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How to implement IPv4 protocols in ns3

To implement an IPv4 protocol in ns3 that contains to generate the unique routing protocol classes, that incorporated them with the existing ns3 ipv4 stack that make sure it can communicate correctly with other networks components. Here is the complete detailed about how to implement the IPV4 protocol like ODMRP in ns3.

Prerequisites

  1. Ns3 Installation: Make certain ns-3 is installed in the computer.
  2. C++ Programming: familiarity of C++ is required.
  3. Understanding of ns-3: Basic understanding with ns-3 modules, particularly the IPv4 stack.

Steps to Implement an IPv4 Protocol

  1. Set Up the Development Environment

Make sure that you have installed ns3. Download it from official ns3 website.

  1. Create a New Protocol Module

Navigate to the src directory in ns-3 and create a new directory for your protocol.

cd ns-3.XX/src

mkdir odmrp

cd odmrp

mkdir model helper test

3.      Define the Protocol Classes and Headers

Create header and implementation files for your protocol in the model directory.

odmrp.h

#ifndef ODMRP_H

#define ODMRP_H

#include “ns3/ipv4-routing-protocol.h”

#include “ns3/ipv4-address.h”

#include “ns3/timer.h”

#include “ns3/node.h”

#include “ns3/socket.h”

#include “ns3/net-device.h”

#include “ns3/packet.h”

#include “ns3/nstime.h”

namespace ns3 {

class Odrmp : public Ipv4RoutingProtocol {

public:

static TypeId GetTypeId (void);

Odrmp ();

virtual ~Odrmp ();

virtual void DoDispose (void);

// Implement required virtual functions from Ipv4RoutingProtocol

virtual Ptr<Ipv4Route> RouteOutput (Ptr<Packet> p, const Ipv4Header &header,

Ptr<NetDevice> oif,

Socket::SocketErrno &sockerr);

virtual bool RouteInput (Ptr<const Packet> p, const Ipv4Header &header,

Ptr<const NetDevice> idev,

UnicastForwardCallback ucb,

MulticastForwardCallback mcb,

LocalDeliverCallback lcb,

ErrorCallback ecb);

virtual void NotifyInterfaceUp (uint32_t interface);

virtual void NotifyInterfaceDown (uint32_t interface);

virtual void NotifyAddAddress (uint32_t interface, Ipv4InterfaceAddress address);

virtual void NotifyRemoveAddress (uint32_t interface, Ipv4InterfaceAddress address);

virtual void SetIpv4 (Ptr<Ipv4> ipv4);

private:

// Define internal states and methods here

Ptr<Ipv4> m_ipv4;

};

} // namespace ns3

#endif // ODMRP_H

odmrp.cc

#include “odmrp.h”

#include “ns3/log.h”

#include “ns3/simulator.h”

#include “ns3/ipv4-header.h”

#include “ns3/ipv4-route.h”

#include “ns3/inet-socket-address.h”

#include “ns3/inet6-socket-address.h”

#include “ns3/udp-socket-factory.h”

#include “ns3/uinteger.h”

namespace ns3 {

NS_LOG_COMPONENT_DEFINE (“Odrmp”);

NS_OBJECT_ENSURE_REGISTERED (Odrmp)

TypeId Odrmp::GetTypeId (void) {

static TypeId tid = TypeId (“ns3::Odrmp”)

.SetParent<Ipv4RoutingProtocol> ()

.SetGroupName (“Internet”)

.AddConstructor<Odrmp> ();

return tid;

}

Odrmp::Odrmp () {

NS_LOG_FUNCTION (this);

}

Odrmp::~Odrmp () {

NS_LOG_FUNCTION (this);

}

void Odrmp::DoDispose () {

NS_LOG_FUNCTION (this);

Ipv4RoutingProtocol::DoDispose ();

}

Ptr<Ipv4Route> Odrmp::RouteOutput (Ptr<Packet> p, const Ipv4Header &header,

Ptr<NetDevice> oif, Socket::SocketErrno &sockerr) {

NS_LOG_FUNCTION (this << p << header << oif);

// Implement route output logic here

return Ptr<Ipv4Route> ();

