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