2 This file is part of GNUnet.
3 (C) 2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file identity/gnunet-service-identity.c
23 * @brief identity management service
24 * @author Christian Grothoff
26 * The purpose of this service is to manage private keys that
27 * represent the various egos/pseudonyms/identities of a GNUnet user.
30 * - auto-initialze default egos; maybe trigger default
31 * initializations (such as gnunet-gns-import.sh?)
34 #include "gnunet_util_lib.h"
35 #include "gnunet_constants.h"
36 #include "gnunet_protocols.h"
37 #include "gnunet_statistics_service.h"
38 #include "gnunet_identity_service.h"
43 * Information we keep about each ego.
49 * We keep egos in a DLL.
54 * We keep egos in a DLL.
59 * Private key of the ego.
61 struct GNUNET_CRYPTO_EccPrivateKey *pk;
64 * String identifier for the ego.
72 * Handle to our current configuration.
74 static const struct GNUNET_CONFIGURATION_Handle *cfg;
77 * Handle to subsystem configuration which for each subsystem contains
78 * the name of the default ego.
80 static struct GNUNET_CONFIGURATION_Handle *subsystem_cfg;
83 * Handle to the statistics service.
85 static struct GNUNET_STATISTICS_Handle *stats;
88 * Notification context, simplifies client broadcasts.
90 static struct GNUNET_SERVER_NotificationContext *nc;
93 * Directory where we store the identities.
95 static char *ego_directory;
98 * Configuration file name where subsystem information is kept.
100 static char *subsystem_cfg_file;
103 * Head of DLL of all egos.
105 static struct Ego *ego_head;
108 * Tail of DLL of all egos.
110 static struct Ego *ego_tail;
114 * Get the name of the file we use to store a given ego.
116 * @param ego ego for which we need the filename
117 * @return full filename for the given ego
120 get_ego_filename (struct Ego *ego)
124 GNUNET_asprintf (&filename,
134 * Task run during shutdown.
140 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
146 GNUNET_SERVER_notification_context_destroy (nc);
151 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
154 GNUNET_CONFIGURATION_destroy (subsystem_cfg);
155 subsystem_cfg = NULL;
156 GNUNET_free (subsystem_cfg_file);
157 subsystem_cfg_file = NULL;
158 GNUNET_free (ego_directory);
159 ego_directory = NULL;
160 while (NULL != (e = ego_head))
162 GNUNET_CONTAINER_DLL_remove (ego_head, ego_tail, e);
170 * Send a result code back to the client.
172 * @param client client that should receive the result code
173 * @param result_code code to transmit
174 * @param emsg error message to include (or NULL for none)
177 send_result_code (struct GNUNET_SERVER_Client *client,
178 uint32_t result_code,
181 struct GNUNET_IDENTITY_ResultCodeMessage *rcm;
187 elen = strlen (emsg) + 1;
188 rcm = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_ResultCodeMessage) + elen);
189 rcm->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_RESULT_CODE);
190 rcm->header.size = htons (sizeof (struct GNUNET_IDENTITY_ResultCodeMessage) + elen);
191 rcm->result_code = htonl (result_code);
192 memcpy (&rcm[1], emsg, elen);
193 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
194 "Sending result %d (%s) to client\n",
197 GNUNET_SERVER_notification_context_unicast (nc, client, &rcm->header, GNUNET_NO);
203 * Create an update message with information about the current state of an ego.
205 * @param ego ego to create message for
206 * @return corresponding update message
208 static struct GNUNET_IDENTITY_UpdateMessage *
209 create_update_message (struct Ego *ego)
211 struct GNUNET_IDENTITY_UpdateMessage *um;
214 name_len = (NULL == ego->identifier) ? 0 : (strlen (ego->identifier) + 1);
215 um = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_UpdateMessage) + name_len);
216 um->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_UPDATE);
217 um->header.size = htons (sizeof (struct GNUNET_IDENTITY_UpdateMessage) + name_len);
218 um->name_len = htons (name_len);
219 um->end_of_list = htons (GNUNET_NO);
220 um->private_key = *ego->pk;
221 memcpy (&um[1], ego->identifier, name_len);
227 * Create a set default message with information about the current state of an ego.
