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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 os
import unittest
from netifaces import interfaces
from vyos.configsession import ConfigSession
from vyos.configsession import ConfigSessionError
from vyos.util import read_file
from vyos.validate import is_intf_addr_assigned
from vyos.ifconfig import Interface
class VRFTest(unittest.TestCase):
def setUp(self):
self.session = ConfigSession(os.getpid())
self._vrfs = ['red', 'green', 'blue']
def tearDown(self):
# delete all VRFs
self.session.delete(['vrf'])
self.session.commit()
del self.session
def test_vrf_table_id(self):
table = 1000
for vrf in self._vrfs:
base = ['vrf', 'name', vrf]
description = f'VyOS-VRF-{vrf}'
self.session.set(base + ['description', description])
if vrf == 'green':
self.session.set(base + ['disable'])
# check validate() - a table ID is mandatory
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(base + ['table', str(table)])
table += 1
# commit changes
self.session.commit()
# Verify VRF configuration
for vrf in self._vrfs:
description = f'VyOS-VRF-{vrf}'
self.assertTrue(vrf in interfaces())
vrf_if = Interface(vrf)
# validate proper interface description
self.assertEqual(vrf_if.get_alias(), description)
# validate admin up/down state of VRF
state = 'up'
if vrf == 'green':
state = 'down'
self.assertEqual(vrf_if.get_admin_state(), state)
def test_vrf_loopback_ips(self):
table = 1000
for vrf in self._vrfs:
base = ['vrf', 'name', vrf]
self.session.set(base + ['table', str(table)])
table += 1
# commit changes
self.session.commit()
# Verify VRF configuration
for vrf in self._vrfs:
self.assertTrue(vrf in interfaces())
self.assertTrue(is_intf_addr_assigned(vrf, '127.0.0.1'))
self.assertTrue(is_intf_addr_assigned(vrf, '::1'))
def test_vrf_table_id_is_unalterable(self):
# Linux Kernel prohibits the change of a VRF table on the fly.
# VRF must be deleted and recreated!
table = 666
vrf = self._vrfs[0]
base = ['vrf', 'name', vrf]
self.session.set(base + ['table', str(table)])
# commit changes
self.session.commit()
# Check if VRF has been created
self.assertTrue(vrf in interfaces())
table += 1
self.session.set(base + ['table', str(table)])
# check validate() - table ID can not be altered!
with self.assertRaises(ConfigSessionError):
self.session.commit()
if __name__ == '__main__':
unittest.main(verbosity=2)
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