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|
# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2022 Maxim Devaev <[email protected]> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
# ========================================================================== #
import multiprocessing
import time
from typing import Tuple
from typing import Dict
from typing import Iterable
from typing import AsyncGenerator
from typing import Optional
from ....logging import get_logger
from ....yamlconf import Option
from ....validators.basic import valid_bool
from ....validators.basic import valid_stripped_string_not_empty
from ....validators.basic import valid_int_f1
from ....validators.basic import valid_float_f01
from .... import aiotools
from .... import aiomulti
from .... import aioproc
from .. import BaseHid
from ..otg.events import ResetEvent
from ..otg.events import make_keyboard_event
from ..otg.events import MouseButtonEvent
from ..otg.events import MouseRelativeEvent
from ..otg.events import MouseWheelEvent
from .sdp import make_sdp_record
from .bluez import BluezIface
from .server import BtServer
# =====
class Plugin(BaseHid): # pylint: disable=too-many-instance-attributes
# https://github.com/SySS-Research/bluetooth-keyboard-emulator
# https://github.com/nutki/bt-keyboard-switcher
# https://gist.github.com/whitelynx/9f9bd4cb266b3924c64dfdff14bce2e8
# https://archlinuxarm.org/forum/viewtopic.php?f=67&t=14244
def __init__( # pylint: disable=too-many-arguments,too-many-locals,super-init-not-called
self,
manufacturer: str,
product: str,
description: str,
iface: str,
alias: str,
pairing_required: bool,
auth_required: bool,
control_public: bool,
unpair_on_close: bool,
max_clients: int,
socket_timeout: float,
select_timeout: float,
) -> None:
self.__proc: Optional[multiprocessing.Process] = None
self.__stop_event = multiprocessing.Event()
self.__notifier = aiomulti.AioProcessNotifier()
self.__server = BtServer(
iface=BluezIface(
iface=iface,
alias=alias,
sdp_record=make_sdp_record(manufacturer, product, description),
pairing_required=pairing_required,
auth_required=auth_required,
),
control_public=control_public,
unpair_on_close=unpair_on_close,
max_clients=max_clients,
socket_timeout=socket_timeout,
select_timeout=select_timeout,
notifier=self.__notifier,
stop_event=self.__stop_event,
)
@classmethod
def get_plugin_options(cls) -> Dict:
return {
"manufacturer": Option("PiKVM"),
"product": Option("HID Device"),
"description": Option("Bluetooth Keyboard & Mouse"),
"iface": Option("hci0", type=valid_stripped_string_not_empty),
"alias": Option("PiKVM HID"),
"pairing_required": Option(True, type=valid_bool),
"auth_required": Option(False, type=valid_bool),
"control_public": Option(True, type=valid_bool),
"unpair_on_close": Option(True, type=valid_bool),
"max_clients": Option(1, type=valid_int_f1),
"socket_timeout": Option(5.0, type=valid_float_f01),
"select_timeout": Option(1.0, type=valid_float_f01),
}
def sysprep(self) -> None:
get_logger(0).info("Starting HID daemon ...")
self.__proc = multiprocessing.Process(target=self.__server_worker, daemon=True)
self.__proc.start()
async def get_state(self) -> Dict:
state = await self.__server.get_state()
outputs: Dict = {"available": [], "active": ""}
return {
"online": True,
"busy": False,
"connected": None,
"keyboard": {
"online": state["online"],
"leds": {
"caps": state["caps"],
"scroll": state["scroll"],
"num": state["num"],
},
"outputs": outputs,
},
"mouse": {
"online": state["online"],
"absolute": False,
"outputs": outputs,
},
}
async def poll_state(self) -> AsyncGenerator[Dict, None]:
prev_state: Dict = {}
while True:
state = await self.get_state()
if state != prev_state:
yield state
prev_state = state
await self.__notifier.wait()
async def reset(self) -> None:
self.clear_events()
self.__server.queue_event(ResetEvent())
@aiotools.atomic
async def cleanup(self) -> None:
if self.__proc is not None:
if self.__proc.is_alive():
get_logger(0).info("Stopping HID daemon ...")
self.__stop_event.set()
if self.__proc.is_alive() or self.__proc.exitcode is not None:
self.__proc.join()
# =====
def send_key_events(self, keys: Iterable[Tuple[str, bool]]) -> None:
for (key, state) in keys:
self.__server.queue_event(make_keyboard_event(key, state))
def send_mouse_button_event(self, button: str, state: bool) -> None:
self.__server.queue_event(MouseButtonEvent(button, state))
def send_mouse_relative_event(self, delta_x: int, delta_y: int) -> None:
self.__server.queue_event(MouseRelativeEvent(delta_x, delta_y))
def send_mouse_wheel_event(self, delta_x: int, delta_y: int) -> None:
self.__server.queue_event(MouseWheelEvent(delta_x, delta_y))
def clear_events(self) -> None:
self.__server.clear_events()
# =====
def __server_worker(self) -> None: # pylint: disable=too-many-branches
logger = aioproc.settle("HID", "hid")
while not self.__stop_event.is_set():
try:
self.__server.run()
except Exception:
logger.exception("Unexpected HID error")
time.sleep(5)
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