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 // Network topology
18 //
19 // n0 n1 n2 n3
20 // | | | |
21 // =================
22 // LAN
23 //
24 // - UDP flows from n0 to n1 and back
25 // - DropTail queues
26 // - Tracing of queues and packet receptions to file "udp-echo.tr"
27
28 #include <fstream>
29 #include "ns3/core-module.h"
30 #include "ns3/csma-module.h"
31 #include "ns3/applications-module.h"
32 #include "ns3/internet-module.h"
33
34 using namespace ns3;
35
36 NS_LOG_COMPONENT_DEFINE ("RealtimeUdpEchoExample");
37
38 int
main(int argc,char * argv[])39 main (int argc, char *argv[])
40 {
41 //
42 // Allow the user to override any of the defaults and the above Bind() at
43 // run-time, via command-line arguments
44 //
45 CommandLine cmd (__FILE__);
46 cmd.Parse (argc, argv);
47
48 //
49 // But since this is a realtime script, don't allow the user to mess with
50 // that.
51 //
52 GlobalValue::Bind ("SimulatorImplementationType",
53 StringValue ("ns3::RealtimeSimulatorImpl"));
54
55 //
56 // Explicitly create the nodes required by the topology (shown above).
57 //
58 NS_LOG_INFO ("Create nodes.");
59 NodeContainer n;
60 n.Create (4);
61
62 InternetStackHelper internet;
63 internet.Install (n);
64
65 //
66 // Explicitly create the channels required by the topology (shown above).
67 //
68 NS_LOG_INFO ("Create channels.");
69 CsmaHelper csma;
70 csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate (5000000)));
71 csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
72 csma.SetDeviceAttribute ("Mtu", UintegerValue (1400));
73 NetDeviceContainer d = csma.Install (n);
74
75 //
76 // We've got the "hardware" in place. Now we need to add IP addresses.
77 //
78 NS_LOG_INFO ("Assign IP Addresses.");
79 Ipv4AddressHelper ipv4;
80 ipv4.SetBase ("10.1.1.0", "255.255.255.0");
81 Ipv4InterfaceContainer i = ipv4.Assign (d);
82
83 NS_LOG_INFO ("Create Applications.");
84
85 //
86 // Create a UdpEchoServer application on node one.
87 //
88 uint16_t port = 9; // well-known echo port number
89 UdpEchoServerHelper server (port);
90 ApplicationContainer apps = server.Install (n.Get (1));
91 apps.Start (Seconds (1.0));
92 apps.Stop (Seconds (10.0));
93
94 //
95 // Create a UdpEchoClient application to send UDP datagrams from node zero to
96 // node one.
97 //
98 uint32_t packetSize = 1024;
99 uint32_t maxPacketCount = 500;
100 Time interPacketInterval = Seconds (0.01);
101 UdpEchoClientHelper client (i.GetAddress (1), port);
102 client.SetAttribute ("MaxPackets", UintegerValue (maxPacketCount));
103 client.SetAttribute ("Interval", TimeValue (interPacketInterval));
104 client.SetAttribute ("PacketSize", UintegerValue (packetSize));
105 apps = client.Install (n.Get (0));
106 apps.Start (Seconds (2.0));
107 apps.Stop (Seconds (10.0));
108
109 AsciiTraceHelper ascii;
110 csma.EnableAsciiAll (ascii.CreateFileStream ("realtime-udp-echo.tr"));
111 csma.EnablePcapAll ("realtime-udp-echo", false);
112
113 //
114 // Now, do the actual simulation.
115 //
116 Simulator::Stop (Seconds (11.0));
117 NS_LOG_INFO ("Run Simulation.");
118 Simulator::Run ();
119 Simulator::Destroy ();
120 NS_LOG_INFO ("Done.");
121 }
122