Next we need to paste the below code to the Udp-header_eg.cc file and save the file in the ns3/scratch folder.

Code:

#include “ns3/core-module.h”

#include “ns3/udp-header.h”

#include “ns3/ipv4-address.h”

#include “ns3/packet.h”

#include <iostream>

using namespace ns3;

int main() {

    // Create a UDP Header object

    UdpHeader udpHeader;

    // Set source and destination ports

    udpHeader.SetSourcePort(12345);

    udpHeader.SetDestinationPort(80);

    std::cout << “Source Port: ” << udpHeader.GetSourcePort() << std::endl;

    std::cout << “Destination Port: ” << udpHeader.GetDestinationPort() << std::endl;

    // Create a Packet and add the UDP header to it

    Ptr<Packet> packet = Create<Packet>(100); // 100 bytes of payload

    packet->AddHeader(udpHeader);

    // Print the packet contents

    std::cout << “Packet Size: ” << packet->GetSize() << ” bytes” << std::endl;

    UdpHeader receivedHeader;

    packet->RemoveHeader(receivedHeader); // Extract the UDP header from the packet

    std::cout << “Received Source Port: ” << receivedHeader.GetSourcePort() << std::endl;

    std::cout << “Received Destination Port: ” << receivedHeader.GetDestinationPort() << std::endl;

    return 0;}