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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
# Copyright 2019 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
import os
from inspect import signature
from inspect import _empty
from vyos.ifconfig.section import Section
from vyos.util import popen
from vyos.util import cmd
from vyos.util import read_file
from vyos.util import write_file
from vyos import debug
class Control(Section):
_command_get = {}
_command_set = {}
_signature = {}
def __init__(self, **kargs):
# some commands (such as operation comands - show interfaces, etc.)
# need to query the interface statistics. If the interface
# code is used and the debugging is enabled, the screen output
# will include both the command but also the debugging for that command
# to prevent this, debugging can be explicitely disabled
# if debug is not explicitely disabled the the config, enable it
self.debug = ''
if kargs.get('debug', True) and debug.enabled('ifconfig'):
self.debug = 'ifconfig'
def _debug_msg (self, message):
return debug.message(message, self.debug)
def _popen(self, command):
return popen(command, self.debug)
def _cmd(self, command):
return cmd(command, self.debug)
def _get_command(self, config, name):
"""
Using the defined names, set data write to sysfs.
"""
cmd = self._command_get[name]['shellcmd'].format(**config)
return self._command_get[name].get('format', lambda _: _)(self._cmd(cmd))
def _values(self, name, validate, value):
"""
looks at the validation function "validate"
for the interface sysfs or command and
returns a dict with the right options to call it
"""
if name not in self._signature:
self._signature[name] = signature(validate)
values = {}
for k in self._signature[name].parameters:
default = self._signature[name].parameters[k].default
if default is not _empty:
continue
if k == 'self':
values[k] = self
elif k == 'ifname':
values[k] = self.ifname
else:
values[k] = value
return values
def _set_command(self, config, name, value):
"""
Using the defined names, set data write to sysfs.
"""
# the code can pass int as int
value = str(value)
validate = self._command_set[name].get('validate', None)
if validate:
try:
validate(**self._values(name, validate, value))
except Exception as e:
raise e.__class__(f'Could not set {name}. {e}')
convert = self._command_set[name].get('convert', None)
if convert:
value = convert(value)
possible = self._command_set[name].get('possible', None)
if possible and not possible(config['ifname'], value):
return False
config = {**config, **{'value': value}}
cmd = self._command_set[name]['shellcmd'].format(**config)
return self._command_set[name].get('format', lambda _: _)(self._cmd(cmd))
_sysfs_get = {}
_sysfs_set = {}
def _read_sysfs(self, filename):
"""
Provide a single primitive w/ error checking for reading from sysfs.
"""
value = None
if os.path.exists(filename):
value = read_file(filename)
self._debug_msg("read '{}' < '{}'".format(value, filename))
return value
def _write_sysfs(self, filename, value):
"""
Provide a single primitive w/ error checking for writing to sysfs.
"""
if os.path.isfile(filename):
write_file(filename, str(value))
self._debug_msg("write '{}' > '{}'".format(value, filename))
return True
return False
def _get_sysfs(self, config, name):
"""
Using the defined names, get data write from sysfs.
"""
filename = self._sysfs_get[name]['location'].format(**config)
if not filename:
return None
return self._read_sysfs(filename)
def _set_sysfs(self, config, name, value):
"""
Using the defined names, set data write to sysfs.
"""
# the code can pass int as int
value = str(value)
validate = self._sysfs_set[name].get('validate', None)
if validate:
try:
validate(**self._values(name, validate, value))
except Exception as e:
raise e.__class__(f'Could not set {name}. {e}')
config = {**config, **{'value': value}}
convert = self._sysfs_set[name].get('convert', None)
if convert:
value = convert(value)
commited = self._write_sysfs(
self._sysfs_set[name]['location'].format(**config), value)
if not commited:
errmsg = self._sysfs_set.get('errormsg', '')
if errmsg:
raise TypeError(errmsg.format(**config))
return commited
def get_interface(self, name):
if name in self._sysfs_get:
return self._get_sysfs(self.config, name)
if name in self._command_get:
return self._get_command(self.config, name)
raise KeyError(f'{name} is not a attribute of the interface we can get')
def set_interface(self, name, value):
if name in self._sysfs_set:
return self._set_sysfs(self.config, name, value)
if name in self._command_set:
return self._set_command(self.config, name, value)
raise KeyError(f'{name} is not a attribute of the interface we can set')
|
