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         dl_list_init(&bss->anqp_elem);
  42
  43         bss->logger_syslog_level = HOSTAPD_LEVEL_INFO;
  44         bss->logger_stdout_level = HOSTAPD_LEVEL_INFO;
  45         bss->logger_syslog = (unsigned int) -1;
  46         bss->logger_stdout = (unsigned int) -1;
  47
  48         bss->auth_algs = WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED;
  49
  50         bss->wep_rekeying_period = 300;
  51         /* use key0 in individual key and key1 in broadcast key */
  52         bss->broadcast_key_idx_min = 1;
  53         bss->broadcast_key_idx_max = 2;
  54         bss->eap_reauth_period = 3600;
  55
  56         bss->wpa_group_rekey = 600;
  57         bss->wpa_gmk_rekey = 86400;
  58         bss->wpa_key_mgmt = WPA_KEY_MGMT_PSK;
  59         bss->wpa_pairwise = WPA_CIPHER_TKIP;
  60         bss->wpa_group = WPA_CIPHER_TKIP;
  61         bss->rsn_pairwise = 0;
  62
  63         bss->max_num_sta = MAX_STA_COUNT;
  64
  65         bss->dtim_period = 2;
  66
  67         bss->radius_server_auth_port = 1812;
  68         bss->eap_sim_db_timeout = 1;
  69         bss->ap_max_inactivity = AP_MAX_INACTIVITY;
  70         bss->eapol_version = EAPOL_VERSION;
  71
  72         bss->max_listen_interval = 65535;
  73
  74         bss->pwd_group = 19; /* ECC: GF(p=256) */
  75
  76 #ifdef CONFIG_IEEE80211W
  77         bss->assoc_sa_query_max_timeout = 1000;
  78         bss->assoc_sa_query_retry_timeout = 201;
  79         bss->group_mgmt_cipher = WPA_CIPHER_AES_128_CMAC;
  80 #endif /* CONFIG_IEEE80211W */
  81 #ifdef EAP_SERVER_FAST
  82          /* both anonymous and authenticated provisioning */
  83         bss->eap_fast_prov = 3;
  84         bss->pac_key_lifetime = 7 * 24 * 60 * 60;
  85         bss->pac_key_refresh_time = 1 * 24 * 60 * 60;
  86 #endif /* EAP_SERVER_FAST */
  87
  88         /* Set to -1 as defaults depends on HT in setup */
  89         bss->wmm_enabled = -1;
  90
  91 #ifdef CONFIG_IEEE80211R
  92         bss->ft_over_ds = 1;
  93 #endif /* CONFIG_IEEE80211R */
  94
  95         bss->radius_das_time_window = 300;
  96
  97         bss->sae_anti_clogging_threshold = 5;
  98 }
  99
 100
 101 struct hostapd_config * hostapd_config_defaults(void)
 102 {
 103 #define ecw2cw(ecw) ((1 << (ecw)) - 1)
 104
 105         struct hostapd_config *conf;
 106         struct hostapd_bss_config *bss;
 107         const int aCWmin = 4, aCWmax = 10;
 108         const struct hostapd_wmm_ac_params ac_bk =
 109                 { aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */
 110         const struct hostapd_wmm_ac_params ac_be =
 111                 { aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */
 112         const struct hostapd_wmm_ac_params ac_vi = /* video traffic */
 113                 { aCWmin - 1, aCWmin, 2, 3008 / 32, 0 };
 114         const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */
 115                 { aCWmin - 2, aCWmin - 1, 2, 1504 / 32, 0 };
 116         const struct hostapd_tx_queue_params txq_bk =
 117                 { 7, ecw2cw(aCWmin), ecw2cw(aCWmax), 0 };
 118         const struct hostapd_tx_queue_params txq_be =
 119                 { 3, ecw2cw(aCWmin), 4 * (ecw2cw(aCWmin) + 1) - 1, 0};
 120         const struct hostapd_tx_queue_params txq_vi =
 121                 { 1, (ecw2cw(aCWmin) + 1) / 2 - 1, ecw2cw(aCWmin), 30};
 122         const struct hostapd_tx_queue_params txq_vo =
 123                 { 1, (ecw2cw(aCWmin) + 1) / 4 - 1,
 124                   (ecw2cw(aCWmin) + 1) / 2 - 1, 15};
 125
 126 #undef ecw2cw
 127
