1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_header.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_timer.h> 47 #include <netinet/sctp_bsd_addr.h> 48 #include <netinet/sctp_dtrace_define.h> 49 #include <netinet/udp.h> 50 #ifdef INET6 51 #include <netinet6/ip6_var.h> 52 #endif 53 #include <sys/sched.h> 54 #include <sys/smp.h> 55 #include <sys/unistd.h> 56 57 58 VNET_DEFINE(struct sctp_base_info, system_base_info); 59 60 /* FIX: we don't handle multiple link local scopes */ 61 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 62 #ifdef INET6 63 int 64 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 65 { 66 struct sockaddr_in6 tmp_a, tmp_b; 67 68 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 69 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 70 return (0); 71 } 72 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 73 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 74 return (0); 75 } 76 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 77 } 78 79 #endif 80 81 void 82 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 83 { 84 /* 85 * We really don't need to lock this, but I will just because it 86 * does not hurt. 87 */ 88 SCTP_INP_INFO_RLOCK(); 89 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 90 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 91 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 92 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 93 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 94 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 95 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 96 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 97 SCTP_INP_INFO_RUNLOCK(); 98 } 99 100 /*- 101 * Addresses are added to VRF's (Virtual Router's). For BSD we 102 * have only the default VRF 0. We maintain a hash list of 103 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 104 * these has a list of addresses. When we add a new address 105 * to a VRF we lookup the ifn/ifn_index, if the ifn does 106 * not exist we create it and add it to the list of IFN's 107 * within the VRF. Once we have the sctp_ifn, we add the 108 * address to the list. So we look something like: 109 * 110 * hash-vrf-table 111 * vrf-> ifn-> ifn -> ifn 112 * vrf | 113 * ... +--ifa-> ifa -> ifa 114 * vrf 115 * 116 * We keep these separate lists since the SCTP subsystem will 117 * point to these from its source address selection nets structure. 118 * When an address is deleted it does not happen right away on 119 * the SCTP side, it gets scheduled. What we do when a 120 * delete happens is immediately remove the address from 121 * the master list and decrement the refcount. As our 122 * addip iterator works through and frees the src address 123 * selection pointing to the sctp_ifa, eventually the refcount 124 * will reach 0 and we will delete it. Note that it is assumed 125 * that any locking on system level ifn/ifa is done at the 126 * caller of these functions and these routines will only 127 * lock the SCTP structures as they add or delete things. 128 * 129 * Other notes on VRF concepts. 130 * - An endpoint can be in multiple VRF's 131 * - An association lives within a VRF and only one VRF. 132 * - Any incoming packet we can deduce the VRF for by 133 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 134 * - Any downward send call or connect call must supply the 135 * VRF via ancillary data or via some sort of set default 136 * VRF socket option call (again for BSD no brainer since 137 * the VRF is always 0). 138 * - An endpoint may add multiple VRF's to it. 139 * - Listening sockets can accept associations in any 140 * of the VRF's they are in but the assoc will end up 141 * in only one VRF (gotten from the packet or connect/send). 142 * 143 */ 144 145 struct sctp_vrf * 146 sctp_allocate_vrf(int vrf_id) 147 { 148 struct sctp_vrf *vrf = NULL; 149 struct sctp_vrflist *bucket; 150 151 /* First allocate the VRF structure */ 152 vrf = sctp_find_vrf(vrf_id); 153 if (vrf) { 154 /* Already allocated */ 155 return (vrf); 156 } 157 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 158 SCTP_M_VRF); 159 if (vrf == NULL) { 160 /* No memory */ 161 #ifdef INVARIANTS 162 panic("No memory for VRF:%d", vrf_id); 163 #endif 164 return (NULL); 165 } 166 /* setup the VRF */ 167 memset(vrf, 0, sizeof(struct sctp_vrf)); 168 vrf->vrf_id = vrf_id; 169 LIST_INIT(&vrf->ifnlist); 170 vrf->total_ifa_count = 0; 171 vrf->refcount = 0; 172 /* now also setup table ids */ 173 SCTP_INIT_VRF_TABLEID(vrf); 174 /* Init the HASH of addresses */ 175 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 176 &vrf->vrf_addr_hashmark); 177 if (vrf->vrf_addr_hash == NULL) { 178 /* No memory */ 179 #ifdef INVARIANTS 180 panic("No memory for VRF:%d", vrf_id); 181 #endif 182 SCTP_FREE(vrf, SCTP_M_VRF); 183 return (NULL); 184 } 185 /* Add it to the hash table */ 186 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 187 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 188 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 189 return (vrf); 190 } 191 192 193 struct sctp_ifn * 194 sctp_find_ifn(void *ifn, uint32_t ifn_index) 195 { 196 struct sctp_ifn *sctp_ifnp; 197 struct sctp_ifnlist *hash_ifn_head; 198 199 /* 200 * We assume the lock is held for the addresses if that's wrong 201 * problems could occur :-) 202 */ 203 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 204 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 205 if (sctp_ifnp->ifn_index == ifn_index) { 206 return (sctp_ifnp); 207 } 208 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 209 return (sctp_ifnp); 210 } 211 } 212 return (NULL); 213 } 214 215 216 struct sctp_vrf * 217 sctp_find_vrf(uint32_t vrf_id) 218 { 219 struct sctp_vrflist *bucket; 220 struct sctp_vrf *liste; 221 222 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 223 LIST_FOREACH(liste, bucket, next_vrf) { 224 if (vrf_id == liste->vrf_id) { 225 return (liste); 226 } 227 } 228 return (NULL); 229 } 230 231 232 void 233 sctp_free_vrf(struct sctp_vrf *vrf) 234 { 235 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 236 if (vrf->vrf_addr_hash) { 237 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 238 vrf->vrf_addr_hash = NULL; 239 } 240 /* We zero'd the count */ 241 LIST_REMOVE(vrf, next_vrf); 242 SCTP_FREE(vrf, SCTP_M_VRF); 243 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 244 } 245 } 246 247 248 void 249 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 250 { 251 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 252 /* We zero'd the count */ 253 if (sctp_ifnp->vrf) { 254 sctp_free_vrf(sctp_ifnp->vrf); 255 } 256 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 257 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 258 } 259 } 260 261 262 void 263 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 264 { 265 struct sctp_ifn *sctp_ifnp; 266 267 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 268 if (sctp_ifnp != NULL) { 269 sctp_ifnp->ifn_mtu = mtu; 270 } 271 } 272 273 274 void 275 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 276 { 277 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 278 /* We zero'd the count */ 279 if (sctp_ifap->ifn_p) { 280 sctp_free_ifn(sctp_ifap->ifn_p); 281 } 282 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 283 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 284 } 285 } 286 287 288 static void 289 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 290 { 291 struct sctp_ifn *found; 292 293 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 294 if (found == NULL) { 295 /* Not in the list.. sorry */ 296 return; 297 } 298 if (hold_addr_lock == 0) 299 SCTP_IPI_ADDR_WLOCK(); 300 LIST_REMOVE(sctp_ifnp, next_bucket); 301 LIST_REMOVE(sctp_ifnp, next_ifn); 302 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 303 sctp_ifnp->registered_af); 304 if (hold_addr_lock == 0) 305 SCTP_IPI_ADDR_WUNLOCK(); 306 /* Take away the reference, and possibly free it */ 307 sctp_free_ifn(sctp_ifnp); 308 } 309 310 311 void 312 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 313 const char *if_name, uint32_t ifn_index) 314 { 315 struct sctp_vrf *vrf; 316 struct sctp_ifa *sctp_ifap; 317 318 SCTP_IPI_ADDR_RLOCK(); 319 vrf = sctp_find_vrf(vrf_id); 320 if (vrf == NULL) { 321 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 322 goto out; 323 324 } 325 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 326 if (sctp_ifap == NULL) { 327 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 328 goto out; 329 } 330 if (sctp_ifap->ifn_p == NULL) { 331 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 332 goto out; 333 } 334 if (if_name) { 335 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 336 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 337 sctp_ifap->ifn_p->ifn_name, if_name); 338 goto out; 339 } 340 } else { 341 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 342 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 343 sctp_ifap->ifn_p->ifn_index, ifn_index); 344 goto out; 345 } 346 } 347 348 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 349 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 350 out: 351 SCTP_IPI_ADDR_RUNLOCK(); 352 } 353 354 355 void 356 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 357 const char *if_name, uint32_t ifn_index) 358 { 359 struct sctp_vrf *vrf; 360 struct sctp_ifa *sctp_ifap; 361 362 SCTP_IPI_ADDR_RLOCK(); 363 vrf = sctp_find_vrf(vrf_id); 364 if (vrf == NULL) { 365 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 366 goto out; 367 368 } 369 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 370 if (sctp_ifap == NULL) { 371 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 372 goto out; 373 } 374 if (sctp_ifap->ifn_p == NULL) { 375 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 376 goto out; 377 } 378 if (if_name) { 379 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 380 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 381 sctp_ifap->ifn_p->ifn_name, if_name); 382 goto out; 383 } 384 } else { 385 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 386 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 387 sctp_ifap->ifn_p->ifn_index, ifn_index); 388 goto out; 389 } 390 } 391 392 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 393 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 394 out: 395 SCTP_IPI_ADDR_RUNLOCK(); 396 } 397 398 399 /*- 400 * Add an ifa to an ifn. 401 * Register the interface as necessary. 402 * NOTE: ADDR write lock MUST be held. 403 */ 404 static void 405 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 406 { 407 int ifa_af; 408 409 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 410 sctp_ifap->ifn_p = sctp_ifnp; 411 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 412 /* update address counts */ 413 sctp_ifnp->ifa_count++; 414 ifa_af = sctp_ifap->address.sa.sa_family; 415 switch (ifa_af) { 416 #ifdef INET 417 case AF_INET: 418 sctp_ifnp->num_v4++; 419 break; 420 #endif 421 #ifdef INET6 422 case AF_INET6: 423 sctp_ifnp->num_v6++; 424 break; 425 #endif 426 default: 427 break; 428 } 429 if (sctp_ifnp->ifa_count == 1) { 430 /* register the new interface */ 431 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 432 sctp_ifnp->registered_af = ifa_af; 433 } 434 } 435 436 437 /*- 438 * Remove an ifa from its ifn. 439 * If no more addresses exist, remove the ifn too. Otherwise, re-register 440 * the interface based on the remaining address families left. 441 * NOTE: ADDR write lock MUST be held. 442 */ 443 static void 444 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 445 { 446 LIST_REMOVE(sctp_ifap, next_ifa); 447 if (sctp_ifap->ifn_p) { 448 /* update address counts */ 449 sctp_ifap->ifn_p->ifa_count--; 450 switch (sctp_ifap->address.sa.sa_family) { 451 #ifdef INET 452 case AF_INET: 453 sctp_ifap->ifn_p->num_v4--; 454 break; 455 #endif 456 #ifdef INET6 457 case AF_INET6: 458 sctp_ifap->ifn_p->num_v6--; 459 break; 460 #endif 461 default: 462 break; 463 } 464 465 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 466 /* remove the ifn, possibly freeing it */ 467 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 468 } else { 469 /* re-register address family type, if needed */ 470 if ((sctp_ifap->ifn_p->num_v6 == 0) && 471 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 472 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 473 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 474 sctp_ifap->ifn_p->registered_af = AF_INET; 475 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 476 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 477 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 478 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 479 sctp_ifap->ifn_p->registered_af = AF_INET6; 480 } 481 /* free the ifn refcount */ 482 sctp_free_ifn(sctp_ifap->ifn_p); 483 } 484 sctp_ifap->ifn_p = NULL; 485 } 486 } 487 488 489 struct sctp_ifa * 490 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 491 uint32_t ifn_type, const char *if_name, void *ifa, 492 struct sockaddr *addr, uint32_t ifa_flags, 493 int dynamic_add) 494 { 495 struct sctp_vrf *vrf; 496 struct sctp_ifn *sctp_ifnp = NULL; 497 struct sctp_ifa *sctp_ifap = NULL; 498 struct sctp_ifalist *hash_addr_head; 499 struct sctp_ifnlist *hash_ifn_head; 500 uint32_t hash_of_addr; 501 int new_ifn_af = 0; 502 503 #ifdef SCTP_DEBUG 504 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 505 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 506 #endif 507 SCTP_IPI_ADDR_WLOCK(); 508 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 509 if (sctp_ifnp) { 510 vrf = sctp_ifnp->vrf; 511 } else { 512 vrf = sctp_find_vrf(vrf_id); 513 if (vrf == NULL) { 514 vrf = sctp_allocate_vrf(vrf_id); 515 if (vrf == NULL) { 516 SCTP_IPI_ADDR_WUNLOCK(); 517 return (NULL); 518 } 519 } 520 } 521 if (sctp_ifnp == NULL) { 522 /* 523 * build one and add it, can't hold lock until after malloc 524 * done though. 525 */ 526 SCTP_IPI_ADDR_WUNLOCK(); 527 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 528 sizeof(struct sctp_ifn), SCTP_M_IFN); 529 if (sctp_ifnp == NULL) { 530 #ifdef INVARIANTS 531 panic("No memory for IFN"); 532 #endif 533 return (NULL); 534 } 535 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 536 sctp_ifnp->ifn_index = ifn_index; 537 sctp_ifnp->ifn_p = ifn; 538 sctp_ifnp->ifn_type = ifn_type; 539 sctp_ifnp->refcount = 0; 540 sctp_ifnp->vrf = vrf; 541 atomic_add_int(&vrf->refcount, 1); 542 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 543 if (if_name != NULL) { 544 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 545 } else { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 547 } 548 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 549 LIST_INIT(&sctp_ifnp->ifalist); 550 SCTP_IPI_ADDR_WLOCK(); 551 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 552 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 553 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 554 new_ifn_af = 1; 555 } 556 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 557 if (sctp_ifap) { 558 /* Hmm, it already exists? */ 559 if ((sctp_ifap->ifn_p) && 560 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 561 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 562 sctp_ifap->ifn_p->ifn_name, ifn_index, 563 (void *)sctp_ifap); 564 if (new_ifn_af) { 565 /* Remove the created one that we don't want */ 566 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 567 } 568 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 569 /* easy to solve, just switch back to active */ 570 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 571 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 572 sctp_ifap->ifn_p = sctp_ifnp; 573 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 574 } 575 exit_stage_left: 576 SCTP_IPI_ADDR_WUNLOCK(); 577 return (sctp_ifap); 578 } else { 579 if (sctp_ifap->ifn_p) { 580 /* 581 * The last IFN gets the address, remove the 582 * old one 583 */ 584 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 585 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 586 sctp_ifap->ifn_p->ifn_index, if_name, 587 ifn_index); 588 /* remove the address from the old ifn */ 589 sctp_remove_ifa_from_ifn(sctp_ifap); 590 /* move the address over to the new ifn */ 591 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 592 goto exit_stage_left; 593 } else { 594 /* repair ifnp which was NULL ? */ 595 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 596 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 597 (void *)sctp_ifnp, (void *)sctp_ifap); 598 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 599 } 600 goto exit_stage_left; 601 } 602 } 603 SCTP_IPI_ADDR_WUNLOCK(); 604 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 605 if (sctp_ifap == NULL) { 606 #ifdef INVARIANTS 607 panic("No memory for IFA"); 608 #endif 609 return (NULL); 610 } 611 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 612 sctp_ifap->ifn_p = sctp_ifnp; 613 atomic_add_int(&sctp_ifnp->refcount, 1); 614 sctp_ifap->vrf_id = vrf_id; 615 sctp_ifap->ifa = ifa; 616 memcpy(&sctp_ifap->address, addr, addr->sa_len); 617 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 618 sctp_ifap->flags = ifa_flags; 619 /* Set scope */ 620 switch (sctp_ifap->address.sa.sa_family) { 621 #ifdef INET 622 case AF_INET: 623 { 624 struct sockaddr_in *sin; 625 626 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 627 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 628 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 629 sctp_ifap->src_is_loop = 1; 630 } 631 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 632 sctp_ifap->src_is_priv = 1; 633 } 634 sctp_ifnp->num_v4++; 635 if (new_ifn_af) 636 new_ifn_af = AF_INET; 637 break; 638 } 639 #endif 640 #ifdef INET6 641 case AF_INET6: 642 { 643 /* ok to use deprecated addresses? */ 644 struct sockaddr_in6 *sin6; 645 646 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 647 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 648 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 649 sctp_ifap->src_is_loop = 1; 650 } 651 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 652 sctp_ifap->src_is_priv = 1; 653 } 654 sctp_ifnp->num_v6++; 655 if (new_ifn_af) 656 new_ifn_af = AF_INET6; 657 break; 658 } 659 #endif 660 default: 661 new_ifn_af = 0; 662 break; 663 } 664 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 665 666 if ((sctp_ifap->src_is_priv == 0) && 667 (sctp_ifap->src_is_loop == 0)) { 668 sctp_ifap->src_is_glob = 1; 669 } 670 SCTP_IPI_ADDR_WLOCK(); 671 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 672 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 673 sctp_ifap->refcount = 1; 674 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 675 sctp_ifnp->ifa_count++; 676 vrf->total_ifa_count++; 677 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 678 if (new_ifn_af) { 679 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 680 sctp_ifnp->registered_af = new_ifn_af; 681 } 682 SCTP_IPI_ADDR_WUNLOCK(); 683 if (dynamic_add) { 684 /* 685 * Bump up the refcount so that when the timer completes it 686 * will drop back down. 687 */ 688 struct sctp_laddr *wi; 689 690 atomic_add_int(&sctp_ifap->refcount, 1); 691 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 692 if (wi == NULL) { 693 /* 694 * Gak, what can we do? We have lost an address 695 * change can you say HOSED? 696 */ 697 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 698 /* Opps, must decrement the count */ 699 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 700 if_name); 701 return (NULL); 702 } 703 SCTP_INCR_LADDR_COUNT(); 704 bzero(wi, sizeof(*wi)); 705 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 706 wi->ifa = sctp_ifap; 707 wi->action = SCTP_ADD_IP_ADDRESS; 708 709 SCTP_WQ_ADDR_LOCK(); 710 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 711 SCTP_WQ_ADDR_UNLOCK(); 712 713 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 714 (struct sctp_inpcb *)NULL, 715 (struct sctp_tcb *)NULL, 716 (struct sctp_nets *)NULL); 717 } else { 718 /* it's ready for use */ 719 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 720 } 721 return (sctp_ifap); 722 } 723 724 void 725 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 726 uint32_t ifn_index, const char *if_name) 727 { 728 struct sctp_vrf *vrf; 729 struct sctp_ifa *sctp_ifap = NULL; 730 731 SCTP_IPI_ADDR_WLOCK(); 732 vrf = sctp_find_vrf(vrf_id); 733 if (vrf == NULL) { 734 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 735 goto out_now; 736 } 737 #ifdef SCTP_DEBUG 738 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 739 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 740 #endif 741 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 742 if (sctp_ifap) { 743 /* Validate the delete */ 744 if (sctp_ifap->ifn_p) { 745 int valid = 0; 746 747 /*- 748 * The name has priority over the ifn_index 749 * if its given. We do this especially for 750 * panda who might recycle indexes fast. 751 */ 752 if (if_name) { 753 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 754 /* They match its a correct delete */ 755 valid = 1; 756 } 757 } 758 if (!valid) { 759 /* last ditch check ifn_index */ 760 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 761 valid = 1; 762 } 763 } 764 if (!valid) { 765 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 766 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 768 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 769 SCTP_IPI_ADDR_WUNLOCK(); 770 return; 771 } 772 } 773 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 774 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 775 sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; 776 vrf->total_ifa_count--; 777 LIST_REMOVE(sctp_ifap, next_bucket); 778 sctp_remove_ifa_from_ifn(sctp_ifap); 779 } 780 #ifdef SCTP_DEBUG 781 else { 782 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 783 ifn_index); 784 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 785 } 786 #endif 787 788 out_now: 789 SCTP_IPI_ADDR_WUNLOCK(); 790 if (sctp_ifap) { 791 struct sctp_laddr *wi; 792 793 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 794 if (wi == NULL) { 795 /* 796 * Gak, what can we do? We have lost an address 797 * change can you say HOSED? 798 */ 799 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 800 801 /* Oops, must decrement the count */ 802 sctp_free_ifa(sctp_ifap); 803 return; 804 } 805 SCTP_INCR_LADDR_COUNT(); 806 bzero(wi, sizeof(*wi)); 807 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 808 wi->ifa = sctp_ifap; 809 wi->action = SCTP_DEL_IP_ADDRESS; 810 SCTP_WQ_ADDR_LOCK(); 811 /* 812 * Should this really be a tailq? As it is we will process 813 * the newest first :-0 814 */ 815 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 816 SCTP_WQ_ADDR_UNLOCK(); 817 818 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 819 (struct sctp_inpcb *)NULL, 820 (struct sctp_tcb *)NULL, 821 (struct sctp_nets *)NULL); 822 } 823 return; 824 } 825 826 827 static int 828 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 829 { 830 int loopback_scope; 831 832 #if defined(INET) 833 int ipv4_local_scope, ipv4_addr_legal; 834 835 #endif 836 #if defined(INET6) 837 int local_scope, site_scope, ipv6_addr_legal; 838 839 #endif 840 struct sctp_vrf *vrf; 841 struct sctp_ifn *sctp_ifn; 842 struct sctp_ifa *sctp_ifa; 843 844 loopback_scope = stcb->asoc.scope.loopback_scope; 845 #if defined(INET) 846 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 847 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 848 #endif 849 #if defined(INET6) 850 local_scope = stcb->asoc.scope.local_scope; 851 site_scope = stcb->asoc.scope.site_scope; 852 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 853 #endif 854 855 SCTP_IPI_ADDR_RLOCK(); 856 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 857 if (vrf == NULL) { 858 /* no vrf, no addresses */ 859 SCTP_IPI_ADDR_RUNLOCK(); 860 return (0); 861 } 862 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 863 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 864 if ((loopback_scope == 0) && 865 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 866 continue; 867 } 868 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 869 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 870 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 871 /* 872 * We allow pending addresses, where 873 * we have sent an asconf-add to be 874 * considered valid. 875 */ 876 continue; 877 } 878 switch (sctp_ifa->address.sa.sa_family) { 879 #ifdef INET 880 case AF_INET: 881 if (ipv4_addr_legal) { 882 struct sockaddr_in *sin, 883 *rsin; 884 885 sin = &sctp_ifa->address.sin; 886 rsin = (struct sockaddr_in *)to; 887 if ((ipv4_local_scope == 0) && 888 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 889 continue; 890 } 891 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 892 SCTP_IPI_ADDR_RUNLOCK(); 893 return (1); 894 } 895 } 896 break; 897 #endif 898 #ifdef INET6 899 case AF_INET6: 900 if (ipv6_addr_legal) { 901 struct sockaddr_in6 *sin6, 902 *rsin6; 903 904 sin6 = &sctp_ifa->address.sin6; 905 rsin6 = (struct sockaddr_in6 *)to; 906 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 907 if (local_scope == 0) 908 continue; 909 if (sin6->sin6_scope_id == 0) { 910 if (sa6_recoverscope(sin6) != 0) 911 continue; 912 } 913 } 914 if ((site_scope == 0) && 915 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 916 continue; 917 } 918 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 919 SCTP_IPI_ADDR_RUNLOCK(); 920 return (1); 921 } 922 } 923 break; 924 #endif 925 default: 926 /* TSNH */ 927 break; 928 } 929 } 930 } 931 } else { 932 struct sctp_laddr *laddr; 933 934 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 935 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 936 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 937 continue; 938 } 939 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 940 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 941 /* 942 * We allow pending addresses, where we have 943 * sent an asconf-add to be considered 944 * valid. 