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
|
#!/usr/bin/env python3
#
# Copyright (C) 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.configsession import ConfigSessionError
base_path = ['nat', 'cgnat']
nftables_cgnat_config = '/run/nftables-cgnat.nft'
class TestCGNAT(VyOSUnitTestSHIM.TestCase):
@classmethod
def setUpClass(cls):
super(TestCGNAT, 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()
self.assertFalse(os.path.exists(nftables_cgnat_config))
def test_cgnat(self):
internal_name = 'vyos-int-01'
external_name = 'vyos-ext-01'
internal_net = '100.64.0.0/29'
external_net = '192.0.2.1-192.0.2.2'
external_ports = '40000-60000'
ports_per_subscriber = '5000'
rule = '100'
nftables_search = [
['map tcp_nat_map'],
['map udp_nat_map'],
['map icmp_nat_map'],
['map other_nat_map'],
['100.64.0.0 : 192.0.2.1 . 40000-44999'],
['100.64.0.1 : 192.0.2.1 . 45000-49999'],
['100.64.0.2 : 192.0.2.1 . 50000-54999'],
['100.64.0.3 : 192.0.2.1 . 55000-59999'],
['100.64.0.4 : 192.0.2.2 . 40000-44999'],
['100.64.0.5 : 192.0.2.2 . 45000-49999'],
['100.64.0.6 : 192.0.2.2 . 50000-54999'],
['100.64.0.7 : 192.0.2.2 . 55000-59999'],
['chain POSTROUTING'],
['type nat hook postrouting priority srcnat'],
['ip protocol tcp counter snat ip to ip saddr map @tcp_nat_map'],
['ip protocol udp counter snat ip to ip saddr map @udp_nat_map'],
['ip protocol icmp counter snat ip to ip saddr map @icmp_nat_map'],
['counter snat ip to ip saddr map @other_nat_map'],
]
self.cli_set(base_path + ['pool', 'external', external_name, 'external-port-range', external_ports])
self.cli_set(base_path + ['pool', 'external', external_name, 'range', external_net])
# allocation out of the available ports
with self.assertRaises(ConfigSessionError):
self.cli_set(base_path + ['pool', 'external', external_name, 'per-user-limit', 'port', '8000'])
self.cli_commit()
self.cli_set(base_path + ['pool', 'external', external_name, 'per-user-limit', 'port', ports_per_subscriber])
# internal pool not set
with self.assertRaises(ConfigSessionError):
self.cli_commit()
self.cli_set(base_path + ['pool', 'internal', internal_name, 'range', internal_net])
self.cli_set(base_path + ['rule', rule, 'source', 'pool', internal_name])
# non-exist translation pool
with self.assertRaises(ConfigSessionError):
self.cli_set(base_path + ['rule', rule, 'translation', 'pool', 'fake-pool'])
self.cli_commit()
self.cli_set(base_path + ['rule', rule, 'translation', 'pool', external_name])
self.cli_commit()
self.verify_nftables(nftables_search, 'ip cgnat', inverse=False, args='-s')
def test_cgnat_sequence(self):
internal_name = 'earth'
external_name = 'milky_way'
internal_net = '100.64.0.0/28'
ext_addr_alpha_proxima = '192.0.2.121/32'
ext_addr_beta_cygni = '198.51.100.23/32'
ext_addr_gamma_leonis = '203.0.113.102/32'
ext_seq_beta_cygni = '3'
ext_seq_gamma_leonis = '10'
external_ports = '1024-65535'
ports_per_subscriber = '10000'
rule = '100'
nftables_search = [
['100.64.0.0 : 198.51.100.23 . 1024-11023, 100.64.0.1 : 198.51.100.23 . 11024-21023'],
['100.64.0.4 : 198.51.100.23 . 41024-51023, 100.64.0.5 : 198.51.100.23 . 51024-61023'],
['100.64.0.6 : 203.0.113.102 . 1024-11023, 100.64.0.7 : 203.0.113.102 . 11024-21023'],
['100.64.0.8 : 203.0.113.102 . 21024-31023, 100.64.0.9 : 203.0.113.102 . 31024-41023'],
['100.64.0.10 : 203.0.113.102 . 41024-51023, 100.64.0.11 : 203.0.113.102 . 51024-61023'],
['100.64.0.12 : 192.0.2.121 . 1024-11023, 100.64.0.13 : 192.0.2.121 . 11024-21023'],
['100.64.0.14 : 192.0.2.121 . 21024-31023, 100.64.0.15 : 192.0.2.121 . 31024-41023'],
]
self.cli_set(base_path + ['pool', 'external', external_name, 'external-port-range', external_ports])
self.cli_set(base_path + ['pool', 'external', external_name, 'per-user-limit', 'port', ports_per_subscriber])
self.cli_set(base_path + ['pool', 'external', external_name, 'range', ext_addr_alpha_proxima])
self.cli_set(base_path + ['pool', 'external', external_name, 'range', ext_addr_beta_cygni, 'seq', ext_seq_beta_cygni])
self.cli_set(base_path + ['pool', 'external', external_name, 'range', ext_addr_gamma_leonis, 'seq', ext_seq_gamma_leonis])
self.cli_set(base_path + ['pool', 'internal', internal_name, 'range', internal_net])
self.cli_set(base_path + ['rule', rule, 'source', 'pool', internal_name])
self.cli_set(base_path + ['rule', rule, 'translation', 'pool', external_name])
self.cli_commit()
self.verify_nftables(nftables_search, 'ip cgnat', inverse=False, args='-s')
if __name__ == '__main__':
unittest.main(verbosity=2)
|
