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# Copyright (C) 2016 Nippon Telegraph and Telephone Corporation.
#
# 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 logging
import unittest
from unittest import mock
from os_ken.lib.packet import bgp
from os_ken.services.protocols.bgp import peer
LOG = logging.getLogger(__name__)
class Test_Peer(unittest.TestCase):
"""
Test case for peer.Peer
"""
@mock.patch.object(
peer.Peer, '__init__', mock.MagicMock(return_value=None))
def _test_construct_as_path_attr(
self, input_as_path, input_as4_path, expected_as_path):
# Prepare input data
input_as_path_attr = bgp.BGPPathAttributeAsPath(input_as_path)
input_as4_path_attr = bgp.BGPPathAttributeAs4Path(input_as4_path)
_peer = peer.Peer(None, None, None, None, None)
# TEST
output_as_path_attr = _peer._construct_as_path_attr(
input_as_path_attr, input_as4_path_attr)
self.assertEqual(bgp.BGP_ATTR_TYPE_AS_PATH, output_as_path_attr.type)
self.assertEqual(expected_as_path, output_as_path_attr.path_seg_list)
def test_construct_as_path_attr_sequence_only(self):
# Test Data
# Input:
input_as_path = [[65000, 4000, 23456, 23456, 40001]]
input_as4_path = [[400000, 300000, 40001]]
# Expected:
expected_as_path = [[65000, 4000, 400000, 300000, 40001]]
self._test_construct_as_path_attr(
input_as_path, input_as4_path, expected_as_path)
def test_construct_as_path_attr_aggregated_as_path_1(self):
# Test Data
# Input:
input_as_path = [[65000, 4000], {10, 20, 30}, [23456, 23456, 40001]]
input_as4_path = [[400000, 300000, 40001]]
# Expected:
expected_as_path = [[65000, 4000], {10, 20, 30}, [400000, 300000, 40001]]
self._test_construct_as_path_attr(
input_as_path, input_as4_path, expected_as_path)
def test_construct_as_path_attr_aggregated_as_path_2(self):
# Test Data
# Input:
input_as_path = [[65000, 4000], {10, 20, 30}, [23456, 23456, 40001]]
input_as4_path = [[3000, 400000, 300000, 40001]]
# Expected:
expected_as_path = [[65000, 4000, 3000, 400000, 300000, 40001]]
self._test_construct_as_path_attr(
input_as_path, input_as4_path, expected_as_path)
def test_construct_as_path_attr_aggregated_path_3(self):
# Test Data
# Input:
input_as_path = [[65000, 4000, 23456, 23456, 40001]]
input_as4_path = [[400000, 300000, 40001], {10, 20, 30}]
# Expected:
expected_as_path = [[65000, 400000, 300000, 40001], {10, 20, 30}]
self._test_construct_as_path_attr(
input_as_path, input_as4_path, expected_as_path)
def test_construct_as_path_attr_aggregated_as4_path(self):
# Test Data
# Input:
input_as_path = [[65000, 4000, 23456, 23456, 40001]]
input_as4_path = [{10, 20, 30}, [400000, 300000, 40001]]
# Expected:
expected_as_path = [[65000], {10, 20, 30}, [400000, 300000, 40001]]
self._test_construct_as_path_attr(
input_as_path, input_as4_path, expected_as_path)
def test_construct_as_path_attr_too_short_as_path(self):
# Test Data
# Input:
input_as_path = [[65000, 4000, 23456, 23456, 40001]]
input_as4_path = [[100000, 65000, 4000, 400000, 300000, 40001]]
# Expected:
expected_as_path = [[65000, 4000, 23456, 23456, 40001]]
self._test_construct_as_path_attr(
input_as_path, input_as4_path, expected_as_path)
def test_construct_as_path_attr_too_short_as4_path(self):
# Test Data
# Input:
input_as_path = [[65000, 4000, 23456, 23456, 40001]]
input_as4_path = [[300000, 40001]]
