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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/>.
# - T2450: drop interface-route and interface-route6 from "protocols static"
from sys import argv
from sys import exit
from vyos.configtree import ConfigTree
def migrate_interface_route(config, base, path, route_route6):
""" Generic migration function which can be called on every instance of
interface-route, beeing it ipv4, ipv6 or nested under the "static table" nodes.
What we do?
- Drop 'interface-route' or 'interface-route6' and migrate the route unter the
'route' or 'route6' tag node.
"""
if config.exists(base + path):
for route in config.list_nodes(base + path):
interface = config.list_nodes(base + path + [route, 'next-hop-interface'])
tmp = base + path + [route, 'next-hop-interface']
for interface in config.list_nodes(tmp):
new_base = base + [route_route6, route, 'interface']
config.set(new_base)
config.set_tag(base + [route_route6])
config.set_tag(new_base)
config.copy(tmp + [interface], new_base + [interface])
config.delete(base + path)
def migrate_route(config, base, path, route_route6):
""" Generic migration function which can be called on every instance of
route, beeing it ipv4, ipv6 or even nested under the static table nodes.
What we do?
- for consistency reasons rename next-hop-interface to interface
- for consistency reasons rename next-hop-vrf to vrf
"""
if config.exists(base + path):
for route in config.list_nodes(base + path):
next_hop = base + path + [route, 'next-hop']
if config.exists(next_hop):
for gateway in config.list_nodes(next_hop):
# IPv4 routes calls it next-hop-interface, rename this to
# interface instead so it's consitent with IPv6
interface_path = next_hop + [gateway, 'next-hop-interface']
if config.exists(interface_path):
config.rename(interface_path, 'interface')
# When VRFs got introduced, I (c-po) named it next-hop-vrf,
# we can also call it vrf which is simply shorter.
vrf_path = next_hop + [gateway, 'next-hop-vrf']
if config.exists(vrf_path):
config.rename(vrf_path, 'vrf')
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 = ['protocols', 'static']
config = ConfigTree(config_file)
if not config.exists(base):
# Nothing to do
exit(0)
# Migrate interface-route into route
migrate_interface_route(config, base, ['interface-route'], 'route')
# Migrate interface-route6 into route6
migrate_interface_route(config, base, ['interface-route6'], 'route6')
# Cleanup nodes inside route
migrate_route(config, base, ['route'], 'route')
# Cleanup nodes inside route6
migrate_route(config, base, ['route6'], 'route6')
#
# PBR table cleanup
table_path = base + ['table']
if config.exists(table_path):
for table in config.list_nodes(table_path):
# Migrate interface-route into route
migrate_interface_route(config, table_path + [table], ['interface-route'], 'route')
# Migrate interface-route6 into route6
migrate_interface_route(config, table_path + [table], ['interface-route6'], 'route6')
# Cleanup nodes inside route
migrate_route(config, table_path + [table], ['route'], 'route')
# Cleanup nodes inside route6
migrate_route(config, table_path + [table], ['route6'], 'route6')
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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