1 /* 2 * hostapd / IEEE 802.11 authentication (ACL) 3 * Copyright (c) 2003-2012, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 * 8 * Access control list for IEEE 802.11 authentication can uses statically 9 * configured ACL from configuration files or an external RADIUS server. 10 * Results from external RADIUS queries are cached to allow faster 11 * authentication frame processing. 12 */ 13 14 #include "utils/includes.h" 15 16 #include "utils/common.h" 17 #include "utils/eloop.h" 18 #include "radius/radius.h" 19 #include "radius/radius_client.h" 20 #include "hostapd.h" 21 #include "ap_config.h" 22 #include "ap_drv_ops.h" 23 #include "ieee802_11.h" 24 #include "ieee802_1x.h" 25 #include "ieee802_11_auth.h" 26 27 #define RADIUS_ACL_TIMEOUT 30 28 29 30 struct hostapd_cached_radius_acl { 31 struct os_reltime timestamp; 32 macaddr addr; 33 int accepted; /* HOSTAPD_ACL_* */ 34 struct hostapd_cached_radius_acl *next; 35 u32 session_timeout; 36 u32 acct_interim_interval; 37 struct vlan_description vlan_id; 38 struct hostapd_sta_wpa_psk_short *psk; 39 char *identity; 40 char *radius_cui; 41 }; 42 43 44 struct hostapd_acl_query_data { 45 struct os_reltime timestamp; 46 u8 radius_id; 47 macaddr addr; 48 u8 *auth_msg; /* IEEE 802.11 authentication frame from station */ 49 size_t auth_msg_len; 50 struct hostapd_acl_query_data *next; 51 }; 52 53 54 #ifndef CONFIG_NO_RADIUS 55 static void hostapd_acl_cache_free_entry(struct hostapd_cached_radius_acl *e) 56 { 57 os_free(e->identity); 58 os_free(e->radius_cui); 59 hostapd_free_psk_list(e->psk); 60 os_free(e); 61 } 62 63 64 static void hostapd_acl_cache_free(struct hostapd_cached_radius_acl *acl_cache) 65 { 66 struct hostapd_cached_radius_acl *prev; 67 68 while (acl_cache) { 69 prev = acl_cache; 70 acl_cache = acl_cache->next; 71 hostapd_acl_cache_free_entry(prev); 72 } 73 } 74 75 76 static void copy_psk_list(struct hostapd_sta_wpa_psk_short **psk, 77 struct hostapd_sta_wpa_psk_short *src) 78 { 79 if (!psk) 80 return; 81 82 if (src) 83 src->ref++; 84 85 *psk = src; 86 } 87 88 89 static int hostapd_acl_cache_get(struct hostapd_data *hapd, const u8 *addr, 90 u32 *session_timeout, 91 u32 *acct_interim_interval, 92 struct vlan_description *vlan_id, 93 struct hostapd_sta_wpa_psk_short **psk, 94 char **identity, char **radius_cui) 95 { 96 struct hostapd_cached_radius_acl *entry; 97 struct os_reltime now; 98 99 os_get_reltime(&now); 100 101 for (entry = hapd->acl_cache; entry; entry = entry->next) { 102 if (os_memcmp(entry->addr, addr, ETH_ALEN) != 0) 103 continue; 104 105 if (os_reltime_expired(&now, &entry->timestamp, 106 RADIUS_ACL_TIMEOUT)) 107 return -1; /* entry has expired */ 108 if (entry->accepted == HOSTAPD_ACL_ACCEPT_TIMEOUT) 109 if (session_timeout) 110 *session_timeout = entry->session_timeout; 111 if (acct_interim_interval) 112 *acct_interim_interval = 113 entry->acct_interim_interval; 114 if (vlan_id) 115 *vlan_id = entry->vlan_id; 116 copy_psk_list(psk, entry->psk); 117 if (identity) { 118 if (entry->identity) 119 *identity = os_strdup(entry->identity); 120 else 121 *identity = NULL; 122 } 123 if (radius_cui) { 124 if (entry->radius_cui) 125 *radius_cui = os_strdup(entry->radius_cui); 126 else 127 *radius_cui = NULL; 128 } 129 return entry->accepted; 