2 This file is part of GNUnet.
3 (C) 2009, 2010, 2011 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.
23 * @file gns/gnunet-service-gns.c
24 * @brief GNUnet GNS service
25 * @author Martin Schanzenbach
28 #include "gnunet_util_lib.h"
29 #include "gnunet_transport_service.h"
30 #include "gnunet_dns_service.h"
31 #include "gnunet_dnsparser_lib.h"
32 #include "gnunet_dht_service.h"
33 #include "gnunet_namestore_service.h"
34 #include "gnunet_gns_service.h"
35 #include "gnunet_statistics_service.h"
36 #include "block_gns.h"
38 #include "gnunet-service-gns_resolver.h"
39 #include "gnunet-service-gns_interceptor.h"
40 #include "gnunet_protocols.h"
42 #define INITIAL_ZONE_ITERATION_INTERVAL GNUNET_TIME_UNIT_MILLISECONDS
43 #define MINIMUM_ZONE_ITERATION_INTERVAL GNUNET_TIME_UNIT_SECONDS
44 #define DEFAULT_RECORD_PUT_INTERVAL GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 4)
45 #define LATE_ITERATION_SPEEDUP_FACTOR 2
49 * Handle to a shorten operation from api
51 struct ClientShortenHandle
55 struct ClientShortenHandle *next;
58 struct ClientShortenHandle *prev;
60 /* the requesting client that */
61 struct GNUNET_SERVER_Client *client;
67 enum GNUNET_GNS_RecordType type;
70 char name[MAX_DNS_NAME_LENGTH];
72 /* name of private zone (relative to root) */
73 char private_zone_id[MAX_DNS_NAME_LENGTH];
75 /* name of shorten zone (relative to root) */
76 char shorten_zone_id[MAX_DNS_NAME_LENGTH];
79 struct GNUNET_CRYPTO_ShortHashCode root_zone;
82 struct GNUNET_CRYPTO_ShortHashCode private_zone;
85 struct GNUNET_CRYPTO_ShortHashCode shorten_zone;
87 /* Namestore lookup task */
88 struct GNUNET_NAMESTORE_QueueEntry *namestore_task;
94 * Handle to a get auhtority operation from api
96 struct ClientGetAuthHandle
98 /* the requesting client that */
99 struct GNUNET_SERVER_Client *client;
104 /* name to lookup authority */
111 * Handle to a lookup operation from api
113 struct ClientLookupHandle
116 /* the requesting client that */
117 struct GNUNET_SERVER_Client *client;
119 /* The zone we look up in */
120 struct GNUNET_CRYPTO_ShortHashCode zone;
122 /* Do we only want to lookup from local cache? */
129 enum GNUNET_GNS_RecordType type;
131 /* optional zone private key used for shorten */
132 struct GNUNET_CRYPTO_RsaPrivateKey *shorten_key;
134 /* the name to look up */
135 char* name; //Needed?
139 * Our handle to the DHT
141 static struct GNUNET_DHT_Handle *dht_handle;
144 * Our zone's private key
146 struct GNUNET_CRYPTO_RsaPrivateKey *zone_key;
149 * Our handle to the namestore service
150 * FIXME maybe need a second handle for iteration
152 struct GNUNET_NAMESTORE_Handle *namestore_handle;
155 * Handle to iterate over our authoritative zone in namestore
157 struct GNUNET_NAMESTORE_ZoneIterator *namestore_iter;
160 * The configuration the GNS service is running with
162 const struct GNUNET_CONFIGURATION_Handle *GNS_cfg;
165 * Our notification context.
