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"
42 /* FIXME move to proper header in include */
43 #define GNUNET_MESSAGE_TYPE_GNS_LOOKUP 23
44 #define GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT 24
45 #define GNUNET_MESSAGE_TYPE_GNS_SHORTEN 25
46 #define GNUNET_MESSAGE_TYPE_GNS_SHORTEN_RESULT 26
47 #define GNUNET_MESSAGE_TYPE_GNS_GET_AUTH 27
48 #define GNUNET_MESSAGE_TYPE_GNS_GET_AUTH_RESULT 28
51 #define INITIAL_ZONE_ITERATION_INTERVAL GNUNET_TIME_UNIT_MILLISECONDS
52 #define MINIMUM_ZONE_ITERATION_INTERVAL GNUNET_TIME_UNIT_SECONDS
53 #define DEFAULT_RECORD_PUT_INTERVAL GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 4)
56 * Handle to a shorten operation from api
58 struct ClientShortenHandle
62 struct ClientShortenHandle *next;
65 struct ClientShortenHandle *prev;
67 /* the requesting client that */
68 struct GNUNET_SERVER_Client *client;
74 enum GNUNET_GNS_RecordType type;
77 char name[MAX_DNS_NAME_LENGTH];
79 /* name of private zone (relative to root) */
80 char private_zone_id[MAX_DNS_NAME_LENGTH];
82 /* name of shorten zone (relative to root) */
83 char shorten_zone_id[MAX_DNS_NAME_LENGTH];
86 struct GNUNET_CRYPTO_ShortHashCode root_zone;
89 struct GNUNET_CRYPTO_ShortHashCode private_zone;
92 struct GNUNET_CRYPTO_ShortHashCode shorten_zone;
94 /* Namestore lookup task */
95 struct GNUNET_NAMESTORE_QueueEntry *namestore_task;
101 * Handle to a get auhtority operation from api
103 struct ClientGetAuthHandle
105 /* the requesting client that */
106 struct GNUNET_SERVER_Client *client;
111 /* name to lookup authority */
118 * Handle to a lookup operation from api
120 struct ClientLookupHandle
123 /* the requesting client that */
124 struct GNUNET_SERVER_Client *client;
126 /* The zone we look up in */
127 struct GNUNET_CRYPTO_ShortHashCode zone;
129 /* Do we only want to lookup from local cache? */
136 enum GNUNET_GNS_RecordType type;
138 /* optional zone private key used for shorten */
139 struct GNUNET_CRYPTO_RsaPrivateKey *shorten_key;
141 /* the name to look up */
142 char* name; //Needed?
146 * Our handle to the DHT
148 static struct GNUNET_DHT_Handle *dht_handle;
151 * Our zone's private key
153 struct GNUNET_CRYPTO_RsaPrivateKey *zone_key;
156 * Our handle to the namestore service
157 * FIXME maybe need a second handle for iteration
159 struct GNUNET_NAMESTORE_Handle *namestore_handle;
162 * Handle to iterate over our authoritative zone in namestore
164 struct GNUNET_NAMESTORE_ZoneIterator *namestore_iter;
167 * The configuration the GNS service is running with
169 const struct GNUNET_CONFIGURATION_Handle *GNS_cfg;
172 * Our notification context.
