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-rwxr-xr-xtest/functional/maxblocksinflight.py97
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diff --git a/test/functional/maxblocksinflight.py b/test/functional/maxblocksinflight.py
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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.
+"""Test nodes responses to having many blocks in flight.
+
+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.]
+"""
+
+from test_framework.mininode import *
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import *
+
+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)
+
+ 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)
+ self.log.info("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 __init__(self):
+ super().__init__()
+ self.setup_clean_chain = True
+ self.num_nodes = 1
+
+ def setup_network(self):
+ self.nodes = start_nodes(self.num_nodes, self.options.tmpdir,
+ extra_args=[['-whitelist=127.0.0.1']],
+ binary=[self.options.testbinary])
+
+ def run_test(self):
+ test = TestManager()
+ # pass log handler through to the test manager object
+ test.log = self.log
+ 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()