summaryrefslogtreecommitdiff
path: root/src/testing/testing_api_helpers_exchange.c
blob: 7fe0038ad80f457ef4bf804923f44cb01a276ac8 (plain)
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
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
/*
  This file is part of TALER
  Copyright (C) 2018-2020 Taler Systems SA

  TALER 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.

  TALER 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 TALER; see the file COPYING.  If not, see
  <http://www.gnu.org/licenses/>
*/

/**
 * @file testing/testing_api_helpers_exchange.c
 * @brief helper functions
 * @author Christian Grothoff
 * @author Marcello Stanisci
 */
#include "platform.h"
#include "taler_json_lib.h"
#include <gnunet/gnunet_curl_lib.h>
#include "taler_signatures.h"
#include "taler_extensions.h"
#include "taler_testing_lib.h"

/**
 * Run multiple taler-exchange-httpd processes in
 * parallel using GNU parallel?
 */
#define GNU_PARALLEL 0


void
TALER_TESTING_cleanup_files (const char *config_name)
{
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_parse_and_run (config_name,
                                          &TALER_TESTING_cleanup_files_cfg,
                                          NULL))
    exit (77);
}


/**
 * Remove @a option directory from @a section in @a cfg.
 *
 * @return #GNUNET_OK on success
 */
static enum GNUNET_GenericReturnValue
remove_dir (const struct GNUNET_CONFIGURATION_Handle *cfg,
            const char *section,
            const char *option)
{
  char *dir;

  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_filename (cfg,
                                               section,
                                               option,
                                               &dir))
  {
    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
                               section,
                               option);
    return GNUNET_SYSERR;
  }
  if (GNUNET_YES ==
      GNUNET_DISK_directory_test (dir,
                                  GNUNET_NO))
    GNUNET_break (GNUNET_OK ==
                  GNUNET_DISK_directory_remove (dir));
  GNUNET_free (dir);
  return GNUNET_OK;
}


enum GNUNET_GenericReturnValue
TALER_TESTING_cleanup_files_cfg (void *cls,
                                 const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  char *dir;

  (void) cls;
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_filename (cfg,
                                               "exchange-offline",
                                               "SECM_TOFU_FILE",
                                               &dir))
  {
    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
                               "exchange-offline",
                               "SECM_TOFU_FILE");
    return GNUNET_SYSERR;
  }
  if ( (0 != unlink (dir)) &&
       (ENOENT != errno) )
  {
    GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
                              "unlink",
                              dir);
    GNUNET_free (dir);
    return GNUNET_SYSERR;
  }
  GNUNET_free (dir);
  if (GNUNET_OK !=
      remove_dir (cfg,
                  "taler-exchange-secmod-eddsa",
                  "KEY_DIR"))
    return GNUNET_SYSERR;
  if (GNUNET_OK !=
      remove_dir (cfg,
                  "taler-exchange-secmod-rsa",
                  "KEY_DIR"))
    return GNUNET_SYSERR;
  return GNUNET_OK;
}


enum GNUNET_GenericReturnValue
TALER_TESTING_run_auditor_exchange (const char *config_filename,
                                    const char *exchange_master_pub,
                                    const char *exchange_base_url,
                                    int do_remove)
{
  struct GNUNET_OS_Process *proc;
  enum GNUNET_OS_ProcessStatusType type;
  unsigned long code;

  TALER_LOG_DEBUG ("Add exchange (%s,%s) to the auditor\n",
                   exchange_base_url,
                   exchange_master_pub);

  proc = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
                                  NULL, NULL, NULL,
                                  "taler-auditor-exchange",
                                  "taler-auditor-exchange",
                                  "-c", config_filename,
                                  "-u", exchange_base_url,
                                  "-m", exchange_master_pub,
                                  (GNUNET_YES == do_remove)
                                  ? "-r"
                                  : NULL,
                                  NULL);
  if (NULL == proc)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Failed to run `taler-auditor-exchange`, is your PATH correct?\n");
    return GNUNET_SYSERR;
  }
  GNUNET_assert (GNUNET_OK ==
                 GNUNET_OS_process_wait_status (proc,
                                                &type,
                                                &code));
  GNUNET_OS_process_destroy (proc);
  if ( (0 != code) ||
       (GNUNET_OS_PROCESS_EXITED != type) )
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "taler-auditor-exchange terminated with error (%d/%d)\n",
                (int) type,
                (int) code);
    return GNUNET_SYSERR;
  }
  return GNUNET_OK;
}


