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);
400 static void lookup_nick_it (void *cls,
401 const struct GNUNET_CRYPTO_EcdsaPrivateKey *private_key,
403 unsigned int rd_count,
404 const struct GNUNET_GNSRECORD_Data *rd)
406 struct GNUNET_GNSRECORD_Data **res = (cls);
409 if (0 != strcmp (label, GNUNET_GNS_MASTERZONE_STR))
414 for (c = 0; c < rd_count; c++)
416 if (GNUNET_GNSRECORD_TYPE_NICK == rd[c].record_type)
418 (*res) = GNUNET_malloc (rd[c].data_size + sizeof (struct GNUNET_GNSRECORD_Data));
419 (*res)->data = &(*res)[1];
420 memcpy ((char *)(*res)->data, rd[c].data, rd[c].data_size);
421 (*res)->data_size = rd[c].data_size;
422 (*res)->expiration_time = rd[c].expiration_time;
423 (*res)->flags = rd[c].flags;
424 (*res)->record_type = GNUNET_GNSRECORD_TYPE_NICK;
432 static struct GNUNET_GNSRECORD_Data *
433 get_nick_record (const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone)
435 struct GNUNET_CRYPTO_EcdsaPublicKey pub;
436 struct GNUNET_GNSRECORD_Data *nick;
439 res = GSN_database->lookup_records (GSN_database->cls, zone,
440 GNUNET_GNS_MASTERZONE_STR, &lookup_nick_it, &nick);
442 if ((NULL == nick) || (GNUNET_OK != res))
444 GNUNET_CRYPTO_ecdsa_key_get_public (zone, &pub);
445 GNUNET_log(GNUNET_ERROR_TYPE_INFO | GNUNET_ERROR_TYPE_BULK, "No nick name set for zone `%s'\n",
446 GNUNET_CRYPTO_ecdsa_public_key_to_string (&pub));
454 static void merge_records (unsigned int rdc1,
455 const struct GNUNET_GNSRECORD_Data *rd1,
457 const struct GNUNET_GNSRECORD_Data *rd2,
458 unsigned int *rdc_res,
459 struct GNUNET_GNSRECORD_Data **rd_res)
466 (*rdc_res) = rdc1 + rdc2;
468 if (0 == rdc1 + rdc2)
475 for (c=0; c< rdc1; c++)
476 req += sizeof (struct GNUNET_GNSRECORD_Data) + rd1[c].data_size;
477 for (c=0; c< rdc2; c++)
478 req += sizeof (struct GNUNET_GNSRECORD_Data) + rd2[c].data_size;
479 (*rd_res) = GNUNET_malloc (req);
480 data = (char *) &(*rd_res)[rdc1 + rdc2];
483 for (c=0; c< rdc1; c++)
485 (*rd_res)[c] = rd1[c];
486 (*rd_res)[c].data = (void *) &data[data_offset];
487 memcpy ((void *) (*rd_res)[c].data, rd1[c].data, rd1[c].data_size);
488 data_offset += (*rd_res)[c].data_size;
490 record_offset = rdc1;
491 for (c=0; c< rdc2; c++)
493 (*rd_res)[c+record_offset] = rd2[c];
494 (*rd_res)[c+record_offset].data = (void *) &data[data_offset];
495 memcpy ((void *) (*rd_res)[c+record_offset].data, rd2[c].data, rd2[c].data_size);
496 data_offset += (*rd_res)[c+record_offset].data_size;
498 GNUNET_assert (req == (sizeof (struct GNUNET_GNSRECORD_Data)) * (*rdc_res) + data_offset);
504 * Generate a 'struct LookupNameResponseMessage' and send it to the
505 * given client using the given notification context.
