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];
498 memcpy ((void *) (*rd_res)[c].data, rd2[c].data, rd2[c].data_size);
499 data_offset += (*rd_res)[c].data_size;
501 record_offset = rdc2;
504 (*rd_res)[c+record_offset] = nick_rd[c];
505 (*rd_res)[c+record_offset].expiration_time = latest_expiration;
506 (*rd_res)[c+record_offset].data = (void *) &data[data_offset];
507 memcpy ((void *) (*rd_res)[c+record_offset].data, nick_rd[c].data, nick_rd[c].data_size);
508 data_offset += (*rd_res)[c+record_offset].data_size;
510 GNUNET_assert (req == (sizeof (struct GNUNET_GNSRECORD_Data)) * (*rdc_res) + data_offset);
515 * Generate a 'struct LookupNameResponseMessage' and send it to the
516 * given client using the given notification context.
518 * @param nc notification context to use
519 * @param client client to unicast to
520 * @param request_id request ID to use
521 * @param zone_key zone key of the zone
523 * @param rd_count number of records in @a rd
524 * @param rd array of records
527 send_lookup_response (struct GNUNET_SERVER_NotificationContext *nc,
528 struct GNUNET_SERVER_Client *client,
530 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
532 unsigned int rd_count,
533 const struct GNUNET_GNSRECORD_Data *rd)
535 struct RecordResultMessage *zir_msg;
536 struct GNUNET_GNSRECORD_Data *nick;
537 struct GNUNET_GNSRECORD_Data *res;
538 unsigned int res_count;
545 nick = get_nick_record (zone_key);
546 if ((NULL != nick) && (0 != strcmp(name, GNUNET_GNS_MASTERZONE_STR)))
548 nick->flags = (nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
549 merge_with_nick_records (nick, rd_count,rd, &res_count, &res);
550 //fprintf (stderr, "Merging %u records for `%s' with NICK records\n",rd_count, name);
555 res_count = rd_count;
556 res = (struct GNUNET_GNSRECORD_Data *) rd;
557 //fprintf (stderr, "Not merging %u records for `%s' with NICK records\n",rd_count, name);
560 name_len = strlen (name) + 1;
561 rd_ser_len = GNUNET_GNSRECORD_records_get_size (res_count, res);
562 msg_size = sizeof (struct RecordResultMessage) + name_len + rd_ser_len;
563 (void) client_lookup (client);
564 zir_msg = GNUNET_malloc (msg_size);
565 zir_msg->gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_RESULT);
566 zir_msg->gns_header.header.size = htons (msg_size);
567 zir_msg->gns_header.r_id = htonl (request_id);
568 zir_msg->name_len = htons (name_len);
569 zir_msg->rd_count = htons (res_count);
570 zir_msg->rd_len = htons (rd_ser_len);
571 zir_msg->private_key = *zone_key;
572 name_tmp = (char *) &zir_msg[1];
573 memcpy (name_tmp, name, name_len);
574 rd_ser = &name_tmp[name_len];
575 GNUNET_GNSRECORD_records_serialize (res_count, res, rd_ser_len, rd_ser);
576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
577 "Sending `%s' message with %u records and size %u\n",
581 GNUNET_SERVER_notification_context_unicast (nc,
583 &zir_msg->gns_header.header,
587 GNUNET_free (zir_msg);
592 * Send response to the store request to the client.
594 * @param client client to talk to
595 * @param res status of the operation
596 * @param rid client's request ID
599 send_store_response (struct GNUNET_SERVER_Client *client,
603 struct RecordStoreResponseMessage rcr_msg;
605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
606 "Sending `%s' message\n",
607 "RECORD_STORE_RESPONSE");
608 rcr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE_RESPONSE);
609 rcr_msg.gns_header.header.size = htons (sizeof (struct RecordStoreResponseMessage));
610 rcr_msg.gns_header.r_id = htonl (rid);
611 rcr_msg.op_result = htonl (res);
612 GNUNET_SERVER_notification_context_unicast (snc, client,
613 &rcr_msg.gns_header.header,
619 * Cache operation complete, clean up.
