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);
342 namestore_iter = NULL;
343 zone_update_taskid = GNUNET_SCHEDULER_add_delayed (dht_max_update_interval,
344 &update_zone_dht_start,
346 GNUNET_STATISTICS_update (statistics,
347 "Number of zone iterations", 1, GNUNET_NO);
351 namelen = strlen(name) + 1;
355 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
356 "No records given for name %s! Skipping...\n",
358 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
363 if (signature == NULL)
365 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
366 "No signature for %s record data provided! Skipping...\n",
368 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
374 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
375 "Putting records for %s into the DHT\n", name);
377 rd_payload_length = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
379 nrb = GNUNET_malloc(rd_payload_length + namelen
380 + sizeof(struct GNSNameRecordBlock));
382 nrb->signature = *signature;
384 nrb->public_key = *key;
386 nrb->rd_count = htonl(rd_count);
388 memcpy(&nrb[1], name, namelen);
390 nrb_data = (char*)&nrb[1];
393 rd_payload_length += sizeof(struct GNSNameRecordBlock) + namelen;
395 if (-1 == GNUNET_NAMESTORE_records_serialize (rd_count,
400 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
401 "Record serialization failed! Skipping...\n");
403 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
410 * calculate DHT key: H(name) xor H(pubkey)
412 GNUNET_CRYPTO_short_hash(key,
413 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
415 GNUNET_CRYPTO_short_hash(name, strlen(name), &name_hash);
416 GNUNET_CRYPTO_short_hash_double (&name_hash, &name_hash_double);
417 GNUNET_CRYPTO_short_hash_double (&zhash, &zone_hash_double);
418 GNUNET_CRYPTO_hash_xor(&zone_hash_double, &name_hash_double, &xor_hash);
420 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
421 "zone identity: %s\n", GNUNET_h2s (&zone_hash_double));
423 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
424 "putting %d records for %s under key: %s with size %d\n",
425 rd_count, name, GNUNET_h2s (&xor_hash), rd_payload_length);
427 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
428 "DHT req to %d\n", DHT_OPERATION_TIMEOUT.rel_value);
430 GNUNET_STATISTICS_update (statistics,
431 "Records put into DHT", rd_count, GNUNET_NO);
432 GNUNET_STATISTICS_update (statistics,
433 "Record bytes put into DHT", rd_payload_length, GNUNET_NO);
435 /* FIXME: keep return value to possibly cancel? */
436 GNUNET_DHT_put (dht_handle, &xor_hash,
437 DHT_GNS_REPLICATION_LEVEL,
439 GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
443 DHT_OPERATION_TIMEOUT,
445 NULL); //cls for cont
447 num_public_records++;
450 * Reschedule periodic put
452 zone_update_taskid = GNUNET_SCHEDULER_add_delayed (record_put_interval,
453 &update_zone_dht_next,
461 * Periodically iterate over our zone and store everything in dht
464 * @param tc task context
467 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
469 unsigned long long interval = 0;
471 zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
473 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Scheduling DHT zone update!\n");
474 if (0 == num_public_records)
477 * If no records are known (startup) or none present
478 * we can safely set the interval to 1s
480 record_put_interval = GNUNET_TIME_relative_multiply(
481 GNUNET_TIME_UNIT_SECONDS,
483 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
484 "No records in db. Adjusted record put interval to 1s\n");
485 GNUNET_STATISTICS_set (statistics,
486 "Current PUT interval (sec)", 1,
491 interval = max_record_put_interval/num_public_records;
494 record_put_interval = GNUNET_TIME_relative_multiply(
495 GNUNET_TIME_UNIT_SECONDS,
497 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
498 "Adjusted DHT update interval to %ds!\n",
500 GNUNET_STATISTICS_set (statistics,
501 "Current PUT interval (sec)", interval,
