First step of refactoring code (ccnx prefix => ndn prefix)
diff --git a/model/forwarding-strategy/flooding.h b/model/forwarding-strategy/flooding.h
index 71665c7..32fa7ae 100644
--- a/model/forwarding-strategy/flooding.h
+++ b/model/forwarding-strategy/flooding.h
@@ -28,7 +28,7 @@
 namespace ndnSIM {
 
 /**
- * \ingroup ccnx
+ * \ingroup ndn
  * \brief Flooding strategy
  *
  * \todo Describe
@@ -45,12 +45,12 @@
   Flooding ();
 
 protected:
-  // inherited from  Nacks/CcnxForwardingStrategy
+  // inherited from  Nacks/NdnForwardingStrategy
   virtual bool
-  DoPropagateInterest (const Ptr<CcnxFace> &incomingFace,
-                       Ptr<CcnxInterestHeader> header,
+  DoPropagateInterest (const Ptr<NdnFace> &incomingFace,
+                       Ptr<NdnInterestHeader> header,
                        const Ptr<const Packet> &packet,
-                       Ptr<CcnxPitEntry> pitEntry);
+                       Ptr<NdnPitEntry> pitEntry);
 
 private:
   typedef Nacks super;