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