2 This file is part of GNUnet.
3 Copyright (C) 2012, 2013, 2014, 2018 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your 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 Affero General Public License for more details.
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
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_statistics_service.h"
35 #include "gnunet_signatures.h"
36 #include "namestore.h"
38 #define LOG_STRERROR_FILE(kind, syscall, filename) \
39 GNUNET_log_from_strerror_file (kind, "util", syscall, filename)
42 * If a monitor takes more than 1 minute to process an event, print a warning.
44 #define MONITOR_STALL_WARN_DELAY GNUNET_TIME_UNIT_MINUTES
47 * Size of the cache used by #get_nick_record()
54 struct NamestoreClient;
58 * A namestore iteration operation.
63 * Next element in the DLL
65 struct ZoneIteration *next;
68 * Previous element in the DLL
70 struct ZoneIteration *prev;
73 * Namestore client which intiated this zone iteration
75 struct NamestoreClient *nc;
78 * The nick to add to the records
80 struct GNUNET_GNSRECORD_Data *nick;
83 * Key of the zone we are iterating over.
85 struct GNUNET_CRYPTO_EcdsaPrivateKey zone;
88 * Last sequence number in the zone iteration used to address next
89 * result of the zone iteration in the store
92 * Updated in #zone_iterate_proc()
97 * The operation id fot the zone iteration in the response for the client
102 * Offset of the zone iteration used to address next result of the zone
103 * iteration in the store
105 * Initialy set to 0 in #handle_iteration_start
106 * Incremented with by every call to #handle_iteration_next
111 * Number of pending cache operations triggered by this zone iteration which we
112 * need to wait for before allowing the client to continue.
114 unsigned int cache_ops;
117 * Set to #GNUNET_YES if the last iteration exhausted the limit set by the
118 * client and we should send the #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_RESULT_END
119 * message and free the data structure once @e cache_ops is zero.
128 struct NamestoreClient
133 struct GNUNET_SERVICE_Client *client;
136 * Message queue for transmission to @e client
138 struct GNUNET_MQ_Handle *mq;
142 * Zone iteration operations in progress initiated by this client
144 struct ZoneIteration *op_head;
148 * Zone iteration operations in progress initiated by this client
150 struct ZoneIteration *op_tail;
155 * A namestore monitor.
160 * Next element in the DLL
162 struct ZoneMonitor *next;
165 * Previous element in the DLL
167 struct ZoneMonitor *prev;
170 * Namestore client which intiated this zone monitor
172 struct NamestoreClient *nc;
175 * Private key of the zone.
177 struct GNUNET_CRYPTO_EcdsaPrivateKey zone;
180 * Task active during initial iteration.
182 struct GNUNET_SCHEDULER_Task *task;
185 * Task to warn about slow monitors.
187 struct GNUNET_SCHEDULER_Task *sa_wait_warning;
190 * Since when are we blocked on this monitor?
192 struct GNUNET_TIME_Absolute sa_waiting_start;
195 * Last sequence number in the zone iteration used to address next
196 * result of the zone iteration in the store
199 * Updated in #monitor_iterate_cb()
204 * Current limit of how many more messages we are allowed
205 * to queue to this monitor.
210 * How many more requests may we receive from the iterator
211 * before it is at the limit we gave it? Will be below or
212 * equal to @e limit. The effective limit for monitor
213 * events is thus @e iteration_cnt - @e limit!
215 uint64_t iteration_cnt;
218 * Are we (still) in the initial iteration pass?
220 int in_first_iteration;
223 * Is there a store activity waiting for this monitor? We only raise the
224 * flag when it happens and search the DLL for the store activity when we
225 * had a limit increase. If we cannot find any waiting store activity at
226 * that time, we clear the flag again.
233 * Pending operation on the namecache.
235 struct CacheOperation
240 struct CacheOperation *prev;
245 struct CacheOperation *next;
248 * Handle to namecache queue.
250 struct GNUNET_NAMECACHE_QueueEntry *qe;
253 * Client to notify about the result, can be NULL.
255 struct NamestoreClient *nc;
258 * Zone iteration to call #zone_iteration_done_client_continue()
259 * for if applicable, can be NULL.
261 struct ZoneIteration *zi;
264 * Client's request ID.
271 * Information for an ongoing #handle_record_store() operation.
272 * Needed as we may wait for monitors to be ready for the notification.
279 struct StoreActivity *next;
284 struct StoreActivity *prev;
287 * Which client triggered the store activity?
289 struct NamestoreClient *nc;
292 * Copy of the original store message (as data fields in @e rd will
295 const struct RecordStoreMessage *rsm;
298 * Next zone monitor that still needs to be notified about this PUT.
300 struct ZoneMonitor *zm_pos;
303 * Label nicely canonicalized (lower case).
310 * Entry in list of cached nick resolutions.
315 * Zone the cache entry is for.
317 struct GNUNET_CRYPTO_EcdsaPrivateKey zone;
320 * Cached record data.
322 struct GNUNET_GNSRECORD_Data *rd;
325 * Timestamp when this cache entry was used last.
327 struct GNUNET_TIME_Absolute last_used;
332 * We cache nick records to reduce DB load.
334 static struct NickCache nick_cache[NC_SIZE];
337 * Public key of all zeros.
339 static const struct GNUNET_CRYPTO_EcdsaPrivateKey zero;
342 * Configuration handle.
344 static const struct GNUNET_CONFIGURATION_Handle *GSN_cfg;
347 * Handle to the statistics service
349 static struct GNUNET_STATISTICS_Handle *statistics;
354 static struct GNUNET_NAMECACHE_Handle *namecache;
359 static struct GNUNET_NAMESTORE_PluginFunctions *GSN_database;
362 * Name of the database plugin
364 static char *db_lib_name;
369 static struct CacheOperation *cop_head;
374 static struct CacheOperation *cop_tail;
377 * First active zone monitor.
379 static struct ZoneMonitor *monitor_head;
382 * Last active zone monitor.
384 static struct ZoneMonitor *monitor_tail;
387 * Head of DLL of monitor-blocked store activities.
389 static struct StoreActivity *sa_head;
392 * Tail of DLL of monitor-blocked store activities.
394 static struct StoreActivity *sa_tail;
397 * Notification context shared by all monitors.
399 static struct GNUNET_NotificationContext *monitor_nc;
402 * Optimize block insertion by caching map of private keys to
403 * public keys in memory?
405 static int cache_keys;
408 * Use the namecache? Doing so creates additional cryptographic
409 * operations whenever we touch a record.
411 static int disable_namecache;
415 * Task run during shutdown.
420 cleanup_task (void *cls)
422 struct CacheOperation *cop;
425 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Stopping namestore service\n");
426 while (NULL != (cop = cop_head))
428 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
429 "Aborting incomplete namecache operation\n");
430 GNUNET_NAMECACHE_cancel (cop->qe);
431 GNUNET_CONTAINER_DLL_remove (cop_head, cop_tail, cop);
434 if (NULL != namecache)
436 GNUNET_NAMECACHE_disconnect (namecache);
439 GNUNET_break (NULL == GNUNET_PLUGIN_unload (db_lib_name, GSN_database));
440 GNUNET_free (db_lib_name);
442 if (NULL != monitor_nc)
444 GNUNET_notification_context_destroy (monitor_nc);
447 if (NULL != statistics)
449 GNUNET_STATISTICS_destroy (statistics, GNUNET_NO);
456 * Release memory used by @a sa.