945 */ 946 continue; 947 } 948 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 949 continue; 950 } 951 switch (to->sa_family) { 952 #ifdef INET 953 case AF_INET: 954 { 955 struct sockaddr_in *sin, *rsin; 956 957 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 958 rsin = (struct sockaddr_in *)to; 959 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 960 SCTP_IPI_ADDR_RUNLOCK(); 961 return (1); 962 } 963 break; 964 } 965 #endif 966 #ifdef INET6 967 case AF_INET6: 968 { 969 struct sockaddr_in6 *sin6, *rsin6; 970 971 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 972 rsin6 = (struct sockaddr_in6 *)to; 973 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 974 SCTP_IPI_ADDR_RUNLOCK(); 975 return (1); 976 } 977 break; 978 } 979 980 #endif 981 default: 982 /* TSNH */ 983 break; 984 } 985 986 } 987 } 988 SCTP_IPI_ADDR_RUNLOCK(); 989 return (0); 990 } 991 992 993 static struct sctp_tcb * 994 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 995 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 996 { 997 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 998 /* 999 * If we support the TCP model, then we must now dig through to see 1000 * if we can find our endpoint in the list of tcp ep's. 1001 */ 1002 uint16_t lport, rport; 1003 struct sctppcbhead *ephead; 1004 struct sctp_inpcb *inp; 1005 struct sctp_laddr *laddr; 1006 struct sctp_tcb *stcb; 1007 struct sctp_nets *net; 1008 1009 if ((to == NULL) || (from == NULL)) { 1010 return (NULL); 1011 } 1012 switch (to->sa_family) { 1013 #ifdef INET 1014 case AF_INET: 1015 if (from->sa_family == AF_INET) { 1016 lport = ((struct sockaddr_in *)to)->sin_port; 1017 rport = ((struct sockaddr_in *)from)->sin_port; 1018 } else { 1019 return (NULL); 1020 } 1021 break; 1022 #endif 1023 #ifdef INET6 1024 case AF_INET6: 1025 if (from->sa_family == AF_INET6) { 1026 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1027 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1028 } else { 1029 return (NULL); 1030 } 1031 break; 1032 #endif 1033 default: 1034 return (NULL); 1035 } 1036 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1037 /* 1038 * Ok now for each of the guys in this bucket we must look and see: 1039 * - Does the remote port match. - Does there single association's 1040 * addresses match this address (to). If so we update p_ep to point 1041 * to this ep and return the tcb from it. 1042 */ 1043 LIST_FOREACH(inp, ephead, sctp_hash) { 1044 SCTP_INP_RLOCK(inp); 1045 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1046 SCTP_INP_RUNLOCK(inp); 1047 continue; 1048 } 1049 if (lport != inp->sctp_lport) { 1050 SCTP_INP_RUNLOCK(inp); 1051 continue; 1052 } 1053 if (inp->def_vrf_id != vrf_id) { 1054 SCTP_INP_RUNLOCK(inp); 1055 continue; 1056 } 1057 /* check to see if the ep has one of the addresses */ 1058 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1059 /* We are NOT bound all, so look further */ 1060 int match = 0; 1061 1062 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1063 1064 if (laddr->ifa == NULL) { 1065 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 1066 continue; 1067 } 1068 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1069 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1070 continue; 1071 } 1072 if (laddr->ifa->address.sa.sa_family == 1073 to->sa_family) { 1074 /* see if it matches */ 1075 #ifdef INET 1076 if (from->sa_family == AF_INET) { 1077 struct sockaddr_in *intf_addr, 1078 *sin; 1079 1080 intf_addr = &laddr->ifa->address.sin; 1081 sin = (struct sockaddr_in *)to; 1082 if (sin->sin_addr.s_addr == 1083 intf_addr->sin_addr.s_addr) { 1084 match = 1; 1085 break; 1086 } 1087 } 1088 #endif 1089 #ifdef INET6 1090 if (from->sa_family == AF_INET6) { 1091 struct sockaddr_in6 *intf_addr6; 1092 struct sockaddr_in6 *sin6; 1093 1094 sin6 = (struct sockaddr_in6 *) 1095 to; 1096 intf_addr6 = &laddr->ifa->address.sin6; 1097 1098 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1099 intf_addr6)) { 1100 match = 1; 1101 break; 1102 } 1103 } 1104 #endif 1105 } 1106 } 1107 if (match == 0) { 1108 /* This endpoint does not have this address */ 1109 SCTP_INP_RUNLOCK(inp); 1110 continue; 1111 } 1112 } 1113 /* 1114 * Ok if we hit here the ep has the address, does it hold 1115 * the tcb? 1116 */ 1117 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1118 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1119 if (stcb == NULL) { 1120 SCTP_INP_RUNLOCK(inp); 1121 continue; 1122 } 1123 SCTP_TCB_LOCK(stcb); 1124 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1125 SCTP_TCB_UNLOCK(stcb); 1126 SCTP_INP_RUNLOCK(inp); 1127 continue; 1128 } 1129 if (stcb->rport != rport) { 1130 /* remote port does not match. */ 1131 SCTP_TCB_UNLOCK(stcb); 1132 SCTP_INP_RUNLOCK(inp); 1133 continue; 1134 } 1135 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1136 SCTP_TCB_UNLOCK(stcb); 1137 SCTP_INP_RUNLOCK(inp); 1138 continue; 1139 } 1140 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1141 SCTP_TCB_UNLOCK(stcb); 1142 SCTP_INP_RUNLOCK(inp); 1143 continue; 1144 } 1145 /* Does this TCB have a matching address? */ 1146 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1147 1148 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1149 /* not the same family, can't be a match */ 1150 continue; 1151 } 1152 switch (from->sa_family) { 1153 #ifdef INET 1154 case AF_INET: 1155 { 1156 struct sockaddr_in *sin, *rsin; 1157 1158 sin = (struct sockaddr_in *)&net->ro._l_addr; 1159 rsin = (struct sockaddr_in *)from; 1160 if (sin->sin_addr.s_addr == 1161 rsin->sin_addr.s_addr) { 1162 /* found it */ 1163 if (netp != NULL) { 1164 *netp = net; 1165 } 1166 /* 1167 * Update the endpoint 1168 * pointer 1169 */ 1170 *inp_p = inp; 1171 SCTP_INP_RUNLOCK(inp); 1172 return (stcb); 1173 } 1174 break; 1175 } 1176 #endif 1177 #ifdef INET6 1178 case AF_INET6: 1179 { 1180 struct sockaddr_in6 *sin6, *rsin6; 1181 1182 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1183 rsin6 = (struct sockaddr_in6 *)from; 1184 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1185 rsin6)) { 1186 /* found it */ 1187 if (netp != NULL) { 1188 *netp = net; 1189 } 1190 /* 1191 * Update the endpoint 1192 * pointer 1193 */ 1194 *inp_p = inp; 1195 SCTP_INP_RUNLOCK(inp); 1196 return (stcb); 1197 } 1198 break; 1199 } 1200 #endif 1201 default: 1202 /* TSNH */ 1203 break; 1204 } 1205 } 1206 SCTP_TCB_UNLOCK(stcb); 1207 SCTP_INP_RUNLOCK(inp); 1208 } 1209 return (NULL); 1210 } 1211 1212 1213 /* 1214 * rules for use 1215 * 1216 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1217 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1218 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1219 * NULL. 1220 */ 1221 1222 struct sctp_tcb * 1223 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1224 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1225 { 1226 struct sctpasochead *head; 1227 struct sctp_inpcb *inp; 1228 struct sctp_tcb *stcb = NULL; 1229 struct sctp_nets *net; 1230 uint16_t rport; 1231 1232 inp = *inp_p; 1233 switch (remote->sa_family) { 1234 #ifdef INET 1235 case AF_INET: 1236 rport = (((struct sockaddr_in *)remote)->sin_port); 1237 break; 1238 #endif 1239 #ifdef INET6 1240 case AF_INET6: 1241 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1242 break; 1243 #endif 1244 default: 1245 return (NULL); 1246 } 1247 if (locked_tcb) { 1248 /* 1249 * UN-lock so we can do proper locking here this occurs when 1250 * called from load_addresses_from_init. 1251 */ 1252 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1253 SCTP_TCB_UNLOCK(locked_tcb); 1254 } 1255 SCTP_INP_INFO_RLOCK(); 1256 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1257 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1258 /*- 1259 * Now either this guy is our listener or it's the 1260 * connector. If it is the one that issued the connect, then 1261 * it's only chance is to be the first TCB in the list. If 1262 * it is the acceptor, then do the special_lookup to hash 1263 * and find the real inp. 1264 */ 1265 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1266 /* to is peer addr, from is my addr */ 1267 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1268 netp, inp->def_vrf_id); 1269 if ((stcb != NULL) && (locked_tcb == NULL)) { 1270 /* we have a locked tcb, lower refcount */ 1271 SCTP_INP_DECR_REF(inp); 1272 } 1273 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1274 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1275 SCTP_TCB_LOCK(locked_tcb); 1276 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1277 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1278 } 1279 SCTP_INP_INFO_RUNLOCK(); 1280 return (stcb); 1281 } else { 1282 SCTP_INP_WLOCK(inp); 1283 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1284 goto null_return; 1285 } 1286 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1287 if (stcb == NULL) { 1288 goto null_return; 1289 } 1290 SCTP_TCB_LOCK(stcb); 1291 1292 if (stcb->rport != rport) { 1293 /* remote port does not match. */ 1294 SCTP_TCB_UNLOCK(stcb); 1295 goto null_return; 1296 } 1297 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1298 SCTP_TCB_UNLOCK(stcb); 1299 goto null_return; 1300 } 1301 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1302 SCTP_TCB_UNLOCK(stcb); 1303 goto null_return; 1304 } 1305 /* now look at the list of remote addresses */ 1306 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1307 #ifdef INVARIANTS 1308 if (net == (TAILQ_NEXT(net, sctp_next))) { 1309 panic("Corrupt net list"); 1310 } 1311 #endif 1312 if (net->ro._l_addr.sa.sa_family != 1313 remote->sa_family) { 1314 /* not the same family */ 1315 continue; 1316 } 1317 switch (remote->sa_family) { 1318 #ifdef INET 1319 case AF_INET: 1320 { 1321 struct sockaddr_in *sin, 1322 *rsin; 1323 1324 sin = (struct sockaddr_in *) 1325 &net->ro._l_addr; 1326 rsin = (struct sockaddr_in *)remote; 1327 if (sin->sin_addr.s_addr == 1328 rsin->sin_addr.s_addr) { 1329 /* found it */ 1330 if (netp != NULL) { 1331 *netp = net; 1332 } 1333 if (locked_tcb == NULL) { 1334 SCTP_INP_DECR_REF(inp); 1335 } else if (locked_tcb != stcb) { 1336 SCTP_TCB_LOCK(locked_tcb); 1337 } 1338 if (locked_tcb) { 1339 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1340 } 1341 SCTP_INP_WUNLOCK(inp); 1342 SCTP_INP_INFO_RUNLOCK(); 1343 return (stcb); 1344 } 1345 break; 1346 } 1347 #endif 1348 #ifdef INET6 1349 case AF_INET6: 1350 { 1351 struct sockaddr_in6 *sin6, 1352 *rsin6; 1353 1354 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1355 rsin6 = (struct sockaddr_in6 *)remote; 1356 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1357 rsin6)) { 1358 /* found it */ 1359 if (netp != NULL) { 1360 *netp = net; 1361 } 1362 if (locked_tcb == NULL) { 1363 SCTP_INP_DECR_REF(inp); 1364 } else if (locked_tcb != stcb) { 1365 SCTP_TCB_LOCK(locked_tcb); 1366 } 1367 if (locked_tcb) { 1368 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1369 } 1370 SCTP_INP_WUNLOCK(inp); 1371 SCTP_INP_INFO_RUNLOCK(); 1372 return (stcb); 1373 } 1374 break; 1375 } 1376 #endif 1377 default: 1378 /* TSNH */ 1379 break; 1380 } 1381 } 1382 SCTP_TCB_UNLOCK(stcb); 1383 } 1384 } else { 1385 SCTP_INP_WLOCK(inp); 1386 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1387 goto null_return; 1388 } 1389 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1390 inp->sctp_hashmark)]; 1391 if (head == NULL) { 1392 goto null_return; 1393 } 1394 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1395 if (stcb->rport != rport) { 1396 /* remote port does not match */ 1397 continue; 1398 } 1399 SCTP_TCB_LOCK(stcb); 1400 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1401 SCTP_TCB_UNLOCK(stcb); 1402 continue; 1403 } 1404 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1405 SCTP_TCB_UNLOCK(stcb); 1406 continue; 1407 } 1408 /* now look at the list of remote addresses */ 1409 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1410 #ifdef INVARIANTS 1411 if (net == (TAILQ_NEXT(net, sctp_next))) { 1412 panic("Corrupt net list"); 1413 } 1414 #endif 1415 if (net->ro._l_addr.sa.sa_family != 1416 remote->sa_family) { 1417 /* not the same family */ 1418 continue; 1419 } 1420 switch (remote->sa_family) { 1421 #ifdef INET 1422 case AF_INET: 1423 { 1424 struct sockaddr_in *sin, 1425 *rsin; 1426 1427 sin = (struct sockaddr_in *) 1428 &net->ro._l_addr; 1429 rsin = (struct sockaddr_in *)remote; 1430 if (sin->sin_addr.s_addr == 1431 rsin->sin_addr.s_addr) { 1432 /* found it */ 1433 if (netp != NULL) { 1434 *netp = net; 1435 } 1436 if (locked_tcb == NULL) { 1437 SCTP_INP_DECR_REF(inp); 1438 } else if (locked_tcb != stcb) { 1439 SCTP_TCB_LOCK(locked_tcb); 1440 } 1441 if (locked_tcb) { 1442 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1443 } 1444 SCTP_INP_WUNLOCK(inp); 1445 SCTP_INP_INFO_RUNLOCK(); 1446 return (stcb); 1447 } 1448 break; 1449 } 1450 #endif 1451 #ifdef INET6 1452 case AF_INET6: 1453 { 1454 struct sockaddr_in6 *sin6, 1455 *rsin6; 1456 1457 sin6 = (struct sockaddr_in6 *) 1458 &net->ro._l_addr; 1459 rsin6 = (struct sockaddr_in6 *)remote; 1460 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1461 rsin6)) { 1462 /* found it */ 1463 if (netp != NULL) { 1464 *netp = net; 1465 } 1466 if (locked_tcb == NULL) { 1467 SCTP_INP_DECR_REF(inp); 1468 } else if (locked_tcb != stcb) { 1469 SCTP_TCB_LOCK(locked_tcb); 1470 } 1471 if (locked_tcb) { 1472 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1473 } 1474 SCTP_INP_WUNLOCK(inp); 1475 SCTP_INP_INFO_RUNLOCK(); 1476 return (stcb); 1477 } 1478 break; 1479 } 1480 #endif 1481 default: 1482 /* TSNH */ 1483 break; 1484 } 1485 } 1486 SCTP_TCB_UNLOCK(stcb); 1487 } 1488 } 1489 null_return: 1490 /* clean up for returning null */ 1491 if (locked_tcb) { 1492 SCTP_TCB_LOCK(locked_tcb); 1493 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1494 } 1495 SCTP_INP_WUNLOCK(inp); 1496 SCTP_INP_INFO_RUNLOCK(); 1497 /* not found */ 1498 return (NULL); 1499 } 1500 1501 1502 /* 1503 * Find an association for a specific endpoint using the association id given 1504 * out in the COMM_UP notification 1505 */ 1506 struct sctp_tcb * 1507 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1508 { 1509 /* 1510 * Use my the assoc_id to find a endpoint 1511 */ 1512 struct sctpasochead *head; 1513 struct sctp_tcb *stcb; 1514 uint32_t id; 1515 1516 if (inp == NULL) { 1517 SCTP_PRINTF("TSNH ep_associd\n"); 1518 return (NULL); 1519 } 1520 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1521 SCTP_PRINTF("TSNH ep_associd0\n"); 1522 return (NULL); 1523 } 1524 id = (uint32_t) asoc_id; 1525 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1526 if (head == NULL) { 1527 /* invalid id TSNH */ 1528 SCTP_PRINTF("TSNH ep_associd1\n"); 1529 return (NULL); 1530 } 1531 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1532 if (stcb->asoc.assoc_id == id) { 1533 if (inp != stcb->sctp_ep) { 1534 /* 1535 * some other guy has the same id active (id 1536 * collision ??). 1537 */ 1538 SCTP_PRINTF("TSNH ep_associd2\n"); 1539 continue; 1540 } 1541 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1542 continue; 1543 } 1544 if (want_lock) { 1545 SCTP_TCB_LOCK(stcb); 1546 } 1547 return (stcb); 1548 } 1549 } 1550 return (NULL); 1551 } 1552 1553 1554 struct sctp_tcb * 1555 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1556 { 1557 struct sctp_tcb *stcb; 1558 1559 SCTP_INP_RLOCK(inp); 1560 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1561 SCTP_INP_RUNLOCK(inp); 1562 return (stcb); 1563 } 1564 1565 1566 /* 1567 * Endpoint probe expects that the INP_INFO is locked. 1568 */ 1569 static struct sctp_inpcb * 1570 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1571 uint16_t lport, uint32_t vrf_id) 1572 { 1573 struct sctp_inpcb *inp; 1574 struct sctp_laddr *laddr; 1575 1576 #ifdef INET 1577 struct sockaddr_in *sin; 1578 1579 #endif 1580 #ifdef INET6 1581 struct sockaddr_in6 *sin6; 1582 struct sockaddr_in6 *intf_addr6; 1583 1584 #endif 1585 int fnd; 1586 1587 #ifdef INET 1588 sin = NULL; 1589 #endif 1590 #ifdef INET6 1591 sin6 = NULL; 1592 #endif 1593 switch (nam->sa_family) { 1594 #ifdef INET 1595 case AF_INET: 1596 sin = (struct sockaddr_in *)nam; 1597 break; 1598 #endif 1599 #ifdef INET6 1600 case AF_INET6: 1601 sin6 = (struct sockaddr_in6 *)nam; 1602 break; 1603 #endif 1604 default: 1605 /* unsupported family */ 1606 return (NULL); 1607 } 1608 1609 if (head == NULL) 1610 return (NULL); 1611 1612 LIST_FOREACH(inp, head, sctp_hash) { 1613 SCTP_INP_RLOCK(inp); 1614 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1615 SCTP_INP_RUNLOCK(inp); 1616 continue; 1617 } 1618 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1619 (inp->sctp_lport == lport)) { 1620 /* got it */ 1621 #ifdef INET 1622 if ((nam->sa_family == AF_INET) && 1623 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1624 SCTP_IPV6_V6ONLY(inp)) { 1625 /* IPv4 on a IPv6 socket with ONLY IPv6 set */ 1626 SCTP_INP_RUNLOCK(inp); 1627 continue; 1628 } 1629 #endif 1630 #ifdef INET6 1631 /* A V6 address and the endpoint is NOT bound V6 */ 1632 if (nam->sa_family == AF_INET6 && 1633 (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1634 SCTP_INP_RUNLOCK(inp); 1635 continue; 1636 } 1637 #endif 1638 /* does a VRF id match? */ 1639 fnd = 0; 1640 if (inp->def_vrf_id == vrf_id) 1641 fnd = 1; 1642 1643 SCTP_INP_RUNLOCK(inp); 1644 if (!fnd) 1645 continue; 1646 return (inp); 1647 } 1648 SCTP_INP_RUNLOCK(inp); 1649 } 1650 switch (nam->sa_family) { 1651 #ifdef INET 1652 case AF_INET: 1653 if (sin->sin_addr.s_addr == INADDR_ANY) { 1654 /* Can't hunt for one that has no address specified */ 1655 return (NULL); 1656 } 1657 break; 1658 #endif 1659 #ifdef INET6 1660 case AF_INET6: 1661 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1662 /* Can't hunt for one that has no address specified */ 1663 return (NULL); 1664 } 1665 break; 1666 #endif 1667 default: 1668 break; 1669 } 1670 /* 1671 * ok, not bound to all so see if we can find a EP bound to this 1672 * address. 1673 */ 1674 LIST_FOREACH(inp, head, sctp_hash) { 1675 SCTP_INP_RLOCK(inp); 1676 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1677 SCTP_INP_RUNLOCK(inp); 1678 continue; 1679 } 1680 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1681 SCTP_INP_RUNLOCK(inp); 1682 continue; 1683 } 1684 /* 1685 * Ok this could be a likely candidate, look at all of its 1686 * addresses 1687 */ 1688 if (inp->sctp_lport != lport) { 1689 SCTP_INP_RUNLOCK(inp); 1690 continue; 1691 } 1692 /* does a VRF id match? */ 1693 fnd = 0; 1694 if (inp->def_vrf_id == vrf_id) 1695 fnd = 1; 1696 1697 if (!fnd) { 1698 SCTP_INP_RUNLOCK(inp); 1699 continue; 1700 } 1701 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1702 if (laddr->ifa == NULL) { 1703 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1704 __FUNCTION__); 1705 continue; 1706 } 1707 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1708 (void *)laddr->ifa); 1709 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1710 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1711 continue; 1712 } 1713 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1714 /* possible, see if it matches */ 1715 switch (nam->sa_family) { 1716 #ifdef INET 1717 case AF_INET: 1718 if (sin->sin_addr.s_addr == 1719 laddr->ifa->address.sin.sin_addr.s_addr) { 1720 SCTP_INP_RUNLOCK(inp); 1721 return (inp); 1722 } 1723 break; 1724 #endif 1725 #ifdef INET6 1726 case AF_INET6: 1727 intf_addr6 = &laddr->ifa->address.sin6; 1728 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1729 intf_addr6)) { 1730 SCTP_INP_RUNLOCK(inp); 1731 return (inp); 1732 } 1733 break; 1734 #endif 1735 } 1736 } 1737 } 1738 SCTP_INP_RUNLOCK(inp); 1739 } 1740 return (NULL); 1741 } 1742 1743 1744 static struct sctp_inpcb * 1745 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1746 { 1747 struct sctppcbhead *head; 1748 struct sctp_inpcb *t_inp; 1749 int fnd; 1750 1751 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1752 SCTP_BASE_INFO(hashmark))]; 1753 LIST_FOREACH(t_inp, head, sctp_hash) { 1754 if (t_inp->sctp_lport != lport) { 1755 continue; 1756 } 1757 /* is it in the VRF in question */ 1758 fnd = 0; 1759 if (t_inp->def_vrf_id == vrf_id) 1760 fnd = 1; 1761 if (!fnd) 1762 continue; 1763 1764 /* This one is in use. */ 1765 /* check the v6/v4 binding issue */ 1766 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1767 SCTP_IPV6_V6ONLY(t_inp)) { 1768 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1769 /* collision in V6 space */ 1770 return (t_inp); 1771 } else { 1772 /* inp is BOUND_V4 no conflict */ 1773 continue; 1774 } 1775 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1776 /* t_inp is bound v4 and v6, conflict always */ 1777 return (t_inp); 1778 } else { 1779 /* t_inp is bound only V4 */ 1780 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1781 SCTP_IPV6_V6ONLY(inp)) { 1782 /* no conflict */ 1783 continue; 1784 } 1785 /* else fall through to conflict */ 1786 } 1787 return (t_inp); 1788 } 1789 return (NULL); 1790 } 1791 1792 1793 int 1794 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1795 { 1796 /* For 1-2-1 with port reuse */ 1797 struct sctppcbhead *head; 1798 struct sctp_inpcb *tinp; 1799 1800 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1801 /* only works with port reuse on */ 1802 return (-1); 1803 } 1804 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1805 return (0); 1806 } 1807 SCTP_INP_RUNLOCK(inp); 1808 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1809 SCTP_BASE_INFO(hashmark))]; 1810 /* Kick out all non-listeners to the TCP hash */ 1811 LIST_FOREACH(tinp, head, sctp_hash) { 1812 if (tinp->sctp_lport != inp->sctp_lport) { 1813 continue; 1814 } 1815 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1816 continue; 1817 } 1818 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1819 continue; 1820 } 1821 if (tinp->sctp_socket->so_qlimit) { 1822 continue; 1823 } 1824 SCTP_INP_WLOCK(tinp); 1825 LIST_REMOVE(tinp, sctp_hash); 1826 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1827 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1828 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1829 SCTP_INP_WUNLOCK(tinp); 1830 } 1831 SCTP_INP_WLOCK(inp); 1832 /* Pull from where he was */ 1833 LIST_REMOVE(inp, sctp_hash); 1834 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1835 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1836 LIST_INSERT_HEAD(head, inp, sctp_hash); 1837 SCTP_INP_WUNLOCK(inp); 1838 SCTP_INP_RLOCK(inp); 1839 return (0); 1840 } 1841 1842 1843 struct sctp_inpcb * 1844 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1845 uint32_t vrf_id) 1846 { 1847 /* 1848 * First we check the hash table to see if someone has this port 1849 * bound with just the port. 1850 */ 1851 struct sctp_inpcb *inp; 1852 struct sctppcbhead *head; 1853 int lport; 1854 unsigned int i; 1855 1856 #ifdef INET 1857 struct sockaddr_in *sin; 1858 1859 #endif 1860 #ifdef INET6 1861 struct sockaddr_in6 *sin6; 1862 1863 #endif 1864 1865 switch (nam->sa_family) { 1866 #ifdef INET 1867 case AF_INET: 1868 sin = (struct sockaddr_in *)nam; 1869 lport = sin->sin_port; 1870 break; 1871 #endif 1872 #ifdef INET6 1873 case AF_INET6: 1874 sin6 = (struct sockaddr_in6 *)nam; 1875 lport = sin6->sin6_port; 1876 break; 1877 #endif 1878 default: 1879 return (NULL); 1880 } 1881 /* 1882 * I could cheat here and just cast to one of the types but we will 1883 * do it right. It also provides the check against an Unsupported 1884 * type too. 1885 */ 1886 /* Find the head of the ALLADDR chain */ 1887 if (have_lock == 0) { 1888 SCTP_INP_INFO_RLOCK(); 1889 } 1890 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1891 SCTP_BASE_INFO(hashmark))]; 1892 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1893 1894 /* 1895 * If the TCP model exists it could be that the main listening 1896 * endpoint is gone but there still exists a connected socket for 1897 * this guy. If so we can return the first one that we find. This 1898 * may NOT be the correct one so the caller should be wary on the 1899 * returned INP. Currently the only caller that sets find_tcp_pool 1900 * is in bindx where we are verifying that a user CAN bind the 1901 * address. He either has bound it already, or someone else has, or 1902 * its open to bind, so this is good enough. 1903 */ 1904 if (inp == NULL && find_tcp_pool) { 1905 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1906 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1907 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1908 if (inp) { 1909 break; 1910 } 1911 } 1912 } 1913 if (inp) { 1914 SCTP_INP_INCR_REF(inp); 1915 } 1916 if (have_lock == 0) { 1917 SCTP_INP_INFO_RUNLOCK(); 1918 } 1919 return (inp); 1920 } 1921 1922 1923 /* 1924 * Find an association for an endpoint with the pointer to whom you want to 1925 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 1926 * need to change the *to to some other struct like a mbuf... 1927 */ 1928 struct sctp_tcb * 1929 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 1930 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 1931 uint32_t vrf_id) 1932 { 1933 struct sctp_inpcb *inp = NULL; 1934 struct sctp_tcb *stcb; 1935 1936 SCTP_INP_INFO_RLOCK(); 1937 if (find_tcp_pool) { 1938 if (inp_p != NULL) { 1939 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 1940 vrf_id); 1941 } else { 1942 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 1943 vrf_id); 1944 } 1945 if (stcb != NULL) { 1946 SCTP_INP_INFO_RUNLOCK(); 1947 return (stcb); 1948 } 1949 } 1950 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 1951 if (inp_p != NULL) { 1952 *inp_p = inp; 1953 } 1954 SCTP_INP_INFO_RUNLOCK(); 1955 if (inp == NULL) { 1956 return (NULL); 1957 } 1958 /* 1959 * ok, we have an endpoint, now lets find the assoc for it (if any) 1960 * we now place the source address or from in the to of the find 1961 * endpoint call. Since in reality this chain is used from the 1962 * inbound packet side. 1963 */ 1964 if (inp_p != NULL) { 1965 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 1966 NULL); 1967 } else { 1968 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 1969 NULL); 1970 } 1971 return (stcb); 1972 } 1973 1974 1975 /* 1976 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 1977 * find all addresses that the sender has specified in any address list. Each 1978 * address will be used to lookup the TCB and see if one exits. 