GNUnet  0.11.x
gnunet-service-nse.c
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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
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 
85 static unsigned long long nse_work_required;
86 
91 
96 
97 #if ENABLE_NSE_HISTOGRAM
98 
102 struct GNUNET_CLIENT_TestHandle *logger_test;
103 
107 static struct GNUNET_TESTBED_LOGGER_Handle *lh;
108 
112 static struct GNUNET_BIO_WriteHandle *histogram;
113 
114 #endif
115 
119 static 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 
225 static const struct GNUNET_CONFIGURATION_Handle *cfg;
226 
231 
236 
241 
246 static double current_size_estimate;
247 
252 static double current_std_dev = NAN;
253 
257 static uint32_t hop_count_max;
258 
263 
268 
272 static unsigned int estimate_index;
273 
277 static unsigned int estimate_count;
278 
283 
288 
293 
298 
303 
308 
312 static struct GNUNET_PeerIdentity my_identity;
313 
317 static uint64_t my_proof;
318 
319 
326 static 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;
395  current_size_estimate = mean;
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 
427 static void
428 handle_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");
437  mq = GNUNET_SERVICE_client_get_mq (client);
440  env = GNUNET_MQ_msg_copy (&em.header);
441  GNUNET_MQ_send (mq, env);
443 }
444 
445 
452 static 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 
472 static struct GNUNET_TIME_Relative
474 {
475 #if USE_RANDOM_DELAYS
476  struct GNUNET_TIME_Relative ret;
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
490  return GNUNET_TIME_UNIT_ZERO;
491 #endif
492 }
493 
494 
502 static uint32_t
504  const struct GNUNET_PeerIdentity *id)
505 {
506  struct GNUNET_HashCode timestamp_hash;
507  struct GNUNET_HashCode pid_hash;
508 
509  GNUNET_CRYPTO_hash (&timestamp.abs_value_us,
510  sizeof(timestamp.abs_value_us),
511  &timestamp_hash);
512  GNUNET_CRYPTO_hash (id, sizeof(struct GNUNET_PeerIdentity), &pid_hash);
513  return GNUNET_CRYPTO_hash_matching_bits (&timestamp_hash, &pid_hash);
514 }
515 
516 
525 static struct GNUNET_TIME_Relative
526 get_transmit_delay (int round_offset)
527 {
528  struct GNUNET_TIME_Relative ret;
529  struct GNUNET_TIME_Absolute tgt;
530  double dist_delay;
531  uint32_t matching_bits;
532 
533  switch (round_offset)
534  {
535  case -1:
536  /* previous round is randomized between 0 and 50 ms */
537 #if USE_RANDOM_DELAYS
538  ret.rel_value_us =
540 #else
542 #endif
544  "Transmitting previous round behind schedule in %s\n",
546  return ret;
547 
548  case 0:
549  /* current round is based on best-known matching_bits */
550  matching_bits =
552  dist_delay = get_matching_bits_delay (matching_bits);
554  ret.rel_value_us = (uint64_t) dist_delay;
556  "For round %s, delay for %u matching bits is %s\n",
558  (unsigned int) matching_bits,
560  /* now consider round start time and add delay to it */
563  }
564  GNUNET_break (0);
566 }
567 
568 
574 static void
575 transmit_task_cb (void *cls)
576 {
577  struct NSEPeerEntry *peer_entry = cls;
578  unsigned int idx;
579  struct GNUNET_MQ_Envelope *env;
580 
581  peer_entry->transmit_task = NULL;
582  idx = estimate_index;
583  if (GNUNET_NO == peer_entry->previous_round)
584  {
585  idx = (idx + HISTORY_SIZE - 1) % HISTORY_SIZE;
586  peer_entry->previous_round = GNUNET_YES;
587  peer_entry->transmit_task =
590  peer_entry);
591  }
592  if ((0 == ntohl (size_estimate_messages[idx].hop_count)) &&
593  (NULL != proof_task))
594  {
596  "# flood messages not generated (no proof yet)",
