A Discrete-Event Network Simulator
API
realtime-udp-echo.cc
Go to the documentation of this file.
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
34using namespace ns3;
35
36NS_LOG_COMPONENT_DEFINE ("RealtimeUdpEchoExample");
37
38int
39main (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.");
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.");
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.");
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
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}
holds a vector of ns3::Application pointers.
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
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.
Hold variables of type string.
Definition: string.h:41
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.
csma
Definition: second.py:63
cmd
Definition: second.py:35
static const uint32_t packetSize
Packet size generated at the AP.