225 lines
7.9 KiB
C++
225 lines
7.9 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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// 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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// 1.5 Mb/s, 100ms
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//
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// this is a modification of simple-global-routing to allow for
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// a single hop but higher-cost path between n1 and n3
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//
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// - Tracing of queues and packet receptions to file "simple-rerouting.tr"
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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/log.h"
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#include "ns3/command-line.h"
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#include "ns3/default-value.h"
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#include "ns3/ptr.h"
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#include "ns3/random-variable.h"
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#include "ns3/simulator.h"
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#include "ns3/nstime.h"
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#include "ns3/data-rate.h"
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#include "ns3/ascii-trace.h"
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#include "ns3/pcap-trace.h"
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#include "ns3/internet-node.h"
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#include "ns3/point-to-point-channel.h"
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#include "ns3/point-to-point-net-device.h"
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#include "ns3/ipv4-address.h"
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#include "ns3/ipv4.h"
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#include "ns3/socket.h"
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#include "ns3/inet-socket-address.h"
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#include "ns3/ipv4-route.h"
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#include "ns3/point-to-point-topology.h"
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#include "ns3/onoff-application.h"
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#include "ns3/packet-sink.h"
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#include "ns3/global-route-manager.h"
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using namespace ns3;
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NS_LOG_COMPONENT_DEFINE ("SimpleAlternateRoutingExample");
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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("GlobalRouteManager", LOG_LOGIC);
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LogComponentEnable("GlobalRouter", LOG_LOGIC);
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LogComponentEnable("Object", LOG_LEVEL_ALL);
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LogComponentEnable("Queue", LOG_LEVEL_ALL);
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LogComponentEnable("DropTailQueue", LOG_LEVEL_ALL);
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LogComponentEnable("Channel", LOG_LEVEL_ALL);
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LogComponentEnable("CsmaChannel", LOG_LEVEL_ALL);
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LogComponentEnable("NetDevice", LOG_LEVEL_ALL);
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LogComponentEnable("CsmaNetDevice", LOG_LEVEL_ALL);
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LogComponentEnable("Ipv4L3Protocol", LOG_LEVEL_ALL);
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LogComponentEnable("PacketSocket", LOG_LEVEL_ALL);
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LogComponentEnable("Socket", LOG_LEVEL_ALL);
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LogComponentEnable("UdpSocket", LOG_LEVEL_ALL);
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LogComponentEnable("UdpL4Protocol", LOG_LEVEL_ALL);
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LogComponentEnable("Ipv4L3Protocol", LOG_LEVEL_ALL);
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LogComponentEnable("Ipv4StaticRouting", LOG_LEVEL_ALL);
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LogComponentEnable("Ipv4Interface", LOG_LEVEL_ALL);
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LogComponentEnable("ArpIpv4Interface", LOG_LEVEL_ALL);
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LogComponentEnable("Ipv4LoopbackInterface", LOG_LEVEL_ALL);
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LogComponentEnable("OnOffApplication", LOG_LEVEL_ALL);
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LogComponentEnable("PacketSinkApplication", LOG_LEVEL_ALL);
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LogComponentEnable("UdpEchoClientApplication", LOG_LEVEL_ALL);
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LogComponentEnable("UdpEchoServerApplication", LOG_LEVEL_ALL);
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#endif
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// Set up some default values for the simulation. Use the
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// DefaultValue::Bind () technique to tell the system what subclass of
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// Queue to use, and what the queue limit is
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// The below Bind command tells the queue factory which class to
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// instantiate, when the queue factory is invoked in the topology code
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DefaultValue::Bind ("Queue", "DropTailQueue");
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DefaultValue::Bind ("OnOffApplicationPacketSize", "210");
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DefaultValue::Bind ("OnOffApplicationDataRate", "300b/s");
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// The below metric, if set to 3 or higher, will cause packets between
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// n1 and n3 to take the 2-hop route through n2
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//
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// Additionally, we plumb this metric into the default value / command
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// line argument system as well, for exemplary purposes. This means
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// that it can be resettable at the command-line to the program,
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// rather than recompiling
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// e.g. waf --run "simple-alternate-routing --AlternateCost=5"
