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-rwxr-xr-xtest/functional/maxuploadtarget.py233
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diff --git a/test/functional/maxuploadtarget.py b/test/functional/maxuploadtarget.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 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 respecteved even
+if uploadtarget has been reached.
+* Verify that the upload counters are reset after 24 hours.
+"""
+
+from test_framework.mininode import *
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import *
+import time
+
+# TestNode: bare-bones "peer". Used mostly as a conduit for a test to sending
+# p2p messages to a node, generating the messages in the main testing logic.
+class TestNode(NodeConnCB):
+ def __init__(self):
+ NodeConnCB.__init__(self)
+ self.connection = None
+ self.ping_counter = 1
+ self.last_pong = msg_pong()
+ self.block_receive_map = {}
+
+ def add_connection(self, conn):
+ self.connection = conn
+ self.peer_disconnected = False
+
+ def on_inv(self, conn, message):
+ pass
+
+ # Track the last getdata message we receive (used in the test)
+ def on_getdata(self, conn, message):
+ self.last_getdata = message
+
+ def on_block(self, conn, message):
+ message.block.calc_sha256()
+ try:
+ self.block_receive_map[message.block.sha256] += 1
+ except KeyError as e:
+ self.block_receive_map[message.block.sha256] = 1
+
+ # Spin until verack message is received from the node.
+ # We use this to signal that our test can begin. This
+ # is called from the testing thread, so it needs to acquire
+ # the global lock.
+ def wait_for_verack(self):
+ def veracked():
+ return self.verack_received
+ return wait_until(veracked, timeout=10)
+
+ def wait_for_disconnect(self):
+ def disconnected():
+ return self.peer_disconnected
+ return wait_until(disconnected, timeout=10)
+
+ # Wrapper for the NodeConn's send_message function
+ def send_message(self, message):
+ self.connection.send_message(message)
+
+ def on_pong(self, conn, message):
+ self.last_pong = message
+
+ def on_close(self, conn):
+ self.peer_disconnected = True
+
+ # Sync up with the node after delivery of a block
+ def sync_with_ping(self, timeout=30):
+ def received_pong():
+ return (self.last_pong.nonce == self.ping_counter)
+ self.connection.send_message(msg_ping(nonce=self.ping_counter))
+ success = wait_until(received_pong, timeout=timeout)
+ self.ping_counter += 1
+ return success
+
+class MaxUploadTest(BitcoinTestFramework):
+
+ def __init__(self):
+ super().__init__()
+ self.setup_clean_chain = True
+ self.num_nodes = 1
+
+ # Cache for utxos, as the listunspent may take a long time later in the test
+ self.utxo_cache = []
+
+ def setup_network(self):
+ # Start a node with maxuploadtarget of 200 MB (/24h)
+ self.nodes = []
+ self.nodes.append(start_node(0, self.options.tmpdir, ["-maxuploadtarget=800", "-blockmaxsize=999000"]))
+
+ def run_test(self):
+ # 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.nodes[0].generate(130)
+
+ # test_nodes[0] will only request old blocks
+ # test_nodes[1] will only request new blocks
+ # test_nodes[2] will test resetting the counters
+ test_nodes = []
+ connections = []
+
+ for i in range(3):
+ test_nodes.append(TestNode())
+ connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], test_nodes[i]))
+ test_nodes[i].add_connection(connections[i])
+
+ NetworkThread().start() # Start up network handling in another thread
+ [x.wait_for_verack() for x in test_nodes]
+
+ # Test logic begins here
+
+ # Now mine a big block
+ mine_large_block(self.nodes[0], self.utxo_cache)
+
+ # 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.nodes[0], self.utxo_cache)
+
+ # We'll be requesting this new block too
+ big_new_block = self.nodes[0].getbestblockhash()
+ big_new_block = int(big_new_block, 16)
+
+ # test_nodes[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(2, big_old_block))
+
+ max_bytes_per_day = 800*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):
+ test_nodes[0].send_message(getdata_request)
+ test_nodes[0].sync_with_ping()
+ assert_equal(test_nodes[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).
+ for i in range(3):
+ test_nodes[0].send_message(getdata_request)
+ test_nodes[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")
+
+ # Requesting the current block on test_nodes[1] should succeed indefinitely,
+ # even when over the max upload target.
+ # We'll try 800 times
+ getdata_request.inv = [CInv(2, big_new_block)]
+ for i in range(800):
+ test_nodes[1].send_message(getdata_request)
+ test_nodes[1].sync_with_ping()
+ assert_equal(test_nodes[1].block_receive_map[big_new_block], i+1)
+
+ self.log.info("Peer 1 able to repeatedly download new block")
+
+ # But if test_nodes[1] tries for an old block, it gets disconnected too.
+ getdata_request.inv = [CInv(2, big_old_block)]
+ test_nodes[1].send_message(getdata_request)
+ test_nodes[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 test_nodes[2] should be able to retrieve the old block.
+ self.nodes[0].setmocktime(int(time.time()))
+ test_nodes[2].sync_with_ping()
+ test_nodes[2].send_message(getdata_request)
+ test_nodes[2].sync_with_ping()
+ assert_equal(test_nodes[2].block_receive_map[big_old_block], 1)
+
+ self.log.info("Peer 2 able to download old block")
+
+ [c.disconnect_node() for c in connections]
+
+ #stop and start node 0 with 1MB maxuploadtarget, whitelist 127.0.0.1
+ self.log.info("Restarting nodes with -whitelist=127.0.0.1")
+ stop_node(self.nodes[0], 0)
+ self.nodes[0] = start_node(0, self.options.tmpdir, ["-whitelist=127.0.0.1", "-maxuploadtarget=1", "-blockmaxsize=999000"])
+
+ #recreate/reconnect 3 test nodes
+ test_nodes = []
+ connections = []
+
+ for i in range(3):
+ test_nodes.append(TestNode())
+ connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], test_nodes[i]))
+ test_nodes[i].add_connection(connections[i])
+
+ NetworkThread().start() # Start up network handling in another thread
+ [x.wait_for_verack() for x in test_nodes]
+
+ #retrieve 20 blocks which should be enough to break the 1MB limit
+ getdata_request.inv = [CInv(2, big_new_block)]
+ for i in range(20):
+ test_nodes[1].send_message(getdata_request)
+ test_nodes[1].sync_with_ping()
+ assert_equal(test_nodes[1].block_receive_map[big_new_block], i+1)
+
+ getdata_request.inv = [CInv(2, big_old_block)]
+ test_nodes[1].send_message(getdata_request)
+ test_nodes[1].wait_for_disconnect()
+ assert_equal(len(self.nodes[0].getpeerinfo()), 3) #node is still connected because of the whitelist
+
+ self.log.info("Peer 1 still connected after trying to download old block (whitelisted)")
+
+ [c.disconnect_node() for c in connections]
+
+if __name__ == '__main__':
+ MaxUploadTest().main()