if (chk->data) { 5078 sctp_m_freem(chk->data); 5079 chk->data = NULL; 5080 } 5081 if (chk->holds_key_ref) 5082 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5083 sctp_free_remote_addr(chk->whoTo); 5084 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5085 SCTP_DECR_CHK_COUNT(); 5086 /* sa_ignore FREED_MEMORY */ 5087 } 5088 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5089 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5090 if (chk->data) { 5091 sctp_m_freem(chk->data); 5092 chk->data = NULL; 5093 } 5094 if (chk->holds_key_ref) 5095 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5096 sctp_free_remote_addr(chk->whoTo); 5097 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5098 SCTP_DECR_CHK_COUNT(); 5099 /* sa_ignore FREED_MEMORY */ 5100 } 5101 5102 if (asoc->mapping_array) { 5103 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5104 asoc->mapping_array = NULL; 5105 } 5106 if (asoc->nr_mapping_array) { 5107 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5108 asoc->nr_mapping_array = NULL; 5109 } 5110 /* the stream outs */ 5111 if (asoc->strmout) { 5112 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5113 asoc->strmout = NULL; 5114 } 5115 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5116 if (asoc->strmin) { 5117 struct sctp_queued_to_read *ctl, *nctl; 5118 5119 for (i = 0; i < asoc->streamincnt; i++) { 5120 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5121 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5122 sctp_free_remote_addr(ctl->whoFrom); 5123 if (ctl->data) { 5124 sctp_m_freem(ctl->data); 5125 ctl->data = NULL; 5126 } 5127 /* 5128 * We don't free the address here since all 5129 * the net's were freed above. 5130 */ 5131 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5132 SCTP_DECR_READQ_COUNT(); 5133 } 5134 } 5135 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5136 asoc->strmin = NULL; 5137 } 5138 asoc->streamincnt = 0; 5139 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5140 #ifdef INVARIANTS 5141 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5142 panic("no net's left alloc'ed, or list points to itself"); 5143 } 5144 #endif 5145 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5146 sctp_free_remote_addr(net); 5147 } 5148 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5149 /* sa_ignore FREED_MEMORY */ 5150 sctp_remove_laddr(laddr); 5151 } 5152 5153 /* pending asconf (address) parameters */ 5154 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5155 /* sa_ignore FREED_MEMORY */ 5156 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5157 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5158 } 5159 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5160 /* sa_ignore FREED_MEMORY */ 5161 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5162 if (aack->data != NULL) { 5163 sctp_m_freem(aack->data); 5164 } 5165 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5166 } 5167 /* clean up auth stuff */ 5168 if (asoc->local_hmacs) 5169 sctp_free_hmaclist(asoc->local_hmacs); 5170 if (asoc->peer_hmacs) 5171 sctp_free_hmaclist(asoc->peer_hmacs); 5172 5173 if (asoc->local_auth_chunks) 5174 sctp_free_chunklist(asoc->local_auth_chunks); 5175 if (asoc->peer_auth_chunks) 5176 sctp_free_chunklist(asoc->peer_auth_chunks); 5177 5178 sctp_free_authinfo(&asoc->authinfo); 5179 5180 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5181 LIST_REMOVE(shared_key, next); 5182 sctp_free_sharedkey(shared_key); 5183 /* sa_ignore FREED_MEMORY */ 5184 } 5185 5186 /* Insert new items here :> */ 5187 5188 /* Get rid of LOCK */ 5189 SCTP_TCB_UNLOCK(stcb); 5190 SCTP_TCB_LOCK_DESTROY(stcb); 5191 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5192 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5193 SCTP_INP_INFO_WUNLOCK(); 5194 SCTP_INP_RLOCK(inp); 5195 } 5196 #ifdef SCTP_TRACK_FREED_ASOCS 5197 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5198 /* now clean up the tasoc itself */ 5199 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5200 SCTP_DECR_ASOC_COUNT(); 5201 } else { 5202 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5203 } 5204 #else 5205 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5206 SCTP_DECR_ASOC_COUNT(); 5207 #endif 5208 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5209 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5210 /* 5211 * If its NOT the inp_free calling us AND sctp_close 5212 * as been called, we call back... 5213 */ 5214 SCTP_INP_RUNLOCK(inp); 5215 /* 5216 * This will start the kill timer (if we are the 5217 * last one) since we hold an increment yet. But 5218 * this is the only safe way to do this since 5219 * otherwise if the socket closes at the same time 5220 * we are here we might collide in the cleanup. 5221 */ 5222 sctp_inpcb_free(inp, 5223 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5224 SCTP_CALLED_DIRECTLY_NOCMPSET); 5225 SCTP_INP_DECR_REF(inp); 5226 goto out_of; 5227 } else { 5228 /* The socket is still open. */ 5229 SCTP_INP_DECR_REF(inp); 5230 } 5231 } 5232 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5233 SCTP_INP_RUNLOCK(inp); 5234 } 5235 out_of: 5236 /* destroyed the asoc */ 5237 #ifdef SCTP_LOG_CLOSING 5238 sctp_log_closing(inp, NULL, 11); 5239 #endif 5240 return (1); 5241 } 5242 5243 5244 5245 /* 5246 * determine if a destination is "reachable" based upon the addresses bound 5247 * to the current endpoint (e.g. only v4 or v6 currently bound) 5248 */ 5249 /* 5250 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5251 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5252 * types bound as its endpoint 5253 */ 5254 int 5255 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5256 { 5257 struct sctp_inpcb *inp; 5258 int answer; 5259 5260 /* 5261 * No locks here, the TCB, in all cases is already locked and an 5262 * assoc is up. There is either a INP lock by the caller applied (in 5263 * asconf case when deleting an address) or NOT in the HB case, 5264 * however if HB then the INP increment is up and the INP will not 5265 * be removed (on top of the fact that we have a TCB lock). So we 5266 * only want to read the sctp_flags, which is either bound-all or 5267 * not.. no protection needed since once an assoc is up you can't be 5268 * changing your binding. 5269 */ 5270 inp = stcb->sctp_ep; 5271 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5272 /* if bound all, destination is not restricted */ 5273 /* 5274 * RRS: Question during lock work: Is this correct? If you 5275 * are bound-all you still might need to obey the V4--V6 5276 * flags??? IMO this bound-all stuff needs to be removed! 