ap_config.c revision 61d9df3e62aaa0e87ad05452fcb95142159a17b6
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 94 95struct hostapd_config * hostapd_config_defaults(void) 96{ 97#define ecw2cw(ecw) ((1 << (ecw)) - 1) 98 99 struct hostapd_config *conf; 100 struct hostapd_bss_config *bss; 101 const int aCWmin = 4, aCWmax = 10; 102 const struct hostapd_wmm_ac_params ac_bk = 103 { aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */ 104 const struct hostapd_wmm_ac_params ac_be = 105 { aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */ 106 const struct hostapd_wmm_ac_params ac_vi = /* video traffic */ 107 { aCWmin - 1, aCWmin, 2, 3000 / 32, 0 }; 108 const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */ 109 { aCWmin - 2, aCWmin - 1, 2, 1500 / 32, 0 }; 110 const struct hostapd_tx_queue_params txq_bk = 111 { 7, ecw2cw(aCWmin), ecw2cw(aCWmax), 0 }; 112 const struct hostapd_tx_queue_params txq_be = 113 { 3, ecw2cw(aCWmin), 4 * (ecw2cw(aCWmin) + 1) - 1, 0}; 114 const struct hostapd_tx_queue_params txq_vi = 115 { 1, (ecw2cw(aCWmin) + 1) / 2 - 1, ecw2cw(aCWmin), 30}; 116 const struct hostapd_tx_queue_params txq_vo = 117 { 1, (ecw2cw(aCWmin) + 1) / 4 - 1, 118 (ecw2cw(aCWmin) + 1) / 2 - 1, 15}; 119 120#undef ecw2cw 121 122 conf = os_zalloc(sizeof(*conf)); 123 bss = os_zalloc(sizeof(*bss)); 124 if (conf == NULL || bss == NULL) { 125 wpa_printf(MSG_ERROR, "Failed to allocate memory for " 126 "configuration data."); 127 os_free(conf); 128 os_free(bss); 129 return NULL; 130 } 131 132 bss->radius = os_zalloc(sizeof(*bss->radius)); 133 if (bss->radius == NULL) { 134 os_free(conf); 135 os_free(bss); 136 return NULL; 137 } 138 139 hostapd_config_defaults_bss(bss); 140 141 conf->num_bss = 1; 142 conf->bss = bss; 143 144 conf->beacon_int = 100; 145 conf->rts_threshold = -1; /* use driver default: 2347 */ 146 conf->fragm_threshold = -1; /* user driver default: 2346 */ 147 conf->send_probe_response = 1; 148 149 conf->wmm_ac_params[0] = ac_be; 150 conf->wmm_ac_params[1] = ac_bk; 151 conf->wmm_ac_params[2] = ac_vi; 152 conf->wmm_ac_params[3] = ac_vo; 153 154 conf->tx_queue[0] = txq_vo; 155 conf->tx_queue[1] = txq_vi; 156 conf->tx_queue[2] = txq_be; 157 conf->tx_queue[3] = txq_bk; 158 159 conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED; 160 161#ifdef ANDROID_QCOM_WCN 162 conf->ieee80211n = 1; 163 164 /* Enable ieee80211d and set US as default country */ 165 conf->ieee80211d = 1; 166 os_memcpy(conf->country, "US ", 3); 167#endif 168 169 return conf; 170} 171 172 173int hostapd_mac_comp(const void *a, const void *b) 174{ 175 return os_memcmp(a, b, sizeof(macaddr)); 176} 177 178 179int hostapd_mac_comp_empty(const void *a) 180{ 181 macaddr empty = { 0 }; 182 return os_memcmp(a, empty, sizeof(macaddr)); 183} 184 185 186static int hostapd_config_read_wpa_psk(const char *fname, 187 struct hostapd_ssid *ssid) 188{ 189 FILE *f; 190 char buf[128], *pos; 191 int line = 0, ret = 0, len, ok; 192 u8 addr[ETH_ALEN]; 193 struct hostapd_wpa_psk *psk; 194 195 if (!fname) 196 return 0; 197 198 f = fopen(fname, "r"); 199 if (!f) { 200 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname); 201 return -1; 202 } 203 204 while (fgets(buf, sizeof(buf), f)) { 205 line++; 206 207 if (buf[0] == '#') 208 continue; 209 pos = buf; 210 while (*pos != '\0') { 211 if (*pos == '\n') { 212 *pos = '\0'; 213 break; 214 } 215 pos++; 216 } 217 if (buf[0] == '\0') 218 continue; 219 220 if (hwaddr_aton(buf, addr)) { 221 wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on " 222 "line %d in '%s'", buf, line, fname); 223 ret = -1; 224 break; 225 } 226 227 psk = os_zalloc(sizeof(*psk)); 228 if (psk == NULL) { 229 wpa_printf(MSG_ERROR, "WPA PSK allocation failed"); 230 ret = -1; 231 break; 232 } 233 if (is_zero_ether_addr(addr)) 234 psk->group = 1; 235 else 236 