1979 */ 1980 static struct sctp_tcb * 1981 sctp_findassociation_special_addr(struct mbuf *m, int offset, 1982 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 1983 struct sockaddr *dst) 1984 { 1985 struct sctp_paramhdr *phdr, parm_buf; 1986 1987 #if defined(INET) || defined(INET6) 1988 struct sctp_tcb *stcb; 1989 uint16_t ptype; 1990 1991 #endif 1992 uint16_t plen; 1993 1994 #ifdef INET 1995 struct sockaddr_in sin4; 1996 1997 #endif 1998 #ifdef INET6 1999 struct sockaddr_in6 sin6; 2000 2001 #endif 2002 2003 #ifdef INET 2004 memset(&sin4, 0, sizeof(sin4)); 2005 sin4.sin_len = sizeof(sin4); 2006 sin4.sin_family = AF_INET; 2007 sin4.sin_port = sh->src_port; 2008 #endif 2009 #ifdef INET6 2010 memset(&sin6, 0, sizeof(sin6)); 2011 sin6.sin6_len = sizeof(sin6); 2012 sin6.sin6_family = AF_INET6; 2013 sin6.sin6_port = sh->src_port; 2014 #endif 2015 2016 offset += sizeof(struct sctp_init_chunk); 2017 2018 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2019 while (phdr != NULL) { 2020 /* now we must see if we want the parameter */ 2021 #if defined(INET) || defined(INET6) 2022 ptype = ntohs(phdr->param_type); 2023 #endif 2024 plen = ntohs(phdr->param_length); 2025 if (plen == 0) { 2026 break; 2027 } 2028 #ifdef INET 2029 if (ptype == SCTP_IPV4_ADDRESS && 2030 plen == sizeof(struct sctp_ipv4addr_param)) { 2031 /* Get the rest of the address */ 2032 struct sctp_ipv4addr_param ip4_parm, *p4; 2033 2034 phdr = sctp_get_next_param(m, offset, 2035 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2036 if (phdr == NULL) { 2037 return (NULL); 2038 } 2039 p4 = (struct sctp_ipv4addr_param *)phdr; 2040 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2041 /* look it up */ 2042 stcb = sctp_findassociation_ep_addr(inp_p, 2043 (struct sockaddr *)&sin4, netp, dst, NULL); 2044 if (stcb != NULL) { 2045 return (stcb); 2046 } 2047 } 2048 #endif 2049 #ifdef INET6 2050 if (ptype == SCTP_IPV6_ADDRESS && 2051 plen == sizeof(struct sctp_ipv6addr_param)) { 2052 /* Get the rest of the address */ 2053 struct sctp_ipv6addr_param ip6_parm, *p6; 2054 2055 phdr = sctp_get_next_param(m, offset, 2056 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2057 if (phdr == NULL) { 2058 return (NULL); 2059 } 2060 p6 = (struct sctp_ipv6addr_param *)phdr; 2061 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2062 /* look it up */ 2063 stcb = sctp_findassociation_ep_addr(inp_p, 2064 (struct sockaddr *)&sin6, netp, dst, NULL); 2065 if (stcb != NULL) { 2066 return (stcb); 2067 } 2068 } 2069 #endif 2070 offset += SCTP_SIZE32(plen); 2071 phdr = sctp_get_next_param(m, offset, &parm_buf, 2072 sizeof(parm_buf)); 2073 } 2074 return (NULL); 2075 } 2076 2077 static struct sctp_tcb * 2078 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2079 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2080 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2081 { 2082 /* 2083 * Use my vtag to hash. If we find it we then verify the source addr 2084 * is in the assoc. If all goes well we save a bit on rec of a 2085 * packet. 2086 */ 2087 struct sctpasochead *head; 2088 struct sctp_nets *net; 2089 struct sctp_tcb *stcb; 2090 2091 SCTP_INP_INFO_RLOCK(); 2092 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2093 SCTP_BASE_INFO(hashasocmark))]; 2094 if (head == NULL) { 2095 /* invalid vtag */ 2096 SCTP_INP_INFO_RUNLOCK(); 2097 return (NULL); 2098 } 2099 LIST_FOREACH(stcb, head, sctp_asocs) { 2100 SCTP_INP_RLOCK(stcb->sctp_ep); 2101 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2102 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2103 continue; 2104 } 2105 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2106 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2107 continue; 2108 } 2109 SCTP_TCB_LOCK(stcb); 2110 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2111 if (stcb->asoc.my_vtag == vtag) { 2112 /* candidate */ 2113 if (stcb->rport != rport) { 2114 SCTP_TCB_UNLOCK(stcb); 2115 continue; 2116 } 2117 if (stcb->sctp_ep->sctp_lport != lport) { 2118 SCTP_TCB_UNLOCK(stcb); 2119 continue; 2120 } 2121 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2122 SCTP_TCB_UNLOCK(stcb); 2123 continue; 2124 } 2125 /* RRS:Need toaddr check here */ 2126 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2127 /* Endpoint does not own this address */ 2128 SCTP_TCB_UNLOCK(stcb); 2129 continue; 2130 } 2131 if (remote_tag) { 2132 /* 2133 * If we have both vtags that's all we match 2134 * on 2135 */ 2136 if (stcb->asoc.peer_vtag == remote_tag) { 2137 /* 2138 * If both tags match we consider it 2139 * conclusive and check NO 2140 * source/destination addresses 2141 */ 2142 goto conclusive; 2143 } 2144 } 2145 if (skip_src_check) { 2146 conclusive: 2147 if (from) { 2148 *netp = sctp_findnet(stcb, from); 2149 } else { 2150 *netp = NULL; /* unknown */ 2151 } 2152 if (inp_p) 2153 *inp_p = stcb->sctp_ep; 2154 SCTP_INP_INFO_RUNLOCK(); 2155 return (stcb); 2156 } 2157 net = sctp_findnet(stcb, from); 2158 if (net) { 2159 /* yep its him. */ 2160 *netp = net; 2161 SCTP_STAT_INCR(sctps_vtagexpress); 2162 *inp_p = stcb->sctp_ep; 2163 SCTP_INP_INFO_RUNLOCK(); 2164 return (stcb); 2165 } else { 2166 /* 2167 * not him, this should only happen in rare 2168 * cases so I peg it. 2169 */ 2170 SCTP_STAT_INCR(sctps_vtagbogus); 2171 } 2172 } 2173 SCTP_TCB_UNLOCK(stcb); 2174 } 2175 SCTP_INP_INFO_RUNLOCK(); 2176 return (NULL); 2177 } 2178 2179 2180 /* 2181 * Find an association with the pointer to the inbound IP packet. This can be 2182 * a IPv4 or IPv6 packet. 2183 */ 2184 struct sctp_tcb * 2185 sctp_findassociation_addr(struct mbuf *m, int offset, 2186 struct sockaddr *src, struct sockaddr *dst, 2187 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2188 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2189 { 2190 int find_tcp_pool; 2191 struct sctp_tcb *stcb; 2192 struct sctp_inpcb *inp; 2193 2194 if (sh->v_tag) { 2195 /* we only go down this path if vtag is non-zero */ 2196 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2197 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2198 if (stcb) { 2199 return (stcb); 2200 } 2201 } 2202 find_tcp_pool = 0; 2203 if ((ch->chunk_type != SCTP_INITIATION) && 2204 (ch->chunk_type != SCTP_INITIATION_ACK) && 2205 (ch->chunk_type != SCTP_COOKIE_ACK) && 2206 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2207 /* Other chunk types go to the tcp pool. */ 2208 find_tcp_pool = 1; 2209 } 2210 if (inp_p) { 2211 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2212 find_tcp_pool, vrf_id); 2213 inp = *inp_p; 2214 } else { 2215 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2216 find_tcp_pool, vrf_id); 2217 } 2218 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2219 if (stcb == NULL && inp) { 2220 /* Found a EP but not this address */ 2221 if ((ch->chunk_type == SCTP_INITIATION) || 2222 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2223 /*- 2224 * special hook, we do NOT return linp or an 2225 * association that is linked to an existing 2226 * association that is under the TCP pool (i.e. no 2227 * listener exists). The endpoint finding routine 2228 * will always find a listener before examining the 2229 * TCP pool. 2230 */ 2231 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2232 if (inp_p) { 2233 *inp_p = NULL; 2234 } 2235 return (NULL); 2236 } 2237 stcb = sctp_findassociation_special_addr(m, 2238 offset, sh, &inp, netp, dst); 2239 if (inp_p != NULL) { 2240 *inp_p = inp; 2241 } 2242 } 2243 } 2244 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2245 return (stcb); 2246 } 2247 2248 /* 2249 * lookup an association by an ASCONF lookup address. 2250 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2251 */ 2252 struct sctp_tcb * 2253 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2254 struct sockaddr *dst, struct sctphdr *sh, 2255 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2256 { 2257 struct sctp_tcb *stcb; 2258 struct sockaddr_storage remote_store; 2259 struct sctp_paramhdr parm_buf, *phdr; 2260 int ptype; 2261 int zero_address = 0; 2262 2263 #ifdef INET 2264 struct sockaddr_in *sin; 2265 2266 #endif 2267 #ifdef INET6 2268 struct sockaddr_in6 *sin6; 2269 2270 #endif 2271 2272 memset(&remote_store, 0, sizeof(remote_store)); 2273 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2274 &parm_buf, sizeof(struct sctp_paramhdr)); 2275 if (phdr == NULL) { 2276 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2277 __FUNCTION__); 2278 return NULL; 2279 } 2280 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2281 /* get the correlation address */ 2282 switch (ptype) { 2283 #ifdef INET6 2284 case SCTP_IPV6_ADDRESS: 2285 { 2286 /* ipv6 address param */ 2287 struct sctp_ipv6addr_param *p6, p6_buf; 2288 2289 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2290 return NULL; 2291 } 2292 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2293 offset + sizeof(struct sctp_asconf_chunk), 2294 &p6_buf.ph, sizeof(*p6)); 2295 if (p6 == NULL) { 2296 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2297 __FUNCTION__); 2298 return (NULL); 2299 } 2300 sin6 = (struct sockaddr_in6 *)&remote_store; 2301 sin6->sin6_family = AF_INET6; 2302 sin6->sin6_len = sizeof(*sin6); 2303 sin6->sin6_port = sh->src_port; 2304 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2305 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2306 zero_address = 1; 2307 break; 2308 } 2309 #endif 2310 #ifdef INET 2311 case SCTP_IPV4_ADDRESS: 2312 { 2313 /* ipv4 address param */ 2314 struct sctp_ipv4addr_param *p4, p4_buf; 2315 2316 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2317 return NULL; 2318 } 2319 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2320 offset + sizeof(struct sctp_asconf_chunk), 2321 &p4_buf.ph, sizeof(*p4)); 2322 if (p4 == NULL) { 2323 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2324 __FUNCTION__); 2325 return (NULL); 2326 } 2327 sin = (struct sockaddr_in *)&remote_store; 2328 sin->sin_family = AF_INET; 2329 sin->sin_len = sizeof(*sin); 2330 sin->sin_port = sh->src_port; 2331 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2332 if (sin->sin_addr.s_addr == INADDR_ANY) 2333 zero_address = 1; 2334 break; 2335 } 2336 #endif 2337 default: 2338 /* invalid address param type */ 2339 return NULL; 2340 } 2341 2342 if (zero_address) { 2343 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2344 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2345 if (stcb != NULL) { 2346 SCTP_INP_DECR_REF(*inp_p); 2347 } 2348 } else { 2349 stcb = sctp_findassociation_ep_addr(inp_p, 2350 (struct sockaddr *)&remote_store, netp, 2351 dst, NULL); 2352 } 2353 return (stcb); 2354 } 2355 2356 2357 /* 2358 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2359 * addresses. This way if we don't get a bind we by default pick a ephemeral 2360 * port with all addresses bound. 2361 */ 2362 int 2363 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2364 { 2365 /* 2366 * we get called when a new endpoint starts up. We need to allocate 2367 * the sctp_inpcb structure from the zone and init it. Mark it as 2368 * unbound and find a port that we can use as an ephemeral with 2369 * INADDR_ANY. If the user binds later no problem we can then add in 2370 * the specific addresses. And setup the default parameters for the 2371 * EP. 2372 */ 2373 int i, error; 2374 struct sctp_inpcb *inp; 2375 struct sctp_pcb *m; 2376 struct timeval time; 2377 sctp_sharedkey_t *null_key; 2378 2379 error = 0; 2380 2381 SCTP_INP_INFO_WLOCK(); 2382 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2383 if (inp == NULL) { 2384 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2385 SCTP_INP_INFO_WUNLOCK(); 2386 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2387 return (ENOBUFS); 2388 } 2389 /* zap it */ 2390 bzero(inp, sizeof(*inp)); 2391 2392 /* bump generations */ 2393 /* setup socket pointers */ 2394 inp->sctp_socket = so; 2395 inp->ip_inp.inp.inp_socket = so; 2396 #ifdef INET6 2397 if (INP_SOCKAF(so) == AF_INET6) { 2398 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2399 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2400 } 2401 if (MODULE_GLOBAL(ip6_v6only)) { 2402 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2403 } 2404 } 2405 #endif 2406 inp->sctp_associd_counter = 1; 2407 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2408 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2409 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2410 inp->sctp_ecn_enable = SCTP_BASE_SYSCTL(sctp_ecn_enable); 2411 /* init the small hash table we use to track asocid <-> tcb */ 2412 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2413 if (inp->sctp_asocidhash == NULL) { 2414 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2415 SCTP_INP_INFO_WUNLOCK(); 2416 return (ENOBUFS); 2417 } 2418 #ifdef IPSEC 2419 { 2420 struct inpcbpolicy *pcb_sp = NULL; 2421 2422 error = ipsec_init_policy(so, &pcb_sp); 2423 /* Arrange to share the policy */ 2424 inp->ip_inp.inp.inp_sp = pcb_sp; 2425 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2426 } 2427 if (error != 0) { 2428 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2429 SCTP_INP_INFO_WUNLOCK(); 2430 return error; 2431 } 2432 #endif /* IPSEC */ 2433 SCTP_INCR_EP_COUNT(); 2434 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2435 SCTP_INP_INFO_WUNLOCK(); 2436 2437 so->so_pcb = (caddr_t)inp; 2438 2439 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2440 /* UDP style socket */ 2441 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2442 SCTP_PCB_FLAGS_UNBOUND); 2443 /* Be sure it is NON-BLOCKING IO for UDP */ 2444 /* SCTP_SET_SO_NBIO(so); */ 2445 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2446 /* TCP style socket */ 2447 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2448 SCTP_PCB_FLAGS_UNBOUND); 2449 /* Be sure we have blocking IO by default */ 2450 SCTP_CLEAR_SO_NBIO(so); 2451 } else { 2452 /* 2453 * unsupported socket type (RAW, etc)- in case we missed it 2454 * in protosw 2455 */ 2456 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2457 so->so_pcb = NULL; 2458 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2459 return (EOPNOTSUPP); 2460 } 2461 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2462 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2463 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2464 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2465 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2466 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2467 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2468 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2469 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2470 } 2471 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2472 &inp->sctp_hashmark); 2473 if (inp->sctp_tcbhash == NULL) { 2474 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2475 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2476 so->so_pcb = NULL; 2477 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2478 return (ENOBUFS); 2479 } 2480 inp->def_vrf_id = vrf_id; 2481 2482 SCTP_INP_INFO_WLOCK(); 2483 SCTP_INP_LOCK_INIT(inp); 2484 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2485 SCTP_INP_READ_INIT(inp); 2486 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2487 /* lock the new ep */ 2488 SCTP_INP_WLOCK(inp); 2489 2490 /* add it to the info area */ 2491 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2492 SCTP_INP_INFO_WUNLOCK(); 2493 2494 TAILQ_INIT(&inp->read_queue); 2495 LIST_INIT(&inp->sctp_addr_list); 2496 2497 LIST_INIT(&inp->sctp_asoc_list); 2498 2499 #ifdef SCTP_TRACK_FREED_ASOCS 2500 /* TEMP CODE */ 2501 LIST_INIT(&inp->sctp_asoc_free_list); 2502 #endif 2503 /* Init the timer structure for signature change */ 2504 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2505 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2506 2507 /* now init the actual endpoint default data */ 2508 m = &inp->sctp_ep; 2509 2510 /* setup the base timeout information */ 2511 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2512 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2513 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2514 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2515 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2516 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2517 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2518 /* all max/min max are in ms */ 2519 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2520 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2521 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2522 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2523 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2524 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2525 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2526 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2527 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2528 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2529 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2530 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2531 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2532 2533 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2534 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2535 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2536 /* number of streams to pre-open on a association */ 2537 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2538 2539 /* Add adaptation cookie */ 2540 m->adaptation_layer_indicator = 0; 2541 m->adaptation_layer_indicator_provided = 0; 2542 2543 /* seed random number generator */ 2544 m->random_counter = 1; 2545 m->store_at = SCTP_SIGNATURE_SIZE; 2546 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2547 sctp_fill_random_store(m); 2548 2549 /* Minimum cookie size */ 2550 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2551 sizeof(struct sctp_state_cookie); 2552 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2553 2554 /* Setup the initial secret */ 2555 (void)SCTP_GETTIME_TIMEVAL(&time); 2556 m->time_of_secret_change = time.tv_sec; 2557 2558 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2559 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2560 } 2561 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2562 2563 /* How long is a cookie good for ? */ 2564 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2565 /* 2566 * Initialize authentication parameters 2567 */ 2568 m->local_hmacs = sctp_default_supported_hmaclist(); 2569 m->local_auth_chunks = sctp_alloc_chunklist(); 2570 m->default_dscp = 0; 2571 #ifdef INET6 2572 m->default_flowlabel = 0; 2573 #endif 2574 m->port = 0; /* encapsulation disabled by default */ 2575 sctp_auth_set_default_chunks(m->local_auth_chunks); 2576 LIST_INIT(&m->shared_keys); 2577 /* add default NULL key as key id 0 */ 2578 null_key = sctp_alloc_sharedkey(); 2579 sctp_insert_sharedkey(&m->shared_keys, null_key); 2580 SCTP_INP_WUNLOCK(inp); 2581 #ifdef SCTP_LOG_CLOSING 2582 sctp_log_closing(inp, NULL, 12); 2583 #endif 2584 return (error); 2585 } 2586 2587 2588 void 2589 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2590 struct sctp_tcb *stcb) 2591 { 2592 struct sctp_nets *net; 2593 uint16_t lport, rport; 2594 struct sctppcbhead *head; 2595 struct sctp_laddr *laddr, *oladdr; 2596 2597 atomic_add_int(&stcb->asoc.refcnt, 1); 2598 SCTP_TCB_UNLOCK(stcb); 2599 SCTP_INP_INFO_WLOCK(); 2600 SCTP_INP_WLOCK(old_inp); 2601 SCTP_INP_WLOCK(new_inp); 2602 SCTP_TCB_LOCK(stcb); 2603 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2604 2605 new_inp->sctp_ep.time_of_secret_change = 2606 old_inp->sctp_ep.time_of_secret_change; 2607 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2608 sizeof(old_inp->sctp_ep.secret_key)); 2609 new_inp->sctp_ep.current_secret_number = 2610 old_inp->sctp_ep.current_secret_number; 2611 new_inp->sctp_ep.last_secret_number = 2612 old_inp->sctp_ep.last_secret_number; 2613 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2614 2615 /* make it so new data pours into the new socket */ 2616 stcb->sctp_socket = new_inp->sctp_socket; 2617 stcb->sctp_ep = new_inp; 2618 2619 /* Copy the port across */ 2620 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2621 rport = stcb->rport; 2622 /* Pull the tcb from the old association */ 2623 LIST_REMOVE(stcb, sctp_tcbhash); 2624 LIST_REMOVE(stcb, sctp_tcblist); 2625 if (stcb->asoc.in_asocid_hash) { 2626 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2627 } 2628 /* Now insert the new_inp into the TCP connected hash */ 2629 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2630 2631 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2632 /* Its safe to access */ 2633 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2634 2635 /* Now move the tcb into the endpoint list */ 2636 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2637 /* 2638 * Question, do we even need to worry about the ep-hash since we 2639 * only have one connection? Probably not :> so lets get rid of it 2640 * and not suck up any kernel memory in that. 2641 */ 2642 if (stcb->asoc.in_asocid_hash) { 2643 struct sctpasochead *lhd; 2644 2645 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2646 new_inp->hashasocidmark)]; 2647 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2648 } 2649 /* Ok. Let's restart timer. */ 2650 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2651 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2652 stcb, net); 2653 } 2654 2655 SCTP_INP_INFO_WUNLOCK(); 2656 if (new_inp->sctp_tcbhash != NULL) { 2657 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2658 new_inp->sctp_tcbhash = NULL; 2659 } 2660 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2661 /* Subset bound, so copy in the laddr list from the old_inp */ 2662 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2663 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2664 if (laddr == NULL) { 2665 /* 2666 * Gak, what can we do? This assoc is really 2667 * HOSED. We probably should send an abort 2668 * here. 2669 */ 2670 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2671 continue; 2672 } 2673 SCTP_INCR_LADDR_COUNT(); 2674 bzero(laddr, sizeof(*laddr)); 2675 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2676 laddr->ifa = oladdr->ifa; 2677 atomic_add_int(&laddr->ifa->refcount, 1); 2678 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2679 sctp_nxt_addr); 2680 new_inp->laddr_count++; 2681 if (oladdr == stcb->asoc.last_used_address) { 2682 stcb->asoc.last_used_address = laddr; 2683 } 2684 } 2685 } 2686 /* 2687 * Now any running timers need to be adjusted since we really don't 2688 * care if they are running or not just blast in the new_inp into 2689 * all of them. 2690 */ 2691 2692 stcb->asoc.dack_timer.ep = (void *)new_inp; 2693 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2694 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2695 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2696 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2697 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2698 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2699 /* now what about the nets? */ 2700 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2701 net->pmtu_timer.ep = (void *)new_inp; 2702 net->hb_timer.ep = (void *)new_inp; 2703 net->rxt_timer.ep = (void *)new_inp; 2704 } 2705 SCTP_INP_WUNLOCK(new_inp); 2706 SCTP_INP_WUNLOCK(old_inp); 2707 } 2708 2709 2710 2711 2712 /* sctp_ifap is used to bypass normal local address validation checks */ 2713 int 2714 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2715 struct sctp_ifa *sctp_ifap, struct thread *p) 2716 { 2717 /* bind a ep to a socket address */ 2718 struct sctppcbhead *head; 2719 struct sctp_inpcb *inp, *inp_tmp; 2720 struct inpcb *ip_inp; 2721 int port_reuse_active = 0; 2722 int bindall; 2723 uint16_t lport; 2724 int error; 2725 uint32_t vrf_id; 2726 2727 lport = 0; 2728 error = 0; 2729 bindall = 1; 2730 inp = (struct sctp_inpcb *)so->so_pcb; 2731 ip_inp = (struct inpcb *)so->so_pcb; 2732 #ifdef SCTP_DEBUG 2733 if (addr) { 2734 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2735 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2736 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2737 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2738 } 2739 #endif 2740 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2741 /* already did a bind, subsequent binds NOT allowed ! */ 2742 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2743 return (EINVAL); 2744 } 2745 #ifdef INVARIANTS 2746 if (p == NULL) 2747 panic("null proc/thread"); 2748 #endif 2749 if (addr != NULL) { 2750 switch (addr->sa_family) { 2751 #ifdef INET 2752 case AF_INET: 2753 { 2754 struct sockaddr_in *sin; 2755 2756 /* IPV6_V6ONLY socket? */ 2757 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2758 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2759 return (EINVAL); 2760 } 2761 if (addr->sa_len != sizeof(*sin)) { 2762 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2763 return (EINVAL); 2764 } 2765 sin = (struct sockaddr_in *)addr; 2766 lport = sin->sin_port; 2767 /* 2768 * For LOOPBACK the prison_local_ip4() call 2769 * will transmute the ip address to the 2770 * proper value. 2771 */ 2772 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2773 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2774 return (error); 2775 } 2776 if (sin->sin_addr.s_addr != INADDR_ANY) { 2777 bindall = 0; 2778 } 2779 break; 2780 } 2781 #endif 2782 #ifdef INET6 2783 case AF_INET6: 2784 { 2785 /* 2786 * Only for pure IPv6 Address. (No IPv4 2787 * Mapped!) 2788 */ 2789 struct sockaddr_in6 *sin6; 2790 2791 sin6 = (struct sockaddr_in6 *)addr; 2792 2793 if (addr->sa_len != sizeof(*sin6)) { 2794 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2795 return (EINVAL); 2796 } 2797 lport = sin6->sin6_port; 2798 /* 2799 * For LOOPBACK the prison_local_ip6() call 2800 * will transmute the ipv6 address to the 2801 * proper value. 