5277 */ 5278 return (1); 5279 } 5280 /* NOTE: all "scope" checks are done when local addresses are added */ 5281 switch (destaddr->sa_family) { 5282 #ifdef INET6 5283 case AF_INET6: 5284 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5285 break; 5286 #endif 5287 #ifdef INET 5288 case AF_INET: 5289 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5290 break; 5291 #endif 5292 default: 5293 /* invalid family, so it's unreachable */ 5294 answer = 0; 5295 break; 5296 } 5297 return (answer); 5298 } 5299 5300 /* 5301 * update the inp_vflags on an endpoint 5302 */ 5303 static void 5304 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5305 { 5306 struct sctp_laddr *laddr; 5307 5308 /* first clear the flag */ 5309 inp->ip_inp.inp.inp_vflag = 0; 5310 /* set the flag based on addresses on the ep list */ 5311 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5312 if (laddr->ifa == NULL) { 5313 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5314 __FUNCTION__); 5315 continue; 5316 } 5317 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5318 continue; 5319 } 5320 switch (laddr->ifa->address.sa.sa_family) { 5321 #ifdef INET6 5322 case AF_INET6: 5323 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5324 break; 5325 #endif 5326 #ifdef INET 5327 case AF_INET: 5328 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5329 break; 5330 #endif 5331 default: 5332 break; 5333 } 5334 } 5335 } 5336 5337 /* 5338 * Add the address to the endpoint local address list There is nothing to be 5339 * done if we are bound to all addresses 5340 */ 5341 void 5342 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5343 { 5344 struct sctp_laddr *laddr; 5345 int fnd, error = 0; 5346 5347 fnd = 0; 5348 5349 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5350 /* You are already bound to all. You have it already */ 5351 return; 5352 } 5353 #ifdef INET6 5354 if (ifa->address.sa.sa_family == AF_INET6) { 5355 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5356 /* Can't bind a non-useable addr. */ 5357 return; 5358 } 5359 } 5360 #endif 5361 /* first, is it already present? */ 5362 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5363 if (laddr->ifa == ifa) { 5364 fnd = 1; 5365 break; 5366 } 5367 } 5368 5369 if (fnd == 0) { 5370 /* Not in the ep list */ 5371 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5372 if (error != 0) 5373 return; 5374 inp->laddr_count++; 5375 /* update inp_vflag flags */ 5376 switch (ifa->address.sa.sa_family) { 5377 #ifdef INET6 5378 case AF_INET6: 5379 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5380 break; 5381 #endif 5382 #ifdef INET 5383 case AF_INET: 5384 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5385 break; 5386 #endif 5387 default: 5388 break; 5389 } 5390 } 5391 return; 5392 } 5393 5394 5395 /* 5396 * select a new (hopefully reachable) destination net (should only be used 5397 * when we deleted an ep addr that is the only usable source address to reach 5398 * the destination net) 5399 */ 5400 static void 5401 sctp_select_primary_destination(struct sctp_tcb *stcb) 5402 { 5403 struct sctp_nets *net; 5404 5405 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5406 /* for now, we'll just pick the first reachable one we find */ 5407 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5408 continue; 5409 if (sctp_destination_is_reachable(stcb, 5410 (struct sockaddr *)&net->ro._l_addr)) { 5411 /* found a reachable destination */ 5412 stcb->asoc.primary_destination = net; 5413 } 5414 } 5415 /* I can't there from here! ...we're gonna die shortly... */ 5416 } 5417 5418 5419 /* 5420 * Delete the address from the endpoint local address list There is nothing 5421 * to be done if we are bound to all addresses 5422 */ 5423 void 5424 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5425 { 5426 struct sctp_laddr *laddr; 5427 int fnd; 5428 5429 fnd = 0; 5430 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5431 /* You are already bound to all. You have it already */ 5432 return; 5433 } 5434 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5435 if (laddr->ifa == ifa) { 5436 fnd = 1; 5437 break; 5438 } 5439 } 5440 if (fnd && (inp->laddr_count < 2)) { 5441 /* can't delete unless there are at LEAST 2 addresses */ 5442 return; 5443 } 5444 if (fnd) { 5445 /* 5446 * clean up any use of this address go through our 5447 * associations and clear any last_used_address that match 5448 * this one for each assoc, see if a new primary_destination 5449 * is needed 5450 */ 5451 struct sctp_tcb *stcb; 5452 5453 /* clean up "next_addr_touse" */ 5454 if (inp->next_addr_touse == laddr) 5455 /* delete this address */ 5456 inp->next_addr_touse = NULL; 5457 5458 /* clean up "last_used_address" */ 5459 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5460 struct sctp_nets *net; 5461 5462 SCTP_TCB_LOCK(stcb); 5463 if (stcb->asoc.last_used_address == laddr) 5464 /* delete this address */ 5465 stcb->asoc.last_used_address = NULL; 5466 /* 5467 * Now spin through all the nets and purge any ref 5468 * to laddr 5469 */ 5470 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5471 if (net->ro._s_addr && 5472 (net->ro._s_addr->ifa == laddr->ifa)) { 5473 /* Yep, purge src address selected */ 5474 sctp_rtentry_t *rt; 5475 5476 /* delete this address if cached */ 5477 rt = net->ro.ro_rt; 5478 if (rt != NULL) { 5479 RTFREE(rt); 5480 net->ro.ro_rt = NULL; 5481 } 5482 sctp_free_ifa(net->ro._s_addr); 5483 net->ro._s_addr = NULL; 5484 net->src_addr_selected = 0; 5485 } 5486 } 5487 SCTP_TCB_UNLOCK(stcb); 5488 } /* for each tcb */ 5489 /* remove it from the ep list */ 5490 sctp_remove_laddr(laddr); 5491 inp->laddr_count--; 5492 /* update inp_vflag flags */ 5493 sctp_update_ep_vflag(inp); 5494 } 5495 return; 5496 } 5497 5498 /* 5499 * Add the address to the TCB local address restricted list. 5500 * This is a "pending" address list (eg. addresses waiting for an 5501 * ASCONF-ACK response) and cannot be used as a valid source address. 5502 */ 5503 void 5504 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5505 { 5506 struct sctp_laddr *laddr; 5507 struct sctpladdr *list; 5508 5509 /* 5510 * Assumes TCB is locked.. and possibly the INP. May need to 5511 * confirm/fix that if we need it and is not the case. 5512 */ 5513 list = &stcb->asoc.sctp_restricted_addrs; 5514 5515 #ifdef INET6 5516 if (ifa->address.sa.sa_family == AF_INET6) { 5517 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5518 /* Can't bind a non-existent addr. */ 5519 return; 5520 } 5521 } 5522 #endif 5523 /* does the address already exist? */ 5524 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5525 if (laddr->ifa == ifa) { 5526 return; 5527 } 5528 } 5529 5530 /* add to the list */ 5531 (void)sctp_insert_laddr(list, ifa, 0); 5532 return; 5533 } 5534 5535 /* 5536 * insert an laddr entry with the given ifa for the desired list 5537 */ 5538 int 5539 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5540 { 5541 struct sctp_laddr *laddr; 5542 5543 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5544 if (laddr == NULL) { 5545 /* out of memory? */ 5546 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5547 return (EINVAL); 5548 } 5549 SCTP_INCR_LADDR_COUNT(); 5550 bzero(laddr, sizeof(*laddr)); 5551 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5552 laddr->ifa = ifa; 5553 laddr->action = act; 5554 atomic_add_int(&ifa->refcount, 1); 5555 /* insert it */ 5556 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5557 5558 return (0); 5559 } 5560 5561 /* 5562 * Remove an laddr entry from the local address list (on an assoc) 5563 */ 5564 void 5565 sctp_remove_laddr(struct sctp_laddr *laddr) 5566 { 5567 5568 /* remove from the list */ 5569 LIST_REMOVE(laddr, sctp_nxt_addr); 5570 sctp_free_ifa(laddr->ifa); 5571 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5572 SCTP_DECR_LADDR_COUNT(); 5573 } 5574 5575 /* 5576 * Remove a local address from the TCB local address restricted list 5577 */ 5578 void 5579 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5580 { 5581 struct sctp_inpcb *inp; 5582 struct sctp_laddr *laddr; 5583 5584 /* 5585 * This is called by asconf work. It is assumed that a) The TCB is 5586 * locked and b) The INP is locked. This is true in as much as I can 5587 * trace through the entry asconf code where I did these locks. 