#!/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/>. # - T3037, BGP address-family ipv6-unicast capability dynamic does not exist in # FRR, there is only a base, per neighbor dynamic capability, migrate config from sys import argv from sys import exit from vyos.configtree import ConfigTree from vyos.template import is_ipv4 from vyos.template import is_ipv6 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]] for neighbor_type in ['neighbor', 'peer-group']: if not config.exists(bgp_base + [neighbor_type]): continue for neighbor in config.list_nodes(bgp_base + [neighbor_type]): # T2844 - add IPv4 AFI disable-send-community support send_comm_path = bgp_base + [neighbor_type, neighbor, 'disable-send-community'] if config.exists(send_comm_path): new_base = bgp_base + [neighbor_type, neighbor, 'address-family', 'ipv4-unicast'] config.set(new_base) config.copy(send_comm_path, new_base + ['disable-send-community']) config.delete(send_comm_path) cap_dynamic = False peer_group = None for afi in ['ipv4-unicast', 'ipv6-unicast']: afi_path = bgp_base + [neighbor_type, neighbor, 'address-family', afi] # Exit loop early if AFI does not exist if not config.exists(afi_path): continue cap_path = afi_path + ['capability', 'dynamic'] if config.exists(cap_path): cap_dynamic = True config.delete(cap_path) # We have now successfully migrated the address-family # specific dynamic capability to the neighbor/peer-group # level. If this has been the only option under the # address-family nodes, we can clean them up by checking if # no other nodes are left under that tree and if so, delete # the parent. # # We walk from the most inner node to the most outer one. cleanup = -1 while len(config.list_nodes(cap_path[:cleanup])) == 0: config.delete(cap_path[:cleanup]) cleanup -= 1 peer_group_path = afi_path + ['peer-group'] if config.exists(peer_group_path): if ((is_ipv4(neighbor) and afi == 'ipv4-unicast') or (is_ipv6(neighbor) and afi == 'ipv6-unicast')): peer_group = config.return_value(peer_group_path) config.delete(peer_group_path) # We have now successfully migrated the address-family # specific peer-group to the neighbor level. If this has # been the only option under the address-family nodes, we # can clean them up by checking if no other nodes are left # under that tree and if so, delete the parent. # # We walk from the most inner node to the most outer one. cleanup = -1 while len(config.list_nodes(peer_group_path[:cleanup])) == 0: config.delete(peer_group_path[:cleanup]) cleanup -= 1 if cap_dynamic: config.set(bgp_base + [neighbor_type, neighbor, 'capability', 'dynamic']) if peer_group: config.set(bgp_base + [neighbor_type, neighbor, 'peer-group'], value=peer_group) 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)