174 static struct GNUNET_SERVER_NotificationContext *nc;
179 struct GNUNET_CRYPTO_ShortHashCode zone_hash;
182 * Useful for zone update for DHT put
184 static unsigned long long num_public_records;
187 * Last seen record count
189 static unsigned long long last_num_public_records;
191 static struct GNUNET_TIME_Relative zone_iteration_interval;
193 /* dht update interval FIXME define? */
194 static struct GNUNET_TIME_Relative record_put_interval;
196 /* zone update task */
197 GNUNET_SCHEDULER_TaskIdentifier zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
199 /* automatic pkey import for name shortening */
200 static int auto_import_pkey;
203 static struct GNUNET_TIME_Relative default_lookup_timeout;
206 static int v6_enabled;
209 static int v4_enabled;
211 /* Shorten DLL for cancelling NS requests */
212 static struct ClientShortenHandle *csh_head;
214 /* Shorten DLL for cancelling NS requests */
215 static struct ClientShortenHandle *csh_tail;
217 /* Statistics handle */
218 static struct GNUNET_STATISTICS_Handle *statistics;
221 * Send shorten response back to client
223 * @param cls the closure containing a client shorten handle
224 * @param name the shortened name result or NULL if cannot be shortened
227 send_shorten_response(void* cls, const char* name);
234 on_resolver_cleanup(void)
236 if (NULL != statistics)
237 GNUNET_STATISTICS_destroy (statistics, GNUNET_NO);
239 if (NULL != namestore_iter)
240 GNUNET_NAMESTORE_zone_iteration_stop (namestore_iter);
241 GNUNET_NAMESTORE_disconnect(namestore_handle);
242 GNUNET_DHT_disconnect(dht_handle);
246 * Task run during shutdown.
252 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
254 struct ClientShortenHandle *csh_tmp = csh_head;
256 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
259 while (csh_tmp != NULL)
261 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh_tmp);
262 send_shorten_response (csh_tmp, csh_tmp->name);
265 GNUNET_SERVER_notification_context_destroy (nc);
267 gns_interceptor_stop();
268 gns_resolver_cleanup(&on_resolver_cleanup);
269 /* Kill zone task for it may make the scheduler hang */
270 if (zone_update_taskid != GNUNET_SCHEDULER_NO_TASK)
271 GNUNET_SCHEDULER_cancel(zone_update_taskid);
276 * Method called periodicattluy that triggers
277 * iteration over root zone
280 * @param tc task context
283 update_zone_dht_next(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
285 zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
286 GNUNET_NAMESTORE_zone_iterator_next (namestore_iter);
290 * Continuation for DHT put
293 * @param success GNUNET_OK if the PUT was transmitted,
294 * GNUNET_NO on timeout,
295 * GNUNET_SYSERR on disconnect from service
296 * after the PUT message was transmitted
297 * (so we don't know if it was received or not)
300 record_dht_put(void *cls, int success)
302 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "put request transmitted\n");
307 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
310 * Function used to put all records successively into the DHT.
312 * @param cls the closure (NULL)
313 * @param key the public key of the authority (ours)
314 * @param expiration lifetime of the namestore entry
315 * @param name the name of the records
316 * @param rd_count the number of records in data
317 * @param rd the record data
318 * @param signature the signature for the record data
321 put_gns_record(void *cls,
322 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
323 struct GNUNET_TIME_Absolute expiration,
325 unsigned int rd_count,
326 const struct GNUNET_NAMESTORE_RecordData *rd,
327 const struct GNUNET_CRYPTO_RsaSignature *signature)
330 struct GNSNameRecordBlock *nrb;
331 struct GNUNET_CRYPTO_ShortHashCode name_hash;
332 struct GNUNET_CRYPTO_ShortHashCode zhash;
333 struct GNUNET_HashCode xor_hash;
334 struct GNUNET_HashCode name_hash_double;
335 struct GNUNET_HashCode zone_hash_double;
336 uint32_t rd_payload_length;
337 char* nrb_data = NULL;
339 int interval_adjustment = 1;
340 struct GNUNET_TIME_Relative next_put_interval;
347 if (0 == num_public_records)