5588 * Again, the ASCONF code is a bit different in that it does lock 5589 * the INP during its work often times. This must be since we don't 5590 * want other proc's looking up things while what they are looking 5591 * up is changing :-D 5592 */ 5593 5594 inp = stcb->sctp_ep; 5595 /* if subset bound and don't allow ASCONF's, can't delete last */ 5596 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5597 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5598 if (stcb->sctp_ep->laddr_count < 2) { 5599 /* can't delete last address */ 5600 return; 5601 } 5602 } 5603 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5604 /* remove the address if it exists */ 5605 if (laddr->ifa == NULL) 5606 continue; 5607 if (laddr->ifa == ifa) { 5608 sctp_remove_laddr(laddr); 5609 return; 5610 } 5611 } 5612 5613 /* address not found! */ 5614 return; 5615 } 5616 5617 /* 5618 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5619 */ 5620 /* sysctl */ 5621 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5622 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5623 5624 5625 5626 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5627 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5628 int *sctp_cpuarry = NULL; 5629 void 5630 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5631 { 5632 /* Queue a packet to a processor for the specified core */ 5633 struct sctp_mcore_queue *qent; 5634 struct sctp_mcore_ctrl *wkq; 5635 int need_wake = 0; 5636 5637 if (sctp_mcore_workers == NULL) { 5638 /* Something went way bad during setup */ 5639 sctp_input_with_port(m, off, 0); 5640 return; 5641 } 5642 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5643 (sizeof(struct sctp_mcore_queue)), 5644 SCTP_M_MCORE); 5645 if (qent == NULL) { 5646 /* This is trouble */ 5647 sctp_input_with_port(m, off, 0); 5648 return; 5649 } 5650 qent->vn = curvnet; 5651 qent->m = m; 5652 qent->off = off; 5653 qent->v6 = 0; 5654 wkq = &sctp_mcore_workers[cpu_to_use]; 5655 SCTP_MCORE_QLOCK(wkq); 5656 5657 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5658 if (wkq->running == 0) { 5659 need_wake = 1; 5660 } 5661 SCTP_MCORE_QUNLOCK(wkq); 5662 if (need_wake) { 5663 wakeup(&wkq->running); 5664 } 5665 } 5666 5667 static void 5668 sctp_mcore_thread(void *arg) 5669 { 5670 5671 struct sctp_mcore_ctrl *wkq; 5672 struct sctp_mcore_queue *qent; 5673 5674 wkq = (struct sctp_mcore_ctrl *)arg; 5675 struct mbuf *m; 5676 int off, v6; 5677 5678 /* Wait for first tickle */ 5679 SCTP_MCORE_LOCK(wkq); 5680 wkq->running = 0; 5681 msleep(&wkq->running, 5682 &wkq->core_mtx, 5683 0, "wait for pkt", 0); 5684 SCTP_MCORE_UNLOCK(wkq); 5685 5686 /* Bind to our cpu */ 5687 thread_lock(curthread); 5688 sched_bind(curthread, wkq->cpuid); 5689 thread_unlock(curthread); 5690 5691 /* Now lets start working */ 5692 SCTP_MCORE_LOCK(wkq); 5693 /* Now grab lock and go */ 5694 for (;;) { 5695 SCTP_MCORE_QLOCK(wkq); 5696 skip_sleep: 5697 wkq->running = 1; 5698 qent = TAILQ_FIRST(&wkq->que); 5699 if (qent) { 5700 TAILQ_REMOVE(&wkq->que, qent, next); 5701 SCTP_MCORE_QUNLOCK(wkq); 5702 CURVNET_SET(qent->vn); 5703 m = qent->m; 5704 off = qent->off; 5705 v6 = qent->v6; 5706 SCTP_FREE(qent, SCTP_M_MCORE); 5707 if (v6 == 0) { 5708 sctp_input_with_port(m, off, 0); 5709 } else { 5710 SCTP_PRINTF("V6 not yet supported\n"); 5711 sctp_m_freem(m); 5712 } 5713 CURVNET_RESTORE(); 5714 SCTP_MCORE_QLOCK(wkq); 5715 } 5716 wkq->running = 0; 5717 if (!TAILQ_EMPTY(&wkq->que)) { 5718 goto skip_sleep; 5719 } 5720 SCTP_MCORE_QUNLOCK(wkq); 5721 msleep(&wkq->running, 5722 &wkq->core_mtx, 5723 0, "wait for pkt", 0); 5724 } 5725 } 5726 5727 static void 5728 sctp_startup_mcore_threads(void) 5729 { 5730 int i, cpu; 5731 5732 if (mp_ncpus == 1) 5733 return; 5734 5735 if (sctp_mcore_workers != NULL) { 5736 /* 5737 * Already been here in some previous vnet? 5738 */ 5739 return; 5740 } 5741 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5742 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5743 SCTP_M_MCORE); 5744 if (sctp_mcore_workers == NULL) { 5745 /* TSNH I hope */ 5746 return; 5747 } 5748 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5749 sizeof(struct sctp_mcore_ctrl))); 5750 /* Init the structures */ 5751 for (i = 0; i <= mp_maxid; i++) { 5752 TAILQ_INIT(&sctp_mcore_workers[i].que); 5753 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5754 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5755 sctp_mcore_workers[i].cpuid = i; 5756 } 5757 if (sctp_cpuarry == NULL) { 5758 SCTP_MALLOC(sctp_cpuarry, int *, 5759 (mp_ncpus * sizeof(int)), 5760 SCTP_M_MCORE); 5761 i = 0; 5762 CPU_FOREACH(cpu) { 5763 sctp_cpuarry[i] = cpu; 5764 i++; 5765 } 5766 } 5767 /* Now start them all */ 5768 CPU_FOREACH(cpu) { 5769 (void)kproc_create(sctp_mcore_thread, 5770 (void *)&sctp_mcore_workers[cpu], 5771 &sctp_mcore_workers[cpu].thread_proc, 5772 RFPROC, 5773 SCTP_KTHREAD_PAGES, 5774 SCTP_MCORE_NAME); 5775 5776 } 5777 } 5778 5779 #endif 5780 5781 void 5782 sctp_pcb_init() 5783 { 5784 /* 5785 * SCTP initialization for the PCB structures should be called by 5786 * the sctp_init() funciton. 5787 */ 5788 int i; 5789 struct timeval tv; 5790 5791 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5792 /* error I was called twice */ 5793 return; 5794 } 5795 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5796 5797 #if defined(SCTP_LOCAL_TRACE_BUF) 5798 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5799 #endif 5800 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5801 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5802 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5803 SCTP_M_MCORE); 5804 #endif 5805 (void)SCTP_GETTIME_TIMEVAL(&tv); 5806 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5807 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5808 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5809 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5810 #else 5811 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5812 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5813 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5814 #endif 5815 /* init the empty list of (All) Endpoints */ 5816 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5817 5818 5819 /* init the hash table of endpoints */ 5820 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5821 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5822 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5823 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5824 &SCTP_BASE_INFO(hashasocmark)); 5825 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5826 &SCTP_BASE_INFO(hashmark)); 5827 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5828 &SCTP_BASE_INFO(hashtcpmark)); 5829 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5830 5831 5832 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5833 &SCTP_BASE_INFO(hashvrfmark)); 5834 5835 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5836 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5837 /* init the zones */ 5838 /* 5839 * FIX ME: Should check for NULL returns, but if it does fail we are 5840 * doomed to panic anyways... add later maybe. 