A Discrete-Event Network Simulator
API
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Properties Friends Macros Groups Pages
star.cc
Go to the documentation of this file.
1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * This program is free software; you can redistribute it and/or modify
4  * it under the terms of the GNU General Public License version 2 as
5  * published by the Free Software Foundation;
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * along with this program; if not, write to the Free Software
14  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15  *
16  */
17 
18 #include "ns3/core-module.h"
19 #include "ns3/network-module.h"
20 #include "ns3/netanim-module.h"
21 #include "ns3/internet-module.h"
22 #include "ns3/point-to-point-module.h"
23 #include "ns3/applications-module.h"
24 #include "ns3/point-to-point-layout-module.h"
25 
26 // Network topology (default)
27 //
28 // n2 n3 n4 .
29 // \ | / .
30 // \|/ .
31 // n1--- n0---n5 .
32 // /|\ .
33 // / | \ .
34 // n8 n7 n6 .
35 //
36 
37 
38 using namespace ns3;
39 
40 NS_LOG_COMPONENT_DEFINE ("Star");
41 
42 int
43 main (int argc, char *argv[])
44 {
45 
46  //
47  // Set up some default values for the simulation.
48  //
49  Config::SetDefault ("ns3::OnOffApplication::PacketSize", UintegerValue (137));
50 
51  // ??? try and stick 15kb/s into the data rate
52  Config::SetDefault ("ns3::OnOffApplication::DataRate", StringValue ("14kb/s"));
53 
54  //
55  // Default number of nodes in the star. Overridable by command line argument.
56  //
57  uint32_t nSpokes = 8;
58 
59  CommandLine cmd;
60  cmd.AddValue ("nSpokes", "Number of nodes to place in the star", nSpokes);
61  cmd.Parse (argc, argv);
62 
63  NS_LOG_INFO ("Build star topology.");
64  PointToPointHelper pointToPoint;
65  pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));
66  pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));
67  PointToPointStarHelper star (nSpokes, pointToPoint);
68 
69  NS_LOG_INFO ("Install internet stack on all nodes.");
70  InternetStackHelper internet;
71  star.InstallStack (internet);
72 
73  NS_LOG_INFO ("Assign IP Addresses.");
74  star.AssignIpv4Addresses (Ipv4AddressHelper ("10.1.1.0", "255.255.255.0"));
75 
76  NS_LOG_INFO ("Create applications.");
77  //
78  // Create a packet sink on the star "hub" to receive packets.
79  //
80  uint16_t port = 50000;
81  Address hubLocalAddress (InetSocketAddress (Ipv4Address::GetAny (), port));
82  PacketSinkHelper packetSinkHelper ("ns3::TcpSocketFactory", hubLocalAddress);
83  ApplicationContainer hubApp = packetSinkHelper.Install (star.GetHub ());
84  hubApp.Start (Seconds (1.0));
85  hubApp.Stop (Seconds (10.0));
86 
87  //
88  // Create OnOff applications to send TCP to the hub, one on each spoke node.
89  //
90  OnOffHelper onOffHelper ("ns3::TcpSocketFactory", Address ());
91  onOffHelper.SetAttribute ("OnTime", StringValue ("ns3::ConstantRandomVariable[Constant=1]"));
92  onOffHelper.SetAttribute ("OffTime", StringValue ("ns3::ConstantRandomVariable[Constant=0]"));
93 
94  ApplicationContainer spokeApps;
95 
96  for (uint32_t i = 0; i < star.SpokeCount (); ++i)
97  {
98  AddressValue remoteAddress (InetSocketAddress (star.GetHubIpv4Address (i), port));
99  onOffHelper.SetAttribute ("Remote", remoteAddress);
100  spokeApps.Add (onOffHelper.Install (star.GetSpokeNode (i)));
101  }
102  spokeApps.Start (Seconds (1.0));
103  spokeApps.Stop (Seconds (10.0));
104 
105  NS_LOG_INFO ("Enable static global routing.");
106  //
107  // Turn on global static routing so we can actually be routed across the star.
108  //
109  Ipv4GlobalRoutingHelper::PopulateRoutingTables ();
110 
111  NS_LOG_INFO ("Enable pcap tracing.");
112  //
113  // Do pcap tracing on all point-to-point devices on all nodes.
114  //
115  pointToPoint.EnablePcapAll ("star");
116 
117  NS_LOG_INFO ("Run Simulation.");
118  Simulator::Run ();
119  Simulator::Destroy ();
120  NS_LOG_INFO ("Done.");
121 
122  return 0;
123 }