path: root/cloudinit/net/tests/test_init.py

# This file is part of cloud-init. See LICENSE file for license information.

import copy
import errno
import httpretty
import os
import requests
import textwrap
from unittest import mock

import cloudinit.net as net
from cloudinit.util import ensure_file, write_file, ProcessExecutionError
from cloudinit.tests.helpers import CiTestCase, HttprettyTestCase
from cloudinit import safeyaml as yaml


class TestSysDevPath(CiTestCase):

    def test_sys_dev_path(self):
        """sys_dev_path returns a path under SYS_CLASS_NET for a device."""
        dev = 'something'
        path = 'attribute'
        expected = net.SYS_CLASS_NET + dev + '/' + path
        self.assertEqual(expected, net.sys_dev_path(dev, path))

    def test_sys_dev_path_without_path(self):
        """When path param isn't provided it defaults to empty string."""
        dev = 'something'
        expected = net.SYS_CLASS_NET + dev + '/'
        self.assertEqual(expected, net.sys_dev_path(dev))


class TestReadSysNet(CiTestCase):
    with_logs = True

    def setUp(self):
        super(TestReadSysNet, self).setUp()
        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
        self.m_sys_path = sys_mock.start()
        self.sysdir = self.tmp_dir() + '/'
        self.m_sys_path.return_value = self.sysdir
        self.addCleanup(sys_mock.stop)

    def test_read_sys_net_strips_contents_of_sys_path(self):
        """read_sys_net strips whitespace from the contents of a sys file."""
        content = 'some stuff with trailing whitespace\t\r\n'
        write_file(os.path.join(self.sysdir, 'dev', 'attr'), content)
        self.assertEqual(content.strip(), net.read_sys_net('dev', 'attr'))

    def test_read_sys_net_reraises_oserror(self):
        """read_sys_net raises OSError/IOError when file doesn't exist."""
        # Non-specific Exception because versions of python OSError vs IOError.
        with self.assertRaises(Exception) as context_manager:  # noqa: H202
            net.read_sys_net('dev', 'attr')
        error = context_manager.exception
        self.assertIn('No such file or directory', str(error))

    def test_read_sys_net_handles_error_with_on_enoent(self):
        """read_sys_net handles OSError/IOError with on_enoent if provided."""
        handled_errors = []

        def on_enoent(e):
            handled_errors.append(e)

        net.read_sys_net('dev', 'attr', on_enoent=on_enoent)
        error = handled_errors[0]
        self.assertIsInstance(error, Exception)
        self.assertIn('No such file or directory', str(error))

    def test_read_sys_net_translates_content(self):
        """read_sys_net translates content when translate dict is provided."""
        content = "you're welcome\n"
        write_file(os.path.join(self.sysdir, 'dev', 'attr'), content)
        translate = {"you're welcome": 'de nada'}
        self.assertEqual(
            'de nada',
            net.read_sys_net('dev', 'attr', translate=translate))

    def test_read_sys_net_errors_on_translation_failures(self):
        """read_sys_net raises a KeyError and logs details on failure."""
        content = "you're welcome\n"
        write_file(os.path.join(self.sysdir, 'dev', 'attr'), content)
        with self.assertRaises(KeyError) as context_manager:
            net.read_sys_net('dev', 'attr', translate={})
        error = context_manager.exception
        self.assertEqual('"you\'re welcome"', str(error))
        self.assertIn(
            "Found unexpected (not translatable) value 'you're welcome' in "
            "'{0}dev/attr".format(self.sysdir),
            self.logs.getvalue())

    def test_read_sys_net_handles_handles_with_onkeyerror(self):
        """read_sys_net handles translation errors calling on_keyerror."""
        content = "you're welcome\n"
        write_file(os.path.join(self.sysdir, 'dev', 'attr'), content)
        handled_errors = []

        def on_keyerror(e):
            handled_errors.append(e)

        net.read_sys_net('dev', 'attr', translate={}, on_keyerror=on_keyerror)
        error = handled_errors[0]
        self.assertIsInstance(error, KeyError)
        self.assertEqual('"you\'re welcome"', str(error))

    def test_read_sys_net_safe_false_on_translate_failure(self):
        """read_sys_net_safe returns False on translation failures."""
        content = "you're welcome\n"
        write_file(os.path.join(self.sysdir, 'dev', 'attr'), content)
        self.assertFalse(net.read_sys_net_safe('dev', 'attr', translate={}))

    def test_read_sys_net_safe_returns_false_on_noent_failure(self):
        """read_sys_net_safe returns False on file not found failures."""
        self.assertFalse(net.read_sys_net_safe('dev', 'attr'))

    def test_read_sys_net_int_returns_none_on_error(self):
        """read_sys_net_safe returns None on failures."""
        self.assertFalse(net.read_sys_net_int('dev', 'attr'))

    def test_read_sys_net_int_returns_none_on_valueerror(self):
        """read_sys_net_safe returns None when content is not an int."""
        write_file(os.path.join(self.sysdir, 'dev', 'attr'), 'NOTINT\n')
        self.assertFalse(net.read_sys_net_int('dev', 'attr'))

    def test_read_sys_net_int_returns_integer_from_content(self):
        """read_sys_net_safe returns None on failures."""
        write_file(os.path.join(self.sysdir, 'dev', 'attr'), '1\n')
        self.assertEqual(1, net.read_sys_net_int('dev', 'attr'))

    def test_is_up_true(self):
        """is_up is True if sys/net/devname/operstate is 'up' or 'unknown'."""
        for state in ['up', 'unknown']:
            write_file(os.path.join(self.sysdir, 'eth0', 'operstate'), state)
            self.assertTrue(net.is_up('eth0'))

    def test_is_up_false(self):
        """is_up is False if sys/net/devname/operstate is 'down' or invalid."""
        for state in ['down', 'incomprehensible']:
            write_file(os.path.join(self.sysdir, 'eth0', 'operstate'), state)
            self.assertFalse(net.is_up('eth0'))

    def test_is_wireless(self):
        """is_wireless is True when /sys/net/devname/wireless exists."""
        self.assertFalse(net.is_wireless('eth0'))
        ensure_file(os.path.join(self.sysdir, 'eth0', 'wireless'))
        self.assertTrue(net.is_wireless('eth0'))

    def test_is_bridge(self):
        """is_bridge is True when /sys/net/devname/bridge exists."""
        self.assertFalse(net.is_bridge('eth0'))
        ensure_file(os.path.join(self.sysdir, 'eth0', 'bridge'))
        self.assertTrue(net.is_bridge('eth0'))

    def test_is_bond(self):
        """is_bond is True when /sys/net/devname/bonding exists."""
        self.assertFalse(net.is_bond('eth0'))
        ensure_file(os.path.join(self.sysdir, 'eth0', 'bonding'))
        self.assertTrue(net.is_bond('eth0'))

    def test_get_master(self):
        """get_master returns the path when /sys/net/devname/master exists."""
        self.assertIsNone(net.get_master('enP1s1'))
        master_path = os.path.join(self.sysdir, 'enP1s1', 'master')
        ensure_file(master_path)
        self.assertEqual(master_path, net.get_master('enP1s1'))

    def test_master_is_bridge_or_bond(self):
        bridge_mac = 'aa:bb:cc:aa:bb:cc'
        bond_mac = 'cc:bb:aa:cc:bb:aa'

