content: /*
   * Copyright (C) 2015 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 com.android.server.wifi.scanner;
  
  import android.content.Context;
  import android.net.wifi.WifiScanner;
  import android.os.Handler;
  import android.os.Looper;
  import android.os.Message;
  import android.util.Log;
  
  import com.android.server.wifi.Clock;
  import com.android.server.wifi.WifiMonitor;
  import com.android.server.wifi.WifiNative;
  
  import java.io.FileDescriptor;
  import java.io.PrintWriter;
  
  /**
   * WifiScanner implementation that takes advantage of the gscan HAL API
   * The gscan API is used to perform background scans and wificond is used for oneshot scans.
   * @see com.android.server.wifi.scanner.WifiScannerImpl for more details on each method.
   */
  public class HalWifiScannerImpl extends WifiScannerImpl implements Handler.Callback {
      private static final String TAG = "HalWifiScannerImpl";
      private static final boolean DBG = false;
  
      private final String mIfaceName;
      private final WifiNative mWifiNative;
      private final ChannelHelper mChannelHelper;
      private final WificondScannerImpl mWificondScannerDelegate;
  
      public HalWifiScannerImpl(Context context, String ifaceName, WifiNative wifiNative,
                                WifiMonitor wifiMonitor, Looper looper, Clock clock) {
          mIfaceName = ifaceName;
          mWifiNative = wifiNative;
          mChannelHelper = new WificondChannelHelper(wifiNative);
          mWificondScannerDelegate =
                  new WificondScannerImpl(context, mIfaceName, wifiNative, wifiMonitor,
                          mChannelHelper, looper, clock);
      }
  
      @Override
      public boolean handleMessage(Message msg) {
          Log.w(TAG, "Unknown message received: " + msg.what);
          return true;
      }
  
      @Override
      public void cleanup() {
          mWificondScannerDelegate.cleanup();
      }
  
      @Override
      public boolean getScanCapabilities(WifiNative.ScanCapabilities capabilities) {
          return mWifiNative.getBgScanCapabilities(
                  mIfaceName, capabilities);
      }
  
      @Override
      public ChannelHelper getChannelHelper() {
          return mChannelHelper;
      }
  
      public boolean startSingleScan(WifiNative.ScanSettings settings,
              WifiNative.ScanEventHandler eventHandler) {
          return mWificondScannerDelegate.startSingleScan(settings, eventHandler);
      }
  
      @Override
      public WifiScanner.ScanData getLatestSingleScanResults() {
          return mWificondScannerDelegate.getLatestSingleScanResults();
      }
  
      @Override
      public boolean startBatchedScan(WifiNative.ScanSettings settings,
              WifiNative.ScanEventHandler eventHandler) {
          if (settings == null || eventHandler == null) {
              Log.w(TAG, "Invalid arguments for startBatched: settings=" + settings
                      + ",eventHandler=" + eventHandler);
              return false;
          }
          return mWifiNative.startBgScan(
                  mIfaceName, settings, eventHandler);
      }
  
      @Override
      public void stopBatchedScan() {
          mWifiNative.stopBgScan(mIfaceName);
      }
  
      @Override
      public void pauseBatchedScan() {
          mWifiNative.pauseBgScan(mIfaceName);
      }
  
      @Override
      public void restartBatchedScan() {
          mWifiNative.restartBgScan(mIfaceName);
      }
  
      @Override
      public WifiScanner.ScanData[] getLatestBatchedScanResults(boolean flush) {
          return mWifiNative.getBgScanResults(mIfaceName);
      }
  
      @Override
      public boolean setHwPnoList(WifiNative.PnoSettings settings,
              WifiNative.PnoEventHandler eventHandler) {
          return mWificondScannerDelegate.setHwPnoList(settings, eventHandler);
      }
  
      @Override
      public boolean resetHwPnoList() {
          return mWificondScannerDelegate.resetHwPnoList();
      }
  
      @Override
      public boolean isHwPnoSupported(boolean isConnectedPno) {
          return mWificondScannerDelegate.isHwPnoSupported(isConnectedPno);
      }
  
      @Override
      protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
          mWificondScannerDelegate.dump(fd, pw, args);
      }
  }
  