507 * @param nc notification context to use
508 * @param client client to unicast to
509 * @param request_id request ID to use
510 * @param zone_key zone key of the zone
512 * @param rd_count number of records in @a rd
513 * @param rd array of records
516 send_lookup_response (struct GNUNET_SERVER_NotificationContext *nc,
517 struct GNUNET_SERVER_Client *client,
519 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
521 unsigned int rd_count,
522 const struct GNUNET_GNSRECORD_Data *rd)
524 struct RecordResultMessage *zir_msg;
525 struct GNUNET_GNSRECORD_Data *nick;
526 struct GNUNET_GNSRECORD_Data *res;
527 unsigned int res_count;
534 nick = get_nick_record (zone_key);
535 if ((NULL != nick) && (0 != strcmp(name, GNUNET_GNS_MASTERZONE_STR)))
537 nick->flags = (nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
538 merge_records (rd_count,rd, 1, nick, &res_count, &res);
539 //fprintf (stderr, "Merging %u records for `%s' with NICK records\n",rd_count, name);
544 res_count = rd_count;
545 res = (struct GNUNET_GNSRECORD_Data *) rd;
546 //fprintf (stderr, "Not merging %u records for `%s' with NICK records\n",rd_count, name);
549 name_len = strlen (name) + 1;
550 rd_ser_len = GNUNET_GNSRECORD_records_get_size (res_count, res);
551 msg_size = sizeof (struct RecordResultMessage) + name_len + rd_ser_len;
552 (void) client_lookup (client);
553 zir_msg = GNUNET_malloc (msg_size);
554 zir_msg->gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_RESULT);
555 zir_msg->gns_header.header.size = htons (msg_size);
556 zir_msg->gns_header.r_id = htonl (request_id);
557 zir_msg->name_len = htons (name_len);
558 zir_msg->rd_count = htons (res_count);
559 zir_msg->rd_len = htons (rd_ser_len);
560 zir_msg->private_key = *zone_key;
561 name_tmp = (char *) &zir_msg[1];
562 memcpy (name_tmp, name, name_len);
563 rd_ser = &name_tmp[name_len];
564 GNUNET_GNSRECORD_records_serialize (res_count, res, rd_ser_len, rd_ser);
565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
566 "Sending `%s' message with %u records and size %u\n",
570 GNUNET_SERVER_notification_context_unicast (nc,
572 &zir_msg->gns_header.header,
576 GNUNET_free (zir_msg);
581 * Send response to the store request to the client.
583 * @param client client to talk to
584 * @param res status of the operation
585 * @param rid client's request ID
588 send_store_response (struct GNUNET_SERVER_Client *client,
592 struct RecordStoreResponseMessage rcr_msg;
594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
595 "Sending `%s' message\n",
596 "RECORD_STORE_RESPONSE");
597 rcr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE_RESPONSE);
598 rcr_msg.gns_header.header.size = htons (sizeof (struct RecordStoreResponseMessage));
599 rcr_msg.gns_header.r_id = htonl (rid);
600 rcr_msg.op_result = htonl (res);
601 GNUNET_SERVER_notification_context_unicast (snc, client,
602 &rcr_msg.gns_header.header,
608 * Cache operation complete, clean up.
610 * @param cls the `struct CacheOperation`
611 * @param success success
612 * @param emsg error messages
615 finish_cache_operation (void *cls,
619 struct CacheOperation *cop = cls;
622 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
623 _("Failed to replicate block in namecache: %s\n"),
626 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
627 "CACHE operation completed\n");
628 GNUNET_CONTAINER_DLL_remove (cop_head,
631 if (NULL != cop->client)
632 send_store_response (cop->client,
640 * We just touched the plaintext information about a name in our zone;
641 * refresh the corresponding (encrypted) block in the namecache.