5841 */ 5842 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5843 sizeof(struct sctp_inpcb), maxsockets); 5844 5845 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5846 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5847 5848 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5849 sizeof(struct sctp_laddr), 5850 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5851 5852 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5853 sizeof(struct sctp_nets), 5854 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5855 5856 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5857 sizeof(struct sctp_tmit_chunk), 5858 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5859 5860 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5861 sizeof(struct sctp_queued_to_read), 5862 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5863 5864 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5865 sizeof(struct sctp_stream_queue_pending), 5866 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5867 5868 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5869 sizeof(struct sctp_asconf), 5870 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5871 5872 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5873 sizeof(struct sctp_asconf_ack), 5874 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5875 5876 5877 /* Master Lock INIT for info structure */ 5878 SCTP_INP_INFO_LOCK_INIT(); 5879 SCTP_STATLOG_INIT_LOCK(); 5880 5881 SCTP_IPI_COUNT_INIT(); 5882 SCTP_IPI_ADDR_INIT(); 5883 #ifdef SCTP_PACKET_LOGGING 5884 SCTP_IP_PKTLOG_INIT(); 5885 #endif 5886 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5887 5888 SCTP_WQ_ADDR_INIT(); 5889 /* not sure if we need all the counts */ 5890 SCTP_BASE_INFO(ipi_count_ep) = 0; 5891 /* assoc/tcb zone info */ 5892 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5893 /* local addrlist zone info */ 5894 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5895 /* remote addrlist zone info */ 5896 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5897 /* chunk info */ 5898 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5899 5900 /* socket queue zone info */ 5901 SCTP_BASE_INFO(ipi_count_readq) = 0; 5902 5903 /* stream out queue cont */ 5904 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5905 5906 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5907 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5908 5909 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5910 5911 /* Init the TIMEWAIT list */ 5912 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5913 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5914 } 5915 sctp_startup_iterator(); 5916 5917 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5918 sctp_startup_mcore_threads(); 5919 #endif 5920 5921 /* 5922 * INIT the default VRF which for BSD is the only one, other O/S's 5923 * may have more. But initially they must start with one and then 5924 * add the VRF's as addresses are added. 5925 */ 5926 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5927 } 5928 5929 /* 5930 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5931 */ 5932 void 5933 sctp_pcb_finish(void) 5934 { 5935 struct sctp_vrflist *vrf_bucket; 5936 struct sctp_vrf *vrf, *nvrf; 5937 struct sctp_ifn *ifn, *nifn; 5938 struct sctp_ifa *ifa, *nifa; 5939 struct sctpvtaghead *chain; 5940 struct sctp_tagblock *twait_block, *prev_twait_block; 5941 struct sctp_laddr *wi, *nwi; 5942 int i; 5943 struct sctp_iterator *it, *nit; 5944 5945 /* 5946 * In FreeBSD the iterator thread never exits but we do clean up. 5947 * The only way FreeBSD reaches here is if we have VRF's but we 5948 * still add the ifdef to make it compile on old versions. 5949 */ 5950 SCTP_IPI_ITERATOR_WQ_LOCK(); 5951 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5952 if (it->vn != curvnet) { 5953 continue; 5954 } 5955 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5956 if (it->function_atend != NULL) { 5957 (*it->function_atend) (it->pointer, it->val); 5958 } 5959 SCTP_FREE(it, SCTP_M_ITER); 5960 } 5961 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5962 SCTP_ITERATOR_LOCK(); 5963 if ((sctp_it_ctl.cur_it) && 5964 (sctp_it_ctl.cur_it->vn == curvnet)) { 5965 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5966 } 5967 SCTP_ITERATOR_UNLOCK(); 5968 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5969 SCTP_WQ_ADDR_LOCK(); 5970 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5971 LIST_REMOVE(wi, sctp_nxt_addr); 5972 SCTP_DECR_LADDR_COUNT(); 5973 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5974 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5975 } 5976 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5977 } 5978 SCTP_WQ_ADDR_UNLOCK(); 5979 5980 /* 5981 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5982 * destroyed first). 5983 */ 5984 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5985 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5986 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5987 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5988 /* free the ifa */ 5989 LIST_REMOVE(ifa, next_bucket); 5990 LIST_REMOVE(ifa, next_ifa); 5991 SCTP_FREE(ifa, SCTP_M_IFA); 5992 } 5993 /* free the ifn */ 5994 LIST_REMOVE(ifn, next_bucket); 5995 LIST_REMOVE(ifn, next_ifn); 5996 SCTP_FREE(ifn, SCTP_M_IFN); 5997 } 5998 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5999 /* free the vrf */ 6000 LIST_REMOVE(vrf, next_vrf); 6001 SCTP_FREE(vrf, SCTP_M_VRF); 6002 } 6003 /* free the vrf hashes */ 6004 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6005 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6006 6007 /* 6008 * free the TIMEWAIT list elements malloc'd in the function 6009 * sctp_add_vtag_to_timewait()... 6010 */ 6011 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6012 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6013 if (!LIST_EMPTY(chain)) { 6014 prev_twait_block = NULL; 6015 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6016 if (prev_twait_block) { 6017 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6018 } 6019 prev_twait_block = twait_block; 6020 } 6021 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6022 } 6023 } 6024 6025 /* free the locks and mutexes */ 6026 #ifdef SCTP_PACKET_LOGGING 6027 SCTP_IP_PKTLOG_DESTROY(); 6028 #endif 6029 SCTP_IPI_ADDR_DESTROY(); 6030 SCTP_STATLOG_DESTROY(); 6031 SCTP_INP_INFO_LOCK_DESTROY(); 6032 6033 SCTP_WQ_ADDR_DESTROY(); 6034 6035 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6036 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6037 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6038 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6039 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6040 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6041 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6042 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6043 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6044 /* Get rid of other stuff to */ 6045 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6046 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6047 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6048 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6049 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6050 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6051 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6052 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6053 #endif 6054 } 6055 6056 6057 int 6058 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6059 int offset, int limit, 6060 struct sockaddr *src, struct sockaddr *dst, 6061 struct sockaddr *altsa) 6062 { 6063 /* 6064 * grub through the INIT pulling addresses and loading them to the 6065 * nets structure in the asoc. The from address in the mbuf should 6066 * also be loaded (if it is not already). This routine can be called 6067 * with either INIT or INIT-ACK's as long as the m points to the IP 6068 * packet and the offset points to the beginning of the parameters. 