597  1,
598  GNUNET_NO);
599  return;
600  }
601  if (0 == ntohs (size_estimate_messages[idx].header.size))
602  {
604  "# flood messages not generated (lack of history)",
605  1,
606  GNUNET_NO);
607  return;
608  }
610  "In round %s, sending to `%s' estimate with %u bits\n",
613  size_estimate_messages[idx].timestamp)),
614  GNUNET_i2s (peer_entry->id),
615  (unsigned int) ntohl (size_estimate_messages[idx].matching_bits));
616  if (0 == ntohl (size_estimate_messages[idx].hop_count))
617  GNUNET_STATISTICS_update (stats, "# flood messages started", 1, GNUNET_NO);
619  "# flood messages transmitted",
620  1,
621  GNUNET_NO);
622 #if ENABLE_NSE_HISTOGRAM
623  peer_entry->transmitted_messages++;
624  peer_entry->last_transmitted_size =
626 #endif
628  GNUNET_MQ_send (peer_entry->mq, env);
629 }
630 
631 
638 static void
640 {
641  struct GNUNET_NSE_ClientMessage em;
642 
645 }
646 
647 
655 static void
656 setup_flood_message (unsigned int slot, struct GNUNET_TIME_Absolute ts)
657 {
658  struct GNUNET_NSE_FloodMessage *fm;
659  uint32_t matching_bits;
660 
662  fm = &size_estimate_messages[slot];
663  fm->header.size = htons (sizeof(struct GNUNET_NSE_FloodMessage));
665  fm->hop_count = htonl (0);
667  fm->purpose.size =
668  htonl (sizeof(struct GNUNET_NSE_FloodMessage)
669  - sizeof(struct GNUNET_MessageHeader) - sizeof(uint32_t)
670  - sizeof(struct GNUNET_CRYPTO_EddsaSignature));
671  fm->matching_bits = htonl (matching_bits);
673  fm->origin = my_identity;
674  fm->proof_of_work = my_proof;
675  if (nse_work_required > 0)
678  &fm->purpose,
679  &fm->signature));
680  else
681  memset (&fm->signature, 0, sizeof(fm->signature));
682 }
683 
684 
694 static int
696  const struct GNUNET_PeerIdentity *key,
697  void *value)
698 {
699  struct NSEPeerEntry *peer_entry = value;
701 
702  (void) cls;
703  (void) key;
704  if (NULL != peer_entry->transmit_task)
705  {
707  peer_entry->previous_round = GNUNET_NO;
708  }
709 #if ENABLE_NSE_HISTOGRAM
710  if (peer_entry->received_messages > 1)
712  "# extra messages",
713  peer_entry->received_messages - 1,
714  GNUNET_NO);
715  peer_entry->transmitted_messages = 0;
716  peer_entry->last_transmitted_size = 0;
717  peer_entry->received_messages = 0;
718 #endif
719  delay =
720  get_transmit_delay ((GNUNET_NO == peer_entry->previous_round) ? -1 : 0);
721  peer_entry->transmit_task =
723  return GNUNET_OK;
724 }
725 
726 
732 static void
734 {
735  struct GNUNET_TIME_Relative offset;
736 
737  (void) cls;
738  flood_task = NULL;
740  if (0 != offset.rel_value_us)
741  {
742  /* somehow run early, delay more */
743  flood_task =
745  return;
746  }
749  estimate_count++;
756  ntohl (next_message.matching_bits)))
757  {
758  /* we received a message for this round way early, use it! */
761  htonl (1 + ntohl (next_message.hop_count));
762  }
763  else
765  next_message.matching_bits = htonl (0); /* reset for 'next' round */
766  hop_count_max = 0;
767  for (unsigned int i = 0; i < HISTORY_SIZE; i++)
768  hop_count_max =
769  GNUNET_MAX (ntohl (size_estimate_messages[i].hop_count), hop_count_max);
771  flood_task =
773 }
774 
775 
782 static unsigned int
784 {
785  unsigned int hash_count;
786 
787  hash_count = 0;
788  while (0 == GNUNET_CRYPTO_hash_get_bit_ltr (hash, hash_count))
789  hash_count++;
790  return hash_count;
791 }
792 
793 
802 static int
804  uint64_t val)
805 {
806  char buf[sizeof(struct GNUNET_CRYPTO_EddsaPublicKey)
807  + sizeof(val)] GNUNET_ALIGN;
808  struct GNUNET_HashCode result;
809 
