2 This file is part of GNUnet.
3 (C) 2011-2013 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.
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 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.
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_gns_service.h"
34 #include "gnunet_statistics_service.h"
36 #include "gnunet-service-gns_resolver.h"
37 #include "gnunet-service-gns_shorten.h"
38 #include "gnunet-service-gns_interceptor.h"
39 #include "gnunet_protocols.h"
42 * The initial interval in milliseconds btween puts in
45 #define INITIAL_PUT_INTERVAL GNUNET_TIME_UNIT_MILLISECONDS
48 * The upper bound for the zone iteration interval in milliseconds
50 #define MINIMUM_ZONE_ITERATION_INTERVAL GNUNET_TIME_UNIT_SECONDS
53 * The default put interval for the zone iteration. In case
56 #define DEFAULT_ZONE_PUBLISH_TIME_WINDOW GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 4)
59 * The factor the current zone iteration interval is divided by for each
60 * additional new record
62 #define LATE_ITERATION_SPEEDUP_FACTOR 2
65 * How long until a DHT PUT attempt should time out?
67 #define DHT_OPERATION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 60)
70 * What replication level do we use for DHT PUT operations?
72 #define DHT_GNS_REPLICATION_LEVEL 5
76 * Handle to a lookup operation from api
78 struct ClientLookupHandle
82 * We keep these in a DLL.
84 struct ClientLookupHandle *next;
87 * We keep these in a DLL.
89 struct ClientLookupHandle *prev;
92 * Handle to the requesting client
94 struct GNUNET_SERVER_Client *client;
97 * Active handle for the lookup.
99 struct GNS_ResolverHandle *lookup;
110 * Handle for DHT PUT activity triggered from the namestore monitor.
112 struct MonitorActivity
117 struct MonitorActivity *next;
122 struct MonitorActivity *prev;
125 * Handle for the DHT PUT operation.
127 struct GNUNET_DHT_PutHandle *ph;
132 * Our handle to the DHT
134 static struct GNUNET_DHT_Handle *dht_handle;
137 * Active DHT put operation (or NULL)
139 static struct GNUNET_DHT_PutHandle *active_put;
142 * Our handle to the namestore service
144 static struct GNUNET_NAMESTORE_Handle *namestore_handle;
147 * Our handle to the namecache service
149 static struct GNUNET_NAMECACHE_Handle *namecache_handle;
152 * Handle to iterate over our authoritative zone in namestore
154 static struct GNUNET_NAMESTORE_ZoneIterator *namestore_iter;
157 * Handle to monitor namestore changes to instant propagation.
159 static struct GNUNET_NAMESTORE_ZoneMonitor *zmon;
162 * Our notification context.
164 static struct GNUNET_SERVER_NotificationContext *nc;
169 static struct ClientLookupHandle *clh_head;
174 static struct ClientLookupHandle *clh_tail;
177 * Head of monitor activities; kept in a DLL.
179 static struct MonitorActivity *ma_head;
182 * Tail of monitor activities; kept in a DLL.
184 static struct MonitorActivity *ma_tail;
187 * Useful for zone update for DHT put
189 static unsigned long long num_public_records;
192 * Last seen record count
194 static unsigned long long last_num_public_records;
197 * Minimum relative expiration time of records seem during the current
200 static struct GNUNET_TIME_Relative min_relative_record_time;
203 * Zone iteration PUT interval.
205 static struct GNUNET_TIME_Relative put_interval;
208 * Default time window for zone iteration
210 static struct GNUNET_TIME_Relative zone_publish_time_window_default;
213 * Time window for zone iteration, adjusted based on relative record
214 * expiration times in our zone.
216 static struct GNUNET_TIME_Relative zone_publish_time_window;
221 static GNUNET_SCHEDULER_TaskIdentifier zone_publish_task;
224 * #GNUNET_YES if zone has never been published before
226 static int first_zone_iteration;
229 * #GNUNET_YES if ipv6 is supported
231 static int v6_enabled;
234 * #GNUNET_YES if ipv4 is supported
236 static int v4_enabled;
239 * Did we finish the initial iteration over the namestore?