350 * If no records are known (startup) or none present
351 * we can safely set the interval to the value for a single
354 zone_iteration_interval = GNUNET_TIME_relative_divide (record_put_interval,
357 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
358 "No records in db.\n");
362 zone_iteration_interval = GNUNET_TIME_relative_divide (record_put_interval,
366 zone_iteration_interval = GNUNET_TIME_relative_max (MINIMUM_ZONE_ITERATION_INTERVAL,
367 zone_iteration_interval);
369 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
370 "Adjusted zone iteration interval to %llus!\n",
371 zone_iteration_interval.rel_value);
372 GNUNET_STATISTICS_set (statistics,
373 "Current zone iteration interval [msec]",
374 zone_iteration_interval.rel_value,
377 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
378 "Zone iteration finished. Rescheduling zone iteration\n");
380 namestore_iter = NULL;
381 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start, NULL);
382 GNUNET_STATISTICS_update (statistics,
383 "Number of zone iterations", 1, GNUNET_NO);
385 last_num_public_records = num_public_records;
386 GNUNET_STATISTICS_set (statistics,
387 "Number of public records in DHT",
388 last_num_public_records,
393 namelen = strlen(name) + 1;
397 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
398 "No records given for name %s! Skipping...\n",
400 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
405 if (signature == NULL)
407 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
408 "No signature for %s record data provided! Skipping...\n",
410 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
416 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
417 "Putting records for %s into the DHT\n", name);
419 rd_payload_length = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
421 nrb = GNUNET_malloc(rd_payload_length + namelen
422 + sizeof(struct GNSNameRecordBlock));
424 nrb->signature = *signature;
426 nrb->public_key = *key;
428 nrb->rd_count = htonl(rd_count);
430 memcpy(&nrb[1], name, namelen);
432 nrb_data = (char*)&nrb[1];
435 rd_payload_length += sizeof(struct GNSNameRecordBlock) + namelen;
437 if (-1 == GNUNET_NAMESTORE_records_serialize (rd_count,
442 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
443 "Record serialization failed! Skipping...\n");
445 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
452 * calculate DHT key: H(name) xor H(pubkey)
454 GNUNET_CRYPTO_short_hash(key,
455 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
457 GNUNET_CRYPTO_short_hash(name, strlen(name), &name_hash);
458 GNUNET_CRYPTO_short_hash_double (&name_hash, &name_hash_double);
459 GNUNET_CRYPTO_short_hash_double (&zhash, &zone_hash_double);
460 GNUNET_CRYPTO_hash_xor(&zone_hash_double, &name_hash_double, &xor_hash);
462 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
463 "zone identity: %s\n", GNUNET_h2s (&zone_hash_double));
465 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
466 "putting %d records for %s under key: %s with size %d\n",
467 rd_count, name, GNUNET_h2s (&xor_hash), rd_payload_length);
469 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
470 "DHT req to %d\n", DHT_OPERATION_TIMEOUT.rel_value);
472 GNUNET_STATISTICS_update (statistics,
473 "Record bytes put into DHT", rd_payload_length, GNUNET_NO);
475 /* FIXME: keep return value to possibly cancel? */
476 GNUNET_DHT_put (dht_handle, &xor_hash,
477 DHT_GNS_REPLICATION_LEVEL,
479 GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
483 DHT_OPERATION_TIMEOUT,
485 NULL); //cls for cont
487 num_public_records++;
489 if (num_public_records > last_num_public_records)
491 interval_adjustment = ceil ((double)num_public_records / (double)last_num_public_records);
492 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
493 "Last record count was lower than current record count... increasing.\n");
494 next_put_interval = GNUNET_TIME_relative_divide (zone_iteration_interval,
495 interval_adjustment);
499 next_put_interval = zone_iteration_interval;
501 GNUNET_STATISTICS_set (statistics,
502 "Current zone iteration interval [msec]",
