148 lines
4.6 KiB
C++
148 lines
4.6 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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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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// - CBR/UDP flows from n0 to n1 and from n3 to n0
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// - DropTail queues
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// - Tracing of queues and packet receptions to file "csma-one-subnet.tr"
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#include <iostream>
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#include <fstream>
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#include "ns3/simulator-module.h"
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#include "ns3/node-module.h"
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#include "ns3/core-module.h"
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#include "ns3/helper-module.h"
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE ("CsmaOneSubnetExample");
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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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// Users may find it convenient to turn on explicit debugging
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// for selected modules; the below lines suggest how to do this
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//
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#if 0
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LogComponentEnable ("CsmaOneSubnetExample", LOG_LEVEL_INFO);
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#endif
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//
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// Make the random number generators generate reproducible results.
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//
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RandomVariable::UseGlobalSeed (1, 1, 2, 3, 5, 8);
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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;
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cmd.Parse (argc, argv);
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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 c;
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c.Create (4);
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NS_LOG_INFO ("Build Topology");
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CsmaHelper csma;
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csma.SetChannelParameter ("BitRate", DataRateValue (5000000));
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csma.SetChannelParameter ("Delay", TimeValue (MilliSeconds (2)));
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//
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// Now fill out the topology by creating the net devices required to connect
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// the nodes to the channels and hooking them up. AddIpv4CsmaNetDevice will
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// create a net device, add a MAC address (in memory of the pink flamingo) and
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// connect the net device to a nodes and also to a channel. the
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// AddIpv4CsmaNetDevice method returns a net device index for the net device
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// created on the node. Interpret nd0 as the net device we created for node
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// zero.
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//
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NetDeviceContainer nd0 = csma.Install (c);
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InternetStackHelper internet;
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internet.Install (c);
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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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ipv4.Assign (nd0);
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//
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// Create an OnOff application to send UDP datagrams from node zero to node 1.
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//
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NS_LOG_INFO ("Create Applications.");
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uint16_t port = 9; // Discard port (RFC 863)
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OnOffHelper onoff ("ns3::Udp",
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Address (InetSocketAddress (Ipv4Address ("10.1.1.2"), port)));
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onoff.SetAttribute ("OnTime", RandomVariableValue (ConstantVariable (1)));
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onoff.SetAttribute ("OffTime", RandomVariableValue (ConstantVariable (0)));
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ApplicationContainer app = onoff.Install (c.Get (0));
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// Start the application
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app.Start (Seconds (1.0));
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app.Stop (Seconds (10.0));
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// Create an optional packet sink to receive these packets
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PacketSinkHelper sink ("ns3::Udp",
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Address (InetSocketAddress (Ipv4Address::GetAny (), port)));
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sink.Install (c.Get (1));
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//
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// Create a similar flow from n3 to n0, starting at time 1.1 seconds
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//
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onoff.SetAttribute ("Remote",
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AddressValue (InetSocketAddress (Ipv4Address ("10.1.1.1"), port)));
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ApplicationContainer app2 = onoff.Install (c.Get (3));
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sink.Install (c.Get (0));
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app2.Start(Seconds (1.1));
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app2.Stop (Seconds (10.0));
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//
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// Configure tracing of all enqueue, dequeue, and NetDevice receive events.
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// Trace output will be sent to the file "csma-one-subnet.tr"
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//
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NS_LOG_INFO ("Configure Tracing.");
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std::ofstream ascii;
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ascii.open ("csma-one-subnet.tr");
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CsmaHelper::EnableAscii (ascii);
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//
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// Also configure some tcpdump traces; each interface will be traced.
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// The output files will be named:
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// csma-one-subnet.pcap-<nodeId>-<interfaceId>
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// and can be read by the "tcpdump -r" command (use "-tt" option to
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// display timestamps correctly)
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//
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CsmaHelper::EnablePcap ("csma-one-subnet");
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//
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// Now, do the actual simulation.
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//
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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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}
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