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#!/usr/bin/env python3
#
# Copyright (C) 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.
from vyos.config import Config
from vyos import ConfigError
from vyos.configdict import get_interface_dict
from vyos.utils.process import is_systemd_service_active
from vyos.ifconfig.vpp import VPPXconnectInterface
from vyos.vpp.config_deps import deps_bond_dict
from vyos.vpp.config_deps import deps_bridge_dict
from vyos.vpp.config_deps import deps_xconnect_dict
from vyos.vpp.config_verify import verify_member_conflicts
from vyos.vpp.config_verify import verify_vpp_interface_not_in_feature
from vyos.vpp.utils import cli_ifaces_list
def get_config(config=None) -> dict:
"""Get Xconnect 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 = ['interfaces', 'vpp', 'xconnect']
ifname, config = get_interface_dict(conf, base)
if not conf.exists(['vpp']) and not conf.exists(base):
config['remove_vpp'] = True
return config
# Get effective config as we need full dictionary 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})
config['bond_members'] = deps_bond_dict(conf)
config['bridge_members'] = deps_bridge_dict(conf)
config['xconn_members'] = deps_xconnect_dict(conf)
config['vpp_ifaces'] = cli_ifaces_list(conf, 'candidate')
# VPP config for member-in-feature checks
config['vpp'] = conf.get_config_dict(
['vpp'],
key_mangling=('-', '_'),
get_first_key=True,
no_tag_node_value_mangle=True,
)
return config
def verify(config):
if 'deleted' in config or 'remove_vpp' in config:
return None
if not is_systemd_service_active('vpp.service'):
raise ConfigError(
'Cannot configure layer 2 cross-connect: vpp.service is not running'
)
# Xconnect requires 2 members
if len(config.get('member', {}).get('interface')) != 2:
raise ConfigError('Cross connect requires 2 members')
not_allowed_prefixes = ('vppbond', 'vppbr', 'vpplo')
for iface in config.get('member', {}).get('interface', []):
# Ensure the interface is allowed as xconnect member
if iface.startswith(not_allowed_prefixes):
raise ConfigError(f'{iface} cannot be configured as xconnect member')
# Member must belong to VPP
if iface not in config['vpp_ifaces']:
raise ConfigError(f'{iface} must be a VPP interface for xconnect')
# Each interface can belong only to one xconnect
xconn_members = config['xconn_members'][iface]
if len(xconn_members) > 1:
raise ConfigError(
f'Interface {iface} added to more than one xconnect: {", ".join(xconn_members)}'
)
verify_member_conflicts(iface, config, 'xconn')
verify_vpp_interface_not_in_feature(iface, config.get('vpp'))
def generate(config):
pass
def apply(config):
if 'remove_vpp' in config:
return None
ifname = config.get('ifname')
xconnect = VPPXconnectInterface(ifname)
# Delete xconnect
if 'effective' in config:
remove_config = config.get('effective')
members = remove_config['member']['interface']
xconnect.remove(members)
if 'deleted' in config:
return None
# Add xconnect
xconnect.update(config)
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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