503 next_put_interval.rel_value,
507 * Reschedule periodic put
509 zone_update_taskid = GNUNET_SCHEDULER_add_delayed (next_put_interval,
510 &update_zone_dht_next,
518 * Periodically iterate over our zone and store everything in dht
521 * @param tc task context
524 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
526 zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
528 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Scheduling DHT zone update!\n");
530 /* start counting again */
531 num_public_records = 0;
532 namestore_iter = GNUNET_NAMESTORE_zone_iteration_start (namestore_handle,
534 GNUNET_NAMESTORE_RF_AUTHORITY,
535 GNUNET_NAMESTORE_RF_PRIVATE,
540 /* END DHT ZONE PROPAGATION */
543 * Send shorten response back to client
545 * @param cls the closure containing a client shorten handle
546 * @param name the shortened name result or NULL if cannot be shortened
549 send_shorten_response(void* cls, const char* name)
551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
552 "SHORTEN_RESULT", name);
553 struct GNUNET_GNS_ClientShortenResultMessage *rmsg;
554 struct ClientShortenHandle *csh = (struct ClientShortenHandle *)cls;
561 GNUNET_STATISTICS_update (statistics,
562 "Name shorten results", 1, GNUNET_NO);
564 rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientShortenResultMessage)
567 rmsg->id = csh->unique_id;
568 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_SHORTEN_RESULT);
570 htons(sizeof(struct GNUNET_GNS_ClientShortenResultMessage) +
573 strcpy((char*)&rmsg[1], name);
575 GNUNET_SERVER_notification_context_unicast (nc, csh->client,
576 (const struct GNUNET_MessageHeader *) rmsg,
578 GNUNET_SERVER_receive_done (csh->client, GNUNET_OK);
580 if (NULL != csh->namestore_task)
581 GNUNET_NAMESTORE_cancel (csh->namestore_task);
590 * Lookup the zone infos and shorten name
592 * @param cls the client shorten handle
593 * @param key key of the zone
594 * @param expiration expiration of record
595 * @param name name found or null if no result
596 * @param rd_count number of records found
597 * @param rd record data
602 process_shorten_in_private_zone_lookup (void *cls,
603 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
604 struct GNUNET_TIME_Absolute expiration,
606 unsigned int rd_count,
607 const struct GNUNET_NAMESTORE_RecordData *rd,
608 const struct GNUNET_CRYPTO_RsaSignature *signature)
610 struct ClientShortenHandle *csh = cls;
611 csh->namestore_task = NULL;
612 struct GNUNET_CRYPTO_ShortHashCode *szone = &csh->shorten_zone;
613 struct GNUNET_CRYPTO_ShortHashCode *pzone = &csh->private_zone;
615 if (0 == strcmp (csh->private_zone_id, ""))
620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
621 "No shorten zone in private zone!\n");
623 strcpy (csh->shorten_zone_id, "");
630 GNUNET_assert (rd_count == 1);
632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
633 "Shorten zone %s found in private zone %s\n",
634 name, csh->private_zone_id);
636 sprintf (csh->shorten_zone_id, "%s.%s", name, csh->private_zone_id);
639 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
641 gns_resolver_shorten_name (&csh->root_zone,
645 csh->private_zone_id,
646 csh->shorten_zone_id,
647 &send_shorten_response, csh);
653 * Lookup the zone infos and shorten name
655 * @param cls the shorten handle
656 * @param key key of the zone
657 * @param expiration expiration of record
658 * @param name name found or null if no result
659 * @param rd_count number of records found
660 * @param rd record data
665 process_shorten_in_root_zone_lookup (void *cls,
666 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
667 struct GNUNET_TIME_Absolute expiration,
669 unsigned int rd_count,
670 const struct GNUNET_NAMESTORE_RecordData *rd,
671 const struct GNUNET_CRYPTO_RsaSignature *signature)
673 struct ClientShortenHandle *csh = cls;
674 csh->namestore_task = NULL;
675 struct GNUNET_CRYPTO_ShortHashCode *szone = &csh->shorten_zone;
676 struct GNUNET_CRYPTO_ShortHashCode *pzone = &csh->private_zone;
678 if (0 == strcmp (csh->private_zone_id, ""))
683 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
