text: /*
   * hostapd / Initialization and configuration
   * Copyright (c) 2002-2014, Jouni Malinen <j@w1.fi>
   *
   * This software may be distributed under the terms of the BSD license.
   * See README for more details.
   */
  #include "utils/includes.h"
  #include "utils/common.h"
  #include "utils/eloop.h"
  #include "common/ieee802_11_defs.h"
  #include "common/wpa_ctrl.h"
  #include "common/hw_features_common.h"
  #include "ap/hostapd.h"
  #include "ap/sta_info.h"
  #include "accounting.h"
  #include "ap_list.h"
  #include "beacon.h"
  #include "ieee802_1x.h"
  #include "ieee802_11_auth.h"
  #include "vlan_init.h"
  #include "wpa_auth.h"
  #include "wps_hostapd.h"
  #include "hw_features.h"
  #include "wpa_auth_glue.h"
  #include "ap_drv_ops.h"
  #include "ap_config.h"
  #include "p2p_hostapd.h"
  #include "ap/dfs.h"
  #include "ieee802_11.h"
  #include "bss_load.h"
  #include "errno-base.h"
  #include "include.h"
  #include "uart_pub.h"
  
  static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason);
  static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd);
  static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd);
  static int setup_interface2(struct hostapd_iface *iface);
  static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx);
  
  
  int hostapd_for_each_interface(struct hapd_interfaces *interfaces,
  			       int (*cb)(struct hostapd_iface *iface,
  					 void *ctx), void *ctx)
  {
  	size_t i;
  	int ret;
  
  	for (i = 0; i < interfaces->count; i++) {
  		ret = cb(interfaces->iface[i], ctx);
  		if (ret)
  			return ret;
  	}
  
  	return 0;
  }
  
  
  static void hostapd_reload_bss(struct hostapd_data *hapd)
  {
  	struct hostapd_ssid *ssid;
  
  #ifndef CONFIG_NO_RADIUS
  	radius_client_reconfig(hapd->radius, hapd->conf->radius);
  #endif /* CONFIG_NO_RADIUS */
  
  	ssid = &hapd->conf->ssid;
  	if (!ssid->wpa_psk_set && ssid->wpa_psk && !ssid->wpa_psk->next &&
  	    ssid->wpa_passphrase_set && ssid->wpa_passphrase) {
  		/*
  		 * Force PSK to be derived again since SSID or passphrase may
  		 * have changed.
  		 */
  		hostapd_config_clear_wpa_psk(&hapd->conf->ssid.wpa_psk);
  	}
  	if (hostapd_setup_wpa_psk(hapd->conf)) {
  		wpa_printf(MSG_ERROR, "Failed to re-configure WPA PSK "
  			   "after reloading configuration");
  	}
  
  	if (hapd->conf->ieee802_1x || hapd->conf->wpa)
  		hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 1);
  	else
  		hostapd_set_drv_ieee8021x(hapd, hapd->conf->iface, 0);
  
  	if ((hapd->conf->wpa || hapd->conf->osen) && hapd->wpa_auth == NULL) {
  		hostapd_setup_wpa(hapd);
  		if (hapd->wpa_auth)
  			wpa_init_keys(hapd->wpa_auth);
  	} else if (hapd->conf->wpa) {
  		const u8 *wpa_ie;
  		size_t wpa_ie_len = 0;
  		hostapd_reconfig_wpa(hapd);
  		wpa_ie = wpa_auth_get_wpa_ie(hapd->wpa_auth, &wpa_ie_len);
  		if (hostapd_set_generic_elem(hapd, wpa_ie, wpa_ie_len))
  			wpa_printf(MSG_ERROR, "Failed to configure WPA IE for "
  				   "the kernel driver.");
  	} else if (hapd->wpa_auth) {
  		wpa_deinit(hapd->wpa_auth);
  		hapd->wpa_auth = NULL;
  		hostapd_set_privacy(hapd, 0);
  		hostapd_setup_encryption(hapd->conf->iface, hapd);
  		hostapd_set_generic_elem(hapd, (u8 *) "", 0);
  	}
  
  	ieee802_11_set_beacon(hapd);
  	hostapd_update_wps(hapd);
  
  	if (hapd->conf->ssid.ssid_set &&
  	    hostapd_set_ssid(hapd, hapd->conf->ssid.ssid,
  			     hapd->conf->ssid.ssid_len)) {
  		wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
  		/* try to continue */
  	}
  	wpa_printf(MSG_DEBUG, "Reconfigured interface %s", hapd->conf->iface);
  }
  
  
  static void hostapd_clear_old(struct hostapd_iface *iface)
  {
  	size_t j;
  
  	/*
  	 * Deauthenticate all stations since the new configuration may not
  	 * allow them to use the BSS anymore.
  	 */
  	for (j = 0; j < iface->num_bss; j++) {
  		hostapd_flush_old_stations(iface->bss[j],
  					   WLAN_REASON_PREV_AUTH_NOT_VALID);
  		hostapd_broadcast_wep_clear(iface->bss[j]);
  
  #ifndef CONFIG_NO_RADIUS
  		/* TODO: update dynamic data based on changed configuration
  		 * items (e.g., open/close sockets, etc.) */
  		radius_client_flush(iface->bss[j]->radius, 0);
  #endif /* CONFIG_NO_RADIUS */
  	}
  }
  
  
  int hostapd_reload_config(struct hostapd_iface *iface)
  {
  	struct hostapd_data *hapd = iface->bss[0];
  	struct hostapd_config *newconf, *oldconf;
  	size_t j;
  
  #if CFG_NEW_SUPP
  	if (hostapd_csa_in_progress(iface)) {
  		return -2;
  	}
  #endif
  
  	if (iface->config_fname == NULL) {
  		/* Only in-memory config in use - assume it has been updated */
  		hostapd_clear_old(iface);
  		for (j = 0; j < iface->num_bss; j++)
  			hostapd_reload_bss(iface->bss[j]);
  		return 0;
  	}
  
  	if (iface->interfaces == NULL ||
  	    iface->interfaces->config_read_cb == NULL)
  		return -1;
  	newconf = iface->interfaces->config_read_cb(iface->config_fname);
  	if (newconf == NULL)
  		return -1;
  
  	hostapd_clear_old(iface);
  
  	oldconf = hapd->iconf;
  	iface->conf = newconf;
  
  	for (j = 0; j < iface->num_bss; j++) {
  		hapd = iface->bss[j];
  		hapd->iconf = newconf;
  		hapd->iconf->channel = oldconf->channel;
  		hapd->iconf->acs = oldconf->acs;
  		hapd->iconf->secondary_channel = oldconf->secondary_channel;
  		hapd->iconf->ieee80211n = oldconf->ieee80211n;
  		hapd->iconf->ieee80211ac = oldconf->ieee80211ac;
  		hapd->iconf->ht_capab = oldconf->ht_capab;
  		hapd->iconf->vht_capab = oldconf->vht_capab;
  		hapd->iconf->vht_oper_chwidth = oldconf->vht_oper_chwidth;
  		hapd->iconf->vht_oper_centr_freq_seg0_idx =
  			oldconf->vht_oper_centr_freq_seg0_idx;
  		hapd->iconf->vht_oper_centr_freq_seg1_idx =
  			oldconf->vht_oper_centr_freq_seg1_idx;
  		hapd->conf = newconf->bss[j];
  		hostapd_reload_bss(hapd);
  	}
  
  	hostapd_config_free(oldconf);
  
  
  	return 0;
  }
  
  
  static void hostapd_broadcast_key_clear_iface(struct hostapd_data *hapd,
  					      const char *ifname)
  {
  	int i;
  
  	for (i = 0; i < NUM_WEP_KEYS; i++) {
  		if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE, NULL, i,
  					0, NULL, 0, NULL, 0)) {
  			wpa_printf(MSG_DEBUG, "Failed to clear default "
  				   "encryption keys (ifname=%s keyidx=%d)",
  				   ifname, i);
  		}
  	}
  #ifdef CONFIG_IEEE80211W
  	if (hapd->conf->ieee80211w) {
  		for (i = NUM_WEP_KEYS; i < NUM_WEP_KEYS + 2; i++) {
  			if (hostapd_drv_set_key(ifname, hapd, WPA_ALG_NONE,
  						NULL, i, 0, NULL,
  						0, NULL, 0)) {
  				wpa_printf(MSG_DEBUG, "Failed to clear "
  					   "default mgmt encryption keys "
  					   "(ifname=%s keyidx=%d)", ifname, i);
  			}
  		}
  	}
  #endif /* CONFIG_IEEE80211W */
  }
  
  
  static int hostapd_broadcast_wep_clear(struct hostapd_data *hapd)
  {
  	hostapd_broadcast_key_clear_iface(hapd, hapd->conf->iface);
  	return 0;
  }
  
  
  static int hostapd_broadcast_wep_set(struct hostapd_data *hapd)
  {
  	int errors = 0, idx;
  	struct hostapd_ssid *ssid = &hapd->conf->ssid;
  
  	idx = ssid->wep.idx;
  	if (ssid->wep.default_len &&
  	    hostapd_drv_set_key(hapd->conf->iface,
  				hapd, WPA_ALG_WEP, broadcast_ether_addr, idx,
  				1, NULL, 0, ssid->wep.key[idx],
  				ssid->wep.len[idx])) {
  		wpa_printf(MSG_WARNING, "Could not set WEP encryption.");
  		errors++;
  	}
  
  	return errors;
  }
  
  
  static void hostapd_free_hapd_data(struct hostapd_data *hapd)
  {
  	os_free(hapd->probereq_cb);
  	hapd->probereq_cb = NULL;
  	hapd->num_probereq_cb = 0;
  
  #ifdef CONFIG_P2P
  	wpabuf_free(hapd->p2p_beacon_ie);
  	hapd->p2p_beacon_ie = NULL;
  	wpabuf_free(hapd->p2p_probe_resp_ie);
  	hapd->p2p_probe_resp_ie = NULL;
  #endif /* CONFIG_P2P */
  
  	if (!hapd->started) {
  		wpa_printf(MSG_ERROR, "%s: Interface %s wasn't started",
  			   __func__, hapd->conf->iface);
  		return;
  	}
  	hapd->started = 0;
  
  	wpa_printf(MSG_DEBUG, "%s(%s)", __func__, hapd->conf->iface);
  #ifdef CONFIG_FULL_HOSTAPD
  	iapp_deinit(hapd->iapp);
  	hapd->iapp = NULL;
  	accounting_deinit(hapd);
  #endif
  	hostapd_deinit_wpa(hapd);
  #ifdef CONFIG_FULL_HOSTAPD
  	vlan_deinit(hapd);
  	hostapd_acl_deinit(hapd);
  #endif
  #ifndef CONFIG_NO_RADIUS
  	radius_client_deinit(hapd->radius);
  	hapd->radius = NULL;
  	radius_das_deinit(hapd->radius_das);
  	hapd->radius_das = NULL;
  #endif /* CONFIG_NO_RADIUS */
  
  	hostapd_deinit_wps(hapd);
  
  	if (hapd->interface_added) {
  		hapd->interface_added = 0;
  		if (hostapd_if_remove(hapd, WPA_IF_AP_BSS, hapd->conf->iface)) {
  			wpa_printf(MSG_WARNING,
  				   "Failed to remove BSS interface %s",
  				   hapd->conf->iface);
  			hapd->interface_added = 1;
  		} else {
  			/*
  			 * Since this was a dynamically added interface, the
  			 * driver wrapper may have removed its internal instance
  			 * and hapd->drv_priv is not valid anymore.
  			 */
  			hapd->drv_priv = NULL;
  		}
  	}
  
  	wpabuf_free(hapd->time_adv);
  
  #ifdef CONFIG_INTERWORKING
  	gas_serv_deinit(hapd);
  #endif /* CONFIG_INTERWORKING */
  
  #ifdef CONFIG_FULL_HOSTAPD
  	bss_load_update_deinit(hapd);
  	ndisc_snoop_deinit(hapd);
  	dhcp_snoop_deinit(hapd);
  	x_snoop_deinit(hapd);
  #endif
  #ifdef CONFIG_SQLITE
  	bin_clear_free(hapd->tmp_eap_user.identity,
  		       hapd->tmp_eap_user.identity_len);
  	bin_clear_free(hapd->tmp_eap_user.password,
  		       hapd->tmp_eap_user.password_len);
  #endif /* CONFIG_SQLITE */
  
