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#!/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 <http://www.gnu.org/licenses/>.
import os
from ipaddress import IPv4Address
from sys import exit
from vyos import ConfigError
from vyos.config import Config
from vyos.util import call
from vyos.template import render
config_file = r'/tmp/static_mcast.frr'
# Get configuration for static multicast route
def get_config():
conf = Config()
mroute = {
'old_mroute' : {},
'mroute' : {}
}
base_path = "protocols static multicast"
if not (conf.exists(base_path) or conf.exists_effective(base_path)):
return None
conf.set_level(base_path)
# Get multicast effective routes
for route in conf.list_effective_nodes('route'):
mroute['old_mroute'][route] = {}
for next_hop in conf.list_effective_nodes('route {0} next-hop'.format(route)):
mroute['old_mroute'][route].update({
next_hop : conf.return_value('route {0} next-hop {1} distance'.format(route, next_hop))
})
# Get multicast effective interface-routes
for route in conf.list_effective_nodes('interface-route'):
if not route in mroute['old_mroute']:
mroute['old_mroute'][route] = {}
for next_hop in conf.list_effective_nodes('interface-route {0} next-hop-interface'.format(route)):
mroute['old_mroute'][route].update({
next_hop : conf.return_value('interface-route {0} next-hop-interface {1} distance'.format(route, next_hop))
})
# Get multicast routes
for route in conf.list_nodes('route'):
mroute['mroute'][route] = {}
for next_hop in conf.list_nodes('route {0} next-hop'.format(route)):
mroute['mroute'][route].update({
next_hop : conf.return_value('route {0} next-hop {1} distance'.format(route, next_hop))
})
# Get multicast interface-routes
for route in conf.list_nodes('interface-route'):
if not route in mroute['mroute']:
mroute['mroute'][route] = {}
for next_hop in conf.list_nodes('interface-route {0} next-hop-interface'.format(route)):
mroute['mroute'][route].update({
next_hop : conf.return_value('interface-route {0} next-hop-interface {1} distance'.format(route, next_hop))
})
return mroute
def verify(mroute):
if mroute is None:
return None
for route in mroute['mroute']:
route = route.split('/')
if IPv4Address(route[0]) < IPv4Address('224.0.0.0'):
raise ConfigError(route + " not a multicast network")
def generate(mroute):
if mroute is None:
return None
render(config_file, 'frr/static_mcast.frr.tmpl', mroute)
return None
def apply(mroute):
if mroute is None:
return None
if os.path.exists(config_file):
call("sudo vtysh -d staticd -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)
exit(1)
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