684 "No shorten zone in zone and no private zone!\n");
686 strcpy (csh->shorten_zone_id, "");
688 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
691 gns_resolver_shorten_name (&csh->root_zone,
695 csh->private_zone_id,
696 csh->shorten_zone_id,
697 &send_shorten_response, csh);
701 GNUNET_assert (rd_count == 1);
703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
704 "Private zone %s found in root zone\n", name);
706 strcpy (csh->private_zone_id, name);
708 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
711 &process_shorten_in_private_zone_lookup,
717 * Lookup the zone infos and shorten name
719 * @param cls the shorten handle
720 * @param key key of the zone
721 * @param expiration expiration of record
722 * @param name name found or null if no result
723 * @param rd_count number of records found
724 * @param rd record data
729 process_private_in_root_zone_lookup (void *cls,
730 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
731 struct GNUNET_TIME_Absolute expiration,
733 unsigned int rd_count,
734 const struct GNUNET_NAMESTORE_RecordData *rd,
735 const struct GNUNET_CRYPTO_RsaSignature *signature)
737 struct ClientShortenHandle *csh = cls;
738 csh->namestore_task = NULL;
742 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
743 "No private zone in root zone\n");
745 strcpy (csh->private_zone_id, "");
747 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
750 &process_shorten_in_root_zone_lookup,
755 GNUNET_assert (rd_count == 1);
757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
758 "Private zone %s found in root zone\n", name);
760 strcpy (csh->private_zone_id, name);
762 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
765 &process_shorten_in_private_zone_lookup,
770 * Lookup the zone infos and shorten name
772 * @param csh the shorten handle
776 start_shorten_name (struct ClientShortenHandle *csh)
778 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
779 "Looking for private zone name in root zone\n");
781 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
784 &process_private_in_root_zone_lookup,
790 * Handle a shorten message from the api
792 * @param cls the closure
793 * @param client the client
794 * @param message the message
796 static void handle_shorten (void *cls,
797 struct GNUNET_SERVER_Client * client,
798 const struct GNUNET_MessageHeader * message)
800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "SHORTEN");
803 struct ClientShortenHandle *csh;
804 char name[MAX_DNS_NAME_LENGTH];
805 char* nameptr = name;
807 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientShortenMessage))
810 GNUNET_SERVER_receive_done (client, GNUNET_OK);
815 struct GNUNET_GNS_ClientShortenMessage *sh_msg =
816 (struct GNUNET_GNS_ClientShortenMessage *) message;
818 msg_size = ntohs(message->size);
820 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
823 GNUNET_SERVER_receive_done (client, GNUNET_OK);
827 csh = GNUNET_malloc(sizeof(struct ClientShortenHandle));
828 csh->client = client;
829 csh->unique_id = sh_msg->id;
831 GNUNET_CONTAINER_DLL_insert (csh_head, csh_tail, csh);
833 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
835 if (strlen (name) < strlen(GNUNET_GNS_TLD)) {
836 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
837 "SHORTEN: %s is too short", name);
838 send_shorten_response(csh, name);
842 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
843 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
844 "SHORTEN: %s is too long", name);
845 send_shorten_response(csh, name);
849 if (!is_gnunet_tld(name) && !is_zkey_tld(name))
851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
852 "%s is not our domain. Returning\n", name);
853 send_shorten_response(csh, name);
857 csh->shorten_zone = sh_msg->shorten_zone;
858 csh->private_zone = sh_msg->private_zone;
860 strcpy (csh->name, name);
862 GNUNET_SERVER_notification_context_add (nc, client);
864 if (1 == ntohl(sh_msg->use_default_zone))
865 csh->root_zone = zone_hash; //Default zone
867 csh->root_zone = sh_msg->zone;
869 start_shorten_name (csh);
871 GNUNET_STATISTICS_update (statistics,