  #ifdef CONFIG_MESH
  	wpabuf_free(hapd->mesh_pending_auth);
  	hapd->mesh_pending_auth = NULL;
  #endif /* CONFIG_MESH */
  }
  
  
  /**
   * hostapd_cleanup - Per-BSS cleanup (deinitialization)
   * @hapd: Pointer to BSS data
   *
   * This function is used to free all per-BSS data structures and resources.
   * Most of the modules that are initialized in hostapd_setup_bss() are
   * deinitialized here.
   */
  static void hostapd_cleanup(struct hostapd_data *hapd)
  {
  	wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s))", __func__, hapd,
  		   hapd->conf->iface);
  	if (hapd->iface->interfaces &&
  	    hapd->iface->interfaces->ctrl_iface_deinit)
  		hapd->iface->interfaces->ctrl_iface_deinit(hapd);
  	hostapd_free_hapd_data(hapd);
  }
  
  
  static void sta_track_deinit(struct hostapd_iface *iface)
  {
  	struct hostapd_sta_info *info;
  
  	if (!iface->num_sta_seen)
  		return;
  
  	while (0 != (info = dl_list_first(&iface->sta_seen, struct hostapd_sta_info,
  				     list))) {
  		dl_list_del(&info->list);
  		iface->num_sta_seen--;
  		sta_track_del(info);
  	}
  }
  
  
  static void hostapd_cleanup_iface_partial(struct hostapd_iface *iface)
  {
  	wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
  #ifdef CONFIG_IEEE80211N
  #ifdef NEED_AP_MLME
  	hostapd_stop_setup_timers(iface);
  #endif /* NEED_AP_MLME */
  #endif /* CONFIG_IEEE80211N */
  
  	hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
  	iface->hw_features = NULL;
  
  	os_free(iface->current_rates);
  	iface->current_rates = NULL;
  
  	os_free(iface->basic_rates);
  	iface->basic_rates = NULL;
  
  	ap_list_deinit(iface);
  	sta_track_deinit(iface);
  }
  
  
  /**
   * hostapd_cleanup_iface - Complete per-interface cleanup
   * @iface: Pointer to interface data
   *
   * This function is called after per-BSS data structures are deinitialized
   * with hostapd_cleanup().
   */
  static void hostapd_cleanup_iface(struct hostapd_iface *iface)
  {
  	wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
  	eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
  
  	hostapd_cleanup_iface_partial(iface);
  	hostapd_config_free(iface->conf);
  	iface->conf = NULL;
  
  	os_free(iface->config_fname);
  	os_free(iface->bss);
  	wpa_printf(MSG_DEBUG, "%s: free iface=%p", __func__, iface);
  	os_free(iface);
  }
  
  
  static void hostapd_clear_wep(struct hostapd_data *hapd)
  {
  	if (hapd->drv_priv && !hapd->iface->driver_ap_teardown) {
  		hostapd_set_privacy(hapd, 0);
  		hostapd_broadcast_wep_clear(hapd);
  	}
  }
  
  
  static int hostapd_setup_encryption(char *iface, struct hostapd_data *hapd)
  {
  	int i;
  
  	hostapd_broadcast_wep_set(hapd);
  
  	if (hapd->conf->ssid.wep.default_len) {
  		hostapd_set_privacy(hapd, 1);
  		return 0;
  	}
  
  	/*
  	 * When IEEE 802.1X is not enabled, the driver may need to know how to
  	 * set authentication algorithms for static WEP.
  	 */
  	hostapd_drv_set_authmode(hapd, hapd->conf->auth_algs);
  
  	for (i = 0; i < 4; i++) {
  		if (hapd->conf->ssid.wep.key[i] &&
  		    hostapd_drv_set_key(iface, hapd, WPA_ALG_WEP, NULL, i,
  					i == hapd->conf->ssid.wep.idx, NULL, 0,
  					hapd->conf->ssid.wep.key[i],
  					hapd->conf->ssid.wep.len[i])) {
  			wpa_printf(MSG_WARNING, "Could not set WEP "
  				   "encryption.");
  			return -1;
  		}
  		if (hapd->conf->ssid.wep.key[i] &&
  		    i == hapd->conf->ssid.wep.idx)
  			hostapd_set_privacy(hapd, 1);
  	}
  
  	return 0;
  }
  
  
  static int hostapd_flush_old_stations(struct hostapd_data *hapd, u16 reason)
  {
  	int ret = 0;
  	u8 addr[ETH_ALEN];
  
  	if (hostapd_drv_none(hapd) || hapd->drv_priv == NULL)
  		return 0;
  
  	if (!hapd->iface->driver_ap_teardown) {
  		wpa_dbg(hapd->msg_ctx, MSG_DEBUG,
  			"Flushing old station entries");
  
  		if (hostapd_flush(hapd)) {
  			wpa_msg(hapd->msg_ctx, MSG_WARNING,
  				"Could not connect to kernel driver");
  			ret = -1;
  		}
  	}
  	wpa_dbg(hapd->msg_ctx, MSG_DEBUG, "Deauthenticate all stations");
  	os_memset(addr, 0xff, ETH_ALEN);
  	hostapd_drv_sta_deauth(hapd, addr, reason);
  	hostapd_free_stas(hapd);
  
  	return ret;
  }
  
  
  static void hostapd_bss_deinit_no_free(struct hostapd_data *hapd)
  {
  	hostapd_free_stas(hapd);
  	hostapd_flush_old_stations(hapd, WLAN_REASON_DEAUTH_LEAVING);
  	hostapd_clear_wep(hapd);
  }
  
  
  /**
   * hostapd_validate_bssid_configuration - Validate BSSID configuration
   * @iface: Pointer to interface data
   * Returns: 0 on success, -1 on failure
   *
   * This function is used to validate that the configured BSSIDs are valid.
   */
  static int hostapd_validate_bssid_configuration(struct hostapd_iface *iface)
  {
  	u8 mask[ETH_ALEN] = { 0 };
  	struct hostapd_data *hapd = iface->bss[0];
  	unsigned int i = iface->conf->num_bss, bits = 0, j;
  	int auto_addr = 0;
  
  	if (hostapd_drv_none(hapd))
  		return 0;
  
  	if (iface->conf->use_driver_iface_addr)
  		return 0;
  
  	/* Generate BSSID mask that is large enough to cover the BSSIDs. */
  
  	/* Determine the bits necessary to cover the number of BSSIDs. */
  	for (i--; i; i >>= 1)
  		bits++;
  
  	/* Determine the bits necessary to any configured BSSIDs,
  	   if they are higher than the number of BSSIDs. */
  	for (j = 0; j < iface->conf->num_bss; j++) {
  		if (is_zero_ether_addr(iface->conf->bss[j]->bssid)) {
  			if (j)
  				auto_addr++;
  			continue;
  		}
  
  		for (i = 0; i < ETH_ALEN; i++) {
  			mask[i] |=
  				iface->conf->bss[j]->bssid[i] ^
  				hapd->own_addr[i];
  		}
  	}
  
  	if (!auto_addr)
  		goto skip_mask_ext;
  
  	for (i = 0; i < ETH_ALEN && mask[i] == 0; i++)
  		;
  	j = 0;
  	if (i < ETH_ALEN) {
  		j = (5 - i) * 8;
  
  		while (mask[i] != 0) {
  			mask[i] >>= 1;
  			j++;
  		}
  	}
  
  	if (bits < j)
  		bits = j;
  
  	if (bits > 40) {
  		wpa_printf(MSG_ERROR, "Too many bits in the BSSID mask (%u)",
  			   bits);
  		return -1;
  	}
  
  	os_memset(mask, 0xff, ETH_ALEN);
  	j = bits / 8;
  	for (i = 5; i > 5 - j; i--)
  		mask[i] = 0;
  	j = bits % 8;
  	while (j--)
  		mask[i] <<= 1;
  
  skip_mask_ext:
  	wpa_printf(MSG_DEBUG, "BSS count %lu, BSSID mask " MACSTR " (%d bits)",
  		   (unsigned long) iface->conf->num_bss, MAC2STR(mask), bits);
  
  	if (!auto_addr)
  		return 0;
  
  	for (i = 0; i < ETH_ALEN; i++) {
  		if ((hapd->own_addr[i] & mask[i]) != hapd->own_addr[i]) {
  			wpa_printf(MSG_ERROR, "Invalid BSSID mask " MACSTR
  				   " for start address " MACSTR ".",
  				   MAC2STR(mask), MAC2STR(hapd->own_addr));
  			wpa_printf(MSG_ERROR, "Start address must be the "
  				   "first address in the block (i.e., addr "
  				   "AND mask == addr).");
  			return -1;
  		}
  	}
  
  	return 0;
  }
  
  
  static int mac_in_conf(struct hostapd_config *conf, const void *a)
  {
  	size_t i;
  
  	for (i = 0; i < conf->num_bss; i++) {
  		if (hostapd_mac_comp(conf->bss[i]->bssid, a) == 0) {
  			return 1;
  		}
  	}
  
  	return 0;
  }
  
  
  /**
   * hostapd_setup_bss - Per-BSS setup (initialization)
   * @hapd: Pointer to BSS data
   * @first: Whether this BSS is the first BSS of an interface; -1 = not first,
   *	but interface may exist
   *
   * This function is used to initialize all per-BSS data structures and
   * resources. This gets called in a loop for each BSS when an interface is
   * initialized. Most of the modules that are initialized here will be
   * deinitialized in hostapd_cleanup().
   */
  static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
  {
  	struct hostapd_bss_config *conf = hapd->conf;
  	u8 ssid[SSID_MAX_LEN + 1];
  	int ssid_len, set_ssid;
  	char force_ifname[IFNAMSIZ];
  	u8 if_addr[ETH_ALEN];
  	int flush_old_stations = 1;
  
  	wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s), first=%d)",
  		   __func__, hapd, conf->iface, first);
  
  #ifdef EAP_SERVER_TNC
  	if (conf->tnc && tncs_global_init() < 0) {
  		wpa_printf(MSG_ERROR, "Failed to initialize TNCS");
  		return -1;
  	}
  #endif /* EAP_SERVER_TNC */
  
  	if (hapd->started) {
  		wpa_printf(MSG_ERROR, "%s: Interface %s was already started",
  			   __func__, conf->iface);
  		return -1;
  	}
  	hapd->started = 1;
  
  	if (!first || first == -1) {
  		u8 *addr = hapd->own_addr;
  
  		if (!is_zero_ether_addr(conf->bssid)) {
  			/* Allocate the configured BSSID. */
  			os_memcpy(hapd->own_addr, conf->bssid, ETH_ALEN);
  
  			if (hostapd_mac_comp(hapd->own_addr,
  					     hapd->iface->bss[0]->own_addr) ==
  			    0) {
  				wpa_printf(MSG_ERROR, "BSS '%s' may not have "
  					   "BSSID set to the MAC address of "
  					   "the radio", conf->iface);
  				return -1;
  			}
  		} else if (hapd->iconf->use_driver_iface_addr) {
  			addr = NULL;
  		} else {
  			/* Allocate the next available BSSID. */
  			do {
  				inc_byte_array(hapd->own_addr, ETH_ALEN);
  			} while (mac_in_conf(hapd->iconf, hapd->own_addr));
  		}
  
  		hapd->interface_added = 1;
  		if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
  				   conf->iface, addr, hapd,
  				   &hapd->drv_priv, force_ifname, if_addr,
  #ifdef CONFIG_FULL_HOSTAPD
  				   conf->bridge[0] ? conf->bridge : NULL,
  #else
  				   NULL,
  #endif
  				   first == -1)) {
  			wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
  				   MACSTR ")", MAC2STR(hapd->own_addr));
  			hapd->interface_added = 0;
  			return -1;
  		}
  
  		if (!addr)
  			os_memcpy(hapd->own_addr, if_addr, ETH_ALEN);
  	}
  
  	if (conf->wmm_enabled < 0)
  		conf->wmm_enabled = hapd->iconf->ieee80211n;
  