458 * @param sa activity to free
461 free_store_activity (struct StoreActivity *sa)
463 GNUNET_CONTAINER_DLL_remove (sa_head, sa_tail, sa);
464 GNUNET_free (sa->conv_name);
470 * Function called with the records for the #GNUNET_GNS_EMPTY_LABEL_AT
471 * label in the zone. Used to locate the #GNUNET_GNSRECORD_TYPE_NICK
472 * record, which (if found) is then copied to @a cls for future use.
474 * @param cls a `struct GNUNET_GNSRECORD_Data **` for storing the nick (if found)
475 * @param seq sequence number of the record, MUST NOT BE ZERO
476 * @param private_key the private key of the zone (unused)
477 * @param label should be #GNUNET_GNS_EMPTY_LABEL_AT
478 * @param rd_count number of records in @a rd
479 * @param rd records stored under @a label in the zone
482 lookup_nick_it (void *cls,
484 const struct GNUNET_CRYPTO_EcdsaPrivateKey *private_key,
486 unsigned int rd_count,
487 const struct GNUNET_GNSRECORD_Data *rd)
489 struct GNUNET_GNSRECORD_Data **res = cls;
492 GNUNET_assert (0 != seq);
493 if (0 != strcmp (label, GNUNET_GNS_EMPTY_LABEL_AT))
498 for (unsigned int c = 0; c < rd_count; c++)
500 if (GNUNET_GNSRECORD_TYPE_NICK == rd[c].record_type)
503 GNUNET_malloc (rd[c].data_size + sizeof(struct GNUNET_GNSRECORD_Data));
504 (*res)->data = &(*res)[1];
505 GNUNET_memcpy ((void *) (*res)->data, rd[c].data, rd[c].data_size);
506 (*res)->data_size = rd[c].data_size;
507 (*res)->expiration_time = rd[c].expiration_time;
508 (*res)->flags = rd[c].flags;
509 (*res)->record_type = GNUNET_GNSRECORD_TYPE_NICK;
518 * Add entry to the cache for @a zone and @a nick
520 * @param zone zone key to cache under
521 * @param nick nick entry to cache
524 cache_nick (const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
525 const struct GNUNET_GNSRECORD_Data *nick)
527 struct NickCache *oldest;
530 for (unsigned int i = 0; i < NC_SIZE; i++)
532 struct NickCache *pos = &nick_cache[i];
534 if ((NULL == oldest) ||
535 (oldest->last_used.abs_value_us > pos->last_used.abs_value_us))
537 if (0 == GNUNET_memcmp (zone, &pos->zone))
543 GNUNET_free_non_null (oldest->rd);
544 oldest->zone = *zone;
547 oldest->rd = GNUNET_malloc (sizeof(*nick) + nick->data_size);
549 oldest->rd->data = &oldest->rd[1];
550 memcpy (&oldest->rd[1], nick->data, nick->data_size);
556 oldest->last_used = GNUNET_TIME_absolute_get ();
561 * Return the NICK record for the zone (if it exists).
563 * @param zone private key for the zone to look for nick
564 * @return NULL if no NICK record was found
566 static struct GNUNET_GNSRECORD_Data *
567 get_nick_record (const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone)
569 struct GNUNET_CRYPTO_EcdsaPublicKey pub;
570 struct GNUNET_GNSRECORD_Data *nick;
573 /* check cache first */
574 for (unsigned int i = 0; i < NC_SIZE; i++)
576 struct NickCache *pos = &nick_cache[i];
577 if ((NULL != pos->rd) && (0 == GNUNET_memcmp (zone, &pos->zone)))
581 nick = GNUNET_malloc (sizeof(*nick) + pos->rd->data_size);
583 nick->data = &nick[1];
584 memcpy (&nick[1], pos->rd->data, pos->rd->data_size);
585 pos->last_used = GNUNET_TIME_absolute_get ();
591 res = GSN_database->lookup_records (GSN_database->cls,
593 GNUNET_GNS_EMPTY_LABEL_AT,
596 if ((GNUNET_OK != res) || (NULL == nick))
598 #if ! defined(GNUNET_CULL_LOGGING)
599 static int do_log = GNUNET_LOG_CALL_STATUS;
602 do_log = GNUNET_get_log_call_status (GNUNET_ERROR_TYPE_DEBUG,
609 GNUNET_CRYPTO_ecdsa_key_get_public (zone, &pub);
610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
611 "No nick name set for zone `%s'\n",
612 GNUNET_GNSRECORD_z2s (&pub));
616 cache_nick (zone, NULL);
621 cache_nick (zone, nick);
627 * Merge the nick record @a nick_rd with the rest of the
628 * record set given in @a rd2. Store the result in @a rdc_res
629 * and @a rd_res. The @a nick_rd's expiration time is set to
630 * the maximum expiration time of all of the records in @a rd2.
632 * @param nick_rd the nick record to integrate
633 * @param rd2_length length of the @a rd2 array
634 * @param rd2 array of records
635 * @param rdc_res[out] length of the resulting @a rd_res array
636 * @param rd_res[out] set to an array of records,
637 * including @a nick_rd and @a rd2;
638 * all of the variable-size 'data' fields in @a rd2 are
639 * allocated in the same chunk of memory!
642 merge_with_nick_records (const struct GNUNET_GNSRECORD_Data *nick_rd,
643 unsigned int rd2_length,
644 const struct GNUNET_GNSRECORD_Data *rd2,
645 unsigned int *rdc_res,
646 struct GNUNET_GNSRECORD_Data **rd_res)
648 uint64_t latest_expiration;
652 struct GNUNET_GNSRECORD_Data *target;
654 (*rdc_res) = 1 + rd2_length;
655 if (0 == 1 + rd2_length)
661 req = sizeof(struct GNUNET_GNSRECORD_Data) + nick_rd->data_size;
662 for (unsigned int i = 0; i < rd2_length; i++)
664 const struct GNUNET_GNSRECORD_Data *orig = &rd2[i];
666 if (req + sizeof(struct GNUNET_GNSRECORD_Data) + orig->data_size < req)
672 req += sizeof(struct GNUNET_GNSRECORD_Data) + orig->data_size;
674 target = GNUNET_malloc (req);
676 data = (char *) &target[1 + rd2_length];
678 latest_expiration = 0;
679 for (unsigned int i = 0; i < rd2_length; i++)
681 const struct GNUNET_GNSRECORD_Data *orig = &rd2[i];
683 if (0 != (orig->flags & GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION))
685 if ((GNUNET_TIME_absolute_get ().abs_value_us + orig->expiration_time) >
687 latest_expiration = orig->expiration_time;
689 else if (orig->expiration_time > latest_expiration)
690 latest_expiration = orig->expiration_time;
692 target[i].data = (void *) &data[data_offset];
693 GNUNET_memcpy (&data[data_offset], orig->data, orig->data_size);
694 data_offset += orig->data_size;
697 target[rd2_length] = *nick_rd;
698 target[rd2_length].expiration_time = latest_expiration;
699 target[rd2_length].data = (void *) &data[data_offset];
700 GNUNET_memcpy (&data[data_offset], nick_rd->data, nick_rd->data_size);
701 data_offset += nick_rd->data_size;
702 GNUNET_assert (req == (sizeof(struct GNUNET_GNSRECORD_Data)) * (*rdc_res)
708 * Generate a `struct LookupNameResponseMessage` and send it to the
709 * given client using the given notification context.
