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 "block_gns.h"
37 #include "gnunet-service-gns_resolver.h"
38 #include "gnunet-service-gns_interceptor.h"
40 /* FIXME move to proper header in include */
41 #define GNUNET_MESSAGE_TYPE_GNS_LOOKUP 23
42 #define GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT 24
43 #define GNUNET_MESSAGE_TYPE_GNS_SHORTEN 25
44 #define GNUNET_MESSAGE_TYPE_GNS_SHORTEN_RESULT 26
45 #define GNUNET_MESSAGE_TYPE_GNS_GET_AUTH 27
46 #define GNUNET_MESSAGE_TYPE_GNS_GET_AUTH_RESULT 28
50 * Handle to a shorten operation from api
52 struct ClientShortenHandle
56 struct ClientShortenHandle *next;
59 struct ClientShortenHandle *prev;
61 /* the requesting client that */
62 struct GNUNET_SERVER_Client *client;
68 enum GNUNET_GNS_RecordType type;
71 char name[MAX_DNS_NAME_LENGTH];
73 /* name of private zone (relative to root) */
74 char private_zone_id[MAX_DNS_NAME_LENGTH];
76 /* name of shorten zone (relative to root) */
77 char shorten_zone_id[MAX_DNS_NAME_LENGTH];
80 struct GNUNET_CRYPTO_ShortHashCode root_zone;
83 struct GNUNET_CRYPTO_ShortHashCode private_zone;
86 struct GNUNET_CRYPTO_ShortHashCode shorten_zone;
88 /* Namestore lookup task */
89 struct GNUNET_NAMESTORE_QueueEntry *namestore_task;
95 * Handle to a get auhtority operation from api
97 struct ClientGetAuthHandle
99 /* the requesting client that */
100 struct GNUNET_SERVER_Client *client;
105 /* name to lookup authority */
112 * Handle to a lookup operation from api
114 struct ClientLookupHandle
117 /* the requesting client that */
118 struct GNUNET_SERVER_Client *client;
120 /* The zone we look up in */
121 struct GNUNET_CRYPTO_ShortHashCode zone;
123 /* Do we only want to lookup from local cache? */
130 enum GNUNET_GNS_RecordType type;
132 /* optional zone private key used for shorten */
133 struct GNUNET_CRYPTO_RsaPrivateKey *shorten_key;
135 /* the name to look up */
136 char* name; //Needed?
140 * Our handle to the DHT
142 static struct GNUNET_DHT_Handle *dht_handle;
145 * Our zone's private key
147 struct GNUNET_CRYPTO_RsaPrivateKey *zone_key;
150 * Our handle to the namestore service
151 * FIXME maybe need a second handle for iteration
153 struct GNUNET_NAMESTORE_Handle *namestore_handle;
156 * Handle to iterate over our authoritative zone in namestore
158 struct GNUNET_NAMESTORE_ZoneIterator *namestore_iter;
161 * The configuration the GNS service is running with
163 const struct GNUNET_CONFIGURATION_Handle *GNS_cfg;
166 * Our notification context.
168 static struct GNUNET_SERVER_NotificationContext *nc;
173 struct GNUNET_CRYPTO_ShortHashCode zone_hash;
176 * Useful for zone update for DHT put
178 static int num_public_records;
181 * update interval in seconds
183 static unsigned long long max_record_put_interval;
185 static struct GNUNET_TIME_Relative dht_max_update_interval;
187 /* dht update interval FIXME define? */
188 static struct GNUNET_TIME_Relative record_put_interval;
190 /* zone update task */
191 GNUNET_SCHEDULER_TaskIdentifier zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
193 /* automatic pkey import for name shortening */
194 static int auto_import_pkey;
197 static struct GNUNET_TIME_Relative default_lookup_timeout;
200 static int v6_enabled;
203 static int v4_enabled;
205 /* Shorten DLL for cancelling NS requests */
206 static struct ClientShortenHandle *csh_head;
208 /* Shorten DLL for cancelling NS requests */
209 static struct ClientShortenHandle *csh_tail;
212 * Send shorten response back to client
214 * @param cls the closure containing a client shorten handle
215 * @param name the shortened name result or NULL if cannot be shortened
218 send_shorten_response(void* cls, const char* name);
225 on_resolver_cleanup(void)
227 if (NULL != namestore_iter)
228 GNUNET_NAMESTORE_zone_iteration_stop (namestore_iter);
229 GNUNET_NAMESTORE_disconnect(namestore_handle);
230 GNUNET_DHT_disconnect(dht_handle);
234 * Task run during shutdown.
