GNUnet 0.21.2
gnunet-service-nse.c
Go to the documentation of this file.
1/*
2 This file is part of GNUnet.
3 Copyright (C) 2009, 2010, 2011, 2012, 2013, 2016 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20
38#include "platform.h"
39#include <math.h>
40#include "gnunet_util_lib.h"
41#include "gnunet_constants.h"
42#include "gnunet_protocols.h"
43#include "gnunet_signatures.h"
45#include "gnunet_core_service.h"
46#include "gnunet_nse_service.h"
47#if ENABLE_NSE_HISTOGRAM
48#include "gnunet_testbed_logger_service.h"
49#endif
50#include "nse.h"
51#include <gcrypt.h>
52
53
58#define USE_RANDOM_DELAYS GNUNET_YES
59
63#define DEBUG_NSE GNUNET_NO
64
68#define HISTORY_SIZE 64
69
74#define NSE_PRIORITY \
75 (GNUNET_MQ_PRIO_BACKGROUND | GNUNET_MQ_PREF_UNRELIABLE \
76 | GNUNET_MQ_PREF_CORK_ALLOWED)
77
78#ifdef BSD
79#define log2(a) (log (a) / log (2))
80#endif
81
85static unsigned long long nse_work_required;
86
91
96
97#if ENABLE_NSE_HISTOGRAM
98
102struct GNUNET_CLIENT_TestHandle *logger_test;
103
107static struct GNUNET_TESTBED_LOGGER_Handle *lh;
108
112static struct GNUNET_BIO_WriteHandle *histogram;
113
114#endif
115
119static struct GNUNET_CRYPTO_PowSalt salt = { "gnunet-nse-proof" };
120
121
126{
131
135 const struct GNUNET_PeerIdentity *id;
136
141
148
149#if ENABLE_NSE_HISTOGRAM
153 unsigned int received_messages;
154
158 unsigned int transmitted_messages;
159
163 unsigned int last_transmitted_size;
164#endif
165};
166
167
169
176{
181
186
191
197
204
209
214
219};
221
225static const struct GNUNET_CONFIGURATION_Handle *cfg;
226
231
236
241
247
252static double current_std_dev = NAN;
253
257static uint32_t hop_count_max;
258
263
268
272static unsigned int estimate_index;
273
277static unsigned int estimate_count;
278
283
288
293
298
303
308
313
317static uint64_t my_proof;
318
319
326static void
328{
329 double mean;
330 double sum;
331 double std_dev;
332 double variance;
333 double val;
334 double nsize;
335
336#define WEST 1
337 /* Weighted incremental algorithm for stddev according to West (1979) */
338#if WEST
339 double sumweight;
340 double weight;
341 double q;
342 double r;
343 double temp;
344
345 mean = 0.0;
346 sum = 0.0;
347 sumweight = 0.0;
348 variance = 0.0;
349 for (unsigned int i = 0; i < estimate_count; i++)
350 {
351 unsigned int j = (estimate_index - i + HISTORY_SIZE) % HISTORY_SIZE;
352
353 val = htonl (size_estimate_messages[j].matching_bits);
354 weight = estimate_count + 1 - i;
355
356 temp = weight + sumweight;
357 q = val - mean;
358 r = q * weight / temp;
359 mean += r;
360 sum += sumweight * q * r;
361 sumweight = temp;
362 }
363 if (estimate_count > 0)
364 variance = (sum / sumweight) * estimate_count / (estimate_count - 1.0);
365#else
366 /* trivial version for debugging */
367 double vsq;
368
369 /* non-weighted trivial version */
370 sum = 0.0;
371 vsq = 0.0;
372 variance = 0.0;
373 mean = 0.0;
374
375 for (unsigned int i = 0; i < estimate_count; i++)
376 {
377 unsigned int j = (estimate_index - i + HISTORY_SIZE) % HISTORY_SIZE;
378
379 val = htonl (size_estimate_messages[j].matching_bits);
380 sum += val;
381 vsq += val * val;
382 }
383 if (0 != estimate_count)
384 {
385 mean = sum / estimate_count;
386 variance = (vsq - mean * sum)
387 / (estimate_count - 1.0); // terrible for numerical stability...
388 }
389#endif
390 if (variance >= 0)
391 std_dev = sqrt (variance);
392 else
393 std_dev = variance; /* return NaN (due to estimate_count == 0 causing 0.0/0.0) */
394 current_std_dev = std_dev;
396
397 em->header.size = htons (sizeof(struct GNUNET_NSE_ClientMessage));
399 em->reserved = htonl (0);
401 {
402 double se = mean - 0.332747;
403 unsigned int j = GNUNET_CONTAINER_multipeermap_size (peers);
404 if (0 == j)
405 j = 1; /* Avoid log2(0); can only happen if CORE didn't report
406 connection to self yet */
407 nsize = log2 (j);
408 em->size_estimate = GNUNET_hton_double (GNUNET_MAX (se, nsize));
409 em->std_deviation = GNUNET_hton_double (std_dev);
411 "# nodes in the network (estimate)",
412 (uint64_t) pow (2, GNUNET_MAX (se, nsize)),
413 GNUNET_NO);
414 }
415}
416
417
427static void
428handle_start (void *cls, const struct GNUNET_MessageHeader *message)
429{
430 struct GNUNET_SERVICE_Client *client = cls;
431 struct GNUNET_MQ_Handle *mq;
432 struct GNUNET_NSE_ClientMessage em;
433 struct GNUNET_MQ_Envelope *env;
434
435 (void) message;
436 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received START message from client\n");
443}
444
445
452static double
454{
455 /* Calculated as: S + f/2 - (f / pi) * (atan(x - p')) */
456 // S is next_timestamp (ignored in return value)
457 // f is frequency (gnunet_nse_interval)
458 // x is matching_bits
459 // p' is current_size_estimate
460 return ((double) gnunet_nse_interval.rel_value_us / (double) 2.0)
463}
464
465
472static struct GNUNET_TIME_Relative
474{
475#if USE_RANDOM_DELAYS
477 uint32_t i;
478 double d;
479
481 i = (uint32_t) (d / (double) (hop_count_max + 1));
482 ret.rel_value_us = i;
484 "Randomizing flood using latencies up to %s\n",
486 ret.rel_value_us =
488 return ret;
489#else
491#endif
492}
493
494
502static uint32_t
504 const struct GNUNET_PeerIdentity *id)
505{
506 struct GNUNET_HashCode timestamp_hash;
507 struct GNUNET_HashCode pid_hash;
508 struct GNUNET_HashCode xor;
509
511 sizeof(timestamp.abs_value_us),
512 &timestamp_hash);
514 sizeof(struct GNUNET_PeerIdentity),
515 &pid_hash);
516 GNUNET_CRYPTO_hash_xor (&pid_hash,
