src/ap/hostapd.c

   1 /*
   2  * hostapd / Initialization and configuration
   3  * Copyright (c) 2002-2014, 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 "utils/eloop.h"
  13 #include "common/ieee802_11_defs.h"
  14 #include "common/wpa_ctrl.h"
  15 #include "radius/radius_client.h"
  16 #include "radius/radius_das.h"
  17 #include "eap_server/tncs.h"
  18 #include "hostapd.h"
  19 #include "authsrv.h"
  20 #include "sta_info.h"
  21 #include "accounting.h"
  22 #include "ap_list.h"
  23 #include "beacon.h"
  24 #include "iapp.h"
  25 #include "ieee802_1x.h"
  26 #include "ieee802_11_auth.h"
  27 #include "vlan_init.h"
  28 #include "wpa_auth.h"
  29 #include "wps_hostapd.h"
  30 #include "hw_features.h"
  31 #include "wpa_auth_glue.h"
  32 #include "ap_drv_ops.h"
  33 #include "ap_config.h"
  34 #include "p2p_hostapd.h"
  35 #include "gas_serv.h"
  36 #include "dfs.h"
  37 #include "ieee802_11.h"
  38
  39
  40 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
  41 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  42 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
  43 static int setup_interface2(struct hostapd_iface *iface);
  44 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx);
  45
  46
  47 int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  48                                int (*cb)(struct hostapd_iface *iface,
  49                                          void *ctx), void *ctx)
  50 {
  51         size_t i;
  52         int ret;
  53
  54         for (i = 0; i < interfaces->count; i++) {
  55                 ret = cb(interfaces->iface[i], ctx);
  56                 if (ret)
  57                         return ret;
  58         }
  59
  60         return 0;
  61 }
  62
  63
  64 static void hostapd_reload_bss(struct hostapd_data *hapd)
  65 {
  66         struct hostapd_ssid *ssid;
  67
  68 #ifndef CONFIG_NO_RADIUS
  69         radius_client_reconfig(hapd->radius, hapd->conf->radius);
  70 #endif /* CONFIG_NO_RADIUS */
  71
  72         ssid = &hapd->conf->ssid;
  73         if (!ssid->wpa_psk_set && ssid->wpa_psk && !ssid->wpa_psk->next &&
  74             ssid->wpa_passphrase_set && ssid->wpa_passphrase) {
  75                 /*
  76                  * Force PSK to be derived again since SSID or passphrase may
  77                  * have changed.
  78                  */
  79                 os_free(ssid->wpa_psk);
  80                 ssid->wpa_psk = NULL;
  81         }
  82         if (hostapd_setup_wpa_psk(hapd->conf)) {
  83                 wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  84                            "after reloading configuration");
  85         }
  86
  87         if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  88                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  89         else
  90                 hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
  91
  92         if ((hapd->conf->wpa || hapd->conf->osen) && hapd->wpa_auth == NULL) {
  93                 hostapd_setup_wpa(hapd);
  94                 if (hapd->wpa_auth)
  95                         wpa_init_keys(hapd->wpa_auth);
  96         } else if (hapd->conf->wpa) {
  97                 const u8 *wpa_ie;
  98                 size_t wpa_ie_len;
  99                 hostapd_reconfig_wpa(hapd);
 100                 wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
 101                 if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
 102                         wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
 103                                    "the kernel driver.");
 104         } else if (hapd->wpa_auth) {
 105                 wpa_deinit(hapd->wpa_auth);
 106                 hapd->wpa_auth = NULL;
 107                 hostapd_set_privacy(hapd, 0);
 108                 hostapd_setup_encryption(hapd->conf->iface, hapd);
 109                 hostapd_set_generic_elem(hapd, (u8 *) "", 0);
 110         }
 111
 112         ieee802_11_set_beacon(hapd);
 113         hostapd_update_wps(hapd);
 114
 115         if (hapd->conf->ssid.ssid_set &&
 116             hostapd_set_ssid(hapd, hapd->conf->ssid.ssid,
 117                              hapd->conf->ssid.ssid_len)) {
 118                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 119                 /* try to continue */
 120         }
 121         wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
 122 }
 123
 124
 125 static void hostapd_clear_old(struct hostapd_iface *iface)
 126 {
 127         size_t j;
 128
 129         /*
 130          * Deauthenticate all stations since the new configuration may not
 131          * allow them to use the BSS anymore.
 132          */
 133         for (j = 0; j < iface->num_bss; j++) {
 134                 hostapd_flush_old_stations(iface->bss[j],
 135                                            WLAN_REASON_PREV_AUTH_NOT_VALID);
 136                 hostapd_broadcast_wep_clear(iface->bss[j]);
 137
 138 #ifndef CONFIG_NO_RADIUS
 139                 /* TODO: update dynamic data based on changed configuration
 140                  * items (e.g., open/close sockets, etc.) */
 141                 radius_client_flush(iface->bss[j]->radius, 0);
 142 #endif /* CONFIG_NO_RADIUS */
 143         }
 144 }
 145
 146
 147 int hostapd_reload_config(struct hostapd_iface *iface)
 148 {
 149         struct hostapd_data *hapd = iface->bss[0];
 150         struct hostapd_config *newconf, *oldconf;
 151         size_t j;
 152
 153         if (iface->config_fname == NULL) {
 154                 /* Only in-memory config in use - assume it has been updated */
 155                 hostapd_clear_old(iface);
 156                 for (j = 0; j < iface->num_bss; j++)
 157                         hostapd_reload_bss(iface->bss[j]);
 158                 return 0;
 159         }
 160
 161         if (iface->interfaces == NULL ||
 162             iface->interfaces->config_read_cb == NULL)
 163                 return -1;
 164         newconf = iface->interfaces->config_read_cb(iface->config_fname);
 165         if (newconf == NULL)
 166                 return -1;
 167
 168         hostapd_clear_old(iface);
 169
 170         oldconf = hapd->iconf;
 171         iface->conf = newconf;
 172
 173         for (j = 0; j < iface->num_bss; j++) {
 174                 hapd = iface->bss[j];
 175                 hapd->iconf = newconf;
 176                 hapd->iconf->channel = oldconf->channel;
 177                 hapd->iconf->secondary_channel = oldconf->secondary_channel;
 178                 hapd->iconf->ieee80211n = oldconf->ieee80211n;
 179                 hapd->iconf->ieee80211ac = oldconf->ieee80211ac;
 180                 hapd->iconf->ht_capab = oldconf->ht_capab;
 181                 hapd->iconf->vht_capab = oldconf->vht_capab;
 182                 hapd->iconf->vht_oper_chwidth = oldconf->vht_oper_chwidth;
 183                 hapd->iconf->vht_oper_centr_freq_seg0_idx =
 184                         oldconf->vht_oper_centr_freq_seg0_idx;
 185                 hapd->iconf->vht_oper_centr_freq_seg1_idx =
 186                         oldconf->vht_oper_centr_freq_seg1_idx;
 187                 hapd->conf = newconf->bss[j];
 188                 hostapd_reload_bss(hapd);
 189         }
 190
 191         hostapd_config_free(oldconf);
 192
 193
 194         return 0;
 195 }
 196
 197
 198 static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
 199                                               char *ifname)
 200 {
 201         int i;
 202
 203         for (i = 0; i < NUM_WEP_KEYS; i++) {
 204                 if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
 205                                         0, NULL, 0, NULL, 0)) {
 206                         wpa_printf(MSG_DEBUG, "Failed to clear default "
 207                                    "encryption keys (ifname=%s keyidx=%d)",
 208                                    ifname, i);
 209                 }
 210         }
 211 #ifdef CONFIG_IEEE80211W
 212         if (hapd->conf->ieee80211w) {
 213                 for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
 214                         if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
 215                                                 NULL, i, 0, NULL,
 216                                                 0, NULL, 0)) {
 217                                 wpa_printf(MSG_DEBUG, "Failed to clear "
 218                                            "default mgmt encryption keys "
 219                                            "(ifname=%s keyidx=%d)", ifname, i);
 220                         }
 221                 }
 222         }
 223 #endif /* CONFIG_IEEE80211W */
 224 }
 225
 226
 227 static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
 228 {
 229         hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
 230         return 0;
 231 }
 232
 233
 234 static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
 235 {
 236         int errors = 0, idx;
 237         struct hostapd_ssid *ssid = &hapd->conf->ssid;
 238
 239         idx = ssid->wep.idx;
 240         if (ssid->wep.default_len &&
 241             hostapd_drv_set_key(hapd->conf->iface,
 242                                 hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
 243                                 1, NULL, 0, ssid->wep.key[idx],
 244                                 ssid->wep.len[idx])) {
 245                 wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
 246                 errors++;
 247         }
 248
 249         return errors;
 250 }
 251
 252
 253 static void hostapd_free_hapd_data(struct hostapd_data *hapd)
 254 {
 255         if (!hapd->started) {
 256                 wpa_printf(MSG_ERROR, "%s: Interface %s wasn't started",
 257                            __func__, hapd->conf->iface);
 258                 return;
 259         }
 260         hapd->started = 0;
 261
 262         wpa_printf(MSG_DEBUG, "%s(%s)", __func__, hapd->conf->iface);
 263         iapp_deinit(hapd->iapp);
 264         hapd->iapp = NULL;
 265         accounting_deinit(hapd);
 266         hostapd_deinit_wpa(hapd);
 267         vlan_deinit(hapd);
 268         hostapd_acl_deinit(hapd);
 269 #ifndef CONFIG_NO_RADIUS
 270         radius_client_deinit(hapd->radius);
 271         hapd->radius = NULL;
 272         radius_das_deinit(hapd->radius_das);
 273         hapd->radius_das = NULL;
 274 #endif /* CONFIG_NO_RADIUS */
 275
 276         hostapd_deinit_wps(hapd);
 277
 278         authsrv_deinit(hapd);
 279
 280         if (hapd->interface_added) {
 281                 hapd->interface_added = 0;
 282                 if (hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
 283                         wpa_printf(MSG_WARNING,
 284                                    "Failed to remove BSS interface %s",
 285                                    hapd->conf->iface);
 286                         hapd->interface_added = 1;
 287                 }
 288         }
 289
 290         os_free(hapd->probereq_cb);
 291         hapd->probereq_cb = NULL;
 292
 293 #ifdef CONFIG_P2P
 294         wpabuf_free(hapd->p2p_beacon_ie);
 295         hapd->p2p_beacon_ie = NULL;
 296         wpabuf_free(hapd->p2p_probe_resp_ie);
 297         hapd->p2p_probe_resp_ie = NULL;
 298 #endif /* CONFIG_P2P */
 299
 300         wpabuf_free(hapd->time_adv);
 301
 302 #ifdef CONFIG_INTERWORKING
 303         gas_serv_deinit(hapd);
 304 #endif /* CONFIG_INTERWORKING */
 305
 306 #ifdef CONFIG_SQLITE
 307         os_free(hapd->tmp_eap_user.identity);
 308         os_free(hapd->tmp_eap_user.password);
 309 #endif /* CONFIG_SQLITE */
 310 }
 311
 312
 313 /**
 314  * hostapd_cleanup - Per-BSS cleanup (deinitialization)
 315  * @hapd: Pointer to BSS data
 316  *
 317  * This function is used to free all per-BSS data structures and resources.
