text: #!/usr/bin/env python3
  # Copyright (c) 2014-2017 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 running bitcoind with the -rpcbind and -rpcallowip options."""
  
  import socket
  import sys
  
  from test_framework.test_framework import HempyCoinTestFramework, SkipTest
  from test_framework.util import *
  from test_framework.netutil import *
  
  class RPCBindTest(HempyCoinTestFramework):
      def set_test_params(self):
          self.setup_clean_chain = True
          self.num_nodes = 1
  
      def setup_network(self):
          self.add_nodes(self.num_nodes, None)
  
      def run_bind_test(self, allow_ips, connect_to, addresses, expected):
          '''
          Start a node with requested rpcallowip and rpcbind parameters,
          then try to connect, and check if the set of bound addresses
          matches the expected set.
          '''
          self.log.info("Bind test for %s" % str(addresses))
          expected = [(addr_to_hex(addr), port) for (addr, port) in expected]
          base_args = ['-disablewallet', '-nolisten']
          if allow_ips:
              base_args += ['-rpcallowip=' + x for x in allow_ips]
          binds = ['-rpcbind='+addr for addr in addresses]
          self.nodes[0].rpchost = connect_to
          self.start_node(0, base_args + binds)
          pid = self.nodes[0].process.pid
          assert_equal(set(get_bind_addrs(pid)), set(expected))
          self.stop_nodes()
  
      def run_allowip_test(self, allow_ips, rpchost, rpcport):
          '''
          Start a node with rpcallow IP, and request getnetworkinfo
          at a non-localhost IP.
          '''
          self.log.info("Allow IP test for %s:%d" % (rpchost, rpcport))
          base_args = ['-disablewallet', '-nolisten'] + ['-rpcallowip='+x for x in allow_ips]
          self.nodes[0].rpchost = None
          self.start_nodes([base_args])
          # connect to node through non-loopback interface
          node = get_rpc_proxy(rpc_url(get_datadir_path(self.options.tmpdir, 0), 0, "%s:%d" % (rpchost, rpcport)), 0, coveragedir=self.options.coveragedir)
          node.getnetworkinfo()
          self.stop_nodes()
  
      def run_test(self):
          # due to OS-specific network stats queries, this test works only on Linux
          if not sys.platform.startswith('linux'):
              raise SkipTest("This test can only be run on linux.")
          # find the first non-loopback interface for testing
          non_loopback_ip = None
          for name,ip in all_interfaces():
              if ip != '127.0.0.1':
                  non_loopback_ip = ip
                  break
          if non_loopback_ip is None:
              raise SkipTest("This test requires at least one non-loopback IPv4 interface.")
          try:
              s = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
              s.connect(("::1",1))
              s.close
          except OSError:
              raise SkipTest("This test requires IPv6 support.")
  
          self.log.info("Using interface %s for testing" % non_loopback_ip)
  
          defaultport = rpc_port(0)
  
          # check default without rpcallowip (IPv4 and IPv6 localhost)
          self.run_bind_test(None, '127.0.0.1', [],
              [('127.0.0.1', defaultport), ('::1', defaultport)])
          # check default with rpcallowip (IPv6 any)
          self.run_bind_test(['127.0.0.1'], '127.0.0.1', [],
              [('::0', defaultport)])
          # check only IPv4 localhost (explicit)
          self.run_bind_test(['127.0.0.1'], '127.0.0.1', ['127.0.0.1'],
              [('127.0.0.1', defaultport)])
          # check only IPv4 localhost (explicit) with alternative port
          self.run_bind_test(['127.0.0.1'], '127.0.0.1:32171', ['127.0.0.1:32171'],
              [('127.0.0.1', 32171)])
          # check only IPv4 localhost (explicit) with multiple alternative ports on same host
          self.run_bind_test(['127.0.0.1'], '127.0.0.1:32171', ['127.0.0.1:32171', '127.0.0.1:32172'],
              [('127.0.0.1', 32171), ('127.0.0.1', 32172)])
          # check only IPv6 localhost (explicit)
          self.run_bind_test(['[::1]'], '[::1]', ['[::1]'],
              [('::1', defaultport)])
          # check both IPv4 and IPv6 localhost (explicit)
          self.run_bind_test(['127.0.0.1'], '127.0.0.1', ['127.0.0.1', '[::1]'],
              [('127.0.0.1', defaultport), ('::1', defaultport)])
          # check only non-loopback interface
          self.run_bind_test([non_loopback_ip], non_loopback_ip, [non_loopback_ip],
              [(non_loopback_ip, defaultport)])
  
          # Check that with invalid rpcallowip, we are denied
          self.run_allowip_test([non_loopback_ip], non_loopback_ip, defaultport)
          assert_raises_rpc_error(-342, "non-JSON HTTP response with '403 Forbidden' from server", self.run_allowip_test, ['1.1.1.1'], non_loopback_ip, defaultport)
  
  if __name__ == '__main__':
      RPCBindTest().main()
  