240 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
242 struct ClientShortenHandle *csh_tmp = csh_head;
244 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
247 while (csh_tmp != NULL)
249 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh_tmp);
250 send_shorten_response (csh_tmp, csh_tmp->name);
253 GNUNET_SERVER_notification_context_destroy (nc);
255 gns_interceptor_stop();
256 gns_resolver_cleanup(&on_resolver_cleanup);
257 /* Kill zone task for it may make the scheduler hang */
258 if (zone_update_taskid != GNUNET_SCHEDULER_NO_TASK)
259 GNUNET_SCHEDULER_cancel(zone_update_taskid);
264 * Method called periodicattluy that triggers
265 * iteration over root zone
268 * @param tc task context
271 update_zone_dht_next(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
273 zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
274 GNUNET_NAMESTORE_zone_iterator_next (namestore_iter);
278 * Continuation for DHT put
281 * @param success GNUNET_OK if the PUT was transmitted,
282 * GNUNET_NO on timeout,
283 * GNUNET_SYSERR on disconnect from service
284 * after the PUT message was transmitted
285 * (so we don't know if it was received or not)
288 record_dht_put(void *cls, int success)
290 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "put request transmitted\n");
295 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
298 * Function used to put all records successively into the DHT.
300 * @param cls the closure (NULL)
301 * @param key the public key of the authority (ours)
302 * @param expiration lifetime of the namestore entry
303 * @param name the name of the records
304 * @param rd_count the number of records in data
305 * @param rd the record data
306 * @param signature the signature for the record data
309 put_gns_record(void *cls,
310 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
311 struct GNUNET_TIME_Absolute expiration,
313 unsigned int rd_count,
314 const struct GNUNET_NAMESTORE_RecordData *rd,
315 const struct GNUNET_CRYPTO_RsaSignature *signature)
318 struct GNSNameRecordBlock *nrb;
319 struct GNUNET_CRYPTO_ShortHashCode name_hash;
320 struct GNUNET_CRYPTO_ShortHashCode zhash;
321 struct GNUNET_HashCode xor_hash;
322 struct GNUNET_HashCode name_hash_double;
323 struct GNUNET_HashCode zone_hash_double;
324 uint32_t rd_payload_length;
325 char* nrb_data = NULL;
331 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
332 "Zone iteration finished. Rescheduling put in %llus\n",
333 (unsigned long long) dht_max_update_interval.rel_value / 1000LL);
334 namestore_iter = NULL;
335 zone_update_taskid = GNUNET_SCHEDULER_add_delayed (dht_max_update_interval,
336 &update_zone_dht_start,
341 namelen = strlen(name) + 1;
343 if (signature == NULL)
345 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
346 "No signature for %s record data provided! Skipping...\n",
348 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
354 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
355 "Putting records for %s into the DHT\n", name);
357 rd_payload_length = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
359 nrb = GNUNET_malloc(rd_payload_length + namelen
360 + sizeof(struct GNSNameRecordBlock));
362 nrb->signature = *signature;
364 nrb->public_key = *key;
366 nrb->rd_count = htonl(rd_count);
368 memcpy(&nrb[1], name, namelen);
370 nrb_data = (char*)&nrb[1];
373 rd_payload_length += sizeof(struct GNSNameRecordBlock) + namelen;
375 if (-1 == GNUNET_NAMESTORE_records_serialize (rd_count,
380 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
381 "Record serialization failed! Skipping...\n");
383 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_next,
390 * calculate DHT key: H(name) xor H(pubkey)
392 GNUNET_CRYPTO_short_hash(key,
393 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
395 GNUNET_CRYPTO_short_hash(name, strlen(name), &name_hash);
396 GNUNET_CRYPTO_short_hash_double (&name_hash, &name_hash_double);
397 GNUNET_CRYPTO_short_hash_double (&zhash, &zone_hash_double);
398 GNUNET_CRYPTO_hash_xor(&zone_hash_double, &name_hash_double, &xor_hash);
400 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
