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#!/usr/bin/env python3
#
# Copyright (C) 2021-2024 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 os
import unittest
from base_vyostest_shim import VyOSUnitTestSHIM
from vyos.firewall import find_nftables_rule
from vyos.utils.file import read_file
base_path = ['system', 'conntrack']
def get_sysctl(parameter):
tmp = parameter.replace(r'.', r'/')
return read_file(f'/proc/sys/{tmp}')
class TestSystemConntrack(VyOSUnitTestSHIM.TestCase):
@classmethod
def setUpClass(cls):
super(TestSystemConntrack, 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()
def test_conntrack_options(self):
conntrack_config = {
'net.netfilter.nf_conntrack_expect_max' : {
'cli' : ['expect-table-size'],
'test_value' : '8192',
'default_value' : '2048',
},
'net.nf_conntrack_max' :{
'cli' : ['table-size'],
'test_value' : '500000',
'default_value' : '262144',
},
'net.ipv4.tcp_max_syn_backlog' :{
'cli' : ['tcp', 'half-open-connections'],
'test_value' : '2048',
'default_value' : '512',
},
'net.netfilter.nf_conntrack_tcp_loose' :{
'cli' : ['tcp', 'loose'],
'test_value' : 'disable',
'default_value' : '1',
},
'net.netfilter.nf_conntrack_tcp_max_retrans' :{
'cli' : ['tcp', 'max-retrans'],
'test_value' : '128',
'default_value' : '3',
},
}
for parameter, parameter_config in conntrack_config.items():
self.cli_set(base_path + parameter_config['cli'] + [parameter_config['test_value']])
# commit changes
self.cli_commit()
# validate configuration
for parameter, parameter_config in conntrack_config.items():
tmp = parameter_config['test_value']
# net.netfilter.nf_conntrack_tcp_loose has a fancy "disable" value,
# make this work
if tmp == 'disable':
tmp = '0'
self.assertEqual(get_sysctl(f'{parameter}'), tmp)
# delete all configuration options and revert back to defaults
self.cli_delete(base_path)
self.cli_commit()
# validate configuration
for parameter, parameter_config in conntrack_config.items():
self.assertEqual(get_sysctl(f'{parameter}'), parameter_config['default_value'])
def test_conntrack_module_enable(self):
# conntrack helper modules are disabled by default
modules = {
'ftp': {
'driver': ['nf_nat_ftp', 'nf_conntrack_ftp'],
'nftables': ['ct helper set "ftp_tcp"']
},
'h323': {
'driver': ['nf_nat_h323', 'nf_conntrack_h323'],
'nftables': ['ct helper set "ras_udp"',
'ct helper set "q931_tcp"']
},
'nfs': {
'nftables': ['ct helper set "rpc_tcp"',
'ct helper set "rpc_udp"']
},
'pptp': {
'driver': ['nf_nat_pptp', 'nf_conntrack_pptp'],
'nftables': ['ct helper set "pptp_tcp"']
},
'rtsp': {
'driver': ['nf_nat_rtsp', 'nf_conntrack_rtsp'],
'nftables': ['ct helper set "rtsp_tcp"']
},
'sip': {
'driver': ['nf_nat_sip', 'nf_conntrack_sip'],
'nftables': ['ct helper set "sip_tcp"',
'ct helper set "sip_udp"']
},
'sqlnet': {
'nftables': ['ct helper set "tns_tcp"']
},
'tftp': {
'driver': ['nf_nat_tftp', 'nf_conntrack_tftp'],
'nftables': ['ct helper set "tftp_udp"']
},
}
# load modules
for module in modules:
self.cli_set(base_path + ['modules', module])
# commit changes
self.cli_commit()
# verify modules are loaded on the system
for module, module_options in modules.items():
