src/ap/ap_config.c

   1 /*
   2  * hostapd / Configuration helper functions
   3  * Copyright (c) 2003-2012, 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
 134         bss->radius = os_zalloc(sizeof(*bss->radius));
 135         if (bss->radius == NULL) {
 136                 os_free(conf);
 137                 os_free(bss);
 138                 return NULL;
 139         }
 140
 141         hostapd_config_defaults_bss(bss);
 142
 143         conf->num_bss = 1;
 144         conf->bss = bss;
 145
 146         conf->beacon_int = 100;
 147         conf->rts_threshold = -1; /* use driver default: 2347 */
 148         conf->fragm_threshold = -1; /* user driver default: 2346 */
 149         conf->send_probe_response = 1;
 150
 151         conf->wmm_ac_params[0] = ac_be;
 152         conf->wmm_ac_params[1] = ac_bk;
 153         conf->wmm_ac_params[2] = ac_vi;
 154         conf->wmm_ac_params[3] = ac_vo;
 155
 156         conf->tx_queue[0] = txq_vo;
 157         conf->tx_queue[1] = txq_vi;
 158         conf->tx_queue[2] = txq_be;
 159         conf->tx_queue[3] = txq_bk;
 160
 161         conf->ht_capab = HT_CAP_INFO_SMPS_DISABLED;
 162
 163         conf->ap_table_max_size = 255;
 164         conf->ap_table_expiration_time = 60;
 165
 166 #ifdef CONFIG_TESTING_OPTIONS
 167         conf->ignore_probe_probability = 0.0d;
 168         conf->ignore_auth_probability = 0.0d;
 169         conf->ignore_assoc_probability = 0.0d;
 170         conf->ignore_reassoc_probability = 0.0d;
 171         conf->corrupt_gtk_rekey_mic_probability = 0.0d;
 172 #endif /* CONFIG_TESTING_OPTIONS */
 173
 174         return conf;
 175 }
 176
 177
 178 int hostapd_mac_comp(const void *a, const void *b)
 179 {
 180         return os_memcmp(a, b, sizeof(macaddr));
 181 }
 182
 183
 184 int hostapd_mac_comp_empty(const void *a)
 185 {
 186         macaddr empty = { 0 };
 187         return os_memcmp(a, empty, sizeof(macaddr));
 188 }
 189
 190
 191 static int hostapd_config_read_wpa_psk(const char *fname,
 192                                        struct hostapd_ssid *ssid)
 193 {
 194         FILE *f;
 195         char buf[128], *pos;
 196         int line = 0, ret = 0, len, ok;
 197         u8 addr[ETH_ALEN];
 198         struct hostapd_wpa_psk *psk;
 199
 200         if (!fname)
 201                 return 0;
 202
 203         f = fopen(fname, "r");
 204         if (!f) {
 205                 wpa_printf(MSG_ERROR, "WPA PSK file '%s' not found.", fname);
 206                 return -1;
 207         }
 208
 209         while (fgets(buf, sizeof(buf), f)) {
 210                 line++;
 211
 212                 if (buf[0] == '#')
 213                         continue;
 214                 pos = buf;
 215                 while (*pos != '\0') {
 216                         if (*pos == '\n') {
 217                                 *pos = '\0';
 218                                 break;
 219                         }
 220                         pos++;
 221                 }
 222                 if (buf[0] == '\0')
 223                         continue;
 224
 225                 if (hwaddr_aton(buf, addr)) {
 226                         wpa_printf(MSG_ERROR, "Invalid MAC address '%s' on "
 227                                    "line %d in '%s'", buf, line, fname);
 228                         ret = -1;
 229                         break;
 230                 }
 231
 232                 psk = os_zalloc(sizeof(*psk));
 233                 if (psk == NULL) {
 234                         wpa_printf(MSG_ERROR, "WPA PSK allocation failed");
 235                         ret = -1;
 236                         break;
 237                 }
 238                 if (is_zero_ether_addr(addr))
 239                         psk->group = 1;
 240                 else
 241                         os_memcpy(psk->addr, addr, ETH_ALEN);
 242
 243                 pos = buf + 17;
 244                 if (*pos == '\0') {
 245                         wpa_printf(MSG_ERROR, "No PSK on line %d in '%s'",
 246                                    line, fname);
 247                         os_free(psk);
 248                         ret = -1;
 249                         break;
 250                 }
 251                 pos++;
 252
 253                 ok = 0;
 254                 len = os_strlen(pos);
 255                 if (len == 64 && hexstr2bin(pos, psk->psk, PMK_LEN) == 0)
 256                         ok = 1;
 257                 else if (len >= 8 && len < 64) {
 258                         pbkdf2_sha1(pos, ssid->ssid, ssid->ssid_len,
