#!/usr/bin/env python3 # # Copyright (C) 2019 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.ifconfig import GeneveIf, Interface from vyos import ConfigError from netifaces import interfaces default_config_data = { 'address': [], 'deleted': False, 'description': '', 'disable': False, 'intf': '', 'ip_arp_cache_tmo': 30, 'ip_proxy_arp': 0, 'mtu': 1500, 'remote': '', 'vni': '' } def get_config(): geneve = deepcopy(default_config_data) conf = Config() # determine tagNode instance if 'VYOS_TAGNODE_VALUE' not in os.environ: raise ConfigError('Interface (VYOS_TAGNODE_VALUE) not specified') geneve['intf'] = os.environ['VYOS_TAGNODE_VALUE'] # Check if interface has been removed if not conf.exists('interfaces geneve ' + geneve['intf']): geneve['deleted'] = True return geneve # set new configuration level conf.set_level('interfaces geneve ' + geneve['intf']) # retrieve configured interface addresses if conf.exists('address'): geneve['address'] = conf.return_values('address') # retrieve interface description if conf.exists('description'): geneve['description'] = conf.return_value('description') # Disable this interface if conf.exists('disable'): geneve['disable'] = True # ARP cache entry timeout in seconds if conf.exists('ip arp-cache-timeout'): geneve['ip_arp_cache_tmo'] = int(conf.return_value('ip arp-cache-timeout')) # Enable proxy-arp on this interface if conf.exists('ip enable-proxy-arp'): geneve['ip_proxy_arp'] = 1 # Maximum Transmission Unit (MTU) if conf.exists('mtu'): geneve['mtu'] = int(conf.return_value('mtu')) # Remote address of GENEVE tunnel if conf.exists('remote'): geneve['remote'] = conf.return_value('remote') # Virtual Network Identifier if conf.exists('vni'): geneve['vni'] = conf.return_value('vni') return geneve def verify(geneve): if geneve['deleted']: # bail out early return None if not geneve['remote']: raise ConfigError('GENEVE remote must be configured') if not geneve['vni']: raise ConfigError('GENEVE VNI must be configured') return None def generate(geneve): return None def apply(geneve): # Check if GENEVE interface already exists if geneve['intf'] in interfaces(): g = GeneveIf(geneve['intf']) # GENEVE is super picky and the tunnel always needs to be recreated, # thus we can simply always delete it first. g.remove() if not geneve['deleted']: # GENEVE interface needs to be created on-block # instead of passing a ton of arguments, I just use a dict # that is managed by vyos.ifconfig conf = deepcopy(GeneveIf.get_config()) # Assign GENEVE instance configuration parameters to config dict conf['vni'] = geneve['vni'] conf['remote'] = geneve['remote'] # Finally create the new interface g = GeneveIf(geneve['intf'], **conf) # update interface description used e.g. by SNMP g.set_alias(geneve['description']) # Maximum Transfer Unit (MTU) g.set_mtu(geneve['mtu']) # configure ARP cache timeout in milliseconds g.set_arp_cache_tmo(geneve['ip_arp_cache_tmo']) # Enable proxy-arp on this interface g.set_proxy_arp(geneve['ip_proxy_arp']) # Configure interface address(es) - no need to implicitly delete the # old addresses as they have already been removed by deleting the # interface above for addr in geneve['address']: g.add_addr(addr) # As the GENEVE interface is always disabled first when changing # parameters we will only re-enable the interface if it is not # administratively disabled if not geneve['disable']: g.set_state('up') return None if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)