621 * @param cls the `struct CacheOperation`
622 * @param success success
623 * @param emsg error messages
626 finish_cache_operation (void *cls,
630 struct CacheOperation *cop = cls;
633 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
634 _("Failed to replicate block in namecache: %s\n"),
637 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
638 "CACHE operation completed\n");
639 GNUNET_CONTAINER_DLL_remove (cop_head,
642 if (NULL != cop->client)
643 send_store_response (cop->client,
651 * We just touched the plaintext information about a name in our zone;
652 * refresh the corresponding (encrypted) block in the namecache.
654 * @param client client responsible for the request
655 * @param rid request ID of the client
656 * @param zone_key private key of the zone
657 * @param name label for the records
658 * @param rd_count number of records
659 * @param rd records stored under the given @a name
662 refresh_block (struct GNUNET_SERVER_Client *client,
664 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
666 unsigned int rd_count,
667 const struct GNUNET_GNSRECORD_Data *rd)
669 struct GNUNET_GNSRECORD_Block *block;
670 struct CacheOperation *cop;
671 struct GNUNET_CRYPTO_EcdsaPublicKey pkey;
672 struct GNUNET_GNSRECORD_Data *nick;
673 struct GNUNET_GNSRECORD_Data *res;
674 unsigned int res_count;
676 nick = get_nick_record (zone_key);
677 res_count = rd_count;
678 res = (struct GNUNET_GNSRECORD_Data *) rd; /* fixme: a bit unclean... */
681 nick->flags = (nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
682 merge_with_nick_records (nick, rd_count,rd, &res_count, &res);
687 block = GNUNET_GNSRECORD_block_create (zone_key,
688 GNUNET_TIME_UNIT_ZERO_ABS,
692 block = GNUNET_GNSRECORD_block_create (zone_key,
693 GNUNET_GNSRECORD_record_get_expiration_time (res_count,
697 GNUNET_assert (NULL != block);
698 GNUNET_CRYPTO_ecdsa_key_get_public (zone_key,
700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
701 "Caching block for label `%s' with %u records in zone `%s' in namecache\n",
704 GNUNET_GNSRECORD_z2s (&pkey));
705 cop = GNUNET_new (struct CacheOperation);
706 cop->client = client;
708 GNUNET_CONTAINER_DLL_insert (cop_head,
711 cop->qe = GNUNET_NAMECACHE_block_cache (namecache,
713 &finish_cache_operation,
719 struct RecordLookupContext
725 unsigned int res_rd_count;
731 struct GNUNET_GNSRECORD_Data *nick;
737 lookup_it (void *cls, const struct GNUNET_CRYPTO_EcdsaPrivateKey *private_key,
738 const char *label, unsigned int rd_count,
739 const struct GNUNET_GNSRECORD_Data *rd)
741 struct RecordLookupContext *rlc = cls;
742 struct GNUNET_GNSRECORD_Data *rd_res;
743 unsigned int rdc_res;
745 if (0 == strcmp (label, rlc->label))
747 rlc->found = GNUNET_YES;
750 if ((NULL != rlc->nick) && (0 != strcmp(label, GNUNET_GNS_MASTERZONE_STR)))
755 rlc->nick->flags = (rlc->nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
756 merge_with_nick_records ( rlc->nick,
760 rlc->rd_ser_len = GNUNET_GNSRECORD_records_get_size (rdc_res, rd_res);
761 rlc->res_rd_count = rdc_res;
762 rlc->res_rd = GNUNET_malloc (rlc->rd_ser_len);
763 GNUNET_GNSRECORD_records_serialize (rdc_res, rd_res, rlc->rd_ser_len , rlc->res_rd);
765 GNUNET_free (rd_res);
766 GNUNET_free (rlc->nick);
771 rlc->rd_ser_len = GNUNET_GNSRECORD_records_get_size (rd_count, rd);
772 rlc->res_rd_count = rd_count;
