2 This file is part of GNUnet.
3 (C) 2012, 2013 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.
22 * @file namestore/gnunet-service-namestore.c
23 * @brief namestore for the GNUnet naming system
24 * @author Matthias Wachs
25 * @author Christian Grothoff
28 #include "gnunet_util_lib.h"
29 #include "gnunet_dnsparser_lib.h"
30 #include "gnunet_gns_service.h"
31 #include "gnunet_namecache_service.h"
32 #include "gnunet_namestore_service.h"
33 #include "gnunet_namestore_plugin.h"
34 #include "gnunet_signatures.h"
35 #include "namestore.h"
37 #define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util", syscall, filename)
43 struct NamestoreClient;
47 * A namestore iteration operation.
52 * Next element in the DLL
54 struct ZoneIteration *next;
57 * Previous element in the DLL
59 struct ZoneIteration *prev;
62 * Namestore client which intiated this zone iteration
64 struct NamestoreClient *client;
67 * The nick to add to the records
69 struct GNUNET_GNSRECORD_Data *nick;
72 * Key of the zone we are iterating over.
74 struct GNUNET_CRYPTO_EcdsaPrivateKey zone;
77 * The operation id fot the zone iteration in the response for the client
82 * Offset of the zone iteration used to address next result of the zone
83 * iteration in the store
85 * Initialy set to 0 in handle_iteration_start
86 * Incremented with by every call to handle_iteration_next
96 struct NamestoreClient
99 * Next element in the DLL
101 struct NamestoreClient *next;
104 * Previous element in the DLL
106 struct NamestoreClient *prev;
111 struct GNUNET_SERVER_Client *client;
115 * Zone iteration operations in progress initiated by this client
117 struct ZoneIteration *op_head;
121 * Zone iteration operations in progress initiated by this client
123 struct ZoneIteration *op_tail;
128 * A namestore monitor.
133 * Next element in the DLL
135 struct ZoneMonitor *next;
138 * Previous element in the DLL
140 struct ZoneMonitor *prev;
143 * Namestore client which intiated this zone monitor
145 struct NamestoreClient *nc;
148 * Private key of the zone.
150 struct GNUNET_CRYPTO_EcdsaPrivateKey zone;
153 * Task active during initial iteration.
155 GNUNET_SCHEDULER_TaskIdentifier task;
158 * Offset of the zone iteration used to address next result of the zone
159 * iteration in the store
162 * Incremented with by every call to #handle_iteration_next
170 * Pending operation on the namecache.
172 struct CacheOperation
178 struct CacheOperation *prev;
183 struct CacheOperation *next;
186 * Handle to namecache queue.
188 struct GNUNET_NAMECACHE_QueueEntry *qe;
191 * Client to notify about the result.
193 struct GNUNET_SERVER_Client *client;
196 * Client's request ID.
203 * Public key of all zeros.
205 static const struct GNUNET_CRYPTO_EcdsaPrivateKey zero;
208 * Configuration handle.
210 static const struct GNUNET_CONFIGURATION_Handle *GSN_cfg;
215 static struct GNUNET_NAMECACHE_Handle *namecache;
220 static struct GNUNET_NAMESTORE_PluginFunctions *GSN_database;
223 * Name of the database plugin
225 static char *db_lib_name;
228 * Our notification context.
230 static struct GNUNET_SERVER_NotificationContext *snc;
233 * Head of the Client DLL
235 static struct NamestoreClient *client_head;
238 * Tail of the Client DLL
240 static struct NamestoreClient *client_tail;
245 static struct CacheOperation *cop_head;
250 static struct CacheOperation *cop_tail;
253 * First active zone monitor.
255 static struct ZoneMonitor *monitor_head;
258 * Last active zone monitor.
260 static struct ZoneMonitor *monitor_tail;
263 * Notification context shared by all monitors.
265 static struct GNUNET_SERVER_NotificationContext *monitor_nc;
270 * Task run during shutdown.
276 cleanup_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
278 struct ZoneIteration *no;
279 struct NamestoreClient *nc;
280 struct CacheOperation *cop;
282 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
283 "Stopping namestore service\n");
286 GNUNET_SERVER_notification_context_destroy (snc);
289 while (NULL != (cop = cop_head))
291 GNUNET_NAMECACHE_cancel (cop->qe);
292 GNUNET_CONTAINER_DLL_remove (cop_head,
297 GNUNET_NAMECACHE_disconnect (namecache);
299 while (NULL != (nc = client_head))
301 while (NULL != (no = nc->op_head))
303 GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, no);
306 GNUNET_CONTAINER_DLL_remove (client_head, client_tail, nc);
307 GNUNET_SERVER_client_set_user_context (nc->client, (void *)NULL);
310 GNUNET_break (NULL == GNUNET_PLUGIN_unload (db_lib_name, GSN_database));
311 GNUNET_free (db_lib_name);
313 if (NULL != monitor_nc)
315 GNUNET_SERVER_notification_context_destroy (monitor_nc);
322 * Called whenever a client is disconnected.
323 * Frees our resources associated with that client.