401 "zone identity: %s\n", GNUNET_h2s (&zone_hash_double));
403 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
404 "putting records for %s under key: %s with size %d\n",
405 name, GNUNET_h2s (&xor_hash), rd_payload_length);
407 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
408 "DHT req to %d\n", DHT_OPERATION_TIMEOUT.rel_value);
409 /* FIXME: keep return value to possibly cancel? */
410 GNUNET_DHT_put (dht_handle, &xor_hash,
411 DHT_GNS_REPLICATION_LEVEL,
413 GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
417 DHT_OPERATION_TIMEOUT,
419 NULL); //cls for cont
421 num_public_records++;
424 * Reschedule periodic put
426 zone_update_taskid = GNUNET_SCHEDULER_add_delayed (record_put_interval,
427 &update_zone_dht_next,
435 * Periodically iterate over our zone and store everything in dht
438 * @param tc task context
441 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
443 unsigned long long interval = 0;
445 zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
447 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Scheduling DHT zone update!\n");
448 if (0 == num_public_records)
451 * If no records are known (startup) or none present
452 * we can safely set the interval to 1s
454 record_put_interval = GNUNET_TIME_relative_multiply(
455 GNUNET_TIME_UNIT_SECONDS,
457 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
458 "No records in db. Adjusted record put interval to 1s\n");
462 interval = max_record_put_interval/num_public_records;
465 record_put_interval = GNUNET_TIME_relative_multiply(
466 GNUNET_TIME_UNIT_SECONDS,
468 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
469 "Adjusted DHT update interval to %ds!\n",
473 /* start counting again */
474 num_public_records = 0;
475 namestore_iter = GNUNET_NAMESTORE_zone_iteration_start (namestore_handle,
477 GNUNET_NAMESTORE_RF_AUTHORITY,
478 GNUNET_NAMESTORE_RF_PRIVATE,
483 /* END DHT ZONE PROPAGATION */
486 * Send shorten response back to client
488 * @param cls the closure containing a client shorten handle
489 * @param name the shortened name result or NULL if cannot be shortened
492 send_shorten_response(void* cls, const char* name)
494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
495 "SHORTEN_RESULT", name);
496 struct GNUNET_GNS_ClientShortenResultMessage *rmsg;
497 struct ClientShortenHandle *csh = (struct ClientShortenHandle *)cls;
504 rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientShortenResultMessage)
507 rmsg->id = csh->unique_id;
508 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_SHORTEN_RESULT);
510 htons(sizeof(struct GNUNET_GNS_ClientShortenResultMessage) +
513 strcpy((char*)&rmsg[1], name);
515 GNUNET_SERVER_notification_context_unicast (nc, csh->client,
516 (const struct GNUNET_MessageHeader *) rmsg,
518 GNUNET_SERVER_receive_done (csh->client, GNUNET_OK);
520 if (NULL != csh->namestore_task)
521 GNUNET_NAMESTORE_cancel (csh->namestore_task);
530 * Lookup the zone infos and shorten name
532 * @param cls the client shorten handle
533 * @param key key of the zone
534 * @param expiration expiration of record
535 * @param name name found or null if no result
536 * @param rd_count number of records found
537 * @param rd record data
542 process_shorten_in_private_zone_lookup (void *cls,
543 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
544 struct GNUNET_TIME_Absolute expiration,
546 unsigned int rd_count,
547 const struct GNUNET_NAMESTORE_RecordData *rd,
548 const struct GNUNET_CRYPTO_RsaSignature *signature)
550 struct ClientShortenHandle *csh = cls;
551 csh->namestore_task = NULL;
552 struct GNUNET_CRYPTO_ShortHashCode *szone = &csh->shorten_zone;
553 struct GNUNET_CRYPTO_ShortHashCode *pzone = &csh->private_zone;
555 if (0 == strcmp (csh->private_zone_id, ""))
560 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
561 "No shorten zone in private zone!\n");
563 strcpy (csh->shorten_zone_id, "");
570 GNUNET_assert (rd_count == 1);
572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
573 "Shorten zone %s found in private zone %s\n",
574 name, csh->private_zone_id);
