1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
# ========================================================================== #
# #
# 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 asyncio
import functools
from typing import Tuple
from typing import Dict
from typing import Callable
from typing import Optional
from typing import Any
from ...logging import get_logger
from ... import tools
from ... import aiotools
from ...yamlconf import Option
from ...validators.basic import valid_number
from ...validators.basic import valid_float_f0
from ...validators.basic import valid_float_f01
from ...validators.net import valid_ip_or_host
from ...validators.net import valid_port
from . import BaseUserGpioDriver
from . import GpioDriverOfflineError
# =====
class Plugin(BaseUserGpioDriver): # pylint: disable=too-many-instance-attributes
def __init__(
self,
instance_name: str,
notifier: aiotools.AioNotifier,
host: str,
port: int,
timeout: float,
switch_delay: float,
state_poll: float,
) -> None:
super().__init__(instance_name, notifier)
self.__host = host
self.__port = port
self.__timeout = timeout
self.__switch_delay = switch_delay
self.__state_poll = state_poll
self.__reader: Optional[asyncio.StreamReader] = None
self.__writer: Optional[asyncio.StreamWriter] = None
self.__active: int = -1
self.__update_notifier = aiotools.AioNotifier()
@classmethod
def get_plugin_options(cls) -> Dict:
return {
"host": Option("", type=valid_ip_or_host),
"port": Option(5000, type=valid_port),
"timeout": Option(5.0, type=valid_float_f01),
"switch_delay": Option(1.0, type=valid_float_f0),
"state_poll": Option(10.0, type=valid_float_f01),
}
@classmethod
def get_pin_validator(cls) -> Callable[[Any], Any]:
return functools.partial(valid_number, min=0, max=15, name="Tesmart channel")
async def run(self) -> None:
prev_active = -2
while True:
await self.__update_notifier.wait(self.__state_poll)
try:
self.__active = await self.__send_command(b"\x10\x00")
except Exception:
pass
if self.__active != prev_active:
await self._notifier.notify()
prev_active = self.__active
async def cleanup(self) -> None:
await self.__close_device()
async def read(self, pin: str) -> bool:
return (self.__active == int(pin))
async def write(self, pin: str, state: bool) -> None:
channel = int(pin) + 1
assert 1 <= channel <= 16
if state:
await self.__send_command("{:c}{:c}".format(1, channel).encode())
await self.__update_notifier.notify()
await asyncio.sleep(self.__switch_delay) # Slowdown
# =====
async def __send_command(self, cmd: bytes) -> int:
assert len(cmd) == 2
(reader, writer) = await self.__ensure_device()
try:
writer.write(b"\xAA\xBB\x03%s\xEE" % (cmd))
await asyncio.wait_for(writer.drain(), timeout=self.__timeout)
return (await asyncio.wait_for(reader.readexactly(6), timeout=self.__timeout))[4]
except Exception as err:
get_logger(0).error("Can't send command to Tesmart KVM [%s]:%d: %s",
self.__host, self.__port, tools.efmt(err))
await self.__close_device()
raise GpioDriverOfflineError(self)
async def __ensure_device(self) -> Tuple[asyncio.StreamReader, asyncio.StreamWriter]:
if self.__reader is None or self.__writer is None:
try:
(reader, writer) = await asyncio.wait_for(
asyncio.open_connection(self.__host, self.__port),
timeout=self.__timeout,
)
except Exception as err:
get_logger(0).error("Can't connect to Tesmart KVM [%s]:%d: %s",
self.__host, self.__port, tools.efmt(err))
raise GpioDriverOfflineError(self)
else:
self.__reader = reader
self.__writer = writer
return (self.__reader, self.__writer)
async def __close_device(self) -> None:
if self.__writer:
await aiotools.close_writer(self.__writer)
self.__reader = None
self.__writer = None
self.__active = -1
# =====
def __str__(self) -> str:
return f"Tesmart({self._instance_name})"
__repr__ = __str__
|
