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#!/usr/bin/env python3
#
# Copyright (C) 2019 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 sys
import copy
import vyos.validate
from vyos import ConfigError
from vyos.config import Config
default_config_data = {
'peers': []
}
def get_config():
bfd = copy.deepcopy(default_config_data)
conf = Config()
if not conf.exists('protocols bfd'):
return None
else:
conf.set_level('protocols bfd')
for peer in conf.list_nodes('peer'):
conf.set_level('protocols bfd peer {0}'.format(peer))
bfd_peer = {
'remote': peer,
'shutdown': False,
'local-interface': '',
'local-address': '',
}
# Check if individual peer is disabled
if conf.exists('shutdown'):
bfd_peer['shutdown'] = True
# Check if peer has a local source interface configured
if conf.exists('local-interface'):
bfd_peer['local-interface'] = conf.return_value('local-interface')
# Check if peer has a local source address configured - this is mandatory for IPv6
if conf.exists('local-address'):
bfd_peer['local-address'] = conf.return_value('local-address')
bfd['peers'].append(bfd_peer)
return bfd
def verify(bfd):
if bfd is None:
return None
for peer in bfd['peers']:
# Bail out early if peer is shutdown
if peer['shutdown']:
continue
# IPv6 peers require an explicit local address/interface combination
if vyos.validate.is_ipv6(peer['remote']):
if not (peer['local-interface'] and peer['local-address']):
raise ConfigError("BFD IPv6 peers require explicit local address/interface setting")
return None
def generate(bfd):
if bfd is None:
return None
return None
def apply(bfd):
if bfd is None:
return None
print(bfd)
return None
if __name__ == '__main__':
try:
c = get_config()
verify(c)
generate(c)
apply(c)
except ConfigError as e:
print(e)
sys.exit(1)
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