#!/usr/bin/env python3 # # Copyright (C) 2021-2023 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 . import os from sys import exit from sys import argv from vyos.config import Config from vyos.configdict import dict_merge from vyos.configdict import node_changed from vyos.configverify import verify_common_route_maps from vyos.configverify import verify_route_map from vyos.configverify import verify_interface_exists from vyos.template import render_to_string from vyos.ifconfig import Interface from vyos.util import dict_search from vyos.util import get_interface_config from vyos.xml import defaults from vyos import ConfigError from vyos import frr from vyos import airbag airbag.enable() def get_config(config=None): if config: conf = config else: conf = Config() vrf = None if len(argv) > 1: vrf = argv[1] base_path = ['protocols', 'ospfv3'] # eqivalent of the C foo ? 'a' : 'b' statement base = vrf and ['vrf', 'name', vrf, 'protocols', 'ospfv3'] or base_path ospfv3 = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True) # Assign the name of our VRF context. This MUST be done before the return # statement below, else on deletion we will delete the default instance # instead of the VRF instance. if vrf: ospfv3['vrf'] = vrf # FRR has VRF support for different routing daemons. As interfaces belong # to VRFs - or the global VRF, we need to check for changed interfaces so # that they will be properly rendered for the FRR config. Also this eases # removal of interfaces from the running configuration. interfaces_removed = node_changed(conf, base + ['interface']) if interfaces_removed: ospfv3['interface_removed'] = list(interfaces_removed) # Bail out early if configuration tree does not exist if not conf.exists(base): ospfv3.update({'deleted' : ''}) return ospfv3 # We have gathered the dict representation of the CLI, but there are default # options which we need to update into the dictionary retrived. # XXX: Note that we can not call defaults(base), as defaults does not work # on an instance of a tag node. As we use the exact same CLI definition for # both the non-vrf and vrf version this is absolutely safe! default_values = defaults(base_path) # We have to cleanup the default dict, as default values could enable features # which are not explicitly enabled on the CLI. Example: default-information # originate comes with a default metric-type of 2, which will enable the # entire default-information originate tree, even when not set via CLI so we # need to check this first and probably drop that key. if dict_search('default_information.originate', ospfv3) is None: del default_values['default_information'] # XXX: T2665: we currently have no nice way for defaults under tag nodes, # clean them out and add them manually :( del default_values['interface'] # merge in remaining default values ospfv3 = dict_merge(default_values, ospfv3) # We also need some additional information from the config, prefix-lists # and route-maps for instance. They will be used in verify(). # # XXX: one MUST always call this without the key_mangling() option! See # vyos.configverify.verify_common_route_maps() for more information. tmp = conf.get_config_dict(['policy']) # Merge policy dict into "regular" config dict ospfv3 = dict_merge(tmp, ospfv3) return ospfv3 def verify(ospfv3): if not ospfv3: return None verify_common_route_maps(ospfv3) # As we can have a default-information route-map, we need to validate it! route_map_name = dict_search('default_information.originate.route_map', ospfv3) if route_map_name: verify_route_map(route_map_name, ospfv3) if 'area' in ospfv3: for area, area_config in ospfv3['area'].items(): if 'area_type' in area_config: if len(area_config['area_type']) > 1: raise ConfigError(f'Can only configure one area-type for OSPFv3 area "{area}"!') if 'range' in area_config: for range, range_config in area_config['range'].items(): if {'not_advertise', 'advertise'} <= range_config.keys(): raise ConfigError(f'"not-advertise" and "advertise" for "range {range}" cannot be both configured at the same time!') if 'interface' in ospfv3: for interface, interface_config in ospfv3['interface'].items(): verify_interface_exists(interface) if 'ifmtu' in interface_config: mtu = Interface(interface).get_mtu() if int(interface_config['ifmtu']) > int(mtu): raise ConfigError(f'OSPFv3 ifmtu can not exceed physical MTU of "{mtu}"') # If interface specific options are set, we must ensure that the # interface is bound to our requesting VRF. Due to the VyOS # priorities the interface is bound to the VRF after creation of # the VRF itself, and before any routing protocol is configured. if 'vrf' in ospfv3: vrf = ospfv3['vrf'] tmp = get_interface_config(interface) if 'master' not in tmp or tmp['master'] != vrf: raise ConfigError(f'Interface {interface} is not a member of VRF {vrf}!') return None def generate(ospfv3): if not ospfv3 or 'deleted' in ospfv3: return None ospfv3['new_frr_config'] = render_to_string('frr/ospf6d.frr.j2', ospfv3) return None def apply(ospfv3): ospf6_daemon = 'ospf6d' # Save original configuration prior to starting any commit actions frr_cfg = frr.FRRConfig() # Generate empty helper string which can be ammended to FRR commands, it # will be either empty (default VRF) or contain the "vrf