130 } 131 132 return -1; 133 } 134 #endif /* CONFIG_NO_RADIUS */ 135 136 137 static void hostapd_acl_query_free(struct hostapd_acl_query_data *query) 138 { 139 if (query == NULL) 140 return; 141 os_free(query->auth_msg); 142 os_free(query); 143 } 144 145 146 #ifndef CONFIG_NO_RADIUS 147 static int hostapd_radius_acl_query(struct hostapd_data *hapd, const u8 *addr, 148 struct hostapd_acl_query_data *query) 149 { 150 struct radius_msg *msg; 151 char buf[128]; 152 153 query->radius_id = radius_client_get_id(hapd->radius); 154 msg = radius_msg_new(RADIUS_CODE_ACCESS_REQUEST, query->radius_id); 155 if (msg == NULL) 156 return -1; 157 158 if (radius_msg_make_authenticator(msg) < 0) { 159 wpa_printf(MSG_INFO, "Could not make Request Authenticator"); 160 goto fail; 161 } 162 163 os_snprintf(buf, sizeof(buf), RADIUS_ADDR_FORMAT, MAC2STR(addr)); 164 if (!radius_msg_add_attr(msg, RADIUS_ATTR_USER_NAME, (u8 *) buf, 165 os_strlen(buf))) { 166 wpa_printf(MSG_DEBUG, "Could not add User-Name"); 167 goto fail; 168 } 169 170 if (!radius_msg_add_attr_user_password( 171 msg, (u8 *) buf, os_strlen(buf), 172 hapd->conf->radius->auth_server->shared_secret, 173 hapd->conf->radius->auth_server->shared_secret_len)) { 174 wpa_printf(MSG_DEBUG, "Could not add User-Password"); 175 goto fail; 176 } 177 178 if (add_common_radius_attr(hapd, hapd->conf->radius_auth_req_attr, 179 NULL, msg) < 0) 180 goto fail; 181 182 os_snprintf(buf, sizeof(buf), RADIUS_802_1X_ADDR_FORMAT, 183 MAC2STR(addr)); 184 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CALLING_STATION_ID, 185 (u8 *) buf, os_strlen(buf))) { 186 wpa_printf(MSG_DEBUG, "Could not add Calling-Station-Id"); 187 goto fail; 188 } 189 190 os_snprintf(buf, sizeof(buf), "CONNECT 11Mbps 802.11b"); 191 if (!radius_msg_add_attr(msg, RADIUS_ATTR_CONNECT_INFO, 192 (u8 *) buf, os_strlen(buf))) { 193 wpa_printf(MSG_DEBUG, "Could not add Connect-Info"); 194 goto fail; 195 } 196 197 if (radius_client_send(hapd->radius, msg, RADIUS_AUTH, addr) < 0) 198 goto fail; 199 return 0; 200 201 fail: 202 radius_msg_free(msg); 203 return -1; 204 } 205 #endif /* CONFIG_NO_RADIUS */ 206 207 208 /** 209 * hostapd_check_acl - Check a specified STA against accept/deny ACLs 210 * @hapd: hostapd BSS data 211 * @addr: MAC address of the STA 212 * @vlan_id: Buffer for returning VLAN ID 213 * Returns: HOSTAPD_ACL_ACCEPT, HOSTAPD_ACL_REJECT, or HOSTAPD_ACL_PENDING 214 */ 215 int hostapd_check_acl(struct hostapd_data *hapd, const u8 *addr, 216 struct vlan_description *vlan_id) 217 { 218 if (hostapd_maclist_found(hapd->conf->accept_mac, 219 hapd->conf->num_accept_mac, addr, vlan_id)) 220 return HOSTAPD_ACL_ACCEPT; 221 222 if (hostapd_maclist_found(hapd->conf->deny_mac, 223 hapd->conf->num_deny_mac, addr, vlan_id)) 224 return HOSTAPD_ACL_REJECT; 225 226 if (hapd->conf->macaddr_acl == ACCEPT_UNLESS_DENIED) 227 return HOSTAPD_ACL_ACCEPT; 228 if (hapd->conf->macaddr_acl == DENY_UNLESS_ACCEPTED) 229 return HOSTAPD_ACL_REJECT; 230 231 return HOSTAPD_ACL_PENDING; 232 } 233 234 235 /** 236 * hostapd_allowed_address - Check whether a specified STA can be authenticated 237 * @hapd: hostapd BSS data 238 * @addr: MAC address of the STA 239 * @msg: Authentication message 240 * @len: Length of msg in octets 241 * @session_timeout: