1 /*- 2 * Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2008-2012, by Randall Stewart. All rights reserved. 4 * Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * a) Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * b) Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the distribution. 15 * 16 * c) Neither the name of Cisco Systems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <netinet/sctp_os.h> 37 #include <sys/proc.h> 38 #include <netinet/sctp_var.h> 39 #include <netinet/sctp_sysctl.h> 40 #include <netinet/sctp_pcb.h> 41 #include <netinet/sctputil.h> 42 #include <netinet/sctp.h> 43 #include <netinet/sctp_header.h> 44 #include <netinet/sctp_asconf.h> 45 #include <netinet/sctp_output.h> 46 #include <netinet/sctp_timer.h> 47 #include <netinet/sctp_bsd_addr.h> 48 #include <netinet/sctp_dtrace_define.h> 49 #if defined(INET) || defined(INET6) 50 #include <netinet/udp.h> 51 #endif 52 #ifdef INET6 53 #include <netinet6/ip6_var.h> 54 #endif 55 #include <sys/sched.h> 56 #include <sys/smp.h> 57 #include <sys/unistd.h> 58 59 60 VNET_DEFINE(struct sctp_base_info, system_base_info); 61 62 /* FIX: we don't handle multiple link local scopes */ 63 /* "scopeless" replacement IN6_ARE_ADDR_EQUAL */ 64 #ifdef INET6 65 int 66 SCTP6_ARE_ADDR_EQUAL(struct sockaddr_in6 *a, struct sockaddr_in6 *b) 67 { 68 struct sockaddr_in6 tmp_a, tmp_b; 69 70 memcpy(&tmp_a, a, sizeof(struct sockaddr_in6)); 71 if (sa6_embedscope(&tmp_a, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 72 return (0); 73 } 74 memcpy(&tmp_b, b, sizeof(struct sockaddr_in6)); 75 if (sa6_embedscope(&tmp_b, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 76 return (0); 77 } 78 return (IN6_ARE_ADDR_EQUAL(&tmp_a.sin6_addr, &tmp_b.sin6_addr)); 79 } 80 81 #endif 82 83 void 84 sctp_fill_pcbinfo(struct sctp_pcbinfo *spcb) 85 { 86 /* 87 * We really don't need to lock this, but I will just because it 88 * does not hurt. 89 */ 90 SCTP_INP_INFO_RLOCK(); 91 spcb->ep_count = SCTP_BASE_INFO(ipi_count_ep); 92 spcb->asoc_count = SCTP_BASE_INFO(ipi_count_asoc); 93 spcb->laddr_count = SCTP_BASE_INFO(ipi_count_laddr); 94 spcb->raddr_count = SCTP_BASE_INFO(ipi_count_raddr); 95 spcb->chk_count = SCTP_BASE_INFO(ipi_count_chunk); 96 spcb->readq_count = SCTP_BASE_INFO(ipi_count_readq); 97 spcb->stream_oque = SCTP_BASE_INFO(ipi_count_strmoq); 98 spcb->free_chunks = SCTP_BASE_INFO(ipi_free_chunks); 99 SCTP_INP_INFO_RUNLOCK(); 100 } 101 102 /*- 103 * Addresses are added to VRF's (Virtual Router's). For BSD we 104 * have only the default VRF 0. We maintain a hash list of 105 * VRF's. Each VRF has its own list of sctp_ifn's. Each of 106 * these has a list of addresses. When we add a new address 107 * to a VRF we lookup the ifn/ifn_index, if the ifn does 108 * not exist we create it and add it to the list of IFN's 109 * within the VRF. Once we have the sctp_ifn, we add the 110 * address to the list. So we look something like: 111 * 112 * hash-vrf-table 113 * vrf-> ifn-> ifn -> ifn 114 * vrf | 115 * ... +--ifa-> ifa -> ifa 116 * vrf 117 * 118 * We keep these separate lists since the SCTP subsystem will 119 * point to these from its source address selection nets structure. 120 * When an address is deleted it does not happen right away on 121 * the SCTP side, it gets scheduled. What we do when a 122 * delete happens is immediately remove the address from 123 * the master list and decrement the refcount. As our 124 * addip iterator works through and frees the src address 125 * selection pointing to the sctp_ifa, eventually the refcount 126 * will reach 0 and we will delete it. Note that it is assumed 127 * that any locking on system level ifn/ifa is done at the 128 * caller of these functions and these routines will only 129 * lock the SCTP structures as they add or delete things. 130 * 131 * Other notes on VRF concepts. 132 * - An endpoint can be in multiple VRF's 133 * - An association lives within a VRF and only one VRF. 134 * - Any incoming packet we can deduce the VRF for by 135 * looking at the mbuf/pak inbound (for BSD its VRF=0 :D) 136 * - Any downward send call or connect call must supply the 137 * VRF via ancillary data or via some sort of set default 138 * VRF socket option call (again for BSD no brainer since 139 * the VRF is always 0). 140 * - An endpoint may add multiple VRF's to it. 141 * - Listening sockets can accept associations in any 142 * of the VRF's they are in but the assoc will end up 143 * in only one VRF (gotten from the packet or connect/send). 144 * 145 */ 146 147 struct sctp_vrf * 148 sctp_allocate_vrf(int vrf_id) 149 { 150 struct sctp_vrf *vrf = NULL; 151 struct sctp_vrflist *bucket; 152 153 /* First allocate the VRF structure */ 154 vrf = sctp_find_vrf(vrf_id); 155 if (vrf) { 156 /* Already allocated */ 157 return (vrf); 158 } 159 SCTP_MALLOC(vrf, struct sctp_vrf *, sizeof(struct sctp_vrf), 160 SCTP_M_VRF); 161 if (vrf == NULL) { 162 /* No memory */ 163 #ifdef INVARIANTS 164 panic("No memory for VRF:%d", vrf_id); 165 #endif 166 return (NULL); 167 } 168 /* setup the VRF */ 169 memset(vrf, 0, sizeof(struct sctp_vrf)); 170 vrf->vrf_id = vrf_id; 171 LIST_INIT(&vrf->ifnlist); 172 vrf->total_ifa_count = 0; 173 vrf->refcount = 0; 174 /* now also setup table ids */ 175 SCTP_INIT_VRF_TABLEID(vrf); 176 /* Init the HASH of addresses */ 177 vrf->vrf_addr_hash = SCTP_HASH_INIT(SCTP_VRF_ADDR_HASH_SIZE, 178 &vrf->vrf_addr_hashmark); 179 if (vrf->vrf_addr_hash == NULL) { 180 /* No memory */ 181 #ifdef INVARIANTS 182 panic("No memory for VRF:%d", vrf_id); 183 #endif 184 SCTP_FREE(vrf, SCTP_M_VRF); 185 return (NULL); 186 } 187 /* Add it to the hash table */ 188 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 189 LIST_INSERT_HEAD(bucket, vrf, next_vrf); 190 atomic_add_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 191 return (vrf); 192 } 193 194 195 struct sctp_ifn * 196 sctp_find_ifn(void *ifn, uint32_t ifn_index) 197 { 198 struct sctp_ifn *sctp_ifnp; 199 struct sctp_ifnlist *hash_ifn_head; 200 201 /* 202 * We assume the lock is held for the addresses if that's wrong 203 * problems could occur :-) 204 */ 205 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 206 LIST_FOREACH(sctp_ifnp, hash_ifn_head, next_bucket) { 207 if (sctp_ifnp->ifn_index == ifn_index) { 208 return (sctp_ifnp); 209 } 210 if (sctp_ifnp->ifn_p && ifn && (sctp_ifnp->ifn_p == ifn)) { 211 return (sctp_ifnp); 212 } 213 } 214 return (NULL); 215 } 216 217 218 struct sctp_vrf * 219 sctp_find_vrf(uint32_t vrf_id) 220 { 221 struct sctp_vrflist *bucket; 222 struct sctp_vrf *liste; 223 224 bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(vrf_id & SCTP_BASE_INFO(hashvrfmark))]; 225 LIST_FOREACH(liste, bucket, next_vrf) { 226 if (vrf_id == liste->vrf_id) { 227 return (liste); 228 } 229 } 230 return (NULL); 231 } 232 233 234 void 235 sctp_free_vrf(struct sctp_vrf *vrf) 236 { 237 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&vrf->refcount)) { 238 if (vrf->vrf_addr_hash) { 239 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 240 vrf->vrf_addr_hash = NULL; 241 } 242 /* We zero'd the count */ 243 LIST_REMOVE(vrf, next_vrf); 244 SCTP_FREE(vrf, SCTP_M_VRF); 245 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_vrfs), 1); 246 } 247 } 248 249 250 void 251 sctp_free_ifn(struct sctp_ifn *sctp_ifnp) 252 { 253 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifnp->refcount)) { 254 /* We zero'd the count */ 255 if (sctp_ifnp->vrf) { 256 sctp_free_vrf(sctp_ifnp->vrf); 257 } 258 SCTP_FREE(sctp_ifnp, SCTP_M_IFN); 259 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 260 } 261 } 262 263 264 void 265 sctp_update_ifn_mtu(uint32_t ifn_index, uint32_t mtu) 266 { 267 struct sctp_ifn *sctp_ifnp; 268 269 sctp_ifnp = sctp_find_ifn((void *)NULL, ifn_index); 270 if (sctp_ifnp != NULL) { 271 sctp_ifnp->ifn_mtu = mtu; 272 } 273 } 274 275 276 void 277 sctp_free_ifa(struct sctp_ifa *sctp_ifap) 278 { 279 if (SCTP_DECREMENT_AND_CHECK_REFCOUNT(&sctp_ifap->refcount)) { 280 /* We zero'd the count */ 281 if (sctp_ifap->ifn_p) { 282 sctp_free_ifn(sctp_ifap->ifn_p); 283 } 284 SCTP_FREE(sctp_ifap, SCTP_M_IFA); 285 atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 286 } 287 } 288 289 290 static void 291 sctp_delete_ifn(struct sctp_ifn *sctp_ifnp, int hold_addr_lock) 292 { 293 struct sctp_ifn *found; 294 295 found = sctp_find_ifn(sctp_ifnp->ifn_p, sctp_ifnp->ifn_index); 296 if (found == NULL) { 297 /* Not in the list.. sorry */ 298 return; 299 } 300 if (hold_addr_lock == 0) 301 SCTP_IPI_ADDR_WLOCK(); 302 LIST_REMOVE(sctp_ifnp, next_bucket); 303 LIST_REMOVE(sctp_ifnp, next_ifn); 304 SCTP_DEREGISTER_INTERFACE(sctp_ifnp->ifn_index, 305 sctp_ifnp->registered_af); 306 if (hold_addr_lock == 0) 307 SCTP_IPI_ADDR_WUNLOCK(); 308 /* Take away the reference, and possibly free it */ 309 sctp_free_ifn(sctp_ifnp); 310 } 311 312 313 void 314 sctp_mark_ifa_addr_down(uint32_t vrf_id, struct sockaddr *addr, 315 const char *if_name, uint32_t ifn_index) 316 { 317 struct sctp_vrf *vrf; 318 struct sctp_ifa *sctp_ifap; 319 320 SCTP_IPI_ADDR_RLOCK(); 321 vrf = sctp_find_vrf(vrf_id); 322 if (vrf == NULL) { 323 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 324 goto out; 325 326 } 327 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 328 if (sctp_ifap == NULL) { 329 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 330 goto out; 331 } 332 if (sctp_ifap->ifn_p == NULL) { 333 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 334 goto out; 335 } 336 if (if_name) { 337 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 338 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 339 sctp_ifap->ifn_p->ifn_name, if_name); 340 goto out; 341 } 342 } else { 343 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 344 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 345 sctp_ifap->ifn_p->ifn_index, ifn_index); 346 goto out; 347 } 348 } 349 350 sctp_ifap->localifa_flags &= (~SCTP_ADDR_VALID); 351 sctp_ifap->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE; 352 out: 353 SCTP_IPI_ADDR_RUNLOCK(); 354 } 355 356 357 void 358 sctp_mark_ifa_addr_up(uint32_t vrf_id, struct sockaddr *addr, 359 const char *if_name, uint32_t ifn_index) 360 { 361 struct sctp_vrf *vrf; 362 struct sctp_ifa *sctp_ifap; 363 364 SCTP_IPI_ADDR_RLOCK(); 365 vrf = sctp_find_vrf(vrf_id); 366 if (vrf == NULL) { 367 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 368 goto out; 369 370 } 371 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 372 if (sctp_ifap == NULL) { 373 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find sctp_ifap for address\n"); 374 goto out; 375 } 376 if (sctp_ifap->ifn_p == NULL) { 377 SCTPDBG(SCTP_DEBUG_PCB4, "IFA has no IFN - can't mark unuseable\n"); 378 goto out; 379 } 380 if (if_name) { 381 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) != 0) { 382 SCTPDBG(SCTP_DEBUG_PCB4, "IFN %s of IFA not the same as %s\n", 383 sctp_ifap->ifn_p->ifn_name, if_name); 384 goto out; 385 } 386 } else { 387 if (sctp_ifap->ifn_p->ifn_index != ifn_index) { 388 SCTPDBG(SCTP_DEBUG_PCB4, "IFA owned by ifn_index:%d down command for ifn_index:%d - ignored\n", 389 sctp_ifap->ifn_p->ifn_index, ifn_index); 390 goto out; 391 } 392 } 393 394 sctp_ifap->localifa_flags &= (~SCTP_ADDR_IFA_UNUSEABLE); 395 sctp_ifap->localifa_flags |= SCTP_ADDR_VALID; 396 out: 397 SCTP_IPI_ADDR_RUNLOCK(); 398 } 399 400 401 /*- 402 * Add an ifa to an ifn. 403 * Register the interface as necessary. 404 * NOTE: ADDR write lock MUST be held. 405 */ 406 static void 407 sctp_add_ifa_to_ifn(struct sctp_ifn *sctp_ifnp, struct sctp_ifa *sctp_ifap) 408 { 409 int ifa_af; 410 411 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 412 sctp_ifap->ifn_p = sctp_ifnp; 413 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 414 /* update address counts */ 415 sctp_ifnp->ifa_count++; 416 ifa_af = sctp_ifap->address.sa.sa_family; 417 switch (ifa_af) { 418 #ifdef INET 419 case AF_INET: 420 sctp_ifnp->num_v4++; 421 break; 422 #endif 423 #ifdef INET6 424 case AF_INET6: 425 sctp_ifnp->num_v6++; 426 break; 427 #endif 428 default: 429 break; 430 } 431 if (sctp_ifnp->ifa_count == 1) { 432 /* register the new interface */ 433 SCTP_REGISTER_INTERFACE(sctp_ifnp->ifn_index, ifa_af); 434 sctp_ifnp->registered_af = ifa_af; 435 } 436 } 437 438 439 /*- 440 * Remove an ifa from its ifn. 441 * If no more addresses exist, remove the ifn too. Otherwise, re-register 442 * the interface based on the remaining address families left. 443 * NOTE: ADDR write lock MUST be held. 444 */ 445 static void 446 sctp_remove_ifa_from_ifn(struct sctp_ifa *sctp_ifap) 447 { 448 LIST_REMOVE(sctp_ifap, next_ifa); 449 if (sctp_ifap->ifn_p) { 450 /* update address counts */ 451 sctp_ifap->ifn_p->ifa_count--; 452 switch (sctp_ifap->address.sa.sa_family) { 453 #ifdef INET 454 case AF_INET: 455 sctp_ifap->ifn_p->num_v4--; 456 break; 457 #endif 458 #ifdef INET6 459 case AF_INET6: 460 sctp_ifap->ifn_p->num_v6--; 461 break; 462 #endif 463 default: 464 break; 465 } 466 467 if (LIST_EMPTY(&sctp_ifap->ifn_p->ifalist)) { 468 /* remove the ifn, possibly freeing it */ 469 sctp_delete_ifn(sctp_ifap->ifn_p, SCTP_ADDR_LOCKED); 470 } else { 471 /* re-register address family type, if needed */ 472 if ((sctp_ifap->ifn_p->num_v6 == 0) && 473 (sctp_ifap->ifn_p->registered_af == AF_INET6)) { 474 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 475 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 476 sctp_ifap->ifn_p->registered_af = AF_INET; 477 } else if ((sctp_ifap->ifn_p->num_v4 == 0) && 478 (sctp_ifap->ifn_p->registered_af == AF_INET)) { 479 SCTP_DEREGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET); 480 SCTP_REGISTER_INTERFACE(sctp_ifap->ifn_p->ifn_index, AF_INET6); 481 sctp_ifap->ifn_p->registered_af = AF_INET6; 482 } 483 /* free the ifn refcount */ 484 sctp_free_ifn(sctp_ifap->ifn_p); 485 } 486 sctp_ifap->ifn_p = NULL; 487 } 488 } 489 490 491 struct sctp_ifa * 492 sctp_add_addr_to_vrf(uint32_t vrf_id, void *ifn, uint32_t ifn_index, 493 uint32_t ifn_type, const char *if_name, void *ifa, 494 struct sockaddr *addr, uint32_t ifa_flags, 495 int dynamic_add) 496 { 497 struct sctp_vrf *vrf; 498 struct sctp_ifn *sctp_ifnp = NULL; 499 struct sctp_ifa *sctp_ifap = NULL; 500 struct sctp_ifalist *hash_addr_head; 501 struct sctp_ifnlist *hash_ifn_head; 502 uint32_t hash_of_addr; 503 int new_ifn_af = 0; 504 505 #ifdef SCTP_DEBUG 506 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: adding address: ", vrf_id); 507 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 508 #endif 509 SCTP_IPI_ADDR_WLOCK(); 510 sctp_ifnp = sctp_find_ifn(ifn, ifn_index); 511 if (sctp_ifnp) { 512 vrf = sctp_ifnp->vrf; 513 } else { 514 vrf = sctp_find_vrf(vrf_id); 515 if (vrf == NULL) { 516 vrf = sctp_allocate_vrf(vrf_id); 517 if (vrf == NULL) { 518 SCTP_IPI_ADDR_WUNLOCK(); 519 return (NULL); 520 } 521 } 522 } 523 if (sctp_ifnp == NULL) { 524 /* 525 * build one and add it, can't hold lock until after malloc 526 * done though. 527 */ 528 SCTP_IPI_ADDR_WUNLOCK(); 529 SCTP_MALLOC(sctp_ifnp, struct sctp_ifn *, 530 sizeof(struct sctp_ifn), SCTP_M_IFN); 531 if (sctp_ifnp == NULL) { 532 #ifdef INVARIANTS 533 panic("No memory for IFN"); 534 #endif 535 return (NULL); 536 } 537 memset(sctp_ifnp, 0, sizeof(struct sctp_ifn)); 538 sctp_ifnp->ifn_index = ifn_index; 539 sctp_ifnp->ifn_p = ifn; 540 sctp_ifnp->ifn_type = ifn_type; 541 sctp_ifnp->refcount = 0; 542 sctp_ifnp->vrf = vrf; 543 atomic_add_int(&vrf->refcount, 1); 544 sctp_ifnp->ifn_mtu = SCTP_GATHER_MTU_FROM_IFN_INFO(ifn, ifn_index, addr->sa_family); 545 if (if_name != NULL) { 546 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", if_name); 547 } else { 548 snprintf(sctp_ifnp->ifn_name, SCTP_IFNAMSIZ, "%s", "unknown"); 549 } 550 hash_ifn_head = &SCTP_BASE_INFO(vrf_ifn_hash)[(ifn_index & SCTP_BASE_INFO(vrf_ifn_hashmark))]; 551 LIST_INIT(&sctp_ifnp->ifalist); 552 SCTP_IPI_ADDR_WLOCK(); 553 LIST_INSERT_HEAD(hash_ifn_head, sctp_ifnp, next_bucket); 554 LIST_INSERT_HEAD(&vrf->ifnlist, sctp_ifnp, next_ifn); 555 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifns), 1); 556 new_ifn_af = 1; 557 } 558 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 559 if (sctp_ifap) { 560 /* Hmm, it already exists? */ 561 if ((sctp_ifap->ifn_p) && 562 (sctp_ifap->ifn_p->ifn_index == ifn_index)) { 563 SCTPDBG(SCTP_DEBUG_PCB4, "Using existing ifn %s (0x%x) for ifa %p\n", 564 sctp_ifap->ifn_p->ifn_name, ifn_index, 565 (void *)sctp_ifap); 566 if (new_ifn_af) { 567 /* Remove the created one that we don't want */ 568 sctp_delete_ifn(sctp_ifnp, SCTP_ADDR_LOCKED); 569 } 570 if (sctp_ifap->localifa_flags & SCTP_BEING_DELETED) { 571 /* easy to solve, just switch back to active */ 572 SCTPDBG(SCTP_DEBUG_PCB4, "Clearing deleted ifa flag\n"); 573 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 574 sctp_ifap->ifn_p = sctp_ifnp; 575 atomic_add_int(&sctp_ifap->ifn_p->refcount, 1); 576 } 577 exit_stage_left: 578 SCTP_IPI_ADDR_WUNLOCK(); 579 return (sctp_ifap); 580 } else { 581 if (sctp_ifap->ifn_p) { 582 /* 583 * The last IFN gets the address, remove the 584 * old one 585 */ 586 SCTPDBG(SCTP_DEBUG_PCB4, "Moving ifa %p from %s (0x%x) to %s (0x%x)\n", 587 (void *)sctp_ifap, sctp_ifap->ifn_p->ifn_name, 588 sctp_ifap->ifn_p->ifn_index, if_name, 589 ifn_index); 590 /* remove the address from the old ifn */ 591 sctp_remove_ifa_from_ifn(sctp_ifap); 592 /* move the address over to the new ifn */ 593 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 594 goto exit_stage_left; 595 } else { 596 /* repair ifnp which was NULL ? */ 597 sctp_ifap->localifa_flags = SCTP_ADDR_VALID; 598 SCTPDBG(SCTP_DEBUG_PCB4, "Repairing ifn %p for ifa %p\n", 599 (void *)sctp_ifnp, (void *)sctp_ifap); 600 sctp_add_ifa_to_ifn(sctp_ifnp, sctp_ifap); 601 } 602 goto exit_stage_left; 603 } 604 } 605 SCTP_IPI_ADDR_WUNLOCK(); 606 SCTP_MALLOC(sctp_ifap, struct sctp_ifa *, sizeof(struct sctp_ifa), SCTP_M_IFA); 607 if (sctp_ifap == NULL) { 608 #ifdef INVARIANTS 609 panic("No memory for IFA"); 610 #endif 611 return (NULL); 612 } 613 memset(sctp_ifap, 0, sizeof(struct sctp_ifa)); 614 sctp_ifap->ifn_p = sctp_ifnp; 615 atomic_add_int(&sctp_ifnp->refcount, 1); 616 sctp_ifap->vrf_id = vrf_id; 617 sctp_ifap->ifa = ifa; 618 memcpy(&sctp_ifap->address, addr, addr->sa_len); 619 sctp_ifap->localifa_flags = SCTP_ADDR_VALID | SCTP_ADDR_DEFER_USE; 620 sctp_ifap->flags = ifa_flags; 621 /* Set scope */ 622 switch (sctp_ifap->address.sa.sa_family) { 623 #ifdef INET 624 case AF_INET: 625 { 626 struct sockaddr_in *sin; 627 628 sin = (struct sockaddr_in *)&sctp_ifap->address.sin; 629 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 630 (IN4_ISLOOPBACK_ADDRESS(&sin->sin_addr))) { 631 sctp_ifap->src_is_loop = 1; 632 } 633 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) { 634 sctp_ifap->src_is_priv = 1; 635 } 636 sctp_ifnp->num_v4++; 637 if (new_ifn_af) 638 new_ifn_af = AF_INET; 639 break; 640 } 641 #endif 642 #ifdef INET6 643 case AF_INET6: 644 { 645 /* ok to use deprecated addresses? */ 646 struct sockaddr_in6 *sin6; 647 648 sin6 = (struct sockaddr_in6 *)&sctp_ifap->address.sin6; 649 if (SCTP_IFN_IS_IFT_LOOP(sctp_ifap->ifn_p) || 650 (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))) { 651 sctp_ifap->src_is_loop = 1; 652 } 653 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 654 sctp_ifap->src_is_priv = 1; 655 } 656 sctp_ifnp->num_v6++; 657 if (new_ifn_af) 658 new_ifn_af = AF_INET6; 659 break; 660 } 661 #endif 662 default: 663 new_ifn_af = 0; 664 break; 665 } 666 hash_of_addr = sctp_get_ifa_hash_val(&sctp_ifap->address.sa); 667 668 if ((sctp_ifap->src_is_priv == 0) && 669 (sctp_ifap->src_is_loop == 0)) { 670 sctp_ifap->src_is_glob = 1; 671 } 672 SCTP_IPI_ADDR_WLOCK(); 673 hash_addr_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)]; 674 LIST_INSERT_HEAD(hash_addr_head, sctp_ifap, next_bucket); 675 sctp_ifap->refcount = 1; 676 LIST_INSERT_HEAD(&sctp_ifnp->ifalist, sctp_ifap, next_ifa); 677 sctp_ifnp->ifa_count++; 678 vrf->total_ifa_count++; 679 atomic_add_int(&SCTP_BASE_INFO(ipi_count_ifas), 1); 680 if (new_ifn_af) { 681 SCTP_REGISTER_INTERFACE(ifn_index, new_ifn_af); 682 sctp_ifnp->registered_af = new_ifn_af; 683 } 684 SCTP_IPI_ADDR_WUNLOCK(); 685 if (dynamic_add) { 686 /* 687 * Bump up the refcount so that when the timer completes it 688 * will drop back down. 689 */ 690 struct sctp_laddr *wi; 691 692 atomic_add_int(&sctp_ifap->refcount, 1); 693 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 694 if (wi == NULL) { 695 /* 696 * Gak, what can we do? We have lost an address 697 * change can you say HOSED? 698 */ 699 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 700 /* Opps, must decrement the count */ 701 sctp_del_addr_from_vrf(vrf_id, addr, ifn_index, 702 if_name); 703 return (NULL); 704 } 705 SCTP_INCR_LADDR_COUNT(); 706 bzero(wi, sizeof(*wi)); 707 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 708 wi->ifa = sctp_ifap; 709 wi->action = SCTP_ADD_IP_ADDRESS; 710 711 SCTP_WQ_ADDR_LOCK(); 712 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 713 SCTP_WQ_ADDR_UNLOCK(); 714 715 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 716 (struct sctp_inpcb *)NULL, 717 (struct sctp_tcb *)NULL, 718 (struct sctp_nets *)NULL); 719 } else { 720 /* it's ready for use */ 721 sctp_ifap->localifa_flags &= ~SCTP_ADDR_DEFER_USE; 722 } 723 return (sctp_ifap); 724 } 725 726 void 727 sctp_del_addr_from_vrf(uint32_t vrf_id, struct sockaddr *addr, 728 uint32_t ifn_index, const char *if_name) 729 { 730 struct sctp_vrf *vrf; 731 struct sctp_ifa *sctp_ifap = NULL; 732 733 SCTP_IPI_ADDR_WLOCK(); 734 vrf = sctp_find_vrf(vrf_id); 735 if (vrf == NULL) { 736 SCTPDBG(SCTP_DEBUG_PCB4, "Can't find vrf_id 0x%x\n", vrf_id); 737 goto out_now; 738 } 739 #ifdef SCTP_DEBUG 740 SCTPDBG(SCTP_DEBUG_PCB4, "vrf_id 0x%x: deleting address:", vrf_id); 741 SCTPDBG_ADDR(SCTP_DEBUG_PCB4, addr); 742 #endif 743 sctp_ifap = sctp_find_ifa_by_addr(addr, vrf->vrf_id, SCTP_ADDR_LOCKED); 744 if (sctp_ifap) { 745 /* Validate the delete */ 746 if (sctp_ifap->ifn_p) { 747 int valid = 0; 748 749 /*- 750 * The name has priority over the ifn_index 751 * if its given. We do this especially for 752 * panda who might recycle indexes fast. 753 */ 754 if (if_name) { 755 if (strncmp(if_name, sctp_ifap->ifn_p->ifn_name, SCTP_IFNAMSIZ) == 0) { 756 /* They match its a correct delete */ 757 valid = 1; 758 } 759 } 760 if (!valid) { 761 /* last ditch check ifn_index */ 762 if (ifn_index == sctp_ifap->ifn_p->ifn_index) { 763 valid = 1; 764 } 765 } 766 if (!valid) { 767 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s does not match addresses\n", 768 ifn_index, ((if_name == NULL) ? "NULL" : if_name)); 769 SCTPDBG(SCTP_DEBUG_PCB4, "ifn:%d ifname:%s - ignoring delete\n", 770 sctp_ifap->ifn_p->ifn_index, sctp_ifap->ifn_p->ifn_name); 771 SCTP_IPI_ADDR_WUNLOCK(); 772 return; 773 } 774 } 775 SCTPDBG(SCTP_DEBUG_PCB4, "Deleting ifa %p\n", (void *)sctp_ifap); 776 sctp_ifap->localifa_flags &= SCTP_ADDR_VALID; 777 /* 778 * We don't set the flag. This means that the structure will 779 * hang around in EP's that have bound specific to it until 780 * they close. This gives us TCP like behavior if someone 781 * removes an address (or for that matter adds it right 782 * back). 783 */ 784 /* sctp_ifap->localifa_flags |= SCTP_BEING_DELETED; */ 785 vrf->total_ifa_count--; 786 LIST_REMOVE(sctp_ifap, next_bucket); 787 sctp_remove_ifa_from_ifn(sctp_ifap); 788 } 789 #ifdef SCTP_DEBUG 790 else { 791 SCTPDBG(SCTP_DEBUG_PCB4, "Del Addr-ifn:%d Could not find address:", 792 ifn_index); 793 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 794 } 795 #endif 796 797 out_now: 798 SCTP_IPI_ADDR_WUNLOCK(); 799 if (sctp_ifap) { 800 struct sctp_laddr *wi; 801 802 wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 803 if (wi == NULL) { 804 /* 805 * Gak, what can we do? We have lost an address 806 * change can you say HOSED? 807 */ 808 SCTPDBG(SCTP_DEBUG_PCB4, "Lost an address change?\n"); 809 810 /* Oops, must decrement the count */ 811 sctp_free_ifa(sctp_ifap); 812 return; 813 } 814 SCTP_INCR_LADDR_COUNT(); 815 bzero(wi, sizeof(*wi)); 816 (void)SCTP_GETTIME_TIMEVAL(&wi->start_time); 817 wi->ifa = sctp_ifap; 818 wi->action = SCTP_DEL_IP_ADDRESS; 819 SCTP_WQ_ADDR_LOCK(); 820 /* 821 * Should this really be a tailq? As it is we will process 822 * the newest first :-0 823 */ 824 LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr); 825 SCTP_WQ_ADDR_UNLOCK(); 826 827 sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ, 828 (struct sctp_inpcb *)NULL, 829 (struct sctp_tcb *)NULL, 830 (struct sctp_nets *)NULL); 831 } 832 return; 833 } 834 835 836 static int 837 sctp_does_stcb_own_this_addr(struct sctp_tcb *stcb, struct sockaddr *to) 838 { 839 int loopback_scope; 840 841 #if defined(INET) 842 int ipv4_local_scope, ipv4_addr_legal; 843 844 #endif 845 #if defined(INET6) 846 int local_scope, site_scope, ipv6_addr_legal; 847 848 #endif 849 struct sctp_vrf *vrf; 850 struct sctp_ifn *sctp_ifn; 851 struct sctp_ifa *sctp_ifa; 852 853 loopback_scope = stcb->asoc.scope.loopback_scope; 854 #if defined(INET) 855 ipv4_local_scope = stcb->asoc.scope.ipv4_local_scope; 856 ipv4_addr_legal = stcb->asoc.scope.ipv4_addr_legal; 857 #endif 858 #if defined(INET6) 859 local_scope = stcb->asoc.scope.local_scope; 860 site_scope = stcb->asoc.scope.site_scope; 861 ipv6_addr_legal = stcb->asoc.scope.ipv6_addr_legal; 862 #endif 863 864 SCTP_IPI_ADDR_RLOCK(); 865 vrf = sctp_find_vrf(stcb->asoc.vrf_id); 866 if (vrf == NULL) { 867 /* no vrf, no addresses */ 868 SCTP_IPI_ADDR_RUNLOCK(); 869 return (0); 870 } 871 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 872 LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) { 873 if ((loopback_scope == 0) && 874 SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) { 875 continue; 876 } 877 LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) { 878 if (sctp_is_addr_restricted(stcb, sctp_ifa) && 879 (!sctp_is_addr_pending(stcb, sctp_ifa))) { 880 /* 881 * We allow pending addresses, where 882 * we have sent an asconf-add to be 883 * considered valid. 884 */ 885 continue; 886 } 887 if (sctp_ifa->address.sa.sa_family != to->sa_family) { 888 continue; 889 } 890 switch (sctp_ifa->address.sa.sa_family) { 891 #ifdef INET 892 case AF_INET: 893 if (ipv4_addr_legal) { 894 struct sockaddr_in *sin, 895 *rsin; 896 897 sin = &sctp_ifa->address.sin; 898 rsin = (struct sockaddr_in *)to; 899 if ((ipv4_local_scope == 0) && 900 IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 901 continue; 902 } 903 if (prison_check_ip4(stcb->sctp_ep->ip_inp.inp.inp_cred, 904 &sin->sin_addr) != 0) { 905 continue; 906 } 907 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 908 SCTP_IPI_ADDR_RUNLOCK(); 909 return (1); 910 } 911 } 912 break; 913 #endif 914 #ifdef INET6 915 case AF_INET6: 916 if (ipv6_addr_legal) { 917 struct sockaddr_in6 *sin6, 918 *rsin6; 919 920 sin6 = &sctp_ifa->address.sin6; 921 rsin6 = (struct sockaddr_in6 *)to; 922 if (prison_check_ip6(stcb->sctp_ep->ip_inp.inp.inp_cred, 923 &sin6->sin6_addr) != 0) { 924 continue; 925 } 926 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 927 if (local_scope == 0) 928 continue; 929 if (sin6->sin6_scope_id == 0) { 930 if (sa6_recoverscope(sin6) != 0) 931 continue; 932 } 933 } 934 if ((site_scope == 0) && 935 (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) { 936 continue; 937 } 938 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 939 SCTP_IPI_ADDR_RUNLOCK(); 940 return (1); 941 } 942 } 943 break; 944 #endif 945 default: 946 /* TSNH */ 947 break; 948 } 949 } 950 } 951 } else { 952 struct sctp_laddr *laddr; 953 954 LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list, sctp_nxt_addr) { 955 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 956 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 957 continue; 958 } 959 if (sctp_is_addr_restricted(stcb, laddr->ifa) && 960 (!sctp_is_addr_pending(stcb, laddr->ifa))) { 961 /* 962 * We allow pending addresses, where we have 963 * sent an asconf-add to be considered 964 * valid. 