aboutsummaryrefslogtreecommitdiff
path: root/src/set/set.h
blob: 34b97736c083dcade6e7acee3db02f1632289f88 (plain) (blame)
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
401
402
/*
     This file is part of GNUnet.
     Copyright (C) 2012-2014 GNUnet e.V.

     GNUnet is free software: you can redistribute it and/or modify it
     under the terms of the GNU Affero General Public License as published
     by the Free Software Foundation, either version 3 of the License,
     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
     Affero General Public License for more details.
    
     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.

     SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
 * @file set/set.h
 * @brief messages used for the set api
 * @author Florian Dold
 * @author Christian Grothoff
 */
#ifndef SET_H
#define SET_H

#include "platform.h"
#include "gnunet_common.h"
#include "gnunet_set_service.h"

GNUNET_NETWORK_STRUCT_BEGIN

/**
 * Message sent by the client to the service to ask starting
 * a new set to perform operations with.  Includes the desired
 * set operation type.
 */
struct GNUNET_SET_CreateMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_CREATE
   */
  struct GNUNET_MessageHeader header;

  /**
   * Operation type, values of `enum GNUNET_SET_OperationType`
   */
  uint32_t operation GNUNET_PACKED;
};


/**
 * Message sent by the client to the service to start listening for
 * incoming requests to perform a certain type of set operation for a
 * certain type of application.
 */
struct GNUNET_SET_ListenMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_LISTEN
   */
  struct GNUNET_MessageHeader header;

  /**
   * Operation type, values of `enum GNUNET_SET_OperationType`
   */
  uint32_t operation GNUNET_PACKED;

  /**
   * application id
   */
  struct GNUNET_HashCode app_id;

};


/**
 * Message sent by a listening client to the service to accept
 * performing the operation with the other peer.
 */
struct GNUNET_SET_AcceptMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_ACCEPT
   */
  struct GNUNET_MessageHeader header;

  /**
   * ID of the incoming request we want to accept.
   */
  uint32_t accept_reject_id GNUNET_PACKED;

  /**
   * Request ID to identify responses.
   */
  uint32_t request_id GNUNET_PACKED;

  /**
   * How should results be sent to us?
   * See `enum GNUNET_SET_ResultMode`.
   */
  uint32_t result_mode GNUNET_PACKED;

  /**
   * Always use delta operation instead of sending full sets,
   * even it it's less efficient.
   */
  uint8_t force_delta;

  /**
   * Always send full sets, even if delta operations would
   * be more efficient.
   */
  uint8_t force_full;

  /**
   * #GNUNET_YES to fail operations where Byzantine faults
   * are suspected
   */
  uint8_t byzantine;

  /**
   * Lower bound for the set size, used only when
   * byzantine mode is enabled.
   */
  uint8_t byzantine_lower_bound;
};


/**
 * Message sent by a listening client to the service to reject
 * performing the operation with the other peer.
 */
struct GNUNET_SET_RejectMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_REJECT
   */
  struct GNUNET_MessageHeader header;

  /**
   * ID of the incoming request we want to reject.
   */
  uint32_t accept_reject_id GNUNET_PACKED;

};


/**
 * A request for an operation with another client.
 */
struct GNUNET_SET_RequestMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_REQUEST.
   */
  struct GNUNET_MessageHeader header;

  /**
   * ID of the to identify the request when accepting or
   * rejecting it.
   */
  uint32_t accept_id GNUNET_PACKED;

  /**
   * Identity of the requesting peer.
   */
  struct GNUNET_PeerIdentity peer_id;

  /* rest: context message, that is, application-specific
     message to convince listener to pick up */
};


/**
 * Message sent by client to service to initiate a set operation as a
 * client (not as listener).  A set (which determines the operation
 * type) must already exist in association with this client.
 */
struct GNUNET_SET_EvaluateMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_EVALUATE
   */
  struct GNUNET_MessageHeader header;

  /**
   * How should results be sent to us?
   * See `enum GNUNET_SET_ResultMode`.
   */
  uint32_t result_mode GNUNET_PACKED;

