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 #endif /* CONFIG_IEEE80211W */
  77 #ifdef EAP_SERVER_FAST
  78          /* both anonymous and authenticated provisioning */
  79         bss->eap_fast_prov = 3;
  80         bss->pac_key_lifetime = 7 * 24 * 60 * 60;
  81         bss->pac_key_refresh_time = 1 * 24 * 60 * 60;
  82 #endif /* EAP_SERVER_FAST */
  83
  84         /* Set to -1 as defaults depends on HT in setup */
  85         bss->wmm_enabled = -1;
  86
  87 #ifdef CONFIG_IEEE80211R
  88         bss->ft_over_ds = 1;
  89 #endif /* CONFIG_IEEE80211R */
  90
  91         bss->radius_das_time_window = 300;
  92
  93         bss->sae_anti_clogging_threshold = 5;
  94 }
  95
  96
  97 struct hostapd_config * hostapd_config_defaults(void)
  98 {
  99 #define ecw2cw(ecw) ((1 << (ecw)) - 1)
 100
 101         struct hostapd_config *conf;
 102         struct hostapd_bss_config *bss;
 103         const int aCWmin = 4, aCWmax = 10;
 104         const struct hostapd_wmm_ac_params ac_bk =
 105                 { aCWmin, aCWmax, 7, 0, 0 }; /* background traffic */
 106         const struct hostapd_wmm_ac_params ac_be =
 107                 { aCWmin, aCWmax, 3, 0, 0 }; /* best effort traffic */
 108         const struct hostapd_wmm_ac_params ac_vi = /* video traffic */
 109                 { aCWmin - 1, aCWmin, 2, 3000 / 32, 0 };
 110         const struct hostapd_wmm_ac_params ac_vo = /* voice traffic */
 111                 { aCWmin - 2, aCWmin - 1, 2, 1500 / 32, 0 };
 112         const struct hostapd_tx_queue_params txq_bk =
 113                 { 7, ecw2cw(aCWmin), ecw2cw(aCWmax), 0 };
 114         const struct hostapd_tx_queue_params txq_be =
 115                 { 3, ecw2cw(aCWmin), 4 * (ecw2cw(aCWmin) + 1) - 1, 0};
 116         const struct hostapd_tx_queue_params txq_vi =
 117                 { 1, (ecw2cw(aCWmin) + 1) / 2 - 1, ecw2cw(aCWmin), 30};
 118         const struct hostapd_tx_queue_params txq_vo =
 119                 { 1, (ecw2cw(aCWmin) + 1) / 4 - 1,
 120                   (ecw2cw(aCWmin) + 1) / 2 - 1, 15};
 121
 122 #undef ecw2cw
 123
 124         conf = os_zalloc(sizeof(*conf));
 125         bss = os_zalloc(sizeof(*bss));
 126         if (conf == NULL || bss == NULL) {
 127                 wpa_printf(MSG_ERROR, "Failed to allocate memory for "
 128                            "configuration data.");
 129                 os_free(conf);
 130                 os_free(bss);
 131                 return NULL;
 132         }
 133         conf->bss = os_calloc(1, sizeof(struct hostapd_bss_config *));
 134         if (conf->bss == NULL) {
 135                 os_free(conf);
 136                 os_free(bss);
 137                 return NULL;
 138         }
 139         conf->bss[0] = bss;
 140
 141         bss->radius = os_zalloc(sizeof(*bss->radius));
 142         if (bss->radius == NULL) {
 143                 os_free(conf->bss);
 144                 os_free(conf);
 145                 os_free(bss);
 146                 return NULL;
 147         }
 148
 149         hostapd_config_defaults_bss(bss);
 150
 151         conf->num_bss = 1;
 152
 153         conf->beacon_int = 100;
 154         conf->rts_threshold = -1; /* use driver default: 2347 */
 155         conf->fragm_threshold = -1; /* user driver default: 2346 */
 156         conf->send_probe_response = 1;
 157         /* Set to invalid value means do not add Power Constraint IE */
 158         conf->local_pwr_constraint = -1;
 159
 160         conf->wmm_ac_params[0] = ac_be;
 161         conf->wmm_ac_params[1] = ac_bk;
 162         conf->wmm_ac_params[2] = ac_vi;
 163         conf->wmm_ac_params[3] = ac_vo;
 164
 165         conf->tx_queue[0] = txq_vo;
 166         conf->tx_queue[1] = txq_vi;
 167         conf->tx_queue[2] = txq_be;
 168         conf->tx_queue[3] = txq_bk;
 169
 170         conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED;
 171
 172         conf->ap_table_max_size = 255;