810  GNUNET_memcpy (buf, &val, sizeof(val));
811  GNUNET_memcpy (&buf[sizeof(val)],
812  pkey,
813  sizeof(struct GNUNET_CRYPTO_EddsaPublicKey));
815  buf,
816  sizeof(buf),
817  &result);
819  : GNUNET_NO;
820 }
821 
822 
826 static void
828 {
829  char *proof;
830 
831  if (GNUNET_OK !=
833  "NSE",
834  "PROOFFILE",
835  &proof))
836  return;
838  if (GNUNET_OK !=
840  &my_proof,
841  sizeof(my_proof),
845  "write",
846  proof);
847  GNUNET_free (proof);
848 }
849 
850 
856 static void
857 find_proof (void *cls)
858 {
859 #define ROUND_SIZE 10
860  uint64_t counter;
861  char buf[sizeof(struct GNUNET_CRYPTO_EddsaPublicKey)
862  + sizeof(uint64_t)] GNUNET_ALIGN;
863  struct GNUNET_HashCode result;
864  unsigned int i;
865 
866  (void) cls;
867  proof_task = NULL;
868  GNUNET_memcpy (&buf[sizeof(uint64_t)],
869  &my_identity,
870  sizeof(struct GNUNET_PeerIdentity));
871  i = 0;
872  counter = my_proof;
873  while ((counter != UINT64_MAX) && (i < ROUND_SIZE))
874  {
875  GNUNET_memcpy (buf, &counter, sizeof(uint64_t));
877  buf,
878  sizeof(buf),
879  &result);
881  {
882  my_proof = counter;
884  "Proof of work found: %llu!\n",
885  (unsigned long long) GNUNET_ntohll (counter));
886  write_proof ();
888  return;
889  }
890  counter++;
891  i++;
892  }
893  if (my_proof / (100 * ROUND_SIZE) < counter / (100 * ROUND_SIZE))
894  {
896  "Testing proofs currently at %llu\n",
897  (unsigned long long) counter);
898  /* remember progress every 100 rounds */
899  my_proof = counter;
900  write_proof ();
901  }
902  else
903  {
904  my_proof = counter;
905  }
906  proof_task =
909  &find_proof,
910  NULL);
911 }
912 
913 
923 static int
924 verify_message_crypto (const struct GNUNET_NSE_FloodMessage *incoming_flood)
925 {
926  if (GNUNET_YES != check_proof_of_work (&incoming_flood->origin.public_key,
927  incoming_flood->proof_of_work))
928  {
930  "Proof of work invalid: %llu!\n",
931  (unsigned long long) GNUNET_ntohll (
932  incoming_flood->proof_of_work));
933  GNUNET_break_op (0);
934  return GNUNET_NO;
935  }
936  if ((nse_work_required > 0) &&
937  (GNUNET_OK !=
939  &incoming_flood->purpose,
940  &incoming_flood->signature,
941  &incoming_flood->origin.public_key)))
942  {
943  GNUNET_break_op (0);
944  return GNUNET_NO;
945  }
946  return GNUNET_YES;
947 }
948 
949 
959 static int
961  const struct GNUNET_PeerIdentity *key,
962  void *value)
963 {
964  struct NSEPeerEntry *exclude = cls;
965  struct NSEPeerEntry *peer_entry = value;
967 
968  (void) key;
969  if (peer_entry == exclude)
970  return GNUNET_OK; /* trigger of the update */
971  if (GNUNET_NO == peer_entry->previous_round)
972  {
973  /* still stuck in previous round, no point to update, check that
974  * we are active here though... */
975  if (NULL == peer_entry->transmit_task)
976  {
977  GNUNET_break (0);
978  }
979  return GNUNET_OK;
980  }
981  if (NULL != peer_entry->transmit_task)
982  {
984  peer_entry->transmit_task = NULL;
985  }
987  peer_entry->transmit_task =
989  return GNUNET_OK;
990 }
991 
992 
999 static void
1001  const struct GNUNET_NSE_FloodMessage *incoming_flood)
1002 {
1003  struct NSEPeerEntry *peer_entry = cls;
1004  struct GNUNET_TIME_Absolute ts;
1005  uint32_t matching_bits;
1006  unsigned int idx;
1007 
1008 #if ENABLE_NSE_HISTOGRAM
1009  {
1010  uint64_t t;
1011 
1013  if (NULL != lh)
1014  GNUNET_TESTBED_LOGGER_write (lh, &t, sizeof(uint64_t));
1015  if (NULL != histogram)
1016  GNUNET_BIO_write_int64 (histogram, "histogram-time", t);
1017  }
1018 #endif
1019  GNUNET_STATISTICS_update (stats, "# flood messages received", 1, GNUNET_NO);
