How to Implement IP protocols in OMNeT++

To implement the IP protocols in OMNeT++ needs to include to making and arranging module with the INET framework. It is already involving more executions of networking protocols. For Implementation of IP protocols in OMNeT++tool we provide you complete simulation and comparison analysis we will help you out.

Here, we are providing step-by-step process to implement IP protocols like IPv4 OR ipV6 in OMNeT++.

Step-by-Step Implementations:

Step 1: Set Up OMNeT++ and INET Framework

1. Install OMNeT++: Download and install the up-to-date version of OMNeT++ as of the OMNeT++
2. Install INET Framework: Download and install the INET framework from the INET repository.

Step 2: Understand IP Protocols

To explain the essentials of IP protocols (IPv4, IPv6). This protocol holds fragmentations, packet addressing, and advancing in network communication.

Step 3: Explore Existing Implementations

To executions for implementations for IPv4 and IPv6 previously involves the INET framework. We can find these in the INET source directory, classically in src/inet/networklayer/ipv4 and src/inet/networklayer/ipv6.For making or changing IP protocol module we learning these implementations is a solid substance.

Step 4: Create or Customize IP Modules

To make a new IP protocol module or customize current ones to obey the below steps.

Define the Module in .ned File

To make or modify a .ned file to describe the IP module.

simple CustomIPv4

{

parameters:

string interfaceTableModule;

string routingTableModule;

string arpModule;

gates:

input transportIn;

output transportOut;

input fromNetworkLayer;

output toNetworkLayer;

}

Implement the Module in C++

To produce or transform the corresponding .cc and .h files.

CustomIPv4.h

#ifndef __CUSTOMIPV4_H_

#define __CUSTOMIPV4_H_

#include <omnetpp.h>

#include “inet/networklayer/contract/ipv4/IPv4Address.h”

#include “inet/networklayer/contract/ipv4/IPv4ControlInfo.h”

#include “inet/networklayer/ipv4/IPv4Datagram.h”

#include “inet/networklayer/ipv4/IIPv4RoutingTable.h”

#include “inet/networklayer/common/L3AddressResolver.h”

#include “inet/networklayer/common/InterfaceTable.h”

using namespace omnetpp;

using namespace inet;

class CustomIPv4 : public cSimpleModule

{

private:

IIPv4RoutingTable *routingTable;

IInterfaceTable *interfaceTable;

cModule *arpModule;

protected:

virtual void initialize() override;

virtual void handleMessage(cMessage *msg) override;

void processPacketFromNetworkLayer(IPv4Datagram *datagram);

void processPacketFromTransportLayer(cPacket *packet);

public:

CustomIPv4();

virtual ~CustomIPv4();

};

#endif

CustomIPv4.cc

#include “CustomIPv4.h”

Define_Module(CustomIPv4);

CustomIPv4::CustomIPv4() {}

CustomIPv4::~CustomIPv4() {}

void CustomIPv4::initialize()

{

routingTable = getModuleFromPar<IIPv4RoutingTable>(par(“routingTableModule”), this);

interfaceTable = getModuleFromPar<IInterfaceTable>(par(“interfaceTableModule”), this);

arpModule = getParentModule()->getSubmodule(“arp”);

}

void CustomIPv4::handleMessage(cMessage *msg)

{

if (msg->arrivedOn(“fromNetworkLayer”))

{

IPv4Datagram *datagram = check_and_cast<IPv4Datagram *>(msg);

processPacketFromNetworkLayer(datagram);

}

else if (msg->arrivedOn(“transportIn”))

{

cPacket *packet = check_and_cast<cPacket *>(msg);

processPacketFromTransportLayer(packet);

}

else

{

// Handle other message types

}

}

void CustomIPv4::processPacketFromNetworkLayer(IPv4Datagram *datagram)

{

// Implement packet processing from the network layer

send(datagram, “transportOut”);

}

void CustomIPv4::processPacketFromTransportLayer(cPacket *packet)

{

// Implement packet processing from the transport layer

IPv4Datagram *datagram = new IPv4Datagram(packet->getName());

datagram->encapsulate(packet);

send(datagram, “toNetworkLayer”);

}

Step 5: Integrate with Simulation Model

To add the custom IP module mad about a network simulation model.

Network Configuration .ned File

network CustomNetwork

{

submodules:

host1: StandardHost {

parameters:

@display(“p=100,100”);

}

host2: StandardHost {

parameters:

@display(“p=300,100”);

}

connections:

host1.pppg++ <–> { @display(“m=100,100”); } <–> host2.pppg++;

}

omnetpp.ini Configuration

[General]

network = CustomNetwork

*.host1.ip.ipv4 = “192.168.0.1”

*.host2.ip.ipv4 = “192.168.0.2”

*.host1.ip.routingTableModule = “host1.routingTable”

*.host2.ip.routingTableModule = “host2.routingTable”

Step 6: Test and Debug

1. Run Simulations: To test the performance of the IP module below the altered network conditions to implement simulations.
2. Analyze Results: Authorise the exactness and act of the enactment.
3. Debugging: By custom OMNeT++’s debugging tools to troubleshoot any concerns.

Above the informations, we are demonstrate how to explore IP modules in OMNeT++ and to execute IP Protocols in OMNeT++.