 173         conf->ap_table_expiration_time = 60;
 174
 175 #ifdef CONFIG_TESTING_OPTIONS
 176         conf->ignore_probe_probability = 0.0d;
 177         conf->ignore_auth_probability = 0.0d;
 178         conf->ignore_assoc_probability = 0.0d;
 179         conf->ignore_reassoc_probability = 0.0d;
 180         conf->corrupt_gtk_rekey_mic_probability = 0.0d;
 181 #endif /* CONFIG_TESTING_OPTIONS */
 182
 183 #ifdef CONFIG_ACS
 184         conf->acs_num_scans = 5;
 185 #endif /* CONFIG_ACS */
 186
 187         return conf;
 188 }
 189
 190
 191 int hostapd_mac_comp(const void *a, const void *b)
 192 {
 193         return os_memcmp(a, b, sizeof(macaddr));
 194 }
 195
 196
 197 int hostapd_mac_comp_empty(const void *a)
 198 {
 199         macaddr empty = { 0 };
 200         return os_memcmp(a, empty, sizeof(macaddr));
 201 }
 202
 203
 204 static int hostapd_config_read_wpa_psk(const char *fname,
 205                                        struct hostapd_ssid *ssid)
 206 {
 207         FILE *f;
 208         char buf[128], *pos;
 209         int line = 0, ret = 0, len, ok;
 210         u8 addr[ETH_ALEN];
 211         struct hostapd_wpa_psk *psk;
 212
 213         if (!fname)
 214                 return 0;
 215
 216         f = fopen(fname, "r");
 217         if (!f) {
 218                 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname);
 219                 return -1;
 220         }
 221
 222         while (fgets(buf, sizeof(buf), f)) {
 223                 line++;
 224
 225                 if (buf[0] == '#')
 226                         continue;
 227                 pos = buf;
 228                 while (*pos != '\0') {
 229                         if (*pos == '\n') {
 230                                 *pos = '\0';
 231                                 break;
 232                         }
 233                         pos++;
 234                 }
 235                 if (buf[0] == '\0')
 236                         continue;
 237
 238                 if (hwaddr_aton(buf, addr)) {
 239                         wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on "
 240                                    "line %d in '%s'", buf, line, fname);
 241                         ret = -1;
 242                         break;
 243                 }
 244
 245                 psk = os_zalloc(sizeof(*psk));
 246                 if (psk == NULL) {
 247                         wpa_printf(MSG_ERROR, "WPA PSK allocation failed");
 248                         ret = -1;
 249                         break;
 250                 }
 251                 if (is_zero_ether_addr(addr))
 252                         psk->group = 1;
 253                 else
 254                         os_memcpy(psk->addr, addr, ETH_ALEN);
 255
 256                 pos = buf + 17;
 257                 if (*pos == '\0') {
 258                         wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'",
 259                                    line, fname);
 260                         os_free(psk);
 261                         ret = -1;
 262                         break;
 263                 }
 264                 pos++;
 265
 266                 ok = 0;
 267                 len = os_strlen(pos);
 268                 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0)
 269                         ok = 1;
 270                 else if (len >= 8 && len < 64) {
 271                         pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len,
 272                                     4096, psk->psk, PMK_LEN);
 273                         ok = 1;
 274                 }
 275                 if (!ok) {
 276                         wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in "
 277                                    "'%s'", pos, line, fname);
 278                         os_free(psk);
 279                         ret = -1;
 280                         break;
