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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 addr response caching"""
import time
from test_framework.messages import msg_getaddr
from test_framework.p2p import (
P2PInterface,
p2p_lock
)
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
)
# As defined in net_processing.
MAX_ADDR_TO_SEND = 1000
MAX_PCT_ADDR_TO_SEND = 23
class AddrReceiver(P2PInterface):
def __init__(self):
super().__init__()
self.received_addrs = None
def get_received_addrs(self):
with p2p_lock:
return self.received_addrs
def on_addr(self, message):
self.received_addrs = []
for addr in message.addrs:
self.received_addrs.append(addr.ip)
def addr_received(self):
return self.received_addrs is not None
class AddrTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = False
self.num_nodes = 1
def run_test(self):
self.log.info('Fill peer AddrMan with a lot of records')
for i in range(10000):
first_octet = i >> 8
second_octet = i % 256
a = "{}.{}.1.1".format(first_octet, second_octet)
self.nodes[0].addpeeraddress(a, 8333)
# Need to make sure we hit MAX_ADDR_TO_SEND records in the addr response later because
# only a fraction of all known addresses can be cached and returned.
assert(len(self.nodes[0].getnodeaddresses(0)) > int(MAX_ADDR_TO_SEND / (MAX_PCT_ADDR_TO_SEND / 100)))
responses = []
self.log.info('Send many addr requests within short time to receive same response')
N = 5
cur_mock_time = int(time.time())
for i in range(N):
addr_receiver = self.nodes[0].add_p2p_connection(AddrReceiver())
addr_receiver.send_and_ping(msg_getaddr())
# Trigger response
cur_mock_time += 5 * 60
self.nodes[0].setmocktime(cur_mock_time)
addr_receiver.wait_until(addr_receiver.addr_received)
responses.append(addr_receiver.get_received_addrs())
for response in responses[1:]:
assert_equal(response, responses[0])
assert(len(response) == MAX_ADDR_TO_SEND)
cur_mock_time += 3 * 24 * 60 * 60
self.nodes[0].setmocktime(cur_mock_time)
self.log.info('After time passed, see a new response to addr request')
last_addr_receiver = self.nodes[0].add_p2p_connection(AddrReceiver())
last_addr_receiver.send_and_ping(msg_getaddr())
# Trigger response
cur_mock_time += 5 * 60
self.nodes[0].setmocktime(cur_mock_time)
last_addr_receiver.wait_until(last_addr_receiver.addr_received)
# new response is different
assert(set(responses[0]) != set(last_addr_receiver.get_received_addrs()))
if __name__ == '__main__':
AddrTest().main()
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