326 * @param client identification of the client
329 client_disconnect_notification (void *cls,
330 struct GNUNET_SERVER_Client *client)
332 struct ZoneIteration *no;
333 struct NamestoreClient *nc;
334 struct ZoneMonitor *zm;
335 struct CacheOperation *cop;
339 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
340 "Client %p disconnected\n",
342 if (NULL == (nc = GNUNET_SERVER_client_get_user_context (client, struct NamestoreClient)))
344 while (NULL != (no = nc->op_head))
346 GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, no);
349 GNUNET_CONTAINER_DLL_remove (client_head, client_tail, nc);
351 for (zm = monitor_head; NULL != zm; zm = zm->next)
353 if (client == zm->nc->client)
355 GNUNET_CONTAINER_DLL_remove (monitor_head,
358 if (GNUNET_SCHEDULER_NO_TASK != zm->task)
360 GNUNET_SCHEDULER_cancel (zm->task);
361 zm->task = GNUNET_SCHEDULER_NO_TASK;
367 for (cop = cop_head; NULL != cop; cop = cop->next)
368 if (client == cop->client)
374 * Add a client to our list of active clients, if it is not yet
377 * @param client client to add
378 * @return internal namestore client structure for this client
380 static struct NamestoreClient *
381 client_lookup (struct GNUNET_SERVER_Client *client)
383 struct NamestoreClient *nc;
385 nc = GNUNET_SERVER_client_get_user_context (client, struct NamestoreClient);
388 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
389 "Client %p connected\n",
391 nc = GNUNET_new (struct NamestoreClient);
393 GNUNET_SERVER_notification_context_add (snc, client);
394 GNUNET_CONTAINER_DLL_insert (client_head, client_tail, nc);
395 GNUNET_SERVER_client_set_user_context (client, nc);
401 lookup_nick_it (void *cls,
402 const struct GNUNET_CRYPTO_EcdsaPrivateKey *private_key,
404 unsigned int rd_count,
405 const struct GNUNET_GNSRECORD_Data *rd)
407 struct GNUNET_GNSRECORD_Data **res = cls;
410 if (0 != strcmp (label, GNUNET_GNS_MASTERZONE_STR))
415 for (c = 0; c < rd_count; c++)
417 if (GNUNET_GNSRECORD_TYPE_NICK == rd[c].record_type)
419 (*res) = GNUNET_malloc (rd[c].data_size + sizeof (struct GNUNET_GNSRECORD_Data));
420 (*res)->data = &(*res)[1];
421 memcpy ((char *)(*res)->data, rd[c].data, rd[c].data_size);
422 (*res)->data_size = rd[c].data_size;
423 (*res)->expiration_time = rd[c].expiration_time;
424 (*res)->flags = rd[c].flags;
425 (*res)->record_type = GNUNET_GNSRECORD_TYPE_NICK;
433 static struct GNUNET_GNSRECORD_Data *
434 get_nick_record (const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone)
436 struct GNUNET_CRYPTO_EcdsaPublicKey pub;
437 struct GNUNET_GNSRECORD_Data *nick;
440 res = GSN_database->lookup_records (GSN_database->cls, zone,
441 GNUNET_GNS_MASTERZONE_STR,
442 &lookup_nick_it, &nick);
443 if ((NULL == nick) || (GNUNET_OK != res))
445 GNUNET_CRYPTO_ecdsa_key_get_public (zone, &pub);
446 GNUNET_log (GNUNET_ERROR_TYPE_INFO | GNUNET_ERROR_TYPE_BULK,
447 "No nick name set for zone `%s'\n",
448 GNUNET_GNSRECORD_z2s (&pub));
456 merge_with_nick_records ( const struct GNUNET_GNSRECORD_Data *nick_rd,
458 const struct GNUNET_GNSRECORD_Data *rd2,
459 unsigned int *rdc_res,
460 struct GNUNET_GNSRECORD_Data **rd_res)
462 uint64_t latest_expiration;
468 (*rdc_res) = 1 + rdc2;
478 req += sizeof (struct GNUNET_GNSRECORD_Data) + nick_rd[c].data_size;
479 for (c=0; c< rdc2; c++)
480 req += sizeof (struct GNUNET_GNSRECORD_Data) + rd2[c].data_size;
481 (*rd_res) = GNUNET_malloc (req);
482 data = (char *) &(*rd_res)[1 + rdc2];
484 latest_expiration = 0;
486 for (c=0; c< rdc2; c++)
488 if (0 != (rd2[c].flags & GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION))
490 if ((GNUNET_TIME_absolute_get().abs_value_us + rd2[c].expiration_time) >
492 latest_expiration = rd2[c].expiration_time;
494 else if (rd2[c].expiration_time > latest_expiration)
495 latest_expiration = rd2[c].expiration_time;
496 (*rd_res)[c] = rd2[c];
497 (*rd_res)[c].data = (void *) &data[data_offset];
499 memcpy ((void *) (*rd_res)[c].data, rd2[c].data, rd2[c].data_size);
500 data_offset += (*rd_res)[c].data_size;
502 record_offset = rdc2;
505 (*rd_res)[c+record_offset] = nick_rd[c];
506 (*rd_res)[c+record_offset].expiration_time = latest_expiration;
507 (*rd_res)[c+record_offset].data = (void *) &data[data_offset];
509 memcpy ((void *) (*rd_res)[c+record_offset].data,
511 nick_rd[c].data_size);
512 data_offset += (*rd_res)[c+record_offset].data_size;
514 GNUNET_assert (req == (sizeof (struct GNUNET_GNSRECORD_Data)) * (*rdc_res) + data_offset);
519 * Generate a 'struct LookupNameResponseMessage' and send it to the
520 * given client using the given notification context.
