tcp-htcp.h

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/*
 * Copyright (c) 2015 ResiliNets, ITTC, University of Kansas
 *
 * 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
 *
 * by: Amir Modarresi <amodarresi@ittc.ku.edu>
 *
 * James P.G. Sterbenz <jpgs@ittc.ku.edu>, director
 * ResiliNets Research Group  https://resilinets.org/
 * Information and Telecommunication Technology Center (ITTC)
 * and Department of Electrical Engineering and Computer Science
 * The University of Kansas Lawrence, KS USA.
 */
 
#ifndef TCP_HTCP_H
#define TCP_HTCP_H
 
#include "tcp-congestion-ops.h"
 
namespace ns3
{
 
class TcpSocketState;
 
class TcpHtcp : public TcpNewReno
{
  public:
    static TypeId GetTypeId();
    TcpHtcp();
    TcpHtcp(const TcpHtcp& sock);
    ~TcpHtcp() override;
    std::string GetName() const override;
    Ptr<TcpCongestionOps> Fork() override;
    uint32_t GetSsThresh(Ptr<const TcpSocketState> tcb, uint32_t bytesInFlight) override;
 
    void PktsAcked(Ptr<TcpSocketState> tcb, uint32_t segmentsAcked, const Time& rtt) override;
 
  protected:
    void CongestionAvoidance(Ptr<TcpSocketState> tcb, uint32_t segmentsAcked) override;
 
  private:
    void UpdateAlpha();
 
    void UpdateBeta();
 
    // h-tcp variables
    double m_alpha;           
    double m_beta;            
    double m_defaultBackoff;  
    double m_throughputRatio; 
    Time m_delta;             
                              // last congestion event experienced by a flow
    Time m_deltaL;         
    Time m_lastCon;        
    Time m_minRtt;         
    Time m_maxRtt;         
    uint32_t m_throughput; 
    uint32_t m_lastThroughput; 
    uint32_t m_dataSent;       
};
 
} // namespace ns3
 
#endif /* TCP_HTCP_H */