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"
41 /* FIXME move to proper header in include */
42 #define GNUNET_MESSAGE_TYPE_GNS_LOOKUP 23
43 #define GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT 24
44 #define GNUNET_MESSAGE_TYPE_GNS_SHORTEN 25
45 #define GNUNET_MESSAGE_TYPE_GNS_SHORTEN_RESULT 26
46 #define GNUNET_MESSAGE_TYPE_GNS_GET_AUTH 27
47 #define GNUNET_MESSAGE_TYPE_GNS_GET_AUTH_RESULT 28
51 * Handle to a shorten operation from api
53 struct ClientShortenHandle
57 struct ClientShortenHandle *next;
60 struct ClientShortenHandle *prev;
62 /* the requesting client that */
63 struct GNUNET_SERVER_Client *client;
69 enum GNUNET_GNS_RecordType type;
72 char name[MAX_DNS_NAME_LENGTH];
74 /* name of private zone (relative to root) */
75 char private_zone_id[MAX_DNS_NAME_LENGTH];
77 /* name of shorten zone (relative to root) */
78 char shorten_zone_id[MAX_DNS_NAME_LENGTH];
81 struct GNUNET_CRYPTO_ShortHashCode root_zone;
84 struct GNUNET_CRYPTO_ShortHashCode private_zone;
87 struct GNUNET_CRYPTO_ShortHashCode shorten_zone;
89 /* Namestore lookup task */
90 struct GNUNET_NAMESTORE_QueueEntry *namestore_task;
96 * Handle to a get auhtority operation from api
98 struct ClientGetAuthHandle
100 /* the requesting client that */
101 struct GNUNET_SERVER_Client *client;
106 /* name to lookup authority */
113 * Handle to a lookup operation from api
115 struct ClientLookupHandle
118 /* the requesting client that */
119 struct GNUNET_SERVER_Client *client;
121 /* The zone we look up in */
122 struct GNUNET_CRYPTO_ShortHashCode zone;
124 /* Do we only want to lookup from local cache? */
131 enum GNUNET_GNS_RecordType type;
133 /* optional zone private key used for shorten */
134 struct GNUNET_CRYPTO_RsaPrivateKey *shorten_key;
136 /* the name to look up */
137 char* name; //Needed?
141 * Our handle to the DHT
143 static struct GNUNET_DHT_Handle *dht_handle;
146 * Our zone's private key
148 struct GNUNET_CRYPTO_RsaPrivateKey *zone_key;
151 * Our handle to the namestore service
152 * FIXME maybe need a second handle for iteration
154 struct GNUNET_NAMESTORE_Handle *namestore_handle;
157 * Handle to iterate over our authoritative zone in namestore
159 struct GNUNET_NAMESTORE_ZoneIterator *namestore_iter;
162 * The configuration the GNS service is running with
164 const struct GNUNET_CONFIGURATION_Handle *GNS_cfg;
167 * Our notification context.
169 static struct GNUNET_SERVER_NotificationContext *nc;
174 struct GNUNET_CRYPTO_ShortHashCode zone_hash;
177 * Useful for zone update for DHT put
179 static int num_public_records;
182 * update interval in seconds
184 static unsigned long long max_record_put_interval;
186 static struct GNUNET_TIME_Relative dht_max_update_interval;
188 /* dht update interval FIXME define? */
189 static struct GNUNET_TIME_Relative record_put_interval;
191 /* zone update task */
192 GNUNET_SCHEDULER_TaskIdentifier zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
194 /* automatic pkey import for name shortening */
195 static int auto_import_pkey;
198 static struct GNUNET_TIME_Relative default_lookup_timeout;
201 static int v6_enabled;
204 static int v4_enabled;
206 /* Shorten DLL for cancelling NS requests */
207 static struct ClientShortenHandle *csh_head;
209 /* Shorten DLL for cancelling NS requests */
210 static struct ClientShortenHandle *csh_tail;
212 /* Statistics handle */
213 static struct GNUNET_STATISTICS_Handle *statistics;
216 * Send shorten response back to client
218 * @param cls the closure containing a client shorten handle
219 * @param name the shortened name result or NULL if cannot be shortened
222 send_shorten_response(void* cls, const char* name);
229 on_resolver_cleanup(void)
231 if (NULL != statistics)
232 GNUNET_STATISTICS_destroy (statistics, GNUNET_NO);
234 if (NULL != namestore_iter)
235 GNUNET_NAMESTORE_zone_iteration_stop (namestore_iter);
236 GNUNET_NAMESTORE_disconnect(namestore_handle);
237 GNUNET_DHT_disconnect(dht_handle);
241 * Task run during shutdown.
