LIBTable.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_LIBTABLE_H
#define __INET_LIBTABLE_H

#include <omnetpp.h>
#include <vector>
#include <string>
#include "ConstType.h"
#include "IPAddress.h"
#include "IPDatagram.h"

// label operations
#define PUSH_OPER              0
#define SWAP_OPER              1
#define POP_OPER               2

struct LabelOp
{
    int label;
    int optcode;
};

typedef std::vector<LabelOp> LabelOpVector;

class INET_API LIBTable: public cSimpleModule
{
    public:
        struct LIBEntry
        {
            int inLabel;
            std::string inInterface;

            LabelOpVector outLabel;
            std::string outInterface;

            // FIXME colors in nam, temporary solution
            int color;
        };

    protected:
        IPAddress routerId;
        int maxLabel;
        std::vector<LIBEntry> lib;

    protected:
        virtual void initialize(int stage);
        virtual int numInitStages() const  {return 5;}
        virtual void handleMessage(cMessage *msg);

        // static configuration
        virtual void readTableFromXML(const cXMLElement* libtable);

    public:
        // label management
        virtual bool resolveLabel(std::string inInterface, int inLabel,
                          LabelOpVector& outLabel, std::string& outInterface, int& color);

        virtual int installLibEntry(int inLabel, std::string inInterface, const LabelOpVector& outLabel,
                            std::string outInterface, int color);

        virtual void removeLibEntry(int inLabel);

        // utility
        static LabelOpVector pushLabel(int label);
        static LabelOpVector swapLabel(int label);
        static LabelOpVector popLabel();
};

std::ostream & operator<<(std::ostream & os, const LIBTable::LIBEntry & lib);
std::ostream & operator<<(std::ostream & os, const LabelOpVector& label);

#endif