A Discrete-Event Network Simulator
API
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simple-global-routing.cc
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1/*
2 * SPDX-License-Identifier: GPL-2.0-only
3 *
4 */
5
6//
7// Network topology
8//
9// n0
10// \ 5 Mb/s, 2ms
11// \ 1.5Mb/s, 10ms
12// n2 -------------------------n3
13// /
14// / 5 Mb/s, 2ms
15// n1
16//
17// - all links are point-to-point links with indicated one-way BW/delay
18// - CBR/UDP flows from n0 to n3, and from n3 to n1
19// - FTP/TCP flow from n0 to n3, starting at time 1.2 to time 1.35 sec.
20// - UDP packet size of 210 bytes, with per-packet interval 0.00375 sec.
21// (i.e., DataRate of 448,000 bps)
22// - DropTail queues
23// - Tracing of queues and packet receptions to file "simple-global-routing.tr"
24
25#include "ns3/applications-module.h"
26#include "ns3/core-module.h"
27#include "ns3/flow-monitor-helper.h"
28#include "ns3/internet-module.h"
29#include "ns3/ipv4-global-routing-helper.h"
30#include "ns3/network-module.h"
31#include "ns3/point-to-point-module.h"
32
33#include <cassert>
34#include <fstream>
35#include <iostream>
36#include <string>
37
38using namespace ns3;
39
40NS_LOG_COMPONENT_DEFINE("SimpleGlobalRoutingExample");
41
42int
43main(int argc, char* argv[])
44{
45 // Users may find it convenient to turn on explicit debugging
46 // for selected modules; the below lines suggest how to do this
47#if 0
48 LogComponentEnable ("SimpleGlobalRoutingExample", LOG_LEVEL_INFO);
49#endif
50
51 // Set up some default values for the simulation. Use the
52 Config::SetDefault("ns3::OnOffApplication::PacketSize", UintegerValue(210));
53 Config::SetDefault("ns3::OnOffApplication::DataRate", StringValue("448kb/s"));
54
55 // DefaultValue::Bind ("DropTailQueue::m_maxPackets", 30);
56
57 // Allow the user to override any of the defaults and the above
58 // DefaultValue::Bind ()s at run-time, via command-line arguments
59 CommandLine cmd(__FILE__);
60 bool enableFlowMonitor = false;
61 cmd.AddValue("EnableMonitor", "Enable Flow Monitor", enableFlowMonitor);
62 cmd.Parse(argc, argv);
63
64 // Here, we will explicitly create four nodes. In more sophisticated
65 // topologies, we could configure a node factory.
66 NS_LOG_INFO("Create nodes.");
68 c.Create(4);
71 NodeContainer n3n2 = NodeContainer(c.Get(3), c.Get(2));
72
74 internet.Install(c);
75
76 // We create the channels first without any IP addressing information
77 NS_LOG_INFO("Create channels.");
79 p2p.SetDeviceAttribute("DataRate", StringValue("5Mbps"));
80 p2p.SetChannelAttribute("Delay", StringValue("2ms"));
81 NetDeviceContainer d0d2 = p2p.Install(n0n2);
82
83 NetDeviceContainer d1d2 = p2p.Install(n1n2);
84
85 p2p.SetDeviceAttribute("DataRate", StringValue("1500kbps"));
86 p2p.SetChannelAttribute("Delay", StringValue("10ms"));
87 NetDeviceContainer d3d2 = p2p.Install(n3n2);
88
89 // Later, we add IP addresses.
90 NS_LOG_INFO("Assign IP Addresses.");
92 ipv4.SetBase("10.1.1.0", "255.255.255.0");
93 Ipv4InterfaceContainer i0i2 = ipv4.Assign(d0d2);
94
95 ipv4.SetBase("10.1.2.0", "255.255.255.0");
96 Ipv4InterfaceContainer i1i2 = ipv4.Assign(d1d2);
97
98 ipv4.SetBase("10.1.3.0", "255.255.255.0");
99 Ipv4InterfaceContainer i3i2 = ipv4.Assign(d3d2);
100
101 // Create router nodes, initialize routing database and set up the routing
102 // tables in the nodes.
