systemd-stable/test/test-network/systemd-networkd-tests.py

#!/usr/bin/env python3
# SPDX-License-Identifier: LGPL-2.1+
# systemd-networkd tests

import os
import re
import shutil
import signal
import socket
import subprocess
import sys
import threading
import time
import unittest
from shutil import copytree

network_unit_file_path='/run/systemd/network'
networkd_runtime_directory='/run/systemd/netif'
networkd_ci_path='/run/networkd-ci'
network_sysctl_ipv6_path='/proc/sys/net/ipv6/conf'
network_sysctl_ipv4_path='/proc/sys/net/ipv4/conf'

dnsmasq_pid_file='/run/networkd-ci/test-test-dnsmasq.pid'
dnsmasq_log_file='/run/networkd-ci/test-dnsmasq-log-file'

def is_module_available(module_name):
    lsmod_output = subprocess.check_output('lsmod', universal_newlines=True)
    module_re = re.compile(r'^{0}\b'.format(re.escape(module_name)), re.MULTILINE)
    return module_re.search(lsmod_output) or not subprocess.call(["modprobe", module_name])

def expectedFailureIfModuleIsNotAvailable(module_name):
    def f(func):
        if not is_module_available(module_name):
            return unittest.expectedFailure(func)
        return func

    return f

def setUpModule():

    os.makedirs(network_unit_file_path, exist_ok=True)
    os.makedirs(networkd_ci_path, exist_ok=True)

    shutil.rmtree(networkd_ci_path)
    copytree(os.path.join(os.path.dirname(os.path.abspath(__file__)), 'conf'), networkd_ci_path)

    subprocess.check_call('systemctl stop systemd-networkd.socket', shell=True)

def tearDownModule():
    shutil.rmtree(networkd_ci_path)

    subprocess.check_call('systemctl stop systemd-networkd.service', shell=True)
    subprocess.check_call('systemctl start systemd-networkd.socket', shell=True)
    subprocess.check_call('systemctl start systemd-networkd.service', shell=True)

class Utilities():
    dhcp_server_data = []

    def read_link_attr(self, link, dev, attribute):
        with open(os.path.join(os.path.join(os.path.join('/sys/class/net/', link), dev), attribute)) as f:
            return f.readline().strip()

    def read_bridge_port_attr(self, bridge, link, attribute):

        path_bridge = os.path.join('/sys/devices/virtual/net', bridge)
        path_port = 'lower_' + link + '/brport'
        path = os.path.join(path_bridge, path_port)

        with open(os.path.join(path, attribute)) as f:
            return f.readline().strip()

    def link_exits(self, link):
        return os.path.exists(os.path.join('/sys/class/net', link))

    def link_remove(self, links):
        for link in links:
            if os.path.exists(os.path.join('/sys/class/net', link)):
                subprocess.call(['ip', 'link', 'del', 'dev', link])
        time.sleep(1)

    def read_ipv6_sysctl_attr(self, link, attribute):
        with open(os.path.join(os.path.join(network_sysctl_ipv6_path, link), attribute)) as f:
            return f.readline().strip()

    def read_ipv4_sysctl_attr(self, link, attribute):
        with open(os.path.join(os.path.join(network_sysctl_ipv4_path, link), attribute)) as f:
            return f.readline().strip()

    def copy_unit_to_networkd_unit_path(self, *units):
        for unit in units:
            shutil.copy(os.path.join(networkd_ci_path, unit), network_unit_file_path)
            if (os.path.exists(os.path.join(networkd_ci_path, unit + '.d'))):
                copytree(os.path.join(networkd_ci_path, unit + '.d'), os.path.join(network_unit_file_path, unit + '.d'))

    def remove_unit_from_networkd_path(self, units):
        for unit in units:
            if (os.path.exists(os.path.join(network_unit_file_path, unit))):
                os.remove(os.path.join(network_unit_file_path, unit))
                if (os.path.exists(os.path.join(network_unit_file_path, unit + '.d'))):
                    shutil.rmtree(os.path.join(network_unit_file_path, unit + '.d'))

    def start_dnsmasq(self):
        subprocess.check_call('dnsmasq -8 /var/run/networkd-ci/test-dnsmasq-log-file --log-queries=extra --log-dhcp --pid-file=/var/run/networkd-ci/test-test-dnsmasq.pid --conf-file=/dev/null --interface=veth-peer --enable-ra --dhcp-range=2600::10,2600::20 --dhcp-range=192.168.5.10,192.168.5.200 -R --dhcp-leasefile=/var/run/networkd-ci/lease --dhcp-option=26,1492 --dhcp-option=option:router,192.168.5.1 --dhcp-option=33,192.168.5.4,192.168.5.5 --port=0', shell=True)

        time.sleep(10)

    def stop_dnsmasq(self, pid_file):
        if os.path.exists(pid_file):
            with open(pid_file, 'r') as f:
                pid = f.read().rstrip(' \t\r\n\0')
                os.kill(int(pid), signal.SIGTERM)

            os.remove(pid_file)

    def search_words_in_dnsmasq_log(self, words, show_all=False):
        if os.path.exists(dnsmasq_log_file):
            with open (dnsmasq_log_file) as in_file:
                contents = in_file.read()
                if show_all:
                    print(contents)
                for line in contents.split('\n'):
                    if words in line:
                        in_file.close()
                        print("%s, %s" % (words, line))
                        return True
        return False