965 */ 966 continue; 967 } 968 if (laddr->ifa->address.sa.sa_family != to->sa_family) { 969 continue; 970 } 971 switch (to->sa_family) { 972 #ifdef INET 973 case AF_INET: 974 { 975 struct sockaddr_in *sin, *rsin; 976 977 sin = (struct sockaddr_in *)&laddr->ifa->address.sin; 978 rsin = (struct sockaddr_in *)to; 979 if (sin->sin_addr.s_addr == rsin->sin_addr.s_addr) { 980 SCTP_IPI_ADDR_RUNLOCK(); 981 return (1); 982 } 983 break; 984 } 985 #endif 986 #ifdef INET6 987 case AF_INET6: 988 { 989 struct sockaddr_in6 *sin6, *rsin6; 990 991 sin6 = (struct sockaddr_in6 *)&laddr->ifa->address.sin6; 992 rsin6 = (struct sockaddr_in6 *)to; 993 if (SCTP6_ARE_ADDR_EQUAL(sin6, rsin6)) { 994 SCTP_IPI_ADDR_RUNLOCK(); 995 return (1); 996 } 997 break; 998 } 999 1000 #endif 1001 default: 1002 /* TSNH */ 1003 break; 1004 } 1005 1006 } 1007 } 1008 SCTP_IPI_ADDR_RUNLOCK(); 1009 return (0); 1010 } 1011 1012 1013 static struct sctp_tcb * 1014 sctp_tcb_special_locate(struct sctp_inpcb **inp_p, struct sockaddr *from, 1015 struct sockaddr *to, struct sctp_nets **netp, uint32_t vrf_id) 1016 { 1017 /**** ASSUMES THE CALLER holds the INP_INFO_RLOCK */ 1018 /* 1019 * If we support the TCP model, then we must now dig through to see 1020 * if we can find our endpoint in the list of tcp ep's. 1021 */ 1022 uint16_t lport, rport; 1023 struct sctppcbhead *ephead; 1024 struct sctp_inpcb *inp; 1025 struct sctp_laddr *laddr; 1026 struct sctp_tcb *stcb; 1027 struct sctp_nets *net; 1028 1029 if ((to == NULL) || (from == NULL)) { 1030 return (NULL); 1031 } 1032 switch (to->sa_family) { 1033 #ifdef INET 1034 case AF_INET: 1035 if (from->sa_family == AF_INET) { 1036 lport = ((struct sockaddr_in *)to)->sin_port; 1037 rport = ((struct sockaddr_in *)from)->sin_port; 1038 } else { 1039 return (NULL); 1040 } 1041 break; 1042 #endif 1043 #ifdef INET6 1044 case AF_INET6: 1045 if (from->sa_family == AF_INET6) { 1046 lport = ((struct sockaddr_in6 *)to)->sin6_port; 1047 rport = ((struct sockaddr_in6 *)from)->sin6_port; 1048 } else { 1049 return (NULL); 1050 } 1051 break; 1052 #endif 1053 default: 1054 return (NULL); 1055 } 1056 ephead = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 1057 /* 1058 * Ok now for each of the guys in this bucket we must look and see: 1059 * - Does the remote port match. - Does there single association's 1060 * addresses match this address (to). If so we update p_ep to point 1061 * to this ep and return the tcb from it. 1062 */ 1063 LIST_FOREACH(inp, ephead, sctp_hash) { 1064 SCTP_INP_RLOCK(inp); 1065 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1066 SCTP_INP_RUNLOCK(inp); 1067 continue; 1068 } 1069 if (lport != inp->sctp_lport) { 1070 SCTP_INP_RUNLOCK(inp); 1071 continue; 1072 } 1073 switch (to->sa_family) { 1074 #ifdef INET 1075 case AF_INET: 1076 { 1077 struct sockaddr_in *sin; 1078 1079 sin = (struct sockaddr_in *)to; 1080 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1081 &sin->sin_addr) != 0) { 1082 SCTP_INP_RUNLOCK(inp); 1083 continue; 1084 } 1085 break; 1086 } 1087 #endif 1088 #ifdef INET6 1089 case AF_INET6: 1090 { 1091 struct sockaddr_in6 *sin6; 1092 1093 sin6 = (struct sockaddr_in6 *)to; 1094 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1095 &sin6->sin6_addr) != 0) { 1096 SCTP_INP_RUNLOCK(inp); 1097 continue; 1098 } 1099 break; 1100 } 1101 #endif 1102 default: 1103 SCTP_INP_RUNLOCK(inp); 1104 continue; 1105 } 1106 if (inp->def_vrf_id != vrf_id) { 1107 SCTP_INP_RUNLOCK(inp); 1108 continue; 1109 } 1110 /* check to see if the ep has one of the addresses */ 1111 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 1112 /* We are NOT bound all, so look further */ 1113 int match = 0; 1114 1115 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1116 1117 if (laddr->ifa == NULL) { 1118 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", __FUNCTION__); 1119 continue; 1120 } 1121 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1122 SCTPDBG(SCTP_DEBUG_PCB1, "ifa being deleted\n"); 1123 continue; 1124 } 1125 if (laddr->ifa->address.sa.sa_family == 1126 to->sa_family) { 1127 /* see if it matches */ 1128 #ifdef INET 1129 if (from->sa_family == AF_INET) { 1130 struct sockaddr_in *intf_addr, 1131 *sin; 1132 1133 intf_addr = &laddr->ifa->address.sin; 1134 sin = (struct sockaddr_in *)to; 1135 if (sin->sin_addr.s_addr == 1136 intf_addr->sin_addr.s_addr) { 1137 match = 1; 1138 break; 1139 } 1140 } 1141 #endif 1142 #ifdef INET6 1143 if (from->sa_family == AF_INET6) { 1144 struct sockaddr_in6 *intf_addr6; 1145 struct sockaddr_in6 *sin6; 1146 1147 sin6 = (struct sockaddr_in6 *) 1148 to; 1149 intf_addr6 = &laddr->ifa->address.sin6; 1150 1151 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1152 intf_addr6)) { 1153 match = 1; 1154 break; 1155 } 1156 } 1157 #endif 1158 } 1159 } 1160 if (match == 0) { 1161 /* This endpoint does not have this address */ 1162 SCTP_INP_RUNLOCK(inp); 1163 continue; 1164 } 1165 } 1166 /* 1167 * Ok if we hit here the ep has the address, does it hold 1168 * the tcb? 1169 */ 1170 /* XXX: Why don't we TAILQ_FOREACH through sctp_asoc_list? */ 1171 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1172 if (stcb == NULL) { 1173 SCTP_INP_RUNLOCK(inp); 1174 continue; 1175 } 1176 SCTP_TCB_LOCK(stcb); 1177 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1178 SCTP_TCB_UNLOCK(stcb); 1179 SCTP_INP_RUNLOCK(inp); 1180 continue; 1181 } 1182 if (stcb->rport != rport) { 1183 /* remote port does not match. */ 1184 SCTP_TCB_UNLOCK(stcb); 1185 SCTP_INP_RUNLOCK(inp); 1186 continue; 1187 } 1188 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1189 SCTP_TCB_UNLOCK(stcb); 1190 SCTP_INP_RUNLOCK(inp); 1191 continue; 1192 } 1193 if (!sctp_does_stcb_own_this_addr(stcb, to)) { 1194 SCTP_TCB_UNLOCK(stcb); 1195 SCTP_INP_RUNLOCK(inp); 1196 continue; 1197 } 1198 /* Does this TCB have a matching address? */ 1199 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1200 1201 if (net->ro._l_addr.sa.sa_family != from->sa_family) { 1202 /* not the same family, can't be a match */ 1203 continue; 1204 } 1205 switch (from->sa_family) { 1206 #ifdef INET 1207 case AF_INET: 1208 { 1209 struct sockaddr_in *sin, *rsin; 1210 1211 sin = (struct sockaddr_in *)&net->ro._l_addr; 1212 rsin = (struct sockaddr_in *)from; 1213 if (sin->sin_addr.s_addr == 1214 rsin->sin_addr.s_addr) { 1215 /* found it */ 1216 if (netp != NULL) { 1217 *netp = net; 1218 } 1219 /* 1220 * Update the endpoint 1221 * pointer 1222 */ 1223 *inp_p = inp; 1224 SCTP_INP_RUNLOCK(inp); 1225 return (stcb); 1226 } 1227 break; 1228 } 1229 #endif 1230 #ifdef INET6 1231 case AF_INET6: 1232 { 1233 struct sockaddr_in6 *sin6, *rsin6; 1234 1235 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1236 rsin6 = (struct sockaddr_in6 *)from; 1237 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1238 rsin6)) { 1239 /* found it */ 1240 if (netp != NULL) { 1241 *netp = net; 1242 } 1243 /* 1244 * Update the endpoint 1245 * pointer 1246 */ 1247 *inp_p = inp; 1248 SCTP_INP_RUNLOCK(inp); 1249 return (stcb); 1250 } 1251 break; 1252 } 1253 #endif 1254 default: 1255 /* TSNH */ 1256 break; 1257 } 1258 } 1259 SCTP_TCB_UNLOCK(stcb); 1260 SCTP_INP_RUNLOCK(inp); 1261 } 1262 return (NULL); 1263 } 1264 1265 1266 /* 1267 * rules for use 1268 * 1269 * 1) If I return a NULL you must decrement any INP ref cnt. 2) If I find an 1270 * stcb, both will be locked (locked_tcb and stcb) but decrement will be done 1271 * (if locked == NULL). 3) Decrement happens on return ONLY if locked == 1272 * NULL. 1273 */ 1274 1275 struct sctp_tcb * 1276 sctp_findassociation_ep_addr(struct sctp_inpcb **inp_p, struct sockaddr *remote, 1277 struct sctp_nets **netp, struct sockaddr *local, struct sctp_tcb *locked_tcb) 1278 { 1279 struct sctpasochead *head; 1280 struct sctp_inpcb *inp; 1281 struct sctp_tcb *stcb = NULL; 1282 struct sctp_nets *net; 1283 uint16_t rport; 1284 1285 inp = *inp_p; 1286 switch (remote->sa_family) { 1287 #ifdef INET 1288 case AF_INET: 1289 rport = (((struct sockaddr_in *)remote)->sin_port); 1290 break; 1291 #endif 1292 #ifdef INET6 1293 case AF_INET6: 1294 rport = (((struct sockaddr_in6 *)remote)->sin6_port); 1295 break; 1296 #endif 1297 default: 1298 return (NULL); 1299 } 1300 if (locked_tcb) { 1301 /* 1302 * UN-lock so we can do proper locking here this occurs when 1303 * called from load_addresses_from_init. 1304 */ 1305 atomic_add_int(&locked_tcb->asoc.refcnt, 1); 1306 SCTP_TCB_UNLOCK(locked_tcb); 1307 } 1308 SCTP_INP_INFO_RLOCK(); 1309 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 1310 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 1311 /*- 1312 * Now either this guy is our listener or it's the 1313 * connector. If it is the one that issued the connect, then 1314 * it's only chance is to be the first TCB in the list. If 1315 * it is the acceptor, then do the special_lookup to hash 1316 * and find the real inp. 1317 */ 1318 if ((inp->sctp_socket) && (inp->sctp_socket->so_qlimit)) { 1319 /* to is peer addr, from is my addr */ 1320 stcb = sctp_tcb_special_locate(inp_p, remote, local, 1321 netp, inp->def_vrf_id); 1322 if ((stcb != NULL) && (locked_tcb == NULL)) { 1323 /* we have a locked tcb, lower refcount */ 1324 SCTP_INP_DECR_REF(inp); 1325 } 1326 if ((locked_tcb != NULL) && (locked_tcb != stcb)) { 1327 SCTP_INP_RLOCK(locked_tcb->sctp_ep); 1328 SCTP_TCB_LOCK(locked_tcb); 1329 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1330 SCTP_INP_RUNLOCK(locked_tcb->sctp_ep); 1331 } 1332 SCTP_INP_INFO_RUNLOCK(); 1333 return (stcb); 1334 } else { 1335 SCTP_INP_WLOCK(inp); 1336 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1337 goto null_return; 1338 } 1339 stcb = LIST_FIRST(&inp->sctp_asoc_list); 1340 if (stcb == NULL) { 1341 goto null_return; 1342 } 1343 SCTP_TCB_LOCK(stcb); 1344 1345 if (stcb->rport != rport) { 1346 /* remote port does not match. */ 1347 SCTP_TCB_UNLOCK(stcb); 1348 goto null_return; 1349 } 1350 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1351 SCTP_TCB_UNLOCK(stcb); 1352 goto null_return; 1353 } 1354 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1355 SCTP_TCB_UNLOCK(stcb); 1356 goto null_return; 1357 } 1358 /* now look at the list of remote addresses */ 1359 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1360 #ifdef INVARIANTS 1361 if (net == (TAILQ_NEXT(net, sctp_next))) { 1362 panic("Corrupt net list"); 1363 } 1364 #endif 1365 if (net->ro._l_addr.sa.sa_family != 1366 remote->sa_family) { 1367 /* not the same family */ 1368 continue; 1369 } 1370 switch (remote->sa_family) { 1371 #ifdef INET 1372 case AF_INET: 1373 { 1374 struct sockaddr_in *sin, 1375 *rsin; 1376 1377 sin = (struct sockaddr_in *) 1378 &net->ro._l_addr; 1379 rsin = (struct sockaddr_in *)remote; 1380 if (sin->sin_addr.s_addr == 1381 rsin->sin_addr.s_addr) { 1382 /* found it */ 1383 if (netp != NULL) { 1384 *netp = net; 1385 } 1386 if (locked_tcb == NULL) { 1387 SCTP_INP_DECR_REF(inp); 1388 } else if (locked_tcb != stcb) { 1389 SCTP_TCB_LOCK(locked_tcb); 1390 } 1391 if (locked_tcb) { 1392 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1393 } 1394 SCTP_INP_WUNLOCK(inp); 1395 SCTP_INP_INFO_RUNLOCK(); 1396 return (stcb); 1397 } 1398 break; 1399 } 1400 #endif 1401 #ifdef INET6 1402 case AF_INET6: 1403 { 1404 struct sockaddr_in6 *sin6, 1405 *rsin6; 1406 1407 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 1408 rsin6 = (struct sockaddr_in6 *)remote; 1409 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1410 rsin6)) { 1411 /* found it */ 1412 if (netp != NULL) { 1413 *netp = net; 1414 } 1415 if (locked_tcb == NULL) { 1416 SCTP_INP_DECR_REF(inp); 1417 } else if (locked_tcb != stcb) { 1418 SCTP_TCB_LOCK(locked_tcb); 1419 } 1420 if (locked_tcb) { 1421 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1422 } 1423 SCTP_INP_WUNLOCK(inp); 1424 SCTP_INP_INFO_RUNLOCK(); 1425 return (stcb); 1426 } 1427 break; 1428 } 1429 #endif 1430 default: 1431 /* TSNH */ 1432 break; 1433 } 1434 } 1435 SCTP_TCB_UNLOCK(stcb); 1436 } 1437 } else { 1438 SCTP_INP_WLOCK(inp); 1439 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1440 goto null_return; 1441 } 1442 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(rport, 1443 inp->sctp_hashmark)]; 1444 if (head == NULL) { 1445 goto null_return; 1446 } 1447 LIST_FOREACH(stcb, head, sctp_tcbhash) { 1448 if (stcb->rport != rport) { 1449 /* remote port does not match */ 1450 continue; 1451 } 1452 SCTP_TCB_LOCK(stcb); 1453 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1454 SCTP_TCB_UNLOCK(stcb); 1455 continue; 1456 } 1457 if (local && !sctp_does_stcb_own_this_addr(stcb, local)) { 1458 SCTP_TCB_UNLOCK(stcb); 1459 continue; 1460 } 1461 /* now look at the list of remote addresses */ 1462 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 1463 #ifdef INVARIANTS 1464 if (net == (TAILQ_NEXT(net, sctp_next))) { 1465 panic("Corrupt net list"); 1466 } 1467 #endif 1468 if (net->ro._l_addr.sa.sa_family != 1469 remote->sa_family) { 1470 /* not the same family */ 1471 continue; 1472 } 1473 switch (remote->sa_family) { 1474 #ifdef INET 1475 case AF_INET: 1476 { 1477 struct sockaddr_in *sin, 1478 *rsin; 1479 1480 sin = (struct sockaddr_in *) 1481 &net->ro._l_addr; 1482 rsin = (struct sockaddr_in *)remote; 1483 if (sin->sin_addr.s_addr == 1484 rsin->sin_addr.s_addr) { 1485 /* found it */ 1486 if (netp != NULL) { 1487 *netp = net; 1488 } 1489 if (locked_tcb == NULL) { 1490 SCTP_INP_DECR_REF(inp); 1491 } else if (locked_tcb != stcb) { 1492 SCTP_TCB_LOCK(locked_tcb); 1493 } 1494 if (locked_tcb) { 1495 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1496 } 1497 SCTP_INP_WUNLOCK(inp); 1498 SCTP_INP_INFO_RUNLOCK(); 1499 return (stcb); 1500 } 1501 break; 1502 } 1503 #endif 1504 #ifdef INET6 1505 case AF_INET6: 1506 { 1507 struct sockaddr_in6 *sin6, 1508 *rsin6; 1509 1510 sin6 = (struct sockaddr_in6 *) 1511 &net->ro._l_addr; 1512 rsin6 = (struct sockaddr_in6 *)remote; 1513 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1514 rsin6)) { 1515 /* found it */ 1516 if (netp != NULL) { 1517 *netp = net; 1518 } 1519 if (locked_tcb == NULL) { 1520 SCTP_INP_DECR_REF(inp); 1521 } else if (locked_tcb != stcb) { 1522 SCTP_TCB_LOCK(locked_tcb); 1523 } 1524 if (locked_tcb) { 1525 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1526 } 1527 SCTP_INP_WUNLOCK(inp); 1528 SCTP_INP_INFO_RUNLOCK(); 1529 return (stcb); 1530 } 1531 break; 1532 } 1533 #endif 1534 default: 1535 /* TSNH */ 1536 break; 1537 } 1538 } 1539 SCTP_TCB_UNLOCK(stcb); 1540 } 1541 } 1542 null_return: 1543 /* clean up for returning null */ 1544 if (locked_tcb) { 1545 SCTP_TCB_LOCK(locked_tcb); 1546 atomic_subtract_int(&locked_tcb->asoc.refcnt, 1); 1547 } 1548 SCTP_INP_WUNLOCK(inp); 1549 SCTP_INP_INFO_RUNLOCK(); 1550 /* not found */ 1551 return (NULL); 1552 } 1553 1554 1555 /* 1556 * Find an association for a specific endpoint using the association id given 1557 * out in the COMM_UP notification 1558 */ 1559 struct sctp_tcb * 1560 sctp_findasoc_ep_asocid_locked(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1561 { 1562 /* 1563 * Use my the assoc_id to find a endpoint 1564 */ 1565 struct sctpasochead *head; 1566 struct sctp_tcb *stcb; 1567 uint32_t id; 1568 1569 if (inp == NULL) { 1570 SCTP_PRINTF("TSNH ep_associd\n"); 1571 return (NULL); 1572 } 1573 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1574 SCTP_PRINTF("TSNH ep_associd0\n"); 1575 return (NULL); 1576 } 1577 id = (uint32_t) asoc_id; 1578 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 1579 if (head == NULL) { 1580 /* invalid id TSNH */ 1581 SCTP_PRINTF("TSNH ep_associd1\n"); 1582 return (NULL); 1583 } 1584 LIST_FOREACH(stcb, head, sctp_tcbasocidhash) { 1585 if (stcb->asoc.assoc_id == id) { 1586 if (inp != stcb->sctp_ep) { 1587 /* 1588 * some other guy has the same id active (id 1589 * collision ??). 1590 */ 1591 SCTP_PRINTF("TSNH ep_associd2\n"); 1592 continue; 1593 } 1594 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 1595 continue; 1596 } 1597 if (want_lock) { 1598 SCTP_TCB_LOCK(stcb); 1599 } 1600 return (stcb); 1601 } 1602 } 1603 return (NULL); 1604 } 1605 1606 1607 struct sctp_tcb * 1608 sctp_findassociation_ep_asocid(struct sctp_inpcb *inp, sctp_assoc_t asoc_id, int want_lock) 1609 { 1610 struct sctp_tcb *stcb; 1611 1612 SCTP_INP_RLOCK(inp); 1613 stcb = sctp_findasoc_ep_asocid_locked(inp, asoc_id, want_lock); 1614 SCTP_INP_RUNLOCK(inp); 1615 return (stcb); 1616 } 1617 1618 1619 /* 1620 * Endpoint probe expects that the INP_INFO is locked. 1621 */ 1622 static struct sctp_inpcb * 1623 sctp_endpoint_probe(struct sockaddr *nam, struct sctppcbhead *head, 1624 uint16_t lport, uint32_t vrf_id) 1625 { 1626 struct sctp_inpcb *inp; 1627 struct sctp_laddr *laddr; 1628 1629 #ifdef INET 1630 struct sockaddr_in *sin; 1631 1632 #endif 1633 #ifdef INET6 1634 struct sockaddr_in6 *sin6; 1635 struct sockaddr_in6 *intf_addr6; 1636 1637 #endif 1638 int fnd; 1639 1640 #ifdef INET 1641 sin = NULL; 1642 #endif 1643 #ifdef INET6 1644 sin6 = NULL; 1645 #endif 1646 switch (nam->sa_family) { 1647 #ifdef INET 1648 case AF_INET: 1649 sin = (struct sockaddr_in *)nam; 1650 break; 1651 #endif 1652 #ifdef INET6 1653 case AF_INET6: 1654 sin6 = (struct sockaddr_in6 *)nam; 1655 break; 1656 #endif 1657 default: 1658 /* unsupported family */ 1659 return (NULL); 1660 } 1661 1662 if (head == NULL) 1663 return (NULL); 1664 1665 LIST_FOREACH(inp, head, sctp_hash) { 1666 SCTP_INP_RLOCK(inp); 1667 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1668 SCTP_INP_RUNLOCK(inp); 1669 continue; 1670 } 1671 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) && 1672 (inp->sctp_lport == lport)) { 1673 /* got it */ 1674 switch (nam->sa_family) { 1675 #ifdef INET 1676 case AF_INET: 1677 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1678 SCTP_IPV6_V6ONLY(inp)) { 1679 /* 1680 * IPv4 on a IPv6 socket with ONLY 1681 * IPv6 set 1682 */ 1683 SCTP_INP_RUNLOCK(inp); 1684 continue; 1685 } 1686 if (prison_check_ip4(inp->ip_inp.inp.inp_cred, 1687 &sin->sin_addr) != 0) { 1688 SCTP_INP_RUNLOCK(inp); 1689 continue; 1690 } 1691 break; 1692 #endif 1693 #ifdef INET6 1694 case AF_INET6: 1695 /* 1696 * A V6 address and the endpoint is NOT 1697 * bound V6 1698 */ 1699 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) { 1700 SCTP_INP_RUNLOCK(inp); 1701 continue; 1702 } 1703 if (prison_check_ip6(inp->ip_inp.inp.inp_cred, 1704 &sin6->sin6_addr) != 0) { 1705 SCTP_INP_RUNLOCK(inp); 1706 continue; 1707 } 1708 break; 1709 #endif 1710 default: 1711 break; 1712 } 1713 /* does a VRF id match? */ 1714 fnd = 0; 1715 if (inp->def_vrf_id == vrf_id) 1716 fnd = 1; 1717 1718 SCTP_INP_RUNLOCK(inp); 1719 if (!fnd) 1720 continue; 1721 return (inp); 1722 } 1723 SCTP_INP_RUNLOCK(inp); 1724 } 1725 switch (nam->sa_family) { 1726 #ifdef INET 1727 case AF_INET: 1728 if (sin->sin_addr.s_addr == INADDR_ANY) { 1729 /* Can't hunt for one that has no address specified */ 1730 return (NULL); 1731 } 1732 break; 1733 #endif 1734 #ifdef INET6 1735 case AF_INET6: 1736 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1737 /* Can't hunt for one that has no address specified */ 1738 return (NULL); 1739 } 1740 break; 1741 #endif 1742 default: 1743 break; 1744 } 1745 /* 1746 * ok, not bound to all so see if we can find a EP bound to this 1747 * address. 1748 */ 1749 LIST_FOREACH(inp, head, sctp_hash) { 1750 SCTP_INP_RLOCK(inp); 1751 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1752 SCTP_INP_RUNLOCK(inp); 1753 continue; 1754 } 1755 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL)) { 1756 SCTP_INP_RUNLOCK(inp); 1757 continue; 1758 } 1759 /* 1760 * Ok this could be a likely candidate, look at all of its 1761 * addresses 1762 */ 1763 if (inp->sctp_lport != lport) { 1764 SCTP_INP_RUNLOCK(inp); 1765 continue; 1766 } 1767 /* does a VRF id match? */ 1768 fnd = 0; 1769 if (inp->def_vrf_id == vrf_id) 1770 fnd = 1; 1771 1772 if (!fnd) { 1773 SCTP_INP_RUNLOCK(inp); 1774 continue; 1775 } 1776 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 1777 if (laddr->ifa == NULL) { 1778 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 1779 __FUNCTION__); 1780 continue; 1781 } 1782 SCTPDBG(SCTP_DEBUG_PCB1, "Ok laddr->ifa:%p is possible, ", 1783 (void *)laddr->ifa); 1784 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 1785 SCTPDBG(SCTP_DEBUG_PCB1, "Huh IFA being deleted\n"); 1786 continue; 1787 } 1788 if (laddr->ifa->address.sa.sa_family == nam->sa_family) { 1789 /* possible, see if it matches */ 1790 switch (nam->sa_family) { 1791 #ifdef INET 1792 case AF_INET: 1793 if (sin->sin_addr.s_addr == 1794 laddr->ifa->address.sin.sin_addr.s_addr) { 1795 SCTP_INP_RUNLOCK(inp); 1796 return (inp); 1797 } 1798 break; 1799 #endif 1800 #ifdef INET6 1801 case AF_INET6: 1802 intf_addr6 = &laddr->ifa->address.sin6; 1803 if (SCTP6_ARE_ADDR_EQUAL(sin6, 1804 intf_addr6)) { 1805 SCTP_INP_RUNLOCK(inp); 1806 return (inp); 1807 } 1808 break; 1809 #endif 1810 } 1811 } 1812 } 1813 SCTP_INP_RUNLOCK(inp); 1814 } 1815 return (NULL); 1816 } 1817 1818 1819 static struct sctp_inpcb * 1820 sctp_isport_inuse(struct sctp_inpcb *inp, uint16_t lport, uint32_t vrf_id) 1821 { 1822 struct sctppcbhead *head; 1823 struct sctp_inpcb *t_inp; 1824 int fnd; 1825 1826 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1827 SCTP_BASE_INFO(hashmark))]; 1828 LIST_FOREACH(t_inp, head, sctp_hash) { 1829 if (t_inp->sctp_lport != lport) { 1830 continue; 1831 } 1832 /* is it in the VRF in question */ 1833 fnd = 0; 1834 if (t_inp->def_vrf_id == vrf_id) 1835 fnd = 1; 1836 if (!fnd) 1837 continue; 1838 1839 /* This one is in use. */ 1840 /* check the v6/v4 binding issue */ 1841 if ((t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1842 SCTP_IPV6_V6ONLY(t_inp)) { 1843 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1844 /* collision in V6 space */ 1845 return (t_inp); 1846 } else { 1847 /* inp is BOUND_V4 no conflict */ 1848 continue; 1849 } 1850 } else if (t_inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) { 1851 /* t_inp is bound v4 and v6, conflict always */ 1852 return (t_inp); 1853 } else { 1854 /* t_inp is bound only V4 */ 1855 if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) && 1856 SCTP_IPV6_V6ONLY(inp)) { 1857 /* no conflict */ 1858 continue; 1859 } 1860 /* else fall through to conflict */ 1861 } 1862 return (t_inp); 1863 } 1864 return (NULL); 1865 } 1866 1867 1868 int 1869 sctp_swap_inpcb_for_listen(struct sctp_inpcb *inp) 1870 { 1871 /* For 1-2-1 with port reuse */ 1872 struct sctppcbhead *head; 1873 struct sctp_inpcb *tinp; 1874 1875 if (sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) { 1876 /* only works with port reuse on */ 1877 return (-1); 1878 } 1879 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) == 0) { 1880 return (0); 1881 } 1882 SCTP_INP_RUNLOCK(inp); 1883 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, 1884 SCTP_BASE_INFO(hashmark))]; 1885 /* Kick out all non-listeners to the TCP hash */ 1886 LIST_FOREACH(tinp, head, sctp_hash) { 1887 if (tinp->sctp_lport != inp->sctp_lport) { 1888 continue; 1889 } 1890 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 1891 continue; 1892 } 1893 if (tinp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 1894 continue; 1895 } 1896 if (tinp->sctp_socket->so_qlimit) { 1897 continue; 1898 } 1899 SCTP_INP_WLOCK(tinp); 1900 LIST_REMOVE(tinp, sctp_hash); 1901 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(tinp->sctp_lport, SCTP_BASE_INFO(hashtcpmark))]; 1902 tinp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 1903 LIST_INSERT_HEAD(head, tinp, sctp_hash); 1904 SCTP_INP_WUNLOCK(tinp); 1905 } 1906 SCTP_INP_WLOCK(inp); 1907 /* Pull from where he was */ 1908 LIST_REMOVE(inp, sctp_hash); 1909 inp->sctp_flags &= ~SCTP_PCB_FLAGS_IN_TCPPOOL; 1910 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(inp->sctp_lport, SCTP_BASE_INFO(hashmark))]; 1911 LIST_INSERT_HEAD(head, inp, sctp_hash); 1912 SCTP_INP_WUNLOCK(inp); 1913 SCTP_INP_RLOCK(inp); 1914 return (0); 1915 } 1916 1917 1918 struct sctp_inpcb * 1919 sctp_pcb_findep(struct sockaddr *nam, int find_tcp_pool, int have_lock, 1920 uint32_t vrf_id) 1921 { 1922 /* 1923 * First we check the hash table to see if someone has this port 1924 * bound with just the port. 1925 */ 1926 struct sctp_inpcb *inp; 1927 struct sctppcbhead *head; 1928 int lport; 1929 unsigned int i; 1930 1931 #ifdef INET 1932 struct sockaddr_in *sin; 1933 1934 #endif 1935 #ifdef INET6 1936 struct sockaddr_in6 *sin6; 1937 1938 #endif 1939 1940 switch (nam->sa_family) { 1941 #ifdef INET 1942 case AF_INET: 1943 sin = (struct sockaddr_in *)nam; 1944 lport = sin->sin_port; 1945 break; 1946 #endif 1947 #ifdef INET6 1948 case AF_INET6: 1949 sin6 = (struct sockaddr_in6 *)nam; 1950 lport = sin6->sin6_port; 1951 break; 1952 #endif 1953 default: 1954 return (NULL); 1955 } 1956 /* 1957 * I could cheat here and just cast to one of the types but we will 1958 * do it right. It also provides the check against an Unsupported 1959 * type too. 1960 */ 1961 /* Find the head of the ALLADDR chain */ 1962 if (have_lock == 0) { 1963 SCTP_INP_INFO_RLOCK(); 1964 } 1965 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, 1966 SCTP_BASE_INFO(hashmark))]; 1967 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1968 1969 /* 1970 * If the TCP model exists it could be that the main listening 1971 * endpoint is gone but there still exists a connected socket for 1972 * this guy. If so we can return the first one that we find. This 1973 * may NOT be the correct one so the caller should be wary on the 1974 * returned INP. Currently the only caller that sets find_tcp_pool 1975 * is in bindx where we are verifying that a user CAN bind the 1976 * address. He either has bound it already, or someone else has, or 1977 * its open to bind, so this is good enough. 