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#!/usr/bin/env python3
#
# Copyright (C) 2023-2025 VyOS Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import os
from vyos.config import Config
from vyos.configdict import node_changed
from vyos import ConfigError
from vyos.vpp.interface import BridgeInterface
from vyos.vpp.utils import iftunnel_transform
def get_config(config=None) -> dict:
"""Get Bridge interface configuration
Args:
config (vyos.config.Config, optional): The VyOS configuration dictionary
Returns:
dict: Bridge interface configuration
"""
if config:
conf = config
else:
conf = Config()
base = ['vpp', 'interfaces', 'bridge']
vpp_interfaces = ['vpp', 'settings', 'interface']
ifname = os.environ['VYOS_TAGNODE_VALUE']
# Get config_dict with default values
config = conf.get_config_dict(
base + [ifname],
key_mangling=('-', '_'),
get_first_key=True,
no_tag_node_value_mangle=True,
with_defaults=True,
with_recursive_defaults=True,
)
# Get effective config as we need full dicitonary per interface delete
effective_config = conf.get_config_dict(
base + [ifname],
key_mangling=('-', '_'),
effective=True,
get_first_key=True,
no_tag_node_value_mangle=True,
)
if effective_config:
config.update({'effective': effective_config})
if not conf.exists(base + [ifname]):
config['remove'] = True
# Get global vpp interfaces for verify
config['vpp_interfaces'] = conf.get_config_dict(
vpp_interfaces,
key_mangling=('-', '_'),
get_first_key=True,
no_tag_node_value_mangle=True,
)
# determine which members have been removed
interfaces_removed = node_changed(conf, base + [ifname, 'member', 'interface'])
if interfaces_removed:
config['members_removed'] = interfaces_removed
config['ifname'] = ifname
return config
def verify(config):
if 'remove' in config:
return None
# Check if interface exists in vpp before adding to bridge-domain
allowed_prefixes = ('bond', 'gre', 'geneve', 'lo', 'vxlan')
if 'member' in config:
bvi_exists = False
for member, member_config in (
config.get('member', {}).get('interface', {}).items()
):
# Check if the interface exists in VPP settings or starts with allowed prefixes
if not (
member in config.get('vpp_interfaces', {})
or member.startswith(allowed_prefixes)
):
raise ConfigError(
f"Interface '{member}' not found in 'vpp settings interface' or does not start with allowed prefixes {allowed_prefixes}"
)
# Check if BVI is already defined, only one BVI per bridge domain is allowed
if 'bvi' in member_config:
if bvi_exists:
raise ConfigError("Only one BVI per bridge domain is allowed")
if not member.startswith('lo'):
raise ConfigError("BVI can only be defined on loopback interface")
bvi_exists = True
def generate(config):
pass
def apply(config):
ifname = config.get('ifname')
# vxlan10 in the vpp is vxlan_tunnel10
interface_transform_filter = ('geneve', 'vxlan')
# update members
if 'members_removed' in config:
i = BridgeInterface(ifname)
for member in config.get('members_removed'):
if member.startswith(interface_transform_filter):
member = iftunnel_transform(member)
if member.startswith('lo'):
# interface name in VPP is loopX
member = member.replace('lo', 'loop')
elif member.startswith('bond'):
# interface name in VPP is BondEthernetX
member = member.replace('bond', 'BondEthernet')
i.detach_member(member=member)
# Delete bridge domain
if 'effective' in config:
ifname = config.get('ifname')
i = BridgeInterface(ifname)
i.delete()
if 'remove' in config:
return None
# Add bridge domain
members = config.get('member', {}).get('interface', '')
i = BridgeInterface(ifname)
i.add()
# Add members to bridge
if members:
br = BridgeInterface(ifname)
port_type = 0
for member, member_config in members.items():
if member.startswith(interface_transform_filter):
member = iftunnel_transform(member)
if member.startswith('lo'):
# interface name in VPP is loopX
member = member.replace('lo', 'loop')
if 'bvi' in member_config:
port_type = 1
elif member.startswith('bond'):
# interface name in VPP is BondEthernetX
member = member.replace('bond', 'BondEthernet')
br.add_member(member=member, port_type=port_type)
# set default port type 0 (not BVI)
port_type = 0
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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