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#!/usr/bin/env python3
#
# Copyright (C) 2018-2022 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/>.
from sys import exit
from vyos.config import Config
from vyos.configdict import node_changed
from vyos.utils.process import call
from vyos import ConfigError
from vyos import airbag
airbag.enable()
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
base = ['protocols', 'static', 'arp']
arp = conf.get_config_dict(base, get_first_key=True)
if 'interface' in arp:
for interface in arp['interface']:
tmp = node_changed(conf, base + ['interface', interface, 'address'], recursive=True)
if tmp: arp['interface'][interface].update({'address_old' : tmp})
return arp
def verify(arp):
pass
def generate(arp):
pass
def apply(arp):
if not arp:
return None
if 'interface' in arp:
for interface, interface_config in arp['interface'].items():
# Delete old static ARP assignments first
if 'address_old' in interface_config:
for address in interface_config['address_old']:
call(f'ip neigh del {address} dev {interface}')
# Add new static ARP entries to interface
if 'address' not in interface_config:
continue
for address, address_config in interface_config['address'].items():
mac = address_config['mac']
call(f'ip neigh replace {address} lladdr {mac} dev {interface}')
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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