1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_header.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_timer.h> 47 #include <netinet/sctp_bsd_addr.h> 48 #include <netinet/sctp_dtrace_define.h> 49 #if defined(INET) || defined(INET6) 50 #include <netinet/udp.h> 51 #endif 52 #ifdef INET6 53 #include <netinet6/ip6_var.h> 54 #endif 55 #include <sys/sched.h> 56 #include <sys/smp.h> 57 #include <sys/unistd.h> 58 59 60 VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62 /* FIX: we don't handle multiple link local scopes */ 63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64 #ifdef INET6 65 int 66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67 { 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return (0); 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return (0); 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79 } 80 81 #endif 82 83 void 84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85 { 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 SCTP_INP_INFO_RUNLOCK(); 100 } 101 102 /*- 103 * Addresses are added to VRF's (Virtual Router's). For BSD we 104 * have only the default VRF 0. We maintain a hash list of 105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 106 * these has a list of addresses. When we add a new address 107 * to a VRF we lookup the ifn/ifn_index, if the ifn does 108 * not exist we create it and add it to the list of IFN's 109 * within the VRF. Once we have the sctp_ifn, we add the 110 * address to the list. So we look something like: 111 * 112 * hash-vrf-table 113 * vrf-> ifn-> ifn -> ifn 114 * vrf | 115 * ... +--ifa-> ifa -> ifa 116 * vrf 117 * 118 * We keep these separate lists since the SCTP subsystem will 119 * point to these from its source address selection nets structure. 120 * When an address is deleted it does not happen right away on 121 * the SCTP side, it gets scheduled. What we do when a 122 * delete happens is immediately remove the address from 123 * the master list and decrement the refcount. As our 124 * addip iterator works through and frees the src address 125 * selection pointing to the sctp_ifa, eventually the refcount 126 * will reach 0 and we will delete it. Note that it is assumed 127 * that any locking on system level ifn/ifa is done at the 128 * caller of these functions and these routines will only 129 * lock the SCTP structures as they add or delete things. 130 * 131 * Other notes on VRF concepts. 132 * - An endpoint can be in multiple VRF's 133 * - An association lives within a VRF and only one VRF. 134 * - Any incoming packet we can deduce the VRF for by 135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 136 * - Any downward send call or connect call must supply the 137 * VRF via ancillary data or via some sort of set default 138 * VRF socket option call (again for BSD no brainer since 139 * the VRF is always 0). 140 * - An endpoint may add multiple VRF's to it. 141 * - Listening sockets can accept associations in any 142 * of the VRF's they are in but the assoc will end up 143 * in only one VRF (gotten from the packet or connect/send). 144 * 145 */ 146 147 struct sctp_vrf * 148 sctp_allocate_vrf(int vrf_id) 149 { 150 struct sctp_vrf *vrf = NULL; 151 struct sctp_vrflist *bucket; 152 153 /* First allocate the VRF structure */ 154 vrf = sctp_find_vrf(vrf_id); 155 if (vrf) { 156 /* Already allocated */ 157 return (vrf); 158 } 159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 160 SCTP_M_VRF); 161 if (vrf == NULL) { 162 /* No memory */ 163 #ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165 #endif 166 return (NULL); 167 } 168 /* setup the VRF */ 169 memset(vrf, 0, sizeof(struct sctp_vrf)); 170 vrf->vrf_id = vrf_id; 171 LIST_INIT(&vrf->ifnlist); 172 vrf->total_ifa_count = 0; 173 vrf->refcount = 0; 174 /* now also setup table ids */ 175 SCTP_INIT_VRF_TABLEID(vrf); 176 /* Init the HASH of addresses */ 177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 178 &vrf->vrf_addr_hashmark); 179 if (vrf->vrf_addr_hash == NULL) { 180 /* No memory */ 181 #ifdef INVARIANTS 182 panic("No memory for VRF:%d", vrf_id); 183 #endif 184 SCTP_FREE(vrf, SCTP_M_VRF); 185 return (NULL); 186 } 187 /* Add it to the hash table */ 188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 189 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 191 return (vrf); 192 } 193 194 195 struct sctp_ifn * 196 sctp_find_ifn(void *ifn, uint32_t ifn_index) 197 { 198 struct sctp_ifn *sctp_ifnp; 199 struct sctp_ifnlist *hash_ifn_head; 200 201 /* 202 * We assume the lock is held for the addresses if that's wrong 203 * problems could occur :-) 204 */ 205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 207 if (sctp_ifnp->ifn_index == ifn_index) { 208 return (sctp_ifnp); 209 } 210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 211 return (sctp_ifnp); 212 } 213 } 214 return (NULL); 215 } 216 217 218 struct sctp_vrf * 219 sctp_find_vrf(uint32_t vrf_id) 220 { 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231 } 232 233 234 void 235 sctp_free_vrf(struct sctp_vrf *vrf) 236 { 237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 238 if (vrf->vrf_addr_hash) { 239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 240 vrf->vrf_addr_hash = NULL; 241 } 242 /* We zero'd the count */ 243 LIST_REMOVE(vrf, next_vrf); 244 SCTP_FREE(vrf, SCTP_M_VRF); 245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 246 } 247 } 248 249 250 void 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252 { 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261 } 262 263 264 void 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 266 { 267 struct sctp_ifn *sctp_ifnp; 268 269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 270 if (sctp_ifnp != NULL) { 271 sctp_ifnp->ifn_mtu = mtu; 272 } 273 } 274 275 276 void 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 278 { 279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 280 /* We zero'd the count */ 281 if (sctp_ifap->ifn_p) { 282 sctp_free_ifn(sctp_ifap->ifn_p); 283 } 284 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 286 } 287 } 288 289 290 static void 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 292 { 293 struct sctp_ifn *found; 294 295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 296 if (found == NULL) { 297 /* Not in the list.. sorry */ 298 return; 299 } 300 if (hold_addr_lock == 0) 301 SCTP_IPI_ADDR_WLOCK(); 302 LIST_REMOVE(sctp_ifnp, next_bucket); 303 LIST_REMOVE(sctp_ifnp, next_ifn); 304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 305 sctp_ifnp->registered_af); 306 if (hold_addr_lock == 0) 307 SCTP_IPI_ADDR_WUNLOCK(); 308 /* Take away the reference, and possibly free it */ 309 sctp_free_ifn(sctp_ifnp); 310 } 311 312 313 void 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 315 const char *if_name, uint32_t ifn_index) 316 { 317 struct sctp_vrf *vrf; 318 struct sctp_ifa *sctp_ifap; 319 320 SCTP_IPI_ADDR_RLOCK(); 321 vrf = sctp_find_vrf(vrf_id); 322 if (vrf == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 324 goto out; 325 326 } 327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 328 if (sctp_ifap == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 330 goto out; 331 } 332 if (sctp_ifap->ifn_p == NULL) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 334 goto out; 335 } 336 if (if_name) { 337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 339 sctp_ifap->ifn_p->ifn_name, if_name); 340 goto out; 341 } 342 } else { 343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 345 sctp_ifap->ifn_p->ifn_index, ifn_index); 346 goto out; 347 } 348 } 349 350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 352 out: 353 SCTP_IPI_ADDR_RUNLOCK(); 354 } 355 356 357 void 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 359 const char *if_name, uint32_t ifn_index) 360 { 361 struct sctp_vrf *vrf; 362 struct sctp_ifa *sctp_ifap; 363 364 SCTP_IPI_ADDR_RLOCK(); 365 vrf = sctp_find_vrf(vrf_id); 366 if (vrf == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 368 goto out; 369 370 } 371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 372 if (sctp_ifap == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 374 goto out; 375 } 376 if (sctp_ifap->ifn_p == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 378 goto out; 379 } 380 if (if_name) { 381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 383 sctp_ifap->ifn_p->ifn_name, if_name); 384 goto out; 385 } 386 } else { 387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 389 sctp_ifap->ifn_p->ifn_index, ifn_index); 390 goto out; 391 } 392 } 393 394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 396 out: 397 SCTP_IPI_ADDR_RUNLOCK(); 398 } 399 400 401 /*- 402 * Add an ifa to an ifn. 403 * Register the interface as necessary. 404 * NOTE: ADDR write lock MUST be held. 405 */ 406 static void 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 408 { 409 int ifa_af; 410 411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 412 sctp_ifap->ifn_p = sctp_ifnp; 413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 414 /* update address counts */ 415 sctp_ifnp->ifa_count++; 416 ifa_af = sctp_ifap->address.sa.sa_family; 417 switch (ifa_af) { 418 #ifdef INET 419 case AF_INET: 420 sctp_ifnp->num_v4++; 421 break; 422 #endif 423 #ifdef INET6 424 case AF_INET6: 425 sctp_ifnp->num_v6++; 426 break; 427 #endif 428 default: 429 break; 430 } 431 if (sctp_ifnp->ifa_count == 1) { 432 /* register the new interface */ 433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 434 sctp_ifnp->registered_af = ifa_af; 435 } 436 } 437 438 439 /*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445 static void 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447 { 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453 #ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457 #endif 458 #ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462 #endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 476 sctp_ifap->ifn_p->registered_af = AF_INET; 477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 478 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 481 sctp_ifap->ifn_p->registered_af = AF_INET6; 482 } 483 /* free the ifn refcount */ 484 sctp_free_ifn(sctp_ifap->ifn_p); 485 } 486 sctp_ifap->ifn_p = NULL; 487 } 488 } 489 490 491 struct sctp_ifa * 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 493 uint32_t ifn_type, const char *if_name, void *ifa, 494 struct sockaddr *addr, uint32_t ifa_flags, 495 int dynamic_add) 496 { 497 struct sctp_vrf *vrf; 498 struct sctp_ifn *sctp_ifnp = NULL; 499 struct sctp_ifa *sctp_ifap = NULL; 500 struct sctp_ifalist *hash_addr_head; 501 struct sctp_ifnlist *hash_ifn_head; 502 uint32_t hash_of_addr; 503 int new_ifn_af = 0; 504 505 #ifdef SCTP_DEBUG 506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 508 #endif 509 SCTP_IPI_ADDR_WLOCK(); 510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 511 if (sctp_ifnp) { 512 vrf = sctp_ifnp->vrf; 513 } else { 514 vrf = sctp_find_vrf(vrf_id); 515 if (vrf == NULL) { 516 vrf = sctp_allocate_vrf(vrf_id); 517 if (vrf == NULL) { 518 SCTP_IPI_ADDR_WUNLOCK(); 519 return (NULL); 520 } 521 } 522 } 523 if (sctp_ifnp == NULL) { 524 /* 525 * build one and add it, can't hold lock until after malloc 526 * done though. 527 */ 528 SCTP_IPI_ADDR_WUNLOCK(); 529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 530 sizeof(struct sctp_ifn), SCTP_M_IFN); 531 if (sctp_ifnp == NULL) { 532 #ifdef INVARIANTS 533 panic("No memory for IFN"); 534 #endif 535 return (NULL); 536 } 537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 538 sctp_ifnp->ifn_index = ifn_index; 539 sctp_ifnp->ifn_p = ifn; 540 sctp_ifnp->ifn_type = ifn_type; 541 sctp_ifnp->refcount = 0; 542 sctp_ifnp->vrf = vrf; 543 atomic_add_int(&vrf->refcount, 1); 544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 545 if (if_name != NULL) { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 547 } else { 548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 549 } 550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 551 LIST_INIT(&sctp_ifnp->ifalist); 552 SCTP_IPI_ADDR_WLOCK(); 553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 556 new_ifn_af = 1; 557 } 558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 559 if (sctp_ifap) { 560 /* Hmm, it already exists? */ 561 if ((sctp_ifap->ifn_p) && 562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 564 sctp_ifap->ifn_p->ifn_name, ifn_index, 565 (void *)sctp_ifap); 566 if (new_ifn_af) { 567 /* Remove the created one that we don't want */ 568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 569 } 570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 571 /* easy to solve, just switch back to active */ 572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 574 sctp_ifap->ifn_p = sctp_ifnp; 575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 576 } 577 exit_stage_left: 578 SCTP_IPI_ADDR_WUNLOCK(); 579 return (sctp_ifap); 580 } else { 581 if (sctp_ifap->ifn_p) { 582 /* 583 * The last IFN gets the address, remove the 584 * old one 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 588 sctp_ifap->ifn_p->ifn_index, if_name, 589 ifn_index); 590 /* remove the address from the old ifn */ 591 sctp_remove_ifa_from_ifn(sctp_ifap); 592 /* move the address over to the new ifn */ 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 goto exit_stage_left; 595 } else { 596 /* repair ifnp which was NULL ? */ 597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 599 (void *)sctp_ifnp, (void *)sctp_ifap); 600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 601 } 602 goto exit_stage_left; 603 } 604 } 605 SCTP_IPI_ADDR_WUNLOCK(); 606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 607 if (sctp_ifap == NULL) { 608 #ifdef INVARIANTS 609 panic("No memory for IFA"); 610 #endif 611 return (NULL); 612 } 613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 614 sctp_ifap->ifn_p = sctp_ifnp; 615 atomic_add_int(&sctp_ifnp->refcount, 1); 616 sctp_ifap->vrf_id = vrf_id; 617 sctp_ifap->ifa = ifa; 618 memcpy(&sctp_ifap->address, addr, addr->sa_len); 619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 620 sctp_ifap->flags = ifa_flags; 621 /* Set scope */ 622 switch (sctp_ifap->address.sa.sa_family) { 623 #ifdef INET 624 case AF_INET: 625 { 626 struct sockaddr_in *sin; 627 628 sin = &sctp_ifap->address.sin; 629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 631 sctp_ifap->src_is_loop = 1; 632 } 633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 634 sctp_ifap->src_is_priv = 1; 635 } 636 sctp_ifnp->num_v4++; 637 if (new_ifn_af) 638 new_ifn_af = AF_INET; 639 break; 640 } 641 #endif 642 #ifdef INET6 643 case AF_INET6: 644 { 645 /* ok to use deprecated addresses? */ 646 struct sockaddr_in6 *sin6; 647 648 sin6 = &sctp_ifap->address.sin6; 649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 651 sctp_ifap->src_is_loop = 1; 652 } 653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 654 sctp_ifap->src_is_priv = 1; 655 } 656 sctp_ifnp->num_v6++; 657 if (new_ifn_af) 658 new_ifn_af = AF_INET6; 659 break; 660 } 661 #endif 662 default: 663 new_ifn_af = 0; 664 break; 665 } 666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 667 668 if ((sctp_ifap->src_is_priv == 0) && 669 (sctp_ifap->src_is_loop == 0)) { 670 sctp_ifap->src_is_glob = 1; 671 } 672 SCTP_IPI_ADDR_WLOCK(); 673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 675 sctp_ifap->refcount = 1; 676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 677 sctp_ifnp->ifa_count++; 678 vrf->total_ifa_count++; 679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 680 if (new_ifn_af) { 681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 682 sctp_ifnp->registered_af = new_ifn_af; 683 } 684 SCTP_IPI_ADDR_WUNLOCK(); 685 if (dynamic_add) { 686 /* 687 * Bump up the refcount so that when the timer completes it 688 * will drop back down. 689 */ 690 struct sctp_laddr *wi; 691 692 atomic_add_int(&sctp_ifap->refcount, 1); 693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 694 if (wi == NULL) { 695 /* 696 * Gak, what can we do? We have lost an address 697 * change can you say HOSED? 698 */ 699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 700 /* Opps, must decrement the count */ 701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 702 if_name); 703 return (NULL); 704 } 705 SCTP_INCR_LADDR_COUNT(); 706 bzero(wi, sizeof(*wi)); 707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 708 wi->ifa = sctp_ifap; 709 wi->action = SCTP_ADD_IP_ADDRESS; 710 711 SCTP_WQ_ADDR_LOCK(); 712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 713 SCTP_WQ_ADDR_UNLOCK(); 714 715 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 716 (struct sctp_inpcb *)NULL, 717 (struct sctp_tcb *)NULL, 718 (struct sctp_nets *)NULL); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724 } 725 726 void 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729 { 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739 #ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742 #endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. We do this especially for 752 * panda who might recycle indexes fast. 753 */ 754 if (if_name) { 755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 756 /* They match its a correct delete */ 757 valid = 1; 758 } 759 } 760 if (!valid) { 761 /* last ditch check ifn_index */ 762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 763 valid = 1; 764 } 765 } 766 if (!valid) { 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 768 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 771 SCTP_IPI_ADDR_WUNLOCK(); 772 return; 773 } 774 } 775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 777 /* 778 * We don't set the flag. This means that the structure will 779 * hang around in EP's that have bound specific to it until 780 * they close. This gives us TCP like behavior if someone 781 * removes an address (or for that matter adds it right 782 * back). 783 */ 784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 785 vrf->total_ifa_count--; 786 LIST_REMOVE(sctp_ifap, next_bucket); 787 sctp_remove_ifa_from_ifn(sctp_ifap); 788 } 789 #ifdef SCTP_DEBUG 790 else { 791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 792 ifn_index); 793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 794 } 795 #endif 796 797 out_now: 798 SCTP_IPI_ADDR_WUNLOCK(); 799 if (sctp_ifap) { 800 struct sctp_laddr *wi; 801 802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 803 if (wi == NULL) { 804 /* 805 * Gak, what can we do? We have lost an address 806 * change can you say HOSED? 807 */ 808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 809 810 /* Oops, must decrement the count */ 811 sctp_free_ifa(sctp_ifap); 812 return; 813 } 814 SCTP_INCR_LADDR_COUNT(); 815 bzero(wi, sizeof(*wi)); 816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 817 wi->ifa = sctp_ifap; 818 wi->action = SCTP_DEL_IP_ADDRESS; 819 SCTP_WQ_ADDR_LOCK(); 820 /* 821 * Should this really be a tailq? As it is we will process 822 * the newest first :-0 823 */ 824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 825 SCTP_WQ_ADDR_UNLOCK(); 826 827 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 828 (struct sctp_inpcb *)NULL, 829 (struct sctp_tcb *)NULL, 830 (struct sctp_nets *)NULL); 831 } 832 return; 833 } 834 835 836 static int 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 838 { 839 int loopback_scope; 840 841 #if defined(INET) 842 int ipv4_local_scope, ipv4_addr_legal; 843 844 #endif 845 #if defined(INET6) 846 int local_scope, site_scope, ipv6_addr_legal; 847 848 #endif 849 struct sctp_vrf *vrf; 850 struct sctp_ifn *sctp_ifn; 851 struct sctp_ifa *sctp_ifa; 852 853 loopback_scope = stcb->asoc.scope.loopback_scope; 854 #if defined(INET) 855 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 856 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 857 #endif 858 #if defined(INET6) 859 local_scope = stcb->asoc.scope.local_scope; 860 site_scope = stcb->asoc.scope.site_scope; 861 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 862 #endif 863 864 SCTP_IPI_ADDR_RLOCK(); 865 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 866 if (vrf == NULL) { 867 /* no vrf, no addresses */ 868 SCTP_IPI_ADDR_RUNLOCK(); 869 return (0); 870 } 871 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 872 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 873 if ((loopback_scope == 0) && 874 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 875 continue; 876 } 877 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 878 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 879 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 880 /* 881 * We allow pending addresses, where 882 * we have sent an asconf-add to be 883 * considered valid. 884 */ 885 continue; 886 } 887 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 888 continue; 889 } 890 switch (sctp_ifa->address.sa.sa_family) { 891 #ifdef INET 892 case AF_INET: 893 if (ipv4_addr_legal) { 894 struct sockaddr_in *sin, 895 *rsin; 896 897 sin = &sctp_ifa->address.sin; 898 rsin = (struct sockaddr_in *)to; 899 if ((ipv4_local_scope == 0) && 900 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 901 continue; 902 } 903 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 904 &sin->sin_addr) != 0) { 905 continue; 906 } 907 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 908 SCTP_IPI_ADDR_RUNLOCK(); 909 return (1); 910 } 911 } 912 break; 913 #endif 914 #ifdef INET6 915 case AF_INET6: 916 if (ipv6_addr_legal) { 917 struct sockaddr_in6 *sin6, 918 *rsin6; 919 920 sin6 = &sctp_ifa->address.sin6; 921 rsin6 = (struct sockaddr_in6 *)to; 922 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 923 &sin6->sin6_addr) != 0) { 924 continue; 925 } 926 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 927 if (local_scope == 0) 928 continue; 929 if (sin6->sin6_scope_id == 0) { 930 if (sa6_recoverscope(sin6) != 0) 931 continue; 932 } 933 } 934 if ((site_scope == 0) && 935 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 936 continue; 937 } 938 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 939 SCTP_IPI_ADDR_RUNLOCK(); 940 return (1); 941 } 942 } 943 break; 944 #endif 945 default: 946 /* TSNH */ 947 break; 948 } 949 } 950 } 951 } else { 952 struct sctp_laddr *laddr; 953 954 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 955 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 956 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 957 continue; 958 } 959 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 960 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 961 /* 962 * We allow pending addresses, where we have 963 * sent an asconf-add to be considered 964 * valid. 