643 * @param client client responsible for the request
644 * @param rid request ID of the client
645 * @param zone_key private key of the zone
646 * @param name label for the records
647 * @param rd_count number of records
648 * @param rd records stored under the given @a name
651 refresh_block (struct GNUNET_SERVER_Client *client,
653 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
655 unsigned int rd_count,
656 const struct GNUNET_GNSRECORD_Data *rd)
658 struct GNUNET_GNSRECORD_Block *block;
659 struct CacheOperation *cop;
660 struct GNUNET_CRYPTO_EcdsaPublicKey pkey;
663 block = GNUNET_GNSRECORD_block_create (zone_key,
664 GNUNET_TIME_UNIT_ZERO_ABS,
668 block = GNUNET_GNSRECORD_block_create (zone_key,
669 GNUNET_GNSRECORD_record_get_expiration_time (rd_count,
673 GNUNET_assert (NULL != block);
674 GNUNET_CRYPTO_ecdsa_key_get_public (zone_key,
676 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
677 "Caching block for label `%s' in zone `%s' in namecache\n",
679 GNUNET_GNSRECORD_z2s (&pkey));
680 cop = GNUNET_new (struct CacheOperation);
681 cop->client = client;
683 GNUNET_CONTAINER_DLL_insert (cop_head,
686 cop->qe = GNUNET_NAMECACHE_block_cache (namecache,
688 &finish_cache_operation,
694 struct RecordLookupContext
700 unsigned int res_rd_count;
706 struct GNUNET_GNSRECORD_Data *nick;
712 lookup_it (void *cls, const struct GNUNET_CRYPTO_EcdsaPrivateKey *private_key,
713 const char *label, unsigned int rd_count,
714 const struct GNUNET_GNSRECORD_Data *rd)
716 struct RecordLookupContext *rlc = cls;
717 struct GNUNET_GNSRECORD_Data *rd_res;
718 unsigned int rdc_res;
720 if (0 == strcmp (label, rlc->label))
722 rlc->found = GNUNET_YES;
725 if ((NULL != rlc->nick) && (0 != strcmp(label, GNUNET_GNS_MASTERZONE_STR)))
730 rlc->nick->flags = (rlc->nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
731 merge_records (rd_count, rd,
735 rlc->rd_ser_len = GNUNET_GNSRECORD_records_get_size (rdc_res, rd_res);
736 rlc->res_rd_count = rdc_res;
737 rlc->res_rd = GNUNET_malloc (rlc->rd_ser_len);
738 GNUNET_GNSRECORD_records_serialize (rdc_res, rd_res, rlc->rd_ser_len , rlc->res_rd);
740 GNUNET_free (rd_res);
741 GNUNET_free (rlc->nick);
746 rlc->rd_ser_len = GNUNET_GNSRECORD_records_get_size (rd_count, rd);
747 rlc->res_rd_count = rd_count;
748 rlc->res_rd = GNUNET_malloc (rlc->rd_ser_len);
749 GNUNET_GNSRECORD_records_serialize (rd_count, rd, rlc->rd_ser_len , rlc->res_rd);
755 rlc->res_rd_count = 0;
766 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP message
769 * @param client client sending the message
770 * @param message message of type 'struct RecordCreateMessage'
773 handle_record_lookup (void *cls,
774 struct GNUNET_SERVER_Client *client,
775 const struct GNUNET_MessageHeader *message)
777 const struct LabelLookupMessage *ll_msg;
778 struct LabelLookupResponseMessage *llr_msg;
779 struct RecordLookupContext rlc;
780 const char *name_tmp;
787 if (ntohs (message->size) < sizeof (struct LabelLookupMessage))
790 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
794 ll_msg = (const struct LabelLookupMessage *) message;
795 name_len = ntohl (ll_msg->label_len);
796 src_size = ntohs (message->size);
798 if (name_len != src_size - sizeof (struct LabelLookupMessage))
801 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
805 name_tmp = (const char *) &ll_msg[1];
806 if ('\0' != name_tmp[name_len -1])
809 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
813 GNUNET_SERVER_receive_done (client, GNUNET_OK);
814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
815 "Received `%s' message for name `%s'\n",
816 "NAMESTORE_RECORD_LOOKUP", name_tmp);
818 if (NULL == (client_lookup (client)))
821 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
825 rlc.label = name_tmp;
826 rlc.found = GNUNET_NO;
827 rlc.res_rd_count = 0;
830 rlc.nick = get_nick_record (&ll_msg->zone);
832 res = GSN_database->lookup_records (GSN_database->cls,
833 &ll_msg->zone, name_tmp, &lookup_it, &rlc);
835 res_size = sizeof (struct LabelLookupResponseMessage) + name_len + rlc.rd_ser_len;
836 llr_msg = GNUNET_malloc (res_size);
837 llr_msg->gns_header.header.size = htons (res_size);
838 llr_msg->gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP_RESPONSE);
839 llr_msg->gns_header.r_id = ll_msg->gns_header.r_id;
840 llr_msg->private_key = ll_msg->zone;
841 llr_msg->name_len = htons (name_len);
842 llr_msg->rd_count = htons (rlc.res_rd_count);
