ap_config.c revision 34af306c42b7ccf956508e7cd23f0ba90606e360
1/* 2 * hostapd / Configuration helper functions 3 * Copyright (c) 2003-2012, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "utils/includes.h" 10 11#include "utils/common.h" 12#include "crypto/sha1.h" 13#include "radius/radius_client.h" 14#include "common/ieee802_11_defs.h" 15#include "common/eapol_common.h" 16#include "eap_common/eap_wsc_common.h" 17#include "eap_server/eap.h" 18#include "wpa_auth.h" 19#include "sta_info.h" 20#include "ap_config.h" 21 22 23static void hostapd_config_free_vlan(struct hostapd_bss_config *bss) 24{ 25 struct hostapd_vlan *vlan, *prev; 26 27 vlan = bss->vlan; 28 prev = NULL; 29 while (vlan) { 30 prev = vlan; 31 vlan = vlan->next; 32 os_free(prev); 33 } 34 35 bss->vlan = NULL; 36} 37 38 39void hostapd_config_defaults_bss(struct hostapd_bss_config *bss) 40{ 41 bss->logger_syslog_level = HOSTAPD_LEVEL_INFO; 42 bss->logger_stdout_level = HOSTAPD_LEVEL_INFO; 43 bss->logger_syslog = (unsigned int) -1; 44 bss->logger_stdout = (unsigned int) -1; 45 46 bss->auth_algs = WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED; 47 48 bss->wep_rekeying_period = 300; 49 /* use key0 in individual key and key1 in broadcast key */ 50 bss->broadcast_key_idx_min = 1; 51 bss->broadcast_key_idx_max = 2; 52 bss->eap_reauth_period = 3600; 53 54 bss->wpa_group_rekey = 600; 55 bss->wpa_gmk_rekey = 86400; 56 bss->wpa_key_mgmt = WPA_KEY_MGMT_PSK; 57 bss->wpa_pairwise = WPA_CIPHER_TKIP; 58 bss->wpa_group = WPA_CIPHER_TKIP; 59 bss->rsn_pairwise = 0; 60 61 bss->max_num_sta = MAX_STA_COUNT; 62 63 bss->dtim_period = 2; 64 65 bss->radius_server_auth_port = 1812; 66 bss->ap_max_inactivity = AP_MAX_INACTIVITY; 67 bss->eapol_version = EAPOL_VERSION; 68 69 bss->max_listen_interval = 65535; 70 71 bss->pwd_group = 19; /* ECC: GF(p=256) */ 72 73#ifdef CONFIG_IEEE80211W 74 bss->assoc_sa_query_max_timeout = 1000; 75 bss->assoc_sa_query_retry_timeout = 201; 76#endif /* CONFIG_IEEE80211W */ 77#ifdef EAP_SERVER_FAST 78 /* both anonymous and authenticated provisioning */ 79 bss->eap_fast_prov = 3; 80 bss->pac_key_lifetime = 7 * 24 * 60 * 60; 81 bss->pac_key_refresh_time = 1 * 24 * 60 * 60; 82#endif /* EAP_SERVER_FAST */ 83 84 /* Set to -1 as defaults depends on HT in setup */ 85 bss->wmm_enabled = -1; 86 87#ifdef CONFIG_IEEE80211R 88 bss->ft_over_ds = 1; 89#endif /* CONFIG_IEEE80211R */ 90 91 bss->radius_das_time_window = 300; 92 93 bss->sae_anti_clogging_threshold = 5; 94} 95 96 97struct hostapd_config * hostapd_config_defaults(void) 98{ 99#define ecw2cw(ecw) ((1 << (ecw)) - 1) 100 101 struct hostapd_config *conf; 102 struct hostapd_bss_config *bss; 103 const int aCWmin = 4, aCWmax = 10; 104 const struct hostapd_wmm_ac_params ac_bk = 105 { aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */ 106 const struct hostapd_wmm_ac_params ac_be = 107 { aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */ 108 const struct hostapd_wmm_ac_params ac_vi = /* video traffic */ 109 { aCWmin - 1, aCWmin, 2, 3000 / 32, 0 }; 110 const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */ 111 { aCWmin - 2, aCWmin - 1, 2, 1500 / 32, 0 }; 112 const struct hostapd_tx_queue_params txq_bk = 113 { 7, ecw2cw(aCWmin), ecw2cw(aCWmax), 0 }; 114 const struct hostapd_tx_queue_params txq_be = 115 { 