872 "Name shorten attempts", 1, GNUNET_NO);
878 * Send get authority response back to client
880 * @param cls the closure containing a client get auth handle
881 * @param name the shortened name result or NULL if cannot be shortened
884 send_get_auth_response(void *cls, const char* name)
886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
887 "GET_AUTH_RESULT", name);
888 struct GNUNET_GNS_ClientGetAuthResultMessage *rmsg;
889 struct ClientGetAuthHandle *cah = (struct ClientGetAuthHandle *)cls;
893 GNUNET_STATISTICS_update (statistics,
894 "Authorities resolved", 1, GNUNET_NO);
902 rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage)
905 rmsg->id = cah->unique_id;
906 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_GET_AUTH_RESULT);
908 htons(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage) +
911 strcpy((char*)&rmsg[1], name);
913 GNUNET_SERVER_notification_context_unicast (nc, cah->client,
914 (const struct GNUNET_MessageHeader *) rmsg,
916 GNUNET_SERVER_receive_done (cah->client, GNUNET_OK);
919 GNUNET_free_non_null(cah->name);
928 * Handle a get authority message from the api
930 * @param cls the closure
931 * @param client the client
932 * @param message the message
934 static void handle_get_authority(void *cls,
935 struct GNUNET_SERVER_Client * client,
936 const struct GNUNET_MessageHeader * message)
938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "GET_AUTH");
941 struct ClientGetAuthHandle *cah;
942 char name[MAX_DNS_NAME_LENGTH];
943 char* nameptr = name;
946 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientGetAuthMessage))
949 GNUNET_SERVER_receive_done (client, GNUNET_OK);
953 GNUNET_SERVER_notification_context_add (nc, client);
955 struct GNUNET_GNS_ClientGetAuthMessage *sh_msg =
956 (struct GNUNET_GNS_ClientGetAuthMessage *) message;
958 msg_size = ntohs(message->size);
960 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
963 GNUNET_SERVER_receive_done (client, GNUNET_OK);
967 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
970 cah = GNUNET_malloc(sizeof(struct ClientGetAuthHandle));
971 cah->client = client;
972 cah->unique_id = sh_msg->id;
974 if (strlen(name) < strlen(GNUNET_GNS_TLD))
976 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
977 "GET_AUTH: %s is too short. Returning\n", name);
979 send_get_auth_response(cah, name);
983 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
984 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
985 "GET_AUTH: %s is too long", name);
987 send_get_auth_response(cah, name);
991 if (strcmp(name+strlen(name)-strlen(GNUNET_GNS_TLD),
992 GNUNET_GNS_TLD) != 0)
994 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
995 "GET_AUTH: %s is not our domain. Returning\n", name);
997 send_get_auth_response(cah, name);
1001 if (strcmp(name, GNUNET_GNS_TLD) == 0)
1003 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1004 "GET_AUTH: %s is us. Returning\n", name);
1006 send_get_auth_response(cah, name);
1010 cah->name = GNUNET_malloc(strlen(name)
1011 - strlen(GNUNET_GNS_TLD) + 1);
1012 memset(cah->name, 0,
1013 strlen(name)-strlen(GNUNET_GNS_TLD) + 1);
1014 memcpy(cah->name, name,
1015 strlen(name)-strlen(GNUNET_GNS_TLD));
1017 /* Start delegation resolution in our namestore */
1018 gns_resolver_get_authority(zone_hash, zone_hash, name, &send_get_auth_response, cah);
1020 GNUNET_STATISTICS_update (statistics,
1021 "Authority lookup attempts", 1, GNUNET_NO);
1027 * Reply to client with the result from our lookup.
1029 * @param cls the closure (our client lookup handle)
1030 * @param rd_count the number of records
1031 * @param rd the record data
1034 send_lookup_response(void* cls,
1036 const struct GNUNET_NAMESTORE_RecordData *rd)
1038 struct ClientLookupHandle* clh = (struct ClientLookupHandle*)cls;
1039 struct GNUNET_GNS_ClientLookupResultMessage *rmsg;
1042 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %d results\n",
1043 "LOOKUP_RESULT", rd_count);
1045 len = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
1046 rmsg = GNUNET_malloc(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
