summaryrefslogtreecommitdiff
path: root/src/fs/gnunet-service-fs.c
blob: fea22f279050c7c6a4fb223975428b8ed9f10733 (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
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
/*
     This file is part of GNUnet.
     Copyright (C) 2009-2014, 2016 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/>.
*/

/**
 * @file fs/gnunet-service-fs.c
 * @brief gnunet anonymity protocol implementation
 * @author Christian Grothoff
 */
#include "platform.h"
#include <float.h>
#include "gnunet_constants.h"
#include "gnunet_core_service.h"
#include "gnunet_dht_service.h"
#include "gnunet_datastore_service.h"
#include "gnunet_load_lib.h"
#include "gnunet_peer_lib.h"
#include "gnunet_protocols.h"
#include "gnunet_signatures.h"
#include "gnunet_statistics_service.h"
#include "gnunet_transport_service.h"
#include "gnunet_util_lib.h"
#include "gnunet-service-fs_cp.h"
#include "gnunet-service-fs_indexing.h"
#include "gnunet-service-fs_pe.h"
#include "gnunet-service-fs_pr.h"
#include "gnunet-service-fs_push.h"
#include "gnunet-service-fs_put.h"
#include "gnunet-service-fs_cadet.h"
#include "fs.h"
#include "fs_api.h"

/**
 * Size for the hash map for DHT requests from the FS
 * service.  Should be about the number of concurrent
 * DHT requests we plan to make.
 */
#define FS_DHT_HT_SIZE 1024


/**
 * How quickly do we age cover traffic?  At the given
 * time interval, remaining cover traffic counters are
 * decremented by 1/16th.
 */
#define COVER_AGE_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)

/**
 * Collect an instane number of statistics?  May cause excessive IPC.
 */
#define INSANE_STATISTICS GNUNET_NO



/**
 * Doubly-linked list of requests we are performing
 * on behalf of the same client.
 */
struct ClientRequest
{

  /**
   * This is a doubly-linked list.
   */
  struct ClientRequest *next;

  /**
   * This is a doubly-linked list.
   */
  struct ClientRequest *prev;

  /**
   * Request this entry represents.
   */
  struct GSF_PendingRequest *pr;

  /**
   * Client list this request belongs to.
   */
  struct GSF_LocalClient *lc;

  /**
   * Task scheduled to destroy the request.
   */
  struct GNUNET_SCHEDULER_Task * kill_task;

};


/**
 * Replies to be transmitted to the client.  The actual
 * response message is allocated after this struct.
 */
struct ClientResponse
{
  /**
   * This is a doubly-linked list.
   */
  struct ClientResponse *next;

  /**
   * This is a doubly-linked list.
   */
  struct ClientResponse *prev;

  /**
   * Client list entry this response belongs to.
   */
  struct GSF_LocalClient *lc;

  /**
   * Number of bytes in the response.
   */
  size_t msize;
};


/**
 * Information we track while handling an index
 * start request from a client.
 */
struct IndexStartContext
{

  /**
   * This is a doubly linked list.
   */
  struct IndexStartContext *next;

  /**
   * This is a doubly linked list.
   */
  struct IndexStartContext *prev;

  /**
   * Name of the indexed file.
   */
  char *filename;

  /**
   * Context for transmitting confirmation to client.
   */
  struct GSF_LocalClient *lc;

  /**
   * Context for hashing of the file.
   */
  struct GNUNET_CRYPTO_FileHashContext *fhc;

  /**
   * Hash of the contents of the file.
   */
  struct GNUNET_HashCode file_id;

};


/**
 * A local client.
 */
struct GSF_LocalClient
{

  /**
   * ID of the client.
   */
  struct GNUNET_SERVICE_Client *client;

  /**
   * Queue for sending replies.
   */
  struct GNUNET_MQ_Handle *mq;

  /**
   * Head of list of requests performed on behalf
   * of this client right now.
   */
  struct ClientRequest *cr_head;

  /**
   * Tail of list of requests performed on behalf
   * of this client right now.
   */
  struct ClientRequest *cr_tail;

  /**
   * This is a doubly linked list.
   */
  struct IndexStartContext *isc_head;

  /**
   * This is a doubly linked list.
   */
  struct IndexStartContext *isc_tail;

  /**
   * Head of linked list of responses.
   */
  struct ClientResponse *res_head;

  /**
   * Tail of linked list of responses.
   */
  struct ClientResponse *res_tail;

};


/* ****************************** globals ****************************** */

/**
 * Our connection to the datastore.
 */
struct GNUNET_DATASTORE_Handle *GSF_dsh;

/**
 * Our configuration.
 */
const struct GNUNET_CONFIGURATION_Handle *GSF_cfg;

/**
 * Handle for reporting statistics.
 */
struct GNUNET_STATISTICS_Handle *GSF_stats;

/**
 * Handle for DHT operations.
 */
struct GNUNET_DHT_Handle *GSF_dht;

/**
 * How long do requests typically stay in the routing table?
 */
struct GNUNET_LOAD_Value *GSF_rt_entry_lifetime;

/**
 * Running average of the observed latency to other peers (round trip).
 * Initialized to 5s as the initial default.
 */
struct GNUNET_TIME_Relative GSF_avg_latency = { 500 };

