How to Implement classful protocol in OMNeT++
To implement the classful routing protocol in OMNeT++ needs a numerous step like build the environment, understanding the classful routing concepts, creating the protocol module, assimilating it with the INET framework, and testing it.
Here’s a detailed guide to help you through this process, we are using the classful Routing Information Protocol (RIP) as an example.
Step-by-Step Implementation:
Step 1: Set Up OMNeT++ and INET Framework
- Install OMNeT++: Make certain that you have OMNeT++ installed on your computer.
- Install INET Framework: Install the INET framework from the INET repository.
Step 2: Understand Classful Routing Protocols
Classful routing protocols do not send subnet mask information in their routing updates. They contain protocols like RIP version 1 and IGRP. To determine the network portion of an IP address, the protocols has to rely on the address classes (A, B, C).
Step 3: Explore Existing Implementations
INET framework has different routing protocol executions. We can build the classful routing protocol by reviewing the implementation that offers some valuable insights.
Step 4: Create the Classful Routing Protocol Module
Define the Module in .ned File
Create a .ned file for the classful routing protocol module.
simple ClassfulRouting
{
parameters:
double updateInterval @unit(s) = default(30s);
gates:
input in[];
output out[];
}
Implement the Module in C++
Create the corresponding .cc and .h files.
ClassfulRouting.h
#ifndef __CLASSFULROUTING_H_
#define __CLASSFULROUTING_H_
#include <omnetpp.h>
#include “inet/networklayer/contract/IRoutingTable.h”
#include “inet/networklayer/common/L3AddressResolver.h”
#include “inet/networklayer/ipv4/IPv4Datagram.h”
using namespace omnetpp;
using namespace inet;
class ClassfulRouting : public cSimpleModule
{
private:
double updateInterval;
IRoutingTable *routingTable;
cMessage *updateMsg;
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
void sendRoutingUpdate();
void processRoutingUpdate(cMessage *msg);
public:
ClassfulRouting();
virtual ~ClassfulRouting();
};
#endif
ClassfulRouting.cc
#include “ClassfulRouting.h”
Define_Module(ClassfulRouting);
ClassfulRouting::ClassfulRouting()
{
updateMsg = nullptr;
}
ClassfulRouting::~ClassfulRouting()
{
cancelAndDelete(updateMsg);
}
void ClassfulRouting::initialize()
{
updateInterval = par(“updateInterval”);
routingTable = getModuleFromPar<IRoutingTable>(par(“routingTableModule”), this);
updateMsg = new cMessage(“sendUpdate”);
scheduleAt(simTime() + updateInterval, updateMsg);
}
void ClassfulRouting::handleMessage(cMessage *msg)
{
if (msg == updateMsg)
{
sendRoutingUpdate();
scheduleAt(simTime() + updateInterval, updateMsg);
}
else
{
processRoutingUpdate(msg);
}
}
void ClassfulRouting::sendRoutingUpdate()
{
// Implement the logic to send routing table updates to neighbors
}
void ClassfulRouting::processRoutingUpdate(cMessage *msg)
{
// Implement the logic to process received routing table updates
delete msg;
}
Step 5: Integrate with Simulation Model
Integrate your classful routing protocol module into a network simulation model.
Network Configuration .ned File
network ClassfulNetwork
{
submodules:
host1: StandardHost {
parameters:
@display(“p=100,100”);
routingTableModule = “^.routingTable”;
}
host2: StandardHost {
parameters:
@display(“p=300,100”);
routingTableModule = “^.routingTable”;
}
connections:
host1.pppg++ <–> { @display(“m=100,100”); } <–> host2.pppg++;
}
omnetpp.ini Configuration
network = ClassfulNetwork
*.host1.ipv4Routing = “inet.networklayer.ipv4.IPv4Routing”
*.host2.ipv4Routing = “inet.networklayer.ipv4.IPv4Routing”
*.host1.routingTableModule = “host1.routingTable”
*.host2.routingTableModule = “host2.routingTable”
*.host1.classfulRouting = “ClassfulRouting”
*.host2.classfulRouting = “ClassfulRouting”
Step 6: Test and Debug
- Run Simulations: To examine the actions of classful routing protocol module in different network conditions, we have to execute the simulations.
- Analyze Results: Verify the correctness and performance of the implementation.
- Debugging: Troubleshoot any issues with the help of OMNeT++’s debugging tools.
Finally, we hope that this demonstration will guide you through the implementation steps of classful protocol and INET framework used in the OMNeT++. It offers the set up with samples helps us to easily understand the process.
We help you with your project on routing ideas, building the protocol module, connecting it with the INET framework, and testing it out. You can get the best simulation results with our support.