240 * (while we do the initial iteration, we do not generate
241 * DHT PUTs as there might be WAY too many of those).
242 * TODO: expand namestore monitor API with a way to
243 * suppress this initial iteration.
245 static int sync_finished;
248 * Handle to the statistics service
250 static struct GNUNET_STATISTICS_Handle *statistics;
254 * Task run during shutdown.
260 shutdown_task (void *cls,
261 const struct GNUNET_SCHEDULER_TaskContext *tc)
263 struct ClientLookupHandle *clh;
264 struct MonitorActivity *ma;
266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
268 GNUNET_SERVER_notification_context_destroy (nc);
269 while (NULL != (clh = clh_head))
271 GNUNET_SERVER_client_set_user_context (clh->client, NULL);
272 GNS_resolver_lookup_cancel (clh->lookup);
273 GNUNET_CONTAINER_DLL_remove (clh_head, clh_tail, clh);
277 GNS_interceptor_done ();
278 GNS_resolver_done ();
280 while (NULL != (ma = ma_head))
282 GNUNET_DHT_put_cancel (ma->ph);
283 GNUNET_CONTAINER_DLL_remove (ma_head,
288 if (NULL != statistics)
290 GNUNET_STATISTICS_destroy (statistics, GNUNET_NO);
293 if (GNUNET_SCHEDULER_NO_TASK != zone_publish_task)
295 GNUNET_SCHEDULER_cancel (zone_publish_task);
296 zone_publish_task = GNUNET_SCHEDULER_NO_TASK;
298 if (NULL != namestore_iter)
300 GNUNET_NAMESTORE_zone_iteration_stop (namestore_iter);
301 namestore_iter = NULL;
305 GNUNET_NAMESTORE_zone_monitor_stop (zmon);
308 if (NULL != namestore_handle)
310 GNUNET_NAMESTORE_disconnect (namestore_handle);
311 namestore_handle = NULL;
313 if (NULL != namecache_handle)
315 GNUNET_NAMECACHE_disconnect (namecache_handle);
316 namecache_handle = NULL;
318 if (NULL != active_put)
320 GNUNET_DHT_put_cancel (active_put);
323 if (NULL != dht_handle)
325 GNUNET_DHT_disconnect (dht_handle);
332 * Method called periodically that triggers iteration over authoritative records
335 * @param tc task context
338 publish_zone_dht_next (void *cls,
339 const struct GNUNET_SCHEDULER_TaskContext *tc)
341 zone_publish_task = GNUNET_SCHEDULER_NO_TASK;
342 GNUNET_NAMESTORE_zone_iterator_next (namestore_iter);
347 * Periodically iterate over our zone and store everything in dht
350 * @param tc task context
353 publish_zone_dht_start (void *cls,
354 const struct GNUNET_SCHEDULER_TaskContext *tc);
358 * Continuation called from DHT once the PUT operation is done.
360 * @param cls closure, NULL if called from regular iteration,
361 * `struct MonitorActivity` if called from #handle_monitor_event.
362 * @param success #GNUNET_OK on success
365 dht_put_continuation (void *cls,
368 struct MonitorActivity *ma = cls;
369 struct GNUNET_TIME_Relative next_put_interval;
371 num_public_records++;
375 if ( (num_public_records > last_num_public_records) &&
376 (GNUNET_NO == first_zone_iteration) )
378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
379 "Last record count was lower than current record count. Reducing interval.\n");
380 put_interval = GNUNET_TIME_relative_divide (zone_publish_time_window,
382 next_put_interval = GNUNET_TIME_relative_divide (put_interval,
383 LATE_ITERATION_SPEEDUP_FACTOR);
386 next_put_interval = put_interval;
388 GNUNET_STATISTICS_set (statistics,
389 "Current zone iteration interval (ms)",
390 next_put_interval.rel_value_us / 1000LL,
392 zone_publish_task = GNUNET_SCHEDULER_add_delayed (next_put_interval,
393 &publish_zone_dht_next,
398 GNUNET_CONTAINER_DLL_remove (ma_head,
407 * Convert namestore records from the internal format to that
408 * suitable for publication (removes private records, converts
409 * to absolute expiration time).