517 &timestamp_hash,
518 &xor);
520}
521
522
531static struct GNUNET_TIME_Relative
533{
535 struct GNUNET_TIME_Absolute tgt;
536 double dist_delay;
537 uint32_t matching_bits;
538
539 switch (round_offset)
540 {
541 case -1:
542 /* previous round is randomized between 0 and 50 ms */
543#if USE_RANDOM_DELAYS
544 ret.rel_value_us =
546#else
548#endif
550 "Transmitting previous round behind schedule in %s\n",
552 return ret;
553
554 case 0:
555 /* current round is based on best-known matching_bits */
560 ret.rel_value_us = (uint64_t) dist_delay;
562 "For round %s, delay for %u matching bits is %s\n",
564 (unsigned int) matching_bits,
566 /* now consider round start time and add delay to it */
569 }
570 GNUNET_break (0);
572}
573
574
580static void
582{
583 struct NSEPeerEntry *peer_entry = cls;
584 unsigned int idx;
585 struct GNUNET_MQ_Envelope *env;
586
587 peer_entry->transmit_task = NULL;
588 idx = estimate_index;
589 if (GNUNET_NO == peer_entry->previous_round)
590 {
591 idx = (idx + HISTORY_SIZE - 1) % HISTORY_SIZE;
592 peer_entry->previous_round = GNUNET_YES;
593 peer_entry->transmit_task =
596 peer_entry);
597 }
598 if ((0 == ntohl (size_estimate_messages[idx].hop_count)) &&
599 (NULL != proof_task))
600 {
602 "# flood messages not generated (no proof yet)",
603 1,
604 GNUNET_NO);
605 return;
606 }
607 if (0 == ntohs (size_estimate_messages[idx].header.size))
608 {
610 "# flood messages not generated (lack of history)",
611 1,
612 GNUNET_NO);
613 return;
614 }
616 "In round %s, sending to `%s' estimate with %u bits\n",
619 size_estimate_messages[idx].timestamp)),
620 GNUNET_i2s (peer_entry->id),
621 (unsigned int) ntohl (size_estimate_messages[idx].matching_bits));
622 if (0 == ntohl (size_estimate_messages[idx].hop_count))
623 GNUNET_STATISTICS_update (stats, "# flood messages started", 1, GNUNET_NO);
625 "# flood messages transmitted",
626 1,
627 GNUNET_NO);
628#if ENABLE_NSE_HISTOGRAM
629 peer_entry->transmitted_messages++;
630 peer_entry->last_transmitted_size =
632#endif
634 GNUNET_MQ_send (peer_entry->mq, env);
635}
636
637
644static void
646{
647 struct GNUNET_NSE_ClientMessage em;
648
651}
652
653
661static void
662setup_flood_message (unsigned int slot, struct GNUNET_TIME_Absolute ts)
663{
664 struct GNUNET_NSE_FloodMessage *fm;
665 uint32_t matching_bits;
666
668 fm = &size_estimate_messages[slot];
669 fm->header.size = htons (sizeof(struct GNUNET_NSE_FloodMessage));
671 fm->hop_count = htonl (0);
673 fm->purpose.size =
674 htonl (sizeof(struct GNUNET_NSE_FloodMessage)
675 - sizeof(struct GNUNET_MessageHeader) - sizeof(uint32_t)
676 - sizeof(struct GNUNET_CRYPTO_EddsaSignature));
677 fm->matching_bits = htonl (matching_bits);
679 fm->origin = my_identity;
681 if (nse_work_required > 0)
684 &fm->purpose,
685 &fm->signature));
686 else
687 memset (&fm->signature, 0, sizeof(fm->signature));
688}
689
690
700static int
702 const struct GNUNET_PeerIdentity *key,
703 void *value)
704{
705 struct NSEPeerEntry *peer_entry = value;
706 struct GNUNET_TIME_Relative delay;
707
708 (void) cls;
709 (void) key;
710 if (NULL != peer_entry->transmit_task)
711 {
713 peer_entry->previous_round = GNUNET_NO;
714 }
715#if ENABLE_NSE_HISTOGRAM
716 if (peer_entry->received_messages > 1)
718 "# extra messages",
719 peer_entry->received_messages - 1,
720 GNUNET_NO);
721 peer_entry->transmitted_messages = 0;
722 peer_entry->last_transmitted_size = 0;
723 peer_entry->received_messages = 0;
724#endif
725 delay =
726 get_transmit_delay ((GNUNET_NO == peer_entry->previous_round) ? -1 : 0);
727 peer_entry->transmit_task =
729 return GNUNET_OK;
730}
731
732
738static void
740{
741 struct GNUNET_TIME_Relative offset;
742
743 (void) cls;
744 flood_task = NULL;
746 if (0 != offset.rel_value_us)
747 {
748 /* somehow run early, delay more */
749 flood_task =
751 return;
752 }
763 {
764 /* we received a message for this round way early, use it! */
767 htonl (1 + ntohl (next_message.hop_count));
768 }
769 else
771 next_message.matching_bits = htonl (0); /* reset for 'next' round */
772 hop_count_max = 0;
773 for (unsigned int i = 0; i < HISTORY_SIZE; i++)
775 GNUNET_MAX (ntohl (size_estimate_messages[i].hop_count), hop_count_max);
777 flood_task =
779}
780
781
792 uint64_t val)
793{
794 char buf[sizeof(struct GNUNET_CRYPTO_EddsaPublicKey)
795 + sizeof(val)] GNUNET_ALIGN;
796 struct GNUNET_HashCode result;
797
798 GNUNET_memcpy (buf, &val, sizeof(val));
799 GNUNET_memcpy (&buf[sizeof(val)],
800 pkey,
801 sizeof(struct GNUNET_CRYPTO_EddsaPublicKey));
803 buf,
804 sizeof(buf),
805 &result);
808 ? GNUNET_YES
809 : GNUNET_NO;
810}
811
812
816static void
818{
819 char *proof;
820
821 if (GNUNET_OK !=
823 "NSE",
824 "PROOFFILE",
825 &proof))
826 return;
828 if (GNUNET_OK !=
830 &my_proof,
831 sizeof(my_proof),
835 "write",
836 proof);
838}
839
840
846static void
847find_proof (void *cls)
848{
849#define ROUND_SIZE 10
850 uint64_t counter;
851 char buf[sizeof(struct GNUNET_CRYPTO_EddsaPublicKey)
852 + sizeof(uint64_t)] GNUNET_ALIGN;
853 struct GNUNET_HashCode result;
854 unsigned int i;
855
856 (void) cls;
857 proof_task = NULL;
858 GNUNET_memcpy (&buf[sizeof(uint64_t)],
860 sizeof(struct GNUNET_PeerIdentity));
861 i = 0;
862 counter = my_proof;
863 while ((counter != UINT64_MAX) && (i < ROUND_SIZE))
864 {
865 GNUNET_memcpy (buf, &counter, sizeof(uint64_t));
867 buf,
868 sizeof(buf),
869 &result);
870 if (nse_work_required <=
872 {
873 my_proof = counter;
875 "Proof of work found: %llu!\n",