enum GNUNET_GenericReturnValue
TALER_TESTING_exchange_db_reset (const char *config_filename)
{
  struct GNUNET_OS_Process *proc;
  enum GNUNET_OS_ProcessStatusType type;
  unsigned long code;

  proc = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
                                  NULL, NULL, NULL,
                                  "taler-exchange-dbinit",
                                  "taler-exchange-dbinit",
                                  "-c", config_filename,
                                  "-L", "WARNING",
                                  "-r",
                                  NULL);
  if (NULL == proc)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Failed to run `taler-exchange-dbinit`, is your PATH correct?\n");
    return GNUNET_NO;
  }
  if (GNUNET_SYSERR ==
      GNUNET_OS_process_wait_status (proc,
                                     &type,
                                     &code))
  {
    GNUNET_break (0);
    GNUNET_OS_process_destroy (proc);
    return GNUNET_SYSERR;
  }
  GNUNET_OS_process_destroy (proc);
  if ( (type == GNUNET_OS_PROCESS_EXITED) &&
       (0 != code) )
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Failed to setup (exchange) database, exit code %d\n",
                (int) code);
    return GNUNET_NO;
  }
  if ( (type != GNUNET_OS_PROCESS_EXITED) ||
       (0 != code) )
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Unexpected error (%d/%d) running `taler-exchange-dbinit'!\n",
                (int) type,
                (int) code);
    return GNUNET_SYSERR;
  }
  return GNUNET_OK;
}


enum GNUNET_GenericReturnValue
TALER_TESTING_auditor_db_reset (const char *config_filename)
{
  struct GNUNET_OS_Process *proc;
  enum GNUNET_OS_ProcessStatusType type;
  unsigned long code;

  proc = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
                                  NULL, NULL, NULL,
                                  "taler-auditor-dbinit",
                                  "taler-auditor-dbinit",
                                  "-c", config_filename,
                                  "-R",
                                  NULL);
  if (NULL == proc)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Failed to run `taler-auditor-dbinit`, is your PATH correct?\n");
    return GNUNET_NO;
  }
  if (GNUNET_SYSERR ==
      GNUNET_OS_process_wait_status (proc,
                                     &type,
                                     &code))
  {
    GNUNET_break (0);
    GNUNET_OS_process_destroy (proc);
    return GNUNET_SYSERR;
  }
  GNUNET_OS_process_destroy (proc);
  if ( (type == GNUNET_OS_PROCESS_EXITED) &&
       (0 != code) )
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Failed to setup (auditor) database, exit code %d\n",
                (int) code);
    return GNUNET_NO;
  }
  if ( (type != GNUNET_OS_PROCESS_EXITED) ||
       (0 != code) )
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Unexpected error (%d/%d) running `taler-auditor-dbinit'!\n",
                (int) type,
                (int) code);
    return GNUNET_SYSERR;
  }
  return GNUNET_OK;
}


/**
 * Type of closure for
 * #sign_keys_for_exchange.
 */
struct SignInfo
{
  /**
   * Members will be set to the exchange configuration.
   */
  struct TALER_TESTING_ExchangeConfiguration *ec;

  /**
   * Name of the configuration file to use.
   */
  const char *config_filename;

  /**
   * Did we reset the database?
   */
  int db_reset;
};


/**
 * Sign the keys for an exchange given configuration @a cfg.
 * The information to be signed must be in a file "auditor.in".
 *
 * @param[in,out] cls a `struct SignInfo` with further parameters
 * @param cfg configuration to use
 * @return #GNUNET_OK on success
 */
static enum GNUNET_GenericReturnValue
sign_keys_for_exchange (void *cls,
                        const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  struct SignInfo *si = cls;
  char *exchange_master_pub;
  int ret;

  /* Load the extensions */
  if (GNUNET_OK != TALER_extensions_init (cfg))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "couldn't load extensions");
    return GNUNET_SYSERR;
  }

