/* -*- 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/network-module.h"

#include "ns3/csma-module.h"

#include "ns3/internet-module.h"

#include "ns3/point-to-point-module.h"

#include "ns3/applications-module.h"

#include "ns3/ipv4-global-routing-helper.h"

// Default Network Topology

//

//       10.1.1.0

// n0 -------------- n1   n2   n3   n4

//    point-to-point  |    |    |    |

//                    ================

//                      LAN 10.1.2.0

using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("SecondScriptExample");

int 

main (int argc, char *argv[])

{

  bool verbose = true;

  uint32_t nCsma = 3;

  CommandLine cmd;

  cmd.AddValue ("nCsma", "Number of \"extra\" CSMA nodes/devices", nCsma);

  cmd.AddValue ("verbose", "Tell echo applications to log if true", verbose);

  cmd.Parse (argc,argv);

  if (verbose)

    {

      LogComponentEnable ("UdpEchoClientApplication", LOG_LEVEL_INFO);

      LogComponentEnable ("UdpEchoServerApplication", LOG_LEVEL_INFO);

    }

  nCsma = nCsma == 0 ? 1 : nCsma;

  NodeContainer p2pNodes;

  p2pNodes.Create (2);

  NodeContainer csmaNodes;

  csmaNodes.Add (p2pNodes.Get (1));

  csmaNodes.Create (nCsma);

  PointToPointHelper pointToPoint;

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

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

  NetDeviceContainer p2pDevices;

  p2pDevices = pointToPoint.Install (p2pNodes);

  CsmaHelper csma;

  csma.SetChannelAttribute ("DataRate", StringValue ("100Mbps"));

  csma.SetChannelAttribute ("Delay", TimeValue (NanoSeconds (6560)));

  NetDeviceContainer csmaDevices;

  csmaDevices = csma.Install (csmaNodes);

  InternetStackHelper stack;

  stack.Install (p2pNodes.Get (0));

  stack.Install (csmaNodes);

  Ipv4AddressHelper address;

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

  Ipv4InterfaceContainer p2pInterfaces;

  p2pInterfaces = address.Assign (p2pDevices);

  address.SetBase ("10.1.2.0", "255.255.255.0");

  Ipv4InterfaceContainer csmaInterfaces;

  csmaInterfaces = address.Assign (csmaDevices);

  UdpEchoServerHelper echoServer (9);

  ApplicationContainer serverApps = echoServer.Install (csmaNodes.Get (nCsma));

  serverApps.Start (Seconds (1.0));

  serverApps.Stop (Seconds (10.0));

  UdpEchoClientHelper echoClient (csmaInterfaces.GetAddress (nCsma), 9);

  echoClient.SetAttribute ("MaxPackets", UintegerValue (1));

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

  ApplicationContainer clientApps = echoClient.Install (p2pNodes.Get (0));

  clientApps.Start (Seconds (2.0));

  clientApps.Stop (Seconds (10.0));

  Ipv4GlobalRoutingHelper::PopulateRoutingTables ();

  pointToPoint.EnablePcapAll ("second");

  csma.EnablePcap ("second", csmaDevices.Get (1), true);

  Simulator::Run ();

  Simulator::Destroy ();

  return 0;

}