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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/>.
# T3090: migrate "firewall options interface <name> adjust-mss" to the
# individual interface.
from sys import argv
from sys import exit
from vyos.configtree import ConfigTree
from vyos.ifconfig import Section
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()
base = ['firewall', 'options', 'interface']
config = ConfigTree(config_file)
if not config.exists(base):
# Nothing to do
exit(0)
for interface in config.list_nodes(base):
if config.exists(base + [interface, 'disable']):
continue
if config.exists(base + [interface, 'adjust-mss']):
section = Section.section(interface)
tmp = config.return_value(base + [interface, 'adjust-mss'])
vlan = interface.split('.')
base_interface_path = ['interfaces', section, vlan[0]]
if len(vlan) == 1:
# Normal interface, no VLAN
config.set(base_interface_path + ['ip', 'adjust-mss'], value=tmp)
elif len(vlan) == 2:
# Regular VIF or VIF-S interface - we need to check the config
vif = vlan[1]
if config.exists(base_interface_path + ['vif', vif]):
config.set(base_interface_path + ['vif', vif, 'ip', 'adjust-mss'], value=tmp)
elif config.exists(base_interface_path + ['vif-s', vif]):
config.set(base_interface_path + ['vif-s', vif, 'ip', 'adjust-mss'], value=tmp)
elif len(vlan) == 3:
# VIF-S interface with VIF-C subinterface
vif_s = vlan[1]
vif_c = vlan[2]
config.set(base_interface_path + ['vif-s', vif_s, 'vif-c', vif_c, 'ip', 'adjust-mss'], value=tmp)
config.set_tag(base_interface_path + ['vif-s'])
config.set_tag(base_interface_path + ['vif-s', vif_s, 'vif-c'])
if config.exists(base + [interface, 'adjust-mss6']):
section = Section.section(interface)
tmp = config.return_value(base + [interface, 'adjust-mss6'])
vlan = interface.split('.')
base_interface_path = ['interfaces', section, vlan[0]]
if len(vlan) == 1:
# Normal interface, no VLAN
config.set(['interfaces', section, interface, 'ipv6', 'adjust-mss'], value=tmp)
elif len(vlan) == 2:
# Regular VIF or VIF-S interface - we need to check the config
vif = vlan[1]
if config.exists(base_interface_path + ['vif', vif]):
config.set(base_interface_path + ['vif', vif, 'ipv6', 'adjust-mss'], value=tmp)
config.set_tag(base_interface_path + ['vif'])
elif config.exists(base_interface_path + ['vif-s', vif]):
config.set(base_interface_path + ['vif-s', vif, 'ipv6', 'adjust-mss'], value=tmp)
config.set_tag(base_interface_path + ['vif-s'])
elif len(vlan) == 3:
# VIF-S interface with VIF-C subinterface
vif_s = vlan[1]
vif_c = vlan[2]
config.set(base_interface_path + ['vif-s', vif_s, 'vif-c', vif_c, 'ipv6', 'adjust-mss'], value=tmp)
config.set_tag(base_interface_path + ['vif-s'])
config.set_tag(base_interface_path + ['vif-s', vif_s, 'vif-c'])
config.delete(['firewall', 'options'])
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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