  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_string (cfg,
                                             "exchange",
                                             "BASE_URL",
                                             &si->ec->exchange_url))
  {
    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_WARNING,
                               "exchange",
                               "BASE_URL");
    si->ec->exchange_url = NULL;
    return GNUNET_NO;
  }
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_string (cfg,
                                             "auditor",
                                             "BASE_URL",
                                             &si->ec->auditor_url))
  {
    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_WARNING,
                               "auditor",
                               "BASE_URL");
    GNUNET_free (si->ec->exchange_url);
    si->ec->exchange_url = NULL;
    si->ec->auditor_url = NULL;
    return GNUNET_SYSERR;
  }
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_string (cfg,
                                             "exchange",
                                             "MASTER_PUBLIC_KEY",
                                             &exchange_master_pub))
  {
    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
                               "exchange",
                               "MASTER_PUBLIC_KEY");
    ret = GNUNET_SYSERR;
    goto fail;
  }
  if ( (GNUNET_OK !=
        TALER_TESTING_run_auditor_exchange (si->config_filename,
                                            exchange_master_pub,
                                            si->ec->exchange_url,
                                            GNUNET_NO)) &&
       (GNUNET_YES == si->db_reset) )
  {
    ret = GNUNET_NO;
    goto fail;
  }
  GNUNET_free (exchange_master_pub);
  return GNUNET_OK;
fail:
  GNUNET_free (si->ec->exchange_url);
  GNUNET_free (si->ec->auditor_url);
  si->ec->exchange_url = NULL;
  si->ec->auditor_url = NULL;
  return ret;
}


enum GNUNET_GenericReturnValue
TALER_TESTING_prepare_exchange (const char *config_filename,
                                int reset_db,
                                struct TALER_TESTING_ExchangeConfiguration *ec)
{
  struct SignInfo si = {
    .config_filename = config_filename,
    .ec = ec,
    .db_reset = reset_db
  };

  if (GNUNET_YES == reset_db)
  {
    if (GNUNET_OK !=
        TALER_TESTING_exchange_db_reset (config_filename))
      return GNUNET_NO;
    if (GNUNET_OK !=
        TALER_TESTING_auditor_db_reset (config_filename))
      return GNUNET_NO;
  }
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_parse_and_run (config_filename,
                                          &sign_keys_for_exchange,
                                          &si))
    return GNUNET_NO;
  return GNUNET_OK;
}


const struct TALER_EXCHANGE_DenomPublicKey *
TALER_TESTING_find_pk (const struct TALER_EXCHANGE_Keys *keys,
                       const struct TALER_Amount *amount,
                       bool age_restricted)
{
  struct GNUNET_TIME_Timestamp now;
  struct TALER_EXCHANGE_DenomPublicKey *pk;
  char *str;

  now = GNUNET_TIME_timestamp_get ();
  for (unsigned int i = 0; i<keys->num_denom_keys; i++)
  {
    pk = &keys->denom_keys[i];
    if ( (0 == TALER_amount_cmp (amount,
                                 &pk->value)) &&
         (GNUNET_TIME_timestamp_cmp (now,
                                     >=,
                                     pk->valid_from)) &&
         (GNUNET_TIME_timestamp_cmp (now,
                                     <,
                                     pk->withdraw_valid_until)) &&
         (age_restricted == (0 != pk->key.age_mask.bits)) )
      return pk;
  }
  /* do 2nd pass to check if expiration times are to blame for
   * failure */
  str = TALER_amount_to_string (amount);
  for (unsigned int i = 0; i<keys->num_denom_keys; i++)
  {
    pk = &keys->denom_keys[i];
    if ( (0 == TALER_amount_cmp (amount,
                                 &pk->value)) &&
         (GNUNET_TIME_timestamp_cmp (now,
                                     <,
                                     pk->valid_from) ||
          GNUNET_TIME_timestamp_cmp (now,
                                     >,
                                     pk->withdraw_valid_until) ) &&
         (age_restricted == (0 != pk->key.age_mask.bits)) )
    {
      GNUNET_log
        (GNUNET_ERROR_TYPE_WARNING,
        "Have denomination key for `%s', but with wrong"
        " expiration range %llu vs [%llu,%llu)\n",
        str,
        (unsigned long long) now.abs_time.abs_value_us,
        (unsigned long long) pk->valid_from.abs_time.abs_value_us,
        (unsigned long long) pk->withdraw_valid_until.abs_time.abs_value_us);
      GNUNET_free (str);
      return NULL;
    }
  }
  GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
              "No denomination key for amount %s found\n",
              str);
  GNUNET_free (str);
  return NULL;
}


int
TALER_TESTING_wait_exchange_ready (const char *base_url)
{
  char *wget_cmd;
  unsigned int iter;

