How to Implement UDP in OMNeT++

To implement the User Datagram Protocol (UDP) in OMNeT++ has needs to setup the emulation that the models a network wherever the device interact by UDP protocol. The INET framework in OMNeT++ delivers the complete support for UDP.now we are going to see how to simulate a UDP network using OMNeT++ and INET:

Step-by-Step Implementation:

Install OMNeT++ and INET Framework

Make certain we have OMNeT++ and the INET Framework installed.

Create a New OMNeT++ Project

Open OMNeT++ IDE: Start the OMNeT++ IDE.
Create a New Project: Go to File -> New -> OMNeT++ Project. Name your project (e.g., UDPSimulation).

Import INET into Your Project

Import INET: Right-click on project in the Project Explorer, choose Properties. Go to Project References and check the INET project.
Copy INET Examples: Copy sample configurations from the INET framework to project for reference.

Define the Network Topology

Generate a new NED file to describe the network topology has contains hosts by the UDP protocol.

Example: UDP Network Topology (UDPNetwork.ned)

package udp;

import inet.node.inet.StandardHost;

import inet.node.inet.Router;

network UDPNetwork

{

parameters:

@display(“bgb=600,400”);

submodules:

host1: StandardHost {

@display(“p=100,200”);

}

host2: StandardHost {

@display(“p=500,200”);

}

router: Router {

@display(“p=300,200”);

}

connections:

host1.ethg++ <–> Eth10M <–> router.ethg++;

host2.ethg++ <–> Eth10M <–> router.ethg++;

}

In this example:

Host1 and host2 are standard hosts using the UDP protocol.
Router is a router facilitating communication among the hosts.
The Eth10M channel models a 10 Mbps Ethernet link.

Configure the Simulation

Create an OMNeT++ initialization file to configure the parameters of the simulation.

Example: Configuration File (omnetpp.ini)

network = udp.UDPNetwork

sim-time-limit = 100s

# Visualization

*.visualizer.canvasVisualizer.displayBackground = true

*.visualizer.canvasVisualizer.displayGrid = true

# Host Configuration

*.host*.numUdpApps = 2

*.host1.udpApp[0].typename = “UdpBasicApp”

*.host1.udpApp[0].destAddresses = “host2”

*.host1.udpApp[0].destPort = 5000

*.host1.udpApp[0].messageLength = 1024B

*.host1.udpApp[0].sendInterval = 1s

*.host2.udpApp[0].typename = “UdpSink”

*.host2.udpApp[0].localPort = 5000

# UDP Configuration

*.host*.hasUdp = true

# IP Address Configuration

*.host1.ipv4.config = xmldoc(“host1.xml”)

*.host2.ipv4.config = xmldoc(“host2.xml”)

*.router.ipv4.config = xmldoc(“router.xml”)

Create IP Address Configuration Files

Generate XML files to describe the IP address configuration for each host and the router.

Example: IP Configuration File for host1 (host1.xml)

</interface>

<route>

</route>

</routing>

</config>

Example: IP Configuration File for host2 (host2.xml)

</interface>

<route>

</route>

</routing>

</config>

Example: IP Configuration File for router (router.xml)

</interface>

</config>

Run the Simulation

Build the Project: Right-click on your project and choose Build Project.
Run the Simulation: Click on the green play button in the OMNeT++ IDE to start the simulation.

Here, we demonstrate the complete procedures to execute the UDP that used to communicate with other devices using the UDP protocol that were implemented using the OMNeT++ simulator. Further details regarding the implementation of the User Datagram Protocol in different simulations will be provided. We present the simulation results for your project using the UDP protocol in the OMNeT++ tool for your projects.