965 */ 966 continue; 967 } 968 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 969 continue; 970 } 971 switch (to->sa_family) { 972 #ifdef INET 973 case AF_INET: 974 { 975 struct sockaddr_in *sin, *rsin; 976 977 sin = &laddr->ifa->address.sin; 978 rsin = (struct sockaddr_in *)to; 979 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 980 SCTP_IPI_ADDR_RUNLOCK(); 981 return (1); 982 } 983 break; 984 } 985 #endif 986 #ifdef INET6 987 case AF_INET6: 988 { 989 struct sockaddr_in6 *sin6, *rsin6; 990 991 sin6 = &laddr->ifa->address.sin6; 992 rsin6 = (struct sockaddr_in6 *)to; 993 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (1); 996 } 997 break; 998 } 999 1000 #endif 1001 default: 1002 /* TSNH */ 1003 break; 1004 } 1005 1006 } 1007 } 1008 SCTP_IPI_ADDR_RUNLOCK(); 1009 return (0); 1010 } 1011 1012 1013 static struct sctp_tcb * 1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1015 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1016 { 1017 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1018 /* 1019 * If we support the TCP model, then we must now dig through to see 1020 * if we can find our endpoint in the list of tcp ep's. 1021 */ 1022 uint16_t lport, rport; 1023 struct sctppcbhead *ephead; 1024 struct sctp_inpcb *inp; 1025 struct sctp_laddr *laddr; 1026 struct sctp_tcb *stcb; 1027 struct sctp_nets *net; 1028 1029 if ((to == NULL) || (from == NULL)) { 1030 return (NULL); 1031 } 1032 switch (to->sa_family) { 1033 #ifdef INET 1034 case AF_INET: 1035 if (from->sa_family == AF_INET) { 1036 lport = ((struct sockaddr_in *)to)->sin_port; 1037 rport = ((struct sockaddr_in *)from)->sin_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042 #endif 1043 #ifdef INET6 1044 case AF_INET6: 1045 if (from->sa_family == AF_INET6) { 1046 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1047 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1048 } else { 1049 return (NULL); 1050 } 1051 break; 1052 #endif 1053 default: 1054 return (NULL); 1055 } 1056 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1057 /* 1058 * Ok now for each of the guys in this bucket we must look and see: 1059 * - Does the remote port match. - Does there single association's 1060 * addresses match this address (to). If so we update p_ep to point 1061 * to this ep and return the tcb from it. 1062 */ 1063 LIST_FOREACH(inp, ephead, sctp_hash) { 1064 SCTP_INP_RLOCK(inp); 1065 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 if (lport != inp->sctp_lport) { 1070 SCTP_INP_RUNLOCK(inp); 1071 continue; 1072 } 1073 switch (to->sa_family) { 1074 #ifdef INET 1075 case AF_INET: 1076 { 1077 struct sockaddr_in *sin; 1078 1079 sin = (struct sockaddr_in *)to; 1080 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1081 &sin->sin_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087 #endif 1088 #ifdef INET6 1089 case AF_INET6: 1090 { 1091 struct sockaddr_in6 *sin6; 1092 1093 sin6 = (struct sockaddr_in6 *)to; 1094 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1095 &sin6->sin6_addr) != 0) { 1096 SCTP_INP_RUNLOCK(inp); 1097 continue; 1098 } 1099 break; 1100 } 1101 #endif 1102 default: 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 if (inp->def_vrf_id != vrf_id) { 1107 SCTP_INP_RUNLOCK(inp); 1108 continue; 1109 } 1110 /* check to see if the ep has one of the addresses */ 1111 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1112 /* We are NOT bound all, so look further */ 1113 int match = 0; 1114 1115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1116 1117 if (laddr->ifa == NULL) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 1119 continue; 1120 } 1121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1122 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1123 continue; 1124 } 1125 if (laddr->ifa->address.sa.sa_family == 1126 to->sa_family) { 1127 /* see if it matches */ 1128 #ifdef INET 1129 if (from->sa_family == AF_INET) { 1130 struct sockaddr_in *intf_addr, 1131 *sin; 1132 1133 intf_addr = &laddr->ifa->address.sin; 1134 sin = (struct sockaddr_in *)to; 1135 if (sin->sin_addr.s_addr == 1136 intf_addr->sin_addr.s_addr) { 1137 match = 1; 1138 break; 1139 } 1140 } 1141 #endif 1142 #ifdef INET6 1143 if (from->sa_family == AF_INET6) { 1144 struct sockaddr_in6 *intf_addr6; 1145 struct sockaddr_in6 *sin6; 1146 1147 sin6 = (struct sockaddr_in6 *) 1148 to; 1149 intf_addr6 = &laddr->ifa->address.sin6; 1150 1151 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1152 intf_addr6)) { 1153 match = 1; 1154 break; 1155 } 1156 } 1157 #endif 1158 } 1159 } 1160 if (match == 0) { 1161 /* This endpoint does not have this address */ 1162 SCTP_INP_RUNLOCK(inp); 1163 continue; 1164 } 1165 } 1166 /* 1167 * Ok if we hit here the ep has the address, does it hold 1168 * the tcb? 1169 */ 1170 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1171 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1172 if (stcb == NULL) { 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 SCTP_TCB_LOCK(stcb); 1177 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1178 SCTP_TCB_UNLOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 continue; 1181 } 1182 if (stcb->rport != rport) { 1183 /* remote port does not match. */ 1184 SCTP_TCB_UNLOCK(stcb); 1185 SCTP_INP_RUNLOCK(inp); 1186 continue; 1187 } 1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1189 SCTP_TCB_UNLOCK(stcb); 1190 SCTP_INP_RUNLOCK(inp); 1191 continue; 1192 } 1193 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 continue; 1197 } 1198 /* Does this TCB have a matching address? */ 1199 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1200 1201 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1202 /* not the same family, can't be a match */ 1203 continue; 1204 } 1205 switch (from->sa_family) { 1206 #ifdef INET 1207 case AF_INET: 1208 { 1209 struct sockaddr_in *sin, *rsin; 1210 1211 sin = (struct sockaddr_in *)&net->ro._l_addr; 1212 rsin = (struct sockaddr_in *)from; 1213 if (sin->sin_addr.s_addr == 1214 rsin->sin_addr.s_addr) { 1215 /* found it */ 1216 if (netp != NULL) { 1217 *netp = net; 1218 } 1219 /* 1220 * Update the endpoint 1221 * pointer 1222 */ 1223 *inp_p = inp; 1224 SCTP_INP_RUNLOCK(inp); 1225 return (stcb); 1226 } 1227 break; 1228 } 1229 #endif 1230 #ifdef INET6 1231 case AF_INET6: 1232 { 1233 struct sockaddr_in6 *sin6, *rsin6; 1234 1235 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1236 rsin6 = (struct sockaddr_in6 *)from; 1237 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1238 rsin6)) { 1239 /* found it */ 1240 if (netp != NULL) { 1241 *netp = net; 1242 } 1243 /* 1244 * Update the endpoint 1245 * pointer 1246 */ 1247 *inp_p = inp; 1248 SCTP_INP_RUNLOCK(inp); 1249 return (stcb); 1250 } 1251 break; 1252 } 1253 #endif 1254 default: 1255 /* TSNH */ 1256 break; 1257 } 1258 } 1259 SCTP_TCB_UNLOCK(stcb); 1260 SCTP_INP_RUNLOCK(inp); 1261 } 1262 return (NULL); 1263 } 1264 1265 1266 /* 1267 * rules for use 1268 * 1269 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1270 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1271 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1272 * NULL. 1273 */ 1274 1275 struct sctp_tcb * 1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1277 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1278 { 1279 struct sctpasochead *head; 1280 struct sctp_inpcb *inp; 1281 struct sctp_tcb *stcb = NULL; 1282 struct sctp_nets *net; 1283 uint16_t rport; 1284 1285 inp = *inp_p; 1286 switch (remote->sa_family) { 1287 #ifdef INET 1288 case AF_INET: 1289 rport = (((struct sockaddr_in *)remote)->sin_port); 1290 break; 1291 #endif 1292 #ifdef INET6 1293 case AF_INET6: 1294 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1295 break; 1296 #endif 1297 default: 1298 return (NULL); 1299 } 1300 if (locked_tcb) { 1301 /* 1302 * UN-lock so we can do proper locking here this occurs when 1303 * called from load_addresses_from_init. 1304 */ 1305 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1306 SCTP_TCB_UNLOCK(locked_tcb); 1307 } 1308 SCTP_INP_INFO_RLOCK(); 1309 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1310 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1311 /*- 1312 * Now either this guy is our listener or it's the 1313 * connector. If it is the one that issued the connect, then 1314 * it's only chance is to be the first TCB in the list. If 1315 * it is the acceptor, then do the special_lookup to hash 1316 * and find the real inp. 1317 */ 1318 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1319 /* to is peer addr, from is my addr */ 1320 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1321 netp, inp->def_vrf_id); 1322 if ((stcb != NULL) && (locked_tcb == NULL)) { 1323 /* we have a locked tcb, lower refcount */ 1324 SCTP_INP_DECR_REF(inp); 1325 } 1326 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1327 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1328 SCTP_TCB_LOCK(locked_tcb); 1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1330 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1331 } 1332 SCTP_INP_INFO_RUNLOCK(); 1333 return (stcb); 1334 } else { 1335 SCTP_INP_WLOCK(inp); 1336 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1337 goto null_return; 1338 } 1339 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1340 if (stcb == NULL) { 1341 goto null_return; 1342 } 1343 SCTP_TCB_LOCK(stcb); 1344 1345 if (stcb->rport != rport) { 1346 /* remote port does not match. */ 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1355 SCTP_TCB_UNLOCK(stcb); 1356 goto null_return; 1357 } 1358 /* now look at the list of remote addresses */ 1359 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1360 #ifdef INVARIANTS 1361 if (net == (TAILQ_NEXT(net, sctp_next))) { 1362 panic("Corrupt net list"); 1363 } 1364 #endif 1365 if (net->ro._l_addr.sa.sa_family != 1366 remote->sa_family) { 1367 /* not the same family */ 1368 continue; 1369 } 1370 switch (remote->sa_family) { 1371 #ifdef INET 1372 case AF_INET: 1373 { 1374 struct sockaddr_in *sin, 1375 *rsin; 1376 1377 sin = (struct sockaddr_in *) 1378 &net->ro._l_addr; 1379 rsin = (struct sockaddr_in *)remote; 1380 if (sin->sin_addr.s_addr == 1381 rsin->sin_addr.s_addr) { 1382 /* found it */ 1383 if (netp != NULL) { 1384 *netp = net; 1385 } 1386 if (locked_tcb == NULL) { 1387 SCTP_INP_DECR_REF(inp); 1388 } else if (locked_tcb != stcb) { 1389 SCTP_TCB_LOCK(locked_tcb); 1390 } 1391 if (locked_tcb) { 1392 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1393 } 1394 SCTP_INP_WUNLOCK(inp); 1395 SCTP_INP_INFO_RUNLOCK(); 1396 return (stcb); 1397 } 1398 break; 1399 } 1400 #endif 1401 #ifdef INET6 1402 case AF_INET6: 1403 { 1404 struct sockaddr_in6 *sin6, 1405 *rsin6; 1406 1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1408 rsin6 = (struct sockaddr_in6 *)remote; 1409 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1410 rsin6)) { 1411 /* found it */ 1412 if (netp != NULL) { 1413 *netp = net; 1414 } 1415 if (locked_tcb == NULL) { 1416 SCTP_INP_DECR_REF(inp); 1417 } else if (locked_tcb != stcb) { 1418 SCTP_TCB_LOCK(locked_tcb); 1419 } 1420 if (locked_tcb) { 1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1422 } 1423 SCTP_INP_WUNLOCK(inp); 1424 SCTP_INP_INFO_RUNLOCK(); 1425 return (stcb); 1426 } 1427 break; 1428 } 1429 #endif 1430 default: 1431 /* TSNH */ 1432 break; 1433 } 1434 } 1435 SCTP_TCB_UNLOCK(stcb); 1436 } 1437 } else { 1438 SCTP_INP_WLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 goto null_return; 1441 } 1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1443 inp->sctp_hashmark)]; 1444 if (head == NULL) { 1445 goto null_return; 1446 } 1447 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1448 if (stcb->rport != rport) { 1449 /* remote port does not match */ 1450 continue; 1451 } 1452 SCTP_TCB_LOCK(stcb); 1453 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1454 SCTP_TCB_UNLOCK(stcb); 1455 continue; 1456 } 1457 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1458 SCTP_TCB_UNLOCK(stcb); 1459 continue; 1460 } 1461 /* now look at the list of remote addresses */ 1462 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1463 #ifdef INVARIANTS 1464 if (net == (TAILQ_NEXT(net, sctp_next))) { 1465 panic("Corrupt net list"); 1466 } 1467 #endif 1468 if (net->ro._l_addr.sa.sa_family != 1469 remote->sa_family) { 1470 /* not the same family */ 1471 continue; 1472 } 1473 switch (remote->sa_family) { 1474 #ifdef INET 1475 case AF_INET: 1476 { 1477 struct sockaddr_in *sin, 1478 *rsin; 1479 1480 sin = (struct sockaddr_in *) 1481 &net->ro._l_addr; 1482 rsin = (struct sockaddr_in *)remote; 1483 if (sin->sin_addr.s_addr == 1484 rsin->sin_addr.s_addr) { 1485 /* found it */ 1486 if (netp != NULL) { 1487 *netp = net; 1488 } 1489 if (locked_tcb == NULL) { 1490 SCTP_INP_DECR_REF(inp); 1491 } else if (locked_tcb != stcb) { 1492 SCTP_TCB_LOCK(locked_tcb); 1493 } 1494 if (locked_tcb) { 1495 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1496 } 1497 SCTP_INP_WUNLOCK(inp); 1498 SCTP_INP_INFO_RUNLOCK(); 1499 return (stcb); 1500 } 1501 break; 1502 } 1503 #endif 1504 #ifdef INET6 1505 case AF_INET6: 1506 { 1507 struct sockaddr_in6 *sin6, 1508 *rsin6; 1509 1510 sin6 = (struct sockaddr_in6 *) 1511 &net->ro._l_addr; 1512 rsin6 = (struct sockaddr_in6 *)remote; 1513 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1514 rsin6)) { 1515 /* found it */ 1516 if (netp != NULL) { 1517 *netp = net; 1518 } 1519 if (locked_tcb == NULL) { 1520 SCTP_INP_DECR_REF(inp); 1521 } else if (locked_tcb != stcb) { 1522 SCTP_TCB_LOCK(locked_tcb); 1523 } 1524 if (locked_tcb) { 1525 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1526 } 1527 SCTP_INP_WUNLOCK(inp); 1528 SCTP_INP_INFO_RUNLOCK(); 1529 return (stcb); 1530 } 1531 break; 1532 } 1533 #endif 1534 default: 1535 /* TSNH */ 1536 break; 1537 } 1538 } 1539 SCTP_TCB_UNLOCK(stcb); 1540 } 1541 } 1542 null_return: 1543 /* clean up for returning null */ 1544 if (locked_tcb) { 1545 SCTP_TCB_LOCK(locked_tcb); 1546 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1547 } 1548 SCTP_INP_WUNLOCK(inp); 1549 SCTP_INP_INFO_RUNLOCK(); 1550 /* not found */ 1551 return (NULL); 1552 } 1553 1554 1555 /* 1556 * Find an association for a specific endpoint using the association id given 1557 * out in the COMM_UP notification 1558 */ 1559 struct sctp_tcb * 1560 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1561 { 1562 /* 1563 * Use my the assoc_id to find a endpoint 1564 */ 1565 struct sctpasochead *head; 1566 struct sctp_tcb *stcb; 1567 uint32_t id; 1568 1569 if (inp == NULL) { 1570 SCTP_PRINTF("TSNH ep_associd\n"); 1571 return (NULL); 1572 } 1573 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1574 SCTP_PRINTF("TSNH ep_associd0\n"); 1575 return (NULL); 1576 } 1577 id = (uint32_t) asoc_id; 1578 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1579 if (head == NULL) { 1580 /* invalid id TSNH */ 1581 SCTP_PRINTF("TSNH ep_associd1\n"); 1582 return (NULL); 1583 } 1584 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1585 if (stcb->asoc.assoc_id == id) { 1586 if (inp != stcb->sctp_ep) { 1587 /* 1588 * some other guy has the same id active (id 1589 * collision ??). 1590 */ 1591 SCTP_PRINTF("TSNH ep_associd2\n"); 1592 continue; 1593 } 1594 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1595 continue; 1596 } 1597 if (want_lock) { 1598 SCTP_TCB_LOCK(stcb); 1599 } 1600 return (stcb); 1601 } 1602 } 1603 return (NULL); 1604 } 1605 1606 1607 struct sctp_tcb * 1608 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1609 { 1610 struct sctp_tcb *stcb; 1611 1612 SCTP_INP_RLOCK(inp); 1613 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1614 SCTP_INP_RUNLOCK(inp); 1615 return (stcb); 1616 } 1617 1618 1619 /* 1620 * Endpoint probe expects that the INP_INFO is locked. 1621 */ 1622 static struct sctp_inpcb * 1623 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1624 uint16_t lport, uint32_t vrf_id) 1625 { 1626 struct sctp_inpcb *inp; 1627 struct sctp_laddr *laddr; 1628 1629 #ifdef INET 1630 struct sockaddr_in *sin; 1631 1632 #endif 1633 #ifdef INET6 1634 struct sockaddr_in6 *sin6; 1635 struct sockaddr_in6 *intf_addr6; 1636 1637 #endif 1638 int fnd; 1639 1640 #ifdef INET 1641 sin = NULL; 1642 #endif 1643 #ifdef INET6 1644 sin6 = NULL; 1645 #endif 1646 switch (nam->sa_family) { 1647 #ifdef INET 1648 case AF_INET: 1649 sin = (struct sockaddr_in *)nam; 1650 break; 1651 #endif 1652 #ifdef INET6 1653 case AF_INET6: 1654 sin6 = (struct sockaddr_in6 *)nam; 1655 break; 1656 #endif 1657 default: 1658 /* unsupported family */ 1659 return (NULL); 1660 } 1661 1662 if (head == NULL) 1663 return (NULL); 1664 1665 LIST_FOREACH(inp, head, sctp_hash) { 1666 SCTP_INP_RLOCK(inp); 1667 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1668 SCTP_INP_RUNLOCK(inp); 1669 continue; 1670 } 1671 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1672 (inp->sctp_lport == lport)) { 1673 /* got it */ 1674 switch (nam->sa_family) { 1675 #ifdef INET 1676 case AF_INET: 1677 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1678 SCTP_IPV6_V6ONLY(inp)) { 1679 /* 1680 * IPv4 on a IPv6 socket with ONLY 1681 * IPv6 set 1682 */ 1683 SCTP_INP_RUNLOCK(inp); 1684 continue; 1685 } 1686 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1687 &sin->sin_addr) != 0) { 1688 SCTP_INP_RUNLOCK(inp); 1689 continue; 1690 } 1691 break; 1692 #endif 1693 #ifdef INET6 1694 case AF_INET6: 1695 /* 1696 * A V6 address and the endpoint is NOT 1697 * bound V6 1698 */ 1699 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1700 SCTP_INP_RUNLOCK(inp); 1701 continue; 1702 } 1703 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1704 &sin6->sin6_addr) != 0) { 1705 SCTP_INP_RUNLOCK(inp); 1706 continue; 1707 } 1708 break; 1709 #endif 1710 default: 1711 break; 1712 } 1713 /* does a VRF id match? */ 1714 fnd = 0; 1715 if (inp->def_vrf_id == vrf_id) 1716 fnd = 1; 1717 1718 SCTP_INP_RUNLOCK(inp); 1719 if (!fnd) 1720 continue; 1721 return (inp); 1722 } 1723 SCTP_INP_RUNLOCK(inp); 1724 } 1725 switch (nam->sa_family) { 1726 #ifdef INET 1727 case AF_INET: 1728 if (sin->sin_addr.s_addr == INADDR_ANY) { 1729 /* Can't hunt for one that has no address specified */ 1730 return (NULL); 1731 } 1732 break; 1733 #endif 1734 #ifdef INET6 1735 case AF_INET6: 1736 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1737 /* Can't hunt for one that has no address specified */ 1738 return (NULL); 1739 } 1740 break; 1741 #endif 1742 default: 1743 break; 1744 } 1745 /* 1746 * ok, not bound to all so see if we can find a EP bound to this 1747 * address. 1748 */ 1749 LIST_FOREACH(inp, head, sctp_hash) { 1750 SCTP_INP_RLOCK(inp); 1751 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1752 SCTP_INP_RUNLOCK(inp); 1753 continue; 1754 } 1755 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1756 SCTP_INP_RUNLOCK(inp); 1757 continue; 1758 } 1759 /* 1760 * Ok this could be a likely candidate, look at all of its 1761 * addresses 1762 */ 1763 if (inp->sctp_lport != lport) { 1764 SCTP_INP_RUNLOCK(inp); 1765 continue; 1766 } 1767 /* does a VRF id match? */ 1768 fnd = 0; 1769 if (inp->def_vrf_id == vrf_id) 1770 fnd = 1; 1771 1772 if (!fnd) { 1773 SCTP_INP_RUNLOCK(inp); 1774 continue; 1775 } 1776 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1777 if (laddr->ifa == NULL) { 1778 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1779 __FUNCTION__); 1780 continue; 1781 } 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1783 (void *)laddr->ifa); 1784 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1785 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1786 continue; 1787 } 1788 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1789 /* possible, see if it matches */ 1790 switch (nam->sa_family) { 1791 #ifdef INET 1792 case AF_INET: 1793 if (sin->sin_addr.s_addr == 1794 laddr->ifa->address.sin.sin_addr.s_addr) { 1795 SCTP_INP_RUNLOCK(inp); 1796 return (inp); 1797 } 1798 break; 1799 #endif 1800 #ifdef INET6 1801 case AF_INET6: 1802 intf_addr6 = &laddr->ifa->address.sin6; 1803 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1804 intf_addr6)) { 1805 SCTP_INP_RUNLOCK(inp); 1806 return (inp); 1807 } 1808 break; 1809 #endif 1810 } 1811 } 1812 } 1813 SCTP_INP_RUNLOCK(inp); 1814 } 1815 return (NULL); 1816 } 1817 1818 1819 static struct sctp_inpcb * 1820 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1821 { 1822 struct sctppcbhead *head; 1823 struct sctp_inpcb *t_inp; 1824 int fnd; 1825 1826 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1827 SCTP_BASE_INFO(hashmark))]; 1828 LIST_FOREACH(t_inp, head, sctp_hash) { 1829 if (t_inp->sctp_lport != lport) { 1830 continue; 1831 } 1832 /* is it in the VRF in question */ 1833 fnd = 0; 1834 if (t_inp->def_vrf_id == vrf_id) 1835 fnd = 1; 1836 if (!fnd) 1837 continue; 1838 1839 /* This one is in use. */ 1840 /* check the v6/v4 binding issue */ 1841 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1842 SCTP_IPV6_V6ONLY(t_inp)) { 1843 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1844 /* collision in V6 space */ 1845 return (t_inp); 1846 } else { 1847 /* inp is BOUND_V4 no conflict */ 1848 continue; 1849 } 1850 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1851 /* t_inp is bound v4 and v6, conflict always */ 1852 return (t_inp); 1853 } else { 1854 /* t_inp is bound only V4 */ 1855 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1856 SCTP_IPV6_V6ONLY(inp)) { 1857 /* no conflict */ 1858 continue; 1859 } 1860 /* else fall through to conflict */ 1861 } 1862 return (t_inp); 1863 } 1864 return (NULL); 1865 } 1866 1867 1868 int 1869 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1870 { 1871 /* For 1-2-1 with port reuse */ 1872 struct sctppcbhead *head; 1873 struct sctp_inpcb *tinp; 1874 1875 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1876 /* only works with port reuse on */ 1877 return (-1); 1878 } 1879 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1880 return (0); 1881 } 1882 SCTP_INP_RUNLOCK(inp); 1883 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1884 SCTP_BASE_INFO(hashmark))]; 1885 /* Kick out all non-listeners to the TCP hash */ 1886 LIST_FOREACH(tinp, head, sctp_hash) { 1887 if (tinp->sctp_lport != inp->sctp_lport) { 1888 continue; 1889 } 1890 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1891 continue; 1892 } 1893 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1894 continue; 1895 } 1896 if (tinp->sctp_socket->so_qlimit) { 1897 continue; 1898 } 1899 SCTP_INP_WLOCK(tinp); 1900 LIST_REMOVE(tinp, sctp_hash); 1901 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1902 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1903 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1904 SCTP_INP_WUNLOCK(tinp); 1905 } 1906 SCTP_INP_WLOCK(inp); 1907 /* Pull from where he was */ 1908 LIST_REMOVE(inp, sctp_hash); 1909 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1910 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1911 LIST_INSERT_HEAD(head, inp, sctp_hash); 1912 SCTP_INP_WUNLOCK(inp); 1913 SCTP_INP_RLOCK(inp); 1914 return (0); 1915 } 1916 1917 1918 struct sctp_inpcb * 1919 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1920 uint32_t vrf_id) 1921 { 1922 /* 1923 * First we check the hash table to see if someone has this port 1924 * bound with just the port. 1925 */ 1926 struct sctp_inpcb *inp; 1927 struct sctppcbhead *head; 1928 int lport; 1929 unsigned int i; 1930 1931 #ifdef INET 1932 struct sockaddr_in *sin; 1933 1934 #endif 1935 #ifdef INET6 1936 struct sockaddr_in6 *sin6; 1937 1938 #endif 1939 1940 switch (nam->sa_family) { 1941 #ifdef INET 1942 case AF_INET: 1943 sin = (struct sockaddr_in *)nam; 1944 lport = sin->sin_port; 1945 break; 1946 #endif 1947 #ifdef INET6 1948 case AF_INET6: 1949 sin6 = (struct sockaddr_in6 *)nam; 1950 lport = sin6->sin6_port; 1951 break; 1952 #endif 1953 default: 1954 return (NULL); 1955 } 1956 /* 1957 * I could cheat here and just cast to one of the types but we will 1958 * do it right. It also provides the check against an Unsupported 1959 * type too. 1960 */ 1961 /* Find the head of the ALLADDR chain */ 1962 if (have_lock == 0) { 1963 SCTP_INP_INFO_RLOCK(); 1964 } 1965 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1966 SCTP_BASE_INFO(hashmark))]; 1967 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1968 1969 /* 1970 * If the TCP model exists it could be that the main listening 1971 * endpoint is gone but there still exists a connected socket for 1972 * this guy. If so we can return the first one that we find. This 1973 * may NOT be the correct one so the caller should be wary on the 1974 * returned INP. Currently the only caller that sets find_tcp_pool 1975 * is in bindx where we are verifying that a user CAN bind the 1976 * address. He either has bound it already, or someone else has, or 1977 * its open to bind, so this is good enough. 1978 */ 1979 if (inp == NULL && find_tcp_pool) { 1980 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1981 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1982 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1983 if (inp) { 1984 break; 1985 } 1986 } 1987 } 1988 if (inp) { 1989 SCTP_INP_INCR_REF(inp); 1990 } 1991 if (have_lock == 0) { 1992 SCTP_INP_INFO_RUNLOCK(); 1993 } 1994 return (inp); 1995 } 1996 1997 1998 /* 1999 * Find an association for an endpoint with the pointer to whom you want to 2000 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2001 * need to change the *to to some other struct like a mbuf... 2002 */ 2003 struct sctp_tcb * 2004 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2005 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2006 uint32_t vrf_id) 2007 { 2008 struct sctp_inpcb *inp = NULL; 2009 struct sctp_tcb *stcb; 2010 2011 SCTP_INP_INFO_RLOCK(); 2012 if (find_tcp_pool) { 2013 if (inp_p != NULL) { 2014 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2015 vrf_id); 2016 } else { 2017 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2018 vrf_id); 2019 } 2020 if (stcb != NULL) { 2021 SCTP_INP_INFO_RUNLOCK(); 2022 return (stcb); 2023 } 2024 } 2025 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2026 if (inp_p != NULL) { 2027 *inp_p = inp; 2028 } 2029 SCTP_INP_INFO_RUNLOCK(); 2030 if (inp == NULL) { 2031 return (NULL); 2032 } 2033 /* 2034 * ok, we have an endpoint, now lets find the assoc for it (if any) 2035 * we now place the source address or from in the to of the find 2036 * endpoint call. Since in reality this chain is used from the 2037 * inbound packet side. 2038 */ 2039 if (inp_p != NULL) { 2040 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2041 NULL); 2042 } else { 2043 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2044 NULL); 2045 } 2046 return (stcb); 2047 } 2048 2049 2050 /* 2051 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2052 * find all addresses that the sender has specified in any address list. Each 2053 * address will be used to lookup the TCB and see if one exits. 2054 */ 2055 static struct sctp_tcb * 2056 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2057 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2058 struct sockaddr *dst) 2059 { 2060 struct sctp_paramhdr *phdr, parm_buf; 2061 2062 #if defined(INET) || defined(INET6) 2063 struct sctp_tcb *stcb; 2064 uint16_t ptype; 2065 2066 #endif 2067 uint16_t plen; 2068 2069 #ifdef INET 2070 struct sockaddr_in sin4; 2071 2072 #endif 2073 #ifdef INET6 2074 struct sockaddr_in6 sin6; 2075 2076 #endif 2077 2078 #ifdef INET 2079 memset(&sin4, 0, sizeof(sin4)); 2080 sin4.sin_len = sizeof(sin4); 2081 sin4.sin_family = AF_INET; 2082 sin4.sin_port = sh->src_port; 2083 #endif 2084 #ifdef INET6 2085 memset(&sin6, 0, sizeof(sin6)); 2086 sin6.sin6_len = sizeof(sin6); 2087 sin6.sin6_family = AF_INET6; 2088 sin6.sin6_port = sh->src_port; 2089 #endif 2090 2091 offset += sizeof(struct sctp_init_chunk); 2092 2093 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2094 while (phdr != NULL) { 2095 /* now we must see if we want the parameter */ 2096 #if defined(INET) || defined(INET6) 2097 ptype = ntohs(phdr->param_type); 2098 #endif 2099 plen = ntohs(phdr->param_length); 2100 if (plen == 0) { 2101 break; 2102 } 2103 #ifdef INET 2104 if (ptype == SCTP_IPV4_ADDRESS && 2105 plen == sizeof(struct sctp_ipv4addr_param)) { 2106 /* Get the rest of the address */ 2107 struct sctp_ipv4addr_param ip4_parm, *p4; 2108 2109 phdr = sctp_get_next_param(m, offset, 2110 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2111 if (phdr == NULL) { 2112 return (NULL); 2113 } 2114 p4 = (struct sctp_ipv4addr_param *)phdr; 2115 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2116 /* look it up */ 2117 stcb = sctp_findassociation_ep_addr(inp_p, 2118 (struct sockaddr *)&sin4, netp, dst, NULL); 2119 if (stcb != NULL) { 2120 return (stcb); 2121 } 2122 } 2123 #endif 2124 #ifdef INET6 2125 if (ptype == SCTP_IPV6_ADDRESS && 2126 plen == sizeof(struct sctp_ipv6addr_param)) { 2127 /* Get the rest of the address */ 2128 struct sctp_ipv6addr_param ip6_parm, *p6; 2129 2130 phdr = sctp_get_next_param(m, offset, 2131 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2132 if (phdr == NULL) { 2133 return (NULL); 2134 } 2135 p6 = (struct sctp_ipv6addr_param *)phdr; 2136 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2137 /* look it up */ 2138 stcb = sctp_findassociation_ep_addr(inp_p, 2139 (struct sockaddr *)&sin6, netp, dst, NULL); 2140 if (stcb != NULL) { 2141 return (stcb); 2142 } 2143 } 2144 #endif 2145 offset += SCTP_SIZE32(plen); 2146 phdr = sctp_get_next_param(m, offset, &parm_buf, 2147 sizeof(parm_buf)); 2148 } 2149 return (NULL); 2150 } 2151 2152 static struct sctp_tcb * 2153 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2154 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2155 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2156 { 2157 /* 2158 * Use my vtag to hash. If we find it we then verify the source addr 2159 * is in the assoc. If all goes well we save a bit on rec of a 2160 * packet. 