247 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
249 struct ClientShortenHandle *csh_tmp = csh_head;
251 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
254 while (csh_tmp != NULL)
256 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh_tmp);
257 send_shorten_response (csh_tmp, csh_tmp->name);
260 GNUNET_SERVER_notification_context_destroy (nc);
262 gns_interceptor_stop();
263 gns_resolver_cleanup(&on_resolver_cleanup);
264 /* Kill zone task for it may make the scheduler hang */
265 if (zone_update_taskid != GNUNET_SCHEDULER_NO_TASK)
266 GNUNET_SCHEDULER_cancel(zone_update_taskid);
271 * Method called periodicattluy that triggers
272 * iteration over root zone
275 * @param tc task context
278 update_zone_dht_next(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
280 zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
281 GNUNET_NAMESTORE_zone_iterator_next (namestore_iter);
285 * Continuation for DHT put
288 * @param success GNUNET_OK if the PUT was transmitted,
289 * GNUNET_NO on timeout,
290 * GNUNET_SYSERR on disconnect from service
291 * after the PUT message was transmitted
292 * (so we don't know if it was received or not)
295 record_dht_put(void *cls, int success)
297 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "put request transmitted\n");
302 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
305 * Function used to put all records successively into the DHT.
307 * @param cls the closure (NULL)
308 * @param key the public key of the authority (ours)
309 * @param expiration lifetime of the namestore entry
310 * @param name the name of the records
311 * @param rd_count the number of records in data
312 * @param rd the record data
313 * @param signature the signature for the record data
316 put_gns_record(void *cls,
317 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
318 struct GNUNET_TIME_Absolute expiration,
320 unsigned int rd_count,
321 const struct GNUNET_NAMESTORE_RecordData *rd,
322 const struct GNUNET_CRYPTO_RsaSignature *signature)
325 struct GNSNameRecordBlock *nrb;
326 struct GNUNET_CRYPTO_ShortHashCode name_hash;
327 struct GNUNET_CRYPTO_ShortHashCode zhash;
328 struct GNUNET_HashCode xor_hash;
329 struct GNUNET_HashCode name_hash_double;
330 struct GNUNET_HashCode zone_hash_double;
331 uint32_t rd_payload_length;
332 char* nrb_data = NULL;
338 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
339 "Zone iteration finished. Rescheduling put in %llus\n",
340 (unsigned long long) dht_max_update_interval.rel_value / 1000LL);
341 namestore_iter = NULL;
342 zone_update_taskid = GNUNET_SCHEDULER_add_delayed (dht_max_update_interval,
343 &update_zone_dht_start,
345 GNUNET_STATISTICS_update (statistics,
346 "Number of zone iterations", 1, GNUNET_NO);
350 namelen = strlen(name) + 1;
352 if (signature == NULL)
354 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
355 "No signature for %s record data provided! Skipping...\n",
357 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
363 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
364 "Putting records for %s into the DHT\n", name);
366 rd_payload_length = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
368 nrb = GNUNET_malloc(rd_payload_length + namelen
369 + sizeof(struct GNSNameRecordBlock));
371 nrb->signature = *signature;
373 nrb->public_key = *key;
375 nrb->rd_count = htonl(rd_count);
377 memcpy(&nrb[1], name, namelen);
379 nrb_data = (char*)&nrb[1];
382 rd_payload_length += sizeof(struct GNSNameRecordBlock) + namelen;
384 if (-1 == GNUNET_NAMESTORE_records_serialize (rd_count,
389 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
390 "Record serialization failed! Skipping...\n");
