make Queue derive from Interface

src/node/queue.cc

@@ -26,9 +26,12 @@ NS_DEBUG_COMPONENT_DEFINE ("Queue");
 
 namespace ns3 {
 
+const InterfaceId Queue::iid ("Queue");
+
 Queue* Queue::defaultQueue = 0;
 
 Queue::Queue() : 
+  Interface (Queue::iid),
   m_nBytes(0), 
   m_nTotalReceivedBytes(0),
   m_nPackets(0), 

src/node/queue.h

@@ -28,6 +28,7 @@
 #include <string>
 #include <list>
 #include "ns3/packet.h"
+#include "ns3/interface.h"
 #include "ns3/callback-trace-source.h"
 #include "ns3/trace-resolver.h"
 
@@ -35,9 +36,11 @@ namespace ns3 {
 
 class StringEnumDefaultValue;
 
-class Queue
+class Queue : public Interface
 {
 public:
+  static const InterfaceId iid;
+
   enum TraceType {
     ENQUEUE,
     DEQUEUE,