This file is indexed.

/usr/include/gnunet/gnunet_dht_service.h is in gnunet-dev 0.10.1-4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
/*
      This file is part of GNUnet
      (C) 2004-2013 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 3, 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 include/gnunet_dht_service.h
 * @brief API to the DHT service
 * @author Christian Grothoff
 * @defgroup dht Distributed Hash Table
 * @{
 */

#ifndef GNUNET_DHT_SERVICE_H
#define GNUNET_DHT_SERVICE_H

#include "gnunet_util_lib.h"
#include "gnunet_block_lib.h"
#include "gnunet_hello_lib.h"

#ifdef __cplusplus
extern "C"
{
#if 0                           /* keep Emacsens' auto-indent happy */
}
#endif
#endif


/**
 * Default republication frequency for stored data in the DHT.
 */
#define GNUNET_DHT_DEFAULT_REPUBLISH_FREQUENCY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MINUTES, 60)



/**
 * Connection to the DHT service.
 */
struct GNUNET_DHT_Handle;

/**
 * Handle to control a get operation.
 */
struct GNUNET_DHT_GetHandle;

/**
 * Handle to control a find peer operation.
 */
struct GNUNET_DHT_FindPeerHandle;


/**
 * Options for routing.
 */
enum GNUNET_DHT_RouteOption
{
  /**
   * Default.  Do nothing special.
   */
  GNUNET_DHT_RO_NONE = 0,

  /**
   * Each peer along the way should look at 'enc' (otherwise
   * only the k-peers closest to the key should look at it).
   */
  GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE = 1,

  /**
   * We should keep track of the route that the message
   * took in the P2P network.
   */
  GNUNET_DHT_RO_RECORD_ROUTE = 2,

  /**
   * This is a 'FIND-PEER' request, so approximate results are fine.
   */
  GNUNET_DHT_RO_FIND_PEER = 4,

  /**
   * Possible message option for query key randomization.
   */
  GNUNET_DHT_RO_BART = 8
};


/**
 * Initialize the connection with the DHT service.
 *
 * @param cfg configuration to use
 * @param ht_len size of the internal hash table to use for
 *               processing multiple GET/FIND requests in parallel
 * @return NULL on error
 */
struct GNUNET_DHT_Handle *
GNUNET_DHT_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
                    unsigned int ht_len);


/**
 * Shutdown connection with the DHT service.
 *
 * @param handle connection to shut down
 */
void
GNUNET_DHT_disconnect (struct GNUNET_DHT_Handle *handle);


/* *************** Standard API: get and put ******************* */


/**
 * Opaque handle to cancel a PUT operation.
 */
struct GNUNET_DHT_PutHandle;


/**
 * Type of a PUT continuation.  You must not call
 * #GNUNET_DHT_disconnect in this continuation.
 *
 * @param cls closure
 * @param success #GNUNET_OK if the PUT was transmitted,
 *                #GNUNET_NO on timeout,
 *                #GNUNET_SYSERR on disconnect from service
 *                after the PUT message was transmitted
 *                (so we don't know if it was received or not)
 */
typedef void (*GNUNET_DHT_PutContinuation)(void *cls,
					   int success);


/**
 * Perform a PUT operation storing data in the DHT.
 *
 * @param handle handle to DHT service
 * @param key the key to store under
 * @param desired_replication_level estimate of how many
 *                nearest peers this request should reach
 * @param options routing options for this message
 * @param type type of the value
 * @param size number of bytes in @a data; must be less than 64k
 * @param data the data to store
 * @param exp desired expiration time for the value
 * @param timeout how long to wait for transmission of this request
 * @param cont continuation to call when done (transmitting request to service)
 *        You must not call #GNUNET_DHT_disconnect in this continuation
 * @param cont_cls closure for @a cont
 * @return handle to cancel the "PUT" operation, NULL on error
 *        (size too big)
 */
struct GNUNET_DHT_PutHandle *
GNUNET_DHT_put (struct GNUNET_DHT_Handle *handle,
                const struct GNUNET_HashCode *key,
                uint32_t desired_replication_level,
                enum GNUNET_DHT_RouteOption options,
                enum GNUNET_BLOCK_Type type,
                size_t size, const void *data,
                struct GNUNET_TIME_Absolute exp,
                struct GNUNET_TIME_Relative timeout,
                GNUNET_DHT_PutContinuation cont,
                void *cont_cls);