522 * @param nc notification context to use
523 * @param client client to unicast to
524 * @param request_id request ID to use
525 * @param zone_key zone key of the zone
527 * @param rd_count number of records in @a rd
528 * @param rd array of records
531 send_lookup_response (struct GNUNET_SERVER_NotificationContext *nc,
532 struct GNUNET_SERVER_Client *client,
534 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
536 unsigned int rd_count,
537 const struct GNUNET_GNSRECORD_Data *rd)
539 struct RecordResultMessage *zir_msg;
540 struct GNUNET_GNSRECORD_Data *nick;
541 struct GNUNET_GNSRECORD_Data *res;
542 unsigned int res_count;
549 nick = get_nick_record (zone_key);
550 if ((NULL != nick) && (0 != strcmp(name, GNUNET_GNS_MASTERZONE_STR)))
552 nick->flags = (nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
553 merge_with_nick_records (nick, rd_count, rd, &res_count, &res);
554 //fprintf (stderr, "Merging %u records for `%s' with NICK records\n",rd_count, name);
559 res_count = rd_count;
560 res = (struct GNUNET_GNSRECORD_Data *) rd;
561 //fprintf (stderr, "Not merging %u records for `%s' with NICK records\n",rd_count, name);
564 name_len = strlen (name) + 1;
565 rd_ser_len = GNUNET_GNSRECORD_records_get_size (res_count, res);
566 msg_size = sizeof (struct RecordResultMessage) + name_len + rd_ser_len;
567 (void) client_lookup (client);
568 zir_msg = GNUNET_malloc (msg_size);
569 zir_msg->gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_RESULT);
570 zir_msg->gns_header.header.size = htons (msg_size);
571 zir_msg->gns_header.r_id = htonl (request_id);
572 zir_msg->name_len = htons (name_len);
573 zir_msg->rd_count = htons (res_count);
574 zir_msg->rd_len = htons (rd_ser_len);
575 zir_msg->private_key = *zone_key;
576 name_tmp = (char *) &zir_msg[1];
577 memcpy (name_tmp, name, name_len);
578 rd_ser = &name_tmp[name_len];
579 GNUNET_GNSRECORD_records_serialize (res_count, res, rd_ser_len, rd_ser);
580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
581 "Sending `%s' message with %u records and size %u\n",
585 GNUNET_SERVER_notification_context_unicast (nc,
587 &zir_msg->gns_header.header,
591 GNUNET_free (zir_msg);
596 * Send response to the store request to the client.
598 * @param client client to talk to
599 * @param res status of the operation
600 * @param rid client's request ID
603 send_store_response (struct GNUNET_SERVER_Client *client,
607 struct RecordStoreResponseMessage rcr_msg;
609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
610 "Sending `%s' message\n",
611 "RECORD_STORE_RESPONSE");
612 rcr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE_RESPONSE);
613 rcr_msg.gns_header.header.size = htons (sizeof (struct RecordStoreResponseMessage));
614 rcr_msg.gns_header.r_id = htonl (rid);
615 rcr_msg.op_result = htonl (res);
616 GNUNET_SERVER_notification_context_unicast (snc, client,
617 &rcr_msg.gns_header.header,
623 * Cache operation complete, clean up.
625 * @param cls the `struct CacheOperation`
626 * @param success success
627 * @param emsg error messages
630 finish_cache_operation (void *cls,
634 struct CacheOperation *cop = cls;
637 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
638 _("Failed to replicate block in namecache: %s\n"),
641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
642 "CACHE operation completed\n");
643 GNUNET_CONTAINER_DLL_remove (cop_head,
646 if (NULL != cop->client)
647 send_store_response (cop->client,
655 * We just touched the plaintext information about a name in our zone;
656 * refresh the corresponding (encrypted) block in the namecache.
