/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

/*

 * 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

 *

 */

//

// Network topology

//

//           10Mb/s, 10ms       10Mb/s, 10ms

//       n0-----------------n1-----------------n2

//

//

// - Tracing of queues and packet receptions to file 

//   "tcp-large-transfer.tr"

// - pcap traces also generated in the following files

//   "tcp-large-transfer.pcap-$n-$i" where n and i represent node and interface numbers respectively

//  Usage (e.g.): ./waf --run tcp-large-transfer

#include <ctype.h>

#include <iostream>

#include <fstream>

#include <string>

#include <cassert>

#include "ns3/ascii-trace.h"

#include "ns3/pcap-trace.h"

using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("TcpLargeTransfer");

void 

ApplicationTraceSink (Ptr<const Packet> packet,

                      const Address &addr)

{

// g_log is not declared in optimized builds

// should convert this to use of some other flag than the logging system

#ifdef NS3_LOG_ENABLE

  if (!g_log.IsNoneEnabled ()) {

    if (InetSocketAddress::IsMatchingType (addr) )

      {

      InetSocketAddress address = InetSocketAddress::ConvertFrom (addr);

        std::cout << "PacketSink received size " << 

        packet->GetSize () << " at time " << 

        Simulator::Now ().GetSeconds () << " from address: " << 

        address.GetIpv4 () << std::endl;

        char buf[2000]; 

        memcpy(buf, packet->PeekData (), packet->GetSize ());

        for (uint32_t i=0; i < packet->GetSize (); i++)

          {

            std::cout << buf[i];

            if (i && i % 60 == 0) 

              std::cout << std::endl; 

          }

        std::cout << std::endl << std::endl;

    }

  }

#endif

}

void CloseConnection (Ptr<Socket> localSocket)

{

  //localSocket->Close ();

}

void StartFlow(Ptr<Socket> localSocket, uint32_t nBytes, 

{

 // NS_LOG_LOGIC("Starting flow at time " <<  Simulator::Now ().GetSeconds ());

  localSocket->SetConnectCallback (MakeCallback (&CloseConnection),

                                   Callback<void, Ptr<Socket> > (),

                                   Callback<void, Ptr<Socket> > ());

  //we want to close as soon as the connection is established

  //the tcp state machine and outgoing buffer will assure that

  //all of the data is delivered

  // Perform series of 1040 byte writes (this is a multiple of 26 since

  // we want to detect data splicing in the output stream)

  uint32_t writeSize = 1040;

  uint8_t data[writeSize];

  while (nBytes > 0) {

    uint32_t curSize= nBytes > writeSize ? writeSize : nBytes;

    for(uint32_t i = 0; i < curSize; ++i)

    {

      char m = toascii (97 + i % 26);

      data[i] = m;

    }

    localSocket->Send (data, curSize);

    nBytes -= curSize;

  }

}

int main (int argc, char *argv[])

{

  // Users may find it convenient to turn on explicit debugging

  // for selected modules; the below lines suggest how to do this

  // Allow the user to override any of the defaults and the above

  // Bind()s at run-time, via command-line arguments

  CommandLine cmd;

  cmd.Parse (argc, argv);

  // We create the channels first without any IP addressing information

  ///////////////////////////////////////////////////////////////////////////

  // Simulation 1

  // 

  // Send 2000000 bytes over a connection to server port 50000 at time 0

  // Should observe SYN exchange, a lot of data segments, and FIN exchange

  //

  ///////////////////////////////////////////////////////////////////////////

  int nBytes = 2000000;

  uint16_t servPort = 50000;

  Ptr<SocketFactory> socketFactory = 

  Ptr<Socket> localSocket = socketFactory->CreateSocket ();

  localSocket->Bind ();

  // Configure tracing of all enqueue, dequeue, and NetDevice receive events

  // Trace output will be sent to the simple-examples.tr file

  AsciiTrace asciitrace ("tcp-large-transfer.tr");

  asciitrace.TraceAllQueues ();

  asciitrace.TraceAllNetDeviceRx ();

  // Also configure some tcpdump traces; each interface will be traced

  // The output files will be named 

  // simple-examples.pcap-<nodeId>-<interfaceId>

  // and can be read by the "tcpdump -r" command (use "-tt" option to

  // display timestamps correctly)

  PcapTrace pcaptrace ("tcp-large-transfer.pcap");

  pcaptrace.TraceAllIp ();

  Config::ConnectWithoutContext ("/NodeList/*/ApplicationList/*/Rx", 

                   MakeCallback (&ApplicationTraceSink));

  Simulator::StopAt (Seconds(1000));

  Simulator::Run ();

  Simulator::Destroy ();

}