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# Copyright 2021-2024 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library. 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
from vyos.configtree import ConfigTree
def migrate(config: ConfigTree) -> None:
base = ['interfaces', 'vti']
if not config.exists(base):
# Nothing to do
return
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])
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