#!/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.configdict import node_changed 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() def get_config(config=None): if config: conf = config else: conf = Config() base = ['protocols', 'rip'] rip = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True) # 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: rip['interface_removed'] = list(interfaces_removed) # Bail out early if configuration tree does not exist if not conf.exists(base): rip.update({'deleted' : ''}) return rip # 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 rip = dict_merge(default_values, rip) # 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 rip = dict_merge(tmp, rip) return rip def verify(rip): if not rip: return None verify_common_route_maps(rip) acl_in = dict_search('distribute_list.access_list.in', rip) if acl_in: verify_access_list(acl_in, rip) acl_out = dict_search('distribute_list.access_list.out', rip) if acl_out: verify_access_list(acl_out, rip) prefix_list_in = dict_search('distribute_list.prefix-list.in', rip) if prefix_list_in: verify_prefix_list(prefix_list_in, rip) prefix_list_out = dict_search('distribute_list.prefix_list.out', rip) if prefix_list_out: verify_prefix_list(prefix_list_out, rip) if 'interface' in rip: for interface, interface_options in rip['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(rip): if not rip or 'deleted' in rip: return None rip['new_frr_config'] = render_to_string('frr/ripd.frr.tmpl', rip) return None def apply(rip): rip_daemon = 'ripd' zebra_daemon = 'zebra' # Save original configuration prior to starting any commit actions frr_cfg = frr.FRRConfig() # The route-map used for the FIB (zebra) is part of the zebra daemon frr_cfg.load_configuration(zebra_daemon) frr_cfg.modify_section('^ip protocol rip route-map [-a-zA-Z0-9.]+', stop_pattern='(\s|!)') frr_cfg.commit_configuration(zebra_daemon) frr_cfg.load_configuration(rip_daemon) frr_cfg.modify_section('^key chain \S+', stop_pattern='^exit', remove_stop_mark=True) frr_cfg.modify_section('^router rip', stop_pattern='^exit', remove_stop_mark=True) for key in ['interface', 'interface_removed']: if key not in rip: continue for interface in rip[key]: frr_cfg.modify_section(f'^interface {interface}', stop_pattern='^exit', remove_stop_mark=True) if 'new_frr_config' in rip: frr_cfg.add_before(frr.default_add_before, rip['new_frr_config']) frr_cfg.commit_configuration(rip_daemon) return None if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)