    def remove_lease_file(self):
        if os.path.exists(os.path.join(networkd_ci_path, 'lease')):
            os.remove(os.path.join(networkd_ci_path, 'lease'))

    def remove_log_file(self):
        if os.path.exists(dnsmasq_log_file):
            os.remove(dnsmasq_log_file)

    def start_networkd(self):
        if (os.path.exists(os.path.join(networkd_runtime_directory, 'state'))):
            subprocess.check_call('systemctl stop systemd-networkd', shell=True)
            os.remove(os.path.join(networkd_runtime_directory, 'state'))
            subprocess.check_call('systemctl start systemd-networkd', shell=True)
        else:
            subprocess.check_call('systemctl restart systemd-networkd', shell=True)
        time.sleep(5)
        print()

global ip
global port

class DHCPServer(threading.Thread):
    def __init__(self, name):
        threading.Thread.__init__(self)
        self.name = name

    def run(self):
        self.start_dhcp_server()

    def start_dhcp_server(self):
        sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

        server_address = ('0.0.0.0', 67)
        sock.bind(server_address)

        print('Starting DHCP Server ...\n')
        data, addr = sock.recvfrom(1024) # buffer size is 1024 bytes

        global ip
        ip = addr[0]

        global port
        port = addr[1]
        sock.close()

class NetworkdNetDevTests(unittest.TestCase, Utilities):

    links =[
        '6rdtun99',
        'bond99',
        'bridge99',
        'dropin-test',
        'dummy98',
        'erspan-test',
        'geneve99',
        'gretap99',
        'gretun99',
        'ip6gretap99',
        'ip6tnl99',
        'ipiptun99',
        'ipvlan99',
        'isataptun99',
        'macvlan99',
        'macvtap99',
        'sittun99',
        'tap99',
        'test1',
        'tun99',
        'vcan99',
        'veth99',
        'vlan99',
        'vrf99',
        'vti6tun99',
        'vtitun99',
        'vxlan99',
        'wg98',
        'wg99']

    units = [
        '10-dropin-test.netdev',
        '11-dummy.netdev',
        '12-dummy.netdev',
        '21-macvlan.netdev',
        '21-macvtap.netdev',
        '21-vlan.netdev',
        '21-vlan.network',
        '25-6rd-tunnel.netdev',
        '25-bond.netdev',
        '25-bond-balanced-tlb.netdev',
        '25-bridge.netdev',
        '25-erspan-tunnel.netdev',
        '25-geneve.netdev',
        '25-gretap-tunnel.netdev',
        '25-gre-tunnel.netdev',
        '25-ip6gre-tunnel.netdev',
        '25-ip6tnl-tunnel.netdev',
        '25-ipip-tunnel-independent.netdev',
        '25-ipip-tunnel.netdev',
        '25-ipvlan.netdev',
        '25-isatap-tunnel.netdev',
        '25-sit-tunnel.netdev',
        '25-tap.netdev',
        '25-tun.netdev',
        '25-vcan.netdev',
        '25-veth.netdev',
        '25-vrf.netdev',
        '25-vti6-tunnel.netdev',
        '25-vti-tunnel.netdev',
        '25-vxlan.netdev',
        '25-wireguard-23-peers.netdev',
        '25-wireguard-23-peers.network',
        '25-wireguard.netdev',
        '6rd.network',
        'gre.network',
        'gretap.network',
        'gretun.network',
        'ip6gretap.network',
        'ip6tnl.network',
        'ipip.network',
        'ipvlan.network',
        'isatap.network',
        'macvlan.network',
        'macvtap.network',
        'sit.network',
        'vti6.network',
        'vti.network',
        'vxlan.network']

    def setUp(self):
        self.link_remove(self.links)

    def tearDown(self):
        self.link_remove(self.links)
        self.remove_unit_from_networkd_path(self.units)

    def test_dropin(self):
        self.copy_unit_to_networkd_unit_path('10-dropin-test.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dropin-test'))

        output = subprocess.check_output(['ip', 'link', 'show', 'dropin-test']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '00:50:56:c0:00:28')

    def test_bridge(self):
        self.copy_unit_to_networkd_unit_path('25-bridge.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('bridge99'))

        self.assertEqual('900', self.read_link_attr('bridge99', 'bridge', 'hello_time'))
        self.assertEqual('900', self.read_link_attr('bridge99', 'bridge', 'max_age'))
        self.assertEqual('900', self.read_link_attr('bridge99', 'bridge','forward_delay'))
        self.assertEqual('900', self.read_link_attr('bridge99', 'bridge','ageing_time'))
        self.assertEqual('9',   self.read_link_attr('bridge99', 'bridge','priority'))
        self.assertEqual('1',   self.read_link_attr('bridge99', 'bridge','multicast_querier'))
        self.assertEqual('1',   self.read_link_attr('bridge99', 'bridge','multicast_snooping'))
        self.assertEqual('1',   self.read_link_attr('bridge99', 'bridge','stp_state'))

    def test_bond(self):
        self.copy_unit_to_networkd_unit_path('25-bond.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('bond99'))