 318  * Most of the modules that are initialized in hostapd_setup_bss() are
 319  * deinitialized here.
 320  */
 321 static void hostapd_cleanup(struct hostapd_data *hapd)
 322 {
 323         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s))", __func__, hapd,
 324                    hapd->conf->iface);
 325         if (hapd->iface->interfaces &&
 326             hapd->iface->interfaces->ctrl_iface_deinit)
 327                 hapd->iface->interfaces->ctrl_iface_deinit(hapd);
 328         hostapd_free_hapd_data(hapd);
 329 }
 330
 331
 332 static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
 333 {
 334         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 335         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
 336         iface->hw_features = NULL;
 337         os_free(iface->current_rates);
 338         iface->current_rates = NULL;
 339         os_free(iface->basic_rates);
 340         iface->basic_rates = NULL;
 341         ap_list_deinit(iface);
 342 }
 343
 344
 345 /**
 346  * hostapd_cleanup_iface - Complete per-interface cleanup
 347  * @iface: Pointer to interface data
 348  *
 349  * This function is called after per-BSS data structures are deinitialized
 350  * with hostapd_cleanup().
 351  */
 352 static void hostapd_cleanup_iface(struct hostapd_iface *iface)
 353 {
 354         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
 355         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
 356
 357         hostapd_cleanup_iface_partial(iface);
 358         hostapd_config_free(iface->conf);
 359         iface->conf = NULL;
 360
 361         os_free(iface->config_fname);
 362         os_free(iface->bss);
 363         wpa_printf(MSG_DEBUG, "%s: free iface=%p", __func__, iface);
 364         os_free(iface);
 365 }
 366
 367
 368 static void hostapd_clear_wep(struct hostapd_data *hapd)
 369 {
 370         if (hapd->drv_priv && !hapd->iface->driver_ap_teardown) {
 371                 hostapd_set_privacy(hapd, 0);
 372                 hostapd_broadcast_wep_clear(hapd);
 373         }
 374 }
 375
 376
 377 static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
 378 {
 379         int i;
 380
 381         hostapd_broadcast_wep_set(hapd);
 382
 383         if (hapd->conf->ssid.wep.default_len) {
 384                 hostapd_set_privacy(hapd, 1);
 385                 return 0;
 386         }
 387
 388         /*
 389          * When IEEE 802.1X is not enabled, the driver may need to know how to
 390          * set authentication algorithms for static WEP.
 391          */
 392         hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
 393
 394         for (i = 0; i < 4; i++) {
 395                 if (hapd->conf->ssid.wep.key[i] &&
 396                     hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
 397                                         i == hapd->conf->ssid.wep.idx, NULL, 0,
 398                                         hapd->conf->ssid.wep.key[i],
 399                                         hapd->conf->ssid.wep.len[i])) {
 400                         wpa_printf(MSG_WARNING, "Could not set WEP "
 401                                    "encryption.");
 402                         return -1;
 403                 }
 404                 if (hapd->conf->ssid.wep.key[i] &&
 405                     i == hapd->conf->ssid.wep.idx)
 406                         hostapd_set_privacy(hapd, 1);
 407         }
 408
 409         return 0;
 410 }
 411
 412
 413 static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
 414 {
 415         int ret = 0;
 416         u8 addr[ETH_ALEN];
 417
 418         if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
 419                 return 0;
 420
 421         if (!hapd->iface->driver_ap_teardown) {
 422                 wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
 423                         "Flushing old station entries");
 424
 425                 if (hostapd_flush(hapd)) {
 426                         wpa_msg(hapd->msg_ctx, MSG_WARNING,
 427                                 "Could not connect to kernel driver");
 428                         ret = -1;
 429                 }
 430         }
 431         wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
 432         os_memset(addr, 0xff, ETH_ALEN);
 433         hostapd_drv_sta_deauth(hapd, addr, reason);
 434         hostapd_free_stas(hapd);
 435
 436         return ret;
 437 }
 438
 439
 440 /**
 441  * hostapd_validate_bssid_configuration - Validate BSSID configuration
 442  * @iface: Pointer to interface data
 443  * Returns: 0 on success, -1 on failure
 444  *
 445  * This function is used to validate that the configured BSSIDs are valid.
 446  */
 447 static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
 448 {
 449         u8 mask[ETH_ALEN] = { 0 };
 450         struct hostapd_data *hapd = iface->bss[0];
 451         unsigned int i = iface->conf->num_bss, bits = 0, j;
 452         int auto_addr = 0;
 453
 454         if (hostapd_drv_none(hapd))
 455                 return 0;
 456
 457         /* Generate BSSID mask that is large enough to cover the BSSIDs. */
 458
 459         /* Determine the bits necessary to cover the number of BSSIDs. */
 460         for (i--; i; i >>= 1)
 461                 bits++;
 462
 463         /* Determine the bits necessary to any configured BSSIDs,
 464            if they are higher than the number of BSSIDs. */
 465         for (j = 0; j < iface->conf->num_bss; j++) {
 466                 if (hostapd_mac_comp_empty(iface->conf->bss[j]->bssid) == 0) {
 467                         if (j)
 468                                 auto_addr++;
 469                         continue;
 470                 }
 471
 472                 for (i = 0; i < ETH_ALEN; i++) {
 473                         mask[i] |=
 474                                 iface->conf->bss[j]->bssid[i] ^
 475                                 hapd->own_addr[i];
 476                 }
 477         }
 478
 479         if (!auto_addr)
 480                 goto skip_mask_ext;
 481
 482         for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
 483                 ;
 484         j = 0;
 485         if (i < ETH_ALEN) {
 486                 j = (5 - i) * 8;
 487
 488                 while (mask[i] != 0) {
 489                         mask[i] >>= 1;
 490                         j++;
 491                 }
 492         }
 493
 494         if (bits < j)
 495                 bits = j;
 496
 497         if (bits > 40) {
 498                 wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
 499                            bits);
 500                 return -1;
 501         }
 502
 503         os_memset(mask, 0xff, ETH_ALEN);
 504         j = bits / 8;
 505         for (i = 5; i > 5 - j; i--)
 506                 mask[i] = 0;
 507         j = bits % 8;
 508         while (j--)
 509                 mask[i] <<= 1;
 510
 511 skip_mask_ext:
 512         wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
 513                    (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
 514
 515         if (!auto_addr)
 516                 return 0;
 517
 518         for (i = 0; i < ETH_ALEN; i++) {
 519                 if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
 520                         wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
 521                                    " for start address " MACSTR ".",
 522                                    MAC2STR(mask), MAC2STR(hapd->own_addr));
 523                         wpa_printf(MSG_ERROR, "Start address must be the "
 524                                    "first address in the block (i.e., addr "
 525                                    "AND mask == addr).");
 526                         return -1;
 527                 }
 528         }
 529
 530         return 0;
 531 }
 532
 533
 534 static int mac_in_conf(struct hostapd_config *conf, const void *a)
 535 {
 536         size_t i;
 537
 538         for (i = 0; i < conf->num_bss; i++) {
 539                 if (hostapd_mac_comp(conf->bss[i]->bssid, a) == 0) {
 540                         return 1;
 541                 }
 542         }
 543
 544         return 0;
 545 }
 546
 547
 548 #ifndef CONFIG_NO_RADIUS
 549
 550 static int hostapd_das_nas_mismatch(struct hostapd_data *hapd,
 551                                     struct radius_das_attrs *attr)
 552 {
 553         if (attr->nas_identifier &&
 554             (!hapd->conf->nas_identifier ||
 555              os_strlen(hapd->conf->nas_identifier) !=
 556              attr->nas_identifier_len ||
 557              os_memcmp(hapd->conf->nas_identifier, attr->nas_identifier,
 558                        attr->nas_identifier_len) != 0)) {
 559                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-Identifier mismatch");
 560                 return 1;
 561         }
 562
 563         if (attr->nas_ip_addr &&
 564             (hapd->conf->own_ip_addr.af != AF_INET ||
 565              os_memcmp(&hapd->conf->own_ip_addr.u.v4, attr->nas_ip_addr, 4) !=
 566              0)) {
 567                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IP-Address mismatch");
 568                 return 1;
 569         }
 570
 571 #ifdef CONFIG_IPV6
 572         if (attr->nas_ipv6_addr &&
 573             (hapd->conf->own_ip_addr.af != AF_INET6 ||
 574              os_memcmp(&hapd->conf->own_ip_addr.u.v6, attr->nas_ipv6_addr, 16)
 575              != 0)) {
 576                 wpa_printf(MSG_DEBUG, "RADIUS DAS: NAS-IPv6-Address mismatch");
 577                 return 1;
 578         }
 579 #endif /* CONFIG_IPV6 */
 580
 581         return 0;
 582 }
 583
 584
 585 static struct sta_info * hostapd_das_find_sta(struct hostapd_data *hapd,
 586                                               struct radius_das_attrs *attr)
 587 {
 588         struct sta_info *sta = NULL;
 589         char buf[128];
 590
 591         if (attr->sta_addr)
 592                 sta = ap_get_sta(hapd, attr->sta_addr);
 593
 594         if (sta == NULL && attr->acct_session_id &&
 595             attr->acct_session_id_len == 17) {
 596                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 597                         os_snprintf(buf, sizeof(buf), "%08X-%08X",
 598                                     sta->acct_session_id_hi,
 599                                     sta->acct_session_id_lo);
 600                         if (os_memcmp(attr->acct_session_id, buf, 17) == 0)
 601                                 break;
 602                 }
 603         }
 604
 605         if (sta == NULL && attr->cui) {
 606                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 607                         struct wpabuf *cui;
 608                         cui = ieee802_1x_get_radius_cui(sta->eapol_sm);
 609                         if (cui && wpabuf_len(cui) == attr->cui_len &&
 610                             os_memcmp(wpabuf_head(cui), attr->cui,
 611                                       attr->cui_len) == 0)
 612                                 break;
 613                 }
 614         }
 615
 616         if (sta == NULL && attr->user_name) {
 617                 for (sta = hapd->sta_list; sta; sta = sta->next) {
 618                         u8 *identity;
 619                         size_t identity_len;
 620                         identity = ieee802_1x_get_identity(sta->eapol_sm,
 621                                                            &identity_len);
 622                         if (identity &&
 623                             identity_len == attr->user_name_len &&
 624                             os_memcmp(identity, attr->user_name, identity_len)
 625                             == 0)
 626                                 break;
 627                 }
 628         }
 629
 630         return sta;
 631 }
 632
 633
 634 static enum radius_das_res
 635 hostapd_das_disconnect(void *ctx, struct radius_das_attrs *attr)
 636 {
 637         struct hostapd_data *hapd = ctx;
 638         struct sta_info *sta;
 639
 640         if (hostapd_das_nas_mismatch(hapd, attr))
 641                 return RADIUS_DAS_NAS_MISMATCH;
 642
 643         sta = hostapd_das_find_sta(hapd, attr);
 644         if (sta == NULL)
 645                 return RADIUS_DAS_SESSION_NOT_FOUND;
 646
 647         wpa_auth_pmksa_remove(hapd->wpa_auth, sta->addr);
 648
 649         hostapd_drv_sta_deauth(hapd, sta->addr,
 650                                WLAN_REASON_PREV_AUTH_NOT_VALID);
 651         ap_sta_deauthenticate(hapd, sta, WLAN_REASON_PREV_AUTH_NOT_VALID);
 652
 653         return RADIUS_DAS_SUCCESS;
 654 }
 655
 656 #endif /* CONFIG_NO_RADIUS */
 657
 658
 659 /**
 660  * hostapd_setup_bss - Per-BSS setup (initialization)
 661  * @hapd: Pointer to BSS data
 662  * @first: Whether this BSS is the first BSS of an interface; -1 = not first,
 663  *      but interface may exist
 664  *
 665  * This function is used to initialize all per-BSS data structures and
 666  * resources. This gets called in a loop for each BSS when an interface is
 667  * initialized. Most of the modules that are initialized here will be
 668  * deinitialized in hostapd_cleanup().
