A Discrete-Event Network Simulator
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udp-echo.cc
Go to the documentation of this file.
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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// Network topology
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//
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// n0 n1 n2 n3
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// | | | |
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// =================
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// LAN
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//
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// - UDP flows from n0 to n1 and back
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// - DropTail queues
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// - Tracing of queues and packet receptions to file "udp-echo.tr"
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#include <fstream>
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#include "ns3/core-module.h"
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#include "ns3/csma-module.h"
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#include "ns3/applications-module.h"
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#include "ns3/internet-module.h"
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using namespace
ns3;
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NS_LOG_COMPONENT_DEFINE
(
"UdpEchoExample"
);
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int
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main
(
int
argc,
char
*argv[])
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{
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//
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// Users may find it convenient to turn on explicit debugging
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// for selected modules; the below lines suggest how to do this
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//
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#if 0
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LogComponentEnable
(
"UdpEchoExample"
,
LOG_LEVEL_INFO
);
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LogComponentEnable
(
"UdpEchoClientApplication"
,
LOG_LEVEL_ALL
);
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LogComponentEnable
(
"UdpEchoServerApplication"
,
LOG_LEVEL_ALL
);
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#endif
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//
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// Allow the user to override any of the defaults and the above Bind() at
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// run-time, via command-line arguments
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//
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bool
useV6 =
false
;
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Address
serverAddress;
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CommandLine
cmd;
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cmd.
AddValue
(
"useIpv6"
,
"Use Ipv6"
, useV6);
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cmd.
Parse
(argc, argv);
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//
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// Explicitly create the nodes required by the topology (shown above).
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//
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NS_LOG_INFO
(
"Create nodes."
);
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NodeContainer
n;
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n.
Create
(4);
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InternetStackHelper
internet;
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internet.
Install
(n);
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NS_LOG_INFO
(
"Create channels."
);
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//
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// Explicitly create the channels required by the topology (shown above).
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//
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CsmaHelper
csma;
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csma.
SetChannelAttribute
(
"DataRate"
,
DataRateValue
(
DataRate
(5000000)));
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csma.
SetChannelAttribute
(
"Delay"
,
TimeValue
(MilliSeconds (2)));
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csma.
SetDeviceAttribute
(
"Mtu"
,
UintegerValue
(1400));
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NetDeviceContainer
d = csma.
Install
(n);
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//
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// We've got the "hardware" in place. Now we need to add IP addresses.
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//
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NS_LOG_INFO
(
"Assign IP Addresses."
);
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if
(useV6 ==
false
)
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{
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Ipv4AddressHelper
ipv4;
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ipv4.
SetBase
(
"10.1.1.0"
,
"255.255.255.0"
);
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Ipv4InterfaceContainer
i = ipv4.
Assign
(d);
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serverAddress =
Address
(i.
GetAddress
(1));
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}
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else
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{
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Ipv6AddressHelper
ipv6;
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ipv6.
SetBase
(
"2001:0000:f00d:cafe::"
,
Ipv6Prefix
(64));
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Ipv6InterfaceContainer
i6 = ipv6.
Assign
(d);
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serverAddress =
Address
(i6.
GetAddress
(1,1));
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}
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NS_LOG_INFO
(
"Create Applications."
);
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//
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// Create a UdpEchoServer application on node one.
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//
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uint16_t
port
= 9;
// well-known echo port number
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UdpEchoServerHelper
server (port);
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ApplicationContainer
apps = server.
Install
(n.
Get
(1));
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apps.
Start
(Seconds (1.0));
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apps.
Stop
(Seconds (10.0));
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//
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// Create a UdpEchoClient application to send UDP datagrams from node zero to
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// node one.
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//
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uint32_t packetSize = 1024;
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uint32_t maxPacketCount = 1;
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Time
interPacketInterval = Seconds (1.);
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UdpEchoClientHelper
client (serverAddress, port);
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client.
SetAttribute
(
"MaxPackets"
,
UintegerValue
(maxPacketCount));
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client.
SetAttribute
(
"Interval"
,
TimeValue
(interPacketInterval));
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client.
SetAttribute
(
"PacketSize"
,
UintegerValue
(packetSize));
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apps = client.
Install
(n.
Get
(0));
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apps.
Start
(Seconds (2.0));
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apps.
Stop
(Seconds (10.0));
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#if 0
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//
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// Users may find it convenient to initialize echo packets with actual data;
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// the below lines suggest how to do this
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//
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client.
SetFill
(apps.
Get
(0),
"Hello World"
);
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client.
SetFill
(apps.
Get
(0), 0xa5, 1024);
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uint8_t fill[] = { 0, 1, 2, 3, 4, 5, 6};
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client.
SetFill
(apps.
Get
(0), fill,
sizeof
(fill), 1024);
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#endif
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AsciiTraceHelper
ascii;
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csma.
EnableAsciiAll
(ascii.
CreateFileStream
(
"udp-echo.tr"
));
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csma.
EnablePcapAll
(
"udp-echo"
,
false
);
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//
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// Now, do the actual simulation.
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//
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NS_LOG_INFO
(
"Run Simulation."
);
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Simulator::Run
();
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Simulator::Destroy
();
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NS_LOG_INFO
(
"Done."
);
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}
examples
udp
udp-echo.cc
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