if 'driver' in module_options:
for driver in module_options['driver']:
self.assertTrue(os.path.isdir(f'/sys/module/{driver}'))
if 'nftables' in module_options:
for rule in module_options['nftables']:
self.assertTrue(find_nftables_rule('ip vyos_conntrack', 'VYOS_CT_HELPER', [rule]) != None)
# unload modules
for module in modules:
self.cli_delete(base_path + ['modules', module])
# commit changes
self.cli_commit()
# verify modules are not loaded on the system
for module, module_options in modules.items():
if 'driver' in module_options:
for driver in module_options['driver']:
self.assertFalse(os.path.isdir(f'/sys/module/{driver}'))
if 'nftables' in module_options:
for rule in module_options['nftables']:
self.assertTrue(find_nftables_rule('ip vyos_conntrack', 'VYOS_CT_HELPER', [rule]) == None)
def test_conntrack_hash_size(self):
hash_size = '65536'
hash_size_default = '32768'
self.cli_set(base_path + ['hash-size', hash_size])
# commit changes
self.cli_commit()
# verify new configuration - only effective after reboot, but
# a valid config file is sufficient
tmp = read_file('/etc/modprobe.d/vyatta_nf_conntrack.conf')
self.assertIn(hash_size, tmp)
# Test default value by deleting the configuration
self.cli_delete(base_path + ['hash-size'])
# commit changes
self.cli_commit()
# verify new configuration - only effective after reboot, but
# a valid config file is sufficient
tmp = read_file('/etc/modprobe.d/vyatta_nf_conntrack.conf')
self.assertIn(hash_size_default, tmp)
def test_conntrack_ignore(self):
address_group = 'conntracktest'
address_group_member = '192.168.0.1'
ipv6_address_group = 'conntracktest6'
ipv6_address_group_member = 'dead:beef::1'
self.cli_set(['firewall', 'group', 'address-group', address_group, 'address', address_group_member])
self.cli_set(['firewall', 'group', 'ipv6-address-group', ipv6_address_group, 'address', ipv6_address_group_member])
self.cli_set(base_path + ['ignore', 'ipv4', 'rule', '1', 'source', 'address', '192.0.2.1'])
self.cli_set(base_path + ['ignore', 'ipv4', 'rule', '1', 'destination', 'address', '192.0.2.2'])
self.cli_set(base_path + ['ignore', 'ipv4', 'rule', '1', 'destination', 'port', '22'])
self.cli_set(base_path + ['ignore', 'ipv4', 'rule', '1', 'protocol', 'tcp'])
self.cli_set(base_path + ['ignore', 'ipv4', 'rule', '1', 'tcp', 'flags', 'syn'])
self.cli_set(base_path + ['ignore', 'ipv4', 'rule', '2', 'source', 'address', '192.0.2.1'])
self.cli_set(base_path + ['ignore', 'ipv4', 'rule', '2', 'destination', 'group', 'address-group', address_group])
self.cli_set(base_path + ['ignore', 'ipv6', 'rule', '11', 'source', 'address', 'fe80::1'])
self.cli_set(base_path + ['ignore', 'ipv6', 'rule', '11', 'destination', 'address', 'fe80::2'])
self.cli_set(base_path + ['ignore', 'ipv6', 'rule', '11', 'destination', 'port', '22'])
self.cli_set(base_path + ['ignore', 'ipv6', 'rule', '11', 'protocol', 'tcp'])
self.cli_set(base_path + ['ignore', 'ipv6', 'rule', '12', 'source', 'address', 'fe80::1'])
self.cli_set(base_path + ['ignore', 'ipv6', 'rule', '12', 'destination', 'group', 'address-group', ipv6_address_group])
