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
|
import socket
from socket import AF_INET, AF_INET6
import struct
import pytest
from unittest.mock import Mock, patch, call
from sshuttle.helpers import Fatal
from sshuttle.methods import get_method
def test_get_supported_features():
method = get_method('nat')
features = method.get_supported_features()
assert features.ipv6
assert not features.udp
assert features.dns
def test_get_tcp_dstip():
sock = Mock()
sock.family = AF_INET
sock.getsockopt.return_value = struct.pack(
'!HHBBBB', socket.ntohs(AF_INET), 1024, 127, 0, 0, 1)
method = get_method('nat')
assert method.get_tcp_dstip(sock) == ('127.0.0.1', 1024)
assert sock.mock_calls == [call.getsockopt(0, 80, 16)]
sock = Mock()
sock.family = AF_INET6
sock.getsockopt.return_value = struct.pack(
'!HH4xBBBBBBBBBBBBBBBB', socket.ntohs(AF_INET6),
1024, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1)
method = get_method('nft')
assert method.get_tcp_dstip(sock) == ('::1', 1024)
assert sock.mock_calls == [call.getsockopt(41, 80, 64)]
def test_recv_udp():
sock = Mock()
sock.recvfrom.return_value = "11111", "127.0.0.1"
method = get_method('nat')
result = method.recv_udp(sock, 1024)
assert sock.mock_calls == [call.recvfrom(1024)]
assert result == ("127.0.0.1", None, "11111")
def test_send_udp():
sock = Mock()
method = get_method('nat')
method.send_udp(sock, None, "127.0.0.1", "22222")
assert sock.mock_calls == [call.sendto("22222", "127.0.0.1")]
def test_setup_tcp_listener():
listener = Mock()
method = get_method('nat')
method.setup_tcp_listener(listener)
assert listener.mock_calls == []
def test_setup_udp_listener():
listener = Mock()
method = get_method('nat')
method.setup_udp_listener(listener)
assert listener.mock_calls == []
def test_assert_features():
method = get_method('nat')
features = method.get_supported_features()
method.assert_features(features)
features.udp = True
with pytest.raises(Fatal):
method.assert_features(features)
features.ipv6 = True
with pytest.raises(Fatal):
method.assert_features(features)
def test_firewall_command():
method = get_method('nat')
assert not method.firewall_command("somthing")
@patch('sshuttle.methods.nat.ipt')
@patch('sshuttle.methods.nat.ipt_chain_exists')
def test_setup_firewall(mock_ipt_chain_exists, mock_ipt):
mock_ipt_chain_exists.return_value = True
method = get_method('nat')
assert method.name == 'nat'
assert mock_ipt_chain_exists.mock_calls == []
assert mock_ipt.mock_calls == []
method.setup_firewall(
1024, 1026,
[(AF_INET6, u'2404:6800:4004:80c::33')],
AF_INET6,
[(AF_INET6, 64, False, u'2404:6800:4004:80c::', 0, 0),
(AF_INET6, 128, True, u'2404:6800:4004:80c::101f', 80, 80)],
False,
None,
'0x01')
assert mock_ipt_chain_exists.mock_calls == [
call(AF_INET6, 'nat', 'sshuttle-1024')
]
assert mock_ipt.mock_calls == [
call(AF_INET6, 'nat', '-D', 'OUTPUT', '-j', 'sshuttle-1024'),
call(AF_INET6, 'nat', '-D', 'PREROUTING', '-j', 'sshuttle-1024'),
call(AF_INET6, 'nat', '-F', 'sshuttle-1024'),
call(AF_INET6, 'nat', '-X', 'sshuttle-1024'),
call(AF_INET6, 'nat', '-N', 'sshuttle-1024'),
call(AF_INET6, 'nat', '-F', 'sshuttle-1024'),
call(AF_INET6, 'nat', '-I', 'OUTPUT', '1', '-j', 'sshuttle-1024'),
call(AF_INET6, 'nat', '-I', 'PREROUTING', '1', '-j', 'sshuttle-1024'),
