#!/bin/env python3
import socket
from datetime import datetime

udp = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udp.bind(("0.0.0.0", 9013))

while True:
    data, (ip, port) = udp.recvfrom(1024)
    print ("Source {}:{}: {}".format(ip, port, str(data, 'utf-8')))

    now =  datetime.now().isoformat()
    udp.sendto((now + "\n").encode('utf-8'), (ip, port))