876 (unsigned long long) GNUNET_ntohll (counter));
877 write_proof ();
879 return;
880 }
881 counter++;
882 i++;
883 }
884 if (my_proof / (100 * ROUND_SIZE) < counter / (100 * ROUND_SIZE))
885 {
887 "Testing proofs currently at %llu\n",
888 (unsigned long long) counter);
889 /* remember progress every 100 rounds */
890 my_proof = counter;
891 write_proof ();
892 }
893 else
894 {
895 my_proof = counter;
896 }
897 proof_task =
900 &find_proof,
901 NULL);
902}
903
904
914static int
915verify_message_crypto (const struct GNUNET_NSE_FloodMessage *incoming_flood)
916{
917 if (GNUNET_YES != check_proof_of_work (&incoming_flood->origin.public_key,
918 incoming_flood->proof_of_work))
919 {
921 "Proof of work invalid: %llu!\n",
922 (unsigned long long) GNUNET_ntohll (
923 incoming_flood->proof_of_work));
924 GNUNET_break_op (0);
925 return GNUNET_NO;
926 }
927 if ((nse_work_required > 0) &&
928 (GNUNET_OK !=
930 &incoming_flood->purpose,
931 &incoming_flood->signature,
932 &incoming_flood->origin.public_key)))
933 {
934 GNUNET_break_op (0);
935 return GNUNET_NO;
936 }
937 return GNUNET_YES;
938}
939
940
950static int
952 const struct GNUNET_PeerIdentity *key,
953 void *value)
954{
955 struct NSEPeerEntry *exclude = cls;
956 struct NSEPeerEntry *peer_entry = value;
957 struct GNUNET_TIME_Relative delay;
958
959 (void) key;
960 if (peer_entry == exclude)
961 return GNUNET_OK; /* trigger of the update */
962 if (GNUNET_NO == peer_entry->previous_round)
963 {
964 /* still stuck in previous round, no point to update, check that
965 * we are active here though... */
966 if (NULL == peer_entry->transmit_task)
967 {
968 GNUNET_break (0);
969 }
970 return GNUNET_OK;
971 }
972 if (NULL != peer_entry->transmit_task)
973 {
975 peer_entry->transmit_task = NULL;
976 }
977 delay = get_transmit_delay (0);
978 peer_entry->transmit_task =
980 return GNUNET_OK;
981}
982
983
990static void
992 const struct GNUNET_NSE_FloodMessage *incoming_flood)
993{
994 struct NSEPeerEntry *peer_entry = cls;
995 struct GNUNET_TIME_Absolute ts;
996 uint32_t matching_bits;
997 unsigned int idx;
998
999#if ENABLE_NSE_HISTOGRAM
1000 {
1001 uint64_t t;
1002
1004 if (NULL != lh)
1005 GNUNET_TESTBED_LOGGER_write (lh, &t, sizeof(uint64_t));
1006 if (NULL != histogram)
1007 GNUNET_BIO_write_int64 (histogram, "histogram-time", t);
1008 }
1009#endif
1010 GNUNET_STATISTICS_update (stats, "# flood messages received", 1, GNUNET_NO);
1011 matching_bits = ntohl (incoming_flood->matching_bits);
1012#if DEBUG_NSE
1013 {
1014 char origin[5];
1015 char pred[5];
1016 struct GNUNET_PeerIdentity os;
1017
1019 sizeof(origin),
1020 "%s",
1021 GNUNET_i2s (&incoming_flood->origin));
1022 GNUNET_snprintf (pred, sizeof(pred), "%s", GNUNET_i2s (peer_entry->id));
1024 "Flood at %s from `%s' via `%s' at `%s' with bits %u\n",
1026 GNUNET_TIME_absolute_ntoh (incoming_flood->timestamp)),
1027 origin,
1028 pred,
1030 (unsigned int) matching_bits);
1031 }
1032#endif
1033
1034#if ENABLE_NSE_HISTOGRAM
1035 peer_entry->received_messages++;
1036 if ((peer_entry->transmitted_messages > 0) &&
1037 (peer_entry->last_transmitted_size >= matching_bits) )
1038 GNUNET_STATISTICS_update (stats, "# cross messages", 1, GNUNET_NO);
1039#endif
1040
1041 ts = GNUNET_TIME_absolute_ntoh (incoming_flood->timestamp);
1043 idx = estimate_index;
1044 else if (ts.abs_value_us ==
1048 {
1050 return; /* ignore, simply too early/late */
1051 if (GNUNET_YES != verify_message_crypto (incoming_flood))
1052 {
1054 "Peer %s is likely ill-configured!\n",
1055 GNUNET_i2s (peer_entry->id));
1056 GNUNET_break_op (0);
1057 return;
1058 }
1059 next_message = *incoming_flood;
1060 return;
1061 }
1062 else
1063 {
1065 "# flood messages discarded (clock skew too large)",
1066 1,
1067 GNUNET_NO);
1068 return;
1069 }
1070 if (0 == (GNUNET_memcmp (peer_entry->id, &my_identity)))
1071 {
1072 /* send to self, update our own estimate IF this also comes from us! */
1073 if (0 == GNUNET_memcmp (&incoming_flood->origin, &my_identity))
1075 return;
1076 }
1078 {
1079 /* Cancel transmission in the other direction, as this peer clearly has
1080 up-to-date information already. Even if we didn't talk to this peer in
1081 the previous round, we should no longer send it stale information as it
1082 told us about the current round! */
1083 peer_entry->previous_round = GNUNET_YES;
1084 if (idx != estimate_index)
1085 {
1086 /* do not transmit information for the previous round to this peer
1087 anymore (but allow current round) */
1088 return;
1089 }
1090 /* got up-to-date information for current round, cancel transmission to
1091 * this peer altogether */
1092 if (NULL != peer_entry->transmit_task)
1093 {
1095 peer_entry->transmit_task = NULL;
1096 }
1097 return;
1098 }
1100 {
1101 if ((idx < estimate_index) && (peer_entry->previous_round == GNUNET_YES))
1102 {
1103 peer_entry->previous_round = GNUNET_NO;
1104 }
1105 /* push back our result now, that peer is spreading bad information... */
1106 if (NULL != peer_entry->transmit_task)
1108 peer_entry->transmit_task =
1110 /* Not closer than our most recent message, no need to do work here */
1112 "# flood messages ignored (had closer already)",
1113 1,
1114 GNUNET_NO);
1115 return;
1116 }
1117 if (GNUNET_YES != verify_message_crypto (incoming_flood))
1118 {
1119 GNUNET_break_op (0);
1120 return;
1121 }
1124 /* Cancel transmission in the other direction, as this peer clearly has
1125 * up-to-date information already.
