A Discrete-Event Network Simulator
API
tap-csma.cc
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16 
17 // Network topology
18 //
19 // Packets sent to the device "thetap" on the Linux host will be sent to the
20 // tap bridge on node zero and then emitted onto the ns-3 simulated CSMA
21 // network. ARP will be used on the CSMA network to resolve MAC addresses.
22 // Packets destined for the CSMA device on node zero will be sent to the
23 // device "thetap" on the linux Host.
24 //
25 // +----------+
26 // | external |
27 // | Linux |
28 // | Host |
29 // | |
30 // | "thetap" |
31 // +----------+
32 // | n0 n1 n2 n3
33 // | +--------+ +--------+ +--------+ +--------+
34 // +-------| tap | | | | | | |
35 // | bridge | | | | | | |
36 // +--------+ +--------+ +--------+ +--------+
37 // | CSMA | | CSMA | | CSMA | | CSMA |
38 // +--------+ +--------+ +--------+ +--------+
39 // | | | |
40 // | | | |
41 // | | | |
42 // ===========================================
43 // CSMA LAN 10.1.1
44 //
45 // The CSMA device on node zero is: 10.1.1.1
46 // The CSMA device on node one is: 10.1.1.2
47 // The CSMA device on node two is: 10.1.1.3
48 // The CSMA device on node three is: 10.1.1.4
49 //
50 // Some simple things to do:
51 //
52 // 1) Ping one of the simulated nodes
53 //
54 // ./ns3 run tap-csma&
55 // ping 10.1.1.2
56 //
57 #include <iostream>
58 #include <fstream>
59 
60 #include "ns3/core-module.h"
61 #include "ns3/network-module.h"
62 #include "ns3/wifi-module.h"
63 #include "ns3/csma-module.h"
64 #include "ns3/internet-module.h"
65 #include "ns3/ipv4-global-routing-helper.h"
66 #include "ns3/tap-bridge-module.h"
67 
68 using namespace ns3;
69 
70 NS_LOG_COMPONENT_DEFINE ("TapCsmaExample");
71 
72 int
73 main (int argc, char *argv[])
74 {
75  std::string mode = "ConfigureLocal";
76  std::string tapName = "thetap";
77 
78  CommandLine cmd (__FILE__);
79  cmd.AddValue ("mode", "Mode setting of TapBridge", mode);
80  cmd.AddValue ("tapName", "Name of the OS tap device", tapName);
81  cmd.Parse (argc, argv);
82 
83  GlobalValue::Bind ("SimulatorImplementationType", StringValue ("ns3::RealtimeSimulatorImpl"));
84  GlobalValue::Bind ("ChecksumEnabled", BooleanValue (true));
85 
87  nodes.Create (4);
88 
90  csma.SetChannelAttribute ("DataRate", DataRateValue (5000000));
91  csma.SetChannelAttribute ("Delay", TimeValue (MilliSeconds (2)));
92 
94 
96  stack.Install (nodes);
97 
98  Ipv4AddressHelper addresses;
99  addresses.SetBase ("10.1.1.0", "255.255.255.0");
101 
102  TapBridgeHelper tapBridge;
103  tapBridge.SetAttribute ("Mode", StringValue (mode));
104  tapBridge.SetAttribute ("DeviceName", StringValue (tapName));
105  tapBridge.Install (nodes.Get (0), devices.Get (0));
106 
107  csma.EnablePcapAll ("tap-csma", false);
109 
110  Simulator::Stop (Seconds (60.));
111  Simulator::Run ();
113 }
AttributeValue implementation for Boolean.
Definition: boolean.h:37
Parse command-line arguments.
Definition: command-line.h:229
build a set of CsmaNetDevice objects
Definition: csma-helper.h:47
AttributeValue implementation for DataRate.
Definition: data-rate.h:298
static void Bind(std::string name, const AttributeValue &value)
Iterate over the set of GlobalValues until a matching name is found and then set its value with Globa...
aggregate IP/TCP/UDP functionality to existing Nodes.
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...
static void PopulateRoutingTables(void)
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.
holds a vector of ns3::NetDevice pointers
keep track of a set of node pointers.
static void Stop(void)
Tell the Simulator the calling event should be the last one executed.
Definition: simulator.cc:180
static void Destroy(void)
Execute the events scheduled with ScheduleDestroy().
Definition: simulator.cc:136
static void Run(void)
Run the simulation.
Definition: simulator.cc:172
Hold variables of type string.
Definition: string.h:41
build TapBridge to allow ns-3 simulations to interact with Linux tap devices and processes on the Lin...
Ptr< NetDevice > Install(Ptr< Node > node, Ptr< NetDevice > nd)
This method installs a TapBridge on the specified Node and forms the bridge with the NetDevice specif...
void SetAttribute(std::string n1, const AttributeValue &v1)
Set an attribute in the underlying TapBridge net device when these devices are automatically created.
AttributeValue implementation for Time.
Definition: nstime.h:1308
#define NS_LOG_COMPONENT_DEFINE(name)
Define a Log component with a specific name.
Definition: log.h:205
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
devices
Definition: first.py:39
stack
Definition: first.py:41
nodes
Definition: first.py:32
interfaces
Definition: first.py:48
Every class exported by the ns3 library is enclosed in the ns3 namespace.
csma
Definition: second.py:63
cmd
Definition: second.py:35