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#!/usr/bin/env python3
#
# Copyright (C) 2020 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 base_interfaces_test import BasicInterfaceTest
mtu = 1500
def erspan_conf(interface):
tmp = cmd(f'ip -d -j link show {interface}')
'''
[
{
"ifindex": 17,
"link": null,
"ifname": "ersp0",
"flags": [
"BROADCAST",
"MULTICAST"
],
"mtu": 1450,
"qdisc": "noop",
"operstate": "DOWN",
"linkmode": "DEFAULT",
"group": "default",
"txqlen": 1000,
"link_type": "ether",
"address": "22:27:14:7b:0d:79",
"broadcast": "ff:ff:ff:ff:ff:ff",
"promiscuity": 0,
"min_mtu": 68,
"max_mtu": 0,
"linkinfo": {
"info_kind": "erspan",
"info_data": {
"remote": "10.2.2.2",
"local": "10.1.1.1",
"ttl": 0,
"pmtudisc": true,
"ikey": "0.0.0.123",
"okey": "0.0.0.123",
"iseq": true,
"oseq": true,
"erspan_index": 0,
"erspan_ver": 1
}
},
"inet6_addr_gen_mode": "eui64",
"num_tx_queues": 1,
"num_rx_queues": 1,
"gso_max_size": 65536,
"gso_max_segs": 65535
}
]
'''
return json.loads(tmp)[0]
class ERSPanTunnelInterfaceTest(BasicInterfaceTest.BaseTest):
def setUp(self):
super().setUp()
self._base_path = ['interfaces', 'erspan']
self._test_mtu = True
self.local_v4 = '10.1.1.1'
self.local_v6 = '2001:db8::1'
self.remote_v4 = '10.2.2.2'
self.remote_v6 = '2001:db9::1'
def tearDown(self):
self.session.delete(['interfaces', 'erspan'])
super().tearDown()
def test_erspan_ipv4(self):
interface = 'ersp100'
encapsulation = 'erspan'
address_v4 = '10.1.1.1/24'
key = 123
self.session.set(self._base_path + [interface, 'address', address_v4])
# Must configure the ERSPAN tunnel encapsulation for ersp100
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(self._base_path + [interface, 'encapsulation', encapsulation])
# local-ip is mandatory for ERSPAN tunnel
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(self._base_path + [interface, 'local-ip', self.local_v4])
self.session.set(self._base_path + [interface, 'remote-ip', self.remote_v4])
self.session.set(self._base_path + [interface, 'parameters', 'ip' , 'key', str(key)])
self.session.commit()
conf = erspan_conf(interface)
self.assertEqual(interface, conf['ifname'])
self.assertEqual(encapsulation, conf['linkinfo']['info_kind'])
self.assertEqual(mtu, conf['mtu'])
self.assertEqual(self.local_v4, conf['linkinfo']['info_data']['local'])
self.assertEqual(self.remote_v4, conf['linkinfo']['info_data']['remote'])
def test_erspan_ipv6(self):
interface = 'ersp1000'
encapsulation = 'ip6erspan'
address_v6 = '2001:db8::1/24'
key = 123
self.session.set(self._base_path + [interface, 'address', address_v6])
# Must configure the ERSPAN tunnel encapsulation for ersp100
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(self._base_path + [interface, 'encapsulation', encapsulation])
# local-ip is mandatory for ERSPAN tunnel
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(self._base_path + [interface, 'local-ip', self.local_v6])
self.session.set(self._base_path + [interface, 'remote-ip', self.remote_v6])
self.session.set(self._base_path + [interface, 'parameters', 'ip' , 'key', str(key)])
self.session.commit()
conf = erspan_conf(interface)
self.assertEqual(interface, conf['ifname'])
self.assertEqual(encapsulation, conf['linkinfo']['info_kind'])
self.assertEqual(mtu, conf['mtu'])
self.assertEqual(self.local_v6, conf['linkinfo']['info_data']['local'])
self.assertEqual(self.remote_v6, conf['linkinfo']['info_data']['remote'])
if __name__ == '__main__':
unittest.main()
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