711 * @param nc client to unicast to
712 * @param request_id request ID to use
713 * @param zone_key zone key of the zone
715 * @param rd_count number of records in @a rd
716 * @param rd array of records
719 send_lookup_response (struct NamestoreClient *nc,
721 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
723 unsigned int rd_count,
724 const struct GNUNET_GNSRECORD_Data *rd)
726 struct GNUNET_MQ_Envelope *env;
727 struct RecordResultMessage *zir_msg;
728 struct GNUNET_GNSRECORD_Data *nick;
729 struct GNUNET_GNSRECORD_Data *res;
730 unsigned int res_count;
736 nick = get_nick_record (zone_key);
737 GNUNET_assert (-1 != GNUNET_GNSRECORD_records_get_size (rd_count, rd));
739 if ((NULL != nick) && (0 != strcmp (name, GNUNET_GNS_EMPTY_LABEL_AT)))
742 (nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
743 merge_with_nick_records (nick, rd_count, rd, &res_count, &res);
748 res_count = rd_count;
749 res = (struct GNUNET_GNSRECORD_Data *) rd;
752 GNUNET_assert (-1 != GNUNET_GNSRECORD_records_get_size (res_count, res));
755 name_len = strlen (name) + 1;
756 rd_ser_len = GNUNET_GNSRECORD_records_get_size (res_count, res);
760 GNUNET_SERVICE_client_drop (nc->client);
763 if (((size_t) rd_ser_len) >= UINT16_MAX - name_len - sizeof(*zir_msg))
766 GNUNET_SERVICE_client_drop (nc->client);
769 env = GNUNET_MQ_msg_extra (zir_msg,
770 name_len + rd_ser_len,
771 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_RESULT);
772 zir_msg->gns_header.r_id = htonl (request_id);
773 zir_msg->name_len = htons (name_len);
774 zir_msg->rd_count = htons (res_count);
775 zir_msg->rd_len = htons ((uint16_t) rd_ser_len);
776 zir_msg->private_key = *zone_key;
777 name_tmp = (char *) &zir_msg[1];
778 GNUNET_memcpy (name_tmp, name, name_len);
779 rd_ser = &name_tmp[name_len];
782 GNUNET_GNSRECORD_records_serialize (res_count, res, rd_ser_len, rd_ser));
783 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
784 "Sending RECORD_RESULT message with %u records\n",
786 GNUNET_STATISTICS_update (statistics,
787 "Record sets sent to clients",
790 GNUNET_MQ_send (nc->mq, env);
797 * Send response to the store request to the client.
799 * @param client client to talk to
800 * @param res status of the operation
801 * @param rid client's request ID
804 send_store_response (struct NamestoreClient *nc, int res, uint32_t rid)
806 struct GNUNET_MQ_Envelope *env;
807 struct RecordStoreResponseMessage *rcr_msg;
809 GNUNET_assert (NULL != nc);
810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
811 "Sending RECORD_STORE_RESPONSE message\n");
812 GNUNET_STATISTICS_update (statistics,
813 "Store requests completed",
816 env = GNUNET_MQ_msg (rcr_msg,
817 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE_RESPONSE);
818 rcr_msg->gns_header.r_id = htonl (rid);
819 rcr_msg->op_result = htonl (res);
820 GNUNET_MQ_send (nc->mq, env);
825 * Function called once we are done with the zone iteration and
826 * allow the zone iteration client to send us more messages.
828 * @param zi zone iteration we are processing
831 zone_iteration_done_client_continue (struct ZoneIteration *zi)
833 struct GNUNET_MQ_Envelope *env;
834 struct GNUNET_NAMESTORE_Header *em;
836 GNUNET_SERVICE_client_continue (zi->nc->client);
839 /* send empty response to indicate end of list */
840 env = GNUNET_MQ_msg (em, GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_RESULT_END);
841 em->r_id = htonl (zi->request_id);
842 GNUNET_MQ_send (zi->nc->mq, env);
844 GNUNET_CONTAINER_DLL_remove (zi->nc->op_head, zi->nc->op_tail, zi);
850 * Cache operation complete, clean up.
852 * @param cls the `struct CacheOperation`
853 * @param success success
854 * @param emsg error messages
857 finish_cache_operation (void *cls, int32_t success, const char *emsg)
859 struct CacheOperation *cop = cls;
860 struct ZoneIteration *zi;
863 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
864 _ ("Failed to replicate block in namecache: %s\n"),
867 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CACHE operation completed\n");
868 GNUNET_CONTAINER_DLL_remove (cop_head, cop_tail, cop);
870 send_store_response (cop->nc, success, cop->rid);
871 if (NULL != (zi = cop->zi))
874 if (0 == zi->cache_ops)
876 /* unchoke zone iteration, cache has caught up */
877 zone_iteration_done_client_continue (zi);
885 * We just touched the plaintext information about a name in our zone;
886 * refresh the corresponding (encrypted) block in the namecache.
888 * @param nc client responsible for the request, can be NULL
889 * @param zi zone iteration response for the request, can be NULL
890 * @param rid request ID of the client
891 * @param zone_key private key of the zone
892 * @param name label for the records
893 * @param rd_count number of records
894 * @param rd records stored under the given @a name
897 refresh_block (struct NamestoreClient *nc,
898 struct ZoneIteration *zi,
900 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
902 unsigned int rd_count,
903 const struct GNUNET_GNSRECORD_Data *rd)
905 struct GNUNET_GNSRECORD_Block *block;
906 struct CacheOperation *cop;
907 struct GNUNET_CRYPTO_EcdsaPublicKey pkey;
908 struct GNUNET_GNSRECORD_Data *nick;
909 struct GNUNET_GNSRECORD_Data *res;
910 unsigned int res_count;
911 struct GNUNET_TIME_Absolute exp_time;
913 nick = get_nick_record (zone_key);
914 res_count = rd_count;
915 res = (struct GNUNET_GNSRECORD_Data *) rd; /* fixme: a bit unclean... */
919 (nick->flags | GNUNET_GNSRECORD_RF_PRIVATE) ^ GNUNET_GNSRECORD_RF_PRIVATE;
920 merge_with_nick_records (nick, rd_count, rd, &res_count, &res);
926 send_store_response (nc, GNUNET_OK, rid);
927 return; /* no data, no need to update cache */
929 if (GNUNET_YES == disable_namecache)
931 GNUNET_STATISTICS_update (statistics,
932 "Namecache updates skipped (NC disabled)",
936 send_store_response (nc, GNUNET_OK, rid);
939 exp_time = GNUNET_GNSRECORD_record_get_expiration_time (res_count, res);
942 GNUNET_GNSRECORD_block_create2 (zone_key, exp_time, name, res, res_count);
945 GNUNET_GNSRECORD_block_create (zone_key, exp_time, name, res, res_count);
946 GNUNET_assert (NULL != block);
947 GNUNET_CRYPTO_ecdsa_key_get_public (zone_key, &pkey);
949 GNUNET_ERROR_TYPE_DEBUG,
950 "Caching block for label `%s' with %u records and expiration %s in zone `%s' in namecache\n",
953 GNUNET_STRINGS_absolute_time_to_string (exp_time),
954 GNUNET_GNSRECORD_z2s (&pkey));
955 GNUNET_STATISTICS_update (statistics,
956 "Namecache updates pushed",
959 cop = GNUNET_new (struct CacheOperation);
965 GNUNET_CONTAINER_DLL_insert (cop_head, cop_tail, cop);
966 cop->qe = GNUNET_NAMECACHE_block_cache (namecache,
968 &finish_cache_operation,
975 * Print a warning that one of our monitors is no longer reacting.
