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csma-packet-socket.cc
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
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15  */
16 
17 //
18 // Network topology
19 //
20 // n0 n1 n2 n3
21 // | | | |
22 // =====================
23 //
24 // - Two packet socket flows: from n0 to n1 and from n3 to n0
25 // - Default 512 byte packets generated by traffic generator
26 // - Output from the PacketSink trace source will be sent to the
27 // csma-packet-socket-sink.tr file
28 // ASCII trace output will be sent to the csma-packet-socket.tr file
29 
30 #include <iostream>
31 #include <fstream>
32 #include <string>
33 #include <cassert>
34 
35 #include "ns3/core-module.h"
36 #include "ns3/network-module.h"
37 #include "ns3/csma-module.h"
38 #include "ns3/applications-module.h"
39 
40 using namespace ns3;
41 
42 NS_LOG_COMPONENT_DEFINE ("CsmaPacketSocketExample");
43 
44 std::ofstream g_os;
45 
46 static void
47 SinkRx (std::string path, Ptr<const Packet> p, const Address &address)
48 {
49  g_os << p->GetSize () << std::endl;
50 }
51 
52 int
53 main (int argc, char *argv[])
54 {
55 #if 0
56  LogComponentEnable ("CsmaPacketSocketExample", LOG_LEVEL_INFO);
57 #endif
58 
59  CommandLine cmd;
60  cmd.Parse (argc, argv);
61 
62  g_os.open ("csma-packet-socket-sink.tr",std::ios_base::binary | std::ios_base::out);
63 
64  // Here, we will explicitly create four nodes.
65  NS_LOG_INFO ("Create nodes.");
66  NodeContainer nodes;
67  nodes.Create (4);
68 
69  PacketSocketHelper packetSocket;
70  packetSocket.Install (nodes);
71 
72  // create the shared medium used by all csma devices.
73  NS_LOG_INFO ("Create channels.");
74  Ptr<CsmaChannel> channel = CreateObjectWithAttributes<CsmaChannel> (
75  "DataRate", DataRateValue (DataRate (5000000)),
76  "Delay", TimeValue (MilliSeconds (2)));
77 
78  // use a helper function to connect our nodes to the shared channel.
79  NS_LOG_INFO ("Build Topology.");
80  CsmaHelper csma;
81  csma.SetDeviceAttribute ("EncapsulationMode", StringValue ("Llc"));
82  NetDeviceContainer devs = csma.Install (nodes, channel);
83 
84  NS_LOG_INFO ("Create Applications.");
85  // Create the OnOff application to send raw datagrams
86  PacketSocketAddress socket;
87  socket.SetSingleDevice (devs.Get (0)->GetIfIndex ());
88  socket.SetPhysicalAddress (devs.Get (1)->GetAddress ());
89  socket.SetProtocol (2);
90  OnOffHelper onoff ("ns3::PacketSocketFactory", Address (socket));
91  onoff.SetConstantRate (DataRate ("500kb/s"));
92  ApplicationContainer apps = onoff.Install (nodes.Get (0));
93  apps.Start (Seconds (1.0));
94  apps.Stop (Seconds (10.0));
95 
96  socket.SetSingleDevice (devs.Get (3)->GetIfIndex ());
97  socket.SetPhysicalAddress (devs.Get (0)->GetAddress ());
98  socket.SetProtocol (3);
99  onoff.SetAttribute ("Remote", AddressValue (socket));
100  apps = onoff.Install (nodes.Get (3));
101  apps.Start (Seconds (1.0));
102  apps.Stop (Seconds (10.0));
103 
104  // Install packet sink on node 0 to receive packets from node 1
105  PacketSinkHelper sink = PacketSinkHelper ("ns3::PacketSocketFactory",
106  socket);
107  apps = sink.Install (nodes.Get (0));
108  apps.Start (Seconds (0.0));
109  apps.Stop (Seconds (20.0));
110 
111  // While the below trace sink is hooked to all nodes (the wildcard "*")
112  // only one packet sink (on node 0) is actually added above, so
113  // only the receive events on node 0 will be traced
114  Config::Connect ("/NodeList/*/ApplicationList/*/$ns3::PacketSink/Rx",
115  MakeCallback (&SinkRx));
116 
117  // Configure tracing of all enqueue, dequeue, and NetDevice receive events
118  // Trace output will be sent to the csma-packet-socket.tr file
119  NS_LOG_INFO ("Configure Tracing.");
120 
121  AsciiTraceHelper ascii;
122  csma.EnableAsciiAll (ascii.CreateFileStream ("csma-packet-socket.tr"));
123 
124  NS_LOG_INFO ("Run Simulation.");
125  Simulator::Run ();
126  Simulator::Destroy ();
127  NS_LOG_INFO ("Done.");
128 
129  g_os.close ();
130 
131  return 0;
132 }