}

bool Odrmp::RouteInput (Ptr<const Packet> p, const Ipv4Header &header,

Ptr<const NetDevice> idev, UnicastForwardCallback ucb,

MulticastForwardCallback mcb, LocalDeliverCallback lcb,

ErrorCallback ecb) {

NS_LOG_FUNCTION (this << p << header << idev);

// Implement route input logic here

return false;

}

void Odrmp::NotifyInterfaceUp (uint32_t interface) {

NS_LOG_FUNCTION (this << interface);

}

void Odrmp::NotifyInterfaceDown (uint32_t interface) {

NS_LOG_FUNCTION (this << interface);

}

void Odrmp::NotifyAddAddress (uint32_t interface, Ipv4InterfaceAddress address) {

NS_LOG_FUNCTION (this << interface << address);

}

void Odrmp::NotifyRemoveAddress (uint32_t interface, Ipv4InterfaceAddress address) {

NS_LOG_FUNCTION (this << interface << address);

}

void Odrmp::SetIpv4 (Ptr<Ipv4> ipv4) {

NS_LOG_FUNCTION (this << ipv4);

m_ipv4 = ipv4;

}

} // namespace ns3

4.      Integrate with ns-3 Build System

Update the wscript file in the src directory to include your new protocol.

src/odmrp/wscript

def build(bld):

module = bld.create_ns3_module(‘odmrp’, [‘core’, ‘network’, ‘internet’])

module.source = [

‘model/odmrp.cc’,

]

headers = bld(features=’ns3header’)

headers.module = ‘odmrp’

headers.source = [

‘model/odmrp.h’,

]

5.      Create Helper and Test Classes

Create helper and test classes to facilitate the usage and testing of your protocol.

odmrp-helper.h

#ifndef ODMRP_HELPER_H

#define ODMRP_HELPER_H

#include “ns3/odmrp.h”

#include “ns3/node-container.h”

#include “ns3/ipv4-routing-helper.h”

namespace ns3 {

class OdrmpHelper : public Ipv4RoutingHelper {

public:

OdrmpHelper ();

OdrmpHelper* Copy (void) const;

virtual Ptr<Ipv4RoutingProtocol> Create (Ptr<Node> node) const;

private:

};

} // namespace ns3

#endif // ODMRP_HELPER_H

odmrp-helper.cc

#include “odmrp-helper.h”

#include “ns3/odmrp.h”

#include “ns3/ipv4-routing-protocol.h”

#include “ns3/ipv4-list-routing.h”

#include “ns3/log.h”

namespace ns3 {

NS_LOG_COMPONENT_DEFINE (“OdrmpHelper”);

OdrmpHelper::OdrmpHelper () {

}

OdrmpHelper* OdrmpHelper::Copy (void) const {

return new OdrmpHelper (*this);

}

Ptr<Ipv4RoutingProtocol> OdrmpHelper::Create (Ptr<Node> node) const {

Ptr<Odrmp> agent = CreateObject<Odrmp> ();

node->AggregateObject (agent);

return agent;

}

} // namespace ns3

  1. Build and Test
  • Rebuild ns-3 to include your new protocol.

./waf configure

./waf build

  • Create test scripts to verify the implementation of your protocol.

scratch/test-odmrp.cc

#include “ns3/core-module.h”

#include “ns3/network-module.h”

#include “ns3/internet-module.h”

#include “ns3/odmrp-helper.h”

#include “ns3/ipv4-static-routing-helper.h”

#include “ns3/ipv4-list-routing-helper.h”

using namespace ns3;

int main (int argc, char *argv[]) {

CommandLine cmd;

cmd.Parse (argc, argv);

NodeContainer nodes;

nodes.Create (2);

InternetStackHelper internet;

OdrmpHelper odmrp;

Ipv4ListRoutingHelper list;

list.Add (odmrp, 10);

internet.SetRoutingHelper (list);

internet.Install (nodes);

// Add additional setup code here

Simulator::Run ();

Simulator::Destroy ();

return 0;

}

7.      Run and Debug

Run your test script and debug any issues that arise.

./waf –run scratch/test-odmrp

Overall, we had implemented and analyse the performance for the IPv4 protocols in ns3 environment and also we provide the further information about IPv4 protocol.

IPV4 protocol like ODMRP in ns3 tool are worked by us, get system development done in an effective way by our experts.