977 * @param cls a `struct ZoneMonitor` to warn about
980 warn_monitor_slow (void *cls)
982 struct ZoneMonitor *zm = cls;
984 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
985 "No response from monitor since %s\n",
986 GNUNET_STRINGS_absolute_time_to_string (zm->sa_waiting_start));
987 zm->sa_wait_warning = GNUNET_SCHEDULER_add_delayed (MONITOR_STALL_WARN_DELAY,
994 * Continue processing the @a sa.
996 * @param sa store activity to process
999 continue_store_activity (struct StoreActivity *sa)
1001 const struct RecordStoreMessage *rp_msg = sa->rsm;
1002 unsigned int rd_count;
1006 const char *name_tmp;
1009 rid = ntohl (rp_msg->gns_header.r_id);
1010 name_len = ntohs (rp_msg->name_len);
1011 rd_count = ntohs (rp_msg->rd_count);
1012 rd_ser_len = ntohs (rp_msg->rd_len);
1013 name_tmp = (const char *) &rp_msg[1];
1014 rd_ser = &name_tmp[name_len];
1016 struct GNUNET_GNSRECORD_Data rd[GNUNET_NZL (rd_count)];
1018 /* We did this before, must succeed again */
1021 GNUNET_GNSRECORD_records_deserialize (rd_ser_len, rd_ser, rd_count, rd));
1023 for (struct ZoneMonitor *zm = sa->zm_pos; NULL != zm; zm = sa->zm_pos)
1025 if ((0 != GNUNET_memcmp (&rp_msg->private_key, &zm->zone)) &&
1026 (0 != GNUNET_memcmp (&zm->zone, &zero)))
1028 sa->zm_pos = zm->next; /* not interesting to this monitor */
1031 if (zm->limit == zm->iteration_cnt)
1033 zm->sa_waiting = GNUNET_YES;
1034 zm->sa_waiting_start = GNUNET_TIME_absolute_get ();
1035 if (NULL != zm->sa_wait_warning)
1036 GNUNET_SCHEDULER_cancel (zm->sa_wait_warning);
1037 zm->sa_wait_warning =
1038 GNUNET_SCHEDULER_add_delayed (MONITOR_STALL_WARN_DELAY,
1041 return; /* blocked on zone monitor */
1043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1044 "Notifying monitor about changes under label `%s'\n",
1047 send_lookup_response (zm->nc,
1049 &rp_msg->private_key,
1053 sa->zm_pos = zm->next;
1055 /* great, done with the monitors, unpack (again) for refresh_block operation */
1056 refresh_block (sa->nc,
1059 &rp_msg->private_key,
1064 GNUNET_SERVICE_client_continue (sa->nc->client);
1065 free_store_activity (sa);
1070 * Called whenever a client is disconnected.
1071 * Frees our resources associated with that client.
1073 * @param cls closure
1074 * @param client identification of the client
1075 * @param app_ctx the `struct NamestoreClient` of @a client
1078 client_disconnect_cb (void *cls,
1079 struct GNUNET_SERVICE_Client *client,
1082 struct NamestoreClient *nc = app_ctx;
1083 struct ZoneIteration *no;
1084 struct CacheOperation *cop;
1087 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %p disconnected\n", client);
1088 for (struct ZoneMonitor *zm = monitor_head; NULL != zm; zm = zm->next)
1090 struct StoreActivity *san;
1094 GNUNET_CONTAINER_DLL_remove (monitor_head, monitor_tail, zm);
1095 if (NULL != zm->task)
1097 GNUNET_SCHEDULER_cancel (zm->task);
1100 if (NULL != zm->sa_wait_warning)
1102 GNUNET_SCHEDULER_cancel (zm->sa_wait_warning);
1103 zm->sa_wait_warning = NULL;
1105 for (struct StoreActivity *sa = sa_head; NULL != sa; sa = san)
1108 if (zm == sa->zm_pos)
1110 sa->zm_pos = zm->next;
1111 /* this may free sa */
1112 continue_store_activity (sa);
1118 for (struct StoreActivity *sa = sa_head; NULL != sa; sa = sa->next)
1122 /* this may free sa */
1123 free_store_activity (sa);
1124 break; /* there can only be one per nc */
1127 while (NULL != (no = nc->op_head))
1129 GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, no);
1132 for (cop = cop_head; NULL != cop; cop = cop->next)
1140 * Add a client to our list of active clients.
1143 * @param client client to add
1144 * @param mq message queue for @a client
1145 * @return internal namestore client structure for this client
1148 client_connect_cb (void *cls,
1149 struct GNUNET_SERVICE_Client *client,
1150 struct GNUNET_MQ_Handle *mq)
1152 struct NamestoreClient *nc;
1155 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %p connected\n", client);
1156 nc = GNUNET_new (struct NamestoreClient);
1157 nc->client = client;
1164 * Closure for #lookup_it().
