/*
     This file is part of GNUnet.
     Copyright (C) 2009, 2012 GNUnet e.V.

     GNUnet 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, or (at your
     option) any later version.

     GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
*/

/**
 * @author Christian Grothoff
 * @file util/resolver.h
 */
#ifndef RESOLVER_H
#define RESOLVER_H

#include "gnunet_common.h"

GNUNET_NETWORK_STRUCT_BEGIN

/**
 * Request for the resolver.  Followed by either the "struct sockaddr"
 * or the 0-terminated hostname.
 *
 * The response will be one or more messages of type
 * RESOLVER_RESPONSE, each with the message header immediately
 * followed by the requested data (0-terminated hostname or struct
 * in[6]_addr, depending on direction).  The last RESOLVER_RESPONSE
 * will just be a header without any data (used to indicate the end of
 * the list).
 */
struct GNUNET_RESOLVER_GetMessage
{
  /**
   * Type:  GNUNET_MESSAGE_TYPE_RESOLVER_REQUEST
   */
  struct GNUNET_MessageHeader header;

  /**
   * GNUNET_YES to get hostname from IP,
   * GNUNET_NO to get IP from hostname.
   */
  int32_t direction GNUNET_PACKED;

  /**
   * Address family to use (AF_INET, AF_INET6 or AF_UNSPEC).
   */
  int32_t af GNUNET_PACKED;

  /* followed by 0-terminated string for A/AAAA-lookup or
     by 'struct in_addr' / 'struct in6_addr' for reverse lookup */

};
GNUNET_NETWORK_STRUCT_END

#endif
