tcp-vegas.h

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2016 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
 *
 * Author: Truc Anh N. Nguyen <annguyen@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 TCPVEGAS_H
#define TCPVEGAS_H

#include "tcp-congestion-ops.h"

namespace ns3 {

class TcpSocketState;

class TcpVegas : public TcpNewReno
{
public:
  static TypeId GetTypeId (void);

  TcpVegas (void);

  TcpVegas (const TcpVegas& sock);
  virtual ~TcpVegas (void);

  virtual std::string GetName () const;

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

  virtual void CongestionStateSet (Ptr<TcpSocketState> tcb,
                                   const TcpSocketState::TcpCongState_t newState);

  virtual void IncreaseWindow (Ptr<TcpSocketState> tcb, uint32_t segmentsAcked);

  virtual uint32_t GetSsThresh (Ptr<const TcpSocketState> tcb,
                                uint32_t bytesInFlight);

  virtual Ptr<TcpCongestionOps> Fork ();

protected:
private:
  void EnableVegas (Ptr<TcpSocketState> tcb);

  void DisableVegas ();

private:
  uint32_t m_alpha;                  
  uint32_t m_beta;                   
  uint32_t m_gamma;                  
  Time m_baseRtt;                    
  Time m_minRtt;                     
  uint32_t m_cntRtt;                 
  bool m_doingVegasNow;              
  SequenceNumber32 m_begSndNxt;      
};

} // namespace ns3

#endif // TCPVEGAS_H