/
port_forwarding.py
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/
port_forwarding.py
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# Copyright (c) 2018 OpenStack Foundation
#
# 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 itertools
import netaddr
from neutron_lib.db import api as db_api
from neutron_lib.objects import common_types
from neutron.db.models import l3
from neutron.db.models import port_forwarding as models
from neutron.objects import base
from neutron_lib import constants as lib_const
from oslo_utils import versionutils
from oslo_versionedobjects import fields as obj_fields
FIELDS_NOT_SUPPORT_FILTER = ['internal_ip_address', 'internal_port']
@base.NeutronObjectRegistry.register
class PortForwarding(base.NeutronDbObject):
# Version 1.0: Initial version
# Version 1.1: Change unique constraint
# Version 1.2: Add "description" field
# Version 1.3: Add "external_port_range" and "internal_port_range" fields
VERSION = '1.3'
db_model = models.PortForwarding
primary_keys = ['id']
foreign_keys = {'FloatingIP': {'floatingip_id': 'id'},
'Port': {'internal_port_id': 'id'}}
fields_need_translation = {
'internal_port_id': 'internal_neutron_port_id'
}
fields = {
'id': common_types.UUIDField(),
'floatingip_id': common_types.UUIDField(nullable=False),
'external_port': common_types.PortRangeField(nullable=True),
'external_port_range': common_types.PortRangesField(nullable=True),
'protocol': common_types.IpProtocolEnumField(nullable=False),
'internal_port_id': common_types.UUIDField(nullable=False),
'internal_ip_address': obj_fields.IPV4AddressField(),
'internal_port': common_types.PortRangeField(nullable=True),
'internal_port_range': common_types.PortRangesField(nullable=True),
'floating_ip_address': obj_fields.IPV4AddressField(),
'router_id': common_types.UUIDField(),
'description': obj_fields.StringField()
}
comparision_ignored_fields = ['revision_number', 'updated_at',
'created_at']
synthetic_fields = ['floating_ip_address', 'router_id']
fields_no_update = {
'id', 'floatingip_id'
}
def __eq__(self, other):
for attr in self.fields:
# Some fields are inherited from standards attributes and are
# irrelevant while comparing two PortForwarding.
if attr in self.comparision_ignored_fields:
continue
if getattr(self, attr) != getattr(other, attr):
return False
return True
def _new_instance(self, **kwargs):
fields_parameters = {f: getattr(self, f)
for f in self.fields if hasattr(self, f)}
sanitized_kwargs = {k: kwargs[k]
for k in kwargs if k in self.fields}
fields_parameters.update(sanitized_kwargs)
return PortForwarding(**fields_parameters)
def unroll_port_ranges(self):
extrn_port_range = self.external_port_range
intrn_port_range = self.internal_port_range
if not extrn_port_range:
return [self]
if ':' not in extrn_port_range:
return [self._new_instance(
external_port=int(extrn_port_range),
internal_port=self.internal_port or int(intrn_port_range),
external_port_range=None,
internal_port_range=None
)]
if ":" not in intrn_port_range:
intrn_port_range = "%s:%s" % (intrn_port_range, intrn_port_range)
extrn_min, extrn_max = map(int, extrn_port_range.split(':'))
intrn_min, intrn_max = map(int, intrn_port_range.split(':'))
external_ports = list(range(extrn_min, extrn_max + 1))
internal_ports = list(range(intrn_min, intrn_max + 1))
intrn_multiplier = 1 if intrn_min != intrn_max else 0
portforwardings = []
for i, external_port in enumerate(external_ports):
internal_port = internal_ports[i * intrn_multiplier]
portforwardings.append(
self._new_instance(
external_port=external_port,
internal_port=internal_port,
external_port_range=None,
internal_port_range=None
),
)
return portforwardings
def obj_load_attr(self, attrname):
if attrname in ['floating_ip_address', 'router_id']:
return self._load_attr_from_fip(attrname)
super(PortForwarding, self).obj_load_attr(attrname)
def _load_attr_from_fip(self, attrname):
value = getattr(self.db_obj.floating_ip, attrname)
setattr(self, attrname, value)
self.obj_reset_changes([attrname])
def from_db_object(self, db_obj):
super(PortForwarding, self).from_db_object(db_obj)
self._load_attr_from_fip(attrname='router_id')
self._load_attr_from_fip(attrname='floating_ip_address')
def obj_make_compatible(self, primitive, target_version):
_target_version = versionutils.convert_version_to_tuple(target_version)
if _target_version < (1, 2):
primitive.pop('description', None)