843 llr_msg->rd_len = htons (rlc.rd_ser_len);
844 res_name = (char *) &llr_msg[1];
845 if ((GNUNET_YES == rlc.found) && (GNUNET_OK == res))
846 llr_msg->found = ntohs (GNUNET_YES);
848 llr_msg->found = ntohs (GNUNET_NO);
849 memcpy (&llr_msg[1], name_tmp, name_len);
850 memcpy (&res_name[name_len], rlc.res_rd, rlc.rd_ser_len);
852 GNUNET_SERVER_notification_context_unicast (snc, client, &llr_msg->gns_header.header,
855 GNUNET_free_non_null (rlc.res_rd);
856 GNUNET_free (llr_msg);
861 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE message
864 * @param client client sending the message
865 * @param message message of type 'struct RecordCreateMessage'
868 handle_record_store (void *cls,
869 struct GNUNET_SERVER_Client *client,
870 const struct GNUNET_MessageHeader *message)
872 const struct RecordStoreMessage *rp_msg;
878 const char *name_tmp;
881 unsigned int rd_count;
883 struct GNUNET_CRYPTO_EcdsaPublicKey pubkey;
884 struct ZoneMonitor *zm;
886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
887 "Received `%s' message\n",
888 "NAMESTORE_RECORD_STORE");
889 if (ntohs (message->size) < sizeof (struct RecordStoreMessage))
892 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
895 rp_msg = (const struct RecordStoreMessage *) message;
896 rid = ntohl (rp_msg->gns_header.r_id);
897 name_len = ntohs (rp_msg->name_len);
898 msg_size = ntohs (message->size);
899 rd_count = ntohs (rp_msg->rd_count);
900 rd_ser_len = ntohs (rp_msg->rd_len);
901 GNUNET_break (0 == ntohs (rp_msg->reserved));
902 msg_size_exp = sizeof (struct RecordStoreMessage) + name_len + rd_ser_len;
903 if (msg_size != msg_size_exp)
906 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
909 if ((0 == name_len) || (name_len > MAX_NAME_LEN))
912 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
915 name_tmp = (const char *) &rp_msg[1];
916 rd_ser = &name_tmp[name_len];
917 if ('\0' != name_tmp[name_len -1])
920 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
923 (void) client_lookup (client);
925 struct GNUNET_GNSRECORD_Data rd[rd_count];
928 GNUNET_GNSRECORD_records_deserialize (rd_ser_len, rd_ser, rd_count, rd))
931 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
935 /* Extracting and converting private key */
936 GNUNET_CRYPTO_ecdsa_key_get_public (&rp_msg->private_key,
938 conv_name = GNUNET_GNSRECORD_string_to_lowercase (name_tmp);
939 if (NULL == conv_name)
941 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
942 "Error converting name `%s'\n", name_tmp);
943 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
946 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
947 "Creating %u records for name `%s' in zone `%s'\n",
948 (unsigned int) rd_count,
950 GNUNET_GNSRECORD_z2s (&pubkey));
952 if ( (0 == rd_count) &&
954 GSN_database->iterate_records (GSN_database->cls,
955 &rp_msg->private_key, 0, NULL, 0)) )
957 /* This name does not exist, so cannot be removed */
958 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
959 "Name `%s' does not exist, no deletion required\n",
965 res = GSN_database->store_records (GSN_database->cls,
966 &rp_msg->private_key,
969 if (GNUNET_OK == res)
971 for (zm = monitor_head; NULL != zm; zm = zm->next)
973 if ( (0 == memcmp (&rp_msg->private_key, &zm->zone,
974 sizeof (struct GNUNET_CRYPTO_EcdsaPrivateKey))) ||
975 (0 == memcmp (&zm->zone,
977 sizeof (struct GNUNET_CRYPTO_EcdsaPrivateKey))) )
979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
980 "Notifying monitor about changes under label `%s'\n",
982 send_lookup_response (monitor_nc,
985 &rp_msg->private_key,
990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
991 "Monitor is for another zone\n");
993 if (NULL == monitor_head)
994 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
995 "No monitors active\n");
999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1000 "Error storing record: %d\n",
1004 if (GNUNET_OK == res)
1006 refresh_block (client, rid,
1007 &rp_msg->private_key,
1010 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1011 GNUNET_free (conv_name);
1014 GNUNET_free (conv_name);
1016 send_store_response (client, res, rid);
1017 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1022 * Context for record remove operations passed from #handle_zone_to_name to
1023 * #handle_zone_to_name_it as closure
1025 struct ZoneToNameCtx
1030 struct NamestoreClient *nc;
1033 * Request id (to be used in the response to the client).