Buffer for returning session timeout (from RADIUS) 242 * @acct_interim_interval: Buffer for returning account interval (from RADIUS) 243 * @vlan_id: Buffer for returning VLAN ID 244 * @psk: Linked list buffer for returning WPA PSK 245 * @identity: Buffer for returning identity (from RADIUS) 246 * @radius_cui: Buffer for returning CUI (from RADIUS) 247 * Returns: HOSTAPD_ACL_ACCEPT, HOSTAPD_ACL_REJECT, or HOSTAPD_ACL_PENDING 248 * 249 * The caller is responsible for freeing the returned *identity and *radius_cui 250 * values with os_free(). 251 */ 252 int hostapd_allowed_address(struct hostapd_data *hapd, const u8 *addr, 253 const u8 *msg, size_t len, u32 *session_timeout, 254 u32 *acct_interim_interval, 255 struct vlan_description *vlan_id, 256 struct hostapd_sta_wpa_psk_short **psk, 257 char **identity, char **radius_cui) 258 { 259 int res; 260 261 if (session_timeout) 262 *session_timeout = 0; 263 if (acct_interim_interval) 264 *acct_interim_interval = 0; 265 if (vlan_id) 266 os_memset(vlan_id, 0, sizeof(*vlan_id)); 267 if (psk) 268 *psk = NULL; 269 if (identity) 270 *identity = NULL; 271 if (radius_cui) 272 *radius_cui = NULL; 273 274 res = hostapd_check_acl(hapd, addr, vlan_id); 275 if (res != HOSTAPD_ACL_PENDING) 276 return res; 277 278 if (hapd->conf->macaddr_acl == USE_EXTERNAL_RADIUS_AUTH) { 279 #ifdef CONFIG_NO_RADIUS 280 return HOSTAPD_ACL_REJECT; 281 #else /* CONFIG_NO_RADIUS */ 282 struct hostapd_acl_query_data *query; 283 284 /* Check whether ACL cache has an entry for this station */ 285 res = hostapd_acl_cache_get(hapd, addr, session_timeout, 286 acct_interim_interval, vlan_id, psk, 287 identity, radius_cui); 288 if (res == HOSTAPD_ACL_ACCEPT || 289 res == HOSTAPD_ACL_ACCEPT_TIMEOUT) 290 return res; 291 if (res == HOSTAPD_ACL_REJECT) 292 return HOSTAPD_ACL_REJECT; 293 294 query = hapd->acl_queries; 295 while (query) { 296 if (os_memcmp(query->addr, addr, ETH_ALEN) == 0) { 297 /* pending query in RADIUS retransmit queue; 298 * do not generate a new one */ 299 if (identity) { 300 os_free(*identity); 301 *identity = NULL; 302 } 303 if (radius_cui) { 304 os_free(*radius_cui); 305 *radius_cui = NULL; 306 } 307 return HOSTAPD_ACL_PENDING; 308 } 309 query = query->next; 310 } 311 312 if (!hapd->conf->radius->auth_server) 313 return HOSTAPD_ACL_REJECT; 314 315 /* No entry in the cache - query external RADIUS server */ 316 query = os_zalloc(sizeof(*query)); 317 if (query == NULL) { 318 wpa_printf(MSG_ERROR, "malloc for query data failed"); 319 return HOSTAPD_ACL_REJECT; 320 } 321 os_get_reltime(&query->timestamp); 322 os_memcpy(query->addr, addr, ETH_ALEN); 323 if (hostapd_radius_acl_query(hapd, addr, query)) { 324 wpa_printf(MSG_DEBUG, "Failed to send Access-Request " 325 "for ACL query."); 326 hostapd_acl_query_free(query); 327 return HOSTAPD_ACL_REJECT; 328 } 329 330 query->auth_msg = os_malloc(len); 331 if (query->auth_msg == NULL) { 332 wpa_printf(MSG_ERROR, "Failed to allocate memory for " 333 "auth frame."); 334 hostapd_acl_query_free(query); 335 return HOSTAPD_ACL_REJECT; 336 } 337 os_memcpy(query->auth_msg, msg, len); 338 query->auth_msg_len = len; 339 query->next = hapd->acl_queries; 340 hapd->acl_queries = query; 341 342 /* Queued data will be processed in hostapd_acl_recv_radius() 