 281                 }
 282
 283                 psk->next = ssid->wpa_psk;
 284                 ssid->wpa_psk = psk;
 285         }
 286
 287         fclose(f);
 288
 289         return ret;
 290 }
 291
 292
 293 static int hostapd_derive_psk(struct hostapd_ssid *ssid)
 294 {
 295         ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 296         if (ssid->wpa_psk == NULL) {
 297                 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK");
 298                 return -1;
 299         }
 300         wpa_hexdump_ascii(MSG_DEBUG, "SSID",
 301                           (u8 *) ssid->ssid, ssid->ssid_len);
 302         wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)",
 303                               (u8 *) ssid->wpa_passphrase,
 304                               os_strlen(ssid->wpa_passphrase));
 305         pbkdf2_sha1(ssid->wpa_passphrase,
 306                     ssid->ssid, ssid->ssid_len,
 307                     4096, ssid->wpa_psk->psk, PMK_LEN);
 308         wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)",
 309                         ssid->wpa_psk->psk, PMK_LEN);
 310         return 0;
 311 }
 312
 313
 314 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf)
 315 {
 316         struct hostapd_ssid *ssid = &conf->ssid;
 317
 318         if (ssid->wpa_passphrase != NULL) {
 319                 if (ssid->wpa_psk != NULL) {
 320                         wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK "
 321                                    "instead of passphrase");
 322                 } else {
 323                         wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on "
 324                                    "passphrase");
 325                         if (hostapd_derive_psk(ssid) < 0)
 326                                 return -1;
 327                 }
 328                 ssid->wpa_psk->group = 1;
 329         }
 330
 331         if (ssid->wpa_psk_file) {
 332                 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file,
 333                                                 &conf->ssid))
 334                         return -1;
 335         }
 336
 337         return 0;
 338 }
 339
 340
 341 int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b)
 342 {
 343         int i;
 344
 345         if (a->idx != b->idx || a->default_len != b->default_len)
 346                 return 1;
 347         for (i = 0; i < NUM_WEP_KEYS; i++)
 348                 if (a->len[i] != b->len[i] ||
 349                     os_memcmp(a->key[i], b->key[i], a->len[i]) != 0)
 350                         return 1;
 351         return 0;
 352 }
 353
 354
 355 static void hostapd_config_free_radius(struct hostapd_radius_server *servers,
 356                                        int num_servers)
 357 {
 358         int i;
 359
 360         for (i = 0; i < num_servers; i++) {
 361                 os_free(servers[i].shared_secret);
 362         }
 363         os_free(servers);
 364 }
 365
 366
 367 struct hostapd_radius_attr *
 368 hostapd_config_get_radius_attr(struct hostapd_radius_attr *attr, u8 type)
 369 {
 370         for (; attr; attr = attr->next) {
 371                 if (attr->type == type)
 372                         return attr;
 373         }
 374         return NULL;
 375 }
 376
 377
 378 static void hostapd_config_free_radius_attr(struct hostapd_radius_attr *attr)
 379 {
 380         struct hostapd_radius_attr *prev;
 381
 382         while (attr) {
 383                 prev = attr;
 384                 attr = attr->next;
 385                 wpabuf_free(prev->val);
 386                 os_free(prev);
 387         }
 388 }
 389
 390
 391 static void hostapd_config_free_eap_user(struct hostapd_eap_user *user)
 392 {
 393         os_free(user->identity);
 394         os_free(user->password);
 395         os_free(user);
 396 }
 397
 398
 399 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys)
