src/ap/ap_config.c

   1 /*
   2  * hostapd / Configuration helper functions
   3  * Copyright (c) 2003-2014, 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
  23 static 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
  39 void 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         bss->group_mgmt_cipher = WPA_CIPHER_AES_128_CMAC;
  77 #endif /* CONFIG_IEEE80211W */
  78 #ifdef EAP_SERVER_FAST
  79          /* both anonymous and authenticated provisioning */
  80         bss->eap_fast_prov = 3;
  81         bss->pac_key_lifetime = 7 * 24 * 60 * 60;
  82         bss->pac_key_refresh_time = 1 * 24 * 60 * 60;
  83 #endif /* EAP_SERVER_FAST */
  84
  85         /* Set to -1 as defaults depends on HT in setup */
  86         bss->wmm_enabled = -1;
  87
  88 #ifdef CONFIG_IEEE80211R
  89         bss->ft_over_ds = 1;
  90 #endif /* CONFIG_IEEE80211R */
  91
  92         bss->radius_das_time_window = 300;
  93
  94         bss->sae_anti_clogging_threshold = 5;
  95 }
  96
  97
  98 struct hostapd_config * hostapd_config_defaults(void)
  99 {
 100 #define ecw2cw(ecw) ((1 << (ecw)) - 1)
 101
 102         struct hostapd_config *conf;
 103         struct hostapd_bss_config *bss;
 104         const int aCWmin = 4, aCWmax = 10;
 105         const struct hostapd_wmm_ac_params ac_bk =
 106                 { aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */
 107         const struct hostapd_wmm_ac_params ac_be =
 108                 { aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */
 109         const struct hostapd_wmm_ac_params ac_vi = /* video traffic */
 110                 { aCWmin - 1, aCWmin, 2, 3008 / 32, 0 };
 111         const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */
 112                 { aCWmin - 2, aCWmin - 1, 2, 1504 / 32, 0 };
 113         const struct hostapd_tx_queue_params txq_bk =
 114                 { 7, ecw2cw(aCWmin), ecw2cw(aCWmax), 0 };
 115         const struct hostapd_tx_queue_params txq_be =
 116                 { 3, ecw2cw(aCWmin), 4 * (ecw2cw(aCWmin) + 1) - 1, 0};
 117         const struct hostapd_tx_queue_params txq_vi =
 118                 { 1, (ecw2cw(aCWmin) + 1) / 2 - 1, ecw2cw(aCWmin), 30};
 119         const struct hostapd_tx_queue_params txq_vo =
 120                 { 1, (ecw2cw(aCWmin) + 1) / 4 - 1,
 121                   (ecw2cw(aCWmin) + 1) / 2 - 1, 15};
 122
 123 #undef ecw2cw
 124
 125         conf = os_zalloc(sizeof(*conf));
 126         bss = os_zalloc(sizeof(*bss));
 127         if (conf == NULL || bss == NULL) {
 128                 wpa_printf(MSG_ERROR, "Failed to allocate memory for "
 129                            "configuration data.");
 130                 os_free(conf);
 131                 os_free(bss);
 132                 return NULL;
 133         }
 134         conf->bss = os_calloc(1, sizeof(struct hostapd_bss_config *));
 135         if (conf->bss == NULL) {
 136                 os_free(conf);
 137                 os_free(bss);
 138                 return NULL;
 139         }
 140         conf->bss[0] = bss;
 141
 142         bss->radius = os_zalloc(sizeof(*bss->radius));
 143         if (bss->radius == NULL) {
 144                 os_free(conf->bss);
 145                 os_free(conf);
 146                 os_free(bss);
 147                 return NULL;
 148         }
 149
 150         hostapd_config_defaults_bss(bss);
 151
 152         conf->num_bss = 1;
 153
 154         conf->beacon_int = 100;
 155         conf->rts_threshold = -1; /* use driver default: 2347 */
 156         conf->fragm_threshold = -1; /* user driver default: 2346 */
 157         conf->send_probe_response = 1;
 158         /* Set to invalid value means do not add Power Constraint IE */
 159         conf->local_pwr_constraint = -1;
 160
 161         conf->wmm_ac_params[0] = ac_be;
 162         conf->wmm_ac_params[1] = ac_bk;
 163         conf->wmm_ac_params[2] = ac_vi;
 164         conf->wmm_ac_params[3] = ac_vo;
 165
 166         conf->tx_queue[0] = txq_vo;
 167         conf->tx_queue[1] = txq_vi;
 168         conf->tx_queue[2] = txq_be;
 169         conf->tx_queue[3] = txq_bk;
 170
 171         conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED;
 172
 173         conf->ap_table_max_size = 255;
 174         conf->ap_table_expiration_time = 60;
 175         conf->track_sta_max_age = 180;
 176
 177 #ifdef CONFIG_TESTING_OPTIONS
 178         conf->ignore_probe_probability = 0.0;
 179         conf->ignore_auth_probability = 0.0;
 180         conf->ignore_assoc_probability = 0.0;
 181         conf->ignore_reassoc_probability = 0.0;
 182         conf->corrupt_gtk_rekey_mic_probability = 0.0;
 183         conf->ecsa_ie_only = 0;
 184 #endif /* CONFIG_TESTING_OPTIONS */
 185
