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#!/usr/bin/env python3
#
# Copyright (C) 2018-2020 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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 <http://www.gnu.org/licenses/>.
import os
from copy import deepcopy
from sys import exit
from vyos.config import Config
from vyos.template import render
from vyos.util import call
from vyos import ConfigError
config_file = r'/run/ser2net/ser2net.conf'
default_config_data = {
'devices': [],
}
def get_config():
proxy = deepcopy(default_config_data)
conf = Config()
base = ['service', 'serial-proxy']
if not conf.exists(base):
return None
else:
conf.set_level(base)
for serial_port in conf.list_nodes(['device']):
conf.set_level(base + ['device', serial_port])
serial = {
'data_bits': '',
'parity': '',
'port': '',
'serial_port': '/dev/serial/by-bus/' + serial_port,
'speed': '',
'stop_bits': '',
'timeout': '600'
}
if conf.exists(['data-bits']):
serial['data_bits'] = conf.return_value(['data-bits'])
if conf.exists(['stop-bits']):
serial['stop_bits'] = conf.return_value(['stop-bits'])
if conf.exists(['parity']):
serial['parity'] = conf.return_value(['parity'])
if conf.exists(['port']):
serial['port'] = conf.return_value(['port'])
if conf.exists(['speed']):
serial['speed'] = conf.return_value(['speed'])
proxy['devices'].append(serial)
return proxy
def verify(proxy):
if not proxy:
return None
for device in proxy['devices']:
if not os.path.exists('{serial_port}'.format(**device)):
raise ConfigError('Serial interface "{serial_port} does not exist"'
.format(**device))
for key in ['data_bits', 'parity', 'port', 'speed', 'stop_bits']:
if not device[key]:
value = key.replace('_','-')
raise ConfigError(f'{value} option must be defined!')
return None
def generate(proxy):
if not proxy:
return None
render(config_file, 'ser2net/ser2net.conf.tmpl', proxy)
return None
def apply(proxy):
if not proxy:
call('systemctl stop ser2net.service')
if os.path.isfile(config_file):
os.unlink(config_file)
return None
call('systemctl start ser2net.service')
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
exit(1)
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