1166 struct RecordLookupContext
1181 struct GNUNET_GNSRECORD_Data *nick;
1191 unsigned int res_rd_count;
1201 * Function called by the namestore plugin when we are trying to lookup
1202 * a record as part of #handle_record_lookup(). Merges all results into
1205 * @param cls closure with a `struct RecordLookupContext`
1206 * @param seq unique serial number of the record, MUST NOT BE ZERO
1207 * @param zone_key private key of the zone
1208 * @param label name that is being mapped (at most 255 characters long)
1209 * @param rd_count number of entries in @a rd array
1210 * @param rd array of records with data to store
1213 lookup_it (void *cls,
1215 const struct GNUNET_CRYPTO_EcdsaPrivateKey *private_key,
1217 unsigned int rd_count,
1218 const struct GNUNET_GNSRECORD_Data *rd)
1220 struct RecordLookupContext *rlc = cls;
1223 GNUNET_assert (0 != seq);
1224 if (0 != strcmp (label, rlc->label))
1226 rlc->found = GNUNET_YES;
1229 rlc->rd_ser_len = 0;
1230 rlc->res_rd_count = 0;
1234 if ((NULL != rlc->nick) && (0 != strcmp (label, GNUNET_GNS_EMPTY_LABEL_AT)))
1237 struct GNUNET_GNSRECORD_Data *rd_res;
1238 unsigned int rdc_res;
1242 rlc->nick->flags = (rlc->nick->flags | GNUNET_GNSRECORD_RF_PRIVATE)
1243 ^ GNUNET_GNSRECORD_RF_PRIVATE;
1244 merge_with_nick_records (rlc->nick, rd_count, rd, &rdc_res, &rd_res);
1245 rlc->rd_ser_len = GNUNET_GNSRECORD_records_get_size (rdc_res, rd_res);
1246 if (rlc->rd_ser_len < 0)
1249 GNUNET_free (rd_res);
1250 rlc->found = GNUNET_NO;
1251 rlc->rd_ser_len = 0;
1254 rlc->res_rd_count = rdc_res;
1255 rlc->res_rd = GNUNET_malloc (rlc->rd_ser_len);
1256 if (rlc->rd_ser_len != GNUNET_GNSRECORD_records_serialize (rdc_res,
1262 GNUNET_free (rlc->res_rd);
1264 rlc->res_rd_count = 0;
1265 rlc->rd_ser_len = 0;
1266 GNUNET_free (rd_res);
1267 rlc->found = GNUNET_NO;
1270 GNUNET_free (rd_res);
1271 GNUNET_free (rlc->nick);
1276 rlc->rd_ser_len = GNUNET_GNSRECORD_records_get_size (rd_count, rd);
1277 if (rlc->rd_ser_len < 0)
1280 rlc->found = GNUNET_NO;
1281 rlc->rd_ser_len = 0;
1284 rlc->res_rd_count = rd_count;
1285 rlc->res_rd = GNUNET_malloc (rlc->rd_ser_len);
1286 if (rlc->rd_ser_len != GNUNET_GNSRECORD_records_serialize (rd_count,
1292 GNUNET_free (rlc->res_rd);
1294 rlc->res_rd_count = 0;
1295 rlc->rd_ser_len = 0;
1296 rlc->found = GNUNET_NO;
1304 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP message
1306 * @param cls client sending the message
1307 * @param ll_msg message of type `struct LabelLookupMessage`
1308 * @return #GNUNET_OK if @a ll_msg is well-formed
1311 check_record_lookup (void *cls, const struct LabelLookupMessage *ll_msg)
1317 name_len = ntohl (ll_msg->label_len);
1318 src_size = ntohs (ll_msg->gns_header.header.size);
1319 if (name_len != src_size - sizeof(struct LabelLookupMessage))
1322 return GNUNET_SYSERR;
1324 GNUNET_MQ_check_zero_termination (ll_msg);
1330 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP message
1332 * @param cls client sending the message
1333 * @param ll_msg message of type `struct LabelLookupMessage`
1336 handle_record_lookup (void *cls, const struct LabelLookupMessage *ll_msg)
1338 struct NamestoreClient *nc = cls;
1339 struct GNUNET_MQ_Envelope *env;
1340 struct LabelLookupResponseMessage *llr_msg;
1341 struct RecordLookupContext rlc;
1342 const char *name_tmp;
1348 name_len = ntohl (ll_msg->label_len);
1349 name_tmp = (const char *) &ll_msg[1];
1350 GNUNET_SERVICE_client_continue (nc->client);
1351 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1352 "Received NAMESTORE_RECORD_LOOKUP message for name `%s'\n",
1355 conv_name = GNUNET_GNSRECORD_string_to_lowercase (name_tmp);
1356 if (NULL == conv_name)
1358 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1359 "Error converting name `%s'\n",
1361 GNUNET_SERVICE_client_drop (nc->client);
1364 rlc.label = conv_name;
1365 rlc.found = GNUNET_NO;
1366 rlc.res_rd_count = 0;
1369 rlc.nick = get_nick_record (&ll_msg->zone);
1370 res = GSN_database->lookup_records (GSN_database->cls,
1375 GNUNET_free (conv_name);
1377 GNUNET_MQ_msg_extra (llr_msg,
1378 name_len + rlc.rd_ser_len,
1379 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP_RESPONSE);
1380 llr_msg->gns_header.r_id = ll_msg->gns_header.r_id;
1381 llr_msg->private_key = ll_msg->zone;
1382 llr_msg->name_len = htons (name_len);
1383 llr_msg->rd_count = htons (rlc.res_rd_count);
1384 llr_msg->rd_len = htons (rlc.rd_ser_len);
1385 res_name = (char *) &llr_msg[1];
1386 if ((GNUNET_YES == rlc.found) && (GNUNET_OK == res))
1387 llr_msg->found = ntohs (GNUNET_YES);
1389 llr_msg->found = ntohs (GNUNET_NO);
1390 GNUNET_memcpy (&llr_msg[1], name_tmp, name_len);
1391 GNUNET_memcpy (&res_name[name_len], rlc.res_rd, rlc.rd_ser_len);
1392 GNUNET_MQ_send (nc->mq, env);
1393 GNUNET_free_non_null (rlc.res_rd);
1398 * Checks a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE message
1400 * @param cls client sending the message
1401 * @param rp_msg message of type `struct RecordStoreMessage`
1402 * @return #GNUNET_OK if @a rp_msg is well-formed
1405 check_record_store (void *cls, const struct RecordStoreMessage *rp_msg)
1409 size_t msg_size_exp;
1411 const char *name_tmp;
1414 name_len = ntohs (rp_msg->name_len);
1415 msg_size = ntohs (rp_msg->gns_header.header.size);
1416 rd_ser_len = ntohs (rp_msg->rd_len);
1417 msg_size_exp = sizeof(struct RecordStoreMessage) + name_len + rd_ser_len;
1418 if (msg_size != msg_size_exp)
1421 return GNUNET_SYSERR;
1423 if ((0 == name_len) || (name_len > MAX_NAME_LEN))
1426 return GNUNET_SYSERR;
1428 name_tmp = (const char *) &rp_msg[1];
1429 if ('\0' != name_tmp[name_len - 1])
1432 return GNUNET_SYSERR;
1439 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE message
1441 * @param cls client sending the message
1442 * @param rp_msg message of type `struct RecordStoreMessage`
1445 handle_record_store (void *cls, const struct RecordStoreMessage *rp_msg)
1447 struct NamestoreClient *nc = cls;
1451 const char *name_tmp;
1454 unsigned int rd_count;
1456 struct StoreActivity *sa;
1458 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1459 "Received NAMESTORE_RECORD_STORE message\n");
1460 rid = ntohl (rp_msg->gns_header.r_id);
1461 name_len = ntohs (rp_msg->name_len);
1462 rd_count = ntohs (rp_msg->rd_count);
1463 rd_ser_len = ntohs (rp_msg->rd_len);
1464 GNUNET_break (0 == ntohs (rp_msg->reserved));
1465 name_tmp = (const char *) &rp_msg[1];
