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#!/usr/bin/env python3
#
# Copyright (C) 2019-2020 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 netifaces import interfaces
from sys import exit
from vyos.config import Config
from vyos.ifconfig import DummyIf
from vyos.validate import is_member
from vyos import ConfigError, airbag
airbag.enable()
def get_config():
""" Retrive CLI config as dictionary. Dictionary can never be empty,
as at least the interface name will be added or a deleted flag """
conf = Config()
# determine tagNode instance
if 'VYOS_TAGNODE_VALUE' not in os.environ:
raise ConfigError('Interface (VYOS_TAGNODE_VALUE) not specified')
ifname = os.environ['VYOS_TAGNODE_VALUE']
base = ['interfaces', 'dummy', ifname]
dummy = conf.get_config_dict(base, key_mangling=('-', '_'))
# store interface instance name in dictionary
dummy.update({'ifname': ifname})
# check if we are a member of any bridge
bridge = is_member(conf, ifname, 'bridge')
if bridge:
tmp = {'is_bridge_member' : bridge}
dummy.update(tmp)
# Check if interface has been removed
tmp = {'deleted' : not conf.exists(base)}
dummy.update(tmp)
return dummy
def verify(dummy):
if dummy['deleted']:
if 'is_bridge_member' in dummy.keys():
raise ConfigError(
'Interface "{ifname}" cannot be deleted as it is a '
'member of bridge "{is_bridge_member}"!'.format(**dummy))
return None
if 'vrf' in dummy.keys():
if dummy['vrf'] not in interfaces():
raise ConfigError('VRF "{vrf}" does not exist'.format(**dummy))
if 'is_bridge_member' in dummy.keys():
raise ConfigError(
'Interface "{ifname}" cannot be both a member of VRF "{vrf}" '
'and bridge "{is_bridge_member}"!'.format(**dummy))
# check if both keys are part of the dictionary
if {'is_bridge_member', 'address'} <= set(dummy):
raise ConfigError(
f'Cannot assign address to interface "{ifname}" as it is a '
f'member of bridge "{is_bridge_member}"!'.format(**dummy))
return None
def generate(dummy):
return None
def apply(dummy):
d = DummyIf(dummy['ifname'])
# Remove dummy interface
if dummy['deleted']:
d.remove()
else:
d.update(dummy)
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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