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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_vrf(config):
"""
Common helper function used by interface implementations to perform
recurring validation of VRF configuration.
"""
from netifaces import interfaces
if 'vrf' in config:
if config['vrf'] not in interfaces():
raise ConfigError('VRF "{vrf}" does not exist'.format(**config))
if 'is_bridge_member' in config:
raise ConfigError(
'Interface "{ifname}" cannot be both a member of VRF "{vrf}" '
'and bridge "{is_bridge_member}"!'.format(**config))
def verify_address(config):
"""
Common helper function used by interface implementations to perform
recurring validation of IP address assignment when interface is part
of a bridge or bond.
"""
if {'is_bridge_member', 'address'} <= set(config):
raise ConfigError(
'Cannot assign address to interface "{ifname}" as it is a '
'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:
raise ConfigError(
'Interface "{ifname}" cannot be deleted as it is a '
'member of bridge "{is_bridge_member}"!'.format(**config))
def verify_interface_exists(config):
"""
Common helper function used by interface implementations to perform
recurring validation if an interface actually exists.
"""
from netifaces import interfaces
if not config['ifname'] in interfaces():
raise ConfigError('Interface "{ifname}" does not exist!'
.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 'source_interface' not in config:
raise ConfigError('Physical source-interface required for '
'interface "{ifname}"'.format(**config))
if config['source_interface'] not in interfaces():
raise ConfigError('Specified source-interface {source_interface} does '
'not exist'.format(**config))
if 'source_interface_is_bridge_member' in config:
raise ConfigError('Invalid source-interface {source_interface}. Interface '
'is already a member of bridge '
'{source_interface_is_bridge_member}'.format(**config))
if 'source_interface_is_bond_member' in config:
raise ConfigError('Invalid source-interface {source_interface}. Interface '
'is already a member of bond '
'{source_interface_is_bond_member}'.format(**config))
def verify_dhcpv6(config):
"""
Common helper function used by interface implementations to perform
recurring validation of DHCPv6 options which are mutually exclusive.
"""
if 'dhcpv6_options' in config:
from vyos.util import vyos_dict_search
if {'parameters_only', 'temporary'} <= set(config['dhcpv6_options']):
raise ConfigError('DHCPv6 temporary and parameters-only options '
'are mutually exclusive!')
# It is not allowed to have duplicate SLA-IDs as those identify an
# assigned IPv6 subnet from a delegated prefix
for pd in vyos_dict_search('dhcpv6_options.pd', config):
sla_ids = []
for interface in vyos_dict_search(f'dhcpv6_options.pd.{pd}.interface', config):
sla_id = vyos_dict_search(
f'dhcpv6_options.pd.{pd}.interface.{interface}.sla_id', config)
sla_ids.append(sla_id)
# Check for duplicates
duplicates = [x for n, x in enumerate(sla_ids) if x in sla_ids[:n]]
if duplicates:
raise ConfigError('Site-Level Aggregation Identifier (SLA-ID) '
'must be unique per prefix-delegation!')
def verify_vlan_config(config):
"""
Common helper function used by interface implementations to perform
recurring validation of interface VLANs
"""
# 802.1q VLANs
for vlan in config.get('vif', {}):
vlan = config['vif'][vlan]
verify_dhcpv6(vlan)
verify_address(vlan)
verify_vrf(vlan)
# 802.1ad (Q-in-Q) VLANs
for vlan in config.get('vif_s', {}):
vlan = config['vif_s'][vlan]
verify_dhcpv6(vlan)
verify_address(vlan)
verify_vrf(vlan)
for vlan in config.get('vif_s', {}).get('vif_c', {}):
vlan = config['vif_c'][vlan]
verify_dhcpv6(vlan)
verify_address(vlan)
verify_vrf(vlan)
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