1020  matching_bits = ntohl (incoming_flood->matching_bits);
1021 #if DEBUG_NSE
1022  {
1023  char origin[5];
1024  char pred[5];
1025  struct GNUNET_PeerIdentity os;
1026 
1027  GNUNET_snprintf (origin,
1028  sizeof(origin),
1029  "%s",
1030  GNUNET_i2s (&incoming_flood->origin));
1031  GNUNET_snprintf (pred, sizeof(pred), "%s", GNUNET_i2s (peer_entry->id));
1033  "Flood at %s from `%s' via `%s' at `%s' with bits %u\n",
1035  GNUNET_TIME_absolute_ntoh (incoming_flood->timestamp)),
1036  origin,
1037  pred,
1039  (unsigned int) matching_bits);
1040  }
1041 #endif
1042 
1043 #if ENABLE_NSE_HISTOGRAM
1044  peer_entry->received_messages++;
1045  if ((peer_entry->transmitted_messages > 0) &&
1046  (peer_entry->last_transmitted_size >= matching_bits) )
1047  GNUNET_STATISTICS_update (stats, "# cross messages", 1, GNUNET_NO);
1048 #endif
1049 
1050  ts = GNUNET_TIME_absolute_ntoh (incoming_flood->timestamp);
1052  idx = estimate_index;
1053  else if (ts.abs_value_us ==
1055  idx = (estimate_index + HISTORY_SIZE - 1) % HISTORY_SIZE;
1056  else if (ts.abs_value_us == next_timestamp.abs_value_us)
1057  {
1058  if (matching_bits <= ntohl (next_message.matching_bits))
1059  return; /* ignore, simply too early/late */
1060  if (GNUNET_YES != verify_message_crypto (incoming_flood))
1061  {
1063  "Peer %s is likely ill-configured!\n",
1064  GNUNET_i2s (peer_entry->id));
1065  GNUNET_break_op (0);
1066  return;
1067  }
1068  next_message = *incoming_flood;
1069  return;
1070  }
1071  else
1072  {
1074  "# flood messages discarded (clock skew too large)",
1075  1,
1076  GNUNET_NO);
1077  return;
1078  }
1079  if (0 == (GNUNET_memcmp (peer_entry->id, &my_identity)))
1080  {
1081  /* send to self, update our own estimate IF this also comes from us! */
1082  if (0 == GNUNET_memcmp (&incoming_flood->origin, &my_identity))
1084  return;
1085  }
1087  {
1088  /* Cancel transmission in the other direction, as this peer clearly has
1089  up-to-date information already. Even if we didn't talk to this peer in
1090  the previous round, we should no longer send it stale information as it
1091  told us about the current round! */
1092  peer_entry->previous_round = GNUNET_YES;
1093  if (idx != estimate_index)
1094  {
1095  /* do not transmit information for the previous round to this peer
1096  anymore (but allow current round) */
1097  return;
1098  }
1099  /* got up-to-date information for current round, cancel transmission to
1100  * this peer altogether */
1101  if (NULL != peer_entry->transmit_task)
1102  {
1103  GNUNET_SCHEDULER_cancel (peer_entry->transmit_task);
1104  peer_entry->transmit_task = NULL;
1105  }
1106  return;
1107  }
1109  {
1110  if ((idx < estimate_index) && (peer_entry->previous_round == GNUNET_YES))
1111  {
1112  peer_entry->previous_round = GNUNET_NO;
1113  }
1114  /* push back our result now, that peer is spreading bad information... */
1115  if (NULL != peer_entry->transmit_task)
1116  GNUNET_SCHEDULER_cancel (peer_entry->transmit_task);
1117  peer_entry->transmit_task =
1119  /* Not closer than our most recent message, no need to do work here */
1121  "# flood messages ignored (had closer already)",
1122  1,
1123  GNUNET_NO);
1124  return;
1125  }
1126  if (GNUNET_YES != verify_message_crypto (incoming_flood))
1127  {
1128  GNUNET_break_op (0);
1129  return;
1130  }
1132  ntohl (size_estimate_messages[idx].matching_bits));
1133  /* Cancel transmission in the other direction, as this peer clearly has
1134  * up-to-date information already.