 186         conf->acs = 0;
 187         conf->acs_ch_list.num = 0;
 188 #ifdef CONFIG_ACS
 189         conf->acs_num_scans = 5;
 190 #endif /* CONFIG_ACS */
 191
 192         return conf;
 193 }
 194
 195
 196 int hostapd_mac_comp(const void *a, const void *b)
 197 {
 198         return os_memcmp(a, b, sizeof(macaddr));
 199 }
 200
 201
 202 int hostapd_mac_comp_empty(const void *a)
 203 {
 204         macaddr empty = { 0 };
 205         return os_memcmp(a, empty, sizeof(macaddr));
 206 }
 207
 208
 209 static int hostapd_config_read_wpa_psk(const char *fname,
 210                                        struct hostapd_ssid *ssid)
 211 {
 212         FILE *f;
 213         char buf[128], *pos;
 214         int line = 0, ret = 0, len, ok;
 215         u8 addr[ETH_ALEN];
 216         struct hostapd_wpa_psk *psk;
 217
 218         if (!fname)
 219                 return 0;
 220
 221         f = fopen(fname, "r");
 222         if (!f) {
 223                 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname);
 224                 return -1;
 225         }
 226
 227         while (fgets(buf, sizeof(buf), f)) {
 228                 line++;
 229
 230                 if (buf[0] == '#')
 231                         continue;
 232                 pos = buf;
 233                 while (*pos != '\0') {
 234                         if (*pos == '\n') {
 235                                 *pos = '\0';
 236                                 break;
 237                         }
 238                         pos++;
 239                 }
 240                 if (buf[0] == '\0')
 241                         continue;
 242
 243                 if (hwaddr_aton(buf, addr)) {
 244                         wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on "
 245                                    "line %d in '%s'", buf, line, fname);
 246                         ret = -1;
 247                         break;
 248                 }
 249
 250                 psk = os_zalloc(sizeof(*psk));
 251                 if (psk == NULL) {
 252                         wpa_printf(MSG_ERROR, "WPA PSK allocation failed");
 253                         ret = -1;
 254                         break;
 255                 }
 256                 if (is_zero_ether_addr(addr))
 257                         psk->group = 1;
 258                 else
 259                         os_memcpy(psk->addr, addr, ETH_ALEN);
 260
 261                 pos = buf + 17;
 262                 if (*pos == '\0') {
 263                         wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'",
 264                                    line, fname);
 265                         os_free(psk);
 266                         ret = -1;
 267                         break;
 268                 }
 269                 pos++;
 270
 271                 ok = 0;
 272                 len = os_strlen(pos);
 273                 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0)
 274                         ok = 1;
 275                 else if (len >= 8 && len < 64) {
 276                         pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len,
 277                                     4096, psk->psk, PMK_LEN);
 278                         ok = 1;
 279                 }
 280                 if (!ok) {
 281                         wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in "
 282                                    "'%s'", pos, line, fname);
 283                         os_free(psk);
 284                         ret = -1;
 285                         break;
 286                 }
 287
 288                 psk->next = ssid->wpa_psk;
 289                 ssid->wpa_psk = psk;
 290         }
 291
 292         fclose(f);
 293
 294         return ret;
 295 }
 296
 297
 298 static int hostapd_derive_psk(struct hostapd_ssid *ssid)
 299 {
 300         ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 301         if (ssid->wpa_psk == NULL) {
 302                 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK");
 303                 return -1;
 304         }
 305         wpa_hexdump_ascii(MSG_DEBUG, "SSID",
 306                           (u8 *) ssid->ssid, ssid->ssid_len);
 307         wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)",
 308                               (u8 *) ssid->wpa_passphrase,
 309                               os_strlen(ssid->wpa_passphrase));
 310         pbkdf2_sha1(ssid->wpa_passphrase,
 311                     ssid->ssid, ssid->ssid_len,
 312                     4096, ssid->wpa_psk->psk, PMK_LEN);
 313         wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)",
 314                         ssid->wpa_psk->psk, PMK_LEN);
 315         return 0;
 316 }