  #ifdef CONFIG_MESH
  	if (hapd->iface->mconf == NULL)
  		flush_old_stations = 0;
  #endif /* CONFIG_MESH */
  
  	if (flush_old_stations)
  		hostapd_flush_old_stations(hapd,
  					   WLAN_REASON_PREV_AUTH_NOT_VALID);
  	hostapd_set_privacy(hapd, 0);
  
  	hostapd_broadcast_wep_clear(hapd);
  	if (hostapd_setup_encryption(conf->iface, hapd))
  		return -1;
  
  	/*
  	 * Fetch the SSID from the system and use it or,
  	 * if one was specified in the config file, verify they
  	 * match.
  	 */
  	ssid_len = hostapd_get_ssid(hapd, ssid, sizeof(ssid));
  	if (ssid_len < 0) {
  		wpa_printf(MSG_ERROR, "Could not read SSID from system");
  		return -1;
  	}
  	if (conf->ssid.ssid_set) {
  		/*
  		 * If SSID is specified in the config file and it differs
  		 * from what is being used then force installation of the
  		 * new SSID.
  		 */
  		set_ssid = (conf->ssid.ssid_len != (size_t) ssid_len ||
  			    os_memcmp(conf->ssid.ssid, ssid, ssid_len) != 0);
  	} else {
  		/*
  		 * No SSID in the config file; just use the one we got
  		 * from the system.
  		 */
  		set_ssid = 0;
  		conf->ssid.ssid_len = ssid_len;
  		os_memcpy(conf->ssid.ssid, ssid, conf->ssid.ssid_len);
  	}
  
  	if (!hostapd_drv_none(hapd)) {
  		wpa_printf(MSG_ERROR, "Using interface %s with hwaddr " MACSTR
  			   " and ssid \"%s\"",
  			   conf->iface, MAC2STR(hapd->own_addr),
  			   wpa_ssid_txt(conf->ssid.ssid, conf->ssid.ssid_len));
  	}
  
  	if (hostapd_setup_wpa_psk(conf)) {
  		wpa_printf(MSG_ERROR, "WPA-PSK setup failed.");
  		return -1;
  	}
  
  	/* Set SSID for the kernel driver (to be used in beacon and probe
  	 * response frames) */
  	if (set_ssid && hostapd_set_ssid(hapd, conf->ssid.ssid,
  					 conf->ssid.ssid_len)) {
  		wpa_printf(MSG_ERROR, "Could not set SSID for kernel driver");
  		return -1;
  	}
  
  #ifndef CONFIG_NO_RADIUS
  	hapd->radius = radius_client_init(hapd, conf->radius);
  	if (hapd->radius == NULL) {
  		wpa_printf(MSG_ERROR, "RADIUS client initialization failed.");
  		return -1;
  	}
  
  	if (conf->radius_das_port) {
  		struct radius_das_conf das_conf;
  		os_memset(&das_conf, 0, sizeof(das_conf));
  		das_conf.port = conf->radius_das_port;
  		das_conf.shared_secret = conf->radius_das_shared_secret;
  		das_conf.shared_secret_len =
  			conf->radius_das_shared_secret_len;
  		das_conf.client_addr = &conf->radius_das_client_addr;
  		das_conf.time_window = conf->radius_das_time_window;
  		das_conf.require_event_timestamp =
  			conf->radius_das_require_event_timestamp;
  		das_conf.ctx = hapd;
  		das_conf.disconnect = hostapd_das_disconnect;
  		hapd->radius_das = radius_das_init(&das_conf);
  		if (hapd->radius_das == NULL) {
  			wpa_printf(MSG_ERROR, "RADIUS DAS initialization "
  				   "failed.");
  			return -1;
  		}
  	}
  #endif /* CONFIG_NO_RADIUS */
  
  	if (hostapd_acl_init(hapd)) {
  		wpa_printf(MSG_ERROR, "ACL initialization failed.");
  		return -1;
  	}
  	if (hostapd_init_wps(hapd, conf))
  		return -1;
  
  #ifdef CONFIG_FULL_HOSTAPD
  	if (authsrv_init(hapd) < 0)
  		return -1;
  
  	if (ieee802_1x_init(hapd)) {
  		wpa_printf(MSG_ERROR, "IEEE 802.1X initialization failed.");
  		return -1;
  	}
  #endif
  
  	if ((conf->wpa || conf->osen) && hostapd_setup_wpa(hapd))
  		return -1;
  
  	if (accounting_init(hapd)) {
  		wpa_printf(MSG_ERROR, "Accounting initialization failed.");
  		return -1;
  	}
  
  #ifdef CONFIG_FULL_HOSTAPD
  	if (conf->ieee802_11f &&
  	    (hapd->iapp = iapp_init(hapd, conf->iapp_iface)) == NULL) {
  		wpa_printf(MSG_ERROR, "IEEE 802.11F (IAPP) initialization "
  			   "failed.");
  		return -1;
  	}
  #endif
  #ifdef CONFIG_INTERWORKING
  	if (gas_serv_init(hapd)) {
  		wpa_printf(MSG_ERROR, "GAS server initialization failed");
  		return -1;
  	}
  
  	if (conf->qos_map_set_len &&
  	    hostapd_drv_set_qos_map(hapd, conf->qos_map_set,
  				    conf->qos_map_set_len)) {
  		wpa_printf(MSG_ERROR, "Failed to initialize QoS Map");
  		return -1;
  	}
  #endif /* CONFIG_INTERWORKING */
  
  #ifdef CONFIG_FULL_HOSTAPD
  	if (conf->bss_load_update_period && bss_load_update_init(hapd)) {
  		wpa_printf(MSG_ERROR, "BSS Load initialization failed");
  		return -1;
  	}
  
  	if (conf->proxy_arp) {
  		if (x_snoop_init(hapd)) {
  			wpa_printf(MSG_ERROR,
  				   "Generic snooping infrastructure initialization failed");
  			return -1;
  		}
  
  		if (dhcp_snoop_init(hapd)) {
  			wpa_printf(MSG_ERROR,
  				   "DHCP snooping initialization failed");
  			return -1;
  		}
  
  		if (ndisc_snoop_init(hapd)) {
  			wpa_printf(MSG_ERROR,
  				   "Neighbor Discovery snooping initialization failed");
  			return -1;
  		}
  	}
  
  	if (!hostapd_drv_none(hapd) && vlan_init(hapd)) {
  		wpa_printf(MSG_ERROR, "VLAN initialization failed.");
  		return -1;
  	}
  #endif
  
  	if (!conf->start_disabled && ieee802_11_set_beacon(hapd) < 0)
  		return -1;
  
  	if (hapd->wpa_auth && wpa_init_keys(hapd->wpa_auth) < 0)
  		return -1;
  
  	if (hapd->driver && hapd->driver->set_operstate)
  		hapd->driver->set_operstate(hapd->drv_priv, 1);
  
  	return 0;
  }
  
  
  static void hostapd_tx_queue_params(struct hostapd_iface *iface)
  {
  	struct hostapd_data *hapd = iface->bss[0];
  	int i;
  	struct hostapd_tx_queue_params *p;
  
  #ifdef CONFIG_MESH
  	if (iface->mconf == NULL)
  		return;
  #endif /* CONFIG_MESH */
  
  	for (i = 0; i < NUM_TX_QUEUES; i++) {
  		p = &iface->conf->tx_queue[i];
  
  		if (hostapd_set_tx_queue_params(hapd, i, p->aifs, p->cwmin,
  						p->cwmax, p->burst)) {
  			wpa_printf(MSG_DEBUG, "Failed to set TX queue "
  				   "parameters for queue %d.", i);
  			/* Continue anyway */
  		}
  	}
  }
  
  #ifdef CONFIG_FULL_HOSTAPD
  
  static int hostapd_set_acl_list(struct hostapd_data *hapd,
  				struct mac_acl_entry *mac_acl,
  				int n_entries, u8 accept_acl)
  {
  	struct hostapd_acl_params *acl_params;
  	int i, err;
  
  	acl_params = os_zalloc(sizeof(*acl_params) +
  			       (n_entries * sizeof(acl_params->mac_acl[0])));
  	if (!acl_params)
  		return -ERRNOMEM;
  
  	for (i = 0; i < n_entries; i++)
  		os_memcpy(acl_params->mac_acl[i].addr, mac_acl[i].addr,
  			  ETH_ALEN);
  
  	acl_params->acl_policy = accept_acl;
  	acl_params->num_mac_acl = n_entries;
  
  	err = hostapd_drv_set_acl(hapd, acl_params);
  
  	os_free(acl_params);
  
  	return err;
  }
  
  
  static void hostapd_set_acl(struct hostapd_data *hapd)
  {
  	struct hostapd_config *conf = hapd->iconf;
  	int err;
  	u8 accept_acl;
  
  	if (hapd->iface->drv_max_acl_mac_addrs == 0)
  		return;
  
  	if (conf->bss[0]->macaddr_acl == DENY_UNLESS_ACCEPTED) {
  		accept_acl = 1;
  		err = hostapd_set_acl_list(hapd, conf->bss[0]->accept_mac,
  					   conf->bss[0]->num_accept_mac,
  					   accept_acl);
  		if (err) {
  			wpa_printf(MSG_DEBUG, "Failed to set accept acl");
  			return;
  		}
  	} else if (conf->bss[0]->macaddr_acl == ACCEPT_UNLESS_DENIED) {
  		accept_acl = 0;
  		err = hostapd_set_acl_list(hapd, conf->bss[0]->deny_mac,
  					   conf->bss[0]->num_deny_mac,
  					   accept_acl);
  		if (err) {
  			wpa_printf(MSG_DEBUG, "Failed to set deny acl");
  			return;
  		}
  	}
  }
  #endif
  
  static int start_ctrl_iface_bss(struct hostapd_data *hapd)
  {
  	if (!hapd->iface->interfaces ||
  	    !hapd->iface->interfaces->ctrl_iface_init)
  		return 0;
  
  	if (hapd->iface->interfaces->ctrl_iface_init(hapd)) {
  		wpa_printf(MSG_ERROR,
  			   "Failed to setup control interface for %s",
  			   hapd->conf->iface);
  		return -1;
  	}
  
  	return 0;
  }
  
  
  static int start_ctrl_iface(struct hostapd_iface *iface)
  {
  	size_t i;
  
  	if (!iface->interfaces || !iface->interfaces->ctrl_iface_init)
  		return 0;
  
  	for (i = 0; i < iface->num_bss; i++) {
  		struct hostapd_data *hapd = iface->bss[i];
  		if (iface->interfaces->ctrl_iface_init(hapd)) {
  			wpa_printf(MSG_ERROR,
  				   "Failed to setup control interface for %s",
  				   hapd->conf->iface);
  			return -1;
  		}
  	}
  
  	return 0;
  }
  
  
  static void channel_list_update_timeout(void *eloop_ctx, void *timeout_ctx)
  {
  	struct hostapd_iface *iface = eloop_ctx;
  
  	if (!iface->wait_channel_update) {
  		wpa_printf(MSG_INFO, "Channel list update timeout, but interface was not waiting for it");
  		return;
  	}
  
  	/*
  	 * It is possible that the existing channel list is acceptable, so try
  	 * to proceed.
  	 */
  	wpa_printf(MSG_DEBUG, "Channel list update timeout - try to continue anyway");
  	setup_interface2(iface);
  }
  
  
  void hostapd_channel_list_updated(struct hostapd_iface *iface, int initiator)
  {
  	if (!iface->wait_channel_update || initiator != REGDOM_SET_BY_USER)
  		return;
  
  	wpa_printf(MSG_DEBUG, "Channel list updated - continue setup");
  	eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
  	setup_interface2(iface);
  }
  
  
  static int setup_interface(struct hostapd_iface *iface)
  {
  	struct hostapd_data *hapd = iface->bss[0];
  	size_t i;
  
  	/*
  	 * It is possible that setup_interface() is called after the interface
  	 * was disabled etc., in which case driver_ap_teardown is possibly set
  	 * to 1. Clear it here so any other key/station deletion, which is not
  	 * part of a teardown flow, would also call the relevant driver
  	 * callbacks.
  	 */
  	iface->driver_ap_teardown = 0;
  
  	if (!iface->phy[0]) {
  		const char *phy = hostapd_drv_get_radio_name(hapd);
  		if (phy) {
  			wpa_printf(MSG_DEBUG, "phy: %s", phy);
  			os_strlcpy(iface->phy, phy, sizeof(iface->phy));
  		}
  	}
  