773 rlc->res_rd = GNUNET_malloc (rlc->rd_ser_len);
774 GNUNET_GNSRECORD_records_serialize (rd_count, rd, rlc->rd_ser_len , rlc->res_rd);
780 rlc->res_rd_count = 0;
791 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP message
794 * @param client client sending the message
795 * @param message message of type 'struct RecordCreateMessage'
798 handle_record_lookup (void *cls,
799 struct GNUNET_SERVER_Client *client,
800 const struct GNUNET_MessageHeader *message)
802 const struct LabelLookupMessage *ll_msg;
803 struct LabelLookupResponseMessage *llr_msg;
804 struct RecordLookupContext rlc;
805 const char *name_tmp;
812 if (ntohs (message->size) < sizeof (struct LabelLookupMessage))
815 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
819 ll_msg = (const struct LabelLookupMessage *) message;
820 name_len = ntohl (ll_msg->label_len);
821 src_size = ntohs (message->size);
823 if (name_len != src_size - sizeof (struct LabelLookupMessage))
826 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
830 name_tmp = (const char *) &ll_msg[1];
831 if ('\0' != name_tmp[name_len -1])
834 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
838 GNUNET_SERVER_receive_done (client, GNUNET_OK);
839 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
840 "Received `%s' message for name `%s'\n",
841 "NAMESTORE_RECORD_LOOKUP", name_tmp);
843 if (NULL == (client_lookup (client)))
846 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
850 rlc.label = name_tmp;
851 rlc.found = GNUNET_NO;
852 rlc.res_rd_count = 0;
855 rlc.nick = get_nick_record (&ll_msg->zone);
857 res = GSN_database->lookup_records (GSN_database->cls,
858 &ll_msg->zone, name_tmp, &lookup_it, &rlc);
860 res_size = sizeof (struct LabelLookupResponseMessage) + name_len + rlc.rd_ser_len;
861 llr_msg = GNUNET_malloc (res_size);
862 llr_msg->gns_header.header.size = htons (res_size);
863 llr_msg->gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP_RESPONSE);
864 llr_msg->gns_header.r_id = ll_msg->gns_header.r_id;
865 llr_msg->private_key = ll_msg->zone;
866 llr_msg->name_len = htons (name_len);
867 llr_msg->rd_count = htons (rlc.res_rd_count);
868 llr_msg->rd_len = htons (rlc.rd_ser_len);
869 res_name = (char *) &llr_msg[1];
870 if ((GNUNET_YES == rlc.found) && (GNUNET_OK == res))
871 llr_msg->found = ntohs (GNUNET_YES);
873 llr_msg->found = ntohs (GNUNET_NO);
874 memcpy (&llr_msg[1], name_tmp, name_len);
875 memcpy (&res_name[name_len], rlc.res_rd, rlc.rd_ser_len);
877 GNUNET_SERVER_notification_context_unicast (snc, client, &llr_msg->gns_header.header,
880 GNUNET_free_non_null (rlc.res_rd);
881 GNUNET_free (llr_msg);
886 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE message
889 * @param client client sending the message
890 * @param message message of type 'struct RecordCreateMessage'
893 handle_record_store (void *cls,
894 struct GNUNET_SERVER_Client *client,
895 const struct GNUNET_MessageHeader *message)
897 const struct RecordStoreMessage *rp_msg;
903 const char *name_tmp;
906 unsigned int rd_count;
908 struct GNUNET_CRYPTO_EcdsaPublicKey pubkey;
909 struct ZoneMonitor *zm;
911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
912 "Received `%s' message\n",
913 "NAMESTORE_RECORD_STORE");
914 if (ntohs (message->size) < sizeof (struct RecordStoreMessage))
917 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