 669  */
 670 static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 671 {
 672         struct hostapd_bss_config *conf = hapd->conf;
 673         u8 ssid[HOSTAPD_MAX_SSID_LEN + 1];
 674         int ssid_len, set_ssid;
 675         char force_ifname[IFNAMSIZ];
 676         u8 if_addr[ETH_ALEN];
 677
 678         wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s), first=%d)",
 679                    __func__, hapd, hapd->conf->iface, first);
 680
 681 #ifdef EAP_SERVER_TNC
 682         if (hapd->conf->tnc && tncs_global_init() < 0) {
 683                 wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
 684                 return -1;
 685         }
 686 #endif /* EAP_SERVER_TNC */
 687
 688         if (hapd->started) {
 689                 wpa_printf(MSG_ERROR, "%s: Interface %s was already started",
 690                            __func__, hapd->conf->iface);
 691                 return -1;
 692         }
 693         hapd->started = 1;
 694
 695         if (!first || first == -1) {
 696                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0) {
 697                         /* Allocate the next available BSSID. */
 698                         do {
 699                                 inc_byte_array(hapd->own_addr, ETH_ALEN);
 700                         } while (mac_in_conf(hapd->iconf, hapd->own_addr));
 701                 } else {
 702                         /* Allocate the configured BSSID. */
 703                         os_memcpy(hapd->own_addr, hapd->conf->bssid, ETH_ALEN);
 704
 705                         if (hostapd_mac_comp(hapd->own_addr,
 706                                              hapd->iface->bss[0]->own_addr) ==
 707                             0) {
 708                                 wpa_printf(MSG_ERROR, "BSS '%s' may not have "
 709                                            "BSSID set to the MAC address of "
 710                                            "the radio", hapd->conf->iface);
 711                                 return -1;
 712                         }
 713                 }
 714
 715                 hapd->interface_added = 1;
 716                 if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 717                                    hapd->conf->iface, hapd->own_addr, hapd,
 718                                    &hapd->drv_priv, force_ifname, if_addr,
 719                                    hapd->conf->bridge[0] ? hapd->conf->bridge :
 720                                    NULL, first == -1)) {
 721                         wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
 722                                    MACSTR ")", MAC2STR(hapd->own_addr));
 723                         hapd->interface_added = 0;
 724                         return -1;
 725                 }
 726         }
 727
 728         if (conf->wmm_enabled < 0)
 729                 conf->wmm_enabled = hapd->iconf->ieee80211n;
 730
 731         hostapd_flush_old_stations(hapd, WLAN_REASON_PREV_AUTH_NOT_VALID);
 732         hostapd_set_privacy(hapd, 0);
 733
 734         hostapd_broadcast_wep_clear(hapd);
 735         if (hostapd_setup_encryption(hapd->conf->iface, hapd))
 736                 return -1;
 737
 738         /*
 739          * Fetch the SSID from the system and use it or,
 740          * if one was specified in the config file, verify they
 741          * match.
 742          */
 743         ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
 744         if (ssid_len < 0) {
 745                 wpa_printf(MSG_ERROR, "Could not read SSID from system");
 746                 return -1;
 747         }
 748         if (conf->ssid.ssid_set) {
 749                 /*
 750                  * If SSID is specified in the config file and it differs
 751                  * from what is being used then force installation of the
 752                  * new SSID.
 753                  */
 754                 set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
 755                             os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
 756         } else {
 757                 /*
 758                  * No SSID in the config file; just use the one we got
 759                  * from the system.
 760                  */
 761                 set_ssid = 0;
 762                 conf->ssid.ssid_len = ssid_len;
 763                 os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
 764         }
 765
 766         if (!hostapd_drv_none(hapd)) {
 767                 wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
 768                            " and ssid \"%s\"",
 769                            hapd->conf->iface, MAC2STR(hapd->own_addr),
 770                            wpa_ssid_txt(hapd->conf->ssid.ssid,
 771                                         hapd->conf->ssid.ssid_len));
 772         }
 773
 774         if (hostapd_setup_wpa_psk(conf)) {
 775                 wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
 776                 return -1;
 777         }
 778
 779         /* Set SSID for the kernel driver (to be used in beacon and probe
 780          * response frames) */
 781         if (set_ssid && hostapd_set_ssid(hapd, conf->ssid.ssid,
 782                                          conf->ssid.ssid_len)) {
 783                 wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
 784                 return -1;
 785         }
 786
 787         if (wpa_debug_level <= MSG_MSGDUMP)
 788                 conf->radius->msg_dumps = 1;
 789 #ifndef CONFIG_NO_RADIUS
 790         hapd->radius = radius_client_init(hapd, conf->radius);
 791         if (hapd->radius == NULL) {
 792                 wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
 793                 return -1;
 794         }
 795
 796         if (hapd->conf->radius_das_port) {
 797                 struct radius_das_conf das_conf;
 798                 os_memset(&das_conf, 0, sizeof(das_conf));
 799                 das_conf.port = hapd->conf->radius_das_port;
 800                 das_conf.shared_secret = hapd->conf->radius_das_shared_secret;
 801                 das_conf.shared_secret_len =
 802                         hapd->conf->radius_das_shared_secret_len;
 803                 das_conf.client_addr = &hapd->conf->radius_das_client_addr;
 804                 das_conf.time_window = hapd->conf->radius_das_time_window;
 805                 das_conf.require_event_timestamp =
 806                         hapd->conf->radius_das_require_event_timestamp;
 807                 das_conf.ctx = hapd;
 808                 das_conf.disconnect = hostapd_das_disconnect;
 809                 hapd->radius_das = radius_das_init(&das_conf);
 810                 if (hapd->radius_das == NULL) {
 811                         wpa_printf(MSG_ERROR, "RADIUS DAS initialization "
 812                                    "failed.");
 813                         return -1;
 814                 }
 815         }
 816 #endif /* CONFIG_NO_RADIUS */
 817
 818         if (hostapd_acl_init(hapd)) {
 819                 wpa_printf(MSG_ERROR, "ACL initialization failed.");
 820                 return -1;
 821         }
 822         if (hostapd_init_wps(hapd, conf))
 823                 return -1;
 824
 825         if (authsrv_init(hapd) < 0)
 826                 return -1;
 827
 828         if (ieee802_1x_init(hapd)) {
 829                 wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
 830                 return -1;
 831         }
 832
 833         if ((hapd->conf->wpa || hapd->conf->osen) && hostapd_setup_wpa(hapd))
 834                 return -1;
 835
 836         if (accounting_init(hapd)) {
 837                 wpa_printf(MSG_ERROR, "Accounting initialization failed.");
 838                 return -1;
 839         }
 840
 841         if (hapd->conf->ieee802_11f &&
 842             (hapd->iapp = iapp_init(hapd, hapd->conf->iapp_iface)) == NULL) {
 843                 wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
 844                            "failed.");
 845                 return -1;
 846         }
 847
 848 #ifdef CONFIG_INTERWORKING
 849         if (gas_serv_init(hapd)) {
 850                 wpa_printf(MSG_ERROR, "GAS server initialization failed");
 851                 return -1;
 852         }
 853
 854         if (conf->qos_map_set_len &&
 855             hostapd_drv_set_qos_map(hapd, conf->qos_map_set,
 856                                     conf->qos_map_set_len)) {
 857                 wpa_printf(MSG_ERROR, "Failed to initialize QoS Map");
 858                 return -1;
 859         }
 860 #endif /* CONFIG_INTERWORKING */
 861
 862         if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
 863                 wpa_printf(MSG_ERROR, "VLAN initialization failed.");
 864                 return -1;
 865         }
 866
 867         if (!hapd->conf->start_disabled && ieee802_11_set_beacon(hapd) < 0)
 868                 return -1;
 869
 870         if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
 871                 return -1;
 872
 873         if (hapd->driver && hapd->driver->set_operstate)
 874                 hapd->driver->set_operstate(hapd->drv_priv, 1);
 875
 876         return 0;
 877 }
 878
 879
 880 static void hostapd_tx_queue_params(struct hostapd_iface *iface)
 881 {
 882         struct hostapd_data *hapd = iface->bss[0];
 883         int i;
 884         struct hostapd_tx_queue_params *p;
 885
 886         for (i = 0; i < NUM_TX_QUEUES; i++) {
 887                 p = &iface->conf->tx_queue[i];
 888
 889                 if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
 890                                                 p->cwmax, p->burst)) {
 891                         wpa_printf(MSG_DEBUG, "Failed to set TX queue "
 892                                    "parameters for queue %d.", i);
 893                         /* Continue anyway */
 894                 }
 895         }
 896 }
 897
 898
 899 static int hostapd_set_acl_list(struct hostapd_data *hapd,
 900                                 struct mac_acl_entry *mac_acl,
 901                                 int n_entries, u8 accept_acl)
 902 {
 903         struct hostapd_acl_params *acl_params;