658 * @param client client responsible for the request
659 * @param rid request ID of the client
660 * @param zone_key private key of the zone
661 * @param name label for the records
662 * @param rd_count number of records
663 * @param rd records stored under the given @a name
666 refresh_block (struct GNUNET_SERVER_Client *client,
668 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
670 unsigned int rd_count,
671 const struct GNUNET_GNSRECORD_Data *rd)
673 struct GNUNET_GNSRECORD_Block *block;
674 struct CacheOperation *cop;
675 struct GNUNET_CRYPTO_EcdsaPublicKey pkey;
676 struct GNUNET_GNSRECORD_Data *nick;
677 struct GNUNET_GNSRECORD_Data *res;
678 unsigned int res_count;
680 nick = get_nick_record (zone_key);
681 res_count = rd_count;
682 res = (struct GNUNET_GNSRECORD_Data *) rd; /* fixme: a bit unclean... */
685 nick->flags = (nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
686 merge_with_nick_records (nick, rd_count,rd, &res_count, &res);
691 block = GNUNET_GNSRECORD_block_create (zone_key,
692 GNUNET_TIME_UNIT_ZERO_ABS,
696 block = GNUNET_GNSRECORD_block_create (zone_key,
697 GNUNET_GNSRECORD_record_get_expiration_time (res_count,
701 GNUNET_assert (NULL != block);
702 GNUNET_CRYPTO_ecdsa_key_get_public (zone_key,
704 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
705 "Caching block for label `%s' with %u records in zone `%s' in namecache\n",
708 GNUNET_GNSRECORD_z2s (&pkey));
709 cop = GNUNET_new (struct CacheOperation);
710 cop->client = client;
712 GNUNET_CONTAINER_DLL_insert (cop_head,
715 cop->qe = GNUNET_NAMECACHE_block_cache (namecache,
717 &finish_cache_operation,
723 struct RecordLookupContext
729 unsigned int res_rd_count;
735 struct GNUNET_GNSRECORD_Data *nick;
740 lookup_it (void *cls,
741 const struct GNUNET_CRYPTO_EcdsaPrivateKey *private_key,
743 unsigned int rd_count,
744 const struct GNUNET_GNSRECORD_Data *rd)
746 struct RecordLookupContext *rlc = cls;
747 struct GNUNET_GNSRECORD_Data *rd_res;
748 unsigned int rdc_res;
750 if (0 == strcmp (label, rlc->label))
752 rlc->found = GNUNET_YES;
755 if ((NULL != rlc->nick) && (0 != strcmp(label, GNUNET_GNS_MASTERZONE_STR)))
760 rlc->nick->flags = (rlc->nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
761 merge_with_nick_records (rlc->nick,
765 rlc->rd_ser_len = GNUNET_GNSRECORD_records_get_size (rdc_res, rd_res);
766 rlc->res_rd_count = rdc_res;
767 rlc->res_rd = GNUNET_malloc (rlc->rd_ser_len);
768 GNUNET_GNSRECORD_records_serialize (rdc_res, rd_res, rlc->rd_ser_len , rlc->res_rd);
770 GNUNET_free (rd_res);
771 GNUNET_free (rlc->nick);
776 rlc->rd_ser_len = GNUNET_GNSRECORD_records_get_size (rd_count, rd);
777 rlc->res_rd_count = rd_count;
778 rlc->res_rd = GNUNET_malloc (rlc->rd_ser_len);
779 GNUNET_GNSRECORD_records_serialize (rd_count, rd, rlc->rd_ser_len , rlc->res_rd);
785 rlc->res_rd_count = 0;
793 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP message
796 * @param client client sending the message
797 * @param message message of type 'struct RecordCreateMessage'
800 handle_record_lookup (void *cls,
801 struct GNUNET_SERVER_Client *client,
802 const struct GNUNET_MessageHeader *message)
804 const struct LabelLookupMessage *ll_msg;
805 struct LabelLookupResponseMessage *llr_msg;
806 struct RecordLookupContext rlc;
807 const char *name_tmp;
814 if (ntohs (message->size) < sizeof (struct LabelLookupMessage))
817 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
821 ll_msg = (const struct LabelLookupMessage *) message;
822 name_len = ntohl (ll_msg->label_len);
823 src_size = ntohs (message->size);
825 if (name_len != src_size - sizeof (struct LabelLookupMessage))
828 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
832 name_tmp = (const char *) &ll_msg[1];
833 if ('\0' != name_tmp[name_len -1])
836 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
840 GNUNET_SERVER_receive_done (client, GNUNET_OK);
841 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
842 "Received `%s' message for name `%s'\n",
843 "NAMESTORE_RECORD_LOOKUP", name_tmp);
845 if (NULL == (client_lookup (client)))
848 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
852 rlc.label = name_tmp;
853 rlc.found = GNUNET_NO;
854 rlc.res_rd_count = 0;
857 rlc.nick = get_nick_record (&ll_msg->zone);
859 res = GSN_database->lookup_records (GSN_database->cls,
860 &ll_msg->zone, name_tmp, &lookup_it, &rlc);
862 res_size = sizeof (struct LabelLookupResponseMessage) + name_len + rlc.rd_ser_len;
863 llr_msg = GNUNET_malloc (res_size);
864 llr_msg->gns_header.header.size = htons (res_size);
865 llr_msg->gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP_RESPONSE);
866 llr_msg->gns_header.r_id = ll_msg->gns_header.r_id;
867 llr_msg->private_key = ll_msg->zone;
868 llr_msg->name_len = htons (name_len);
869 llr_msg->rd_count = htons (rlc.res_rd_count);
870 llr_msg->rd_len = htons (rlc.rd_ser_len);
871 res_name = (char *) &llr_msg[1];