 317
 318
 319 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf)
 320 {
 321         struct hostapd_ssid *ssid = &conf->ssid;
 322
 323         if (ssid->wpa_passphrase != NULL) {
 324                 if (ssid->wpa_psk != NULL) {
 325                         wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK "
 326                                    "instead of passphrase");
 327                 } else {
 328                         wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on "
 329                                    "passphrase");
 330                         if (hostapd_derive_psk(ssid) < 0)
 331                                 return -1;
 332                 }
 333                 ssid->wpa_psk->group = 1;
 334         }
 335
 336         if (ssid->wpa_psk_file) {
 337                 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file,
 338                                                 &conf->ssid))
 339                         return -1;
 340         }
 341
 342         return 0;
 343 }
 344
 345
 346 static void hostapd_config_free_radius(struct hostapd_radius_server *servers,
 347                                        int num_servers)
 348 {
 349         int i;
 350
 351         for (i = 0; i < num_servers; i++) {
 352                 os_free(servers[i].shared_secret);
 353         }
 354         os_free(servers);
 355 }
 356
 357
 358 struct hostapd_radius_attr *
 359 hostapd_config_get_radius_attr(struct hostapd_radius_attr *attr, u8 type)
 360 {
 361         for (; attr; attr = attr->next) {
 362                 if (attr->type == type)
 363                         return attr;
 364         }
 365         return NULL;
 366 }
 367
 368
 369 static void hostapd_config_free_radius_attr(struct hostapd_radius_attr *attr)
 370 {
 371         struct hostapd_radius_attr *prev;
 372
 373         while (attr) {
 374                 prev = attr;
 375                 attr = attr->next;
 376                 wpabuf_free(prev->val);
 377                 os_free(prev);
 378         }
 379 }
 380
 381
 382 void hostapd_config_free_eap_user(struct hostapd_eap_user *user)
 383 {
 384         hostapd_config_free_radius_attr(user->accept_attr);
 385         os_free(user->identity);
 386         bin_clear_free(user->password, user->password_len);
 387         os_free(user);
 388 }
 389
 390
 391 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys)
 392 {
 393         int i;
 394         for (i = 0; i < NUM_WEP_KEYS; i++) {
 395                 bin_clear_free(keys->key[i], keys->len[i]);
 396                 keys->key[i] = NULL;
 397         }
 398 }
 399
 400
 401 void hostapd_config_clear_wpa_psk(struct hostapd_wpa_psk **l)
 402 {
 403         struct hostapd_wpa_psk *psk, *tmp;
 404
 405         for (psk = *l; psk;) {
 406                 tmp = psk;
 407                 psk = psk->next;
 408                 bin_clear_free(tmp, sizeof(*tmp));
 409         }
 410         *l = NULL;
 411 }
 412
 413
 414 void hostapd_config_free_bss(struct hostapd_bss_config *conf)
 415 {
 416         struct hostapd_eap_user *user, *prev_user;
 417
 418         if (conf == NULL)
 419                 return;
 420
 421         hostapd_config_clear_wpa_psk(&conf->ssid.wpa_psk);
 422
 423         str_clear_free(conf->ssid.wpa_passphrase);
 424         os_free(conf->ssid.wpa_psk_file);
 425         hostapd_config_free_wep(&conf->ssid.wep);
 426 #ifdef CONFIG_FULL_DYNAMIC_VLAN
 427         os_free(conf->ssid.vlan_tagged_interface);
 428 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
 429
 430         user = conf->eap_user;
 431         while (user) {
 432                 prev_user = user;
 433                 user = user->next;
 434                 hostapd_config_free_eap_user(prev_user);
 435         }
 436         os_free(conf->eap_user_sqlite);
 437
 438         os_free(conf->eap_req_id_text);
 439         os_free(conf->erp_domain);
 440         os_free(conf->accept_mac);
 441         os_free(conf->deny_mac);
 442         os_free(conf->nas_identifier);
 443         if (conf->radius) {
 444                 hostapd_config_free_radius(conf->radius->auth_servers,
 445                                            conf->radius->num_auth_servers);
 446                 hostapd_config_free_radius(conf->radius->acct_servers,
 447                                            conf->radius->num_acct_servers);
 448         }
 449         hostapd_config_free_radius_attr(conf->radius_auth_req_attr);
 450         hostapd_config_free_radius_attr(conf->radius_acct_req_attr);
 451         os_free(conf->rsn_preauth_interfaces);
 452         os_free(conf->ctrl_interface);
 453         os_free(conf->ca_cert);
 454         os_free(conf->server_cert);