576 sprintf (csh->shorten_zone_id, "%s.%s", name, csh->private_zone_id);
579 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
581 gns_resolver_shorten_name (&csh->root_zone,
585 csh->private_zone_id,
586 csh->shorten_zone_id,
587 &send_shorten_response, csh);
593 * Lookup the zone infos and shorten name
595 * @param cls the 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_root_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 zone and no private zone!\n");
626 strcpy (csh->shorten_zone_id, "");
628 GNUNET_CONTAINER_DLL_remove (csh_head, csh_tail, csh);
631 gns_resolver_shorten_name (&csh->root_zone,
635 csh->private_zone_id,
636 csh->shorten_zone_id,
637 &send_shorten_response, csh);
641 GNUNET_assert (rd_count == 1);
643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
644 "Private zone %s found in root zone\n", name);
646 strcpy (csh->private_zone_id, name);
648 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
651 &process_shorten_in_private_zone_lookup,
657 * Lookup the zone infos and shorten name
659 * @param cls the shorten handle
660 * @param key key of the zone
661 * @param expiration expiration of record
662 * @param name name found or null if no result
663 * @param rd_count number of records found
664 * @param rd record data
669 process_private_in_root_zone_lookup (void *cls,
670 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
671 struct GNUNET_TIME_Absolute expiration,
673 unsigned int rd_count,
674 const struct GNUNET_NAMESTORE_RecordData *rd,
675 const struct GNUNET_CRYPTO_RsaSignature *signature)
677 struct ClientShortenHandle *csh = cls;
678 csh->namestore_task = NULL;
682 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
683 "No private zone in root zone\n");
685 strcpy (csh->private_zone_id, "");
687 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
690 &process_shorten_in_root_zone_lookup,
695 GNUNET_assert (rd_count == 1);
697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
698 "Private zone %s found in root zone\n", name);
700 strcpy (csh->private_zone_id, name);
702 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
705 &process_shorten_in_private_zone_lookup,
710 * Lookup the zone infos and shorten name
712 * @param csh the shorten handle
716 start_shorten_name (struct ClientShortenHandle *csh)
718 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
719 "Looking for private zone name in root zone\n");
721 csh->namestore_task = GNUNET_NAMESTORE_zone_to_name (namestore_handle,
724 &process_private_in_root_zone_lookup,
730 * Handle a shorten message from the api
732 * @param cls the closure
733 * @param client the client
734 * @param message the message
736 static void handle_shorten (void *cls,
737 struct GNUNET_SERVER_Client * client,
738 const struct GNUNET_MessageHeader * message)
740 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "SHORTEN");
743 struct ClientShortenHandle *csh;
744 char name[MAX_DNS_NAME_LENGTH];
745 char* nameptr = name;
747 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientShortenMessage))
750 GNUNET_SERVER_receive_done (client, GNUNET_OK);
755 struct GNUNET_GNS_ClientShortenMessage *sh_msg =
756 (struct GNUNET_GNS_ClientShortenMessage *) message;
758 msg_size = ntohs(message->size);
760 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
763 GNUNET_SERVER_receive_done (client, GNUNET_OK);
767 csh = GNUNET_malloc(sizeof(struct ClientShortenHandle));
768 csh->client = client;
769 csh->unique_id = sh_msg->id;
771 GNUNET_CONTAINER_DLL_insert (csh_head, csh_tail, csh);
773 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
775 if (strlen (name) < strlen(GNUNET_GNS_TLD)) {
776 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
777 "SHORTEN: %s is too short", name);
778 send_shorten_response(csh, name);
782 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
783 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
784 "SHORTEN: %s is too long", name);
785 send_shorten_response(csh, name);
789 if (!is_gnunet_tld(name) && !is_zkey_tld(name))
791 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