        # No master => False
        write_file(os.path.join(self.sysdir, 'eth1', 'address'), bridge_mac)
        write_file(os.path.join(self.sysdir, 'eth2', 'address'), bond_mac)

        self.assertFalse(net.master_is_bridge_or_bond('eth1'))
        self.assertFalse(net.master_is_bridge_or_bond('eth2'))

        # masters without bridge/bonding => False
        write_file(os.path.join(self.sysdir, 'br0', 'address'), bridge_mac)
        write_file(os.path.join(self.sysdir, 'bond0', 'address'), bond_mac)

        os.symlink('../br0', os.path.join(self.sysdir, 'eth1', 'master'))
        os.symlink('../bond0', os.path.join(self.sysdir, 'eth2', 'master'))

        self.assertFalse(net.master_is_bridge_or_bond('eth1'))
        self.assertFalse(net.master_is_bridge_or_bond('eth2'))

        # masters with bridge/bonding => True
        write_file(os.path.join(self.sysdir, 'br0', 'bridge'), '')
        write_file(os.path.join(self.sysdir, 'bond0', 'bonding'), '')

        self.assertTrue(net.master_is_bridge_or_bond('eth1'))
        self.assertTrue(net.master_is_bridge_or_bond('eth2'))

    def test_is_vlan(self):
        """is_vlan is True when /sys/net/devname/uevent has DEVTYPE=vlan."""
        ensure_file(os.path.join(self.sysdir, 'eth0', 'uevent'))
        self.assertFalse(net.is_vlan('eth0'))
        content = 'junk\nDEVTYPE=vlan\njunk\n'
        write_file(os.path.join(self.sysdir, 'eth0', 'uevent'), content)
        self.assertTrue(net.is_vlan('eth0'))

    def test_is_connected_when_physically_connected(self):
        """is_connected is True when /sys/net/devname/iflink reports 2."""
        self.assertFalse(net.is_connected('eth0'))
        write_file(os.path.join(self.sysdir, 'eth0', 'iflink'), "2")
        self.assertTrue(net.is_connected('eth0'))

    def test_is_connected_when_wireless_and_carrier_active(self):
        """is_connected is True if wireless /sys/net/devname/carrier is 1."""
        self.assertFalse(net.is_connected('eth0'))
        ensure_file(os.path.join(self.sysdir, 'eth0', 'wireless'))
        self.assertFalse(net.is_connected('eth0'))
        write_file(os.path.join(self.sysdir, 'eth0', 'carrier'), "1")
        self.assertTrue(net.is_connected('eth0'))

    def test_is_physical(self):
        """is_physical is True when /sys/net/devname/device exists."""
        self.assertFalse(net.is_physical('eth0'))
        ensure_file(os.path.join(self.sysdir, 'eth0', 'device'))
        self.assertTrue(net.is_physical('eth0'))

    def test_is_present(self):
        """is_present is True when /sys/net/devname exists."""
        self.assertFalse(net.is_present('eth0'))
        ensure_file(os.path.join(self.sysdir, 'eth0', 'device'))
        self.assertTrue(net.is_present('eth0'))


class TestGenerateFallbackConfig(CiTestCase):

    def setUp(self):
        super(TestGenerateFallbackConfig, self).setUp()
        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
        self.m_sys_path = sys_mock.start()
        self.sysdir = self.tmp_dir() + '/'
        self.m_sys_path.return_value = self.sysdir
        self.addCleanup(sys_mock.stop)
        self.add_patch('cloudinit.net.util.is_container', 'm_is_container',
                       return_value=False)
        self.add_patch('cloudinit.net.util.udevadm_settle', 'm_settle')
        self.add_patch('cloudinit.net.is_netfailover', 'm_netfail',
                       return_value=False)
        self.add_patch('cloudinit.net.is_netfail_master', 'm_netfail_master',
                       return_value=False)

    def test_generate_fallback_finds_connected_eth_with_mac(self):
        """generate_fallback_config finds any connected device with a mac."""
        write_file(os.path.join(self.sysdir, 'eth0', 'carrier'), '1')
        write_file(os.path.join(self.sysdir, 'eth1', 'carrier'), '1')
        mac = 'aa:bb:cc:aa:bb:cc'
        write_file(os.path.join(self.sysdir, 'eth1', 'address'), mac)
        expected = {
            'ethernets': {'eth1': {'match': {'macaddress': mac},
                                   'dhcp4': True, 'set-name': 'eth1'}},
            'version': 2}
        self.assertEqual(expected, net.generate_fallback_config())

    def test_generate_fallback_finds_dormant_eth_with_mac(self):
        """generate_fallback_config finds any dormant device with a mac."""
        write_file(os.path.join(self.sysdir, 'eth0', 'dormant'), '1')
        mac = 'aa:bb:cc:aa:bb:cc'
        write_file(os.path.join(self.sysdir, 'eth0', 'address'), mac)
        expected = {
            'ethernets': {'eth0': {'match': {'macaddress': mac}, 'dhcp4': True,
                                   'set-name': 'eth0'}},
            'version': 2}
        self.assertEqual(expected, net.generate_fallback_config())

    def test_generate_fallback_finds_eth_by_operstate(self):
        """generate_fallback_config finds any dormant device with a mac."""
        mac = 'aa:bb:cc:aa:bb:cc'
        write_file(os.path.join(self.sysdir, 'eth0', 'address'), mac)
        expected = {
            'ethernets': {
                'eth0': {'dhcp4': True, 'match': {'macaddress': mac},
                         'set-name': 'eth0'}},
            'version': 2}
        valid_operstates = ['dormant', 'down', 'lowerlayerdown', 'unknown']
        for state in valid_operstates:
            write_file(os.path.join(self.sysdir, 'eth0', 'operstate'), state)
            self.assertEqual(expected, net.generate_fallback_config())
        write_file(os.path.join(self.sysdir, 'eth0', 'operstate'), 'noworky')
        self.assertIsNone(net.generate_fallback_config())

    def test_generate_fallback_config_skips_veth(self):
        """generate_fallback_config will skip any veth interfaces."""
        # A connected veth which gets ignored
        write_file(os.path.join(self.sysdir, 'veth0', 'carrier'), '1')
        self.assertIsNone(net.generate_fallback_config())

    def test_generate_fallback_config_skips_bridges(self):
        """generate_fallback_config will skip any bridges interfaces."""
        # A connected veth which gets ignored
        write_file(os.path.join(self.sysdir, 'eth0', 'carrier'), '1')
        mac = 'aa:bb:cc:aa:bb:cc'
        write_file(os.path.join(self.sysdir, 'eth0', 'address'), mac)
        ensure_file(os.path.join(self.sysdir, 'eth0', 'bridge'))
        self.assertIsNone(net.generate_fallback_config())

