MPLSPacket.h

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//
// (C) 2005 Vojtech Janota
// (C) 2003 Xuan Thang Nguyen
//
// This library is free software, you can redistribute it
// and/or modify
// it under  the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation;
// either version 2 of the License, or any later version.
// The library 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 Lesser General Public License for more details.
//

#ifndef __INET_MPLSPACKET_H
#define __INET_MPLSPACKET_H

#include <stack>
#include <omnetpp.h>
#include "INETDefs.h"

class INET_API MPLSPacket: public cPacket
{
  protected:
    typedef std::vector<int> LabelStack; // note: last element is the top of stack
    LabelStack labels;

  public:
    /* constructors*/
    MPLSPacket(const char *name=NULL);
    MPLSPacket(const MPLSPacket &p);

    /* assignment operator*/
    virtual MPLSPacket& operator=(const MPLSPacket& p);

    virtual MPLSPacket *dup() const {return new MPLSPacket(*this);}

    virtual std::string info() const;

    inline void swapLabel(int newLabel)  {labels.back()=newLabel;}

    inline void pushLabel(int newLabel)  {labels.push_back(newLabel);addBitLength(32);}

    inline void popLabel()  {labels.pop_back();addBitLength(-32);}

    inline bool hasLabel()  {return !labels.empty();}

    inline int getTopLabel()  {return labels.back();}
};

#endif