#!/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 . import re import os import json import unittest from base_vyostest_shim import VyOSUnitTestSHIM from netifaces import interfaces from vyos.configsession import ConfigSessionError from vyos.ifconfig import Interface from vyos.ifconfig import Section from vyos.template import is_ipv6 from vyos.util import cmd from vyos.util import read_file from vyos.validate import is_intf_addr_assigned base_path = ['vrf'] vrfs = ['red', 'green', 'blue', 'foo-bar', 'baz_foo'] def get_vrf_ipv4_routes(vrf): return json.loads(cmd(f'ip -4 -j route show vrf {vrf}')) def get_vrf_ipv6_routes(vrf): return json.loads(cmd(f'ip -6 -j route show vrf {vrf}')) 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(cls, 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_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]) 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)) table = str(int(table) + 1) def test_vrf_loopback_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 for vrf in 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_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 & cleanup for interface in self._interfaces: # os.readlink resolves to: '../../../../../virtual/net/foovrf' tmp = os.readlink(f'/sys/class/net/{interface}/master').split('/')[-1] self.assertEqual(tmp, vrf) # cleanup section = Section.section(interface) self.cli_delete(['interfaces', section, interface, 'vrf']) def test_vrf_static_routes(self): routes = { '10.0.0.0/8' : { 'next_hop' : '192.0.2.2', 'distance' : '200', 'next_hop_vrf' : 'default', }, '172.16.0.0/12' : { 'next_hop' : '192.0.2.3', 'next_hop_vrf' : 'default', }, '192.168.0.0/16' : { 'next_hop' : '192.0.2.3', }, '2001:db8:1000::/48' : { 'next_hop' : '2001:db8::2', }, } table = '2000' for vrf in vrfs: base = base_path + ['name', vrf] self.cli_set(base + ['table', str(table)]) # required interface for leaking to default table self.cli_set(['interfaces', 'ethernet', 'eth0', 'address', '192.0.2.1/24']) # we also need an interface in "UP" state to install routes self.cli_set(['interfaces', 'dummy', f'dum{table}', 'vrf', vrf]) self.cli_set(['interfaces', 'dummy', f'dum{table}', 'address', '192.0.2.1/24']) self.cli_set(['interfaces', 'dummy', f'dum{table}', 'address', '2001:db8::1/64']) table = str(int(table) + 1) proto_base = ['protocols', 'vrf', vrf, 'static'] for route, route_config in routes.items(): route_type = 'route' if is_ipv6(route): route_type = 'route6' self.cli_set(proto_base + [route_type, route, 'next-hop', route_config['next_hop']]) if 'distance' in route_config: self.cli_set(proto_base + [route_type, route, 'next-hop', route_config['next_hop'], 'distance', route_config['distance']]) if 'next_hop_vrf' in route_config: self.cli_set(proto_base + [route_type, route, 'next-hop', route_config['next_hop'], 'next-hop-vrf', route_config['next_hop_vrf']]) # commit changes self.cli_commit() # Verify routes table = '2000' for vrf in vrfs: for route, route_config in routes.items(): if is_ipv6(route): tmp = get_vrf_ipv6_routes(vrf) else: tmp = get_vrf_ipv4_routes(vrf) found = False for result in tmp: if 'dst' in result and result['dst'] == route: if 'gateway' in result and result['gateway'] == route_config['next_hop']: found = True self.assertTrue(found) # Cleanup self.cli_delete(['protocols', 'vrf', vrf]) self.cli_delete(['interfaces', 'dummy', f'dum{table}']) self.cli_delete(['interfaces', 'ethernet', 'eth0', 'address', '192.0.2.1/24']) table = str(int(table) + 1) if __name__ == '__main__': unittest.main(verbosity=2)