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# Copyright 2015 Futurewei. 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 six
from oslo_log import helpers as log_helpers
from oslo_log import log as logging
from oslo_utils import uuidutils
import sqlalchemy as sa
from sqlalchemy import orm
from sqlalchemy.orm.collections import attribute_mapped_collection
from sqlalchemy.orm import exc
from neutron.common import constants as const
from neutron.db import common_db_mixin
from neutron.db import model_base
from neutron.db import models_v2
from neutron.i18n import _LI
from networking_sfc.extensions import flowclassifier as fc_ext
LOG = logging.getLogger(__name__)
class L7Parameter(model_base.BASEV2):
"""Represents a L7 parameter."""
__tablename__ = 'sfc_flow_classifier_l7_parameters'
keyword = sa.Column(sa.String(255), primary_key=True)
value = sa.Column(sa.String(255))
classifier_id = sa.Column(
sa.String(36),
sa.ForeignKey('sfc_flow_classifiers.id', ondelete='CASCADE'),
primary_key=True)
class FlowClassifier(model_base.BASEV2, models_v2.HasId,
models_v2.HasTenant):
"""Represents a v2 neutron flow classifier."""
__tablename__ = 'sfc_flow_classifiers'
name = sa.Column(sa.String(255))
ethertype = sa.Column(sa.String(40))
protocol = sa.Column(sa.String(40))
description = sa.Column(sa.String(255))
source_port_range_min = sa.Column(sa.Integer)
source_port_range_max = sa.Column(sa.Integer)
destination_port_range_min = sa.Column(sa.Integer)
destination_port_range_max = sa.Column(sa.Integer)
source_ip_prefix = sa.Column(sa.String(255))
destination_ip_prefix = sa.Column(sa.String(255))
l7_parameters = orm.relationship(
L7Parameter,
collection_class=attribute_mapped_collection('keyword'),
cascade='all, delete-orphan')
class FlowClassifierDbPlugin(fc_ext.FlowClassifierPluginBase,
common_db_mixin.CommonDbMixin):
def _check_port_range_valid(self, port_range_min,
port_range_max,
protocol):
if (
port_range_min is not None and
port_range_max is not None and
port_range_min > port_range_max
):
raise fc_ext.FlowClassifierInvalidPortRange(
port_range_min=port_range_min,
port_range_max=port_range_max
)
if port_range_min is not None or port_range_max is not None:
if protocol not in [const.PROTO_NAME_TCP, const.PROTO_NAME_UDP]:
raise fc_ext.FlowClassifierProtocolRequiredWithPorts()
def _get_fixed_ip_from_port(self, context, logical_port, ip_prefix):
if logical_port is not None:
self._get_port(context, logical_port)
return ip_prefix
@log_helpers.log_method_call
def create_flow_classifier(self, context, flow_classifier):
fc = flow_classifier['flow_classifier']
tenant_id = self._get_tenant_id_for_create(context, fc)
l7_parameters = {
key: L7Parameter(key, val)
for key, val in six.iteritems(fc['l7_parameters'])}
source_port_range_min = fc['source_port_range_min']
source_port_range_max = fc['source_port_range_max']
self._check_port_range_valid(source_port_range_min,
source_port_range_max,
fc['protocol'])
destination_port_range_min = fc['destination_port_range_min']
destination_port_range_max = fc['destination_port_range_max']
self._check_port_range_valid(destination_port_range_min,
destination_port_range_max,
fc['protocol'])
source_ip_prefix = fc['source_ip_prefix']
destination_ip_prefix = fc['destination_ip_prefix']
logical_source_port = fc['logical_source_port']
logical_destination_port = fc['logical_destination_port']
with context.session.begin(subtransactions=True):
source_ip_prefix = self._get_fixed_ip_from_port(
context, logical_source_port, source_ip_prefix)
destination_ip_prefix = self._get_fixed_ip_from_port(
context, logical_destination_port, destination_ip_prefix)
flow_classifier_db = FlowClassifier(
id=uuidutils.generate_uuid(),
tenant_id=tenant_id,
name=fc['name'],
description=fc['description'],
ethertype=fc['ethertype'],
protocol=fc['protocol'],
source_port_range_min=source_port_range_min,
source_port_range_max=source_port_range_max,
destination_port_range_min=destination_port_range_min,
destination_port_range_max=destination_port_range_max,
source_ip_prefix=source_ip_prefix,
destination_ip_prefix=destination_ip_prefix,
l7_parameters=l7_parameters
)
context.session.add(flow_classifier_db)
return self._make_flow_classifier_dict(flow_classifier_db)
def _make_flow_classifier_dict(self, flow_classifier, fields=None):
res = {
'id': flow_classifier['id'],
'name': flow_classifier['name'],
'description': flow_classifier['description'],
'tenant_id': flow_classifier['tenant_id'],
'ethertype': flow_classifier['ethertype'],
'protocol': flow_classifier['protocol'],
'source_port_range_min': flow_classifier['source_port_range_min'],
'source_port_range_max': flow_classifier['source_port_range_max'],
'destination_port_range_min': (
flow_classifier['destination_port_range_min']),
'destination_port_range_max': (
flow_classifier['destination_port_range_max']),
'source_ip_prefix': flow_classifier['source_ip_prefix'],
'destination_ip_prefix': flow_classifier['destination_ip_prefix'],
'l7_parameters': {
param['keyword']: param['value']
for k, param in six.iteritems(flow_classifier.l7_parameters)
}
}
return self._fields(res, fields)
@log_helpers.log_method_call
def get_flow_classifiers(self, context, filters=None, fields=None,
sorts=None, limit=None, marker=None,
page_reverse=False):
marker_obj = self._get_marker_obj(context, 'flow_classifier',
limit, marker)
return self._get_collection(context,
FlowClassifier,
self._make_flow_classifier_dict,
filters=filters, fields=fields,
sorts=sorts,
limit=limit, marker_obj=marker_obj,
page_reverse=page_reverse)
@log_helpers.log_method_call
def get_flow_classifier(self, context, id, fields=None):
flow_classifier = self._get_flow_classifier(context, id)
return self._make_flow_classifier_dict(flow_classifier, fields)
def _get_flow_classifier(self, context, id):
try:
return self._get_by_id(context, FlowClassifier, id)
except exc.NoResultFound:
raise fc_ext.FlowClassifierNotFound(id=id)
def _get_port(self, context, id):
try:
return self._get_by_id(context, models_v2.Port, id)
except exc.NoResultFound:
raise fc_ext.FlowClassifierPortNotFound(id=id)
@log_helpers.log_method_call
def update_flow_classifier(self, context, id, flow_classifier):
new_fc = flow_classifier['flow_classifier']
with context.session.begin(subtransactions=True):
old_fc = self._get_flow_classifier(context, id)
old_fc.update(new_fc)
return self._make_flow_classifier_dict(old_fc)
@log_helpers.log_method_call
def delete_flow_classifier(self, context, id):
try:
with context.session.begin(subtransactions=True):
fc = self._get_flow_classifier(context, id)
context.session.delete(fc)
except AssertionError:
raise fc_ext.FlowClassifierInUse(id=id)
except fc_ext.FlowClassifierNotFound:
LOG.info(_LI("Deleting a non-existing flow classifier."))
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