author | Gustavo J. A. M. Carneiro <gjc@inescporto.pt> |
Fri, 03 Jul 2009 14:12:28 +0100 | |
changeset 4649 | 189238bfdc7f |
parent 4616 | a84f60b6cd12 |
permissions | -rw-r--r-- |
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/* -*- 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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// |
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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/core-module.h" |
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#include "ns3/simulator-module.h" |
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#include "ns3/node-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 ("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("GlobalRoutingHelper", LOG_LOGIC); |
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LogComponentEnable("GlobalRouter", LOG_LOGIC); |
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#endif |
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Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (210)); |
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Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("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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CommandLine cmd; |
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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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cmd.AddValue ("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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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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NodeContainer n1n3 = NodeContainer (c.Get (1), c.Get (3)); |
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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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94 |
PointToPointHelper p2p; |
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p2p.SetDeviceAttribute ("DataRate", StringValue ("5Mbps")); |
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96 |
p2p.SetChannelAttribute ("Delay", StringValue ("2ms")); |
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97 |
NetDeviceContainer d0d2 = p2p.Install (n0n2); |
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98 |
|
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99 |
NetDeviceContainer d1d2 = p2p.Install (n1n2); |
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100 |
|
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101 |
p2p.SetDeviceAttribute ("DataRate", StringValue ("1500kbps")); |
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102 |
p2p.SetChannelAttribute ("Delay", StringValue ("10ms")); |
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103 |
NetDeviceContainer d3d2 = p2p.Install (n3n2); |
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104 |
|
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105 |
p2p.SetChannelAttribute ("Delay", StringValue ("100ms")); |
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106 |
NetDeviceContainer d1d3 = p2p.Install (n1n3); |
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107 |
|
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108 |
InternetStackHelper internet; |
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109 |
internet.Install (c); |
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110 |
|
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111 |
// Later, we add IP addresses. The middle two octets correspond to |
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112 |
// the channel number. |
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113 |
NS_LOG_INFO ("Assign IP Addresses."); |
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114 |
Ipv4AddressHelper ipv4; |
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115 |
ipv4.SetBase ("10.0.0.0", "255.255.255.0"); |
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116 |
ipv4.Assign (d0d2); |
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117 |
|
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118 |
ipv4.SetBase ("10.1.1.0", "255.255.255.0"); |
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119 |
Ipv4InterfaceContainer i1i2 = ipv4.Assign (d1d2); |
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120 |
|
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121 |
ipv4.SetBase ("10.2.2.0", "255.255.255.0"); |
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122 |
ipv4.Assign (d3d2); |
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123 |
|
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124 |
ipv4.SetBase ("10.3.3.0", "255.255.255.0"); |
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125 |
Ipv4InterfaceContainer i1i3 = ipv4.Assign (d1d3); |
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126 |
|
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127 |
i1i3.SetMetric (0, sampleMetric); |
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128 |
i1i3.SetMetric (1, sampleMetric); |
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129 |
|
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130 |
// Create router nodes, initialize routing database and set up the routing |
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131 |
// tables in the nodes. |
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132 |
Ipv4GlobalRoutingHelper::PopulateRoutingTables (); |
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133 |
|
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134 |
// Create the OnOff application to send UDP datagrams |
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135 |
NS_LOG_INFO ("Create Application."); |
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136 |
uint16_t port = 9; // Discard port (RFC 863) |
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137 |
|
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138 |
// Create a flow from n3 to n1, starting at time 1.1 seconds |
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139 |
OnOffHelper onoff ("ns3::UdpSocketFactory", |
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140 |
Address (InetSocketAddress (i1i2.GetAddress (0), port))); |
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141 |
onoff.SetAttribute ("OnTime", RandomVariableValue (ConstantVariable (1))); |
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142 |
onoff.SetAttribute ("OffTime", RandomVariableValue (ConstantVariable (0))); |
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143 |
|
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144 |
ApplicationContainer apps = onoff.Install (c.Get (3)); |
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145 |
apps.Start (Seconds (1.1)); |
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146 |
apps.Stop (Seconds (10.0)); |
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147 |
|
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148 |
// Create a packet sink to receive these packets |
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149 |
PacketSinkHelper sink ("ns3::UdpSocketFactory", |
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150 |
Address (InetSocketAddress (Ipv4Address::GetAny (), port))); |
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151 |
apps = sink.Install (c.Get (1)); |
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152 |
apps.Start (Seconds (1.1)); |
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153 |
apps.Stop (Seconds (10.0)); |
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154 |
|
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155 |
std::ofstream ascii; |
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156 |
ascii.open ("simple-alternate-routing.tr"); |
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EnablePcap()->EnablePcapAll(); EnableAscii()->EnableAsciiAll()
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157 |
PointToPointHelper::EnablePcapAll ("simple-alternate-routing"); |
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EnablePcap()->EnablePcapAll(); EnableAscii()->EnableAsciiAll()
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158 |
PointToPointHelper::EnableAsciiAll (ascii); |
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159 |
|
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|
160 |
NS_LOG_INFO ("Run Simulation."); |
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161 |
Simulator::Run (); |
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162 |
Simulator::Destroy (); |
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163 |
NS_LOG_INFO ("Done."); |
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164 |
|
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165 |
return 0; |
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166 |
} |