1 files changed, 99 insertions, 0 deletions
diff --git a/qa/rpc-tests/maxblocksinflight.py b/qa/rpc-tests/maxblocksinflight.py
new file mode 100755
index 0000000000..4bfe203990
--- /dev/null
+++ b/qa/rpc-tests/maxblocksinflight.py
@@ -0,0 +1,99 @@
+#!/usr/bin/env python2
+#
+# Distributed under the MIT/X11 software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+#
+
+from mininode import *
+from test_framework import BitcoinTestFramework
+from 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")
+        self.create_callback_map()
+
+    def add_new_connection(self, connection):
+        self.connection = connection
+        self.blockReqCounts = {}
+        self.disconnectOkay = False
+
+    def run(self):
+        try:
+            fail = False
+            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
+                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)
+        except AssertionError as e:
+            print "TEST FAILED: ", e.args
+
+        self.disconnectOkay = True
+        self.connection.disconnect_node()
+
+        
+class MaxBlocksInFlightTest(BitcoinTestFramework):
+    def add_options(self, parser):
+        parser.add_option("--testbinary", dest="testbinary", default="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()