To implement the network protocol in ns3, we need to make environment to calculate the performance, strength of the network protocol, correctness across various conditions.
Below are the procedures on how to setup a testing framework for network protocol in ns3 environment.
Prerequisites
- ns-3 Installation: Ensure ns-3 is installed on your system.
- C++ Programming: Knowledge of C++ is essential.
- Understanding of ns-3: Familiarity with ns-3 modules and basic simulation scripts.
Steps to Implement Network Protocol Testing in ns-3
- Set Up the Development Environment
Make sure that you have installed in ns3. If not, then download it from official website.
- Create a New Test Module
Navigate to the src directory in ns-3 and create a new directory for your test module.
cd ns-3.XX/src
mkdir my-tests
cd my-tests
mkdir model helper test
3. Define the Protocol and Test Classes
Create header and implementation files for the protocol and test classes in the model and test directories.
my-protocol.h (Example protocol header)
#ifndef MY_PROTOCOL_H
#define MY_PROTOCOL_H
#include “ns3/application.h”
#include “ns3/address.h”
#include “ns3/ptr.h”
#include “ns3/socket.h”
namespace ns3 {
class MyProtocol : public Application {
public:
static TypeId GetTypeId (void);
MyProtocol ();
virtual ~MyProtocol ();
protected:
virtual void StartApplication (void);
virtual void StopApplication (void);
private:
void HandleRead (Ptr<Socket> socket);
void SendPacket ();
Ptr<Socket> m_socket;
Address m_peerAddress;
EventId m_sendEvent;
uint32_t m_packetSize;
Time m_interval;
};
} // namespace ns3
#endif // MY_PROTOCOL_H
my-protocol.cc (Example protocol implementation)
#include “my-protocol.h”
#include “ns3/log.h”
#include “ns3/packet.h”
#include “ns3/simulator.h”
#include “ns3/inet-socket-address.h”
namespace ns3 {
NS_LOG_COMPONENT_DEFINE (“MyProtocol”);
NS_OBJECT_ENSURE_REGISTERED (MyProtocol);
TypeId MyProtocol::GetTypeId (void) {
static TypeId tid = TypeId (“ns3::MyProtocol”)
.SetParent<Application> ()
.SetGroupName (“Applications”)
.AddConstructor<MyProtocol> ()
.AddAttribute (“PeerAddress”, “The address of the peer.”,
AddressValue (),
MakeAddressAccessor (&MyProtocol::m_peerAddress),
MakeAddressChecker ())
.AddAttribute (“PacketSize”, “The size of packets generated.”,
UintegerValue (1024),
MakeUintegerAccessor (&MyProtocol::m_packetSize),
MakeUintegerChecker<uint32_t> ())
.AddAttribute (“Interval”, “The time between packets.”,
TimeValue (Seconds (1.0)),
MakeTimeAccessor (&MyProtocol::m_interval),
MakeTimeChecker ());
return tid;
}
MyProtocol::MyProtocol ()
: m_socket (0) {
NS_LOG_FUNCTION (this);
}
MyProtocol::~MyProtocol () {
NS_LOG_FUNCTION (this);
}
void MyProtocol::StartApplication () {
NS_LOG_FUNCTION (this);
if (m_socket == 0) {
m_socket = Socket::CreateSocket (GetNode (), UdpSocketFactory::GetTypeId ());
m_socket->Connect (m_peerAddress);
m_socket->SetRecvCallback (MakeCallback (&MyProtocol::HandleRead, this));
}
m_sendEvent = Simulator::Schedule (Seconds (0.0), &MyProtocol::SendPacket, this);
}
void MyProtocol::StopApplication () {
NS_LOG_FUNCTION (this);
if (m_socket) {
m_socket->Close ();
}
Simulator::Cancel (m_sendEvent);
}
void MyProtocol::SendPacket () {
NS_LOG_FUNCTION (this);