  GNUNET_asprintf (&wget_cmd,
                   "wget -q -t 1 -T 1 %sseed -o /dev/null -O /dev/null",
                   base_url); // make sure ends with '/'
  /* give child time to start and bind against the socket */
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Waiting for `taler-exchange-httpd` service to be ready (check with: %s)\n",
              wget_cmd);
  iter = 0;
  do
  {
    if (10 == iter)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "Failed to launch `taler-exchange-httpd` service (or `wget')\n");
      GNUNET_free (wget_cmd);
      return 77;
    }
    sleep (1);
    iter++;
  }
  while (0 != system (wget_cmd));
  GNUNET_free (wget_cmd);
  return 0;
}


int
TALER_TESTING_wait_httpd_ready (const char *base_url)
{
  char *wget_cmd;
  unsigned int iter;

  GNUNET_asprintf (&wget_cmd,
                   "wget -q -t 1 -T 1 %s -o /dev/null -O /dev/null",
                   base_url); // make sure ends with '/'
  /* give child time to start and bind against the socket */
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Waiting for HTTP service to be ready (check with: %s)\n",
              wget_cmd);
  iter = 0;
  do
  {
    if (10 == iter)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "Failed to launch HTTP service (or `wget')\n");
      GNUNET_free (wget_cmd);
      return 77;
    }
    sleep (1);
    iter++;
  }
  while (0 != system (wget_cmd));
  GNUNET_free (wget_cmd);
  return 0;
}


/**
 * Wait for the auditor to have started. Waits for at
 * most 10s, after that returns 77 to indicate an error.
 *
 * @param base_url what URL should we expect the auditor
 *        to be running at
 * @return 0 on success
 */
int
TALER_TESTING_wait_auditor_ready (const char *base_url)
{
  char *wget_cmd;
  unsigned int iter;

  GNUNET_asprintf (&wget_cmd,
                   "wget -q -t 1 -T 1 %sversion -o /dev/null -O /dev/null",
                   base_url); // make sure ends with '/'
  /* give child time to start and bind against the socket */
  fprintf (stderr,
           "Waiting for `taler-auditor-httpd' to be ready at %s\n",
           base_url);
  iter = 0;
  do
  {
    if (10 == iter)
    {
      fprintf (stderr,
               "Failed to launch `taler-auditor-httpd' (or `wget')\n");
      GNUNET_free (wget_cmd);
      return 77;
    }
    fprintf (stderr, ".\n");
    sleep (1);
    iter++;
  }
  while (0 != system (wget_cmd));
  GNUNET_free (wget_cmd);
  return 0;
}


enum GNUNET_GenericReturnValue
TALER_TESTING_setup_with_exchange (TALER_TESTING_Main main_cb,
                                   void *main_cb_cls,
                                   const char *config_file)
{
  struct TALER_TESTING_SetupContext setup_ctx = {
    .config_filename = config_file,
    .main_cb = main_cb,
    .main_cb_cls = main_cb_cls
  };
  enum GNUNET_GenericReturnValue result;

  result =
    GNUNET_CONFIGURATION_parse_and_run (config_file,
                                        &TALER_TESTING_setup_with_exchange_cfg,
                                        &setup_ctx);
  if (GNUNET_OK != result)
    return result;
  return GNUNET_OK;
}


/**
 * Stop taler-exchange-crypto helpers.
 *
 * @param[in] helpers the process handles.
 */
static void
stop_helpers (struct GNUNET_OS_Process *helpers[3])
{
  for (unsigned int i = 0; i<3; i++)
  {
    if (NULL == helpers[i])
      continue;
    GNUNET_break (0 ==
                  GNUNET_OS_process_kill (helpers[i],
                                          SIGTERM));
    GNUNET_break (GNUNET_OK ==
                  GNUNET_OS_process_wait (helpers[i]));
    GNUNET_OS_process_destroy (helpers[i]);
  }
}


/**
 * Start taler-exchange-crypto helpers.
 *
 * @param config_filename configuration file to use
 * @param[out] helpers where to store the process handles.
 */
static enum GNUNET_GenericReturnValue
start_helpers (const char *config_filename,
               struct GNUNET_OS_Process *helpers[3])
{
  char *dir;
  const struct GNUNET_OS_ProjectData *pd;

  pd = GNUNET_OS_project_data_get ();
  GNUNET_OS_init (TALER_project_data_default ());
  dir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_BINDIR);
  GNUNET_OS_init (pd);
  if (NULL == dir)
  {
    GNUNET_break (0);
    return GNUNET_SYSERR;
  }
  {
    char *fn;