343 * when RADIUS server replies to the sent Access-Request. */ 344 return HOSTAPD_ACL_PENDING; 345 #endif /* CONFIG_NO_RADIUS */ 346 } 347 348 return HOSTAPD_ACL_REJECT; 349 } 350 351 352 #ifndef CONFIG_NO_RADIUS 353 static void hostapd_acl_expire_cache(struct hostapd_data *hapd, 354 struct os_reltime *now) 355 { 356 struct hostapd_cached_radius_acl *prev, *entry, *tmp; 357 358 prev = NULL; 359 entry = hapd->acl_cache; 360 361 while (entry) { 362 if (os_reltime_expired(now, &entry->timestamp, 363 RADIUS_ACL_TIMEOUT)) { 364 wpa_printf(MSG_DEBUG, "Cached ACL entry for " MACSTR 365 " has expired.", MAC2STR(entry->addr)); 366 if (prev) 367 prev->next = entry->next; 368 else 369 hapd->acl_cache = entry->next; 370 hostapd_drv_set_radius_acl_expire(hapd, entry->addr); 371 tmp = entry; 372 entry = entry->next; 373 hostapd_acl_cache_free_entry(tmp); 374 continue; 375 } 376 377 prev = entry; 378 entry = entry->next; 379 } 380 } 381 382 383 static void hostapd_acl_expire_queries(struct hostapd_data *hapd, 384 struct os_reltime *now) 385 { 386 struct hostapd_acl_query_data *prev, *entry, *tmp; 387 388 prev = NULL; 389 entry = hapd->acl_queries; 390 391 while (entry) { 392 if (os_reltime_expired(now, &entry->timestamp, 393 RADIUS_ACL_TIMEOUT)) { 394 wpa_printf(MSG_DEBUG, "ACL query for " MACSTR 395 " has expired.", MAC2STR(entry->addr)); 396 if (prev) 397 prev->next = entry->next; 398 else 399 hapd->acl_queries = entry->next; 400 401 tmp = entry; 402 entry = entry->next; 403 hostapd_acl_query_free(tmp); 404 continue; 405 } 406 407 prev = entry; 408 entry = entry->next; 409 } 410 } 411 412 413 /** 414 * hostapd_acl_expire - ACL cache expiration callback 415 * @hapd: struct hostapd_data * 416 */ 417 void hostapd_acl_expire(struct hostapd_data *hapd) 418 { 419 struct os_reltime now; 420 421 os_get_reltime(&now); 422 hostapd_acl_expire_cache(hapd, &now); 423 hostapd_acl_expire_queries(hapd, &now); 424 } 425 426 427 static void decode_tunnel_passwords(struct hostapd_data *hapd, 428 const u8 *shared_secret, 429 size_t shared_secret_len, 430 struct radius_msg *msg, 431 struct radius_msg *req, 432 struct hostapd_cached_radius_acl *cache) 433 { 434 int passphraselen; 435 char *passphrase; 436 size_t i; 437 struct hostapd_sta_wpa_psk_short *psk; 438 439 /* 440 * Decode all tunnel passwords as PSK and save them into a linked list. 441 */ 442 for (i = 0; ; i++) { 443 passphrase = radius_msg_get_tunnel_password( 444 msg, &passphraselen, shared_secret, shared_secret_len, 445 req, i); 446 /* 447 * Passphrase is NULL iff there is no i-th Tunnel-Password 448 * attribute in msg. 449 */ 450 if (passphrase == NULL) 451 break; 452 453 /* 454 * Passphase should be 8..63 chars (to be hashed with SSID) 455 * or 64 chars hex string (no separate hashing with SSID). 456 */ 457 458 if (passphraselen < MIN_PASSPHRASE_LEN || 459 passphraselen > MAX_PASSPHRASE_LEN + 1) 460 continue; 461 462 /* 463 * passphrase does not contain the NULL termination. 