#!/usr/bin/python
# listen for UDP packets on given port
# usefull for debugging
import sys, socket

def rec(port):
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.bind(('', port))
    while 1:
        data, addr = s.recvfrom(1024)
        print `data`

rec(int(sys.argv[1]))