/**
 * Handle to ATS service.
 */
struct GNUNET_ATS_PerformanceHandle *GSF_ats;


/**
 * Typical priorities we're seeing from other peers right now.  Since
 * most priorities will be zero, this value is the weighted average of
 * non-zero priorities seen "recently".  In order to ensure that new
 * values do not dramatically change the ratio, values are first
 * "capped" to a reasonable range (+N of the current value) and then
 * averaged into the existing value by a ratio of 1:N.  Hence
 * receiving the largest possible priority can still only raise our
 * "current_priorities" by at most 1.
 */
double GSF_current_priorities;

/**
 * Size of the datastore queue we assume for common requests.
 */
unsigned int GSF_datastore_queue_size;

/**
 * How many query messages have we received 'recently' that
 * have not yet been claimed as cover traffic?
 */
unsigned int GSF_cover_query_count;

/**
 * How many content messages have we received 'recently' that
 * have not yet been claimed as cover traffic?
 */
unsigned int GSF_cover_content_count;

/**
 * Our block context.
 */
struct GNUNET_BLOCK_Context *GSF_block_ctx;

/**
 * Pointer to handle to the core service (points to NULL until we've
 * connected to it).
 */
struct GNUNET_CORE_Handle *GSF_core;

/**
 * Are we introducing randomized delays for better anonymity?
 */
int GSF_enable_randomized_delays;

/**
 * Identity of this peer.
 */
struct GNUNET_PeerIdentity GSF_my_id;

/* ***************************** locals ******************************* */

/**
 * Configuration for block library.
 */
static struct GNUNET_CONFIGURATION_Handle *block_cfg;

/**
 * Private key of this peer.  Used to sign LOC URI requests.
 */
static struct GNUNET_CRYPTO_EddsaPrivateKey *pk;

/**
 * ID of our task that we use to age the cover counters.
 */
static struct GNUNET_SCHEDULER_Task * cover_age_task;

/**
 * Datastore 'GET' load tracking.
 */
static struct GNUNET_LOAD_Value *datastore_get_load;


/**
 * Creates a fresh local client handle.
 *
 * @param cls NULL
 * @param client handle of the client
 * @param mq message queue for @a client
 * @return handle to local client entry
 */
static void *
client_connect_cb (void *cls,
                   struct GNUNET_SERVICE_Client *client,
                   struct GNUNET_MQ_Handle *mq)
{
  struct GSF_LocalClient *pos;

  pos = GNUNET_new (struct GSF_LocalClient);
  pos->client = client;
  pos->mq = mq;
  return pos;
}


/**
 * Free the given client request.
 *
 * @param cls the client request to free
 */
static void
client_request_destroy (void *cls)
{
  struct ClientRequest *cr = cls;
  struct GSF_LocalClient *lc = cr->lc;

  cr->kill_task = NULL;
  GNUNET_CONTAINER_DLL_remove (lc->cr_head,
                               lc->cr_tail,
                               cr);
  GSF_pending_request_cancel_ (cr->pr,
                               GNUNET_YES);
  GNUNET_STATISTICS_update (GSF_stats,
                            gettext_noop ("# client searches active"),
                            -1,
                            GNUNET_NO);
  GNUNET_free (cr);
}


/**
 * Handle a reply to a pending request.  Also called if a request
 * expires (then with data == NULL).  The handler may be called
 * many times (depending on the request type), but will not be
 * called during or after a call to #GSF_pending_request_cancel()
 * and will also not be called anymore after a call signalling
 * expiration.
 *
 * @param cls user-specified closure
 * @param eval evaluation of the result
 * @param pr handle to the original pending request
 * @param reply_anonymity_level anonymity level for the reply, UINT32_MAX for "unknown"
 * @param expiration when does @a data expire?
 * @param last_transmission when was the last time we've tried to download this block? (FOREVER if unknown)
 * @param type type of the block
 * @param data response data, NULL on request expiration
 * @param data_len number of bytes in @a data
 */
static void
client_response_handler (void *cls,
                         enum GNUNET_BLOCK_EvaluationResult eval,
                         struct GSF_PendingRequest *pr,
                         uint32_t reply_anonymity_level,
                         struct GNUNET_TIME_Absolute expiration,
                         struct GNUNET_TIME_Absolute last_transmission,
                         enum GNUNET_BLOCK_Type type,
                         const void *data,
                         size_t data_len)
{
  struct ClientRequest *cr = cls;
  struct GSF_LocalClient *lc;
  struct GNUNET_MQ_Envelope *env;
  struct ClientPutMessage *pm;
  const struct GSF_PendingRequestData *prd;