167 static struct GNUNET_SERVER_NotificationContext *nc;
172 struct GNUNET_CRYPTO_ShortHashCode zone_hash;
175 * Useful for zone update for DHT put
177 static unsigned long long num_public_records;
180 * Last seen record count
182 static unsigned long long last_num_public_records;
184 static struct GNUNET_TIME_Relative zone_iteration_interval;
186 /* dht update interval FIXME define? */
187 static struct GNUNET_TIME_Relative record_put_interval;
189 /* zone update task */
190 GNUNET_SCHEDULER_TaskIdentifier zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
192 /* automatic pkey import for name shortening */
193 static int auto_import_pkey;
195 /* first zone iteration is specia */
196 static int first_zone_iteration;
199 static struct GNUNET_TIME_Relative default_lookup_timeout;
202 static int v6_enabled;
205 static int v4_enabled;
207 /* Shorten DLL for cancelling NS requests */
208 static struct ClientShortenHandle *csh_head;
210 /* Shorten DLL for cancelling NS requests */
211 static struct ClientShortenHandle *csh_tail;
213 /* Statistics handle */
214 static struct GNUNET_STATISTICS_Handle *statistics;
217 * Send shorten response back to client
219 * @param cls the closure containing a client shorten handle
220 * @param name the shortened name result or NULL if cannot be shortened
223 send_shorten_response(void* cls, const char* name);
230 on_resolver_cleanup(void)
232 if (NULL != statistics)
233 GNUNET_STATISTICS_destroy (statistics, GNUNET_NO);
235 if (NULL != namestore_iter)
236 GNUNET_NAMESTORE_zone_iteration_stop (namestore_iter);
237 GNUNET_NAMESTORE_disconnect(namestore_handle);
238 GNUNET_DHT_disconnect(dht_handle);
242 * Task run during shutdown.
248 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
250 struct ClientShortenHandle *csh_tmp = csh_head;
252 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
255 while (csh_tmp != NULL)
257 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh_tmp);
258 send_shorten_response (csh_tmp, csh_tmp->name);
261 GNUNET_SERVER_notification_context_destroy (nc);
263 gns_interceptor_stop();
264 gns_resolver_cleanup(&on_resolver_cleanup);
265 /* Kill zone task for it may make the scheduler hang */
266 if (zone_update_taskid != GNUNET_SCHEDULER_NO_TASK)
267 GNUNET_SCHEDULER_cancel(zone_update_taskid);
272 * Method called periodicattluy that triggers
273 * iteration over root zone
276 * @param tc task context
279 update_zone_dht_next(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
281 zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
282 GNUNET_NAMESTORE_zone_iterator_next (namestore_iter);
286 * Continuation for DHT put
289 * @param success GNUNET_OK if the PUT was transmitted,
290 * GNUNET_NO on timeout,
291 * GNUNET_SYSERR on disconnect from service
292 * after the PUT message was transmitted
293 * (so we don't know if it was received or not)
296 record_dht_put(void *cls, int success)
298 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "put request transmitted\n");
303 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
306 * Function used to put all records successively into the DHT.
308 * @param cls the closure (NULL)
309 * @param key the public key of the authority (ours)
310 * @param expiration lifetime of the namestore entry
311 * @param name the name of the records
312 * @param rd_count the number of records in data
313 * @param rd the record data
314 * @param signature the signature for the record data
317 put_gns_record(void *cls,
318 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
319 struct GNUNET_TIME_Absolute expiration,
321 unsigned int rd_count,
322 const struct GNUNET_NAMESTORE_RecordData *rd,
323 const struct GNUNET_CRYPTO_RsaSignature *signature)
326 struct GNSNameRecordBlock *nrb;
327 struct GNUNET_CRYPTO_ShortHashCode name_hash;
328 struct GNUNET_CRYPTO_ShortHashCode zhash;
329 struct GNUNET_HashCode xor_hash;
330 struct GNUNET_HashCode name_hash_double;
331 struct GNUNET_HashCode zone_hash_double;
332 uint32_t rd_payload_length;
333 char* nrb_data = NULL;
335 struct GNUNET_TIME_Relative next_put_interval;
342 first_zone_iteration = GNUNET_NO;
343 if (0 == num_public_records)
346 * If no records are known (startup) or none present