2161 */ 2162 struct sctpasochead *head; 2163 struct sctp_nets *net; 2164 struct sctp_tcb *stcb; 2165 2166 SCTP_INP_INFO_RLOCK(); 2167 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2168 SCTP_BASE_INFO(hashasocmark))]; 2169 if (head == NULL) { 2170 /* invalid vtag */ 2171 SCTP_INP_INFO_RUNLOCK(); 2172 return (NULL); 2173 } 2174 LIST_FOREACH(stcb, head, sctp_asocs) { 2175 SCTP_INP_RLOCK(stcb->sctp_ep); 2176 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2177 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2178 continue; 2179 } 2180 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2181 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2182 continue; 2183 } 2184 SCTP_TCB_LOCK(stcb); 2185 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2186 if (stcb->asoc.my_vtag == vtag) { 2187 /* candidate */ 2188 if (stcb->rport != rport) { 2189 SCTP_TCB_UNLOCK(stcb); 2190 continue; 2191 } 2192 if (stcb->sctp_ep->sctp_lport != lport) { 2193 SCTP_TCB_UNLOCK(stcb); 2194 continue; 2195 } 2196 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 /* RRS:Need toaddr check here */ 2201 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2202 /* Endpoint does not own this address */ 2203 SCTP_TCB_UNLOCK(stcb); 2204 continue; 2205 } 2206 if (remote_tag) { 2207 /* 2208 * If we have both vtags that's all we match 2209 * on 2210 */ 2211 if (stcb->asoc.peer_vtag == remote_tag) { 2212 /* 2213 * If both tags match we consider it 2214 * conclusive and check NO 2215 * source/destination addresses 2216 */ 2217 goto conclusive; 2218 } 2219 } 2220 if (skip_src_check) { 2221 conclusive: 2222 if (from) { 2223 *netp = sctp_findnet(stcb, from); 2224 } else { 2225 *netp = NULL; /* unknown */ 2226 } 2227 if (inp_p) 2228 *inp_p = stcb->sctp_ep; 2229 SCTP_INP_INFO_RUNLOCK(); 2230 return (stcb); 2231 } 2232 net = sctp_findnet(stcb, from); 2233 if (net) { 2234 /* yep its him. */ 2235 *netp = net; 2236 SCTP_STAT_INCR(sctps_vtagexpress); 2237 *inp_p = stcb->sctp_ep; 2238 SCTP_INP_INFO_RUNLOCK(); 2239 return (stcb); 2240 } else { 2241 /* 2242 * not him, this should only happen in rare 2243 * cases so I peg it. 2244 */ 2245 SCTP_STAT_INCR(sctps_vtagbogus); 2246 } 2247 } 2248 SCTP_TCB_UNLOCK(stcb); 2249 } 2250 SCTP_INP_INFO_RUNLOCK(); 2251 return (NULL); 2252 } 2253 2254 2255 /* 2256 * Find an association with the pointer to the inbound IP packet. This can be 2257 * a IPv4 or IPv6 packet. 2258 */ 2259 struct sctp_tcb * 2260 sctp_findassociation_addr(struct mbuf *m, int offset, 2261 struct sockaddr *src, struct sockaddr *dst, 2262 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2263 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2264 { 2265 int find_tcp_pool; 2266 struct sctp_tcb *stcb; 2267 struct sctp_inpcb *inp; 2268 2269 if (sh->v_tag) { 2270 /* we only go down this path if vtag is non-zero */ 2271 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2272 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2273 if (stcb) { 2274 return (stcb); 2275 } 2276 } 2277 find_tcp_pool = 0; 2278 if ((ch->chunk_type != SCTP_INITIATION) && 2279 (ch->chunk_type != SCTP_INITIATION_ACK) && 2280 (ch->chunk_type != SCTP_COOKIE_ACK) && 2281 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2282 /* Other chunk types go to the tcp pool. */ 2283 find_tcp_pool = 1; 2284 } 2285 if (inp_p) { 2286 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2287 find_tcp_pool, vrf_id); 2288 inp = *inp_p; 2289 } else { 2290 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2291 find_tcp_pool, vrf_id); 2292 } 2293 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2294 if (stcb == NULL && inp) { 2295 /* Found a EP but not this address */ 2296 if ((ch->chunk_type == SCTP_INITIATION) || 2297 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2298 /*- 2299 * special hook, we do NOT return linp or an 2300 * association that is linked to an existing 2301 * association that is under the TCP pool (i.e. no 2302 * listener exists). The endpoint finding routine 2303 * will always find a listener before examining the 2304 * TCP pool. 2305 */ 2306 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2307 if (inp_p) { 2308 *inp_p = NULL; 2309 } 2310 return (NULL); 2311 } 2312 stcb = sctp_findassociation_special_addr(m, 2313 offset, sh, &inp, netp, dst); 2314 if (inp_p != NULL) { 2315 *inp_p = inp; 2316 } 2317 } 2318 } 2319 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2320 return (stcb); 2321 } 2322 2323 /* 2324 * lookup an association by an ASCONF lookup address. 2325 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2326 */ 2327 struct sctp_tcb * 2328 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2329 struct sockaddr *dst, struct sctphdr *sh, 2330 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2331 { 2332 struct sctp_tcb *stcb; 2333 union sctp_sockstore remote_store; 2334 struct sctp_paramhdr parm_buf, *phdr; 2335 int ptype; 2336 int zero_address = 0; 2337 2338 #ifdef INET 2339 struct sockaddr_in *sin; 2340 2341 #endif 2342 #ifdef INET6 2343 struct sockaddr_in6 *sin6; 2344 2345 #endif 2346 2347 memset(&remote_store, 0, sizeof(remote_store)); 2348 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2349 &parm_buf, sizeof(struct sctp_paramhdr)); 2350 if (phdr == NULL) { 2351 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2352 __FUNCTION__); 2353 return NULL; 2354 } 2355 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2356 /* get the correlation address */ 2357 switch (ptype) { 2358 #ifdef INET6 2359 case SCTP_IPV6_ADDRESS: 2360 { 2361 /* ipv6 address param */ 2362 struct sctp_ipv6addr_param *p6, p6_buf; 2363 2364 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2365 return NULL; 2366 } 2367 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2368 offset + sizeof(struct sctp_asconf_chunk), 2369 &p6_buf.ph, sizeof(*p6)); 2370 if (p6 == NULL) { 2371 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2372 __FUNCTION__); 2373 return (NULL); 2374 } 2375 sin6 = &remote_store.sin6; 2376 sin6->sin6_family = AF_INET6; 2377 sin6->sin6_len = sizeof(*sin6); 2378 sin6->sin6_port = sh->src_port; 2379 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2380 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2381 zero_address = 1; 2382 break; 2383 } 2384 #endif 2385 #ifdef INET 2386 case SCTP_IPV4_ADDRESS: 2387 { 2388 /* ipv4 address param */ 2389 struct sctp_ipv4addr_param *p4, p4_buf; 2390 2391 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2392 return NULL; 2393 } 2394 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2395 offset + sizeof(struct sctp_asconf_chunk), 2396 &p4_buf.ph, sizeof(*p4)); 2397 if (p4 == NULL) { 2398 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2399 __FUNCTION__); 2400 return (NULL); 2401 } 2402 sin = &remote_store.sin; 2403 sin->sin_family = AF_INET; 2404 sin->sin_len = sizeof(*sin); 2405 sin->sin_port = sh->src_port; 2406 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2407 if (sin->sin_addr.s_addr == INADDR_ANY) 2408 zero_address = 1; 2409 break; 2410 } 2411 #endif 2412 default: 2413 /* invalid address param type */ 2414 return NULL; 2415 } 2416 2417 if (zero_address) { 2418 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2419 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2420 if (stcb != NULL) { 2421 SCTP_INP_DECR_REF(*inp_p); 2422 } 2423 } else { 2424 stcb = sctp_findassociation_ep_addr(inp_p, 2425 &remote_store.sa, netp, 2426 dst, NULL); 2427 } 2428 return (stcb); 2429 } 2430 2431 2432 /* 2433 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2434 * addresses. This way if we don't get a bind we by default pick a ephemeral 2435 * port with all addresses bound. 2436 */ 2437 int 2438 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2439 { 2440 /* 2441 * we get called when a new endpoint starts up. We need to allocate 2442 * the sctp_inpcb structure from the zone and init it. Mark it as 2443 * unbound and find a port that we can use as an ephemeral with 2444 * INADDR_ANY. If the user binds later no problem we can then add in 2445 * the specific addresses. And setup the default parameters for the 2446 * EP. 2447 */ 2448 int i, error; 2449 struct sctp_inpcb *inp; 2450 struct sctp_pcb *m; 2451 struct timeval time; 2452 sctp_sharedkey_t *null_key; 2453 2454 error = 0; 2455 2456 SCTP_INP_INFO_WLOCK(); 2457 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2458 if (inp == NULL) { 2459 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2460 SCTP_INP_INFO_WUNLOCK(); 2461 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2462 return (ENOBUFS); 2463 } 2464 /* zap it */ 2465 bzero(inp, sizeof(*inp)); 2466 2467 /* bump generations */ 2468 /* setup socket pointers */ 2469 inp->sctp_socket = so; 2470 inp->ip_inp.inp.inp_socket = so; 2471 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2472 #ifdef INET6 2473 if (INP_SOCKAF(so) == AF_INET6) { 2474 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2475 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2476 } 2477 if (MODULE_GLOBAL(ip6_v6only)) { 2478 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2479 } 2480 } 2481 #endif 2482 inp->sctp_associd_counter = 1; 2483 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2484 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2485 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2486 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2487 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2488 inp->auth_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_auth_enable); 2489 inp->asconf_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_asconf_enable); 2490 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2491 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2492 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2493 /* init the small hash table we use to track asocid <-> tcb */ 2494 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2495 if (inp->sctp_asocidhash == NULL) { 2496 crfree(inp->ip_inp.inp.inp_cred); 2497 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2498 SCTP_INP_INFO_WUNLOCK(); 2499 return (ENOBUFS); 2500 } 2501 #ifdef IPSEC 2502 { 2503 struct inpcbpolicy *pcb_sp = NULL; 2504 2505 error = ipsec_init_policy(so, &pcb_sp); 2506 /* Arrange to share the policy */ 2507 inp->ip_inp.inp.inp_sp = pcb_sp; 2508 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2509 } 2510 if (error != 0) { 2511 crfree(inp->ip_inp.inp.inp_cred); 2512 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2513 SCTP_INP_INFO_WUNLOCK(); 2514 return error; 2515 } 2516 #endif /* IPSEC */ 2517 SCTP_INCR_EP_COUNT(); 2518 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2519 SCTP_INP_INFO_WUNLOCK(); 2520 2521 so->so_pcb = (caddr_t)inp; 2522 2523 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2524 /* UDP style socket */ 2525 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2526 SCTP_PCB_FLAGS_UNBOUND); 2527 /* Be sure it is NON-BLOCKING IO for UDP */ 2528 /* SCTP_SET_SO_NBIO(so); */ 2529 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2530 /* TCP style socket */ 2531 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2532 SCTP_PCB_FLAGS_UNBOUND); 2533 /* Be sure we have blocking IO by default */ 2534 SCTP_CLEAR_SO_NBIO(so); 2535 } else { 2536 /* 2537 * unsupported socket type (RAW, etc)- in case we missed it 2538 * in protosw 2539 */ 2540 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2541 so->so_pcb = NULL; 2542 crfree(inp->ip_inp.inp.inp_cred); 2543 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2544 return (EOPNOTSUPP); 2545 } 2546 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2547 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2548 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2549 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2550 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2551 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2552 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2553 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2554 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2555 } 2556 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2557 &inp->sctp_hashmark); 2558 if (inp->sctp_tcbhash == NULL) { 2559 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2560 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2561 so->so_pcb = NULL; 2562 crfree(inp->ip_inp.inp.inp_cred); 2563 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2564 return (ENOBUFS); 2565 } 2566 inp->def_vrf_id = vrf_id; 2567 2568 SCTP_INP_INFO_WLOCK(); 2569 SCTP_INP_LOCK_INIT(inp); 2570 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2571 SCTP_INP_READ_INIT(inp); 2572 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2573 /* lock the new ep */ 2574 SCTP_INP_WLOCK(inp); 2575 2576 /* add it to the info area */ 2577 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2578 SCTP_INP_INFO_WUNLOCK(); 2579 2580 TAILQ_INIT(&inp->read_queue); 2581 LIST_INIT(&inp->sctp_addr_list); 2582 2583 LIST_INIT(&inp->sctp_asoc_list); 2584 2585 #ifdef SCTP_TRACK_FREED_ASOCS 2586 /* TEMP CODE */ 2587 LIST_INIT(&inp->sctp_asoc_free_list); 2588 #endif 2589 /* Init the timer structure for signature change */ 2590 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2591 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2592 2593 /* now init the actual endpoint default data */ 2594 m = &inp->sctp_ep; 2595 2596 /* setup the base timeout information */ 2597 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2598 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2599 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2600 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2601 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2602 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2603 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2604 /* all max/min max are in ms */ 2605 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2606 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2607 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2608 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2609 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2610 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2611 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2612 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2613 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2614 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2615 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2616 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2617 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2618 2619 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2620 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2621 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2622 /* number of streams to pre-open on a association */ 2623 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2624 2625 /* Add adaptation cookie */ 2626 m->adaptation_layer_indicator = 0; 2627 m->adaptation_layer_indicator_provided = 0; 2628 2629 /* seed random number generator */ 2630 m->random_counter = 1; 2631 m->store_at = SCTP_SIGNATURE_SIZE; 2632 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2633 sctp_fill_random_store(m); 2634 2635 /* Minimum cookie size */ 2636 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2637 sizeof(struct sctp_state_cookie); 2638 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2639 2640 /* Setup the initial secret */ 2641 (void)SCTP_GETTIME_TIMEVAL(&time); 2642 m->time_of_secret_change = time.tv_sec; 2643 2644 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2645 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2646 } 2647 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2648 2649 /* How long is a cookie good for ? */ 2650 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2651 /* 2652 * Initialize authentication parameters 2653 */ 2654 m->local_hmacs = sctp_default_supported_hmaclist(); 2655 m->local_auth_chunks = sctp_alloc_chunklist(); 2656 if (inp->asconf_supported) { 2657 sctp_auth_add_chunk(SCTP_ASCONF, m->local_auth_chunks); 2658 sctp_auth_add_chunk(SCTP_ASCONF_ACK, m->local_auth_chunks); 2659 } 2660 m->default_dscp = 0; 2661 #ifdef INET6 2662 m->default_flowlabel = 0; 2663 #endif 2664 m->port = 0; /* encapsulation disabled by default */ 2665 LIST_INIT(&m->shared_keys); 2666 /* add default NULL key as key id 0 */ 2667 null_key = sctp_alloc_sharedkey(); 2668 sctp_insert_sharedkey(&m->shared_keys, null_key); 2669 SCTP_INP_WUNLOCK(inp); 2670 #ifdef SCTP_LOG_CLOSING 2671 sctp_log_closing(inp, NULL, 12); 2672 #endif 2673 return (error); 2674 } 2675 2676 2677 void 2678 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2679 struct sctp_tcb *stcb) 2680 { 2681 struct sctp_nets *net; 2682 uint16_t lport, rport; 2683 struct sctppcbhead *head; 2684 struct sctp_laddr *laddr, *oladdr; 2685 2686 atomic_add_int(&stcb->asoc.refcnt, 1); 2687 SCTP_TCB_UNLOCK(stcb); 2688 SCTP_INP_INFO_WLOCK(); 2689 SCTP_INP_WLOCK(old_inp); 2690 SCTP_INP_WLOCK(new_inp); 2691 SCTP_TCB_LOCK(stcb); 2692 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2693 2694 new_inp->sctp_ep.time_of_secret_change = 2695 old_inp->sctp_ep.time_of_secret_change; 2696 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2697 sizeof(old_inp->sctp_ep.secret_key)); 2698 new_inp->sctp_ep.current_secret_number = 2699 old_inp->sctp_ep.current_secret_number; 2700 new_inp->sctp_ep.last_secret_number = 2701 old_inp->sctp_ep.last_secret_number; 2702 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2703 2704 /* make it so new data pours into the new socket */ 2705 stcb->sctp_socket = new_inp->sctp_socket; 2706 stcb->sctp_ep = new_inp; 2707 2708 /* Copy the port across */ 2709 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2710 rport = stcb->rport; 2711 /* Pull the tcb from the old association */ 2712 LIST_REMOVE(stcb, sctp_tcbhash); 2713 LIST_REMOVE(stcb, sctp_tcblist); 2714 if (stcb->asoc.in_asocid_hash) { 2715 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2716 } 2717 /* Now insert the new_inp into the TCP connected hash */ 2718 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2719 2720 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2721 /* Its safe to access */ 2722 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2723 2724 /* Now move the tcb into the endpoint list */ 2725 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2726 /* 2727 * Question, do we even need to worry about the ep-hash since we 2728 * only have one connection? Probably not :> so lets get rid of it 2729 * and not suck up any kernel memory in that. 2730 */ 2731 if (stcb->asoc.in_asocid_hash) { 2732 struct sctpasochead *lhd; 2733 2734 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2735 new_inp->hashasocidmark)]; 2736 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2737 } 2738 /* Ok. Let's restart timer. */ 2739 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2740 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2741 stcb, net); 2742 } 2743 2744 SCTP_INP_INFO_WUNLOCK(); 2745 if (new_inp->sctp_tcbhash != NULL) { 2746 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2747 new_inp->sctp_tcbhash = NULL; 2748 } 2749 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2750 /* Subset bound, so copy in the laddr list from the old_inp */ 2751 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2752 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2753 if (laddr == NULL) { 2754 /* 2755 * Gak, what can we do? This assoc is really 2756 * HOSED. We probably should send an abort 2757 * here. 2758 */ 2759 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2760 continue; 2761 } 2762 SCTP_INCR_LADDR_COUNT(); 2763 bzero(laddr, sizeof(*laddr)); 2764 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2765 laddr->ifa = oladdr->ifa; 2766 atomic_add_int(&laddr->ifa->refcount, 1); 2767 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2768 sctp_nxt_addr); 2769 new_inp->laddr_count++; 2770 if (oladdr == stcb->asoc.last_used_address) { 2771 stcb->asoc.last_used_address = laddr; 2772 } 2773 } 2774 } 2775 /* 2776 * Now any running timers need to be adjusted since we really don't 2777 * care if they are running or not just blast in the new_inp into 2778 * all of them. 2779 */ 2780 2781 stcb->asoc.dack_timer.ep = (void *)new_inp; 2782 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2783 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2784 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2785 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2786 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2787 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2788 /* now what about the nets? */ 2789 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2790 net->pmtu_timer.ep = (void *)new_inp; 2791 net->hb_timer.ep = (void *)new_inp; 2792 net->rxt_timer.ep = (void *)new_inp; 2793 } 2794 SCTP_INP_WUNLOCK(new_inp); 2795 SCTP_INP_WUNLOCK(old_inp); 2796 } 2797 2798 2799 2800 2801 /* sctp_ifap is used to bypass normal local address validation checks */ 2802 int 2803 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2804 struct sctp_ifa *sctp_ifap, struct thread *p) 2805 { 2806 /* bind a ep to a socket address */ 2807 struct sctppcbhead *head; 2808 struct sctp_inpcb *inp, *inp_tmp; 2809 struct inpcb *ip_inp; 2810 int port_reuse_active = 0; 2811 int bindall; 2812 uint16_t lport; 2813 int error; 2814 uint32_t vrf_id; 2815 2816 lport = 0; 2817 bindall = 1; 2818 inp = (struct sctp_inpcb *)so->so_pcb; 2819 ip_inp = (struct inpcb *)so->so_pcb; 2820 #ifdef SCTP_DEBUG 2821 if (addr) { 2822 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2823 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2824 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2825 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2826 } 2827 #endif 2828 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2829 /* already did a bind, subsequent binds NOT allowed ! */ 2830 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2831 return (EINVAL); 2832 } 2833 #ifdef INVARIANTS 2834 if (p == NULL) 2835 panic("null proc/thread"); 2836 #endif 2837 if (addr != NULL) { 2838 switch (addr->sa_family) { 2839 #ifdef INET 2840 case AF_INET: 2841 { 2842 struct sockaddr_in *sin; 2843 2844 /* IPV6_V6ONLY socket? */ 2845 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2846 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2847 return (EINVAL); 2848 } 2849 if (addr->sa_len != sizeof(*sin)) { 2850 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2851 return (EINVAL); 2852 } 2853 sin = (struct sockaddr_in *)addr; 2854 lport = sin->sin_port; 2855 /* 2856 * For LOOPBACK the prison_local_ip4() call 2857 * will transmute the ip address to the 2858 * proper value. 2859 */ 2860 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2861 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2862 return (error); 2863 } 2864 if (sin->sin_addr.s_addr != INADDR_ANY) { 2865 bindall = 0; 2866 } 2867 break; 2868 } 2869 #endif 2870 #ifdef INET6 2871 case AF_INET6: 2872 { 2873 /* 2874 * Only for pure IPv6 Address. (No IPv4 2875 * Mapped!) 2876 */ 2877 struct sockaddr_in6 *sin6; 2878 2879 sin6 = (struct sockaddr_in6 *)addr; 2880 2881 if (addr->sa_len != sizeof(*sin6)) { 2882 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2883 return (EINVAL); 2884 } 2885 lport = sin6->sin6_port; 2886 /* 2887 * For LOOPBACK the prison_local_ip6() call 2888 * will transmute the ipv6 address to the 2889 * proper value. 2890 */ 2891 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2892 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2893 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2894 return (error); 2895 } 2896 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2897 bindall = 0; 2898 /* KAME hack: embed scopeid */ 2899 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2900 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2901 return (EINVAL); 2902 } 2903 } 2904 /* this must be cleared for ifa_ifwithaddr() */ 2905 sin6->sin6_scope_id = 0; 2906 break; 2907 } 2908 #endif 2909 default: 2910 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2911 return (EAFNOSUPPORT); 2912 } 2913 } 2914 SCTP_INP_INFO_WLOCK(); 2915 SCTP_INP_WLOCK(inp); 2916 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2917 vrf_id = inp->def_vrf_id; 2918 2919 /* increase our count due to the unlock we do */ 2920 SCTP_INP_INCR_REF(inp); 2921 if (lport) { 2922 /* 2923 * Did the caller specify a port? if so we must see if an ep 2924 * already has this one bound. 