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#!/usr/bin/env python3
#
# Copyright (C) 2020-2024 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 ipaddress import IPv4Network
from signal import SIGTERM
from sys import exit
from vyos.config import Config
from vyos.configdict import get_frrender_dict
from vyos.configverify import verify_interface_exists
from vyos.configverify import has_frr_protocol_in_dict
from vyos.frrender import FRRender
from vyos.frrender import pim_daemon
from vyos.utils.process import process_named_running
from vyos.utils.process import call
from vyos import ConfigError
from vyos import airbag
airbag.enable()
def get_config(config=None):
if config:
conf = config
else:
conf = Config()
return get_frrender_dict(conf)
def verify(config_dict):
if not has_frr_protocol_in_dict(config_dict, 'pim'):
return None
pim = config_dict['pim']
if 'deleted' in pim:
return None
if 'igmp_proxy_enabled' in pim:
raise ConfigError('IGMP proxy and PIM cannot be configured at the same time!')
if 'interface' not in pim:
raise ConfigError('PIM require defined interfaces!')
RESERVED_MC_NET = '224.0.0.0/24'
for interface, interface_config in pim['interface'].items():
verify_interface_exists(pim, interface)
# Check join group in reserved net
if 'igmp' in interface_config and 'join' in interface_config['igmp']:
for join_addr in interface_config['igmp']['join']:
if IPv4Address(join_addr) in IPv4Network(RESERVED_MC_NET):
raise ConfigError(f'Groups within {RESERVED_MC_NET} are reserved and cannot be joined!')
if 'rp' in pim:
if 'address' not in pim['rp']:
raise ConfigError('PIM rendezvous point needs to be defined!')
# Check unique multicast groups
unique = []
pim_base_error = 'PIM rendezvous point group'
for address, address_config in pim['rp']['address'].items():
if 'group' not in address_config:
raise ConfigError(f'{pim_base_error} should be defined for "{address}"!')
# Check if it is a multicast group
for gr_addr in address_config['group']:
if not IPv4Network(gr_addr).is_multicast:
raise ConfigError(f'{pim_base_error} "{gr_addr}" is not a multicast group!')
if gr_addr in unique:
raise ConfigError(f'{pim_base_error} must be unique!')
unique.append(gr_addr)
def generate(config_dict):
if 'frrender_cls' not in config_dict:
FRRender().generate(config_dict)
return None
def apply(config_dict):
if not has_frr_protocol_in_dict(config_dict, 'pim'):
return None
pim_pid = process_named_running(pim_daemon)
pim = config_dict['pim']
if 'deleted' in pim:
os.kill(int(pim_pid), SIGTERM)
return None
if not pim_pid:
call('/usr/lib/frr/pimd -d -F traditional --daemon -A 127.0.0.1')
if 'frrender_cls' not in config_dict:
FRRender().apply()
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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