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#!/usr/bin/env python3
#
# Copyright (C) 2023 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/>.
from sys import argv
from sys import exit
from vyos.config import Config
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()
vrf_name = None
if len(argv) > 1:
vrf_name = argv[1]
base = ['vrf', 'name', vrf_name]
tmp = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=False)
if not tmp:
return None
vrf = { 'name' : conf.get_config_dict(base, key_mangling=('-', '_'),
get_first_key=False) }
return vrf
def verify(vrf):
if not vrf:
return
if len(argv) < 2:
raise ConfigError('VRF parameter not specified when valling vrf_vni.py')
return None
def generate(vrf):
if not vrf:
return
vrf['new_frr_config'] = render_to_string('frr/zebra.vrf.route-map.frr.j2', vrf)
return None
def apply(vrf):
frr_daemon = 'zebra'
# add configuration to FRR
frr_cfg = frr.FRRConfig()
frr_cfg.load_configuration(frr_daemon)
# There is only one VRF inside the dict as we read only one in get_config()
if vrf and 'name' in vrf:
vrf_name = next(iter(vrf['name']))
frr_cfg.modify_section(f'^vrf {vrf_name}', stop_pattern='^exit-vrf', remove_stop_mark=True)
if vrf and 'new_frr_config' in vrf:
frr_cfg.add_before(frr.default_add_before, vrf['new_frr_config'])
frr_cfg.commit_configuration(frr_daemon)
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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