text: #!/usr/bin/env python3
  # Copyright (c) 2014-2018 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 disconnect and ban behavior"""
  import time
  
  from test_framework.test_framework import ChuckramTestFramework
  from test_framework.util import (
      assert_equal,
      assert_raises_rpc_error,
      connect_nodes_bi,
      wait_until,
  )
  
  class DisconnectBanTest(ChuckramTestFramework):
      def set_test_params(self):
          self.num_nodes = 2
  
      def run_test(self):
          self.log.info("Test setban and listbanned RPCs")
  
          self.log.info("setban: successfully ban single IP address")
          assert_equal(len(self.nodes[1].getpeerinfo()), 2)  # node1 should have 2 connections to node0 at this point
          self.nodes[1].setban("127.0.0.1", "add")
          wait_until(lambda: len(self.nodes[1].getpeerinfo()) == 0, timeout=10)
          assert_equal(len(self.nodes[1].getpeerinfo()), 0)  # all nodes must be disconnected at this point
          assert_equal(len(self.nodes[1].listbanned()), 1)
  
          self.log.info("clearbanned: successfully clear ban list")
          self.nodes[1].clearbanned()
          assert_equal(len(self.nodes[1].listbanned()), 0)
          self.nodes[1].setban("127.0.0.0/24", "add")
  
          self.log.info("setban: fail to ban an already banned subnet")
          assert_equal(len(self.nodes[1].listbanned()), 1)
          assert_raises_rpc_error(-23, "IP/Subnet already banned", self.nodes[1].setban, "127.0.0.1", "add")
  
          self.log.info("setban: fail to ban an invalid subnet")
          assert_raises_rpc_error(-30, "Error: Invalid IP/Subnet", self.nodes[1].setban, "127.0.0.1/42", "add")
          assert_equal(len(self.nodes[1].listbanned()), 1)  # still only one banned ip because 127.0.0.1 is within the range of 127.0.0.0/24
  
          self.log.info("setban remove: fail to unban a non-banned subnet")
          assert_raises_rpc_error(-30, "Error: Unban failed", self.nodes[1].setban, "127.0.0.1", "remove")
          assert_equal(len(self.nodes[1].listbanned()), 1)
  
          self.log.info("setban remove: successfully unban subnet")
          self.nodes[1].setban("127.0.0.0/24", "remove")
          assert_equal(len(self.nodes[1].listbanned()), 0)
          self.nodes[1].clearbanned()
          assert_equal(len(self.nodes[1].listbanned()), 0)
  
          self.log.info("setban: test persistence across node restart")
          self.nodes[1].setban("127.0.0.0/32", "add")
          self.nodes[1].setban("127.0.0.0/24", "add")
          # Set the mocktime so we can control when bans expire
          old_time = int(time.time())
          self.nodes[1].setmocktime(old_time)
          self.nodes[1].setban("192.168.0.1", "add", 1)  # ban for 1 seconds
          self.nodes[1].setban("2001:4d48:ac57:400:cacf:e9ff:fe1d:9c63/19", "add", 1000)  # ban for 1000 seconds
          listBeforeShutdown = self.nodes[1].listbanned()
          assert_equal("192.168.0.1/32", listBeforeShutdown[2]['address'])
          # Move time forward by 3 seconds so the third ban has expired
          self.nodes[1].setmocktime(old_time + 3)
          assert_equal(len(self.nodes[1].listbanned()), 3)
  
          self.stop_node(1)
          self.start_node(1)
  
          listAfterShutdown = self.nodes[1].listbanned()
          assert_equal("127.0.0.0/24", listAfterShutdown[0]['address'])
          assert_equal("127.0.0.0/32", listAfterShutdown[1]['address'])
          assert_equal("/19" in listAfterShutdown[2]['address'], True)
  
          # Clear ban lists
          self.nodes[1].clearbanned()
          connect_nodes_bi(self.nodes, 0, 1)
  
          self.log.info("Test disconnectnode RPCs")
  
          self.log.info("disconnectnode: fail to disconnect when calling with address and nodeid")
          address1 = self.nodes[0].getpeerinfo()[0]['addr']
          node1 = self.nodes[0].getpeerinfo()[0]['addr']
          assert_raises_rpc_error(-32602, "Only one of address and nodeid should be provided.", self.nodes[0].disconnectnode, address=address1, nodeid=node1)
  
          self.log.info("disconnectnode: fail to disconnect when calling with junk address")
          assert_raises_rpc_error(-29, "Node not found in connected nodes", self.nodes[0].disconnectnode, address="221B Baker Street")
  
          self.log.info("disconnectnode: successfully disconnect node by address")
          address1 = self.nodes[0].getpeerinfo()[0]['addr']
          self.nodes[0].disconnectnode(address=address1)
          wait_until(lambda: len(self.nodes[0].getpeerinfo()) == 1, timeout=10)
          assert not [node for node in self.nodes[0].getpeerinfo() if node['addr'] == address1]
  
          self.log.info("disconnectnode: successfully reconnect node")
          connect_nodes_bi(self.nodes, 0, 1)  # reconnect the node
          assert_equal(len(self.nodes[0].getpeerinfo()), 2)
          assert [node for node in self.nodes[0].getpeerinfo() if node['addr'] == address1]
  
          self.log.info("disconnectnode: successfully disconnect node by node id")
          id1 = self.nodes[0].getpeerinfo()[0]['id']
          self.nodes[0].disconnectnode(nodeid=id1)
          wait_until(lambda: len(self.nodes[0].getpeerinfo()) == 1, timeout=10)
          assert not [node for node in self.nodes[0].getpeerinfo() if node['id'] == id1]
  
  if __name__ == '__main__':
      DisconnectBanTest().main()
  