os_memcpy(psk->addr, addr, ETH_ALEN); 237 238 pos = buf + 17; 239 if (*pos == '\0') { 240 wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'", 241 line, fname); 242 os_free(psk); 243 ret = -1; 244 break; 245 } 246 pos++; 247 248 ok = 0; 249 len = os_strlen(pos); 250 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0) 251 ok = 1; 252 else if (len >= 8 && len < 64) { 253 pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len, 254 4096, psk->psk, PMK_LEN); 255 ok = 1; 256 } 257 if (!ok) { 258 wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in " 259 "'%s'", pos, line, fname); 260 os_free(psk); 261 ret = -1; 262 break; 263 } 264 265 psk->next = ssid->wpa_psk; 266 ssid->wpa_psk = psk; 267 } 268 269 fclose(f); 270 271 return ret; 272} 273 274 275static int hostapd_derive_psk(struct hostapd_ssid *ssid) 276{ 277 ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk)); 278 if (ssid->wpa_psk == NULL) { 279 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK"); 280 return -1; 281 } 282 wpa_hexdump_ascii(MSG_DEBUG, "SSID", 283 (u8 *) ssid->ssid, ssid->ssid_len); 284 wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)", 285 (u8 *) ssid->wpa_passphrase, 286 os_strlen(ssid->wpa_passphrase)); 287 pbkdf2_sha1(ssid->wpa_passphrase, 288 ssid->ssid, ssid->ssid_len, 289 4096, ssid->wpa_psk->psk, PMK_LEN); 290 wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)", 291 ssid->wpa_psk->psk, PMK_LEN); 292 return 0; 293} 294 295 296int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf) 297{ 298 struct hostapd_ssid *ssid = &conf->ssid; 299 300 if (ssid->wpa_passphrase != NULL) { 301 if (ssid->wpa_psk != NULL) { 302 wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK " 303 "instead of passphrase"); 304 } else { 305 wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on " 306 "passphrase"); 307 if (hostapd_derive_psk(ssid) < 0) 308 return -1; 309 } 310 ssid->wpa_psk->group = 1; 311 } 312 313 if (ssid->wpa_psk_file) { 314 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file, 315 &conf->ssid)) 316 return -1; 317 } 318 319 return 0; 320} 321 322 323int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b) 324{ 325 int i; 326 327 if (a->idx != b->idx || a->default_len != b->default_len) 328 return 1; 329 for (i = 0; i < NUM_WEP_KEYS; i++) 330 if (a->len[i] != b->len[i] || 331 os_memcmp(a->key[i], b->key[i], a->len[i]) != 0) 332 return 1; 333 return 0; 334} 335 336 337static void hostapd_config_free_radius(struct hostapd_radius_server *servers, 338 int num_servers) 339{ 340 int i; 341 342 for (i = 0; i < num_servers; i++) { 343 os_free(servers[i].shared_secret); 344 } 345 os_free(servers); 346} 347 348 349struct hostapd_radius_attr * 350hostapd_config_get_radius_attr(struct hostapd_radius_attr *attr, u8 type) 351{ 352 for (; attr; attr = attr->next) { 353 if (attr->type == type) 354 return attr; 355 } 356 return NULL; 357} 358 359 360static void hostapd_config_free_radius_attr(struct hostapd_radius_attr *attr) 361{ 362 struct hostapd_radius_attr *prev; 363 364 while (attr) { 365 prev = attr; 366 attr = attr->next; 367 wpabuf_free(prev->val); 368 os_free(prev); 369 } 370} 371 372 373static void hostapd_config_free_eap_user(struct hostapd_eap_user *user) 374{ 375 os_free(user->identity); 376 os_free(user->password); 377 os_free(user); 378} 379 380 381static void hostapd_config_free_wep(struct hostapd_wep_keys *keys) 382{ 383 int i; 384 for (i = 0; i < NUM_WEP_KEYS; i++) { 385 os_free(keys->key[i]); 386 keys->key[i] = NULL; 387 } 388} 389 390 391static void hostapd_config_free_bss(struct hostapd_bss_config *conf) 392{ 393 struct hostapd_wpa_psk *psk, *prev; 394 struct hostapd_eap_user *user, *prev_user; 395 396 if (conf == NULL) 397 return; 398 399 psk = conf->ssid.wpa_psk; 400 while (psk) { 401 prev = psk; 402 psk = psk->next; 403 os_free(prev); 