# Copyright 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.
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# This library is distributed in the hope that it will be useful,
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# Lesser General Public License for more details.
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# T4982: Retain prior default TLS version (v1.0) when upgrading installations with existing openconnect configurations

from vyos.configtree import ConfigTree

cfg_base = ['vpn', 'openconnect']

def migrate(config: ConfigTree) -> None:
    # bail out early if service is unconfigured
    if not config.exists(cfg_base):
        return

    # new default is TLS 1.2 - set explicit old default value of TLS 1.0 for upgraded configurations to keep compatibility
    tls_min_path = cfg_base + ['tls-version-min']
    if not config.exists(tls_min_path):
        config.set(tls_min_path, value='1.0')