4.cc

#include <string>
#include <fstream>
#include "ns3/core-module.h"
#include "ns3/point-to-point-module.h"
#include "ns3/internet-module.h"
#include "ns3/applications-module.h"
#include "ns3/network-module.h"
#include "ns3/packet-sink.h"
#include "ns3/netanim-module.h"

using namespace ns3;
int
main (int argc, char *argv[])
{


 uint32_t maxBytes = 0;
NodeContainer nodes;
 nodes.Create (2);
PointToPointHelper pointToPoint;
  pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("500Kbps"));
  pointToPoint.SetChannelAttribute ("Delay", StringValue ("5ms"));
NetDeviceContainer devices;
  devices = pointToPoint.Install (nodes);
InternetStackHelper internet;
 internet.Install (nodes);
Ipv4AddressHelper ipv4;
 ipv4.SetBase ("10.1.1.0", "255.255.255.0");
 Ipv4InterfaceContainer i = ipv4.Assign (devices);
uint16_t port = 9;  // well-known echo port number
 BulkSendHelper source ("ns3::TcpSocketFactory",
 InetSocketAddress (i.GetAddress (1), port));
  source.SetAttribute ("MaxBytes", UintegerValue (maxBytes));
  ApplicationContainer sourceApps = source.Install (nodes.Get (0));
  sourceApps.Start (Seconds (0.0));
  sourceApps.Stop (Seconds (10.0));
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));
Simulator::Stop (Seconds (10.0));
AnimationInterface anim ("fourth.xml"); 
anim.EnablePacketMetadata(true);
 Simulator::Run ();
  Simulator::Destroy ();
  

  }