# Expected:
expected_as_path = [[65000, 4000, 23456, 300000, 40001]]
self._test_construct_as_path_attr(
input_as_path, input_as4_path, expected_as_path)
def test_construct_as_path_attr_empty_as4_path(self):
# Test Data
# Input:
input_as_path = [[65000, 4000, 23456, 23456, 40001]]
input_as4_path = [[]]
# Expected:
expected_as_path = [[65000, 4000, 23456, 23456, 40001]]
self._test_construct_as_path_attr(
input_as_path, input_as4_path, expected_as_path)
@mock.patch.object(
peer.Peer, '__init__', mock.MagicMock(return_value=None))
def test_construct_as_path_attr_as4_path_None(self):
# Test Data
# Input:
input_as_path = [[65000, 4000, 23456, 23456, 40001]]
# input_as4_path = None
# Expected:
expected_as_path = [[65000, 4000, 23456, 23456, 40001]]
# Prepare input data
input_as_path_attr = bgp.BGPPathAttributeAsPath(input_as_path)
input_as4_path_attr = None
_peer = peer.Peer(None, None, None, None, None)
# TEST
output_as_path_attr = _peer._construct_as_path_attr(
input_as_path_attr, input_as4_path_attr)
self.assertEqual(bgp.BGP_ATTR_TYPE_AS_PATH, output_as_path_attr.type)
self.assertEqual(expected_as_path, output_as_path_attr.path_seg_list)
@mock.patch.object(
peer.Peer, '__init__', mock.MagicMock(return_value=None))
def _test_trans_as_path(
self, input_as_path, expected_as_path, expected_as4_path):
# Prepare input data
_peer = peer.Peer(None, None, None, None, None)
# TEST
output_as_path, output_as4_path = _peer._trans_as_path(input_as_path)
self.assertEqual(expected_as_path, output_as_path)
self.assertEqual(expected_as4_path, output_as4_path)
@mock.patch.object(
peer.Peer, 'is_four_octet_as_number_cap_valid',
mock.MagicMock(return_value=True))
def test_trans_as_path_as4_path_is_supported(self):
# Test Data
# Input:
input_as_path = [[65000, 4000, 400000, 300000, 40001]]
# Expected:
expected_as_path = [[65000, 4000, 400000, 300000, 40001]]
expected_as4_path = None
self._test_trans_as_path(
input_as_path, expected_as_path, expected_as4_path)
@mock.patch.object(
peer.Peer, 'is_four_octet_as_number_cap_valid',
mock.MagicMock(return_value=False))
def test_trans_as_path_sequence_only(self):
# Test Data
# Input:
input_as_path = [[65000, 4000, 400000, 300000, 40001]]
# Expected:
expected_as_path = [[65000, 4000, 23456, 23456, 40001]]
expected_as4_path = [[65000, 4000, 400000, 300000, 40001]]
self._test_trans_as_path(
input_as_path, expected_as_path, expected_as4_path)
@mock.patch.object(
peer.Peer, 'is_four_octet_as_number_cap_valid',
mock.MagicMock(return_value=False))
def test_trans_as_path_no_trans(self):
# Test Data
# Input:
input_as_path = [[65000, 4000, 40000, 30000, 40001]]
# Expected:
expected_as_path = [[65000, 4000, 40000, 30000, 40001]]
expected_as4_path = None
self._test_trans_as_path(
input_as_path, expected_as_path, expected_as4_path)
@mock.patch.object(
peer.Peer, '__init__', mock.MagicMock(return_value=None))
def _test_extract_and_reconstruct_as_path(
self, path_attributes, ex_as_path_value,
ex_aggregator_as_number, ex_aggregator_addr):
# Prepare test data
update_msg = bgp.BGPUpdate(path_attributes=path_attributes)
_peer = peer.Peer(None, None, None, None, None)
# Test
_peer._extract_and_reconstruct_as_path(update_msg)
umsg_pattrs = update_msg.pathattr_map
as_path_attr = umsg_pattrs.get(
bgp.BGP_ATTR_TYPE_AS_PATH, None)
as4_path_attr = umsg_pattrs.get(
bgp.BGP_ATTR_TYPE_AS4_PATH, None)
