Move Wifi Ap configuration to flat file (97b4cf78) · Commits · e / os / android_frameworks_base

core/java/android/provider/Settings.java

+0 −21

Original line number	Diff line number	Diff line
		@@ -2599,27 +2599,6 @@ public final class Settings {
		*/
		public static final String WIFI_SAVED_STATE = "wifi_saved_state";

		/**
		* AP SSID
		*
		* @hide
		*/
		public static final String WIFI_AP_SSID = "wifi_ap_ssid";

		/**
		* AP security
		*
		* @hide
		*/
		public static final String WIFI_AP_SECURITY = "wifi_ap_security";

		/**
		* AP passphrase
		*
		* @hide
		*/
		public static final String WIFI_AP_PASSWD = "wifi_ap_passwd";

		/**
		* The acceptable packet loss percentage (range 0 - 100) before trying
		* another AP on the same network.

services/java/com/android/server/WifiService.java

+120 −31

Original line number	Diff line number	Diff line
		@@ -53,6 +53,7 @@ import android.net.NetworkStateTracker;
		import android.net.DhcpInfo;
		import android.net.NetworkUtils;
		import android.os.Binder;
		import android.os.Environment;
		import android.os.Handler;
		import android.os.HandlerThread;
		import android.os.IBinder;
		@@ -68,6 +69,17 @@ import android.provider.Settings;
		import android.util.Slog;
		import android.text.TextUtils;

		import java.io.BufferedInputStream;
		import java.io.BufferedOutputStream;
		import java.io.DataInputStream;
		import java.io.DataOutputStream;
		import java.io.EOFException;
		import java.io.FileDescriptor;
		import java.io.FileInputStream;
		import java.io.FileOutputStream;
		import java.io.IOException;
		import java.io.PrintWriter;
		import java.net.UnknownHostException;
		import java.util.ArrayList;
		import java.util.BitSet;
		import java.util.HashMap;
		@@ -76,9 +88,7 @@ import java.util.List;
		import java.util.Map;
		import java.util.Set;
		import java.util.regex.Pattern;
		import java.io.FileDescriptor;
		import java.io.PrintWriter;
		import java.net.UnknownHostException;
		import java.util.UUID;

		import com.android.internal.app.IBatteryStats;
		import android.app.backup.IBackupManager;
		@@ -176,6 +186,8 @@ public class WifiService extends IWifiManager.Stub {
		private static final int MESSAGE_START_SCAN = 10;
		private static final int MESSAGE_REPORT_WORKSOURCE = 11;
		private static final int MESSAGE_ENABLE_RSSI_POLLING = 12;
		private static final int MESSAGE_WRITE_WIFI_AP_CONFIG = 13;
		private static final int MESSAGE_READ_WIFI_AP_CONFIG = 14;


		private final WifiHandler mWifiHandler;
		@@ -218,6 +230,13 @@ public class WifiService extends IWifiManager.Stub {
		private static final String ACTION_DEVICE_IDLE =
		"com.android.server.WifiManager.action.DEVICE_IDLE";

		private static final String WIFIAP_CONFIG_FILE = Environment.getDataDirectory() +
		"/misc/wifi/softap.conf";

		private static final int WIFIAP_CONFIG_VERSION = 1;
		private WifiConfiguration mWifiApConfig = new WifiConfiguration();
		private final Object mWifiApConfigLock = new Object();

		WifiService(Context context, WifiStateTracker tracker) {
		mContext = context;
		mWifiStateTracker = tracker;
		@@ -281,6 +300,9 @@ public class WifiService extends IWifiManager.Stub {

		}
		},new IntentFilter(ConnectivityManager.ACTION_TETHER_STATE_CHANGED));

		//Initiate a read of Wifi Ap configuration
		Message.obtain(mWifiHandler, MESSAGE_READ_WIFI_AP_CONFIG).sendToTarget();
		}

		/**
		@@ -634,37 +656,102 @@ public class WifiService extends IWifiManager.Stub {

		public WifiConfiguration getWifiApConfiguration() {
		enforceAccessPermission();
		final ContentResolver cr = mContext.getContentResolver();
		WifiConfiguration wifiConfig = new WifiConfiguration();
		int authType;
		try {
		wifiConfig.SSID = Settings.Secure.getString(cr, Settings.Secure.WIFI_AP_SSID);
		if (wifiConfig.SSID == null)
		return null;
		authType = Settings.Secure.getInt(cr, Settings.Secure.WIFI_AP_SECURITY);
		wifiConfig.allowedKeyManagement.set(authType);
		wifiConfig.preSharedKey = Settings.Secure.getString(cr, Settings.Secure.WIFI_AP_PASSWD);
		return wifiConfig;
		} catch (Settings.SettingNotFoundException e) {
		Slog.e(TAG,"AP settings not found, returning");
		return null;
		synchronized (mWifiApConfigLock) {
		WifiConfiguration config = new WifiConfiguration();
		config.SSID = mWifiApConfig.SSID;
		if (mWifiApConfig.allowedKeyManagement.get(KeyMgmt.WPA_PSK)) {
		config.allowedKeyManagement.set(KeyMgmt.WPA_PSK);
		config.preSharedKey = mWifiApConfig.preSharedKey;
		} else {
		config.allowedKeyManagement.set(KeyMgmt.NONE);
		}
		return config;
		}
		}

