2 This file is part of GNUnet.
3 Copyright (C) 2011-2013 GNUnet e.V.
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., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
21 * @file gns/gnunet-service-gns.c
22 * @brief GNU Name System (main service)
23 * @author Martin Schanzenbach
24 * @author Christian Grothoff
27 #include "gnunet_util_lib.h"
28 #include "gnunet_dns_service.h"
29 #include "gnunet_dnsparser_lib.h"
30 #include "gnunet_dht_service.h"
31 #include "gnunet_namecache_service.h"
32 #include "gnunet_namestore_service.h"
33 #include "gnunet_identity_service.h"
34 #include "gnunet_gns_service.h"
35 #include "gnunet_statistics_service.h"
37 #include "gnunet-service-gns_resolver.h"
38 #include "gnunet-service-gns_shorten.h"
39 #include "gnunet-service-gns_interceptor.h"
40 #include "gnunet_protocols.h"
43 * The initial interval in milliseconds btween puts in
46 #define INITIAL_PUT_INTERVAL GNUNET_TIME_UNIT_MILLISECONDS
49 * The upper bound for the zone iteration interval in milliseconds
51 #define MINIMUM_ZONE_ITERATION_INTERVAL GNUNET_TIME_UNIT_SECONDS
54 * The default put interval for the zone iteration. In case
57 #define DEFAULT_ZONE_PUBLISH_TIME_WINDOW GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 4)
60 * The factor the current zone iteration interval is divided by for each
61 * additional new record
63 #define LATE_ITERATION_SPEEDUP_FACTOR 2
66 * How long until a DHT PUT attempt should time out?
68 #define DHT_OPERATION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 60)
71 * What replication level do we use for DHT PUT operations?
73 #define DHT_GNS_REPLICATION_LEVEL 5
77 * Handle to a lookup operation from api
79 struct ClientLookupHandle
83 * We keep these in a DLL.
85 struct ClientLookupHandle *next;
88 * We keep these in a DLL.
90 struct ClientLookupHandle *prev;
93 * Handle to the requesting client
95 struct GNUNET_SERVER_Client *client;
98 * Active handle for the lookup.
100 struct GNS_ResolverHandle *lookup;
111 * Handle for DHT PUT activity triggered from the namestore monitor.
113 struct MonitorActivity
118 struct MonitorActivity *next;
123 struct MonitorActivity *prev;
126 * Handle for the DHT PUT operation.
128 struct GNUNET_DHT_PutHandle *ph;
133 * Our handle to the DHT
135 static struct GNUNET_DHT_Handle *dht_handle;
138 * Active DHT put operation (or NULL)
140 static struct GNUNET_DHT_PutHandle *active_put;
143 * Our handle to the namestore service
145 static struct GNUNET_NAMESTORE_Handle *namestore_handle;
148 * Our handle to the namecache service
150 static struct GNUNET_NAMECACHE_Handle *namecache_handle;
153 * Our handle to the identity service
155 static struct GNUNET_IDENTITY_Handle *identity_handle;
158 * Our handle to the identity operation to find the master zone
159 * for intercepted queries.
161 static struct GNUNET_IDENTITY_Operation *identity_op;
164 * Handle to iterate over our authoritative zone in namestore
166 static struct GNUNET_NAMESTORE_ZoneIterator *namestore_iter;
169 * Handle to monitor namestore changes to instant propagation.
171 static struct GNUNET_NAMESTORE_ZoneMonitor *zmon;
174 * Our notification context.
176 static struct GNUNET_SERVER_NotificationContext *nc;
181 static struct ClientLookupHandle *clh_head;
186 static struct ClientLookupHandle *clh_tail;
189 * Head of monitor activities; kept in a DLL.
191 static struct MonitorActivity *ma_head;
194 * Tail of monitor activities; kept in a DLL.
196 static struct MonitorActivity *ma_tail;
199 * Useful for zone update for DHT put
201 static unsigned long long num_public_records;
204 * Last seen record count
206 static unsigned long long last_num_public_records;
209 * Minimum relative expiration time of records seem during the current
212 static struct GNUNET_TIME_Relative min_relative_record_time;
215 * Zone iteration PUT interval.