872 if ((GNUNET_YES == rlc.found) && (GNUNET_OK == res))
873 llr_msg->found = ntohs (GNUNET_YES);
875 llr_msg->found = ntohs (GNUNET_NO);
876 memcpy (&llr_msg[1], name_tmp, name_len);
877 memcpy (&res_name[name_len], rlc.res_rd, rlc.rd_ser_len);
879 GNUNET_SERVER_notification_context_unicast (snc, client, &llr_msg->gns_header.header,
882 GNUNET_free_non_null (rlc.res_rd);
883 GNUNET_free (llr_msg);
888 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE message
891 * @param client client sending the message
892 * @param message message of type 'struct RecordCreateMessage'
895 handle_record_store (void *cls,
896 struct GNUNET_SERVER_Client *client,
897 const struct GNUNET_MessageHeader *message)
899 const struct RecordStoreMessage *rp_msg;
905 const char *name_tmp;
908 unsigned int rd_count;
910 struct GNUNET_CRYPTO_EcdsaPublicKey pubkey;
911 struct ZoneMonitor *zm;
913 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
914 "Received `%s' message\n",
915 "NAMESTORE_RECORD_STORE");
916 if (ntohs (message->size) < sizeof (struct RecordStoreMessage))
919 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
922 rp_msg = (const struct RecordStoreMessage *) message;
923 rid = ntohl (rp_msg->gns_header.r_id);
924 name_len = ntohs (rp_msg->name_len);
925 msg_size = ntohs (message->size);
926 rd_count = ntohs (rp_msg->rd_count);
927 rd_ser_len = ntohs (rp_msg->rd_len);
928 GNUNET_break (0 == ntohs (rp_msg->reserved));
929 msg_size_exp = sizeof (struct RecordStoreMessage) + name_len + rd_ser_len;
930 if (msg_size != msg_size_exp)
933 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
936 if ((0 == name_len) || (name_len > MAX_NAME_LEN))
939 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
942 name_tmp = (const char *) &rp_msg[1];
943 rd_ser = &name_tmp[name_len];
944 if ('\0' != name_tmp[name_len -1])
947 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
950 (void) client_lookup (client);
952 struct GNUNET_GNSRECORD_Data rd[rd_count];
955 GNUNET_GNSRECORD_records_deserialize (rd_ser_len, rd_ser, rd_count, rd))
958 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
962 /* Extracting and converting private key */
963 GNUNET_CRYPTO_ecdsa_key_get_public (&rp_msg->private_key,
965 conv_name = GNUNET_GNSRECORD_string_to_lowercase (name_tmp);
966 if (NULL == conv_name)
968 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
969 "Error converting name `%s'\n", name_tmp);
970 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
973 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
974 "Creating %u records for name `%s' in zone `%s'\n",
975 (unsigned int) rd_count,
977 GNUNET_GNSRECORD_z2s (&pubkey));
979 if ( (0 == rd_count) &&
981 GSN_database->iterate_records (GSN_database->cls,
982 &rp_msg->private_key, 0, NULL, 0)) )
984 /* This name does not exist, so cannot be removed */
985 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
986 "Name `%s' does not exist, no deletion required\n",
992 struct GNUNET_GNSRECORD_Data rd_clean[rd_count];
994 unsigned int rd_clean_off;
996 /* remove "NICK" records, unless this is for the "+" label */
998 for (i=0;i<rd_count;i++)
1000 rd_clean[rd_clean_off] = rd[i];
1001 if ( (0 == strcmp (GNUNET_GNS_MASTERZONE_STR,
1003 (GNUNET_GNSRECORD_TYPE_NICK != rd[i].record_type) )
1006 res = GSN_database->store_records (GSN_database->cls,
1007 &rp_msg->private_key,
1009 rd_clean_off, rd_clean);
1010 if (GNUNET_OK == res)
1012 for (zm = monitor_head; NULL != zm; zm = zm->next)
1014 if ( (0 == memcmp (&rp_msg->private_key, &zm->zone,
1015 sizeof (struct GNUNET_CRYPTO_EcdsaPrivateKey))) ||
1016 (0 == memcmp (&zm->zone,
1018 sizeof (struct GNUNET_CRYPTO_EcdsaPrivateKey))) )
1020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1021 "Notifying monitor about changes under label `%s'\n",
1023 send_lookup_response (monitor_nc,
1026 &rp_msg->private_key,
1031 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1032 "Monitor is for another zone\n");
1034 if (NULL == monitor_head)
1035 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1036 "No monitors active\n");
1040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1041 "Error storing record: %d\n",
1045 if (GNUNET_OK == res)
1047 refresh_block (client, rid,
1048 &rp_msg->private_key,
1051 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1052 GNUNET_free (conv_name);
1055 GNUNET_free (conv_name);
1057 send_store_response (client, res, rid);
1058 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1063 * Context for record remove operations passed from #handle_zone_to_name to
1064 * #handle_zone_to_name_it as closure
1066 struct ZoneToNameCtx
1071 struct NamestoreClient *nc;
1074 * Request id (to be used in the response to the client).
1079 * Set to #GNUNET_OK on success, #GNUNET_SYSERR on error. Note that
1080 * not finding a name for the zone still counts as a 'success' here,
1081 * as this field is about the success of executing the IPC protocol.
