text: #!/usr/bin/env python3
  # Copyright (c) 2017 The Zenacoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  """Test message sending before handshake completion.
  
  A node should never send anything other than VERSION/VERACK/REJECT until it's
  received a VERACK.
  
  This test connects to a node and sends it a few messages, trying to intice it
  into sending us something it shouldn't.
  
  Also test that nodes that send unsupported service bits to zenacoind are disconnected
  and don't receive a VERACK. Unsupported service bits are currently 1 << 5 and
  1 << 7 (until August 1st 2018)."""
  
  from test_framework.mininode import *
  from test_framework.test_framework import ZenacoinTestFramework
  from test_framework.util import *
  
  banscore = 10
  
  class CLazyNode(NodeConnCB):
      def __init__(self):
          super().__init__()
          self.unexpected_msg = False
          self.ever_connected = False
  
      def bad_message(self, message):
          self.unexpected_msg = True
          self.log.info("should not have received message: %s" % message.command)
  
      def on_open(self, conn):
          self.connected = True
          self.ever_connected = True
  
      def on_version(self, conn, message): self.bad_message(message)
      def on_verack(self, conn, message): self.bad_message(message)
      def on_reject(self, conn, message): self.bad_message(message)
      def on_inv(self, conn, message): self.bad_message(message)
      def on_addr(self, conn, message): self.bad_message(message)
      def on_alert(self, conn, message): self.bad_message(message)
      def on_getdata(self, conn, message): self.bad_message(message)
      def on_getblocks(self, conn, message): self.bad_message(message)
      def on_tx(self, conn, message): self.bad_message(message)
      def on_block(self, conn, message): self.bad_message(message)
      def on_getaddr(self, conn, message): self.bad_message(message)
      def on_headers(self, conn, message): self.bad_message(message)
      def on_getheaders(self, conn, message): self.bad_message(message)
      def on_ping(self, conn, message): self.bad_message(message)
      def on_mempool(self, conn): self.bad_message(message)
      def on_pong(self, conn, message): self.bad_message(message)
      def on_feefilter(self, conn, message): self.bad_message(message)
      def on_sendheaders(self, conn, message): self.bad_message(message)
      def on_sendcmpct(self, conn, message): self.bad_message(message)
      def on_cmpctblock(self, conn, message): self.bad_message(message)
      def on_getblocktxn(self, conn, message): self.bad_message(message)
      def on_blocktxn(self, conn, message): self.bad_message(message)
  
  # Node that never sends a version. We'll use this to send a bunch of messages
  # anyway, and eventually get disconnected.
  class CNodeNoVersionBan(CLazyNode):
      # send a bunch of veracks without sending a message. This should get us disconnected.
      # NOTE: implementation-specific check here. Remove if zenacoind ban behavior changes
      def on_open(self, conn):
          super().on_open(conn)
          for i in range(banscore):
              self.send_message(msg_verack())
  
      def on_reject(self, conn, message): pass
  
  # Node that never sends a version. This one just sits idle and hopes to receive
  # any message (it shouldn't!)
  class CNodeNoVersionIdle(CLazyNode):
      def __init__(self):
          super().__init__()
  
  # Node that sends a version but not a verack.
  class CNodeNoVerackIdle(CLazyNode):
      def __init__(self):
          self.version_received = False
          super().__init__()
  
      def on_reject(self, conn, message): pass
      def on_verack(self, conn, message): pass
      # When version is received, don't reply with a verack. Instead, see if the
      # node will give us a message that it shouldn't. This is not an exhaustive
      # list!
      def on_version(self, conn, message):
          self.version_received = True
          conn.send_message(msg_ping())
          conn.send_message(msg_getaddr())
  
  class P2PLeakTest(ZenacoinTestFramework):
      def set_test_params(self):
          self.num_nodes = 1
          self.extra_args = [['-banscore='+str(banscore)]]
  
      def run_test(self):
          no_version_bannode = CNodeNoVersionBan()
          no_version_idlenode = CNodeNoVersionIdle()
          no_verack_idlenode = CNodeNoVerackIdle()
          unsupported_service_bit5_node = CLazyNode()
          unsupported_service_bit7_node = CLazyNode()
  
          self.nodes[0].setmocktime(1501545600)  # August 1st 2017
          connections = []
          connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], no_version_bannode, send_version=False))
          connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], no_version_idlenode, send_version=False))
          connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], no_verack_idlenode))
          connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], unsupported_service_bit5_node, services=NODE_NETWORK|NODE_UNSUPPORTED_SERVICE_BIT_5))
          connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], unsupported_service_bit7_node, services=NODE_NETWORK|NODE_UNSUPPORTED_SERVICE_BIT_7))
          no_version_bannode.add_connection(connections[0])
          no_version_idlenode.add_connection(connections[1])
          no_verack_idlenode.add_connection(connections[2])
          unsupported_service_bit5_node.add_connection(connections[3])
          unsupported_service_bit7_node.add_connection(connections[4])
  
          NetworkThread().start()  # Start up network handling in another thread
  
          wait_until(lambda: no_version_bannode.ever_connected, timeout=10, lock=mininode_lock)
          wait_until(lambda: no_version_idlenode.ever_connected, timeout=10, lock=mininode_lock)
          wait_until(lambda: no_verack_idlenode.version_received, timeout=10, lock=mininode_lock)
          wait_until(lambda: unsupported_service_bit5_node.ever_connected, timeout=10, lock=mininode_lock)
          wait_until(lambda: unsupported_service_bit7_node.ever_connected, timeout=10, lock=mininode_lock)
  
          # Mine a block and make sure that it's not sent to the connected nodes
          self.nodes[0].generate(1)
  
          #Give the node enough time to possibly leak out a message
          time.sleep(5)
  
          #This node should have been banned
          assert not no_version_bannode.connected
  
          # These nodes should have been disconnected
          assert not unsupported_service_bit5_node.connected
          assert not unsupported_service_bit7_node.connected
  
          [conn.disconnect_node() for conn in connections]
  
          # Wait until all connections are closed
          wait_until(lambda: len(self.nodes[0].getpeerinfo()) == 0)
  
          # Make sure no unexpected messages came in
          assert(no_version_bannode.unexpected_msg == False)
          assert(no_version_idlenode.unexpected_msg == False)
          assert(no_verack_idlenode.unexpected_msg == False)
          assert not unsupported_service_bit5_node.unexpected_msg
          assert not unsupported_service_bit7_node.unexpected_msg
  
          self.log.info("Service bits 5 and 7 are allowed after August 1st 2018")
          self.nodes[0].setmocktime(1533168000)  # August 2nd 2018
  
          allowed_service_bit5_node = NodeConnCB()
          allowed_service_bit7_node = NodeConnCB()
  
          connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], allowed_service_bit5_node, services=NODE_NETWORK|NODE_UNSUPPORTED_SERVICE_BIT_5))
          connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], allowed_service_bit7_node, services=NODE_NETWORK|NODE_UNSUPPORTED_SERVICE_BIT_7))
          allowed_service_bit5_node.add_connection(connections[5])
          allowed_service_bit7_node.add_connection(connections[6])
  
          NetworkThread().start()  # Network thread stopped when all previous NodeConnCBs disconnected. Restart it
  
          wait_until(lambda: allowed_service_bit5_node.message_count["verack"], lock=mininode_lock)
          wait_until(lambda: allowed_service_bit7_node.message_count["verack"], lock=mininode_lock)
  
  if __name__ == '__main__':
      P2PLeakTest().main()
  