229 * @param ego ego to create message for
230 * @param servicename name of the service to provide in the message
231 * @return corresponding set default message
233 static struct GNUNET_IDENTITY_SetDefaultMessage *
234 create_set_default_message (struct Ego *ego,
235 const char *servicename)
237 struct GNUNET_IDENTITY_SetDefaultMessage *sdm;
240 name_len = (NULL == servicename) ? 0 : (strlen (servicename) + 1);
241 sdm = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_SetDefaultMessage) + name_len);
242 sdm->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_SET_DEFAULT);
243 sdm->header.size = htons (sizeof (struct GNUNET_IDENTITY_SetDefaultMessage) + name_len);
244 sdm->name_len = htons (name_len);
245 sdm->reserved = htons (0);
246 sdm->private_key = *ego->pk;
247 memcpy (&sdm[1], servicename, name_len);
253 * Handler for START message from client, sends information
254 * about all identities to the client immediately and
255 * adds the client to the notification context for future
259 * @param client who sent the message
260 * @param message the message received
263 handle_start_message (void *cls, struct GNUNET_SERVER_Client *client,
264 const struct GNUNET_MessageHeader *message)
266 struct GNUNET_IDENTITY_UpdateMessage *um;
267 struct GNUNET_IDENTITY_UpdateMessage ume;
270 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
271 "Received START message from client\n");
272 GNUNET_SERVER_notification_context_add (nc, client);
273 for (ego = ego_head; NULL != ego; ego = ego->next)
275 um = create_update_message (ego);
276 GNUNET_SERVER_notification_context_unicast (nc, client, &um->header, GNUNET_NO);
279 memset (&ume, 0, sizeof (ume));
280 ume.header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_UPDATE);
281 ume.header.size = htons (sizeof (struct GNUNET_IDENTITY_UpdateMessage));
282 ume.end_of_list = htons (GNUNET_YES);
283 ume.name_len = htons (0);
284 GNUNET_SERVER_notification_context_unicast (nc, client, &ume.header, GNUNET_NO);
285 GNUNET_SERVER_receive_done (client, GNUNET_OK);
290 * Handler for GET_DEFAULT message from client, returns
291 * default identity for some service.
294 * @param client who sent the message
295 * @param message the message received
298 handle_get_default_message (void *cls, struct GNUNET_SERVER_Client *client,
299 const struct GNUNET_MessageHeader *message)
301 const struct GNUNET_IDENTITY_GetDefaultMessage *gdm;
302 struct GNUNET_IDENTITY_SetDefaultMessage *sdm;
309 size = ntohs (message->size);
310 if (size <= sizeof (struct GNUNET_IDENTITY_GetDefaultMessage))
313 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
316 gdm = (const struct GNUNET_IDENTITY_GetDefaultMessage *) message;
317 name = (const char *) &gdm[1];
318 name_len = ntohs (gdm->name_len);
319 if ( (name_len + sizeof (struct GNUNET_IDENTITY_GetDefaultMessage) != size) ||
320 (0 != ntohs (gdm->reserved)) ||
321 ('\0' != name[name_len - 1]) )
324 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
328 "Received GET_DEFAULT for service `%s' from client\n",
331 GNUNET_CONFIGURATION_get_value_string (subsystem_cfg,
333 "DEFAULT_IDENTIFIER",
336 send_result_code (client, 1, gettext_noop ("no default known"));
337 GNUNET_SERVER_receive_done (client, GNUNET_OK);
340 for (ego = ego_head; NULL != ego; ego = ego->next)
342 if (0 == strcmp (ego->identifier,
345 sdm = create_set_default_message (ego,
347 GNUNET_SERVER_notification_context_broadcast (nc, &sdm->header, GNUNET_NO);
349 GNUNET_SERVER_receive_done (client, GNUNET_OK);
353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
354 "Failed to find ego `%s'\n",
356 send_result_code (client, 1,
357 gettext_noop ("default configured, but ego unknown (internal error)"));
358 GNUNET_SERVER_receive_done (client, GNUNET_OK);
363 * Compare the given two private keys for equality.
365 * @param pk1 one private key
366 * @param pk2 another private key
367 * @return 0 if the keys are equal
370 key_cmp (const struct GNUNET_CRYPTO_EccPrivateKey *pk1,
371 const struct GNUNET_CRYPTO_EccPrivateKey *pk2)
373 return memcmp (pk1, pk2, sizeof (struct GNUNET_CRYPTO_EccPrivateKey));
378 * Handler for SET_DEFAULT message from client, updates
379 * default identity for some service.