 904         int i, err;
 905
 906         acl_params = os_zalloc(sizeof(*acl_params) +
 907                                (n_entries * sizeof(acl_params->mac_acl[0])));
 908         if (!acl_params)
 909                 return -ENOMEM;
 910
 911         for (i = 0; i < n_entries; i++)
 912                 os_memcpy(acl_params->mac_acl[i].addr, mac_acl[i].addr,
 913                           ETH_ALEN);
 914
 915         acl_params->acl_policy = accept_acl;
 916         acl_params->num_mac_acl = n_entries;
 917
 918         err = hostapd_drv_set_acl(hapd, acl_params);
 919
 920         os_free(acl_params);
 921
 922         return err;
 923 }
 924
 925
 926 static void hostapd_set_acl(struct hostapd_data *hapd)
 927 {
 928         struct hostapd_config *conf = hapd->iconf;
 929         int err;
 930         u8 accept_acl;
 931
 932         if (hapd->iface->drv_max_acl_mac_addrs == 0)
 933                 return;
 934         if (!(conf->bss[0]->num_accept_mac || conf->bss[0]->num_deny_mac))
 935                 return;
 936
 937         if (conf->bss[0]->macaddr_acl == DENY_UNLESS_ACCEPTED) {
 938                 if (conf->bss[0]->num_accept_mac) {
 939                         accept_acl = 1;
 940                         err = hostapd_set_acl_list(hapd,
 941                                                    conf->bss[0]->accept_mac,
 942                                                    conf->bss[0]->num_accept_mac,
 943                                                    accept_acl);
 944                         if (err) {
 945                                 wpa_printf(MSG_DEBUG, "Failed to set accept acl");
 946                                 return;
 947                         }
 948                 } else {
 949                         wpa_printf(MSG_DEBUG, "Mismatch between ACL Policy & Accept/deny lists file");
 950                 }
 951         } else if (conf->bss[0]->macaddr_acl == ACCEPT_UNLESS_DENIED) {
 952                 if (conf->bss[0]->num_deny_mac) {
 953                         accept_acl = 0;
 954                         err = hostapd_set_acl_list(hapd, conf->bss[0]->deny_mac,
 955                                                    conf->bss[0]->num_deny_mac,
 956                                                    accept_acl);
 957                         if (err) {
 958                                 wpa_printf(MSG_DEBUG, "Failed to set deny acl");
 959                                 return;
 960                         }
 961                 } else {
 962                         wpa_printf(MSG_DEBUG, "Mismatch between ACL Policy & Accept/deny lists file");
 963                 }
 964         }
 965 }
 966
 967
 968 static int start_ctrl_iface_bss(struct hostapd_data *hapd)
 969 {
 970         if (!hapd->iface->interfaces ||
 971             !hapd->iface->interfaces->ctrl_iface_init)
 972                 return 0;
 973
 974         if (hapd->iface->interfaces->ctrl_iface_init(hapd)) {
 975                 wpa_printf(MSG_ERROR,
 976                            "Failed to setup control interface for %s",
 977                            hapd->conf->iface);
 978                 return -1;
 979         }
 980
 981         return 0;
 982 }
 983
 984
 985 static int start_ctrl_iface(struct hostapd_iface *iface)
 986 {
 987         size_t i;
 988
 989         if (!iface->interfaces || !iface->interfaces->ctrl_iface_init)
 990                 return 0;
 991
 992         for (i = 0; i < iface->num_bss; i++) {
 993                 struct hostapd_data *hapd = iface->bss[i];
 994                 if (iface->interfaces->ctrl_iface_init(hapd)) {
 995                         wpa_printf(MSG_ERROR,
 996                                    "Failed to setup control interface for %s",
 997                                    hapd->conf->iface);
 998                         return -1;
 999                 }
1000         }
1001
1002         return 0;
1003 }
1004
1005
1006 static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx)
1007 {
1008         struct hostapd_iface *iface = eloop_ctx;
1009
1010         if (!iface->wait_channel_update) {
1011                 wpa_printf(MSG_INFO, "Channel list update timeout, but interface was not waiting for it");
1012                 return;
1013         }
1014
1015         /*
1016          * It is possible that the existing channel list is acceptable, so try
1017          * to proceed.
1018          */
1019         wpa_printf(MSG_DEBUG, "Channel list update timeout - try to continue anyway");
1020         setup_interface2(iface);
1021 }
1022
1023
1024 void hostapd_channel_list_updated(struct hostapd_iface *iface, int initiator)
1025 {
1026         if (!iface->wait_channel_update || initiator != REGDOM_SET_BY_USER)
1027                 return;
1028
1029         wpa_printf(MSG_DEBUG, "Channel list updated - continue setup");
1030         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1031         setup_interface2(iface);
1032 }
1033
1034
1035 static int setup_interface(struct hostapd_iface *iface)
1036 {
1037         struct hostapd_data *hapd = iface->bss[0];
1038         size_t i;
1039
1040         /*
1041          * It is possible that setup_interface() is called after the interface
1042          * was disabled etc., in which case driver_ap_teardown is possibly set
1043          * to 1. Clear it here so any other key/station deletion, which is not
1044          * part of a teardown flow, would also call the relevant driver
1045          * callbacks.
1046          */
1047         iface->driver_ap_teardown = 0;
1048
1049         if (!iface->phy[0]) {
1050                 const char *phy = hostapd_drv_get_radio_name(hapd);
1051                 if (phy) {
1052                         wpa_printf(MSG_DEBUG, "phy: %s", phy);
1053                         os_strlcpy(iface->phy, phy, sizeof(iface->phy));
1054                 }
1055         }
1056
1057         /*
1058          * Make sure that all BSSes get configured with a pointer to the same
1059          * driver interface.
1060          */
1061         for (i = 1; i < iface->num_bss; i++) {
1062                 iface->bss[i]->driver = hapd->driver;
1063                 iface->bss[i]->drv_priv = hapd->drv_priv;
1064         }
1065
1066         if (hostapd_validate_bssid_configuration(iface))
1067                 return -1;
1068
1069         /*
1070          * Initialize control interfaces early to allow external monitoring of
1071          * channel setup operations that may take considerable amount of time
1072          * especially for DFS cases.
1073          */
1074         if (start_ctrl_iface(iface))
1075                 return -1;
1076
1077         if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
1078                 char country[4], previous_country[4];
1079
1080                 hostapd_set_state(iface, HAPD_IFACE_COUNTRY_UPDATE);
1081                 if (hostapd_get_country(hapd, previous_country) < 0)
1082                         previous_country[0] = '\0';
1083
1084                 os_memcpy(country, hapd->iconf->country, 3);
1085                 country[3] = '\0';
1086                 if (hostapd_set_country(hapd, country) < 0) {
1087                         wpa_printf(MSG_ERROR, "Failed to set country code");
1088                         return -1;
1089                 }
1090
1091                 wpa_printf(MSG_DEBUG, "Previous country code %s, new country code %s",
1092                            previous_country, country);
1093
1094                 if (os_strncmp(previous_country, country, 2) != 0) {
1095                         wpa_printf(MSG_DEBUG, "Continue interface setup after channel list update");
1096                         iface->wait_channel_update = 1;
1097                         eloop_register_timeout(5, 0,
1098                                                channel_list_update_timeout,
1099                                                iface, NULL);
1100                         return 0;
1101                 }
1102         }
1103
1104         return setup_interface2(iface);
1105 }
1106
1107
1108 static int setup_interface2(struct hostapd_iface *iface)
1109 {
1110         iface->wait_channel_update = 0;
1111
1112         if (hostapd_get_hw_features(iface)) {
1113                 /* Not all drivers support this yet, so continue without hw
1114                  * feature data. */
1115         } else {
1116                 int ret = hostapd_select_hw_mode(iface);
1117                 if (ret < 0) {
1118                         wpa_printf(MSG_ERROR, "Could not select hw_mode and "
1119                                    "channel. (%d)", ret);
1120                         goto fail;
1121                 }
1122                 if (ret == 1) {
1123                         wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback (ACS)");
1124                         return 0;
1125                 }
1126                 ret = hostapd_check_ht_capab(iface);
1127                 if (ret < 0)
1128                         goto fail;
1129                 if (ret == 1) {
1130                         wpa_printf(MSG_DEBUG, "Interface initialization will "
1131                                    "be completed in a callback");
1132                         return 0;
1133                 }
1134
1135                 if (iface->conf->ieee80211h)
1136                         wpa_printf(MSG_DEBUG, "DFS support is enabled");
1137         }
1138         return hostapd_setup_interface_complete(iface, 0);
1139
1140 fail:
1141         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1142         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1143         if (iface->interfaces && iface->interfaces->terminate_on_error)
1144                 eloop_terminate();
1145         return -1;
1146 }
1147
1148
1149 /**
1150  * hostapd_setup_interface_complete - Complete interface setup
1151  *
1152  * This function is called when previous steps in the interface setup has been
1153  * completed. This can also start operations, e.g., DFS, that will require
1154  * additional processing before interface is ready to be enabled. Such
1155  * operations will call this function from eloop callbacks when finished.
