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#!/usr/bin/env python3
#
# Copyright VyOS maintainers and contributors <maintainers@vyos.io>
#
# 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 sys import exit
from vyos.config import Config
from vyos.configverify import verify_interface_exists
from vyos.utils.process import call
from vyos.template import render
from vyos import ConfigError
from vyos import airbag
airbag.enable()
systemd_service = 'ndppd.service'
ndppd_config = '/run/ndppd/ndppd.conf'
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['service', 'ndp-proxy']
if not conf.exists(base):
return None
ndpp = conf.get_config_dict(base, key_mangling=('-', '_'),
get_first_key=True,
with_recursive_defaults=True)
return ndpp
def verify(ndpp):
if not ndpp:
return None
if 'interface' not in ndpp:
return None
for interface, interface_config in ndpp['interface'].items():
if 'disable' in interface_config:
continue
verify_interface_exists(ndpp, interface)
if 'prefix' not in interface_config:
continue
for prefix, prefix_config in interface_config['prefix'].items():
if 'disable' in prefix_config:
continue
mode = prefix_config.get('mode')
prefix_interface = prefix_config.get('interface')
if mode == 'interface':
if not prefix_interface:
raise ConfigError(f'Prefix "{prefix}" uses interface mode but no interface defined!')
verify_interface_exists(ndpp, prefix_interface)
continue
if prefix_interface:
raise ConfigError(f'Prefix "{prefix}" does not use interface mode, thus interface cannot be defined!')
return None
def generate(ndpp):
if not ndpp:
return None
render(ndppd_config, 'ndppd/ndppd.conf.j2', ndpp)
return None
def apply(ndpp):
if not ndpp:
call(f'systemctl stop {systemd_service}')
if os.path.isfile(ndppd_config):
os.unlink(ndppd_config)
return None
call(f'systemctl reload-or-restart {systemd_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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