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
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
|
#!/usr/bin/env python3
# Copyright (c) 2020 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 addr relay
"""
from test_framework.messages import (
CAddress,
NODE_NETWORK,
NODE_WITNESS,
msg_addr,
msg_getaddr
)
from test_framework.p2p import P2PInterface
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
assert_greater_than_or_equal,
)
import os
import random
import time
class AddrReceiver(P2PInterface):
num_ipv4_received = 0
test_addr_contents = False
def __init__(self, test_addr_contents=False):
super().__init__()
self.test_addr_contents = test_addr_contents
def on_addr(self, message):
for addr in message.addrs:
self.num_ipv4_received += 1
if(self.test_addr_contents):
# relay_tests checks the content of the addr messages match
# expectations based on the message creation in setup_addr_msg
assert_equal(addr.nServices, 9)
if not 8333 <= addr.port < 8343:
raise AssertionError("Invalid addr.port of {} (8333-8342 expected)".format(addr.port))
assert addr.ip.startswith('123.123.123.')
def addr_received(self):
return self.num_ipv4_received != 0
def getaddr_received(self):
return self.message_count['getaddr'] > 0
class AddrTest(BitcoinTestFramework):
counter = 0
mocktime = int(time.time())
def set_test_params(self):
self.num_nodes = 1
self.extra_args = [["-whitelist=addr@127.0.0.1"]]
def run_test(self):
self.oversized_addr_test()
self.relay_tests()
self.getaddr_tests()
self.blocksonly_mode_tests()
self.rate_limit_tests()
def setup_addr_msg(self, num):
addrs = []
for i in range(num):
addr = CAddress()
addr.time = self.mocktime + i
addr.nServices = NODE_NETWORK | NODE_WITNESS
addr.ip = f"123.123.123.{self.counter % 256}"
addr.port = 8333 + i
addrs.append(addr)
self.counter += 1
msg = msg_addr()
msg.addrs = addrs
return msg
def setup_rand_addr_msg(self, num):
addrs = []
for i in range(num):
addr = CAddress()
addr.time = self.mocktime + i
addr.nServices = NODE_NETWORK | NODE_WITNESS
addr.ip = f"{random.randrange(128,169)}.{random.randrange(1,255)}.{random.randrange(1,255)}.{random.randrange(1,255)}"
addr.port = 8333
addrs.append(addr)
msg = msg_addr()
msg.addrs = addrs
return msg
def send_addr_msg(self, source, msg, receivers):
source.send_and_ping(msg)
# pop m_next_addr_send timer
self.mocktime += 10 * 60
self.nodes[0].setmocktime(self.mocktime)
for peer in receivers:
peer.sync_send_with_ping()
def oversized_addr_test(self):
self.log.info('Send an addr message that is too large')
addr_source = self.nodes[0].add_p2p_connection(P2PInterface())
msg = self.setup_addr_msg(1010)
with self.nodes[0].assert_debug_log(['addr message size = 1010']):
addr_source.send_and_ping(msg)
self.nodes[0].disconnect_p2ps()
def relay_tests(self):
self.log.info('Test address relay')
self.log.info('Check that addr message content is relayed and added to addrman')
addr_source = self.nodes[0].add_p2p_connection(P2PInterface())
num_receivers = 7
receivers = []
for _ in range(num_receivers):
receivers.append(self.nodes[0].add_p2p_connection(AddrReceiver(test_addr_contents=True)))
# Keep this with length <= 10. Addresses from larger messages are not
# relayed.
num_ipv4_addrs = 10
msg = self.setup_addr_msg(num_ipv4_addrs)
with self.nodes[0].assert_debug_log(
[
'Added {} addresses from 127.0.0.1: 0 tried'.format(num_ipv4_addrs),
'received: addr (301 bytes) peer=1',
]
):
self.send_addr_msg(addr_source, msg, receivers)
total_ipv4_received = sum(r.num_ipv4_received for r in receivers)
