/* -*- 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
*/
// Network topology
//
// n0 n1 n2 n3
// | | | |
// =================
// LAN
//
// - CBR/UDP flows from n0 to n1 and from n3 to n0
// - DropTail queues
// - Tracing of queues and packet receptions to file "csma-one-subnet.tr"
#include <iostream>
#include <fstream>
#include "ns3/simulator-module.h"
#include "ns3/node-module.h"
#include "ns3/core-module.h"
#include "ns3/helper-module.h"
using namespace ns3;
NS_LOG_COMPONENT_DEFINE ("CsmaOneSubnetExample");
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 ("CsmaOneSubnetExample", LOG_LEVEL_INFO);
#endif
//
// Allow the user to override any of the defaults and the above Bind() at
// run-time, via command-line arguments
//
CommandLine cmd;
cmd.Parse (argc, argv);
//
// Explicitly create the nodes required by the topology (shown above).
//
NS_LOG_INFO ("Create nodes.");
NodeContainer nodes;
nodes.Create (4);
NS_LOG_INFO ("Build Topology");
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (5000000));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
//
// Now fill out the topology by creating the net devices required to connect
// the nodes to the channels and hooking them up.
//
NetDeviceContainer devices = csma.Install (nodes);
InternetStackHelper internet;
internet.Install (nodes);
// We've got the "hardware" in place. Now we need to add IP addresses.
//
NS_LOG_INFO ("Assign IP Addresses.");
Ipv4AddressHelper ipv4;
ipv4.SetBase ("10.1.1.0", "255.255.255.0");
Ipv4InterfaceContainer interfaces = ipv4.Assign (devices);
//
// Create an OnOff application to send UDP datagrams from node zero to node 1.
//
NS_LOG_INFO ("Create Applications.");
uint16_t port = 9; // Discard port (RFC 863)
OnOffHelper onoff ("ns3::UdpSocketFactory",
Address (InetSocketAddress (interfaces.GetAddress (1), port)));
onoff.SetAttribute ("OnTime", RandomVariableValue (ConstantVariable (1)));
onoff.SetAttribute ("OffTime", RandomVariableValue (ConstantVariable (0)));
ApplicationContainer app = onoff.Install (nodes.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 ("ns3::UdpSocketFactory",
Address (InetSocketAddress (Ipv4Address::GetAny (), port)));
app = sink.Install (nodes.Get (1));
app.Start (Seconds (0.0));
//
// Create a similar flow from n3 to n0, starting at time 1.1 seconds
//
onoff.SetAttribute ("Remote",
AddressValue (InetSocketAddress (interfaces.GetAddress (0), port)));
app = onoff.Install (nodes.Get (3));
app.Start(Seconds (1.1));
app.Stop (Seconds (10.0));
app = sink.Install (nodes.Get (0));
app.Start (Seconds (0.0));
//
// Configure tracing of all enqueue, dequeue, and NetDevice receive events.
// Trace output will be sent to the file "csma-one-subnet.tr"
//
NS_LOG_INFO ("Configure Tracing.");
std::ofstream ascii;
ascii.open ("csma-one-subnet.tr");
CsmaHelper::EnableAsciiAll (ascii);
//
// Also configure some tcpdump traces; each interface will be traced.
// The output files will be named:
// csma-one-subnet-<nodeId>-<interfaceId>.pcap
// and can be read by the "tcpdump -r" command (use "-tt" option to
// display timestamps correctly)
//
CsmaHelper::EnablePcapAll ("csma-one-subnet", false);
//
// Now, do the actual simulation.
//
NS_LOG_INFO ("Run Simulation.");
Simulator::Run ();
Simulator::Destroy ();
NS_LOG_INFO ("Done.");
}