  if (NULL == data)
  {
    /* local-only request, with no result, clean up. */
    if (NULL == cr->kill_task)
      cr->kill_task = GNUNET_SCHEDULER_add_now (&client_request_destroy,
                                                cr);
    return;
  }
  prd = GSF_pending_request_get_data_ (pr);
  GNUNET_break (type != GNUNET_BLOCK_TYPE_ANY);
  if ((prd->type != type) && (prd->type != GNUNET_BLOCK_TYPE_ANY))
  {
    GNUNET_break (0);
    return;
  }
  GNUNET_STATISTICS_update (GSF_stats,
                            gettext_noop
                            ("# replies received for local clients"), 1,
                            GNUNET_NO);
  GNUNET_assert (pr == cr->pr);
  lc = cr->lc;
  env = GNUNET_MQ_msg_extra (pm,
                             data_len,
                             GNUNET_MESSAGE_TYPE_FS_PUT);
  pm->type = htonl (type);
  pm->expiration = GNUNET_TIME_absolute_hton (expiration);
  pm->last_transmission = GNUNET_TIME_absolute_hton (last_transmission);
  pm->num_transmissions = htonl (prd->num_transmissions);
  pm->respect_offered = htonl (prd->respect_offered);
  GNUNET_memcpy (&pm[1],
                 data,
                 data_len);
  GNUNET_MQ_send (lc->mq,
                  env);
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Queued reply to query `%s' for local client\n",
              GNUNET_h2s (&prd->query));
  if (GNUNET_BLOCK_EVALUATION_OK_LAST != eval)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
		"Evaluation %d - keeping query alive\n",
		(int) eval);
    return;
  }
  if (NULL == cr->kill_task)
    cr->kill_task = GNUNET_SCHEDULER_add_now (&client_request_destroy,
                                              cr);
}


/**
 * A client disconnected from us.  Tear down the local client
 * record.
 *
 * @param cls unused
 * @param client handle of the client
 * @param app_ctx the `struct GSF_LocalClient`
 */
static void
client_disconnect_cb (void *cls,
                      struct GNUNET_SERVICE_Client *client,
                      void *app_ctx)
{
  struct GSF_LocalClient *lc = app_ctx;
  struct IndexStartContext *isc;
  struct ClientRequest *cr;
  struct ClientResponse *res;

  while (NULL != (cr = lc->cr_head))
  {
    if (NULL != cr->kill_task)
      GNUNET_SCHEDULER_cancel (cr->kill_task);
    client_request_destroy (cr);
  }
  while (NULL != (res = lc->res_head))
  {
    GNUNET_CONTAINER_DLL_remove (lc->res_head,
                                 lc->res_tail,
                                 res);
    GNUNET_free (res);
  }
  while (NULL != (isc = lc->isc_head))
  {
    GNUNET_CONTAINER_DLL_remove (lc->isc_head,
                                 lc->isc_tail,
                                 isc);
    GNUNET_CRYPTO_hash_file_cancel (isc->fhc);
    GNUNET_free (isc);
  }
  GNUNET_free (lc);
}





/**
 * Task that periodically ages our cover traffic statistics.
 *
 * @param cls unused closure
 */
static void
age_cover_counters (void *cls)
{
  GSF_cover_content_count = (GSF_cover_content_count * 15) / 16;
  GSF_cover_query_count = (GSF_cover_query_count * 15) / 16;
  cover_age_task =
      GNUNET_SCHEDULER_add_delayed (COVER_AGE_FREQUENCY,
				    &age_cover_counters,
                                    NULL);
}


/**
 * We've just now completed a datastore request.  Update our
 * datastore load calculations.
 *
 * @param start time when the datastore request was issued
 */
void
GSF_update_datastore_delay_ (struct GNUNET_TIME_Absolute start)
{
  struct GNUNET_TIME_Relative delay;

  delay = GNUNET_TIME_absolute_get_duration (start);
  GNUNET_LOAD_update (datastore_get_load, delay.rel_value_us);
}


/**
 * Test if the DATABASE (GET) load on this peer is too high
 * to even consider processing the query at
 * all.
 *
 * @param priority priority of the request (used as a reference point to compare with the load)
 * @return #GNUNET_YES if the load is too high to do anything (load high)
 *         #GNUNET_NO to process normally (load normal)
 *         #GNUNET_SYSERR to process for free (load low)
 */
int
GSF_test_get_load_too_high_ (uint32_t priority)
{
  double ld;

  ld = GNUNET_LOAD_get_load (datastore_get_load);
  if (ld < 1)
    return GNUNET_SYSERR;
  if (ld <= priority)
    return GNUNET_NO;
  return GNUNET_YES;
}


/**
 * We've received peer performance information. Update
 * our running average for the P2P latency.
 *
 * @param cls closure
 * @param address the address
 * @param active is this address in active use
 * @param bandwidth_out assigned outbound bandwidth for the connection
 * @param bandwidth_in assigned inbound bandwidth for the connection
 * @param prop performance data for the address (as far as known)
 */
static void
update_latencies (void *cls,
		  const struct GNUNET_HELLO_Address *address,
		  int active,
		  struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
		  struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
		  const struct GNUNET_ATS_Properties *prop)
{
  if (NULL == address)
  {
    /* ATS service temporarily disconnected */
    return;
  }

  if (GNUNET_YES != active)
    return;
  GSF_update_peer_latency_ (&address->peer,
                            prop->delay);
  GSF_avg_latency.rel_value_us =
    (GSF_avg_latency.rel_value_us * 31 +
     GNUNET_MIN (5000, prop->delay.rel_value_us)) / 32;
  GNUNET_STATISTICS_set (GSF_stats,
                         gettext_noop ("# running average P2P latency (ms)"),
                         GSF_avg_latency.rel_value_us / 1000LL,
                         GNUNET_NO);
}