347 * we can safely set the interval to the value for a single
350 zone_iteration_interval = GNUNET_TIME_relative_divide (record_put_interval,
353 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
354 "No records in db.\n");
358 zone_iteration_interval = GNUNET_TIME_relative_divide (record_put_interval,
362 zone_iteration_interval = GNUNET_TIME_relative_max (MINIMUM_ZONE_ITERATION_INTERVAL,
363 zone_iteration_interval);
365 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
366 "Adjusted zone iteration interval to %llus!\n",
367 zone_iteration_interval.rel_value);
368 GNUNET_STATISTICS_set (statistics,
369 "Current zone iteration interval [msec]",
370 zone_iteration_interval.rel_value,
373 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
374 "Zone iteration finished. Rescheduling zone iteration\n");
376 namestore_iter = NULL;
377 if (num_public_records == 0)
378 zone_update_taskid = GNUNET_SCHEDULER_add_delayed (zone_iteration_interval,
379 &update_zone_dht_start,
382 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start, NULL);
383 GNUNET_STATISTICS_update (statistics,
384 "Number of zone iterations", 1, GNUNET_NO);
386 last_num_public_records = num_public_records;
387 GNUNET_STATISTICS_set (statistics,
388 "Number of public records in DHT",
389 last_num_public_records,
394 namelen = strlen(name) + 1;
398 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
399 "No records given for name %s! Skipping...\n",
401 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
406 if (signature == NULL)
408 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
409 "No signature for %s record data provided! Skipping...\n",
411 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
417 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
418 "Putting records for %s into the DHT\n", name);
420 rd_payload_length = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
422 nrb = GNUNET_malloc(rd_payload_length + namelen
423 + sizeof(struct GNSNameRecordBlock));
425 nrb->signature = *signature;
427 nrb->public_key = *key;
429 nrb->rd_count = htonl(rd_count);
431 memcpy(&nrb[1], name, namelen);
433 nrb_data = (char*)&nrb[1];
436 rd_payload_length += sizeof(struct GNSNameRecordBlock) + namelen;
438 if (-1 == GNUNET_NAMESTORE_records_serialize (rd_count,
443 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
444 "Record serialization failed! Skipping...\n");
446 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
453 * calculate DHT key: H(name) xor H(pubkey)
455 GNUNET_CRYPTO_short_hash(key,
456 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
458 GNUNET_CRYPTO_short_hash(name, strlen(name), &name_hash);
459 GNUNET_CRYPTO_short_hash_double (&name_hash, &name_hash_double);
460 GNUNET_CRYPTO_short_hash_double (&zhash, &zone_hash_double);
461 GNUNET_CRYPTO_hash_xor(&zone_hash_double, &name_hash_double, &xor_hash);
463 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
464 "zone identity: %s\n", GNUNET_h2s (&zone_hash_double));
466 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
467 "putting %d records for %s under key: %s with size %d\n",
468 rd_count, name, GNUNET_h2s (&xor_hash), rd_payload_length);
470 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
471 "DHT req to %d\n", DHT_OPERATION_TIMEOUT.rel_value);
473 GNUNET_STATISTICS_update (statistics,
474 "Record bytes put into DHT", rd_payload_length, GNUNET_NO);
476 /* FIXME: keep return value to possibly cancel? */
477 GNUNET_DHT_put (dht_handle, &xor_hash,
478 DHT_GNS_REPLICATION_LEVEL,
479 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
480 GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
484 DHT_OPERATION_TIMEOUT,
486 NULL); //cls for cont
488 num_public_records++;
490 if ((num_public_records > last_num_public_records)
491 && (first_zone_iteration == GNUNET_NO))
493 zone_iteration_interval = GNUNET_TIME_relative_divide (record_put_interval,
495 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
496 "Last record count was lower than current record count... increasing.\n");
497 next_put_interval = GNUNET_TIME_relative_divide (zone_iteration_interval,
498 LATE_ITERATION_SPEEDUP_FACTOR);
502 next_put_interval = zone_iteration_interval;