 455         os_free(conf->private_key);
 456         os_free(conf->private_key_passwd);
 457         os_free(conf->ocsp_stapling_response);
 458         os_free(conf->dh_file);
 459         os_free(conf->openssl_ciphers);
 460         os_free(conf->pac_opaque_encr_key);
 461         os_free(conf->eap_fast_a_id);
 462         os_free(conf->eap_fast_a_id_info);
 463         os_free(conf->eap_sim_db);
 464         os_free(conf->radius_server_clients);
 465         os_free(conf->radius);
 466         os_free(conf->radius_das_shared_secret);
 467         hostapd_config_free_vlan(conf);
 468         os_free(conf->time_zone);
 469
 470 #ifdef CONFIG_IEEE80211R
 471         {
 472                 struct ft_remote_r0kh *r0kh, *r0kh_prev;
 473                 struct ft_remote_r1kh *r1kh, *r1kh_prev;
 474
 475                 r0kh = conf->r0kh_list;
 476                 conf->r0kh_list = NULL;
 477                 while (r0kh) {
 478                         r0kh_prev = r0kh;
 479                         r0kh = r0kh->next;
 480                         os_free(r0kh_prev);
 481                 }
 482
 483                 r1kh = conf->r1kh_list;
 484                 conf->r1kh_list = NULL;
 485                 while (r1kh) {
 486                         r1kh_prev = r1kh;
 487                         r1kh = r1kh->next;
 488                         os_free(r1kh_prev);
 489                 }
 490         }
 491 #endif /* CONFIG_IEEE80211R */
 492
 493 #ifdef CONFIG_WPS
 494         os_free(conf->wps_pin_requests);
 495         os_free(conf->device_name);
 496         os_free(conf->manufacturer);
 497         os_free(conf->model_name);
 498         os_free(conf->model_number);
 499         os_free(conf->serial_number);
 500         os_free(conf->config_methods);
 501         os_free(conf->ap_pin);
 502         os_free(conf->extra_cred);
 503         os_free(conf->ap_settings);
 504         os_free(conf->upnp_iface);
 505         os_free(conf->friendly_name);
 506         os_free(conf->manufacturer_url);
 507         os_free(conf->model_description);
 508         os_free(conf->model_url);
 509         os_free(conf->upc);
 510         {
 511                 unsigned int i;
 512
 513                 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++)
 514                         wpabuf_free(conf->wps_vendor_ext[i]);
 515         }
 516         wpabuf_free(conf->wps_nfc_dh_pubkey);
 517         wpabuf_free(conf->wps_nfc_dh_privkey);
 518         wpabuf_free(conf->wps_nfc_dev_pw);
 519 #endif /* CONFIG_WPS */
 520
 521         os_free(conf->roaming_consortium);
 522         os_free(conf->venue_name);
 523         os_free(conf->nai_realm_data);
 524         os_free(conf->network_auth_type);
 525         os_free(conf->anqp_3gpp_cell_net);
 526         os_free(conf->domain_name);
 527
 528 #ifdef CONFIG_RADIUS_TEST
 529         os_free(conf->dump_msk_file);
 530 #endif /* CONFIG_RADIUS_TEST */
 531
 532 #ifdef CONFIG_HS20
 533         os_free(conf->hs20_oper_friendly_name);
 534         os_free(conf->hs20_wan_metrics);
 535         os_free(conf->hs20_connection_capability);
 536         os_free(conf->hs20_operating_class);
 537         os_free(conf->hs20_icons);
 538         if (conf->hs20_osu_providers) {
 539                 size_t i;
 540                 for (i = 0; i < conf->hs20_osu_providers_count; i++) {
 541                         struct hs20_osu_provider *p;
 542                         size_t j;
 543                         p = &conf->hs20_osu_providers[i];
 544                         os_free(p->friendly_name);
 545                         os_free(p->server_uri);
 546                         os_free(p->method_list);
 547                         for (j = 0; j < p->icons_count; j++)
 548                                 os_free(p->icons[j]);
 549                         os_free(p->icons);
 550                         os_free(p->osu_nai);
 551                         os_free(p->service_desc);
 552                 }
 553                 os_free(conf->hs20_osu_providers);
 554         }
 555         os_free(conf->subscr_remediation_url);
 556 #endif /* CONFIG_HS20 */
 557
 558         wpabuf_free(conf->vendor_elements);
 559
 560         os_free(conf->sae_groups);
 561
 562         os_free(conf->wowlan_triggers);
 563
 564         os_free(conf->server_id);
 565
 566 #ifdef CONFIG_TESTING_OPTIONS
 567         wpabuf_free(conf->own_ie_override);
 568 #endif /* CONFIG_TESTING_OPTIONS */
 569
 570         os_free(conf->no_probe_resp_if_seen_on);
 571         os_free(conf->no_auth_if_seen_on);
 572
 573         os_free(conf);
 574 }
 575
 576
 577 /**
 578  * hostapd_config_free - Free hostapd configuration
 579  * @conf: Configuration data from hostapd_config_read().
