mirror of
https://github.com/mofeng-git/One-KVM.git
synced 2025-12-12 01:00:29 +08:00
408 lines
16 KiB
Python
408 lines
16 KiB
Python
# ========================================================================== #
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# #
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# KVMD - The main Pi-KVM daemon. #
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# #
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# Copyright (C) 2018 Maxim Devaev <mdevaev@gmail.com> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <https://www.gnu.org/licenses/>. #
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# #
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# ========================================================================== #
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import multiprocessing
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import contextlib
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import queue
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import time
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from typing import Tuple
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from typing import List
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from typing import Dict
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from typing import Iterable
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from typing import Generator
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from typing import AsyncGenerator
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from typing import Optional
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from ....logging import get_logger
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from .... import tools
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from .... import aiotools
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from .... import aiomulti
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from .... import aioproc
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from ....yamlconf import Option
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from ....validators.basic import valid_bool
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from ....validators.basic import valid_int_f0
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from ....validators.basic import valid_int_f1
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from ....validators.basic import valid_float_f01
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from ....validators.os import valid_abs_path
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from ....validators.hw import valid_gpio_pin_optional
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from .. import BaseHid
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from .gpio import Gpio
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from .proto import REQUEST_PING
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from .proto import REQUEST_REPEAT
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from .proto import RESPONSE_LEGACY_OK
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from .proto import BaseEvent
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from .proto import SetKeyboardOutputEvent
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from .proto import SetMouseOutputEvent
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from .proto import SetConnectedEvent
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from .proto import ClearEvent
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from .proto import KeyEvent
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from .proto import MouseButtonEvent
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from .proto import MouseMoveEvent
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from .proto import MouseRelativeEvent
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from .proto import MouseWheelEvent
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from .proto import get_active_keyboard
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from .proto import get_active_mouse
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from .proto import check_response
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# =====
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class _RequestError(Exception):
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def __init__(self, msg: str) -> None:
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super().__init__(msg)
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self.msg = msg
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class _PermRequestError(_RequestError):
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pass
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class _TempRequestError(_RequestError):
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pass
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# =====
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class _HardResetEvent(BaseEvent):
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def make_request(self) -> bytes:
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raise RuntimeError("Don't call me")
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# =====
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class BasePhyConnection:
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def send(self, request: bytes) -> bytes:
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raise NotImplementedError
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class BasePhy:
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def has_device(self) -> bool:
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raise NotImplementedError
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@contextlib.contextmanager
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def connected(self) -> Generator[BasePhyConnection, None, None]:
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raise NotImplementedError
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class BaseMcuHid(BaseHid, multiprocessing.Process): # pylint: disable=too-many-instance-attributes
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def __init__( # pylint: disable=too-many-arguments,super-init-not-called
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self,
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phy: BasePhy,
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gpio_device_path: str,
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reset_pin: int,
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reset_inverted: bool,
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reset_delay: float,
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read_retries: int,
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common_retries: int,
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retries_delay: float,
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errors_threshold: int,
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noop: bool,
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) -> None:
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multiprocessing.Process.__init__(self, daemon=True)
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self.__read_retries = read_retries
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self.__common_retries = common_retries
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self.__retries_delay = retries_delay
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self.__errors_threshold = errors_threshold
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self.__noop = noop
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self.__phy = phy
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self.__gpio = Gpio(gpio_device_path, reset_pin, reset_inverted, reset_delay)
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self.__events_queue: "multiprocessing.Queue[BaseEvent]" = multiprocessing.Queue()
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self.__notifier = aiomulti.AioProcessNotifier()
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self.__state_flags = aiomulti.AioSharedFlags({
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"online": 0,
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"busy": 0,
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"status": 0,
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}, self.__notifier, type=int)
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self.__stop_event = multiprocessing.Event()
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@classmethod
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def get_plugin_options(cls) -> Dict:
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return {
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"gpio_device": Option("/dev/gpiochip0", type=valid_abs_path, unpack_as="gpio_device_path"),
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"reset_pin": Option(-1, type=valid_gpio_pin_optional),
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"reset_inverted": Option(False, type=valid_bool),
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"reset_delay": Option(0.1, type=valid_float_f01),
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"read_retries": Option(10, type=valid_int_f1),
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"common_retries": Option(100, type=valid_int_f1),
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"retries_delay": Option(0.1, type=valid_float_f01),
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"errors_threshold": Option(5, type=valid_int_f0),
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"noop": Option(False, type=valid_bool),
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}
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def sysprep(self) -> None:
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get_logger(0).info("Starting HID daemon ...")