392 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
399 * calculate DHT key: H(name) xor H(pubkey)
401 GNUNET_CRYPTO_short_hash(key,
402 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
404 GNUNET_CRYPTO_short_hash(name, strlen(name), &name_hash);
405 GNUNET_CRYPTO_short_hash_double (&name_hash, &name_hash_double);
406 GNUNET_CRYPTO_short_hash_double (&zhash, &zone_hash_double);
407 GNUNET_CRYPTO_hash_xor(&zone_hash_double, &name_hash_double, &xor_hash);
409 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
410 "zone identity: %s\n", GNUNET_h2s (&zone_hash_double));
412 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
413 "putting records for %s under key: %s with size %d\n",
414 name, GNUNET_h2s (&xor_hash), rd_payload_length);
416 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
417 "DHT req to %d\n", DHT_OPERATION_TIMEOUT.rel_value);
419 GNUNET_STATISTICS_update (statistics,
420 "Record data set put into DHT", 1, GNUNET_NO);
422 /* FIXME: keep return value to possibly cancel? */
423 GNUNET_DHT_put (dht_handle, &xor_hash,
424 DHT_GNS_REPLICATION_LEVEL,
426 GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
430 DHT_OPERATION_TIMEOUT,
432 NULL); //cls for cont
434 num_public_records++;
437 * Reschedule periodic put
439 zone_update_taskid = GNUNET_SCHEDULER_add_delayed (record_put_interval,
440 &update_zone_dht_next,
448 * Periodically iterate over our zone and store everything in dht
451 * @param tc task context
454 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
456 unsigned long long interval = 0;
458 zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
460 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Scheduling DHT zone update!\n");
461 if (0 == num_public_records)
464 * If no records are known (startup) or none present
465 * we can safely set the interval to 1s
467 record_put_interval = GNUNET_TIME_relative_multiply(
468 GNUNET_TIME_UNIT_SECONDS,
470 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
471 "No records in db. Adjusted record put interval to 1s\n");
472 GNUNET_STATISTICS_set (statistics,
473 "Current PUT interval (sec)", 1,
478 interval = max_record_put_interval/num_public_records;
481 record_put_interval = GNUNET_TIME_relative_multiply(
482 GNUNET_TIME_UNIT_SECONDS,
484 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
485 "Adjusted DHT update interval to %ds!\n",
487 GNUNET_STATISTICS_set (statistics,
488 "Current PUT interval (sec)", interval,
492 /* start counting again */
493 num_public_records = 0;
494 namestore_iter = GNUNET_NAMESTORE_zone_iteration_start (namestore_handle,
496 GNUNET_NAMESTORE_RF_AUTHORITY,
497 GNUNET_NAMESTORE_RF_PRIVATE,
502 /* END DHT ZONE PROPAGATION */
505 * Send shorten response back to client
507 * @param cls the closure containing a client shorten handle
508 * @param name the shortened name result or NULL if cannot be shortened
511 send_shorten_response(void* cls, const char* name)
513 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
514 "SHORTEN_RESULT", name);
515 struct GNUNET_GNS_ClientShortenResultMessage *rmsg;
516 struct ClientShortenHandle *csh = (struct ClientShortenHandle *)cls;
523 GNUNET_STATISTICS_update (statistics,
524 "Name shorten results", 1, GNUNET_NO);
526 rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientShortenResultMessage)
529 rmsg->id = csh->unique_id;
530 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_SHORTEN_RESULT);
532 htons(sizeof(struct GNUNET_GNS_ClientShortenResultMessage) +
535 strcpy((char*)&rmsg[1], name);
537 GNUNET_SERVER_notification_context_unicast (nc, csh->client,
538 (const struct GNUNET_MessageHeader *) rmsg,