/**
 * Check P2P "PUT" message.
 *
 * @param cls closure with the `struct GSF_ConnectedPeer`
 * @param message the actual message
 * @return #GNUNET_OK to keep the connection open,
 *         #GNUNET_SYSERR to close it (signal serious error)
 */
static int
check_p2p_put (void *cls,
	       const struct PutMessage *put)
{
  enum GNUNET_BLOCK_Type type;

  type = ntohl (put->type);
  if (GNUNET_BLOCK_TYPE_FS_ONDEMAND == type)
  {
    GNUNET_break_op (0);
    return GNUNET_SYSERR;
  }
  return GNUNET_OK;
}


/**
 * We have a new request, consider forwarding it to the given
 * peer.
 *
 * @param cls the `struct GSF_PendingRequest`
 * @param peer identity of the peer
 * @param cp handle to the connected peer record
 * @param ppd peer performance data
 */
static void
consider_request_for_forwarding (void *cls,
                                 const struct GNUNET_PeerIdentity *peer,
                                 struct GSF_ConnectedPeer *cp,
                                 const struct GSF_PeerPerformanceData *ppd)
{
  struct GSF_PendingRequest *pr = cls;

  if (GNUNET_YES !=
      GSF_pending_request_test_target_ (pr, peer))
  {
#if INSANE_STATISTICS
    GNUNET_STATISTICS_update (GSF_stats,
                              gettext_noop ("# Loopback routes suppressed"), 1,
                              GNUNET_NO);
#endif
    return;
  }
  GSF_plan_add_ (cp,
		 pr);
}


/**
 * Function to be called after we're done processing
 * replies from the local lookup.  If the result status
 * code indicates that there may be more replies, plan
 * forwarding the request.
 *
 * @param cls closure (NULL)
 * @param pr the pending request we were processing
 * @param result final datastore lookup result
 */
void
GSF_consider_forwarding (void *cls,
			 struct GSF_PendingRequest *pr,
			 enum GNUNET_BLOCK_EvaluationResult result)
{
  if (GNUNET_BLOCK_EVALUATION_OK_LAST == result)
    return;                     /* we're done... */
  if (GNUNET_YES !=
      GSF_pending_request_test_active_ (pr))
    return; /* request is not actually active, skip! */
  GSF_iterate_connected_peers_ (&consider_request_for_forwarding,
                                pr);
}


/**
 * Check P2P "GET" request.
 *
 * @param cls closure
 * @param gm the actual message
 * @return #GNUNET_OK to keep the connection open,
 *         #GNUNET_SYSERR to close it (signal serious error)
 */
static int
check_p2p_get (void *cls,
	       const struct GetMessage *gm)
{
  size_t msize;
  unsigned int bm;
  unsigned int bits;
  size_t bfsize;

  msize = ntohs (gm->header.size);
  bm = ntohl (gm->hash_bitmap);
  bits = 0;
  while (bm > 0)
  {
    if (1 == (bm & 1))
      bits++;
    bm >>= 1;
  }
  if (msize < sizeof (struct GetMessage) + bits * sizeof (struct GNUNET_PeerIdentity))
  {
    GNUNET_break_op (0);
    return GNUNET_SYSERR;
  }
  bfsize = msize - sizeof (struct GetMessage) - bits * sizeof (struct GNUNET_PeerIdentity);
  /* bfsize must be power of 2, check! */
  if (0 != ((bfsize - 1) & bfsize))
  {
    GNUNET_break_op (0);
    return GNUNET_SYSERR;
  }
  return GNUNET_OK;
}


/**
 * We're done with the local lookup, now consider
 * P2P processing (depending on request options and
 * result status).  Also signal that we can now
 * receive more request information from the client.
 *
 * @param cls the client doing the request (`struct GSF_LocalClient`)
 * @param pr the pending request we were processing
 * @param result final datastore lookup result
 */
static void
start_p2p_processing (void *cls,
                      struct GSF_PendingRequest *pr,
                      enum GNUNET_BLOCK_EvaluationResult result)
{
  struct GSF_LocalClient *lc = cls;
  struct GSF_PendingRequestData *prd;

  GNUNET_SERVICE_client_continue (lc->client);
  if (GNUNET_BLOCK_EVALUATION_OK_LAST == result)
    return;                     /* we're done, 'pr' was already destroyed... */
  prd = GSF_pending_request_get_data_ (pr);
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Finished database lookup for local request `%s' with result %d\n",
              GNUNET_h2s (&prd->query),
	      result);
  if (0 == prd->anonymity_level)
  {
    switch (prd->type)
    {
    case GNUNET_BLOCK_TYPE_FS_DBLOCK:
    case GNUNET_BLOCK_TYPE_FS_IBLOCK:
      /* the above block types MAY be available via 'cadet' */
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
		  "Considering cadet-based download for block\n");
      GSF_cadet_lookup_ (pr);
      break;
    case GNUNET_BLOCK_TYPE_FS_UBLOCK:
      /* the above block types are in the DHT */
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
		  "Considering DHT-based search for block\n");
      GSF_dht_lookup_ (pr);
      break;
    default:
      GNUNET_break (0);
      break;
    }
  }
  GSF_consider_forwarding (NULL,
                           pr,
                           result);
}


