173 lines
6.1 KiB
C++
173 lines
6.1 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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// Network topology
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//
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// n0
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// \ 5 Mb/s, 2ms
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// \ 1.5Mb/s, 10ms
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// n2 -------------------------n3
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// /
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// / 5 Mb/s, 2ms
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// n1
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//
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// - all links are point-to-point links with indicated one-way BW/delay
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// - CBR/UDP flows from n0 to n3, and from n3 to n1
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// - FTP/TCP flow from n0 to n3, starting at time 1.2 to time 1.35 sec.
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// - UDP packet size of 210 bytes, with per-packet interval 0.00375 sec.
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// (i.e., DataRate of 448,000 bps)
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// - DropTail queues
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// - Tracing of queues and packet receptions to file
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// "simple-error-model.tr"
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#include <fstream>
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#include "ns3/core-module.h"
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#include "ns3/network-module.h"
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#include "ns3/internet-module.h"
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#include "ns3/point-to-point-module.h"
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#include "ns3/applications-module.h"
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#include "ns3/ipv4-global-routing-helper.h"
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE ("SimpleErrorModelExample");
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int
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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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#if 0
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LogComponentEnable ("SimplePointToPointExample", LOG_LEVEL_INFO);
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#endif
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// Set a few attributes
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Config::SetDefault ("ns3::RateErrorModel::ErrorRate", DoubleValue (0.01));
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Config::SetDefault ("ns3::RateErrorModel::ErrorUnit", StringValue ("ERROR_UNIT_PACKET"));
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Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (210));
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Config::SetDefault ("ns3::OnOffApplication::DataRate", DataRateValue (DataRate ("448kb/s")));
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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 four nodes. In more sophisticated
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// topologies, we could configure a node factory.
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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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NodeContainer n0n2 = NodeContainer (c.Get (0), c.Get (2));
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NodeContainer n1n2 = NodeContainer (c.Get (1), c.Get (2));
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NodeContainer n3n2 = NodeContainer (c.Get (3), c.Get (2));
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InternetStackHelper internet;
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internet.Install (c);
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// We create the channels first without any IP addressing information
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NS_LOG_INFO ("Create channels.");
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PointToPointHelper p2p;
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p2p.SetDeviceAttribute ("DataRate", DataRateValue (DataRate (5000000)));
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p2p.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
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NetDeviceContainer d0d2 = p2p.Install (n0n2);
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NetDeviceContainer d1d2 = p2p.Install (n1n2);
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p2p.SetDeviceAttribute ("DataRate", DataRateValue (DataRate (1500000)));
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p2p.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (10)));
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NetDeviceContainer d3d2 = p2p.Install (n3n2);
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// Later, we add IP addresses.
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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 (d0d2);
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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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ipv4.SetBase ("10.1.3.0", "255.255.255.0");
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Ipv4InterfaceContainer i3i2 = ipv4.Assign (d3d2);
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NS_LOG_INFO ("Use global routing.");
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Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
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// Create the OnOff application to send UDP datagrams of size
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// 210 bytes at a rate of 448 Kb/s
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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::UdpSocketFactory",
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Address (InetSocketAddress (i3i2.GetAddress (1), port)));
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onoff.SetConstantRate (DataRate ("448kb/s"));
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ApplicationContainer apps = onoff.Install (c.Get (0));
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apps.Start (Seconds (1.0));
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apps.Stop (Seconds (10.0));
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// Create an optional packet sink to receive these packets
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PacketSinkHelper sink ("ns3::UdpSocketFactory",
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Address (InetSocketAddress (Ipv4Address::GetAny (), port)));
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apps = sink.Install (c.Get (2));
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apps.Start (Seconds (1.0));
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apps.Stop (Seconds (10.0));
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// Create a similar flow from n3 to n1, starting at time 1.1 seconds
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onoff.SetAttribute ("Remote",
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AddressValue (InetSocketAddress (i1i2.GetAddress (0), port)));
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apps = onoff.Install (c.Get (3));
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apps.Start (Seconds (1.1));
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apps.Stop (Seconds (10.0));
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// Create a packet sink to receive these packets
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sink.SetAttribute ("Local",
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AddressValue (InetSocketAddress (Ipv4Address::GetAny (), port)));
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apps = sink.Install (c.Get (1));
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apps.Start (Seconds (1.1));
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apps.Stop (Seconds (10.0));
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//
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// Error model
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//
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// Create an ErrorModel based on the implementation (constructor)
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// specified by the default classId
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Ptr<RateErrorModel> em = CreateObject<RateErrorModel> ();
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em->SetAttribute ("ErrorRate", DoubleValue (0.001));
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d3d2.Get (0)->SetAttribute ("ReceiveErrorModel", PointerValue (em));
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// Now, let's use the ListErrorModel and explicitly force a loss
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// of the packets with pkt-uids = 11 and 17 on node 2, device 0
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std::list<uint32_t> sampleList;
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sampleList.push_back (11);
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sampleList.push_back (17);
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// This time, we'll explicitly create the error model we want
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Ptr<ListErrorModel> pem = CreateObject<ListErrorModel> ();
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pem->SetList (sampleList);
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d0d2.Get (1)->SetAttribute ("ReceiveErrorModel", PointerValue (pem));
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AsciiTraceHelper ascii;
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p2p.EnableAsciiAll (ascii.CreateFileStream ("simple-error-model.tr"));
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p2p.EnablePcapAll ("simple-error-model");
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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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