#!/usr/bin/env python3 # # Copyright (C) 2018-2023 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 . from sys import exit from vyos.config import Config from vyos.configdict import dict_merge from vyos.configdict import get_interface_dict from vyos.configdict import is_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.configverify import verify_mirror_redirect from vyos.configverify import verify_bond_bridge_member from vyos.ifconfig import WireGuardIf from vyos.utils.kernel import check_kmod from vyos.utils.network import check_port_availability from vyos.utils.network import is_wireguard_key_pair 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'] ifname, wireguard = get_interface_dict(conf, base) # Check if a port was changed tmp = is_node_changed(conf, base + [ifname, 'port']) if tmp: wireguard['port_changed'] = {} # T4702: If anything on a peer changes we remove the peer first and re-add it if is_node_changed(conf, base + [ifname, 'peer']): wireguard.update({'rebuild_required': {}}) 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) verify_bond_bridge_member(wireguard) verify_mirror_redirect(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 'port_changed' in wireguard: listen_port = int(wireguard['port']) if check_port_availability('0.0.0.0', listen_port, 'udp') is not True: raise ConfigError(f'UDP port {listen_port} is busy or unavailable and ' 'cannot be used for the interface!') # run checks on individual configured WireGuard peer public_keys = [] 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!') if peer['public_key'] in public_keys: raise ConfigError(f'Duplicate public-key defined on peer "{tmp}"') if 'disable' not in peer: if is_wireguard_key_pair(wireguard['private_key'], peer['public_key']): raise ConfigError(f'Peer "{tmp}" has the same public key as the interface "{wireguard["ifname"]}"') public_keys.append(peer['public_key']) def apply(wireguard): if 'rebuild_required' in wireguard or 'deleted' in wireguard: wg = WireGuardIf(**wireguard) # WireGuard only supports peer removal based on the configured public-key, # by deleting the entire interface this is the shortcut instead of parsing # out all peers and removing them one by one. # # Peer reconfiguration will always come with a short downtime while the # WireGuard interface is recreated (see below) wg.remove() # Create the new interface if required if 'deleted' not in wireguard: wg = WireGuardIf(**wireguard) wg.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)