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/*
This file is part of GNUnet
(C) 2004, 2005, 2006, 2007, 2009 Christian Grothoff (and other contributing authors)
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 2, 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file datastore/datastore.h
* @brief structs for communication between datastore service and API
* @author Christian Grothoff
*/
#ifndef DATASTORE_H
#define DATASTORE_H
#include "gnunet_util_lib.h"
GNUNET_NETWORK_STRUCT_BEGIN
/**
* Message from datastore service informing client about
* the current size of the datastore.
*/
struct ReserveMessage
{
/**
* Type is GNUNET_MESSAGE_TYPE_DATASTORE_RESERVE.
*/
struct GNUNET_MessageHeader header;
/**
* Number of items to reserve.
*/
uint32_t entries GNUNET_PACKED;
/**
* Number of bytes to reserve.
*/
uint64_t amount GNUNET_PACKED;
};
/**
* Message from datastore service informing client about
* the success or failure of a requested operation.
* This header is optionally followed by a variable-size,
* 0-terminated error message.
*/
struct StatusMessage
{
/**
* Type is GNUNET_MESSAGE_TYPE_DATASTORE_STATUS.
*/
struct GNUNET_MessageHeader header;
/**
* Status code, -1 for errors.
*/
int32_t status GNUNET_PACKED;
/**
* Minimum expiration time required for content to be stored
* by the datacache at this time, zero for unknown or no limit.
*/
struct GNUNET_TIME_AbsoluteNBO min_expiration;
};
/**
* Message from datastore client informing service that
* the remainder of the reserved bytes can now be released
* for other requests.
*/
struct ReleaseReserveMessage
{
/**
* Type is GNUNET_MESSAGE_TYPE_DATASTORE_RELEASE_RESERVE.
*/
struct GNUNET_MessageHeader header;
/**
* Reservation id.
*/
int32_t rid GNUNET_PACKED;
};
/**
* Message to the datastore service asking about specific
* content.
*/
struct GetMessage
{
/**
* Type is GNUNET_MESSAGE_TYPE_DATASTORE_GET. Size
* can either be "sizeof(struct GetMessage)" or
* "sizeof(struct GetMessage) - sizeof(struct GNUNET_HashCode)"!
*/
struct GNUNET_MessageHeader header;
/**
* Desired content type. (actually an enum GNUNET_BLOCK_Type)
*/
uint32_t type GNUNET_PACKED;
/**
* Offset of the result.
*/
uint64_t offset GNUNET_PACKED;
/**
* Desired key (optional). Check the "size" of the
* header to see if the key is actually present.
*/
struct GNUNET_HashCode key;
};
/**
* Message to the datastore service asking about zero
* anonymity content.
*/
struct GetZeroAnonymityMessage
{
/**
* Type is GNUNET_MESSAGE_TYPE_DATASTORE_GET_ZERO_ANONYMITY.
*/
struct GNUNET_MessageHeader header;
/**
* Desired content type (actually an enum GNUNET_BLOCK_Type)
*/
uint32_t type GNUNET_PACKED;
/**
* Offset of the result.
*/
uint64_t offset GNUNET_PACKED;
};
/**
* Message to the datastore service requesting an update
* to the priority or expiration for some content.
*/
struct UpdateMessage
{
/**
* Type is GNUNET_MESSAGE_TYPE_DATASTORE_UPDATE.
*/
struct GNUNET_MessageHeader header;
/**
* Desired priority increase.
*/
int32_t priority GNUNET_PACKED;
/**
* Desired new expiration time.
*/
struct GNUNET_TIME_AbsoluteNBO expiration;
/**
* Unique ID for the content.
*/
uint64_t uid;
};
/**
* Message transmitting content from or to the datastore
* service.
*/
struct DataMessage
{
/**
* Type is either GNUNET_MESSAGE_TYPE_DATASTORE_PUT,
* GNUNET_MESSAGE_TYPE_DATASTORE_REMOVE or
* GNUNET_MESSAGE_TYPE_DATASTORE_DATA. Depending on the message
* type, some fields may simply have values of zero.
*/
struct GNUNET_MessageHeader header;
/**
* Reservation ID to use; use zero for none.
*/
uint32_t rid GNUNET_PACKED;
/**
* Number of bytes in the item (NBO).
*/
uint32_t size GNUNET_PACKED;
/**
* Type of the item (NBO), zero for remove, (actually an enum GNUNET_BLOCK_Type)
*/
uint32_t type GNUNET_PACKED;
/**
* Priority of the item (NBO), zero for remove.
*/
uint32_t priority GNUNET_PACKED;
/**
* Desired anonymity level (NBO), zero for remove.
*/
uint32_t anonymity GNUNET_PACKED;
/**
* Desired replication level. 0 from service to API.
*/
uint32_t replication GNUNET_PACKED;
/**
* For alignment.
*/
uint32_t reserved GNUNET_PACKED;
/**
* Unique ID for the content (can be used for UPDATE);
* can be zero for remove (which indicates that
* the datastore should use whatever UID matches
* the key and content).
*/
uint64_t uid;
/**
* Expiration time (NBO); zero for remove.
*/
struct GNUNET_TIME_AbsoluteNBO expiration;
/**
* Key under which the item can be found.
*/
struct GNUNET_HashCode key;
};
GNUNET_NETWORK_STRUCT_END
#endif
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