| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.net.wifi; |
| |
| import android.content.Context; |
| import android.net.wifi.WifiConfiguration.KeyMgmt; |
| import android.os.Environment; |
| import android.os.Message; |
| import android.os.Handler; |
| import android.os.HandlerThread; |
| import android.util.Log; |
| |
| import java.io.BufferedInputStream; |
| import java.io.BufferedOutputStream; |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.util.UUID; |
| |
| import com.android.internal.R; |
| |
| |
| /** |
| * Provides API to the WifiStateMachine for doing read/write access |
| * to soft access point configuration |
| */ |
| class WifiApConfigStore { |
| |
| private static Context sContext; |
| private static final String TAG = "WifiApConfigStore"; |
| |
| private static final String AP_CONFIG_FILE = Environment.getDataDirectory() + |
| "/misc/wifi/softap.conf"; |
| |
| private static final int AP_CONFIG_FILE_VERSION = 1; |
| |
| private static WifiConfiguration sApConfig = new WifiConfiguration(); |
| private static final Object sApConfigLock = new Object(); |
| |
| private static FileReadWriteHandler sFileReadWriteHandler; |
| private static final int READ_AP_CONFIG = 1; |
| private static final int WRITE_AP_CONFIG = 2; |
| |
| static void initialize(Context context) { |
| sContext = context; |
| |
| /* File operations happen on a seperate thread */ |
| HandlerThread configThread = new HandlerThread("WifiApConfigStore"); |
| configThread.start(); |
| sFileReadWriteHandler = new FileReadWriteHandler(configThread.getLooper()); |
| Message.obtain(sFileReadWriteHandler, READ_AP_CONFIG).sendToTarget(); |
| } |
| |
| |
| static void setApConfiguration(WifiConfiguration config) { |
| synchronized (sApConfigLock) { |
| sApConfig = config; |
| } |
| Message.obtain(sFileReadWriteHandler, WRITE_AP_CONFIG, new WifiConfiguration(config)) |
| .sendToTarget(); |
| } |
| |
| static WifiConfiguration getApConfiguration() { |
| synchronized (sApConfigLock) { |
| return new WifiConfiguration(sApConfig); |
| } |
| } |
| |
| /** |
| * File read/write handler |
| */ |
| private static class FileReadWriteHandler extends Handler { |
| |
| public FileReadWriteHandler(android.os.Looper looper) { |
| super(looper); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case WRITE_AP_CONFIG: |
| writeApConfiguration((WifiConfiguration) msg.obj); |
| break; |
| case READ_AP_CONFIG: |
| readApConfiguration(); |
| break; |
| default: |
| Log.e(TAG, "Unknown command in FileReadWriteHandler: " + msg); |
| break; |
| } |
| } |
| |
| private static void writeApConfiguration(final WifiConfiguration config) { |
| DataOutputStream out = null; |
| try { |
| out = new DataOutputStream(new BufferedOutputStream( |
| new FileOutputStream(AP_CONFIG_FILE))); |
| |
| out.writeInt(AP_CONFIG_FILE_VERSION); |
| out.writeUTF(config.SSID); |
| int authType = config.getAuthType(); |
| out.writeInt(authType); |
| if(authType != KeyMgmt.NONE) { |
| out.writeUTF(config.preSharedKey); |
| } |
| } catch (IOException e) { |
| Log.e(TAG, "Error writing hotspot configuration" + e); |
| } finally { |
| if (out != null) { |
| try { |
| out.close(); |
| } catch (IOException e) {} |
| } |
| } |
| } |
| |
| private static void readApConfiguration() { |
| DataInputStream in = null; |
| try { |
| WifiConfiguration config = new WifiConfiguration(); |
| in = new DataInputStream(new BufferedInputStream(new FileInputStream( |
| AP_CONFIG_FILE))); |
| |
| int version = in.readInt(); |
| if (version != 1) { |
| Log.e(TAG, "Bad version on hotspot configuration file, set defaults"); |
| setDefaultApConfiguration(); |
| return; |
| } |
| config.SSID = in.readUTF(); |
| int authType = in.readInt(); |
| config.allowedKeyManagement.set(authType); |
| if (authType != KeyMgmt.NONE) { |
| config.preSharedKey = in.readUTF(); |
| } |
| synchronized (sApConfigLock) { |
| sApConfig = config; |
| } |
| } catch (IOException ignore) { |
| setDefaultApConfiguration(); |
| } finally { |
| if (in != null) { |
| try { |
| in.close(); |
| } catch (IOException e) {} |
| } |
| } |
| } |
| |
| /* 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 static void setDefaultApConfiguration() { |
| WifiConfiguration config = new WifiConfiguration(); |
| config.SSID = sContext.getString(R.string.wifi_tether_configure_ssid_default); |
| config.allowedKeyManagement.set(KeyMgmt.WPA2_PSK); |
| String randomUUID = UUID.randomUUID().toString(); |
| //first 12 chars from xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx |
| config.preSharedKey = randomUUID.substring(0, 8) + randomUUID.substring(9,13); |
| setApConfiguration(config); |
| } |
| } |
| } |