        self.assertEqual('802.3ad 4',         self.read_link_attr('bond99', 'bonding', 'mode'))
        self.assertEqual('layer3+4 1',        self.read_link_attr('bond99', 'bonding', 'xmit_hash_policy'))
        self.assertEqual('1000',              self.read_link_attr('bond99', 'bonding', 'miimon'))
        self.assertEqual('fast 1',            self.read_link_attr('bond99', 'bonding', 'lacp_rate'))
        self.assertEqual('2000',              self.read_link_attr('bond99', 'bonding', 'updelay'))
        self.assertEqual('2000',              self.read_link_attr('bond99', 'bonding', 'downdelay'))
        self.assertEqual('4',                 self.read_link_attr('bond99', 'bonding', 'resend_igmp'))
        self.assertEqual('1',                 self.read_link_attr('bond99', 'bonding', 'min_links'))
        self.assertEqual('1218',              self.read_link_attr('bond99', 'bonding', 'ad_actor_sys_prio'))
        self.assertEqual('811',               self.read_link_attr('bond99', 'bonding', 'ad_user_port_key'))
        self.assertEqual('00:11:22:33:44:55', self.read_link_attr('bond99', 'bonding', 'ad_actor_system'))

    def test_bond_balanced_tlb(self):
        self.copy_unit_to_networkd_unit_path('25-bond-balanced-tlb.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('bond99'))

        self.assertEqual('balance-tlb 5', self.read_link_attr('bond99', 'bonding', 'mode'))
        self.assertEqual('1',             self.read_link_attr('bond99', 'bonding', 'tlb_dynamic_lb'))

    def test_vlan(self):
        self.copy_unit_to_networkd_unit_path('21-vlan.netdev', '11-dummy.netdev', '21-vlan.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('vlan99'))

        output = subprocess.check_output(['ip', '-d', 'link', 'show', 'vlan99']).rstrip().decode('utf-8')
        print(output)
        self.assertTrue(output, 'REORDER_HDR')
        self.assertTrue(output, 'LOOSE_BINDING')
        self.assertTrue(output, 'GVRP')
        self.assertTrue(output, 'MVRP')
        self.assertTrue(output, '99')

    def test_macvtap(self):
        self.copy_unit_to_networkd_unit_path('21-macvtap.netdev', '11-dummy.netdev', 'macvtap.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('macvtap99'))

    def test_macvlan(self):
        self.copy_unit_to_networkd_unit_path('21-macvlan.netdev', '11-dummy.netdev', 'macvlan.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('macvlan99'))

    @expectedFailureIfModuleIsNotAvailable('ipvlan')
    def test_ipvlan(self):
        self.copy_unit_to_networkd_unit_path('25-ipvlan.netdev', '11-dummy.netdev', 'ipvlan.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('ipvlan99'))

    def test_veth(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

    def test_dummy(self):
        self.copy_unit_to_networkd_unit_path('11-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('test1'))

    def test_tun(self):
        self.copy_unit_to_networkd_unit_path('25-tun.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('tun99'))

    def test_tap(self):
        self.copy_unit_to_networkd_unit_path('25-tap.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('tap99'))

    @expectedFailureIfModuleIsNotAvailable('vrf')
    def test_vrf(self):
        self.copy_unit_to_networkd_unit_path('25-vrf.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('vrf99'))

    @expectedFailureIfModuleIsNotAvailable('vcan')
    def test_vcan(self):
        self.copy_unit_to_networkd_unit_path('25-vcan.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('vcan99'))

    @expectedFailureIfModuleIsNotAvailable('wireguard')
    def test_wireguard(self):
        self.copy_unit_to_networkd_unit_path('25-wireguard.netdev')
        self.start_networkd()

        if shutil.which('wg'):
            subprocess.call('wg')

        self.assertTrue(self.link_exits('wg99'))

    @expectedFailureIfModuleIsNotAvailable('wireguard')
    def test_wireguard_23_peers(self):
        self.copy_unit_to_networkd_unit_path('25-wireguard-23-peers.netdev', '25-wireguard-23-peers.network')
        self.start_networkd()

        if shutil.which('wg'):
            subprocess.call('wg')

        self.assertTrue(self.link_exits('wg98'))

    def test_geneve(self):
        self.copy_unit_to_networkd_unit_path('25-geneve.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('geneve99'))

        output = subprocess.check_output(['ip', '-d', 'link', 'show', 'geneve99']).rstrip().decode('utf-8')
        print(output)
        self.assertTrue(output, '192.168.22.1')
        self.assertTrue(output, '6082')
        self.assertTrue(output, 'udpcsum')
        self.assertTrue(output, 'udp6zerocsumrx')

    def test_ipip_tunnel(self):
        self.copy_unit_to_networkd_unit_path('12-dummy.netdev', '25-ipip-tunnel.netdev', 'ipip.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('ipiptun99'))

    def test_gre_tunnel(self):
        self.copy_unit_to_networkd_unit_path('12-dummy.netdev', '25-gre-tunnel.netdev', 'gretun.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('gretun99'))

    def test_gretap_tunnel(self):
        self.copy_unit_to_networkd_unit_path('12-dummy.netdev', '25-gretap-tunnel.netdev', 'gretap.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('gretap99'))

