aboutsummaryrefslogtreecommitdiff
path: root/src/scalarproduct/gnunet-scalarproduct.c
blob: 7a86b27d247a741dcc4d5c8259d69c21934144ce (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
/*
     This file is part of GNUnet.
     Copyright (C) 2013, 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 scalarproduct/gnunet-scalarproduct.c
 * @brief scalarproduct client
 * @author Christian M. Fuchs
 */
#define GCRYPT_NO_DEPRECATED
#include <gcrypt.h>
#include <inttypes.h>

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_scalarproduct_service.h"
#include "gnunet_protocols.h"
#include "scalarproduct.h"

#define LOG(kind,...) GNUNET_log_from (kind, "gnunet-scalarproduct",__VA_ARGS__)


/**
 * the session key identifying this computation
 */
static struct GNUNET_HashCode session_key;

/**
 * PeerID we want to compute a scalar product with
 */
static struct GNUNET_PeerIdentity peer_id;

/**
 * Option -p: destination peer identity for checking message-ids with
 */
static char *input_peer_id;

/**
 * Option -p: destination peer identity for checking message-ids with
 */
static char *input_session_key;

/**
 * Option -e: vector to calculate a scalarproduct with
 */
static char *input_elements;

/**
 * Global return value
 */
static int ret = -1;

/**
 * our Scalarproduct Computation handle
 */
static struct GNUNET_SCALARPRODUCT_ComputationHandle *computation;


/**
 * Callback called if we are initiating a new computation session
 *
 * @param cls unused
 * @param status if our job was successfully processed
 */
static void
responder_callback (void *cls,
                    enum GNUNET_SCALARPRODUCT_ResponseStatus status)
{
  switch (status)
  {
  case GNUNET_SCALARPRODUCT_STATUS_SUCCESS:
    ret = 0;
    LOG (GNUNET_ERROR_TYPE_INFO,
         "Session %s concluded.\n",
         GNUNET_h2s (&session_key));
    break;
  case GNUNET_SCALARPRODUCT_STATUS_INVALID_RESPONSE:
    LOG (GNUNET_ERROR_TYPE_ERROR,
         "Session %s failed: invalid response\n",
         GNUNET_h2s (&session_key));
    break;
  case GNUNET_SCALARPRODUCT_STATUS_FAILURE:
    LOG (GNUNET_ERROR_TYPE_ERROR,
         "Session %s failed: service failure\n",
         GNUNET_h2s (&session_key));
    break;
  case GNUNET_SCALARPRODUCT_STATUS_DISCONNECTED:
    LOG (GNUNET_ERROR_TYPE_ERROR,
         "Session %s failed: service disconnect!\n",
         GNUNET_h2s (&session_key));
    break;
  default:
    LOG (GNUNET_ERROR_TYPE_ERROR,
         "Session %s failed: return code %d\n",
         GNUNET_h2s (&session_key),
         status);
  }
  computation = NULL;
  GNUNET_SCHEDULER_shutdown ();
}


/**
 * Callback called if we are initiating a new computation session
 *
 * @param cls unused
 * @param status if our job was successfully processed
 * @param result the result in gnu/gcry MPI format
 */
static void
requester_callback (void *cls,
                    enum GNUNET_SCALARPRODUCT_ResponseStatus status,
                    gcry_mpi_t result)
{
  unsigned char *buf;
  gcry_error_t rc;

  switch (status)
  {
  case GNUNET_SCALARPRODUCT_STATUS_SUCCESS:
    if (0 == (rc = gcry_mpi_aprint (GCRYMPI_FMT_HEX, &buf, NULL, result)))
    {
      ret = 0;
      fprintf (stdout,
               "%s\n",
               buf);
      fflush (stdout);
    }
    else
      LOG_GCRY (GNUNET_ERROR_TYPE_ERROR,
                "gcry_mpi_aprint",
                rc);
    break;
  case GNUNET_SCALARPRODUCT_STATUS_INVALID_RESPONSE:
    LOG (GNUNET_ERROR_TYPE_ERROR,
         "Session %s with peer %s failed: invalid response received\n",
         GNUNET_h2s (&session_key),
         GNUNET_i2s (&peer_id));
    break;
  case GNUNET_SCALARPRODUCT_STATUS_FAILURE:
    LOG (GNUNET_ERROR_TYPE_ERROR,
         "Session %s with peer %s failed: API failure\n",
         GNUNET_h2s (&session_key),
         GNUNET_i2s (&peer_id));
    break;
  case GNUNET_SCALARPRODUCT_STATUS_DISCONNECTED:
    LOG (GNUNET_ERROR_TYPE_ERROR,
         "Session %s with peer %s was disconnected from service.\n",
         GNUNET_h2s (&session_key),
         GNUNET_i2s (&peer_id));
    break;
  default:
    LOG (GNUNET_ERROR_TYPE_ERROR,
         "Session %s with peer %s failed: return code %d\n",
         GNUNET_h2s (&session_key),
         GNUNET_i2s (&peer_id),
         status);
  }
  computation = NULL;
  GNUNET_SCHEDULER_shutdown ();
}


/**
 * Task run during shutdown.
 *
 * @param cls unused
 * @param tc unused
 */
static void
shutdown_task (void *cls)
{
  if (NULL != computation)
  {
    GNUNET_SCALARPRODUCT_cancel (computation);
    ret = 1; /* aborted */
  }
}