      //if (iface->num_bss != iface->conf->num_bss) {
      //    os_printf("%s num_bss=%d vs %d\n", __FUNCTION__, iface->num_bss, iface->conf->num_bss);
      //    return -1;
      //}
  
  	/*
  	 * Make sure that all BSSes get configured with a pointer to the same
  	 * driver interface.
  	 */
  	for (i = 1; i < iface->num_bss; i++) {
  		iface->bss[i]->driver = hapd->driver;
  		iface->bss[i]->drv_priv = hapd->drv_priv;
  	}
  
  	if (hostapd_validate_bssid_configuration(iface))
  		return -1;
  
  	/*
  	 * Initialize control interfaces early to allow external monitoring of
  	 * channel setup operations that may take considerable amount of time
  	 * especially for DFS cases.
  	 */
  	if (start_ctrl_iface(iface))
  		return -1;
  
  	if (hapd->iconf->country[0] && hapd->iconf->country[1]) {
  		char country[4], previous_country[4];
  
  		hostapd_set_state(iface, HAPD_IFACE_COUNTRY_UPDATE);
  		if (hostapd_get_country(hapd, previous_country) < 0)
  			previous_country[0] = '\0';
  
  		os_memcpy(country, hapd->iconf->country, 3);
  		country[3] = '\0';
  		if (hostapd_set_country(hapd, country) < 0) {
  			wpa_printf(MSG_ERROR, "Failed to set country code");
  			return -1;
  		}
  
  		wpa_printf(MSG_DEBUG, "Previous country code %s, new country code %s",
  			   previous_country, country);
  
  		if (os_strncmp(previous_country, country, 2) != 0) {
  			wpa_printf(MSG_DEBUG, "Continue interface setup after channel list update");
  			iface->wait_channel_update = 1;
  			eloop_register_timeout(5, 0,
  					       channel_list_update_timeout,
  					       iface, NULL);
  			return 0;
  		}
  	}
  
  	return setup_interface2(iface);
  }
  
  
  static int setup_interface2(struct hostapd_iface *iface)
  {
  	iface->wait_channel_update = 0;
  
  	if (hostapd_get_hw_features(iface)) {
  		/* Not all drivers support this yet, so continue without hw
  		 * feature data. */
  	} else {
  		int ret = hostapd_select_hw_mode(iface);
  		if (ret < 0) {
  			wpa_printf(MSG_ERROR, "Could not select hw_mode and "
  				   "channel. (%d)", ret);
  			goto fail;
  		}
  		if (ret == 1) {
  			wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback (ACS)");
  			return 0;
  		}
  		ret = hostapd_check_ht_capab(iface);
  		if (ret < 0)
  			goto fail;
  		if (ret == 1) {
  			wpa_printf(MSG_DEBUG, "Interface initialization will "
  				   "be completed in a callback");
  			return 0;
  		}
  
  		if (iface->conf->ieee80211h)
  			wpa_printf(MSG_DEBUG, "DFS support is enabled");
  	}
  	return hostapd_setup_interface_complete(iface, 0);
  
  fail:
  	hostapd_set_state(iface, HAPD_IFACE_DISABLED);
  	wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
  	if (iface->interfaces && iface->interfaces->terminate_on_error)
  		eloop_terminate();
  	return -1;
  }
  
  
  /**
   * hostapd_setup_interface_complete - Complete interface setup
   *
   * This function is called when previous steps in the interface setup has been
   * completed. This can also start operations, e.g., DFS, that will require
   * additional processing before interface is ready to be enabled. Such
   * operations will call this function from eloop callbacks when finished.
   */
  static int hostapd_setup_interface_complete_sync(struct hostapd_iface *iface,
  						 int err)
  {
  	struct hostapd_data *hapd = iface->bss[0];
  	size_t j;
  	u8 *prev_addr;
  	int delay_apply_cfg = 0;
  	int res_dfs_offload = 0;
  
  	if (err)
  		goto fail;
  
  	wpa_printf(MSG_DEBUG, "Completing interface initialization");
  	if (iface->conf->channel) {
  #ifdef NEED_AP_MLME
  		int res;
  #endif /* NEED_AP_MLME */
  
  		iface->freq = hostapd_hw_get_freq(hapd, iface->conf->channel);
  		wpa_printf(MSG_DEBUG, "Mode: %s  Channel: %d  "
  			   "Frequency: %d MHz",
  			   hostapd_hw_mode_txt(iface->conf->hw_mode),
  			   iface->conf->channel, iface->freq);
  
  #ifdef NEED_AP_MLME
  		/* Handle DFS only if it is not offloaded to the driver */
  		#if 1 // wangzhilei0
  		iface->drv_flags |= WPA_DRIVER_FLAGS_DFS_OFFLOAD;
  		#endif
  #ifdef CONFIG_DFS
  		if (!(iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD)) {
  			/* Check DFS */
  			res = hostapd_handle_dfs(iface);
  			if (res <= 0) {
  				if (res < 0)
  					goto fail;
  				return res;
  			}
  		} else {
  			/* If DFS is offloaded to the driver */
  			res_dfs_offload = hostapd_handle_dfs_offload(iface);
  			if (res_dfs_offload <= 0) {
  				if (res_dfs_offload < 0)
  					goto fail;
  			} else {
  				wpa_printf(MSG_DEBUG,
  					   "Proceed with AP/channel setup");
  				/*
  				 * If this is a DFS channel, move to completing
  				 * AP setup.
  				 */
  				if (res_dfs_offload == 1)
  					goto dfs_offload;
  				/* Otherwise fall through. */
  			}
  		}
  #endif
  #endif /* NEED_AP_MLME */
  
  #ifdef CONFIG_MESH
  		if (iface->mconf != NULL) {
  			wpa_printf(MSG_DEBUG,
  				   "%s: Mesh configuration will be applied while joining the mesh network",
  				   iface->bss[0]->conf->iface);
  			delay_apply_cfg = 1;
  		}
  #endif /* CONFIG_MESH */
  
  		if (!delay_apply_cfg &&
  		    hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
  				     hapd->iconf->channel,
  				     hapd->iconf->ieee80211n,
  				     hapd->iconf->ieee80211ac,
  				     hapd->iconf->secondary_channel,
  				     hapd->iconf->vht_oper_chwidth,
  				     hapd->iconf->vht_oper_centr_freq_seg0_idx,
  				     hapd->iconf->vht_oper_centr_freq_seg1_idx)) {
  			wpa_printf(MSG_ERROR, "Could not set channel for "
  				   "kernel driver");
  			goto fail;
  		}
  	}
  
  	if (iface->current_mode) {
  		if (hostapd_prepare_rates(iface, iface->current_mode)) {
  			wpa_printf(MSG_ERROR, "Failed to prepare rates "
  				   "table.");
  			hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
  				       HOSTAPD_LEVEL_WARNING,
  				       "Failed to prepare rates table.");
  			goto fail;
  		}
  	}
  
  	if (hapd->iconf->rts_threshold > -1 &&
  	    hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
  		wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
  			   "kernel driver");
  		goto fail;
  	}
  
  	if (hapd->iconf->fragm_threshold > -1 &&
  	    hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
  		wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
  			   "for kernel driver");
  		goto fail;
  	}
  
  	prev_addr = hapd->own_addr;
  
  	for (j = 0; j < iface->num_bss; j++) {
  		hapd = iface->bss[j];
  		if (j)
  			os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
  		if (hostapd_setup_bss(hapd, j == 0)) {
  			do {
  				hapd = iface->bss[j];
  				hostapd_bss_deinit_no_free(hapd);
  				hostapd_free_hapd_data(hapd);
  			} while (j-- > 0);
  			goto fail;
  		}
  		if (is_zero_ether_addr(hapd->conf->bssid))
  			prev_addr = hapd->own_addr;
  	}
  	hapd = iface->bss[0];
  
  	hostapd_tx_queue_params(iface);
  
  	ap_list_init(iface);
  
  #ifdef CONFIG_FULL_HOSTAPD
  	hostapd_set_acl(hapd);
  #endif
  	if (hostapd_driver_commit(hapd) < 0) {
  		wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
  			   "configuration", __func__);
  		goto fail;
  	}
  
  	/*
  	 * WPS UPnP module can be initialized only when the "upnp_iface" is up.
  	 * If "interface" and "upnp_iface" are the same (e.g., non-bridge
  	 * mode), the interface is up only after driver_commit, so initialize
  	 * WPS after driver_commit.
  	 */
  	for (j = 0; j < iface->num_bss; j++) {
  		if (hostapd_init_wps_complete(iface->bss[j]))
  			goto fail;
  	}
  
  	if ((iface->drv_flags & WPA_DRIVER_FLAGS_DFS_OFFLOAD) &&
  	    !res_dfs_offload) {
  		/*
  		 * If freq is DFS, and DFS is offloaded to the driver, then wait
  		 * for CAC to complete.
  		 */
  		wpa_printf(MSG_DEBUG, "%s: Wait for CAC to complete", __func__);
  		return res_dfs_offload;
  	}
  
  #ifdef NEED_AP_MLME
  #ifdef CONFIG_DFS
  dfs_offload:
  #endif
  #endif /* NEED_AP_MLME */
  
  #ifdef CONFIG_FST
  	if (hapd->iconf->fst_cfg.group_id[0]) {
  		struct fst_wpa_obj iface_obj;
  
  		fst_hostapd_fill_iface_obj(hapd, &iface_obj);
  		iface->fst = fst_attach(hapd->conf->iface, hapd->own_addr,
  					&iface_obj, &hapd->iconf->fst_cfg);
  		if (!iface->fst) {
  			wpa_printf(MSG_ERROR, "Could not attach to FST %s",
  				   hapd->iconf->fst_cfg.group_id);
  			goto fail;
  		}
  	}
  #endif /* CONFIG_FST */
  
  	hostapd_set_state(iface, HAPD_IFACE_ENABLED);
  	wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_ENABLED);
  	if (hapd->setup_complete_cb)
  		hapd->setup_complete_cb(hapd->setup_complete_cb_ctx);
  
  	wpa_printf(MSG_DEBUG, "Setup of interface done.");
  	if (iface->interfaces && iface->interfaces->terminate_on_error > 0)
  		iface->interfaces->terminate_on_error--;
  
  #ifdef CONFIG_FULL_HOSTAPD
  	for (j = 0; j < iface->num_bss; j++)
  		hostapd_set_own_neighbor_report(iface->bss[j]);
  #endif
  
  	return 0;
  
  fail:
  	wpa_printf(MSG_ERROR, "Interface initialization failed");
  	hostapd_set_state(iface, HAPD_IFACE_DISABLED);
  	wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
  #ifdef CONFIG_FST
  	if (iface->fst) {
  		fst_detach(iface->fst);
  		iface->fst = NULL;
  	}
  #endif /* CONFIG_FST */
  	if (iface->interfaces && iface->interfaces->terminate_on_error)
  		eloop_terminate();
  	return -1;
  }
  
  
  /**
   * hostapd_setup_interface_complete - Complete interface setup
   *
   * This function is called when previous steps in the interface setup has been
   * completed. This can also start operations, e.g., DFS, that will require
   * additional processing before interface is ready to be enabled. Such
   * operations will call this function from eloop callbacks when finished.
   */
  int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
  {
  	struct hapd_interfaces *interfaces = iface->interfaces;
  	struct hostapd_data *hapd = iface->bss[0];
  	unsigned int i;
  	int not_ready_in_sync_ifaces = 0;
  
  	if (!iface->need_to_start_in_sync)
  		return hostapd_setup_interface_complete_sync(iface, err);
  
  	if (err) {
  		wpa_printf(MSG_ERROR, "Interface initialization failed");
  		hostapd_set_state(iface, HAPD_IFACE_DISABLED);
  		iface->need_to_start_in_sync = 0;
  		wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
  		if (interfaces && interfaces->terminate_on_error)
  			eloop_terminate();
  		return -1;
  	}
  
  	if (iface->ready_to_start_in_sync) {
  		/* Already in ready and waiting. should never happpen */
  		return 0;
  	}
  
  	for (i = 0; i < interfaces->count; i++) {
  		if (interfaces->iface[i]->need_to_start_in_sync &&
  		    !interfaces->iface[i]->ready_to_start_in_sync)
  			not_ready_in_sync_ifaces++;
  	}
  
