109 lines
4.3 KiB
Python
109 lines
4.3 KiB
Python
# Zeroconf registration implementation for Moonraker
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#
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# Copyright (C) 2021 Clifford Roche <clifford.roche@gmail.com>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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from __future__ import annotations
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import socket
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import asyncio
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import logging
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import ipaddress
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from zeroconf import IPVersion
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from zeroconf.asyncio import AsyncServiceInfo, AsyncZeroconf
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from typing import TYPE_CHECKING, Any, Dict, Iterator, List, Optional
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if TYPE_CHECKING:
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from confighelper import ConfigHelper
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from .machine import Machine
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class AsyncRunner:
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def __init__(self, ip_version: IPVersion) -> None:
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self.ip_version = ip_version
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self.aiozc: Optional[AsyncZeroconf] = None
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async def register_services(self, infos: List[AsyncServiceInfo]) -> None:
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self.aiozc = AsyncZeroconf(ip_version=self.ip_version)
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tasks = [
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self.aiozc.async_register_service(info, allow_name_change=True)
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for info in infos
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]
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background_tasks = await asyncio.gather(*tasks)
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await asyncio.gather(*background_tasks)
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async def unregister_services(self, infos: List[AsyncServiceInfo]) -> None:
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assert self.aiozc is not None
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tasks = [self.aiozc.async_unregister_service(info) for info in infos]
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background_tasks = await asyncio.gather(*tasks)
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await asyncio.gather(*background_tasks)
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await self.aiozc.async_close()
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async def update_services(self, infos: List[AsyncServiceInfo]) -> None:
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assert self.aiozc is not None
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tasks = [self.aiozc.async_update_service(info) for info in infos]
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background_tasks = await asyncio.gather(*tasks)
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await asyncio.gather(*background_tasks)
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class ZeroconfRegistrar:
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def __init__(self, config: ConfigHelper) -> None:
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self.server = config.get_server()
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self.runner = AsyncRunner(IPVersion.All)
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hi = self.server.get_host_info()
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addr: str = hi["address"]
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if addr.lower() == "all":
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addr = "::"
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host_ip = ipaddress.ip_address(addr)
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fam = socket.AF_INET6 if host_ip.version == 6 else socket.AF_INET
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addresses: List[bytes] = [(socket.inet_pton(fam, addr))]
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self.bound_all = addr in ["0.0.0.0", "::"]
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self.service_info = self._build_service_info(addresses)
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if self.bound_all:
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self.server.register_event_handler(
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"machine:net_state_changed", self._update_service)
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async def component_init(self) -> None:
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logging.info("Starting Zeroconf services")
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if self.bound_all:
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machine: Machine = self.server.lookup_component("machine")
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network = machine.get_system_info()["network"]
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addresses = [x for x in self._extract_ip_addresses(network)]
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self.service_info = self._build_service_info(addresses)
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await self.runner.register_services([self.service_info])
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async def close(self) -> None:
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await self.runner.unregister_services([self.service_info])
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async def _update_service(self, network: Dict[str, Any]) -> None:
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if self.bound_all:
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addresses = [x for x in self._extract_ip_addresses(network)]
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self.service_info = self._build_service_info(addresses)
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await self.runner.update_services([self.service_info])
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def _build_service_info(self,
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addresses: Optional[List[bytes]] = None
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) -> AsyncServiceInfo:
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hi = self.server.get_host_info()
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return AsyncServiceInfo(
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"_moonraker._tcp.local.",
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f"Moonraker Instance on {hi['hostname']}._moonraker._tcp.local.",
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addresses=addresses,
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port=hi["port"],
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properties={"path": "/"},
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server=f"{hi['hostname']}.local.",
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)
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def _extract_ip_addresses(self, network: Dict[str, Any]) -> Iterator[bytes]:
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for ifname, ifinfo in network.items():
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for addr_info in ifinfo["ip_addresses"]:
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if addr_info["is_link_local"]:
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continue
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is_ipv6 = addr_info['family'] == "ipv6"
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family = socket.AF_INET6 if is_ipv6 else socket.AF_INET
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yield socket.inet_pton(family, addr_info["address"])
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def load_component(config: ConfigHelper) -> ZeroconfRegistrar:
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return ZeroconfRegistrar(config)
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