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
|
#!/usr/bin/env python3
# Copyright (c) 2017-2019 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test message sending before handshake completion.
A node should never send anything other than VERSION/VERACK until it's
received a VERACK.
This test connects to a node and sends it a few messages, trying to entice it
into sending us something it shouldn't."""
import time
from test_framework.messages import (
msg_getaddr,
msg_ping,
msg_verack,
msg_version,
)
from test_framework.mininode import mininode_lock, P2PInterface
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
assert_greater_than_or_equal,
wait_until,
)
banscore = 10
class CLazyNode(P2PInterface):
def __init__(self):
super().__init__()
self.unexpected_msg = False
self.ever_connected = False
def bad_message(self, message):
self.unexpected_msg = True
self.log.info("should not have received message: %s" % message.command)
def on_open(self):
self.ever_connected = True
def on_version(self, message): self.bad_message(message)
def on_verack(self, message): self.bad_message(message)
def on_inv(self, message): self.bad_message(message)
def on_addr(self, message): self.bad_message(message)
def on_getdata(self, message): self.bad_message(message)
def on_getblocks(self, message): self.bad_message(message)
def on_tx(self, message): self.bad_message(message)
def on_block(self, message): self.bad_message(message)
def on_getaddr(self, message): self.bad_message(message)
def on_headers(self, message): self.bad_message(message)
def on_getheaders(self, message): self.bad_message(message)
def on_ping(self, message): self.bad_message(message)
def on_mempool(self, message): self.bad_message(message)
def on_pong(self, message): self.bad_message(message)
def on_feefilter(self, message): self.bad_message(message)
def on_sendheaders(self, message): self.bad_message(message)
def on_sendcmpct(self, message): self.bad_message(message)
def on_cmpctblock(self, message): self.bad_message(message)
def on_getblocktxn(self, message): self.bad_message(message)
def on_blocktxn(self, message): self.bad_message(message)
# Node that never sends a version. We'll use this to send a bunch of messages
# anyway, and eventually get disconnected.
class CNodeNoVersionBan(CLazyNode):
# send a bunch of veracks without sending a message. This should get us disconnected.
# NOTE: implementation-specific check here. Remove if bitcoind ban behavior changes
def on_open(self):
super().on_open()
for i in range(banscore):
self.send_message(msg_verack())
# Node that never sends a version. This one just sits idle and hopes to receive
# any message (it shouldn't!)
class CNodeNoVersionIdle(CLazyNode):
def __init__(self):
super().__init__()
# Node that sends a version but not a verack.
class CNodeNoVerackIdle(CLazyNode):
def __init__(self):
self.version_received = False
super().__init__()
def on_verack(self, message): pass
# When version is received, don't reply with a verack. Instead, see if the
# node will give us a message that it shouldn't. This is not an exhaustive
# list!
def on_version(self, message):
self.version_received = True
self.send_message(msg_ping())
self.send_message(msg_getaddr())
class P2PVersionStore(P2PInterface):
version_received = None
def on_version(self, msg):
super().on_version(msg)
self.version_received = msg
class P2PLeakTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 1
self.extra_args = [['-banscore=' + str(banscore)]]
def run_test(self):
no_version_bannode = self.nodes[0].add_p2p_connection(CNodeNoVersionBan(), send_version=False, wait_for_verack=False)
no_version_idlenode = self.nodes[0].add_p2p_connection(CNodeNoVersionIdle(), send_version=False, wait_for_verack=False)
no_verack_idlenode = self.nodes[0].add_p2p_connection(CNodeNoVerackIdle(), wait_for_verack=False)
# Wait until we got the verack in response to the version. Though, don't wait for the other node to receive the
# verack, since we never sent one
no_verack_idlenode.wait_for_verack()
wait_until(lambda: no_version_bannode.ever_connected, timeout=10, lock=mininode_lock)
wait_until(lambda: no_version_idlenode.ever_connected, timeout=10, lock=mininode_lock)
wait_until(lambda: no_verack_idlenode.version_received, timeout=10, lock=mininode_lock)
# Mine a block and make sure that it's not sent to the connected nodes
self.nodes[0].generatetoaddress(1, self.nodes[0].get_deterministic_priv_key().address)
#Give the node enough time to possibly leak out a message
time.sleep(5)
#This node should have been banned
assert not no_version_bannode.is_connected
self.nodes[0].disconnect_p2ps()
# Wait until all connections are closed
wait_until(lambda: len(self.nodes[0].getpeerinfo()) == 0)
# Make sure no unexpected messages came in
assert no_version_bannode.unexpected_msg == False
assert no_version_idlenode.unexpected_msg == False
assert no_verack_idlenode.unexpected_msg == False
self.log.info('Check that the version message does not leak the local address of the node')
time_begin = int(time.time())
p2p_version_store = self.nodes[0].add_p2p_connection(P2PVersionStore())
time_end = time.time()
ver = p2p_version_store.version_received
assert_greater_than_or_equal(ver.nTime, time_begin)
assert_greater_than_or_equal(time_end, ver.nTime)
assert_equal(ver.addrFrom.port, 0)
assert_equal(ver.addrFrom.ip, '0.0.0.0')
assert_equal(ver.nStartingHeight, 201)
assert_equal(ver.nRelay, 1)
self.log.info('Check that old nodes are disconnected')
p2p_old_node = self.nodes[0].add_p2p_connection(P2PInterface(), send_version=False, wait_for_verack=False)
old_version_msg = msg_version()
old_version_msg.nVersion = 31799
wait_until(lambda: p2p_old_node.is_connected)
with self.nodes[0].assert_debug_log(['peer=4 using obsolete version 31799; disconnecting']):
p2p_old_node.send_message(old_version_msg)
p2p_old_node.wait_for_disconnect()
if __name__ == '__main__':
P2PLeakTest().main()
|