382 * @param client who sent the message
383 * @param message the message received
386 handle_set_default_message (void *cls, struct GNUNET_SERVER_Client *client,
387 const struct GNUNET_MessageHeader *message)
389 const struct GNUNET_IDENTITY_SetDefaultMessage *sdm;
395 size = ntohs (message->size);
396 if (size <= sizeof (struct GNUNET_IDENTITY_SetDefaultMessage))
399 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
402 sdm = (const struct GNUNET_IDENTITY_SetDefaultMessage *) message;
403 name_len = ntohs (sdm->name_len);
404 GNUNET_break (0 == ntohs (sdm->reserved));
405 if (name_len + sizeof (struct GNUNET_IDENTITY_SetDefaultMessage) != size)
408 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
411 str = (const char *) &sdm[1];
412 if ('\0' != str[name_len - 1])
415 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
418 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
419 "Received SET_DEFAULT for service `%s' from client\n",
421 for (ego = ego_head; NULL != ego; ego = ego->next)
423 if (0 == key_cmp (ego->pk,
426 GNUNET_CONFIGURATION_set_value_string (subsystem_cfg,
428 "DEFAULT_IDENTIFIER",
431 GNUNET_CONFIGURATION_write (subsystem_cfg,
433 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
434 _("Failed to write subsystem default identifier map to `%s'.\n"),
436 send_result_code (client, 0, NULL);
437 GNUNET_SERVER_receive_done (client, GNUNET_OK);
441 send_result_code (client, 1, _("Unknown ego specified for service (internal error)"));
442 GNUNET_SERVER_receive_done (client, GNUNET_OK);
447 * Send an updated message for the given ego to all listeners.
449 * @param ego ego to send the update for
452 notify_listeners (struct Ego *ego)
454 struct GNUNET_IDENTITY_UpdateMessage *um;
456 um = create_update_message (ego);
457 GNUNET_SERVER_notification_context_broadcast (nc, &um->header, GNUNET_NO);
463 * Handler for CREATE message from client, creates
467 * @param client who sent the message
468 * @param message the message received
471 handle_create_message (void *cls, struct GNUNET_SERVER_Client *client,
472 const struct GNUNET_MessageHeader *message)
474 const struct GNUNET_IDENTITY_CreateRequestMessage *crm;
481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
482 "Received CREATE message from client\n");
483 size = ntohs (message->size);
484 if (size <= sizeof (struct GNUNET_IDENTITY_CreateRequestMessage))
487 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
490 crm = (const struct GNUNET_IDENTITY_CreateRequestMessage *) message;
491 name_len = ntohs (crm->name_len);
492 GNUNET_break (0 == ntohs (crm->reserved));
493 if (name_len + sizeof (struct GNUNET_IDENTITY_CreateRequestMessage) != size)
496 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
499 str = (const char *) &crm[1];
500 if ('\0' != str[name_len - 1])
503 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
506 for (ego = ego_head; NULL != ego; ego = ego->next)
508 if (0 == strcmp (ego->identifier,
511 send_result_code (client, 1, gettext_noop ("identifier already in use for another ego"));
512 GNUNET_SERVER_receive_done (client, GNUNET_OK);
516 ego = GNUNET_new (struct Ego);
517 ego->pk = GNUNET_new (struct GNUNET_CRYPTO_EccPrivateKey);
518 *ego->pk = crm->private_key;
519 ego->identifier = GNUNET_strdup (str);
520 GNUNET_CONTAINER_DLL_insert (ego_head,
523 send_result_code (client, 0, NULL);
524 fn = get_ego_filename (ego);
525 (void) GNUNET_DISK_directory_create_for_file (fn);
526 if (sizeof (struct GNUNET_CRYPTO_EccPrivateKey) !=
527 GNUNET_DISK_fn_write (fn,
529 sizeof (struct GNUNET_CRYPTO_EccPrivateKey),
530 GNUNET_DISK_PERM_USER_READ |
531 GNUNET_DISK_PERM_USER_WRITE))
532 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
535 notify_listeners (ego);
536 GNUNET_SERVER_receive_done (client, GNUNET_OK);
541 * Closure for 'handle_ego_rename'.
548 const char *old_name;
553 const char *new_name;
558 * An ego was renamed; rename it in all subsystems where it is
559 * currently set as the default.
