How to Implement address protocol in OMNeT++
To implement an address protocol in OMNeT++, we have to build a module that support address resolution and management for network nodes. That module must have features like assigning IP addresses, managing address mappings, and resolving addresses for communication. Here’s a step-by-step guide to help you implement a basic address protocol in OMNeT++ using the INET framework.
Step-by-Step Implementation:
Step 1: Set Up OMNeT++ and INET Framework
- Install OMNeT++: Install the latest version of OMNeT++ on your computer.
- Install INET Framework: Install the INET framework from the INET repository.
Step 2: Define the Address Protocol
In this sample, we’ll create a simple address protocol module that allocates and resolves IP addresses.
Define the Module in .ned File
Create a .ned file for the address protocol module.
simple AddressProtocol
{
parameters:
@display(“i=block/network”);
gates:
input fromNetworkLayer;
output toNetworkLayer;
input fromLowerLayer;
output toLowerLayer;
}
Implement the Module in C++
Build the corresponding .cc and .h files.
AddressProtocol.h
#ifndef __ADDRESSPROTOCOL_H_
#define __ADDRESSPROTOCOL_H_
#include <omnetpp.h>
#include “inet/networklayer/contract/IRoutingTable.h”
#include “inet/networklayer/common/L3AddressResolver.h”
#include <map>
using namespace omnetpp;
using namespace inet;
class AddressProtocol : public cSimpleModule
{
private:
std::map<MacAddress, L3Address> addressTable; // Maps MAC addresses to IP addresses
protected:
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
void assignAddress(const MacAddress &macAddr);
L3Address resolveAddress(const MacAddress &macAddr);
public:
AddressProtocol();
virtual ~AddressProtocol();
};
#endif
AddressProtocol.cc
#include “AddressProtocol.h”
Define_Module(AddressProtocol);
AddressProtocol::AddressProtocol()
{
}
AddressProtocol::~AddressProtocol()
{
}
void AddressProtocol::initialize()
{
// Initialization code here
}
void AddressProtocol::handleMessage(cMessage *msg)
{
if (msg->isSelfMessage())
{
// Handle self messages if any
}
else if (strcmp(msg->getArrivalGate()->getName(), “fromLowerLayer”) == 0)
{
// Handle messages from lower layer (e.g., MAC layer)
MacAddress srcMac = MacAddressResolver().resolve(msg->getSenderModule()->getFullPath().c_str());
L3Address ipAddr = resolveAddress(srcMac);
if (ipAddr.isUnspecified())
{
assignAddress(srcMac);
ipAddr = resolveAddress(srcMac);
}
// Process the packet with resolved IP address
}
else if (strcmp(msg->getArrivalGate()->getName(), “fromNetworkLayer”) == 0)
{
// Handle messages from network layer (e.g., IP layer)
}
delete msg;
}
void AddressProtocol::assignAddress(const MacAddress &macAddr)
{
// Assign an IP address to the given MAC address
L3Address ipAddr = L3Address(“192.168.1.” + std::to_string(addressTable.size() + 1));
addressTable[macAddr] = ipAddr;
}
L3Address AddressProtocol::resolveAddress(const MacAddress &macAddr)
{
// Resolve and return the IP address for the given MAC address
if (addressTable.find(macAddr) != addressTable.end())
{
return addressTable[macAddr];
}
return L3Address();
}
Step 3: Integrate with Simulation Model
Integrate the AddressProtocol module within network simulation model.
Network Configuration .ned File
network AddressNetwork
{
submodules:
node1: StandardHost {
parameters:
@display(“p=100,100”);
}
node2: StandardHost {
parameters:
@display(“p=300,100”);
}
// Add more nodes as needed
connections:
node1.pppg++ <–> { @display(“m=100,100”); } <–> node2.pppg++;
}
omnetpp.ini Configuration
network = AddressNetwork
*.node*.pppg[*].queue.typename = “DropTailQueue”
*.node*.ipv4.routingTable = “inet.networklayer.routing.manet.Router”
*.node*.networkLayer.networkProtocol.typename = “IPv4NetworkLayer”
*.node*.transportLayer.tcp.typename = “Tcp”
*.node*.transportLayer.udp.typename = “Udp”
*.node*.application[*].typename = “UdpBasicApp”
*.node*.application[*].destAddresses = “node1” // Set destination as needed
*.node*.application[*].destPort = 2000
*.node*.application[*].startTime = uniform(0s, 10s)
*.node*.application[*].sendInterval = uniform(1s, 2s)
*.node*.application[*].packetLength = 512B
*.node*.app[0].typename = “AddressProtocol”
Step 4: Test and Debug
- Run Simulations: Execute simulations to examine the characterisitics of AddressProtocol module through multiple network conditions.
- Analyze Results: Verify the correctness and performance of execution.
- Debugging: Use OMNeT++’s debugging tools to troubleshoot any issues.
Here, we comprehensively walk you through the detailed approach of how to implement the address protocol using the INET framework in the OMNeT++ environment. Whenever, you need some clarity about this script reach out to us.
omnet-manual.com will give you best simulation resust for all your address protocol framework in the OMNeT++ tool.