def __exit__(self, type, value, tb):
"""
Handles logging and notification in the event that processing terminated
with an exception.
Also ensures that statistical information is assembled and dispatched.
"""
try:
if isinstance(value, _PacketSourceBlacklist):
self._server.addToTempBlacklist(self.mac, self._packet_type,
str(value))
return True
elif isinstance(value, Exception):
_logger.critical(
"Unable to handle %(type)s from %(mac)s:\n%(error)s" % {
'type':
self._packet_type,
'mac':
self.mac,
'error':
"\n".join(traceback.format_exception(type, value, tb)),
})
return True
finally:
if self._discarded:
_logger.debug(
"Discarded packet of type %(type)s from %(mac)s" % {
'type': self._packet_type,
'mac': self.mac,
})
time_taken = time.time() - self._start_time
_logger.debug(
"%(type)s request from %(mac)s processed in %(seconds).4f seconds"
% {
'type': self._packet_type,
'mac': self.mac,
'seconds': time_taken,
})
if self._definition:
ip = self._definition.ip
subnet = self._definition.subnet
serial = self._definition.serial
else:
subnet = serial = None
ip = self._associated_ip
statistics.emit(
statistics.Statistics(
self.source_address,
self.mac,
ip,
subnet,
serial,
self._packet_type,
time_taken,
not self._discarded,
self.port,
))
def getNextDHCPPacket(self):
"""
Listens for a DHCP packet and initiates processing upon receipt.
"""
(dhcp_received, source_address) = self._getNextDHCPPacket()
if not dhcp_received and source_address:
statistics.emit(
statistics.Statistics(source_address, None, None, None, None,
None, 0.0, False, False))