aggregator_attr = umsg_pattrs.get(
bgp.BGP_ATTR_TYPE_AGGREGATOR, None)
as4_aggregator_attr = umsg_pattrs.get(
bgp.BGP_ATTR_TYPE_AS4_AGGREGATOR, None)
self.assertEqual(ex_as_path_value, as_path_attr.value)
self.assertEqual(None, as4_path_attr)
self.assertEqual(ex_aggregator_as_number, aggregator_attr.as_number)
self.assertEqual(ex_aggregator_addr, aggregator_attr.addr)
self.assertEqual(None, as4_aggregator_attr)
@mock.patch.object(
peer.Peer, '__init__', mock.MagicMock(return_value=None))
def test_extract_and_reconstruct_as_path_with_no_as4_attr(self):
# Input values
in_as_path_value = [[1000, 2000, 3000]]
# in_as4_path_value
in_aggregator_as_number = 4000
in_aggregator_addr = '10.0.0.1'
# in_as4_aggregator_as_number
# in_as4_aggregator_addr
# Expected values
ex_as_path_value = [[1000, 2000, 3000]]
ex_aggregator_as_number = 4000
ex_aggregator_addr = '10.0.0.1'
# Prepare test data
path_attributes = [
bgp.BGPPathAttributeAsPath(
value=in_as_path_value),
bgp.BGPPathAttributeAggregator(
as_number=in_aggregator_as_number, addr=in_aggregator_addr),
]
# Test
self._test_extract_and_reconstruct_as_path(
path_attributes, ex_as_path_value,
ex_aggregator_as_number, ex_aggregator_addr)
@mock.patch.object(
peer.Peer, '__init__', mock.MagicMock(return_value=None))
def test_extract_and_reconstruct_as_path_with_as4_attr(self):
# Input values
in_as_path_value = [[1000, 23456, 3000]]
in_as4_path_value = [[2000, 3000]]
in_aggregator_as_number = 23456
in_aggregator_addr = '10.0.0.1'
in_as4_aggregator_as_number = 4000
in_as4_aggregator_addr = '10.0.0.1'
# Expected values
ex_as_path_value = [[1000, 2000, 3000]]
ex_aggregator_as_number = 4000
ex_aggregator_addr = '10.0.0.1'
# Prepare test data
path_attributes = [
bgp.BGPPathAttributeAsPath(
value=in_as_path_value),
bgp.BGPPathAttributeAs4Path(
value=in_as4_path_value),
bgp.BGPPathAttributeAggregator(
as_number=in_aggregator_as_number,
addr=in_aggregator_addr),
bgp.BGPPathAttributeAs4Aggregator(
as_number=in_as4_aggregator_as_number,
addr=in_as4_aggregator_addr),
]
# Test
self._test_extract_and_reconstruct_as_path(
path_attributes, ex_as_path_value,
ex_aggregator_as_number, ex_aggregator_addr)
@mock.patch.object(
peer.Peer, '__init__', mock.MagicMock(return_value=None))
def test_extract_and_reconstruct_as_path_with_not_trans_as_aggr(self):
# Input values
in_as_path_value = [[1000, 23456, 3000]]
in_as4_path_value = [[2000, 3000]]
in_aggregator_as_number = 4000 # not AS_TRANS
in_aggregator_addr = '10.0.0.1'
in_as4_aggregator_as_number = 4000
in_as4_aggregator_addr = '10.0.0.1'
# Expected values
ex_as_path_value = [[1000, 23456, 3000]]
ex_aggregator_as_number = 4000
ex_aggregator_addr = '10.0.0.1'
# Prepare test data
path_attributes = [
bgp.BGPPathAttributeAsPath(
value=in_as_path_value),
bgp.BGPPathAttributeAs4Path(
value=in_as4_path_value),
bgp.BGPPathAttributeAggregator(
as_number=in_aggregator_as_number,
addr=in_aggregator_addr),
bgp.BGPPathAttributeAs4Aggregator(
as_number=in_as4_aggregator_as_number,
addr=in_as4_aggregator_addr),
]
# Test
self._test_extract_and_reconstruct_as_path(
path_attributes, ex_as_path_value,
ex_aggregator_as_number, ex_aggregator_addr)
@mock.patch.object(
peer.Peer, '__init__', mock.MagicMock(return_value=None))
def test_extract_and_reconstruct_as_path_with_short_as_path(self):
