code: def request_forward_agent(self, handler):
          
          m = Message()
          m.add_byte(cMSG_CHANNEL_REQUEST)
          m.add_int(self.remote_chanid)
          m.add_string("auth-agent-req@openssh.com")
          m.add_boolean(False)
          self.transport._send_user_message(m)
          self.transport._set_forward_agent_handler(handler)
          return True
docs: Request for a forward SSH Agent on this channel.
          This is only valid for an ssh-agent from OpenSSH !!!
  
          :param handler:
              a required callable handler to use for incoming SSH Agent
              connections
  
          :return: True if we are ok, else False
              (at that time we always return ok)
  
          :raises: SSHException in case of channel problem.