    GNUNET_asprintf (&fn,
                     "%s/%s",
                     dir,
                     "taler-exchange-secmod-eddsa");
    helpers[0] = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
                                          NULL, NULL, NULL,
                                          fn,
                                          "taler-exchange-secmod-eddsa",
                                          "-c", config_filename,
                                          "-L", "INFO",
                                          NULL);
    GNUNET_free (fn);
  }
  {
    char *fn;

    GNUNET_asprintf (&fn,
                     "%s/%s",
                     dir,
                     "taler-exchange-secmod-rsa");
    helpers[1] = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
                                          NULL, NULL, NULL,
                                          fn,
                                          "taler-exchange-secmod-rsa",
                                          "-c", config_filename,
                                          "-L", "INFO",
                                          NULL);
    GNUNET_free (fn);
  }
  {
    char *fn;

    GNUNET_asprintf (&fn,
                     "%s/%s",
                     dir,
                     "taler-exchange-secmod-cs");
    helpers[2] = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
                                          NULL, NULL, NULL,
                                          fn,
                                          "taler-exchange-secmod-cs",
                                          "-c", config_filename,
                                          "-L", "INFO",
                                          NULL);
    GNUNET_free (fn);
  }
  GNUNET_free (dir);
  if ( (NULL == helpers[0]) ||
       (NULL == helpers[1]) ||
       (NULL == helpers[2]) )
  {
    stop_helpers (helpers);
    return GNUNET_SYSERR;
  }
  return GNUNET_OK;
}


enum GNUNET_GenericReturnValue
TALER_TESTING_setup_with_exchange_cfg (
  void *cls,
  const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  const struct TALER_TESTING_SetupContext *setup_ctx = cls;
  struct GNUNET_OS_Process *exchanged;
  struct GNUNET_OS_Process *helpers[3];
  unsigned long long port;
  char *serve;
  char *base_url;
  int result;

  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_string (cfg,
                                             "exchange",
                                             "SERVE",
                                             &serve))
  {
    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
                               "exchange",
                               "SERVE");
    return GNUNET_NO;
  }

  if (0 == strcmp ("tcp",
                   serve))
  {
    if (GNUNET_OK !=
        GNUNET_CONFIGURATION_get_value_number (cfg,
                                               "exchange",
                                               "PORT",
                                               &port))
    {
      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
                                 "exchange",
                                 "PORT");
      GNUNET_free (serve);
      return GNUNET_NO;
    }

    if (GNUNET_OK !=
        GNUNET_NETWORK_test_port_free (IPPROTO_TCP,
                                       (uint16_t) port))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "Required port %llu not available, skipping.\n",
                  port);
      GNUNET_free (serve);
      return GNUNET_NO;
    }
  }
  GNUNET_free (serve);
  if (GNUNET_OK !=
      start_helpers (setup_ctx->config_filename,
                     helpers))
  {
    GNUNET_break (0);
    return 77;
  }
  exchanged = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
                                       NULL, NULL, NULL,
#if GNU_PARALLEL
                                       "parallel",
#endif
                                       "taler-exchange-httpd",
                                       "taler-exchange-httpd",
                                       "-L", "INFO",
                                       "-a", /* some tests may need timetravel */
                                       "-c", setup_ctx->config_filename,
#if GNU_PARALLEL
                                       "-r",
                                       ":::",
                                       "-",
                                       "-",
                                       "-",
                                       "-",
#endif
                                       NULL);
  if (NULL == exchanged)
  {
    GNUNET_break (0);
    stop_helpers (helpers);
    return 77;
  }
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_string (cfg,
                                             "exchange",
                                             "BASE_URL",
                                             &base_url))
  {
    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
                               "exchange",
                               "BASE_URL");
    stop_helpers (helpers);
    return GNUNET_NO;
  }

  if (0 != TALER_TESTING_wait_exchange_ready (base_url))
  {
    GNUNET_free (base_url);
    stop_helpers (helpers);
    GNUNET_break (0 ==
                  GNUNET_OS_process_kill (exchanged,
                                          SIGTERM));
#if GNU_PARALLEL
    /* GNU Parallel kills on 2nd SIGTERM, need to give it a
       chance to process the 1st signal first... */
    sleep (1);
    GNUNET_break (0 ==
                  GNUNET_OS_process_kill (exchanged,
                                          SIGTERM));
#endif
    GNUNET_break (GNUNET_OK ==
                  GNUNET_OS_process_wait (exchanged));
    GNUNET_OS_process_destroy (exchanged);
    return 77;
  }
  GNUNET_free (base_url);