792 "%s is not our domain. Returning\n", name);
793 send_shorten_response(csh, name);
797 csh->shorten_zone = sh_msg->shorten_zone;
798 csh->private_zone = sh_msg->private_zone;
800 strcpy (csh->name, name);
802 GNUNET_SERVER_notification_context_add (nc, client);
804 if (1 == ntohl(sh_msg->use_default_zone))
805 csh->root_zone = zone_hash; //Default zone
807 csh->root_zone = sh_msg->zone;
809 start_shorten_name (csh);
815 * Send get authority response back to client
817 * @param cls the closure containing a client get auth handle
818 * @param name the shortened name result or NULL if cannot be shortened
821 send_get_auth_response(void *cls, const char* name)
823 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %s\n",
824 "GET_AUTH_RESULT", name);
825 struct GNUNET_GNS_ClientGetAuthResultMessage *rmsg;
826 struct ClientGetAuthHandle *cah = (struct ClientGetAuthHandle *)cls;
833 rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage)
836 rmsg->id = cah->unique_id;
837 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_GET_AUTH_RESULT);
839 htons(sizeof(struct GNUNET_GNS_ClientGetAuthResultMessage) +
842 strcpy((char*)&rmsg[1], name);
844 GNUNET_SERVER_notification_context_unicast (nc, cah->client,
845 (const struct GNUNET_MessageHeader *) rmsg,
847 GNUNET_SERVER_receive_done (cah->client, GNUNET_OK);
849 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Cleaning up handles...\n");
852 GNUNET_free_non_null(cah->name);
855 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done.\n");
861 * Handle a get authority message from the api
863 * @param cls the closure
864 * @param client the client
865 * @param message the message
867 static void handle_get_authority(void *cls,
868 struct GNUNET_SERVER_Client * client,
869 const struct GNUNET_MessageHeader * message)
871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "GET_AUTH");
874 struct ClientGetAuthHandle *cah;
875 char name[MAX_DNS_NAME_LENGTH];
876 char* nameptr = name;
879 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientGetAuthMessage))
882 GNUNET_SERVER_receive_done (client, GNUNET_OK);
886 GNUNET_SERVER_notification_context_add (nc, client);
888 struct GNUNET_GNS_ClientGetAuthMessage *sh_msg =
889 (struct GNUNET_GNS_ClientGetAuthMessage *) message;
891 msg_size = ntohs(message->size);
893 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
896 GNUNET_SERVER_receive_done (client, GNUNET_OK);
900 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
903 cah = GNUNET_malloc(sizeof(struct ClientGetAuthHandle));
904 cah->client = client;
905 cah->unique_id = sh_msg->id;
907 if (strlen(name) < strlen(GNUNET_GNS_TLD))
909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
910 "GET_AUTH: %s is too short. Returning\n", name);
912 send_get_auth_response(cah, name);
916 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
917 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
918 "GET_AUTH: %s is too long", name);
920 send_get_auth_response(cah, name);
924 if (strcmp(name+strlen(name)-strlen(GNUNET_GNS_TLD),
925 GNUNET_GNS_TLD) != 0)
927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
928 "GET_AUTH: %s is not our domain. Returning\n", name);
930 send_get_auth_response(cah, name);
934 if (strcmp(name, GNUNET_GNS_TLD) == 0)
936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
937 "GET_AUTH: %s is us. Returning\n", name);
939 send_get_auth_response(cah, name);
943 cah->name = GNUNET_malloc(strlen(name)
944 - strlen(GNUNET_GNS_TLD) + 1);
946 strlen(name)-strlen(GNUNET_GNS_TLD) + 1);
947 memcpy(cah->name, name,
948 strlen(name)-strlen(GNUNET_GNS_TLD));
950 /* Start delegation resolution in our namestore */
951 gns_resolver_get_authority(zone_hash, zone_hash, name, &send_get_auth_response, cah);
957 * Reply to client with the result from our lookup.
959 * @param cls the closure (our client lookup handle)
960 * @param rd_count the number of records
961 * @param rd the record data
964 send_lookup_response(void* cls,
966 const struct GNUNET_NAMESTORE_RecordData *rd)
968 struct ClientLookupHandle* clh = (struct ClientLookupHandle*)cls;
969 struct GNUNET_GNS_ClientLookupResultMessage *rmsg;
