54 lines
1.7 KiB
Python
54 lines
1.7 KiB
Python
# Copyright (c) 2017 Fujitsu Limited
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
import abc
|
|
|
|
|
|
from neutron_lib.utils import runtime
|
|
from oslo_config import cfg
|
|
from oslo_log import log as logging
|
|
from oslo_utils import excutils
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
def load_and_init_conntrack_driver(*args, **kwargs):
|
|
driver = cfg.CONF.fwaas.conntrack_driver
|
|
try:
|
|
conntrack_driver_cls = runtime.load_class_by_alias_or_classname(
|
|
'neutron.agent.l3.firewall_drivers', driver)
|
|
except ImportError:
|
|
with excutils.save_and_reraise_exception():
|
|
LOG.exception("Driver '%s' not found.", driver)
|
|
conntrack_driver = conntrack_driver_cls()
|
|
conntrack_driver.initialize(*args, **kwargs)
|
|
return conntrack_driver
|
|
|
|
|
|
class ConntrackDriverBase(object, metaclass=abc.ABCMeta):
|
|
"""Base Driver for Conntrack"""
|
|
|
|
@abc.abstractmethod
|
|
def initialize(self, *args, **kwargs):
|
|
"""Initialize the driver"""
|
|
|
|
@abc.abstractmethod
|
|
def delete_entries(self, rules, namespace):
|
|
"""Delete conntrack entries specified by list of rules"""
|
|
|
|
@abc.abstractmethod
|
|
def flush_entries(self, namespace):
|
|
"""Delete all conntrack entries within namespace"""
|