Small Python script to capture UDP traffic and display the payload

udp_capture.py

import pyshark
import logging

# Set up logging
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')

def packet_handler(pkt):
    try:
        if 'UDP' in pkt:
            src_addr = pkt.ip.src
            dst_addr = pkt.ip.dst
            src_port = pkt.udp.srcport
            dest_port = pkt.udp.dstport
            payload = pkt.udp.payload

            logging.info(f"Source IP: {src_addr}, Source Port: {src_port}, "
                         f"Destination IP: {dst_addr}, Destination Port: {dest_port}, "
                         f"Payload: {payload}")
    except AttributeError as e:
        # This is normal with packets that don't have the expected layers
        pass

def main():
    # Define the interface
    interface = "eth0"
    
    # Create a live capture
    capture = pyshark.LiveCapture(interface=interface, display_filter='udp')

    logging.info(f"Starting packet capture on {interface} for all UDP ports including 6677")

    # Start the capture
    try:
        capture.apply_on_packets(packet_handler)
    except KeyboardInterrupt:
        logging.info("\nStopped packet capture.")
    except Exception as e:
        logging.error(f"Error: {e}")

if __name__ == "__main__":
    main()