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#!/usr/bin/env python3
#
# Copyright (C) 2023 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/>.
# T5681: Firewall re-writing. Simplify cli when mathcing interface
# From
# 'set nat [source|destination] rule X [inbound-interface|outbound interface] interface-name <iface>'
# 'set nat [source|destination] rule X [inbound-interface|outbound interface] interface-group <iface_group>'
# to
# 'set nat [source|destination] rule X [inbound-interface|outbound interface] name <iface>'
# 'set nat [source|destination] rule X [inbound-interface|outbound interface] group <iface_group>'
# Also remove command if interface == any
from sys import argv,exit
from vyos.configtree import ConfigTree
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]
for iface in ['inbound-interface','outbound-interface']:
if config.exists(base + [iface]):
if config.exists(base + [iface, 'interface-name']):
tmp = config.return_value(base + [iface, 'interface-name'])
if tmp != 'any':
config.delete(base + [iface, 'interface-name'])
config.set(base + [iface, 'name'], value=tmp)
else:
config.delete(base + [iface])
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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