 128         conf = os_zalloc(sizeof(*conf));
 129         bss = os_zalloc(sizeof(*bss));
 130         if (conf == NULL || bss == NULL) {
 131                 wpa_printf(MSG_ERROR, "Failed to allocate memory for "
 132                            "configuration data.");
 133                 os_free(conf);
 134                 os_free(bss);
 135                 return NULL;
 136         }
 137         conf->bss = os_calloc(1, sizeof(struct hostapd_bss_config *));
 138         if (conf->bss == NULL) {
 139                 os_free(conf);
 140                 os_free(bss);
 141                 return NULL;
 142         }
 143         conf->bss[0] = bss;
 144
 145         bss->radius = os_zalloc(sizeof(*bss->radius));
 146         if (bss->radius == NULL) {
 147                 os_free(conf->bss);
 148                 os_free(conf);
 149                 os_free(bss);
 150                 return NULL;
 151         }
 152
 153         hostapd_config_defaults_bss(bss);
 154
 155         conf->num_bss = 1;
 156
 157         conf->beacon_int = 100;
 158         conf->rts_threshold = -1; /* use driver default: 2347 */
 159         conf->fragm_threshold = -1; /* user driver default: 2346 */
 160         conf->send_probe_response = 1;
 161         /* Set to invalid value means do not add Power Constraint IE */
 162         conf->local_pwr_constraint = -1;
 163
 164         conf->wmm_ac_params[0] = ac_be;
 165         conf->wmm_ac_params[1] = ac_bk;
 166         conf->wmm_ac_params[2] = ac_vi;
 167         conf->wmm_ac_params[3] = ac_vo;
 168
 169         conf->tx_queue[0] = txq_vo;
 170         conf->tx_queue[1] = txq_vi;
 171         conf->tx_queue[2] = txq_be;
 172         conf->tx_queue[3] = txq_bk;
 173
 174         conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED;
 175
 176         conf->ap_table_max_size = 255;
 177         conf->ap_table_expiration_time = 60;
 178         conf->track_sta_max_age = 180;
 179
 180 #ifdef CONFIG_TESTING_OPTIONS
 181         conf->ignore_probe_probability = 0.0;
 182         conf->ignore_auth_probability = 0.0;
 183         conf->ignore_assoc_probability = 0.0;
 184         conf->ignore_reassoc_probability = 0.0;
 185         conf->corrupt_gtk_rekey_mic_probability = 0.0;
 186         conf->ecsa_ie_only = 0;
 187 #endif /* CONFIG_TESTING_OPTIONS */
 188
 189         conf->acs = 0;
 190         conf->acs_ch_list.num = 0;
 191 #ifdef CONFIG_ACS
 192         conf->acs_num_scans = 5;
 193 #endif /* CONFIG_ACS */
 194
 195         return conf;
 196 }
 197
 198
 199 int hostapd_mac_comp(const void *a, const void *b)
 200 {
 201         return os_memcmp(a, b, 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 static void hostapd_config_free_anqp_elem(struct hostapd_bss_config *conf)
 411 {
 412         struct anqp_element *elem;
 413
 414         while ((elem = dl_list_first(&conf->anqp_elem, struct anqp_element,
 415                                      list))) {
 416                 dl_list_del(&elem->list);
 417                 wpabuf_free(elem->payload);
 418                 os_free(elem);
 419         }
 420 }
 421
 422
 423 void hostapd_config_free_bss(struct hostapd_bss_config *conf)
 424 {
 425         struct hostapd_eap_user *user, *prev_user;
 426
 427         if (conf == NULL)
 428                 return;
 429
 430         hostapd_config_clear_wpa_psk(&conf->ssid.wpa_psk);
 431
 432         str_clear_free(conf->ssid.wpa_passphrase);
 433         os_free(conf->ssid.wpa_psk_file);
 434         hostapd_config_free_wep(&conf->ssid.wep);
 435 #ifdef CONFIG_FULL_DYNAMIC_VLAN