  /**
   * Peer to evaluate the operation with
   */
  struct GNUNET_PeerIdentity target_peer;

  /**
   * Application id
   */
  struct GNUNET_HashCode app_id;

  /**
   * Id of our set to evaluate, chosen implicitly by the client when it
   * calls #GNUNET_SET_commit().
   */
  uint32_t request_id GNUNET_PACKED;

  /**
   * Always use delta operation instead of sending full sets,
   * even it it's less efficient.
   */
  uint8_t force_delta;

  /**
   * Always send full sets, even if delta operations would
   * be more efficient.
   */
  uint8_t force_full;

  /**
   * #GNUNET_YES to fail operations where Byzantine faults
   * are suspected
   */
  uint8_t byzantine;

  /**
   * Lower bound for the set size, used only when
   * byzantine mode is enabled.
   */
  uint8_t byzantine_lower_bound;

  /* rest: context message, that is, application-specific
     message to convince listener to pick up */
};


/**
 * Message sent by the service to the client to indicate an
 * element that is removed (set intersection) or added
 * (set union) or part of the final result, depending on
 * options specified for the operation.
 */
struct GNUNET_SET_ResultMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_RESULT
   */
  struct GNUNET_MessageHeader header;

  /**
   * Current set size.
   */
  uint64_t current_size;

  /**
   * id the result belongs to
   */
  uint32_t request_id GNUNET_PACKED;

  /**
   * Was the evaluation successful? Contains
   * an `enum GNUNET_SET_Status` in NBO.
   */
  uint16_t result_status GNUNET_PACKED;

  /**
   * Type of the element attachted to the message, if any.
   */
  uint16_t element_type GNUNET_PACKED;

  /* rest: the actual element */
};


/**
 * Message sent by client to the service to add or remove
 * an element to/from the set.
 */
struct GNUNET_SET_ElementMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_ADD or
   *       #GNUNET_MESSAGE_TYPE_SET_REMOVE
   */
  struct GNUNET_MessageHeader header;

  /**
   * Type of the element to add or remove.
   */
  uint16_t element_type GNUNET_PACKED;

  /**
   * For alignment, always zero.
   */
  uint16_t reserved GNUNET_PACKED;

  /* rest: the actual element */
};


/**
 * Sent to the service by the client
 * in order to cancel a set operation.
 */
struct GNUNET_SET_CancelMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_CANCEL
   */
  struct GNUNET_MessageHeader header;

  /**
   * ID of the request we want to cancel.
   */
  uint32_t request_id GNUNET_PACKED;
};


/**
 * Set element transmitted by service to client in response to a set
 * iteration request.
 */
struct GNUNET_SET_IterResponseMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_ITER_ELEMENT
   */
  struct GNUNET_MessageHeader header;

  /**
   * To which set iteration does this reponse belong to?  First
   * iteration (per client) has counter zero. Wraps around.
   */
  uint16_t iteration_id GNUNET_PACKED;

  /**
   * Type of the element attachted to the message,
   * if any.
   */
  uint16_t element_type GNUNET_PACKED;

  /* rest: element */
};


/**
 * Client acknowledges receiving element in iteration.
 */
struct GNUNET_SET_IterAckMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_ITER_ACK
   */
  struct GNUNET_MessageHeader header;

  /**
   * Non-zero if the service should continue sending elements.
   */
  uint32_t send_more;
};


/**
 * Server responds to a lazy copy request.
 */
struct GNUNET_SET_CopyLazyResponseMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_COPY_LAZY_RESPONSE
   */
  struct GNUNET_MessageHeader header;

  /**
   * Temporary name for the copied set.
   */
  uint32_t cookie;
};


/**
 * Client connects to a lazily copied set.
 */
struct GNUNET_SET_CopyLazyConnectMessage
{
  /**
   * Type: #GNUNET_MESSAGE_TYPE_SET_COPY_LAZY_CONNECT
   */
  struct GNUNET_MessageHeader header;

  /**
   * Temporary name for the copied set.
   */
  uint32_t cookie;
};


GNUNET_NETWORK_STRUCT_END

#endif