#!/usr/bin/env python3 # # Copyright (C) 2021 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 vyos.config import Config from vyos.configdict import dict_merge from vyos.configverify import verify_common_route_maps from vyos.configverify import verify_access_list from vyos.configverify import verify_prefix_list from vyos.util import dict_search from vyos.xml import defaults from vyos.template import render_to_string from vyos import ConfigError from vyos import frr from vyos import airbag airbag.enable() frr_daemon = 'ripngd' def get_config(config=None): if config: conf = config else: conf = Config() base = ['protocols', 'ripng'] ripng = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True) # Bail out early if configuration tree does not exist if not conf.exists(base): return ripng # We have gathered the dict representation of the CLI, but there are default # options which we need to update into the dictionary retrived. default_values = defaults(base) # merge in remaining default values ripng = dict_merge(default_values, ripng) # 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 ripng = dict_merge(tmp, ripng) return ripng def verify(ripng): if not ripng: return None verify_common_route_maps(ripng) acl_in = dict_search('distribute_list.access_list.in', ripng) if acl_in: verify_access_list(acl_in, ripng, version='6') acl_out = dict_search('distribute_list.access_list.out', ripng) if acl_out: verify_access_list(acl_out, ripng, version='6') prefix_list_in = dict_search('distribute_list.prefix_list.in', ripng) if prefix_list_in: verify_prefix_list(prefix_list_in, ripng, version='6') prefix_list_out = dict_search('distribute_list.prefix_list.out', ripng) if prefix_list_out: verify_prefix_list(prefix_list_out, ripng, version='6') if 'interface' in ripng: for interface, interface_options in ripng['interface'].items(): if 'authentication' in interface_options: if {'md5', 'plaintext_password'} <= set(interface_options['authentication']): raise ConfigError('Can not use both md5 and plaintext-password at the same time!') if 'split_horizon' in interface_options: if {'disable', 'poison_reverse'} <= set(interface_options['split_horizon']): raise ConfigError(f'You can not have "split-horizon poison-reverse" enabled ' \ f'with "split-horizon disable" for "{interface}"!') def generate(ripng): if not ripng: ripng['new_frr_config'] = '' return None ripng['new_frr_config'] = render_to_string('frr/ripng.frr.tmpl', ripng) return None def apply(ripng): # Save original configuration prior to starting any commit actions frr_cfg = frr.FRRConfig() frr_cfg.load_configuration(frr_daemon) frr_cfg.modify_section(r'key chain \S+', '') frr_cfg.modify_section(r'interface \S+', '') frr_cfg.modify_section('router ripng', '') frr_cfg.add_before(r'(ip prefix-list .*|route-map .*|line vty)', ripng['new_frr_config']) frr_cfg.commit_configuration(frr_daemon) # Save configuration to /run/frr/config/frr.conf frr.save_configuration() return None if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)