#!/usr/bin/env python3 # # Copyright (C) 2018-2020 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/>. import os from sys import exit from copy import deepcopy from vyos.config import Config from vyos.configdict import dict_merge from vyos.configdict import get_interface_dict from vyos.configdict import node_changed from vyos.configdict import leaf_node_changed from vyos.configverify import verify_vrf from vyos.configverify import verify_address from vyos.configverify import verify_bridge_delete from vyos.configverify import verify_mtu_ipv6 from vyos.ifconfig import WireGuardIf from vyos.util import check_kmod from vyos.util import check_port_availability from vyos import ConfigError from vyos import airbag airbag.enable() def get_config(config=None): """ Retrive CLI config as dictionary. Dictionary can never be empty, as at least the interface name will be added or a deleted flag """ if config: conf = config else: conf = Config() base = ['interfaces', 'wireguard'] wireguard = get_interface_dict(conf, base) # Check if a port was changed wireguard['port_changed'] = leaf_node_changed(conf, ['port']) # Determine which Wireguard peer has been removed. # Peers can only be removed with their public key! dict = {} tmp = node_changed(conf, ['peer'], key_mangling=('-', '_')) for peer in (tmp or []): public_key = leaf_node_changed(conf, ['peer', peer, 'public_key']) if public_key: dict = dict_merge({'peer_remove' : {peer : {'public_key' : public_key[0]}}}, dict) wireguard.update(dict) return wireguard def verify(wireguard): if 'deleted' in wireguard: verify_bridge_delete(wireguard) return None verify_mtu_ipv6(wireguard) verify_address(wireguard) verify_vrf(wireguard) if 'private_key' not in wireguard: raise ConfigError('Wireguard private-key not defined') if 'peer' not in wireguard: raise ConfigError('At least one Wireguard peer is required!') if 'port' in wireguard and wireguard['port_changed']: listen_port = int(wireguard['port']) if check_port_availability('0.0.0.0', listen_port, 'udp') is not True: raise ConfigError( f'The UDP port {listen_port} is busy or unavailable and cannot be used for the interface' ) # run checks on individual configured WireGuard peer for tmp in wireguard['peer']: peer = wireguard['peer'][tmp] if 'allowed_ips' not in peer: raise ConfigError(f'Wireguard allowed-ips required for peer "{tmp}"!') if 'public_key' not in peer: raise ConfigError(f'Wireguard public-key required for peer "{tmp}"!') if ('address' in peer and 'port' not in peer) or ('port' in peer and 'address' not in peer): raise ConfigError('Both Wireguard port and address must be defined ' f'for peer "{tmp}" if either one of them is set!') def apply(wireguard): tmp = WireGuardIf(wireguard['ifname']) if 'deleted' in wireguard: tmp.remove() return None tmp.update(wireguard) return None if __name__ == '__main__': try: check_kmod('wireguard') c = get_config() verify(c) apply(c) except ConfigError as e: print(e) exit(1)