Bring up the ethernet interface when detected

We don't get link status info if it's down.  If the device has been configured
for ethernet and we see the interface appear, we should make it active.

bug:6444395
Change-Id: Ibc233ab12942b069d7db9c0671936798c5161659

Author: Robert Greenwalt

core/java/android/net/EthernetDataTracker.java

@@ -59,6 +59,8 @@ public class EthernetDataTracker implements NetworkStateTracker {
     private static String sIfaceMatch = "";
     private static String mIface = "";
 
+    private INetworkManagementService mNMService;
+
     private static class InterfaceObserver extends INetworkManagementEventObserver.Stub {
         private EthernetDataTracker mTracker;
 
@@ -117,6 +119,13 @@ private void interfaceAdded(String iface) {
             mIface = iface;
         }
 
+        // we don't get link status indications unless the iface is up - bring it up
+        try {
+            mNMService.setInterfaceUp(iface);
+        } catch (Exception e) {
+            Log.e(TAG, "Error upping interface " + iface + ": " + e);
+        }
+
         mNetworkInfo.setIsAvailable(true);
         Message msg = mCsHandler.obtainMessage(EVENT_CONFIGURATION_CHANGED, mNetworkInfo);
         msg.sendToTarget();
@@ -199,7 +208,7 @@ public void startMonitoring(Context context, Handler target) {
 
         // register for notifications from NetworkManagement Service
         IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE);
-        INetworkManagementService service = INetworkManagementService.Stub.asInterface(b);
+        mNMService = INetworkManagementService.Stub.asInterface(b);
 
         mInterfaceObserver = new InterfaceObserver(this);
 
@@ -208,12 +217,12 @@ public void startMonitoring(Context context, Handler target) {
         sIfaceMatch = context.getResources().getString(
             com.android.internal.R.string.config_ethernet_iface_regex);
         try {
-            final String[] ifaces = service.listInterfaces();
+            final String[] ifaces = mNMService.listInterfaces();
             for (String iface : ifaces) {
                 if (iface.matches(sIfaceMatch)) {
                     mIface = iface;
-                    service.setInterfaceUp(iface);
-                    InterfaceConfiguration config = service.getInterfaceConfig(iface);
+                    mNMService.setInterfaceUp(iface);
+                    InterfaceConfiguration config = mNMService.getInterfaceConfig(iface);
                     mLinkUp = config.isActive();
                     if (config != null && mHwAddr == null) {
                         mHwAddr = config.getHardwareAddress();
@@ -230,7 +239,7 @@ public void startMonitoring(Context context, Handler target) {
         }
 
         try {
-            service.registerObserver(mInterfaceObserver);
+            mNMService.registerObserver(mInterfaceObserver);
         } catch (RemoteException e) {
             Log.e(TAG, "Could not register InterfaceObserver " + e);
         }