6069 */ 6070 struct sctp_inpcb *inp; 6071 struct sctp_nets *net, *nnet, *net_tmp; 6072 struct sctp_paramhdr *phdr, parm_buf; 6073 struct sctp_tcb *stcb_tmp; 6074 uint16_t ptype, plen; 6075 struct sockaddr *sa; 6076 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6077 struct sctp_auth_random *p_random = NULL; 6078 uint16_t random_len = 0; 6079 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6080 struct sctp_auth_hmac_algo *hmacs = NULL; 6081 uint16_t hmacs_len = 0; 6082 uint8_t saw_asconf = 0; 6083 uint8_t saw_asconf_ack = 0; 6084 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6085 struct sctp_auth_chunk_list *chunks = NULL; 6086 uint16_t num_chunks = 0; 6087 sctp_key_t *new_key; 6088 uint32_t keylen; 6089 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6090 uint8_t peer_supports_ecn; 6091 uint8_t peer_supports_prsctp; 6092 uint8_t peer_supports_auth; 6093 uint8_t peer_supports_asconf; 6094 uint8_t peer_supports_asconf_ack; 6095 uint8_t peer_supports_reconfig; 6096 uint8_t peer_supports_nrsack; 6097 uint8_t peer_supports_pktdrop; 6098 6099 #ifdef INET 6100 struct sockaddr_in sin; 6101 6102 #endif 6103 #ifdef INET6 6104 struct sockaddr_in6 sin6; 6105 6106 #endif 6107 6108 /* First get the destination address setup too. */ 6109 #ifdef INET 6110 memset(&sin, 0, sizeof(sin)); 6111 sin.sin_family = AF_INET; 6112 sin.sin_len = sizeof(sin); 6113 sin.sin_port = stcb->rport; 6114 #endif 6115 #ifdef INET6 6116 memset(&sin6, 0, sizeof(sin6)); 6117 sin6.sin6_family = AF_INET6; 6118 sin6.sin6_len = sizeof(struct sockaddr_in6); 6119 sin6.sin6_port = stcb->rport; 6120 #endif 6121 if (altsa) { 6122 sa = altsa; 6123 } else { 6124 sa = src; 6125 } 6126 peer_supports_ecn = 0; 6127 peer_supports_prsctp = 0; 6128 peer_supports_auth = 0; 6129 peer_supports_asconf = 0; 6130 peer_supports_reconfig = 0; 6131 peer_supports_nrsack = 0; 6132 peer_supports_pktdrop = 0; 6133 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6134 /* mark all addresses that we have currently on the list */ 6135 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6136 } 6137 /* does the source address already exist? if so skip it */ 6138 inp = stcb->sctp_ep; 6139 atomic_add_int(&stcb->asoc.refcnt, 1); 6140 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6141 atomic_add_int(&stcb->asoc.refcnt, -1); 6142 6143 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6144 /* we must add the source address */ 6145 /* no scope set here since we have a tcb already. */ 6146 switch (sa->sa_family) { 6147 #ifdef INET 6148 case AF_INET: 6149 if (stcb->asoc.scope.ipv4_addr_legal) { 6150 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6151 return (-1); 6152 } 6153 } 6154 break; 6155 #endif 6156 #ifdef INET6 6157 case AF_INET6: 6158 if (stcb->asoc.scope.ipv6_addr_legal) { 6159 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6160 return (-2); 6161 } 6162 } 6163 break; 6164 #endif 6165 default: 6166 break; 6167 } 6168 } else { 6169 if (net_tmp != NULL && stcb_tmp == stcb) { 6170 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6171 } else if (stcb_tmp != stcb) { 6172 /* It belongs to another association? */ 6173 if (stcb_tmp) 6174 SCTP_TCB_UNLOCK(stcb_tmp); 6175 return (-3); 6176 } 6177 } 6178 if (stcb->asoc.state == 0) { 6179 /* the assoc was freed? */ 6180 return (-4); 6181 } 6182 /* now we must go through each of the params. */ 6183 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6184 while (phdr) { 6185 ptype = ntohs(phdr->param_type); 6186 plen = ntohs(phdr->param_length); 6187 /* 6188 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6189 * (uint32_t)ptype, (int)plen); 6190 */ 6191 if (offset + plen > limit) { 6192 break; 6193 } 6194 if (plen == 0) { 6195 break; 6196 } 6197 #ifdef INET 6198 if (ptype == SCTP_IPV4_ADDRESS) { 6199 if (stcb->asoc.scope.ipv4_addr_legal) { 6200 struct sctp_ipv4addr_param *p4, p4_buf; 6201 6202 /* ok get the v4 address and check/add */ 6203 phdr = sctp_get_next_param(m, offset, 6204 (struct sctp_paramhdr *)&p4_buf, 6205 sizeof(p4_buf)); 6206 if (plen != sizeof(struct sctp_ipv4addr_param) || 6207 phdr == NULL) { 6208 return (-5); 6209 } 6210 p4 = (struct sctp_ipv4addr_param *)phdr; 6211 sin.sin_addr.s_addr = p4->addr; 6212 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6213 /* Skip multi-cast addresses */ 6214 goto next_param; 6215 } 6216 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6217 (sin.sin_addr.s_addr == INADDR_ANY)) { 6218 goto next_param; 6219 } 6220 sa = (struct sockaddr *)&sin; 6221 inp = stcb->sctp_ep; 6222 atomic_add_int(&stcb->asoc.refcnt, 1); 6223 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6224 dst, stcb); 6225 atomic_add_int(&stcb->asoc.refcnt, -1); 6226 6227 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6228 inp == NULL) { 6229 /* we must add the source address */ 6230 /* 6231 * no scope set since we have a tcb 6232 * already 6233 */ 6234 6235 /* 6236 * we must validate the state again 6237 * here 6238 */ 6239 add_it_now: 6240 if (stcb->asoc.state == 0) { 6241 /* the assoc was freed? */ 6242 return (-7); 6243 } 6244 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6245 return (-8); 6246 } 6247 } else if (stcb_tmp == stcb) { 6248 if (stcb->asoc.state == 0) { 6249 /* the assoc was freed? */ 6250 return (-10); 6251 } 6252 if (net != NULL) { 6253 /* clear flag */ 6254 net->dest_state &= 6255 ~SCTP_ADDR_NOT_IN_ASSOC; 6256 } 6257 } else { 6258 /* 6259 * strange, address is in another 6260 * assoc? straighten out locks. 6261 */ 6262 if (stcb_tmp) { 6263 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6264 /* 6265 * in setup state we 6266 * abort this guy 6267 */ 6268 sctp_abort_an_association(stcb_tmp->sctp_ep, 6269 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6270 goto add_it_now; 6271 } 6272 SCTP_TCB_UNLOCK(stcb_tmp); 6273 } 6274 if (stcb->asoc.state == 0) { 6275 /* the assoc was freed? */ 6276 return (-12); 6277 } 6278 return (-13); 6279 } 6280 } 6281 } else 6282 #endif 6283 #ifdef INET6 6284 if (ptype == SCTP_IPV6_ADDRESS) { 6285 if (stcb->asoc.scope.ipv6_addr_legal) { 6286 /* ok get the v6 address and check/add */ 6287 struct sctp_ipv6addr_param *p6, p6_buf; 6288 6289 phdr = sctp_get_next_param(m, offset, 6290 (struct sctp_paramhdr *)&p6_buf, 6291 sizeof(p6_buf)); 6292 if (plen != sizeof(struct sctp_ipv6addr_param) || 6293 phdr == NULL) { 6294 return (-14); 6295 } 6296 p6 = (struct sctp_ipv6addr_param *)phdr; 6297 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6298 sizeof(p6->addr)); 6299 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6300 /* Skip multi-cast addresses */ 6301 goto next_param; 6302 } 6303 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6304 /* 6305 * Link local make no sense without 6306 * scope 6307 */ 6308 goto next_param; 6309 } 6310 sa = (struct sockaddr *)&sin6; 6311 inp = stcb->sctp_ep; 6312 atomic_add_int(&stcb->asoc.refcnt, 1); 6313 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6314 dst, stcb); 6315 atomic_add_int(&stcb->asoc.refcnt, -1); 6316 if (stcb_tmp == NULL && 6317 (inp == stcb->sctp_ep || inp == NULL)) { 6318 /* 6319 * we must validate the state again 6320 * here 6321 */ 6322 add_it_now6: 6323 if (stcb->asoc.state == 0) { 6324 /* the assoc was freed? */ 6325 return (-16); 6326 } 6327 /* 6328 * we must add the address, no scope 6329 * set 6330 */ 6331 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6332 return (-17); 6333 } 6334 } else if (stcb_tmp == stcb) { 6335 /* 6336 * we must validate the state again 6337 * here 6338 */ 6339 if (stcb->asoc.state == 0) { 6340 /* the assoc was freed? */ 6341 return (-19); 6342 } 6343 if (net != NULL) { 6344 /* clear flag */ 6345 net->dest_state &= 6346 ~SCTP_ADDR_NOT_IN_ASSOC; 6347 } 6348 } else { 6349 /* 6350 * strange, address is in another 6351 * assoc? straighten out locks. 