505 /* start counting again */
506 num_public_records = 0;
507 namestore_iter = GNUNET_NAMESTORE_zone_iteration_start (namestore_handle,
509 GNUNET_NAMESTORE_RF_AUTHORITY,
510 GNUNET_NAMESTORE_RF_PRIVATE,
515 /* END DHT ZONE PROPAGATION */
518 * Send shorten response back to client
520 * @param cls the closure containing a client shorten handle
521 * @param name the shortened name result or NULL if cannot be shortened
524 send_shorten_response(void* cls, const char* name)
526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
527 "SHORTEN_RESULT", name);
528 struct GNUNET_GNS_ClientShortenResultMessage *rmsg;
529 struct ClientShortenHandle *csh = (struct ClientShortenHandle *)cls;
536 GNUNET_STATISTICS_update (statistics,
537 "Name shorten results", 1, GNUNET_NO);
539 rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientShortenResultMessage)
542 rmsg->id = csh->unique_id;
543 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_SHORTEN_RESULT);
545 htons(sizeof(struct GNUNET_GNS_ClientShortenResultMessage) +
548 strcpy((char*)&rmsg[1], name);
550 GNUNET_SERVER_notification_context_unicast (nc, csh->client,
551 (const struct GNUNET_MessageHeader *) rmsg,
553 GNUNET_SERVER_receive_done (csh->client, GNUNET_OK);
555 if (NULL != csh->namestore_task)
556 GNUNET_NAMESTORE_cancel (csh->namestore_task);
565 * Lookup the zone infos and shorten name
567 * @param cls the client shorten handle
568 * @param key key of the zone
569 * @param expiration expiration of record
570 * @param name name found or null if no result
571 * @param rd_count number of records found
572 * @param rd record data
577 process_shorten_in_private_zone_lookup (void *cls,
578 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
579 struct GNUNET_TIME_Absolute expiration,
581 unsigned int rd_count,
582 const struct GNUNET_NAMESTORE_RecordData *rd,
583 const struct GNUNET_CRYPTO_RsaSignature *signature)
585 struct ClientShortenHandle *csh = cls;
586 csh->namestore_task = NULL;
587 struct GNUNET_CRYPTO_ShortHashCode *szone = &csh->shorten_zone;
588 struct GNUNET_CRYPTO_ShortHashCode *pzone = &csh->private_zone;
590 if (0 == strcmp (csh->private_zone_id, ""))
595 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
596 "No shorten zone in private zone!\n");
598 strcpy (csh->shorten_zone_id, "");
605 GNUNET_assert (rd_count == 1);
607 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
608 "Shorten zone %s found in private zone %s\n",
609 name, csh->private_zone_id);
611 sprintf (csh->shorten_zone_id, "%s.%s", name, csh->private_zone_id);
614 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
616 gns_resolver_shorten_name (&csh->root_zone,
620 csh->private_zone_id,
621 csh->shorten_zone_id,
622 &send_shorten_response, csh);
628 * Lookup the zone infos and shorten name
630 * @param cls the shorten handle
631 * @param key key of the zone
632 * @param expiration expiration of record
633 * @param name name found or null if no result
634 * @param rd_count number of records found
635 * @param rd record data
640 process_shorten_in_root_zone_lookup (void *cls,
641 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
642 struct GNUNET_TIME_Absolute expiration,
644 unsigned int rd_count,
645 const struct GNUNET_NAMESTORE_RecordData *rd,
646 const struct GNUNET_CRYPTO_RsaSignature *signature)
648 struct ClientShortenHandle *csh = cls;
649 csh->namestore_task = NULL;
650 struct GNUNET_CRYPTO_ShortHashCode *szone = &csh->shorten_zone;
651 struct GNUNET_CRYPTO_ShortHashCode *pzone = &csh->private_zone;
653 if (0 == strcmp (csh->private_zone_id, ""))
658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
659 "No shorten zone in zone and no private zone!\n");
661 strcpy (csh->shorten_zone_id, "");
663 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
666 gns_resolver_shorten_name (&csh->root_zone,
670 csh->private_zone_id,
671 csh->shorten_zone_id,
672 &send_shorten_response, csh);
676 GNUNET_assert (rd_count == 1);
