A Discrete-Event Network Simulator
API
tcp-pcap-nanosec-example.cc
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2/*
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15 */
16
17// ============================================================ //
18// BASED ON tcp-bulk-send.cc //
19// ============================================================ //
20
21// Network topology
22//
23// n0 ----------- n1
24// 500 Kbps
25// 5 ms
26//
27// - Flow from n0 to n1 using BulkSendApplication.
28// - Tracing of queues and packet receptions to file "tcp-pcap-nanosec-example.pcap"
29// when tracing is turned on.
30// - Trace file timestamps are recorded in nanoseconds, when requested
31//
32
33
34// ============================================================ //
35// NOTE: You can check the "magic" number of a pcap file with //
36// the following command: //
37// //
38// od -N4 -tx1 filename.pcap //
39// //
40// ============================================================ //
41
42#include <string>
43#include <fstream>
44#include "ns3/core-module.h"
45#include "ns3/point-to-point-module.h"
46#include "ns3/internet-module.h"
47#include "ns3/applications-module.h"
48#include "ns3/network-module.h"
49
50using namespace ns3;
51
52NS_LOG_COMPONENT_DEFINE ("TcpPcapNanosecExample");
53
54int
55main (int argc, char *argv[])
56{
57
58 bool tracing = false;
59 bool nanosec = false;
60 uint32_t maxBytes = 0;
61
62//
63// Allow the user to override any of the defaults at
64// run-time, via command-line arguments
65//
66 CommandLine cmd (__FILE__);
67 cmd.AddValue ("tracing", "Flag to enable tracing", tracing);
68 cmd.AddValue ("nanosec", "Flag to use nanosecond timestamps for pcap as default", nanosec);
69 cmd.AddValue ("maxBytes",
70 "Total number of bytes for application to send", maxBytes);
71 cmd.Parse (argc, argv);
72
73//
74// If requested via the --nanosec cmdline flag, generate nanosecond timestamp for pcap traces
75//
76 if (nanosec)
77 {
78 Config::SetDefault ("ns3::PcapFileWrapper::NanosecMode", BooleanValue (true));
79 }
80
81//
82// Explicitly create the nodes required by the topology (shown above).
83//
84 NS_LOG_INFO ("Create nodes.");
86 nodes.Create (2);
87
88 NS_LOG_INFO ("Create channels.");
89
90//
91// Explicitly create the point-to-point link required by the topology (shown above).
92//
94 pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("500Kbps"));
95 pointToPoint.SetChannelAttribute ("Delay", StringValue ("5ms"));
96
98 devices = pointToPoint.Install (nodes);
99
100//
101// Install the internet stack on the nodes
102//
103 InternetStackHelper internet;
104 internet.Install (nodes);
105
106//
107// We've got the "hardware" in place. Now we need to add IP addresses.
108//
109 NS_LOG_INFO ("Assign IP Addresses.");
111 ipv4.SetBase ("10.1.1.0", "255.255.255.0");
113
114 NS_LOG_INFO ("Create Applications.");
115
116//
117// Create a BulkSendApplication and install it on node 0
118//
119 uint16_t port = 9; // well-known echo port number
120
121
122 BulkSendHelper source ("ns3::TcpSocketFactory",
124 // Set the amount of data to send in bytes. Zero is unlimited.
125 source.SetAttribute ("MaxBytes", UintegerValue (maxBytes));
126 ApplicationContainer sourceApps = source.Install (nodes.Get (0));
127 sourceApps.Start (Seconds (0.0));
128 sourceApps.Stop (Seconds (10.0));
129
130//
131// Create a PacketSinkApplication and install it on node 1
132//
133 PacketSinkHelper sink ("ns3::TcpSocketFactory",
134 InetSocketAddress (Ipv4Address::GetAny (), port));
135 ApplicationContainer sinkApps = sink.Install (nodes.Get (1));
136 sinkApps.Start (Seconds (0.0));
137 sinkApps.Stop (Seconds (10.0));
138
139//
140// Set up tracing if enabled
141//
142 if (tracing)
143 {
144 AsciiTraceHelper ascii;
145 pointToPoint.EnablePcapAll ("tcp-pcap-nanosec-example", false);
146 }
147
148//
149// Now, do the actual simulation.
150//
151 NS_LOG_INFO ("Run Simulation.");
152 Simulator::Stop (Seconds (10.0));
153 Simulator::Run ();
154 Simulator::Destroy ();
155 NS_LOG_INFO ("Done.");
156
157 Ptr<PacketSink> sink1 = DynamicCast<PacketSink> (sinkApps.Get (0));
158 std::cout << "Total Bytes Received: " << sink1->GetTotalRx () << std::endl;
159}
holds a vector of ns3::Application pointers.
Ptr< Application > Get(uint32_t i) const
Get the Ptr<Application> stored in this container at a given index.
void Start(Time start)
Arrange for all of the Applications in this container to Start() at the Time given as a parameter.
void Stop(Time stop)
Arrange for all of the Applications in this container to Stop() at the Time given as a parameter.
Manage ASCII trace files for device models.
Definition: trace-helper.h:163
AttributeValue implementation for Boolean.
Definition: boolean.h:37
A helper to make it easier to instantiate an ns3::BulkSendApplication on a set of nodes.
Parse command-line arguments.
Definition: command-line.h:229
an Inet address class
aggregate IP/TCP/UDP functionality to existing Nodes.
void Install(std::string nodeName) const
Aggregate implementations of the ns3::Ipv4, ns3::Ipv6, ns3::Udp, and ns3::Tcp classes onto the provid...
A helper class to make life easier while doing simple IPv4 address assignment in scripts.
void SetBase(Ipv4Address network, Ipv4Mask mask, Ipv4Address base="0.0.0.1")
Set the base network number, network mask and base address.
Ipv4InterfaceContainer Assign(const NetDeviceContainer &c)
Assign IP addresses to the net devices specified in the container based on the current network prefix...
holds a vector of std::pair of Ptr<Ipv4> and interface index.
Ipv4Address GetAddress(uint32_t i, uint32_t j=0) const
holds a vector of ns3::NetDevice pointers
keep track of a set of node pointers.
A helper to make it easier to instantiate an ns3::PacketSinkApplication on a set of nodes.
uint64_t GetTotalRx() const
Definition: packet-sink.cc:93
Build a set of PointToPointNetDevice objects.
Hold variables of type string.
Definition: string.h:41
Hold an unsigned integer type.
Definition: uinteger.h:44
uint16_t port
Definition: dsdv-manet.cc:45
void SetDefault(std::string name, const AttributeValue &value)
Definition: config.cc:849
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:205
#define NS_LOG_INFO(msg)
Use NS_LOG to output a message of level LOG_INFO.
Definition: log.h:281
Time Seconds(double value)
Construct a Time in the indicated unit.
Definition: nstime.h:1244
pointToPoint
Definition: first.py:35
devices
Definition: first.py:39
nodes
Definition: first.py:32
Every class exported by the ns3 library is enclosed in the ns3 namespace.
cmd
Definition: second.py:35
bool tracing
Flag to enable/disable generation of tracing files.
Definition: wifi-bianchi.cc:88
Ptr< PacketSink > sink
Definition: wifi-tcp.cc:56