1135  */
1136  peer_entry->previous_round = GNUNET_YES;
1137  if (idx == estimate_index)
1138  {
1139  /* cancel any activity for current round */
1140  if (NULL != peer_entry->transmit_task)
1141  {
1142  GNUNET_SCHEDULER_cancel (peer_entry->transmit_task);
1143  peer_entry->transmit_task = NULL;
1144  }
1145  }
1146  size_estimate_messages[idx] = *incoming_flood;
1148  htonl (ntohl (incoming_flood->hop_count) + 1);
1149  hop_count_max =
1150  GNUNET_MAX (ntohl (incoming_flood->hop_count) + 1, hop_count_max);
1152  "# estimated network diameter",
1153  hop_count_max,
1154  GNUNET_NO);
1155 
1156  /* have a new, better size estimate, inform clients */
1158 
1159  /* flood to rest */
1162  peer_entry);
1163 }
1164 
1165 
1173 static void *
1175  const struct GNUNET_PeerIdentity *peer,
1176  struct GNUNET_MQ_Handle *mq)
1177 {
1178  struct NSEPeerEntry *peer_entry;
1179 
1180  (void) cls;
1182  "Peer `%s' connected to us\n",
1183  GNUNET_i2s (peer));
1184  /* set our default transmission options */
1186  /* create our peer entry for this peer */
1187  peer_entry = GNUNET_new (struct NSEPeerEntry);
1188  peer_entry->id = peer;
1189  peer_entry->mq = mq;
1192  peers,
1193  peer_entry->id,
1194  peer_entry,
1196  peer_entry->transmit_task =
1199  peer_entry);
1200  GNUNET_STATISTICS_update (stats, "# peers connected", 1, GNUNET_NO);
1201  return peer_entry;
1202 }
1203 
1204 
1213 static void
1215  const struct GNUNET_PeerIdentity *peer,
1216  void *internal_cls)
1217 {
1218  struct NSEPeerEntry *pos = internal_cls;
1219 
1220  (void) cls;
1222  "Peer `%s' disconnected from us\n",
1223  GNUNET_i2s (peer));
1226  if (NULL != pos->transmit_task)
1227  {
1229  pos->transmit_task = NULL;
1230  }
1231  GNUNET_free (pos);
1232  GNUNET_STATISTICS_update (stats, "# peers connected", -1, GNUNET_NO);
1233 }
1234 
1235 
1236 #if ENABLE_NSE_HISTOGRAM
1244 static void
1245 flush_comp_cb (void *cls, size_t size)
1246 {
1247  (void) cls;
1248  (void) size;
1250  lh = NULL;
1251 }
1252 
1253 
1254 #endif
1255 
1256 
1262 static void
1263 shutdown_task (void *cls)
1264 {
1265  (void) cls;
1266  if (NULL != flood_task)
1267  {
1269  flood_task = NULL;
1270  }
1271  if (NULL != proof_task)
1272  {
1274  proof_task = NULL;
1275  write_proof (); /* remember progress */
1276  }
1277  if (NULL != nc)
1278  {
1280  nc = NULL;
1281  }
1282  if (NULL != core_api)
1283  {
1285  core_api = NULL;
1286  }
1287  if (NULL != stats)
1288  {
1290  stats = NULL;
1291  }
1292  if (NULL != peers)
1293  {
1295  peers = NULL;
1296  }
1297  if (NULL != my_private_key)
1298  {
1300  my_private_key = NULL;
1301  }
1302 #if ENABLE_NSE_HISTOGRAM
1303  if (NULL != logger_test)
1304  {
1305  GNUNET_CLIENT_service_test_cancel (logger_test);
1306  logger_test = NULL;
1307  }
1308  if (NULL != lh)
1309  {
1310  GNUNET_TESTBED_LOGGER_flush (lh, &flush_comp_cb, NULL);
1311  }
1312  if (NULL != histogram)
1313  {
1314  GNUNET_BIO_write_close (histogram, NULL);
1315  histogram = NULL;
1316  }
1317 #endif
1318 }
1319 
1320 
1327 static void
1328 core_init (void *cls, const struct GNUNET_PeerIdentity *identity)
1329 {
1330  struct GNUNET_TIME_Absolute now;
1331  struct GNUNET_TIME_Absolute prev_time;