self.cli_set(base_path + ['ignore', 'ipv6', 'rule', '13', 'source', 'address', 'fe80::1'])
self.cli_set(base_path + ['ignore', 'ipv6', 'rule', '13', 'destination', 'address', '!fe80::3'])
self.cli_commit()
nftables_search = [
['ip saddr 192.0.2.1', 'ip daddr 192.0.2.2', 'tcp dport 22', 'tcp flags & syn == syn', 'notrack'],
['ip saddr 192.0.2.1', 'ip daddr @A_conntracktest', 'notrack']
]
nftables6_search = [
['ip6 saddr fe80::1', 'ip6 daddr fe80::2', 'tcp dport 22', 'notrack'],
['ip6 saddr fe80::1', 'ip6 daddr @A6_conntracktest6', 'notrack'],
['ip6 saddr fe80::1', 'ip6 daddr != fe80::3', 'notrack']
]
self.verify_nftables(nftables_search, 'ip vyos_conntrack')
self.verify_nftables(nftables6_search, 'ip6 vyos_conntrack')
self.cli_delete(['firewall'])
def test_conntrack_timeout_custom(self):
self.cli_set(base_path + ['timeout', 'custom', 'ipv4', 'rule', '1', 'source', 'address', '192.0.2.1'])
self.cli_set(base_path + ['timeout', 'custom', 'ipv4', 'rule', '1', 'destination', 'address', '192.0.2.2'])
self.cli_set(base_path + ['timeout', 'custom', 'ipv4', 'rule', '1', 'destination', 'port', '22'])
self.cli_set(base_path + ['timeout', 'custom', 'ipv4', 'rule', '1', 'protocol', 'tcp', 'syn-sent', '77'])
self.cli_set(base_path + ['timeout', 'custom', 'ipv4', 'rule', '1', 'protocol', 'tcp', 'close', '88'])
self.cli_set(base_path + ['timeout', 'custom', 'ipv4', 'rule', '1', 'protocol', 'tcp', 'established', '99'])
self.cli_set(base_path + ['timeout', 'custom', 'ipv4', 'rule', '2', 'inbound-interface', 'eth1'])
self.cli_set(base_path + ['timeout', 'custom', 'ipv4', 'rule', '2', 'source', 'address', '198.51.100.1'])
self.cli_set(base_path + ['timeout', 'custom', 'ipv4', 'rule', '2', 'protocol', 'udp', 'unreplied', '55'])
self.cli_set(base_path + ['timeout', 'custom', 'ipv6', 'rule', '1', 'source', 'address', '2001:db8::1'])
self.cli_set(base_path + ['timeout', 'custom', 'ipv6', 'rule', '1', 'inbound-interface', 'eth2'])
self.cli_set(base_path + ['timeout', 'custom', 'ipv6', 'rule', '1', 'protocol', 'tcp', 'time-wait', '22'])
self.cli_set(base_path + ['timeout', 'custom', 'ipv6', 'rule', '1', 'protocol', 'tcp', 'last-ack', '33'])
self.cli_commit()
nftables_search = [
['ct timeout ct-timeout-1 {'],
['protocol tcp'],
['policy = { syn_sent : 1m17s, established : 1m39s, close : 1m28s }'],
['ct timeout ct-timeout-2 {'],
['protocol udp'],
['policy = { unreplied : 55s }'],
['chain VYOS_CT_TIMEOUT {'],
['ip saddr 192.0.2.1', 'ip daddr 192.0.2.2', 'tcp dport 22', 'ct timeout set "ct-timeout-1"'],
['iifname "eth1"', 'meta l4proto udp', 'ip saddr 198.51.100.1', 'ct timeout set "ct-timeout-2"']
]
nftables6_search = [
['ct timeout ct-timeout-1 {'],
['protocol tcp'],
['policy = { last_ack : 33s, time_wait : 22s }'],
['chain VYOS_CT_TIMEOUT {'],
['iifname "eth2"', 'meta l4proto tcp', 'ip6 saddr 2001:db8::1', 'ct timeout set "ct-timeout-1"']
]
self.verify_nftables(nftables_search, 'ip vyos_conntrack')
self.verify_nftables(nftables6_search, 'ip6 vyos_conntrack')
self.cli_delete(['firewall'])
if __name__ == '__main__':
unittest.main(verbosity=2)
|