 436         os_free(conf->ssid.vlan_tagged_interface);
 437 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
 438
 439         user = conf->eap_user;
 440         while (user) {
 441                 prev_user = user;
 442                 user = user->next;
 443                 hostapd_config_free_eap_user(prev_user);
 444         }
 445         os_free(conf->eap_user_sqlite);
 446
 447         os_free(conf->eap_req_id_text);
 448         os_free(conf->erp_domain);
 449         os_free(conf->accept_mac);
 450         os_free(conf->deny_mac);
 451         os_free(conf->nas_identifier);
 452         if (conf->radius) {
 453                 hostapd_config_free_radius(conf->radius->auth_servers,
 454                                            conf->radius->num_auth_servers);
 455                 hostapd_config_free_radius(conf->radius->acct_servers,
 456                                            conf->radius->num_acct_servers);
 457         }
 458         hostapd_config_free_radius_attr(conf->radius_auth_req_attr);
 459         hostapd_config_free_radius_attr(conf->radius_acct_req_attr);
 460         os_free(conf->rsn_preauth_interfaces);
 461         os_free(conf->ctrl_interface);
 462         os_free(conf->ca_cert);
 463         os_free(conf->server_cert);
 464         os_free(conf->private_key);
 465         os_free(conf->private_key_passwd);
 466         os_free(conf->ocsp_stapling_response);
 467         os_free(conf->ocsp_stapling_response_multi);
 468         os_free(conf->dh_file);
 469         os_free(conf->openssl_ciphers);
 470         os_free(conf->pac_opaque_encr_key);
 471         os_free(conf->eap_fast_a_id);
 472         os_free(conf->eap_fast_a_id_info);
 473         os_free(conf->eap_sim_db);
 474         os_free(conf->radius_server_clients);
 475         os_free(conf->radius);
 476         os_free(conf->radius_das_shared_secret);
 477         hostapd_config_free_vlan(conf);
 478         os_free(conf->time_zone);
 479
 480 #ifdef CONFIG_IEEE80211R
 481         {
 482                 struct ft_remote_r0kh *r0kh, *r0kh_prev;
 483                 struct ft_remote_r1kh *r1kh, *r1kh_prev;
 484
 485                 r0kh = conf->r0kh_list;
 486                 conf->r0kh_list = NULL;
 487                 while (r0kh) {
 488                         r0kh_prev = r0kh;
 489                         r0kh = r0kh->next;
 490                         os_free(r0kh_prev);
 491                 }
 492
 493                 r1kh = conf->r1kh_list;
 494                 conf->r1kh_list = NULL;
 495                 while (r1kh) {
 496                         r1kh_prev = r1kh;
 497                         r1kh = r1kh->next;
 498                         os_free(r1kh_prev);
 499                 }
 500         }
 501 #endif /* CONFIG_IEEE80211R */
 502
 503 #ifdef CONFIG_WPS
 504         os_free(conf->wps_pin_requests);
 505         os_free(conf->device_name);
 506         os_free(conf->manufacturer);
 507         os_free(conf->model_name);
 508         os_free(conf->model_number);
 509         os_free(conf->serial_number);
 510         os_free(conf->config_methods);
 511         os_free(conf->ap_pin);
 512         os_free(conf->extra_cred);
 513         os_free(conf->ap_settings);
 514         os_free(conf->upnp_iface);
 515         os_free(conf->friendly_name);
 516         os_free(conf->manufacturer_url);
 517         os_free(conf->model_description);
 518         os_free(conf->model_url);
 519         os_free(conf->upc);
 520         {
 521                 unsigned int i;
 522
 523                 for (i = 0; i < MAX_WPS_VENDOR_EXTENSIONS; i++)