464 * Add it here as pbkdf2_sha1() requires it. 465 */ 466 psk = os_zalloc(sizeof(struct hostapd_sta_wpa_psk_short)); 467 if (psk) { 468 if ((passphraselen == MAX_PASSPHRASE_LEN + 1) && 469 (hexstr2bin(passphrase, psk->psk, PMK_LEN) < 0)) { 470 hostapd_logger(hapd, cache->addr, 471 HOSTAPD_MODULE_RADIUS, 472 HOSTAPD_LEVEL_WARNING, 473 "invalid hex string (%d chars) in Tunnel-Password", 474 passphraselen); 475 goto skip; 476 } else if (passphraselen <= MAX_PASSPHRASE_LEN) { 477 os_memcpy(psk->passphrase, passphrase, 478 passphraselen); 479 psk->is_passphrase = 1; 480 } 481 psk->next = cache->psk; 482 cache->psk = psk; 483 psk = NULL; 484 } 485 skip: 486 os_free(psk); 487 os_free(passphrase); 488 } 489 } 490 491 492 /** 493 * hostapd_acl_recv_radius - Process incoming RADIUS Authentication messages 494 * @msg: RADIUS response message 495 * @req: RADIUS request message 496 * @shared_secret: RADIUS shared secret 497 * @shared_secret_len: Length of shared_secret in octets 498 * @data: Context data (struct hostapd_data *) 499 * Returns: RADIUS_RX_PROCESSED if RADIUS message was a reply to ACL query (and 500 * was processed here) or RADIUS_RX_UNKNOWN if not. 501 */ 502 static RadiusRxResult 503 hostapd_acl_recv_radius(struct radius_msg *msg, struct radius_msg *req, 504 const u8 *shared_secret, size_t shared_secret_len, 505 void *data) 506 { 507 struct hostapd_data *hapd = data; 508 struct hostapd_acl_query_data *query, *prev; 509 struct hostapd_cached_radius_acl *cache; 510 struct radius_hdr *hdr = radius_msg_get_hdr(msg); 511 int *untagged, *tagged, *notempty; 512 513 query = hapd->acl_queries; 514 prev = NULL; 515 while (query) { 516 if (query->radius_id == hdr->identifier) 517 break; 518 prev = query; 519 query = query->next; 520 } 521 if (query == NULL) 522 return RADIUS_RX_UNKNOWN; 523 524 wpa_printf(MSG_DEBUG, "Found matching Access-Request for RADIUS " 525 "message (id=%d)", query->radius_id); 526 527 if (radius_msg_verify(msg, shared_secret, shared_secret_len, req, 0)) { 528 wpa_printf(MSG_INFO, "Incoming RADIUS packet did not have " 529 "correct authenticator - dropped\n"); 530 return RADIUS_RX_INVALID_AUTHENTICATOR; 531 } 532 533 if (hdr->code != RADIUS_CODE_ACCESS_ACCEPT && 534 hdr->code != RADIUS_CODE_ACCESS_REJECT) { 535 wpa_printf(MSG_DEBUG, "Unknown RADIUS message code %d to ACL " 536 "query", hdr->code); 537 return RADIUS_RX_UNKNOWN; 538 } 539 540 /* Insert Accept/Reject info into ACL cache */ 541 cache = os_zalloc(sizeof(*cache)); 542 if (cache == NULL) { 543 wpa_printf(MSG_DEBUG, "Failed to add ACL cache entry"); 544 goto done; 545 } 546 os_get_reltime(&cache->timestamp); 547 os_memcpy(cache->addr, query->addr, sizeof(cache->addr)); 548 if (hdr->code == RADIUS_CODE_ACCESS_ACCEPT) { 549 u8 *buf; 550 size_t len; 551 552 if (radius_msg_get_attr_int32(msg, RADIUS_ATTR_SESSION_TIMEOUT, 553 &cache->session_timeout) == 0) 554 cache->accepted = HOSTAPD_ACL_ACCEPT_TIMEOUT; 555 else 556 cache->accepted = HOSTAPD_ACL_ACCEPT; 557 558 if (radius_msg_get_attr_int32( 559 msg, RADIUS_ATTR_ACCT_INTERIM_INTERVAL, 560 &cache->acct_interim_interval) == 0 && 561 cache->acct_interim_interval < 60) { 562 wpa_printf(MSG_DEBUG, "Ignored too small " 563 "Acct-Interim-Interval %d for STA " MACSTR, 564 cache->acct_interim_interval, 565 MAC2STR(query->addr)); 566 cache->acct_interim_interval = 0; 567 } 568 569 notempty = &cache->vlan_id.notempty; 570 untagged = &cache->vlan_id.untagged; 571 tagged = cache->vlan_id.tagged; 572 *notempty = !!radius_msg_get_vlanid(msg, untagged, 573 MAX_NUM_TAGGED_VLAN, 574 tagged); 