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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/>.
# T6079: Disable duplicate static mappings
from vyos.configtree import ConfigTree
base = ['service', 'dhcp-server']
def migrate(config: ConfigTree) -> None:
if not config.exists(base + ['shared-network-name']):
# Nothing to do
return
# Run this for every instance if 'shared-network-name'
for network in config.list_nodes(base + ['shared-network-name']):
base_network = base + ['shared-network-name', network]
if not config.exists(base_network + ['subnet']):
continue
for subnet in config.list_nodes(base_network + ['subnet']):
base_subnet = base_network + ['subnet', subnet]
if config.exists(base_subnet + ['static-mapping']):
used_mac = []
used_ip = []
for mapping in config.list_nodes(base_subnet + ['static-mapping']):
base_mapping = base_subnet + ['static-mapping', mapping]
if config.exists(base_mapping + ['mac-address']):
mac = config.return_value(base_mapping + ['mac-address'])
if mac in used_mac:
config.set(base_mapping + ['disable'])
else:
used_mac.append(mac)
if config.exists(base_mapping + ['ip-address']):
ip = config.return_value(base_mapping + ['ip-address'])
if ip in used_ip:
config.set(base_subnet + ['static-mapping', mapping, 'disable'])
else:
used_ip.append(ip)
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