504 GNUNET_STATISTICS_set (statistics,
505 "Current zone iteration interval [msec]",
506 next_put_interval.rel_value,
510 * Reschedule periodic put
512 zone_update_taskid = GNUNET_SCHEDULER_add_delayed (next_put_interval,
513 &update_zone_dht_next,
521 * Periodically iterate over our zone and store everything in dht
524 * @param tc task context
527 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
529 zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
531 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Scheduling DHT zone update!\n");
533 /* start counting again */
534 num_public_records = 0;
535 namestore_iter = GNUNET_NAMESTORE_zone_iteration_start (namestore_handle,
537 GNUNET_NAMESTORE_RF_AUTHORITY,
538 GNUNET_NAMESTORE_RF_PRIVATE,
543 /* END DHT ZONE PROPAGATION */
546 * Send shorten response back to client
548 * @param cls the closure containing a client shorten handle
549 * @param name the shortened name result or NULL if cannot be shortened
552 send_shorten_response(void* cls, const char* name)
554 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
555 "SHORTEN_RESULT", name);
556 struct GNUNET_GNS_ClientShortenResultMessage *rmsg;
557 struct ClientShortenHandle *csh = (struct ClientShortenHandle *)cls;
564 GNUNET_STATISTICS_update (statistics,
565 "Name shorten results", 1, GNUNET_NO);
567 rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientShortenResultMessage)
570 rmsg->id = csh->unique_id;
571 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_SHORTEN_RESULT);
573 htons(sizeof(struct GNUNET_GNS_ClientShortenResultMessage) +
576 strcpy((char*)&rmsg[1], name);
578 GNUNET_SERVER_notification_context_unicast (nc, csh->client,
579 (const struct GNUNET_MessageHeader *) rmsg,
581 GNUNET_SERVER_receive_done (csh->client, GNUNET_OK);
583 if (NULL != csh->namestore_task)
584 GNUNET_NAMESTORE_cancel (csh->namestore_task);
593 * Lookup the zone infos and shorten name
595 * @param cls the client shorten handle
596 * @param key key of the zone
597 * @param expiration expiration of record
598 * @param name name found or null if no result
599 * @param rd_count number of records found
600 * @param rd record data
605 process_shorten_in_private_zone_lookup (void *cls,
606 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
607 struct GNUNET_TIME_Absolute expiration,
609 unsigned int rd_count,
610 const struct GNUNET_NAMESTORE_RecordData *rd,
611 const struct GNUNET_CRYPTO_RsaSignature *signature)
613 struct ClientShortenHandle *csh = cls;
614 csh->namestore_task = NULL;
615 struct GNUNET_CRYPTO_ShortHashCode *szone = &csh->shorten_zone;
616 struct GNUNET_CRYPTO_ShortHashCode *pzone = &csh->private_zone;
618 if (0 == strcmp (csh->private_zone_id, ""))
623 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
624 "No shorten zone in private zone!\n");
626 strcpy (csh->shorten_zone_id, "");
633 GNUNET_assert (rd_count == 1);
635 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
636 "Shorten zone %s found in private zone %s\n",
637 name, csh->private_zone_id);
639 sprintf (csh->shorten_zone_id, "%s.%s", name, csh->private_zone_id);
642 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
644 gns_resolver_shorten_name (&csh->root_zone,
648 csh->private_zone_id,
649 csh->shorten_zone_id,
650 &send_shorten_response, csh);
656 * Lookup the zone infos and shorten name
658 * @param cls the shorten handle
659 * @param key key of the zone
660 * @param expiration expiration of record
661 * @param name name found or null if no result
662 * @param rd_count number of records found
663 * @param rd record data
668 process_shorten_in_root_zone_lookup (void *cls,
669 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
670 struct GNUNET_TIME_Absolute expiration,
672 unsigned int rd_count,
673 const struct GNUNET_NAMESTORE_RecordData *rd,
674 const struct GNUNET_CRYPTO_RsaSignature *signature)
676 struct ClientShortenHandle *csh = cls;
677 csh->namestore_task = NULL;
678 struct GNUNET_CRYPTO_ShortHashCode *szone = &csh->shorten_zone;
679 struct GNUNET_CRYPTO_ShortHashCode *pzone = &csh->private_zone;
681 if (0 == strcmp (csh->private_zone_id, ""))
686 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