217 static struct GNUNET_TIME_Relative put_interval;
220 * Default time window for zone iteration
222 static struct GNUNET_TIME_Relative zone_publish_time_window_default;
225 * Time window for zone iteration, adjusted based on relative record
226 * expiration times in our zone.
228 static struct GNUNET_TIME_Relative zone_publish_time_window;
233 static struct GNUNET_SCHEDULER_Task * zone_publish_task;
236 * #GNUNET_YES if zone has never been published before
238 static int first_zone_iteration;
241 * #GNUNET_YES if ipv6 is supported
243 static int v6_enabled;
246 * #GNUNET_YES if ipv4 is supported
248 static int v4_enabled;
251 * Handle to the statistics service
253 static struct GNUNET_STATISTICS_Handle *statistics;
257 * Task run during shutdown.
263 shutdown_task (void *cls)
265 struct ClientLookupHandle *clh;
266 struct MonitorActivity *ma;
268 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
272 GNUNET_SERVER_notification_context_destroy (nc);
275 while (NULL != (clh = clh_head))
277 GNUNET_SERVER_client_set_user_context (clh->client, NULL);
278 GNS_resolver_lookup_cancel (clh->lookup);
279 GNUNET_CONTAINER_DLL_remove (clh_head, clh_tail, clh);
283 GNS_interceptor_done ();
284 if (NULL != identity_op)
286 GNUNET_IDENTITY_cancel (identity_op);
289 if (NULL != identity_handle)
291 GNUNET_IDENTITY_disconnect (identity_handle);
292 identity_handle = NULL;
294 GNS_resolver_done ();
296 while (NULL != (ma = ma_head))
298 GNUNET_DHT_put_cancel (ma->ph);
299 GNUNET_CONTAINER_DLL_remove (ma_head,
304 if (NULL != statistics)
306 GNUNET_STATISTICS_destroy (statistics, GNUNET_NO);
309 if (NULL != zone_publish_task)
311 GNUNET_SCHEDULER_cancel (zone_publish_task);
312 zone_publish_task = NULL;
314 if (NULL != namestore_iter)
316 GNUNET_NAMESTORE_zone_iteration_stop (namestore_iter);
317 namestore_iter = NULL;
321 GNUNET_NAMESTORE_zone_monitor_stop (zmon);
324 if (NULL != namestore_handle)
326 GNUNET_NAMESTORE_disconnect (namestore_handle);
327 namestore_handle = NULL;
329 if (NULL != namecache_handle)
331 GNUNET_NAMECACHE_disconnect (namecache_handle);
332 namecache_handle = NULL;
334 if (NULL != active_put)
336 GNUNET_DHT_put_cancel (active_put);
339 if (NULL != dht_handle)
341 GNUNET_DHT_disconnect (dht_handle);
348 * Method called periodically that triggers iteration over authoritative records
353 publish_zone_dht_next (void *cls)
355 zone_publish_task = NULL;
356 GNUNET_NAMESTORE_zone_iterator_next (namestore_iter);
361 * Periodically iterate over our zone and store everything in dht
366 publish_zone_dht_start (void *cls);
370 * Continuation called from DHT once the PUT operation is done.
372 * @param cls closure, NULL if called from regular iteration,
373 * `struct MonitorActivity` if called from #handle_monitor_event.
374 * @param success #GNUNET_OK on success
377 dht_put_continuation (void *cls,
380 struct MonitorActivity *ma = cls;
381 struct GNUNET_TIME_Relative next_put_interval;
383 num_public_records++;
387 if ( (num_public_records > last_num_public_records) &&
388 (GNUNET_NO == first_zone_iteration) )
390 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
391 "Last record count was lower than current record count. Reducing interval.\n");
392 put_interval = GNUNET_TIME_relative_divide (zone_publish_time_window,
394 next_put_interval = GNUNET_TIME_relative_divide (put_interval,
395 LATE_ITERATION_SPEEDUP_FACTOR);
398 next_put_interval = put_interval;
400 GNUNET_STATISTICS_set (statistics,
401 "Current zone iteration interval (ms)",
402 next_put_interval.rel_value_us / 1000LL,
404 zone_publish_task = GNUNET_SCHEDULER_add_delayed (next_put_interval,
405 &publish_zone_dht_next,
410 GNUNET_CONTAINER_DLL_remove (ma_head,
419 * Convert namestore records from the internal format to that
420 * suitable for publication (removes private records, converts
421 * to absolute expiration time).