1978 */ 1979 if (inp == NULL && find_tcp_pool) { 1980 for (i = 0; i < SCTP_BASE_INFO(hashtcpmark) + 1; i++) { 1981 head = &SCTP_BASE_INFO(sctp_tcpephash)[i]; 1982 inp = sctp_endpoint_probe(nam, head, lport, vrf_id); 1983 if (inp) { 1984 break; 1985 } 1986 } 1987 } 1988 if (inp) { 1989 SCTP_INP_INCR_REF(inp); 1990 } 1991 if (have_lock == 0) { 1992 SCTP_INP_INFO_RUNLOCK(); 1993 } 1994 return (inp); 1995 } 1996 1997 1998 /* 1999 * Find an association for an endpoint with the pointer to whom you want to 2000 * send to and the endpoint pointer. The address can be IPv4 or IPv6. We may 2001 * need to change the *to to some other struct like a mbuf... 2002 */ 2003 struct sctp_tcb * 2004 sctp_findassociation_addr_sa(struct sockaddr *from, struct sockaddr *to, 2005 struct sctp_inpcb **inp_p, struct sctp_nets **netp, int find_tcp_pool, 2006 uint32_t vrf_id) 2007 { 2008 struct sctp_inpcb *inp = NULL; 2009 struct sctp_tcb *stcb; 2010 2011 SCTP_INP_INFO_RLOCK(); 2012 if (find_tcp_pool) { 2013 if (inp_p != NULL) { 2014 stcb = sctp_tcb_special_locate(inp_p, from, to, netp, 2015 vrf_id); 2016 } else { 2017 stcb = sctp_tcb_special_locate(&inp, from, to, netp, 2018 vrf_id); 2019 } 2020 if (stcb != NULL) { 2021 SCTP_INP_INFO_RUNLOCK(); 2022 return (stcb); 2023 } 2024 } 2025 inp = sctp_pcb_findep(to, 0, 1, vrf_id); 2026 if (inp_p != NULL) { 2027 *inp_p = inp; 2028 } 2029 SCTP_INP_INFO_RUNLOCK(); 2030 if (inp == NULL) { 2031 return (NULL); 2032 } 2033 /* 2034 * ok, we have an endpoint, now lets find the assoc for it (if any) 2035 * we now place the source address or from in the to of the find 2036 * endpoint call. Since in reality this chain is used from the 2037 * inbound packet side. 2038 */ 2039 if (inp_p != NULL) { 2040 stcb = sctp_findassociation_ep_addr(inp_p, from, netp, to, 2041 NULL); 2042 } else { 2043 stcb = sctp_findassociation_ep_addr(&inp, from, netp, to, 2044 NULL); 2045 } 2046 return (stcb); 2047 } 2048 2049 2050 /* 2051 * This routine will grub through the mbuf that is a INIT or INIT-ACK and 2052 * find all addresses that the sender has specified in any address list. Each 2053 * address will be used to lookup the TCB and see if one exits. 2054 */ 2055 static struct sctp_tcb * 2056 sctp_findassociation_special_addr(struct mbuf *m, int offset, 2057 struct sctphdr *sh, struct sctp_inpcb **inp_p, struct sctp_nets **netp, 2058 struct sockaddr *dst) 2059 { 2060 struct sctp_paramhdr *phdr, parm_buf; 2061 2062 #if defined(INET) || defined(INET6) 2063 struct sctp_tcb *stcb; 2064 uint16_t ptype; 2065 2066 #endif 2067 uint16_t plen; 2068 2069 #ifdef INET 2070 struct sockaddr_in sin4; 2071 2072 #endif 2073 #ifdef INET6 2074 struct sockaddr_in6 sin6; 2075 2076 #endif 2077 2078 #ifdef INET 2079 memset(&sin4, 0, sizeof(sin4)); 2080 sin4.sin_len = sizeof(sin4); 2081 sin4.sin_family = AF_INET; 2082 sin4.sin_port = sh->src_port; 2083 #endif 2084 #ifdef INET6 2085 memset(&sin6, 0, sizeof(sin6)); 2086 sin6.sin6_len = sizeof(sin6); 2087 sin6.sin6_family = AF_INET6; 2088 sin6.sin6_port = sh->src_port; 2089 #endif 2090 2091 offset += sizeof(struct sctp_init_chunk); 2092 2093 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 2094 while (phdr != NULL) { 2095 /* now we must see if we want the parameter */ 2096 #if defined(INET) || defined(INET6) 2097 ptype = ntohs(phdr->param_type); 2098 #endif 2099 plen = ntohs(phdr->param_length); 2100 if (plen == 0) { 2101 break; 2102 } 2103 #ifdef INET 2104 if (ptype == SCTP_IPV4_ADDRESS && 2105 plen == sizeof(struct sctp_ipv4addr_param)) { 2106 /* Get the rest of the address */ 2107 struct sctp_ipv4addr_param ip4_parm, *p4; 2108 2109 phdr = sctp_get_next_param(m, offset, 2110 (struct sctp_paramhdr *)&ip4_parm, min(plen, sizeof(ip4_parm))); 2111 if (phdr == NULL) { 2112 return (NULL); 2113 } 2114 p4 = (struct sctp_ipv4addr_param *)phdr; 2115 memcpy(&sin4.sin_addr, &p4->addr, sizeof(p4->addr)); 2116 /* look it up */ 2117 stcb = sctp_findassociation_ep_addr(inp_p, 2118 (struct sockaddr *)&sin4, netp, dst, NULL); 2119 if (stcb != NULL) { 2120 return (stcb); 2121 } 2122 } 2123 #endif 2124 #ifdef INET6 2125 if (ptype == SCTP_IPV6_ADDRESS && 2126 plen == sizeof(struct sctp_ipv6addr_param)) { 2127 /* Get the rest of the address */ 2128 struct sctp_ipv6addr_param ip6_parm, *p6; 2129 2130 phdr = sctp_get_next_param(m, offset, 2131 (struct sctp_paramhdr *)&ip6_parm, min(plen, sizeof(ip6_parm))); 2132 if (phdr == NULL) { 2133 return (NULL); 2134 } 2135 p6 = (struct sctp_ipv6addr_param *)phdr; 2136 memcpy(&sin6.sin6_addr, &p6->addr, sizeof(p6->addr)); 2137 /* look it up */ 2138 stcb = sctp_findassociation_ep_addr(inp_p, 2139 (struct sockaddr *)&sin6, netp, dst, NULL); 2140 if (stcb != NULL) { 2141 return (stcb); 2142 } 2143 } 2144 #endif 2145 offset += SCTP_SIZE32(plen); 2146 phdr = sctp_get_next_param(m, offset, &parm_buf, 2147 sizeof(parm_buf)); 2148 } 2149 return (NULL); 2150 } 2151 2152 static struct sctp_tcb * 2153 sctp_findassoc_by_vtag(struct sockaddr *from, struct sockaddr *to, uint32_t vtag, 2154 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint16_t rport, 2155 uint16_t lport, int skip_src_check, uint32_t vrf_id, uint32_t remote_tag) 2156 { 2157 /* 2158 * Use my vtag to hash. If we find it we then verify the source addr 2159 * is in the assoc. If all goes well we save a bit on rec of a 2160 * packet. 2161 */ 2162 struct sctpasochead *head; 2163 struct sctp_nets *net; 2164 struct sctp_tcb *stcb; 2165 2166 SCTP_INP_INFO_RLOCK(); 2167 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(vtag, 2168 SCTP_BASE_INFO(hashasocmark))]; 2169 if (head == NULL) { 2170 /* invalid vtag */ 2171 SCTP_INP_INFO_RUNLOCK(); 2172 return (NULL); 2173 } 2174 LIST_FOREACH(stcb, head, sctp_asocs) { 2175 SCTP_INP_RLOCK(stcb->sctp_ep); 2176 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 2177 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2178 continue; 2179 } 2180 if (stcb->sctp_ep->def_vrf_id != vrf_id) { 2181 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2182 continue; 2183 } 2184 SCTP_TCB_LOCK(stcb); 2185 SCTP_INP_RUNLOCK(stcb->sctp_ep); 2186 if (stcb->asoc.my_vtag == vtag) { 2187 /* candidate */ 2188 if (stcb->rport != rport) { 2189 SCTP_TCB_UNLOCK(stcb); 2190 continue; 2191 } 2192 if (stcb->sctp_ep->sctp_lport != lport) { 2193 SCTP_TCB_UNLOCK(stcb); 2194 continue; 2195 } 2196 if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 2197 SCTP_TCB_UNLOCK(stcb); 2198 continue; 2199 } 2200 /* RRS:Need toaddr check here */ 2201 if (sctp_does_stcb_own_this_addr(stcb, to) == 0) { 2202 /* Endpoint does not own this address */ 2203 SCTP_TCB_UNLOCK(stcb); 2204 continue; 2205 } 2206 if (remote_tag) { 2207 /* 2208 * If we have both vtags that's all we match 2209 * on 2210 */ 2211 if (stcb->asoc.peer_vtag == remote_tag) { 2212 /* 2213 * If both tags match we consider it 2214 * conclusive and check NO 2215 * source/destination addresses 2216 */ 2217 goto conclusive; 2218 } 2219 } 2220 if (skip_src_check) { 2221 conclusive: 2222 if (from) { 2223 *netp = sctp_findnet(stcb, from); 2224 } else { 2225 *netp = NULL; /* unknown */ 2226 } 2227 if (inp_p) 2228 *inp_p = stcb->sctp_ep; 2229 SCTP_INP_INFO_RUNLOCK(); 2230 return (stcb); 2231 } 2232 net = sctp_findnet(stcb, from); 2233 if (net) { 2234 /* yep its him. */ 2235 *netp = net; 2236 SCTP_STAT_INCR(sctps_vtagexpress); 2237 *inp_p = stcb->sctp_ep; 2238 SCTP_INP_INFO_RUNLOCK(); 2239 return (stcb); 2240 } else { 2241 /* 2242 * not him, this should only happen in rare 2243 * cases so I peg it. 2244 */ 2245 SCTP_STAT_INCR(sctps_vtagbogus); 2246 } 2247 } 2248 SCTP_TCB_UNLOCK(stcb); 2249 } 2250 SCTP_INP_INFO_RUNLOCK(); 2251 return (NULL); 2252 } 2253 2254 2255 /* 2256 * Find an association with the pointer to the inbound IP packet. This can be 2257 * a IPv4 or IPv6 packet. 2258 */ 2259 struct sctp_tcb * 2260 sctp_findassociation_addr(struct mbuf *m, int offset, 2261 struct sockaddr *src, struct sockaddr *dst, 2262 struct sctphdr *sh, struct sctp_chunkhdr *ch, 2263 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2264 { 2265 int find_tcp_pool; 2266 struct sctp_tcb *stcb; 2267 struct sctp_inpcb *inp; 2268 2269 if (sh->v_tag) { 2270 /* we only go down this path if vtag is non-zero */ 2271 stcb = sctp_findassoc_by_vtag(src, dst, ntohl(sh->v_tag), 2272 inp_p, netp, sh->src_port, sh->dest_port, 0, vrf_id, 0); 2273 if (stcb) { 2274 return (stcb); 2275 } 2276 } 2277 find_tcp_pool = 0; 2278 if ((ch->chunk_type != SCTP_INITIATION) && 2279 (ch->chunk_type != SCTP_INITIATION_ACK) && 2280 (ch->chunk_type != SCTP_COOKIE_ACK) && 2281 (ch->chunk_type != SCTP_COOKIE_ECHO)) { 2282 /* Other chunk types go to the tcp pool. */ 2283 find_tcp_pool = 1; 2284 } 2285 if (inp_p) { 2286 stcb = sctp_findassociation_addr_sa(src, dst, inp_p, netp, 2287 find_tcp_pool, vrf_id); 2288 inp = *inp_p; 2289 } else { 2290 stcb = sctp_findassociation_addr_sa(src, dst, &inp, netp, 2291 find_tcp_pool, vrf_id); 2292 } 2293 SCTPDBG(SCTP_DEBUG_PCB1, "stcb:%p inp:%p\n", (void *)stcb, (void *)inp); 2294 if (stcb == NULL && inp) { 2295 /* Found a EP but not this address */ 2296 if ((ch->chunk_type == SCTP_INITIATION) || 2297 (ch->chunk_type == SCTP_INITIATION_ACK)) { 2298 /*- 2299 * special hook, we do NOT return linp or an 2300 * association that is linked to an existing 2301 * association that is under the TCP pool (i.e. no 2302 * listener exists). The endpoint finding routine 2303 * will always find a listener before examining the 2304 * TCP pool. 2305 */ 2306 if (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) { 2307 if (inp_p) { 2308 *inp_p = NULL; 2309 } 2310 return (NULL); 2311 } 2312 stcb = sctp_findassociation_special_addr(m, 2313 offset, sh, &inp, netp, dst); 2314 if (inp_p != NULL) { 2315 *inp_p = inp; 2316 } 2317 } 2318 } 2319 SCTPDBG(SCTP_DEBUG_PCB1, "stcb is %p\n", (void *)stcb); 2320 return (stcb); 2321 } 2322 2323 /* 2324 * lookup an association by an ASCONF lookup address. 2325 * if the lookup address is 0.0.0.0 or ::0, use the vtag to do the lookup 2326 */ 2327 struct sctp_tcb * 2328 sctp_findassociation_ep_asconf(struct mbuf *m, int offset, 2329 struct sockaddr *dst, struct sctphdr *sh, 2330 struct sctp_inpcb **inp_p, struct sctp_nets **netp, uint32_t vrf_id) 2331 { 2332 struct sctp_tcb *stcb; 2333 struct sockaddr_storage remote_store; 2334 struct sctp_paramhdr parm_buf, *phdr; 2335 int ptype; 2336 int zero_address = 0; 2337 2338 #ifdef INET 2339 struct sockaddr_in *sin; 2340 2341 #endif 2342 #ifdef INET6 2343 struct sockaddr_in6 *sin6; 2344 2345 #endif 2346 2347 memset(&remote_store, 0, sizeof(remote_store)); 2348 phdr = sctp_get_next_param(m, offset + sizeof(struct sctp_asconf_chunk), 2349 &parm_buf, sizeof(struct sctp_paramhdr)); 2350 if (phdr == NULL) { 2351 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf lookup addr\n", 2352 __FUNCTION__); 2353 return NULL; 2354 } 2355 ptype = (int)((uint32_t) ntohs(phdr->param_type)); 2356 /* get the correlation address */ 2357 switch (ptype) { 2358 #ifdef INET6 2359 case SCTP_IPV6_ADDRESS: 2360 { 2361 /* ipv6 address param */ 2362 struct sctp_ipv6addr_param *p6, p6_buf; 2363 2364 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv6addr_param)) { 2365 return NULL; 2366 } 2367 p6 = (struct sctp_ipv6addr_param *)sctp_get_next_param(m, 2368 offset + sizeof(struct sctp_asconf_chunk), 2369 &p6_buf.ph, sizeof(*p6)); 2370 if (p6 == NULL) { 2371 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v6 lookup addr\n", 2372 __FUNCTION__); 2373 return (NULL); 2374 } 2375 sin6 = (struct sockaddr_in6 *)&remote_store; 2376 sin6->sin6_family = AF_INET6; 2377 sin6->sin6_len = sizeof(*sin6); 2378 sin6->sin6_port = sh->src_port; 2379 memcpy(&sin6->sin6_addr, &p6->addr, sizeof(struct in6_addr)); 2380 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 2381 zero_address = 1; 2382 break; 2383 } 2384 #endif 2385 #ifdef INET 2386 case SCTP_IPV4_ADDRESS: 2387 { 2388 /* ipv4 address param */ 2389 struct sctp_ipv4addr_param *p4, p4_buf; 2390 2391 if (ntohs(phdr->param_length) != sizeof(struct sctp_ipv4addr_param)) { 2392 return NULL; 2393 } 2394 p4 = (struct sctp_ipv4addr_param *)sctp_get_next_param(m, 2395 offset + sizeof(struct sctp_asconf_chunk), 2396 &p4_buf.ph, sizeof(*p4)); 2397 if (p4 == NULL) { 2398 SCTPDBG(SCTP_DEBUG_INPUT3, "%s: failed to get asconf v4 lookup addr\n", 2399 __FUNCTION__); 2400 return (NULL); 2401 } 2402 sin = (struct sockaddr_in *)&remote_store; 2403 sin->sin_family = AF_INET; 2404 sin->sin_len = sizeof(*sin); 2405 sin->sin_port = sh->src_port; 2406 memcpy(&sin->sin_addr, &p4->addr, sizeof(struct in_addr)); 2407 if (sin->sin_addr.s_addr == INADDR_ANY) 2408 zero_address = 1; 2409 break; 2410 } 2411 #endif 2412 default: 2413 /* invalid address param type */ 2414 return NULL; 2415 } 2416 2417 if (zero_address) { 2418 stcb = sctp_findassoc_by_vtag(NULL, dst, ntohl(sh->v_tag), inp_p, 2419 netp, sh->src_port, sh->dest_port, 1, vrf_id, 0); 2420 if (stcb != NULL) { 2421 SCTP_INP_DECR_REF(*inp_p); 2422 } 2423 } else { 2424 stcb = sctp_findassociation_ep_addr(inp_p, 2425 (struct sockaddr *)&remote_store, netp, 2426 dst, NULL); 2427 } 2428 return (stcb); 2429 } 2430 2431 2432 /* 2433 * allocate a sctp_inpcb and setup a temporary binding to a port/all 2434 * addresses. This way if we don't get a bind we by default pick a ephemeral 2435 * port with all addresses bound. 2436 */ 2437 int 2438 sctp_inpcb_alloc(struct socket *so, uint32_t vrf_id) 2439 { 2440 /* 2441 * we get called when a new endpoint starts up. We need to allocate 2442 * the sctp_inpcb structure from the zone and init it. Mark it as 2443 * unbound and find a port that we can use as an ephemeral with 2444 * INADDR_ANY. If the user binds later no problem we can then add in 2445 * the specific addresses. And setup the default parameters for the 2446 * EP. 2447 */ 2448 int i, error; 2449 struct sctp_inpcb *inp; 2450 struct sctp_pcb *m; 2451 struct timeval time; 2452 sctp_sharedkey_t *null_key; 2453 2454 error = 0; 2455 2456 SCTP_INP_INFO_WLOCK(); 2457 inp = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_ep), struct sctp_inpcb); 2458 if (inp == NULL) { 2459 SCTP_PRINTF("Out of SCTP-INPCB structures - no resources\n"); 2460 SCTP_INP_INFO_WUNLOCK(); 2461 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2462 return (ENOBUFS); 2463 } 2464 /* zap it */ 2465 bzero(inp, sizeof(*inp)); 2466 2467 /* bump generations */ 2468 /* setup socket pointers */ 2469 inp->sctp_socket = so; 2470 inp->ip_inp.inp.inp_socket = so; 2471 inp->ip_inp.inp.inp_cred = crhold(so->so_cred); 2472 #ifdef INET6 2473 if (INP_SOCKAF(so) == AF_INET6) { 2474 if (MODULE_GLOBAL(ip6_auto_flowlabel)) { 2475 inp->ip_inp.inp.inp_flags |= IN6P_AUTOFLOWLABEL; 2476 } 2477 if (MODULE_GLOBAL(ip6_v6only)) { 2478 inp->ip_inp.inp.inp_flags |= IN6P_IPV6_V6ONLY; 2479 } 2480 } 2481 #endif 2482 inp->sctp_associd_counter = 1; 2483 inp->partial_delivery_point = SCTP_SB_LIMIT_RCV(so) >> SCTP_PARTIAL_DELIVERY_SHIFT; 2484 inp->sctp_frag_point = SCTP_DEFAULT_MAXSEGMENT; 2485 inp->sctp_cmt_on_off = SCTP_BASE_SYSCTL(sctp_cmt_on_off); 2486 inp->ecn_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_ecn_enable); 2487 inp->prsctp_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pr_enable); 2488 inp->reconfig_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_reconfig_enable); 2489 inp->nrsack_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_nrsack_enable); 2490 inp->pktdrop_supported = (uint8_t) SCTP_BASE_SYSCTL(sctp_pktdrop_enable); 2491 /* init the small hash table we use to track asocid <-> tcb */ 2492 inp->sctp_asocidhash = SCTP_HASH_INIT(SCTP_STACK_VTAG_HASH_SIZE, &inp->hashasocidmark); 2493 if (inp->sctp_asocidhash == NULL) { 2494 crfree(inp->ip_inp.inp.inp_cred); 2495 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2496 SCTP_INP_INFO_WUNLOCK(); 2497 return (ENOBUFS); 2498 } 2499 #ifdef IPSEC 2500 { 2501 struct inpcbpolicy *pcb_sp = NULL; 2502 2503 error = ipsec_init_policy(so, &pcb_sp); 2504 /* Arrange to share the policy */ 2505 inp->ip_inp.inp.inp_sp = pcb_sp; 2506 ((struct in6pcb *)(&inp->ip_inp.inp))->in6p_sp = pcb_sp; 2507 } 2508 if (error != 0) { 2509 crfree(inp->ip_inp.inp.inp_cred); 2510 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2511 SCTP_INP_INFO_WUNLOCK(); 2512 return error; 2513 } 2514 #endif /* IPSEC */ 2515 SCTP_INCR_EP_COUNT(); 2516 inp->ip_inp.inp.inp_ip_ttl = MODULE_GLOBAL(ip_defttl); 2517 SCTP_INP_INFO_WUNLOCK(); 2518 2519 so->so_pcb = (caddr_t)inp; 2520 2521 if (SCTP_SO_TYPE(so) == SOCK_SEQPACKET) { 2522 /* UDP style socket */ 2523 inp->sctp_flags = (SCTP_PCB_FLAGS_UDPTYPE | 2524 SCTP_PCB_FLAGS_UNBOUND); 2525 /* Be sure it is NON-BLOCKING IO for UDP */ 2526 /* SCTP_SET_SO_NBIO(so); */ 2527 } else if (SCTP_SO_TYPE(so) == SOCK_STREAM) { 2528 /* TCP style socket */ 2529 inp->sctp_flags = (SCTP_PCB_FLAGS_TCPTYPE | 2530 SCTP_PCB_FLAGS_UNBOUND); 2531 /* Be sure we have blocking IO by default */ 2532 SCTP_CLEAR_SO_NBIO(so); 2533 } else { 2534 /* 2535 * unsupported socket type (RAW, etc)- in case we missed it 2536 * in protosw 2537 */ 2538 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EOPNOTSUPP); 2539 so->so_pcb = NULL; 2540 crfree(inp->ip_inp.inp.inp_cred); 2541 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2542 return (EOPNOTSUPP); 2543 } 2544 if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_1) { 2545 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2546 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2547 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_2) { 2548 sctp_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2549 sctp_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2550 } else if (SCTP_BASE_SYSCTL(sctp_default_frag_interleave) == SCTP_FRAG_LEVEL_0) { 2551 sctp_feature_off(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE); 2552 sctp_feature_off(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS); 2553 } 2554 inp->sctp_tcbhash = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_pcbtblsize), 2555 &inp->sctp_hashmark); 2556 if (inp->sctp_tcbhash == NULL) { 2557 SCTP_PRINTF("Out of SCTP-INPCB->hashinit - no resources\n"); 2558 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 2559 so->so_pcb = NULL; 2560 crfree(inp->ip_inp.inp.inp_cred); 2561 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 2562 return (ENOBUFS); 2563 } 2564 inp->def_vrf_id = vrf_id; 2565 2566 SCTP_INP_INFO_WLOCK(); 2567 SCTP_INP_LOCK_INIT(inp); 2568 INP_LOCK_INIT(&inp->ip_inp.inp, "inp", "sctpinp"); 2569 SCTP_INP_READ_INIT(inp); 2570 SCTP_ASOC_CREATE_LOCK_INIT(inp); 2571 /* lock the new ep */ 2572 SCTP_INP_WLOCK(inp); 2573 2574 /* add it to the info area */ 2575 LIST_INSERT_HEAD(&SCTP_BASE_INFO(listhead), inp, sctp_list); 2576 SCTP_INP_INFO_WUNLOCK(); 2577 2578 TAILQ_INIT(&inp->read_queue); 2579 LIST_INIT(&inp->sctp_addr_list); 2580 2581 LIST_INIT(&inp->sctp_asoc_list); 2582 2583 #ifdef SCTP_TRACK_FREED_ASOCS 2584 /* TEMP CODE */ 2585 LIST_INIT(&inp->sctp_asoc_free_list); 2586 #endif 2587 /* Init the timer structure for signature change */ 2588 SCTP_OS_TIMER_INIT(&inp->sctp_ep.signature_change.timer); 2589 inp->sctp_ep.signature_change.type = SCTP_TIMER_TYPE_NEWCOOKIE; 2590 2591 /* now init the actual endpoint default data */ 2592 m = &inp->sctp_ep; 2593 2594 /* setup the base timeout information */ 2595 m->sctp_timeoutticks[SCTP_TIMER_SEND] = SEC_TO_TICKS(SCTP_SEND_SEC); /* needed ? */ 2596 m->sctp_timeoutticks[SCTP_TIMER_INIT] = SEC_TO_TICKS(SCTP_INIT_SEC); /* needed ? */ 2597 m->sctp_timeoutticks[SCTP_TIMER_RECV] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_delayed_sack_time_default)); 2598 m->sctp_timeoutticks[SCTP_TIMER_HEARTBEAT] = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_heartbeat_interval_default)); 2599 m->sctp_timeoutticks[SCTP_TIMER_PMTU] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_pmtu_raise_time_default)); 2600 m->sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_shutdown_guard_time_default)); 2601 m->sctp_timeoutticks[SCTP_TIMER_SIGNATURE] = SEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_secret_lifetime_default)); 2602 /* all max/min max are in ms */ 2603 m->sctp_maxrto = SCTP_BASE_SYSCTL(sctp_rto_max_default); 2604 m->sctp_minrto = SCTP_BASE_SYSCTL(sctp_rto_min_default); 2605 m->initial_rto = SCTP_BASE_SYSCTL(sctp_rto_initial_default); 2606 m->initial_init_rto_max = SCTP_BASE_SYSCTL(sctp_init_rto_max_default); 2607 m->sctp_sack_freq = SCTP_BASE_SYSCTL(sctp_sack_freq_default); 2608 m->max_init_times = SCTP_BASE_SYSCTL(sctp_init_rtx_max_default); 2609 m->max_send_times = SCTP_BASE_SYSCTL(sctp_assoc_rtx_max_default); 2610 m->def_net_failure = SCTP_BASE_SYSCTL(sctp_path_rtx_max_default); 2611 m->def_net_pf_threshold = SCTP_BASE_SYSCTL(sctp_path_pf_threshold); 2612 m->sctp_sws_sender = SCTP_SWS_SENDER_DEF; 2613 m->sctp_sws_receiver = SCTP_SWS_RECEIVER_DEF; 2614 m->max_burst = SCTP_BASE_SYSCTL(sctp_max_burst_default); 2615 m->fr_max_burst = SCTP_BASE_SYSCTL(sctp_fr_max_burst_default); 2616 2617 m->sctp_default_cc_module = SCTP_BASE_SYSCTL(sctp_default_cc_module); 2618 m->sctp_default_ss_module = SCTP_BASE_SYSCTL(sctp_default_ss_module); 2619 m->max_open_streams_intome = SCTP_BASE_SYSCTL(sctp_nr_incoming_streams_default); 2620 /* number of streams to pre-open on a association */ 2621 m->pre_open_stream_count = SCTP_BASE_SYSCTL(sctp_nr_outgoing_streams_default); 2622 2623 /* Add adaptation cookie */ 2624 m->adaptation_layer_indicator = 0; 2625 m->adaptation_layer_indicator_provided = 0; 2626 2627 /* seed random number generator */ 2628 m->random_counter = 1; 2629 m->store_at = SCTP_SIGNATURE_SIZE; 2630 SCTP_READ_RANDOM(m->random_numbers, sizeof(m->random_numbers)); 2631 sctp_fill_random_store(m); 2632 2633 /* Minimum cookie size */ 2634 m->size_of_a_cookie = (sizeof(struct sctp_init_msg) * 2) + 2635 sizeof(struct sctp_state_cookie); 2636 m->size_of_a_cookie += SCTP_SIGNATURE_SIZE; 2637 2638 /* Setup the initial secret */ 2639 (void)SCTP_GETTIME_TIMEVAL(&time); 2640 m->time_of_secret_change = time.tv_sec; 2641 2642 for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) { 2643 m->secret_key[0][i] = sctp_select_initial_TSN(m); 2644 } 2645 sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL); 2646 2647 /* How long is a cookie good for ? */ 2648 m->def_cookie_life = MSEC_TO_TICKS(SCTP_BASE_SYSCTL(sctp_valid_cookie_life_default)); 2649 /* 2650 * Initialize authentication parameters 2651 */ 2652 m->local_hmacs = sctp_default_supported_hmaclist(); 2653 m->local_auth_chunks = sctp_alloc_chunklist(); 2654 m->default_dscp = 0; 2655 #ifdef INET6 2656 m->default_flowlabel = 0; 2657 #endif 2658 m->port = 0; /* encapsulation disabled by default */ 2659 sctp_auth_set_default_chunks(m->local_auth_chunks); 2660 LIST_INIT(&m->shared_keys); 2661 /* add default NULL key as key id 0 */ 2662 null_key = sctp_alloc_sharedkey(); 2663 sctp_insert_sharedkey(&m->shared_keys, null_key); 2664 SCTP_INP_WUNLOCK(inp); 2665 #ifdef SCTP_LOG_CLOSING 2666 sctp_log_closing(inp, NULL, 12); 2667 #endif 2668 return (error); 2669 } 2670 2671 2672 void 2673 sctp_move_pcb_and_assoc(struct sctp_inpcb *old_inp, struct sctp_inpcb *new_inp, 2674 struct sctp_tcb *stcb) 2675 { 2676 struct sctp_nets *net; 2677 uint16_t lport, rport; 2678 struct sctppcbhead *head; 2679 struct sctp_laddr *laddr, *oladdr; 2680 2681 atomic_add_int(&stcb->asoc.refcnt, 1); 2682 SCTP_TCB_UNLOCK(stcb); 2683 SCTP_INP_INFO_WLOCK(); 2684 SCTP_INP_WLOCK(old_inp); 2685 SCTP_INP_WLOCK(new_inp); 2686 SCTP_TCB_LOCK(stcb); 2687 atomic_subtract_int(&stcb->asoc.refcnt, 1); 2688 2689 new_inp->sctp_ep.time_of_secret_change = 2690 old_inp->sctp_ep.time_of_secret_change; 2691 memcpy(new_inp->sctp_ep.secret_key, old_inp->sctp_ep.secret_key, 2692 sizeof(old_inp->sctp_ep.secret_key)); 2693 new_inp->sctp_ep.current_secret_number = 2694 old_inp->sctp_ep.current_secret_number; 2695 new_inp->sctp_ep.last_secret_number = 2696 old_inp->sctp_ep.last_secret_number; 2697 new_inp->sctp_ep.size_of_a_cookie = old_inp->sctp_ep.size_of_a_cookie; 2698 2699 /* make it so new data pours into the new socket */ 2700 stcb->sctp_socket = new_inp->sctp_socket; 2701 stcb->sctp_ep = new_inp; 2702 2703 /* Copy the port across */ 2704 lport = new_inp->sctp_lport = old_inp->sctp_lport; 2705 rport = stcb->rport; 2706 /* Pull the tcb from the old association */ 2707 LIST_REMOVE(stcb, sctp_tcbhash); 2708 LIST_REMOVE(stcb, sctp_tcblist); 2709 if (stcb->asoc.in_asocid_hash) { 2710 LIST_REMOVE(stcb, sctp_tcbasocidhash); 2711 } 2712 /* Now insert the new_inp into the TCP connected hash */ 2713 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR((lport | rport), SCTP_BASE_INFO(hashtcpmark))]; 2714 2715 LIST_INSERT_HEAD(head, new_inp, sctp_hash); 2716 /* Its safe to access */ 2717 new_inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 2718 2719 /* Now move the tcb into the endpoint list */ 2720 LIST_INSERT_HEAD(&new_inp->sctp_asoc_list, stcb, sctp_tcblist); 2721 /* 2722 * Question, do we even need to worry about the ep-hash since we 2723 * only have one connection? Probably not :> so lets get rid of it 2724 * and not suck up any kernel memory in that. 2725 */ 2726 if (stcb->asoc.in_asocid_hash) { 2727 struct sctpasochead *lhd; 2728 2729 lhd = &new_inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(stcb->asoc.assoc_id, 2730 new_inp->hashasocidmark)]; 2731 LIST_INSERT_HEAD(lhd, stcb, sctp_tcbasocidhash); 2732 } 2733 /* Ok. Let's restart timer. */ 2734 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2735 sctp_timer_start(SCTP_TIMER_TYPE_PATHMTURAISE, new_inp, 2736 stcb, net); 2737 } 2738 2739 SCTP_INP_INFO_WUNLOCK(); 2740 if (new_inp->sctp_tcbhash != NULL) { 2741 SCTP_HASH_FREE(new_inp->sctp_tcbhash, new_inp->sctp_hashmark); 2742 new_inp->sctp_tcbhash = NULL; 2743 } 2744 if ((new_inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) { 2745 /* Subset bound, so copy in the laddr list from the old_inp */ 2746 LIST_FOREACH(oladdr, &old_inp->sctp_addr_list, sctp_nxt_addr) { 2747 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 2748 if (laddr == NULL) { 2749 /* 2750 * Gak, what can we do? This assoc is really 2751 * HOSED. We probably should send an abort 2752 * here. 2753 */ 2754 SCTPDBG(SCTP_DEBUG_PCB1, "Association hosed in TCP model, out of laddr memory\n"); 2755 continue; 2756 } 2757 SCTP_INCR_LADDR_COUNT(); 2758 bzero(laddr, sizeof(*laddr)); 2759 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 2760 laddr->ifa = oladdr->ifa; 2761 atomic_add_int(&laddr->ifa->refcount, 1); 2762 LIST_INSERT_HEAD(&new_inp->sctp_addr_list, laddr, 2763 sctp_nxt_addr); 2764 new_inp->laddr_count++; 2765 if (oladdr == stcb->asoc.last_used_address) { 2766 stcb->asoc.last_used_address = laddr; 2767 } 2768 } 2769 } 2770 /* 2771 * Now any running timers need to be adjusted since we really don't 2772 * care if they are running or not just blast in the new_inp into 2773 * all of them. 2774 */ 2775 2776 stcb->asoc.dack_timer.ep = (void *)new_inp; 2777 stcb->asoc.asconf_timer.ep = (void *)new_inp; 2778 stcb->asoc.strreset_timer.ep = (void *)new_inp; 2779 stcb->asoc.shut_guard_timer.ep = (void *)new_inp; 2780 stcb->asoc.autoclose_timer.ep = (void *)new_inp; 2781 stcb->asoc.delayed_event_timer.ep = (void *)new_inp; 2782 stcb->asoc.delete_prim_timer.ep = (void *)new_inp; 2783 /* now what about the nets? */ 2784 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 2785 net->pmtu_timer.ep = (void *)new_inp; 2786 net->hb_timer.ep = (void *)new_inp; 2787 net->rxt_timer.ep = (void *)new_inp; 2788 } 2789 SCTP_INP_WUNLOCK(new_inp); 2790 SCTP_INP_WUNLOCK(old_inp); 2791 } 2792 2793 2794 2795 2796 /* sctp_ifap is used to bypass normal local address validation checks */ 2797 int 2798 sctp_inpcb_bind(struct socket *so, struct sockaddr *addr, 2799 struct sctp_ifa *sctp_ifap, struct thread *p) 2800 { 2801 /* bind a ep to a socket address */ 2802 struct sctppcbhead *head; 2803 struct sctp_inpcb *inp, *inp_tmp; 2804 struct inpcb *ip_inp; 2805 int port_reuse_active = 0; 2806 int bindall; 2807 uint16_t lport; 2808 int error; 2809 uint32_t vrf_id; 2810 2811 lport = 0; 2812 bindall = 1; 2813 inp = (struct sctp_inpcb *)so->so_pcb; 2814 ip_inp = (struct inpcb *)so->so_pcb; 2815 #ifdef SCTP_DEBUG 2816 if (addr) { 2817 SCTPDBG(SCTP_DEBUG_PCB1, "Bind called port: %d\n", 2818 ntohs(((struct sockaddr_in *)addr)->sin_port)); 2819 SCTPDBG(SCTP_DEBUG_PCB1, "Addr: "); 2820 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, addr); 2821 } 2822 #endif 2823 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) == 0) { 2824 /* already did a bind, subsequent binds NOT allowed ! */ 2825 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2826 return (EINVAL); 2827 } 2828 #ifdef INVARIANTS 2829 if (p == NULL) 2830 panic("null proc/thread"); 2831 #endif 2832 if (addr != NULL) { 2833 switch (addr->sa_family) { 2834 #ifdef INET 2835 case AF_INET: 2836 { 2837 struct sockaddr_in *sin; 2838 2839 /* IPV6_V6ONLY socket? */ 2840 if (SCTP_IPV6_V6ONLY(ip_inp)) { 2841 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2842 return (EINVAL); 2843 } 2844 if (addr->sa_len != sizeof(*sin)) { 2845 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2846 return (EINVAL); 2847 } 2848 sin = (struct sockaddr_in *)addr; 2849 lport = sin->sin_port; 2850 /* 2851 * For LOOPBACK the prison_local_ip4() call 2852 * will transmute the ip address to the 2853 * proper value. 