    def test_ip6gretap_tunnel(self):
        self.copy_unit_to_networkd_unit_path('12-dummy.netdev', '25-ip6gre-tunnel.netdev', 'ip6gretap.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('ip6gretap99'))

    def test_vti_tunnel(self):
        self.copy_unit_to_networkd_unit_path('12-dummy.netdev', '25-vti-tunnel.netdev', 'vti.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('vtitun99'))

    def test_vti6_tunnel(self):
        self.copy_unit_to_networkd_unit_path('12-dummy.netdev', '25-vti6-tunnel.netdev', 'vti6.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('vti6tun99'))

    def test_ip6tnl_tunnel(self):
        self.copy_unit_to_networkd_unit_path('12-dummy.netdev', '25-ip6tnl-tunnel.netdev', 'ip6tnl.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('ip6tnl99'))

    def test_sit_tunnel(self):
        self.copy_unit_to_networkd_unit_path('12-dummy.netdev', '25-sit-tunnel.netdev', 'sit.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('sittun99'))

    def test_isatap_tunnel(self):
        self.copy_unit_to_networkd_unit_path('12-dummy.netdev', '25-isatap-tunnel.netdev', 'isatap.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('isataptun99'))

        output = subprocess.check_output(['ip', '-d', 'link', 'show', 'isataptun99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, "isatap ")

    def test_6rd_tunnel(self):
        self.copy_unit_to_networkd_unit_path('12-dummy.netdev', '25-6rd-tunnel.netdev', '6rd.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('sittun99'))

    def test_erspan_tunnel(self):
        self.copy_unit_to_networkd_unit_path('25-erspan-tunnel.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('erspan-test'))

        output = subprocess.check_output(['ip', '-d', 'link', 'show', 'erspan-test']).rstrip().decode('utf-8')
        print(output)
        self.assertTrue(output, '172.16.1.200')
        self.assertTrue(output, '172.16.1.100')
        self.assertTrue(output, '101')

    def test_tunnel_independent(self):
        self.copy_unit_to_networkd_unit_path('25-ipip-tunnel-independent.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('ipiptun99'))

    def test_vxlan(self):
        self.copy_unit_to_networkd_unit_path('25-vxlan.netdev', 'vxlan.network','11-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('vxlan99'))

        output = subprocess.check_output(['ip', '-d', 'link', 'show', 'vxlan99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, "999")
        self.assertRegex(output, '5555')
        self.assertRegex(output, 'l2miss')
        self.assertRegex(output, 'l3miss')
        self.assertRegex(output, 'udpcsum')
        self.assertRegex(output, 'udp6zerocsumtx')
        self.assertRegex(output, 'udp6zerocsumrx')
        self.assertRegex(output, 'remcsumtx')
        self.assertRegex(output, 'remcsumrx')
        self.assertRegex(output, 'gbp')

class NetworkdNetWorkTests(unittest.TestCase, Utilities):
    links = [
        'bond199',
        'dummy98',
        'test1']

    units = [
        '11-dummy.netdev',
        '12-dummy.netdev',
        '23-active-slave.network',
        '23-bond199.network',
        '23-primary-slave.network',
        '23-test1-bond199.network',
        '25-address-link-section.network',
        '25-address-section-miscellaneous.network',
        '25-address-section.network',
        '25-bond-active-backup-slave.netdev',
        '25-fibrule-invert.network',
        '25-fibrule-port-range.network',
        '25-ipv6-address-label-section.network',
        '25-neighbor-section.network',
        '25-link-section-unmanaged.network',
        '25-route-gateway.network',
        '25-route-gateway-on-link.network',
        '25-route-ipv6-src.network',
        '25-route-reverse-order.network',
        '25-route-section.network',
        '25-route-tcp-window-settings.network',
        '25-route-type.network',
        '25-sysctl.network',
        'configure-without-carrier.network',
        'routing-policy-rule.network',
        'test-static.network']

    def setUp(self):
        self.link_remove(self.links)

    def tearDown(self):
        self.link_remove(self.links)
        self.remove_unit_from_networkd_path(self.units)

    def test_static_address(self):
        self.copy_unit_to_networkd_unit_path('12-dummy.netdev', 'test-static.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['networkctl', 'status', 'dummy98']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '192.168.0.15')
        self.assertRegex(output, '192.168.0.1')
        self.assertRegex(output, 'routable')

    def test_configure_without_carrier(self):
        self.copy_unit_to_networkd_unit_path('configure-without-carrier.network', '11-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('test1'))

        output = subprocess.check_output(['networkctl', 'status', 'test1']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '192.168.0.15')
        self.assertRegex(output, '192.168.0.1')
        self.assertRegex(output, 'routable')

    def test_bond_active_slave(self):
        self.copy_unit_to_networkd_unit_path('23-active-slave.network', '23-bond199.network', '25-bond-active-backup-slave.netdev', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('bond199'))

        output = subprocess.check_output(['ip', '-d', 'link', 'show', 'bond199']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'active_slave dummy98')

    def test_bond_primary_slave(self):
        self.copy_unit_to_networkd_unit_path('23-primary-slave.network', '23-test1-bond199.network', '25-bond-active-backup-slave.netdev', '11-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('test1'))
        self.assertTrue(self.link_exits('bond199'))