1126 */
1127 peer_entry->previous_round = GNUNET_YES;
1128 if (idx == estimate_index)
1129 {
1130 /* cancel any activity for current round */
1131 if (NULL != peer_entry->transmit_task)
1132 {
1134 peer_entry->transmit_task = NULL;
1135 }
1136 }
1137 size_estimate_messages[idx] = *incoming_flood;
1139 htonl (ntohl (incoming_flood->hop_count) + 1);
1141 GNUNET_MAX (ntohl (incoming_flood->hop_count) + 1, hop_count_max);
1143 "# estimated network diameter",
1145 GNUNET_NO);
1146
1147 /* have a new, better size estimate, inform clients */
1149
1150 /* flood to rest */
1153 peer_entry);
1154}
1155
1156
1164static void *
1166 const struct GNUNET_PeerIdentity *peer,
1167 struct GNUNET_MQ_Handle *mq)
1168{
1169 struct NSEPeerEntry *peer_entry;
1170
1171 (void) cls;
1173 "Peer `%s' connected to us\n",
1174 GNUNET_i2s (peer));
1175 /* set our default transmission options */
1177 /* create our peer entry for this peer */
1178 peer_entry = GNUNET_new (struct NSEPeerEntry);
1179 peer_entry->id = peer;
1180 peer_entry->mq = mq;
1183 peers,
1184 peer_entry->id,
1185 peer_entry,
1187 peer_entry->transmit_task =
1190 peer_entry);
1191 GNUNET_STATISTICS_update (stats, "# peers connected", 1, GNUNET_NO);
1192 return peer_entry;
1193}
1194
1195
1204static void
1206 const struct GNUNET_PeerIdentity *peer,
1207 void *internal_cls)
1208{
1209 struct NSEPeerEntry *pos = internal_cls;
1210
1211 (void) cls;
1213 "Peer `%s' disconnected from us\n",
1214 GNUNET_i2s (peer));
1217 if (NULL != pos->transmit_task)
1218 {
1220 pos->transmit_task = NULL;
1221 }
1222 GNUNET_free (pos);
1223 GNUNET_STATISTICS_update (stats, "# peers connected", -1, GNUNET_NO);
1224}
1225
1226
1227#if ENABLE_NSE_HISTOGRAM
1235static void
1236flush_comp_cb (void *cls, size_t size)
1237{
1238 (void) cls;
1239 (void) size;
1240 GNUNET_TESTBED_LOGGER_disconnect (lh);
1241 lh = NULL;
1242}
1243
1244
1245#endif
1246
1247
1253static void
1254shutdown_task (void *cls)
1255{
1256 (void) cls;
1257 if (NULL != flood_task)
1258 {
1260 flood_task = NULL;
1261 }
1262 if (NULL != proof_task)
1263 {
1265 proof_task = NULL;
1266 write_proof (); /* remember progress */
1267 }
1268 if (NULL != nc)
1269 {
1271 nc = NULL;
1272 }
1273 if (NULL != core_api)
1274 {
1276 core_api = NULL;
1277 }
1278 if (NULL != stats)
1279 {
1281 stats = NULL;
1282 }
1283 if (NULL != peers)
1284 {
1286 peers = NULL;
1287 }
1288 if (NULL != my_private_key)
1289 {
1291 my_private_key = NULL;
1292 }
1293#if ENABLE_NSE_HISTOGRAM
1294 if (NULL != logger_test)
1295 {
1296 GNUNET_CLIENT_service_test_cancel (logger_test);
1297 logger_test = NULL;
1298 }
1299 if (NULL != lh)
1300 {
1301 GNUNET_TESTBED_LOGGER_flush (lh, &flush_comp_cb, NULL);
1302 }
1303 if (NULL != histogram)
1304 {
1305 GNUNET_BIO_write_close (histogram, NULL);
1306 histogram = NULL;
1307 }
1308#endif
1309}
1310
1311
1318static void
1319core_init (void *cls, const struct GNUNET_PeerIdentity *identity)
1320{
1321 struct GNUNET_TIME_Absolute now;
1322 struct GNUNET_TIME_Absolute prev_time;
1323
1324 (void) cls;
1325 if (NULL == identity)
1326 {
1327 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Connection to core FAILED!\n");
1329 return;
1330 }
1332 now = GNUNET_TIME_absolute_get ();
1339 estimate_count = 0;
1341 {
1342 int idx = (estimate_index + HISTORY_SIZE - 1) % HISTORY_SIZE;
1343 prev_time.abs_value_us =
1345 setup_flood_message (idx, prev_time);
1348 }
1349 flood_task =
1351}
1352
1353
1354#if ENABLE_NSE_HISTOGRAM
1363static void
1364status_cb (void *cls, int status)
1365{
1366 (void) cls;
1367 logger_test = NULL;
1368 if (GNUNET_YES != status)
1369 {
1370 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Testbed logger not running\n");
1371 return;
1372 }
1373 if (NULL == (lh = GNUNET_TESTBED_LOGGER_connect (cfg)))
1374 {
1376 "Cannot connect to the testbed logger. Exiting.\n");
1378 }
1379}
1380
1381
1382#endif
1383
1384
1392static void
1393run (void *cls,
1394 const struct GNUNET_CONFIGURATION_Handle *c,
1396{
1397 struct GNUNET_MQ_MessageHandler core_handlers[] =
1398 { GNUNET_MQ_hd_fixed_size (p2p_estimate,
1401 NULL),
1403 char *proof;
1405
1406 (void) cls;
1407 (void) service;
1408 cfg = c;
1410 "NSE",
1411 "INTERVAL",
1413 {
1416 return;
1417 }
1419 "NSE",
1420 "WORKDELAY",
1422 {
1425 return;
1426 }
1428 "NSE",
1429 "WORKBITS",
1431 {
1434 return;
1435 }
1436 if (nse_work_required >= sizeof(struct GNUNET_HashCode) * 8)
1437 {
1439 "NSE",
1440 "WORKBITS",
1441 _ ("Value is too large.\n"));