 580  */
 581 void hostapd_config_free(struct hostapd_config *conf)
 582 {
 583         size_t i;
 584
 585         if (conf == NULL)
 586                 return;
 587
 588         for (i = 0; i < conf->num_bss; i++)
 589                 hostapd_config_free_bss(conf->bss[i]);
 590         os_free(conf->bss);
 591         os_free(conf->supported_rates);
 592         os_free(conf->basic_rates);
 593         os_free(conf->acs_ch_list.range);
 594         os_free(conf->driver_params);
 595 #ifdef CONFIG_ACS
 596         os_free(conf->acs_chan_bias);
 597 #endif /* CONFIG_ACS */
 598
 599         os_free(conf);
 600 }
 601
 602
 603 /**
 604  * hostapd_maclist_found - Find a MAC address from a list
 605  * @list: MAC address list
 606  * @num_entries: Number of addresses in the list
 607  * @addr: Address to search for
 608  * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed
 609  * Returns: 1 if address is in the list or 0 if not.
 610  *
 611  * Perform a binary search for given MAC address from a pre-sorted list.
 612  */
 613 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries,
 614                           const u8 *addr, int *vlan_id)
 615 {
 616         int start, end, middle, res;
 617
 618         start = 0;
 619         end = num_entries - 1;
 620
 621         while (start <= end) {
 622                 middle = (start + end) / 2;
 623                 res = os_memcmp(list[middle].addr, addr, ETH_ALEN);
 624                 if (res == 0) {
 625                         if (vlan_id)
 626                                 *vlan_id = list[middle].vlan_id;
 627                         return 1;
 628                 }
 629                 if (res < 0)
 630                         start = middle + 1;
 631                 else
 632                         end = middle - 1;
 633         }
 634
 635         return 0;
 636 }
 637
 638
 639 int hostapd_rate_found(int *list, int rate)
 640 {
 641         int i;
 642
 643         if (list == NULL)
 644                 return 0;
 645
 646         for (i = 0; list[i] >= 0; i++)
 647                 if (list[i] == rate)
 648                         return 1;
 649
 650         return 0;
 651 }
 652
 653
 654 int hostapd_vlan_id_valid(struct hostapd_vlan *vlan, int vlan_id)
 655 {
 656         struct hostapd_vlan *v = vlan;
 657         while (v) {
 658                 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD)
 659                         return 1;
 660                 v = v->next;
 661         }
 662         return 0;
 663 }
 664
 665
 666 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id)
 667 {
 668         struct hostapd_vlan *v = vlan;
 669         while (v) {
 670                 if (v->vlan_id == vlan_id)
 671                         return v->ifname;
 672                 v = v->next;
 673         }
 674         return NULL;
 675 }
 676
 677
 678 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf,
 679                            const u8 *addr, const u8 *p2p_dev_addr,
 680                            const u8 *prev_psk)
 681 {
 682         struct hostapd_wpa_psk *psk;
 683         int next_ok = prev_psk == NULL;
 684
 685         if (p2p_dev_addr && !is_zero_ether_addr(p2p_dev_addr)) {
 686                 wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR
 687                            " p2p_dev_addr=" MACSTR " prev_psk=%p",
 688                            MAC2STR(addr), MAC2STR(p2p_dev_addr), prev_psk);
 689                 addr = NULL; /* Use P2P Device Address for matching */
 690         } else {
 691                 wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR
 692                            " prev_psk=%p",
 693                            MAC2STR(addr), prev_psk);
 694         }
 695
 696         for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) {
 697                 if (next_ok &&
 698                     (psk->group ||
 699                      (addr && os_memcmp(psk->addr, addr, ETH_ALEN) == 0) ||
 700                      (!addr && p2p_dev_addr &&
 701                       os_memcmp(psk->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
 702                       0)))
 703                         return psk->psk;
