CSMAMacLayer.h

/* -*- mode:c++ -*- ********************************************************
 * file:        CSMAMacLayer.h
 *
 * author:      Marc Loebbers, Yosia Hadisusanto
 *
 * copyright:   (C) 2004 Telecommunication Networks Group (TKN) at
 *              Technische Universitaet Berlin, Germany.
 *
 *              This program is free software; you can redistribute it
 *              and/or modify it under the terms of the GNU General Public
 *              License as published by the Free Software Foundation; either
 *              version 2 of the License, or (at your option) any later
 *              version.
 *              For further information see file COPYING
 *              in the top level directory
 ***************************************************************************
 * part of:     framework implementation developed by tkn
 ***************************************************************************/


#ifndef CSMAMAC_LAYER_H
#define CSMAMAC_LAYER_H

#include <list>
#include <ActiveChannel.h>
#include <RadioState.h>
#include <RSSI.h>
#include <Bitrate.h>
#include <DroppedPacket.h>
#include <BasicMacLayer.h>
#include <Blackboard.h>
#include <MacPkt_m.h>
#include <SingleChannelRadio.h>
#include <SimpleAddress.h>


class  CSMAMacLayer : public BasicMacLayer
{
  public:
    Module_Class_Members(CSMAMacLayer, BasicMacLayer, 0);

    virtual void initialize(int);

    virtual void finish();

    virtual void handleLowerMsg(cMessage*);

    virtual void handleUpperMsg(cMessage*);

    virtual void handleSelfMsg(cMessage*);

    virtual void handleLowerControl(cMessage *msg);

    virtual void receiveBBItem(int category, const BBItem *details, int scopeModuleId);

  protected:
    typedef std::list<MacPkt*> MacQueue;
    
    enum States {
        RX, 
        CCA,
        TX,
    };

    States macState;
    
    RadioState::States radioState;
    int catRadioState;
    
    double rssi;
    int catRSSI;

    double busyRSSI;

    double slotDuration;

    double difs;

    SingleChannelRadio* radio;
    
    MacQueue macQueue;
    
    unsigned queueLength;
    
    cMessage* backoffTimer;

    cMessage* minorMsg;
    
    unsigned txAttempts;
    
    unsigned maxTxAttempts;

    double bitrate;

    unsigned initialCW;

    DroppedPacket droppedPacket;
    
    int catDroppedPacket;
    
    int nicId;
    
protected:
    virtual void scheduleBackoff();
};

#endif

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