678 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
679 "Private zone %s found in root zone\n", name);
681 strcpy (csh->private_zone_id, name);
683 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
686 &process_shorten_in_private_zone_lookup,
692 * Lookup the zone infos and shorten name
694 * @param cls the shorten handle
695 * @param key key of the zone
696 * @param expiration expiration of record
697 * @param name name found or null if no result
698 * @param rd_count number of records found
699 * @param rd record data
704 process_private_in_root_zone_lookup (void *cls,
705 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
706 struct GNUNET_TIME_Absolute expiration,
708 unsigned int rd_count,
709 const struct GNUNET_NAMESTORE_RecordData *rd,
710 const struct GNUNET_CRYPTO_RsaSignature *signature)
712 struct ClientShortenHandle *csh = cls;
713 csh->namestore_task = NULL;
717 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
718 "No private zone in root zone\n");
720 strcpy (csh->private_zone_id, "");
722 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
725 &process_shorten_in_root_zone_lookup,
730 GNUNET_assert (rd_count == 1);
732 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
733 "Private zone %s found in root zone\n", name);
735 strcpy (csh->private_zone_id, name);
737 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
740 &process_shorten_in_private_zone_lookup,
745 * Lookup the zone infos and shorten name
747 * @param csh the shorten handle
751 start_shorten_name (struct ClientShortenHandle *csh)
753 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
754 "Looking for private zone name in root zone\n");
756 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
759 &process_private_in_root_zone_lookup,
765 * Handle a shorten message from the api
767 * @param cls the closure
768 * @param client the client
769 * @param message the message
771 static void handle_shorten (void *cls,
772 struct GNUNET_SERVER_Client * client,
773 const struct GNUNET_MessageHeader * message)
775 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "SHORTEN");
778 struct ClientShortenHandle *csh;
779 char name[MAX_DNS_NAME_LENGTH];
780 char* nameptr = name;
782 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientShortenMessage))
785 GNUNET_SERVER_receive_done (client, GNUNET_OK);
790 struct GNUNET_GNS_ClientShortenMessage *sh_msg =
791 (struct GNUNET_GNS_ClientShortenMessage *) message;
793 msg_size = ntohs(message->size);
795 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
798 GNUNET_SERVER_receive_done (client, GNUNET_OK);
802 csh = GNUNET_malloc(sizeof(struct ClientShortenHandle));
803 csh->client = client;
804 csh->unique_id = sh_msg->id;
806 GNUNET_CONTAINER_DLL_insert (csh_head, csh_tail, csh);
808 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
810 if (strlen (name) < strlen(GNUNET_GNS_TLD)) {
811 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
812 "SHORTEN: %s is too short", name);
813 send_shorten_response(csh, name);
817 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
818 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
819 "SHORTEN: %s is too long", name);
820 send_shorten_response(csh, name);
824 if (!is_gnunet_tld(name) && !is_zkey_tld(name))
826 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
827 "%s is not our domain. Returning\n", name);
828 send_shorten_response(csh, name);
832 csh->shorten_zone = sh_msg->shorten_zone;
833 csh->private_zone = sh_msg->private_zone;
835 strcpy (csh->name, name);
837 GNUNET_SERVER_notification_context_add (nc, client);
839 if (1 == ntohl(sh_msg->use_default_zone))
840 csh->root_zone = zone_hash; //Default zone
842 csh->root_zone = sh_msg->zone;
844 start_shorten_name (csh);
846 GNUNET_STATISTICS_update (statistics,
847 "Name shorten attempts", 1, GNUNET_NO);
853 * Send get authority response back to client
855 * @param cls the closure containing a client get auth handle
856 * @param name the shortened name result or NULL if cannot be shortened
