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#!/usr/bin/env python3
#
# Copyright (C) 2021 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/>.
# T1968: allow multiple static-routes to be configured
# T3838: rename dns-server -> name-server
import sys
from vyos.configtree import ConfigTree
if (len(sys.argv) < 1):
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
# Run this for every specified 'subnet'
for subnet in config.list_nodes(base_network + ['subnet']):
base_subnet = base_network + ['subnet', subnet]
# T1968: allow multiple static-routes to be configured
if config.exists(base_subnet + ['static-route']):
prefix = config.return_value(base_subnet + ['static-route', 'destination-subnet'])
router = config.return_value(base_subnet + ['static-route', 'router'])
config.delete(base_subnet + ['static-route'])
config.set(base_subnet + ['static-route', prefix, 'next-hop'], value=router)
config.set_tag(base_subnet + ['static-route'])
# T3838: rename dns-server -> name-server
if config.exists(base_subnet + ['dns-server']):
config.rename(base_subnet + ['dns-server'], 'name-server')
# T3672: ISC DHCP server only supports one failover peer
if config.exists(base_subnet + ['failover']):
# There can only be one failover configuration, if none is present
# we add the first one
if not config.exists(base + ['failover']):
local = config.return_value(base_subnet + ['failover', 'local-address'])
remote = config.return_value(base_subnet + ['failover', 'peer-address'])
status = config.return_value(base_subnet + ['failover', 'status'])
name = config.return_value(base_subnet + ['failover', 'name'])
config.set(base + ['failover', 'remote'], value=remote)
config.set(base + ['failover', 'source-address'], value=local)
config.set(base + ['failover', 'status'], value=status)
config.set(base + ['failover', 'name'], value=name)
config.delete(base_subnet + ['failover'])
config.set(base_subnet + ['enable-failover'])
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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