1332 
1333  (void) cls;
1334  if (NULL == identity)
1335  {
1336  GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Connection to core FAILED!\n");
1338  return;
1339  }
1341  now = GNUNET_TIME_absolute_get ();
1345  next_timestamp =
1348  estimate_count = 0;
1350  {
1351  int idx = (estimate_index + HISTORY_SIZE - 1) % HISTORY_SIZE;
1352  prev_time.abs_value_us =
1354  setup_flood_message (idx, prev_time);
1356  estimate_count++;
1357  }
1358  flood_task =
1360 }
1361 
1362 
1363 #if ENABLE_NSE_HISTOGRAM
1372 static void
1373 status_cb (void *cls, int status)
1374 {
1375  (void) cls;
1376  logger_test = NULL;
1377  if (GNUNET_YES != status)
1378  {
1379  GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Testbed logger not running\n");
1380  return;
1381  }
1382  if (NULL == (lh = GNUNET_TESTBED_LOGGER_connect (cfg)))
1383  {
1385  "Cannot connect to the testbed logger. Exiting.\n");
1387  }
1388 }
1389 
1390 
1391 #endif
1392 
1393 
1401 static void
1402 run (void *cls,
1403  const struct GNUNET_CONFIGURATION_Handle *c,
1405 {
1406  struct GNUNET_MQ_MessageHandler core_handlers[] =
1407  { GNUNET_MQ_hd_fixed_size (p2p_estimate,
1409  struct GNUNET_NSE_FloodMessage,
1410  NULL),
1411  GNUNET_MQ_handler_end () };
1412  char *proof;
1414 
1415  (void) cls;
1416  (void) service;
1417  cfg = c;
1419  "NSE",
1420  "INTERVAL",
1422  {
1425  return;
1426  }
1428  "NSE",
1429  "WORKDELAY",
1430  &proof_find_delay))
1431  {
1432  GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, "NSE", "WORKDELAY");
1434  return;
1435  }
1437  "NSE",
1438  "WORKBITS",
1440  {
1443  return;
1444  }
1445  if (nse_work_required >= sizeof(struct GNUNET_HashCode) * 8)
1446  {
1448  "NSE",
1449  "WORKBITS",
1450  _ ("Value is too large.\n"));
1452  return;
1453  }
1454 
1455 #if ENABLE_NSE_HISTOGRAM
1456  {
1457  char *histogram_dir;
1458  char *histogram_fn;
1459 
1461  "NSE",
1462  "HISTOGRAM_DIR",
1463  &histogram_dir))
1464  {
1465  GNUNET_assert (
1466  0 < GNUNET_asprintf (&histogram_fn, "%s/timestamps", histogram_dir));
1467  GNUNET_free (histogram_dir);
1468  histogram = GNUNET_BIO_write_open_file (histogram_fn);
1469  if (NULL == histogram)
1471  "Unable to open histogram file `%s'\n",
1472  histogram_fn);
1473  GNUNET_free (histogram_fn);
1474  }
1475  logger_test = GNUNET_CLIENT_service_test ("testbed-logger",
1476  cfg,
1478  &status_cb,
1479  NULL);
1480  }
1481 #endif
1482 
1485  GNUNET_assert (NULL != pk);
1486  my_private_key = pk;
1488  if (GNUNET_OK !=
1489  GNUNET_CONFIGURATION_get_value_filename (cfg, "NSE", "PROOFFILE", &proof))
1490  {
1491  GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, "NSE", "PROOFFILE");
1493  my_private_key = NULL;
1495  return;
1496  }
1497  if ((GNUNET_YES != GNUNET_DISK_file_test (proof)) ||
1498  (sizeof(my_proof) !=
1500  my_proof = 0;
1501  GNUNET_free (proof);
1502  proof_task =
1504  &find_proof,
1505  NULL);
1506 
1509  /* Connect to core service and register core handlers */
1510  core_api =
1511  GNUNET_CORE_connect (cfg, /* Main configuration */
1512  NULL, /* Closure passed to functions */
1513  &core_init, /* Call core_init once connected */
1514  &handle_core_connect, /* Handle connects */
