2 This file is part of GNUnet
3 (C) 2004, 2005, 2006, 2007, 2009 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 2, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file datastore/datastore.h
23 * @brief structs for communication between datastore service and API
24 * @author Christian Grothoff
30 #define DEBUG_DATASTORE GNUNET_EXTRA_LOGGING
32 #include "gnunet_util_lib.h"
35 * Message from datastore service informing client about
36 * the current size of the datastore.
41 * Type is GNUNET_MESSAGE_TYPE_DATASTORE_RESERVE.
43 struct GNUNET_MessageHeader header;
46 * Number of items to reserve.
48 uint32_t entries GNUNET_PACKED;
51 * Number of bytes to reserve.
53 uint64_t amount GNUNET_PACKED;
58 * Message from datastore service informing client about
59 * the success or failure of a requested operation.
60 * This header is optionally followed by a variable-size,
61 * 0-terminated error message.
66 * Type is GNUNET_MESSAGE_TYPE_DATASTORE_STATUS.
68 struct GNUNET_MessageHeader header;
71 * Status code, -1 for errors.
73 int32_t status GNUNET_PACKED;
76 * Minimum expiration time required for content to be stored
77 * by the datacache at this time, zero for unknown or no limit.
79 struct GNUNET_TIME_AbsoluteNBO min_expiration;
85 * Message from datastore client informing service that
86 * the remainder of the reserved bytes can now be released
89 struct ReleaseReserveMessage
92 * Type is GNUNET_MESSAGE_TYPE_DATASTORE_RELEASE_RESERVE.
94 struct GNUNET_MessageHeader header;
99 int32_t rid GNUNET_PACKED;
105 * Message to the datastore service asking about specific
111 * Type is GNUNET_MESSAGE_TYPE_DATASTORE_GET. Size
112 * can either be "sizeof(struct GetMessage)" or
113 * "sizeof(struct GetMessage) - sizeof(GNUNET_HashCode)"!
115 struct GNUNET_MessageHeader header;
118 * Desired content type. (actually an enum GNUNET_BLOCK_Type)
120 uint32_t type GNUNET_PACKED;
123 * Offset of the result.
125 uint64_t offset GNUNET_PACKED;
128 * Desired key (optional). Check the "size" of the
129 * header to see if the key is actually present.
131 GNUNET_HashCode key GNUNET_PACKED;
137 * Message to the datastore service asking about zero
140 struct GetZeroAnonymityMessage
143 * Type is GNUNET_MESSAGE_TYPE_DATASTORE_GET_ZERO_ANONYMITY.
145 struct GNUNET_MessageHeader header;
148 * Desired content type (actually an enum GNUNET_BLOCK_Type)
150 uint32_t type GNUNET_PACKED;
153 * Offset of the result.
155 uint64_t offset GNUNET_PACKED;
161 * Message to the datastore service requesting an update
162 * to the priority or expiration for some content.
167 * Type is GNUNET_MESSAGE_TYPE_DATASTORE_UPDATE.
169 struct GNUNET_MessageHeader header;
172 * Desired priority increase.
174 int32_t priority GNUNET_PACKED;
177 * Desired new expiration time.
179 struct GNUNET_TIME_AbsoluteNBO expiration;
182 * Unique ID for the content.
190 * Message transmitting content from or to the datastore
196 * Type is either GNUNET_MESSAGE_TYPE_DATASTORE_PUT,
197 * GNUNET_MESSAGE_TYPE_DATASTORE_REMOVE or
198 * GNUNET_MESSAGE_TYPE_DATASTORE_DATA. Depending on the message
199 * type, some fields may simply have values of zero.
201 struct GNUNET_MessageHeader header;
204 * Reservation ID to use; use zero for none.
206 uint32_t rid GNUNET_PACKED;
209 * Number of bytes in the item (NBO).
211 uint32_t size GNUNET_PACKED;
214 * Type of the item (NBO), zero for remove, (actually an enum GNUNET_BLOCK_Type)
216 uint32_t type GNUNET_PACKED;
219 * Priority of the item (NBO), zero for remove.
221 uint32_t priority GNUNET_PACKED;
224 * Desired anonymity level (NBO), zero for remove.
226 uint32_t anonymity GNUNET_PACKED;
229 * Desired replication level. 0 from service to API.
231 uint32_t replication GNUNET_PACKED;
236 uint32_t reserved GNUNET_PACKED;
239 * Unique ID for the content (can be used for UPDATE);
240 * can be zero for remove (which indicates that
241 * the datastore should use whatever UID matches
242 * the key and content).
247 * Expiration time (NBO); zero for remove.
249 struct GNUNET_TIME_AbsoluteNBO expiration;
252 * Key under which the item can be found.
254 GNUNET_HashCode key GNUNET_PACKED;