1156  */
1157 int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
1158 {
1159         struct hostapd_data *hapd = iface->bss[0];
1160         size_t j;
1161         u8 *prev_addr;
1162
1163         if (err)
1164                 goto fail;
1165
1166         wpa_printf(MSG_DEBUG, "Completing interface initialization");
1167         if (iface->conf->channel) {
1168 #ifdef NEED_AP_MLME
1169                 int res;
1170 #endif /* NEED_AP_MLME */
1171
1172                 iface->freq = hostapd_hw_get_freq(hapd, iface->conf->channel);
1173                 wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
1174                            "Frequency: %d MHz",
1175                            hostapd_hw_mode_txt(iface->conf->hw_mode),
1176                            iface->conf->channel, iface->freq);
1177
1178 #ifdef NEED_AP_MLME
1179                 /* Check DFS */
1180                 res = hostapd_handle_dfs(iface);
1181                 if (res <= 0) {
1182                         if (res < 0)
1183                                 goto fail;
1184                         return res;
1185                 }
1186 #endif /* NEED_AP_MLME */
1187
1188                 if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
1189                                      hapd->iconf->channel,
1190                                      hapd->iconf->ieee80211n,
1191                                      hapd->iconf->ieee80211ac,
1192                                      hapd->iconf->secondary_channel,
1193                                      hapd->iconf->vht_oper_chwidth,
1194                                      hapd->iconf->vht_oper_centr_freq_seg0_idx,
1195                                      hapd->iconf->vht_oper_centr_freq_seg1_idx)) {
1196                         wpa_printf(MSG_ERROR, "Could not set channel for "
1197                                    "kernel driver");
1198                         goto fail;
1199                 }
1200         }
1201
1202         if (iface->current_mode) {
1203                 if (hostapd_prepare_rates(iface, iface->current_mode)) {
1204                         wpa_printf(MSG_ERROR, "Failed to prepare rates "
1205                                    "table.");
1206                         hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
1207                                        HOSTAPD_LEVEL_WARNING,
1208                                        "Failed to prepare rates table.");
1209                         goto fail;
1210                 }
1211         }
1212
1213         if (hapd->iconf->rts_threshold > -1 &&
1214             hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
1215                 wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
1216                            "kernel driver");
1217                 goto fail;
1218         }
1219
1220         if (hapd->iconf->fragm_threshold > -1 &&
1221             hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
1222                 wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
1223                            "for kernel driver");
1224                 goto fail;
1225         }
1226
1227         prev_addr = hapd->own_addr;
1228
1229         for (j = 0; j < iface->num_bss; j++) {
1230                 hapd = iface->bss[j];
1231                 if (j)
1232                         os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
1233                 if (hostapd_setup_bss(hapd, j == 0))
1234                         goto fail;
1235                 if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
1236                         prev_addr = hapd->own_addr;
1237         }
1238         hapd = iface->bss[0];
1239
1240         hostapd_tx_queue_params(iface);
1241
1242         ap_list_init(iface);
1243
1244         hostapd_set_acl(hapd);
1245
1246         if (hostapd_driver_commit(hapd) < 0) {
1247                 wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
1248                            "configuration", __func__);
1249                 goto fail;
1250         }
1251
1252         /*
1253          * WPS UPnP module can be initialized only when the "upnp_iface" is up.
1254          * If "interface" and "upnp_iface" are the same (e.g., non-bridge
1255          * mode), the interface is up only after driver_commit, so initialize
1256          * WPS after driver_commit.
1257          */
1258         for (j = 0; j < iface->num_bss; j++) {
1259                 if (hostapd_init_wps_complete(iface->bss[j]))
1260                         goto fail;
1261         }
1262
1263         hostapd_set_state(iface, HAPD_IFACE_ENABLED);
1264         wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_ENABLED);
1265         if (hapd->setup_complete_cb)
1266                 hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
1267
1268         wpa_printf(MSG_DEBUG, "%s: Setup of interface done.",
1269                    iface->bss[0]->conf->iface);
1270         if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
1271                 iface->interfaces->terminate_on_error--;
1272
1273         return 0;
1274
1275 fail:
1276         wpa_printf(MSG_ERROR, "Interface initialization failed");
1277         hostapd_set_state(iface, HAPD_IFACE_DISABLED);
1278         wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1279         if (iface->interfaces && iface->interfaces->terminate_on_error)
1280                 eloop_terminate();
1281         return -1;
1282 }
1283
1284
1285 /**
1286  * hostapd_setup_interface - Setup of an interface
1287  * @iface: Pointer to interface data.
1288  * Returns: 0 on success, -1 on failure
1289  *
1290  * Initializes the driver interface, validates the configuration,
1291  * and sets driver parameters based on the configuration.
1292  * Flushes old stations, sets the channel, encryption,
1293  * beacons, and WDS links based on the configuration.
1294  *
1295  * If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
1296  * or DFS operations, this function returns 0 before such operations have been
1297  * completed. The pending operations are registered into eloop and will be
1298  * completed from eloop callbacks. Those callbacks end up calling
1299  * hostapd_setup_interface_complete() once setup has been completed.
1300  */
1301 int hostapd_setup_interface(struct hostapd_iface *iface)
1302 {
1303         int ret;
1304
1305         ret = setup_interface(iface);
1306         if (ret) {
1307                 wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
1308                            iface->bss[0]->conf->iface);
1309                 return -1;
1310         }
1311
1312         return 0;
1313 }
1314
1315
1316 /**
1317  * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
1318  * @hapd_iface: Pointer to interface data
1319  * @conf: Pointer to per-interface configuration
1320  * @bss: Pointer to per-BSS configuration for this BSS
1321  * Returns: Pointer to allocated BSS data
1322  *
1323  * This function is used to allocate per-BSS data structure. This data will be
1324  * freed after hostapd_cleanup() is called for it during interface
1325  * deinitialization.
1326  */
1327 struct hostapd_data *
1328 hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
1329                        struct hostapd_config *conf,
1330                        struct hostapd_bss_config *bss)
1331 {
1332         struct hostapd_data *hapd;
1333
1334         hapd = os_zalloc(sizeof(*hapd));
1335         if (hapd == NULL)
1336                 return NULL;
1337
1338         hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
1339         hapd->iconf = conf;
1340         hapd->conf = bss;
1341         hapd->iface = hapd_iface;
1342         hapd->driver = hapd->iconf->driver;
1343         hapd->ctrl_sock = -1;
1344
1345         return hapd;
1346 }
1347
1348
1349 static void hostapd_bss_deinit(struct hostapd_data *hapd)
1350 {
1351         wpa_printf(MSG_DEBUG, "%s: deinit bss %s", __func__,
1352                    hapd->conf->iface);
1353         hostapd_free_stas(hapd);
1354         hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
1355         hostapd_clear_wep(hapd);
1356         hostapd_cleanup(hapd);
1357 }
1358
1359
1360 void hostapd_interface_deinit(struct hostapd_iface *iface)
1361 {
1362         int j;
1363
1364         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1365         if (iface == NULL)
1366                 return;
1367
1368 #ifdef CONFIG_IEEE80211N
1369 #ifdef NEED_AP_MLME
1370         hostapd_stop_setup_timers(iface);
1371         eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
1372 #endif /* NEED_AP_MLME */
1373 #endif /* CONFIG_IEEE80211N */
1374         eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
1375         iface->wait_channel_update = 0;
1376
1377         for (j = iface->num_bss - 1; j >= 0; j--)
1378                 hostapd_bss_deinit(iface->bss[j]);
1379 }
1380
1381
1382 void hostapd_interface_free(struct hostapd_iface *iface)
1383 {
1384         size_t j;
1385         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1386         for (j = 0; j < iface->num_bss; j++) {
1387                 wpa_printf(MSG_DEBUG, "%s: free hapd %p",
1388                            __func__, iface->bss[j]);
1389                 os_free(iface->bss[j]);
1390         }
1391         hostapd_cleanup_iface(iface);
1392 }
1393
1394
1395 /**
1396  * hostapd_init - Allocate and initialize per-interface data
1397  * @config_file: Path to the configuration file
1398  * Returns: Pointer to the allocated interface data or %NULL on failure
1399  *
1400  * This function is used to allocate main data structures for per-interface
1401  * data. The allocated data buffer will be freed by calling
1402  * hostapd_cleanup_iface().
1403  */
1404 struct hostapd_iface * hostapd_init(struct hapd_interfaces *interfaces,
1405                                     const char *config_file)
1406 {
1407         struct hostapd_iface *hapd_iface = NULL;
1408         struct hostapd_config *conf = NULL;
1409         struct hostapd_data *hapd;
1410         size_t i;
1411
1412         hapd_iface = os_zalloc(sizeof(*hapd_iface));
1413         if (hapd_iface == NULL)
1414                 goto fail;
1415
1416         hapd_iface->config_fname = os_strdup(config_file);
1417         if (hapd_iface->config_fname == NULL)
1418                 goto fail;
1419
1420         conf = interfaces->config_read_cb(hapd_iface->config_fname);
1421         if (conf == NULL)
1422                 goto fail;
1423         hapd_iface->conf = conf;
1424
1425         hapd_iface->num_bss = conf->num_bss;
1426         hapd_iface->bss = os_calloc(conf->num_bss,
1427                                     sizeof(struct hostapd_data *));
1428         if (hapd_iface->bss == NULL)
1429                 goto fail;
1430
1431         for (i = 0; i < conf->num_bss; i++) {
1432                 hapd = hapd_iface->bss[i] =
1433                         hostapd_alloc_bss_data(hapd_iface, conf,
1434                                                conf->bss[i]);
1435                 if (hapd == NULL)
1436                         goto fail;
1437                 hapd->msg_ctx = hapd;
1438         }
1439
1440         return hapd_iface;
1441
1442 fail:
1443         wpa_printf(MSG_ERROR, "Failed to set up interface with %s",
1444                    config_file);
1445         if (conf)
1446                 hostapd_config_free(conf);
1447         if (hapd_iface) {
1448                 os_free(hapd_iface->config_fname);
1449                 os_free(hapd_iface->bss);
1450                 wpa_printf(MSG_DEBUG, "%s: free iface %p",
1451                            __func__, hapd_iface);
1452                 os_free(hapd_iface);
1453         }
1454         return NULL;
1455 }
1456
1457
1458 static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
1459 {
1460         size_t i, j;
1461
1462         for (i = 0; i < interfaces->count; i++) {
1463                 struct hostapd_iface *iface = interfaces->iface[i];
1464                 for (j = 0; j < iface->num_bss; j++) {
1465                         struct hostapd_data *hapd = iface->bss[j];
1466                         if (os_strcmp(ifname, hapd->conf->iface) == 0)
1467                                 return 1;
1468                 }
1469         }
1470
1471         return 0;
1472 }
1473
1474
1475 /**
1476  * hostapd_interface_init_bss - Read configuration file and init BSS data
1477  *
1478  * This function is used to parse configuration file for a BSS. This BSS is
1479  * added to an existing interface sharing the same radio (if any) or a new
1480  * interface is created if this is the first interface on a radio. This
1481  * allocate memory for the BSS. No actual driver operations are started.
1482  *
1483  * This is similar to hostapd_interface_init(), but for a case where the
1484  * configuration is used to add a single BSS instead of all BSSes for a radio.