1515  &handle_core_disconnect, /* Handle disconnects */
1516  core_handlers); /* Register these handlers */
1517  if (NULL == core_api)
1518  {
1520  return;
1521  }
1522  stats = GNUNET_STATISTICS_create ("nse", cfg);
1523 }
1524 
1525 
1534 static void *
1536  struct GNUNET_SERVICE_Client *c,
1537  struct GNUNET_MQ_Handle *mq)
1538 {
1539  (void) cls;
1540  (void) mq;
1541  return c;
1542 }
1543 
1544 
1552 static void
1554  struct GNUNET_SERVICE_Client *c,
1555  void *internal_cls)
1556 {
1557  (void) cls;
1558  GNUNET_assert (c == internal_cls);
1559 }
1560 
1561 
1567  &run,
1570  NULL,
1573  struct GNUNET_MessageHeader,
1574  NULL),
1576 
1577 
1578 #if defined(__linux__) && defined(__GLIBC__)
1579 #include <malloc.h>
1580 
1584 void __attribute__ ((constructor))
1585 GNUNET_ARM_memory_init ()
1586 {
1587  mallopt (M_TRIM_THRESHOLD, 4 * 1024);
1588  mallopt (M_TOP_PAD, 1 * 1024);
1589  malloc_trim (0);
1590 }
1591 
1592 
1593 #endif
1594 
1595 
1596 /* 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 int ret
Return value of the commandline.
Definition: gnunet-abd.c:81
static int start
Set if we are to start default services (including ARM).
Definition: gnunet-arm.c:39
struct GNUNET_HashCode key
The key used in the DHT.
static ogg_stream_state os
Ogg stream state.
uint16_t status
See PRISM_STATUS_*-constants.
enum RadiotapType __attribute__
struct GNUNET_IDENTITY_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 * value
Value of the record to add/remove.
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:48
static struct GNUNET_TIME_Relative delay
When should dkg communication start?
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.
static int 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.
#define HISTORY_SIZE
Over how many values do we calculate the weighted average?
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 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 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 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 calcualations.
static unsigned int count_leading_zeroes(const struct GNUNET_HashCode *hash)
Count the leading zeroes in hash.
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_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 void * handle_core_connect(void *cls, const struct GNUNET_PeerIdentity *peer, struct GNUNET_MQ_Handle *mq)
Method called whenever a peer connects.
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 char buf[2048]
static struct GNUNET_SCHEDULER_Task * t
Main task.
#define GNUNET_NETWORK_STRUCT_BEGIN
Define as empty, GNUNET_PACKED should suffice, but this won't work on W32.
#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:53
@ GNUNET_SCHEDULER_PRIORITY_IDLE
Run when otherwise idle.
#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:74
#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_OK
Definition: gnunet_common.h:95
@ GNUNET_YES
Definition: gnunet_common.h:97
@ GNUNET_NO
Definition: gnunet_common.h:94
#define GNUNET_PACKED
gcc-ism to get packed structs.
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:41
int GNUNET_BIO_write_close(struct GNUNET_BIO_WriteHandle *h, char **emsg)
Close an IO handle.