687 "No shorten zone in zone and no private zone!\n");
689 strcpy (csh->shorten_zone_id, "");
691 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
694 gns_resolver_shorten_name (&csh->root_zone,
698 csh->private_zone_id,
699 csh->shorten_zone_id,
700 &send_shorten_response, csh);
704 GNUNET_assert (rd_count == 1);
706 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
707 "Private zone %s found in root zone\n", name);
709 strcpy (csh->private_zone_id, name);
711 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
714 &process_shorten_in_private_zone_lookup,
720 * Lookup the zone infos and shorten name
722 * @param cls the shorten handle
723 * @param key key of the zone
724 * @param expiration expiration of record
725 * @param name name found or null if no result
726 * @param rd_count number of records found
727 * @param rd record data
732 process_private_in_root_zone_lookup (void *cls,
733 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
734 struct GNUNET_TIME_Absolute expiration,
736 unsigned int rd_count,
737 const struct GNUNET_NAMESTORE_RecordData *rd,
738 const struct GNUNET_CRYPTO_RsaSignature *signature)
740 struct ClientShortenHandle *csh = cls;
741 csh->namestore_task = NULL;
745 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
746 "No private zone in root zone\n");
748 strcpy (csh->private_zone_id, "");
750 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
753 &process_shorten_in_root_zone_lookup,
758 GNUNET_assert (rd_count == 1);
760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
761 "Private zone %s found in root zone\n", name);
763 strcpy (csh->private_zone_id, name);
765 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
768 &process_shorten_in_private_zone_lookup,
773 * Lookup the zone infos and shorten name
775 * @param csh the shorten handle
779 start_shorten_name (struct ClientShortenHandle *csh)
781 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
782 "Looking for private zone name in root zone\n");
784 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
787 &process_private_in_root_zone_lookup,
793 * Handle a shorten message from the api
795 * @param cls the closure
796 * @param client the client
797 * @param message the message
799 static void handle_shorten (void *cls,
800 struct GNUNET_SERVER_Client * client,
801 const struct GNUNET_MessageHeader * message)
803 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "SHORTEN");
806 struct ClientShortenHandle *csh;
807 char name[MAX_DNS_NAME_LENGTH];
808 char* nameptr = name;
810 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientShortenMessage))
813 GNUNET_SERVER_receive_done (client, GNUNET_OK);
818 struct GNUNET_GNS_ClientShortenMessage *sh_msg =
819 (struct GNUNET_GNS_ClientShortenMessage *) message;
821 msg_size = ntohs(message->size);
823 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
826 GNUNET_SERVER_receive_done (client, GNUNET_OK);
830 csh = GNUNET_malloc(sizeof (struct ClientShortenHandle));
831 csh->client = client;
832 csh->unique_id = sh_msg->id;
834 GNUNET_CONTAINER_DLL_insert (csh_head, csh_tail, csh);
836 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
837 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
838 "SHORTEN: Converted %s to %s\n", (char*)&sh_msg[1], nameptr);
839 GNUNET_SERVER_notification_context_add (nc, client);
841 if (strlen (name) < strlen(GNUNET_GNS_TLD)) {
842 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
843 "SHORTEN: %s is too short\n", name);
844 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
845 send_shorten_response(csh, name);
849 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
850 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
851 "SHORTEN: %s is too long\n", name);
852 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
853 send_shorten_response(csh, name);
857 if (!is_gnunet_tld(name) && !is_zkey_tld(name))
859 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
860 "%s is not our domain. Returning\n", name);
861 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
862 send_shorten_response(csh, name);
866 csh->shorten_zone = sh_msg->shorten_zone;
867 csh->private_zone = sh_msg->private_zone;