 259                                     4096, psk->psk, PMK_LEN);
 260                         ok = 1;
 261                 }
 262                 if (!ok) {
 263                         wpa_printf(MSG_ERROR, "Invalid PSK '%s' on line %d in "
 264                                    "'%s'", pos, line, fname);
 265                         os_free(psk);
 266                         ret = -1;
 267                         break;
 268                 }
 269
 270                 psk->next = ssid->wpa_psk;
 271                 ssid->wpa_psk = psk;
 272         }
 273
 274         fclose(f);
 275
 276         return ret;
 277 }
 278
 279
 280 static int hostapd_derive_psk(struct hostapd_ssid *ssid)
 281 {
 282         ssid->wpa_psk = os_zalloc(sizeof(struct hostapd_wpa_psk));
 283         if (ssid->wpa_psk == NULL) {
 284                 wpa_printf(MSG_ERROR, "Unable to alloc space for PSK");
 285                 return -1;
 286         }
 287         wpa_hexdump_ascii(MSG_DEBUG, "SSID",
 288                           (u8 *) ssid->ssid, ssid->ssid_len);
 289         wpa_hexdump_ascii_key(MSG_DEBUG, "PSK (ASCII passphrase)",
 290                               (u8 *) ssid->wpa_passphrase,
 291                               os_strlen(ssid->wpa_passphrase));
 292         pbkdf2_sha1(ssid->wpa_passphrase,
 293                     ssid->ssid, ssid->ssid_len,
 294                     4096, ssid->wpa_psk->psk, PMK_LEN);
 295         wpa_hexdump_key(MSG_DEBUG, "PSK (from passphrase)",
 296                         ssid->wpa_psk->psk, PMK_LEN);
 297         return 0;
 298 }
 299
 300
 301 int hostapd_setup_wpa_psk(struct hostapd_bss_config *conf)
 302 {
 303         struct hostapd_ssid *ssid = &conf->ssid;
 304
 305         if (ssid->wpa_passphrase != NULL) {
 306                 if (ssid->wpa_psk != NULL) {
 307                         wpa_printf(MSG_DEBUG, "Using pre-configured WPA PSK "
 308                                    "instead of passphrase");
 309                 } else {
 310                         wpa_printf(MSG_DEBUG, "Deriving WPA PSK based on "
 311                                    "passphrase");
 312                         if (hostapd_derive_psk(ssid) < 0)
 313                                 return -1;
 314                 }
 315                 ssid->wpa_psk->group = 1;
 316         }
 317
 318         if (ssid->wpa_psk_file) {
 319                 if (hostapd_config_read_wpa_psk(ssid->wpa_psk_file,
 320                                                 &conf->ssid))
 321                         return -1;
 322         }
 323
 324         return 0;
 325 }
 326
 327
 328 int hostapd_wep_key_cmp(struct hostapd_wep_keys *a, struct hostapd_wep_keys *b)
 329 {
 330         int i;
 331
 332         if (a->idx != b->idx || a->default_len != b->default_len)
 333                 return 1;
 334         for (i = 0; i < NUM_WEP_KEYS; i++)
 335                 if (a->len[i] != b->len[i] ||
 336                     os_memcmp(a->key[i], b->key[i], a->len[i]) != 0)
 337                         return 1;
 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 static void hostapd_config_free_eap_user(struct hostapd_eap_user *user)
 379 {
 380         os_free(user->identity);
 381         os_free(user->password);
 382         os_free(user);
 383 }
 384
 385
 386 static void hostapd_config_free_wep(struct hostapd_wep_keys *keys)
 387 {
 388         int i;
 389         for (i = 0; i < NUM_WEP_KEYS; i++) {
 390                 os_free(keys->key[i]);
 391                 keys->key[i] = NULL;
 392         }
 393 }
 394
 395
 396 static void hostapd_config_free_bss(struct hostapd_bss_config *conf)
 397 {
 398         struct hostapd_wpa_psk *psk, *prev;
 399         struct hostapd_eap_user *user, *prev_user;
 400
 401         if (conf == NULL)
 402                 return;
 403
 404         psk = conf->ssid.wpa_psk;
 405         while (psk) {
 406                 prev = psk;
 407                 psk = psk->next;
 408                 os_free(prev);
 409         }
 410
 411         os_free(conf->ssid.wpa_passphrase);
 412         os_free(conf->ssid.wpa_psk_file);
 413         hostapd_config_free_wep(&conf->ssid.wep);
 414 #ifdef CONFIG_FULL_DYNAMIC_VLAN
 415         os_free(conf->ssid.vlan_tagged_interface);
 416 #endif /* CONFIG_FULL_DYNAMIC_VLAN */
 417
 418         user = conf->eap_user;
 419         while (user) {
 420                 prev_user = user;
 421                 user = user->next;
 422                 hostapd_config_free_eap_user(prev_user);
 423         }
 424         os_free(conf->eap_user_sqlite);
 425
