.. efun:: int query_mud_port(void)
  int query_mud_port(object user)
  int query_mud_port(int num)

  Returns the port number the parser uses for user connections.

  If no argument is given, the port for ``this_player()`` is returned. If ``this_player()`` doesn't exist or isn't interactive, the first port number open for connections is returned.

  If a user object is given, the port used for its connection is returned. If a positive number is given, the :arg:`num`th port number the parser uses for connections is returned (given that there are that many ports). If -1 is given, the number of ports open for connections is returned.

  .. seealso:: :efun:`query_udp_port`