869 strcpy (csh->name, name);
872 if (1 == ntohl(sh_msg->use_default_zone))
873 csh->root_zone = zone_hash; //Default zone
875 csh->root_zone = sh_msg->zone;
877 start_shorten_name (csh);
879 GNUNET_STATISTICS_update (statistics,
880 "Name shorten attempts", 1, GNUNET_NO);
886 * Send get authority response back to client
888 * @param cls the closure containing a client get auth handle
889 * @param name the shortened name result or NULL if cannot be shortened
892 send_get_auth_response(void *cls, const char* name)
894 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
895 "GET_AUTH_RESULT", name);
896 struct GNUNET_GNS_ClientGetAuthResultMessage *rmsg;
897 struct ClientGetAuthHandle *cah = (struct ClientGetAuthHandle *)cls;
901 GNUNET_STATISTICS_update (statistics,
902 "Authorities resolved", 1, GNUNET_NO);
910 rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage)
913 rmsg->id = cah->unique_id;
914 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_GET_AUTH_RESULT);
916 htons(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage) +
919 strcpy((char*)&rmsg[1], name);
921 GNUNET_SERVER_notification_context_unicast (nc, cah->client,
922 (const struct GNUNET_MessageHeader *) rmsg,
924 GNUNET_SERVER_receive_done (cah->client, GNUNET_OK);
927 GNUNET_free_non_null(cah->name);
936 * Handle a get authority message from the api
938 * @param cls the closure
939 * @param client the client
940 * @param message the message
942 static void handle_get_authority(void *cls,
943 struct GNUNET_SERVER_Client * client,
944 const struct GNUNET_MessageHeader * message)
946 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "GET_AUTH");
949 struct ClientGetAuthHandle *cah;
950 char name[MAX_DNS_NAME_LENGTH];
951 char* nameptr = name;
954 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientGetAuthMessage))
957 GNUNET_SERVER_receive_done (client, GNUNET_OK);
961 GNUNET_SERVER_notification_context_add (nc, client);
963 struct GNUNET_GNS_ClientGetAuthMessage *sh_msg =
964 (struct GNUNET_GNS_ClientGetAuthMessage *) message;
966 msg_size = ntohs(message->size);
968 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
971 GNUNET_SERVER_receive_done (client, GNUNET_OK);
975 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
978 cah = GNUNET_malloc(sizeof(struct ClientGetAuthHandle));
979 cah->client = client;
980 cah->unique_id = sh_msg->id;
982 if (strlen(name) < strlen(GNUNET_GNS_TLD))
984 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
985 "GET_AUTH: %s is too short. Returning\n", name);
987 send_get_auth_response(cah, name);
991 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
992 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
993 "GET_AUTH: %s is too long", name);
995 send_get_auth_response(cah, name);
999 if (strcmp(name+strlen(name)-strlen(GNUNET_GNS_TLD),
1000 GNUNET_GNS_TLD) != 0)
1002 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1003 "GET_AUTH: %s is not our domain. Returning\n", name);
1005 send_get_auth_response(cah, name);
1009 if (strcmp(name, GNUNET_GNS_TLD) == 0)
1011 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1012 "GET_AUTH: %s is us. Returning\n", name);
1014 send_get_auth_response(cah, name);
1018 cah->name = GNUNET_malloc(strlen(name)
1019 - strlen(GNUNET_GNS_TLD) + 1);
1020 memset(cah->name, 0,
1021 strlen(name)-strlen(GNUNET_GNS_TLD) + 1);
1022 memcpy(cah->name, name,
1023 strlen(name)-strlen(GNUNET_GNS_TLD));
1025 /* Start delegation resolution in our namestore */
1026 gns_resolver_get_authority(zone_hash, zone_hash, name, &send_get_auth_response, cah);
1028 GNUNET_STATISTICS_update (statistics,
1029 "Authority lookup attempts", 1, GNUNET_NO);
1035 * Reply to client with the result from our lookup.
1037 * @param cls the closure (our client lookup handle)
1038 * @param rd_count the number of records
1039 * @param rd the record data
1042 send_lookup_response(void* cls,
1044 const struct GNUNET_NAMESTORE_RecordData *rd)
1046 struct ClientLookupHandle* clh = (struct ClientLookupHandle*)cls;
1047 struct GNUNET_GNS_ClientLookupResultMessage *rmsg;
1050 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %d results\n",
1051 "LOOKUP_RESULT", rd_count);
1053 len = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
