forked from bitcoin/bitcoin
-
Notifications
You must be signed in to change notification settings - Fork 11
/
feature_maxuploadtarget.py
executable file
·209 lines (163 loc) · 8.98 KB
/
feature_maxuploadtarget.py
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
#!/usr/bin/env python3
# Copyright (c) 2015-2022 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 behavior of -maxuploadtarget.
* Verify that getdata requests for old blocks (>1week) are dropped
if uploadtarget has been reached.
* Verify that getdata requests for recent blocks are respected even
if uploadtarget has been reached.
* Verify that mempool requests lead to a disconnect if uploadtarget has been reached.
* Verify that the upload counters are reset after 24 hours.
"""
from collections import defaultdict
import time
from test_framework.messages import (
CInv,
MSG_BLOCK,
msg_getdata,
msg_mempool,
)
from test_framework.p2p import P2PInterface
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
mine_large_block,
)
from test_framework.wallet import MiniWallet
UPLOAD_TARGET_MB = 800
class TestP2PConn(P2PInterface):
def __init__(self):
super().__init__()
self.block_receive_map = defaultdict(int)
def on_inv(self, message):
pass
def on_block(self, message):
message.block.calc_sha256()
self.block_receive_map[message.block.sha256] += 1
class MaxUploadTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 1
self.extra_args = [[
f"-maxuploadtarget={UPLOAD_TARGET_MB}M",
"-datacarriersize=100000",
]]
self.supports_cli = False
def assert_uploadtarget_state(self, *, target_reached, serve_historical_blocks):
"""Verify the node's current upload target state via the `getnettotals` RPC call."""
uploadtarget = self.nodes[0].getnettotals()["uploadtarget"]
assert_equal(uploadtarget["target_reached"], target_reached)
assert_equal(uploadtarget["serve_historical_blocks"], serve_historical_blocks)
def run_test(self):
# Initially, neither historical blocks serving limit nor total limit are reached
self.assert_uploadtarget_state(target_reached=False, serve_historical_blocks=True)
# Before we connect anything, we first set the time on the node
# to be in the past, otherwise things break because the CNode
# time counters can't be reset backward after initialization
old_time = int(time.time() - 2*60*60*24*7)
self.nodes[0].setmocktime(old_time)
# Generate some old blocks
self.wallet = MiniWallet(self.nodes[0])
self.generate(self.wallet, 130)
# p2p_conns[0] will only request old blocks
# p2p_conns[1] will only request new blocks
# p2p_conns[2] will test resetting the counters
p2p_conns = []
for _ in range(3):
# Don't use v2transport in this test (too slow with the unoptimized python ChaCha20 implementation)
p2p_conns.append(self.nodes[0].add_p2p_connection(TestP2PConn(), supports_v2_p2p=False))
# Now mine a big block
mine_large_block(self, self.wallet, self.nodes[0])
# Store the hash; we'll request this later
big_old_block = self.nodes[0].getbestblockhash()
old_block_size = self.nodes[0].getblock(big_old_block, True)['size']
big_old_block = int(big_old_block, 16)
# Advance to two days ago
self.nodes[0].setmocktime(int(time.time()) - 2*60*60*24)
# Mine one more block, so that the prior block looks old
mine_large_block(self, self.wallet, self.nodes[0])
# We'll be requesting this new block too
big_new_block = self.nodes[0].getbestblockhash()
big_new_block = int(big_new_block, 16)
# p2p_conns[0] will test what happens if we just keep requesting the
# the same big old block too many times (expect: disconnect)
getdata_request = msg_getdata()
getdata_request.inv.append(CInv(MSG_BLOCK, big_old_block))
max_bytes_per_day = UPLOAD_TARGET_MB * 1024 *1024
daily_buffer = 144 * 4000000
max_bytes_available = max_bytes_per_day - daily_buffer
success_count = max_bytes_available // old_block_size
# 576MB will be reserved for relaying new blocks, so expect this to
# succeed for ~235 tries.
for i in range(success_count):
p2p_conns[0].send_and_ping(getdata_request)
assert_equal(p2p_conns[0].block_receive_map[big_old_block], i+1)
assert_equal(len(self.nodes[0].getpeerinfo()), 3)
