A Discrete-Event Network Simulator
API
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csma-broadcast.cc
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1/*
2 * SPDX-License-Identifier: GPL-2.0-only
3 */
4
5//
6// Example of the sending of a datagram to a broadcast address
7//
8// Network topology
9// ==============
10// | |
11// n0 n1 n2
12// | |
13// ==========
14//
15// n0 originates UDP broadcast to 255.255.255.255/discard port, which
16// is replicated and received on both n1 and n2
17
18#include "ns3/applications-module.h"
19#include "ns3/core-module.h"
20#include "ns3/csma-module.h"
21#include "ns3/internet-module.h"
22#include "ns3/network-module.h"
23
24#include <cassert>
25#include <fstream>
26#include <iostream>
27#include <string>
28
29using namespace ns3;
30
31NS_LOG_COMPONENT_DEFINE("CsmaBroadcastExample");
32
33int
34main(int argc, char* argv[])
35{
36 // Users may find it convenient to turn on explicit debugging
37 // for selected modules; the below lines suggest how to do this
38#if 0
39 LogComponentEnable ("CsmaBroadcastExample", LOG_LEVEL_INFO);
40#endif
41 LogComponentEnable("CsmaBroadcastExample", LOG_PREFIX_TIME);
42
43 // Allow the user to override any of the defaults and the above
44 // Bind()s at run-time, via command-line arguments
45 CommandLine cmd(__FILE__);
46 cmd.Parse(argc, argv);
47
48 NS_LOG_INFO("Create nodes.");
50 c.Create(3);
51 NodeContainer c0 = NodeContainer(c.Get(0), c.Get(1));
52 NodeContainer c1 = NodeContainer(c.Get(0), c.Get(2));
53
54 NS_LOG_INFO("Build Topology.");
56 csma.SetChannelAttribute("DataRate", DataRateValue(DataRate(5000000)));
57 csma.SetChannelAttribute("Delay", TimeValue(MilliSeconds(2)));
58
59 NetDeviceContainer n0 = csma.Install(c0);
60 NetDeviceContainer n1 = csma.Install(c1);
61
63 internet.Install(c);
64
65 NS_LOG_INFO("Assign IP Addresses.");
67 ipv4.SetBase("10.1.0.0", "255.255.255.0");
68 ipv4.Assign(n0);
69 ipv4.SetBase("192.168.1.0", "255.255.255.0");
70 ipv4.Assign(n1);
71
72 // RFC 863 discard port ("9") indicates packet should be thrown away
73 // by the system. We allow this silent discard to be overridden
74 // by the PacketSink application.
75 uint16_t port = 9;
76
77 // Create the OnOff application to send UDP datagrams of size
78 // 512 bytes (default) at a rate of 500 Kb/s (default) from n0
79 NS_LOG_INFO("Create Applications.");
80 OnOffHelper onoff("ns3::UdpSocketFactory",
81 Address(InetSocketAddress(Ipv4Address("255.255.255.255"), port)));
82 onoff.SetConstantRate(DataRate("500kb/s"));
83
84 ApplicationContainer app = onoff.Install(c0.Get(0));
85 // Start the application
86 app.Start(Seconds(1.0));
87 app.Stop(Seconds(10.0));
88
89 // Create an optional packet sink to receive these packets
90 PacketSinkHelper sink("ns3::UdpSocketFactory",
92 app = sink.Install(c0.Get(1));
93 app.Add(sink.Install(c1.Get(1)));
94 app.Start(Seconds(1.0));
95 app.Stop(Seconds(10.0));
96
97 // Configure ascii tracing of all enqueue, dequeue, and NetDevice receive
98 // events on all devices. Trace output will be sent to the file
99 // "csma-one-subnet.tr"
100 AsciiTraceHelper ascii;
101 csma.EnableAsciiAll(ascii.CreateFileStream("csma-broadcast.tr"));
102
103 // Also configure some tcpdump traces; each interface will be traced
104 // The output files will be named
105 // csma-broadcast-<nodeId>-<interfaceId>.pcap
106 // and can be read by the "tcpdump -tt -r" command
107 csma.EnablePcapAll("csma-broadcast", false);
108
109 NS_LOG_INFO("Run Simulation.");
112 NS_LOG_INFO("Done.");
113
114 return 0;
115}
a polymophic address class
Definition address.h:90
holds a vector of ns3::Application pointers.
Manage ASCII trace files for device models.
Ptr< OutputStreamWrapper > CreateFileStream(std::string filename, std::ios::openmode filemode=std::ios::out)
Create and initialize an output stream object we'll use to write the traced bits.
Parse command-line arguments.
build a set of CsmaNetDevice objects
Definition csma-helper.h:37
Class for representing data rates.
Definition data-rate.h:78
an Inet address class
aggregate IP/TCP/UDP functionality to existing Nodes.
A helper class to make life easier while doing simple IPv4 address assignment in scripts.
Ipv4 addresses are stored in host order in this class.
static Ipv4Address GetAny()
holds a vector of ns3::NetDevice pointers
keep track of a set of node pointers.
void Create(uint32_t n)
Create n nodes and append pointers to them to the end of this NodeContainer.
Ptr< Node > Get(uint32_t i) const
Get the Ptr<Node> stored in this container at a given index.
A helper to make it easier to instantiate an ns3::OnOffApplication on a set of nodes.
A helper to make it easier to instantiate an ns3::PacketSinkApplication on a set of nodes.
static void Destroy()
Execute the events scheduled with ScheduleDestroy().
Definition simulator.cc:131
static void Run()
Run the simulation.
Definition simulator.cc:167
uint16_t port
Definition dsdv-manet.cc:33
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition log.h:191
#define NS_LOG_INFO(msg)
Use NS_LOG to output a message of level LOG_INFO.
Definition log.h:264
Time Seconds(double value)
Construct a Time in the indicated unit.
Definition nstime.h:1308
Time MilliSeconds(uint64_t value)
Construct a Time in the indicated unit.
Definition nstime.h:1320
Every class exported by the ns3 library is enclosed in the ns3 namespace.
void LogComponentEnable(const std::string &name, LogLevel level)
Enable the logging output associated with that log component.
Definition log.cc:291
@ LOG_PREFIX_TIME
Prefix all trace prints with simulation time.
Definition log.h:108
@ LOG_LEVEL_INFO
LOG_INFO and above.
Definition log.h:93
Ptr< PacketSink > sink
Pointer to the packet sink application.
Definition wifi-tcp.cc:44