ntp request

ntp.py

#!/usr/bin/env python
from socket import AF_INET, SOCK_DGRAM
import sys
import socket
import struct, time

def getNTPTime(host = "pool.ntp.org"):
    port = 123
    buf = 1024
    address = (host,port)
    msg = '\x1b' + 47 * '\0'

    # reference time (in seconds since 1900-01-01 00:00:00)
    TIME1970 = 2208988800L # 1970-01-01 00:00:00

    # connect to server
    client = socket.socket( AF_INET, SOCK_DGRAM)
    client.sendto(msg, address)
    msg, address = client.recvfrom( buf )

    t = struct.unpack( "!12I", msg )[10]
    t -= TIME1970
    return time.ctime(t).replace("  "," ")

if __name__ == "__main__":
    print getNTPTime()