1466 rd_ser = &name_tmp[name_len];
1468 struct GNUNET_GNSRECORD_Data rd[GNUNET_NZL (rd_count)];
1471 GNUNET_GNSRECORD_records_deserialize (rd_ser_len, rd_ser, rd_count, rd))
1474 GNUNET_SERVICE_client_drop (nc->client);
1478 /* Extracting and converting private key */
1479 conv_name = GNUNET_GNSRECORD_string_to_lowercase (name_tmp);
1480 if (NULL == conv_name)
1482 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1483 "Error converting name `%s'\n",
1485 GNUNET_SERVICE_client_drop (nc->client);
1488 GNUNET_STATISTICS_update (statistics,
1489 "Well-formed store requests received",
1492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1493 "Creating %u records for name `%s'\n",
1494 (unsigned int) rd_count,
1496 if ((0 == rd_count) &&
1497 (GNUNET_NO == GSN_database->lookup_records (GSN_database->cls,
1498 &rp_msg->private_key,
1503 /* This name does not exist, so cannot be removed */
1504 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1505 "Name `%s' does not exist, no deletion required\n",
1511 /* remove "NICK" records, unless this is for the
1512 #GNUNET_GNS_EMPTY_LABEL_AT label */
1513 struct GNUNET_GNSRECORD_Data rd_clean[GNUNET_NZL (rd_count)];
1514 unsigned int rd_clean_off;
1518 have_nick = GNUNET_NO;
1519 for (unsigned int i = 0; i < rd_count; i++)
1521 rd_clean[rd_clean_off] = rd[i];
1522 if ((0 == strcmp (GNUNET_GNS_EMPTY_LABEL_AT, conv_name)) ||
1523 (GNUNET_GNSRECORD_TYPE_NICK != rd[i].record_type))
1526 if ((0 == strcmp (GNUNET_GNS_EMPTY_LABEL_AT, conv_name)) &&
1527 (GNUNET_GNSRECORD_TYPE_NICK == rd[i].record_type))
1529 cache_nick (&rp_msg->private_key, &rd[i]);
1530 have_nick = GNUNET_YES;
1533 if ((0 == strcmp (GNUNET_GNS_EMPTY_LABEL_AT, conv_name)) &&
1534 (GNUNET_NO == have_nick))
1536 /* remove nick record from cache, in case we have one there */
1537 cache_nick (&rp_msg->private_key, NULL);
1539 res = GSN_database->store_records (GSN_database->cls,
1540 &rp_msg->private_key,
1546 if (GNUNET_OK != res)
1548 /* store not successful, not need to tell monitors */
1549 send_store_response (nc, res, rid);
1550 GNUNET_SERVICE_client_continue (nc->client);
1551 GNUNET_free (conv_name);
1555 sa = GNUNET_malloc (sizeof(struct StoreActivity)
1556 + ntohs (rp_msg->gns_header.header.size));
1557 GNUNET_CONTAINER_DLL_insert (sa_head, sa_tail, sa);
1559 sa->rsm = (const struct RecordStoreMessage *) &sa[1];
1560 GNUNET_memcpy (&sa[1], rp_msg, ntohs (rp_msg->gns_header.header.size));
1561 sa->zm_pos = monitor_head;
1562 sa->conv_name = conv_name;
1563 continue_store_activity (sa);
1569 * Context for record remove operations passed from #handle_zone_to_name to
1570 * #handle_zone_to_name_it as closure
1572 struct ZoneToNameCtx
1577 struct NamestoreClient *nc;
1580 * Request id (to be used in the response to the client).
1585 * Set to #GNUNET_OK on success, #GNUNET_SYSERR on error. Note that
1586 * not finding a name for the zone still counts as a 'success' here,
1587 * as this field is about the success of executing the IPC protocol.
1594 * Zone to name iterator
1596 * @param cls struct ZoneToNameCtx *
1597 * @param seq sequence number of the record, MUST NOT BE ZERO
1598 * @param zone_key the zone key
1600 * @param rd_count number of records in @a rd
1601 * @param rd record data
1604 handle_zone_to_name_it (void *cls,
1606 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1608 unsigned int rd_count,
1609 const struct GNUNET_GNSRECORD_Data *rd)
1611 struct ZoneToNameCtx *ztn_ctx = cls;
1612 struct GNUNET_MQ_Envelope *env;
1613 struct ZoneToNameResponseMessage *ztnr_msg;
1621 GNUNET_assert (0 != seq);
1622 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1623 "Found result for zone-to-name lookup: `%s'\n",
1626 name_len = (NULL == name) ? 0 : strlen (name) + 1;
1627 rd_ser_len = GNUNET_GNSRECORD_records_get_size (rd_count, rd);
1631 ztn_ctx->success = GNUNET_SYSERR;
1634 msg_size = sizeof(struct ZoneToNameResponseMessage) + name_len + rd_ser_len;
1635 if (msg_size >= GNUNET_MAX_MESSAGE_SIZE)
1638 ztn_ctx->success = GNUNET_SYSERR;
1642 GNUNET_MQ_msg_extra (ztnr_msg,
1643 name_len + rd_ser_len,
1644 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME_RESPONSE);
1645 ztnr_msg->gns_header.header.size = htons (msg_size);
1646 ztnr_msg->gns_header.r_id = htonl (ztn_ctx->rid);
1647 ztnr_msg->res = htons (res);
1648 ztnr_msg->rd_len = htons (rd_ser_len);
1649 ztnr_msg->rd_count = htons (rd_count);
1650 ztnr_msg->name_len = htons (name_len);
1651 ztnr_msg->zone = *zone_key;
1652 name_tmp = (char *) &ztnr_msg[1];
1653 GNUNET_memcpy (name_tmp, name, name_len);
1654 rd_tmp = &name_tmp[name_len];
1657 GNUNET_GNSRECORD_records_serialize (rd_count, rd, rd_ser_len, rd_tmp));
1658 ztn_ctx->success = GNUNET_OK;
1659 GNUNET_MQ_send (ztn_ctx->nc->mq, env);
1664 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME message
1666 * @param cls client client sending the message
1667 * @param ztn_msg message of type 'struct ZoneToNameMessage'
1670 handle_zone_to_name (void *cls, const struct ZoneToNameMessage *ztn_msg)
1672 struct NamestoreClient *nc = cls;
1673 struct ZoneToNameCtx ztn_ctx;
1674 struct GNUNET_MQ_Envelope *env;
1675 struct ZoneToNameResponseMessage *ztnr_msg;
1677 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received ZONE_TO_NAME message\n");
1678 ztn_ctx.rid = ntohl (ztn_msg->gns_header.r_id);
1680 ztn_ctx.success = GNUNET_NO;
1681 if (GNUNET_SYSERR == GSN_database->zone_to_name (GSN_database->cls,
1683 &ztn_msg->value_zone,
1684 &handle_zone_to_name_it,
1687 /* internal error, hang up instead of signalling something
1688 that might be wrong */
1690 GNUNET_SERVICE_client_drop (nc->client);
1693 if (GNUNET_NO == ztn_ctx.success)
1695 /* no result found, send empty response */
1696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1697 "Found no result for zone-to-name lookup.\n");
1698 env = GNUNET_MQ_msg (ztnr_msg,
1699 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME_RESPONSE);
1700 ztnr_msg->gns_header.r_id = ztn_msg->gns_header.r_id;
1701 ztnr_msg->res = htons (GNUNET_NO);
1702 GNUNET_MQ_send (nc->mq, env);
1704 GNUNET_SERVICE_client_continue (nc->client);
1709 * Context for record remove operations passed from
1710 * #run_zone_iteration_round to #zone_iterate_proc as closure
1712 struct ZoneIterationProcResult
1715 * The zone iteration handle
1717 struct ZoneIteration *zi;
1720 * Number of results left to be returned in this iteration.