        output = subprocess.check_output(['ip', '-d', 'link', 'show', 'bond199']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'primary test1')

    def test_routing_policy_rule(self):
        self.copy_unit_to_networkd_unit_path('routing-policy-rule.network', '11-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('test1'))

        output = subprocess.check_output(['ip', 'rule']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '111')
        self.assertRegex(output, 'from 192.168.100.18')
        self.assertRegex(output, r'tos (?:0x08|throughput)\s')
        self.assertRegex(output, 'iif test1')
        self.assertRegex(output, 'oif test1')
        self.assertRegex(output, 'lookup 7')

        subprocess.call(['ip', 'rule', 'del', 'table', '7'])

    def test_routing_policy_rule_port_range(self):
        self.copy_unit_to_networkd_unit_path('25-fibrule-port-range.network', '11-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('test1'))

        output = subprocess.check_output(['ip', 'rule']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '111')
        self.assertRegex(output, 'from 192.168.100.18')
        self.assertRegex(output, '1123-1150')
        self.assertRegex(output, '3224-3290')
        self.assertRegex(output, 'tcp')
        self.assertRegex(output, 'lookup 7')

        subprocess.call(['ip', 'rule', 'del', 'table', '7'])

    def test_routing_policy_rule_invert(self):
        self.copy_unit_to_networkd_unit_path('25-fibrule-invert.network', '11-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('test1'))

        output = subprocess.check_output(['ip', 'rule']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '111')
        self.assertRegex(output, 'not.*?from.*?192.168.100.18')
        self.assertRegex(output, 'tcp')
        self.assertRegex(output, 'lookup 7')

        subprocess.call(['ip', 'rule', 'del', 'table', '7'])

    def test_address_peer(self):
        self.copy_unit_to_networkd_unit_path('25-address-section.network', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['ip', 'address', 'show', 'dummy98']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'inet 10.2.3.4 peer 10.2.3.5/16 scope global 32')
        self.assertRegex(output, 'inet 10.6.7.8/16 brd 10.6.255.255 scope global 33')
        self.assertRegex(output, 'inet6 2001:db8::20 peer 2001:db8::10/128 scope global')

        output = subprocess.check_output(['networkctl', 'status', 'dummy98']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'State: routable \(configured\)')

    def test_address_preferred_lifetime_zero_ipv6(self):
        self.copy_unit_to_networkd_unit_path('25-address-section-miscellaneous.network', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['ip', 'address', 'show', 'dummy98']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'inet 10.2.3.4/16 brd 10.2.255.255 scope link deprecated dummy98')
        self.assertRegex(output, 'inet6 2001:db8:0:f101::1/64 scope global')

    def test_ip_route(self):
        self.copy_unit_to_networkd_unit_path('25-route-section.network', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['ip', 'route', 'list', 'dev', 'dummy98']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '192.168.0.1')
        self.assertRegex(output, 'static')
        self.assertRegex(output, '192.168.0.0/24')

    def test_ip_route_reverse(self):
        self.copy_unit_to_networkd_unit_path('25-route-reverse-order.network', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['ip', '-6', 'route', 'show', 'dev', 'dummy98']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '2001:1234:5:8fff:ff:ff:ff:ff')
        self.assertRegex(output, '2001:1234:5:8f63::1')

    def test_ip_route_blackhole_unreachable_prohibit(self):
        self.copy_unit_to_networkd_unit_path('25-route-type.network', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['ip', 'route', 'list']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'blackhole')
        self.assertRegex(output, 'unreachable')
        self.assertRegex(output, 'prohibit')

        subprocess.call(['ip', 'route', 'del', 'blackhole', '202.54.1.2'])
        subprocess.call(['ip', 'route', 'del', 'unreachable', '202.54.1.3'])
        subprocess.call(['ip', 'route', 'del', 'prohibit', '202.54.1.4'])

    def test_ip_route_tcp_window(self):
        self.copy_unit_to_networkd_unit_path('25-route-tcp-window-settings.network', '11-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('test1'))

        output = subprocess.check_output(['ip', 'route', 'list']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'initcwnd 20')
        self.assertRegex(output, 'initrwnd 30')

    def test_ip_route_gateway(self):
        self.copy_unit_to_networkd_unit_path('25-route-gateway.network', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['ip', 'route', 'list', 'dev', 'dummy98', 'default']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'default')
        self.assertRegex(output, 'via')
        self.assertRegex(output, '149.10.124.64')
        self.assertRegex(output, 'proto')
        self.assertRegex(output, 'static')

        output = subprocess.check_output(['ip', 'route', 'list', 'dev', 'dummy98', 'src', '149.10.124.58']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '149.10.124.48/28')
        self.assertRegex(output, 'proto')
        self.assertRegex(output, 'kernel')
        self.assertRegex(output, 'scope')
        self.assertRegex(output, 'link')

    def test_ip_route_gateway_on_link(self):
        self.copy_unit_to_networkd_unit_path('25-route-gateway-on-link.network', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['ip', 'route', 'list', 'dev', 'dummy98', 'default']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'default')
        self.assertRegex(output, 'via')
        self.assertRegex(output, '149.10.125.65')
        self.assertRegex(output, 'proto')
        self.assertRegex(output, 'static')
        self.assertRegex(output, 'onlink')