/**
 * Check #GNUNET_MESSAGE_TYPE_FS_START_SEARCH-message (search request
 * from client).
 *
 * @param cls identification of the client
 * @param sm the actual message
 * @return #GNUNET_OK if @a sm is well-formed
 */
static int
check_client_start_search (void *cls,
                           const struct SearchMessage *sm)
{
  uint16_t msize;

  msize = ntohs (sm->header.size) - sizeof (struct SearchMessage);
  if (0 != msize % sizeof (struct GNUNET_HashCode))
  {
    GNUNET_break (0);
    return GNUNET_SYSERR;
  }
  return GNUNET_OK;
}


/**
 * Handle #GNUNET_MESSAGE_TYPE_FS_START_SEARCH-message (search request
 * from client).
 *
 * Responsible for creating the request entry itself and setting
 * up reply callback and cancellation on client disconnect.
 *
 * @param cls identification of the client
 * @param sm the actual message
 */
static void
handle_client_start_search (void *cls,
                            const struct SearchMessage *sm)
{
  static struct GNUNET_PeerIdentity all_zeros;
  struct GSF_LocalClient *lc = cls;
  struct ClientRequest *cr;
  struct GSF_PendingRequestData *prd;
  uint16_t msize;
  unsigned int sc;
  enum GNUNET_BLOCK_Type type;
  enum GSF_PendingRequestOptions options;

  GNUNET_STATISTICS_update (GSF_stats,
                            gettext_noop ("# client searches received"),
                            1,
                            GNUNET_NO);
  msize = ntohs (sm->header.size) - sizeof (struct SearchMessage);
  sc = msize / sizeof (struct GNUNET_HashCode);
  type = ntohl (sm->type);
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Received request for `%s' of type %u from local client\n",
              GNUNET_h2s (&sm->query),
              (unsigned int) type);
  cr = NULL;
  /* detect duplicate UBLOCK requests */
  if ((type == GNUNET_BLOCK_TYPE_FS_UBLOCK) ||
      (type == GNUNET_BLOCK_TYPE_ANY))
  {
    cr = lc->cr_head;
    while (NULL != cr)
    {
      prd = GSF_pending_request_get_data_ (cr->pr);
      /* only unify with queries that hae not yet started local processing
	 (SEARCH_MESSAGE_OPTION_CONTINUED was always set) and that have a
	 matching query and type */
      if ((GNUNET_YES != prd->has_started) &&
	  (0 != memcmp (&prd->query,
                        &sm->query,
                        sizeof (struct GNUNET_HashCode))) &&
          (prd->type == type))
        break;
      cr = cr->next;
    }
  }
  if (NULL != cr)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Have existing request, merging content-seen lists.\n");
    GSF_pending_request_update_ (cr->pr,
                                 (const struct GNUNET_HashCode *) &sm[1],
                                 sc);
    GNUNET_STATISTICS_update (GSF_stats,
                              gettext_noop ("# client searches updated (merged content seen list)"),
                              1,
                              GNUNET_NO);
  }
  else
  {
    GNUNET_STATISTICS_update (GSF_stats,
                              gettext_noop ("# client searches active"),
                              1,
                              GNUNET_NO);
    cr = GNUNET_new (struct ClientRequest);
    cr->lc = lc;
    GNUNET_CONTAINER_DLL_insert (lc->cr_head,
                                 lc->cr_tail,
                                 cr);
    options = GSF_PRO_LOCAL_REQUEST;
    if (0 != (SEARCH_MESSAGE_OPTION_LOOPBACK_ONLY & ntohl (sm->options)))
      options |= GSF_PRO_LOCAL_ONLY;
    cr->pr = GSF_pending_request_create_ (options, type,
					  &sm->query,
                                          (0 !=
                                           memcmp (&sm->target,
                                                   &all_zeros,
                                                   sizeof (struct GNUNET_PeerIdentity)))
                                          ? &sm->target : NULL, NULL, 0,
                                          0 /* bf */ ,
                                          ntohl (sm->anonymity_level),
                                          0 /* priority */ ,
                                          0 /* ttl */ ,
                                          0 /* sender PID */ ,
                                          0 /* origin PID */ ,
                                          (const struct GNUNET_HashCode *) &sm[1], sc,
                                          &client_response_handler,
                                          cr);
  }
  if (0 != (SEARCH_MESSAGE_OPTION_CONTINUED & ntohl (sm->options)))
  {
    GNUNET_SERVICE_client_continue (lc->client);
    return;
  }
  GSF_pending_request_get_data_ (cr->pr)->has_started = GNUNET_YES;
  GSF_local_lookup_ (cr->pr,
                     &start_p2p_processing,
                     lc);
}


/**
 * Handle request to sign a LOC URI (from client).
 *
 * @param cls identification of the client
 * @param msg the actual message
 */
static void
handle_client_loc_sign (void *cls,
                        const struct RequestLocSignatureMessage *msg)
{
  struct GSF_LocalClient *lc = cls;
  struct GNUNET_FS_Uri base;
  struct GNUNET_FS_Uri *loc;
  struct GNUNET_MQ_Envelope *env;
  struct ResponseLocSignatureMessage *resp;