 524                         wpabuf_free(conf->wps_vendor_ext[i]);
 525         }
 526         wpabuf_free(conf->wps_nfc_dh_pubkey);
 527         wpabuf_free(conf->wps_nfc_dh_privkey);
 528         wpabuf_free(conf->wps_nfc_dev_pw);
 529 #endif /* CONFIG_WPS */
 530
 531         os_free(conf->roaming_consortium);
 532         os_free(conf->venue_name);
 533         os_free(conf->nai_realm_data);
 534         os_free(conf->network_auth_type);
 535         os_free(conf->anqp_3gpp_cell_net);
 536         os_free(conf->domain_name);
 537         hostapd_config_free_anqp_elem(conf);
 538
 539 #ifdef CONFIG_RADIUS_TEST
 540         os_free(conf->dump_msk_file);
 541 #endif /* CONFIG_RADIUS_TEST */
 542
 543 #ifdef CONFIG_HS20
 544         os_free(conf->hs20_oper_friendly_name);
 545         os_free(conf->hs20_wan_metrics);
 546         os_free(conf->hs20_connection_capability);
 547         os_free(conf->hs20_operating_class);
 548         os_free(conf->hs20_icons);
 549         if (conf->hs20_osu_providers) {
 550                 size_t i;
 551                 for (i = 0; i < conf->hs20_osu_providers_count; i++) {
 552                         struct hs20_osu_provider *p;
 553                         size_t j;
 554                         p = &conf->hs20_osu_providers[i];
 555                         os_free(p->friendly_name);
 556                         os_free(p->server_uri);
 557                         os_free(p->method_list);
 558                         for (j = 0; j < p->icons_count; j++)
 559                                 os_free(p->icons[j]);
 560                         os_free(p->icons);
 561                         os_free(p->osu_nai);
 562                         os_free(p->service_desc);
 563                 }
 564                 os_free(conf->hs20_osu_providers);
 565         }
 566         os_free(conf->subscr_remediation_url);
 567 #endif /* CONFIG_HS20 */
 568
 569         wpabuf_free(conf->vendor_elements);
 570
 571         os_free(conf->sae_groups);
 572
 573         os_free(conf->wowlan_triggers);
 574
 575         os_free(conf->server_id);
 576
 577 #ifdef CONFIG_TESTING_OPTIONS
 578         wpabuf_free(conf->own_ie_override);
 579 #endif /* CONFIG_TESTING_OPTIONS */
 580
 581         os_free(conf->no_probe_resp_if_seen_on);
 582         os_free(conf->no_auth_if_seen_on);
 583
 584         os_free(conf);
 585 }
 586
 587
 588 /**
 589  * hostapd_config_free - Free hostapd configuration
 590  * @conf: Configuration data from hostapd_config_read().
 591  */
 592 void hostapd_config_free(struct hostapd_config *conf)
 593 {
 594         size_t i;
 595
 596         if (conf == NULL)
 597                 return;
 598
 599         for (i = 0; i < conf->num_bss; i++)
 600                 hostapd_config_free_bss(conf->bss[i]);
 601         os_free(conf->bss);
 602         os_free(conf->supported_rates);
 603         os_free(conf->basic_rates);
 604         os_free(conf->acs_ch_list.range);
 605         os_free(conf->driver_params);
 606 #ifdef CONFIG_ACS
 607         os_free(conf->acs_chan_bias);
 608 #endif /* CONFIG_ACS */
 609         wpabuf_free(conf->lci);
 610         wpabuf_free(conf->civic);
 611
 612         os_free(conf);
 613 }
 614
 615
 616 /**
 617  * hostapd_maclist_found - Find a MAC address from a list
 618  * @list: MAC address list
 619  * @num_entries: Number of addresses in the list
 620  * @addr: Address to search for
 621  * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed
 622  * Returns: 1 if address is in the list or 0 if not.
 623  *
 624  * Perform a binary search for given MAC address from a pre-sorted list.
