TCPAlgorithm.h

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//
// Copyright (C) 2004 Andras Varga
// Copyright (C) 2009-2010 Thomas Reschka
//
// This program 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 (at your option) any later version.
//
// 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program; if not, see <http://www.gnu.org/licenses/>.
//

#ifndef __INET_TCPALGORITHM_H
#define __INET_TCPALGORITHM_H

#include <omnetpp.h>
#include "TCPConnection.h"
#include "TCPSegment.h"



class INET_API TCPAlgorithm : public cPolymorphic
{
  protected:
    TCPConnection *conn; // we belong to this connection
    TCPStateVariables *state; // our state variables

    virtual TCPStateVariables *createStateVariables() = 0;

  public:
    TCPAlgorithm() {state = NULL; conn = NULL;}

    virtual ~TCPAlgorithm() {}

    void setConnection(TCPConnection *_conn) {conn = _conn;}

    TCPStateVariables *getStateVariables() {
        if (!state) state = createStateVariables();
        return state;
    }

    virtual void initialize() {}

    virtual void established(bool active) = 0;

    virtual void connectionClosed() = 0;

    virtual void processTimer(cMessage *timer, TCPEventCode& event) = 0;

    virtual void sendCommandInvoked() = 0;

    virtual void receivedOutOfOrderSegment() = 0;

    virtual void receiveSeqChanged() = 0;

    virtual void receivedDataAck(uint32 firstSeqAcked) = 0;

    virtual void receivedDuplicateAck() = 0;

    virtual void receivedAckForDataNotYetSent(uint32 seq) = 0;

    virtual void ackSent() = 0;

    virtual void dataSent(uint32 fromseq) = 0;

    virtual void restartRexmitTimer() = 0;

    virtual void rttMeasurementCompleteUsingTS(uint32 echoedTS) = 0;

};

#endif