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#!/usr/bin/env python3
#
# Copyright (C) 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 unittest
from base_vyostest_shim import VyOSUnitTestSHIM
from vyos.configsession import ConfigSessionError
from vyos.ifconfig import Section
from vyos.util import cmd
from vyos.util import process_named_running
from vyos.util import read_file
PROCESS_NAME = 'uacctd'
base_path = ['system', 'flow-accounting']
uacctd_conf = '/etc/pmacct/uacctd.conf'
class TestSystemFlowAccounting(VyOSUnitTestSHIM.TestCase):
@classmethod
def setUpClass(cls):
super(cls, cls).setUpClass()
# ensure we can also run this test on a live system - so lets clean
# out the current configuration :)
cls.cli_delete(cls, base_path)
def tearDown(self):
self.cli_delete(base_path)
self.cli_commit()
# after service removal process must no longer run
self.assertFalse(process_named_running(PROCESS_NAME))
def test_basic(self):
buffer_size = '5' # MiB
self.cli_set(base_path + ['buffer-size', buffer_size])
# You need to configure at least one interface for flow-accounting
with self.assertRaises(ConfigSessionError):
self.cli_commit()
for interface in Section.interfaces('ethernet'):
self.cli_set(base_path + ['interface', interface])
# commit changes
self.cli_commit()
# verify configuration
nftables_output = cmd('sudo nft list chain raw VYOS_CT_PREROUTING_HOOK').splitlines()
for interface in Section.interfaces('ethernet'):
rule_found = False
ifname_search = f'iifname "{interface}"'
for nftables_line in nftables_output:
if 'FLOW_ACCOUNTING_RULE' in nftables_line and ifname_search in nftables_line:
self.assertIn('group 2', nftables_line)
self.assertIn('snaplen 128', nftables_line)
self.assertIn('queue-threshold 100', nftables_line)
rule_found = True
break
self.assertTrue(rule_found)
uacctd = read_file(uacctd_conf)
# circular queue size - buffer_size
tmp = int(buffer_size) *1024 *1024
self.assertIn(f'plugin_pipe_size: {tmp}', uacctd)
# transfer buffer size - recommended value from pmacct developers 1/1000 of pipe size
tmp = int(buffer_size) *1024 *1024
# do an integer division
tmp //= 1000
self.assertIn(f'plugin_buffer_size: {tmp}', uacctd)
# Check for running process
self.assertTrue(process_named_running(PROCESS_NAME))
if __name__ == '__main__':
unittest.main(verbosity=2)
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