3, ecw2cw(aCWmin), 4 * (ecw2cw(aCWmin) + 1) - 1, 0}; 116 const struct hostapd_tx_queue_params txq_vi = 117 { 1, (ecw2cw(aCWmin) + 1) / 2 - 1, ecw2cw(aCWmin), 30}; 118 const struct hostapd_tx_queue_params txq_vo = 119 { 1, (ecw2cw(aCWmin) + 1) / 4 - 1, 120 (ecw2cw(aCWmin) + 1) / 2 - 1, 15}; 121 122#undef ecw2cw 123 124 conf = os_zalloc(sizeof(*conf)); 125 bss = os_zalloc(sizeof(*bss)); 126 if (conf == NULL || bss == NULL) { 127 wpa_printf(MSG_ERROR, "Failed to allocate memory for " 128 "configuration data."); 129 os_free(conf); 130 os_free(bss); 131 return NULL; 132 } 133 134 bss->radius = os_zalloc(sizeof(*bss->radius)); 135 if (bss->radius == NULL) { 136 os_free(conf); 137 os_free(bss); 138 return NULL; 139 } 140 141 hostapd_config_defaults_bss(bss); 142 143 conf->num_bss = 1; 144 conf->bss = bss; 145 146 conf->beacon_int = 100; 147 conf->rts_threshold = -1; /* use driver default: 2347 */ 148 conf->fragm_threshold = -1; /* user driver default: 2346 */ 149 conf->send_probe_response = 1; 150 151 conf->wmm_ac_params[0] = ac_be; 152 conf->wmm_ac_params[1] = ac_bk; 153 conf->wmm_ac_params[2] = ac_vi; 154 conf->wmm_ac_params[3] = ac_vo; 155 156 conf->tx_queue[0] = txq_vo; 157 conf->tx_queue[1] = txq_vi; 158 conf->tx_queue[2] = txq_be; 159 conf->tx_queue[3] = txq_bk; 160 161 conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED; 162 163 conf->ap_table_max_size = 255; 164 conf->ap_table_expiration_time = 60; 165 166#ifdef CONFIG_TESTING_OPTIONS 167 conf->ignore_probe_probability = 0.0d; 168 conf->ignore_auth_probability = 0.0d; 169 conf->ignore_assoc_probability = 0.0d; 170 conf->ignore_reassoc_probability = 0.0d; 171 conf->corrupt_gtk_rekey_mic_probability = 0.0d; 172#endif /* CONFIG_TESTING_OPTIONS */ 173 174 return conf; 175} 176 177 178int hostapd_mac_comp(const void *a, const void *b) 179{ 180 return os_memcmp(a, b, sizeof(macaddr)); 181} 182 183 184int hostapd_mac_comp_empty(const void *a) 185{ 186 macaddr empty = { 0 }; 187 return os_memcmp(a, empty, sizeof(macaddr)); 188} 189 190 191static int hostapd_config_read_wpa_psk(const char *fname, 192 struct hostapd_ssid *ssid) 193{ 194 FILE *f; 195 char buf[128], *pos; 196 int line = 0, ret = 0, len, ok; 197 u8 addr[ETH_ALEN]; 198 struct hostapd_wpa_psk *psk; 199 200 if (!fname) 201 return 0; 202 203 f = fopen(fname, "r"); 204 if (!f) { 205 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname); 206 return -1; 207 } 208 209 while (fgets(buf, sizeof(buf), f)) { 210 line++; 211 212 if (buf[0] == '#') 213 continue; 214 pos = buf; 215 while (*pos != '\0') { 216 if (*pos == '\n') { 217 *pos = '\0'; 218 break; 219 } 220 pos++; 221 } 222 if (buf[0] == '\0') 223 continue; 224 225 if (hwaddr_aton(buf, addr)) { 226 wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on " 227 "line %d in '%s'", buf, line, fname); 228 ret = -1; 229 break; 230 } 231 232 psk = os_zalloc(sizeof(*psk)); 233 if (psk == NULL) { 234 wpa_printf(MSG_ERROR, "WPA PSK allocation failed"); 235 ret = -1; 236 break; 237 } 238 if (is_zero_ether_addr(addr)) 239 psk->group = 1; 240 else 241 os_memcpy(psk->addr, addr, ETH_ALEN); 242 243 pos = buf + 17; 244 if (*pos == '\0') { 245 wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'", 246 line, fname); 247 os_free(psk); 248 ret = -1; 249 break; 250 } 251 pos++; 252 253 ok = 0; 254 len = os_strlen(pos); 255 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0) 256 ok = 1; 257 else if (len >= 8 && len < 64) { 258 pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len, 259 4096, psk->psk, PMK_LEN); 260 ok = 1; 261 } 262 if (!ok) { 263 wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in " 264 "'%s'", pos, line, fname); 265 os_free(psk); 266 ret = -1; 267 break; 268 } 269 270 psk->next = ssid->wpa_psk; 271 ssid->wpa_psk = psk; 272 } 273 274 fclose(f); 275 276 return ret; 277} 278 279 280static int hostapd_derive_psk(struct hostapd_ssid *ssid) 281{ 282 ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk)); 283 if (ssid->wpa_psk == NULL) { 284 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK"); 285 return -1; 286 } 287 wpa_hexdump_ascii(MSG_DEBUG, "SSID", 288 (u8 *) ssid->ssid, ssid->ssid_len); 289 wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)", 290 (u8 *) ssid->wpa_passphrase, 291 os_strlen(ssid->wpa_passphrase)); 292 pbkdf2_sha1(ssid->wpa_passphrase, 293 ssid->ssid, ssid->ssid_len, 294 4096, ssid->wpa_psk->psk, PMK_LEN); 295 wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)", 296 ssid->wpa_psk->psk, PMK_LEN); 297 return 0; 298} 299 300 301int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf) 302{ 303 struct hostapd_ssid *ssid = &conf->ssid; 304 305 if (ssid->wpa_passphrase != NULL) { 306 if (ssid->wpa_psk != NULL) { 307 wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK " 308 "instead of passphrase"); 309 } else { 310 wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on " 311 "passphrase"); 312 if (hostapd_derive_psk(ssid) < 0) 313 return -1; 314 } 315 ssid->wpa_psk->group = 1; 316 } 317 318 if (ssid->wpa_psk_file) { 319 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file, 320 &conf->ssid)) 321 return -1; 322 } 323 324 return 0; 325} 326 327 328int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b) 329{ 330 int i; 331 332 if (a->idx != b->idx || a->default_len != b->default_len) 333 return 1; 334 for (i = 0; i < NUM_WEP_KEYS; i++) 335 if (a->len[i] != b->len[i] || 336 os_memcmp(a->key[i], b->key[i], a->len[i]) != 0) 337 return 1; 338 return 0; 339} 340 341 342static void hostapd_config_free_radius(struct hostapd_radius_server *servers, 343 int num_servers) 344{ 345 int i; 346 347 for (i = 0; i < num_servers; i++) { 348 os_free(servers[i].shared_secret); 349 } 350 os_free(servers); 351} 352 353 354struct hostapd_radius_attr * 355hostapd_config_get_radius_attr(struct hostapd_radius_attr *attr, u8 type) 356{ 357 for (; attr; attr = attr->next) { 358 if (attr->type == type) 359 return attr; 360 } 361 return NULL; 362} 363 364 365static void hostapd_config_free_radius_attr(struct hostapd_radius_attr *attr) 366{ 367 struct hostapd_radius_attr *prev; 368 369 while (attr) { 370 prev = attr; 371 attr = attr->next; 372 wpabuf_free(prev->val); 373 os_free(prev); 374 } 375} 376 377 378static void hostapd_config_free_eap_user(struct hostapd_eap_user *user) 379{ 380 os_free(user->identity); 381 os_free(user->password); 382 os_free(user); 383} 384 385 386static void hostapd_config_free_wep(struct hostapd_wep_keys *keys) 387{ 388 int i; 389 for (i = 0; i < NUM_WEP_KEYS; i++) { 390 os_free(keys->key[i]); 391 keys->key[i] = NULL; 392 } 393} 394 395 396static void