423 * @param rd input records
424 * @param rd_count size of the @a rd and @a rd_public arrays
425 * @param rd_public where to write the converted records
426 * @return number of records written to @a rd_public
429 convert_records_for_export (const struct GNUNET_GNSRECORD_Data *rd,
430 unsigned int rd_count,
431 struct GNUNET_GNSRECORD_Data *rd_public)
433 struct GNUNET_TIME_Absolute now;
434 unsigned int rd_public_count;
438 now = GNUNET_TIME_absolute_get ();
439 for (i=0;i<rd_count;i++)
440 if (0 == (rd[i].flags & GNUNET_GNSRECORD_RF_PRIVATE))
442 rd_public[rd_public_count] = rd[i];
443 if (0 != (rd[i].flags & GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION))
445 /* GNUNET_GNSRECORD_block_create will convert to absolute time;
446 we just need to adjust our iteration frequency */
447 min_relative_record_time.rel_value_us =
448 GNUNET_MIN (rd_public[rd_public_count].expiration_time,
449 min_relative_record_time.rel_value_us);
451 else if (rd_public[rd_public_count].expiration_time < now.abs_value_us)
453 /* record already expired, skip it */
458 return rd_public_count;
463 * Store GNS records in the DHT.
465 * @param key key of the zone
466 * @param label label to store under
467 * @param rd_public public record data
468 * @param rd_public_count number of records in @a rd_public
469 * @param pc_arg closure argument to pass to the #dht_put_continuation
470 * @return DHT PUT handle, NULL on error
472 static struct GNUNET_DHT_PutHandle *
473 perform_dht_put (const struct GNUNET_CRYPTO_EcdsaPrivateKey *key,
475 const struct GNUNET_GNSRECORD_Data *rd_public,
476 unsigned int rd_public_count,
479 struct GNUNET_GNSRECORD_Block *block;
480 struct GNUNET_HashCode query;
481 struct GNUNET_TIME_Absolute expire;
483 struct GNUNET_DHT_PutHandle *ret;
485 expire = GNUNET_GNSRECORD_record_get_expiration_time (rd_public_count,
487 block = GNUNET_GNSRECORD_block_create (key,
493 return NULL; /* whoops */
494 block_size = ntohl (block->purpose.size)
495 + sizeof (struct GNUNET_CRYPTO_EcdsaSignature)
496 + sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey);
497 GNUNET_GNSRECORD_query_from_private_key (key,
500 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
501 "Storing %u record(s) for label `%s' in DHT with expiration `%s' under key %s\n",
504 GNUNET_STRINGS_absolute_time_to_string (expire),
505 GNUNET_h2s (&query));
506 ret = GNUNET_DHT_put (dht_handle, &query,
507 DHT_GNS_REPLICATION_LEVEL,
508 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
509 GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
513 &dht_put_continuation,
521 * Function used to put all records successively into the DHT.