2925 */ 2926 /* got to be root to get at low ports */ 2927 if (ntohs(lport) < IPPORT_RESERVED) { 2928 if (p && (error = 2929 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2930 )) { 2931 SCTP_INP_DECR_REF(inp); 2932 SCTP_INP_WUNLOCK(inp); 2933 SCTP_INP_INFO_WUNLOCK(); 2934 return (error); 2935 } 2936 } 2937 SCTP_INP_WUNLOCK(inp); 2938 if (bindall) { 2939 vrf_id = inp->def_vrf_id; 2940 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2941 if (inp_tmp != NULL) { 2942 /* 2943 * lock guy returned and lower count note 2944 * that we are not bound so inp_tmp should 2945 * NEVER be inp. And it is this inp 2946 * (inp_tmp) that gets the reference bump, 2947 * so we must lower it. 2948 */ 2949 SCTP_INP_DECR_REF(inp_tmp); 2950 /* unlock info */ 2951 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2952 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2953 /* 2954 * Ok, must be one-2-one and 2955 * allowing port re-use 2956 */ 2957 port_reuse_active = 1; 2958 goto continue_anyway; 2959 } 2960 SCTP_INP_DECR_REF(inp); 2961 SCTP_INP_INFO_WUNLOCK(); 2962 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2963 return (EADDRINUSE); 2964 } 2965 } else { 2966 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2967 if (inp_tmp != NULL) { 2968 /* 2969 * lock guy returned and lower count note 2970 * that we are not bound so inp_tmp should 2971 * NEVER be inp. And it is this inp 2972 * (inp_tmp) that gets the reference bump, 2973 * so we must lower it. 2974 */ 2975 SCTP_INP_DECR_REF(inp_tmp); 2976 /* unlock info */ 2977 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2978 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2979 /* 2980 * Ok, must be one-2-one and 2981 * allowing port re-use 2982 */ 2983 port_reuse_active = 1; 2984 goto continue_anyway; 2985 } 2986 SCTP_INP_DECR_REF(inp); 2987 SCTP_INP_INFO_WUNLOCK(); 2988 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2989 return (EADDRINUSE); 2990 } 2991 } 2992 continue_anyway: 2993 SCTP_INP_WLOCK(inp); 2994 if (bindall) { 2995 /* verify that no lport is not used by a singleton */ 2996 if ((port_reuse_active == 0) && 2997 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2998 /* Sorry someone already has this one bound */ 2999 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 3000 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 3001 port_reuse_active = 1; 3002 } else { 3003 SCTP_INP_DECR_REF(inp); 3004 SCTP_INP_WUNLOCK(inp); 3005 SCTP_INP_INFO_WUNLOCK(); 3006 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3007 return (EADDRINUSE); 3008 } 3009 } 3010 } 3011 } else { 3012 uint16_t first, last, candidate; 3013 uint16_t count; 3014 int done; 3015 3016 if (ip_inp->inp_flags & INP_HIGHPORT) { 3017 first = MODULE_GLOBAL(ipport_hifirstauto); 3018 last = MODULE_GLOBAL(ipport_hilastauto); 3019 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3020 if (p && (error = 3021 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3022 )) { 3023 SCTP_INP_DECR_REF(inp); 3024 SCTP_INP_WUNLOCK(inp); 3025 SCTP_INP_INFO_WUNLOCK(); 3026 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3027 return (error); 3028 } 3029 first = MODULE_GLOBAL(ipport_lowfirstauto); 3030 last = MODULE_GLOBAL(ipport_lowlastauto); 3031 } else { 3032 first = MODULE_GLOBAL(ipport_firstauto); 3033 last = MODULE_GLOBAL(ipport_lastauto); 3034 } 3035 if (first > last) { 3036 uint16_t temp; 3037 3038 temp = first; 3039 first = last; 3040 last = temp; 3041 } 3042 count = last - first + 1; /* number of candidates */ 3043 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3044 3045 done = 0; 3046 while (!done) { 3047 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3048 done = 1; 3049 } 3050 if (!done) { 3051 if (--count == 0) { 3052 SCTP_INP_DECR_REF(inp); 3053 SCTP_INP_WUNLOCK(inp); 3054 SCTP_INP_INFO_WUNLOCK(); 3055 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3056 return (EADDRINUSE); 3057 } 3058 if (candidate == last) 3059 candidate = first; 3060 else 3061 candidate = candidate + 1; 3062 } 3063 } 3064 lport = htons(candidate); 3065 } 3066 SCTP_INP_DECR_REF(inp); 3067 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3068 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3069 /* 3070 * this really should not happen. The guy did a non-blocking 3071 * bind and then did a close at the same time. 3072 */ 3073 SCTP_INP_WUNLOCK(inp); 3074 SCTP_INP_INFO_WUNLOCK(); 3075 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3076 return (EINVAL); 3077 } 3078 /* ok we look clear to give out this port, so lets setup the binding */ 3079 if (bindall) { 3080 /* binding to all addresses, so just set in the proper flags */ 3081 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3082 /* set the automatic addr changes from kernel flag */ 3083 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3084 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3085 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3086 } else { 3087 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3088 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3089 } 3090 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3091 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3092 } else { 3093 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3094 } 3095 /* 3096 * set the automatic mobility_base from kernel flag (by 3097 * micchie) 3098 */ 3099 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3100 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3101 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3102 } else { 3103 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3104 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3105 } 3106 /* 3107 * set the automatic mobility_fasthandoff from kernel flag 3108 * (by micchie) 3109 */ 3110 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3111 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3112 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3113 } else { 3114 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3115 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3116 } 3117 } else { 3118 /* 3119 * bind specific, make sure flags is off and add a new 3120 * address structure to the sctp_addr_list inside the ep 3121 * structure. 3122 * 3123 * We will need to allocate one and insert it at the head. The 3124 * socketopt call can just insert new addresses in there as 3125 * well. It will also have to do the embed scope kame hack 3126 * too (before adding). 3127 */ 3128 struct sctp_ifa *ifa; 3129 union sctp_sockstore store; 3130 3131 memset(&store, 0, sizeof(store)); 3132 switch (addr->sa_family) { 3133 #ifdef INET 3134 case AF_INET: 3135 memcpy(&store.sin, addr, sizeof(struct sockaddr_in)); 3136 store.sin.sin_port = 0; 3137 break; 3138 #endif 3139 #ifdef INET6 3140 case AF_INET6: 3141 memcpy(&store.sin6, addr, sizeof(struct sockaddr_in6)); 3142 store.sin6.sin6_port = 0; 3143 break; 3144 #endif 3145 default: 3146 break; 3147 } 3148 /* 3149 * first find the interface with the bound address need to 3150 * zero out the port to find the address! yuck! can't do 3151 * this earlier since need port for sctp_pcb_findep() 3152 */ 3153 if (sctp_ifap != NULL) { 3154 ifa = sctp_ifap; 3155 } else { 3156 /* 3157 * Note for BSD we hit here always other O/S's will 3158 * pass things in via the sctp_ifap argument 3159 * (Panda). 3160 */ 3161 ifa = sctp_find_ifa_by_addr(&store.sa, 3162 vrf_id, SCTP_ADDR_NOT_LOCKED); 3163 } 3164 if (ifa == NULL) { 3165 /* Can't find an interface with that address */ 3166 SCTP_INP_WUNLOCK(inp); 3167 SCTP_INP_INFO_WUNLOCK(); 3168 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3169 return (EADDRNOTAVAIL); 3170 } 3171 #ifdef INET6 3172 if (addr->sa_family == AF_INET6) { 3173 /* GAK, more FIXME IFA lock? */ 3174 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3175 /* Can't bind a non-existent addr. */ 3176 SCTP_INP_WUNLOCK(inp); 3177 SCTP_INP_INFO_WUNLOCK(); 3178 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3179 return (EINVAL); 3180 } 3181 } 3182 #endif 3183 /* we're not bound all */ 3184 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3185 /* allow bindx() to send ASCONF's for binding changes */ 3186 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3187 /* clear automatic addr changes from kernel flag */ 3188 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3189 3190 /* add this address to the endpoint list */ 3191 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3192 if (error != 0) { 3193 SCTP_INP_WUNLOCK(inp); 3194 SCTP_INP_INFO_WUNLOCK(); 3195 return (error); 3196 } 3197 inp->laddr_count++; 3198 } 3199 /* find the bucket */ 3200 if (port_reuse_active) { 3201 /* Put it into tcp 1-2-1 hash */ 3202 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3203 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3204 } else { 3205 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3206 } 3207 /* put it in the bucket */ 3208 LIST_INSERT_HEAD(head, inp, sctp_hash); 3209 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3210 (void *)head, ntohs(lport), port_reuse_active); 3211 /* set in the port */ 3212 inp->sctp_lport = lport; 3213 3214 /* turn off just the unbound flag */ 3215 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3216 SCTP_INP_WUNLOCK(inp); 3217 SCTP_INP_INFO_WUNLOCK(); 3218 return (0); 3219 } 3220 3221 3222 static void 3223 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3224 { 3225 struct sctp_iterator *it, *nit; 3226 3227 /* 3228 * We enter with the only the ITERATOR_LOCK in place and a write 3229 * lock on the inp_info stuff. 3230 */ 3231 it = sctp_it_ctl.cur_it; 3232 if (it && (it->vn != curvnet)) { 3233 /* Its not looking at our VNET */ 3234 return; 3235 } 3236 if (it && (it->inp == inp)) { 3237 /* 3238 * This is tricky and we hold the iterator lock, but when it 3239 * returns and gets the lock (when we release it) the 3240 * iterator will try to operate on inp. We need to stop that 3241 * from happening. But of course the iterator has a 3242 * reference on the stcb and inp. We can mark it and it will 3243 * stop. 3244 * 3245 * If its a single iterator situation, we set the end iterator 3246 * flag. Otherwise we set the iterator to go to the next 3247 * inp. 3248 * 3249 */ 3250 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3251 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3252 } else { 3253 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3254 } 3255 } 3256 /* 3257 * Now go through and remove any single reference to our inp that 3258 * may be still pending on the list 3259 */ 3260 SCTP_IPI_ITERATOR_WQ_LOCK(); 3261 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3262 if (it->vn != curvnet) { 3263 continue; 3264 } 3265 if (it->inp == inp) { 3266 /* This one points to me is it inp specific? */ 3267 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3268 /* Remove and free this one */ 3269 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3270 it, sctp_nxt_itr); 3271 if (it->function_atend != NULL) { 3272 (*it->function_atend) (it->pointer, it->val); 3273 } 3274 SCTP_FREE(it, SCTP_M_ITER); 3275 } else { 3276 it->inp = LIST_NEXT(it->inp, sctp_list); 3277 if (it->inp) { 3278 SCTP_INP_INCR_REF(it->inp); 3279 } 3280 } 3281 /* 3282 * When its put in the refcnt is incremented so decr 3283 * it 3284 */ 3285 SCTP_INP_DECR_REF(inp); 3286 } 3287 } 3288 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3289 } 3290 3291 /* release sctp_inpcb unbind the port */ 3292 void 3293 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3294 { 3295 /* 3296 * Here we free a endpoint. We must find it (if it is in the Hash 3297 * table) and remove it from there. Then we must also find it in the 3298 * overall list and remove it from there. After all removals are 3299 * complete then any timer has to be stopped. Then start the actual 3300 * freeing. a) Any local lists. b) Any associations. c) The hash of 3301 * all associations. d) finally the ep itself. 3302 */ 3303 struct sctp_tcb *asoc, *nasoc; 3304 struct sctp_laddr *laddr, *nladdr; 3305 struct inpcb *ip_pcb; 3306 struct socket *so; 3307 int being_refed = 0; 3308 struct sctp_queued_to_read *sq, *nsq; 3309 int cnt; 3310 sctp_sharedkey_t *shared_key, *nshared_key; 3311 3312 3313 #ifdef SCTP_LOG_CLOSING 3314 sctp_log_closing(inp, NULL, 0); 3315 #endif 3316 SCTP_ITERATOR_LOCK(); 3317 /* mark any iterators on the list or being processed */ 3318 sctp_iterator_inp_being_freed(inp); 3319 SCTP_ITERATOR_UNLOCK(); 3320 so = inp->sctp_socket; 3321 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3322 /* been here before.. eeks.. get out of here */ 3323 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3324 #ifdef SCTP_LOG_CLOSING 3325 sctp_log_closing(inp, NULL, 1); 3326 #endif 3327 return; 3328 } 3329 SCTP_ASOC_CREATE_LOCK(inp); 3330 SCTP_INP_INFO_WLOCK(); 3331 3332 SCTP_INP_WLOCK(inp); 3333 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3334 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3335 /* socket is gone, so no more wakeups allowed */ 3336 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3337 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3338 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3339 3340 } 3341 /* First time through we have the socket lock, after that no more. */ 3342 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3343 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3344 3345 if (inp->control) { 3346 sctp_m_freem(inp->control); 3347 inp->control = NULL; 3348 } 3349 if (inp->pkt) { 3350 sctp_m_freem(inp->pkt); 3351 inp->pkt = NULL; 3352 } 3353 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3354 * here but I will be nice :> (i.e. 3355 * ip_pcb = ep;) */ 3356 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3357 int cnt_in_sd; 3358 3359 cnt_in_sd = 0; 3360 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3361 SCTP_TCB_LOCK(asoc); 3362 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3363 /* Skip guys being freed */ 3364 cnt_in_sd++; 3365 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3366 /* 3367 * Special case - we did not start a 3368 * kill timer on the asoc due to it 3369 * was not closed. So go ahead and 3370 * start it now. 3371 */ 3372 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3373 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3374 } 3375 SCTP_TCB_UNLOCK(asoc); 3376 continue; 3377 } 3378 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3379 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3380 (asoc->asoc.total_output_queue_size == 0)) { 3381 /* 3382 * If we have data in queue, we don't want 3383 * to just free since the app may have done, 3384 * send()/close or connect/send/close. And 3385 * it wants the data to get across first. 3386 */ 3387 /* Just abandon things in the front states */ 3388 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3389 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3390 cnt_in_sd++; 3391 } 3392 continue; 3393 } 3394 /* Disconnect the socket please */ 3395 asoc->sctp_socket = NULL; 3396 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3397 if ((asoc->asoc.size_on_reasm_queue > 0) || 3398 (asoc->asoc.control_pdapi) || 3399 (asoc->asoc.size_on_all_streams > 0) || 3400 (so && (so->so_rcv.sb_cc > 0))) { 3401 /* Left with Data unread */ 3402 struct mbuf *op_err; 3403 3404 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3405 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3406 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3407 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3408 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3409 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3410 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3411 } 3412 if (sctp_free_assoc(inp, asoc, 3413 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3414 cnt_in_sd++; 3415 } 3416 continue; 3417 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3418 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3419 (asoc->asoc.stream_queue_cnt == 0)) { 3420 if (asoc->asoc.locked_on_sending) { 3421 goto abort_anyway; 3422 } 3423 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3424 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3425 struct sctp_nets *netp; 3426 3427 /* 3428 * there is nothing queued to send, 3429 * so I send shutdown 3430 */ 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 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3436 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3437 sctp_stop_timers_for_shutdown(asoc); 3438 if (asoc->asoc.alternate) { 3439 netp = asoc->asoc.alternate; 3440 } else { 3441 netp = asoc->asoc.primary_destination; 3442 } 3443 sctp_send_shutdown(asoc, netp); 3444 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3445 netp); 3446 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3447 asoc->asoc.primary_destination); 3448 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3449 } 3450 } else { 3451 /* mark into shutdown pending */ 3452 struct sctp_stream_queue_pending *sp; 3453 3454 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3455 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3456 asoc->asoc.primary_destination); 3457 if (asoc->asoc.locked_on_sending) { 3458 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3459 sctp_streamhead); 3460 if (sp == NULL) { 3461 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3462 (void *)asoc->asoc.locked_on_sending, 3463 asoc->asoc.locked_on_sending->stream_no); 3464 } else { 3465 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3466 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3467 } 3468 } 3469 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3470 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3471 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3472 struct mbuf *op_err; 3473 3474 abort_anyway: 3475 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3476 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3477 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3478 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3479 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3480 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3481 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3482 } 3483 if (sctp_free_assoc(inp, asoc, 3484 SCTP_PCBFREE_NOFORCE, 3485 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3486 cnt_in_sd++; 3487 } 3488 continue; 3489 } else { 3490 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3491 } 3492 } 3493 cnt_in_sd++; 3494 SCTP_TCB_UNLOCK(asoc); 3495 } 3496 /* now is there some left in our SHUTDOWN state? */ 3497 if (cnt_in_sd) { 3498 #ifdef SCTP_LOG_CLOSING 3499 sctp_log_closing(inp, NULL, 2); 3500 #endif 3501 inp->sctp_socket = NULL; 3502 SCTP_INP_WUNLOCK(inp); 3503 SCTP_ASOC_CREATE_UNLOCK(inp); 3504 SCTP_INP_INFO_WUNLOCK(); 3505 return; 3506 } 3507 } 3508 inp->sctp_socket = NULL; 3509 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3510 SCTP_PCB_FLAGS_UNBOUND) { 3511 /* 3512 * ok, this guy has been bound. It's port is somewhere in 3513 * the SCTP_BASE_INFO(hash table). Remove it! 3514 */ 3515 LIST_REMOVE(inp, sctp_hash); 3516 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3517 } 3518 /* 3519 * If there is a timer running to kill us, forget it, since it may 3520 * have a contest on the INP lock.. which would cause us to die ... 3521 */ 3522 cnt = 0; 3523 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3524 SCTP_TCB_LOCK(asoc); 3525 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3526 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3527 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3528 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3529 } 3530 cnt++; 3531 SCTP_TCB_UNLOCK(asoc); 3532 continue; 3533 } 3534 /* Free associations that are NOT killing us */ 3535 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3536 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3537 struct mbuf *op_err; 3538 3539 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3540 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3541 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3542 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3543 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3544 cnt++; 3545 SCTP_TCB_UNLOCK(asoc); 3546 continue; 3547 } 3548 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3549 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3550 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3551 } 3552 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3553 cnt++; 3554 } 3555 } 3556 if (cnt) { 3557 /* Ok we have someone out there that will kill us */ 3558 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3559 #ifdef SCTP_LOG_CLOSING 3560 sctp_log_closing(inp, NULL, 3); 3561 #endif 3562 SCTP_INP_WUNLOCK(inp); 3563 SCTP_ASOC_CREATE_UNLOCK(inp); 3564 SCTP_INP_INFO_WUNLOCK(); 3565 return; 3566 } 3567 if (SCTP_INP_LOCK_CONTENDED(inp)) 3568 being_refed++; 3569 if (SCTP_INP_READ_CONTENDED(inp)) 3570 being_refed++; 3571 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3572 being_refed++; 3573 3574 if ((inp->refcount) || 3575 (being_refed) || 3576 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3577 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3578 #ifdef SCTP_LOG_CLOSING 3579 sctp_log_closing(inp, NULL, 4); 3580 #endif 3581 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3582 SCTP_INP_WUNLOCK(inp); 3583 SCTP_ASOC_CREATE_UNLOCK(inp); 3584 SCTP_INP_INFO_WUNLOCK(); 3585 return; 3586 } 3587 inp->sctp_ep.signature_change.type = 0; 3588 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3589 /* 3590 * Remove it from the list .. last thing we need a lock for. 3591 */ 3592 LIST_REMOVE(inp, sctp_list); 3593 SCTP_INP_WUNLOCK(inp); 3594 SCTP_ASOC_CREATE_UNLOCK(inp); 3595 SCTP_INP_INFO_WUNLOCK(); 3596 /* 3597 * Now we release all locks. Since this INP cannot be found anymore 3598 * except possibly by the kill timer that might be running. We call 3599 * the drain function here. It should hit the case were it sees the 3600 * ACTIVE flag cleared and exit out freeing us to proceed and 3601 * destroy everything. 3602 */ 3603 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3604 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3605 } else { 3606 /* Probably un-needed */ 3607 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3608 } 3609 3610 #ifdef SCTP_LOG_CLOSING 3611 sctp_log_closing(inp, NULL, 5); 3612 #endif 3613 3614 3615 if ((inp->sctp_asocidhash) != NULL) { 3616 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3617 inp->sctp_asocidhash = NULL; 3618 } 3619 /* sa_ignore FREED_MEMORY */ 3620 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3621 /* Its only abandoned if it had data left */ 3622 if (sq->length) 3623 SCTP_STAT_INCR(sctps_left_abandon); 3624 3625 TAILQ_REMOVE(&inp->read_queue, sq, next); 3626 sctp_free_remote_addr(sq->whoFrom); 3627 if (so) 3628 so->so_rcv.sb_cc -= sq->length; 3629 if (sq->data) { 3630 sctp_m_freem(sq->data); 3631 sq->data = NULL; 3632 } 3633 /* 3634 * no need to free the net count, since at this point all 3635 * assoc's are gone. 3636 */ 3637 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3638 SCTP_DECR_READQ_COUNT(); 3639 } 3640 /* Now the sctp_pcb things */ 3641 /* 3642 * free each asoc if it is not already closed/free. we can't use the 3643 * macro here since le_next will get freed as part of the 3644 * sctp_free_assoc() call. 3645 */ 3646 if (so) { 3647 #ifdef IPSEC 3648 ipsec_delete_pcbpolicy(ip_pcb); 3649 #endif /* IPSEC */ 3650 3651 /* Unlocks not needed since the socket is gone now */ 3652 } 3653 if (ip_pcb->inp_options) { 3654 (void)sctp_m_free(ip_pcb->inp_options); 3655 ip_pcb->inp_options = 0; 3656 } 3657 #ifdef INET6 3658 if (ip_pcb->inp_vflag & INP_IPV6) { 3659 struct in6pcb *in6p; 3660 3661 in6p = (struct in6pcb *)inp; 3662 ip6_freepcbopts(in6p->in6p_outputopts); 3663 } 3664 #endif /* INET6 */ 3665 ip_pcb->inp_vflag = 0; 3666 /* free up authentication fields */ 3667 if (inp->sctp_ep.local_auth_chunks != NULL) 3668 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3669 if (inp->sctp_ep.local_hmacs != NULL) 3670 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3671 3672 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3673 LIST_REMOVE(shared_key, next); 3674 sctp_free_sharedkey(shared_key); 3675 /* sa_ignore FREED_MEMORY */ 3676 } 3677 3678 /* 3679 * if we have an address list the following will free the list of 3680 * ifaddr's that are set into this ep. Again macro limitations here, 3681 * since the LIST_FOREACH could be a bad idea. 3682 */ 3683 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3684 sctp_remove_laddr(laddr); 3685 } 3686 3687 #ifdef SCTP_TRACK_FREED_ASOCS 3688 /* TEMP CODE */ 3689 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3690 LIST_REMOVE(asoc, sctp_tcblist); 3691 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3692 SCTP_DECR_ASOC_COUNT(); 3693 } 3694 /* *** END TEMP CODE *** */ 3695 #endif 3696 /* Now lets see about freeing the EP hash table. */ 3697 if (inp->sctp_tcbhash != NULL) { 3698 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3699 inp->sctp_tcbhash = NULL; 3700 } 3701 /* Now we must put the ep memory back into the zone pool */ 3702 crfree(inp->ip_inp.inp.inp_cred); 3703 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3704 SCTP_INP_LOCK_DESTROY(inp); 3705 SCTP_INP_READ_DESTROY(inp); 3706 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3707 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3708 SCTP_DECR_EP_COUNT(); 3709 } 3710 3711 3712 struct sctp_nets * 3713 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3714 { 3715 struct sctp_nets *net; 3716 3717 /* locate the address */ 3718 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3719 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3720 return (net); 3721 } 3722 return (NULL); 3723 } 3724 3725 3726 int 3727 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3728 { 3729 struct sctp_ifa *sctp_ifa; 3730 3731 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3732 if (sctp_ifa) { 3733 return (1); 3734 } else { 3735 return (0); 3736 } 3737 } 3738 3739 /* 3740 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3741 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3742 * stats of stuff. 