561 * @param cls the 'struct RenameContext'
562 * @param section a section in the configuration to process
565 handle_ego_rename (void *cls,
568 struct RenameContext *rc = cls;
572 GNUNET_CONFIGURATION_get_value_string (subsystem_cfg,
574 "DEFAULT_IDENTIFIER",
577 if (0 != strcmp (id, rc->old_name))
582 GNUNET_CONFIGURATION_set_value_string (subsystem_cfg,
584 "DEFAULT_IDENTIFIER",
591 * Handler for RENAME message from client, creates
595 * @param client who sent the message
596 * @param message the message received
599 handle_rename_message (void *cls, struct GNUNET_SERVER_Client *client,
600 const struct GNUNET_MessageHeader *message)
602 const struct GNUNET_IDENTITY_RenameMessage *rm;
604 uint16_t old_name_len;
605 uint16_t new_name_len;
607 const char *old_name;
608 const char *new_name;
609 struct RenameContext rename_ctx;
613 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
614 "Received RENAME message from client\n");
615 size = ntohs (message->size);
616 if (size <= sizeof (struct GNUNET_IDENTITY_RenameMessage))
619 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
622 rm = (const struct GNUNET_IDENTITY_RenameMessage *) message;
623 old_name_len = ntohs (rm->old_name_len);
624 new_name_len = ntohs (rm->new_name_len);
625 old_name = (const char *) &rm[1];
626 new_name = &old_name[old_name_len];
627 if ( (old_name_len + new_name_len + sizeof (struct GNUNET_IDENTITY_RenameMessage) != size) ||
628 ('\0' != old_name[old_name_len - 1]) ||
629 ('\0' != new_name[new_name_len - 1]) )
632 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
636 /* check if new name is already in use */
637 for (ego = ego_head; NULL != ego; ego = ego->next)
639 if (0 == strcmp (ego->identifier,
642 send_result_code (client, 1, gettext_noop ("target name already exists"));
643 GNUNET_SERVER_receive_done (client, GNUNET_OK);
648 /* locate old name and, if found, perform rename */
649 for (ego = ego_head; NULL != ego; ego = ego->next)
651 if (0 == strcmp (ego->identifier,
654 fn_old = get_ego_filename (ego);
655 GNUNET_free (ego->identifier);
656 rename_ctx.old_name = old_name;
657 rename_ctx.new_name = new_name;
658 GNUNET_CONFIGURATION_iterate_sections (subsystem_cfg,
662 GNUNET_CONFIGURATION_write (subsystem_cfg,
664 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
665 _("Failed to write subsystem default identifier map to `%s'.\n"),
667 ego->identifier = GNUNET_strdup (new_name);
668 fn_new = get_ego_filename (ego);
669 if (0 != RENAME (fn_old, fn_new))
670 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "rename", fn_old);
671 GNUNET_free (fn_old);
672 GNUNET_free (fn_new);
673 notify_listeners (ego);
674 send_result_code (client, 0, NULL);
675 GNUNET_SERVER_receive_done (client, GNUNET_OK);
680 /* failed to locate old name */
681 send_result_code (client, 1, gettext_noop ("no matching ego found"));
682 GNUNET_SERVER_receive_done (client, GNUNET_OK);
687 * An ego was removed, remove it from all subsystems where it is
688 * currently set as the default.
690 * @param cls name of the removed ego (const char *)
691 * @param section a section in the configuration to process
694 handle_ego_delete (void *cls,
697 const char *identifier = cls;
701 GNUNET_CONFIGURATION_get_value_string (subsystem_cfg,
703 "DEFAULT_IDENTIFIER",
706 if (0 != strcmp (id, identifier))
711 GNUNET_CONFIGURATION_set_value_string (subsystem_cfg,
713 "DEFAULT_IDENTIFIER",
720 * Handler for DELETE message from client, creates
724 * @param client who sent the message
725 * @param message the message received
728 handle_delete_message (void *cls, struct GNUNET_SERVER_Client *client,
729 const struct GNUNET_MessageHeader *message)
731 const struct GNUNET_IDENTITY_DeleteMessage *dm;
738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
739 "Received DELETE message from client\n");
740 size = ntohs (message->size);
741 if (size <= sizeof (struct GNUNET_IDENTITY_DeleteMessage))
744 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
747 dm = (const struct GNUNET_IDENTITY_DeleteMessage *) message;
748 name = (const char *) &dm[1];
749 name_len = ntohs (dm->name_len);
750 if ( (name_len + sizeof (struct GNUNET_IDENTITY_DeleteMessage) != size) ||
751 (0 != ntohs (dm->reserved)) ||
752 ('\0' != name[name_len - 1]) )
755 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
758 for (ego = ego_head; NULL != ego; ego = ego->next)
760 if (0 == strcmp (ego->identifier,
763 GNUNET_CONTAINER_DLL_remove (ego_head,
766 GNUNET_CONFIGURATION_iterate_sections (subsystem_cfg,
770 GNUNET_CONFIGURATION_write (subsystem_cfg,
772 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
773 _("Failed to write subsystem default identifier map to `%s'.\n"),
775 fn = get_ego_filename (ego);
776 if (0 != UNLINK (fn))
777 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink", fn);
779 GNUNET_free (ego->identifier);
780 ego->identifier = NULL;
781 notify_listeners (ego);
782 GNUNET_free (ego->pk);
784 send_result_code (client, 0, NULL);
785 GNUNET_SERVER_receive_done (client, GNUNET_OK);
790 send_result_code (client, 1, gettext_noop ("no matching ego found"));
791 GNUNET_SERVER_receive_done (client, GNUNET_OK);
796 * Process the given file from the "EGODIR". Parses the file
797 * and creates the respective 'struct Ego' in memory.