/**
 * Main function that will be run by the scheduler.
 *
 * @param cls closure
 * @param args remaining command-line arguments
 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
 * @param cfg configuration
 */
static void
run (void *cls,
     char *const *args,
     const char *cfgfile,
     const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  char *begin = input_elements;
  char *end;
  unsigned int i;
  struct GNUNET_SCALARPRODUCT_Element *elements;
  uint32_t element_count = 0;

  if (NULL == input_elements)
  {
    LOG (GNUNET_ERROR_TYPE_ERROR,
         _("You must specify at least one message ID to check!\n"));
    return;
  }
  if ( (NULL == input_session_key) ||
       (0 == strlen (input_session_key)) )
  {
    LOG (GNUNET_ERROR_TYPE_ERROR,
         _("This program needs a session identifier for comparing vectors.\n"));
    return;
  }
  GNUNET_CRYPTO_hash (input_session_key,
                      strlen (input_session_key),
                      &session_key);
  if ( (NULL != input_peer_id) &&
       (GNUNET_OK !=
        GNUNET_CRYPTO_eddsa_public_key_from_string (input_peer_id,
                                                    strlen (input_peer_id),
                                                    &peer_id.public_key)) )
  {
    LOG (GNUNET_ERROR_TYPE_ERROR,
         _("Tried to set initiator mode, as peer ID was given. "
           "However, `%s' is not a valid peer identifier.\n"),
         input_peer_id);
    return;
  }
  if ( ('\'' == *begin) &&
       ('\'' == begin[strlen(begin)-1]) )
  {
    begin[strlen(begin)-1] = '\0';
    if (strlen (begin) > 0)
      begin++;
  }
  for (end = begin; 0 != *end; end++)
    if (*end == ';')
      element_count++;
  if (0 == element_count)
  {
    LOG (GNUNET_ERROR_TYPE_ERROR,
         _("Need elements to compute the scalarproduct, got none.\n"));
    return;
  }

  elements = GNUNET_malloc (sizeof(struct GNUNET_SCALARPRODUCT_Element) * element_count);

  for (i = 0; i < element_count;i++)
  {
    struct GNUNET_SCALARPRODUCT_Element element;
    char* separator = NULL;

    /* get the length of the current key,value; tupel */
    for (end = begin; *end != ';'; end++)
      if (*end == ',')
        separator = end;

    /* final element */
    if ( (NULL == separator) ||
         (begin == separator) ||
         (separator == end - 1) )
    {
      LOG (GNUNET_ERROR_TYPE_ERROR,
           _("Malformed input, could not parse `%s'\n"),
           begin);
      GNUNET_free (elements);
      return;
    }
    *separator = 0;
    /* read the element's key */
    GNUNET_CRYPTO_hash (begin,
                        strlen (begin),
                        &element.key);

    /* read the element's value */
    if (1 !=
        sscanf (separator + 1,
                "%" SCNd64 ";",
                &element.value) )
    {
      LOG (GNUNET_ERROR_TYPE_ERROR,
           _("Could not convert `%s' to int64_t.\n"),
           begin);
      GNUNET_free (elements);
      return;
    }
    element.value = GNUNET_htonll (element.value);
    elements[i] = element;
    begin = end + 1;
  }

  if ( ( (NULL != input_peer_id) &&
         (NULL == (computation
                   = GNUNET_SCALARPRODUCT_start_computation (cfg,
                                                             &session_key,
                                                             &peer_id,
                                                             elements, element_count,
                                                             &requester_callback,
                                                             NULL))) ) ||
       ( (NULL == input_peer_id) &&
         (NULL == (computation
                   = GNUNET_SCALARPRODUCT_accept_computation (cfg,
                                                              &session_key,
                                                              elements, element_count,
                                                              &responder_callback,
                                                              NULL))) ) )
  {
    fprintf (stderr,
             _("Failed to initiate computation, were all keys unique?\n"));
    GNUNET_free (elements);
    return;
  }
  GNUNET_free (elements);
  GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
				 NULL);
  ret = 0;
}


/**
 * The main function to the scalarproduct client.
 *
 * @param argc number of arguments from the command line
 * @param argv command line arguments
 * @return 0 ok, 1 on error
 */
int
main (int argc, char *const *argv)
{
  struct GNUNET_GETOPT_CommandLineOption options[] = {

    GNUNET_GETOPT_option_string ('e',
                                 "elements",
                                 "\"key1,val1;key2,val2;...,keyn,valn;\"",
                                 gettext_noop ("A comma separated list of elements to compare as vector with our remote peer."),
                                 &input_elements),

    GNUNET_GETOPT_option_string ('e',
                                 "elements",
                                 "\"key1,val1;key2,val2;...,keyn,valn;\"",
                                 gettext_noop ("A comma separated list of elements to compare as vector with our remote peer."),
                                 &input_elements),

    GNUNET_GETOPT_option_string ('p',
                                 "peer",
                                 "PEERID",
                                 gettext_noop ("[Optional] peer to calculate our scalarproduct with. If this parameter is not given, the service will wait for a remote peer to compute the request."),
                                 &input_peer_id),

    GNUNET_GETOPT_option_string ('k',
                                 "key",
                                 "TRANSACTION_ID",
                                 gettext_noop ("Transaction ID shared with peer."),
                                 &input_session_key),

    GNUNET_GETOPT_OPTION_END
  };

  return (GNUNET_OK ==
          GNUNET_PROGRAM_run (argc,
                              argv,
                              "gnunet-scalarproduct",
                              gettext_noop ("Calculate the Vectorproduct with a GNUnet peer."),
                              options, &run, NULL)) ? ret : 1;
}

/* end of gnunet-scalarproduct.c */