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#

# Copyright (c) 2012 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 mock

from oslo.config import cfg

from six.moves import xrange

import testtools

from testtools import matchers

from neutron.common import exceptions as n_exc

from neutron.db import api as db

from neutron.openstack.common.db import exception as db_exc

from neutron.openstack.common.db.sqlalchemy import session

from neutron.plugins.openvswitch import ovs_db_v2

from neutron.plugins.openvswitch import ovs_models_v2 as ovs_models

from neutron.tests import base

from neutron.tests.unit import test_db_plugin as test_plugin

PHYS_NET = 'physnet1'

PHYS_NET_2 = 'physnet2'

VLAN_MIN = 10

VLAN_MAX = 19

VLAN_RANGES = {PHYS_NET: [(VLAN_MIN, VLAN_MAX)]}

UPDATED_VLAN_RANGES = {PHYS_NET: [(VLAN_MIN + 5, VLAN_MAX + 5)],

PHYS_NET_2: [(VLAN_MIN + 20, VLAN_MAX + 20)]}

TUN_MIN = 100

TUN_MAX = 109

TUNNEL_RANGES = [(TUN_MIN, TUN_MAX)]

UPDATED_TUNNEL_RANGES = [(TUN_MIN + 5, TUN_MAX + 5)]

PLUGIN_NAME = ('neutron.plugins.openvswitch.'

'ovs_neutron_plugin.OVSNeutronPluginV2')

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class VlanAllocationsTest(base.BaseTestCase):

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    def setUp(self):

        super(VlanAllocationsTest, self).setUp()

        db.configure_db()

        ovs_db_v2.sync_vlan_allocations(VLAN_RANGES)

        self.session = db.get_session()

        self.addCleanup(db.clear_db)

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    def test_sync_vlan_allocations(self):

        self.assertIsNone(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                        VLAN_MIN - 1))

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       VLAN_MIN).allocated)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       VLAN_MIN + 1).allocated)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       VLAN_MAX - 1).allocated)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       VLAN_MAX).allocated)

        self.assertIsNone(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                        VLAN_MAX + 1))

        ovs_db_v2.sync_vlan_allocations(UPDATED_VLAN_RANGES)

        self.assertIsNone(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                        VLAN_MIN + 5 - 1))

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       VLAN_MIN + 5).

                         allocated)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       VLAN_MIN + 5 + 1).

                         allocated)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       VLAN_MAX + 5 - 1).

                         allocated)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       VLAN_MAX + 5).

                         allocated)

        self.assertIsNone(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                        VLAN_MAX + 5 + 1))

        self.assertIsNone(ovs_db_v2.get_vlan_allocation(PHYS_NET_2,

                                                        VLAN_MIN + 20 - 1))

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET_2,

                                                       VLAN_MIN + 20).

                         allocated)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET_2,

                                                       VLAN_MIN + 20 + 1).

                         allocated)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET_2,

                                                       VLAN_MAX + 20 - 1).

                         allocated)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET_2,

                                                       VLAN_MAX + 20).

                         allocated)

        self.assertIsNone(ovs_db_v2.get_vlan_allocation(PHYS_NET_2,

                                                        VLAN_MAX + 20 + 1))

        ovs_db_v2.sync_vlan_allocations(VLAN_RANGES)

        self.assertIsNone(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                        VLAN_MIN - 1))

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       VLAN_MIN).allocated)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       VLAN_MIN + 1).allocated)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       VLAN_MAX - 1).allocated)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       VLAN_MAX).allocated)

        self.assertIsNone(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                        VLAN_MAX + 1))

        self.assertIsNone(ovs_db_v2.get_vlan_allocation(PHYS_NET_2,

                                                        VLAN_MIN + 20))

        self.assertIsNone(ovs_db_v2.get_vlan_allocation(PHYS_NET_2,

                                                        VLAN_MAX + 20))

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    def test_vlan_pool(self):

        vlan_ids = set()

        for x in xrange(VLAN_MIN, VLAN_MAX + 1):

            physical_network, vlan_id = ovs_db_v2.reserve_vlan(self.session)

            self.assertEqual(physical_network, PHYS_NET)

            self.assertThat(vlan_id, matchers.GreaterThan(VLAN_MIN - 1))

            self.assertThat(vlan_id, matchers.LessThan(VLAN_MAX + 1))

            vlan_ids.add(vlan_id)

        with testtools.ExpectedException(n_exc.NoNetworkAvailable):

            physical_network, vlan_id = ovs_db_v2.reserve_vlan(self.session)

        ovs_db_v2.release_vlan(self.session, PHYS_NET, vlan_ids.pop(),

                               VLAN_RANGES)

        physical_network, vlan_id = ovs_db_v2.reserve_vlan(self.session)

        self.assertEqual(physical_network, PHYS_NET)

        self.assertThat(vlan_id, matchers.GreaterThan(VLAN_MIN - 1))

        self.assertThat(vlan_id, matchers.LessThan(VLAN_MAX + 1))

        vlan_ids.add(vlan_id)

        for vlan_id in vlan_ids:

            ovs_db_v2.release_vlan(self.session, PHYS_NET, vlan_id,

                                   VLAN_RANGES)

