text: #!/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 addrv2 relay
  """
  
  from test_framework.messages import (
      CAddress,
      msg_addrv2,
      NODE_NETWORK,
  )
  from test_framework.mininode import P2PInterface
  from test_framework.test_framework import BitcoinTestFramework
  from test_framework.util import assert_equal, wait_until
  
  
  class AddrReceiver(P2PInterface):
      addrv2_received_and_checked = False
  
      def __init__(self):
          super().__init__(support_addrv2 = True)
  
      def on_addrv2(self, message):
          for addr in message.addrs:
              assert_equal(addr.nServices, 1)
              assert addr.ip.startswith('123.123.123.')
              assert 8333 <= addr.port < 8343
          self.addrv2_received_and_checked = True
  
      def wait_for_addrv2(self):
          wait_until(lambda: "addrv2" in self.last_message)
  
  
  class AddrTest(BitcoinTestFramework):
      def set_test_params(self):
          self.setup_clean_chain = True
          self.num_nodes = 1
  
      def run_test(self):
          ADDRS = []
          for i in range(10):
              addr = CAddress()
              addr.time = int(self.mocktime) + i
              addr.nServices = NODE_NETWORK
              addr.ip = "123.123.123.{}".format(i % 256)
              addr.port = 8333 + i
              ADDRS.append(addr)
  
          self.log.info('Create connection that sends addrv2 messages')
          addr_source = self.nodes[0].add_p2p_connection(P2PInterface())
  
          msg = msg_addrv2()
  
          self.log.info('Send too-large addrv2 message')
          msg.addrs = ADDRS * 101
          with self.nodes[0].assert_debug_log(['addrv2 message size = 1010']):
              addr_source.send_and_ping(msg)
  
          self.nodes[0].disconnect_p2ps()
  
          self.log.info('Check that addrv2 message content is relayed and added to addrman')
          addr_source = self.nodes[0].add_p2p_connection(P2PInterface())
          addr_receiver = self.nodes[0].add_p2p_connection(AddrReceiver())
  
          msg.addrs = ADDRS
          with self.nodes[0].assert_debug_log([
                  'Added 10 addresses from 127.0.0.1: 0 tried',
                  'received: addrv2 (131 bytes) peer=1',
                  'sending addrv2 (131 bytes) peer=2',
          ]):
              addr_source.send_and_ping(msg)
              self.bump_mocktime(30 * 60)
              addr_receiver.wait_for_addrv2()
  
          assert addr_receiver.addrv2_received_and_checked
  
          self.nodes[0].disconnect_p2ps()
  
  
  if __name__ == '__main__':
      AddrTest().main()
  