859 send_get_auth_response(void *cls, const char* name)
861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
862 "GET_AUTH_RESULT", name);
863 struct GNUNET_GNS_ClientGetAuthResultMessage *rmsg;
864 struct ClientGetAuthHandle *cah = (struct ClientGetAuthHandle *)cls;
868 GNUNET_STATISTICS_update (statistics,
869 "Authorities resolved", 1, GNUNET_NO);
877 rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage)
880 rmsg->id = cah->unique_id;
881 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_GET_AUTH_RESULT);
883 htons(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage) +
886 strcpy((char*)&rmsg[1], name);
888 GNUNET_SERVER_notification_context_unicast (nc, cah->client,
889 (const struct GNUNET_MessageHeader *) rmsg,
891 GNUNET_SERVER_receive_done (cah->client, GNUNET_OK);
894 GNUNET_free_non_null(cah->name);
903 * Handle a get authority message from the api
905 * @param cls the closure
906 * @param client the client
907 * @param message the message
909 static void handle_get_authority(void *cls,
910 struct GNUNET_SERVER_Client * client,
911 const struct GNUNET_MessageHeader * message)
913 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "GET_AUTH");
916 struct ClientGetAuthHandle *cah;
917 char name[MAX_DNS_NAME_LENGTH];
918 char* nameptr = name;
921 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientGetAuthMessage))
924 GNUNET_SERVER_receive_done (client, GNUNET_OK);
928 GNUNET_SERVER_notification_context_add (nc, client);
930 struct GNUNET_GNS_ClientGetAuthMessage *sh_msg =
931 (struct GNUNET_GNS_ClientGetAuthMessage *) message;
933 msg_size = ntohs(message->size);
935 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
938 GNUNET_SERVER_receive_done (client, GNUNET_OK);
942 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
945 cah = GNUNET_malloc(sizeof(struct ClientGetAuthHandle));
946 cah->client = client;
947 cah->unique_id = sh_msg->id;
949 if (strlen(name) < strlen(GNUNET_GNS_TLD))
951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
952 "GET_AUTH: %s is too short. Returning\n", name);
954 send_get_auth_response(cah, name);
958 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
959 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
960 "GET_AUTH: %s is too long", name);
962 send_get_auth_response(cah, name);
966 if (strcmp(name+strlen(name)-strlen(GNUNET_GNS_TLD),
967 GNUNET_GNS_TLD) != 0)
969 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
970 "GET_AUTH: %s is not our domain. Returning\n", name);
972 send_get_auth_response(cah, name);
976 if (strcmp(name, GNUNET_GNS_TLD) == 0)
978 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
979 "GET_AUTH: %s is us. Returning\n", name);
981 send_get_auth_response(cah, name);
985 cah->name = GNUNET_malloc(strlen(name)
986 - strlen(GNUNET_GNS_TLD) + 1);
988 strlen(name)-strlen(GNUNET_GNS_TLD) + 1);
989 memcpy(cah->name, name,
990 strlen(name)-strlen(GNUNET_GNS_TLD));
992 /* Start delegation resolution in our namestore */
993 gns_resolver_get_authority(zone_hash, zone_hash, name, &send_get_auth_response, cah);
995 GNUNET_STATISTICS_update (statistics,
996 "Authority lookup attempts", 1, GNUNET_NO);
1002 * Reply to client with the result from our lookup.
1004 * @param cls the closure (our client lookup handle)
1005 * @param rd_count the number of records
1006 * @param rd the record data
1009 send_lookup_response(void* cls,
1011 const struct GNUNET_NAMESTORE_RecordData *rd)
1013 struct ClientLookupHandle* clh = (struct ClientLookupHandle*)cls;
1014 struct GNUNET_GNS_ClientLookupResultMessage *rmsg;
1017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %d results\n",
1018 "LOOKUP_RESULT", rd_count);
1020 len = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
1021 rmsg = GNUNET_malloc(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
1023 rmsg->id = clh->unique_id;
1024 rmsg->rd_count = htonl(rd_count);
1025 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT);