3743 */ 3744 int 3745 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3746 struct sctp_nets **netp, int set_scope, int from) 3747 { 3748 /* 3749 * The following is redundant to the same lines in the 3750 * sctp_aloc_assoc() but is needed since others call the add address 3751 * function 3752 */ 3753 struct sctp_nets *net, *netfirst; 3754 int addr_inscope; 3755 3756 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3757 from); 3758 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3759 3760 netfirst = sctp_findnet(stcb, newaddr); 3761 if (netfirst) { 3762 /* 3763 * Lie and return ok, we don't want to make the association 3764 * go away for this behavior. It will happen in the TCP 3765 * model in a connected socket. It does not reach the hash 3766 * table until after the association is built so it can't be 3767 * found. Mark as reachable, since the initial creation will 3768 * have been cleared and the NOT_IN_ASSOC flag will have 3769 * been added... and we don't want to end up removing it 3770 * back out. 3771 */ 3772 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3773 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3774 SCTP_ADDR_UNCONFIRMED); 3775 } else { 3776 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3777 } 3778 3779 return (0); 3780 } 3781 addr_inscope = 1; 3782 switch (newaddr->sa_family) { 3783 #ifdef INET 3784 case AF_INET: 3785 { 3786 struct sockaddr_in *sin; 3787 3788 sin = (struct sockaddr_in *)newaddr; 3789 if (sin->sin_addr.s_addr == 0) { 3790 /* Invalid address */ 3791 return (-1); 3792 } 3793 /* zero out the bzero area */ 3794 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3795 3796 /* assure len is set */ 3797 sin->sin_len = sizeof(struct sockaddr_in); 3798 if (set_scope) { 3799 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3800 stcb->asoc.scope.ipv4_local_scope = 1; 3801 #else 3802 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3803 stcb->asoc.scope.ipv4_local_scope = 1; 3804 } 3805 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3806 } else { 3807 /* Validate the address is in scope */ 3808 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3809 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3810 addr_inscope = 0; 3811 } 3812 } 3813 break; 3814 } 3815 #endif 3816 #ifdef INET6 3817 case AF_INET6: 3818 { 3819 struct sockaddr_in6 *sin6; 3820 3821 sin6 = (struct sockaddr_in6 *)newaddr; 3822 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3823 /* Invalid address */ 3824 return (-1); 3825 } 3826 /* assure len is set */ 3827 sin6->sin6_len = sizeof(struct sockaddr_in6); 3828 if (set_scope) { 3829 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3830 stcb->asoc.scope.loopback_scope = 1; 3831 stcb->asoc.scope.local_scope = 0; 3832 stcb->asoc.scope.ipv4_local_scope = 1; 3833 stcb->asoc.scope.site_scope = 1; 3834 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3835 /* 3836 * If the new destination is a 3837 * LINK_LOCAL we must have common 3838 * site scope. Don't set the local 3839 * scope since we may not share all 3840 * links, only loopback can do this. 3841 * Links on the local network would 3842 * also be on our private network 3843 * for v4 too. 3844 */ 3845 stcb->asoc.scope.ipv4_local_scope = 1; 3846 stcb->asoc.scope.site_scope = 1; 3847 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3848 /* 3849 * If the new destination is 3850 * SITE_LOCAL then we must have site 3851 * scope in common. 3852 */ 3853 stcb->asoc.scope.site_scope = 1; 3854 } 3855 } else { 3856 /* Validate the address is in scope */ 3857 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3858 (stcb->asoc.scope.loopback_scope == 0)) { 3859 addr_inscope = 0; 3860 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3861 (stcb->asoc.scope.local_scope == 0)) { 3862 addr_inscope = 0; 3863 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3864 (stcb->asoc.scope.site_scope == 0)) { 3865 addr_inscope = 0; 3866 } 3867 } 3868 break; 3869 } 3870 #endif 3871 default: 3872 /* not supported family type */ 3873 return (-1); 3874 } 3875 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3876 if (net == NULL) { 3877 return (-1); 3878 } 3879 SCTP_INCR_RADDR_COUNT(); 3880 bzero(net, sizeof(struct sctp_nets)); 3881 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3882 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3883 switch (newaddr->sa_family) { 3884 #ifdef INET 3885 case AF_INET: 3886 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3887 break; 3888 #endif 3889 #ifdef INET6 3890 case AF_INET6: 3891 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3892 break; 3893 #endif 3894 default: 3895 break; 3896 } 3897 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3898 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3899 stcb->asoc.scope.loopback_scope = 1; 3900 stcb->asoc.scope.ipv4_local_scope = 1; 3901 stcb->asoc.scope.local_scope = 0; 3902 stcb->asoc.scope.site_scope = 1; 3903 addr_inscope = 1; 3904 } 3905 net->failure_threshold = stcb->asoc.def_net_failure; 3906 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3907 if (addr_inscope == 0) { 3908 net->dest_state = (SCTP_ADDR_REACHABLE | 3909 SCTP_ADDR_OUT_OF_SCOPE); 3910 } else { 3911 if (from == SCTP_ADDR_IS_CONFIRMED) 3912 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3913 net->dest_state = SCTP_ADDR_REACHABLE; 3914 else 3915 net->dest_state = SCTP_ADDR_REACHABLE | 3916 SCTP_ADDR_UNCONFIRMED; 3917 } 3918 /* 3919 * We set this to 0, the timer code knows that this means its an 3920 * initial value 3921 */ 3922 net->rto_needed = 1; 3923 net->RTO = 0; 3924 net->RTO_measured = 0; 3925 stcb->asoc.numnets++; 3926 net->ref_count = 1; 3927 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3928 net->port = stcb->asoc.port; 3929 net->dscp = stcb->asoc.default_dscp; 3930 #ifdef INET6 3931 net->flowlabel = stcb->asoc.default_flowlabel; 3932 #endif 3933 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3934 net->dest_state |= SCTP_ADDR_NOHB; 3935 } else { 3936 net->dest_state &= ~SCTP_ADDR_NOHB; 3937 } 3938 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3939 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3940 } else { 3941 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3942 } 3943 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3944 /* Init the timer structure */ 3945 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3946 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3947 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3948 3949 /* Now generate a route for this guy */ 3950 #ifdef INET6 3951 /* KAME hack: embed scopeid */ 3952 if (newaddr->sa_family == AF_INET6) { 3953 struct sockaddr_in6 *sin6; 3954 3955 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3956 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3957 sin6->sin6_scope_id = 0; 3958 } 3959 #endif 3960 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3961 3962 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3963 /* Get source address */ 3964 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3965 stcb, 3966 (sctp_route_t *) & net->ro, 3967 net, 3968 0, 3969 stcb->asoc.vrf_id); 3970 if (net->ro._s_addr != NULL) { 3971 net->src_addr_selected = 1; 3972 /* Now get the interface MTU */ 3973 if (net->ro._s_addr->ifn_p != NULL) { 3974 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3975 } 3976 } else { 3977 net->src_addr_selected = 0; 3978 } 3979 if (net->mtu > 0) { 3980 uint32_t rmtu; 3981 3982 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3983 if (rmtu == 0) { 3984 /* 3985 * Start things off to match mtu of 3986 * interface please. 3987 */ 3988 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3989 net->ro.ro_rt, net->mtu); 3990 } else { 3991 /* 3992 * we take the route mtu over the interface, 3993 * since the route may be leading out the 3994 * loopback, or a different interface. 3995 */ 3996 net->mtu = rmtu; 3997 } 3998 } 3999 } else { 4000 net->src_addr_selected = 0; 4001 } 4002 if (net->mtu == 0) { 4003 switch (newaddr->sa_family) { 4004 #ifdef INET 4005 case AF_INET: 4006 net->mtu = SCTP_DEFAULT_MTU; 4007 break; 4008 #endif 4009 #ifdef INET6 4010 case AF_INET6: 4011 net->mtu = 1280; 4012 break; 4013 #endif 4014 default: 4015 break; 4016 } 4017 } 4018 #if defined(INET) || defined(INET6) 4019 if (net->port) { 4020 net->mtu -= (uint32_t) sizeof(struct udphdr); 4021 } 4022 #endif 4023 if (from == SCTP_ALLOC_ASOC) { 4024 stcb->asoc.smallest_mtu = net->mtu; 4025 } 4026 if (stcb->asoc.smallest_mtu > net->mtu) { 4027 stcb->asoc.smallest_mtu = net->mtu; 4028 } 4029 #ifdef INET6 4030 if (newaddr->sa_family == AF_INET6) { 4031 struct sockaddr_in6 *sin6; 4032 4033 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4034 (void)sa6_recoverscope(sin6); 4035 } 4036 #endif 4037 4038 /* JRS - Use the congestion control given in the CC module */ 4039 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4040 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4041 4042 /* 4043 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4044 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4045 */ 4046 net->find_pseudo_cumack = 1; 4047 net->find_rtx_pseudo_cumack = 1; 4048 /* Choose an initial flowid. */ 4049 net->flowid = stcb->asoc.my_vtag ^ 4050 ntohs(stcb->rport) ^ 4051 ntohs(stcb->sctp_ep->sctp_lport); 4052 net->flowtype = M_HASHTYPE_OPAQUE; 4053 if (netp) { 4054 *netp = net; 4055 } 4056 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4057 if (net->ro.ro_rt == NULL) { 4058 /* Since we have no route put it at the back */ 4059 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4060 } else if (netfirst == NULL) { 4061 /* We are the first one in the pool. */ 4062 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4063 } else if (netfirst->ro.ro_rt == NULL) { 4064 /* 4065 * First one has NO route. Place this one ahead of the first 4066 * one. 4067 */ 4068 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4069 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4070 /* 4071 * This one has a different interface than the one at the 4072 * top of the list. Place it ahead. 4073 */ 4074 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4075 } else { 4076 /* 4077 * Ok we have the same interface as the first one. Move 4078 * forward until we find either a) one with a NULL route... 4079 * insert ahead of that b) one with a different ifp.. insert 4080 * after that. c) end of the list.. insert at the tail. 4081 */ 4082 struct sctp_nets *netlook; 4083 4084 do { 4085 netlook = TAILQ_NEXT(netfirst, sctp_next); 4086 if (netlook == NULL) { 4087 /* End of the list */ 4088 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4089 break; 4090 } else if (netlook->ro.ro_rt == NULL) { 4091 /* next one has NO route */ 4092 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4093 break; 4094 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4095 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4096 net, sctp_next); 4097 break; 4098 } 4099 /* Shift forward */ 4100 netfirst = netlook; 4101 } while (netlook != NULL); 4102 } 4103 4104 /* got to have a primary set */ 4105 if (stcb->asoc.primary_destination == 0) { 4106 stcb->asoc.primary_destination = net; 4107 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4108 (net->ro.ro_rt) && 4109 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4110 /* No route to current primary adopt new primary */ 4111 stcb->asoc.primary_destination = net; 4112 } 4113 /* Validate primary is first */ 4114 net = TAILQ_FIRST(&stcb->asoc.nets); 4115 if ((net != stcb->asoc.primary_destination) && 4116 (stcb->asoc.primary_destination)) { 4117 /* 4118 * first one on the list is NOT the primary sctp_cmpaddr() 4119 * is much more efficient if the primary is the first on the 4120 * list, make it so. 4121 */ 4122 TAILQ_REMOVE(&stcb->asoc.nets, 4123 stcb->asoc.primary_destination, sctp_next); 4124 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4125 stcb->asoc.primary_destination, sctp_next); 4126 } 4127 return (0); 4128 } 4129 4130 4131 static uint32_t 4132 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4133 { 4134 uint32_t id; 4135 struct sctpasochead *head; 4136 struct sctp_tcb *lstcb; 4137 4138 SCTP_INP_WLOCK(inp); 4139 try_again: 4140 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4141 /* TSNH */ 4142 SCTP_INP_WUNLOCK(inp); 4143 return (0); 4144 } 4145 /* 4146 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4147 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4148 */ 4149 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4150 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4151 } 4152 id = inp->sctp_associd_counter; 4153 inp->sctp_associd_counter++; 4154 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4155 if (lstcb) { 4156 goto try_again; 4157 } 4158 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4159 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4160 stcb->asoc.in_asocid_hash = 1; 4161 SCTP_INP_WUNLOCK(inp); 4162 return id; 4163 } 4164 4165 /* 4166 * allocate an association and add it to the endpoint. The caller must be 4167 * careful to add all additional addresses once they are know right away or 4168 * else the assoc will be may experience a blackout scenario. 4169 */ 4170 struct sctp_tcb * 4171 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4172 int *error, uint32_t override_tag, uint32_t vrf_id, 4173 struct thread *p 4174 ) 4175 { 4176 /* note the p argument is only valid in unbound sockets */ 4177 4178 struct sctp_tcb *stcb; 4179 struct sctp_association *asoc; 4180 struct sctpasochead *head; 4181 uint16_t rport; 4182 int err; 4183 4184 /* 4185 * Assumption made here: Caller has done a 4186 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4187 * address does not exist already. 4188 */ 4189 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4190 /* Hit max assoc, sorry no more */ 4191 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4192 *error = ENOBUFS; 4193 return (NULL); 4194 } 4195 if (firstaddr == NULL) { 4196 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4197 *error = EINVAL; 4198 return (NULL); 4199 } 4200 SCTP_INP_RLOCK(inp); 4201 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4202 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4203 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4204 /* 4205 * If its in the TCP pool, its NOT allowed to create an 4206 * association. The parent listener needs to call 4207 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4208 * off, or connected one does this.. its an error. 4209 */ 4210 SCTP_INP_RUNLOCK(inp); 4211 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4212 *error = EINVAL; 4213 return (NULL); 4214 } 4215 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4216 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4217 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4218 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4219 SCTP_INP_RUNLOCK(inp); 4220 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4221 *error = EINVAL; 4222 return (NULL); 4223 } 4224 } 4225 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4226 #ifdef SCTP_DEBUG 4227 if (firstaddr) { 4228 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4229 switch (firstaddr->sa_family) { 4230 #ifdef INET 4231 case AF_INET: 4232 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4233 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4234 break; 4235 #endif 4236 #ifdef INET6 4237 case AF_INET6: 4238 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4239 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4240 break; 4241 #endif 4242 default: 4243 break; 4244 } 4245 } else { 4246 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4247 } 4248 #endif /* SCTP_DEBUG */ 4249 switch (firstaddr->sa_family) { 4250 #ifdef INET 4251 case AF_INET: 4252 { 4253 struct sockaddr_in *sin; 4254 4255 sin = (struct sockaddr_in *)firstaddr; 4256 if ((ntohs(sin->sin_port) == 0) || 4257 (sin->sin_addr.s_addr == INADDR_ANY) || 4258 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4259 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4260 /* Invalid address */ 4261 SCTP_INP_RUNLOCK(inp); 4262 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4263 *error = EINVAL; 4264 return (NULL); 4265 } 4266 rport = sin->sin_port; 4267 break; 4268 } 4269 #endif 4270 #ifdef INET6 4271 case AF_INET6: 4272 { 4273 struct sockaddr_in6 *sin6; 4274 4275 sin6 = (struct sockaddr_in6 *)firstaddr; 4276 if ((ntohs(sin6->sin6_port) == 0) || 4277 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4278 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4279 /* Invalid address */ 4280 SCTP_INP_RUNLOCK(inp); 4281 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4282 *error = EINVAL; 4283 return (NULL); 4284 } 4285 rport = sin6->sin6_port; 4286 break; 4287 } 4288 #endif 4289 default: 4290 /* not supported family type */ 4291 SCTP_INP_RUNLOCK(inp); 4292 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4293 *error = EINVAL; 4294 return (NULL); 4295 } 4296 SCTP_INP_RUNLOCK(inp); 4297 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4298 /* 4299 * If you have not performed a bind, then we need to do the 4300 * ephemeral bind for you. 4301 */ 4302 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4303 (struct sockaddr *)NULL, 4304 (struct sctp_ifa *)NULL, 4305 p 4306 ))) { 4307 /* bind error, probably perm */ 4308 *error = err; 4309 return (NULL); 4310 } 4311 } 4312 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4313 if (stcb == NULL) { 4314 /* out of memory? */ 4315 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4316 *error = ENOMEM; 4317 return (NULL); 4318 } 4319 SCTP_INCR_ASOC_COUNT(); 4320 4321 bzero(stcb, sizeof(*stcb)); 4322 asoc = &stcb->asoc; 4323 4324 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4325 SCTP_TCB_LOCK_INIT(stcb); 4326 SCTP_TCB_SEND_LOCK_INIT(stcb); 4327 stcb->rport = rport; 4328 /* setup back pointer's */ 4329 stcb->sctp_ep = inp; 4330 stcb->sctp_socket = inp->sctp_socket; 4331 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4332 /* failed */ 4333 SCTP_TCB_LOCK_DESTROY(stcb); 4334 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4335 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4336 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4337 SCTP_DECR_ASOC_COUNT(); 4338 *error = err; 4339 return (NULL); 4340 } 4341 /* and the port */ 4342 SCTP_INP_INFO_WLOCK(); 4343 SCTP_INP_WLOCK(inp); 4344 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4345 /* inpcb freed while alloc going on */ 4346 SCTP_TCB_LOCK_DESTROY(stcb); 4347 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4348 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4349 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4350 SCTP_INP_WUNLOCK(inp); 4351 SCTP_INP_INFO_WUNLOCK(); 4352 SCTP_DECR_ASOC_COUNT(); 4353 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4354 *error = EINVAL; 4355 return (NULL); 4356 } 4357 SCTP_TCB_LOCK(stcb); 4358 4359 /* now that my_vtag is set, add it to the hash */ 4360 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4361 /* put it in the bucket in the vtag hash of assoc's for the system */ 4362 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4363 SCTP_INP_INFO_WUNLOCK(); 4364 4365 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4366 /* failure.. memory error? */ 4367 if (asoc->strmout) { 4368 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4369 asoc->strmout = NULL; 4370 } 4371 if (asoc->mapping_array) { 4372 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4373 asoc->mapping_array = NULL; 4374 } 4375 if (asoc->nr_mapping_array) { 4376 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4377 asoc->nr_mapping_array = NULL; 4378 } 4379 SCTP_DECR_ASOC_COUNT(); 4380 SCTP_TCB_UNLOCK(stcb); 4381 SCTP_TCB_LOCK_DESTROY(stcb); 4382 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4383 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4384 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4385 SCTP_INP_WUNLOCK(inp); 4386 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4387 *error = ENOBUFS; 4388 return (NULL); 4389 } 4390 /* Init all the timers */ 4391 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4392 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4393 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4394 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4395 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4396 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4397 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4398 4399 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4400 /* now file the port under the hash as well */ 4401 if (inp->sctp_tcbhash != NULL) { 4402 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4403 inp->sctp_hashmark)]; 4404 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4405 } 4406 SCTP_INP_WUNLOCK(inp); 4407 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4408 return (stcb); 4409 } 4410 4411 4412 void 4413 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4414 { 4415 struct sctp_association *asoc; 4416 4417 asoc = &stcb->asoc; 4418 asoc->numnets--; 4419 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4420 if (net == asoc->primary_destination) { 4421 /* Reset primary */ 4422 struct sctp_nets *lnet; 4423 4424 lnet = TAILQ_FIRST(&asoc->nets); 4425 /* 4426 * Mobility adaptation Ideally, if deleted destination is 4427 * the primary, it becomes a fast retransmission trigger by 4428 * the subsequent SET PRIMARY. (by micchie) 4429 */ 4430 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4431 SCTP_MOBILITY_BASE) || 4432 sctp_is_mobility_feature_on(stcb->sctp_ep, 4433 SCTP_MOBILITY_FASTHANDOFF)) { 4434 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4435 if (asoc->deleted_primary != NULL) { 4436 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4437 goto out; 4438 } 4439 asoc->deleted_primary = net; 4440 atomic_add_int(&net->ref_count, 1); 4441 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4442 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4443 sctp_mobility_feature_on(stcb->sctp_ep, 4444 SCTP_MOBILITY_PRIM_DELETED); 4445 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4446 stcb->sctp_ep, stcb, NULL); 4447 } 4448 out: 4449 /* Try to find a confirmed primary */ 4450 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4451 } 4452 if (net == asoc->last_data_chunk_from) { 4453 /* Reset primary */ 4454 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4455 } 4456 if (net == asoc->last_control_chunk_from) { 4457 /* Clear net */ 4458 asoc->last_control_chunk_from = NULL; 4459 } 4460 if (net == stcb->asoc.alternate) { 4461 sctp_free_remote_addr(stcb->asoc.alternate); 4462 stcb->asoc.alternate = NULL; 4463 } 4464 sctp_free_remote_addr(net); 4465 } 4466 4467 /* 4468 * remove a remote endpoint address from an association, it will fail if the 4469 * address does not exist. 4470 */ 4471 int 4472 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4473 { 4474 /* 4475 * Here we need to remove a remote address. This is quite simple, we 4476 * first find it in the list of address for the association 4477 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4478 * on that item. Note we do not allow it to be removed if there are 4479 * no other addresses. 