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 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
348 "Zone iteration finished. Rescheduling zone iteration\n");
350 namestore_iter = NULL;
351 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start, NULL);
352 GNUNET_STATISTICS_update (statistics,
353 "Number of zone iterations", 1, GNUNET_NO);
355 last_num_public_records = num_public_records;
356 GNUNET_STATISTICS_set (statistics,
357 "Number of public records in DHT",
358 last_num_public_records,
363 namelen = strlen(name) + 1;
367 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
368 "No records given for name %s! Skipping...\n",
370 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
375 if (signature == NULL)
377 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
378 "No signature for %s record data provided! Skipping...\n",
380 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
386 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
387 "Putting records for %s into the DHT\n", name);
389 rd_payload_length = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
391 nrb = GNUNET_malloc(rd_payload_length + namelen
392 + sizeof(struct GNSNameRecordBlock));
394 nrb->signature = *signature;
396 nrb->public_key = *key;
398 nrb->rd_count = htonl(rd_count);
400 memcpy(&nrb[1], name, namelen);
402 nrb_data = (char*)&nrb[1];
405 rd_payload_length += sizeof(struct GNSNameRecordBlock) + namelen;
407 if (-1 == GNUNET_NAMESTORE_records_serialize (rd_count,
412 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
413 "Record serialization failed! Skipping...\n");
415 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
422 * calculate DHT key: H(name) xor H(pubkey)
424 GNUNET_CRYPTO_short_hash(key,
425 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
427 GNUNET_CRYPTO_short_hash(name, strlen(name), &name_hash);
428 GNUNET_CRYPTO_short_hash_double (&name_hash, &name_hash_double);
429 GNUNET_CRYPTO_short_hash_double (&zhash, &zone_hash_double);
430 GNUNET_CRYPTO_hash_xor(&zone_hash_double, &name_hash_double, &xor_hash);
432 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
433 "zone identity: %s\n", GNUNET_h2s (&zone_hash_double));
435 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
436 "putting %d records for %s under key: %s with size %d\n",
437 rd_count, name, GNUNET_h2s (&xor_hash), rd_payload_length);
439 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
440 "DHT req to %d\n", DHT_OPERATION_TIMEOUT.rel_value);
442 GNUNET_STATISTICS_update (statistics,
443 "Records put into DHT", rd_count, GNUNET_NO);
444 GNUNET_STATISTICS_update (statistics,
445 "Record bytes put into DHT", rd_payload_length, GNUNET_NO);
447 /* FIXME: keep return value to possibly cancel? */
448 GNUNET_DHT_put (dht_handle, &xor_hash,
449 DHT_GNS_REPLICATION_LEVEL,
451 GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
455 DHT_OPERATION_TIMEOUT,
457 NULL); //cls for cont
459 num_public_records++;
461 if (num_public_records > last_num_public_records)
463 interval_adjustment = ceil ((double)num_public_records / (double)last_num_public_records);
464 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
465 "Last record count was lower than current record count... increasing.\n");
466 next_put_interval = GNUNET_TIME_relative_divide (zone_iteration_interval,
467 interval_adjustment);
471 next_put_interval = zone_iteration_interval;
473 GNUNET_STATISTICS_set (statistics,
474 "Current zone iteration interval [msec]",
475 next_put_interval.rel_value,
479 * Reschedule periodic put
481 zone_update_taskid = GNUNET_SCHEDULER_add_delayed (next_put_interval,
482 &update_zone_dht_next,
490 * Periodically iterate over our zone and store everything in dht
493 * @param tc task context
496 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
498 zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
500 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Scheduling DHT zone update!\n");
502 if (0 == last_num_public_records)
505 * If no records are known (startup) or none present
506 * we can safely set the interval to 1s
508 zone_iteration_interval = INITIAL_ZONE_ITERATION_INTERVAL;
509 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
510 "No records in db. Adjusted zone iteration interval to %llums\n",
511 zone_iteration_interval.rel_value);
512 GNUNET_STATISTICS_set (statistics,
513 "Current zone iteration interval [msec]",
514 zone_iteration_interval.rel_value,
519 zone_iteration_interval = GNUNET_TIME_relative_divide (record_put_interval,
520 last_num_public_records);
521 zone_iteration_interval = GNUNET_TIME_relative_max (MINIMUM_ZONE_ITERATION_INTERVAL,
522 zone_iteration_interval);
524 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
