def __init__(self, channeltype, band):
''' Get encoder and pass it to NetworkManager '''
self._channeltype = channeltype
self._band = band
encoder = MessageEncoderFactory.create(channeltype, band)
self._encoder = encoder
if not encoder:
raise Error('Such encoder does not exist')
self._netmanager = NetworkManager(encoder)
self._buffer = ('', None)
def bind(self, addr):
'''
Binds socket to given host and port. Fails if same port is already bou-
nd or if privileges are insufficient. NFQueue loop is run in child pro-
cces. addr is a tuple (host, port). Localhost is denoted by empty
string (' ').
'''
if len(addr) < 2:
raise Error('Invalid argument')
try:
if self._encoder.initpackets():
self._encoder = MessageEncoderFactory.create(self._channeltype,
self._band )
self._netmanager.bind(addr)
except gaierror, e:
raise Error('Given hostname or addres is not valid: ' + str(e))