A Discrete-Event Network Simulator
API
udp-echo.cc
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2/*
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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
34using namespace ns3;
35
36NS_LOG_COMPONENT_DEFINE ("UdpEchoExample");
37
38int
39main (int argc, char *argv[])
40{
41//
42// Users may find it convenient to turn on explicit debugging
43// for selected modules; the below lines suggest how to do this
44//
45#if 0
46 LogComponentEnable ("UdpEchoExample", LOG_LEVEL_INFO);
47 LogComponentEnable ("UdpEchoClientApplication", LOG_LEVEL_ALL);
48 LogComponentEnable ("UdpEchoServerApplication", LOG_LEVEL_ALL);
49#endif
50//
51// Allow the user to override any of the defaults and the above Bind() at
52// run-time, via command-line arguments
53//
54 bool useV6 = false;
55 Address serverAddress;
56
57 CommandLine cmd (__FILE__);
58 cmd.AddValue ("useIpv6", "Use Ipv6", useV6);
59 cmd.Parse (argc, argv);
60//
61// Explicitly create the nodes required by the topology (shown above).
62//
63 NS_LOG_INFO ("Create nodes.");
65 n.Create (4);
66
67 InternetStackHelper internet;
68 internet.Install (n);
69
70 NS_LOG_INFO ("Create channels.");
71//
72// Explicitly create the channels required by the topology (shown above).
73//
75 csma.SetChannelAttribute ("DataRate", DataRateValue (DataRate (5000000)));
76 csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
77 csma.SetDeviceAttribute ("Mtu", UintegerValue (1400));
78 NetDeviceContainer d = csma.Install (n);
79
80//
81// We've got the "hardware" in place. Now we need to add IP addresses.
82//
83 NS_LOG_INFO ("Assign IP Addresses.");
84 if (useV6 == false)
85 {
87 ipv4.SetBase ("10.1.1.0", "255.255.255.0");
88 Ipv4InterfaceContainer i = ipv4.Assign (d);
89 serverAddress = Address(i.GetAddress (1));
90 }
91 else
92 {
94 ipv6.SetBase ("2001:0000:f00d:cafe::", Ipv6Prefix (64));
95 Ipv6InterfaceContainer i6 = ipv6.Assign (d);
96 serverAddress = Address(i6.GetAddress (1,1));
97 }
98
99 NS_LOG_INFO ("Create Applications.");
100//
101// Create a UdpEchoServer application on node one.
102//
103 uint16_t port = 9; // well-known echo port number
104 UdpEchoServerHelper server (port);
105 ApplicationContainer apps = server.Install (n.Get (1));
106 apps.Start (Seconds (1.0));
107 apps.Stop (Seconds (10.0));
108
109//
110// Create a UdpEchoClient application to send UDP datagrams from node zero to
111// node one.
112//
113 uint32_t packetSize = 1024;
114 uint32_t maxPacketCount = 1;
115 Time interPacketInterval = Seconds (1.);
116 UdpEchoClientHelper client (serverAddress, port);
117 client.SetAttribute ("MaxPackets", UintegerValue (maxPacketCount));
118 client.SetAttribute ("Interval", TimeValue (interPacketInterval));
119 client.SetAttribute ("PacketSize", UintegerValue (packetSize));
120 apps = client.Install (n.Get (0));
121 apps.Start (Seconds (2.0));
122 apps.Stop (Seconds (10.0));
123
124#if 0
125//
126// Users may find it convenient to initialize echo packets with actual data;
127// the below lines suggest how to do this
128//
129 client.SetFill (apps.Get (0), "Hello World");
130
131 client.SetFill (apps.Get (0), 0xa5, 1024);
132
133 uint8_t fill[] = { 0, 1, 2, 3, 4, 5, 6};
134 client.SetFill (apps.Get (0), fill, sizeof(fill), 1024);
135#endif
136
137 AsciiTraceHelper ascii;
138 csma.EnableAsciiAll (ascii.CreateFileStream ("udp-echo.tr"));
139 csma.EnablePcapAll ("udp-echo", false);
140
141//
142// Now, do the actual simulation.
143//
144 NS_LOG_INFO ("Run Simulation.");
145 Simulator::Run ();
146 Simulator::Destroy ();
147 NS_LOG_INFO ("Done.");
148}
a polymophic address class
Definition: address.h:91
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
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.
Definition: command-line.h:229
build a set of CsmaNetDevice objects
Definition: csma-helper.h:47
Class for representing data rates.
Definition: data-rate.h:89
AttributeValue implementation for DataRate.
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
Helper class to auto-assign global IPv6 unicast addresses.
void SetBase(Ipv6Address network, Ipv6Prefix prefix, Ipv6Address base=Ipv6Address("::1"))
Set the base network number, network prefix, and base interface ID.
Ipv6InterfaceContainer Assign(const NetDeviceContainer &c)
Allocate an Ipv6InterfaceContainer with auto-assigned addresses.
Keep track of a set of IPv6 interfaces.
Ipv6Address GetAddress(uint32_t i, uint32_t j) const
Get the address for the specified index.
Describes an IPv6 prefix.
Definition: ipv6-address.h:456
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.
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:103
AttributeValue implementation for Time.
Definition: nstime.h:1308
Create an application which sends a UDP packet and waits for an echo of this packet.
Create a server application which waits for input UDP packets and sends them back to the original sen...
Hold an unsigned integer type.
Definition: uinteger.h:44
uint16_t port
Definition: dsdv-manet.cc:45
#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
Time MilliSeconds(uint64_t value)
Construct a Time in the indicated unit.
Definition: nstime.h:1252
Every class exported by the ns3 library is enclosed in the ns3 namespace.
@ LOG_LEVEL_ALL
Print everything.
Definition: log.h:116
@ LOG_LEVEL_INFO
LOG_INFO and above.
Definition: log.h:107
void LogComponentEnable(char const *name, enum LogLevel level)
Enable the logging output associated with that log component.
Definition: log.cc:361
csma
Definition: second.py:63
cmd
Definition: second.py:35
static const uint32_t packetSize
Packet size generated at the AP.