    def test_generate_fallback_config_skips_bonds(self):
        """generate_fallback_config will skip any bonded interfaces."""
        # A connected veth which gets ignored
        write_file(os.path.join(self.sysdir, 'eth0', 'carrier'), '1')
        mac = 'aa:bb:cc:aa:bb:cc'
        write_file(os.path.join(self.sysdir, 'eth0', 'address'), mac)
        ensure_file(os.path.join(self.sysdir, 'eth0', 'bonding'))
        self.assertIsNone(net.generate_fallback_config())

    def test_generate_fallback_config_skips_netfail_devs(self):
        """gen_fallback_config ignores netfail primary,sby no mac on master."""
        mac = 'aa:bb:cc:aa:bb:cc'  # netfailover devs share the same mac
        for iface in ['ens3', 'ens3sby', 'enP0s1f3']:
            write_file(os.path.join(self.sysdir, iface, 'carrier'), '1')
            write_file(
                os.path.join(self.sysdir, iface, 'addr_assign_type'), '0')
            write_file(
                os.path.join(self.sysdir, iface, 'address'), mac)

        def is_netfail(iface, _driver=None):
            # ens3 is the master
            if iface == 'ens3':
                return False
            return True
        self.m_netfail.side_effect = is_netfail

        def is_netfail_master(iface, _driver=None):
            # ens3 is the master
            if iface == 'ens3':
                return True
            return False
        self.m_netfail_master.side_effect = is_netfail_master
        expected = {
            'ethernets': {
                'ens3': {'dhcp4': True, 'match': {'name': 'ens3'},
                         'set-name': 'ens3'}},
            'version': 2}
        result = net.generate_fallback_config()
        self.assertEqual(expected, result)


class TestNetFindFallBackNic(CiTestCase):

    def setUp(self):
        super(TestNetFindFallBackNic, self).setUp()
        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
        self.m_sys_path = sys_mock.start()
        self.sysdir = self.tmp_dir() + '/'
        self.m_sys_path.return_value = self.sysdir
        self.addCleanup(sys_mock.stop)
        self.add_patch('cloudinit.net.util.is_container', 'm_is_container',
                       return_value=False)
        self.add_patch('cloudinit.net.util.udevadm_settle', 'm_settle')

    def test_generate_fallback_finds_first_connected_eth_with_mac(self):
        """find_fallback_nic finds any connected device with a mac."""
        write_file(os.path.join(self.sysdir, 'eth0', 'carrier'), '1')
        write_file(os.path.join(self.sysdir, 'eth1', 'carrier'), '1')
        mac = 'aa:bb:cc:aa:bb:cc'
        write_file(os.path.join(self.sysdir, 'eth1', 'address'), mac)
        self.assertEqual('eth1', net.find_fallback_nic())


class TestGetDeviceList(CiTestCase):

    def setUp(self):
        super(TestGetDeviceList, self).setUp()
        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
        self.m_sys_path = sys_mock.start()
        self.sysdir = self.tmp_dir() + '/'
        self.m_sys_path.return_value = self.sysdir
        self.addCleanup(sys_mock.stop)

    def test_get_devicelist_raise_oserror(self):
        """get_devicelist raise any non-ENOENT OSerror."""
        error = OSError('Can not do it')
        error.errno = errno.EPERM  # Set non-ENOENT
        self.m_sys_path.side_effect = error
        with self.assertRaises(OSError) as context_manager:
            net.get_devicelist()
        exception = context_manager.exception
        self.assertEqual('Can not do it', str(exception))

    def test_get_devicelist_empty_without_sys_net(self):
        """get_devicelist returns empty list when missing SYS_CLASS_NET."""
        self.m_sys_path.return_value = 'idontexist'
        self.assertEqual([], net.get_devicelist())

    def test_get_devicelist_empty_with_no_devices_in_sys_net(self):
        """get_devicelist returns empty directoty listing for SYS_CLASS_NET."""
        self.assertEqual([], net.get_devicelist())

    def test_get_devicelist_lists_any_subdirectories_in_sys_net(self):
        """get_devicelist returns a directory listing for SYS_CLASS_NET."""
        write_file(os.path.join(self.sysdir, 'eth0', 'operstate'), 'up')
        write_file(os.path.join(self.sysdir, 'eth1', 'operstate'), 'up')
        self.assertItemsEqual(['eth0', 'eth1'], net.get_devicelist())


class TestGetInterfaceMAC(CiTestCase):

    def setUp(self):
        super(TestGetInterfaceMAC, self).setUp()
        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
        self.m_sys_path = sys_mock.start()
        self.sysdir = self.tmp_dir() + '/'
        self.m_sys_path.return_value = self.sysdir
        self.addCleanup(sys_mock.stop)

    def test_get_interface_mac_false_with_no_mac(self):
        """get_device_list returns False when no mac is reported."""
        ensure_file(os.path.join(self.sysdir, 'eth0', 'bonding'))
        mac_path = os.path.join(self.sysdir, 'eth0', 'address')
        self.assertFalse(os.path.exists(mac_path))
        self.assertFalse(net.get_interface_mac('eth0'))

    def test_get_interface_mac(self):
        """get_interfaces returns the mac from SYS_CLASS_NET/dev/address."""
        mac = 'aa:bb:cc:aa:bb:cc'
        write_file(os.path.join(self.sysdir, 'eth1', 'address'), mac)
        self.assertEqual(mac, net.get_interface_mac('eth1'))

    def test_get_interface_mac_grabs_bonding_address(self):
        """get_interfaces returns the source device mac for bonded devices."""
        source_dev_mac = 'aa:bb:cc:aa:bb:cc'
        bonded_mac = 'dd:ee:ff:dd:ee:ff'
        write_file(os.path.join(self.sysdir, 'eth1', 'address'), bonded_mac)
        write_file(
            os.path.join(self.sysdir, 'eth1', 'bonding_slave', 'perm_hwaddr'),
            source_dev_mac)
        self.assertEqual(source_dev_mac, net.get_interface_mac('eth1'))

    def test_get_interfaces_empty_list_without_sys_net(self):
        """get_interfaces returns an empty list when missing SYS_CLASS_NET."""
        self.m_sys_path.return_value = 'idontexist'
        self.assertEqual([], net.get_interfaces())

    def test_get_interfaces_by_mac_skips_empty_mac(self):
        """Ignore 00:00:00:00:00:00 addresses from get_interfaces_by_mac."""
        empty_mac = '00:00:00:00:00:00'
        mac = 'aa:bb:cc:aa:bb:cc'
        write_file(os.path.join(self.sysdir, 'eth1', 'address'), empty_mac)
        write_file(os.path.join(self.sysdir, 'eth1', 'addr_assign_type'), '0')
        write_file(os.path.join(self.sysdir, 'eth2', 'addr_assign_type'), '0')
        write_file(os.path.join(self.sysdir, 'eth2', 'address'), mac)
        expected = [('eth2', 'aa:bb:cc:aa:bb:cc', None, None)]
        self.assertEqual(expected, net.get_interfaces())

