kopia lustrzana https://github.com/glidernet/ogn-python
92 wiersze
3.5 KiB
Python
92 wiersze
3.5 KiB
Python
import socket
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import logging
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from time import time
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from ogn.gateway import settings
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from ogn.aprs_parser import parse_aprs
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from ogn.aprs_utils import create_aprs_login
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from ogn.exceptions import AprsParseError, OgnParseError, AmbigousTimeError
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class ognGateway:
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def __init__(self, aprs_user, aprs_filter=''):
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self.logger = logging.getLogger(__name__)
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self.logger.info("Connect to OGN as {} with filter '{}'".format(aprs_user, (aprs_filter if aprs_filter else 'full-feed')))
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self.aprs_user = aprs_user
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self.aprs_filter = aprs_filter
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def connect(self):
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# create socket, connect to server, login and make a file object associated with the socket
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self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
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if self.aprs_filter:
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port = settings.APRS_SERVER_PORT_CLIENT_DEFINED_FILTERS
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else:
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port = settings.APRS_SERVER_PORT_FULL_FEED
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self.sock.connect((settings.APRS_SERVER_HOST, port))
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self.logger.debug('Server port {}'.format(port))
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login = create_aprs_login(self.aprs_user, -1, settings.APRS_APP_NAME, settings.APRS_APP_VER, self.aprs_filter)
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self.sock.send(login.encode())
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self.sock_file = self.sock.makefile('rw')
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def disconnect(self):
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self.logger.info('Disconnect')
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try:
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# close everything
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self.sock.shutdown(0)
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self.sock.close()
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except OSError:
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self.logger.error('Socket close error', exc_info=True)
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def run(self, callback, autoreconnect=False):
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self.process_beacon = callback
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while True:
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try:
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keepalive_time = time()
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while True:
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if time() - keepalive_time > settings.APRS_KEEPALIVE_TIME:
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self.logger.info('Send keepalive')
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self.sock.send('#keepalive'.encode())
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keepalive_time = time()
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# Read packet string from socket
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packet_str = self.sock_file.readline().strip()
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# A zero length line should not be return if keepalives are being sent
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# A zero length line will only be returned after ~30m if keepalives are not sent
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if len(packet_str) == 0:
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self.logger.warning('Read returns zero length string. Failure. Orderly closeout')
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break
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self.proceed_line(packet_str)
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except BrokenPipeError:
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self.logger.error('BrokenPipeError', exc_info=True)
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except socket.error:
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self.logger.error('socket.error', exc_info=True)
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if autoreconnect:
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self.connect()
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else:
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return
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def proceed_line(self, line):
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try:
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beacon = parse_aprs(line)
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self.logger.debug('Received beacon: {}'.format(beacon))
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except AprsParseError:
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self.logger.error('AprsParseError while parsing line: {}'.format(line), exc_info=True)
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return
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except OgnParseError:
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self.logger.error('OgnParseError while parsing line: {}'.format(line), exc_info=True)
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return
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except AmbigousTimeError as e:
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self.logger.error('Drop packet, {:.0f}s from past: {}'.format(e.timedelta.total_seconds(), line))
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return
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if beacon is not None:
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self.process_beacon(beacon)
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