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