tcp-general-test.h

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/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2015 Natale Patriciello <natale.patriciello@gmail.com>
 *
 * 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
 *
 */
#ifndef TCPGENERALTEST_H
#define TCPGENERALTEST_H

#include "ns3/simple-net-device.h"
#include "ns3/error-model.h"
#include "ns3/tcp-socket-base.h"
#include "ns3/test.h"

namespace ns3 {

class TcpSocketMsgBase : public TcpSocketBase
{
public:
  static TypeId GetTypeId (void);

  TcpSocketMsgBase () : TcpSocketBase ()
  {
  }

  TcpSocketMsgBase (const TcpSocketMsgBase &other) : TcpSocketBase (other)
  {
    m_rcvAckCb = other.m_rcvAckCb;
    m_processedAckCb = other.m_processedAckCb;
    m_retrCallback = other.m_retrCallback;
    m_forkCb = other.m_forkCb;
  }

  typedef Callback<void, Ptr<const Packet>, const TcpHeader&,
                   Ptr<const TcpSocketBase> > AckManagementCallback;
  typedef Callback<void, Ptr<const TcpSocketState>,
                   Ptr<const TcpSocketBase> > RetrCallback;

  void SetRcvAckCb (AckManagementCallback cb);

  void SetProcessedAckCb (AckManagementCallback cb);

  void SetRetransmitCb (RetrCallback cb);

  void SetForkCb (Callback<void, Ptr<TcpSocketMsgBase> > cb);

protected:
  virtual void ReceivedAck (Ptr<Packet> packet, const TcpHeader& tcpHeader);
  virtual void Retransmit (void);
  virtual Ptr<TcpSocketBase> Fork (void);
  virtual void CompleteFork (Ptr<Packet> p, const TcpHeader& tcpHeader,
                             const Address& fromAddress, const Address& toAddress);

private:
  AckManagementCallback m_rcvAckCb;
  AckManagementCallback m_processedAckCb;
  RetrCallback m_retrCallback;
  Callback<void, Ptr<TcpSocketMsgBase> > m_forkCb;
};


class TcpSocketSmallAcks : public TcpSocketMsgBase
{
public:
  static TypeId GetTypeId (void);

  TcpSocketSmallAcks ()
    : TcpSocketMsgBase (),
    m_bytesToAck (125),
    m_bytesLeftToBeAcked (0),
    m_lastAckedSeq (1)
  {
  }

  TcpSocketSmallAcks (const TcpSocketSmallAcks &other) : TcpSocketMsgBase (other),
    m_bytesToAck (other.m_bytesToAck),
    m_bytesLeftToBeAcked (other.m_bytesLeftToBeAcked),
    m_lastAckedSeq (other.m_lastAckedSeq)
  {
  }

  void SetBytesToAck (uint32_t bytes)
  {
    m_bytesToAck = bytes;
  }

protected:
  virtual void SendEmptyPacket (uint8_t flags);
  Ptr<TcpSocketBase> Fork (void);

  uint32_t m_bytesToAck;
  uint32_t m_bytesLeftToBeAcked;
  SequenceNumber32 m_lastAckedSeq;
};

class TcpGeneralTest : public TestCase
{
public:
  TcpGeneralTest (const std::string &desc,
                  uint32_t pktSize = 500,
                  uint32_t pktCount = 10,
                  const Time& pktInterval = Seconds (0.01),
                  const Time& propagationDelay = Seconds (0.5),
                  const Time& startTime = Seconds (10),
                  uint32_t initialSlowStartThresh = 0xffff,
                  uint32_t initialCwnd = 1,
                  uint32_t segmentSize = 500,
                  TypeId   congestionControl = TcpNewReno::GetTypeId (),
                  uint32_t mtu = 1500);
  ~TcpGeneralTest ();

  enum SocketWho
  {
    SENDER,  
    RECEIVER 
  };

protected:
  virtual Ptr<SimpleChannel> CreateChannel ();

  virtual Ptr<ErrorModel> CreateSenderErrorModel ();

  virtual Ptr<ErrorModel> CreateReceiverErrorModel ();

  virtual Ptr<TcpSocketMsgBase> CreateReceiverSocket (Ptr<Node> node);

  virtual Ptr<TcpSocketMsgBase> CreateSenderSocket (Ptr<Node> node);

  virtual Ptr<TcpSocketMsgBase> CreateSocket (Ptr<Node> node, TypeId socketType,
                                              TypeId congControl);

  Ptr<TcpSocketMsgBase> GetSenderSocket ()
  {
    return m_senderSocket;
  }

  Ptr<TcpSocketMsgBase> GetReceiverSocket ()
  {
    return m_receiverSocket;
  }

  virtual void DoRun (void);

  virtual void DoTeardown (void);

  void DoConnect ();

  virtual void ReceivePacket (Ptr<Socket> socket);

  void SendPacket (Ptr<Socket> socket, uint32_t pktSize,
                   uint32_t pktCount, Time pktInterval);

  uint32_t GetSegSize (SocketWho who);

  uint32_t GetReTxThreshold (SocketWho who);

  uint32_t GetDupAckCount (SocketWho who);

  uint32_t GetDelAckCount (SocketWho who);