411 * @param rd input records
412 * @param rd_count size of the @a rd and @a rd_public arrays
413 * @param rd_public where to write the converted records
414 * @return number of records written to @a rd_public
417 convert_records_for_export (const struct GNUNET_GNSRECORD_Data *rd,
418 unsigned int rd_count,
419 struct GNUNET_GNSRECORD_Data *rd_public)
421 struct GNUNET_TIME_Absolute now;
422 unsigned int rd_public_count;
426 now = GNUNET_TIME_absolute_get ();
427 for (i=0;i<rd_count;i++)
428 if (0 == (rd[i].flags & (GNUNET_GNSRECORD_RF_PRIVATE |
429 GNUNET_GNSRECORD_RF_PENDING)))
431 rd_public[rd_public_count] = rd[i];
432 if (0 != (rd[i].flags & GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION))
434 /* GNUNET_GNSRECORD_block_create will convert to absolute time;
435 we just need to adjust our iteration frequency */
436 min_relative_record_time.rel_value_us =
437 GNUNET_MIN (rd_public[rd_public_count].expiration_time,
438 min_relative_record_time.rel_value_us);
440 else if (rd_public[rd_public_count].expiration_time < now.abs_value_us)
442 /* record already expired, skip it */
447 return rd_public_count;
452 * Store GNS records in the DHT.
454 * @param key key of the zone
455 * @param label label to store under
456 * @param rd_public public record data
457 * @param rd_public_count number of records in @a rd_public
458 * @param pc_arg closure argument to pass to the #dht_put_continuation
459 * @return DHT PUT handle, NULL on error
461 static struct GNUNET_DHT_PutHandle *
462 perform_dht_put (const struct GNUNET_CRYPTO_EcdsaPrivateKey *key,
464 const struct GNUNET_GNSRECORD_Data *rd_public,
465 unsigned int rd_public_count,
468 struct GNUNET_GNSRECORD_Block *block;
469 struct GNUNET_HashCode query;
470 struct GNUNET_TIME_Absolute expire;
472 struct GNUNET_DHT_PutHandle *ret;
474 expire = GNUNET_GNSRECORD_record_get_expiration_time (rd_public_count,
476 block = GNUNET_GNSRECORD_block_create (key,
481 block_size = ntohl (block->purpose.size)
482 + sizeof (struct GNUNET_CRYPTO_EcdsaSignature)
483 + sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey);
484 GNUNET_GNSRECORD_query_from_private_key (key,
487 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
488 "Storing record in DHT with expiration `%s'\n",
489 GNUNET_STRINGS_absolute_time_to_string (expire));
490 ret = GNUNET_DHT_put (dht_handle, &query,
491 DHT_GNS_REPLICATION_LEVEL,
492 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
493 GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
497 DHT_OPERATION_TIMEOUT,
498 &dht_put_continuation,
506 * Function used to put all records successively into the DHT.
