/* -*- 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

 */

// Adaptation of examples/udp/udp-client-server.cc for

// Click based nodes.

//

// Network topology

//

//         172.16.1.0/24

//      (1.1) (1.2)  (1.3)

//        n0    n1    n2

//        |     |     |

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

//             LAN

//

// - UDP flows from n0 to n1 and n2 to n1

// - All nodes are Click based.

// - The single ethernet interface that each node

//   uses is named 'eth0' in the Click file.

//

#include <fstream>

#include "ns3/core-module.h"

#include "ns3/network-module.h"

#include "ns3/ipv4-click-routing.h"

#include "ns3/click-internet-stack-helper.h"

using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("NsclickUdpClientServerCsma");

int

main (int argc, char *argv[])

{

#ifdef NS3_CLICK

//

// Enable logging for UdpClient and

//

  LogComponentEnable ("NsclickUdpClientServerCsma", LOG_LEVEL_INFO);

//

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

//

  NS_LOG_INFO ("Create nodes.");

  NodeContainer n;

  n.Create (3);

  NS_LOG_INFO ("Create channels.");

//

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

//

  CsmaHelper csma;

  csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate(5000000)));

  csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));

  csma.SetDeviceAttribute ("Mtu", UintegerValue (1400));

  NetDeviceContainer d = csma.Install (n);

//

// Install Click on the nodes

//

  ClickInternetStackHelper clickinternet;

  clickinternet.SetClickFile (n, "src/routing/click/examples/nsclick-lan-single-interface.click");

  clickinternet.SetRoutingTableElement (n, "rt");

  clickinternet.Install (n);

  Ipv4AddressHelper ipv4;

//

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

//

  NS_LOG_INFO ("Assign IP Addresses.");

  ipv4.SetBase ("172.16.1.0", "255.255.255.0");

  Ipv4InterfaceContainer i = ipv4.Assign (d);

  NS_LOG_INFO ("Create Applications.");

//

// Create one udpServer applications on node one.

//

  uint16_t port = 4000;

  UdpServerHelper server (port);

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

  apps.Start (Seconds (1.0));

  apps.Stop (Seconds (10.0));

//

// Create one UdpClient application to send UDP datagrams from node zero to

// node one.

//

  uint32_t MaxPacketSize = 1024;

  Time interPacketInterval = Seconds (0.05);

  uint32_t maxPacketCount = 320;

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

  client.SetAttribute ("MaxPackets", UintegerValue (maxPacketCount));

  client.SetAttribute ("Interval", TimeValue (interPacketInterval));

  client.SetAttribute ("PacketSize", UintegerValue (MaxPacketSize));

  apps = client.Install (NodeContainer (n.Get (0), n.Get (2)));

  apps.Start (Seconds (2.0));

  apps.Stop (Seconds (10.0));

  csma.EnablePcap ("nsclick-udp-client-server-csma", d, false);

//

// Now, do the actual simulation.

//

  NS_LOG_INFO ("Run Simulation.");

  Simulator::Stop (Seconds(20.0));

  Simulator::Run ();

  Simulator::Destroy ();

  NS_LOG_INFO ("Done.");

#else

  NS_FATAL_ERROR ("Can't use ns-3-click without NSCLICK compiled in");

#endif

}