 625  */
 626 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries,
 627                           const u8 *addr, struct vlan_description *vlan_id)
 628 {
 629         int start, end, middle, res;
 630
 631         start = 0;
 632         end = num_entries - 1;
 633
 634         while (start <= end) {
 635                 middle = (start + end) / 2;
 636                 res = os_memcmp(list[middle].addr, addr, ETH_ALEN);
 637                 if (res == 0) {
 638                         if (vlan_id)
 639                                 *vlan_id = list[middle].vlan_id;
 640                         return 1;
 641                 }
 642                 if (res < 0)
 643                         start = middle + 1;
 644                 else
 645                         end = middle - 1;
 646         }
 647
 648         return 0;
 649 }
 650
 651
 652 int hostapd_rate_found(int *list, int rate)
 653 {
 654         int i;
 655
 656         if (list == NULL)
 657                 return 0;
 658
 659         for (i = 0; list[i] >= 0; i++)
 660                 if (list[i] == rate)
 661                         return 1;
 662
 663         return 0;
 664 }
 665
 666
 667 int hostapd_vlan_valid(struct hostapd_vlan *vlan,
 668                        struct vlan_description *vlan_desc)
 669 {
 670         struct hostapd_vlan *v = vlan;
 671         int i;
 672
 673         if (!vlan_desc->notempty || vlan_desc->untagged < 0 ||
 674             vlan_desc->untagged > MAX_VLAN_ID)
 675                 return 0;
 676         for (i = 0; i < MAX_NUM_TAGGED_VLAN; i++) {
 677                 if (vlan_desc->tagged[i] < 0 ||
 678                     vlan_desc->tagged[i] > MAX_VLAN_ID)
 679                         return 0;
 680         }
 681         if (!vlan_desc->untagged && !vlan_desc->tagged[0])
 682                 return 0;
 683
 684         while (v) {
 685                 if (!vlan_compare(&v->vlan_desc, vlan_desc) ||
 686                     v->vlan_id == VLAN_ID_WILDCARD)
 687                         return 1;
 688                 v = v->next;
 689         }
 690         return 0;
 691 }
 692
 693
 694 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id)
 695 {
 696         struct hostapd_vlan *v = vlan;
 697         while (v) {
 698                 if (v->vlan_id == vlan_id)
 699                         return v->ifname;
 700                 v = v->next;
 701         }
 702         return NULL;
 703 }
 704
 705
 706 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf,
 707                            const u8 *addr, const u8 *p2p_dev_addr,
 708                            const u8 *prev_psk)
 709 {
 710         struct hostapd_wpa_psk *psk;
 711         int next_ok = prev_psk == NULL;
 712
 713         if (p2p_dev_addr && !is_zero_ether_addr(p2p_dev_addr)) {
 714                 wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR
 715                            " p2p_dev_addr=" MACSTR " prev_psk=%p",
 716                            MAC2STR(addr), MAC2STR(p2p_dev_addr), prev_psk);
 717                 addr = NULL; /* Use P2P Device Address for matching */
 718         } else {
 719                 wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR
 720                            " prev_psk=%p",
 721                            MAC2STR(addr), prev_psk);
 722         }
 723
 724         for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) {
 725                 if (next_ok &&
 726                     (psk->group ||
 727                      (addr && os_memcmp(psk->addr, addr, ETH_ALEN) == 0) ||
 728                      (!addr && p2p_dev_addr &&
 729                       os_memcmp(psk->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
 730                       0)))
 731                         return psk->psk;
 732
 733                 if (psk->psk == prev_psk)
 734                         next_ok = 1;
 735         }
 736
 737         return NULL;
 738 }
 739
 740
 741 static int hostapd_config_check_bss(struct hostapd_bss_config *bss,
 742                                     struct hostapd_config *conf,
 743                                     int full_config)
 744 {
 745         if (full_config && bss->ieee802_1x && !bss->eap_server &&
