#!/usr/bin/env python3 # # Copyright (C) 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 . # import sys import jinja2 import copy import os import vyos.validate from vyos import ConfigError from vyos.config import Config from ipaddress import IPv4Address config_file = r'/tmp/igmp.frr' # Please be careful if you edit the template. config_tmpl = """ ! {% for iface in old_ifaces -%} interface {{ iface }} {% for group in old_ifaces[iface].gr_join -%} {% if old_ifaces[iface].gr_join[group] -%} {% for source in old_ifaces[iface].gr_join[group] -%} no ip igmp join {{ group }} {{ source }} {% endfor -%} {% else -%} no ip igmp join {{ group }} {% endif -%} {% endfor -%} no ip igmp ! {% endfor -%} {% for iface in ifaces -%} interface {{ iface }} {% if ifaces[iface].version -%} ip igmp version {{ ifaces[iface].version }} {% else -%} {# IGMP default version 3 #} ip igmp {% endif -%} {% if ifaces[iface].query_interval -%} ip igmp query-interval {{ ifaces[iface].query_interval }} {% endif -%} {% if ifaces[iface].query_max_resp_time -%} ip igmp query-max-response-time {{ ifaces[iface].query_max_resp_time }} {% endif -%} {% for group in ifaces[iface].gr_join -%} {% if ifaces[iface].gr_join[group] -%} {% for source in ifaces[iface].gr_join[group] -%} ip igmp join {{ group }} {{ source }} {% endfor -%} {% else -%} ip igmp join {{ group }} {% endif -%} {% endfor -%} ! {% endfor -%} ! """ def get_config(): conf = Config() igmp_conf = { 'igmp_conf' : False, 'old_ifaces' : {}, 'ifaces' : {} } if not (conf.exists('protocols igmp') or conf.exists_effective('protocols igmp')): return None if conf.exists('protocols igmp'): igmp_conf['igmp_conf'] = True conf.set_level('protocols igmp') # # Get interfaces for iface in conf.list_effective_nodes('interface'): igmp_conf['old_ifaces'].update({ iface : { 'version' : conf.return_effective_value('interface {0} version'.format(iface)), 'query_interval' : conf.return_effective_value('interface {0} query-interval'.format(iface)), 'query_max_resp_time' : conf.return_effective_value('interface {0} query-max-response-time'.format(iface)), 'gr_join' : {} } }) for gr_join in conf.list_effective_nodes('interface {0} join'.format(iface)): igmp_conf['old_ifaces'][iface]['gr_join'][gr_join] = conf.return_effective_values('interface {0} join {1} source'.format(iface, gr_join)) for iface in conf.list_nodes('interface'): igmp_conf['ifaces'].update({ iface : { 'version' : conf.return_value('interface {0} version'.format(iface)), 'query_interval' : conf.return_value('interface {0} query-interval'.format(iface)), 'query_max_resp_time' : conf.return_value('interface {0} query-max-response-time'.format(iface)), 'gr_join' : {} } }) for gr_join in conf.list_nodes('interface {0} join'.format(iface)): igmp_conf['ifaces'][iface]['gr_join'][gr_join] = conf.return_values('interface {0} join {1} source'.format(iface, gr_join)) return igmp_conf def verify(igmp): if igmp is None: return None if igmp['igmp_conf']: # Check interfaces if not igmp['ifaces']: raise ConfigError(f"IGMP require defined interfaces!") # Check, is this multicast group for intfc in igmp['ifaces']: for gr_addr in igmp['ifaces'][intfc]['gr_join']: if IPv4Address(gr_addr) < IPv4Address('224.0.0.0'): raise ConfigError(gr_addr + " not a multicast group") def generate(igmp): if igmp is None: return None tmpl = jinja2.Template(config_tmpl) config_text = tmpl.render(igmp) with open(config_file, 'w') as f: f.write(config_text) return None def apply(igmp): if igmp is None: return None if os.path.exists(config_file): os.system("sudo vtysh -d pimd -f " + config_file) os.remove(config_file) return None if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) sys.exit(1)