    def test_get_interfaces_by_mac_skips_missing_mac(self):
        """Ignore interfaces without an address from get_interfaces_by_mac."""
        write_file(os.path.join(self.sysdir, 'eth1', 'addr_assign_type'), '0')
        address_path = os.path.join(self.sysdir, 'eth1', 'address')
        self.assertFalse(os.path.exists(address_path))
        mac = 'aa:bb:cc:aa:bb:cc'
        write_file(os.path.join(self.sysdir, 'eth2', 'addr_assign_type'), '0')
        write_file(os.path.join(self.sysdir, 'eth2', 'address'), mac)
        expected = [('eth2', 'aa:bb:cc:aa:bb:cc', None, None)]
        self.assertEqual(expected, net.get_interfaces())

    def test_get_interfaces_by_mac_skips_master_devs(self):
        """Ignore interfaces with a master device which would have dup mac."""
        mac1 = mac2 = 'aa:bb:cc:aa:bb:cc'
        write_file(os.path.join(self.sysdir, 'eth1', 'addr_assign_type'), '0')
        write_file(os.path.join(self.sysdir, 'eth1', 'address'), mac1)
        write_file(os.path.join(self.sysdir, 'eth1', 'master'), "blah")
        write_file(os.path.join(self.sysdir, 'eth2', 'addr_assign_type'), '0')
        write_file(os.path.join(self.sysdir, 'eth2', 'address'), mac2)
        expected = [('eth2', mac2, None, None)]
        self.assertEqual(expected, net.get_interfaces())

    @mock.patch('cloudinit.net.is_netfailover')
    def test_get_interfaces_by_mac_skips_netfailvoer(self, m_netfail):
        """Ignore interfaces if netfailover primary or standby."""
        mac = 'aa:bb:cc:aa:bb:cc'  # netfailover devs share the same mac
        for iface in ['ens3', 'ens3sby', 'enP0s1f3']:
            write_file(
                os.path.join(self.sysdir, iface, 'addr_assign_type'), '0')
            write_file(
                os.path.join(self.sysdir, iface, 'address'), mac)

        def is_netfail(iface, _driver=None):
            # ens3 is the master
            if iface == 'ens3':
                return False
            else:
                return True
        m_netfail.side_effect = is_netfail
        expected = [('ens3', mac, None, None)]
        self.assertEqual(expected, net.get_interfaces())

    def test_get_interfaces_does_not_skip_phys_members_of_bridges_and_bonds(
        self
    ):
        bridge_mac = 'aa:bb:cc:aa:bb:cc'
        bond_mac = 'cc:bb:aa:cc:bb:aa'
        write_file(os.path.join(self.sysdir, 'br0', 'address'), bridge_mac)
        write_file(os.path.join(self.sysdir, 'br0', 'bridge'), '')

        write_file(os.path.join(self.sysdir, 'bond0', 'address'), bond_mac)
        write_file(os.path.join(self.sysdir, 'bond0', 'bonding'), '')

        write_file(os.path.join(self.sysdir, 'eth1', 'address'), bridge_mac)
        os.symlink('../br0', os.path.join(self.sysdir, 'eth1', 'master'))

        write_file(os.path.join(self.sysdir, 'eth2', 'address'), bond_mac)
        os.symlink('../bond0', os.path.join(self.sysdir, 'eth2', 'master'))

        interface_names = [interface[0] for interface in net.get_interfaces()]
        self.assertEqual(['eth1', 'eth2'], sorted(interface_names))


class TestInterfaceHasOwnMAC(CiTestCase):

    def setUp(self):
        super(TestInterfaceHasOwnMAC, self).setUp()
        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
        self.m_sys_path = sys_mock.start()
        self.sysdir = self.tmp_dir() + '/'
        self.m_sys_path.return_value = self.sysdir
        self.addCleanup(sys_mock.stop)

    def test_interface_has_own_mac_false_when_stolen(self):
        """Return False from interface_has_own_mac when address is stolen."""
        write_file(os.path.join(self.sysdir, 'eth1', 'addr_assign_type'), '2')
        self.assertFalse(net.interface_has_own_mac('eth1'))

    def test_interface_has_own_mac_true_when_not_stolen(self):
        """Return False from interface_has_own_mac when mac isn't stolen."""
        valid_assign_types = ['0', '1', '3']
        assign_path = os.path.join(self.sysdir, 'eth1', 'addr_assign_type')
        for _type in valid_assign_types:
            write_file(assign_path, _type)
            self.assertTrue(net.interface_has_own_mac('eth1'))

    def test_interface_has_own_mac_strict_errors_on_absent_assign_type(self):
        """When addr_assign_type is absent, interface_has_own_mac errors."""
        with self.assertRaises(ValueError):
            net.interface_has_own_mac('eth1', strict=True)


@mock.patch('cloudinit.net.util.subp')
class TestEphemeralIPV4Network(CiTestCase):

    with_logs = True

    def setUp(self):
        super(TestEphemeralIPV4Network, self).setUp()
        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
        self.m_sys_path = sys_mock.start()
        self.sysdir = self.tmp_dir() + '/'
        self.m_sys_path.return_value = self.sysdir
        self.addCleanup(sys_mock.stop)

    def test_ephemeral_ipv4_network_errors_on_missing_params(self, m_subp):
        """No required params for EphemeralIPv4Network can be None."""
        required_params = {
            'interface': 'eth0', 'ip': '192.168.2.2',
            'prefix_or_mask': '255.255.255.0', 'broadcast': '192.168.2.255'}
        for key in required_params.keys():
            params = copy.deepcopy(required_params)
            params[key] = None
            with self.assertRaises(ValueError) as context_manager:
                net.EphemeralIPv4Network(**params)
            error = context_manager.exception
            self.assertIn('Cannot init network on', str(error))
            self.assertEqual(0, m_subp.call_count)

    def test_ephemeral_ipv4_network_errors_invalid_mask_prefix(self, m_subp):
        """Raise an error when prefix_or_mask is not a netmask or prefix."""
        params = {
            'interface': 'eth0', 'ip': '192.168.2.2',
            'broadcast': '192.168.2.255'}
        invalid_masks = ('invalid', 'invalid.', '123.123.123')
        for error_val in invalid_masks:
            params['prefix_or_mask'] = error_val
            with self.assertRaises(ValueError) as context_manager:
                with net.EphemeralIPv4Network(**params):
                    pass
            error = context_manager.exception
            self.assertIn('Cannot setup network: netmask', str(error))
            self.assertEqual(0, m_subp.call_count)

    def test_ephemeral_ipv4_network_performs_teardown(self, m_subp):
        """EphemeralIPv4Network performs teardown on the device if setup."""
        expected_setup_calls = [
            mock.call(
                ['ip', '-family', 'inet', 'addr', 'add', '192.168.2.2/24',
                 'broadcast', '192.168.2.255', 'dev', 'eth0'],
                capture=True, update_env={'LANG': 'C'}),
            mock.call(
                ['ip', '-family', 'inet', 'link', 'set', 'dev', 'eth0', 'up'],
                capture=True)]
        expected_teardown_calls = [
            mock.call(
                ['ip', '-family', 'inet', 'link', 'set', 'dev', 'eth0',
                 'down'], capture=True),
            mock.call(
                ['ip', '-family', 'inet', 'addr', 'del', '192.168.2.2/24',
                 'dev', 'eth0'], capture=True)]
        params = {
            'interface': 'eth0', 'ip': '192.168.2.2',
            'prefix_or_mask': '255.255.255.0', 'broadcast': '192.168.2.255'}
        with net.EphemeralIPv4Network(**params):
            self.assertEqual(expected_setup_calls, m_subp.call_args_list)
        m_subp.assert_has_calls(expected_teardown_calls)