920 rp_msg = (const struct RecordStoreMessage *) message;
921 rid = ntohl (rp_msg->gns_header.r_id);
922 name_len = ntohs (rp_msg->name_len);
923 msg_size = ntohs (message->size);
924 rd_count = ntohs (rp_msg->rd_count);
925 rd_ser_len = ntohs (rp_msg->rd_len);
926 GNUNET_break (0 == ntohs (rp_msg->reserved));
927 msg_size_exp = sizeof (struct RecordStoreMessage) + name_len + rd_ser_len;
928 if (msg_size != msg_size_exp)
931 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
934 if ((0 == name_len) || (name_len > MAX_NAME_LEN))
937 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
940 name_tmp = (const char *) &rp_msg[1];
941 rd_ser = &name_tmp[name_len];
942 if ('\0' != name_tmp[name_len -1])
945 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
948 (void) client_lookup (client);
950 struct GNUNET_GNSRECORD_Data rd[rd_count];
953 GNUNET_GNSRECORD_records_deserialize (rd_ser_len, rd_ser, rd_count, rd))
956 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
960 /* Extracting and converting private key */
961 GNUNET_CRYPTO_ecdsa_key_get_public (&rp_msg->private_key,
963 conv_name = GNUNET_GNSRECORD_string_to_lowercase (name_tmp);
964 if (NULL == conv_name)
966 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
967 "Error converting name `%s'\n", name_tmp);
968 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
972 "Creating %u records for name `%s' in zone `%s'\n",
973 (unsigned int) rd_count,
975 GNUNET_GNSRECORD_z2s (&pubkey));
977 if ( (0 == rd_count) &&
979 GSN_database->iterate_records (GSN_database->cls,
980 &rp_msg->private_key, 0, NULL, 0)) )
982 /* This name does not exist, so cannot be removed */
983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
984 "Name `%s' does not exist, no deletion required\n",
990 res = GSN_database->store_records (GSN_database->cls,
991 &rp_msg->private_key,
994 if (GNUNET_OK == res)
996 for (zm = monitor_head; NULL != zm; zm = zm->next)
998 if ( (0 == memcmp (&rp_msg->private_key, &zm->zone,
999 sizeof (struct GNUNET_CRYPTO_EcdsaPrivateKey))) ||
1000 (0 == memcmp (&zm->zone,
1002 sizeof (struct GNUNET_CRYPTO_EcdsaPrivateKey))) )
1004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1005 "Notifying monitor about changes under label `%s'\n",
1007 send_lookup_response (monitor_nc,
1010 &rp_msg->private_key,
1015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1016 "Monitor is for another zone\n");
1018 if (NULL == monitor_head)
1019 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1020 "No monitors active\n");
1024 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1025 "Error storing record: %d\n",
1029 if (GNUNET_OK == res)
1031 refresh_block (client, rid,
1032 &rp_msg->private_key,
1035 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1036 GNUNET_free (conv_name);
1039 GNUNET_free (conv_name);
1041 send_store_response (client, res, rid);
1042 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1047 * Context for record remove operations passed from #handle_zone_to_name to
1048 * #handle_zone_to_name_it as closure
1050 struct ZoneToNameCtx
1055 struct NamestoreClient *nc;
1058 * Request id (to be used in the response to the client).
1063 * Set to #GNUNET_OK on success, #GNUNET_SYSERR on error. Note that
1064 * not finding a name for the zone still counts as a 'success' here,
1065 * as this field is about the success of executing the IPC protocol.