525 "Adjusted zone iteration interval to %llus!\n",
526 zone_iteration_interval.rel_value);
527 GNUNET_STATISTICS_set (statistics,
528 "Current zone iteration interval [msec]",
529 zone_iteration_interval.rel_value,
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);
838 if (strlen (name) < strlen(GNUNET_GNS_TLD)) {
839 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
840 "SHORTEN: %s is too short", name);
841 send_shorten_response(csh, name);
845 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
846 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
847 "SHORTEN: %s is too long", name);
848 send_shorten_response(csh, name);
852 if (!is_gnunet_tld(name) && !is_zkey_tld(name))
854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
855 "%s is not our domain. Returning\n", name);
856 send_shorten_response(csh, name);
860 csh->shorten_zone = sh_msg->shorten_zone;
861 csh->private_zone = sh_msg->private_zone;
863 strcpy (csh->name, name);
865 GNUNET_SERVER_notification_context_add (nc, client);
867 if (1 == ntohl(sh_msg->use_default_zone))
868 csh->root_zone = zone_hash; //Default zone
870 csh->root_zone = sh_msg->zone;
872 start_shorten_name (csh);
874 GNUNET_STATISTICS_update (statistics,
875 "Name shorten attempts", 1, GNUNET_NO);
881 * Send get authority response back to client
883 * @param cls the closure containing a client get auth handle
884 * @param name the shortened name result or NULL if cannot be shortened
887 send_get_auth_response(void *cls, const char* name)
889 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
890 "GET_AUTH_RESULT", name);
891 struct GNUNET_GNS_ClientGetAuthResultMessage *rmsg;
892 struct ClientGetAuthHandle *cah = (struct ClientGetAuthHandle *)cls;
896 GNUNET_STATISTICS_update (statistics,
897 "Authorities resolved", 1, GNUNET_NO);
905 rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage)
908 rmsg->id = cah->unique_id;
909 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_GET_AUTH_RESULT);
911 htons(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage) +
914 strcpy((char*)&rmsg[1], name);
916 GNUNET_SERVER_notification_context_unicast (nc, cah->client,
917 (const struct GNUNET_MessageHeader *) rmsg,
919 GNUNET_SERVER_receive_done (cah->client, GNUNET_OK);
922 GNUNET_free_non_null(cah->name);
931 * Handle a get authority message from the api
933 * @param cls the closure
934 * @param client the client
935 * @param message the message
937 static void handle_get_authority(void *cls,
938 struct GNUNET_SERVER_Client * client,
939 const struct GNUNET_MessageHeader * message)
941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "GET_AUTH");
944 struct ClientGetAuthHandle *cah;
945 char name[MAX_DNS_NAME_LENGTH];
946 char* nameptr = name;
949 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientGetAuthMessage))
952 GNUNET_SERVER_receive_done (client, GNUNET_OK);
956 GNUNET_SERVER_notification_context_add (nc, client);
958 struct GNUNET_GNS_ClientGetAuthMessage *sh_msg =
959 (struct GNUNET_GNS_ClientGetAuthMessage *) message;
961 msg_size = ntohs(message->size);
963 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
966 GNUNET_SERVER_receive_done (client, GNUNET_OK);
970 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
973 cah = GNUNET_malloc(sizeof(struct ClientGetAuthHandle));
974 cah->client = client;
975 cah->unique_id = sh_msg->id;
977 if (strlen(name) < strlen(GNUNET_GNS_TLD))
979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
980 "GET_AUTH: %s is too short. Returning\n", name);
982 send_get_auth_response(cah, name);
986 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
987 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
988 "GET_AUTH: %s is too long", name);
990 send_get_auth_response(cah, name);
994 if (strcmp(name+strlen(name)-strlen(GNUNET_GNS_TLD),
995 GNUNET_GNS_TLD) != 0)
997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
998 "GET_AUTH: %s is not our domain. Returning\n", name);
1000 send_get_auth_response(cah, name);
1004 if (strcmp(name, GNUNET_GNS_TLD) == 0)
1006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1007 "GET_AUTH: %s is us. Returning\n", name);
1009 send_get_auth_response(cah, name);
1013 cah->name = GNUNET_malloc(strlen(name)
1014 - strlen(GNUNET_GNS_TLD) + 1);
1015 memset(cah->name, 0,
1016 strlen(name)-strlen(GNUNET_GNS_TLD) + 1);
1017 memcpy(cah->name, name,
1018 strlen(name)-strlen(GNUNET_GNS_TLD));
1020 /* Start delegation resolution in our namestore */
1021 gns_resolver_get_authority(zone_hash, zone_hash, name, &send_get_auth_response, cah);
1023 GNUNET_STATISTICS_update (statistics,
1024 "Authority lookup attempts", 1, GNUNET_NO);
1030 * Reply to client with the result from our lookup.
