#!/usr/bin/env python3 # # Copyright (C) 2020-2022 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 re import os import json import unittest from netifaces import interfaces from base_vyostest_shim import VyOSUnitTestSHIM from vyos.configsession import ConfigSessionError from vyos.ifconfig import Interface from vyos.ifconfig import Section from vyos.template import is_ipv4 from vyos.util import cmd from vyos.util import read_file from vyos.util import get_interface_config from vyos.validate import is_intf_addr_assigned base_path = ['vrf'] vrfs = ['red', 'green', 'blue', 'foo-bar', 'baz_foo'] class VRFTest(VyOSUnitTestSHIM.TestCase): _interfaces = [] @classmethod def setUpClass(cls): # we need to filter out VLAN interfaces identified by a dot (.) # in their name - just in case! if 'TEST_ETH' in os.environ: tmp = os.environ['TEST_ETH'].split() cls._interfaces = tmp else: for tmp in Section.interfaces('ethernet'): if not '.' in tmp: cls._interfaces.append(tmp) # call base-classes classmethod super(VRFTest, cls).setUpClass() def tearDown(self): # delete all VRFs self.cli_delete(base_path) self.cli_commit() for vrf in vrfs: self.assertNotIn(vrf, interfaces()) def test_vrf_vni_and_table_id(self): table = '1000' for vrf in vrfs: base = base_path + ['name', vrf] description = f'VyOS-VRF-{vrf}' self.cli_set(base + ['description', description]) # check validate() - a table ID is mandatory with self.assertRaises(ConfigSessionError): self.cli_commit() self.cli_set(base + ['table', table]) self.cli_set(base + ['vni', table]) if vrf == 'green': self.cli_set(base + ['disable']) table = str(int(table) + 1) # commit changes self.cli_commit() # Verify VRF configuration table = '1000' iproute2_config = read_file('/etc/iproute2/rt_tables.d/vyos-vrf.conf') for vrf in 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) # Test the iproute2 lookup file, syntax is as follows: # # # id vrf name comment # 1000 red # VyOS-VRF-red # 1001 green # VyOS-VRF-green # ... regex = f'{table}\s+{vrf}\s+#\s+{description}' self.assertTrue(re.findall(regex, iproute2_config)) frrconfig = self.getFRRconfig(f'vrf {vrf}') self.assertIn(f' vni {table}', frrconfig) tmp = get_interface_config(vrf) self.assertEqual(int(table), tmp['linkinfo']['info_data']['table']) # Increment table ID for the next run table = str(int(table) + 1) def test_vrf_loopbacks_ips(self): table = '2000' for vrf in vrfs: base = base_path + ['name', vrf] self.cli_set(base + ['table', str(table)]) table = str(int(table) + 1) # commit changes self.cli_commit() # Verify VRF configuration loopbacks = ['127.0.0.1', '::1'] for vrf in vrfs: # Ensure VRF was created self.assertIn(vrf, interfaces()) # Verify IP forwarding is 1 (enabled) self.assertEqual(read_file(f'/proc/sys/net/ipv4/conf/{vrf}/forwarding'), '1') self.assertEqual(read_file(f'/proc/sys/net/ipv6/conf/{vrf}/forwarding'), '1') # Test for proper loopback IP assignment for addr in loopbacks: self.assertTrue(is_intf_addr_assigned(vrf, addr)) def test_vrf_bind_all(self): table = '2000' for vrf in vrfs: base = base_path + ['name', vrf] self.cli_set(base + ['table', str(table)]) table = str(int(table) + 1) self.cli_set(base_path + ['bind-to-all']) # commit changes self.cli_commit() # Verify VRF configuration tmp = read_file('/proc/sys/net/ipv4/tcp_l3mdev_accept') self.assertIn(tmp, '1') tmp = read_file('/proc/sys/net/ipv4/udp_l3mdev_accept') self.assertIn(tmp, '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 = '1000' vrf = vrfs[0] base = base_path + ['name', vrf] self.cli_set(base + ['table', table]) # commit changes self.cli_commit() # Check if VRF has been created self.assertTrue(vrf in interfaces()) table = str(int(table) + 1) self.cli_set(base + ['table', table]) # check validate() - table ID can not be altered! with self.assertRaises(ConfigSessionError): self.cli_commit() def test_vrf_assign_interface(self): vrf = vrfs[0] table = '5000' self.cli_set(['vrf', 'name', vrf, 'table', table]) for interface in self._interfaces: section = Section.section(interface) self.cli_set(['interfaces', section, interface, 'vrf', vrf]) # commit changes self.cli_commit() # Verify VRF assignmant for interface in self._interfaces: tmp = get_interface_config(interface) self.assertEqual(vrf, tmp['master']) # cleanup section = Section.section(interface) self.cli_delete(['interfaces', section, interface, 'vrf']) def test_vrf_static_route(self): table = '100' for vrf in vrfs: next_hop = f'192.0.{table}.1' prefix = f'10.0.{table}.0/24' base = base_path + ['name', vrf] self.cli_set(base + ['vni', table]) # check validate() - a table ID is mandatory with self.assertRaises(ConfigSessionError): self.cli_commit() self.cli_set(base + ['table', table]) self.cli_set(base + ['protocols', 'static', 'route', prefix, 'next-hop', next_hop]) table = str(int(table) + 1) # commit changes self.cli_commit() # Verify VRF configuration table = '100' for vrf in vrfs: next_hop = f'192.0.{table}.1' prefix = f'10.0.{table}.0/24' self.assertTrue(vrf in interfaces()) vrf_if = Interface(vrf) frrconfig = self.getFRRconfig(f'vrf {vrf}') self.assertIn(f' vni {table}', frrconfig) self.assertIn(f' ip route {prefix} {next_hop}', frrconfig) # Increment table ID for the next run table = str(int(table) + 1) def test_vrf_link_local_ip_addresses(self): # Testcase for issue T4331 table = '100' vrf = 'orange' interface = 'dum9998' addresses = ['192.0.2.1/26', '2001:db8:9998::1/64', 'fe80::1/64'] for address in addresses: self.cli_set(['interfaces', 'dummy', interface, 'address', address]) # Create dummy interfaces self.cli_commit() # ... and verify IP addresses got assigned for address in addresses: self.assertTrue(is_intf_addr_assigned(interface, address)) # Move interface to VRF self.cli_set(base_path + ['name', vrf, 'table', table]) self.cli_set(['interfaces', 'dummy', interface, 'vrf', vrf]) # Apply VRF config self.cli_commit() # Ensure VRF got created self.assertIn(vrf, interfaces()) # ... and IP addresses are still assigned for address in addresses: self.assertTrue(is_intf_addr_assigned(interface, address)) # Verify VRF table ID tmp = get_interface_config(vrf) self.assertEqual(int(table), tmp['linkinfo']['info_data']['table']) # Verify interface is assigned to VRF tmp = get_interface_config(interface) self.assertEqual(vrf, tmp['master']) # Delete Interface self.cli_delete(['interfaces', 'dummy', interface]) self.cli_commit() def test_vrf_disable_forwarding(self): table = '2000' for vrf in vrfs: base = base_path + ['name', vrf] self.cli_set(base + ['table', table]) self.cli_set(base + ['ip', 'disable-forwarding']) self.cli_set(base + ['ipv6', 'disable-forwarding']) table = str(int(table) + 1) # commit changes self.cli_commit() # Verify VRF configuration loopbacks = ['127.0.0.1', '::1'] for vrf in vrfs: # Ensure VRF was created self.assertIn(vrf, interfaces()) # Verify IP forwarding is 0 (disabled) self.assertEqual(read_file(f'/proc/sys/net/ipv4/conf/{vrf}/forwarding'), '0') self.assertEqual(read_file(f'/proc/sys/net/ipv6/conf/{vrf}/forwarding'), '0') if __name__ == '__main__': unittest.main(verbosity=2)