 704
 705                 if (psk->psk == prev_psk)
 706                         next_ok = 1;
 707         }
 708
 709         return NULL;
 710 }
 711
 712
 713 static int hostapd_config_check_bss(struct hostapd_bss_config *bss,
 714                                     struct hostapd_config *conf,
 715                                     int full_config)
 716 {
 717         if (full_config && bss->ieee802_1x && !bss->eap_server &&
 718             !bss->radius->auth_servers) {
 719                 wpa_printf(MSG_ERROR, "Invalid IEEE 802.1X configuration (no "
 720                            "EAP authenticator configured).");
 721                 return -1;
 722         }
 723
 724         if (bss->wpa) {
 725                 int wep, i;
 726
 727                 wep = bss->default_wep_key_len > 0 ||
 728                        bss->individual_wep_key_len > 0;
 729                 for (i = 0; i < NUM_WEP_KEYS; i++) {
 730                         if (bss->ssid.wep.keys_set) {
 731                                 wep = 1;
 732                                 break;
 733                         }
 734                 }
 735
 736                 if (wep) {
 737                         wpa_printf(MSG_ERROR, "WEP configuration in a WPA network is not supported");
 738                         return -1;
 739                 }
 740         }
 741
 742         if (full_config && bss->wpa &&
 743             bss->wpa_psk_radius != PSK_RADIUS_IGNORED &&
 744             bss->macaddr_acl != USE_EXTERNAL_RADIUS_AUTH) {
 745                 wpa_printf(MSG_ERROR, "WPA-PSK using RADIUS enabled, but no "
 746                            "RADIUS checking (macaddr_acl=2) enabled.");
 747                 return -1;
 748         }
 749
 750         if (full_config && bss->wpa && (bss->wpa_key_mgmt & WPA_KEY_MGMT_PSK) &&
 751             bss->ssid.wpa_psk == NULL && bss->ssid.wpa_passphrase == NULL &&
 752             bss->ssid.wpa_psk_file == NULL &&
 753             (bss->wpa_psk_radius != PSK_RADIUS_REQUIRED ||
 754              bss->macaddr_acl != USE_EXTERNAL_RADIUS_AUTH)) {
 755                 wpa_printf(MSG_ERROR, "WPA-PSK enabled, but PSK or passphrase "
 756                            "is not configured.");
 757                 return -1;
 758         }
 759
 760         if (full_config && hostapd_mac_comp_empty(bss->bssid) != 0) {
 761                 size_t i;
 762
 763                 for (i = 0; i < conf->num_bss; i++) {
 764                         if (conf->bss[i] != bss &&
 765                             (hostapd_mac_comp(conf->bss[i]->bssid,
 766                                               bss->bssid) == 0)) {
 767                                 wpa_printf(MSG_ERROR, "Duplicate BSSID " MACSTR
 768                                            " on interface '%s' and '%s'.",
 769                                            MAC2STR(bss->bssid),
 770                                            conf->bss[i]->iface, bss->iface);
 771                                 return -1;
 772                         }
 773                 }
 774         }
 775
 776 #ifdef CONFIG_IEEE80211R
 777         if (full_config && wpa_key_mgmt_ft(bss->wpa_key_mgmt) &&
 778             (bss->nas_identifier == NULL ||
 779              os_strlen(bss->nas_identifier) < 1 ||
 780              os_strlen(bss->nas_identifier) > FT_R0KH_ID_MAX_LEN)) {
 781                 wpa_printf(MSG_ERROR, "FT (IEEE 802.11r) requires "
 782                            "nas_identifier to be configured as a 1..48 octet "
 783                            "string");
 784                 return -1;
 785         }
 786 #endif /* CONFIG_IEEE80211R */
 787
 788 #ifdef CONFIG_IEEE80211N
 789         if (full_config && conf->ieee80211n &&
 790             conf->hw_mode == HOSTAPD_MODE_IEEE80211B) {
 791                 bss->disable_11n = 1;
 792                 wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) in 11b mode is not "
 793                            "allowed, disabling HT capabilities");
 794         }
 795
 796         if (full_config && conf->ieee80211n &&
 797             bss->ssid.security_policy == SECURITY_STATIC_WEP) {
 798                 bss->disable_11n = 1;