hostapd_config_free_bss(struct hostapd_bss_config *conf) 397{ 398 struct hostapd_wpa_psk *psk, *prev; 399 struct hostapd_eap_user *user, *prev_user; 400 401 if (conf == NULL) 402 return; 403 404 psk = conf->ssid.wpa_psk; 405 while (psk) { 406 prev = psk; 407 psk = psk->next; 408 os_free(prev); 409 } 410 411 os_free(conf->ssid.wpa_passphrase); 412 os_free(conf->ssid.wpa_psk_file); 413 hostapd_config_free_wep(&conf->ssid.wep); 414#ifdef CONFIG_FULL_DYNAMIC_VLAN 415 os_free(conf->ssid.vlan_tagged_interface); 416#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 417 418 user = conf->eap_user; 419 while (user) { 420 prev_user = user; 421 user = user->next; 422 hostapd_config_free_eap_user(prev_user); 423 } 424 os_free(conf->eap_user_sqlite); 425 426 os_free(conf->dump_log_name); 427 os_free(conf->eap_req_id_text); 428 os_free(conf->accept_mac); 429 os_free(conf->deny_mac); 430 os_free(conf->nas_identifier); 431 hostapd_config_free_radius(conf->radius->auth_servers, 432 conf->radius->num_auth_servers); 433 hostapd_config_free_radius(conf->radius->acct_servers, 434 conf->radius->num_acct_servers); 435 hostapd_config_free_radius_attr(conf->radius_auth_req_attr); 436 hostapd_config_free_radius_attr(conf->radius_acct_req_attr); 437 os_free(conf->rsn_preauth_interfaces); 438 os_free(conf->ctrl_interface); 439 os_free(conf->ca_cert); 440 os_free(conf->server_cert); 441 os_free(conf->private_key); 442 os_free(conf->private_key_passwd); 443 os_free(conf->ocsp_stapling_response); 444 os_free(conf->dh_file); 445 os_free(conf->pac_opaque_encr_key); 446 os_free(conf->eap_fast_a_id); 447 os_free(conf->eap_fast_a_id_info); 448 os_free(conf->eap_sim_db); 449 os_free(conf->radius_server_clients); 450 os_free(conf->test_socket); 451 os_free(conf->radius); 452 os_free(conf->radius_das_shared_secret); 453 hostapd_config_free_vlan(conf); 454 if (conf->ssid.dyn_vlan_keys) { 455 struct hostapd_ssid *ssid = &conf->ssid; 456 size_t i; 457 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) { 458 if (ssid->dyn_vlan_keys[i] == NULL) 459 continue; 460 hostapd_config_free_wep(ssid->dyn_vlan_keys[i]); 461 os_free(ssid->dyn_vlan_keys[i]); 462 } 463 os_free(ssid->dyn_vlan_keys); 464 ssid->dyn_vlan_keys = NULL; 465 } 466 467 os_free(conf->time_zone); 468 469#ifdef CONFIG_IEEE80211R 470 { 471 struct ft_remote_r0kh *r0kh, *r0kh_prev; 472 struct ft_remote_r1kh *r1kh, *r1kh_prev; 473 474 r0kh = conf->r0kh_list; 475 conf->r0kh_list = NULL; 476 while (r0kh) { 477 r0kh_prev = r0kh; 478 r0kh = r0kh->next; 479 os_free(r0kh_prev); 480 } 481 482 r1kh = conf->r1kh_list; 483 conf->r1kh_list = NULL; 484 while (r1kh) { 485 r1kh_prev = r1kh; 486 r1kh = r1kh->next; 487 os_free(r1kh_prev); 488 } 489 } 490#endif /* CONFIG_IEEE80211R */ 491 492#ifdef CONFIG_WPS 493 os_free(conf->wps_pin_requests); 494 os_free(conf->device_name); 495 os_free(conf->manufacturer); 496 os_free(conf->model_name); 497 os_free(conf->model_number); 498 os_free(conf->serial_number); 499 os_free(conf->config_methods); 500 os_free(conf->ap_pin); 501 os_free(conf->extra_cred); 502 os_free(conf->ap_settings); 503 os_free(conf->upnp_iface); 504 os_free(conf->friendly_name); 505 os_free(conf->manufacturer_url); 506 os_free(conf->model_description); 507 os_free(conf->model_url); 508 os_free(conf->upc); 509 