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#!/usr/bin/env python3
#
# Copyright (C) 2023-2024 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
from base_vyostest_shim import VyOSUnitTestSHIM
from base_vyostest_shim import CSTORE_GUARD_TIME
from vyos.configsession import ConfigSessionError
from vyos.ifconfig import Section
from vyos.frrender import zebra_daemon
from vyos.utils.process import process_named_running
from vyos.utils.system import sysctl_read
base_path = ['protocols', 'segment-routing']
class TestProtocolsSegmentRouting(VyOSUnitTestSHIM.TestCase):
@classmethod
def setUpClass(cls):
# call base-classes classmethod
super(TestProtocolsSegmentRouting, cls).setUpClass()
# Retrieve FRR daemon PID - it is not allowed to crash, thus PID must remain the same
cls.daemon_pid = process_named_running(zebra_daemon)
# ensure we can also run this test on a live system - so lets clean
# out the current configuration :)
cls.cli_delete(cls, base_path)
# Enable CSTORE guard time required by FRR related tests
cls._commit_guard_time = CSTORE_GUARD_TIME
def tearDown(self):
self.cli_delete(base_path)
self.cli_commit()
# check process health and continuity
self.assertEqual(self.daemon_pid, process_named_running(zebra_daemon))
def test_srv6(self):
interfaces = Section.interfaces('ethernet', vlan=False)
locators = {
'foo1': {'prefix': '2001:a::/64'},
'foo2': {'prefix': '2001:b::/64', 'usid': {}},
'foo3': {'prefix': '2001:c::/64', 'format': 'uncompressed-f4024'},
'foo4': {
'prefix': '2001:d::/48',
'block-len': '32',
'node-len': '16',
'func-bits': '16',
'usid': {},
'format': 'usid-f3216',
},
}
for locator, locator_config in locators.items():
self.cli_set(
base_path
+ ['srv6', 'locator', locator, 'prefix', locator_config['prefix']]
)
if 'block-len' in locator_config:
self.cli_set(
base_path
+ [
'srv6',
'locator',
locator,
'block-len',
locator_config['block-len'],
]
)
if 'node-len' in locator_config:
self.cli_set(
base_path
+ [
'srv6',
'locator',
locator,
'node-len',
locator_config['node-len'],
]
)
if 'func-bits' in locator_config:
self.cli_set(
base_path
+ [
'srv6',
'locator',
locator,
'func-bits',
locator_config['func-bits'],
]
)
if 'usid' in locator_config:
self.cli_set(base_path + ['srv6', 'locator', locator, 'behavior-usid'])
if 'format' in locator_config:
self.cli_set(
base_path
+ ['srv6', 'locator', locator, 'format', locator_config['format']]
)
# verify() - SRv6 should be enabled on at least one interface!
with self.assertRaises(ConfigSessionError):
self.cli_commit()
for interface in interfaces:
self.cli_set(base_path + ['interface', interface, 'srv6'])
self.cli_commit()
for interface in interfaces:
self.assertEqual(
sysctl_read(f'net.ipv6.conf.{interface}.seg6_enabled'), '1'
)
self.assertEqual(
sysctl_read(f'net.ipv6.conf.{interface}.seg6_require_hmac'), '0'
) # default
frrconfig = self.getFRRconfig('segment-routing', endsection='^exit')
self.assertIn('segment-routing', frrconfig)
self.assertIn(' srv6', frrconfig)
self.assertIn(' locators', frrconfig)
for locator, locator_config in locators.items():
prefix = locator_config['prefix']
block_len = locator_config.get('block-len', '40')
node_len = locator_config.get('node-len', '24')
func_bits = locator_config.get('func-bits', '16')
self.assertIn(f' locator {locator}', frrconfig)
self.assertIn(
f' prefix {prefix} block-len {block_len} node-len {node_len} func-bits {func_bits}',
frrconfig,
)
if 'format' in locator_config:
self.assertIn(f' format {locator_config["format"]}', frrconfig)
if 'usid' in locator_config:
self.assertIn(' behavior usid', frrconfig)
def test_srv6_sysctl(self):
interfaces = Section.interfaces('ethernet', vlan=False)
# HMAC accept
for interface in interfaces:
self.cli_set(base_path + ['interface', interface, 'srv6'])
self.cli_set(base_path + ['interface', interface, 'srv6', 'hmac', 'ignore'])
self.cli_commit()
for interface in interfaces:
self.assertEqual(
sysctl_read(f'net.ipv6.conf.{interface}.seg6_enabled'), '1'
)
self.assertEqual(
sysctl_read(f'net.ipv6.conf.{interface}.seg6_require_hmac'), '-1'
) # ignore
# HMAC drop
for interface in interfaces:
self.cli_set(base_path + ['interface', interface, 'srv6'])
self.cli_set(base_path + ['interface', interface, 'srv6', 'hmac', 'drop'])
self.cli_commit()
for interface in interfaces:
self.assertEqual(
sysctl_read(f'net.ipv6.conf.{interface}.seg6_enabled'), '1'
)
self.assertEqual(
sysctl_read(f'net.ipv6.conf.{interface}.seg6_require_hmac'), '1'
) # drop
# Disable SRv6 on first interface
first_if = interfaces[-1]
self.cli_delete(base_path + ['interface', first_if])
self.cli_commit()
self.assertEqual(sysctl_read(f'net.ipv6.conf.{first_if}.seg6_enabled'), '0')
if __name__ == '__main__':
unittest.main(verbosity=2)
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