1072 * Zone to name iterator
1074 * @param cls struct ZoneToNameCtx *
1075 * @param zone_key the zone key
1077 * @param rd_count number of records in @a rd
1078 * @param rd record data
1081 handle_zone_to_name_it (void *cls,
1082 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1084 unsigned int rd_count,
1085 const struct GNUNET_GNSRECORD_Data *rd)
1087 struct ZoneToNameCtx *ztn_ctx = cls;
1088 struct ZoneToNameResponseMessage *ztnr_msg;
1096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1097 "Found result for zone-to-name lookup: `%s'\n",
1100 name_len = (NULL == name) ? 0 : strlen (name) + 1;
1101 rd_ser_len = GNUNET_GNSRECORD_records_get_size (rd_count, rd);
1102 msg_size = sizeof (struct ZoneToNameResponseMessage) + name_len + rd_ser_len;
1103 if (msg_size >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
1106 ztn_ctx->success = GNUNET_SYSERR;
1109 ztnr_msg = GNUNET_malloc (msg_size);
1110 ztnr_msg->gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME_RESPONSE);
1111 ztnr_msg->gns_header.header.size = htons (msg_size);
1112 ztnr_msg->gns_header.r_id = htonl (ztn_ctx->rid);
1113 ztnr_msg->res = htons (res);
1114 ztnr_msg->rd_len = htons (rd_ser_len);
1115 ztnr_msg->rd_count = htons (rd_count);
1116 ztnr_msg->name_len = htons (name_len);
1117 ztnr_msg->zone = *zone_key;
1118 name_tmp = (char *) &ztnr_msg[1];
1120 memcpy (name_tmp, name, name_len);
1121 rd_tmp = &name_tmp[name_len];
1122 GNUNET_GNSRECORD_records_serialize (rd_count, rd, rd_ser_len, rd_tmp);
1123 ztn_ctx->success = GNUNET_OK;
1124 GNUNET_SERVER_notification_context_unicast (snc, ztn_ctx->nc->client,
1125 &ztnr_msg->gns_header.header,
1127 GNUNET_free (ztnr_msg);
1132 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME message
1135 * @param client client sending the message
1136 * @param message message of type 'struct ZoneToNameMessage'
1139 handle_zone_to_name (void *cls,
1140 struct GNUNET_SERVER_Client *client,
1141 const struct GNUNET_MessageHeader *message)
1143 struct NamestoreClient *nc;
1144 const struct ZoneToNameMessage *ztn_msg;
1145 struct ZoneToNameCtx ztn_ctx;
1146 struct ZoneToNameResponseMessage ztnr_msg;
1148 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1149 "Received `%s' message\n",
1151 ztn_msg = (const struct ZoneToNameMessage *) message;
1152 nc = client_lookup (client);
1153 ztn_ctx.rid = ntohl (ztn_msg->gns_header.r_id);
1155 ztn_ctx.success = GNUNET_NO;
1156 if (GNUNET_SYSERR ==
1157 GSN_database->zone_to_name (GSN_database->cls,
1159 &ztn_msg->value_zone,
1160 &handle_zone_to_name_it, &ztn_ctx))
1162 /* internal error, hang up instead of signalling something
1163 that might be wrong */
1165 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1168 if (GNUNET_NO == ztn_ctx.success)
1170 /* no result found, send empty response */
1171 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1172 "Found no result for zone-to-name lookup.\n");
1173 memset (&ztnr_msg, 0, sizeof (ztnr_msg));
1174 ztnr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME_RESPONSE);
1175 ztnr_msg.gns_header.header.size = htons (sizeof (ztnr_msg));
1176 ztnr_msg.gns_header.r_id = ztn_msg->gns_header.r_id;
1177 ztnr_msg.res = htons (GNUNET_NO);
1178 GNUNET_SERVER_notification_context_unicast (snc,
1180 &ztnr_msg.gns_header.header,
1183 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1188 * Zone iteration processor result
1190 enum ZoneIterationResult
1199 * Continue to iterate with next iteration_next call
1201 IT_SUCCESS_MORE_AVAILABLE = 1,
1204 * Iteration complete
1206 IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE = 2
1211 * Context for record remove operations passed from
1212 * #run_zone_iteration_round to #zone_iterate_proc as closure
1214 struct ZoneIterationProcResult
1217 * The zone iteration handle
1219 struct ZoneIteration *zi;
1222 * Iteration result: iteration done?
1223 * #IT_SUCCESS_MORE_AVAILABLE: if there may be more results overall but
1224 * we got one for now and have sent it to the client
1225 * #IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE: if there are no further results,
1226 * #IT_START: if we are still trying to find a result.