2854 */ 2855 if (p && (error = prison_local_ip4(p->td_ucred, &sin->sin_addr)) != 0) { 2856 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2857 return (error); 2858 } 2859 if (sin->sin_addr.s_addr != INADDR_ANY) { 2860 bindall = 0; 2861 } 2862 break; 2863 } 2864 #endif 2865 #ifdef INET6 2866 case AF_INET6: 2867 { 2868 /* 2869 * Only for pure IPv6 Address. (No IPv4 2870 * Mapped!) 2871 */ 2872 struct sockaddr_in6 *sin6; 2873 2874 sin6 = (struct sockaddr_in6 *)addr; 2875 2876 if (addr->sa_len != sizeof(*sin6)) { 2877 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2878 return (EINVAL); 2879 } 2880 lport = sin6->sin6_port; 2881 /* 2882 * For LOOPBACK the prison_local_ip6() call 2883 * will transmute the ipv6 address to the 2884 * proper value. 2885 */ 2886 if (p && (error = prison_local_ip6(p->td_ucred, &sin6->sin6_addr, 2887 (SCTP_IPV6_V6ONLY(inp) != 0))) != 0) { 2888 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 2889 return (error); 2890 } 2891 if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 2892 bindall = 0; 2893 /* KAME hack: embed scopeid */ 2894 if (sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)) != 0) { 2895 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 2896 return (EINVAL); 2897 } 2898 } 2899 /* this must be cleared for ifa_ifwithaddr() */ 2900 sin6->sin6_scope_id = 0; 2901 break; 2902 } 2903 #endif 2904 default: 2905 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EAFNOSUPPORT); 2906 return (EAFNOSUPPORT); 2907 } 2908 } 2909 SCTP_INP_INFO_WLOCK(); 2910 SCTP_INP_WLOCK(inp); 2911 /* Setup a vrf_id to be the default for the non-bind-all case. */ 2912 vrf_id = inp->def_vrf_id; 2913 2914 /* increase our count due to the unlock we do */ 2915 SCTP_INP_INCR_REF(inp); 2916 if (lport) { 2917 /* 2918 * Did the caller specify a port? if so we must see if an ep 2919 * already has this one bound. 2920 */ 2921 /* got to be root to get at low ports */ 2922 if (ntohs(lport) < IPPORT_RESERVED) { 2923 if (p && (error = 2924 priv_check(p, PRIV_NETINET_RESERVEDPORT) 2925 )) { 2926 SCTP_INP_DECR_REF(inp); 2927 SCTP_INP_WUNLOCK(inp); 2928 SCTP_INP_INFO_WUNLOCK(); 2929 return (error); 2930 } 2931 } 2932 SCTP_INP_WUNLOCK(inp); 2933 if (bindall) { 2934 vrf_id = inp->def_vrf_id; 2935 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2936 if (inp_tmp != NULL) { 2937 /* 2938 * lock guy returned and lower count note 2939 * that we are not bound so inp_tmp should 2940 * NEVER be inp. And it is this inp 2941 * (inp_tmp) that gets the reference bump, 2942 * so we must lower it. 2943 */ 2944 SCTP_INP_DECR_REF(inp_tmp); 2945 /* unlock info */ 2946 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2947 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2948 /* 2949 * Ok, must be one-2-one and 2950 * allowing port re-use 2951 */ 2952 port_reuse_active = 1; 2953 goto continue_anyway; 2954 } 2955 SCTP_INP_DECR_REF(inp); 2956 SCTP_INP_INFO_WUNLOCK(); 2957 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2958 return (EADDRINUSE); 2959 } 2960 } else { 2961 inp_tmp = sctp_pcb_findep(addr, 0, 1, vrf_id); 2962 if (inp_tmp != NULL) { 2963 /* 2964 * lock guy returned and lower count note 2965 * that we are not bound so inp_tmp should 2966 * NEVER be inp. And it is this inp 2967 * (inp_tmp) that gets the reference bump, 2968 * so we must lower it. 2969 */ 2970 SCTP_INP_DECR_REF(inp_tmp); 2971 /* unlock info */ 2972 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2973 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2974 /* 2975 * Ok, must be one-2-one and 2976 * allowing port re-use 2977 */ 2978 port_reuse_active = 1; 2979 goto continue_anyway; 2980 } 2981 SCTP_INP_DECR_REF(inp); 2982 SCTP_INP_INFO_WUNLOCK(); 2983 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 2984 return (EADDRINUSE); 2985 } 2986 } 2987 continue_anyway: 2988 SCTP_INP_WLOCK(inp); 2989 if (bindall) { 2990 /* verify that no lport is not used by a singleton */ 2991 if ((port_reuse_active == 0) && 2992 (inp_tmp = sctp_isport_inuse(inp, lport, vrf_id))) { 2993 /* Sorry someone already has this one bound */ 2994 if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_PORTREUSE)) && 2995 (sctp_is_feature_on(inp_tmp, SCTP_PCB_FLAGS_PORTREUSE))) { 2996 port_reuse_active = 1; 2997 } else { 2998 SCTP_INP_DECR_REF(inp); 2999 SCTP_INP_WUNLOCK(inp); 3000 SCTP_INP_INFO_WUNLOCK(); 3001 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3002 return (EADDRINUSE); 3003 } 3004 } 3005 } 3006 } else { 3007 uint16_t first, last, candidate; 3008 uint16_t count; 3009 int done; 3010 3011 if (ip_inp->inp_flags & INP_HIGHPORT) { 3012 first = MODULE_GLOBAL(ipport_hifirstauto); 3013 last = MODULE_GLOBAL(ipport_hilastauto); 3014 } else if (ip_inp->inp_flags & INP_LOWPORT) { 3015 if (p && (error = 3016 priv_check(p, PRIV_NETINET_RESERVEDPORT) 3017 )) { 3018 SCTP_INP_DECR_REF(inp); 3019 SCTP_INP_WUNLOCK(inp); 3020 SCTP_INP_INFO_WUNLOCK(); 3021 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, error); 3022 return (error); 3023 } 3024 first = MODULE_GLOBAL(ipport_lowfirstauto); 3025 last = MODULE_GLOBAL(ipport_lowlastauto); 3026 } else { 3027 first = MODULE_GLOBAL(ipport_firstauto); 3028 last = MODULE_GLOBAL(ipport_lastauto); 3029 } 3030 if (first > last) { 3031 uint16_t temp; 3032 3033 temp = first; 3034 first = last; 3035 last = temp; 3036 } 3037 count = last - first + 1; /* number of candidates */ 3038 candidate = first + sctp_select_initial_TSN(&inp->sctp_ep) % (count); 3039 3040 done = 0; 3041 while (!done) { 3042 if (sctp_isport_inuse(inp, htons(candidate), inp->def_vrf_id) == NULL) { 3043 done = 1; 3044 } 3045 if (!done) { 3046 if (--count == 0) { 3047 SCTP_INP_DECR_REF(inp); 3048 SCTP_INP_WUNLOCK(inp); 3049 SCTP_INP_INFO_WUNLOCK(); 3050 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRINUSE); 3051 return (EADDRINUSE); 3052 } 3053 if (candidate == last) 3054 candidate = first; 3055 else 3056 candidate = candidate + 1; 3057 } 3058 } 3059 lport = htons(candidate); 3060 } 3061 SCTP_INP_DECR_REF(inp); 3062 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | 3063 SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 3064 /* 3065 * this really should not happen. The guy did a non-blocking 3066 * bind and then did a close at the same time. 3067 */ 3068 SCTP_INP_WUNLOCK(inp); 3069 SCTP_INP_INFO_WUNLOCK(); 3070 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3071 return (EINVAL); 3072 } 3073 /* ok we look clear to give out this port, so lets setup the binding */ 3074 if (bindall) { 3075 /* binding to all addresses, so just set in the proper flags */ 3076 inp->sctp_flags |= SCTP_PCB_FLAGS_BOUNDALL; 3077 /* set the automatic addr changes from kernel flag */ 3078 if (SCTP_BASE_SYSCTL(sctp_auto_asconf) == 0) { 3079 sctp_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3080 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3081 } else { 3082 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3083 sctp_feature_on(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3084 } 3085 if (SCTP_BASE_SYSCTL(sctp_multiple_asconfs) == 0) { 3086 sctp_feature_off(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3087 } else { 3088 sctp_feature_on(inp, SCTP_PCB_FLAGS_MULTIPLE_ASCONFS); 3089 } 3090 /* 3091 * set the automatic mobility_base from kernel flag (by 3092 * micchie) 3093 */ 3094 if (SCTP_BASE_SYSCTL(sctp_mobility_base) == 0) { 3095 sctp_mobility_feature_off(inp, SCTP_MOBILITY_BASE); 3096 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3097 } else { 3098 sctp_mobility_feature_on(inp, SCTP_MOBILITY_BASE); 3099 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3100 } 3101 /* 3102 * set the automatic mobility_fasthandoff from kernel flag 3103 * (by micchie) 3104 */ 3105 if (SCTP_BASE_SYSCTL(sctp_mobility_fasthandoff) == 0) { 3106 sctp_mobility_feature_off(inp, SCTP_MOBILITY_FASTHANDOFF); 3107 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3108 } else { 3109 sctp_mobility_feature_on(inp, SCTP_MOBILITY_FASTHANDOFF); 3110 sctp_mobility_feature_off(inp, SCTP_MOBILITY_PRIM_DELETED); 3111 } 3112 } else { 3113 /* 3114 * bind specific, make sure flags is off and add a new 3115 * address structure to the sctp_addr_list inside the ep 3116 * structure. 3117 * 3118 * We will need to allocate one and insert it at the head. The 3119 * socketopt call can just insert new addresses in there as 3120 * well. It will also have to do the embed scope kame hack 3121 * too (before adding). 3122 */ 3123 struct sctp_ifa *ifa; 3124 struct sockaddr_storage store_sa; 3125 3126 memset(&store_sa, 0, sizeof(store_sa)); 3127 switch (addr->sa_family) { 3128 #ifdef INET 3129 case AF_INET: 3130 { 3131 struct sockaddr_in *sin; 3132 3133 sin = (struct sockaddr_in *)&store_sa; 3134 memcpy(sin, addr, sizeof(struct sockaddr_in)); 3135 sin->sin_port = 0; 3136 break; 3137 } 3138 #endif 3139 #ifdef INET6 3140 case AF_INET6: 3141 { 3142 struct sockaddr_in6 *sin6; 3143 3144 sin6 = (struct sockaddr_in6 *)&store_sa; 3145 memcpy(sin6, addr, sizeof(struct sockaddr_in6)); 3146 sin6->sin6_port = 0; 3147 break; 3148 } 3149 #endif 3150 default: 3151 break; 3152 } 3153 /* 3154 * first find the interface with the bound address need to 3155 * zero out the port to find the address! yuck! can't do 3156 * this earlier since need port for sctp_pcb_findep() 3157 */ 3158 if (sctp_ifap != NULL) { 3159 ifa = sctp_ifap; 3160 } else { 3161 /* 3162 * Note for BSD we hit here always other O/S's will 3163 * pass things in via the sctp_ifap argument 3164 * (Panda). 3165 */ 3166 ifa = sctp_find_ifa_by_addr((struct sockaddr *)&store_sa, 3167 vrf_id, SCTP_ADDR_NOT_LOCKED); 3168 } 3169 if (ifa == NULL) { 3170 /* Can't find an interface with that address */ 3171 SCTP_INP_WUNLOCK(inp); 3172 SCTP_INP_INFO_WUNLOCK(); 3173 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EADDRNOTAVAIL); 3174 return (EADDRNOTAVAIL); 3175 } 3176 #ifdef INET6 3177 if (addr->sa_family == AF_INET6) { 3178 /* GAK, more FIXME IFA lock? */ 3179 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 3180 /* Can't bind a non-existent addr. */ 3181 SCTP_INP_WUNLOCK(inp); 3182 SCTP_INP_INFO_WUNLOCK(); 3183 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 3184 return (EINVAL); 3185 } 3186 } 3187 #endif 3188 /* we're not bound all */ 3189 inp->sctp_flags &= ~SCTP_PCB_FLAGS_BOUNDALL; 3190 /* allow bindx() to send ASCONF's for binding changes */ 3191 sctp_feature_on(inp, SCTP_PCB_FLAGS_DO_ASCONF); 3192 /* clear automatic addr changes from kernel flag */ 3193 sctp_feature_off(inp, SCTP_PCB_FLAGS_AUTO_ASCONF); 3194 3195 /* add this address to the endpoint list */ 3196 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, 0); 3197 if (error != 0) { 3198 SCTP_INP_WUNLOCK(inp); 3199 SCTP_INP_INFO_WUNLOCK(); 3200 return (error); 3201 } 3202 inp->laddr_count++; 3203 } 3204 /* find the bucket */ 3205 if (port_reuse_active) { 3206 /* Put it into tcp 1-2-1 hash */ 3207 head = &SCTP_BASE_INFO(sctp_tcpephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashtcpmark))]; 3208 inp->sctp_flags |= SCTP_PCB_FLAGS_IN_TCPPOOL; 3209 } else { 3210 head = &SCTP_BASE_INFO(sctp_ephash)[SCTP_PCBHASH_ALLADDR(lport, SCTP_BASE_INFO(hashmark))]; 3211 } 3212 /* put it in the bucket */ 3213 LIST_INSERT_HEAD(head, inp, sctp_hash); 3214 SCTPDBG(SCTP_DEBUG_PCB1, "Main hash to bind at head:%p, bound port:%d - in tcp_pool=%d\n", 3215 (void *)head, ntohs(lport), port_reuse_active); 3216 /* set in the port */ 3217 inp->sctp_lport = lport; 3218 3219 /* turn off just the unbound flag */ 3220 inp->sctp_flags &= ~SCTP_PCB_FLAGS_UNBOUND; 3221 SCTP_INP_WUNLOCK(inp); 3222 SCTP_INP_INFO_WUNLOCK(); 3223 return (0); 3224 } 3225 3226 3227 static void 3228 sctp_iterator_inp_being_freed(struct sctp_inpcb *inp) 3229 { 3230 struct sctp_iterator *it, *nit; 3231 3232 /* 3233 * We enter with the only the ITERATOR_LOCK in place and a write 3234 * lock on the inp_info stuff. 3235 */ 3236 it = sctp_it_ctl.cur_it; 3237 if (it && (it->vn != curvnet)) { 3238 /* Its not looking at our VNET */ 3239 return; 3240 } 3241 if (it && (it->inp == inp)) { 3242 /* 3243 * This is tricky and we hold the iterator lock, but when it 3244 * returns and gets the lock (when we release it) the 3245 * iterator will try to operate on inp. We need to stop that 3246 * from happening. But of course the iterator has a 3247 * reference on the stcb and inp. We can mark it and it will 3248 * stop. 3249 * 3250 * If its a single iterator situation, we set the end iterator 3251 * flag. Otherwise we set the iterator to go to the next 3252 * inp. 3253 * 3254 */ 3255 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3256 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 3257 } else { 3258 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_INP; 3259 } 3260 } 3261 /* 3262 * Now go through and remove any single reference to our inp that 3263 * may be still pending on the list 3264 */ 3265 SCTP_IPI_ITERATOR_WQ_LOCK(); 3266 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 3267 if (it->vn != curvnet) { 3268 continue; 3269 } 3270 if (it->inp == inp) { 3271 /* This one points to me is it inp specific? */ 3272 if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) { 3273 /* Remove and free this one */ 3274 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, 3275 it, sctp_nxt_itr); 3276 if (it->function_atend != NULL) { 3277 (*it->function_atend) (it->pointer, it->val); 3278 } 3279 SCTP_FREE(it, SCTP_M_ITER); 3280 } else { 3281 it->inp = LIST_NEXT(it->inp, sctp_list); 3282 if (it->inp) { 3283 SCTP_INP_INCR_REF(it->inp); 3284 } 3285 } 3286 /* 3287 * When its put in the refcnt is incremented so decr 3288 * it 3289 */ 3290 SCTP_INP_DECR_REF(inp); 3291 } 3292 } 3293 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 3294 } 3295 3296 /* release sctp_inpcb unbind the port */ 3297 void 3298 sctp_inpcb_free(struct sctp_inpcb *inp, int immediate, int from) 3299 { 3300 /* 3301 * Here we free a endpoint. We must find it (if it is in the Hash 3302 * table) and remove it from there. Then we must also find it in the 3303 * overall list and remove it from there. After all removals are 3304 * complete then any timer has to be stopped. Then start the actual 3305 * freeing. a) Any local lists. b) Any associations. c) The hash of 3306 * all associations. d) finally the ep itself. 3307 */ 3308 struct sctp_tcb *asoc, *nasoc; 3309 struct sctp_laddr *laddr, *nladdr; 3310 struct inpcb *ip_pcb; 3311 struct socket *so; 3312 int being_refed = 0; 3313 struct sctp_queued_to_read *sq, *nsq; 3314 int cnt; 3315 sctp_sharedkey_t *shared_key, *nshared_key; 3316 3317 3318 #ifdef SCTP_LOG_CLOSING 3319 sctp_log_closing(inp, NULL, 0); 3320 #endif 3321 SCTP_ITERATOR_LOCK(); 3322 /* mark any iterators on the list or being processed */ 3323 sctp_iterator_inp_being_freed(inp); 3324 SCTP_ITERATOR_UNLOCK(); 3325 so = inp->sctp_socket; 3326 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 3327 /* been here before.. eeks.. get out of here */ 3328 SCTP_PRINTF("This conflict in free SHOULD not be happening! from %d, imm %d\n", from, immediate); 3329 #ifdef SCTP_LOG_CLOSING 3330 sctp_log_closing(inp, NULL, 1); 3331 #endif 3332 return; 3333 } 3334 SCTP_ASOC_CREATE_LOCK(inp); 3335 SCTP_INP_INFO_WLOCK(); 3336 3337 SCTP_INP_WLOCK(inp); 3338 if (from == SCTP_CALLED_AFTER_CMPSET_OFCLOSE) { 3339 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CLOSE_IP; 3340 /* socket is gone, so no more wakeups allowed */ 3341 inp->sctp_flags |= SCTP_PCB_FLAGS_DONT_WAKE; 3342 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEINPUT; 3343 inp->sctp_flags &= ~SCTP_PCB_FLAGS_WAKEOUTPUT; 3344 3345 } 3346 /* First time through we have the socket lock, after that no more. */ 3347 sctp_timer_stop(SCTP_TIMER_TYPE_NEWCOOKIE, inp, NULL, NULL, 3348 SCTP_FROM_SCTP_PCB + SCTP_LOC_1); 3349 3350 if (inp->control) { 3351 sctp_m_freem(inp->control); 3352 inp->control = NULL; 3353 } 3354 if (inp->pkt) { 3355 sctp_m_freem(inp->pkt); 3356 inp->pkt = NULL; 3357 } 3358 ip_pcb = &inp->ip_inp.inp; /* we could just cast the main pointer 3359 * here but I will be nice :> (i.e. 3360 * ip_pcb = ep;) */ 3361 if (immediate == SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE) { 3362 int cnt_in_sd; 3363 3364 cnt_in_sd = 0; 3365 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3366 SCTP_TCB_LOCK(asoc); 3367 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3368 /* Skip guys being freed */ 3369 cnt_in_sd++; 3370 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3371 /* 3372 * Special case - we did not start a 3373 * kill timer on the asoc due to it 3374 * was not closed. So go ahead and 3375 * start it now. 3376 */ 3377 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3378 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3379 } 3380 SCTP_TCB_UNLOCK(asoc); 3381 continue; 3382 } 3383 if (((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_WAIT) || 3384 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_COOKIE_ECHOED)) && 3385 (asoc->asoc.total_output_queue_size == 0)) { 3386 /* 3387 * If we have data in queue, we don't want 3388 * to just free since the app may have done, 3389 * send()/close or connect/send/close. And 3390 * it wants the data to get across first. 3391 */ 3392 /* Just abandon things in the front states */ 3393 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_NOFORCE, 3394 SCTP_FROM_SCTP_PCB + SCTP_LOC_2) == 0) { 3395 cnt_in_sd++; 3396 } 3397 continue; 3398 } 3399 /* Disconnect the socket please */ 3400 asoc->sctp_socket = NULL; 3401 asoc->asoc.state |= SCTP_STATE_CLOSED_SOCKET; 3402 if ((asoc->asoc.size_on_reasm_queue > 0) || 3403 (asoc->asoc.control_pdapi) || 3404 (asoc->asoc.size_on_all_streams > 0) || 3405 (so && (so->so_rcv.sb_cc > 0))) { 3406 /* Left with Data unread */ 3407 struct mbuf *op_err; 3408 3409 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3410 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_3; 3411 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3412 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3413 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3414 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3415 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3416 } 3417 if (sctp_free_assoc(inp, asoc, 3418 SCTP_PCBFREE_NOFORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_4) == 0) { 3419 cnt_in_sd++; 3420 } 3421 continue; 3422 } else if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3423 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3424 (asoc->asoc.stream_queue_cnt == 0)) { 3425 if (asoc->asoc.locked_on_sending) { 3426 goto abort_anyway; 3427 } 3428 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_SENT) && 3429 (SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_SHUTDOWN_ACK_SENT)) { 3430 struct sctp_nets *netp; 3431 3432 /* 3433 * there is nothing queued to send, 3434 * so I send shutdown 3435 */ 3436 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3437 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3438 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3439 } 3440 SCTP_SET_STATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_SENT); 3441 SCTP_CLEAR_SUBSTATE(&asoc->asoc, SCTP_STATE_SHUTDOWN_PENDING); 3442 sctp_stop_timers_for_shutdown(asoc); 3443 if (asoc->asoc.alternate) { 3444 netp = asoc->asoc.alternate; 3445 } else { 3446 netp = asoc->asoc.primary_destination; 3447 } 3448 sctp_send_shutdown(asoc, netp); 3449 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWN, asoc->sctp_ep, asoc, 3450 netp); 3451 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3452 asoc->asoc.primary_destination); 3453 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_LOCKED); 3454 } 3455 } else { 3456 /* mark into shutdown pending */ 3457 struct sctp_stream_queue_pending *sp; 3458 3459 asoc->asoc.state |= SCTP_STATE_SHUTDOWN_PENDING; 3460 sctp_timer_start(SCTP_TIMER_TYPE_SHUTDOWNGUARD, asoc->sctp_ep, asoc, 3461 asoc->asoc.primary_destination); 3462 if (asoc->asoc.locked_on_sending) { 3463 sp = TAILQ_LAST(&((asoc->asoc.locked_on_sending)->outqueue), 3464 sctp_streamhead); 3465 if (sp == NULL) { 3466 SCTP_PRINTF("Error, sp is NULL, locked on sending is %p strm:%d\n", 3467 (void *)asoc->asoc.locked_on_sending, 3468 asoc->asoc.locked_on_sending->stream_no); 3469 } else { 3470 if ((sp->length == 0) && (sp->msg_is_complete == 0)) 3471 asoc->asoc.state |= SCTP_STATE_PARTIAL_MSG_LEFT; 3472 } 3473 } 3474 if (TAILQ_EMPTY(&asoc->asoc.send_queue) && 3475 TAILQ_EMPTY(&asoc->asoc.sent_queue) && 3476 (asoc->asoc.state & SCTP_STATE_PARTIAL_MSG_LEFT)) { 3477 struct mbuf *op_err; 3478 3479 abort_anyway: 3480 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3481 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_5; 3482 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3483 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3484 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3485 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3486 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3487 } 3488 if (sctp_free_assoc(inp, asoc, 3489 SCTP_PCBFREE_NOFORCE, 3490 SCTP_FROM_SCTP_PCB + SCTP_LOC_6) == 0) { 3491 cnt_in_sd++; 3492 } 3493 continue; 3494 } else { 3495 sctp_chunk_output(inp, asoc, SCTP_OUTPUT_FROM_CLOSING, SCTP_SO_LOCKED); 3496 } 3497 } 3498 cnt_in_sd++; 3499 SCTP_TCB_UNLOCK(asoc); 3500 } 3501 /* now is there some left in our SHUTDOWN state? */ 3502 if (cnt_in_sd) { 3503 #ifdef SCTP_LOG_CLOSING 3504 sctp_log_closing(inp, NULL, 2); 3505 #endif 3506 inp->sctp_socket = NULL; 3507 SCTP_INP_WUNLOCK(inp); 3508 SCTP_ASOC_CREATE_UNLOCK(inp); 3509 SCTP_INP_INFO_WUNLOCK(); 3510 return; 3511 } 3512 } 3513 inp->sctp_socket = NULL; 3514 if ((inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) != 3515 SCTP_PCB_FLAGS_UNBOUND) { 3516 /* 3517 * ok, this guy has been bound. It's port is somewhere in 3518 * the SCTP_BASE_INFO(hash table). Remove it! 3519 */ 3520 LIST_REMOVE(inp, sctp_hash); 3521 inp->sctp_flags |= SCTP_PCB_FLAGS_UNBOUND; 3522 } 3523 /* 3524 * If there is a timer running to kill us, forget it, since it may 3525 * have a contest on the INP lock.. which would cause us to die ... 3526 */ 3527 cnt = 0; 3528 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_list, sctp_tcblist, nasoc) { 3529 SCTP_TCB_LOCK(asoc); 3530 if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3531 if (asoc->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE) { 3532 asoc->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 3533 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, asoc, NULL); 3534 } 3535 cnt++; 3536 SCTP_TCB_UNLOCK(asoc); 3537 continue; 3538 } 3539 /* Free associations that are NOT killing us */ 3540 if ((SCTP_GET_STATE(&asoc->asoc) != SCTP_STATE_COOKIE_WAIT) && 3541 ((asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0)) { 3542 struct mbuf *op_err; 3543 3544 op_err = sctp_generate_cause(SCTP_CAUSE_USER_INITIATED_ABT, ""); 3545 asoc->sctp_ep->last_abort_code = SCTP_FROM_SCTP_PCB + SCTP_LOC_7; 3546 sctp_send_abort_tcb(asoc, op_err, SCTP_SO_LOCKED); 3547 SCTP_STAT_INCR_COUNTER32(sctps_aborted); 3548 } else if (asoc->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) { 3549 cnt++; 3550 SCTP_TCB_UNLOCK(asoc); 3551 continue; 3552 } 3553 if ((SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_OPEN) || 3554 (SCTP_GET_STATE(&asoc->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) { 3555 SCTP_STAT_DECR_GAUGE32(sctps_currestab); 3556 } 3557 if (sctp_free_assoc(inp, asoc, SCTP_PCBFREE_FORCE, SCTP_FROM_SCTP_PCB + SCTP_LOC_8) == 0) { 3558 cnt++; 3559 } 3560 } 3561 if (cnt) { 3562 /* Ok we have someone out there that will kill us */ 3563 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3564 #ifdef SCTP_LOG_CLOSING 3565 sctp_log_closing(inp, NULL, 3); 3566 #endif 3567 SCTP_INP_WUNLOCK(inp); 3568 SCTP_ASOC_CREATE_UNLOCK(inp); 3569 SCTP_INP_INFO_WUNLOCK(); 3570 return; 3571 } 3572 if (SCTP_INP_LOCK_CONTENDED(inp)) 3573 being_refed++; 3574 if (SCTP_INP_READ_CONTENDED(inp)) 3575 being_refed++; 3576 if (SCTP_ASOC_CREATE_LOCK_CONTENDED(inp)) 3577 being_refed++; 3578 3579 if ((inp->refcount) || 3580 (being_refed) || 3581 (inp->sctp_flags & SCTP_PCB_FLAGS_CLOSE_IP)) { 3582 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3583 #ifdef SCTP_LOG_CLOSING 3584 sctp_log_closing(inp, NULL, 4); 3585 #endif 3586 sctp_timer_start(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL); 3587 SCTP_INP_WUNLOCK(inp); 3588 SCTP_ASOC_CREATE_UNLOCK(inp); 3589 SCTP_INP_INFO_WUNLOCK(); 3590 return; 3591 } 3592 inp->sctp_ep.signature_change.type = 0; 3593 inp->sctp_flags |= SCTP_PCB_FLAGS_SOCKET_ALLGONE; 3594 /* 3595 * Remove it from the list .. last thing we need a lock for. 3596 */ 3597 LIST_REMOVE(inp, sctp_list); 3598 SCTP_INP_WUNLOCK(inp); 3599 SCTP_ASOC_CREATE_UNLOCK(inp); 3600 SCTP_INP_INFO_WUNLOCK(); 3601 /* 3602 * Now we release all locks. Since this INP cannot be found anymore 3603 * except possibly by the kill timer that might be running. We call 3604 * the drain function here. It should hit the case were it sees the 3605 * ACTIVE flag cleared and exit out freeing us to proceed and 3606 * destroy everything. 