4480 */ 4481 struct sctp_association *asoc; 4482 struct sctp_nets *net, *nnet; 4483 4484 asoc = &stcb->asoc; 4485 4486 /* locate the address */ 4487 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4488 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4489 continue; 4490 } 4491 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4492 remaddr)) { 4493 /* we found the guy */ 4494 if (asoc->numnets < 2) { 4495 /* Must have at LEAST two remote addresses */ 4496 return (-1); 4497 } else { 4498 sctp_remove_net(stcb, net); 4499 return (0); 4500 } 4501 } 4502 } 4503 /* not found. */ 4504 return (-2); 4505 } 4506 4507 void 4508 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4509 { 4510 struct sctpvtaghead *chain; 4511 struct sctp_tagblock *twait_block; 4512 int found = 0; 4513 int i; 4514 4515 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4516 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4517 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4518 if ((twait_block->vtag_block[i].v_tag == tag) && 4519 (twait_block->vtag_block[i].lport == lport) && 4520 (twait_block->vtag_block[i].rport == rport)) { 4521 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4522 twait_block->vtag_block[i].v_tag = 0; 4523 twait_block->vtag_block[i].lport = 0; 4524 twait_block->vtag_block[i].rport = 0; 4525 found = 1; 4526 break; 4527 } 4528 } 4529 if (found) 4530 break; 4531 } 4532 } 4533 4534 int 4535 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4536 { 4537 struct sctpvtaghead *chain; 4538 struct sctp_tagblock *twait_block; 4539 int found = 0; 4540 int i; 4541 4542 SCTP_INP_INFO_WLOCK(); 4543 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4544 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4545 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4546 if ((twait_block->vtag_block[i].v_tag == tag) && 4547 (twait_block->vtag_block[i].lport == lport) && 4548 (twait_block->vtag_block[i].rport == rport)) { 4549 found = 1; 4550 break; 4551 } 4552 } 4553 if (found) 4554 break; 4555 } 4556 SCTP_INP_INFO_WUNLOCK(); 4557 return (found); 4558 } 4559 4560 4561 void 4562 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4563 { 4564 struct sctpvtaghead *chain; 4565 struct sctp_tagblock *twait_block; 4566 struct timeval now; 4567 int set, i; 4568 4569 if (time == 0) { 4570 /* Its disabled */ 4571 return; 4572 } 4573 (void)SCTP_GETTIME_TIMEVAL(&now); 4574 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4575 set = 0; 4576 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4577 /* Block(s) present, lets find space, and expire on the fly */ 4578 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4579 if ((twait_block->vtag_block[i].v_tag == 0) && 4580 !set) { 4581 twait_block->vtag_block[i].tv_sec_at_expire = 4582 now.tv_sec + time; 4583 twait_block->vtag_block[i].v_tag = tag; 4584 twait_block->vtag_block[i].lport = lport; 4585 twait_block->vtag_block[i].rport = rport; 4586 set = 1; 4587 } else if ((twait_block->vtag_block[i].v_tag) && 4588 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4589 /* Audit expires this guy */ 4590 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4591 twait_block->vtag_block[i].v_tag = 0; 4592 twait_block->vtag_block[i].lport = 0; 4593 twait_block->vtag_block[i].rport = 0; 4594 if (set == 0) { 4595 /* Reuse it for my new tag */ 4596 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4597 twait_block->vtag_block[i].v_tag = tag; 4598 twait_block->vtag_block[i].lport = lport; 4599 twait_block->vtag_block[i].rport = rport; 4600 set = 1; 4601 } 4602 } 4603 } 4604 if (set) { 4605 /* 4606 * We only do up to the block where we can place our 4607 * tag for audits 4608 */ 4609 break; 4610 } 4611 } 4612 /* Need to add a new block to chain */ 4613 if (!set) { 4614 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4615 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4616 if (twait_block == NULL) { 4617 #ifdef INVARIANTS 4618 panic("Can not alloc tagblock"); 4619 #endif 4620 return; 4621 } 4622 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4623 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4624 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4625 twait_block->vtag_block[0].v_tag = tag; 4626 twait_block->vtag_block[0].lport = lport; 4627 twait_block->vtag_block[0].rport = rport; 4628 } 4629 } 4630 4631 4632 4633 /*- 4634 * Free the association after un-hashing the remote port. This 4635 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4636 * expect that the input to this function IS a locked TCB. 4637 * It will return 0, if it did NOT destroy the association (instead 4638 * it unlocks it. It will return NON-zero if it either destroyed the 4639 * association OR the association is already destroyed. 4640 */ 4641 int 4642 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4643 { 4644 int i; 4645 struct sctp_association *asoc; 4646 struct sctp_nets *net, *nnet; 4647 struct sctp_laddr *laddr, *naddr; 4648 struct sctp_tmit_chunk *chk, *nchk; 4649 struct sctp_asconf_addr *aparam, *naparam; 4650 struct sctp_asconf_ack *aack, *naack; 4651 struct sctp_stream_reset_list *strrst, *nstrrst; 4652 struct sctp_queued_to_read *sq, *nsq; 4653 struct sctp_stream_queue_pending *sp, *nsp; 4654 sctp_sharedkey_t *shared_key, *nshared_key; 4655 struct socket *so; 4656 4657 /* first, lets purge the entry from the hash table. */ 4658 4659 #ifdef SCTP_LOG_CLOSING 4660 sctp_log_closing(inp, stcb, 6); 4661 #endif 4662 if (stcb->asoc.state == 0) { 4663 #ifdef SCTP_LOG_CLOSING 4664 sctp_log_closing(inp, NULL, 7); 4665 #endif 4666 /* there is no asoc, really TSNH :-0 */ 4667 return (1); 4668 } 4669 if (stcb->asoc.alternate) { 4670 sctp_free_remote_addr(stcb->asoc.alternate); 4671 stcb->asoc.alternate = NULL; 4672 } 4673 /* TEMP CODE */ 4674 if (stcb->freed_from_where == 0) { 4675 /* Only record the first place free happened from */ 4676 stcb->freed_from_where = from_location; 4677 } 4678 /* TEMP CODE */ 4679 4680 asoc = &stcb->asoc; 4681 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4682 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4683 /* nothing around */ 4684 so = NULL; 4685 else 4686 so = inp->sctp_socket; 4687 4688 /* 4689 * We used timer based freeing if a reader or writer is in the way. 4690 * So we first check if we are actually being called from a timer, 4691 * if so we abort early if a reader or writer is still in the way. 4692 */ 4693 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4694 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4695 /* 4696 * is it the timer driving us? if so are the reader/writers 4697 * gone? 4698 */ 4699 if (stcb->asoc.refcnt) { 4700 /* nope, reader or writer in the way */ 4701 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4702 /* no asoc destroyed */ 4703 SCTP_TCB_UNLOCK(stcb); 4704 #ifdef SCTP_LOG_CLOSING 4705 sctp_log_closing(inp, stcb, 8); 4706 #endif 4707 return (0); 4708 } 4709 } 4710 /* now clean up any other timers */ 4711 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4712 asoc->dack_timer.self = NULL; 4713 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4714 /*- 4715 * For stream reset we don't blast this unless 4716 * it is a str-reset timer, it might be the 4717 * free-asoc timer which we DON'T want to 4718 * disturb. 4719 */ 4720 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4721 asoc->strreset_timer.self = NULL; 4722 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4723 asoc->asconf_timer.self = NULL; 4724 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4725 asoc->autoclose_timer.self = NULL; 4726 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4727 asoc->shut_guard_timer.self = NULL; 4728 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4729 asoc->delayed_event_timer.self = NULL; 4730 /* Mobility adaptation */ 4731 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4732 asoc->delete_prim_timer.self = NULL; 4733 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4734 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4735 net->rxt_timer.self = NULL; 4736 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4737 net->pmtu_timer.self = NULL; 4738 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4739 net->hb_timer.self = NULL; 4740 } 4741 /* Now the read queue needs to be cleaned up (only once) */ 4742 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4743 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4744 SCTP_INP_READ_LOCK(inp); 4745 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4746 if (sq->stcb == stcb) { 4747 sq->do_not_ref_stcb = 1; 4748 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4749 /* 4750 * If there is no end, there never will be 4751 * now. 4752 */ 4753 if (sq->end_added == 0) { 4754 /* Held for PD-API clear that. */ 4755 sq->pdapi_aborted = 1; 4756 sq->held_length = 0; 4757 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4758 /* 4759 * Need to add a PD-API 4760 * aborted indication. 4761 * Setting the control_pdapi 4762 * assures that it will be 4763 * added right after this 4764 * msg. 4765 */ 4766 uint32_t strseq; 4767 4768 stcb->asoc.control_pdapi = sq; 4769 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4770 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4771 stcb, 4772 SCTP_PARTIAL_DELIVERY_ABORTED, 4773 (void *)&strseq, 4774 SCTP_SO_LOCKED); 4775 stcb->asoc.control_pdapi = NULL; 4776 } 4777 } 4778 /* Add an end to wake them */ 4779 sq->end_added = 1; 4780 } 4781 } 4782 SCTP_INP_READ_UNLOCK(inp); 4783 if (stcb->block_entry) { 4784 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4785 stcb->block_entry->error = ECONNRESET; 4786 stcb->block_entry = NULL; 4787 } 4788 } 4789 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4790 /* 4791 * Someone holds a reference OR the socket is unaccepted 4792 * yet. 4793 */ 4794 if ((stcb->asoc.refcnt) || 4795 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4796 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4797 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4798 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4799 } 4800 SCTP_TCB_UNLOCK(stcb); 4801 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4802 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4803 /* nothing around */ 4804 so = NULL; 4805 if (so) { 4806 /* Wake any reader/writers */ 4807 sctp_sorwakeup(inp, so); 4808 sctp_sowwakeup(inp, so); 4809 } 4810 #ifdef SCTP_LOG_CLOSING 4811 sctp_log_closing(inp, stcb, 9); 4812 #endif 4813 /* no asoc destroyed */ 4814 return (0); 4815 } 4816 #ifdef SCTP_LOG_CLOSING 4817 sctp_log_closing(inp, stcb, 10); 4818 #endif 4819 /* 4820 * When I reach here, no others want to kill the assoc yet.. and I 4821 * own the lock. Now its possible an abort comes in when I do the 4822 * lock exchange below to grab all the locks to do the final take 4823 * out. to prevent this we increment the count, which will start a 4824 * timer and blow out above thus assuring us that we hold exclusive 4825 * killing of the asoc. Note that after getting back the TCB lock we 4826 * will go ahead and increment the counter back up and stop any 4827 * timer a passing stranger may have started :-S 4828 */ 4829 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4830 atomic_add_int(&stcb->asoc.refcnt, 1); 4831 4832 SCTP_TCB_UNLOCK(stcb); 4833 SCTP_INP_INFO_WLOCK(); 4834 SCTP_INP_WLOCK(inp); 4835 SCTP_TCB_LOCK(stcb); 4836 } 4837 /* Double check the GONE flag */ 4838 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4839 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4840 /* nothing around */ 4841 so = NULL; 4842 4843 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4844 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4845 /* 4846 * For TCP type we need special handling when we are 4847 * connected. We also include the peel'ed off ones to. 4848 */ 4849 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4850 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4851 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4852 if (so) { 4853 SOCK_LOCK(so); 4854 if (so->so_rcv.sb_cc == 0) { 4855 so->so_state &= ~(SS_ISCONNECTING | 4856 SS_ISDISCONNECTING | 4857 SS_ISCONFIRMING | 4858 SS_ISCONNECTED); 4859 } 4860 socantrcvmore_locked(so); 4861 sctp_sowwakeup(inp, so); 4862 sctp_sorwakeup(inp, so); 4863 SCTP_SOWAKEUP(so); 4864 } 4865 } 4866 } 4867 /* 4868 * Make it invalid too, that way if its about to run it will abort 4869 * and return. 4870 */ 4871 /* re-increment the lock */ 4872 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4873 atomic_add_int(&stcb->asoc.refcnt, -1); 4874 } 4875 if (stcb->asoc.refcnt) { 4876 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4877 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4878 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4879 SCTP_INP_INFO_WUNLOCK(); 4880 SCTP_INP_WUNLOCK(inp); 4881 } 4882 SCTP_TCB_UNLOCK(stcb); 4883 return (0); 4884 } 4885 asoc->state = 0; 4886 if (inp->sctp_tcbhash) { 4887 LIST_REMOVE(stcb, sctp_tcbhash); 4888 } 4889 if (stcb->asoc.in_asocid_hash) { 4890 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4891 } 4892 /* Now lets remove it from the list of ALL associations in the EP */ 4893 LIST_REMOVE(stcb, sctp_tcblist); 4894 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4895 SCTP_INP_INCR_REF(inp); 4896 SCTP_INP_WUNLOCK(inp); 4897 } 4898 /* pull from vtag hash */ 4899 LIST_REMOVE(stcb, sctp_asocs); 4900 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4901 inp->sctp_lport, stcb->rport); 4902 4903 /* 4904 * Now restop the timers to be sure this is paranoia at is finest! 4905 */ 4906 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4907 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4908 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4909 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4910 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4911 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4912 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4913 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4914 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4915 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4916 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4917 } 4918 4919 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4920 /* 4921 * The chunk lists and such SHOULD be empty but we check them just 4922 * in case. 4923 */ 4924 /* anything on the wheel needs to be removed */ 4925 for (i = 0; i < asoc->streamoutcnt; i++) { 4926 struct sctp_stream_out *outs; 4927 4928 outs = &asoc->strmout[i]; 4929 /* now clean up any chunks here */ 4930 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4931 TAILQ_REMOVE(&outs->outqueue, sp, next); 4932 sctp_free_spbufspace(stcb, asoc, sp); 4933 if (sp->data) { 4934 if (so) { 4935 /* Still an open socket - report */ 4936 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4937 0, (void *)sp, SCTP_SO_LOCKED); 4938 } 4939 if (sp->data) { 4940 sctp_m_freem(sp->data); 4941 sp->data = NULL; 4942 sp->tail_mbuf = NULL; 4943 sp->length = 0; 4944 } 4945 } 4946 if (sp->net) { 4947 sctp_free_remote_addr(sp->net); 4948 sp->net = NULL; 4949 } 4950 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4951 } 4952 } 4953 /* sa_ignore FREED_MEMORY */ 4954 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4955 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4956 SCTP_FREE(strrst, SCTP_M_STRESET); 4957 } 4958 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4959 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4960 if (sq->data) { 4961 sctp_m_freem(sq->data); 4962 sq->data = NULL; 4963 } 4964 sctp_free_remote_addr(sq->whoFrom); 4965 sq->whoFrom = NULL; 4966 sq->stcb = NULL; 4967 /* Free the ctl entry */ 4968 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4969 SCTP_DECR_READQ_COUNT(); 4970 /* sa_ignore FREED_MEMORY */ 4971 } 4972 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4973 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4974 if (chk->data) { 4975 sctp_m_freem(chk->data); 4976 chk->data = NULL; 4977 } 4978 if (chk->holds_key_ref) 4979 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4980 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4981 SCTP_DECR_CHK_COUNT(); 4982 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4983 asoc->free_chunk_cnt--; 4984 /* sa_ignore FREED_MEMORY */ 4985 } 4986 /* pending send queue SHOULD be empty */ 4987 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4988 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4989 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4990 #ifdef INVARIANTS 4991 } else { 4992 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 4993 #endif 4994 } 4995 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 4996 if (chk->data) { 4997 if (so) { 4998 /* Still a socket? */ 4999 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5000 0, chk, SCTP_SO_LOCKED); 5001 } 5002 if (chk->data) { 5003 sctp_m_freem(chk->data); 5004 chk->data = NULL; 5005 } 5006 } 5007 if (chk->holds_key_ref) 5008 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5009 if (chk->whoTo) { 5010 sctp_free_remote_addr(chk->whoTo); 5011 chk->whoTo = NULL; 5012 } 5013 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5014 SCTP_DECR_CHK_COUNT(); 5015 /* sa_ignore FREED_MEMORY */ 5016 } 5017 /* sent queue SHOULD be empty */ 5018 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5019 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5020 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5021 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5022 #ifdef INVARIANTS 5023 } else { 5024 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5025 #endif 5026 } 5027 } 5028 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5029 if (chk->data) { 5030 if (so) { 5031 /* Still a socket? */ 5032 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5033 0, chk, SCTP_SO_LOCKED); 5034 } 5035 if (chk->data) { 5036 sctp_m_freem(chk->data); 5037 chk->data = NULL; 5038 } 5039 } 5040 if (chk->holds_key_ref) 5041 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5042 sctp_free_remote_addr(chk->whoTo); 5043 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5044 SCTP_DECR_CHK_COUNT(); 5045 /* sa_ignore FREED_MEMORY */ 5046 } 5047 #ifdef INVARIANTS 5048 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5049 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5050 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5051 } 5052 } 5053 #endif 5054 /* control queue MAY not be empty */ 5055 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5056 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5057 if (chk->data) { 5058 sctp_m_freem(chk->data); 5059 chk->data = NULL; 5060 } 5061 if (chk->holds_key_ref) 5062 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5063 sctp_free_remote_addr(chk->whoTo); 5064 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5065 SCTP_DECR_CHK_COUNT(); 5066 /* sa_ignore FREED_MEMORY */ 5067 } 5068 /* ASCONF queue MAY not be empty */ 5069 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5070 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5071 if (chk->data) { 5072 sctp_m_freem(chk->data); 5073 chk->data = NULL; 5074 } 5075 if (chk->holds_key_ref) 5076 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5077 sctp_free_remote_addr(chk->whoTo); 5078 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5079 SCTP_DECR_CHK_COUNT(); 5080 /* sa_ignore FREED_MEMORY */ 5081 } 5082 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5083 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5084 if (chk->data) { 5085 sctp_m_freem(chk->data); 5086 chk->data = NULL; 5087 } 5088 if (chk->holds_key_ref) 5089 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5090 sctp_free_remote_addr(chk->whoTo); 5091 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5092 SCTP_DECR_CHK_COUNT(); 5093 /* sa_ignore FREED_MEMORY */ 5094 } 5095 5096 if (asoc->mapping_array) { 5097 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5098 asoc->mapping_array = NULL; 5099 } 5100 if (asoc->nr_mapping_array) { 5101 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5102 asoc->nr_mapping_array = NULL; 5103 } 5104 /* the stream outs */ 5105 if (asoc->strmout) { 5106 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5107 asoc->strmout = NULL; 5108 } 5109 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5110 if (asoc->strmin) { 5111 struct sctp_queued_to_read *ctl, *nctl; 5112 5113 for (i = 0; i < asoc->streamincnt; i++) { 5114 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5115 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5116 sctp_free_remote_addr(ctl->whoFrom); 5117 if (ctl->data) { 5118 sctp_m_freem(ctl->data); 5119 ctl->data = NULL; 5120 } 5121 /* 5122 * We don't free the address here since all 5123 * the net's were freed above. 5124 */ 5125 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5126 SCTP_DECR_READQ_COUNT(); 5127 } 5128 } 5129 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5130 asoc->strmin = NULL; 5131 } 5132 asoc->streamincnt = 0; 5133 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5134 #ifdef INVARIANTS 5135 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5136 panic("no net's left alloc'ed, or list points to itself"); 5137 } 5138 #endif 5139 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5140 sctp_free_remote_addr(net); 5141 } 5142 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5143 /* sa_ignore FREED_MEMORY */ 5144 sctp_remove_laddr(laddr); 5145 } 5146 5147 /* pending asconf (address) parameters */ 5148 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5149 /* sa_ignore FREED_MEMORY */ 5150 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5151 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5152 } 5153 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5154 /* sa_ignore FREED_MEMORY */ 5155 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5156 if (aack->data != NULL) { 5157 sctp_m_freem(aack->data); 5158 } 5159 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5160 } 5161 /* clean up auth stuff */ 5162 if (asoc->local_hmacs) 5163 sctp_free_hmaclist(asoc->local_hmacs); 5164 if (asoc->peer_hmacs) 5165 sctp_free_hmaclist(asoc->peer_hmacs); 5166 5167 if (asoc->local_auth_chunks) 5168 sctp_free_chunklist(asoc->local_auth_chunks); 5169 if (asoc->peer_auth_chunks) 5170 sctp_free_chunklist(asoc->peer_auth_chunks); 5171 5172 sctp_free_authinfo(&asoc->authinfo); 5173 5174 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5175 LIST_REMOVE(shared_key, next); 5176 sctp_free_sharedkey(shared_key); 5177 /* sa_ignore FREED_MEMORY */ 5178 } 5179 5180 /* Insert new items here :> */ 5181 5182 /* Get rid of LOCK */ 5183 SCTP_TCB_UNLOCK(stcb); 5184 SCTP_TCB_LOCK_DESTROY(stcb); 5185 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5186 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5187 SCTP_INP_INFO_WUNLOCK(); 5188 SCTP_INP_RLOCK(inp); 5189 } 5190 #ifdef SCTP_TRACK_FREED_ASOCS 5191 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5192 /* now clean up the tasoc itself */ 5193 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5194 SCTP_DECR_ASOC_COUNT(); 5195 } else { 5196 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5197 } 5198 #else 5199 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5200 SCTP_DECR_ASOC_COUNT(); 5201 #endif 5202 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5203 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5204 /* 5205 * If its NOT the inp_free calling us AND sctp_close 5206 * as been called, we call back... 5207 */ 5208 SCTP_INP_RUNLOCK(inp); 5209 /* 5210 * This will start the kill timer (if we are the 5211 * last one) since we hold an increment yet. But 5212 * this is the only safe way to do this since 5213 * otherwise if the socket closes at the same time 5214 * we are here we might collide in the cleanup. 5215 */ 5216 sctp_inpcb_free(inp, 5217 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5218 SCTP_CALLED_DIRECTLY_NOCMPSET); 5219 SCTP_INP_DECR_REF(inp); 5220 goto out_of; 5221 } else { 5222 /* The socket is still open. */ 5223 SCTP_INP_DECR_REF(inp); 5224 } 5225 } 5226 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5227 SCTP_INP_RUNLOCK(inp); 5228 } 5229 out_of: 5230 /* destroyed the asoc */ 5231 #ifdef SCTP_LOG_CLOSING 5232 sctp_log_closing(inp, NULL, 11); 5233 #endif 5234 return (1); 5235 } 5236 5237 5238 5239 /* 5240 * determine if a destination is "reachable" based upon the addresses bound 5241 * to the current endpoint (e.g. only v4 or v6 currently bound) 5242 */ 5243 /* 5244 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5245 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5246 * types bound as its endpoint 5247 */ 5248 int 5249 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5250 { 5251 struct sctp_inpcb *inp; 5252 int answer; 5253 5254 /* 5255 * No locks here, the TCB, in all cases is already locked and an 5256 * assoc is up. There is either a INP lock by the caller applied (in 5257 * asconf case when deleting an address) or NOT in the HB case, 5258 * however if HB then the INP increment is up and the INP will not 5259 * be removed (on top of the fact that we have a TCB lock). So we 5260 * only want to read the sctp_flags, which is either bound-all or 5261 * not.. no protection needed since once an assoc is up you can't be 5262 * changing your binding. 5263 */ 5264 inp = stcb->sctp_ep; 5265 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5266 /* if bound all, destination is not restricted */ 5267 /* 5268 * RRS: Question during lock work: Is this correct? If you 5269 * are bound-all you still might need to obey the V4--V6 5270 * flags??? IMO this bound-all stuff needs to be removed! 