# Input values
in_as_path_value = [[1000, 23456, 3000]]
in_as4_path_value = [[2000, 3000, 4000, 5000]] # longer than AS_PATH
in_aggregator_as_number = 4000
in_aggregator_addr = '10.0.0.1'
# in_as4_aggregator_as_number
# in_as4_aggregator_addr
# Expected values
ex_as_path_value = [[1000, 23456, 3000]]
ex_aggregator_as_number = 4000
ex_aggregator_addr = '10.0.0.1'
# Prepare test data
path_attributes = [
bgp.BGPPathAttributeAsPath(
value=in_as_path_value),
bgp.BGPPathAttributeAs4Path(
value=in_as4_path_value),
bgp.BGPPathAttributeAggregator(
as_number=in_aggregator_as_number,
addr=in_aggregator_addr),
]
# Test
self._test_extract_and_reconstruct_as_path(
path_attributes, ex_as_path_value,
ex_aggregator_as_number, ex_aggregator_addr)
def _test_is_looped_path_attrs(
self, path_attributes, local_as, ex_returned_value,
allow_local_as_in_count=False):
# Prepare test data
update_msg = bgp.BGPUpdate(path_attributes=path_attributes)
neigh_conf = mock.Mock()
neigh_conf.local_as = local_as
neigh_conf.stats_time = 0
common_conf = mock.Mock()
common_conf.allow_local_as_in_count = allow_local_as_in_count
common_conf.cluster_id = '10.0.0.1'
protocol = mock.Mock()
protocol._remotename = ('10.2.2.2', '179')
protocol._localname = ('10.0.0.1', '179')
protocol.recv_open_msg = mock.Mock()
protocol.recv_open_msg.bgp_identifier = '10.0.0.1'
prepared_peer = peer.Peer(
common_conf, neigh_conf, None, mock.Mock(), None)
prepared_peer._set_protocol(protocol)
# Test
test_result_value = prepared_peer._is_looped_path_attrs(update_msg)
self.assertEqual(ex_returned_value, test_result_value)
def test_is_looped_path_attrs_with_no_loop(self):
# Prepare test data
in_as_path_value = [[1000, 23456, 3000]]
local_as = 11111
path_attributes = [
bgp.BGPPathAttributeAsPath(
value=in_as_path_value),
]
# Expected values
ex_returned_value = False
# Test
self._test_is_looped_path_attrs(
path_attributes, local_as, ex_returned_value)
def test_is_looped_path_attrs_with_loop_allowed(self):
# Prepare test data
in_as_path_value = [[1000, 23456, 3000]]
local_as = 23456
path_attributes = [
bgp.BGPPathAttributeAsPath(
value=in_as_path_value),
]
allow_local_as_in_count = True
# Expected values
ex_returned_value = False
# Test
self._test_is_looped_path_attrs(
path_attributes, local_as, ex_returned_value,
allow_local_as_in_count)
def test_is_looped_path_attrs_with_as_path_loop(self):
# Prepare test data
in_as_path_value = [[1000, 23456, 3000]]
local_as = 23456
path_attributes = [
bgp.BGPPathAttributeAsPath(
value=in_as_path_value),
]
# Expected values
ex_returned_value = True
# Test
self._test_is_looped_path_attrs(
path_attributes, local_as, ex_returned_value)
def test_is_looped_path_attrs_with_originator_loop(self):
# Prepare test data
local_as = 11111
path_attributes = [
bgp.BGPPathAttributeOriginatorId(
value='10.0.0.1'),
]
# Expected values
ex_returned_value = True
# Test
self._test_is_looped_path_attrs(
path_attributes, local_as, ex_returned_value)
def test_is_looped_path_attrs_with_cluster_loop(self):
# Prepare test data
local_as = 11111
path_attributes = [
bgp.BGPPathAttributeClusterList(
value=['10.0.0.1', '10.0.0.2']),
]
# Expected values
ex_returned_value = True
# Test
self._test_is_looped_path_attrs(
path_attributes, local_as, ex_returned_value)
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