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uint16_t sampleMetric = 1;
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CommandLine::AddArgValue ("AlternateCost",
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"This metric is used in the example script between n3 and n1 ",
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sampleMetric);
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// Allow the user to override any of the defaults and the above
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// DefaultValue::Bind ()s at run-time, via command-line arguments
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CommandLine::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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Ptr<Node> n0 = Create<InternetNode> ();
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Ptr<Node> n1 = Create<InternetNode> ();
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Ptr<Node> n2 = Create<InternetNode> ();
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Ptr<Node> n3 = Create<InternetNode> ();
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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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Ptr<PointToPointChannel> channel0 =
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PointToPointTopology::AddPointToPointLink (
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n0, n2, DataRate (5000000), MilliSeconds (2));
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Ptr<PointToPointChannel> channel1 =
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PointToPointTopology::AddPointToPointLink (
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n1, n2, DataRate (5000000), MilliSeconds (2));
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Ptr<PointToPointChannel> channel2 =
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PointToPointTopology::AddPointToPointLink (
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n2, n3, DataRate (1500000), MilliSeconds (10));
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Ptr<PointToPointChannel> channel3 =
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PointToPointTopology::AddPointToPointLink (
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n1, n3, DataRate (1500000), MilliSeconds (100));
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// Later, we add IP addresses. The middle two octets correspond to
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// the channel number.
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NS_LOG_INFO ("Assign IP Addresses.");
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PointToPointTopology::AddIpv4Addresses (
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channel0, n0, Ipv4Address ("10.0.0.1"),
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n2, Ipv4Address ("10.0.0.2"));
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PointToPointTopology::AddIpv4Addresses (
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channel1, n1, Ipv4Address ("10.1.1.1"),
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n2, Ipv4Address ("10.1.1.2"));
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PointToPointTopology::AddIpv4Addresses (
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channel2, n2, Ipv4Address ("10.2.2.1"),
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n3, Ipv4Address ("10.2.2.2"));
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PointToPointTopology::AddIpv4Addresses (
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channel3, n1, Ipv4Address ("10.3.3.1"),
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n3, Ipv4Address ("10.3.3.2"));
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PointToPointTopology::SetIpv4Metric (
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channel3, n1, n3, sampleMetric);
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// Create router nodes, initialize routing database and set up the routing
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// tables in the nodes.
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GlobalRouteManager::PopulateRoutingTables ();
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// Create the OnOff application to send UDP datagrams
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NS_LOG_INFO ("Create Application.");
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uint16_t port = 9; // Discard port (RFC 863)
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// Create a flow from n3 to n1, starting at time 1.1 seconds
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Ptr<OnOffApplication> ooff = Create<OnOffApplication> (
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n3,
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InetSocketAddress ("10.1.1.1", port),
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"Udp",
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ConstantVariable (1),
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ConstantVariable (0));
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// Start the application
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ooff->Start (Seconds (1.1));
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ooff->Stop (Seconds (10.0));
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// Create a packet sink to receive these packets
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Ptr<PacketSink> sink = Create<PacketSink> (
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n1,
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InetSocketAddress (Ipv4Address::GetAny (), port),
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"Udp");
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// Start the sink
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sink->Start (Seconds (1.1));
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sink->Stop (Seconds (10.0));
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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 simple-alternate-routing.tr file
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NS_LOG_INFO ("Configure Tracing.");
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AsciiTrace asciitrace ("simple-alternate-routing.tr");
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asciitrace.TraceAllQueues ();
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asciitrace.TraceAllNetDeviceRx ();
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// Also configure some tcpdump traces; each interface will be traced
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// The output files will be named simple-p2p.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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PcapTrace pcaptrace ("simple-alternate-routing.pcap");
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pcaptrace.TraceAllIp ();
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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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