5271 */ 5272 return (1); 5273 } 5274 /* NOTE: all "scope" checks are done when local addresses are added */ 5275 switch (destaddr->sa_family) { 5276 #ifdef INET6 5277 case AF_INET6: 5278 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5279 break; 5280 #endif 5281 #ifdef INET 5282 case AF_INET: 5283 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5284 break; 5285 #endif 5286 default: 5287 /* invalid family, so it's unreachable */ 5288 answer = 0; 5289 break; 5290 } 5291 return (answer); 5292 } 5293 5294 /* 5295 * update the inp_vflags on an endpoint 5296 */ 5297 static void 5298 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5299 { 5300 struct sctp_laddr *laddr; 5301 5302 /* first clear the flag */ 5303 inp->ip_inp.inp.inp_vflag = 0; 5304 /* set the flag based on addresses on the ep list */ 5305 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5306 if (laddr->ifa == NULL) { 5307 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5308 __FUNCTION__); 5309 continue; 5310 } 5311 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5312 continue; 5313 } 5314 switch (laddr->ifa->address.sa.sa_family) { 5315 #ifdef INET6 5316 case AF_INET6: 5317 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5318 break; 5319 #endif 5320 #ifdef INET 5321 case AF_INET: 5322 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5323 break; 5324 #endif 5325 default: 5326 break; 5327 } 5328 } 5329 } 5330 5331 /* 5332 * Add the address to the endpoint local address list There is nothing to be 5333 * done if we are bound to all addresses 5334 */ 5335 void 5336 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5337 { 5338 struct sctp_laddr *laddr; 5339 int fnd, error = 0; 5340 5341 fnd = 0; 5342 5343 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5344 /* You are already bound to all. You have it already */ 5345 return; 5346 } 5347 #ifdef INET6 5348 if (ifa->address.sa.sa_family == AF_INET6) { 5349 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5350 /* Can't bind a non-useable addr. */ 5351 return; 5352 } 5353 } 5354 #endif 5355 /* first, is it already present? */ 5356 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5357 if (laddr->ifa == ifa) { 5358 fnd = 1; 5359 break; 5360 } 5361 } 5362 5363 if (fnd == 0) { 5364 /* Not in the ep list */ 5365 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5366 if (error != 0) 5367 return; 5368 inp->laddr_count++; 5369 /* update inp_vflag flags */ 5370 switch (ifa->address.sa.sa_family) { 5371 #ifdef INET6 5372 case AF_INET6: 5373 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5374 break; 5375 #endif 5376 #ifdef INET 5377 case AF_INET: 5378 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5379 break; 5380 #endif 5381 default: 5382 break; 5383 } 5384 } 5385 return; 5386 } 5387 5388 5389 /* 5390 * select a new (hopefully reachable) destination net (should only be used 5391 * when we deleted an ep addr that is the only usable source address to reach 5392 * the destination net) 5393 */ 5394 static void 5395 sctp_select_primary_destination(struct sctp_tcb *stcb) 5396 { 5397 struct sctp_nets *net; 5398 5399 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5400 /* for now, we'll just pick the first reachable one we find */ 5401 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5402 continue; 5403 if (sctp_destination_is_reachable(stcb, 5404 (struct sockaddr *)&net->ro._l_addr)) { 5405 /* found a reachable destination */ 5406 stcb->asoc.primary_destination = net; 5407 } 5408 } 5409 /* I can't there from here! ...we're gonna die shortly... */ 5410 } 5411 5412 5413 /* 5414 * Delete the address from the endpoint local address list There is nothing 5415 * to be done if we are bound to all addresses 5416 */ 5417 void 5418 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5419 { 5420 struct sctp_laddr *laddr; 5421 int fnd; 5422 5423 fnd = 0; 5424 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5425 /* You are already bound to all. You have it already */ 5426 return; 5427 } 5428 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5429 if (laddr->ifa == ifa) { 5430 fnd = 1; 5431 break; 5432 } 5433 } 5434 if (fnd && (inp->laddr_count < 2)) { 5435 /* can't delete unless there are at LEAST 2 addresses */ 5436 return; 5437 } 5438 if (fnd) { 5439 /* 5440 * clean up any use of this address go through our 5441 * associations and clear any last_used_address that match 5442 * this one for each assoc, see if a new primary_destination 5443 * is needed 5444 */ 5445 struct sctp_tcb *stcb; 5446 5447 /* clean up "next_addr_touse" */ 5448 if (inp->next_addr_touse == laddr) 5449 /* delete this address */ 5450 inp->next_addr_touse = NULL; 5451 5452 /* clean up "last_used_address" */ 5453 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5454 struct sctp_nets *net; 5455 5456 SCTP_TCB_LOCK(stcb); 5457 if (stcb->asoc.last_used_address == laddr) 5458 /* delete this address */ 5459 stcb->asoc.last_used_address = NULL; 5460 /* 5461 * Now spin through all the nets and purge any ref 5462 * to laddr 5463 */ 5464 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5465 if (net->ro._s_addr && 5466 (net->ro._s_addr->ifa == laddr->ifa)) { 5467 /* Yep, purge src address selected */ 5468 sctp_rtentry_t *rt; 5469 5470 /* delete this address if cached */ 5471 rt = net->ro.ro_rt; 5472 if (rt != NULL) { 5473 RTFREE(rt); 5474 net->ro.ro_rt = NULL; 5475 } 5476 sctp_free_ifa(net->ro._s_addr); 5477 net->ro._s_addr = NULL; 5478 net->src_addr_selected = 0; 5479 } 5480 } 5481 SCTP_TCB_UNLOCK(stcb); 5482 } /* for each tcb */ 5483 /* remove it from the ep list */ 5484 sctp_remove_laddr(laddr); 5485 inp->laddr_count--; 5486 /* update inp_vflag flags */ 5487 sctp_update_ep_vflag(inp); 5488 } 5489 return; 5490 } 5491 5492 /* 5493 * Add the address to the TCB local address restricted list. 5494 * This is a "pending" address list (eg. addresses waiting for an 5495 * ASCONF-ACK response) and cannot be used as a valid source address. 5496 */ 5497 void 5498 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5499 { 5500 struct sctp_laddr *laddr; 5501 struct sctpladdr *list; 5502 5503 /* 5504 * Assumes TCB is locked.. and possibly the INP. May need to 5505 * confirm/fix that if we need it and is not the case. 5506 */ 5507 list = &stcb->asoc.sctp_restricted_addrs; 5508 5509 #ifdef INET6 5510 if (ifa->address.sa.sa_family == AF_INET6) { 5511 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5512 /* Can't bind a non-existent addr. */ 5513 return; 5514 } 5515 } 5516 #endif 5517 /* does the address already exist? */ 5518 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5519 if (laddr->ifa == ifa) { 5520 return; 5521 } 5522 } 5523 5524 /* add to the list */ 5525 (void)sctp_insert_laddr(list, ifa, 0); 5526 return; 5527 } 5528 5529 /* 5530 * insert an laddr entry with the given ifa for the desired list 5531 */ 5532 int 5533 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5534 { 5535 struct sctp_laddr *laddr; 5536 5537 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5538 if (laddr == NULL) { 5539 /* out of memory? */ 5540 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5541 return (EINVAL); 5542 } 5543 SCTP_INCR_LADDR_COUNT(); 5544 bzero(laddr, sizeof(*laddr)); 5545 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5546 laddr->ifa = ifa; 5547 laddr->action = act; 5548 atomic_add_int(&ifa->refcount, 1); 5549 /* insert it */ 5550 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5551 5552 return (0); 5553 } 5554 5555 /* 5556 * Remove an laddr entry from the local address list (on an assoc) 5557 */ 5558 void 5559 sctp_remove_laddr(struct sctp_laddr *laddr) 5560 { 5561 5562 /* remove from the list */ 5563 LIST_REMOVE(laddr, sctp_nxt_addr); 5564 sctp_free_ifa(laddr->ifa); 5565 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5566 SCTP_DECR_LADDR_COUNT(); 5567 } 5568 5569 /* 5570 * Remove a local address from the TCB local address restricted list 5571 */ 5572 void 5573 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5574 { 5575 struct sctp_inpcb *inp; 5576 struct sctp_laddr *laddr; 5577 5578 /* 5579 * This is called by asconf work. It is assumed that a) The TCB is 5580 * locked and b) The INP is locked. This is true in as much as I can 5581 * trace through the entry asconf code where I did these locks. 5582 * Again, the ASCONF code is a bit different in that it does lock 5583 * the INP during its work often times. This must be since we don't 5584 * want other proc's looking up things while what they are looking 5585 * up is changing :-D 5586 */ 5587 5588 inp = stcb->sctp_ep; 5589 /* if subset bound and don't allow ASCONF's, can't delete last */ 5590 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5591 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5592 if (stcb->sctp_ep->laddr_count < 2) { 5593 /* can't delete last address */ 5594 return; 5595 } 5596 } 5597 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5598 /* remove the address if it exists */ 5599 if (laddr->ifa == NULL) 5600 continue; 5601 if (laddr->ifa == ifa) { 5602 sctp_remove_laddr(laddr); 5603 return; 5604 } 5605 } 5606 5607 /* address not found! */ 5608 return; 5609 } 5610 5611 /* 5612 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5613 */ 5614 /* sysctl */ 5615 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5616 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5617 5618 5619 5620 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5621 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5622 int *sctp_cpuarry = NULL; 5623 void 5624 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5625 { 5626 /* Queue a packet to a processor for the specified core */ 5627 struct sctp_mcore_queue *qent; 5628 struct sctp_mcore_ctrl *wkq; 5629 int need_wake = 0; 5630 5631 if (sctp_mcore_workers == NULL) { 5632 /* Something went way bad during setup */ 5633 sctp_input_with_port(m, off, 0); 5634 return; 5635 } 5636 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5637 (sizeof(struct sctp_mcore_queue)), 5638 SCTP_M_MCORE); 5639 if (qent == NULL) { 5640 /* This is trouble */ 5641 sctp_input_with_port(m, off, 0); 5642 return; 5643 } 5644 qent->vn = curvnet; 5645 qent->m = m; 5646 qent->off = off; 5647 qent->v6 = 0; 5648 wkq = &sctp_mcore_workers[cpu_to_use]; 5649 SCTP_MCORE_QLOCK(wkq); 5650 5651 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5652 if (wkq->running == 0) { 5653 need_wake = 1; 5654 } 5655 SCTP_MCORE_QUNLOCK(wkq); 5656 if (need_wake) { 5657 wakeup(&wkq->running); 5658 } 5659 } 5660 5661 static void 5662 sctp_mcore_thread(void *arg) 5663 { 5664 5665 struct sctp_mcore_ctrl *wkq; 5666 struct sctp_mcore_queue *qent; 5667 5668 wkq = (struct sctp_mcore_ctrl *)arg; 5669 struct mbuf *m; 5670 int off, v6; 5671 5672 /* Wait for first tickle */ 5673 SCTP_MCORE_LOCK(wkq); 5674 wkq->running = 0; 5675 msleep(&wkq->running, 5676 &wkq->core_mtx, 5677 0, "wait for pkt", 0); 5678 SCTP_MCORE_UNLOCK(wkq); 5679 5680 /* Bind to our cpu */ 5681 thread_lock(curthread); 5682 sched_bind(curthread, wkq->cpuid); 5683 thread_unlock(curthread); 5684 5685 /* Now lets start working */ 5686 SCTP_MCORE_LOCK(wkq); 5687 /* Now grab lock and go */ 5688 for (;;) { 5689 SCTP_MCORE_QLOCK(wkq); 5690 skip_sleep: 5691 wkq->running = 1; 5692 qent = TAILQ_FIRST(&wkq->que); 5693 if (qent) { 5694 TAILQ_REMOVE(&wkq->que, qent, next); 5695 SCTP_MCORE_QUNLOCK(wkq); 5696 CURVNET_SET(qent->vn); 5697 m = qent->m; 5698 off = qent->off; 5699 v6 = qent->v6; 5700 SCTP_FREE(qent, SCTP_M_MCORE); 5701 if (v6 == 0) { 5702 sctp_input_with_port(m, off, 0); 5703 } else { 5704 SCTP_PRINTF("V6 not yet supported\n"); 5705 sctp_m_freem(m); 5706 } 5707 CURVNET_RESTORE(); 5708 SCTP_MCORE_QLOCK(wkq); 5709 } 5710 wkq->running = 0; 5711 if (!TAILQ_EMPTY(&wkq->que)) { 5712 goto skip_sleep; 5713 } 5714 SCTP_MCORE_QUNLOCK(wkq); 5715 msleep(&wkq->running, 5716 &wkq->core_mtx, 5717 0, "wait for pkt", 0); 5718 } 5719 } 5720 5721 static void 5722 sctp_startup_mcore_threads(void) 5723 { 5724 int i, cpu; 5725 5726 if (mp_ncpus == 1) 5727 return; 5728 5729 if (sctp_mcore_workers != NULL) { 5730 /* 5731 * Already been here in some previous vnet? 5732 */ 5733 return; 5734 } 5735 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5736 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5737 SCTP_M_MCORE); 5738 if (sctp_mcore_workers == NULL) { 5739 /* TSNH I hope */ 5740 return; 5741 } 5742 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5743 sizeof(struct sctp_mcore_ctrl))); 5744 /* Init the structures */ 5745 for (i = 0; i <= mp_maxid; i++) { 5746 TAILQ_INIT(&sctp_mcore_workers[i].que); 5747 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5748 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5749 sctp_mcore_workers[i].cpuid = i; 5750 } 5751 if (sctp_cpuarry == NULL) { 5752 SCTP_MALLOC(sctp_cpuarry, int *, 5753 (mp_ncpus * sizeof(int)), 5754 SCTP_M_MCORE); 5755 i = 0; 5756 CPU_FOREACH(cpu) { 5757 sctp_cpuarry[i] = cpu; 5758 i++; 5759 } 5760 } 5761 /* Now start them all */ 5762 CPU_FOREACH(cpu) { 5763 (void)kproc_create(sctp_mcore_thread, 5764 (void *)&sctp_mcore_workers[cpu], 5765 &sctp_mcore_workers[cpu].thread_proc, 5766 RFPROC, 5767 SCTP_KTHREAD_PAGES, 5768 SCTP_MCORE_NAME); 5769 5770 } 5771 } 5772 5773 #endif 5774 5775 void 5776 sctp_pcb_init() 5777 { 5778 /* 5779 * SCTP initialization for the PCB structures should be called by 5780 * the sctp_init() funciton. 5781 */ 5782 int i; 5783 struct timeval tv; 5784 5785 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5786 /* error I was called twice */ 5787 return; 5788 } 5789 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5790 5791 #if defined(SCTP_LOCAL_TRACE_BUF) 5792 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5793 #endif 5794 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5795 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5796 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5797 SCTP_M_MCORE); 5798 #endif 5799 (void)SCTP_GETTIME_TIMEVAL(&tv); 5800 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5801 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5802 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5803 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5804 #else 5805 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5806 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5807 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5808 #endif 5809 /* init the empty list of (All) Endpoints */ 5810 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5811 5812 5813 /* init the hash table of endpoints */ 5814 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5815 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5816 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5817 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5818 &SCTP_BASE_INFO(hashasocmark)); 5819 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5820 &SCTP_BASE_INFO(hashmark)); 5821 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5822 &SCTP_BASE_INFO(hashtcpmark)); 5823 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5824 5825 5826 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5827 &SCTP_BASE_INFO(hashvrfmark)); 5828 5829 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5830 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5831 /* init the zones */ 5832 /* 5833 * FIX ME: Should check for NULL returns, but if it does fail we are 5834 * doomed to panic anyways... add later maybe. 5835 */ 5836 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5837 sizeof(struct sctp_inpcb), maxsockets); 5838 5839 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5840 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5841 5842 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5843 sizeof(struct sctp_laddr), 5844 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5845 5846 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5847 sizeof(struct sctp_nets), 5848 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5849 5850 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5851 sizeof(struct sctp_tmit_chunk), 5852 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5853 5854 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5855 sizeof(struct sctp_queued_to_read), 5856 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5857 5858 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5859 sizeof(struct sctp_stream_queue_pending), 5860 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5861 5862 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5863 sizeof(struct sctp_asconf), 5864 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5865 5866 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5867 sizeof(struct sctp_asconf_ack), 5868 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5869 5870 5871 /* Master Lock INIT for info structure */ 5872 SCTP_INP_INFO_LOCK_INIT(); 5873 SCTP_STATLOG_INIT_LOCK(); 5874 5875 SCTP_IPI_COUNT_INIT(); 5876 SCTP_IPI_ADDR_INIT(); 5877 #ifdef SCTP_PACKET_LOGGING 5878 SCTP_IP_PKTLOG_INIT(); 5879 #endif 5880 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5881 5882 SCTP_WQ_ADDR_INIT(); 5883 /* not sure if we need all the counts */ 5884 SCTP_BASE_INFO(ipi_count_ep) = 0; 5885 /* assoc/tcb zone info */ 5886 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5887 /* local addrlist zone info */ 5888 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5889 /* remote addrlist zone info */ 5890 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5891 /* chunk info */ 5892 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5893 5894 /* socket queue zone info */ 5895 SCTP_BASE_INFO(ipi_count_readq) = 0; 5896 5897 /* stream out queue cont */ 5898 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5899 5900 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5901 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5902 5903 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5904 5905 /* Init the TIMEWAIT list */ 5906 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5907 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5908 } 5909 sctp_startup_iterator(); 5910 5911 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5912 sctp_startup_mcore_threads(); 5913 #endif 5914 5915 /* 5916 * INIT the default VRF which for BSD is the only one, other O/S's 5917 * may have more. But initially they must start with one and then 5918 * add the VRF's as addresses are added. 5919 */ 5920 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5921 } 5922 5923 /* 5924 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5925 */ 5926 void 5927 sctp_pcb_finish(void) 5928 { 5929 struct sctp_vrflist *vrf_bucket; 5930 struct sctp_vrf *vrf, *nvrf; 5931 struct sctp_ifn *ifn, *nifn; 5932 struct sctp_ifa *ifa, *nifa; 5933 struct sctpvtaghead *chain; 5934 struct sctp_tagblock *twait_block, *prev_twait_block; 5935 struct sctp_laddr *wi, *nwi; 5936 int i; 5937 struct sctp_iterator *it, *nit; 5938 5939 /* 5940 * In FreeBSD the iterator thread never exits but we do clean up. 5941 * The only way FreeBSD reaches here is if we have VRF's but we 5942 * still add the ifdef to make it compile on old versions. 5943 */ 5944 SCTP_IPI_ITERATOR_WQ_LOCK(); 5945 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5946 if (it->vn != curvnet) { 5947 continue; 5948 } 5949 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5950 if (it->function_atend != NULL) { 5951 (*it->function_atend) (it->pointer, it->val); 5952 } 5953 SCTP_FREE(it, SCTP_M_ITER); 5954 } 5955 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5956 SCTP_ITERATOR_LOCK(); 5957 if ((sctp_it_ctl.cur_it) && 5958 (sctp_it_ctl.cur_it->vn == curvnet)) { 5959 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5960 } 5961 SCTP_ITERATOR_UNLOCK(); 5962 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5963 SCTP_WQ_ADDR_LOCK(); 5964 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5965 LIST_REMOVE(wi, sctp_nxt_addr); 5966 SCTP_DECR_LADDR_COUNT(); 5967 if (wi->action == SCTP_DEL_IP_ADDRESS) { 5968 SCTP_FREE(wi->ifa, SCTP_M_IFA); 5969 } 5970 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5971 } 5972 SCTP_WQ_ADDR_UNLOCK(); 5973 5974 /* 5975 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5976 * destroyed first). 5977 */ 5978 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5979 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5980 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5981 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5982 /* free the ifa */ 5983 LIST_REMOVE(ifa, next_bucket); 5984 LIST_REMOVE(ifa, next_ifa); 5985 SCTP_FREE(ifa, SCTP_M_IFA); 5986 } 5987 /* free the ifn */ 5988 LIST_REMOVE(ifn, next_bucket); 5989 LIST_REMOVE(ifn, next_ifn); 5990 SCTP_FREE(ifn, SCTP_M_IFN); 5991 } 5992 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5993 /* free the vrf */ 5994 LIST_REMOVE(vrf, next_vrf); 5995 SCTP_FREE(vrf, SCTP_M_VRF); 5996 } 5997 /* free the vrf hashes */ 5998 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 5999 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6000 6001 /* 6002 * free the TIMEWAIT list elements malloc'd in the function 6003 * sctp_add_vtag_to_timewait()... 6004 */ 6005 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6006 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6007 if (!LIST_EMPTY(chain)) { 6008 prev_twait_block = NULL; 6009 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6010 if (prev_twait_block) { 6011 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6012 } 6013 prev_twait_block = twait_block; 6014 } 6015 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6016 } 6017 } 6018 6019 /* free the locks and mutexes */ 6020 #ifdef SCTP_PACKET_LOGGING 6021 SCTP_IP_PKTLOG_DESTROY(); 6022 #endif 6023 SCTP_IPI_ADDR_DESTROY(); 6024 SCTP_STATLOG_DESTROY(); 6025 SCTP_INP_INFO_LOCK_DESTROY(); 6026 6027 SCTP_WQ_ADDR_DESTROY(); 6028 6029 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6030 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6031 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6032 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6033 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6034 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6035 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6036 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6037 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6038 /* Get rid of other stuff to */ 6039 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6040 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6041 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6042 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6043 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6044 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6045 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6046 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6047 #endif 6048 } 6049 6050 6051 int 6052 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6053 int offset, int limit, 6054 struct sockaddr *src, struct sockaddr *dst, 6055 struct sockaddr *altsa) 6056 { 6057 /* 6058 * grub through the INIT pulling addresses and loading them to the 6059 * nets structure in the asoc. The from address in the mbuf should 6060 * also be loaded (if it is not already). This routine can be called 6061 * with either INIT or INIT-ACK's as long as the m points to the IP 6062 * packet and the offset points to the beginning of the parameters. 6063 */ 6064 struct sctp_inpcb *inp; 6065 struct sctp_nets *net, *nnet, *net_tmp; 6066 struct sctp_paramhdr *phdr, parm_buf; 6067 struct sctp_tcb *stcb_tmp; 6068 uint16_t ptype, plen; 6069 struct sockaddr *sa; 6070 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6071 struct sctp_auth_random *p_random = NULL; 6072 uint16_t random_len = 0; 6073 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6074 struct sctp_auth_hmac_algo *hmacs = NULL; 6075 uint16_t hmacs_len = 0; 6076 uint8_t saw_asconf = 0; 6077 uint8_t saw_asconf_ack = 0; 6078 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6079 struct sctp_auth_chunk_list *chunks = NULL; 6080 uint16_t num_chunks = 0; 6081 sctp_key_t *new_key; 6082 uint32_t keylen; 6083 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6084 uint8_t peer_supports_ecn; 6085 uint8_t peer_supports_prsctp; 6086 uint8_t peer_supports_auth; 6087 uint8_t peer_supports_asconf; 6088 uint8_t peer_supports_asconf_ack; 6089 uint8_t peer_supports_reconfig; 6090 uint8_t peer_supports_nrsack; 6091 uint8_t peer_supports_pktdrop; 6092 6093 #ifdef INET 6094 struct sockaddr_in sin; 6095 6096 #endif 6097 #ifdef INET6 6098 struct sockaddr_in6 sin6; 6099 6100 #endif 6101 6102 /* First get the destination address setup too. */ 6103 #ifdef INET 6104 memset(&sin, 0, sizeof(sin)); 6105 sin.sin_family = AF_INET; 6106 sin.sin_len = sizeof(sin); 6107 sin.sin_port = stcb->rport; 6108 #endif 6109 #ifdef INET6 6110 memset(&sin6, 0, sizeof(sin6)); 6111 sin6.sin6_family = AF_INET6; 6112 sin6.sin6_len = sizeof(struct sockaddr_in6); 6113 sin6.sin6_port = stcb->rport; 6114 #endif 6115 if (altsa) { 6116 sa = altsa; 6117 } else { 6118 sa = src; 6119 } 6120 peer_supports_ecn = 0; 6121 peer_supports_prsctp = 0; 6122 peer_supports_auth = 0; 6123 peer_supports_asconf = 0; 6124 peer_supports_reconfig = 0; 6125 peer_supports_nrsack = 0; 6126 peer_supports_pktdrop = 0; 6127 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6128 /* mark all addresses that we have currently on the list */ 6129 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6130 } 6131 /* does the source address already exist? if so skip it */ 6132 inp = stcb->sctp_ep; 6133 atomic_add_int(&stcb->asoc.refcnt, 1); 6134 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6135 atomic_add_int(&stcb->asoc.refcnt, -1); 6136 6137 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6138 /* we must add the source address */ 6139 /* no scope set here since we have a tcb already. */ 6140 switch (sa->sa_family) { 6141 #ifdef INET 6142 case AF_INET: 6143 if (stcb->asoc.scope.ipv4_addr_legal) { 6144 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6145 return (-1); 6146 } 6147 } 6148 break; 6149 #endif 6150 #ifdef INET6 6151 case AF_INET6: 6152 if (stcb->asoc.scope.ipv6_addr_legal) { 6153 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6154 return (-2); 6155 } 6156 } 6157 break; 6158 #endif 6159 default: 6160 break; 6161 } 6162 } else { 6163 if (net_tmp != NULL && stcb_tmp == stcb) { 6164 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6165 } else if (stcb_tmp != stcb) { 6166 /* It belongs to another association? */ 6167 if (stcb_tmp) 6168 SCTP_TCB_UNLOCK(stcb_tmp); 6169 return (-3); 6170 } 6171 } 6172 if (stcb->asoc.state == 0) { 6173 /* the assoc was freed? */ 6174 return (-4); 6175 } 6176 /* now we must go through each of the params. */ 6177 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6178 while (phdr) { 6179 ptype = ntohs(phdr->param_type); 6180 plen = ntohs(phdr->param_length); 6181 /* 6182 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6183 * (uint32_t)ptype, (int)plen); 6184 */ 6185 if (offset + plen > limit) { 6186 break; 6187 } 6188 if (plen == 0) { 6189 break; 6190 } 6191 #ifdef INET 6192 if (ptype == SCTP_IPV4_ADDRESS) { 6193 if (stcb->asoc.scope.ipv4_addr_legal) { 6194 struct sctp_ipv4addr_param *p4, p4_buf; 6195 6196 /* ok get the v4 address and check/add */ 6197 phdr = sctp_get_next_param(m, offset, 6198 (struct sctp_paramhdr *)&p4_buf, 6199 sizeof(p4_buf)); 6200 if (plen != sizeof(struct sctp_ipv4addr_param) || 6201 phdr == NULL) { 6202 return (-5); 6203 } 6204 p4 = (struct sctp_ipv4addr_param *)phdr; 6205 sin.sin_addr.s_addr = p4->addr; 6206 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6207 /* Skip multi-cast addresses */ 6208 goto next_param; 6209 } 6210 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6211 (sin.sin_addr.s_addr == INADDR_ANY)) { 6212 goto next_param; 6213 } 6214 sa = (struct sockaddr *)&sin; 6215 inp = stcb->sctp_ep; 6216 atomic_add_int(&stcb->asoc.refcnt, 1); 6217 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6218 dst, stcb); 6219 atomic_add_int(&stcb->asoc.refcnt, -1); 6220 6221 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6222 inp == NULL) { 6223 /* we must add the source address */ 6224 /* 6225 * no scope set since we have a tcb 6226 * already 6227 */ 6228 6229 /* 6230 * we must validate the state again 6231 * here 6232 */ 6233 add_it_now: 6234 if (stcb->asoc.state == 0) { 6235 /* the assoc was freed? */ 6236 return (-7); 6237 } 6238 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6239 return (-8); 6240 } 6241 } else if (stcb_tmp == stcb) { 6242 if (stcb->asoc.state == 0) { 6243 /* the assoc was freed? */ 6244 return (-10); 6245 } 6246 if (net != NULL) { 6247 /* clear flag */ 6248 net->dest_state &= 6249 ~SCTP_ADDR_NOT_IN_ASSOC; 6250 } 6251 } else { 6252 /* 6253 * strange, address is in another 6254 * assoc? straighten out locks. 