 799                 wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) with WEP is not "
 800                            "allowed, disabling HT capabilities");
 801         }
 802
 803         if (full_config && conf->ieee80211n && bss->wpa &&
 804             !(bss->wpa_pairwise & WPA_CIPHER_CCMP) &&
 805             !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP |
 806                                    WPA_CIPHER_CCMP_256 | WPA_CIPHER_GCMP_256)))
 807         {
 808                 bss->disable_11n = 1;
 809                 wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) with WPA/WPA2 "
 810                            "requires CCMP/GCMP to be enabled, disabling HT "
 811                            "capabilities");
 812         }
 813 #endif /* CONFIG_IEEE80211N */
 814
 815 #ifdef CONFIG_WPS
 816         if (full_config && bss->wps_state && bss->ignore_broadcast_ssid) {
 817                 wpa_printf(MSG_INFO, "WPS: ignore_broadcast_ssid "
 818                            "configuration forced WPS to be disabled");
 819                 bss->wps_state = 0;
 820         }
 821
 822         if (full_config && bss->wps_state &&
 823             bss->ssid.wep.keys_set && bss->wpa == 0) {
 824                 wpa_printf(MSG_INFO, "WPS: WEP configuration forced WPS to be "
 825                            "disabled");
 826                 bss->wps_state = 0;
 827         }
 828
 829         if (full_config && bss->wps_state && bss->wpa &&
 830             (!(bss->wpa & 2) ||
 831              !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)))) {
 832                 wpa_printf(MSG_INFO, "WPS: WPA/TKIP configuration without "
 833                            "WPA2/CCMP/GCMP forced WPS to be disabled");
 834                 bss->wps_state = 0;
 835         }
 836 #endif /* CONFIG_WPS */
 837
 838 #ifdef CONFIG_HS20
 839         if (full_config && bss->hs20 &&
 840             (!(bss->wpa & 2) ||
 841              !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP |
 842                                     WPA_CIPHER_CCMP_256 |
 843                                     WPA_CIPHER_GCMP_256)))) {
 844                 wpa_printf(MSG_ERROR, "HS 2.0: WPA2-Enterprise/CCMP "
 845                            "configuration is required for Hotspot 2.0 "
 846                            "functionality");
 847                 return -1;
 848         }
 849 #endif /* CONFIG_HS20 */
 850
 851         return 0;
 852 }
 853
 854
 855 static int hostapd_config_check_cw(struct hostapd_config *conf, int queue)
 856 {
 857         int tx_cwmin = conf->tx_queue[queue].cwmin;
 858         int tx_cwmax = conf->tx_queue[queue].cwmax;
 859         int ac_cwmin = conf->wmm_ac_params[queue].cwmin;
 860         int ac_cwmax = conf->wmm_ac_params[queue].cwmax;
 861
 862         if (tx_cwmin > tx_cwmax) {
 863                 wpa_printf(MSG_ERROR,
 864                            "Invalid TX queue cwMin/cwMax values. cwMin(%d) greater than cwMax(%d)",
 865                            tx_cwmin, tx_cwmax);
 866                 return -1;
 867         }
 868         if (ac_cwmin > ac_cwmax) {
 869                 wpa_printf(MSG_ERROR,
 870                            "Invalid WMM AC cwMin/cwMax values. cwMin(%d) greater than cwMax(%d)",
 871                            ac_cwmin, ac_cwmax);
 872                 return -1;
 873         }
 874         return 0;
 875 }
 876
 877
 878 int hostapd_config_check(struct hostapd_config *conf, int full_config)
 879 {
 880         size_t i;
 881
 882         if (full_config && conf->ieee80211d &&
 883             (!conf->country[0] || !conf->country[1])) {
 884                 wpa_printf(MSG_ERROR, "Cannot enable IEEE 802.11d without "
 885                            "setting the country_code");
 886                 return -1;
 887         }
 888
 889         if (full_config && conf->ieee80211h && !conf->ieee80211d) {
 890                 wpa_printf(MSG_ERROR, "Cannot enable IEEE 802.11h without "
 891                            "IEEE 802.11d enabled");
 892                 return -1;
 893         }
 894
 895         if (full_config && conf->local_pwr_constraint != -1 &&
 896             !conf->ieee80211d) {
