2 This file is part of GNUnet
3 (C) 2012, 2013 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 3, or (at your
8 option) any later version.
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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 include/gnunet_namestore_plugin.h
23 * @brief plugin API for the namestore database backend
24 * @author Christian Grothoff
26 #ifndef GNUNET_NAMESTORE_PLUGIN_H
27 #define GNUNET_NAMESTORE_PLUGIN_H
29 #include "gnunet_common.h"
30 #include "gnunet_util_lib.h"
31 #include "gnunet_namestore_service.h"
36 #if 0 /* keep Emacsens' auto-indent happy */
43 * Function called for matching blocks.
46 * @param block lookup result
48 typedef void (*GNUNET_NAMESTORE_BlockCallback) (void *cls,
49 const struct GNUNET_NAMESTORE_Block *block);
53 * Function called by for each matching record.
56 * @param zone_key private key of the zone
57 * @param label name that is being mapped (at most 255 characters long)
58 * @param rd_count number of entries in 'rd' array
59 * @param rd array of records with data to store
61 typedef void (*GNUNET_NAMESTORE_RecordIterator) (void *cls,
62 const struct GNUNET_CRYPTO_EccPrivateKey *private_key,
64 unsigned int rd_count,
65 const struct GNUNET_NAMESTORE_RecordData *rd);
69 * @brief struct returned by the initialization function of the plugin
71 struct GNUNET_NAMESTORE_PluginFunctions
75 * Closure to pass to all plugin functions.
80 * Cache a block in the datastore. Overwrites (older) existing blocks
81 * for the same zone and label.
83 * @param cls closure (internal context for the plugin)
84 * @param block block to cache
85 * @return GNUNET_OK on success, else GNUNET_SYSERR
87 int (*cache_block) (void *cls,
88 const struct GNUNET_NAMESTORE_Block *block);
92 * Get the block for a particular zone and label in the
93 * datastore. Will return at most one result to the iterator.
95 * @param cls closure (internal context for the plugin)
96 * @param query hash of public key derived from the zone and the label
97 * @param iter function to call with the result
98 * @param iter_cls closure for iter
99 * @return GNUNET_OK on success, GNUNET_NO if there were no results, GNUNET_SYSERR on error
100 * 'iter' will have been called unless the return value is 'GNUNET_SYSERR'
102 int (*lookup_block) (void *cls,
103 const struct GNUNET_HashCode *query,
104 GNUNET_NAMESTORE_BlockCallback iter, void *iter_cls);
109 * Store a record in the datastore for which we are the authority.
110 * Removes any existing record in the same zone with the same name.
112 * @param cls closure (internal context for the plugin)
113 * @param zone private key of the zone
114 * @param label name of the record in the zone
115 * @param rd_count number of entries in 'rd' array, 0 to delete all records
116 * @param rd array of records with data to store
117 * @return GNUNET_OK on success, else GNUNET_SYSERR
119 int (*store_records) (void *cls,
120 const struct GNUNET_CRYPTO_EccPrivateKey *zone,
122 unsigned int rd_count,
123 const struct GNUNET_NAMESTORE_RecordData *rd);
127 * Iterate over the results for a particular zone in the
128 * datastore. Will return at most one result to the iterator.
130 * @param cls closure (internal context for the plugin)
131 * @param zone private key of the zone
132 * @param offset offset in the list of all matching records
133 * @param iter function to call with the result
134 * @param iter_cls closure for iter
135 * @return GNUNET_OK on success, GNUNET_NO if there were no results, GNUNET_SYSERR on error
136 * 'iter' will have been called unless the return value is 'GNUNET_SYSERR'
138 int (*iterate_records) (void *cls,
139 const struct GNUNET_CRYPTO_EccPrivateKey *zone,
141 GNUNET_NAMESTORE_RecordIterator iter, void *iter_cls);
145 * Look for an existing PKEY delegation record for a given public key.
146 * Returns at most one result to the iterator.
148 * @param cls closure (internal context for the plugin)
149 * @param zone private key of the zone to look up in, never NULL
150 * @param value_zone public key of the target zone (value), never NULL
151 * @param iter function to call with the result
152 * @param iter_cls closure for iter
153 * @return GNUNET_OK on success, GNUNET_NO if there were no results, GNUNET_SYSERR on error
154 * 'iter' will have been called unless the return value is 'GNUNET_SYSERR'
156 int (*zone_to_name) (void *cls,
157 const struct GNUNET_CRYPTO_EccPrivateKey *zone,
158 const struct GNUNET_CRYPTO_EccPublicKey *value_zone,
159 GNUNET_NAMESTORE_RecordIterator iter, void *iter_cls);
165 #if 0 /* keep Emacsens' auto-indent happy */
172 /* end of gnunet_namestore_plugin.h */