508 * @param cls the closure (NULL)
509 * @param key the private key of the authority (ours)
510 * @param name the name of the records, NULL once the iteration is done
511 * @param rd_count the number of records in @a rd
512 * @param rd the record data
515 put_gns_record (void *cls,
516 const struct GNUNET_CRYPTO_EcdsaPrivateKey *key,
518 unsigned int rd_count,
519 const struct GNUNET_GNSRECORD_Data *rd)
521 struct GNUNET_GNSRECORD_Data rd_public[rd_count];
522 unsigned int rd_public_count;
526 /* we're done with one iteration, calculate when to do the next one */
527 namestore_iter = NULL;
528 last_num_public_records = num_public_records;
529 first_zone_iteration = GNUNET_NO;
530 if (0 == num_public_records)
533 * If no records are known (startup) or none present
534 * we can safely set the interval to the value for a single
537 put_interval = zone_publish_time_window;
538 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
539 "No records in namestore database.\n");
543 zone_publish_time_window
544 = GNUNET_TIME_relative_min (GNUNET_TIME_relative_divide (min_relative_record_time,
546 zone_publish_time_window_default);
547 put_interval = GNUNET_TIME_relative_divide (zone_publish_time_window,
550 /* reset for next iteration */
551 min_relative_record_time = GNUNET_TIME_UNIT_FOREVER_REL;
552 put_interval = GNUNET_TIME_relative_max (MINIMUM_ZONE_ITERATION_INTERVAL,
555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
556 "Zone iteration finished. Adjusted zone iteration interval to %s\n",
557 GNUNET_STRINGS_relative_time_to_string (put_interval, GNUNET_YES));
558 GNUNET_STATISTICS_set (statistics,
559 "Current zone iteration interval (in ms)",
560 put_interval.rel_value_us / 1000LL,
562 GNUNET_STATISTICS_update (statistics,
563 "Number of zone iterations",
566 GNUNET_STATISTICS_set (statistics,
567 "Number of public records in DHT",
568 last_num_public_records,
570 if (0 == num_public_records)
571 zone_publish_task = GNUNET_SCHEDULER_add_delayed (put_interval,
572 &publish_zone_dht_start,
575 zone_publish_task = GNUNET_SCHEDULER_add_now (&publish_zone_dht_start,
580 rd_public_count = convert_records_for_export (rd,
584 /* We got a set of records to publish */
585 if (0 == rd_public_count)
587 zone_publish_task = GNUNET_SCHEDULER_add_now (&publish_zone_dht_next,
592 active_put = perform_dht_put (key,
597 if (NULL == active_put)
600 dht_put_continuation (NULL, GNUNET_NO);
606 * Periodically iterate over our zone and store everything in dht
609 * @param tc task context
612 publish_zone_dht_start (void *cls,
613 const struct GNUNET_SCHEDULER_TaskContext *tc)
615 zone_publish_task = GNUNET_SCHEDULER_NO_TASK;
617 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
618 "Starting DHT zone update!\n");
619 /* start counting again */
620 num_public_records = 0;
621 namestore_iter = GNUNET_NAMESTORE_zone_iteration_start (namestore_handle,
622 NULL, /* All zones */
629 * Process a record that was stored in the namestore
630 * (invoked by the monitor).
632 * @param cls closure, NULL
633 * @param zone private key of the zone; NULL on disconnect
634 * @param label label of the records; NULL on disconnect
635 * @param rd_count number of entries in @a rd array, 0 if label was deleted
636 * @param rd array of records with data to store
639 handle_monitor_event (void *cls,
640 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
642 unsigned int rd_count,
643 const struct GNUNET_GNSRECORD_Data *rd)
645 struct GNUNET_GNSRECORD_Data rd_public[rd_count];
646 unsigned int rd_public_count;
647 struct MonitorActivity *ma;
649 if (GNUNET_YES != sync_finished)
650 return; /* do not do DHT PUTs on initial sync, as that may
651 create far too many PUTs on startup */
652 /* filter out records that are not public, and convert to
653 absolute expiration time. */
654 rd_public_count = convert_records_for_export (rd, rd_count,
656 if (0 == rd_public_count)
657 return; /* nothing to do */
658 ma = GNUNET_new (struct MonitorActivity);
659 ma->ph = perform_dht_put (zone, label,
664 /* PUT failed, do not remember operation */
668 GNUNET_CONTAINER_DLL_insert (ma_head,
674 /* END DHT ZONE PROPAGATION */
678 * Reply to client with the result from our lookup.