  	/*
  	 * Check if this is the last interface, if yes then start all the other
  	 * waiting interfaces. If not, add this interface to the waiting list.
  	 */
  	if (not_ready_in_sync_ifaces > 1 && iface->state == HAPD_IFACE_DFS) {
  		/*
  		 * If this interface went through CAC, do not synchronize, just
  		 * start immediately.
  		 */
  		iface->need_to_start_in_sync = 0;
  		wpa_printf(MSG_INFO,
  			   "%s: Finished CAC - bypass sync and start interface",
  			   iface->bss[0]->conf->iface);
  		return hostapd_setup_interface_complete_sync(iface, err);
  	}
  
  	if (not_ready_in_sync_ifaces > 1) {
  		/* need to wait as there are other interfaces still coming up */
  		iface->ready_to_start_in_sync = 1;
  		wpa_printf(MSG_INFO,
  			   "%s: Interface waiting to sync with other interfaces",
  			   iface->bss[0]->conf->iface);
  		return 0;
  	}
  
  	wpa_printf(MSG_INFO,
  		   "%s: Last interface to sync - starting all interfaces",
  		   iface->bss[0]->conf->iface);
  	iface->need_to_start_in_sync = 0;
  	hostapd_setup_interface_complete_sync(iface, err);
  	for (i = 0; i < interfaces->count; i++) {
  		if (interfaces->iface[i]->need_to_start_in_sync &&
  		    interfaces->iface[i]->ready_to_start_in_sync) {
  			hostapd_setup_interface_complete_sync(
  				interfaces->iface[i], 0);
  			/* Only once the interfaces are sync started */
  			interfaces->iface[i]->need_to_start_in_sync = 0;
  		}
  	}
  
  	return 0;
  }
  
  
  /**
   * hostapd_setup_interface - Setup of an interface
   * @iface: Pointer to interface data.
   * Returns: 0 on success, -1 on failure
   *
   * Initializes the driver interface, validates the configuration,
   * and sets driver parameters based on the configuration.
   * Flushes old stations, sets the channel, encryption,
   * beacons, and WDS links based on the configuration.
   *
   * If interface setup requires more time, e.g., to perform HT co-ex scans, ACS,
   * or DFS operations, this function returns 0 before such operations have been
   * completed. The pending operations are registered into eloop and will be
   * completed from eloop callbacks. Those callbacks end up calling
   * hostapd_setup_interface_complete() once setup has been completed.
   */
  int hostapd_setup_interface(struct hostapd_iface *iface)
  {
  	int ret;
  
  	ret = setup_interface(iface);
  	if (ret) {
  		wpa_printf(MSG_ERROR, "%s: Unable to setup interface.",
  			   iface->bss[0]->conf->iface);
  		return -1;
  	}
  
  	return 0;
  }
  
  /**
   * hostapd_alloc_bss_data - Allocate and initialize per-BSS data
   * @hapd_iface: Pointer to interface data
   * @conf: Pointer to per-interface configuration
   * @bss: Pointer to per-BSS configuration for this BSS
   * Returns: Pointer to allocated BSS data
   *
   * This function is used to allocate per-BSS data structure. This data will be
   * freed after hostapd_cleanup() is called for it during interface
   * deinitialization.
   */
  struct hostapd_data *
  hostapd_alloc_bss_data(struct hostapd_iface *hapd_iface,
  		       struct hostapd_config *conf,
  		       struct hostapd_bss_config *bss)
  {
  	struct hostapd_data *hapd;
  
  	hapd = os_zalloc(sizeof(*hapd));
  	if (hapd == NULL)
  		return NULL;
  
  	hapd->new_assoc_sta_cb = hostapd_new_assoc_sta;
  	hapd->iconf = conf;
  	hapd->conf = bss;
  	hapd->iface = hapd_iface;
  	hapd->driver = hapd->iconf->driver;
  
  	return hapd;
  }
  
  
  static void hostapd_bss_deinit(struct hostapd_data *hapd)
  {
  	if (!hapd)
  		return;
  	wpa_printf(MSG_DEBUG, "%s: deinit bss %s", __func__,
  		   hapd->conf->iface);
  	hostapd_bss_deinit_no_free(hapd);
  	wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
  	hostapd_cleanup(hapd);
  }
  
  
  void hostapd_interface_deinit(struct hostapd_iface *iface)
  {
  	int j;
  
  	wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
  	if (iface == NULL)
  		return;
  
  	hostapd_set_state(iface, HAPD_IFACE_DISABLED);
  
  #ifdef CONFIG_IEEE80211N
  #ifdef NEED_AP_MLME
  	hostapd_stop_setup_timers(iface);
  	eloop_cancel_timeout(ap_ht2040_timeout, iface, NULL);
  #endif /* NEED_AP_MLME */
  #endif /* CONFIG_IEEE80211N */
  	eloop_cancel_timeout(channel_list_update_timeout, iface, NULL);
  	iface->wait_channel_update = 0;
  
  #ifdef CONFIG_FST
  	if (iface->fst) {
  		fst_detach(iface->fst);
  		iface->fst = NULL;
  	}
  #endif /* CONFIG_FST */
  
  	for (j = iface->num_bss - 1; j >= 0; j--) {
  		if (!iface->bss)
  			break;
  		hostapd_bss_deinit(iface->bss[j]);
  	}
  }
  
  
  void hostapd_interface_free(struct hostapd_iface *iface)
  {
  	size_t j;
  	wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
  	for (j = 0; j < iface->num_bss; j++) {
  		if (!iface->bss)
  			break;
  		wpa_printf(MSG_DEBUG, "%s: free hapd %p",
  			   __func__, iface->bss[j]);
  		os_free(iface->bss[j]);
  	}
  	hostapd_cleanup_iface(iface);
  }
  
  
  struct hostapd_iface * hostapd_alloc_iface(void)
  {
  	struct hostapd_iface *hapd_iface;
  
  	hapd_iface = os_zalloc(sizeof(*hapd_iface));
  	if (!hapd_iface)
  		return NULL;
  
  	dl_list_init(&hapd_iface->sta_seen);
  
  	return hapd_iface;
  }
  
  
  /**
   * hostapd_init - Allocate and initialize per-interface data
   * @config_file: Path to the configuration file
   * Returns: Pointer to the allocated interface data or %NULL on failure
   *
   * This function is used to allocate main data structures for per-interface
   * data. The allocated data buffer will be freed by calling
   * hostapd_cleanup_iface().
   */
  struct hostapd_iface * hostapd_init(struct hapd_interfaces *interfaces,
  				    const char *config_file)
  {
  	struct hostapd_iface *hapd_iface = NULL;
  	struct hostapd_config *conf = NULL;
  	struct hostapd_data *hapd;
  	size_t i;
  
  	hapd_iface = hostapd_alloc_iface();
  	if (hapd_iface == NULL)
  		goto fail;
  
  	hapd_iface->config_fname = os_strdup(config_file);
  	if (hapd_iface->config_fname == NULL)
  		goto fail;
  
  	conf = interfaces->config_read_cb(hapd_iface->config_fname);	//hostapd_config_read
  	if (conf == NULL)
  		goto fail;
  	hapd_iface->conf = conf;
  
  	hapd_iface->num_bss = conf->num_bss;
  	hapd_iface->bss = os_calloc(conf->num_bss,
  				    sizeof(struct hostapd_data *));
  	if (hapd_iface->bss == NULL)
  		goto fail;
  
  	for (i = 0; i < conf->num_bss; i++) {
  		hapd = hapd_iface->bss[i] =
  			hostapd_alloc_bss_data(hapd_iface, conf,
  					       conf->bss[i]);
  		if (hapd == NULL)
  			goto fail;
  		hapd->msg_ctx = hapd;
  	}
  
  	return hapd_iface;
  
  fail:
  	wpa_printf(MSG_ERROR, "Failed to set up interface with %s",
  		   config_file);
  	if (conf)
  		hostapd_config_free(conf);
  	if (hapd_iface) {
  		os_free(hapd_iface->config_fname);
  		os_free(hapd_iface->bss);
  		wpa_printf(MSG_DEBUG, "%s: free iface %p",
  			   __func__, hapd_iface);
  		os_free(hapd_iface);
  	}
  	return NULL;
  }
  
  
  static int ifname_in_use(struct hapd_interfaces *interfaces, const char *ifname)
  {
  	size_t i, j;
  
  	for (i = 0; i < interfaces->count; i++) {
  		struct hostapd_iface *iface = interfaces->iface[i];
  		for (j = 0; j < iface->num_bss; j++) {
  			struct hostapd_data *hapd = iface->bss[j];
  			if (os_strcmp(ifname, hapd->conf->iface) == 0)
  				return 1;
  		}
  	}
  
  	return 0;
  }
  
  
  /**
   * hostapd_interface_init_bss - Read configuration file and init BSS data
   *
   * This function is used to parse configuration file for a BSS. This BSS is
   * added to an existing interface sharing the same radio (if any) or a new
   * interface is created if this is the first interface on a radio. This
   * allocate memory for the BSS. No actual driver operations are started.
   *
   * This is similar to hostapd_interface_init(), but for a case where the
   * configuration is used to add a single BSS instead of all BSSes for a radio.
   */
  struct hostapd_iface *
  hostapd_interface_init_bss(struct hapd_interfaces *interfaces, const char *phy,
  			   const char *config_fname, int debug)
  {
  	struct hostapd_iface *new_iface = NULL, *iface = NULL;
  	struct hostapd_data *hapd;
  	int k;
  	size_t i, bss_idx;
  
  	if (!phy || !*phy)
  		return NULL;
  
  	for (i = 0; i < interfaces->count; i++) {
  		if (os_strcmp(interfaces->iface[i]->phy, phy) == 0) {
  			iface = interfaces->iface[i];
  			break;
  		}
  	}
  
  	wpa_printf(MSG_INFO, "Configuration file: %s (phy %s)%s",
  		   config_fname, phy, iface ? "" : " --> new PHY");
  	if (iface) {
  		struct hostapd_config *conf;
  		struct hostapd_bss_config **tmp_conf;
  		struct hostapd_data **tmp_bss;
  		struct hostapd_bss_config *bss;
  		const char *ifname;
  
  		/* Add new BSS to existing iface */
  		conf = interfaces->config_read_cb(config_fname);
  		if (conf == NULL)
  			return NULL;
  		if (conf->num_bss > 1) {
  			wpa_printf(MSG_ERROR, "Multiple BSSes specified in BSS-config");
  			hostapd_config_free(conf);
  			return NULL;
  		}
  
  		ifname = conf->bss[0]->iface;
  		if (ifname[0] != '\0' && ifname_in_use(interfaces, ifname)) {
  			wpa_printf(MSG_ERROR,
  				   "Interface name %s already in use", ifname);
  			hostapd_config_free(conf);
  			return NULL;
  		}
  
  		tmp_conf = os_realloc_array(
  			iface->conf->bss, iface->conf->num_bss + 1,
  			sizeof(struct hostapd_bss_config *));
  		tmp_bss = os_realloc_array(iface->bss, iface->num_bss + 1,
  					   sizeof(struct hostapd_data *));
  		if (tmp_bss)
  			iface->bss = tmp_bss;
  		if (tmp_conf) {
  			iface->conf->bss = tmp_conf;
  			iface->conf->last_bss = tmp_conf[0];
  		}
  		if (tmp_bss == NULL || tmp_conf == NULL) {
  			hostapd_config_free(conf);
  			return NULL;
  		}
  		bss = iface->conf->bss[iface->conf->num_bss] = conf->bss[0];
  		iface->conf->num_bss++;
  
  		hapd = hostapd_alloc_bss_data(iface, iface->conf, bss);
  		if (hapd == NULL) {
  			iface->conf->num_bss--;
  			hostapd_config_free(conf);
  			return NULL;
  		}
  		iface->conf->last_bss = bss;
  		iface->bss[iface->num_bss] = hapd;
  		hapd->msg_ctx = hapd;
  
  		bss_idx = iface->num_bss++;
  		conf->num_bss--;
  		conf->bss[0] = NULL;
  		hostapd_config_free(conf);
  	} else {
  		/* Add a new iface with the first BSS */
  		new_iface = iface = hostapd_init(interfaces, config_fname);
  		if (!iface)
  			return NULL;
  		os_strlcpy(iface->phy, phy, sizeof(iface->phy));
  		iface->interfaces = interfaces;
  		bss_idx = 0;
  	}
  
