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3 (C) 2004, 2005, 2006, 2008, 2009 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
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13 General Public License for more details.
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22 * @file include/gnunet_dht_service.h
23 * @brief API to the DHT service
24 * @author Christian Grothoff
27 #ifndef GNUNET_DHT_SERVICE_H
28 #define GNUNET_DHT_SERVICE_H
30 #include "gnunet_util_lib.h"
35 #if 0 /* keep Emacsens' auto-indent happy */
42 * Connection to the DHT service.
44 struct GNUNET_DHT_Handle;
48 * Initialize the connection with the DHT service.
50 * @param cfg configuration to use
51 * @param sched scheduler to use
52 * @return NULL on error
54 struct GNUNET_DHT_Handle *
55 GNUNET_DHT_connect (struct GNUNET_SCHEDULER_Handle *sched,
56 const struct GNUNET_CONFIGURATION_Handle *cfg);
60 * Shutdown connection with the DHT service.
62 * @param h connection to shut down
65 GNUNET_DHT_disconnect (struct GNUNET_DHT_Handle *h);
69 * Handle to control a GET operation.
71 struct GNUNET_DHT_GetHandle;
75 * Iterator called on each result obtained for a GET
79 * @param exp when will this value expire
80 * @param key key of the result
81 * @param type type of the result
82 * @param size number of bytes in data
83 * @param data pointer to the result data
85 typedef void (*GNUNET_DHT_Iterator)(void *cls,
86 struct GNUNET_TIME_Absolute exp,
87 const GNUNET_HashCode * key,
95 * Perform an asynchronous GET operation on the DHT identified.
97 * @param h handle to the DHT service
98 * @param type expected type of the response object
99 * @param key the key to look up
100 * @param iter function to call on each result
101 * @param iter_cls closure for iter
102 * @return handle to stop the async get
104 struct GNUNET_DHT_GetHandle *
105 GNUNET_DHT_get_start (struct GNUNET_DHT_Handle *h,
107 const GNUNET_HashCode * key,
108 GNUNET_DHT_Iterator iter,
113 * Iterator called on each result obtained from a FIND_PEER
117 * @param key the key that was searched
118 * @param data the HELLO of the peer that was returned
120 typedef void (*GNUNET_DHT_PeerIterator)(void *cls,
121 const GNUNET_HashCode * key,
125 * Perform an asynchronous FIND_PEER operation on the DHT.
127 * @param h handle to the DHT service
128 * @param key the key to look up
129 * @param iter function to call on each result
130 * @param iter_cls closure for iter
132 * @return handle to stop the request
134 struct GNUNET_DHT_GetHandle *
135 GNUNET_DHT_find_peer_start (struct GNUNET_DHT_Handle *h,
136 const GNUNET_HashCode * key,
137 GNUNET_DHT_PeerIterator iter,
141 * Stop async DHT-get. Frees associated resources.
143 * @param record GET operation to stop.
146 GNUNET_DHT_get_stop (struct GNUNET_DHT_Handle *handle, struct GNUNET_DHT_GetHandle *get_handle);
150 * Perform a PUT operation on the DHT identified by 'table' storing
151 * a binding of 'key' to 'value'. The peer does not have to be part
152 * of the table (if so, we will attempt to locate a peer that is!)
154 * @param h handle to DHT service
155 * @param key the key to store under
156 * @param type type of the value
157 * @param size number of bytes in data; must be less than 64k
158 * @param data the data to store
159 * @param exp desired expiration time for the value
160 * @param cont continuation to call when done;
161 * reason will be TIMEOUT on error,
162 * reason will be PREREQ_DONE on success
163 * @param cont_cls closure for cont
166 int GNUNET_DHT_put (struct GNUNET_DHT_Handle *h,
167 const GNUNET_HashCode * key,
171 struct GNUNET_TIME_Relative exp,
172 GNUNET_SCHEDULER_Task cont,
176 #if 0 /* keep Emacsens' auto-indent happy */
185 /* gnunet_dht_service.h */