1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
#!/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 re
import os
import json
import unittest
from netifaces import interfaces
from vyos.configsession import ConfigSession
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(unittest.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)
def setUp(self):
self.session = ConfigSession(os.getpid())
def tearDown(self):
# delete all VRFs
self.session.delete(base_path)
self.session.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.session.set(base + ['description', description])
# check validate() - a table ID is mandatory
with self.assertRaises(ConfigSessionError):
self.session.commit()
self.session.set(base + ['table', table])
if vrf == 'green':
self.session.set(base + ['disable'])
table = str(int(table) + 1)
# commit changes
self.session.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.session.set(base + ['table', str(table)])
table = str(int(table) + 1)
# commit changes
self.session.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.session.set(base + ['table', str(table)])
table = str(int(table) + 1)
self.session.set(base_path + ['bind-to-all'])
# commit changes
self.session.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.session.set(base + ['table', table])
# commit changes
self.session.commit()
# Check if VRF has been created
self.assertTrue(vrf in interfaces())
table = str(int(table) + 1)
self.session.set(base + ['table', table])
# check validate() - table ID can not be altered!
with self.assertRaises(ConfigSessionError):
self.session.commit()
def test_vrf_assign_interface(self):
vrf = vrfs[0]
table = '5000'
self.session.set(['vrf', 'name', vrf, 'table', table])
for interface in self._interfaces:
section = Section.section(interface)
self.session.set(['interfaces', section, interface, 'vrf', vrf])
# commit changes
self.session.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.session.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.session.set(base + ['table', str(table)])
# required interface for leaking to default table
self.session.set(['interfaces', 'ethernet', 'eth0', 'address', '192.0.2.1/24'])
# we also need an interface in "UP" state to install routes
self.session.set(['interfaces', 'dummy', f'dum{table}', 'vrf', vrf])
self.session.set(['interfaces', 'dummy', f'dum{table}', 'address', '192.0.2.1/24'])
self.session.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.session.set(proto_base + [route_type, route, 'next-hop', route_config['next_hop']])
if 'distance' in route_config:
self.session.set(proto_base + [route_type, route, 'next-hop', route_config['next_hop'], 'distance', route_config['distance']])
if 'next_hop_vrf' in route_config:
self.session.set(proto_base + [route_type, route, 'next-hop', route_config['next_hop'], 'next-hop-vrf', route_config['next_hop_vrf']])
# commit changes
self.session.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.session.delete(['protocols', 'vrf', vrf])
self.session.delete(['interfaces', 'dummy', f'dum{table}'])
self.session.delete(['interfaces', 'ethernet', 'eth0', 'address', '192.0.2.1/24'])
table = str(int(table) + 1)
if __name__ == '__main__':
unittest.main(verbosity=2)
|