1048 rmsg->id = clh->unique_id;
1049 rmsg->rd_count = htonl(rd_count);
1050 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT);
1052 htons(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
1054 GNUNET_NAMESTORE_records_serialize (rd_count, rd, len, (char*)&rmsg[1]);
1056 GNUNET_SERVER_notification_context_unicast (nc, clh->client,
1057 (const struct GNUNET_MessageHeader *) rmsg,
1059 GNUNET_SERVER_receive_done (clh->client, GNUNET_OK);
1062 GNUNET_free(clh->name);
1064 if (NULL != clh->shorten_key)
1065 GNUNET_free(clh->shorten_key);
1069 GNUNET_STATISTICS_update (statistics,
1070 "Completed lookups", 1, GNUNET_NO);
1074 GNUNET_STATISTICS_update (statistics,
1075 "Records resolved", rd_count, GNUNET_NO);
1082 * Handle lookup requests from client
1084 * @param cls the closure
1085 * @param client the client
1086 * @param message the message
1089 handle_lookup(void *cls,
1090 struct GNUNET_SERVER_Client * client,
1091 const struct GNUNET_MessageHeader * message)
1093 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "LOOKUP");
1095 size_t msg_size = 0;
1097 char name[MAX_DNS_NAME_LENGTH];
1098 struct ClientLookupHandle *clh;
1099 char* nameptr = name;
1101 struct GNUNET_CRYPTO_RsaPrivateKey *key;
1102 struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *pkey;
1105 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientLookupMessage))
1107 GNUNET_break_op (0);
1108 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1112 GNUNET_SERVER_notification_context_add (nc, client);
1114 struct GNUNET_GNS_ClientLookupMessage *sh_msg =
1115 (struct GNUNET_GNS_ClientLookupMessage *) message;
1117 msg_size = ntohs(message->size);
1119 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
1121 GNUNET_break_op (0);
1122 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1126 if (1 == ntohl(sh_msg->have_key))
1128 pkey = (struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *)&sh_msg[1];
1129 tmp_pkey = (char*)&sh_msg[1];
1130 key = GNUNET_CRYPTO_rsa_decode_key (tmp_pkey, ntohs(pkey->len));
1131 GNUNET_STRINGS_utf8_tolower(&tmp_pkey[ntohs(pkey->len)], &nameptr);
1136 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
1139 namelen = strlen(name)+1;
1140 clh = GNUNET_malloc (sizeof (struct ClientLookupHandle));
1141 memset (clh, 0, sizeof (struct ClientLookupHandle));
1142 clh->client = client;
1143 clh->name = GNUNET_malloc(namelen);
1144 strcpy(clh->name, name);
1145 clh->unique_id = sh_msg->id;
1146 clh->type = ntohl(sh_msg->type);
1147 clh->shorten_key = key;
1149 only_cached = ntohl(sh_msg->only_cached);
1151 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
1152 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1153 "LOOKUP: %s is too long", name);
1155 send_lookup_response(clh, 0, NULL);
1159 if ((clh->type == GNUNET_GNS_RECORD_A) &&
1160 (GNUNET_OK != v4_enabled))
1162 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1163 "LOOKUP: Query for A record but AF_INET not supported!");
1165 send_lookup_response(clh, 0, NULL);
1169 if ((clh->type == GNUNET_GNS_RECORD_AAAA) &&
1170 (GNUNET_OK != v6_enabled))
1172 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1173 "LOOKUP: Query for AAAA record but AF_INET6 not supported!");
1175 send_lookup_response(clh, 0, NULL);
1179 if (1 == ntohl(sh_msg->use_default_zone))
1180 clh->zone = zone_hash; //Default zone
1182 clh->zone = sh_msg->zone;
1184 if (GNUNET_YES == auto_import_pkey)
1186 gns_resolver_lookup_record (clh->zone, clh->zone, clh->type, clh->name,
1188 default_lookup_timeout,
1190 &send_lookup_response, clh);
1194 gns_resolver_lookup_record (clh->zone, clh->zone, clh->type, name,
1196 default_lookup_timeout,
1198 &send_lookup_response, clh);
1201 GNUNET_STATISTICS_update (statistics,
1202 "Record lookup attempts", 1, GNUNET_NO);
1206 * Test if the given AF is supported by this system.
1209 * @return GNUNET_OK if the AF is supported
1216 s = socket (af, SOCK_STREAM, 0);
1219 if (EAFNOSUPPORT == errno)
1221 fprintf (stderr, "Failed to create test socket: %s\n", STRERROR (errno));
1222 return GNUNET_SYSERR;
1233 * Process GNS requests.
