How to implement RIPv2 protocol in OMNeT++
To Implement the Routing Information Protocol version 2 (RIPv2) in OMNeT++ has various steps and the RIPv2 is the distance-vector routing protocol used in local and wide area networks. We provide you full help for implementing the RIPv2 protocol in the OMNeT++ tool, including sharing simulation findings and the best project performance outcomes.
The given below procedures demonstrate on how to implement the RIPv2 protocol using the INET framework in OMNeT++.
Step-by-Step Implementation:
Step 1: Set Up OMNeT++ and INET Framework
- Install OMNeT++: Download and install the latest version of OMNeT++ from the OMNeT++
- Install INET Framework: Download and install the INET framework from the INET repository.
Step 2: Understand RIPv2 Protocol
The RIPv2 is a distance-vector routing protocol that contain subnet masks in routing updates. Key features of RIPv2 include:
- Routing Updates: Sent periodically to neighboring routers.
- Routing Table: Contains the distance to various network destinations.
- Split Horizon: Avoids routing loops by not advertising routes back to the router from which they were learned.
- Triggered Updates: Sent immediately in response to significant changes in the network topology.
Step 3: Create the RIPv2 Protocol Module
Define the Module in .ned File
Create a .ned file for the RIPv2 protocol module.
simple RIPv2
{
parameters:
double updateInterval @unit(s) = default(30s);
double invalidTimer @unit(s) = default(180s);
double flushTimer @unit(s) = default(240s);
gates:
input fromNetworkLayer;
output toNetworkLayer;
input fromMacLayer;
output toMacLayer;
}
Implement the Module in C++
Create the corresponding .cc and .h files.
RIPv2.h
#ifndef __RIPV2_H_
#define __RIPV2_H_
#include <omnetpp.h>
#include “inet/networklayer/contract/IRoutingTable.h”
#include “inet/networklayer/common/L3AddressResolver.h”
#include “inet/networklayer/ipv4/IPv4Datagram.h”
#include <map>
using namespace omnetpp;
using namespace inet;
class RIPv2 : public cSimpleModule
{
private:
double updateInterval;
double invalidTimer;
double flushTimer;
IRoutingTable *routingTable;
cMessage *updateMsg;
std::map<L3Address, int> routingTableMap; // Map to store IP prefixes and hop counts
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
void sendRoutingUpdate();
void processRoutingUpdate(cMessage *msg);
void updateRoutingTable();
public:
RIPv2();
virtual ~RIPv2();
};
#endif
RIPv2.cc
#include “RIPv2.h”
Define_Module(RIPv2);
RIPv2::RIPv2()
{
updateMsg = nullptr;
}
RIPv2::~RIPv2()
{
cancelAndDelete(updateMsg);
}
void RIPv2::initialize()
{
updateInterval = par(“updateInterval”);
invalidTimer = par(“invalidTimer”);
flushTimer = par(“flushTimer”);
routingTable = getModuleFromPar<IRoutingTable>(par(“routingTableModule”), this);
updateMsg = new cMessage(“sendRoutingUpdate”);
scheduleAt(simTime() + updateInterval, updateMsg);
}
void RIPv2::handleMessage(cMessage *msg)
{
if (msg == updateMsg)
{
sendRoutingUpdate();
scheduleAt(simTime() + updateInterval, updateMsg);
}
else if (strcmp(msg->getName(), “RoutingUpdate”) == 0)
{
processRoutingUpdate(msg);
}
else
{
// Handle other messages
}
}
void RIPv2::sendRoutingUpdate()
{
cMessage *update = new cMessage(“RoutingUpdate”);
// Add routing information to the message
for (const auto &entry : routingTableMap)
{
update->addPar(entry.first.str().c_str()) = entry.second;
}
send(update, “toNetworkLayer”);
}
void RIPv2::processRoutingUpdate(cMessage *msg)
{
// Process received routing update
for (int i = 0; i < msg->getParList().size(); ++i)
{
const char *key = msg->getParList().get(i).getName();
int value = msg->par(key);
L3Address address(key);
routingTableMap[address] = value;
}
updateRoutingTable();
delete msg;
}
void RIPv2::updateRoutingTable()
{
// Update the routing table based on the routing information
for (const auto &entry : routingTableMap)
{
// Update routing table logic
}
}
Step 4: Integrate with Simulation Model
Integrate RIPv2 module inside a network simulation model.
Network Configuration .ned File
network RIPv2Network
{
submodules:
router1: StandardHost {
parameters:
@display(“p=100,100”);
routingTableModule = “^.routingTable”;
}
router2: StandardHost {
parameters:
@display(“p=300,100”);
routingTableModule = “^.routingTable”;
}
// Add more routers as needed
connections:
router1.pppg++ <–> { @display(“m=100,100”); } <–> router2.pppg++;
}
omnetpp.ini Configuration
network = RIPv2Network
*.router*.pppg[*].queue.typename = “DropTailQueue”
*.router*.ipv4.routingTable = “inet.networklayer.routing.manet.Router”
*.router*.networkLayer.networkProtocol.typename = “IPv4NetworkLayer”
*.router*.transportLayer.tcp.typename = “Tcp”
*.router*.transportLayer.udp.typename = “Udp”
*.router*.application[*].typename = “UdpBasicApp”
*.router*.application[*].destAddresses = “router1” // Set destination as needed
*.router*.application[*].destPort = 2000
*.router*.application[*].startTime = uniform(0s, 10s)
*.router*.application[*].sendInterval = uniform(1s, 2s)
*.router*.application[*].packetLength = 512B
*.router*.app[0].typename = “RIPv2”
Step 5: Test and Debug
- Run Simulations: Implement simulations to test the behaviour of RIPv2 module under many network conditions.
- Analyse Results: Validate the correctness and performance of implementation.
- Debugging: Use OMNeT++’s debugging tools to troubleshoot any disputes.
In the end, we explored the clear idea about how to implement and conduct the performance outcomes for RIPv2 protocol that also used in the local and wide area network. If you have any doubts regarding the procedures we will help to clarify it.