3607 */ 3608 if (from != SCTP_CALLED_FROM_INPKILL_TIMER) { 3609 (void)SCTP_OS_TIMER_STOP_DRAIN(&inp->sctp_ep.signature_change.timer); 3610 } else { 3611 /* Probably un-needed */ 3612 (void)SCTP_OS_TIMER_STOP(&inp->sctp_ep.signature_change.timer); 3613 } 3614 3615 #ifdef SCTP_LOG_CLOSING 3616 sctp_log_closing(inp, NULL, 5); 3617 #endif 3618 3619 3620 if ((inp->sctp_asocidhash) != NULL) { 3621 SCTP_HASH_FREE(inp->sctp_asocidhash, inp->hashasocidmark); 3622 inp->sctp_asocidhash = NULL; 3623 } 3624 /* sa_ignore FREED_MEMORY */ 3625 TAILQ_FOREACH_SAFE(sq, &inp->read_queue, next, nsq) { 3626 /* Its only abandoned if it had data left */ 3627 if (sq->length) 3628 SCTP_STAT_INCR(sctps_left_abandon); 3629 3630 TAILQ_REMOVE(&inp->read_queue, sq, next); 3631 sctp_free_remote_addr(sq->whoFrom); 3632 if (so) 3633 so->so_rcv.sb_cc -= sq->length; 3634 if (sq->data) { 3635 sctp_m_freem(sq->data); 3636 sq->data = NULL; 3637 } 3638 /* 3639 * no need to free the net count, since at this point all 3640 * assoc's are gone. 3641 */ 3642 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 3643 SCTP_DECR_READQ_COUNT(); 3644 } 3645 /* Now the sctp_pcb things */ 3646 /* 3647 * free each asoc if it is not already closed/free. we can't use the 3648 * macro here since le_next will get freed as part of the 3649 * sctp_free_assoc() call. 3650 */ 3651 if (so) { 3652 #ifdef IPSEC 3653 ipsec_delete_pcbpolicy(ip_pcb); 3654 #endif /* IPSEC */ 3655 3656 /* Unlocks not needed since the socket is gone now */ 3657 } 3658 if (ip_pcb->inp_options) { 3659 (void)sctp_m_free(ip_pcb->inp_options); 3660 ip_pcb->inp_options = 0; 3661 } 3662 #ifdef INET6 3663 if (ip_pcb->inp_vflag & INP_IPV6) { 3664 struct in6pcb *in6p; 3665 3666 in6p = (struct in6pcb *)inp; 3667 ip6_freepcbopts(in6p->in6p_outputopts); 3668 } 3669 #endif /* INET6 */ 3670 ip_pcb->inp_vflag = 0; 3671 /* free up authentication fields */ 3672 if (inp->sctp_ep.local_auth_chunks != NULL) 3673 sctp_free_chunklist(inp->sctp_ep.local_auth_chunks); 3674 if (inp->sctp_ep.local_hmacs != NULL) 3675 sctp_free_hmaclist(inp->sctp_ep.local_hmacs); 3676 3677 LIST_FOREACH_SAFE(shared_key, &inp->sctp_ep.shared_keys, next, nshared_key) { 3678 LIST_REMOVE(shared_key, next); 3679 sctp_free_sharedkey(shared_key); 3680 /* sa_ignore FREED_MEMORY */ 3681 } 3682 3683 /* 3684 * if we have an address list the following will free the list of 3685 * ifaddr's that are set into this ep. Again macro limitations here, 3686 * since the LIST_FOREACH could be a bad idea. 3687 */ 3688 LIST_FOREACH_SAFE(laddr, &inp->sctp_addr_list, sctp_nxt_addr, nladdr) { 3689 sctp_remove_laddr(laddr); 3690 } 3691 3692 #ifdef SCTP_TRACK_FREED_ASOCS 3693 /* TEMP CODE */ 3694 LIST_FOREACH_SAFE(asoc, &inp->sctp_asoc_free_list, sctp_tcblist, nasoc) { 3695 LIST_REMOVE(asoc, sctp_tcblist); 3696 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), asoc); 3697 SCTP_DECR_ASOC_COUNT(); 3698 } 3699 /* *** END TEMP CODE *** */ 3700 #endif 3701 /* Now lets see about freeing the EP hash table. */ 3702 if (inp->sctp_tcbhash != NULL) { 3703 SCTP_HASH_FREE(inp->sctp_tcbhash, inp->sctp_hashmark); 3704 inp->sctp_tcbhash = NULL; 3705 } 3706 /* Now we must put the ep memory back into the zone pool */ 3707 crfree(inp->ip_inp.inp.inp_cred); 3708 INP_LOCK_DESTROY(&inp->ip_inp.inp); 3709 SCTP_INP_LOCK_DESTROY(inp); 3710 SCTP_INP_READ_DESTROY(inp); 3711 SCTP_ASOC_CREATE_LOCK_DESTROY(inp); 3712 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_ep), inp); 3713 SCTP_DECR_EP_COUNT(); 3714 } 3715 3716 3717 struct sctp_nets * 3718 sctp_findnet(struct sctp_tcb *stcb, struct sockaddr *addr) 3719 { 3720 struct sctp_nets *net; 3721 3722 /* locate the address */ 3723 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 3724 if (sctp_cmpaddr(addr, (struct sockaddr *)&net->ro._l_addr)) 3725 return (net); 3726 } 3727 return (NULL); 3728 } 3729 3730 3731 int 3732 sctp_is_address_on_local_host(struct sockaddr *addr, uint32_t vrf_id) 3733 { 3734 struct sctp_ifa *sctp_ifa; 3735 3736 sctp_ifa = sctp_find_ifa_by_addr(addr, vrf_id, SCTP_ADDR_NOT_LOCKED); 3737 if (sctp_ifa) { 3738 return (1); 3739 } else { 3740 return (0); 3741 } 3742 } 3743 3744 /* 3745 * add's a remote endpoint address, done with the INIT/INIT-ACK as well as 3746 * when a ASCONF arrives that adds it. It will also initialize all the cwnd 3747 * stats of stuff. 3748 */ 3749 int 3750 sctp_add_remote_addr(struct sctp_tcb *stcb, struct sockaddr *newaddr, 3751 struct sctp_nets **netp, int set_scope, int from) 3752 { 3753 /* 3754 * The following is redundant to the same lines in the 3755 * sctp_aloc_assoc() but is needed since others call the add address 3756 * function 3757 */ 3758 struct sctp_nets *net, *netfirst; 3759 int addr_inscope; 3760 3761 SCTPDBG(SCTP_DEBUG_PCB1, "Adding an address (from:%d) to the peer: ", 3762 from); 3763 SCTPDBG_ADDR(SCTP_DEBUG_PCB1, newaddr); 3764 3765 netfirst = sctp_findnet(stcb, newaddr); 3766 if (netfirst) { 3767 /* 3768 * Lie and return ok, we don't want to make the association 3769 * go away for this behavior. It will happen in the TCP 3770 * model in a connected socket. It does not reach the hash 3771 * table until after the association is built so it can't be 3772 * found. Mark as reachable, since the initial creation will 3773 * have been cleared and the NOT_IN_ASSOC flag will have 3774 * been added... and we don't want to end up removing it 3775 * back out. 3776 */ 3777 if (netfirst->dest_state & SCTP_ADDR_UNCONFIRMED) { 3778 netfirst->dest_state = (SCTP_ADDR_REACHABLE | 3779 SCTP_ADDR_UNCONFIRMED); 3780 } else { 3781 netfirst->dest_state = SCTP_ADDR_REACHABLE; 3782 } 3783 3784 return (0); 3785 } 3786 addr_inscope = 1; 3787 switch (newaddr->sa_family) { 3788 #ifdef INET 3789 case AF_INET: 3790 { 3791 struct sockaddr_in *sin; 3792 3793 sin = (struct sockaddr_in *)newaddr; 3794 if (sin->sin_addr.s_addr == 0) { 3795 /* Invalid address */ 3796 return (-1); 3797 } 3798 /* zero out the bzero area */ 3799 memset(&sin->sin_zero, 0, sizeof(sin->sin_zero)); 3800 3801 /* assure len is set */ 3802 sin->sin_len = sizeof(struct sockaddr_in); 3803 if (set_scope) { 3804 #ifdef SCTP_DONT_DO_PRIVADDR_SCOPE 3805 stcb->asoc.scope.ipv4_local_scope = 1; 3806 #else 3807 if (IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) { 3808 stcb->asoc.scope.ipv4_local_scope = 1; 3809 } 3810 #endif /* SCTP_DONT_DO_PRIVADDR_SCOPE */ 3811 } else { 3812 /* Validate the address is in scope */ 3813 if ((IN4_ISPRIVATE_ADDRESS(&sin->sin_addr)) && 3814 (stcb->asoc.scope.ipv4_local_scope == 0)) { 3815 addr_inscope = 0; 3816 } 3817 } 3818 break; 3819 } 3820 #endif 3821 #ifdef INET6 3822 case AF_INET6: 3823 { 3824 struct sockaddr_in6 *sin6; 3825 3826 sin6 = (struct sockaddr_in6 *)newaddr; 3827 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 3828 /* Invalid address */ 3829 return (-1); 3830 } 3831 /* assure len is set */ 3832 sin6->sin6_len = sizeof(struct sockaddr_in6); 3833 if (set_scope) { 3834 if (sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id)) { 3835 stcb->asoc.scope.loopback_scope = 1; 3836 stcb->asoc.scope.local_scope = 0; 3837 stcb->asoc.scope.ipv4_local_scope = 1; 3838 stcb->asoc.scope.site_scope = 1; 3839 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 3840 /* 3841 * If the new destination is a 3842 * LINK_LOCAL we must have common 3843 * site scope. Don't set the local 3844 * scope since we may not share all 3845 * links, only loopback can do this. 3846 * Links on the local network would 3847 * also be on our private network 3848 * for v4 too. 3849 */ 3850 stcb->asoc.scope.ipv4_local_scope = 1; 3851 stcb->asoc.scope.site_scope = 1; 3852 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr)) { 3853 /* 3854 * If the new destination is 3855 * SITE_LOCAL then we must have site 3856 * scope in common. 3857 */ 3858 stcb->asoc.scope.site_scope = 1; 3859 } 3860 } else { 3861 /* Validate the address is in scope */ 3862 if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr) && 3863 (stcb->asoc.scope.loopback_scope == 0)) { 3864 addr_inscope = 0; 3865 } else if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) && 3866 (stcb->asoc.scope.local_scope == 0)) { 3867 addr_inscope = 0; 3868 } else if (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) && 3869 (stcb->asoc.scope.site_scope == 0)) { 3870 addr_inscope = 0; 3871 } 3872 } 3873 break; 3874 } 3875 #endif 3876 default: 3877 /* not supported family type */ 3878 return (-1); 3879 } 3880 net = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_net), struct sctp_nets); 3881 if (net == NULL) { 3882 return (-1); 3883 } 3884 SCTP_INCR_RADDR_COUNT(); 3885 bzero(net, sizeof(struct sctp_nets)); 3886 (void)SCTP_GETTIME_TIMEVAL(&net->start_time); 3887 memcpy(&net->ro._l_addr, newaddr, newaddr->sa_len); 3888 switch (newaddr->sa_family) { 3889 #ifdef INET 3890 case AF_INET: 3891 ((struct sockaddr_in *)&net->ro._l_addr)->sin_port = stcb->rport; 3892 break; 3893 #endif 3894 #ifdef INET6 3895 case AF_INET6: 3896 ((struct sockaddr_in6 *)&net->ro._l_addr)->sin6_port = stcb->rport; 3897 break; 3898 #endif 3899 default: 3900 break; 3901 } 3902 net->addr_is_local = sctp_is_address_on_local_host(newaddr, stcb->asoc.vrf_id); 3903 if (net->addr_is_local && ((set_scope || (from == SCTP_ADDR_IS_CONFIRMED)))) { 3904 stcb->asoc.scope.loopback_scope = 1; 3905 stcb->asoc.scope.ipv4_local_scope = 1; 3906 stcb->asoc.scope.local_scope = 0; 3907 stcb->asoc.scope.site_scope = 1; 3908 addr_inscope = 1; 3909 } 3910 net->failure_threshold = stcb->asoc.def_net_failure; 3911 net->pf_threshold = stcb->asoc.def_net_pf_threshold; 3912 if (addr_inscope == 0) { 3913 net->dest_state = (SCTP_ADDR_REACHABLE | 3914 SCTP_ADDR_OUT_OF_SCOPE); 3915 } else { 3916 if (from == SCTP_ADDR_IS_CONFIRMED) 3917 /* SCTP_ADDR_IS_CONFIRMED is passed by connect_x */ 3918 net->dest_state = SCTP_ADDR_REACHABLE; 3919 else 3920 net->dest_state = SCTP_ADDR_REACHABLE | 3921 SCTP_ADDR_UNCONFIRMED; 3922 } 3923 /* 3924 * We set this to 0, the timer code knows that this means its an 3925 * initial value 3926 */ 3927 net->rto_needed = 1; 3928 net->RTO = 0; 3929 net->RTO_measured = 0; 3930 stcb->asoc.numnets++; 3931 net->ref_count = 1; 3932 net->cwr_window_tsn = net->last_cwr_tsn = stcb->asoc.sending_seq - 1; 3933 net->port = stcb->asoc.port; 3934 net->dscp = stcb->asoc.default_dscp; 3935 #ifdef INET6 3936 net->flowlabel = stcb->asoc.default_flowlabel; 3937 #endif 3938 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DONOT_HEARTBEAT)) { 3939 net->dest_state |= SCTP_ADDR_NOHB; 3940 } else { 3941 net->dest_state &= ~SCTP_ADDR_NOHB; 3942 } 3943 if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DO_NOT_PMTUD)) { 3944 net->dest_state |= SCTP_ADDR_NO_PMTUD; 3945 } else { 3946 net->dest_state &= ~SCTP_ADDR_NO_PMTUD; 3947 } 3948 net->heart_beat_delay = stcb->asoc.heart_beat_delay; 3949 /* Init the timer structure */ 3950 SCTP_OS_TIMER_INIT(&net->rxt_timer.timer); 3951 SCTP_OS_TIMER_INIT(&net->pmtu_timer.timer); 3952 SCTP_OS_TIMER_INIT(&net->hb_timer.timer); 3953 3954 /* Now generate a route for this guy */ 3955 #ifdef INET6 3956 /* KAME hack: embed scopeid */ 3957 if (newaddr->sa_family == AF_INET6) { 3958 struct sockaddr_in6 *sin6; 3959 3960 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 3961 (void)sa6_embedscope(sin6, MODULE_GLOBAL(ip6_use_defzone)); 3962 sin6->sin6_scope_id = 0; 3963 } 3964 #endif 3965 SCTP_RTALLOC((sctp_route_t *) & net->ro, stcb->asoc.vrf_id); 3966 3967 if (SCTP_ROUTE_HAS_VALID_IFN(&net->ro)) { 3968 /* Get source address */ 3969 net->ro._s_addr = sctp_source_address_selection(stcb->sctp_ep, 3970 stcb, 3971 (sctp_route_t *) & net->ro, 3972 net, 3973 0, 3974 stcb->asoc.vrf_id); 3975 if (net->ro._s_addr != NULL) { 3976 net->src_addr_selected = 1; 3977 /* Now get the interface MTU */ 3978 if (net->ro._s_addr->ifn_p != NULL) { 3979 net->mtu = SCTP_GATHER_MTU_FROM_INTFC(net->ro._s_addr->ifn_p); 3980 } 3981 } else { 3982 net->src_addr_selected = 0; 3983 } 3984 if (net->mtu > 0) { 3985 uint32_t rmtu; 3986 3987 rmtu = SCTP_GATHER_MTU_FROM_ROUTE(net->ro._s_addr, &net->ro._l_addr.sa, net->ro.ro_rt); 3988 if (rmtu == 0) { 3989 /* 3990 * Start things off to match mtu of 3991 * interface please. 3992 */ 3993 SCTP_SET_MTU_OF_ROUTE(&net->ro._l_addr.sa, 3994 net->ro.ro_rt, net->mtu); 3995 } else { 3996 /* 3997 * we take the route mtu over the interface, 3998 * since the route may be leading out the 3999 * loopback, or a different interface. 4000 */ 4001 net->mtu = rmtu; 4002 } 4003 } 4004 } else { 4005 net->src_addr_selected = 0; 4006 } 4007 if (net->mtu == 0) { 4008 switch (newaddr->sa_family) { 4009 #ifdef INET 4010 case AF_INET: 4011 net->mtu = SCTP_DEFAULT_MTU; 4012 break; 4013 #endif 4014 #ifdef INET6 4015 case AF_INET6: 4016 net->mtu = 1280; 4017 break; 4018 #endif 4019 default: 4020 break; 4021 } 4022 } 4023 #if defined(INET) || defined(INET6) 4024 if (net->port) { 4025 net->mtu -= (uint32_t) sizeof(struct udphdr); 4026 } 4027 #endif 4028 if (from == SCTP_ALLOC_ASOC) { 4029 stcb->asoc.smallest_mtu = net->mtu; 4030 } 4031 if (stcb->asoc.smallest_mtu > net->mtu) { 4032 stcb->asoc.smallest_mtu = net->mtu; 4033 } 4034 #ifdef INET6 4035 if (newaddr->sa_family == AF_INET6) { 4036 struct sockaddr_in6 *sin6; 4037 4038 sin6 = (struct sockaddr_in6 *)&net->ro._l_addr; 4039 (void)sa6_recoverscope(sin6); 4040 } 4041 #endif 4042 4043 /* JRS - Use the congestion control given in the CC module */ 4044 if (stcb->asoc.cc_functions.sctp_set_initial_cc_param != NULL) 4045 (*stcb->asoc.cc_functions.sctp_set_initial_cc_param) (stcb, net); 4046 4047 /* 4048 * CMT: CUC algo - set find_pseudo_cumack to TRUE (1) at beginning 4049 * of assoc (2005/06/27, iyengar@cis.udel.edu) 4050 */ 4051 net->find_pseudo_cumack = 1; 4052 net->find_rtx_pseudo_cumack = 1; 4053 /* Choose an initial flowid. */ 4054 net->flowid = stcb->asoc.my_vtag ^ 4055 ntohs(stcb->rport) ^ 4056 ntohs(stcb->sctp_ep->sctp_lport); 4057 #ifdef INVARIANTS 4058 net->flowidset = 1; 4059 #endif 4060 if (netp) { 4061 *netp = net; 4062 } 4063 netfirst = TAILQ_FIRST(&stcb->asoc.nets); 4064 if (net->ro.ro_rt == NULL) { 4065 /* Since we have no route put it at the back */ 4066 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4067 } else if (netfirst == NULL) { 4068 /* We are the first one in the pool. */ 4069 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4070 } else if (netfirst->ro.ro_rt == NULL) { 4071 /* 4072 * First one has NO route. Place this one ahead of the first 4073 * one. 4074 */ 4075 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4076 } else if (net->ro.ro_rt->rt_ifp != netfirst->ro.ro_rt->rt_ifp) { 4077 /* 4078 * This one has a different interface than the one at the 4079 * top of the list. Place it ahead. 4080 */ 4081 TAILQ_INSERT_HEAD(&stcb->asoc.nets, net, sctp_next); 4082 } else { 4083 /* 4084 * Ok we have the same interface as the first one. Move 4085 * forward until we find either a) one with a NULL route... 4086 * insert ahead of that b) one with a different ifp.. insert 4087 * after that. c) end of the list.. insert at the tail. 4088 */ 4089 struct sctp_nets *netlook; 4090 4091 do { 4092 netlook = TAILQ_NEXT(netfirst, sctp_next); 4093 if (netlook == NULL) { 4094 /* End of the list */ 4095 TAILQ_INSERT_TAIL(&stcb->asoc.nets, net, sctp_next); 4096 break; 4097 } else if (netlook->ro.ro_rt == NULL) { 4098 /* next one has NO route */ 4099 TAILQ_INSERT_BEFORE(netfirst, net, sctp_next); 4100 break; 4101 } else if (netlook->ro.ro_rt->rt_ifp != net->ro.ro_rt->rt_ifp) { 4102 TAILQ_INSERT_AFTER(&stcb->asoc.nets, netlook, 4103 net, sctp_next); 4104 break; 4105 } 4106 /* Shift forward */ 4107 netfirst = netlook; 4108 } while (netlook != NULL); 4109 } 4110 4111 /* got to have a primary set */ 4112 if (stcb->asoc.primary_destination == 0) { 4113 stcb->asoc.primary_destination = net; 4114 } else if ((stcb->asoc.primary_destination->ro.ro_rt == NULL) && 4115 (net->ro.ro_rt) && 4116 ((net->dest_state & SCTP_ADDR_UNCONFIRMED) == 0)) { 4117 /* No route to current primary adopt new primary */ 4118 stcb->asoc.primary_destination = net; 4119 } 4120 /* Validate primary is first */ 4121 net = TAILQ_FIRST(&stcb->asoc.nets); 4122 if ((net != stcb->asoc.primary_destination) && 4123 (stcb->asoc.primary_destination)) { 4124 /* 4125 * first one on the list is NOT the primary sctp_cmpaddr() 4126 * is much more efficient if the primary is the first on the 4127 * list, make it so. 4128 */ 4129 TAILQ_REMOVE(&stcb->asoc.nets, 4130 stcb->asoc.primary_destination, sctp_next); 4131 TAILQ_INSERT_HEAD(&stcb->asoc.nets, 4132 stcb->asoc.primary_destination, sctp_next); 4133 } 4134 return (0); 4135 } 4136 4137 4138 static uint32_t 4139 sctp_aloc_a_assoc_id(struct sctp_inpcb *inp, struct sctp_tcb *stcb) 4140 { 4141 uint32_t id; 4142 struct sctpasochead *head; 4143 struct sctp_tcb *lstcb; 4144 4145 SCTP_INP_WLOCK(inp); 4146 try_again: 4147 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 4148 /* TSNH */ 4149 SCTP_INP_WUNLOCK(inp); 4150 return (0); 4151 } 4152 /* 4153 * We don't allow assoc id to be one of SCTP_FUTURE_ASSOC, 4154 * SCTP_CURRENT_ASSOC and SCTP_ALL_ASSOC. 4155 */ 4156 if (inp->sctp_associd_counter <= SCTP_ALL_ASSOC) { 4157 inp->sctp_associd_counter = SCTP_ALL_ASSOC + 1; 4158 } 4159 id = inp->sctp_associd_counter; 4160 inp->sctp_associd_counter++; 4161 lstcb = sctp_findasoc_ep_asocid_locked(inp, (sctp_assoc_t) id, 0); 4162 if (lstcb) { 4163 goto try_again; 4164 } 4165 head = &inp->sctp_asocidhash[SCTP_PCBHASH_ASOC(id, inp->hashasocidmark)]; 4166 LIST_INSERT_HEAD(head, stcb, sctp_tcbasocidhash); 4167 stcb->asoc.in_asocid_hash = 1; 4168 SCTP_INP_WUNLOCK(inp); 4169 return id; 4170 } 4171 4172 /* 4173 * allocate an association and add it to the endpoint. The caller must be 4174 * careful to add all additional addresses once they are know right away or 4175 * else the assoc will be may experience a blackout scenario. 4176 */ 4177 struct sctp_tcb * 4178 sctp_aloc_assoc(struct sctp_inpcb *inp, struct sockaddr *firstaddr, 4179 int *error, uint32_t override_tag, uint32_t vrf_id, 4180 struct thread *p 4181 ) 4182 { 4183 /* note the p argument is only valid in unbound sockets */ 4184 4185 struct sctp_tcb *stcb; 4186 struct sctp_association *asoc; 4187 struct sctpasochead *head; 4188 uint16_t rport; 4189 int err; 4190 4191 /* 4192 * Assumption made here: Caller has done a 4193 * sctp_findassociation_ep_addr(ep, addr's); to make sure the 4194 * address does not exist already. 4195 */ 4196 if (SCTP_BASE_INFO(ipi_count_asoc) >= SCTP_MAX_NUM_OF_ASOC) { 4197 /* Hit max assoc, sorry no more */ 4198 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4199 *error = ENOBUFS; 4200 return (NULL); 4201 } 4202 if (firstaddr == NULL) { 4203 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4204 *error = EINVAL; 4205 return (NULL); 4206 } 4207 SCTP_INP_RLOCK(inp); 4208 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) && 4209 ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_PORTREUSE)) || 4210 (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) { 4211 /* 4212 * If its in the TCP pool, its NOT allowed to create an 4213 * association. The parent listener needs to call 4214 * sctp_aloc_assoc.. or the one-2-many socket. If a peeled 4215 * off, or connected one does this.. its an error. 4216 */ 4217 SCTP_INP_RUNLOCK(inp); 4218 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4219 *error = EINVAL; 4220 return (NULL); 4221 } 4222 if ((inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) || 4223 (inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)) { 4224 if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) || 4225 (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED)) { 4226 SCTP_INP_RUNLOCK(inp); 4227 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4228 *error = EINVAL; 4229 return (NULL); 4230 } 4231 } 4232 SCTPDBG(SCTP_DEBUG_PCB3, "Allocate an association for peer:"); 4233 #ifdef SCTP_DEBUG 4234 if (firstaddr) { 4235 SCTPDBG_ADDR(SCTP_DEBUG_PCB3, firstaddr); 4236 switch (firstaddr->sa_family) { 4237 #ifdef INET 4238 case AF_INET: 4239 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4240 ntohs(((struct sockaddr_in *)firstaddr)->sin_port)); 4241 break; 4242 #endif 4243 #ifdef INET6 4244 case AF_INET6: 4245 SCTPDBG(SCTP_DEBUG_PCB3, "Port:%d\n", 4246 ntohs(((struct sockaddr_in6 *)firstaddr)->sin6_port)); 4247 break; 4248 #endif 4249 default: 4250 break; 4251 } 4252 } else { 4253 SCTPDBG(SCTP_DEBUG_PCB3, "None\n"); 4254 } 4255 #endif /* SCTP_DEBUG */ 4256 switch (firstaddr->sa_family) { 4257 #ifdef INET 4258 case AF_INET: 4259 { 4260 struct sockaddr_in *sin; 4261 4262 sin = (struct sockaddr_in *)firstaddr; 4263 if ((ntohs(sin->sin_port) == 0) || 4264 (sin->sin_addr.s_addr == INADDR_ANY) || 4265 (sin->sin_addr.s_addr == INADDR_BROADCAST) || 4266 IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) { 4267 /* Invalid address */ 4268 SCTP_INP_RUNLOCK(inp); 4269 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4270 *error = EINVAL; 4271 return (NULL); 4272 } 4273 rport = sin->sin_port; 4274 break; 4275 } 4276 #endif 4277 #ifdef INET6 4278 case AF_INET6: 4279 { 4280 struct sockaddr_in6 *sin6; 4281 4282 sin6 = (struct sockaddr_in6 *)firstaddr; 4283 if ((ntohs(sin6->sin6_port) == 0) || 4284 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 4285 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 4286 /* Invalid address */ 4287 SCTP_INP_RUNLOCK(inp); 4288 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4289 *error = EINVAL; 4290 return (NULL); 4291 } 4292 rport = sin6->sin6_port; 4293 break; 4294 } 4295 #endif 4296 default: 4297 /* not supported family type */ 4298 SCTP_INP_RUNLOCK(inp); 4299 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4300 *error = EINVAL; 4301 return (NULL); 4302 } 4303 SCTP_INP_RUNLOCK(inp); 4304 if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) { 4305 /* 4306 * If you have not performed a bind, then we need to do the 4307 * ephemeral bind for you. 4308 */ 4309 if ((err = sctp_inpcb_bind(inp->sctp_socket, 4310 (struct sockaddr *)NULL, 4311 (struct sctp_ifa *)NULL, 4312 p 4313 ))) { 4314 /* bind error, probably perm */ 4315 *error = err; 4316 return (NULL); 4317 } 4318 } 4319 stcb = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_asoc), struct sctp_tcb); 4320 if (stcb == NULL) { 4321 /* out of memory? */ 4322 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 4323 *error = ENOMEM; 4324 return (NULL); 4325 } 4326 SCTP_INCR_ASOC_COUNT(); 4327 4328 bzero(stcb, sizeof(*stcb)); 4329 asoc = &stcb->asoc; 4330 4331 asoc->assoc_id = sctp_aloc_a_assoc_id(inp, stcb); 4332 SCTP_TCB_LOCK_INIT(stcb); 4333 SCTP_TCB_SEND_LOCK_INIT(stcb); 4334 stcb->rport = rport; 4335 /* setup back pointer's */ 4336 stcb->sctp_ep = inp; 4337 stcb->sctp_socket = inp->sctp_socket; 4338 if ((err = sctp_init_asoc(inp, stcb, override_tag, vrf_id))) { 4339 /* failed */ 4340 SCTP_TCB_LOCK_DESTROY(stcb); 4341 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4342 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4343 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4344 SCTP_DECR_ASOC_COUNT(); 4345 *error = err; 4346 return (NULL); 4347 } 4348 /* and the port */ 4349 SCTP_INP_INFO_WLOCK(); 4350 SCTP_INP_WLOCK(inp); 4351 if (inp->sctp_flags & (SCTP_PCB_FLAGS_SOCKET_GONE | SCTP_PCB_FLAGS_SOCKET_ALLGONE)) { 4352 /* inpcb freed while alloc going on */ 4353 SCTP_TCB_LOCK_DESTROY(stcb); 4354 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4355 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4356 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4357 SCTP_INP_WUNLOCK(inp); 4358 SCTP_INP_INFO_WUNLOCK(); 4359 SCTP_DECR_ASOC_COUNT(); 4360 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 4361 *error = EINVAL; 4362 return (NULL); 4363 } 4364 SCTP_TCB_LOCK(stcb); 4365 4366 /* now that my_vtag is set, add it to the hash */ 4367 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(stcb->asoc.my_vtag, SCTP_BASE_INFO(hashasocmark))]; 4368 /* put it in the bucket in the vtag hash of assoc's for the system */ 4369 LIST_INSERT_HEAD(head, stcb, sctp_asocs); 4370 SCTP_INP_INFO_WUNLOCK(); 4371 4372 if ((err = sctp_add_remote_addr(stcb, firstaddr, NULL, SCTP_DO_SETSCOPE, SCTP_ALLOC_ASOC))) { 4373 /* failure.. memory error? */ 4374 if (asoc->strmout) { 4375 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 4376 asoc->strmout = NULL; 4377 } 4378 if (asoc->mapping_array) { 4379 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 4380 asoc->mapping_array = NULL; 4381 } 4382 if (asoc->nr_mapping_array) { 4383 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 4384 asoc->nr_mapping_array = NULL; 4385 } 4386 SCTP_DECR_ASOC_COUNT(); 4387 SCTP_TCB_UNLOCK(stcb); 4388 SCTP_TCB_LOCK_DESTROY(stcb); 4389 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 4390 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4391 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 4392 SCTP_INP_WUNLOCK(inp); 4393 SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOBUFS); 4394 *error = ENOBUFS; 4395 return (NULL); 4396 } 4397 /* Init all the timers */ 4398 SCTP_OS_TIMER_INIT(&asoc->dack_timer.timer); 4399 SCTP_OS_TIMER_INIT(&asoc->strreset_timer.timer); 4400 SCTP_OS_TIMER_INIT(&asoc->asconf_timer.timer); 4401 SCTP_OS_TIMER_INIT(&asoc->shut_guard_timer.timer); 4402 SCTP_OS_TIMER_INIT(&asoc->autoclose_timer.timer); 4403 SCTP_OS_TIMER_INIT(&asoc->delayed_event_timer.timer); 4404 SCTP_OS_TIMER_INIT(&asoc->delete_prim_timer.timer); 4405 4406 LIST_INSERT_HEAD(&inp->sctp_asoc_list, stcb, sctp_tcblist); 4407 /* now file the port under the hash as well */ 4408 if (inp->sctp_tcbhash != NULL) { 4409 head = &inp->sctp_tcbhash[SCTP_PCBHASH_ALLADDR(stcb->rport, 4410 inp->sctp_hashmark)]; 4411 LIST_INSERT_HEAD(head, stcb, sctp_tcbhash); 4412 } 4413 SCTP_INP_WUNLOCK(inp); 4414 SCTPDBG(SCTP_DEBUG_PCB1, "Association %p now allocated\n", (void *)stcb); 4415 return (stcb); 4416 } 4417 4418 4419 void 4420 sctp_remove_net(struct sctp_tcb *stcb, struct sctp_nets *net) 4421 { 4422 struct sctp_association *asoc; 4423 4424 asoc = &stcb->asoc; 4425 asoc->numnets--; 4426 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 4427 if (net == asoc->primary_destination) { 4428 /* Reset primary */ 4429 struct sctp_nets *lnet; 4430 4431 lnet = TAILQ_FIRST(&asoc->nets); 4432 /* 4433 * Mobility adaptation Ideally, if deleted destination is 4434 * the primary, it becomes a fast retransmission trigger by 4435 * the subsequent SET PRIMARY. (by micchie) 4436 */ 4437 if (sctp_is_mobility_feature_on(stcb->sctp_ep, 4438 SCTP_MOBILITY_BASE) || 4439 sctp_is_mobility_feature_on(stcb->sctp_ep, 4440 SCTP_MOBILITY_FASTHANDOFF)) { 4441 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: primary dst is deleting\n"); 4442 if (asoc->deleted_primary != NULL) { 4443 SCTPDBG(SCTP_DEBUG_ASCONF1, "remove_net: deleted primary may be already stored\n"); 4444 goto out; 4445 } 4446 asoc->deleted_primary = net; 4447 atomic_add_int(&net->ref_count, 1); 4448 memset(&net->lastsa, 0, sizeof(net->lastsa)); 4449 memset(&net->lastsv, 0, sizeof(net->lastsv)); 4450 sctp_mobility_feature_on(stcb->sctp_ep, 4451 SCTP_MOBILITY_PRIM_DELETED); 4452 sctp_timer_start(SCTP_TIMER_TYPE_PRIM_DELETED, 4453 stcb->sctp_ep, stcb, NULL); 4454 } 4455 out: 4456 /* Try to find a confirmed primary */ 4457 asoc->primary_destination = sctp_find_alternate_net(stcb, lnet, 0); 4458 } 4459 if (net == asoc->last_data_chunk_from) { 4460 /* Reset primary */ 4461 asoc->last_data_chunk_from = TAILQ_FIRST(&asoc->nets); 4462 } 4463 if (net == asoc->last_control_chunk_from) { 4464 /* Clear net */ 4465 asoc->last_control_chunk_from = NULL; 4466 } 4467 if (net == stcb->asoc.alternate) { 4468 sctp_free_remote_addr(stcb->asoc.alternate); 4469 stcb->asoc.alternate = NULL; 4470 } 4471 sctp_free_remote_addr(net); 4472 } 4473 4474 /* 4475 * remove a remote endpoint address from an association, it will fail if the 4476 * address does not exist. 