        output = subprocess.check_output(['ip', 'route', 'list', 'dev', 'dummy98', 'src', '149.10.124.58']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '149.10.124.48/28')
        self.assertRegex(output, 'proto')
        self.assertRegex(output, 'kernel')
        self.assertRegex(output, 'scope')
        self.assertRegex(output, 'link')

    def test_ip_route_ipv6_src_route(self):
        # a dummy device does not make the addresses go through tentative state, so we
        # reuse a bond from an earlier test, which does make the addresses go through
        # tentative state, and do our test on that
        self.copy_unit_to_networkd_unit_path('23-active-slave.network', '25-route-ipv6-src.network', '25-bond-active-backup-slave.netdev', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('bond199'))

        output = subprocess.check_output(['ip', '-6', 'route', 'list', 'dev', 'bond199']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'abcd::/16')
        self.assertRegex(output, 'src')
        self.assertRegex(output, '2001:1234:56:8f63::2')

    def test_ip_link_mac_address(self):
        self.copy_unit_to_networkd_unit_path('25-address-link-section.network', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['ip', 'link', 'show', 'dummy98']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '00:01:02:aa:bb:cc')

    def test_ip_link_unmanaged(self):
        self.copy_unit_to_networkd_unit_path('25-link-section-unmanaged.network', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['networkctl', 'status', 'dummy98']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'unmanaged')

    def test_ipv6_address_label(self):
        self.copy_unit_to_networkd_unit_path('25-ipv6-address-label-section.network', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['ip', 'addrlabel', 'list']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '2004:da8:1::/64')

    def test_ipv6_neighbor(self):
        self.copy_unit_to_networkd_unit_path('25-neighbor-section.network', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['ip', 'neigh', 'list']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '192.168.10.1.*00:00:5e:00:02:65.*PERMANENT')
        self.assertRegex(output, '2004:da8:1::1.*00:00:5e:00:02:66.*PERMANENT')

    def test_sysctl(self):
        self.copy_unit_to_networkd_unit_path('25-sysctl.network', '12-dummy.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        self.assertEqual(self.read_ipv6_sysctl_attr('dummy98', 'forwarding'), '1')
        self.assertEqual(self.read_ipv6_sysctl_attr('dummy98', 'use_tempaddr'), '2')
        self.assertEqual(self.read_ipv6_sysctl_attr('dummy98', 'dad_transmits'), '3')
        self.assertEqual(self.read_ipv6_sysctl_attr('dummy98', 'hop_limit'), '5')
        self.assertEqual(self.read_ipv6_sysctl_attr('dummy98', 'proxy_ndp'), '1')
        self.assertEqual(self.read_ipv4_sysctl_attr('dummy98', 'forwarding'),'1')
        self.assertEqual(self.read_ipv4_sysctl_attr('dummy98', 'proxy_arp'), '1')

class NetworkdNetWorkBridgeTests(unittest.TestCase, Utilities):
    links = [
        'bridge99',
        'dummy98',
        'test1']

    units = [
        '11-dummy.netdev',
        '12-dummy.netdev',
        '26-bridge.netdev',
        '26-bridge-slave-interface-1.network',
        '26-bridge-slave-interface-2.network',
        'bridge99.network']

    def setUp(self):
        self.link_remove(self.links)

    def tearDown(self):
        self.link_remove(self.links)
        self.remove_unit_from_networkd_path(self.units)

    def test_bridge_property(self):
        self.copy_unit_to_networkd_unit_path('11-dummy.netdev', '12-dummy.netdev', '26-bridge.netdev',
                                             '26-bridge-slave-interface-1.network', '26-bridge-slave-interface-2.network',
                                             'bridge99.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))
        self.assertTrue(self.link_exits('test1'))
        self.assertTrue(self.link_exits('bridge99'))

        output = subprocess.check_output(['ip', '-d', 'link', 'show', 'test1']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'master')
        self.assertRegex(output, 'bridge')

        output = subprocess.check_output(['ip', '-d', 'link', 'show', 'dummy98']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'master')
        self.assertRegex(output, 'bridge')

        output = subprocess.check_output(['ip', 'addr', 'show', 'bridge99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '192.168.0.15')
        self.assertRegex(output, '192.168.0.1')

        output = subprocess.check_output(['bridge', '-d', 'link', 'show', 'dummy98']).rstrip().decode('utf-8')
        print(output)
        self.assertEqual(self.read_bridge_port_attr('bridge99', 'dummy98', 'hairpin_mode'), '1')
        self.assertEqual(self.read_bridge_port_attr('bridge99', 'dummy98', 'path_cost'), '400')
        self.assertEqual(self.read_bridge_port_attr('bridge99', 'dummy98', 'unicast_flood'), '1')
        self.assertEqual(self.read_bridge_port_attr('bridge99', 'dummy98', 'multicast_fast_leave'), '1')