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self.start()
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async def get_state(self) -> Dict:
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state = await self.__state_flags.get()
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online = bool(state["online"])
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pong = (state["status"] >> 16) & 0xFF
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outputs1 = (state["status"] >> 8) & 0xFF
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outputs2 = state["status"] & 0xFF
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absolute = True
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active_mouse = get_active_mouse(outputs1)
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if online and active_mouse in ["usb_rel", "ps2"]:
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absolute = False
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keyboard_outputs: Dict = {"available": [], "active": ""}
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mouse_outputs: Dict = {"available": [], "active": ""}
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if outputs1 & 0b10000000: # Dynamic
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if outputs2 & 0b00000001: # USB
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keyboard_outputs["available"].extend(["usb"])
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mouse_outputs["available"].extend(["usb", "usb_rel"])
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if outputs2 & 0b00000010: # PS/2
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keyboard_outputs["available"].extend(["ps2"])
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mouse_outputs["available"].extend(["ps2"])
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active_keyboard = get_active_keyboard(outputs1)
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if active_keyboard in keyboard_outputs["available"]:
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keyboard_outputs["active"] = active_keyboard
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if active_mouse in mouse_outputs["available"]:
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mouse_outputs["active"] = active_mouse
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return {
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"online": online,
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"busy": bool(state["busy"]),
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"connected": (bool(outputs2 & 0b01000000) if outputs2 & 0b10000000 else None),
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"keyboard": {
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"online": (online and not (pong & 0b00001000)),
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"leds": {
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"caps": bool(pong & 0b00000001),
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"scroll": bool(pong & 0b00000010),
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"num": bool(pong & 0b00000100),
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},
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"outputs": keyboard_outputs,
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},
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"mouse": {
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"online": (online and not (pong & 0b00010000)),
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"absolute": absolute,
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"outputs": mouse_outputs,
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},
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}
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async def poll_state(self) -> AsyncGenerator[Dict, None]:
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prev_state: Dict = {}
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while True:
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state = await self.get_state()
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if state != prev_state:
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yield state
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prev_state = state
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await self.__notifier.wait()
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async def reset(self) -> None:
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self.__queue_event(_HardResetEvent(), clear=True)
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@aiotools.atomic
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async def cleanup(self) -> None:
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if self.is_alive():
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get_logger(0).info("Stopping HID daemon ...")
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self.__stop_event.set()
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if self.exitcode is not None:
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self.join()
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# =====
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def send_key_events(self, keys: Iterable[Tuple[str, bool]]) -> None:
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for (key, state) in keys:
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self.__queue_event(KeyEvent(key, state))
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def send_mouse_button_event(self, button: str, state: bool) -> None:
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self.__queue_event(MouseButtonEvent(button, state))
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def send_mouse_move_event(self, to_x: int, to_y: int) -> None:
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self.__queue_event(MouseMoveEvent(to_x, to_y))
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def send_mouse_relative_event(self, delta_x: int, delta_y: int) -> None:
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self.__queue_event(MouseRelativeEvent(delta_x, delta_y))
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def send_mouse_wheel_event(self, delta_x: int, delta_y: int) -> None:
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self.__queue_event(MouseWheelEvent(delta_x, delta_y))
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def set_params(self, keyboard_output: Optional[str]=None, mouse_output: Optional[str]=None) -> None:
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events: List[BaseEvent] = []
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if keyboard_output is not None:
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events.append(SetKeyboardOutputEvent(keyboard_output))
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if mouse_output is not None:
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events.append(SetMouseOutputEvent(mouse_output))
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for (index, event) in enumerate(events, 1):
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self.__queue_event(event, clear=(index == len(events)))
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def set_connected(self, connected: bool) -> None:
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self.__queue_event(SetConnectedEvent(connected), clear=True)
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def clear_events(self) -> None:
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self.__queue_event(ClearEvent(), clear=True)
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def __queue_event(self, event: BaseEvent, clear: bool=False) -> None:
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if not self.__stop_event.is_set():
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if clear:
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# FIXME: Если очистка производится со стороны процесса хида, то возможна гонка между
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# очисткой и добавлением нового события. Неприятно, но не смертельно.
