Set fastrouter mapping (not tested)

mapping.py

import socket
import struct

ip = '127.0.0.1'
port = 5005

payload = {
    'key': '',
    'address': '',
}

msg = ''

for k, v in payload.iteritems():
    msg += struct.pack('<h', len(k)) + k
    msg += struct.pack('<h', len(v)) + v

msg = struct.pack('<BhB', 224, len(msg), 0) + msg

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.sendto(msg, (ip, port))