wpabuf_free(conf->wps_nfc_dh_pubkey); 510 wpabuf_free(conf->wps_nfc_dh_privkey); 511 wpabuf_free(conf->wps_nfc_dev_pw); 512#endif /* CONFIG_WPS */ 513 514 os_free(conf->roaming_consortium); 515 os_free(conf->venue_name); 516 os_free(conf->nai_realm_data); 517 os_free(conf->network_auth_type); 518 os_free(conf->anqp_3gpp_cell_net); 519 os_free(conf->domain_name); 520 521#ifdef CONFIG_RADIUS_TEST 522 os_free(conf->dump_msk_file); 523#endif /* CONFIG_RADIUS_TEST */ 524 525#ifdef CONFIG_HS20 526 os_free(conf->hs20_oper_friendly_name); 527 os_free(conf->hs20_wan_metrics); 528 os_free(conf->hs20_connection_capability); 529 os_free(conf->hs20_operating_class); 530#endif /* CONFIG_HS20 */ 531 532 wpabuf_free(conf->vendor_elements); 533 534 os_free(conf->sae_groups); 535 536 os_free(conf->server_id); 537} 538 539 540/** 541 * hostapd_config_free - Free hostapd configuration 542 * @conf: Configuration data from hostapd_config_read(). 543 */ 544void hostapd_config_free(struct hostapd_config *conf) 545{ 546 size_t i; 547 548 if (conf == NULL) 549 return; 550 551 for (i = 0; i < conf->num_bss; i++) 552 hostapd_config_free_bss(&conf->bss[i]); 553 os_free(conf->bss); 554 os_free(conf->supported_rates); 555 os_free(conf->basic_rates); 556 557 os_free(conf); 558} 559 560 561/** 562 * hostapd_maclist_found - Find a MAC address from a list 563 * @list: MAC address list 564 * @num_entries: Number of addresses in the list 565 * @addr: Address to search for 566 * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed 567 * Returns: 1 if address is in the list or 0 if not. 568 * 569 * Perform a binary search for given MAC address from a pre-sorted list. 570 */ 571int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries, 572 const u8 *addr, int *vlan_id) 573{ 574 int start, end, middle, res; 575 576 start = 0; 577 end = num_entries - 1; 578 579 while (start <= end) { 580 middle = (start + end) / 2; 581 res = os_memcmp(list[middle].addr, addr, ETH_ALEN); 582 if (res == 0) { 583 if (vlan_id) 584 *vlan_id = list[middle].vlan_id; 585 return 1; 586 } 587 if (res < 0) 588 start = middle + 1; 589 else 590 end = middle - 1; 591 } 592 593 return 0; 594} 595 596 597int hostapd_rate_found(int *list, int rate) 598{ 599 int i; 600 601 if (list == NULL) 602 return 0; 603 604 for (i = 0; list[i] >= 0; i++) 605 if (list[i] == rate) 606 return 1; 607 608 return 0; 609} 610 611 612int hostapd_vlan_id_valid(struct hostapd_vlan *vlan, int vlan_id) 613{ 614 struct hostapd_vlan *v = vlan; 615 while (v) { 616 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD) 617 return 1; 618 v = v->next; 619 } 620 return 0; 621} 622 623 624const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id) 625{ 626 struct hostapd_vlan *v = vlan; 627 while (v) { 628 if (v->vlan_id == vlan_id) 629 return v->ifname; 630 v = v->next; 631 } 632 return NULL; 633} 634 635 636const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf, 637 const u8 *addr, const u8 *prev_psk) 638{ 639 struct hostapd_wpa_psk *psk; 640 int next_ok = prev_psk == NULL; 641 642 for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) { 643 if (next_ok && 644 (psk->group || os_memcmp(psk->addr, addr, ETH_ALEN) == 0)) 645 return psk->psk; 646 647 if (psk->psk == prev_psk) 648 next_ok = 1; 649 } 650 651 return NULL; 652} 653