public void addDefaultRoute() {
   if ((mInterfaceName != null) && (mDefaultGatewayAddr != 0) && mDefaultRouteSet == false) {
     if (DBG) {
       Log.d(
           TAG,
           "addDefaultRoute for "
               + mNetworkInfo.getTypeName()
               + " ("
               + mInterfaceName
               + "), GatewayAddr="
               + mDefaultGatewayAddr);
     }
     NetworkUtils.setDefaultRoute(mInterfaceName, mDefaultGatewayAddr);
     mDefaultRouteSet = true;
   }
 }