2802 */ 2803 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2804 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2805 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2806 return (error); 2807 } 2808 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2809 bindall = 0; 2810 /* KAME hack: embed scopeid */ 2811 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2812 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2813 return (EINVAL); 2814 } 2815 } 2816 /* this must be cleared for ifa_ifwithaddr() */ 2817 sin6->sin6_scope_id = 0; 2818 break; 2819 } 2820 #endif 2821 default: 2822 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2823 return (EAFNOSUPPORT); 2824 } 2825 } 2826 SCTP_INP_INFO_WLOCK(); 2827 SCTP_INP_WLOCK(inp); 2828 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2829 vrf_id = inp->def_vrf_id; 2830 2831 /* increase our count due to the unlock we do */ 2832 SCTP_INP_INCR_REF(inp); 2833 if (lport) { 2834 /* 2835 * Did the caller specify a port? if so we must see if an ep 2836 * already has this one bound. 2837 */ 2838 /* got to be root to get at low ports */ 2839 if (ntohs(lport) < IPPORT_RESERVED) { 2840 if (p && (error = 2841 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2842 )) { 2843 SCTP_INP_DECR_REF(inp); 2844 SCTP_INP_WUNLOCK(inp); 2845 SCTP_INP_INFO_WUNLOCK(); 2846 return (error); 2847 } 2848 } 2849 if (p == NULL) { 2850 SCTP_INP_DECR_REF(inp); 2851 SCTP_INP_WUNLOCK(inp); 2852 SCTP_INP_INFO_WUNLOCK(); 2853 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2854 return (error); 2855 } 2856 SCTP_INP_WUNLOCK(inp); 2857 if (bindall) { 2858 vrf_id = inp->def_vrf_id; 2859 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2860 if (inp_tmp != NULL) { 2861 /* 2862 * lock guy returned and lower count note 2863 * that we are not bound so inp_tmp should 2864 * NEVER be inp. And it is this inp 2865 * (inp_tmp) that gets the reference bump, 2866 * so we must lower it. 2867 */ 2868 SCTP_INP_DECR_REF(inp_tmp); 2869 /* unlock info */ 2870 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2871 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2872 /* 2873 * Ok, must be one-2-one and 2874 * allowing port re-use 2875 */ 2876 port_reuse_active = 1; 2877 goto continue_anyway; 2878 } 2879 SCTP_INP_DECR_REF(inp); 2880 SCTP_INP_INFO_WUNLOCK(); 2881 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2882 return (EADDRINUSE); 2883 } 2884 } else { 2885 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2886 if (inp_tmp != NULL) { 2887 /* 2888 * lock guy returned and lower count note 2889 * that we are not bound so inp_tmp should 2890 * NEVER be inp. And it is this inp 2891 * (inp_tmp) that gets the reference bump, 2892 * so we must lower it. 2893 */ 2894 SCTP_INP_DECR_REF(inp_tmp); 2895 /* unlock info */ 2896 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2897 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2898 /* 2899 * Ok, must be one-2-one and 2900 * allowing port re-use 2901 */ 2902 port_reuse_active = 1; 2903 goto continue_anyway; 2904 } 2905 SCTP_INP_DECR_REF(inp); 2906 SCTP_INP_INFO_WUNLOCK(); 2907 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2908 return (EADDRINUSE); 2909 } 2910 } 2911 continue_anyway: 2912 SCTP_INP_WLOCK(inp); 2913 if (bindall) { 2914 /* verify that no lport is not used by a singleton */ 2915 if ((port_reuse_active == 0) && 2916 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2917 /* Sorry someone already has this one bound */ 2918 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2919 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2920 port_reuse_active = 1; 2921 } else { 2922 SCTP_INP_DECR_REF(inp); 2923 SCTP_INP_WUNLOCK(inp); 2924 SCTP_INP_INFO_WUNLOCK(); 2925 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2926 return (EADDRINUSE); 2927 } 2928 } 2929 } 2930 } else { 2931 uint16_t first, last, candidate; 2932 uint16_t count; 2933 int done; 2934 2935 if (ip_inp->inp_flags & INP_HIGHPORT) { 2936 first = MODULE_GLOBAL(ipport_hifirstauto); 2937 last = MODULE_GLOBAL(ipport_hilastauto); 2938 } else if (ip_inp->inp_flags & INP_LOWPORT) { 2939 if (p && (error = 2940 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2941 )) { 2942 SCTP_INP_DECR_REF(inp); 2943 SCTP_INP_WUNLOCK(inp); 2944 SCTP_INP_INFO_WUNLOCK(); 2945 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2946 return (error); 2947 } 2948 first = MODULE_GLOBAL(ipport_lowfirstauto); 2949 last = MODULE_GLOBAL(ipport_lowlastauto); 2950 } else { 2951 first = MODULE_GLOBAL(ipport_firstauto); 2952 last = MODULE_GLOBAL(ipport_lastauto); 2953 } 2954 if (first > last) { 2955 uint16_t temp; 2956 2957 temp = first; 2958 first = last; 2959 last = temp; 2960 } 2961 count = last - first + 1; /* number of candidates */ 2962 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 2963 2964 done = 0; 2965 while (!done) { 2966 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 2967 done = 1; 2968 } 2969 if (!done) { 2970 if (--count == 0) { 2971 SCTP_INP_DECR_REF(inp); 2972 SCTP_INP_WUNLOCK(inp); 2973 SCTP_INP_INFO_WUNLOCK(); 2974 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2975 return (EADDRINUSE); 2976 } 2977 if (candidate == last) 2978 candidate = first; 2979 else 2980 candidate = candidate + 1; 2981 } 2982 } 2983 lport = htons(candidate); 2984 } 2985 SCTP_INP_DECR_REF(inp); 2986 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 2987 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 2988 /* 2989 * this really should not happen. The guy did a non-blocking 2990 * bind and then did a close at the same time. 2991 */ 2992 SCTP_INP_WUNLOCK(inp); 2993 SCTP_INP_INFO_WUNLOCK(); 2994 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2995 return (EINVAL); 2996 } 2997 /* ok we look clear to give out this port, so lets setup the binding */ 2998 if (bindall) { 2999 /* binding to all addresses, so just set in the proper flags */ 3000 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3001 /* set the automatic addr changes from kernel flag */ 3002 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3003 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3004 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3005 } else { 3006 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3007 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3008 } 3009 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3010 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3011 } else { 3012 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3013 } 3014 /* 3015 * set the automatic mobility_base from kernel flag (by 3016 * micchie) 3017 */ 3018 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3019 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3020 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3021 } else { 3022 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3023 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3024 } 3025 /* 3026 * set the automatic mobility_fasthandoff from kernel flag 3027 * (by micchie) 3028 */ 3029 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3030 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3031 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3032 } else { 3033 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3034 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3035 } 3036 } else { 3037 /* 3038 * bind specific, make sure flags is off and add a new 3039 * address structure to the sctp_addr_list inside the ep 3040 * structure. 3041 * 3042 * We will need to allocate one and insert it at the head. The 3043 * socketopt call can just insert new addresses in there as 3044 * well. It will also have to do the embed scope kame hack 3045 * too (before adding). 3046 */ 3047 struct sctp_ifa *ifa; 3048 struct sockaddr_storage store_sa; 3049 3050 memset(&store_sa, 0, sizeof(store_sa)); 3051 switch (addr->sa_family) { 3052 #ifdef INET 3053 case AF_INET: 3054 { 3055 struct sockaddr_in *sin; 3056 3057 sin = (struct sockaddr_in *)&store_sa; 3058 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3059 sin->sin_port = 0; 3060 break; 3061 } 3062 #endif 3063 #ifdef INET6 3064 case AF_INET6: 3065 { 3066 struct sockaddr_in6 *sin6; 3067 3068 sin6 = (struct sockaddr_in6 *)&store_sa; 3069 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3070 sin6->sin6_port = 0; 3071 break; 3072 } 3073 #endif 3074 default: 3075 break; 3076 } 3077 /* 3078 * first find the interface with the bound address need to 3079 * zero out the port to find the address! yuck! can't do 3080 * this earlier since need port for sctp_pcb_findep() 3081 */ 3082 if (sctp_ifap != NULL) { 3083 ifa = sctp_ifap; 3084 } else { 3085 /* 3086 * Note for BSD we hit here always other O/S's will 3087 * pass things in via the sctp_ifap argument 3088 * (Panda). 3089 */ 3090 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3091 vrf_id, SCTP_ADDR_NOT_LOCKED); 3092 } 3093 if (ifa == NULL) { 3094 /* Can't find an interface with that address */ 3095 SCTP_INP_WUNLOCK(inp); 3096 SCTP_INP_INFO_WUNLOCK(); 3097 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3098 return (EADDRNOTAVAIL); 3099 } 3100 #ifdef INET6 3101 if (addr->sa_family == AF_INET6) { 3102 /* GAK, more FIXME IFA lock? */ 3103 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3104 /* Can't bind a non-existent addr. */ 3105 SCTP_INP_WUNLOCK(inp); 3106 SCTP_INP_INFO_WUNLOCK(); 3107 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3108 return (EINVAL); 3109 } 3110 } 3111 #endif 3112 /* we're not bound all */ 3113 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3114 /* allow bindx() to send ASCONF's for binding changes */ 3115 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3116 /* clear automatic addr changes from kernel flag */ 3117 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3118 3119 /* add this address to the endpoint list */ 3120 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3121 if (error != 0) { 3122 SCTP_INP_WUNLOCK(inp); 3123 SCTP_INP_INFO_WUNLOCK(); 3124 return (error); 3125 } 3126 inp->laddr_count++; 3127 } 3128 /* find the bucket */ 3129 if (port_reuse_active) { 3130 /* Put it into tcp 1-2-1 hash */ 3131 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3132 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3133 } else { 3134 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3135 } 3136 /* put it in the bucket */ 3137 LIST_INSERT_HEAD(head, inp, sctp_hash); 3138 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3139 (void *)head, ntohs(lport), port_reuse_active); 3140 /* set in the port */ 3141 inp->sctp_lport = lport; 3142 3143 /* turn off just the unbound flag */ 3144 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3145 SCTP_INP_WUNLOCK(inp); 3146 SCTP_INP_INFO_WUNLOCK(); 3147 return (0); 3148 } 3149 3150 3151 static void 3152 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3153 { 3154 struct sctp_iterator *it, *nit; 3155 3156 /* 3157 * We enter with the only the ITERATOR_LOCK in place and a write 3158 * lock on the inp_info stuff. 3159 */ 3160 it = sctp_it_ctl.cur_it; 3161 if (it && (it->vn != curvnet)) { 3162 /* Its not looking at our VNET */ 3163 return; 3164 } 3165 if (it && (it->inp == inp)) { 3166 /* 3167 * This is tricky and we hold the iterator lock, but when it 3168 * returns and gets the lock (when we release it) the 3169 * iterator will try to operate on inp. We need to stop that 3170 * from happening. But of course the iterator has a 3171 * reference on the stcb and inp. We can mark it and it will 3172 * stop. 3173 * 3174 * If its a single iterator situation, we set the end iterator 3175 * flag. Otherwise we set the iterator to go to the next 3176 * inp. 3177 * 3178 */ 3179 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3180 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3181 } else { 3182 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3183 } 3184 } 3185 /* 3186 * Now go through and remove any single reference to our inp that 3187 * may be still pending on the list 3188 */ 3189 SCTP_IPI_ITERATOR_WQ_LOCK(); 3190 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3191 if (it->vn != curvnet) { 3192 continue; 3193 } 3194 if (it->inp == inp) { 3195 /* This one points to me is it inp specific? */ 3196 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3197 /* Remove and free this one */ 3198 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3199 it, sctp_nxt_itr); 3200 if (it->function_atend != NULL) { 3201 (*it->function_atend) (it->pointer, it->val); 3202 } 3203 SCTP_FREE(it, SCTP_M_ITER); 3204 } else { 3205 it->inp = LIST_NEXT(it->inp, sctp_list); 3206 if (it->inp) { 3207 SCTP_INP_INCR_REF(it->inp); 3208 } 3209 } 3210 /* 3211 * When its put in the refcnt is incremented so decr 3212 * it 3213 */ 3214 SCTP_INP_DECR_REF(inp); 3215 } 3216 } 3217 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3218 } 3219 3220 /* release sctp_inpcb unbind the port */ 3221 void 3222 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3223 { 3224 /* 3225 * Here we free a endpoint. We must find it (if it is in the Hash 3226 * table) and remove it from there. Then we must also find it in the 3227 * overall list and remove it from there. After all removals are 3228 * complete then any timer has to be stopped. Then start the actual 3229 * freeing. a) Any local lists. b) Any associations. c) The hash of 3230 * all associations. d) finally the ep itself. 3231 */ 3232 struct sctp_tcb *asoc, *nasoc; 3233 struct sctp_laddr *laddr, *nladdr; 3234 struct inpcb *ip_pcb; 3235 struct socket *so; 3236 int being_refed = 0; 3237 struct sctp_queued_to_read *sq, *nsq; 3238 int cnt; 3239 sctp_sharedkey_t *shared_key, *nshared_key; 3240 3241 3242 #ifdef SCTP_LOG_CLOSING 3243 sctp_log_closing(inp, NULL, 0); 3244 #endif 3245 SCTP_ITERATOR_LOCK(); 3246 /* mark any iterators on the list or being processed */ 3247 sctp_iterator_inp_being_freed(inp); 3248 SCTP_ITERATOR_UNLOCK(); 3249 so = inp->sctp_socket; 3250 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3251 /* been here before.. eeks.. get out of here */ 3252 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3253 #ifdef SCTP_LOG_CLOSING 3254 sctp_log_closing(inp, NULL, 1); 3255 #endif 3256 return; 3257 } 3258 SCTP_ASOC_CREATE_LOCK(inp); 3259 SCTP_INP_INFO_WLOCK(); 3260 3261 SCTP_INP_WLOCK(inp); 3262 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3263 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3264 /* socket is gone, so no more wakeups allowed */ 3265 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3266 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3267 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3268 3269 } 3270 /* First time through we have the socket lock, after that no more. */ 3271 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3272 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3273 3274 if (inp->control) { 3275 sctp_m_freem(inp->control); 3276 inp->control = NULL; 3277 } 3278 if (inp->pkt) { 3279 sctp_m_freem(inp->pkt); 3280 inp->pkt = NULL; 3281 } 3282 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3283 * here but I will be nice :> (i.e. 3284 * ip_pcb = ep;) */ 3285 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3286 int cnt_in_sd; 3287 3288 cnt_in_sd = 0; 3289 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3290 SCTP_TCB_LOCK(asoc); 3291 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3292 /* Skip guys being freed */ 3293 cnt_in_sd++; 3294 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3295 /* 3296 * Special case - we did not start a 3297 * kill timer on the asoc due to it 3298 * was not closed. So go ahead and 3299 * start it now. 3300 */ 3301 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3302 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3303 } 3304 SCTP_TCB_UNLOCK(asoc); 3305 continue; 3306 } 3307 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3308 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3309 (asoc->asoc.total_output_queue_size == 0)) { 3310 /* 3311 * If we have data in queue, we don't want 3312 * to just free since the app may have done, 3313 * send()/close or connect/send/close. And 3314 * it wants the data to get across first. 3315 */ 3316 /* Just abandon things in the front states */ 3317 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3318 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3319 cnt_in_sd++; 3320 } 3321 continue; 3322 } 3323 /* Disconnect the socket please */ 3324 asoc->sctp_socket = NULL; 3325 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3326 if ((asoc->asoc.size_on_reasm_queue > 0) || 3327 (asoc->asoc.control_pdapi) || 3328 (asoc->asoc.size_on_all_streams > 0) || 3329 (so && (so->so_rcv.sb_cc > 0))) { 3330 /* Left with Data unread */ 3331 struct mbuf *op_err; 3332 3333 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3334 0, M_NOWAIT, 1, MT_DATA); 3335 if (op_err) { 3336 /* Fill in the user initiated abort */ 3337 struct sctp_paramhdr *ph; 3338 3339 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 3340 ph = mtod(op_err, struct sctp_paramhdr *); 3341 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 3342 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3343 } 3344 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3345 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3346 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3347 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3348 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3349 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3350 } 3351 if (sctp_free_assoc(inp, asoc, 3352 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3353 cnt_in_sd++; 3354 } 3355 continue; 3356 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3357 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3358 (asoc->asoc.stream_queue_cnt == 0)) { 3359 if (asoc->asoc.locked_on_sending) { 3360 goto abort_anyway; 3361 } 3362 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3363 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3364 struct sctp_nets *netp; 3365 3366 /* 3367 * there is nothing queued to send, 3368 * so I send shutdown 3369 */ 3370 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3371 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3372 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3373 } 3374 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3375 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3376 sctp_stop_timers_for_shutdown(asoc); 3377 if (asoc->asoc.alternate) { 3378 netp = asoc->asoc.alternate; 3379 } else { 3380 netp = asoc->asoc.primary_destination; 3381 } 3382 sctp_send_shutdown(asoc, netp); 3383 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3384 netp); 3385 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3386 asoc->asoc.primary_destination); 3387 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3388 } 3389 } else { 3390 /* mark into shutdown pending */ 3391 struct sctp_stream_queue_pending *sp; 3392 3393 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3394 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3395 asoc->asoc.primary_destination); 3396 if (asoc->asoc.locked_on_sending) { 3397 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3398 sctp_streamhead); 3399 if (sp == NULL) { 3400 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3401 (void *)asoc->asoc.locked_on_sending, 3402 asoc->asoc.locked_on_sending->stream_no); 3403 } else { 3404 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3405 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3406 } 3407 } 3408 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3409 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3410 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3411 struct mbuf *op_err; 3412 3413 abort_anyway: 3414 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3415 0, M_NOWAIT, 1, MT_DATA); 3416 if (op_err) { 3417 /* 3418 * Fill in the user 3419 * initiated abort 3420 */ 3421 struct sctp_paramhdr *ph; 3422 3423 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 3424 ph = mtod(op_err, struct sctp_paramhdr *); 3425 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 3426 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3427 } 3428 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3429 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3430 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3431 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3432 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3433 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3434 } 3435 if (sctp_free_assoc(inp, asoc, 3436 SCTP_PCBFREE_NOFORCE, 3437 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3438 cnt_in_sd++; 3439 } 3440 continue; 3441 } else { 3442 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3443 } 3444 } 3445 cnt_in_sd++; 3446 SCTP_TCB_UNLOCK(asoc); 3447 } 3448 /* now is there some left in our SHUTDOWN state? */ 3449 if (cnt_in_sd) { 3450 #ifdef SCTP_LOG_CLOSING 3451 sctp_log_closing(inp, NULL, 2); 3452 #endif 3453 inp->sctp_socket = NULL; 3454 SCTP_INP_WUNLOCK(inp); 3455 SCTP_ASOC_CREATE_UNLOCK(inp); 3456 SCTP_INP_INFO_WUNLOCK(); 3457 return; 3458 } 3459 } 3460 inp->sctp_socket = NULL; 3461 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3462 SCTP_PCB_FLAGS_UNBOUND) { 3463 /* 3464 * ok, this guy has been bound. It's port is somewhere in 3465 * the SCTP_BASE_INFO(hash table). Remove it! 3466 */ 3467 LIST_REMOVE(inp, sctp_hash); 3468 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3469 } 3470 /* 3471 * If there is a timer running to kill us, forget it, since it may 3472 * have a contest on the INP lock.. which would cause us to die ... 3473 */ 3474 cnt = 0; 3475 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3476 SCTP_TCB_LOCK(asoc); 3477 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3478 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3479 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3480 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3481 } 3482 cnt++; 3483 SCTP_TCB_UNLOCK(asoc); 3484 continue; 3485 } 3486 /* Free associations that are NOT killing us */ 3487 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3488 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3489 struct mbuf *op_err; 3490 3491 op_err = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 3492 0, M_NOWAIT, 1, MT_DATA); 3493 if (op_err) { 3494 /* Fill in the user initiated abort */ 3495 struct sctp_paramhdr *ph; 3496 3497 SCTP_BUF_LEN(op_err) = sizeof(struct sctp_paramhdr); 3498 ph = mtod(op_err, struct sctp_paramhdr *); 3499 ph->param_type = htons(SCTP_CAUSE_USER_INITIATED_ABT); 3500 ph->param_length = htons(SCTP_BUF_LEN(op_err)); 3501 } 3502 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3503 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3504 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3505 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3506 cnt++; 3507 SCTP_TCB_UNLOCK(asoc); 3508 continue; 3509 } 3510 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3511 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3512 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3513 } 3514 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3515 cnt++; 3516 } 3517 } 3518 if (cnt) { 3519 /* Ok we have someone out there that will kill us */ 3520 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3521 #ifdef SCTP_LOG_CLOSING 3522 sctp_log_closing(inp, NULL, 3); 3523 #endif 3524 SCTP_INP_WUNLOCK(inp); 3525 SCTP_ASOC_CREATE_UNLOCK(inp); 3526 SCTP_INP_INFO_WUNLOCK(); 3527 return; 3528 } 3529 if (SCTP_INP_LOCK_CONTENDED(inp)) 3530 being_refed++; 3531 if (SCTP_INP_READ_CONTENDED(inp)) 3532 being_refed++; 3533 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3534 being_refed++; 3535 3536 if ((inp->refcount) || 3537 (being_refed) || 3538 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3539 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3540 #ifdef SCTP_LOG_CLOSING 3541 sctp_log_closing(inp, NULL, 4); 3542 #endif 3543 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3544 SCTP_INP_WUNLOCK(inp); 3545 SCTP_ASOC_CREATE_UNLOCK(inp); 3546 SCTP_INP_INFO_WUNLOCK(); 3547 return; 3548 } 3549 inp->sctp_ep.signature_change.type = 0; 3550 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3551 /* 3552 * Remove it from the list .. last thing we need a lock for. 3553 */ 3554 LIST_REMOVE(inp, sctp_list); 3555 SCTP_INP_WUNLOCK(inp); 3556 SCTP_ASOC_CREATE_UNLOCK(inp); 3557 SCTP_INP_INFO_WUNLOCK(); 3558 /* 3559 * Now we release all locks. Since this INP cannot be found anymore 3560 * except possibly by the kill timer that might be running. We call 3561 * the drain function here. It should hit the case were it sees the 3562 * ACTIVE flag cleared and exit out freeing us to proceed and 3563 * destroy everything. 