UDP socket, the solution

Sells, Fred fred at adventistcare.org
Wed Jan 4 16:27:25 EST 2006

import socket, threading, time, binascii, struct
from Configure import Debug
thanks to all, here's my final code that works, if it helps anyone

import socket, threading, time, binascii, struct
from Configure import Debug

ZERO = chr(0)

class Udp:

    def __init__(self, my_address, destination_address, timeout=2.0,
        self.MyAddress = my_address  #(ip,port)
        self.Destination = destination_address #(ip,port)
        self.Socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        self.log = log

    def sendto(self, msg):
        nsent = self.Socket.sendto(msg, self.Destination)
        if Debug.Udp: print >>Debug.Log, '\t\t\t\t   ==>', self.format(msg,
        return nsent

    def recvfrom(self, size=4096):
	data, addr = self.Socket.recvfrom(size)
        if self.log: print >>self.log, '\t\t\t\t<==   ', self.format(data,
	return data

    def format(self, x, send):
        first = struct.unpack('>BBI', x[:6])
        tmp = ' ctrl=%02x %02x n=%08x  ' % first
        if len(x)>6:
            if x[-1]==ZERO:
                tmp += '  data="%s x00"' % x[6:-1]
                tmp += '  data="%s"' % x[6:]
        return tmp

if __name__=='__main__':
    syncmsg = struct.pack('>BBI', 8, 0x4a, 0xaabbccdd)
    S = Udp( ('', 1201) , ('', 1202))
    response = S.sendto(syncmsg)
    x = S.recvfrom()
    print x

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