121 lines
3.9 KiB
C++
121 lines
3.9 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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*/
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#include "ns3/applications-module.h"
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#include "ns3/core-module.h"
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#include "ns3/internet-module.h"
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#include "ns3/netanim-module.h"
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#include "ns3/network-module.h"
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#include "ns3/point-to-point-layout-module.h"
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#include "ns3/point-to-point-module.h"
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// Network topology (default)
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//
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// n2 n3 n4 .
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// \ | / .
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// \|/ .
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// n1--- n0---n5 .
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// /|\ .
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// / | \ .
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// n8 n7 n6 .
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//
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE("Star");
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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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// Set up some default values for the simulation.
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//
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Config::SetDefault("ns3::OnOffApplication::PacketSize", UintegerValue(137));
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// ??? try and stick 15kb/s into the data rate
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Config::SetDefault("ns3::OnOffApplication::DataRate", StringValue("14kb/s"));
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//
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// Default number of nodes in the star. Overridable by command line argument.
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//
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uint32_t nSpokes = 8;
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CommandLine cmd(__FILE__);
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cmd.AddValue("nSpokes", "Number of nodes to place in the star", nSpokes);
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cmd.Parse(argc, argv);
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NS_LOG_INFO("Build star topology.");
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PointToPointHelper pointToPoint;
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pointToPoint.SetDeviceAttribute("DataRate", StringValue("5Mbps"));
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pointToPoint.SetChannelAttribute("Delay", StringValue("2ms"));
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PointToPointStarHelper star(nSpokes, pointToPoint);
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NS_LOG_INFO("Install internet stack on all nodes.");
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InternetStackHelper internet;
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star.InstallStack(internet);
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NS_LOG_INFO("Assign IP Addresses.");
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star.AssignIpv4Addresses(Ipv4AddressHelper("10.1.1.0", "255.255.255.0"));
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NS_LOG_INFO("Create applications.");
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//
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// Create a packet sink on the star "hub" to receive packets.
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//
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uint16_t port = 50000;
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Address hubLocalAddress(InetSocketAddress(Ipv4Address::GetAny(), port));
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PacketSinkHelper packetSinkHelper("ns3::TcpSocketFactory", hubLocalAddress);
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ApplicationContainer hubApp = packetSinkHelper.Install(star.GetHub());
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hubApp.Start(Seconds(1.0));
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hubApp.Stop(Seconds(10.0));
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//
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// Create OnOff applications to send TCP to the hub, one on each spoke node.
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//
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OnOffHelper onOffHelper("ns3::TcpSocketFactory", Address());
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onOffHelper.SetAttribute("OnTime", StringValue("ns3::ConstantRandomVariable[Constant=1]"));
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onOffHelper.SetAttribute("OffTime", StringValue("ns3::ConstantRandomVariable[Constant=0]"));
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ApplicationContainer spokeApps;
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for (uint32_t i = 0; i < star.SpokeCount(); ++i)
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{
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AddressValue remoteAddress(InetSocketAddress(star.GetHubIpv4Address(i), port));
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onOffHelper.SetAttribute("Remote", remoteAddress);
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spokeApps.Add(onOffHelper.Install(star.GetSpokeNode(i)));
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}
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spokeApps.Start(Seconds(1.0));
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spokeApps.Stop(Seconds(10.0));
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NS_LOG_INFO("Enable static global routing.");
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//
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// Turn on global static routing so we can actually be routed across the star.
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//
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Ipv4GlobalRoutingHelper::PopulateRoutingTables();
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NS_LOG_INFO("Enable pcap tracing.");
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//
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// Do pcap tracing on all point-to-point devices on all nodes.
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//
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pointToPoint.EnablePcapAll("star");
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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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