523 * @param cls the closure (NULL)
524 * @param key the private key of the authority (ours)
525 * @param label the name of the records, NULL once the iteration is done
526 * @param rd_count the number of records in @a rd
527 * @param rd the record data
530 put_gns_record (void *cls,
531 const struct GNUNET_CRYPTO_EcdsaPrivateKey *key,
533 unsigned int rd_count,
534 const struct GNUNET_GNSRECORD_Data *rd)
536 struct GNUNET_GNSRECORD_Data rd_public[rd_count];
537 unsigned int rd_public_count;
541 /* we're done with one iteration, calculate when to do the next one */
542 namestore_iter = NULL;
543 last_num_public_records = num_public_records;
544 first_zone_iteration = GNUNET_NO;
545 if (0 == num_public_records)
548 * If no records are known (startup) or none present
549 * we can safely set the interval to the value for a single
552 put_interval = zone_publish_time_window;
553 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
554 "No records in namestore database.\n");
558 /* If records are present, next publication is based on the minimum
559 * relative expiration time of the records published divided by 4
561 zone_publish_time_window = GNUNET_TIME_relative_min (
562 GNUNET_TIME_relative_divide (min_relative_record_time, 4),
563 zone_publish_time_window_default);
564 put_interval = GNUNET_TIME_relative_divide (zone_publish_time_window,
567 /* reset for next iteration */
568 min_relative_record_time = GNUNET_TIME_UNIT_FOREVER_REL;
569 put_interval = GNUNET_TIME_relative_max (MINIMUM_ZONE_ITERATION_INTERVAL,
572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
573 "Zone iteration finished. Adjusted zone iteration interval to %s\n",
574 GNUNET_STRINGS_relative_time_to_string (put_interval, GNUNET_YES));
575 GNUNET_STATISTICS_set (statistics,
576 "Current zone iteration interval (in ms)",
577 put_interval.rel_value_us / 1000LL,
579 GNUNET_STATISTICS_update (statistics,
580 "Number of zone iterations",
583 GNUNET_STATISTICS_set (statistics,
584 "Number of public records in DHT",
585 last_num_public_records,
587 if (0 == num_public_records)
588 zone_publish_task = GNUNET_SCHEDULER_add_delayed (put_interval,
589 &publish_zone_dht_start,
592 zone_publish_task = GNUNET_SCHEDULER_add_now (&publish_zone_dht_start,
597 rd_public_count = convert_records_for_export (rd,
601 /* We got a set of records to publish */
602 if (0 == rd_public_count)
604 zone_publish_task = GNUNET_SCHEDULER_add_now (&publish_zone_dht_next,
609 active_put = perform_dht_put (key,
614 if (NULL == active_put)
617 dht_put_continuation (NULL, GNUNET_NO);
623 * Periodically iterate over all zones and store everything in DHT
628 publish_zone_dht_start (void *cls)
630 zone_publish_task = NULL;
632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
633 "Starting DHT zone update!\n");
634 /* start counting again */
635 num_public_records = 0;
636 namestore_iter = GNUNET_NAMESTORE_zone_iteration_start (namestore_handle,
637 NULL, /* All zones */
638 &put_gns_record, NULL );
643 * Process a record that was stored in the namestore
644 * (invoked by the monitor).
646 * @param cls closure, NULL
647 * @param zone private key of the zone; NULL on disconnect
648 * @param label label of the records; NULL on disconnect
649 * @param rd_count number of entries in @a rd array, 0 if label was deleted
650 * @param rd array of records with data to store
653 handle_monitor_event (void *cls,
654 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
656 unsigned int rd_count,
657 const struct GNUNET_GNSRECORD_Data *rd)
659 struct GNUNET_GNSRECORD_Data rd_public[rd_count];
660 unsigned int rd_public_count;
661 struct MonitorActivity *ma;
663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
664 "Received %u records for label `%s' via namestore monitor\n",
667 /* filter out records that are not public, and convert to
668 absolute expiration time. */
669 rd_public_count = convert_records_for_export (rd, rd_count,
671 if (0 == rd_public_count)
672 return; /* nothing to do */
673 ma = GNUNET_new (struct MonitorActivity);
674 ma->ph = perform_dht_put (zone, label,
679 /* PUT failed, do not remember operation */
683 GNUNET_CONTAINER_DLL_insert (ma_head,
689 /* END DHT ZONE PROPAGATION */
693 * Reply to client with the result from our lookup.
