Add NETLINK_ROUTE processing to the netlink client code, so that Ethernet
physical-layer up/down events can be tracked.  Upper layers will use these
events to enable/disable Ethernet connectivity.

Change-Id: If07c30c4d79f26cf94eb5597be651ebbf9d072c6
diff --git a/include/sysutils/NetlinkEvent.h b/include/sysutils/NetlinkEvent.h
index b329b09..1ee9849 100644
--- a/include/sysutils/NetlinkEvent.h
+++ b/include/sysutils/NetlinkEvent.h
@@ -30,17 +30,23 @@
     const static int NlActionAdd;
     const static int NlActionRemove;
     const static int NlActionChange;
+    const static int NlActionLinkDown;
+    const static int NlActionLinkUp;
 
     NetlinkEvent();
     virtual ~NetlinkEvent();
 
-    bool decode(char *buffer, int size);
+    bool decode(char *buffer, int size, int format);
     const char *findParam(const char *paramName);
 
     const char *getSubsystem() { return mSubsystem; }
     int getAction() { return mAction; }
 
     void dump();
+
+ protected:
+    bool parseBinaryNetlinkMessage(char *buffer, int size);
+    bool parseAsciiNetlinkMessage(char *buffer, int size);
 };
 
 #endif