/* -*- 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

 *

 */

// This script exercises global routing code in a mixed point-to-point

// and csma/cd environment

//

// Network topology

//

//  n0

//     \ p-p

//      \          (shared csma/cd)

//       n2 -------------------------n3

//      /            |        | 

//     / p-p        n4        n5 ---------- n6

//   n1                             p-p

//

// - CBR/UDP flows from n0 to n6

// - Tracing of queues and packet receptions to file "mixed-global-routing.tr"

#include <iostream>

#include <fstream>

#include <string>

#include <cassert>

#include "ns3/core-module.h"

#include "ns3/simulator-module.h"

#include "ns3/node-module.h"

#include "ns3/helper-module.h"

#include "ns3/global-route-manager.h"

using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("MixedGlobalRoutingExample");

int 

main (int argc, char *argv[])

{

  Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (210));

  Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("448kb/s"));

  // Allow the user to override any of the defaults and the above

  // Bind ()s at run-time, via command-line arguments

  CommandLine cmd;

  cmd.Parse (argc, argv);

  NS_LOG_INFO ("Create nodes.");

  NodeContainer c;

  c.Create (7);

  NodeContainer n0n2 = NodeContainer (c.Get (0), c.Get (2));

  NodeContainer n1n2 = NodeContainer (c.Get (1), c.Get (2));

  NodeContainer n5n6 = NodeContainer (c.Get (5), c.Get (6));

  NodeContainer n2345 = NodeContainer (c.Get (2), c.Get (3), c.Get (4), c.Get (5));

  InternetStackHelper internet;

  internet.Install (c);

  // We create the channels first without any IP addressing information

  NS_LOG_INFO ("Create channels.");

  PointToPointHelper p2p;

  p2p.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));

  p2p.SetChannelAttribute ("Delay", StringValue ("2ms"));

  NetDeviceContainer d0d2 = p2p.Install (n0n2);

  NetDeviceContainer d1d2 = p2p.Install (n1n2);

  p2p.SetDeviceAttribute ("DataRate", StringValue ("1500kbps"));

  p2p.SetChannelAttribute ("Delay", StringValue ("10ms"));

  NetDeviceContainer d5d6 = p2p.Install (n5n6);

  // We create the channels first without any IP addressing information

  CsmaHelper csma;

  csma.SetChannelAttribute ("DataRate", StringValue ("5Mbps"));

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

  NetDeviceContainer d2345 = csma.Install (n2345);

  // Later, we add IP addresses.  

  NS_LOG_INFO ("Assign IP Addresses.");

  Ipv4AddressHelper ipv4;

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

  ipv4.Assign (d0d2);

  ipv4.SetBase ("10.1.2.0", "255.255.255.0");

  ipv4.Assign (d1d2);

  ipv4.SetBase ("10.1.3.0", "255.255.255.0");

  Ipv4InterfaceContainer i5i6 = ipv4.Assign (d5d6);

  ipv4.SetBase ("10.250.1.0", "255.255.255.0");

  ipv4.Assign (d2345);

  // Create router nodes, initialize routing database and set up the routing

  // tables in the nodes.

  GlobalRouteManager::PopulateRoutingTables ();

  // Create the OnOff application to send UDP datagrams of size

  // 210 bytes at a rate of 448 Kb/s

  NS_LOG_INFO ("Create Applications.");

  uint16_t port = 9;   // Discard port (RFC 863)

  OnOffHelper onoff ("ns3::UdpSocketFactory",

                     InetSocketAddress (i5i6.GetAddress (1), port));

  onoff.SetAttribute ("OnTime", RandomVariableValue (ConstantVariable (1)));

  onoff.SetAttribute ("OffTime", RandomVariableValue (ConstantVariable (0)));

  onoff.SetAttribute ("DataRate", StringValue ("300bps"));

  onoff.SetAttribute ("PacketSize", UintegerValue (50));

  ApplicationContainer apps = onoff.Install (c.Get (0));

  apps.Start (Seconds (1.0));

  apps.Stop (Seconds (10.0));

  std::ofstream ascii;

  ascii.open ("mixed-global-routing.tr");

  PointToPointHelper::EnablePcapAll ("mixed-global-routing");

  PointToPointHelper::EnableAsciiAll (ascii);

  CsmaHelper::EnablePcapAll ("mixed-global-routing");

  CsmaHelper::EnableAsciiAll (ascii);

  NS_LOG_INFO ("Run Simulation.");

  Simulator::Run ();

  Simulator::Destroy ();

  NS_LOG_INFO ("Done.");

}