# Every IPv4 address must be relayed to two peers, other than the
# originating node (addr_source).
ipv4_branching_factor = 2
assert_equal(total_ipv4_received, num_ipv4_addrs * ipv4_branching_factor)
self.nodes[0].disconnect_p2ps()
self.log.info('Check relay of addresses received from outbound peers')
inbound_peer = self.nodes[0].add_p2p_connection(AddrReceiver(test_addr_contents=True))
full_outbound_peer = self.nodes[0].add_outbound_p2p_connection(AddrReceiver(), p2p_idx=0, connection_type="outbound-full-relay")
msg = self.setup_addr_msg(2)
self.send_addr_msg(full_outbound_peer, msg, [inbound_peer])
self.log.info('Check that the first addr message received from an outbound peer is not relayed')
# Currently, there is a flag that prevents the first addr message received
# from a new outbound peer to be relayed to others. Originally meant to prevent
# large GETADDR responses from being relayed, it now typically affects the self-announcement
# of the outbound peer which is often sent before the GETADDR response.
assert_equal(inbound_peer.num_ipv4_received, 0)
self.log.info('Check that subsequent addr messages sent from an outbound peer are relayed')
msg2 = self.setup_addr_msg(2)
self.send_addr_msg(full_outbound_peer, msg2, [inbound_peer])
assert_equal(inbound_peer.num_ipv4_received, 2)
self.log.info('Check address relay to outbound peers')
block_relay_peer = self.nodes[0].add_outbound_p2p_connection(AddrReceiver(), p2p_idx=1, connection_type="block-relay-only")
msg3 = self.setup_addr_msg(2)
self.send_addr_msg(inbound_peer, msg3, [full_outbound_peer, block_relay_peer])
self.log.info('Check that addresses are relayed to full outbound peers')
assert_equal(full_outbound_peer.num_ipv4_received, 2)
self.log.info('Check that addresses are not relayed to block-relay-only outbound peers')
assert_equal(block_relay_peer.num_ipv4_received, 0)
self.nodes[0].disconnect_p2ps()
def getaddr_tests(self):
self.log.info('Test getaddr behavior')
self.log.info('Check that we send a getaddr message upon connecting to an outbound-full-relay peer')
full_outbound_peer = self.nodes[0].add_outbound_p2p_connection(AddrReceiver(), p2p_idx=0, connection_type="outbound-full-relay")
full_outbound_peer.sync_with_ping()
assert full_outbound_peer.getaddr_received()
self.log.info('Check that we do not send a getaddr message upon connecting to a block-relay-only peer')
block_relay_peer = self.nodes[0].add_outbound_p2p_connection(AddrReceiver(), p2p_idx=1, connection_type="block-relay-only")
block_relay_peer.sync_with_ping()
assert_equal(block_relay_peer.getaddr_received(), False)
self.log.info('Check that we answer getaddr messages only from inbound peers')
inbound_peer = self.nodes[0].add_p2p_connection(AddrReceiver())
inbound_peer.sync_with_ping()
# Add some addresses to addrman
for i in range(1000):
first_octet = i >> 8
second_octet = i % 256
a = f"{first_octet}.{second_octet}.1.1"
self.nodes[0].addpeeraddress(a, 8333)
full_outbound_peer.send_and_ping(msg_getaddr())
block_relay_peer.send_and_ping(msg_getaddr())
inbound_peer.send_and_ping(msg_getaddr())
self.mocktime += 5 * 60
self.nodes[0].setmocktime(self.mocktime)
inbound_peer.wait_until(lambda: inbound_peer.addr_received() is True)
assert_equal(full_outbound_peer.num_ipv4_received, 0)
assert_equal(block_relay_peer.num_ipv4_received, 0)
assert inbound_peer.num_ipv4_received > 100
self.nodes[0].disconnect_p2ps()
def blocksonly_mode_tests(self):
self.log.info('Test addr relay in -blocksonly mode')
self.restart_node(0, ["-blocksonly", "-whitelist=addr@127.0.0.1"])