  GNUNET_break (GNUNET_SIGNATURE_PURPOSE_PEER_PLACEMENT ==
                ntohl (msg->purpose));
  base.type = GNUNET_FS_URI_CHK;
  base.data.chk.chk = msg->chk;
  base.data.chk.file_length = GNUNET_ntohll (msg->file_length);
  loc = GNUNET_FS_uri_loc_create (&base,
                                  pk,
                                  GNUNET_TIME_absolute_ntoh (msg->expiration_time));
  env = GNUNET_MQ_msg (resp,
                       GNUNET_MESSAGE_TYPE_FS_REQUEST_LOC_SIGNATURE);
  resp->purpose = htonl (GNUNET_SIGNATURE_PURPOSE_PEER_PLACEMENT);
  resp->expiration_time = GNUNET_TIME_absolute_hton (loc->data.loc.expirationTime);
  resp->signature = loc->data.loc.contentSignature;
  resp->peer = loc->data.loc.peer;
  GNUNET_FS_uri_destroy (loc);
  GNUNET_MQ_send (lc->mq,
                  env);
  GNUNET_SERVICE_client_continue (lc->client);
}


/**
 * Check INDEX_START-message.
 *
 * @param cls identification of the client
 * @param ism the actual message
 * @return #GNUNET_OK if @a ism is well-formed
 */
static int
check_client_index_start (void *cls,
                          const struct IndexStartMessage *ism)
{
  uint16_t msize;
  char *fn;

  msize = ntohs (ism->header.size);
  if (((const char *) ism)[msize - 1] != '\0')
  {
    GNUNET_break (0);
    return GNUNET_SYSERR;
  }
  if (0 != ism->reserved)
  {
    GNUNET_break (0);
    return GNUNET_SYSERR;
  }
  fn = GNUNET_STRINGS_filename_expand ((const char *) &ism[1]);
  if (NULL == fn)
  {
    GNUNET_break (0);
    return GNUNET_SYSERR;
  }
  GNUNET_free (fn);
  return GNUNET_OK;
}


/**
 * We've validated the hash of the file we're about to index.  Signal
 * success to the client and update our internal data structures.
 *
 * @param isc the data about the index info entry for the request
 */
static void
signal_index_ok (struct IndexStartContext *isc)
{
  struct GSF_LocalClient *lc = isc->lc;
  struct GNUNET_MQ_Envelope *env;
  struct GNUNET_MessageHeader *msg;

  GNUNET_FS_add_to_index (isc->filename,
                          &isc->file_id);
  env = GNUNET_MQ_msg (msg,
                       GNUNET_MESSAGE_TYPE_FS_INDEX_START_OK);
  GNUNET_MQ_send (lc->mq,
                  env);
  GNUNET_free (isc->filename);
  GNUNET_free (isc);
  GNUNET_SERVICE_client_continue (lc->client);
}


/**
 * Function called once the hash computation over an
 * indexed file has completed.
 *
 * @param cls closure, our publishing context
 * @param res resulting hash, NULL on error
 */
static void
hash_for_index_val (void *cls,
                    const struct GNUNET_HashCode *res)
{
  struct IndexStartContext *isc = cls;
  struct GSF_LocalClient *lc = isc->lc;
  struct GNUNET_MQ_Envelope *env;
  struct GNUNET_MessageHeader *msg;

  GNUNET_CONTAINER_DLL_remove (lc->isc_head,
                               lc->isc_tail,
                               isc);
  isc->fhc = NULL;
  if ( (NULL == res) ||
       (0 != memcmp (res,
                     &isc->file_id,
                     sizeof (struct GNUNET_HashCode))))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                _("Hash mismatch trying to index file `%s' which does not have hash `%s'\n"),
                isc->filename,
                GNUNET_h2s (&isc->file_id));
    env = GNUNET_MQ_msg (msg,
                         GNUNET_MESSAGE_TYPE_FS_INDEX_START_FAILED);
    GNUNET_MQ_send (lc->mq,
                    env);
    GNUNET_SERVICE_client_continue (lc->client);
    GNUNET_free (isc);
    return;
  }
  signal_index_ok (isc);
}


/**
 * Handle INDEX_START-message.
 *
 * @param cls identification of the client
 * @param message the actual message
 */
static void
handle_client_index_start (void *cls,
                           const struct IndexStartMessage *ism)
{
  struct GSF_LocalClient *lc = cls;
  struct IndexStartContext *isc;
  char *fn;
  uint64_t dev;
  uint64_t ino;
  uint64_t mydev;
  uint64_t myino;

  fn = GNUNET_STRINGS_filename_expand ((const char *) &ism[1]);
  GNUNET_assert (NULL != fn);
  dev = GNUNET_ntohll (ism->device);
  ino = GNUNET_ntohll (ism->inode);
  isc = GNUNET_new (struct IndexStartContext);
  isc->filename = fn;
  isc->file_id = ism->file_id;
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Received START_INDEX message for file `%s'\n",
              isc->filename);
  isc->lc = lc;
  mydev = 0;
  myino = 0;
  if ( ( (dev != 0) ||
         (ino != 0) ) &&
       (GNUNET_OK == GNUNET_DISK_file_get_identifiers (fn,
                                                       &mydev,
                                                       &myino)) &&
       (dev == mydev) &&
       (ino == myino) )
  {
    /* fast validation OK! */
    signal_index_ok (isc);
    return;
  }
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Mismatch in file identifiers (%llu != %llu or %u != %u), need to hash.\n",
              (unsigned long long) ino,
              (unsigned long long) myino,
              (unsigned int) dev,
              (unsigned int) mydev);
  /* slow validation, need to hash full file (again) */
  GNUNET_CONTAINER_DLL_insert (lc->isc_head,
                               lc->isc_tail,
                               isc);
  isc->fhc = GNUNET_CRYPTO_hash_file (GNUNET_SCHEDULER_PRIORITY_IDLE,
                                      isc->filename,
                                      HASHING_BLOCKSIZE,
                                      &hash_for_index_val,
                                      isc);
  if (NULL == isc->fhc)
    hash_for_index_val (isc,
                        NULL);
}


