/* -*- 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

 *

 * ns-2 simple.tcl script (ported from ns-2)

 * Originally authored by Steve McCanne, 12/19/1996

 */

// Port of ns-2/tcl/ex/simple.tcl to ns-3

//

// Network topology

//

//  n0

//     \ 5 Mb/s, 2ms

//      \          1.5Mb/s, 10ms

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

//      /

//     / 5 Mb/s, 2ms

//   n1

//

// - all links are p2p links with indicated one-way BW/delay

// - CBR/UDP flows from n0 to n3, and from n3 to n1

// - FTP/TCP flow from n0 to n3, starting at time 1.2 to time 1.35 sec.

// - UDP packet size of 210 bytes, with per-packet interval 0.00375 sec.

//   (i.e., DataRate of 448,000 bps)

// - DropTail queues 

// - Tracing of queues and packet receptions to file "simple-p2p.tr"

#include <iostream>

#include <fstream>

#include <string>

#include <cassert>

#include "ns3/debug.h"

#include "ns3/simulator.h"

#include "ns3/nstime.h"

#include "ns3/data-rate.h"

#include "ns3/ascii-trace.h"

#include "ns3/pcap-trace.h"

#include "ns3/internet-node.h"

#include "ns3/p2p-channel.h"

#include "ns3/p2p-net-device.h"

#include "ns3/mac-address.h"

#include "ns3/ipv4-address.h"

#include "ns3/ipv4.h"

#include "ns3/udp.h"

#include "ns3/socket.h"

#include "ns3/ipv4-route.h"

#include "ns3/drop-tail.h"

#include "ns3/node-list.h"

#include "ns3/trace-root.h"

#include "ns3/p2p-topology.h"

#include "ns3/onoff-application.h"

#include "ns3/application-list.h"

#include "ns3/random-variable.h"

using namespace ns3;

int main (int argc, char *argv[])

{

#if 0

  DebugComponentEnable("Object");

  DebugComponentEnable("Queue");

  DebugComponentEnable("DropTailQueue");

  DebugComponentEnable("Channel");

  DebugComponentEnable("PointToPointChannel");

  DebugComponentEnable("PointToPointNetDevice");

#endif

  // Optionally, specify some default values for Queue objects.

  // For this example, we specify that we want each queue to

  // be a DropTail queue, with a limit of 30 packets.

  // Specify DropTail for default queue type (note. this is actually

  // the default, but included here as an example).

  Queue::Default(DropTailQueue());

  // Specify limit of 30 in units of packets (not implemented).

  //  Queue::Default().SetLimitPackets(30);

  Node* n0 = new InternetNode ();

  Node* n1 = new InternetNode (); 

  Node* n2 = new InternetNode (); 

  Node* n3 = new InternetNode ();

  PointToPointChannel *channel0 = 

    PointToPointTopology::AddPointToPointLink (

      n0, Ipv4Address("10.1.1.1"), 

      n2, Ipv4Address("10.1.1.2"), 

      DataRate(5000000), MilliSeconds(2));

  channel0->Unref ();

  PointToPointChannel *channel1 = 

    PointToPointTopology::AddPointToPointLink (

      n1, Ipv4Address("10.1.2.1"), 

      n2, Ipv4Address("10.1.2.2"), 

      DataRate(5000000), MilliSeconds(2));

  channel1->Unref ();

  PointToPointChannel *channel2 = 

    PointToPointTopology::AddPointToPointLink (

      n2, Ipv4Address("10.1.3.1"), 

      n3, Ipv4Address("10.1.3.2"), 

      DataRate(1500000), MilliSeconds(10));

  channel2->Unref ();

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

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

  OnOffApplication* ooff0 = new OnOffApplication(

    Ipv4Address("10.1.3.2"), 

    80, 

    ConstantVariable(1), 

    ConstantVariable(0), 

    DataRate(448000), 

    210);

  // Add to Node's ApplicationList (takes ownership of pointer)

  n0->GetApplicationList()->Add(ooff0);

  // Start the application

  ooff0->Start(Seconds(1.0));

  ooff0->Stop (Seconds(10.0));

  // Create a similar flow from n3 to n1, starting at time 1.1 seconds

  OnOffApplication* ooff1 = new OnOffApplication(

    Ipv4Address("10.1.2.1"), 

    80, 

    ConstantVariable(1), 

    ConstantVariable(0), 

    DataRate(448000), 

    210);

  // Add to Node's ApplicationList (takes ownership of pointer)

  n3->GetApplicationList()->Add(ooff1);

  // Start the application

  ooff1->Start(Seconds(1.1));

  ooff1->Stop (Seconds(10.0));

  // Here, finish off packet routing configuration

  // This will likely set by some global StaticRouting object in the future

  n0->GetIpv4()->SetDefaultRoute (Ipv4Address ("10.1.1.2"), 1);

  n3->GetIpv4()->SetDefaultRoute (Ipv4Address ("10.1.3.1"), 1);

  n0->Unref ();

  n1->Unref ();

  n2->Unref ();

  n3->Unref ();

  // Configure tracing of all enqueue, dequeue, and NetDevice receive events

  // Trace output will be sent to the simple-p2p.tr file

#if 1

  AsciiTrace trace ("simple-p2p.tr");

  trace.TraceAllQueues ();

  trace.TraceAllNetDeviceRx ();

#else

  PcapTrace trace ("simple-p2p.tr");

  trace.TraceAllIp ();

#endif

  Simulator::Run ();

  Simulator::Destroy ();

}