6352 */ 6353 if (stcb_tmp) 6354 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6355 /* 6356 * in setup state we 6357 * abort this guy 6358 */ 6359 sctp_abort_an_association(stcb_tmp->sctp_ep, 6360 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6361 goto add_it_now6; 6362 } 6363 SCTP_TCB_UNLOCK(stcb_tmp); 6364 6365 if (stcb->asoc.state == 0) { 6366 /* the assoc was freed? */ 6367 return (-21); 6368 } 6369 return (-22); 6370 } 6371 } 6372 } else 6373 #endif 6374 if (ptype == SCTP_ECN_CAPABLE) { 6375 peer_supports_ecn = 1; 6376 } else if (ptype == SCTP_ULP_ADAPTATION) { 6377 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6378 struct sctp_adaptation_layer_indication ai, 6379 *aip; 6380 6381 phdr = sctp_get_next_param(m, offset, 6382 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6383 aip = (struct sctp_adaptation_layer_indication *)phdr; 6384 if (aip) { 6385 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6386 stcb->asoc.adaptation_needed = 1; 6387 } 6388 } 6389 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6390 struct sctp_asconf_addr_param lstore, *fee; 6391 int lptype; 6392 struct sockaddr *lsa = NULL; 6393 6394 #ifdef INET 6395 struct sctp_asconf_addrv4_param *fii; 6396 6397 #endif 6398 6399 if (stcb->asoc.asconf_supported == 0) { 6400 return (-100); 6401 } 6402 if (plen > sizeof(lstore)) { 6403 return (-23); 6404 } 6405 phdr = sctp_get_next_param(m, offset, 6406 (struct sctp_paramhdr *)&lstore, 6407 min(plen, sizeof(lstore))); 6408 if (phdr == NULL) { 6409 return (-24); 6410 } 6411 fee = (struct sctp_asconf_addr_param *)phdr; 6412 lptype = ntohs(fee->addrp.ph.param_type); 6413 switch (lptype) { 6414 #ifdef INET 6415 case SCTP_IPV4_ADDRESS: 6416 if (plen != 6417 sizeof(struct sctp_asconf_addrv4_param)) { 6418 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6419 (int)sizeof(struct sctp_asconf_addrv4_param), 6420 plen); 6421 } else { 6422 fii = (struct sctp_asconf_addrv4_param *)fee; 6423 sin.sin_addr.s_addr = fii->addrp.addr; 6424 lsa = (struct sockaddr *)&sin; 6425 } 6426 break; 6427 #endif 6428 #ifdef INET6 6429 case SCTP_IPV6_ADDRESS: 6430 if (plen != 6431 sizeof(struct sctp_asconf_addr_param)) { 6432 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6433 (int)sizeof(struct sctp_asconf_addr_param), 6434 plen); 6435 } else { 6436 memcpy(sin6.sin6_addr.s6_addr, 6437 fee->addrp.addr, 6438 sizeof(fee->addrp.addr)); 6439 lsa = (struct sockaddr *)&sin6; 6440 } 6441 break; 6442 #endif 6443 default: 6444 break; 6445 } 6446 if (lsa) { 6447 (void)sctp_set_primary_addr(stcb, sa, NULL); 6448 } 6449 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6450 stcb->asoc.peer_supports_nat = 1; 6451 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6452 /* Peer supports pr-sctp */ 6453 peer_supports_prsctp = 1; 6454 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6455 /* A supported extension chunk */ 6456 struct sctp_supported_chunk_types_param *pr_supported; 6457 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6458 int num_ent, i; 6459 6460 phdr = sctp_get_next_param(m, offset, 6461 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6462 if (phdr == NULL) { 6463 return (-25); 6464 } 6465 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6466 num_ent = plen - sizeof(struct sctp_paramhdr); 6467 for (i = 0; i < num_ent; i++) { 6468 switch (pr_supported->chunk_types[i]) { 6469 case SCTP_ASCONF: 6470 peer_supports_asconf = 1; 6471 case SCTP_ASCONF_ACK: 6472 peer_supports_asconf_ack = 1; 6473 break; 6474 case SCTP_FORWARD_CUM_TSN: 6475 peer_supports_prsctp = 1; 6476 break; 6477 case SCTP_PACKET_DROPPED: 6478 peer_supports_pktdrop = 1; 6479 break; 6480 case SCTP_NR_SELECTIVE_ACK: 6481 peer_supports_nrsack = 1; 6482 break; 6483 case SCTP_STREAM_RESET: 6484 peer_supports_reconfig = 1; 6485 break; 6486 case SCTP_AUTHENTICATION: 6487 peer_supports_auth = 1; 6488 break; 6489 default: 6490 /* one I have not learned yet */ 6491 break; 6492 6493 } 6494 } 6495 } else if (ptype == SCTP_RANDOM) { 6496 if (plen > sizeof(random_store)) 6497 break; 6498 if (got_random) { 6499 /* already processed a RANDOM */ 6500 goto next_param; 6501 } 6502 phdr = sctp_get_next_param(m, offset, 6503 (struct sctp_paramhdr *)random_store, 6504 min(sizeof(random_store), plen)); 6505 if (phdr == NULL) 6506 return (-26); 6507 p_random = (struct sctp_auth_random *)phdr; 6508 random_len = plen - sizeof(*p_random); 6509 /* enforce the random length */ 6510 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6511 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6512 return (-27); 6513 } 6514 got_random = 1; 6515 } else if (ptype == SCTP_HMAC_LIST) { 6516 uint16_t num_hmacs; 6517 uint16_t i; 6518 6519 if (plen > sizeof(hmacs_store)) 6520 break; 6521 if (got_hmacs) { 6522 /* already processed a HMAC list */ 6523 goto next_param; 6524 } 6525 phdr = sctp_get_next_param(m, offset, 6526 (struct sctp_paramhdr *)hmacs_store, 6527 min(plen, sizeof(hmacs_store))); 6528 if (phdr == NULL) 6529 return (-28); 6530 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6531 hmacs_len = plen - sizeof(*hmacs); 6532 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6533 /* validate the hmac list */ 6534 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6535 return (-29); 6536 } 6537 if (stcb->asoc.peer_hmacs != NULL) 6538 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6539 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6540 if (stcb->asoc.peer_hmacs != NULL) { 6541 for (i = 0; i < num_hmacs; i++) { 6542 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6543 ntohs(hmacs->hmac_ids[i])); 6544 } 6545 } 6546 got_hmacs = 1; 6547 } else if (ptype == SCTP_CHUNK_LIST) { 6548 int i; 6549 6550 if (plen > sizeof(chunks_store)) 6551 break; 6552 if (got_chklist) { 6553 /* already processed a Chunks list */ 6554 goto next_param; 6555 } 6556 phdr = sctp_get_next_param(m, offset, 6557 (struct sctp_paramhdr *)chunks_store, 6558 min(plen, sizeof(chunks_store))); 6559 if (phdr == NULL) 6560 return (-30); 6561 chunks = (struct sctp_auth_chunk_list *)phdr; 6562 num_chunks = plen - sizeof(*chunks); 6563 if (stcb->asoc.peer_auth_chunks != NULL) 6564 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6565 else 6566 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6567 for (i = 0; i < num_chunks; i++) { 6568 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6569 stcb->asoc.peer_auth_chunks); 6570 /* record asconf/asconf-ack if listed */ 6571 if (chunks->chunk_types[i] == SCTP_ASCONF) 6572 saw_asconf = 1; 6573 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6574 saw_asconf_ack = 1; 6575 6576 } 6577 got_chklist = 1; 6578 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6579 (ptype == SCTP_STATE_COOKIE) || 6580 (ptype == SCTP_UNRECOG_PARAM) || 6581 (ptype == SCTP_COOKIE_PRESERVE) || 6582 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6583 (ptype == SCTP_ADD_IP_ADDRESS) || 6584 (ptype == SCTP_DEL_IP_ADDRESS) || 6585 (ptype == SCTP_ERROR_CAUSE_IND) || 6586 (ptype == SCTP_SUCCESS_REPORT)) { 6587 /* don't care */ ; 6588 } else { 6589 if ((ptype & 0x8000) == 0x0000) { 6590 /* 6591 * must stop processing the rest of