  /* NOTE: this call blocks.  */
  result = TALER_TESTING_setup (setup_ctx->main_cb,
                                setup_ctx->main_cb_cls,
                                cfg,
                                exchanged,
                                GNUNET_YES);
  GNUNET_break (0 ==
                GNUNET_OS_process_kill (exchanged,
                                        SIGTERM));
#if GNU_PARALLEL
  /* GNU Parallel kills on 2nd SIGTERM, need to give it a
     chance to process the 1st signal first... */
  sleep (1);
  GNUNET_break (0 ==
                GNUNET_OS_process_kill (exchanged,
                                        SIGTERM));
#endif
  GNUNET_break (GNUNET_OK ==
                GNUNET_OS_process_wait (exchanged));
  GNUNET_OS_process_destroy (exchanged);
  stop_helpers (helpers);
  return result;
}


enum GNUNET_GenericReturnValue
TALER_TESTING_setup_with_auditor_and_exchange_cfg (
  void *cls,
  const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  const struct TALER_TESTING_SetupContext *setup_ctx = cls;
  struct GNUNET_OS_Process *auditord;
  unsigned long long port;
  char *serve;
  char *base_url;
  int result;

  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_string (cfg,
                                             "auditor",
                                             "SERVE",
                                             &serve))
  {
    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
                               "auditor",
                               "SERVE");
    return GNUNET_NO;
  }

  if (0 == strcmp ("tcp", serve))
  {
    if (GNUNET_OK !=
        GNUNET_CONFIGURATION_get_value_number (cfg,
                                               "auditor",
                                               "PORT",
                                               &port))
    {
      GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
                                 "auditor",
                                 "PORT");
      GNUNET_free (serve);
      return GNUNET_NO;
    }

    if (GNUNET_OK !=
        GNUNET_NETWORK_test_port_free (IPPROTO_TCP,
                                       (uint16_t) port))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                  "Required port %llu not available, skipping.\n",
                  port);
      GNUNET_free (serve);
      return GNUNET_NO;
    }
  }
  GNUNET_free (serve);
  auditord = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
                                      NULL, NULL, NULL,
                                      "taler-auditor-httpd",
                                      "taler-auditor-httpd",
                                      "-c", setup_ctx->config_filename,
                                      NULL);

  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_string (cfg,
                                             "auditor",
                                             "BASE_URL",
                                             &base_url))
  {
    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
                               "auditor",
                               "BASE_URL");
    return GNUNET_NO;
  }

  if (0 != TALER_TESTING_wait_auditor_ready (base_url))
  {
    GNUNET_free (base_url);
    GNUNET_break (0 ==
                  GNUNET_OS_process_kill (auditord,
                                          SIGTERM));
    GNUNET_break (GNUNET_OK ==
                  GNUNET_OS_process_wait (auditord));
    GNUNET_OS_process_destroy (auditord);
    return 77;
  }
  GNUNET_free (base_url);

  /* NOTE: this call blocks.  */
  result = TALER_TESTING_setup_with_exchange_cfg ((void *) setup_ctx,
                                                  cfg);
  GNUNET_break (0 ==
                GNUNET_OS_process_kill (auditord,
                                        SIGTERM));
  GNUNET_break (GNUNET_OK ==
                GNUNET_OS_process_wait (auditord));
  GNUNET_OS_process_destroy (auditord);
  return result;
}


enum GNUNET_GenericReturnValue
TALER_TESTING_setup_with_auditor_and_exchange (TALER_TESTING_Main main_cb,
                                               void *main_cb_cls,
                                               const char *config_file)
{
  struct TALER_TESTING_SetupContext setup_ctx = {
    .config_filename = config_file,
    .main_cb = main_cb,
    .main_cb_cls = main_cb_cls
  };

  return GNUNET_CONFIGURATION_parse_and_run (
    config_file,
    &TALER_TESTING_setup_with_auditor_and_exchange_cfg,
    &setup_ctx);
}


enum GNUNET_GenericReturnValue
TALER_TESTING_url_port_free (const char *url)
{
  const char *port;
  long pnum;

  port = strrchr (url,
                  (unsigned char) ':');
  if (NULL == port)
    pnum = 80;
  else
    pnum = strtol (port + 1, NULL, 10);
  if (GNUNET_OK !=
      GNUNET_NETWORK_test_port_free (IPPROTO_TCP,
                                     pnum))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                "Port %u not available.\n",
                (unsigned int) pnum);
    return GNUNET_SYSERR;
  }
  return GNUNET_OK;
}


/* end of testing_api_helpers_exchange.c */