/**
 * Cancels a DHT PUT operation.  Note that the PUT request may still
 * go out over the network (we can't stop that); However, if the PUT
 * has not yet been sent to the service, cancelling the PUT will stop
 * this from happening (but there is no way for the user of this API
 * to tell if that is the case).  The only use for this API is to
 * prevent a later call to 'cont' from #GNUNET_DHT_put (i.e. because
 * the system is shutting down).
 *
 * @param ph put operation to cancel ('cont' will no longer be called)
 */
void
GNUNET_DHT_put_cancel (struct GNUNET_DHT_PutHandle *ph);


/**
 * Iterator called on each result obtained for a DHT
 * operation that expects a reply
 *
 * @param cls closure
 * @param exp when will this value expire
 * @param key key of the result
 * @param get_path peers on reply path (or NULL if not recorded)
 *                 [0] = datastore's first neighbor, [length - 1] = local peer
 * @param get_path_length number of entries in @a get_path
 * @param put_path peers on the PUT path (or NULL if not recorded)
 *                 [0] = origin, [length - 1] = datastore
 * @param put_path_length number of entries in @a put_path
 * @param type type of the result
 * @param size number of bytes in @a data
 * @param data pointer to the result data
 */
typedef void (*GNUNET_DHT_GetIterator) (void *cls,
                                        struct GNUNET_TIME_Absolute exp,
                                        const struct GNUNET_HashCode *key,
                                        const struct GNUNET_PeerIdentity *get_path,
					unsigned int get_path_length,
                                        const struct GNUNET_PeerIdentity *put_path,
					unsigned int put_path_length,
                                        enum GNUNET_BLOCK_Type type,
                                        size_t size, const void *data);


/**
 * Perform an asynchronous GET operation on the DHT identified. See
 * also #GNUNET_BLOCK_evaluate.
 *
 * @param handle handle to the DHT service
 * @param type expected type of the response object
 * @param key the key to look up
 * @param desired_replication_level estimate of how many
                  nearest peers this request should reach
 * @param options routing options for this message
 * @param xquery extended query data (can be NULL, depending on type)
 * @param xquery_size number of bytes in @a xquery
 * @param iter function to call on each result
 * @param iter_cls closure for @a iter
 *
 * @return handle to stop the async get
 */
struct GNUNET_DHT_GetHandle *
GNUNET_DHT_get_start (struct GNUNET_DHT_Handle *handle,
                      enum GNUNET_BLOCK_Type type,
                      const struct GNUNET_HashCode *key,
                      uint32_t desired_replication_level,
                      enum GNUNET_DHT_RouteOption options,
                      const void *xquery, size_t xquery_size,
                      GNUNET_DHT_GetIterator iter, void *iter_cls);


/**
 * Tell the DHT not to return any of the following known results
 * to this client.
 *
 * @param get_handle get operation for which results should be filtered
 * @param num_results number of results to be blocked that are
 *        provided in this call (size of the @a results array)
 * @param results array of hash codes over the 'data' of the results
 *        to be blocked
 */
void
GNUNET_DHT_get_filter_known_results (struct GNUNET_DHT_GetHandle *get_handle,
				     unsigned int num_results,
				     const struct GNUNET_HashCode *results);

/**
 * Stop async DHT-get.  Frees associated resources.
 *
 * @param get_handle GET operation to stop.
 *
 * On return get_handle will no longer be valid, caller
 * must not use again!!!
 */
void
GNUNET_DHT_get_stop (struct GNUNET_DHT_GetHandle *get_handle);


/* *************** Extended API: monitor ******************* */

/**
 * Handle to monitor requests
 */
struct GNUNET_DHT_MonitorHandle;

