121 lines
3.5 KiB
Python
121 lines
3.5 KiB
Python
import socket
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import time
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import logging
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import random
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from owrx.config import Config
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logger = logging.getLogger(__name__)
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FEND = 0xC0
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FESC = 0xDB
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TFEND = 0xDC
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TFESC = 0xDD
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class DirewolfConfig(object):
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def getConfig(self, port, is_service):
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pm = Config.get()
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config = """
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ACHANNELS 1
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ADEVICE stdin null
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CHANNEL 0
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MYCALL {callsign}
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MODEM 1200
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KISSPORT {port}
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AGWPORT off
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""".format(
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port=port, callsign=pm["aprs_callsign"]
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)
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if is_service and pm["aprs_igate_enabled"]:
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config += """
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IGSERVER {server}
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IGLOGIN {callsign} {password}
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""".format(
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server=pm["aprs_igate_server"], callsign=pm["aprs_callsign"], password=pm["aprs_igate_password"]
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)
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if pm["aprs_igate_beacon"]:
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lat = pm["receiver_gps"]["lat"]
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lon = pm["receiver_gps"]["lon"]
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direction_ns = "N" if lat > 0 else "S"
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direction_we = "E" if lon > 0 else "W"
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lat = abs(lat)
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lon = abs(lon)
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lat = "{0:02d}^{1:05.2f}{2}".format(int(lat), (lat - int(lat)) * 60, direction_ns)
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lon = "{0:03d}^{1:05.2f}{2}".format(int(lon), (lon - int(lon)) * 60, direction_we)
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config += """
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PBEACON sendto=IG delay=0:30 every=60:00 symbol="igate" overlay=R lat={lat} long={lon} comment="OpenWebRX APRS gateway"
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""".format(
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lat=lat, lon=lon
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)
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return config
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class KissClient(object):
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@staticmethod
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def getFreePort():
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# direwolf has some strange hardcoded port ranges
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while True:
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try:
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port = random.randrange(1024, 49151)
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# test if port is available for use
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.bind(("localhost", port))
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s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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s.close()
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return port
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except OSError:
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pass
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def __init__(self, port):
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delay = .5
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retries = 0
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while True:
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try:
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self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.socket.connect(("localhost", port))
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break
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except ConnectionError:
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if retries > 20:
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logger.error("maximum number of connection attempts reached. did direwolf start up correctly?")
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raise
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retries += 1
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time.sleep(delay)
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def read(self):
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return self.socket.recv(1)
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class KissDeframer(object):
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def __init__(self):
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self.escaped = False
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self.buf = bytearray()
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def parse(self, input):
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frames = []
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for b in input:
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if b == FESC:
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self.escaped = True
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elif self.escaped:
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if b == TFEND:
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self.buf.append(FEND)
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elif b == TFESC:
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self.buf.append(FESC)
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else:
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logger.warning("invalid escape char: %s", str(input[0]))
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self.escaped = False
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elif input[0] == FEND:
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# data frames start with 0x00
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if len(self.buf) > 1 and self.buf[0] == 0x00:
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frames += [self.buf[1:]]
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self.buf = bytearray()
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else:
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self.buf.append(b)
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return frames
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