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    def test_specific_vlan_inside_pool(self):

        vlan_id = VLAN_MIN + 5

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       vlan_id).allocated)

        ovs_db_v2.reserve_specific_vlan(self.session, PHYS_NET, vlan_id)

        self.assertTrue(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                      vlan_id).allocated)

        with testtools.ExpectedException(n_exc.VlanIdInUse):

            ovs_db_v2.reserve_specific_vlan(self.session, PHYS_NET, vlan_id)

        ovs_db_v2.release_vlan(self.session, PHYS_NET, vlan_id, VLAN_RANGES)

        self.assertFalse(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                       vlan_id).allocated)

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    def test_specific_vlan_outside_pool(self):

        vlan_id = VLAN_MAX + 5

        self.assertIsNone(ovs_db_v2.get_vlan_allocation(PHYS_NET, vlan_id))

        ovs_db_v2.reserve_specific_vlan(self.session, PHYS_NET, vlan_id)

        self.assertTrue(ovs_db_v2.get_vlan_allocation(PHYS_NET,

                                                      vlan_id).allocated)

        with testtools.ExpectedException(n_exc.VlanIdInUse):

            ovs_db_v2.reserve_specific_vlan(self.session, PHYS_NET, vlan_id)

        ovs_db_v2.release_vlan(self.session, PHYS_NET, vlan_id, VLAN_RANGES)

        self.assertIsNone(ovs_db_v2.get_vlan_allocation(PHYS_NET, vlan_id))

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    def test_sync_with_allocated_false(self):

        vlan_ids = set()

        for x in xrange(VLAN_MIN, VLAN_MAX + 1):

            physical_network, vlan_id = ovs_db_v2.reserve_vlan(self.session)

            self.assertEqual(physical_network, PHYS_NET)

            self.assertThat(vlan_id, matchers.GreaterThan(VLAN_MIN - 1))

            self.assertThat(vlan_id, matchers.LessThan(VLAN_MAX + 1))

            vlan_ids.add(vlan_id)

        ovs_db_v2.release_vlan(self.session, PHYS_NET, vlan_ids.pop(),

                               VLAN_RANGES)

        ovs_db_v2.sync_vlan_allocations({})

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class TunnelAllocationsTest(base.BaseTestCase):

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    def setUp(self):

        super(TunnelAllocationsTest, self).setUp()

        db.configure_db()

        ovs_db_v2.sync_tunnel_allocations(TUNNEL_RANGES)

        self.session = db.get_session()

        self.addCleanup(db.clear_db)

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    def test_sync_tunnel_allocations(self):

        self.assertIsNone(ovs_db_v2.get_tunnel_allocation(TUN_MIN - 1))

        self.assertFalse(ovs_db_v2.get_tunnel_allocation(TUN_MIN).allocated)

        self.assertFalse(ovs_db_v2.get_tunnel_allocation(TUN_MIN + 1).

                         allocated)

        self.assertFalse(ovs_db_v2.get_tunnel_allocation(TUN_MAX - 1).

                         allocated)

        self.assertFalse(ovs_db_v2.get_tunnel_allocation(TUN_MAX).allocated)

        self.assertIsNone(ovs_db_v2.get_tunnel_allocation(TUN_MAX + 1))

        ovs_db_v2.sync_tunnel_allocations(UPDATED_TUNNEL_RANGES)

        self.assertIsNone(ovs_db_v2.get_tunnel_allocation(TUN_MIN + 5 - 1))

        self.assertFalse(ovs_db_v2.get_tunnel_allocation(TUN_MIN + 5).

                         allocated)

        self.assertFalse(ovs_db_v2.get_tunnel_allocation(TUN_MIN + 5 + 1).

                         allocated)

        self.assertFalse(ovs_db_v2.get_tunnel_allocation(TUN_MAX + 5 - 1).

                         allocated)

        self.assertFalse(ovs_db_v2.get_tunnel_allocation(TUN_MAX + 5).