1088 * Zone to name iterator
1090 * @param cls struct ZoneToNameCtx *
1091 * @param zone_key the zone key
1093 * @param rd_count number of records in @a rd
1094 * @param rd record data
1097 handle_zone_to_name_it (void *cls,
1098 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1100 unsigned int rd_count,
1101 const struct GNUNET_GNSRECORD_Data *rd)
1103 struct ZoneToNameCtx *ztn_ctx = cls;
1104 struct ZoneToNameResponseMessage *ztnr_msg;
1112 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1113 "Found result for zone-to-name lookup: `%s'\n",
1116 name_len = (NULL == name) ? 0 : strlen (name) + 1;
1117 rd_ser_len = GNUNET_GNSRECORD_records_get_size (rd_count, rd);
1118 msg_size = sizeof (struct ZoneToNameResponseMessage) + name_len + rd_ser_len;
1119 if (msg_size >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1122 ztn_ctx->success = GNUNET_SYSERR;
1125 ztnr_msg = GNUNET_malloc (msg_size);
1126 ztnr_msg->gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME_RESPONSE);
1127 ztnr_msg->gns_header.header.size = htons (msg_size);
1128 ztnr_msg->gns_header.r_id = htonl (ztn_ctx->rid);
1129 ztnr_msg->res = htons (res);
1130 ztnr_msg->rd_len = htons (rd_ser_len);
1131 ztnr_msg->rd_count = htons (rd_count);
1132 ztnr_msg->name_len = htons (name_len);
1133 ztnr_msg->zone = *zone_key;
1134 name_tmp = (char *) &ztnr_msg[1];
1136 memcpy (name_tmp, name, name_len);
1137 rd_tmp = &name_tmp[name_len];
1138 GNUNET_GNSRECORD_records_serialize (rd_count, rd, rd_ser_len, rd_tmp);
1139 ztn_ctx->success = GNUNET_OK;
1140 GNUNET_SERVER_notification_context_unicast (snc, ztn_ctx->nc->client,
1141 &ztnr_msg->gns_header.header,
1143 GNUNET_free (ztnr_msg);
1148 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME message
1151 * @param client client sending the message
1152 * @param message message of type 'struct ZoneToNameMessage'
1155 handle_zone_to_name (void *cls,
1156 struct GNUNET_SERVER_Client *client,
1157 const struct GNUNET_MessageHeader *message)
1159 struct NamestoreClient *nc;
1160 const struct ZoneToNameMessage *ztn_msg;
1161 struct ZoneToNameCtx ztn_ctx;
1162 struct ZoneToNameResponseMessage ztnr_msg;
1164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1165 "Received `%s' message\n",
1167 ztn_msg = (const struct ZoneToNameMessage *) message;
1168 nc = client_lookup (client);
1169 ztn_ctx.rid = ntohl (ztn_msg->gns_header.r_id);
1171 ztn_ctx.success = GNUNET_NO;
1172 if (GNUNET_SYSERR ==
1173 GSN_database->zone_to_name (GSN_database->cls,
1175 &ztn_msg->value_zone,
1176 &handle_zone_to_name_it, &ztn_ctx))
1178 /* internal error, hang up instead of signalling something
1179 that might be wrong */
1181 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1184 if (GNUNET_NO == ztn_ctx.success)
1186 /* no result found, send empty response */
1187 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1188 "Found no result for zone-to-name lookup.\n");
1189 memset (&ztnr_msg, 0, sizeof (ztnr_msg));
1190 ztnr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME_RESPONSE);
1191 ztnr_msg.gns_header.header.size = htons (sizeof (ztnr_msg));
1192 ztnr_msg.gns_header.r_id = ztn_msg->gns_header.r_id;
1193 ztnr_msg.res = htons (GNUNET_NO);
1194 GNUNET_SERVER_notification_context_unicast (snc,
1196 &ztnr_msg.gns_header.header,
1199 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1204 * Zone iteration processor result
1206 enum ZoneIterationResult
1215 * Continue to iterate with next iteration_next call
1217 IT_SUCCESS_MORE_AVAILABLE = 1,
1220 * Iteration complete
1222 IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE = 2
1227 * Context for record remove operations passed from
1228 * #run_zone_iteration_round to #zone_iterate_proc as closure
1230 struct ZoneIterationProcResult
1233 * The zone iteration handle
1235 struct ZoneIteration *zi;
1238 * Iteration result: iteration done?
1239 * #IT_SUCCESS_MORE_AVAILABLE: if there may be more results overall but
1240 * we got one for now and have sent it to the client
1241 * #IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE: if there are no further results,
1242 * #IT_START: if we are still trying to find a result.
1244 int res_iteration_finished;
1250 * Process results for zone iteration from database
1252 * @param cls struct ZoneIterationProcResult *proc
1253 * @param zone_key the zone key
1255 * @param rd_count number of records for this name
1256 * @param rd record data
1259 zone_iterate_proc (void *cls,
1260 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1262 unsigned int rd_count,
1263 const struct GNUNET_GNSRECORD_Data *rd)
1265 struct ZoneIterationProcResult *proc = cls;
1267 int do_refresh_block;
1269 if ((NULL == zone_key) && (NULL == name))
1271 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1272 "Iteration done\n");
1273 proc->res_iteration_finished = IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE;
1276 if ((NULL == zone_key) || (NULL == name))
1278 /* what is this!? should never happen */
1279 proc->res_iteration_finished = IT_START;
1283 proc->res_iteration_finished = IT_SUCCESS_MORE_AVAILABLE;
1284 send_lookup_response (snc,
1285 proc->zi->client->client,
1286 proc->zi->request_id,
1291 do_refresh_block = GNUNET_NO;
1292 for (i=0;i<rd_count;i++)
1293 if( (0 != (rd[i].flags & GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION)) &&
1294 (0 == (rd[i].flags & GNUNET_GNSRECORD_RF_PENDING)) )
1296 do_refresh_block = GNUNET_YES;
1299 if (GNUNET_YES == do_refresh_block)
1300 refresh_block (NULL, 0,
1310 * Perform the next round of the zone iteration.
