Replay udp data using tcpreply

tcpreplay is primarily designed for replaying packets at the network level and may not be suitable for replaying UDP packets. Thus bit of work is needed to replay this data. update the input.pcap to us your desired MAC id's

tcprewrite --enet-dmac=destinationMAC --enet-smac=sourceMAC -i input.pcap -o output.pcap

Replace destinationMAC with the MAC address of the destination machine or network interface you wish to send the UDP packets to. Replace sourceMAC with the MAC address of the network interface you plan to send the packets from. Now you would be able to replay this packets

sudo tcpreplay -i input.pcap -o output.pcap

test script to read this packets ( Python3 script is provided to read data on port 9999 )

import socket

UDP_IP = "0.0.0.0"
UDP_PORT = 9999

sock = socket.socket(socket.AF_INET, # Internet
                     socket.SOCK_DGRAM) # UDP
sock.bind((UDP_IP, UDP_PORT))

while True:
    data, addr = sock.recvfrom(1024) # buffer size is 1024 bytes
    print("received message: %s" % data)