404 } 405 406 os_free(conf->ssid.wpa_passphrase); 407 os_free(conf->ssid.wpa_psk_file); 408 hostapd_config_free_wep(&conf->ssid.wep); 409#ifdef CONFIG_FULL_DYNAMIC_VLAN 410 os_free(conf->ssid.vlan_tagged_interface); 411#endif /* CONFIG_FULL_DYNAMIC_VLAN */ 412 413 user = conf->eap_user; 414 while (user) { 415 prev_user = user; 416 user = user->next; 417 hostapd_config_free_eap_user(prev_user); 418 } 419 420 os_free(conf->dump_log_name); 421 os_free(conf->eap_req_id_text); 422 os_free(conf->accept_mac); 423 os_free(conf->deny_mac); 424 os_free(conf->nas_identifier); 425 hostapd_config_free_radius(conf->radius->auth_servers, 426 conf->radius->num_auth_servers); 427 hostapd_config_free_radius(conf->radius->acct_servers, 428 conf->radius->num_acct_servers); 429 hostapd_config_free_radius_attr(conf->radius_auth_req_attr); 430 hostapd_config_free_radius_attr(conf->radius_acct_req_attr); 431 os_free(conf->rsn_preauth_interfaces); 432 os_free(conf->ctrl_interface); 433 os_free(conf->ca_cert); 434 os_free(conf->server_cert); 435 os_free(conf->private_key); 436 os_free(conf->private_key_passwd); 437 os_free(conf->dh_file); 438 os_free(conf->pac_opaque_encr_key); 439 os_free(conf->eap_fast_a_id); 440 os_free(conf->eap_fast_a_id_info); 441 os_free(conf->eap_sim_db); 442 os_free(conf->radius_server_clients); 443 os_free(conf->test_socket); 444 os_free(conf->radius); 445 os_free(conf->radius_das_shared_secret); 446 hostapd_config_free_vlan(conf); 447 if (conf->ssid.dyn_vlan_keys) { 448 struct hostapd_ssid *ssid = &conf->ssid; 449 size_t i; 450 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) { 451 if (ssid->dyn_vlan_keys[i] == NULL) 452 continue; 453 hostapd_config_free_wep(ssid->dyn_vlan_keys[i]); 454 os_free(ssid->dyn_vlan_keys[i]); 455 } 456 os_free(ssid->dyn_vlan_keys); 457 ssid->dyn_vlan_keys = NULL; 458 } 459 460 os_free(conf->time_zone); 461 462#ifdef CONFIG_IEEE80211R 463 { 464 struct ft_remote_r0kh *r0kh, *r0kh_prev; 465 struct ft_remote_r1kh *r1kh, *r1kh_prev; 466 467 r0kh = conf->r0kh_list; 468 conf->r0kh_list = NULL; 469 while (r0kh) { 470 r0kh_prev = r0kh; 471 r0kh = r0kh->next; 472 os_free(r0kh_prev); 473 } 474 475 r1kh = conf->r1kh_list; 476 conf->r1kh_list = NULL; 477 while (r1kh) { 478 r1kh_prev = r1kh; 479 r1kh = r1kh->next; 480 os_free(r1kh_prev); 481 } 482 } 483#endif /* CONFIG_IEEE80211R */ 484 485#ifdef CONFIG_WPS 486 os_free(conf->wps_pin_requests); 487 os_free(conf->device_name); 488 os_free(conf->manufacturer); 489 os_free(conf->model_name); 490 os_free(conf->model_number); 491 os_free(conf->serial_number); 492 os_free(conf->config_methods); 493 os_free(conf->ap_pin); 494 os_free(conf->extra_cred); 495 os_free(conf->ap_settings); 496 os_free(conf->upnp_iface); 497 os_free(conf->friendly_name); 498 os_free(conf->manufacturer_url); 499 os_free(conf->model_description); 500 os_free(conf->model_url); 501 os_free(conf->upc); 502 wpabuf_free(conf->wps_nfc_dh_pubkey); 503 wpabuf_free(conf->wps_nfc_dh_privkey); 504 wpabuf_free(conf->wps_nfc_dev_pw); 505#endif /* CONFIG_WPS */ 506 507 os_free(conf->roaming_consortium); 508 os_free(conf->venue_name); 509 os_free(conf->nai_realm_data); 510 os_free(conf->network_auth_type); 511 os_free(conf->anqp_3gpp_cell_net); 512 os_free(conf->domain_name); 513 514#ifdef CONFIG_RADIUS_TEST 515 os_free(conf->dump_msk_file); 516#endif /* CONFIG_RADIUS_TEST */ 517 518#ifdef CONFIG_HS20 519 os_free(conf->hs20_oper_friendly_name); 520 os_free(conf->hs20_wan_metrics); 521 os_free(conf->hs20_connection_capability); 522 os_free(conf->hs20_operating_class); 523#endif /* CONFIG_HS20 */ 524 525 wpabuf_free(conf->vendor_elements); 526} 527 528 529/** 530 * hostapd_config_free - Free hostapd configuration 531 * @conf: Configuration data from hostapd_config_read(). 