    @mock.patch('cloudinit.net.readurl')
    def test_ephemeral_ipv4_no_network_if_url_connectivity(
            self, m_readurl, m_subp):
        """No network setup is performed if we can successfully connect to
        connectivity_url."""
        params = {
            'interface': 'eth0', 'ip': '192.168.2.2',
            'prefix_or_mask': '255.255.255.0', 'broadcast': '192.168.2.255',
            'connectivity_url': 'http://example.org/index.html'}

        with net.EphemeralIPv4Network(**params):
            self.assertEqual([mock.call('http://example.org/index.html',
                                        timeout=5)], m_readurl.call_args_list)
        # Ensure that no teardown happens:
        m_subp.assert_has_calls([])

    def test_ephemeral_ipv4_network_noop_when_configured(self, m_subp):
        """EphemeralIPv4Network handles exception when address is setup.

        It performs no cleanup as the interface was already setup.
        """
        params = {
            'interface': 'eth0', 'ip': '192.168.2.2',
            'prefix_or_mask': '255.255.255.0', 'broadcast': '192.168.2.255'}
        m_subp.side_effect = ProcessExecutionError(
            '', 'RTNETLINK answers: File exists', 2)
        expected_calls = [
            mock.call(
                ['ip', '-family', 'inet', 'addr', 'add', '192.168.2.2/24',
                 'broadcast', '192.168.2.255', 'dev', 'eth0'],
                capture=True, update_env={'LANG': 'C'})]
        with net.EphemeralIPv4Network(**params):
            pass
        self.assertEqual(expected_calls, m_subp.call_args_list)
        self.assertIn(
            'Skip ephemeral network setup, eth0 already has address',
            self.logs.getvalue())

    def test_ephemeral_ipv4_network_with_prefix(self, m_subp):
        """EphemeralIPv4Network takes a valid prefix to setup the network."""
        params = {
            'interface': 'eth0', 'ip': '192.168.2.2',
            'prefix_or_mask': '24', 'broadcast': '192.168.2.255'}
        for prefix_val in ['24', 16]:  # prefix can be int or string
            params['prefix_or_mask'] = prefix_val
            with net.EphemeralIPv4Network(**params):
                pass
        m_subp.assert_has_calls([mock.call(
            ['ip', '-family', 'inet', 'addr', 'add', '192.168.2.2/24',
             'broadcast', '192.168.2.255', 'dev', 'eth0'],
            capture=True, update_env={'LANG': 'C'})])
        m_subp.assert_has_calls([mock.call(
            ['ip', '-family', 'inet', 'addr', 'add', '192.168.2.2/16',
             'broadcast', '192.168.2.255', 'dev', 'eth0'],
            capture=True, update_env={'LANG': 'C'})])

    def test_ephemeral_ipv4_network_with_new_default_route(self, m_subp):
        """Add the route when router is set and no default route exists."""
        params = {
            'interface': 'eth0', 'ip': '192.168.2.2',
            'prefix_or_mask': '255.255.255.0', 'broadcast': '192.168.2.255',
            'router': '192.168.2.1'}
        m_subp.return_value = '', ''  # Empty response from ip route gw check
        expected_setup_calls = [
            mock.call(
                ['ip', '-family', 'inet', 'addr', 'add', '192.168.2.2/24',
                 'broadcast', '192.168.2.255', 'dev', 'eth0'],
                capture=True, update_env={'LANG': 'C'}),
            mock.call(
                ['ip', '-family', 'inet', 'link', 'set', 'dev', 'eth0', 'up'],
                capture=True),
            mock.call(
                ['ip', 'route', 'show', '0.0.0.0/0'], capture=True),
            mock.call(['ip', '-4', 'route', 'add', '192.168.2.1',
                       'dev', 'eth0', 'src', '192.168.2.2'], capture=True),
            mock.call(
                ['ip', '-4', 'route', 'add', 'default', 'via',
                 '192.168.2.1', 'dev', 'eth0'], capture=True)]
        expected_teardown_calls = [
            mock.call(['ip', '-4', 'route', 'del', 'default', 'dev', 'eth0'],
                      capture=True),
            mock.call(['ip', '-4', 'route', 'del', '192.168.2.1',
                       'dev', 'eth0', 'src', '192.168.2.2'], capture=True),
        ]

        with net.EphemeralIPv4Network(**params):
            self.assertEqual(expected_setup_calls, m_subp.call_args_list)
        m_subp.assert_has_calls(expected_teardown_calls)

    def test_ephemeral_ipv4_network_with_rfc3442_static_routes(self, m_subp):
        params = {
            'interface': 'eth0', 'ip': '192.168.2.2',
            'prefix_or_mask': '255.255.255.0', 'broadcast': '192.168.2.255',
            'static_routes': [('169.254.169.254/32', '192.168.2.1'),
                              ('0.0.0.0/0', '192.168.2.1')],
            'router': '192.168.2.1'}
        expected_setup_calls = [
            mock.call(
                ['ip', '-family', 'inet', 'addr', 'add', '192.168.2.2/24',
                 'broadcast', '192.168.2.255', 'dev', 'eth0'],
                capture=True, update_env={'LANG': 'C'}),
            mock.call(
                ['ip', '-family', 'inet', 'link', 'set', 'dev', 'eth0', 'up'],
                capture=True),
            mock.call(
                ['ip', '-4', 'route', 'add', '169.254.169.254/32',
                 'via', '192.168.2.1', 'dev', 'eth0'], capture=True),
            mock.call(
                ['ip', '-4', 'route', 'add', '0.0.0.0/0',
                 'via', '192.168.2.1', 'dev', 'eth0'], capture=True)]
        expected_teardown_calls = [
            mock.call(
                ['ip', '-4', 'route', 'del', '0.0.0.0/0',
                 'via', '192.168.2.1', 'dev', 'eth0'], capture=True),
            mock.call(
                ['ip', '-4', 'route', 'del', '169.254.169.254/32',
                 'via', '192.168.2.1', 'dev', 'eth0'], capture=True),
            mock.call(
                ['ip', '-family', 'inet', 'link', 'set', 'dev',
                 'eth0', 'down'], capture=True),
            mock.call(
                ['ip', '-family', 'inet', 'addr', 'del',
                 '192.168.2.2/24', 'dev', 'eth0'], capture=True)
        ]
        with net.EphemeralIPv4Network(**params):
            self.assertEqual(expected_setup_calls, m_subp.call_args_list)
        m_subp.assert_has_calls(expected_setup_calls + expected_teardown_calls)


class TestApplyNetworkCfgNames(CiTestCase):
    V1_CONFIG = textwrap.dedent("""\
        version: 1
        config:
            - type: physical
              name: interface0
              mac_address: "52:54:00:12:34:00"
              subnets:
                  - type: static
                    address: 10.0.2.15
                    netmask: 255.255.255.0
                    gateway: 10.0.2.2
    """)
    V2_CONFIG = textwrap.dedent("""\
      version: 2
      ethernets:
          interface0:
            match:
              macaddress: "52:54:00:12:34:00"
            addresses:
              - 10.0.2.15/24
            gateway4: 10.0.2.2
            set-name: interface0
    """)