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# Починить блокировкой после перехода на асинхронные очереди.
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tools.clear_queue(self.__events_queue)
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self.__events_queue.put_nowait(event)
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def run(self) -> None: # pylint: disable=too-many-branches
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logger = aioproc.settle("HID", "hid")
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while not self.__stop_event.is_set():
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try:
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with self.__gpio:
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self.__hid_loop()
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if self.__phy.has_device():
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logger.info("Clearing HID events ...")
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try:
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with self.__phy.connected() as conn:
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self.__process_request(conn, ClearEvent().make_request())
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except Exception:
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logger.exception("Can't clear HID events")
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except Exception:
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logger.exception("Unexpected error in the GPIO loop")
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time.sleep(1)
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def __hid_loop(self) -> None:
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logger = get_logger(0)
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while not self.__stop_event.is_set():
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try:
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if not self.__phy.has_device():
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logger.error("Missing HID device")
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time.sleep(1)
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continue
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with self.__phy.connected() as conn:
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while not (self.__stop_event.is_set() and self.__events_queue.qsize() == 0):
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try:
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event = self.__events_queue.get(timeout=0.1)
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except queue.Empty:
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self.__process_request(conn, REQUEST_PING)
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else:
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if isinstance(event, _HardResetEvent):
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self.__set_state_busy(True)
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self.__gpio.reset()
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else:
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if isinstance(event, (SetKeyboardOutputEvent, SetMouseOutputEvent)):
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self.__set_state_busy(True)
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if not self.__process_request(conn, event.make_request()):
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self.clear_events()
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except Exception:
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self.clear_events()
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logger.exception("Unexpected error in the HID loop")
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time.sleep(1)
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def __process_request(self, conn: BasePhyConnection, request: bytes) -> bool: # pylint: disable=too-many-branches
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logger = get_logger()
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error_messages: List[str] = []
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live_log_errors = False
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common_retries = self.__common_retries
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read_retries = self.__read_retries
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error_retval = False
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while common_retries and read_retries:
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response = (RESPONSE_LEGACY_OK if self.__noop else conn.send(request))
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try:
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if len(response) < 4:
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read_retries -= 1
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raise _TempRequestError(f"No response from HID: request={request!r}")
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if not check_response(response):
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request = REQUEST_REPEAT
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raise _TempRequestError("Invalid response CRC; requesting response again ...")
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code = response[1]
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if code == 0x48: # Request timeout # pylint: disable=no-else-raise
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raise _TempRequestError(f"Got request timeout from HID: request={request!r}")
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elif code == 0x40: # CRC Error
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raise _TempRequestError(f"Got CRC error of request from HID: request={request!r}")
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elif code == 0x45: # Unknown command
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raise _PermRequestError(f"HID did not recognize the request={request!r}")
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elif code == 0x24: # Rebooted?
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raise _PermRequestError("No previous command state inside HID, seems it was rebooted")
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elif code == 0x20: # Legacy done
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self.__set_state_online(True)
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return True
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elif code & 0x80: # Pong/Done with state
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self.__set_state_pong(response)
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return True
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raise _TempRequestError(f"Invalid response from HID: request={request!r}, response=0x{response!r}")
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except _RequestError as err:
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common_retries -= 1
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if live_log_errors:
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logger.error(err.msg)
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else:
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error_messages.append(err.msg)
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if len(error_messages) > self.__errors_threshold:
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for msg in error_messages:
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logger.error(msg)
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error_messages = []
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live_log_errors = True
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if isinstance(err, _PermRequestError):
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error_retval = True
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break
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self.__set_state_online(False)
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if common_retries and read_retries:
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time.sleep(self.__retries_delay)
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for msg in error_messages:
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logger.error(msg)
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if not (common_retries and read_retries):
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logger.error("Can't process HID request due many errors: %r", request)
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return error_retval
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def __set_state_online(self, online: bool) -> None:
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self.__state_flags.update(online=int(online))
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def __set_state_busy(self, busy: bool) -> None:
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self.__state_flags.update(busy=int(busy))
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def __set_state_pong(self, response: bytes) -> None:
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status = response[1] << 16
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if len(response) > 4:
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status |= (response[2] << 8) | response[3]
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reset_required = (1 if response[1] & 0b01000000 else 0)
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self.__state_flags.update(online=1, busy=reset_required, status=status)
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if reset_required:
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self.__gpio.reset()
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