#!/usr/bin/env python3 # # Copyright (C) 2020 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/>. # # migrate disable-dhcp-nameservers (boolean) to name-servers-dhcp <interface> # if disable-dhcp-nameservers is set, just remove it # else retrieve all interface names that have configured dhcp(v6) address and # add them to the new name-servers-dhcp node from sys import argv, exit from vyos.ifconfig import Interface from vyos.configtree import ConfigTree if (len(argv) < 1): print("Must specify file name!") exit(1) file_name = argv[1] with open(file_name, 'r') as f: config_file = f.read() config = ConfigTree(config_file) base = ['system'] if not config.exists(base): # Nothing to do exit(0) if config.exists(base + ['disable-dhcp-nameservers']): config.delete(base + ['disable-dhcp-nameservers']) else: dhcp_interfaces = [] # go through all interfaces searching for 'address dhcp(v6)?' for sect in Interface.sections(): sect_base = ['interfaces', sect] if not config.exists(sect_base): continue for intf in config.list_nodes(sect_base): intf_base = sect_base + [intf] # try without vlans if config.exists(intf_base + ['address']): for addr in config.return_values(intf_base + ['address']): if addr in ['dhcp', 'dhcpv6']: dhcp_interfaces.append(intf) # try vif if config.exists(intf_base + ['vif']): for vif in config.list_nodes(intf_base + ['vif']): vif_base = intf_base + ['vif', vif] if config.exists(vif_base + ['address']): for addr in config.return_values(vif_base + ['address']): if addr in ['dhcp', 'dhcpv6']: dhcp_interfaces.append(f'{intf}.{vif}') # try vif-s if config.exists(intf_base + ['vif-s']): for vif_s in config.list_nodes(intf_base + ['vif-s']): vif_s_base = intf_base + ['vif-s', vif_s] if config.exists(vif_s_base + ['address']): for addr in config.return_values(vif_s_base + ['address']): if addr in ['dhcp', 'dhcpv6']: dhcp_interfaces.append(f'{intf}.{vif_s}') # try vif-c if config.exists(intf_base + ['vif-c', vif_c]): for vif_c in config.list_nodes(vif_s_base + ['vif-c', vif_c]): vif_c_base = vif_s_base + ['vif-c', vif_c] if config.exists(vif_c_base + ['address']): for addr in config.return_values(vif_c_base + ['address']): if addr in ['dhcp', 'dhcpv6']: dhcp_interfaces.append(f'{intf}.{vif_s}.{vif_c}') # set new config nodes for intf in dhcp_interfaces: config.set(base + ['name-servers-dhcp'], value=intf, replace=False) # delete old node config.delete(base + ['disable-dhcp-nameservers']) 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) exit(0)