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#!/usr/bin/env python3
#
# Copyright (C) 2020-2021 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import unittest
import json
from vyos.configsession import ConfigSession
from vyos.configsession import ConfigSessionError
from vyos.util import cmd
from vyos.template import inc_ip
from base_interfaces_test import BasicInterfaceTest
remote_ip4 = '192.0.2.100'
remote_ip6 = '2001:db8::ffff'
source_if = 'dum2222'
mtu = 1476
def tunnel_conf(interface):
tmp = cmd(f'ip -d -j link show {interface}')
# {'address': '2.2.2.2',
# 'broadcast': '192.0.2.10',
# 'flags': ['POINTOPOINT', 'NOARP', 'UP', 'LOWER_UP'],
# 'group': 'default',
# 'gso_max_segs': 65535,
# 'gso_max_size': 65536,
# 'ifindex': 10,
# 'ifname': 'tun10',
# 'inet6_addr_gen_mode': 'none',
# 'link': None,
# 'link_pointtopoint': True,
# 'link_type': 'gre',
# 'linkinfo': {'info_data': {'local': '2.2.2.2',
# 'pmtudisc': True,
# 'remote': '192.0.2.10',
# 'tos': '0x1',
# 'ttl': 255},
# 'info_kind': 'gre'},
# 'linkmode': 'DEFAULT',
# 'max_mtu': 65511,
# 'min_mtu': 68,
# 'mtu': 1476,
# 'num_rx_queues': 1,
# 'num_tx_queues': 1,
# 'operstate': 'UNKNOWN',
# 'promiscuity': 0,
# 'qdisc': 'noqueue',
# 'txqlen': 1000}
return json.loads(tmp)[0]
class TunnelInterfaceTest(BasicInterfaceTest.BaseTest):
@classmethod
def setUpClass(cls):
cls._test_ip = True
cls._test_ipv6 = True
cls._test_mtu = True
cls._base_path = ['interfaces', 'tunnel']
cls.local_v4 = '192.0.2.1'
cls.local_v6 = '2001:db8::1'
cls._options = {
'tun10': ['encapsulation ipip', 'remote-ip 192.0.2.10', 'local-ip ' + cls.local_v4],
'tun20': ['encapsulation gre', 'remote-ip 192.0.2.20', 'local-ip ' + cls.local_v4],
}
cls._interfaces = list(cls._options)
def setUp(self):
super().setUp()
self.session.set(['interfaces', 'dummy', source_if, 'address', self.local_v4 + '/32'])
self.session.set(['interfaces', 'dummy', source_if, 'address', self.local_v6 + '/128'])
def tearDown(self):
self.session.delete(['interfaces', 'dummy', source_if])
super().tearDown()
def test_ipv4_encapsulations(self):
# When running tests ensure that for certain encapsulation types the
# local and remote IP address is actually an IPv4 address
interface = f'tun1000'
local_if_addr = f'10.10.200.1/24'
for encapsulation in ['ipip', 'sit', 'gre', 'gretap']:
self.session.set(self._base_path + [interface, 'address', local_if_addr])
self.session.set(self._base_path + [interface, 'encapsulation', encapsulation])
self.session.set(self._base_path + [interface, 'local-ip', self.local_v6])
self.session.set(self._base_path + [interface, 'remote-ip', remote_ip6])
# Encapsulation mode requires IPv4 local-ip
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(self._base_path + [interface, 'local-ip', self.local_v4])
# Encapsulation mode requires IPv4 local-ip
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(self._base_path + [interface, 'remote-ip', remote_ip4])
self.session.set(self._base_path + [interface, 'source-interface', source_if])
# Source interface can not be used with sit and gretap
if encapsulation in ['sit', 'gretap']:
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.delete(self._base_path + [interface, 'source-interface'])
# Check if commit is ok
self.session.commit()
conf = tunnel_conf(interface)
if encapsulation not in ['sit', 'gretap']:
self.assertEqual(source_if, conf['link'])
self.assertEqual(interface, conf['ifname'])
self.assertEqual(mtu, conf['mtu'])
self.assertEqual(encapsulation, conf['linkinfo']['info_kind'])
self.assertEqual(self.local_v4, conf['linkinfo']['info_data']['local'])
self.assertEqual(remote_ip4, conf['linkinfo']['info_data']['remote'])
self.assertTrue(conf['linkinfo']['info_data']['pmtudisc'])
# cleanup this instance
self.session.delete(self._base_path + [interface])
self.session.commit()
def test_ipv6_encapsulations(self):
# When running tests ensure that for certain encapsulation types the
# local and remote IP address is actually an IPv6 address
interface = f'tun1010'
local_if_addr = f'10.10.200.1/24'
for encapsulation in ['ipip6', 'ip6ip6', 'ip6gre']:
self.session.set(self._base_path + [interface, 'address', local_if_addr])
self.session.set(self._base_path + [interface, 'encapsulation', encapsulation])
self.session.set(self._base_path + [interface, 'local-ip', self.local_v4])
