123 lines
3.6 KiB
C++
123 lines
3.6 KiB
C++
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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// Network topology
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//
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// n0 n1 n2 n3
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// | | | |
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// =================
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// LAN
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//
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// - UDP flows from n0 to n1 and back
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// - DropTail queues
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// - Tracing of queues and packet receptions to file "udp-echo.tr"
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#include "ns3/applications-module.h"
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#include "ns3/core-module.h"
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#include "ns3/csma-module.h"
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#include "ns3/internet-module.h"
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#include <fstream>
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE("RealtimeUdpEchoExample");
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int
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main(int argc, char* argv[])
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{
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//
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// Allow the user to override any of the defaults and the above Bind() at
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// run-time, via command-line arguments
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//
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CommandLine cmd(__FILE__);
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cmd.Parse(argc, argv);
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//
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// But since this is a realtime script, don't allow the user to mess with
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// that.
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//
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GlobalValue::Bind("SimulatorImplementationType", StringValue("ns3::RealtimeSimulatorImpl"));
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//
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// Explicitly create the nodes required by the topology (shown above).
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//
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NS_LOG_INFO("Create nodes.");
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NodeContainer n;
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n.Create(4);
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InternetStackHelper internet;
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internet.Install(n);
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//
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// Explicitly create the channels required by the topology (shown above).
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//
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NS_LOG_INFO("Create channels.");
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CsmaHelper csma;
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csma.SetChannelAttribute("DataRate", DataRateValue(DataRate(5000000)));
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csma.SetChannelAttribute("Delay", TimeValue(MilliSeconds(2)));
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csma.SetDeviceAttribute("Mtu", UintegerValue(1400));
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NetDeviceContainer d = csma.Install(n);
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//
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// We've got the "hardware" in place. Now we need to add IP addresses.
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//
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NS_LOG_INFO("Assign IP Addresses.");
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Ipv4AddressHelper ipv4;
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ipv4.SetBase("10.1.1.0", "255.255.255.0");
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Ipv4InterfaceContainer i = ipv4.Assign(d);
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NS_LOG_INFO("Create Applications.");
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//
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// Create a UdpEchoServer application on node one.
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//
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uint16_t port = 9; // well-known echo port number
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UdpEchoServerHelper server(port);
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ApplicationContainer apps = server.Install(n.Get(1));
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apps.Start(Seconds(1.0));
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apps.Stop(Seconds(10.0));
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//
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// Create a UdpEchoClient application to send UDP datagrams from node zero to
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// node one.
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//
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uint32_t packetSize = 1024;
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uint32_t maxPacketCount = 500;
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Time interPacketInterval = Seconds(0.01);
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UdpEchoClientHelper client(i.GetAddress(1), port);
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client.SetAttribute("MaxPackets", UintegerValue(maxPacketCount));
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client.SetAttribute("Interval", TimeValue(interPacketInterval));
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client.SetAttribute("PacketSize", UintegerValue(packetSize));
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apps = client.Install(n.Get(0));
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apps.Start(Seconds(2.0));
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apps.Stop(Seconds(10.0));
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AsciiTraceHelper ascii;
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csma.EnableAsciiAll(ascii.CreateFileStream("realtime-udp-echo.tr"));
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csma.EnablePcapAll("realtime-udp-echo", false);
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//
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// Now, do the actual simulation.
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//
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Simulator::Stop(Seconds(11.0));
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NS_LOG_INFO("Run Simulation.");
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Simulator::Run();
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Simulator::Destroy();
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NS_LOG_INFO("Done.");
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return 0;
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}
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