  	for (k = 0; k < debug; k++) {
  		if (iface->bss[bss_idx]->conf->logger_stdout_level > 0)
  			iface->bss[bss_idx]->conf->logger_stdout_level--;
  	}
  
  	if (iface->conf->bss[bss_idx]->iface[0] == '\0' &&
  	    !hostapd_drv_none(iface->bss[bss_idx])) {
  		wpa_printf(MSG_ERROR, "Interface name not specified in %s",
  			   config_fname);
  		if (new_iface)
  			hostapd_interface_deinit_free(new_iface);
  		return NULL;
  	}
  
  	return iface;
  }
  
  
  void hostapd_interface_deinit_free(struct hostapd_iface *iface)
  {
  	const struct wpa_driver_ops *driver;
  	void *drv_priv;
  
  	wpa_printf(MSG_DEBUG, "%s(%p)", __func__, iface);
  	if (iface == NULL)
  		return;
  	wpa_printf(MSG_DEBUG, "%s: num_bss=%u conf->num_bss=%u",
  		   __func__, (unsigned int) iface->num_bss,
  		   (unsigned int) iface->conf->num_bss);
  	driver = iface->bss[0]->driver;
  	drv_priv = iface->bss[0]->drv_priv;
  	hostapd_interface_deinit(iface);
  	wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
  		   __func__, driver, drv_priv);
  	if (driver && driver->hapd_deinit && drv_priv) {
  		driver->hapd_deinit(drv_priv);
  		iface->bss[0]->drv_priv = NULL;
  	}
  	hostapd_interface_free(iface);
  }
  
  
  static void hostapd_deinit_driver(const struct wpa_driver_ops *driver,
  				  void *drv_priv,
  				  struct hostapd_iface *hapd_iface)
  {
  	size_t j;
  
  	wpa_printf(MSG_DEBUG, "%s: driver=%p drv_priv=%p -> hapd_deinit",
  		   __func__, driver, drv_priv);
  	if (driver && driver->hapd_deinit && drv_priv) {
  		driver->hapd_deinit(drv_priv);
  		for (j = 0; j < hapd_iface->num_bss; j++) {
  			wpa_printf(MSG_DEBUG, "%s:bss[%d]->drv_priv=%p",
  				   __func__, (int) j,
  				   hapd_iface->bss[j]->drv_priv);
  			if (hapd_iface->bss[j]->drv_priv == drv_priv)
  				hapd_iface->bss[j]->drv_priv = NULL;
  		}
  	}
  }
  
  
  int hostapd_enable_iface(struct hostapd_iface *hapd_iface)
  {
  	size_t j;
  
  	if (hapd_iface->bss[0]->drv_priv != NULL) {
  		wpa_printf(MSG_ERROR, "Interface %s already enabled",
  			   hapd_iface->conf->bss[0]->iface);
  		return -1;
  	}
  
  	wpa_printf(MSG_DEBUG, "Enable interface %s",
  		   hapd_iface->conf->bss[0]->iface);
  
  	for (j = 0; j < hapd_iface->num_bss; j++)
  		hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
  	if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
  		wpa_printf(MSG_INFO, "Invalid configuration - cannot enable");
  		return -1;
  	}
  
  	if (hapd_iface->interfaces == NULL ||
  	    hapd_iface->interfaces->driver_init == NULL ||
  	    hapd_iface->interfaces->driver_init(hapd_iface))
  		return -1;
  
  	if (hostapd_setup_interface(hapd_iface)) {
  		hostapd_deinit_driver(hapd_iface->bss[0]->driver,
  				      hapd_iface->bss[0]->drv_priv,
  				      hapd_iface);
  		return -1;
  	}
  
  	return 0;
  }
  
  
  int hostapd_reload_iface(struct hostapd_iface *hapd_iface)
  {
  	size_t j;
  
  	wpa_printf(MSG_DEBUG, "Reload interface %s",
  		   hapd_iface->conf->bss[0]->iface);
  	for (j = 0; j < hapd_iface->num_bss; j++)
  		hostapd_set_security_params(hapd_iface->conf->bss[j], 1);
  	if (hostapd_config_check(hapd_iface->conf, 1) < 0) {
  		wpa_printf(MSG_ERROR, "Updated configuration is invalid");
  		return -1;
  	}
  	hostapd_clear_old(hapd_iface);
  	for (j = 0; j < hapd_iface->num_bss; j++)
  		hostapd_reload_bss(hapd_iface->bss[j]);
  
  	return 0;
  }
  
  
  int hostapd_disable_iface(struct hostapd_iface *hapd_iface)
  {
  	size_t j;
  	const struct wpa_driver_ops *driver;
  	void *drv_priv;
  
  	if (hapd_iface == NULL)
  		return -1;
  
  	if (hapd_iface->bss[0]->drv_priv == NULL) {
  		wpa_printf(MSG_INFO, "Interface %s already disabled",
  			   hapd_iface->conf->bss[0]->iface);
  		return -1;
  	}
  
  	wpa_msg(hapd_iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
  	driver = hapd_iface->bss[0]->driver;
  	drv_priv = hapd_iface->bss[0]->drv_priv;
  
  	hapd_iface->driver_ap_teardown =
  		!!(hapd_iface->drv_flags &
  		   WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
  
  	/* same as hostapd_interface_deinit without deinitializing ctrl-iface */
  	for (j = 0; j < hapd_iface->num_bss; j++) {
  		struct hostapd_data *hapd = hapd_iface->bss[j];
  		hostapd_bss_deinit_no_free(hapd);
  		hostapd_free_hapd_data(hapd);
  	}
  
  	hostapd_deinit_driver(driver, drv_priv, hapd_iface);
  
  	/* From hostapd_cleanup_iface: These were initialized in
  	 * hostapd_setup_interface and hostapd_setup_interface_complete
  	 */
  	hostapd_cleanup_iface_partial(hapd_iface);
  
  	wpa_printf(MSG_DEBUG, "Interface %s disabled",
  		   hapd_iface->bss[0]->conf->iface);
  	hostapd_set_state(hapd_iface, HAPD_IFACE_DISABLED);
  	return 0;
  }
  
  
  static struct hostapd_iface *
  hostapd_iface_alloc(struct hapd_interfaces *interfaces)
  {
  	struct hostapd_iface **iface, *hapd_iface;
  
  	iface = os_realloc_array(interfaces->iface, interfaces->count + 1,
  				 sizeof(struct hostapd_iface *));
  	if (iface == NULL)
  		return NULL;
  	interfaces->iface = iface;
  	hapd_iface = interfaces->iface[interfaces->count] =
  		hostapd_alloc_iface();
  	if (hapd_iface == NULL) {
  		wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
  			   "the interface", __func__);
  		return NULL;
  	}
  	interfaces->count++;
  	hapd_iface->interfaces = interfaces;
  
  	return hapd_iface;
  }
  
  
  static struct hostapd_config *
  hostapd_config_alloc(struct hapd_interfaces *interfaces, const char *ifname,
  		     const char *ctrl_iface, const char *driver)
  {
  	struct hostapd_bss_config *bss;
  	struct hostapd_config *conf;
  
  	/* Allocates memory for bss and conf */
  	conf = hostapd_config_defaults();
  	if (conf == NULL) {
  		 wpa_printf(MSG_ERROR, "%s: Failed to allocate memory for "
  				"configuration", __func__);
  		return NULL;
  	}
  
  	if (driver) {
  		int j;
  
  		for (j = 0; wpa_drivers[j]; j++) {
  			if (os_strcmp(driver, wpa_drivers[j]->name) == 0) {
  				conf->driver = wpa_drivers[j];
  				goto skip;
  			}
  		}
  
  		wpa_printf(MSG_ERROR,
  			   "Invalid/unknown driver '%s' - registering the default driver",
  			   driver);
  	}
  
  	conf->driver = wpa_drivers[0];
  	if (conf->driver == NULL) {
  		wpa_printf(MSG_ERROR, "No driver wrappers registered!");
  		hostapd_config_free(conf);
  		return NULL;
  	}
  
  skip:
  	bss = conf->last_bss = conf->bss[0];
  
  	os_strlcpy(bss->iface, ifname, sizeof(bss->iface));
  	bss->ctrl_interface = os_strdup(ctrl_iface);
  	if (bss->ctrl_interface == NULL) {
  		hostapd_config_free(conf);
  		return NULL;
  	}
  
  	/* Reading configuration file skipped, will be done in SET!
  	 * From reading the configuration till the end has to be done in
  	 * SET
  	 */
  	return conf;
  }
  
  
  static int hostapd_data_alloc(struct hostapd_iface *hapd_iface,
  			      struct hostapd_config *conf)
  {
  	size_t i;
  	struct hostapd_data *hapd;
  
  	hapd_iface->bss = os_calloc(conf->num_bss,
  				    sizeof(struct hostapd_data *));
  	if (hapd_iface->bss == NULL)
  		return -1;
  
  	for (i = 0; i < conf->num_bss; i++) {
  		hapd = hapd_iface->bss[i] =
  			hostapd_alloc_bss_data(hapd_iface, conf, conf->bss[i]);
  		if (hapd == NULL) {
  			while (i > 0) {
  				i--;
  				os_free(hapd_iface->bss[i]);
  				hapd_iface->bss[i] = NULL;
  			}
  			os_free(hapd_iface->bss);
  			hapd_iface->bss = NULL;
  			return -1;
  		}
  		hapd->msg_ctx = hapd;
  	}
  
  	hapd_iface->conf = conf;
  	hapd_iface->num_bss = conf->num_bss;
  
  	return 0;
  }
  
  
  int hostapd_add_iface(struct hapd_interfaces *interfaces, char *buf)
  {
  	struct hostapd_config *conf = NULL;
  	struct hostapd_iface *hapd_iface = NULL, *new_iface = NULL;
  	struct hostapd_data *hapd;
  	char *ptr;
  	size_t i, j;
  	const char *conf_file = NULL, *phy_name = NULL;
  
  	if (os_strncmp(buf, "bss_config=", 11) == 0) {
  		char *pos;
  		phy_name = buf + 11;
  		pos = os_strchr(phy_name, ':');
  		if (!pos)
  			return -1;
  		*pos++ = '\0';
  		conf_file = pos;
  		if (!os_strlen(conf_file))
  			return -1;
  
  		hapd_iface = hostapd_interface_init_bss(interfaces, phy_name,
  							conf_file, 0);
  		if (!hapd_iface)
  			return -1;
  
  		for (j = 0; j < interfaces->count; j++) {
  			if (interfaces->iface[j] == hapd_iface)
  				break;
  		}
  
  		if (j == interfaces->count) {
  			struct hostapd_iface **tmp;
  			tmp = os_realloc_array(interfaces->iface,
  					       interfaces->count + 1,
  					       sizeof(struct hostapd_iface *));
  			if (!tmp) {
  				hostapd_interface_deinit_free(hapd_iface);
  				return -1;
  			}
  			interfaces->iface = tmp;
  			interfaces->iface[interfaces->count++] = hapd_iface;
  			new_iface = hapd_iface;
  		}
  
  		if (new_iface) {
  			if (interfaces->driver_init(hapd_iface))	//hostapd_driver_init
  				goto fail;
  
  			if (hostapd_setup_interface(hapd_iface)) {
  				hostapd_deinit_driver(
  					hapd_iface->bss[0]->driver,
  					hapd_iface->bss[0]->drv_priv,
  					hapd_iface);
  				goto fail;
  			}
  		} else {
  			/* Assign new BSS with bss[0]'s driver info */
  			hapd = hapd_iface->bss[hapd_iface->num_bss - 1];
  			hapd->driver = hapd_iface->bss[0]->driver;
  			hapd->drv_priv = hapd_iface->bss[0]->drv_priv;
  			os_memcpy(hapd->own_addr, hapd_iface->bss[0]->own_addr,
  				  ETH_ALEN);
  