1032 * @param cls the closure (our client lookup handle)
1033 * @param rd_count the number of records
1034 * @param rd the record data
1037 send_lookup_response(void* cls,
1039 const struct GNUNET_NAMESTORE_RecordData *rd)
1041 struct ClientLookupHandle* clh = (struct ClientLookupHandle*)cls;
1042 struct GNUNET_GNS_ClientLookupResultMessage *rmsg;
1045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %d results\n",
1046 "LOOKUP_RESULT", rd_count);
1048 len = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
1049 rmsg = GNUNET_malloc(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
1051 rmsg->id = clh->unique_id;
1052 rmsg->rd_count = htonl(rd_count);
1053 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT);
1055 htons(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
1057 GNUNET_NAMESTORE_records_serialize (rd_count, rd, len, (char*)&rmsg[1]);
1059 GNUNET_SERVER_notification_context_unicast (nc, clh->client,
1060 (const struct GNUNET_MessageHeader *) rmsg,
1062 GNUNET_SERVER_receive_done (clh->client, GNUNET_OK);
1065 GNUNET_free(clh->name);
1067 if (NULL != clh->shorten_key)
1068 GNUNET_free(clh->shorten_key);
1072 GNUNET_STATISTICS_update (statistics,
1073 "Completed lookups", 1, GNUNET_NO);
1077 GNUNET_STATISTICS_update (statistics,
1078 "Records resolved", rd_count, GNUNET_NO);
1085 * Handle lookup requests from client
1087 * @param cls the closure
1088 * @param client the client
1089 * @param message the message
1092 handle_lookup(void *cls,
1093 struct GNUNET_SERVER_Client * client,
1094 const struct GNUNET_MessageHeader * message)
1096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "LOOKUP");
1098 size_t msg_size = 0;
1100 char name[MAX_DNS_NAME_LENGTH];
1101 struct ClientLookupHandle *clh;
1102 char* nameptr = name;
1104 struct GNUNET_CRYPTO_RsaPrivateKey *key;
1105 struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *pkey;
1108 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientLookupMessage))
1110 GNUNET_break_op (0);
1111 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1115 GNUNET_SERVER_notification_context_add (nc, client);
1117 struct GNUNET_GNS_ClientLookupMessage *sh_msg =
1118 (struct GNUNET_GNS_ClientLookupMessage *) message;
1120 msg_size = ntohs(message->size);
1122 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
1124 GNUNET_break_op (0);
1125 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1129 if (1 == ntohl(sh_msg->have_key))
1131 pkey = (struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *)&sh_msg[1];
1132 tmp_pkey = (char*)&sh_msg[1];
1133 key = GNUNET_CRYPTO_rsa_decode_key (tmp_pkey, ntohs(pkey->len));
1134 GNUNET_STRINGS_utf8_tolower(&tmp_pkey[ntohs(pkey->len)], &nameptr);
1139 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
1142 namelen = strlen(name)+1;
1143 clh = GNUNET_malloc (sizeof (struct ClientLookupHandle));
1144 memset (clh, 0, sizeof (struct ClientLookupHandle));
1145 clh->client = client;
1146 clh->name = GNUNET_malloc(namelen);
1147 strcpy(clh->name, name);
1148 clh->unique_id = sh_msg->id;
1149 clh->type = ntohl(sh_msg->type);
1150 clh->shorten_key = key;
1152 only_cached = ntohl(sh_msg->only_cached);
1154 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
1155 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1156 "LOOKUP: %s is too long", name);
1158 send_lookup_response(clh, 0, NULL);
1162 if ((clh->type == GNUNET_GNS_RECORD_A) &&
1163 (GNUNET_OK != v4_enabled))
1165 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1166 "LOOKUP: Query for A record but AF_INET not supported!");
1168 send_lookup_response(clh, 0, NULL);
1172 if ((clh->type == GNUNET_GNS_RECORD_AAAA) &&
1173 (GNUNET_OK != v6_enabled))
1175 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1176 "LOOKUP: Query for AAAA record but AF_INET6 not supported!");
1178 send_lookup_response(clh, 0, NULL);
1182 if (1 == ntohl(sh_msg->use_default_zone))
1183 clh->zone = zone_hash; //Default zone
1185 clh->zone = sh_msg->zone;
1187 if (GNUNET_YES == auto_import_pkey)
1189 gns_resolver_lookup_record (clh->zone, clh->zone, clh->type, clh->name,
1191 default_lookup_timeout,
1193 &send_lookup_response, clh);
1197 gns_resolver_lookup_record (clh->zone, clh->zone, clh->type, name,
1199 default_lookup_timeout,
1201 &send_lookup_response, clh);
1204 GNUNET_STATISTICS_update (statistics,
1205 "Record lookup attempts", 1, GNUNET_NO);
1209 * Test if the given AF is supported by this system.
1212 * @return GNUNET_OK if the AF is supported
1219 s = socket (af, SOCK_STREAM, 0);
1222 if (EAFNOSUPPORT == errno)
1224 fprintf (stderr, "Failed to create test socket: %s\n", STRERROR (errno));
1225 return GNUNET_SYSERR;
1236 * Process GNS requests.