540 GNUNET_SERVER_receive_done (csh->client, GNUNET_OK);
542 if (NULL != csh->namestore_task)
543 GNUNET_NAMESTORE_cancel (csh->namestore_task);
552 * Lookup the zone infos and shorten name
554 * @param cls the client shorten handle
555 * @param key key of the zone
556 * @param expiration expiration of record
557 * @param name name found or null if no result
558 * @param rd_count number of records found
559 * @param rd record data
564 process_shorten_in_private_zone_lookup (void *cls,
565 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
566 struct GNUNET_TIME_Absolute expiration,
568 unsigned int rd_count,
569 const struct GNUNET_NAMESTORE_RecordData *rd,
570 const struct GNUNET_CRYPTO_RsaSignature *signature)
572 struct ClientShortenHandle *csh = cls;
573 csh->namestore_task = NULL;
574 struct GNUNET_CRYPTO_ShortHashCode *szone = &csh->shorten_zone;
575 struct GNUNET_CRYPTO_ShortHashCode *pzone = &csh->private_zone;
577 if (0 == strcmp (csh->private_zone_id, ""))
582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
583 "No shorten zone in private zone!\n");
585 strcpy (csh->shorten_zone_id, "");
592 GNUNET_assert (rd_count == 1);
594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
595 "Shorten zone %s found in private zone %s\n",
596 name, csh->private_zone_id);
598 sprintf (csh->shorten_zone_id, "%s.%s", name, csh->private_zone_id);
601 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
603 gns_resolver_shorten_name (&csh->root_zone,
607 csh->private_zone_id,
608 csh->shorten_zone_id,
609 &send_shorten_response, csh);
615 * Lookup the zone infos and shorten name
617 * @param cls the shorten handle
618 * @param key key of the zone
619 * @param expiration expiration of record
620 * @param name name found or null if no result
621 * @param rd_count number of records found
622 * @param rd record data
627 process_shorten_in_root_zone_lookup (void *cls,
628 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
629 struct GNUNET_TIME_Absolute expiration,
631 unsigned int rd_count,
632 const struct GNUNET_NAMESTORE_RecordData *rd,
633 const struct GNUNET_CRYPTO_RsaSignature *signature)
635 struct ClientShortenHandle *csh = cls;
636 csh->namestore_task = NULL;
637 struct GNUNET_CRYPTO_ShortHashCode *szone = &csh->shorten_zone;
638 struct GNUNET_CRYPTO_ShortHashCode *pzone = &csh->private_zone;
640 if (0 == strcmp (csh->private_zone_id, ""))
645 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
646 "No shorten zone in zone and no private zone!\n");
648 strcpy (csh->shorten_zone_id, "");
650 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
653 gns_resolver_shorten_name (&csh->root_zone,
657 csh->private_zone_id,
658 csh->shorten_zone_id,
659 &send_shorten_response, csh);
663 GNUNET_assert (rd_count == 1);
665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
666 "Private zone %s found in root zone\n", name);
668 strcpy (csh->private_zone_id, name);
670 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
673 &process_shorten_in_private_zone_lookup,
679 * Lookup the zone infos and shorten name
681 * @param cls the shorten handle
682 * @param key key of the zone
683 * @param expiration expiration of record
684 * @param name name found or null if no result
685 * @param rd_count number of records found
686 * @param rd record data
691 process_private_in_root_zone_lookup (void *cls,
692 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
693 struct GNUNET_TIME_Absolute expiration,
695 unsigned int rd_count,
696 const struct GNUNET_NAMESTORE_RecordData *rd,
697 const struct GNUNET_CRYPTO_RsaSignature *signature)
699 struct ClientShortenHandle *csh = cls;
700 csh->namestore_task = NULL;