1443 return;
1444 }
1445
1446#if ENABLE_NSE_HISTOGRAM
1447 {
1448 char *histogram_dir;
1449 char *histogram_fn;
1450
1452 "NSE",
1453 "HISTOGRAM_DIR",
1454 &histogram_dir))
1455 {
1457 0 < GNUNET_asprintf (&histogram_fn, "%s/timestamps", histogram_dir));
1458 GNUNET_free (histogram_dir);
1459 histogram = GNUNET_BIO_write_open_file (histogram_fn);
1460 if (NULL == histogram)
1462 "Unable to open histogram file `%s'\n",
1463 histogram_fn);
1464 GNUNET_free (histogram_fn);
1465 }
1466 logger_test = GNUNET_CLIENT_service_test ("testbed-logger",
1467 cfg,
1469 &status_cb,
1470 NULL);
1471 }
1472#endif
1473
1476 GNUNET_assert (NULL != pk);
1479 if (GNUNET_OK !=
1480 GNUNET_CONFIGURATION_get_value_filename (cfg, "NSE", "PROOFFILE", &proof))
1481 {
1484 my_private_key = NULL;
1486 return;
1487 }
1489 (sizeof(my_proof) !=
1491 my_proof = 0;
1493 proof_task =
1495 &find_proof,
1496 NULL);
1497
1500 /* Connect to core service and register core handlers */
1501 core_api =
1502 GNUNET_CORE_connect (cfg, /* Main configuration */
1503 NULL, /* Closure passed to functions */
1504 &core_init, /* Call core_init once connected */
1505 &handle_core_connect, /* Handle connects */
1506 &handle_core_disconnect, /* Handle disconnects */
1507 core_handlers); /* Register these handlers */
1508 if (NULL == core_api)
1509 {
1511 return;
1512 }
1514}
1515
1516
1525static void *
1527 struct GNUNET_SERVICE_Client *c,
1528 struct GNUNET_MQ_Handle *mq)
1529{
1530 (void) cls;
1531 (void) mq;
1532 return c;
1533}
1534
1535
1543static void
1545 struct GNUNET_SERVICE_Client *c,
1546 void *internal_cls)
1547{
1548 (void) cls;
1549 GNUNET_assert (c == internal_cls);
1550}
1551
1552
1558 &run,
1561 NULL,
1564 struct GNUNET_MessageHeader,
1565 NULL),
1567
1568
1569#if defined(__linux__) && defined(__GLIBC__)
1570#include <malloc.h>
1571
1575void __attribute__ ((constructor))
1576GNUNET_NSE_memory_init ()
1577{
1578 mallopt (M_TRIM_THRESHOLD, 4 * 1024);
1579 mallopt (M_TOP_PAD, 1 * 1024);
1580 malloc_trim (0);
1581}
1582
1583
1584#endif
1585
1586
1587/* end of gnunet-service-nse.c */
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static mp_limb_t d[(((256)+GMP_NUMB_BITS - 1)/GMP_NUMB_BITS)]
static int start
Set if we are to start default services (including ARM).
Definition: gnunet-arm.c:39
static int ret
Final status code.
Definition: gnunet-arm.c:94
struct GNUNET_HashCode key
The key used in the DHT.
static ogg_stream_state os
Ogg stream state.
struct GNUNET_CRYPTO_PrivateKey pk
Private key from command line option, or NULL.
static char * pkey
Public key of the zone to look in, in ASCII.
static char origin[GNUNET_DNSPARSER_MAX_NAME_LENGTH]
Current origin.
static char * value
Value of the record to add/remove.
static int status
The program status; 0 for success.
Definition: gnunet-nse.c:39
static struct GNUNET_IDENTITY_Handle * identity
Which namespace do we publish to? NULL if we do not publish to a namespace.
static int result
Global testing status.
static struct GNUNET_REVOCATION_Query * q
Handle for revocation query.
static unsigned long long matching_bits
Number of matching bits required for revocation.
static uint64_t proof
Definition: gnunet-scrypt.c:49
static struct GNUNET_SERVICE_Handle * service
Handle to our service instance.
static struct GNUNET_CONTAINER_MultiPeerMap * peers
Map of all connected peers.
static double current_std_dev
The standard deviation of the last HISTORY_SIZE network size estimates.
static struct GNUNET_NSE_FloodMessage size_estimate_messages[64]
Array of recent size estimate messages.
static void update_flood_message(void *cls)
Update our flood message to be sent (and our timestamps).
static void transmit_task_cb(void *cls)
Task that triggers a NSE P2P transmission.
static void core_init(void *cls, const struct GNUNET_PeerIdentity *identity)
Called on core init/fail.
static int update_flood_times(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
Update transmissions for the given peer for the current round based on updated proximity information.
static double get_matching_bits_delay(uint32_t matching_bits)
How long should we delay a message to go the given number of matching bits?
static unsigned int estimate_index
Index of most recent estimate.
static struct GNUNET_TIME_Relative gnunet_nse_interval
Interval for sending network size estimation flood requests.
static struct GNUNET_PeerIdentity my_identity
The peer identity of this peer.
#define NSE_PRIORITY
Message priority to use.