 746             !bss->radius->auth_servers) {
 747                 wpa_printf(MSG_ERROR, "Invalid IEEE 802.1X configuration (no "
 748                            "EAP authenticator configured).");
 749                 return -1;
 750         }
 751
 752         if (bss->wpa) {
 753                 int wep, i;
 754
 755                 wep = bss->default_wep_key_len > 0 ||
 756                        bss->individual_wep_key_len > 0;
 757                 for (i = 0; i < NUM_WEP_KEYS; i++) {
 758                         if (bss->ssid.wep.keys_set) {
 759                                 wep = 1;
 760                                 break;
 761                         }
 762                 }
 763
 764                 if (wep) {
 765                         wpa_printf(MSG_ERROR, "WEP configuration in a WPA network is not supported");
 766                         return -1;
 767                 }
 768         }
 769
 770         if (full_config && bss->wpa &&
 771             bss->wpa_psk_radius != PSK_RADIUS_IGNORED &&
 772             bss->macaddr_acl != USE_EXTERNAL_RADIUS_AUTH) {
 773                 wpa_printf(MSG_ERROR, "WPA-PSK using RADIUS enabled, but no "
 774                            "RADIUS checking (macaddr_acl=2) enabled.");
 775                 return -1;
 776         }
 777
 778         if (full_config && bss->wpa && (bss->wpa_key_mgmt & WPA_KEY_MGMT_PSK) &&
 779             bss->ssid.wpa_psk == NULL && bss->ssid.wpa_passphrase == NULL &&
 780             bss->ssid.wpa_psk_file == NULL &&
 781             (bss->wpa_psk_radius != PSK_RADIUS_REQUIRED ||
 782              bss->macaddr_acl != USE_EXTERNAL_RADIUS_AUTH)) {
 783                 wpa_printf(MSG_ERROR, "WPA-PSK enabled, but PSK or passphrase "
 784                            "is not configured.");
 785                 return -1;
 786         }
 787
 788         if (full_config && !is_zero_ether_addr(bss->bssid)) {
 789                 size_t i;
 790
 791                 for (i = 0; i < conf->num_bss; i++) {
 792                         if (conf->bss[i] != bss &&
 793                             (hostapd_mac_comp(conf->bss[i]->bssid,
 794                                               bss->bssid) == 0)) {
 795                                 wpa_printf(MSG_ERROR, "Duplicate BSSID " MACSTR
 796                                            " on interface '%s' and '%s'.",
 797                                            MAC2STR(bss->bssid),
 798                                            conf->bss[i]->iface, bss->iface);
 799                                 return -1;
 800                         }
 801                 }
 802         }
 803
 804 #ifdef CONFIG_IEEE80211R
 805         if (full_config && wpa_key_mgmt_ft(bss->wpa_key_mgmt) &&
 806             (bss->nas_identifier == NULL ||
 807              os_strlen(bss->nas_identifier) < 1 ||
 808              os_strlen(bss->nas_identifier) > FT_R0KH_ID_MAX_LEN)) {
 809                 wpa_printf(MSG_ERROR, "FT (IEEE 802.11r) requires "
 810                            "nas_identifier to be configured as a 1..48 octet "
 811                            "string");
 812                 return -1;
 813         }
 814 #endif /* CONFIG_IEEE80211R */
 815
 816 #ifdef CONFIG_IEEE80211N
 817         if (full_config && conf->ieee80211n &&
 818             conf->hw_mode == HOSTAPD_MODE_IEEE80211B) {
 819                 bss->disable_11n = 1;
 820                 wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) in 11b mode is not "
 821                            "allowed, disabling HT capabilities");
 822         }
 823
 824         if (full_config && conf->ieee80211n &&
 825             bss->ssid.security_policy == SECURITY_STATIC_WEP) {
 826                 bss->disable_11n = 1;
 827                 wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) with WEP is not "
 828                            "allowed, disabling HT capabilities");
 829         }
 830
 831         if (full_config && conf->ieee80211n && bss->wpa &&
 832             !(bss->wpa_pairwise & WPA_CIPHER_CCMP) &&
 833             !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP |
 834                                    WPA_CIPHER_CCMP_256 | WPA_CIPHER_GCMP_256)))
 835         {
 836                 bss->disable_11n = 1;
 837                 wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) with WPA/WPA2 "
 838                            "requires CCMP/GCMP to be enabled, disabling HT "
 839                            "capabilities");
 840         }
 841 #endif /* CONFIG_IEEE80211N */
 842
 843 #ifdef CONFIG_WPS
 844         if (full_config && bss->wps_state && bss->ignore_broadcast_ssid) {
 845                 wpa_printf(MSG_INFO, "WPS: ignore_broadcast_ssid "
 846                            "configuration forced WPS to be disabled");
 847                 bss->wps_state = 0;
 848         }
 849
 850         if (full_config && bss->wps_state &&
 851             bss->ssid.wep.keys_set && bss->wpa == 0) {
 852                 wpa_printf(MSG_INFO, "WPS: WEP configuration forced WPS to be "
 853                            "disabled");
 854                 bss->wps_state = 0;
 855         }
 856
 857         if (full_config && bss->wps_state && bss->wpa &&
 858             (!(bss->wpa & 2) ||
 859              !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP)))) {
 860                 wpa_printf(MSG_INFO, "WPS: WPA/TKIP configuration without "
 861                            "WPA2/CCMP/GCMP forced WPS to be disabled");
 862                 bss->wps_state = 0;
 863         }
 864 #endif /* CONFIG_WPS */
 865
 866 #ifdef CONFIG_HS20
 867         if (full_config && bss->hs20 &&
 868             (!(bss->wpa & 2) ||
 869              !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP |
 870                                     WPA_CIPHER_CCMP_256 |
 871                                     WPA_CIPHER_GCMP_256)))) {
 872                 wpa_printf(MSG_ERROR, "HS 2.0: WPA2-Enterprise/CCMP "
 873                            "configuration is required for Hotspot 2.0 "
 874                            "functionality");
 875                 return -1;
 876         }
 877 #endif /* CONFIG_HS20 */
 878
 879 #ifdef CONFIG_MBO
 880         if (full_config && bss->mbo_enabled && (bss->wpa & 2) &&
 881             bss->ieee80211w == NO_MGMT_FRAME_PROTECTION) {
 882                 wpa_printf(MSG_ERROR,
 883                            "MBO: PMF needs to be enabled whenever using WPA2 with MBO");
 884                 return -1;
 885         }
 886 #endif /* CONFIG_MBO */
 887
 888         return 0;
 889 }
 890
 891
 892 static int hostapd_config_check_cw(struct hostapd_config *conf, int queue)
 893 {
 894         int tx_cwmin = conf->tx_queue[queue].cwmin;
 895         int tx_cwmax = conf->tx_queue[queue].cwmax;
 896         int ac_cwmin = conf->wmm_ac_params[queue].cwmin;
 897         int ac_cwmax = conf->wmm_ac_params[queue].cwmax;
 898
 899         if (tx_cwmin > tx_cwmax) {
 900                 wpa_printf(MSG_ERROR,
 901                            "Invalid TX queue cwMin/cwMax values. cwMin(%d) greater than cwMax(%d)",
 902                            tx_cwmin, tx_cwmax);
 903                 return -1;
 904         }
 905         if (ac_cwmin > ac_cwmax) {
 906                 wpa_printf(MSG_ERROR,
 907                            "Invalid WMM AC cwMin/cwMax values. cwMin(%d) greater than cwMax(%d)",
 908                            ac_cwmin, ac_cwmax);
 909                 return -1;
 910         }
 911         return 0;
 912 }
 913
 914
 915 int hostapd_config_check(struct hostapd_config *conf, int full_config)
 916 {
 917         size_t i;
 918
 919         if (full_config && conf->ieee80211d &&
 920             (!conf->country[0] || !conf->country[1])) {
 921                 wpa_printf(MSG_ERROR, "Cannot enable IEEE 802.11d without "
 922                            "setting the country_code");
 923                 return -1;
 924         }
 925
 926         if (full_config && conf->ieee80211h && !conf->ieee80211d) {
 927                 wpa_printf(MSG_ERROR, "Cannot enable IEEE 802.11h without "
 928                            "IEEE 802.11d enabled");
 929                 return -1;
 930         }
 931
 932         if (full_config && conf->local_pwr_constraint != -1 &&
 933             !conf->ieee80211d) {