  Time GetDelAckTimeout (SocketWho who);

  Time GetRto (SocketWho who);

  Time GetMinRto (SocketWho who);

  Time GetConnTimeout (SocketWho who);

  Ptr<RttEstimator> GetRttEstimator (SocketWho who);

  Time GetClockGranularity (SocketWho who);

  TcpSocket::TcpStates_t GetTcpState (SocketWho who);

  Ptr<TcpSocketState> GetTcb (SocketWho who);

  uint32_t GetRWnd (SocketWho who);

  EventId GetPersistentEvent (SocketWho who);

  Time GetPersistentTimeout (SocketWho who);

  void SetRcvBufSize (SocketWho who, uint32_t size);

  virtual void CongStateTrace (const TcpSocketState::TcpCongState_t oldValue,
                              const TcpSocketState::TcpCongState_t newValue)
  {
  }

  virtual void CWndTrace (uint32_t oldValue, uint32_t newValue)
  {
  }

  virtual void NormalClose (SocketWho who)
  {
  }

  virtual void ErrorClose  (SocketWho who)
  {
  }

  virtual void QueueDrop   (SocketWho who)
  {
  }

  virtual void PhyDrop     (SocketWho who)
  {
  }

  virtual void RcvAck      (const Ptr<const TcpSocketState> tcb,
                            const TcpHeader& h, SocketWho who)
  {
  }

  virtual void ProcessedAck (const Ptr<const TcpSocketState> tcb,
                             const TcpHeader& h, SocketWho who)
  {
  }

  virtual void Tx (const Ptr<const Packet> p, const TcpHeader&h, SocketWho who);

  virtual void Rx (const Ptr<const Packet> p, const TcpHeader&h, SocketWho who);

  virtual void RTOExpired (const Ptr<const TcpSocketState> tcb, SocketWho who)
  {
  }

  virtual void FinalChecks ()
  {
  }

  Time GetPropagationDelay () const
  {
    return m_propagationDelay;
  }

  Time GetStartTime () const
  {
    return m_startTime;
  }

  uint32_t GetMtu () const
  {
    return m_mtu;
  }

  uint32_t GetPktSize () const
  {
    return m_pktSize;
  }

  uint32_t GetPktCount () const
  {
    return m_pktCount;
  }

  Time GetPktInterval () const
  {
    return m_interPacketInterval;
  }

  uint32_t GetInitialSsThresh () const
  {
    return m_initialSlowStartThresh;
  }

  uint32_t GetInitialCwnd () const
  {
    return m_initialCwnd;
  }


  TypeId   m_congControlTypeId;      

private:
  // Member variables, accessible through getters
  // giving write access to subclass can be dangerous
  Time     m_propagationDelay;     

  Time     m_startTime;            
  uint32_t m_mtu;                  

  uint32_t m_pktSize;              
  uint32_t m_pktCount;             
  Time     m_interPacketInterval;  
                                   //   down to tcp socket
  uint32_t m_initialSlowStartThresh; 
  uint32_t m_initialCwnd;            
  uint32_t m_segmentSize;            

  Ptr<TcpSocketMsgBase> m_senderSocket;   
  Ptr<TcpSocketMsgBase> m_receiverSocket; 

private:
  // De-multiplexing callbacks.
  void NormalCloseCb  (Ptr<Socket> socket);
  void ErrorCloseCb   (Ptr<Socket> socket);
  void QueueDropCb    (std::string context, Ptr<const Packet> p);
  void PhyDropCb      (std::string context, Ptr<const Packet> p);
  void RcvAckCb       (Ptr<const Packet> p, const TcpHeader& h,
                       Ptr<const TcpSocketBase> tcp);
  void ProcessedAckCb (Ptr<const Packet> p, const TcpHeader& h,
                       Ptr<const TcpSocketBase> tcp);
  void TxPacketCb     (const Ptr<const Packet> p, const TcpHeader& h,
                       const Ptr<const TcpSocketBase> tcp);
  void RxPacketCb     (const Ptr<const Packet> p, const TcpHeader& h,
                       const Ptr<const TcpSocketBase> tcp);
  void RtoExpiredCb   (const Ptr<const TcpSocketState> tcb,
                       const Ptr<const TcpSocketBase> tcp);
  void ForkCb         (Ptr<TcpSocketMsgBase> tcp);
  void HandleAccept (Ptr<Socket> socket, const Address& from);

  InetSocketAddress m_remoteAddr;
};

static inline TcpSocketState::TcpCongState_t
GetCongStateFrom (Ptr<const TcpSocketState> tcb)
{
  return tcb->m_congState.Get ();
}

} // namespace ns3

#endif // TCPGENERALTEST_H