위 그림에서 가운데에 위치한 노드가 csma switch, 다른 4개가 터미널이다. 소스를 보자면, 처음에는 노드와 연결링크를 설정해 주고, 인터넷과 ip를 설정해 준 후 어플리케이션 onoff를 지정해준다. http://code.nsnam.org/ns-3-dev/file/03b1accee8d1/src/bridge/examples 에서 아래 소스(csma-bridge.cc, csma-bridge.py)를 확인할 수 있다.
실행방법(with visualizer)
./waf --run src/bridge/examples/csma-bridge --vis
./waf --pyrun src/bridge/examples/csma-bridge.py --vis
| |
|
|
import ns.applications
import ns.bridge
import ns.core
import ns.csma
import ns.internet
import ns.network
if __name__ == '__main__':
import sys
main(sys.argv) |
#include <iostream>
#include <fstream>
#include "ns3/core-module.h"
#include "ns3/network-module.h"
#include "ns3/applications-module.h"
#include "ns3/bridge-module.h"
#include "ns3/csma-module.h"
#include "ns3/internet-module.h"
using namespace ns3; |
| |
|
|
def main(argv):
cmd = ns.core.CommandLine()
cmd.Parse(argv)
terminals = ns.network.NodeContainer()
terminals.Create(4)
csmaSwitch = ns.network.NodeContainer()
csmaSwitch.Create(1)
csma = ns.csma.CsmaHelper()
csma.SetChannelAttribute("DataRate", ns.network.DataRateValue(ns.network.DataRate(5000000)))
csma.SetChannelAttribute("Delay", ns.core.TimeValue(ns.core.MilliSeconds(2)))
terminalDevices = ns.network.NetDeviceContainer()
switchDevices = ns.network.NetDeviceContainer()
for i in range(4):
link = csma.Install(ns.network.NodeContainer(ns.network.NodeContainer(terminals.Get(i)), csmaSwitch))
terminalDevices.Add(link.Get(0))
switchDevices.Add(link.Get(1))
switchNode = csmaSwitch.Get(0)
bridgeDevice = ns.bridge.BridgeNetDevice()
switchNode.AddDevice(bridgeDevice)
for portIter in range(switchDevices.GetN()):
bridgeDevice.AddBridgePort(switchDevices.Get(portIter)) |
int main (int argc, char *argv[]) {
CommandLine cmd;
cmd.Parse (argc, argv);
NodeContainer terminals;
terminals.Create (4);
NodeContainer csmaSwitch;
csmaSwitch.Create (1);
CsmaHelper csma;
csma.SetChannelAttribute ("DataRate", DataRateValue (5000000));
csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
NetDeviceContainer terminalDevices;
NetDeviceContainer switchDevices;
for (int i = 0; i < 4; i++) {
NetDeviceContainer link = csma.Install (NodeContainer (terminals.Get (i), csmaSwitch));
terminalDevices.Add (link.Get (0));
switchDevices.Add (link.Get (1));
}
Ptr<Node> switchNode = csmaSwitch.Get (0);
BridgeHelper bridge;
bridge.Install (switchNode, switchDevices); |
| |
|
|
internet = ns.internet.InternetStackHelper()
internet.Install(terminals)
ipv4 = ns.internet.Ipv4AddressHelper()
ipv4.SetBase(ns.network.Ipv4Address("10.1.1.0"), ns.network.Ipv4Mask("255.255.255.0"))
ipv4.Assign(terminalDevices)
port = 9 # Discard port(RFC 863)
onoff = ns.applications.OnOffHelper("ns3::UdpSocketFactory",
ns.network.Address(ns.network.InetSocketAddress(ns.network.Ipv4Address("10.1.1.2"), port)))
onoff.SetAttribute("OnTime", ns.core.StringValue ("ns3::ConstantRandomVariable[Constant=1]"))
onoff.SetAttribute("OffTime", ns.core.StringValue ("ns3::ConstantRandomVariable[Constant=0]")) |
InternetStackHelper internet;
internet.Install (terminals);
Ipv4AddressHelper ipv4;
ipv4.SetBase ("10.1.1.0", "255.255.255.0");
ipv4.Assign (terminalDevices);
uint16_t port = 9; // Discard port (RFC 863)
OnOffHelper onoff ("ns3::UdpSocketFactory",
Address (InetSocketAddress (Ipv4Address ("10.1.1.2"), port)));
onoff.SetAttribute ("OnTime", RandomVariableValue (ConstantVariable (1)));
onoff.SetAttribute ("OffTime", RandomVariableValue (ConstantVariable (0)));
|
| |
|
app = onoff.Install(ns.network.NodeContainer(terminals.Get(0)))
app.Start(ns.core.Seconds(1.0))
app.Stop(ns.core.Seconds(10.0))
sink = ns.applications.PacketSinkHelper("ns3::UdpSocketFactory",
ns.network.Address(ns.network.InetSocketAddress(ns.network.Ipv4Address.GetAny(), port)))
app = sink.Install(ns.network.NodeContainer(terminals.Get(1)))
app.Start(ns.core.Seconds(0.0))
onoff.SetAttribute("Remote",
ns.network.AddressValue(ns.network.InetSocketAddress(ns.network.Ipv4Address("10.1.1.1"), port)))
app = onoff.Install(ns.network.NodeContainer(terminals.Get(3)))
app.Start(ns.core.Seconds(1.1))
app.Stop(ns.core.Seconds(10.0))
app = sink.Install(ns.network.NodeContainer(terminals.Get(0)))
app.Start(ns.core.Seconds(0.0))
#ascii = ns.network.AsciiTraceHelper();
#csma.EnableAsciiAll(ascii.CreateFileStream ("csma-bridge.tr"));
csma.EnablePcapAll("csma-bridge", False)
ns.core.Simulator.Run()
ns.core.Simulator.Destroy()
|
ApplicationContainer app = onoff.Install (terminals.Get (0));
app.Start (Seconds (1.0));
app.Stop (Seconds (10.0));
PacketSinkHelper sink ("ns3::UdpSocketFactory",
Address (InetSocketAddress (Ipv4Address::GetAny (), port)));
app = sink.Install (terminals.Get (1));
app.Start (Seconds (0.0));
onoff.SetAttribute ("Remote",
AddressValue (InetSocketAddress (Ipv4Address ("10.1.1.1"), port)));
app = onoff.Install (terminals.Get (3));
app.Start (Seconds (1.1));
app.Stop (Seconds (10.0));
app = sink.Install (terminals.Get (0));
app.Start (Seconds (0.0));
AsciiTraceHelper ascii;
csma.EnableAsciiAll (ascii.CreateFileStream ("csma-bridge.tr"));
csma.EnablePcapAll ("csma-bridge", false);
Simulator::Run ();
Simulator::Destroy ();
}
|
댓글