tcp-rx-buffer.h

Go to the documentation of this file.

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2010 Adrian Sai-wah Tam
 *
 * 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: Adrian Sai-wah Tam <adrian.sw.tam@gmail.com>
 */

#ifndef TCP_RX_BUFFER_H
#define TCP_RX_BUFFER_H

#include <map>
#include "ns3/traced-value.h"
#include "ns3/trace-source-accessor.h"
#include "ns3/sequence-number.h"
#include "ns3/ptr.h"
#include "ns3/tcp-header.h"
#include "ns3/tcp-option-sack.h"

namespace ns3 {
class Packet;

class TcpRxBuffer : public Object
{
public:
  static TypeId GetTypeId (void);
  TcpRxBuffer (uint32_t n = 0);
  virtual ~TcpRxBuffer ();

  // Accessors
  SequenceNumber32 NextRxSequence (void) const;
  SequenceNumber32 MaxRxSequence (void) const;
  void IncNextRxSequence (void);
  void SetNextRxSequence (const SequenceNumber32& s);
  void SetFinSequence (const SequenceNumber32& s);
  uint32_t MaxBufferSize (void) const;
  void SetMaxBufferSize (uint32_t s);
  uint32_t Size (void) const;
  uint32_t Available () const;
  bool Finished (void);

  bool Add (Ptr<Packet> p, TcpHeader const& tcph);

  Ptr<Packet> Extract (uint32_t maxSize);

  TcpOptionSack::SackList GetSackList () const;

  uint32_t GetSackListSize () const;

  bool GotFin () const { return m_gotFin; }

private:
  void UpdateSackList (const SequenceNumber32 &head, const SequenceNumber32 &tail);

  void ClearSackList (const SequenceNumber32 &seq);

  TcpOptionSack::SackList m_sackList; 

  typedef std::map<SequenceNumber32, Ptr<Packet> >::iterator BufIterator;
  TracedValue<SequenceNumber32> m_nextRxSeq; 
  SequenceNumber32 m_finSeq;                 
  bool m_gotFin;                             
  uint32_t m_size;                           
  uint32_t m_maxBuffer;                      
  uint32_t m_availBytes;                     
  std::map<SequenceNumber32, Ptr<Packet> > m_data; 
};

} //namespace ns3

#endif /* TCP_RX_BUFFER_H */