                         allocated)

        self.assertIsNone(ovs_db_v2.get_tunnel_allocation(TUN_MAX + 5 + 1))

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    def test_tunnel_pool(self):

        tunnel_ids = set()

        for x in xrange(TUN_MIN, TUN_MAX + 1):

            tunnel_id = ovs_db_v2.reserve_tunnel(self.session)

            self.assertThat(tunnel_id, matchers.GreaterThan(TUN_MIN - 1))

            self.assertThat(tunnel_id, matchers.LessThan(TUN_MAX + 1))

            tunnel_ids.add(tunnel_id)

        with testtools.ExpectedException(n_exc.NoNetworkAvailable):

            tunnel_id = ovs_db_v2.reserve_tunnel(self.session)

        ovs_db_v2.release_tunnel(self.session, tunnel_ids.pop(), TUNNEL_RANGES)

        tunnel_id = ovs_db_v2.reserve_tunnel(self.session)

        self.assertThat(tunnel_id, matchers.GreaterThan(TUN_MIN - 1))

        self.assertThat(tunnel_id, matchers.LessThan(TUN_MAX + 1))

        tunnel_ids.add(tunnel_id)

        for tunnel_id in tunnel_ids:

            ovs_db_v2.release_tunnel(self.session, tunnel_id, TUNNEL_RANGES)

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    def test_add_tunnel_endpoints(self):

        tun_1 = ovs_db_v2.add_tunnel_endpoint('192.168.0.1')

        tun_2 = ovs_db_v2.add_tunnel_endpoint('192.168.0.2')

        self.assertEqual(1, tun_1.id)

        self.assertEqual('192.168.0.1', tun_1.ip_address)

        self.assertEqual(2, tun_2.id)

        self.assertEqual('192.168.0.2', tun_2.ip_address)

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    def test_specific_tunnel_inside_pool(self):

        tunnel_id = TUN_MIN + 5

        self.assertFalse(ovs_db_v2.get_tunnel_allocation(tunnel_id).allocated)

        ovs_db_v2.reserve_specific_tunnel(self.session, tunnel_id)

        self.assertTrue(ovs_db_v2.get_tunnel_allocation(tunnel_id).allocated)

        with testtools.ExpectedException(n_exc.TunnelIdInUse):

            ovs_db_v2.reserve_specific_tunnel(self.session, tunnel_id)

        ovs_db_v2.release_tunnel(self.session, tunnel_id, TUNNEL_RANGES)

        self.assertFalse(ovs_db_v2.get_tunnel_allocation(tunnel_id).allocated)

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    def test_specific_tunnel_outside_pool(self):

        tunnel_id = TUN_MAX + 5

        self.assertIsNone(ovs_db_v2.get_tunnel_allocation(tunnel_id))

        ovs_db_v2.reserve_specific_tunnel(self.session, tunnel_id)

        self.assertTrue(ovs_db_v2.get_tunnel_allocation(tunnel_id).allocated)

        with testtools.ExpectedException(n_exc.TunnelIdInUse):

            ovs_db_v2.reserve_specific_tunnel(self.session, tunnel_id)

        ovs_db_v2.release_tunnel(self.session, tunnel_id, TUNNEL_RANGES)

        self.assertIsNone(ovs_db_v2.get_tunnel_allocation(tunnel_id))

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    def test_add_tunnel_endpoint_create_new_endpoint(self):

        addr = '10.0.0.1'

        ovs_db_v2.add_tunnel_endpoint(addr)

        self.assertIsNotNone(self.session.query(ovs_models.TunnelEndpoint).

                             filter_by(ip_address=addr).first())

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    def test_add_tunnel_endpoint_retrieve_an_existing_endpoint(self):

        addr = '10.0.0.1'

        self.session.add(ovs_models.TunnelEndpoint(ip_address=addr, id=1))

        self.session.flush()

        tunnel = ovs_db_v2.add_tunnel_endpoint(addr)

        self.assertEqual(tunnel.id, 1)

        self.assertEqual(tunnel.ip_address, addr)

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    def test_add_tunnel_endpoint_handle_duplicate_error(self):

        with mock.patch.object(session.Session, 'query') as query_mock:

            error = db_exc.DBDuplicateEntry(['id'])

            query_mock.side_effect = error

            with testtools.ExpectedException(n_exc.NeutronException):

                ovs_db_v2.add_tunnel_endpoint('10.0.0.1', 5)

            self.assertEqual(query_mock.call_count, 5)

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class NetworkBindingsTest(test_plugin.NeutronDbPluginV2TestCase):

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    def setUp(self):

        cfg.CONF.set_override('network_vlan_ranges', ['physnet1:1000:2999'],

                              group='OVS')

        super(NetworkBindingsTest, self).setUp(plugin=PLUGIN_NAME)

        db.configure_db()

        self.session = db.get_session()

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    def test_add_network_binding(self):

        params = {'provider:network_type': 'vlan',

                  'provider:physical_network': PHYS_NET,

                  'provider:segmentation_id': 1234}

        params['arg_list'] = tuple(params.keys())

        with self.network(**params) as network:

            TEST_NETWORK_ID = network['network']['id']

            binding = ovs_db_v2.get_network_binding(self.session,

                                                    TEST_NETWORK_ID)

            self.assertIsNotNone(binding)

            self.assertEqual(binding.network_id, TEST_NETWORK_ID)

            self.assertEqual(binding.network_type, 'vlan')

            self.assertEqual(binding.physical_network, PHYS_NET)

            self.assertEqual(binding.segmentation_id, 1234)