151 lines
5.4 KiB
C++
151 lines
5.4 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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*/
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//
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// Network topology
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//
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// 10Mb/s, 10ms 10Mb/s, 10ms
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// n0-----------------n1-----------------n2
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//
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//
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// - CBR traffic for 1000 seconds
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// - Tracing of queues and packet receptions to file
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// "tcp-large-transfer.tr"
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// - pcap traces also generated in the following files
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// "tcp-large-transfer-$n-$i.pcap" where n and i represent node and interface
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// numbers respectively
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// Usage (e.g.): ./waf --run tcp-large-transfer
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#include <ctype.h>
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#include <iostream>
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#include <fstream>
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#include <string>
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#include <cassert>
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#include "ns3/core-module.h"
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#include "ns3/common-module.h"
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#include "ns3/helper-module.h"
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#include "ns3/node-module.h"
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#include "ns3/global-route-manager.h"
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#include "ns3/simulator-module.h"
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE ("TcpErrors");
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int main (int argc, char *argv[])
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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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// LogComponentEnable("TcpL4Protocol", LOG_LEVEL_ALL);
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// LogComponentEnable("TcpSocketImpl", LOG_LEVEL_ALL);
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// LogComponentEnable("PacketSink", LOG_LEVEL_ALL);
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// LogComponentEnable("TcpErrors", LOG_LEVEL_ALL);
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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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// Allow the user to override any of the defaults and the above
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// Bind()s at run-time, via command-line arguments
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CommandLine cmd;
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cmd.Parse (argc, argv);
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// Here, we will explicitly create three nodes. The first container contains
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// nodes 0 and 1 from the diagram above, and the second one contains nodes
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// 1 and 2. This reflects the channel connectivity, and will be used to
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// install the network interfaces and connect them with a channel.
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NodeContainer n0n1;
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n0n1.Create (2);
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NodeContainer n1n2;
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n1n2.Add (n0n1.Get (1));
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n1n2.Create (1);
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// We create the channels first without any IP addressing information
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// First make and configure the helper, so that it will put the appropriate
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// parameters on the network interfaces and channels we are about to install.
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PointToPointHelper p2p;
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p2p.SetDeviceAttribute ("DataRate", DataRateValue (DataRate(10000000)));
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p2p.SetChannelAttribute ("Delay", TimeValue (MilliSeconds(10)));
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// And then install devices and channels connecting our topology.
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NetDeviceContainer d0d1 = p2p.Install (n0n1);
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NetDeviceContainer d1d2 = p2p.Install (n1n2);
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// Now add ip/tcp stack to all nodes.
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NodeContainer allNodes = NodeContainer (n0n1, n1n2.Get (1));
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InternetStackHelper internet;
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internet.Install (allNodes);
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// Later, we add IP addresses.
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Ipv4AddressHelper ipv4;
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ipv4.SetBase ("10.1.3.0", "255.255.255.0");
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Ipv4InterfaceContainer i0i1 = ipv4.Assign (d0d1);
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ipv4.SetBase ("10.1.2.0", "255.255.255.0");
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Ipv4InterfaceContainer i1i2 = ipv4.Assign (d1d2);
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// and setup ip routing tables to get total ip-level connectivity.
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GlobalRouteManager::PopulateRoutingTables ();
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// Set up the sending CBR application
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uint16_t servPort = 50000;
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Address remoteAddress(InetSocketAddress(i1i2.GetAddress (1), servPort));
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OnOffHelper clientHelper ("ns3::TcpSocketFactory", remoteAddress);
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clientHelper.SetAttribute
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("OnTime", RandomVariableValue (ConstantVariable (1)));
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clientHelper.SetAttribute
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("OffTime", RandomVariableValue (ConstantVariable (0)));
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ApplicationContainer clientApp = clientHelper.Install(n0n1.Get(0));
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clientApp.Start (Seconds (1.0));
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clientApp.Stop (Seconds (10.0));
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// Create a packet sink to receive at n2
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PacketSinkHelper sinkHelper ("ns3::TcpSocketFactory",
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InetSocketAddress (Ipv4Address::GetAny (), servPort));
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ApplicationContainer sinkApp = sinkHelper.Install (n1n2.Get(1));
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sinkApp.Start (Seconds (1.0));
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sinkApp.Stop (Seconds (10.0));
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// We're going to model a lossy channel
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RandomVariableValue u01(UniformVariable (0.0, 1.0));
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DoubleValue rate(0.001);
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Ptr<RateErrorModel> em1 =
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CreateObject<RateErrorModel> ("RanVar", u01, "ErrorRate", rate);
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Ptr<RateErrorModel> em2 =
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CreateObject<RateErrorModel> ("RanVar", u01, "ErrorRate", rate);
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//put error models on both netdevices of the router nodes so that there is
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//loss of both data and acks
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d0d1.Get(1)->SetAttribute("ReceiveErrorModel", PointerValue (em1));
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d1d2.Get(0)->SetAttribute("ReceiveErrorModel", PointerValue (em2));
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//Ask for ASCII and pcap traces of network traffic
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std::ofstream ascii;
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ascii.open ("tcp-errors.tr");
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PointToPointHelper::EnableAsciiAll (ascii);
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PointToPointHelper::EnablePcapAll ("tcp-errors");
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// Finally, set up the simulator to run for 1000 seconds.
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Simulator::Stop (Seconds(1000));
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Simulator::Run ();
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Simulator::Destroy ();
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}
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