 400 {
 401         int i;
 402         for (i = 0; i < NUM_WEP_KEYS; i++) {
 403                 os_free(keys->key[i]);
 404                 keys->key[i] = NULL;
 405         }
 406 }
 407
 408
 409 void hostapd_config_free_bss(struct hostapd_bss_config *conf)
 410 {
 411         struct hostapd_wpa_psk *psk, *prev;
 412         struct hostapd_eap_user *user, *prev_user;
 413
 414         if (conf == NULL)
 415                 return;
 416
 417         psk = conf->ssid.wpa_psk;
 418         while (psk) {
 419                 prev = psk;
 420                 psk = psk->next;
 421                 os_free(prev);
 422         }
 423
 424         os_free(conf->ssid.wpa_passphrase);
 425         os_free(conf->ssid.wpa_psk_file);
 426         hostapd_config_free_wep(&conf->ssid.wep);
 427 #ifdef CONFIG_FULL_DYNAMIC_VLAN
 428         os_free(conf->ssid.vlan_tagged_interface);
 429 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
 430
 431         user = conf->eap_user;
 432         while (user) {
 433                 prev_user = user;
 434                 user = user->next;
 435                 hostapd_config_free_eap_user(prev_user);
 436         }
 437         os_free(conf->eap_user_sqlite);
 438
 439         os_free(conf->eap_req_id_text);
 440         os_free(conf->accept_mac);
 441         os_free(conf->deny_mac);
 442         os_free(conf->nas_identifier);
 443         if (conf->radius) {
 444                 hostapd_config_free_radius(conf->radius->auth_servers,
 445                                            conf->radius->num_auth_servers);
 446                 hostapd_config_free_radius(conf->radius->acct_servers,
 447                                            conf->radius->num_acct_servers);
 448         }
 449         hostapd_config_free_radius_attr(conf->radius_auth_req_attr);
 450         hostapd_config_free_radius_attr(conf->radius_acct_req_attr);
 451         os_free(conf->rsn_preauth_interfaces);
 452         os_free(conf->ctrl_interface);
 453         os_free(conf->ca_cert);
 454         os_free(conf->server_cert);
 455         os_free(conf->private_key);
 456         os_free(conf->private_key_passwd);
 457         os_free(conf->ocsp_stapling_response);
 458         os_free(conf->dh_file);
 459         os_free(conf->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->test_socket);
 465         os_free(conf->radius);
 466         os_free(conf->radius_das_shared_secret);
 467         hostapd_config_free_vlan(conf);
 468         os_free(conf->time_zone);
 469
 470 #ifdef CONFIG_IEEE80211R
 471         {
 472                 struct ft_remote_r0kh *r0kh, *r0kh_prev;
 473                 struct ft_remote_r1kh *r1kh, *r1kh_prev;
 474
 475                 r0kh = conf->r0kh_list;
 476                 conf->r0kh_list = NULL;
 477                 while (r0kh) {
 478                         r0kh_prev = r0kh;
 479                         r0kh = r0kh->next;
 480                         os_free(r0kh_prev);
 481                 }
 482
 483                 r1kh = conf->r1kh_list;
 484                 conf->r1kh_list = NULL;
 485                 while (r1kh) {
 486                         r1kh_prev = r1kh;
 487                         r1kh = r1kh->next;
 488                         os_free(r1kh_prev);
 489                 }
 490         }
 491 #endif /* CONFIG_IEEE80211R */
 492
 493 #ifdef CONFIG_WPS
 494         os_free(conf->wps_pin_requests);
 495         os_free(conf->device_name);
 496         os_free(conf->manufacturer);
 497         os_free(conf->model_name);
 498         os_free(conf->model_number);
 499         os_free(conf->serial_number);
 500         os_free(conf->config_methods);
 501         os_free(conf->ap_pin);
 502         os_free(conf->extra_cred);
 503         os_free(conf->ap_settings);
 504         os_free(conf->upnp_iface);
 505         os_free(conf->friendly_name);
 506         os_free(conf->manufacturer_url);
