diff options
Diffstat (limited to 'test/functional')
| -rwxr-xr-x | test/functional/p2p_eviction.py | 129 | ||||
| -rwxr-xr-x | test/functional/test_runner.py | 1 |
2 files changed, 130 insertions, 0 deletions
diff --git a/test/functional/p2p_eviction.py b/test/functional/p2p_eviction.py new file mode 100755 index 0000000000..b2b3a89aab --- /dev/null +++ b/test/functional/p2p_eviction.py @@ -0,0 +1,129 @@ +#!/usr/bin/env python3 +# Copyright (c) 2019 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 node eviction logic + +When the number of peers has reached the limit of maximum connections, +the next connecting inbound peer will trigger the eviction mechanism. +We cannot currently test the parts of the eviction logic that are based on +address/netgroup since in the current framework, all peers are connecting from +the same local address. See Issue #14210 for more info. +Therefore, this test is limited to the remaining protection criteria. +""" + +import time + +from test_framework.test_framework import BitcoinTestFramework +from test_framework.mininode import P2PInterface, P2PDataStore +from test_framework.util import assert_equal, wait_until +from test_framework.blocktools import create_block, create_coinbase +from test_framework.messages import CTransaction, FromHex, msg_pong, msg_tx + + +class SlowP2PDataStore(P2PDataStore): + def on_ping(self, message): + time.sleep(0.1) + self.send_message(msg_pong(message.nonce)) + +class SlowP2PInterface(P2PInterface): + def on_ping(self, message): + time.sleep(0.1) + self.send_message(msg_pong(message.nonce)) + +class P2PEvict(BitcoinTestFramework): + def set_test_params(self): + self.setup_clean_chain = True + self.num_nodes = 1 + # The choice of maxconnections=32 results in a maximum of 21 inbound connections + # (32 - 10 outbound - 1 feeler). 20 inbound peers are protected from eviction: + # 4 by netgroup, 4 that sent us blocks, 4 that sent us transactions and 8 via lowest ping time + self.extra_args = [['-maxconnections=32']] + + def run_test(self): + protected_peers = set() # peers that we expect to be protected from eviction + current_peer = -1 + node = self.nodes[0] + node.generatetoaddress(101, node.get_deterministic_priv_key().address) + + self.log.info("Create 4 peers and protect them from eviction by sending us a block") + for _ in range(4): + block_peer = node.add_p2p_connection(SlowP2PDataStore()) + current_peer += 1 + block_peer.sync_with_ping() + best_block = node.getbestblockhash() + tip = int(best_block, 16) + best_block_time = node.getblock(best_block)['time'] + block = create_block(tip, create_coinbase(node.getblockcount() + 1), best_block_time + 1) + block.solve() + block_peer.send_blocks_and_test([block], node, success=True) + protected_peers.add(current_peer) + + self.log.info("Create 5 slow-pinging peers, making them eviction candidates") + for _ in range(5): + node.add_p2p_connection(SlowP2PInterface()) + current_peer += 1 + + self.log.info("Create 4 peers and protect them from eviction by sending us a tx") + for i in range(4): + txpeer = node.add_p2p_connection(SlowP2PInterface()) + current_peer += 1 + txpeer.sync_with_ping() + + prevtx = node.getblock(node.getblockhash(i + 1), 2)['tx'][0] + rawtx = node.createrawtransaction( + inputs=[{'txid': prevtx['txid'], 'vout': 0}], + outputs=[{node.get_deterministic_priv_key().address: 50 - 0.00125}], + ) + sigtx = node.signrawtransactionwithkey( + hexstring=rawtx, + privkeys=[node.get_deterministic_priv_key().key], + prevtxs=[{ + 'txid': prevtx['txid'], + 'vout': 0, + 'scriptPubKey': prevtx['vout'][0]['scriptPubKey']['hex'], + }], + )['hex'] + txpeer.send_message(msg_tx(FromHex(CTransaction(), sigtx))) + protected_peers.add(current_peer) + + self.log.info("Create 8 peers and protect them from eviction by having faster pings") + for _ in range(8): + fastpeer = node.add_p2p_connection(P2PInterface()) + current_peer += 1 + wait_until(lambda: "ping" in fastpeer.last_message, timeout=10) + + # Make sure by asking the node what the actual min pings are + peerinfo = node.getpeerinfo() + pings = {} + for i in range(len(peerinfo)): + pings[i] = peerinfo[i]['minping'] if 'minping' in peerinfo[i] else 1000000 + sorted_pings = sorted(pings.items(), key=lambda x: x[1]) + + # Usually the 8 fast peers are protected. In rare case of unreliable pings, + # one of the slower peers might have a faster min ping though. + for i in range(8): + protected_peers.add(sorted_pings[i][0]) + + self.log.info("Create peer that triggers the eviction mechanism") + node.add_p2p_connection(SlowP2PInterface()) + + # One of the non-protected peers must be evicted. We can't be sure which one because + # 4 peers are protected via netgroup, which is identical for all peers, + # and the eviction mechanism doesn't preserve the order of identical elements. + evicted_peers = [] + for i in range(len(node.p2ps)): + if not node.p2ps[i].is_connected: + evicted_peers.append(i) + + self.log.info("Test that one peer was evicted") + self.log.debug("{} evicted peer: {}".format(len(evicted_peers), set(evicted_peers))) + assert_equal(len(evicted_peers), 1) + + self.log.info("Test that no peer expected to be protected was evicted") + self.log.debug("{} protected peers: {}".format(len(protected_peers), protected_peers)) + assert evicted_peers[0] not in protected_peers + +if __name__ == '__main__': + P2PEvict().main() diff --git a/test/functional/test_runner.py b/test/functional/test_runner.py index 7821355e29..2053d91321 100755 --- a/test/functional/test_runner.py +++ b/test/functional/test_runner.py @@ -188,6 +188,7 @@ BASE_SCRIPTS = [ 'rpc_preciousblock.py', 'wallet_importprunedfunds.py', 'p2p_leak_tx.py', + 'p2p_eviction.py', 'rpc_signmessage.py', 'rpc_generateblock.py', 'wallet_balance.py', |