#define HISTORY_SIZE
Over how many values do we calculate the weighted average?
static enum GNUNET_GenericReturnValue check_proof_of_work(const struct GNUNET_CRYPTO_EddsaPublicKey *pkey, uint64_t val)
Check whether the given public key and integer are a valid proof of work.
static struct GNUNET_STATISTICS_Handle * stats
Handle to the statistics service.
static void setup_estimate_message(struct GNUNET_NSE_ClientMessage *em)
Initialize a message to clients with the current network size estimate.
static struct GNUNET_SCHEDULER_Task * proof_task
Task scheduled to compute our proof.
static struct GNUNET_TIME_Absolute current_timestamp
The current major time.
static struct GNUNET_NotificationContext * nc
Notification context, simplifies client broadcasts.
static void find_proof(void *cls)
Find our proof of work.
static unsigned int estimate_count
Number of valid entries in the history.
static void * handle_core_connect(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Method called whenever a peer connects.
static void update_network_size_estimate()
We've sent on our flood message or one that we received which was validated and closer than ours.
static struct GNUNET_TIME_Relative proof_find_delay
Interval between proof find runs.
static void shutdown_task(void *cls)
Task run during shutdown.
static int verify_message_crypto(const struct GNUNET_NSE_FloodMessage *incoming_flood)
An incoming flood message has been received which claims to have more bits matching than any we know ...
static uint64_t my_proof
Proof of work for this peer.
static struct GNUNET_CORE_Handle * core_api
Handle to the core service.
static unsigned long long nse_work_required
Amount of work required (W-bit collisions) for NSE proofs, in collision-bits.
static void run(void *cls, const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_SERVICE_Handle *service)
Handle network size estimate clients.
static GNUNET_NETWORK_STRUCT_END const struct GNUNET_CONFIGURATION_Handle * cfg
Handle to our current configuration.
static void setup_flood_message(unsigned int slot, struct GNUNET_TIME_Absolute ts)
Setup a flood message in our history array at the given slot offset for the given timestamp.
static int schedule_current_round(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
Schedule transmission for the given peer for the current round based on what we know about the desire...
static uint32_t hop_count_max
Current hop counter estimate (estimate for network diameter).
GNUNET_SERVICE_MAIN("nse", GNUNET_SERVICE_OPTION_NONE, &run, &client_connect_cb, &client_disconnect_cb, NULL, GNUNET_MQ_hd_fixed_size(start, GNUNET_MESSAGE_TYPE_NSE_START, struct GNUNET_MessageHeader, NULL), GNUNET_MQ_handler_end())
Define "main" method using service macro.
static struct GNUNET_TIME_Relative get_transmit_delay(int round_offset)
Get the transmission delay that should be applied for a particular round.
#define ROUND_SIZE
static void handle_start(void *cls, const struct GNUNET_MessageHeader *message)
Handler for START message from client, triggers an immediate current network estimate notification.
static struct GNUNET_NSE_FloodMessage next_message
Message for the next round, if we got any.
static struct GNUNET_SCHEDULER_Task * flood_task
Task scheduled to update our flood message for the next round.
static struct GNUNET_TIME_Absolute next_timestamp
The next major time.
static struct GNUNET_CRYPTO_PowSalt salt
Salt for PoW calculations.
static struct GNUNET_TIME_Relative get_delay_randomization(uint32_t matching_bits)
What delay randomization should we apply for a given number of matching bits?
static double current_size_estimate
The current network size estimate.
static void * client_connect_cb(void *cls, struct GNUNET_SERVICE_Client *c, struct GNUNET_MQ_Handle *mq)
Callback called when a client connects to the service.
static void client_disconnect_cb(void *cls, struct GNUNET_SERVICE_Client *c, void *internal_cls)
Callback called when a client disconnected from the service.
static void write_proof(void)
Write our current proof to disk.
static struct GNUNET_CRYPTO_EddsaPrivateKey * my_private_key
The private key of this peer.
static void handle_p2p_estimate(void *cls, const struct GNUNET_NSE_FloodMessage *incoming_flood)
Core handler for size estimate flooding messages.
static void handle_core_disconnect(void *cls, const struct GNUNET_PeerIdentity *peer, void *internal_cls)
Method called whenever a peer disconnects.
static uint32_t get_matching_bits(struct GNUNET_TIME_Absolute timestamp, const struct GNUNET_PeerIdentity *id)
Get the number of matching bits that the given timestamp has to the given peer ID.
static struct GNUNET_SCHEDULER_Task * t
Main task.
Core service; the main API for encrypted P2P communications.
API to retrieve the current network size estimate.
struct GNUNET_PQ_ResultSpec __attribute__
Constants for network protocols.
API to create, modify and access statistics.
enum GNUNET_GenericReturnValue GNUNET_BIO_write_close(struct GNUNET_BIO_WriteHandle *h, char **emsg)
Close an IO handle.
Definition: bio.c:556
struct GNUNET_BIO_WriteHandle * GNUNET_BIO_write_open_file(const char *fn)
Open a file for writing.
Definition: bio.c:508
enum GNUNET_GenericReturnValue GNUNET_BIO_write_int64(struct GNUNET_BIO_WriteHandle *h, const char *what, int64_t i)
Write an (u)int64_t.
Definition: bio.c:867
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_get_value_filename(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be the name of a file or directory.
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_get_value_number(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, unsigned long long *number)
Get a configuration value that should be a number.
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_get_value_time(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, struct GNUNET_TIME_Relative *time)
Get a configuration value that should be a relative time.
struct GNUNET_CORE_Handle * GNUNET_CORE_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, void *cls, GNUNET_CORE_StartupCallback init, GNUNET_CORE_ConnectEventHandler connects, GNUNET_CORE_DisconnectEventHandler disconnects, const struct GNUNET_MQ_MessageHandler *handlers)
Connect to the core service.
Definition: core_api.c:691
void GNUNET_CORE_disconnect(struct GNUNET_CORE_Handle *handle)
Disconnect from the core service.
Definition: core_api.c:729
uint64_t GNUNET_CRYPTO_random_u64(enum GNUNET_CRYPTO_Quality mode, uint64_t max)
Generate a random unsigned 64-bit value.
void GNUNET_CRYPTO_eddsa_key_get_public(const struct GNUNET_CRYPTO_EddsaPrivateKey *priv, struct GNUNET_CRYPTO_EddsaPublicKey *pub)
Extract the public key for the given private key.