    V2_CONFIG_NO_SETNAME = textwrap.dedent("""\
      version: 2
      ethernets:
          interface0:
            match:
              macaddress: "52:54:00:12:34:00"
            addresses:
              - 10.0.2.15/24
            gateway4: 10.0.2.2
    """)

    V2_CONFIG_NO_MAC = textwrap.dedent("""\
      version: 2
      ethernets:
          interface0:
            match:
              driver: virtio-net
            addresses:
              - 10.0.2.15/24
            gateway4: 10.0.2.2
            set-name: interface0
    """)

    @mock.patch('cloudinit.net.device_devid')
    @mock.patch('cloudinit.net.device_driver')
    @mock.patch('cloudinit.net._rename_interfaces')
    def test_apply_v1_renames(self, m_rename_interfaces, m_device_driver,
                              m_device_devid):
        m_device_driver.return_value = 'virtio_net'
        m_device_devid.return_value = '0x15d8'

        net.apply_network_config_names(yaml.load(self.V1_CONFIG))

        call = ['52:54:00:12:34:00', 'interface0', 'virtio_net', '0x15d8']
        m_rename_interfaces.assert_called_with([call])

    @mock.patch('cloudinit.net.device_devid')
    @mock.patch('cloudinit.net.device_driver')
    @mock.patch('cloudinit.net._rename_interfaces')
    def test_apply_v2_renames(self, m_rename_interfaces, m_device_driver,
                              m_device_devid):
        m_device_driver.return_value = 'virtio_net'
        m_device_devid.return_value = '0x15d8'

        net.apply_network_config_names(yaml.load(self.V2_CONFIG))

        call = ['52:54:00:12:34:00', 'interface0', 'virtio_net', '0x15d8']
        m_rename_interfaces.assert_called_with([call])

    @mock.patch('cloudinit.net._rename_interfaces')
    def test_apply_v2_renames_skips_without_setname(self, m_rename_interfaces):
        net.apply_network_config_names(yaml.load(self.V2_CONFIG_NO_SETNAME))
        m_rename_interfaces.assert_called_with([])

    @mock.patch('cloudinit.net._rename_interfaces')
    def test_apply_v2_renames_skips_without_mac(self, m_rename_interfaces):
        net.apply_network_config_names(yaml.load(self.V2_CONFIG_NO_MAC))
        m_rename_interfaces.assert_called_with([])

    def test_apply_v2_renames_raises_runtime_error_on_unknown_version(self):
        with self.assertRaises(RuntimeError):
            net.apply_network_config_names(yaml.load("version: 3"))


class TestHasURLConnectivity(HttprettyTestCase):

    def setUp(self):
        super(TestHasURLConnectivity, self).setUp()
        self.url = 'http://fake/'
        self.kwargs = {'allow_redirects': True, 'timeout': 5.0}

    @mock.patch('cloudinit.net.readurl')
    def test_url_timeout_on_connectivity_check(self, m_readurl):
        """A timeout of 5 seconds is provided when reading a url."""
        self.assertTrue(
            net.has_url_connectivity(self.url), 'Expected True on url connect')

    def test_true_on_url_connectivity_success(self):
        httpretty.register_uri(httpretty.GET, self.url)
        self.assertTrue(
            net.has_url_connectivity(self.url), 'Expected True on url connect')

    @mock.patch('requests.Session.request')
    def test_true_on_url_connectivity_timeout(self, m_request):
        """A timeout raised accessing the url will return False."""
        m_request.side_effect = requests.Timeout('Fake Connection Timeout')
        self.assertFalse(
            net.has_url_connectivity(self.url),
            'Expected False on url timeout')

    def test_true_on_url_connectivity_failure(self):
        httpretty.register_uri(httpretty.GET, self.url, body={}, status=404)
        self.assertFalse(
            net.has_url_connectivity(self.url), 'Expected False on url fail')


def _mk_v1_phys(mac, name, driver, device_id):
    v1_cfg = {'type': 'physical', 'name': name, 'mac_address': mac}
    params = {}
    if driver:
        params.update({'driver': driver})
    if device_id:
        params.update({'device_id': device_id})

    if params:
        v1_cfg.update({'params': params})

    return v1_cfg


def _mk_v2_phys(mac, name, driver=None, device_id=None):
    v2_cfg = {'set-name': name, 'match': {'macaddress': mac}}
    if driver:
        v2_cfg['match'].update({'driver': driver})
    if device_id:
        v2_cfg['match'].update({'device_id': device_id})

    return v2_cfg


class TestExtractPhysdevs(CiTestCase):

    def setUp(self):
        super(TestExtractPhysdevs, self).setUp()
        self.add_patch('cloudinit.net.device_driver', 'm_driver')
        self.add_patch('cloudinit.net.device_devid', 'm_devid')

    def test_extract_physdevs_looks_up_driver_v1(self):
        driver = 'virtio'
        self.m_driver.return_value = driver
        physdevs = [
            ['aa:bb:cc:dd:ee:ff', 'eth0', None, '0x1000'],
        ]
        netcfg = {
            'version': 1,
            'config': [_mk_v1_phys(*args) for args in physdevs],
        }
        # insert the driver value for verification
        physdevs[0][2] = driver
        self.assertEqual(sorted(physdevs),
                         sorted(net.extract_physdevs(netcfg)))
        self.m_driver.assert_called_with('eth0')

    def test_extract_physdevs_looks_up_driver_v2(self):
        driver = 'virtio'
        self.m_driver.return_value = driver
        physdevs = [
            ['aa:bb:cc:dd:ee:ff', 'eth0', None, '0x1000'],
        ]
        netcfg = {
            'version': 2,
            'ethernets': {args[1]: _mk_v2_phys(*args) for args in physdevs},
        }
        # insert the driver value for verification
        physdevs[0][2] = driver
        self.assertEqual(sorted(physdevs),
                         sorted(net.extract_physdevs(netcfg)))
        self.m_driver.assert_called_with('eth0')

    def test_extract_physdevs_looks_up_devid_v1(self):
        devid = '0x1000'
        self.m_devid.return_value = devid
        physdevs = [
            ['aa:bb:cc:dd:ee:ff', 'eth0', 'virtio', None],
        ]
        netcfg = {
            'version': 1,
            'config': [_mk_v1_phys(*args) for args in physdevs],
        }
        # insert the driver value for verification
        physdevs[0][3] = devid
        self.assertEqual(sorted(physdevs),
                         sorted(net.extract_physdevs(netcfg)))
        self.m_devid.assert_called_with('eth0')