104
105 // Create the OnOff application to send UDP datagrams of size
106 // 210 bytes at a rate of 448 Kb/s
107 NS_LOG_INFO("Create Applications.");
108 uint16_t port = 9; // Discard port (RFC 863)
109 OnOffHelper onoff("ns3::UdpSocketFactory",
111 onoff.SetConstantRate(DataRate("448kb/s"));
112 ApplicationContainer apps = onoff.Install(c.Get(0));
113 apps.Start(Seconds(1.0));
114 apps.Stop(Seconds(10.0));
115
116 // Create a packet sink to receive these packets
117 PacketSinkHelper sink("ns3::UdpSocketFactory",
119 apps = sink.Install(c.Get(3));
120 apps.Start(Seconds(1.0));
121 apps.Stop(Seconds(10.0));
122
123 // Create a similar flow from n3 to n1, starting at time 1.1 seconds
124 onoff.SetAttribute("Remote", AddressValue(InetSocketAddress(i1i2.GetAddress(0), port)));
125 apps = onoff.Install(c.Get(3));
126 apps.Start(Seconds(1.1));
127 apps.Stop(Seconds(10.0));
128
129 // Create a packet sink to receive these packets
130 apps = sink.Install(c.Get(1));
131 apps.Start(Seconds(1.1));
132 apps.Stop(Seconds(10.0));
133
134 AsciiTraceHelper ascii;
135 p2p.EnableAsciiAll(ascii.CreateFileStream("simple-global-routing.tr"));
136 p2p.EnablePcapAll("simple-global-routing");
137
138 // Flow Monitor
139 FlowMonitorHelper flowmonHelper;
140 if (enableFlowMonitor)
141 {
142 flowmonHelper.InstallAll();
143 }
144
145 NS_LOG_INFO("Run Simulation.");
148 NS_LOG_INFO("Done.");
149
150 if (enableFlowMonitor)
151 {
152 flowmonHelper.SerializeToXmlFile("simple-global-routing.flowmon", false, false);
153 }
154
156 return 0;
157}
Ipv4InterfaceContainer i0i2
IPv4 interface container i0 + i2.
NodeContainer n1n2
Nodecontainer n1 + n2.
Ipv4InterfaceContainer i1i2
IPv4 interface container i1 + i2.
NodeContainer n0n2
Nodecontainer n0 + n2.
a polymophic address class
Definition address.h:90
holds a vector of ns3::Application pointers.
void Start(Time start) const
Start all of the Applications in this container at the start time given as a parameter.
void Stop(Time stop) const
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.
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.
Class for representing data rates.
Definition data-rate.h:78
Helper to enable IP flow monitoring on a set of Nodes.
Ptr< FlowMonitor > InstallAll()
Enable flow monitoring on all nodes.
void SerializeToXmlFile(std::string fileName, bool enableHistograms, bool enableProbes)
Same as SerializeToXmlStream, but writes to a file instead.
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.
static Ipv4Address GetAny()
static void PopulateRoutingTables()
Build a routing database and initialize the routing tables of the nodes in the simulation.
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.
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.
Build a set of PointToPointNetDevice objects.
static void Destroy()
Execute the events scheduled with ScheduleDestroy().
Definition simulator.cc:131
static void Run()
Run the simulation.
Definition simulator.cc:167
static void Stop()
Tell the Simulator the calling event should be the last one executed.
Definition simulator.cc:175
Hold variables of type string.
Definition string.h:45
Hold an unsigned integer type.
Definition uinteger.h:34
uint16_t port
Definition dsdv-manet.cc:33
void SetDefault(std::string name, const AttributeValue &value)
Definition config.cc:883
#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
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_LEVEL_INFO
LOG_INFO and above.
Definition log.h:93
Ptr< PacketSink > sink
Pointer to the packet sink application.
Definition wifi-tcp.cc:44