/**
 * Handle INDEX_LIST_GET-message.
 *
 * @param cls closure
 * @param message the actual message
 */
static void
handle_client_index_list_get (void *cls,
                              const struct GNUNET_MessageHeader *message)
{
  struct GSF_LocalClient *lc = cls;

  GNUNET_FS_indexing_send_list (lc->mq);
  GNUNET_SERVICE_client_continue (lc->client);
}


/**
 * Handle UNINDEX-message.
 *
 * @param cls identification of the client
 * @param message the actual message
 */
static void
handle_client_unindex (void *cls,
                       const struct UnindexMessage *um)
{
  struct GSF_LocalClient *lc = cls;
  struct GNUNET_MQ_Envelope *env;
  struct GNUNET_MessageHeader *msg;
  int found;

  GNUNET_break (0 == um->reserved);
  found = GNUNET_FS_indexing_do_unindex (&um->file_id);
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Client requested unindexing of file `%s': %s\n",
              GNUNET_h2s (&um->file_id),
              found ? "found" : "not found");
  env = GNUNET_MQ_msg (msg,
                       GNUNET_MESSAGE_TYPE_FS_UNINDEX_OK);
  GNUNET_MQ_send (lc->mq,
                  env);
  GNUNET_SERVICE_client_continue (lc->client);
}


/**
 * Task run during shutdown.
 *
 * @param cls unused
 */
static void
shutdown_task (void *cls)
{
  GSF_cadet_stop_server ();
  if (NULL != GSF_core)
  {
    GNUNET_CORE_disconnect (GSF_core);
    GSF_core = NULL;
  }
  if (NULL != GSF_ats)
  {
    GNUNET_ATS_performance_done (GSF_ats);
    GSF_ats = NULL;
  }
  GSF_put_done_ ();
  GSF_push_done_ ();
  GSF_pending_request_done_ ();
  GSF_plan_done ();
  GSF_connected_peer_done_ ();
  GNUNET_DATASTORE_disconnect (GSF_dsh,
                               GNUNET_NO);
  GSF_dsh = NULL;
  GNUNET_DHT_disconnect (GSF_dht);
  GSF_dht = NULL;
  GNUNET_BLOCK_context_destroy (GSF_block_ctx);
  GSF_block_ctx = NULL;
  GNUNET_CONFIGURATION_destroy (block_cfg);
  block_cfg = NULL;
  GNUNET_STATISTICS_destroy (GSF_stats, GNUNET_NO);
  GSF_stats = NULL;
  if (NULL != cover_age_task)
  {
    GNUNET_SCHEDULER_cancel (cover_age_task);
    cover_age_task = NULL;
  }
  GNUNET_FS_indexing_done ();
  GNUNET_LOAD_value_free (datastore_get_load);
  datastore_get_load = NULL;
  GNUNET_LOAD_value_free (GSF_rt_entry_lifetime);
  GSF_rt_entry_lifetime = NULL;
}


/**
 * Function called after GNUNET_CORE_connect has succeeded
 * (or failed for good).  Note that the private key of the
 * peer is intentionally not exposed here; if you need it,
 * your process should try to read the private key file
 * directly (which should work if you are authorized...).
 *
 * @param cls closure
 * @param my_identity ID of this peer, NULL if we failed
 */
static void
peer_init_handler (void *cls,
                   const struct GNUNET_PeerIdentity *my_identity)
{
  if (0 != GNUNET_CRYPTO_cmp_peer_identity (&GSF_my_id,
                                            my_identity))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Peer identity mismatch, refusing to start!\n");
    GNUNET_SCHEDULER_shutdown ();
  }
}


/**
 * Process fs requests.
 *
 * @param c configuration to use
 */
static int
main_init (const struct GNUNET_CONFIGURATION_Handle *c)
{
  struct GNUNET_MQ_MessageHandler no_p2p_handlers[] = {
    GNUNET_MQ_handler_end ()
  };
  struct GNUNET_MQ_MessageHandler p2p_handlers[] = {
    GNUNET_MQ_hd_var_size (p2p_get,
                           GNUNET_MESSAGE_TYPE_FS_GET,
                           struct GetMessage,
                           NULL),
    GNUNET_MQ_hd_var_size (p2p_put,
                           GNUNET_MESSAGE_TYPE_FS_PUT,
                           struct PutMessage,
                           NULL),
    GNUNET_MQ_hd_fixed_size (p2p_migration_stop,
                             GNUNET_MESSAGE_TYPE_FS_MIGRATION_STOP,
                             struct MigrationStopMessage,
                             NULL),
    GNUNET_MQ_handler_end ()
  };
  int anon_p2p_off;
  char *keyfile;