    def test_extract_physdevs_looks_up_devid_v2(self):
        devid = '0x1000'
        self.m_devid.return_value = devid
        physdevs = [
            ['aa:bb:cc:dd:ee:ff', 'eth0', 'virtio', None],
        ]
        netcfg = {
            'version': 2,
            'ethernets': {args[1]: _mk_v2_phys(*args) for args in physdevs},
        }
        # insert the driver value for verification
        physdevs[0][3] = devid
        self.assertEqual(sorted(physdevs),
                         sorted(net.extract_physdevs(netcfg)))
        self.m_devid.assert_called_with('eth0')

    def test_get_v1_type_physical(self):
        physdevs = [
            ['aa:bb:cc:dd:ee:ff', 'eth0', 'virtio', '0x1000'],
            ['00:11:22:33:44:55', 'ens3', 'e1000', '0x1643'],
            ['09:87:65:43:21:10', 'ens0p1', 'mlx4_core', '0:0:1000'],
        ]
        netcfg = {
            'version': 1,
            'config': [_mk_v1_phys(*args) for args in physdevs],
        }
        self.assertEqual(sorted(physdevs),
                         sorted(net.extract_physdevs(netcfg)))

    def test_get_v2_type_physical(self):
        physdevs = [
            ['aa:bb:cc:dd:ee:ff', 'eth0', 'virtio', '0x1000'],
            ['00:11:22:33:44:55', 'ens3', 'e1000', '0x1643'],
            ['09:87:65:43:21:10', 'ens0p1', 'mlx4_core', '0:0:1000'],
        ]
        netcfg = {
            'version': 2,
            'ethernets': {args[1]: _mk_v2_phys(*args) for args in physdevs},
        }
        self.assertEqual(sorted(physdevs),
                         sorted(net.extract_physdevs(netcfg)))

    def test_get_v2_type_physical_skips_if_no_set_name(self):
        netcfg = {
            'version': 2,
            'ethernets': {
                'ens3': {
                    'match': {'macaddress': '00:11:22:33:44:55'},
                }
            }
        }
        self.assertEqual([], net.extract_physdevs(netcfg))

    def test_runtime_error_on_unknown_netcfg_version(self):
        with self.assertRaises(RuntimeError):
            net.extract_physdevs({'version': 3, 'awesome_config': []})


class TestWaitForPhysdevs(CiTestCase):

    def setUp(self):
        super(TestWaitForPhysdevs, self).setUp()
        self.add_patch('cloudinit.net.get_interfaces_by_mac',
                       'm_get_iface_mac')
        self.add_patch('cloudinit.util.udevadm_settle', 'm_udev_settle')

    def test_wait_for_physdevs_skips_settle_if_all_present(self):
        physdevs = [
            ['aa:bb:cc:dd:ee:ff', 'eth0', 'virtio', '0x1000'],
            ['00:11:22:33:44:55', 'ens3', 'e1000', '0x1643'],
        ]
        netcfg = {
            'version': 2,
            'ethernets': {args[1]: _mk_v2_phys(*args)
                          for args in physdevs},
        }
        self.m_get_iface_mac.side_effect = iter([
            {'aa:bb:cc:dd:ee:ff': 'eth0',
             '00:11:22:33:44:55': 'ens3'},
        ])
        net.wait_for_physdevs(netcfg)
        self.assertEqual(0, self.m_udev_settle.call_count)

    def test_wait_for_physdevs_calls_udev_settle_on_missing(self):
        physdevs = [
            ['aa:bb:cc:dd:ee:ff', 'eth0', 'virtio', '0x1000'],
            ['00:11:22:33:44:55', 'ens3', 'e1000', '0x1643'],
        ]
        netcfg = {
            'version': 2,
            'ethernets': {args[1]: _mk_v2_phys(*args)
                          for args in physdevs},
        }
        self.m_get_iface_mac.side_effect = iter([
            {'aa:bb:cc:dd:ee:ff': 'eth0'},   # first call ens3 is missing
            {'aa:bb:cc:dd:ee:ff': 'eth0',
             '00:11:22:33:44:55': 'ens3'},   # second call has both
        ])
        net.wait_for_physdevs(netcfg)
        self.m_udev_settle.assert_called_with(exists=net.sys_dev_path('ens3'))

    def test_wait_for_physdevs_raise_runtime_error_if_missing_and_strict(self):
        physdevs = [
            ['aa:bb:cc:dd:ee:ff', 'eth0', 'virtio', '0x1000'],
            ['00:11:22:33:44:55', 'ens3', 'e1000', '0x1643'],
        ]
        netcfg = {
            'version': 2,
            'ethernets': {args[1]: _mk_v2_phys(*args)
                          for args in physdevs},
        }
        self.m_get_iface_mac.return_value = {}
        with self.assertRaises(RuntimeError):
            net.wait_for_physdevs(netcfg)

        self.assertEqual(5 * len(physdevs), self.m_udev_settle.call_count)

    def test_wait_for_physdevs_no_raise_if_not_strict(self):
        physdevs = [
            ['aa:bb:cc:dd:ee:ff', 'eth0', 'virtio', '0x1000'],
            ['00:11:22:33:44:55', 'ens3', 'e1000', '0x1643'],
        ]
        netcfg = {
            'version': 2,
            'ethernets': {args[1]: _mk_v2_phys(*args)
                          for args in physdevs},
        }
        self.m_get_iface_mac.return_value = {}
        net.wait_for_physdevs(netcfg, strict=False)
        self.assertEqual(5 * len(physdevs), self.m_udev_settle.call_count)


class TestNetFailOver(CiTestCase):

    def setUp(self):
        super(TestNetFailOver, self).setUp()
        self.add_patch('cloudinit.net.util', 'm_util')
        self.add_patch('cloudinit.net.read_sys_net', 'm_read_sys_net')
        self.add_patch('cloudinit.net.device_driver', 'm_device_driver')

    def test_get_dev_features(self):
        devname = self.random_string()
        features = self.random_string()
        self.m_read_sys_net.return_value = features

        self.assertEqual(features, net.get_dev_features(devname))
        self.assertEqual(1, self.m_read_sys_net.call_count)
        self.assertEqual(mock.call(devname, 'device/features'),
                         self.m_read_sys_net.call_args_list[0])

    def test_get_dev_features_none_returns_empty_string(self):
        devname = self.random_string()
        self.m_read_sys_net.side_effect = Exception('error')
        self.assertEqual('', net.get_dev_features(devname))
        self.assertEqual(1, self.m_read_sys_net.call_count)
        self.assertEqual(mock.call(devname, 'device/features'),
                         self.m_read_sys_net.call_args_list[0])

    @mock.patch('cloudinit.net.get_dev_features')
    def test_has_netfail_standby_feature(self, m_dev_features):
        devname = self.random_string()
        standby_features = ('0' * 62) + '1' + '0'
        m_dev_features.return_value = standby_features
        self.assertTrue(net.has_netfail_standby_feature(devname))

    @mock.patch('cloudinit.net.get_dev_features')
    def test_has_netfail_standby_feature_short_is_false(self, m_dev_features):
        devname = self.random_string()
        standby_features = self.random_string()
        m_dev_features.return_value = standby_features
        self.assertFalse(net.has_netfail_standby_feature(devname))

