openstack/ironic-python-agent
Code Issues Proposed changes
ae8e10e582
ironic-python-agent/ironic_python_agent/tests/unit/test_netutils.py
Sam Betts b536fbba61 [LLDP] Skip NICs that say they are ready but are unreadable. 
While listening for LLDP packets, if one of the sockets marks itself as
ready to read then our code will try to read data from that socket, but
if something goes wrong while reading that data then it causes IPA to
raise out of the loop skipping any other of the other NICs which might
have worked. This patch adds code to catch and LOG any exception that is
raised while we are trying to read data from one of the sockets so that
we can proceed to process all the NICs.

Change-Id: I8546097f5ae23755a5fdb448902007a2d823b7bf
Closes-Bug: #1665025
2017-11-28 17:25:43 +00:00

397 lines
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Python
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# Copyright 2014 Rackspace, Inc.
#
# 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 binascii
import socket
import mock
from oslo_config import cfg
from ironic_python_agent import netutils
from ironic_python_agent.tests.unit import base
# hexlify-ed output from LLDP packet
FAKE_LLDP_PACKET = binascii.unhexlify(
'0180c200000e885a92365a3988cc'
'0000'
'020704885a92ec5459'
'040d0545746865726e6574312f3138'
'06020078'
)
cfg.CONF.import_opt('lldp_timeout', 'ironic_python_agent.config')
def socket_socket_sig(family=None, type=None, proto=None):
# Signature for socket.socket to be used by mock
pass
class TestNetutils(base.IronicAgentTest):
def setUp(self):
super(TestNetutils, self).setUp()
@mock.patch('fcntl.ioctl', autospec=True)
@mock.patch('select.select', autospec=True)
@mock.patch('socket.socket', autospec=socket_socket_sig)
def test_get_lldp_info(self, sock_mock, select_mock, fcntl_mock):
expected_lldp = {
'eth1': [
(0, b''),
(1, b'\x04\x88Z\x92\xecTY'),
(2, b'\x05Ethernet1/18'),
(3, b'\x00x')],
'eth0': [
(0, b''),
(1, b'\x04\x88Z\x92\xecTY'),
(2, b'\x05Ethernet1/18'),
(3, b'\x00x')]
}
interface_names = ['eth0', 'eth1']
sock1 = mock.Mock()
sock1.recv.return_value = FAKE_LLDP_PACKET
sock1.fileno.return_value = 4
sock2 = mock.Mock()
sock2.recv.return_value = FAKE_LLDP_PACKET
sock2.fileno.return_value = 5
sock_mock.side_effect = [sock1, sock2]
select_mock.side_effect = [
([sock1], [], []),
([sock2], [], [])
]
lldp_info = netutils.get_lldp_info(interface_names)
self.assertEqual(expected_lldp, lldp_info)
sock1.bind.assert_called_with(('eth0', netutils.LLDP_ETHERTYPE))
sock2.bind.assert_called_with(('eth1', netutils.LLDP_ETHERTYPE))
sock1.recv.assert_called_with(1600)
sock2.recv.assert_called_with(1600)
self.assertEqual(1, sock1.close.call_count)
self.assertEqual(1, sock2.close.call_count)
# 2 interfaces, 2 calls to enter promiscuous mode, 1 to leave
self.assertEqual(6, fcntl_mock.call_count)
@mock.patch('fcntl.ioctl', autospec=True)
@mock.patch('select.select', autospec=True)
@mock.patch('socket.socket', autospec=socket_socket_sig)
def test_get_lldp_info_socket_recv_error(self, sock_mock, select_mock,
fcntl_mock):
expected_lldp = {
'eth1': [
(0, b''),
(1, b'\x04\x88Z\x92\xecTY'),
(2, b'\x05Ethernet1/18'),
(3, b'\x00x')]
}
interface_names = ['eth0', 'eth1']
sock1 = mock.Mock()
sock1.recv.side_effect = socket.error("BOOM")
sock2 = mock.Mock()
sock2.recv.return_value = FAKE_LLDP_PACKET
sock2.fileno.return_value = 5
sock_mock.side_effect = [sock1, sock2]
select_mock.side_effect = [
([sock1], [], []),
([sock2], [], [])
]
lldp_info = netutils.get_lldp_info(interface_names)
self.assertEqual(expected_lldp, lldp_info)
sock1.bind.assert_called_with(('eth0', netutils.LLDP_ETHERTYPE))
sock2.bind.assert_called_with(('eth1', netutils.LLDP_ETHERTYPE))
sock1.recv.assert_called_with(1600)