695 * @param cls the closure (our client lookup handle)
696 * @param rd_count the number of records in @a rd
697 * @param rd the record data
700 send_lookup_response (void* cls,
702 const struct GNUNET_GNSRECORD_Data *rd)
704 struct ClientLookupHandle *clh = cls;
705 struct GNUNET_GNS_ClientLookupResultMessage *rmsg;
708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
709 "Sending LOOKUP_RESULT message with %u results\n",
710 (unsigned int) rd_count);
712 len = GNUNET_GNSRECORD_records_get_size (rd_count, rd);
713 rmsg = GNUNET_malloc (len + sizeof (struct GNUNET_GNS_ClientLookupResultMessage));
714 rmsg->header.type = htons (GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT);
715 rmsg->header.size = htons (len + sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
716 rmsg->id = clh->request_id;
717 rmsg->rd_count = htonl (rd_count);
718 GNUNET_GNSRECORD_records_serialize (rd_count, rd, len,
720 GNUNET_SERVER_notification_context_unicast (nc,
725 GNUNET_CONTAINER_DLL_remove (clh_head, clh_tail, clh);
726 GNUNET_SERVER_client_set_user_context (clh->client, NULL);
728 GNUNET_STATISTICS_update (statistics,
729 "Completed lookups", 1,
731 GNUNET_STATISTICS_update (statistics,
739 * Handle lookup requests from client
741 * @param cls the closure
742 * @param client the client
743 * @param message the message
746 handle_lookup (void *cls,
747 struct GNUNET_SERVER_Client *client,
748 const struct GNUNET_MessageHeader *message)
750 char name[GNUNET_DNSPARSER_MAX_NAME_LENGTH + 1];
751 struct ClientLookupHandle *clh;
752 char *nameptr = name;
754 const struct GNUNET_CRYPTO_EcdsaPrivateKey *key;
756 const struct GNUNET_GNS_ClientLookupMessage *sh_msg;
758 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
759 "Received LOOKUP message\n");
760 msg_size = ntohs (message->size);
761 if (msg_size < sizeof (struct GNUNET_GNS_ClientLookupMessage))
764 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
767 sh_msg = (const struct GNUNET_GNS_ClientLookupMessage *) message;
768 GNUNET_SERVER_notification_context_add (nc, client);
769 if (GNUNET_YES == ntohs (sh_msg->have_key))
770 key = &sh_msg->shorten_key;
773 utf_in = (const char *) &sh_msg[1];
774 if ( ('\0' != utf_in[msg_size - sizeof (struct GNUNET_GNS_ClientLookupMessage) - 1]) ||
775 (strlen (utf_in) > GNUNET_DNSPARSER_MAX_NAME_LENGTH) )
778 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
781 GNUNET_STRINGS_utf8_tolower (utf_in, nameptr);
782 GNUNET_SERVER_receive_done (client, GNUNET_OK);
784 clh = GNUNET_new (struct ClientLookupHandle);
785 GNUNET_SERVER_client_set_user_context (client, clh);
786 GNUNET_CONTAINER_DLL_insert (clh_head, clh_tail, clh);
787 clh->client = client;
788 clh->request_id = sh_msg->id;
789 if ( (GNUNET_DNSPARSER_TYPE_A == ntohl (sh_msg->type)) &&
790 (GNUNET_OK != v4_enabled) )
792 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
793 "LOOKUP: Query for A record but AF_INET not supported!");
794 send_lookup_response (clh, 0, NULL);
797 if ( (GNUNET_DNSPARSER_TYPE_AAAA == ntohl (sh_msg->type)) &&
798 (GNUNET_OK != v6_enabled) )
800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
801 "LOOKUP: Query for AAAA record but AF_INET6 not supported!");
802 send_lookup_response (clh, 0, NULL);
805 clh->lookup = GNS_resolver_lookup (&sh_msg->zone,
806 ntohl (sh_msg->type),
809 (enum GNUNET_GNS_LocalOptions) ntohs (sh_msg->options),
810 &send_lookup_response, clh);
811 GNUNET_STATISTICS_update (statistics,
818 * One of our clients disconnected, clean up after it.
821 * @param client the client that disconnected
824 notify_client_disconnect (void *cls,
825 struct GNUNET_SERVER_Client *client)
827 struct ClientLookupHandle *clh;
831 clh = GNUNET_SERVER_client_get_user_context (client, struct ClientLookupHandle);
834 GNS_resolver_lookup_cancel (clh->lookup);
835 GNUNET_CONTAINER_DLL_remove (clh_head, clh_tail, clh);
841 * The zone monitor is now in SYNC with the current state of the
842 * name store. Start to perform periodic iterations.
847 monitor_sync_event (void *cls)
849 zone_publish_task = GNUNET_SCHEDULER_add_now (&publish_zone_dht_start,
855 * Method called to inform about the ego to be used for the master zone
856 * for DNS interceptions.
858 * This function is only called ONCE, and 'NULL' being passed in
859 * @a ego does indicate that interception is not configured.
860 * If @a ego is non-NULL, we should start to intercept DNS queries
861 * and resolve ".gnu" queries using the given ego as the master zone.
