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#!/usr/bin/env python3
#
# Copyright (C) 2021 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/>.
## Script called up strongswan to bring the vti interface up/down based on the state of the IPSec tunnel.
## Called as vti_up_down vti_intf_name
import os
import sys
from syslog import syslog
from syslog import openlog
from syslog import LOG_PID
from syslog import LOG_INFO
from vyos.configquery import ConfigTreeQuery
from vyos.util import call
from vyos.util import get_interface_config
from vyos.util import get_interface_address
def get_dhcp_address(interface):
addr = get_interface_address(interface)
if not addr:
return None
if len(addr['addr_info']) == 0:
return None
return addr['addr_info'][0]['local']
if __name__ == '__main__':
verb = os.getenv('PLUTO_VERB')
connection = os.getenv('PLUTO_CONNECTION')
interface = sys.argv[1]
dhcp_interface = sys.argv[2]
openlog(ident=f'vti-up-down', logoption=LOG_PID, facility=LOG_INFO)
syslog(f'Interface {interface} {verb} {connection}')
if verb in ['up-client', 'up-host']:
call('sudo ip route delete default table 220')
vti_link = get_interface_config(interface)
if not vti_link:
syslog(f'Interface {interface} not found')
sys.exit(0)
vti_link_up = (vti_link['operstate'] == 'UP' if 'operstate' in vti_link else False)
config = ConfigTreeQuery()
vti_dict = config.get_config_dict(['interfaces', 'vti', interface],
get_first_key=True)
if verb in ['up-client', 'up-host']:
if not vti_link_up:
if dhcp_interface != 'no':
local_ip = get_dhcp_address(dhcp_interface)
call(f'sudo ip tunnel change {interface} local {local_ip}')
if 'disable' not in vti_dict:
call(f'sudo ip link set {interface} up')
else:
syslog(f'Interface {interface} is admin down ...')
elif verb in ['down-client', 'down-host']:
if vti_link_up:
call(f'sudo ip link set {interface} down')
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