3564 */ 3565 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3566 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3567 } else { 3568 /* Probably un-needed */ 3569 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3570 } 3571 3572 #ifdef SCTP_LOG_CLOSING 3573 sctp_log_closing(inp, NULL, 5); 3574 #endif 3575 3576 3577 if ((inp->sctp_asocidhash) != NULL) { 3578 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3579 inp->sctp_asocidhash = NULL; 3580 } 3581 /* sa_ignore FREED_MEMORY */ 3582 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3583 /* Its only abandoned if it had data left */ 3584 if (sq->length) 3585 SCTP_STAT_INCR(sctps_left_abandon); 3586 3587 TAILQ_REMOVE(&inp->read_queue, sq, next); 3588 sctp_free_remote_addr(sq->whoFrom); 3589 if (so) 3590 so->so_rcv.sb_cc -= sq->length; 3591 if (sq->data) { 3592 sctp_m_freem(sq->data); 3593 sq->data = NULL; 3594 } 3595 /* 3596 * no need to free the net count, since at this point all 3597 * assoc's are gone. 3598 */ 3599 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3600 SCTP_DECR_READQ_COUNT(); 3601 } 3602 /* Now the sctp_pcb things */ 3603 /* 3604 * free each asoc if it is not already closed/free. we can't use the 3605 * macro here since le_next will get freed as part of the 3606 * sctp_free_assoc() call. 3607 */ 3608 if (so) { 3609 #ifdef IPSEC 3610 ipsec_delete_pcbpolicy(ip_pcb); 3611 #endif /* IPSEC */ 3612 3613 /* Unlocks not needed since the socket is gone now */ 3614 } 3615 if (ip_pcb->inp_options) { 3616 (void)sctp_m_free(ip_pcb->inp_options); 3617 ip_pcb->inp_options = 0; 3618 } 3619 #ifdef INET6 3620 if (ip_pcb->inp_vflag & INP_IPV6) { 3621 struct in6pcb *in6p; 3622 3623 in6p = (struct in6pcb *)inp; 3624 ip6_freepcbopts(in6p->in6p_outputopts); 3625 } 3626 #endif /* INET6 */ 3627 ip_pcb->inp_vflag = 0; 3628 /* free up authentication fields */ 3629 if (inp->sctp_ep.local_auth_chunks != NULL) 3630 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3631 if (inp->sctp_ep.local_hmacs != NULL) 3632 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3633 3634 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3635 LIST_REMOVE(shared_key, next); 3636 sctp_free_sharedkey(shared_key); 3637 /* sa_ignore FREED_MEMORY */ 3638 } 3639 3640 /* 3641 * if we have an address list the following will free the list of 3642 * ifaddr's that are set into this ep. Again macro limitations here, 3643 * since the LIST_FOREACH could be a bad idea. 3644 */ 3645 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3646 sctp_remove_laddr(laddr); 3647 } 3648 3649 #ifdef SCTP_TRACK_FREED_ASOCS 3650 /* TEMP CODE */ 3651 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3652 LIST_REMOVE(asoc, sctp_tcblist); 3653 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3654 SCTP_DECR_ASOC_COUNT(); 3655 } 3656 /* *** END TEMP CODE *** */ 3657 #endif 3658 /* Now lets see about freeing the EP hash table. */ 3659 if (inp->sctp_tcbhash != NULL) { 3660 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3661 inp->sctp_tcbhash = NULL; 3662 } 3663 /* Now we must put the ep memory back into the zone pool */ 3664 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3665 SCTP_INP_LOCK_DESTROY(inp); 3666 SCTP_INP_READ_DESTROY(inp); 3667 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3668 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3669 SCTP_DECR_EP_COUNT(); 3670 } 3671 3672 3673 struct sctp_nets * 3674 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3675 { 3676 struct sctp_nets *net; 3677 3678 /* locate the address */ 3679 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3680 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3681 return (net); 3682 } 3683 return (NULL); 3684 } 3685 3686 3687 int 3688 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3689 { 3690 struct sctp_ifa *sctp_ifa; 3691 3692 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3693 if (sctp_ifa) { 3694 return (1); 3695 } else { 3696 return (0); 3697 } 3698 } 3699 3700 /* 3701 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3702 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3703 * stats of stuff. 3704 */ 3705 int 3706 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3707 struct sctp_nets **netp, int set_scope, int from) 3708 { 3709 /* 3710 * The following is redundant to the same lines in the 3711 * sctp_aloc_assoc() but is needed since others call the add address 3712 * function 3713 */ 3714 struct sctp_nets *net, *netfirst; 3715 int addr_inscope; 3716 3717 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3718 from); 3719 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3720 3721 netfirst = sctp_findnet(stcb, newaddr); 3722 if (netfirst) { 3723 /* 3724 * Lie and return ok, we don't want to make the association 3725 * go away for this behavior. It will happen in the TCP 3726 * model in a connected socket. It does not reach the hash 3727 * table until after the association is built so it can't be 3728 * found. Mark as reachable, since the initial creation will 3729 * have been cleared and the NOT_IN_ASSOC flag will have 3730 * been added... and we don't want to end up removing it 3731 * back out. 3732 */ 3733 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3734 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3735 SCTP_ADDR_UNCONFIRMED); 3736 } else { 3737 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3738 } 3739 3740 return (0); 3741 } 3742 addr_inscope = 1; 3743 switch (newaddr->sa_family) { 3744 #ifdef INET 3745 case AF_INET: 3746 { 3747 struct sockaddr_in *sin; 3748 3749 sin = (struct sockaddr_in *)newaddr; 3750 if (sin->sin_addr.s_addr == 0) { 3751 /* Invalid address */ 3752 return (-1); 3753 } 3754 /* zero out the bzero area */ 3755 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3756 3757 /* assure len is set */ 3758 sin->sin_len = sizeof(struct sockaddr_in); 3759 if (set_scope) { 3760 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3761 stcb->asoc.scope.ipv4_local_scope = 1; 3762 #else 3763 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3764 stcb->asoc.scope.ipv4_local_scope = 1; 3765 } 3766 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3767 } else { 3768 /* Validate the address is in scope */ 3769 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3770 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3771 addr_inscope = 0; 3772 } 3773 } 3774 break; 3775 } 3776 #endif 3777 #ifdef INET6 3778 case AF_INET6: 3779 { 3780 struct sockaddr_in6 *sin6; 3781 3782 sin6 = (struct sockaddr_in6 *)newaddr; 3783 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3784 /* Invalid address */ 3785 return (-1); 3786 } 3787 /* assure len is set */ 3788 sin6->sin6_len = sizeof(struct sockaddr_in6); 3789 if (set_scope) { 3790 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3791 stcb->asoc.scope.loopback_scope = 1; 3792 stcb->asoc.scope.local_scope = 0; 3793 stcb->asoc.scope.ipv4_local_scope = 1; 3794 stcb->asoc.scope.site_scope = 1; 3795 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3796 /* 3797 * If the new destination is a 3798 * LINK_LOCAL we must have common 3799 * site scope. Don't set the local 3800 * scope since we may not share all 3801 * links, only loopback can do this. 3802 * Links on the local network would 3803 * also be on our private network 3804 * for v4 too. 3805 */ 3806 stcb->asoc.scope.ipv4_local_scope = 1; 3807 stcb->asoc.scope.site_scope = 1; 3808 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3809 /* 3810 * If the new destination is 3811 * SITE_LOCAL then we must have site 3812 * scope in common. 3813 */ 3814 stcb->asoc.scope.site_scope = 1; 3815 } 3816 } else { 3817 /* Validate the address is in scope */ 3818 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3819 (stcb->asoc.scope.loopback_scope == 0)) { 3820 addr_inscope = 0; 3821 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3822 (stcb->asoc.scope.local_scope == 0)) { 3823 addr_inscope = 0; 3824 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3825 (stcb->asoc.scope.site_scope == 0)) { 3826 addr_inscope = 0; 3827 } 3828 } 3829 break; 3830 } 3831 #endif 3832 default: 3833 /* not supported family type */ 3834 return (-1); 3835 } 3836 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3837 if (net == NULL) { 3838 return (-1); 3839 } 3840 SCTP_INCR_RADDR_COUNT(); 3841 bzero(net, sizeof(struct sctp_nets)); 3842 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3843 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3844 switch (newaddr->sa_family) { 3845 #ifdef INET 3846 case AF_INET: 3847 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3848 break; 3849 #endif 3850 #ifdef INET6 3851 case AF_INET6: 3852 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3853 break; 3854 #endif 3855 default: 3856 break; 3857 } 3858 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3859 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3860 stcb->asoc.scope.loopback_scope = 1; 3861 stcb->asoc.scope.ipv4_local_scope = 1; 3862 stcb->asoc.scope.local_scope = 0; 3863 stcb->asoc.scope.site_scope = 1; 3864 addr_inscope = 1; 3865 } 3866 net->failure_threshold = stcb->asoc.def_net_failure; 3867 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3868 if (addr_inscope == 0) { 3869 net->dest_state = (SCTP_ADDR_REACHABLE | 3870 SCTP_ADDR_OUT_OF_SCOPE); 3871 } else { 3872 if (from == SCTP_ADDR_IS_CONFIRMED) 3873 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3874 net->dest_state = SCTP_ADDR_REACHABLE; 3875 else 3876 net->dest_state = SCTP_ADDR_REACHABLE | 3877 SCTP_ADDR_UNCONFIRMED; 3878 } 3879 /* 3880 * We set this to 0, the timer code knows that this means its an 3881 * initial value 3882 */ 3883 net->rto_needed = 1; 3884 net->RTO = 0; 3885 net->RTO_measured = 0; 3886 stcb->asoc.numnets++; 3887 net->ref_count = 1; 3888 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3889 net->port = stcb->asoc.port; 3890 net->dscp = stcb->asoc.default_dscp; 3891 #ifdef INET6 3892 net->flowlabel = stcb->asoc.default_flowlabel; 3893 #endif 3894 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3895 net->dest_state |= SCTP_ADDR_NOHB; 3896 } else { 3897 net->dest_state &= ~SCTP_ADDR_NOHB; 3898 } 3899 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3900 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3901 } else { 3902 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3903 } 3904 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3905 /* Init the timer structure */ 3906 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3907 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3908 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3909 3910 /* Now generate a route for this guy */ 3911 #ifdef INET6 3912 /* KAME hack: embed scopeid */ 3913 if (newaddr->sa_family == AF_INET6) { 3914 struct sockaddr_in6 *sin6; 3915 3916 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3917 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3918 sin6->sin6_scope_id = 0; 3919 } 3920 #endif 3921 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3922 3923 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3924 /* Get source address */ 3925 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3926 stcb, 3927 (sctp_route_t *) & net->ro, 3928 net, 3929 0, 3930 stcb->asoc.vrf_id); 3931 /* Now get the interface MTU */ 3932 if (net->ro._s_addr && net->ro._s_addr->ifn_p) { 3933 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3934 } 3935 if (net->mtu > 0) { 3936 uint32_t rmtu; 3937 3938 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3939 if (rmtu == 0) { 3940 /* 3941 * Start things off to match mtu of 3942 * interface please. 3943 */ 3944 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3945 net->ro.ro_rt, net->mtu); 3946 } else { 3947 /* 3948 * we take the route mtu over the interface, 3949 * since the route may be leading out the 3950 * loopback, or a different interface. 3951 */ 3952 net->mtu = rmtu; 3953 } 3954 } 3955 } 3956 if (net->mtu == 0) { 3957 switch (newaddr->sa_family) { 3958 #ifdef INET 3959 case AF_INET: 3960 net->mtu = SCTP_DEFAULT_MTU; 3961 break; 3962 #endif 3963 #ifdef INET6 3964 case AF_INET6: 3965 net->mtu = 1280; 3966 break; 3967 #endif 3968 default: 3969 break; 3970 } 3971 } 3972 if (net->port) { 3973 net->mtu -= (uint32_t) sizeof(struct udphdr); 3974 } 3975 if (from == SCTP_ALLOC_ASOC) { 3976 stcb->asoc.smallest_mtu = net->mtu; 3977 } 3978 if (stcb->asoc.smallest_mtu > net->mtu) { 3979 stcb->asoc.smallest_mtu = net->mtu; 3980 } 3981 #ifdef INET6 3982 if (newaddr->sa_family == AF_INET6) { 3983 struct sockaddr_in6 *sin6; 3984 3985 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3986 (void)sa6_recoverscope(sin6); 3987 } 3988 #endif 3989 3990 /* JRS - Use the congestion control given in the CC module */ 3991 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 3992 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 3993 3994 /* 3995 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 3996 * of assoc (2005/06/27, iyengar@cis.udel.edu) 3997 */ 3998 net->find_pseudo_cumack = 1; 3999 net->find_rtx_pseudo_cumack = 1; 4000 net->src_addr_selected = 0; 4001 /* Choose an initial flowid. */ 4002 net->flowid = stcb->asoc.my_vtag ^ 4003 ntohs(stcb->rport) ^ 4004 ntohs(stcb->sctp_ep->sctp_lport); 4005 #ifdef INVARIANTS 4006 net->flowidset = 1; 4007 #endif 4008 if (netp) { 4009 *netp = net; 4010 } 4011 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4012 if (net->ro.ro_rt == NULL) { 4013 /* Since we have no route put it at the back */ 4014 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4015 } else if (netfirst == NULL) { 4016 /* We are the first one in the pool. */ 4017 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4018 } else if (netfirst->ro.ro_rt == NULL) { 4019 /* 4020 * First one has NO route. Place this one ahead of the first 4021 * one. 4022 */ 4023 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4024 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4025 /* 4026 * This one has a different interface than the one at the 4027 * top of the list. Place it ahead. 4028 */ 4029 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4030 } else { 4031 /* 4032 * Ok we have the same interface as the first one. Move 4033 * forward until we find either a) one with a NULL route... 4034 * insert ahead of that b) one with a different ifp.. insert 4035 * after that. c) end of the list.. insert at the tail. 4036 */ 4037 struct sctp_nets *netlook; 4038 4039 do { 4040 netlook = TAILQ_NEXT(netfirst, sctp_next); 4041 if (netlook == NULL) { 4042 /* End of the list */ 4043 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4044 break; 4045 } else if (netlook->ro.ro_rt == NULL) { 4046 /* next one has NO route */ 4047 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4048 break; 4049 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4050 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4051 net, sctp_next); 4052 break; 4053 } 4054 /* Shift forward */ 4055 netfirst = netlook; 4056 } while (netlook != NULL); 4057 } 4058 4059 /* got to have a primary set */ 4060 if (stcb->asoc.primary_destination == 0) { 4061 stcb->asoc.primary_destination = net; 4062 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4063 (net->ro.ro_rt) && 4064 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4065 /* No route to current primary adopt new primary */ 4066 stcb->asoc.primary_destination = net; 4067 } 4068 /* Validate primary is first */ 4069 net = TAILQ_FIRST(&stcb->asoc.nets); 4070 if ((net != stcb->asoc.primary_destination) && 4071 (stcb->asoc.primary_destination)) { 4072 /* 4073 * first one on the list is NOT the primary sctp_cmpaddr() 4074 * is much more efficient if the primary is the first on the 4075 * list, make it so. 4076 */ 4077 TAILQ_REMOVE(&stcb->asoc.nets, 4078 stcb->asoc.primary_destination, sctp_next); 4079 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4080 stcb->asoc.primary_destination, sctp_next); 4081 } 4082 return (0); 4083 } 4084 4085 4086 static uint32_t 4087 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4088 { 4089 uint32_t id; 4090 struct sctpasochead *head; 4091 struct sctp_tcb *lstcb; 4092 4093 SCTP_INP_WLOCK(inp); 4094 try_again: 4095 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4096 /* TSNH */ 4097 SCTP_INP_WUNLOCK(inp); 4098 return (0); 4099 } 4100 /* 4101 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4102 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4103 */ 4104 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4105 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4106 } 4107 id = inp->sctp_associd_counter; 4108 inp->sctp_associd_counter++; 4109 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4110 if (lstcb) { 4111 goto try_again; 4112 } 4113 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4114 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4115 stcb->asoc.in_asocid_hash = 1; 4116 SCTP_INP_WUNLOCK(inp); 4117 return id; 4118 } 4119 4120 /* 4121 * allocate an association and add it to the endpoint. The caller must be 4122 * careful to add all additional addresses once they are know right away or 4123 * else the assoc will be may experience a blackout scenario. 4124 */ 4125 struct sctp_tcb * 4126 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4127 int *error, uint32_t override_tag, uint32_t vrf_id, 4128 struct thread *p 4129 ) 4130 { 4131 /* note the p argument is only valid in unbound sockets */ 4132 4133 struct sctp_tcb *stcb; 4134 struct sctp_association *asoc; 4135 struct sctpasochead *head; 4136 uint16_t rport; 4137 int err; 4138 4139 /* 4140 * Assumption made here: Caller has done a 4141 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4142 * address does not exist already. 4143 */ 4144 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4145 /* Hit max assoc, sorry no more */ 4146 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4147 *error = ENOBUFS; 4148 return (NULL); 4149 } 4150 if (firstaddr == NULL) { 4151 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4152 *error = EINVAL; 4153 return (NULL); 4154 } 4155 SCTP_INP_RLOCK(inp); 4156 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4157 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4158 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4159 /* 4160 * If its in the TCP pool, its NOT allowed to create an 4161 * association. The parent listener needs to call 4162 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4163 * off, or connected one does this.. its an error. 4164 */ 4165 SCTP_INP_RUNLOCK(inp); 4166 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4167 *error = EINVAL; 4168 return (NULL); 4169 } 4170 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4171 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4172 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4173 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4174 SCTP_INP_RUNLOCK(inp); 4175 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4176 *error = EINVAL; 4177 return (NULL); 4178 } 4179 } 4180 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4181 #ifdef SCTP_DEBUG 4182 if (firstaddr) { 4183 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4184 switch (firstaddr->sa_family) { 4185 #ifdef INET 4186 case AF_INET: 4187 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4188 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4189 break; 4190 #endif 4191 #ifdef INET6 4192 case AF_INET6: 4193 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4194 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4195 break; 4196 #endif 4197 default: 4198 break; 4199 } 4200 } else { 4201 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4202 } 4203 #endif /* SCTP_DEBUG */ 4204 switch (firstaddr->sa_family) { 4205 #ifdef INET 4206 case AF_INET: 4207 { 4208 struct sockaddr_in *sin; 4209 4210 sin = (struct sockaddr_in *)firstaddr; 4211 if ((ntohs(sin->sin_port) == 0) || 4212 (sin->sin_addr.s_addr == INADDR_ANY) || 4213 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4214 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4215 /* Invalid address */ 4216 SCTP_INP_RUNLOCK(inp); 4217 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4218 *error = EINVAL; 4219 return (NULL); 4220 } 4221 rport = sin->sin_port; 4222 break; 4223 } 4224 #endif 4225 #ifdef INET6 4226 case AF_INET6: 4227 { 4228 struct sockaddr_in6 *sin6; 4229 4230 sin6 = (struct sockaddr_in6 *)firstaddr; 4231 if ((ntohs(sin6->sin6_port) == 0) || 4232 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4233 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4234 /* Invalid address */ 4235 SCTP_INP_RUNLOCK(inp); 4236 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4237 *error = EINVAL; 4238 return (NULL); 4239 } 4240 rport = sin6->sin6_port; 4241 break; 4242 } 4243 #endif 4244 default: 4245 /* not supported family type */ 4246 SCTP_INP_RUNLOCK(inp); 4247 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4248 *error = EINVAL; 4249 return (NULL); 4250 } 4251 SCTP_INP_RUNLOCK(inp); 4252 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4253 /* 4254 * If you have not performed a bind, then we need to do the 4255 * ephemeral bind for you. 4256 */ 4257 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4258 (struct sockaddr *)NULL, 4259 (struct sctp_ifa *)NULL, 4260 p 4261 ))) { 4262 /* bind error, probably perm */ 4263 *error = err; 4264 return (NULL); 4265 } 4266 } 4267 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4268 if (stcb == NULL) { 4269 /* out of memory? */ 4270 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4271 *error = ENOMEM; 4272 return (NULL); 4273 } 4274 SCTP_INCR_ASOC_COUNT(); 4275 4276 bzero(stcb, sizeof(*stcb)); 4277 asoc = &stcb->asoc; 4278 4279 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4280 SCTP_TCB_LOCK_INIT(stcb); 4281 SCTP_TCB_SEND_LOCK_INIT(stcb); 4282 stcb->rport = rport; 4283 /* setup back pointer's */ 4284 stcb->sctp_ep = inp; 4285 stcb->sctp_socket = inp->sctp_socket; 4286 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4287 /* failed */ 4288 SCTP_TCB_LOCK_DESTROY(stcb); 4289 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4290 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4291 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4292 SCTP_DECR_ASOC_COUNT(); 4293 *error = err; 4294 return (NULL); 4295 } 4296 /* and the port */ 4297 SCTP_INP_INFO_WLOCK(); 4298 SCTP_INP_WLOCK(inp); 4299 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4300 /* inpcb freed while alloc going on */ 4301 SCTP_TCB_LOCK_DESTROY(stcb); 4302 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4303 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4304 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4305 SCTP_INP_WUNLOCK(inp); 4306 SCTP_INP_INFO_WUNLOCK(); 4307 SCTP_DECR_ASOC_COUNT(); 4308 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4309 *error = EINVAL; 4310 return (NULL); 4311 } 4312 SCTP_TCB_LOCK(stcb); 4313 4314 /* now that my_vtag is set, add it to the hash */ 4315 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4316 /* put it in the bucket in the vtag hash of assoc's for the system */ 4317 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4318 SCTP_INP_INFO_WUNLOCK(); 4319 4320 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4321 /* failure.. memory error? */ 4322 if (asoc->strmout) { 4323 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4324 asoc->strmout = NULL; 4325 } 4326 if (asoc->mapping_array) { 4327 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4328 asoc->mapping_array = NULL; 4329 } 4330 if (asoc->nr_mapping_array) { 4331 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4332 asoc->nr_mapping_array = NULL; 4333 } 4334 SCTP_DECR_ASOC_COUNT(); 4335 SCTP_TCB_UNLOCK(stcb); 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_INP_WUNLOCK(inp); 4341 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4342 *error = ENOBUFS; 4343 return (NULL); 4344 } 4345 /* Init all the timers */ 4346 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4347 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4348 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4349 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4350 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4351 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4352 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4353 4354 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4355 /* now file the port under the hash as well */ 4356 if (inp->sctp_tcbhash != NULL) { 4357 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4358 inp->sctp_hashmark)]; 4359 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4360 } 4361 SCTP_INP_WUNLOCK(inp); 4362 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4363 return (stcb); 4364 } 4365 4366 4367 void 4368 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4369 { 4370 struct sctp_association *asoc; 4371 4372 asoc = &stcb->asoc; 4373 asoc->numnets--; 4374 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4375 if (net == asoc->primary_destination) { 4376 /* Reset primary */ 4377 struct sctp_nets *lnet; 4378 4379 lnet = TAILQ_FIRST(&asoc->nets); 4380 /* 4381 * Mobility adaptation Ideally, if deleted destination is 4382 * the primary, it becomes a fast retransmission trigger by 4383 * the subsequent SET PRIMARY. (by micchie) 4384 */ 4385 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4386 SCTP_MOBILITY_BASE) || 4387 sctp_is_mobility_feature_on(stcb->sctp_ep, 4388 SCTP_MOBILITY_FASTHANDOFF)) { 4389 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4390 if (asoc->deleted_primary != NULL) { 4391 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4392 goto out; 4393 } 4394 asoc->deleted_primary = net; 4395 atomic_add_int(&net->ref_count, 1); 4396 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4397 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4398 sctp_mobility_feature_on(stcb->sctp_ep, 4399 SCTP_MOBILITY_PRIM_DELETED); 4400 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4401 stcb->sctp_ep, stcb, NULL); 4402 } 4403 out: 4404 /* Try to find a confirmed primary */ 4405 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4406 } 4407 if (net == asoc->last_data_chunk_from) { 4408 /* Reset primary */ 4409 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4410 } 4411 if (net == asoc->last_control_chunk_from) { 4412 /* Clear net */ 4413 asoc->last_control_chunk_from = NULL; 4414 } 4415 if (net == stcb->asoc.alternate) { 4416 sctp_free_remote_addr(stcb->asoc.alternate); 4417 stcb->asoc.alternate = NULL; 4418 } 4419 sctp_free_remote_addr(net); 4420 } 4421 4422 /* 4423 * remove a remote endpoint address from an association, it will fail if the 4424 * address does not exist. 4425 */ 4426 int 4427 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4428 { 4429 /* 4430 * Here we need to remove a remote address. This is quite simple, we 4431 * first find it in the list of address for the association 4432 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4433 * on that item. Note we do not allow it to be removed if there are 4434 * no other addresses. 