 507         os_free(conf->model_description);
 508         os_free(conf->model_url);
 509         os_free(conf->upc);
 510         wpabuf_free(conf->wps_nfc_dh_pubkey);
 511         wpabuf_free(conf->wps_nfc_dh_privkey);
 512         wpabuf_free(conf->wps_nfc_dev_pw);
 513 #endif /* CONFIG_WPS */
 514
 515         os_free(conf->roaming_consortium);
 516         os_free(conf->venue_name);
 517         os_free(conf->nai_realm_data);
 518         os_free(conf->network_auth_type);
 519         os_free(conf->anqp_3gpp_cell_net);
 520         os_free(conf->domain_name);
 521
 522 #ifdef CONFIG_RADIUS_TEST
 523         os_free(conf->dump_msk_file);
 524 #endif /* CONFIG_RADIUS_TEST */
 525
 526 #ifdef CONFIG_HS20
 527         os_free(conf->hs20_oper_friendly_name);
 528         os_free(conf->hs20_wan_metrics);
 529         os_free(conf->hs20_connection_capability);
 530         os_free(conf->hs20_operating_class);
 531 #endif /* CONFIG_HS20 */
 532
 533         wpabuf_free(conf->vendor_elements);
 534
 535         os_free(conf->sae_groups);
 536
 537         os_free(conf->server_id);
 538
 539         os_free(conf);
 540 }
 541
 542
 543 /**
 544  * hostapd_config_free - Free hostapd configuration
 545  * @conf: Configuration data from hostapd_config_read().
 546  */
 547 void hostapd_config_free(struct hostapd_config *conf)
 548 {
 549         size_t i;
 550
 551         if (conf == NULL)
 552                 return;
 553
 554         for (i = 0; i < conf->num_bss; i++)
 555                 hostapd_config_free_bss(conf->bss[i]);
 556         os_free(conf->bss);
 557         os_free(conf->supported_rates);
 558         os_free(conf->basic_rates);
 559
 560         os_free(conf);
 561 }
 562
 563
 564 /**
 565  * hostapd_maclist_found - Find a MAC address from a list
 566  * @list: MAC address list
 567  * @num_entries: Number of addresses in the list
 568  * @addr: Address to search for
 569  * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed
 570  * Returns: 1 if address is in the list or 0 if not.
 571  *
 572  * Perform a binary search for given MAC address from a pre-sorted list.
 573  */
 574 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries,
 575                           const u8 *addr, int *vlan_id)
 576 {
 577         int start, end, middle, res;
 578
 579         start = 0;
 580         end = num_entries - 1;
 581
 582         while (start <= end) {
 583                 middle = (start + end) / 2;
 584                 res = os_memcmp(list[middle].addr, addr, ETH_ALEN);
 585                 if (res == 0) {
 586                         if (vlan_id)
 587                                 *vlan_id = list[middle].vlan_id;
 588                         return 1;
 589                 }
 590                 if (res < 0)
 591                         start = middle + 1;
 592                 else
 593                         end = middle - 1;
 594         }
 595
 596         return 0;
 597 }
 598
 599
 600 int hostapd_rate_found(int *list, int rate)
 601 {
 602         int i;
 603
 604         if (list == NULL)
 605                 return 0;
 606
 607         for (i = 0; list[i] >= 0; i++)
 608                 if (list[i] == rate)
 609                         return 1;
 610
 611         return 0;
 612 }
 613
 614
 615 int hostapd_vlan_id_valid(struct hostapd_vlan *vlan, int vlan_id)
 616 {
 617         struct hostapd_vlan *v = vlan;
 618         while (v) {
 619                 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD)
 620                         return 1;
 621                 v = v->next;
 622         }
 623         return 0;
 624 }
 625
 626
 627 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id)
 628 {
 629         struct hostapd_vlan *v = vlan;
 630         while (v) {
 631                 if (v->vlan_id == vlan_id)
 632                         return v->ifname;
 633                 v = v->next;
 634         }