704 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
705 "No private zone in root zone\n");
707 strcpy (csh->private_zone_id, "");
709 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
712 &process_shorten_in_root_zone_lookup,
717 GNUNET_assert (rd_count == 1);
719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
720 "Private zone %s found in root zone\n", name);
722 strcpy (csh->private_zone_id, name);
724 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
727 &process_shorten_in_private_zone_lookup,
732 * Lookup the zone infos and shorten name
734 * @param csh the shorten handle
738 start_shorten_name (struct ClientShortenHandle *csh)
740 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
741 "Looking for private zone name in root zone\n");
743 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
746 &process_private_in_root_zone_lookup,
752 * Handle a shorten message from the api
754 * @param cls the closure
755 * @param client the client
756 * @param message the message
758 static void handle_shorten (void *cls,
759 struct GNUNET_SERVER_Client * client,
760 const struct GNUNET_MessageHeader * message)
762 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "SHORTEN");
765 struct ClientShortenHandle *csh;
766 char name[MAX_DNS_NAME_LENGTH];
767 char* nameptr = name;
769 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientShortenMessage))
772 GNUNET_SERVER_receive_done (client, GNUNET_OK);
777 struct GNUNET_GNS_ClientShortenMessage *sh_msg =
778 (struct GNUNET_GNS_ClientShortenMessage *) message;
780 msg_size = ntohs(message->size);
782 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
785 GNUNET_SERVER_receive_done (client, GNUNET_OK);
789 csh = GNUNET_malloc(sizeof(struct ClientShortenHandle));
790 csh->client = client;
791 csh->unique_id = sh_msg->id;
793 GNUNET_CONTAINER_DLL_insert (csh_head, csh_tail, csh);
795 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
797 if (strlen (name) < strlen(GNUNET_GNS_TLD)) {
798 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
799 "SHORTEN: %s is too short", name);
800 send_shorten_response(csh, name);
804 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
805 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
806 "SHORTEN: %s is too long", name);
807 send_shorten_response(csh, name);
811 if (!is_gnunet_tld(name) && !is_zkey_tld(name))
813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
814 "%s is not our domain. Returning\n", name);
815 send_shorten_response(csh, name);
819 csh->shorten_zone = sh_msg->shorten_zone;
820 csh->private_zone = sh_msg->private_zone;
822 strcpy (csh->name, name);
824 GNUNET_SERVER_notification_context_add (nc, client);
826 if (1 == ntohl(sh_msg->use_default_zone))
827 csh->root_zone = zone_hash; //Default zone
829 csh->root_zone = sh_msg->zone;
831 start_shorten_name (csh);
833 GNUNET_STATISTICS_update (statistics,
834 "Name shorten attempts", 1, GNUNET_NO);
840 * Send get authority response back to client
842 * @param cls the closure containing a client get auth handle
843 * @param name the shortened name result or NULL if cannot be shortened
846 send_get_auth_response(void *cls, const char* name)
848 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
849 "GET_AUTH_RESULT", name);
850 struct GNUNET_GNS_ClientGetAuthResultMessage *rmsg;
851 struct ClientGetAuthHandle *cah = (struct ClientGetAuthHandle *)cls;
855 GNUNET_STATISTICS_update (statistics,
856 "Authorities resolved", 1, GNUNET_NO);
864 rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage)
867 rmsg->id = cah->unique_id;
868 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_GET_AUTH_RESULT);
