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# Copyright 2022-2024 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/>.
# T4118: Change vpn ipsec syntax for IKE ESP and peer
# T4879: IPsec migration script remote-id for peer name eq address
import re
from vyos.configtree import ConfigTree
base = ['vpn', 'ipsec']
def migrate(config: ConfigTree) -> None:
if not config.exists(base):
# Nothing to do
return
# IKE changes, T4118:
if config.exists(base + ['ike-group']):
for ike_group in config.list_nodes(base + ['ike-group']):
# replace 'ipsec ike-group <tag> mobike disable'
# => 'ipsec ike-group <tag> disable-mobike'
mobike = base + ['ike-group', ike_group, 'mobike']
if config.exists(mobike):
if config.return_value(mobike) == 'disable':
config.set(base + ['ike-group', ike_group, 'disable-mobike'])
config.delete(mobike)
# replace 'ipsec ike-group <tag> ikev2-reauth yes'
# => 'ipsec ike-group <tag> ikev2-reauth'
reauth = base + ['ike-group', ike_group, 'ikev2-reauth']
if config.exists(reauth):
if config.return_value(reauth) == 'yes':
config.delete(reauth)
config.set(reauth)
else:
config.delete(reauth)
# ESP changes
# replace 'ipsec esp-group <tag> compression enable'
# => 'ipsec esp-group <tag> compression'
if config.exists(base + ['esp-group']):
for esp_group in config.list_nodes(base + ['esp-group']):
compression = base + ['esp-group', esp_group, 'compression']
if config.exists(compression):
if config.return_value(compression) == 'enable':
config.delete(compression)
config.set(compression)
else:
config.delete(compression)
# PEER changes
if config.exists(base + ['site-to-site', 'peer']):
for peer in config.list_nodes(base + ['site-to-site', 'peer']):
peer_base = base + ['site-to-site', 'peer', peer]
# replace: 'peer <tag> id x'
# => 'peer <tag> local-id x'
if config.exists(peer_base + ['authentication', 'id']):
config.rename(peer_base + ['authentication', 'id'], 'local-id')
# For the peer '@foo' set remote-id 'foo' if remote-id is not defined
# For the peer '192.0.2.1' set remote-id '192.0.2.1' if remote-id is not defined
if not config.exists(peer_base + ['authentication', 'remote-id']):
tmp = peer.replace('@', '') if peer.startswith('@') else peer
config.set(peer_base + ['authentication', 'remote-id'], value=tmp)
# replace: 'peer <tag> force-encapsulation enable'
# => 'peer <tag> force-udp-encapsulation'
force_enc = peer_base + ['force-encapsulation']
if config.exists(force_enc):
if config.return_value(force_enc) == 'enable':
config.delete(force_enc)
config.set(peer_base + ['force-udp-encapsulation'])
else:
config.delete(force_enc)
# add option: 'peer <tag> remote-address x.x.x.x'
remote_address = peer
if peer.startswith('@'):
remote_address = 'any'
config.set(peer_base + ['remote-address'], value=remote_address)
# Peer name it is swanctl connection name and shouldn't contain dots or colons
# rename peer:
# peer 192.0.2.1 => peer peer_192-0-2-1
# peer 2001:db8::2 => peer peer_2001-db8--2
# peer @foo => peer peer_foo
re_peer_name = re.sub(':|\.', '-', peer)
if re_peer_name.startswith('@'):
re_peer_name = re.sub('@', '', re_peer_name)
new_peer_name = f'peer_{re_peer_name}'
config.rename(peer_base, new_peer_name)
# remote-access/road-warrior changes
if config.exists(base + ['remote-access', 'connection']):
for connection in config.list_nodes(base + ['remote-access', 'connection']):
ra_base = base + ['remote-access', 'connection', connection]
# replace: 'remote-access connection <tag> authentication id x'
# => 'remote-access connection <tag> authentication local-id x'
if config.exists(ra_base + ['authentication', 'id']):
config.rename(ra_base + ['authentication', 'id'], 'local-id')
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