if _target_version < (1, 3):
primitive['internal_port'] = int(
str(primitive.pop(
'internal_port_range',
str(primitive.get('internal_port',
'')))).split(':', maxsplit=1)[0])
primitive['external_port'] = int(
str(primitive.pop(
'external_port_range',
str(primitive.get('external_port',
'')))).split(':', maxsplit=1)[0])
@staticmethod
def _modify_single_ports_to_db(result):
internal_port = result.pop('internal_port', None)
external_port = result.pop('external_port', None)
if internal_port:
result['internal_port_start'] = internal_port
result['internal_port_end'] = internal_port
if external_port:
result['external_port_start'] = external_port
result['external_port_end'] = external_port
@staticmethod
def _modify_ports_range_to_db(result):
internal_port_range = result.pop('internal_port_range', None)
external_port_range = result.pop('external_port_range', None)
if internal_port_range:
if isinstance(internal_port_range, list):
internal_port_range = internal_port_range[0]
if isinstance(internal_port_range,
int) or internal_port_range.isnumeric():
start = end = str(internal_port_range)
else:
start, end = internal_port_range.split(':')
result['internal_port_start'] = start
result['internal_port_end'] = end
if external_port_range:
if isinstance(external_port_range, list):
external_port_range = external_port_range[0]
if isinstance(external_port_range,
int) or external_port_range.isnumeric():
start = end = str(external_port_range)
else:
start, end = external_port_range.split(':')
result['external_port_start'] = start
result['external_port_end'] = end
@staticmethod
def _modify_ports_range_from_db(result,
internal_port_start=None,
internal_port_end=None,
external_port_start=None,
external_port_end=None):
if not internal_port_start or not external_port_start:
return
result['external_port_range'] = '%s:%s' % (external_port_start,
external_port_end)
result['internal_port_range'] = '%s:%s' % (internal_port_start,
internal_port_end)
@staticmethod
def _modify_single_ports_from_db(result,
internal_port_start=None,
internal_port_end=None,
external_port_start=None,
external_port_end=None):
if not internal_port_start or not external_port_start:
return
if internal_port_start == internal_port_end:
result['internal_port'] = int(internal_port_start)
if external_port_start == external_port_end:
result['external_port'] = int(external_port_start)
@classmethod
def modify_fields_from_db(cls, db_obj):
result = super(PortForwarding, cls).modify_fields_from_db(db_obj)
if 'internal_ip_address' in result:
result['internal_ip_address'] = netaddr.IPAddress(
result['internal_ip_address'], version=lib_const.IP_VERSION_4)
external_port_start = db_obj.get('external_port_start')
external_port_end = db_obj.get('external_port_end')
internal_port_start = db_obj.get('internal_port_start')
internal_port_end = db_obj.get('internal_port_end')
cls._modify_single_ports_from_db(
result,
internal_port_start=internal_port_start,
external_port_start=external_port_start,
internal_port_end=internal_port_end,
external_port_end=external_port_end)
cls._modify_ports_range_from_db(
result,
internal_port_start=internal_port_start,
external_port_start=external_port_start,
internal_port_end=internal_port_end,
external_port_end=external_port_end)
return result
@classmethod
def modify_fields_to_db(cls, fields):
result = super(PortForwarding, cls).modify_fields_to_db(fields)
cls._modify_ports_range_to_db(result)
cls._modify_single_ports_to_db(result)
if 'internal_ip_address' in result:
if isinstance(result['internal_ip_address'], list):
result['internal_ip_address'] = list(
map(str, result['internal_ip_address']))
else:
result['internal_ip_address'] = str(
result['internal_ip_address'])
return result
@classmethod
@db_api.CONTEXT_READER
def get_port_forwarding_obj_by_routers(cls, context, router_ids):
query = context.session.query(cls.db_model, l3.FloatingIP)
query = query.join(l3.FloatingIP,
cls.db_model.floatingip_id == l3.FloatingIP.id)
query = query.filter(l3.FloatingIP.router_id.in_(router_ids))
return cls._unique_port_forwarding(query)
@staticmethod
def _unique_port_forwarding(query):
def _row_one(row):
return row[1]
q = query.order_by(l3.FloatingIP.router_id)
group_iterator = itertools.groupby(q, _row_one)
result = []
for key, value in group_iterator:
result.extend([(row[1]['router_id'], row[1]['floating_ip_address'],
row[0]['id'], row[1]['id']) for row in value])
return result