870 htons(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage) +
873 strcpy((char*)&rmsg[1], name);
875 GNUNET_SERVER_notification_context_unicast (nc, cah->client,
876 (const struct GNUNET_MessageHeader *) rmsg,
878 GNUNET_SERVER_receive_done (cah->client, GNUNET_OK);
881 GNUNET_free_non_null(cah->name);
890 * Handle a get authority message from the api
892 * @param cls the closure
893 * @param client the client
894 * @param message the message
896 static void handle_get_authority(void *cls,
897 struct GNUNET_SERVER_Client * client,
898 const struct GNUNET_MessageHeader * message)
900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "GET_AUTH");
903 struct ClientGetAuthHandle *cah;
904 char name[MAX_DNS_NAME_LENGTH];
905 char* nameptr = name;
908 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientGetAuthMessage))
911 GNUNET_SERVER_receive_done (client, GNUNET_OK);
915 GNUNET_SERVER_notification_context_add (nc, client);
917 struct GNUNET_GNS_ClientGetAuthMessage *sh_msg =
918 (struct GNUNET_GNS_ClientGetAuthMessage *) message;
920 msg_size = ntohs(message->size);
922 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
925 GNUNET_SERVER_receive_done (client, GNUNET_OK);
929 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
932 cah = GNUNET_malloc(sizeof(struct ClientGetAuthHandle));
933 cah->client = client;
934 cah->unique_id = sh_msg->id;
936 if (strlen(name) < strlen(GNUNET_GNS_TLD))
938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
939 "GET_AUTH: %s is too short. Returning\n", name);
941 send_get_auth_response(cah, name);
945 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
946 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
947 "GET_AUTH: %s is too long", name);
949 send_get_auth_response(cah, name);
953 if (strcmp(name+strlen(name)-strlen(GNUNET_GNS_TLD),
954 GNUNET_GNS_TLD) != 0)
956 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
957 "GET_AUTH: %s is not our domain. Returning\n", name);
959 send_get_auth_response(cah, name);
963 if (strcmp(name, GNUNET_GNS_TLD) == 0)
965 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
966 "GET_AUTH: %s is us. Returning\n", name);
968 send_get_auth_response(cah, name);
972 cah->name = GNUNET_malloc(strlen(name)
973 - strlen(GNUNET_GNS_TLD) + 1);
975 strlen(name)-strlen(GNUNET_GNS_TLD) + 1);
976 memcpy(cah->name, name,
977 strlen(name)-strlen(GNUNET_GNS_TLD));
979 /* Start delegation resolution in our namestore */
980 gns_resolver_get_authority(zone_hash, zone_hash, name, &send_get_auth_response, cah);
982 GNUNET_STATISTICS_update (statistics,
983 "Authority lookup attempts", 1, GNUNET_NO);
989 * Reply to client with the result from our lookup.
991 * @param cls the closure (our client lookup handle)
992 * @param rd_count the number of records
993 * @param rd the record data
996 send_lookup_response(void* cls,
998 const struct GNUNET_NAMESTORE_RecordData *rd)
1000 struct ClientLookupHandle* clh = (struct ClientLookupHandle*)cls;
1001 struct GNUNET_GNS_ClientLookupResultMessage *rmsg;
1004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %d results\n",
1005 "LOOKUP_RESULT", rd_count);
1007 len = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
1008 rmsg = GNUNET_malloc(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
1010 rmsg->id = clh->unique_id;
1011 rmsg->rd_count = htonl(rd_count);
1012 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT);
1014 htons(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
1016 GNUNET_NAMESTORE_records_serialize (rd_count, rd, len, (char*)&rmsg[1]);
1018 GNUNET_SERVER_notification_context_unicast (nc, clh->client,
1019 (const struct GNUNET_MessageHeader *) rmsg,
