import socket
import sys

def main():
    HOST = '::'
    PORT = 32323
    res = socket.getaddrinfo(HOST, PORT, socket.AF_INET6, socket.SOCK_DGRAM, 0,
    af, socktype, proto, canonname, sa = res[0]
    try:
        s = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
        s.bind(sa)
        while True:
            data, addr = s.recvfrom(1024)
            if not data:
                break
            print 'server received %r from %r' % (data, addr)
            s.sendto(data, addr)
        s.close()
    except socket.error, msg:
        print msg