4435 */ 4436 struct sctp_association *asoc; 4437 struct sctp_nets *net, *nnet; 4438 4439 asoc = &stcb->asoc; 4440 4441 /* locate the address */ 4442 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4443 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4444 continue; 4445 } 4446 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4447 remaddr)) { 4448 /* we found the guy */ 4449 if (asoc->numnets < 2) { 4450 /* Must have at LEAST two remote addresses */ 4451 return (-1); 4452 } else { 4453 sctp_remove_net(stcb, net); 4454 return (0); 4455 } 4456 } 4457 } 4458 /* not found. */ 4459 return (-2); 4460 } 4461 4462 void 4463 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4464 { 4465 struct sctpvtaghead *chain; 4466 struct sctp_tagblock *twait_block; 4467 int found = 0; 4468 int i; 4469 4470 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4471 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4472 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4473 if ((twait_block->vtag_block[i].v_tag == tag) && 4474 (twait_block->vtag_block[i].lport == lport) && 4475 (twait_block->vtag_block[i].rport == rport)) { 4476 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4477 twait_block->vtag_block[i].v_tag = 0; 4478 twait_block->vtag_block[i].lport = 0; 4479 twait_block->vtag_block[i].rport = 0; 4480 found = 1; 4481 break; 4482 } 4483 } 4484 if (found) 4485 break; 4486 } 4487 } 4488 4489 int 4490 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4491 { 4492 struct sctpvtaghead *chain; 4493 struct sctp_tagblock *twait_block; 4494 int found = 0; 4495 int i; 4496 4497 SCTP_INP_INFO_WLOCK(); 4498 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4499 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4500 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4501 if ((twait_block->vtag_block[i].v_tag == tag) && 4502 (twait_block->vtag_block[i].lport == lport) && 4503 (twait_block->vtag_block[i].rport == rport)) { 4504 found = 1; 4505 break; 4506 } 4507 } 4508 if (found) 4509 break; 4510 } 4511 SCTP_INP_INFO_WUNLOCK(); 4512 return (found); 4513 } 4514 4515 4516 void 4517 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4518 { 4519 struct sctpvtaghead *chain; 4520 struct sctp_tagblock *twait_block; 4521 struct timeval now; 4522 int set, i; 4523 4524 if (time == 0) { 4525 /* Its disabled */ 4526 return; 4527 } 4528 (void)SCTP_GETTIME_TIMEVAL(&now); 4529 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4530 set = 0; 4531 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4532 /* Block(s) present, lets find space, and expire on the fly */ 4533 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4534 if ((twait_block->vtag_block[i].v_tag == 0) && 4535 !set) { 4536 twait_block->vtag_block[i].tv_sec_at_expire = 4537 now.tv_sec + time; 4538 twait_block->vtag_block[i].v_tag = tag; 4539 twait_block->vtag_block[i].lport = lport; 4540 twait_block->vtag_block[i].rport = rport; 4541 set = 1; 4542 } else if ((twait_block->vtag_block[i].v_tag) && 4543 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4544 /* Audit expires this guy */ 4545 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4546 twait_block->vtag_block[i].v_tag = 0; 4547 twait_block->vtag_block[i].lport = 0; 4548 twait_block->vtag_block[i].rport = 0; 4549 if (set == 0) { 4550 /* Reuse it for my new tag */ 4551 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4552 twait_block->vtag_block[i].v_tag = tag; 4553 twait_block->vtag_block[i].lport = lport; 4554 twait_block->vtag_block[i].rport = rport; 4555 set = 1; 4556 } 4557 } 4558 } 4559 if (set) { 4560 /* 4561 * We only do up to the block where we can place our 4562 * tag for audits 4563 */ 4564 break; 4565 } 4566 } 4567 /* Need to add a new block to chain */ 4568 if (!set) { 4569 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4570 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4571 if (twait_block == NULL) { 4572 #ifdef INVARIANTS 4573 panic("Can not alloc tagblock"); 4574 #endif 4575 return; 4576 } 4577 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4578 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4579 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4580 twait_block->vtag_block[0].v_tag = tag; 4581 twait_block->vtag_block[0].lport = lport; 4582 twait_block->vtag_block[0].rport = rport; 4583 } 4584 } 4585 4586 4587 4588 /*- 4589 * Free the association after un-hashing the remote port. This 4590 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4591 * expect that the input to this function IS a locked TCB. 4592 * It will return 0, if it did NOT destroy the association (instead 4593 * it unlocks it. It will return NON-zero if it either destroyed the 4594 * association OR the association is already destroyed. 4595 */ 4596 int 4597 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4598 { 4599 int i; 4600 struct sctp_association *asoc; 4601 struct sctp_nets *net, *nnet; 4602 struct sctp_laddr *laddr, *naddr; 4603 struct sctp_tmit_chunk *chk, *nchk; 4604 struct sctp_asconf_addr *aparam, *naparam; 4605 struct sctp_asconf_ack *aack, *naack; 4606 struct sctp_stream_reset_list *strrst, *nstrrst; 4607 struct sctp_queued_to_read *sq, *nsq; 4608 struct sctp_stream_queue_pending *sp, *nsp; 4609 sctp_sharedkey_t *shared_key, *nshared_key; 4610 struct socket *so; 4611 4612 /* first, lets purge the entry from the hash table. */ 4613 4614 #ifdef SCTP_LOG_CLOSING 4615 sctp_log_closing(inp, stcb, 6); 4616 #endif 4617 if (stcb->asoc.state == 0) { 4618 #ifdef SCTP_LOG_CLOSING 4619 sctp_log_closing(inp, NULL, 7); 4620 #endif 4621 /* there is no asoc, really TSNH :-0 */ 4622 return (1); 4623 } 4624 if (stcb->asoc.alternate) { 4625 sctp_free_remote_addr(stcb->asoc.alternate); 4626 stcb->asoc.alternate = NULL; 4627 } 4628 /* TEMP CODE */ 4629 if (stcb->freed_from_where == 0) { 4630 /* Only record the first place free happened from */ 4631 stcb->freed_from_where = from_location; 4632 } 4633 /* TEMP CODE */ 4634 4635 asoc = &stcb->asoc; 4636 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4637 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4638 /* nothing around */ 4639 so = NULL; 4640 else 4641 so = inp->sctp_socket; 4642 4643 /* 4644 * We used timer based freeing if a reader or writer is in the way. 4645 * So we first check if we are actually being called from a timer, 4646 * if so we abort early if a reader or writer is still in the way. 4647 */ 4648 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4649 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4650 /* 4651 * is it the timer driving us? if so are the reader/writers 4652 * gone? 4653 */ 4654 if (stcb->asoc.refcnt) { 4655 /* nope, reader or writer in the way */ 4656 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4657 /* no asoc destroyed */ 4658 SCTP_TCB_UNLOCK(stcb); 4659 #ifdef SCTP_LOG_CLOSING 4660 sctp_log_closing(inp, stcb, 8); 4661 #endif 4662 return (0); 4663 } 4664 } 4665 /* now clean up any other timers */ 4666 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4667 asoc->dack_timer.self = NULL; 4668 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4669 /*- 4670 * For stream reset we don't blast this unless 4671 * it is a str-reset timer, it might be the 4672 * free-asoc timer which we DON'T want to 4673 * disturb. 4674 */ 4675 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4676 asoc->strreset_timer.self = NULL; 4677 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4678 asoc->asconf_timer.self = NULL; 4679 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4680 asoc->autoclose_timer.self = NULL; 4681 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4682 asoc->shut_guard_timer.self = NULL; 4683 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4684 asoc->delayed_event_timer.self = NULL; 4685 /* Mobility adaptation */ 4686 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4687 asoc->delete_prim_timer.self = NULL; 4688 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4689 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4690 net->rxt_timer.self = NULL; 4691 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4692 net->pmtu_timer.self = NULL; 4693 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4694 net->hb_timer.self = NULL; 4695 } 4696 /* Now the read queue needs to be cleaned up (only once) */ 4697 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4698 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4699 SCTP_INP_READ_LOCK(inp); 4700 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4701 if (sq->stcb == stcb) { 4702 sq->do_not_ref_stcb = 1; 4703 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4704 /* 4705 * If there is no end, there never will be 4706 * now. 4707 */ 4708 if (sq->end_added == 0) { 4709 /* Held for PD-API clear that. */ 4710 sq->pdapi_aborted = 1; 4711 sq->held_length = 0; 4712 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4713 /* 4714 * Need to add a PD-API 4715 * aborted indication. 4716 * Setting the control_pdapi 4717 * assures that it will be 4718 * added right after this 4719 * msg. 4720 */ 4721 uint32_t strseq; 4722 4723 stcb->asoc.control_pdapi = sq; 4724 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4725 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4726 stcb, 4727 SCTP_PARTIAL_DELIVERY_ABORTED, 4728 (void *)&strseq, 4729 SCTP_SO_LOCKED); 4730 stcb->asoc.control_pdapi = NULL; 4731 } 4732 } 4733 /* Add an end to wake them */ 4734 sq->end_added = 1; 4735 } 4736 } 4737 SCTP_INP_READ_UNLOCK(inp); 4738 if (stcb->block_entry) { 4739 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4740 stcb->block_entry->error = ECONNRESET; 4741 stcb->block_entry = NULL; 4742 } 4743 } 4744 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4745 /* 4746 * Someone holds a reference OR the socket is unaccepted 4747 * yet. 4748 */ 4749 if ((stcb->asoc.refcnt) || 4750 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4751 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4752 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4753 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4754 } 4755 SCTP_TCB_UNLOCK(stcb); 4756 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4757 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4758 /* nothing around */ 4759 so = NULL; 4760 if (so) { 4761 /* Wake any reader/writers */ 4762 sctp_sorwakeup(inp, so); 4763 sctp_sowwakeup(inp, so); 4764 } 4765 #ifdef SCTP_LOG_CLOSING 4766 sctp_log_closing(inp, stcb, 9); 4767 #endif 4768 /* no asoc destroyed */ 4769 return (0); 4770 } 4771 #ifdef SCTP_LOG_CLOSING 4772 sctp_log_closing(inp, stcb, 10); 4773 #endif 4774 /* 4775 * When I reach here, no others want to kill the assoc yet.. and I 4776 * own the lock. Now its possible an abort comes in when I do the 4777 * lock exchange below to grab all the locks to do the final take 4778 * out. to prevent this we increment the count, which will start a 4779 * timer and blow out above thus assuring us that we hold exclusive 4780 * killing of the asoc. Note that after getting back the TCB lock we 4781 * will go ahead and increment the counter back up and stop any 4782 * timer a passing stranger may have started :-S 4783 */ 4784 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4785 atomic_add_int(&stcb->asoc.refcnt, 1); 4786 4787 SCTP_TCB_UNLOCK(stcb); 4788 SCTP_INP_INFO_WLOCK(); 4789 SCTP_INP_WLOCK(inp); 4790 SCTP_TCB_LOCK(stcb); 4791 } 4792 /* Double check the GONE flag */ 4793 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4794 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4795 /* nothing around */ 4796 so = NULL; 4797 4798 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4799 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4800 /* 4801 * For TCP type we need special handling when we are 4802 * connected. We also include the peel'ed off ones to. 4803 */ 4804 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4805 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4806 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4807 if (so) { 4808 SOCK_LOCK(so); 4809 if (so->so_rcv.sb_cc == 0) { 4810 so->so_state &= ~(SS_ISCONNECTING | 4811 SS_ISDISCONNECTING | 4812 SS_ISCONFIRMING | 4813 SS_ISCONNECTED); 4814 } 4815 socantrcvmore_locked(so); 4816 sctp_sowwakeup(inp, so); 4817 sctp_sorwakeup(inp, so); 4818 SCTP_SOWAKEUP(so); 4819 } 4820 } 4821 } 4822 /* 4823 * Make it invalid too, that way if its about to run it will abort 4824 * and return. 4825 */ 4826 /* re-increment the lock */ 4827 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4828 atomic_add_int(&stcb->asoc.refcnt, -1); 4829 } 4830 if (stcb->asoc.refcnt) { 4831 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4832 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4833 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4834 SCTP_INP_INFO_WUNLOCK(); 4835 SCTP_INP_WUNLOCK(inp); 4836 } 4837 SCTP_TCB_UNLOCK(stcb); 4838 return (0); 4839 } 4840 asoc->state = 0; 4841 if (inp->sctp_tcbhash) { 4842 LIST_REMOVE(stcb, sctp_tcbhash); 4843 } 4844 if (stcb->asoc.in_asocid_hash) { 4845 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4846 } 4847 /* Now lets remove it from the list of ALL associations in the EP */ 4848 LIST_REMOVE(stcb, sctp_tcblist); 4849 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4850 SCTP_INP_INCR_REF(inp); 4851 SCTP_INP_WUNLOCK(inp); 4852 } 4853 /* pull from vtag hash */ 4854 LIST_REMOVE(stcb, sctp_asocs); 4855 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4856 inp->sctp_lport, stcb->rport); 4857 4858 /* 4859 * Now restop the timers to be sure this is paranoia at is finest! 4860 */ 4861 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4862 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4863 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4864 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4865 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4866 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4867 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4868 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4869 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4870 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4871 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4872 } 4873 4874 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4875 /* 4876 * The chunk lists and such SHOULD be empty but we check them just 4877 * in case. 4878 */ 4879 /* anything on the wheel needs to be removed */ 4880 for (i = 0; i < asoc->streamoutcnt; i++) { 4881 struct sctp_stream_out *outs; 4882 4883 outs = &asoc->strmout[i]; 4884 /* now clean up any chunks here */ 4885 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4886 TAILQ_REMOVE(&outs->outqueue, sp, next); 4887 sctp_free_spbufspace(stcb, asoc, sp); 4888 if (sp->data) { 4889 if (so) { 4890 /* Still an open socket - report */ 4891 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4892 0, (void *)sp, SCTP_SO_LOCKED); 4893 } 4894 if (sp->data) { 4895 sctp_m_freem(sp->data); 4896 sp->data = NULL; 4897 sp->tail_mbuf = NULL; 4898 sp->length = 0; 4899 } 4900 } 4901 if (sp->net) { 4902 sctp_free_remote_addr(sp->net); 4903 sp->net = NULL; 4904 } 4905 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4906 } 4907 } 4908 /* sa_ignore FREED_MEMORY */ 4909 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4910 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4911 SCTP_FREE(strrst, SCTP_M_STRESET); 4912 } 4913 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4914 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4915 if (sq->data) { 4916 sctp_m_freem(sq->data); 4917 sq->data = NULL; 4918 } 4919 sctp_free_remote_addr(sq->whoFrom); 4920 sq->whoFrom = NULL; 4921 sq->stcb = NULL; 4922 /* Free the ctl entry */ 4923 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4924 SCTP_DECR_READQ_COUNT(); 4925 /* sa_ignore FREED_MEMORY */ 4926 } 4927 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4928 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4929 if (chk->data) { 4930 sctp_m_freem(chk->data); 4931 chk->data = NULL; 4932 } 4933 if (chk->holds_key_ref) 4934 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4935 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4936 SCTP_DECR_CHK_COUNT(); 4937 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4938 asoc->free_chunk_cnt--; 4939 /* sa_ignore FREED_MEMORY */ 4940 } 4941 /* pending send queue SHOULD be empty */ 4942 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4943 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4944 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4945 #ifdef INVARIANTS 4946 } else { 4947 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4948 #endif 4949 } 4950 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4951 if (chk->data) { 4952 if (so) { 4953 /* Still a socket? */ 4954 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 4955 0, chk, SCTP_SO_LOCKED); 4956 } 4957 if (chk->data) { 4958 sctp_m_freem(chk->data); 4959 chk->data = NULL; 4960 } 4961 } 4962 if (chk->holds_key_ref) 4963 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4964 if (chk->whoTo) { 4965 sctp_free_remote_addr(chk->whoTo); 4966 chk->whoTo = NULL; 4967 } 4968 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4969 SCTP_DECR_CHK_COUNT(); 4970 /* sa_ignore FREED_MEMORY */ 4971 } 4972 /* sent queue SHOULD be empty */ 4973 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 4974 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 4975 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4976 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4977 #ifdef INVARIANTS 4978 } else { 4979 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4980 #endif 4981 } 4982 } 4983 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 4984 if (chk->data) { 4985 if (so) { 4986 /* Still a socket? */ 4987 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 4988 0, chk, SCTP_SO_LOCKED); 4989 } 4990 if (chk->data) { 4991 sctp_m_freem(chk->data); 4992 chk->data = NULL; 4993 } 4994 } 4995 if (chk->holds_key_ref) 4996 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4997 sctp_free_remote_addr(chk->whoTo); 4998 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4999 SCTP_DECR_CHK_COUNT(); 5000 /* sa_ignore FREED_MEMORY */ 5001 } 5002 #ifdef INVARIANTS 5003 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5004 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5005 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5006 } 5007 } 5008 #endif 5009 /* control queue MAY not be empty */ 5010 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5011 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5012 if (chk->data) { 5013 sctp_m_freem(chk->data); 5014 chk->data = NULL; 5015 } 5016 if (chk->holds_key_ref) 5017 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5018 sctp_free_remote_addr(chk->whoTo); 5019 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5020 SCTP_DECR_CHK_COUNT(); 5021 /* sa_ignore FREED_MEMORY */ 5022 } 5023 /* ASCONF queue MAY not be empty */ 5024 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5025 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5026 if (chk->data) { 5027 sctp_m_freem(chk->data); 5028 chk->data = NULL; 5029 } 5030 if (chk->holds_key_ref) 5031 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5032 sctp_free_remote_addr(chk->whoTo); 5033 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5034 SCTP_DECR_CHK_COUNT(); 5035 /* sa_ignore FREED_MEMORY */ 5036 } 5037 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5038 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5039 if (chk->data) { 5040 sctp_m_freem(chk->data); 5041 chk->data = NULL; 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 5051 if (asoc->mapping_array) { 5052 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5053 asoc->mapping_array = NULL; 5054 } 5055 if (asoc->nr_mapping_array) { 5056 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5057 asoc->nr_mapping_array = NULL; 5058 } 5059 /* the stream outs */ 5060 if (asoc->strmout) { 5061 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5062 asoc->strmout = NULL; 5063 } 5064 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5065 if (asoc->strmin) { 5066 struct sctp_queued_to_read *ctl, *nctl; 5067 5068 for (i = 0; i < asoc->streamincnt; i++) { 5069 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5070 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5071 sctp_free_remote_addr(ctl->whoFrom); 5072 if (ctl->data) { 5073 sctp_m_freem(ctl->data); 5074 ctl->data = NULL; 5075 } 5076 /* 5077 * We don't free the address here since all 5078 * the net's were freed above. 5079 */ 5080 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5081 SCTP_DECR_READQ_COUNT(); 5082 } 5083 } 5084 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5085 asoc->strmin = NULL; 5086 } 5087 asoc->streamincnt = 0; 5088 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5089 #ifdef INVARIANTS 5090 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5091 panic("no net's left alloc'ed, or list points to itself"); 5092 } 5093 #endif 5094 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5095 sctp_free_remote_addr(net); 5096 } 5097 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5098 /* sa_ignore FREED_MEMORY */ 5099 sctp_remove_laddr(laddr); 5100 } 5101 5102 /* pending asconf (address) parameters */ 5103 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5104 /* sa_ignore FREED_MEMORY */ 5105 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5106 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5107 } 5108 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5109 /* sa_ignore FREED_MEMORY */ 5110 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5111 if (aack->data != NULL) { 5112 sctp_m_freem(aack->data); 5113 } 5114 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5115 } 5116 /* clean up auth stuff */ 5117 if (asoc->local_hmacs) 5118 sctp_free_hmaclist(asoc->local_hmacs); 5119 if (asoc->peer_hmacs) 5120 sctp_free_hmaclist(asoc->peer_hmacs); 5121 5122 if (asoc->local_auth_chunks) 5123 sctp_free_chunklist(asoc->local_auth_chunks); 5124 if (asoc->peer_auth_chunks) 5125 sctp_free_chunklist(asoc->peer_auth_chunks); 5126 5127 sctp_free_authinfo(&asoc->authinfo); 5128 5129 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5130 LIST_REMOVE(shared_key, next); 5131 sctp_free_sharedkey(shared_key); 5132 /* sa_ignore FREED_MEMORY */ 5133 } 5134 5135 /* Insert new items here :> */ 5136 5137 /* Get rid of LOCK */ 5138 SCTP_TCB_UNLOCK(stcb); 5139 SCTP_TCB_LOCK_DESTROY(stcb); 5140 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5141 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5142 SCTP_INP_INFO_WUNLOCK(); 5143 SCTP_INP_RLOCK(inp); 5144 } 5145 #ifdef SCTP_TRACK_FREED_ASOCS 5146 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5147 /* now clean up the tasoc itself */ 5148 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5149 SCTP_DECR_ASOC_COUNT(); 5150 } else { 5151 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5152 } 5153 #else 5154 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5155 SCTP_DECR_ASOC_COUNT(); 5156 #endif 5157 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5158 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5159 /* 5160 * If its NOT the inp_free calling us AND sctp_close 5161 * as been called, we call back... 5162 */ 5163 SCTP_INP_RUNLOCK(inp); 5164 /* 5165 * This will start the kill timer (if we are the 5166 * last one) since we hold an increment yet. But 5167 * this is the only safe way to do this since 5168 * otherwise if the socket closes at the same time 5169 * we are here we might collide in the cleanup. 5170 */ 5171 sctp_inpcb_free(inp, 5172 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5173 SCTP_CALLED_DIRECTLY_NOCMPSET); 5174 SCTP_INP_DECR_REF(inp); 5175 goto out_of; 5176 } else { 5177 /* The socket is still open. */ 5178 SCTP_INP_DECR_REF(inp); 5179 } 5180 } 5181 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5182 SCTP_INP_RUNLOCK(inp); 5183 } 5184 out_of: 5185 /* destroyed the asoc */ 5186 #ifdef SCTP_LOG_CLOSING 5187 sctp_log_closing(inp, NULL, 11); 5188 #endif 5189 return (1); 5190 } 5191 5192 5193 5194 /* 5195 * determine if a destination is "reachable" based upon the addresses bound 5196 * to the current endpoint (e.g. only v4 or v6 currently bound) 5197 */ 5198 /* 5199 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5200 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5201 * types bound as its endpoint 5202 */ 5203 int 5204 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5205 { 5206 struct sctp_inpcb *inp; 5207 int answer; 5208 5209 /* 5210 * No locks here, the TCB, in all cases is already locked and an 5211 * assoc is up. There is either a INP lock by the caller applied (in 5212 * asconf case when deleting an address) or NOT in the HB case, 5213 * however if HB then the INP increment is up and the INP will not 5214 * be removed (on top of the fact that we have a TCB lock). So we 5215 * only want to read the sctp_flags, which is either bound-all or 5216 * not.. no protection needed since once an assoc is up you can't be 5217 * changing your binding. 5218 */ 5219 inp = stcb->sctp_ep; 5220 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5221 /* if bound all, destination is not restricted */ 5222 /* 5223 * RRS: Question during lock work: Is this correct? If you 5224 * are bound-all you still might need to obey the V4--V6 5225 * flags??? IMO this bound-all stuff needs to be removed! 