#!/usr/bin/env python3 # # Copyright (C) 2021-2022 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/>. # T3741: no-ipv4-unicast is now enabled by default from sys import argv from sys import 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() base = ['protocols', 'bgp'] config = ConfigTree(config_file) if not config.exists(base): # Nothing to do exit(0) # This is now a default option - simply delete it. # As it was configured explicitly - we can also bail out early as we need to # do nothing! if config.exists(base + ['parameters', 'default', 'no-ipv4-unicast']): config.delete(base + ['parameters', 'default', 'no-ipv4-unicast']) # Check if the "default" node is now empty, if so - remove it if len(config.list_nodes(base + ['parameters', 'default'])) == 0: config.delete(base + ['parameters', 'default']) # Check if the "default" node is now empty, if so - remove it if len(config.list_nodes(base + ['parameters'])) == 0: config.delete(base + ['parameters']) else: # As we now install a new default option into BGP we need to migrate all # existing BGP neighbors and restore the old behavior if config.exists(base + ['neighbor']): for neighbor in config.list_nodes(base + ['neighbor']): peer_group = base + ['neighbor', neighbor, 'peer-group'] if config.exists(peer_group): peer_group_name = config.return_value(peer_group) # peer group enables old behavior for neighbor - bail out if config.exists(base + ['peer-group', peer_group_name, 'address-family', 'ipv4-unicast']): continue afi_ipv4 = base + ['neighbor', neighbor, 'address-family', 'ipv4-unicast'] if not config.exists(afi_ipv4): config.set(afi_ipv4) try: with open(file_name, 'w') as f: f.write(config.to_string()) except OSError as e: print(f'Failed to save the modified config: {e}') exit(1)