4477 */ 4478 int 4479 sctp_del_remote_addr(struct sctp_tcb *stcb, struct sockaddr *remaddr) 4480 { 4481 /* 4482 * Here we need to remove a remote address. This is quite simple, we 4483 * first find it in the list of address for the association 4484 * (tasoc->asoc.nets) and then if it is there, we do a LIST_REMOVE 4485 * on that item. Note we do not allow it to be removed if there are 4486 * no other addresses. 4487 */ 4488 struct sctp_association *asoc; 4489 struct sctp_nets *net, *nnet; 4490 4491 asoc = &stcb->asoc; 4492 4493 /* locate the address */ 4494 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 4495 if (net->ro._l_addr.sa.sa_family != remaddr->sa_family) { 4496 continue; 4497 } 4498 if (sctp_cmpaddr((struct sockaddr *)&net->ro._l_addr, 4499 remaddr)) { 4500 /* we found the guy */ 4501 if (asoc->numnets < 2) { 4502 /* Must have at LEAST two remote addresses */ 4503 return (-1); 4504 } else { 4505 sctp_remove_net(stcb, net); 4506 return (0); 4507 } 4508 } 4509 } 4510 /* not found. */ 4511 return (-2); 4512 } 4513 4514 void 4515 sctp_delete_from_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4516 { 4517 struct sctpvtaghead *chain; 4518 struct sctp_tagblock *twait_block; 4519 int found = 0; 4520 int i; 4521 4522 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4523 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4524 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4525 if ((twait_block->vtag_block[i].v_tag == tag) && 4526 (twait_block->vtag_block[i].lport == lport) && 4527 (twait_block->vtag_block[i].rport == rport)) { 4528 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4529 twait_block->vtag_block[i].v_tag = 0; 4530 twait_block->vtag_block[i].lport = 0; 4531 twait_block->vtag_block[i].rport = 0; 4532 found = 1; 4533 break; 4534 } 4535 } 4536 if (found) 4537 break; 4538 } 4539 } 4540 4541 int 4542 sctp_is_in_timewait(uint32_t tag, uint16_t lport, uint16_t rport) 4543 { 4544 struct sctpvtaghead *chain; 4545 struct sctp_tagblock *twait_block; 4546 int found = 0; 4547 int i; 4548 4549 SCTP_INP_INFO_WLOCK(); 4550 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4551 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4552 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4553 if ((twait_block->vtag_block[i].v_tag == tag) && 4554 (twait_block->vtag_block[i].lport == lport) && 4555 (twait_block->vtag_block[i].rport == rport)) { 4556 found = 1; 4557 break; 4558 } 4559 } 4560 if (found) 4561 break; 4562 } 4563 SCTP_INP_INFO_WUNLOCK(); 4564 return (found); 4565 } 4566 4567 4568 void 4569 sctp_add_vtag_to_timewait(uint32_t tag, uint32_t time, uint16_t lport, uint16_t rport) 4570 { 4571 struct sctpvtaghead *chain; 4572 struct sctp_tagblock *twait_block; 4573 struct timeval now; 4574 int set, i; 4575 4576 if (time == 0) { 4577 /* Its disabled */ 4578 return; 4579 } 4580 (void)SCTP_GETTIME_TIMEVAL(&now); 4581 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 4582 set = 0; 4583 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 4584 /* Block(s) present, lets find space, and expire on the fly */ 4585 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 4586 if ((twait_block->vtag_block[i].v_tag == 0) && 4587 !set) { 4588 twait_block->vtag_block[i].tv_sec_at_expire = 4589 now.tv_sec + time; 4590 twait_block->vtag_block[i].v_tag = tag; 4591 twait_block->vtag_block[i].lport = lport; 4592 twait_block->vtag_block[i].rport = rport; 4593 set = 1; 4594 } else if ((twait_block->vtag_block[i].v_tag) && 4595 ((long)twait_block->vtag_block[i].tv_sec_at_expire < now.tv_sec)) { 4596 /* Audit expires this guy */ 4597 twait_block->vtag_block[i].tv_sec_at_expire = 0; 4598 twait_block->vtag_block[i].v_tag = 0; 4599 twait_block->vtag_block[i].lport = 0; 4600 twait_block->vtag_block[i].rport = 0; 4601 if (set == 0) { 4602 /* Reuse it for my new tag */ 4603 twait_block->vtag_block[i].tv_sec_at_expire = now.tv_sec + time; 4604 twait_block->vtag_block[i].v_tag = tag; 4605 twait_block->vtag_block[i].lport = lport; 4606 twait_block->vtag_block[i].rport = rport; 4607 set = 1; 4608 } 4609 } 4610 } 4611 if (set) { 4612 /* 4613 * We only do up to the block where we can place our 4614 * tag for audits 4615 */ 4616 break; 4617 } 4618 } 4619 /* Need to add a new block to chain */ 4620 if (!set) { 4621 SCTP_MALLOC(twait_block, struct sctp_tagblock *, 4622 sizeof(struct sctp_tagblock), SCTP_M_TIMW); 4623 if (twait_block == NULL) { 4624 #ifdef INVARIANTS 4625 panic("Can not alloc tagblock"); 4626 #endif 4627 return; 4628 } 4629 memset(twait_block, 0, sizeof(struct sctp_tagblock)); 4630 LIST_INSERT_HEAD(chain, twait_block, sctp_nxt_tagblock); 4631 twait_block->vtag_block[0].tv_sec_at_expire = now.tv_sec + time; 4632 twait_block->vtag_block[0].v_tag = tag; 4633 twait_block->vtag_block[0].lport = lport; 4634 twait_block->vtag_block[0].rport = rport; 4635 } 4636 } 4637 4638 4639 4640 /*- 4641 * Free the association after un-hashing the remote port. This 4642 * function ALWAYS returns holding NO LOCK on the stcb. It DOES 4643 * expect that the input to this function IS a locked TCB. 4644 * It will return 0, if it did NOT destroy the association (instead 4645 * it unlocks it. It will return NON-zero if it either destroyed the 4646 * association OR the association is already destroyed. 4647 */ 4648 int 4649 sctp_free_assoc(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int from_inpcbfree, int from_location) 4650 { 4651 int i; 4652 struct sctp_association *asoc; 4653 struct sctp_nets *net, *nnet; 4654 struct sctp_laddr *laddr, *naddr; 4655 struct sctp_tmit_chunk *chk, *nchk; 4656 struct sctp_asconf_addr *aparam, *naparam; 4657 struct sctp_asconf_ack *aack, *naack; 4658 struct sctp_stream_reset_list *strrst, *nstrrst; 4659 struct sctp_queued_to_read *sq, *nsq; 4660 struct sctp_stream_queue_pending *sp, *nsp; 4661 sctp_sharedkey_t *shared_key, *nshared_key; 4662 struct socket *so; 4663 4664 /* first, lets purge the entry from the hash table. */ 4665 4666 #ifdef SCTP_LOG_CLOSING 4667 sctp_log_closing(inp, stcb, 6); 4668 #endif 4669 if (stcb->asoc.state == 0) { 4670 #ifdef SCTP_LOG_CLOSING 4671 sctp_log_closing(inp, NULL, 7); 4672 #endif 4673 /* there is no asoc, really TSNH :-0 */ 4674 return (1); 4675 } 4676 if (stcb->asoc.alternate) { 4677 sctp_free_remote_addr(stcb->asoc.alternate); 4678 stcb->asoc.alternate = NULL; 4679 } 4680 /* TEMP CODE */ 4681 if (stcb->freed_from_where == 0) { 4682 /* Only record the first place free happened from */ 4683 stcb->freed_from_where = from_location; 4684 } 4685 /* TEMP CODE */ 4686 4687 asoc = &stcb->asoc; 4688 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4689 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4690 /* nothing around */ 4691 so = NULL; 4692 else 4693 so = inp->sctp_socket; 4694 4695 /* 4696 * We used timer based freeing if a reader or writer is in the way. 4697 * So we first check if we are actually being called from a timer, 4698 * if so we abort early if a reader or writer is still in the way. 4699 */ 4700 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) && 4701 (from_inpcbfree == SCTP_NORMAL_PROC)) { 4702 /* 4703 * is it the timer driving us? if so are the reader/writers 4704 * gone? 4705 */ 4706 if (stcb->asoc.refcnt) { 4707 /* nope, reader or writer in the way */ 4708 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4709 /* no asoc destroyed */ 4710 SCTP_TCB_UNLOCK(stcb); 4711 #ifdef SCTP_LOG_CLOSING 4712 sctp_log_closing(inp, stcb, 8); 4713 #endif 4714 return (0); 4715 } 4716 } 4717 /* now clean up any other timers */ 4718 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4719 asoc->dack_timer.self = NULL; 4720 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4721 /*- 4722 * For stream reset we don't blast this unless 4723 * it is a str-reset timer, it might be the 4724 * free-asoc timer which we DON'T want to 4725 * disturb. 4726 */ 4727 if (asoc->strreset_timer.type == SCTP_TIMER_TYPE_STRRESET) 4728 asoc->strreset_timer.self = NULL; 4729 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4730 asoc->asconf_timer.self = NULL; 4731 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4732 asoc->autoclose_timer.self = NULL; 4733 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4734 asoc->shut_guard_timer.self = NULL; 4735 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4736 asoc->delayed_event_timer.self = NULL; 4737 /* Mobility adaptation */ 4738 (void)SCTP_OS_TIMER_STOP(&asoc->delete_prim_timer.timer); 4739 asoc->delete_prim_timer.self = NULL; 4740 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4741 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4742 net->rxt_timer.self = NULL; 4743 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4744 net->pmtu_timer.self = NULL; 4745 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4746 net->hb_timer.self = NULL; 4747 } 4748 /* Now the read queue needs to be cleaned up (only once) */ 4749 if ((stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) == 0) { 4750 stcb->asoc.state |= SCTP_STATE_ABOUT_TO_BE_FREED; 4751 SCTP_INP_READ_LOCK(inp); 4752 TAILQ_FOREACH(sq, &inp->read_queue, next) { 4753 if (sq->stcb == stcb) { 4754 sq->do_not_ref_stcb = 1; 4755 sq->sinfo_cumtsn = stcb->asoc.cumulative_tsn; 4756 /* 4757 * If there is no end, there never will be 4758 * now. 4759 */ 4760 if (sq->end_added == 0) { 4761 /* Held for PD-API clear that. */ 4762 sq->pdapi_aborted = 1; 4763 sq->held_length = 0; 4764 if (sctp_stcb_is_feature_on(inp, stcb, SCTP_PCB_FLAGS_PDAPIEVNT) && (so != NULL)) { 4765 /* 4766 * Need to add a PD-API 4767 * aborted indication. 4768 * Setting the control_pdapi 4769 * assures that it will be 4770 * added right after this 4771 * msg. 4772 */ 4773 uint32_t strseq; 4774 4775 stcb->asoc.control_pdapi = sq; 4776 strseq = (sq->sinfo_stream << 16) | sq->sinfo_ssn; 4777 sctp_ulp_notify(SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION, 4778 stcb, 4779 SCTP_PARTIAL_DELIVERY_ABORTED, 4780 (void *)&strseq, 4781 SCTP_SO_LOCKED); 4782 stcb->asoc.control_pdapi = NULL; 4783 } 4784 } 4785 /* Add an end to wake them */ 4786 sq->end_added = 1; 4787 } 4788 } 4789 SCTP_INP_READ_UNLOCK(inp); 4790 if (stcb->block_entry) { 4791 SCTP_LTRACE_ERR_RET(inp, stcb, NULL, SCTP_FROM_SCTP_PCB, ECONNRESET); 4792 stcb->block_entry->error = ECONNRESET; 4793 stcb->block_entry = NULL; 4794 } 4795 } 4796 if ((stcb->asoc.refcnt) || (stcb->asoc.state & SCTP_STATE_IN_ACCEPT_QUEUE)) { 4797 /* 4798 * Someone holds a reference OR the socket is unaccepted 4799 * yet. 4800 */ 4801 if ((stcb->asoc.refcnt) || 4802 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4803 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) { 4804 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4805 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4806 } 4807 SCTP_TCB_UNLOCK(stcb); 4808 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4809 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4810 /* nothing around */ 4811 so = NULL; 4812 if (so) { 4813 /* Wake any reader/writers */ 4814 sctp_sorwakeup(inp, so); 4815 sctp_sowwakeup(inp, so); 4816 } 4817 #ifdef SCTP_LOG_CLOSING 4818 sctp_log_closing(inp, stcb, 9); 4819 #endif 4820 /* no asoc destroyed */ 4821 return (0); 4822 } 4823 #ifdef SCTP_LOG_CLOSING 4824 sctp_log_closing(inp, stcb, 10); 4825 #endif 4826 /* 4827 * When I reach here, no others want to kill the assoc yet.. and I 4828 * own the lock. Now its possible an abort comes in when I do the 4829 * lock exchange below to grab all the locks to do the final take 4830 * out. to prevent this we increment the count, which will start a 4831 * timer and blow out above thus assuring us that we hold exclusive 4832 * killing of the asoc. Note that after getting back the TCB lock we 4833 * will go ahead and increment the counter back up and stop any 4834 * timer a passing stranger may have started :-S 4835 */ 4836 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4837 atomic_add_int(&stcb->asoc.refcnt, 1); 4838 4839 SCTP_TCB_UNLOCK(stcb); 4840 SCTP_INP_INFO_WLOCK(); 4841 SCTP_INP_WLOCK(inp); 4842 SCTP_TCB_LOCK(stcb); 4843 } 4844 /* Double check the GONE flag */ 4845 if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) || 4846 (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) 4847 /* nothing around */ 4848 so = NULL; 4849 4850 if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) || 4851 (inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) { 4852 /* 4853 * For TCP type we need special handling when we are 4854 * connected. We also include the peel'ed off ones to. 4855 */ 4856 if (inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) { 4857 inp->sctp_flags &= ~SCTP_PCB_FLAGS_CONNECTED; 4858 inp->sctp_flags |= SCTP_PCB_FLAGS_WAS_CONNECTED; 4859 if (so) { 4860 SOCK_LOCK(so); 4861 if (so->so_rcv.sb_cc == 0) { 4862 so->so_state &= ~(SS_ISCONNECTING | 4863 SS_ISDISCONNECTING | 4864 SS_ISCONFIRMING | 4865 SS_ISCONNECTED); 4866 } 4867 socantrcvmore_locked(so); 4868 sctp_sowwakeup(inp, so); 4869 sctp_sorwakeup(inp, so); 4870 SCTP_SOWAKEUP(so); 4871 } 4872 } 4873 } 4874 /* 4875 * Make it invalid too, that way if its about to run it will abort 4876 * and return. 4877 */ 4878 /* re-increment the lock */ 4879 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4880 atomic_add_int(&stcb->asoc.refcnt, -1); 4881 } 4882 if (stcb->asoc.refcnt) { 4883 stcb->asoc.state &= ~SCTP_STATE_IN_ACCEPT_QUEUE; 4884 sctp_timer_start(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL); 4885 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4886 SCTP_INP_INFO_WUNLOCK(); 4887 SCTP_INP_WUNLOCK(inp); 4888 } 4889 SCTP_TCB_UNLOCK(stcb); 4890 return (0); 4891 } 4892 asoc->state = 0; 4893 if (inp->sctp_tcbhash) { 4894 LIST_REMOVE(stcb, sctp_tcbhash); 4895 } 4896 if (stcb->asoc.in_asocid_hash) { 4897 LIST_REMOVE(stcb, sctp_tcbasocidhash); 4898 } 4899 /* Now lets remove it from the list of ALL associations in the EP */ 4900 LIST_REMOVE(stcb, sctp_tcblist); 4901 if (from_inpcbfree == SCTP_NORMAL_PROC) { 4902 SCTP_INP_INCR_REF(inp); 4903 SCTP_INP_WUNLOCK(inp); 4904 } 4905 /* pull from vtag hash */ 4906 LIST_REMOVE(stcb, sctp_asocs); 4907 sctp_add_vtag_to_timewait(asoc->my_vtag, SCTP_BASE_SYSCTL(sctp_vtag_time_wait), 4908 inp->sctp_lport, stcb->rport); 4909 4910 /* 4911 * Now restop the timers to be sure this is paranoia at is finest! 4912 */ 4913 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4914 (void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer); 4915 (void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer); 4916 (void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer); 4917 (void)SCTP_OS_TIMER_STOP(&asoc->shut_guard_timer.timer); 4918 (void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer); 4919 (void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer); 4920 TAILQ_FOREACH(net, &asoc->nets, sctp_next) { 4921 (void)SCTP_OS_TIMER_STOP(&net->rxt_timer.timer); 4922 (void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer); 4923 (void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer); 4924 } 4925 4926 asoc->strreset_timer.type = SCTP_TIMER_TYPE_NONE; 4927 /* 4928 * The chunk lists and such SHOULD be empty but we check them just 4929 * in case. 4930 */ 4931 /* anything on the wheel needs to be removed */ 4932 for (i = 0; i < asoc->streamoutcnt; i++) { 4933 struct sctp_stream_out *outs; 4934 4935 outs = &asoc->strmout[i]; 4936 /* now clean up any chunks here */ 4937 TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) { 4938 TAILQ_REMOVE(&outs->outqueue, sp, next); 4939 sctp_free_spbufspace(stcb, asoc, sp); 4940 if (sp->data) { 4941 if (so) { 4942 /* Still an open socket - report */ 4943 sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb, 4944 0, (void *)sp, SCTP_SO_LOCKED); 4945 } 4946 if (sp->data) { 4947 sctp_m_freem(sp->data); 4948 sp->data = NULL; 4949 sp->tail_mbuf = NULL; 4950 sp->length = 0; 4951 } 4952 } 4953 if (sp->net) { 4954 sctp_free_remote_addr(sp->net); 4955 sp->net = NULL; 4956 } 4957 sctp_free_a_strmoq(stcb, sp, SCTP_SO_LOCKED); 4958 } 4959 } 4960 /* sa_ignore FREED_MEMORY */ 4961 TAILQ_FOREACH_SAFE(strrst, &asoc->resetHead, next_resp, nstrrst) { 4962 TAILQ_REMOVE(&asoc->resetHead, strrst, next_resp); 4963 SCTP_FREE(strrst, SCTP_M_STRESET); 4964 } 4965 TAILQ_FOREACH_SAFE(sq, &asoc->pending_reply_queue, next, nsq) { 4966 TAILQ_REMOVE(&asoc->pending_reply_queue, sq, next); 4967 if (sq->data) { 4968 sctp_m_freem(sq->data); 4969 sq->data = NULL; 4970 } 4971 sctp_free_remote_addr(sq->whoFrom); 4972 sq->whoFrom = NULL; 4973 sq->stcb = NULL; 4974 /* Free the ctl entry */ 4975 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), sq); 4976 SCTP_DECR_READQ_COUNT(); 4977 /* sa_ignore FREED_MEMORY */ 4978 } 4979 TAILQ_FOREACH_SAFE(chk, &asoc->free_chunks, sctp_next, nchk) { 4980 TAILQ_REMOVE(&asoc->free_chunks, chk, sctp_next); 4981 if (chk->data) { 4982 sctp_m_freem(chk->data); 4983 chk->data = NULL; 4984 } 4985 if (chk->holds_key_ref) 4986 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 4987 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 4988 SCTP_DECR_CHK_COUNT(); 4989 atomic_subtract_int(&SCTP_BASE_INFO(ipi_free_chunks), 1); 4990 asoc->free_chunk_cnt--; 4991 /* sa_ignore FREED_MEMORY */ 4992 } 4993 /* pending send queue SHOULD be empty */ 4994 TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) { 4995 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 4996 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 4997 #ifdef INVARIANTS 4998 } else { 4999 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5000 #endif 5001 } 5002 TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next); 5003 if (chk->data) { 5004 if (so) { 5005 /* Still a socket? */ 5006 sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 5007 0, chk, SCTP_SO_LOCKED); 5008 } 5009 if (chk->data) { 5010 sctp_m_freem(chk->data); 5011 chk->data = NULL; 5012 } 5013 } 5014 if (chk->holds_key_ref) 5015 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5016 if (chk->whoTo) { 5017 sctp_free_remote_addr(chk->whoTo); 5018 chk->whoTo = NULL; 5019 } 5020 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5021 SCTP_DECR_CHK_COUNT(); 5022 /* sa_ignore FREED_MEMORY */ 5023 } 5024 /* sent queue SHOULD be empty */ 5025 TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) { 5026 if (chk->sent != SCTP_DATAGRAM_NR_ACKED) { 5027 if (asoc->strmout[chk->rec.data.stream_number].chunks_on_queues > 0) { 5028 asoc->strmout[chk->rec.data.stream_number].chunks_on_queues--; 5029 #ifdef INVARIANTS 5030 } else { 5031 panic("No chunks on the queues for sid %u.", chk->rec.data.stream_number); 5032 #endif 5033 } 5034 } 5035 TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next); 5036 if (chk->data) { 5037 if (so) { 5038 /* Still a socket? */ 5039 sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 5040 0, chk, SCTP_SO_LOCKED); 5041 } 5042 if (chk->data) { 5043 sctp_m_freem(chk->data); 5044 chk->data = NULL; 5045 } 5046 } 5047 if (chk->holds_key_ref) 5048 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5049 sctp_free_remote_addr(chk->whoTo); 5050 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5051 SCTP_DECR_CHK_COUNT(); 5052 /* sa_ignore FREED_MEMORY */ 5053 } 5054 #ifdef INVARIANTS 5055 for (i = 0; i < stcb->asoc.streamoutcnt; i++) { 5056 if (stcb->asoc.strmout[i].chunks_on_queues > 0) { 5057 panic("%u chunks left for stream %u.", stcb->asoc.strmout[i].chunks_on_queues, i); 5058 } 5059 } 5060 #endif 5061 /* control queue MAY not be empty */ 5062 TAILQ_FOREACH_SAFE(chk, &asoc->control_send_queue, sctp_next, nchk) { 5063 TAILQ_REMOVE(&asoc->control_send_queue, chk, sctp_next); 5064 if (chk->data) { 5065 sctp_m_freem(chk->data); 5066 chk->data = NULL; 5067 } 5068 if (chk->holds_key_ref) 5069 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5070 sctp_free_remote_addr(chk->whoTo); 5071 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5072 SCTP_DECR_CHK_COUNT(); 5073 /* sa_ignore FREED_MEMORY */ 5074 } 5075 /* ASCONF queue MAY not be empty */ 5076 TAILQ_FOREACH_SAFE(chk, &asoc->asconf_send_queue, sctp_next, nchk) { 5077 TAILQ_REMOVE(&asoc->asconf_send_queue, chk, sctp_next); 5078 if (chk->data) { 5079 sctp_m_freem(chk->data); 5080 chk->data = NULL; 5081 } 5082 if (chk->holds_key_ref) 5083 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5084 sctp_free_remote_addr(chk->whoTo); 5085 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5086 SCTP_DECR_CHK_COUNT(); 5087 /* sa_ignore FREED_MEMORY */ 5088 } 5089 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 5090 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 5091 if (chk->data) { 5092 sctp_m_freem(chk->data); 5093 chk->data = NULL; 5094 } 5095 if (chk->holds_key_ref) 5096 sctp_auth_key_release(stcb, chk->auth_keyid, SCTP_SO_LOCKED); 5097 sctp_free_remote_addr(chk->whoTo); 5098 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_chunk), chk); 5099 SCTP_DECR_CHK_COUNT(); 5100 /* sa_ignore FREED_MEMORY */ 5101 } 5102 5103 if (asoc->mapping_array) { 5104 SCTP_FREE(asoc->mapping_array, SCTP_M_MAP); 5105 asoc->mapping_array = NULL; 5106 } 5107 if (asoc->nr_mapping_array) { 5108 SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP); 5109 asoc->nr_mapping_array = NULL; 5110 } 5111 /* the stream outs */ 5112 if (asoc->strmout) { 5113 SCTP_FREE(asoc->strmout, SCTP_M_STRMO); 5114 asoc->strmout = NULL; 5115 } 5116 asoc->strm_realoutsize = asoc->streamoutcnt = 0; 5117 if (asoc->strmin) { 5118 struct sctp_queued_to_read *ctl, *nctl; 5119 5120 for (i = 0; i < asoc->streamincnt; i++) { 5121 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[i].inqueue, next, nctl) { 5122 TAILQ_REMOVE(&asoc->strmin[i].inqueue, ctl, next); 5123 sctp_free_remote_addr(ctl->whoFrom); 5124 if (ctl->data) { 5125 sctp_m_freem(ctl->data); 5126 ctl->data = NULL; 5127 } 5128 /* 5129 * We don't free the address here since all 5130 * the net's were freed above. 5131 */ 5132 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 5133 SCTP_DECR_READQ_COUNT(); 5134 } 5135 } 5136 SCTP_FREE(asoc->strmin, SCTP_M_STRMI); 5137 asoc->strmin = NULL; 5138 } 5139 asoc->streamincnt = 0; 5140 TAILQ_FOREACH_SAFE(net, &asoc->nets, sctp_next, nnet) { 5141 #ifdef INVARIANTS 5142 if (SCTP_BASE_INFO(ipi_count_raddr) == 0) { 5143 panic("no net's left alloc'ed, or list points to itself"); 5144 } 5145 #endif 5146 TAILQ_REMOVE(&asoc->nets, net, sctp_next); 5147 sctp_free_remote_addr(net); 5148 } 5149 LIST_FOREACH_SAFE(laddr, &asoc->sctp_restricted_addrs, sctp_nxt_addr, naddr) { 5150 /* sa_ignore FREED_MEMORY */ 5151 sctp_remove_laddr(laddr); 5152 } 5153 5154 /* pending asconf (address) parameters */ 5155 TAILQ_FOREACH_SAFE(aparam, &asoc->asconf_queue, next, naparam) { 5156 /* sa_ignore FREED_MEMORY */ 5157 TAILQ_REMOVE(&asoc->asconf_queue, aparam, next); 5158 SCTP_FREE(aparam, SCTP_M_ASC_ADDR); 5159 } 5160 TAILQ_FOREACH_SAFE(aack, &asoc->asconf_ack_sent, next, naack) { 5161 /* sa_ignore FREED_MEMORY */ 5162 TAILQ_REMOVE(&asoc->asconf_ack_sent, aack, next); 5163 if (aack->data != NULL) { 5164 sctp_m_freem(aack->data); 5165 } 5166 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asconf_ack), aack); 5167 } 5168 /* clean up auth stuff */ 5169 if (asoc->local_hmacs) 5170 sctp_free_hmaclist(asoc->local_hmacs); 5171 if (asoc->peer_hmacs) 5172 sctp_free_hmaclist(asoc->peer_hmacs); 5173 5174 if (asoc->local_auth_chunks) 5175 sctp_free_chunklist(asoc->local_auth_chunks); 5176 if (asoc->peer_auth_chunks) 5177 sctp_free_chunklist(asoc->peer_auth_chunks); 5178 5179 sctp_free_authinfo(&asoc->authinfo); 5180 5181 LIST_FOREACH_SAFE(shared_key, &asoc->shared_keys, next, nshared_key) { 5182 LIST_REMOVE(shared_key, next); 5183 sctp_free_sharedkey(shared_key); 5184 /* sa_ignore FREED_MEMORY */ 5185 } 5186 5187 /* Insert new items here :> */ 5188 5189 /* Get rid of LOCK */ 5190 SCTP_TCB_UNLOCK(stcb); 5191 SCTP_TCB_LOCK_DESTROY(stcb); 5192 SCTP_TCB_SEND_LOCK_DESTROY(stcb); 5193 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5194 SCTP_INP_INFO_WUNLOCK(); 5195 SCTP_INP_RLOCK(inp); 5196 } 5197 #ifdef SCTP_TRACK_FREED_ASOCS 5198 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5199 /* now clean up the tasoc itself */ 5200 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5201 SCTP_DECR_ASOC_COUNT(); 5202 } else { 5203 LIST_INSERT_HEAD(&inp->sctp_asoc_free_list, stcb, sctp_tcblist); 5204 } 5205 #else 5206 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_asoc), stcb); 5207 SCTP_DECR_ASOC_COUNT(); 5208 #endif 5209 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5210 if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) { 5211 /* 5212 * If its NOT the inp_free calling us AND sctp_close 5213 * as been called, we call back... 5214 */ 5215 SCTP_INP_RUNLOCK(inp); 5216 /* 5217 * This will start the kill timer (if we are the 5218 * last one) since we hold an increment yet. But 5219 * this is the only safe way to do this since 5220 * otherwise if the socket closes at the same time 5221 * we are here we might collide in the cleanup. 5222 */ 5223 sctp_inpcb_free(inp, 5224 SCTP_FREE_SHOULD_USE_GRACEFUL_CLOSE, 5225 SCTP_CALLED_DIRECTLY_NOCMPSET); 5226 SCTP_INP_DECR_REF(inp); 5227 goto out_of; 5228 } else { 5229 /* The socket is still open. */ 5230 SCTP_INP_DECR_REF(inp); 5231 } 5232 } 5233 if (from_inpcbfree == SCTP_NORMAL_PROC) { 5234 SCTP_INP_RUNLOCK(inp); 5235 } 5236 out_of: 5237 /* destroyed the asoc */ 5238 #ifdef SCTP_LOG_CLOSING 5239 sctp_log_closing(inp, NULL, 11); 5240 #endif 5241 return (1); 5242 } 5243 5244 5245 5246 /* 5247 * determine if a destination is "reachable" based upon the addresses bound 5248 * to the current endpoint (e.g. only v4 or v6 currently bound) 5249 */ 5250 /* 5251 * FIX: if we allow assoc-level bindx(), then this needs to be fixed to use 5252 * assoc level v4/v6 flags, as the assoc *may* not have the same address 5253 * types bound as its endpoint 5254 */ 5255 int 5256 sctp_destination_is_reachable(struct sctp_tcb *stcb, struct sockaddr *destaddr) 5257 { 5258 struct sctp_inpcb *inp; 5259 int answer; 5260 5261 /* 5262 * No locks here, the TCB, in all cases is already locked and an 5263 * assoc is up. There is either a INP lock by the caller applied (in 5264 * asconf case when deleting an address) or NOT in the HB case, 5265 * however if HB then the INP increment is up and the INP will not 5266 * be removed (on top of the fact that we have a TCB lock). So we 5267 * only want to read the sctp_flags, which is either bound-all or 5268 * not.. no protection needed since once an assoc is up you can't be 5269 * changing your binding. 