From e2d155a51e68694e17fa6e27d05c928215a5dbcf Mon Sep 17 00:00:00 2001
From: Robert Greenwalt <robdroid@android.com>
Date: Wed, 21 Oct 2009 14:58:34 -0700
Subject: Add a new API for initing Wifi multicast filtering

Gets rid of the old method which generated Log noise.

bug: 1973855
---
 services/java/com/android/server/WifiService.java | 13 +++++++++++++
 wifi/java/android/net/wifi/IWifiManager.aidl      |  2 ++
 wifi/java/android/net/wifi/WifiManager.java       | 13 +++++++++++++
 wifi/java/android/net/wifi/WifiStateTracker.java  | 10 +---------
 4 files changed, 29 insertions(+), 9 deletions(-)

diff --git a/services/java/com/android/server/WifiService.java b/services/java/com/android/server/WifiService.java
index 89d969d..370ee68 100644
--- a/services/java/com/android/server/WifiService.java
+++ b/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();
 
diff --git a/wifi/java/android/net/wifi/IWifiManager.aidl b/wifi/java/android/net/wifi/IWifiManager.aidl
index 73dbb6f..f3738e3 100644
--- a/wifi/java/android/net/wifi/IWifiManager.aidl
+++ b/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);
diff --git a/wifi/java/android/net/wifi/WifiManager.java b/wifi/java/android/net/wifi/WifiManager.java
index 27755ed..178f76e 100644
--- a/wifi/java/android/net/wifi/WifiManager.java
+++ b/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;
+        }
+    }
 }
diff --git a/wifi/java/android/net/wifi/WifiStateTracker.java b/wifi/java/android/net/wifi/WifiStateTracker.java
index b7d3a6e..d8538ea 100644
--- a/wifi/java/android/net/wifi/WifiStateTracker.java
+++ b/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);
-- 
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