1038 * Set to #GNUNET_OK on success, #GNUNET_SYSERR on error. Note that
1039 * not finding a name for the zone still counts as a 'success' here,
1040 * as this field is about the success of executing the IPC protocol.
1047 * Zone to name iterator
1049 * @param cls struct ZoneToNameCtx *
1050 * @param zone_key the zone key
1052 * @param rd_count number of records in @a rd
1053 * @param rd record data
1056 handle_zone_to_name_it (void *cls,
1057 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1059 unsigned int rd_count,
1060 const struct GNUNET_GNSRECORD_Data *rd)
1062 struct ZoneToNameCtx *ztn_ctx = cls;
1063 struct ZoneToNameResponseMessage *ztnr_msg;
1071 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1072 "Found result for zone-to-name lookup: `%s'\n",
1075 name_len = (NULL == name) ? 0 : strlen (name) + 1;
1076 rd_ser_len = GNUNET_GNSRECORD_records_get_size (rd_count, rd);
1077 msg_size = sizeof (struct ZoneToNameResponseMessage) + name_len + rd_ser_len;
1078 if (msg_size >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1081 ztn_ctx->success = GNUNET_SYSERR;
1084 ztnr_msg = GNUNET_malloc (msg_size);
1085 ztnr_msg->gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME_RESPONSE);
1086 ztnr_msg->gns_header.header.size = htons (msg_size);
1087 ztnr_msg->gns_header.r_id = htonl (ztn_ctx->rid);
1088 ztnr_msg->res = htons (res);
1089 ztnr_msg->rd_len = htons (rd_ser_len);
1090 ztnr_msg->rd_count = htons (rd_count);
1091 ztnr_msg->name_len = htons (name_len);
1092 ztnr_msg->zone = *zone_key;
1093 name_tmp = (char *) &ztnr_msg[1];
1095 memcpy (name_tmp, name, name_len);
1096 rd_tmp = &name_tmp[name_len];
1097 GNUNET_GNSRECORD_records_serialize (rd_count, rd, rd_ser_len, rd_tmp);
1098 ztn_ctx->success = GNUNET_OK;
1099 GNUNET_SERVER_notification_context_unicast (snc, ztn_ctx->nc->client,
1100 &ztnr_msg->gns_header.header,
1102 GNUNET_free (ztnr_msg);
1107 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME message
1110 * @param client client sending the message
1111 * @param message message of type 'struct ZoneToNameMessage'
1114 handle_zone_to_name (void *cls,
1115 struct GNUNET_SERVER_Client *client,
1116 const struct GNUNET_MessageHeader *message)
1118 struct NamestoreClient *nc;
1119 const struct ZoneToNameMessage *ztn_msg;
1120 struct ZoneToNameCtx ztn_ctx;
1121 struct ZoneToNameResponseMessage ztnr_msg;
1123 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1124 "Received `%s' message\n",
1126 ztn_msg = (const struct ZoneToNameMessage *) message;
1127 nc = client_lookup (client);
1128 ztn_ctx.rid = ntohl (ztn_msg->gns_header.r_id);
1130 ztn_ctx.success = GNUNET_NO;
1131 if (GNUNET_SYSERR ==
1132 GSN_database->zone_to_name (GSN_database->cls,
1134 &ztn_msg->value_zone,
1135 &handle_zone_to_name_it, &ztn_ctx))
1137 /* internal error, hang up instead of signalling something
1138 that might be wrong */
1140 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1143 if (GNUNET_NO == ztn_ctx.success)
1145 /* no result found, send empty response */
1146 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1147 "Found no result for zone-to-name lookup.\n");
1148 memset (&ztnr_msg, 0, sizeof (ztnr_msg));
1149 ztnr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME_RESPONSE);
1150 ztnr_msg.gns_header.header.size = htons (sizeof (ztnr_msg));
1151 ztnr_msg.gns_header.r_id = ztn_msg->gns_header.r_id;
1152 ztnr_msg.res = htons (GNUNET_NO);
1153 GNUNET_SERVER_notification_context_unicast (snc,
1155 &ztnr_msg.gns_header.header,
1158 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1163 * Zone iteration processor result
1165 enum ZoneIterationResult
1174 * Continue to iterate with next iteration_next call
1176 IT_SUCCESS_MORE_AVAILABLE = 1,
1179 * Iteration complete
1181 IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE = 2
1186 * Context for record remove operations passed from
1187 * #run_zone_iteration_round to #zone_iterate_proc as closure
1189 struct ZoneIterationProcResult
1192 * The zone iteration handle
1194 struct ZoneIteration *zi;
1197 * Iteration result: iteration done?