1485  */
1486 struct hostapd_iface *
1487 hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
1488                            const char *config_fname, int debug)
1489 {
1490         struct hostapd_iface *new_iface = NULL, *iface = NULL;
1491         struct hostapd_data *hapd;
1492         int k;
1493         size_t i, bss_idx;
1494
1495         if (!phy || !*phy)
1496                 return NULL;
1497
1498         for (i = 0; i < interfaces->count; i++) {
1499                 if (os_strcmp(interfaces->iface[i]->phy, phy) == 0) {
1500                         iface = interfaces->iface[i];
1501                         break;
1502                 }
1503         }
1504
1505         wpa_printf(MSG_INFO, "Configuration file: %s (phy %s)%s",
1506                    config_fname, phy, iface ? "" : " --> new PHY");
1507         if (iface) {
1508                 struct hostapd_config *conf;
1509                 struct hostapd_bss_config **tmp_conf;
1510                 struct hostapd_data **tmp_bss;
1511                 struct hostapd_bss_config *bss;
1512                 const char *ifname;
1513
1514                 /* Add new BSS to existing iface */
1515                 conf = interfaces->config_read_cb(config_fname);
1516                 if (conf == NULL)
1517                         return NULL;
1518                 if (conf->num_bss > 1) {
1519                         wpa_printf(MSG_ERROR, "Multiple BSSes specified in BSS-config");
1520                         hostapd_config_free(conf);
1521                         return NULL;
1522                 }
1523
1524                 ifname = conf->bss[0]->iface;
1525                 if (ifname[0] != '\0' && ifname_in_use(interfaces, ifname)) {
1526                         wpa_printf(MSG_ERROR,
1527                                    "Interface name %s already in use", ifname);
1528                         hostapd_config_free(conf);
1529                         return NULL;
1530                 }
1531
1532                 tmp_conf = os_realloc_array(
1533                         iface->conf->bss, iface->conf->num_bss + 1,
1534                         sizeof(struct hostapd_bss_config *));
1535                 tmp_bss = os_realloc_array(iface->bss, iface->num_bss + 1,
1536                                            sizeof(struct hostapd_data *));
1537                 if (tmp_bss)
1538                         iface->bss = tmp_bss;
1539                 if (tmp_conf) {
1540                         iface->conf->bss = tmp_conf;
1541                         iface->conf->last_bss = tmp_conf[0];
1542                 }
1543                 if (tmp_bss == NULL || tmp_conf == NULL) {
1544                         hostapd_config_free(conf);
1545                         return NULL;
1546                 }
1547                 bss = iface->conf->bss[iface->conf->num_bss] = conf->bss[0];
1548                 iface->conf->num_bss++;
1549
1550                 hapd = hostapd_alloc_bss_data(iface, iface->conf, bss);
1551                 if (hapd == NULL) {
1552                         iface->conf->num_bss--;
1553                         hostapd_config_free(conf);
1554                         return NULL;
1555                 }
1556                 iface->conf->last_bss = bss;
1557                 iface->bss[iface->num_bss] = hapd;
1558                 hapd->msg_ctx = hapd;
1559
1560                 bss_idx = iface->num_bss++;
1561                 conf->num_bss--;
1562                 conf->bss[0] = NULL;
1563                 hostapd_config_free(conf);
1564         } else {
1565                 /* Add a new iface with the first BSS */
1566                 new_iface = iface = hostapd_init(interfaces, config_fname);
1567                 if (!iface)
1568                         return NULL;
1569                 os_strlcpy(iface->phy, phy, sizeof(iface->phy));
1570                 iface->interfaces = interfaces;
1571                 bss_idx = 0;
1572         }
1573
1574         for (k = 0; k < debug; k++) {
1575                 if (iface->bss[bss_idx]->conf->logger_stdout_level > 0)
1576                         iface->bss[bss_idx]->conf->logger_stdout_level--;
1577         }
1578
1579         if (iface->conf->bss[bss_idx]->iface[0] == '\0' &&
1580             !hostapd_drv_none(iface->bss[bss_idx])) {
1581                 wpa_printf(MSG_ERROR, "Interface name not specified in %s",
1582                            config_fname);
1583                 if (new_iface)
1584                         hostapd_interface_deinit_free(new_iface);
1585                 return NULL;
1586         }
1587
1588         return iface;
1589 }
1590
1591
1592 void hostapd_interface_deinit_free(struct hostapd_iface *iface)
1593 {
1594         const struct wpa_driver_ops *driver;
1595         void *drv_priv;
1596
1597         wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
1598         if (iface == NULL)
1599                 return;
1600         wpa_printf(MSG_DEBUG, "%s: num_bss=%u conf->num_bss=%u",
1601                    __func__, (unsigned int) iface->num_bss,
1602                    (unsigned int) iface->conf->num_bss);
1603         driver = iface->bss[0]->driver;
1604         drv_priv = iface->bss[0]->drv_priv;
1605         hostapd_interface_deinit(iface);
1606         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
1607                    __func__, driver, drv_priv);
1608         if (driver && driver->hapd_deinit && drv_priv)
1609                 driver->hapd_deinit(drv_priv);
1610         hostapd_interface_free(iface);
1611 }
1612
1613
1614 static void hostapd_deinit_driver(const struct wpa_driver_ops *driver,
1615                                   void *drv_priv,
1616                                   struct hostapd_iface *hapd_iface)
1617 {
1618         size_t j;
1619
1620         wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
1621                    __func__, driver, drv_priv);
1622         if (driver && driver->hapd_deinit && drv_priv) {
1623                 driver->hapd_deinit(drv_priv);
1624                 for (j = 0; j < hapd_iface->num_bss; j++) {
1625                         wpa_printf(MSG_DEBUG, "%s:bss[%d]->drv_priv=%p",
1626                                    __func__, (int) j,
1627                                    hapd_iface->bss[j]->drv_priv);
1628                         if (hapd_iface->bss[j]->drv_priv == drv_priv)
1629                                 hapd_iface->bss[j]->drv_priv = NULL;
1630                 }
1631         }
1632 }
1633
1634
1635 int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
1636 {
1637         size_t j;
1638
1639         if (hapd_iface->bss[0]->drv_priv != NULL) {
1640                 wpa_printf(MSG_ERROR, "Interface %s already enabled",
1641                            hapd_iface->conf->bss[0]->iface);
1642                 return -1;
1643         }
1644
1645         wpa_printf(MSG_DEBUG, "Enable interface %s",
1646                    hapd_iface->conf->bss[0]->iface);
1647
1648         for (j = 0; j < hapd_iface->num_bss; j++)
1649                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
1650         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
1651                 wpa_printf(MSG_INFO, "Invalid configuration - cannot enable");
1652                 return -1;
1653         }
1654
1655         if (hapd_iface->interfaces == NULL ||
1656             hapd_iface->interfaces->driver_init == NULL ||
1657             hapd_iface->interfaces->driver_init(hapd_iface))
1658                 return -1;
1659
1660         if (hostapd_setup_interface(hapd_iface)) {
1661                 hostapd_deinit_driver(hapd_iface->bss[0]->driver,
1662                                       hapd_iface->bss[0]->drv_priv,
1663                                       hapd_iface);
1664                 return -1;
1665         }
1666
1667         return 0;
1668 }
1669
1670
1671 int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
1672 {
1673         size_t j;
1674
1675         wpa_printf(MSG_DEBUG, "Reload interface %s",
1676                    hapd_iface->conf->bss[0]->iface);
1677         for (j = 0; j < hapd_iface->num_bss; j++)
1678                 hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
1679         if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
1680                 wpa_printf(MSG_ERROR, "Updated configuration is invalid");
1681                 return -1;
1682         }
1683         hostapd_clear_old(hapd_iface);
1684         for (j = 0; j < hapd_iface->num_bss; j++)
1685                 hostapd_reload_bss(hapd_iface->bss[j]);
1686
1687         return 0;
1688 }
1689
1690
1691 int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
1692 {
1693         size_t j;
1694         const struct wpa_driver_ops *driver;
1695         void *drv_priv;
1696
1697         if (hapd_iface == NULL)
1698                 return -1;
1699
1700         if (hapd_iface->bss[0]->drv_priv == NULL) {
1701                 wpa_printf(MSG_INFO, "Interface %s already disabled",
1702                            hapd_iface->conf->bss[0]->iface);
1703                 return -1;
1704         }
1705
1706         wpa_msg(hapd_iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
1707         driver = hapd_iface->bss[0]->driver;
1708         drv_priv = hapd_iface->bss[0]->drv_priv;
1709
1710         hapd_iface->driver_ap_teardown =
1711                 !!(hapd_iface->drv_flags &
1712                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
1713
1714         /* same as hostapd_interface_deinit without deinitializing ctrl-iface */
1715         for (j = 0; j < hapd_iface->num_bss; j++) {
1716                 struct hostapd_data *hapd = hapd_iface->bss[j];
1717                 hostapd_free_stas(hapd);
1718                 hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
1719                 hostapd_clear_wep(hapd);
1720                 hostapd_free_hapd_data(hapd);
1721         }
1722
1723         hostapd_deinit_driver(driver, drv_priv, hapd_iface);
1724
1725         /* From hostapd_cleanup_iface: These were initialized in
1726          * hostapd_setup_interface and hostapd_setup_interface_complete
1727          */
1728         hostapd_cleanup_iface_partial(hapd_iface);
1729
1730         wpa_printf(MSG_DEBUG, "Interface %s disabled",
1731                    hapd_iface->bss[0]->conf->iface);
1732         hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
1733         return 0;
1734 }
1735
1736
1737 static struct hostapd_iface *
1738 hostapd_iface_alloc(struct hapd_interfaces *interfaces)
1739 {
1740         struct hostapd_iface **iface, *hapd_iface;
1741
1742         iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
1743                                  sizeof(struct hostapd_iface *));
1744         if (iface == NULL)
1745                 return NULL;
1746         interfaces->iface = iface;
1747         hapd_iface = interfaces->iface[interfaces->count] =
1748                 os_zalloc(sizeof(*hapd_iface));
1749         if (hapd_iface == NULL) {
1750                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
1751                            "the interface", __func__);
1752                 return NULL;
1753         }
1754         interfaces->count++;
1755         hapd_iface->interfaces = interfaces;
1756
1757         return hapd_iface;
1758 }
1759
1760
1761 static struct hostapd_config *
1762 hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
1763                      const char *ctrl_iface)
1764 {
1765         struct hostapd_bss_config *bss;
1766         struct hostapd_config *conf;
1767
1768         /* Allocates memory for bss and conf */
1769         conf = hostapd_config_defaults();
1770         if (conf == NULL) {
1771                  wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
1772                                 "configuration", __func__);
1773                 return NULL;
1774         }
1775
1776         conf->driver = wpa_drivers[0];
1777         if (conf->driver == NULL) {
1778                 wpa_printf(MSG_ERROR, "No driver wrappers registered!");
1779                 hostapd_config_free(conf);
1780                 return NULL;
1781         }
1782
1783         bss = conf->last_bss = conf->bss[0];
1784
1785         os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
1786         bss->ctrl_interface = os_strdup(ctrl_iface);
1787         if (bss->ctrl_interface == NULL) {
1788                 hostapd_config_free(conf);
1789                 return NULL;
1790         }
1791
1792         /* Reading configuration file skipped, will be done in SET!