1054 rmsg = GNUNET_malloc(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
1056 rmsg->id = clh->unique_id;
1057 rmsg->rd_count = htonl(rd_count);
1058 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT);
1060 htons(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
1062 GNUNET_NAMESTORE_records_serialize (rd_count, rd, len, (char*)&rmsg[1]);
1064 GNUNET_SERVER_notification_context_unicast (nc, clh->client,
1065 (const struct GNUNET_MessageHeader *) rmsg,
1067 GNUNET_SERVER_receive_done (clh->client, GNUNET_OK);
1070 GNUNET_free(clh->name);
1072 if (NULL != clh->shorten_key)
1073 GNUNET_free(clh->shorten_key);
1077 GNUNET_STATISTICS_update (statistics,
1078 "Completed lookups", 1, GNUNET_NO);
1082 GNUNET_STATISTICS_update (statistics,
1083 "Records resolved", rd_count, GNUNET_NO);
1090 * Handle lookup requests from client
1092 * @param cls the closure
1093 * @param client the client
1094 * @param message the message
1097 handle_lookup(void *cls,
1098 struct GNUNET_SERVER_Client * client,
1099 const struct GNUNET_MessageHeader * message)
1101 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "LOOKUP");
1103 size_t msg_size = 0;
1105 char name[MAX_DNS_NAME_LENGTH];
1106 struct ClientLookupHandle *clh;
1107 char* nameptr = name;
1109 struct GNUNET_CRYPTO_RsaPrivateKey *key;
1110 struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *pkey;
1113 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientLookupMessage))
1115 GNUNET_break_op (0);
1116 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1120 GNUNET_SERVER_notification_context_add (nc, client);
1122 struct GNUNET_GNS_ClientLookupMessage *sh_msg =
1123 (struct GNUNET_GNS_ClientLookupMessage *) message;
1125 msg_size = ntohs(message->size);
1127 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
1129 GNUNET_break_op (0);
1130 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1134 if (1 == ntohl(sh_msg->have_key))
1136 pkey = (struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *)&sh_msg[1];
1137 tmp_pkey = (char*)&sh_msg[1];
1138 key = GNUNET_CRYPTO_rsa_decode_key (tmp_pkey, ntohs(pkey->len));
1139 GNUNET_STRINGS_utf8_tolower(&tmp_pkey[ntohs(pkey->len)], &nameptr);
1144 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
1147 namelen = strlen(name)+1;
1148 clh = GNUNET_malloc (sizeof (struct ClientLookupHandle));
1149 memset (clh, 0, sizeof (struct ClientLookupHandle));
1150 clh->client = client;
1151 clh->name = GNUNET_malloc(namelen);
1152 strcpy(clh->name, name);
1153 clh->unique_id = sh_msg->id;
1154 clh->type = ntohl(sh_msg->type);
1155 clh->shorten_key = key;
1157 only_cached = ntohl(sh_msg->only_cached);
1159 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
1160 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1161 "LOOKUP: %s is too long", name);
1163 send_lookup_response(clh, 0, NULL);
1167 if ((clh->type == GNUNET_GNS_RECORD_A) &&
1168 (GNUNET_OK != v4_enabled))
1170 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1171 "LOOKUP: Query for A record but AF_INET not supported!");
1173 send_lookup_response(clh, 0, NULL);
1177 if ((clh->type == GNUNET_GNS_RECORD_AAAA) &&
1178 (GNUNET_OK != v6_enabled))
1180 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1181 "LOOKUP: Query for AAAA record but AF_INET6 not supported!");
1183 send_lookup_response(clh, 0, NULL);
1187 if (1 == ntohl(sh_msg->use_default_zone))
1188 clh->zone = zone_hash; //Default zone
1190 clh->zone = sh_msg->zone;
1192 if (GNUNET_YES == auto_import_pkey)
1194 gns_resolver_lookup_record (clh->zone, clh->zone, clh->type, clh->name,
1196 default_lookup_timeout,
1198 &send_lookup_response, clh);
1202 gns_resolver_lookup_record (clh->zone, clh->zone, clh->type, name,
1204 default_lookup_timeout,
1206 &send_lookup_response, clh);
1209 GNUNET_STATISTICS_update (statistics,
1210 "Record lookup attempts", 1, GNUNET_NO);
1214 * Test if the given AF is supported by this system.
1217 * @return GNUNET_OK if the AF is supported
1224 s = socket (af, SOCK_STREAM, 0);
1227 if (EAFNOSUPPORT == errno)
1229 fprintf (stderr, "Failed to create test socket: %s\n", STRERROR (errno));
1230 return GNUNET_SYSERR;
1241 * Process GNS requests.