  			if (start_ctrl_iface_bss(hapd) < 0 ||
  			    (hapd_iface->state == HAPD_IFACE_ENABLED &&
  			     hostapd_setup_bss(hapd, -1))) {
  				hostapd_cleanup(hapd);
  				hapd_iface->bss[hapd_iface->num_bss - 1] = NULL;
  				hapd_iface->conf->num_bss--;
  				hapd_iface->num_bss--;
  				wpa_printf(MSG_DEBUG, "%s: free hapd %p %s",
  					   __func__, hapd, hapd->conf->iface);
  				hostapd_config_free_bss(hapd->conf);
  				hapd->conf = NULL;
  				os_free(hapd);
  				return -1;
  			}
  		}
  		return 0;
  	}
  
  	ptr = os_strchr(buf, ' ');
  	if (ptr == NULL)
  		return -1;
  	*ptr++ = '\0';
  
  	if (os_strncmp(ptr, "config=", 7) == 0)
  		conf_file = ptr + 7;
  
  	for (i = 0; i < interfaces->count; i++) {
  		if (!os_strcmp(interfaces->iface[i]->conf->bss[0]->iface,
  			       buf)) {
  			wpa_printf(MSG_INFO, "Cannot add interface - it "
  				   "already exists");
  			return -1;
  		}
  	}
  
  	hapd_iface = hostapd_iface_alloc(interfaces);
  	if (hapd_iface == NULL) {
  		wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
  			   "for interface", __func__);
  		goto fail;
  	}
  	new_iface = hapd_iface;
  
  	if (conf_file && interfaces->config_read_cb) {
  		conf = interfaces->config_read_cb(conf_file);
  		if (conf && conf->bss)
  			os_strlcpy(conf->bss[0]->iface, buf,
  				   sizeof(conf->bss[0]->iface));
  	} else {
  		char *driver = os_strchr(ptr, ' ');
  
  		if (driver)
  			*driver++ = '\0';
  		conf = hostapd_config_alloc(interfaces, buf, ptr, driver);
  	}
  
  	if (conf == NULL || conf->bss == NULL) {
  		wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
  			   "for configuration", __func__);
  		goto fail;
  	}
  
  	if (hostapd_data_alloc(hapd_iface, conf) < 0) {
  		wpa_printf(MSG_ERROR, "%s: Failed to allocate memory "
  			   "for hostapd", __func__);
  		goto fail;
  	}
  	conf = NULL;
  
  	if (start_ctrl_iface(hapd_iface) < 0)
  		goto fail;
  
  	wpa_printf(MSG_INFO, "Add interface '%s'",
  		   hapd_iface->conf->bss[0]->iface);
  
  	return 0;
  
  fail:
  	if (conf)
  		hostapd_config_free(conf);
  	if (hapd_iface) {
  		if (hapd_iface->bss) {
  			for (i = 0; i < hapd_iface->num_bss; i++) {
  				hapd = hapd_iface->bss[i];
  				if (!hapd)
  					continue;
  				if (hapd_iface->interfaces &&
  				    hapd_iface->interfaces->ctrl_iface_deinit)
  					hapd_iface->interfaces->
  						ctrl_iface_deinit(hapd);
  				wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
  					   __func__, hapd_iface->bss[i],
  					   hapd->conf->iface);
  				hostapd_cleanup(hapd);
  				os_free(hapd);
  				hapd_iface->bss[i] = NULL;
  			}
  			os_free(hapd_iface->bss);
  			hapd_iface->bss = NULL;
  		}
  		if (new_iface) {
  			interfaces->count--;
  			interfaces->iface[interfaces->count] = NULL;
  		}
  		hostapd_cleanup_iface(hapd_iface);
  	}
  	return -1;
  }
  
  
  static int hostapd_remove_bss(struct hostapd_iface *iface, unsigned int idx)
  {
  	size_t i;
  
  	wpa_printf(MSG_INFO, "Remove BSS '%s'", iface->conf->bss[idx]->iface);
  
  	/* Remove hostapd_data only if it has already been initialized */
  	if (idx < iface->num_bss) {
  		struct hostapd_data *hapd = iface->bss[idx];
  
  		hostapd_bss_deinit(hapd);
  		wpa_printf(MSG_DEBUG, "%s: free hapd %p (%s)",
  			   __func__, hapd, hapd->conf->iface);
  		hostapd_config_free_bss(hapd->conf);
  		hapd->conf = NULL;
  		os_free(hapd);
  
  		iface->num_bss--;
  
  		for (i = idx; i < iface->num_bss; i++)
  			iface->bss[i] = iface->bss[i + 1];
  	} else {
  		hostapd_config_free_bss(iface->conf->bss[idx]);
  		iface->conf->bss[idx] = NULL;
  	}
  
  	iface->conf->num_bss--;
  	for (i = idx; i < iface->conf->num_bss; i++)
  		iface->conf->bss[i] = iface->conf->bss[i + 1];
  
  	return 0;
  }
  
  
  int hostapd_remove_iface(struct hapd_interfaces *interfaces, char *buf)
  {
  	struct hostapd_iface *hapd_iface;
  	size_t i, j, k = 0;
  
  	for (i = 0; i < interfaces->count; i++) {
  		hapd_iface = interfaces->iface[i];
  		if (hapd_iface == NULL)
  			return -1;
  		if (!os_strcmp(hapd_iface->conf->bss[0]->iface, buf)) {
  			wpa_printf(MSG_INFO, "Remove interface '%s'", buf);
  			hapd_iface->driver_ap_teardown =
  				!!(hapd_iface->drv_flags &
  				   WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
  
  			hostapd_interface_deinit_free(hapd_iface);
  			k = i;
  			while (k < (interfaces->count - 1)) {
  				interfaces->iface[k] =
  					interfaces->iface[k + 1];
  				k++;
  			}
  			interfaces->count--;
  			return 0;
  		}
  
  		for (j = 0; j < hapd_iface->conf->num_bss; j++) {
  			if (!os_strcmp(hapd_iface->conf->bss[j]->iface, buf)) {
  				hapd_iface->driver_ap_teardown =
  					!(hapd_iface->drv_flags &
  					  WPA_DRIVER_FLAGS_AP_TEARDOWN_SUPPORT);
  				return hostapd_remove_bss(hapd_iface, j);
  			}
  		}
  	}
  	return -1;
  }
  
  
  /**
   * hostapd_new_assoc_sta - Notify that a new station associated with the AP
   * @hapd: Pointer to BSS data
   * @sta: Pointer to the associated STA data
   * @reassoc: 1 to indicate this was a re-association; 0 = first association
   *
   * This function will be called whenever a station associates with the AP. It
   * can be called from ieee802_11.c for drivers that export MLME to hostapd and
   * from drv_callbacks.c based on driver events for drivers that take care of
   * management frames (IEEE 802.11 authentication and association) internally.
   */
  void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
  			   int reassoc)
  {
  	if (hapd->tkip_countermeasures) {
  		hostapd_drv_sta_deauth(hapd, sta->addr,
  				       WLAN_REASON_MICHAEL_MIC_FAILURE);
  		return;
  	}
  
  	hostapd_prune_associations(hapd, sta->addr);
  	ap_sta_clear_disconnect_timeouts(hapd, sta);
  #ifdef CONFIG_FULL_HOSTAPD
  	/* IEEE 802.11F (IAPP) */
  	if (hapd->conf->ieee802_11f)
  		iapp_new_station(hapd->iapp, sta);
  #endif
  #ifdef CONFIG_P2P
  	if (sta->p2p_ie == NULL && !sta->no_p2p_set) {
  		sta->no_p2p_set = 1;
  		hapd->num_sta_no_p2p++;
  		if (hapd->num_sta_no_p2p == 1)
  			hostapd_p2p_non_p2p_sta_connected(hapd);
  	}
  #endif /* CONFIG_P2P */
  
  	/* Start accounting here, if IEEE 802.1X and WPA are not used.
  	 * IEEE 802.1X/WPA code will start accounting after the station has
  	 * been authorized. */
  	if (!hapd->conf->ieee802_1x && !hapd->conf->wpa && !hapd->conf->osen) {
  		ap_sta_set_authorized(hapd, sta, 1);
  		os_get_reltime(&sta->connected_time);
  		accounting_sta_start(hapd, sta);
  	}
  
  #ifdef IEEE8021X_EAPOL
  	/* Start IEEE 802.1X authentication process for new stations */
  	ieee802_1x_new_station(hapd, sta);
  #endif
  	if (reassoc) {
  		if (sta->auth_alg != WLAN_AUTH_FT &&
  		    !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
  			wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
  	} else
  		wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
  
  	if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)) {
  		wpa_printf(MSG_DEBUG, "%s: reschedule ap_handle_timer timeout "
  			   "for " MACSTR " (%d seconds - ap_max_inactivity)",
  			   __func__, MAC2STR(sta->addr),
  			   hapd->conf->ap_max_inactivity);
  		eloop_cancel_timeout(ap_handle_timer, hapd, sta);
  		eloop_register_timeout(hapd->conf->ap_max_inactivity, 0,
  				       ap_handle_timer, hapd, sta);
  	}
  }
  
  
  const char * hostapd_state_text(enum hostapd_iface_state s)
  {
  	switch (s) {
  	case HAPD_IFACE_UNINITIALIZED:
  		return "UNINITIALIZED";
  	case HAPD_IFACE_DISABLED:
  		return "DISABLED";
  	case HAPD_IFACE_COUNTRY_UPDATE:
  		return "COUNTRY_UPDATE";
  	case HAPD_IFACE_ACS:
  		return "ACS";
  	case HAPD_IFACE_HT_SCAN:
  		return "HT_SCAN";
  	case HAPD_IFACE_DFS:
  		return "DFS";
  	case HAPD_IFACE_ENABLED:
  		return "ENABLED";
  	}
  
  	return "UNKNOWN";
  }
  
  
  void hostapd_set_state(struct hostapd_iface *iface, enum hostapd_iface_state s)
  {
  	wpa_printf(MSG_INFO, "%s: interface state %s->%s",
  		   iface->conf->bss[0]->iface, hostapd_state_text(iface->state),
  		   hostapd_state_text(s));
  	iface->state = s;
  }
  
  
  int hostapd_csa_in_progress(struct hostapd_iface *iface)
  {
  	unsigned int i;
  
  	for (i = 0; i < iface->num_bss; i++)
  		if (iface->bss[i]->csa_in_progress)
  			return 1;
  	return 0;
  }
  
  
  #ifdef NEED_AP_MLME
  static void free_beacon_data(struct beacon_data *beacon)
  {
  	os_free(beacon->head);
  	beacon->head = NULL;
  	os_free(beacon->tail);
  	beacon->tail = NULL;
  	os_free(beacon->probe_resp);
  	beacon->probe_resp = NULL;
  	os_free(beacon->beacon_ies);
  	beacon->beacon_ies = NULL;
  	os_free(beacon->proberesp_ies);
  	beacon->proberesp_ies = NULL;
  	os_free(beacon->assocresp_ies);
  	beacon->assocresp_ies = NULL;
  }
  
  
  static int hostapd_build_beacon_data(struct hostapd_data *hapd,
  				     struct beacon_data *beacon)
  {
  	struct wpabuf *beacon_extra, *proberesp_extra, *assocresp_extra;
  	struct wpa_driver_ap_params params;
  	int ret;
  
  	os_memset(beacon, 0, sizeof(*beacon));
  	ret = ieee802_11_build_ap_params(hapd, &params);
  	if (ret < 0)
  		return ret;
  
  	ret = hostapd_build_ap_extra_ies(hapd, &beacon_extra,
  					 &proberesp_extra,
  					 &assocresp_extra);
  	if (ret)
  		goto free_ap_params;
  
  	ret = -1;
  	beacon->head = os_malloc(params.head_len);
  	if (!beacon->head)
  		goto free_ap_extra_ies;
  
  	os_memcpy(beacon->head, params.head, params.head_len);
  	beacon->head_len = params.head_len;
  
  	beacon->tail = os_malloc(params.tail_len);
  	if (!beacon->tail)
  		goto free_beacon;
  
  	os_memcpy(beacon->tail, params.tail, params.tail_len);
  	beacon->tail_len = params.tail_len;
  
  	if (params.proberesp != NULL) {
  		beacon->probe_resp = os_malloc(params.proberesp_len);
  		if (!beacon->probe_resp)
  			goto free_beacon;
  
  		os_memcpy(beacon->probe_resp, params.proberesp,
  			  params.proberesp_len);
  		beacon->probe_resp_len = params.proberesp_len;
  	}
  
