example code.
/* -*- 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
*/
// Port of ns-2/tcl/ex/simple.tcl to ns-3
//
// Network topology
//
// n0 n1 n2 n3
// | | | |
// =====================
//
// - CBR/UDP flows from n0 to n1, and from n3 to n0
// - 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 "csma-cd-one-subnet.tr"
#include <iostream>
#include <fstream>
#include <string>
#include <cassert>
#include "ns3/command-line.h"
#include "ns3/default-value.h"
#include "ns3/ptr.h"
#include "ns3/random-variable.h"
#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/csma-cd-channel.h"
#include "ns3/csma-cd-net-device.h"
#include "ns3/eui48-address.h"
#include "ns3/packet-socket-address.h"
#include "ns3/socket.h"
#include "ns3/onoff-application.h"
#include "ns3/queue.h"
using namespace ns3;
static Ptr<CsmaCdNetDevice>
CreateCsmaCdDevice (Ptr<Node> node, Ptr<CsmaCdChannel> channel)
{
Ptr<CsmaCdNetDevice> device = Create<CsmaCdNetDevice> (node);
device->Attach (channel);
Ptr<Queue> queue = Queue::CreateDefault ();
device->AddQueue (queue);
return device;
}
int main (int argc, char *argv[])
{
CommandLine::Parse (argc, argv);
// Here, we will explicitly create four nodes. In more sophisticated
// topologies, we could configure a node factory.
Ptr<Node> n0 = Create<Node> ();
Ptr<Node> n1 = Create<Node> ();
Ptr<Node> n2 = Create<Node> ();
Ptr<Node> n3 = Create<Node> ();
// create the shared medium used by all csma/cd devices.
Ptr<CsmaCdChannel> channel = Create<CsmaCdChannel> (DataRate(5000000), MilliSeconds(2));
// use a helper function to connect our nodes to the shared channel.
Ptr<NetDevice> n0If = CreateCsmaCdDevice (n0, channel);
Ptr<NetDevice> n1If = CreateCsmaCdDevice (n1, channel);
Ptr<NetDevice> n2If = CreateCsmaCdDevice (n2, channel);
Ptr<NetDevice> n3If = CreateCsmaCdDevice (n3, channel);
// create the address which identifies n1 from n0
PacketSocketAddress n0ToN1;
n0ToN1.SetDevice (n0If->GetIfIndex ()); // set outgoing interface for outgoing packets
n0ToN1.SetPhysicalAddress (n1If->GetAddress ()); // set destination address for outgoing packets
n0ToN1.SetProtocol (2); // set arbitrary protocol for outgoing packets
// create the address which identifies n0 from n3
PacketSocketAddress n3ToN0;
n3ToN0.SetDevice (n3If->GetIfIndex ());
n3ToN0.SetPhysicalAddress (n0If->GetAddress ());
n3ToN0.SetProtocol (3);
// Create the OnOff application to send raw datagrams of size
// 210 bytes at a rate of 448 Kb/s
// from n0 to n1
Ptr<OnOffApplication> ooff = Create<OnOffApplication> (
n0,
n0ToN1.ConvertTo (),
"Packet",
ConstantVariable(1),
ConstantVariable(0));
// Start the application
ooff->Start(Seconds(1.0));
ooff->Stop (Seconds(10.0));
// Create a similar flow from n3 to n0, starting at time 1.1 seconds
ooff = Create<OnOffApplication> (
n3,
n3ToN0.ConvertTo (),
"Packet",
ConstantVariable(1),
ConstantVariable(0));
// Start the application
ooff->Start(Seconds(1.1));
ooff->Stop (Seconds(10.0));
// Configure tracing of all enqueue, dequeue, and NetDevice receive events
// Trace output will be sent to the csma-cd-packet-socket.tr file
AsciiTrace asciitrace ("csma-cd-packet-socket.tr");
asciitrace.TraceAllNetDeviceRx ();
asciitrace.TraceAllQueues ();
Simulator::Run ();
Simulator::Destroy ();
}