Definition: bio.c:608
int GNUNET_BIO_write_int64(struct GNUNET_BIO_WriteHandle *h, const char *what, int64_t i)
Write an (u)int64_t.
Definition: bio.c:956
struct GNUNET_BIO_WriteHandle * GNUNET_BIO_write_open_file(const char *fn)
Open a file for writing.
Definition: bio.c:559
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:692
void GNUNET_CORE_disconnect(struct GNUNET_CORE_Handle *handle)
Disconnect from the core service.
Definition: core_api.c:730
int 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:682
uint64_t GNUNET_CRYPTO_random_u64(enum GNUNET_CRYPTO_Quality mode, uint64_t max)
Random on unsigned 64-bit values.
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.
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:197
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:599
uint32_t GNUNET_CRYPTO_random_u32(enum GNUNET_CRYPTO_Quality mode, uint32_t i)
Produce a random value.
@ 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:1085
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
unsigned int GNUNET_CRYPTO_hash_matching_bits(const struct GNUNET_HashCode *first, const struct GNUNET_HashCode *second)
Determine how many low order bits match in two struct GNUNET_HashCodes.
Definition: crypto_hash.c:189
int GNUNET_CRYPTO_hash_get_bit_ltr(const struct GNUNET_HashCode *code, unsigned int bit)
Obtain a bit from a hashcode.
Definition: crypto_hash.c:171
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).
int 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.
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.
@ 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...
#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:137
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:1083
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:355
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
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:189
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:666
struct GNUNET_NotificationContext * GNUNET_notification_context_create(unsigned int queue_length)
Create a new notification context.
Definition: nc.c:121
#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:160
#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:531
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:1296
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:1199
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:1223
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:1331
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:1246
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:972
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:1269
struct GNUNET_MQ_Handle * GNUNET_SERVICE_client_get_mq(struct GNUNET_SERVICE_Client *c)
Obtain the message queue of c.
Definition: service.c:2438
void GNUNET_SERVICE_client_continue(struct GNUNET_SERVICE_Client *c)
Continue receiving further messages from the given client.
Definition: service.c:2244
@ GNUNET_SERVICE_OPTION_NONE
Use defaults.
#define GNUNET_SIGNATURE_PURPOSE_NSE_SEND
Signature of a network size estimate message.
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).
void GNUNET_TESTBED_LOGGER_flush(struct GNUNET_TESTBED_LOGGER_Handle *h, GNUNET_TESTBED_LOGGER_FlushCompletion cb, void *cb_cls)
Flush the buffered data to the logger service.
struct GNUNET_TESTBED_LOGGER_Handle * GNUNET_TESTBED_LOGGER_connect(const struct GNUNET_CONFIGURATION_Handle *cfg)
Connect to the testbed logger service.
void GNUNET_TESTBED_LOGGER_write(struct GNUNET_TESTBED_LOGGER_Handle *h, const void *data, size_t size)
Send data to be logged to the logger service.
void GNUNET_TESTBED_LOGGER_disconnect(struct GNUNET_TESTBED_LOGGER_Handle *h)
Disconnect from the logger service.
#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:232
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:86
const char * GNUNET_STRINGS_absolute_time_to_string(struct GNUNET_TIME_Absolute t)
Like asctime, except for GNUnet time.
Definition: strings.c:604
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:542
#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:277
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:557
struct GNUNET_TIME_AbsoluteNBO GNUNET_TIME_absolute_hton(struct GNUNET_TIME_Absolute a)
Convert absolute time to network byte order.
Definition: time.c:464
Common type definitions for the network size estimation service and API.
static unsigned int size
Size of the "table".
Definition: peer.c:67
#define _(String)
GNU gettext support macro.
Definition: platform.h:177
Handle for buffered writing.
Definition: bio.c:517
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:86
Message handler for a specific message type.
Header for all communications.
uint16_t type
The type of the message (GNUNET_MESSAGE_TYPE_XXXX), in big-endian format.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
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:76
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:135
Handle to a client that is connected to a service.
Definition: service.c:251
Handle to a service.
Definition: service.c:117
Handle for the service.
Connection handle for the logger 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...
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.