1021 GNUNET_SERVER_receive_done (clh->client, GNUNET_OK);
1024 GNUNET_free(clh->name);
1026 if (NULL != clh->shorten_key)
1027 GNUNET_free(clh->shorten_key);
1031 GNUNET_STATISTICS_update (statistics,
1032 "Completed lookups", 1, GNUNET_NO);
1036 GNUNET_STATISTICS_update (statistics,
1037 "Records resolved", rd_count, GNUNET_NO);
1044 * Handle lookup requests from client
1046 * @param cls the closure
1047 * @param client the client
1048 * @param message the message
1051 handle_lookup(void *cls,
1052 struct GNUNET_SERVER_Client * client,
1053 const struct GNUNET_MessageHeader * message)
1055 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "LOOKUP");
1057 size_t msg_size = 0;
1059 char name[MAX_DNS_NAME_LENGTH];
1060 struct ClientLookupHandle *clh;
1061 char* nameptr = name;
1063 struct GNUNET_CRYPTO_RsaPrivateKey *key;
1064 struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *pkey;
1067 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientLookupMessage))
1069 GNUNET_break_op (0);
1070 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1074 GNUNET_SERVER_notification_context_add (nc, client);
1076 struct GNUNET_GNS_ClientLookupMessage *sh_msg =
1077 (struct GNUNET_GNS_ClientLookupMessage *) message;
1079 msg_size = ntohs(message->size);
1081 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
1083 GNUNET_break_op (0);
1084 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1088 if (1 == ntohl(sh_msg->have_key))
1090 pkey = (struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *)&sh_msg[1];
1091 tmp_pkey = (char*)&sh_msg[1];
1092 key = GNUNET_CRYPTO_rsa_decode_key (tmp_pkey, ntohs(pkey->len));
1093 GNUNET_STRINGS_utf8_tolower(&tmp_pkey[ntohs(pkey->len)], &nameptr);
1098 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
1101 namelen = strlen(name)+1;
1102 clh = GNUNET_malloc (sizeof (struct ClientLookupHandle));
1103 memset (clh, 0, sizeof (struct ClientLookupHandle));
1104 clh->client = client;
1105 clh->name = GNUNET_malloc(namelen);
1106 strcpy(clh->name, name);
1107 clh->unique_id = sh_msg->id;
1108 clh->type = ntohl(sh_msg->type);
1109 clh->shorten_key = key;
1111 only_cached = ntohl(sh_msg->only_cached);
1113 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
1114 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1115 "LOOKUP: %s is too long", name);
1117 send_lookup_response(clh, 0, NULL);
1121 if ((clh->type == GNUNET_GNS_RECORD_A) &&
1122 (GNUNET_OK != v4_enabled))
1124 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1125 "LOOKUP: Query for A record but AF_INET not supported!");
1127 send_lookup_response(clh, 0, NULL);
1131 if ((clh->type == GNUNET_GNS_RECORD_AAAA) &&
1132 (GNUNET_OK != v6_enabled))
1134 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1135 "LOOKUP: Query for AAAA record but AF_INET6 not supported!");
1137 send_lookup_response(clh, 0, NULL);
1141 if (1 == ntohl(sh_msg->use_default_zone))
1142 clh->zone = zone_hash; //Default zone
1144 clh->zone = sh_msg->zone;
1146 if (GNUNET_YES == auto_import_pkey)
1148 gns_resolver_lookup_record (clh->zone, clh->zone, clh->type, clh->name,
1150 default_lookup_timeout,
1152 &send_lookup_response, clh);
1156 gns_resolver_lookup_record (clh->zone, clh->zone, clh->type, name,
1158 default_lookup_timeout,
1160 &send_lookup_response, clh);
1163 GNUNET_STATISTICS_update (statistics,
1164 "Record lookup attempts", 1, GNUNET_NO);
1168 * Test if the given AF is supported by this system.
1171 * @return GNUNET_OK if the AF is supported
1178 s = socket (af, SOCK_STREAM, 0);
1181 if (EAFNOSUPPORT == errno)
1183 fprintf (stderr, "Failed to create test socket: %s\n", STRERROR (errno));
1184 return GNUNET_SYSERR;
1191 * Process GNS requests.