Ptr<Packet> packet = Create<Packet> (m_packetSize);
m_socket->Send (packet);
NS_LOG_INFO (“Sent packet”);
m_sendEvent = Simulator::Schedule (m_interval, &MyProtocol::SendPacket, this);
}
void MyProtocol::HandleRead (Ptr<Socket> socket) {
NS_LOG_FUNCTION (this << socket);
Ptr<Packet> packet;
while ((packet = socket->Recv ())) {
NS_LOG_INFO (“Received packet of size ” << packet->GetSize ());
}
}
} // namespace ns3
my-protocol-test-suite.cc (Test suite implementation)
#include “ns3/test.h”
#include “ns3/core-module.h”
#include “ns3/network-module.h”
#include “ns3/internet-module.h”
#include “ns3/point-to-point-module.h”
#include “my-protocol.h”
using namespace ns3;
class MyProtocolTestCase : public TestCase {
public:
MyProtocolTestCase ();
virtual ~MyProtocolTestCase ();
private:
virtual void DoRun (void);
};
MyProtocolTestCase::MyProtocolTestCase ()
: TestCase (“MyProtocol Test Case”) {
}
MyProtocolTestCase::~MyProtocolTestCase () {
}
void MyProtocolTestCase::DoRun () {
NodeContainer nodes;
nodes.Create (2);
PointToPointHelper pointToPoint;
pointToPoint.SetDeviceAttribute (“DataRate”, StringValue (“5Mbps”));
pointToPoint.SetChannelAttribute (“Delay”, StringValue (“2ms”));
NetDeviceContainer devices;
devices = pointToPoint.Install (nodes);
InternetStackHelper stack;
stack.Install (nodes);
Ipv4AddressHelper address;
address.SetBase (“10.1.1.0”, “255.255.255.0”);
Ipv4InterfaceContainer interfaces = address.Assign (devices);
Ptr<MyProtocol> app1 = CreateObject<MyProtocol> ();
app1->SetAttribute (“PeerAddress”, AddressValue (InetSocketAddress (interfaces.GetAddress (1), 9)));
nodes.Get (0)->AddApplication (app1);
app1->SetStartTime (Seconds (1.0));
app1->SetStopTime (Seconds (10.0));
Ptr<MyProtocol> app2 = CreateObject<MyProtocol> ();
app2->SetAttribute (“PeerAddress”, AddressValue (InetSocketAddress (interfaces.GetAddress (0), 9)));
nodes.Get (1)->AddApplication (app2);
app2->SetStartTime (Seconds (1.0));
app2->SetStopTime (Seconds (10.0));
Simulator::Run ();
Simulator::Destroy ();
}
class MyProtocolTestSuite : public TestSuite {
public:
MyProtocolTestSuite ();
};
MyProtocolTestSuite::MyProtocolTestSuite ()
: TestSuite (“my-protocol”, UNIT) {
AddTestCase (new MyProtocolTestCase, TestCase::QUICK);
}
static MyProtocolTestSuite myProtocolTestSuite;
4. Integrate the Test Suite with ns-3 Build System
Update the wscript file in the src/my-tests directory to include your new test module.
src/my-tests/wscript
def build(bld):
module = bld.create_ns3_module(‘my-tests’, [‘core’, ‘network’, ‘internet’, ‘applications’])
module.source = [
‘model/my-protocol.cc’,
‘test/my-protocol-test-suite.cc’,
]
headers = bld(features=’ns3header’)
headers.module = ‘my-tests’
headers.source = [
‘model/my-protocol.h’,
]
- Build and Run the Test Suite
- Rebuild ns-3 to include your new test module.
./waf configure
./waf build
- Run your test suite.
./test.py -s my-protocol
Overall, here we can describe the network protocol that had implemented in ns3 tool and also tested the network protocol. We provide further information related to network protocol how it adjusts with diverse settings.
Get more guidance on Implementation of Network Protocol testing in ns3 from ns3simulation.com