1198 * #IT_SUCCESS_MORE_AVAILABLE: if there may be more results overall but
1199 * we got one for now and have sent it to the client
1200 * #IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE: if there are no further results,
1201 * #IT_START: if we are still trying to find a result.
1203 int res_iteration_finished;
1209 * Process results for zone iteration from database
1211 * @param cls struct ZoneIterationProcResult *proc
1212 * @param zone_key the zone key
1214 * @param rd_count number of records for this name
1215 * @param rd record data
1218 zone_iterate_proc (void *cls,
1219 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1221 unsigned int rd_count,
1222 const struct GNUNET_GNSRECORD_Data *rd)
1224 struct ZoneIterationProcResult *proc = cls;
1226 int do_refresh_block;
1228 if ((NULL == zone_key) && (NULL == name))
1230 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1231 "Iteration done\n");
1232 proc->res_iteration_finished = IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE;
1235 if ((NULL == zone_key) || (NULL == name))
1237 /* what is this!? should never happen */
1238 proc->res_iteration_finished = IT_START;
1242 proc->res_iteration_finished = IT_SUCCESS_MORE_AVAILABLE;
1243 send_lookup_response (snc,
1244 proc->zi->client->client,
1245 proc->zi->request_id,
1250 do_refresh_block = GNUNET_NO;
1251 for (i=0;i<rd_count;i++)
1252 if( (0 != (rd[i].flags & GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION)) &&
1253 (0 == (rd[i].flags & GNUNET_GNSRECORD_RF_PENDING)) )
1255 do_refresh_block = GNUNET_YES;
1258 if (GNUNET_YES == do_refresh_block)
1259 refresh_block (NULL, 0,
1269 * Perform the next round of the zone iteration.
1271 * @param zi zone iterator to process
1274 run_zone_iteration_round (struct ZoneIteration *zi)
1276 struct ZoneIterationProcResult proc;
1277 struct RecordResultMessage rrm;
1280 memset (&proc, 0, sizeof (proc));
1282 proc.res_iteration_finished = IT_START;
1283 while (IT_START == proc.res_iteration_finished)
1285 if (GNUNET_SYSERR ==
1286 (ret = GSN_database->iterate_records (GSN_database->cls,
1287 (0 == memcmp (&zi->zone, &zero, sizeof (zero)))
1291 &zone_iterate_proc, &proc)))
1296 if (GNUNET_NO == ret)
1297 proc.res_iteration_finished = IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE;
1300 if (IT_SUCCESS_MORE_AVAILABLE == proc.res_iteration_finished)
1302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1303 "More results available\n");
1304 return; /* more results later */
1306 /* send empty response to indicate end of list */
1307 memset (&rrm, 0, sizeof (rrm));
1308 rrm.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_RESULT);
1309 rrm.gns_header.header.size = htons (sizeof (rrm));
1310 rrm.gns_header.r_id = htonl (zi->request_id);
1311 GNUNET_SERVER_notification_context_unicast (snc,
1313 &rrm.gns_header.header,
1315 GNUNET_CONTAINER_DLL_remove (zi->client->op_head,
1316 zi->client->op_tail,
1323 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START message
1326 * @param client the client sending the message
1327 * @param message message of type 'struct ZoneIterationStartMessage'
1330 handle_iteration_start (void *cls,
1331 struct GNUNET_SERVER_Client *client,
1332 const struct GNUNET_MessageHeader *message)
1334 const struct ZoneIterationStartMessage *zis_msg;
1335 struct NamestoreClient *nc;
1336 struct ZoneIteration *zi;
1338 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ZONE_ITERATION_START");
1339 if (NULL == (nc = client_lookup (client)))
1342 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1345 zis_msg = (const struct ZoneIterationStartMessage *) message;
1346 zi = GNUNET_new (struct ZoneIteration);
1347 zi->request_id = ntohl (zis_msg->gns_header.r_id);
1350 zi->zone = zis_msg->zone;
1353 GNUNET_CONTAINER_DLL_insert (nc->op_head, nc->op_tail, zi);
1354 run_zone_iteration_round (zi);
1355 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1360 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP message
1363 * @param client GNUNET_SERVER_Client sending the message
1364 * @param message message of type 'struct ZoneIterationStopMessage'
1367 handle_iteration_stop (void *cls,
1368 struct GNUNET_SERVER_Client *client,
