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#!/usr/bin/env python3
#
# Copyright (C) 2024 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/>.
# T6079: Disable duplicate static mappings
import sys
from vyos.configtree import ConfigTree
if len(sys.argv) < 2:
print("Must specify file name!")
sys.exit(1)
file_name = sys.argv[1]
with open(file_name, 'r') as f:
config_file = f.read()
base = ['service', 'dhcp-server']
config = ConfigTree(config_file)
if not config.exists(base + ['shared-network-name']):
# Nothing to do
exit(0)
# 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)
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))
exit(1)
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