1793          * From reading the configuration till the end has to be done in
1794          * SET
1795          */
1796         return conf;
1797 }
1798
1799
1800 static struct hostapd_iface * hostapd_data_alloc(
1801         struct hapd_interfaces *interfaces, struct hostapd_config *conf)
1802 {
1803         size_t i;
1804         struct hostapd_iface *hapd_iface =
1805                 interfaces->iface[interfaces->count - 1];
1806         struct hostapd_data *hapd;
1807
1808         hapd_iface->conf = conf;
1809         hapd_iface->num_bss = conf->num_bss;
1810
1811         hapd_iface->bss = os_zalloc(conf->num_bss *
1812                                     sizeof(struct hostapd_data *));
1813         if (hapd_iface->bss == NULL)
1814                 return NULL;
1815
1816         for (i = 0; i < conf->num_bss; i++) {
1817                 hapd = hapd_iface->bss[i] =
1818                         hostapd_alloc_bss_data(hapd_iface, conf, conf->bss[i]);
1819                 if (hapd == NULL)
1820                         return NULL;
1821                 hapd->msg_ctx = hapd;
1822         }
1823
1824         hapd_iface->interfaces = interfaces;
1825
1826         return hapd_iface;
1827 }
1828
1829
1830 int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
1831 {
1832         struct hostapd_config *conf = NULL;
1833         struct hostapd_iface *hapd_iface = NULL, *new_iface = NULL;
1834         struct hostapd_data *hapd;
1835         char *ptr;
1836         size_t i, j;
1837         const char *conf_file = NULL, *phy_name = NULL;
1838
1839         if (os_strncmp(buf, "bss_config=", 11) == 0) {
1840                 char *pos;
1841                 phy_name = buf + 11;
1842                 pos = os_strchr(phy_name, ':');
1843                 if (!pos)
1844                         return -1;
1845                 *pos++ = '\0';
1846                 conf_file = pos;
1847                 if (!os_strlen(conf_file))
1848                         return -1;
1849
1850                 hapd_iface = hostapd_interface_init_bss(interfaces, phy_name,
1851                                                         conf_file, 0);
1852                 if (!hapd_iface)
1853                         return -1;
1854                 for (j = 0; j < interfaces->count; j++) {
1855                         if (interfaces->iface[j] == hapd_iface)
1856                                 break;
1857                 }
1858                 if (j == interfaces->count) {
1859                         struct hostapd_iface **tmp;
1860                         tmp = os_realloc_array(interfaces->iface,
1861                                                interfaces->count + 1,
1862                                                sizeof(struct hostapd_iface *));
1863                         if (!tmp) {
1864                                 hostapd_interface_deinit_free(hapd_iface);
1865                                 return -1;
1866                         }
1867                         interfaces->iface = tmp;
1868                         interfaces->iface[interfaces->count++] = hapd_iface;
1869                         new_iface = hapd_iface;
1870                 }
1871
1872                 if (new_iface) {
1873                         if (interfaces->driver_init(hapd_iface) ||
1874                             hostapd_setup_interface(hapd_iface)) {
1875                                 interfaces->count--;
1876                                 goto fail;
1877                         }
1878                 } else {
1879                         /* Assign new BSS with bss[0]'s driver info */
1880                         hapd = hapd_iface->bss[hapd_iface->num_bss - 1];
1881                         hapd->driver = hapd_iface->bss[0]->driver;
1882                         hapd->drv_priv = hapd_iface->bss[0]->drv_priv;
1883                         os_memcpy(hapd->own_addr, hapd_iface->bss[0]->own_addr,
1884                                   ETH_ALEN);
1885
1886                         if (start_ctrl_iface_bss(hapd) < 0 ||
1887                             (hapd_iface->state == HAPD_IFACE_ENABLED &&
1888                              hostapd_setup_bss(hapd, -1))) {
1889                                 hostapd_cleanup(hapd);
1890                                 hapd_iface->bss[hapd_iface->num_bss - 1] = NULL;
1891                                 hapd_iface->conf->num_bss--;
1892                                 hapd_iface->num_bss--;
1893                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p %s",
1894                                            __func__, hapd, hapd->conf->iface);
1895                                 os_free(hapd);
1896                                 return -1;
1897                         }
1898                 }
1899                 return 0;
1900         }
1901
1902         ptr = os_strchr(buf, ' ');
1903         if (ptr == NULL)
1904                 return -1;
1905         *ptr++ = '\0';
1906
1907         if (os_strncmp(ptr, "config=", 7) == 0)
1908                 conf_file = ptr + 7;
1909
1910         for (i = 0; i < interfaces->count; i++) {
1911                 if (!os_strcmp(interfaces->iface[i]->conf->bss[0]->iface,
1912                                buf)) {
1913                         wpa_printf(MSG_INFO, "Cannot add interface - it "
1914                                    "already exists");
1915                         return -1;
1916                 }
1917         }
1918
1919         hapd_iface = hostapd_iface_alloc(interfaces);
1920         if (hapd_iface == NULL) {
1921                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
1922                            "for interface", __func__);
1923                 goto fail;
1924         }
1925
1926         if (conf_file && interfaces->config_read_cb) {
1927                 conf = interfaces->config_read_cb(conf_file);
1928                 if (conf && conf->bss)
1929                         os_strlcpy(conf->bss[0]->iface, buf,
1930                                    sizeof(conf->bss[0]->iface));
1931         } else
1932                 conf = hostapd_config_alloc(interfaces, buf, ptr);
1933         if (conf == NULL || conf->bss == NULL) {
1934                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
1935                            "for configuration", __func__);
1936                 goto fail;
1937         }
1938
1939         hapd_iface = hostapd_data_alloc(interfaces, conf);
1940         if (hapd_iface == NULL) {
1941                 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
1942                            "for hostapd", __func__);
1943                 goto fail;
1944         }
1945
1946         if (start_ctrl_iface(hapd_iface) < 0)
1947                 goto fail;
1948
1949         wpa_printf(MSG_INFO, "Add interface '%s'", conf->bss[0]->iface);
1950
1951         return 0;
1952
1953 fail:
1954         if (conf)
1955                 hostapd_config_free(conf);
1956         if (hapd_iface) {
1957                 if (hapd_iface->bss) {
1958                         for (i = 0; i < hapd_iface->num_bss; i++) {
1959                                 hapd = hapd_iface->bss[i];
1960                                 if (!hapd)
1961                                         continue;
1962                                 if (hapd_iface->interfaces &&
1963                                     hapd_iface->interfaces->ctrl_iface_deinit)
1964                                         hapd_iface->interfaces->
1965                                                 ctrl_iface_deinit(hapd);
1966                                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
1967                                            __func__, hapd_iface->bss[i],
1968                                            hapd->conf->iface);
1969                                 os_free(hapd);
1970                                 hapd_iface->bss[i] = NULL;
1971                         }
1972                         os_free(hapd_iface->bss);
1973                 }
1974                 wpa_printf(MSG_DEBUG, "%s: free iface %p",
1975                            __func__, hapd_iface);
1976                 os_free(hapd_iface);
1977         }
1978         return -1;
1979 }
1980
1981
1982 static int hostapd_remove_bss(struct hostapd_iface *iface, unsigned int idx)
1983 {
1984         size_t i;
1985
1986         wpa_printf(MSG_INFO, "Remove BSS '%s'", iface->conf->bss[idx]->iface);
1987
1988         /* Remove hostapd_data only if it has already been initialized */
1989         if (idx < iface->num_bss) {
1990                 struct hostapd_data *hapd = iface->bss[idx];
1991
1992                 hostapd_bss_deinit(hapd);
1993                 wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
1994                            __func__, hapd, hapd->conf->iface);
1995                 hostapd_config_free_bss(hapd->conf);
1996                 os_free(hapd);
1997
1998                 iface->num_bss--;
1999
2000                 for (i = idx; i < iface->num_bss; i++)
2001                         iface->bss[i] = iface->bss[i + 1];
2002         } else {
2003                 hostapd_config_free_bss(iface->conf->bss[idx]);
2004                 iface->conf->bss[idx] = NULL;
2005         }
2006
2007         iface->conf->num_bss--;
2008         for (i = idx; i < iface->conf->num_bss; i++)
2009                 iface->conf->bss[i] = iface->conf->bss[i + 1];
2010
2011         return 0;
2012 }
2013
2014
2015 int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
2016 {
2017         struct hostapd_iface *hapd_iface;
2018         size_t i, j, k = 0;
2019
2020         for (i = 0; i < interfaces->count; i++) {
2021                 hapd_iface = interfaces->iface[i];
2022                 if (hapd_iface == NULL)
2023                         return -1;
2024                 if (!os_strcmp(hapd_iface->conf->bss[0]->iface, buf)) {
2025                         wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
2026                         hapd_iface->driver_ap_teardown =
2027                                 !!(hapd_iface->drv_flags &
2028                                    WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2029
2030                         hostapd_interface_deinit_free(hapd_iface);
2031                         k = i;
2032                         while (k < (interfaces->count - 1)) {
2033                                 interfaces->iface[k] =
2034                                         interfaces->iface[k + 1];
2035                                 k++;
2036                         }
2037                         interfaces->count--;
2038                         return 0;
2039                 }
2040
2041                 for (j = 0; j < hapd_iface->conf->num_bss; j++) {
2042                         if (!os_strcmp(hapd_iface->conf->bss[j]->iface, buf)) {
2043                                 hapd_iface->driver_ap_teardown =
2044                                         !(hapd_iface->drv_flags &
2045                                           WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
2046                                 return hostapd_remove_bss(hapd_iface, j);
2047                         }
2048                 }
2049         }
2050         return -1;
2051 }
2052
2053
2054 /**
2055  * hostapd_new_assoc_sta - Notify that a new station associated with the AP
2056  * @hapd: Pointer to BSS data
2057  * @sta: Pointer to the associated STA data
2058  * @reassoc: 1 to indicate this was a re-association; 0 = first association
2059  *
2060  * This function will be called whenever a station associates with the AP. It
2061  * can be called from ieee802_11.c for drivers that export MLME to hostapd and
2062  * from drv_callbacks.c based on driver events for drivers that take care of
2063  * management frames (IEEE 802.11 authentication and association) internally.
2064  */
2065 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
2066                            int reassoc)
2067 {
2068         if (hapd->tkip_countermeasures) {
2069                 hostapd_drv_sta_deauth(hapd, sta->addr,
2070                                        WLAN_REASON_MICHAEL_MIC_FAILURE);
2071                 return;
2072         }
2073
2074         hostapd_prune_associations(hapd, sta->addr);
2075
2076         /* IEEE 802.11F (IAPP) */
2077         if (hapd->conf->ieee802_11f)
2078                 iapp_new_station(hapd->iapp, sta);
2079
2080 #ifdef CONFIG_P2P
2081         if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
2082                 sta->no_p2p_set = 1;
2083                 hapd->num_sta_no_p2p++;
2084                 if (hapd->num_sta_no_p2p == 1)
2085                         hostapd_p2p_non_p2p_sta_connected(hapd);
2086         }
2087 #endif /* CONFIG_P2P */
2088
2089         /* Start accounting here, if IEEE 802.1X and WPA are not used.