5270 */ 5271 inp = stcb->sctp_ep; 5272 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5273 /* if bound all, destination is not restricted */ 5274 /* 5275 * RRS: Question during lock work: Is this correct? If you 5276 * are bound-all you still might need to obey the V4--V6 5277 * flags??? IMO this bound-all stuff needs to be removed! 5278 */ 5279 return (1); 5280 } 5281 /* NOTE: all "scope" checks are done when local addresses are added */ 5282 switch (destaddr->sa_family) { 5283 #ifdef INET6 5284 case AF_INET6: 5285 answer = inp->ip_inp.inp.inp_vflag & INP_IPV6; 5286 break; 5287 #endif 5288 #ifdef INET 5289 case AF_INET: 5290 answer = inp->ip_inp.inp.inp_vflag & INP_IPV4; 5291 break; 5292 #endif 5293 default: 5294 /* invalid family, so it's unreachable */ 5295 answer = 0; 5296 break; 5297 } 5298 return (answer); 5299 } 5300 5301 /* 5302 * update the inp_vflags on an endpoint 5303 */ 5304 static void 5305 sctp_update_ep_vflag(struct sctp_inpcb *inp) 5306 { 5307 struct sctp_laddr *laddr; 5308 5309 /* first clear the flag */ 5310 inp->ip_inp.inp.inp_vflag = 0; 5311 /* set the flag based on addresses on the ep list */ 5312 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5313 if (laddr->ifa == NULL) { 5314 SCTPDBG(SCTP_DEBUG_PCB1, "%s: NULL ifa\n", 5315 __FUNCTION__); 5316 continue; 5317 } 5318 if (laddr->ifa->localifa_flags & SCTP_BEING_DELETED) { 5319 continue; 5320 } 5321 switch (laddr->ifa->address.sa.sa_family) { 5322 #ifdef INET6 5323 case AF_INET6: 5324 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5325 break; 5326 #endif 5327 #ifdef INET 5328 case AF_INET: 5329 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5330 break; 5331 #endif 5332 default: 5333 break; 5334 } 5335 } 5336 } 5337 5338 /* 5339 * Add the address to the endpoint local address list There is nothing to be 5340 * done if we are bound to all addresses 5341 */ 5342 void 5343 sctp_add_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa, uint32_t action) 5344 { 5345 struct sctp_laddr *laddr; 5346 int fnd, error = 0; 5347 5348 fnd = 0; 5349 5350 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5351 /* You are already bound to all. You have it already */ 5352 return; 5353 } 5354 #ifdef INET6 5355 if (ifa->address.sa.sa_family == AF_INET6) { 5356 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5357 /* Can't bind a non-useable addr. */ 5358 return; 5359 } 5360 } 5361 #endif 5362 /* first, is it already present? */ 5363 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5364 if (laddr->ifa == ifa) { 5365 fnd = 1; 5366 break; 5367 } 5368 } 5369 5370 if (fnd == 0) { 5371 /* Not in the ep list */ 5372 error = sctp_insert_laddr(&inp->sctp_addr_list, ifa, action); 5373 if (error != 0) 5374 return; 5375 inp->laddr_count++; 5376 /* update inp_vflag flags */ 5377 switch (ifa->address.sa.sa_family) { 5378 #ifdef INET6 5379 case AF_INET6: 5380 inp->ip_inp.inp.inp_vflag |= INP_IPV6; 5381 break; 5382 #endif 5383 #ifdef INET 5384 case AF_INET: 5385 inp->ip_inp.inp.inp_vflag |= INP_IPV4; 5386 break; 5387 #endif 5388 default: 5389 break; 5390 } 5391 } 5392 return; 5393 } 5394 5395 5396 /* 5397 * select a new (hopefully reachable) destination net (should only be used 5398 * when we deleted an ep addr that is the only usable source address to reach 5399 * the destination net) 5400 */ 5401 static void 5402 sctp_select_primary_destination(struct sctp_tcb *stcb) 5403 { 5404 struct sctp_nets *net; 5405 5406 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5407 /* for now, we'll just pick the first reachable one we find */ 5408 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) 5409 continue; 5410 if (sctp_destination_is_reachable(stcb, 5411 (struct sockaddr *)&net->ro._l_addr)) { 5412 /* found a reachable destination */ 5413 stcb->asoc.primary_destination = net; 5414 } 5415 } 5416 /* I can't there from here! ...we're gonna die shortly... */ 5417 } 5418 5419 5420 /* 5421 * Delete the address from the endpoint local address list There is nothing 5422 * to be done if we are bound to all addresses 5423 */ 5424 void 5425 sctp_del_local_addr_ep(struct sctp_inpcb *inp, struct sctp_ifa *ifa) 5426 { 5427 struct sctp_laddr *laddr; 5428 int fnd; 5429 5430 fnd = 0; 5431 if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) { 5432 /* You are already bound to all. You have it already */ 5433 return; 5434 } 5435 LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) { 5436 if (laddr->ifa == ifa) { 5437 fnd = 1; 5438 break; 5439 } 5440 } 5441 if (fnd && (inp->laddr_count < 2)) { 5442 /* can't delete unless there are at LEAST 2 addresses */ 5443 return; 5444 } 5445 if (fnd) { 5446 /* 5447 * clean up any use of this address go through our 5448 * associations and clear any last_used_address that match 5449 * this one for each assoc, see if a new primary_destination 5450 * is needed 5451 */ 5452 struct sctp_tcb *stcb; 5453 5454 /* clean up "next_addr_touse" */ 5455 if (inp->next_addr_touse == laddr) 5456 /* delete this address */ 5457 inp->next_addr_touse = NULL; 5458 5459 /* clean up "last_used_address" */ 5460 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 5461 struct sctp_nets *net; 5462 5463 SCTP_TCB_LOCK(stcb); 5464 if (stcb->asoc.last_used_address == laddr) 5465 /* delete this address */ 5466 stcb->asoc.last_used_address = NULL; 5467 /* 5468 * Now spin through all the nets and purge any ref 5469 * to laddr 5470 */ 5471 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 5472 if (net->ro._s_addr && 5473 (net->ro._s_addr->ifa == laddr->ifa)) { 5474 /* Yep, purge src address selected */ 5475 sctp_rtentry_t *rt; 5476 5477 /* delete this address if cached */ 5478 rt = net->ro.ro_rt; 5479 if (rt != NULL) { 5480 RTFREE(rt); 5481 net->ro.ro_rt = NULL; 5482 } 5483 sctp_free_ifa(net->ro._s_addr); 5484 net->ro._s_addr = NULL; 5485 net->src_addr_selected = 0; 5486 } 5487 } 5488 SCTP_TCB_UNLOCK(stcb); 5489 } /* for each tcb */ 5490 /* remove it from the ep list */ 5491 sctp_remove_laddr(laddr); 5492 inp->laddr_count--; 5493 /* update inp_vflag flags */ 5494 sctp_update_ep_vflag(inp); 5495 } 5496 return; 5497 } 5498 5499 /* 5500 * Add the address to the TCB local address restricted list. 5501 * This is a "pending" address list (eg. addresses waiting for an 5502 * ASCONF-ACK response) and cannot be used as a valid source address. 5503 */ 5504 void 5505 sctp_add_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5506 { 5507 struct sctp_laddr *laddr; 5508 struct sctpladdr *list; 5509 5510 /* 5511 * Assumes TCB is locked.. and possibly the INP. May need to 5512 * confirm/fix that if we need it and is not the case. 5513 */ 5514 list = &stcb->asoc.sctp_restricted_addrs; 5515 5516 #ifdef INET6 5517 if (ifa->address.sa.sa_family == AF_INET6) { 5518 if (ifa->localifa_flags & SCTP_ADDR_IFA_UNUSEABLE) { 5519 /* Can't bind a non-existent addr. */ 5520 return; 5521 } 5522 } 5523 #endif 5524 /* does the address already exist? */ 5525 LIST_FOREACH(laddr, list, sctp_nxt_addr) { 5526 if (laddr->ifa == ifa) { 5527 return; 5528 } 5529 } 5530 5531 /* add to the list */ 5532 (void)sctp_insert_laddr(list, ifa, 0); 5533 return; 5534 } 5535 5536 /* 5537 * insert an laddr entry with the given ifa for the desired list 5538 */ 5539 int 5540 sctp_insert_laddr(struct sctpladdr *list, struct sctp_ifa *ifa, uint32_t act) 5541 { 5542 struct sctp_laddr *laddr; 5543 5544 laddr = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr); 5545 if (laddr == NULL) { 5546 /* out of memory? */ 5547 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, EINVAL); 5548 return (EINVAL); 5549 } 5550 SCTP_INCR_LADDR_COUNT(); 5551 bzero(laddr, sizeof(*laddr)); 5552 (void)SCTP_GETTIME_TIMEVAL(&laddr->start_time); 5553 laddr->ifa = ifa; 5554 laddr->action = act; 5555 atomic_add_int(&ifa->refcount, 1); 5556 /* insert it */ 5557 LIST_INSERT_HEAD(list, laddr, sctp_nxt_addr); 5558 5559 return (0); 5560 } 5561 5562 /* 5563 * Remove an laddr entry from the local address list (on an assoc) 5564 */ 5565 void 5566 sctp_remove_laddr(struct sctp_laddr *laddr) 5567 { 5568 5569 /* remove from the list */ 5570 LIST_REMOVE(laddr, sctp_nxt_addr); 5571 sctp_free_ifa(laddr->ifa); 5572 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), laddr); 5573 SCTP_DECR_LADDR_COUNT(); 5574 } 5575 5576 /* 5577 * Remove a local address from the TCB local address restricted list 5578 */ 5579 void 5580 sctp_del_local_addr_restricted(struct sctp_tcb *stcb, struct sctp_ifa *ifa) 5581 { 5582 struct sctp_inpcb *inp; 5583 struct sctp_laddr *laddr; 5584 5585 /* 5586 * This is called by asconf work. It is assumed that a) The TCB is 5587 * locked and b) The INP is locked. This is true in as much as I can 5588 * trace through the entry asconf code where I did these locks. 5589 * Again, the ASCONF code is a bit different in that it does lock 5590 * the INP during its work often times. This must be since we don't 5591 * want other proc's looking up things while what they are looking 5592 * up is changing :-D 5593 */ 5594 5595 inp = stcb->sctp_ep; 5596 /* if subset bound and don't allow ASCONF's, can't delete last */ 5597 if (((inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) == 0) && 5598 sctp_is_feature_off(inp, SCTP_PCB_FLAGS_DO_ASCONF)) { 5599 if (stcb->sctp_ep->laddr_count < 2) { 5600 /* can't delete last address */ 5601 return; 5602 } 5603 } 5604 LIST_FOREACH(laddr, &stcb->asoc.sctp_restricted_addrs, sctp_nxt_addr) { 5605 /* remove the address if it exists */ 5606 if (laddr->ifa == NULL) 5607 continue; 5608 if (laddr->ifa == ifa) { 5609 sctp_remove_laddr(laddr); 5610 return; 5611 } 5612 } 5613 5614 /* address not found! */ 5615 return; 5616 } 5617 5618 /* 5619 * Temporarily remove for __APPLE__ until we use the Tiger equivalents 5620 */ 5621 /* sysctl */ 5622 static int sctp_max_number_of_assoc = SCTP_MAX_NUM_OF_ASOC; 5623 static int sctp_scale_up_for_address = SCTP_SCALE_FOR_ADDR; 5624 5625 5626 5627 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5628 struct sctp_mcore_ctrl *sctp_mcore_workers = NULL; 5629 int *sctp_cpuarry = NULL; 5630 void 5631 sctp_queue_to_mcore(struct mbuf *m, int off, int cpu_to_use) 5632 { 5633 /* Queue a packet to a processor for the specified core */ 5634 struct sctp_mcore_queue *qent; 5635 struct sctp_mcore_ctrl *wkq; 5636 int need_wake = 0; 5637 5638 if (sctp_mcore_workers == NULL) { 5639 /* Something went way bad during setup */ 5640 sctp_input_with_port(m, off, 0); 5641 return; 5642 } 5643 SCTP_MALLOC(qent, struct sctp_mcore_queue *, 5644 (sizeof(struct sctp_mcore_queue)), 5645 SCTP_M_MCORE); 5646 if (qent == NULL) { 5647 /* This is trouble */ 5648 sctp_input_with_port(m, off, 0); 5649 return; 5650 } 5651 qent->vn = curvnet; 5652 qent->m = m; 5653 qent->off = off; 5654 qent->v6 = 0; 5655 wkq = &sctp_mcore_workers[cpu_to_use]; 5656 SCTP_MCORE_QLOCK(wkq); 5657 5658 TAILQ_INSERT_TAIL(&wkq->que, qent, next); 5659 if (wkq->running == 0) { 5660 need_wake = 1; 5661 } 5662 SCTP_MCORE_QUNLOCK(wkq); 5663 if (need_wake) { 5664 wakeup(&wkq->running); 5665 } 5666 } 5667 5668 static void 5669 sctp_mcore_thread(void *arg) 5670 { 5671 5672 struct sctp_mcore_ctrl *wkq; 5673 struct sctp_mcore_queue *qent; 5674 5675 wkq = (struct sctp_mcore_ctrl *)arg; 5676 struct mbuf *m; 5677 int off, v6; 5678 5679 /* Wait for first tickle */ 5680 SCTP_MCORE_LOCK(wkq); 5681 wkq->running = 0; 5682 msleep(&wkq->running, 5683 &wkq->core_mtx, 5684 0, "wait for pkt", 0); 5685 SCTP_MCORE_UNLOCK(wkq); 5686 5687 /* Bind to our cpu */ 5688 thread_lock(curthread); 5689 sched_bind(curthread, wkq->cpuid); 5690 thread_unlock(curthread); 5691 5692 /* Now lets start working */ 5693 SCTP_MCORE_LOCK(wkq); 5694 /* Now grab lock and go */ 5695 for (;;) { 5696 SCTP_MCORE_QLOCK(wkq); 5697 skip_sleep: 5698 wkq->running = 1; 5699 qent = TAILQ_FIRST(&wkq->que); 5700 if (qent) { 5701 TAILQ_REMOVE(&wkq->que, qent, next); 5702 SCTP_MCORE_QUNLOCK(wkq); 5703 CURVNET_SET(qent->vn); 5704 m = qent->m; 5705 off = qent->off; 5706 v6 = qent->v6; 5707 SCTP_FREE(qent, SCTP_M_MCORE); 5708 if (v6 == 0) { 5709 sctp_input_with_port(m, off, 0); 5710 } else { 5711 SCTP_PRINTF("V6 not yet supported\n"); 5712 sctp_m_freem(m); 5713 } 5714 CURVNET_RESTORE(); 5715 SCTP_MCORE_QLOCK(wkq); 5716 } 5717 wkq->running = 0; 5718 if (!TAILQ_EMPTY(&wkq->que)) { 5719 goto skip_sleep; 5720 } 5721 SCTP_MCORE_QUNLOCK(wkq); 5722 msleep(&wkq->running, 5723 &wkq->core_mtx, 5724 0, "wait for pkt", 0); 5725 } 5726 } 5727 5728 static void 5729 sctp_startup_mcore_threads(void) 5730 { 5731 int i, cpu; 5732 5733 if (mp_ncpus == 1) 5734 return; 5735 5736 if (sctp_mcore_workers != NULL) { 5737 /* 5738 * Already been here in some previous vnet? 5739 */ 5740 return; 5741 } 5742 SCTP_MALLOC(sctp_mcore_workers, struct sctp_mcore_ctrl *, 5743 ((mp_maxid + 1) * sizeof(struct sctp_mcore_ctrl)), 5744 SCTP_M_MCORE); 5745 if (sctp_mcore_workers == NULL) { 5746 /* TSNH I hope */ 5747 return; 5748 } 5749 memset(sctp_mcore_workers, 0, ((mp_maxid + 1) * 5750 sizeof(struct sctp_mcore_ctrl))); 5751 /* Init the structures */ 5752 for (i = 0; i <= mp_maxid; i++) { 5753 TAILQ_INIT(&sctp_mcore_workers[i].que); 5754 SCTP_MCORE_LOCK_INIT(&sctp_mcore_workers[i]); 5755 SCTP_MCORE_QLOCK_INIT(&sctp_mcore_workers[i]); 5756 sctp_mcore_workers[i].cpuid = i; 5757 } 5758 if (sctp_cpuarry == NULL) { 5759 SCTP_MALLOC(sctp_cpuarry, int *, 5760 (mp_ncpus * sizeof(int)), 5761 SCTP_M_MCORE); 5762 i = 0; 5763 CPU_FOREACH(cpu) { 5764 sctp_cpuarry[i] = cpu; 5765 i++; 5766 } 5767 } 5768 /* Now start them all */ 5769 CPU_FOREACH(cpu) { 5770 (void)kproc_create(sctp_mcore_thread, 5771 (void *)&sctp_mcore_workers[cpu], 5772 &sctp_mcore_workers[cpu].thread_proc, 5773 RFPROC, 5774 SCTP_KTHREAD_PAGES, 5775 SCTP_MCORE_NAME); 5776 5777 } 5778 } 5779 5780 #endif 5781 5782 void 5783 sctp_pcb_init() 5784 { 5785 /* 5786 * SCTP initialization for the PCB structures should be called by 5787 * the sctp_init() funciton. 5788 */ 5789 int i; 5790 struct timeval tv; 5791 5792 if (SCTP_BASE_VAR(sctp_pcb_initialized) != 0) { 5793 /* error I was called twice */ 5794 return; 5795 } 5796 SCTP_BASE_VAR(sctp_pcb_initialized) = 1; 5797 5798 #if defined(SCTP_LOCAL_TRACE_BUF) 5799 bzero(&SCTP_BASE_SYSCTL(sctp_log), sizeof(struct sctp_log)); 5800 #endif 5801 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5802 SCTP_MALLOC(SCTP_BASE_STATS, struct sctpstat *, 5803 ((mp_maxid + 1) * sizeof(struct sctpstat)), 5804 SCTP_M_MCORE); 5805 #endif 5806 (void)SCTP_GETTIME_TIMEVAL(&tv); 5807 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 5808 bzero(SCTP_BASE_STATS, (sizeof(struct sctpstat) * (mp_maxid + 1))); 5809 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_sec = (uint32_t) tv.tv_sec; 5810 SCTP_BASE_STATS[PCPU_GET(cpuid)].sctps_discontinuitytime.tv_usec = (uint32_t) tv.tv_usec; 5811 #else 5812 bzero(&SCTP_BASE_STATS, sizeof(struct sctpstat)); 5813 SCTP_BASE_STAT(sctps_discontinuitytime).tv_sec = (uint32_t) tv.tv_sec; 5814 SCTP_BASE_STAT(sctps_discontinuitytime).tv_usec = (uint32_t) tv.tv_usec; 5815 #endif 5816 /* init the empty list of (All) Endpoints */ 5817 LIST_INIT(&SCTP_BASE_INFO(listhead)); 5818 5819 5820 /* init the hash table of endpoints */ 5821 TUNABLE_INT_FETCH("net.inet.sctp.tcbhashsize", &SCTP_BASE_SYSCTL(sctp_hashtblsize)); 5822 TUNABLE_INT_FETCH("net.inet.sctp.pcbhashsize", &SCTP_BASE_SYSCTL(sctp_pcbtblsize)); 5823 TUNABLE_INT_FETCH("net.inet.sctp.chunkscale", &SCTP_BASE_SYSCTL(sctp_chunkscale)); 5824 SCTP_BASE_INFO(sctp_asochash) = SCTP_HASH_INIT((SCTP_BASE_SYSCTL(sctp_hashtblsize) * 31), 5825 &SCTP_BASE_INFO(hashasocmark)); 5826 SCTP_BASE_INFO(sctp_ephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5827 &SCTP_BASE_INFO(hashmark)); 5828 SCTP_BASE_INFO(sctp_tcpephash) = SCTP_HASH_INIT(SCTP_BASE_SYSCTL(sctp_hashtblsize), 5829 &SCTP_BASE_INFO(hashtcpmark)); 5830 SCTP_BASE_INFO(hashtblsize) = SCTP_BASE_SYSCTL(sctp_hashtblsize); 5831 5832 5833 SCTP_BASE_INFO(sctp_vrfhash) = SCTP_HASH_INIT(SCTP_SIZE_OF_VRF_HASH, 5834 &SCTP_BASE_INFO(hashvrfmark)); 5835 5836 SCTP_BASE_INFO(vrf_ifn_hash) = SCTP_HASH_INIT(SCTP_VRF_IFN_HASH_SIZE, 5837 &SCTP_BASE_INFO(vrf_ifn_hashmark)); 5838 /* init the zones */ 5839 /* 5840 * FIX ME: Should check for NULL returns, but if it does fail we are 5841 * doomed to panic anyways... add later maybe. 5842 */ 5843 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_ep), "sctp_ep", 5844 sizeof(struct sctp_inpcb), maxsockets); 5845 5846 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asoc), "sctp_asoc", 5847 sizeof(struct sctp_tcb), sctp_max_number_of_assoc); 5848 5849 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_laddr), "sctp_laddr", 5850 sizeof(struct sctp_laddr), 5851 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5852 5853 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_net), "sctp_raddr", 5854 sizeof(struct sctp_nets), 5855 (sctp_max_number_of_assoc * sctp_scale_up_for_address)); 5856 5857 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_chunk), "sctp_chunk", 5858 sizeof(struct sctp_tmit_chunk), 5859 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5860 5861 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_readq), "sctp_readq", 5862 sizeof(struct sctp_queued_to_read), 5863 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5864 5865 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_strmoq), "sctp_stream_msg_out", 5866 sizeof(struct sctp_stream_queue_pending), 5867 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5868 5869 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf), "sctp_asconf", 5870 sizeof(struct sctp_asconf), 5871 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5872 5873 SCTP_ZONE_INIT(SCTP_BASE_INFO(ipi_zone_asconf_ack), "sctp_asconf_ack", 5874 sizeof(struct sctp_asconf_ack), 5875 (sctp_max_number_of_assoc * SCTP_BASE_SYSCTL(sctp_chunkscale))); 5876 5877 5878 /* Master Lock INIT for info structure */ 5879 SCTP_INP_INFO_LOCK_INIT(); 5880 SCTP_STATLOG_INIT_LOCK(); 5881 5882 SCTP_IPI_COUNT_INIT(); 5883 SCTP_IPI_ADDR_INIT(); 5884 #ifdef SCTP_PACKET_LOGGING 5885 SCTP_IP_PKTLOG_INIT(); 5886 #endif 5887 LIST_INIT(&SCTP_BASE_INFO(addr_wq)); 5888 5889 SCTP_WQ_ADDR_INIT(); 5890 /* not sure if we need all the counts */ 5891 SCTP_BASE_INFO(ipi_count_ep) = 0; 5892 /* assoc/tcb zone info */ 5893 SCTP_BASE_INFO(ipi_count_asoc) = 0; 5894 /* local addrlist zone info */ 5895 SCTP_BASE_INFO(ipi_count_laddr) = 0; 5896 /* remote addrlist zone info */ 5897 SCTP_BASE_INFO(ipi_count_raddr) = 0; 5898 /* chunk info */ 5899 SCTP_BASE_INFO(ipi_count_chunk) = 0; 5900 5901 /* socket queue zone info */ 5902 SCTP_BASE_INFO(ipi_count_readq) = 0; 5903 5904 /* stream out queue cont */ 5905 SCTP_BASE_INFO(ipi_count_strmoq) = 0; 5906 5907 SCTP_BASE_INFO(ipi_free_strmoq) = 0; 5908 SCTP_BASE_INFO(ipi_free_chunks) = 0; 5909 5910 SCTP_OS_TIMER_INIT(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5911 5912 /* Init the TIMEWAIT list */ 5913 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 5914 LIST_INIT(&SCTP_BASE_INFO(vtag_timewait)[i]); 5915 } 5916 sctp_startup_iterator(); 5917 5918 #if defined(__FreeBSD__) && defined(SCTP_MCORE_INPUT) && defined(SMP) 5919 sctp_startup_mcore_threads(); 5920 #endif 5921 5922 /* 5923 * INIT the default VRF which for BSD is the only one, other O/S's 5924 * may have more. But initially they must start with one and then 5925 * add the VRF's as addresses are added. 5926 */ 5927 sctp_init_vrf_list(SCTP_DEFAULT_VRF); 5928 } 5929 5930 /* 5931 * Assumes that the SCTP_BASE_INFO() lock is NOT held. 5932 */ 5933 void 5934 sctp_pcb_finish(void) 5935 { 5936 struct sctp_vrflist *vrf_bucket; 5937 struct sctp_vrf *vrf, *nvrf; 5938 struct sctp_ifn *ifn, *nifn; 5939 struct sctp_ifa *ifa, *nifa; 5940 struct sctpvtaghead *chain; 5941 struct sctp_tagblock *twait_block, *prev_twait_block; 5942 struct sctp_laddr *wi, *nwi; 5943 int i; 5944 struct sctp_iterator *it, *nit; 5945 5946 /* 5947 * In FreeBSD the iterator thread never exits but we do clean up. 5948 * The only way FreeBSD reaches here is if we have VRF's but we 5949 * still add the ifdef to make it compile on old versions. 5950 */ 5951 SCTP_IPI_ITERATOR_WQ_LOCK(); 5952 TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) { 5953 if (it->vn != curvnet) { 5954 continue; 5955 } 5956 TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 5957 if (it->function_atend != NULL) { 5958 (*it->function_atend) (it->pointer, it->val); 5959 } 5960 SCTP_FREE(it, SCTP_M_ITER); 5961 } 5962 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 5963 SCTP_ITERATOR_LOCK(); 5964 if ((sctp_it_ctl.cur_it) && 5965 (sctp_it_ctl.cur_it->vn == curvnet)) { 5966 sctp_it_ctl.iterator_flags |= SCTP_ITERATOR_STOP_CUR_IT; 5967 } 5968 SCTP_ITERATOR_UNLOCK(); 5969 SCTP_OS_TIMER_STOP(&SCTP_BASE_INFO(addr_wq_timer.timer)); 5970 SCTP_WQ_ADDR_LOCK(); 5971 LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) { 5972 LIST_REMOVE(wi, sctp_nxt_addr); 5973 SCTP_DECR_LADDR_COUNT(); 5974 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_laddr), wi); 5975 } 5976 SCTP_WQ_ADDR_UNLOCK(); 5977 5978 /* 5979 * free the vrf/ifn/ifa lists and hashes (be sure address monitor is 5980 * destroyed first). 5981 */ 5982 vrf_bucket = &SCTP_BASE_INFO(sctp_vrfhash)[(SCTP_DEFAULT_VRFID & SCTP_BASE_INFO(hashvrfmark))]; 5983 LIST_FOREACH_SAFE(vrf, vrf_bucket, next_vrf, nvrf) { 5984 LIST_FOREACH_SAFE(ifn, &vrf->ifnlist, next_ifn, nifn) { 5985 LIST_FOREACH_SAFE(ifa, &ifn->ifalist, next_ifa, nifa) { 5986 /* free the ifa */ 5987 LIST_REMOVE(ifa, next_bucket); 5988 LIST_REMOVE(ifa, next_ifa); 5989 SCTP_FREE(ifa, SCTP_M_IFA); 5990 } 5991 /* free the ifn */ 5992 LIST_REMOVE(ifn, next_bucket); 5993 LIST_REMOVE(ifn, next_ifn); 5994 SCTP_FREE(ifn, SCTP_M_IFN); 5995 } 5996 SCTP_HASH_FREE(vrf->vrf_addr_hash, vrf->vrf_addr_hashmark); 5997 /* free the vrf */ 5998 LIST_REMOVE(vrf, next_vrf); 5999 SCTP_FREE(vrf, SCTP_M_VRF); 6000 } 6001 /* free the vrf hashes */ 6002 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_vrfhash), SCTP_BASE_INFO(hashvrfmark)); 6003 SCTP_HASH_FREE(SCTP_BASE_INFO(vrf_ifn_hash), SCTP_BASE_INFO(vrf_ifn_hashmark)); 6004 6005 /* 6006 * free the TIMEWAIT list elements malloc'd in the function 6007 * sctp_add_vtag_to_timewait()... 6008 */ 6009 for (i = 0; i < SCTP_STACK_VTAG_HASH_SIZE; i++) { 6010 chain = &SCTP_BASE_INFO(vtag_timewait)[i]; 6011 if (!LIST_EMPTY(chain)) { 6012 prev_twait_block = NULL; 6013 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6014 if (prev_twait_block) { 6015 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6016 } 6017 prev_twait_block = twait_block; 6018 } 6019 SCTP_FREE(prev_twait_block, SCTP_M_TIMW); 6020 } 6021 } 6022 6023 /* free the locks and mutexes */ 6024 #ifdef SCTP_PACKET_LOGGING 6025 SCTP_IP_PKTLOG_DESTROY(); 6026 #endif 6027 SCTP_IPI_ADDR_DESTROY(); 6028 SCTP_STATLOG_DESTROY(); 6029 SCTP_INP_INFO_LOCK_DESTROY(); 6030 6031 SCTP_WQ_ADDR_DESTROY(); 6032 6033 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_ep)); 6034 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asoc)); 6035 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_laddr)); 6036 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_net)); 6037 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_chunk)); 6038 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_readq)); 6039 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_strmoq)); 6040 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf)); 6041 SCTP_ZONE_DESTROY(SCTP_BASE_INFO(ipi_zone_asconf_ack)); 6042 /* Get rid of other stuff to */ 6043 if (SCTP_BASE_INFO(sctp_asochash) != NULL) 6044 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_asochash), SCTP_BASE_INFO(hashasocmark)); 6045 if (SCTP_BASE_INFO(sctp_ephash) != NULL) 6046 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_ephash), SCTP_BASE_INFO(hashmark)); 6047 if (SCTP_BASE_INFO(sctp_tcpephash) != NULL) 6048 SCTP_HASH_FREE(SCTP_BASE_INFO(sctp_tcpephash), SCTP_BASE_INFO(hashtcpmark)); 6049 #if defined(__FreeBSD__) && defined(SMP) && defined(SCTP_USE_PERCPU_STAT) 6050 SCTP_FREE(SCTP_BASE_STATS, SCTP_M_MCORE); 6051 #endif 6052 } 6053 6054 6055 int 6056 sctp_load_addresses_from_init(struct sctp_tcb *stcb, struct mbuf *m, 6057 int offset, int limit, 6058 struct sockaddr *src, struct sockaddr *dst, 6059 struct sockaddr *altsa) 6060 { 6061 /* 6062 * grub through the INIT pulling addresses and loading them to the 6063 * nets structure in the asoc. The from address in the mbuf should 6064 * also be loaded (if it is not already). This routine can be called 6065 * with either INIT or INIT-ACK's as long as the m points to the IP 6066 * packet and the offset points to the beginning of the parameters. 6067 */ 6068 struct sctp_inpcb *inp; 6069 struct sctp_nets *net, *nnet, *net_tmp; 6070 struct sctp_paramhdr *phdr, parm_buf; 6071 struct sctp_tcb *stcb_tmp; 6072 uint16_t ptype, plen; 6073 struct sockaddr *sa; 6074 uint8_t random_store[SCTP_PARAM_BUFFER_SIZE]; 6075 struct sctp_auth_random *p_random = NULL; 6076 uint16_t random_len = 0; 6077 uint8_t hmacs_store[SCTP_PARAM_BUFFER_SIZE]; 6078 struct sctp_auth_hmac_algo *hmacs = NULL; 6079 uint16_t hmacs_len = 0; 6080 uint8_t saw_asconf = 0; 6081 uint8_t saw_asconf_ack = 0; 6082 uint8_t chunks_store[SCTP_PARAM_BUFFER_SIZE]; 6083 struct sctp_auth_chunk_list *chunks = NULL; 6084 uint16_t num_chunks = 0; 6085 sctp_key_t *new_key; 6086 uint32_t keylen; 6087 int got_random = 0, got_hmacs = 0, got_chklist = 0; 6088 uint8_t ecn_supported; 6089 uint8_t prsctp_supported; 6090 uint8_t reconfig_supported; 6091 uint8_t nrsack_supported; 6092 uint8_t pktdrop_supported; 6093 6094 #ifdef INET 6095 struct sockaddr_in sin; 6096 6097 #endif 6098 #ifdef INET6 6099 struct sockaddr_in6 sin6; 6100 6101 #endif 6102 6103 /* First get the destination address setup too. */ 6104 #ifdef INET 6105 memset(&sin, 0, sizeof(sin)); 6106 sin.sin_family = AF_INET; 6107 sin.sin_len = sizeof(sin); 6108 sin.sin_port = stcb->rport; 6109 #endif 6110 #ifdef INET6 6111 memset(&sin6, 0, sizeof(sin6)); 6112 sin6.sin6_family = AF_INET6; 6113 sin6.sin6_len = sizeof(struct sockaddr_in6); 6114 sin6.sin6_port = stcb->rport; 6115 #endif 6116 if (altsa) { 6117 sa = altsa; 6118 } else { 6119 sa = src; 6120 } 6121 ecn_supported = 0; 6122 prsctp_supported = 0; 6123 reconfig_supported = 0; 6124 nrsack_supported = 0; 6125 pktdrop_supported = 0; 6126 TAILQ_FOREACH(net, &stcb->asoc.nets, sctp_next) { 6127 /* mark all addresses that we have currently on the list */ 6128 net->dest_state |= SCTP_ADDR_NOT_IN_ASSOC; 6129 } 6130 /* does the source address already exist? if so skip it */ 6131 inp = stcb->sctp_ep; 6132 atomic_add_int(&stcb->asoc.refcnt, 1); 6133 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net_tmp, dst, stcb); 6134 atomic_add_int(&stcb->asoc.refcnt, -1); 6135 6136 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || inp == NULL) { 6137 /* we must add the source address */ 6138 /* no scope set here since we have a tcb already. */ 6139 switch (sa->sa_family) { 6140 #ifdef INET 6141 case AF_INET: 6142 if (stcb->asoc.scope.ipv4_addr_legal) { 6143 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_2)) { 6144 return (-1); 6145 } 6146 } 6147 break; 6148 #endif 6149 #ifdef INET6 6150 case AF_INET6: 6151 if (stcb->asoc.scope.ipv6_addr_legal) { 6152 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_3)) { 6153 return (-2); 6154 } 6155 } 6156 break; 6157 #endif 6158 default: 6159 break; 6160 } 6161 } else { 6162 if (net_tmp != NULL && stcb_tmp == stcb) { 6163 net_tmp->dest_state &= ~SCTP_ADDR_NOT_IN_ASSOC; 6164 } else if (stcb_tmp != stcb) { 6165 /* It belongs to another association? */ 6166 if (stcb_tmp) 6167 SCTP_TCB_UNLOCK(stcb_tmp); 6168 return (-3); 6169 } 6170 } 6171 if (stcb->asoc.state == 0) { 6172 /* the assoc was freed? */ 6173 return (-4); 6174 } 6175 /* 6176 * peer must explicitly turn this on. This may have been initialized 6177 * to be "on" in order to allow local addr changes while INIT's are 6178 * in flight. 