 426         os_free(conf->dump_log_name);
 427         os_free(conf->eap_req_id_text);
 428         os_free(conf->accept_mac);
 429         os_free(conf->deny_mac);
 430         os_free(conf->nas_identifier);
 431         hostapd_config_free_radius(conf->radius->auth_servers,
 432                                    conf->radius->num_auth_servers);
 433         hostapd_config_free_radius(conf->radius->acct_servers,
 434                                    conf->radius->num_acct_servers);
 435         hostapd_config_free_radius_attr(conf->radius_auth_req_attr);
 436         hostapd_config_free_radius_attr(conf->radius_acct_req_attr);
 437         os_free(conf->rsn_preauth_interfaces);
 438         os_free(conf->ctrl_interface);
 439         os_free(conf->ca_cert);
 440         os_free(conf->server_cert);
 441         os_free(conf->private_key);
 442         os_free(conf->private_key_passwd);
 443         os_free(conf->dh_file);
 444         os_free(conf->pac_opaque_encr_key);
 445         os_free(conf->eap_fast_a_id);
 446         os_free(conf->eap_fast_a_id_info);
 447         os_free(conf->eap_sim_db);
 448         os_free(conf->radius_server_clients);
 449         os_free(conf->test_socket);
 450         os_free(conf->radius);
 451         os_free(conf->radius_das_shared_secret);
 452         hostapd_config_free_vlan(conf);
 453         if (conf->ssid.dyn_vlan_keys) {
 454                 struct hostapd_ssid *ssid = &conf->ssid;
 455                 size_t i;
 456                 for (i = 0; i <= ssid->max_dyn_vlan_keys; i++) {
 457                         if (ssid->dyn_vlan_keys[i] == NULL)
 458                                 continue;
 459                         hostapd_config_free_wep(ssid->dyn_vlan_keys[i]);
 460                         os_free(ssid->dyn_vlan_keys[i]);
 461                 }
 462                 os_free(ssid->dyn_vlan_keys);
 463                 ssid->dyn_vlan_keys = NULL;
 464         }
 465
 466         os_free(conf->time_zone);
 467
 468 #ifdef CONFIG_IEEE80211R
 469         {
 470                 struct ft_remote_r0kh *r0kh, *r0kh_prev;
 471                 struct ft_remote_r1kh *r1kh, *r1kh_prev;
 472
 473                 r0kh = conf->r0kh_list;
 474                 conf->r0kh_list = NULL;
 475                 while (r0kh) {
 476                         r0kh_prev = r0kh;
 477                         r0kh = r0kh->next;
 478                         os_free(r0kh_prev);
 479                 }
 480
 481                 r1kh = conf->r1kh_list;
 482                 conf->r1kh_list = NULL;
 483                 while (r1kh) {
 484                         r1kh_prev = r1kh;
 485                         r1kh = r1kh->next;
 486                         os_free(r1kh_prev);
 487                 }
 488         }
 489 #endif /* CONFIG_IEEE80211R */
 490
 491 #ifdef CONFIG_WPS
 492         os_free(conf->wps_pin_requests);
 493         os_free(conf->device_name);
 494         os_free(conf->manufacturer);
 495         os_free(conf->model_name);
 496         os_free(conf->model_number);
 497         os_free(conf->serial_number);
 498         os_free(conf->config_methods);
 499         os_free(conf->ap_pin);
 500         os_free(conf->extra_cred);
 501         os_free(conf->ap_settings);
 502         os_free(conf->upnp_iface);
 503         os_free(conf->friendly_name);
 504         os_free(conf->manufacturer_url);
 505         os_free(conf->model_description);
 506         os_free(conf->model_url);
 507         os_free(conf->upc);
 508         wpabuf_free(conf->wps_nfc_dh_pubkey);
 509         wpabuf_free(conf->wps_nfc_dh_privkey);
 510         wpabuf_free(conf->wps_nfc_dev_pw);
 511 #endif /* CONFIG_WPS */
 512
 513         os_free(conf->roaming_consortium);
 514         os_free(conf->venue_name);
 515         os_free(conf->nai_realm_data);
 516         os_free(conf->network_auth_type);
 517         os_free(conf->anqp_3gpp_cell_net);
 518         os_free(conf->domain_name);
 519
 520 #ifdef CONFIG_RADIUS_TEST
 521         os_free(conf->dump_msk_file);
 522 #endif /* CONFIG_RADIUS_TEST */
 523
 524 #ifdef CONFIG_HS20
 525         os_free(conf->hs20_oper_friendly_name);
 526         os_free(conf->hs20_wan_metrics);
 527         os_free(conf->hs20_connection_capability);
 528         os_free(conf->hs20_operating_class);
 529 #endif /* CONFIG_HS20 */
 530
 531         wpabuf_free(conf->vendor_elements);
 532
 533         os_free(conf->sae_groups);
 534 }
 535
 536
 537 /**
 538  * hostapd_config_free - Free hostapd configuration
 539  * @conf: Configuration data from hostapd_config_read().
