Merge change Ie2d155a5 into eclair-mr2

* changes:
  Add a new API for initing Wifi multicast filtering

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

@@ -1829,6 +1829,19 @@ public class WifiService extends IWifiManager.Stub {
         }
     }
 
+    public void initializeMulticastFiltering() {
+        enforceMulticastChangePermission();
+
+        synchronized (mMulticasters) {
+            // if anybody had requested filters be off, leave off
+            if (mMulticasters.size() != 0) {
+                return;
+            } else {
+                WifiNative.startPacketFiltering();
+            }
+        }
+    }
+
     public void acquireMulticastLock(IBinder binder, String tag) {
         enforceMulticastChangePermission();
 

wifi/java/android/net/wifi/IWifiManager.aidl

@@ -70,6 +70,8 @@ interface IWifiManager
 
     boolean releaseWifiLock(IBinder lock);
 
+    void initializeMulticastFiltering();
+
     boolean isMulticastEnabled();
 
     void acquireMulticastLock(IBinder binder, String tag);

wifi/java/android/net/wifi/WifiManager.java

@@ -1056,4 +1056,17 @@ public class WifiManager {
             return false;
         }
     }
+
+    /**
+     * Initialize the multicast filtering to 'on'
+     * @hide no intent to publish
+     */
+    public boolean initializeMulticastFiltering() {
+        try {
+            mService.initializeMulticastFiltering();
+            return true;
+        } catch (RemoteException e) {
+             return false;
+        }
+    }
 }

wifi/java/android/net/wifi/WifiStateTracker.java

@@ -786,16 +786,8 @@ public class WifiStateTracker extends NetworkStateTracker {
                  * Filter out multicast packets. This saves battery power, since
                  * the CPU doesn't have to spend time processing packets that
                  * are going to end up being thrown away.
-                 *
-                 * Note that rather than turn this off directly, we use the
-                 * public api - this keeps us all in sync - turn multicast on
-                 * first and then off.. if nobody else wants it on it'll be
-                 * off then and it's all synchronized within the API.
                  */
-                WifiManager.MulticastLock l = 
-                        mWM.createMulticastLock("WifiStateTracker");
-                l.acquire();
-                l.release();
+                mWM.initializeMulticastFiltering();
 
                 if (mBluetoothA2dp == null) {
                     mBluetoothA2dp = new BluetoothA2dp(mContext);