tcp-htcp.h

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * 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  http://wiki.ittc.ku.edu/resilinets
 * 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 "ns3/tcp-congestion-ops.h"
#include "ns3/traced-value.h"
#include "ns3/sequence-number.h"

namespace ns3 {

class TcpHtcp : public TcpNewReno
{
public:
  static TypeId GetTypeId (void);
  TcpHtcp (void);
  TcpHtcp (const TcpHtcp& sock);
  virtual ~TcpHtcp (void);
  virtual std::string GetName () const;
  virtual Ptr<TcpCongestionOps> Fork ();
  virtual uint32_t GetSsThresh (Ptr<const TcpSocketState> tcb,
                                uint32_t bytesInFlight);

  virtual void PktsAcked (Ptr<TcpSocketState> tcb, uint32_t segmentsAcked,
                          const Time &rtt);

protected:
  virtual void CongestionAvoidance (Ptr<TcpSocketState> tcb,
                                    uint32_t segmentsAcked);

private:
  void UpdateAlpha (void);

  void UpdateBeta (void);

  // 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 */