Definition: crypto_ecc.c:200
enum GNUNET_GenericReturnValue GNUNET_CRYPTO_eddsa_sign_(const struct GNUNET_CRYPTO_EddsaPrivateKey *priv, const struct GNUNET_CRYPTO_EccSignaturePurpose *purpose, struct GNUNET_CRYPTO_EddsaSignature *sig)
EdDSA sign a given block.
Definition: crypto_ecc.c:624
uint32_t GNUNET_CRYPTO_random_u32(enum GNUNET_CRYPTO_Quality mode, uint32_t i)
Produce a random value.
enum GNUNET_GenericReturnValue GNUNET_CRYPTO_eddsa_verify_(uint32_t purpose, const struct GNUNET_CRYPTO_EccSignaturePurpose *validate, const struct GNUNET_CRYPTO_EddsaSignature *sig, const struct GNUNET_CRYPTO_EddsaPublicKey *pub)
Verify EdDSA signature.
Definition: crypto_ecc.c:707
struct GNUNET_CRYPTO_EddsaPrivateKey * GNUNET_CRYPTO_eddsa_key_create_from_configuration(const struct GNUNET_CONFIGURATION_Handle *cfg)
Create a new private key by reading our peer's key from the file specified in the configuration.
@ GNUNET_CRYPTO_QUALITY_WEAK
No good quality of the operation is needed (i.e., random numbers can be pseudo-random).
enum GNUNET_GenericReturnValue GNUNET_DISK_file_test(const char *fil)
Check that fil corresponds to a filename (of a file that exists and that is not a directory).
Definition: disk.c:482
enum GNUNET_GenericReturnValue GNUNET_DISK_fn_write(const char *fn, const void *buf, size_t buf_size, enum GNUNET_DISK_AccessPermissions mode)
Write a buffer to a file atomically.
Definition: disk.c:725
enum GNUNET_GenericReturnValue GNUNET_DISK_directory_remove(const char *filename)
Remove all files in a directory (rm -rf).
Definition: disk.c:1087
ssize_t GNUNET_DISK_fn_read(const char *fn, void *result, size_t len)
Read the contents of a binary file into a buffer.
Definition: disk.c:664
@ GNUNET_DISK_PERM_USER_READ
Owner can read.
@ GNUNET_DISK_PERM_USER_WRITE
Owner can write.
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:41
void GNUNET_CRYPTO_hash_xor(const struct GNUNET_HashCode *a, const struct GNUNET_HashCode *b, struct GNUNET_HashCode *result)
compute result = a ^ b
Definition: crypto_hash.c:135
void GNUNET_CONTAINER_multipeermap_destroy(struct GNUNET_CONTAINER_MultiPeerMap *map)
Destroy a hash map.
int GNUNET_CONTAINER_multipeermap_iterate(struct GNUNET_CONTAINER_MultiPeerMap *map, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map.
struct GNUNET_CONTAINER_MultiPeerMap * GNUNET_CONTAINER_multipeermap_create(unsigned int len, int do_not_copy_keys)
Create a multi peer map (hash map for public keys of peers).
unsigned int GNUNET_CONTAINER_multipeermap_size(const struct GNUNET_CONTAINER_MultiPeerMap *map)
Get the number of key-value pairs in the map.
int GNUNET_CONTAINER_multipeermap_put(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
enum GNUNET_GenericReturnValue GNUNET_CONTAINER_multipeermap_remove(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, const void *value)
Remove the given key-value pair from the map.
@ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY
There must only be one value per key; storing a value should fail if a value under the same key alrea...
unsigned int GNUNET_CRYPTO_hash_count_leading_zeros(const struct GNUNET_HashCode *h)
Count the number of leading 0 bits in h.
Definition: crypto_hash.c:177
#define GNUNET_NETWORK_STRUCT_BEGIN
Define as empty, GNUNET_PACKED should suffice, but this won't work on W32.
uint16_t type
The type of the message (GNUNET_MESSAGE_TYPE_XXXX), in big-endian format.
#define GNUNET_log(kind,...)
#define GNUNET_MAX(a, b)
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:54
void GNUNET_CRYPTO_pow_hash(const struct GNUNET_CRYPTO_PowSalt *salt, const void *buf, size_t buf_len, struct GNUNET_HashCode *result)
Calculate the 'proof-of-work' hash (an expensive hash).
Definition: crypto_pow.c:42
#define GNUNET_NETWORK_STRUCT_END
Define as empty, GNUNET_PACKED should suffice, but this won't work on W32;.
double GNUNET_hton_double(double d)
Convert double to network byte order.
Definition: common_endian.c:70
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
#define GNUNET_ALIGN
gcc-ism to force alignment; we use this to align char-arrays that may then be cast to 'struct's.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
GNUNET_GenericReturnValue
Named constants for return values.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
#define GNUNET_PACKED
gcc-ism to get packed structs.
@ GNUNET_SCHEDULER_PRIORITY_IDLE
Run when otherwise idle.
@ GNUNET_OK
@ GNUNET_YES
@ GNUNET_NO
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
void GNUNET_log_config_invalid(enum GNUNET_ErrorType kind, const char *section, const char *option, const char *required)
Log error message about invalid configuration option value.
void GNUNET_log_config_missing(enum GNUNET_ErrorType kind, const char *section, const char *option)
Log error message about missing configuration option.
#define GNUNET_log_strerror_file(level, cmd, filename)
Log an error message at log-level 'level' that indicates a failure of the command 'cmd' with the mess...
@ GNUNET_ERROR_TYPE_WARNING
@ GNUNET_ERROR_TYPE_ERROR
@ GNUNET_ERROR_TYPE_DEBUG
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
int GNUNET_snprintf(char *buf, size_t size, const char *format,...) __attribute__((format(printf
Like snprintf, just aborts if the buffer is of insufficient size.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_free(ptr)
Wrapper around free.
void GNUNET_notification_context_destroy(struct GNUNET_NotificationContext *nc)
Destroy the context, force disconnect for all subscribers.
Definition: nc.c:138
struct GNUNET_MQ_Envelope * GNUNET_MQ_msg_copy(const struct GNUNET_MessageHeader *hdr)
Create a new envelope by copying an existing message.
Definition: mq.c:550
void GNUNET_MQ_set_options(struct GNUNET_MQ_Handle *mq, enum GNUNET_MQ_PriorityPreferences pp)
Set application-specific options for this queue.