1312 * @param zi zone iterator to process
1315 run_zone_iteration_round (struct ZoneIteration *zi)
1317 struct ZoneIterationProcResult proc;
1318 struct RecordResultMessage rrm;
1321 memset (&proc, 0, sizeof (proc));
1323 proc.res_iteration_finished = IT_START;
1324 while (IT_START == proc.res_iteration_finished)
1326 if (GNUNET_SYSERR ==
1327 (ret = GSN_database->iterate_records (GSN_database->cls,
1328 (0 == memcmp (&zi->zone, &zero, sizeof (zero)))
1332 &zone_iterate_proc, &proc)))
1337 if (GNUNET_NO == ret)
1338 proc.res_iteration_finished = IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE;
1341 if (IT_SUCCESS_MORE_AVAILABLE == proc.res_iteration_finished)
1343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1344 "More results available\n");
1345 return; /* more results later */
1347 /* send empty response to indicate end of list */
1348 memset (&rrm, 0, sizeof (rrm));
1349 rrm.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_RESULT);
1350 rrm.gns_header.header.size = htons (sizeof (rrm));
1351 rrm.gns_header.r_id = htonl (zi->request_id);
1352 GNUNET_SERVER_notification_context_unicast (snc,
1354 &rrm.gns_header.header,
1356 GNUNET_CONTAINER_DLL_remove (zi->client->op_head,
1357 zi->client->op_tail,
1364 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START message
1367 * @param client the client sending the message
1368 * @param message message of type 'struct ZoneIterationStartMessage'
1371 handle_iteration_start (void *cls,
1372 struct GNUNET_SERVER_Client *client,
1373 const struct GNUNET_MessageHeader *message)
1375 const struct ZoneIterationStartMessage *zis_msg;
1376 struct NamestoreClient *nc;
1377 struct ZoneIteration *zi;
1379 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ZONE_ITERATION_START");
1380 if (NULL == (nc = client_lookup (client)))
1383 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1386 zis_msg = (const struct ZoneIterationStartMessage *) message;
1387 zi = GNUNET_new (struct ZoneIteration);
1388 zi->request_id = ntohl (zis_msg->gns_header.r_id);
1391 zi->zone = zis_msg->zone;
1394 GNUNET_CONTAINER_DLL_insert (nc->op_head, nc->op_tail, zi);
1395 run_zone_iteration_round (zi);
1396 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1401 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP message
1404 * @param client GNUNET_SERVER_Client sending the message
1405 * @param message message of type 'struct ZoneIterationStopMessage'
1408 handle_iteration_stop (void *cls,
1409 struct GNUNET_SERVER_Client *client,
1410 const struct GNUNET_MessageHeader *message)
1412 struct NamestoreClient *nc;
1413 struct ZoneIteration *zi;
1414 const struct ZoneIterationStopMessage *zis_msg;
1417 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1418 "Received `%s' message\n",
1419 "ZONE_ITERATION_STOP");
1420 if (NULL == (nc = client_lookup(client)))
1423 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1426 zis_msg = (const struct ZoneIterationStopMessage *) message;
1427 rid = ntohl (zis_msg->gns_header.r_id);
1428 for (zi = nc->op_head; NULL != zi; zi = zi->next)
1429 if (zi->request_id == rid)
1434 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1437 GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, zi);
1439 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1444 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT message
1447 * @param client GNUNET_SERVER_Client sending the message
1448 * @param message message of type 'struct ZoneIterationNextMessage'
1451 handle_iteration_next (void *cls,
1452 struct GNUNET_SERVER_Client *client,
1453 const struct GNUNET_MessageHeader *message)
1455 struct NamestoreClient *nc;
1456 struct ZoneIteration *zi;
1457 const struct ZoneIterationNextMessage *zis_msg;
1460 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1461 "Received `%s' message\n",
1462 "ZONE_ITERATION_NEXT");
1463 if (NULL == (nc = client_lookup(client)))
1466 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1469 zis_msg = (const struct ZoneIterationNextMessage *) message;
1470 rid = ntohl (zis_msg->gns_header.r_id);
1471 for (zi = nc->op_head; NULL != zi; zi = zi->next)
1472 if (zi->request_id == rid)
1477 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1480 run_zone_iteration_round (zi);
1481 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1486 * Send 'sync' message to zone monitor, we're now in sync.
1488 * @param zm monitor that is now in sync
1491 monitor_sync (struct ZoneMonitor *zm)
1493 struct GNUNET_MessageHeader sync;
1495 sync.size = htons (sizeof (struct GNUNET_MessageHeader));
1496 sync.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_SYNC);
1497 GNUNET_SERVER_notification_context_unicast (monitor_nc,
1505 * Obtain the next datum during the zone monitor's zone intiial iteration.
1507 * @param cls zone monitor that does its initial iteration
1508 * @param tc scheduler context
1511 monitor_next (void *cls,
1512 const struct GNUNET_SCHEDULER_TaskContext *tc);
1516 * A #GNUNET_NAMESTORE_RecordIterator for monitors.