  /* this option is really only for testcases that need to disable
     _anonymous_ file-sharing for some reason */
  anon_p2p_off = (GNUNET_YES ==
		  GNUNET_CONFIGURATION_get_value_yesno (GSF_cfg,
							"fs",
							"DISABLE_ANON_TRANSFER"));

  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_filename (GSF_cfg,
                                               "PEER",
                                               "PRIVATE_KEY",
                                               &keyfile))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                _("FS service is lacking HOSTKEY configuration setting.  Exiting.\n"));
    GNUNET_SCHEDULER_shutdown ();
    return GNUNET_SYSERR;
  }
  pk = GNUNET_CRYPTO_eddsa_key_create_from_file (keyfile);
  GNUNET_free (keyfile);
  GNUNET_assert (NULL != pk);
  GNUNET_CRYPTO_eddsa_key_get_public (pk,
                                      &GSF_my_id.public_key);

  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "I am peer %s\n",
              GNUNET_i2s (&GSF_my_id));
  GSF_core
    = GNUNET_CORE_connect (GSF_cfg,
			   NULL,
                           &peer_init_handler,
                           &GSF_peer_connect_handler,
                           &GSF_peer_disconnect_handler,
			   (GNUNET_YES == anon_p2p_off)
			   ? no_p2p_handlers
			   : p2p_handlers);
  if (NULL == GSF_core)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                _("Failed to connect to `%s' service.\n"),
		"core");
    return GNUNET_SYSERR;
  }
  cover_age_task =
      GNUNET_SCHEDULER_add_delayed (COVER_AGE_FREQUENCY,
				    &age_cover_counters,
                                    NULL);
  datastore_get_load = GNUNET_LOAD_value_init (DATASTORE_LOAD_AUTODECLINE);
  GSF_cadet_start_server ();
  GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
				 NULL);
  return GNUNET_OK;
}


/**
 * Process fs requests.
 *
 * @param cls closure
 * @param cfg configuration to use
 * @param service the initialized service
 */
static void
run (void *cls,
     const struct GNUNET_CONFIGURATION_Handle *cfg,
     struct GNUNET_SERVICE_Handle *service)
{
  unsigned long long dqs;

  GSF_cfg = cfg;
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_size (GSF_cfg,
                                           "fs",
                                           "DATASTORE_QUEUE_SIZE",
                                           &dqs))
  {
    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_INFO,
			       "fs",
                               "DATASTORE_QUEUE_SIZE");
    dqs = 32;
  }
  GSF_datastore_queue_size = (unsigned int) dqs;
  GSF_enable_randomized_delays =
      GNUNET_CONFIGURATION_get_value_yesno (cfg, "fs", "DELAY");
  GSF_dsh = GNUNET_DATASTORE_connect (cfg);
  if (NULL == GSF_dsh)
  {
    GNUNET_SCHEDULER_shutdown ();
    return;
  }
  GSF_rt_entry_lifetime = GNUNET_LOAD_value_init (GNUNET_TIME_UNIT_FOREVER_REL);
  GSF_stats = GNUNET_STATISTICS_create ("fs", cfg);
  block_cfg = GNUNET_CONFIGURATION_create ();
  GSF_block_ctx = GNUNET_BLOCK_context_create (block_cfg);
  GNUNET_assert (NULL != GSF_block_ctx);
  GSF_dht = GNUNET_DHT_connect (cfg, FS_DHT_HT_SIZE);
  GSF_plan_init ();
  GSF_pending_request_init_ ();
  GSF_connected_peer_init_ ();
  GSF_ats = GNUNET_ATS_performance_init (GSF_cfg,
                                         &update_latencies,
                                         NULL);
  GSF_push_init_ ();
  GSF_put_init_ ();
  if ( (GNUNET_OK != GNUNET_FS_indexing_init (cfg,
                                              GSF_dsh)) ||
       (GNUNET_OK != main_init (cfg)) )
  {
    GNUNET_SCHEDULER_shutdown ();
    shutdown_task (NULL);
    return;
  }
}


/**
 * Define "main" method using service macro.
 */
GNUNET_SERVICE_MAIN
("fs",
 GNUNET_SERVICE_OPTION_NONE,
 &run,
 &client_connect_cb,
 &client_disconnect_cb,
 NULL,
 GNUNET_MQ_hd_var_size (client_index_start,
                        GNUNET_MESSAGE_TYPE_FS_INDEX_START,
                        struct IndexStartMessage,
                        NULL),
 GNUNET_MQ_hd_fixed_size (client_index_list_get,
			  GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_GET,
			  struct GNUNET_MessageHeader,
			  NULL),
 GNUNET_MQ_hd_fixed_size (client_unindex,
			  GNUNET_MESSAGE_TYPE_FS_UNINDEX,
			  struct UnindexMessage,
			  NULL),
 GNUNET_MQ_hd_var_size (client_start_search,
                        GNUNET_MESSAGE_TYPE_FS_START_SEARCH,
                        struct SearchMessage,
                        NULL),
 GNUNET_MQ_hd_fixed_size (client_loc_sign,
			  GNUNET_MESSAGE_TYPE_FS_REQUEST_LOC_SIGN,
			  struct RequestLocSignatureMessage,
			  NULL),
 GNUNET_MQ_handler_end ());


/* end of gnunet-service-fs.c */