1369 const struct GNUNET_MessageHeader *message)
1371 struct NamestoreClient *nc;
1372 struct ZoneIteration *zi;
1373 const struct ZoneIterationStopMessage *zis_msg;
1376 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1377 "Received `%s' message\n",
1378 "ZONE_ITERATION_STOP");
1379 if (NULL == (nc = client_lookup(client)))
1382 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1385 zis_msg = (const struct ZoneIterationStopMessage *) message;
1386 rid = ntohl (zis_msg->gns_header.r_id);
1387 for (zi = nc->op_head; NULL != zi; zi = zi->next)
1388 if (zi->request_id == rid)
1393 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1396 GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, zi);
1398 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1403 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT message
1406 * @param client GNUNET_SERVER_Client sending the message
1407 * @param message message of type 'struct ZoneIterationNextMessage'
1410 handle_iteration_next (void *cls,
1411 struct GNUNET_SERVER_Client *client,
1412 const struct GNUNET_MessageHeader *message)
1414 struct NamestoreClient *nc;
1415 struct ZoneIteration *zi;
1416 const struct ZoneIterationNextMessage *zis_msg;
1419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1420 "Received `%s' message\n",
1421 "ZONE_ITERATION_NEXT");
1422 if (NULL == (nc = client_lookup(client)))
1425 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1428 zis_msg = (const struct ZoneIterationNextMessage *) message;
1429 rid = ntohl (zis_msg->gns_header.r_id);
1430 for (zi = nc->op_head; NULL != zi; zi = zi->next)
1431 if (zi->request_id == rid)
1436 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1439 run_zone_iteration_round (zi);
1440 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1445 * Send 'sync' message to zone monitor, we're now in sync.
1447 * @param zm monitor that is now in sync
1450 monitor_sync (struct ZoneMonitor *zm)
1452 struct GNUNET_MessageHeader sync;
1454 sync.size = htons (sizeof (struct GNUNET_MessageHeader));
1455 sync.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_SYNC);
1456 GNUNET_SERVER_notification_context_unicast (monitor_nc,
1464 * Obtain the next datum during the zone monitor's zone intiial iteration.
1466 * @param cls zone monitor that does its initial iteration
1467 * @param tc scheduler context
1470 monitor_next (void *cls,
1471 const struct GNUNET_SCHEDULER_TaskContext *tc);
1475 * A #GNUNET_NAMESTORE_RecordIterator for monitors.
1477 * @param cls a 'struct ZoneMonitor *' with information about the monitor
1478 * @param zone_key zone key of the zone
1480 * @param rd_count number of records in @a rd
1481 * @param rd array of records
1484 monitor_iterate_cb (void *cls,
1485 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1487 unsigned int rd_count,
1488 const struct GNUNET_GNSRECORD_Data *rd)
1490 struct ZoneMonitor *zm = cls;
1494 /* finished with iteration */
1498 send_lookup_response (monitor_nc,
1505 zm->task = GNUNET_SCHEDULER_add_now (&monitor_next, zm);
1510 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_START message
1513 * @param client the client sending the message
1514 * @param message message of type 'struct ZoneMonitorStartMessage'
1517 handle_monitor_start (void *cls,
1518 struct GNUNET_SERVER_Client *client,
1519 const struct GNUNET_MessageHeader *message)
1521 const struct ZoneMonitorStartMessage *zis_msg;
1522 struct ZoneMonitor *zm;
1524 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1525 "Received `%s' message\n",
1526 "ZONE_MONITOR_START");
1527 zis_msg = (const struct ZoneMonitorStartMessage *) message;
1528 zm = GNUNET_new (struct ZoneMonitor);
1530 zm->nc = client_lookup (client);
1531 zm->zone = zis_msg->zone;
1532 GNUNET_CONTAINER_DLL_insert (monitor_head, monitor_tail, zm);
1533 GNUNET_SERVER_client_mark_monitor (client);
1534 GNUNET_SERVER_disable_receive_done_warning (client);
1535 GNUNET_SERVER_notification_context_add (monitor_nc,
1537 if (GNUNET_YES == ntohl (zis_msg->iterate_first))
1538 zm->task = GNUNET_SCHEDULER_add_now (&monitor_next, zm);
1545 * Obtain the next datum during the zone monitor's zone intiial iteration.
