/* -*- 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

  */

 #include "ns3/core-module.h"

 #include "ns3/simulator-module.h"

 #include "ns3/node-module.h"

 #include "ns3/helper-module.h"

 using namespace ns3;

 NS_LOG_COMPONENT_DEFINE ("FirstScriptExample");

   int 

 main (int argc, char *argv[])

 {

   LogComponentEnable("UdpEchoClientApplication", LOG_LEVEL_INFO);

   LogComponentEnable("UdpEchoServerApplication", LOG_LEVEL_INFO);

   NodeContainer nodes;

   nodes.Create (2);

   PointToPointHelper pointToPoint;

   pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));

   pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));

   NetDeviceContainer devices;

   devices = pointToPoint.Install (nodes);

   InternetStackHelper stack;

   stack.Install (nodes);

   Ipv4AddressHelper address;

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

   Ipv4InterfaceContainer interfaces = address.Assign (devices);

   UdpEchoServerHelper echoServer (9);

   ApplicationContainer serverApps = echoServer.Install (nodes.Get (1));

   serverApps.Start (Seconds (1.0));

   serverApps.Stop (Seconds (10.0));

   UdpEchoClientHelper echoClient (interfaces.GetAddress (1), 9);

   echoClient.SetAttribute ("MaxPackets", UintegerValue (2));

   echoClient.SetAttribute ("Interval", TimeValue (Seconds (1.)));

   echoClient.SetAttribute ("PacketSize", UintegerValue (1024));

   ApplicationContainer clientApps = echoClient.Install (nodes.Get (0));

   clientApps.Start (Seconds (2.0));

   clientApps.Stop (Seconds (10.0));

   PointToPointHelper::EnablePcapAll ("netfilter");

   Simulator::Run ();

   Simulator::Destroy ();

   return 0;

 }