863 * @param cls closure, our `const struct GNUNET_CONFIGURATION_Handle *c`
864 * @param ego ego handle
865 * @param ctx context for application to store data for this ego
866 * (during the lifetime of this process, initially NULL)
867 * @param name name assigned by the user for this ego,
868 * NULL if the user just deleted the ego and it
869 * must thus no longer be used
872 identity_intercept_cb (void *cls,
873 struct GNUNET_IDENTITY_Ego *ego,
877 const struct GNUNET_CONFIGURATION_Handle *cfg = cls;
878 struct GNUNET_CRYPTO_EcdsaPublicKey dns_root;
883 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
884 _("No ego configured for `%s`\n"),
888 GNUNET_IDENTITY_ego_get_public_key (ego,
891 GNS_interceptor_init (&dns_root, cfg))
894 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
901 * Process GNS requests.
904 * @param server the initialized server
905 * @param c configuration to use
909 struct GNUNET_SERVER_Handle *server,
910 const struct GNUNET_CONFIGURATION_Handle *c)
912 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
913 { &handle_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, 0},
916 unsigned long long max_parallel_bg_queries = 0;
918 v6_enabled = GNUNET_NETWORK_test_pf (PF_INET6);
919 v4_enabled = GNUNET_NETWORK_test_pf (PF_INET);
920 min_relative_record_time = GNUNET_TIME_UNIT_FOREVER_REL;
921 namestore_handle = GNUNET_NAMESTORE_connect (c);
922 if (NULL == namestore_handle)
924 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
925 _("Failed to connect to the namestore!\n"));
926 GNUNET_SCHEDULER_shutdown ();
929 namecache_handle = GNUNET_NAMECACHE_connect (c);
930 if (NULL == namecache_handle)
932 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
933 _("Failed to connect to the namecache!\n"));
934 GNUNET_SCHEDULER_shutdown ();
938 put_interval = INITIAL_PUT_INTERVAL;
939 zone_publish_time_window_default = DEFAULT_ZONE_PUBLISH_TIME_WINDOW;
941 GNUNET_CONFIGURATION_get_value_time (c, "gns",
942 "ZONE_PUBLISH_TIME_WINDOW",
943 &zone_publish_time_window_default))
945 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
946 "Time window for zone iteration: %s\n",
947 GNUNET_STRINGS_relative_time_to_string (zone_publish_time_window,
950 zone_publish_time_window = zone_publish_time_window_default;
952 GNUNET_CONFIGURATION_get_value_number (c, "gns",
953 "MAX_PARALLEL_BACKGROUND_QUERIES",
954 &max_parallel_bg_queries))
956 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
957 "Number of allowed parallel background queries: %llu\n",
958 max_parallel_bg_queries);
961 dht_handle = GNUNET_DHT_connect (c,
962 (unsigned int) max_parallel_bg_queries);
963 if (NULL == dht_handle)
965 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
966 _("Could not connect to DHT!\n"));
967 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
971 identity_handle = GNUNET_IDENTITY_connect (c,
974 if (NULL == identity_handle)
976 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
977 "Could not connect to identity service!\n");
981 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
982 "Looking for gns-intercept ego\n");
983 identity_op = GNUNET_IDENTITY_get (identity_handle,
985 &identity_intercept_cb,
988 GNS_resolver_init (namecache_handle,
991 max_parallel_bg_queries);
992 GNS_shorten_init (namestore_handle,
995 GNUNET_SERVER_disconnect_notify (server,
996 ¬ify_client_disconnect,
998 /* Schedule periodic put for our records. */
999 first_zone_iteration = GNUNET_YES;
1000 GNUNET_SERVER_add_handlers (server, handlers);
1001 statistics = GNUNET_STATISTICS_create ("gns", c);
1002 nc = GNUNET_SERVER_notification_context_create (server, 1);
1003 zmon = GNUNET_NAMESTORE_zone_monitor_start (c,
1006 &handle_monitor_event,
1007 &monitor_sync_event,
1009 GNUNET_break (NULL != zmon);
1010 GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
1015 * The main function for the GNS service.
1017 * @param argc number of arguments from the command line
1018 * @param argv command line arguments
1019 * @return 0 ok, 1 on error
1022 main (int argc, char *const *argv)
1028 GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
1033 /* end of gnunet-service-gns.c */