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# Copyright 2020 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
# The sole purpose of this module is to hold common functions used in
# all kinds of implementations to verify the CLI configuration.
# It is started by migrating the interfaces to the new get_config_dict()
# approach which will lead to a lot of code that can be reused.
# NOTE: imports should be as local as possible to the function which
# makes use of it!
from vyos import ConfigError
def verify_bridge_vrf(config):
"""
Common helper function used by interface implementations to
perform recurring validation of VRF configuration
"""
from netifaces import interfaces
if 'vrf' in config.keys():
if config['vrf'] not in interfaces():
raise ConfigError('VRF "{vrf}" does not exist'.format(**config))
if 'is_bridge_member' in config.keys():
raise ConfigError(
'Interface "{ifname}" cannot be both a member of VRF "{vrf}" '
'and bridge "{is_bridge_member}"!'.format(**config))
def verify_bridge_address(config):
"""
Common helper function used by interface implementations to
perform recurring validation of IP address assignmenr
when interface also is part of a bridge.
"""
if {'is_bridge_member', 'address'} <= set(config):
raise ConfigError(
f'Cannot assign address to interface "{ifname}" as it is a '
f'member of bridge "{is_bridge_member}"!'.format(**config))
def verify_bridge_delete(config):
"""
Common helper function used by interface implementations to
perform recurring validation of IP address assignmenr
when interface also is part of a bridge.
"""
if 'is_bridge_member' in config.keys():
raise ConfigError(
'Interface "{ifname}" cannot be deleted as it is a '
'member of bridge "{is_bridge_member}"!'.format(**config))
def verify_source_interface(config):
"""
Common helper function used by interface implementations to
perform recurring validation of the existence of a source-interface
required by e.g. peth/MACvlan, MACsec ...
"""
from netifaces import interfaces
if not 'source_interface' in config.keys():
raise ConfigError('Physical source-interface required for '
'interface "{ifname}"'.format(**config))
if not config['source_interface'] in interfaces():
raise ConfigError(f'Source interface {source_interface} does not '
f'exist'.format(**config))

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