        # CONFIG_BRIDGE_IGMP_SNOOPING=y
        if (os.path.exists('/sys/devices/virtual/net/bridge00/lower_dummy98/brport/multicast_to_unicast')):
            self.assertEqual(self.read_bridge_port_attr('bridge99', 'dummy98', 'multicast_to_unicast'), '1')

class NetworkdNetWorkLLDPTests(unittest.TestCase, Utilities):
    links = ['veth99']

    units = [
        '23-emit-lldp.network',
        '24-lldp.network',
        '25-veth.netdev']

    def setUp(self):
        self.link_remove(self.links)

    def tearDown(self):
        self.link_remove(self.links)
        self.remove_unit_from_networkd_path(self.units)

    def test_lldp(self):
        self.copy_unit_to_networkd_unit_path('23-emit-lldp.network', '24-lldp.network', '25-veth.netdev')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        output = subprocess.check_output(['networkctl', 'lldp']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'veth-peer')
        self.assertRegex(output, 'veth99')

class NetworkdNetworkRATests(unittest.TestCase, Utilities):
    links = ['veth99']

    units = [
        '25-veth.netdev',
        'ipv6-prefix.network',
        'ipv6-prefix-veth.network']

    def setUp(self):
        self.link_remove(self.links)

    def tearDown(self):
        self.link_remove(self.links)
        self.remove_unit_from_networkd_path(self.units)

    def test_ipv6_prefix_delegation(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'ipv6-prefix.network', 'ipv6-prefix-veth.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        output = subprocess.check_output(['networkctl', 'status', 'veth99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '2002:da8:1:0')

class NetworkdNetworkDHCPServerTests(unittest.TestCase, Utilities):
    links = [
        'dummy98',
        'veth99']

    units = [
        '12-dummy.netdev',
        '24-search-domain.network',
        '25-veth.netdev',
        'dhcp-client.network',
        'dhcp-client-timezone-router.network',
        'dhcp-server.network',
        'dhcp-server-timezone-router.network']

    def setUp(self):
        self.link_remove(self.links)

    def tearDown(self):
        self.link_remove(self.links)
        self.remove_unit_from_networkd_path(self.units)

    def test_dhcp_server(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-client.network', 'dhcp-server.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        output = subprocess.check_output(['networkctl', 'status', 'veth99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '192.168.5.*')
        self.assertRegex(output, 'Gateway: 192.168.5.1')
        self.assertRegex(output, 'DNS: 192.168.5.1')
        self.assertRegex(output, 'NTP: 192.168.5.1')

    def test_domain(self):
        self.copy_unit_to_networkd_unit_path( '12-dummy.netdev', '24-search-domain.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('dummy98'))

        output = subprocess.check_output(['networkctl', 'status', 'dummy98']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'Address: 192.168.42.100')
        self.assertRegex(output, 'DNS: 192.168.42.1')
        self.assertRegex(output, 'Search Domains: one')

    def test_emit_router_timezone(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-client-timezone-router.network', 'dhcp-server-timezone-router.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        output = subprocess.check_output(['networkctl', 'status', 'veth99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'Gateway: 192.168.5.*')
        self.assertRegex(output, '192.168.5.*')
        self.assertRegex(output, 'Europe/Berlin')

class NetworkdNetworkDHCPClientTests(unittest.TestCase, Utilities):
    links = [
        'dummy98',
        'veth99']

    units = [
        '25-veth.netdev',
        'dhcp-client-anonymize.network',
        'dhcp-client-critical-connection.network',
        'dhcp-client-ipv4-dhcp-settings.network',
        'dhcp-client-ipv4-only-ipv6-disabled.network',
        'dhcp-client-ipv4-only.network',
        'dhcp-client-ipv6-only.network',
        'dhcp-client-ipv6-rapid-commit.network',
        'dhcp-client-listen-port.network',
        'dhcp-client-route-metric.network',
        'dhcp-client-route-table.network',
        'dhcp-client.network'
        'dhcp-server-veth-peer.network',
        'dhcp-v4-server-veth-peer.network',
        'static.network']

    def setUp(self):
        self.link_remove(self.links)
        self.stop_dnsmasq(dnsmasq_pid_file)

    def tearDown(self):
        self.link_remove(self.links)
        self.remove_unit_from_networkd_path(self.units)
        self.stop_dnsmasq(dnsmasq_pid_file)
        self.remove_lease_file()
        self.remove_log_file()

    def test_dhcp_client_ipv6_only(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-server-veth-peer.network','dhcp-client-ipv6-only.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        self.start_dnsmasq()

        output = subprocess.check_output(['networkctl', 'status', 'veth99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '2600::')
        self.assertNotRegex(output, '192.168.5')

    def test_dhcp_client_ipv4_only(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-server-veth-peer.network','dhcp-client-ipv4-only-ipv6-disabled.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        self.start_dnsmasq()

        output = subprocess.check_output(['networkctl', 'status', 'veth99']).rstrip().decode('utf-8')
        print(output)
        self.assertNotRegex(output, '2600::')
        self.assertRegex(output, '192.168.5')

    def test_dhcp_client_ipv4_ipv6(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-server-veth-peer.network', 'dhcp-client-ipv6-only.network',
                                             'dhcp-client-ipv4-only.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        self.start_dnsmasq()

        output = subprocess.check_output(['networkctl', 'status', 'veth99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '2600::')
        self.assertRegex(output, '192.168.5')

    def test_dhcp_client_settings(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-server-veth-peer.network', 'dhcp-client-ipv4-dhcp-settings.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        self.start_dnsmasq()