800 * @param filename name of the file to parse
801 * @return GNUNET_OK to continue to iterate,
802 * GNUNET_NO to stop iteration with no error,
803 * GNUNET_SYSERR to abort iteration with error!
806 process_ego_file (void *cls,
807 const char *filename)
812 fn = strrchr (filename, (int) DIR_SEPARATOR);
818 ego = GNUNET_new (struct Ego);
819 ego->pk = GNUNET_CRYPTO_ecc_key_create_from_file (filename);
823 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
824 _("Failed to parse ego information in `%s'\n"),
828 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
831 ego->identifier = GNUNET_strdup (fn + 1);
832 GNUNET_CONTAINER_DLL_insert (ego_head,
840 * Handle network size estimate clients.
843 * @param server the initialized server
844 * @param c configuration to use
848 struct GNUNET_SERVER_Handle *server,
849 const struct GNUNET_CONFIGURATION_Handle *c)
851 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
852 {&handle_start_message, NULL,
853 GNUNET_MESSAGE_TYPE_IDENTITY_START, sizeof (struct GNUNET_MessageHeader)},
854 {&handle_get_default_message, NULL,
855 GNUNET_MESSAGE_TYPE_IDENTITY_GET_DEFAULT, 0},
856 {&handle_set_default_message, NULL,
857 GNUNET_MESSAGE_TYPE_IDENTITY_SET_DEFAULT, 0},
858 {&handle_create_message, NULL,
859 GNUNET_MESSAGE_TYPE_IDENTITY_CREATE, 0},
860 {&handle_rename_message, NULL,
861 GNUNET_MESSAGE_TYPE_IDENTITY_RENAME, 0},
862 {&handle_delete_message, NULL,
863 GNUNET_MESSAGE_TYPE_IDENTITY_DELETE, 0},
869 GNUNET_CONFIGURATION_get_value_filename (cfg, "identity",
873 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, "identity", "EGODIR");
874 GNUNET_SCHEDULER_shutdown ();
878 GNUNET_CONFIGURATION_get_value_filename (cfg, "identity",
880 &subsystem_cfg_file))
882 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, "identity", "SUBSYSTEM_CFG");
883 GNUNET_SCHEDULER_shutdown ();
886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
887 "Loading subsystem configuration `%s'\n",
889 subsystem_cfg = GNUNET_CONFIGURATION_create ();
891 GNUNET_DISK_file_test (subsystem_cfg_file)) &&
893 GNUNET_CONFIGURATION_parse (subsystem_cfg,
894 subsystem_cfg_file)) )
896 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
897 _("Failed to parse subsystem identity configuration file `%s'\n"),
899 GNUNET_SCHEDULER_shutdown ();
902 stats = GNUNET_STATISTICS_create ("identity", cfg);
903 GNUNET_SERVER_add_handlers (server, handlers);
904 nc = GNUNET_SERVER_notification_context_create (server, 1);
906 GNUNET_DISK_directory_create (ego_directory))
908 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
909 _("Failed to create directory `%s' for storing egos\n"),
912 GNUNET_DISK_directory_scan (ego_directory,
915 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
921 * The main function for the network size estimation service.
923 * @param argc number of arguments from the command line
924 * @param argv command line arguments
925 * @return 0 ok, 1 on error
928 main (int argc, char *const *argv)
931 GNUNET_SERVICE_run (argc, argv, "identity",
932 GNUNET_SERVICE_OPTION_NONE,
933 &run, NULL)) ? 0 : 1;
937 /* end of gnunet-service-identity.c */