680 * @param cls the closure (our client lookup handle)
681 * @param rd_count the number of records in @a rd
682 * @param rd the record data
685 send_lookup_response (void* cls,
687 const struct GNUNET_GNSRECORD_Data *rd)
689 struct ClientLookupHandle *clh = cls;
690 struct GNUNET_GNS_ClientLookupResultMessage *rmsg;
693 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
694 "Sending `%s' message with %d results\n",
698 len = GNUNET_GNSRECORD_records_get_size (rd_count, rd);
699 rmsg = GNUNET_malloc (len + sizeof (struct GNUNET_GNS_ClientLookupResultMessage));
700 rmsg->header.type = htons (GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT);
701 rmsg->header.size = htons (len + sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
702 rmsg->id = clh->request_id;
703 rmsg->rd_count = htonl (rd_count);
704 GNUNET_GNSRECORD_records_serialize (rd_count, rd, len,
706 GNUNET_SERVER_notification_context_unicast (nc,
711 GNUNET_CONTAINER_DLL_remove (clh_head, clh_tail, clh);
712 GNUNET_SERVER_client_set_user_context (clh->client, NULL);
714 GNUNET_STATISTICS_update (statistics,
715 "Completed lookups", 1,
717 GNUNET_STATISTICS_update (statistics,
725 * Handle lookup requests from client
727 * @param cls the closure
728 * @param client the client
729 * @param message the message
732 handle_lookup (void *cls,
733 struct GNUNET_SERVER_Client *client,
734 const struct GNUNET_MessageHeader *message)
736 char name[GNUNET_DNSPARSER_MAX_NAME_LENGTH + 1];
737 struct ClientLookupHandle *clh;
738 char *nameptr = name;
740 const struct GNUNET_CRYPTO_EcdsaPrivateKey *key;
742 const struct GNUNET_GNS_ClientLookupMessage *sh_msg;
744 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
745 "Received `%s' message\n",
747 msg_size = ntohs (message->size);
748 if (msg_size < sizeof (struct GNUNET_GNS_ClientLookupMessage))
751 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
754 sh_msg = (const struct GNUNET_GNS_ClientLookupMessage *) message;
755 GNUNET_SERVER_notification_context_add (nc, client);
756 if (GNUNET_YES == ntohs (sh_msg->have_key))
757 key = &sh_msg->shorten_key;
760 utf_in = (const char *) &sh_msg[1];
761 if ( ('\0' != utf_in[msg_size - sizeof (struct GNUNET_GNS_ClientLookupMessage) - 1]) ||
762 (strlen (utf_in) > GNUNET_DNSPARSER_MAX_NAME_LENGTH) )
765 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
768 GNUNET_STRINGS_utf8_tolower (utf_in, &nameptr);
769 GNUNET_SERVER_receive_done (client, GNUNET_OK);
771 clh = GNUNET_new (struct ClientLookupHandle);
772 GNUNET_SERVER_client_set_user_context (client, clh);
773 GNUNET_CONTAINER_DLL_insert (clh_head, clh_tail, clh);
774 clh->client = client;
775 clh->request_id = sh_msg->id;
776 if ( (GNUNET_DNSPARSER_TYPE_A == ntohl (sh_msg->type)) &&
777 (GNUNET_OK != v4_enabled) )
779 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
780 "LOOKUP: Query for A record but AF_INET not supported!");
781 send_lookup_response (clh, 0, NULL);
784 if ( (GNUNET_DNSPARSER_TYPE_AAAA == ntohl (sh_msg->type)) &&
785 (GNUNET_OK != v6_enabled) )
787 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
788 "LOOKUP: Query for AAAA record but AF_INET6 not supported!");
789 send_lookup_response (clh, 0, NULL);
792 clh->lookup = GNS_resolver_lookup (&sh_msg->zone,
793 ntohl (sh_msg->type),
796 ntohl (sh_msg->only_cached),
797 &send_lookup_response, clh);
798 GNUNET_STATISTICS_update (statistics,
805 * One of our clients disconnected, clean up after it.
808 * @param client the client that disconnected
811 notify_client_disconnect (void *cls,
812 struct GNUNET_SERVER_Client *client)
814 struct ClientLookupHandle *clh;
818 clh = GNUNET_SERVER_client_get_user_context (client, struct ClientLookupHandle);
821 GNS_resolver_lookup_cancel (clh->lookup);
822 GNUNET_CONTAINER_DLL_remove (clh_head, clh_tail, clh);
828 * The zone monitor is now in SYNC with the current state of the
829 * name store. Start to perform periodic iterations.
