#!/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/>. # - T3391: Migrate "maximum-paths" setting from "protocols bgp asn maximum-paths" # under the IPv4 address-family tree. Reason is we currently have no way in # configuring this for IPv6 address-family. This mimics the FRR configuration. 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) # Check if BGP is actually configured and obtain the ASN asn_list = config.list_nodes(base) if asn_list: # There's always just one BGP node, if any bgp_base = base + [asn_list[0]] maximum_paths = bgp_base + ['maximum-paths'] if config.exists(maximum_paths): for bgp_type in ['ebgp', 'ibgp']: if config.exists(maximum_paths + [bgp_type]): new_base = bgp_base + ['address-family', 'ipv4-unicast', 'maximum-paths'] config.set(new_base) config.copy(maximum_paths + [bgp_type], new_base + [bgp_type]) config.delete(maximum_paths) 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)