 635         return NULL;
 636 }
 637
 638
 639 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf,
 640                            const u8 *addr, const u8 *p2p_dev_addr,
 641                            const u8 *prev_psk)
 642 {
 643         struct hostapd_wpa_psk *psk;
 644         int next_ok = prev_psk == NULL;
 645
 646         if (p2p_dev_addr) {
 647                 wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR
 648                            " p2p_dev_addr=" MACSTR " prev_psk=%p",
 649                            MAC2STR(addr), MAC2STR(p2p_dev_addr), prev_psk);
 650                 if (!is_zero_ether_addr(p2p_dev_addr))
 651                         addr = NULL; /* Use P2P Device Address for matching */
 652         } else {
 653                 wpa_printf(MSG_DEBUG, "Searching a PSK for " MACSTR
 654                            " prev_psk=%p",
 655                            MAC2STR(addr), prev_psk);
 656         }
 657
 658         for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) {
 659                 if (next_ok &&
 660                     (psk->group ||
 661                      (addr && os_memcmp(psk->addr, addr, ETH_ALEN) == 0) ||
 662                      (!addr && p2p_dev_addr &&
 663                       os_memcmp(psk->p2p_dev_addr, p2p_dev_addr, ETH_ALEN) ==
 664                       0)))
 665                         return psk->psk;
 666
 667                 if (psk->psk == prev_psk)
 668                         next_ok = 1;
 669         }
 670
 671         return NULL;
 672 }
 673
 674
 675 static int hostapd_config_check_bss(struct hostapd_bss_config *bss,
 676                                     struct hostapd_config *conf,
 677                                     int full_config)
 678 {
 679         if (full_config && bss->ieee802_1x && !bss->eap_server &&
 680             !bss->radius->auth_servers) {
 681                 wpa_printf(MSG_ERROR, "Invalid IEEE 802.1X configuration (no "
 682                            "EAP authenticator configured).");
 683                 return -1;
 684         }
 685
 686         if (bss->wpa) {
 687                 int wep, i;
 688
 689                 wep = bss->default_wep_key_len > 0 ||
 690                        bss->individual_wep_key_len > 0;
 691                 for (i = 0; i < NUM_WEP_KEYS; i++) {
 692                         if (bss->ssid.wep.keys_set) {
 693                                 wep = 1;
 694                                 break;
 695                         }
 696                 }
 697
 698                 if (wep) {
 699                         wpa_printf(MSG_ERROR, "WEP configuration in a WPA network is not supported");
 700                         return -1;
 701                 }
 702         }
 703
 704         if (full_config && bss->wpa &&
 705             bss->wpa_psk_radius != PSK_RADIUS_IGNORED &&
 706             bss->macaddr_acl != USE_EXTERNAL_RADIUS_AUTH) {
 707                 wpa_printf(MSG_ERROR, "WPA-PSK using RADIUS enabled, but no "
 708                            "RADIUS checking (macaddr_acl=2) enabled.");
 709                 return -1;
 710         }
 711
 712         if (full_config && bss->wpa && (bss->wpa_key_mgmt & WPA_KEY_MGMT_PSK) &&
 713             bss->ssid.wpa_psk == NULL && bss->ssid.wpa_passphrase == NULL &&
 714             bss->ssid.wpa_psk_file == NULL &&
 715             (bss->wpa_psk_radius != PSK_RADIUS_REQUIRED ||
 716              bss->macaddr_acl != USE_EXTERNAL_RADIUS_AUTH)) {
 717                 wpa_printf(MSG_ERROR, "WPA-PSK enabled, but PSK or passphrase "
 718                            "is not configured.");
 719                 return -1;
 720         }
 721
 722         if (full_config && hostapd_mac_comp_empty(bss->bssid) != 0) {
 723                 size_t i;
 724
 725                 for (i = 0; i < conf->num_bss; i++) {
 726                         if (conf->bss[i] != bss &&
