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#!/usr/bin/env python3
# Copyright (c) 2015-2016 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
from test_framework.mininode import *
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import *
import logging
'''
In this test we connect to one node over p2p, send it numerous inv's, and
compare the resulting number of getdata requests to a max allowed value. We
test for exceeding 128 blocks in flight, which was the limit an 0.9 client will
reach. [0.10 clients shouldn't request more than 16 from a single peer.]
'''
MAX_REQUESTS = 128
class TestManager(NodeConnCB):
# set up NodeConnCB callbacks, overriding base class
def on_getdata(self, conn, message):
self.log.debug("got getdata %s" % repr(message))
# Log the requests
for inv in message.inv:
if inv.hash not in self.blockReqCounts:
self.blockReqCounts[inv.hash] = 0
self.blockReqCounts[inv.hash] += 1
def on_close(self, conn):
if not self.disconnectOkay:
raise EarlyDisconnectError(0)
def __init__(self):
NodeConnCB.__init__(self)
self.log = logging.getLogger("BlockRelayTest")
def add_new_connection(self, connection):
self.connection = connection
self.blockReqCounts = {}
self.disconnectOkay = False
def run(self):
self.connection.rpc.generate(1) # Leave IBD
numBlocksToGenerate = [8, 16, 128, 1024]
for count in range(len(numBlocksToGenerate)):
current_invs = []
for i in range(numBlocksToGenerate[count]):
current_invs.append(CInv(2, random.randrange(0, 1 << 256)))
if len(current_invs) >= 50000:
self.connection.send_message(msg_inv(current_invs))
current_invs = []
if len(current_invs) > 0:
self.connection.send_message(msg_inv(current_invs))
# Wait and see how many blocks were requested
time.sleep(2)
total_requests = 0
with mininode_lock:
for key in self.blockReqCounts:
total_requests += self.blockReqCounts[key]
if self.blockReqCounts[key] > 1:
raise AssertionError("Error, test failed: block %064x requested more than once" % key)
if total_requests > MAX_REQUESTS:
raise AssertionError("Error, too many blocks (%d) requested" % total_requests)
print("Round %d: success (total requests: %d)" % (count, total_requests))
self.disconnectOkay = True
self.connection.disconnect_node()
class MaxBlocksInFlightTest(BitcoinTestFramework):
def add_options(self, parser):
parser.add_option("--testbinary", dest="testbinary",
default=os.getenv("BITCOIND", "bitcoind"),
help="Binary to test max block requests behavior")
def setup_chain(self):
print("Initializing test directory "+self.options.tmpdir)
initialize_chain_clean(self.options.tmpdir, 1)
def setup_network(self):
self.nodes = start_nodes(1, self.options.tmpdir,
extra_args=[['-debug', '-whitelist=127.0.0.1']],
binary=[self.options.testbinary])
def run_test(self):
test = TestManager()
test.add_new_connection(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], test))
NetworkThread().start() # Start up network handling in another thread
test.run()
if __name__ == '__main__':
MaxBlocksInFlightTest().main()
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