1235 * @param cls closure)
1236 * @param server the initialized server
1237 * @param c configuration to use
1240 run (void *cls, struct GNUNET_SERVER_Handle *server,
1241 const struct GNUNET_CONFIGURATION_Handle *c)
1244 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Initializing GNS\n");
1247 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
1248 unsigned long long max_parallel_bg_queries = 0;
1249 unsigned long long default_lookup_timeout_secs = 0;
1250 int ignore_pending = GNUNET_NO;
1252 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1253 {&handle_shorten, NULL, GNUNET_MESSAGE_TYPE_GNS_SHORTEN, 0},
1254 {&handle_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, 0},
1255 {&handle_get_authority, NULL, GNUNET_MESSAGE_TYPE_GNS_GET_AUTH, 0}
1260 v6_enabled = test_af (AF_INET6);
1261 v4_enabled = test_af (AF_INET);
1263 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (c, "gns",
1264 "ZONEKEY", &keyfile))
1266 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1267 "No private key for root zone specified!\n");
1268 GNUNET_SCHEDULER_shutdown ();
1272 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1273 "Using keyfile %s for root zone.\n", keyfile);
1275 zone_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
1276 GNUNET_CRYPTO_rsa_key_get_public (zone_key, &pkey);
1278 GNUNET_CRYPTO_short_hash(&pkey,
1279 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1281 GNUNET_free(keyfile);
1284 * handle to our local namestore
1286 namestore_handle = GNUNET_NAMESTORE_connect(c);
1288 if (NULL == namestore_handle)
1290 //FIXME do error handling;
1291 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1292 "Failed to connect to the namestore!\n");
1293 GNUNET_SCHEDULER_shutdown ();
1299 auto_import_pkey = GNUNET_NO;
1302 GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1303 "AUTO_IMPORT_PKEY"))
1305 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1306 "Automatic PKEY import is enabled.\n");
1307 auto_import_pkey = GNUNET_YES;
1311 zone_iteration_interval = INITIAL_ZONE_ITERATION_INTERVAL;
1313 record_put_interval = DEFAULT_RECORD_PUT_INTERVAL;
1316 GNUNET_CONFIGURATION_get_value_time (c, "gns",
1317 "RECORD_PUT_INTERVAL",
1318 &record_put_interval))
1320 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1321 "Record put interval: %llu\n",
1322 record_put_interval);
1326 GNUNET_CONFIGURATION_get_value_number (c, "gns",
1327 "MAX_PARALLEL_BACKGROUND_QUERIES",
1328 &max_parallel_bg_queries))
1330 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1331 "Number of allowed parallel background queries: %llu\n",
1332 max_parallel_bg_queries);
1336 GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1337 "AUTO_IMPORT_CONFIRMATION_REQ"))
1339 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1340 "Auto import requires user confirmation\n");
1341 ignore_pending = GNUNET_YES;
1345 GNUNET_CONFIGURATION_get_value_number(c, "gns",
1346 "DEFAULT_LOOKUP_TIMEOUT",
1347 &default_lookup_timeout_secs))
1349 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1350 "Default lookup timeout: %llus\n", default_lookup_timeout_secs);
1351 default_lookup_timeout = GNUNET_TIME_relative_multiply(
1352 GNUNET_TIME_UNIT_SECONDS,
1353 default_lookup_timeout_secs);
1359 dht_handle = GNUNET_DHT_connect(c,
1360 //max_parallel_bg_queries); //FIXME get ht_len from cfg
1363 if (NULL == dht_handle)
1365 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Could not connect to DHT!\n");
1368 if (gns_resolver_init(namestore_handle, dht_handle, zone_hash, c,
1369 max_parallel_bg_queries,
1373 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1374 "Unable to initialize resolver!\n");
1375 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
1380 GNUNET_CONFIGURATION_get_value_yesno (c, "gns", "HIJACK_DNS"))
1382 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1383 "DNS hijacking enabled... connecting to service.\n");
1385 if (gns_interceptor_init(zone_hash, zone_key, c) == GNUNET_SYSERR)
1387 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1388 "Failed to enable the dns interceptor!\n");
1393 * Schedule periodic put
1395 * We have roughly an hour for all records;
1397 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start, NULL);
1399 GNUNET_SERVER_add_handlers (server, handlers);
1402 //GNUNET_SERVER_disconnect_notify (server,
1403 // &client_disconnect_notification,
1406 statistics = GNUNET_STATISTICS_create ("gns", c);
1408 nc = GNUNET_SERVER_notification_context_create (server, 1);
1410 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
1416 * The main function for the GNS service.
1418 * @param argc number of arguments from the command line
1419 * @param argv command line arguments
1420 * @return 0 ok, 1 on error
1423 main (int argc, char *const *argv)
1429 GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
1434 /* end of gnunet-service-gns.c */