2 files changed, 33 insertions, 1 deletions
diff --git a/services/java/com/android/server/ConnectivityService.java b/services/java/com/android/server/ConnectivityService.java
index 7f9dc26..c6981ca 100644
--- a/services/java/com/android/server/ConnectivityService.java
+++ b/services/java/com/android/server/ConnectivityService.java
@@ -2299,6 +2299,7 @@ public class ConnectivityService extends IConnectivityManager.Stub {
         }
         thisNet.setTeardownRequested(false);
         updateNetworkSettings(thisNet);
+        updateMtuSizeSettings(thisNet);
         handleConnectivityChange(newNetType, false);
         sendConnectedBroadcastDelayed(info, getConnectivityChangeDelay());
 
@@ -2636,6 +2637,26 @@ public class ConnectivityService extends IConnectivityManager.Stub {
         return routesChanged;
     }
 
+   /**
+     * Reads the network specific MTU size from reources.
+     * and set it on it's iface.
+     */
+   private void updateMtuSizeSettings(NetworkStateTracker nt) {
+       final String iface = nt.getLinkProperties().getInterfaceName();
+       final int mtu = nt.getLinkProperties().getMtu();
+
+       if (mtu < 68 || mtu > 10000) {
+           loge("Unexpected mtu value: " + nt);
+           return;
+       }
+
+       try {
+           if (VDBG) log("Setting MTU size: " + iface + ", " + mtu);
+           mNetd.setMtu(iface, mtu);
+       } catch (Exception e) {
+           Slog.e(TAG, "exception in setMtu()" + e);
+       }
+   }
 
     /**
      * Reads the network specific TCP buffer sizes from SystemProperties
@@ -4774,4 +4795,3 @@ public class ConnectivityService extends IConnectivityManager.Stub {
         mAlarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, wakeupTime, intent);
     }
 }
-
diff --git a/services/java/com/android/server/NetworkManagementService.java b/services/java/com/android/server/NetworkManagementService.java
index dfcab29..82cc540 100644
--- a/services/java/com/android/server/NetworkManagementService.java
+++ b/services/java/com/android/server/NetworkManagementService.java
@@ -838,6 +838,18 @@ public class NetworkManagementService extends INetworkManagementService.Stub
     }
 
     @Override
+    public void setMtu(String iface, int mtu) {
+        mContext.enforceCallingOrSelfPermission(CONNECTIVITY_INTERNAL, TAG);
+
+        final NativeDaemonEvent event;
+        try {
+            event = mConnector.execute("interface", "setmtu", iface, mtu);
+        } catch (NativeDaemonConnectorException e) {
+            throw e.rethrowAsParcelableException();
+        }
+    }
+
+    @Override
     public void shutdown() {
         // TODO: remove from aidl if nobody calls externally
         mContext.enforceCallingOrSelfPermission(SHUTDOWN, TAG);