text: #!/usr/bin/env python3
  # Copyright (c) 2014-2016 The Bitcoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or https://www.opensource.org/licenses/mit-license.php .
  
  #
  # Test node handling
  #
  
  from test_framework.test_framework import BitcoinTestFramework
  from test_framework.util import assert_equal, connect_nodes_bi, p2p_port, \
      start_node, stop_node
  
  import time
  import urllib.parse
  
  class NodeHandlingTest (BitcoinTestFramework):
  
      def __init__(self):
          super().__init__()
          self.num_nodes = 4
          self.setup_clean_chain = False
  
      def run_test(self):
          ###########################
          # setban/listbanned tests #
          ###########################
          assert_equal(len(self.nodes[2].getpeerinfo()), 4) #we should have 4 nodes at this point
          self.nodes[2].setban("127.0.0.1", "add")
          time.sleep(3) #wait till the nodes are disconected
          assert_equal(len(self.nodes[2].getpeerinfo()), 0) #all nodes must be disconnected at this point
          assert_equal(len(self.nodes[2].listbanned()), 1)
          self.nodes[2].clearbanned()
          assert_equal(len(self.nodes[2].listbanned()), 0)
          self.nodes[2].setban("127.0.0.0/24", "add")
          assert_equal(len(self.nodes[2].listbanned()), 1)
          try:
              self.nodes[2].setban("127.0.0.1", "add") #throws exception because 127.0.0.1 is within range 127.0.0.0/24
          except:
              pass
          assert_equal(len(self.nodes[2].listbanned()), 1) #still only one banned ip because 127.0.0.1 is within the range of 127.0.0.0/24
          try:
              self.nodes[2].setban("127.0.0.1", "remove")
          except:
              pass
          assert_equal(len(self.nodes[2].listbanned()), 1)
          self.nodes[2].setban("127.0.0.0/24", "remove")
          assert_equal(len(self.nodes[2].listbanned()), 0)
          self.nodes[2].clearbanned()
          assert_equal(len(self.nodes[2].listbanned()), 0)
  
          ##test persisted banlist
          self.nodes[2].setban("127.0.0.0/32", "add")
          self.nodes[2].setban("127.0.0.0/24", "add")
          self.nodes[2].setban("192.168.0.1", "add", 1) #ban for 1 seconds
          self.nodes[2].setban("2001:4d48:ac57:400:cacf:e9ff:fe1d:9c63/19", "add", 1000) #ban for 1000 seconds
          listBeforeShutdown = self.nodes[2].listbanned();
          assert_equal("192.168.0.1/32", listBeforeShutdown[2]['address']) #must be here
          time.sleep(2) #make 100% sure we expired 192.168.0.1 node time
  
          #stop node
          stop_node(self.nodes[2], 2)
  
          self.nodes[2] = start_node(2, self.options.tmpdir)
          listAfterShutdown = self.nodes[2].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)
  
          ###########################
          # RPC disconnectnode test #
          ###########################
          url = urllib.parse.urlparse(self.nodes[1].url)
          self.nodes[0].disconnectnode(url.hostname+":"+str(p2p_port(1)))
          time.sleep(2) #disconnecting a node needs a little bit of time
          for node in self.nodes[0].getpeerinfo():
              assert(node['addr'] != url.hostname+":"+str(p2p_port(1)))
  
          connect_nodes_bi(self.nodes,0,1) #reconnect the node
          found = False
          for node in self.nodes[0].getpeerinfo():
              if node['addr'] == url.hostname+":"+str(p2p_port(1)):
                  found = True
          assert(found)
  
  if __name__ == '__main__':
      NodeHandlingTest ().main ()
  