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