2090          * IEEE 802.1X/WPA code will start accounting after the station has
2091          * been authorized. */
2092         if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) {
2093                 ap_sta_set_authorized(hapd, sta, 1);
2094                 os_get_reltime(&sta->connected_time);
2095                 accounting_sta_start(hapd, sta);
2096         }
2097
2098         /* Start IEEE 802.1X authentication process for new stations */
2099         ieee802_1x_new_station(hapd, sta);
2100         if (reassoc) {
2101                 if (sta->auth_alg != WLAN_AUTH_FT &&
2102                     !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
2103                         wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
2104         } else
2105                 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
2106
2107         if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
2108                 wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
2109                            "for " MACSTR " (%d seconds - ap_max_inactivity)",
2110                            __func__, MAC2STR(sta->addr),
2111                            hapd->conf->ap_max_inactivity);
2112                 eloop_cancel_timeout(ap_handle_timer, hapd, sta);
2113                 eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
2114                                        ap_handle_timer, hapd, sta);
2115         }
2116 }
2117
2118
2119 const char * hostapd_state_text(enum hostapd_iface_state s)
2120 {
2121         switch (s) {
2122         case HAPD_IFACE_UNINITIALIZED:
2123                 return "UNINITIALIZED";
2124         case HAPD_IFACE_DISABLED:
2125                 return "DISABLED";
2126         case HAPD_IFACE_COUNTRY_UPDATE:
2127                 return "COUNTRY_UPDATE";
2128         case HAPD_IFACE_ACS:
2129                 return "ACS";
2130         case HAPD_IFACE_HT_SCAN:
2131                 return "HT_SCAN";
2132         case HAPD_IFACE_DFS:
2133                 return "DFS";
2134         case HAPD_IFACE_ENABLED:
2135                 return "ENABLED";
2136         }
2137
2138         return "UNKNOWN";
2139 }
2140
2141
2142 void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
2143 {
2144         wpa_printf(MSG_INFO, "%s: interface state %s->%s",
2145                    iface->conf->bss[0]->iface, hostapd_state_text(iface->state),
2146                    hostapd_state_text(s));
2147         iface->state = s;
2148 }
2149
2150
2151 #ifdef NEED_AP_MLME
2152
2153 static void free_beacon_data(struct beacon_data *beacon)
2154 {
2155         os_free(beacon->head);
2156         beacon->head = NULL;
2157         os_free(beacon->tail);
2158         beacon->tail = NULL;
2159         os_free(beacon->probe_resp);
2160         beacon->probe_resp = NULL;
2161         os_free(beacon->beacon_ies);
2162         beacon->beacon_ies = NULL;
2163         os_free(beacon->proberesp_ies);
2164         beacon->proberesp_ies = NULL;
2165         os_free(beacon->assocresp_ies);
2166         beacon->assocresp_ies = NULL;
2167 }
2168
2169
2170 static int hostapd_build_beacon_data(struct hostapd_iface *iface,
2171                                      struct beacon_data *beacon)
2172 {
2173         struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
2174         struct wpa_driver_ap_params params;
2175         int ret;
2176         struct hostapd_data *hapd = iface->bss[0];
2177
2178         os_memset(beacon, 0, sizeof(*beacon));
2179         ret = ieee802_11_build_ap_params(hapd, &params);
2180         if (ret < 0)
2181                 return ret;
2182
2183         ret = hostapd_build_ap_extra_ies(hapd, &beacon_extra,
2184                                          &proberesp_extra,
2185                                          &assocresp_extra);
2186         if (ret)
2187                 goto free_ap_params;
2188
2189         ret = -1;
2190         beacon->head = os_malloc(params.head_len);
2191         if (!beacon->head)
2192                 goto free_ap_extra_ies;
2193
2194         os_memcpy(beacon->head, params.head, params.head_len);
2195         beacon->head_len = params.head_len;
2196
2197         beacon->tail = os_malloc(params.tail_len);
2198         if (!beacon->tail)
2199                 goto free_beacon;
2200
2201         os_memcpy(beacon->tail, params.tail, params.tail_len);
2202         beacon->tail_len = params.tail_len;
2203
2204         if (params.proberesp != NULL) {
2205                 beacon->probe_resp = os_malloc(params.proberesp_len);
2206                 if (!beacon->probe_resp)
2207                         goto free_beacon;
2208
2209                 os_memcpy(beacon->probe_resp, params.proberesp,
2210                           params.proberesp_len);
2211                 beacon->probe_resp_len = params.proberesp_len;
2212         }
2213
2214         /* copy the extra ies */
2215         if (beacon_extra) {
2216                 beacon->beacon_ies = os_malloc(wpabuf_len(beacon_extra));
2217                 if (!beacon->beacon_ies)
2218                         goto free_beacon;
2219
2220                 os_memcpy(beacon->beacon_ies,
2221                           beacon_extra->buf, wpabuf_len(beacon_extra));
2222                 beacon->beacon_ies_len = wpabuf_len(beacon_extra);
2223         }
2224
2225         if (proberesp_extra) {
2226                 beacon->proberesp_ies =
2227                         os_malloc(wpabuf_len(proberesp_extra));
2228                 if (!beacon->proberesp_ies)
2229                         goto free_beacon;
2230
2231                 os_memcpy(beacon->proberesp_ies, proberesp_extra->buf,
2232                           wpabuf_len(proberesp_extra));
2233                 beacon->proberesp_ies_len = wpabuf_len(proberesp_extra);
2234         }
2235
2236         if (assocresp_extra) {
2237                 beacon->assocresp_ies =
2238                         os_malloc(wpabuf_len(assocresp_extra));
2239                 if (!beacon->assocresp_ies)
2240                         goto free_beacon;
2241
2242                 os_memcpy(beacon->assocresp_ies, assocresp_extra->buf,
2243                           wpabuf_len(assocresp_extra));
2244                 beacon->assocresp_ies_len = wpabuf_len(assocresp_extra);
2245         }
2246
2247         ret = 0;
2248 free_beacon:
2249         /* if the function fails, the caller should not free beacon data */
2250         if (ret)
2251                 free_beacon_data(beacon);
2252
2253 free_ap_extra_ies:
2254         hostapd_free_ap_extra_ies(hapd, beacon_extra, proberesp_extra,
2255                                   assocresp_extra);
2256 free_ap_params:
2257         ieee802_11_free_ap_params(&params);
2258         return ret;
2259 }
2260
2261
2262 /*
2263  * TODO: This flow currently supports only changing frequency within the
2264  * same hw_mode. Any other changes to MAC parameters or provided settings (even
2265  * width) are not supported.
2266  */
2267 static int hostapd_change_config_freq(struct hostapd_data *hapd,
2268                                       struct hostapd_config *conf,
2269                                       struct hostapd_freq_params *params,
2270                                       struct hostapd_freq_params *old_params)
2271 {
2272         int channel;
2273
2274         if (!params->channel) {
2275                 /* check if the new channel is supported by hw */
2276                 channel = hostapd_hw_get_channel(hapd, params->freq);
2277                 if (!channel)
2278                         return -1;
2279         } else {
2280                 channel = params->channel;
2281         }
2282
2283         /* if a pointer to old_params is provided we save previous state */
2284         if (old_params) {
2285                 old_params->channel = conf->channel;
2286                 old_params->ht_enabled = conf->ieee80211n;
2287                 old_params->sec_channel_offset = conf->secondary_channel;
2288         }
2289
2290         conf->channel = channel;
2291         conf->ieee80211n = params->ht_enabled;
2292         conf->secondary_channel = params->sec_channel_offset;
2293
2294         /* TODO: maybe call here hostapd_config_check here? */
2295
2296         return 0;
2297 }
2298
2299
2300 static int hostapd_fill_csa_settings(struct hostapd_iface *iface,
2301                                      struct csa_settings *settings)
2302 {
2303         struct hostapd_freq_params old_freq;
2304         int ret;
2305
2306         os_memset(&old_freq, 0, sizeof(old_freq));
2307         if (!iface || !iface->freq || iface->csa_in_progress)
2308                 return -1;
2309
2310         ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
2311                                          &settings->freq_params,
2312                                          &old_freq);
2313         if (ret)
2314                 return ret;
2315
2316         ret = hostapd_build_beacon_data(iface, &settings->beacon_after);
2317
2318         /* change back the configuration */
2319         hostapd_change_config_freq(iface->bss[0], iface->conf,
2320                                    &old_freq, NULL);
2321
2322         if (ret)
2323                 return ret;
2324
2325         /* set channel switch parameters for csa ie */
2326         iface->cs_freq_params = settings->freq_params;
2327         iface->cs_count = settings->cs_count;
2328         iface->cs_block_tx = settings->block_tx;
2329
2330         ret = hostapd_build_beacon_data(iface, &settings->beacon_csa);
2331         if (ret) {
2332                 free_beacon_data(&settings->beacon_after);
2333                 return ret;
2334         }
2335
2336         settings->counter_offset_beacon = iface->cs_c_off_beacon;
2337         settings->counter_offset_presp = iface->cs_c_off_proberesp;
2338
2339         return 0;
2340 }
2341
2342
2343 void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
2344 {
2345         os_memset(&hapd->iface->cs_freq_params, 0,
2346                   sizeof(hapd->iface->cs_freq_params));
2347         hapd->iface->cs_count = 0;
2348         hapd->iface->cs_block_tx = 0;
2349         hapd->iface->cs_c_off_beacon = 0;
2350         hapd->iface->cs_c_off_proberesp = 0;
2351         hapd->iface->csa_in_progress = 0;
2352 }
2353
2354
2355 int hostapd_switch_channel(struct hostapd_data *hapd,
2356                            struct csa_settings *settings)
2357 {
2358         int ret;
2359         ret = hostapd_fill_csa_settings(hapd->iface, settings);
2360         if (ret)
2361                 return ret;
2362
2363         ret = hostapd_drv_switch_channel(hapd, settings);
2364         free_beacon_data(&settings->beacon_csa);
2365         free_beacon_data(&settings->beacon_after);
2366
2367         if (ret) {
2368                 /* if we failed, clean cs parameters */
2369                 hostapd_cleanup_cs_params(hapd);
2370                 return ret;
2371         }
2372
2373         hapd->iface->csa_in_progress = 1;
2374         return 0;
2375 }
2376
2377 #endif /* NEED_AP_MLME */