/* -*- 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

 *

 * Author: George F. Riley<riley@ece.gatech.edu>

 */

#include <iostream>

#include "ns3/core-module.h"

#include "ns3/network-module.h"

#include "ns3/helper-module.h"

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

using namespace ns3;

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

{

  Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (512));

  Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("500kb/s"));

  uint32_t    nLeftLeaf = 5;

  uint32_t    nRightLeaf = 5;

  uint32_t    nLeaf = 0; // If non-zero, number of both left and right

  uint16_t    port = 0;  // If non zero, port to bind to for anim connection

  std::string animFile;  // Name of file for animation output

  CommandLine cmd;

  cmd.AddValue ("nLeftLeaf", "Number of left side leaf nodes", nLeftLeaf);

  cmd.AddValue ("nRightLeaf","Number of right side leaf nodes", nRightLeaf);

  cmd.AddValue ("nLeaf",     "Number of left and right side leaf nodes", nLeaf);

  cmd.AddValue ("port",      "Port Number for Remote Animation", port);

  cmd.AddValue ("animFile",  "File Name for Animation Output", animFile);

  cmd.Parse (argc,argv);

  if (nLeaf > 0)

    {

      nLeftLeaf = nLeaf;

      nRightLeaf = nLeaf;

    }

  // Create the point-to-point link helpers

  PointToPointHelper pointToPointRouter;

  pointToPointRouter.SetDeviceAttribute  ("DataRate", StringValue ("10Mbps"));

  pointToPointRouter.SetChannelAttribute ("Delay", StringValue ("1ms"));

  PointToPointHelper pointToPointLeaf;

  pointToPointLeaf.SetDeviceAttribute    ("DataRate", StringValue ("10Mbps"));

  pointToPointLeaf.SetChannelAttribute   ("Delay", StringValue ("1ms"));

  PointToPointDumbbellHelper d(nLeftLeaf, pointToPointLeaf,

                   nRightLeaf, pointToPointLeaf,

                   pointToPointRouter);

  // Install Stack

  InternetStackHelper stack;

  d.InstallStack (stack);

  // Assign IP Addresses

  d.AssignIpv4Addresses (Ipv4AddressHelper ("10.1.1.0", "255.255.255.0"),

                    Ipv4AddressHelper ("10.2.1.0", "255.255.255.0"),

                    Ipv4AddressHelper ("10.3.1.0", "255.255.255.0"));

  // Install on/off app on all right side nodes

  OnOffHelper clientHelper ("ns3::UdpSocketFactory", Address ());

  clientHelper.SetAttribute 

    ("OnTime", RandomVariableValue (UniformVariable (0, 1)));

  clientHelper.SetAttribute 

    ("OffTime", RandomVariableValue (UniformVariable (0, 1)));

  ApplicationContainer clientApps;

  for (uint32_t i = 0; i < d.RightCount (); ++i)

    {

      // Create an on/off app sending packets to the same leaf right side

      AddressValue remoteAddress (InetSocketAddress (d.GetLeftIpv4Address (i), 1000));

      clientHelper.SetAttribute ("Remote", remoteAddress);

      clientApps.Add(clientHelper.Install (d.GetRight (i)));

    }

  clientApps.Start (Seconds (0.0));

  clientApps.Stop (Seconds (10.0));

  // Set the bounding box for animation

  d.BoundingBox (1, 1, 10, 10);

  // Create the animation object and configure for specified output

  AnimationInterface anim;

  if (port > 0)

    {

      anim.SetServerPort (port);

    }

  else if (!animFile.empty ())

    {

      anim.SetOutputFile (animFile);

    }

  anim.StartAnimation ();

  // Set up the acutal simulation

  Ipv4GlobalRoutingHelper::PopulateRoutingTables ();

  std::cout << "Running the simulation" << std::endl;

  Simulator::Run ();

  std::cout << "Destroying the simulation" << std::endl;

  Simulator::Destroy ();

  std::cout << "Stopping the animation" << std::endl;

  anim.StopAnimation();

  return 0;

}