/* -*- 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

 *

 */

#include "tcp-general-test.h"

#include "ns3/node.h"

#include "ns3/log.h"

namespace ns3 {

NS_LOG_COMPONENT_DEFINE ("TcpDatSentCbTest");

/**

 * \brief Socket that the 50% of the times saves the entire packet in the buffer,

 * while in the other 50% saves only half the packet.

 */

class TcpSocketHalfAck : public TcpSocketMsgBase

{

public:

  static TypeId GetTypeId (void);

  TcpSocketHalfAck () : TcpSocketMsgBase ()

  {

  }

  TcpSocketHalfAck (const TcpSocketHalfAck &other) : TcpSocketMsgBase (other)

  {

  }

protected:

  virtual Ptr<TcpSocketBase> Fork ();

  virtual void ReceivedData (Ptr<Packet> packet, const TcpHeader& tcpHeader);

};

NS_OBJECT_ENSURE_REGISTERED (TcpSocketHalfAck);

TypeId

TcpSocketHalfAck::GetTypeId (void)

{

  static TypeId tid = TypeId ("ns3::TcpSocketHalfAck")

    .SetParent<TcpSocketMsgBase> ()

    .SetGroupName ("Internet")

    .AddConstructor<TcpSocketHalfAck> ()

  ;

  return tid;

}

Ptr<TcpSocketBase>

TcpSocketHalfAck::Fork (void)

{

  return CopyObject<TcpSocketHalfAck> (this);

}

void

TcpSocketHalfAck::ReceivedData(Ptr<Packet> packet, const TcpHeader &tcpHeader)

{

  NS_LOG_FUNCTION (this << packet << tcpHeader);

  static uint32_t times = 1;

  Ptr<Packet> halved = packet->Copy ();

  if (times % 2 == 0)

    halved->RemoveAtEnd (packet->GetSize() / 2);

  times++;

  TcpSocketMsgBase::ReceivedData (halved, tcpHeader);

}

/**

 * \brief Data Sent callback test

 *

 * The rationale of this test is to check if the dataSent callback advertises

 * to the application all the transmitted bytes. We know in advance how many

 * bytes are being transmitted, and we check if the amount of data notified

 * equals this value.

 *

 */

class TcpDataSentCbTestCase : public TcpGeneralTest

{

public:

  TcpDataSentCbTestCase (const std::string &desc, uint32_t size, uint32_t packets) :

    TcpGeneralTest (desc, size, packets),

    m_notifiedData (0)

  { }

protected:

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

  virtual void DataSent (uint32_t size, SocketWho who);

  virtual void FinalChecks ();

private:

  uint32_t m_notifiedData;

};

void

TcpDataSentCbTestCase::DataSent (uint32_t size, SocketWho who)

{

  NS_LOG_FUNCTION (this << who << size);

  m_notifiedData += size;

}

void

TcpDataSentCbTestCase::FinalChecks()

{

  NS_TEST_ASSERT_MSG_EQ (m_notifiedData, GetPktSize () * GetPktCount () ,

                         "Notified more data than application sent");

}

Ptr<TcpSocketMsgBase>

TcpDataSentCbTestCase::CreateReceiverSocket (Ptr<Node> node)

{

  NS_LOG_FUNCTION (this);

  return CreateSocket (node, TcpSocketHalfAck::GetTypeId (), m_congControlTypeId);

}

static class TcpDataSentCbTestSuite : public TestSuite

{

public:

  TcpDataSentCbTestSuite ()

    : TestSuite ("tcp-datasentcb", UNIT)

  {

    AddTestCase (new TcpDataSentCbTestCase ("Check the data sent callback", 500, 10), TestCase::QUICK);

    AddTestCase (new TcpDataSentCbTestCase ("Check the data sent callback", 100, 100), TestCase::QUICK);

    AddTestCase (new TcpDataSentCbTestCase ("Check the data sent callback", 1000, 50), TestCase::QUICK);

    AddTestCase (new TcpDataSentCbTestCase ("Check the data sent callback", 855, 18), TestCase::QUICK);

    AddTestCase (new TcpDataSentCbTestCase ("Check the data sent callback", 1243, 59), TestCase::QUICK);

  }

} g_tcpDataSentCbTestSuite;

} // namespace ns3

  m_senderSocket->SetDataSentCallback(MakeCallback (&TcpGeneralTest::DataSentCb, this));

TcpGeneralTest::DataSentCb (Ptr<Socket> socket, uint32_t size)

{

  if (socket->GetNode () == m_receiverSocket->GetNode ())

    {

      DataSent (size, RECEIVER);

    }

  else if (socket->GetNode () == m_senderSocket->GetNode ())

    {

      DataSent (size, SENDER);

    }

  else

    {

      NS_FATAL_ERROR ("Closed socket, but not recognized");

    }

}

void

   * \brief Notifying application for sent data

   *

   * \param size the amount of bytes transmitted

   * \param who where the RTO has expired (SENDER or RECEIVER)

   */

  virtual void DataSent (uint32_t size, SocketWho who)

  {

  }

  /**

  void DataSentCb     (Ptr<Socket> socket, uint32_t size);

        'test/tcp-datasentcb-test.cc',