1727 * Process results for zone iteration from database
1729 * @param cls struct ZoneIterationProcResult
1730 * @param seq sequence number of the record, MUST NOT BE ZERO
1731 * @param zone_key the zone key
1733 * @param rd_count number of records for this name
1734 * @param rd record data
1737 zone_iterate_proc (void *cls,
1739 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
1741 unsigned int rd_count,
1742 const struct GNUNET_GNSRECORD_Data *rd)
1744 struct ZoneIterationProcResult *proc = cls;
1745 int do_refresh_block;
1747 GNUNET_assert (0 != seq);
1748 if ((NULL == zone_key) && (NULL == name))
1750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Iteration done\n");
1753 if ((NULL == zone_key) || (NULL == name))
1755 /* what is this!? should never happen */
1759 if (0 == proc->limit)
1761 /* what is this!? should never happen */
1766 proc->zi->seq = seq;
1767 send_lookup_response (proc->zi->nc,
1768 proc->zi->request_id,
1775 do_refresh_block = GNUNET_NO;
1776 for (unsigned int i = 0; i < rd_count; i++)
1777 if (0 != (rd[i].flags & GNUNET_GNSRECORD_RF_RELATIVE_EXPIRATION))
1779 do_refresh_block = GNUNET_YES;
1782 if (GNUNET_YES == do_refresh_block)
1783 refresh_block (NULL, proc->zi, 0, zone_key, name, rd_count, rd);
1788 * Perform the next round of the zone iteration.
1790 * @param zi zone iterator to process
1791 * @param limit number of results to return in one pass
1794 run_zone_iteration_round (struct ZoneIteration *zi, uint64_t limit)
1796 struct ZoneIterationProcResult proc;
1797 struct GNUNET_TIME_Absolute start;
1798 struct GNUNET_TIME_Relative duration;
1800 memset (&proc, 0, sizeof(proc));
1801 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1802 "Asked to return up to %llu records at position %llu\n",
1803 (unsigned long long) limit,
1804 (unsigned long long) zi->seq);
1807 start = GNUNET_TIME_absolute_get ();
1808 GNUNET_break (GNUNET_SYSERR !=
1809 GSN_database->iterate_records (GSN_database->cls,
1810 (0 == GNUNET_is_zero (&zi->zone))
1817 duration = GNUNET_TIME_absolute_get_duration (start);
1818 duration = GNUNET_TIME_relative_divide (duration, limit - proc.limit);
1819 GNUNET_STATISTICS_set (statistics,
1820 "NAMESTORE iteration delay (μs/record)",
1821 duration.rel_value_us,
1823 if (0 == proc.limit)
1824 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1825 "Returned %llu results, more results available\n",
1826 (unsigned long long) limit);
1827 zi->send_end = (0 != proc.limit);
1828 if (0 == zi->cache_ops)
1829 zone_iteration_done_client_continue (zi);
1834 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START message
1836 * @param cls the client sending the message
1837 * @param zis_msg message from the client
1840 handle_iteration_start (void *cls,
1841 const struct ZoneIterationStartMessage *zis_msg)
1843 struct NamestoreClient *nc = cls;
1844 struct ZoneIteration *zi;
1846 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1847 "Received ZONE_ITERATION_START message\n");
1848 zi = GNUNET_new (struct ZoneIteration);
1849 zi->request_id = ntohl (zis_msg->gns_header.r_id);
1852 zi->zone = zis_msg->zone;
1854 GNUNET_CONTAINER_DLL_insert (nc->op_head, nc->op_tail, zi);
1855 run_zone_iteration_round (zi, 1);
1860 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP message
1862 * @param cls the client sending the message
1863 * @param zis_msg message from the client
1866 handle_iteration_stop (void *cls,
1867 const struct ZoneIterationStopMessage *zis_msg)
1869 struct NamestoreClient *nc = cls;
1870 struct ZoneIteration *zi;
1873 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1874 "Received ZONE_ITERATION_STOP message\n");
1875 rid = ntohl (zis_msg->gns_header.r_id);
1876 for (zi = nc->op_head; NULL != zi; zi = zi->next)
1877 if (zi->request_id == rid)
1882 GNUNET_SERVICE_client_drop (nc->client);
1885 GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, zi);
1887 GNUNET_SERVICE_client_continue (nc->client);
1892 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT message
1894 * @param cls the client sending the message
1895 * @param message message from the client
1898 handle_iteration_next (void *cls,
1899 const struct ZoneIterationNextMessage *zis_msg)
1901 struct NamestoreClient *nc = cls;
1902 struct ZoneIteration *zi;
1906 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1907 "Received ZONE_ITERATION_NEXT message\n");
1908 GNUNET_STATISTICS_update (statistics,
1909 "Iteration NEXT messages received",
1912 rid = ntohl (zis_msg->gns_header.r_id);
1913 limit = GNUNET_ntohll (zis_msg->limit);
1914 for (zi = nc->op_head; NULL != zi; zi = zi->next)
1915 if (zi->request_id == rid)
1920 GNUNET_SERVICE_client_drop (nc->client);
1923 run_zone_iteration_round (zi, limit);
1928 * Function called when the monitor is ready for more data, and we
1929 * should thus unblock PUT operations that were blocked on the
1930 * monitor not being ready.
1933 monitor_unblock (struct ZoneMonitor *zm)
1935 struct StoreActivity *sa = sa_head;
1937 while ((NULL != sa) && (zm->limit > zm->iteration_cnt))
1939 struct StoreActivity *sn = sa->next;
1941 if (sa->zm_pos == zm)
1942 continue_store_activity (sa);
1945 if (zm->limit > zm->iteration_cnt)
1947 zm->sa_waiting = GNUNET_NO;
1948 if (NULL != zm->sa_wait_warning)
1950 GNUNET_SCHEDULER_cancel (zm->sa_wait_warning);
1951 zm->sa_wait_warning = NULL;
1954 else if (GNUNET_YES == zm->sa_waiting)
1956 zm->sa_waiting_start = GNUNET_TIME_absolute_get ();
1957 if (NULL != zm->sa_wait_warning)
1958 GNUNET_SCHEDULER_cancel (zm->sa_wait_warning);
1959 zm->sa_wait_warning =
1960 GNUNET_SCHEDULER_add_delayed (MONITOR_STALL_WARN_DELAY,
1968 * Send 'sync' message to zone monitor, we're now in sync.
1970 * @param zm monitor that is now in sync
1973 monitor_sync (struct ZoneMonitor *zm)
1975 struct GNUNET_MQ_Envelope *env;
1976 struct GNUNET_MessageHeader *sync;
1978 env = GNUNET_MQ_msg (sync, GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_SYNC);
1979 GNUNET_MQ_send (zm->nc->mq, env);
1980 /* mark iteration done */
1981 zm->in_first_iteration = GNUNET_NO;
1982 zm->iteration_cnt = 0;
1983 if ((zm->limit > 0) && (zm->sa_waiting))
1984 monitor_unblock (zm);
1989 * Obtain the next datum during the zone monitor's zone initial iteration.
1991 * @param cls zone monitor that does its initial iteration
1994 monitor_iteration_next (void *cls);
1998 * A #GNUNET_NAMESTORE_RecordIterator for monitors.
