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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/>.
# T5643: move from 'set nat [source|destination] rule X [inbound-interface|outbound interface] <iface>'
# to
# 'set nat [source|destination] rule X [inbound-interface|outbound interface] interface-name <iface>'
# T6100: Migration from 1.3.X to 1.4
# Change IP/netmask to Network/netmask in
# 'set nat [source|destination] rule X [source| destination| translation] address <IP/Netmask| !IP/Netmask>'
import ipaddress
from sys import argv,exit
from vyos.configtree import ConfigTree
def _func_T5643(conf, base_path):
for iface in ['inbound-interface', 'outbound-interface']:
if conf.exists(base_path + [iface]):
tmp = conf.return_value(base_path + [iface])
if tmp:
conf.delete(base_path + [iface])
conf.set(base_path + [iface, 'interface-name'], value=tmp)
return
def _func_T6100(conf, base_path):
for addr_type in ['source', 'destination', 'translation']:
base_addr_type = base_path + [addr_type]
if not conf.exists(base_addr_type) or not conf.exists(
base_addr_type + ['address']):
continue
address = conf.return_value(base_addr_type + ['address'])
if not address or '/' not in address:
continue
negative = ''
network = address
if '!' in address:
negative = '!'
network = str(address.split(negative)[1])
network_ip = ipaddress.ip_network(network, strict=False)
if str(network_ip) != network:
network = f'{negative}{str(network_ip)}'
conf.set(base_addr_type + ['address'], value=network)
return
if __name__ == '__main__':
if len(argv) < 2:
print("Must specify file name!")
exit(1)
file_name = argv[1]
with open(file_name, 'r') as f:
config_file = f.read()
config = ConfigTree(config_file)
if not config.exists(['nat']):
# Nothing to do
exit(0)
for direction in ['source', 'destination']:
# If a node doesn't exist, we obviously have nothing to do.
if not config.exists(['nat', direction]):
continue
# However, we also need to handle the case when a 'source' or 'destination' sub-node does exist,
# but there are no rules under it.
if not config.list_nodes(['nat', direction]):
continue
for rule in config.list_nodes(['nat', direction, 'rule']):
base = ['nat', direction, 'rule', rule]
_func_T5643(config,base)
_func_T6100(config,base)
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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