1027 htons(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
1029 GNUNET_NAMESTORE_records_serialize (rd_count, rd, len, (char*)&rmsg[1]);
1031 GNUNET_SERVER_notification_context_unicast (nc, clh->client,
1032 (const struct GNUNET_MessageHeader *) rmsg,
1034 GNUNET_SERVER_receive_done (clh->client, GNUNET_OK);
1037 GNUNET_free(clh->name);
1039 if (NULL != clh->shorten_key)
1040 GNUNET_free(clh->shorten_key);
1044 GNUNET_STATISTICS_update (statistics,
1045 "Completed lookups", 1, GNUNET_NO);
1049 GNUNET_STATISTICS_update (statistics,
1050 "Records resolved", rd_count, GNUNET_NO);
1057 * Handle lookup requests from client
1059 * @param cls the closure
1060 * @param client the client
1061 * @param message the message
1064 handle_lookup(void *cls,
1065 struct GNUNET_SERVER_Client * client,
1066 const struct GNUNET_MessageHeader * message)
1068 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "LOOKUP");
1070 size_t msg_size = 0;
1072 char name[MAX_DNS_NAME_LENGTH];
1073 struct ClientLookupHandle *clh;
1074 char* nameptr = name;
1076 struct GNUNET_CRYPTO_RsaPrivateKey *key;
1077 struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *pkey;
1080 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientLookupMessage))
1082 GNUNET_break_op (0);
1083 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1087 GNUNET_SERVER_notification_context_add (nc, client);
1089 struct GNUNET_GNS_ClientLookupMessage *sh_msg =
1090 (struct GNUNET_GNS_ClientLookupMessage *) message;
1092 msg_size = ntohs(message->size);
1094 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
1096 GNUNET_break_op (0);
1097 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1101 if (1 == ntohl(sh_msg->have_key))
1103 pkey = (struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *)&sh_msg[1];
1104 tmp_pkey = (char*)&sh_msg[1];
1105 key = GNUNET_CRYPTO_rsa_decode_key (tmp_pkey, ntohs(pkey->len));
1106 GNUNET_STRINGS_utf8_tolower(&tmp_pkey[ntohs(pkey->len)], &nameptr);
1111 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
1114 namelen = strlen(name)+1;
1115 clh = GNUNET_malloc (sizeof (struct ClientLookupHandle));
1116 memset (clh, 0, sizeof (struct ClientLookupHandle));
1117 clh->client = client;
1118 clh->name = GNUNET_malloc(namelen);
1119 strcpy(clh->name, name);
1120 clh->unique_id = sh_msg->id;
1121 clh->type = ntohl(sh_msg->type);
1122 clh->shorten_key = key;
1124 only_cached = ntohl(sh_msg->only_cached);
1126 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
1127 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1128 "LOOKUP: %s is too long", name);
1130 send_lookup_response(clh, 0, NULL);
1134 if ((clh->type == GNUNET_GNS_RECORD_A) &&
1135 (GNUNET_OK != v4_enabled))
1137 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1138 "LOOKUP: Query for A record but AF_INET not supported!");
1140 send_lookup_response(clh, 0, NULL);
1144 if ((clh->type == GNUNET_GNS_RECORD_AAAA) &&
1145 (GNUNET_OK != v6_enabled))
1147 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1148 "LOOKUP: Query for AAAA record but AF_INET6 not supported!");
1150 send_lookup_response(clh, 0, NULL);
1154 if (1 == ntohl(sh_msg->use_default_zone))
1155 clh->zone = zone_hash; //Default zone
1157 clh->zone = sh_msg->zone;
1159 if (GNUNET_YES == auto_import_pkey)
1161 gns_resolver_lookup_record (clh->zone, clh->zone, clh->type, clh->name,
1163 default_lookup_timeout,
1165 &send_lookup_response, clh);
1169 gns_resolver_lookup_record (clh->zone, clh->zone, clh->type, name,
1171 default_lookup_timeout,
1173 &send_lookup_response, clh);
1176 GNUNET_STATISTICS_update (statistics,
1177 "Record lookup attempts", 1, GNUNET_NO);
1181 * Test if the given AF is supported by this system.
1184 * @return GNUNET_OK if the AF is supported
1191 s = socket (af, SOCK_STREAM, 0);
1194 if (EAFNOSUPPORT == errno)
1196 fprintf (stderr, "Failed to create test socket: %s\n", STRERROR (errno));
1197 return GNUNET_SYSERR;
1204 * Process GNS requests.