2000 * @param cls a 'struct ZoneMonitor *' with information about the monitor
2001 * @param seq sequence number of the record, MUST NOT BE ZERO
2002 * @param zone_key zone key of the zone
2004 * @param rd_count number of records in @a rd
2005 * @param rd array of records
2008 monitor_iterate_cb (void *cls,
2010 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
2012 unsigned int rd_count,
2013 const struct GNUNET_GNSRECORD_Data *rd)
2015 struct ZoneMonitor *zm = cls;
2017 GNUNET_assert (0 != seq);
2019 GNUNET_assert (NULL != name);
2020 GNUNET_STATISTICS_update (statistics,
2021 "Monitor notifications sent",
2025 zm->iteration_cnt--;
2026 send_lookup_response (zm->nc, 0, zone_key, name, rd_count, rd);
2027 if ((0 == zm->iteration_cnt) && (0 != zm->limit))
2029 /* We are done with the current iteration batch, AND the
2030 client would right now accept more, so go again! */
2031 GNUNET_assert (NULL == zm->task);
2032 zm->task = GNUNET_SCHEDULER_add_now (&monitor_iteration_next, zm);
2038 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_START message
2040 * @param cls the client sending the message
2041 * @param zis_msg message from the client
2044 handle_monitor_start (void *cls, const struct ZoneMonitorStartMessage *zis_msg)
2046 struct NamestoreClient *nc = cls;
2047 struct ZoneMonitor *zm;
2049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received ZONE_MONITOR_START message\n");
2050 zm = GNUNET_new (struct ZoneMonitor);
2052 zm->zone = zis_msg->zone;
2054 zm->in_first_iteration = (GNUNET_YES == ntohl (zis_msg->iterate_first));
2055 GNUNET_CONTAINER_DLL_insert (monitor_head, monitor_tail, zm);
2056 GNUNET_SERVICE_client_mark_monitor (nc->client);
2057 GNUNET_SERVICE_client_continue (nc->client);
2058 GNUNET_notification_context_add (monitor_nc, nc->mq);
2059 if (zm->in_first_iteration)
2060 zm->task = GNUNET_SCHEDULER_add_now (&monitor_iteration_next, zm);
2067 * Obtain the next datum during the zone monitor's zone initial iteration.
2069 * @param cls zone monitor that does its initial iteration
2072 monitor_iteration_next (void *cls)
2074 struct ZoneMonitor *zm = cls;
2078 GNUNET_assert (0 == zm->iteration_cnt);
2080 zm->iteration_cnt = zm->limit / 2; /* leave half for monitor events */
2082 zm->iteration_cnt = zm->limit; /* use it all */
2083 ret = GSN_database->iterate_records (GSN_database->cls,
2084 (0 == GNUNET_is_zero (&zm->zone))
2089 &monitor_iterate_cb,
2091 if (GNUNET_SYSERR == ret)
2093 GNUNET_SERVICE_client_drop (zm->nc->client);
2096 if (GNUNET_NO == ret)
2106 * Handles a #GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_NEXT message
2108 * @param cls the client sending the message
2109 * @param nm message from the client
2112 handle_monitor_next (void *cls, const struct ZoneMonitorNextMessage *nm)
2114 struct NamestoreClient *nc = cls;
2115 struct ZoneMonitor *zm;
2118 inc = GNUNET_ntohll (nm->limit);
2119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2120 "Received ZONE_MONITOR_NEXT message with limit %llu\n",
2121 (unsigned long long) inc);
2122 for (zm = monitor_head; NULL != zm; zm = zm->next)
2128 GNUNET_SERVICE_client_drop (nc->client);
2131 GNUNET_SERVICE_client_continue (nc->client);
2132 if (zm->limit + inc < zm->limit)
2135 GNUNET_SERVICE_client_drop (nc->client);
2139 if ((zm->in_first_iteration) && (zm->limit == inc))
2141 /* We are still iterating, and the previous iteration must
2142 have stopped due to the client's limit, so continue it! */
2143 GNUNET_assert (NULL == zm->task);
2144 zm->task = GNUNET_SCHEDULER_add_now (&monitor_iteration_next, zm);
2146 GNUNET_assert (zm->iteration_cnt <= zm->limit);
2147 if ((zm->limit > zm->iteration_cnt) && (zm->sa_waiting))
2149 monitor_unblock (zm);
2151 else if (GNUNET_YES == zm->sa_waiting)
2153 if (NULL != zm->sa_wait_warning)
2154 GNUNET_SCHEDULER_cancel (zm->sa_wait_warning);
2155 zm->sa_waiting_start = GNUNET_TIME_absolute_get ();
2156 zm->sa_wait_warning =
2157 GNUNET_SCHEDULER_add_delayed (MONITOR_STALL_WARN_DELAY,
2165 * Process namestore requests.
2167 * @param cls closure
2168 * @param cfg configuration to use
2169 * @param service the initialized service
2173 const struct GNUNET_CONFIGURATION_Handle *cfg,
2174 struct GNUNET_SERVICE_Handle *service)
2180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting namestore service\n");
2182 GNUNET_CONFIGURATION_get_value_yesno (cfg, "namestore", "CACHE_KEYS");
2184 GNUNET_CONFIGURATION_get_value_yesno (cfg, "namecache", "DISABLE");
2186 monitor_nc = GNUNET_notification_context_create (1);
2187 if (GNUNET_YES != disable_namecache)
2189 namecache = GNUNET_NAMECACHE_connect (cfg);
2190 GNUNET_assert (NULL != namecache);
2192 /* Loading database plugin */
2193 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg,
2197 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "No database backend configured\n");
2199 GNUNET_asprintf (&db_lib_name, "libgnunet_plugin_namestore_%s", database);
2200 GSN_database = GNUNET_PLUGIN_load (db_lib_name, (void *) GSN_cfg);
2201 GNUNET_free (database);
2202 statistics = GNUNET_STATISTICS_create ("namestore", cfg);
2203 GNUNET_SCHEDULER_add_shutdown (&cleanup_task, NULL);
2204 if (NULL == GSN_database)
2206 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2207 "Could not load database backend `%s'\n",
2209 GNUNET_SCHEDULER_shutdown ();
2216 * Define "main" method using service macro.
2218 GNUNET_SERVICE_MAIN (
2220 GNUNET_SERVICE_OPTION_NONE,
2223 &client_disconnect_cb,
2225 GNUNET_MQ_hd_var_size (record_store,
2226 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_STORE,
2227 struct RecordStoreMessage,
2229 GNUNET_MQ_hd_var_size (record_lookup,
2230 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_LOOKUP,
2231 struct LabelLookupMessage,
2233 GNUNET_MQ_hd_fixed_size (zone_to_name,
2234 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_TO_NAME,
2235 struct ZoneToNameMessage,
2237 GNUNET_MQ_hd_fixed_size (iteration_start,
2238 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START,
2239 struct ZoneIterationStartMessage,
2241 GNUNET_MQ_hd_fixed_size (iteration_next,
2242 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT,
2243 struct ZoneIterationNextMessage,
2245 GNUNET_MQ_hd_fixed_size (iteration_stop,
2246 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP,
2247 struct ZoneIterationStopMessage,
2249 GNUNET_MQ_hd_fixed_size (monitor_start,
2250 GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_START,
2251 struct ZoneMonitorStartMessage,
2253 GNUNET_MQ_hd_fixed_size (monitor_next,
2254 GNUNET_MESSAGE_TYPE_NAMESTORE_MONITOR_NEXT,
2255 struct ZoneMonitorNextMessage,
2257 GNUNET_MQ_handler_end ());
2260 /* end of gnunet-service-namestore.c */