sock2.recv.assert_called_with(1600)
self.assertEqual(1, sock1.close.call_count)
self.assertEqual(1, sock2.close.call_count)
# 2 interfaces, 2 calls to enter promiscuous mode, 1 to leave
self.assertEqual(6, fcntl_mock.call_count)
@mock.patch('fcntl.ioctl', autospec=True)
@mock.patch('select.select', autospec=True)
@mock.patch('socket.socket', autospec=socket_socket_sig)
def test_get_lldp_info_multiple(self, sock_mock, select_mock, fcntl_mock):
expected_lldp = {
'eth1': [
(0, b''),
(1, b'\x04\x88Z\x92\xecTY'),
(2, b'\x05Ethernet1/18'),
(3, b'\x00x')],
'eth0': [
(0, b''),
(1, b'\x04\x88Z\x92\xecTY'),
(2, b'\x05Ethernet1/18'),
(3, b'\x00x')]
}
interface_names = ['eth0', 'eth1']
sock1 = mock.Mock()
sock1.recv.return_value = FAKE_LLDP_PACKET
sock1.fileno.return_value = 4
sock2 = mock.Mock()
sock2.recv.return_value = FAKE_LLDP_PACKET
sock2.fileno.return_value = 5
sock_mock.side_effect = [sock1, sock2]
select_mock.side_effect = [
([sock1], [], []),
([sock2], [], []),
]
lldp_info = netutils.get_lldp_info(interface_names)
self.assertEqual(expected_lldp, lldp_info)
sock1.bind.assert_called_with(('eth0', netutils.LLDP_ETHERTYPE))
sock2.bind.assert_called_with(('eth1', netutils.LLDP_ETHERTYPE))
sock1.recv.assert_called_with(1600)
sock2.recv.assert_called_with(1600)
self.assertEqual(1, sock1.close.call_count)
self.assertEqual(1, sock2.close.call_count)
# 2 interfaces, 2 calls to enter promiscuous mode, 1 to leave
self.assertEqual(6, fcntl_mock.call_count)
expected_calls = [
mock.call([sock1, sock2], [], [], cfg.CONF.lldp_timeout),
mock.call([sock2], [], [], cfg.CONF.lldp_timeout),
]
self.assertEqual(expected_calls, select_mock.call_args_list)
@mock.patch('fcntl.ioctl', autospec=True)
@mock.patch('select.select', autospec=True)
@mock.patch('socket.socket', autospec=socket_socket_sig)
def test_get_lldp_info_one_empty_interface(self, sock_mock, select_mock,
fcntl_mock):
expected_lldp = {
'eth1': [],
'eth0': [
(0, b''),
(1, b'\x04\x88Z\x92\xecTY'),
(2, b'\x05Ethernet1/18'),
(3, b'\x00x')]
}
interface_names = ['eth0', 'eth1']
sock1 = mock.Mock()
sock1.recv.return_value = FAKE_LLDP_PACKET
sock1.fileno.return_value = 4
sock2 = mock.Mock()
sock2.fileno.return_value = 5
sock_mock.side_effect = [sock1, sock2]
select_mock.side_effect = [
([sock1], [], []),
([], [], []),
]
lldp_info = netutils.get_lldp_info(interface_names)
self.assertEqual(expected_lldp, lldp_info)
sock1.bind.assert_called_with(('eth0', netutils.LLDP_ETHERTYPE))
sock2.bind.assert_called_with(('eth1', netutils.LLDP_ETHERTYPE))
sock1.recv.assert_called_with(1600)
sock2.recv.not_called()
self.assertEqual(1, sock1.close.call_count)
self.assertEqual(1, sock2.close.call_count)
# 2 interfaces, 2 calls to enter promiscuous mode, 1 to leave
self.assertEqual(6, fcntl_mock.call_count)
@mock.patch('fcntl.ioctl', autospec=True)
@mock.patch('select.select', autospec=True)
@mock.patch('socket.socket', autospec=socket_socket_sig)
def test_get_lldp_info_empty(self, sock_mock, select_mock, fcntl_mock):
expected_lldp = {
'eth1': [],
'eth0': []
}
interface_names = ['eth0', 'eth1']
sock1 = mock.Mock()
sock1.fileno.return_value = 4
sock2 = mock.Mock()
sock2.fileno.return_value = 5
sock_mock.side_effect = [sock1, sock2]
select_mock.side_effect = [
([], [], []),
([], [], [])
]
lldp_info = netutils.get_lldp_info(interface_names)
self.assertEqual(expected_lldp, lldp_info)
sock1.bind.assert_called_with(('eth0', netutils.LLDP_ETHERTYPE))
sock2.bind.assert_called_with(('eth1', netutils.LLDP_ETHERTYPE))
sock1.recv.not_called()
sock2.recv.not_called()
self.assertEqual(1, sock1.close.call_count)
self.assertEqual(1, sock2.close.call_count)
# 2 interfaces * (2 calls to enter promiscuous mode + 1 to leave) = 6
self.assertEqual(6, fcntl_mock.call_count)