6255 */ 6256 if (stcb_tmp) { 6257 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6258 /* 6259 * in setup state we 6260 * abort this guy 6261 */ 6262 sctp_abort_an_association(stcb_tmp->sctp_ep, 6263 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6264 goto add_it_now; 6265 } 6266 SCTP_TCB_UNLOCK(stcb_tmp); 6267 } 6268 if (stcb->asoc.state == 0) { 6269 /* the assoc was freed? */ 6270 return (-12); 6271 } 6272 return (-13); 6273 } 6274 } 6275 } else 6276 #endif 6277 #ifdef INET6 6278 if (ptype == SCTP_IPV6_ADDRESS) { 6279 if (stcb->asoc.scope.ipv6_addr_legal) { 6280 /* ok get the v6 address and check/add */ 6281 struct sctp_ipv6addr_param *p6, p6_buf; 6282 6283 phdr = sctp_get_next_param(m, offset, 6284 (struct sctp_paramhdr *)&p6_buf, 6285 sizeof(p6_buf)); 6286 if (plen != sizeof(struct sctp_ipv6addr_param) || 6287 phdr == NULL) { 6288 return (-14); 6289 } 6290 p6 = (struct sctp_ipv6addr_param *)phdr; 6291 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6292 sizeof(p6->addr)); 6293 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6294 /* Skip multi-cast addresses */ 6295 goto next_param; 6296 } 6297 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6298 /* 6299 * Link local make no sense without 6300 * scope 6301 */ 6302 goto next_param; 6303 } 6304 sa = (struct sockaddr *)&sin6; 6305 inp = stcb->sctp_ep; 6306 atomic_add_int(&stcb->asoc.refcnt, 1); 6307 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6308 dst, stcb); 6309 atomic_add_int(&stcb->asoc.refcnt, -1); 6310 if (stcb_tmp == NULL && 6311 (inp == stcb->sctp_ep || inp == NULL)) { 6312 /* 6313 * we must validate the state again 6314 * here 6315 */ 6316 add_it_now6: 6317 if (stcb->asoc.state == 0) { 6318 /* the assoc was freed? */ 6319 return (-16); 6320 } 6321 /* 6322 * we must add the address, no scope 6323 * set 6324 */ 6325 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6326 return (-17); 6327 } 6328 } else if (stcb_tmp == stcb) { 6329 /* 6330 * we must validate the state again 6331 * here 6332 */ 6333 if (stcb->asoc.state == 0) { 6334 /* the assoc was freed? */ 6335 return (-19); 6336 } 6337 if (net != NULL) { 6338 /* clear flag */ 6339 net->dest_state &= 6340 ~SCTP_ADDR_NOT_IN_ASSOC; 6341 } 6342 } else { 6343 /* 6344 * strange, address is in another 6345 * assoc? straighten out locks. 6346 */ 6347 if (stcb_tmp) 6348 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6349 /* 6350 * in setup state we 6351 * abort this guy 6352 */ 6353 sctp_abort_an_association(stcb_tmp->sctp_ep, 6354 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6355 goto add_it_now6; 6356 } 6357 SCTP_TCB_UNLOCK(stcb_tmp); 6358 6359 if (stcb->asoc.state == 0) { 6360 /* the assoc was freed? */ 6361 return (-21); 6362 } 6363 return (-22); 6364 } 6365 } 6366 } else 6367 #endif 6368 if (ptype == SCTP_ECN_CAPABLE) { 6369 peer_supports_ecn = 1; 6370 } else if (ptype == SCTP_ULP_ADAPTATION) { 6371 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6372 struct sctp_adaptation_layer_indication ai, 6373 *aip; 6374 6375 phdr = sctp_get_next_param(m, offset, 6376 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6377 aip = (struct sctp_adaptation_layer_indication *)phdr; 6378 if (aip) { 6379 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6380 stcb->asoc.adaptation_needed = 1; 6381 } 6382 } 6383 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6384 struct sctp_asconf_addr_param lstore, *fee; 6385 int lptype; 6386 struct sockaddr *lsa = NULL; 6387 6388 #ifdef INET 6389 struct sctp_asconf_addrv4_param *fii; 6390 6391 #endif 6392 6393 if (stcb->asoc.asconf_supported == 0) { 6394 return (-100); 6395 } 6396 if (plen > sizeof(lstore)) { 6397 return (-23); 6398 } 6399 phdr = sctp_get_next_param(m, offset, 6400 (struct sctp_paramhdr *)&lstore, 6401 min(plen, sizeof(lstore))); 6402 if (phdr == NULL) { 6403 return (-24); 6404 } 6405 fee = (struct sctp_asconf_addr_param *)phdr; 6406 lptype = ntohs(fee->addrp.ph.param_type); 6407 switch (lptype) { 6408 #ifdef INET 6409 case SCTP_IPV4_ADDRESS: 6410 if (plen != 6411 sizeof(struct sctp_asconf_addrv4_param)) { 6412 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6413 (int)sizeof(struct sctp_asconf_addrv4_param), 6414 plen); 6415 } else { 6416 fii = (struct sctp_asconf_addrv4_param *)fee; 6417 sin.sin_addr.s_addr = fii->addrp.addr; 6418 lsa = (struct sockaddr *)&sin; 6419 } 6420 break; 6421 #endif 6422 #ifdef INET6 6423 case SCTP_IPV6_ADDRESS: 6424 if (plen != 6425 sizeof(struct sctp_asconf_addr_param)) { 6426 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6427 (int)sizeof(struct sctp_asconf_addr_param), 6428 plen); 6429 } else { 6430 memcpy(sin6.sin6_addr.s6_addr, 6431 fee->addrp.addr, 6432 sizeof(fee->addrp.addr)); 6433 lsa = (struct sockaddr *)&sin6; 6434 } 6435 break; 6436 #endif 6437 default: 6438 break; 6439 } 6440 if (lsa) { 6441 (void)sctp_set_primary_addr(stcb, sa, NULL); 6442 } 6443 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6444 stcb->asoc.peer_supports_nat = 1; 6445 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6446 /* Peer supports pr-sctp */ 6447 peer_supports_prsctp = 1; 6448 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6449 /* A supported extension chunk */ 6450 struct sctp_supported_chunk_types_param *pr_supported; 6451 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6452 int num_ent, i; 6453 6454 phdr = sctp_get_next_param(m, offset, 6455 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6456 if (phdr == NULL) { 6457 return (-25); 6458 } 6459 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6460 num_ent = plen - sizeof(struct sctp_paramhdr); 6461 for (i = 0; i < num_ent; i++) { 6462 switch (pr_supported->chunk_types[i]) { 6463 case SCTP_ASCONF: 6464 peer_supports_asconf = 1; 6465 break; 6466 case SCTP_ASCONF_ACK: 6467 peer_supports_asconf_ack = 1; 6468 break; 6469 case SCTP_FORWARD_CUM_TSN: 6470 peer_supports_prsctp = 1; 6471 break; 6472 case SCTP_PACKET_DROPPED: 6473 peer_supports_pktdrop = 1; 6474 break; 6475 case SCTP_NR_SELECTIVE_ACK: 6476 peer_supports_nrsack = 1; 6477 break; 6478 case SCTP_STREAM_RESET: 6479 peer_supports_reconfig = 1; 6480 break; 6481 case SCTP_AUTHENTICATION: 6482 peer_supports_auth = 1; 6483 break; 6484 default: 6485 /* one I have not learned yet */ 6486 break; 6487 6488 } 6489 } 6490 } else if (ptype == SCTP_RANDOM) { 6491 if (plen > sizeof(random_store)) 6492 break; 6493 if (got_random) { 6494 /* already processed a RANDOM */ 6495 goto next_param; 6496 } 6497 phdr = sctp_get_next_param(m, offset, 6498 (struct sctp_paramhdr *)random_store, 6499 min(sizeof(random_store), plen)); 6500 if (phdr == NULL) 6501 return (-26); 6502 p_random = (struct sctp_auth_random *)phdr; 6503 random_len = plen - sizeof(*p_random); 6504 /* enforce the random length */ 6505 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6506 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6507 return (-27); 6508 } 6509 got_random = 1; 6510 } else if (ptype == SCTP_HMAC_LIST) { 6511 uint16_t num_hmacs; 6512 uint16_t i; 6513 6514 if (plen > sizeof(hmacs_store)) 6515 break; 6516 if (got_hmacs) { 6517 /* already processed a HMAC list */ 6518 goto next_param; 6519 } 6520 phdr = sctp_get_next_param(m, offset, 6521 (struct sctp_paramhdr *)hmacs_store, 6522 min(plen, sizeof(hmacs_store))); 6523 if (phdr == NULL) 6524 return (-28); 6525 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6526 hmacs_len = plen - sizeof(*hmacs); 6527 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6528 /* validate the hmac list */ 6529 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6530 return (-29); 6531 } 6532 if (stcb->asoc.peer_hmacs != NULL) 6533 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6534 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6535 if (stcb->asoc.peer_hmacs != NULL) { 6536 for (i = 0; i < num_hmacs; i++) { 6537 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6538 ntohs(hmacs->hmac_ids[i])); 6539 } 6540 } 6541 got_hmacs = 1; 6542 } else if (ptype == SCTP_CHUNK_LIST) { 6543 int i; 6544 6545 if (plen > sizeof(chunks_store)) 6546 break; 6547 if (got_chklist) { 6548 /* already processed a Chunks list */ 6549 goto next_param; 6550 } 6551 phdr = sctp_get_next_param(m, offset, 6552 (struct sctp_paramhdr *)chunks_store, 6553 min(plen, sizeof(chunks_store))); 6554 if (phdr == NULL) 6555 return (-30); 6556 chunks = (struct sctp_auth_chunk_list *)phdr; 6557 num_chunks = plen - sizeof(*chunks); 6558 if (stcb->asoc.peer_auth_chunks != NULL) 6559 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6560 else 6561 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6562 for (i = 0; i < num_chunks; i++) { 6563 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6564 stcb->asoc.peer_auth_chunks); 6565 /* record asconf/asconf-ack if listed */ 6566 if (chunks->chunk_types[i] == SCTP_ASCONF) 6567 saw_asconf = 1; 6568 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6569 saw_asconf_ack = 1; 6570 6571 } 6572 got_chklist = 1; 6573 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6574 (ptype == SCTP_STATE_COOKIE) || 6575 (ptype == SCTP_UNRECOG_PARAM) || 6576 (ptype == SCTP_COOKIE_PRESERVE) || 6577 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6578 (ptype == SCTP_ADD_IP_ADDRESS) || 6579 (ptype == SCTP_DEL_IP_ADDRESS) || 6580 (ptype == SCTP_ERROR_CAUSE_IND) || 6581 (ptype == SCTP_SUCCESS_REPORT)) { 6582 /* don't care */ ; 6583 } else { 6584 if ((ptype & 0x8000) == 0x0000) { 6585 /* 6586 * must stop processing the rest of the 6587 * param's. Any report bits were handled 6588 * with the call to 6589 * sctp_arethere_unrecognized_parameters() 6590 * when the INIT or INIT-ACK was first seen. 6591 */ 6592 break; 6593 } 6594 } 6595 6596 next_param: 6597 offset += SCTP_SIZE32(plen); 6598 if (offset >= limit) { 6599 break; 6600 } 6601 phdr = sctp_get_next_param(m, offset, &parm_buf, 6602 sizeof(parm_buf)); 6603 } 6604 /* Now check to see if we need to purge any addresses */ 6605 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6606 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6607 SCTP_ADDR_NOT_IN_ASSOC) { 6608 /* This address has been removed from the asoc */ 6609 /* remove and free it */ 6610 stcb->asoc.numnets--; 6611 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6612 sctp_free_remote_addr(net); 6613 if (net == stcb->asoc.primary_destination) { 6614 stcb->asoc.primary_destination = NULL; 6615 sctp_select_primary_destination(stcb); 6616 } 6617 } 6618 } 6619 if ((stcb->asoc.ecn_supported == 1) && 6620 (peer_supports_ecn == 0)) { 6621 stcb->asoc.ecn_supported = 0; 6622 } 6623 if ((stcb->asoc.prsctp_supported == 1) && 6624 (peer_supports_prsctp == 0)) { 6625 stcb->asoc.prsctp_supported = 0; 6626 } 6627 if ((stcb->asoc.auth_supported == 1) && 6628 ((peer_supports_auth == 0) || 6629 (got_random == 0) || (got_hmacs == 0))) { 6630 stcb->asoc.auth_supported = 0; 6631 } 6632 if ((stcb->asoc.asconf_supported == 1) && 6633 ((peer_supports_asconf == 0) || (peer_supports_asconf_ack == 0) || 6634 (stcb->asoc.auth_supported == 0) || 6635 (saw_asconf == 0) || (saw_asconf_ack == 0))) { 6636 stcb->asoc.asconf_supported = 0; 6637 } 6638 if ((stcb->asoc.reconfig_supported == 1) && 6639 (peer_supports_reconfig == 0)) { 6640 stcb->asoc.reconfig_supported = 0; 6641 } 6642 if ((stcb->asoc.nrsack_supported == 1) && 6643 (peer_supports_nrsack == 0)) { 6644 stcb->asoc.nrsack_supported = 0; 6645 } 6646 if ((stcb->asoc.pktdrop_supported == 1) && 6647 (peer_supports_pktdrop == 0)) { 6648 stcb->asoc.pktdrop_supported = 0; 6649 } 6650 /* validate authentication required parameters */ 6651 if ((peer_supports_auth == 0) && (got_chklist == 1)) { 6652 /* peer does not support auth but sent a chunks list? */ 6653 return (-31); 6654 } 6655 if ((peer_supports_asconf == 1) && (peer_supports_auth == 0)) { 6656 /* peer supports asconf but not auth? */ 6657 return (-32); 6658 } else if ((peer_supports_asconf == 1) && 6659 (peer_supports_auth == 1) && 6660 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6661 return (-33); 6662 } 6663 /* concatenate the full random key */ 6664 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6665 if (chunks != NULL) { 6666 keylen += sizeof(*chunks) + num_chunks; 6667 } 6668 new_key = sctp_alloc_key(keylen); 6669 if (new_key != NULL) { 6670 /* copy in the RANDOM */ 6671 if (p_random != NULL) { 6672 keylen = sizeof(*p_random) + random_len; 6673 bcopy(p_random, new_key->key, keylen); 6674 } 6675 /* append in the AUTH chunks */ 6676 if (chunks != NULL) { 6677 bcopy(chunks, new_key->key + keylen, 6678 sizeof(*chunks) + num_chunks); 6679 keylen += sizeof(*chunks) + num_chunks; 6680 } 6681 /* append in the HMACs */ 6682 if (hmacs != NULL) { 6683 bcopy(hmacs, new_key->key + keylen, 6684 sizeof(*hmacs) + hmacs_len); 6685 } 6686 } else { 6687 /* failed to get memory for the key */ 6688 return (-34); 6689 } 6690 if (stcb->asoc.authinfo.peer_random != NULL) 6691 sctp_free_key(stcb->asoc.authinfo.peer_random); 6692 stcb->asoc.authinfo.peer_random = new_key; 6693 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6694 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6695 6696 return (0); 6697 } 6698 6699 int 6700 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6701 struct sctp_nets *net) 6702 { 6703 /* make sure the requested primary address exists in the assoc */ 6704 if (net == NULL && sa) 6705 net = sctp_findnet(stcb, sa); 6706 6707 if (net == NULL) { 6708 /* didn't find the requested primary address! */ 6709 return (-1); 6710 } else { 6711 /* set the primary address */ 6712 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6713 /* Must be confirmed, so queue to set */ 6714 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6715 return (0); 6716 } 6717 stcb->asoc.primary_destination = net; 6718 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6719 sctp_free_remote_addr(stcb->asoc.alternate); 6720 stcb->asoc.alternate = NULL; 6721 } 6722 net = TAILQ_FIRST(&stcb->asoc.nets); 6723 if (net != stcb->asoc.primary_destination) { 6724 /* 6725 * first one on the list is NOT the primary 6726 * sctp_cmpaddr() is much more efficient if the 6727 * primary is the first on the list, make it so. 6728 */ 6729 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6730 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6731 } 6732 return (0); 6733 } 6734 } 6735 6736 int 6737 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6738 { 6739 /* 6740 * This function serves two purposes. It will see if a TAG can be 6741 * re-used and return 1 for yes it is ok and 0 for don't use that 6742 * tag. A secondary function it will do is purge out old tags that 6743 * can be removed. 6744 */ 6745 struct sctpvtaghead *chain; 6746 struct sctp_tagblock *twait_block; 6747 struct sctpasochead *head; 6748 struct sctp_tcb *stcb; 6749 int i; 6750 6751 SCTP_INP_INFO_RLOCK(); 6752 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6753 SCTP_BASE_INFO(hashasocmark))]; 6754 if (head == NULL) { 6755 /* invalid vtag */ 6756 goto skip_vtag_check; 6757 } 6758 LIST_FOREACH(stcb, head, sctp_asocs) { 6759 /* 6760 * We choose not to lock anything here. TCB's can't be 6761 * removed since we have the read lock, so they can't be 6762 * freed on us, same thing for the INP. I may be wrong with 6763 * this assumption, but we will go with it for now :-) 6764 */ 6765 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6766 continue; 6767 } 6768 if (stcb->asoc.my_vtag == tag) { 6769 /* candidate */ 6770 if (stcb->rport != rport) { 6771 continue; 6772 } 6773 if (stcb->sctp_ep->sctp_lport != lport) { 6774 continue; 6775 } 6776 /* Its a used tag set */ 6777 SCTP_INP_INFO_RUNLOCK(); 6778 return (0); 6779 } 6780 } 6781 skip_vtag_check: 6782 6783 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6784 /* Now what about timed wait ? */ 6785 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6786 /* 6787 * Block(s) are present, lets see if we have this tag in the 6788 * list 6789 */ 6790 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6791 if (twait_block->vtag_block[i].v_tag == 0) { 6792 /* not used */ 6793 continue; 6794 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6795 now->tv_sec) { 6796 /* Audit expires this guy */ 6797 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6798 twait_block->vtag_block[i].v_tag = 0; 6799 twait_block->vtag_block[i].lport = 0; 6800 twait_block->vtag_block[i].rport = 0; 6801 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6802 (twait_block->vtag_block[i].lport == lport) && 6803 (twait_block->vtag_block[i].rport == rport)) { 6804 /* Bad tag, sorry :< */ 6805 SCTP_INP_INFO_RUNLOCK(); 6806 return (0); 6807 } 6808 } 6809 } 6810 SCTP_INP_INFO_RUNLOCK(); 6811 return (1); 6812 } 6813 6814 static void 6815 sctp_drain_mbufs(struct sctp_tcb *stcb) 6816 { 6817 /* 6818 * We must hunt this association for MBUF's past the cumack (i.e. 6819 * out of order data that we can renege on). 6820 */ 6821 struct sctp_association *asoc; 6822 struct sctp_tmit_chunk *chk, *nchk; 6823 uint32_t cumulative_tsn_p1; 6824 struct sctp_queued_to_read *ctl, *nctl; 6825 int cnt, strmat; 6826 uint32_t gap, i; 6827 int fnd = 0; 6828 6829 /* We look for anything larger than the cum-ack + 1 */ 6830 6831 asoc = &stcb->asoc; 6832 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6833 /* none we can reneg on. */ 6834 return; 6835 } 6836 SCTP_STAT_INCR(sctps_protocol_drains_done); 6837 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6838 cnt = 0; 6839 /* First look in the re-assembly queue */ 6840 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6841 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6842 /* Yep it is above cum-ack */ 6843 cnt++; 6844 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6845 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6846 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6847 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6848 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6849 if (chk->data) { 6850 sctp_m_freem(chk->data); 6851 chk->data = NULL; 6852 } 6853 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6854 } 6855 } 6856 /* Ok that was fun, now we will drain all the inbound streams? */ 6857 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6858 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6859 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6860 /* Yep it is above cum-ack */ 6861 cnt++; 6862 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6863 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6864 sctp_ucount_decr(asoc->cnt_on_all_streams); 6865 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6866 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6867 if (ctl->data) { 6868 sctp_m_freem(ctl->data); 6869 ctl->data = NULL; 6870 } 6871 sctp_free_remote_addr(ctl->whoFrom); 6872 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6873 SCTP_DECR_READQ_COUNT(); 6874 } 6875 } 6876 } 6877 if (cnt) { 6878 /* We must back down to see what the new highest is */ 6879 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6880 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6881 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6882 asoc->highest_tsn_inside_map = i; 6883 fnd = 1; 6884 break; 6885 } 6886 } 6887 if (!fnd) { 6888 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6889 } 6890 /* 6891 * Question, should we go through the delivery queue? The 6892 * only reason things are on here is the app not reading OR 6893 * a p-d-api up. An attacker COULD send enough in to 6894 * initiate the PD-API and then send a bunch of stuff to 6895 * other streams... these would wind up on the delivery 6896 * queue.. and then we would not get to them. But in order 6897 * to do this I then have to back-track and un-deliver 6898 * sequence numbers in streams.. el-yucko. I think for now 6899 * we will NOT look at the delivery queue and leave it to be 6900 * something to consider later. An alternative would be to 6901 * abort the P-D-API with a notification and then deliver 6902 * the data.... Or another method might be to keep track of 6903 * how many times the situation occurs and if we see a 6904 * possible attack underway just abort the association. 6905 */ 6906 #ifdef SCTP_DEBUG 6907 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6908 #endif 6909 /* 6910 * Now do we need to find a new 6911 * asoc->highest_tsn_inside_map? 6912 */ 6913 asoc->last_revoke_count = cnt; 6914 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6915 /* sa_ignore NO_NULL_CHK */ 6916 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6917 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6918 } 6919 /* 6920 * Another issue, in un-setting the TSN's in the mapping array we 6921 * DID NOT adjust the highest_tsn marker. This will cause one of 6922 * two things to occur. It may cause us to do extra work in checking 6923 * for our mapping array movement. More importantly it may cause us 6924 * to SACK every datagram. This may not be a bad thing though since 6925 * we will recover once we get our cum-ack above and all this stuff 6926 * we dumped recovered. 6927 */ 6928 } 6929 6930 void 6931 sctp_drain() 6932 { 6933 /* 6934 * We must walk the PCB lists for ALL associations here. The system 6935 * is LOW on MBUF's and needs help. This is where reneging will 6936 * occur. We really hope this does NOT happen! 6937 */ 6938 VNET_ITERATOR_DECL(vnet_iter); 6939 VNET_LIST_RLOCK_NOSLEEP(); 6940 VNET_FOREACH(vnet_iter) { 6941 CURVNET_SET(vnet_iter); 6942 struct sctp_inpcb *inp; 6943 struct sctp_tcb *stcb; 6944 6945 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6946 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6947 #ifdef VIMAGE 6948 continue; 6949 #else 6950 return; 6951 #endif 6952 } 6953 SCTP_INP_INFO_RLOCK(); 6954 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6955 /* For each endpoint */ 6956 SCTP_INP_RLOCK(inp); 6957 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6958 /* For each association */ 6959 SCTP_TCB_LOCK(stcb); 6960 sctp_drain_mbufs(stcb); 6961 SCTP_TCB_UNLOCK(stcb); 6962 } 6963 SCTP_INP_RUNLOCK(inp); 6964 } 6965 SCTP_INP_INFO_RUNLOCK(); 6966 CURVNET_RESTORE(); 6967 } 6968 VNET_LIST_RUNLOCK_NOSLEEP(); 6969 } 6970 6971 /* 6972 * start a new iterator 6973 * iterates through all endpoints and associations based on the pcb_state 6974 * flags and asoc_state. "af" (mandatory) is executed for all matching 6975 * assocs and "ef" (optional) is executed when the iterator completes. 6976 * "inpf" (optional) is executed for each new endpoint as it is being 6977 * iterated through. inpe (optional) is called when the inp completes 6978 * its way through all the stcbs. 6979 */ 6980 int 6981 sctp_initiate_iterator(inp_func inpf, 6982 asoc_func af, 6983 inp_func inpe, 6984 uint32_t pcb_state, 6985 uint32_t pcb_features, 6986 uint32_t asoc_state, 6987 void *argp, 6988 uint32_t argi, 6989 end_func ef, 6990 struct sctp_inpcb *s_inp, 6991 uint8_t chunk_output_off) 6992 { 6993 struct sctp_iterator *it = NULL; 6994 6995 if (af == NULL) { 6996 return (-1); 6997 } 6998 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6999 SCTP_M_ITER); 7000 if (it == NULL) { 7001 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 7002 return (ENOMEM); 7003 } 7004 memset(it, 0, sizeof(*it)); 7005 it->function_assoc = af; 7006 it->function_inp = inpf; 7007 if (inpf) 7008 it->done_current_ep = 0; 7009 else 7010 it->done_current_ep = 1; 7011 it->function_atend = ef; 7012 it->pointer = argp; 7013 it->val = argi; 7014 it->pcb_flags = pcb_state; 7015 it->pcb_features = pcb_features; 7016 it->asoc_state = asoc_state; 7017 it->function_inp_end = inpe; 7018 it->no_chunk_output = chunk_output_off; 7019 it->vn = curvnet; 7020 if (s_inp) { 7021 /* Assume lock is held here */ 7022 it->inp = s_inp; 7023 SCTP_INP_INCR_REF(it->inp); 7024 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7025 } else { 7026 SCTP_INP_INFO_RLOCK(); 7027 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7028 if (it->inp) { 7029 SCTP_INP_INCR_REF(it->inp); 7030 } 7031 SCTP_INP_INFO_RUNLOCK(); 7032 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7033 7034 } 7035 SCTP_IPI_ITERATOR_WQ_LOCK(); 7036 7037 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7038 if (sctp_it_ctl.iterator_running == 0) { 7039 sctp_wakeup_iterator(); 7040 } 7041 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7042 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7043 return (0); 7044 } 7045