/* -*- 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/helper-module.h"

NS_LOG_COMPONENT_DEFINE ("UdpEchoSimulation");

using namespace ns3;

int 

main (int argc, char *argv[])

{

  LogComponentEnable ("UdpEchoSimulation", LOG_LEVEL_INFO);

  NS_LOG_INFO ("UDP Echo Simulation");

  NodeContainer n;

  n.Create (4);

  InternetStackHelper internet;

  internet.Install (n);

  CsmaHelper csma;

  csma.SetChannelParameter ("BitRate", StringValue ("5Mbps"));

  csma.SetChannelParameter ("Delay", StringValue ("2ms"));

  NetDeviceContainer nd = csma.Install (n);

  Ipv4AddressHelper ipv4;

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

  Ipv4InterfaceContainer i = ipv4.Assign (nd);

  uint16_t port = 7;

  UdpEchoClientHelper client;

  client.SetRemote (i.GetAddress (1), port);

  client.SetAppAttribute ("MaxPackets", UintegerValue (1));

  client.SetAppAttribute ("Interval", StringValue ("2s"));

  client.SetAppAttribute ("PacketSize", UintegerValue (1024));

  ApplicationContainer apps = client.Install (n.Get (0));

  apps.Start (Seconds (2.0));

  apps.Stop (Seconds (10.0));

  UdpEchoServerHelper server;

  server.SetPort (port);

  apps = server.Install (n.Get (1));

  apps.Start (Seconds (1.0));

  apps.Stop (Seconds (10.0));

  CsmaHelper::EnablePcapAll ("tutorial");

  Simulator::Run ();

  Simulator::Destroy ();

}