1518 * @param cls a 'struct ZoneMonitor *' with information about the monitor
1519 * @param zone_key zone key of the zone
1521 * @param rd_count number of records in @a rd
1522 * @param rd array of records
1525 monitor_iterate_cb (void *cls,
1526 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1528 unsigned int rd_count,
1529 const struct GNUNET_GNSRECORD_Data *rd)
1531 struct ZoneMonitor *zm = cls;
1535 /* finished with iteration */
1539 send_lookup_response (monitor_nc,
1546 zm->task = GNUNET_SCHEDULER_add_now (&monitor_next, zm);
1551 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_START message
1554 * @param client the client sending the message
1555 * @param message message of type 'struct ZoneMonitorStartMessage'
1558 handle_monitor_start (void *cls,
1559 struct GNUNET_SERVER_Client *client,
1560 const struct GNUNET_MessageHeader *message)
1562 const struct ZoneMonitorStartMessage *zis_msg;
1563 struct ZoneMonitor *zm;
1565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1566 "Received `%s' message\n",
1567 "ZONE_MONITOR_START");
1568 zis_msg = (const struct ZoneMonitorStartMessage *) message;
1569 zm = GNUNET_new (struct ZoneMonitor);
1571 zm->nc = client_lookup (client);
1572 zm->zone = zis_msg->zone;
1573 GNUNET_CONTAINER_DLL_insert (monitor_head, monitor_tail, zm);
1574 GNUNET_SERVER_client_mark_monitor (client);
1575 GNUNET_SERVER_disable_receive_done_warning (client);
1576 GNUNET_SERVER_notification_context_add (monitor_nc,
1578 if (GNUNET_YES == ntohl (zis_msg->iterate_first))
1579 zm->task = GNUNET_SCHEDULER_add_now (&monitor_next, zm);
1586 * Obtain the next datum during the zone monitor's zone intiial iteration.
1588 * @param cls zone monitor that does its initial iteration
1589 * @param tc scheduler context
1592 monitor_next (void *cls,
1593 const struct GNUNET_SCHEDULER_TaskContext *tc)
1595 struct ZoneMonitor *zm = cls;
1598 zm->task = GNUNET_SCHEDULER_NO_TASK;
1599 ret = GSN_database->iterate_records (GSN_database->cls,
1600 (0 == memcmp (&zm->zone, &zero, sizeof (zero)))
1604 &monitor_iterate_cb, zm);
1605 if (GNUNET_SYSERR == ret)
1607 GNUNET_SERVER_client_disconnect (zm->nc->client);
1610 if (GNUNET_NO == ret)
1620 * Process namestore requests.
1622 * @param cls closure
1623 * @param server the initialized server
1624 * @param cfg configuration to use
1627 run (void *cls, struct GNUNET_SERVER_Handle *server,
1628 const struct GNUNET_CONFIGURATION_Handle *cfg)
1630 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1631 {&handle_record_store, NULL,
1632 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE, 0},
1633 {&handle_record_lookup, NULL,
1634 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP, 0},
1635 {&handle_zone_to_name, NULL,
1636 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME, sizeof (struct ZoneToNameMessage) },
1637 {&handle_iteration_start, NULL,
1638 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START, sizeof (struct ZoneIterationStartMessage) },
1639 {&handle_iteration_next, NULL,
1640 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT, sizeof (struct ZoneIterationNextMessage) },
1641 {&handle_iteration_stop, NULL,
1642 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP, sizeof (struct ZoneIterationStopMessage) },
1643 {&handle_monitor_start, NULL,
1644 GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_START, sizeof (struct ZoneMonitorStartMessage) },
1649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting namestore service\n");
1651 monitor_nc = GNUNET_SERVER_notification_context_create (server, 1);
1652 namecache = GNUNET_NAMECACHE_connect (cfg);
1653 /* Loading database plugin */
1655 GNUNET_CONFIGURATION_get_value_string (cfg, "namestore", "database",
1657 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "No database backend configured\n");
1659 GNUNET_asprintf (&db_lib_name, "libgnunet_plugin_namestore_%s", database);
1660 GSN_database = GNUNET_PLUGIN_load (db_lib_name, (void *) GSN_cfg);
1661 GNUNET_free (database);
1662 if (NULL == GSN_database)
1664 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1665 "Could not load database backend `%s'\n",
1667 GNUNET_SCHEDULER_add_now (&cleanup_task, NULL);
1671 /* Configuring server handles */
1672 GNUNET_SERVER_add_handlers (server, handlers);
1673 snc = GNUNET_SERVER_notification_context_create (server, 16);
1674 GNUNET_SERVER_disconnect_notify (server,
1675 &client_disconnect_notification,
1677 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &cleanup_task,
1683 * The main function for the template service.
1685 * @param argc number of arguments from the command line
1686 * @param argv command line arguments
1687 * @return 0 ok, 1 on error
1690 main (int argc, char *const *argv)
1692 return (GNUNET_OK ==
1693 GNUNET_SERVICE_run (argc, argv, "namestore",
1694 GNUNET_SERVICE_OPTION_NONE, &run, NULL)) ? 0 : 1;
1697 /* end of gnunet-service-namestore.c */