        output = subprocess.check_output(['ip', 'address', 'show', 'dev', 'veth99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '12:34:56:78:9a:bc')
        self.assertRegex(output, '192.168.5')
        self.assertRegex(output, '1492')

        output = subprocess.check_output(['ip', 'route']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'default.*dev veth99 proto dhcp')

        self.assertTrue(self.search_words_in_dnsmasq_log('vendor class: SusantVendorTest', True))
        self.assertTrue(self.search_words_in_dnsmasq_log('DHCPDISCOVER(veth-peer) 12:34:56:78:9a:bc'))
        self.assertTrue(self.search_words_in_dnsmasq_log('client provides name: test-hostname'))
        self.assertTrue(self.search_words_in_dnsmasq_log('26:mtu'))

    def test_dhcp6_client_settings_rapidcommit_true(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-server-veth-peer.network', 'dhcp-client-ipv6-only.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        self.start_dnsmasq()

        output = subprocess.check_output(['ip', 'address', 'show', 'dev', 'veth99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '12:34:56:78:9a:bc')
        self.assertTrue(self.search_words_in_dnsmasq_log('14:rapid-commit', True))

    def test_dhcp6_client_settings_rapidcommit_false(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-server-veth-peer.network', 'dhcp-client-ipv6-rapid-commit.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        self.start_dnsmasq()

        output = subprocess.check_output(['ip', 'address', 'show', 'dev', 'veth99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '12:34:56:78:9a:bc')
        self.assertFalse(self.search_words_in_dnsmasq_log('14:rapid-commit', True))

    def test_dhcp_client_settings_anonymize(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-server-veth-peer.network', 'dhcp-client-anonymize.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        self.start_dnsmasq()

        self.assertFalse(self.search_words_in_dnsmasq_log('VendorClassIdentifier=SusantVendorTest', True))
        self.assertFalse(self.search_words_in_dnsmasq_log('test-hostname'))
        self.assertFalse(self.search_words_in_dnsmasq_log('26:mtu'))

    def test_dhcp_client_listen_port(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-server-veth-peer.network', 'dhcp-client-listen-port.network')

        dh_server = DHCPServer("dhcp_server")
        dh_server.start()

        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        global port
        global ip

        self.assertRegex(str(port), '5555')
        self.assertRegex(str(ip), '0.0.0.0')

        dh_server.join()

    def test_dhcp_route_table_id(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-v4-server-veth-peer.network', 'dhcp-client-route-table.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        self.start_dnsmasq()

        output = subprocess.check_output(['ip', 'route', 'show', 'table', '12']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'veth99 proto dhcp')
        self.assertRegex(output, '192.168.5.1')

    def test_dhcp_route_metric(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-v4-server-veth-peer.network', 'dhcp-client-route-metric.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        self.start_dnsmasq()

        output = subprocess.check_output(['ip', 'route', 'show', 'dev', 'veth99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, 'metric 24')

    def test_dhcp_route_criticalconnection_true(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-v4-server-veth-peer.network', 'dhcp-client-critical-connection.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        self.start_dnsmasq()

        output = subprocess.check_output(['networkctl', 'status', 'veth99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '192.168.5.*')

        # Stoping dnsmasq as networkd won't be allowed to renew the DHCP lease.
        self.stop_dnsmasq(dnsmasq_pid_file)

        # Sleep for 120 sec as the dnsmasq minimum lease time can only be set to 120
        time.sleep(125)

        output = subprocess.check_output(['networkctl', 'status', 'veth99']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '192.168.5.*')

    def test_dhcp_client_reuse_address_as_static(self):
        self.copy_unit_to_networkd_unit_path('25-veth.netdev', 'dhcp-server-veth-peer.network', 'dhcp-client.network')
        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        self.start_dnsmasq()

        output = subprocess.check_output(['ip', 'address', 'show', 'dev', 'veth99', 'scope', 'global']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '192.168.5')
        self.assertRegex(output, '2600::')

        ipv4_address = re.search('192\.168\.5\.[0-9]*/24', output)
        ipv6_address = re.search('2600::[0-9a-f:]*/128', output)
        static_network = '\n'.join(['[Match]', 'Name=veth99', '[Network]', 'IPv6AcceptRA=no', 'Address=' + ipv4_address.group(), 'Address=' + ipv6_address.group()])
        print(static_network)

        self.remove_unit_from_networkd_path(['dhcp-client.network'])

        with open(os.path.join(network_unit_file_path, 'static.network'), mode='w') as f:
            f.write(static_network)

        self.start_networkd()

        self.assertTrue(self.link_exits('veth99'))

        output = subprocess.check_output(['ip', '-4', 'address', 'show', 'dev', 'veth99', 'scope', 'global']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '192.168.5')
        self.assertRegex(output, 'valid_lft forever preferred_lft forever')

        output = subprocess.check_output(['ip', '-6', 'address', 'show', 'dev', 'veth99', 'scope', 'global']).rstrip().decode('utf-8')
        print(output)
        self.assertRegex(output, '2600::')
        self.assertRegex(output, 'valid_lft forever preferred_lft forever')

if __name__ == '__main__':
    unittest.main(testRunner=unittest.TextTestRunner(stream=sys.stdout,
                                                     verbosity=3))