/* -*- 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
//
// - UDP flows from n0 to n1 and back
// - DropTail queues
// - Tracing of queues and packet receptions to file "udp-echo.tr"
#include <fstream>
#include "ns3/core-module.h"
#include "ns3/simulator-module.h"
#include "ns3/helper-module.h"
using namespace ns3;
NS_LOG_COMPONENT_DEFINE ("RealtimeUdpEchoExample");
int
main (int argc, char *argv[])
{
//
// 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);
//
// But since this is a realtime script, don't allow the user to mess with
// that.
//
GlobalValue::Bind ("SimulatorImplementationType",
StringValue ("ns3::RealtimeSimulatorImpl"));
//
// Explicitly create the nodes required by the topology (shown above).
//
NS_LOG_INFO ("Create nodes.");
NodeContainer n;
n.Create (4);
InternetStackHelper internet;
internet.Install (n);
//
// Explicitly create the channels required by the topology (shown above).
//
NS_LOG_INFO ("Create channels.");
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate(5000000)));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
csma.SetDeviceAttribute ("Mtu", UintegerValue (1400));
NetDeviceContainer d = csma.Install (n);
//
// 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 i = ipv4.Assign (d);
NS_LOG_INFO ("Create Applications.");
//
// Create a UdpEchoServer application on node one.
//
uint16_t port = 9; // well-known echo port number
UdpEchoServerHelper server (port);
ApplicationContainer apps = server.Install (n.Get(1));
apps.Start (Seconds (1.0));
apps.Stop (Seconds (10.0));
//
// Create a UdpEchoClient application to send UDP datagrams from node zero to
// node one.
//
uint32_t packetSize = 1024;
uint32_t maxPacketCount = 500;
Time interPacketInterval = Seconds (0.01);
UdpEchoClientHelper client (i.GetAddress (1), port);
client.SetAttribute ("MaxPackets", UintegerValue (maxPacketCount));
client.SetAttribute ("Interval", TimeValue (interPacketInterval));
client.SetAttribute ("PacketSize", UintegerValue (packetSize));
apps = client.Install (n.Get (0));
apps.Start (Seconds (2.0));
apps.Stop (Seconds (10.0));
std::ofstream ascii;
ascii.open ("realtime-udp-echo.tr");
CsmaHelper::EnablePcapAll ("realtime-udp-echo", false);
CsmaHelper::EnableAsciiAll (ascii);
//
// Now, do the actual simulation.
//
NS_LOG_INFO ("Run Simulation.");
Simulator::Run ();
Simulator::Destroy ();
NS_LOG_INFO ("Done.");
}