 727                             (hostapd_mac_comp(conf->bss[i]->bssid,
 728                                               bss->bssid) == 0)) {
 729                                 wpa_printf(MSG_ERROR, "Duplicate BSSID " MACSTR
 730                                            " on interface '%s' and '%s'.",
 731                                            MAC2STR(bss->bssid),
 732                                            conf->bss[i]->iface, bss->iface);
 733                                 return -1;
 734                         }
 735                 }
 736         }
 737
 738 #ifdef CONFIG_IEEE80211R
 739         if (full_config && wpa_key_mgmt_ft(bss->wpa_key_mgmt) &&
 740             (bss->nas_identifier == NULL ||
 741              os_strlen(bss->nas_identifier) < 1 ||
 742              os_strlen(bss->nas_identifier) > FT_R0KH_ID_MAX_LEN)) {
 743                 wpa_printf(MSG_ERROR, "FT (IEEE 802.11r) requires "
 744                            "nas_identifier to be configured as a 1..48 octet "
 745                            "string");
 746                 return -1;
 747         }
 748 #endif /* CONFIG_IEEE80211R */
 749
 750 #ifdef CONFIG_IEEE80211N
 751         if (full_config && conf->ieee80211n &&
 752             conf->hw_mode == HOSTAPD_MODE_IEEE80211B) {
 753                 bss->disable_11n = 1;
 754                 wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) in 11b mode is not "
 755                            "allowed, disabling HT capabilites");
 756         }
 757
 758         if (full_config && conf->ieee80211n &&
 759             bss->ssid.security_policy == SECURITY_STATIC_WEP) {
 760                 bss->disable_11n = 1;
 761                 wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) with WEP is not "
 762                            "allowed, disabling HT capabilities");
 763         }
 764
 765         if (full_config && conf->ieee80211n && bss->wpa &&
 766             !(bss->wpa_pairwise & WPA_CIPHER_CCMP) &&
 767             !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP |
 768                                    WPA_CIPHER_CCMP_256 | WPA_CIPHER_GCMP_256)))
 769         {
 770                 bss->disable_11n = 1;
 771                 wpa_printf(MSG_ERROR, "HT (IEEE 802.11n) with WPA/WPA2 "
 772                            "requires CCMP/GCMP to be enabled, disabling HT "
 773                            "capabilities");
 774         }
 775 #endif /* CONFIG_IEEE80211N */
 776
 777 #ifdef CONFIG_WPS2
 778         if (full_config && bss->wps_state && bss->ignore_broadcast_ssid) {
 779                 wpa_printf(MSG_INFO, "WPS: ignore_broadcast_ssid "
 780                            "configuration forced WPS to be disabled");
 781                 bss->wps_state = 0;
 782         }
 783
 784         if (full_config && bss->wps_state &&
 785             bss->ssid.wep.keys_set && bss->wpa == 0) {
 786                 wpa_printf(MSG_INFO, "WPS: WEP configuration forced WPS to be "
 787                            "disabled");
 788                 bss->wps_state = 0;
 789         }
 790
 791         if (full_config && bss->wps_state && bss->wpa &&
 792             (!(bss->wpa & 2) ||
 793              !(bss->rsn_pairwise & WPA_CIPHER_CCMP))) {
 794                 wpa_printf(MSG_INFO, "WPS: WPA/TKIP configuration without "
 795                            "WPA2/CCMP forced WPS to be disabled");
 796                 bss->wps_state = 0;
 797         }
 798 #endif /* CONFIG_WPS2 */
 799
 800 #ifdef CONFIG_HS20
 801         if (full_config && bss->hs20 &&
 802             (!(bss->wpa & 2) ||
 803              !(bss->rsn_pairwise & (WPA_CIPHER_CCMP | WPA_CIPHER_GCMP |
 804                                     WPA_CIPHER_CCMP_256 |
 805                                     WPA_CIPHER_GCMP_256)))) {
 806                 wpa_printf(MSG_ERROR, "HS 2.0: WPA2-Enterprise/CCMP "
 807                            "configuration is required for Hotspot 2.0 "
