--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/realtime/realtime-udp-echo.py Tue Aug 10 12:21:08 2010 +0100
@@ -0,0 +1,111 @@
+#
+# * 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"
+
+import ns3
+
+
+def main(argv):
+ #
+ # Allow the user to override any of the defaults and the above Bind() at
+ # run-time, via command-line arguments
+ #
+ cmd = ns3.CommandLine()
+ cmd.Parse(argv)
+
+ #
+ # But since this is a realtime script, don't allow the user to mess with
+ # that.
+ #
+ ns3.GlobalValue.Bind("SimulatorImplementationType", ns3.StringValue("ns3::RealtimeSimulatorImpl"))
+
+ #
+ # Explicitly create the nodes required by the topology (shown above).
+ #
+ print "Create nodes."
+ n = ns3.NodeContainer()
+ n.Create(4)
+
+ internet = ns3.InternetStackHelper()
+ internet.Install(n)
+
+ #
+ # Explicitly create the channels required by the topology (shown above).
+ #
+ print ("Create channels.")
+ csma = ns3.CsmaHelper()
+ csma.SetChannelAttribute("DataRate", ns3.DataRateValue(ns3.DataRate(5000000)))
+ csma.SetChannelAttribute("Delay", ns3.TimeValue(ns3.MilliSeconds(2)));
+ csma.SetDeviceAttribute("Mtu", ns3.UintegerValue(1400))
+ d = csma.Install(n)
+
+ #
+ # We've got the "hardware" in place. Now we need to add IP addresses.
+ #
+ print ("Assign IP Addresses.")
+ ipv4 = ns3.Ipv4AddressHelper()
+ ipv4.SetBase(ns3.Ipv4Address("10.1.1.0"), ns3.Ipv4Mask("255.255.255.0"))
+ i = ipv4.Assign(d)
+
+ print ("Create Applications.")
+
+ #
+ # Create a UdpEchoServer application on node one.
+ #
+ port = 9 # well-known echo port number
+ server = ns3.UdpEchoServerHelper(port)
+ apps = server.Install(n.Get(1))
+ apps.Start(ns3.Seconds(1.0))
+ apps.Stop(ns3.Seconds(10.0))
+
+ #
+ # Create a UdpEchoClient application to send UDP datagrams from node zero to
+ # node one.
+ #
+ packetSize = 1024
+ maxPacketCount = 500
+ interPacketInterval = ns3.Seconds(0.01)
+ client = ns3.UdpEchoClientHelper(i.GetAddress (1), port)
+ client.SetAttribute("MaxPackets", ns3.UintegerValue(maxPacketCount))
+ client.SetAttribute("Interval", ns3.TimeValue(interPacketInterval))
+ client.SetAttribute("PacketSize", ns3.UintegerValue(packetSize))
+ apps = client.Install(n.Get(0))
+ apps.Start(ns3.Seconds(2.0))
+ apps.Stop(ns3.Seconds(10.0))
+
+ ascii = ns3.AsciiTraceHelper()
+ csma.EnableAsciiAll(ascii.CreateFileStream("realtime-udp-echo.tr"))
+ csma.EnablePcapAll("realtime-udp-echo", False)
+
+ #
+ # Now, do the actual simulation.
+ #
+ print ("Run Simulation.")
+ ns3.Simulator.Run()
+ ns3.Simulator.Destroy()
+ print ("Done.")
+
+if __name__ == '__main__':
+ import sys
+ main(sys.argv)