/**
 * Callback called on each GET request going through the DHT.
 *
 * @param cls Closure.
 * @param options Options, for instance RecordRoute, DemultiplexEverywhere.
 * @param type The type of data in the request.
 * @param hop_count Hop count so far.
 * @param path_length number of entries in @a path (or 0 if not recorded).
 * @param path peers on the GET path (or NULL if not recorded).
 * @param desired_replication_level Desired replication level.
 * @param key Key of the requested data.
 */
typedef void (*GNUNET_DHT_MonitorGetCB) (void *cls,
                                         enum GNUNET_DHT_RouteOption options,
                                         enum GNUNET_BLOCK_Type type,
                                         uint32_t hop_count,
                                         uint32_t desired_replication_level,
                                         unsigned int path_length,
                                         const struct GNUNET_PeerIdentity *path,
                                         const struct GNUNET_HashCode * key);

/**
 * Callback called on each GET reply going through the DHT.
 *
 * @param cls Closure.
 * @param type The type of data in the result.
 * @param get_path Peers on GET path (or NULL if not recorded).
 * @param get_path_length number of entries in @a get_path.
 * @param put_path peers on the PUT path (or NULL if not recorded).
 * @param put_path_length number of entries in @a get_path.
 * @param exp Expiration time of the data.
 * @param key Key of the data.
 * @param data Pointer to the result data.
 * @param size Number of bytes in @a data.
 */
typedef void (*GNUNET_DHT_MonitorGetRespCB) (void *cls,
                                             enum GNUNET_BLOCK_Type type,
                                             const struct GNUNET_PeerIdentity *get_path,
                                             unsigned int get_path_length,
                                             const struct GNUNET_PeerIdentity *put_path,
                                             unsigned int put_path_length,
                                             struct GNUNET_TIME_Absolute exp,
                                             const struct GNUNET_HashCode *key,
                                             const void *data,
                                             size_t size);

/**
 * Callback called on each PUT request going through the DHT.
 *
 * @param cls Closure.
 * @param options Options, for instance RecordRoute, DemultiplexEverywhere.
 * @param type The type of data in the request.
 * @param hop_count Hop count so far.
 * @param path_length number of entries in @a path (or 0 if not recorded).
 * @param path peers on the PUT path (or NULL if not recorded).
 * @param desired_replication_level Desired replication level.
 * @param exp Expiration time of the data.
 * @param key Key under which data is to be stored.
 * @param data Pointer to the data carried.
 * @param size Number of bytes in data.
 */
typedef void (*GNUNET_DHT_MonitorPutCB) (void *cls,
                                         enum GNUNET_DHT_RouteOption options,
                                         enum GNUNET_BLOCK_Type type,
                                         uint32_t hop_count,
                                         uint32_t desired_replication_level,
                                         unsigned int path_length,
                                         const struct GNUNET_PeerIdentity *path,
                                         struct GNUNET_TIME_Absolute exp,
                                         const struct GNUNET_HashCode *key,
                                         const void *data,
                                         size_t size);

/**
 * Start monitoring the local DHT service.
 *
 * @param handle Handle to the DHT service.
 * @param type Type of blocks that are of interest.
 * @param key Key of data of interest, NULL for all.
 * @param get_cb Callback to process monitored get messages.
 * @param get_resp_cb Callback to process monitored get response messages.
 * @param put_cb Callback to process monitored put messages.
 * @param cb_cls Closure for callbacks
 * @return Handle to stop monitoring.
 */
struct GNUNET_DHT_MonitorHandle *
GNUNET_DHT_monitor_start (struct GNUNET_DHT_Handle *handle,
                          enum GNUNET_BLOCK_Type type,
                          const struct GNUNET_HashCode *key,
                          GNUNET_DHT_MonitorGetCB get_cb,
                          GNUNET_DHT_MonitorGetRespCB get_resp_cb,
                          GNUNET_DHT_MonitorPutCB put_cb,
                          void *cb_cls);


/**
 * Stop monitoring.
 * On return handle will no longer be valid, caller must not use again!!!
 *
 * @param handle The handle to the monitor request returned by monitor_start.
 */
void
GNUNET_DHT_monitor_stop (struct GNUNET_DHT_MonitorHandle *handle);


#if 0                           /* keep Emacsens' auto-indent happy */
{
#endif
#ifdef __cplusplus
}
#endif

/** @} */ /* end of group dht */


#endif
/* gnunet_dht_service.h */