1547 * @param cls zone monitor that does its initial iteration
1548 * @param tc scheduler context
1551 monitor_next (void *cls,
1552 const struct GNUNET_SCHEDULER_TaskContext *tc)
1554 struct ZoneMonitor *zm = cls;
1557 zm->task = GNUNET_SCHEDULER_NO_TASK;
1558 ret = GSN_database->iterate_records (GSN_database->cls,
1559 (0 == memcmp (&zm->zone, &zero, sizeof (zero)))
1563 &monitor_iterate_cb, zm);
1564 if (GNUNET_SYSERR == ret)
1566 GNUNET_SERVER_client_disconnect (zm->nc->client);
1569 if (GNUNET_NO == ret)
1579 * Process namestore requests.
1581 * @param cls closure
1582 * @param server the initialized server
1583 * @param cfg configuration to use
1586 run (void *cls, struct GNUNET_SERVER_Handle *server,
1587 const struct GNUNET_CONFIGURATION_Handle *cfg)
1589 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1590 {&handle_record_store, NULL,
1591 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE, 0},
1592 {&handle_record_lookup, NULL,
1593 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP, 0},
1594 {&handle_zone_to_name, NULL,
1595 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME, sizeof (struct ZoneToNameMessage) },
1596 {&handle_iteration_start, NULL,
1597 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START, sizeof (struct ZoneIterationStartMessage) },
1598 {&handle_iteration_next, NULL,
1599 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT, sizeof (struct ZoneIterationNextMessage) },
1600 {&handle_iteration_stop, NULL,
1601 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP, sizeof (struct ZoneIterationStopMessage) },
1602 {&handle_monitor_start, NULL,
1603 GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_START, sizeof (struct ZoneMonitorStartMessage) },
1608 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting namestore service\n");
1610 monitor_nc = GNUNET_SERVER_notification_context_create (server, 1);
1611 namecache = GNUNET_NAMECACHE_connect (cfg);
1612 /* Loading database plugin */
1614 GNUNET_CONFIGURATION_get_value_string (cfg, "namestore", "database",
1616 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "No database backend configured\n");
1618 GNUNET_asprintf (&db_lib_name, "libgnunet_plugin_namestore_%s", database);
1619 GSN_database = GNUNET_PLUGIN_load (db_lib_name, (void *) GSN_cfg);
1620 GNUNET_free (database);
1621 if (NULL == GSN_database)
1623 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1624 "Could not load database backend `%s'\n",
1626 GNUNET_SCHEDULER_add_now (&cleanup_task, NULL);
1630 /* Configuring server handles */
1631 GNUNET_SERVER_add_handlers (server, handlers);
1632 snc = GNUNET_SERVER_notification_context_create (server, 16);
1633 GNUNET_SERVER_disconnect_notify (server,
1634 &client_disconnect_notification,
1636 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &cleanup_task,
1642 * The main function for the template service.
1644 * @param argc number of arguments from the command line
1645 * @param argv command line arguments
1646 * @return 0 ok, 1 on error
1649 main (int argc, char *const *argv)
1651 return (GNUNET_OK ==
1652 GNUNET_SERVICE_run (argc, argv, "namestore",
1653 GNUNET_SERVICE_OPTION_NONE, &run, NULL)) ? 0 : 1;
1656 /* end of gnunet-service-namestore.c */