/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2006,2007 INRIA

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation;

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#include "ns3/tag.h"

#include "ns3/packet.h"

#include "ns3/uinteger.h"

#include <iostream>

using namespace ns3;

// define this class in a public header

class MyTag : public Tag

{

public:

  static TypeId GetTypeId (void);

  virtual TypeId GetInstanceTypeId (void) const;

  virtual uint32_t GetSerializedSize (void) const;

  virtual void Serialize (TagBuffer i) const;

  virtual void Deserialize (TagBuffer i);

  virtual void Print (std::ostream &os) const;

  // these are our accessors to our tag structure

  void SetSimpleValue (uint8_t value);

  uint8_t GetSimpleValue (void) const;

private:

  uint8_t m_simpleValue;

};

TypeId 

MyTag::GetTypeId (void)

{

  static TypeId tid = TypeId ("ns3::MyTag")

    .SetParent<Tag> ()

    .AddConstructor<MyTag> ()

    .AddAttribute ("SimpleValue",

                   "A simple value",

                   EmptyAttributeValue (),

                   MakeUintegerAccessor (&MyTag::GetSimpleValue),

                   MakeUintegerChecker<uint8_t> ())

    ;

  return tid;

}

TypeId 

MyTag::GetInstanceTypeId (void) const

{

  return GetTypeId ();

}

uint32_t 

MyTag::GetSerializedSize (void) const

{

  return 1;

}

void 

MyTag::Serialize (TagBuffer i) const

{

  i.WriteU8 (m_simpleValue);

}

void 

MyTag::Deserialize (TagBuffer i)

{

  m_simpleValue = i.ReadU8 ();

}

void 

MyTag::Print (std::ostream &os) const

{

  os << "v=" << (uint32_t)m_simpleValue;

}

void 

MyTag::SetSimpleValue (uint8_t value)

{

  m_simpleValue = value;

}

uint8_t 

MyTag::GetSimpleValue (void) const

{

  return m_simpleValue;

}

int main (int argc, char *argv[])

{

  // create a tag.

  MyTag tag;

  tag.SetSimpleValue (0x56);

  // store the tag in a packet.

  Ptr<Packet> p = Create<Packet> (100);

  p->AddTag (tag);

  // create a copy of the packet

  Ptr<Packet> aCopy = p->Copy ();

  // read the tag from the packet copy

  MyTag tagCopy;

  p->FindFirstMatchingTag (tagCopy);

  // the copy and the original are the same !

  NS_ASSERT (tagCopy.GetSimpleValue () == tag.GetSimpleValue ());

  aCopy->PrintTags (std::cout);

  std::cout << std::endl;

  return 0;

}