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Diffstat (limited to 'src/conf_mode/interfaces_bridge.py')
| -rw-r--r-- | src/conf_mode/interfaces_bridge.py | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/src/conf_mode/interfaces_bridge.py b/src/conf_mode/interfaces_bridge.py new file mode 100644 index 0000000..637db44 --- /dev/null +++ b/src/conf_mode/interfaces_bridge.py @@ -0,0 +1,219 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2019-2024 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 exit + +from vyos.config import Config +from vyos.configdict import get_interface_dict +from vyos.configdict import node_changed +from vyos.configdict import is_member +from vyos.configdict import is_source_interface +from vyos.configdict import has_vlan_subinterface_configured +from vyos.configverify import verify_dhcpv6 +from vyos.configverify import verify_mirror_redirect +from vyos.configverify import verify_vrf +from vyos.ifconfig import BridgeIf +from vyos.configdict import has_address_configured +from vyos.configdict import has_vrf_configured +from vyos.configdep import set_dependents +from vyos.configdep import call_dependents +from vyos.utils.dict import dict_search +from vyos.utils.network import interface_exists +from vyos import ConfigError + +from vyos import airbag +airbag.enable() + +def get_config(config=None): + """ + Retrive CLI config as dictionary. Dictionary can never be empty, as at least the + interface name will be added or a deleted flag + """ + if config: + conf = config + else: + conf = Config() + base = ['interfaces', 'bridge'] + ifname, bridge = get_interface_dict(conf, base) + + # determine which members have been removed + tmp = node_changed(conf, base + [ifname, 'member', 'interface']) + if tmp: + if 'member' in bridge: + bridge['member'].update({'interface_remove': {t: {} for t in tmp}}) + else: + bridge.update({'member': {'interface_remove': {t: {} for t in tmp}}}) + for interface in tmp: + # When using VXLAN member interfaces that are configured for Single + # VXLAN Device (SVD) we need to call the VXLAN conf-mode script to + # re-create VLAN to VNI mappings if required, but only if the interface + # is already live on the system - this must not be done on first commit + if interface.startswith('vxlan') and interface_exists(interface): + set_dependents('vxlan', conf, interface) + _, vxlan = get_interface_dict(conf, ['interfaces', 'vxlan'], ifname=interface) + bridge['member']['interface_remove'].update({interface: vxlan}) + # When using Wireless member interfaces we need to inform hostapd + # to properly set-up the bridge + elif interface.startswith('wlan') and interface_exists(interface): + set_dependents('wlan', conf, interface) + + if dict_search('member.interface', bridge) is not None: + for interface in list(bridge['member']['interface']): + # Check if member interface is already member of another bridge + tmp = is_member(conf, interface, 'bridge') + if tmp and bridge['ifname'] not in tmp: + bridge['member']['interface'][interface].update({'is_bridge_member' : tmp}) + + # Check if member interface is already member of a bond + tmp = is_member(conf, interface, 'bonding') + if tmp: bridge['member']['interface'][interface].update({'is_bond_member' : tmp}) + + # Check if member interface is used as source-interface on another interface + tmp = is_source_interface(conf, interface) + if tmp: bridge['member']['interface'][interface].update({'is_source_interface' : tmp}) + + # Bridge members must not have an assigned address + tmp = has_address_configured(conf, interface) + if tmp: bridge['member']['interface'][interface].update({'has_address' : ''}) + + # Bridge members must not have a VRF attached + tmp = has_vrf_configured(conf, interface) + if tmp: bridge['member']['interface'][interface].update({'has_vrf' : ''}) + + # VLAN-aware bridge members must not have VLAN interface configuration + tmp = has_vlan_subinterface_configured(conf,interface) + if 'enable_vlan' in bridge and tmp: + bridge['member']['interface'][interface].update({'has_vlan' : ''}) + + # When using VXLAN member