Definition: mq.c:888
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:305
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
struct GNUNET_NotificationContext * GNUNET_notification_context_create(unsigned int queue_length)
Create a new notification context.
Definition: nc.c:122
void GNUNET_notification_context_broadcast(struct GNUNET_NotificationContext *nc, const struct GNUNET_MessageHeader *msg, int can_drop)
Send a message to all subscribers of this context.
Definition: nc.c:190
#define GNUNET_MQ_hd_fixed_size(name, code, str, ctx)
void GNUNET_notification_context_add(struct GNUNET_NotificationContext *nc, struct GNUNET_MQ_Handle *mq)
Add a subscriber to the notification context.
Definition: nc.c:161
#define GNUNET_MESSAGE_TYPE_NSE_START
client->service message indicating start
#define GNUNET_MESSAGE_TYPE_NSE_P2P_FLOOD
P2P message sent from nearest peer.
#define GNUNET_MESSAGE_TYPE_NSE_ESTIMATE
service->client message indicating
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:567
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_at(struct GNUNET_TIME_Absolute at, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run at the specified time.
Definition: scheduler.c:1255
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_shutdown(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run on shutdown, that is when a CTRL-C signal is received,...
Definition: scheduler.c:1340
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:981
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_now(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run as soon as possible.
Definition: scheduler.c:1305
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1278
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed_with_priority(struct GNUNET_TIME_Relative delay, enum GNUNET_SCHEDULER_Priority priority, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1208
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_with_priority(enum GNUNET_SCHEDULER_Priority prio, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified priority.
Definition: scheduler.c:1232
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2566
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2455
@ GNUNET_SERVICE_OPTION_NONE
Use defaults.
struct GNUNET_STATISTICS_Handle * GNUNET_STATISTICS_create(const char *subsystem, const struct GNUNET_CONFIGURATION_Handle *cfg)
Get handle for the statistics service.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).
#define GNUNET_TIME_UNIT_FOREVER_REL
Constant used to specify "forever".
#define GNUNET_TIME_UNIT_SECONDS
One second.
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_remaining(struct GNUNET_TIME_Absolute future)
Given a timestamp in the future, how much time remains until then?
Definition: time.c:405
const char * GNUNET_STRINGS_relative_time_to_string(struct GNUNET_TIME_Relative delta, int do_round)
Give relative time in human-readable fancy format.
Definition: strings.c:570
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:111
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:737
#define GNUNET_TIME_UNIT_ZERO
Relative time zero.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_add(struct GNUNET_TIME_Absolute start, struct GNUNET_TIME_Relative duration)
Add a given relative duration to the given start time.
Definition: time.c:450
struct GNUNET_TIME_AbsoluteNBO GNUNET_TIME_absolute_hton(struct GNUNET_TIME_Absolute a)
Convert absolute time to network byte order.
Definition: time.c:638
const char * GNUNET_STRINGS_absolute_time_to_string(struct GNUNET_TIME_Absolute t)
Like asctime, except for GNUnet time.
Definition: strings.c:617
Common type definitions for the network size estimation service and API.
static unsigned int size
Size of the "table".
Definition: peer.c:68
#define _(String)
GNU gettext support macro.
Definition: platform.h:178
#define GNUNET_SIGNATURE_PURPOSE_NSE_SEND
Signature of a network size estimate message.
Handle for buffered writing.
Definition: bio.c:466
Internal representation of the hash map.
Context for the core service connection.
Definition: core_api.c:78
header of what an ECC signature signs this must be followed by "size - 8" bytes of the actual signed ...
uint32_t size
How many bytes does this signature sign? (including this purpose header); in network byte order (!...
uint32_t purpose
What does this signature vouch for? This must contain a GNUNET_SIGNATURE_PURPOSE_XXX constant (from g...
Private ECC key encoded for transmission.
Public ECC key (always for curve Ed25519) encoded in a format suitable for network transmission and E...
an ECC signature using EdDSA.
Value for a salt for GNUNET_CRYPTO_pow_hash().
A 512-bit hashcode.
Handle to a message queue.
Definition: mq.c:87
Message handler for a specific message type.
Header for all communications.
Network size estimate sent from the service to clients.
Definition: nse.h:43
uint32_t reserved
For alignment.
Definition: nse.h:52
double size_estimate
The current estimated network size.
Definition: nse.h:62
struct GNUNET_TIME_AbsoluteNBO timestamp
Timestamp at which the server received the message.
Definition: nse.h:57
double std_deviation
The standard deviation (rounded down to the nearest integer) of size estimations.
Definition: nse.h:69
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_NSE_ESTIMATE.
Definition: nse.h:47
Network size estimate reply; sent when "this" peer's timer has run out before receiving a valid reply...
uint32_t hop_count
Number of hops this message has taken so far.
uint32_t matching_bits
Number of matching bits between the hash of timestamp and the initiator's public key.
struct GNUNET_TIME_AbsoluteNBO timestamp
The current timestamp value (which all peers should agree on).
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_NSE_P2P_FLOOD.
struct GNUNET_PeerIdentity origin
Public key of the originator.
uint64_t proof_of_work
Proof of work, causing leading zeros when hashed with pkey.
struct GNUNET_CRYPTO_EccSignaturePurpose purpose
Purpose.
struct GNUNET_CRYPTO_EddsaSignature signature
Signature (over range specified in purpose).
The notification context is the key datastructure for a convenience API used for transmission of noti...
Definition: nc.c:77
The identity of the host (wraps the signing key of the peer).
struct GNUNET_CRYPTO_EddsaPublicKey public_key
Entry in list of pending tasks.
Definition: scheduler.c:136
Handle to a client that is connected to a service.
Definition: service.c:246
Handle to a service.
Definition: service.c:117
Handle for the service.
Time for absolute time used by GNUnet, in microseconds and in network byte order.
Time for absolute times used by GNUnet, in microseconds.
uint64_t abs_value_us
The actual value.
Time for relative time used by GNUnet, in microseconds.
uint64_t rel_value_us
The actual value.
Per-peer information.
struct GNUNET_MQ_Handle * mq
Core handle for sending messages to this peer.
struct GNUNET_SCHEDULER_Task * transmit_task
Task scheduled to send message to this peer.
const struct GNUNET_PeerIdentity * id
What is the identity of the peer?
int previous_round
Did we receive or send a message about the previous round to this peer yet? GNUNET_YES if the previou...