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#!/usr/bin/env python3
# Copyright (c) 2020 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 ping message
"""
import time
from test_framework.messages import msg_pong
from test_framework.p2p import P2PInterface
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal
PING_INTERVAL = 2 * 60
class msg_pong_corrupt(msg_pong):
def serialize(self):
return b""
class NodePongAdd1(P2PInterface):
def on_ping(self, message):
self.send_message(msg_pong(message.nonce + 1))
class NodeNoPong(P2PInterface):
def on_ping(self, message):
pass
TIMEOUT_INTERVAL = 20 * 60
class PingPongTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 1
# Set the peer connection timeout low. It does not matter for this
# test, as long as it is less than TIMEOUT_INTERVAL.
self.extra_args = [['-peertimeout=1']]
def check_peer_info(self, *, pingtime, minping, pingwait):
stats = self.nodes[0].getpeerinfo()[0]
assert_equal(stats.pop('pingtime', None), pingtime)
assert_equal(stats.pop('minping', None), minping)
assert_equal(stats.pop('pingwait', None), pingwait)
def mock_forward(self, delta):
self.mock_time += delta
self.nodes[0].setmocktime(self.mock_time)
def run_test(self):
self.mock_time = int(time.time())
self.mock_forward(0)
self.log.info('Check that ping is sent after connection is established')
no_pong_node = self.nodes[0].add_p2p_connection(NodeNoPong())
self.mock_forward(3)
assert no_pong_node.last_message.pop('ping').nonce != 0
self.check_peer_info(pingtime=None, minping=None, pingwait=3)
self.log.info('Reply without nonce cancels ping')
with self.nodes[0].assert_debug_log(['pong peer=0: Short payload']):
no_pong_node.send_and_ping(msg_pong_corrupt())
self.check_peer_info(pingtime=None, minping=None, pingwait=None)
self.log.info('Reply without ping')
with self.nodes[0].assert_debug_log([
'pong peer=0: Unsolicited pong without ping, 0 expected, 0 received, 8 bytes',
]):
no_pong_node.send_and_ping(msg_pong())
self.check_peer_info(pingtime=None, minping=None, pingwait=None)
self.log.info('Reply with wrong nonce does not cancel ping')
assert 'ping' not in no_pong_node.last_message
with self.nodes[0].assert_debug_log(['pong peer=0: Nonce mismatch']):
# mock time PING_INTERVAL ahead to trigger node into sending a ping
self.mock_forward(PING_INTERVAL + 1)
no_pong_node.wait_until(lambda: 'ping' in no_pong_node.last_message)
self.mock_forward(9)
# Send the wrong pong
no_pong_node.send_and_ping(msg_pong(no_pong_node.last_message.pop('ping').nonce - 1))
self.check_peer_info(pingtime=None, minping=None, pingwait=9)
self.log.info('Reply with zero nonce does cancel ping')
with self.nodes[0].assert_debug_log(['pong peer=0: Nonce zero']):
no_pong_node.send_and_ping(msg_pong(0))
self.check_peer_info(pingtime=None, minping=None, pingwait=None)
self.log.info('Check that ping is properly reported on RPC')
assert 'ping' not in no_pong_node.last_message
# mock time PING_INTERVAL ahead to trigger node into sending a ping
self.mock_forward(PING_INTERVAL + 1)
no_pong_node.wait_until(lambda: 'ping' in no_pong_node.last_message)
ping_delay = 29
self.mock_forward(ping_delay)
no_pong_node.wait_until(lambda: 'ping' in no_pong_node.last_message)
no_pong_node.send_and_ping(msg_pong(no_pong_node.last_message.pop('ping').nonce))
self.check_peer_info(pingtime=ping_delay, minping=ping_delay, pingwait=None)
self.log.info('Check that minping is decreased after a fast roundtrip')
# mock time PING_INTERVAL ahead to trigger node into sending a ping
self.mock_forward(PING_INTERVAL + 1)
no_pong_node.wait_until(lambda: 'ping' in no_pong_node.last_message)
ping_delay = 9
self.mock_forward(ping_delay)
no_pong_node.wait_until(lambda: 'ping' in no_pong_node.last_message)
no_pong_node.send_and_ping(msg_pong(no_pong_node.last_message.pop('ping').nonce))
self.check_peer_info(pingtime=ping_delay, minping=ping_delay, pingwait=None)
self.log.info('Check that peer is disconnected after ping timeout')
assert 'ping' not in no_pong_node.last_message
self.nodes[0].ping()
no_pong_node.wait_until(lambda: 'ping' in no_pong_node.last_message)
with self.nodes[0].assert_debug_log(['ping timeout: 1201.000000s']):
self.mock_forward(TIMEOUT_INTERVAL // 2)
# Check that sending a ping does not prevent the disconnect
no_pong_node.sync_with_ping()
self.mock_forward(TIMEOUT_INTERVAL // 2 + 1)
no_pong_node.wait_for_disconnect()
if __name__ == '__main__':
PingPongTest().main()
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