1238 * @param cls closure)
1239 * @param server the initialized server
1240 * @param c configuration to use
1243 run (void *cls, struct GNUNET_SERVER_Handle *server,
1244 const struct GNUNET_CONFIGURATION_Handle *c)
1247 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Initializing GNS\n");
1250 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
1251 unsigned long long max_parallel_bg_queries = 0;
1252 unsigned long long default_lookup_timeout_secs = 0;
1253 int ignore_pending = GNUNET_NO;
1255 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1256 {&handle_shorten, NULL, GNUNET_MESSAGE_TYPE_GNS_SHORTEN, 0},
1257 {&handle_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, 0},
1258 {&handle_get_authority, NULL, GNUNET_MESSAGE_TYPE_GNS_GET_AUTH, 0}
1263 v6_enabled = test_af (AF_INET6);
1264 v4_enabled = test_af (AF_INET);
1266 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (c, "gns",
1267 "ZONEKEY", &keyfile))
1269 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1270 "No private key for root zone specified!\n");
1271 GNUNET_SCHEDULER_shutdown ();
1275 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1276 "Using keyfile %s for root zone.\n", keyfile);
1278 zone_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
1279 GNUNET_CRYPTO_rsa_key_get_public (zone_key, &pkey);
1281 GNUNET_CRYPTO_short_hash(&pkey,
1282 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1284 GNUNET_free(keyfile);
1287 * handle to our local namestore
1289 namestore_handle = GNUNET_NAMESTORE_connect(c);
1291 if (NULL == namestore_handle)
1293 //FIXME do error handling;
1294 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1295 "Failed to connect to the namestore!\n");
1296 GNUNET_SCHEDULER_shutdown ();
1302 auto_import_pkey = GNUNET_NO;
1305 GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1306 "AUTO_IMPORT_PKEY"))
1308 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1309 "Automatic PKEY import is enabled.\n");
1310 auto_import_pkey = GNUNET_YES;
1314 zone_iteration_interval = INITIAL_ZONE_ITERATION_INTERVAL; // yuck
1316 record_put_interval = DEFAULT_RECORD_PUT_INTERVAL;
1319 GNUNET_CONFIGURATION_get_value_time (c, "gns",
1320 "RECORD_PUT_INTERVAL",
1321 &record_put_interval))
1323 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1324 "Record put interval: %llu\n",
1325 record_put_interval);
1329 GNUNET_CONFIGURATION_get_value_number (c, "gns",
1330 "MAX_PARALLEL_BACKGROUND_QUERIES",
1331 &max_parallel_bg_queries))
1333 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1334 "Number of allowed parallel background queries: %llu\n",
1335 max_parallel_bg_queries);
1339 GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1340 "AUTO_IMPORT_CONFIRMATION_REQ"))
1342 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1343 "Auto import requires user confirmation\n");
1344 ignore_pending = GNUNET_YES;
1348 GNUNET_CONFIGURATION_get_value_number(c, "gns",
1349 "DEFAULT_LOOKUP_TIMEOUT",
1350 &default_lookup_timeout_secs))
1352 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1353 "Default lookup timeout: %llus\n", default_lookup_timeout_secs);
1354 default_lookup_timeout = GNUNET_TIME_relative_multiply(
1355 GNUNET_TIME_UNIT_SECONDS,
1356 default_lookup_timeout_secs);
1362 dht_handle = GNUNET_DHT_connect(c,
1363 //max_parallel_bg_queries); //FIXME get ht_len from cfg
1366 if (NULL == dht_handle)
1368 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Could not connect to DHT!\n");
1371 if (gns_resolver_init(namestore_handle, dht_handle, zone_hash, c,
1372 max_parallel_bg_queries,
1376 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1377 "Unable to initialize resolver!\n");
1378 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
1383 GNUNET_CONFIGURATION_get_value_yesno (c, "gns", "HIJACK_DNS"))
1385 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1386 "DNS hijacking enabled... connecting to service.\n");
1388 if (gns_interceptor_init(zone_hash, zone_key, c) == GNUNET_SYSERR)
1390 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1391 "Failed to enable the dns interceptor!\n");
1396 * Schedule periodic put
1398 * We have roughly an hour for all records;
1400 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start, NULL);
1402 GNUNET_SERVER_add_handlers (server, handlers);
1405 //GNUNET_SERVER_disconnect_notify (server,
1406 // &client_disconnect_notification,
1409 statistics = GNUNET_STATISTICS_create ("gns", c);
1411 nc = GNUNET_SERVER_notification_context_create (server, 1);
1413 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
1419 * The main function for the GNS service.
1421 * @param argc number of arguments from the command line
1422 * @param argv command line arguments
1423 * @return 0 ok, 1 on error
1426 main (int argc, char *const *argv)
1432 GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
1437 /* end of gnunet-service-gns.c */