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

      GNUnet is free software: you can redistribute it and/or modify it
      under the terms of the GNU Affero General Public License as published
      by the Free Software Foundation, either version 3 of the License,
      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
      Affero General Public License for more details.

      You should have received a copy of the GNU Affero General Public License
      along with this program.  If not, see <http://www.gnu.org/licenses/>.

     SPDX-License-Identifier: AGPL3.0-or-later
 */

/**
 * @file dns/dns.h
 * @brief IPC messages between DNS API and DNS service
 * @author Christian Grothoff
 */
#ifndef DNS_H
#define DNS_H

GNUNET_NETWORK_STRUCT_BEGIN


/**
 * Message from client to DNS service to register itself.
 */
struct GNUNET_DNS_Register
{
  /**
   * Header of type #GNUNET_MESSAGE_TYPE_DNS_CLIENT_INIT
   */
  struct GNUNET_MessageHeader header;

  /**
   * NBO encoding of `enum GNUNET_DNS_Flags` for the client.
   */
  uint32_t flags GNUNET_PACKED;
};


/**
 * Message from DNS service to client: please handle a request.
 */
struct GNUNET_DNS_Request
{
  /**
   * Header of type #GNUNET_MESSAGE_TYPE_DNS_CLIENT_REQUEST
   */
  struct GNUNET_MessageHeader header;

  /**
   * Always zero.
   */
  uint32_t reserved GNUNET_PACKED;

  /**
   * Unique request ID.
   */
  uint64_t request_id GNUNET_PACKED;

  /* followed by original DNS request (without UDP header) */
};


/**
 * Message from client to DNS service: here is my reply.
 */
struct GNUNET_DNS_Response
{
  /**
   * Header of type #GNUNET_MESSAGE_TYPE_DNS_CLIENT_RESPONSE
   */
  struct GNUNET_MessageHeader header;

  /**
   * Zero to drop, 1 for no change (no payload), 2 for update (message has payload).
   */
  uint32_t drop_flag GNUNET_PACKED;

  /**
   * Unique request ID.
   */
  uint64_t request_id GNUNET_PACKED;

  /* followed by original DNS request (without UDP header) */
};


GNUNET_NETWORK_STRUCT_END

#endif