 897                 wpa_printf(MSG_ERROR, "Cannot add Power Constraint element without Country element");
 898                 return -1;
 899         }
 900
 901         if (full_config && conf->spectrum_mgmt_required &&
 902             conf->local_pwr_constraint == -1) {
 903                 wpa_printf(MSG_ERROR, "Cannot set Spectrum Management bit without Country and Power Constraint elements");
 904                 return -1;
 905         }
 906
 907         for (i = 0; i < NUM_TX_QUEUES; i++) {
 908                 if (hostapd_config_check_cw(conf, i))
 909                         return -1;
 910         }
 911
 912         for (i = 0; i < conf->num_bss; i++) {
 913                 if (hostapd_config_check_bss(conf->bss[i], conf, full_config))
 914                         return -1;
 915         }
 916
 917         return 0;
 918 }
 919
 920
 921 void hostapd_set_security_params(struct hostapd_bss_config *bss,
 922                                  int full_config)
 923 {
 924         if (bss->individual_wep_key_len == 0) {
 925                 /* individual keys are not use; can use key idx0 for
 926                  * broadcast keys */
 927                 bss->broadcast_key_idx_min = 0;
 928         }
 929
 930         if ((bss->wpa & 2) && bss->rsn_pairwise == 0)
 931                 bss->rsn_pairwise = bss->wpa_pairwise;
 932         bss->wpa_group = wpa_select_ap_group_cipher(bss->wpa, bss->wpa_pairwise,
 933                                                     bss->rsn_pairwise);
 934
 935         if (full_config) {
 936                 bss->radius->auth_server = bss->radius->auth_servers;
 937                 bss->radius->acct_server = bss->radius->acct_servers;
 938         }
 939
 940         if (bss->wpa && bss->ieee802_1x) {
 941                 bss->ssid.security_policy = SECURITY_WPA;
 942         } else if (bss->wpa) {
 943                 bss->ssid.security_policy = SECURITY_WPA_PSK;
 944         } else if (bss->ieee802_1x) {
 945                 int cipher = WPA_CIPHER_NONE;
 946                 bss->ssid.security_policy = SECURITY_IEEE_802_1X;
 947                 bss->ssid.wep.default_len = bss->default_wep_key_len;
 948                 if (full_config && bss->default_wep_key_len) {
 949                         cipher = bss->default_wep_key_len >= 13 ?
 950                                 WPA_CIPHER_WEP104 : WPA_CIPHER_WEP40;
 951                 } else if (full_config && bss->ssid.wep.keys_set) {
 952                         if (bss->ssid.wep.len[0] >= 13)
 953                                 cipher = WPA_CIPHER_WEP104;
 954                         else
 955                                 cipher = WPA_CIPHER_WEP40;
 956                 }
 957                 bss->wpa_group = cipher;
 958                 bss->wpa_pairwise = cipher;
 959                 bss->rsn_pairwise = cipher;
 960                 if (full_config)
 961                         bss->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
 962         } else if (bss->ssid.wep.keys_set) {
 963                 int cipher = WPA_CIPHER_WEP40;
 964                 if (bss->ssid.wep.len[0] >= 13)
 965                         cipher = WPA_CIPHER_WEP104;
 966                 bss->ssid.security_policy = SECURITY_STATIC_WEP;
 967                 bss->wpa_group = cipher;
 968                 bss->wpa_pairwise = cipher;
 969                 bss->rsn_pairwise = cipher;
 970                 if (full_config)
 971                         bss->wpa_key_mgmt = WPA_KEY_MGMT_NONE;
 972         } else if (bss->osen) {
 973                 bss->ssid.security_policy = SECURITY_OSEN;
 974                 bss->wpa_group = WPA_CIPHER_CCMP;
 975                 bss->wpa_pairwise = 0;
 976                 bss->rsn_pairwise = WPA_CIPHER_CCMP;
 977         } else {
 978                 bss->ssid.security_policy = SECURITY_PLAINTEXT;
 979                 if (full_config) {
 980                         bss->wpa_group = WPA_CIPHER_NONE;
 981                         bss->wpa_pairwise = WPA_CIPHER_NONE;
 982                         bss->rsn_pairwise = WPA_CIPHER_NONE;
 983                         bss->wpa_key_mgmt = WPA_KEY_MGMT_NONE;
 984                 }
 985         }
 986 }