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