  	/* copy the extra ies */
  	if (beacon_extra) {
  		beacon->beacon_ies = os_malloc(wpabuf_len(beacon_extra));
  		if (!beacon->beacon_ies)
  			goto free_beacon;
  
  		os_memcpy(beacon->beacon_ies,
  			  beacon_extra->buf, wpabuf_len(beacon_extra));
  		beacon->beacon_ies_len = wpabuf_len(beacon_extra);
  	}
  
  	if (proberesp_extra) {
  		beacon->proberesp_ies =
  			os_malloc(wpabuf_len(proberesp_extra));
  		if (!beacon->proberesp_ies)
  			goto free_beacon;
  
  		os_memcpy(beacon->proberesp_ies, proberesp_extra->buf,
  			  wpabuf_len(proberesp_extra));
  		beacon->proberesp_ies_len = wpabuf_len(proberesp_extra);
  	}
  
  	if (assocresp_extra) {
  		beacon->assocresp_ies =
  			os_malloc(wpabuf_len(assocresp_extra));
  		if (!beacon->assocresp_ies)
  			goto free_beacon;
  
  		os_memcpy(beacon->assocresp_ies, assocresp_extra->buf,
  			  wpabuf_len(assocresp_extra));
  		beacon->assocresp_ies_len = wpabuf_len(assocresp_extra);
  	}
  
  	ret = 0;
  free_beacon:
  	/* if the function fails, the caller should not free beacon data */
  	if (ret)
  		free_beacon_data(beacon);
  
  free_ap_extra_ies:
  	hostapd_free_ap_extra_ies(hapd, beacon_extra, proberesp_extra,
  				  assocresp_extra);
  free_ap_params:
  	ieee802_11_free_ap_params(&params);
  	return ret;
  }
  
  
  /*
   * TODO: This flow currently supports only changing channel and width within
   * the same hw_mode. Any other changes to MAC parameters or provided settings
   * are not supported.
   */
  static int hostapd_change_config_freq(struct hostapd_data *hapd,
  				      struct hostapd_config *conf,
  				      struct hostapd_freq_params *params,
  				      struct hostapd_freq_params *old_params)
  {
  	int channel;
  
  	if (!params->channel) {
  		/* check if the new channel is supported by hw */
  		params->channel = hostapd_hw_get_channel(hapd, params->freq);
  	}
  
  	channel = params->channel;
  	if (!channel)
  		return -1;
  
  	/* if a pointer to old_params is provided we save previous state */
  	if (old_params &&
  	    hostapd_set_freq_params(old_params, conf->hw_mode,
  				    hostapd_hw_get_freq(hapd, conf->channel),
  				    conf->channel, conf->ieee80211n,
  				    conf->ieee80211ac,
  				    conf->secondary_channel,
  				    conf->vht_oper_chwidth,
  				    conf->vht_oper_centr_freq_seg0_idx,
  				    conf->vht_oper_centr_freq_seg1_idx,
  				    conf->vht_capab))
  		return -1;
  
  	switch (params->bandwidth) {
  	case 0:
  	case 20:
  	case 40:
  		conf->vht_oper_chwidth = VHT_CHANWIDTH_USE_HT;
  		break;
  	case 80:
  		if (params->center_freq2)
  			conf->vht_oper_chwidth = VHT_CHANWIDTH_80P80MHZ;
  		else
  			conf->vht_oper_chwidth = VHT_CHANWIDTH_80MHZ;
  		break;
  	case 160:
  		conf->vht_oper_chwidth = VHT_CHANWIDTH_160MHZ;
  		break;
  	default:
  		return -1;
  	}
  
  	conf->channel = channel;
  	conf->ieee80211n = params->ht_enabled;
  	conf->secondary_channel = params->sec_channel_offset;
  	ieee80211_freq_to_chan(params->center_freq1,
  			       &conf->vht_oper_centr_freq_seg0_idx);
  	ieee80211_freq_to_chan(params->center_freq2,
  			       &conf->vht_oper_centr_freq_seg1_idx);
  
  	/* TODO: maybe call here hostapd_config_check here? */
  
  	return 0;
  }
  
  
  static int hostapd_fill_csa_settings(struct hostapd_data *hapd,
  				     struct csa_settings *settings)
  {
  	struct hostapd_iface *iface = hapd->iface;
  	struct hostapd_freq_params old_freq;
  	int ret;
  	u8 chan, vht_bandwidth;
  
  	os_memset(&old_freq, 0, sizeof(old_freq));
  	if (!iface || !iface->freq || hapd->csa_in_progress)
  		return -1;
  
  	switch (settings->freq_params.bandwidth) {
  	case 80:
  		if (settings->freq_params.center_freq2)
  			vht_bandwidth = VHT_CHANWIDTH_80P80MHZ;
  		else
  			vht_bandwidth = VHT_CHANWIDTH_80MHZ;
  		break;
  	case 160:
  		vht_bandwidth = VHT_CHANWIDTH_160MHZ;
  		break;
  	default:
  		vht_bandwidth = VHT_CHANWIDTH_USE_HT;
  		break;
  	}
  
  	if (ieee80211_freq_to_channel_ext(
  		    settings->freq_params.freq,
  		    settings->freq_params.sec_channel_offset,
  		    vht_bandwidth,
  		    &hapd->iface->cs_oper_class,
  		    &chan) == NUM_HOSTAPD_MODES) {
  		wpa_printf(MSG_DEBUG,
  			   "invalid frequency for channel switch (freq=%d, sec_channel_offset=%d, vht_enabled=%d)",
  			   settings->freq_params.freq,
  			   settings->freq_params.sec_channel_offset,
  			   settings->freq_params.vht_enabled);
  		return -1;
  	}
  
  	settings->freq_params.channel = chan;
  
  	ret = hostapd_change_config_freq(iface->bss[0], iface->conf,
  					 &settings->freq_params,
  					 &old_freq);
  	if (ret)
  		return ret;
  
  	ret = hostapd_build_beacon_data(hapd, &settings->beacon_after);
  
  	/* change back the configuration */
  	hostapd_change_config_freq(iface->bss[0], iface->conf,
  				   &old_freq, NULL);
  
  	if (ret)
  		return ret;
  
  	/* set channel switch parameters for csa ie */
  	hapd->cs_freq_params = settings->freq_params;
  	hapd->cs_count = settings->cs_count;
  	hapd->cs_block_tx = settings->block_tx;
  
  	ret = hostapd_build_beacon_data(hapd, &settings->beacon_csa);
  	if (ret) {
  		free_beacon_data(&settings->beacon_after);
  		return ret;
  	}
  
  	settings->counter_offset_beacon[0] = hapd->cs_c_off_beacon;
  	settings->counter_offset_presp[0] = hapd->cs_c_off_proberesp;
  	settings->counter_offset_beacon[1] = hapd->cs_c_off_ecsa_beacon;
  	settings->counter_offset_presp[1] = hapd->cs_c_off_ecsa_proberesp;
  
  	return 0;
  }
  
  
  void hostapd_cleanup_cs_params(struct hostapd_data *hapd)
  {
  	os_memset(&hapd->cs_freq_params, 0, sizeof(hapd->cs_freq_params));
  	hapd->cs_count = 0;
  	hapd->cs_block_tx = 0;
  	hapd->cs_c_off_beacon = 0;
  	hapd->cs_c_off_proberesp = 0;
  	hapd->csa_in_progress = 0;
  	hapd->cs_c_off_ecsa_beacon = 0;
  	hapd->cs_c_off_ecsa_proberesp = 0;
  }
  
  
  int hostapd_switch_channel(struct hostapd_data *hapd,
  			   struct csa_settings *settings)
  {
  	int ret;
  
  	if (!(hapd->iface->drv_flags & WPA_DRIVER_FLAGS_AP_CSA)) {
  		wpa_printf(MSG_INFO, "CSA is not supported");
  		return -1;
  	}
  
  	os_printf("hostapd_switch_channel\r\n");
  	ret = hostapd_fill_csa_settings(hapd, settings);
  	if (ret)
  		return ret;
  
  	ret = hostapd_drv_switch_channel(hapd, settings);
  
  	free_beacon_data(&settings->beacon_csa);
  	free_beacon_data(&settings->beacon_after);
  
  	if (ret) {
  		/* if we failed, clean cs parameters */
  		hostapd_cleanup_cs_params(hapd);
  		return ret;
  	}
  
  	hapd->csa_in_progress = 1;
  
  	return 0;
  }
  
  void hostapd_switch_channel_fallback(struct hostapd_iface *iface,
  				const struct hostapd_freq_params *freq_params)
  {
  	int vht_seg0_idx = 0, vht_seg1_idx = 0, vht_bw = VHT_CHANWIDTH_USE_HT;
  	unsigned int i;
  
  	wpa_printf(MSG_DEBUG, "Restarting all CSA-related BSSes");
  
  	if (freq_params->center_freq1)
  		vht_seg0_idx = 36 + (freq_params->center_freq1 - 5180) / 5;
  
  	if (freq_params->center_freq2)
  		vht_seg1_idx = 36 + (freq_params->center_freq2 - 5180) / 5;
  
  	switch (freq_params->bandwidth) {
  	case 0:
  	case 20:
  	case 40:
  		vht_bw = VHT_CHANWIDTH_USE_HT;
  		break;
  	case 80:
  		if (freq_params->center_freq2)
  			vht_bw = VHT_CHANWIDTH_80P80MHZ;
  		else
  			vht_bw = VHT_CHANWIDTH_80MHZ;
  		break;
  	case 160:
  		vht_bw = VHT_CHANWIDTH_160MHZ;
  		break;
  	default:
  		wpa_printf(MSG_WARNING, "Unknown CSA bandwidth: %d",
  			   freq_params->bandwidth);
  		break;
  	}
  
  	iface->freq = freq_params->freq;
  	iface->conf->channel = freq_params->channel;
  	iface->conf->secondary_channel = freq_params->sec_channel_offset;
  	iface->conf->vht_oper_centr_freq_seg0_idx = vht_seg0_idx;
  	iface->conf->vht_oper_centr_freq_seg1_idx = vht_seg1_idx;
  	iface->conf->vht_oper_chwidth = vht_bw;
  	iface->conf->ieee80211n = freq_params->ht_enabled;
  	iface->conf->ieee80211ac = freq_params->vht_enabled;
  
  	/* cs_params must not be cleared earlier because the freq_params
  	 * argument may actually point to one of these.
  	 */
  	for (i = 0; i < iface->num_bss; i++)
  		hostapd_cleanup_cs_params(iface->bss[i]);
  
  	hostapd_disable_iface(iface);
  	hostapd_enable_iface(iface);
  }
  
  
  struct hostapd_data * hostapd_get_iface(struct hapd_interfaces *interfaces,
  					const char *ifname)
  {
  	size_t i, j;
  
  	for (i = 0; i < interfaces->count; i++) {
  		struct hostapd_iface *iface = interfaces->iface[i];
  
  		for (j = 0; j < iface->num_bss; j++) {
  			struct hostapd_data *hapd = iface->bss[j];
  
  			if (os_strcmp(ifname, hapd->conf->iface) == 0)
  				return hapd;
  		}
  	}
  
  	return NULL;
  }
  
  #endif /* NEED_AP_MLME */
  
  
  void hostapd_periodic_iface(struct hostapd_iface *iface)
  {
  	size_t i;
  
  	ap_list_timer(iface);
  
  	for (i = 0; i < iface->num_bss; i++) {
  		struct hostapd_data *hapd = iface->bss[i];
  
  		if (!hapd->started)
  			continue;
  
  #ifndef CONFIG_NO_RADIUS
  		hostapd_acl_expire(hapd);
  #endif /* CONFIG_NO_RADIUS */
  	}
  }
  
  int ap_channel_switch(struct hostapd_iface *ap_iface, int new_freq)
  {
  	struct csa_settings settings = {6};
  
      settings.cs_count = 8;
      settings.freq_params.freq = new_freq;
      settings.freq_params.ht_enabled = 1;
      settings.freq_params.ht_enabled = 0;
  
      if (!ap_iface || !ap_iface->bss[0])
  		return -1;
  
  	return hostapd_switch_channel(ap_iface->bss[0], &settings);
  }
  
  