 540  */
 541 void hostapd_config_free(struct hostapd_config *conf)
 542 {
 543         size_t i;
 544
 545         if (conf == NULL)
 546                 return;
 547
 548         for (i = 0; i < conf->num_bss; i++)
 549                 hostapd_config_free_bss(&conf->bss[i]);
 550         os_free(conf->bss);
 551         os_free(conf->supported_rates);
 552         os_free(conf->basic_rates);
 553
 554         os_free(conf);
 555 }
 556
 557
 558 /**
 559  * hostapd_maclist_found - Find a MAC address from a list
 560  * @list: MAC address list
 561  * @num_entries: Number of addresses in the list
 562  * @addr: Address to search for
 563  * @vlan_id: Buffer for returning VLAN ID or %NULL if not needed
 564  * Returns: 1 if address is in the list or 0 if not.
 565  *
 566  * Perform a binary search for given MAC address from a pre-sorted list.
 567  */
 568 int hostapd_maclist_found(struct mac_acl_entry *list, int num_entries,
 569                           const u8 *addr, int *vlan_id)
 570 {
 571         int start, end, middle, res;
 572
 573         start = 0;
 574         end = num_entries - 1;
 575
 576         while (start <= end) {
 577                 middle = (start + end) / 2;
 578                 res = os_memcmp(list[middle].addr, addr, ETH_ALEN);
 579                 if (res == 0) {
 580                         if (vlan_id)
 581                                 *vlan_id = list[middle].vlan_id;
 582                         return 1;
 583                 }
 584                 if (res < 0)
 585                         start = middle + 1;
 586                 else
 587                         end = middle - 1;
 588         }
 589
 590         return 0;
 591 }
 592
 593
 594 int hostapd_rate_found(int *list, int rate)
 595 {
 596         int i;
 597
 598         if (list == NULL)
 599                 return 0;
 600
 601         for (i = 0; list[i] >= 0; i++)
 602                 if (list[i] == rate)
 603                         return 1;
 604
 605         return 0;
 606 }
 607
 608
 609 int hostapd_vlan_id_valid(struct hostapd_vlan *vlan, int vlan_id)
 610 {
 611         struct hostapd_vlan *v = vlan;
 612         while (v) {
 613                 if (v->vlan_id == vlan_id || v->vlan_id == VLAN_ID_WILDCARD)
 614                         return 1;
 615                 v = v->next;
 616         }
 617         return 0;
 618 }
 619
 620
 621 const char * hostapd_get_vlan_id_ifname(struct hostapd_vlan *vlan, int vlan_id)
 622 {
 623         struct hostapd_vlan *v = vlan;
 624         while (v) {
 625                 if (v->vlan_id == vlan_id)
 626                         return v->ifname;
 627                 v = v->next;
 628         }
 629         return NULL;
 630 }
 631
 632
 633 const u8 * hostapd_get_psk(const struct hostapd_bss_config *conf,
 634                            const u8 *addr, const u8 *prev_psk)
 635 {
 636         struct hostapd_wpa_psk *psk;
 637         int next_ok = prev_psk == NULL;
 638
 639         for (psk = conf->ssid.wpa_psk; psk != NULL; psk = psk->next) {
 640                 if (next_ok &&
 641                     (psk->group || os_memcmp(psk->addr, addr, ETH_ALEN) == 0))
 642                         return psk->psk;
 643
 644                 if (psk->psk == prev_psk)
 645                         next_ok = 1;
 646         }
 647
 648         return NULL;
 649 }