    @mock.patch('cloudinit.net.get_dev_features')
    def test_has_netfail_standby_feature_not_present_is_false(self,
                                                              m_dev_features):
        devname = self.random_string()
        standby_features = '0' * 64
        m_dev_features.return_value = standby_features
        self.assertFalse(net.has_netfail_standby_feature(devname))

    @mock.patch('cloudinit.net.get_dev_features')
    def test_has_netfail_standby_feature_no_features_is_false(self,
                                                              m_dev_features):
        devname = self.random_string()
        standby_features = None
        m_dev_features.return_value = standby_features
        self.assertFalse(net.has_netfail_standby_feature(devname))

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    def test_is_netfail_master(self, m_exists, m_standby):
        devname = self.random_string()
        driver = 'virtio_net'
        m_exists.return_value = False  # no master sysfs attr
        m_standby.return_value = True  # has standby feature flag
        self.assertTrue(net.is_netfail_master(devname, driver))

    @mock.patch('cloudinit.net.sys_dev_path')
    def test_is_netfail_master_checks_master_attr(self, m_sysdev):
        devname = self.random_string()
        driver = 'virtio_net'
        m_sysdev.return_value = self.random_string()
        self.assertFalse(net.is_netfail_master(devname, driver))
        self.assertEqual(1, m_sysdev.call_count)
        self.assertEqual(mock.call(devname, path='master'),
                         m_sysdev.call_args_list[0])

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    def test_is_netfail_master_wrong_driver(self, m_exists, m_standby):
        devname = self.random_string()
        driver = self.random_string()
        self.assertFalse(net.is_netfail_master(devname, driver))

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    def test_is_netfail_master_has_master_attr(self, m_exists, m_standby):
        devname = self.random_string()
        driver = 'virtio_net'
        m_exists.return_value = True  # has master sysfs attr
        self.assertFalse(net.is_netfail_master(devname, driver))

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    def test_is_netfail_master_no_standby_feat(self, m_exists, m_standby):
        devname = self.random_string()
        driver = 'virtio_net'
        m_exists.return_value = False  # no master sysfs attr
        m_standby.return_value = False  # no standby feature flag
        self.assertFalse(net.is_netfail_master(devname, driver))

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    @mock.patch('cloudinit.net.sys_dev_path')
    def test_is_netfail_primary(self, m_sysdev, m_exists, m_standby):
        devname = self.random_string()
        driver = self.random_string()  # device not virtio_net
        master_devname = self.random_string()
        m_sysdev.return_value = "%s/%s" % (self.random_string(),
                                           master_devname)
        m_exists.return_value = True  # has master sysfs attr
        self.m_device_driver.return_value = 'virtio_net'  # master virtio_net
        m_standby.return_value = True  # has standby feature flag
        self.assertTrue(net.is_netfail_primary(devname, driver))
        self.assertEqual(1, self.m_device_driver.call_count)
        self.assertEqual(mock.call(master_devname),
                         self.m_device_driver.call_args_list[0])
        self.assertEqual(1, m_standby.call_count)
        self.assertEqual(mock.call(master_devname),
                         m_standby.call_args_list[0])

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    @mock.patch('cloudinit.net.sys_dev_path')
    def test_is_netfail_primary_wrong_driver(self, m_sysdev, m_exists,
                                             m_standby):
        devname = self.random_string()
        driver = 'virtio_net'
        self.assertFalse(net.is_netfail_primary(devname, driver))

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    @mock.patch('cloudinit.net.sys_dev_path')
    def test_is_netfail_primary_no_master(self, m_sysdev, m_exists, m_standby):
        devname = self.random_string()
        driver = self.random_string()  # device not virtio_net
        m_exists.return_value = False  # no master sysfs attr
        self.assertFalse(net.is_netfail_primary(devname, driver))

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    @mock.patch('cloudinit.net.sys_dev_path')
    def test_is_netfail_primary_bad_master(self, m_sysdev, m_exists,
                                           m_standby):
        devname = self.random_string()
        driver = self.random_string()  # device not virtio_net
        master_devname = self.random_string()
        m_sysdev.return_value = "%s/%s" % (self.random_string(),
                                           master_devname)
        m_exists.return_value = True  # has master sysfs attr
        self.m_device_driver.return_value = 'XXXX'  # master not virtio_net
        self.assertFalse(net.is_netfail_primary(devname, driver))

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    @mock.patch('cloudinit.net.sys_dev_path')
    def test_is_netfail_primary_no_standby(self, m_sysdev, m_exists,
                                           m_standby):
        devname = self.random_string()
        driver = self.random_string()  # device not virtio_net
        master_devname = self.random_string()
        m_sysdev.return_value = "%s/%s" % (self.random_string(),
                                           master_devname)
        m_exists.return_value = True  # has master sysfs attr
        self.m_device_driver.return_value = 'virtio_net'  # master virtio_net
        m_standby.return_value = False  # master has no standby feature flag
        self.assertFalse(net.is_netfail_primary(devname, driver))

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    def test_is_netfail_standby(self, m_exists, m_standby):
        devname = self.random_string()
        driver = 'virtio_net'
        m_exists.return_value = True  # has master sysfs attr
        m_standby.return_value = True  # has standby feature flag
        self.assertTrue(net.is_netfail_standby(devname, driver))

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    def test_is_netfail_standby_wrong_driver(self, m_exists, m_standby):
        devname = self.random_string()
        driver = self.random_string()
        self.assertFalse(net.is_netfail_standby(devname, driver))

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    def test_is_netfail_standby_no_master(self, m_exists, m_standby):
        devname = self.random_string()
        driver = 'virtio_net'
        m_exists.return_value = False  # has master sysfs attr
        self.assertFalse(net.is_netfail_standby(devname, driver))

    @mock.patch('cloudinit.net.has_netfail_standby_feature')
    @mock.patch('cloudinit.net.os.path.exists')
    def test_is_netfail_standby_no_standby_feature(self, m_exists, m_standby):
        devname = self.random_string()
        driver = 'virtio_net'
        m_exists.return_value = True  # has master sysfs attr
        m_standby.return_value = False  # has standby feature flag
        self.assertFalse(net.is_netfail_standby(devname, driver))

    @mock.patch('cloudinit.net.is_netfail_standby')
    @mock.patch('cloudinit.net.is_netfail_primary')
    def test_is_netfailover_primary(self, m_primary, m_standby):
        devname = self.random_string()
        driver = self.random_string()
        m_primary.return_value = True
        m_standby.return_value = False
        self.assertTrue(net.is_netfailover(devname, driver))

    @mock.patch('cloudinit.net.is_netfail_standby')
    @mock.patch('cloudinit.net.is_netfail_primary')
    def test_is_netfailover_standby(self, m_primary, m_standby):
        devname = self.random_string()
        driver = self.random_string()
        m_primary.return_value = False
        m_standby.return_value = True
        self.assertTrue(net.is_netfailover(devname, driver))

    @mock.patch('cloudinit.net.is_netfail_standby')
    @mock.patch('cloudinit.net.is_netfail_primary')
    def test_is_netfailover_returns_false(self, m_primary, m_standby):
        devname = self.random_string()
        driver = self.random_string()
        m_primary.return_value = False
        m_standby.return_value = False
        self.assertFalse(net.is_netfailover(devname, driver))

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