--- a/samples/main-packet.cc	Wed May 30 09:48:53 2007 +0200
+++ b/samples/main-packet.cc	Wed May 30 10:03:15 2007 +0200
@@ -15,6 +15,7 @@
   void SetData (uint16_t data);
   uint16_t GetData (void) const;
 private:
+  virtual std::string DoGetName (void) const;
   virtual void PrintTo (std::ostream &os) const;
   virtual void SerializeTo (Buffer::Iterator start) const;
   virtual uint32_t DeserializeFrom (Buffer::Iterator start);
@@ -27,6 +28,11 @@
 {}
 MyHeader::~MyHeader ()
 {}
+std::string 
+MyHeader::DoGetName (void) const
+{
+  return "MyHeader";
+}
 void 
 MyHeader::PrintTo (std::ostream &os) const
 {

--- a/src/common/chunk.cc	Wed May 30 09:48:53 2007 +0200
+++ b/src/common/chunk.cc	Wed May 30 10:03:15 2007 +0200
@@ -30,6 +30,11 @@
 Chunk::~Chunk ()
 {}
 
+std::string
+Chunk::GetName (void) const
+{
+  return DoGetName ();
+}
 void 
 Chunk::Print (std::ostream &os) const
 {

--- a/src/common/chunk.h	Wed May 30 09:48:53 2007 +0200
+++ b/src/common/chunk.h	Wed May 30 10:03:15 2007 +0200
@@ -33,11 +33,13 @@
   Chunk ();
   virtual ~Chunk ();
 
+  std::string GetName (void) const;
   void Print (std::ostream &os) const;
   uint32_t GetSize (void) const;
   void Serialize (Buffer::Iterator start) const;
   uint32_t Deserialize (Buffer::Iterator start);
 private:
+  virtual std::string DoGetName (void) const = 0;
   virtual void PrintTo (std::ostream &os) const = 0;
   virtual uint32_t GetSerializedSize (void) const = 0;
   virtual void SerializeTo (Buffer::Iterator i) const = 0;

--- a/src/common/header.h	Wed May 30 09:48:53 2007 +0200
+++ b/src/common/header.h	Wed May 30 10:03:15 2007 +0200
@@ -42,6 +42,10 @@
   virtual ~Header ();
 private:
   /**
+   * \returns a user-readable name to identify this type of header.
+   */
+  virtual std::string DoGetName (void) const = 0;
+  /**
    * \param os the std output stream in which this 
    *       protocol header must print itself.
    */

--- a/src/common/packet-history.cc	Wed May 30 09:48:53 2007 +0200
+++ b/src/common/packet-history.cc	Wed May 30 10:03:15 2007 +0200
@@ -925,6 +925,7 @@
 
 #include <stdarg.h>
 #include <iostream>
+#include <sstream>
 #include "ns3/test.h"
 #include "header.h"
 #include "trailer.h"
@@ -964,6 +965,7 @@
 class HistoryHeader : public Header
 {
 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;
@@ -971,6 +973,15 @@
 };
 
 template <int N>
+std::string 
+HistoryHeader<N>::DoGetName (void) const
+{
+  std::ostringstream oss;
+  oss << N;
+  return oss.str ();
+}
+
+template <int N>
 void 
 HistoryHeader<N>::PrintTo (std::ostream &os) const
 {
@@ -1006,6 +1017,7 @@
 class HistoryTrailer : public Trailer
 {
 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;
@@ -1013,6 +1025,14 @@
 };
 
 template <int N>
+std::string 
+HistoryTrailer<N>::DoGetName (void) const
+{
+  std::ostringstream oss;
+  oss << N;
+  return oss.str ();
+}
+template <int N>
 void 
 HistoryTrailer<N>::PrintTo (std::ostream &os) const
 {

--- a/src/common/trailer.h	Wed May 30 09:48:53 2007 +0200
+++ b/src/common/trailer.h	Wed May 30 10:03:15 2007 +0200
@@ -42,6 +42,10 @@
   virtual ~Trailer ();
 private:
   /**
+   * \returns a user-readable name to identify this type of header.
+   */
+  virtual std::string DoGetName (void) const = 0;
+  /**
    * \param os the std output stream in which this 
    *       protocol trailer must print itself.
    */

--- a/src/internet-node/arp-header.cc	Wed May 30 09:48:53 2007 +0200
+++ b/src/internet-node/arp-header.cc	Wed May 30 10:03:15 2007 +0200
@@ -83,6 +83,11 @@
   return m_ipv4Dest;
 }
 
+std::string 
+ArpHeader::DoGetName (void) const
+{
+  return "Arp";
+}
 
 void 
 ArpHeader::PrintTo (std::ostream &os) const

--- a/src/internet-node/arp-header.h	Wed May 30 09:48:53 2007 +0200
+++ b/src/internet-node/arp-header.h	Wed May 30 10:03:15 2007 +0200
@@ -50,6 +50,7 @@
   Ipv4Address GetDestinationIpv4Address (void);
 
 private:
+  virtual std::string DoGetName (void) const;
   /**
    * \param os
    */

--- a/src/internet-node/ipv4-header.cc	Wed May 30 09:48:53 2007 +0200
+++ b/src/internet-node/ipv4-header.cc	Wed May 30 10:03:15 2007 +0200
@@ -190,6 +190,12 @@
   return m_goodChecksum;
 }
 
+std::string 
+Ipv4Header::DoGetName (void) const
+{
+  return "Ipv4";
+}
+
 void 
 Ipv4Header::PrintTo (std::ostream &os) const
 {

--- a/src/internet-node/ipv4-header.h	Wed May 30 09:48:53 2007 +0200
+++ b/src/internet-node/ipv4-header.h	Wed May 30 10:03:15 2007 +0200
@@ -140,6 +140,7 @@
   bool IsChecksumOk (void) const;
 
 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;

--- a/src/internet-node/udp-header.cc	Wed May 30 09:48:53 2007 +0200
+++ b/src/internet-node/udp-header.cc	Wed May 30 10:03:15 2007 +0200
@@ -91,7 +91,11 @@
   m_initialChecksum = Ipv4ChecksumCalculate (0, buf, 12);
 }
 
-
+std::string 
+UdpHeader::DoGetName (void) const
+{
+  return "Udp";
+}
 
 void 
 UdpHeader::PrintTo (std::ostream &os) const

--- a/src/internet-node/udp-header.h	Wed May 30 09:48:53 2007 +0200
+++ b/src/internet-node/udp-header.h	Wed May 30 10:03:15 2007 +0200
@@ -81,6 +81,7 @@
                            uint8_t protocol);
 
 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;

--- a/src/node/llc-snap-header.cc	Wed May 30 09:48:53 2007 +0200
+++ b/src/node/llc-snap-header.cc	Wed May 30 10:03:15 2007 +0200
@@ -47,6 +47,12 @@
   return 1 + 1 + 1 + 3 + 2;
 }
 
+std::string
+LlcSnapHeader::DoGetName (void) const
+{
+  return "LlcSnap";
+}
+
 void 
 LlcSnapHeader::PrintTo (std::ostream &os) const
 {

--- a/src/node/llc-snap-header.h	Wed May 30 09:48:53 2007 +0200
+++ b/src/node/llc-snap-header.h	Wed May 30 10:03:15 2007 +0200
@@ -37,6 +37,7 @@
   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;