@mock.patch('fcntl.ioctl', autospec=True)
@mock.patch('select.select', autospec=True)
@mock.patch('socket.socket', autospec=socket_socket_sig)
def test_get_lldp_info_malformed(self, sock_mock, select_mock, fcntl_mock):
expected_lldp = {
'eth1': [],
'eth0': [],
}
interface_names = ['eth0', 'eth1']
sock1 = mock.Mock()
sock1.recv.return_value = b'123456789012345' # odd size
sock1.fileno.return_value = 4
sock2 = mock.Mock()
sock2.recv.return_value = b'1234' # too small
sock2.fileno.return_value = 5
sock_mock.side_effect = [sock1, sock2]
select_mock.side_effect = [
([sock1], [], []),
([sock2], [], []),
]
lldp_info = netutils.get_lldp_info(interface_names)
self.assertEqual(expected_lldp, lldp_info)
sock1.bind.assert_called_with(('eth0', netutils.LLDP_ETHERTYPE))
sock2.bind.assert_called_with(('eth1', netutils.LLDP_ETHERTYPE))
sock1.recv.assert_called_with(1600)
sock2.recv.assert_called_with(1600)
self.assertEqual(1, sock1.close.call_count)
self.assertEqual(1, sock2.close.call_count)
# 2 interfaces, 2 calls to enter promiscuous mode, 1 to leave
self.assertEqual(6, fcntl_mock.call_count)
expected_calls = [
mock.call([sock1, sock2], [], [], cfg.CONF.lldp_timeout),
mock.call([sock2], [], [], cfg.CONF.lldp_timeout),
]
self.assertEqual(expected_calls, select_mock.call_args_list)
@mock.patch('fcntl.ioctl', autospec=True)
@mock.patch('socket.socket', autospec=socket_socket_sig)
def test_raw_promiscuous_sockets(self, sock_mock, fcntl_mock):
interfaces = ['eth0', 'ens9f1']
protocol = 3
sock1 = mock.Mock()
sock2 = mock.Mock()
sock_mock.side_effect = [sock1, sock2]
with netutils.RawPromiscuousSockets(interfaces, protocol) as sockets:
# 2 interfaces, 1 get, 1 set call each
self.assertEqual(4, fcntl_mock.call_count)
self.assertEqual([('eth0', sock1), ('ens9f1', sock2)], sockets)
sock1.bind.assert_called_once_with(('eth0', protocol))
sock2.bind.assert_called_once_with(('ens9f1', protocol))
self.assertEqual(6, fcntl_mock.call_count)
sock1.close.assert_called_once_with()
sock2.close.assert_called_once_with()
@mock.patch('fcntl.ioctl', autospec=True)
@mock.patch('socket.socket', autospec=socket_socket_sig)
def test_raw_promiscuous_sockets_bind_fail(self, sock_mock, fcntl_mock):
interfaces = ['eth0', 'ens9f1']
protocol = 3
sock1 = mock.Mock()
sock2 = mock.Mock()
sock_mock.side_effect = [sock1, sock2]
sock2.bind.side_effect = RuntimeError()
def _run_with_bind_fail():
with netutils.RawPromiscuousSockets(interfaces, protocol):
self.fail('Unreachable code')
self.assertRaises(RuntimeError, _run_with_bind_fail)
sock1.bind.assert_called_once_with(('eth0', protocol))
sock2.bind.assert_called_once_with(('ens9f1', protocol))
self.assertEqual(6, fcntl_mock.call_count)
sock1.close.assert_called_once_with()
sock2.close.assert_called_once_with()
@mock.patch('fcntl.ioctl', autospec=True)
@mock.patch('socket.socket', autospec=socket_socket_sig)
def test_raw_promiscuous_sockets_exception(self, sock_mock, fcntl_mock):
interfaces = ['eth0', 'ens9f1']
protocol = 3
sock1 = mock.Mock()
sock2 = mock.Mock()
sock_mock.side_effect = [sock1, sock2]
def _run_with_exception():
with netutils.RawPromiscuousSockets(interfaces, protocol):
raise RuntimeError()
self.assertRaises(RuntimeError, _run_with_exception)
sock1.bind.assert_called_once_with(('eth0', protocol))
sock2.bind.assert_called_once_with(('ens9f1', protocol))
self.assertEqual(6, fcntl_mock.call_count)
sock1.close.assert_called_once_with()
sock2.close.assert_called_once_with()
def test_wrap_ipv6(self):
res = netutils.wrap_ipv6('1:2::3:4')
self.assertEqual('[1:2::3:4]', res)
def test_wrap_ipv6_with_ipv4(self):
res = netutils.wrap_ipv6('1.2.3.4')
self.assertEqual('1.2.3.4', res)
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