 934                 wpa_printf(MSG_ERROR, "Cannot add Power Constraint element without Country element");
 935                 return -1;
 936         }
 937
 938         if (full_config && conf->spectrum_mgmt_required &&
 939             conf->local_pwr_constraint == -1) {
 940                 wpa_printf(MSG_ERROR, "Cannot set Spectrum Management bit without Country and Power Constraint elements");
 941                 return -1;
 942         }
 943
 944         for (i = 0; i < NUM_TX_QUEUES; i++) {
 945                 if (hostapd_config_check_cw(conf, i))
 946                         return -1;
 947         }
 948
 949         for (i = 0; i < conf->num_bss; i++) {
 950                 if (hostapd_config_check_bss(conf->bss[i], conf, full_config))
 951                         return -1;
 952         }
 953
 954         return 0;
 955 }
 956
 957
 958 void hostapd_set_security_params(struct hostapd_bss_config *bss,
 959                                  int full_config)
 960 {
 961         if (bss->individual_wep_key_len == 0) {
 962                 /* individual keys are not use; can use key idx0 for
 963                  * broadcast keys */
 964                 bss->broadcast_key_idx_min = 0;
 965         }
 966
 967         if ((bss->wpa & 2) && bss->rsn_pairwise == 0)
 968                 bss->rsn_pairwise = bss->wpa_pairwise;
 969         bss->wpa_group = wpa_select_ap_group_cipher(bss->wpa, bss->wpa_pairwise,
 970                                                     bss->rsn_pairwise);
 971
 972         if (full_config) {
 973                 bss->radius->auth_server = bss->radius->auth_servers;
 974                 bss->radius->acct_server = bss->radius->acct_servers;
 975         }
 976
 977         if (bss->wpa && bss->ieee802_1x) {
 978                 bss->ssid.security_policy = SECURITY_WPA;
 979         } else if (bss->wpa) {
 980                 bss->ssid.security_policy = SECURITY_WPA_PSK;
 981         } else if (bss->ieee802_1x) {
 982                 int cipher = WPA_CIPHER_NONE;
 983                 bss->ssid.security_policy = SECURITY_IEEE_802_1X;
 984                 bss->ssid.wep.default_len = bss->default_wep_key_len;
 985                 if (full_config && bss->default_wep_key_len) {
 986                         cipher = bss->default_wep_key_len >= 13 ?
 987                                 WPA_CIPHER_WEP104 : WPA_CIPHER_WEP40;
 988                 } else if (full_config && bss->ssid.wep.keys_set) {
 989                         if (bss->ssid.wep.len[0] >= 13)
 990                                 cipher = WPA_CIPHER_WEP104;
 991                         else
 992                                 cipher = WPA_CIPHER_WEP40;
 993                 }
 994                 bss->wpa_group = cipher;
 995                 bss->wpa_pairwise = cipher;
 996                 bss->rsn_pairwise = cipher;
 997                 if (full_config)
 998                         bss->wpa_key_mgmt = WPA_KEY_MGMT_IEEE8021X_NO_WPA;
 999         } else if (bss->ssid.wep.keys_set) {
1000                 int cipher = WPA_CIPHER_WEP40;
1001                 if (bss->ssid.wep.len[0] >= 13)
1002                         cipher = WPA_CIPHER_WEP104;
1003                 bss->ssid.security_policy = SECURITY_STATIC_WEP;
1004                 bss->wpa_group = cipher;
1005                 bss->wpa_pairwise = cipher;
1006                 bss->rsn_pairwise = cipher;
1007                 if (full_config)
1008                         bss->wpa_key_mgmt = WPA_KEY_MGMT_NONE;
1009         } else if (bss->osen) {
1010                 bss->ssid.security_policy = SECURITY_OSEN;
1011                 bss->wpa_group = WPA_CIPHER_CCMP;
1012                 bss->wpa_pairwise = 0;
1013                 bss->rsn_pairwise = WPA_CIPHER_CCMP;
1014         } else {
1015                 bss->ssid.security_policy = SECURITY_PLAINTEXT;
1016                 if (full_config) {
1017                         bss->wpa_group = WPA_CIPHER_NONE;
1018                         bss->wpa_pairwise = WPA_CIPHER_NONE;
1019                         bss->rsn_pairwise = WPA_CIPHER_NONE;
1020                         bss->wpa_key_mgmt = WPA_KEY_MGMT_NONE;
1021                 }
1022         }
1023 }