the 6592 * param's. Any report bits were handled 6593 * with the call to 6594 * sctp_arethere_unrecognized_parameters() 6595 * when the INIT or INIT-ACK was first seen. 6596 */ 6597 break; 6598 } 6599 } 6600 6601 next_param: 6602 offset += SCTP_SIZE32(plen); 6603 if (offset >= limit) { 6604 break; 6605 } 6606 phdr = sctp_get_next_param(m, offset, &parm_buf, 6607 sizeof(parm_buf)); 6608 } 6609 /* Now check to see if we need to purge any addresses */ 6610 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6611 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6612 SCTP_ADDR_NOT_IN_ASSOC) { 6613 /* This address has been removed from the asoc */ 6614 /* remove and free it */ 6615 stcb->asoc.numnets--; 6616 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6617 sctp_free_remote_addr(net); 6618 if (net == stcb->asoc.primary_destination) { 6619 stcb->asoc.primary_destination = NULL; 6620 sctp_select_primary_destination(stcb); 6621 } 6622 } 6623 } 6624 if ((stcb->asoc.ecn_supported == 1) && 6625 (peer_supports_ecn == 0)) { 6626 stcb->asoc.ecn_supported = 0; 6627 } 6628 if ((stcb->asoc.prsctp_supported == 1) && 6629 (peer_supports_prsctp == 0)) { 6630 stcb->asoc.prsctp_supported = 0; 6631 } 6632 if ((stcb->asoc.auth_supported == 1) && 6633 ((peer_supports_auth == 0) || 6634 (got_random == 0) || (got_hmacs == 0))) { 6635 stcb->asoc.auth_supported = 0; 6636 } 6637 if ((stcb->asoc.asconf_supported == 1) && 6638 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6639 (stcb->asoc.auth_supported == 0) || 6640 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6641 stcb->asoc.asconf_supported = 0; 6642 } 6643 if ((stcb->asoc.reconfig_supported == 1) && 6644 (peer_supports_reconfig == 0)) { 6645 stcb->asoc.reconfig_supported = 0; 6646 } 6647 if ((stcb->asoc.nrsack_supported == 1) && 6648 (peer_supports_nrsack == 0)) { 6649 stcb->asoc.nrsack_supported = 0; 6650 } 6651 if ((stcb->asoc.pktdrop_supported == 1) && 6652 (peer_supports_pktdrop == 0)) { 6653 stcb->asoc.pktdrop_supported = 0; 6654 } 6655 /* validate authentication required parameters */ 6656 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6657 /* peer does not support auth but sent a chunks list? */ 6658 return (-31); 6659 } 6660 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6661 /* peer supports asconf but not auth? */ 6662 return (-32); 6663 } else if ((peer_supports_asconf == 1) && 6664 (peer_supports_auth == 1) && 6665 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6666 return (-33); 6667 } 6668 /* concatenate the full random key */ 6669 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6670 if (chunks != NULL) { 6671 keylen += sizeof(*chunks) + num_chunks; 6672 } 6673 new_key = sctp_alloc_key(keylen); 6674 if (new_key != NULL) { 6675 /* copy in the RANDOM */ 6676 if (p_random != NULL) { 6677 keylen = sizeof(*p_random) + random_len; 6678 bcopy(p_random, new_key->key, keylen); 6679 } 6680 /* append in the AUTH chunks */ 6681 if (chunks != NULL) { 6682 bcopy(chunks, new_key->key + keylen, 6683 sizeof(*chunks) + num_chunks); 6684 keylen += sizeof(*chunks) + num_chunks; 6685 } 6686 /* append in the HMACs */ 6687 if (hmacs != NULL) { 6688 bcopy(hmacs, new_key->key + keylen, 6689 sizeof(*hmacs) + hmacs_len); 6690 } 6691 } else { 6692 /* failed to get memory for the key */ 6693 return (-34); 6694 } 6695 if (stcb->asoc.authinfo.peer_random != NULL) 6696 sctp_free_key(stcb->asoc.authinfo.peer_random); 6697 stcb->asoc.authinfo.peer_random = new_key; 6698 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6699 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6700 6701 return (0); 6702 } 6703 6704 int 6705 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6706 struct sctp_nets *net) 6707 { 6708 /* make sure the requested primary address exists in the assoc */ 6709 if (net == NULL && sa) 6710 net = sctp_findnet(stcb, sa); 6711 6712 if (net == NULL) { 6713 /* didn't find the requested primary address! */ 6714 return (-1); 6715 } else { 6716 /* set the primary address */ 6717 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6718 /* Must be confirmed, so queue to set */ 6719 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6720 return (0); 6721 } 6722 stcb->asoc.primary_destination = net; 6723 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6724 sctp_free_remote_addr(stcb->asoc.alternate); 6725 stcb->asoc.alternate = NULL; 6726 } 6727 net = TAILQ_FIRST(&stcb->asoc.nets); 6728 if (net != stcb->asoc.primary_destination) { 6729 /* 6730 * first one on the list is NOT the primary 6731 * sctp_cmpaddr() is much more efficient if the 6732 * primary is the first on the list, make it so. 6733 */ 6734 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6735 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6736 } 6737 return (0); 6738 } 6739 } 6740 6741 int 6742 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6743 { 6744 /* 6745 * This function serves two purposes. It will see if a TAG can be 6746 * re-used and return 1 for yes it is ok and 0 for don't use that 6747 * tag. A secondary function it will do is purge out old tags that 6748 * can be removed. 6749 */ 6750 struct sctpvtaghead *chain; 6751 struct sctp_tagblock *twait_block; 6752 struct sctpasochead *head; 6753 struct sctp_tcb *stcb; 6754 int i; 6755 6756 SCTP_INP_INFO_RLOCK(); 6757 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6758 SCTP_BASE_INFO(hashasocmark))]; 6759 if (head == NULL) { 6760 /* invalid vtag */ 6761 goto skip_vtag_check; 6762 } 6763 LIST_FOREACH(stcb, head, sctp_asocs) { 6764 /* 6765 * We choose not to lock anything here. TCB's can't be 6766 * removed since we have the read lock, so they can't be 6767 * freed on us, same thing for the INP. I may be wrong with 6768 * this assumption, but we will go with it for now :-) 6769 */ 6770 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6771 continue; 6772 } 6773 if (stcb->asoc.my_vtag == tag) { 6774 /* candidate */ 6775 if (stcb->rport != rport) { 6776 continue; 6777 } 6778 if (stcb->sctp_ep->sctp_lport != lport) { 6779 continue; 6780 } 6781 /* Its a used tag set */ 6782 SCTP_INP_INFO_RUNLOCK(); 6783 return (0); 6784 } 6785 } 6786 skip_vtag_check: 6787 6788 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6789 /* Now what about timed wait ? */ 6790 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6791 /* 6792 * Block(s) are present, lets see if we have this tag in the 6793 * list 6794 */ 6795 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6796 if (twait_block->vtag_block[i].v_tag == 0) { 6797 /* not used */ 6798 continue; 6799 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6800 now->tv_sec) { 6801 /* Audit expires this guy */ 6802 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6803 twait_block->vtag_block[i].v_tag = 0; 6804 twait_block->vtag_block[i].lport = 0; 6805 twait_block->vtag_block[i].rport = 0; 6806 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6807 (twait_block->vtag_block[i].lport == lport) && 6808 (twait_block->vtag_block[i].rport == rport)) { 6809 /* Bad tag, sorry :< */ 6810 SCTP_INP_INFO_RUNLOCK(); 6811 return (0); 6812 } 6813 } 6814 } 6815 SCTP_INP_INFO_RUNLOCK(); 6816 return (1); 6817 } 6818 6819 static void 6820 sctp_drain_mbufs(struct sctp_tcb *stcb) 6821 { 6822 /* 6823 * We must hunt this association for MBUF's past the cumack (i.e. 6824 * out of order data that we can renege on). 