interfaces that are configured for Single + # VXLAN Device (SVD) we need to call the VXLAN conf-mode script to + # re-create VLAN to VNI mappings if required, but only if the interface + # is already live on the system - this must not be done on first commit + if interface.startswith('vxlan') and interface_exists(interface): + set_dependents('vxlan', conf, interface) + # When using Wireless member interfaces we need to inform hostapd + # to properly set-up the bridge + elif interface.startswith('wlan') and interface_exists(interface): + set_dependents('wlan', conf, interface) + + # delete empty dictionary keys - no need to run code paths if nothing is there to do + if 'member' in bridge: + if 'interface' in bridge['member'] and len(bridge['member']['interface']) == 0: + del bridge['member']['interface'] + + if len(bridge['member']) == 0: + del bridge['member'] + + return bridge + +def verify(bridge): + # to delete interface or remove a member interface VXLAN first need to check if + # VXLAN does not require to be a member of a bridge interface + if dict_search('member.interface_remove', bridge): + for iface, iface_config in bridge['member']['interface_remove'].items(): + if iface.startswith('vxlan') and dict_search('parameters.neighbor_suppress', iface_config) != None: + raise ConfigError( + f'To detach interface {iface} from bridge you must first ' + f'disable "neighbor-suppress" parameter in the VXLAN interface {iface}' + ) + + if 'deleted' in bridge: + return None + + verify_dhcpv6(bridge) + verify_vrf(bridge) + verify_mirror_redirect(bridge) + + ifname = bridge['ifname'] + + if dict_search('member.interface', bridge): + for interface, interface_config in bridge['member']['interface'].items(): + error_msg = f'Can not add interface "{interface}" to bridge, ' + + if interface == 'lo': + raise ConfigError('Loopback interface "lo" can not be added to a bridge') + + if 'is_bridge_member' in interface_config: + tmp = next(iter(interface_config['is_bridge_member'])) + raise ConfigError(error_msg + f'it is already a member of bridge "{tmp}"!') + + if 'is_bond_member' in interface_config: + tmp = next(iter(interface_config['is_bond_member'])) + raise ConfigError(error_msg + f'it is already a member of bond "{tmp}"!') + + if 'is_source_interface' in interface_config: + tmp = interface_config['is_source_interface'] + raise ConfigError(error_msg + f'it is the source-interface of "{tmp}"!') + + if 'has_address' in interface_config: + raise ConfigError(error_msg + 'it has an address assigned!') + + if 'has_vrf' in interface_config: + raise ConfigError(error_msg + 'it has a VRF assigned!') + + if 'enable_vlan' in bridge: + if 'has_vlan' in interface_config: + raise ConfigError(error_msg + 'it has VLAN subinterface(s) assigned!') + else: + for option in ['allowed_vlan', 'native_vlan']: + if option in interface_config: + raise ConfigError('Can not use VLAN options on non VLAN aware bridge') + + if 'enable_vlan' in bridge: + if dict_search('vif.1', bridge): + raise ConfigError(f'VLAN 1 sub interface cannot be set for VLAN aware bridge {ifname}, and VLAN 1 is always the parent interface') + else: + if dict_search('vif', bridge): + raise ConfigError(f'You must first activate "enable-vlan" of {ifname} bridge to use "vif"') + + return None + +def generate(bridge): + return None + +def apply(bridge): + br = BridgeIf(bridge['ifname']) + if 'deleted' in bridge: + # delete interface + br.remove() + else: + br.update(bridge) + + tmp = [] + if 'member' in bridge: + if 'interface_remove' in bridge['member']: + tmp.extend(bridge['member']['interface_remove']) + if 'interface' in bridge['member']: + tmp.extend(bridge['member']['interface']) + + for interface in tmp: + if interface.startswith(tuple(['vxlan', 'wlan'])) and interface_exists(interface): + try: + call_dependents() + except ConfigError: + raise ConfigError(f'Error updating member interface {interface} configuration after changing bridge!') + + return None + +if __name__ == '__main__': + try: + c = get_config() + verify(c) + generate(c) + apply(c) + except ConfigError as e: + print(e) + exit(1) |