		public void setWifiApConfiguration(WifiConfiguration wifiConfig) {
		enforceChangePermission();
		final ContentResolver cr = mContext.getContentResolver();
		boolean isWpa;
		if (wifiConfig == null)
		return;
		Settings.Secure.putString(cr, Settings.Secure.WIFI_AP_SSID, wifiConfig.SSID);
		isWpa = wifiConfig.allowedKeyManagement.get(KeyMgmt.WPA_PSK);
		Settings.Secure.putInt(cr,
		Settings.Secure.WIFI_AP_SECURITY,
		isWpa ? KeyMgmt.WPA_PSK : KeyMgmt.NONE);
		if (isWpa)
		Settings.Secure.putString(cr, Settings.Secure.WIFI_AP_PASSWD, wifiConfig.preSharedKey);
		Message.obtain(mWifiHandler, MESSAGE_WRITE_WIFI_AP_CONFIG, wifiConfig).sendToTarget();
		}

		/* Generate a default WPA2 based configuration with a random password.

		We are changing the Wifi Ap configuration storage from secure settings to a
		flat file accessible only by the system. A WPA2 based default configuration
		will keep the device secure after the update */
		private void setDefaultWifiApConfiguration() {
		synchronized (mWifiApConfigLock) {
		mWifiApConfig.SSID = mContext.getString(R.string.wifi_tether_configure_ssid_default);
		mWifiApConfig.allowedKeyManagement.set(KeyMgmt.WPA_PSK);
		String randomUUID = UUID.randomUUID().toString();
		//first 12 chars from xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
		mWifiApConfig.preSharedKey = randomUUID.substring(0, 8) + randomUUID.substring(9,13);
		}
		}

		private void writeWifiApConfigBlocked(WifiConfiguration wifiConfig) {
		DataOutputStream out = null;
		try {
		out = new DataOutputStream(new BufferedOutputStream(
		new FileOutputStream(WIFIAP_CONFIG_FILE)));

		out.writeInt(WIFIAP_CONFIG_VERSION);
		out.writeUTF(wifiConfig.SSID);
		if(wifiConfig.allowedKeyManagement.get(KeyMgmt.WPA_PSK)) {
		out.writeInt(KeyMgmt.WPA_PSK);
		out.writeUTF(wifiConfig.preSharedKey);
		} else {
		out.writeInt(KeyMgmt.NONE);
		}
		synchronized (mWifiApConfigLock) {
		mWifiApConfig = wifiConfig;
		}
		} catch (IOException e) {
		Slog.e(TAG, "Error writing hotspot configuration" + e);
		} finally {
		if (out != null) {
		try {
		out.close();
		} catch (IOException e) {}
		}
		}
		}

		private void readWifiApConfigBlocked() {
		DataInputStream in = null;
		try {
		WifiConfiguration config = new WifiConfiguration();
		in = new DataInputStream(new BufferedInputStream(new FileInputStream(
		WIFIAP_CONFIG_FILE)));

		int version = in.readInt();
		if (version != 1) {
		Slog.e(TAG, "Bad version on hotspot configuration file, set defaults");
		setDefaultWifiApConfiguration();
		return;
		}
		config.SSID = in.readUTF();
		int authType = in.readInt();
		config.allowedKeyManagement.set(authType);
		if (authType != KeyMgmt.NONE) {
		config.preSharedKey = in.readUTF();
		}
		synchronized (mWifiApConfigLock) {
		mWifiApConfig = config;
		}
		} catch (IOException ignore) {
		setDefaultWifiApConfiguration();
		} finally {
		if (in != null) {
		try {
		in.close();
		} catch (IOException e) {}
		}
		}
		}


		/**
		* Enables/disables Wi-Fi AP synchronously. The driver is loaded
		@@ -716,11 +803,7 @@ public class WifiService extends IWifiManager.Stub {
		if (enable) {

		/* Use default config if there is no existing config */
		if (wifiConfig == null && ((wifiConfig = getWifiApConfiguration()) == null)) {
		wifiConfig = new WifiConfiguration();
		wifiConfig.SSID = mContext.getString(R.string.wifi_tether_configure_ssid_default);
		wifiConfig.allowedKeyManagement.set(KeyMgmt.NONE);
		}
		if (wifiConfig == null) wifiConfig = getWifiApConfiguration();

		if (!mWifiStateTracker.loadDriver()) {
		Slog.e(TAG, "Failed to load Wi-Fi driver for AP mode");
		@@ -2038,6 +2121,12 @@ public class WifiService extends IWifiManager.Stub {
		case MESSAGE_ENABLE_RSSI_POLLING:
		mWifiStateTracker.enableRssiPolling(msg.arg1 == 1);
		break;
		case MESSAGE_WRITE_WIFI_AP_CONFIG:
		writeWifiApConfigBlocked((WifiConfiguration) msg.obj);
		break;
		case MESSAGE_READ_WIFI_AP_CONFIG:
		readWifiApConfigBlocked();
		break;
		}
		}
		}