6825 */ 6826 struct sctp_association *asoc; 6827 struct sctp_tmit_chunk *chk, *nchk; 6828 uint32_t cumulative_tsn_p1; 6829 struct sctp_queued_to_read *ctl, *nctl; 6830 int cnt, strmat; 6831 uint32_t gap, i; 6832 int fnd = 0; 6833 6834 /* We look for anything larger than the cum-ack + 1 */ 6835 6836 asoc = &stcb->asoc; 6837 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6838 /* none we can reneg on. */ 6839 return; 6840 } 6841 SCTP_STAT_INCR(sctps_protocol_drains_done); 6842 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6843 cnt = 0; 6844 /* First look in the re-assembly queue */ 6845 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6846 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6847 /* Yep it is above cum-ack */ 6848 cnt++; 6849 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6850 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6851 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6852 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6853 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6854 if (chk->data) { 6855 sctp_m_freem(chk->data); 6856 chk->data = NULL; 6857 } 6858 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6859 } 6860 } 6861 /* Ok that was fun, now we will drain all the inbound streams? */ 6862 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6863 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6864 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6865 /* Yep it is above cum-ack */ 6866 cnt++; 6867 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6868 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6869 sctp_ucount_decr(asoc->cnt_on_all_streams); 6870 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6871 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6872 if (ctl->data) { 6873 sctp_m_freem(ctl->data); 6874 ctl->data = NULL; 6875 } 6876 sctp_free_remote_addr(ctl->whoFrom); 6877 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6878 SCTP_DECR_READQ_COUNT(); 6879 } 6880 } 6881 } 6882 if (cnt) { 6883 /* We must back down to see what the new highest is */ 6884 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6885 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6886 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6887 asoc->highest_tsn_inside_map = i; 6888 fnd = 1; 6889 break; 6890 } 6891 } 6892 if (!fnd) { 6893 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6894 } 6895 /* 6896 * Question, should we go through the delivery queue? The 6897 * only reason things are on here is the app not reading OR 6898 * a p-d-api up. An attacker COULD send enough in to 6899 * initiate the PD-API and then send a bunch of stuff to 6900 * other streams... these would wind up on the delivery 6901 * queue.. and then we would not get to them. But in order 6902 * to do this I then have to back-track and un-deliver 6903 * sequence numbers in streams.. el-yucko. I think for now 6904 * we will NOT look at the delivery queue and leave it to be 6905 * something to consider later. An alternative would be to 6906 * abort the P-D-API with a notification and then deliver 6907 * the data.... Or another method might be to keep track of 6908 * how many times the situation occurs and if we see a 6909 * possible attack underway just abort the association. 6910 */ 6911 #ifdef SCTP_DEBUG 6912 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6913 #endif 6914 /* 6915 * Now do we need to find a new 6916 * asoc->highest_tsn_inside_map? 6917 */ 6918 asoc->last_revoke_count = cnt; 6919 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6920 /* sa_ignore NO_NULL_CHK */ 6921 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6922 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6923 } 6924 /* 6925 * Another issue, in un-setting the TSN's in the mapping array we 6926 * DID NOT adjust the highest_tsn marker. This will cause one of 6927 * two things to occur. It may cause us to do extra work in checking 6928 * for our mapping array movement. More importantly it may cause us 6929 * to SACK every datagram. This may not be a bad thing though since 6930 * we will recover once we get our cum-ack above and all this stuff 6931 * we dumped recovered. 6932 */ 6933 } 6934 6935 void 6936 sctp_drain() 6937 { 6938 /* 6939 * We must walk the PCB lists for ALL associations here. The system 6940 * is LOW on MBUF's and needs help. This is where reneging will 6941 * occur. We really hope this does NOT happen! 6942 */ 6943 VNET_ITERATOR_DECL(vnet_iter); 6944 VNET_LIST_RLOCK_NOSLEEP(); 6945 VNET_FOREACH(vnet_iter) { 6946 CURVNET_SET(vnet_iter); 6947 struct sctp_inpcb *inp; 6948 struct sctp_tcb *stcb; 6949 6950 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6951 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6952 #ifdef VIMAGE 6953 continue; 6954 #else 6955 return; 6956 #endif 6957 } 6958 SCTP_INP_INFO_RLOCK(); 6959 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6960 /* For each endpoint */ 6961 SCTP_INP_RLOCK(inp); 6962 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6963 /* For each association */ 6964 SCTP_TCB_LOCK(stcb); 6965 sctp_drain_mbufs(stcb); 6966 SCTP_TCB_UNLOCK(stcb); 6967 } 6968 SCTP_INP_RUNLOCK(inp); 6969 } 6970 SCTP_INP_INFO_RUNLOCK(); 6971 CURVNET_RESTORE(); 6972 } 6973 VNET_LIST_RUNLOCK_NOSLEEP(); 6974 } 6975 6976 /* 6977 * start a new iterator 6978 * iterates through all endpoints and associations based on the pcb_state 6979 * flags and asoc_state. "af" (mandatory) is executed for all matching 6980 * assocs and "ef" (optional) is executed when the iterator completes. 6981 * "inpf" (optional) is executed for each new endpoint as it is being 6982 * iterated through. inpe (optional) is called when the inp completes 6983 * its way through all the stcbs. 6984 */ 6985 int 6986 sctp_initiate_iterator(inp_func inpf, 6987 asoc_func af, 6988 inp_func inpe, 6989 uint32_t pcb_state, 6990 uint32_t pcb_features, 6991 uint32_t asoc_state, 6992 void *argp, 6993 uint32_t argi, 6994 end_func ef, 6995 struct sctp_inpcb *s_inp, 6996 uint8_t chunk_output_off) 6997 { 6998 struct sctp_iterator *it = NULL; 6999 7000 if (af == NULL) { 7001 return (-1); 7002 } 7003 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 7004 SCTP_M_ITER); 7005 if (it == NULL) { 7006 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7007 return (ENOMEM); 7008 } 7009 memset(it, 0, sizeof(*it)); 7010 it->function_assoc = af; 7011 it->function_inp = inpf; 7012 if (inpf) 7013 it->done_current_ep = 0; 7014 else 7015 it->done_current_ep = 1; 7016 it->function_atend = ef; 7017 it->pointer = argp; 7018 it->val = argi; 7019 it->pcb_flags = pcb_state; 7020 it->pcb_features = pcb_features; 7021 it->asoc_state = asoc_state; 7022 it->function_inp_end = inpe; 7023 it->no_chunk_output = chunk_output_off; 7024 it->vn = curvnet; 7025 if (s_inp) { 7026 /* Assume lock is held here */ 7027 it->inp = s_inp; 7028 SCTP_INP_INCR_REF(it->inp); 7029 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7030 } else { 7031 SCTP_INP_INFO_RLOCK(); 7032 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7033 if (it->inp) { 7034 SCTP_INP_INCR_REF(it->inp); 7035 } 7036 SCTP_INP_INFO_RUNLOCK(); 7037 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7038 7039 } 7040 SCTP_IPI_ITERATOR_WQ_LOCK(); 7041 7042 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7043 if (sctp_it_ctl.iterator_running == 0) { 7044 sctp_wakeup_iterator(); 7045 } 7046 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7047 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7048 return (0); 7049 }
Cache object: 2a76d0ed94da151064247680a61d2763
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