self.session.set(self._base_path + [interface, 'remote-ip', remote_ip4])
# Encapsulation mode requires IPv6 local-ip
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(self._base_path + [interface, 'local-ip', self.local_v6])
# Encapsulation mode requires IPv6 local-ip
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(self._base_path + [interface, 'remote-ip', remote_ip6])
# Configure Tunnel Source interface
self.session.set(self._base_path + [interface, 'source-interface', source_if])
# Check if commit is ok
self.session.commit()
conf = tunnel_conf(interface)
self.assertEqual(interface, conf['ifname'])
self.assertEqual(mtu, conf['mtu'])
self.assertEqual(source_if, conf['link'])
# Not applicable for ip6gre
if 'proto' in conf['linkinfo']['info_data']:
self.assertEqual(encapsulation, conf['linkinfo']['info_data']['proto'])
# remap encapsulation protocol(s) only for ipip6, ip6ip6
if encapsulation in ['ipip6', 'ip6ip6']:
encapsulation = 'ip6tnl'
self.assertEqual(encapsulation, conf['linkinfo']['info_kind'])
self.assertEqual(self.local_v6, conf['linkinfo']['info_data']['local'])
self.assertEqual(remote_ip6, conf['linkinfo']['info_data']['remote'])
# cleanup this instance
self.session.delete(self._base_path + [interface])
self.session.commit()
def test_tunnel_verify_local_dhcp(self):
# We can not use local-ip and dhcp-interface at the same time
interface = f'tun1020'
local_if_addr = f'10.0.0.1/24'
self.session.set(self._base_path + [interface, 'address', local_if_addr])
self.session.set(self._base_path + [interface, 'encapsulation', 'gre'])
self.session.set(self._base_path + [interface, 'local-ip', self.local_v4])
self.session.set(self._base_path + [interface, 'remote-ip', remote_ip4])
self.session.set(self._base_path + [interface, 'dhcp-interface', 'eth0'])
# local-ip and dhcp-interface can not be used at the same time
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.delete(self._base_path + [interface, 'dhcp-interface'])
# Check if commit is ok
self.session.commit()
def test_tunnel_parameters_gre(self):
interface = f'tun1030'
gre_key = '10'
encapsulation = 'gre'
tos = '20'
self.session.set(self._base_path + [interface, 'encapsulation', encapsulation])
self.session.set(self._base_path + [interface, 'local-ip', self.local_v4])
self.session.set(self._base_path + [interface, 'remote-ip', remote_ip4])
self.session.set(self._base_path + [interface, 'parameters', 'ip', 'no-pmtu-discovery'])
self.session.set(self._base_path + [interface, 'parameters', 'ip', 'key', gre_key])
self.session.set(self._base_path + [interface, 'parameters', 'ip', 'tos', tos])
# Check if commit is ok
self.session.commit()
conf = tunnel_conf(interface)
self.assertEqual(mtu, conf['mtu'])
self.assertEqual(interface, conf['ifname'])
self.assertEqual(encapsulation, conf['linkinfo']['info_kind'])
self.assertEqual(self.local_v4, conf['linkinfo']['info_data']['local'])
self.assertEqual(remote_ip4, conf['linkinfo']['info_data']['remote'])
self.assertEqual(0, conf['linkinfo']['info_data']['ttl'])
self.assertFalse( conf['linkinfo']['info_data']['pmtudisc'])
def test_gretap_parameters_change(self):
interface = f'tun1040'
gre_key = '10'
encapsulation = 'gretap'
tos = '20'
self.session.set(self._base_path + [interface, 'encapsulation', encapsulation])
self.session.set(self._base_path + [interface, 'local-ip', self.local_v4])
self.session.set(self._base_path + [interface, 'remote-ip', remote_ip4])
# Check if commit is ok
self.session.commit()
conf = tunnel_conf(interface)
self.assertEqual(mtu, conf['mtu'])
self.assertEqual(interface, conf['ifname'])
self.assertEqual(encapsulation, conf['linkinfo']['info_kind'])
self.assertEqual(self.local_v4, conf['linkinfo']['info_data']['local'])
self.assertEqual(remote_ip4, conf['linkinfo']['info_data']['remote'])
self.assertEqual(0, conf['linkinfo']['info_data']['ttl'])
# Change remote-ip (inc host by 2
new_remote = inc_ip(remote_ip4, 2)
self.session.set(self._base_path + [interface, 'remote-ip', new_remote])
# Check if commit is ok
self.session.commit()
conf = tunnel_conf(interface)
self.assertEqual(new_remote, conf['linkinfo']['info_data']['remote'])
if __name__ == '__main__':
unittest.main(verbosity=2)
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