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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/>.
# A VTI interface also requires an IPSec configuration - VyOS 1.2 supported
# having a VTI interface in the CLI but no IPSec configuration - drop VTI
# configuration if this is the case for VyOS 1.4
import sys
from vyos.configtree import ConfigTree
if __name__ == '__main__':
if (len(sys.argv) < 1):
print("Must specify file name!")
sys.exit(1)
file_name = sys.argv[1]
with open(file_name, 'r') as f:
config_file = f.read()
config = ConfigTree(config_file)
base = ['interfaces', 'vti']
if not config.exists(base):
# Nothing to do
sys.exit(0)
ipsec_base = ['vpn', 'ipsec', 'site-to-site', 'peer']
for interface in config.list_nodes(base):
found = False
if config.exists(ipsec_base):
for peer in config.list_nodes(ipsec_base):
if config.exists(ipsec_base + [peer, 'vti', 'bind']):
tmp = config.return_value(ipsec_base + [peer, 'vti', 'bind'])
if tmp == interface:
# Interface was found and we no longer need to search
# for it in our IPSec peers
found = True
break
if not found:
config.delete(base + [interface])
try:
with open(file_name, 'w') as f:
f.write(config.to_string())
except OSError as e:
print("Failed to save the modified config: {}".format(e))
sys.exit(1)
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