call(AF_INET6, 'nat', '-A', 'sshuttle-1024', '-j', 'REDIRECT',
'--dest', u'2404:6800:4004:80c::33', '-p', 'udp',
'--dport', '53', '--to-ports', '1026'),
call(AF_INET6, 'nat', '-A', 'sshuttle-1024', '-j', 'RETURN',
'-m', 'addrtype', '--dst-type', 'LOCAL'),
call(AF_INET6, 'nat', '-A', 'sshuttle-1024', '-j', 'RETURN',
'--dest', u'2404:6800:4004:80c::101f/128', '-p', 'tcp',
'--dport', '80:80'),
call(AF_INET6, 'nat', '-A', 'sshuttle-1024', '-j', 'REDIRECT',
'--dest', u'2404:6800:4004:80c::/64', '-p', 'tcp',
'--to-ports', '1024')
]
mock_ipt_chain_exists.reset_mock()
mock_ipt.reset_mock()
assert mock_ipt_chain_exists.mock_calls == []
assert mock_ipt.mock_calls == []
with pytest.raises(Exception) as excinfo:
method.setup_firewall(
1025, 1027,
[(AF_INET, u'1.2.3.33')],
AF_INET,
[(AF_INET, 24, False, u'1.2.3.0', 8000, 9000),
(AF_INET, 32, True, u'1.2.3.66', 8080, 8080)],
True,
None,
'0x01')
assert str(excinfo.value) == 'UDP not supported by nat method_name'
assert mock_ipt_chain_exists.mock_calls == []
assert mock_ipt.mock_calls == []
method.setup_firewall(
1025, 1027,
[(AF_INET, u'1.2.3.33')],
AF_INET,
[(AF_INET, 24, False, u'1.2.3.0', 8000, 9000),
(AF_INET, 32, True, u'1.2.3.66', 8080, 8080)],
False,
None,
'0x01')
assert mock_ipt_chain_exists.mock_calls == [
call(AF_INET, 'nat', 'sshuttle-1025')
]
assert mock_ipt.mock_calls == [
call(AF_INET, 'nat', '-D', 'OUTPUT', '-j', 'sshuttle-1025'),
call(AF_INET, 'nat', '-D', 'PREROUTING', '-j', 'sshuttle-1025'),
call(AF_INET, 'nat', '-F', 'sshuttle-1025'),
call(AF_INET, 'nat', '-X', 'sshuttle-1025'),
call(AF_INET, 'nat', '-N', 'sshuttle-1025'),
call(AF_INET, 'nat', '-F', 'sshuttle-1025'),
call(AF_INET, 'nat', '-I', 'OUTPUT', '1', '-j', 'sshuttle-1025'),
call(AF_INET, 'nat', '-I', 'PREROUTING', '1', '-j', 'sshuttle-1025'),
call(AF_INET, 'nat', '-A', 'sshuttle-1025', '-j', 'REDIRECT',
'--dest', u'1.2.3.33', '-p', 'udp',
'--dport', '53', '--to-ports', '1027'),
call(AF_INET, 'nat', '-A', 'sshuttle-1025', '-j', 'RETURN',
'-m', 'addrtype', '--dst-type', 'LOCAL'),
call(AF_INET, 'nat', '-A', 'sshuttle-1025', '-j', 'RETURN',
'--dest', u'1.2.3.66/32', '-p', 'tcp', '--dport', '8080:8080'),
call(AF_INET, 'nat', '-A', 'sshuttle-1025', '-j', 'REDIRECT',
'--dest', u'1.2.3.0/24', '-p', 'tcp', '--dport', '8000:9000',
'--to-ports', '1025')
]
mock_ipt_chain_exists.reset_mock()
mock_ipt.reset_mock()
method.restore_firewall(1025, AF_INET, False, None)
assert mock_ipt_chain_exists.mock_calls == [
call(AF_INET, 'nat', 'sshuttle-1025')
]
assert mock_ipt.mock_calls == [
call(AF_INET, 'nat', '-D', 'OUTPUT', '-j',
'sshuttle-1025'),
call(AF_INET, 'nat', '-D', 'PREROUTING', '-j',
'sshuttle-1025'),
call(AF_INET, 'nat', '-F', 'sshuttle-1025'),
call(AF_INET, 'nat', '-X', 'sshuttle-1025')
]
mock_ipt_chain_exists.reset_mock()
mock_ipt.reset_mock()
method.restore_firewall(1025, AF_INET6, False, None)
assert mock_ipt_chain_exists.mock_calls == [
call(AF_INET6, 'nat', 'sshuttle-1025')
]
assert mock_ipt.mock_calls == [
call(AF_INET6, 'nat', '-D', 'OUTPUT', '-j', 'sshuttle-1025'),
call(AF_INET6, 'nat', '-D', 'PREROUTING', '-j',
'sshuttle-1025'),
call(AF_INET6, 'nat', '-F', 'sshuttle-1025'),
call(AF_INET6, 'nat', '-X', 'sshuttle-1025')
]
mock_ipt_chain_exists.reset_mock()
mock_ipt.reset_mock()
|
