/* -*- 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

//

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

//            500 Kbps

//             5 ms

//

// - Flow from n0 to n1 using BulkSendApplication.

// - Tracing of queues and packet receptions to file "tcp-bulk-send.tr"

//   and pcap tracing available when tracing is turned on.

#include <string>

#include <fstream>

#include "ns3/core-module.h"

#include "ns3/helper-module.h"

#include "ns3/node-module.h"

#include "ns3/packet-sink.h"

using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("TcpBulkSendExample");

int

main (int argc, char *argv[])

{

  bool tracing = false;

  uint32_t maxBytes = 0;

//

// Allow the user to override any of the defaults at

// run-time, via command-line arguments

//

  CommandLine cmd;

  cmd.AddValue ("tracing", "Flag to enable/disable tracing", tracing);

  cmd.AddValue ("maxBytes",

                "Total number of bytes for application to send", maxBytes);

  cmd.Parse (argc, argv);

//

// Explicitly create the nodes required by the topology (shown above).

//

  NS_LOG_INFO ("Create nodes.");

  NodeContainer nodes;

  nodes.Create (2);

  NS_LOG_INFO ("Create channels.");

//

// Explicitly create the point-to-point link required by the topology (shown above).

//

  PointToPointHelper pointToPoint;

  pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("500Kbps"));

  pointToPoint.SetChannelAttribute ("Delay", StringValue ("5ms"));

  NetDeviceContainer devices;

  devices = pointToPoint.Install (nodes);

//

// Install the internet stack on the nodes

//

  InternetStackHelper internet;

  internet.Install (nodes);

//

// We've got the "hardware" in place.  Now we need to add IP addresses.

//

  NS_LOG_INFO ("Assign IP Addresses.");

  Ipv4AddressHelper ipv4;

  ipv4.SetBase ("10.1.1.0", "255.255.255.0");

  Ipv4InterfaceContainer i = ipv4.Assign (devices);

  NS_LOG_INFO ("Create Applications.");

//

// Create a BulkSendApplication and install it on node 0

//

  uint16_t port = 9;  // well-known echo port number

  BulkSendHelper source ("ns3::TcpSocketFactory",

                         InetSocketAddress (i.GetAddress (1), port));

  // Set the amount of data to send in bytes.  Zero is unlimited.

  source.SetAttribute ("MaxBytes", UintegerValue (maxBytes));

  ApplicationContainer sourceApps = source.Install (nodes.Get (0));

  sourceApps.Start (Seconds (0.0));

  sourceApps.Stop (Seconds (10.0));

//

// Create a PacketSinkApplication and install it on node 1

//

  PacketSinkHelper sink ("ns3::TcpSocketFactory",

                         InetSocketAddress (Ipv4Address::GetAny (), port));

  ApplicationContainer sinkApps = sink.Install (nodes.Get (1));

  sinkApps.Start (Seconds (0.0));

  sinkApps.Stop (Seconds (10.0));

//

// Set up tracing if enabled

//

  if (tracing)

    {

      AsciiTraceHelper ascii;

      pointToPoint.EnableAsciiAll (ascii.CreateFileStream ("tcp-bulk-send.tr"));

      pointToPoint.EnablePcapAll ("tcp-bulk-send", false);

    }

//

// Now, do the actual simulation.

//

  NS_LOG_INFO ("Run Simulation.");

  Simulator::Stop (Seconds (10.0));

  Simulator::Run ();

  Simulator::Destroy ();

  NS_LOG_INFO ("Done.");

  Ptr<PacketSink> sink1 = DynamicCast<PacketSink> (sinkApps.Get (0));

  std::cout << "Total Bytes Received: " << sink1->GetTotalRx () << std::endl;

}