def getService(self):
f = SIPServer()
f.factory = self
return internet.UDPServer(self.port, f, interface=self.listen_addr)
def onStop(ignored):
t = internet.UDPServer(num, p)
t.startService()
return t.stopService()
self.callback(ip)
class DetectorService(internet.TimerService):
"""Detect clients not sending heartbeats for too long"""
def __init__(self):
internet.TimerService.__init__(self, CHECK_PERIOD, self.detect)
self.beats = {}
def update(self, ip):
self.beats[ip] = time.time()
def detect(self):
"""Log a list of clients with heartbeat older than CHECK_TIMEOUT"""
limit = time.time() - CHECK_TIMEOUT
silent = [ip for (ip, ipTime) in self.beats.items() if ipTime < limit]
log.msg('Silent clients: %s' % silent)
application = service.Application('Heartbeat')
# define and link the silent clients' detector service
detectorSvc = DetectorService()
detectorSvc.setServiceParent(application)
# create an instance of the Receiver protocol, and give it the callback
receiver = Receiver()
receiver.callback = detectorSvc.update
# define and link the UDP server service, passing the receiver in
udpServer = internet.UDPServer(UDP_PORT, receiver)
udpServer.setServiceParent(application)
# each service is started automatically by Twisted at launch time
log.msg('Asynchronous heartbeat server listening on port %d\n'
'press Ctrl-C to stop\n' % UDP_PORT)
def getService(self):
f = SIPServer()
f.factory = self
return internet.UDPServer(self.port, f)
def startService(self):
udpservice = internet.UDPServer(self.port, self.protocol, interface="0.0.0.0")
udpservice.startService()
log.msg("Nameserver listening on port %d" % self.port)
self.services.append(udpservice)
self.drop_privileges()