#!/usr/bin/env python3 # # Copyright (C) 2018-2020 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 netifaces import interfaces from vyos.base import Warning from vyos.config import Config from vyos.configdict import dict_merge from vyos.template import render from vyos.util import call from vyos.util import dict_search from vyos.xml import defaults from vyos import ConfigError from vyos import airbag airbag.enable() config_file = r'/etc/igmpproxy.conf' def get_config(config=None): if config: conf = config else: conf = Config() base = ['protocols', 'igmp-proxy'] igmp_proxy = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True) if 'interface' in igmp_proxy: # T2665: we must add the tagNode defaults individually until this is # moved to the base class default_values = defaults(base + ['interface']) for interface in igmp_proxy['interface']: igmp_proxy['interface'][interface] = dict_merge(default_values, igmp_proxy['interface'][interface]) if conf.exists(['protocols', 'igmp']): igmp_proxy.update({'igmp_configured': ''}) if conf.exists(['protocols', 'pim']): igmp_proxy.update({'pim_configured': ''}) return igmp_proxy def verify(igmp_proxy): # bail out early - looks like removal from running config if not igmp_proxy or 'disable' in igmp_proxy: return None if 'igmp_configured' in igmp_proxy or 'pim_configured' in igmp_proxy: raise ConfigError('Can not configure both IGMP proxy and PIM '\ 'at the same time') # at least two interfaces are required, one upstream and one downstream if 'interface' not in igmp_proxy or len(igmp_proxy['interface']) < 2: raise ConfigError('Must define exactly one upstream and at least one ' \ 'downstream interface!') upstream = 0 for interface, config in igmp_proxy['interface'].items(): if interface not in interfaces(): raise ConfigError(f'Interface "{interface}" does not exist') if dict_search('role', config) == 'upstream': upstream += 1 if upstream == 0: raise ConfigError('At least 1 upstream interface is required!') elif upstream > 1: raise ConfigError('Only 1 upstream interface allowed!') return None def generate(igmp_proxy): # bail out early - looks like removal from running config if not igmp_proxy: return None # bail out early - service is disabled, but inform user if 'disable' in igmp_proxy: Warning('IGMP Proxy will be deactivated because it is disabled') return None render(config_file, 'igmp-proxy/igmpproxy.conf.j2', igmp_proxy) return None def apply(igmp_proxy): if not igmp_proxy or 'disable' in igmp_proxy: # IGMP Proxy support is removed in the commit call('systemctl stop igmpproxy.service') if os.path.exists(config_file): os.unlink(config_file) else: call('systemctl restart igmpproxy.service') return None if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)