972 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message with %d results\n",
973 "LOOKUP_RESULT", rd_count);
975 len = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
976 rmsg = GNUNET_malloc(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
978 rmsg->id = clh->unique_id;
979 rmsg->rd_count = htonl(rd_count);
980 rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT);
982 htons(len+sizeof(struct GNUNET_GNS_ClientLookupResultMessage));
984 GNUNET_NAMESTORE_records_serialize (rd_count, rd, len, (char*)&rmsg[1]);
986 GNUNET_SERVER_notification_context_unicast (nc, clh->client,
987 (const struct GNUNET_MessageHeader *) rmsg,
989 GNUNET_SERVER_receive_done (clh->client, GNUNET_OK);
992 GNUNET_free(clh->name);
994 if (NULL != clh->shorten_key)
995 GNUNET_free(clh->shorten_key);
1003 * Handle lookup requests from client
1005 * @param cls the closure
1006 * @param client the client
1007 * @param message the message
1010 handle_lookup(void *cls,
1011 struct GNUNET_SERVER_Client * client,
1012 const struct GNUNET_MessageHeader * message)
1014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "LOOKUP");
1016 size_t msg_size = 0;
1018 char name[MAX_DNS_NAME_LENGTH];
1019 struct ClientLookupHandle *clh;
1020 char* nameptr = name;
1022 struct GNUNET_CRYPTO_RsaPrivateKey *key;
1023 struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *pkey;
1026 if (ntohs (message->size) < sizeof (struct GNUNET_GNS_ClientLookupMessage))
1028 GNUNET_break_op (0);
1029 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1033 GNUNET_SERVER_notification_context_add (nc, client);
1035 struct GNUNET_GNS_ClientLookupMessage *sh_msg =
1036 (struct GNUNET_GNS_ClientLookupMessage *) message;
1038 msg_size = ntohs(message->size);
1040 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
1042 GNUNET_break_op (0);
1043 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1047 if (1 == ntohl(sh_msg->have_key))
1049 pkey = (struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *)&sh_msg[1];
1050 tmp_pkey = (char*)&sh_msg[1];
1051 key = GNUNET_CRYPTO_rsa_decode_key (tmp_pkey, ntohs(pkey->len));
1052 GNUNET_STRINGS_utf8_tolower(&tmp_pkey[ntohs(pkey->len)], &nameptr);
1057 GNUNET_STRINGS_utf8_tolower((char*)&sh_msg[1], &nameptr);
1060 namelen = strlen(name)+1;
1061 clh = GNUNET_malloc (sizeof (struct ClientLookupHandle));
1062 memset (clh, 0, sizeof (struct ClientLookupHandle));
1063 clh->client = client;
1064 clh->name = GNUNET_malloc(namelen);
1065 strcpy(clh->name, name);
1066 clh->unique_id = sh_msg->id;
1067 clh->type = ntohl(sh_msg->type);
1068 clh->shorten_key = key;
1070 only_cached = ntohl(sh_msg->only_cached);
1072 if (strlen (name) > MAX_DNS_NAME_LENGTH) {
1073 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1074 "LOOKUP: %s is too long", name);
1076 send_lookup_response(clh, 0, NULL);
1080 if ((clh->type == GNUNET_GNS_RECORD_A) &&
1081 (GNUNET_OK != v4_enabled))
1083 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1084 "LOOKUP: Query for A record but AF_INET not supported!");
1086 send_lookup_response(clh, 0, NULL);
1090 if ((clh->type == GNUNET_GNS_RECORD_AAAA) &&
1091 (GNUNET_OK != v6_enabled))
1093 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1094 "LOOKUP: Query for AAAA record but AF_INET6 not supported!");
1096 send_lookup_response(clh, 0, NULL);
1100 if (1 == ntohl(sh_msg->use_default_zone))
1101 clh->zone = zone_hash; //Default zone
1103 clh->zone = sh_msg->zone;
1105 if (GNUNET_YES == auto_import_pkey)
1107 gns_resolver_lookup_record (clh->zone, clh->zone, clh->type, clh->name,
1109 default_lookup_timeout,
1111 &send_lookup_response, clh);
1115 gns_resolver_lookup_record (clh->zone, clh->zone, clh->type, name,
1117 default_lookup_timeout,
1119 &send_lookup_response, clh);
1124 * Test if the given AF is supported by this system.
1127 * @return GNUNET_OK if the AF is supported
1134 s = socket (af, SOCK_STREAM, 0);
1137 if (EAFNOSUPPORT == errno)
1139 fprintf (stderr, "Failed to create test socket: %s\n", STRERROR (errno));
1140 return GNUNET_SYSERR;
1147 * Process GNS requests.