1228 int res_iteration_finished;
1234 * Process results for zone iteration from database
1236 * @param cls struct ZoneIterationProcResult *proc
1237 * @param zone_key the zone key
1239 * @param rd_count number of records for this name
1240 * @param rd record data
1243 zone_iterate_proc (void *cls,
1244 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1246 unsigned int rd_count,
1247 const struct GNUNET_GNSRECORD_Data *rd)
1249 struct ZoneIterationProcResult *proc = cls;
1251 int do_refresh_block;
1253 if ((NULL == zone_key) && (NULL == name))
1255 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1256 "Iteration done\n");
1257 proc->res_iteration_finished = IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE;
1260 if ((NULL == zone_key) || (NULL == name))
1262 /* what is this!? should never happen */
1263 proc->res_iteration_finished = IT_START;
1267 proc->res_iteration_finished = IT_SUCCESS_MORE_AVAILABLE;
1268 send_lookup_response (snc,
1269 proc->zi->client->client,
1270 proc->zi->request_id,
1275 do_refresh_block = GNUNET_NO;
1276 for (i=0;i<rd_count;i++)
1277 if( (0 != (rd[i].flags & GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION)) &&
1278 (0 == (rd[i].flags & GNUNET_GNSRECORD_RF_PENDING)) )
1280 do_refresh_block = GNUNET_YES;
1283 if (GNUNET_YES == do_refresh_block)
1284 refresh_block (NULL, 0,
1294 * Perform the next round of the zone iteration.
1296 * @param zi zone iterator to process
1299 run_zone_iteration_round (struct ZoneIteration *zi)
1301 struct ZoneIterationProcResult proc;
1302 struct RecordResultMessage rrm;
1305 memset (&proc, 0, sizeof (proc));
1307 proc.res_iteration_finished = IT_START;
1308 while (IT_START == proc.res_iteration_finished)
1310 if (GNUNET_SYSERR ==
1311 (ret = GSN_database->iterate_records (GSN_database->cls,
1312 (0 == memcmp (&zi->zone, &zero, sizeof (zero)))
1316 &zone_iterate_proc, &proc)))
1321 if (GNUNET_NO == ret)
1322 proc.res_iteration_finished = IT_SUCCESS_NOT_MORE_RESULTS_AVAILABLE;
1325 if (IT_SUCCESS_MORE_AVAILABLE == proc.res_iteration_finished)
1327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1328 "More results available\n");
1329 return; /* more results later */
1331 /* send empty response to indicate end of list */
1332 memset (&rrm, 0, sizeof (rrm));
1333 rrm.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_RESULT);
1334 rrm.gns_header.header.size = htons (sizeof (rrm));
1335 rrm.gns_header.r_id = htonl (zi->request_id);
1336 GNUNET_SERVER_notification_context_unicast (snc,
1338 &rrm.gns_header.header,
1340 GNUNET_CONTAINER_DLL_remove (zi->client->op_head,
1341 zi->client->op_tail,
1348 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START message
1351 * @param client the client sending the message
1352 * @param message message of type 'struct ZoneIterationStartMessage'
1355 handle_iteration_start (void *cls,
1356 struct GNUNET_SERVER_Client *client,
1357 const struct GNUNET_MessageHeader *message)
1359 const struct ZoneIterationStartMessage *zis_msg;
1360 struct NamestoreClient *nc;
1361 struct ZoneIteration *zi;
1363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ZONE_ITERATION_START");
1364 if (NULL == (nc = client_lookup (client)))
1367 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1370 zis_msg = (const struct ZoneIterationStartMessage *) message;
1371 zi = GNUNET_new (struct ZoneIteration);
1372 zi->request_id = ntohl (zis_msg->gns_header.r_id);
1375 zi->zone = zis_msg->zone;
1378 GNUNET_CONTAINER_DLL_insert (nc->op_head, nc->op_tail, zi);
1379 run_zone_iteration_round (zi);
1380 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1385 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP message
1388 * @param client GNUNET_SERVER_Client sending the message
1389 * @param message message of type 'struct ZoneIterationStopMessage'
1392 handle_iteration_stop (void *cls,
1393 struct GNUNET_SERVER_Client *client,
1394 const struct GNUNET_MessageHeader *message)
1396 struct NamestoreClient *nc;
1397 struct ZoneIteration *zi;