 808                            "functionality");
 809                 return -1;
 810         }
 811 #endif /* CONFIG_HS20 */
 812
 813         return 0;
 814 }
 815
 816
 817 int hostapd_config_check(struct hostapd_config *conf, int full_config)
 818 {
 819         size_t i;
 820
 821         if (full_config && conf->ieee80211d &&
 822             (!conf->country[0] || !conf->country[1])) {
 823                 wpa_printf(MSG_ERROR, "Cannot enable IEEE 802.11d without "
 824                            "setting the country_code");
 825                 return -1;
 826         }
 827
 828         if (full_config && conf->ieee80211h && !conf->ieee80211d) {
 829                 wpa_printf(MSG_ERROR, "Cannot enable IEEE 802.11h without "
 830                            "IEEE 802.11d enabled");
 831                 return -1;
 832         }
 833
 834         if (full_config && conf->local_pwr_constraint != -1 &&
 835             !conf->ieee80211d) {
 836                 wpa_printf(MSG_ERROR, "Cannot add Power Constraint element without Country element");
 837                 return -1;
 838         }
 839
 840         if (full_config && conf->spectrum_mgmt_required &&
 841             conf->local_pwr_constraint == -1) {
 842                 wpa_printf(MSG_ERROR, "Cannot set Spectrum Management bit without Country and Power Constraint elements");
 843                 return -1;
 844         }
 845
 846         for (i = 0; i < conf->num_bss; i++) {
 847                 if (hostapd_config_check_bss(conf->bss[i], conf, full_config))
 848                         return -1;
 849         }
 850
 851         return 0;
 852 }
 853
 854
 855 void hostapd_set_security_params(struct hostapd_bss_config *bss)
 856 {
 857         if (bss->individual_wep_key_len == 0) {
 858                 /* individual keys are not use; can use key idx0 for
 859                  * broadcast keys */
 860                 bss->broadcast_key_idx_min = 0;
 861         }
 862
 863         if ((bss->wpa & 2) && bss->rsn_pairwise == 0)
 864                 bss->rsn_pairwise = bss->wpa_pairwise;
 865         bss->wpa_group = wpa_select_ap_group_cipher(bss->wpa, bss->wpa_pairwise,
 866                                                     bss->rsn_pairwise);
 867
 868         bss->radius->auth_server = bss->radius->auth_servers;
 869         bss->radius->acct_server = bss->radius->acct_servers;
 870
 871         if (bss->wpa && bss->ieee802_1x) {
 872                 bss->ssid.security_policy = SECURITY_WPA;
 873         } else if (bss->wpa) {
 874                 bss->ssid.security_policy = SECURITY_WPA_PSK;
 875         } else if (bss->ieee802_1x) {
 876                 int cipher = WPA_CIPHER_NONE;
 877                 bss->ssid.security_policy = SECURITY_IEEE_802_1X;
 878                 bss->ssid.wep.default_len = bss->default_wep_key_len;
 879                 if (bss->default_wep_key_len)
 880                         cipher = bss->default_wep_key_len >= 13 ?
 881                                 WPA_CIPHER_WEP104 : WPA_CIPHER_WEP40;
 882                 bss->wpa_group = cipher;
 883                 bss->wpa_pairwise = cipher;
 884                 bss->rsn_pairwise = cipher;
 885         } else if (bss->ssid.wep.keys_set) {
 886                 int cipher = WPA_CIPHER_WEP40;
 887                 if (bss->ssid.wep.len[0] >= 13)
 888                         cipher = WPA_CIPHER_WEP104;
 889                 bss->ssid.security_policy = SECURITY_STATIC_WEP;
 890                 bss->wpa_group = cipher;
 891                 bss->wpa_pairwise = cipher;
 892                 bss->rsn_pairwise = cipher;
 893         } else {
 894                 bss->ssid.security_policy = SECURITY_PLAINTEXT;
 895                 bss->wpa_group = WPA_CIPHER_NONE;
 896                 bss->wpa_pairwise = WPA_CIPHER_NONE;
 897                 bss->rsn_pairwise = WPA_CIPHER_NONE;
 898         }
 899 }