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169 lines
6.6 KiB
169 lines
6.6 KiB
#!/usr/bin/env python3 |
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# Copyright (c) 2015-2016 The Bitcoin Core developers |
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# Distributed under the MIT software license, see the accompanying |
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# file COPYING or http://www.opensource.org/licenses/mit-license.php. |
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"""Test behavior of -maxuploadtarget. |
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* Verify that getdata requests for old blocks (>1week) are dropped |
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if uploadtarget has been reached. |
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* Verify that getdata requests for recent blocks are respecteved even |
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if uploadtarget has been reached. |
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* Verify that the upload counters are reset after 24 hours. |
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""" |
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from collections import defaultdict |
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import time |
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from test_framework.mininode import * |
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from test_framework.test_framework import BitcoinTestFramework |
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from test_framework.util import * |
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class TestNode(NodeConnCB): |
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def __init__(self): |
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super().__init__() |
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self.block_receive_map = defaultdict(int) |
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def on_inv(self, conn, message): |
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pass |
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def on_block(self, conn, message): |
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message.block.calc_sha256() |
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self.block_receive_map[message.block.sha256] += 1 |
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class MaxUploadTest(BitcoinTestFramework): |
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def set_test_params(self): |
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self.setup_clean_chain = True |
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self.num_nodes = 1 |
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self.extra_args = [["-maxuploadtarget=800", "-blockmaxsize=999000"]] |
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# Cache for utxos, as the listunspent may take a long time later in the test |
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self.utxo_cache = [] |
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def run_test(self): |
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# Before we connect anything, we first set the time on the node |
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# to be in the past, otherwise things break because the CNode |
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# time counters can't be reset backward after initialization |
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old_time = int(time.time() - 2*60*60*24*7) |
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self.nodes[0].setmocktime(old_time) |
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# Generate some old blocks |
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self.nodes[0].generate(130) |
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# p2p_conns[0] will only request old blocks |
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# p2p_conns[1] will only request new blocks |
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# p2p_conns[2] will test resetting the counters |
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p2p_conns = [] |
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for _ in range(3): |
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p2p_conns.append(self.nodes[0].add_p2p_connection(TestNode())) |
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NetworkThread().start() # Start up network handling in another thread |
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for p2pc in p2p_conns: |
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p2pc.wait_for_verack() |
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# Test logic begins here |
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# Now mine a big block |
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mine_large_block(self.nodes[0], self.utxo_cache) |
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# Store the hash; we'll request this later |
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big_old_block = self.nodes[0].getbestblockhash() |
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old_block_size = self.nodes[0].getblock(big_old_block, True)['size'] |
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big_old_block = int(big_old_block, 16) |
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# Advance to two days ago |
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self.nodes[0].setmocktime(int(time.time()) - 2*60*60*24) |
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# Mine one more block, so that the prior block looks old |
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mine_large_block(self.nodes[0], self.utxo_cache) |
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# We'll be requesting this new block too |
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big_new_block = self.nodes[0].getbestblockhash() |
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big_new_block = int(big_new_block, 16) |
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# p2p_conns[0] will test what happens if we just keep requesting the |
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# the same big old block too many times (expect: disconnect) |
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getdata_request = msg_getdata() |
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getdata_request.inv.append(CInv(2, big_old_block)) |
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max_bytes_per_day = 800*1024*1024 |
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daily_buffer = 144 * 4000000 |
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max_bytes_available = max_bytes_per_day - daily_buffer |
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success_count = max_bytes_available // old_block_size |
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# 576MB will be reserved for relaying new blocks, so expect this to |
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# succeed for ~235 tries. |
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for i in range(success_count): |
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p2p_conns[0].send_message(getdata_request) |
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p2p_conns[0].sync_with_ping() |
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assert_equal(p2p_conns[0].block_receive_map[big_old_block], i+1) |
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assert_equal(len(self.nodes[0].getpeerinfo()), 3) |
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# At most a couple more tries should succeed (depending on how long |
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# the test has been running so far). |
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for i in range(3): |
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p2p_conns[0].send_message(getdata_request) |
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p2p_conns[0].wait_for_disconnect() |
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assert_equal(len(self.nodes[0].getpeerinfo()), 2) |
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self.log.info("Peer 0 disconnected after downloading old block too many times") |
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# Requesting the current block on p2p_conns[1] should succeed indefinitely, |
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# even when over the max upload target. |
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# We'll try 800 times |
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getdata_request.inv = [CInv(2, big_new_block)] |
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for i in range(800): |
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p2p_conns[1].send_message(getdata_request) |
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p2p_conns[1].sync_with_ping() |
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assert_equal(p2p_conns[1].block_receive_map[big_new_block], i+1) |
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self.log.info("Peer 1 able to repeatedly download new block") |
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# But if p2p_conns[1] tries for an old block, it gets disconnected too. |
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getdata_request.inv = [CInv(2, big_old_block)] |
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p2p_conns[1].send_message(getdata_request) |
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p2p_conns[1].wait_for_disconnect() |
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assert_equal(len(self.nodes[0].getpeerinfo()), 1) |
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self.log.info("Peer 1 disconnected after trying to download old block") |
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self.log.info("Advancing system time on node to clear counters...") |
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# If we advance the time by 24 hours, then the counters should reset, |
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# and p2p_conns[2] should be able to retrieve the old block. |
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self.nodes[0].setmocktime(int(time.time())) |
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p2p_conns[2].sync_with_ping() |
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p2p_conns[2].send_message(getdata_request) |
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p2p_conns[2].sync_with_ping() |
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assert_equal(p2p_conns[2].block_receive_map[big_old_block], 1) |
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self.log.info("Peer 2 able to download old block") |
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self.nodes[0].disconnect_p2ps() |
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#stop and start node 0 with 1MB maxuploadtarget, whitelist 127.0.0.1 |
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self.log.info("Restarting nodes with -whitelist=127.0.0.1") |
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self.stop_node(0) |
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self.start_node(0, ["-whitelist=127.0.0.1", "-maxuploadtarget=1", "-blockmaxsize=999000"]) |
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# Reconnect to self.nodes[0] |
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self.nodes[0].add_p2p_connection(TestNode()) |
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NetworkThread().start() # Start up network handling in another thread |
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self.nodes[0].p2p.wait_for_verack() |
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#retrieve 20 blocks which should be enough to break the 1MB limit |
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getdata_request.inv = [CInv(2, big_new_block)] |
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for i in range(20): |
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self.nodes[0].p2p.send_message(getdata_request) |
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self.nodes[0].p2p.sync_with_ping() |
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assert_equal(self.nodes[0].p2p.block_receive_map[big_new_block], i+1) |
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getdata_request.inv = [CInv(2, big_old_block)] |
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self.nodes[0].p2p.send_and_ping(getdata_request) |
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assert_equal(len(self.nodes[0].getpeerinfo()), 1) #node is still connected because of the whitelist |
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self.log.info("Peer still connected after trying to download old block (whitelisted)") |
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if __name__ == '__main__': |
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MaxUploadTest().main()
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