add Chunk::GetName and implement it

src/node/llc-snap-header.cc

@@ -47,6 +47,12 @@ LlcSnapHeader::GetSerializedSize (void) const
   return 1 + 1 + 1 + 3 + 2;
 }
 
+std::string
+LlcSnapHeader::DoGetName (void) const
+{
+  return "LlcSnap";
+}
+
 void 
 LlcSnapHeader::PrintTo (std::ostream &os) const
 {

src/node/llc-snap-header.h

@@ -37,6 +37,7 @@ class LlcSnapHeader : public Header {
   uint16_t GetType (void);
 
 private:
+  virtual std::string DoGetName (void) const;
   virtual void PrintTo (std::ostream &os) const;
   virtual uint32_t GetSerializedSize (void) const;
   virtual void SerializeTo (Buffer::Iterator start) const;