122 lines
4.4 KiB
Python
122 lines
4.4 KiB
Python
#!/usr/bin/env python
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import ctypes
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import glob
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import os
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import sys
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import time
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import zmq
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import zmq.auth
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from aman.com import AircraftReport_pb2
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from aman.config.Server import Server
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from threading import Thread, _active
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class ReceiverThread(Thread):
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def __init__(self, socket, aman):
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Thread.__init__(self)
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self.socket = socket
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self.aman = aman
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def run(self):
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while True:
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try:
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msg = self.socket.recv(zmq.NOBLOCK)
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# parse the received message
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report = AircraftReport_pb2.AircraftReport()
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report.ParseFromString(msg)
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# try to associate the received aircraft to an airport
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self.aman.updateAircraftReport(report)
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except zmq.ZMQError as error:
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if zmq.EAGAIN == error.errno:
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time.sleep(0.5)
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continue
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else:
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return
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def threadId(self):
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if hasattr(self, '_thread_id'):
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return self._thread_id
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for id, thread in _active.items():
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if thread is self:
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return id
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def stopThread(self):
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id = self.threadId()
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res = ctypes.pythonapi.PyThreadState_SetAsyncExc(id, ctypes.py_object(SystemExit))
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if 1 < res:
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ctypes.pythonapi.PyThreadState_SetAsyncExc(id, 0)
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# @brief Receives and sends messages to EuroScope plugins
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class Euroscope:
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def __init__(self):
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self.context = None
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self.receiverSocket = None
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self.receiverThread = None
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self.notificationSocket = None
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def __del__(self):
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self.release()
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# @brief Initializes the ZMQ socket
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# @param[in] config The server configuration
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def acquire(self, configPath : str, config : Server, aman):
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self.context = zmq.Context()
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# find the key directories
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serverKeyPath = os.path.join(os.path.join(configPath, 'keys'), 'server')
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if False == os.path.isdir(serverKeyPath):
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sys.stderr.write('No directory for the server key found')
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sys.exit(-1)
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print('Path to the server key: ' + serverKeyPath)
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clientKeyPath = os.path.join(os.path.join(configPath, 'keys'), 'clients')
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if False == os.path.isdir(clientKeyPath):
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sys.stderr.write('No directory for the client keys found')
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sys.exit(-1)
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print('Path to the client keys: ' + clientKeyPath)
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# read the certificates
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keyPairPath = glob.glob(os.path.join(serverKeyPath, '*.key_secret'))
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if 1 != len(keyPairPath):
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sys.stderr.write('No public-private keypair found for the server certificate')
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sys.exit(-1)
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keyPair = zmq.auth.load_certificate(keyPairPath[0])
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# initialize the receiver
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self.receiverSocket = zmq.Socket(self.context, zmq.SUB)
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self.receiverSocket.setsockopt(zmq.CURVE_PUBLICKEY, keyPair[0])
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self.receiverSocket.setsockopt(zmq.CURVE_SECRETKEY, keyPair[1])
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self.receiverSocket.setsockopt(zmq.CURVE_SERVER, True)
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self.receiverSocket.bind('tcp://' + config.Address + ':' + str(config.PortReceiver))
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self.receiverSocket.setsockopt(zmq.SUBSCRIBE, b'')
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self.receiverThread = ReceiverThread(self.receiverSocket, aman)
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self.receiverThread.start()
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print('Listening to tcp://' + config.Address + ':' + str(config.PortReceiver))
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# initialize the notification
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self.notificationSocket = zmq.Socket(self.context, zmq.PUB)
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self.notificationSocket.setsockopt(zmq.CURVE_PUBLICKEY, keyPair[0])
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self.notificationSocket.setsockopt(zmq.CURVE_SECRETKEY, keyPair[1])
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self.notificationSocket.setsockopt(zmq.CURVE_SERVER, True)
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self.notificationSocket.bind('tcp://' + config.Address + ':' + str(config.PortNotification))
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print('Publishing to tcp://' + config.Address + ':' + str(config.PortNotification))
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def release(self):
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if None != self.receiverThread:
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self.receiverThread.stopThread()
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self.receiverThread.join()
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self.receiverThread = None
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if None != self.receiverSocket:
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self.receiverSocket.close()
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self.receiverSocket = None
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if None != self.notificationSocket:
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self.notificationSocket.close()
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self.notificationSocket = None
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