1398 const struct ZoneIterationStopMessage *zis_msg;
1401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1402 "Received `%s' message\n",
1403 "ZONE_ITERATION_STOP");
1404 if (NULL == (nc = client_lookup(client)))
1407 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1410 zis_msg = (const struct ZoneIterationStopMessage *) message;
1411 rid = ntohl (zis_msg->gns_header.r_id);
1412 for (zi = nc->op_head; NULL != zi; zi = zi->next)
1413 if (zi->request_id == rid)
1418 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1421 GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, zi);
1423 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1428 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT message
1431 * @param client GNUNET_SERVER_Client sending the message
1432 * @param message message of type 'struct ZoneIterationNextMessage'
1435 handle_iteration_next (void *cls,
1436 struct GNUNET_SERVER_Client *client,
1437 const struct GNUNET_MessageHeader *message)
1439 struct NamestoreClient *nc;
1440 struct ZoneIteration *zi;
1441 const struct ZoneIterationNextMessage *zis_msg;
1444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1445 "Received `%s' message\n",
1446 "ZONE_ITERATION_NEXT");
1447 if (NULL == (nc = client_lookup(client)))
1450 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1453 zis_msg = (const struct ZoneIterationNextMessage *) message;
1454 rid = ntohl (zis_msg->gns_header.r_id);
1455 for (zi = nc->op_head; NULL != zi; zi = zi->next)
1456 if (zi->request_id == rid)
1461 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1464 run_zone_iteration_round (zi);
1465 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1470 * Send 'sync' message to zone monitor, we're now in sync.
1472 * @param zm monitor that is now in sync
1475 monitor_sync (struct ZoneMonitor *zm)
1477 struct GNUNET_MessageHeader sync;
1479 sync.size = htons (sizeof (struct GNUNET_MessageHeader));
1480 sync.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_SYNC);
1481 GNUNET_SERVER_notification_context_unicast (monitor_nc,
1489 * Obtain the next datum during the zone monitor's zone intiial iteration.
1491 * @param cls zone monitor that does its initial iteration
1492 * @param tc scheduler context
1495 monitor_next (void *cls,
1496 const struct GNUNET_SCHEDULER_TaskContext *tc);
1500 * A #GNUNET_NAMESTORE_RecordIterator for monitors.
1502 * @param cls a 'struct ZoneMonitor *' with information about the monitor
1503 * @param zone_key zone key of the zone
1505 * @param rd_count number of records in @a rd
1506 * @param rd array of records
1509 monitor_iterate_cb (void *cls,
1510 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1512 unsigned int rd_count,
1513 const struct GNUNET_GNSRECORD_Data *rd)
1515 struct ZoneMonitor *zm = cls;
1519 /* finished with iteration */
1523 send_lookup_response (monitor_nc,
1530 zm->task = GNUNET_SCHEDULER_add_now (&monitor_next, zm);
1535 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_START message
1538 * @param client the client sending the message
1539 * @param message message of type 'struct ZoneMonitorStartMessage'
1542 handle_monitor_start (void *cls,
1543 struct GNUNET_SERVER_Client *client,
1544 const struct GNUNET_MessageHeader *message)
1546 const struct ZoneMonitorStartMessage *zis_msg;
1547 struct ZoneMonitor *zm;
1549 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1550 "Received `%s' message\n",
1551 "ZONE_MONITOR_START");
1552 zis_msg = (const struct ZoneMonitorStartMessage *) message;
1553 zm = GNUNET_new (struct ZoneMonitor);
1555 zm->nc = client_lookup (client);
1556 zm->zone = zis_msg->zone;
1557 GNUNET_CONTAINER_DLL_insert (monitor_head, monitor_tail, zm);
1558 GNUNET_SERVER_client_mark_monitor (client);
1559 GNUNET_SERVER_disable_receive_done_warning (client);
1560 GNUNET_SERVER_notification_context_add (monitor_nc,
1562 if (GNUNET_YES == ntohl (zis_msg->iterate_first))
1563 zm->task = GNUNET_SCHEDULER_add_now (&monitor_next, zm);
1570 * Obtain the next datum during the zone monitor's zone intiial iteration.
