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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 (
CAddress,
NODE_NETWORK,
NODE_WITNESS,
msg_addr,
msg_getaddr,
)
from test_framework.mininode import (
P2PInterface,
p2p_lock
)
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
)
MAX_ADDR_TO_SEND = 1000
def gen_addrs(n):
addrs = []
for i in range(n):
addr = CAddress()
addr.time = int(time.time())
addr.nServices = NODE_NETWORK | NODE_WITNESS
# Use first octets to occupy different AddrMan buckets
first_octet = i >> 8
second_octet = i % 256
addr.ip = "{}.{}.1.1".format(first_octet, second_octet)
addr.port = 8333
addrs.append(addr)
return addrs
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('Create connection that sends and requests addr messages')
addr_source = self.nodes[0].add_p2p_connection(P2PInterface())
msg_send_addrs = msg_addr()
self.log.info('Fill peer AddrMan with a lot of records')
# Since these addrs are sent from the same source, not all of them will be stored,
# because we allocate a limited number of AddrMan buckets per addr source.
total_addrs = 10000
addrs = gen_addrs(total_addrs)
for i in range(int(total_addrs/MAX_ADDR_TO_SEND)):
msg_send_addrs.addrs = addrs[i * MAX_ADDR_TO_SEND:(i + 1) * MAX_ADDR_TO_SEND]
addr_source.send_and_ping(msg_send_addrs)
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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