1206 * @param cls closure)
1207 * @param server the initialized server
1208 * @param c configuration to use
1211 run (void *cls, struct GNUNET_SERVER_Handle *server,
1212 const struct GNUNET_CONFIGURATION_Handle *c)
1215 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Initializing GNS\n");
1218 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
1219 unsigned long long max_parallel_bg_queries = 0;
1220 unsigned long long default_lookup_timeout_secs = 0;
1221 int ignore_pending = GNUNET_NO;
1223 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1224 {&handle_shorten, NULL, GNUNET_MESSAGE_TYPE_GNS_SHORTEN, 0},
1225 {&handle_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, 0},
1226 {&handle_get_authority, NULL, GNUNET_MESSAGE_TYPE_GNS_GET_AUTH, 0}
1231 v6_enabled = test_af (AF_INET6);
1232 v4_enabled = test_af (AF_INET);
1234 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (c, "gns",
1235 "ZONEKEY", &keyfile))
1237 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1238 "No private key for root zone specified!\n");
1239 GNUNET_SCHEDULER_shutdown ();
1243 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1244 "Using keyfile %s for root zone.\n", keyfile);
1246 zone_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
1247 GNUNET_CRYPTO_rsa_key_get_public (zone_key, &pkey);
1249 GNUNET_CRYPTO_short_hash(&pkey,
1250 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1252 GNUNET_free(keyfile);
1255 * handle to our local namestore
1257 namestore_handle = GNUNET_NAMESTORE_connect(c);
1259 if (NULL == namestore_handle)
1261 //FIXME do error handling;
1262 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1263 "Failed to connect to the namestore!\n");
1264 GNUNET_SCHEDULER_shutdown ();
1270 auto_import_pkey = GNUNET_NO;
1273 GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1274 "AUTO_IMPORT_PKEY"))
1276 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1277 "Automatic PKEY import is enabled.\n");
1278 auto_import_pkey = GNUNET_YES;
1282 dht_max_update_interval.rel_value = GNUNET_GNS_DHT_MAX_UPDATE_INTERVAL; // yuck
1285 GNUNET_CONFIGURATION_get_value_time (c, "gns",
1286 "ZONE_PUT_INTERVAL",
1287 &dht_max_update_interval))
1289 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1290 "DHT zone update interval: %llu\n",
1291 (unsigned long long) dht_max_update_interval.rel_value);
1295 GNUNET_STATISTICS_set (statistics,
1296 "Zone update interval (secs)",
1297 (unsigned long long) dht_max_update_interval.rel_value / 1000LL,
1300 max_record_put_interval = 1;
1303 GNUNET_CONFIGURATION_get_value_number (c, "gns",
1304 "RECORD_PUT_INTERVAL",
1305 &max_record_put_interval))
1307 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1308 "Record put interval: %llu\n",
1309 max_record_put_interval);
1313 GNUNET_CONFIGURATION_get_value_number (c, "gns",
1314 "MAX_PARALLEL_BACKGROUND_QUERIES",
1315 &max_parallel_bg_queries))
1317 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1318 "Number of allowed parallel background queries: %llu\n",
1319 max_parallel_bg_queries);
1323 GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1324 "AUTO_IMPORT_CONFIRMATION_REQ"))
1326 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1327 "Auto import requires user confirmation\n");
1328 ignore_pending = GNUNET_YES;
1332 GNUNET_CONFIGURATION_get_value_number(c, "gns",
1333 "DEFAULT_LOOKUP_TIMEOUT",
1334 &default_lookup_timeout_secs))
1336 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1337 "Default lookup timeout: %llus\n", default_lookup_timeout_secs);
1338 default_lookup_timeout = GNUNET_TIME_relative_multiply(
1339 GNUNET_TIME_UNIT_SECONDS,
1340 default_lookup_timeout_secs);
1346 dht_handle = GNUNET_DHT_connect(c,
1347 //max_parallel_bg_queries); //FIXME get ht_len from cfg
1350 if (NULL == dht_handle)
1352 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Could not connect to DHT!\n");
1355 if (gns_resolver_init(namestore_handle, dht_handle, zone_hash, c,
1356 max_parallel_bg_queries,
1360 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1361 "Unable to initialize resolver!\n");
1362 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
1367 GNUNET_CONFIGURATION_get_value_yesno (c, "gns", "HIJACK_DNS"))
1369 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1370 "DNS hijacking enabled... connecting to service.\n");
1372 if (gns_interceptor_init(zone_hash, zone_key, c) == GNUNET_SYSERR)
1374 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1375 "Failed to enable the dns interceptor!\n");
1380 * Schedule periodic put
1382 * We have roughly an hour for all records;
1384 record_put_interval = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS,
1386 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start, NULL);
1388 GNUNET_SERVER_add_handlers (server, handlers);
1391 //GNUNET_SERVER_disconnect_notify (server,
1392 // &client_disconnect_notification,
1395 statistics = GNUNET_STATISTICS_create ("gns", c);
1397 nc = GNUNET_SERVER_notification_context_create (server, 1);
1399 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
1405 * The main function for the GNS service.
1407 * @param argc number of arguments from the command line
1408 * @param argv command line arguments
1409 * @return 0 ok, 1 on error
1412 main (int argc, char *const *argv)
1418 GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
1423 /* end of gnunet-service-gns.c */