1149 * @param cls closure)
1150 * @param server the initialized server
1151 * @param c configuration to use
1154 run (void *cls, struct GNUNET_SERVER_Handle *server,
1155 const struct GNUNET_CONFIGURATION_Handle *c)
1158 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Initializing GNS\n");
1161 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
1162 unsigned long long max_parallel_bg_queries = 0;
1163 unsigned long long default_lookup_timeout_secs = 0;
1164 int ignore_pending = GNUNET_NO;
1166 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1167 {&handle_shorten, NULL, GNUNET_MESSAGE_TYPE_GNS_SHORTEN, 0},
1168 {&handle_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, 0},
1169 {&handle_get_authority, NULL, GNUNET_MESSAGE_TYPE_GNS_GET_AUTH, 0}
1174 v6_enabled = test_af (AF_INET6);
1175 v4_enabled = test_af (AF_INET);
1177 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (c, "gns",
1178 "ZONEKEY", &keyfile))
1180 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1181 "No private key for root zone specified!\n");
1182 GNUNET_SCHEDULER_shutdown ();
1186 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1187 "Using keyfile %s for root zone.\n", keyfile);
1189 zone_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
1190 GNUNET_CRYPTO_rsa_key_get_public (zone_key, &pkey);
1192 GNUNET_CRYPTO_short_hash(&pkey,
1193 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1195 GNUNET_free(keyfile);
1198 * handle to our local namestore
1200 namestore_handle = GNUNET_NAMESTORE_connect(c);
1202 if (NULL == namestore_handle)
1204 //FIXME do error handling;
1205 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1206 "Failed to connect to the namestore!\n");
1207 GNUNET_SCHEDULER_shutdown ();
1213 auto_import_pkey = GNUNET_NO;
1216 GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1217 "AUTO_IMPORT_PKEY"))
1219 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1220 "Automatic PKEY import is enabled.\n");
1221 auto_import_pkey = GNUNET_YES;
1225 dht_max_update_interval.rel_value = GNUNET_GNS_DHT_MAX_UPDATE_INTERVAL; // yuck
1228 GNUNET_CONFIGURATION_get_value_time (c, "gns",
1229 "ZONE_PUT_INTERVAL",
1230 &dht_max_update_interval))
1232 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1233 "DHT zone update interval: %llu\n",
1234 (unsigned long long) dht_max_update_interval.rel_value);
1237 max_record_put_interval = 1;
1240 GNUNET_CONFIGURATION_get_value_number (c, "gns",
1241 "RECORD_PUT_INTERVAL",
1242 &max_record_put_interval))
1244 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1245 "Record put interval: %llu\n",
1246 max_record_put_interval);
1250 GNUNET_CONFIGURATION_get_value_number (c, "gns",
1251 "MAX_PARALLEL_BACKGROUND_QUERIES",
1252 &max_parallel_bg_queries))
1254 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1255 "Number of allowed parallel background queries: %llu\n",
1256 max_parallel_bg_queries);
1260 GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1261 "AUTO_IMPORT_CONFIRMATION_REQ"))
1263 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1264 "Auto import requires user confirmation\n");
1265 ignore_pending = GNUNET_YES;
1269 GNUNET_CONFIGURATION_get_value_number(c, "gns",
1270 "DEFAULT_LOOKUP_TIMEOUT",
1271 &default_lookup_timeout_secs))
1273 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1274 "Default lookup timeout: %llus\n", default_lookup_timeout_secs);
1275 default_lookup_timeout = GNUNET_TIME_relative_multiply(
1276 GNUNET_TIME_UNIT_SECONDS,
1277 default_lookup_timeout_secs);
1283 dht_handle = GNUNET_DHT_connect(c,
1284 //max_parallel_bg_queries); //FIXME get ht_len from cfg
1287 if (NULL == dht_handle)
1289 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Could not connect to DHT!\n");
1292 if (gns_resolver_init(namestore_handle, dht_handle, zone_hash, c,
1293 max_parallel_bg_queries,
1297 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1298 "Unable to initialize resolver!\n");
1299 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
1304 GNUNET_CONFIGURATION_get_value_yesno (c, "gns", "HIJACK_DNS"))
1306 GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1307 "DNS hijacking enabled... connecting to service.\n");
1309 if (gns_interceptor_init(zone_hash, zone_key, c) == GNUNET_SYSERR)
1311 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1312 "Failed to enable the dns interceptor!\n");
1317 * Schedule periodic put
1319 * We have roughly an hour for all records;
1321 record_put_interval = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS,
1323 zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start, NULL);
1325 GNUNET_SERVER_add_handlers (server, handlers);
1328 //GNUNET_SERVER_disconnect_notify (server,
1329 // &client_disconnect_notification,
1332 nc = GNUNET_SERVER_notification_context_create (server, 1);
1334 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
1340 * The main function for the GNS service.
1342 * @param argc number of arguments from the command line
1343 * @param argv command line arguments
1344 * @return 0 ok, 1 on error
1347 main (int argc, char *const *argv)
1353 GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
1358 /* end of gnunet-service-gns.c */