# At most a couple more tries should succeed (depending on how long
# the test has been running so far).
with self.nodes[0].assert_debug_log(expected_msgs=["historical block serving limit reached, disconnect peer"]):
for _ in range(3):
p2p_conns[0].send_message(getdata_request)
p2p_conns[0].wait_for_disconnect()
assert_equal(len(self.nodes[0].getpeerinfo()), 2)
self.log.info("Peer 0 disconnected after downloading old block too many times")
# Historical blocks serving limit is reached by now, but total limit still isn't
self.assert_uploadtarget_state(target_reached=False, serve_historical_blocks=False)
# Requesting the current block on p2p_conns[1] should succeed indefinitely,
# even when over the max upload target.
# We'll try 800 times
getdata_request.inv = [CInv(MSG_BLOCK, big_new_block)]
for i in range(800):
p2p_conns[1].send_and_ping(getdata_request)
assert_equal(p2p_conns[1].block_receive_map[big_new_block], i+1)
# Both historical blocks serving limit and total limit are reached
self.assert_uploadtarget_state(target_reached=True, serve_historical_blocks=False)
self.log.info("Peer 1 able to repeatedly download new block")
# But if p2p_conns[1] tries for an old block, it gets disconnected too.
getdata_request.inv = [CInv(MSG_BLOCK, big_old_block)]
with self.nodes[0].assert_debug_log(expected_msgs=["historical block serving limit reached, disconnect peer"]):
p2p_conns[1].send_message(getdata_request)
p2p_conns[1].wait_for_disconnect()
assert_equal(len(self.nodes[0].getpeerinfo()), 1)
self.log.info("Peer 1 disconnected after trying to download old block")
self.log.info("Advancing system time on node to clear counters...")
# If we advance the time by 24 hours, then the counters should reset,
# and p2p_conns[2] should be able to retrieve the old block.
self.nodes[0].setmocktime(int(time.time()))
p2p_conns[2].sync_with_ping()
p2p_conns[2].send_and_ping(getdata_request)
assert_equal(p2p_conns[2].block_receive_map[big_old_block], 1)
self.assert_uploadtarget_state(target_reached=False, serve_historical_blocks=True)
self.log.info("Peer 2 able to download old block")
self.nodes[0].disconnect_p2ps()
self.log.info("Restarting node 0 with download permission, bloom filter support and 1MB maxuploadtarget")
self.restart_node(0, ["[email protected]", "-peerbloomfilters", "-maxuploadtarget=1"])
# Total limit isn't reached after restart, but 1 MB is too small to serve historical blocks
self.assert_uploadtarget_state(target_reached=False, serve_historical_blocks=False)
# Reconnect to self.nodes[0]
peer = self.nodes[0].add_p2p_connection(TestP2PConn(), supports_v2_p2p=False)
# Sending mempool message shouldn't disconnect peer, as total limit isn't reached yet
peer.send_and_ping(msg_mempool())
#retrieve 20 blocks which should be enough to break the 1MB limit
getdata_request.inv = [CInv(MSG_BLOCK, big_new_block)]
for i in range(20):
peer.send_and_ping(getdata_request)
assert_equal(peer.block_receive_map[big_new_block], i+1)
# Total limit is exceeded
self.assert_uploadtarget_state(target_reached=True, serve_historical_blocks=False)
getdata_request.inv = [CInv(MSG_BLOCK, big_old_block)]
peer.send_and_ping(getdata_request)
self.log.info("Peer still connected after trying to download old block (download permission)")
peer_info = self.nodes[0].getpeerinfo()
assert_equal(len(peer_info), 1) # node is still connected
assert_equal(peer_info[0]['permissions'], ['download'])
self.log.info("Peer gets disconnected for a mempool request after limit is reached")
with self.nodes[0].assert_debug_log(expected_msgs=["mempool request with bandwidth limit reached, disconnect peer"]):
peer.send_message(msg_mempool())
peer.wait_for_disconnect()
self.log.info("Test passing an unparsable value to -maxuploadtarget throws an error")
self.stop_node(0)
self.nodes[0].assert_start_raises_init_error(extra_args=["-maxuploadtarget=abc"], expected_msg="Error: Unable to parse -maxuploadtarget: 'abc'")
if __name__ == '__main__':
MaxUploadTest(__file__).main()