1243 * @param cls closure)
1244 * @param server the initialized server
1245 * @param c configuration to use
1248 run (void *cls, struct GNUNET_SERVER_Handle *server,
1249 const struct GNUNET_CONFIGURATION_Handle *c)
1252 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Initializing GNS\n");
1255 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
1256 unsigned long long max_parallel_bg_queries = 0;
1257 unsigned long long default_lookup_timeout_secs = 0;
1258 int ignore_pending = GNUNET_NO;
1260 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1261 {&handle_shorten, NULL, GNUNET_MESSAGE_TYPE_GNS_SHORTEN, 0},
1262 {&handle_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, 0},
1263 {&handle_get_authority, NULL, GNUNET_MESSAGE_TYPE_GNS_GET_AUTH, 0}
1268 v6_enabled = test_af (AF_INET6);
1269 v4_enabled = test_af (AF_INET);
1271 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (c, "gns",
1272 "ZONEKEY", &keyfile))
1274 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1275 "No private key for root zone specified!\n");
1276 GNUNET_SCHEDULER_shutdown ();
1280 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1281 "Using keyfile %s for root zone.\n", keyfile);
1283 zone_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
1284 GNUNET_CRYPTO_rsa_key_get_public (zone_key, &pkey);
1286 GNUNET_CRYPTO_short_hash(&pkey,
1287 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1289 GNUNET_free(keyfile);
1292 * handle to our local namestore
1294 namestore_handle = GNUNET_NAMESTORE_connect(c);
1296 if (NULL == namestore_handle)
1298 //FIXME do error handling;
1299 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1300 "Failed to connect to the namestore!\n");
1301 GNUNET_SCHEDULER_shutdown ();
1307 auto_import_pkey = GNUNET_NO;
1310 GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1311 "AUTO_IMPORT_PKEY"))
1313 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1314 "Automatic PKEY import is enabled.\n");
1315 auto_import_pkey = GNUNET_YES;
1319 zone_iteration_interval = INITIAL_ZONE_ITERATION_INTERVAL;
1321 record_put_interval = DEFAULT_RECORD_PUT_INTERVAL;
1324 GNUNET_CONFIGURATION_get_value_time (c, "gns",
1325 "RECORD_PUT_INTERVAL",
1326 &record_put_interval))
1328 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1329 "Record put interval: %llu\n",
1330 record_put_interval);
1334 GNUNET_CONFIGURATION_get_value_number (c, "gns",
1335 "MAX_PARALLEL_BACKGROUND_QUERIES",
1336 &max_parallel_bg_queries))
1338 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1339 "Number of allowed parallel background queries: %llu\n",
1340 max_parallel_bg_queries);
1344 GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1345 "AUTO_IMPORT_CONFIRMATION_REQ"))
1347 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1348 "Auto import requires user confirmation\n");
1349 ignore_pending = GNUNET_YES;
1353 GNUNET_CONFIGURATION_get_value_number(c, "gns",
1354 "DEFAULT_LOOKUP_TIMEOUT",
1355 &default_lookup_timeout_secs))
1357 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1358 "Default lookup timeout: %llus\n", default_lookup_timeout_secs);
1359 default_lookup_timeout = GNUNET_TIME_relative_multiply(
1360 GNUNET_TIME_UNIT_SECONDS,
1361 default_lookup_timeout_secs);
1367 dht_handle = GNUNET_DHT_connect(c,
1368 //max_parallel_bg_queries); //FIXME get ht_len from cfg
1371 if (NULL == dht_handle)
1373 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Could not connect to DHT!\n");
1376 if (gns_resolver_init(namestore_handle, dht_handle, zone_hash, c,
1377 max_parallel_bg_queries,
1381 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1382 "Unable to initialize resolver!\n");
1383 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
1388 GNUNET_CONFIGURATION_get_value_yesno (c, "gns", "HIJACK_DNS"))
1390 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1391 "DNS hijacking enabled... connecting to service.\n");
1393 if (gns_interceptor_init(zone_hash, zone_key, c) == GNUNET_SYSERR)
1395 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1396 "Failed to enable the dns interceptor!\n");
1401 * Schedule periodic put
1403 * We have roughly an hour for all records;
1405 first_zone_iteration = GNUNET_YES;
1406 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start, NULL);
1408 GNUNET_SERVER_add_handlers (server, handlers);
1411 //GNUNET_SERVER_disconnect_notify (server,
1412 // &client_disconnect_notification,
1415 statistics = GNUNET_STATISTICS_create ("gns", c);
1417 nc = GNUNET_SERVER_notification_context_create (server, 1);
1419 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
1425 * The main function for the GNS service.
1427 * @param argc number of arguments from the command line
1428 * @param argv command line arguments
1429 * @return 0 ok, 1 on error
1432 main (int argc, char *const *argv)
1438 GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
1443 /* end of gnunet-service-gns.c */