text: /*
     Unix SMB/CIFS implementation.
  
     Echo structures and headers, example async client library
  
     Copyright (C) 2010 Kai Blin  <kai@samba.org>
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
  
  #ifndef __LIBECHO_H__
  #define __LIBECHO_H__
  
  /* The echo port is fixed, so just set a constant. */
  #define ECHO_PORT 7
  
  /** Send an echo request to an echo server
   *
   *@param mem_ctx        talloc memory context to use
   *@param ev             tevent context to use
   *@param server_address address of the server as a string
   *@param message        echo message to send
   *@return tevent_req with the active request or NULL on out-of-memory
   */
  struct tevent_req *echo_request_send(TALLOC_CTX *mem_ctx,
  				     struct tevent_context *ev,
  				     const char *server_address,
  				     const char *message);
  
  /** Get the echo response from an echo server
   *
   * Once the echo_request_send async request is finished, you can call
   * this function to collect the echo reply.
   *
   *@param req      tevent_req struct returned from echo_request_send
   *@param mem_ctx  talloc memory context to use for the reply string
   *@param message  pointer to a string that will be allocated and filled with
                    the echo reply.
   *@return NTSTATUS code depending on the async request result
   */
  NTSTATUS echo_request_recv(struct tevent_req *req,
  			   TALLOC_CTX *mem_ctx,
  			   char **message);
  
  #endif /*__LIBECHO_H__*/
  