/* -*- 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

 */

//

// Example of the sending of a datagram to a broadcast address

//

// Network topology

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

//       |          |

//       n0    n1   n2   

//       |     |       

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

//

//   n0 originates UDP broadcast to 255.255.255.255/discard port, which 

//   is replicated and received on both n1 and n2

#include <iostream>

#include <fstream>

#include <string>

#include <cassert>

#include "ns3/core-module.h"

#include "ns3/helper-module.h"

#include "ns3/internet-node-module.h"

#include "ns3/simulator-module.h"

using namespace ns3;

NS_LOG_COMPONENT_DEFINE ("CsmaBroadcastExample");

int 

main (int argc, char *argv[])

{

  // Users may find it convenient to turn on explicit debugging

  // for selected modules; the below lines suggest how to do this

#if 0

  LogComponentEnable ("CsmaBroadcastExample", LOG_LEVEL_INFO);

  LogComponentEnable("Object", LOG_LEVEL_ALL);

  LogComponentEnable("Queue", LOG_LEVEL_ALL);

  LogComponentEnable("DropTailQueue", LOG_LEVEL_ALL);

  LogComponentEnable("Channel", LOG_LEVEL_ALL);

  LogComponentEnable("CsmaChannel", LOG_LEVEL_ALL);

  LogComponentEnable("NetDevice", LOG_LEVEL_ALL);

  LogComponentEnable("CsmaNetDevice", LOG_LEVEL_ALL);

  LogComponentEnable("Ipv4L3Protocol", LOG_LEVEL_ALL);

  LogComponentEnable("PacketSocket", LOG_LEVEL_ALL);

  LogComponentEnable("Socket", LOG_LEVEL_ALL);

  LogComponentEnable("UdpSocket", LOG_LEVEL_ALL);

  LogComponentEnable("UdpL4Protocol", LOG_LEVEL_ALL);

  LogComponentEnable("Ipv4L3Protocol", LOG_LEVEL_ALL);

  LogComponentEnable("Ipv4StaticRouting", LOG_LEVEL_ALL);

  LogComponentEnable("Ipv4Interface", LOG_LEVEL_ALL);

  LogComponentEnable("ArpIpv4Interface", LOG_LEVEL_ALL);

  LogComponentEnable("Ipv4LoopbackInterface", LOG_LEVEL_ALL);

  LogComponentEnable("OnOffApplication", LOG_LEVEL_ALL);

  // Enable the below logging command to see the packets being received

  LogComponentEnable("PacketSinkApplication", LOG_LEVEL_ALL);

#endif

  // Set up some default values for the simulation.  Use the Bind()

  // 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.");

  NS_LOG_INFO ("Build Topology.");

  CsmaHelper csma;

  csma.SetChannelParameter ("BitRate", DataRate(5000000));

  csma.SetChannelParameter ("Delay", MilliSeconds(2));

  NetDeviceContainer n0 = csma.Build (c0);

  NetDeviceContainer n1 = csma.Build (c1);

  InternetStackHelper internet;

  internet.Build (c0);

  internet.Build (c1);

  NS_LOG_INFO ("Assign IP Addresses.");

  Ipv4AddressHelper ipv4;

  ipv4.SetBase ("10.1.0.0", "255.255.255.0");

  ipv4.Allocate (n0);

  ipv4.SetBase ("192.168.1.0", "255.255.255.0");

  ipv4.Allocate (n1);

  // RFC 863 discard port ("9") indicates packet should be thrown away

  // by the system.  We allow this silent discard to be overridden

  // by the PacketSink application.

  uint16_t port = 9;

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

  // 512 bytes (default) at a rate of 500 Kb/s (default) from n0

  NS_LOG_INFO ("Create Applications.");

  OnOffHelper onoff;

  onoff.SetUdpRemote (Ipv4Address ("255.255.255.255"), port);

  onoff.SetAppAttribute ("OnTime", ConstantVariable (1));

  onoff.SetAppAttribute ("OffTime", ConstantVariable (0));

  ApplicationContainer app = onoff.Build (c0.Get (0));

  // Start the application

  app.Start (Seconds (1.0));

  app.Stop (Seconds (10.0));

  // Create an optional packet sink to receive these packets

  PacketSinkHelper sink;

  sink.SetupUdp (Ipv4Address::GetAny (), port);

  sink.Build (c0.Get (1));

  sink.Build (c1.Get (1));

  NS_LOG_INFO ("Run Simulation.");

  Simulator::Run ();    

  Simulator::Destroy ();

  NS_LOG_INFO ("Done.");

}