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43 lines
1.2 KiB
Python
43 lines
1.2 KiB
Python
"""Setup the internal DNS service for host applications."""
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import asyncio
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import logging
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import shlex
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_LOGGER = logging.getLogger(__name__)
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COMMAND = "socat UDP-RECVFROM:53,fork UDP-SENDTO:127.0.0.11:53"
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class DNSForward:
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"""Manage DNS forwarding to internal DNS."""
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def __init__(self, loop):
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"""Initialize DNS forwarding."""
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self.loop = loop
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self.proc = None
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async def start(self):
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"""Start DNS forwarding."""
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try:
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self.proc = await asyncio.create_subprocess_exec(
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*shlex.split(COMMAND),
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stdin=asyncio.subprocess.DEVNULL,
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stdout=asyncio.subprocess.DEVNULL,
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stderr=asyncio.subprocess.DEVNULL,
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loop=self.loop
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)
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except OSError as err:
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_LOGGER.error("Can't start DNS forwarding: %s", err)
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else:
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_LOGGER.info("Start DNS port forwarding for host add-ons")
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async def stop(self):
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"""Stop DNS forwarding."""
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if not self.proc:
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_LOGGER.warning("DNS forwarding is not running!")
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return
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self.proc.kill()
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await self.proc.wait()
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_LOGGER.info("Stop DNS forwarding")
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