834 monitor_sync_event (void *cls)
836 sync_finished = GNUNET_YES;
837 zone_publish_task = GNUNET_SCHEDULER_add_now (&publish_zone_dht_start,
843 * Process GNS requests.
846 * @param server the initialized server
847 * @param c configuration to use
850 run (void *cls, struct GNUNET_SERVER_Handle *server,
851 const struct GNUNET_CONFIGURATION_Handle *c)
853 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
854 { &handle_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, 0},
857 struct GNUNET_CRYPTO_EcdsaPublicKey dns_root;
858 unsigned long long max_parallel_bg_queries = 0;
861 v6_enabled = GNUNET_NETWORK_test_pf (PF_INET6);
862 v4_enabled = GNUNET_NETWORK_test_pf (PF_INET);
863 min_relative_record_time = GNUNET_TIME_UNIT_FOREVER_REL;
864 namestore_handle = GNUNET_NAMESTORE_connect (c);
865 if (NULL == namestore_handle)
867 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
868 _("Failed to connect to the namestore!\n"));
869 GNUNET_SCHEDULER_shutdown ();
872 namecache_handle = GNUNET_NAMECACHE_connect (c);
873 if (NULL == namecache_handle)
875 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
876 _("Failed to connect to the namecache!\n"));
877 GNUNET_SCHEDULER_shutdown ();
881 put_interval = INITIAL_PUT_INTERVAL;
882 zone_publish_time_window_default = DEFAULT_ZONE_PUBLISH_TIME_WINDOW;
884 GNUNET_CONFIGURATION_get_value_time (c, "gns",
885 "ZONE_PUBLISH_TIME_WINDOW",
886 &zone_publish_time_window_default))
888 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
889 "Time window for zone iteration: %s\n",
890 GNUNET_STRINGS_relative_time_to_string (zone_publish_time_window,
893 zone_publish_time_window = zone_publish_time_window_default;
895 GNUNET_CONFIGURATION_get_value_number (c, "gns",
896 "MAX_PARALLEL_BACKGROUND_QUERIES",
897 &max_parallel_bg_queries))
899 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
900 "Number of allowed parallel background queries: %llu\n",
901 max_parallel_bg_queries);
904 dht_handle = GNUNET_DHT_connect (c,
905 (unsigned int) max_parallel_bg_queries);
906 if (NULL == dht_handle)
908 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
909 _("Could not connect to DHT!\n"));
910 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
915 GNUNET_CONFIGURATION_get_value_string (c, "gns", "DNS_ROOT",
919 GNUNET_CRYPTO_ecdsa_public_key_from_string (dns_root_name,
920 strlen (dns_root_name),
923 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
925 _("valid public key required"));
926 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
927 GNUNET_free (dns_root_name);
930 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
931 "DNS hijacking with root `%s' enabled. Connecting to DNS service.\n",
933 GNUNET_free (dns_root_name);
935 GNS_interceptor_init (&dns_root, c))
937 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
941 GNS_resolver_init (namecache_handle,
944 max_parallel_bg_queries);
945 GNS_shorten_init (namestore_handle,
948 GNUNET_SERVER_disconnect_notify (server,
949 ¬ify_client_disconnect,
951 /* Schedule periodic put for our records. */
952 first_zone_iteration = GNUNET_YES;
953 GNUNET_SERVER_add_handlers (server, handlers);
954 statistics = GNUNET_STATISTICS_create ("gns", c);
955 nc = GNUNET_SERVER_notification_context_create (server, 1);
956 zmon = GNUNET_NAMESTORE_zone_monitor_start (c,
958 &handle_monitor_event,
961 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
962 &shutdown_task, NULL);
967 * The main function for the GNS service.
969 * @param argc number of arguments from the command line
970 * @param argv command line arguments
971 * @return 0 ok, 1 on error
974 main (int argc, char *const *argv)
980 GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
985 /* end of gnunet-service-gns.c */