532 */ 533void hostapd_config_free(struct hostapd_config *conf) 534{ 535 size_t i; 536 537 if (conf == NULL) 538 return; 539 540 for (i = 0; i < conf->num_bss; i++) 541 hostapd_config_free_bss(&conf->bss[i]); 542 os_free(conf->bss); 543 os_free(conf->supported_rates); 544 os_free(conf->basic_rates); 545 546 os_free(conf); 547} 548 549 550/** 551 * hostapd_maclist_found - Find a MAC address from a list 552 * @list: MAC address list 553 * @num_entries: Number of addresses in the list 554 * @addr: Address to search for 555 * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed 556 * Returns: 1 if address is in the list or 0 if not. 557 * 558 * Perform a binary search for given MAC address from a pre-sorted list. 559 */ 560int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries, 561 const u8 *addr, int *vlan_id) 562{ 563 int start, end, middle, res; 564 565 start = 0; 566 end = num_entries - 1; 567 568 while (start <= end) { 569 middle = (start + end) / 2; 570 res = os_memcmp(list[middle].addr, addr, ETH_ALEN); 571 if (res == 0) { 572 if (vlan_id) 573 *vlan_id = list[middle].vlan_id; 574 return 1; 575 } 576 if (res < 0) 577 start = middle + 1; 578 else 579 end = middle - 1; 580 } 581 582 return 0; 583} 584 585 586int hostapd_rate_found(int *list, int rate) 587{ 588 int i; 589 590 if (list == NULL) 591 return 0; 592 593 for (i = 0; list[i] >= 0; i++) 594 if (list[i] == rate) 595 return 1; 596 597 return 0; 598} 599 600 601const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id) 602{ 603 struct hostapd_vlan *v = vlan; 604 while (v) { 605 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD) 606 return v->ifname; 607 v = v->next; 608 } 609 return NULL; 610} 611 612 613const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf, 614 const u8 *addr, const u8 *prev_psk) 615{ 616 struct hostapd_wpa_psk *psk; 617 int next_ok = prev_psk == NULL; 618 619 for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) { 620 if (next_ok && 621 (psk->group || os_memcmp(psk->addr, addr, ETH_ALEN) == 0)) 622 return psk->psk; 623 624 if (psk->psk == prev_psk) 625 next_ok = 1; 626 } 627 628 return NULL; 629} 630 631 632const struct hostapd_eap_user * 633hostapd_get_eap_user(const struct hostapd_bss_config *conf, const u8 *identity, 634 size_t identity_len, int phase2) 635{ 636 struct hostapd_eap_user *user = conf->eap_user; 637 638#ifdef CONFIG_WPS 639 if (conf->wps_state && identity_len == WSC_ID_ENROLLEE_LEN && 640 os_memcmp(identity, WSC_ID_ENROLLEE, WSC_ID_ENROLLEE_LEN) == 0) { 641 static struct hostapd_eap_user wsc_enrollee; 642 os_memset(&wsc_enrollee, 0, sizeof(wsc_enrollee)); 643 wsc_enrollee.methods[0].method = eap_server_get_type( 644 "WSC", &wsc_enrollee.methods[0].vendor); 645 return &wsc_enrollee; 646 } 647 648 if (conf->wps_state && identity_len == WSC_ID_REGISTRAR_LEN && 649 os_memcmp(identity, WSC_ID_REGISTRAR, WSC_ID_REGISTRAR_LEN) == 0) { 650 static struct hostapd_eap_user wsc_registrar; 651 os_memset(&wsc_registrar, 0, sizeof(wsc_registrar)); 652 wsc_registrar.methods[0].method = eap_server_get_type( 653 "WSC", &wsc_registrar.methods[0].vendor); 654 wsc_registrar.password = (u8 *) conf->ap_pin; 655 wsc_registrar.password_len = conf->ap_pin ? 656 os_strlen(conf->ap_pin) : 0; 657 return &wsc_registrar; 658 } 659#endif /* CONFIG_WPS */ 660 661 while (user) { 662 if (!phase2 && user->identity == NULL) { 663 /* Wildcard match */ 664 break; 665 } 666 667 if (user->phase2 == !!phase2 && user->wildcard_prefix && 668 identity_len >= user->identity_len && 669 os_memcmp(user->identity, identity, user->identity_len) == 670 0) { 671 /* Wildcard prefix match */ 672 break; 673 } 674 675 if (user->phase2 == !!phase2 && 676 user->identity_len == identity_len && 677 os_memcmp(user->identity, identity, identity_len) == 0) 678 break; 679 user = user->next; 680 } 681 682 return user; 683} 684