5226 */ 5227 return (1); 5228 } 5229 /* NOTE: all "scope" checks are done when local addresses are added */ 5230 switch (destaddr->sa_family) { 5231 #ifdef INET6 5232 case AF_INET6: 5233 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5234 break; 5235 #endif 5236 #ifdef INET 5237 case AF_INET: 5238 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5239 break; 5240 #endif 5241 default: 5242 /* invalid family, so it's unreachable */ 5243 answer = 0; 5244 break; 5245 } 5246 return (answer); 5247 } 5248 5249 /* 5250 * update the inp_vflags on an endpoint 5251 */ 5252 static void 5253 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5254 { 5255 struct sctp_laddr *laddr; 5256 5257 /* first clear the flag */ 5258 inp->ip_inp.inp.inp_vflag = 0; 5259 /* set the flag based on addresses on the ep list */ 5260 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5261 if (laddr->ifa == NULL) { 5262 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5263 __FUNCTION__); 5264 continue; 5265 } 5266 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5267 continue; 5268 } 5269 switch (laddr->ifa->address.sa.sa_family) { 5270 #ifdef INET6 5271 case AF_INET6: 5272 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5273 break; 5274 #endif 5275 #ifdef INET 5276 case AF_INET: 5277 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5278 break; 5279 #endif 5280 default: 5281 break; 5282 } 5283 } 5284 } 5285 5286 /* 5287 * Add the address to the endpoint local address list There is nothing to be 5288 * done if we are bound to all addresses 5289 */ 5290 void 5291 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5292 { 5293 struct sctp_laddr *laddr; 5294 int fnd, error = 0; 5295 5296 fnd = 0; 5297 5298 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5299 /* You are already bound to all. You have it already */ 5300 return; 5301 } 5302 #ifdef INET6 5303 if (ifa->address.sa.sa_family == AF_INET6) { 5304 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5305 /* Can't bind a non-useable addr. */ 5306 return; 5307 } 5308 } 5309 #endif 5310 /* first, is it already present? */ 5311 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5312 if (laddr->ifa == ifa) { 5313 fnd = 1; 5314 break; 5315 } 5316 } 5317 5318 if (fnd == 0) { 5319 /* Not in the ep list */ 5320 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5321 if (error != 0) 5322 return; 5323 inp->laddr_count++; 5324 /* update inp_vflag flags */ 5325 switch (ifa->address.sa.sa_family) { 5326 #ifdef INET6 5327 case AF_INET6: 5328 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5329 break; 5330 #endif 5331 #ifdef INET 5332 case AF_INET: 5333 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5334 break; 5335 #endif 5336 default: 5337 break; 5338 } 5339 } 5340 return; 5341 } 5342 5343 5344 /* 5345 * select a new (hopefully reachable) destination net (should only be used 5346 * when we deleted an ep addr that is the only usable source address to reach 5347 * the destination net) 5348 */ 5349 static void 5350 sctp_select_primary_destination(struct sctp_tcb *stcb) 5351 { 5352 struct sctp_nets *net; 5353 5354 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5355 /* for now, we'll just pick the first reachable one we find */ 5356 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5357 continue; 5358 if (sctp_destination_is_reachable(stcb, 5359 (struct sockaddr *)&net->ro._l_addr)) { 5360 /* found a reachable destination */ 5361 stcb->asoc.primary_destination = net; 5362 } 5363 } 5364 /* I can't there from here! ...we're gonna die shortly... */ 5365 } 5366 5367 5368 /* 5369 * Delete the address from the endpoint local address list There is nothing 5370 * to be done if we are bound to all addresses 5371 */ 5372 void 5373 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5374 { 5375 struct sctp_laddr *laddr; 5376 int fnd; 5377 5378 fnd = 0; 5379 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5380 /* You are already bound to all. You have it already */ 5381 return; 5382 } 5383 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5384 if (laddr->ifa == ifa) { 5385 fnd = 1; 5386 break; 5387 } 5388 } 5389 if (fnd && (inp->laddr_count < 2)) { 5390 /* can't delete unless there are at LEAST 2 addresses */ 5391 return; 5392 } 5393 if (fnd) { 5394 /* 5395 * clean up any use of this address go through our 5396 * associations and clear any last_used_address that match 5397 * this one for each assoc, see if a new primary_destination 5398 * is needed 5399 */ 5400 struct sctp_tcb *stcb; 5401 5402 /* clean up "next_addr_touse" */ 5403 if (inp->next_addr_touse == laddr) 5404 /* delete this address */ 5405 inp->next_addr_touse = NULL; 5406 5407 /* clean up "last_used_address" */ 5408 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5409 struct sctp_nets *net; 5410 5411 SCTP_TCB_LOCK(stcb); 5412 if (stcb->asoc.last_used_address == laddr) 5413 /* delete this address */ 5414 stcb->asoc.last_used_address = NULL; 5415 /* 5416 * Now spin through all the nets and purge any ref 5417 * to laddr 5418 */ 5419 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5420 if (net->ro._s_addr && 5421 (net->ro._s_addr->ifa == laddr->ifa)) { 5422 /* Yep, purge src address selected */ 5423 sctp_rtentry_t *rt; 5424 5425 /* delete this address if cached */ 5426 rt = net->ro.ro_rt; 5427 if (rt != NULL) { 5428 RTFREE(rt); 5429 net->ro.ro_rt = NULL; 5430 } 5431 sctp_free_ifa(net->ro._s_addr); 5432 net->ro._s_addr = NULL; 5433 net->src_addr_selected = 0; 5434 } 5435 } 5436 SCTP_TCB_UNLOCK(stcb); 5437 } /* for each tcb */ 5438 /* remove it from the ep list */ 5439 sctp_remove_laddr(laddr); 5440 inp->laddr_count--; 5441 /* update inp_vflag flags */ 5442 sctp_update_ep_vflag(inp); 5443 } 5444 return; 5445 } 5446 5447 /* 5448 * Add the address to the TCB local address restricted list. 5449 * This is a "pending" address list (eg. addresses waiting for an 5450 * ASCONF-ACK response) and cannot be used as a valid source address. 5451 */ 5452 void 5453 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5454 { 5455 struct sctp_laddr *laddr; 5456 struct sctpladdr *list; 5457 5458 /* 5459 * Assumes TCB is locked.. and possibly the INP. May need to 5460 * confirm/fix that if we need it and is not the case. 5461 */ 5462 list = &stcb->asoc.sctp_restricted_addrs; 5463 5464 #ifdef INET6 5465 if (ifa->address.sa.sa_family == AF_INET6) { 5466 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5467 /* Can't bind a non-existent addr. */ 5468 return; 5469 } 5470 } 5471 #endif 5472 /* does the address already exist? */ 5473 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5474 if (laddr->ifa == ifa) { 5475 return; 5476 } 5477 } 5478 5479 /* add to the list */ 5480 (void)sctp_insert_laddr(list, ifa, 0); 5481 return; 5482 } 5483 5484 /* 5485 * insert an laddr entry with the given ifa for the desired list 5486 */ 5487 int 5488 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5489 { 5490 struct sctp_laddr *laddr; 5491 5492 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5493 if (laddr == NULL) { 5494 /* out of memory? */ 5495 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5496 return (EINVAL); 5497 } 5498 SCTP_INCR_LADDR_COUNT(); 5499 bzero(laddr, sizeof(*laddr)); 5500 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5501 laddr->ifa = ifa; 5502 laddr->action = act; 5503 atomic_add_int(&ifa->refcount, 1); 5504 /* insert it */ 5505 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5506 5507 return (0); 5508 } 5509 5510 /* 5511 * Remove an laddr entry from the local address list (on an assoc) 5512 */ 5513 void 5514 sctp_remove_laddr(struct sctp_laddr *laddr) 5515 { 5516 5517 /* remove from the list */ 5518 LIST_REMOVE(laddr, sctp_nxt_addr); 5519 sctp_free_ifa(laddr->ifa); 5520 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5521 SCTP_DECR_LADDR_COUNT(); 5522 } 5523 5524 /* 5525 * Remove a local address from the TCB local address restricted list 5526 */ 5527 void 5528 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5529 { 5530 struct sctp_inpcb *inp; 5531 struct sctp_laddr *laddr; 5532 5533 /* 5534 * This is called by asconf work. It is assumed that a) The TCB is 5535 * locked and b) The INP is locked. This is true in as much as I can 5536 * trace through the entry asconf code where I did these locks. 5537 * Again, the ASCONF code is a bit different in that it does lock 5538 * the INP during its work often times. This must be since we don't 5539 * want other proc's looking up things while what they are looking 5540 * up is changing :-D 5541 */ 5542 5543 inp = stcb->sctp_ep; 5544 /* if subset bound and don't allow ASCONF's, can't delete last */ 5545 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5546 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5547 if (stcb->sctp_ep->laddr_count < 2) { 5548 /* can't delete last address */ 5549 return; 5550 } 5551 } 5552 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5553 /* remove the address if it exists */ 5554 if (laddr->ifa == NULL) 5555 continue; 5556 if (laddr->ifa == ifa) { 5557 sctp_remove_laddr(laddr); 5558 return; 5559 } 5560 } 5561 5562 /* address not found! */ 5563 return; 5564 } 5565 5566 /* 5567 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5568 */ 5569 /* sysctl */ 5570 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5571 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5572 5573 5574 5575 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5576 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5577 int *sctp_cpuarry = NULL; 5578 void 5579 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5580 { 5581 /* Queue a packet to a processor for the specified core */ 5582 struct sctp_mcore_queue *qent; 5583 struct sctp_mcore_ctrl *wkq; 5584 int need_wake = 0; 5585 5586 if (sctp_mcore_workers == NULL) { 5587 /* Something went way bad during setup */ 5588 sctp_input_with_port(m, off, 0); 5589 return; 5590 } 5591 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5592 (sizeof(struct sctp_mcore_queue)), 5593 SCTP_M_MCORE); 5594 if (qent == NULL) { 5595 /* This is trouble */ 5596 sctp_input_with_port(m, off, 0); 5597 return; 5598 } 5599 qent->vn = curvnet; 5600 qent->m = m; 5601 qent->off = off; 5602 qent->v6 = 0; 5603 wkq = &sctp_mcore_workers[cpu_to_use]; 5604 SCTP_MCORE_QLOCK(wkq); 5605 5606 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5607 if (wkq->running == 0) { 5608 need_wake = 1; 5609 } 5610 SCTP_MCORE_QUNLOCK(wkq); 5611 if (need_wake) { 5612 wakeup(&wkq->running); 5613 } 5614 } 5615 5616 static void 5617 sctp_mcore_thread(void *arg) 5618 { 5619 5620 struct sctp_mcore_ctrl *wkq; 5621 struct sctp_mcore_queue *qent; 5622 5623 wkq = (struct sctp_mcore_ctrl *)arg; 5624 struct mbuf *m; 5625 int off, v6; 5626 5627 /* Wait for first tickle */ 5628 SCTP_MCORE_LOCK(wkq); 5629 wkq->running = 0; 5630 msleep(&wkq->running, 5631 &wkq->core_mtx, 5632 0, "wait for pkt", 0); 5633 SCTP_MCORE_UNLOCK(wkq); 5634 5635 /* Bind to our cpu */ 5636 thread_lock(curthread); 5637 sched_bind(curthread, wkq->cpuid); 5638 thread_unlock(curthread); 5639 5640 /* Now lets start working */ 5641 SCTP_MCORE_LOCK(wkq); 5642 /* Now grab lock and go */ 5643 for (;;) { 5644 SCTP_MCORE_QLOCK(wkq); 5645 skip_sleep: 5646 wkq->running = 1; 5647 qent = TAILQ_FIRST(&wkq->que); 5648 if (qent) { 5649 TAILQ_REMOVE(&wkq->que, qent, next); 5650 SCTP_MCORE_QUNLOCK(wkq); 5651 CURVNET_SET(qent->vn); 5652 m = qent->m; 5653 off = qent->off; 5654 v6 = qent->v6; 5655 SCTP_FREE(qent, SCTP_M_MCORE); 5656 if (v6 == 0) { 5657 sctp_input_with_port(m, off, 0); 5658 } else { 5659 SCTP_PRINTF("V6 not yet supported\n"); 5660 sctp_m_freem(m); 5661 } 5662 CURVNET_RESTORE(); 5663 SCTP_MCORE_QLOCK(wkq); 5664 } 5665 wkq->running = 0; 5666 if (!TAILQ_EMPTY(&wkq->que)) { 5667 goto skip_sleep; 5668 } 5669 SCTP_MCORE_QUNLOCK(wkq); 5670 msleep(&wkq->running, 5671 &wkq->core_mtx, 5672 0, "wait for pkt", 0); 5673 } 5674 } 5675 5676 static void 5677 sctp_startup_mcore_threads(void) 5678 { 5679 int i, cpu; 5680 5681 if (mp_ncpus == 1) 5682 return; 5683 5684 if (sctp_mcore_workers != NULL) { 5685 /* 5686 * Already been here in some previous vnet? 5687 */ 5688 return; 5689 } 5690 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5691 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5692 SCTP_M_MCORE); 5693 if (sctp_mcore_workers == NULL) { 5694 /* TSNH I hope */ 5695 return; 5696 } 5697 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5698 sizeof(struct sctp_mcore_ctrl))); 5699 /* Init the structures */ 5700 for (i = 0; i <= mp_maxid; i++) { 5701 TAILQ_INIT(&sctp_mcore_workers[i].que); 5702 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5703 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5704 sctp_mcore_workers[i].cpuid = i; 5705 } 5706 if (sctp_cpuarry == NULL) { 5707 SCTP_MALLOC(sctp_cpuarry, int *, 5708 (mp_ncpus * sizeof(int)), 5709 SCTP_M_MCORE); 5710 i = 0; 5711 CPU_FOREACH(cpu) { 5712 sctp_cpuarry[i] = cpu; 5713 i++; 5714 } 5715 } 5716 /* Now start them all */ 5717 CPU_FOREACH(cpu) { 5718 (void)kproc_create(sctp_mcore_thread, 5719 (void *)&sctp_mcore_workers[cpu], 5720 &sctp_mcore_workers[cpu].thread_proc, 5721 RFPROC, 5722 SCTP_KTHREAD_PAGES, 5723 SCTP_MCORE_NAME); 5724 5725 } 5726 } 5727 5728 #endif 5729 5730 void 5731 sctp_pcb_init() 5732 { 5733 /* 5734 * SCTP initialization for the PCB structures should be called by 5735 * the sctp_init() funciton. 5736 */ 5737 int i; 5738 struct timeval tv; 5739 5740 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5741 /* error I was called twice */ 5742 return; 5743 } 5744 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5745 5746 #if defined(SCTP_LOCAL_TRACE_BUF) 5747 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5748 #endif 5749 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5750 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5751 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5752 SCTP_M_MCORE); 5753 #endif 5754 (void)SCTP_GETTIME_TIMEVAL(&tv); 5755 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5756 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5757 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5758 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5759 #else 5760 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5761 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5762 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5763 #endif 5764 /* init the empty list of (All) Endpoints */ 5765 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5766 5767 5768 /* init the hash table of endpoints */ 5769 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5770 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5771 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5772 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5773 &SCTP_BASE_INFO(hashasocmark)); 5774 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5775 &SCTP_BASE_INFO(hashmark)); 5776 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5777 &SCTP_BASE_INFO(hashtcpmark)); 5778 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5779 5780 5781 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5782 &SCTP_BASE_INFO(hashvrfmark)); 5783 5784 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5785 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5786 /* init the zones */ 5787 /* 5788 * FIX ME: Should check for NULL returns, but if it does fail we are 5789 * doomed to panic anyways... add later maybe. 5790 */ 5791 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5792 sizeof(struct sctp_inpcb), maxsockets); 5793 5794 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5795 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5796 5797 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5798 sizeof(struct sctp_laddr), 5799 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5800 5801 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5802 sizeof(struct sctp_nets), 5803 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5804 5805 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5806 sizeof(struct sctp_tmit_chunk), 5807 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5808 5809 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5810 sizeof(struct sctp_queued_to_read), 5811 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5812 5813 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5814 sizeof(struct sctp_stream_queue_pending), 5815 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5816 5817 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5818 sizeof(struct sctp_asconf), 5819 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5820 5821 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5822 sizeof(struct sctp_asconf_ack), 5823 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5824 5825 5826 /* Master Lock INIT for info structure */ 5827 SCTP_INP_INFO_LOCK_INIT(); 5828 SCTP_STATLOG_INIT_LOCK(); 5829 5830 SCTP_IPI_COUNT_INIT(); 5831 SCTP_IPI_ADDR_INIT(); 5832 #ifdef SCTP_PACKET_LOGGING 5833 SCTP_IP_PKTLOG_INIT(); 5834 #endif 5835 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5836 5837 SCTP_WQ_ADDR_INIT(); 5838 /* not sure if we need all the counts */ 5839 SCTP_BASE_INFO(ipi_count_ep) = 0; 5840 /* assoc/tcb zone info */ 5841 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5842 /* local addrlist zone info */ 5843 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5844 /* remote addrlist zone info */ 5845 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5846 /* chunk info */ 5847 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5848 5849 /* socket queue zone info */ 5850 SCTP_BASE_INFO(ipi_count_readq) = 0; 5851 5852 /* stream out queue cont */ 5853 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5854 5855 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5856 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5857 5858 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5859 5860 /* Init the TIMEWAIT list */ 5861 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5862 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5863 } 5864 5865 sctp_startup_iterator(); 5866 5867 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5868 sctp_startup_mcore_threads(); 5869 #endif 5870 5871 /* 5872 * INIT the default VRF which for BSD is the only one, other O/S's 5873 * may have more. But initially they must start with one and then 5874 * add the VRF's as addresses are added. 5875 */ 5876 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5877 } 5878 5879 /* 5880 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5881 */ 5882 void 5883 sctp_pcb_finish(void) 5884 { 5885 struct sctp_vrflist *vrf_bucket; 5886 struct sctp_vrf *vrf, *nvrf; 5887 struct sctp_ifn *ifn, *nifn; 5888 struct sctp_ifa *ifa, *nifa; 5889 struct sctpvtaghead *chain; 5890 struct sctp_tagblock *twait_block, *prev_twait_block; 5891 struct sctp_laddr *wi, *nwi; 5892 int i; 5893 5894 /* 5895 * Free BSD the it thread never exits but we do clean up. The only 5896 * way freebsd reaches here if we have VRF's but we still add the 5897 * ifdef to make it compile on old versions. 5898 */ 5899 { 5900 struct sctp_iterator *it, *nit; 5901 5902 SCTP_IPI_ITERATOR_WQ_LOCK(); 5903 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5904 if (it->vn != curvnet) { 5905 continue; 5906 } 5907 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5908 if (it->function_atend != NULL) { 5909 (*it->function_atend) (it->pointer, it->val); 5910 } 5911 SCTP_FREE(it, SCTP_M_ITER); 5912 } 5913 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5914 SCTP_ITERATOR_LOCK(); 5915 if ((sctp_it_ctl.cur_it) && 5916 (sctp_it_ctl.cur_it->vn == curvnet)) { 5917 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5918 } 5919 SCTP_ITERATOR_UNLOCK(); 5920 } 5921 5922 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5923 SCTP_WQ_ADDR_LOCK(); 5924 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5925 LIST_REMOVE(wi, sctp_nxt_addr); 5926 SCTP_DECR_LADDR_COUNT(); 5927 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5928 } 5929 SCTP_WQ_ADDR_UNLOCK(); 5930 5931 /* 5932 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5933 * destroyed first). 5934 */ 5935 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5936 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5937 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5938 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5939 /* free the ifa */ 5940 LIST_REMOVE(ifa, next_bucket); 5941 LIST_REMOVE(ifa, next_ifa); 5942 SCTP_FREE(ifa, SCTP_M_IFA); 5943 } 5944 /* free the ifn */ 5945 LIST_REMOVE(ifn, next_bucket); 5946 LIST_REMOVE(ifn, next_ifn); 5947 SCTP_FREE(ifn, SCTP_M_IFN); 5948 } 5949 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5950 /* free the vrf */ 5951 LIST_REMOVE(vrf, next_vrf); 5952 SCTP_FREE(vrf, SCTP_M_VRF); 5953 } 5954 /* free the vrf hashes */ 5955 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5956 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 5957 5958 /* 5959 * free the TIMEWAIT list elements malloc'd in the function 5960 * sctp_add_vtag_to_timewait()... 5961 */ 5962 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5963 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 5964 if (!LIST_EMPTY(chain)) { 5965 prev_twait_block = NULL; 5966 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 5967 if (prev_twait_block) { 5968 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5969 } 5970 prev_twait_block = twait_block; 5971 } 5972 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 5973 } 5974 } 5975 5976 /* free the locks and mutexes */ 5977 #ifdef SCTP_PACKET_LOGGING 5978 SCTP_IP_PKTLOG_DESTROY(); 5979 #endif 5980 SCTP_IPI_ADDR_DESTROY(); 5981 SCTP_STATLOG_DESTROY(); 5982 SCTP_INP_INFO_LOCK_DESTROY(); 5983 5984 SCTP_WQ_ADDR_DESTROY(); 5985 5986 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 5987 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 5988 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 5989 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 5990 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 5991 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 5992 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 5993 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 5994 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 5995 /* Get rid of other stuff to */ 5996 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 5997 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 5998 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 5999 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6000 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6001 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6002 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6003 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6004 #endif 6005 } 6006 6007 6008 int 6009 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6010 int offset, int limit, 6011 struct sockaddr *src, struct sockaddr *dst, 6012 struct sockaddr *altsa) 6013 { 6014 /* 6015 * grub through the INIT pulling addresses and loading them to the 6016 * nets structure in the asoc. The from address in the mbuf should 6017 * also be loaded (if it is not already). This routine can be called 6018 * with either INIT or INIT-ACK's as long as the m points to the IP 6019 * packet and the offset points to the beginning of the parameters. 6020 */ 6021 struct sctp_inpcb *inp; 6022 struct sctp_nets *net, *nnet, *net_tmp; 6023 struct sctp_paramhdr *phdr, parm_buf; 6024 struct sctp_tcb *stcb_tmp; 6025 uint16_t ptype, plen; 6026 struct sockaddr *sa; 6027 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6028 struct sctp_auth_random *p_random = NULL; 6029 uint16_t random_len = 0; 6030 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6031 struct sctp_auth_hmac_algo *hmacs = NULL; 6032 uint16_t hmacs_len = 0; 6033 uint8_t saw_asconf = 0; 6034 uint8_t saw_asconf_ack = 0; 6035 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6036 struct sctp_auth_chunk_list *chunks = NULL; 6037 uint16_t num_chunks = 0; 6038 sctp_key_t *new_key; 6039 uint32_t keylen; 6040 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6041 uint8_t ecn_allowed; 6042 6043 #ifdef INET 6044 struct sockaddr_in sin; 6045 6046 #endif 6047 #ifdef INET6 6048 struct sockaddr_in6 sin6; 6049 6050 #endif 6051 6052 /* First get the destination address setup too. */ 6053 #ifdef INET 6054 memset(&sin, 0, sizeof(sin)); 6055 sin.sin_family = AF_INET; 6056 sin.sin_len = sizeof(sin); 6057 sin.sin_port = stcb->rport; 6058 #endif 6059 #ifdef INET6 6060 memset(&sin6, 0, sizeof(sin6)); 6061 sin6.sin6_family = AF_INET6; 6062 sin6.sin6_len = sizeof(struct sockaddr_in6); 6063 sin6.sin6_port = stcb->rport; 6064 #endif 6065 if (altsa) { 6066 sa = altsa; 6067 } else { 6068 sa = src; 6069 } 6070 /* Turn off ECN until we get through all params */ 6071 ecn_allowed = 0; 6072 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6073 /* mark all addresses that we have currently on the list */ 6074 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6075 } 6076 /* does the source address already exist? if so skip it */ 6077 inp = stcb->sctp_ep; 6078 atomic_add_int(&stcb->asoc.refcnt, 1); 6079 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6080 atomic_add_int(&stcb->asoc.refcnt, -1); 6081 6082 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6083 /* we must add the source address */ 6084 /* no scope set here since we have a tcb already. */ 6085 switch (sa->sa_family) { 6086 #ifdef INET 6087 case AF_INET: 6088 if (stcb->asoc.scope.ipv4_addr_legal) { 6089 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6090 return (-1); 6091 } 6092 } 6093 break; 6094 #endif 6095 #ifdef INET6 6096 case AF_INET6: 6097 if (stcb->asoc.scope.ipv6_addr_legal) { 6098 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6099 return (-2); 6100 } 6101 } 6102 break; 6103 #endif 6104 default: 6105 break; 6106 } 6107 } else { 6108 if (net_tmp != NULL && stcb_tmp == stcb) { 6109 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6110 } else if (stcb_tmp != stcb) { 6111 /* It belongs to another association? */ 6112 if (stcb_tmp) 6113 SCTP_TCB_UNLOCK(stcb_tmp); 6114 return (-3); 6115 } 6116 } 6117 if (stcb->asoc.state == 0) { 6118 /* the assoc was freed? */ 6119 return (-4); 6120 } 6121 /* 6122 * peer must explicitly turn this on. This may have been initialized 6123 * to be "on" in order to allow local addr changes while INIT's are 6124 * in flight. 