6179 */ 6180 stcb->asoc.peer_supports_asconf = 0; 6181 /* now we must go through each of the params. */ 6182 phdr = sctp_get_next_param(m, offset, &parm_buf, sizeof(parm_buf)); 6183 while (phdr) { 6184 ptype = ntohs(phdr->param_type); 6185 plen = ntohs(phdr->param_length); 6186 /* 6187 * SCTP_PRINTF("ptype => %0x, plen => %d\n", 6188 * (uint32_t)ptype, (int)plen); 6189 */ 6190 if (offset + plen > limit) { 6191 break; 6192 } 6193 if (plen == 0) { 6194 break; 6195 } 6196 #ifdef INET 6197 if (ptype == SCTP_IPV4_ADDRESS) { 6198 if (stcb->asoc.scope.ipv4_addr_legal) { 6199 struct sctp_ipv4addr_param *p4, p4_buf; 6200 6201 /* ok get the v4 address and check/add */ 6202 phdr = sctp_get_next_param(m, offset, 6203 (struct sctp_paramhdr *)&p4_buf, 6204 sizeof(p4_buf)); 6205 if (plen != sizeof(struct sctp_ipv4addr_param) || 6206 phdr == NULL) { 6207 return (-5); 6208 } 6209 p4 = (struct sctp_ipv4addr_param *)phdr; 6210 sin.sin_addr.s_addr = p4->addr; 6211 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 6212 /* Skip multi-cast addresses */ 6213 goto next_param; 6214 } 6215 if ((sin.sin_addr.s_addr == INADDR_BROADCAST) || 6216 (sin.sin_addr.s_addr == INADDR_ANY)) { 6217 goto next_param; 6218 } 6219 sa = (struct sockaddr *)&sin; 6220 inp = stcb->sctp_ep; 6221 atomic_add_int(&stcb->asoc.refcnt, 1); 6222 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6223 dst, stcb); 6224 atomic_add_int(&stcb->asoc.refcnt, -1); 6225 6226 if ((stcb_tmp == NULL && inp == stcb->sctp_ep) || 6227 inp == NULL) { 6228 /* we must add the source address */ 6229 /* 6230 * no scope set since we have a tcb 6231 * already 6232 */ 6233 6234 /* 6235 * we must validate the state again 6236 * here 6237 */ 6238 add_it_now: 6239 if (stcb->asoc.state == 0) { 6240 /* the assoc was freed? */ 6241 return (-7); 6242 } 6243 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_4)) { 6244 return (-8); 6245 } 6246 } else if (stcb_tmp == stcb) { 6247 if (stcb->asoc.state == 0) { 6248 /* the assoc was freed? */ 6249 return (-10); 6250 } 6251 if (net != NULL) { 6252 /* clear flag */ 6253 net->dest_state &= 6254 ~SCTP_ADDR_NOT_IN_ASSOC; 6255 } 6256 } else { 6257 /* 6258 * strange, address is in another 6259 * assoc? straighten out locks. 6260 */ 6261 if (stcb_tmp) { 6262 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6263 /* 6264 * in setup state we 6265 * abort this guy 6266 */ 6267 sctp_abort_an_association(stcb_tmp->sctp_ep, 6268 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6269 goto add_it_now; 6270 } 6271 SCTP_TCB_UNLOCK(stcb_tmp); 6272 } 6273 if (stcb->asoc.state == 0) { 6274 /* the assoc was freed? */ 6275 return (-12); 6276 } 6277 return (-13); 6278 } 6279 } 6280 } else 6281 #endif 6282 #ifdef INET6 6283 if (ptype == SCTP_IPV6_ADDRESS) { 6284 if (stcb->asoc.scope.ipv6_addr_legal) { 6285 /* ok get the v6 address and check/add */ 6286 struct sctp_ipv6addr_param *p6, p6_buf; 6287 6288 phdr = sctp_get_next_param(m, offset, 6289 (struct sctp_paramhdr *)&p6_buf, 6290 sizeof(p6_buf)); 6291 if (plen != sizeof(struct sctp_ipv6addr_param) || 6292 phdr == NULL) { 6293 return (-14); 6294 } 6295 p6 = (struct sctp_ipv6addr_param *)phdr; 6296 memcpy((caddr_t)&sin6.sin6_addr, p6->addr, 6297 sizeof(p6->addr)); 6298 if (IN6_IS_ADDR_MULTICAST(&sin6.sin6_addr)) { 6299 /* Skip multi-cast addresses */ 6300 goto next_param; 6301 } 6302 if (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr)) { 6303 /* 6304 * Link local make no sense without 6305 * scope 6306 */ 6307 goto next_param; 6308 } 6309 sa = (struct sockaddr *)&sin6; 6310 inp = stcb->sctp_ep; 6311 atomic_add_int(&stcb->asoc.refcnt, 1); 6312 stcb_tmp = sctp_findassociation_ep_addr(&inp, sa, &net, 6313 dst, stcb); 6314 atomic_add_int(&stcb->asoc.refcnt, -1); 6315 if (stcb_tmp == NULL && 6316 (inp == stcb->sctp_ep || inp == NULL)) { 6317 /* 6318 * we must validate the state again 6319 * here 6320 */ 6321 add_it_now6: 6322 if (stcb->asoc.state == 0) { 6323 /* the assoc was freed? */ 6324 return (-16); 6325 } 6326 /* 6327 * we must add the address, no scope 6328 * set 6329 */ 6330 if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_LOAD_ADDR_5)) { 6331 return (-17); 6332 } 6333 } else if (stcb_tmp == stcb) { 6334 /* 6335 * we must validate the state again 6336 * here 6337 */ 6338 if (stcb->asoc.state == 0) { 6339 /* the assoc was freed? */ 6340 return (-19); 6341 } 6342 if (net != NULL) { 6343 /* clear flag */ 6344 net->dest_state &= 6345 ~SCTP_ADDR_NOT_IN_ASSOC; 6346 } 6347 } else { 6348 /* 6349 * strange, address is in another 6350 * assoc? straighten out locks. 6351 */ 6352 if (stcb_tmp) 6353 if (SCTP_GET_STATE(&stcb_tmp->asoc) & SCTP_STATE_COOKIE_WAIT) { 6354 /* 6355 * in setup state we 6356 * abort this guy 6357 */ 6358 sctp_abort_an_association(stcb_tmp->sctp_ep, 6359 stcb_tmp, NULL, SCTP_SO_NOT_LOCKED); 6360 goto add_it_now6; 6361 } 6362 SCTP_TCB_UNLOCK(stcb_tmp); 6363 6364 if (stcb->asoc.state == 0) { 6365 /* the assoc was freed? */ 6366 return (-21); 6367 } 6368 return (-22); 6369 } 6370 } 6371 } else 6372 #endif 6373 if (ptype == SCTP_ECN_CAPABLE) { 6374 ecn_supported = 1; 6375 } else if (ptype == SCTP_ULP_ADAPTATION) { 6376 if (stcb->asoc.state != SCTP_STATE_OPEN) { 6377 struct sctp_adaptation_layer_indication ai, 6378 *aip; 6379 6380 phdr = sctp_get_next_param(m, offset, 6381 (struct sctp_paramhdr *)&ai, sizeof(ai)); 6382 aip = (struct sctp_adaptation_layer_indication *)phdr; 6383 if (aip) { 6384 stcb->asoc.peers_adaptation = ntohl(aip->indication); 6385 stcb->asoc.adaptation_needed = 1; 6386 } 6387 } 6388 } else if (ptype == SCTP_SET_PRIM_ADDR) { 6389 struct sctp_asconf_addr_param lstore, *fee; 6390 int lptype; 6391 struct sockaddr *lsa = NULL; 6392 6393 #ifdef INET 6394 struct sctp_asconf_addrv4_param *fii; 6395 6396 #endif 6397 6398 stcb->asoc.peer_supports_asconf = 1; 6399 if (plen > sizeof(lstore)) { 6400 return (-23); 6401 } 6402 phdr = sctp_get_next_param(m, offset, 6403 (struct sctp_paramhdr *)&lstore, 6404 min(plen, sizeof(lstore))); 6405 if (phdr == NULL) { 6406 return (-24); 6407 } 6408 fee = (struct sctp_asconf_addr_param *)phdr; 6409 lptype = ntohs(fee->addrp.ph.param_type); 6410 switch (lptype) { 6411 #ifdef INET 6412 case SCTP_IPV4_ADDRESS: 6413 if (plen != 6414 sizeof(struct sctp_asconf_addrv4_param)) { 6415 SCTP_PRINTF("Sizeof setprim in init/init ack not %d but %d - ignored\n", 6416 (int)sizeof(struct sctp_asconf_addrv4_param), 6417 plen); 6418 } else { 6419 fii = (struct sctp_asconf_addrv4_param *)fee; 6420 sin.sin_addr.s_addr = fii->addrp.addr; 6421 lsa = (struct sockaddr *)&sin; 6422 } 6423 break; 6424 #endif 6425 #ifdef INET6 6426 case SCTP_IPV6_ADDRESS: 6427 if (plen != 6428 sizeof(struct sctp_asconf_addr_param)) { 6429 SCTP_PRINTF("Sizeof setprim (v6) in init/init ack not %d but %d - ignored\n", 6430 (int)sizeof(struct sctp_asconf_addr_param), 6431 plen); 6432 } else { 6433 memcpy(sin6.sin6_addr.s6_addr, 6434 fee->addrp.addr, 6435 sizeof(fee->addrp.addr)); 6436 lsa = (struct sockaddr *)&sin6; 6437 } 6438 break; 6439 #endif 6440 default: 6441 break; 6442 } 6443 if (lsa) { 6444 (void)sctp_set_primary_addr(stcb, sa, NULL); 6445 } 6446 } else if (ptype == SCTP_HAS_NAT_SUPPORT) { 6447 stcb->asoc.peer_supports_nat = 1; 6448 } else if (ptype == SCTP_PRSCTP_SUPPORTED) { 6449 /* Peer supports pr-sctp */ 6450 prsctp_supported = 1; 6451 } else if (ptype == SCTP_SUPPORTED_CHUNK_EXT) { 6452 /* A supported extension chunk */ 6453 struct sctp_supported_chunk_types_param *pr_supported; 6454 uint8_t local_store[SCTP_PARAM_BUFFER_SIZE]; 6455 int num_ent, i; 6456 6457 phdr = sctp_get_next_param(m, offset, 6458 (struct sctp_paramhdr *)&local_store, min(sizeof(local_store), plen)); 6459 if (phdr == NULL) { 6460 return (-25); 6461 } 6462 stcb->asoc.peer_supports_asconf = 0; 6463 stcb->asoc.peer_supports_auth = 0; 6464 pr_supported = (struct sctp_supported_chunk_types_param *)phdr; 6465 num_ent = plen - sizeof(struct sctp_paramhdr); 6466 for (i = 0; i < num_ent; i++) { 6467 switch (pr_supported->chunk_types[i]) { 6468 case SCTP_ASCONF: 6469 case SCTP_ASCONF_ACK: 6470 stcb->asoc.peer_supports_asconf = 1; 6471 break; 6472 case SCTP_FORWARD_CUM_TSN: 6473 prsctp_supported = 1; 6474 break; 6475 case SCTP_PACKET_DROPPED: 6476 pktdrop_supported = 1; 6477 break; 6478 case SCTP_NR_SELECTIVE_ACK: 6479 nrsack_supported = 1; 6480 break; 6481 case SCTP_STREAM_RESET: 6482 reconfig_supported = 1; 6483 break; 6484 case SCTP_AUTHENTICATION: 6485 stcb->asoc.peer_supports_auth = 1; 6486 break; 6487 default: 6488 /* one I have not learned yet */ 6489 break; 6490 6491 } 6492 } 6493 } else if (ptype == SCTP_RANDOM) { 6494 if (plen > sizeof(random_store)) 6495 break; 6496 if (got_random) { 6497 /* already processed a RANDOM */ 6498 goto next_param; 6499 } 6500 phdr = sctp_get_next_param(m, offset, 6501 (struct sctp_paramhdr *)random_store, 6502 min(sizeof(random_store), plen)); 6503 if (phdr == NULL) 6504 return (-26); 6505 p_random = (struct sctp_auth_random *)phdr; 6506 random_len = plen - sizeof(*p_random); 6507 /* enforce the random length */ 6508 if (random_len != SCTP_AUTH_RANDOM_SIZE_REQUIRED) { 6509 SCTPDBG(SCTP_DEBUG_AUTH1, "SCTP: invalid RANDOM len\n"); 6510 return (-27); 6511 } 6512 got_random = 1; 6513 } else if (ptype == SCTP_HMAC_LIST) { 6514 int num_hmacs; 6515 int i; 6516 6517 if (plen > sizeof(hmacs_store)) 6518 break; 6519 if (got_hmacs) { 6520 /* already processed a HMAC list */ 6521 goto next_param; 6522 } 6523 phdr = sctp_get_next_param(m, offset, 6524 (struct sctp_paramhdr *)hmacs_store, 6525 min(plen, sizeof(hmacs_store))); 6526 if (phdr == NULL) 6527 return (-28); 6528 hmacs = (struct sctp_auth_hmac_algo *)phdr; 6529 hmacs_len = plen - sizeof(*hmacs); 6530 num_hmacs = hmacs_len / sizeof(hmacs->hmac_ids[0]); 6531 /* validate the hmac list */ 6532 if (sctp_verify_hmac_param(hmacs, num_hmacs)) { 6533 return (-29); 6534 } 6535 if (stcb->asoc.peer_hmacs != NULL) 6536 sctp_free_hmaclist(stcb->asoc.peer_hmacs); 6537 stcb->asoc.peer_hmacs = sctp_alloc_hmaclist(num_hmacs); 6538 if (stcb->asoc.peer_hmacs != NULL) { 6539 for (i = 0; i < num_hmacs; i++) { 6540 (void)sctp_auth_add_hmacid(stcb->asoc.peer_hmacs, 6541 ntohs(hmacs->hmac_ids[i])); 6542 } 6543 } 6544 got_hmacs = 1; 6545 } else if (ptype == SCTP_CHUNK_LIST) { 6546 int i; 6547 6548 if (plen > sizeof(chunks_store)) 6549 break; 6550 if (got_chklist) { 6551 /* already processed a Chunks list */ 6552 goto next_param; 6553 } 6554 phdr = sctp_get_next_param(m, offset, 6555 (struct sctp_paramhdr *)chunks_store, 6556 min(plen, sizeof(chunks_store))); 6557 if (phdr == NULL) 6558 return (-30); 6559 chunks = (struct sctp_auth_chunk_list *)phdr; 6560 num_chunks = plen - sizeof(*chunks); 6561 if (stcb->asoc.peer_auth_chunks != NULL) 6562 sctp_clear_chunklist(stcb->asoc.peer_auth_chunks); 6563 else 6564 stcb->asoc.peer_auth_chunks = sctp_alloc_chunklist(); 6565 for (i = 0; i < num_chunks; i++) { 6566 (void)sctp_auth_add_chunk(chunks->chunk_types[i], 6567 stcb->asoc.peer_auth_chunks); 6568 /* record asconf/asconf-ack if listed */ 6569 if (chunks->chunk_types[i] == SCTP_ASCONF) 6570 saw_asconf = 1; 6571 if (chunks->chunk_types[i] == SCTP_ASCONF_ACK) 6572 saw_asconf_ack = 1; 6573 6574 } 6575 got_chklist = 1; 6576 } else if ((ptype == SCTP_HEARTBEAT_INFO) || 6577 (ptype == SCTP_STATE_COOKIE) || 6578 (ptype == SCTP_UNRECOG_PARAM) || 6579 (ptype == SCTP_COOKIE_PRESERVE) || 6580 (ptype == SCTP_SUPPORTED_ADDRTYPE) || 6581 (ptype == SCTP_ADD_IP_ADDRESS) || 6582 (ptype == SCTP_DEL_IP_ADDRESS) || 6583 (ptype == SCTP_ERROR_CAUSE_IND) || 6584 (ptype == SCTP_SUCCESS_REPORT)) { 6585 /* don't care */ ; 6586 } else { 6587 if ((ptype & 0x8000) == 0x0000) { 6588 /* 6589 * must stop processing the rest of the 6590 * param's. Any report bits were handled 6591 * with the call to 6592 * sctp_arethere_unrecognized_parameters() 6593 * when the INIT or INIT-ACK was first seen. 6594 */ 6595 break; 6596 } 6597 } 6598 6599 next_param: 6600 offset += SCTP_SIZE32(plen); 6601 if (offset >= limit) { 6602 break; 6603 } 6604 phdr = sctp_get_next_param(m, offset, &parm_buf, 6605 sizeof(parm_buf)); 6606 } 6607 /* Now check to see if we need to purge any addresses */ 6608 TAILQ_FOREACH_SAFE(net, &stcb->asoc.nets, sctp_next, nnet) { 6609 if ((net->dest_state & SCTP_ADDR_NOT_IN_ASSOC) == 6610 SCTP_ADDR_NOT_IN_ASSOC) { 6611 /* This address has been removed from the asoc */ 6612 /* remove and free it */ 6613 stcb->asoc.numnets--; 6614 TAILQ_REMOVE(&stcb->asoc.nets, net, sctp_next); 6615 sctp_free_remote_addr(net); 6616 if (net == stcb->asoc.primary_destination) { 6617 stcb->asoc.primary_destination = NULL; 6618 sctp_select_primary_destination(stcb); 6619 } 6620 } 6621 } 6622 stcb->asoc.ecn_supported &= ecn_supported; 6623 stcb->asoc.prsctp_supported &= prsctp_supported; 6624 stcb->asoc.reconfig_supported &= reconfig_supported; 6625 stcb->asoc.nrsack_supported &= nrsack_supported; 6626 stcb->asoc.pktdrop_supported &= pktdrop_supported; 6627 /* validate authentication required parameters */ 6628 if (got_random && got_hmacs) { 6629 stcb->asoc.peer_supports_auth = 1; 6630 } else { 6631 stcb->asoc.peer_supports_auth = 0; 6632 } 6633 if (!stcb->asoc.peer_supports_auth && got_chklist) { 6634 /* peer does not support auth but sent a chunks list? */ 6635 return (-31); 6636 } 6637 if (stcb->asoc.peer_supports_asconf && !stcb->asoc.peer_supports_auth) { 6638 /* peer supports asconf but not auth? */ 6639 return (-32); 6640 } else if ((stcb->asoc.peer_supports_asconf) && (stcb->asoc.peer_supports_auth) && 6641 ((saw_asconf == 0) || (saw_asconf_ack == 0))) { 6642 return (-33); 6643 } 6644 /* concatenate the full random key */ 6645 keylen = sizeof(*p_random) + random_len + sizeof(*hmacs) + hmacs_len; 6646 if (chunks != NULL) { 6647 keylen += sizeof(*chunks) + num_chunks; 6648 } 6649 new_key = sctp_alloc_key(keylen); 6650 if (new_key != NULL) { 6651 /* copy in the RANDOM */ 6652 if (p_random != NULL) { 6653 keylen = sizeof(*p_random) + random_len; 6654 bcopy(p_random, new_key->key, keylen); 6655 } 6656 /* append in the AUTH chunks */ 6657 if (chunks != NULL) { 6658 bcopy(chunks, new_key->key + keylen, 6659 sizeof(*chunks) + num_chunks); 6660 keylen += sizeof(*chunks) + num_chunks; 6661 } 6662 /* append in the HMACs */ 6663 if (hmacs != NULL) { 6664 bcopy(hmacs, new_key->key + keylen, 6665 sizeof(*hmacs) + hmacs_len); 6666 } 6667 } else { 6668 /* failed to get memory for the key */ 6669 return (-34); 6670 } 6671 if (stcb->asoc.authinfo.peer_random != NULL) 6672 sctp_free_key(stcb->asoc.authinfo.peer_random); 6673 stcb->asoc.authinfo.peer_random = new_key; 6674 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.assoc_keyid); 6675 sctp_clear_cachedkeys(stcb, stcb->asoc.authinfo.recv_keyid); 6676 6677 return (0); 6678 } 6679 6680 int 6681 sctp_set_primary_addr(struct sctp_tcb *stcb, struct sockaddr *sa, 6682 struct sctp_nets *net) 6683 { 6684 /* make sure the requested primary address exists in the assoc */ 6685 if (net == NULL && sa) 6686 net = sctp_findnet(stcb, sa); 6687 6688 if (net == NULL) { 6689 /* didn't find the requested primary address! */ 6690 return (-1); 6691 } else { 6692 /* set the primary address */ 6693 if (net->dest_state & SCTP_ADDR_UNCONFIRMED) { 6694 /* Must be confirmed, so queue to set */ 6695 net->dest_state |= SCTP_ADDR_REQ_PRIMARY; 6696 return (0); 6697 } 6698 stcb->asoc.primary_destination = net; 6699 if (!(net->dest_state & SCTP_ADDR_PF) && (stcb->asoc.alternate)) { 6700 sctp_free_remote_addr(stcb->asoc.alternate); 6701 stcb->asoc.alternate = NULL; 6702 } 6703 net = TAILQ_FIRST(&stcb->asoc.nets); 6704 if (net != stcb->asoc.primary_destination) { 6705 /* 6706 * first one on the list is NOT the primary 6707 * sctp_cmpaddr() is much more efficient if the 6708 * primary is the first on the list, make it so. 6709 */ 6710 TAILQ_REMOVE(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6711 TAILQ_INSERT_HEAD(&stcb->asoc.nets, stcb->asoc.primary_destination, sctp_next); 6712 } 6713 return (0); 6714 } 6715 } 6716 6717 int 6718 sctp_is_vtag_good(uint32_t tag, uint16_t lport, uint16_t rport, struct timeval *now) 6719 { 6720 /* 6721 * This function serves two purposes. It will see if a TAG can be 6722 * re-used and return 1 for yes it is ok and 0 for don't use that 6723 * tag. A secondary function it will do is purge out old tags that 6724 * can be removed. 6725 */ 6726 struct sctpvtaghead *chain; 6727 struct sctp_tagblock *twait_block; 6728 struct sctpasochead *head; 6729 struct sctp_tcb *stcb; 6730 int i; 6731 6732 SCTP_INP_INFO_RLOCK(); 6733 head = &SCTP_BASE_INFO(sctp_asochash)[SCTP_PCBHASH_ASOC(tag, 6734 SCTP_BASE_INFO(hashasocmark))]; 6735 if (head == NULL) { 6736 /* invalid vtag */ 6737 goto skip_vtag_check; 6738 } 6739 LIST_FOREACH(stcb, head, sctp_asocs) { 6740 /* 6741 * We choose not to lock anything here. TCB's can't be 6742 * removed since we have the read lock, so they can't be 6743 * freed on us, same thing for the INP. I may be wrong with 6744 * this assumption, but we will go with it for now :-) 6745 */ 6746 if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) { 6747 continue; 6748 } 6749 if (stcb->asoc.my_vtag == tag) { 6750 /* candidate */ 6751 if (stcb->rport != rport) { 6752 continue; 6753 } 6754 if (stcb->sctp_ep->sctp_lport != lport) { 6755 continue; 6756 } 6757 /* Its a used tag set */ 6758 SCTP_INP_INFO_RUNLOCK(); 6759 return (0); 6760 } 6761 } 6762 skip_vtag_check: 6763 6764 chain = &SCTP_BASE_INFO(vtag_timewait)[(tag % SCTP_STACK_VTAG_HASH_SIZE)]; 6765 /* Now what about timed wait ? */ 6766 LIST_FOREACH(twait_block, chain, sctp_nxt_tagblock) { 6767 /* 6768 * Block(s) are present, lets see if we have this tag in the 6769 * list 6770 */ 6771 for (i = 0; i < SCTP_NUMBER_IN_VTAG_BLOCK; i++) { 6772 if (twait_block->vtag_block[i].v_tag == 0) { 6773 /* not used */ 6774 continue; 6775 } else if ((long)twait_block->vtag_block[i].tv_sec_at_expire < 6776 now->tv_sec) { 6777 /* Audit expires this guy */ 6778 twait_block->vtag_block[i].tv_sec_at_expire = 0; 6779 twait_block->vtag_block[i].v_tag = 0; 6780 twait_block->vtag_block[i].lport = 0; 6781 twait_block->vtag_block[i].rport = 0; 6782 } else if ((twait_block->vtag_block[i].v_tag == tag) && 6783 (twait_block->vtag_block[i].lport == lport) && 6784 (twait_block->vtag_block[i].rport == rport)) { 6785 /* Bad tag, sorry :< */ 6786 SCTP_INP_INFO_RUNLOCK(); 6787 return (0); 6788 } 6789 } 6790 } 6791 SCTP_INP_INFO_RUNLOCK(); 6792 return (1); 6793 } 6794 6795 static void 6796 sctp_drain_mbufs(struct sctp_tcb *stcb) 6797 { 6798 /* 6799 * We must hunt this association for MBUF's past the cumack (i.e. 6800 * out of order data that we can renege on). 6801 */ 6802 struct sctp_association *asoc; 6803 struct sctp_tmit_chunk *chk, *nchk; 6804 uint32_t cumulative_tsn_p1; 6805 struct sctp_queued_to_read *ctl, *nctl; 6806 int cnt, strmat; 6807 uint32_t gap, i; 6808 int fnd = 0; 6809 6810 /* We look for anything larger than the cum-ack + 1 */ 6811 6812 asoc = &stcb->asoc; 6813 if (asoc->cumulative_tsn == asoc->highest_tsn_inside_map) { 6814 /* none we can reneg on. */ 6815 return; 6816 } 6817 SCTP_STAT_INCR(sctps_protocol_drains_done); 6818 cumulative_tsn_p1 = asoc->cumulative_tsn + 1; 6819 cnt = 0; 6820 /* First look in the re-assembly queue */ 6821 TAILQ_FOREACH_SAFE(chk, &asoc->reasmqueue, sctp_next, nchk) { 6822 if (SCTP_TSN_GT(chk->rec.data.TSN_seq, cumulative_tsn_p1)) { 6823 /* Yep it is above cum-ack */ 6824 cnt++; 6825 SCTP_CALC_TSN_TO_GAP(gap, chk->rec.data.TSN_seq, asoc->mapping_array_base_tsn); 6826 asoc->size_on_reasm_queue = sctp_sbspace_sub(asoc->size_on_reasm_queue, chk->send_size); 6827 sctp_ucount_decr(asoc->cnt_on_reasm_queue); 6828 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6829 TAILQ_REMOVE(&asoc->reasmqueue, chk, sctp_next); 6830 if (chk->data) { 6831 sctp_m_freem(chk->data); 6832 chk->data = NULL; 6833 } 6834 sctp_free_a_chunk(stcb, chk, SCTP_SO_NOT_LOCKED); 6835 } 6836 } 6837 /* Ok that was fun, now we will drain all the inbound streams? */ 6838 for (strmat = 0; strmat < asoc->streamincnt; strmat++) { 6839 TAILQ_FOREACH_SAFE(ctl, &asoc->strmin[strmat].inqueue, next, nctl) { 6840 if (SCTP_TSN_GT(ctl->sinfo_tsn, cumulative_tsn_p1)) { 6841 /* Yep it is above cum-ack */ 6842 cnt++; 6843 SCTP_CALC_TSN_TO_GAP(gap, ctl->sinfo_tsn, asoc->mapping_array_base_tsn); 6844 asoc->size_on_all_streams = sctp_sbspace_sub(asoc->size_on_all_streams, ctl->length); 6845 sctp_ucount_decr(asoc->cnt_on_all_streams); 6846 SCTP_UNSET_TSN_PRESENT(asoc->mapping_array, gap); 6847 TAILQ_REMOVE(&asoc->strmin[strmat].inqueue, ctl, next); 6848 if (ctl->data) { 6849 sctp_m_freem(ctl->data); 6850 ctl->data = NULL; 6851 } 6852 sctp_free_remote_addr(ctl->whoFrom); 6853 SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), ctl); 6854 SCTP_DECR_READQ_COUNT(); 6855 } 6856 } 6857 } 6858 if (cnt) { 6859 /* We must back down to see what the new highest is */ 6860 for (i = asoc->highest_tsn_inside_map; SCTP_TSN_GE(i, asoc->mapping_array_base_tsn); i--) { 6861 SCTP_CALC_TSN_TO_GAP(gap, i, asoc->mapping_array_base_tsn); 6862 if (SCTP_IS_TSN_PRESENT(asoc->mapping_array, gap)) { 6863 asoc->highest_tsn_inside_map = i; 6864 fnd = 1; 6865 break; 6866 } 6867 } 6868 if (!fnd) { 6869 asoc->highest_tsn_inside_map = asoc->mapping_array_base_tsn - 1; 6870 } 6871 /* 6872 * Question, should we go through the delivery queue? The 6873 * only reason things are on here is the app not reading OR 6874 * a p-d-api up. An attacker COULD send enough in to 6875 * initiate the PD-API and then send a bunch of stuff to 6876 * other streams... these would wind up on the delivery 6877 * queue.. and then we would not get to them. But in order 6878 * to do this I then have to back-track and un-deliver 6879 * sequence numbers in streams.. el-yucko. I think for now 6880 * we will NOT look at the delivery queue and leave it to be 6881 * something to consider later. An alternative would be to 6882 * abort the P-D-API with a notification and then deliver 6883 * the data.... Or another method might be to keep track of 6884 * how many times the situation occurs and if we see a 6885 * possible attack underway just abort the association. 6886 */ 6887 #ifdef SCTP_DEBUG 6888 SCTPDBG(SCTP_DEBUG_PCB1, "Freed %d chunks from reneg harvest\n", cnt); 6889 #endif 6890 /* 6891 * Now do we need to find a new 6892 * asoc->highest_tsn_inside_map? 6893 */ 6894 asoc->last_revoke_count = cnt; 6895 (void)SCTP_OS_TIMER_STOP(&stcb->asoc.dack_timer.timer); 6896 /* sa_ignore NO_NULL_CHK */ 6897 sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED); 6898 sctp_chunk_output(stcb->sctp_ep, stcb, SCTP_OUTPUT_FROM_DRAIN, SCTP_SO_NOT_LOCKED); 6899 } 6900 /* 6901 * Another issue, in un-setting the TSN's in the mapping array we 6902 * DID NOT adjust the highest_tsn marker. This will cause one of 6903 * two things to occur. It may cause us to do extra work in checking 6904 * for our mapping array movement. More importantly it may cause us 6905 * to SACK every datagram. This may not be a bad thing though since 6906 * we will recover once we get our cum-ack above and all this stuff 6907 * we dumped recovered. 6908 */ 6909 } 6910 6911 void 6912 sctp_drain() 6913 { 6914 /* 6915 * We must walk the PCB lists for ALL associations here. The system 6916 * is LOW on MBUF's and needs help. This is where reneging will 6917 * occur. We really hope this does NOT happen! 6918 */ 6919 VNET_ITERATOR_DECL(vnet_iter); 6920 VNET_LIST_RLOCK_NOSLEEP(); 6921 VNET_FOREACH(vnet_iter) { 6922 CURVNET_SET(vnet_iter); 6923 struct sctp_inpcb *inp; 6924 struct sctp_tcb *stcb; 6925 6926 SCTP_STAT_INCR(sctps_protocol_drain_calls); 6927 if (SCTP_BASE_SYSCTL(sctp_do_drain) == 0) { 6928 #ifdef VIMAGE 6929 continue; 6930 #else 6931 return; 6932 #endif 6933 } 6934 SCTP_INP_INFO_RLOCK(); 6935 LIST_FOREACH(inp, &SCTP_BASE_INFO(listhead), sctp_list) { 6936 /* For each endpoint */ 6937 SCTP_INP_RLOCK(inp); 6938 LIST_FOREACH(stcb, &inp->sctp_asoc_list, sctp_tcblist) { 6939 /* For each association */ 6940 SCTP_TCB_LOCK(stcb); 6941 sctp_drain_mbufs(stcb); 6942 SCTP_TCB_UNLOCK(stcb); 6943 } 6944 SCTP_INP_RUNLOCK(inp); 6945 } 6946 SCTP_INP_INFO_RUNLOCK(); 6947 CURVNET_RESTORE(); 6948 } 6949 VNET_LIST_RUNLOCK_NOSLEEP(); 6950 } 6951 6952 /* 6953 * start a new iterator 6954 * iterates through all endpoints and associations based on the pcb_state 6955 * flags and asoc_state. "af" (mandatory) is executed for all matching 6956 * assocs and "ef" (optional) is executed when the iterator completes. 6957 * "inpf" (optional) is executed for each new endpoint as it is being 6958 * iterated through. inpe (optional) is called when the inp completes 6959 * its way through all the stcbs. 6960 */ 6961 int 6962 sctp_initiate_iterator(inp_func inpf, 6963 asoc_func af, 6964 inp_func inpe, 6965 uint32_t pcb_state, 6966 uint32_t pcb_features, 6967 uint32_t asoc_state, 6968 void *argp, 6969 uint32_t argi, 6970 end_func ef, 6971 struct sctp_inpcb *s_inp, 6972 uint8_t chunk_output_off) 6973 { 6974 struct sctp_iterator *it = NULL; 6975 6976 if (af == NULL) { 6977 return (-1); 6978 } 6979 SCTP_MALLOC(it, struct sctp_iterator *, sizeof(struct sctp_iterator), 6980 SCTP_M_ITER); 6981 if (it == NULL) { 6982 SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTP_PCB, ENOMEM); 6983 return (ENOMEM); 6984 } 6985 memset(it, 0, sizeof(*it)); 6986 it->function_assoc = af; 6987 it->function_inp = inpf; 6988 if (inpf) 6989 it->done_current_ep = 0; 6990 else 6991 it->done_current_ep = 1; 6992 it->function_atend = ef; 6993 it->pointer = argp; 6994 it->val = argi; 6995 it->pcb_flags = pcb_state; 6996 it->pcb_features = pcb_features; 6997 it->asoc_state = asoc_state; 6998 it->function_inp_end = inpe; 6999 it->no_chunk_output = chunk_output_off; 7000 it->vn = curvnet; 7001 if (s_inp) { 7002 /* Assume lock is held here */ 7003 it->inp = s_inp; 7004 SCTP_INP_INCR_REF(it->inp); 7005 it->iterator_flags = SCTP_ITERATOR_DO_SINGLE_INP; 7006 } else { 7007 SCTP_INP_INFO_RLOCK(); 7008 it->inp = LIST_FIRST(&SCTP_BASE_INFO(listhead)); 7009 if (it->inp) { 7010 SCTP_INP_INCR_REF(it->inp); 7011 } 7012 SCTP_INP_INFO_RUNLOCK(); 7013 it->iterator_flags = SCTP_ITERATOR_DO_ALL_INP; 7014 7015 } 7016 SCTP_IPI_ITERATOR_WQ_LOCK(); 7017 7018 TAILQ_INSERT_TAIL(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr); 7019 if (sctp_it_ctl.iterator_running == 0) { 7020 sctp_wakeup_iterator(); 7021 } 7022 SCTP_IPI_ITERATOR_WQ_UNLOCK(); 7023 /* sa_ignore MEMLEAK {memory is put on the tailq for the iterator} */ 7024 return (0); 7025 } 7026