self.mocktime = int(time.time())
self.log.info('Check that we send getaddr messages')
full_outbound_peer = self.nodes[0].add_outbound_p2p_connection(AddrReceiver(), p2p_idx=0, connection_type="outbound-full-relay")
full_outbound_peer.sync_with_ping()
assert full_outbound_peer.getaddr_received()
self.log.info('Check that we relay address messages')
addr_source = self.nodes[0].add_p2p_connection(P2PInterface())
msg = self.setup_addr_msg(2)
self.send_addr_msg(addr_source, msg, [full_outbound_peer])
assert_equal(full_outbound_peer.num_ipv4_received, 2)
self.nodes[0].disconnect_p2ps()
def rate_limit_tests(self):
for contype, tokens, no_relay in [("outbound-full-relay", 1001, False), ("block-relay-only", 0, True), ("inbound", 1, False)]:
self.log.info(f'Test rate limiting of addr processing for {contype} peers')
self.stop_node(0)
os.remove(os.path.join(self.nodes[0].datadir, "regtest", "peers.dat"))
self.start_node(0, [])
self.mocktime = int(time.time())
self.nodes[0].setmocktime(self.mocktime)
if contype == "inbound":
peer = self.nodes[0].add_p2p_connection(AddrReceiver())
else:
peer = self.nodes[0].add_outbound_p2p_connection(AddrReceiver(), p2p_idx=0, connection_type=contype)
# Check that we start off with empty addrman
addr_count_0 = len(self.nodes[0].getnodeaddresses(0))
assert_equal(addr_count_0, 0)
# Send 600 addresses. For all but the block-relay-only peer this should result in at least 1 address.
peer.send_and_ping(self.setup_rand_addr_msg(600))
addr_count_1 = len(self.nodes[0].getnodeaddresses(0))
assert_greater_than_or_equal(tokens, addr_count_1)
assert_greater_than_or_equal(addr_count_0 + 600, addr_count_1)
assert_equal(addr_count_1 > addr_count_0, tokens > 0)
# Send 600 more addresses. For the outbound-full-relay peer (which we send a GETADDR, and thus will
# process up to 1001 incoming addresses), this means more entries will appear.
peer.send_and_ping(self.setup_rand_addr_msg(600))
addr_count_2 = len(self.nodes[0].getnodeaddresses(0))
assert_greater_than_or_equal(tokens, addr_count_2)
assert_greater_than_or_equal(addr_count_1 + 600, addr_count_2)
assert_equal(addr_count_2 > addr_count_1, tokens > 600)
# Send 10 more. As we reached the processing limit for all nodes, this should have no effect.
peer.send_and_ping(self.setup_rand_addr_msg(10))
addr_count_3 = len(self.nodes[0].getnodeaddresses(0))
assert_greater_than_or_equal(tokens, addr_count_3)
assert_equal(addr_count_2, addr_count_3)
# Advance the time by 100 seconds, permitting the processing of 10 more addresses. Send 200,
# but verify that no more than 10 are processed.
self.mocktime += 100
self.nodes[0].setmocktime(self.mocktime)
new_tokens = 0 if no_relay else 10
tokens += new_tokens
peer.send_and_ping(self.setup_rand_addr_msg(200))
addr_count_4 = len(self.nodes[0].getnodeaddresses(0))
assert_greater_than_or_equal(tokens, addr_count_4)
assert_greater_than_or_equal(addr_count_3 + new_tokens, addr_count_4)
# Advance the time by 1000 seconds, permitting the processing of 100 more addresses. Send 200,
# but verify that no more than 100 are processed (and at least some).
self.mocktime += 1000
self.nodes[0].setmocktime(self.mocktime)
new_tokens = 0 if no_relay else 100
tokens += new_tokens
peer.send_and_ping(self.setup_rand_addr_msg(200))
addr_count_5 = len(self.nodes[0].getnodeaddresses(0))
assert_greater_than_or_equal(tokens, addr_count_5)
assert_greater_than_or_equal(addr_count_4 + new_tokens, addr_count_5)
assert_equal(addr_count_5 > addr_count_4, not no_relay)
self.nodes[0].disconnect_p2ps()
if __name__ == '__main__':
AddrTest().main()
|
