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b7ff6a611a
This test (which would fail without the previous commit) checks that after the stalling block was received, we don't incorrectly mark another peer as a staller immediately.
162 lines
6.3 KiB
Python
Executable file
162 lines
6.3 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright (c) 2022- 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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"""
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Test stalling logic during IBD
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"""
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import time
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from test_framework.blocktools import (
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create_block,
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create_coinbase
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)
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from test_framework.messages import (
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MSG_BLOCK,
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MSG_TYPE_MASK,
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)
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from test_framework.p2p import (
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CBlockHeader,
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msg_block,
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msg_headers,
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P2PDataStore,
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)
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import (
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assert_equal,
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)
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class P2PStaller(P2PDataStore):
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def __init__(self, stall_blocks):
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self.stall_blocks = stall_blocks
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super().__init__()
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def on_getdata(self, message):
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for inv in message.inv:
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self.getdata_requests.append(inv.hash)
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if (inv.type & MSG_TYPE_MASK) == MSG_BLOCK:
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if (inv.hash not in self.stall_blocks):
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self.send_without_ping(msg_block(self.block_store[inv.hash]))
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def on_getheaders(self, message):
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pass
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class P2PIBDStallingTest(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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def run_test(self):
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NUM_BLOCKS = 1025
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NUM_PEERS = 5
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node = self.nodes[0]
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tip = int(node.getbestblockhash(), 16)
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blocks = []
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height = 1
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block_time = node.getblock(node.getbestblockhash())['time'] + 1
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self.log.info("Prepare blocks without sending them to the node")
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block_dict = {}
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for _ in range(NUM_BLOCKS):
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blocks.append(create_block(tip, create_coinbase(height), block_time))
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blocks[-1].solve()
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tip = blocks[-1].sha256
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block_time += 1
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height += 1
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block_dict[blocks[-1].sha256] = blocks[-1]
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stall_index = 0
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second_stall_index = 500
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stall_blocks = [blocks[stall_index].sha256, blocks[second_stall_index].sha256]
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headers_message = msg_headers()
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headers_message.headers = [CBlockHeader(b) for b in blocks[:NUM_BLOCKS-1]]
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peers = []
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self.log.info("Check that a staller does not get disconnected if the 1024 block lookahead buffer is filled")
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self.mocktime = int(time.time()) + 1
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node.setmocktime(self.mocktime)
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for id in range(NUM_PEERS):
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peers.append(node.add_outbound_p2p_connection(P2PStaller(stall_blocks), p2p_idx=id, connection_type="outbound-full-relay"))
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peers[-1].block_store = block_dict
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peers[-1].send_and_ping(headers_message)
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# Wait until all blocks are received (except for the stall blocks), so that no other blocks are in flight.
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self.wait_until(lambda: sum(len(peer['inflight']) for peer in node.getpeerinfo()) == len(stall_blocks))
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self.all_sync_send_with_ping(peers)
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# If there was a peer marked for stalling, it would get disconnected
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self.mocktime += 3
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node.setmocktime(self.mocktime)
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self.all_sync_send_with_ping(peers)
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assert_equal(node.num_test_p2p_connections(), NUM_PEERS)
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self.log.info("Check that increasing the window beyond 1024 blocks triggers stalling logic")
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headers_message.headers = [CBlockHeader(b) for b in blocks]
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with node.assert_debug_log(expected_msgs=['Stall started']):
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for p in peers:
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p.send_without_ping(headers_message)
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self.all_sync_send_with_ping(peers)
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self.log.info("Check that the stalling peer is disconnected after 2 seconds")
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self.mocktime += 3
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node.setmocktime(self.mocktime)
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peers[0].wait_for_disconnect()
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assert_equal(node.num_test_p2p_connections(), NUM_PEERS - 1)
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self.wait_until(lambda: self.is_block_requested(peers, stall_blocks[0]))
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# Make sure that SendMessages() is invoked, which assigns the missing block
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# to another peer and starts the stalling logic for them
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self.all_sync_send_with_ping(peers)
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self.log.info("Check that the stalling timeout gets doubled to 4 seconds for the next staller")
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# No disconnect after just 3 seconds
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self.mocktime += 3
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node.setmocktime(self.mocktime)
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self.all_sync_send_with_ping(peers)
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assert_equal(node.num_test_p2p_connections(), NUM_PEERS - 1)
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self.mocktime += 2
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node.setmocktime(self.mocktime)
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self.wait_until(lambda: sum(x.is_connected for x in node.p2ps) == NUM_PEERS - 2)
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self.wait_until(lambda: self.is_block_requested(peers, stall_blocks[0]))
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self.all_sync_send_with_ping(peers)
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self.log.info("Check that the stalling timeout gets doubled to 8 seconds for the next staller")
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# No disconnect after just 7 seconds
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self.mocktime += 7
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node.setmocktime(self.mocktime)
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self.all_sync_send_with_ping(peers)
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assert_equal(node.num_test_p2p_connections(), NUM_PEERS - 2)
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self.mocktime += 2
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node.setmocktime(self.mocktime)
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self.wait_until(lambda: sum(x.is_connected for x in node.p2ps) == NUM_PEERS - 3)
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self.wait_until(lambda: self.is_block_requested(peers, stall_blocks[0]))
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self.all_sync_send_with_ping(peers)
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self.log.info("Provide the first withheld block and check that stalling timeout gets reduced back to 2 seconds")
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with node.assert_debug_log(expected_msgs=['Decreased stalling timeout to 2 seconds'], unexpected_msgs=['Stall started']):
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for p in peers:
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if p.is_connected and (stall_blocks[0] in p.getdata_requests):
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p.send_without_ping(msg_block(block_dict[stall_blocks[0]]))
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self.all_sync_send_with_ping(peers)
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self.log.info("Check that all outstanding blocks up to the second stall block get connected")
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self.wait_until(lambda: node.getblockcount() == second_stall_index)
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def all_sync_send_with_ping(self, peers):
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for p in peers:
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if p.is_connected:
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p.sync_with_ping()
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def is_block_requested(self, peers, hash):
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for p in peers:
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if p.is_connected and (hash in p.getdata_requests):
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return True
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return False
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if __name__ == '__main__':
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P2PIBDStallingTest(__file__).main()
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