1572 * @param cls zone monitor that does its initial iteration
1573 * @param tc scheduler context
1576 monitor_next (void *cls,
1577 const struct GNUNET_SCHEDULER_TaskContext *tc)
1579 struct ZoneMonitor *zm = cls;
1582 zm->task = GNUNET_SCHEDULER_NO_TASK;
1583 ret = GSN_database->iterate_records (GSN_database->cls,
1584 (0 == memcmp (&zm->zone, &zero, sizeof (zero)))
1588 &monitor_iterate_cb, zm);
1589 if (GNUNET_SYSERR == ret)
1591 GNUNET_SERVER_client_disconnect (zm->nc->client);
1594 if (GNUNET_NO == ret)
1604 * Process namestore requests.
1606 * @param cls closure
1607 * @param server the initialized server
1608 * @param cfg configuration to use
1611 run (void *cls, struct GNUNET_SERVER_Handle *server,
1612 const struct GNUNET_CONFIGURATION_Handle *cfg)
1614 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1615 {&handle_record_store, NULL,
1616 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE, 0},
1617 {&handle_record_lookup, NULL,
1618 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP, 0},
1619 {&handle_zone_to_name, NULL,
1620 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME, sizeof (struct ZoneToNameMessage) },
1621 {&handle_iteration_start, NULL,
1622 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START, sizeof (struct ZoneIterationStartMessage) },
1623 {&handle_iteration_next, NULL,
1624 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT, sizeof (struct ZoneIterationNextMessage) },
1625 {&handle_iteration_stop, NULL,
1626 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP, sizeof (struct ZoneIterationStopMessage) },
1627 {&handle_monitor_start, NULL,
1628 GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_START, sizeof (struct ZoneMonitorStartMessage) },
1633 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting namestore service\n");
1635 monitor_nc = GNUNET_SERVER_notification_context_create (server, 1);
1636 namecache = GNUNET_NAMECACHE_connect (cfg);
1637 /* Loading database plugin */
1639 GNUNET_CONFIGURATION_get_value_string (cfg, "namestore", "database",
1641 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "No database backend configured\n");
1643 GNUNET_asprintf (&db_lib_name, "libgnunet_plugin_namestore_%s", database);
1644 GSN_database = GNUNET_PLUGIN_load (db_lib_name, (void *) GSN_cfg);
1645 GNUNET_free (database);
1646 if (NULL == GSN_database)
1648 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1649 "Could not load database backend `%s'\n",
1651 GNUNET_SCHEDULER_add_now (&cleanup_task, NULL);
1655 /* Configuring server handles */
1656 GNUNET_SERVER_add_handlers (server, handlers);
1657 snc = GNUNET_SERVER_notification_context_create (server, 16);
1658 GNUNET_SERVER_disconnect_notify (server,
1659 &client_disconnect_notification,
1661 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &cleanup_task,
1667 * The main function for the template service.
1669 * @param argc number of arguments from the command line
1670 * @param argv command line arguments
1671 * @return 0 ok, 1 on error
1674 main (int argc, char *const *argv)
1676 return (GNUNET_OK ==
1677 GNUNET_SERVICE_run (argc, argv, "namestore",
1678 GNUNET_SERVICE_OPTION_NONE, &run, NULL)) ? 0 : 1;
1681 /* end of gnunet-service-namestore.c */