1193 * @param cls closure)
1194 * @param server the initialized server
1195 * @param c configuration to use
1198 run (void *cls, struct GNUNET_SERVER_Handle *server,
1199 const struct GNUNET_CONFIGURATION_Handle *c)
1202 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Initializing GNS\n");
1205 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
1206 unsigned long long max_parallel_bg_queries = 0;
1207 unsigned long long default_lookup_timeout_secs = 0;
1208 int ignore_pending = GNUNET_NO;
1210 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1211 {&handle_shorten, NULL, GNUNET_MESSAGE_TYPE_GNS_SHORTEN, 0},
1212 {&handle_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, 0},
1213 {&handle_get_authority, NULL, GNUNET_MESSAGE_TYPE_GNS_GET_AUTH, 0}
1218 v6_enabled = test_af (AF_INET6);
1219 v4_enabled = test_af (AF_INET);
1221 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (c, "gns",
1222 "ZONEKEY", &keyfile))
1224 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1225 "No private key for root zone specified!\n");
1226 GNUNET_SCHEDULER_shutdown ();
1230 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1231 "Using keyfile %s for root zone.\n", keyfile);
1233 zone_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
1234 GNUNET_CRYPTO_rsa_key_get_public (zone_key, &pkey);
1236 GNUNET_CRYPTO_short_hash(&pkey,
1237 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1239 GNUNET_free(keyfile);
1242 * handle to our local namestore
1244 namestore_handle = GNUNET_NAMESTORE_connect(c);
1246 if (NULL == namestore_handle)
1248 //FIXME do error handling;
1249 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1250 "Failed to connect to the namestore!\n");
1251 GNUNET_SCHEDULER_shutdown ();
1257 auto_import_pkey = GNUNET_NO;
1260 GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1261 "AUTO_IMPORT_PKEY"))
1263 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1264 "Automatic PKEY import is enabled.\n");
1265 auto_import_pkey = GNUNET_YES;
1269 dht_max_update_interval.rel_value = GNUNET_GNS_DHT_MAX_UPDATE_INTERVAL; // yuck
1272 GNUNET_CONFIGURATION_get_value_time (c, "gns",
1273 "ZONE_PUT_INTERVAL",
1274 &dht_max_update_interval))
1276 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1277 "DHT zone update interval: %llu\n",
1278 (unsigned long long) dht_max_update_interval.rel_value);
1281 max_record_put_interval = 1;
1284 GNUNET_CONFIGURATION_get_value_number (c, "gns",
1285 "RECORD_PUT_INTERVAL",
1286 &max_record_put_interval))
1288 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1289 "Record put interval: %llu\n",
1290 max_record_put_interval);
1294 GNUNET_CONFIGURATION_get_value_number (c, "gns",
1295 "MAX_PARALLEL_BACKGROUND_QUERIES",
1296 &max_parallel_bg_queries))
1298 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1299 "Number of allowed parallel background queries: %llu\n",
1300 max_parallel_bg_queries);
1304 GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1305 "AUTO_IMPORT_CONFIRMATION_REQ"))
1307 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1308 "Auto import requires user confirmation\n");
1309 ignore_pending = GNUNET_YES;
1313 GNUNET_CONFIGURATION_get_value_number(c, "gns",
1314 "DEFAULT_LOOKUP_TIMEOUT",
1315 &default_lookup_timeout_secs))
1317 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1318 "Default lookup timeout: %llus\n", default_lookup_timeout_secs);
1319 default_lookup_timeout = GNUNET_TIME_relative_multiply(
1320 GNUNET_TIME_UNIT_SECONDS,
1321 default_lookup_timeout_secs);
1327 dht_handle = GNUNET_DHT_connect(c,
1328 //max_parallel_bg_queries); //FIXME get ht_len from cfg
1331 if (NULL == dht_handle)
1333 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Could not connect to DHT!\n");
1336 if (gns_resolver_init(namestore_handle, dht_handle, zone_hash, c,
1337 max_parallel_bg_queries,
1341 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1342 "Unable to initialize resolver!\n");
1343 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
1348 GNUNET_CONFIGURATION_get_value_yesno (c, "gns", "HIJACK_DNS"))
1350 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1351 "DNS hijacking enabled... connecting to service.\n");
1353 if (gns_interceptor_init(zone_hash, zone_key, c) == GNUNET_SYSERR)
1355 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1356 "Failed to enable the dns interceptor!\n");
1361 * Schedule periodic put
1363 * We have roughly an hour for all records;
1365 record_put_interval = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS,
1367 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start, NULL);
1369 GNUNET_SERVER_add_handlers (server, handlers);
1372 //GNUNET_SERVER_disconnect_notify (server,
1373 // &client_disconnect_notification,
1376 statistics = GNUNET_STATISTICS_create ("gns", c);
1378 nc = GNUNET_SERVER_notification_context_create (server, 1);
1380 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
1386 * The main function for the GNS service.
1388 * @param argc number of arguments from the command line
1389 * @param argv command line arguments
1390 * @return 0 ok, 1 on error
1393 main (int argc, char *const *argv)
1399 GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
1404 /* end of gnunet-service-gns.c */