575 576 decode_tunnel_passwords(hapd, shared_secret, shared_secret_len, 577 msg, req, cache); 578 579 if (radius_msg_get_attr_ptr(msg, RADIUS_ATTR_USER_NAME, 580 &buf, &len, NULL) == 0) { 581 cache->identity = os_zalloc(len + 1); 582 if (cache->identity) 583 os_memcpy(cache->identity, buf, len); 584 } 585 if (radius_msg_get_attr_ptr( 586 msg, RADIUS_ATTR_CHARGEABLE_USER_IDENTITY, 587 &buf, &len, NULL) == 0) { 588 cache->radius_cui = os_zalloc(len + 1); 589 if (cache->radius_cui) 590 os_memcpy(cache->radius_cui, buf, len); 591 } 592 593 if (hapd->conf->wpa_psk_radius == PSK_RADIUS_REQUIRED && 594 !cache->psk) 595 cache->accepted = HOSTAPD_ACL_REJECT; 596 597 if (cache->vlan_id.notempty && 598 !hostapd_vlan_valid(hapd->conf->vlan, &cache->vlan_id)) { 599 hostapd_logger(hapd, query->addr, 600 HOSTAPD_MODULE_RADIUS, 601 HOSTAPD_LEVEL_INFO, 602 "Invalid VLAN %d%s received from RADIUS server", 603 cache->vlan_id.untagged, 604 cache->vlan_id.tagged[0] ? "+" : ""); 605 os_memset(&cache->vlan_id, 0, sizeof(cache->vlan_id)); 606 } 607 if (hapd->conf->ssid.dynamic_vlan == DYNAMIC_VLAN_REQUIRED && 608 !cache->vlan_id.notempty) 609 cache->accepted = HOSTAPD_ACL_REJECT; 610 } else 611 cache->accepted = HOSTAPD_ACL_REJECT; 612 cache->next = hapd->acl_cache; 613 hapd->acl_cache = cache; 614 615 #ifdef CONFIG_DRIVER_RADIUS_ACL 616 hostapd_drv_set_radius_acl_auth(hapd, query->addr, cache->accepted, 617 cache->session_timeout); 618 #else /* CONFIG_DRIVER_RADIUS_ACL */ 619 #ifdef NEED_AP_MLME 620 /* Re-send original authentication frame for 802.11 processing */ 621 wpa_printf(MSG_DEBUG, "Re-sending authentication frame after " 622 "successful RADIUS ACL query"); 623 ieee802_11_mgmt(hapd, query->auth_msg, query->auth_msg_len, NULL); 624 #endif /* NEED_AP_MLME */ 625 #endif /* CONFIG_DRIVER_RADIUS_ACL */ 626 627 done: 628 if (prev == NULL) 629 hapd->acl_queries = query->next; 630 else 631 prev->next = query->next; 632 633 hostapd_acl_query_free(query); 634 635 return RADIUS_RX_PROCESSED; 636 } 637 #endif /* CONFIG_NO_RADIUS */ 638 639 640 /** 641 * hostapd_acl_init: Initialize IEEE 802.11 ACL 642 * @hapd: hostapd BSS data 643 * Returns: 0 on success, -1 on failure 644 */ 645 int hostapd_acl_init(struct hostapd_data *hapd) 646 { 647 #ifndef CONFIG_NO_RADIUS 648 if (radius_client_register(hapd->radius, RADIUS_AUTH, 649 hostapd_acl_recv_radius, hapd)) 650 return -1; 651 #endif /* CONFIG_NO_RADIUS */ 652 653 return 0; 654 } 655 656 657 /** 658 * hostapd_acl_deinit - Deinitialize IEEE 802.11 ACL 659 * @hapd: hostapd BSS data 660 */ 661 void hostapd_acl_deinit(struct hostapd_data *hapd) 662 { 663 struct hostapd_acl_query_data *query, *prev; 664 665 #ifndef CONFIG_NO_RADIUS 666 hostapd_acl_cache_free(hapd->acl_cache); 667 #endif /* CONFIG_NO_RADIUS */ 668 669 query = hapd->acl_queries; 670 while (query) { 671 prev = query; 672 query = query->next; 673 hostapd_acl_query_free(prev); 674 } 675 } 676 677 678 void hostapd_free_psk_list(struct hostapd_sta_wpa_psk_short *psk) 679 { 680 if (psk && psk->ref) { 681 /* This will be freed when the last reference is dropped. */ 682 psk->ref--; 683 return; 684 } 685 686 while (psk) { 687 struct hostapd_sta_wpa_psk_short *prev = psk; 688 psk = psk->next; 689 os_free(prev); 690 } 691 } 692
