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#!/usr/bin/env python3
#
# Copyright (C) 2023 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 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', 'neighbor-proxy']
config = conf.get_config_dict(base, get_first_key=True)
return config
def verify(config):
if 'arp' in config:
for neighbor, neighbor_conf in config['arp'].items():
if 'interface' not in neighbor_conf:
raise ConfigError(
f"ARP neighbor-proxy for '{neighbor}' requires an interface to be set!"
)
if 'nd' in config:
for neighbor, neighbor_conf in config['nd'].items():
if 'interface' not in neighbor_conf:
raise ConfigError(
f"ARP neighbor-proxy for '{neighbor}' requires an interface to be set!"
)
def generate(config):
pass
def apply(config):
if not config:
# Cleanup proxy
call('ip neighbor flush proxy')
call('ip -6 neighbor flush proxy')
return None
# Add proxy ARP
if 'arp' in config:
# Cleanup entries before config
call('ip neighbor flush proxy')
for neighbor, neighbor_conf in config['arp'].items():
for interface in neighbor_conf.get('interface'):
call(f'ip neighbor add proxy {neighbor} dev {interface}')
# Add proxy NDP
if 'nd' in config:
# Cleanup entries before config
call('ip -6 neighbor flush proxy')
for neighbor, neighbor_conf in config['nd'].items():
for interface in neighbor_conf['interface']:
call(f'ip -6 neighbor add proxy {neighbor} 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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