6125 */ 6126 stcb->asoc.peer_supports_asconf = 0; 6127 /* now we must go through each of the params. */ 6128 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6129 while (phdr) { 6130 ptype = ntohs(phdr->param_type); 6131 plen = ntohs(phdr->param_length); 6132 /* 6133 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6134 * (uint32_t)ptype, (int)plen); 6135 */ 6136 if (offset + plen > limit) { 6137 break; 6138 } 6139 if (plen == 0) { 6140 break; 6141 } 6142 #ifdef INET 6143 if (ptype == SCTP_IPV4_ADDRESS) { 6144 if (stcb->asoc.scope.ipv4_addr_legal) { 6145 struct sctp_ipv4addr_param *p4, p4_buf; 6146 6147 /* ok get the v4 address and check/add */ 6148 phdr = sctp_get_next_param(m, offset, 6149 (struct sctp_paramhdr *)&p4_buf, 6150 sizeof(p4_buf)); 6151 if (plen != sizeof(struct sctp_ipv4addr_param) || 6152 phdr == NULL) { 6153 return (-5); 6154 } 6155 p4 = (struct sctp_ipv4addr_param *)phdr; 6156 sin.sin_addr.s_addr = p4->addr; 6157 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6158 /* Skip multi-cast addresses */ 6159 goto next_param; 6160 } 6161 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6162 (sin.sin_addr.s_addr == INADDR_ANY)) { 6163 goto next_param; 6164 } 6165 sa = (struct sockaddr *)&sin; 6166 inp = stcb->sctp_ep; 6167 atomic_add_int(&stcb->asoc.refcnt, 1); 6168 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6169 dst, stcb); 6170 atomic_add_int(&stcb->asoc.refcnt, -1); 6171 6172 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6173 inp == NULL) { 6174 /* we must add the source address */ 6175 /* 6176 * no scope set since we have a tcb 6177 * already 6178 */ 6179 6180 /* 6181 * we must validate the state again 6182 * here 6183 */ 6184 add_it_now: 6185 if (stcb->asoc.state == 0) { 6186 /* the assoc was freed? */ 6187 return (-7); 6188 } 6189 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6190 return (-8); 6191 } 6192 } else if (stcb_tmp == stcb) { 6193 if (stcb->asoc.state == 0) { 6194 /* the assoc was freed? */ 6195 return (-10); 6196 } 6197 if (net != NULL) { 6198 /* clear flag */ 6199 net->dest_state &= 6200 ~SCTP_ADDR_NOT_IN_ASSOC; 6201 } 6202 } else { 6203 /* 6204 * strange, address is in another 6205 * assoc? straighten out locks. 6206 */ 6207 if (stcb_tmp) { 6208 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6209 /* 6210 * in setup state we 6211 * abort this guy 6212 */ 6213 sctp_abort_an_association(stcb_tmp->sctp_ep, 6214 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6215 goto add_it_now; 6216 } 6217 SCTP_TCB_UNLOCK(stcb_tmp); 6218 } 6219 if (stcb->asoc.state == 0) { 6220 /* the assoc was freed? */ 6221 return (-12); 6222 } 6223 return (-13); 6224 } 6225 } 6226 } else 6227 #endif 6228 #ifdef INET6 6229 if (ptype == SCTP_IPV6_ADDRESS) { 6230 if (stcb->asoc.scope.ipv6_addr_legal) { 6231 /* ok get the v6 address and check/add */ 6232 struct sctp_ipv6addr_param *p6, p6_buf; 6233 6234 phdr = sctp_get_next_param(m, offset, 6235 (struct sctp_paramhdr *)&p6_buf, 6236 sizeof(p6_buf)); 6237 if (plen != sizeof(struct sctp_ipv6addr_param) || 6238 phdr == NULL) { 6239 return (-14); 6240 } 6241 p6 = (struct sctp_ipv6addr_param *)phdr; 6242 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6243 sizeof(p6->addr)); 6244 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6245 /* Skip multi-cast addresses */ 6246 goto next_param; 6247 } 6248 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6249 /* 6250 * Link local make no sense without 6251 * scope 6252 */ 6253 goto next_param; 6254 } 6255 sa = (struct sockaddr *)&sin6; 6256 inp = stcb->sctp_ep; 6257 atomic_add_int(&stcb->asoc.refcnt, 1); 6258 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6259 dst, stcb); 6260 atomic_add_int(&stcb->asoc.refcnt, -1); 6261 if (stcb_tmp == NULL && 6262 (inp == stcb->sctp_ep || inp == NULL)) { 6263 /* 6264 * we must validate the state again 6265 * here 6266 */ 6267 add_it_now6: 6268 if (stcb->asoc.state == 0) { 6269 /* the assoc was freed? */ 6270 return (-16); 6271 } 6272 /* 6273 * we must add the address, no scope 6274 * set 6275 */ 6276 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6277 return (-17); 6278 } 6279 } else if (stcb_tmp == stcb) { 6280 /* 6281 * we must validate the state again 6282 * here 6283 */ 6284 if (stcb->asoc.state == 0) { 6285 /* the assoc was freed? */ 6286 return (-19); 6287 } 6288 if (net != NULL) { 6289 /* clear flag */ 6290 net->dest_state &= 6291 ~SCTP_ADDR_NOT_IN_ASSOC; 6292 } 6293 } else { 6294 /* 6295 * strange, address is in another 6296 * assoc? straighten out locks. 6297 */ 6298 if (stcb_tmp) 6299 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6300 /* 6301 * in setup state we 6302 * abort this guy 6303 */ 6304 sctp_abort_an_association(stcb_tmp->sctp_ep, 6305 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6306 goto add_it_now6; 6307 } 6308 SCTP_TCB_UNLOCK(stcb_tmp); 6309 6310 if (stcb->asoc.state == 0) { 6311 /* the assoc was freed? */ 6312 return (-21); 6313 } 6314 return (-22); 6315 } 6316 } 6317 } else 6318 #endif 6319 if (ptype == SCTP_ECN_CAPABLE) { 6320 ecn_allowed = 1; 6321 } else if (ptype == SCTP_ULP_ADAPTATION) { 6322 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6323 struct sctp_adaptation_layer_indication ai, 6324 *aip; 6325 6326 phdr = sctp_get_next_param(m, offset, 6327 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6328 aip = (struct sctp_adaptation_layer_indication *)phdr; 6329 if (aip) { 6330 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6331 stcb->asoc.adaptation_needed = 1; 6332 } 6333 } 6334 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6335 struct sctp_asconf_addr_param lstore, *fee; 6336 int lptype; 6337 struct sockaddr *lsa = NULL; 6338 6339 #ifdef INET 6340 struct sctp_asconf_addrv4_param *fii; 6341 6342 #endif 6343 6344 stcb->asoc.peer_supports_asconf = 1; 6345 if (plen > sizeof(lstore)) { 6346 return (-23); 6347 } 6348 phdr = sctp_get_next_param(m, offset, 6349 (struct sctp_paramhdr *)&lstore, 6350 min(plen, sizeof(lstore))); 6351 if (phdr == NULL) { 6352 return (-24); 6353 } 6354 fee = (struct sctp_asconf_addr_param *)phdr; 6355 lptype = ntohs(fee->addrp.ph.param_type); 6356 switch (lptype) { 6357 #ifdef INET 6358 case SCTP_IPV4_ADDRESS: 6359 if (plen != 6360 sizeof(struct sctp_asconf_addrv4_param)) { 6361 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6362 (int)sizeof(struct sctp_asconf_addrv4_param), 6363 plen); 6364 } else { 6365 fii = (struct sctp_asconf_addrv4_param *)fee; 6366 sin.sin_addr.s_addr = fii->addrp.addr; 6367 lsa = (struct sockaddr *)&sin; 6368 } 6369 break; 6370 #endif 6371 #ifdef INET6 6372 case SCTP_IPV6_ADDRESS: 6373 if (plen != 6374 sizeof(struct sctp_asconf_addr_param)) { 6375 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6376 (int)sizeof(struct sctp_asconf_addr_param), 6377 plen); 6378 } else { 6379 memcpy(sin6.sin6_addr.s6_addr, 6380 fee->addrp.addr, 6381 sizeof(fee->addrp.addr)); 6382 lsa = (struct sockaddr *)&sin6; 6383 } 6384 break; 6385 #endif 6386 default: 6387 break; 6388 } 6389 if (lsa) { 6390 (void)sctp_set_primary_addr(stcb, sa, NULL); 6391 } 6392 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6393 stcb->asoc.peer_supports_nat = 1; 6394 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6395 /* Peer supports pr-sctp */ 6396 stcb->asoc.peer_supports_prsctp = 1; 6397 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6398 /* A supported extension chunk */ 6399 struct sctp_supported_chunk_types_param *pr_supported; 6400 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6401 int num_ent, i; 6402 6403 phdr = sctp_get_next_param(m, offset, 6404 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6405 if (phdr == NULL) { 6406 return (-25); 6407 } 6408 stcb->asoc.peer_supports_asconf = 0; 6409 stcb->asoc.peer_supports_prsctp = 0; 6410 stcb->asoc.peer_supports_pktdrop = 0; 6411 stcb->asoc.peer_supports_strreset = 0; 6412 stcb->asoc.peer_supports_nr_sack = 0; 6413 stcb->asoc.peer_supports_auth = 0; 6414 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6415 num_ent = plen - sizeof(struct sctp_paramhdr); 6416 for (i = 0; i < num_ent; i++) { 6417 switch (pr_supported->chunk_types[i]) { 6418 case SCTP_ASCONF: 6419 case SCTP_ASCONF_ACK: 6420 stcb->asoc.peer_supports_asconf = 1; 6421 break; 6422 case SCTP_FORWARD_CUM_TSN: 6423 stcb->asoc.peer_supports_prsctp = 1; 6424 break; 6425 case SCTP_PACKET_DROPPED: 6426 stcb->asoc.peer_supports_pktdrop = 1; 6427 break; 6428 case SCTP_NR_SELECTIVE_ACK: 6429 stcb->asoc.peer_supports_nr_sack = 1; 6430 break; 6431 case SCTP_STREAM_RESET: 6432 stcb->asoc.peer_supports_strreset = 1; 6433 break; 6434 case SCTP_AUTHENTICATION: 6435 stcb->asoc.peer_supports_auth = 1; 6436 break; 6437 default: 6438 /* one I have not learned yet */ 6439 break; 6440 6441 } 6442 } 6443 } else if (ptype == SCTP_RANDOM) { 6444 if (plen > sizeof(random_store)) 6445 break; 6446 if (got_random) { 6447 /* already processed a RANDOM */ 6448 goto next_param; 6449 } 6450 phdr = sctp_get_next_param(m, offset, 6451 (struct sctp_paramhdr *)random_store, 6452 min(sizeof(random_store), plen)); 6453 if (phdr == NULL) 6454 return (-26); 6455 p_random = (struct sctp_auth_random *)phdr; 6456 random_len = plen - sizeof(*p_random); 6457 /* enforce the random length */ 6458 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6459 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6460 return (-27); 6461 } 6462 got_random = 1; 6463 } else if (ptype == SCTP_HMAC_LIST) { 6464 int num_hmacs; 6465 int i; 6466 6467 if (plen > sizeof(hmacs_store)) 6468 break; 6469 if (got_hmacs) { 6470 /* already processed a HMAC list */ 6471 goto next_param; 6472 } 6473 phdr = sctp_get_next_param(m, offset, 6474 (struct sctp_paramhdr *)hmacs_store, 6475 min(plen, sizeof(hmacs_store))); 6476 if (phdr == NULL) 6477 return (-28); 6478 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6479 hmacs_len = plen - sizeof(*hmacs); 6480 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6481 /* validate the hmac list */ 6482 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6483 return (-29); 6484 } 6485 if (stcb->asoc.peer_hmacs != NULL) 6486 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6487 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6488 if (stcb->asoc.peer_hmacs != NULL) { 6489 for (i = 0; i < num_hmacs; i++) { 6490 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6491 ntohs(hmacs->hmac_ids[i])); 6492 } 6493 } 6494 got_hmacs = 1; 6495 } else if (ptype == SCTP_CHUNK_LIST) { 6496 int i; 6497 6498 if (plen > sizeof(chunks_store)) 6499 break; 6500 if (got_chklist) { 6501 /* already processed a Chunks list */ 6502 goto next_param; 6503 } 6504 phdr = sctp_get_next_param(m, offset, 6505 (struct sctp_paramhdr *)chunks_store, 6506 min(plen, sizeof(chunks_store))); 6507 if (phdr == NULL) 6508 return (-30); 6509 chunks = (struct sctp_auth_chunk_list *)phdr; 6510 num_chunks = plen - sizeof(*chunks); 6511 if (stcb->asoc.peer_auth_chunks != NULL) 6512 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6513 else 6514 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6515 for (i = 0; i < num_chunks; i++) { 6516 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6517 stcb->asoc.peer_auth_chunks); 6518 /* record asconf/asconf-ack if listed */ 6519 if (chunks->chunk_types[i] == SCTP_ASCONF) 6520 saw_asconf = 1; 6521 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6522 saw_asconf_ack = 1; 6523 6524 } 6525 got_chklist = 1; 6526 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6527 (ptype == SCTP_STATE_COOKIE) || 6528 (ptype == SCTP_UNRECOG_PARAM) || 6529 (ptype == SCTP_COOKIE_PRESERVE) || 6530 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6531 (ptype == SCTP_ADD_IP_ADDRESS) || 6532 (ptype == SCTP_DEL_IP_ADDRESS) || 6533 (ptype == SCTP_ERROR_CAUSE_IND) || 6534 (ptype == SCTP_SUCCESS_REPORT)) { 6535 /* don't care */ ; 6536 } else { 6537 if ((ptype & 0x8000) == 0x0000) { 6538 /* 6539 * must stop processing the rest of the 6540 * param's. Any report bits were handled 6541 * with the call to 6542 * sctp_arethere_unrecognized_parameters() 6543 * when the INIT or INIT-ACK was first seen. 6544 */ 6545 break; 6546 } 6547 } 6548 6549 next_param: 6550 offset += SCTP_SIZE32(plen); 6551 if (offset >= limit) { 6552 break; 6553 } 6554 phdr = sctp_get_next_param(m, offset, &parm_buf, 6555 sizeof(parm_buf)); 6556 } 6557 /* Now check to see if we need to purge any addresses */ 6558 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6559 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6560 SCTP_ADDR_NOT_IN_ASSOC) { 6561 /* This address has been removed from the asoc */ 6562 /* remove and free it */ 6563 stcb->asoc.numnets--; 6564 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6565 sctp_free_remote_addr(net); 6566 if (net == stcb->asoc.primary_destination) { 6567 stcb->asoc.primary_destination = NULL; 6568 sctp_select_primary_destination(stcb); 6569 } 6570 } 6571 } 6572 if (ecn_allowed == 0) { 6573 stcb->asoc.ecn_allowed = 0; 6574 } 6575 /* validate authentication required parameters */ 6576 if (got_random && got_hmacs) { 6577 stcb->asoc.peer_supports_auth = 1; 6578 } else { 6579 stcb->asoc.peer_supports_auth = 0; 6580 } 6581 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6582 /* peer does not support auth but sent a chunks list? */ 6583 return (-31); 6584 } 6585 if (!SCTP_BASE_SYSCTL(sctp_asconf_auth_nochk) && stcb->asoc.peer_supports_asconf && 6586 !stcb->asoc.peer_supports_auth) { 6587 /* peer supports asconf but not auth? */ 6588 return (-32); 6589 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6590 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6591 return (-33); 6592 } 6593 /* concatenate the full random key */ 6594 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6595 if (chunks != NULL) { 6596 keylen += sizeof(*chunks) + num_chunks; 6597 } 6598 new_key = sctp_alloc_key(keylen); 6599 if (new_key != NULL) { 6600 /* copy in the RANDOM */ 6601 if (p_random != NULL) { 6602 keylen = sizeof(*p_random) + random_len; 6603 bcopy(p_random, new_key->key, keylen); 6604 } 6605 /* append in the AUTH chunks */ 6606 if (chunks != NULL) { 6607 bcopy(chunks, new_key->key + keylen, 6608 sizeof(*chunks) + num_chunks); 6609 keylen += sizeof(*chunks) + num_chunks; 6610 } 6611 /* append in the HMACs */ 6612 if (hmacs != NULL) { 6613 bcopy(hmacs, new_key->key + keylen, 6614 sizeof(*hmacs) + hmacs_len); 6615 } 6616 } else { 6617 /* failed to get memory for the key */ 6618 return (-34); 6619 } 6620 if (stcb->asoc.authinfo.peer_random != NULL) 6621 sctp_free_key(stcb->asoc.authinfo.peer_random); 6622 stcb->asoc.authinfo.peer_random = new_key; 6623 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6624 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6625 6626 return (0); 6627 } 6628 6629 int 6630 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6631 struct sctp_nets *net) 6632 { 6633 /* make sure the requested primary address exists in the assoc */ 6634 if (net == NULL && sa) 6635 net = sctp_findnet(stcb, sa); 6636 6637 if (net == NULL) { 6638 /* didn't find the requested primary address! */ 6639 return (-1); 6640 } else { 6641 /* set the primary address */ 6642 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6643 /* Must be confirmed, so queue to set */ 6644 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6645 return (0); 6646 } 6647 stcb->asoc.primary_destination = net; 6648 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6649 sctp_free_remote_addr(stcb->asoc.alternate); 6650 stcb->asoc.alternate = NULL; 6651 } 6652 net = TAILQ_FIRST(&stcb->asoc.nets); 6653 if (net != stcb->asoc.primary_destination) { 6654 /* 6655 * first one on the list is NOT the primary 6656 * sctp_cmpaddr() is much more efficient if the 6657 * primary is the first on the list, make it so. 6658 */ 6659 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6660 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6661 } 6662 return (0); 6663 } 6664 } 6665 6666 int 6667 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6668 { 6669 /* 6670 * This function serves two purposes. It will see if a TAG can be 6671 * re-used and return 1 for yes it is ok and 0 for don't use that 6672 * tag. A secondary function it will do is purge out old tags that 6673 * can be removed. 6674 */ 6675 struct sctpvtaghead *chain; 6676 struct sctp_tagblock *twait_block; 6677 struct sctpasochead *head; 6678 struct sctp_tcb *stcb; 6679 int i; 6680 6681 SCTP_INP_INFO_RLOCK(); 6682 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6683 SCTP_BASE_INFO(hashasocmark))]; 6684 if (head == NULL) { 6685 /* invalid vtag */ 6686 goto skip_vtag_check; 6687 } 6688 LIST_FOREACH(stcb, head, sctp_asocs) { 6689 /* 6690 * We choose not to lock anything here. TCB's can't be 6691 * removed since we have the read lock, so they can't be 6692 * freed on us, same thing for the INP. I may be wrong with 6693 * this assumption, but we will go with it for now :-) 6694 */ 6695 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6696 continue; 6697 } 6698 if (stcb->asoc.my_vtag == tag) { 6699 /* candidate */ 6700 if (stcb->rport != rport) { 6701 continue; 6702 } 6703 if (stcb->sctp_ep->sctp_lport != lport) { 6704 continue; 6705 } 6706 /* Its a used tag set */ 6707 SCTP_INP_INFO_RUNLOCK(); 6708 return (0); 6709 } 6710 } 6711 skip_vtag_check: 6712 6713 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6714 /* Now what about timed wait ? */ 6715 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6716 /* 6717 * Block(s) are present, lets see if we have this tag in the 6718 * list 6719 */ 6720 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6721 if (twait_block->vtag_block[i].v_tag == 0) { 6722 /* not used */ 6723 continue; 6724 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6725 now->tv_sec) { 6726 /* Audit expires this guy */ 6727 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6728 twait_block->vtag_block[i].v_tag = 0; 6729 twait_block->vtag_block[i].lport = 0; 6730 twait_block->vtag_block[i].rport = 0; 6731 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6732 (twait_block->vtag_block[i].lport == lport) && 6733 (twait_block->vtag_block[i].rport == rport)) { 6734 /* Bad tag, sorry :< */ 6735 SCTP_INP_INFO_RUNLOCK(); 6736 return (0); 6737 } 6738 } 6739 } 6740 SCTP_INP_INFO_RUNLOCK(); 6741 return (1); 6742 } 6743 6744 static void 6745 sctp_drain_mbufs(struct sctp_tcb *stcb) 6746 { 6747 /* 6748 * We must hunt this association for MBUF's past the cumack (i.e. 6749 * out of order data that we can renege on). 6750 */ 6751 struct sctp_association *asoc; 6752 struct sctp_tmit_chunk *chk, *nchk; 6753 uint32_t cumulative_tsn_p1; 6754 struct sctp_queued_to_read *ctl, *nctl; 6755 int cnt, strmat; 6756 uint32_t gap, i; 6757 int fnd = 0; 6758 6759 /* We look for anything larger than the cum-ack + 1 */ 6760 6761 asoc = &stcb->asoc; 6762 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6763 /* none we can reneg on. */ 6764 return; 6765 } 6766 SCTP_STAT_INCR(sctps_protocol_drains_done); 6767 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6768 cnt = 0; 6769 /* First look in the re-assembly queue */ 6770 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6771 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6772 /* Yep it is above cum-ack */ 6773 cnt++; 6774 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6775 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6776 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6777 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6778 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6779 if (chk->data) { 6780 sctp_m_freem(chk->data); 6781 chk->data = NULL; 6782 } 6783 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6784 } 6785 } 6786 /* Ok that was fun, now we will drain all the inbound streams? */ 6787 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6788 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6789 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6790 /* Yep it is above cum-ack */ 6791 cnt++; 6792 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6793 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6794 sctp_ucount_decr(asoc->cnt_on_all_streams); 6795 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6796 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6797 if (ctl->data) { 6798 sctp_m_freem(ctl->data); 6799 ctl->data = NULL; 6800 } 6801 sctp_free_remote_addr(ctl->whoFrom); 6802 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6803 SCTP_DECR_READQ_COUNT(); 6804 } 6805 } 6806 } 6807 if (cnt) { 6808 /* We must back down to see what the new highest is */ 6809 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6810 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6811 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6812 asoc->highest_tsn_inside_map = i; 6813 fnd = 1; 6814 break; 6815 } 6816 } 6817 if (!fnd) { 6818 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6819 } 6820 /* 6821 * Question, should we go through the delivery queue? The 6822 * only reason things are on here is the app not reading OR 6823 * a p-d-api up. An attacker COULD send enough in to 6824 * initiate the PD-API and then send a bunch of stuff to 6825 * other streams... these would wind up on the delivery 6826 * queue.. and then we would not get to them. But in order 6827 * to do this I then have to back-track and un-deliver 6828 * sequence numbers in streams.. el-yucko. I think for now 6829 * we will NOT look at the delivery queue and leave it to be 6830 * something to consider later. An alternative would be to 6831 * abort the P-D-API with a notification and then deliver 6832 * the data.... Or another method might be to keep track of 6833 * how many times the situation occurs and if we see a 6834 * possible attack underway just abort the association. 6835 */ 6836 #ifdef SCTP_DEBUG 6837 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6838 #endif 6839 /* 6840 * Now do we need to find a new 6841 * asoc->highest_tsn_inside_map? 6842 */ 6843 asoc->last_revoke_count = cnt; 6844 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6845 /* sa_ignore NO_NULL_CHK */ 6846 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6847 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6848 } 6849 /* 6850 * Another issue, in un-setting the TSN's in the mapping array we 6851 * DID NOT adjust the highest_tsn marker. This will cause one of 6852 * two things to occur. It may cause us to do extra work in checking 6853 * for our mapping array movement. More importantly it may cause us 6854 * to SACK every datagram. This may not be a bad thing though since 6855 * we will recover once we get our cum-ack above and all this stuff 6856 * we dumped recovered. 6857 */ 6858 } 6859 6860 void 6861 sctp_drain() 6862 { 6863 /* 6864 * We must walk the PCB lists for ALL associations here. The system 6865 * is LOW on MBUF's and needs help. This is where reneging will 6866 * occur. We really hope this does NOT happen! 6867 */ 6868 VNET_ITERATOR_DECL(vnet_iter); 6869 VNET_LIST_RLOCK_NOSLEEP(); 6870 VNET_FOREACH(vnet_iter) { 6871 CURVNET_SET(vnet_iter); 6872 struct sctp_inpcb *inp; 6873 struct sctp_tcb *stcb; 6874 6875 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6876 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6877 #ifdef VIMAGE 6878 continue; 6879 #else 6880 return; 6881 #endif 6882 } 6883 SCTP_INP_INFO_RLOCK(); 6884 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6885 /* For each endpoint */ 6886 SCTP_INP_RLOCK(inp); 6887 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6888 /* For each association */ 6889 SCTP_TCB_LOCK(stcb); 6890 sctp_drain_mbufs(stcb); 6891 SCTP_TCB_UNLOCK(stcb); 6892 } 6893 SCTP_INP_RUNLOCK(inp); 6894 } 6895 SCTP_INP_INFO_RUNLOCK(); 6896 CURVNET_RESTORE(); 6897 } 6898 VNET_LIST_RUNLOCK_NOSLEEP(); 6899 } 6900 6901 /* 6902 * start a new iterator 6903 * iterates through all endpoints and associations based on the pcb_state 6904 * flags and asoc_state. "af" (mandatory) is executed for all matching 6905 * assocs and "ef" (optional) is executed when the iterator completes. 6906 * "inpf" (optional) is executed for each new endpoint as it is being 6907 * iterated through. inpe (optional) is called when the inp completes 6908 * its way through all the stcbs. 6909 */ 6910 int 6911 sctp_initiate_iterator(inp_func inpf, 6912 asoc_func af, 6913 inp_func inpe, 6914 uint32_t pcb_state, 6915 uint32_t pcb_features, 6916 uint32_t asoc_state, 6917 void *argp, 6918 uint32_t argi, 6919 end_func ef, 6920 struct sctp_inpcb *s_inp, 6921 uint8_t chunk_output_off) 6922 { 6923 struct sctp_iterator *it = NULL; 6924 6925 if (af == NULL) { 6926 return (-1); 6927 } 6928 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6929 SCTP_M_ITER); 6930 if (it == NULL) { 6931 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6932 return (ENOMEM); 6933 } 6934 memset(it, 0, sizeof(*it)); 6935 it->function_assoc = af; 6936 it->function_inp = inpf; 6937 if (inpf) 6938 it->done_current_ep = 0; 6939 else 6940 it->done_current_ep = 1; 6941 it->function_atend = ef; 6942 it->pointer = argp; 6943 it->val = argi; 6944 it->pcb_flags = pcb_state; 6945 it->pcb_features = pcb_features; 6946 it->asoc_state = asoc_state; 6947 it->function_inp_end = inpe; 6948 it->no_chunk_output = chunk_output_off; 6949 it->vn = curvnet; 6950 if (s_inp) { 6951 /* Assume lock is held here */ 6952 it->inp = s_inp; 6953 SCTP_INP_INCR_REF(it->inp); 6954 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 6955 } else { 6956 SCTP_INP_INFO_RLOCK(); 6957 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 6958 if (it->inp) { 6959 SCTP_INP_INCR_REF(it->inp); 6960 } 6961 SCTP_INP_INFO_RUNLOCK(); 6962 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 6963 6964 } 6965 SCTP_IPI_ITERATOR_WQ_LOCK(); 6966 6967 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 6968 if (sctp_it_ctl.iterator_running == 0) { 6969 sctp_wakeup_iterator(); 6970 } 6971 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 6972 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 6973 return (0); 6974 } 6975