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# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2021 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 dataclasses
import struct
from ....keyboard.mappings import KEYMAP
from ....mouse import MouseRange
from .... import tools
# =====
class BaseEvent:
def make_request(self) -> bytes:
raise NotImplementedError
# =====
_KEYBOARD_NAMES_TO_CODES = {
"disabled": 0b00000000,
"usb": 0b00000001,
"ps2": 0b00000011,
}
_KEYBOARD_CODES_TO_NAMES = tools.swapped_kvs(_KEYBOARD_NAMES_TO_CODES)
def get_active_keyboard(outputs: int) -> str:
return _KEYBOARD_CODES_TO_NAMES.get(outputs & 0b00000111, "disabled")
@dataclasses.dataclass(frozen=True)
class SetKeyboardOutputEvent(BaseEvent):
keyboard: str
def __post_init__(self) -> None:
assert not self.keyboard or self.keyboard in _KEYBOARD_NAMES_TO_CODES
def make_request(self) -> bytes:
code = _KEYBOARD_NAMES_TO_CODES.get(self.keyboard, 0)
return _make_request(struct.pack(">BBxxx", 0x03, code))
# =====
_MOUSE_NAMES_TO_CODES = {
"disabled": 0b00000000,
"usb": 0b00001000,
"usb_rel": 0b00010000,
"ps2": 0b00011000,
"usb_win98": 0b00100000,
}
_MOUSE_CODES_TO_NAMES = tools.swapped_kvs(_MOUSE_NAMES_TO_CODES)
def get_active_mouse(outputs: int) -> str:
return _MOUSE_CODES_TO_NAMES.get(outputs & 0b00111000, "disabled")
@dataclasses.dataclass(frozen=True)
class SetMouseOutputEvent(BaseEvent):
mouse: str
def __post_init__(self) -> None:
assert not self.mouse or self.mouse in _MOUSE_NAMES_TO_CODES
def make_request(self) -> bytes:
return _make_request(struct.pack(">BBxxx", 0x04, _MOUSE_NAMES_TO_CODES.get(self.mouse, 0)))
# =====
@dataclasses.dataclass(frozen=True)
class SetConnectedEvent(BaseEvent):
connected: bool
def make_request(self) -> bytes:
return _make_request(struct.pack(">BBxxx", 0x05, int(self.connected)))
# =====
class ClearEvent(BaseEvent):
def make_request(self) -> bytes:
return _make_request(b"\x10\x00\x00\x00\x00")
@dataclasses.dataclass(frozen=True)
class KeyEvent(BaseEvent):
name: str
state: bool
def __post_init__(self) -> None:
assert self.name in KEYMAP
def make_request(self) -> bytes:
code = KEYMAP[self.name].mcu.code
return _make_request(struct.pack(">BBBxx", 0x11, code, int(self.state)))
@dataclasses.dataclass(frozen=True)
class MouseButtonEvent(BaseEvent):
name: str
state: bool
def __post_init__(self) -> None:
assert self.name in ["left", "right", "middle", "up", "down"]
def make_request(self) -> bytes:
(code, state_pressed, is_main) = {
"left": (0b10000000, 0b00001000, True),
"right": (0b01000000, 0b00000100, True),
"middle": (0b00100000, 0b00000010, True),
"up": (0b10000000, 0b00001000, False), # Back
"down": (0b01000000, 0b00000100, False), # Forward
}[self.name]
if self.state:
code |= state_pressed
if is_main:
main_code = code
extra_code = 0
else:
main_code = 0
extra_code = code
return _make_request(struct.pack(">BBBxx", 0x13, main_code, extra_code))
@dataclasses.dataclass(frozen=True)
class MouseMoveEvent(BaseEvent):
to_x: int
to_y: int
def __post_init__(self) -> None:
assert MouseRange.MIN <= self.to_x <= MouseRange.MAX
assert MouseRange.MIN <= self.to_y <= MouseRange.MAX
def make_request(self) -> bytes:
return _make_request(struct.pack(">Bhh", 0x12, self.to_x, self.to_y))
@dataclasses.dataclass(frozen=True)
class MouseRelativeEvent(BaseEvent):
delta_x: int
delta_y: int
def __post_init__(self) -> None:
assert -127 <= self.delta_x <= 127
assert -127 <= self.delta_y <= 127
def make_request(self) -> bytes:
return _make_request(struct.pack(">Bbbxx", 0x15, self.delta_x, self.delta_y))
@dataclasses.dataclass(frozen=True)
class MouseWheelEvent(BaseEvent):
delta_x: int
delta_y: int
def __post_init__(self) -> None:
assert -127 <= self.delta_x <= 127
assert -127 <= self.delta_y <= 127
def make_request(self) -> bytes:
# Горизонтальная прокрутка пока не поддерживается
return _make_request(struct.pack(">Bxbxx", 0x14, self.delta_y))
# =====
def check_response(response: bytes) -> bool:
assert len(response) in (4, 8), response
return (_make_crc16(response[:-2]) == struct.unpack(">H", response[-2:])[0])
def _make_request(command: bytes) -> bytes:
assert len(command) == 5, command
request = b"\x33" + command
request += struct.pack(">H", _make_crc16(request))
assert len(request) == 8, request
return request
def _make_crc16(data: bytes) -> int:
crc = 0xFFFF
for byte in data:
crc = crc ^ byte
for _ in range(8):
if crc & 0x0001 == 0:
crc = crc >> 1
else:
crc = crc >> 1
crc = crc ^ 0xA001
return crc
# =====
REQUEST_PING = _make_request(b"\x01\x00\x00\x00\x00")
REQUEST_REPEAT = _make_request(b"\x02\x00\x00\x00\x00")
RESPONSE_LEGACY_OK = b"\x33\x20" + struct.pack(">H", _make_crc16(b"\x33\x20"))
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